JPS6297946A - Weft yarn treatment apparatus in shuttleless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a weft processing device in a shuttleless loom such as a jet loom, a rapier loom, or a gripper loom.

(Prior technology) Shuttleless t@ machines such as jet looms can be expected to be more productive than diameter looms, and in recent years there has been a trend in the adoption of shuttleless looms. It is a well-known fact that the incidence of insertion errors is higher than in diameter looms. In the event of a weft insertion error, the machine is stopped based on the weft insertion error detection signal from the weft detector, but in high-speed looms such as shuttleless looms, the machine is stopped in order to prevent damage to various parts. Since the machine is stopped after inertia has exceeded the rotation,
The weft threads that were misplaced (hereinafter referred to as "mistake threads") are beaten with a reed just before the machine stops and become visible in the woven fabric. Therefore, it is necessary to reverse the machine to release the warp from holding the misplaced thread and remove the misplaced thread, but conventionally, this misplaced thread removal work has been done manually. However, since the misplaced yarns are inserted into the fabric in substantially the same way as normal weft yarns, even when the warp threads are set to the maximum open state, the grasping of the misplaced threads by the warp threads is not sufficiently released. Therefore, it is not easy to remove misplaced yarns (and the removal work is very complicated), which increases the downtime of the machine and impedes the improvement in productivity required for high-speed looms.

An example of an attempt to solve this problem is the Japanese Patent Application Laid-Open No. 1986-
It is disclosed in Japanese Patent No. 220856.

In this conventional device, a weft processing device equipped with one finger for separating the mis-woven yarns woven into the woven fabric moves from a retracted position on a guide rail installed in the Wi width direction to remove a predetermined mis-yarn from the woven fabric. The finger is moved to the processing position, slides on the woven fabric, and enters the warp opening while rubbing the front of the fabric from outside the warp opening, thereby separating the missed yarns from the woven fabric into the warp opening. ing. The mis-threads separated in this way are passed from the finger to the mis-thread pulling means inserted by scraping the warp threads from outside the warp opening, and the mis-threads are removed together with the mis-thread pulling means that is moved from inside the warp opening to outside the warp opening. A portion of the yarn is pulled out from within the warp shedding to outside the warp shedding. A part of the missed yarns pulled out of the warp shedding is pressed and held between a pair of pull-out rollers, and by driving both pull-out rollers, all of the miss yarns are pulled out from inside the warp sheath. The erroneous yarn pulled out in this way is removed by suction by a suction pipe.

(Problems to be Solved by the Invention) The first requirement in the conventional device as described above is for the fingers to catch the misplaced threads driven into the woven fabric and reliably separate the misplaced threads from the woven fabric. That's true. It goes without saying that separating a single misplaced thread from the woven fabric requires extremely delicate movements of the fingers, but it is necessary to slide on the fabric and rub the woven fabric from outside the warp opening to remove it from inside the warp opening. In the means of entering the tip of a finger into the tip of the finger, hooking the missed thread on the tip of the finger, and separating it from the front of the weave into the warp opening, the movement conditions such as the moving speed, direction of movement, and smoothness of movement of the finger affect the separating effect of the missed thread. It has an extremely large impact. The approximately elliptical orbit of the finger is obtained by a configuration in which the intermediate part of the finger, which is rotatably connected to the tip of a swingable arm centered on a single point, moves circularly in one direction. The positional relationship of each member to be moved is complex, and it is extremely difficult to set the timing for imparting a predetermined movement state to the fingers. Therefore, even though the tips of the fingers engage with the misplaced threads driven into the fabric, there is a high possibility that they will fail to catch the misplaced threads.

Structure of the Invention (Means for Solving Problems) Therefore, in the present invention, the warp threads are formed in an open state and the weft threads woven into the woven fabric are released from the weaving state immediately before the machine stops, and then the warp threads are woven from outside the warp open state. In a weft processing device equipped with a weft separation member that rotates into the warp shedding while rubbing the fabric front, a balance means is provided to keep the rotational moment of the weft separation member substantially constant at least within a rotational range of the weft separation member. Established.

(Function) In other words, the rotational moment of the weft separation member, which rotates into the warp shedding while rubbing the fabric front from outside the warp shedding, is approximately constant at any rotational position within the rotation range of the separation member. Therefore, the rotational driving force for rotating the weft separation member only needs to be approximately constant, and the rotation of the weft separation member rotated by such rotational driving force is performed smoothly. Therefore, it becomes easy to set the extremely delicate movement of the weft separation member required to separate a single weft thread from the fabric lining, and the weft separation from the woven fabric is successful with a high percentage.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 11.

As shown in FIG. 2, ■ is a weft insertion main nozzle attached to one end of the slay (not shown), and the weft is guided into the main nozzle 1 via a weft length measuring and storage device (not shown). is ejected from a weft insertion main nozzle 1 into a weft guide path S formed by a large number of weft guide members 2 arranged in parallel on the sleigh. In this embodiment, a so-called drum-type weft length measuring and storing device is used as the weft length measuring and storing device, in which the weft is wound around a drum and stored in a measured area. The weft inserted into the weft guide path S is transferred to the weft insertion main nozzle 1 by auxiliary nozzles (not shown) disposed at predetermined intervals in the weft insertion direction, facing the weft guide member 2.
It is towed sequentially from the side in a relay manner.

When the weft ejected from the weft insertion main nozzle 1 is inserted normally and reaches the end of the woven fabric W on the side opposite to the main nozzle, the weft yarn is inserted into the weft yarn guide member 2 during the beating operation, that is, along with the weft insertion. While the weft moves forward toward the woven fabric W side, the weft escapes from the guide hole 2a of the weft guide member 2 through the slit 2b, and the weft is moved by the reed 3 to the front W of the woven fabric W.
1 and woven into the woven fabric W, the cutter 4 is provided near the edge of the woven fabric W on the weft inserting main nozzle l side.
disconnected by. Thereafter, weft insertion is continued.

If a weft insertion error occurs such as the weft not reaching the fabric edge on the side opposite to the main nozzle, the weft detector (path shown) provided on the weft guide member 2 located near the fabric edge detects the weft insertion error. is detected, and the machine is stopped based on a weft insertion error detection signal from the detector.

The weft detector is composed of light emitting/receiving elements arranged opposite to each other across the slit 7l-2b of the weft guide member 2, and emits a weft insertion error detection signal when the weft does not pass through the slit 2b during beating. be.

After the weft insertion error detection signal (also a machine stop signal) is issued, the machine rotates almost once due to inertia and stops just before beating, and during this machine inertia operation, the machine machine rotates almost once due to inertia and stops when the machine inertia is operating. is woven fabric W
It is woven into Further, during machine inertia operation, weft insertion following the erroneous yarn Y is attempted, but weft withdrawal from the weft length measuring and storage device is prevented based on the erroneous weft insertion detection signal.

That is, a weft locking pin that protrudes and retracts from the drum is maintained in a protruding state based on the weft insertion error detection signal in order to control the length measurement storage of the weft on the drum and the transition to the weft insertion direction, and This prevents the thread from being pulled out and unwound.

Support brackets 5 and 6 are erected on both the left and right side frames (road shown), and both brackets 5 and 6
A support rail 7 having a U-shaped cross section is installed between them. Suspension brackets 8 are fixed to the front surfaces of both ends of the support rail 7, and a drive shaft 9 is rotatably suspended from the lower end of the suspension brackets 8.

One support bracket 5 has a drive motor 1 that can be rotated in forward and reverse directions.
0 is attached to the motor 10, and a driven gear 11 fixed to the drive shaft 9 is meshed with the drive gear 10a of the motor 10. The drive motor 10 is operated based on the weft insertion error detection signal, and is rotated in the forward direction by a predetermined amount and then rotated in the reverse direction by the same amount.

A weft pull-out device 12 is disposed at the end of one main weft insertion nozzle of the support rail 7, and a plurality of weft separation devices 13 are disposed at predetermined intervals in the remaining part of the support rail 7. has been done. The weft pulling device 12 and the weft separating device 13 constitute the entire weft processing device.

The weft pulling device 12 will be described in detail. As shown in FIG. 1.3, its frame 12a is fastened to the support rail 7 so that the drive shaft 9 can rotate through both side walls. A bifurcated hanging bracket 14 is fastened and fixed to the front surface of the support rail 7 on the left side wall side (the left side in FIG. 1) of the support rail 12a. Same bracket 14
A shaft 15 is rotatably supported between the forked ends of the shaft 15, and in FIG.
A gear 16 is fixed to the left end of the drive shaft 5 and meshes with a gear 17 fixed to the drive shaft 9. The number of teeth of the gear 16 and the gear 17 is set to be the same, so that the gear 16 rotates once for every rotation of the gear 17. A bifurcated arm 18 is rotatably supported on a shaft 15 between the support pieces 14a and 14b of the hanging bracket 14, and a timing pulley 1 is mounted on the shaft 15 within the arm 18.
9 is fixed, and the arm piece 18 of the bifurcated arm 18
A shaft 20 is rotatably supported between the tip portions a and 18b. A balance weight 21 is fixed to the connecting base end of the bifurcated arm I8.
is a pair of stoppers 7 fixed to the hanging bracket 7
2.73, the rotation range of the bifurcated arm 18 is restricted. A timing pulley 22 is fixed to the shaft 15 between the arm pieces 18a and 18b, and a timing belt 23 is hung between the pulley 22 and the timing pulley 19.

A clutch stand 24 is fixed to the outer surface of one arm piece 18a so as to be rotatable about the shaft 20, and a brake lining 25 is fixed to the clutch 24. Arm piece 1
A clutch base 26 is fixed to the shaft 20 on the side of the shaft 20 in correspondence with the clutch base 24, and a brake lining 27 is fixed on the inside of the clutch 26 so that it can come into contact with the brake lining 27. It has become. Axis 2
A nut 28 is screwed onto the left end of the arm 0, and a pressure spring 29 is interposed between the nut 28 and the arm piece 18b. Therefore, the entire shaft 20 is biased to the left in FIG. 1, and both brake linings 25, 27 are pressed against each other. An arm 30 is fixed to the right end of the shaft 20, perpendicular to the shaft 20, and as shown in FIG. 3, a leaf spring 31 is fastened and fixed to the tip of the arm 30.
A claw piece 32 is fastened to the tip of the spring 31.

That is, the arm 30, the leaf spring 31, and the claw piece 32 constitute a weft drawing member 74 that performs both weft separation and drawing.

The weft pulling member 74 is rotatable about the shaft 15, and the member supported by the shaft 15, that is, the forked 7-m 1
8. The balance weight 21 is adjusted so that the sum of the rotational moment due to the weight of the shaft 20, the clutch bases 24, 26, the weft pulling member 74, the balance weight 21, etc. becomes almost zero.
7fi51 and the center of gravity distance from the shaft 15 are set, and the rotational reaction from the gear 16 to the gear 17 due to the weight of each member supported by the shaft 15 is approximately zero.

As shown in FIG. 1, within the frame 12a, a hanging bracket 33 is attached to the support rail 7 on the right wall side of the frame 12a.
An air cylinder 34 is supported so as to be able to swing in the direction of the support rail 7 at the annular tip of the hanging bracket 33, which is fastened to the front surface and projects obliquely forward as shown in FIG. .

Near the bottom of the air cylinder 34, a shaft 35 is rotatably supported in a direction perpendicular to the support rail 7.
A bifurcated crank arm 36 is fixed to the front end of the crankshaft. Arm piece 363.36b of the same crank arm 36
A connecting shaft 37 is rotatably installed in between, and the coaxial 3
7 is slidably penetrated by a screw 38 from below. The screw 38 is screwed onto the tip of the drive rod 34a of the air cylinder 34, and a nut 39 is attached to the screw 38.
are screwed together. A pressing spring 40 is interposed between the nut 39 and the connecting shaft 37, so that the connecting shaft 37 and the head of the screw 38 are always in contact with each other.

As shown in FIG. 3, a shaft 41 is located below the rear end of the shaft 35.
is rotatably supported, and gears 42 and 43 fixed to the rear ends of the shafts 35 and 41 are meshed with each other. A support arm 44 is fixed to the front end of the shaft 41 so as to be perpendicular to the shaft 41, and a driven roller 45 is rotatably supported at the tip of the arm 44. The driven roller 45 is always in the retracted position shown by the solid line in FIG. 1, and when the crank arm 36 is moved downward by the operation of the air cylinder 34, the driven roller 45 is rotated from the retracted position to the position shown by the chain line. The air cylinder 34 is activated when the drive motor 10 is switched from forward rotation to reverse rotation.

As shown in Fig. 1, the gears 42 and 43 and the hanging bracket 1
A shaft 46 is rotatably supported between the shafts 35 and 41, and a drive roller 47 is fixed to the center of the shaft 46, and a gear 48 is mounted at the front end of the shaft 46. It is attached. As shown in FIG. 3, a motor 49 is disposed slightly ahead and above the gear 48, and the drive gear 49a and the gear 48 are meshed with each other. The motor 49 is operated based on the weft insertion error detection signal, and thereby the drive roller 47 is rotated in the direction of the arrow shown in FIG. The driven roller 45 is brought into pressure contact with the driving roller 47 by the operation of the air cylinder 34, and is rotated together with the driving roller 47.

As shown in FIG. 1, a support piece 50 is fixed to the right side of the hanging bracket 14, and a suction pipe 51 connected to a suction device (not shown) is vertically supported on the support piece 50. ing. The suction port 51a of the pipe 51 is arranged on the lower surface side of the drive roller 47. The suction device is activated based on a cotton insertion error detection signal.

Next, to explain the weft separation device 13 in detail, as shown in FIG. A frame 13a is fastened to the upper surface, and the drive shaft 9 is rotatably passed through both side walls of the frame 13a. The mechanism inside the frame 13a is almost the same as the mechanism supported by the hanging bracket 14 in the weft drawing device 12, and the rotational drive of the drive shaft 9 is carried out by a gear 53 which is meshed with a gear 53 fixed to the same shaft 9. A shaft 5 rotatably installed between the forked ends of the hanging bracket 52 via the
5. The gear ratio of the gear 54 to the gear 53 is the same as that of the gear 1 to the gear 17 in the weft pulling device 12.
The tooth ratio of 6 is set larger than 1. A bifurcated arm 56 is rotatably supported on the shaft 55, and a shaft 57 is disposed between the distal ends of arm pieces 56a and 56b of the arm 56.
is rotatably supported. A balance weight 58 similar to the balance weight 21 on the weft pulling device 12 side is fixed to the connecting base end of the bifurcated arm 56.

Also on this weft separation device 13 side, the balance weight 5
8 is a pair of strikes.

The rotation range of the bifurcated arm 56 is restricted by contact with a pad (not shown). Arm pieces 55a, 56b
In between, the shaft 55.57 has a timing pulley 59.6.
A timing belt 61 is installed between both pulleys 59 and 60. A nut 62 is screwed onto the left end of the shaft 57, and a pressure spring 63 is interposed between the nut 62 and the arm piece 66b. Therefore, the entire shaft 57 is biased to the left, and the brake lining 65 is fixed to the clutch base 64 on the arm piece 56a side.
and the brake lining 67 fixed to the clutch stand 66 of the shaft 57 are pressed together. At the right end of the shaft 57 is an arm 6.
8 is fixed perpendicularly to the axis 57, and the 7.8
As shown in the figure, a wide leaf spring 69 is attached to the tip of the arm 68.
is tightened and fixed, and a plurality of notches 69a (five in this embodiment) are formed on the distal end side of the spring 69. Then, by each notch 69a, the minute JI
A claw piece 71 is fastened and fixed to the tip of each of the plurality of spring pieces 69b (six in this embodiment). That is, there are 7 weft separation members that perform only the weft separation action using the arm 68, the leaf spring 69, and the plurality of claw pieces 71.
It consists of 5.

The weft separation member 75 is rotatable around the shaft 55,
a member supported on the shaft 55, i.e. a bifurcated arm 56;
The weight of the balance weight 58 and the distance between the centers of gravity of the shaft 55 are set so that the sum of the rotation moments due to gravity of the shaft 57, the clutch stands 64, 66, the weft separation member 75, the balance weight 58, etc. is approximately zero, The rotational reaction from the gear 54 to the gear 53 due to the weight of each surface member supported by the shaft 55 is approximately zero.

In this embodiment, when a weft insertion error occurs, the error thread processing is performed based on the error thread processing program. Therefore, the operation of mis-thread processing when a weft-insertion error occurs will be explained next.

When a weft insertion error occurs, the erroneous yarn Y is woven into the front w1 of the woven fabric W as described above, and the erroneous yarn Y is woven into the weft insertion error following the erroneous yarn Y during machine inertia operation based on the weft insertion error detection signal. Weft insertion of the weft that is about to be ejected from the main nozzle I is prevented on the weft/III length storage device side. After the machine is stopped, the machine is automatically reversed from the first position, and the reed 3 is stopped at the most retracted position shown in FIG. With this reversal of the machine, the warp threads T1 and T2 reach the maximum opening state shown in FIG. Therefore, the gripping state of the misplaced yarn Y by the warp threads TI and T2, that is, the weaving state, is released.

Based on the weft insertion error detection signal, the drive motor 10 is rotated forward after the machine is reversed, and the drive shaft 9 is thereby rotated in the direction indicated by arrow P in FIGS. 3 and 7.

The rotation of the drive shaft 9 is transmitted to the shaft 15 via the gears 17 and 16 in the weft pulling device 12, and to the shaft 55 via the gears 53 and 54 in the weft separating device 13.

As shown in FIG. 3, on the weft pulling device 12 side, the axle load 5 is rotated in the direction of the arrow Q shown in the same figure, and this rotation is transmitted to the shaft 20 via the timing belt 23, and the same shaft 20 is connected to the shaft 15. rotated in the same direction. In this case, the forked arm 18 side and the shaft 20 side are connected to the brake lining 25.
27, so that the bifurcated arm 1
8 and the shaft 20, a frictional torque corresponding to the acting force of the pressing spring 29 exists. Therefore, if the relative rotational force of the shaft 20 with respect to the bifurcated arm 18 is less than the above-mentioned friction torque, no relative rotation will occur between the two, and the bifurcated arm 18 and the shaft 20 will not rotate. They are integrally rotated clockwise about the shaft 15 from the state shown in FIG.

As shown in FIG. 3, the horizontally disposed state of the bifurcated arm 18 is maintained by a braking mechanism in the drive motor 10. In this state, the rotational moment due to the self-important element of the weft pulling member 74 becomes maximum, and in a configuration in which the rotational moment due only to this self-important element acts on the drive motor 10 side, that is, a configuration without the balance weight 21, the same rotational moment is applied to the brake lining 25. The shaft 20 and the weft pulling member 74 are urged in the downward movement direction against the friction torque between . When the rotational moment exceeds the friction torque, the forked arm 18 moves downward;
A relative rotation occurs between the two brake linings 25, 27, causing the shaft 20 and the weft thread extraction member 74 to rotate counterclockwise in FIG.

However, the balance weight 2 is attached to the bifurcated arm 18.
In this embodiment, in which the sum of the rotation moments due to the weight of each member supported by the shaft 20 is reduced to almost zero by adding 1, relative rotation occurs between the bifurcated arm 18 and the shaft 20. Never. Therefore, there is no possibility that the weft pulling member 74 will move downward in the retracted state shown in FIG.
, the weft pulling member 74 realizes its original rotating state.

As the bifurcated arm 18 and shaft 20 rotate, the claw pieces 3
The tip of 2 slides on the woven fabric W and moves toward the woven fabric Wl side. Then, as shown in FIG. 9, when the tip of the claw piece 32 reaches the woven fabric W1, the tip of the claw piece 32 engages with the missed yarn Y, and the missed yarn Y near the weft pulling device 12 is pulled out from outside the warp opening. The claw piece 32 entering the warp opening separates the warp from the woven fabric W as shown in FIG. Since the rotational moment about the shaft 20 is almost zero, the reaction caused by this rotational moment is not transmitted from the gear 16 to the gear 17 side, and the chain line in FIG. 4 moves from the retracted position shown in FIG. The weft pulling member 74 is smoothly rotated to the engagement position with the woven fabric W shown in FIG. The claw piece 32 slides on the fabric W between the chain line position and the solid line position shown in FIG. 4, and this sliding resistance is transmitted as a reaction to the forked arm 18 side via the brake lining 25, 27. However, the pressure spring 2
The friction torque between the two brake linings 25 and 27 caused by 9 sufficiently exceeds the sliding resistance, and no relative rotation occurs between the bifurcated arm 18 and the shaft 20, and the balance is maintained. Due to the presence of the weight 21, the rotational drive of the drive motor 10 is converted into smooth rotation of the forked arm 18 and the weft pulling member 74. Therefore, the claw piece 32 sliding on the woven fabric W moves smoothly at a speed corresponding to the rotational driving force of the drive motor 10, and separates the misplaced yarn Y from the woven fabric W1 while rubbing the woven fabric W1. In other words, the drive motor 1 is responsible for setting the appropriate moving speed of the pawl piece 32, which requires an extremely delicate operation of separating one erroneous thread from the fabric Wl.
This is easily achieved by keeping the driving force constant at zero.

On the other hand, on the weft separation device 13 side, the shaft 55 is connected to the shaft 1
This rotation is transmitted to the shaft 57 via the timing heald 61, and the same shaft 57 is rotated in the same direction as the shaft 55. in this case,
Similar to the weft pulling device 12 side, the forked arm 56 side and the shaft 57 side are pressure-connected via the brake lining 65, 67, so there is a pressing spring between the forked arm 56 and the shaft 57. There is a friction torque corresponding to the acting force of 63. Therefore, if the relative rotational force of the shaft 57 with respect to the forked arm 56 is less than the above-mentioned friction torque, no relative rotation will occur between the two, and the forked arm 56 and the shaft 57 will not rotate relative to each other. are integrally rotated clockwise about the shaft 55 from the state shown in FIG. In this case, the ratio of the number of teeth between the gears 16 and 17 of the 12 examples of the weft pulling device and the ratio of the number of teeth between the gears 33 and 34 on the weft separating device 13 side are set differently. When the claw pieces 32 are rotated to the position shown by the solid line in FIG. 4, the plurality of claw pieces 71 only reach the vicinity of the woven fabric W as shown by the chain line in FIG. Similarly to the weft pulling device 12 side, if the rotational moment due to the weight of each member supported by the shaft 55 exceeds the Fff friction torque, the forked arm 56 moves downward, and the relative movement between the brake linings 65 and 67 occurs. As a result, the shaft 57 and the weft separation member 75 are rotated counterclockwise in FIG. 7. However, in this embodiment, a balance weight 58 is added to the bifurcated arm 56ζ so that the sum of the rotation moments due to the weight of each member supported by the shaft 55 is reduced to almost zero. No relative rotation occurs between them. Therefore, there is no possibility that the weft separating member 75 will move downward in the retracted state shown in FIG. 7, and the weft separating member 75 realizes its original rotating state in the same way as the weft pulling member 74.

When the claw pieces 32 of the 12 examples of weft pulling devices reach the solid line position in FIG.
The forked arm 18 is prevented from rotating. Therefore, the arm 18 stops at the position shown in the solid line in FIG. 2o rotates relative to the forked arm 18. As a result, in a state where the claw piece 32 engages and holds the miss thread Y, the claw piece 32 is rotated clockwise around the shaft 20 from the chain line position shown in FIG. It is rotated to the solid line position outside the warp opening shown in the figure. That is, a part of the miss yarn Y that was engaged and held by the claw piece 32 is pulled out from inside the warp opening to outside the warp opening, and is drawn out and placed between the driving roller 47 and the driven roller 45.

At this point, on the weft separation device 13 side, as shown in FIG. A portion of Y1 is separated from the fabric front W1 into the warp opening. Due to the presence of the balance weight 58, the movement of the claw piece 71 sliding on the woven fabric W is as smooth as on the weft pulling device 12 side, and the operation of separating the misplaced yarn Y from the woven fabric W1 is effectively performed. be exposed.

When the misplaced yarn Y is pulled out and placed between the drive roller 47 and the driven roller 45, the drive motor 1O is stopped and reversely operated. It is rotated from the retracted position shown by to the chain line position where it comes into contact with the drive roller 47. Therefore, the misplaced yarn Y drawn out between both rollers 47 and 45 is caught on the driven roller 45 and
5 and a drive roller 47. At this point, the motor 49 is operated based on the weft insertion error detection signal, and the drive roller 47 is rotating in the direction of the arrow shown in FIG. As a result, the erroneous yarn Y, which is held under pressure between both rollers 47 and 45, is transferred to the suction port 51 of the suction pipe 51.
You will be guided to side a. In this state, as shown in FIG.
8 is spaced apart from the connecting shaft 37, and the driven roller 4
5 is pressed against a drive roller 47 by the action of a pressure spring 40. This pressure contact force can be changed as appropriate by adjusting the screwing position of the nut 39. Mistake thread Y is on both rollers 47, 4
5, a suction device (not shown) connected to the suction vibrator 51 is activated, and both rollers 4
The missed yarn Y guided to the idle suction port 51a side for 7.45 hours is sucked and introduced into the suction pipe 51 as shown in FIG. Therefore, the weft pulling device 12 and the weft separating device 1
3, the miss yarn Y separated from the fabric front W1 into the warp opening is sequentially pulled out from inside the warp opening to outside the warp opening by the cooperation of the rotation pulling action of both rollers 47 and 45 and the suction action of the suction vibrator 51. and is suctioned and removed into the suction pipe 51.

The rotation pulling action of both rollers 47 and 45 and the suction vibe 5
When pulling out a missed yarn in cooperation with the suction action of step 1, the pulling resistance is suppressed because the missed yarn is sufficiently separated in places other than the vicinity of the weft pulling device 13, and the missed yarn due to the weft pulling device 12 is pulled out. Pulling out is performed smoothly without fear of cutting the erroneous yarn Y.

The weft pulling device 12 is activated by the reverse operation of the drive motor 10.
On the side, the claw piece 32 and the bifurcated arm 18 are integrally rotated counterclockwise around the shaft 15, with the claw piece 32 being rotated outside the warp shedding, Nail piece 3
2 is moved from the chain line position to the solid line position shown in FIG.

Then, the balance weight 21 comes into contact with the stopper 73, and the rotation of the bifurcated arm 18 is stopped. Thereafter, similarly to the above, the claw piece 32 side overcomes the frictional torque between the brake linings 25 and 27 and rotates relative to the forked arm 18, returning from the solid line position in FIG. 6 to the retracted position shown in FIG. 3. do.

On the other hand, on the weft separation device 13 side, as shown in FIG. 8, a plurality of claw pieces 71 that have entered the warp shedding are rotated integrally with the bifurcated arm 56 from inside the warp shedding to outside the warp shedding. When the pawl pieces 32 of the 12 examples of weft pulling devices return to the retracted position, the weft thread pullers return to the retracted position shown in FIG. 7.

When the claw piece 32 and the plurality of claw pieces 71 return to the retracted position, the drive motor 10 is stopped, and when all the misplaced yarn Y is suctioned and removed into the suction vibrator 51, the motor 49 is connected to the suction vibrator 51. The operation of the suction devices is stopped, and the drive rod 34a of the air cylinder 34 returns to its original position.

Thereafter, the loom is automatically reversed by a predetermined amount, stopped at the rotation position most suitable for restarting, and the loom resumes operation.

In this way, in this embodiment, the drive motor 1 is
By using the additional configuration of the balance weight 21° 58, a means for reducing the sum of the rotational moment due to the weight of each member supported by the shafts 15 and 55 which are operatively connected to each other at zero is determined to be zero, and by adopting such a balance means. The moving speed and smoothness suitable for separating erroneous yarns can be set for the weft pulling member 74 and the weft separating member 75, and stable erroneous yarn separation processing can be performed.

In particular, on the weft pulling device 12 side, the weft pulling member 74 rotates around the shaft 15 and the weft pulling member 74 rotates around the shaft 20 in order to pull out the missed yarn Y that has been separated from the fabric front W1 to the inside of the warp opening to the outside of the warp opening. Two rotational movements of the weft pulling member 74 are adopted, and the friction torque between the brake linings 25 and 27 that realizes these two movements is within the rotational range of the trifurcated arm 18. The rotational moment between the forked arm 18 and the shaft 20 is exceeded by a clear difference. Therefore, the bifurcated arm 18
Within the rotation range of , no relative rotation occurs between the forked arm 18 and the shaft 20, and the mis-thread separating operation of the claw piece 32 shifts to the mis-thread pulling out operation as set in timing. , mis-thread separation and withdrawal are carried out smoothly.

In addition, on the weft separation device 13 side, the bifurcated arm 56 and the shaft 5
7 is not incorporated, but it is of course possible to incorporate the relative rotation as appropriate at the time of mis-thread separation.

Of course, the present invention is not limited to the above-mentioned embodiments. For example, as shown in FIG.
The side bifurcated arm 56 and the balance weight 58 are connected to the shaft 5.
An embodiment with a radially positionally adjustable clamping connection about 5 is also possible.

The number of claw pieces 71 used in the 13 examples of the weft separation device can be increased or decreased depending on the weaving density or yarn quality of the woven fabric, and the center of gravity of the balance weight 58 from the shaft 55 can be adjusted according to the number of claw pieces 71. By making appropriate adjustments, the rotation moment due to the weight of each member supported by the shaft 55 can be adjusted to zero.

Also on the weft pulling device 12 side in the embodiment, for example, a plurality of claw pieces are removably fixed to the fork-like arm 18, and the plurality of claw pieces remove the missed yarn before the claw piece 32 pulls out the missed yarn. It is also possible to adopt a configuration in which the fabric is separated from the fabric. In such a configuration, by using a configuration in which the mounting position of the balance weight can be adjusted in the same way as described above, when increasing or decreasing the number of miss thread separation claw pieces according to weaving density or yarn quality, etc., the same method as described above can be used. Rotation moment can be adjusted to zero.

Further, in the above embodiment, the weft pulling device 12 and the weft separating device 13 are driven by a single drive motor 10, but if the weft pulling device 12 and the weft separating device 13 are driven and controlled by separate drive motors, both devices can be operated. 12. The setting of the rotational moment in 13 works more effectively,
The moving states of the weft pulling member 74 and the weft separating member 75 can be set more appropriately.

Note that a spring mechanism can also be used as a balance means capable of setting the rotational moment to zero or a value other than zero that clearly differs from the friction torque.

Furthermore, the present invention can be applied not only to the treatment of erroneous yarns, but also to the separation treatment of weft yarns inserted during inertial operation immediately before an artificial stop of the machine from the woven fabric.

Effects of the Invention As detailed above, according to the weft processing device of the present invention, it is possible to easily set the extremely delicate motion required of the weft separation member in separating a single weft from the fabric. This provides an excellent effect in that the weft separation process can be carried out smoothly.

[Brief explanation of drawings]

1 to 11 show an embodiment embodying the present invention, FIG. 1 is a front sectional view showing a weft pulling device and a weft separation device, FIG. 2 is a plan view of the road body, and FIG. 3 is a weft thread separation device. FIGS. 4 to 6 are side sectional views of the weft pulling device; FIGS. 4 to 6 are side sectional views of the weft pulling device; FIG. 7 is a side sectional view of the weft separating device; and FIG. 8 is a side sectional view of the weft separating device. 9 to 11 are operational views for explaining weft separation and draw-out, and FIG. 12 is a front sectional view showing another example of the present invention.

Claims (1)

[Claims] 1. A weft separation member that rotates into the warp shedding while rubbing the front of the fabric from outside the warp shedding while forming an open warp state and releasing the weft weft that was woven into the fabric just before the machine stopped. A weft processing device for a shuttleless loom, comprising: a balance means for keeping the rotational moment of the weft separating member substantially constant at least within a rotational range of the weft separating member.