JPH0711541A - Weft yarn feeder for loom - Google Patents

Abstract

PURPOSE:To feed weft yarn such as a foil, a film or another flat yarn so as to prevent twisting from occurring. CONSTITUTION:A bobbin 4 around which weft yarn is wound is arranged so as to oppose to the outer periphery of a length measuring drum 1 and supported on a supporting shaft 5 which substantially extends parallel to the driving shaft 2 of the length measuring drum 1. An elastic means such as a spring 8 acts on the supporting shaft 5 of the bobbin 4 to elastically urge the supporting shaft 5 of the bobbin 4 toward the length measuring drum 1. The weft yarn wound around the bobbin 4 is pressed against the outer periphery of the length measuring drum 1, which is then driven by a driving source and rotated to drive and rotate the bobbin 4 therewith. Thereby, the weft yarn is delivered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft supply device for supplying a weft yarn such as foil, film or other flat yarn to a rapier in a rapier loom.

[0002]

2. Description of the Related Art In a rapier loom, a weft is guided to a rapier, a rapier is inserted between the warps at each warp opening, and the weft is supplied to the rapier and passed between the warps. It is well known that a woven fabric is woven by this. By the way, as for the weft yarn to be supplied to the rapier, hitherto, the weft yarn is wound around a bobbin, the bobbin is fixed at a predetermined position, and the weft yarn is pulled out in the axial direction of the bobbin, thereby supplying the weft yarn. Therefore, around the bobbin, the weft yarn is pulled out in a spiral shape. Therefore, when the foil is used as the weft yarn, the foil is twisted and supplied to the rapier and passed between the warp yarns. Therefore, there is a problem that the twist of the foil is scattered on the woven fabric and the appearance of the fabric is impaired. Not only the foil but also a film or other flat yarn may be used as the weft yarn, but it is the same that the appearance of the woven fabric is impaired due to twisting of the film or other flat yarn.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention has been made to solve the above-mentioned conventional problems and to supply weft yarns such as foils, films or other flat yarns without twisting.

[0004]

According to the present invention, the bobbin wound with the weft is arranged so as to face the outer circumference of the length measuring drum and is supported by the support shaft. The support shaft extends substantially parallel to the drive shaft of the measuring drum. Further, elastic means such as a spring acts on the support shaft of the bobbin, the support shaft of the bobbin is elastically urged toward the measuring drum, and the weft thread wound around the bobbin is pressed against the outer circumference of the measuring drum. Then, the length measuring drum is driven and rotated by the drive source, and the bobbin is driven and rotated by the length measuring drum, whereby the weft is fed.

[0005]

Description of Embodiments Embodiments of the present invention will be described below.

In FIG. 1, this is a weft supply device for a rapier loom, which has a length measuring drum 1 having a constant diameter, the length measuring drum 1 is fixed to a drive shaft 2 thereof, and the drive shaft 2 is a drive source of the loom. Is connected to the transmission. Therefore, the drive shaft 2 and the length-measuring drum 1 are driven and rotated by the drive source of the loom, and the length-measuring drum 1 is rotated by a constant angle for each warp opening. Further, the foil 3 is used as the weft yarn, the foil 3 is wound around the bobbin 4, the bobbin 4 is arranged so as to face the outer circumference of the length measuring drum 1, and is fitted and supported by the support shaft 5. The bobbin 4 can also be removed from the support shaft 5. The support shaft 5 extends substantially parallel to the drive shaft 2 of the length measuring drum 1.

Further, the elastic means acts on the support shaft 5 of the bobbin 4, the support shaft 5 of the bobbin 4 is elastically biased toward the measuring drum 1, and the foil 3 wound on the bobbin 4 is measured. It is pressed against the outer circumference of. In this embodiment, as shown in FIG. 2, the support shaft 5 of the bobbin 4 is attached to the lever 6,
The lever 6 is supported by a fulcrum 7, and can swing around the fulcrum 7. The elastic means comprises a spring 8 and is engaged with the lever 6. Therefore, the spring 8 acts on the lever 6 and the support shaft 5, and the lever 6 is elastically biased clockwise around the fulcrum 7 in FIG. 2, and the support shaft 5 is elastically biased toward the length measuring drum 1. It Therefore, the foil 3 wound around the bobbin 4 is pressed against the outer circumference of the length measuring drum 1.

Further, a press roller 9 is arranged downstream of the bobbin 4 so as to face the outer circumference of the length measuring drum 1, and is supported by a support shaft 10. Like the support shaft 5 of the bobbin 4, the support shaft 10 extends parallel to the drive shaft 2 of the measuring drum 1,
It is attached to the lever 11. Lever 11 is fulcrum 1
It is supported by 2 and can swing around the fulcrum 12. Further, a spring 13 is used as an elastic means, which engages with the arm 11 and acts on the support shaft 10. Therefore, around the fulcrum 12, the lever 11 is elastically biased counterclockwise in FIG.
Is elastically urged toward the length measuring drum 1, and the outer periphery of the press roller 9 is pressed against the outer periphery of the length measuring drum 1. The press roller 9 is for feeding the foil 3, and the foil 3 is guided and sandwiched between the press roller 9 and the measuring drum 1.

Further, in this embodiment, a through fitting 15 is provided on the weight 14 downstream of the press roller 9,
The foil 3 is passed through the through fitting 15, and the weight 14 is guided by a guide rail (not shown) and can be moved up and down. Therefore, the weight 14 acts on the foil 3. Further, a pair of limit switches (not shown) are provided along the guide rail, and when the weight 14 rises to the upper limit, one of the limit switches detects it, and when the weight 14 descends to the lower limit, It is detected by the other limit switch.

Further, downstream of the weight 14, a pressing metal fitting 16 is arranged above the receiving metal fitting 17, and the receiving metal fitting 17 is fixed to a frame (not shown) of the loom.
Regarding the holding metal fitting 16, a guide rod 18 penetrates it and is fixed to a receiving metal fitting 17.
6 is guided by a guide rod 18 and can move up and down. Furthermore, the spring 19 holds the metal fitting 1
6, the pressing member 16 is pushed down by the spring 19, and the foil 3 is guided and sandwiched between the pressing member 16 and the receiving member 17. The spring 19 has a small elasticity, and the foil 3 receives an appropriate frictional force.

This device also has an arm 20 and a hook 21, which is fixed to its drive shaft 22.
The press fitting 16 and the receiving fitting 17 are arranged at the position of the drive shaft 22. The arm 20 is for storing the foil 3, and has a pair of through fittings 23 and 24.
3, 24 are arranged at intervals and are attached to the tip of the arm 20, and the foil 3 is passed through the respective through fittings 23, 24 and guided to the rapier. Further, the drive shaft 22 of the arm 20 is transmission-coupled to the drive source of the loom, and the drive shaft 22 is driven by the drive source of the loom. As will be described later, the drive shaft 22 moves in one direction for each warp opening. Rotate in the opposite direction. Therefore, around the drive shaft 22, the arm 20 swings in one direction and the opposite direction, the through fittings 23 and 24 descend to the position of the hook 21, and rise to the position of FIG. 1, and this is repeated. Further, the guide rod 25 is provided at the position of the hook 21 and is fixed,
The hook 21 is fixed to its drive shaft 26, and the drive shaft 26 is drivingly connected to the drive source of the loom. Therefore, the drive shaft 26 is driven by the drive source of the loom, the drive shaft 26 rotates in one direction and the opposite direction for each opening of the warp, and the hook 21 swings in the one direction and the opposite direction, and this is repeated.

Therefore, in this apparatus, when the length measuring drum 1 is driven and rotated by the drive source of the loom, the bobbin 4 and the press roller 9 are driven and rotated by the length measuring drum 1 accordingly. The length measuring drum 1 rotates counterclockwise in FIG. 2, and the bobbin 4 and the press roller 9 rotate clockwise in FIG. Thereby, the foil 3 is paid out.

Therefore, as the bobbin 4 rotates,
The foil 3 is paid out in the tangential direction of the bobbin 4, and the foil 3 is not twisted. Therefore, it is possible to feed the foil 3 to the rapier without twisting the foil 3, and to weave the woven fabric with the untwisted foil 3, without impairing the appearance of the woven fabric. Further, the length measuring drum 1 is driven and rotated by the drive source of the loom, and the length measuring drum 1 is rotated by a constant angle for each warp opening.
The amount of feeding the foil 3 is determined by the rotation angle.
Therefore, even if the winding diameter of the bobbin 4 gradually decreases as the foil 3 is unwound, the foil 3 can be unwound and unwound by a constant length for each warp opening regardless of this.

Further, in this apparatus, the weight 14 acts on the foil 3, the foil 3 is pulled out by the weight 14, and the weight 14 descends along the guide rail. Therefore, the foil 3 can be accurately pulled out between the press roller 9 and the press fitting 16, and the foil 3 does not sag.

Further, downstream of the weight 14, the drive shafts 22 and 26 are driven by the drive source of the loom, and the arm 20 swings in one direction for each opening of the warp, so that the threaded metal fitting 2
3, 24 descend to the position of the hook 21. At the same time, the hook 21 swings in one direction, and the fittings 23, 24
Then, the arm 20 swings in the opposite direction, and the through fittings 23, 24 rise to the position shown in FIG. Therefore, the hook 21 is provided between the threaded metal fittings 23 and 24.
When the through metal fittings 23, 24 are raised to the position shown in FIG. 1, the foil 3 is pulled by this, and the foil 3 passes between the pressing metal fitting 16 and the receiving metal fitting 17 and is supplied to the through metal fitting 23 and the hook 21. And the metal fittings 23, 24 and the hook 2
Stored between 1 Along with this, the weight 14 pulls up the weight 14, and the weight 14 rises along the guide rail. After that, when the rapier is inserted between the warp threads, the hook 21 swings in the opposite direction, and the foil 3 moves toward the guide bar 2.
5, the hook 21 is disengaged from the foil 3.

Then, the rapier is inserted between the warp threads, and the foil 3
Is supplied to a rapier and is passed between warp threads, whereby a woven fabric is woven. Therefore, the through fitting 23,
The foil 3 can be stored between 24 and the hook 21 for a required length, and then the hook 21 can be separated from the foil 3 to supply the foil 3 in a tension-free state. Therefore, in the case of a relatively wide woven fabric, it is necessary to move the rapier with a large stroke, but even if it is moved at a high speed, the foil 3 can be accurately supplied and there is no problem.

When the foil 3 is not paid out for some reason, the weight 14 rises to its upper limit and is detected by the upper limit switch, and when the foil 3 is cut for some reason, the weight 14 reaches its lower limit. It descends and is detected by the lower limit switch. Therefore, the loom can be stopped once and the trouble can be dealt with.

Although the foil 3 is used as the weft yarn of the rapier loom in this embodiment, the weft yarn is not limited to the foil 3 and a film or other flat yarn may be used. The film or other flat yarn can also be fed without twisting and the fabric can be woven with the untwisted film or other flat yarn. Not only the rapier loom but also other loom may use this device to supply the weft yarn such as the foil 3, the film or other flat yarn.

[0019]

As described above, according to the present invention, as the bobbin 4 rotates, the weft yarn is paid out in the tangential direction of the bobbin 4, and the weft yarn does not twist. Therefore, the weft yarn such as the foil 3, the film or other flat yarn can be supplied so as not to twist, and the woven fabric can be woven with the untwisted weft yarn, and the appearance of the woven fabric is not impaired. Moreover, the amount of the weft fed out is determined by the rotation angle of the length measuring drum 1. Therefore, even if the winding diameter of the bobbin 4 gradually decreases as the weft is fed, the weft can be fed by a constant length for each opening of the warp regardless of this, and the intended purpose can be achieved. It is possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing a configuration of a bobbin and a press roller of FIG.

[Explanation of symbols]

 1 Measuring drum 2 Drive shaft 3 Foil 4 Bobbin 5 Spindle 6 Lever 8 Spring

Claims (3)

[Claims] 1. A length-measuring drum, a drive source for rotating the length-measuring drum, and a spindle which is arranged so as to face the outer circumference of the length-measuring drum and extends substantially parallel to the drive shaft of the length-measuring drum. The bobbin supported, and elastic means for elastically urging the support shaft of the bobbin toward the length measuring drum to press the weft thread wound on the bobbin against the outer circumference of the length measuring drum. A weft supply device for a loom, characterized in that the bobbin is rotated by means of the above-mentioned method to feed the weft. 2. A press roller disposed downstream of the bobbin so as to face the outer circumference of the length measuring drum and supported by a support shaft extending substantially parallel to the drive shaft of the length measuring drum, Elastic means for elastically urging the support shaft of the press roller toward the length-measuring drum and pressing the outer circumference of the press roller against the outer circumference of the length-measuring drum. The weft supplying device according to claim 1, wherein the weft yarn is fed out by sandwiching the weft yarn with the length measuring drum and rotating the press roller by the length measuring drum. 3. The weft supply device according to claim 2, wherein a weight is applied to the weft yarn downstream of the press roller, and the weft yarn is pulled out by the weight.