JP2544556Y2 - Weft tension applying device for fragment loom - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft tension applying device for a fragment loom, and more particularly, to a wavy end of a weft inserted in a fragment loom such as a fluid jet loom in cooperation with a reed. The tension is applied by bending the yarn, and the leading end of the weft to which the tension is applied is released by the retreating movement of the reed and is prevented from bouncing.

[0002]

2. Description of the Related Art In a fragmentary loom, since the weft is in a free state when it is inserted, it is necessary to apply tension to the beating operation and the detection of the weft properly. For this purpose, a weft tension applying device with a tension plate as the main part is provided on the non-yarn feeding side, and the leading end of the weft is bent in a wavy shape by allowing the tension play to enter between the reed wings that move forward during beating. In this case, tension is applied.

[0003]

However, when the reed enters a retreating motion after beating, the weft returns to a free state, and the weft leading end loses its tension and rebounds. When the leading end of the weft rebounds in this way, the rebounded weft is driven in that state at the time of the next beating. If the weft driving in such a slack state overlaps, the appearance of the texture is disturbed, which is not preferable in maintaining the quality of the fabric. In addition, since the weft that has lost tension is in an unstable state, the weft detection feeler does not work properly, or the weft that rebounds enters the feeler, resulting in a malfunction of the weft detection and a reduction in the operating rate of the loom. .

[0004] In order to avoid such inconveniences, various proposals have been made to catch the leading end of the weft inserted. The invention disclosed in Japanese Utility Model Laid-Open Publication No. 48-94967 also relates to a tension applying device which applies a tension to a weft by bending a weft-inserted weft tip in a wavy shape in cooperation with a reed. In the above, a suction pipe by air is provided as a yarn catcher on the yarn supplying side further opposite to the tension applying device. But with this structure,
A suction source, a pipe for a suction pipe, and the like are required, and the structure is inevitably complicated and expensive. In addition, since the air suction function is used, there is a problem that the locking of the leading end of the weft lacks certainty.

In addition, in the invention disclosed in Japanese Utility Model Laid-Open No. 1-119078, a yarn catcher is disposed further on the side opposite to the yarn supplying side than the catch cord, and the yarn catcher is opened and closed. However, even in the case of the prior application, there is a disadvantage that the structure is complicated and expensive, and it is difficult to follow the speeding-up of the loom because of the opening and closing drive.

An object of the present invention is to provide a weft tension applying device of a type in which a weft inserted leading end of a weft is bent in a wavy shape in cooperation with a reed to apply tension to the weft, and the weft is inserted with a simple and inexpensive structure. An object of the present invention is to reliably prevent the weft from bouncing.

[0007]

According to the present invention, there is provided a weft tension applying apparatus for bending the leading end of a weft inserted weft in cooperation with a reed to apply tension to the weft, The gist of the present invention is to provide a yarn catcher having at least one saw-toothed weft locking portion on the edge of a guide groove formed in the warp direction on the side opposite to the yarn supplying side of the tension applying device.

[0008]

The inserted weft is pushed by the reed advancing and contacts the tension plate of the weft tension applying device, and enters the weft guide groove of the yarn catcher. When the reed moves further, the tension plate cooperates with the reed to bend the weft in a wavy manner and apply tension to the weft. At the same time, the reed guides the weft to the saw-shaped weft retaining portion at the back of the weft guide groove of the yarn catcher. When the beating is completed and the reed begins to retreat, the weft is released from tension and tends to bounce off. However, the weft is prevented from engaging with the serrated weft locking portion and cannot bounce.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a yarn weaving side end of a fragmentary loom, and a yarn guide plate 4 is provided at a position facing a reed 6 so as to extend in the weft direction. The invented weft tension applying device 10 is attached to the yarn guide plate 4. A well-known weft detecting device 3 is provided on the yarn supplying side of the weft tension applying device 10 as appropriate. The inserted weft W flies between the catcher cord 7 and the warp 5 in the open state, and is first detected by the weft detecting device 3 when passing through the weft detecting device 3, and is supplied to the weft tension applying device. It is driven into the woven fabric 2 by the reed 6 which passes in front of and then moves forward.

In the illustrated example, the weft tension applying device 1
Numeral 0 denotes two curved plate-shaped tension plates 12 arranged side by side.

FIG. 2 shows an example of the yarn catcher 11 according to the present invention. The yarn catcher 11 comprises a mounting portion 111 and a yarn catching portion 112 which intersect with each other substantially orthogonally. Is the weft catching section 1
Numerals 12 respectively extend in the warp direction. Mounting part 111
A long hole 113 is formed in the longitudinal direction, and is fixed to the yarn guide plate 4 so as to be adjustable in the weft direction by a mounting bolt 13 inserted therein as shown in FIG.

The yarn catching section 112 has a weft guide groove 1 in the warp direction.
The opening facing the reed 6 is defined by the yarn guide edges 116 facing up and down. The serrated weft engaging portion is provided so as to protrude into the weft guiding groove 114. In the illustrated example, one serrated engaging portion is provided on the upper edge of the weft guiding groove 114 and two on the lower edge. 118 are formed.

However, the arrangement of the serrated weft engaging portion 118 is not limited to this. For example, as shown in FIG. 3, only one serrated weft engaging portion 118 is provided at the lower edge of the weft guiding groove 114. It may be formed. In short, in order to obtain the effect of the present invention, at least one saw-toothed weft engaging portion 118 is provided at least on the lower edge of the weft guide groove 114.
It is only necessary that a is formed.

In the above construction, the inserted weft is pushed by the reed 6 which is moved forward and comes into contact with the weft tension applying device 10, and is guided by the yarn guide edge 116 of the yarn catcher 11 while being guided by the weft. It enters the groove 114.
When the reed moves further, the tension plate 12
Penetrates and bends the weft W in a wave shape to apply tension to the weft W. At the same time, the weft W is reeded by the reed and the yarn catcher 11
Is guided to the serrated weft retaining portion 118 at the back of the weft guide groove 114. When the beating is completed and the reed 6 starts to retreat, the tension plate 12 also retreats from between the reeds, and the weft W is released from the tension. At this time, the weft W tries to bounce, but the weft guide groove 114 of the yarn catcher 11
It is prevented from engaging with the serrated weft engaging portion 118 inside and cannot bounce.

In the above-described example, the yarn catcher 11 is provided on the side opposite to the yarn supply side of the weft tension applying device 10, but the present invention is not limited to this. The yarn catcher 11 may be provided at a predetermined interval from the most counter yarn supply side of the weft tension applying device 10.

[0016]

[Effect of the invention] Since the recoil of the inserted weft can be reliably prevented, the reliability of the detection of the weft is greatly improved, the operating rate of the loom is also improved, and the driving of the weft in the rebound state is eliminated. In addition, since the weft tension applying device eliminates the disorder of the texture of the woven fabric and the slack of the ear tissue, the quality of the woven fabric is preferably maintained. Furthermore, since it is only necessary to use a plate-shaped immovable member for the yarn catcher, the structure is simple and inexpensive, there is no movable part requiring driving, and therefore, it is possible to cope with a high speed loom without any problem. .
In addition, by providing a long hole in the weft direction in the plate-like stationary member, the mounting position of the yarn catcher corresponding to the length of the leading end of the weft can be easily adjusted,
Bounce of the leading end of the weft can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the periphery of a non-feed side end of a loom using a weft tension applying device of the present invention.

FIG. 2 is a perspective view showing an example of a structure of a main part of the weft tension applying device.

FIG. 3 is a perspective view showing another example of the structure of the main part of the weft tension applying device.

[Explanation of symbols]

 2 woven cloth 3 weft detecting device 4 yarn guide plate 5 warp 6 reed 10 weft tension applying device 11 yarn catcher 111 mounting portion 112 yarn catching portion 114 ...... Weft guide groove 116 ... Yarn edge 118 ... Serrated weft locking part

Claims (1)

(57) [Scope of request for utility model registration] 1. A weft tension applying device in which a weft-inserted weft leading end is bent in a wave shape in cooperation with a reed to apply tension to a weft, and a warp is provided on a non-supply side of the weft tension applying device. A yarn catcher having at least one saw-toothed weft retaining portion provided on an edge of a guide groove extending in the direction of the weft;