JP2002266203A - Apparatus for regulating weft end in shuttleless loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an appearance good and to provide a tightened woven fabric edge in the weft-insertion side or the woven fabric edge at the weft-insertion side by equalizing the lengths of the weft ends. SOLUTION: A regulating member 13 (12) for regulating the movement of the weft yarn 5 in the upstream direction of warp yarns 8 accompanied with the retreat of a reed 4 by protruding in the upstream direction of the warp yarns 8 from the weft yarns 5 connecting between the woven fabric 2 and a holding member 6 (6a), and engaging with the weft yarns 5 between the tip of the weft yarn 5 at the upstream side of a cutting region of a cutter 7 and the extended line of cloth fell 3 of the reed 4 at the most retreated time is installed in a shuttleless loom 1 capable of cutting the edge part of the weft yarns 5 held by the holding member 6 (6a) at the position between the woven fabric 2 and the holding member 6 (6a) after plural times of weft-insertion while holding the end parts of the weft yarns 5 after being beaten by the reed 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling the movement of the end of a weft in a shuttleless loom after inserting a weft and then beating the weft after retreating the reed.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 61-146846 discloses that
A weft cutting device for a shuttleless loom is disclosed. FIG. 1 shows a main part of the shuttleless loom 1 after rewriting the weft cutting device of the shuttleless loom of the above publication as a shuttleless loom 1 which is a premise of the present invention. The shuttleless loom 1, after holding the end of the weft 5 beaten by the reed 4 with respect to the weave 3 of the woven fabric 2 by an example of the holding member 6 while holding the end by the warp 6 a, after wefting a plurality of times, The end of the weft 5 held by the waste warp 6a between the cloth 2 and the waste warp 6a is cut by the cutter 7.

[0003] The cutter 7 comprises an end of the woven fabric 2 and a discarded warp 6a.
By cutting the weft 5 with a pair of scissors that open at the upstream side of the warp 8 (the side where the warp 8 is sent out),
A weft piece 5a is formed, and a discard ear 9 is formed by the weft piece 5a and the discard warp 6a, and an ear chamber 5b is formed at an end of the woven fabric 2. Discard ear 9 (weft piece 5a and discard warp 6a)
Is guided by the yarn guide 11 and the false twist spindle 21
Is twisted and discarded. The false twist spindle 21 is driven by the discard ear false twist device 20.

[0004]

In the above technique, the number of uncut weft yarns 5 after beating changes, so that the ear chamber 5b
Are irregular, and the woven fabric 2 becomes a poor-looking woven fabric. That is, due to the bumping phenomenon,
The woven cloth 2 in the vicinity of the weave 3 bends and waves, and after the beating, the weave 3 retreats against the beating force, but the retreat amount at that time is not constant, and the weaving cycle is not performed. It fluctuates every time. For this reason, the uncut weft 5 on the opening side of the cutter 7
Changes in number. In particular, this bumping phenomenon appears strongly in high-density fabrics.

Since the cutter 7 is of a scissors type, the weft 5
Is pushed by the fixed blade 7a and the movable blade 7b of the cutter 7 and moves out of the cutting area of the cutter 7, so that the cutting may not be performed. For this reason, the number of cut wefts in one cut varies, and the number of uncut wefts 5 after beating changes.
When the number of uncut wefts 5 is small, the tension applied to one weft 5 by weaving shrinkage increases, and the gripping force of the discarded warp 6a cannot be supported. Shift. Since the end of the woven fabric 2 is cut in a state moved to the weft insertion side, the ear chamber 5b of the woven fabric 2 becomes longer. On the other hand, when the number of uncut wefts 5 is large,
Becomes shorter on the contrary.

The weft yarn 5 is held and restrained by the discarded warp yarn 6a. However, depending on the type of the woven fabric, the holding force is weak, and the woven fabric 2 at the end of the woven fabric cannot be cut by the cutter 7 or tightened.

Accordingly, an object of the present invention is to make the weft ends uniform at the weft insertion side or the non-weft insertion side, improve the appearance, and obtain a tight woven cloth end. It is to be.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned object, the present invention relates to a shuttleless loom, in which a weft is held between a woven fabric and a weft holding member downstream of the warp before the last retreat of the reed. Further, a weft regulating member is provided upstream of the cutting area of the cutter. With this regulating member, it is possible to regulate the movement of the weft to the upstream along with the retreat of the reed, so that the number of uncut wefts is constant, the ear chambers of the woven fabric are aligned to a certain length, and the weaving when the reed retreats. Between the front and the regulating member, the weft can be bent to increase the weft tension and form a tight woven cloth end.

More specifically, the weft end regulating device for a shuttleless loom according to the first aspect of the present invention provides a weft-end regulating device which holds the end of a beaten beft by a holding member after a plurality of weft insertions. In a shuttleless loom in which the end of the weft held by the holding member is cut by a cutter between the members, the cutter protrudes in the upstream direction of the warp than the weft connected between the woven fabric and the holding member, and cuts the cutter. Regulation that engages with the weft between the upstream end of the weft in the area and the extension line before weaving when the reed retreats to prevent the weft from moving in the upstream direction of the warp as the reed retreats A member is provided.

A weft end regulating device for a shuttleless loom according to claim 2,
The regulating member is constituted by a weft hook, and at the upper end surface of the weft hook, a weft engaging portion that prevents the beaten weft from moving to the upstream side of the warp, and a weft engaging portion that is low at the upstream side of the warp. It has a guide surface that slopes high on the side. In claim 3, the regulating member is provided so as to be adjustable in position in the warp direction, and in claim 4, the regulating member is provided so as to be adjustable in vertical direction.

[0011]

FIG. 2, FIG. 3 and FIG. 4 show a weft end regulating device 10 of a shuttleless loom according to the present invention. The weft end regulating device 10 of the shuttleless loom is based on the shuttleless loom 1 similar to that of FIGS. 1 and 2 described above. 2 and 3,
The shuttleless loom 1, after holding the end of the weft 5 beaten by the reed 4 with respect to the front 3 of the woven fabric 2 by the reed 4 as an example of the holding member 6, after weft insertion a plurality of times, The end of the weft 5 held by the waste warp 6a between the cloth 2 and the waste warp 6a is cut by the cutter 7.

The weft end regulating device 10 for a shuttleless loom according to the present invention is the same as the shuttleless loom 1 described above.
Three. The restricting member 13 protrudes in the upstream direction of the warp 8 from the weft 5 continuing between the woven fabric 2 and the discarded warp 6a, and the upstream end of the weft 8 in the cutting area of the cutter 7 and the last retreat of the reed 4 It engages with the weft 5 on the extension of the weave 3 and regulates the movement of the weft 5 in the upstream direction of the warp 8 as the reed 4 retreats.

Here, the cutting area of the cutter 7 is a portion where the cutting lines of both blades (the fixed blade 7a and the movable blade 7b) of the cutter 7 intersect with each other if the cutter 7 is a scissor type cutter. In the case of a vertically movable cutter, both blades of the cutter 7 (the fixed blade 7a and the movable blade 7a) are used.
b) refers to the portion where the blade lines contact each other. Of course, as already apparent, the upstream of the warp 8 is the upstream side in the flow of the warp 8 as the weaving progresses, and is the same as the delivery side of the warp 8. In addition, the cutter 7 is the cutter bracket 2
2, the movable blade 7b is driven by a movable blade drive shaft 23.

As seen in FIG. 4, the regulating member 13 is
As a whole, it is constituted by a strip-shaped weft hook 12, protrudes above the weft 5 connected between the woven fabric 2 and the discarded warp 6a, has a weft engaging portion 14 on the upper end surface, and A portion protruding in the upstream direction has a guide surface 15 which is low at the tip and is inclined high at the weft engaging portion 14. The weft hook 12 has, for example, two mounting holes 1
Two mounting bolts 18, 19 inserted into 6, 17
Thereby, a suitable member, for example, the side surface of the fixed blade 7a of the cutter 7 is attached at a predetermined position.

After the weft yarn 5 has been inserted, it is beaten by the reed 4, contacts the guide surface 15 of the weft hook 12, is guided by it, and reaches the beat point near the weave 3. The inserted weft 5 moves along the guide surface 15 of the weft hook 12 as the beating and weaving progress, and is locked by the weft engaging portion 14 of the weft hook 12. In this way, the weft 5 reaches the cutting area of the cutter 7 as the weaving progresses while forming a group of uncut wefts 5 together with the subsequent weft 5, where the fixed blade 7a and the movable blade 7b of the cutter 7 are arranged.
Is cut by The end of the cut weft 5 is
Form an ear chamber 5b.

The cutter 7 comprises an end of the woven fabric 2 and a discarded warp 6a.
Then, the weft 5 is cut to create a weft piece 5a. As a result, the ear tuft 5b is formed at the end of the woven fabric 2, and the weft piece 5a and the waste warp 6a form the discard ear 9. Discard ear 9 (weft piece 5a and discard warp 6
a) is guided by the yarn guide 11 and is false-twisted by the rotation of the false-twisting spindle 21 to be discarded.

After the reed 4 retreats, the front 3 of the woven fabric 2 tends to move to the upstream side of the warp 8 due to the rebound of the woven fabric 2 against beating. The group of uncut wefts 5 moves to the upstream side of the warp 8, but together with the adjacent uncut wefts 5, the upstream side of the cutting area and the weft engaging portion 14 of the weft hook 12 projecting above the weft 5. Contact and engage. Due to this engagement, the movement of the weft 5 to the upstream side of the warp 8 is prevented, and a predetermined number of uncut wefts 5 stop at the cutting area of the cutter 7 and are cut there.

In the case of the scissors-type cutter 7 in particular, a predetermined number of uncut wefts 5 reaching the cutting area are pushed by the fixed blade 7a and the movable blade 7b of the cutter 7 and escape upstream of the warp 8. However, similarly, the movement of the weft hook 12 is hindered by the weft engaging portion 14 and is maintained in the cutting area and cut.

Since a predetermined number of weft yarns 5 are cut each time (in a normal woven fabric, one is a predetermined number for each weaving cycle), the number of uncut weft yarns 5 is constant, and is always constant. The woven fabric 2 is pulled against the shrinkage of the weave by the uncut weft 5 of the above. Therefore, the end position of the woven fabric 2 at the cutting position is always a fixed distance from the cutter 7. As a result, the uncut weft yarn 5 is cut and formed as an ear chamber 5b having a fixed length from the end of the woven fabric 2, and the woven fabric 2 has a good appearance. In addition, since the weft 5 is bent at the position of engagement with the weft hook 12, the tension between the woven fabric 2 and the weft hook 12 is increased, and the woven fabric 2 having a tight woven fabric end can be obtained.

In the weft hook 12 shown in FIG. 4, the two mounting holes 16 and 17 are long in the direction of the warp 8. Thereby, the position of the weft engaging portion 14 and the guide surface 15 of the weft hook 12 can be adjusted in the direction of the warp 8 according to the weaving conditions, and their operating positions are changed. Reed 4
Since the position of the weave 3 at the time of the last retraction changes depending on the weaving conditions, the optimum position of the weft engaging portion 14 changes, but the weft hook 12 can cope with the change. Normally, before weaving 3 of the high-density woven fabric, the upstream (delivery) of the warp 8
Side.

FIG. 5 shows another specific example of the weft hook 12 as the regulating member 13. As shown in FIG. In the weft hook 12 shown in FIG. 5, the mounting hole 16 on the side of the weft engaging portion 14 is a long hole in the vertical direction. For this reason, the weft hook 12 is rotatable around the other mounting hole 17 with the mounting bolt 18 loosened, and the weft engaging portion 14 and the guide surface 15 are positioned in the vertical direction according to the weaving conditions. It is provided to be adjustable. When the weft hook 12 is moved in the protruding direction, when the weft 5 passes through the guide surface 15, it is greatly bent, the tension of the weft 5 after passing is reduced, and the weft 5 is damaged by friction, and the cutter 7 Before reaching the cutting area, there is a risk that the weft 5 is cut, but the movement of the uncut weft 5 can be more completely regulated, the bumping phenomenon is severe, and even if the weave 3 moves up and down, Regulation becomes possible.

FIG. 6 shows another specific example of the weft hook 12 as the regulating member 13. In FIG. 6, the weft hook 12 is formed integrally with the tip of the fixed blade 7a of the cutter 7 on the upstream side (delivery side) by the same member.

The regulating member 13 is usually provided on the side opposite to the weft insertion side, but may be provided on the side of weft insertion. Control member 13
Is provided on the weft insertion side, the cutter 7 on the weft insertion side is provided separately from the yarn feeding cutter for cutting the weft 5 from the weft insertion means such as a weft insertion nozzle. In addition, the regulating member 13
The (weft hook 12) may be provided with the weft engaging portion 14 facing downward.

Further, the regulating member 13 may be provided on either side of the woven cloth 2 or the holding member 6 with respect to the cutter 7. When the regulating member 13 is provided on the holding member 6 side, the tension of the weft 5 is increased between the regulating member 13 and the woven fabric 2, and the occurrence of cutting errors is eliminated. When the regulating member 13 is provided on the woven fabric 2 side, the tension of the weft 5 increases between the regulating member 13 and the woven fabric 2, and the end of the woven fabric 2 is further tightened.

The holding member 6 at the end of the beaten weft 5
Is not limited to the discarded warp 6a, but may be configured as a fluid type in which the weft 5 is pulled by a fluid and the cut weft pieces 5a are transported by the fluid.

[0026]

According to the first aspect, in the shuttleless loom,
The regulating member engages with the weft between the upstream end of the weft in the cutting area of the cutter and the extension line before weaving when the reed is retreated,
Since the movement of the weft in the warp upstream direction is restricted with the retreat of the reed, the position of the woven fabric end at the cutting position is always a fixed distance from the cutter. As a result, a fixed length ear lobe is formed from the end of the woven fabric, and the woven fabric has a good appearance. In addition, since the weft bends at the point of engagement with the regulating member,
Tension increases between the woven fabric and the regulating member, and a woven fabric having a tight woven fabric end can be obtained.

According to the second aspect, the regulating member has a weft engaging portion at the upper end surface for preventing the beaten weft from moving to the upstream side of the warp, and a weft engaging portion which is low at the upstream side of the warp. It has a guide surface that is inclined high on the part side. For this reason, the inserted weft is guided on the guide surface of the regulating member as the beating and weaving progress, and reliably reaches the weft engaging portion of the regulating member.

According to the third aspect, since the regulating member is provided so as to be adjustable in the direction of the warp, the position of the weft engaging portion can be set to an optimum position according to the weaving conditions.

According to the fourth aspect, since the regulating member is provided so as to be adjustable in the vertical direction, the vertical position of the weft engaging portion can be set to an optimum position in accordance with the weaving conditions, and the bumping phenomenon can be prevented. Even if the weaving front moves up and down, the weft can be regulated.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a conventional shuttleless loom 1. FIG.

FIG. 2 is a plan view of the weft end regulating device 10 of the shuttleless loom of the present invention.

FIG. 3 is a side view of the weft end regulating device 10 of the shuttleless loom of the present invention.

FIG. 4 is a side view of the weft hook 12 as the regulating member 13.

FIG. 5 is a side view of another weft hook 12 as a regulating member 13.

FIG. 6 is a side view of another weft hook 12 as a regulating member 13.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shuttleless loom 2 Woven cloth 3 Weaving 4 Reed 5 Weft 5a Weft piece 5b Ear tuft 6 Holding member 6a Discarded warp 7 Cutter 7a Fixed blade 7b Movable blade 8 Warp 9 Discard ear 10 Weft end regulating device of shuttleless loom 11 Yarn guide DESCRIPTION OF SYMBOLS 12 Weft hook 13 Restriction member 14 Weft engaging part 15 Guide surface 16 Mounting hole 17 Mounting hole 18 Mounting bolt 19 Mounting bolt 20 Discard ear false twist device 21 False twist spindle 22 Cutter bracket 23 Movable blade drive shaft

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[Procedure amendment]

[Submission date] March 16, 2001 (2001.3.1.
6)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Keiichi Nagi 5-18-18 Nomachi, Kanazawa City, Ishikawa Prefecture Tsudakoma Industry Co., Ltd. F-term (reference) 4L050 AA11 CB08 CB10 CB25 CB27 CB98

Claims (4)

[Claims] An end of a weft held by a holding member is cut between a woven fabric and a holding member after a plurality of weft insertions while holding the end of the beaten weft by a holding member. In the shuttleless loom that is cut by the weft, the protruding yarn is projected in the upstream direction of the warp than the continuous weft between the woven fabric and the holding member, and is on the extension line of the upstream end of the weft in the cutting area of the cutter and before weaving when the reed retreats last. A weft end regulating device for a shuttleless loom, characterized in that a regulating member is provided which regulates the movement of the weft in the upstream direction of the warp as the reed retreats. 2. A weft hook comprising a weft hook, an upper end surface of the weft hook, a weft engaging portion for preventing a beaten weft from moving upstream of the warp, and a weft hook at an upper end of the warp. 2. The weft end regulating device for a shuttleless loom according to claim 1, further comprising a guide surface that is low and is inclined high on the side of the weft engaging portion. 3. The weft end regulating device for a shuttleless loom according to claim 1, wherein the regulating member is provided so as to be adjustable in position in the direction of the warp. 4. The weft end regulating device for a shuttleless loom according to claim 1, wherein the regulating member is provided so as to be vertically adjustable.