JPH0527510Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a shuttleless loom having a structure in which the weaving machine is tucked in every multiple weaving cycles.

Prior Art When weaving a pile structure using this type of shuttleless loom, the advancing position of the reed is different during pile forming reed beating and blind reed beating due to terry motion, so it cannot be synchronized with the warp. A catch cord that operates to open and close the weft is placed in parallel on the outside of the warp threads at a required interval so as to pass from the back crawler side through the reed, the weft end holder of the tuck-in selvedge assembly device, and the outside of the cutter. Therefore, a plurality of weft yarns are held together until they are gripped by the weft end holder of the tuck-in selvedge assembly device.

Problems to be Solved by the Invention Due to the difference in the advancing position of the reed due to terry motion, the load on the catch cord changes greatly, and the catch cord breaks or becomes slack due to the change in tension. In particular, when the catch cord is slack, weft threads flying due to the jet flow of the weft insertion nozzle come into contact with the catch cord, which tends to cause weft insertion errors. If this weft insertion error or cable breakage occurs, the shuttleless loom must be stopped and repaired, which requires a great deal of labor and time.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a clamping surface portion of a plate-shaped fixed clamping body on the outside of the weft end holder and the cutter of the tuck-in selvedge assembly device. A gripper is provided in which a gripping surface portion of a rotatable plate-shaped movable clamping body is brought into pressure contact with the clamping surface portion of a linear spring having one end fixed and the other end of the linear spring fixed to the movable clamping body. The press-contact portion between the pair of clamping surfaces is disposed astride between the blind reed beating position and the pile forming reed beating position, and the plurality of weft yarns to be reeded over the plurality of weaving cycles are connected to the pair of wefts. It is configured to be held between the holding surfaces.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 to 4, the shuttleless loom of this embodiment generally includes a reed 1, a weft insertion nozzle 2, a regular weft insertion cutter 3, a tuck-in selvedge assembly device 4, and a gripper 5.

Here, the reed 1 is connected to the warp 6 by a reed beating mechanism (not shown).
It is designed to reciprocate in the direction of extension. Reed 1
The forward positions of the pile forming reeding position A and the blind reeding position B are determined by the terry motion. An interference prevention hole 7 is formed in a portion of the reed 1 corresponding to the gripper 5. This interference prevention hole 7 is illustrated in the structure in which the shuttleless loom in this embodiment weaves a single-width woven fabric 8, and the gripper 5 and tuck-in selvedge assembly device 4 are located opposite to the weft insertion side. Since the reed is separated into the weft inserting side and
It is provided on the weft insertion side and the opposite weft insertion side.

The weft inserting nozzle 2 is disposed on the weft inserting side of the reed 1 on the weaving front 9 side of the reed 1, and is configured to move back and forth together with the reed 1, so that the reed 1 is moved to the retracted position at each weaving cycle. When the weft is at position C and the warp shedding is at its maximum, the weft 10 is caused to fly toward the side opposite to weft insertion by means of a fluid jet, and the weft is inserted. The weft 10 inserted by the weft insertion nozzle 2 is stopped from flying by a weft length measuring mechanism (not shown) attached to the loom body outside the weft insertion nozzle 2.
The flying tip of the weft yarn 10 in this state where the flying is stopped (weft insertion is completed) is located outside the interference prevention hole 7 on the side opposite to the weft insertion of the reed 1, as shown in FIG.

The regular weft insertion cutter 3 moves back and forth together with the reed 1, and is moved by an actuator (not shown) between a scissors cutting position and a retracted position that does not interfere with weft insertion. When retreating in step 1, move from the shelter position to the scissor cutting position,
The weft yarn 10 that has been beaten is cut in each weaving cycle. The cut portion of the weft yarn 10 is located between the weft insertion nozzle 2 and the interference prevention hole 7 on the weft insertion side of the reed 1.
It is located between.

The tuck-in selvedge device 4 is symmetrical on the weft insertion side and the anti-weft insertion side when viewed in the weft insertion direction, but has substantially the same structure.
2 to an operating position shown by an imaginary line in FIG. 2, via an intermediate position shown by a dashed line in FIG. 2, and at the required timing, so that a plurality of wefts 15 stretched between the gripper 5 and the weaving selvedge 14 are cut by the cutter, and at the same time, the cut ends are gripped by the weft end holder 12. Thereafter, the ends of the plurality of wefts 15 stretched between the weft end holder 12 and the weaving selvedge 14 are captured by the tuck-in needle 11, folded back, and inserted into the warp shed.

The gripper 5 grips a plurality of weft yarns 15 that are beaten over a plurality of weaving cycles, and is used as a gripper 13 in the tuck-in selvedge assembly device 4.
and the weft end holder 12.
The gripper 5 in this embodiment, as shown in FIG.
1 toward the fixed clamping body 20 to press the clamping surface portion 23 of the movable clamping body 21 against the clamping surface portion 22 of the fixed clamping body 20. The fixed clamping body 20 is fixed to a bracket 26 attached to the loom main body, and the movable clamping body 21 is connected to the bracket 26 by a pin 27. Although the two holding surfaces 22 and 23 are arranged astride the pile forming reed beating position A and the blind reed beating position B as shown in FIG. It is not placed in areas where it can face each other. Both the clamping surfaces 22 and 23 are configured to have an uneven shape that extends parallel to the direction in which the warp threads 6 extend and fit into each other, and their ends on the reed side become arcuate guide surfaces 28 and 29 that are separated from each other. There is. Fixed clamping body 20
A yarn release groove 30 is formed in the opposite corner of the holding surface 22 on the side opposite to the reed. The spring 24 is moored across the bracket 26 and the movable clamping body 21, and one end is connected to a screw 25a and a nut 25b.
The other end is fixed to the bracket 26 by connecting the bent end 24a to the movable clamping body 21.
is locked by inserting it into the hole 33 of the
A fulcrum member 31 is attached to the intermediate portion. This fulcrum member 31 is attached to the bracket 26.

The operation of the above embodiment will be described, but to simplify the explanation, the explanation will be made on the assumption that pile formation is performed by terry motion every two weaving cycles.

As shown in FIG. 1, in the first weaving cycle when the reed 1 moves back and the warp opening becomes maximum, the weft 1
0 ₁ is inserted, the reed 1 is beaten to the blind beating position B. During this beating process, the weft yarn 10 ₁ remains connected to the weft insertion nozzle 2.
While being pushed by the reed 1, the movable clamping body 21 is pushed open against the spring 24, and enters between the clamping surface part 23 of the movable clamping body 21 and the clamping surface part 22 of the fixed clamping body 20, as shown in FIG. 5A. As shown in the figure, after being gripped by the gripper 5, it is cut by the weft insertion cutter 3. Thereafter, when the reed 1 retreats from the blind reed beating position B, this weft yarn 10 ₁ is gripped by the gripper 5 and left behind. Then, when the reed 1 stops at the retracted position C and the next weaving cycle begins where the warp opening is at its maximum, the next weft 10 ₂ is inserted.
Reed 1 is reeded to blind reeded position B,
Similarly to the above, the weft thread 10 ₂ connected to the weft insertion nozzle 2 is pushed by the reed 1 and is cut by the regular weft insertion cutter 3 while being held by the gripper 5 as shown in FIG. 5B. Then, the reed 1 retreats from the blind reed beating position B, and the weft yarn 10 ₂ is gripped by the gripper 5 and left behind. This gripper 5 grips two weft yarns 10 ₁ and 10 ₂ .

Since this next weaving cycle is a weaving cycle for forming a pile, when the weft yarn 10 ₃ is inserted, the reed 1 is beaten to the pile forming beating position A. Then, as shown in FIG. 5C, the weft yarn 10 ₃ that is still connected to the weft insertion nozzle 2 is pushed by the reed 1 and enters between the two clamping surfaces 22 and 23 to remove the two weft yarns 10 ₁ . , 10 ₂ are moved together from the blind reeding position B to the pile forming reeding position A. At this time, only the pile threads 32 stretched parallel to the warp threads 6 are bent into a loop shape, and the height is 1/2 of the dimension between the blind beating position B and the pile forming beating position A. A pile is formed. Then, the third weft 10 ₃ gripped by the gripper 5 at the pile forming reed beating position A is cut by the weft insertion cutter 3, the reed 1 is moved back, and the three weft yarns 10 ₁ to 10 ₃ are gripped by the gripper 5. being grabbed and left behind. As the reed moves backward, the tuck-in needle 11, weft end holder 12, and cutter 3 of the tuck-in selvedge assembly device 4 move from the retracted position to the operating position as shown in FIG. 5D, and the three Weft 10 ₁ ~ 1
0 ₃ is cut with a cutter 13, simultaneously held with a weft end holder 12, and tucked in together with a tuck-in needle 11. This completes one cycle of pile formation by terry motion. The waste threads 10 ₁₁ , 10 ₂ left behind in the gripper 5 at the end of one cycle of pile formation
₁ , 10 ₃₁ is gripped by the gripper 5 during the subsequent pile forming cycle, and is pushed from the reed side toward the opposite reed side by the incoming weft yarn 10, and is used for yarn escape from between the two clamping surfaces 22 and 23. The yarn is transferred into the groove 30, and due to the movement into the yarn release groove 30, the 2
The grip by the two gripping surfaces 22 and 23 is released,
It is discharged outside the gripper 5.

Effects of the Invention As described above, according to the present invention, in a shuttleless loom that tucks in a plurality of weft yarns at once for each multiple weaving cycle, the plurality of weft yarns are transferred to the weft end holder of the tuck-in selvedge assembly device. It is possible to omit the catch cord, which can cause instability such as weft insertion errors and catch cord breakage, without causing problems in gripping the weft threads by holding them all together until the weft is gripped by the handle. This eliminates the waste of the catch cord, which is just a waste of time, and improves the operating rate of the waste shuttle loom. In addition, by combining the gripper itself with a plate-shaped fixed clamping body, a movable clamping body, and a linear spring, the gripper can be made thinner by reducing its width in the weft insertion direction. The yield can be improved by shortening the length.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention;
Figure 2 is an enlarged view of the arrowed part shown in Figure 1;
The figure is a side view showing the gripper of the same embodiment, FIG. 4 is a front view showing the gripper of the same embodiment seen from the reed side,
FIGS. 5A to 5D are explanatory diagrams of the operation of the present invention. 1... Reed, 4... Tatsuin ear assembly device, 5...
Gritspa, 10, 10 ₁ , 10 ₂ , 10 ₃ ...weft,
12...Weft end holder, 13...Katsuta, 20...
...Fixed clamping body, 21...Movable clamping body, 22, 23
...Holding surface portion, 24...Spring, A...Pile forming reeding position, B...Blind reeding position.

Claims (1)

[Scope of Claim for Utility Model Registration] In a shuttleless loom that tucks in every multiple weaving cycles, a clamping surface portion of a plate-shaped fixed clamping body and a rotation A gripper is provided in which a clamping surface portion of a movable plate-shaped movable clamping body is pressed against the clamping surface portion of a linear spring having one end fixed and the other end of the movable clamping body being locked to the movable clamping body; A press-contact portion between the clamping surfaces of the pair is arranged to straddle between a blind reeding position and a pile forming reeding position, and the plurality of weft yarns to be reeded over the plurality of weaving cycles are held between the pair of clamping parts. A shuttleless loom characterized by gripping between face parts.