JPH02269833A - Weft inserter for air-jet weaving machine - Google Patents

Abstract

PURPOSE:To obtain the title inserter of high duration and excellent weft- inserting performance by setting a specific stationary air guide between adjacent warps. CONSTITUTION:Stationary air guide 8 for guiding wefts between the adjacent warps is set so that the reed comes side by side with the air guide in the warp lines. The cross section on the inlet side of the weft guide path 8a is made larger than that of the front part of the air guide and the guide path 8a is tapered toward the weft inserting direction.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a weft insertion device for an air injection loom that performs multi-width weaving.

<Conventional technology> Conventionally, when weaving fabrics of multiple widths with multiple warp rows adjacent to each other in an air-jet loom, weft insertion is performed using a weft insertion nozzle provided on one side of the weft, which moves integrally with the reed. Although the weft is guided by an air guide (containing a special liquid) together with jetted air for weft insertion, a tuck-in selvage assembly device for the middle selvage may be provided between adjacent warp rows.

In such a case, an interference prevention device is provided in the air guide between adjacent warp rows so that the air guide does not interfere with the tuck-in selvedge assembly device during reed beating (see Japanese Utility Model Publication No. 62-41082).
(see publication).

In this interference prevention device, one end of the air guide is rotatably attached to the thread sword, biased to the weft guide position by a spring, and the air guide hits a stopper and retreats in the backward direction during beating. be.

<Problems to be Solved by the Invention> However, in such conventional devices, the air guide between the pure series hits the stopper and is retracted in the backward direction. Therefore, there was a need to improve durability.

For this reason, as a result of intensive study, the inventor of the present invention came up with the idea of providing a fixed air guide between adjacent pure series so that it lines up with the air guide in the warp row when the reed comes near the most retracted position. However, with a simple fixed air guide, when the weft leaves the weft guide path by the air guide in the warp row and enters the weft guide path by the fixed air guide between the pure series, there will be a slight deviation between the weft guide paths. This, combined with the turbulence of the airflow, can cause the tip of the weft thread to get caught on the inlet side of the fixed air guide or to jump out of the weft guide path, resulting in poor weft insertion, and there is still room for improvement. there were.

In view of the above circumstances, it is an object of the present invention to provide a weft insertion device that uses a fixed air guide system with good durability and has improved weft insertion performance.

<Means for Solving the Problems> For this reason, the present invention makes a plurality of warp rows adjacent to each other, and guides the weft threads together with a static electricity jet for weft insertion by means of an air guide that moves integrally with the reed to weave fabrics of multiple widths. In the weft inserting device of an air-injection loom, a weft guide passage of a fixed air guide is provided between adjacent pure rows so that it lines up with the air guide in the warp row when the reed comes near the most retracted position, The cross-sectional area of the weft inlet side of the weft guide passage of this fixed air guide is made larger than the passage cross-sectional area of the air guide in front of it, and the weft guide passage is made substantially tapered at the tip in the weft insertion direction. It has a configuration in which it is formed on a taber.

<Function> In the above configuration, the air guide between the pure series is fixed and functions as a weft guide during weft insertion along with the air guide in the warp row near the most retracted position of the reed. Not only can interference with auxiliary weaving equipment such as a tuck-in selvedge device to be prevented from occurring when the reed moves forward, but also durability can be improved.

In addition, during weft insertion, when the weft exits the weft guide path by the air guide in the warp row and enters the weft guide path by the fixed air guide between the pure series, the weft inlet side of the weft guide path of the fixed air guide. The passage cross-sectional area is made larger than that of the air guide in front of it, and the weft guide passage of the fixed air guide is formed into a tapered shape that tapers in the weft insertion direction, so that the weft You can insert the weft smoothly without fear of the tip getting caught in the entrance.

<Example> Embodiments of the present invention will be described below based on the drawings.

Referring to FIG. 3, when weaving two widths of woven fabrics 2A and 2B with warp rows 1A and 1B adjacent to each other, weft insertion nozzle 3 provided on one side or an auxiliary nozzle (not shown) may be used. , the weft thread 4 is inserted. During this weft insertion, the air guides 6A and 6B, which move integrally with the reeds 5A and 5B, guide the weft thread 4 together with the jet air for weft insertion, but between the adjacent warp rows 1A and 1B Since a tuck-in selvage device 7 for the middle selvage is provided, the weft 4 is guided by another fixed air guide 8 between the adjacent warp rows 1A and 1B.

Referring to FIGS. 1 and 2, an appropriate number of thread swords 1 are mounted on a thread sword shaft 9 that makes reciprocating angular movements in conjunction with the main shaft of the loom.
0 are fixed, and a reed holder 11 is fixed to the upper ends of these. The reed holder 11 has warp rows 1A and 1B.
Reeds 5A and 5B are attached in correspondence with each other. These reeds 5A.

5B, liquids are arranged side by side, and recesses are formed on the fabric side of each liquid, and the rows of the recesses form air guides 6A, 6B.

In addition, a stay 14 is fixed by bolts 13 to an angle member 12 passed between the frames of the loom, and this stay 14
A bracket 16 is fixed to 4 with bolts 15. A fixed air guide 8 is fixed to the bracket 16 with bolts 17.

This fixed air guide 8 is located between the warp rows 1A and 1B, and when the reeds 5A and 5B reach the most retracted position, the warp rows 1A and 1B
It is arranged to line up with air guides 6A and 6B in 1B.

The fixed air guide 8 is block-shaped and has a groove extending in the weft insertion direction, which serves as a weft guide passage 8a. The cross-sectional area of the weft inlet side of this weft guide passage 8a is made larger than that of the air guide 6A in front thereof, and a tapered tapered end is formed in the weft guide passage 8a in the weft insertion direction. It is. Note that the taper may not be provided over the entire length, but only on the inlet side, and the outlet side may be straight. Further, the passage cross-sectional area on the exit side is made equal to or smaller than the passage cross-sectional area of the rear air guide 6B.

Next, the effect will be explained.

Weft insertion is performed when the reeds 5A and 5B are retreated by the thread sword 10, but at this time, the air guide 6 of the reeds 5A and 5B
A, 6B and a fixed air guide 8 are lined up in the weft insertion direction, and between the air guides 6A and 6B, the fixed air guide 8 guides the weft 4 together with the jet air for weft insertion from the weft insertion nozzle 3, and inserts the weft. Have them do it.

At this time, the weft 4 that has exited the weft guide path by the air guide 6A of the reed 5A is transferred to the weft guide path 8 by the fixed air guide 8.
When entering a, the weft guide passage 8a of the fixed air guide 8
The cross-sectional area of the passage on the weft entrance side is the air guide 6A in front of it.
Since the weft guide passage 8a of the fixed air guide 8 has a taper that tapers in the weft insertion direction, there is no fear that the tip of the weft will get caught in the entrance. You can insert the weft smoothly.

Next, the reeds 5A and 5B move forward together with the thread sword 10 to perform reed beating, but at this time, the fixed air guide 8 between the warp rows 1A and 1B remains as it is, so interference with the tuck-in selvedge assembly device 7 is avoided. It will be done.

FIG. 4 shows another embodiment.

In this embodiment, the fixed air guide 8 is not formed in a block shape, but is formed by arranging members having substantially the same width as the liquid state at predetermined intervals in the weft insertion direction. Which one to select is determined by considering the stability of the airflow depending on the presence or absence of leakage flow from the gap, including the relationship with the auxiliary nozzle.

FIG. 5 shows yet another embodiment.

In this embodiment, the passage cross-sectional area on the weft entrance side of the weft yarn guide passage to the air guide 6 following the fixed air guide 8 is set to be larger than the passage cross-sectional area on the weft exit side of the weft yarn guide passage of the fixed air guide 8 in the preceding position. It is made larger and has a taper that tapers in the weft insertion direction. In this way, weft insertion can be performed more smoothly.

In addition to the above-mentioned embodiments, the term "taber whose tip is substantially tapered in the weft insertion direction" as used herein refers to a tapered material in which the cross-sectional area of the weft guide passage of a fixed air guide gradually decreases, etc. This is a general term for items that have the effect of preventing weft insertion errors.

<Effects of the Invention> As explained above, according to the present invention, since a fixed air guide is provided between the warp rows, it is possible to prevent interference with weaving auxiliary equipment such as the tuck-in selvedge assembly device during reed beating, and also to prevent Even if the speed is increased, sufficient durability can be obtained, and weft insertion can be performed reliably.

[Brief explanation of drawings]

Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2 is a front view of the main parts of the same as above, Fig. 3 is an overall plan view of the same as above, and Fig. 4 is a front view of main parts of another embodiment. , FIG. 5 is a front view of main parts showing still another embodiment. 1A, 1B... Warp 2A, 2B... Woven fabric 3
...Weft insertion nozzle 4...Weft thread 5A, 5B.
... Reed 6A, 6B... Air guide 7... Tuck-in ear assembly device 8... Fixed air guide 8a...
・Weft guide passage patent applicant Nissan Motor Co., Ltd. Representative Patent attorney Fujio Sasashima, IB...Warp 2A, 2B...Woven fabric 5A, 5B...Reed 6A, 6B...Air guide 8 ...Fixed air guide Figure 1

Claims (1)

[Claims] A plurality of warp rows (1A, 1B) are arranged adjacent to each other, and air guides (6A, 6B) move integrally with the reeds (5A, 5B) in each warp row.
) is used to guide weft threads (4) together with jet air for weft insertion to weave woven fabrics (2A, 2B) of multiple widths. When the air guide (6
The weft guide passage of the fixed air guide (8) is provided so as to be lined up with the air guide (6A, A, 6B), and the passage cross-sectional area on the weft inlet side of the weft guide passage of this fixed air guide (8) is the same as that of the preceding air guide (6A). 2.) A weft insertion device for an air-jet loom, characterized in that the weft guide path is tapered to be substantially narrower in the weft insertion direction.