JP4297947B2 - Sewing machine with bobbin winder - Google Patents

Description

  The present invention relates to a sewing machine with a lower thread winding device that can wind a lower thread around a bobbin without removing the bobbin from the hook.

  Conventionally, various sewing machines with a bobbin thread winding device that can supply bobbin thread to a bobbin without removing the bobbin from the hook have been proposed.

  Examples of these conventional examples include those described in Japanese Patent Publication No. 60-42745 or Japanese Patent Publication No. 3-27230. Each of the sewing machines with a lower thread winding device for a horizontal hook described in Japanese Patent Publication No. 60-42745 or Japanese Patent Publication No. 3-27230 is used as a lower thread for supplying only an upper thread to a bobbin. When the bobbin is supplied with bobbin thread, the upper thread that is scooped by the sword tip of the outer hook and rotates around the inner hook is guided to the lower thread tension spring, and the bobbin rotates to catch the thread in the bobbin notch and wind it. To be taken.

Japanese Patent Publication No. 60-42745 Japanese Patent Publication No. 3-27230

  By the way, in recent years, operability, safety and quality have been constantly improved in various products, and in order to improve operability, safety and quality of sewing products even in sewing machines with a bobbin thread winding device, sewing operations In addition, there is a demand for a device that performs a thread winding operation safely and appropriately.

  That is, in the above-described conventional sewing machine with a bobbin thread winding device, the thread is guided to the notch of the bobbin using the sword tip of the outer hook, so that the thread does not enter the notch of the bobbin during the sewing operation. The configuration is complicated, and the bobbin is rotated during bobbin winding so that the bobbin axis is aligned with the outer hook axis. It is difficult to secure a space for installing a thread feeding device, etc., and there is a problem that hitch stitches are likely to cause deterioration of the quality of the sewing product. When the bobbin rotation stops due to the occurrence of trouble such as hooking, the bobbin rotation cannot be stopped, and part of the bobbin drive mechanism that rotates the bobbin during the bobbin winding operation The problem is that the bobbin stored inside the inner hook, which is called bobbin rampage, may break out without normal rotation, and only the upper thread that is threaded can be wound as the lower thread. When sewing the upper thread and lower thread using different threads such as embroidery sewing, it is necessary to hang the used lower thread as the upper thread, which requires a lot of labor and time during the winding operation. There were a wide variety of problems.

  The present invention has been made in view of this point, and is capable of supplying a bobbin thread to a bobbin without removing the bobbin from the hook, and capable of performing a sewing operation and a bobbin winding operation safely and appropriately. An object is to provide a sewing machine with a device.

In order to achieve the above-mentioned object, the sewing machine with a lower thread winding device according to claim 1 of the present invention is characterized in that the lower thread can be supplied to the bobbin without removing the bobbin from the hook. In a sewing machine with a bobbin winder, an embroidery device equipped with an X motor and a Y motor that move the embroidery frame in the vertical and horizontal directions and detachably attached to the machine bed, and a bobbin thread spool on which a bobbin thread is wound And at a position on the embroidery device side of the sewing machine bed of the sewing machine bed of the sewing machine body, at least so that the bobbin thread piece can be attached / detached without attaching / detaching the embroidery frame of the embroidery device. and lower yarn thread spool mounting part provided, comprising a flange and a lower flange on which is disposed so as to face each other at both ends of the bobbin central axis and on said flange with an opening in the outer peripheral edge slit A bobbin formed with a bobbin thread wound around the outer peripheral surface of the bobbin central shaft, an inner hook that accommodates the bobbin so as to freely rotate, and supports the inner hook in a non-rotating manner in the interior and is synchronized with the upper shaft. And a horizontal hook provided with an outer hook provided with a sword that captures the upper thread, a bobbin driving member for rotating the bobbin during the thread winding operation, and a thread for the lower thread dedicated thread supplied at least during the thread winding operation A thread holding member formed such that the tip end portion is normally retracted to the vicinity of the outer peripheral surface of the outer hook and the tip end portion is allowed to enter above the bobbin during the yarn winding operation, and the yarn holding member. are integrally formed, and a dedicated thread tension imparting means for imparting tension to the lower thread supplied thread supplied to the bobbin through the formed yarn hooking groove between the lower yarn thread spool mounting part during the thread winding operation In the point. By adopting such a configuration, it is possible to easily supply the bobbin exclusive thread used for the upper thread or the embroidery sewing to the bobbin without removing the bobbin from the horizontal hook during the thread winding operation with a simple structure. Furthermore, dedicated yarn tensioning means, it is possible to impart a proper tension to the lower thread supplied thread supplied to the bobbin during winding operation, it can be wound bobbin thread supplied thread in an appropriate state to bobbin .

  According to the sewing machine with a bobbin thread winding device according to the present invention, it is possible to supply the bobbin thread to the bobbin without removing the bobbin from the hook, and it is possible to perform the sewing operation and the bobbin winding operation safely and appropriately. Has the effect.

  The present invention will be described below with reference to embodiments shown in the drawings.

  FIGS. 1 to 29 show an example of an embodiment of a sewing machine with a bobbin thread winding device according to the present invention, FIG. 1 is an external perspective view of the main part, and FIG. 2 shows the structure of the main part near the horizontal hook. FIG. 3 is a partially cut cross-sectional view showing the configuration of the main part near the horizontal hook, FIG. 4 is an exploded view showing the structure of the main part near the outer hook, and FIG. 5 is a perspective view showing the lower thread tension means. 6 is a plan view showing the vicinity of the bottom of the inner hook, FIG. 7 is a longitudinal sectional view showing the bobbin, FIG. 8 is a plan view of FIG. 7, FIG. 9 is a plan view showing the main part of the thread holding member, and FIG. FIG. 11 is a partially enlarged plan view of FIG. 9, FIG. 12 is a perspective view showing the main part of the thread holding member exposing means, FIG. 13 is a perspective view showing the main part near the needle plate, FIG. Is a perspective view showing the main part of the bobbin driving member moving means, FIG. 15 is an explanatory view showing the structure of another example of the rotary transmission mechanism, and FIG. FIG. 17 is an explanatory view showing a configuration of a main part of an example of an upper thread feeding mechanism, FIG. 18 is an exploded perspective view showing a configuration of a main part of an example of a needle bar cutting mechanism, and FIG. FIG. 20 is a plan view of FIG. 19, FIG. 21 is an explanatory view showing the configuration of the main part of an example of the operation unit, and FIG. 22 is an example of dedicated lower thread holding detection means. FIG. 23 is a side sectional view taken along line YY in FIG. 22, FIG. 24 is a side sectional view taken along line ZZ in FIG. 22, and FIG. 25 is a cloth feed mechanism. FIG. 26 is a front view of the main part of FIG. 25, FIG. 27 is a block diagram showing the structure of the main part of the control means, and FIG. 28 shows the bobbin winding amount. FIG. 29 is an explanatory view showing the limit number of times of bobbin thread winding.

  The sewing machine with the bobbin thread winding device of the present embodiment is used for a sewing machine that performs embroidery sewing so that a bobbin thread or upper thread can be selected as the bobbin thread to be supplied to the bobbin during the bobbin winding operation. Has been.

  As shown in FIG. 1, the sewing machine main body 1a of the sewing machine 1 with the lower thread winding device of the present embodiment has a sewing machine bed 1b arranged at the lower part and a sewing machine arm 1c arranged in parallel with the sewing machine bed 1b at the upper part. The sewing machine bed 1b and the sewing machine arm 1c are connected to each other by a sewing machine leg 1d shown on the right side of FIG. The sewing bed 1b is provided with a known detachable embroidery device 240 having a substantially U-shaped plane, and the sewing product S is set on the embroidery frame 239 of the embroidery device 240 attached to the sewing bed 1b. In this state, a predetermined shape can be sewn while moving the embroidery frame 239 in the vertical and horizontal (XY) directions. The detachment state of the embroidery device 240 can be sent to the control means 93 by an embroidery device sensor 217 (FIG. 27) described later.

  A sewn product S is pressed from above at a desired position below a sewing head 1e located at a free end called a head of the sewing machine arm 1c shown on the left side of the sewing machine arm 1c in FIG. The presser foot 208 is provided, and the presser foot 208 can be moved up and down by a known presser mechanism (not shown). Below the sewing machine arm 1c, a start / stop switch 238 used to turn on / off the sewing operation from the sewing head 1e toward the sewing machine pedestal 1d, a reverse stitching switch 301 used to turn on / off the reverse stitching, and a sewing operation are provided. A thread trimming switch 302 that is used to operate a well-known thread cutting device (not shown) that cuts a thread connected to the sewing product S after the sewing is finished, a sewing speed adjustment volume switch 303 that controls the sewing speed during the sewing operation, and the like are provided. Yes. The start / stop switch 238, the reverse stitching switch 301, the thread trimming switch 302, and the sewing speed adjustment volume 303 switch are electrically connected to the control means 93 described later. An operation unit 170 is provided on the front side of the sewing machine column 1d. A detailed configuration of the operation unit 170 will be described later.

  As shown in FIGS. 2 and 3, the sewing machine 1 with the lower thread winding device of the present embodiment has an upper shaft (at the time of sewing operation) by a known needle bar mechanism disposed inside the sewing machine head 1 e (FIG. 1). Both have a horizontal hook 4 as a hook disposed in front of the needle 3 attached to the tip of the needle bar 2 reciprocating in the vertical direction in conjunction with each other. The horizontal hook 4 is a sewing machine frame 1f called a sewing machine frame constituting the sewing machine main body 1a (FIG. 1) so as to be positioned below a needle plate 5 shown in the upper part of FIG. 3 constituting a part of the sewing machine bed 1b. , More specifically, in the sewing machine bed 1b, and in cooperation with a well-known needle bar mechanism, a balance mechanism, a cloth feed mechanism 310 (FIGS. 25 and 26) described later, and the like at the time of sewing operation It is designed to form seams. The reciprocating motion of the needle bar 2 that reciprocates the needle 3 up and down in conjunction with the upper shaft during the sewing operation is performed during the thread winding operation by a needle bar cutting mechanism 140 (FIG. 18) described later. By disconnecting from the rotation of the upper shaft, the reciprocating motion of the needle 3 in the vertical direction is stopped and the needle 3 can be held upward.

  The horizontal hook 4 has an outer hook 7 that rotates in the counterclockwise direction when viewed from above as shown by arrow A in FIG. 2 in conjunction with the lower shaft 311 (FIG. 25) during a sewing operation. As shown in FIG. 3, the outer hook 7 is formed in a two-stage substantially cylindrical shape having an upper portion as a large diameter portion 7a and a lower portion as a small diameter portion 7b. A screw gear 8 (FIG. 3) that meshes with a screw gear (not shown) fixed to the lower shaft 311 is fixed to the small diameter portion 7 b of the outer hook 7. 8 is configured to be rotatable in conjunction with the rotational movement of the lower shaft 311 that is rotationally driven in conjunction with the upper shaft. That is, the outer hook 7 of the horizontal hook 4 rotates in synchronization with the upper shaft.

  As shown in FIGS. 3 and 4, a hook shaft 9 formed in a substantially cylindrical shape is disposed in the shaft center portion of the outer hook 7 so as to pass through the shaft center portion of the screw gear 8. The lower end of the hook shaft 9 is fixed to a hook mounting base 10 shown in the lower part of FIG. The shuttle mount 10 is attached to a base frame 33 fixed inside the sewing machine bed 1b of the sewing machine frame 1f. As shown in FIGS. 3 and 4, a bobbin driving member 11 whose upper and lower ends protrude from the upper and lower ends of the hook shaft 9 is rotatable and axially movable at the shaft center portion of the hook shaft 9. The upper end of the bobbin driving member urging spring 12 disposed on the lower outer peripheral surface of the bobbin driving member 11 is brought into contact with the lower end surface of the hook shaft 9 or the hook mounting base 10, and the bobbin driving member The bobbin driving member 11 is normally urged downward by bringing the lower end of the urging spring 12 into contact with the upper surface of the retaining ring 13 attached in the vicinity of the lower end of the bobbin driving member 11.

  As shown in detail in FIG. 4, a bobbin driving gear 14 is provided at the upper end of the bobbin driving member 11. The bobbin drive gear 14 rotates coaxially with the outer hook 7 inside the stepped portion 7c that connects the large diameter portion 7a and the small diameter portion 7b of the outer hook 7, in detail, the outer pot bottom portion 7e that is the inner bottom of the large diameter portion 7a. It is always fitted in a gear hole 17 having the same shape as the bobbin drive gear 14 provided so as to penetrate the axial center portion of the outer pot bottom plate 16 arranged in the plate thickness direction. The outer bottom plate 16 includes a substantially disc-shaped base portion 16a having the gear hole 17 in the shaft center portion, and a plurality of flat plate-like members extending from the lower outer peripheral surface of the base portion 16a toward the radially outer side. In the embodiment, there are four engaging projections 16b arranged at equal angles. A magnetic body (magnet) 332 as a pressure contact member formed in an annular shape is disposed on the top of the outer pot bottom plate 16. The base 16a of the outer hook bottom plate 16 is fitted to the inner peripheral surface of the magnetic body 332, and a plurality of, in the present embodiment, four engaging grooves 332a are formed on the lower surface of the magnetic body 332. The engagement protrusions 16b of the outer hook bottom plate 16 are engaged with the engagement grooves 332a, respectively.

  That is, the magnetic body 332 can be attracted to the outer pot bottom portion 7e of the outer hook 7 with the outer hook bottom plate 16 interposed therebetween by the magnetic force. As a result, the rotation of the outer hook 7 is transmitted to the magnetic body 332. The magnetic body 332 is rotated in the same direction as the outer hook 7, and the rotation of the magnetic body 332 is transmitted to the outer hook bottom plate 16 via the engaging protrusion 16 b that engages with the engaging groove 332 a of the magnetic body 332. The outer hook bottom plate 16 is rotated in the same direction as the outer hook 7, and the rotation of the outer hook bottom plate 16 is performed via a bobbin drive gear 14 meshed with a gear hole 17 formed in the shaft center portion of the outer hook bottom plate 16. The bobbin driving member 11 is rotated in the same direction as the outer hook 7, and the bobbin driving member 11 is integrally rotated so that the outer hook 7 and the rotation center are located on the same axis.

  The outer hook bottom plate 16 and the magnetic body 332 as the pressure contact member are provided with the pressure contact member of the present embodiment, and the pressure contact member is slidably locked to the outer hook 7 to rotate the outer hook 7 to the bobbin driving member 11. A driving force transmission means 330 is configured to transmit.

  The driving force transmitting means 330 can be slidably locked to the outer hook 7 by a pressure contact member and can transmit the rotation of the outer hook 7 to the bobbin driving member 11, for example, the outer hook bottom plate 16 and the magnetic force. The body 332 is integrally formed, specifically, a disk-shaped magnetic body is formed of a magnetic material and the gear hole 17 is provided in the axial center thereof, or the magnetic body is fixed or fixed to the outer pot bottom plate 16 Or a plate spring provided on the outer pot bottom portion 7e of the outer pot 7 so as to compress the outer pot bottom plate 16 is not particularly limited to the shape and configuration of the present embodiment. .

  As shown in FIG. 3, an inner hook 18 having a substantially cup shape with an opening at the top is disposed inside the large diameter portion 7 a of the outer hook 7. A bobbin 22 to be described later can be stored so as to be freely rotatable. The inner hook 18 is made of, for example, resin, and an adsorbent formed in a substantially U shape with a material attracted by magnetic force, for example, steel, on a surface of the inner hook 18 facing the outer pot bottom 7e. 18a is fixed. The inner hook 18 is rotatably supported by a race surface 7d formed on the inner peripheral surface of the large diameter portion 7a of the outer hook 7. That is, the outer hook 7 is configured to support the inner hook 18 in a non-rotating manner on the inner side thereof. Furthermore, since the inner hook 18 of this embodiment is urged toward the outer hook 7, specifically, the outer hook bottom 7 e of the outer hook 7 by the magnetic force of the magnetic body 332 when mounted on the outer hook 7. The inner hook 18 can easily hold a state where it is rotatably supported at a predetermined position of the outer hook 7, and as a result, the inner hook 18 can be reliably prevented from unnecessarily jumping out of the outer hook 7, Bobbin rampage can be reliably prevented. The inner hook 18 rotates forward together with the outer hook 7 by friction with the outer hook 7 when the outer hook 7 rotates forward during the sewing operation. The rotation of the inner hook 18 is caused by the upper end of the outer hook 7. The protrusion 19 (FIG. 2) provided on the outer peripheral surface of the inner hook 18 positioned at a higher position can be stopped by contacting the inner hook rotation stopper 20 (FIG. 2) fixed to the sewing machine frame 1f. It has become. The reverse rotation of the inner hook 18 when the outer hook 7 is reversely rotated can be stopped by an elastic inner hook reverse stopper 21 (FIG. 2) fixed to the sewing machine frame 1f. Further, a bobbin housing hole 23 formed in a substantially cylindrical shape for housing a bobbin 22 described later is recessed in the inner hook 18. The shaft center of the bobbin housing hole 23 is arranged to be shifted to the left as viewed from the upstream side in the cloth feeding direction with respect to the shaft center of the outer hook 7. That is, the bobbin driving member 11 and the outer hook 7 are formed so that the respective rotation centers are located on the same axis, and the inner hook 18, specifically the bobbin 22 housed in the bobbin housing hole 23, The outer hook 7 is formed such that the respective rotation centers are positioned in parallel to each other on the extension line of the respective rotation centers. The horizontal hook 4 in which the axis of the bobbin housing hole 23 is shifted with respect to the axis of the outer hook 7, that is, the eccentric shaft in which the rotation center of the inner hook 18 is shifted with respect to the rotation center of the outer hook 7. The horizontal hook 4 can easily prevent hitch stitches during the sewing operation to improve the quality of the sewing product, and easily secures a space for installing a not-shown thread trimming device and lower thread feeding device. Be able to. A bobbin attaching / detaching groove 24 having an open top is formed on a part of the peripheral surface of the bobbin receiving hole 23 so that the bobbin 22 can be easily attached to and detached from the bobbin receiving hole 23. Further, a bobbin thread tension means 25 (FIG. 5) that also serves as a part of the bobbin storage hole 23 is disposed in a part of the upper part of the bobbin storage hole 23 in the circumferential direction.

  The lower thread tension means 25 is for applying an appropriate tension to the lower thread DS during the sewing operation after winding and supplying the lower thread DS to the bobbin 22, and as shown in FIG. The substrate 26 is formed in an arc shape. The inner peripheral surface of the substrate 26 has a curvature that is substantially the same as the inner diameter of the bobbin housing hole 23 or a slightly larger curvature than the inner diameter of the bobbin housing hole 23 so as to form a part of the inner surface of the bobbin housing hole 23. It is formed with. At the upper edge of the base plate 26, a thread introduction port 27 is formed through which the lower thread DS moving from the right to the left in FIG. 5 along the upper surface of the inner hook 18 when the outer hook 7 rotates in the reverse direction. The leading end of a thread introducing groove 28 that penetrates in the thickness direction with a width that allows the lower thread DS to pass through is connected to the thread introducing port 27. The rear end portion of the yarn introduction groove 28 is connected to a substantially circular yarn locking hole 29 penetrating in the plate thickness direction formed on the lower left side of FIG. Further, a groove-like thread outlet 30 is recessed at the upper end edge of the substrate 26 located on the left side of FIG. Further, a lower thread pressing plate spring 31 shown by an imaginary line in FIG. 5 is disposed in close contact with the outer peripheral surface of the substrate 26 in order to press the lower thread DS from the thread locking hole 29 to the thread outlet 30. As shown in FIG. 5, the lower thread DS wound around the seam is connected to the seam in a state where a predetermined tension is applied between the thread locking hole 29 and the thread outlet 30 by the lower thread pressing plate spring 31. Has been. The lower thread presser leaf spring 31 and the substrate 26 are fixed to the inner hook 18 by an attachment screw 32 after the lower thread retainer leaf spring 31 is overlaid on the outer peripheral surface of the substrate 26.

  The bottom 23a of the bobbin housing hole 23 shown in the lower part of FIG. 3 includes the axial center of the bobbin 22 that coincides with the axial center of the bobbin housing hole 23 and the axial center of the outer hook 7 as shown in FIG. An inner hook through hole 34 penetrating in the plate thickness direction is formed in the inner hook through hole 34 when the bobbin driving member 11 rises against the biasing force of the bobbin driving member biasing spring 12. In addition, the bobbin driving gear 14 provided at the upper end of the bobbin driving member 11 can enter. When the bobbin driving gear 14 enters the inner hook through-hole 34, the bobbin driving gear 14 is moved to the bobbin driven gear 35 constituting a part of the rotary transmission mechanism 340 formed on the bobbin 22 described later only during the thread winding operation. It is possible to mesh.

  As shown in FIG. 7, the bobbin 22 has a bobbin central shaft 36 around which the lower thread DS is wound, and both ends of the bobbin central shaft 36 are opposed to each other. An upper flange 37 and a lower flange 38 are provided. That is, an upper flange 37 is disposed at the upper end of the bobbin central shaft 36 and a lower flange 38 is disposed at the lower end. The lower end surface 38a of the lower flange 38 shown in the lower part of FIG. 7 has an upper end portion of the bobbin driving member 11 when the bobbin driving member 11 rises against the urging force of the bobbin driving member urging spring 12. A bobbin driven gear 35 that can mesh with the provided bobbin driving gear 14 is disposed with the axis of the same as the lower flange 38, that is, the axis of the bobbin 22. Further, as shown in FIG. 8, the upper flange 37 is formed with a slit 39 having an opening 39a on the outer peripheral edge. Further, the upper flange 37 and the lower flange 38 are arranged in parallel so as to face each other with a gap by the bobbin central shaft 36. Furthermore, as shown in FIG. 7, a substantially annular wall portion 40 protruding outward in the radial direction is formed at a connection portion with the upper flange 37 of the bobbin central shaft 36. A concave groove 41 as a yarn catching portion is formed between the lower surface of the upper flange 37, and a slit bottom 39b, which is the root of the slit 39, is connected to the concave groove 41 as the yarn catching portion. . The slit bottom 39 b is formed at a position away from the rotation center of the bobbin 22. In addition, an acute acute angle portion 39aa and an obtuse obtuse angle portion 39ab are formed on the outer peripheral edge of the upper flange 37 in which the opening 39a of the slit 39 is formed. That is, an acute acute angle portion 39aa is formed on the outer peripheral edge of the upper flange 37 in which the opening 39a of the slit 39 located on the leading side in the rotation direction of the bobbin 22 during the yarn winding operation indicated by the arrow in FIG. An obtuse angle is formed on the outer peripheral edge of the upper flange 37 in which the opening 39a of the slit 39 located on the rear side in the rotational direction of the bobbin 22 during the yarn winding operation indicated by the arrow in FIG. An obtuse angle part 39ab is formed so that the lower thread DS supplied during the thread winding operation can be reliably and easily captured.

  In addition, as a thread | yarn capture | acquisition part, the structure which provides a V-shaped groove | channel in the connection part with the upper flange 37 of the bobbin center axis | shaft 36 to which the bottom part 39b of the slit 39 is connected, or the bottom part 39b of the slit 39 is connected. The lower end DS of the lower thread DS to be supplied at the time of the bobbin winding operation such as a structure in which a concavity and convexity having a large friction coefficient, which is easy to catch the thread, is provided by spraying or blasting at the connection portion with the upper flange 37 of the bobbin central shaft 36 is surely secured. Any configuration that can be easily captured is acceptable.

  As shown in FIG. 8, on the upper surface of the upper flange 37, a high reflectivity portion 210a shown in white in FIG. 8 and a low reflectivity portion 210b shown in diagonal lines in FIG. Reflective tapes 210 that are alternately and repeatedly arranged at predetermined intervals are attached. The rotation of the reflective tape 210 when the bobbin 22 rotates causes the light beam disposed on the lower surface of the needle plate 5 to be opposed to the bobbin 22 on the lower surface of the hook cover 204 (FIG. 44). It can be detected by a reflective optical sensor 211 (FIG. 3) made up of a sensor or the like. The reflection type optical sensor 211 is electrically connected to the control means 93 to be described later (FIG. 27) so that the presence / absence of rotation of the bobbin 22 and the rotation state of the bobbin 22 can be sent to the control means 93. Has been.

  That is, the reflective tape 210 and the reflective optical sensor 211 of the present embodiment have a function of detecting the presence or absence of the lower thread DS wound around the bobbin 22 based on the presence or absence of rotation of the bobbin 22, Both have a function to detect the rotation state.

  The reflection tape 210 and the reflection type optical sensor 211 constitute a bobbin rotation state detection unit 215 as the lower thread detection unit 214 of the present embodiment.

  The bobbin rotation detected portion may have a configuration in which the high reflectivity portion 210a and the low reflectivity portion 210b are directly formed on the upper surface of the upper flange 37 instead of the reflective tape 210.

  Returning to FIG. 2, the outer peripheral surface of the large-diameter portion 7a of the outer hook 7 has a sword tip 42 for capturing the upper thread loop to form a seam during the sewing operation, and a lower thread DS positioned on the supply side after the winding operation. A cutting blade 43 and a scooping portion 44 for cutting are provided. Further, an opening 45 is formed on the front side of the cutting blade 43 adjacent to the cutting blade 43 in the rotation direction shown on the left side of FIG. Also, as shown in FIGS. 3 and 6, the outer peripheral surface of the large-diameter portion 7a of the outer hook 7 has a substantially U-shaped plane that captures the lower thread DS that is wound around and supplied to the bobbin 22 after the thread winding operation. A thread catching hook 46 provided so as to face the rotation direction when the outer hook 7 rotates in the reverse direction is projected from the hook portion 46a (FIG. 6) having a shape. On the back surface of the hook portion 46a of the thread catching hook 46, as shown in FIG. An inclined surface 47 for separating the yarn that can move in the separating direction is formed. The cutting blade 43 is fixed to the outer peripheral surface of the outer hook 7 in a direction substantially opposite to the sword tip 42 in a tangential direction. The yarn catching hook 46 and the cutting blade 43 are connected to the yarn catching hook 46. Until the lower thread DS is hooked onto the lower thread tension means 25, the cutting blade 43 extends from the portion of the lower thread DS wound around the outer peripheral surface of the outer hook 7 from the thread catching hook 46 to the thread holding member 48. The thread catching hook 46 is held on the outer circumferential surface of the outer hook 7 of the lower thread DS from the thread catching hook 46 to the thread holding member 48 after the thread catching hook 46 has finished threading the lower thread DS on the lower thread tension means 25. The positional relationship is set so that the cutting blade 43 comes into contact with the wound portion.

  As shown in FIG. 2, a thread holding member 48 is disposed on the right side of the horizontal hook 4 in FIG. This yarn holding member 48 is either the lower yarn DS during the yarn winding operation, regardless of whether the lower yarn dedicated thread EDS or the upper yarn US is selected as the lower yarn DS supplied to the bobbin 22 during the yarn winding operation. Holding the vicinity of one thread end, specifically, when the lower thread dedicated thread EDS is selected as the lower thread DS supplied to the bobbin 22, the lower thread dedicated to the lower thread dedicated thread EDS is held and supplied to the bobbin 22. When the upper thread US is selected as the DS, the vicinity of the upper end of the upper thread US can be captured. The thread holding member 48 has a substantially flat thread holding and catching portion 49 shown on the left side of FIG. 2 and a rear end portion on the right side of FIG. And an extended mounting portion 50. An attachment surface 50 a extending in parallel with the plate thickness direction of the yarn holding / capturing portion 49 is provided at the tip of the attaching portion 50, and the attachment surface 50 a is almost the same as the yarn holding / capturing portion 49. A front mounting pin 51 and a rear mounting pin 52, which are paired in a front and rear direction so as to be positioned in parallel, are projected toward the front side in FIG. Yes. Each of the pair of front and rear mounting pins 51 and 52 is movably supported by a thread holding member moving means 53 described later.

  As shown in FIGS. 9 and 10, the front end edge of the yarn holding and catching portion 49 constituting the yarn holding member 48 shown in the lower part of FIG. A substantially serrated hooking groove 54 through which the lower thread DS passes when the upper thread US is selected as the lower thread DS to be supplied to the belt 22 is formed. 9 protrudes toward the front side shown in the lower part of FIG. 9 and is inclined downward as shown in FIG. A rear tongue piece 55 that is bent and extended is formed.

  An upright portion 61 extending upward is formed on the distal end side of the rear tongue piece 55 shown on the left side of FIG. 9, and the upper end of the upright portion 61 is horizontally oriented toward the distal end side. An extended horizontal portion 62 is formed. The horizontal portion 62 is located on the left side of FIG. 9 and has a narrow, flat, substantially rectangular front horizontal portion located on the distal end side of the yarn holding and catching portion 49 with the rear edge shown in the upper part of FIG. 62a, and a wide planar substantially rectangular rear horizontal portion 62b connecting the front horizontal portion 62a and the upper end of the upright portion 61. Furthermore, the corner | angular part shown in FIG. 10 lower left part of the back horizontal part 62b is diagonally chamfered. Further, the front end of the front horizontal portion 62a is a thread holding / capturing front end 63, and this thread holding / capturing front end 63 is shown below the front end of the front horizontal portion 62a in FIG. 11 as shown in detail in FIG. A connecting portion 63a that is narrowly extended so that the front end edge is connected in a straight line, and a bent portion that is bent at a substantially right angle from the tip of the connecting portion 63a toward the back side shown in the upper part of FIG. 63b and the front end of the connecting portion 63b extending from the front end of the bent portion 63b toward the rear end portion shown on the right side of FIG. 11 and inclined downward as shown in FIG. And a bent tip portion 63c that is bent and extended so as to extend substantially in parallel to a nearby portion. Then, the end of the bent portion 63b on the rear end side shown in the right side of FIG. 11 is rotated by the bobbin 22 at the time of the bobbin operation. A yarn end cutting blade 56 for cutting is formed. Further, the space surrounded by the connecting portion 63a, the bent portion 63b, and the bent tip portion 63c of the yarn holding and catching tip 63 squeezes the yarn end of the upper yarn US supplied as the lower yarn DS during the yarn winding operation. The pitching opening 63d is used.

  As shown in FIG. 9, a lower thread DS to be supplied to the bobbin 22 at the time of the thread winding operation is provided at the substantially central portion in the width direction of the upper surface on the rear end side shown to the right of FIG. When the lower thread dedicated thread EDS is selected, a substantially horizontal L-shaped thread guide tongue 65 serving as a guide for the lower thread DS is formed so as to protrude upward with its free end toward the front side shown in the lower part of FIG. Has been. Note that the yarn guide tongue 65 may be provided according to the design concept or the like.

  As shown in FIGS. 9 and 10, a thread holding leaf spring 66 is closely attached to the top surface of the thread holding / capturing portion 49 on the tip side by a screw 67 (FIG. 9). The thread holding leaf spring 66 is formed with an upper groove 68 having the same shape as the hook groove 54 formed in the thread holding / capturing portion 49, and the upper end side of the upper groove 68 shown on the left in FIG. 9 is positioned above the rear tongue piece 55 so as to protrude toward the front side shown in the lower part of FIG. 9 and bend and extend so as to incline upward as shown in FIG. An upper rear tongue piece 69 is formed. Then, the inner side of the contact portion between the upper rear tongue piece 69 and the rear tongue piece 55 is the yarn to be described later when the upper yarn US is selected as the lower yarn DS to be supplied to the bobbin 22 during the thread winding operation. The upper thread rear holding part 70 is held on the supply side of the position restricting part 58.

  A hooking groove 71 substantially the same as the hooking groove 68 is formed on the rear edge of the threading plate spring 66 in the upper hooking groove 68 shown in FIG. 9 protrudes toward the back side shown in the upper part of FIG. 9 and, as shown in FIG. 10, a thread hooking tongue piece 72 that is bent and extended so as to incline upwards is formed adjacently. . The thread hooking tongue piece 72 functions as dedicated thread tension applying means 296 for applying tension to the lower thread dedicated thread EDS supplied to the bobbin 22 during the thread winding operation. The lower inner thread when the lower inner thread EDS is selected as the lower thread DS to be supplied to the bobbin 22 during the thread winding operation is the inner side of the contact portion between the thread hooking tongue piece 72 and the upper surface of the thread holding / capturing section 49. The dedicated thread EDS is a dedicated lower thread rear holding section 73 that holds the dedicated thread EDS on the supply side of the thread position regulating section 58 described later.

  9 protrudes toward the front side shown in the lower part of FIG. 9 on the left side of the upper rear tongue piece 69 of the thread holding leaf spring 66 and is inclined upward as shown in FIG. The bent front tongue piece 57 is formed substantially parallel to the upper rear tongue piece 69 with an appropriate interval. 9 is located on the supply side of an upper thread holding part 59 and an upper thread locking part 60, which will be described later, at the time of the thread winding operation. The upper thread US supplied as EDS or lower thread DS is a thread position restricting portion 58 that positions the upper thread US so as to be able to contact the upper flange 37 of the bobbin 22.

  The front end side of the thread holding leaf spring 66 shown on the left side of FIG. 9 has a front end edge shown on the lower side of FIG. 9 formed in a straight frontal substantially horizontal L shape, and the corner shown on the lower left side of FIG. A thread holding plate spring tip 74 is provided. The leading edge shown on the left side of FIG. 9 of the thread holding leaf spring 66 is, as shown in FIG. 9, the rear edge shown on the right side of FIG. 9 from the leading end 74 of the thread holding leaf spring toward the rear edge on the upper side of FIG. 9 is formed at an inclination toward the end edge, and a convex portion 75 convex upward in FIG. 9 is formed at a portion overlapping the front horizontal portion 62a of the yarn holding and catching portion 49 in the middle thereof. Has been. Further, the tip side part from the thread holding plate spring tip 74 to the convex portion 75 is bent and extended so as to incline upward toward the tip side as shown in FIG. The lower thread DS supplied when the crossing portion of the lower end edge of the thread retaining leaf spring 66 shown in the lower part of FIG. 9 and the leading edge of the thread retaining / capturing portion 49 is positioned at the approach position described later during the thread winding operation. The upper thread US as the upper thread locking portion 60 that can be captured and locked so as to be positioned above the upper flange 37 of the bobbin 22 is formed as an upper thread locking portion 60. When the abutting portion with the upper surface of the portion 49 is positioned at an approach position, which will be described later, during thread winding operation, the supplied lower thread dedicated thread EDS can be held so as to be positioned above the upper flange 37 of the bobbin 22. This is an upper thread holding portion 59.

  In the present embodiment, the yarn holding member 48 that can be held or caught even when either the lower yarn dedicated yarn EDS or the upper yarn US is selected as the lower yarn DS supplied to the bobbin 22 is used. In the case where only the lower thread dedicated thread EDS is supplied as the lower thread DS supplied to the bobbin 22, only the thread position restricting portion 58, the upper thread holding portion 59, and the dedicated lower yarn rear holding portion 73 may be provided. . When only the upper yarn US is supplied as the lower yarn DS supplied to the bobbin 22, the yarn position regulating portion 58, the upper yarn locking portion 60, the upper yarn rear holding portion 70, and the dedicated yarn tension applying means 296 are provided. It is good also as a structure which has only.

  Returning to FIG. 2, the yarn holding member moving means 53 advances or retracts at least the tip of the yarn holding member 48 between the retracted position and the entering position, and protrudes from the attachment surface 50 a of the yarn holding member 48. The front mounting pin 51 and the rear mounting pin 52 are provided with a moving groove 76 through which they are inserted. The moving groove 76 is formed in the vicinity of the upper portion of the standing portion 77a of the mechanism base 77 having a substantially L-shaped cross section fixed to the base frame 33, and the longitudinal direction shown on the left side of FIG. A long hole-shaped horizontal portion 76a formed and a rear end side of the horizontal portion 76a shown on the right side in FIG. 2 are connected to a substantially central portion in the longitudinal direction located in the vertical direction and projecting toward the rear end side. The upper and lower portions 76b are formed in a substantially arc shape. The front mounting pin 51 and the rear mounting pin 52 are inserted into the moving groove 76 so that the front ends protrude toward the front side, and a retaining ring 78 is attached to the front end of the front mounting pin 51 and the rear mounting pin 52, respectively. By attaching, the thread holding member 48 is attached to the mechanism base 77. That is, the movement track of the yarn holding member 48 can be regulated by the movement groove 76. Further, the upper and lower portions 76b regulate a movement locus when the yarn holding member exposing means 261 causes at least the yarn holding portion of the yarn holding member 48 to protrude outside the sewing machine during the yarn hooking operation of the lower yarn dedicated yarn FDS described later. Be able to.

  A flat drive plate lower 79 is disposed in parallel at an appropriate interval on the lower right side of the upright portion 77a of the mechanism base 77 in FIG. The front ends of a pair of front and rear guide pins 80 (only one shown) projecting on the back surface of the lower 79 shown in the back side of FIG. The guide groove 81 is inserted through the guide groove 81 formed so as to extend in parallel, and a retaining ring 82 is attached to the tip of the guide pin 80 in a known manner to move along the guide groove 81. It is supported freely.

  Further, on the upper right side of the upright portion 77 a of the mechanism base 77 in FIG. 2, a flat drive plate upper 83 is disposed in parallel at an appropriate interval, and the lower end of the drive plate upper 83 Is inserted through a guide rod 84 disposed on the right side of the upper end edge of the lower drive plate 79, and the biasing spring 85 is mounted on the outer peripheral surface of the guide rod 84 on the rear end side shown to the right in FIG. Therefore, it is normally biased toward the tip side shown in the left side of FIG. A locking groove 86 is formed at the lower edge of the upper drive plate 83, and protrudes upward to the right of the guide rod 84 at the upper edge of the lower drive plate 79 with respect to the locking groove 86. By fitting the provided locking pin 87, it is possible to prevent the upper drive plate 83 from rotating about the guide rod 84. Further, on the drive plate 83, a cam surface 88 for moving the tip of the thread holding member 48 up and down along the large diameter portion 7a of the outer hook 7 is formed by moving the rear mounting pin 52 up and down. Therefore, the left side of FIG. 2 is formed with a cam groove 89 that extends diagonally from the upper left to the lower right of the opening, and the cam groove 89 is formed so that the tip of the rear mounting pin 52 can be fitted. Yes. A rack 90 that meshes with a pinion 92 attached to the output shaft of the drive motor 91 is formed at the lower end edge of the drive plate lower 79, and the drive plate lower 79 is guided by a guide groove by the rotation of the drive motor 91. 81. As a result, the thread holding member 48 can be moved forward and backward.

  Further, as shown in FIG. 2, the drive motor 91 of the yarn holding member moving means 53 is electrically connected to a control means 93 to be described later, and a predetermined command based on a control command sent from the control means 93 is provided. It is designed to be driven with timing.

  A shaft 251 is fixed to the back surface of the upright portion 77a of the mechanism base 77 on the back side in FIG. 2, and a body portion of the torsion coil spring 252 is attached to the shaft 251. Further, the distal end portion of the shaft 251 is formed to have a larger outer diameter than the portion where the body portion of the torsion coil spring 252 is attached, and the retaining portion prevents the torsion coil spring 252 from falling off the shaft 215. It has become. Further, the tip of one arm 252a shown to the left of FIG. 2 of the torsion coil spring 252 is hung on a through-hole 253 formed in the standing portion 77a of the mechanism base 77 in the plate thickness direction to prevent rotation. The tip of the other arm 252b of the torsion coil spring 252 shown in the right side of FIG. 2 is in contact with the back surface of the attachment portion 50 of the thread holding member 48 with a predetermined urging force. That is, as shown in FIG. 2, the yarn holding member 48 is normally biased to rotate counterclockwise in FIG. 2 around the front mounting pin 51 with the biasing force of the torsion coil spring 252. The tip of the member 48 is formed so as to be positioned at a lower retreat position near the outer peripheral surface of the outer hook 7.

  As shown in FIG. 2, a projecting mounting portion 260 projects from the upper end edge of the upright portion 77a of the mechanism base 77 so as to project upward. On the back surface of 260, a thread holding member exposing means 261 shown in FIG. As shown in FIG. 12, the thread holding member exposing means 261 has a fixed shaft 262 fixed to the back surface of the projecting mounting portion 260, and the fixed link 262 has one driven link body 263. A pair of retaining rings 265 (only one is shown) are rotatably attached in a state where they are positioned in the axial direction. A torsion coil spring 264 body is attached to the fixed shaft 262. The tip of one arm 264a of the torsion coil spring 264 shown in the lower part of FIG. 12 is hung on the upper edge of the standing portion 77a of the mechanism base 77 to prevent rotation, and the torsion coil spring 264 of FIG. The tip of the other arm 264b shown above is in contact with the driven link body 263 with a predetermined urging force. That is, the driven link body 263 is normally urged to rotate counterclockwise in FIG. 12 about the fixed shaft 262 by the urging force of the torsion coil spring 264, and the driven link body 263 is urged to the left in FIG. Is positioned obliquely upward to the left, and the operating arm 263b illustrated on the right side of the driven link body 263 in FIG. 12 is positioned substantially horizontally. Further, the distal end of the driven arm 263a is located on the movement locus of a protrusion 277 (FIG. 13) of the opening / closing cover 271 to be described later, and the lower end of the distal end of the operating arm 263b is always attached to the thread holding member 48. It is located at a position separated from the upper part so as to be able to contact the part 50 from above.

  It should be noted that the lower end of the operating arm 263b has a light contact force from above with respect to the attachment portion 50 of the thread holding member 48, that is, a twist that urges the thread holding member 48 to rotate counterclockwise in FIG. It is good also as a structure made to contact | abut with force weaker than the urging | biasing force of the coil spring 252.

  As shown in FIG. 13, at a desired position of the needle plate 5, the needle passage hole 272 penetrating in the plate thickness direction for the needle 3 to move up and down and the bobbin 22 in the plate thickness direction for extracting from the inside of the sewing machine. A bobbin extraction through-hole 273 is formed therethrough. In a portion of the needle plate 5 that constitutes a part of the sewing machine bed 1 b above the yarn holding member 48, the lower thread exclusive thread EDS is provided to a yarn holding portion located at least on the tip side of the yarn holding member 48. A substantially rectangular opening 274 used when threading the lower thread dedicated EDS to be threaded onto the thread holding member 48 is provided. The opening 274 slides forward and backward to open and close the opening 274. An opening / closing cover 271 formed so as to be movable is disposed. The upper surface of the opening / closing cover 371 is substantially flush with the upper surface of the needle plate 5. A finger hook 275 is formed in the vicinity of the front end portion of the opening / closing cover 271 shown in the left side of FIG. Further, the opening / closing cover 271 is opened at the rear portion of the opening / closing cover 271 of the needle plate 5 shown in the right side of FIG. 13 when the opening / closing cover 271 is slid to the right of FIG. A recess 276 is formed to be supported from below. Further, below the corner of the opening / closing cover 271 shown in the lower left part of FIG. 13, when the opening / closing cover 271 is retracted, the driven arm 263 a of the driven link body 263 of the thread holding member exposing means 261 is driven. A protruding portion 277 is formed as a yarn holding member expression driving means. Furthermore, in the vicinity of the rear end portion of the needle plate 5 in the closed state of the opening / closing cover 271 shown in FIG. 13, a lower thread fed out from a lower thread yarn piece 111 (FIG. 16) around which a lower thread dedicated thread EDS described later is wound. A groove portion 278 that is a yarn hooking groove for guiding the yarn dedicated thread EDS into the opening portion 274 is formed along a direction orthogonal to the longitudinal direction of the opening portion 274.

  That is, in the present embodiment, the protrusion 277 as the thread holding member exposing drive means drives the thread holding member exposing means 261 in conjunction with the opening / closing operation of the opening / closing cover 271 that can open and close the opening 274. It can be done.

  More specifically, the projecting portion 277 contacts the driven arm 263a while the opening / closing cover 271 is retracted to the right in FIG. The driven link body 263 urged counterclockwise about the fixed shaft 262 by the urging force of H.264 is rotated clockwise against the urging force of the torsion coil spring 264 to actuate the operating arm of the driven link body 263. The lower portion of the tip of the H.263b abuts against the attachment portion 50 of the yarn holding member 48 from above at a predetermined timing, and is urged so as to rotate counterclockwise about the front attachment pin 51. Is rotated clockwise against the urging force of the torsion coil spring 252, and as a result, the thread holding portion provided on the tip end side of the thread holding member 48 is passed through the opening 274. So that the it can be positioned in the thread hook position protruding into the sewing machine outside by.

  Note that the movement trajectory of the tip of the yarn holding member 48 is regulated by the upper and lower portions 76b of the movement groove 76 as described above.

  In addition, the thread hooking position is, for example, the opening 274 as long as it is a position near the opening 274 where the operator can thread the lower thread exclusive thread EDS onto the thread holding portion of the thread holding member 48 with his / her finger. Or the same surface position as the surface of the needle plate 5 of the opening 274, and is not particularly limited to the threading position of the present embodiment. This threading position may be selected according to the design concept or the like.

  As shown in FIG. 3, a bobbin driving member moving means 94 is disposed below the bobbin driving member 11. The bobbin driving member moving means 94 has a working plate 95 formed in a substantially L-shaped plane located below the bobbin driving member 11. As shown in FIGS. 2, 3 and 14, a gear connection link 96 is connected to the rear end portion of the operation plate 95 shown on the right side of FIG. 3. A link support pin 97 erected in the vicinity of the lower left corner of the mechanism base 77 in FIG. 2 is inserted so as to protrude to the front side in FIG. The gear connection link 96 is attached to the mechanism base 77 so as to be rotatably supported around the link support pin 97 by the retaining ring 98 attached to the tip end side of the link support pin 97. ing. Further, as shown in FIG. 14, the operating plate 95 is always counterclockwise around the link support pin 97 by the spring 6 having one end locked to the operating plate 95 and the other end locked to the base frame 33. In addition to being biased, the counterclockwise rotation of the operating plate 95 around the link support pin 97 causes the lower end surface of the gear connection link 96 to abut the positioning pin 99 protruding from the mechanism base 77. As a result, the operating plate 95 is normally separated below the bobbin driving member 11, and the bobbin driving gear 14 disposed at the upper end of the bobbin driving member 11 is in the gear hole of the outer pot bottom plate 16. 17, and the bobbin driving gear 14 can hold a separated position away from the bobbin driven gear 35.

  As shown in FIG. 14, a convex arcuate groove 100 is formed on the lower right side of the gear coupling link 96, and extends substantially vertically in the lower left side of the arcuate groove 100. An existing contact edge 100A is formed. The contact edge 100A has a substantially bell crank-shaped stopper 103 attached to a support pin 101 erected on the lower right side of the link support pin 97 of the mechanism base 77 by a retaining ring 102 so as to be rotatable. A stopper pin 105 disposed so as to penetrate the operating arm 104 in the plate thickness direction can be brought into contact therewith. A drive arm 106 shown on the left side of the stopper 103 in FIG. 14 is provided with a spring 107 having one end locked to the drive arm 106 and the other end locked to the base frame 33. Normally, the spring 107 is urged counterclockwise by the urging force of the spring 107, and is urged toward the contact edge 100A formed substantially downward in the lower left direction of the arc-shaped groove portion 100. Further, on the right side of the upper end edge of the gear connection link 96 in FIG. 14, an operating pin 108 protruding from the back surface of the lower drive plate 79 shown in FIG. An inclined cam surface 109 is formed, and the operating pin 108 contacts the inclined cam surface 109 while the drive plate lower 79 moves forward toward the forward side shown in the left side of FIG. The gear connecting link 96 urged counterclockwise as the center is rotated clockwise against the urging force of the spring 6, and as a result, the tip of the operating plate 95 is raised at a predetermined timing, and the bobbin The bobbin driving member 11 is brought into contact with the driving member 11 to raise the bobbin driving member 11, and the bobbin driving gear 14 disposed at the upper end of the bobbin driving member 11 is raised to mesh with the gear hole 17 of the outer pot bottom plate 16. Gear 14 is attached to outer pot bottom plate 16 By mesh with both the gear bore 17 and the bobbin driven gear 35, so that the can be positioned in the connecting position obtained by connecting the bobbin driving member 11 and the bobbin 22.

  Further, the operating pin 108 abuts on the inclined cam surface 109 while the drive plate lower 79 moves forward toward the forward side shown in the left side of FIG. 2 and is urged counterclockwise around the link support pin 97. When the gear connecting link 96 is rotated clockwise against the urging force of the spring 6, the stopper pin 105 urged counterclockwise by the urging force of the spring 107 is applied to the groove bottom 100 a of the arcuate groove 100. It is designed to engage with each other. Furthermore, the stopper pin 105 fitted to the groove bottom 100a of the arcuate groove 100 is in the middle of movement of the lower drive plate 79 from the forward end shown on the left side of FIG. 2 to the backward end shown on the right side of FIG. By contacting a substantially inverted L-shaped stopper pin operating arm 159 disposed so as to protrude from the tip end of the lower 79, the operating pin 108 is separated from the groove bottom 100a of the arc-shaped groove 100, and the operating pin 108 is inclined cam surface. The contact edge 100 </ b> A formed on the lower left side of the arc-shaped groove portion 100 by the counterclockwise rotation of the gear coupling link 96 that is spaced apart from 109 and biased counterclockwise by the biasing force of the spring 6. It comes to oppose.

  Therefore, the stopper pin 105 in the present embodiment maintains the state separated from the arcuate groove 100 when the lower drive plate 79 shown in FIG. 2 is positioned at the retracted end shown on the right side of FIG. The bobbin 22 can be held at the separated position, and when the lower drive plate 79 shown in FIG. 2 is positioned at the forward end shown on the left side of FIG. Thus, the bobbin driving member 11 and the bobbin 22 can be held at the coupling position.

  That is, the bobbin driving member moving means 94 is formed so as to operate in conjunction with the yarn holding member moving means 53.

  The bobbin driving member moving means 94 may be driven by another independent driving motor.

  The bobbin driving gear 14 and the bobbin driven gear 35 constitute a rotational transmission mechanism 340 that connects the bobbin driving member 11 and the bobbin 22 of this embodiment so as to be able to contact and separate.

  Instead of the rotation transmission mechanism 340 formed by the bobbin driving gear 14 and the bobbin driven gear 35, as shown in FIG. 15, the rotation formed by the substantially conical bobbin driving friction wheel 14A and the bobbin driven friction wheel 35A. The transmission mechanism 340 may be used. In this case, instead of forming the gear hole 17 in the shaft center portion of the outer hook bottom plate 16, the rotation of the outer hook bottom plate 16 is performed with the bobbin driving friction wheel 14A and the bobbin driven friction wheel 35A being connected. What is necessary is just to form the transmission hole 17A penetrated in the plate | board thickness direction which can be transmitted to the vehicle 14A.

  That is, the rotation transmission mechanism 340 may be selected from various configurations capable of coupling the bobbin driving member 11 and the bobbin 22 with an eccentric shaft as necessary according to the design concept or the like.

  Next, an example of a dedicated lower thread feeding mechanism used when supplying a lower thread dedicated thread as a lower thread to be supplied to the bobbin will be described with reference to FIG.

  The dedicated lower thread feeding mechanism 110 when supplying the lower thread dedicated thread EDS as the lower thread DS supplied to the bobbin 22 according to the present embodiment has an appropriate tension for the lower thread dedicated thread EDS wound around the bobbin 22 during the thread winding operation. It is for granting. At least before starting the thread winding operation, the lower thread yarn piece 111 wound with the lower thread dedicated thread EDS is moved to the left front of the sewing machine leg 1d of the sewing machine bed 1b as shown in FIG. A bobbin thread spool mounting bar 168 capable of storing the bobbin thread spool 111 in a close position is rotatably supported by a lower thread stand rod 117 erected with its tip facing upward, so that the thread winding operation can be performed. At the start, as shown in FIG. 16, the bobbin thread dedicated EDS fed out from the bobbin thread piece 111 rotatably supported by the lower thread stand rod 117 shown in FIG. The thread holding member 48 is threaded so that the thread end side is held through the lower thread guide 118 and the groove part 278 which is a thread hooking groove, and the dedicated lower thread feeding mechanism 110 located on the supply side shown in FIG. .

  Note that the lower thread thread piece mounting portion 168 in which the lower thread thread piece 111 is disposed is such that the embroidery frame 239 of the embroidery device 240 is located at the retracted position furthest away from the sewing machine column 1d shown on the left side of FIG. In this case, the lower thread thread piece 111 can be attached / detached from the outside of the sewing machine, in other words, at a position where at least the embroidery frame 239 of the embroidery device 240 can be attached / detached (exchanged) without attaching / detaching the lower thread thread piece 111 If present, the position may be inside the sewing machine, outside the sewing machine, or a part of the sewing machine.

  As shown in FIG. 16, the dedicated lower thread feeding mechanism 110 has a lower thread tension pin 112 supported by a mounting stay (not shown), and a movable tray 113 is lowered on the outer peripheral surface of the lower thread tension pin 112. It is arranged so as to be movable along the thread tension pin 112. A fixed plate 114 is disposed at the lower end of the lower thread tension pin 112 so as to face the movable plate 113. Further, a lower thread tension spring 115 is extrapolated on the outer peripheral surface of the lower thread tension pin 112. The lower end of the lower thread tension spring 115 is brought into contact with the upper surface of the movable plate 113 and the lower thread tension spring 115. The movable plate 113 can always be biased toward the fixed plate 114 by bringing the upper end of the lower plate into contact with the lower surface of the retaining ring 116 attached in the vicinity of the upper end of the lower thread tension pin 112. That is, the lower thread dedicated thread EDS is sandwiched between the fixed dish 114 and the movable dish 113 by the urging force of the lower thread tension spring 115.

  Next, an example of an upper thread feeding mechanism used when an upper thread is supplied as a lower thread to be supplied to a bobbin will be described with reference to FIG.

  The upper thread feeding mechanism 120 of the present embodiment is suitable for the upper thread US fed from the upper thread spool 121 during the sewing operation and when the upper thread US is supplied as the lower thread DS to be supplied to the bobbin 22. In addition, the upper thread US is fed at an appropriate timing when the thread is tightened by a well-known balance mechanism (not shown) after the upper thread US is fed out as much as necessary to form the seam during sewing operation. When a thread winding operation is performed, an appropriate timing is set when a balance thread is tightened by a known balance mechanism (not shown) after the upper thread US is fed out by an amount necessary for locking the upper thread US to the thread holding member 48. The upper thread US is held at the start and the upper thread US held at the start of the thread winding operation for winding the upper thread US as the lower thread DS to be supplied to the bobbin 22 during the thread winding operation. It is intended to release a positive timing.

  As shown in FIG. 17, the upper thread feeding mechanism 120 has a driving roller 124 that is rotatably supported by a driving roller support shaft 123 erected on the upper surface of the mounting plate 122. Then, the upper thread US fed from the upper thread spool 121 that is rotatably supported by an upper thread standing rod (not shown) via the upper thread tension applying device 119 is wound around a part of the outer peripheral surface of the drive roller 124. It is in contact with. The lower end of the drive roller 124 is fixed to the front end of the output shaft 125a that protrudes above the mounting plate 122 of the drive motor 125 made of a stepping motor or the like attached to the lower surface of the mounting plate 122. A driven gear 127 that meshes with the drive gear 126 is formed coaxially. As a result, the drive roller 124 can be rotated by the rotation of the drive motor 125.

  On the outer peripheral surface of the drive roller 124, a pair of driven rollers 128 that come in contact with and separate from the outer peripheral surface of the drive roller 124 via an upper thread US wound around and in contact with a part of the outer peripheral surface of the drive roller 124. They are arranged in parallel at intervals. Each of these driven rollers 128 is rotatably supported by a driven roller support shaft 130 erected on the upper surface of a moving plate 129 disposed above the mounting plate 122. The moving plate 129 is formed with a long hole 131 penetrating in the thickness direction in which the driving roller 124 can be fitted. By fitting the long hole 131 to the outer peripheral surface of the driving roller 124, The lower surface of the moving plate 129 is supported on the upper surface of the driven gear 127. Further, in the vicinity of the left end portion of the moving plate 129 shown on the left side of FIG. 14, it can be rotated by a link support pin 132 which is formed in a substantially bell crank shape and whose longitudinal central portion is erected on the upper surface of the mounting plate 122. One end of the movable plate drive link 133 supported by the lower end of FIG. 17 is pivotally attached by a connecting pin 134, and the movable plate drive link 133 is rotated around the link support pin 132. Thus, the moving plate 129 moves forward and backward in a state in which the movement locus is restricted by the long hole 131 that fits around the outer peripheral surface of the driving roller 124, and as a result, each driven roller 128 passes through the upper thread US. It is made to contact / separate to the outer peripheral surface.

  Further, one end of an urging spring 135 is locked in the vicinity of the other end of the moving plate driving link 133 shown in the upper part of FIG. 17, and the urging force of the urging spring 135 is always the moving plate driving link 133. 17 is urged counterclockwise about the link support pin 132 to move the moving plate 129 forward to the right in FIG. 17 so that each driven roller 128 comes into contact with the drive roller 124 with a predetermined contact force. As a result, a predetermined upper thread tension can be applied to the upper thread US. Further, as indicated by a broken line in FIG. 17, the drive motor 125 is electrically connected to control means 93 described later, and the drive roller 124 is driven at a predetermined timing based on a control command sent from the control means 93. Is rotated to feed the upper thread US by a set amount.

  That is, the driven thread 128 is brought into contact with the drive roller 124 without rotating the drive motor 125, so that the upper thread US is held, and the drive motor 125 is rotated in this held state. By driving, the upper thread US can be fed out by a set amount while a predetermined upper thread tension is applied.

  Near the other end of the moving plate drive link 133 shown in the upper part of FIG. 17 is the other end of the drive rod 137 with one end attached to an output shaft 136a of a solenoid 136 attached to a support stay (not shown). It is locked. The output shaft 136a of the solenoid 136 is normally in a state in which each driven roller 128 abuts against the driving roller 124 by the biasing force of the biasing spring 135 to apply a predetermined upper thread tension to the upper thread US. It is in the forward position where it can be held. The solenoid 136 is electrically connected to the control means 93, which will be described later, as indicated by a broken line in FIG. 17, and the output of the solenoid 136 at a predetermined timing based on a control command sent from the control means 93. By locating the shaft 136a from the forward movement position to the backward movement position, the urging spring 135 is extended so that each driven roller 128 is separated from the driving roller 124, so that the held upper thread US can be released. It has become.

  The solenoid 136 and the drive rod 137 release the held upper yarn US at an appropriate timing at the start of the yarn winding operation for winding the upper yarn US as the lower yarn DS supplied to the bobbin 22 during the yarn winding operation of the present embodiment. A thread loosening means 138 is configured.

  Further, the upper thread US as the lower thread DS is given an appropriate tension by the upper thread tension applying device 119 between the upper thread spool 121 and the upper thread feeding mechanism 120, and the upper thread US It is possible to remove the runaway of the yarn when entering the feeding mechanism 120 and to give the necessary tension to the spool.

  The upper thread US fed from the upper thread feeding mechanism 120 is formed so as to reach the needle 3 via a known upper thread tension spring 220 disposed in the upper thread path. The upper thread tension spring 220 is formed so as to interlock with a substantially fan-shaped shielding plate 222 that constitutes a part of the upper thread detection means 221 that detects the presence or absence of the upper thread US. When the sewing operation is being performed, the upper thread detecting means 221 has a light shielding sensor (photo interrupter) that is connected to the upper thread tension spring 220 bent by the upper thread tension applied to the upper thread US. ) The presence or absence of the upper thread US can be detected by shielding and releasing 223.

  The shielding plate 222 and the light sensor 223 constitute the upper thread detection means 221 of this embodiment.

  Next, an example of the needle bar cutting mechanism will be described with reference to FIG.

  The needle bar cut-off mechanism of this embodiment utilizes the one described in Japanese Patent Application Laid-Open No. 58-183191, and a detailed description of the configuration is omitted, and only the main part is described.

  As shown in FIG. 18, in the needle bar cut-off mechanism 140 of this embodiment, the needle bar 2 is supported so as to reciprocate in the needle bar gate 141 in the vertical direction, and the needle bar gate 141 is a sewing head. e (FIG. 1) The upper bearing 144 of the needle bar gate 141 is engaged with the spherical socket part 143 at the upper part of the bracket 142 mounted inside, and the needle bar 2 extends along the groove 145 at the lower part of the needle bar gate 141. Thus, it is formed so that it can swing back and forth in a zigzag direction. When the reciprocating motion in the vertical direction of the needle bar 2 that reciprocates in the vertical direction in conjunction with the upper shaft (not shown) during the thread winding operation is disconnected from the rotation of the upper shaft, the control means 93 (described later) The finger piece 147 of the bracket 146 at the top end of the needle bar gate 141 is driven by a solenoid or the like (not shown) based on the control command sent at this timing, and is attached to the elongated thin metal plate 148 and the needle bar carrier 149. If the wedge 151 is removed from the notch 155 in the drive stud hinge pin 154 via the wedge 151, the cam finger piece 152, the drive stud 153, the drive stud hinge pin 154, etc. of the latch member 150, and the needle bar 2 is separated from the drive stud 153. The tension spring 156 is formed so as to lift the needle bar 2 to its uppermost position.

  As the needle bar cutting mechanism 140, the needle bar 2 that reciprocates in the vertical direction in conjunction with the upper shaft is removably moved in the vertical direction from the rotation of the upper shaft during the thread winding operation. For example, the one that can hold the needle 3 upward by stopping the reciprocating motion in the vertical direction, such as that described in Japanese Utility Model Publication No. 2-36455, may be used.

  Further, the needle bar mechanism for reciprocating the needle bar 2 in the vertical direction in conjunction with the upper shaft is a conventionally known one and will not be described.

  Next, an example of the bobbin diameter detecting means will be described with reference to FIGS.

  The thread winding diameter detecting means 160 of this embodiment is for detecting the maximum thread winding diameter of the lower thread DS wound around the bobbin 22.

  As shown in FIGS. 19 and 20, the bobbin diameter detecting means 160 of the present embodiment includes a light emitting element 161 and a light receiving element which are disposed so as to face each other in the vicinity of the upper end of the large diameter portion 7 a of the outer hook 7. 162. An optical path 163 from the light emitting element 161 to the light receiving element 162 is located above the outer hook 7, and between the upper flange 37 and the lower flange 38 of the bobbin 22, the lower thread indicated by a broken line in FIG. The maximum bobbin diameter 164 of the DS can be detected. Further, the inner hook 18 is formed with an optical path hole (not shown) that coincides with the optical path 163 in a state where the inner hook 18 is in contact with the inner hook detent 20, and the outer periphery of the large-diameter portion 7 a of the outer hook 7. An optical path through hole (not shown) that coincides with the optical path 163 at a specific phase is formed on the surface.

  The specific phase referred to here is an optical path hole (not shown) formed in the inner hook 18 and an optical path through hole (not shown) formed on the outer peripheral surface of the large diameter portion 7a of the outer hook 7 linearly with the optical path 163. Matching phase. That is, the optical path 163 is opened only in this specific phase section. The light receiving element 162 is turned on in this specific phase section as long as the diameter of the yarn wound around the bobbin 22 does not block the optical path 163. When the yarn is wound and the yarn diameter blocks the optical path 163, the light receiving element is turned off. Since the optical path 163 is disposed at the maximum yarn diameter position, the maximum bobbin winding diameter 164 can be detected by the change in the signal of the light receiving element 162.

  In this embodiment, the bobbin rotation state detection unit 215 is used as the lower thread detection unit 214 for detecting the presence or absence of the lower thread UD. Instead of the bobbin rotation state detection unit 215, for example, a bobbin diameter detection is performed. Using the light emitting element 161 and the light receiving element 162 used as the means 160, the light emitting element 161 and the light receiving element 162 are arranged so that the optical path from the light emitting element 161 to the light receiving element 162 is slightly outside the outer periphery of the bobbin central axis 36 of the bobbin 22. May be used as a lower thread detecting means. With such a configuration, when the lower thread US wound around the bobbin 22 runs out, the light receiving element 162 detects the light from the light emitting element 161. This ON signal can be used as a detection signal for no lower thread.

  Next, an example of the operation unit will be described with reference to FIGS.

  As shown in FIG. 1, the operation unit 170 of the present embodiment is disposed on the front side which is the operation side of the sewing machine pedestal 1 d, and is stored in the control means 93 described later as shown in FIG. 21. A pattern display screen 171 for displaying a plurality of sewing data with simple patterns and numbers is arranged in the lower right of FIG. 21. Above the pattern display screen 171, the number of the pattern displayed on the pattern display screen 171. A pattern selection switch 172 is disposed as pattern selection means for selecting desired pattern sewing data from a plurality of pattern sewing data by selecting. On the left side of the pattern display screen 171, a winding thread setting switch 173 is disposed as a winding thread selecting means for selecting a lower thread dedicated thread EDS or an upper thread US as the lower thread DS to be supplied to the bobbin 22 during the thread winding operation. Above that, a bobbin winding amount setting switch 174 is arranged as a bobbin winding amount setting means for setting the bobbin winding amount of the lower thread DS wound around the bobbin 22 in three stages of large, medium and small during the bobbin operation. ing. Further, above the thread winding amount setting switch 174, a display screen 176 serving as a warning means 175 for displaying various messages and setting states and a restart notification means 225 for displaying the restart of the sewing operation is arranged. On the left side, a bobbin winding start / stop switch 177 for controlling ON / OFF of the bobbin winding operation is disposed. Further, the operation unit 170 includes a bobbin winding mode changeover switch 226 (FIG. 27) for switching between an automatic bobbin winding mode for automatically starting a bobbin winding operation and a manual bobbin winding mode for starting a bobbin winding operation by an operator. When the supply of the lower thread DS is terminated, a restart mode changeover switch 227 (for switching between an automatic restart mode in which the sewing operation is automatically restarted and a manual restart mode in which the sewing operation is restarted by the operator's operation) FIG. 27) is also provided. These pattern display screen 171, pattern selection switch 172, thread winding setting switch 173, thread winding amount setting switch 174, display screen 176 also serving as warning means 175, thread winding start / stop switch 177, thread winding mode changeover switch 226, The start mode changeover switch 227 and the like are a touch panel and are electrically connected to the control means 93 described later.

  It should be noted that the configuration of the operation unit 170 has been described only for the part related to the thread winding operation, and the operation unit 170 naturally includes various known switches and display screens (both not shown) related to the sewing operation. Has been placed.

  When only the lower thread dedicated thread EDS or the upper thread US is used as the lower thread DS supplied to the bobbin 22 during the thread winding operation, it is not necessary to provide the winding thread setting switch 173.

  Further, the restart notification means 225 may be configured to include not only the display on the display screen 176 but also a safety ensuring means 228 (FIG. 27) including a safety light such as a buzzer or a patrol light. Such safety ensuring means 228 can surely prevent the worker from overlooking the display of the message on the display screen 176, and can give warnings to surrounding people other than the worker. The safety ensuring means 228 may be attached to the sewing machine 1 with the lower thread winding device or may be individually installed outside.

  Next, an example of the dedicated lower thread holding detection means will be described with reference to FIGS. 16 and 22 to 24.

  As shown in FIG. 16, the dedicated lower thread holding detection unit 180 of the present embodiment is disposed between the thread holding member 48 and the dedicated lower thread feeding mechanism 110. As shown in FIGS. 22 to 24, the dedicated lower thread holding detection means 180 has a main body 181 formed in a substantially horizontally long rectangular shape, and the main body 181 includes a lower thread dedicated thread EDS. A thread groove 182 that is recessed along the thread path is formed. A pair of left and right guide ribs 184 having a substantially triangular plate shape for guiding the lower thread dedicated thread EDS passing through the thread groove 182 to the thread groove bottom portion 183 (FIGS. 23 and 24) is formed in the thread groove 182 at intervals. Has been. A through hole 185 (FIG. 22, FIG. 22) that penetrates in the vertical direction so as to be orthogonal to the lower thread dedicated thread EDS passing through the immediate vicinity of the thread groove bottom 183, 24) is formed, and a light emitting element 186 is disposed above the through hole 185. In addition, a light receiving element 187, for example, a solar cell is disposed below the through hole 185. The light emitting element 186 and the light receiving element 187 are electrically connected to the control means 93 to be described later, and send detection data to the control means 93 for the presence / absence of the lower thread dedicated thread EDS passing immediately adjacent to the thread groove bottom 182. Can be done.

  Next, an example of the cloth feed mechanism will be described with reference to FIGS.

  As shown in FIGS. 25 and 26, the cloth feed mechanism 310 of the present embodiment has a vertical feed mechanism 313, which is attached to a lower shaft 311 connected to the upper shaft. In addition, a vertical feed cam 314 having a substantially cylindrical shape is provided. The vertical feed cam 314 has a long groove 315 connected to one end shown on the right side of FIG. 26 on the inner peripheral surface thereof. By fitting the long groove 315 with a pin 316 protruding from the lower shaft 311, It can slide along the axial direction of the lower shaft 311. The vertical feed cam 314 includes a cam portion 317, a concentric circular portion 318 formed concentrically with the lower shaft 311, and a groove portion 319 formed in an annular shape. The groove portion 319 includes a drop feed operation plate 320. The plate portion 321 is engaged to regulate the thrust direction position of the vertical feed cam 314.

  In the vertical feed mechanism 313, when the lower shaft 311 rotates, the vertical feed cam 314 also rotates, and the contact 322 in contact with the cam portion 317 operates. The contact 322 is connected to a feed dog (not shown), and the feed dog moves up and down according to the cam shape of the cam portion 317. Further, a pair of back surface protruding pins 323a and 323b provided on the back surface of the drop feed operation plate 320 are respectively attached to a pair of long holes 324a and 324b provided in the sewing machine frame 1f by a retaining ring 325. Normally, the spring 326 is in contact with the left end of FIG. Then, when the solenoid 327 moves the drop feed operation plate 320 to the right in FIG. 26, the vertical feed cam 314 also moves to the right, and the concentric circle portion 318 of the vertical feed cam 314 comes into contact with the contact 322. Even if the lower shaft 311 rotates in this state, the contact 322 does not operate, so that the feed dog (not shown) can be kept below the upper surface of the throat plate 5, that is, in a drop-feed state. It has become.

  Next, an example of the control means will be described with reference to FIG.

  As shown in FIG. 27, the control means 93 has at least a CPU 190 and a memory 191 formed of a ROM, RAM, etc. of appropriate capacity. The control means 93 is arranged in the operation unit 170. Pattern display screen 171, pattern selection switch 172, thread winding setting switch 173, thread winding amount setting switch 174, display screen 176 also serving as restart notification means 225, thread winding start / stop switch 177, thread winding mode changeover switch 226, A start mode changeover switch 227, a start / stop switch 238 used for ON / OFF of a sewing operation, a spindle sensor 218, a reflection type optical sensor 211 of a lower thread detection means 214 that also serves as a bobbin rotation state detection means 215, and an upper thread detection means 221 The light sensor 223 forms the selected pattern An embroidery device sensor 217 for detecting the attachment / detachment state of the embroidery device 240 as an auxiliary part, a reverse stitching switch 301, a thread trimming switch 302, a sewing speed adjustment volume switch 303, a safety ensuring means 228 such as a buzzer and a safety light, an upper thread The drive motor 125 and solenoid 136 of the feeding mechanism 120, the cloth presser mounted on the presser mechanism (not shown) detects the thickness of the sewing product S from the height position 208, the sewing machine motor 235, the needle swing motor 236, a cloth feed motor 237, a Y motor 240A for vertical feed and a X motor 240B for horizontal feed, each of which includes a stepping motor of the embroidery device 240, and a solenoid 327 that causes the vertical feed mechanism 313 of the cloth feed mechanism 310 to perform a drop feed operation. , Related to the power switch (not shown) and sewing operation Various kinds of switches of knowledge are electrically connected. The reflection type optical sensor 211 is connected via an A / D converter 233, and includes a drive motor 125 and a solenoid 136 of a needle thread feeding mechanism 120, a sewing machine motor 235, a needle swing motor 236, a cloth feed motor 237, The drive motors 240A and 240B for the embroidery device 240 are connected via drive circuits 120a, 235a, 236a, 237a, 240a, and 327a, which are also called controllers for driving the embroidery devices 240.

  The CPU 190 also functions as sewing data recognition means 229 that recognizes at least selected pattern sewing data.

  The memory 191 includes at least a thread winding operation control unit 193, a lower thread re-holding operation control unit 194, an upper thread control unit 195, a lower thread tension applying operation unit 196, a thread winding amount control unit 197, and a limit thread winding number. A setting unit 198, a sewing data storage unit 200, an automatic setting unit 201, an erroneous winding operation preventing unit 202, a thread absence discrimination control unit 241, a sewing stop needle position control unit 242, and a sewing resumption needle position control unit 243, a bobbin winding mode determination control unit 244, a bobbin winding mode automatic setting control unit 245, a restart control unit 246, a restart operation control unit 247, a restart notification control unit 248, and an operation state determination control unit 249 And a malfunction prevention control unit 250.

  The bobbin winding operation control unit 193 includes a first bobbin winding operation control unit 193A and a second bobbin winding operation control unit 193B.

  When the lower thread dedicated thread EDS is selected as the lower thread DS to be wound around the bobbin 22 during the thread winding operation, the first thread winding operation control unit 193A is provided between the upper thread holding section 59 and the thread position regulating section 58. The needle bar detachment mechanism 140, the horizontal hook 4, the bobbin driving member moving means 94, and the thread holding unit so that the lower thread dedicated thread EDS is inserted into the slit 39 of the bobbin 22 and the lower thread dedicated thread EDS is wound around the bobbin 22. A program for operating the member moving means 53 is stored. As a specific example of this program, for example, the reciprocating motion of the needle bar 2 in the vertical direction is cut off from the rotation of the upper shaft, the reciprocating motion of the needle 3 in the vertical direction is stopped, and the needle 3 is held upward. Then, the thread holding member 48 is positioned at the entry position, and the lower thread dedicated thread EDS continuous between the upper thread holding part 59 and the thread position regulating part 58 is brought into contact with at least the outer peripheral edge of the upper flange 37 of the bobbin 22, and thereafter Then, after the bobbin driving member 11 is positioned at the connecting position, the outer hook 7 is rotated so that the lower thread dedicated thread EDS continuous between the upper thread holding part 59 and the thread position regulating part 58 enters the slit 39 of the bobbin 22. Therefore, the needle bar cutting mechanism 140, the horizontal hook 4, the bobbin driving member moving means 94, and the thread holding member moving means 53 may be operated so that the bobbin thread EDS is wound around the bobbin 22.

  Note that the program of the first thread winding operation control unit 193A is not limited to the above-described specific example, the timing at which the needle bar 2 is disconnected from the rotation of the upper shaft and the needle 3 is held upward, and the thread holding member 48. The timing of positioning the door to the entry position, the timing of positioning the bobbin driving member 11 to the connection position, the timing of rotating the outer hook 7 and the like may be determined according to the design concept and the like.

  When the upper thread US is selected as the lower thread DS to be wound around the bobbin 22 during the thread winding operation, the second thread winding operation control unit 193B drives the sewing machine 1 with the lower thread winding device to move the needle 3 up and down. The loop of the upper thread US is divided and rotated up and down the inner hook 18 by the sword tip 42 of the outer hook 7, and the upper thread US passing over the inner hook 18 is moved to the upper thread locking portion 60 and the thread position of the thread holding member 48. Then, the upper thread US connected between the upper thread locking section 60 and the thread position regulating section 58 is inserted into the slit 39 so that the upper thread US is wound around the bobbin 22 as the lower thread DS. A program for operating the needle bar cutting mechanism 140, the horizontal hook 4, the bobbin driving member moving means 94 and the thread holding member moving means 53 is stored. As a specific example of this program, for example, when the upper thread US is selected as the lower thread DS to be wound around the bobbin 22 during the thread winding operation, the thread holding member 48 is positioned at the entry position and the lower thread winding device is attached. The sewing machine 1 is driven to move the needle 3 up and down one time, and the upper thread US loop is divided up and down on the inner hook 18 by the sword tip 42 of the outer hook 7, and the upper thread US passing over the inner hook 18. Is captured by the upper thread locking portion 60 and the thread position restricting portion 58 of the thread holding member 48, and then the reciprocating motion of the needle bar 2 in the vertical direction is cut off from the rotation of the upper shaft, and the needle 3 is moved in the vertical direction. After the reciprocating motion is stopped and the needle 3 is held upward, the bobbin driving member 11 is positioned at the coupling position, and then the outer hook 7 is rotated to move between the upper thread locking portion 60 and the yarn position regulating portion 58. The upper thread US connected to is inserted into the slit 39 and Needle bar switching off mechanism 140 to take up as the lower thread DS in the US bobbin 22, horizontal holder 4, it may be configured to operate the first moving means 94 and the thread holding member moving means 53.

  Note that the program of the second bobbin winding operation control unit 193B is not limited to the above-described specific example, the timing at which the needle bar 2 is disconnected from the rotation of the upper shaft and the needle 3 is held upward, and the thread holding member 48. The timing at which the bobbin driving member 11 is positioned at the coupling position, the timing at which the outer hook 7 is rotated, and the like may be determined in accordance with the necessity of the design concept.

  In addition, as the bobbin winding operation control unit 193 when the bobbin thread exclusive thread EDS or the upper thread US is used as the bobbin thread DS wound around the bobbin 22, either the first bobbin winding operation control unit 193A or the second bobbin winding operation control unit 193B is used. Any configuration having either of these may be used.

  The bobbin thread re-holding operation control unit 194 positions the thread holding member 48 at the thread catching position after the bobbin winding operation is completed when the bobbin 22 is selected as the bobbin thread DS to be wound around the bobbin 22 during the bobbin winding operation. Then, the outer hook 7 is rotated to move the lower thread dedicated thread EDS located in the vicinity of the outer peripheral surface of the outer hook 7 in a direction away from the outer hook 7, so that the upper thread holding portion 59 of the thread holding member 48 moves to the upper thread holding portion 59. A program for operating the horizontal hook 4 and the thread holding member moving means 53 so as to move the thread holding member 48 to the retracted position after being held is stored.

  The upper thread control unit 195 includes a predetermined amount of the upper thread US fed from the upper thread feeding device 120 and a thread loosening means 138 when the bobbin 22 winds the upper thread US as the lower thread DS. Stores a program that operates to release the upper thread US. When only the lower thread dedicated thread EDS is used as the lower thread DS wound around the bobbin 22, a conventionally known one may be used as the upper thread feeding device 120.

  In the lower thread tension applying operation portion 196, the thread positioned near the outer hook 7 connected to the bobbin 22 is positioned at the retracted position so as to be positioned below the upper surface of the outer peripheral surface of the outer hook 7 after the bobbin winding operation is completed. After the thread catching hook 46 can catch the thread located near the outer hook 7 connected to the bobbin 22, the outer hook 7 is rotated in the reverse direction so that the thread located near the outer hook 7 connected to the bobbin 22 is removed. A program for operating the yarn holding member 48 and the outer hook 7 so as to enter the yarn introduction port 27 is stored. Further, in the lower thread tension applying operation unit 196 in the present embodiment, a program that reversely rotates the outer hook 7 by controlling the rotation direction of the sewing machine motor 235 is stored as the outer hook reverse rotation mechanism 205.

  When the thread winding amount setting switch 174 as a thread winding amount setting means sets the thread winding amount of the lower thread DS to the maximum setting value (large), the thread winding amount control unit 197 includes a thread winding diameter detection unit 160 that has a maximum thread winding diameter. Until the thread winding number measuring means 206 detects a limit thread winding number set by the limit thread winding number setting unit 198, and the thread winding amount set by the thread winding amount setting switch 174 is maximized. If it is smaller than the set value, the bobbin 22 winding speed is set in accordance with the bobbin winding amount set by the bobbin winding amount setting switch 174, and the bobbin winding number measuring means 206 detects the set bobbin winding speed. A program for performing the bobbin winding operation is stored.

  Further, the bobbin amount control unit 197 according to the present embodiment uses the reflection type light sensor 211 to detect the number of rotations of the bobbin 22 after the bobbin 22 starts the bobbin winding operation as the bobbin number measuring unit 206. A program for detecting the number of rotations of the bobbin winding is stored.

  The thread winding number measuring means 206 detects the rotation speed of the sewing machine motor 235 after the bobbin 22 starts the thread winding operation with an optical sensor (not shown), and the rotation speed of the sewing motor 235 at this time is stored in advance. It may be configured to detect the bobbin winding speed of the bobbin 22 by comparing with a table.

  When the limit winding number is not used as the thread winding amount control unit 197, when the thread winding amount of the lower thread DS is set to the maximum setting value (large) by the thread winding amount setting switch 174 as the thread winding amount setting unit, If the thread winding operation is performed until the thread winding diameter detecting means 160 detects the maximum thread winding diameter 164 of the lower thread DS wound around the bobbin 22, and the thread winding amount set by the thread winding amount setting switch 174 is smaller than the maximum set value, , A program for setting the bobbin winding speed of the bobbin 22 according to the bobbin winding amount set by the bobbin winding amount setting switch 174 and performing the thread winding operation until the bobbin speed measuring means 206 described later detects the bobbin 22 thread winding speed set Should be stored.

  The bobbin thread winding amount set by the bobbin winding amount setting switch 174 is set with reference to the middle thread. That is, as shown in FIG. 28, the amount of yarn wound around the bobbin 22 is controlled so that it does not protrude from the bobbin, and the diameter of the yarn wound around the bobbin 22 is managed. This is the maximum bobbin winding diameter (large) 164, and the bobbin winding is executed until the maximum bobbin winding diameter 164 is detected by the bobbin winding diameter detecting means 160. When the bobbin winding amounts (medium) and (small) are smaller than the maximum bobbin diameter (large) 164, the bobbin rotation speed is used. With respect to the number n of windings for winding up to the maximum bobbin winding diameter 164 with a medium thickness yarn shown in FIG. 28, the amount of winding (medium) is the number of windings (2/3) n, the amount of winding (small) ) Is reduced as the number of times of winding the thread (1/3) n. For this reason, the maximum thread winding diameter 164 at the thread winding amount (large) is the same diameter regardless of the thickness of the thread, but the thread thickness is the same at the thread winding amount (medium) and the thread winding amount (small). Therefore, the actual winding diameter of the yarn will be different. Although it is ideal to manage the winding amount of the lower thread DS according to the length of the yarn, the management of the winding amount of the lower thread DS by the length of the thread requires a complicated and expensive device. The amount of winding of the lower thread DS can be easily controlled to be close to ideal by managing the number of windings of the lower thread DS by the number of windings.

  28 and 29, the symbol na indicates the number of windings when the fine yarn is wound up to the maximum yarn winding diameter 164, and the symbol nb indicates the number of windings when the thick yarn is wound up to the maximum yarn winding diameter 164.

  Further, the winding amount may be set for each thickness of the thin yarn, the middle yarn, the thick yarn, etc. without setting the winding amount of the lower yarn DS based on the middle yarn. In this case, the operation unit 170 may be provided with a thread thickness selection means (not shown).

  The limit thread winding number setting unit 198 stores a limit thread winding number N. This limit thread winding number N will be explained. When a bobbin 22 is wound with a bobbin thread DS up to the maximum thread winding diameter 164 when a fine thread is used, the amount of thread wound around the bobbin 22 increases. In such a case, the lower thread DS cannot be used up. Therefore, as shown in FIG. 29, a limit thread winding number N (n <N <na) is set, and the thread winding is finished at the limit thread winding number N even if the maximum thread winding diameter 164 is not reached.

  It should be noted that the limit winding number may be set for each thickness of a thin thread, a middle thread, a thick thread, or the like.

  The sewing data storage unit 200 stores a plurality of pattern sewing data, for example, pattern sewing data of a wide variety of sewing patterns used for straight stitching, zigzag sewing, buttonhole sewing, etc., classified into categories called practical sewing. Pattern sewing data of a wide variety of sewing patterns used for embroidery sewing using an embroidery device 240 classified into a classification called embroidery sewing is stored, and cloth feed for forming seams by these sewing patterns Data during operation such as pitch, needle swing pitch, needle swing width, types of upper thread US and lower thread DS used according to the sewing pattern, types of lower thread DS supplied to the bobbin 22 during thread winding operation, and thread winding Various data such as the amount and the number of limit windings are also stored.

  The automatic setting unit 201 selects the lower thread DS to be supplied to the bobbin 22 according to the pattern data selected by the pattern selection switch 172 as the pattern selection unit of the operation unit 170, that is, the lower thread to be supplied to the bobbin 22. A program for selecting whether the lower thread dedicated thread EDS or the upper thread US is used as the thread DS and / or automatically setting the amount of winding of the lower thread DS supplied to the bobbin 22 is stored.

  That is, in the present embodiment, various settings can be automatically set according to the pattern data selected by the pattern selection switch 172 as the pattern selection means of the operation unit 170, and the various settings can be manually set. You can also do that.

  When the upper thread US or the lower thread dedicated thread EDS is used as the lower thread US during the thread winding operation, the automatic setting unit 201 excludes the part related to the selection of the lower thread DS to be supplied to the bobbin 22. A program that can automatically set various settings may be stored.

  The erroneous winding operation preventing unit 202 determines whether or not the setting state matches the state of the sewing machine 1 with the lower thread winding device, and the setting state matches the state of the sewing machine 1 with the lower thread winding device. If not, that is, when the dedicated lower thread holding detecting means 180 detects the lower thread dedicated thread EDS, the upper thread US is wound, and the dedicated lower thread holding detecting means 180 does not detect the lower thread dedicated thread EDS. In this case, a program for invalidating the thread winding operation of the lower thread dedicated thread EDS is stored. Further, when the bobbin winding operation is disabled, a warning is displayed on the display screen 176 of the operation unit 170 that also functions as the warning unit 175 with a message or the like, and the safety ensuring unit 228 including a buzzer, a safety light, etc. is driven. The program to do is also stored.

  The thread absence discrimination control unit 241 includes an upper thread US and a lower thread based on detection signals sent from the upper thread sensor 223 of the upper thread detection means 221 and the reflection type optical sensor 211 of the lower thread detection means 214 during the sewing operation. When the presence / absence of the yarn DS is monitored and the detection signal of no lower yarn by the reflection type optical sensor 211 of the lower yarn detection means 214 is sent before the detection signal of no upper yarn by the light sensor 223 of the upper yarn detection means 221 In this case, it is determined that there is no lower thread, and the upper thread detection signal from the upper thread sensor 223 of the upper thread detection means 221 is sent before the lower thread detection signal from the reflective optical sensor 211 of the lower thread detection means 214. A program for determining that there is no upper thread is stored. This is because when the bobbin thread DS decreases and the bobbin 22 is loosened from the bobbin 22, the bobbin 22 stops rotating, but the bobbin thread DS remains sandwiched between the bobbin thread tension means 25. Therefore, the upper thread US is entangled with each other, and the tension of the upper thread US is generated. Accordingly, the light sensor 223 (upper thread sensor) of the upper thread detecting means 221 in FIG. 17 outputs the presence of the upper thread. On the contrary, when the upper thread US is broken or consumed, no upper thread is output, but the lower thread DS is entangled with the upper thread US, so that the lower thread DS is pulled and bobbins during the cloth feeding operation. 22 rotates. In other words, it is possible to determine that the one that has detected the absence of yarn first is the absence of yarn. Such a yarn absence discrimination control unit 241 can simultaneously monitor the presence / absence of the upper yarn US and the lower yarn DS, and reliably and easily discriminates whether the upper yarn US or the lower yarn DS has been lost. can do. Furthermore, when the yarn absence determination control unit 241 determines that there is no lower yarn, the yarn winding operation can be easily started.

  When a detection signal indicating that there is no lower thread is sent from the reflective optical sensor 211 of the lower thread detection means 214 to the needle position control unit 242 during sewing operation, the needle position control unit 242 at the time of sewing interruption A program for stopping the sewing machine 1 with a bobbin thread winding device after moving a plurality of stitches from the sewing position is stored. This is because the bobbin thread DS still remaining on the bobbin 22 is consumed when the bobbin 22 stops. Such a sewing interruption time needle position control unit 242 can surely consume the remaining thread of the lower thread DS, and can start the thread winding operation after the remaining thread of the lower thread DS is reliably consumed, As a result, the thread winding operation can be easily automated.

  The needle position control unit 243 at the time of resuming the sewing restarts the sewing operation from the position where a plurality of stitches are returned from the sewing position when the bobbin 22 no bobbin thread DS is supplied to the bobbin 22 after the bobbin 22 is detected. The program to be stored is stored. Such a needle position control unit 243 at the time of resuming sewing can automatically return to the sewing position at the time when the detection signal of no lower thread is detected after supplying the lower thread DS to the bobbin 22, and can resume the sewing operation. As a result, workability can be improved reliably, and seams without fraying can be reliably formed.

  The thread winding mode determination control unit 244 stores a program for determining whether or not to perform a thread winding operation automatically based on the setting state of the thread winding mode changeover switch 226. Such a bobbin winding mode determination control unit 244 can easily select a bobbin winding operation mode according to the setting state of the bobbin winding mode changeover switch 226 operated by the operator. Further, the bobbin winding operation can be easily started in the mode set by the bobbin winding mode switch 226.

  The thread winding mode automatic setting control unit 245 attaches / detaches the embroidery device 240, which is an auxiliary part necessary for forming the pattern sewing data selected by the pattern selection switch 172 serving as a pattern selection means and / or the selected pattern. An automatic bobbin winding mode for automatically starting the bobbin thread DS winding operation based on a detection signal sent from the embroidery device sensor 217 for detecting the state, or a manual bobbin winding mode for starting the bobbin thread DS bobbin winding operation by the operator. Stores a program that automatically sets Such a thread winding mode automatic setting control unit 245 automatically sets the mode of the thread winding operation based on the selected pattern sewing data and / or the attachment / detachment state of the auxiliary component 240 necessary for forming the selected pattern. As a result, when performing practical sewing such as straight stitching, zigzag sewing, buttonhole sewing, etc., depending on the setting state of the thread winding mode switch 226, the type of lower thread DS can be changed or the lower thread DS The manual thread winding mode suitable for fine adjustment of the winding amount of the thread can be easily selected. When performing embroidery sewing, one type of lower thread DS is generally selected depending on the setting state of the thread winding mode switch 226. An automatic bobbin mode suitable for use can be easily selected. Furthermore, the thread winding operation can be easily started in the mode set by the thread winding mode automatic setting control unit 245.

  The restart control unit 246 stores a program for automatically restarting the sewing operation when the supply of the lower thread DS to the bobbin 22 is terminated by the thread winding operation. Since such a restart control unit 246 can automatically restart the sewing operation after the thread winding operation is completed, workability can be improved reliably.

  The restart operation control unit 247 stores a program for determining whether to restart automatically based on the setting state of the restart mode changeover switch 227. Such a restart operation control unit 247 can easily select a mode for restarting the sewing operation based on the setting state of the restart mode changeover switch 227. Furthermore, since the restart operation control unit 247 can easily restart the sewing operation in the mode set by the restart mode changeover switch 227 after the thread winding operation is completed, the workability can be improved with certainty. Can do.

  The restart notification control unit 248 stores a program for controlling the restart notification means 225 to operate before the supply of the lower thread DS to the bobbin 22 by the thread winding operation and restarting the sewing operation. Has been. When the safety ensuring unit 228 is added to the restart notification unit 225, the restart notification control unit 248 may operate both the restart notification unit 225 and the safety ensuring unit 228. Such a restart notification control unit 248 can easily and reliably operate the restart notification means 225 before restarting the sewing operation after the end of the thread winding operation, and as a result, restart the restart operation. The operator or the surrounding people can easily and reliably recognize the sewing operation. As a result, the worker or the surrounding people can easily and reliably recognize that the sewing operation is restarted. When starting, safety can be improved. Furthermore, the restart notification control unit 248 can improve the safety particularly when the restart is automatically performed.

  Based on the detection signal sent from the bobbin rotation state detecting means 215, the operation state determination control unit 249 determines whether or not the sewing state is normal during the sewing operation, and determines whether or not the thread winding is normal during the thread winding operation. Stores the program to be judged.

  The malfunction prevention control unit 250 stores a program for invalidating the thread winding operation during the sewing operation. Such an operation state determination control unit 249 can reliably and easily determine whether the sewing state and the thread winding state are normal and abnormal, and stops the sewing machine when an abnormality in the sewing operation and the thread winding operation is detected. As a result, safety can be improved.

  Further, the lower thread detection means 214 of the sewing machine 1 with the lower thread winding device of this embodiment also functions as a bobbin rotation state detection means 215 that detects the bobbin rotation state.

  Further, the malfunction prevention control unit 250 of the sewing machine 1 with the lower thread winding device of the present embodiment can surely prevent the start of the thread winding operation during the sewing operation, and as a result, ensure high safety. Can do.

  In the sewing machine 1 with the lower thread winding device of the present embodiment, the lower thread dedicated thread EDS and the upper thread US can be selected as the lower thread DS to be supplied to the bobbin 22, but the lower thread DS to be supplied to the bobbin 22 is selected. Only the lower thread dedicated thread EDS or the upper thread US may be used.

  Furthermore, in the sewing machine 1 with the bobbin thread winding device of the present embodiment, the opening 274 and the opening / closing cover 271 are disposed on the needle plate 5, but the thread holding member 48 of the sewing machine bed 1b in the horizontal direction or the like is placed when threading. It is good also as a structure which protrudes outside the sewing machine 1 in places other than the needle plate 5 which comprises a part, ie, the structure which provides the opening part 274 and the opening-and-closing cover 271 in the sewing machine bed 1b other than the needle plate 5. FIG.

  Furthermore, in the sewing machine 1 with the lower thread winding device of the present embodiment, the opening / closing cover 271 is provided with a protruding portion 277 as a thread holding member exposing drive means, and the protruding portion is interlocked with the opening / closing operation of the opening / closing cover 271. The thread holding member exposing means 261 is driven in conjunction with the driven arm 263a of the thread holding member exposing means 261, so that the driven arm 263a of the thread holding member exposing means 261 is moved to a reciprocating cylinder or the like. The actuator can be driven by the actuator, and the opening / closing state of the opening 274 due to the movement of the opening / closing cover 271 is detected by a sensor including a light sensor, a proximity switch, and the like, and the actuator is driven based on the detection signal of the sensor, thereby The holding member exposing means 261 may be driven in conjunction with the opening / closing operation of the opening / closing cover 271.

  Further, in the sewing machine 1 with the lower thread winding device of the present embodiment, the thread on the supply side is cut by the cutting blade 43 provided in the outer hook 7 after the end of the thread winding operation. It is good also as a structure which capture | acquires and cut | disconnects the wound thread | yarn.

  Further, in the sewing machine 1 with the lower thread winding device of the present embodiment, the thread retaining position is configured to move the thread retaining portion of the thread retaining member 48 to a position protruding from the needle plate 5. May be configured such that the thread holding portion moves to the thread hooking position near the surface of the needle plate, as long as the lower thread DS can be locked from the opening 274 with a finger. In this case, the opening 274 may be constituted by, for example, a U-shaped guide hole or a V-shaped guide long hole, instead of the opening 274 having a size for receiving a square finger.

  Furthermore, in the sewing machine 1 with the lower thread winding device of the present embodiment, when the upper thread US is used as the lower thread DS to be supplied to the bobbin 22, the thread cut out from the bobbin 22 and connected to the cloth after the end of the thread winding operation is cut. Is formed by the edge of the slit 39 formed in the upper flange 37 of the bobbin 22, but this thread cutting is performed by pressing the upper center of the bobbin 22 from above with a pressing member, and the pressing member and the upper flange of the bobbin 22 It is good also as a structure cut | disconnected by thread | yarn passing through between 37 repeatedly.

  Further, in the sewing machine 1 with the lower thread winding device of the present embodiment, the thread holding member 48 is moved by driving the drive motor 91 of the thread holding member moving means 53. However, the thread holding member 48 is manually moved. It is good also as a structure to which it moves.

  Further, in the sewing machine 1 with the lower thread winding device of the present embodiment, the dedicated lower thread holding detection means 180 for detecting the holding state of the lower thread DS is detected by the light emitting element 186 and the light receiving element 187. The lower thread holding detection means 180 may be configured to detect the tension of the lower thread DS.

  In the sewing machine 1 with the lower thread winding device of the present embodiment, the vertical movement of the needle bar 2 is connected to the rotation of the upper shaft, and the needle bar disconnecting mechanism 140 is configured to separate the upper shaft from the needle bar 2. However, the needle bar 2 may have a drive source that is independent of the vertical movement, and only the needle bar 2 can be stopped.

  Furthermore, in the present embodiment, the embodiment provided with the needle bar cutting mechanism 140 has been described. However, when only the lower thread dedicated thread EDS is used as the lower thread DS supplied to the bobbin 22, this needle bar cutting mechanism is used. Even if the removing mechanism 140 is not provided, the lower thread exclusive thread EDS can be wound around the bobbin 22 if the upper thread US in the upper thread path is removed at the time of thread winding.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  First, the bobbin winding operation that is the operation of supplying the bobbin thread DS to the bobbin 22 by the operation of the bobbin start / stop switch 177 in the sewing machine 1 with the bobbin thread winding device of the present embodiment will be described.

  The bobbin winding operation by operating the bobbin start / stop switch 177 in the sewing machine 1 with the bobbin thread winding device of the present embodiment is performed when the bobbin thread DS runs out during the sewing operation, or because the bobbin thread DS is wound around the sewing preparation. The empty bobbin 22 is set in the inner hook 18 and power is supplied to the sewing machine 1 with the lower thread winding device.

  The thread winding operation is started by selecting a pattern by operating the pattern selection switch 172 of the operation unit 170 shown in FIG. Then, by operating the pattern selection switch 172 to select a pattern, the automatic setting unit 201 selects the lower thread DS according to the pattern selected by the pattern selection switch 172 from various data stored in the sewing data storage unit 200. Automatically sets the amount of thread winding, winding thread, and thread winding operation. For example, for embroidery sewing, the thread winding amount is set to (large) and the winding thread is set to the lower thread dedicated thread EDS, etc. For linear sewing, the thread winding amount is set to (medium) and the winding thread is the upper thread US, etc. Set to. At this time, the control means 93 selects one of the first thread winding operation control unit 193A and the second thread winding operation control unit 193B as the control operation of the thread winding operation control unit 193, and various operations and operation sequences related to the thread winding operation. Also set.

  As described above, according to the sewing machine 1 with the lower thread winding device of the present embodiment, the winding amount of the lower thread DS wound around the bobbin 22 can be selected according to the sewing conditions. Furthermore, since the selection of the lower thread DS and the amount of winding of the lower thread DS can be automatically set according to the sewing pattern during the sewing operation, operations relating to the thread winding operation can be facilitated.

  The thread winding amount, the thread winding, etc. can be changed manually by operating the winding thread setting switch 173, the thread winding amount setting switch 174, etc., that is, can be set by manual operation.

  When the automatic setting or the manual operation is set, the erroneous winding operation preventing unit 202 determines whether the setting state matches the state of the sewing machine 1 with the lower thread winding device, and the setting state And the state of the sewing machine 1 with the bobbin thread winding device do not match, that is, when the dedicated bobbin thread holding detection means 180 detects the bobbin thread dedicated thread EDS, the thread winding operation of the upper thread US is performed. When the holding detection means 180 does not detect the lower thread dedicated thread EDS, the thread winding operation of the lower thread dedicated thread EDS is invalidated, and a warning is displayed on the display screen 176 of the operation unit 170 that also functions as the warning means 175. Then, the safety ensuring means 228 is driven. As a result, the erroneous winding operation preventing unit 202 prevents malfunction, and the warning unit 175 can make the operator easily recognize various warnings.

  When various settings are completed and the erroneous winding operation preventing unit 202 determines that the setting state matches the state of the sewing machine 1 with the lower thread winding device, the thread winding start / stop switch 177 is set. Operate and start winding.

  Thus, according to the sewing machine 1 with the lower thread winding device of this embodiment, the setting state of the thread winding operation and the state of the sewing machine can be matched, so that the lower thread that supplies the bobbin 22 with the lower thread exclusive thread EDS Forgetting to hook the lower thread dedicated thread EDS to the thread holding member 48 when used as a DS can be reliably prevented, and malfunction can be prevented in advance.

  In the case of automatic thread winding, the thread absence discrimination control is performed based on detection signals sent from the upper thread sensor 223 of the upper thread detection means 221 and the reflection type optical sensor 211 of the lower thread detection means 214 during the sewing operation. When the portion 241 determines that there is no lower thread, the sewing machine 1 with the lower thread winding device is stopped, and then the bobbin DS is wound on a predetermined condition.

  The sewing machine 1 with the lower thread winding device of the present embodiment selects and uses either the upper thread US or the lower thread dedicated thread EDS already threaded during the thread winding operation as the lower thread DS to be supplied to the bobbin 22. When the upper thread US is used as the lower thread DS to be supplied to the bobbin 22, the thread holding member 48 is not threaded and the thread holding member 48 is not allowed to have a thread. . Further, when the lower thread dedicated thread EDS is used as the lower thread DS to be supplied to the bobbin 22, the lower thread dedicated thread EDS is threaded to the thread holding member 48 via the dedicated lower thread feeding device 110 as shown in FIG. Hang it.

  Here, the threading operation of the bobbin thread dedicated thread holding member will be described with reference to FIGS. 12, 13, 16, 30, 31, and 32. FIG.

  FIG. 30 is a front view of an essential part showing an initial state of the sewing machine with a lower thread winding device according to the present invention, and FIG. 31 shows a state in which the thread holding member of the sewing machine with the lower thread winding device according to the present invention protrudes outside the sewing machine. FIG. 32 is a front view of the main part showing a state in which the thread holding member of the sewing machine with a lower thread winding device according to the present invention protrudes outside the sewing machine.

  As shown in FIGS. 13 and 30, in the initial state at the time of sewing operation or stop of the sewing machine 1 with the lower thread winding device of the present embodiment, the opening 274 provided in the needle plate 5 is formed by the opening / closing cover 271. The thread holding member 48 is closed and is located inside the sewing machine below the opening / closing cover 271. That is, as shown in FIGS. 13 and 30, the protruding portion 277 of the opening / closing cover 271 and the driven arm 263a of the driven link body 263 of the thread holding member exposing means 261 are separated from each other, and the driven link body 263 is As shown in FIGS. 13 and 30, the biasing force of the torsion coil spring 264 is biased so as to rotate counterclockwise about the fixed shaft 262, and the driven arm 263a of the driven link body 263 is tilted leftward. Located above, the operating arm 263b of the driven link body 263 is positioned substantially horizontally.

  Further, as shown in FIGS. 13 and 30, the yarn holding member 48 is positioned at the retracted position below the outer peripheral surface of the outer hook 7 by the yarn holding member moving means 53. is doing. That is, as shown in FIGS. 13 and 30, the lower drive plate 79 and the upper drive plate 83 of the yarn holding member moving means 53 are positioned at the retracted end shown on the right side, and the rear mounting pin 52 of the yarn holding member 48 is The tip of the yarn holding member moving means 53 is located above the upper and lower portions 76b of the moving groove 76 and abuts on the cam surface 89 near the tip of the cam surface 88 from above. Further, as shown in FIG. 30, the bobbin driving member 11 is located at a separation position where it is separated from the bobbin 22 by the bobbin driving member moving means 94 so that the bobbin 22 is not rotated. That is, when the lower drive plate 79 is located at the retracted end, the operating pin 108 of the bobbin driving member moving means 94 is separated from the inclined cam surface 109, and the gear connecting link 96 is linked by the biasing force of the spring 6 (FIG. 14). The actuating plate 95 is biased counterclockwise about the support pin 97, the operating plate 95 is separated below the lower end of the bobbin driving member 11, and the bobbin driving member 11 is directed downward by the biasing force of the bobbin driving member biasing spring 12. The bobbin driving gear 14 provided at the upper end of the bobbin driving member 11 is separated downward from the bobbin driven gear 35 and the rotational transmission mechanism 340 is disconnected, and the bobbin 22 does not rotate. The bobbin driving gear 14 is fitted in the gear hole 17 of the outer hook bottom plate 16 and rotates integrally with the outer hook 7. Further, the stopper pin 105 is in contact with the stopper pin operating arm 159 and is opposed to the contact edge 100 </ b> A formed on the lower left side of the arcuate groove 100.

  Here, when the operator operates the opening / closing cover 271, the yarn hooking operation of the bobbin thread EDS on the yarn holding member 48 is started. That is, the operator puts his / her finger on the finger hook 275 of the opening / closing cover 271 and moves the opening / closing cover 271 backward in the right direction in FIGS. 13 and 30, whereby the yarn dedicated to the lower thread EDS to the yarn holding member 48 is threaded. The hanging operation is started.

  When the operator puts his / her finger on the finger hook 275 of the opening / closing cover 271 and moves the opening / closing cover 271 backward as an opening operation of the opening / closing cover 271, the opening / closing cover 271 slides to the right in FIGS. An opening 274 provided on the plate 5 and closed by the opening / closing cover 271 is gradually opened from the left side. In the middle of the opening / closing cover 271 moving backward and reaching the retracted end, the protruding portion 277 provided as the thread holding member exposing drive means provided on the opening / closing cover 271 is a driven link body of the thread holding member exposing means 261. The driven link body 263 that abuts on the driven arm 263a of the H.263 and is biased to rotate counterclockwise about the fixed shaft 262 by the biasing force of the torsion coil spring 264 in the initial state is provided by the torsion coil spring 264. The rotation starts in the clockwise direction opposite to the urging direction against the urging force, and the lower end portion of the operating arm 263b of the driven link body 263 is viewed from above with respect to the attachment portion 50 of the thread holding member 48 at a predetermined timing. The rear mounting pin 52 of the thread holding member 48 that abuts and whose movement locus is regulated by the upper and lower portions 76b of the moving groove 76 moves the upper and lower portions 76b of the moving groove 76 downward from above. As a result, the thread holding member 48 biased to rotate counterclockwise around the front mounting pin 51 is biased against the biasing force of the torsion coil spring 252. Start rotation in the clockwise direction opposite to the direction.

  Next, when the opening / closing cover 271 further moves backward and reaches the retracted end, each part shown in FIG. 13 and FIG. 30 has an opening 274 blocked by the opening / closing cover 271 as shown in FIG. 31 and FIG. While being fully opened and in the open state, the protrusion 277 as the yarn holding member exposing drive means of the opening / closing cover 271 is positioned at the most retracted retracted end. Then, the movement of the protruding portion 277 to the retracted end rotates the driven link body 263 in the clockwise direction, and the lower end of the operating arm 263b of the driven link body 263 pushes down the attachment portion 50 of the thread holding member 48 to hold the thread. The member 48 rotates clockwise around the front mounting pin 51, the tip of the thread holding member 48 passes through the opening 274 provided in the needle plate 5, and protrudes outside the sewing machine above the needle plate 5, and the thread holding member Forty-eight yarn holding portions pass through the opening 274 and hold the yarn hooking position protruding to the outside of the sewing machine.

  Next, by threading the thread end side of the lower thread dedicated thread EDS that has been pre-threaded to the dedicated lower thread retention detecting means 180 on the thread holding member 48 as shown in FIG. 16, the lower thread dedicated thread EDS is retained. The threading operation on the member 48 is completed. At this time, the lower thread dedicated thread EDS is threaded onto the thread holding member 48 so as to enter the opening 274 through the groove 278 formed in the needle plate 5.

  When the threading of the bobbin thread EDS onto the yarn holding member 48 is finished, the opening / closing cover 271 is moved forward so as to close the opening 274 as a closing operation of the opening / closing cover 271, as shown in FIGS. 31 and 32. Each part returns to the original initial state shown in FIGS. 13 and 30 with the thread holding member 48 holding the yarn end side of the lower thread dedicated thread EDS and returns to the original initial state shown in FIGS. The bobbin 22 can be supplied at any time.

  As described above, according to the present embodiment, at least the yarn holding portion of the yarn holding member 48 can be exposed to the outside of the sewing machine in conjunction with the opening operation of the opening / closing cover 271. It is possible to enable the yarn EDS to be hooked onto the yarn holding member 48. Further, since at least the yarn holding portion of the yarn holding member 48 is exposed to the outside of the sewing machine, the lower yarn dedicated yarn EDS can be easily hooked onto the yarn holding member 48. That is, since at least the yarn holding portion of the yarn holding member 48 is exposed to the outside of the sewing machine, it is excellent in threading workability and operability. As a result, during the yarn hooking operation of the lower thread dedicated yarn EDS to the yarn holding member 48 The labor and time can be reliably reduced.

  The yarn holding member exposing means 261 may be configured to be independently drivable irrespective of the opening / closing operation of the opening / closing cover 271.

  Next, the winding operation of the bobbin thread will be described with reference to FIGS. 30 and 33 to 36. FIG.

  FIGS. 33 to 36 show the bobbin thread winding operation of the bobbin thread, FIG. 33 is a view similar to FIG. 30 showing the state before start of advancement, and FIG. 34 is a view similar to FIG. 35 is a plan view of FIG. 34, and FIG. 36 is a view similar to FIG.

  As shown in FIG. 30, in the initial state at the time of sewing operation or when the sewing machine 1 with the lower thread winding device of the present embodiment is being sewn or stopped, the thread holding member 48 is moved by the thread holding member moving means 53. The front end in the longitudinal direction is located at a lower retreat position near the outer peripheral surface of the outer hook 7. That is, the lower drive plate 79 and the upper drive plate 83 of the yarn holding member moving means 53 are positioned at the retracted end shown on the right side of FIG. 30, and the rear mounting pin 52 of the yarn holding member 48 is moved by the yarn holding member moving means 53. In a state where the groove 76 is located above the upper and lower portions 76 b, the tip end portion is in contact with the vicinity of the tip of the cam surface 88 of the cam groove 89 from above.

  Further, the bobbin driving member 11 is separated from the bobbin 22 by the bobbin driving member moving means 94 and is located at a separation position where the bobbin 22 is not rotated. That is, when the lower drive plate 79 is positioned at the retracted end, the operating pin 108 of the bobbin driving member moving means 94 is separated from the inclined cam surface 109, and the gear connection link 96 causes the link support pin 97 to be moved by the biasing force of the spring 6. It is urged counterclockwise as the center, the operating plate 95 is separated below the lower end of the bobbin driving member 11, and the bobbin driving member 11 is urged downward by the urging force of the bobbin driving member urging spring 12. The bobbin driving gear 14 provided at the upper end portion of the bobbin driving member 11 is separated downward from the bobbin driven gear 35, is fitted into the gear hole 17 of the outer hook bottom plate 16, and rotates integrally with the outer hook 7. Further, the stopper pin 105 abuts against the stopper pin operating arm 159 and opposes a contact edge 100 </ b> A formed on the lower left side of the arcuate groove 100.

  During the sewing operation, the upper thread US that rotates around the inner hook 18 passes through a gap formed by the bottom surface of the inner hook 18 and the upper surface of the bobbin drive gear 14.

  Next, the bobbin winding operation is started in a manual bobbin winding mode by operating the bobbin winding start / stop switch 177 or in an automatic bobbin winding mode by a bobbin winding signal. The automatic thread winding mode will be described later.

  When a control command is sent from the control means 93 to each section, first, it is determined whether or not the lower thread dedicated thread EDS supplied by the dedicated lower thread holding detection means 180 during the thread winding operation is held by the thread holding member 48. The detection result is sent to the control means 93, and the erroneous winding operation preventing unit 202 of the control means 93 determines whether or not the set state matches the state of the sewing machine 1 with the lower thread winding device. When the dedicated lower thread holding detection means 180 does not detect the lower thread dedicated thread EDS, a warning is displayed as a message or the like on the display screen 176 of the operation unit 170 that also functions as the warning means 175 without performing the thread winding operation. Or the safety ensuring means 228 composed of a buzzer, a safety light, etc. is operated to end the process. Thereby, the malfunctioning of the thread winding operation can be surely prevented.

  When the dedicated lower thread holding detection means 180 detects the lower thread dedicated thread EDS, the drive motor 91 of the thread holding member moving means 53 is driven based on the control command sent from the control means 93, and the yarn The lower drive plate 79 of the holding member moving means 53 moves forward along the guide groove 81 of the mechanism base 77 in a direction approaching the horizontal hook 4 shown on the left side of FIG. This forward movement of the lower drive plate 79 is transmitted to the upper drive plate 83 via the biasing spring 85, and the upper drive plate 83 advances integrally with the lower drive plate 79. Then, the cam groove 89 on the drive plate 83 moves forward, and the rear mounting pin 52 of the thread holding member 48 is pushed downward by the cam surface 88 of the cam groove 89. As a result, the rear mounting pin 52 is It moves from the upper and lower portions 76b of the moving groove 76 downward. Since the center-to-center distance between the rear mounting pin 52 and the front mounting pin 51 is the same as the curvature radius of the upper and lower portions 76b formed in the arc shape of the moving groove 76, the thread holding member 48 is used as the rear mounting pin. 30 is rotated in the clockwise direction in FIG. 30, and as shown in FIG. 33, each part shown in FIG. 30 advances forward with the longitudinal tip of the thread holding member 48 positioned upward along the outer peripheral surface of the outer hook 7. The possible pre-start state is reached. Further, the stopper pin 105 abuts against the abutting edge 100A in a state of abutting against the stopper pin operating arm 159.

  Next, when the lower drive plate 79 is further moved forward by further driving of the drive motor 91, the yarn holding member 48 is moved forward along the moving groove 76. As shown in FIG. 34 and FIG. The front mounting pin 51 abuts against the tip of the moving groove 76 shown on the left side of FIG. 34, and the forward movement of the yarn holding member 48 is such that the tip of the yarn holding member 48 is moved from the sewing machine leg 1d side into the inner hook 18. Specifically, the bobbin 22 accommodated in the inner hook 18 enters the upper flange 37, and the thread holding member 48 stops at the entry position where it enters the bobbin attaching / detaching groove 24 and enters an advanced state. At this time, the operating pin 108 of the bobbin driving member moving means 94 comes into contact with the inclined cam surface 109. Further, the stopper pin 105 abuts against the abutting edge 100 </ b> A while being separated from the stopper pin operating arm 159.

  Next, when the drive motor 91 is further driven, the lower drive plate 79 is further moved forward, and the operation pins 108 of the bobbin drive member moving means 94 are inclined cams as shown in FIG. The surface 109 is pushed down, the gear coupling link 96 rotates in the clockwise direction, and the operating plate 95 comes into contact with the lower end of the bobbin driving member 11 to raise the bobbin driving member 11 against the urging force of the bobbin driving member urging spring 12. The bobbin driving gear 11 provided at the upper end of the bobbin driving member 11 meshes with both the gear hole 17 of the outer pot bottom plate 16 and the bobbin driven gear 35 to constitute the rotational transmission mechanism 340. And the bobbin 22 are connected to each other, and the bobbin 22 is positioned at a connecting position where the bobbin 22 is rotated. At the same time, the stopper 103 is rotated counterclockwise by the urging force of the spring 107 (FIG. 14), and the stopper pin 105 is engaged with the groove bottom 100a of the arcuate groove portion 100 of the gear connecting link 96. Further, the drive plate lower 79 moves forward, but the biasing spring 85 contracts in the axial direction, and the movement of the drive plate upper 83 is held in a stopped state. As a result, the yarn holding member 48 The entry position where the tip portion has entered the inside of the inner hook 18 is held.

  Further, the positional relationship between the bobbin 22 and the yarn holding member 48 in the state where the yarn can be wound is such that, as shown in FIG. 10, the lower yarn that is obliquely connected between the upper yarn holding portion 59 and the yarn position regulating portion 58 of the yarn holding member 48. The dedicated thread EDS is pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22.

  As described above, the thread holding member 48 is moved from the sewing machine pedestal 1d side to the inside position of the inner hook 18, specifically, the upper position of the upper flange 37 of the bobbin 22 housed in the inner hook 18. By being positioned, the yarn holding member 48 can more easily and reliably capture the lower yarn DS on the bobbin 22.

  Next, in accordance with a control command sent from the control means 93, the needle bar disconnecting mechanism 140 disconnects the reciprocating motion of the needle bar 2 in the vertical direction from the rotation of the upper shaft, and reciprocates the needle 3 in the vertical direction. The needle 3 is stopped and held upward, and then the sewing machine 1 with the lower thread winding device is driven.

  When the sewing machine 1 with a bobbin thread winding device is driven, the outer hook 7 rotates forward, and the rotation of the outer hook 7 is adsorbed by the driving force transmitting means 330, specifically, the outer hook bottom 7e magnetic force of the outer hook 7. The bobbin driving gear 14 at the upper end of the bobbin driving member 11 is rotated forward through the magnetic body 332 and the outer hook bottom plate 16 in this order, and as a result, the bobbin driven gear 35 meshed with the bobbin driving gear 14 is moved to the outer hook 7. The bobbin 22 reversely rotates in the direction opposite to the rotation direction of the outer hook 7.

  At this time, the magnetic body 332 of the driving force transmitting means 330 is attracted (pressed) to the outer hook 7 by the magnetic force of the magnetic body 332 and rotates integrally with the outer hook 7, so that the bobbin 22 can be easily rotated during the thread winding operation. Can do. On the other hand, the driving force transmission means 332 may cause a trouble such as catching of the lower thread DS in the lower thread DS supply path when an overload is applied to the lower thread DS positioned on the supply side during the yarn winding operation. When the rotation of the bobbin 22 is stopped, the integral rotation of the driving force transmission means 330 and the outer hook 7 exceeds the adsorption force (pressure contact force) between the driving force transmission means 332 and the outer hook 7 due to the magnetic force of the magnetic body 332. The driving force transmission means 332 can be easily stopped by slipping and the driving force transmission means when a trouble such as a catch of the lower thread DS occurs in the lower thread DS supply path during the yarn winding operation. Since it is possible to reliably prevent a portion of 332 from being broken and a bobbin rampage, safety can be improved.

  Further, since the magnetic body 332 of the driving force transmission means 332 attracts the inner hook 18 to the outer hook 7, the state where the inner hook 18 is supported on the race surface 7 d of the outer hook 7 can be easily and reliably held. As a result, the inner hook 18 can be reliably prevented from jumping out from the outer hook 7 unnecessarily.

  Then, by the reverse rotation of the bobbin 22, the lower thread dedicated thread EDS that is obliquely connected between the upper thread holding part 59 and the thread position regulating part 58 of the thread holding member 48 pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22. Is easily caught in the opening 39a of the slit 39 of the bobbin 22, and is fed into the concave groove 41 as the yarn catching portion formed on the bobbin central shaft 36, that is, the lower thread dedicated thread EDS on the lower thread thread piece 111 side. Is guided and wound tightly. Accordingly, the lower thread DS can be easily and reliably supplied to the bobbin 22, and when the lower thread dedicated thread EDS is consumed by the sewing operation, the bobbin 22 is reliably rotated until the lower thread DS is completely consumed. Can be made.

  Then, when the bobbin 22 rotates the bobbin 22 and the lower thread dedicated thread EDS is wound around the groove 41, the bobbin thread dedicated thread EDS gets over the wall 40 downward in FIG. 7 and winds around the outer peripheral surface of the bobbin central shaft 36. As the bobbin 22 continues to rotate, the bobbin winding is further performed. Further, the lower thread dedicated thread EDS on the yarn end side held by the upper thread holding portion 59 of the thread holding member 48 is slightly pulled by the rotation of the bobbin 22, and jumps out of the slit 39. At this time, an appropriate tension is applied to the lower thread dedicated thread EDS wound around the bobbin 22 by dedicated thread tension applying means 296 integrally formed with the thread holding spring 66 of the thread holding member 48, as shown in FIG. Since it can be easily applied, the bobbin 22 can be firmly wound with the bobbin thread dedicated EDS EDS in an appropriate state.

  The lower thread dedicated thread EDS is wound around the bobbin 22 until the thread winding amount stored in the thread winding amount control unit 197 or the limit thread winding number setting unit 198 is reached. When the winding reaches a preset amount of thread winding, the sewing machine, that is, the sewing machine 1 with a lower thread winding device is stopped based on the control command of the first thread winding operation control unit 193A. At this time, the needle bar disconnecting mechanism 140 disconnects the reciprocating motion of the needle bar 2 in the vertical direction from the rotation of the upper shaft, stops the reciprocating motion of the needle 3 in the vertical direction, and holds the needle 3 upward. keeping.

  Further, since the lower thread dedicated thread EDS wound around the bobbin 22 is firmly wound in the concave groove 41, when the lower thread dedicated thread EDS is consumed by the sewing operation, the lower thread dedicated thread EDS is Since the yarn end side that is consumed from the outer peripheral surface side of the central shaft 36 and is finally wound tightly in the concave groove 41 as the yarn catching portion is consumed, the bobbin 22 is surely secured until the lower thread dedicated yarn EDS is completely consumed. Can be rotated.

  Next, the threading operation to the lower thread tension means for the lower thread exclusive thread and the cutting operation of the lower thread dedicated thread will be described with reference to FIGS.

  FIG. 37 to FIG. 41 show the yarn hooking operation to the lower yarn tension means and the cutting operation of the lower yarn dedicated yarn for the lower yarn exclusive yarn. FIG. 37 is a view similar to FIG. 38 is an explanatory view of the main part showing the positional relationship between the yarn catching hook and the lower thread exclusive thread, FIG. 39 is a perspective view of the main part showing the progress in the middle of the yarn hooking operation and the cutting operation, and FIG. 40 is FIG. FIG. 41 is a diagram similar to FIG. 39 showing the progress in the middle, and FIG. 41 is a diagram similar to FIG. 39 showing the progress in the middle of FIG.

  The thread threading on the lower thread tension means 25 of the lower thread dedicated thread EDS is for applying the lower thread tension necessary for performing the sewing operation to the lower thread DS supplied to the bobbin 22.

  After the end of the bobbin winding, the drive motor 91 is driven in reverse rotation by the control command sent from the control means 93, and the lower drive plate 79 moves backward. Then, as shown in FIG. 37, the backward movement of the drive plate lower 79 is such that the longitudinal end of the thread holding member 48 is slightly above the retracted position near the outer peripheral surface of the outer hook 7, that is, the thread catching hook. It stops at the yarn catching position located below the rotation trajectory 46 and enters a state where it can catch the lower yarn. At this time, the operating pin 108 of the bobbin driving member moving means 94 is separated from the inclined cam surface 109, but the stopper pin 105 maintains the state of being fitted to the groove bottom 100a of the arcuate groove portion 100 of the gear connecting link 96. The bobbin driving member 11 maintains the raised state, and the bobbin driving gear 14 provided at the upper end of the bobbin driving member 11 meshes with both the gear hole 17 of the outer pot bottom plate 16 and the bobbin driven gear 35 to drive the bobbin. The connection position which connects the member 11 and the bobbin 22 and makes the bobbin 22 in a rotating state is maintained. As shown in FIG. 37, the supply side of the lower thread dedicated thread EDS wound around the bobbin 22 is pulled by the thread holding member 48 by the movement of the thread holding member 48 to the thread catching position, and the outer hook 7 The crossing portion of the tip edge of the yarn holding plate spring 66 of the yarn holding member 48 and the tip edge of the yarn holding and catching portion 49 is bent downward at the outer peripheral angle and is not held by the upper yarn holding portion 59 of the yarn holding member 48. Locked in.

  Further, in order to perform the winding operation by the next lower thread dedicated thread EDS, the upper thread holding portion 59 of the thread holding member 48 holds the yarn end of the lower thread dedicated thread EDS, thereby lowering the lower thread to the thread holding member 48. The threading operation of the dedicated thread EDS can be omitted to facilitate the operation.

  37, the sewing machine 235 of the sewing machine 1 with the lower thread winding device, specifically, the sewing machine for the amount of rotation of the upper shaft (not shown) is rotated by the control command sent from the control means 93 in the state where the lower thread can be captured. To drive. Then, the outer hook 7 rotates forward, and the thread separation inclined surface 47 of the thread catching hook 46 disposed on the outer peripheral surface of the outer hook 7 is bent downward at the outer peripheral angle of the outer hook 7 only. The thread EDS is pushed out in the direction away from the outer peripheral surface of the outer hook 7, and the supply side of the lower thread dedicated thread EDS wound around the bobbin 22 is pushed into the upper thread holding portion 59 of the thread holding member 48. As a result, the lower thread dedicated The yarn EDS can be held by the upper yarn holding portion 59.

  Next, when the drive motor 91 is further reversely driven by the control command sent from the control means 93 and the lower drive plate 79 reaches the retracted end, the respective parts in the lower thread catchable state shown in FIG. Returns to the initial state shown. At this time, the tip of the yarn holding member 48 moves downward along the outer peripheral surface of the outer hook 7, so that the lower yarn dedicated yarn EDS continuous between the bobbin 22 and the upper yarn holding portion 59 of the yarn holding member 48. Is stretched. At the same time, the stopper pin 105 of the stopper 103 is rotated clockwise around the support pin 101 by the 79 stopper pin operating arms 159 below the drive plate, so that the stopper pin 105 is rotated in the arcuate groove portion 100 of the gear connecting link 96. Disconnect from. Then, the stopper pin 105 is separated from the groove bottom 100a of the arcuate groove portion 100 of the gear connection link 96, and the gear connection link 96 is operated by rotating counterclockwise around the link support pin 97 by the biasing force of the spring 6. The plate 95 is separated downward from the bobbin driving member 11. As a result, the bobbin driving member 11 is separated from the bobbin 22 and returned to the separated position where the bobbin 22 is not rotated, and the bobbin 22 is in a freely rotatable state. It becomes.

  Next, when the sewing machine, specifically, the sewing machine motor 235 of the sewing machine 1 with the lower thread winding device is driven to rotate in reverse by the control command sent from the control means 93, the outer hook 7 rotates in reverse and the hook portion of the thread catching hook 46 is rotated. 46 a captures the lower thread dedicated thread EDS located between the bobbin 22 located in the vicinity of the outer periphery of the outer hook 7 and the upper thread holding part 59 of the thread holding member 48. Then, when the hook portion 46a of the yarn catching hook 46 is reversely rotated in a state where the lower thread exclusive thread EDS is captured and reaches the position shown in the lower part of FIG. 38, the lower thread exclusive thread EDS coming out of the bobbin 22 is shown in FIG. As shown, it rides on the upper edge of the substrate 26 of the lower thread tension means 25 and passes through the gap between the protrusion 19 of the inner hook 18 and the inner hook stopper 20. The lower thread dedicated thread EDS that has come out from below the hook part 46 a of the thread catching hook 46 is wound around the outer periphery of the large diameter part 7 a of the outer hook 7 and is connected to the upper thread holding part 59 of the thread holding member 48.

  Next, by further reverse rotation of the outer hook 7, the lower thread dedicated thread EDS riding on the upper end edge of the substrate 26 of the lower thread tension means 25 slides on the upper end of the substrate 26 and reaches the position shown diagonally lower left in FIG. 38. Then, the lower thread tension means 25 is drawn into the yarn path entrance 27 formed at the upper end edge of the substrate 26. As a result, as shown in FIG. Enter (see).

  Next, when the lower thread exclusive thread EDS that has entered the thread introduction groove 28 reaches the position shown in the left side of FIG. 38 and FIG. 41 by further reverse rotation of the outer hook 7, the lower thread tension means 25 shown in FIG. Between the thread locking hole 29 and the thread outlet 30 in a state of being urged by the urging force of the lower thread presser leaf spring 31, and as a result, an appropriate lower thread tension necessary for the sewing operation is exclusively used for the lower thread. It can be reliably applied to the yarn EDS.

  As described above, the rotation center of the inner hook 17, that is, the rotation center of the bobbin 22 is shifted with respect to the rotation center of the outer hook 7, and the bobbin 22 is rotated in the reverse direction with respect to the rotation direction of the outer hook 7 only during the thread winding operation. Thus, the lower thread DS (lower thread dedicated thread EDS or upper thread US) can be easily captured in the slit 39 of the bobbin 22 during the thread winding operation, and the lower thread UD (lower thread) to the lower thread tension means 25 can be obtained. The threading of the dedicated thread EDS or the upper thread US) can be performed more appropriately and reliably. In addition, such a configuration can easily prevent hitch stitches during the sewing operation to improve the quality of the sewing product, and can easily secure a space for installing a thread trimming device and a lower thread feeding device (not shown). You can also. Furthermore, the configuration of this embodiment in which the thread hooking to the lower thread tension means 25 is performed by rotating the outer hook 7 in the reverse direction after the winding of the yarn is completed, the thread outlet 30 from the lower thread tension means 25 is placed on the inner hook 18. Since the lower thread path from the bobbin after the conventional winding to the fabric passes under the hook, the cause of unstable tension of the lower thread DS, such as increased resistance to the thread path bending, can be reliably removed. An appropriate lower thread tension can be easily applied to the thread DS.

  When the lower thread dedicated thread EDS is located on the left side of FIG. 38, the cutting edge of the cutting blade 43 provided in the outer hook 7 is threaded from the upper thread holding portion 59 indicated by B in FIG. Since the EDS is positioned in the vicinity of the contact point where the outer hook of the outer hook 7 starts to wind, the lower thread dedicated thread EDS wound around the outer hook of the outer hook 7 gets over the slope of the slashing portion 44 shown in FIG. It is pressed and cut. At this position, the length of the lower thread DS from the lower thread tension means 25 necessary for binding seams is cut by cutting the lower thread dedicated thread EDS from the bobbin 22 to the upper thread holding portion 59 of the thread holding member 48. Can be ensured sufficiently, and the yarn residue on the yarn end side from the upper yarn holding portion 59 of the yarn holding member 48 can be reduced.

  Next, in response to a control command sent from the control means 93, the reverse rotation of the outer hook 7 is stopped, and the needle bar cutting mechanism 140 reciprocates the needle bar 2 in the vertical direction separated from the rotational movement of the upper shaft. By connecting to the rotation of the upper shaft, each part of the sewing machine 1 with the lower thread winding device returns to the initial state, and the thread winding operation of the lower thread dedicated thread EDS is completed.

  Further, when the lower thread dedicated thread EDS is used as the lower thread DS to be supplied to the bobbin 22, the thread holding member 48 can easily hold the thread end of the lower thread dedicated thread EDS after the end of the thread winding operation. Until the lower thread exclusive thread EDS disappears from the lower thread spool 111, the thread winding operation can be easily repeated.

  Next, the thread winding operation of the upper thread will be described with reference to FIGS. 9, 10, 30 to 36, 42 and 43. FIG. The description of the same parts as the above-described thread winding operation of the lower thread dedicated thread EDS will be omitted.

  FIG. 42 is an explanatory view showing an upper thread catching state in which the thread holding member of the sewing machine with the lower thread winding device according to the present invention captures the upper thread, and FIG. 43 shows the thread retaining member of the sewing machine with the lower thread winding device according to the present invention. It is explanatory drawing which shows the cutting | disconnection operation | movement of the yarn end of the captured upper yarn.

  The thread winding operation of the upper thread US by the sewing machine 1 with the bobbin thread winding device of the present embodiment is performed in a manual thread winding mode by operating the thread winding start / stop switch 177 without being threaded on the thread holding member 48 or automatically by a thread winding signal. The thread winding operation is started in the thread winding mode. The automatic thread winding mode will be described later.

  When a control command is sent from the control means 93 to each section, first, it is determined whether or not the lower thread dedicated thread EDS supplied by the dedicated lower thread holding detection means 180 during the thread winding operation is held by the thread holding member 48. The detection result is sent to the control means 93, and the erroneous winding operation preventing unit 202 of the control means 93 determines whether or not the set state matches the state of the sewing machine 1 with the lower thread winding device. When the dedicated lower thread holding detection means 180 detects the lower thread dedicated thread EDS, a warning is displayed as a message or the like on the display screen 176 of the operation unit 170 that also functions as the warning means 175 without performing the thread winding operation. Or the safety ensuring means 228 is driven to finish. Thereby, malfunction can be prevented reliably.

  When the dedicated lower thread holding detection means 180 does not detect the lower thread dedicated thread EDS, the drive motor 91 of the thread holding member moving means 53 is driven based on the control command sent from the control means 93, and Similar to the thread winding operation of the lower thread dedicated thread EDS, the thread holding member 48 of the sewing machine 1 with the lower thread winding device located in the initial state shown in FIG. It is in the forward movement state shown in FIG. 34 and 35, the drive motor 91 is stopped based on the control command sent from the control means 93.

  Next, when the yarn holding member 48 of the sewing machine 1 with the bobbin thread winding device stops in the forward movement state shown in FIGS. 34 and 35, the upper shaft (not shown) makes one rotation based on the control command sent from the control means 93. The sewing machine 235 of the sewing machine 1 with a bobbin thread winding device is driven. Then, the needle 3 positioned at the upper stop position is reciprocated by one stitch in the vertical direction by the vertical movement of the needle bar 2, and the upper thread loop coming out of the needle hole of the needle 3 is rotated forward. It is caught by the sword tip 42 and turns around the inner pot 18. At this time, the upper thread US rotating around the inner hook 18 by the sword tip 42 is divided into the upper and lower parts of the inner hook 18, the upper thread US on the cloth side passes over the inner hook 18, and the upper thread US on the needle side becomes the inner thread US. It passes through a gap formed by the bottom surface of the hook 18 and the top surface of the bobbin drive gear 14. In the case of winding the upper thread US in the middle of the sewing operation, as shown in FIG. 5, there is no problem because one end of the upper thread US is connected to the seam of the sewing product S such as cloth. In other cases, it is important to drive the sewing machine, specifically the sewing machine motor 235 of the sewing machine 1 with the lower thread winding device, after holding the upper end of the upper thread US by hand.

  As shown in FIGS. 34 and 35, the upper thread US turning around the upper surface of the inner hook 18 is housed in the upper end of the inner hook 18, more specifically in the inner hook 18, as shown in FIGS. Since it stops at the entry position that has entered above the upper flange 37 of the bobbin 22, it is formed by the intersection of the tip edge of the yarn holding leaf spring 66 and the tip edge of the yarn holding / capturing portion 49 shown in detail in FIG. The upper thread locking portion 60 is inserted into an opening portion. Further, after passing the gap between the protrusion 19 of the inner hook 18 and the inner hook stopper 20 by further rotation of the sword tip 42, the thread holding leaf spring 66 detailed in FIG. The upper thread US is pulled out from the inner hook 18 after being inserted into the opening formed by the upper thread rear holding part 70 formed by the upper rear tongue piece 69 and the rear tongue piece 55 of the thread holding / capturing part 49. As shown in FIG. 42, the upper thread US is captured by the thread holding member 48 and the upper thread is captured. At this time, as shown in FIG. 42, the upper thread US is not held by the upper thread holding portion 59 (see FIGS. 9 and 10) but is locked by the upper thread locking portion 60. A portion connected between the stop portion 60 and the upper thread rear holding portion 70 is stretched so as to be positioned at the yarn position restricting portion 58 in the same manner as the lower thread dedicated thread EDS shown in FIG.

  The upper thread US at the time of the sewing operation is a thread necessary for the seam by the drive motor 125 driven according to the control command sent from the control means 93 for each stitch by the upper thread feeding mechanism 120 shown in FIG. Only the amount is fed out, and at the time of thread tightening, the drive motor 125 stops and the upper thread US is held between the drive roller 124 and the driven roller 128, and an appropriate thread tension can be obtained.

  Further, the upper thread US during the thread winding operation does not require the thread amount necessary for the sewing operation necessary for the sewing operation at the first stitch driven by the horizontal hook 4 immediately after the start of the thread winding operation. The amount of yarn for the path is required. Further, in order to ensure that the upper thread US is captured by the thread holding member 48, an appropriate tension is required for the upper thread US. Therefore, in accordance with a control command sent from the control means 93, the upper thread unwinding mechanism 120 unwinds an upper thread US (not shown) after unwinding the upper thread US that is substantially equal to or slightly smaller than the thread amount necessary for the thread path shown in FIG. At the time of thread tightening by the mechanism, the upper thread US can be reliably captured by the thread holding member 48 by stopping the drive motor 125 and holding the upper thread US between the driving roller 124 and the driven roller 128. .

  When the thread holding member 48 of the sewing machine 1 with the lower thread winding device is stopped in the forward movement state shown in FIGS. 34 and 35, the bobbin driving gear 14 is separated downward from the bobbin driven gear 35.

  Next, as described above, in response to a control command sent from the control means 93, the needle bar disconnecting mechanism 140 disconnects the reciprocating motion of the needle bar 2 in the vertical direction from the rotation of the upper shaft, thereby moving the needle 3 in the vertical direction. The needle 3 is held upward, and then the sewing machine 1 with the lower thread winding device is driven.

  Next, after the yarn holding member 48 captures the upper yarn US, the parts shown in FIGS. 34 and 35 are in the state capable of winding the yarn shown in FIG. 36 as described above by further driving of the drive motor 91. 36, the bobbin driving gear 14 meshes with the bobbin driven gear 35. Further, the positional relationship between the bobbin 22 and the thread holding member 48 in the thread winding enabled state is such that the upper thread engaging portion 64 and the thread position regulating portion 58 of the thread holding member 48 are obliquely connected as shown in FIG. The thread US is pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22.

  Next, when the sewing machine 1 with a bobbin thread winding device is driven by a control command sent from the control means 93, the outer hook 7 rotates forward, and the rotation of the outer hook 7 is caused by the bobbin driving member via the outer hook bottom plate. As a result, the bobbin driven gear 35 meshed with the bobbin driving gear 14 is reversely rotated in the direction opposite to the rotation direction of the outer hook 7, so that the bobbin 22 is moved to the outer hook 7. It rotates in the opposite direction to the direction of rotation.

  Then, due to the reverse rotation of the bobbin 22, the upper thread US obliquely connected between the upper thread locking portion 64 and the thread position regulating portion 58 of the thread holding member 48 pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22. The needle 39 on the supply side, that is, the upper thread US on the upper thread thread piece 121 side, is guided into the groove 41 formed in the bobbin central shaft 36 by being captured by the opening 39a of the slit 39 of the bobbin 22. When the upper thread US is wound in the concave groove 41 by the rotation of the bobbin 22, and when the upper thread US is captured by the opening 39a of the slit 39 of the bobbin 22, a part of the thread loosening means 138 is moved. The constituting solenoid 136 is driven, each driven roller 128 is released away from the driving roller 124, and the bobbin 22 continues to rotate so that the upper thread US is drawn from the upper thread spool 121 and further wound.

  As described above, when the upper thread US is used as the lower thread DS to be supplied to the bobbin 22, the thread loosening means 138 holds the upper thread US held between each driven roller 128 and the driving roller 124 during the thread winding operation. Since the state is released, a smooth thread winding operation can be easily performed without applying an excessive force to the upper thread US.

  In addition, as shown in FIG. 43, the bottom end 39b of the slit 39 is displaced from the rotation center of the bobbin 22 on the thread end side of the upper thread US that leads from the slit 39 of the bobbin 22 to the seam of the sewing product S such as cloth. 43, the upper thread US that has come out from the bottom 39b of the slit 39 is rotated as indicated by the broken-line circle in FIG. 43. The bobbin 22 rotates in the clockwise direction in FIG. Yarn provided on the edge of the bent portion 63b on the rear end side shown in the right side of FIG. 11 by being further drawn into the squeeze opening 63d formed integrally with the holding and catching tip 63 and then further rotated by the bobbin 22. The end cutting blade 56 cuts easily and reliably in the immediate vicinity of the bobbin 22, and as a result, the yarn end of the upper thread US protruding from the bobbin 22 can be shortened.

  Then, the upper thread US is wound around the bobbin 22 until the thread winding amount set by the thread winding amount control unit 197 or the limit thread winding number setting unit 198 is reached, and the upper thread US is wound around the bobbin 22 in advance. When the set thread winding amount is reached, the sewing machine 1 with the lower thread winding device stops based on the control command of the second thread winding operation control unit 193A. At this time, the needle bar disconnecting mechanism 140 disconnects the reciprocating motion of the needle bar 2 in the vertical direction from the rotation of the upper shaft, stops the reciprocating motion of the needle 3 in the vertical direction, and holds the needle 3 upward. keeping.

  Next, the yarn hooking operation to the lower yarn tension means of the upper yarn as the lower yarn supplied to the bobbin and the cutting operation of the upper yarn will be described with reference to FIGS.

  The thread hooking to the lower thread tension means 25 of the upper thread US as the lower thread DS supplied to the bobbin 22 is to apply the lower thread tension necessary for the sewing operation to the lower thread DS supplied to the bobbin 22. belongs to.

  After the bobbin winding is finished, according to the control command sent from the control means 93, the drive motor 91 is reversely driven to move backward under the drive plate 79, and each part shown in FIG. 36 reaches the initial state shown in FIG. Return. The yarn hooking operation to the lower yarn tension means 25 of the upper yarn US as the lower yarn DS supplied to the bobbin 22 is different from the yarn hooking operation to the lower yarn tension means 25 of the lower yarn dedicated thread EDS. Since it is not necessary for the upper thread holding portion 59 of 48 to hold the yarn end, the upper yarn US as the lower yarn DS that has come out of the bobbin 22 is substantially the same as the yarn path indicated by C in FIG. Become. From this initial state, in the same manner as the yarn threading operation to the lower thread tension means 25 of the lower thread exclusive thread EDS described above, the sewing machine, specifically, the sewing machine 1 with the lower thread winding device 1 is controlled by a control command sent from the control means 93. When the sewing machine motor 235 is driven to rotate in the reverse direction, the outer hook 7 rotates in the reverse direction, and the hook portion 46a of the thread catching hook 46 is located near the outer periphery of the outer hook 7 and the upper thread locking portion 60 of the thread holding member 48. The upper thread US positioned between the upper thread US and the hook portion 46a of the thread capturing hook 46 rotates backward in a state where the upper thread US is captured. The upper thread as the lower thread DS entering the thread introduction groove 28 is guided by the yarn path entrance 27 formed at the upper edge of the substrate 26 and enters the thread introduction groove 28 and further reversely rotated by the outer hook 7. The thread US is the lower thread tension means 25. It is arranged between the locking hole 29 and the thread outlet 30 in a state of being urged by the urging force of the lower thread presser leaf spring 31. As a result, an appropriate lower thread tension required during the sewing operation is set as the lower thread DS. It can be reliably applied to the upper thread US.

  In addition, the upper thread US as the lower thread DS is cut by the cutting edge of the cutting blade 43 provided in the outer hook 7 as in the case of the lower thread exclusive thread EDS, and is necessary for binding the seam as the thread remaining on the needle side. A sufficient length can be secured.

  Next, in response to a control command sent from the control means 93, the reverse rotation of the outer hook is stopped, and the needle bar disconnecting mechanism 140 performs the up and down reciprocation of the needle bar 2 separated from the rotational movement of the upper shaft. By connecting to the rotation of the shaft, each part of the sewing machine 1 with the lower thread winding device returns to the initial state, and the thread winding operation of the upper thread US as the lower thread DS ends.

  The above description is the bobbin winding operation in the manual bobbin mode by operating the bobbin wind start / stop switch 177. The following describes automation.

  First, the bobbin rotation state and the detection operation without the lower thread will be described with reference to FIGS. 7, 8, 44 and 45. FIG.

  44 is a plan view showing the configuration of the main part of the lower thread detecting means of the sewing machine with a lower thread winding device according to the present invention, and FIG. 45 is a diagram showing the sensor output of the reflection type photosensor and the output signal of the main shaft sensor. .

  When sewing is performed in a state where the lower thread DS is wound around the bobbin 22, the bobbin 22 rotates, and the lower side of the reflective optical sensor 211 is placed on the upper surface of the upper flange 37 as shown in FIGS. The high reflectance part 210a shown by white in FIG. 8 and the low reflectance part 210b shown by diagonal lines in FIG. 8 of the provided reflection tape 210 pass alternately. When the high reflectance portion 210 a of the reflective tape 210 faces the reflective optical sensor 211, the reflective optical sensor 211 passes a large amount of current, and when the low reflectance portion 210 b of the reflective tape 210 faces the reflective optical sensor 211, the reflective optical sensor 211 reflects. The type optical sensor 211 has a smaller current. Therefore, when the current is supplied to the load resistance, a substantially pulsed sensor output can be obtained as shown in FIG. Further, when the lower thread DS is consumed from the bobbin 22 and the yarn end of the lower thread DS is separated from the bobbin central shaft 36, the bobbin 22 is not rotated, and the sensor output of the reflective optical sensor 211 becomes a substantially constant level. As shown at 45, a substantially flat sensor output can be obtained. FIG. 45 also shows the output signal (spindle signal) of the spindle sensor 218. This spindle signal indicates one stitch per cycle (for one sewing machine).

  The sensor output of the reflection type optical sensor 211 is output to the CPU 190 via the A / D converter 233 of the control means 93 as shown in FIG. Then, the CPU 190 samples the output sent from the A / D converter 233 for a predetermined number N of needles obtained by the output signal of the spindle sensor 218 shown in FIG. 45, and outputs the sensor output during that time. The value is stored in the memory 191. Then, the maximum value and the minimum value of the obtained sensor output are calculated. If the difference between the maximum value and the minimum value of the obtained sensor output is equal to or greater than a predetermined threshold value (predetermined voltage value), it is determined that the bobbin is rotating. If the difference between the maximum value and the minimum value of the obtained sensor output is equal to or less than a predetermined threshold value (predetermined voltage value), it is determined that the state has continued for a predetermined number of stitches, and the bobbin 22 has no bobbin thread DS and the bobbin 22 Is determined to have stopped rotating.

  Here, the reason for looking at a plurality of needles when the difference between the maximum value and the minimum value of the sensor output is equal to or smaller than a predetermined threshold value (predetermined voltage value) is that when a pattern with low thread consumption is being sewn or the bobbin 22 When the bobbin thread DS is wound around the bobbin 22, the bobbin 22 has a small rotation angle. Therefore, when the number of stitches is 1 or 2, the high reflectance portion 210a and the low reflectance portion are located below the reflective photosensor 211. This is because 210b does not pass.

  As described above, according to the sewing machine 1 with the lower thread winding device of the present embodiment, it is possible to reliably and easily determine the rotation state of the bobbin 22 and the presence or absence of the lower thread DS wound around the bobbin 22.

  The determination of the rotating state of the bobbin and the presence or absence of the lower thread wound around the bobbin will be described with reference to the flowchart shown in FIG.

  FIG. 46 is a flowchart for explaining the state of bobbin rotation of the sewing machine with a lower thread winding device according to the present invention and the presence / absence of lower thread wound around the bobbin.

  As shown in FIG. 46, the rotation state of the bobbin 22 and the presence / absence of the lower thread DS wound around the bobbin 22 are determined by first reading the output of the reflective optical sensor 211 in step ST100 and then in step ST101. The read value is stored in the memory 191. In the next step ST102, the number of stitches is counted by the spindle signal, and the process proceeds to the next step ST103.

  Next, in step ST103, it is determined whether the number of stitches is N. If the determination in step ST103 is NO (less than N stitches), the process returns to step ST100, and the determination in step ST103 is YES (equal to N stitches). In this case, the process proceeds to the next step ST104, the maximum value and the minimum value of the sensor output are calculated in step ST104, and the process proceeds to the next step ST105.

  Next, in step ST105, it is determined whether the difference between the maximum value and the minimum value of the obtained sensor output is smaller than a predetermined threshold value (predetermined voltage value V), and the determination in step ST105 is NO (larger than the threshold value). In this case, it is determined that the bobbin 22 is in a rotating state, and the process returns to step ST100.

  If the determination in step ST105 is YES (smaller than the threshold value), the process proceeds to the next step ST106, where it is determined that the state has continued for a predetermined number of stitches, and the bobbin 22 has no lower thread DS and the bobbin 22 rotates. It is determined that has stopped and ends.

  The rotation state of the bobbin 22 and the presence / absence of the lower thread DS wound around the bobbin 22 are determined by a program that can execute the flowchart stored in the memory 191 and the CPU 190 or the like.

  Next, the consumption of the remaining yarn will be described.

  Even if the bobbin 22 stops rotating, the lower thread DS remains sandwiched between the lower thread tension means 25. In this state, a new lower thread DS cannot be supplied to the bobbin 22. Accordingly, after a plurality of stitches are sewn using the remaining thread as a pattern according to a control command sent from the needle position control unit 242 at the time of sewing interruption, a detection signal indicating that no lower thread is sent from the lower thread detecting means 214 is sent. In this case, the sewing machine 1 with the lower thread winding device is stopped after moving a plurality of stitches from the sewing position at the time when the detection signal indicating that there is no lower thread is detected, and then automatic thread winding start processing is performed. The number of remaining needles after the bobbin 22 is stopped is determined by the yarn path in the vicinity of the hook and is almost constant. Therefore, the remaining yarn amount is stored in advance in a ROM that constitutes a part of the memory 191, and this remaining yarn amount is subtracted by the lower yarn consumption amount for each stitch after the bobbin 22 stops, and the determination is made. . Since the lower thread consumption is substantially equal to the upper thread consumption, it can be easily estimated by calculating the upper thread consumption. The upper thread consumption amount can be easily calculated from the cloth thickness, the cloth feed amount, and the needle swing amount as seen in a known automatic thread tension sewing machine.

  Next, the consumption of the remaining yarn will be further described with reference to the flowchart shown in FIG.

  FIG. 47 is a flowchart for explaining the consumption of the remaining yarn of the sewing machine with a lower thread winding device according to the present invention.

  As shown in FIG. 47, the consumption of the remaining yarn is first read from the ROM constituting a part of the memory 191 in step ST200, the remaining yarn amount “L” after the bobbin 22 is stopped.

  Next, in step ST201, it is determined whether or not the spindle signal is ON / OFF. If the spindle signal is OFF, the process waits until the spindle signal is ON. If the spindle signal is ON, in step ST201, The lower thread consumption amount “l” for each stitch is calculated from the fabric thickness, the cloth feed amount, and the needle swing amount. In the next step ST202, a value obtained by subtracting the lower thread consumption amount l from the remaining yarn amount L is newly calculated. The remaining yarn amount “L” is set, and the process proceeds to the next step ST204.

  Next, in step ST204, it is determined whether or not the remaining yarn amount “L” is smaller than 0. If the determination in step ST204 is NO (there is a remaining yarn), the process returns to step ST201 and the determination in step ST204 is made. Is YES (no remaining thread), the process proceeds to the next step ST205, the sewing machine is stopped, that is, the sewing machine is stopped after moving a plurality of stitches from the sewing position at the time when the detection signal of no lower thread is detected. Stops the sewing machine motor 235 of the sewing machine 1 with the bobbin thread winding device, and in the next step ST106, bobbin thread winding control, that is, automatic bobbin winding start processing is performed and the process ends.

  The remaining thread is consumed by a program stored in the needle position control unit 242 at the time of sewing interruption, the CPU 190, and the like.

  As described above, according to the sewing machine 1 with the lower thread winding device of the present embodiment, it is possible to reliably and appropriately perform the remaining thread consumption and the determination thereof. The thread winding operation for supplying the lower thread DS to the bobbin 22 can be started, and as a result, the thread winding operation can be easily automated.

  Next, the discrimination between no upper thread and no lower thread will be described.

  In the sewing machine 1 with the lower thread winding device of this embodiment, even when the upper thread US called upper thread breakage disappears during the sewing operation, no tension is generated in the lower thread DS, and the bobbin 22 stops rotating. To do. Therefore, the upper thread detecting means 221 shown in FIG. 17 is used to determine whether there is no upper thread or no lower thread. As shown in FIG. 17, when the upper thread US is present and the sewing operation is normally performed, the upper thread detecting means 221 generates tension in the upper thread US and is disposed in the upper thread path. The upper thread tension spring 220 is bent, and a shielding plate 222 interlocking with the upper thread tension spring 220 is a known one that shields and releases the light sensor (photo interrupter) 223. If the upper thread US runs out during the sewing operation, the upper thread US immediately stops being tensioned, and it can be detected that the upper thread US has run out in the output state of the light sensor 223. However, when the upper thread US is lost, since the lower thread DS forms a seam in the cloth, the bobbin 22 rotates because the lower thread DS is pulled when the cloth is fed. Conversely, when the lower thread DS is consumed normally, the rotation of the bobbin 22 stops, but the upper thread tension is generated due to the remaining thread, and the upper thread detecting means 221 does not operate. Therefore, it is possible to determine the absence of the upper thread and the absence of the lower thread by determining which is in the state first. That is, the rotation state of the bobbin 22 and the presence / absence of the upper thread US are monitored almost simultaneously, and the one that detects the state that does not exist first is preferentially determined.

  Next, the discrimination between the absence of the upper thread and the absence of the lower thread will be further described with reference to the flowchart shown in FIG.

  FIG. 48 is a flowchart for explaining discrimination between the absence of the upper thread and the absence of the lower thread of the sewing machine with the lower thread winding device according to the present invention.

  As shown in FIG. 48, the discrimination between the absence of the upper thread and the lower thread is first made at step ST300 in the reflection type optical sensor constituting part of the bobbin rotation state detecting means 215 which also serves as the lower thread detecting means 214. Whether the bobbin 22 is rotated or not is determined based on the output state 211. If the determination in step ST300 is not present (bobbin stopped state), the light that constitutes a part of the upper thread detecting means 221 in the next step ST301. The presence / absence of the upper thread US is determined based on the output state of the sensor 223. If the determination in step ST301 is present (upper thread is present), it is determined in the next step ST302 that there is no lower thread, and the process ends. If the determination in step ST301 is no (no upper thread), it is determined in step ST303 that an abnormality (abnormal operation) has occurred, and the process ends.

  If the determination in step ST300 is present (bobbin rotation state), the presence or absence of the upper thread US is determined in the next step ST304 based on the output state of the light sensor 223 constituting a part of the upper thread detection means 221. If there is no determination in step ST304 (no upper thread), it is determined in the next step ST305 that there is no upper thread and the process ends. On the other hand, if the determination in step ST304 is made (the upper thread is present), it is determined in the next step ST306 that the operation is normal (normal operation) and the process ends.

  Thus, by monitoring the presence or absence of each of the upper thread US and the lower thread DS, it is possible to reliably and easily determine which of the upper thread US and the lower thread DS has been lost.

  The discrimination between the absence of the upper thread and the absence of the lower thread is performed by a program stored in the thread absence discrimination control unit 241 and the CPU 190 or the like.

  Next, the automatic thread winding start will be described.

  According to the sewing machine 1 with the lower thread winding device of this embodiment, as described above, after determining that the remaining thread of the lower thread DS has been completely consumed, the thread winding is performed regardless of the setting state of the thread winding start / stop switch 177. Start can be done automatically.

  Next, selection of the automatic thread winding mode and the manual thread winding mode will be described with reference to FIGS. 49 and 50. FIG.

  FIG. 49 is a flowchart for explaining an example of selection between the automatic bobbin winding mode and the manual bobbin winding mode of the sewing machine with the lower thread winding device according to the present invention, and FIG. 50 is the automatic bobbin winding mode mode and manual operation of the sewing machine with the lower thread winding device according to the present invention. It is a flowchart explaining the other example of selection of the thread winding mode.

  As an example of selection between the automatic bobbin winding mode and the manual bobbin winding mode, as shown in FIG. 49, in step ST400, the setting state of the bobbin winding mode switch 226 (denoted as switch A in FIG. 49), that is, the bobbin winding mode switch If ON / OFF of 226 is determined and the determination in step ST400 is ON (automatic thread winding mode), in the next step ST401, the sewing machine 1 with the lower thread winding device is set to the automatic thread winding mode and the process ends.

  If the determination in step ST400 is OFF (manual thread winding mode), in the next step ST402, the sewing machine 1 with the lower thread winding device is set to the manual thread winding mode and the process is ended.

  That is, in the present embodiment, the automatic bobbin winding mode and the manual bobbin winding mode can be selected according to the setting state of the bobbin winding mode changeover switch 226. When the setting of the bobbin winding mode switch 226 is set to the automatic bobbin winding mode, the bobbin winding operation is automatically performed, and when the setting of the bobbin winding mode switch 226 is set to the manual bobbin winding mode, the bobbin winding start / stop is performed. When the switch 177 is turned on, the thread winding operation is performed.

  The automatic thread winding mode and the manual thread winding mode are selected by a program stored in the thread winding mode determination control unit 244, the CPU 190, and the like.

  As another example of the selection of the automatic thread winding mode and the manual thread winding mode, as shown in FIG. 50, in step ST500, a desired pattern is obtained from a plurality of pattern sewing data by operating the pattern selection process, that is, the pattern selection switch 172. Sewing data is selected, and the process proceeds to the next step ST501.

  Next, in step ST501, the pattern type is determined, that is, the selected sewing pattern is a practical pattern classified into a category called practical sewing used for straight stitching, zigzag stitching, buttonhole stitching, etc., or embroidery It is determined whether the pattern is an embroidery pattern classified as sewing, and if the determination in step ST501 is an embroidery pattern, in step ST502, the sewing machine 1 with the lower thread winding device is set to the automatic thread winding mode and the process ends. To do.

  The pattern type classification can be provided with data for displaying the pattern type classification for each pattern sewing data stored in the sewing data storage unit 200. Therefore, the pattern selected by the operation of the pattern selection switch 172 can be provided. The pattern type classification of the sewing data can be easily recognized by the CPU 190.

  Further, instead of performing the operation based on the desired pattern sewing data selected from the plurality of pattern sewing data by operating the pattern selection switch 172, the attachment / detachment state of the auxiliary parts necessary for forming the selected pattern, that is, the embroidery The CPU 190 can also easily recognize the detection signal sent from the embroidery device sensor 217 that detects the attachment / detachment state of the embroidery device 240 when performing sewing.

  If the determination in step ST501 is a practical pattern, in the next step ST503, the sewing machine 1 with a lower thread winding device is set to the manual thread winding mode and the process is ended.

  That is, in the present embodiment, the automatic bobbin winding mode and the manual bobbin winding mode can be selected in accordance with the selected pattern sewing data and / or the attachment / detachment state of the auxiliary parts necessary for forming the selected pattern. It can be done. When the sewing machine 1 with the lower thread winding device is set to the automatic thread winding mode, the thread winding operation is automatically performed. When the sewing machine 1 with the lower thread winding device is set to the manual thread winding mode, the thread winding start / stop is performed. When the switch 177 is turned on, the thread winding operation is performed.

  The pattern type classification is performed by the CPU 190, and the automatic thread winding mode and the manual thread winding mode are selected by a program stored in the thread winding mode automatic setting control unit 245, the CPU 190, and the like.

  Next, the automatic restart of the sewing operation after the bobbin winding operation for supplying the bobbin thread to the bobbin will be described.

  The sewing operation can be restarted by the following two methods after the yarn winding operation for supplying the bobbin thread DS to the bobbin 22 is completed.

  In the first method of restarting the sewing operation, when the thread winding operation is completed, the CPU 190 notifies the operator of the end of the thread winding operation through the display screen 176 and / or the safety ensuring means 228. Then, after confirming the end of the thread winding operation by the display screen 176 and / or the safety ensuring means 228, the operator operates the reverse stitching switch 301 to move the sewing product S forward by several stitches in order to perform over-sewing. After returning, the start / stop switch 238 for turning ON / OFF the sewing operation is turned ON to start the sewing machine and restart the sewing operation.

  In the second method of restarting the sewing operation, when the thread winding operation is completed, the CPU 190 automatically informs the operator of the end of the thread winding operation by the display screen 176 and / or the safety securing means 228 and then automatically how many stitches. Return to the previous position, automatically start the sewing machine and restart the sewing operation. This is particularly effective when performing embroidery sewing using the embroidery device 240. If the automatic embroidery machine forms an embroidery pattern by moving the embroidery frame 239 of the embroidery device 240 relative to the needle position, it can return to the front with any number of needles. At the time of the restart, the restart notification means 225 including the display screen 176 and / or the safety ensuring means 228 is operated so that the worker or the surrounding people can easily and reliably recognize the restart. As a result, the safety can be enhanced particularly when the restart is automatically performed.

  The automatic sewing operation is restarted by a program stored in the restart control unit 246 and the CPU 190 or the like. Further, the number of stitches is returned to the front by the program stored in the needle position control unit 242 at the time of resuming sewing, the CPU 190, and the like. Furthermore, the operation of the restart notification means 225 is performed by a program stored in the restart notification control unit 248, the CPU 190, and the like.

  Next, selection of the automatic restart mode and the manual restart mode will be described with reference to FIG.

  FIG. 51 is a flowchart for explaining selection of the automatic restart mode and the manual restart mode of the sewing machine with a lower thread winding device according to the present invention.

  As shown in FIG. 51, the automatic restart mode and the manual restart mode are selected when restarting the sewing operation. First, in step ST600, the restart mode changeover switch 227 (referred to as switch B in FIG. 51) is selected. Is set, that is, when the restart mode changeover switch 227 is turned ON / OFF. If the determination at the step ST600 is OFF (manual restart mode), the sewing machine with a bobbin thread winding device is attached at the next step ST601. Set 1 to manual restart mode and exit. When the sewing machine 1 with the lower thread winding device is set to the manual restart mode, the restart of the sewing operation is started by turning on the start / stop switch 238.

  If the determination in step ST600 is ON (automatic restart mode), in the next step ST602, as in step ST501 in FIG. 44, it is determined whether the pattern type is a practical pattern or an embroidery pattern. If the determination in step ST602 is a practical pattern, the process proceeds to step ST601, and the sewing machine 1 with the lower thread winding device is set to the manual restart mode and the process is terminated.

  If the determination in step ST602 is an embroidery pattern, the process proceeds to the next step ST603 to set the sewing machine 1 with the lower thread winding device to the automatic restart mode, and the process proceeds to the next step ST604 to determine how many stitches the sewing position is. Return to the previous step, proceed to the next step ST605, operate the restart notification means 225 to notify the operator or the surrounding people of the restart, proceed to the next step ST606, start the sewing machine and perform the sewing operation Resume and exit.

  That is, the setting state of the restart mode changeover switch, the type of pattern sewing data selected by the operation of the pattern selection switch 172, the attachment / detachment state of auxiliary parts necessary to form the selected pattern, that is, embroidery sewing Selection of automatic restart mode and manual restart mode when restarting the sewing operation by combining a detection signal or the like sent from the embroidery device sensor 217 for detecting the attachment / detachment state of the embroidery device 240 when performing sewing I do.

  Whether or not the sewing operation is automatically restarted according to the set state of the restart mode changeover switch 227 is determined by the program stored in the restart operation control unit 247 and the CPU 190 or the like. Further, the number of stitches to be returned is stored in the needle position control unit 243 at the time of resuming sewing while the program stored in the needle position control unit 243 at the time of resuming sewing and the CPU 190 are used to return the sewing position in step ST604 to the previous position. And the number of stitches moved when the remaining yarn is consumed by the CPU 190 or the like. Furthermore, the operation of the restart notification means 225 is performed by a program stored in the restart notification control unit 248, the CPU 190, and the like.

  Next, abnormality detection during the sewing operation will be described with reference to the flowchart shown in FIG.

  FIG. 52 is a flowchart for explaining abnormality detection of the sewing machine with a lower thread winding device according to the present invention.

  As described above, the lower thread detection means 214 that also serves as the bobbin rotation state detection means 215 of the present embodiment is based on whether or not the bobbin 22 is rotating and the lower thread DS wound around the bobbin 22 during the sewing operation. Although it is possible to detect the absence of the thread, the presence or absence of rotation of each bobbin after the start of the sewing operation or after the start of the thread winding operation is detected. It is possible to stop the operation of the sewing machine 1 with the bobbin thread winding device by operating the restart notification means 225 after the determination.

  That is, as shown in FIG. 52, in step ST700, the presence or absence of bobbin rotation after the start of sewing is determined based on the sensor output sent from the reflective optical sensor 211 of the bobbin rotation state detecting means 215, and the determination in step ST700 is NO. In the case of the (bobbin stopped state), the sewing machine stops in the next step ST701 as a yarn hooking abnormality, and in the next step ST702, the operator performs necessary error processing. When stopping the sewing machine, it is preferable to operate the restart notification means 225 to display an abnormality and / or warn in order to improve work efficiency.

  If the determination in step ST700 is YES (bobbin rotation state), normal operation is performed in the next step ST703. In step ST704, the presence or absence of bobbin rotation is determined, and the determination in step ST704 is YES (bobbin rotation state). In the case of), the operation state is maintained.

  If the determination in step 704 is NO (bobbin stop state), in the next step ST705, it is determined that the lower thread DS has disappeared from the bobbin 22, and the above-described remaining thread consumption processing is performed. In the next step ST707, it is determined whether or not the bobbin is rotated after the bobbin starts.

  If the determination in step ST707 is NO (bobbin stop state), the sewing machine is stopped as a bobbin winding abnormality in the next step ST708, and the operator performs necessary error processing in the next step ST709. When stopping the sewing machine, it is preferable to operate the restart notification means 225 to display an abnormality and / or warn in order to improve work efficiency.

  If the determination in step ST707 is YES (bobbin rotation state), the process proceeds to the next step ST710, where it is determined whether the bobbin winding has ended, and the determination in step ST710 is NO (a predetermined amount of bobbin winding has ended). If not, the process returns to step ST706 and the thread winding operation process is performed until a predetermined amount of thread winding is completed.

  If the determination in step ST710 is YES (end of winding), the restart notification process described above is performed in the next step ST711, the restart process described above is performed in the next step ST712, and the process returns to step ST704 to perform the sewing operation. Repeat until is finished.

  Whether the sewing operation and the thread winding operation are normal or not is determined by a program stored in the operation state determination control unit 249, the CPU 190, and the like.

  Next, prevention of the thread winding operation during the sewing operation will be described.

  By the program stored in the malfunction prevention control unit 250, the CPU 190, and the like, it is possible to reliably prohibit the thread winding start by turning on the thread winding start / stop switch 177 during the sewing operation.

  Therefore, according to the sewing machine 1 with the lower thread winding device of the present embodiment, the upper thread US in use is not removed, and the bobbin 22 is used only for embroidery stitching on the bobbin 22 without removing the bobbin 22 from the horizontal hook 4. The upper yarn US as the yarn EDS or the lower yarn DS can be easily selected and supplied. That is, the type of the lower thread DS to be supplied to the bobbin 22 can be easily and appropriately selected according to the type of the seam forming the sewing pattern.

  Further, since the driving force transmission means 330 of the sewing machine 1 with the lower thread winding device of the present embodiment rotates integrally with the outer hook 7 by the magnetic force of the magnetic body 332, the bobbin 22 can be easily rotated during the thread winding operation. On the other hand, the driving force transmission means 330 may cause a trouble such as a catch of the lower thread DS in the lower thread DS supply path when an overload is applied to the lower thread DS positioned on the supply side during the yarn winding operation. When the rotation of the bobbin 22 stops, the integral rotation of the driving force transmission means 330 and the outer hook 7 is slipped when the attraction force between the driving force transmission means 330 and the outer hook 7 due to the magnetic force of the magnetic body 332 is exceeded. The rotation of the driving force transmitting means 330 can be easily stopped, and as a result, a part of the driving force transmitting means 330 when a trouble such as a catch of the lower thread DS occurs in the lower thread DS supply path during the thread winding operation. As a result, it is possible to reliably prevent breakage and bobbin rampage, thereby improving safety. Further, the magnetic body 332 can easily maintain the state where the inner hook 18 is rotatably supported on the race surface 7d which is a predetermined position of the outer hook 7. As a result, the inner hook 18 is not connected to the outer hook 7. It can be surely prevented from popping out as necessary.

  Further, the yarn end cutting blade 56 integrally formed at the tip portion of the yarn holding member 48 of the sewing machine 1 with the lower yarn winding device of the present embodiment, during the yarn winding operation for supplying the upper yarn US to the bobbin 22 as the lower yarn DS, By rotating the bobbin 22 during the winding operation, the vicinity of the yarn end of the upper thread US supplied as the lower thread DS to the bobbin 22 can be directly cut, so that the upper thread US supplied as the lower thread DS to the bobbin 22 can be cut. The vicinity of the yarn end can be cut reliably and easily.

  Further, the sewing machine 1 with the lower thread winding device of the present embodiment is always retracted to the sewing machine leg column 1d side in the vicinity of the outer peripheral surface of the outer hook 7, and during the bobbin winding operation, the distal end part from the sewing machine leg column 1d side. The thread holding member 48 formed so as to be able to enter the upper portion of the inner hook 18 has a simple structure and is used for the upper thread US or the embroidery stitch to the bobbin 22 without removing the bobbin 22 from the horizontal hook 4 during the thread winding operation. EDS can be easily supplied. Furthermore, the thread holding member 48 can easily and reliably capture the lower thread US on the bobbin 22.

  Further, the sewing machine 1 with the lower thread winding device of the present embodiment is always retracted to the sewing machine leg column 1d side in the vicinity of the outer peripheral surface of the outer hook 7, and during the bobbin winding operation, the distal end part from the sewing machine leg column 1d side. The thread holding member 48 formed so as to be able to enter the bobbin attaching / detaching concave groove 24 above the inner hook 18 can more easily and reliably capture the lower thread US on the bobbin 22.

  Further, the dedicated thread tension applying means 296 of the sewing machine 1 with the lower thread winding device of this embodiment can apply an appropriate tension to the lower thread dedicated thread EDS supplied to the bobbin 22 during the thread winding operation. The lower thread dedicated thread EDS can be wound in an appropriate state.

  In addition, the horizontal hook 4 which is an eccentric shaft in which the rotation center of the inner hook 18 of the sewing machine 1 with the lower thread winding device of the present embodiment is shifted from the rotation center of the outer hook 7 can be easily hitch stitched during the sewing operation. Thus, the quality of the sewing product can be improved, and a space for arranging the thread trimming device and the lower thread feeding device can be easily secured.

  Further, the rotation transmission mechanism 340 of the sewing machine 1 with the lower thread winding device of the present embodiment can rotate the bobbin 22 in the reverse direction with respect to the rotation direction of the outer hook 7 only during the thread winding operation, and as a result, the bobbin during the thread winding operation. Since the lower thread US can be easily captured by the slit 39 of the 22, the lower thread US can be reliably and appropriately supplied to the bobbin 22.

  Further, the rotation transmission mechanism 340 having the bobbin driving gear 14 of the sewing machine 1 with the lower thread winding device of this embodiment and the bobbin driven gear 35 provided on the lower flange 38 which is one end surface of the flange of the bobbin 22 is used during the thread winding operation. Only the bobbin 22 can be reliably rotated in the reverse direction with respect to the rotation direction of the outer hook 7, and as a result, the lower thread US can be more easily and reliably captured by the slit 39 of the bobbin 22 during the thread winding operation. The lower thread US can be supplied to the bobbin 22 more reliably and appropriately.

  Further, the rotational transmission mechanism 340 having the bobbin driving friction wheel 14A of the sewing machine 1 with the lower thread winding device of the present embodiment and the bobbin driven friction wheel 35A provided on the lower flange 38 which is one end surface of the flange of the bobbin 22 includes a bobbin winding Only during operation, the bobbin 22 can be reliably reversely rotated with respect to the rotation direction of the outer hook 7, and as a result, the lower thread US can be more easily and reliably captured by the slit 39 of the bobbin 22 during the thread winding operation. Therefore, the lower thread US can be supplied to the bobbin 22 more reliably and appropriately.

  In the sewing machine 1 with the lower thread winding device of the present embodiment, the thread winding amount setting switch 174 as the thread winding amount setting means, the thread winding diameter detecting means 160, the thread winding number measuring means 206, and the thread winding amount control unit 197 are wound around the bobbin 22. The amount of the lower thread DU to be rotated can be controlled appropriately and easily, and is applicable not only to the sewing machine 1 with a lower thread winding apparatus according to the present invention but also to various conventional sewing machines with a lower thread winding apparatus. can do.

  Further, a bobbin rotation detected portion 210 formed by alternately and repeatedly arranging a high reflectance portion 210a and a low reflectance portion 210b provided on the flange 37 of the bobbin 22 of the sewing machine 1 with the lower thread winding device of the present embodiment, and The lower thread detecting means 214 comprising the reflection type optical sensor 211 for detecting the bobbin rotation detected part 210 reliably and properly detects the rotation state of the bobbin 22 and the stop state of the bobbin 22 by the reflection type optical sensor 211. In addition, it is possible to easily and reliably detect the absence of the lower thread DS from the bobbin 22 due to a change from the rotating state of the bobbin 22 to the stopped state of the bobbin 22 during the sewing operation. Furthermore, the lower thread detection means 214 can easily detect abnormalities in yarn hooking and winding operation.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.

1 is an external perspective view showing an example of an embodiment of a sewing machine with a bobbin thread winding device according to the present invention. The perspective view which shows the structure of the principal part near a horizontal hook Partially cut sectional view showing the configuration of the main part near the horizontal hook Exploded view showing the configuration of the main parts near the outer hook Perspective view showing lower thread tension means Plan view showing the vicinity of the bottom of the inner hook Vertical section showing bobbin Plan view of FIG. Top view showing the main part of the thread holding member Front view of FIG. Partially enlarged plan view of FIG. The perspective view which shows the principal part of a thread | yarn holding member expression means Perspective view showing the main part near the needle plate The perspective view which shows the principal part of a bobbin drive member moving means Explanatory drawing which shows the structure of the other example of a rotation transmission mechanism An explanatory view showing an example of a dedicated lower thread feeding mechanism and a holding state of the lower thread dedicated thread with respect to the thread holding member Explanatory drawing which shows the structure of the principal part of an example of an upper thread delivery mechanism An exploded perspective view showing a configuration of a main part of an example of a needle bar cutting mechanism. The perspective view which shows the structure of the principal part of an example of a bobbin diameter detection means Plan view of FIG. Explanatory drawing which shows the structure of the principal part of an example of an operation part. The front view which shows the structure of the principal part of an example of an exclusive lower thread holding | maintenance detection means. Side sectional view along line YY in FIG. Side sectional view along line ZZ in FIG. The perspective view which shows the structure of the principal part of an example of a cloth feeding mechanism. The front view of the principal part of FIG. The block diagram which shows an example of a structure of the principal part of a control means Explanatory drawing showing the bobbin winding amount Explanatory drawing showing the limit number of times of bobbin thread winding The front view of the principal part which shows the initial state of the sewing machine with a bobbin thread winding device which concerns on this invention The perspective view of the principal part which shows the state which the thread | yarn holding member of the sewing machine with a bobbin thread winding device concerning this invention protruded outside the sewing machine The front view of the principal part which shows the state which the thread | yarn holding member of the sewing machine with a bobbin thread winding device concerning this invention protruded outside the sewing machine The same figure as FIG. 30 which shows the state before advance start of the thread winding operation | movement of the thread only for the lower thread of the sewing machine with a lower thread winding device based on this invention The figure similar to FIG. 30 which shows the advance state following FIG. Plan view of FIG. The same figure as FIG. 30 which shows the thread winding possible state following FIG. The figure similar to FIG. 30 which shows the lower thread | yarn catchable state following FIG. Positions of the thread catching hook and the lower thread exclusive thread for the threading operation to the lower thread tension means of the lower thread dedicated thread and the cutting operation of the lower thread dedicated thread after the end of the thread winding operation of the sewing machine with the lower thread winding device according to the present invention Explanatory drawing of the main part showing the relationship The perspective view of the principal part which shows the halfway progress in the threading operation | movement of a sewing machine with a bobbin thread winding device which concerns on this invention, and cutting | disconnection operation | movement FIG. 39 is a diagram similar to FIG. FIG. 39 is a diagram similar to FIG. Explanatory drawing which shows the upper thread | yarn capture | acquisition state which the thread | yarn holding member of the sewing machine with a lower thread winding device concerning this invention captured the upper thread | yarn Explanatory drawing which shows the cutting | disconnection operation | movement of the thread end of the upper thread which the thread | yarn holding member of the sewing machine with a bobbin thread winding device which concerns on this invention caught The top view which shows the structure of the principal part of the bobbin thread detection means of the sewing machine with a bobbin thread winding device concerning the present invention. Diagram showing sensor output of reflection type optical sensor of lower thread detection means and output signal of spindle sensor Flowchart for explaining the rotation state of the bobbin of the sewing machine with a lower thread winding device according to the present invention and the determination of the presence or absence of the lower thread wound around the bobbin Flowchart illustrating consumption of remaining yarn of sewing machine with lower thread winding device according to the present invention Flowchart for explaining discrimination between no upper thread and no lower thread of a sewing machine with a lower thread winding device according to the present invention The flowchart explaining an example of selection of automatic bobbin winding mode and manual bobbin winding mode of a sewing machine with a bobbin thread winding device concerning the present invention. Flowchart explaining another example of selection of automatic bobbin winding mode mode and manual bobbin winding mode of the sewing machine with a bobbin thread winding device according to the present invention Flowchart explaining selection of automatic restart mode and manual restart mode of sewing machine with lower thread winding device according to the present invention Flowchart explaining abnormality detection of sewing machine with lower thread winding device according to the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine with bobbin thread winding device 1d Sewing machine leg column 2 Needle bar 3 Needle 4 Horizontal hook (as hook) 7 Outer hook 7d Race surface 7e Outer hook bottom 11 Bobbin driving member 14 Bobbin driving friction wheel 16 Out Pot bottom plate 17 Gear hole 18 Inner hook 18a Adsorbent 22 Bobbin 23 Bobbin storage hole 24 Groove for bobbin attachment / detachment 25 Lower thread tension means 27 Thread introduction port 35 Bobbin driven gear 35A Bobbin driven friction wheel 36 Bobbin central shaft 37 Upper flange 38 Lower Flange 39 Slit 39a Opening 39b Bottom part 41 Groove groove (as yarn catching part) 42 Blade tip 48 Thread holding member 50 Mounting part 53 Thread holding member moving means 56 Thread end cutting blade 58 Thread position regulating part 59 Upper thread holding part 60 Upper thread Locking part 63 Thread holding and catching tip 70 Upper thread rear holding part 73 Dedicated lower thread rear holding part 93 Control means 94 Bobbin driving member moving means 110 Dedicated bobbin thread feeding mechanism 111 Lower thread thread piece 119 Upper thread tension applying device 120 Upper thread feeding mechanism 138 Thread loosening means 140 Needle bar cutting mechanism 160 Bobbin diameter detecting means 168 Lower thread thread piece mounting section 170 Operation unit 180 Dedicated lower thread holding detection means 190 CPU
191 Memory 200 Sewing data storage section 210 Reflective tape (as a bobbin rotation detected section) 211 Reflection type optical sensor 214 Lower thread detection means 215 Bobbin rotation state detection means 217 Embroidery device sensor 221 Upper thread detection means 228 Safety ensuring means 238 Start / Stop switch 239 Embroidery frame 240 Embroidery device (auxiliary parts)
261 Yarn holding member expression means 277 Protruding portion 296 (as yarn holding member expression drive means) 296 Dedicated thread tension applying means 310 Cloth feed mechanism 313 Vertical feed mechanism 327 Solenoid 330 Driving force transmission means 332 Magnetic (as pressure contact member) Body 340 Rotational transmission mechanism S Sewing product US Upper thread DS Lower thread EDS Lower thread dedicated thread

Claims (1)

In a sewing machine with a bobbin thread winding device that can supply bobbin thread to the bobbin without removing the bobbin from the hook,
An embroidery apparatus having an X motor and a Y motor for moving the embroidery frame in the vertical and horizontal directions and detachably mounted on the sewing machine bed;
A bobbin thread spool with a bobbin thread wound around it can be accommodated, at a position on the embroidery device side of the sewing machine bed of the sewing machine bed of the sewing machine body, and at least the embroidery frame of the embroidery device is attached and detached A lower thread spool mounting portion provided at a position where the lower thread spool can be attached and detached without
An upper flange and a lower flange are provided at both ends of the bobbin central axis so as to face each other, and a slit having an opening at the outer peripheral edge is formed in the upper flange, and the outer peripheral surface of the bobbin central axis A bobbin around which a bobbin is wound,
A horizontal hook provided with an inner hook that accommodates the bobbin so as to be freely rotatable, and an outer hook that supports the inner hook in a non-rotating manner in the inside and rotates in synchronization with the upper shaft and is provided with a sword tip for capturing the upper thread. When,
A bobbin driving member that rotationally drives the bobbin during a thread winding operation;
At least the yarn end vicinity of the lower thread supplied thread supplied through the formed yarn hooking groove between the lower yarn thread spool mounting part during the thread winding operation is capable of holding, normally the outer holder tip portion A thread holding member formed so that the tip part can enter above the bobbin during the yarn winding operation;
Is integrally formed on the thread retaining member, the supplied thread tensioning means for imparting tension to the lower thread supplied thread supplied to the bobbin during winding operation,
A sewing machine with a bobbin thread winding device characterized by comprising:

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