JPH02127543A - Picking-control device of loom for multicolored woven fabric - Google Patents

Abstract

PURPOSE:To minimize the stopping of a loom to contrive the great improvement of the operation rate of the loom by selecting a picking device with a picking device- selecting circuit in the case of a multicolor weaving operation and successively selecting fiber sensor-nonoperated devices with a picking device-selecting circuit for a single color operation in the case of the single color weaving operation. CONSTITUTION:In a multicolor picking device, fiber sensors disposed between the respective fiber-suppliers and respective weft length-measuring and storing devices of plural lines, a picking device-selecting circuit for selecting a picking device with a weft-selecting signal, a mode-switching switch for switching between a multicolor weaving operation and a single color weaving operation and a picking device-selecting circuit for the single color operation are disposed to constitute a control system. In the case of the multicolor weaving operation, one of the picking devices is selected with the picking device-selecting circuit. In the case of the single color weaving operation, the picking device-selecting circuit for the single color operation selects in turn the fiber sensor-nonoperated picking devices and outputs a frame-stopping signal only when all the fiber sensors are operated whereby the operation of the loom is continued so long as a line in which the supply of the fiber is continued exists.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a weft insertion control device for a loom for multicolored textiles, in particular,
The present invention relates to a weft insertion control device for a multicolor fabric loom for efficiently operating a multicolor fabric loom equipped with a plurality of series of weft insertion devices for weaving monochrome fabrics.

Prior Art A loom for multi-colored textiles that uses multi-colored weft threads is equipped with multiple series of weft insertion devices depending on the type of weft thread used, and each weft thread is inserted into each weft insertion device, and then a dobby Weaving is performed while these weft insertion devices are sequentially switched in response to a weft selection signal from a device or the like. However, it is not at all uncommon for monochromatic fabrics to be woven using such multicolored fabric looms having multiple series of weft insertion devices.

In such a case, it is sufficient to set the same type of weft yarn in all the weft insertion devices and use these weft insertion devices while switching in an arbitrary order. It's normal to go.

In addition, a yarn sensor is installed at each entrance end of the multiple series of weft insertion devices to check whether or not there is a weft yarn being unwound from the yarn feeder. , outputs a loom stop signal when one of them operates,
It is necessary to be able to continue weaving only when all the weft yarns are normally supplied.

The problem to be solved by the invention is that when using the conventional technique, if the supply of even one weft thread to each weft insertion device is cut off, the loom will stop. In the case of monochromatic weaving,
This will cause significant inconvenience. In other words, in the case of monochromatic weaving, multiple series of weft insertion devices are loaded with the same type of yarn, so even if the supply of weft threads of any one series is cut off, the supply of weft threads of all series is interrupted. As long as the remaining threads are not cut off, weaving can be continued without any problem using the remaining threads, so stopping the loom due to the activation of thread sensors for each thread will unduly reduce the operating rate of the loom. It was something to encourage.

Therefore, in view of the actual state of the prior art, in the case of monochromatic weaving, the object of the present invention is to simply stop the operation of the weft inserting device corresponding to the activated yarn sensor, and when all yarn sensors are activated. A weft insertion control device for a loom for multicolor fabrics, which outputs a loom stop signal only when the loom is weaving in a single color, thereby effectively preventing the loom from stopping unreasonably in the case of monochrome weaving, and improving the operating rate of the loom. Our goal is to provide the following.

Means for Solving the Problems The present invention has a configuration in which a weft insertion device to be operated is selected by a yarn sensor provided at each inlet end of a plurality of series of weft insertion devices and a weft selection signal. In addition, a mode changeover switch for switching and specifying multicolor weaving and single-color weaving, and a weft insertion selection circuit for single-color weaving are provided. Select a weft insertion device, and in the case of monochrome weaving, the monochrome weft insertion selection circuit sequentially selects only the weft insertion devices whose thread sensors are not operating, and outputs a loom stop signal when all thread sensors are activated. The gist is what we have done.

In terms of operation, in the case of multicolor weaving, the weft insertion selection circuit selects the weft insertion device in accordance with the weft selection signal to produce a predetermined multicolor weave. The yarn sensor outputs a loom stop signal when one of the yarn sensors is activated. on the other hand,
In the case of single-color weaving, the single-color weft insertion selection circuit sequentially selects only the weft insertion devices whose thread sensors are not operating.
As long as there is a weft insertion device that is normally supplied with weft, the loom can continue weaving. When all the yarn sensors are activated, there is no remaining weft inserting device that is normally supplying weft yarns, so a loom stop signal is output for the first time at this time to stop the loom. Therefore, there is no risk that the loom will be unduly stopped in a state where it can continue normal operation.

It works as described above.

Example Examples will be described below with reference to the drawings.

The weft insertion control device (hereinafter simply referred to as the control device) for a loom for multicolored fabrics includes, in addition to the selection circuit 10, a feeder drive circuit 21, a locking pin drive circuit 22, and a nozzle drive circuit 2.
3 (Figure 1).

Assume that the loom is a water jet loom for two-color fabrics, each having two lines of weft inserting devices, each consisting of a drum-type weft length measuring and storage device and a weft inserting nozzle N. For each series, the yarn is unwound from the yarn feeder Y1, and the weft length measuring and storage device measures and stores the length of the specified pick, and the length of the one pick is transferred to the locking pin D1 and the weft insertion nozzle N. By controlling the above, it is assumed that the weft is inserted into the warp shedding (not shown).

The weft insertion device has thread sensors A1, A2, A for each series.
It has 3. That is, the yarn sensor A1 is located at the entrance end of the weft inserting device, at the intermediate portion between the yarn feeder Y1 and the weft length measuring and storage device.
A yarn sensor A2 is installed between the weft length measurement storage device and the weft insertion nozzle N, and furthermore, on the side opposite to the weft insertion,
A thread sensor A3 is provided. The outputs of the yarn sensors A2 and A3 are led to a loom control circuit (not shown) and used as a loom stop signal.

Output signals Sal and Sat from the yarn sensors A1 and A1 are led to a selection circuit 10. In addition, the selection circuit 10 includes
A weft selection signal Sy from a dobby device (not shown) or the like is input, and a mode changeover switch SW is also connected. The output of the selection circuit 10 is branched as a selection drive signal Sd to a feeder drive circuit 21, a locking pin drive circuit 22, and a nozzle drive circuit 23, and each output is as follows.
It is divided into a weft sub-length storage device DSD, locking pins D1 and Dl, and weft insertion nozzles N and N. Further, a loom stop signal St is outputted from the selection circuit 10 and guided to a loom control circuit (not shown).

A mechanical angle signal Sm from an encoder EN that detects the mechanical rotation angle of the loom is input to the control device 1. That is, the mechanical angle signal Sm passes through the timing circuit 24 and is sent as the timing signal Smt to the selection circuit 10, the feeder drive circuit 21, the locking pin drive circuit 22, and the nozzle drive circuit 2.
A branch input is made to 3.

The selection circuit 10 includes a weft insertion selection circuit 11 and a single color weft insertion selection circuit 12 (Fig. 2), and the weft selection signal Sy is input only to the former, while the weft selection signal Sy is input to the mode changeover switch SW. , yarn sensor A1, output signal Sa from A1
t, Sal, and the timing signal Smt are branched into both. Further, the selection drive signal Sdl which is output from the weft insertion selection circuit 11 and the single color weft insertion selection circuit 12
, Sd2 and the loom stop signals Stl, Si2 are outputted to the outside as the selection drive signal Sd and the loom stop signal St via OR gates 13, 14, respectively.

The operation of the control device 1 having such a configuration is as follows.

First, consider the case of multicolor weaving with the mode changeover switch SW open. In this case, only the weft insertion selection circuit 11 of the selection circuit 10 operates, and the single color weft insertion selection circuit 12 stops its operation. ing. Weft insertion selection circuit], 1 selects and operates the series of weft insertion devices specified by the weft selection signal Sy.
Output.

Since the selection drive signal Sdl becomes the selection drive signal Sd via the OR gate 13, the feeder drive circuit 21, locking pin drive circuit 22, and nozzle drive circuit 23 match the predetermined weft insertion time indicated by the timing signal Smt. Thus, the weft length measuring and storage device D1 locking pin Di and the weft insertion nozzle N belonging to the system designated by the weft selection signal Sy can be operated. Here, the weft selection signal Sy selects the operation of one system of the weft insertion device depending on the woven structure, so if a yarn feeder Y1 of a different yarn type is installed for each system, a predetermined It is possible to weave a two-color fabric with a woven structure.

At this time, the weft insertion selection circuit 11 selects the thread sensor Al.
, Al is activated, and its output signal Sa
When t is input, the loom stop signal S11 is immediately output, so that the loom can automatically stop when the supply of weft Y from the yarn feeder Y1 of either system is cut off. can.

Next, let us consider a case where the mode selector switch SW is turned on and monochrome weaving is performed.

At this time, the weft insertion selection circuit 11 stops its operation, and the monochrome weft insertion selection circuit 12 operates.

The monochrome weft insertion selection circuit 12 is configured such that the yarn sensors A1 and AI are
When the output signals Sal and Sal are not outputted (left column in Fig. 3), the two series of weft insertion devices are alternately operated every cycle of the machine rotation angle in response to the timing signal Smt. The selection drive signal Sd2 is outputted so that it can be selectively operated.

Correspondingly, the feeder drive circuit 21, the locking pin drive circuit 22, and the nozzle drive circuit 23 are each designated by the selection drive signal Sd2, that is, the selection drive signal Sd, in order to match the predetermined weft insertion timing. The weft length measuring and storage device D, the locking bin D1, and the weft insertion nozzle N of the system on the other side are activated, and the weft yarn Y from the yarn supplying bodies Yl and YL of the two systems is activated.
, Y can be inserted alternately. That is, if the yarn feeders Y'l and Yl are made of the same type of yarn, it is possible to weave a monochromatic fabric.

In this state, the supply of the weft yarn Y from the yarn feeder Y1 of one series is cut off, and the yarn sensor A1 of the same series is activated.
When the output signal Sal is output (middle row in the figure), the single-color weft insertion selection circuit 12 outputs its selection drive signal Sd2 so as to continuously select only the other series of weft insertion devices.
change. Therefore, at this time, the selection drive signal S
Only the weft insertion device of the series selected by d2 operates continuously, and the operation of the loom can be continued using only the weft Y from the yarn feeder Y1 of the same series.

Next, when the two series of yarn sensors Al and Al are activated and the output signals Sal and Set are output (right column in the figure), the monochrome weft insertion selection circuit 12 outputs the loom stop signal St.
2, the loom is stopped immediately after weft insertion using the weft Y stored in the weft length measuring and storage device.

In addition, in FIG. 3, the weft length measuring and storage devices D and D are
Each pick of weft yarn Y is stored during one cycle of machine rotation angle. Therefore, when two series of weft insertion devices are operated alternately, the operation is repeatedly stopped for each cycle, and one series of weft yarns is When the chisel is used continuously, it is shown to be operated continuously, but when the machine is operated in two series alternately, it is continuously operated at a low speed so that one pick worth of weft Y is stored in two cycles. When one series is in continuous operation, the rotational speed may be doubled for continuous operation.

In the above description, the weft insertion device may have any plurality of lines, including two or more lines. For example, when using a three-line weft insertion device, the single color weft insertion selection circuit 12
When all series of thread sensors Al, Al... are not operating, three series are sequentially selected and operated for each pick, and when thread sensor A1 of one series is operating,
The remaining two series are operated alternately, and the two series of thread sensors Al
, At, the remaining one series may be operated continuously. It goes without saying that the loom stop signal St2 is output when all the yarn sensors Al, AI, . . . are activated.

Even in the case of four or more series, the monochrome weft insertion selection circuit 12 can be formed in accordance with this.

Further, the present invention can be directly extended to a loom for multicolor fabrics that uses a plurality of lines of weft insertion devices for each color of weft Y. That is, in general, in order to weave a multicolored fabric with N-color weaving,
For each color, nl, n2...nN series (ni
≧2, i=l, 2...N) When considering a multicolor fabric loom equipped with a weft insertion device, it is sufficient to prepare the control device 1 according to each of the above embodiments for each color. .

Furthermore, it goes without saying that the present invention is applicable to any type of shuttleless loom, including water jet looms, laths, air jet looms, and rapier looms.

In the present invention, the yarn sensor A1 is used as a signal source for selecting the series of use of the weft insertion device and continuing the operation of the loom. This is because the weft length measuring and storage device generally stores at least 61 picks worth of weft Y, so even if the yarn sensor A1 is activated, it will not function normally until weft insertion immediately after. Because it is guaranteed that it will be done. On the other hand, yarn sensors A2 and A3 detect weft insertion defects including short picks, bent picks, etc., so when these sensors are activated, immediately stop the loom and remove the defective weft. It is necessary to carry out sampling work, and the loom cannot continue operating.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, in the case of monochromatic weaving, in a loom for multicolored fabrics equipped with a plurality of lines of weft inserting devices, the yarn sensor at each input end of each line is By selectively activating only the weft insertion devices of usable series depending on whether or not they are activated, the loom can be operated even if some of the yarn sensors are activated, all of them are not activated, and the weft feeding device is not activated. As long as there is an unbroken line remaining, the operation can be continued, minimizing the chance of unnecessary stoppages and greatly improving the operating rate of the loom. effective.

[Brief explanation of drawings]

1 to 3 show an embodiment, in which FIG. 1 is an explanatory diagram of the entire system, FIG. 2 is a diagram of main parts, and FIG. 3 is a diagram explanatory of operation. Sy... Weft selection signal St, So, St2... Loom stop signal AI... Yarn sensor SW... Mode switching switch Weft insertion control device 11... Weft insertion selection device 12... Single color weft insertion selection device

Claims (1)

[Claims] 1) Weft insertion of a loom for multicolor fabrics, which is equipped with a yarn sensor provided at each inlet end of a plurality of series of weft insertion devices, and a weft insertion selection circuit that selects the weft insertion device to be activated based on a weft selection signal. The control device is provided with a mode changeover switch for switching and specifying multicolor weaving and monochrome weaving, and a monochrome weft insertion selection circuit, and in the case of multicolor weaving, the weft insertion selection circuit selects the weft insertion device. However, in the case of monochrome weaving,
The monochrome weft insertion selection circuit sequentially selects only the weft insertion devices in which the yarn sensors are not activated, and outputs a loom stop signal when all of the yarn sensors are activated. Weft insertion control device for multi-colored textile looms.