JPH1147480A - Bobbin thread winder and bobbin thread winding capacity control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin thread winder which can feed a bobbin thread onto a bobbin without removing the bobbin from a horizontal pot, and a bobbin thread winding capacity control device. SOLUTION: A bobbin thread winding capacity control device is composed of a needle bar cutting and separating mechanism, a bobbin 22 formed therein a slit, a horizontal pot comprising an inner pot 18 and a sword point 42, a bobbin drive member, a bobbin drive member displacing means 94 for retractably moving the bobbin drive member between two positions, a separated position and a coupled position, a thread holding and catching part 48 comprising a needle thread holding part which is normally positioned at a retracted position but is positioned at an ingress position during thread winding operation, a needle thread engaging part and a thread position limiting part, a means 53 for retractably moving the thread holding and catching part 48 between the retracted position and the ingress position, and a thread winding operation control part for controlling the operation of the parts during thread winding operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin thread winding device and a bobbin thread winding amount control device, and more particularly to a bobbin thread winding device suitable for supplying a bobbin thread to a bobbin without removing the bobbin from a horizontal shuttle. And a bobbin thread winding amount control device.

[0002]

2. Description of the Related Art Various bobbin thread winding devices capable of supplying a bobbin thread to a bobbin without removing the bobbin from a horizontal shuttle have been proposed.

[0003] These conventional examples are disclosed in Japanese Patent Publication No. Sho 60-4.
No. 2745 or Japanese Patent Publication No. 3-27230. And Tokiko Sho 60-
No. 42745 or Japanese Patent Publication No. 3-27230 discloses a bobbin thread winding device for a horizontal hook in which, during a thread winding operation, a thread which is scooped by a sword tip of an outer hook and rotates around an inner hook is used for bobbin thread tension spring. The thread is caught in the notch of the bobbin by the rotation of the bobbin and wound up.

[0004]

However, in the above-mentioned conventional bobbin thread winding device, the thread is guided to the notch of the bobbin using the blade point of the outer hook. It is necessary to prevent the bobbin from entering the notch, and there is a problem that the configuration is complicated.

In a conventional bobbin thread winding device,
The lower thread path from the bobbin after thread winding to the cloth passes under the shuttle because the thread hook is applied to the lower thread tension device by the rotation of the blade point of the outer shuttle. However, there is a problem that the tension becomes unstable.

Further, in the conventional bobbin thread winding device, only the upper thread that has been threaded can be wound as the lower thread during the sewing operation. In the case of sewing by using the thread, it is necessary to re-thread the lower thread to be used as the upper thread, and there is a problem that a large amount of labor and time are required at the time of the thread winding operation.

Further, in the conventional bobbin thread winding device, when the bobbin thread to be wound on the bobbin has reached the limit, the bobbin rotating mechanism is released by a mechanical contact. When the bobbin rotation resistance increases and the bobbin rotation mechanism, which has been frictionally engaged, begins to slip when the yarn wound on the bobbin comes into contact with the inner bobbin wall, the bobbin winding amount of the bobbin winding on the bobbin is reduced. It is configured to control only the upper limit, and in the case of a sewing machine for home use, when the fine thread is used as the lower thread, the lower thread is wound on the bobbin more than necessary for sewing. Is
Most of the upper thread wound around the upper thread, which is the lower thread, is wound up on the bobbin.When using a wide variety of lower threads, the number of bobbins according to the thread type is required. There was a problem that. That is, there is a problem that the amount of the lower thread wound on the bobbin cannot be properly controlled.

The present invention has been made in view of the above points, and a lower thread winding device and a lower thread winding amount control capable of supplying a lower thread to a bobbin with a simple configuration without removing the bobbin from a horizontal shuttle. It is intended to provide a device.

[0009]

According to a first aspect of the present invention, there is provided a bobbin thread winding device according to the first aspect of the present invention. The needle bar which reciprocates the needle in the vertical direction in conjunction with the upper shaft is disconnected from the rotation of the upper shaft during the thread winding operation to stop the reciprocating motion of the needle in the vertical direction. A needle bar cutting mechanism that can be held upward, an upper flange and a lower flange disposed opposite to each other at both ends of the bobbin center axis, and the upper flange has an opening at an outer peripheral edge. A bobbin in which a slit is formed and a bobbin thread is wound around an outer peripheral surface of a bobbin center axis between the upper flange and the lower flange, an inner pot disposed in front of a needle and capable of storing the bobbin, Horizontal kettle with outer kettle provided with a sword for catching thread A bobbin driving member disposed on the shaft center of the outer shuttle and rotatable with the outer shuttle, and separating the bobbin driving member from the bobbin during a sewing operation by separating the bobbin driving member from the bobbin during the sewing operation. A bobbin driving member moving means for moving the bobbin driving member and the bobbin so that the bobbin is rotatable between two positions, i.e., a separating position, a bobbin driving member and the bobbin during the bobbin driving operation. The vicinity of the yarn end of the supplied lower thread dedicated yarn can be held, and the front end in the longitudinal direction is always located at the retracted position near the outer peripheral surface of the outer hook, and the front end in the longitudinal direction is set to the inner hook during the winding operation. An upper thread holding portion that is located at an entry position where it has entered above the inside, and is capable of holding a dedicated thread for a lower thread formed at a distal end portion and supplied at the time of a thread winding operation so as to be located above an upper flange of the bobbin; A yarn position regulating unit disposed on the rear end side of the upper yarn holding unit and positioned so that the lower yarn exclusive yarn positioned on the supply side of the upper yarn holding unit during the yarn winding operation can be brought into contact with the upper flange of the bobbin; A yarn holding member comprising: a yarn holding member moving means for moving the upper yarn holding portion of the yarn holding member so as to be able to advance and retreat between two positions of the retracted position and the entering position; A needle bar cutting-off mechanism configured to allow a thread dedicated to a lower thread continuous between the upper thread holding unit and the thread position regulating unit to enter the slit and wind the thread dedicated to a lower thread onto the bobbin; A bobbin driving member moving means and a thread winding operation control section for operating the thread holding member moving means. By adopting such a configuration, it is possible to easily supply the bobbin with the thread dedicated to the lower thread used for embroidery sewing without removing the bobbin from the horizontal hook.

[0010] A feature of the bobbin thread winding device according to the second aspect of the present invention is that a needle is attached to a tip end and the needle is linked to an upper shaft in a vertical direction during a sewing operation. A needle bar disconnection mechanism for cutting off the vertical reciprocation of the needle bar to be reciprocated from the rotation of the upper shaft, stopping the needle reciprocation in the vertical direction, and holding the needle upward, and a bobbin center An upper flange and a lower flange are provided at both ends of the shaft so as to face each other, and a slit having an opening at an outer peripheral edge is formed in the upper flange, and a slit is provided between the upper flange and the lower flange. A bobbin around which a bobbin thread is wound on the outer peripheral surface of the bobbin center axis, an inner pot provided in front of the needle and capable of storing the bobbin, and an outer pot provided with a sword tip for catching the thread. The shuttle and the shuttle are arranged on the axis of the shuttle and rotate integrally with the shuttle. A bobbin driving member, a bobbin driving member, a separation position where the bobbin driving member and the bobbin are separated during the sewing operation and the bobbin is not rotated, and the bobbin driving member and the bobbin during the thread winding operation. The connection position where the connection is made and the bobbin is rotated.
A bobbin driving member moving means for moving forward and backward between positions; and an upper thread supplied as a lower thread during a thread winding operation, and a retracting position in which a longitudinal end portion is always located near an outer peripheral surface of the outer hook. At the time of the bobbin operation, the front end in the longitudinal direction is located at the entry position where it has entered the upper inside of the inner hook, and the upper thread as the lower thread formed at the front end and supplied at the time of the bobbin operation is placed on the bobbin. An upper thread locking portion that can be locked so as to be located above the flange, and a lower portion that is disposed on a rear end side of the upper thread locking portion and that is positioned closer to a supply side than the upper thread locking portion during a thread winding operation. A thread catching member having a thread position regulating portion for positioning an upper thread as a thread so as to be in contact with an upper flange of the bobbin; and an upper thread engaging portion of the thread catching member, the retracting position and the entering position. Can move back and forth between two positions A thread catcher moving means for moving the,
At the time of thread winding operation, the sewing machine is driven to move the needle up and down so that the loop of the upper thread is divided into upper and lower portions of the inner hook by the point of the outer hook and turned, and the upper thread passing over the inner hook is held by the thread catching member. The upper thread engaging portion and the thread position regulating portion are captured by the upper thread engaging portion and the thread position regulating portion. The present invention is characterized by including a needle winding operation control unit that operates the needle bar cutting-off mechanism, the horizontal shuttle, the bobbin driving member moving unit, and the yarn catching member moving unit so as to wind up as a lower thread. By adopting such a configuration, the upper thread as the lower thread can be easily supplied to the bobbin without removing the bobbin from the horizontal shuttle.

A feature of the bobbin thread winding device according to the third aspect of the present invention is that a needle is attached to a distal end portion and the needle is vertically moved in conjunction with an upper shaft during a sewing operation. A needle bar disconnection mechanism capable of disconnecting the vertical reciprocating motion of the needle bar to be reciprocated from the rotation of the upper shaft during the thread winding operation to stop the vertical reciprocating motion of the needle and holding the needle upward; Comprises an upper flange and a lower flange disposed opposite each other at both ends of the bobbin center axis, wherein the upper flange is formed with a slit having an opening at an outer peripheral edge,
A bobbin around which a bobbin thread is wound around an outer peripheral surface of a bobbin center axis between the upper flange and the lower flange, an inner pot disposed in front of a needle and capable of storing the bobbin, and a blade point for catching the thread A horizontal hook having an outer hook provided with a bobbin driving member disposed on a shaft center of the outer hook and integrally rotatable with the outer hook,
The bobbin driving member is separated from the bobbin driving member and the bobbin during the sewing operation to separate the bobbin from the non-rotating state, and the bobbin driving member is connected to the bobbin during the thread winding operation to rotate the bobbin. A bobbin driving member moving means which moves freely between two positions, ie, a connecting position, and one of a lower thread dedicated thread supplied at the time of the thread winding operation and an upper thread supplied as the lower thread is held or captured. Normally, the longitudinal end is located at a retracted position near the outer peripheral surface of the outer hook, and at the time of the bobbin winding operation, the longitudinal tip is located at an entry position in which the inside of the inner shuttle has entered upward. An upper thread holding portion for holding a lower thread dedicated thread supplied at the time of the thread winding operation and an upper thread locking portion for locking an upper thread supplied as a lower thread; An upper thread which is provided on the rear end side of the thread holding section and the upper thread locking section and which is supplied as a lower thread dedicated thread or a lower thread positioned on the supply side from the upper thread holding section and the upper thread locking section during the winding operation. The yarn holding / combining member having a yarn position regulating portion for positioning the upper yarn holding portion and the upper yarn holding portion and the upper yarn engaging portion of the yarn holding / combining member. A thread holding / capturing member moving means for freely moving between two positions, a position and the entering position, and a method of selecting the lower thread dedicated thread as the lower thread to be wound around the bobbin during the thread winding operation. The needle bar cutting-off mechanism, the horizontal shuttle, the lower thread dedicated thread connected between the upper thread holding section and the thread position regulating section so as to enter the slit and wind the lower thread dedicated thread onto the bobbin. Bobbin driving member moving means and said A first thread winding operation control unit that operates a holding / capture combined member moving unit, and, when a upper thread is selected as a lower thread to be wound around the bobbin during a thread winding operation, the sewing machine is driven to move the needle up and down. The loop of the upper thread is divided into upper and lower portions of the inner hook by the outer hook and turned, and the upper thread passing over the inner hook is captured by the upper thread locking portion and the thread position regulating portion of the thread holding / capturing member. Then, the needle bar cutting-off mechanism so that an upper thread connected between the upper thread engaging portion and the thread position regulating portion is inserted into the slit, and the upper thread is wound around the bobbin as a lower thread, A second thread winding operation control unit that operates the horizontal shuttle, the bobbin driving member moving unit, and the yarn holding / combined member moving unit is provided. By adopting such a configuration, it is possible to easily supply the lower thread dedicated thread used for embroidery sewing or the upper thread as the lower thread to the bobbin without removing the bobbin from the horizontal hook.
That is, the type of the lower thread to be supplied to the bobbin can be easily selected according to the seam.

[0012] Further, a feature of the lower thread winding device according to the present invention described in claim 4 is that, in claim 1 or 3, the outer hook is protruded from an outer peripheral surface of the outer hook. An inclined surface for thread separation capable of moving the lower thread dedicated thread located in the vicinity of the outer peripheral surface of the outer shuttle when rotating in the forward direction in a direction separating from the outer shuttle, and the lower thread exclusive thread to the bobbin during the winding operation. After the end of the thread winding operation when selected as the lower thread to be wound,
After the yarn holding member or the yarn holding / capturing member is positioned at the yarn capturing position above the retreat position, the outer hook is rotated to remove the lower thread dedicated thread located near the outer peripheral surface of the outer hook. The horizontal shuttle, the yarn holding member moving means or the yarn holding / capturing member moving means so as to be moved in a direction away from the outer hook and held by the upper yarn holding portion of the yarn holding member or the yarn holding / capturing / combining member. And a lower thread re-holding operation controller for operating the lower thread. And by adopting such a configuration, the thread winding operation in the case of using the lower thread dedicated thread can be efficiently performed.

A fifth aspect of the present invention provides a lower thread winding device according to the present invention, wherein the upper thread is supplied as the lower thread at the start of the thread winding operation. An upper thread feeding mechanism including a thread loosening means for releasing the upper thread, and at the start of the thread winding operation, a set amount of the upper thread fed from the upper thread feeding device, and the upper thread as the lower thread. And an upper thread controller for operating the thread loosening means to release the upper thread when winding the upper thread. By adopting such a configuration, the upper thread as the lower thread can be easily and reliably supplied to the bobbin without removing the bobbin from the horizontal shuttle.

According to a sixth aspect of the present invention, there is provided a lower thread winding device according to any one of the first to fifth aspects, wherein the lower thread winding device is formed on an outer peripheral surface of the outer hook. A thread catch hook, an outer hook reverse rotation mechanism for rotating the outer hook in reverse, and an upper hook of the inner hook when the outer hook is reversely rotated by the outer hook reverse rotation mechanism fixed to the inner hook. A bobbin thread tension means having a thread introduction port into which a bobbin thread that moves is inserted; After being positioned at the retracted position so that the lower thread located near the outer shuttle connected to the bobbin can be captured by the thread capturing hook, the outer shuttle is rotated in the reverse direction to move the bobbin to the bobbin. The lower thread located near the continuous outer hook is As to enter the mouth, the yarn holding member, the yarn catching member, the thread catching and holding member, in that it further comprises a lower thread tensioning operation unit for operating said outer holder. By adopting such a configuration, it is possible to easily apply appropriate tension to the lower thread wound on the bobbin after the end of the thread winding operation.

[0015] The characteristic of the lower thread winding device according to the present invention described in claim 7 is that in claim 6,
A cutting blade fixed to the outer peripheral surface of the outer hook in a direction substantially opposite to the sword tip in a direction tangential to the blade, and a rotary blade adjacent to the cutting blade when the outer shuttle rotates reversely on the outer peripheral surface of the outer hook. Side, and the thread catching hook and the cutting blade are separated from the thread catching hook until the thread catching hook finishes threading the lower thread on the lower thread tension means. The cutting blade keeps a state in which the cutting blade is separated from a part of the lower thread that is wound around the outer peripheral surface of the outer hook of the thread holding member or the thread catching member or the lower thread that reaches the thread holding and catching member. After the thread tension of the lower thread is completed by the thread tension means, a portion of the lower thread from the thread catching hook to the thread holding member or the thread catching member or the thread holding and catching member wound around the outer peripheral surface of the outer hook is The cutting There lies in the positional relationship so as to contact is set. By employing such a configuration, the lower thread wound on the bobbin can be easily cut from the supply side after the thread winding operation is completed.

A feature of the bobbin thread winding amount control device of the present invention described in claim 8 is that the bobbin thread winding amount supplied to the bobbin without removing the bobbin from the horizontal shuttle during the bobbin winding operation. A bobbin winding amount control device for controlling the amount of bobbin wound around the bobbin; and a bobbin diameter detecting a maximum bobbin diameter of the bobbin wound around the bobbin. Detecting means, a bobbin winding number measuring means for detecting a bobbin winding number during bobbin bobbin winding operation, and a bobbin diameter detecting means when the bobbin bobbin winding amount is set to a maximum set value by the bobbin bobbin amount setting means. Performs the winding operation until the maximum bobbin diameter of the bobbin wound on the bobbin is detected, and when the bobbin winding amount set by the bobbin winding amount setting means is smaller than the maximum set value, the bobbin winding The winding number of revolutions of the bobbins said stored set depending on winding amount set by the amount setting means, the thread winding number measuring means is in that it has a thread winding amount control unit for the thread winding operation until it detects. By employing such a configuration, an appropriate amount of the lower thread can be reliably supplied to the bobbin.

According to a ninth aspect of the present invention, the bobbin thread winding device is supplied to the bobbin at the time of the thread winding operation. The present invention has a bobbin thread winding amount control means for controlling the bobbin thread winding amount. By employing such a configuration, the winding amount of the lower thread to be supplied to the bobbin can be easily controlled.

[0018] Further, a feature of the bobbin thread winding apparatus according to the present invention described in claim 10 is that in claim 9, the bobbin thread winding amount control means is such that the bobbin thread winding amount control means is configured as described in claim 8. It is a quantity control device. By employing such a configuration, an appropriate amount of the lower thread can be reliably wound around the bobbin.

[0019] A feature of the bobbin thread winding device according to the present invention described in claim 11 is that the bobbin thread wound around the bobbin according to any one of claims 1 to 7, A thread winding amount setting means for setting a thread winding amount of the bobbin; a thread winding diameter detecting means for detecting a maximum thread diameter of a bobbin wound on the bobbin; Means, the limit number of bobbins wound on the bobbin is larger than the bobbin bobbin rotation speed up to the maximum bobbin diameter for a thick yarn, and the bobbin bobbin up to the maximum bobbin diameter for a fine yarn. A limit thread number setting unit that is set to be smaller than the thread winding speed, and when the bobbin winding amount of the lower thread is set to a maximum set value by the bobbin winding amount setting unit, the bobbin diameter detecting unit sets the maximum yarn winding amount to Either the winding diameter is detected, or the thread winding operation is performed until the thread winding number measuring unit detects the limit thread winding number set by the limit thread winding number setting unit. If the number is smaller than the maximum set value, the bobbin winding speed is set according to the bobbin winding amount set by the bobbin winding amount setting unit, and the bobbin winding number measuring unit detects the bobbin bobbin winding speed set. And a thread winding amount control unit that performs a thread winding operation until the operation is completed. By adopting such a configuration, it is possible to reliably and easily prevent the bobbin thread from being excessively wound around the bobbin.

Further, the characteristic of the lower thread winding device according to the present invention described in claim 12 is any one of claims 1, 3 to 7, and 9 to 11. In the above item, there is further provided a dedicated lower thread holding detecting means for detecting whether or not the lower thread dedicated thread supplied at the time of the thread winding operation is held by the thread holding member or the thread holding / capturing member. Then, by adopting such a configuration, it is possible to easily detect whether or not the start of the thread winding operation using the lower thread dedicated thread is appropriate.

The characteristic of the lower thread winding device according to the present invention described in claim 13 is that in any one of claims 3 to 7, and 9 to 11,
A sewing data storage unit for storing a plurality of pattern sewing data;
A pattern selecting means for selecting desired pattern sewing data from the plurality of pattern sewing data; selecting a lower thread to be supplied to a bobbin in accordance with the pattern sewing data selected by the pattern selecting means; And an automatic setting unit for automatically setting the value. By adopting such a configuration, it is possible to automatically select the lower thread and set the thread winding amount of the lower thread in accordance with the pattern sewing data, thereby facilitating the operation.

In the thirteenth aspect of the present invention, in the thirteenth aspect, when the exclusive lower thread holding detecting means detects the lower thread exclusive thread, The present invention further comprises an erroneous winding operation preventing unit for invalidating the thread winding operation of the lower thread only when the exclusive lower thread holding detecting means does not detect the lower thread exclusive thread. By adopting such a configuration, for example, when the thread for exclusive use of the lower thread is selected as the lower thread to be supplied to the bobbin, setting such as forgetting to thread the thread for the lower thread on the thread holding member or the thread holding / capturing member is also performed. When the state does not match the state of the bobbin thread winding device, it is possible to invalidate the thread winding operation and prevent a malfunction.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIGS. 1 to 21 show an embodiment of a bobbin thread winding device according to the present invention. FIG. 1 is a perspective view showing the structure of a main part near a horizontal shuttle, and FIG. FIG. 3 is a perspective view showing the lower thread tension means, FIG. 4 is a plan view showing the vicinity of the bottom of the inner hook, FIG. 5 is a vertical sectional view showing a bobbin, and FIG. 5 is a plan view of FIG. 5, FIG. 7 is a plan view showing a main part of a thread holding / capturing member, FIG. 8 is a front view of FIG. 7, FIG. 9 is a perspective view showing a main part of a bobbin driving member moving means, and FIG. Is an explanatory view showing a configuration of a main part of an example of a dedicated lower thread feeding mechanism, FIG. 11 is an explanatory view showing a configuration of a main part of an example of an upper thread feeding mechanism, and FIG. 12 is a main part of an example of a needle bar removing mechanism. 13 is an exploded perspective view showing the configuration of FIG. 13, FIG. 13 is a perspective view showing the configuration of a main part of an example of a thread winding diameter detecting means, FIG. 14 is a plan view of FIG.
FIG. 15 is an explanatory diagram showing a configuration of a main part of an example of an operation unit.
6 is a front view showing a configuration of a main part of an example of a dedicated lower thread holding detecting means, FIG. 17 is a side sectional view taken along line YY of FIG. 16, and FIG. 19 is a block diagram showing the configuration of the control unit, FIG. 20 is an explanatory diagram showing the bobbin thread winding amount, and FIG. 21 is an explanatory diagram showing the limit bobbin winding number.

The bobbin thread winding apparatus according to the present embodiment is used for a sewing machine for performing embroidery stitching.
As the lower thread to be supplied to the bobbin, a thread dedicated to the lower thread or an upper thread can be selected.

As shown in FIGS. 1 and 2, the bobbin thread winding apparatus 1 of the present embodiment reciprocates in the vertical direction in conjunction with an upper shaft (both not shown) during a sewing operation by a known needle bar mechanism. It has a horizontal shuttle 4 disposed in front of the needle 3 attached to the tip of the moving needle bar 2. The horizontal shuttle 4 is disposed inside a sewing machine frame (not shown) so as to be located below the needle plate 5 shown in the upper part of FIG. 2, and has a well-known needle bar mechanism, a balance mechanism, and a cloth feed mechanism during a sewing operation. And the like to form the desired seam. In addition,
The reciprocating movement of the needle bar 2 in the up and down direction, in which the needle 3 is reciprocated in the up and down direction in conjunction with the upper shaft during the sewing operation, is cut off from the rotation of the upper shaft during the thread winding operation by the needle bar disconnecting mechanism 140 described later. By removing the needle 3, the reciprocating movement of the needle 3 in the vertical direction is stopped, and the needle 3 can be held upward.

The horizontal shuttle 4 has an outer shuttle 7 which rotates in a counterclockwise direction as viewed from above as shown by an arrow A in FIG. This outer pot 7
As shown in FIG. 2, the upper portion 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. 2) meshing with a screw gear (both not shown) fixed to the lower shaft is fixed to the small diameter portion 7 b of the outer hook 7. 8 allows the lower shaft to rotate in conjunction with the rotational movement of the lower shaft which is driven to rotate in conjunction with the upper shaft.

As shown in FIG. 2, a hook shaft 9 formed in a substantially cylindrical shape is provided at the shaft center of the outer hook 7 with the screw gear 8.
The lower end of the shuttle shaft 9 is fixed to a shuttle mount 10 shown in the lower part of FIG. 2 by a screw (not shown) or the like. This hook mount 10
Is attached to a base frame 33 fixed inside a sewing machine frame (not shown). A bobbin driving member 11 whose upper and lower ends protrude from the upper and lower ends of the hook shaft 9 is rotatably and axially movable at the shaft center of the hook shaft 9. The upper end of a bobbin driving member urging spring 12 disposed on the outer peripheral surface of the lower part of the bobbin abuts on the lower end surface of the hook shaft 9 or the hook mounting base 10, and the lower end of the bobbin driving member urging spring 12 is driven by the bobbin. The bobbin driving member 11 is normally urged downward by contacting the upper surface of the retaining ring 13 attached near the lower end of the member 11. The bobbin driving member 11
A bobbin drive gear 14 is provided at an upper end of the bobbin.
The bobbin drive gear 14 is provided inside a stepped portion 7c connecting the large diameter portion 7a and the small diameter portion 7b of the outer shuttle 7, specifically, the large diameter portion 7a.
Is always fitted in a gear hole 17 of the same shape as the bobbin drive gear 14 provided so as to penetrate in the plate thickness direction at the axial center of an outer hook bottom plate 16 fixed to the inner bottom portion by screws 15. As a result, the bobbin driving member 11 is always
It is made to rotate integrally with.

Inside the large diameter portion 7a of the outer kettle 7, an inner kettle 18 having an upper portion formed in a substantially cup shape with an opening is disposed. The inner pot 18 is configured such that the axis of the inner pot 18 is
The inner shuttle 18 is disposed at a position shifted to the left as viewed from the upstream side in the cloth feeding direction with respect to the axis of the inner shuttle 18. It is rotatably supported by the surface 7d. The horizontal hook 4 in which the axis of the inner hook 18 is displaced from the axis of the outer hook 7 can easily prevent hitch stitches during the sewing operation to improve the quality of the sewn product. It is possible to easily secure a space for disposing a thread trimming device, a lower thread feeding device, and the like which are not used. The inner hook 18 rotates forward with the outer hook 7 due to friction with the outer hook 7 when the outer hook 7 rotates forward, but the rotation of the inner hook 18 is located above the upper end of the outer hook 7. The protrusion 19 (FIG. 1) provided on the outer peripheral surface of the inner hook 18 is fixed to the sewing machine frame by a rotation stopper 20 (FIG. 1).
, So that it can be stopped. The reverse rotation of the inner shuttle 18 when the outer shuttle 7 reversely rotates can be stopped by the inner shuttle reverse stopper 21 having elasticity fixed to the sewing machine frame (FIG. 1). Further, a bobbin storage hole 23 formed in a substantially columnar shape for receiving a bobbin 22 described later is formed in the shaft center portion inside the inner hook 18.
A bobbin attaching / detaching groove 24 having an open upper portion is formed on a part of the peripheral surface of the bobbin accommodating hole 23 in order to easily attach / detach the bobbin 22 to / from the bobbin accommodating hole 23. Further, a bobbin thread tension means 25 (FIG. 1) which also serves as a part of the bobbin storage hole 23 is provided in a part of the upper part of the bobbin storage hole 23 in the circumferential direction.

The bobbin thread tension means 25 is for applying a proper tension to the bobbin thread DS during the sewing operation after winding and supplying the bobbin thread DS to the bobbin 22, as shown in FIG. And a substrate 26 formed in an arc shape. The inner peripheral surface of the substrate 26 is
The inner diameter of the bobbin storage hole 23 is formed to have a curvature substantially the same as the inner diameter of the bobbin storage hole 23 or a slightly larger curvature than the inner diameter of the bobbin storage hole 23. In addition, at the upper end edge of the substrate 26, a thread introduction port 27 into which a lower thread DS moving from right to left in FIG. Has been
The leading end of a thread introduction groove 28 having a width that allows the lower thread DS to pass through and penetrates in the thickness direction is connected to the thread introduction port 27. The rear end of the thread introduction groove 28 is connected to a substantially circular thread engagement hole 29 formed in the board thickness direction and formed in the lower left of FIG. Further, a groove-shaped thread outlet 30 is formed in the upper end edge of the substrate 26 located on the left side of FIG. Also,
A lower thread presser leaf spring 31 indicated by an imaginary line in FIG. As shown in FIG. 3, the turned lower thread DS is inserted into the thread locking hole 2.
The stitches are connected to the seam in a state where a predetermined tension is applied by the lower thread presser leaf spring 31 between the thread 9 and the thread outlet 30. The bobbin presser leaf spring 31 and the substrate 26
Means that the bobbin presser leaf spring 31 is overlaid on the outer peripheral surface of the substrate 26 and then fixed to the inner shuttle 18 with the mounting screw 32.

As shown in FIG. 4, a bottom 23a of the bobbin housing hole 23 shown in FIG. 2 is provided with an axis of the bobbin 22 which coincides with an axis of the inner pot 18 and an axis of the outer pot 7. An inner hook through hole 34 penetrating in the thickness direction is formed so as to include the bobbin driving member 11.
Is raised against the urging force of the bobbin driving member urging spring 12, the bobbin driving gear 14 provided at the upper end of the bobbin driving member 11 can enter. And
When the bobbin driving gear 14 enters the inner hook through hole 34, the bobbin driving gear 14 can mesh with a bobbin driven gear 35 formed on the bobbin 22 described later.

As shown in FIG. 5, the bobbin 22 has a bobbin center axis 36 around which the lower thread DS is wound around the outer peripheral surface, and both ends of the bobbin center axis 36 face each other. Thus, the upper flange 37 and the lower flange 38 are provided. That is, an upper flange 37 is provided at the upper end of the bobbin center shaft 36, and a lower flange 38 is provided at the lower end. When the bobbin driving member 11 rises against the urging force of the bobbin driving member urging spring 12, the lower flange 38 has a lower end surface 38a shown in FIG. A bobbin driven gear 35 meshable with the provided bobbin driving gear 14 is provided with its axis aligned with the lower flange 38, that is, the axis of the bobbin 22. In addition, the upper flange 37 has a structure shown in FIG.
As shown in the figure, the slit 3 having the opening 39a on the outer peripheral edge
9 are formed. Further, the upper flange 37 and the lower flange 38 are arranged in parallel so as to face each other at an interval by the bobbin center axis 36. Further, as shown in FIG. 5, a substantially annular wall portion 40 protruding radially outward is formed at a connection portion of the bobbin center shaft 36 with the upper flange 37. A concave groove 41 is formed between the upper flange 37 and the lower surface.

Returning to FIG. 1, on the outer peripheral surface of the large diameter portion 7a of the outer hook 7, a point 42 for catching an upper thread loop for forming a stitch at the time of the sewing operation, and cutting of the lower thread DS after the thread winding operation are performed. The cutting blade 43 and the jig part 44 are provided. Further, an opening 45 is formed in the cutting blade 43 adjacent to the cutting blade 43 when the outer shuttle 7 rotates in the reverse direction in the rotation direction near the left side in FIG. 1. FIG.
As shown in FIG. 4, the outer peripheral surface of the large diameter portion 7a of the outer hook 7 has a substantially U-shaped flat surface for catching the lower thread DS wound and supplied to the bobbin 22 after the thread winding operation. A thread catching hook 46 is provided so as to face the hook portion 46a (FIG. 4) in the direction of rotation when the outer shuttle 7 rotates in the reverse direction. The hook portion 46 of the thread catching hook 46
As shown in FIG. 4, a thread that can move the lower thread DS located near the outer peripheral surface of the outer hook 7 in a direction away from the outer hook 7 when the outer hook 7 rotates forward as shown in FIG. A separating inclined surface 47 is formed. Further, the cutting blade 43 is provided with the outer hook 7.
The thread catching hook 46 and the cutting blade 43 are fixed to the outer peripheral surface of the thread in such a manner as to face the sword tip 42 in a substantially tangential direction. Until the hooking is completed, the state where the cutting blade 43 is separated from the portion where the lower thread DS from the thread catching hook 46 to the thread holding / capturing member 48 is wound on the outer peripheral surface of the outer hook 7 is maintained. After the thread 46 has been hooked on the thread tension means 25, the cutting blade 43 is wound around the outer surface of the outer hook 7 of the thread DS from the thread catching hook 46 to the thread holding / combining member 48. Are set in such a manner that they come into contact with each other.

As shown in FIG. 1, a thread holding / capturing member 48 is disposed on the right side of the horizontal shuttle 4 in FIG. This thread holding / capturing member 48 becomes the lower thread DS during the thread winding operation, regardless of whether the lower thread DS EDS or the upper thread US is selected as the lower thread DS to be supplied to the bobbin 22 during the thread winding operation. Either one can be held or locked. The thread holding / capturing member 48 has a substantially flat thread holding / capturing portion 49 shown on the left side in FIG. 1 and a rear end portion of the thread holding / capturing portion 49 shown on the right side in FIG. Mounting part 5 extended toward
0. At the tip of the mounting portion 50, a mounting surface 50 extending parallel to the thickness direction of the yarn holding / capturing portion 49 is provided.
a is provided on the mounting surface 50a so as to be substantially parallel to the yarn holding / capturing portion 49.
A pair of the front mounting pin 51 and the rear mounting pin 52 project toward the near side in FIG. 1 so as to be separated from the thread holding / capturing portion 49 at a desired interval. The pair of front and rear mounting pins 51 and 52 are movably supported by a thread holding / capturing member moving means 53 described later.

As shown in FIGS. 7 and 8, the front end of the yarn holding / capturing portion 49 constituting the yarn holding / capturing member 48 at the lower portion in FIG. A substantially saw blade-shaped hanging 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 bobbin 22 during the thread winding operation. At a position adjacent to the leading end side shown in the left side of FIG. 7 of the hook groove 54, it protrudes toward the near side shown in the lower part of FIG. 7 and, as shown in FIG. After being bent and extended, a tongue piece 55 is formed.

A protruding portion 56 protruding toward the near side shown in the lower part of FIG.
Are formed at appropriate intervals.
7 protrudes toward the rear end side shown in the right side of FIG. 7 on the front side of the rear end edge shown in the right side of FIG. 7, and as shown in FIG.
A front tongue piece 57 bent and extended so as to be inclined upward is formed at an appropriate interval from the front end edge of a portion of the protrusion 56 located on the rear end side shown on the right side in FIG. 7. I have. The lower portion of the lower surface of the root of the front tongue piece 57 shown in the upper part of FIG. E
A thread position regulating portion 58 is provided to position the upper thread US supplied as DS or lower thread DS so as to be able to contact the upper flange 37 of the bobbin 22.

The tip of the protruding portion 56 shown on the left side in FIG. 7 is the widest upright portion projecting from the tip edge of the protruding portion 56 shown on the left side in FIG. 6
1 and a horizontal portion 62 extending in the horizontal direction from the upper end of the upright portion 61, the front portion is formed in a substantially horizontal L-shape. The horizontal portion 62 is located on the left side in FIG. 7, and the rear end edge shown in the upper part of FIG. A wide horizontal plane substantially rectangular rear horizontal portion 6 connecting the front horizontal portion 62a and the upper end of the upright portion 61;
2b. An oblique chamfer is formed on a corner of the rear horizontal portion 62b shown at the lower left of FIG. Further, the tip of the front horizontal portion 62a is
As shown in FIG. 8, a guide inclined surface 64 whose thickness gradually decreases toward the distal end is formed at a corner of the upper surface of the yarn holding / capturing distal end 63. Further, a corner portion of the thread holding / capturing tip 63 shown at the lower left of FIG. 7 is chamfered in an R-shape, and the thread holding / capturing tip 63 is
As shown in FIG. 7, the entire surface is formed in a substantially round shape convex toward the front end.

At a substantially central portion in the width direction of the upper surface on the rear end side shown on the right side of the rear tongue piece 55 in FIG. When the thread EDS is selected, a substantially horizontal L-shaped thread guide tongue piece 65 serving as a guide for the lower thread DS has its free end shown in FIG.
It is formed to protrude upward toward the near side shown below.

A thread holding leaf spring 66 is tightly disposed on the upper surface on the distal end side of the thread holding / capturing section 49 by a screw 67 (FIG. 7). The thread holding plate spring 66 is formed with an upper hanging groove 68 having the same shape as the hanging groove 54 formed in the yarn holding / capturing portion 49 in a plane. 7 and protrudes toward the near side shown in the lower part of FIG. 7, and is bent and extended so as to be inclined upward as shown in FIG. The protruded upper tongue piece 69 is formed. Then, the inner side of the root of the contact portion between the upper rear tongue piece 69 and the rear tongue piece 55 moves the lower thread DS when the upper thread US is selected as the lower thread DS to be supplied to the bobbin 22 during the thread winding operation. The upper thread rear holding section 70 is held on the supply side of the regulating section 58.

A hanging groove 71 substantially similar to the upper hanging groove 68 is formed at the rear end edge of the upper hanging groove 68 of the thread holding plate spring 66 shown in FIG. To the right, it projects toward the back side shown in the upper part of FIG.
As shown in FIG. 8, a thread hooking tongue piece 72 bent and extended so as to be inclined upward is formed adjacently. Then, the inner side of the root of the contact portion between the thread hooking tongue piece 72 and the upper surface of the thread holding and catching portion 49 is the lower thread when the lower thread dedicated thread EDS is selected as the lower thread DS to be supplied to the bobbin 22 during the thread winding operation. A dedicated lower thread rear holding section 73 for holding the dedicated thread EDS on the supply side of the thread position regulating section 58 is provided.

The front end of the thread holding leaf spring 66 shown on the left side of FIG.
The lower left corner in FIG. 7 is a thread holding leaf spring tip 74. 7, the leading edge of the thread holding leaf spring 66 shown on the left side in FIG. 7 extends from the leading end 74 of the thread holding leaf spring toward the far end edge shown in the upper part of FIG. 7, as shown in FIG. 7 is formed obliquely inclining toward the end edge side, and a convex portion 75 protruding upward in FIG. Have been. The distal end portion from the thread holding leaf spring distal end 74 to the convex portion 75 is bent and extended so as to be inclined upward and toward the distal end side as shown in FIG. Then, when the intersection between the leading edge of the thread holding leaf spring 66 and the leading edge of the thread holding / capturing portion 49 is located at the entry position described later during the thread winding operation, the upper thread US as the lower thread DS to be supplied. To the upper flange 3 of the bobbin 22
7 which can be locked so as to be located above
When the abutting portion between the convex portion 75 of the thread holding leaf spring 66 and the upper surface of the thread holding / capturing portion 49 is located at the entry position described later during the thread winding operation, the lower thread dedicated thread ED supplied is supplied.
An upper thread holding portion 59 capable of holding S so as to be located above the upper flange 37 of the bobbin 22 is provided.

In this embodiment, the bobbin 2
The yarn holding / capturing member 48 capable of holding or capturing is used in the case where either the dedicated yarn EDS for the lower yarn or the upper yarn US is selected as the lower yarn DS to be supplied to the bobbin 22. Bottom thread exclusive thread E as DS
In the case where only DS is supplied, instead of the thread holding / capturing member 48, a thread holding member (not shown) having the thread position regulating section 58, the upper thread holding section 59, and the rear holding section 73 for exclusive lower thread is used. Is also good. When only the upper thread US is supplied as the lower thread DS to be supplied to the bobbin 22, instead of the thread holding / capturing member 48, the thread position regulating section 58, the upper thread locking section 60, and the rear thread for the upper thread are used. A not-shown yarn catching member having the holding portion 70 may be used.

Returning to FIG. 1, the yarn holding / capturing member moving means 53 moves the distal end of the yarn holding / capturing member 48 between the retracted position and the entering position. The moving groove 7 through which the front mounting pin 51 and the rear mounting pin 52 projecting from the mounting surface 50a of the member 48 are inserted.
6. The moving groove 76 is formed in the vicinity of an upper part of an upright portion 77a of a mechanism base 77 fixed to the base frame 33 and having a substantially L-shaped cross section, so that the longitudinal direction shown on the left side in FIG. A substantially elongated central portion in the longitudinal direction, which is located in the up-down direction, is connected to the formed elongated horizontal portion 76a and a rear end side of the horizontal portion 76a shown in the right side of FIG. Upper and lower portions 76b formed in an arc shape
Is formed from. After inserting the front ends of the front mounting pin 51 and the rear mounting pin 52 into the moving groove 76 so as to project toward the near side, the retaining rings 78 are respectively inserted into the front ends of the front mounting pin 51 and the rear mounting pin 52. The thread holding / capturing member 48 is attached to the mechanism base 77 by being attached in a known manner.

At the lower right of the upright portion 77a of the mechanism base 77 in FIG. 1 on the front side in FIG. The front end of a pair of front and rear guide pins 80 (only one is shown) projecting from the rear surface of the lower drive plate 79 shown in the back of FIG.
A guide ring 81 formed so as to extend parallel to the horizontal portion 76a of the moving groove 76 is inserted below the moving groove 76 so as to protrude. By being attached in a known manner, they are movably supported along the guide grooves 81.

Further, a flat driving plate 83 is disposed in parallel at an appropriate interval on the upper right side of the standing portion 77a of the mechanism base 77 in FIG. Is inserted through a guide rod 84 disposed on the right side of the upper end edge of the lower drive plate 79, and is attached to the outer peripheral surface of the guide rod 84 on the rear end side shown on the right side in FIG. The urging spring 85 normally urges the distal end side shown in FIG. Then, at the lower edge of the upper drive plate 83,
A locking groove 86 is formed, and a locking pin 87 projecting upward to the right of the guide rod 84 at the upper end edge of the lower drive plate 79 is fitted into the locking groove 86. ,
The drive plate 83 can be prevented from rotating about the guide rod 84. further,
A cam surface 88 is formed on the drive plate 83 to move the tip of the thread holding / combining member 48 up and down along the large diameter portion 7a of the outer shuttle 7 by moving the rear mounting pin 52 up and down. Therefore, a cam groove 89 is formed on the left side of FIG.
9 is formed so that the tip of the rear mounting pin 52 can be fitted. 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 lower drive plate 79. The thread holding / capturing member 48 can move forward and backward as a result.

The yarn holding / capturing member moving means 5
As shown in FIG. 1, the drive motor 91 is electrically connected to a control unit 93 described later, and is driven at a predetermined timing based on a control command sent from the control unit 93. I have.

In this embodiment, the bobbin 2
The yarn holding / capturing member 48 capable of holding or capturing is used in the case where either the dedicated yarn EDS for the lower yarn or the upper yarn US is selected as the lower yarn DS to be supplied to the bobbin 22. Bottom thread exclusive thread E as DS
In the case of supplying only DS, the yarn holding / capturing member moving means 53 is used as a yarn holding member moving means (not shown) for moving the leading end portion of the above-described yarn holding member (not shown) between the retracted position and the entering position. Good. When only the upper thread US is supplied as the lower thread DS to be supplied to the bobbin 22, the thread holding / capturing / member moving means 53 is used.
May be used as a not-shown thread catching member moving means for moving the tip end of the not-shown thread catching member between the retracted position and the entering position.

As shown in FIG. 2, the bobbin driving member 1
A bobbin driving member moving means 94 is provided below the lower part 1. The bobbin driving member moving means 94 has an operating plate 95 formed below the bobbin driving member 11 and formed in a substantially L-shaped plane. As shown in FIGS. 1, 2, and 9, a gear connecting link 96 is continuously provided at the rear end of the operation plate 95 shown on the right side in FIG. A link support pin 97 erected near the lower left corner of the mechanism base 77 in FIG. 1 protrudes toward the near side in FIG. The gear connecting link 96 is attached to the mechanism base 77 such that the gear connecting link 96 is rotatably supported around the link supporting pin 97 by a retaining ring 98 attached to the distal end side of the link supporting pin 97. ing. Further, as shown in FIG. 9, the operation plate 95 is always counterclockwise around the link support pin 97 by the spring 6 having one end locked to the operation plate 95 and the other end locked to the base frame 33. While being urged, the counterclockwise rotation of the operation plate 95 about the link support pin 97 causes the lower end surface of the gear connection link 96 to abut on the positioning pin 99 protruding from the mechanism base 77. Position so that the actuation plate 95 is
Normally, the bobbin driving member 11 is separated below the bobbin driving member 11, the bobbin driving gear 14 disposed at the upper end of the bobbin driving member 11 meshes with the gear hole 17 of the outer hook bottom plate 16, and the bobbin driving gear 14 is It is possible to hold a separated position separated from the lens 35.

As shown in FIG. 9, an arc-shaped groove 100 which is upwardly convex is formed on the lower right side of the gear connecting link 96, and the lower left side of the arc-shaped groove 100 is substantially vertically. An abutment edge 100A extending toward is formed. A substantially bell-crank-shaped stopper 103 rotatably attached by a retaining ring 102 to a support pin 101 erected right below the link support pin 97 of the mechanism base 77 on the contact edge 100A. A stopper pin 105 disposed so as to penetrate the operating arm 104 in the plate thickness direction can be abutted. A spring 107 having one end locked to the drive arm 106 and the other end locked to the base frame 33 is attached to the drive arm 106 shown on the left side of FIG.
The stopper pin 105 is normally biased in the counterclockwise direction by the biasing force of the spring 107, and is formed substantially downward in the left side of the arc-shaped groove 100 in a substantially vertical direction. It is biased toward the edge 100A. Also, on the right side of the upper end edge of the gear connecting link 96 in FIG.
An operating pin 1 protruding from the rear surface of the lower drive plate 79 shown in FIG.
08 is formed with an inclined cam surface 109 which can be brought into contact with or separated from the lower plate 79 in conjunction with the reciprocating movement of the lower drive plate 79. 108 abuts against the inclined cam surface 109, and rotates the gear connection link 96 urged in the counterclockwise direction about the link support pin 97 in the clockwise direction against the urging force of the spring 6; The leading end of the operating plate 95 is raised at a predetermined timing to make contact with the bobbin driving member 11, raise the bobbin driving member 11, and raise the bobbin driving gear 14 disposed at the upper end of the bobbin driving member 11, The bobbin drive gear 14 meshed with the gear hole 17 of the outer hook bottom plate 16 was meshed with both the gear hole 17 of the outer hook bottom plate 16 and the bobbin driven gear 35, thereby connecting the bobbin drive member 11 and the bobbin 22. Connection position So that the can be positioned. Also, while the lower drive plate 79 moves forward toward the forward side shown in FIG. 1, the operating pin 108 comes into contact with the inclined cam surface 109 and is urged counterclockwise about the link support pin 97. The gear connection link 96 to the spring 6
Is rotated clockwise against the urging force of
The stopper pin 105 urged in the counterclockwise direction by the urging force is fitted and engaged with the groove bottom 100a of the arc-shaped groove 100. Furthermore, the arc-shaped groove 10
The stopper pin 105 fitted to the groove bottom 100a of the drive plate 79 moves from the leading end of the lower drive plate 79 while the lower drive plate 79 moves from the forward end shown in the left side of FIG. 1 to the retreat end shown in the right side of FIG. By contacting with a substantially inverted L-shaped stopper pin operating arm 159 disposed so as to protrude, an arc-shaped groove 100 is formed.
When the gear connection link 96 is rotated in the counterclockwise direction by the operating pin 108 separated from the inclined cam surface 109 and counterclockwise urged by the urging force of the spring 6, the circle is formed. It is configured to face a contact edge 100 </ b> A formed below and to the left of the arc-shaped groove 100.

Accordingly, when the lower drive plate 79 shown in FIG. 1 is located at the retreat end shown in the right side of FIG. The drive member 11 and the bobbin 22 can be held at the separated position, and the drive plate lower 7 shown in FIG.
When 9 is located at the forward end shown on the left side of FIG. Has become.

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

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

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.

In the present embodiment, the exclusive lower thread feeding mechanism 110 for supplying the lower thread exclusive thread EDS as the lower thread DS to be supplied to the bobbin 22 performs the lower thread exclusive thread EDS wound on the bobbin 22 during the thread winding operation. The purpose of this is to provide an appropriate tension to the tire. At least before starting the bobbin winding operation, the bobbin thread spool 11 on which the bobbin thread EDS is wound.
1 is rotatably supported at a desired position on a sewing machine frame (not shown). At the start of the bobbin winding operation, as shown in FIG. The lower thread exclusive thread EDS unreeled from the thread spool 111 is supplied to the exclusive lower thread unwinding mechanism 11 located on the supply side.
The thread end is held by the thread holding / capturing member 48 through the thread holding member 0 so as to hold the thread end side.

As shown in FIG. 10, a dedicated lower thread feeding mechanism 1 is provided.
Reference numeral 10 has a lower thread tension pin 112 supported by a mounting stay (not shown). Have been. At the lower end of the lower thread tension pin 112, a fixed plate 114 is disposed so as to be opposed to the movable plate 113. Furthermore, the lower thread tension pin 1
A lower thread tension spring 115 is externally inserted on the outer peripheral surface of the lower thread tension spring 12. Retaining ring 116 attached near the upper end of pin 112
The movable plate 113 can be constantly biased toward the fixed plate 114 by contacting the lower surface of the movable plate 113. That is, the lower thread exclusive thread EDS is provided with the lower thread tension spring 1.
The movable plate 113 is sandwiched between the fixed plate 114 and the movable plate 113 with a biasing force of 15.

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

The upper thread reeling-out mechanism 120 of the present embodiment is used for the upper thread reeling out from the upper thread spool 121 during the sewing operation and the thread winding operation when the upper thread US is supplied as the lower thread DS to be supplied to the bobbin 22. In addition to applying an appropriate needle thread tension to the thread US, the sewing thread is fed out by an amount necessary for forming a stitch during the sewing operation, and then an appropriate timing is obtained when tightening the balance thread using a known balance mechanism (not shown). At the time of the winding operation, the upper thread US is fed out by an amount necessary to lock the upper thread US to the thread holding / combining member 48, and then the balance is driven by a known balance mechanism (not shown). At the start of the thread winding operation of holding the upper thread US at an appropriate timing during thread tightening and winding the upper thread US as the lower thread DS supplied to the bobbin 22 during the thread winding operation. The retained upper thread US is to release at an appropriate timing.

As shown in FIG. 11, the upper thread feeding mechanism 120
Is a drive roller 124 rotatably supported by a drive roller support shaft 123 erected on the upper surface of the mounting plate 122.
have. The upper thread US pulled out from the upper thread spool 121 rotatably supported by an upper thread stand (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. Is in contact with A lower end of the drive roller 124 meshes with a drive gear 126 fixed to a distal end of an output shaft 125 a having a distal end projecting upward from the mounting plate 122 of a driving motor 125 mounted on the lower surface of the mounting plate 122. The driven gear 127 is formed coaxially, and as a result, the drive roller 124 is rotatable by the rotation of the drive motor 125.

The outer peripheral surface of the drive roller 124 is driven by a pair of driven threads that come into contact with and separate from the outer peripheral surface of the drive roller 124 via the upper thread US wound around and in contact with a part of the outer peripheral surface of the drive roller 124. Rollers 128 are arranged in parallel at an interval. Each of these driven rollers 128 is attached to the mounting plate 12.
2 are rotatably supported by driven roller support shafts 130 erected on the upper surface of a movable plate 129 disposed above the movable plate 129. The movable plate 129 has an elongated hole 131 through which the drive roller 124 can be fitted.
Are formed, and the elongated hole 131 is inserted into the drive roller 124.
The lower surface of the movable plate 129 is supported on the upper surface of the driven gear 127 by being fitted to the outer peripheral surface of the driven gear 127. Further, in the vicinity of the left end portion of the movable plate 129 shown on the left side in FIG.
The lower end of a movable plate drive link 133 rotatably supported by a link support pin 132 erected on the upper surface of the lower surface 2 of FIG. With the rotation of the link 133 about the link support pin 132, the moving plate 129 is fitted to the outer peripheral surface of the drive roller 124.
1 moves forward and backward with the movement trajectory restricted, so that each driven roller 128 comes into contact with and separates from the outer peripheral surface of the drive roller 124 via the upper thread US. Further, one end of an urging spring 135 is locked near the other end of the moving plate drive link 133 shown in the upper part of FIG.
The urging force of the urging spring 135 normally urges the movable plate drive link 133 counterclockwise around the link support pin 132 to move the movable plate 129 rightward in FIG. The driving roller 124 is brought into contact with a predetermined contact force, and as a result,
A predetermined upper thread tension can be applied to the upper thread US. In addition, the drive motor 125
As shown by a broken line in FIG. 1, the drive roller 124 is electrically connected to a control unit 93 to be described later, and the drive roller 124 is rotationally driven at a predetermined timing based on a control command sent from the control unit 93, and the upper thread US Is advanced by a set amount.

That is, by keeping each driven roller 128 in contact with the driving roller 124 without rotating the driving motor 125, the holding state in which the upper thread US is held is established. By rotating the 125, the upper thread US can be fed out by a set amount while a predetermined upper thread tension is applied.

In the vicinity of the other end of the movable plate drive link 133 shown in the upper part of FIG. 11, a drive rod 137 having one end attached to a movable output shaft 136a of a solenoid 136 attached to a support stay (not shown). The other end is locked. The output shaft 136a of the solenoid 136 is in a state in which each driven roller 128 abuts against the drive roller 124 by the urging force of the urging spring 135 to apply a predetermined upper thread tension to the upper thread US. Is located at a forward position where the can be held. The solenoid 136 is electrically connected to a control unit 93 to be described later, as indicated by a broken line in FIG. 11, and outputs the solenoid 136 at a predetermined timing based on a control command sent from the control unit 93. By moving the shaft 136a from the advanced position to the retracted position, the biasing spring 135 is extended and each driven roller 12
8 is separated from the drive roller 124 so that the upper thread US in the held state can be released.

The solenoid 136 and the driving rod 1
37, the thread loosening means 138 for releasing the held upper thread US at an appropriate timing at the start of the thread winding operation for winding the upper thread US serving as the lower thread DS supplied to the bobbin 22 during the thread winding operation of the present embodiment. It is composed.

The lower thread DS is applied with an appropriate tension between the upper thread spool 121 and the upper thread feeding mechanism 120 by the upper thread tension applying device 119, and the lower thread DS is moved from the upper thread spool 121 to the upper thread feeding mechanism. The thread runaway when entering 120 is removed. Further, a necessary tension is applied to the thread winding.

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

The needle bar cutting-off mechanism of the present 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 will be described.

As shown in FIG. 12, in the needle bar disconnecting mechanism 140 of the present embodiment, the needle bar 2 is connected to the needle bar gate 14.
1 is supported so as to reciprocate in the vertical direction,
The needle bar gate 141 is a spherical socket portion 143 on an upper portion of a bracket 142 mounted on a sewing head (not shown).
The upper bearing 144 of the needle bar gate 141 is engaged, and the lower portion of the needle bar gate 141 is formed such that the needle bar 2 can reciprocate in a lateral zigzag along the slot 145. When the reciprocating movement of the needle bar, which is reciprocated in the up-down direction in conjunction with the upper shaft (not shown), is removed from the rotation of the upper shaft during the bobbin winding operation, the control unit 9 described later is used.
3, the finger 147 of the bracket 146 at the top end of the needle bar gate 141 is driven by a solenoid (not shown) based on a control command sent at a predetermined timing, and is taken into the elongated thin metal member 148 and the needle bar carrier 149. The wedge 151 is removed from the notch 155 in the drive stud hinge pin 154 via the wedge 151, the cam finger 152, the drive stud 153, the drive stud hinge pin 154, and the like of the attached hooking member 150, and the needle bar 2 is driven by the needle stud 153.
, The tension spring 156 pulls the needle bar 2 to its uppermost position.

As the needle bar disconnection mechanism 140, the vertical reciprocation of the needle bar 2 for reciprocating the needle 3 in the vertical direction in conjunction with the upper shaft is disconnected from the rotation of the upper shaft during the thread winding operation. A needle that can stop the reciprocating motion of the needle 3 in the up-down direction and hold the needle 3 upward, for example, one described in Japanese Utility Model Publication No. 2-36455 may be used.

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 a description thereof will be omitted.

Next, an example of the thread winding 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. 13 and 14, the thread winding diameter detecting means 160 of the present embodiment
The light-emitting element 161 and the light-receiving element 162 are disposed near the upper end of “a” so as to face each other. The light path 16 from the light emitting element 161 to the light receiving element 162
Numeral 3 is located above the outer hook 7 so that the maximum thread winding diameter 164 of the lower thread DS shown by a broken line in FIG. 14 can be detected between the upper flange 37 and the lower flange 38 of the bobbin 22. Have been. Further, an optical path hole (not shown) that matches the optical path 163 is formed in the inner pot 18 in a state where the inner pot 18 is in contact with the inner pot detent 20, and the outer periphery of the large-diameter portion 7 a of the outer pot 7 is formed. On the surface, an optical path through hole (not shown) that matches the optical path 163 with a specific phase is formed.

Here, the specific phase means that an optical path hole (not shown) formed in the inner pot 18 and an optical path through-hole (not shown) formed in the outer peripheral surface of the large diameter portion 7a of the outer pot 7 correspond to the optical path 163. Refers to phases that match linearly. That is, the optical path 163 is opened only in this specific phase section. Then, as long as the diameter of the yarn wound on the bobbin 22 does not block the optical path 163, the light receiving element 162 is turned on in this specific phase section. When the thread is wound and the diameter of the thread interrupts the optical path 163, the light receiving element is turned off.
I do. Since the optical path 163 is disposed at the maximum position of the yarn diameter, the maximum yarn winding diameter 164 can be detected by a change in the signal of the light receiving element 162.

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

The operation unit 170 according to the present embodiment is disposed at a desired position such as a sewing machine frame (not shown).
As shown in FIG. 5, a pattern display screen 171 for displaying a plurality of sewing data stored in the control unit 93 described later in a simple pattern and number is arranged at the lower right of FIG. A pattern selection switch 172 as a pattern selecting means for selecting desired pattern sewing data from a plurality of pattern sewing data by selecting a pattern number displayed on the pattern display screen 171 is disposed above the pattern selection switch 172. On the left side of the pattern display screen 171, a winding thread setting switch 173 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 at the time of the thread winding operation is arranged. Above it, a thread winding amount setting switch 174 as a thread winding amount setting means for setting the winding amount of the lower thread DS wound around the bobbin 22 at the time of the yarn winding operation in three stages of large, medium and small is arranged. ing. Further, a display screen 176 also serving as a warning means 175 for displaying various messages and setting states is disposed above the thread winding amount setting switch 174, and on the left side thereof, ON / OFF of the thread winding operation is controlled. A thread winding start / stop switch 177 is provided. The pattern display screen 171, the pattern selection switch 172, the winding thread setting switch 173, the thread winding amount setting switch 174, the display screen 176 also serving as a warning unit 175, and the thread winding start / stop switch 17.
7 is electrically connected to a control unit 93 described later.

The configuration of the operation section 170 is for explaining only the portion related to the thread winding operation. And so on, of course.

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

Next, an example of the dedicated lower thread holding detecting means will be described with reference to FIGS. 10 and 16 to 18.

As shown in FIG. 10, the dedicated lower thread holding detecting means 180 of this embodiment is provided between the thread holding / capturing member 48 and the dedicated lower thread feeding mechanism 110. As shown in FIGS. 16 to 18, the dedicated lower thread holding detecting means 180 has a main body 181 formed in a substantially horizontally long rectangular shape.
The main body 181 has a lower thread dedicated thread EDS.
The thread groove 182 is formed so as to be recessed along the thread path of FIG. In the thread groove 182, a thread EDS dedicated to a lower thread passing through the thread groove 182 is inserted into a thread groove bottom portion 183 (FIG. 17, FIG. 1).
8) A pair of left and right guide ribs 1 having a substantially triangular plate shape for guiding to 8).
84 are formed at intervals. And the main body 18
16, a through hole 185 (FIG. 16, FIG. 18) penetrating in the vertical direction so as to be orthogonal to the lower thread dedicated thread EDS passing immediately near the thread groove bottom 182. Are formed, and a light emitting element 186 is provided above the through hole 185. Also, the through hole 1
A light receiving element 187 is provided below 85. The light emitting element 186 and the light receiving element 187 are electrically connected to a control unit 93 described later,
Can be sent to the control unit 93 to detect the presence / absence of the lower thread dedicated thread EDS passing immediately adjacent to the control unit 93.

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

As shown in FIG. 19, the control unit 93
At least a CPU 190 and a ROM, RA
It has a memory 191 formed of M and the like, and a controller 192 for driving each part of the sewing machine.

The memory 191 includes at least a thread winding operation control section 193, a lower thread re-holding operation control section 194, an upper thread control section 195, a lower thread tension applying operation section 196, a thread winding amount control section 197, A thread winding number setting section 198;
A sewing data storage unit 200, an automatic setting unit 201, and an erroneous winding operation preventing unit 202 are provided.

The thread winding operation control section 193 includes a first thread winding operation control section 193A and a second thread winding operation control section 193B.
And

The first thread winding operation control section 193A includes:
At the time of the bobbin winding operation, when the bobbin dedicated thread EDS is selected as the bobbin thread DS to be wound around the bobbin 22, the bobbin dedicated thread EDS connected between the upper thread holding portion 59 and the thread position regulating portion 58 is inserted into the slit 39. Insert the thread EDS for the lower thread into bobbin 2
Needle bar cutting mechanism 140, horizontal hook 4,
A program for operating the bobbin driving member moving means 94 and the yarn holding / capturing / member moving means 48 is stored. As a specific example of this program, for example, the needle bar 2
The vertical reciprocation of the needle is removed from the rotation of the upper shaft and the needle 3
After stopping the reciprocating motion in the up-down direction and holding the needle 3 upward, the yarn holding / combining member 48 is positioned at the entering position, and the lower portion connected between the upper yarn holding portion 59 and the yarn position regulating portion 58 is moved downward. The thread dedicated thread EDS is brought into contact with at least the outer peripheral edge of the upper flange 37 of the bobbin 22, and then the bobbin driving member 1
After the first thread 1 is located at the connection position, the outer hook 7 is rotated to allow the lower thread dedicated thread EDS connected between the upper thread holding portion 59 and the thread position regulating portion 58 to enter the slit 39 so that the lower thread dedicated thread E
Needle bar cutting mechanism 14 so that DS is wound around bobbin 22
0, the horizontal shuttle 4, the bobbin driving member moving means 94, and the yarn holding / combining member moving means 53 are preferably operated.

Incidentally, the program of the first thread winding operation control section 193A is not limited to the above-mentioned specific example, and the timing for cutting off the needle bar 2 from the rotation of the upper shaft and holding the needle 3 above, the thread The timing of positioning the holding / capturing member 48 at the entry position, the timing of positioning the bobbin driving member 11 at the coupling position, and the timing of rotating the outer shuttle 7 may be determined in a front-back relationship depending on the design concept or the like.

The second thread winding operation control section 193B includes:
When the upper thread US is selected as the lower thread DS to be wound on the bobbin 22 at the time of the thread winding operation, the sewing machine is driven to move the needle 3 up and down, and the loop of the upper thread US is moved by the blade 42 of the outer hook 7 to the inner hook. 18, the upper thread US passing through the inner shuttle 18 is captured by the upper thread locking section 60 and the thread position regulating section 58 of the thread holding / combining member 48. The needle bar cutting mechanism 140, the horizontal shuttle 4, and the bobbin driving member so that the upper thread US connected between the upper thread US and the thread position regulating unit 58 is inserted into the slit 39 and the upper thread US is wound around the bobbin 22 as the lower thread DS. A program for operating the moving means 94 and the yarn holding / capture 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 at the time of the thread winding operation, the sewing machine is driven after the thread holding / capturing / combining member 48 is positioned at the entry position, and the needle 3 is reciprocated one time in the vertical direction. By operating the upper thread US, the loop of the upper thread US is divided into upper and lower portions of the inner shuttle 18 by the sword tip 42 of the outer shuttle 7 and turned. Then, the needle bar 2 is caught by the thread position regulating portion 58, and then the vertical reciprocation of the needle bar 2 is cut off from the rotation of the upper shaft, the vertical reciprocation of the needle 3 is stopped, and the needle 3 is held upward. After that, the bobbin driving member 11 is positioned at the connection position, and then the outer hook 7 is rotated to
The upper thread US connected between the first thread 0 and the thread position regulating section 58 is inserted into the slit 39, and the upper thread US is inserted into the bobbin 22 with the lower thread DS.
It is preferable that the needle bar cutting mechanism 140, the horizontal shuttle 4, the bobbin driving member moving means 94, and the yarn holding / capturing / member moving means 53 be operated so as to take up.

The program of the second thread winding operation control section 193B is not limited to the above-described specific example, and the timing at which the needle bar 2 is cut off from the rotation of the upper shaft and the needle 3 is held upward, The timing of positioning the holding / capturing member 48 at the entry position, the timing of positioning the bobbin driving member 11 at the connection position, and the timing of rotating the outer shuttle 7 may be determined in a front-back relationship according to the design concept or the like. Further, as the thread winding operation control section 193 when the lower thread DS EDS or the upper thread US is used as the lower thread DS wound on the bobbin 22, the first thread winding operation control section 193A and the second thread winding operation control section 19 are used.
Any structure having any one of 3B may be used.

The bobbin thread re-holding operation control section 194 sets the thread holding / capturing member 48 after the bobbin winding operation when the bobbin dedicated thread EDS is selected as the bobbin thread DS to be wound around the bobbin 22 during the bobbin winding operation. After being positioned at the yarn catching position, 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 thread holding / capturing member 48 is moved. A program for operating the horizontal shuttle 4 and the thread holding / capturing member moving means 53 so as to move the thread holding / capturing / combining member 48 to the retracted position after being held by the upper thread holding portion 59 is stored.

The upper thread control section 195 controls the upper thread US fed from the upper thread feeder 120 to a predetermined amount, and sets the bobbin 22 as the lower thread DS as the lower thread DS.
A program for operating the yarn loosening means 138 to release the upper thread US when winding S is stored.

When only the lower thread dedicated thread EDS is used as the lower thread DS to be wound on the bobbin 22, a conventionally known upper thread feeding device 120 may be used.

In the bobbin thread tension applying section 196, after the bobbin winding operation is completed, the thread located near the outer hook 7 connected to the bobbin 22 is retracted so as to be located below the upper surface of the outer peripheral surface of the outer hook 7. After being positioned at a higher yarn catching position and enabling the yarn catching hook 46 to catch the yarn located near the outer shuttle 7 connected to the bobbin 22, the outer shuttle 7 is rotated in the reverse direction.
A thread holding / capturing member 48 is provided so that the thread located in the vicinity of the outer shuttle 7 connected to the bobbin 22 enters the thread introduction port 27.
And a program for operating the outer hook 7 are stored. Further, the lower thread tension applying operation unit 1 in the present embodiment
A program 96 stores, as the outer hook reverse rotation mechanism 205, the reverse rotation of the outer hook 7 by controlling the rotation direction of a sewing machine motor (not shown).

When the winding amount of the lower thread DS is set to the maximum set value (large) by the winding amount setting switch 174 as the winding amount setting means, the yarn winding diameter detecting means 160 is provided to the winding amount control section 197. The bobbin winding operation is performed until the maximum bobbin diameter is detected or the bobbin winding number measuring means 206 detects the limit bobbin winding number set by the bobbin bobbin winding number setting section 198, and the bobbin winding amount set by the bobbin winding amount setting switch 174. If the amount is smaller than the maximum set value, the bobbin 22 sets the bobbin rotation speed in accordance with the bobbin amount set by the bobbin amount setting switch 174, and the bobbin 2 set by the bobbin number measuring means 206.
A program for performing the bobbin winding operation until the bobbin rotation number 2 is detected is stored.

In the thread winding amount control section 197 according to the present embodiment, the number of rotations of the sewing machine motor (not shown) after the bobbin 22 starts the thread winding operation is detected by the optical sensor as the thread winding number measuring means 206. A program for detecting the number of rotations of the bobbin 22 by comparing the number of rotations of the sewing machine motor with a conversion table stored in advance is stored.

When the limit number of times of thread winding is not used as the thread winding amount control section 197, when the thread winding amount of the lower thread DS is set to the maximum set value (large) by the thread winding amount setting switch 174 as the thread winding amount setting means. The bobbin winding operation is performed until the bobbin diameter detecting means 160 detects the maximum bobbin diameter 164 of the bobbin thread DS wound on the bobbin 22, and the bobbin winding amount set by the bobbin winding amount setting switch 174 is smaller than the maximum set value. In this case, the winding amount setting switch 17
A program for setting the bobbin rotation speed of the bobbin 22 in accordance with the bobbin winding amount set in Step 4 and performing a bobbin winding operation until the bobbin winding number measuring means 206 described later detects the set bobbin 22 bobbin winding speed is sufficient. .

The bobbin winding amount of the lower thread DS set by the bobbin winding amount setting switch 174 is set with reference to the middle yarn. That is, as shown in FIG. 20, the amount of the yarn wound around the bobbin 22 is set so as not to protrude from the bobbin, and is managed by the diameter of the yarn wound around the bobbin 22. This is set as the maximum thread diameter (large) 164, and the thread winding is executed until the maximum thread diameter 164 is detected by the thread diameter detecting means 160. And the maximum thread diameter (large) 1
When the bobbin winding amount (medium) or (small) is smaller than 64, the bobbin rotation speed is managed. The number of windings (medium) is the number of windings (2/3) n and the amount of windings (small) is n for the number of windings n for winding the medium-sized yarn shown in FIG. 20 to the maximum winding diameter 164. ) Decreases as the number of times of thread winding (３) n. For this reason, the maximum winding diameter 164 in the winding amount (large) is the same as the winding diameter of the yarn regardless of the yarn thickness. The actual diameter of the yarn varies depending on the thread. Ideally, the amount of winding of the lower thread DS is controlled by the length of the thread, but managing the amount of winding of the lower thread DS by the length of the thread requires a complicated and expensive device. By controlling the amount of thread winding of the lower thread DS by the number of times of thread winding, it is possible to easily achieve a value close to the ideal.

It should be noted that reference numeral n in FIGS.
a shows the number of windings when the fine yarn is wound up to the maximum yarn diameter 164, and the symbol nb shows the winding number when the thick yarn is wound up to the maximum yarn diameter 164.

Further, instead of setting the winding amount of the lower thread DS with reference to the middle yarn, the winding amount is set for each thickness of the thin yarn, the middle yarn, the thick yarn and the like. In this case, the operation section 170 may be provided with a thickness selecting means for a thread (not shown).

The limit thread winding number setting section 198 stores the limit thread winding number N. Explaining the limit thread winding number N, when a fine thread is used, when the bobbin thread DS is wound around the bobbin 22 to the maximum thread winding diameter 164,
The amount of yarn wound around the bobbin 22 increases, and in particular, the lower thread DS cannot be used up in a household sewing machine or the like.
Therefore, as shown in FIG. 21, the limit number of thread windings N (n <
N <na) is set, and the thread winding is ended at the limit thread winding number N even if the maximum thread winding diameter 164 is not reached.

Note that the limit number of times of winding may be set for each thickness of yarn such as fine yarn, medium yarn, and thick yarn.

The sewing data storage unit 200 stores a plurality of sewing patterns such as embroidery stitches and linear stitches, as well as cloth feed pitch, needle pitch, needle width, etc. for forming stitches based on these sewing patterns. And various data such as the type of the upper thread US and the lower thread DS used according to the sewing pattern, the type of the lower thread DS to be supplied to the bobbin 22 during the thread winding operation, the thread winding amount, and the limit number of times of thread winding are stored. ing.

The automatic setting unit 201 includes the operation unit 1
Selection of the lower thread DS to be supplied to the bobbin 22 in accordance with the pattern data selected by the pattern selection switch 172 as the pattern selection means 70, that is, whether to use the lower thread dedicated thread EDS as the lower thread DS to be supplied to the bobbin 22. Or use the upper thread US and / or bobbin 2
A program for automatically setting the thread winding amount of the lower thread DS to be supplied to No. 2 is stored.

That is, in this 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 various settings can be made. The settings can be set manually.

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 lower thread D to be supplied to the bobbin 22 is set as the automatic setting section 201.
It is preferable to store a program capable of automatically setting various settings of a portion excluding a portion related to the selection of S.

The erroneous winding operation preventing section 202 determines whether the set state matches the state of the lower thread winding device 1 and determines whether the set state matches the state of the lower thread winding device 1. If not, that is, the exclusive lower thread holding detecting means 1
When the exclusive lower thread 80 detects the lower thread exclusive thread EDS, the upper thread US performs the thread winding operation of the upper thread US. The program to be invalidated is stored.
When the thread winding operation is invalidated, the warning means 17
The display unit 176 of the operation unit 170, which also functions as 5, displays a warning as a message on the screen, and stores a program for driving a buzzer (not shown).

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

The bobbin thread winding device 1 according to the present embodiment transfers the empty bobbin 22 to the inner hook 18 when the bobbin thread DS runs out during the sewing operation or when the bobbin thread DS is wound in preparation for sewing. Use the machine after setting it and supplying power to the sewing machine.

The lower thread winding device 1 of the present embodiment
Is started by operating the pattern selection switch 172 of the operation unit 170 shown in FIG. 15 to select a pattern. By operating the pattern selection switch 172 to select a pattern, the automatic setting unit 201 selects the lower thread DS from the various data stored in the sewing data storage unit 200 according to the pattern selected by the pattern selection switch 172. Automatically set the thread winding amount, winding thread, thread winding operation, etc. For example, in the case of embroidery sewing, the thread winding amount is (large)
In the case of straight sewing, the winding amount is set to (medium) and the winding yarn is set to an upper thread US or the like. At this time, the control unit 93 performs the control operation of the thread winding operation control unit 193 as the first thread winding operation control unit 19.
In addition to selecting either 3A or the second thread winding operation control unit 193B, various operations related to the thread winding operation and an operation sequence are set.

It is to be noted that the thread winding amount, the winding thread and the like can be changed manually by operating the winding thread setting switch 173, the thread winding amount setting switch 174 and the like, that is, the setting by the manual operation is also possible. .

When the automatic setting or the setting by manual operation is performed, the erroneous winding operation preventing unit 202 determines whether or not the set state and the state of the lower thread winding device 1 match with each other. If the state does not match the state of the bobbin thread winding device 1, that is,
When the exclusive lower thread 80 detects the lower thread exclusive thread EDS, the upper thread US performs the thread winding operation of the upper thread US. The warning is invalidated, a warning is displayed on the display screen 176 of the operation unit 170 that also functions as the warning unit 175, or a buzzer (not shown) is driven. As a result, the erroneous winding operation preventing unit 202 prevents the erroneous operation from occurring, and the warning unit 175 allows the operator to easily recognize various warnings.

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

When the bobbin thread absence detecting means such as an optical sensor (not shown) is provided, when the bobbin thread absence detecting means detects that the lower thread DS of the bobbin 22 has disappeared during the sewing operation, Stop the sewing machine and then
The thread winding operation of the lower thread DS is started under a preset condition.

The bobbin thread winding device 1 of the present embodiment selects 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 for supplying to the bobbin 22, the thread is not hooked on the thread holding / capturing / combining member 48, and the thread is Keep it in a state where you do not have it.
A lower thread D for supplying a lower thread exclusive thread EDS to the bobbin 22 is provided.
When used as S, the thread EDS dedicated to the lower thread is previously threaded to the thread holding / capturing member 48 via the dedicated lower thread feeding device 110 as shown in FIG.

Next, the winding operation of the bobbin thread is shown in FIG.
26 will be described with reference to FIG.

FIGS. 22 to 26 show the winding operation of the bobbin thread dedicated to the bobbin thread. FIG. 22 is a front view of a main part showing the initial state of the bobbin bobbin winding apparatus according to the present invention during the bobbin winding operation. FIG. 24 is a view similar to FIG.
Is a view similar to FIG. 22 showing a forward movement state, FIG. 25 is a plan view of FIG. 24, and FIG. 26 is a view similar to FIG.

As shown in FIG. 22, in the initial state of the lower thread winding device 1 during the sewing operation or when the sewing machine is stopped, the thread holding / capturing / combining member 48 is moved by the thread holding / capturing / combining member moving means 53. The distal end in the longitudinal direction of the capturing / combining member 48 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 / capturing / combining member moving means 53 are located at the retreat ends shown in the right side of FIG.
Reference numeral 2 denotes a state in which the distal end thereof is in contact with the vicinity of the distal end of the cam surface 88 of the cam groove 89 from above, in a state of being located above the upper and lower portions 76b of the moving groove 76 of the yarn holding / capturing / member moving means 53.

The bobbin driving member 11 is separated from the bobbin 22 by the bobbin driving member moving means 94 and is located at a separated position where the bobbin 22 is in a non-rotating state. That is, since the lower drive plate 79 is located at the retreat end,
The operating pin 108 of the bobbin driving member moving means 94 is separated from the inclined cam surface 109, the gear connecting link 96 is urged counterclockwise around the link support pin 97 by the urging force of the spring 6, and the operating plate 95 is moved to the bobbin. The bobbin driving member 11 is separated downward below the lower end of the driving member 11, and is urged downward by the urging force of the bobbin driving member urging spring 12. 14 is separated downward from the bobbin driven gear 35,
It 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 is in contact with the stopper pin operation arm 159 and faces a contact edge 100A formed on the lower left side of the arc-shaped groove 100.

During the sewing operation, the inner hook 18
The upper thread US rotating around the bottom of the inner hook 18 and the bobbin driving gear 1
4 passes through the gap formed between the upper surface of C.

Then, the thread winding start / stop switch 177 is operated to send a control command from the control section 93 to each section to start the thread winding operation. When a bobbin thread absence detecting unit such as an optical sensor (not shown) is provided, a control command is automatically sent from the control unit 93 to automatically start a thread winding operation.

When a control command is sent from the control section 93 to each section, first, the dedicated lower thread holding detecting means 180 holds the lower thread dedicated thread EDS supplied at the time of the thread winding operation on the thread holding / capturing member 48. The detection result is sent to the control unit 93, and the erroneous winding operation preventing unit 202 of the control unit 93 determines whether the set state matches the state of the lower thread winding device 1. If the dedicated lower thread holding detecting means 180 does not detect the lower thread dedicated thread EDS, a warning message is displayed on the display screen 176 of the operation section 170 which also functions as the warning means 175 without performing the thread winding operation. And drives a buzzer (not shown) to end the process. Thereby, malfunction can be reliably prevented.

When the dedicated lower thread holding detecting means 180 detects the lower thread dedicated thread EDS, the drive motor 91 of the thread holding / capturing member moving means 53 is controlled based on a control command sent from the control section 93. Is driven, and the lower drive plate 79 of the yarn holding / capturing / member moving means 53 is moved to the guide groove 8 of the mechanism base 77.
It moves forward along the direction 1 in a direction approaching the horizontal shuttle 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 is transmitted to the upper drive plate 83.
Moves forward together with the lower drive plate 79. Then, the drive plate 8
3 is advanced, and the rear mounting pin 52 of the thread holding / capturing member 48 is pushed downward by the cam surface 88 of the cam groove 89. As a result, the rear mounting pin 52
Move downward from above the upper and lower portions 76b of the moving groove 76. Since the center-to-center distance between the rear mounting pin 52 and the front mounting pin 51 is the same as the radius of curvature of the upper and lower portions 76b formed in an arc shape of the moving groove 76, the thread holding / capturing member 48 is 22, rotates in the clockwise direction in FIG. 22 around the mounting pin 52. As shown in FIG. 23, the longitudinal end of the thread holding / capturing / combining member 48 extends upward along the outer peripheral surface of the outer hook 7 as shown in FIG. And it is in a state where it can move forward. Further, the stopper pin 105 contacts the contact edge 100A in a state of contact with the stopper pin operation arm 159.

Next, when the drive plate lower 79 further moves forward by the further drive of the drive motor 91, the thread holding / capturing member 48 moves forward along the moving groove 76, and FIG.
As shown in FIGS. 24 and 25, each of the components shown in FIG. The member 48 stops at the entry position where the distal end of the member 48 has entered the upper inside of the inner hook 18 and is in a forward movement state. At this time, the operating pin 108 of the bobbin driving member moving means 94 is
Abut. The stopper pin 105 contacts the contact edge 100A in a state where the stopper pin 105 is separated from the stopper pin operation arm 159.

Next, when the drive motor 91 is further driven, the lower drive plate 79 is further moved forward, and the respective portions shown in FIGS. 24 and 25 are operated as shown in FIG. Pushes down the inclined cam surface 109, the gear connecting link 96 rotates clockwise, and the operating plate 95 abuts against the lower end of the bobbin driving member 11 to push the bobbin driving member 11 against the urging force of the bobbin driving member urging spring 12. 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 hook bottom plate 16 and the bobbin driven gear 35, and the bobbin driving member 11 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, and the lower drive plate 79 is positioned at the forward end so that the bobbin 22 can be wound. At this time, at the same time, the stopper 10
3 rotates counterclockwise by the urging force of the spring 107 (FIG. 9), and the stopper pin 105 fits into the groove bottom 100a of the arc-shaped groove 100 of the gear connection link 96. Further, the lower drive plate 79 moves forward, but the urging spring 85 contracts in the axial direction, and the movement of the upper drive plate 83 remains stopped. As a result, the yarn holding / capturing member 48 Combined member 4
8 keeps the entry position in which the tip of the inside 8 has entered above the inside of the inner hook 18.

The bobbin 22 in the state where the bobbin can be wound is
As shown in FIG. 8, the positional relationship between the thread holding / combining member 48 and the thread holding / capturing / combining member 48 is such that the lower thread dedicated
Is pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22.

Next, in response to a control command sent from the control unit 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 moves the needle 3 in the vertical direction. The reciprocating motion is stopped, the needle 3 is held upward, and then the sewing machine is driven.

When the sewing machine is driven, the outer hook 7 rotates forward, and the rotation of the outer hook 7 causes the bobbin driving gear 14 at the upper end of the bobbin driving member 11 to rotate forward through the outer hook bottom plate. Then, the bobbin driven gear 35 meshing with the bobbin driving gear 14 is reversely rotated in the direction opposite to the rotation direction of the outer shuttle 7, and the bobbin 22 is reversely rotated in the opposite direction to the rotation direction of the outer shuttle 7.

[0125] By the reverse rotation of the bobbin 22, the oblique connection between the upper yarn holding portion 59 of the yarn holding / combining member 48 pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22 and the yarn position regulating portion 58 is established. The lower thread exclusive thread EDS is caught by the opening 39a of the slit 39 of the bobbin 22, and the lower thread exclusive thread EDS on the supply side, that is, the lower thread spool 111 side, is introduced into the concave groove 41 formed in the bobbin center shaft 36. I will The rotation of the bobbin 22 causes the thread E dedicated to the lower thread to be inserted into the concave groove 41.
When the DS is wound, the lower thread exclusive thread EDS passes over the wall portion 40 downward in FIG. 5 and is wound around the outer peripheral surface of the bobbin center shaft 36, and the bobbin 22 is further rotated to continue the thread winding. Further, the upper yarn holding section 5 of the yarn holding / capturing member 48 is also provided.
The thread EDS for the lower thread held at the thread end 9 is the bobbin 2
The rotation is slightly pulled by the rotation of No. 2 to be short, and it is in a state of jumping out of the slit 39.

The thread E dedicated to the lower thread for the bobbin 22
The winding of DS is performed until the winding amount stored in the yarn winding amount control unit 197 or the limit yarn winding number setting unit 198 is reached, and the winding of the lower thread dedicated yarn EDS on the bobbin 22 is set in advance. , The sewing machine stops based on a control command from 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.

Next, the operation of hooking the lower thread dedicated thread on the lower thread tension means and the operation of cutting the lower thread dedicated thread will be described with reference to FIGS. 27 to 31.

FIGS. 27 to 31 show the operation of hooking the lower thread tension means on the lower thread tension means and the operation of cutting the lower thread exclusive thread. FIGS. 27 and 31 show the lower thread catchable state and FIGS. FIG. 28 is an explanatory view of a main portion showing a positional relationship between the yarn catching hook and the lower thread dedicated yarn, FIG. 29 is a perspective view of a main portion showing a progress of the yarn hooking operation and the cutting operation, and FIG. FIG. 3 is a view similar to FIG.
FIG. 1 is a view similar to FIG. 29 but showing the progress of the process following FIG.

The lower thread tension means 25 for this lower thread dedicated thread EDS
The thread tension required for performing the sewing operation is
This is for applying to the lower thread DS supplied to the bobbin 22.

After the thread winding is completed, the drive motor 91 is driven to rotate in the reverse direction by the control command sent from the control section 93, and the lower drive plate 79 moves backward. Then, the retreating movement of the lower drive plate 79 is as follows. As shown in FIG.
At a position slightly above the retracted position below the outer peripheral surface of the outer hook 7 near the lower position, that is, below the rotational locus of the yarn catching hook 46, the yarn stops at the yarn catching position, and the lower thread can be caught. 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 a state in which the stopper pin 105 is fitted to the groove bottom 100a of the arcuate groove 100 of the gear connecting link 96. The bobbin driving member 11 holds 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 hook bottom plate 16 and the bobbin driven gear 35 to drive the bobbin. The connection position where the member 11 and the bobbin 22 are connected and the bobbin 22 is rotated is maintained. Then, as shown in FIG.
The supply side of the lower thread dedicated thread EDS wound on the bobbin 22 is
The movement of the yarn holding / combining member 48 to the yarn catching position causes the yarn holding / combining member 48 to pull the yarn and bend downward at the outer peripheral angle of the outer hook 7.
9 is locked at the intersection of the leading edge of the thread holding leaf spring 66 of the thread holding / capturing member 48 and the leading edge of the thread holding / capturing portion 49.

Further, in order to perform the thread winding operation by the next lower thread exclusive thread EDS, the upper thread retaining section 59 of the thread retaining / capturing member 48 retains the thread end of the lower thread exclusive thread EDS. Thread ED exclusively for lower thread to capture / combination member 48
The operation can be facilitated by omitting the thread hooking operation of S.

Therefore, in a state in which the lower thread can be caught as shown in FIG. 27, the sewing machine is driven by one rotation of the upper shaft (not shown) by a control command sent from the controller 93. Then, the outer hook 7 is rotated forward, and the thread separating inclined surface 47 of the thread catching hook 46 disposed on the outer peripheral surface of the outer hook 7 is dedicated to the lower thread which is bent downward at the outer peripheral angle of the outer hook 7. Outer hook 7 with thread EDS
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 / capturing member 48, and as a result, the lower thread dedicated thread EDS is lifted up. It can be held by the yarn holding section 59.

Next, according to a control command sent from the control section 93, the drive motor 91 is further driven to rotate in the reverse direction, and when the lower drive plate 79 reaches the retreating end, the respective parts in the lower thread catchable state shown in FIG. It returns to the initial state shown in FIG. At this time, since the distal end of the thread holding / combining member 48 moves downward along the outer peripheral surface of the outer hook 7, the lower end connected between the bobbin 22 and the upper thread holding portion 59 of the thread holding / capturing member 48. The thread dedicated thread EDS is stretched. At the same time, 7
9 by the stopper pin operating arm 159.
The third stopper pin 105 rotates clockwise about the support pin 101, and separates the stopper pin 105 from the arc-shaped groove 100 of the gear connecting link 96. Then, the stopper pin 105 is connected to the arc-shaped groove 1 of the gear connecting link 96.
00 is separated from the groove bottom 100a of the
Is rotated counterclockwise around the link support pin 97 by the urging force of the spring 6, and the operating plate 95 is separated below the bobbin driving member 11, so that the bobbin driving member 11
Is a finger that is separated from the bobbin 22 and returns to the separated position where the bobbin 22 is in a non-rotating state, and the bobbin 22 is in a rotatable free state.

Next, when the sewing machine is driven to rotate in the reverse direction by the control command sent from the control section 93, the outer hook 7 rotates in the reverse direction, and the hook portion 46a of the thread catch hook 46 is positioned near the outer periphery of the outer hook 7. Bobbin 22 and thread holding / capturing member 4
8 is a lower thread dedicated thread ED located between the lower thread 8 and the upper thread holding portion 59.
Capture S. Then, the hook portion 4 of the yarn catching hook 46
When the lower thread 6a rotates backward while catching the lower thread exclusive thread EDS and reaches the position shown in the lower part of FIG. 28, the lower thread exclusive thread EDS coming out of the bobbin 22 is moved to the lower thread tension means 25 as shown in FIG. And passes through the gap between the projection 19 of the inner hook 18 and the inner hook detent 20. The lower thread dedicated thread EDS protruding from below the hook portion 46a of the thread catching hook 46 is wound around the outer periphery of the large diameter portion 7a of the outer hook 7 and connected to the upper thread holding portion 59 of the thread holding / capturing member 48.

Next, by further reversing the rotation of the outer hook 7,
The lower thread dedicated thread EDS which has climbed on the upper edge of the substrate 26 of the lower thread tension means 25 slides on the upper end of the substrate 26 and reaches a position shown diagonally below left in FIG. It is led into the yarn path entrance 27 formed at the edge, and as a result, as shown in FIG.
Enters the yarn introduction groove 28.

Next, due to the further reverse rotation of the outer shuttle 7, the lower thread dedicated thread EDS which has entered the thread introduction groove 28 is shown in FIG.
8 When it reaches the position shown to the left and in the position shown in FIG. 31, it is urged by the urging force of the lower thread presser leaf spring 31 between the thread engaging hole 29 of the lower thread tension means 25 and the thread outlet 30 shown in FIG. As a result, an appropriate lower thread tension required during the sewing operation can be reliably applied to the lower thread dedicated thread EDS.

When the lower thread exclusive thread EDS is located on the left side of FIG. 28, the cutting edge of the cutting blade 43 disposed on the outer hook 7 has come out of the upper thread holding portion 59 shown by the reference symbol B in FIG. Since the lower thread exclusive thread EDS is located near the contact point where the outer thread of the outer hook 7 starts winding around the outer peripheral surface of the outer hook 7, the lower thread exclusive thread EDS wound on the outer peripheral surface of the outer shuttle 7 climbs over the slope of the swaying portion 44 shown in FIG. And is cut by being pressed against the cutting blade 44. Then, at this position, the yarn holding / capturing member 48 is
By cutting the lower thread dedicated thread EDS connected to the upper thread holding portion 59 of the lower thread, the lower thread tension means 25 necessary for binding the stitches
, The length of the lower thread DS can be sufficiently ensured, and the remaining yarn at the yarn end from the upper thread holding portion 59 of the thread holding / combining member 48 can be reduced.

Next, the control unit 93 stops the reverse rotation of the outer hook 7 according to a control command sent from the control unit 93, and the needle bar disconnecting mechanism 140 separates the needle bar 2 from the rotational motion of the upper shaft.
Is connected to the rotation of the upper shaft, the respective portions of the lower thread winding device 1 return to the initial state, and the thread winding operation of the lower thread dedicated thread EDS is completed.

Next, the winding operation of the upper thread will be described with reference to FIGS.
This will be described with reference to FIGS. 22 to 26 and FIG. The description of the same portions as those of the above-described thread winding operation of the lower thread dedicated thread EDS is omitted.

FIG. 32 is an explanatory view showing a state in which the upper yarn is captured by the yarn holding / combining member capturing the upper yarn.

The bobbin winding operation of the upper thread US by the bobbin bobbin winding apparatus 1 of this embodiment is started by operating the bobbin start / stop switch 177 and sending a control command from the control section 93 to each section. When a bobbin thread absence detecting unit such as an optical sensor (not shown) is provided, a control command is automatically sent from the control unit 93 to automatically start a thread winding operation.

When a control command is sent from the control section 93 to each section, first, the dedicated lower thread holding detecting means 180 holds the lower thread dedicated thread EDS supplied at the time of the thread winding operation in the thread holding / capturing member 48. Is detected, the detection result is sent to the control unit 93, and the erroneous winding operation preventing unit 202 of the control unit 93 checks whether the set state matches the state of the lower thread winding device 1. When the dedicated lower thread holding detector 180 detects the lower thread dedicated thread EDS, a warning message is displayed on the display screen 176 of the operation unit 170 that also functions as the warning unit 175 without performing the thread winding operation. And drives a buzzer (not shown) to end the process. Thereby, malfunction can be reliably prevented.

When the dedicated lower thread holding detecting means 180 does not detect the lower thread dedicated thread EDS, the drive motor 91 of the thread holding / capturing member moving means 53 is controlled based on a control command sent from the controller 93. The lower thread winding device 1 located in the initial state shown in FIG. 22 is driven through the state before the start of forward movement shown in FIG. 23 in the same manner as the above-described thread winding operation of the lower thread dedicated thread EDS. In the forward state shown in FIG. 24 and 25, the drive motor 91 is stopped based on a control command sent from the control unit 93.

Next, when the lower thread winding device 1 is stopped in the forward state shown in FIGS. 24 and 25, the sewing machine is rotated by one rotation of the upper shaft (not shown) based on a control command sent from the controller 93. Drive. Then, the needle 3 located at the upper stop position reciprocates one stitch in the vertical direction by the up and down movement of the needle bar 2, and the needle thread loop coming out of the needle hole of the needle 3 is moved forward by the outer shuttle 7. Of the inner pot 18 is captured by the sword tip 42. At this time, the inner pot 18 is
The upper thread US passing through the inner hook 18 is divided into upper and lower portions 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 contacts the bottom of the inner hook 18 and the bobbin drive gear 14. It passes through the gap formed with the upper surface. When the upper thread US is wound in the middle of the sewing operation, as shown in FIG. 3, one end of the upper thread US is connected to the seam of the cloth, so that there is no problem. It is important to drive the sewing machine after holding the thread end of the upper thread US by hand or the like.

The upper thread US rotating on the upper surface of the inner pot 18
As shown in FIGS. 24 and 25, since the leading end of the thread holding / combining member 48 has stopped at the entry position where it has entered above the inside of the inner shuttle 18, the thread holding leaf spring shown in detail in FIG. It is inserted into the opening formed by the upper thread locking section 60 formed by the intersection of the leading edge of the thread 66 and the leading edge of the thread holding / capturing section 49. Then, after the blade point 42 is further rotated, after passing through the gap between the protrusion 19 of the inner hook 18 and the inner hook detent 20, the thread holding plate spring 66 shown in detail in FIG. Upper thread rear holding section 7 formed by upper rear tongue piece 69 and rear tongue piece 55 of thread holding / capturing section 49
0 into the opening formed by the inner pot 1
32, the upper thread US comes off, and as shown in FIG.
S is captured by the yarn holding / combining member 48, and the upper yarn is captured. At this time, as shown in FIG. 32, the upper thread US is not retained by the upper thread retaining section 59 but is retained by the upper thread retaining section 60. Holder 7
0 is the lower thread exclusive thread E shown in FIG.
It is stretched so as to be located at the yarn position regulating portion 58 in a manner similar to DS.

The upper thread US at the time of the sewing operation is moved to the seam by the drive motor 125 driven by the upper thread feeding mechanism 120 shown in FIG. Only the necessary amount of yarn is paid out, and at the time of yarn tightening, the drive motor 125 is stopped, and the upper yarn US is held between the drive roller 124 and the driven roller 128, so that an appropriate yarn tension can be obtained.

Further, the upper thread US during the thread winding operation is
The first stitch, which is driven by the horizontal hook 4 immediately after the start of the thread winding operation, does not require the thread amount necessary for the stitch necessary for the sewing operation, but requires the thread amount for the thread path shown in FIG. Also, in order to ensure that the upper thread US is captured by the thread holding / combining member 48, an appropriate tension is required for the upper thread US. Therefore,
In accordance with a control command sent from the control unit 93, the upper thread feeding mechanism 120 feeds out the upper thread US almost equal to or slightly smaller than the thread amount required for the thread path shown in FIG. At the time of thread tightening,
By stopping the drive motor 125 and holding the upper thread US between the drive roller 124 and the driven roller 128,
The upper thread US can be reliably captured by the thread holding and capturing member 48.

When the bobbin thread winding device 1 is stopped in the forward state shown in FIGS. 24 and 25, the bobbin driving gear 14 is separated from the bobbin driven gear 35 downward.

Next, as described above, in response to the control command sent from the control section 93, the needle bar disconnection mechanism 140 disconnects the reciprocating motion of the needle bar 2 in the vertical direction from the rotation of the upper shaft and removes the needle 3 from the upper shaft. Stops the reciprocating movement in the vertical direction, holds the needle 3 upward, and then drives the sewing machine.

Next, the thread holding / capturing member 48 is moved to the upper thread U
After capturing S, as described above by the further drive of the drive motor 91, the respective parts shown in FIGS. 24 and 25 are brought into the thread winding enabled state shown in FIG.

The bobbin 22 in the state where the bobbin can be wound is provided.
As shown in FIG. 8, the upper thread US obliquely connected between the upper thread engaging portion 64 of the thread holding / capturing member 48 and the thread position regulating portion 58 is bobbin. 22 is pressed against the outer peripheral edge of the upper flange 37.

Next, when the sewing machine is driven by a control command sent from the control unit 93, the outer hook 7 rotates forward, and the rotation of the outer hook 7 is controlled by the bobbin driving member 1 via the outer hook bottom plate.
1 and the bobbin driven gear 35 meshing with the bobbin driving gear 14 is reversely rotated in a direction opposite to the rotation direction of the outer hook 7 so that the bobbin 22 Reverse rotation in the direction opposite to the direction of rotation.

Then, by the reverse rotation of the bobbin 22, the upper position of the upper portion 37 of the thread holding / combining member 48 pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22 and the thread position regulating portion 58 are inclined. The continuous upper thread US is caught in the opening 39a of the slit 39 of the bobbin 22, and the bobbin center axis 36
The needle side serving as the supply side, that is, the upper thread US on the upper thread spool 121 is guided into the concave groove 41 formed in the upper thread US. 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 caught by the opening 39a of the slit 39 of the bobbin 22, a part of the thread loosening means 138 is removed. The constituent solenoid 136 is driven, and each driven roller 12 is driven.
8 is released apart from the drive roller 124 and the bobbin 2
By continuing the rotation of 2, the upper thread US is pulled out from the upper thread spool 121, and the thread is further wound. The bobbin 22
The upper thread US coming out of the slit 39 and leading to the cloth is repeatedly rubbed against the edge portion of the slit 39 every time the bobbin 22 rotates and cut.

The winding of the upper thread US on the bobbin 22 is performed until the bobbin 22 reaches the thread winding amount set by the thread winding amount control section 197 or the limit thread winding number setting section 198. When the number of turns reaches the preset thread winding amount, the sewing machine 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 operation of hooking the upper thread as the lower thread supplied to the bobbin to the lower thread tension means and the operation of cutting the upper thread will be described with reference to FIGS.

The lower thread DS supplied to the bobbin 22 is hooked on the lower thread tension means 25 of the upper thread US as the lower thread DS supplied to the bobbin 22 by applying the lower thread tension necessary for performing the sewing operation to the lower thread DS supplied to the bobbin 22. It is for giving.

After the completion of the bobbin winding, the drive motor 91 is driven to rotate in the reverse direction by the control command sent from the control unit 93 and retreats below the drive plate 79, and the components shown in FIG. Returns to the state. The operation of hooking the lower thread tension means 25 on the upper thread US as the lower thread DS supplied to the bobbin 22 is different from the action of hooking the lower thread tension means 25 on the lower thread dedicated thread EDS. Since there is no need to hold the yarn end in the upper yarn holding portion 59 of the dual-purpose member 48, the upper yarn US as the lower yarn DS coming out of the bobbin 22 is used.
Is substantially the same as the thread path indicated by reference symbol C in FIG. 28 in the initial state. From this initial state, similarly to the above-described thread hooking operation to the lower thread tension means 25 of the lower thread dedicated thread EDS,
When the sewing machine is driven in reverse rotation by a control command sent from the control unit 93, the outer hook 7 rotates in reverse and the thread catching hook 46
Of the bobbin 22 and the upper thread locking portion 60 of the thread holding / capturing member 48 whose hook portion 46a is located near the outer periphery of the outer hook 7.
To catch the upper thread US located between
Is rotated in the reverse direction with the hook portion 46a of the upper thread US capturing the upper thread US.
Is guided into the yarn passage entrance 27 formed at the upper end edge of the substrate 26, enters the yarn introduction groove 28, and is further rotated in the reverse direction of the outer hook 7 to form the lower yarn DS that has entered the yarn introduction groove 28. The upper thread US is disposed between the thread engaging hole 29 of the lower thread tension means 25 and the thread outlet 30 in a state where the upper thread US is biased by the biasing force of the lower thread presser leaf spring 31, and as a result, it is necessary for the sewing operation. An appropriate proper lower thread tension can be reliably applied to the upper thread US as the lower thread DS.

The upper thread US serving as the lower thread DS is cut by the cutting edge of the cutting blade 43 provided in the outer hook 7 in the same manner as the lower thread dedicated thread EDS, and the seam is formed as a needle-side thread residue. The length necessary for binding can be sufficiently ensured.

Then, in response to a control command sent from the control unit 93, the reverse rotation of the outer hook is stopped, and the needle bar disconnection mechanism 140 reciprocates the needle bar 2 in the vertical direction separated from the rotation of the upper shaft. By connecting the movement to the rotation of the upper shaft, each part of the lower thread winding device 1 returns to the initial state, and the thread winding operation of the upper thread US as the lower thread DS ends.

As described above, according to the lower thread winding device 1 of the present embodiment, embroidery sewing or the like can be performed on the bobbin 22 without removing the upper thread US in use and without removing the bobbin 22 from the horizontal shuttle 4. Lower thread exclusive thread EDS or lower thread DS to be used
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 selected according to the seam.

Further, the lower thread winding device 1 of the present embodiment
According to this, it is possible to easily perform the thread hooking operation on the lower thread tension means 25 of the lower thread DS supplied to the bobbin 22.
After the end of the bobbin winding operation, the bobbin thread DS wound around the bobbin 22
, An appropriate tension can be easily applied.

According to the bobbin thread winding apparatus 1 of the present embodiment, the bobbin thread DS to be supplied to the bobbin 22 can be wound,
Since the operation of hooking the lower thread DS supplied to the bobbin 22 to the lower thread tension means 25 and the operation of cutting the lower thread DS supplied to the bobbin 22 can be automatically performed, the operability of the sewing machine can be improved. And the labor and time required for the thread winding operation can be reduced.

Further, according to the bobbin thread winding device 1 of the present embodiment, the thread is hooked on the bobbin thread tension means 25 by the operation of rotating the outer shuttle 7 in the reverse direction after the completion of the bobbin winding. , The yarn outlet 30 from the lower thread tension means 25 to the inner hook 1
8, the lower thread path from the bobbin to the cloth after the conventional thread winding passes under the shuttle, so that the cause of the tension instability of the lower thread DS such as an increase in the thread path bending resistance is reliably removed. In addition, an appropriate lower thread tension can be easily applied to the lower thread DS.

Further, according to the bobbin thread winding device 1 of the present embodiment, when the bobbin thread dedicated thread EDS is used as the bobbin thread DS to be supplied to the bobbin 22, the bobbin thread dedicated thread EDS is provided after the bobbin winding operation is completed. Since the yarn end can be easily held by the yarn holding / capturing member 48, the yarn winding operation can be repeatedly and easily performed until the lower yarn thread 111 does not have the lower yarn dedicated yarn EDS. According to the bobbin thread winding device 1 of the embodiment, the winding amount of the bobbin thread DS wound around the bobbin 22 can be selected according to the sewing conditions.

In addition, according to the bobbin thread winding apparatus 1 of the present embodiment, the selection of the lower thread DS and the amount of winding of the lower thread DS are automatically performed according to the pattern sewing data, that is, the sewing pattern at the time of the sewing operation. , The operation related to the thread winding operation can be facilitated.

Further, according to the bobbin thread winding device 1 of the present embodiment, the setting state of the bobbin winding operation can be matched with the state of the bobbin thread winding device 1, so that the bobbin thread dedicated EDS
Is used as the lower thread DS to be supplied to the bobbin 22, it is possible to reliably prevent forgetting to thread the thread EDS dedicated to the lower thread to the thread holding / capturing / combining member 48, and to prevent a malfunction.

Further, according to the bobbin thread winding device 1 of the present embodiment, when the upper thread US is used as the lower thread DS for supplying to the bobbin 22, the thread loosening means 1 during the thread winding operation.
38 releases the holding state of the upper thread US held between each driven roller 128 and the driving roller 124.
Smooth thread winding operation can be easily performed without applying excessive force to S.

Further, according to the bobbin thread winding apparatus 1 of this embodiment, since the warning means 175 is provided, the operator can easily recognize various warnings.

In the lower thread winding device 1 of the present embodiment, the lower thread DS supplied to the bobbin 22 can be selected from the lower thread dedicated thread EDS and the upper thread US. The DS may be configured to use only the lower thread dedicated thread EDS or the upper thread US.

Furthermore, the lower thread winding device 1 of the present embodiment
In the above, the supply side yarn is cut by the cutting blade 43 provided on the outer hook 7 after the end of the winding operation, but the yarn wound on the outer periphery of the outer hook 7 may be captured and cut. .

Furthermore, in the lower thread winding device 1 of the present embodiment, when the upper thread US is used as the lower thread DS for supplying to the bobbin 22, the thread coming out of the bobbin 22 and connected to the cloth after the winding operation is completed. Is cut at the edge of the slit 39 formed in the upper flange 37 of the bobbin 22. The thread is cut by pressing the upper center of the bobbin 22 from above with a pressing member, and pressing the bobbin 22 with the pressing member. The yarn may be cut by repeatedly passing through the gap between the upper flange 37 and the upper flange 37.

In the lower thread winding device 1 of the present embodiment, the driving motor 91 of the yarn holding / combined member moving means 53 is driven to move the yarn holding / combined member 48. The holding / capturing member 48 may be manually moved.

Further, the lower thread winding device 1 of the present embodiment
In the above, the light emitting element 186 and the light receiving element 18 are used as the dedicated lower thread holding detecting means 180 for detecting the holding state of the lower thread DS.
7, the exclusive lower thread holding detector 180 may be configured to detect the tension of the lower thread DS.

In the bobbin thread winding device 1 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 cutting-off mechanism 140 connects the upper shaft and the needle bar 2 to each other. Although the needle bar 2 is configured to be separated, the needle bar 2 may be configured to have an independent drive source for the vertical movement of the needle bar 2 and stop only the needle bar 2.

The bobbin winding amount setting switch 174, the bobbin diameter detecting unit 160, the bobbin winding number measuring unit 206, and the bobbin winding amount control unit 197 of the bobbin bobbin winding device 1 in the bobbin bobbin winding device 1 of this embodiment It is possible to appropriately and easily control the amount of the lower thread DU wound on the lower thread, and shows an example of an embodiment of a lower thread winding amount control device according to the present invention. Therefore, the description of the lower thread winding amount control device according to the present invention will be omitted.

The bobbin thread winding amount control device can be applied not only to the bobbin thread winding device 1 according to the present invention but also to various bobbin thread winding devices.

FIGS. 33 to 43 show an embodiment of the lower thread winding device to which the lower thread winding amount control device according to the present invention is applied. The bobbin thread winding device according to the present embodiment has a configuration in which only the upper thread is used as the lower thread to be supplied to the bobbin, and utilizes the configuration described in Japanese Patent Publication No. 3-27230. Detailed description is omitted, and only the main part will be described. Note that the same reference numerals in the drawings denote components corresponding to those in the above-described embodiment.

FIGS. 33 to 35 show the bobbin rotating mechanism of the lower thread winding device 1A of the present embodiment.
A is provided in the shaft hole of the hollow hook shaft 9A of the outer hook 7A of FIG.
00 is fixed by the thread pull-out member 301. The shaft 3 provided with the cross groove 302 (FIG. 35) on the upper surface
Numeral 03 is frictionally connected to the spring 300, so that the outer hook 7A and the shaft 303 rotate integrally. Further, a shaft 305 having a plate-shaped projection 304 provided downward is urged upward by a spring 306 and incorporated into the axial center portion of the bobbin 22A. As shown in FIGS. 33 and 34, the projection 304 is always located in the bobbin hole 307 (FIG. 35) formed with a large-diameter step at the bottom, and the bottom of the inner hook 18A during the sewing operation. Needle thread US between the outer pot 7A
Is allowed to pass. Further, at the time of the bobbin winding operation, by opening the shuttle cover 308 to the bobbin winding position,
The projection 309 of the shuttle cover 308 pushes down the upper portion 310 of the bobbin shaft, and as a result, the projection 304 of the shaft 305 is pushed down. Since the bobbin 22A is disposed at the center of the outer hook 7A, the pushed-down projection 3
04 is pressed against the cross groove 302 of the shaft 303, and fits into the cross groove 302 when the outer shuttle 7 rotates in the next operation.

FIGS. 40 to 43 show the inner hook 18A which is scooped by the blade point 42 of the lower thread winding device 1A of the present embodiment.
The lower thread tension means 25A during the sewing operation
3 shows a structure in which the lower thread presser leaf spring 31A which is a part of the lower thread presser is not moved into the lower thread presser leaf spring 31A but is moved only during the thread winding operation.

FIG. 42 shows the sewing operation, and
The upper thread US that is scooped by A's sword tip 42 and goes around the inner pot 18A,
The lower thread tension means 25A attached to the inner hook 18A passes through the lower thread tension means 25A without being inserted.

FIG. 41 shows the time of the thread winding operation. The movement of the shuttle cover 308 causes the guiding member 311 constituting a part of the lower thread tension means 25A to rotate as shown in FIG. Arm 31 forming a part of 25A
The upper end US 313 of the inner shuttle 18A is lifted up by the second end 313, so that the upper thread US is moved into the lower thread tension means 25A.

That is, in the bobbin thread winding device 1A of the present embodiment, by rotating the guiding member 311 constituting a part of the bobbin thread tension means 25A, the lower thread presser leaf spring 31A for the upper thread US is rotated. The presence or absence of invitation is controlled.

Then, at the time of the bobbin winding operation, the needle bar 2 is cut off after several needles have been dropped, and the shuttle cover 308 is positioned at the bobbin winding position, whereby the bobbin winding preparation is completed. Then, when the sewing machine is started, as shown in FIGS. 36 to 39, the upper thread US scooped by the sword tip 42 of the outer hook 7A turns vertically above and below the inner hook 18A, and turns around the inner hook 18A. The upper thread US is inserted into the lower thread tension means 25A. And
The upper thread US connected to the needle 3 from the lower thread tension means 25A is pressed against the outer periphery of the upper flange 37 of the bobbin 22A, is bent, and is inserted into the slit 39 from the opening 39a of the rotating bobbin 22A. By continuing the rotation, the upper thread US as the lower thread DS is wound around the bobbin 22A. At this time, the bobbin winding amount setting switch 174, the bobbin diameter detecting means 160, the bobbin winding number measuring means 206, and the bobbin bobbin winding amount control section 197 in the bobbin bobbin winding device 1 of the embodiment described above. By using a control device (not shown), the amount of the upper thread US as the lower thread DU wound on the bobbin 22A can be appropriately and easily controlled.

FIGS. 44 to 48 show another embodiment of the lower thread winding device to which the lower thread winding amount control device according to the present invention is applied. The bobbin thread winding device according to the present embodiment has a configuration in which only the upper thread is used as the lower thread to be supplied to the bobbin, and utilizes a device described in Japanese Patent Publication No. 60-42745. Detailed description is omitted, and only the main part will be described. Note that the same reference numerals in the drawings denote components corresponding to those in the above-described embodiment.

FIGS. 44 and 45 show the bobbin rotating mechanism of the bobbin thread winding device 1B of this embodiment. In the bobbin thread winding device 1B of this embodiment, the shaft 400 shown in FIG. Disk 40 that rotates integrally with outer hook 7B
The rotation of the outer hook 7B is transmitted to the bobbin 22B by engaging the first protrusion 402 with the concave portion 403 formed at the lower end of the bobbin 22B. Then, by switching whether the bent portion 404 serving as the entrance of the bobbin presser leaf spring 31B is covered or released by the control member 405,
It is configured to control whether or not there is an invitation to the lower thread presser leaf spring 31B of the upper thread US. Furthermore, bobbin 22
The operation of the rotation of B and the insertion of the upper thread US into the lower thread tension means 25B is performed in conjunction with the operation of switching the lever 406 from the standby position to the thread winding position shown in FIGS. 44 and 45. .

At the time of the thread winding operation, the upper thread US scooped by the sword tip 42, as shown in FIGS.
After being inserted into the lower thread tension means 25B, the lever 406
Of the bobbin 22B, and the bobbin 22B is rotated by the bobbin 22B by continuing the rotation of the bobbin 22B.
The upper thread US is wound. At this time, the bobbin winding amount setting switch 174, the bobbin diameter detecting means 160, the bobbin winding number measuring means 206, and the bobbin bobbin winding amount control section 197 in the bobbin bobbin winding device 1 of the embodiment described above. By using a control device (not shown), the amount of the upper thread US as the lower thread DU wound on the bobbin 22B can be appropriately and easily controlled.

The present invention is not limited to the above embodiments, but can be modified as needed.

[0188]

As described above, according to the bobbin thread winding device and the bobbin thread winding amount control device of the present invention, the bobbin thread can be supplied to the bobbin with a simple configuration without removing the bobbin from the horizontal shuttle. This is an extremely excellent effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a main part near a horizontal shuttle in an example of an embodiment of a lower thread winding device according to the present invention.

FIG. 2 is a partially cut-away cross-sectional view showing a configuration of a main part near a horizontal shuttle.

FIG. 3 is a perspective view showing a lower thread tension means.

FIG. 4 is a plan view showing the vicinity of the bottom of the inner pot.

FIG. 5 is a longitudinal sectional view showing a bobbin.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a plan view showing a main part of a thread holding / capturing member.

FIG. 8 is a front view of FIG. 7;

FIG. 9 is a perspective view showing a main part of the bobbin driving member moving means.

FIG. 10 is an explanatory diagram showing an example of a dedicated lower thread feeding mechanism and a holding state of a lower thread dedicated thread to a thread holding / capturing member.

FIG. 11 is an explanatory view showing a configuration of a main part of an example of a needle thread feeding mechanism.

FIG. 12 is an exploded perspective view showing a configuration of a main part of an example of a needle bar cutting-off mechanism.

FIG. 13 is a perspective view showing a configuration of a main part of an example of a thread winding diameter detecting unit.

FIG. 14 is a plan view of FIG.

FIG. 15 is an explanatory diagram showing a configuration of a main part of an example of an operation unit.

FIG. 16 is a front view showing a configuration of a main part of an example of a dedicated lower thread holding detection unit.

17 is a side sectional view taken along line YY of FIG. 16;

18 is a side sectional view taken along line ZZ in FIG.

FIG. 19 is a block diagram illustrating an example of a configuration of a control unit.

FIG. 20 is an explanatory view showing a bobbin winding amount of a lower thread.

FIG. 21 is an explanatory view showing the limit number of times of bobbin thread winding.

FIG. 22 is a front view of a main part showing an initial state of the bobbin thread winding device according to the present invention at the time of the thread winding operation.

FIG. 23 is a view showing a state before the start of forward movement following FIG. 22;
Figure similar to 2

FIG. 24 is a view similar to FIG. 22, showing a forward state following FIG. 23;

FIG. 25 is a plan view of FIG. 24;

FIG. 26 shows a state in which the thread can be wound following FIG. 24;
Figure similar to 2

FIG. 27 is a view similar to FIG. 22, showing a state in which the lower thread can be caught, following FIG. 26;

FIG. 28 is a diagram illustrating a thread catching hook and a thread for exclusive use of a lower thread, which are used in a thread threading operation of a thread for exclusive use of a lower thread and a cutting operation of the thread for exclusive use of a lower thread after the thread winding operation of the lower thread thread winding device according to the present invention is completed. Explanatory drawing of the main part showing the positional relationship of

FIG. 29 is a perspective view of a main part showing the progress of the threading operation and the cutting operation.

FIG. 30 is a view similar to FIG. 29, showing an intermediate process following FIG. 29;

FIG. 31 is a view similar to FIG. 29, showing a progression following FIG. 30;

FIG. 32 is an explanatory view showing an upper thread catching state in which the thread holding / capturing member catches the upper thread.

FIG. 33 is a longitudinal sectional view showing a main part of an example of an embodiment of a lower thread winding device to which the lower thread winding amount control device according to the present invention is applied.

FIG. 34 is a bottom view of the bobbin of FIG. 33.

FIG. 35 is an exploded perspective view of a main part of FIG. 33;

FIG. 36 is an explanatory view showing a state at a position where the blade tip scoops and captures the upper thread loop in the thread winding operation of the lower thread winding device of FIG. 33;

FIG. 37 is a view similar to FIG. 36 but showing a state at a position where the upper thread loop following FIG. 36 is caught by the blade and is inserted into the lower thread tension means.

FIG. 38 is a view similar to FIG. 36, but showing a state at a position where the upper thread loop captured by the blade tip is going to come off the blade point, following FIG. 37;

39 is a view similar to FIG. 36, but showing a state at a position where the upper thread loop following FIG. 38 is entering the slit of the bobbin.

40 is a front view of the inner hook of the lower thread winding device shown in FIG. 33;

41 is a perspective view showing a main part of the bobbin thread winding device of FIG.

FIG. 42 is a view similar to FIG. 41, showing a main part of the lower thread winding device of FIG. 33 during the sewing operation of the lower thread tension means.

FIG. 43 is a sectional view taken along the line AA of FIG. 39;

FIG. 44 is a plan view showing a main part of another example of the embodiment of the lower thread winding device to which the lower thread winding amount control device according to the present invention is applied.

FIG. 45 is a longitudinal sectional view of a main part of FIG. 44;

FIG. 46 is a perspective view of a main part showing the progress of the thread winding operation of the lower thread winding device in FIG. 44;

FIG. 47 is a view similar to FIG. 46, showing an intermediate process following FIG. 46;

FIG. 48 is a view similar to FIG. 46, showing a progression following FIG. 47;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lower thread thread winding device 2 needle bar 3 needle 4 horizontal shuttle 7 outer shuttle 11 bobbin drive member 14 bobbin drive gear 18 inner shuttle 25 lower thread tension means 27 thread introduction port 37 upper flange 38 lower flange 39 slit 39a opening 42 blade tip 43 cutting Blade 45 Opening 46 Thread catching hook 47 Thread separating slope 48 Thread holding / capturing member 53 Thread holding / capturing member moving means 58 Thread position regulating unit 59 Upper thread holding unit 60 Upper thread locking unit 70 Rear holding for upper thread Unit 73 Dedicated lower thread rear holding unit 93 Control unit 94 Bobbin driving member moving means 110 Dedicated lower thread feeding mechanism 120 Upper thread feeding mechanism 130 Thread loosening means 140 Needle bar disconnection mechanism 160 Winding diameter detecting means 164 Maximum thread diameter 170 Operation Section 172 Pattern selection switch 173 Winding thread setting switch 174 Thread winding amount setting switch 175 Warning Step 177 Line winding start / stop switch 180 Dedicated lower line holding detection means 193 Line winding operation controller 193A First line winding operation controller 193B Second line winding operation controller 194 Lower line re-holding operation controller 195 Upper line controller 196 Lower line tension Giving operation section 197 Thread winding amount control section 198 Limit thread number setting section 199 Thread winding amount control section 200 Sewing data storage section 201 Automatic setting section 202 Erroneous winding operation prevention section 205 Outer hook reverse rotation mechanism 206 Thread number measuring means US Upper thread DS Lower thread EDS Lower thread exclusive thread

Claims (14)

[Claims] A needle is attached to a tip end of the needle bar. The needle bar reciprocates in the vertical direction in conjunction with the upper shaft during a sewing operation. A needle bar cutting-off mechanism capable of holding the needle upward by stopping the reciprocating movement of the needle in the vertical direction, an upper flange and a lower flange arranged opposite to each other at both ends of the bobbin center axis. A bobbin having a flange, a slit having an opening in an outer peripheral edge is formed in the upper flange, and a lower thread is wound around an outer peripheral surface of a bobbin center axis between the upper flange and the lower flange; And a horizontal hook having an outer hook provided with a sword point for catching a thread, and an inner hook provided with a sword point for catching a thread, and integrally rotating with the outer hook disposed at the axis of the outer hook. A possible bobbin driving member; and The bobbin driving member and the bobbin are separated from each other at a separated position where the bobbin is not rotated and a bobbin driving member is connected to the bobbin at the time of thread winding operation. A bobbin driving member moving means for freely moving back and forth between the bobbin driving member and the vicinity of the thread end of the bobbin thread supplied at the time of the bobbin winding operation, and the longitudinal end portion is always retracted near the outer peripheral surface of the outer hook. The upper end of the bobbin is provided with a thread for exclusive use of a lower thread formed at the tip and supplied at the time of the winding operation. An upper thread holding portion that can be held above the upper thread holding portion, and a lower thread dedicated portion that is disposed at a rear end side of the upper thread holding portion and that is located on the supply side of the upper thread holding portion during the yarn winding operation. A yarn holding member having a yarn position regulating portion for positioning the yarn so as to be able to abut on the upper flange of the bobbin; and an upper yarn holding portion of the yarn holding member at two positions of the retreat position and the entering position. A yarn holding member moving means for moving forward and backward between the upper yarn holding portion and the yarn position regulating portion. And a thread winding operation control unit for operating the needle bar cutting-off mechanism, the horizontal shuttle, the bobbin driving member moving means and the yarn holding member moving means so as to wind the bobbin onto the bobbin. Pincushion device. 2. A reciprocating movement of a needle bar in a vertical direction which is reciprocated in a vertical direction in conjunction with an upper shaft during a sewing operation by attaching a needle to a tip end of the needle bar is cut off from rotation of the upper shaft. A needle bar disconnection mechanism for stopping the reciprocating movement of the needle in the vertical direction and holding the needle upward, and an upper flange and a lower flange disposed opposite to each other at both ends of the bobbin center axis. A slit having an opening at the outer peripheral edge is formed on the upper flange, and a bobbin around which the lower thread is wound around the outer peripheral surface of the bobbin center axis between the upper flange and the lower flange, A horizontal hook provided with an inner pot provided with a bobbin for storing the bobbin, and a sword tip for catching a thread; a bobbin provided at an axis of the outer hook and rotatable with the outer hook. A driving member, and the bobbin driving member, Between a separation position where the driving member and the bobbin are separated to make the bobbin non-rotating, and a coupling position where the bobbin driving member and the bobbin are connected during the thread winding operation and the bobbin is rotated. A bobbin driving member moving means for moving forward and backward freely, and an upper thread supplied as a lower thread during the thread winding operation can be captured, and a longitudinal end portion is always located at a retracted position near an outer peripheral surface of the outer hook; At the time of the bobbin operation, the longitudinal end portion is located at the entry position where it has entered the upper inside of the inner hook, and the upper thread as the lower thread formed at the tip portion and supplied at the time of the bobbin operation is placed above the upper flange of the bobbin. An upper thread locking portion which can be locked so as to be positioned, and a lower thread which is disposed on a rear end side of the upper thread locking portion and which is located on the supply side of the upper thread locking portion during the winding operation. yarn A thread catching member having a thread position regulating portion for positioning the bobbin in contact with an upper flange; and an upper thread locking portion of the thread catching member, the thread catching member being provided at two positions of the retreat position and the entering position. A thread catching member moving means for freely moving between the upper and lower portions of the inner hook by means of a sewing machine being driven to move the needle up and down by the point of the outer hook during the winding operation; The upper thread passing over the inner shuttle is captured by the upper thread locking section and the thread position regulating section of the thread catching member, and then the upper thread is connected between the upper thread locking section and the thread position regulating section. A thread winding operation for operating the needle bar cutting mechanism, the horizontal shuttle, the bobbin driving member moving means, and the thread catching member moving means so that a thread enters the slit and an upper thread is wound on the bobbin as a lower thread. And a control unit. Characteristic bobbin thread winding device. 3. A needle bar is attached to a tip portion of the needle bar. The needle bar reciprocates in the vertical direction in conjunction with the upper shaft during a sewing operation. A needle bar cutting-off mechanism capable of holding the needle upward by stopping the reciprocating movement of the needle in the vertical direction, an upper flange and a lower flange arranged opposite to each other at both ends of the bobbin center axis. A bobbin having a flange, a slit having an opening in an outer peripheral edge is formed in the upper flange, and a lower thread is wound around an outer peripheral surface of a bobbin center axis between the upper flange and the lower flange; And a horizontal hook having an outer hook provided with a sword point for catching a thread, and an inner hook provided with a sword point for catching a thread, and integrally rotating with the outer hook disposed at the axis of the outer hook. A possible bobbin driving member; and The bobbin driving member and the bobbin are separated from each other at a separated position where the bobbin is not rotated and a bobbin driving member is connected to the bobbin at the time of thread winding operation. A bobbin driving member moving means for allowing the bobbin driving member to move back and forth between the bobbin driving member, and one of a lower thread dedicated thread supplied during the thread winding operation and an upper thread supplied as the lower thread can be held or caught, and is always in the longitudinal end. The part is located at a retracted position near the outer peripheral surface of the outer shuttle, and during the winding operation, the longitudinal end is located at an entry position where it has entered the upper inside of the inner shuttle, and is formed at the distal end and supplied during the winding operation. An upper thread retaining section for retaining a lower thread dedicated to the lower thread, an upper thread retaining section for retaining an upper thread supplied as a lower thread, and the upper thread retaining section and the upper thread retaining section. An upper thread provided on the end side and supplied as a lower thread dedicated thread or a lower thread located on the supply side from the upper thread holding section and the upper thread locking section at the time of the thread winding operation can be brought into contact with the upper flange of the bobbin. A thread holding / capturing member including a thread position regulating portion to be positioned; and an upper thread holding portion and an upper thread locking portion of the thread holding / capturing member between the retracted position and the approach position. A yarn holding / capturing member moving means that moves freely so that the upper yarn holding unit and the yarn position regulating unit can be used when a yarn dedicated to a lower yarn is selected as a lower yarn to be wound around the bobbin during a yarn winding operation. The needle bar cutting-off mechanism, the horizontal shuttle, the bobbin driving member moving means, and the thread holding / capturing device so that a thread dedicated to the lower thread is inserted into the slit so that the thread dedicated to the lower thread is wound around the bobbin. Operate member moving means A first thread winding operation control unit for causing the sewing machine to drive the needle up and down to move the needle up and down so that when the upper thread is selected as the lower thread to be wound around the bobbin during the thread winding operation, Then, the upper thread is turned up and down by the blade of the inner hook and the upper thread passing over the inner hook is captured by the upper thread locking portion and the thread position regulating portion of the thread holding / capturing member. The needle bar cutting-off mechanism, the horizontal shuttle, and the bobbin driving member so that an upper thread connected between a stop portion and the thread position regulating portion is inserted into the slit and the upper thread is wound around the bobbin as a lower thread. Moving means and a second means for operating the yarn holding / capturing member moving means;
A bobbin thread winding device, comprising: a thread winding operation control unit. 4. A thread dedicated to a lower thread located near the outer peripheral surface of the outer shuttle when the outer shuttle is rotated forward and protruded from the outer peripheral surface of the outer shuttle is movable in a direction away from the outer shuttle. The yarn holding member or the yarn holding / capturing member is moved from the retracted position after the yarn winding operation when the lower yarn dedicated yarn is selected as the lower yarn to be wound around the bobbin during the yarn winding operation. After being positioned at the upper yarn catching position, the outer hook is rotated to move the lower thread dedicated thread located near the outer peripheral surface of the outer hook in a direction away from the outer hook, and the yarn holding member or A lower thread re-holding operation control section that operates the horizontal shuttle, the thread holding member moving means or the thread holding / capturing member moving means so as to be held by the upper thread holding section of the thread holding / combining member. Claim 1 characterized by the above-mentioned. Lower thread winding device according to claim 3. 5. An upper thread feeding mechanism including a thread loosening means for releasing an upper thread supplied as a lower thread at the start of a thread winding operation, and an upper thread fed from the upper thread feeding device at the start of a thread winding operation. And an upper thread control unit that operates to release the upper thread when the bobbin winds the upper thread as the lower thread. The bobbin thread winding device according to claim 2 or 3, wherein 6. A yarn catching hook formed on an outer peripheral surface of the outer hook, an outer hook reverse rotation mechanism for reversely rotating the outer hook, and the outer hook having the outer hook reverse rotation mechanism fixed to the inner hook. A lower thread tension unit having a thread introduction port into which a lower thread that moves along the upper surface of the inner shuttle when the is rotated in the reverse direction is located near the outer shuttle connected to the bobbin after the bobbin operation is completed. The lower thread is located at the retracted position so as to be located below the upper surface of the outer peripheral surface of the outer shuttle, and the lower thread located near the outer shuttle connected to the bobbin can be captured by the thread capturing hook. Later, the yarn holding member, the yarn catching member, and the yarn holding / capturing device are configured to rotate the outer hook in the reverse direction so that the lower thread located near the outer hook connected to the bobbin enters the yarn inlet. Member, lower thread tension application for operating the outer hook An operating unit, further comprising: an operating unit.
The bobbin thread winding device according to any one of the above items. 7. A cutting blade fixed to an outer peripheral surface of the outer hook in a direction substantially opposite to the sword point in a direction facing the sword tip, and a cutting blade when the outer shuttle rotates reversely on the outer peripheral surface of the outer hook. And an opening formed on the front side in the adjacent rotation direction.The yarn catching hook and the cutting blade are arranged so that the thread catching hook terminates threading of the lower thread on the lower thread tension means. Holds a state in which the cutting blade is separated from a portion of the lower thread from the thread catching hook to the thread holding member or the thread catching member or the thread holding and catching member which is wound around the outer peripheral surface of the outer hook, The outer peripheral surface of the outer hook of the lower thread from the thread catching hook to the thread holding member or the thread catching member or the thread holding catching member after the thread catching hook has finished threading the lower thread on the lower thread tension means. Wrapped around 7. The bobbin thread winding device according to claim 6, wherein a positional relationship is set such that the cutting blade abuts on a portion where the cutting blade comes into contact. 8. A bobbin thread winding amount control device for controlling a bobbin thread winding amount supplied to a bobbin without removing the bobbin from a horizontal shuttle during a bobbin winding operation. A bobbin winding amount setting unit, a bobbin diameter detecting unit that detects a maximum bobbin diameter of a bobbin wound around the bobbin, a bobbin number measuring unit that detects a bobbin rotation speed during a bobbin bobbin winding operation, If the bobbin winding amount is set to the maximum set value by the bobbin winding amount setting unit, the bobbin winding operation is performed until the bobbin diameter detecting unit detects the maximum bobbin diameter of the bobbin wound around the bobbin. If the bobbin winding amount set by the bobbin winding amount setting means is smaller than the maximum set value, the bobbin thread stored and set according to the bobbin winding amount set by the bobbin winding amount setting means. The rotational speed can, lower thread winding amount control apparatus characterized by having a thread winding amount control unit for the thread winding operation until the thread winding number measuring means detects. 9. The bobbin thread winding amount control means for controlling a bobbin winding amount of a bobbin supplied to a bobbin at the time of the bobbin winding operation, according to any one of claims 1 to 7, wherein Bobbin thread winding device. 10. The bobbin thread winding device according to claim 9, wherein said bobbin thread winding amount control means is the bobbin thread winding amount control device according to claim 8. 11. A bobbin winding amount setting means for setting a bobbin winding amount of a bobbin wound on the bobbin; a bobbin diameter detecting means for detecting a maximum bobbin diameter of the bobbin wound on the bobbin; A bobbin winding number measuring means for detecting the bobbin winding number during the bobbin winding operation; and a limit bobbin winding number of the lower bobbin wound around the bobbin, the thick bobbin being larger than the bobbin bobbin rotating speed up to the maximum bobbin diameter. In the case of a fine thread, a limit thread winding number setting unit for setting the thread winding speed of the bobbin to be less than the maximum thread winding diameter, and a case where the thread winding amount of the lower thread is set to the maximum set value by the thread winding amount setting means. The thread winding diameter detecting means may detect the maximum thread winding diameter, or the thread winding number measuring means may output the limit thread winding number set by the limit thread winding number setting section. Is detected until the bobbin winding amount is detected, and when the bobbin winding amount set by the bobbin winding amount setting means is smaller than the maximum set value, the bobbin bobbin winding speed according to the bobbin winding amount set by the bobbin winding amount setting means. And a bobbin winding amount control unit that performs a bobbin winding operation until the bobbin bobbin number measuring unit detects the set bobbin bobbin rotation speed.
The bobbin thread winding device according to any one of the above items. 12. A bobbin thread holding detecting means for detecting whether or not a bobbin thread supplied during a bobbin winding operation is held by the thread holding member or the thread holding / capturing member. The bobbin thread winding device according to any one of claims 1, 3 to 7, and 9 to 11. 13. A sewing data storage unit for storing a plurality of pattern sewing data, a pattern selecting means for selecting desired pattern sewing data from the plurality of pattern sewing data, and a pattern sewing data selected by the pattern selecting means. 10. An automatic setting unit for automatically selecting the lower thread to be supplied to the bobbin and / or automatically setting the bobbin winding amount of the lower thread in accordance with the following. The lower thread winding device according to any one of claims 12 to 12. 14. A thread winding operation of the upper thread when the dedicated lower thread holding detecting means detects the lower thread dedicated thread, and a lower thread when the dedicated lower thread holding detecting means does not detect the lower thread dedicated thread. 14. The lower thread winding device according to claim 13, further comprising an erroneous winding operation preventing unit that invalidates the thread winding operation of the dedicated thread.