JPH02269832A - Weft inserter for air-jet weaving machine - Google Patents

Abstract

PURPOSE:To obtain the title apparatus of high duration even when the weaving speed is increased, by guiding the air guide between adjacent warps in the backing direction relatively to the slay sword. CONSTITUTION:Air guide 7 which is supported movably so that it can go back relatively to the slay sword, is guided with cam 20 fixed on the frame side of the weaving machine, and the air guide is guided in the backing direction to the slay sword on beating to prevent tack-in selvage apparatus from interfering with cloth fell device. The air guide is always guided with the cam to increase its duration, even when the weaving operation speed is increased.

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 cloth of multiple widths with multiple warp rows adjacent to each other in an air-jet loom, weft insertion was performed using a weft insertion nozzle installed on one side of the weft, and a weft insertion nozzle attached to a thread sword was used. Although the weft is guided by the air guide (including a special reed) together with the blast 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 warp rows abuts against a stopper and is retracted in the backward direction. Accordingly, there was a need to further improve durability.

In view of these points, it is an object of the present invention to provide an apparatus that is highly durable even when fiber manufacturing speeds up.

<Means for Solving the Problems> For this reason, the present invention weaves woven fabrics of multiple widths by guiding the weft yarns together with jet air for weft insertion by an air guide attached to a thread sword in which a plurality of warp rows are adjacent to each other. In a weft inserting device for an air injection loom, an air guide between adjacent warp rows is supported by a thread sword so as to be movable in a relative backward direction, and the air guide is guided by a cam fixed to the frame side of the loom. , the air guide is configured to be retracted in the backward direction from the thread sword during shingling.

<Function> In the above configuration, the air guide between the warp thread rows takes the weft guide position when the reed is retreating (when inserting the weft), takes the retracted position when the reed moves forward (when reeding), and is located at the tuck-in ear. Interference with auxiliary equipment such as assembly equipment can be prevented. Since the air guide is constantly guided by the cam, there is no collision.
The device is sufficiently durable even when weaving speeds up.

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

Referring to FIG. 3, the warp rows 1A and 1B are placed adjacently, and
When weaving the woven fabrics 2A and 2B, the weft thread 4 is inserted using the weft inserting nozzle 3 provided on one side of the fabric, or by using an auxiliary nozzle (not shown). The special flow type air guides 5A and 5B guide the weft threads 4 together with air for weft insertion, but since a tuck-in selvage assembly device 6 for the middle selvage is provided between the adjacent warp rows 1A and 1B, the adjacent warp threads are The weft yarn 4 is guided by another air guide 7 between the rows 1A and 1B.

Referring to FIG. 1 and FIG. 2, an appropriate number of thread swords 9 are attached to a thread sword shaft 8 that makes reciprocating angular movements in conjunction with the main shaft of the loom.
are fixed, and a reed holder 10 is fixed to the upper ends of these. A reed 11 is attached to the reed holder 10. In the parts of this reed 11 corresponding to the warp rows 1A and 1B, the reeds are arranged in parallel, and a recess is formed on the front side of each reed, and the row of recesses forms the air guides 5A and 5B.
is formed.

Further, the portion corresponding to the warp rows 1A and 1B of the reed 11 is removed from the normal threads, and the air guide forming member 12 is positioned therein. This air guide forming member 12 is made up of members having almost the same shape as the exiles arranged at a predetermined interval in the weft insertion direction, and a recess is formed on the front side of each member, and the row of recesses allows the air guide 7 to be It is formed.

Note that this other air guide 7 may be a block-shaped one with no gaps in the weft insertion direction.Which one is selected depends on the airflow depending on the presence or absence of leakage from the gaps, including the relationship with the auxiliary nozzle. Determine by taking into account stability, etc.

Next, a support structure for the air guide 7 (air guide forming member 12) will be explained.

A bracket 13 is fixed to the rear end of the reed holder 10, and a support shaft 14 is provided on the bracket 13. Note that the support shaft 14 may be provided directly on the thread sword 9, or may be provided indirectly as in this example.

The support shaft 14 rotatably supports an intermediate boss portion 15a of the lever 15. The air guide forming member 12 is fixed to the upper end of the lever 15 via a bracket 16.

The lever 15 is a hook 1 fixed to the thread sword shaft 8.
The cam follower 19, which is pivotally connected to the pin 18b at the lower end of the lever 15, is brought into contact with the cam 20.

The cam 20 is fixed via a bracket 22 to an angle member 21 extending between frames of a loom.

Next, the effect will be explained.

When the thread sword 9 is retreating, as shown in FIG. 1, the cam follower 19 is in contact with the circular arc portion 20a of the cam 20 centered on the axis of the thread sword shaft 8, and the lever 15 is not driven. Therefore, the lever 15 is rotated clockwise in the figure by the spring 18, and the air guide 7 is aligned with the other air guides 5A and 5B.

Since weft insertion is performed in this state, a sufficient guiding function for the weft threads 4 can be exerted.

When the thread sword 9 moves forward, as shown in FIG. 2, the cam follower 19 comes into contact with the peak 20b of the cam 20 that gradually moves away from the axis of the thread sword shaft 8, and the lever 15 moves counterclockwise in the figure. driven in the direction. Therefore, the air guide 7 is retracted in the backward direction.

Therefore, when beating the reed, the air guide 7 is
interference can be avoided.

Note that it is preferable to use a grooved cam as the cam 20 because the behavior of the lever 15 and the like becomes more stable.

<Effects of the Invention> As explained above, according to the present invention, it is possible to prevent the air guide between the warp rows from interfering with the weaving auxiliary equipment such as the tuck-in selvedge assembly device during reed beating, and the air guide Since the weaving machine is always guided by the weaving machine, collisions do not occur, so even if the loom speeds up, sufficiently high durability can be achieved.

[Brief explanation of drawings]

1 and 2 are side views showing an embodiment of the present invention in different operating states, and FIG. 3 is a plan view of the entire device. LA, IB...warp 2A, 2B...woven fabric 3
...Weft insertion nozzle 4...Weft thread 5A, 5B.
... Air guide 6 ... Tuck-in ear assembly device 7
...Air guide 9...Thread sword 10...
- Reed holder 11... Reed 12... Air guide forming member 13... Bracket 14... Support shaft
I5...Lever 18...Spring 19
...Cam follower 20...Cam patent applicant Nissan Motor Co., Ltd. Agent Patent attorney Fujio Sasashima 5A, 5B...Air guide 7...Air guide 9...Thread sword 15...Lever 20...・Cam and Figure 2 Figure 3

Claims (1)

[Claims] A plurality of warp rows (1A, 1B) are made adjacent to each other, and a thread sword (9
) The air guides (5A, 5B) installed in
2A, 2B), the air guide (7) between adjacent warp rows is supported movably in the backward direction relative to the thread sword (9), and the air guide (7) is The cam (2) fixed to the frame side of the loom
0), and the air guide (7) is retracted in a backward direction with respect to a thread sword (9) during reed beating.