JPH10226945A - Preventing plate for intertexture of tip of weft yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a preventing plate, capable of surely restraining the tip of a weft yarn and preventing the generation of a weaving defect caused by an intertexture thereof in a loom equipped with a stretch nozzle for capturing the tip of the weft yarn, while avoiding an increase in operational cost. SOLUTION: This preventing plate for an intertexture of a tip of a weft yarn, is obtained by fixing the preventing plate 1 for the intertexture, extended toward the warp yarn direction at the reverse side of a main nozzle and the outside of ear of a cloth part or a catch cord, forming a slit 11 in the warp yarn direction on the plate 1 at a frame of a loom, providing a rear end opening part 15 sending forth toward the rear direction on the slit 11 and also a yarn hooking part 13 crossing to the extended direction in the front direction thereof, giving a shape of vertically crossing a virtual plane P containing an advancing locus of the weft yarn during a reed striking process to the yarn hooking part 13. Thereby, on retreating the stretch nozzle together with a reed, the yarn hooking part restrains the tip of the weft yarn becoming free for suppressing the folding back thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weaving prevention plate at the leading end of a weft, and more particularly to an improvement in a weaving prevention technology by catching the leading end of a weft when a reed retreats in a loom having a stretch nozzle for catching the leading end of a weft. Things.

[0002] In this specification, "forward" and "rearward" refer to a cloth winding side and a warp sending side, respectively.

[0003]

2. Description of the Related Art In a loom provided with a stretch nozzle, the stretch nozzle swings back and forth together with the reed, and after the beating, the stretch nozzle moves away from the weave with the retreat of the reed. At this time, the leading end of the weft connected to the cloth comes out of the stretch nozzle. In this state, when the warp is opened for the next weft insertion, the leading end of the weft is folded into the opening, and if it is woven as it is, a weaving defect is formed.

Therefore, in order to prevent such weaving, in addition to the conventional stretch nozzle, a tuft extending nozzle which jets an air stream toward the weft end is used.
Proposed devices such as 3-275747 and Japanese Utility Model Laid-Open No. 64-37484 are known.

[0005]

However, when such a tuft extending nozzle is used in addition to the stretch nozzle,
Therefore, there is a problem that the air consumption increases and the operating cost increases.

SUMMARY OF THE INVENTION In view of the circumstances of the prior art, an object of the present invention is to avoid the increase in operating cost in a loom having a stretch nozzle for capturing the weft end, and to reliably restrain the weft end to incorporate the weft. The purpose of the present invention is to prevent the occurrence of a fabric defect.

[0007]

For this purpose, in the present invention, a weaving prevention plate extending in the warp direction on the opposite side of the main nozzle from the cloth lugs or the outside of the catch cord is fixed to the loom frame. A slit in the warp direction is formed in the slit, and a rear end opening diverging rearward is provided in the slit, and a thread portion intersecting with the extending direction is provided in front of the slit, and the thread portion is used in a beating process during the beating process. The gist of the present invention is to provide a shape that crosses the virtual plane including the weft forward trajectory up and down.

[0008]

[Function] When the stretch nozzle retreats with the reed,
The free end of the weft is restrained by the binding portion, thereby suppressing its folding.

[0009]

FIG. 1 shows an example of a structure around a weaving prevention plate according to the present invention. The reed unit 3 provided with the reed 31 swings forward from the last retreat position II to the beating position I (most forward position), and in this beating process, the weft is also pushed by the reed 31 and advances. The weaving prevention plate 1 extending in the warp direction is fixed to a frame of a loom (not shown) by a bracket 5.

As shown in FIG. 2, the weaving prevention plate 1 has a slit 11 extending in the warp direction. The slit 11 has an opening 15 diverging rearward at the rear end. Further, a yarn threading portion 13 intersecting with the extending direction is provided in front thereof. The weaving prevention plate 1 is supported by the bracket 5 so that the thread portion 13 includes a beating point shown in the drawing.

Further, the yarn engaging portion 13 has a shape that vertically crosses an imaginary plane P (shown in FIG. 1) that includes the advance locus of the weft in the beating process. As an aspect of this crossing,
Narrow angle θ between the thread portion 1 and the direction in which the slit 11 extends rearward.
However, either the case of 90 degrees as shown in FIG. 3 or the case of an acute angle as shown in FIG. 4 may be used, but in the case of the acute angle, the weft tip is more reliably captured.

The length of the slit 11 does not necessarily have to extend over the entire length of the weaving prevention plate 1 in the front-rear direction, but is determined by the point at which the weft is cut between the cloth end and the catch cord after beating. However, since the cutting of the weft is generally performed after passing through the weaving prevention plate of the present invention, the slit 11 is formed over the entire length as shown in the drawing, and the weft passes through the slit 11 as the cloth is wound. It is desirable to make.

When the stretch nozzle retreats together with the reed after beating, the weft leading end comes out of the stretch nozzle and becomes free. However, at this time, the weft is restrained by engagement with the weaving portion of the weaving prevention plate, and its folding is suppressed. Is done.

[0014]

According to the present invention, the free end of the weft is constrained by the binding portion and its folding is suppressed, so that the weft end is not woven into the opening at the next opening, and the occurrence of a weaving defect due to the weaving is reduced. Is prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration around a weaving prevention plate of the present invention.

FIG. 2 is a side view showing a relationship between a weaving prevention plate, a warp, and a weft.

FIG. 3 is a side view showing an example of a yarn engaging portion.

FIG. 4 is a side view showing another example of the yarn engaging portion.

[Explanation of symbols]

 1: weaving prevention plate 11: slit 13: threading portion 15: rear end opening 3: reed unit 31: reed 5: bracket T: warp W: weft

Claims (2)

[Claims] 1. A slit extending in a warp direction and fixed to a loom frame on a side opposite to a main nozzle and outside a cloth ear or a catch cord, and has a slit extending in a warp direction. A rear end opening that diverges toward the front end and a yarn intersecting with the extending direction in front of the rear end opening. A weft-end weaving prevention plate characterized by a transverse shape. 2. The prevention plate according to claim 1, wherein the engaging portion extends at an included angle of 90 degrees or less with respect to a rear extending direction of the slit.