JPH0718540A - Weft-feeding device of loom - Google Patents

Abstract

PURPOSE:To feed a weft such as foil, film or other flat yarn in a tension-free state. CONSTITUTION:The characteristic of this weft-feeding device of a loom comprises disposing a pair of holed fittings 23, 24 at an interval at the tip of an arm 20, passing a foil 3, film or other weft through the holed fittings 23, 24, respectively, engaging a hook 21 with the weft between the holed fittings 23, 24, transmitting and connecting an arm-driving mechanism to the arm 20, driving the arm 20 to move between the first and second positions, separating the holed fittings 23, 24 apart from the hook 21 at a constant distance at the first position, disposing the holed fittings 23, 24 at the position of the hook 21 at the second position, transmitting a hook-driving mechanism to the hook 21, moving the arm 20 to the first position, moving back the hook 21 from a weft-engaging position to separate the hook 21 from the weft when a weft is stored between the fittings 23, 24 and the hook, and moving forward the hook 21 to the weft-engaging position to engage the hook with the weft when the arm 20 is moved to the second position.

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, in the case of a relatively wide fabric, it is necessary to move the rapier with a large stroke. However, for example, when a foil is used as the weft yarn and the rapier is moved with a large stroke, when this is moved at a high speed, friction acts on the foil in the feed path of the foil and a large tension is generated in the foil. I can't avoid it. Therefore, there is a problem that the foil cannot be supplied accurately. Not only the foil but also a film or other flat yarn may be used as the weft yarn, but similarly, a large tension is generated in the film or other flat yarn, and this cannot be accurately supplied.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention has been made to solve the above-mentioned problems of the prior art and to supply a weft yarn such as a foil, a film or other flat yarn in a tension-free state.

[0004]

According to the present invention, a pair of through-fittings are provided at intervals at the tip of the arm, and a foil is attached to each through-fitting,
A weft, such as a film or other flat yarn, is threaded and a hook engages the weft between the threaded fittings. further,
An arm driving mechanism is transmission-coupled to the arm, and the arm driving mechanism drives the arm to move the arm to the first position and the second position.
Swinging between positions, the threaded fitting is spaced a fixed distance from the hook in the first position, and the threaded fitting is positioned at the hook in the second position. Further, when the hook drive mechanism is power-coupled to the hook, the arm swings to the first position, and the weft yarn is stored between the threading metal fitting and the hook, the hook drive mechanism drives the hook to move the hook to the weft engagement position. Back from
When detached from the weft and the arm swings to the second position,
The hook is driven by the hook driving mechanism, the hook advances to the weft engaging position, and engages with the weft.

[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, as shown in FIG. 2, the spindle 5 of the bobbin 4 is attached to the lever 6, and the lever 6 is supported by the fulcrum 7, so that it can swing around the fulcrum 7.
Further, the spring 8 is engaged with the lever 6, and this acts on the support shaft 5, and around the support point 7, the lever 6
Is elastically urged clockwise in FIG. 2, the support shaft 5 is elastically urged toward the length measuring drum 1, and 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, the spring 13 is engaged with the arm 11, which acts on the support shaft 10, and the lever 11 is elastically biased in the counterclockwise direction in FIG. Elastically urged toward 1,
The outer circumference of the press roller 9 is pressed against the outer circumference 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 apparatus, the weight 14 is provided with a through metal fitting 15 downstream of the press roller 9, and the foil 3 is passed through the through metal fitting 15, and the weight 14 is guided to a guide rail (not shown). It can be raised and lowered. 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.

Further, this apparatus has an arm 20 and a hook 21, the arm 20 is fixed to a drive shaft 22 thereof, and the holding metal fitting 16 and the receiving metal fitting 17 are the drive shaft 22.
It is located in the position. The arm 20 is for storing the foil 3, and has a pair of through metal fittings 23 and 24. The through metal fittings 23 and 24 are arranged at intervals and are provided and attached to the tip of the arm 20. Then, the foil 3 is passed through each of the fittings 23, 24, and this is guided to the rapier. The hook 21 is suitable for engaging the foil 3,
The guide rod 25 is fixed to the drive shaft 26 in combination with the guide rod 25, and the guide rod 25 is provided at the position of the hook 21 and fixed.

Further, the arm drive mechanism is transmission-coupled to the arm 20, and the hook drive mechanism is transmission-coupled to the hook 21. In this embodiment, the drive source of the loom is used as the arm drive mechanism, the drive shaft 22 of the arm 20 is transmission-coupled to the drive source of the loom, the drive shaft 22 is driven by the drive source of the loom, and the warp shed is opened. Each time, the drive shaft 22 rotates in one direction and the opposite direction. This allows the arm 20
Is driven, and the arm 20 swings between the first position and the second position. The position of FIG. 1 is the first position, and in the first position, the through fittings 23, 24 are arranged above the hook 21,
A certain distance from the hook 21. At the second position, the threaded fittings 23, 24 are lowered to the position of the hook 21 and are arranged at that position. Further, the drive source of the loom is used as a hook drive mechanism, the drive shaft 26 of the hook 21 is transmission-coupled to the drive source of the loom, the drive shaft 26 is driven by the drive source of the loom, and each warp opening is The drive shaft 26 rotates in one direction and the other direction. As a result, the hook 21 is driven and swings, and as will be described later, when the arm 20 swings to the first position and the foil 3 is stored between the through metal fittings 23 and 24 and the hook 21, the hook 21 moves. When the arm 20 swings to the second position by retracting from the engagement position and separating from the foil 3, the hook 21 advances to the foil engagement position and engages the foil 3.

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. Furthermore, 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, whereby the foil 3 is pulled out. Therefore, when the foil 3 is paid out from the bobbin 4, the foil 3 is not twisted. Further, the length measuring drum 1 is driven by the drive source of the loom, and the length measuring drum 1 is rotated by a fixed angle for each opening of the warp, and the foil 3 is rotated by the rotation angle.
Is determined. 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, downstream of the weight 14, the drive shaft 22 is driven by the drive source of the loom, and the drive shaft 22 rotates in one direction and in the opposite direction for each opening of the warp, and the arm 20 moves to the first position and the first position. Swing between two positions. Then, when the arm 20 swings to the second position and the fittings 23 and 24 descend to the position of the hook 21 and are arranged at that position,
The drive shaft 26 is driven by the drive source of the loom, and the drive shaft 2
6 rotates in one direction, and the hook 21 passes through the metal fittings 23, 24.
It swings between and advances to the weft engaging position. After that, the arm 20 swings to the first position, the through fittings 23 and 24 are arranged above the hook 21, and are separated from the hook 21 by a certain distance.

Therefore, when the hook 21 engages with the foil 3 between the threaded fittings 23, 24 and the arm 20 swings to the first position, the foil 3 is pulled by it, and the foil 3 is pulled.
Passes between the holding metal fitting 16 and the receiving metal fitting 17, and the through metal fitting 2
3 and the hook 21, and is stored between the through fittings 23 and 24 and the hook 21. 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 warps, the drive shaft 26 is driven by the drive source of the loom, the drive shaft 26 rotates in the opposite direction, and the hook 21 swings from the weft engagement position and retracts. Therefore, the foil 3 is engaged with the guide bar 25, and the hook 21 is separated 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, when weaving a relatively wide fabric, when the rapier is moved with a large stroke, 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 in tension free. 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, the weft yarn such as the foil 3, the film or other flat yarn is stored between the threaded metal fittings 23 and 24 of the arm 20 and the hook 21 for a required length. After that, the hook 21 can be detached from the weft yarn, and the weft yarn such as the foil 3, the film, or the other flat yarn can be supplied in a tension-free state. Therefore, for example, when weaving a relatively wide woven fabric with a rapier loom, when the rapier is moved with a large stroke, even if it is moved at a high speed, the weft yarn such as the foil 3, the film or other flat yarn can be accurately moved. It can be supplied and the intended purpose can be achieved.

[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]

 3 Foil 20 Arm 21 Hook 23, 24 Through fitting

Claims (2)

[Claims] 1. An arm, a pair of threading fittings provided at the tip of the arm at a distance and through which a weft thread such as a foil, a film or other flat thread is passed, and the weft thread engaging between the threading fittings. And a hook that mates with the arm, and swings the arm between a first position where the threaded fitting is separated from the hook by a certain distance and a second position where the threaded fitting is located at the hook. And an arm drive mechanism for driving the hook, the arm swings to the first position, and the hook retracts from the weft engaging position when the weft is stored between the threading fitting and the hook. And a hook driving mechanism for moving the hook forward to the weft engaging position and engaging the weft when the arm is swung to the second position. Apparatus. 2. The loom is a rapier loom, the arm drive mechanism and the hook drive mechanism are drive sources for the loom, and the arm moves between the first position and the second position for each warp opening. The weft supply device according to claim 1, wherein the hook is disengaged from the weft when the rapier is swung and the rapier is inserted between the warps.