JPH0530182U - Cutting machine for shuttleless loom - Google Patents

Abstract

(57) [Summary] [Structure] A guide plate 42 having a guide groove 42a for guiding the weft yarn end portion Q to the repulsion position P is provided on the reverse weft insertion side. Is a movable blade 4 on the side surface of the weft holder 25 in the direction of movement, which swings in conjunction with the beating.
6 and the fixed blade 47 that constitutes the cutter 48 are attached, and the guide plate 42 is further attached to the side surface in the cloth direction with the cutter 4
It is characterized in that a holding leaf spring 50 for elastically holding the weft yarn end Q with the guide plate 42 is provided between several picks before and after cutting the tip of the weft yarn end Q by 8. [Effect] Even after the end of the weft yarn is cut off by the cutter, tension is applied to the weft yarn for a while, and the elasticity of the weft yarn can prevent the looseness of the woven fabric from damaging the ears of the woven fabric.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutter device that cuts off the tip of a weft end located on the cloth fell after beating in a shuttleless loom.

[0002]

[Prior Art]

 Japanese Utility Model Laid-Open No. Sho 63-85684 discloses a shuttleless loom that maintains the tension of the weft-inserted yarn end by utilizing the air flow without using the weft end catching yarn in order to eliminate the need for the conventional throw-through formation. Although there is one disclosed, it is provided with a pipe and an injection nozzle directed to this pipe integrally on the re-entry side, and when the weft-inserted end of the weft passes through the opening of the pipe, the injection is performed. The weft end is guided into the pipe by the air jet of the nozzle, and is maintained in a tension state by the action of this air flow.After that, the weft end that is guided to the cloth fell in this state together with the beating is emptied on the machine base fixed side. It is delivered to the hole by an air flow blown from a nozzle different from the above, completes the beating while maintaining the tension of the weft, and then cuts off the tip of the weft end with a cutter placed close to the weave. Met.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional type, the weft thread may loosen due to its own elasticity immediately after the tip of the weft thread end is cut off by a cutter after beating, and a woven fabric with poor ear tightness may be woven. However, there is a problem in that a yarn having a large elongation tends to show such a tendency and a sufficient ear cannot be formed in practical use.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, in the present invention, in the shuttleless loom in which the weft end is held by the weft holder on the opposite weft insertion side without using the weft end catching yarn and the beating is performed while keeping this holding state, On the entry side, a guide plate is provided to guide the end of the weft thread on the reverse weft entry side to the cloth fell, and this guide plate is located on the side surface of the weft thread holder facing the weft, and has a movable blade that swings in conjunction with beating. Attach the fixed blade that constitutes the cutter with, and further attach the weft end to the guide plate on the side surface in the cloth direction between the guide plate and before and after cutting the end of the weft end by the cutter. It is characterized in that a holding body for elastically holding is provided.

[0005]

[Action]

 When the weft is beaten, the weft end held by the weft end retainer is elastically held between the guide plate and the holding body while being guided to the cloth fell by the guide plate, and then the cloth fell. The tip of the weft yarn end located at is cut with a cutter, and after this cutting, the weft yarn end is kept elastically held between the guide plate and the holding body during several subsequent picks of the beating. Move forward sequentially.

[0006]

【Example】

 Next, a shuttleless loom 2 using the cutter device 1 of the present invention will be described with reference to the drawings. In FIG. 1, a rotating cam shaft 4 is supported by a drive device (not shown) on the frame 3 on the side of the reverse weft insertion, and three rotating cams 5, 6, 7 are integrally fixed to the cam shaft 4. There is. Further, substantially central portions of an I-shaped arm 10, a T-shaped arm 11 and a Y-shaped arm 12 are pivotally attached to the frame 3 via pivots 8. As shown in FIG. 2, the upper end of the I-shaped arm 10 is biased rearward by a tension spring 13 interposed between the I-shaped arm 10 and the frame 3, and the cam follower 14 provided at the lower end of the I-shaped arm 10 rotates. It is adapted to come into contact with the cam surface of the cam 5. In addition, in FIG. 3, the upper end of the T-shaped arm 11 is biased rearward by a tension spring 15 like the I-shaped arm 10, and a cam follower 16 provided at the lower end of the T-shaped arm 11 of the rotary cam 6 is provided. It comes into contact with the cam surface. At the rear end of the T-shaped arm 11, the lower end of the swing member 18 formed on the suction nozzle 18a is rotatably supported by a shaft 19, and as shown in FIG. The upper part of 18 and the lower part of the I-shaped arm 10 are connected by a connecting rod 20. Therefore, when the cam shaft 4 is rotated, the suction nozzles 18a of the swinging member 18 are lowered from the standby position A to the weft holding position B in FIG. Then, in synchronism with the well-known reed 23 which moves back and forth at a predetermined timing, the shaft 19 is used as a fulcrum to oscillate forward to the weft thread separating position C, and then ascends and retracts to return to the standby position A again. ing.

Next, a weft end holder 25 composed of the suction nozzle 18a, the gripper 24 and the like will be described. The weft end holder 25 is disclosed by the applicant in Japanese Patent Application No. 3-83423. The detailed description is omitted because it is almost the same as that described above. The lower end of the side wall 26 of the suction nozzle 18a is cut out in a shape that spreads out from a grip 31 described later, and is connected to one end of a suction duct 27 connected to a suction recovery device (not shown) so as to always perform a suction action. When the weft yarn end Q inserted by the weft yarn is released from the repayer 28 (shown in FIGS. 7 to 11), the weft yarn end Q is bent (90 degrees) with respect to the weft inserting direction and sucked. It is like this. Further, the gripper 24 integrally mounted on the side wall 26 facing the woven fabric end of the suction nozzle 17 is composed of a fixed gripping piece 24a and a movable gripping piece 24b, and the fixed gripping piece 24a is screwed and fixed to the side wall 26 to be movable. The gripping piece 24b is rotatably supported by the side wall 26 at a substantially central portion. The weft yarn is gripped by the grip portion 31 formed by both gripping pieces 24a and 24b. Further, the upper end of the movable gripping piece 24b is biased rearward by a leaf spring 32 interposed between the movable gripping piece 24b and the side wall 26 of the suction nozzle 18a, and engages with an engaging surface 33a of a bracket 33 fixed to the frame 3. The engaging piece 34 is attached. Therefore, while the suction nozzle 18a moves from the standby position A to the weft holding position B, the engagement piece 34 engages with the engagement surface 33a, and the upper portion of the movable gripping piece 24b moves forward against the bias of the leaf spring 32. When pushed, the gripper 31 is released, and the engagement piece 34 does not engage with the engagement surface 33a. For example, when the suction nozzle 18a is located at the weft cutting position C, the upper portion of the movable gripping piece 24b is a leaf spring. The grip portion 31 is in a gripping state by being urged rearward by the action of 32.

Next, the cutter device 1 disposed between the suction nozzle 18a located at the weft cutting position C in FIGS. 1, 4, 5, and 6 and the woven fabric will be described. The upper end of the Y-shaped arm 12 is biased rearward by a tension spring 38 like the I-shaped arm 10 and the T-shaped arm 11, and a cam follower 39 provided at the lower end of the Y-shaped arm 12 is a rotating cam. It comes into contact with the cam surface of No. 8. At the rear end of the Y-shaped arm 12, an engagement pin 40 that engages with an engagement groove 49 of a swing piece 45 described later is provided in a protruding manner. The bracket 41 attached to the frame 3 is attached with a guide plate 42 having a guide groove 42a for guiding the end portion of the weft to be beaten to the beating position P. A support pin 43 is provided on the bracket 41 in a protruding manner, and a swing piece 45 is rotatably supported by the support pin 43. A movable blade 46 and a fixed blade 47 are attached to the side surface of the swinging piece 45 in the cloth direction and the side surface of the guide plate 42 in the direction of the suction nozzle 18a to form a cutter 48. The edge of the fixed blade 47 is located slightly rearward from the beating position P. An engagement groove 49 is formed at the upper end of the swing piece 45, and the engagement pin 40 of the Y-shaped arm 12 is engaged with the engagement groove 49. Accordingly, the action of the rotary cam 7 causes the swing piece 45 to swing up and down at a predetermined timing, bring the movable blade 46 close to the fixed blade 47, and beating the beating end Q of the weft yarn positioned at the blade tip of the fixed blade 47. Is designed to be separated. Further, the weft end portion Q is elastically held between the guide plate 42 and the guide plate 42 on the side surface in the cloth direction of the guide plate 42 before and after the cutting of the tip of the weft yarn end Q by the cutter 48 and before and after the cutting. A holding leaf spring 50 exemplified as a holding body is screwed.

Next, the operation of the cutter device 1 configured as above will be described. When the shuttleless loom 2 is operated, the reed 23 oscillates back and forth to perform a predetermined beating motion as is well known, and when the reed 23 retreats, the replier 28 is provided in the opening between the upper thread and the lower thread. The weft is inserted, and then the heddle frame switches the warp up and down to perform the predetermined weaving. When the reed 1 is located at the final retracted position shown by the solid line in FIG. 3, the suction nozzle 18a is located at the standby position A, the weft insertion is started by the repier 28, and the repier 28 grips the weft and recoils the weft. The suction nozzle 18a moves from the standby position A to the weft grasping position B by the action of the rotating cams 5 and 6 in accordance with the timing when the replier 28 passes under the suction nozzle 18a after moving to the cloth end on the loading side (FIG. 7). Move towards. At this time, the grip portion 31 of the gripper 24 is in the released state because the engagement piece 34 is in pressure contact with the engagement surface 33a. Then, the repier 28 passes through the suction nozzle 18a, reaches the weft insertion arrival point, and separates the weft end. Then, the weft ends are guided in the suction nozzle 18a in a direction orthogonal to the weft inserting direction by the suction action of the suction nozzle 18a located at the weft gripping position B in FIG. Thus, when the weft ends are held in tension, the suction nozzle 18a starts to swing toward the weft cutting position C together with the reed 1 which has moved to the center of the opening in FIG. The engagement piece 34 of the movable gripping piece 24b of the gripper 24 is disengaged from the engagement surface 33a, the grip portion 31 of the gripper 24 is in a gripping state, and the weft end is in a tension state with the gripping portion of the gripper 24. It is held as it is (Fig. 8).

Thereafter, as shown in FIG. 9, the suction nozzle 18a swings in synchronization with the beating motion of the reed 23 to the weft separating position C shown in FIG. To do. During this swinging movement, when the suction nozzle 18a approaches the weft cutting position C, the weft end portion Q, which is held taut by the suction nozzle 18a, is guided by the guide plate 42 toward the beating position P. Starting from the middle of this guide, the weft yarn end Q is elastically held between the guide plate 42 and the holding leaf spring 50 and part of the weft end Q is positioned at the tip of the fixed blade 47. Then, as shown in FIG. 10, the reeds 23 move to the retracted end position, and the rapier 28 starts to enter into the opening for the next weft insertion. Further, the action of the rotary cam 7 causes the swinging piece 45 to swing downward, bringing the movable blade 46 closer to the fixed blade 47 and separating the front end of the weft yarn end Q.

Thereafter, as shown in FIG. 11, the suction nozzle 18a returns to the standby position A in FIG. 3 while holding the yarn end waste by the gripper 24 in order to suck and hold the next weft yarn end. At this time, the engaging piece 34 of the movable gripping piece 24b of the gripper 24 is engaged with the engaging surface 33a, the gripping portion 31 is released, and the gripper 24 releases the thread end waste which has been gripped until now, The yarn end waste is sucked by the suction nozzle 18a and collected by the yarn end waste collecting device (not shown) via the suction duct 27. After that, the rapier loom repeats the above operation. Further, the above-mentioned weft yarn end portion Q with its tip cut off is woven while being kept elastically held between the guide plate 42 and the holding leaf spring 50 during several subsequent picks for beating. The woven cloth is wound up by the winding roller 51 (not shown) (shown in FIGS. 2, 3 and 4) and is advanced, and then the elastic holding state is released.

As described above, in the cutter device 1 of the present embodiment, the weft yarn end portion Q which is held taut by the suction nozzle 18a is guided by the guide plate 42 toward the beating position P while being guided by the guide plate 42. It is elastically held between the holding plate spring 50, and after the beating is completed and the tip is cut off by the cutter 48, even after several beatings, the guide plate 42 and the holding plate spring 50 are elastic between picks. Since the holding state is maintained, after the tip of the weft yarn end portion is cut off by the cutter 48, it is not immediately loosened by the elasticity of the weft gripping body, and a cloth with good ear tightness can be woven.

In the cutter device 1 of the above-described embodiment, the holding plate panel 50 and the wire 52 illustrated as the holding body may be used (shown in FIG. 12).

[Effect of the device]

 As described above, in the cutter device of the shuttleless loom of the present invention, the guide plate for guiding the weft end of the weft insertion side to the cloth fell is provided on the weft insertion side, and the guide plate holds the weft holding member. A fixed blade that forms a cutter with a movable blade that swings in synchronization with the beating is attached to the side surface in the tool direction, and the guide plate is attached to the side surface in the cloth direction before and after cutting the weft end tip by the cutter. Since a gripping body that elastically holds the weft end with the guide plate was provided during the several subsequent picks, tension was applied to the weft even after the weft end was cut off with a cutter. Because of its own elasticity, it does not become loose immediately, and it is possible to woven higher quality woven cloth with tightness in the ears.

[Brief description of drawings]

FIG. 1 is a plan development view of a shuttleless loom.

FIG. 2 is a partial explanatory diagram of FIG.

FIG. 3 is a partial explanatory diagram of FIG.

FIG. 4 is a partial explanatory diagram of FIG.

FIG. 5 is a side view of a cutter device.

FIG. 6 is a front view of FIG.

FIG. 7 is an operation explanatory view.

FIG. 8 is an operation explanatory view.

FIG. 9 is an operation explanatory view.

FIG. 10 is an operation explanatory view.

FIG. 11 is an operation explanatory view.

FIG. 12 is a diagram showing another embodiment.

[Explanation of symbols]

1 cutter device, 2 shuttleless loom, 25 weft holder, 42 guide plate, 46 movable blade, 47
Fixed blade, 48 cutter, 50 Leaf spring for holding, P
Origami, Q Weft end

Claims (1)

[Scope of utility model registration request] 1. A shuttleless loom in which a weft end is held by a weft holder on the side opposite to the weft insertion side without using a weft end catching yarn, and the beating is performed while keeping this holding state, A guide plate is provided to guide the end of the weft thread on the reverse weft insertion side to the cloth fell, and the guide plate has a side surface facing the weft thread holder, and a movable blade that swings in conjunction with the repulsion to form a cutter. A blade is attached, and the guide plate is provided on the side surface in the cloth direction with a gripping body that elastically holds the weft end with the guide plate between several picks before and after cutting the end of the weft end by the cutter. A cutter device for a shuttleless loom.