JP5273205B2 - Weft storage device in loom - Google Patents

Abstract

The invention provides a weft yarn storing device in a weaving machine, including a plurality of weft yarn feeding devices having weft yarns to be reeled out; a single rotating drum which is provided with a pin which can move in and out of the external surface of the drum; and a plurality of weft yarn guiding rods which moves to enable corresponding yarns to joint with the pin. The weft yarns reeled out from the corrsponding weft yarn feeding devices are circumferentially separated along the external surface of the drum. The weft yarns jointed with the pin are wound and storted on the drum along with the rotation of the drum. The rotating speed of the drum for winding the weft yarns is changed according to the circumferential distance along the external surface of the drum between the weft yarns before the winding on the drum and the weft yarn releasing position where the pin releases the weft yarns, thereby faciliating stoaring the the weft yarns in a contant length.

Description

  The present invention relates to a weft storage device in a loom equipped with a plurality of yarn supplying sections.

  In a weaving loom that inserts wefts in pieces, in order to reduce the weft draw resistance and the variation in draw resistance when wefts are inserted, wefts drawn from the yarn feeding section are stored on the peripheral surface of the drum. A drum-type weft storage method is used for putting. In particular, in a loom for multi-colored fabrics using two or more same or different types of wefts, the same number of weft storage drums as the number of wefts to be used are required. A weft storage drum must be installed. For this reason, there are problems such as an increase in the area occupied by one loom, a complicated configuration of the entire weft storage device, and an increase in cost.

  As a technique for solving the above problems, for example, Patent Document 1 discloses an invention in which wefts are stored using a single rotating drum with respect to a plurality of fixed weft supply units (corresponding to yarn supply units). ing. According to Patent Document 1, the multicolor weft supply device stretches a plurality of wefts in parallel in the vicinity of the outer peripheral surface of a rotating drum that rotates continuously. Prior to the weft insertion operation, the weft to be inserted in the next stage is displaced in the axial direction of the rotary drum by the weft guide lever, and is wound around the rotary drum by being anchored to the weft anchoring pin on the rotary drum. Stored.

  The weft anchoring pin is actuated by a mechanical means such as a cam at a set time, and protrudes or is immersed in the rotating drum. A plurality of weft guide levers are installed corresponding to a plurality of weft yarns, and each is biased by a spring so as to tilt in the axial direction of the rotating drum, but is always tilted by a solenoid provided for each weft guide lever. Is regulated. The solenoid of the weft guide lever corresponding to the weft to be inserted next is operated based on the weft insertion signal from the pattern card that determines the fabric structure or woven pattern, and the restriction of the weft guide lever is released. The regulated weft guide lever is tilted by a spring and guides the next weft insertion target weft to a position to be anchored with the weft anchoring pin on the rotary drum. Accordingly, the weft is wound around the rotating drum and stored.

JP-A 48-42164

  In Patent Document 1, the respective wefts stretched around a weft insertion mechanism from a plurality of fixed weft supply parts are arranged at intervals so as not to interfere with the periphery of a single rotating drum. Therefore, the position of each weft guided to the peripheral surface of the rotary drum by the weft guide lever has a different distance from the protruding position of the weft anchoring pin. On the other hand, prior to weft insertion, the weft mooring pin is set to have a fixed time when it protrudes from the rotary drum to store the weft and when it enters the rotary drum for weft insertion and releases the weft.

  Note that the weft release time (the weft mooring pin immersion time) is an absolute timing for performing weft insertion and cannot be changed. Further, the protruding timing of the weft tether pin cannot be changed because it is actuated by mechanical means such as a cam. In such a configuration, when the weft yarn having a length necessary for one weft insertion, that is, one pick length is stored in the rotary drum, the guide position of each weft from the protruding position or the immersion position of the weft anchoring pin. Since the distance to each other is different, there is a problem that the storage amount of each weft yarn varies. For example, if one weft is set so that the length of one pick can be stored, the other weft stores a weft longer than one pick or a weft shorter than one pick. For this reason, there is a possibility that other wefts may be poorly inserted in any case.

  The present invention provides a weft storage device capable of making the storage amounts of a plurality of wefts stored in a single rotating drum the same.

  According to a first aspect of the present invention, a single rotating drum is disposed downstream of a plurality of yarn supplying units, and a plurality of the weft locking pins that can be advanced and retracted on an outer peripheral surface of the rotating drum are disposed on the rotating drum. A plurality of weft guide levers for guiding the wefts of the yarn feeding part to the weft locking pins in correspondence with the yarn feeding part of the yarn feeding part, and the wefts of the selected yarn feeding part by the weft guide lever In the weft accumulating device in the loom that is retained by the retaining pin and wound around the rotating drum, each weft drawn from the plurality of yarn supplying portions is moved from the weft releasing position of the weft retaining pin. The number of rotations of the rotating drum when winding the weft is varied so that the storage amount is the same for each weft according to the difference in the distance on the outer peripheral surface of the rotating drum.

  According to claim 1, when wefts are wound, the amount of storage of all the wefts can be made the same by changing the number of rotations of the rotating drum according to the position where the selected wefts are guided, It is possible to prevent a weft insertion failure that occurs due to variations in the weft storage amount.

  According to a second aspect of the present invention, the rotational speed of the rotary drum is a rotation at the time of winding a weft arranged at another position on the basis of the rotational speed at the time of winding the weft arranged farthest from the weft releasing position. The number is set. According to the second aspect, since the rotational speed of the rotating drum when winding the weft arranged farthest from the weft releasing position is used as a reference, the rotational speed of the rotating drum necessary for winding the other weft is arranged. It is only necessary to sequentially change the distance corresponding to the distance between the wefts, and the number of rotations of the rotary drum can be easily set.

  According to a third aspect of the present invention, the number of rotations of the rotary drum at the time of winding a weft arranged farthest from the weft release position is set to the number of rotations, and the time at the time of winding a weft arranged at another position is set. The number of rotations at the initial winding stage of the rotating drum is set lower than the number of rotations, and the number of rotations after the initial winding stage is set higher than the number of rotations. According to the third aspect, in the change of the rotational speed of the rotating drum at the time of winding the weft arranged at another position, the rotational speed in the latter half of winding is set higher than the initial rotational speed of the rotating drum. Accordingly, there is an advantage that not only the lengths of the stored wefts are made uniform, but also the synchronization with the rotation of the loom is easy to take.

  According to a fourth aspect of the present invention, the movement or standby of the weft guide lever is controlled by a solenoid, and the guide of the weft with respect to the weft locking pin is controlled by a cam mechanism. According to the fourth aspect, since the selection and operation of the weft guide lever are performed by a combination of electrical control and mechanical control, the weft can be reliably locked to the weft locking pin. In addition, variations in the solenoid operation timing based on the weft insertion signal of the weft insertion pattern created from the woven fabric or woven pattern can be absorbed by the cam mechanism, and the solenoid operation timing can be easily set.

  According to the present invention, in the weft storage device of a weaving machine that stores a weft by using a single rotating drum for a plurality of yarn supplying units, the storage amount of each weft can be made the same.

It is a top view which shows the weft storage apparatus of an air jet loom. It is a front view which shows the rolling state of the cam mechanism and cam follower of a weft storage device. FIG. 3 is a cross-sectional view of the cam mechanism shown in FIG. 2. It is a side view which shows the positional relationship of the weft with respect to a rotating drum. 6 is a timing chart for explaining the relationship between weft winding and weft insertion and the rotational speed of a rotating drum.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows weft storage in an air jet loom for a multicolor fabric having two weft insertion nozzles 1 and 2 and two yarn feeding sections 3 and 4 that perform weft insertion by jetting air flow as a weft insertion mechanism. The device is shown. The weft insertion nozzle 1 and the weft insertion nozzle 2 perform a weft insertion operation in response to a command signal from the control unit 36 having a weft insertion pattern program created based on the fabric structure or woven pattern. On the upstream side of the weft insertion nozzle 1, there are provided a weft grip portion 5 that is operated by a mechanical drive source such as a cam and weft guides 6 and 7 that are arranged with the weft grip portion 5 interposed therebetween. Similarly, on the upstream side of the weft insertion nozzle 2, there are provided the weft grip portion 8 and the weft guides 9 and 10 arranged with the weft grip portion 8 interposed therebetween. The weft gripping portions 5 and 8 open and grip the wefts Y1 and Y2 at the start of weft insertion and at the end of weft insertion. Tensors 11 and 12 are provided in the vicinity of the yarn feeding sections 3 and 4 and support the weft guides by leaf springs. The wefts Y1 and Y2 drawn from the yarn feeding sections 3 and 4 are respectively fed from the tencers 11 and 12 to the weft guide 6. , 7, 9, and 10 to reach the weft insertion nozzles 1 and 2.

  Between the yarn feeding sections 3 and 4 and the weft gripping sections 5 and 8 downstream of the yarn feeding sections 3 and 4, a single rotating drum 13 and a cam mechanism 14 that can rotate integrally with the rotating drum 13, Two weft guide levers 15 and 16 corresponding to the yarn feeding sections 3 and 4 are arranged. The rotating drum 13 is formed of a truncated cone-shaped cylinder, and is rotated in the direction of the arrow in FIG. 1 via the driven gear 17 and the cylindrical rotating shaft 18 connected to the transmission mechanism 39 of the electric motor 38. Inside the rotary drum 13 and the rotary shaft 18, there is provided a drive rod 19 fitted so as to be able to reciprocate in the axial center X direction of the rotary drum 13.

  An L-shaped link 20 is rotatably attached to the inner wall portion of the rotating drum 13. One end of the L-shaped link 20 is connected to the end of the drive rod 19, and the other end of the L-shaped link 20 constitutes a weft locking pin 21. The weft locking pin 21 is disposed corresponding to a hole 37 (see FIG. 4) formed in the rotary drum 13, and advances and retreats between the inside of the rotary drum 13 and the outer peripheral surface 13 </ b> A of the rotary drum 13 through the hole 37. Is possible. The weft locking pin 21 advances on the outer peripheral surface 13A of the rotary drum 13 with the forward movement of the drive rod 19 in the axial center X direction, and rotates with the backward movement of the drive rod 19 in the axial center X direction. Retreat into the drum 13. Accordingly, the drive rod 19, the L-shaped link 20, and the weft locking pin 21 rotate together with the rotary drum 13 while the weft locking pin 21 moves forward and backward.

  As shown in FIGS. 2 and 3, the cam mechanism 14 includes a disc cam 22, and a shaft hole 23 into which the rotary shaft 18 is fitted is formed at the center. The disc cam 22 is formed as a crest 24 having a constant radius on almost half of the cam surface formed on the peripheral surface, and a trough 25 in which the other half is gradually smaller in diameter than the crest 24. . A groove cam portion 27 covered with a roof 26 concentrically formed with the cam surface is provided at the position of the valley 25 having the smallest diameter. An introductory opening cam portion 28 in which the outer circumferential surface of the disc cam 22 is opened is provided in the trough portion 25 on the rotation direction (arrow direction in FIG. 2) side of the disc cam 22 relative to the groove cam portion 27. The trough portion 25 on the near side in the rotational direction is provided with a lead-out opening cam portion 29 in which the outer circumferential surface of the disc cam 22 is opened.

  Since the weft guide levers 15 and 16 have the same structure except for the phase, only the weft guide lever 15 will be described. The reference numerals used in the description of the weft guide lever 15 are used for the description of the weft guide lever 16. The weft guide lever 15 has a main body in which a vertical lever 30 and a horizontal lever 31 are integrated in an L shape, and is provided so as to be movable toward and away from the axis X of the rotary drum 13. . The vertical lever 30 extends toward the cam mechanism 14, and the horizontal lever 31 extends so as to be parallel to the axis X outside the outer peripheral surface 13 </ b> A of the rotary drum 13. The weft guide lever 15 is urged in a direction approaching the axis X by a spring 35 as a spring mechanism.

  The vertical lever 30 includes a cam follower 32 that contacts a cam surface formed on the disc cam 22 of the cam mechanism 14 at the lower end, and the horizontal lever 31 includes a thread presser 33 that faces the outer peripheral surface 13A of the rotary drum 13. . In the position where the weft guide lever 15 is farthest from the axis X of the rotary drum 13, the thread presser 33 is not in contact with the weft Y1 indicated by the phantom line in FIG. 1 (the weft guide lever 16 in FIG. 1). (See the positional relationship between the thread presser 33 and the weft Y2). Accordingly, the weft Y1 is stopped from being wound around the rotary drum 13.

  A solenoid 34 configured as an actuator is disposed on the side of the vertical lever 30, and the solenoid 34 performs a projecting operation or a retracting operation according to a command signal based on a weft insertion pattern from the control unit 36. The protruding operation of the solenoid 34 is engaged with a part of the vertical lever 30 to restrict the movement of the weft guide lever 15, so that the weft guide lever 15 is held at the position farthest from the axis X of the rotary drum 13. Therefore, the solenoid 34 can selectively control the restriction and movement of the weft guide lever 15 based on a command from the control unit 36. 1 denotes a warp, W denotes a woven fabric, and K denotes a weft cutting device.

  In FIG. 4, the positional relationship between the weft Y1 and the weft Y2 with respect to the rotary drum 13 will be described. On the outer periphery of the rotary drum 13, the weft Y1 is stretched from the tensor 11 to the weft guide 7, and the weft Y2 is arranged at an interval so as not to interfere with the weft Y1. In the example of FIG. 4, the weft Y2 is stretched from the tensor 12 to the weft guide 10 so as to be the target position with an interval of approximately 180 degrees from the weft Y1. A distance of a length L on the outer peripheral surface 13A of the rotary drum 13 is generated between the weft Y1 and the weft Y2. When three or more yarn feeding units are installed, the outer periphery of the rotary drum 13 is usually arranged in an equally divided form. For example, when four yarn supplying units are installed, the four wefts are arranged with an interval of 90 degrees. Therefore, a difference in distance on the outer peripheral surface 13A corresponding to the interval between the wefts is always generated.

  On the other hand, the advancement timing of the weft locking pin 21 for locking the weft Y1 or the weft Y2 is defined by a cam or the like for driving the drive rod 19, and the weft locking pin 21 is indicated by a solid line in FIG. In addition, as viewed in the rotation direction of the rotary drum 13, it advances at a position that is in front of the positions of the weft Y1 and the weft Y2. Further, the retreat timing of the weft locking pin 21 for releasing the weft Y1 or the weft Y2 is the weft insertion start time set in the weft insertion pattern, and is the position indicated by the phantom line in FIG. For this reason, when the rotary drum 13 is driven, the rotary drum 13 is wound around the outer peripheral surface 13A until it is locked by the weft locking pin 21 and then released (position of the weft locking pin 21 indicated by the phantom line). The length of the weft Y1 and the weft Y2 has a difference in distance of the length L.

  In the embodiment of the present invention, when the weft Y1 or the weft Y2 is selected, the control unit 36 controls the rotational speed of the electric motor 38 that drives the rotary drum 13. In the present embodiment, the reference for control is set to the release position of the weft Y1 or the weft Y2 (the position of the weft locking pin 21 indicated by the phantom line). The reason for selecting the weft release position as the control reference is that the weft release time, which is the same as the weft insertion time, is a condition that cannot be changed in the weaving, but in order to lock the weft Y1 or the weft Y2, the weft locking pin 21 This is because the timing at which the projection protrudes can be freely changed at a timing that can be locked by using an electric actuator instead of a cam as the driving means.

  In the example of FIG. 4, when the other weft Y2 is wound on the control unit 36 with respect to the rotational speed at which the weft Y1 that is disposed farthest away from the weft release position in the direction opposite to the rotation direction of the rotary drum 13 is wound, The rotational speed of the rotary drum 13 is set to be different. That is, the initial rotational speed from the time when the weft Y2 is locked by the weft locking pin 21 to the time when the weft Y2 is released by the weft locking pin 21, which is the weft insertion time of the weft Y2, is lower than the speed of the weft Y1. Set to number of revolutions. Further, the number of rotations from the release of the weft Y2 to the end of winding is set higher than that of the weft Y1.

  Accordingly, the weft Y1 has a length of one pick stored by the rotary drum 13, and the weft Y2 compensates for the distance of the length L by the second high rotation speed in addition to the initial low rotation speed, and is equivalent to one pick. The length will be stored. For this reason, in a configuration in which a plurality of wefts Y1 and wefts Y2 are arranged in different phases with respect to a single rotating drum 13, it is possible to obtain both winding and storage amounts corresponding to one pick. . When the weft Y2 is wound, the setting in which the rotational speed of the rotary drum 13 is varied from low speed to high speed has an advantage that it is easy to synchronize with the rotation of the loom.

  The operation of the embodiment of the present invention will be described with reference to FIGS. 1, 2, 4 and 5. FIG. As for the weft insertion order, as shown in FIG. 5, weft Y1 is first inserted and then weft Y2 is inserted. During the operation of the loom, prior to the start of weft insertion of the weft Y1, the drive rod 19 moves forward to the right in FIG. 1, and the weft locking pin 21 advances onto the outer peripheral surface 13A of the rotary drum 13 (solid line in FIG. 4). reference). At the same time, a winding command signal for the weft Y1 is transmitted from the control unit 36, so that the solenoid 34 moves backward to release the engagement with the vertical lever 30 and restrict the vertical lever 30, that is, the weft guide lever 15 To remove the restrictions.

  The weft guide lever 15 moves toward the axis X of the rotary drum 13 by the urging force of the spring 35. In this movement process, the thread presser 33 engages with the weft Y1 at the position of the imaginary line in FIG. 1 and moves the weft Y1 to the outer peripheral surface 13A side of the rotary drum 13. Further, since the cam follower 32 is pressed against the introduction opening cam portion 28 indicated by 32A in FIG. 2, the weft guide lever 15 moves according to the cam surface of the introduction opening cam portion 28. The introduction opening cam portion 28 has a wide operating range of the cam surface. Therefore, no problem occurs even if the contact timing between the cam follower 32 and the cam surface of the introduction opening cam portion 28 is shifted. Therefore, the solenoid 34 can freely set the restriction release timing of the weft guide lever 15 and can absorb the variation in the restriction release timing generated in the solenoid 34 by the introduction opening cam portion 28.

  When the cam follower 32 is introduced into the groove cam portion 27 (see 32B in FIG. 2), the weft guide lever 15 moves to a position (see FIG. 1) indicated by a solid line where the weft Y1 can be engaged with the weft locking pin 21. To do. The moving position of the weft guide lever 15 is defined by the groove cam portion 27 and is kept stable without being affected by the vibration of the loom or the like (see 32C in FIG. 2). For this reason, the weft Y1 is reliably locked by the weft locking pin 21, and winding around the outer peripheral surface 13A is started at a constant rotational speed of the rotary drum 13.

  When winding of the weft Y <b> 1 is started, the cam follower 32 reaches the position 32 </ b> D in FIG. 2 in the groove cam portion 27 and is led out to the lead-out opening cam portion 29. Accordingly, the weft guide lever 15 is moved in the direction away from the axis X of the rotary drum 13 by the cam surface of the lead-out opening cam portion 29 (see 32E in FIG. 2).

  Since the cam follower 32 further reaches the peak portion 24 from the lead-out opening cam portion 29 (see 32F in FIG. 2), the weft guide lever 15 is located farthest from the axis X of the rotary drum 13 by the cam surface of the peak portion 24. Maintained. In this state, a projection operation command signal is transmitted from the control unit 36 to the solenoid 34. The solenoid 34 engages with the vertical lever 30 by operating to protrude, and restricts the movement of the vertical lever 30, so that the weft guide lever 15 is held at the position in the standby state farthest from the axis X, and the next winding Prepare for storage.

  On the other hand, when winding and storage of the weft Y1 proceed and the weft Y1 is stored for a predetermined length less than the length required for one weft insertion, the weft Y1 is continuously wound and controlled. A weft insertion signal is transmitted from the unit 36. The weft locking pin 21 is retracted into the rotary drum 13 by a drive mechanism (not shown) (see the phantom line in FIG. 4), and the weft gripping portion 5 releases the weft Y1, and the weft insertion nozzle 1 starts weft insertion. . Accordingly, the weft Y1 wound around the rotary drum 13 is sequentially drawn out by the weft insertion nozzle 1 and inserted into the opening of the warp T.

  Even after the weft locking pin 21 is retracted into the rotary drum 13, the weft Y1 remaining on the rotary drum 13 has a winding resistance with respect to the outer peripheral surface 13A of the rotary drum 13. In parallel with the release of the weft Y1 by the insertion nozzle 1, the weft Y1 is continuously withdrawn from the yarn supplying section 3 and wound around the rotary drum 13. The winding length of the weft Y1 wound around the rotating drum 13 before the weft locking pin 21 moves back into the rotating drum 13, and the weft Y1 wound around the rotating drum 13 after the weft locking pin 21 moves back into the rotating drum 13. The timing at which the weft locking pin 21 is retracted into the rotary drum 13 is set so that the total length of the two is equal to the length of one pick (one weft insertion). When the weft Y1 for one pick is inserted by the weft insertion nozzle 1, the weft gripping portion 5 is operated to grip the weft Y1, and thus the weft insertion of the weft Y1 is completed.

  Subsequently, based on the weft insertion pattern, weft insertion of the weft Y2 is performed as shown in FIG. Winding and storage of the weft Y2 around the rotary drum 13 by the weft guide lever 16 is performed before the weft insertion of the weft Y2 by the weft insertion nozzle 2 as shown in FIG. That is, the weft Y2 is guided to the outer peripheral surface 13A side of the rotary drum 13 by the weft guide lever 16 being released from the restriction by the solenoid 34 and is locked to the weft locking pin 21. The cam follower 32 of the weft guide lever 16 is controlled by the cooperative action of the urging force of the spring 35 and the cam mechanism 14, whereby the thread presser 33 stabilizes the guide position of the weft Y2 and the weft threaded by the weft locking pin 21. Y2 can be reliably locked. Since the operation up to the start of winding of the weft Y2 by the weft guide lever 16 is the same as that of the weft Y1 by the weft guide lever 15, detailed description will be omitted and only different configurations will be described.

  When weft insertion of the weft Y2 is selected, the control unit 36 transmits a command signal for reverse operation to the solenoid 34 and transmits a low-speed rotation command signal shown in FIG. 5 to the electric motor 38 of the rotary drum 13. Accordingly, the rotary drum 13 rotates at a lower speed than that of the weft Y1, starts winding the weft Y2, and stores it. At the timing when the weft locking pin 21 moves back into the rotary drum 13 and releases the weft Y2, the control unit 36 sends a weft insertion start signal to the weft insertion nozzle 2 and rotates the electric motor 38 at high speed as shown in FIG. Send command signal. Therefore, the rotary drum 13 rotates at a higher speed than that of the weft Y1, and the length that compensates for the difference in the length L shown in FIG. 4 until the end of winding of the weft Y2 shown in FIG. A weft Y2 having a length of minutes is wound and stored. For this reason, the weft storage device does not vary in the storage amount regardless of which of the weft Y1 and the weft Y2 is selected, and enables stable weft insertion.

  The present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.

(1) As shown in FIG. 5, the rotational speed of the rotary drum 13 in winding the weft Y2 is not limited to the setting for changing the initial rotational speed and the subsequent rotational speed, but the distance of the length L shown in FIG. If the rotational speed can be changed to eliminate the difference, the rotational speed may be set to a constant rotational speed. In this case, as a method of synchronizing with the rotation of the loom, for example, the number of synchronization pulses of the electric motor 38 may be changed only when the number of rotations is changed.
(2) The weft locking pin 21 is not limited to a mechanically driven configuration, and can be configured as an actuator driven electrically by a solenoid or hydraulically or pneumatically like a cylinder.
(3) The weft locking pin 21 is not limited to a mechanism that advances and retracts from the inside of the rotating drum 13 to the outside, and can be implemented even in a configuration that advances and retracts from the outside to the inside of the rotating drum 13.

(4) The cam mechanism 14 may be constituted by an open disc cam that does not have the groove cam portion 27 shown in the above embodiment, or may be constituted by a flat cam or a three-dimensional cam other than the disc cam. it can.
(5) The weft guide levers 15 and 16 can replace the spring 35 with a moving mechanism having a positive drive unit. Further, the form of the weft guide levers 15 and 16 is not limited to the above embodiment as long as it includes the cam follower 32 and the thread presser 33, and various other shapes can be selected.
(6) The restriction and release of the weft guide levers 15 and 16 are not limited to the electrically actuated solenoid 34, but can be implemented by a mechanical drive mechanism as long as it has a selection function.

(7) In the above embodiment, a loom that wefts two types of wefts Y1 and Y2 is shown. However, the present invention can be carried out in a loom that uses three or more types of the same or different types of wefts.
(8) The present invention is not limited to an air jet loom but can be implemented in a loom that wefts a piece of weft, such as a water jet loom, a rapier loom, and a gripper loom.

・ Weft insertion nozzle ・ Yarn feeding part ・ Weft gripping part 13 Rotating drum 13A Outer peripheral surface 14 Cam mechanism 15, 16 Weft guide lever 18 Rotating shaft 19 Drive rod 21 Weft locking pin 22 Disc cam 24 Mountain part 25 Valley part 26 Roof 27 Groove cam portion 28 Introducing opening cam portion 29 Deriving opening cam portion 30 Vertical lever 31 Horizontal lever 32 Cam follower 33 Thread presser 34 Solenoid 35 Spring 36 Control portion 37 Hole 38 Electric motor 39 Transmission mechanism

Claims (4)

A single rotating drum is disposed downstream of the plurality of yarn supplying sections, and a weft locking pin that can be advanced and retracted on an outer peripheral surface of the rotating drum is disposed on the rotating drum, and at the plurality of yarn supplying sections. Correspondingly, a plurality of weft guide levers for guiding the wefts of the yarn supplying section to the weft locking pins are provided, and the selected wefts of the yarn supplying section are engaged with the weft locking pins by the weft guide lever. In the weft storage device in the loom to stop and wind around the rotary drum,
Each weft drawn from the plurality of yarn feeding portions has the same storage amount for each weft according to the difference in the distance on the outer peripheral surface of the rotary drum from the weft release position of the weft locking pin. Thus, the weft storage device in the loom characterized in that the number of rotations of the rotary drum at the time of winding the weft is varied.   The rotational speed of the rotary drum is set to the rotational speed at the time of winding the weft arranged at another position with reference to the rotational speed at the time of winding the weft arranged farthest from the weft release position. The weft accumulating device in the loom according to claim 1.   Compared to the rotational speed of the rotating drum when winding the weft arranged farthest from the weft releasing position, the initial rotational speed of the rotating drum when winding the weft arranged at another position is The weft storage device in a loom according to claim 2, wherein the rotational speed is set lower than the rotational speed and the rotational speed after the initial winding is set higher than the rotational speed.   The movement or waiting of the weft guide lever is controlled by a solenoid, and the guide of the weft with respect to the weft locking pin is controlled by a cam mechanism. Weft storage device for looms.

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