JPS5951612B2 - Weft insertion device in jet loom - Google Patents

Description

Detailed Description of the Invention The present invention comprises a free running section where the weft yarn, which flies on the air flow injected by the main nozzle, is supplied from a storage device, and a weft yarn which is continuously fed out from a length measuring device after free flight. This relates to the air ejection direction of the auxiliary nozzles corresponding to the length measurement flying section where the weft threads fly.

In the jet loom, the weft threads that have been previously fed out from the length measuring device and stored are inserted all at once by a jet jet, and the weft threads are continuously fed out to insert one weft thread.

The former weft flight is free flight and is carried out rapidly, and the latter weft flight is length measurement flight, and the weft speed is extremely small compared to free flight.

On the other hand, in the weft insertion method that uses a combination of a main nozzle and an auxiliary nozzle, the air jetted by the auxiliary nozzle has a stable flight function that allows the weft to fly stably without flying out of the guide slit, and a It is provided with a flight support function that promotes flight.

Conventionally, in this type of weft insertion device, the injection angle of the auxiliary nozzle with respect to the weft has been uniformly set to about 35° to 40° in order to satisfy the above-mentioned stable flying function and flying support function.

However, since the injection angle of this auxiliary nozzle is set to the same angle not only in the free flight section but also in the length measurement flight section, the length measurement flight in which the weft flight is synchronized with the feeding speed from the length measurement device is not possible. In the running section, the weft yarn stalls, and at the above-mentioned angle, the injection angle is too deep (too large), so the flight of the weft yarn is suppressed, causing weft wavering, and the guide slit and guide There were cases where the weft threads would stick out from the gaps between the pieces, causing weft insertion errors.

This invention was made by paying attention to the problems existing in the above-mentioned prior art, and its purpose is to stabilize the weft yarn without jumping out from the guide piece, not only in the free running part but also in the measuring flying part. It is an object of the present invention to provide a weft inserting device in a jet loom that can fly and prevent waving.

First, the outline of the geno 1 to loom to which the weft inserting device of the present invention is applied will be explained with reference to FIGS. This is a reed placed on the same sleigh 1.

Reference numeral 4 denotes a large number of guide pieces disposed on the slay 1 on the weaving front side from the reed 3, which are arranged in parallel in the weft insertion direction, and
A plurality of guide pieces 5 selected at appropriate intervals have a shape with the reed 3 side open.

Note that a guide wall 5a forming a guide portion is formed on the inner surface of the guide pieces 4, 5 on the weaving side, and a slit I. 16 are formed.

Reference numeral 6 denotes an auxiliary nozzle that is installed upright on the sleigh 1 in close proximity to the opening side of the guide piece 5, and its fluid jet opening is opened toward the weft insertion direction and toward the inner part of the guide wall 5a. There is.

Reference numeral 7 denotes a main nozzle arranged on the side of the guide pieces 4 and 5, through which the weft 11 drawn out from the wound yarn via a length measuring roller 8.9 constituting a length measuring device is stored in the storage device 12. After being temporarily stored, it is inserted into the main nozzle 7 via the gripper 13.

When the warp threads 14 are open, fluid is injected from the main nozzle 7 toward the guide pieces 4 and 5, and the weft threads 11, which are disengaged from the gripper 13, fly away during the jetting. Then, weft insertion is performed.

Thereafter, by driving the slitting cloth 2, beating is performed with the reed 3, and the woven fabric 15 is woven.

A first embodiment in which the weft inserting device of the present invention is embodied in the Geno I loom configured as described above is described below.
3, which shows the injection angle of the auxiliary nozzle 6 with respect to 1, in this embodiment, the weft 11 temporarily stored in the storage device 12 or the free flying portion 11 that flies uphill.
The injection angle θ1 of the auxiliary nozzle 6 is 35° to 40°.
When the weft 11 is in the state shown by the chain line in FIG. 1, the measuring rollers 8 and 9
A length measurement flying section 12 that flies in synchronization with the feeding speed from the
The spray angle θ2 of the auxiliary nozzle 6 is in the range of about 25° to 30°.

Now, to explain the operation of the weft inserting device configured as above, in the free flying section 1□, the injection angle θ1
Since the weft yarn 11 is deep (large), the weft yarn 11 is pushed far away from the slit 16 of the guide piece 4 and is blown away to fly stably.

At this time, since the weft yarn 11 flies rapidly, it is not swayed greatly even if the injection angle θ1 is large, and is sufficiently assisted in flight by the fluid jet.

Next, since the injection angle θ2 is shallow (small) in the length measurement flight part 2, the function for stable flight is weakened compared to the free flight part 1□, and the flight assistance function is strengthened. ing.

Therefore, near the tip of the weft yarn in a stalled state, the effect of stretching the weft yarn is stronger than the effect of pushing it deeper, so the weft yarn 11 can fly stably without causing waves or jumping out from between the guide pieces 4. will be carried out.

Next, in the second embodiment shown in FIG. 4, the injection angle θ3 of the auxiliary nozzle 6 at the starting end of the free flying part 1 is set to about 40°, and the injection angle θ4 at the terminal end is set to about 35°, and The injection angle of the auxiliary nozzle 6 is changed so that it becomes shallower in the weft insertion direction, and the injection angle θ5 of the auxiliary nozzle 6 at the starting end of the length measuring flight part 12 is set to about 30°, The injection angle θ6 is set to about 25°, and the auxiliary nozzle 6 is
This embodiment differs from the previous embodiment in that the spray angle is configured to become gradually shallower in the weft insertion direction, but its main effect is the same as in the previous embodiment.

Note that the present invention is not limited to the above-described embodiments, and may include changing the injection angle of the auxiliary nozzles at every appropriate number in each flying section, or adopting a guide piece in which the auxiliary nozzles are integrally formed. Any changes may be made without departing from the spirit of this invention.

As described in detail above, the jet loom weft insertion device of the present invention has a jet loom in which the injection angle of the auxiliary nozzle with respect to the weft in the length-measuring flying section is made shallower than that of the auxiliary nozzle with respect to the weft in the free flight section. Stable flight can be performed not only in the free flight section but also in the length measurement flight section without the weft thread jumping out of the guide piece.
Since it has the effect of preventing ripples, it is an excellent invention for industrial use as a weft insertion device in a jet loom.

[Brief explanation of the drawing]

1 and 2 schematically show a jet loom for implementing the weft insertion device of the present invention, and FIG. 1 is a plan view of the road body,
FIG. 2 is a schematic side view thereof. FIG. 3 and FIG. 4 are explanatory diagrams showing the injection angle of the auxiliary nozzle with respect to the weft in the first embodiment and the second embodiment, respectively. Slay...1, Reed...3, Guide piece・
...4゜5, Auxiliary nozzle ...6, Main nozzle ...7, Weft ...11, Storage device ...
...12, Free flying part...11, Length measurement flying part...12, Injection angle...θ1 to θ0

Claims (1)

[Scope of Claims] 1. A large number of guide pieces are arranged in parallel in the weft insertion direction on the slay so as to guide the fluid and weft injected by the main nozzle, and an opening is formed toward the guide part formed on the guide piece. In the jet loom in which a plurality of auxiliary nozzles are arranged, the injection angle of the auxiliary nozzles with respect to the weft yarn in the length-measuring flight section is made shallower than the injection angle of the auxiliary nozzles with respect to the weft yarn in the free flight section. Weft insertion device in jet loom. 2. The weft inserting device in a jet loom according to claim 1, wherein the jetting angle of the nozzle with respect to the weft in the free flight section and the length measurement flight section is set constant. 3. The jet loom according to claim 1, characterized in that the injection angle of the auxiliary nozzle with respect to the weft in the free flight part and the length measurement flight part is formed such that it becomes shallower on the flight direction side. Weft inserting device. 4. Claim 2 or 3, characterized in that the injection angle of the free flying part is about 35° to 40°, and the injection angle of the length measuring flying part is about 25° to 30°. Weft inserting device in the jet loom described in 2.