SU1326666A1 - Device for monitoring two simultaneously inserted weft yarns - Google Patents

Abstract

This invention relates to the textile industry. The purpose of the invention is to improve the reliability of the control. With the passage of tensioned strands 1 and 2 tightened with a certain amount, the two shoulders lever 4 swings around its steady position. When one of the strands 1 or 2 is broken, the balance of the lever 4 is disturbed. The sensor 12 the presence of the weft thread generates a signal about the rotation of the lever 4. This signal is fed to the input of the logic unit 11, which turns on the unit 14 to stop the loom. The flow control of the weft threads is performed by the sensor 7 of the flow of the weft thread, which is connected to the input of the logic unit 11. The monitoring time is set by the sensor 10 of the position of the main shaft of the cup. 1 hp ff, 1 ill. c (L 00 to Oi and Od o: i

Description

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The invention relates to the textile industry.

The purpose of the invention is to increase the reliability of the control.

The drawing shows the construction and block diagram of the device.

Controlled weft yarns 1 and 2 have a thread guide 3. The device contains two shoulders U-shaped lever 4, whose arms are mounted between the thread guide mn 3 and 5 with the possibility of rotation, the mechanism 6 accumulation and laying of weft threads, the sensor 7 of the thread weft thread, emitter follower 8, shaper 9 pulses, sensor 10 of the position of the main shaft of the machine, logic block .11, performed, for example, as an AND-NO element, sensor 12 of the presence of the Exact filament emitter follower 13 and block 14 of the weaving machine. The mechanism 6 consists of the thread guide 15, the measuring mechanism 16 and the confuser 17.

The output of the sensor 7 through the repeater 8 and the driver 9 is connected to one input of the block 11, the other input of which is connected to the output of the sensor 12 via the repeater 13, the third input of the block 11 is connected to the output of the sensor 10, and the output to the input of the machine 14 stop 14

The device works as follows.

The weft yarns 1 and 2 round the shoulders of the lever 4 from the outside and pass through rollers made in the arms of the lever 4. The difference in pressure (tension) of the threads on the arms of the lever 4 is compensated by different bending angles of the weft threads 1 and 2, created by horizontally adjustable thread guides 3 and 5, the thread guides 5, installed after the double-arm 4, are also designed to regulate the tension of the weft threads and prevent the threads from twisting. Next, two weft yarns enter the weft accumulation mechanism 6 and the weft pads. The duck's flight is controlled by a sensor 7, based, for example, on a photoelectric effect, the signal from which is sent to the emitter follower 8 and then to the pulse shaper 9, in which an electric signal is generated in accordance with the duck

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or obryshnost. At the same time, a pulse is generated from the sensor 10 of the shaft position, the action of which is synchronized with the revolutions of the main shaft of the weaving machine. If there is no undershoot during the laying of the weft, then the generated impulse of the sensor 7 of the flight comes in the time interval Q QIS of the pulse width of the sensor 10 of the shaft shaft to the logic unit 11, and the signal to the block 14 is not received. In the event of a duck undershoot, the sensor 7 does not form an information

A g signal and a block 11 generate a control signal of a block 14 that stops the machine.

Consider the operation of the device, taking into account the control weft threads. With the passage of the weighted yarns 1 and 2, tightened with a certain force, the two shoulders lever 4 swings near its working stable position, and the tension forces of the chains are equal in magnitude and are controlled by the thread guides 3 and 5. When one of the threads 1 or 2 is broken, the balance in the two shoulders The lever 4 is broken, since the difference between the broken and moving threads becomes significant, which causes the two shoulders 4 to rotate around its axis. Sensor 12, installed depending on the version on one of the arms or on the axis of rotation of the two shoulders, 35 hectares 4, generates an information signal from the rotation of the arm 6, I, indicating a breakage of one

from weft yarns or a significant decrease in the tension of the yarns. This signal is sent to the emitter follower 13, and then to the input of block 11 and after logical processing, a turn on signal of block 14 is sent, followed by stopping the machine.

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Claims (2)

1. A device for monitoring two simultaneously laid weft threads, preferably on an shuttleless loom, containing for each weft thread successively installed thread guides, sensors for the presence of the weft thread and the position of the main shaft of the machine, the outputs associated respectively with the first and second inputs of the logic unit, the output of which connected to the input block os313266664 Tanova loom, about tl and h a-weft thread is installed in the area of the loop with the fact that, in order to increase one of the arms of the two shoulders, the reliability of the control, it is equipped with the sensor is connected to the sensor of the flow of the weft thread and the daily thread is connected to the third inlet two-arm P-arm lever, the arm of the logical block, which is installed between the respective 2. The device pop. 1, characterized by thread guides with the possibility that the logical block turns, and the presence sensor is fulfilled as an AND – NO element,