JPS60252752A - Plural-yarn wefting apparatus in fluid jet type loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a multi-yarn weft insertion device in a fluid jet loom such as an air jet loom.

2. Description of the Related Art In general, in the case of alternating multiple colors in a fluid jet loom, it is necessary to insert weft yarns of different colors alternately.For this purpose, a plurality of weft inserting main nozzles are provided, and the weft inserting main nozzles are inserted in a predetermined order. Weft is inserted by spraying the weft from each main nozzle.

In a conventional weft insertion nozzle changing device for a fluid jet loom, a plurality of main nozzles are mounted on a common bracket, the bracket is swingably supported on a swing shaft, and the machine is fixed to a cam drive shaft. The main nozzle is replaced by swinging the bracket around the swing axis using a cam of
7-133248).

Problems to be Solved by the Invention In the conventional weft inserting nozzle changing device for a fluid jet loom, the weight of the moving part is large in order to move the entire plurality of main nozzles, and it cannot be applied to high-speed operation. There is a problem that mechanical strain is easily applied to the parts.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems associated with conventional devices as described above, and to provide a multi-thread weft inserting punch device that is applicable to high-speed operation by reducing the mass of moving parts for nozzle exchange. do.

Means for Solving the Problems The present invention provides a method in which a plurality of acceleration tubes are fixedly installed in parallel, and an auxiliary acceleration tube carried to the tip of the acceleration tube is moved in a direction intersecting the longitudinal direction of the acceleration tubes. The above-mentioned problems are solved and the above-mentioned objects of the invention are achieved by a multi-thread weft insertion device in a fluid-jet loom that can be provided.

Examples Hereinafter, with reference to the accompanying drawings, which illustrate examples of the present invention,
The present invention will be described in detail.

FIG. 1 shows a partially sectional front view of an embodiment of the present invention with the drive system omitted, and FIG. 2 is a side view including the drive system.

In FIG. 2, the locking shaft 15 performs one reciprocating rocking motion for each rotation (one beat) of the loom in conjunction with the crankshaft of the loom. A sled 1 is fixedly installed on a locking shaft 15 via a sled 2. The sleigh 1 has a large number of weft guides 3 and reeds 1 that guide the weft threads.
9 is fixed by 1 seed holder.

As shown in FIG. 1, a main nozzle bracket 4 is fixedly installed on the weft insertion side of the sled 1, a pair of main nozzle thread guides 5 are fixedly attached to the main nozzle bracket 4, and the tip of each main nozzle thread guide 5 is fixed. Accelerator tubes 6a and 6b are integrally fixed to each.

In order to increase the speed, it is preferable that the ends of the acceleration tubes 6a and 6b on the side opposite to weft insertion be sufficiently close together to reduce the amount of movement of the auxiliary acceleration tubes 7a and 7b. The accelerator tubes 6a and 6b may remain parallel, but if they remain parallel, the ends of the accelerators 16a and 6b on the opposite side of weft insertion cannot be brought close enough together due to the thickness of the main nozzle thread guide 5. 1st
As shown in the figure, it is preferable that the tip ends of the acceleration tubes 6a and 6b be inclined toward each other and intersect with each other near the extension line of the hole in the weft guide 3.

Referring again to FIG. 2, the sleigh 1 is provided with a fixed bracket 20, and a movable bracket 8 is swingably supported by the shaft 1 at the tip of the fixed bracket 20. Movable bracket 8
Two auxiliary acceleration tubes 7a and 7b are attached to the tips of the auxiliary acceleration tubes 7a and 7b.

As shown in FIG. 1, the front ends of the auxiliary acceleration tubes 7a and 7b on the weft guide 3 side are parallel to each other, and the acceleration tubes 6a and 6b
The rear end of the side is slightly angled so as to be parallel to the acceleration tubes 5a and 5b.

Auxiliary acceleration tube 7a connected to the tip of acceleration tubes 5a, 5b
, 7b are movable in the direction of arrow C (FIG. 1) intersecting the longitudinal direction of the acceleration tubes 6a, 6b. That is, by changing the positions of the auxiliary acceleration tubes 7a and 7b by the pitch A (Fig. 1) with the replacement member, the auxiliary acceleration tubes 7a and 7b can be
The rear end is located on the extension of the acceleration pipe 6a and the front end is located on the extension of the weft guide hole of the weft guide 3, and the material is transferred from the acceleration pipe 6a to the weft guide 3 via the auxiliary acceleration pipe 7a. The weft is inserted, and the rear end of the auxiliary acceleration pipe 7b is located on the extension of the acceleration pipe 6b, and the front end is located on the extension of the weft guide hole of the weft guide 3, and the weft is inserted from the acceleration pipe 6b. The weft is inserted into the weft guide 3 via the auxiliary acceleration pipe 7b.

The inner diameter of the auxiliary acceleration tubes 7a, 7h is made equal to or larger than the inner diameter of the acceleration tubes M6a, 6b, so that the weft can be smoothly transferred from the acceleration tubes 5a, 5b to the auxiliary acceleration tubes 7a, 7b.

Also, the gap B (Fig. 1) between the acceleration tubes 5a, 5b and the auxiliary acceleration tubes 7a, 7b is
In order to prevent the auxiliary acceleration tubes 7a and 7b from coming into contact with each other, and to prevent the gap from acting as a cutter to cut the weft yarn, it is preferable to set the length to a certain extent, for example, about 111 m.

On the other hand, if this gap is too large, air will blow out from between the acceleration tubes 6a, 6b and the auxiliary acceleration tubes 7a, 7b, reducing the propulsive force of the main nozzle.
+a, preferably less than or equal to +a.

An example of the replacement member will be explained based on FIG. 2. A bracket 12 is fixed to a locking shaft 15, and a pivot lever 14 having an angled shape is swingably supported at the tip of the bracket 12 by a shaft 13. The pivot lever 14 is connected to the bracket 8 via a connecting rod 1o and a rod end 9 (FIG. 1). Furthermore, a U-shaped coupling groove 14a is formed at the tip of the rotating lever 14. A cam lever 16 is swingably supported around a shaft 22 provided on the machine base, and cam followers 16a and 16b are rotatably supported at both ends of the cam lever 16, respectively.

Cam follower 16a is engaged with coupling groove 14a, and cam follower 16b is in contact with cam 17. The cam 17 is fixed to the drive shaft 18.

As the drive shaft 18 rotates, the cam 17 rotates, causing the cam lever 16 to swing around the shaft 22. Thereby, the rotary lever 14 is pushed up and down, and the bracket 8 is raised and lowered at the same time, thereby raising and lowering the auxiliary acceleration pipe 7a17b.

In the embodiment shown in FIG. 2, the cam lever 16 is oscillated by the cam 17, but the cam lever 16 may be oscillated by an electromagnetic solenoid or a fluid pressure cylinder. In conventional multi-thread weft insertion devices in fluid-jet looms: so-called free exchange, in which exchange is performed in an arbitrary pattern by electrically controlling electromagnetic solenoids, etc., in order to move the heavy weight, the output is insufficient. This was difficult and difficult, and movement control had to be performed exclusively mechanically using cams or the like.

For this reason, the replacement pattern of conventional devices has become regular, and only so-called scheduled replacements can be performed. However, in the present invention, since it is only necessary to move the auxiliary accelerator tube, the mass of the moving part is small, and it is also possible to control it electrically using an electromagnetic solenoid, etc., and the replacement pattern can be freely selected. Exchanges can also be made.

A state in which the weft yarns are wefted overnight using the multi-thread weft insertion device in the fluid jet loom of the present invention will be explained with reference to FIGS. 3 to 5. FIG.

In FIG. 3, the acceleration tube 6a and the auxiliary acceleration tube 7a are aligned, and the tip 11a of the weft yarn 11 cut by the cutter comes out from the tip of the auxiliary acceleration tube 7a. From this state, when the auxiliary acceleration tubes 7a and 7b are moved in the C direction as shown in FIG. 4 and the acceleration tube 6b and the auxiliary acceleration tube 7b are aligned, the weft yarn 11b is loosened between the acceleration tube 6a and the auxiliary acceleration tube 7a. (arrow E)
. On the other hand, the tip end 11a of the weft yarn that had come out from the tip of the auxiliary acceleration tube 7a in FIG. 3 is due to the movement of the auxiliary acceleration tube 7a.

, it is pulled back into the auxiliary acceleration tube 7a (in the direction of the arrow)
.

In this state, as shown in FIG. 5, when the main nozzle airflow flows from the accelerating tube 6b to the auxiliary accelerating tube 7b, the weft 11b that has protruded between the accelerating tube 6b and the auxiliary accelerating tube 7b is inside the accelerating tube. Return to (arrow G) and insert the weft (arrow H).

Therefore, the weft yarn 11a hanging down from the front of the accelerating tubes 6a and 6b will not become entangled with the weft yarn 11 to be inserted, causing a weft insertion error. Moreover, in the present invention, the auxiliary acceleration pipe 7 can be
The movement of the auxiliary acceleration tubes 7a and 7b causes the auxiliary acceleration tubes 7a and 7 to
It has the effect of pulling back the weft yarn hanging from the tip of b, and prevents weft insertion errors caused by entangled weft yarns.
The device is simplified because no pull-back member is required.

According to the present invention, a plurality of acceleration tubes are fixedly installed in parallel,
An auxiliary accelerating tube connected to the tip of the accelerating tube is provided so as to be movable in a direction intersecting the longitudinal direction of the accelerating tube, and the mass of the nozzle replacement part is extremely small, thereby increasing the speed of the loom. Furthermore, since the mass of the moving part is small, it can be applied to replacing nozzles of three or more colors.

In the present invention, by moving the auxiliary accelerator tube, the weft yarn hanging down from the tip of the auxiliary accelerator tube that is not in use can be pulled back without providing a special pull-back member, thereby eliminating weft insertion errors caused by entangled weft yarns. This reduces weft insertion errors.

[Brief explanation of the drawing]

FIG. 1 shows a partially sectional front view of an embodiment of the present invention with the drive system omitted, and FIG. 2 shows a side view including the drive system.
3, 4, and 5 are schematic sectional views for explaining the present invention in detail. 6a, 6b...Acceleration tube, 7a, 7b...Auxiliary acceleration tube Fig. 1 5 Fig. 2

Claims (1)

[Claims] 1. In a multi-yarn cotton inserting device for a fluid jet loom, a plurality of acceleration tubes are fixedly installed in parallel, and an auxiliary acceleration tube connected to the tip of the acceleration tube is arranged in a longitudinal direction of the acceleration tube. 1. A multi-thread weft insertion device for a fluid jet loom, characterized in that the device is movable in a direction intersecting the direction of the loom. 2. The multi-yarn cotton inserting device for a fluid injection type loom according to claim 1, wherein the inner diameter of the auxiliary acceleration tube is at least equal to the inner diameter of the acceleration tube.