JP2001146654A - Device for preventing collapse of doup tissue of woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the collapse of doup tissues disposed at both the ends of a woven fabric. SOLUTION: In this doup tissue collapse-preventing device in a loom in which doup yarns are opened with an opening mechanism separately disposed from a warp-opening mechanism to form doup tissues at both the side ends of a woven fabric, a control member which is brought into the doup yarns to control the opening of the doup yarns between a reed and the opening mechanism for the doup yarns. The control member has a yarn control member for being brought into contact with the doup yarns to control the opening of the doup yarns, and the doup yarn control member can be adjusted at least in one direction among the vertical direction and the longitudinal direction. The longitudinal direction is the warp direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing entanglement of a woven fabric.

[0002]

2. Description of the Related Art Conventionally, the vertical position before weaving at the time of the maximum opening of a warp, that is, the vertical position where a weft inserted one pick before by the tension of an upper warp and a lower warp is stabilized is tangled. The vertical position before weaving at the time of the maximum opening of the yarn (hereinafter referred to as the balanced height), that is, the vertical direction in which the weft inserted one pick earlier is stabilized by the tension between the upper leno and the lower leno. May be different between the warp and the leno.

More specifically, as shown in FIGS. 8 and 9, the balanced height of warp yarns is 3 relative to the balanced height of warp yarns 20.
A shift L occurs where 0 is located above. Although the upper warp yarn 21 and the lower warp yarn 22 and the upper leno yarn 31 and the lower leno yarn 32 in FIG. 9 are actually adjacent to each other, they are shown separated in FIG.

[0006] As shown in FIG. 6, the cause of the displacement L is that the lower warp yarn 22 and the lower leno yarn 32 are located at substantially the same height when the maximum opening is performed, while the upper warp yarn 21 And that the height of the leno thread 31 on the upper side is different. In this case, as shown in FIG. 7, the vertical position of the midpoint 25 at the maximum opening of the warp and the midpoint 35 at the maximum opening of the leno is different by H. In particular, on the yarn supplying side, the weft Y is cut by the cutter after weft insertion, and the end of the weft is not grasped by a catch cord or the like, so that this problem is likely to occur.

For example, when the upper warp 21 and the lower warp 22 are at the maximum opening, the middle point 25 of the opening amount is located at the lower side, so that the balanced height 20 is located lower than when the warp is closed. . On the other hand, at the time of the maximum opening of the upper leno thread 31 and the lower leno thread 32, the upper and lower threads are evenly opened. The height 30 is also located at the same height as when the leno thread is closed. A difference L occurs between the balanced height 20 of the warp and the balanced height 30 of the twine.

[0006] In a planetary gear type opening device which is one of the twine yarn opening mechanisms, the twine yarn is uniformly opened vertically with respect to the rotation center of the planetary gear type opening device. On the other hand, the heddle frame, which is the warp shedding mechanism, usually has a non-uniform upper and lower shedding height depending on the type of woven fabric. That is, the middle point at the maximum opening ≠ the closing position.
The above means that the middle point of the opening amount at the time of the maximum opening is different between the middle point of the opening amount of the warp and the middle point of the opening amount of the leno. Here, the description has been made using the planetary gear type opening device as a representative, but a similar problem arises for all the opening mechanisms of the leno which have a leve opening mechanism and another opening mechanism and form a leno structure.

As shown in FIG. 8, due to the difference between the balanced height 20 and the balanced height 30, the above-mentioned displacement L causes the warp Y to be distorted. However, in practice, the balanced height 30 is equal to the balanced height 20 because the number of warp yarns is overwhelmingly larger than the number of twine yarns.
And the force to imitate the equilibrium height 20 works.
This force causes a tension difference between the upper leno 31 and the lower leno 32, which also affects the leno structure after beating.

FIG. 10 is a side view of the entangled tissue. (a) shows the upper leno 31 and the lower leno 3
This is a leno tissue when the tension with the second is equal. For the weft Y, the upper leno 31 and the lower leno 32
And cross the top and bottom equally. On the other hand, in (b), the tension of the upper leno 31 is larger than that of the lower leno 32, and the upper leno 31 and the lower leno 3
This is the case where a tension difference occurs between the two.

In the case (b), the upper leno 31 and the lower leno 32 intersect the weft Y uniformly in the upper and lower directions, breaking the leno structure. The collapse of the entanglement structure becomes remarkable when weaving a woven fabric of coarse density. Also,
Such collapse of the entangled tissue also leads to collapse of the woven ear tissue.

[0010]

In the above prior art, 1
The equilibrium height of the entangled portion of the weft inserted before the pick tries to follow the equilibrium height of the woven portion of the weave.
This is because the number of warp yarns is overwhelmingly larger than the number of leno yarns. The difference in tension between the upper leno thread 31 and the lower leno thread 32 causes the stability of the leno tissue to collapse, and eventually causes ear collapse.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to prevent collapse of a leno structure provided at both ends of a woven fabric.

[0012]

SUMMARY OF THE INVENTION According to the present invention, there is provided a weaving apparatus for preventing a leno from collapsing by using an opening mechanism provided separately from a warp shedding mechanism to form a leno at the end of a woven fabric. A regulating member is provided between the opening mechanism for the leno thread and the reed to contact the leno thread and regulate the leno thread opening.

Further, the regulating member has a leno thread regulating portion for regulating the shedding of the leno thread by contacting the leno thread, and the leno thread regulating portion can be adjusted in at least one of the vertical direction and the front-rear direction. Is provided. The front-rear direction is the warp direction.

According to the configuration of the present invention, by regulating the opening amount of the leno thread, the balanced height can be made equal between the maximum opening of the warp yarn and the maximum opening of the leno thread. In order to equalize the equilibrium height, the middle point 25 of the warp at the maximum opening of the warp and the leno are controlled by matching the opening of the warp and the twine, or by regulating the twine as shown in FIG. It is necessary to make the vertical position of the middle point 35 at the maximum opening equal. By making the midpoints at the maximum opening equal in this way, it is possible to eliminate the deviation of the equilibrium height at the maximum opening between the warp and the leno and prevent the leno structure from collapsing.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 3 show a first embodiment. A regulating member 10 for regulating the opening of the leno thread is fixed to a frame of a loom (not shown). The regulating member 10 is located between the leno tissue opening mechanism and the reed. Further, the leno thread regulating portion 102 of the regulating member 10 regulates the upper leno 31 so that the vertical position of the midpoint 25 at the maximum opening of the warp and the midpoint 35 at the maximum opening of the leno become equal. It is provided so that it may become a position.

The upper leno 31 and the lower leno 32
Height 30 by the regulating member 10
A regulating member 10 is provided so as to shift to 0 '. Figure 1,
As shown in FIG. 3, the upper leno thread 31 and the lower leno thread 3
During the opening, the leno thread regulating portion 102 contacts the upper leno thread 31 from the outside and regulates the opening, so that the upper leno thread 31 is more open than the position where it is in contact with the leno thread regulating portion 102. Nothing. For this reason, the upper leno 31 and the lower leno 32, and the upper warp 21 and the lower warp 2
Since the equilibrium heights of the two are the same, the problem shown in FIG. 10B does not occur.

FIGS. 4 and 5 show a second embodiment. The regulating member 10 includes a leno thread regulating portion 102, a front / rear position adjusting portion 103, a support member 11, and a vertical position adjusting member 12. The regulating member 10 is located between the leno tissue opening mechanism and the reed.

The leno yarn regulating section 102 and the front / rear position adjusting section 1
03 is formed substantially at a right angle. Twine yarn regulation part 1
By changing the bending direction of No. 02, it can be used on both the yarn feeding side and the non-yarn feeding side. The front / rear position adjuster 103 extends in the warp direction and penetrates the support member 11, and is fixed by bolts 104. The vertical position adjustment member 12 is a support, and penetrates the support member 11 in a direction perpendicular to the front / rear position adjustment unit 103. The lower end of the vertical position adjusting member 12 is fixed to a frame of a loom or the like.

Further, the supporting member 11 is
Are fixed to the vertical position adjusting member 12. The front / rear position adjuster 103 and the vertical position adjuster 12 can each arbitrarily select a fixed position with respect to the support member.

The upper leno thread 31 comes into contact with the leno thread regulating portion 102 at the time of opening, and the opening is regulated, whereby the balanced height of the upper warp yarn 21 and the lower warp yarn 22 and the upper leno thread 31 and the lower warp yarn 31 are lowered. It is possible to match the equilibrium height with the leno yarn 32. Further, the leno thread regulating section 102 can change the regulating position of the upper leno thread 31 by the front / rear position adjusting section 103 and the vertical position adjusting member 12. Therefore, it is possible to select a position where the middle point at the maximum opening is equal to the opening of the upper warp yarn 21 and the lower warp yarn 22 and regulate the upper leno yarn 31.

Further, by changing the openings of the upper and lower warps 21 and 22, even if the middle point 25 at the maximum opening moves, it can be freely adjusted in accordance with the change in the equilibrium height accompanying the movement of the middle point 25. The upper leno thread 31 can be regulated. In this embodiment, the structure is adjustable in the up-down direction, the front-back direction, that is, the warp traveling direction.
In consideration of the installation position, etc., only one of the vertical direction and the front-back direction may be provided so as to be adjustable.

In any of the embodiments, a guide portion 101 may be provided at the tip of the twine regulating portion 102. For example, as shown in FIG. 2, the guide portion 101 is formed by bending downward when regulating the upper leno 31 and bending upward when restricting the lower leno 32. good. By providing the guide portion 101, the upper leech thread 31 which is in contact with and is regulated by the leech thread regulating portion 102 does not come off from the leech thread regulating portion 102, and the upper leech thread 31 can be surely regulated. Become.

Further, the regulation of the upper leno yarn 31 has been described in detail. However, the opening positions of the upper warp yarn 21 and the upper leno yarn 31 are substantially equal, and the lower leno yarn 32 is lower than the lower warp yarn 22. When the opening is large on the side, a regulating member 10 for regulating the lower leno 32 can be provided. When the tangling yarn regulating portion 102 is the regulating member 10 that can be adjusted in the vertical direction, an adjusting range that can regulate both the tangling thread 31 on the upper side and the tangling thread 32 on the lower side may be provided.

[0025]

As described above, according to the present invention, the deviation of the balanced height caused by the difference H between the midpoint 25 at the maximum opening of the warp and the midpoint 35 at the maximum opening of the leno is eliminated. The stability of the leno tissue is not destroyed by the difference in tension between the upper and lower threads of the leno thread, and the collapse of the leno tissue and the ear tissue can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a warp and a twine of a first embodiment at the maximum opening.

FIG. 2 is a perspective view of a regulating member with a guide portion.

FIG. 3 is a side view of the warp and the twine of the first embodiment at the maximum opening.

FIG. 4 is a side view of the warp and the twine of the second embodiment at the maximum opening.

FIG. 5 is a perspective view of a regulating member according to a second embodiment.

FIG. 6 is a side view of the conventional warp yarn and twine yarn at the maximum opening.

FIG. 7 is a side view of a conventional warp yarn and a twine yarn at the maximum opening.

FIG. 8 is a sectional view of a weft portion one pick before when a conventional warp or the like has a maximum opening.

FIG. 9 is a perspective view of a conventional warp at maximum opening.

FIG. 10 is a side view of the entangled tissue.

[Explanation of symbols]

 Reference Signs List 2 reed 3 heald frame 4 twine thread opening mechanism 5 dropper box 10 regulating member 11 support member 12 vertical position adjustment member 20 warp balanced height 21 upper warp 22 lower warp 25 middle point of warp opening 30 balanced twine thread height 31 Upper leno thread 32 Lower leno thread 35 Midpoint of the leno thread opening amount 101 Guide part 102 Leno thread regulating part 103 Front and rear position adjustment part 104, 121 Bolt C Woven fabric Y Weft

Claims (2)

[Claims] 1. A weaving machine in which a leno thread is opened by an shedding mechanism provided separately from a warp shedding mechanism to form a leno structure at an end of a woven fabric. A leno tissue collapsing prevention device, comprising a regulating member for regulating the opening of the leno thread in contact with the leno thread. 2. The control member according to claim 1, further comprising a leno thread restricting portion that restricts the opening of the leno thread by contacting the leno thread, wherein the leno thread restricting portion is adjustable in at least one of a vertical direction and a front-rear direction. The entanglement tissue collapse prevention device according to claim 1, wherein the device is provided.