JPH0633545B2 - Weft processing method for shuttleless loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a weft processing method in a shuttleless loom such as a jet loom, a rapier loom or a gripper loom.

(Prior art) With regard to shuttleless looms such as jet loom, we can expect much higher productivity than the shuttleless looms, and the tendency to adopt the shuttleless looms has been remarkable in recent years, but weft insertion errors have occurred. It is a well-known fact that the ratio is higher than that of the shuttlecock loom. When a weft insertion error occurs, the machine is stopped based on the weft insertion error detection signal from the weft detector, but in high-speed weaving machines such as a shuttleless loom, one machine revolution or more is taken into consideration to prevent damage to each part. Since the machine base is stopped after the inertial operation, a weft thread that has been miss-inserted (hereinafter referred to as a miss thread) is beaten and woven into a woven fabric immediately before the machine base is stopped. For this reason, it is necessary to reverse the machine base to release the grasped state of the miss yarn by the warp and remove the miss yarn, but conventionally, this miss yarn removal work has been performed by acquisition. However, since the miss yarn is struck in the woven fabric almost in the same manner as the normal weft yarn, even if the warp yarn is in the maximum open state, the grasping state of the miss yarn by the warp yarn is not sufficiently released. Therefore, it is not easy to remove the miss yarn, and the removing operation becomes very complicated, and the stop time of the loom becomes long, which hinders the productivity improvement required for the high-speed loom.

One example of trying to solve such a problem is JP-A-58-58.
It is disclosed in Japanese Patent No. 220856.

In this conventional device, as shown in FIG. 13, a first pneumatic cylinder 2 is provided in a main frame 1 that is movably suspended on a guide rail (not shown) provided in the weft width direction,
An auxiliary frame 3 is attached to the piston rod 2a. A second pneumatic cylinder 4 is attached to the auxiliary frame 3, and a third pneumatic cylinder 5 is attached to its piston rod 4a. A receiving body 6 is provided on the cylinder 5 side, and a pressing body 7 is provided on the piston rod 5a side of the pneumatic cylinder 5 so that the weft can be held by both. Further, a pair of pull-out rollers 8 and 9 are provided in the lower portion of the auxiliary frame 3, and elastic fingers 10 are provided below the auxiliary frame 3 so as to reciprocally swing so as to draw a substantially elliptical locus. There is.

That is, this conventional miss yarn processing device is always retracted to a predetermined retracted position and is moved to a predetermined position along the guide rail when a weft insertion error occurs. And
The second pneumatic cylinder 4 is actuated to move the receiving body 6 and the pressing body 7 downward, and one pulling roller 9 is pushed away to insert the receiving body 6 and the pressing body 7 into the warp opening, and at the same time, the fingers. 10 is inserted from outside the warp opening into the opening while hooking the miss thread. As a result, the miss yarn is separated from the woven fabric W and is passed between the receiving body 6 and the pressing body 7, and the third yarn is operated by the third pneumatic cylinder 5 to press the miss yarn against the receiving body 6. It is grasped by the body 7. After that, the second pneumatic cylinder 4 is operated to move the receiving body 6 and the pressing body 7 upward, pull out the miss yarn from the warp yarn opening, and drive both pulling rollers 8 and 9 to remove all the miss yarns. It is pulled out from within the warp shed. The miss yarn thus drawn out is sucked and removed from the suction pipe 11 provided in the auxiliary frame 3.

(Problems to be Solved by the Invention) The first requirement in the above-described conventional device is that the finger 10 catches the miss yarn that is struck in the weaving cloth and reliably separates the miss yarn from the weaving cloth. It is to be. Needless to say, the extremely delicate operation of the finger 10 is required to separate one miss yarn from the cloth fell, and the finger is slid on the cloth to rub the cloth from the outside of the warp opening into the warp opening. In the means for advancing the tip of the finger 10 and hooking the miss thread on the tip of the finger 10 to separate it from the cloth fell into the warp shed, the moving speed of the tip of the finger 10 has a great influence on the miss thread separating action. That is, when the moving speed of the finger 10 is high, there is a possibility that the miss thread may fail to be caught despite the fact that the tip of the finger 10 engages with the miss thread that is struck in the cloth fell. Therefore, it suffices to appropriately suppress the moving speed of the finger 10 to surely perform the miss yarn hooking action, but if such a corresponding means is adopted, the miss yarn is separated from the cloth fell and the miss yarn is separated from the warp opening. This increases the time taken to pull out the miss yarn from the warp shed and hinders the improvement in productivity required for the high-speed loom.

Configuration of the Invention (Means for Solving the Problems) Therefore, in the present invention, the weaving state of the weft yarn that is woven into the woven fabric immediately before the machine base is stopped by releasing the weaving state is formed, and the weaving state is released near the upper part of the cloth fell. At the time of moving the weft separating member of the weft processing device that performs the weft separating process along the weft separating path that scrapes the weaving cloth from the predetermined retracted position, the weft thread is located near the cloth cutting part of the weft separating path. The moving speed of the separating member is switched to a low speed, the low speed movement separates the weft from the cloth fell into the warp shed, and then the moving speed of the weft separating member is switched from the low speed to the high speed to move to the retracted position. I tried to return to.

(Operation) That is, when a weft insertion error occurs and the miss yarn is woven into the woven fabric, the open state of the warp yarn is formed to cancel the woven state of the miss yarn woven into the woven fabric. Activate the processor. As a result, the weft separating member of the weft processing device enters the warp opening from the retracted position outside the warp opening along the weft separating path that rubs the cloth cloth, and separates the miss yarn from the woven cloth. On the weft path, the moving speed of the weft separating member from the retracted position to the vicinity of the cloth fell is set higher than the moving speed of the weft separating member from the vicinity of the cloth fell to the miss yarn separating position in the warp opening. Has been done. That is, the moving speed of the weft separating member is set to a low speed such that the miss yarn can be hooked and reliably separated from the cloth fell between the vicinity of the cloth fell and the miss yarn separating position in the warp opening. Thread separation can be done without any problems. On the other hand, the moving speed of the weft separating member is set as high as possible on the path from the retracted position that is not directly related to the miss yarn separation to the vicinity of the cloth fell, The time required for the weft separating member to reach the vicinity of the cloth fell is short.

After that, the weft separating member that performs only the weft separating action returns from the inside of the warp opening to the retracted position outside the warp opening along the path for releasing the separated miss yarn, and the weft separating operation and the weft withdrawal from the warp opening. The weft separating member which also acts moves from the inside of the warp opening to the outside of the warp opening while holding the separated miss yarn. Therefore, a part of the miss yarn separated from the cloth fell into the warp opening is pulled out from the inside of the warp opening to the outside of the warp opening and can be removed by an appropriate means. The weft separating member that has pulled out the miss yarn from the inside of the warp opening to the outside of the warp opening returns to the retracted position by releasing the miss yarn, and prepares for the next weft insertion error together with the weft separating member that performs only the weft separating operation. The moving speed of each of the two weft separating members is switched from a low speed to a high speed at a predetermined time after weft separation, and returns to the retracted position by this high speed movement. That is, the weft separating member can be moved at an appropriately high speed except on the route directly related to the miss yarn separation,
It enables reliable miss yarn separation and high-speed processing of miss yarn.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 2, reference numeral 21 denotes a weft insertion main nozzle mounted on one end side of a sley (not shown), which is guided into the main nozzle 21 via a weft measuring and storing device (not shown). Is inserted into the weft guide passage S formed by a plurality of weft guide members 22 arranged side by side on the sley from the main weft insertion nozzle 21. In this embodiment, a so-called drum type weft measuring and storing device is used as the weft measuring and storing device, in which wefts are wound on a drum and measured and stored. The weft yarns inserted into the weft yarn guide passage S are sequentially relayed from the weft insertion main nozzle 21 side by an auxiliary nozzle (not shown) which faces the weft yarn guide member 22 and is arranged at predetermined intervals in the weft insertion direction. To be done.

When the weft yarn ejected from the weft-inserting main nozzle 21 is properly weft-inserted and reaches the cloth end of the woven fabric W on the side opposite to the main nozzle, during the beating operation, that is, the weft guide member 22 together with the sley. While the fabric advances toward the woven fabric W side, the weft yarn escapes from the guide hole 22a of the weft yarn guide member 22 through the slit 22b, and the weft yarn is struck by the reed 23 on the cloth fell W1 of the woven fabric W. The cloth W is woven and cut by a cutter 24 provided near the cloth end on the weft insertion main nozzle 21 side of the cloth W. Then, the subsequent weft insertion is continued.

When a weft insertion error occurs such that the weft does not reach the cloth end on the side opposite to the main nozzle, a weft detector (not shown) provided in the weft guide member 22 located near the cloth end causes a weft insertion error. Is detected, and the machine base is stopped based on the weft insertion error detection signal from the same detector. The weft detector is the slit 2 of the weft guide member 22.
The weft insertion error detection signal is generated when the weft thread does not pass through the slit 22b at the time of beating.

After the weft insertion error detection signal (which is also a machine standstill signal) is issued, the machine stand rotates about once about inertia and stops immediately before beating. Woven W
Is woven into. Further, the weft insertion following the miss yarn Y is about to be performed during the machine base inertia operation, but the weft insertion from the weft measuring and storing device is prevented based on the weft insertion error detection signal. That is, in order to control the measurement storage of the weft on the drum and the shift to the weft inserting direction, the weft locking pin protruding and retracting from the drum is maintained in the protruding state based on the weft insertion error detection signal, The unwinding and unwinding of the winding yarn is prevented.

Support brackets 25 and 26 are erected on both left and right side frames (not shown).
A support rail 27 having a U-shaped cross section is provided between the Nos. 5 and 26. Suspension brackets 28 are fastened to the front surfaces of both ends of the support rail 27, and a drive shaft 30 is rotatably suspended and supported at the lower end thereof. A gear motor 31 capable of rotating in the forward and reverse directions is mounted on one of the support brackets 25, and a driven gear 32 fixed to the drive shaft 30 is meshed with a drive gear 31a of the motor 31. Speed change motor 3
1 is operated in the forward rotation direction based on the weft insertion error detection signal.

At the end of the support rail 27 on the side of the main nozzle 21 for weft insertion, a weft drawing device 33 that performs both functions of weft separation and weft drawing processing is arranged, and the remaining part of the support rail 27 is separated from the weft. A plurality of weft separating devices 34 that perform only the operation are arranged at a predetermined interval, and a combination of these devices 33 and 34 constitutes the entire weft processing device.

The weft pulling device 33 will be described in detail. As shown in FIGS. 1 and 3, the frame 33a is fixed to the support rail 27 so that the drive shaft 30 can rotatably pass through both side walls. A bifurcated suspension bracket 35 is fastened and fixed to the front surface of the support rail 27 on the left side wall (left side in FIG. 1) of 33a. A shaft 36 is rotatably supported between both supporting pieces 35a and 35b at the tip of the bracket 35, and a gear 37 is stopped at the left end of the shaft 36 on the side of the suspension bracket 35 in FIG. The gear 38 is attached and meshes with a gear 38 fixed to the drive shaft 30. The gears 37 and 38 have the same number of teeth, and the gear 37 rotates once for each rotation of the gear 38. Both support pieces 35 of the hanging bracket 35
A fork-shaped arm 39 is rotatably supported by the shaft 36 between a and 35b, and a timing pulley 40 is fixedly attached to the shaft 36 in the arm 39. A shaft 41 is rotatably supported between the tip ends of the arm pieces 39a and 39b. Bifurcated arm 3
A balance weight 42 is fixed to the connecting base end portion of 9, and the balance weight 42 comes into contact with a pair of stoppers (not shown) provided on the suspension bracket 35 to rotate the bifurcated arm 39. Is regulated. A timing pulley 43 is fixed to the shaft 36 between the arm pieces 39a and 39b, and a timing belt 44 is hung between the pulley 43 and the timing pulley 40. The diameters of both pulleys 40 and 43 are set to be the same.

As shown in FIGS. 1 and 3, a proximity switch S1 composed of a magnetic sensor is arranged on the inner surface of one of the support pieces 35a of the suspension bracket 35 at a predetermined distance from the shaft 36. A magnet M1 is arranged on the side surface of the coupling base end portion of 39 at a predetermined distance from the shaft 36. As shown in FIG. 3, when the bifurcated arm 39 is in the retracted position in a substantially horizontal state, the proximity switch S1 and the magnet M1 are set to form an angle θ1 about the shaft 36. The proximity switch S1 is placed in an operating state based on the weft insertion error detection signal, and when the switch S1 and the magnet M1 face each other in this operating state, the speed change motor 31 is switched from high speed rotation to low speed rotation. ing.

A clutch base 45 is rotatably attached to the outer surface of one arm piece 39a with respect to the shaft 41, and a brake lining 46 is attached to the base 45. Arm piece 3
On the side of 9a, a clutch base 47 is fixed to the shaft 41 in correspondence with the clutch base 45, and a brake lining 48 is fixed to the inside of the base 47 so that the brake lining 48 can come into contact with the brake lining 46. It has become. Axis 4
A nut 49 is screwed to the left end portion of No. 1 and a pressing spring 50 is interposed between the nut 49 and the arm piece 39b. Therefore, the entire shaft 41 is biased to the left in FIG. 1, and both brake linings 46 and 48 are pressed against each other. An arm 51 is fixed to the right end of the shaft 41 so as to be orthogonal to the shaft 41, and a leaf spring 52 is fixed to the tip end of the arm 51 as shown in FIG. A weft separating member 53 is fixed to the front end of the.

As shown in FIGS. 1 and 3, a pair of proximity switches S2 and S3 similar to the proximity switch S1 are provided on the outer surface of one arm piece 39a of the bifurcated arm 39 with a predetermined distance from the shaft 41. The magnet M2 is disposed on the inner side surface of the clutch base 47 at a predetermined distance from the shaft 41. As shown in FIG. 3, the pair of proximity switches S2, S3 are set so as to form an angle θ2 about the shaft 41, and when the bifurcated arm 39 and the arm 51 have the arrangement relationship shown in FIG. M2 faces one proximity switch S2. Both proximity switches S2 and S3 are placed in the operating state based on the weft insertion error detection signal, and in this operating state, the magnet M2
Is opposed to the proximity switch S2, the transmission motor 31 in reverse rotation is stopped, and the magnet M2 is moved to the proximity switch S3.
When facing, the speed change motor 31 in the forward rotation is reversely operated, and the rotation speed of the motor 31 is switched from the low speed rotation to the high speed rotation.

As shown in FIG. 1, a suspension bracket 54 is provided in the frame 33a on the right side wall side of the frame 33a for supporting rails 2.
The air cylinder 55 is swingably supported in the direction of the support rail 27 at the annular front end portion of the suspension bracket 54 which is fixedly fastened to the front surface of the suspension bracket 7 and which is inclined and projected forward as shown in FIG. There is. The shaft 5 is provided near the lower part of the air cylinder 55.
6 is rotatably supported in a direction orthogonal to the support rail 27, and a bifurcated crank arm 57 is fixed to the front end of the coaxial shaft 56. A connecting shaft 58 is rotatably installed between the arm pieces 57a and 57b of the crank arm 57, and a screw 59 is slidably penetrated from the lower side to the coaxial shaft 58. The screw 59 is screwed onto the tip of the drive rod 55a of the air cylinder 55, and
A nut 60 is screwed onto the shaft 9. And nut 6
A pressing spring 61 is interposed between 0 and the connecting shaft 58 so that the connecting shaft 58 and the head of the screw 59 are always in contact with each other.

As shown in FIG. 3, a shaft 62 is provided below the rear end of the shaft 56.
Is rotatably supported, and gears 63 and 64 fixed to the rear ends of the shaft 56 and the shaft 62 are meshed with each other. A support arm 65 is fixed to the front end of the shaft 62 so as to be orthogonal to the shaft 62, and a driven roller 29 is rotatably supported at the tip of the arm 65. The driven roller 29 is always in the retracted position shown by the solid line in FIG. 1, the crank arm 57 is moved downward by the operation of the air cylinder 55, and the driven roller 29 is rotated from the retracted position to the position shown by the chain line. The air cylinder 55 is operated when the transmission motor 31 is switched from the forward rotation operation to the reverse rotation operation.

As shown in FIG. 1, the gears 63, 64 and the suspension bracket 3
5, a shaft 66 is rotatably supported in parallel with the shafts 56, 62, a drive roller 67 is fixed to the central portion of the coaxial 66, and a gear 68 is provided at the front end. It is fastened. As shown in FIG. 3, a motor 69 is disposed slightly in front of and above the gear 68, and the drive gear 69a and the gear 68 mesh with each other. The motor 69 is operated based on the weft insertion error detection signal, and the drive roller 67 is thereby rotated in the direction of the arrow shown in FIG. Then, the driven roller 29 is brought into pressure contact with the driving roller 67 by the operation of the air cylinder 55, and is rotated together with the driving roller 67.

As shown in FIG. 1, a support piece 70 is fixed to the right side surface of the suspension bracket 35, and a suction pipe 71 connected to a suction device (not shown) is vertically supported by the support piece 70. ing. The suction port 71 a of the pipe 71 is arranged on the lower surface side of the drive roller 67. The suction device is operated based on the weft insertion error detection signal.

Next, the weft separating device 34 will be described. As shown in FIG. 1, a bifurcating suspension bracket 72 is fastened and fixed to the front surface of the support rail 27. A frame 34a is fastened and fixed to the upper surface,
The drive shaft 30 rotatably passes through both side walls of the frame 34a. The mechanism in the frame 34a is almost the same as the mechanism supported by the suspension bracket 35 in the weft drawing device 33, and the rotational drive of the drive shaft 30 is performed by the coaxial 30.
It is transmitted to a shaft 75 rotatably installed between the forked ends of the suspension bracket 72 via a gear 74 fixed to the gear 73 and a gear 74 meshed with the gear 73. The gear ratio of the gear 74 to the gear 73 is set to be larger than the gear ratio 1 of the gear 38 to the gear 38 in the weft drawing device 33. A bifurcated arm 76 is rotatably supported by the coaxial shaft 75, and a shaft 77 is rotatably supported between tip ends of arm pieces 76a and 76b of the arm 76. A balance weight 78, which is similar to the balance weight 42 on the side of the weft drawing device 33, is fixed to the connecting base end of the bifurcated arm 76. Also on the weft separating device 34 side, the balance weight 78 is brought into contact with a pair of stoppers (not shown) so that the range of rotation of the bifurcated arm 76 is restricted. Timing pulleys 79 and 80 are fixed to the shafts 75 and 77 between the arm pieces 76a and 76b, and a timing belt 81 is hung between the pulleys 79 and 80. A nut 82 is screwed onto the left end of the shaft 77, and a pressing spring 83 is interposed between the nut 82 and the arm piece 76b. Therefore, the entire shaft 77 is urged to the left, and the brake lining 85 fixed to the clutch base 84 on the arm piece 76a side and the clutch base 86 on the shaft 77 side.
The brake lining 87, which is fixed to, is pressed.
An arm 88 is fixed to the right end of the shaft 77 so as to be orthogonal to the shaft 77, and a wide leaf spring 8 is attached to the tip of the arm 88.
9 is fixed, and a plurality of notches 89a (five in this embodiment) are formed on the tip side of the spring 89. Then, the weft separating members 90 are respectively fixed to the tips of the plurality of spring pieces 89b (six pieces in this embodiment) divided by the notches 89a.

In the present embodiment, when a weft insertion error occurs, the miss yarn processing is automatically performed based on the miss yarn processing program. Therefore, the operation of the miss yarn processing when a weft insertion error occurs will be described below.

When a weft insertion error occurs, the miss yarn Y is woven into the cloth fell W1 of the woven fabric W as described above, and based on the weft insertion error detection signal, the miss yarn Y is continuously inserted for weft insertion during the machine inertia operation. The weft insertion of the weft that is about to be ejected from the main nozzle 21 is blocked on the side of the weft measuring and storing device. After the machine stand is stopped, the machine stand is automatically reversed about once and a half times, and the reed 23 is stopped at the last retracted position shown in FIG. With this reverse rotation of the machine, the warp yarns T1 and T2 reach the maximum open state shown in FIG. Therefore, the gripped state of the miss yarn Y by the warp yarns T1, T2, that is, the weaved state is released.

Based on the weft insertion error detection signal, the transmission motor 31 is rotated in the normal direction at a high speed after the machine base is rotated in reverse, whereby the drive shaft 30 is rotated in the direction indicated by the arrow P in FIGS. Drive shaft 3
In the weft pull-out device 33, the rotation of 0 rotates the gear 38
And 37 to be transmitted to the shaft 36, and the weft separating device 34
Is transmitted to the shaft 75 via gears 73 and 74.

As shown in FIG. 3, on the weft drawing device 33 side, the shaft 36 is rotated in the direction of the arrow Q shown in the same figure, and this rotation is transmitted to the shaft 41 via the timing belt 44, and the coaxial shaft 41 and the shaft 36 are the same. Is rotated in the direction. In this case, the bifurcated arm 39 side and the shaft 41 side are provided with the brake linings 46,
Since it is pressure-contacted via 48, the bifurcated arm 3
A friction torque corresponding to the acting force of the pressing spring 50 exists between the shaft 9 and the shaft 41, and relative rotation does not occur between them. Therefore, the bifurcated arm 39 and the shaft 41 are integrated with each other and rotate about the shaft 36 in the clockwise direction from the state shown in FIG. When the weft separating member 53 rotates by the angle θ1 along the path C1 shown in FIG. 4 to reach the solid line position near the cloth fell W1, the magnet M1 faces the proximity switch S1 and the transmission motor 31 rotates at high speed. To low speed rotation. In this state, the forked arm 39 and the shaft 41
As the parts integrally rotate, the tip of the weft separating member 53 moves slowly toward the cloth fell W1 while sliding on the cloth W. Then, as shown in FIG. 9, when the front end of the weft separating member 53 reaches the cloth fell W1, the front end of the weft separating member 53 engages with the miss yarn Y, and the miss yarn Y near the warp drawing device 33 is opened. It is separated from the woven cloth W as shown in FIG. 10 by the weft separating member 53 which enters the warp opening from the outside. The moving speed of the weft separating member 53 rubbing the cloth fell W1 from the solid line position in FIG. 4 to the chain line position in the warp shed is route C.
1 is extremely slow compared with the above, and the miss thread hooking action by the tip of the weft separating member 53 is surely performed,
There is no risk of miss thread separation failure.

On the other hand, on the weft separating device 34 side, the shaft 75 is
6 is rotated in the same direction as the arrow R shown in FIG. 7, and this rotation is transmitted to the shaft 77 via the timing belt 81, and the coaxial 77 is rotated in the same direction as the shaft 75. In this case, similar to the side of the weft drawing device 33, the bifurcated arm 76
Side and the shaft 77 side are press-contacted to each other via the brake linings 85 and 87, so that the bifurcated arm 76 and the shaft 77 are connected.
There is a friction torque corresponding to the acting force of the pressing spring 83 between and, and no relative rotation occurs between them. Therefore, the bifurcated arm 76 and the shaft 77 are integrated to form the shaft 7.
It rotates in the clockwise direction from the state shown in FIG. In this case, the gear 3 on the weft drawing device 33 side
The ratio of the number of teeth between 7, 38 and the gear 7 on the weft separating device 34 side
Since the ratio of the number of teeth between 3,74 is set differently,
When the weft separating member 53 on the weft pulling device 33 side is pivotally arranged to the position shown by the solid line in FIG. 4, the weft separating member 90 has reached the solid line position along the weft separating path D shown in FIG. Only to do.

When the weft separating member 53 on the side of the weft drawing device 33 reaches the position of the chain line in the warp opening shown in FIG. 4, the balance weight 42 comes into contact with the first stopper (not shown) and the bifurcated arm 39 is rotated. Be blocked. Therefore,
The arm 39 stops at the position shown by the chain line in FIG.
The rotation power of the shaft 41 by the speed change motor 31 is generated by the bifurcated arm 3
The friction torque between the 9 side and the shaft 41 side is overcome, and the shaft 41
Rotates relative to the bifurcated arm 39. As a result, as shown in FIG. 10, the weft separating member 53 causes the miss yarn Y
, The weft separating member 53 is rotated clockwise about the shaft 41 from the position shown by the chain line in FIG. 5 along the weft drawing path C2 shown in FIG.
The weft separating member 53 is rotatably arranged to the solid line position outside the warp shed shown in FIG. That is, a part of the miss yarn Y, which is engaged and held by the weft separating member 53, is pulled out from the inside of the warp opening to the outside of the warp opening, and is arranged between the drive roller 67 and the driven roller 29. In the weft drawing path C2, the moving speed of the weft separating member 53 is further reduced as compared with that on the path C1 '. That is, since the timing pulleys 40 and 43 with the timing belt 44 are set to have the same diameter, the rotation speeds of the shaft 36 and the shaft 41 are the same, and the weft separation from the shaft 41 in FIGS. This is because the distance to the tip of the member 53 is shorter than the distance from the shaft 36 to the tip of the weft separating member 53. If the miss yarn Y is pulled out from the inside of the warp yarn to the outside of the warp yarn opening at such a low speed, although the grasping by the warp yarns T1 and T2 is eliminated, the cutting of the miss yarn Y showing appropriate pulling resistance is cut. Is definitely avoided. Of course, the diameter of the timing pulley 43 is appropriately set smaller than the diameter of the timing pulley 40, and the weft separating member 5 on the path C1 is set.
It is also possible to make it equal to or slightly faster than the moving speed of No. 3.

At this point, on the weft separating device 34 side, the weft separating member 90 has entered the warp opening along the weft separating path D ′ shown in FIG. 8 while rubbing the cloth fell W1 from the solid line position outside the warp opening, A part of the miss yarn Y1 near the weft separating device 34 is separated from the cloth fell W1 into the warp shed. When the weft separating member 90 is moving on the weft separating path D ', the speed change motor 31 is rotating at a low speed, and the weft separating member 9
0 slowly scrapes the cloth W1 to surely separate the miss yarn Y.

When the weft separating member 53 rotates about the shaft 36 from the position indicated by the solid line in FIG. 4 by an angle θ2 and the miss yarn Y is pulled out between the drive roller 67 and the driven roller 29, the magnet M2 is connected to the proximity switch S3. The speed change motor 31 is operated in the opposite direction, and the motor 31 is switched to high speed rotation. At this time, the air cylinder 55 is operated, and the driven roller 29 is rotated from the retracted position shown by the solid line in FIG. Therefore,
The miss yarn Y drawn out between the rollers 67 and 29 is hooked on the driven roller 29 and is pressed and held between the roller 29 and the driving roller 67. At this time, the motor 69 is operated based on the weft insertion error detection signal, and the drive roller 67 is rotating in the arrow direction shown in FIG. As a result, the miss yarn Y clamped between the rollers 67 and 29 is guided to the suction port 71a side of the suction pipe 71. In this state, as shown in FIG. 6, the head of the screw 59 screwed to the drive rod 55a of the air cylinder 55 is separated from the connecting shaft 58, and the driven roller 29 is driven by the pressing spring 61. Being pressed against. This pressure contact force can be appropriately changed by adjusting the screwing position of the nut 60. At the time when the miss yarn Y is clamped between the rollers 67, 29, the suction device (not shown) connected to the suction pipe 71 is in operation, and both rollers 67, 29 are operated.
The miss yarn Y guided from between 9 to the suction port 71a side is
As shown in the figure, suction is introduced into the suction pipe 71. Therefore, the miss yarn Y separated from the cloth fell W1 into the warp shed by the weft drawing device 33 and the weft separating device 34.
Are sequentially drawn out from the inside of the warp opening to the outside of the warp opening by the cooperation of the rotation pulling action of both rollers 67 and 29 and the suction action of the suction pipe 71, and are sucked and removed into the suction pipe 71.

The weft drawing device 33 is operated by the reverse rotation of the speed change motor 31.
On the side, while the weft separating member 53 is rotationally arranged outside the warp shed, the separating member 53 and the bifurcated arm 39 are integrally formed at a high speed counterclockwise around the shaft 36. The weft separating member 53 is rotated and moved along the return path C3 shown in FIG. When the weft separating member 53 reaches the position shown by the solid line in FIG. 6, the balance weight 42 contacts the second stopper, and the rotation of the bifurcated arm 39 is stopped. Thereafter, similarly to the above, the weft separating member 53 side overcomes the friction torque between the brake linings 46 and 48 and rotates with respect to the bifurcated arm 39, and along the return path C4 shown in FIG. Return to the retracted position shown. By this return, the magnet M2 faces the proximity switch S2, and the operation of the transmission motor 31 is stopped.

On the other hand, on the weft separating device 34 side, as shown in FIG. 8, the weft separating member 90 entering the warp opening is integrally formed with the bifurcated arm 76 along the weft separating paths D'and D to open the warp opening. The weft separating device 53 on the side of the weft drawing device 33 returns to the retracted position shown in FIG. 7 when the weft separating device 53 on the side of the weft drawing device 33 returns to the retracted position.

When the weft separating member 53 and the weft separating member 90 return to the retracted positions and all the miss yarns Y are sucked and removed into the suction pipe 71, the operation of the motor 69 and the suction device connected to the suction pipe 71 is stopped. At the same time, the drive rod 55a of the air cylinder 55 returns to its original position.

After that, the machine base is automatically reversed by a predetermined amount, stopped at the rotation position most suitable for restarting, and the operation of the loom is restarted.

As described above, in this embodiment, the weft separating member 53 that separates and pulls out the miss yarn Y by controlling the rotation speed of the transmission motor 31.
And the moving speed of the weft separating member 90 for separating the miss yarn Y is switched to a low speed when shifting to the paths C1 ', D'which are directly related to the miss yarn Y, and at a predetermined time after the miss yarn Y is separated, That is, since the low speed is switched to the high speed after a part of the miss yarn Y is pulled out from the inside of the warp yarn to the outside of the warp yarn opening, the separation process of the miss yarn Y is shortened while surely separating the miss yarn Y. Can be completed in time,
It is possible to avoid obstruction of productivity improvement required for a high-speed loom such as a jet loom.

In both of the weft pulling device 33 and the weft separating device 34, the presence of the balance weights 42 and 78 allows the bifurcated arms 39 and 76 to smoothly rotate at a high speed, and, for example, as shown in FIGS. Bifurcated arm 3
Even when 9, 78 are arranged in a horizontal state, the rotational moment exceeds the frictional force between the brake linings 46, 48 and 85, 87 to rotate the weft separating member 53 and the weft separating member 90. There is no fear of doing it.

The present invention is of course not limited to the above-mentioned embodiment, but the embodiment shown in FIG. 12 is also possible. In this embodiment, both long and short drive shafts 91 and 92 are used,
The short drive shaft 92 is rotatably supported by a pair of suspension brackets 28 on the weft insertion main nozzle 21 side,
Transmission motor 31A mounted and supported on the support bracket 26
Is operatively connected to. The rotational drive force of the drive shaft 92 is transmitted only to the weft drawing device 33 side, and the weft separating member 5
The miss yarn separation and pull-out action of 3 are performed. On the other hand, the long drive shaft 91 has the same shape as the support bracket 25 as in the previous embodiment.
It is operatively connected to the speed change motor 31 mounted and supported on the side, and the rotational driving force of the coaxial 91 is transmitted only to the plurality of weft separating devices 33 side, and the miss yarn separating action of the weft separating member 90 is performed. That is, in the present embodiment, the shift motors 31, 3 are
By controlling the rotation speed of 1A independently,
The switching timing of the moving speeds of the weft separating members 53 and 90 can be set separately and optimally.

Further, in the above-described embodiment, the rotation of the weft separating member 53 with respect to the bifurcated arm 39 on the side of the weft drawing device 33 is also used for the weft separating action, and the diameter of the timing pulley 43 is made larger than that of the timing pulley 40. The moving speed of the weft separating member 53 can be switched from high speed to low speed.

Further, in the above embodiment, it is possible to control the switching of the rotation speed of the variable speed motor based on a preset program.

INDUSTRIAL APPLICABILITY The present invention is applied not only to the processing of miss yarns but also to the case where the weft yarns inserted during the inertial operation immediately before the artificial machine stand is separated from the woven fabric, and the weft yarn separating device according to the change of the weft width. The number of installed 34 is increased or decreased as appropriate, or the present invention is embodied in a loom that blocks the weft insertion of a weft that is about to be inserted following a miss yarn during machine frame inertia operation in front of the weft insertion device, or a jet loom. The present invention is applied to a shuttleless loom other than the above, and further, the present invention is applied to a moving type weft processing apparatus such as the conventional apparatus disclosed in Japanese Patent Laid-Open No. 58-220856. It is also possible to apply the present invention to a weft yarn processing device that only performs the miss yarn separating action like the finger of No. 2. In this case, it is more effective to control the moving speed of the miss yarn drawing member composed of the receiving body and the pressing body of the conventional device to be a high speed outside the warp opening and a low speed when engaging with the warp.

EFFECTS OF THE INVENTION As described in detail above, the weft processing method of the present invention has an excellent effect that the miss yarn can be separated from the woven fabric in a short time while surely separating the miss yarn.

[Brief description of drawings]

1 to 11 show an embodiment embodying the present invention. FIG. 1 is a front sectional view showing a weft drawing device and a weft separating device, FIG. 2 is a schematic plan view, and FIG. 3 is a weft drawing device. 4 to 6 are side sectional views of the weft separating device, FIG. 7 is a side sectional view of the weft separating device, and FIG. 8 is a weft separating action. FIG. 9 to FIG. 11 are side sectional views showing a conventional device, FIG. 12 is a schematic plan view showing another example of the present invention, and FIG. . Support rail 27, drive shafts 30, 91, 92, speed change motors 31, 31A, weft pulling-out device 33 and weft separating device 34, which form a weft processing device, weft separating members 53, 9
0, warp yarns T1, T2, miss yarn Y, weft separating path C1 ',
D '.

Claims (1)

[Claims] 1. A weft yarn processing device for forming a warp yarn open state, releasing the weaving state of the weft yarn woven into the woven fabric immediately before the machine stand is stopped, and performing the separation process of the weft yarn near the upper part of the weave. When the separating member is moved from the predetermined retracted position along the weft separating path that scrapes the weaving cloth, the moving speed of the weft separating member is switched from a high speed to a low speed in the vicinity of the cloth fell of the weft separating path. A weft processing method in a shuttleless loom in which the weft is separated from the cloth fell into the warp shed by the low speed movement, and then the moving speed of the weft separating member is switched to a high speed to return to the retracted position.