JPH073579A - Tucking and gripper unit of tucking device - Google Patents

Abstract

PURPOSE:To prevent happening of a fault in a selvage structure caused by an inaccurate gripping operation of a gripper due to accumulation of waste fibers, in relation to a method for forming a tuck-in selvage in a shuttleless loom and a device therefor. CONSTITUTION:When moving a needle 12 nipping the end of a weft yarn backward and drawing the weft yarn out of a gripper 20 while bending back the end 49 of the weft yarn into the shed of warp yarns, the gripper 20 is slightly opened. The gripper 20 is attached to a shaking bracket 19 pivoted to a stationary bracket 15 fixed to the second mobile unit 2 in a state where the gripper is energized by a spring 31 in the closing direction. A control unit 30 for making this gripper 20 perform an opening operation is also attached to the shaking bracket. A back-up piece 32 is attached to the control unit 30 and a shaking unit 42 connected to the stationary bracket 15 at one end and facing to the back-up piece 32 at the other end is pivoted to the first mobile unit 1 set adjacently to the second mobile unit 2. The other end of the shaking unit 42 is brought into contact with the back-up piece 32 by a relative motion of the first mobile unit 1 and the second mobile unit 2 so as to push the control unit 30 in the direction for opening the gripper.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapier room or an air jet room, which has an ear structure similar to that of a woven cloth woven by a shuttle loom by folding back the ends of the wefts inserted into the woven cloth side. The present invention relates to a tuck-in method for forming an end portion and a gripper device of a tuck-in device used for carrying out the tuck-in method.

[0002]

2. Description of the Related Art In order to fold back the weft thread inserted into the weft (hereinafter referred to as tuck-in), the weft thread is beaten, then the tip of the weft thread is grasped and the warp shed of the weft selvage is opened. After hooking the weft end on the needle that passes through from the woven fabric side to the outside of the weave, cut the weft end outside the gripper that holds the weft end, and hold the weft end with the gripper, that is, tuck-in. The needle is retracted to the woven fabric side in a state where resistance is applied to the weft yarn so that the weft yarn tip does not loosen when it is sewn, and this retracting action causes the weft yarn tip to be pulled out from the gripper and folded back to the woven fabric side. There is.

[0003]

In order to perform the tuck-in reliably, it is necessary to surely perform the operation of gripping the tip of the weft with the gripper and hooking the tip of the needle.
The gripper grips the weft end by sandwiching the weft end with two pieces, but when the weft end is cut by a cutter and when the needle retracts, the weft end is pulled out from the gripper. When the fiber scraps are accumulated between the grippers of the gripper, the gripper does not close completely, which makes the grip of the weft yarn end uncertain, and the weft yarn end is hooked on the needle. Mistakes occur and defects occur in the woven ear tissue. An object of the present invention is to provide a technical means for preventing the occurrence of defects due to the above-mentioned causes.

[0004]

According to the tuck-in method of the present invention, after wefting the weft yarn inserted, the tip 49 of the weft yarn is grasped by the gripper 20 and passed from the woven fabric side through the warp opening of the weave. After hooking the weft thread tip 49 on the needle 12 that advances to the outside of the weaving selvage, the weft thread is cut at the outer part of the gripper 20, and then the needle 12 is retracted to the woven fabric side while the gripper 20 holds the weft thread tip. Thus, in the tuck-in method in which the weft thread tip 49 is pulled out from the gripper 20 and is inserted into the warp opening of the weave in the folded back state, when the weft thread tip is pulled out from the gripper 20 by the backward movement of the needle 12, the gripper 2
It is characterized by opening 0 slightly.

The gripper device of the tuck-in device according to the present invention comprises a fixed bracket 15 fixed to the second moving body 2.
A gripper 20 biased in a closing direction by a spring 31 is provided on a swing bracket 19 which is swingably pivoted on the operating body 30 for opening the gripper 20 against the biasing force of the spring 31. The first moving body 1 is linked to the swing bracket 19 and is moved by the relative movement of the first moving body 1 and the second moving body 2 so that the gripper 20 is moved and gripped by the gripper 20. The weft thread tip 49 is hooked on the tuck-in needle 19, and the cutter blade 17 attached to the fixed bracket 15 is moved by the movement of the gripper 20 at the relative movement stroke end between the first moving body 1 and the second moving body 2. In the gripper device of the tuck-in device for cutting the weft yarn tip 49, the operating member 30 is provided with the receiving piece 3
2 is provided, and one end of the first moving body 1 is linked to the fixed bracket 15 and the other end of the oscillating body 42 is exposed to the receiving piece 32. Body 2
When and are moved beyond the end of the relative movement stroke, the other end of the rocking body 42 comes into contact with the receiving piece 32 and the operating body 3
It is characterized in that 0 is pushed in the gripper opening direction.

[0006]

The opening operation of the gripper 20 when the needle 12 retracts is performed by slightly opening the grippers 21 and 25 of the gripper 20 (about the thickness of the weft to be gripped). This operation reduces the gripping force of the weft thread by the gripper, and when the weft thread tip 49 is pulled out of the gripper 20 by the retreating operation of the needle 12, the two nips 21 that hold the weft thread tip in a slightly open state. , 25
The fluttering movement of the weft ends shakes away the fine fiber waste that has entered between the sandwiching pieces 21 and 25, and the fiber waste is accumulated between the sandwiching pieces 21 and 25 of the gripper. Is prevented. Therefore, it is possible to prevent the gripper from being completely closed due to the accumulation of the fiber waste on the gripper, and therefore, the gripper can reliably grip the tip of the weft thread, thereby preventing the occurrence of a defect in the ear tissue due to the tuck-in mistake. .

According to the gripper device of the present invention having the above-mentioned structure, the operating body 30 of the gripper is provided with the receiving piece 32, the first moving body 1 is provided with the swinging body 42, and one end thereof is linked to the fixed bracket 15. At the same time, the other end is the receiving piece 32.
The tuck-in method of the present invention can be carried out with a simple structure in which the receiving piece 32 and the rocking body 42 are mounted.
By adjusting the relative positional relationship with the needle 12
The feature is that it is also possible to easily adjust the degree of opening of the gripper 20 when retracting.

[0008]

1 to 3 are views showing a tuck-in device of the present invention, and FIG. 1 is a perspective view of members constituting the device seen from the back side (reed side) of the loom, for easy understanding. In the figure, the members are illustrated with the distance between them left and right. 2 is a front view, and FIG. 3 is a perspective view seen from the opposite side of FIG. The device shown is three rods (moving bodies) driven by four cams fixed to a cam shaft (not shown).
Tuck-in devices are attached to 1, 2, and 3. First rod (first moving body) 1 and second rod (second moving body)
The second rod 3 is attached to the cam casing of the cam so as to be movable only in the axial direction, and is moved forward and backward in association with one cam, and the third rod 3 is attached to the cam casing so as to be axially movable and rotatable. Are connected to two cams, one of them is driven to move back and forth, and the other cam is driven to swing around the rod axis. Figure 1
Includes a cam lever 4 for swinging and driving the third rod 3,
There is shown a return spring 5, a cam lever 4, and a connecting rod 7 that connects the flange 6 of the spline bearing that supports the third rod 3 so as to be movable in the axial direction. The spline bearings 8 and 9 that support the first rod 1 and the second rod 2 so as to be movable in the axial direction are fixedly provided on the cam casing. Therefore, the first rod 1 and the second rod 2 are axially movable. Only move in the direction.

An arm 11 extending laterally is fixed to the tip of the third rod 3, and an arcuate needle 12 centered on the axis of the third rod is fixed to this arm. The needle 12 has a hook 13 for hooking the weft end. Needle 12 is shown in FIG.
By turning to the outside of the selvage through the space between the warp openings 14 in the selvage selvage, hooking the weft end on the hook 13, and then turning the third rod 3 clockwise in the figure. By the movement, the front end of the weft yarn is folded back and drawn into the warp yarn opening 14 at the weft selvage portion.

A side surface of the end of the second rod 2 has a substantially L shape.
A character-shaped fixed bracket 15 is fixed via a holder 16, and a cutter blade (fixed blade) 17 is attached to a lower end portion of the fixed bracket. Then, a fulcrum pin 18 is planted on the front side (back side in FIG. 1) of the cutter blade,
A swing bracket 19 is mounted around the fulcrum pin so as to be swingable. The cutter blade 1 of the swing bracket 19
7 is integrally formed with a fixed gripping piece 21 of the gripper 20. The side surface of the gripping piece on the back side in FIG. 1 cuts the weft yarn tip 22 with the cutter blade 17. Has become. As shown in FIG. 3, the swing bracket 19 is attached to the fixed bracket 15 while being pressed by the cutter blade 17 by the spring 23. When the swing bracket 19 swings right around the fulcrum pin 18 in FIG. , Clip 21
The weft yarn tip located between the cutter blade 17 and the cutter blade 17 is cut by a shearing operation.

The movable side clip 25, which clamps the front end of the weft in cooperation with the fixed clip 21, is located below the fixed clip 21 (cutter blade side), and the movable clip 25 is located below the fixed clip 21. An operation pin 26 extending upward is fixed to 25, and the operation pin 2
The reference numeral 6 slidably penetrates the fixed sandwiching piece 21 and the bearing portion 27 located above the fixed sandwiching piece 21, and the tip thereof projects above the swing bracket 19, and the pressing head 28 is fixed to the projecting end. . A spring receiver 30 is fixed to the intermediate portion of the operation pin 26 with a set screw 29.
A compression spring 31 interposed between 0 and the fixed sandwiching piece 21 urges the moving sandwiching piece 25 upward, that is, in the closing direction. The mounting position of the spring receiver 30 on the operation pin 26 can be adjusted by loosening the setscrew 29. The spring receiver 30 has a receiving piece 32 protruding toward the second rod 2 side in a short length. It is provided integrally.
At the base end of the arm 11 fixed to the tip of the third rod, a head retainer 3 extending in a direction opposite to the extending direction of the arm 11 is provided.
3 is fixed, and this head presser 33 is located above the presser head 28 at the upper end of the operation pin 26 in an actual device. When the third rod 3 is rotated rightward in FIG. 1 and the needle 12 is pulled up, the head presser 33 is lowered to press the presser head 28, the moving side clip 25 is lowered, and the gripper 20 is opened. It is supposed to be.

The woven cloth 35 being woven is located on the left front side in FIG. 1, and is woven while being fed to the left back side in FIG. Therefore, the warp yarn 36 opens toward the front side in FIG.
The woven selvage of the woven cloth is located approximately at the height of the gripper 20 between the second rod 2 and the third rod 3, and the entanglement thread 37 is arranged on the right back side of the gripper 20 in FIG. The tip of the extra weft thread cut by the cutter blade 17 is gripped by the entangled thread 37 and carried away to the left back side in the drawing.

A guide groove 38 in the radial direction of the fulcrum pin 18 is provided above the fulcrum pin 18 of the swing bracket 19, and a slide piece 39 is slidably fitted in the guide groove 38. . This slide piece is provided with a through hole 40 parallel to the fulcrum pin 18, and a swing pin 41 fixed to the tip of the first rod 1 via a holder 51 and a bracket 52 in a direction parallel to the fulcrum pin 18 slides. It is inserted through the through hole 40 of the piece 39. Therefore, when the first rod 1 retracts relative to the second rod 2 (moves to the back side in the figure), the swing bracket 19 moves the fulcrum pin 1
1, the gripper 20 moves upward by turning counterclockwise in FIG. On the contrary, when the first rod 1 relatively advances (moves to the front side in the figure), the swing bracket 19 rotates clockwise in FIG. 1 and the gripper 20 moves downward.

A swinging body 42 shaped like a spiral spring is rotatably inserted into the swing pin 41, and one end 43 of the swinging body 42 is bent in a direction parallel to the swing pin 41 so as to extend in a vertical direction on the fixed bracket 15. The other end 45 is connected to the groove 44.
Faces directly above the receiving piece 32 provided on the spring receiver 30. The rocking body 42 is formed into a coil spring shape,
It has no elasticity and operates as a rigid body. Therefore, an L-shaped crank lever may be used as the oscillating body 42.

Next, the operation of the tuck-in device constructed as described above will be described with reference to FIGS. Weft 46
When is inserted into the weft, first the repulsion is performed. During this beating, the first to third rods 1, 2 and 3 are retracted, and the tuck-in device is retracted before it interferes with the reed (FIGS. 4 to 6 (a)). When the reed starts to move backward, the first to third rods 1, 2 and 3 extend so as to follow it, and the tuck-in device advances to a predetermined operating position. At this time, the third rod slightly advances from the first and second rods 1 and 2 and starts to rotate, and after inserting the needle 12 into the warp shed 14 of the weave portion (see (b) of FIGS. 4 to 6). )), And moves back to a position closer to the cloth fell 47. As the needle advances, the head retainer 33
Is separated from the pressing head 28, and the gripper 20 is closed by the urging force of the spring 31 to grip the weft yarn end 49 between the weave 48 and the entanglement yarn 37. Then, before the approaching operation of the needle 12 to the cloth fell 47 side, the first rod 1 slightly moves forward with respect to the second rod 2 to move the gripper 20 downward so that the needle 12 is gripped by the gripper 20. So that it enters right above the weft yarn tip 49 (see FIGS. 4 to 6).
(C)).

Next, the first rod 1 is moved backward relative to the second rod 2 to move the gripper 20 upward ((d) of FIGS. 4 to 6), and then the first rod 1 and the second rod 2 are moved. By retreating the rod 2 and the weft at the same time, the weft tip 49
Is pulled back to the cloth fell side and the weft tip 49 is wound around the hook 13 at the tip of the needle 12 ((e) in FIGS. 4 to 6). And gripper 20
When only the first rod 1 advances, the gripper 20 moves downward at the position where the weft has moved to the cloth fell side, and at the lower end of the movement, the weft thread tip 49 is formed between the gripper fixed clip 21 and the cutter blade 17. Disconnect. When the cutting operation of the weft yarn tip 49 by the cutter blade 17 is performed, that is, when the first rod 1 reaches the relative moving end in the advancing direction with respect to the second rod 2, the swinging body 42 mounted on the swing pin 42.
1 reaches the swing end in the clockwise direction in FIG. 1, and at this time, the end portion 45 of the swing body 42 slightly pushes the receiving piece 32 of the spring receiver 30 downward. This pushing operation causes the operation pin 26 to move downward, and therefore the moving side grip 25 of the gripper 20 to move downward so that the grips 21 and 25 of the gripper 20 are slightly separated ((g) of FIGS. 4 to 6). . Immediately after this operation, the third rod 3 rotates clockwise in FIG.
While pulling out the weft yarn tip 49 hooked by 3 from the gripper 20, the weft yarn tip 49 is folded back into the warp yarn opening of the weave portion ((h) of FIGS. 4 to 6). At the end of this tuck-in operation, the next weft yarn is inserted into the warp shed and the first to third
After the rods 1, 2, 3 retract and the tuck-in device retracts, the weft tip folded back by the beating operation and the next weft are driven at the same time.

[0017]

According to the present invention described above, the accumulation of fiber debris on the gripper of the tuck-in device is avoided, and the gripper can surely grip the tip of the weft thread. Therefore, the occurrence of tuck-in mistake is prevented. Therefore, it is possible to avoid the occurrence of defects in the woven fabric due to the tuck-in mistake.

[Brief description of drawings]

FIG. 1 is a perspective view of members constituting a tuck-in device as seen from the rear inside of a loom.

FIG. 2 is a front view of the tuck-in device.

FIG. 3 is a perspective view of members constituting the tuck-in device as seen from the front outside of the loom.

FIG. 4 is a plan view of a main part showing the operation of the tuck-in device in sequence.

FIG. 5 is a side view of the main part showing the operation of the tuck-in device in sequence.

FIG. 6 is a rear view of the main part showing the operation of the tuck-in device in sequence.

[Explanation of symbols]

 1 rod 2 rod 3 rod 12 needle 15 fixed bracket 17 cutter blade 19 swing bracket 20 gripper 21 sandwich piece 25 sandwich piece 30 spring bearing 31 compression spring 32 receiving piece 42 swing body 49 weft end

Claims (2)

[Claims] 1. The reeded weft yarn is beaten, and then the front end (49) of the weft yarn is gripped by a gripper (20) and passed from the woven fabric side to the outside of the weave through the warp opening of the weave. After hooking the weft end (49) on the needle (12) to advance, gripper (20)
Cut the weft thread on the outer side of the weft, and then with the gripper (20) holding the weft thread tip, retract the needle (12) toward the woven fabric side, pulling out the weft thread tip (49) from the gripper (20), and In the tuck-in method of inserting the part in the warp opening in a folded state, the tuck-in is characterized in that the gripper (20) is slightly opened when the tip of the weft is pulled out from the gripper (20) by the backward movement of the needle (12). Method. 2. A gripper (5) biased in a closing direction by a spring (31) to a swing bracket (19) swingably supported by a fixed bracket (15) fixed to a second moving body (2). 20) is provided, and an operating body (30) for opening the gripper (20) against the biasing force of the spring (31) is provided.
(1) is linked to the swing bracket (19), and the gripper is moved by the relative movement of the first moving body (1) and the second moving body (2).
(20) is moved and the weft end (4
Perform the operation of hooking 9) on the tuck-in needle (12),
The relative movement between the first moving body (1) and the second moving body (2) causes the cutter blade (17) mounted on the fixed bracket (15) to move the weft end (49) by the movement of the gripper (20) at the stroke end. ) Is provided in the gripper device of the tuck-in device, the operating body (30) is provided with a receiving piece (32), one end of the first moving body (1) is linked to the fixed bracket (15) and the other end is When the swinging body (42) facing the receiving piece (32) is pivotally attached and the first moving body (1) and the second moving body (2) are moved beyond the relative movement stroke end. The gripper device of the tuck-in device, characterized in that the other end of the oscillating body (42) abuts the receiving piece (32) to push the operating body (30) in the gripper opening direction.