JPH0129253Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically stopping a loom at a desired rotation angle during inching operation of the loom.

When a weft insertion defect occurs during weaving, the worker stops the loom at a convenient angle by inching, and in this state performs work such as removing the defective yarn. In this case, if the loom automatically stops at the desired rotation angle by simply pressing and holding the inching switch, no special skill is required and working time can be shortened.

It is already a known technique to automatically stop a loom when the rotation angle of the loom reaches a desired angle value during inching operation. For example, in 1987
The invention of No. 196182 discloses a means for inhibiting the inching operation for a predetermined period of time when the loom reaches a desired rotation angle position.
In the above-mentioned conventional technology, if the inching switch is kept pressed, the prohibition of the inching operation is automatically canceled and the loom starts rotating again, which poses a safety problem. Additionally, in order to ensure this safety, it is necessary to set a long prohibition time for the inching operation, but if you do this, even if you try to start the inching operation again within the prohibited time, inching rotation will not be possible. Therefore, problems remain in terms of workability and efficiency.

Therefore, an object of the present invention is to eliminate the above-mentioned problems and realize a safe and efficient inching operation.

Therefore, with this invention, when the push button switch for inching is kept pressed, the loom automatically stops at a preset rotation angle, and if the push button switch for inching is not released once, the loom will start moving again. By providing a function that prevents the machine from entering operation, this increases safety during inching operation, and once the push button switch is released, inching operation can be resumed immediately, improving workability and efficiency. I have to.

Hereinafter, the configuration of the present invention will be specifically explained based on the embodiments shown in the drawings.

First, FIG. 1 shows a fixed position stopping device 1 for inching according to the present invention. This fixed position stop device 1 during inching includes an angle signal generation circuit 2 and an inching control circuit 3.

The angle signal generation circuit 2 includes a proximity lever 5 attached to the crankshaft 4 of the loom, and a proximity switch 6 that detects the rotational position of the proximity lever 5 in a non-contact manner and generates an angle signal A. ing.

Further, the inching control circuit 3 includes an inverter 7, mono-multivibrators 8 and 9, an R-S type flip-flop 10, and an AND gate 11. The proximity switch 6 has an input terminal 12
and a set input terminal of a flip-flop 10 via a mono multivibrator 8.
Another input terminal 13 is connected to a reset input terminal of a flip-flop 10 via an inverter 7 and a mono-multivibrator 9. The inverting output terminal of the flip-flop 10 is connected to one input terminal of an AND gate 11. Further, the input terminal 13 is connected to the other input terminal of the AND gate 11 and is further connected to the ground 16 through a resistor 15 . On the other hand, two push button switches 17 and 18 are connected in parallel between the input terminal 13 and the power supply terminal 14. These pushbutton switches 17 and 18 receive the inching command signal B.
They are installed at the left and right positions of the loom, respectively.

Next, the operation will be explained based on the time chart shown in FIG.

When an operator turns on, for example, the push button switch 18 for inching operation, an "H" level inching command signal B is input to the input terminal 13. This inching command signal B is sent to one input terminal of the AND gate 11. When the loom is not at the preset stop rotation angle position, the flip-flop 10 outputs "H" at its reverse output terminal.
A level inching prohibition signal E is generated to set the state in which inching is possible. At this time, AND gate 11
receives “H” level signals at both input terminals, so it generates “H” level inching signal F.
This sets the loom to inching operation. In this way, the loom begins its inching motion.

Now, when the rotation angle of the loom reaches the preset stop rotation angle, that is, when the proximity switch 6 faces the proximity lever 5, the proximity switch 6
An "H" level angle signal A is generated and sent to the mono multivibrator 8. Here, the mono multivibrator 8 generates a jig prohibition set signal C at the "H" level for a predetermined time T1, sets the flip-flop 10 in the set state, and outputs the jig prohibition signal E at its inverted output terminal. Change it to “L” level. At this time, AND gate 11
receives an "L" level signal at one input terminal, so it generates an "L" level inching signal F, and immediately stops the inching operation of the loom at that point. This stopped state continues as long as the inching command signal B remains at the "H" level.

However, when the worker releases the pushbutton switch 18, the "L" level inching command signal B is converted to "H" level by the inverter 7 and is input to the mono multivibrator 9. Therefore, the mono multivibrator 9 vibrates for a predetermined period of time, for example, T2.
During this period, a no-jog reset signal D is generated and sent to the reset input of the flip-flop 10, thereby placing the flip-flop 10 in the reset state. As a result, the jogging prohibition signal E changes to the "H" level again, and all signal input levels are returned to their initial states in preparation for the next jogging operation.

In addition, if the worker turns on the push button switch 18 for a required period of time in this state, the AND gate 11 outputs the "H" level jig command signal B and the jig prohibition signal to both input terminals. In order to receive E, the inching signal F of "H" level continues to be generated corresponding to the ON time of the push button switch 18. Of course, similarly to the previous time, when the push button switch 18 is turned off, that is, when the inching command signal B changes from the "H" level to the "L" level, the mono multivibrator 9 changes to the "H" level. The no-judge reset signal D is generated, but since the flip-flop 10 is already in the reset state, the no-jog reset signal D is invalid in this case.

Incidentally, since the inching control circuit 3 of the above embodiment is merely an example, the settings of the logic circuit elements and signal levels are not limited to those described above, and may be performed using other logics. Further, the fixed position stopping device 1 has the following features:
Although provided for each direction of forward rotation and reverse rotation of the loom, it can also be used commonly by switching the inching command signal B for forward inching and reverse inching.

The present invention provides the following unique effects. When the inching command is given, the loom automatically stops at a preset rotation angle, so stopping at a desired angle does not require skill and can be accomplished in a short time. Additionally, once the loom has stopped at a preset rotation angle, the loom will not resume jogging unless the jogging command is canceled once again, which reliably prevents unexpected rotation of the loom and improves safety. Secured. Furthermore, once the inching command is released after the loom has stopped at a fixed position, the inching operation can be started immediately, so there is no waiting time and the inching operation can be resumed promptly.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a fixed position stopping device during inching according to the present invention, and FIG. 2 is a time chart during operation of the same device. DESCRIPTION OF SYMBOLS 1... fixed position stop device at the time of inching, 2... angle signal generation circuit, 3... inching control circuit, 5... proximity lever, 6... proximity switch, 8, 9... mono multivibrator, 10 ...flipflop, 1
1...and gate, 17, 18...push button switch.

Claims (1)

[Claims for Utility Model Registration] (1) An angle signal generation circuit that generates an angle signal at a predetermined stop angle in synchronization with the rotation of the crankshaft of a loom, and a jig command signal that generates a jig command signal over the jig operation period. A push button switch that generates a jig signal by inputting the jig command signal, prohibits the output of the jig signal when the above angle is received, and cancels the output prohibition when the jig command signal disappears. 1. A fixed position stopping device during inching, characterized by comprising an inching control circuit. (2) The above-mentioned inching control circuit is connected to a flip-flop which generates a inching prohibition signal when set by the above-mentioned angle signal and is reset when the above-mentioned inching command signal disappears, and inputting the above-mentioned inching command signal. The fixed position during inching according to claim 1 of the utility model registration claim, characterized in that the fixed position during inching is constituted by an AND gate that generates an inching signal as described above and prohibits the output of the inching signal when the inching prohibition signal exists. Stop device.