JPH06474Y2 - Incomplete weft insertion yarn removing device for fluid jet loom - Google Patents

Description

[Detailed Description of the Invention] << Industrial field of application >> This invention is designed to automatically restart a loom that has been stopped due to incomplete weft insertion in a fluid jet loom. The present invention relates to an apparatus for removing a weft thread that has been imperfectly inserted (hereinafter referred to as "miss weft thread").

《Prior art》 Several techniques have already been proposed for pulling out the miss weft from the warp shed when the loom stops operating due to incomplete weft insertion such as show topic, tip bending, and weft breakage in the fluid jet loom. ing.

For example, during the normal operation of the loom, the miss weft removing device composed of the winding body etc. is placed in the standby position, and at the time of removing the miss weft, this device is moved between the main nozzle and the fabric edge to capture the miss weft. In addition, there is a device for forcibly pulling and removing from the warp opening.

Further, in another device of this kind, for example, a miss weft is caught by a guide mechanism and is guided to a take-up removing device installed at a position outside the weft flight path. There is one that pulls out and removes.

By the way, it is preferable that the main nozzle is as close as possible to the warp opening in order to reduce the diffusion of the jetted fluid. Therefore, the distance between the main nozzle and the warp is generally set to be very narrow. Therefore, in order to move the removing device such as the winding body between the main nozzle and the warp, it is necessary to set a wide interval between them.
It is not preferable because the tip of the main nozzle inevitably moves away from the warp opening.

The latter type of guide mechanism which catches the miss weft and delivers it to the take-up removing device has a drawback that the delivery is not reliable.

In addition, the loom is operated by inertia after the incomplete weft insertion occurs and a loom stop signal is output, and the weft is in a beating condition. Therefore, if the miss weft is to be pulled out, the warp may be damaged depending on the pulling direction, resulting in a fabric defect. Since the installation position of the take-up removing device is limited, when the miss weft is to be pulled out, the miss weft inevitably rubs against the warp and damages the warp, which causes a defect of the fabric.

<Purpose of Invention> This invention has been proposed in view of the problems of the above-mentioned conventional miss weft removing device. In steady operation, the main nozzle is positioned at the optimum normal position with respect to the warp shed, that is, An object of the present invention is to provide a device capable of removing a wrong weft yarn automatically when the defective weft insertion occurs, and automatically and without damaging the warp yarn, while installing the main nozzle in a position close to the warp yarn opening.

<Basic Configuration of the Invention> In order to achieve the above object, the present invention is provided with a main nozzle that is set to move away from a warp shed and a main nozzle that is provided on either the upstream or downstream side of the main nozzle. The device is composed of a clamper movable with the nozzle and a miss weft suction mechanism provided at a predetermined position on the upstream side of the clamper, and the clamper opens and closes at a predetermined timing on the weft path when removing the miss weft. It is set so that when the clamper is at the closing timing, the miss weft that is connected to the warp opening is moved together with the main nozzle that has been inserted, and when the clamper is at the opening timing, it is set to return to the original position together with the main nozzle. And

<< First Embodiment >> An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the main nozzle MN has a holder 21.
And the holder 21 is attached to the slide piece 23. This slide piece 23
Is held on the slide base 25 so as to be reciprocally slidable in the weft inserting direction at a predetermined timing described later. This reciprocal sliding of the slide piece 23 is performed by the operation of the solenoid 31 that is in contact with the holder 21.

A clamper 29, which holds and releases the weft passing therethrough at a predetermined timing described later, is provided at a position separated from the tip of the main nozzle MN. The clamper 29 is connected to the sluice piece 23 through the holder 21.
Is mounted on. The opening / closing operation of the clamper 29 is performed by the solenoid 33. This clamper 29 is always in an "open" state so as not to disturb weft insertion during steady operation.

The main nozzle MN and the clamper 29 are mounted on the same slide piece 23, and the operation of the solenoid 31 causes the main nozzle MN and the clamper 29 to simultaneously reciprocate in the weft inserting direction.

A suction nozzle 39 is arranged at a predetermined position between the main nozzle MN and the clamper 29, for example, above the weft W flight path, and the suction nozzle 39 is provided with a suction mechanism (not shown) that performs suction operation for a predetermined time at a predetermined timing. The miss weft W, which is connected and pulled out from the warp shed as will be described later, is sucked. However, it is an obstacle to the weft insertion during steady operation that the suction nozzle 39 is located at a position close to the weft W connected to the woven fabric from the main nozzle MN during the suction operation, and at a standby position during the non-operation. It is not desirable, so it is desirable.

<< Operation of First Embodiment >> Next, the operation of this embodiment will be described.

During steady operation, as shown in FIGS. 2 (A) and 2 (B), the clamper 29 is “open”, and the main nozzle MN and the slide piece 23 on which the clamper 29 is mounted and held are at the most advanced position in the weft inserting direction. It is in.

When the weft insertion failure signal is output and the operation of the loom is stopped,
With the conventional method, the cutter 9 for cutting the weft thread continuing from the main nozzle MN to the edge of the woven fabric is made inoperative and
The loom is reversely rotated to a predetermined crank angle and the warp yarn Y is opened. Then, the clamper 29 is closed at this position to grip the miss weft.

Needless to say, at this time, the weft in the cycle following the miss weft is prevented from being inserted by the action of, for example, a weft gripping device (not shown) or a locking pin of the weft storage device.

Next, as shown in FIGS. 3A and 3B, the clamper 2
The solenoid 31 is operated to retract the slide piece 23 in the reverse weft inserting direction with 9 closed, that is, with the miss weft grasped. Then, the miss weft W is pulled in the reverse weft inserting direction.

Next, as shown in FIGS. 4 (A) and 4 (B), the clamper 2
9 is opened and the solenoid 31 is operated to move the slide piece 23 forward. At this time, if a suction mechanism (not shown) is operated, the drawn-out portion of the miss weft is sucked by the suction nozzle 39.

After this, the operation shown in FIGS. 3 (A) and 3 (B) and then to FIGS. 4 (A) and 4 (B) is performed again.
After that, if this operation is repeated a predetermined number of times, the miss weft W is gradually pulled out from the opening of the warp Y, and
The suction nozzle 39 sucks it, and finally the tip of the miss weft W is pulled out and sucked by the suction nozzle 39.

After this, as shown in FIG. 5, the suction nozzle 39 is retracted, and the miss weft W connected to the main nozzle MN and the suction nozzle 39 is cut by the cutter 40.

In the above description, the main nozzle MN and the clamper 2
9 has been described as moving back and forth in the direction of the weft flight path,
Since the miss weft is beaten and bites between the upper and lower warps, merely pulling in the reverse weft insertion direction causes warp damage. Therefore, as shown in the first embodiment, the main nozzle MN Alternatively, the slide base 25 on which the clamper 29 and the like are placed may be temporarily moved in the warp feeding side direction, and then reciprocally moved in the weft inserting direction. In this case, the original position is restored before restarting the loom.

In the above embodiment, the clamper 29 and the suction nozzle 39 may be provided on the upstream side of the main nozzle MN.
At this time, the clamper 29 may be moved back and forth together with the main nozzle MN.

Further, only the suction nozzle 39 may be provided on the upstream side of the main nozzle MN.

Furthermore, the suction nozzle 39 may be moved back and forth together with the main nozzle MN and the clamper 29.

<< Second Embodiment >> Although the clamper 29 is separated from the tip of the main nozzle MN in the first embodiment, the present invention is not limited to this, and the clamper is directly attached to the tip of the main nozzle. It goes without saying that you can do it later.

<< Third Embodiment >> The clamper and the suction nozzle may be provided on the downstream side of the main nozzle MN. At this time, the clamper and the suction nozzle may be rotated together with the main nozzle MN.

Since the main nozzle and N may be moved so that the weft path from the clamper to the warp opening becomes longer, the movement mode is not limited to the above as long as the weft path is long.

Of course, the technical idea of moving the main nozzle and the clamper away from the warp opening also includes moving in the warp direction.

<Effect of device> According to this device, the main nozzle and the clamper are moved away from the warp opening to pull out the weft yarn.
There is no need to separately provide a pull-back member, and the structure becomes simpler.

Further, since the miss weft is pulled out by moving the clamper that holds the defective weft, the miss weft is not caught in the removing device during the pulling out.

Furthermore, since the main nozzle and the clamper are moved together, the miss weft yarn is not squeezed between the main nozzle and the clamper during drawing, and the miss weft yarn can be reliably removed without causing yarn breakage.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of an incomplete weft-insertion yarn removing device for a fluid jet loom according to the present invention, and FIGS. 2 to 5 are plan views showing an operating state of the first embodiment. It is a figure. 9 ... Main cutter 21 ... Holder 23 ... Slide piece 25 ... Slide base 29 ... Clamper 31, 33 ... Solenoid 39 ... Suction nozzle 40 ... Cutter W ... Miss weft (weft) Y ... Warp MN ... Main nozzle

Claims (3)

[Scope of utility model registration request] 1. A main nozzle that is set to move away from a warp shed and a main nozzle that is provided on either the upstream or downstream side of the main nozzle.
It consists of a clamper that can move together with the mains nozzle, and a miss weft suction mechanism provided at a predetermined position on the upstream side of the clamper.The clamper opens and closes at a predetermined timing on the weft path when removing the miss weft. It is set so that when the clamper is at the closing timing, it moves together with the main nozzle through which the miss weft thread that is connected to the warp opening is inserted, and when the clamper is at the opening timing, it is set so as to return to the original position together with the main nozzle. An incomplete weft-insertion yarn removing device for a fluid-jet type loom. 2. The utility model registration claim according to claim 1, wherein the change in the tip position of the main nozzle is obtained by reciprocally rotating the main nozzle about a predetermined position. ] An incomplete weft-insertion yarn removing device for a fluid jet loom according to the item [1]. 3. The utility model registration claim [1], characterized in that the change of the tip position of the main nozzle is obtained by reciprocating the main nozzle in the weft inserting direction. Incomplete weft-insertion yarn removing device for fluid-jet type loom.