JPH0324613Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a weft selection device for a loom, and more particularly to signal control means on the input side thereof.

PRIOR ART This type of weft selection device is used for multi-color weft insertion, and sequentially outputs a weft selection signal based on a preset weft insertion pattern for a plurality of weft threads in relation to the rotation of a loom. go. Therefore,
The phase of the weft selection output signal of this weft selection device must always be synchronized with the rotational phase of the loom.

Therefore, the invention of Japanese Patent Publication No. 59-211653 makes the phases match by subtracting the count pick number in the memory for storing the weft-setting pattern when weft-setting errors occur or when the loom runs idle. Furthermore, the invention disclosed in Japanese Patent Application Laid-Open No. 59-211654 prevents a phase shift by prohibiting updating of the count pick number in the memory when a horizontal insertion error occurs.

However, in the above invention, the count pick number in the memory is subtracted during forward rotation operation, such as when a lateral insertion error occurs or when the machine is idle, but when reverse rotation operation occurs, the number of picks in the memory is manually decremented. It was a hassle to have to subtract the number of count picks. Further, since computer technology is utilized in some devices, the control device becomes complicated, and it is difficult to implement the device as it is in a relatively simple multi-color horizontal insertion selection device. Therefore, there is a need for a simple control means that eliminates these drawbacks.

Purpose of the invention Therefore, the purpose of the present invention is to provide a simple logic circuit that matches the phase of the weft selection signal of the weft selection device with the rotation of the loom depending on the rotational speed and direction of the loom. The goal is to be able to control it.

Summary of the invention Therefore, the present invention uses two AND gates between the one-rotation signal and the reverse signal of the loom, and by setting a condition between them, it is possible to control the forward or backward movement of the weft thread selection device. That's what I do. When the reverse rotation signal is set to “L” level,
The weft selection device sequentially updates the weft selection signal for each rotation of the loom, but when the reversal signal is set to the “H” level due to reverse operation of the loom, the weft selection device updates the weft selection signal for each rotation of the loom. The phase of the weft selection signal is sequentially retracted for each step. Therefore, no phase adjustment operation is required even when the loom is running in reverse.

Configuration of the Embodiment FIG. 1 shows a weft insertion selection control device 1 of the present invention in relation to a weft selection device 2. As shown in FIG. This horizontal insertion selection control device 1 receives a one-rotation signal A at one input terminal 3 and inputs a reverse rotation signal B at the other input terminal 4. One input terminal 3 directly connects the first
It is connected to one input terminal of the AND gate 5 and the second AND gate 6, and the other input terminal 4 is connected to the other input terminal of the first AND gate 5 by the NOT circuit 7, and directly to the other input terminal of the AND gate 5. gate 6
is connected to the other input end of the And the first
The output ends of the AND gate 5 and the second AND gate 6 are connected to the forward input end 8 and the backward input end 9 of the weft thread selection device 2, respectively. This weft selection device 2 sequentially outputs weft selection signals _C1 , _{C2 ,} .

Effects of the Embodiment Next, FIG. 2 shows the above-mentioned weft selection control device 1.
This shows the signals during operation. When the loom is in forward rotation, the reverse rotation signal B is set to the "L" level, so the first AND gate 5 receives the "H" level signal from the knot circuit 7, and the loom rotates once. A one-rotation signal A of "H" level is sent to the forward input terminal 8 every time. Therefore, the weft thread selection device 2 inputs the one rotation signal A, sequentially updates the output state, and sequentially outputs the weft thread selection signals C ₁ , C ₂ . . . C _o based on a predetermined weft insertion pattern. go.

On the other hand, after the loom stops due to a weft insertion error,
When in the reverse state, the reverse signal B changes to "H" level, so the first AND gate 5 prohibits the passage of the one revolution signal A, and instead, the second AND gate 6 outputs the one revolution signal A to the weft thread. It is fed into the retraction input terminal 9 of the selection device 2. Therefore, the weft selection device 2 inputs the one-rotation signal A and steps the weft selection signals C ₁ , C _{2 .} . . _Co in the opposite direction when the loom is operated in reverse. In this way, the weft thread selection signal C ₁ ,
C ₂ ...C _o is always synchronized with the rotational phase of the loom, and can always ensure a predetermined weft insertion pattern depending on the rotational direction.

Modification of the Idea In the above embodiment, the reversal signal B is set to the "H" level when the loom is reversed. For this purpose, the knot circuit 7 is provided between the input terminal 4 and the first AND gate 5. However, on the contrary, when the reversal signal B is set to the "L" level when the loom is reversed, the above-mentioned knot circuit 7 is provided between the input terminal 4 and the second AND gate 6. In this case, the input terminal 4 is directly connected to the other input terminal of the first AND gate 5, and the connection relationship between the first AND gate 5 and the second AND gate 6 and the forward input terminal 8 and the backward input terminal 9 is , is the opposite of what is shown.

Effects of the invention In this invention, the signal phase of the weft thread selection signal always matches the predetermined weft insertion pattern not only during normal rotation operation but also during reverse operation such as weft repair, so that the signal phase of the weft selection signal always matches the predetermined weft insertion pattern. No troublesome operations are required to match the phases.

In particular, in the present invention, the necessary functions as described above can be obtained by a combination of simple logic circuits, so that the horizontal loading selection control device can be provided at a lower cost than conventional ones. Furthermore, when the spindle rotates, the reversal signal is immediately output at a level corresponding to the direction of rotation, and as long as the direction of rotation does not change, the level of the reversal signal does not change.
The generation timing of the rotation signal can be arbitrarily set regardless of the timing of main movements such as weft insertion, and furthermore, even if an operation such as weft insertion is not performed at the time of reverse rotation, a step motion in the backward direction is possible.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of the weft selection control device of the present invention, and FIG. 2 is a time chart during operation of the device. DESCRIPTION OF SYMBOLS 1...Weft insertion selection control device, 2...Weft thread selection device, 3, 4...Input end, 5...First AND gate, 6...Second AND gate, 7...Knot circuit, 8...Forward Input end, 9...Reverse input end, 10
...Output end.

Claims (1)

[Claims for Utility Model Registration] In a weft thread selection device having a forward input end and a backward input end, an input end for a one-rotation signal is connected to one input end of a first AND gate and a second AND gate, and a reverse signal The input terminal of is connected to the other input terminal of the first AND gate by a knot circuit and directly to the other input terminal of the second AND gate, and further, depending on the signal level of the reversal signal at the time of reversal, A weft inserter characterized in that the output end of the first AND gate is connected to one input end of the weft thread selection device, and the output end of the second AND gate is connected to the other input end of the weft thread selection device. Selection control device.