RU1798409C - Device for checking weft threads on a loom - Google Patents

Abstract

SUMMARY OF THE INVENTION: the sensor of the presence of threads of the control device is made in the form of a double lever, carrying an executive and supporting stops on each arm, which are influenced by the threads, and superprotective planes interacting with the photosensor. The device provides stopping accuracy with a high density of threads, reducing material consumption, low cost of the device. 4 ill.

Description

The invention relates to the textile industry, in particular to regulating and actuating devices, and is intended to control the breakage of weft threads and the stopping of a weaving machine.

The aim of the invention is to simplify the design.

In FIG. 1 shows a general diagram of a device; in FIG. 2 is a section AA in FIG. T, the ability to work with a high density of threads is shown, the arrangement on both sides of the stops is shown; in FIG. 3 is a view B in FIG. 1, from above, two shoulders of a lever are shown., Each of which carries an executive and supporting emphasis, on which the threads act; in FIG. 4-triggering of the overturning moment with the help of a thread and an executive stop when the thread is broken on the opposite arm of the lever, The light-shielding plane of the lever arm blocks the light flux of the light sensor. The device consists of a housing 1, made in the form of a two-shouldered lever, shoulders

which are developed in the light-shielding plane 2, overlapping the light flux of the photo sensor; and 3. On the shoulder of the housing 1, the executive stop 4 and the supporting stop 5 are stamped from opposite sides of it 5. The housing 1 is mounted on an axis 6, whose ordinate implements an angle of attack of thread 7 stops 4, 5.

The principle of operation is as follows. Each of the threads 7, 8 from the spool is stored on one of the arms of the housing 1 s through the executive stops 4 and the supporting stops 5 with subsequent filling into the working part of the machine. When passing. threads at stops 4 and 5, the lever housing is in equilibrium.

Turning the housing 1 to one side due to a change in the tension of one of the threads causes a sharp increase in the recovery moment on the opposite shoulder of the housing 1, determined by the tension of the other thread and the shoulder, the distance to the support

yoo

 about y

the stop from axis 6, which returns housing 1 to equilibrium.

When one of the strands breaks, the housing 1 rotates around the axis as a result of the overturning moment determined by the tension of the unbroken thread and the shoulder, determined by the distance from axis 6 to yriopa 4.

In this case, the response time (overturning of the housing 1) of the sensor is much shorter than the time required to capture the dangling thread by the neighboring ones and to entrain the latter into the limiting part of the machine.

When the housing 1 is overturned, the light protection plane 2 blocks the light flux of the photosensor 3, which, through the automation system, causes the machine to stop.

The present invention provides a simplified design, accurate and reliable stop of the machine with a spacing of 0.9 threads

0

5

0

mm and more, improving manufacturability, reducing material consumption.

Claims (1)

SUMMARY OF THE INVENTION A device for monitoring weft threads on a weaving machine, comprising a thread presence sensor made in the form of a two-shouldered lever, each shoulder of which has means for interacting with the weft threads, and a signal processing unit, characterized in that, in order to simplify the design, the axis the two shoulders of the lever is horizontal, each means for interacting with the weft threads is made in the form of executive and supporting stops, and each shoulder of the two shoulders of the lever has a light shield, while signal processing has photosensors arranged on either side of the axis of a two-armed lever with the possibility of overlapping the light shielding screen. Figure 1 View B t Ljx J.