JPH09137338A - Weft-insertion method for rapier loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the labor for changing the weaving width of a rapier loom. SOLUTION: The weaving width of fabric is changed by stationarily keeping the position of the fabric edge of the weft insertion starting side. The position of weft delivery from the feeding rapier head 11 to the receiving rapier head 12, i.e., the meeting position of both rapier heads 11, 12 and the retreating positions of both rapier heads are unchanged. The position of a trimmed selvage forming apparatus 67 at the weft insertion end is varied according to the change of the position of a woven fabric edge of the weft insertion end. The position of an electromagnet 32 for releasing a weft from the receiving rapier head 12 is changed according to the change of the position of the woven fabric edge of the weft-insertion end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention inserts a delivery rapier head and a receiving rapier head into a warp shed, transfers the weft from the delivery rapier head to the receiving rapier head, and then retracts both rapier heads from the warp shed. The present invention relates to a weft inserting method for a rapier loom to be put.

[0002]

2. Description of the Related Art In a conventional rapier loom of this type, a weft delivery position for delivering a weft from a delivery rapier head to a reception rapier head remains unchanged regardless of a change in the width of a woven fabric. The weft delivery position, that is, the encounter position between the delivery rapier head and the reception rapier head is set near the center of the left and right of the loom. When the weaving width is changed, the retracting positions of the delivering rapier head and the receiving rapier head are equally changed so that the strokes of both rapier heads are equalized.

[0003]

Generally, in a rapier loom, weft insertion of plural kinds of wefts, that is, multicolor weft insertion is performed, and the wefts are selectively arranged from a standby position to a weft insertion position by a selection lever. The delivery rapier head catches the weft threads that are selectively placed in the weft insertion position and inserts the wefts, but if the retracting position of the delivery rapier head is changed according to the change in the weaving width, the catch position must also be changed. . In order to change the catch position, it is necessary to change the selection lever mechanism, a cutter mechanism for cutting the weft yarn for each weft insertion, the temple device on the weft insertion start end side, or the installation position of the weaving functional parts such as the selvedge forming device. . Considering that it is necessary to change the installation position of the weaving functional parts such as the temple device for weaving shrinkage prevention on the weft inserting end side or the selvedge forming device, the weaving width direction is adjusted according to the position of the end of the woven fabric. The work of changing the installation position of the weaving functional component for changing the weaving width, which requires the setting of the installation position of, requires a lot of labor.

An object of the present invention is to reduce the time and effort required for changing the width of a rapier loom.

[0005]

To this end, according to the invention of claim 1, when changing the weaving width of the woven fabric, the weaving width is changed without changing the position of the woven fabric end portion on the weft insertion start end side, and the weaving width is changed from the delivery rapier head. The weft handing position to the receiving rapier head and the retracted positions of both rapier heads are unchanged.

According to the second aspect of the present invention, when changing the weaving width of the woven fabric, the weft width is changed by changing the position of the woven fabric end portion on the weft insertion start end side, and changing the weaving width from the delivering rapier head to the receiving rapier head. Is the center of the weaving width of the woven fabric after changing the weaving width, the retracting positions of the delivering rapier heads are not changed, and the retracting positions of the receiving rapier heads are changed so that the strokes of both rapier heads are equal.

According to the third aspect of the present invention, when changing the weaving width of the woven cloth, the weft width is changed by changing the position of the woven cloth end on the weft insertion start end side, and changing the weaving width from the passing rapier head to the receiving rapier head. In addition, the retracted position of the receiving rapier head is changed according to the change of the weaving width.

According to the fourth aspect of the present invention, among the weaving functional parts that need to be set in the weft width direction in accordance with the positions of the end portions of the woven cloth, the weaving function parts on the weft inserting end side are located in the weaving width direction. The installation position of was changed according to the change of weaving width.

According to the inventions of claims 1 and 4, the position of the woven fabric end portion on the weft insertion end side is changed according to the change of the weaving width, and the position of the woven fabric end portion on the weft insertion start end side is changed. Not done. Along with the change in the position of the woven cloth end portion on the weft insertion end side, the installation position of the weaving functional parts such as the throw-back forming device and the temple device on the weft insertion end side is changed. Since the retracting position of the delivery rapier head and the receiving rapier head, the weft delivery position between the two rapier heads, the weft insertion start end side side end forming device, and the installation position of the weaving functional parts such as the temple device are not changed, it is necessary to change the weaving width. The time and effort required for the work are significantly reduced as compared to the past.

According to the inventions of claims 2 and 4, the position of the woven fabric end portion on the weft insertion end side is changed according to the change of the weaving width, and the position of the woven fabric end portion on the weft insertion start end side is changed. Not done. Along with the change in the position of the woven cloth end on the weft inserting end side, the installation position of the weaving functional parts such as the weft insertion end forming device and the temple device is changed, and the retracting position of the receiving rapier head and both The weft passing position between the rapier heads is changed. Since the installation positions of the weaving functional parts such as the throw-off forming device and the temple device on the weft insertion start end side are not changed, the work for changing the weaving width is reduced as compared with the conventional case.

According to the inventions of claims 3 and 4, the position of the woven fabric end portion on the weft insertion end side is changed according to the change of the weaving width, and the position of the woven fabric end portion on the weft insertion start end side is changed. Not done. Along with the change in the position of the woven fabric end on the weft inserting end side, the installation position of the weaving functional parts such as the weft forming device and the temple device on the weft inserting end side is changed, and the retracted position of the receiving rapier head is also changed. However, the weft delivery position between both rapier heads is not changed. Since the installation positions of the weaving functional parts such as the throw-off forming device and the temple device on the weft insertion start end side are not changed, the work for changing the weaving width is reduced as compared with the conventional case.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to FIGS.

Reference numeral 11 denotes a delivery rapier head that is inserted into the opening of a warp (not shown) from the weft insertion start end side.
2 is a receiving rapier head which is inserted into the warp opening from the weft inserting end side. Delivery rapier head 11,
Reference numeral 12 is fixed to the tips of the rapier bands 13 and 14, and the rapier bands 13 and 14 are wound around and coupled to rapier wheels 15 and 16 which reciprocally rotate in opposite directions. The delivery rapier head 11 is the rapier wheel 1
5 is inserted into the warp opening by the forward rotation, and the returning rapier head 11 is retracted from the warp opening by the backward rotation of the rapier wheel 15. The receiving rapier head 12 is inserted into the warp opening by the forward rotation of the rapier wheel 16, and retracts from the warp opening by the backward rotation of the rapier wheel 16.

The sled 27 is supported on the swing shaft 43. The sley 27 rotates integrally with the swing shaft 43 about the swing shaft 43. A drive shaft 44 is rotatably arranged immediately below the swing shaft 43. The drive shaft 44 is parallel to the swing shaft 43. A driven gear 45 is fixed to the drive shaft 44. A servo motor 46 is installed near the drive shaft 44. The drive gear 461 of the servo motor 46 meshes with the driven gear 45, and the rotation of the servo motor 46 causes the rotation of the drive shaft 44 via the drive gear 461 and the driven gear 45.
Is transmitted to The servo motor 46 rotates only in one direction, and the drive shaft 44 rotates only in one direction.

Double cams 47 are provided on both ends of the drive shaft 44.
48 is fixed, and double cam levers 49 and 50 are fixed to both ends of the swing shaft 43. Double cam 4
7, 48 and the double cam levers 49, 50 constitute a positive cam mechanism, and rotation of the drive shaft 44 in one direction is converted into reciprocating rotation of the swing shaft 43 via the positive cam mechanism. Swing axis 4
The reciprocating rotation of 3 causes the sley 27 to reciprocate back and forth, and the reed 26 performs a beating operation.

At both ends of the drive shaft 44, oblique shaft cranks 51,
52 is fixed. Bifurcated intermediate links 53 and 54 are rotatably connected to the oblique shaft cranks 51 and 52. Base shafts 55 and 56 are supported by the intermediate links 53 and 54 so as to be relatively rotatable. The base shafts 55 and 56 are the support shafts 55.
1, 561 can be rotated, and segment gears 57, 58 are rotatably supported at intermediate portions of the base shafts 55, 56. Oblique cranks 51, 52, intermediate link 5
3, 54, base shafts 55, 56, support shafts 551, 561 and segment gears 57, 58 are three-dimensional crank mechanisms 59, 6
0.

The segment gears 57 and 58 are driven gears 61 on the support shafts 151 and 161 of the rapier wheels 15 and 16, respectively.
It meshes with 62. Rotation of the drive shaft 44 in one direction is converted into reciprocal rotation of the rapier wheels 15 and 16 via the three-dimensional crank mechanisms 59 and 60 and the driven gears 61 and 62.

The reciprocating rotation of the rapier wheels 15 and 16 is transmitted to the rapier bands 13 and 14, and
14 makes a round trip. The rapier heads 13, 12 enter and exit the warp shed by the reciprocation of the rapier bands 13, 14. The three-dimensional crank mechanisms 59 and 60 are configured symmetrically, and the left and right rapier wheels 15 and 16 rotate in opposite directions. Therefore, both rapier heads 11 and 12 synchronously enter the warp shed and meet at the central portion of the weaving width,
After that, the yarn is retracted from the warp shed. The position shown by the chain line L1 in FIG. 2 shows the meeting position of both rapier heads 11 and 12. The weft Y conveyed into the warp shedding by the delivery rapier head 11 is delivered to the receiving rapier head 12. Then, when the receiving rapier head 12 retreats from the inside of the warp opening, the weft passes through the inside of the warp opening.

As shown in FIGS. 4 and 5, the delivery rapier head 11 is a non-magnetic fixed gripping body 1 for delivery.
7 and the movable movable gripping body 18 made of a magnetic material are combined. A support piece 171, a gripping surface 172, and a position regulating piece 173 are integrally formed on the delivery fixed grip body 17. The movable gripping body 18 for transfer, the tip of the rapier band 13 and the leaf spring 19 are fastened and fixed to the support piece 171 with screws 20. The transferable movable gripping body 18 is made of metal having a spring action, and a gripping surface 181 is formed at the tip of the transferable movable gripping body 18. Both gripping surfaces 172 and 181 can be brought into and out of contact with each other. The position restricting piece 173 restricts the downward movement of the transfer movable gripping body 18.

As shown in FIGS. 4 and 5, the receiving rapier head 12 is a non-magnetic fixed gripping body 2 for receiving.
1 and the movable receiving grip 22 made of a magnetic material are combined. A movable receiving grip 22 is rotatably connected to the fixed receiving grip 21 via a shaft pin 23. The receiving movable gripping piece 22 is made of metal. Gripping surfaces 211 and 221 are formed at the tip ends of the receiving fixed gripping body 21 and the receiving movable gripping body 22 so as to face each other. Both gripping surfaces 211 and 221 can be brought into and out of contact with each other. The rapier band 1 is attached to the receiving fixed grip body 22.
The tip of 4 is fastened and fixed by a screw 24. A support piece 212 and a position regulating piece 213 are integrally formed on the receiving fixed grip body 21. A compression spring 25 is interposed between the support piece 212 and the receiving movable grip piece 22. The position control piece 213 is a movable holding body 22 for receiving.
Regulate downward movement.

The delivery rapier head 11 and the reception rapier head 12 enter into the opening of the warp T by the forward rotation of the rapier wheels 15 and 16, and both rapier heads 1
1, 12 meet in the warp shed. The delivery rapier head 11 and the reception rapier head 12 are retracted from the warp opening by the backward rotation of the rapier wheels 15 and 16. The position of the delivery rapier head 11 in FIG. 1 is the retracted position that is the farthest from the warp shed. The position of the receiving rapier head 12 in FIG. 1 is the retracted position that is the maximum distance from the warp shed. The encounter position of both rapier heads 11 and 12 is set to an intermediate position between the retracted positions of the rapier heads 11 and 12. That is, the strokes of both rapier heads 11 and 12 are equal.

The rapier heads 11 and 12 run on a sley 27 that supports the reed 26. This traveling route, that is, the weft inserting route is a route that does not interfere with the reed 26 that has finally receded from the cloth cloth W. As shown in FIG. 3, a plurality of band guides 28 are fixed to the front surface of the sley 27. The band guide 28 is attached to the sley 2 by tightening the bolt 29 and the nut 30 housed in the mounting groove 271 on the front surface of the sley 27.
It is fixed to the front of 7. The band guide 28 guides the traveling of the rapier bands 13 and 14.

As shown in FIGS. 1 and 2, electromagnets 31 and 32 are installed on the front surfaces of both ends of the sley 27. The installation position of the electromagnet 31 is directly below the weft insertion path of the delivery rapier head 11, and the installation position of the electromagnet 32 is immediately below the weft insertion path of the reception rapier head 12. A pair of electromagnets 33 and 34 are embedded in the central portion of the sley 17. The installation position of the electromagnet 33 is directly below the weft insertion path of the delivery rapier head 11, and the installation position of the electromagnet 34 is immediately below the weft insertion path of the reception rapier head 12. Each of the electromagnets 31 to 34 has a mounting groove 27.
It is fixed to the front surface of the sley 27 by tightening the bolt 35 and the nut 36 housed in No. 1.

The magnetic field of the electromagnet 31 is near the retracting position of the delivery rapier head 11, and the magnetic field of the electromagnet 32 is near the retracting position of the receiving rapier head 12. The magnetic field of the electromagnet 33 acts on the position where the delivery rapier head 11 meets the reception rapier head 12, that is, near the weft insertion dead center position of the delivery rapier head 11. The action area of the magnetic force of the electromagnet 34 is
It is a position where the receiving rapier head 12 meets the delivering rapier head 11, that is, near the weft-insertion dead center position of the receiving rapier head 12. The magnetic force of the electromagnet 31 acts on the transferable movable gripping body 18 of the transfer rapier head 11 located near the retracted position. The magnetic force of the electromagnet 33 acts on the delivery movable gripping body 8 of the delivery rapier head 11 located near the weft insertion dead center position. The magnetic force of the electromagnet 32 acts on the receiving movable gripping body 12 of the receiving rapier head 12 near the retracted dead center position. The magnetic force of the electromagnet 34 is the receiving rapier head 1 located near the weft insertion dead center position.
It acts on the receiving movable gripping body 22 of No. 2.

The movable gripping body 18 for transfer which has been subjected to the magnetic force of the electromagnets 31, 33 has its own spring action and the leaf spring 1.
The support piece 17 is moved to the electromagnets 31 and 33 side against the spring action of 9.
The curve is displaced with 1 as a fulcrum. Due to this curved displacement, the transferable movable gripper 18 is switched from the weft grip position shown in FIG. 4 to the weft release position shown in FIG. The downward movement of the movable gripping body 18 for transfer is restricted by the position restricting piece 173. In this restricted state, the transferable movable gripping body 18 comes very close to the electromagnets 31, 33. However, the warp T is not strongly sandwiched between the transferable movable gripping body 18 and the electromagnets 31 and 33, and the warp is not damaged.

The receiving movable gripping body 22, which receives the action of the magnetic force of the electromagnets 32 and 34, is rotationally displaced about the shaft pin 23 toward the electromagnets 32 and 34 side against the spring action of the compression spring 25. Due to this rotational displacement, the receiving movable gripper 22 is switched from the weft grip position shown in FIG. 4 to the weft release position shown in FIG. The downward movement of the receiving movable gripping body 22 is regulated by the position regulating piece 213. In this regulated state, the receiving movable gripping body 22 comes very close to the electromagnets 32 and 34. However, the warp yarn T is received by the movable gripping body 2 for receiving.
It is not strongly sandwiched between the 2 and the electromagnets 32 and 34, and the warp T is not damaged.

As shown in FIG. 1, the electromagnets 31 to 34 are controlled by the control computer C via the drive circuits 37, 38, 39 and 40. The drive circuits 37-40 apply the voltage V to the electromagnets 31-34. Control computer C
A voltage application timing setting device 41 and a rotary encoder 42 are connected to the. The voltage application timing setting device 41 inputs and sets the application timing of the voltage applied to the electromagnets 31 to 34 to the control computer C. The rotary encoder 42 detects the rotation angle of the loom. The control computer C commands the drive circuits 37 to 40 to apply the voltage V at a preset timing based on the loom rotation angle information obtained from the rotary encoder 42. The drive circuits 37 to 40 apply the voltage V to the electromagnets 31 to 34 at the set application timing.

The waveform D1 in FIG. 8 shows an example of the value of the voltage applied to the electromagnet 31 and the application timing, and the waveform D2 shows an example of the value of the voltage applied to the electromagnet 32 and the application timing. The waveform E1 shows an example of the value of the voltage applied to the electromagnet 33 and the application timing, and the waveform E2 shows an example of the value of the voltage applied to the electromagnet 34 and the application timing. The horizontal axis θ represents the rotation angle of the loom, and the vertical axis represents the voltage. The voltage of each waveform D1, D2, E1, E2 is V.
The application time Td1, Td2, Te1, Te2 of the voltage V is input to the control computer C by the voltage application timing setting device 41. The control computer C commands the drive circuits 37 to 40 to apply a voltage based on the loom rotation angle information obtained from the rotary encoder 42 and the information on the set application times Td1, Td2, Te1, Te2. The drive circuits 37-40 apply the voltage V to the electromagnets 31-34 based on this voltage application command.

The transferable movable gripping body 18 is switched from the weft gripping position to the weft release position by applying the voltage indicated by the waveform D1. The delivery rapier head 11 starts weft insertion with the movable transfer gripping body 18 arranged at the weft release position, and the movable transfer gripping body 18 is switched from the weft release position to the weft grip position near the retracted position. With this switching arrangement, the weft yarn Y is gripped between the gripping surfaces 172, 181 of both gripping bodies 17, 18. The delivery rapier head 11 catches the weft Y at the weft catch position near the retracted position and inserts the weft.

As shown in FIG. 4, the receiving rapier head 12 arrives at the weft-insertion dead center position before the delivering rapier head 11. The movable gripper 22 of the receiving rapier head 12 that has arrived at the weft insertion dead center position is switched from the weft grip position to the weft release position by applying the voltage indicated by the waveform E2. The receiving rapier head 12 waits for the arrival of the delivering rapier head 11 with the receiving movable gripping body 22 arranged in the weft releasing position. The weft Y, which is gripped by the delivery rapier head 11 that has arrived at the weft insertion dead point position, is on both gripping surfaces 2 of the reception rapier head 12.
Enter between 11 and 221. The weft Y has two gripping surfaces 211,
When entering between 221, the voltage application to the electromagnet 34 is stopped and the receiving movable gripper 22 is switched from the weft release position to the weft grip position. With this switching arrangement, the weft Y is gripped between the two gripping surfaces 211, 221 of the receiving rapier head 12 as shown in FIG. The movable gripper 18 of the delivery rapier head 11 that has arrived at the weft insertion dead center position is switched from the weft grip position to the weft release position by applying the voltage indicated by the waveform E1. With this switching arrangement, the weft Y is released from the gripping action of the delivery rapier head 11.

After that, both the rapier heads 11 and 12 retract toward the retracted position, and the receiving rapier head 1
The weft yarn Y gripped by 2 is passed through the opening of the warp yarn. The movable gripping body 22 of the receiving rapier head 12, which has reached the weft release position immediately before the retracted position, is switched from the weft grip position to the weft release position by applying the voltage indicated by the waveform D2. By this switching arrangement, the weft yarn Y is released from the gripping action of the receiving rapier head 12. After that, reed 26
Starts beating operation from the last retracted position.

As shown in FIG. 2, a pair of temples 64 and 65 for preventing weaving shrinkage are supported on a temple bar 63 arranged in the weft width direction of the woven cloth W. The left and right temples 64, 65 can both be mounted at positions adjustable in the longitudinal direction of the temple bar 63.

As shown in FIGS. 1 and 3, a pair of throw-away ear forming devices 66 and 67 are arranged behind the reed 26. The throw-away ear forming device 67 includes a pair of heald frames 68, 69 and a heald frame 6
The belt 70 suspends the belts 8 and 69, the motor 71 that reciprocates the belt 70, and the tension spring 72 that biases the heald frames 68 and 69 downward. By the reciprocating rotation of the motor 71, the heddle frames 68, 69 alternately move up and down, and the warp yarn Te for throwing through the heddle frames 68, 69 forms an opening. The throw-away ear forming device 66 has the same configuration. The left and right throwing-edge forming devices 66, 67 can be installed at different positions in the width direction of the woven cloth W.

In FIG. 2, the width of the row of warp yarns T sent out from the warp beam 73 is maximum, and the weave width H of the woven fabric W is
1 is the maximum. The right side of the warp beam 73, that is, the position of the flange 731 on the weft insertion end side can be changed. When the weave width H1 of the woven cloth W is changed to the weave width H2 as shown in FIG. 7, the position of the flange 731 is changed. or,
In accordance with the change of the weaving width of the woven cloth W, the installation positions of the end ear forming device 67 and the temple 65 on the weft inserting end side are changed according to the change of the position of the end portion W1 of the woven cloth W on the weft inserting end side. .
However, the retracted positions of the delivery rapier head 11 and the reception rapier head 12 and both the rapier heads 11, 1
The encounter position L1 of 2 is not changed.

The retracted position and the encounter position L1 of both rapier heads 11 and 12 are not changed, but the voltage application timing to the electromagnet 32 is changed as shown by the waveform D3 in FIG. The voltage application time is the same as before. Such a change of the voltage application timing can be easily performed by operating the voltage application timing setting device 41. With such a change in the voltage application timing, the receiving rapier head 12 holding the weft Y releases the weft Y immediately after retracting from the warp shed. The tip portion of the weft yarn Y released from the receiving rapier head 12 is gripped by the throw-away warp yarn Te passed through the throw-away yarn forming device 67.

In this embodiment, as the position of the woven fabric end portion W1 on the weft insertion end side is changed, the installation positions of the throwing edge forming device 67 and the temple 65 on the weft insertion end side are changed. However, the retracted positions of the two rapier heads 11 and 12, the weft handing position between the two rapier heads 11 and 12 (that is, the encounter position L1), the throwing edge forming device 66 on the weft insertion start end side, and the temple 6
Since the installation position of No. 4 is not changed, the labor for changing the weaving width is remarkably reduced as compared with the conventional case.

The structure in which the movable grippers 18, 22 are positively moved by magnetic force facilitates the setting of the optimum opening / closing timing of the rapier heads 11, 12 and the setting of the optimum timing for gripping and releasing the weft Y. The ease of setting the optimum timing for gripping and releasing the weft Y ensures the reliable catch of the weft Y by the delivery rapier head 11 and the reliable delivery of the weft from the delivery rapier head 11 to the reception rapier head 12.

Electromagnets 31 to 3 that bring about such effects
In No. 4, the mounting position in the longitudinal direction of the sley 27 can be easily changed, and the labor for changing the weaving width is further reduced.
In addition, the construction in which the retracted position of the delivery rapier head is immovable is another loom in which the end of the weaving cloth on the weft insertion start side is immovable.
For example, warp beam 7 with jet loom and rapier loom
3 can be combined.

Next, a second embodiment shown in FIGS. 10 and 11 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. The movable gripping body 75 of the receiving rapier head 74 in this embodiment is pressed against the tip side of the fixed gripping body 77 by the action of the spring 76, and the weft is gripped at these pressing portions. When the release lever 78 is pushed down, the pressing contact of the movable gripper 75 with the fixed gripper 77 is released, and the weft yarn is released from the receiving rapier head 74. The delivery rapier head (not shown) also has a mechanism similar to that of the release lever 78. FIG. 10B shows the cloth width reduced and changed from the state of FIG. 10A, but the retracting position of the receiving rapier head 74, the retracting position of the delivering rapier head, and the meeting position of both rapier heads are the first. It is not changed as in the embodiment.

As shown in FIGS. 11A and 11B, a release lever 79 is rotatably supported by a support shaft 80, and a motor 81 is attached to the tip of the release lever 79. A roller 811 is fixed to the output shaft of the motor 81. In the weaving state, the roller 811 is continuously rotated leftward in FIG. The peripheral speed of the roller 811 is substantially matched with the retracting speed of the receiving rapier head 12.
The release lever 79 is interlocked with the cam lever 82, and the cam lever 82 swings as the cam 83 rotates. FIG.
In FIG. 9A, the roller 811 is the receiving rapier head 74.
The roller 811 does not interfere with the release lever 78 because the roller 811 is retracted from the movement path of the release lever 78 that accompanies traveling. In FIG. 11B, the roller 811 is arranged on the movement path of the release lever 78, and the roller 811 interferes with the release lever 78. Due to this interference, the release lever 78 is pushed down, and the receiving rapier head 74 retracted from the warp opening releases the weft. The cam 83, the cam lever 82, and the release lever 79 can be attached at position adjustments in the weaving width direction.

In this embodiment, with the change of the position of the woven cloth end W1 on the weft insertion end side, the weft insertion end side throw-away forming device (not shown), the temple (not shown), the cam 83, and the cam lever are provided. The installation positions of the release lever 82 and the release lever 79 are changed. However, the retracting positions of the receiving rapier head 74 and the delivering rapier head, the weft delivering position between the two rapier heads, the weft insertion start end side end selvage forming device (not shown),
Since the installation position of the temple (not shown) is not changed, the labor for changing the weaving width is significantly reduced as compared with the conventional case. Further, a roller 81 for pushing down the release lever 78
Since 1 interferes with the release lever 78 at a peripheral speed substantially equal to the retracting speed of the receiving rapier head 12, the impact at the time of this interference is mitigated and damage to the release lever 78 is avoided.

Next, a third embodiment shown in FIG. 12 will be described. The same reference numerals are attached to the same configuration diagrams as those of the second embodiment. In this embodiment, an air cylinder 84 is attached to the sley 27, and a motor 81 is attached to a drive rod 841 of the air cylinder 84. When the air cylinder 84 is extended, the roller 811 is arranged at the solid line position, and when the air cylinder 84 is reduced, the roller 811 is arranged.
1 is placed at the chain line position. The solid line position of the roller 811 is a position where it does not interfere with the release lever 78 of the receiving rapier head 74 of the second embodiment, and the chain line position of the roller 811 is the receiving rapier head 7 of the second embodiment.
4 is a position where it interferes with the release lever 78 of No. 4.

Also in this embodiment, the same effect as in the second embodiment can be obtained. In addition, in this embodiment, the reed 2
Since it is not necessary to change the width of 6 according to the change of the weaving width, the labor for changing the weaving width is further reduced.

Next, a fourth embodiment shown in FIGS. 13 to 17 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, arms 85 and 86 are fixed to the base shafts 55 and 56, and the segment gear 9
1, 92 are rotatably supported by the support shafts 87, 88. The segment gears 91 and 92 have connection position adjusting holes 91.
1, 921 are formed along the radial direction of the support shafts 551, 561, and the connecting rod 8 is provided between the tips of the arms 85, 86 and the connection position adjusting holes 911, 921.
9, 90 are interposed. The arms 85 and 86 perform the same swing as the segment gears 57 and 58 of the first embodiment, and the segment gears 91 and 92 interlock with the swing of the arms 85 and 86. Therefore, the rapier wheels 15 and 16 reciprocally rotate as in the first embodiment.

13 and 14 show a state in which the weaving width is H1, and FIGS. 15 and 16 show a state in which the weaving width is changed to H2 (<H1). Along with the change of the weaving width, the installation positions of the throw-away ear forming device 67 and the temple 65 on the weft inserting end side are changed, and the retracted position of the receiving rapier head 12 and the meeting positions of the rapier heads 11 and 12 are changed.
Ro in FIGS. 14 and 16 is a delivery rapier head 11
Shows the retracted position. In FIG. 14, R1 indicates the retracted position of the receiving rapier head 12, and L1 indicates both rapier heads 1.
The meeting positions of 1 and 12 are shown. In FIG. 16, R2 indicates the retracted position of the receiving rapier head 12, and L2 indicates the meeting position of both rapier heads 11 and 12. When the amount of movement from the retracted position R1 to the retracted position R2 is d, the encounter position L
The amount of movement from 1 to the encounter position L2 is d / 2.
The change of the retracted position and the encounter position is intended to equalize the strokes of both rapier heads 11 and 12.

The retracting position of the receiving rapier head 12 is changed by rotating the rapier wheel 16 by a necessary amount from the state of FIG. 13 in a state where the segment gear 92 and the driven gear 62 are disengaged. That is, the rotation amount of the circumference of the rapier wheel 16 is set to d. After turning the rapier wheel 16 by a necessary amount, the segment gear 92 and the driven gear 62 may be meshed again. Both rapier heads 1
In order to change the encountering positions of 1 and 12, the retracting position of the receiving rapier head 12 is changed, and then the connecting rods 89 and 9 to the connecting position adjusting holes 911 and 921 are changed.
Change the connection position of 0. In order to reduce the stroke of both rapier heads 11 and 12, the connecting position is set to support shaft 551.
It may be moved away from 561.

It is necessary to change the installation position of the electromagnet 32 according to the change of the retracted position of the receiving rapier head 12, and it is necessary to change the installation position of the electromagnets 33 and 34 according to the change of the meeting position of both rapier heads 11 and 12. Becomes
As the installation positions of the electromagnets 32 to 34 are changed, the electromagnet 32
It is necessary to change the voltage application timing for ~ 34. Waveforms E3 and E4 in FIG. 17 are the electromagnet 3 after changing the cloth width.
The voltage application timing for 3, 34 is shown. Electromagnet 3
It is easy to change the installation positions of 2 to 34 and the voltage application timing. As in the case of the first embodiment, since the retracted position of the delivery rapier head 11, the disposition forming device 66 on the weft insertion start end side, and the installation position of the temple 64 on the weft insertion start end side are not changed, the weaving width is changed. The labor of work is significantly reduced compared to the past. Further, a method of changing the retracted position of the receiving rapier head 12 and the encountering position of both rapier heads 11 and 12 so that the strokes of both rapier heads 11 and 12 are always the same is as follows.
6 provides the same amount of reciprocal rotation and reciprocal synchronization. The discrepancy of the load fluctuations at both ends of the drive shaft 44 impedes the good controllability of the servo motor 46.
The drive shaft 44 has the same reciprocal rotation amount of 5 and 16 and reciprocal synchronization.
The load fluctuations at both ends of are equalized.

Next, a fifth embodiment shown in FIGS. 18 and 19 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, the worm wheel 9 is attached to the support shafts 151 and 161 of the rapier wheels 15 and 16.
3, 94 are fixed, and worms 951, 961 fixed to the output shafts of the servomotors 95, 96 mesh with the worm wheel 93. Servo motors 95, 96
The forward and reverse rotations cause the rapier wheels 15 and 16 to reciprocally rotate. The servomotors 95 and 96 are controlled by the rotation control computer C1. The rotation control information of the servomotors 95 and 96 is input to the rotation control computer C1 by the input device 97, and the rotation control computer C1 outputs the servomotor 95 based on the rotation control information and the loom rotation angle information obtained from the rotary encoder 42. , 9
6 is controlled.

FIG. 19 shows a state in which the weaving width is changed from the state shown in FIG. With the change of the cloth width, the retracted position of the receiving rapier head 12, both rapier heads 11, 12
The encounter position, the installation position of the electromagnets 32 to 34, and the voltage application timing to the electromagnets 32 to 34 are changed as in the fourth embodiment. Receiving rapier head 12
The rotation control information of the servomotors 95 and 96 may be input again by the input device 97 in order to change the retreat position and the meeting position between the rapier heads 11 and 12.

Also in this embodiment, as in the case of the fourth embodiment, the time and effort required for changing the weaving width are remarkably reduced. The configuration in which the rapier wheels 15 and 16 are driven by separate servo motors 95 and 96 is very effective in terms of easiness of changing the retracted position of the receiving rapier head 12 and changing the meeting positions of the rapier heads 11 and 12.

Next, a sixth embodiment shown in FIGS. 20 to 23 will be described. The same components as those in the first and fourth embodiments are designated by the same reference numerals. In this embodiment, the retracted position of the receiving rapier head 12 is changed in accordance with the change of the weaving width, but the encounter position of both rapier heads 11 and 12 is not changed. FIG. 21 shows a state in which the weaving width is changed from the state of FIG. 20. 22, R1 indicates the retracted position of the receiving rapier head 12 in FIG. 21, and R2 indicates the receiving rapier head 1 in FIG.
2 shows the retracted position. L1 is both rapier heads 11 and 12
Indicates the meeting position of. Therefore, the installation position of the electromagnet 32 is changed in accordance with the change of the cloth width, and the voltage application timing to the electromagnet 32 is changed as shown by the waveform D3 in FIG.

In this embodiment as well, since the retracted position of the delivery rapier head 11 is not changed, the labor for changing the weaving width is remarkably reduced as in the first embodiment.

Inventions other than those described in the claims that can be grasped from the above-described embodiment will be described below along with their effects. (1) The weft insertion method in a rapier loom according to any one of claims 1 to 3, wherein the receiving movable gripping body of the receiving rapier head is driven by a magnetic force of an electromagnet.

It becomes easy to change the retracted position of the receiving rapier head and the meeting position of both rapier heads. The effects of the embodiment will be described below. (1) In the embodiment in which the movable gripping body is positively moved by the magnetic force of the electromagnet, it is easy to set the delivery rapier head and the optimal opening / closing timing of the delivery rapier head. (2) In the embodiment in which the roller for pushing down the release lever of the receiving rapier head is driven by the motor, and the roller interferes with the releasing lever at the peripheral speed substantially equal to the retracting speed of the receiving rapier head, the impact at the time of this interference is (3) In the embodiment in which the strokes of both rapier heads are always the same, the same amount of reciprocal rotation of both rapier wheels and reciprocal synchronization are provided, and good controllability of the servo motor is ensured. (4) In the embodiment in which both rapier wheels are driven by separate servo motors, it is very easy to change the retracted position of the receiving rapier head and the meeting position of both rapier heads. (5) In the embodiment in which the retracted position of the delivery rapier head is immovable, the warp beam can be shared by another weaving machine that does not move the woven fabric end on the weft insertion start side, for example, a jet loom and a rapier loom.

[0055]

As described above in detail, in the present invention, at least the retracting position of the delivery rapier head on the weft insertion start end side is fixed regardless of the change of the weaving width. Therefore, the work for changing the weaving width of the rapier loom can be performed. It can reduce the labor.

[Brief description of the drawings]

FIG. 1 is a partially omitted front view showing a first embodiment embodying the present invention.

FIG. 2 is a partially omitted plan view corresponding to FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a front view of a main part for explaining the encounter of both rapier heads.

FIG. 5 is a front view of a main part for explaining the encounter between both rapier heads.

FIG. 6 is a partially omitted front view showing a change in weaving width from FIG. 1.

FIG. 7 is a partially omitted plan view showing a cloth width change from FIG.

FIG. 8 is a timing chart showing voltage application to an electromagnet.

FIG. 9 is a timing chart showing voltage application to the electromagnet after changing the cloth width.

FIG. 10 shows the second embodiment, and FIG. 10A is a partially cutaway front view of a main part. FIG. 7B is a partially cutaway front view showing a change in weaving width from FIG.

11A is a cross-sectional view taken along the line BB of FIG.
FIG. 10B is a sectional view taken along the line CC of FIG.

FIG. 12 is a side sectional view of an essential part showing a third embodiment.

FIG. 13 is a partially omitted front view showing a fourth embodiment.

FIG. 14 is a partially omitted plan view corresponding to FIG.

FIG. 15 is a partially omitted front view showing a change in the weaving width from FIG. 13.

FIG. 16 is a partially omitted plan view showing a change in weaving width from FIG. 14.

FIG. 17 is a timing chart showing voltage application to an electromagnet.

FIG. 18 is a partially omitted front view showing a fifth embodiment.

FIG. 19 is a partially omitted front view showing a cloth width change from FIG. 18.

FIG. 20 is a partially omitted front view showing a sixth embodiment.

FIG. 21 is a partially omitted front view showing the weaving width change from FIG. 20.

22 is a plan view, partly omitted, showing the weaving width change from FIG. 20. FIG.

FIG. 23 is a timing chart showing voltage application to an electromagnet.

[Explanation of symbols]

11 ... Delivery rapier head, 12 ... Reception rapier head, Ro, R1, R2 ... Retreat position, L1, L2 ...
Meeting position.

Claims (4)

[Claims] 1. A rapier loom in which a delivery rapier head and a receiving rapier head are inserted into a warp shed, the weft yarn is delivered from the delivery rapier head to the receiving rapier head, and then both rapier heads are retracted from the warp shed and weft-inserted. When changing the weaving width of the woven fabric, the position of the woven fabric end on the weft insertion start side is unchanged and the weaving width is changed, and the weft delivery position from the delivery rapier head to the receiving rapier head and the retracted positions of both rapier heads are unchanged. Weft insertion method for rapier loom. 2. A rapier loom in which a delivery rapier head and a receiving rapier head are inserted into a warp shed, the weft yarn is transferred from the delivery rapier head to the receiving rapier head, and then both rapier heads are retracted from the warp shed to insert the weft. When changing the weaving width of the woven cloth, change the weaving width by changing the position of the woven cloth end on the weft insertion start side and change the weft passing position from the delivery rapier head to the receiving rapier head. A weft inserting method in a rapier loom in which the withdrawal positions of the delivery rapier heads are set to be centered and the withdrawal positions of the receiving rapier heads are changed so that the strokes of both rapier heads are equalized. 3. A rapier loom in which a delivery rapier head and a receiving rapier head are inserted into a warp shed, the weft yarn is transferred from the delivery rapier head to the receiving rapier head, and then both rapier heads are retracted from the warp shed and weft weaving. When changing the weaving width of the woven fabric, the position of the woven fabric end on the weft insertion start end side is unchanged and the weaving width is changed so that the weft delivery position from the delivery rapier head to the receiving rapier head is unchanged and the receiving rapier head A weft insertion method in a rapier loom in which the retracted position is changed according to the change of the weaving width. 4. The weaving functional component on the weft inserting end side among the weaving functional components that needs to be set in the weft-width-wise mounting position in accordance with the position of the end of the woven fabric. Any one of Claim 1 thru | or 3 changed according to width change
The weft inserting method in the rapier loom according to the item.