SU1416560A1 - Device for untwisting fabric skein - Google Patents

Abstract

The invention relates to textile machinery and can be used in the finishing production of the textile industry to automatically detect the direction of twisting of a bundle of fabric and forcing it to be unwound. The purpose of the invention is to increase the reliability of operation. The device comprises a guide element with a means for wiring the fabric, mounted for rotation about its axis, a sensor detecting the direction of twisting of the twisted bundle and a drive. New in the device is that the sensor is mounted together with the guide element and is made in the form of a pair of spring-loaded rollers. The rollers are made corrugated and each of the nicknames is in contact with a pair of sensitive elements connected according to scheme I. In order to eliminate gravitational and centrifugal forces, the sensor has compensating elements interacting with the corrugated rollers. Due to such an embodiment of the device, its reliable operation is provided, as well as its overall dimensions and intensity of use are reduced. The device can operate in the vertical and horizontal directions of the tow. 1 hp f-ly 5 3 ill. (L with

Description

The invention relates to textile machinery, in particular, to the finishing production and is intended to automatically detect the direction of twisting and | its forced unwinding, and can be used as a part of the finishing machines and finishing machines.

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

Fig. 1 shows a device for unwinding a fabric bundle, cross section; in fig. 2 — Tissue harness direction detection sensor; in fig. 3 is an electrical circuit for connecting sensitive elements with a drive.

The device for unwinding the rope of a weave consists of a guide element 1, installed with the possibility of rotation around its longitudinal axis and mounted in a fixed frame, 2 with the help of bearings 3. The cable harness means is made in the form of rollers 4, fixed with the help of levers 5 on the guide element 1. The rollers 4 are pushed against each other by means of a spring 6. An electric motor 7 is mounted on the fixed frame 2, which is connected to the guide element 1 by means of a V-belt transmission to carry out the rotation of the latter in one or the other direction.

On the guiding element 1 there is a rigidly clamped platform 8 on which the sensor for detecting the direction of twist of the harness is mounted. The sensor consists of two corrugated rollers 9 mounted on axles 10 with the possibility of free movement along them. The ends of the axles 10 are fixed in the upper ends of the levers 11, on the other ends of which compensating elements 12 are mounted. The groove of each corrugated roller 9 includes a sleeve 13 (FIG. 2) 5 to which the tab 14 is rigidly attached to act on the sensitive element (roller movement sensor ) 15, the Sleeve 13 is also included in the groove of the lever 16, on the other end of which the compensation element 17 is installed. The lever 16 is installed

on the axis 18, rigidly mounted on the bracket. 19, on which the sensitive elements 15 are also fixed. The sleeve 13 and the bracket .. 19 are installed

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on the axis 20, the ends of which are fixed in the same way as the axis 10 on the levers 11. The entire system on the levers 11: corrugated rollers 9 on the one hand and compensation elements 12 on the other hand, are fixed on the axis 21, which is rotatably mounted in the supports 22. The supports 22 are rigidly fixed on the platform 8. The entire system is spring-loaded spring 23. The power supply to the sensing elements 15 and the removal of signals is carried out through the tongs 24 (Fig. 1) installed in the fixed frame 2 and the contact rings 25, rigidly mounted on the guide element 1.

The sensing elements 15 in the plan (Fig. 3) are arranged in a rectangular pattern and are located in its corners. The outputs of the sensitive elements 15 (FIG. 3) located diagonally across the rectangle are connected to the corresponding circuits AND of the signal processing unit 26 (selecting the direction of rotation) connected to the corresponding inputs of the reversing amplifier (control unit) 27 connected to the output of the electric motor 7,

The device works as follows.

With the passage of a twisted bundle of fabric in the direction indicated in FIG. 1, under the influence of a bundle (not shown), the bundle rotates, which carries the corrugated rollers 9 and moves them in opposite directions. When the left twist the upper corrugated roller 9 (Fig. 2, 3). moves to the right and bottom moves to the left. Together with the rollers 9, the bushes 13 are moved along axis 20 and their petals 14 act on the sensitive elements 15 (B), the signals from which through the contact rings 25, the brushes 24 are fed to the logic circuit AND of the rotation direction selection block 26. The logic circuit AND block 26 includes a reversible amplifier 27, which connects the electric motor 7 to the network. The last V-belt transmission begins to rotate the guide element 1 with the rollers 4 attached to it and the fabric harness twist direction detection sensor in a clockwise direction. Due to the fact that the rollers 4 are spring loaded among themselves

spring 6, they begin to unwind harness.

During the spin-up of the bundle, it is forced to rotate, which can cause the sensor to fail falsely, since the false movement of the rollers 9. But this does not happen, as these rollers rotate together with the guide element 1 and the rollers 4, which exclude the relative speed of the rollers 9 and tow during the forced rotation of the latter. Therefore, a twist direction detection sensor detects the actual twist of a fabric bundle that is moving along the guide element-1.

In the case of movement of the harness along the corrugated rollers 9, the latter are shifted in one direction, for example, to the right, two sensitive elements 15 (B and B) are triggered, the signals are sent to both logic circuits of the block 26. The signal from the block 26 is switched to the amplifier 27 in this case does not arrive.

In the case when from the false local twists or defects of the fabric itself on the bundle, as well as the stitching points of the end of one bundle with the start of the next one and the bundle vibration from the bundle spreader operation, one of the corrugated rollers 9 is shifted in any direction, then one sensitive element is triggered. 15 and the logic circuit AND block 26 also does not provide a signal to turn on the engine 7.

During the rotation of the rollers 9, centrifugal forces occur, which press the rollers 9 to the edges of the axes 10. To compensate for these forces, compensation elements 17 are installed through the levers 1b. Similarly, during rotation, centrifugal forces arise, directed from the center, i.e. causing the discrepancy corrugated rollers 9 from each other. These forces are compensated through the levers 11 by the elements of compensation 12. The elements of compensation 12 and 17 also compensate for the gravitational forces depending on the installation of the device for unwinding the fabric bundle in a vertical or horizontal position.

The diagonal operation of the sensing elements 15 through the logic circuit AND of the unit 26 for selecting the direction of rotation of the device eliminates false signals for switching on the electric motor 7 from moving the tow along the grooved rollers 9 from false local twists or defects of the fabric itself on the tow, as well as the stitching ends of the harness the beginning of the other and the vibration of the cloth harness from the work of the straightening device, the burner of the injector. .

When the compensation device is placed vertically or horizontally, when the harness is twisted in opposite to the gravitational and centrifugal false side, a friend is triggered.

a pair of sensitive elements 15 (V ;, I. BZ), which give a signal to

The force is as follows. The levers 11 are rigidly fixed on the axis

21 rotating in racks 22; The axles are fixed at one end of the levers 11.

10 and 20 with corrugated rollers 9 on them, sleeve 13 with a petal 14 and a bracket 19. On the bracket 19, sensitive elements 15, a post 18 (axis), a lever 16 and a compensating element 17 are fixed. The mass of all these elements is through levers

11 is compensated by a compensating element 12 with a center of gravity passing along axis 21. Therefore, the clamp between the corrugated rollers 8 (contact

its harness is determined by the spring 23 and is independent of these masses.

During operation of the spinning device, centrifugal forces arise. The mass of all elements fixed on the axes x 10 and 20 creates a torque about the axis 21, the mass of the compensating elements 12 creates its torque about the axis 21, but opposite in sign. These torques compensate each other and the clamp between the grooved rollers 9 (contact with the rope) remains the same.

In the horizontal arrangement of the unwinding device, the center of gravity passes along the stand (axis) 18. At one end of the lever 16 is located, the mass of the corrugated roller 9, the bushings 13 with the petal 14, and at the other end of the lever 16 there is a compensating element 17. Their masses are balanced, using levers 16 on wasps x 18.

The heterogeneity of the harnesses is compensated by the springs of the rollers 4 and the spring, 23 of the detection sensors, the twist directions, which ensure reliable contact of the rollers 4 and 9 with the harness.

The diagonal operation of the sensing elements 15 through the logic circuit AND of the unit 26 for selecting the direction of rotation of the device eliminates false signals for switching on the electric motor 7 from moving the rope along the grooved rollers 9 from false local twists or defects of the fabric itself on the rope, as well as the stitching ends of the rope at the beginning the other and the vibration of the cloth harness from the work of the straightening device of the flagelous regulator. .

When twisting the harness in the opposite direction, a friend is triggered.

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Claims (2)

Claim 1. A device for unwinding a fabric thread containing an actuating unit kinematically connected 1 with a reversible drive of its rotation relative to the longitudinal axis connected to the output of the control unit, a signal processing unit and a control unit for the twist direction of the tow, 1 including grooved rollers placed parallel to one another with a gap for skipping the harness, with sensors for their movement, characterized in that, in order to increase 2 reliability by reducing the influence of lateral displacement of the harness in the Control Zone, grooved roller installed with the possibility of movement in the direction perpendicular to the direction of movement of the tow, the sensors are located at the edges of the movement zone of each grooved roller, and the signal processing unit contains the AND circuitry, the first motion sensor of the first grooved roller and the second motion sensor of the second grooved roller connected to the corresponding the inputs of the first circuit And, the second displacement sensor of the first grooved roller and the first displacement sensor of the second grooved roller are connected to the corresponding inputs of the second circuit And, while the outputs of the circuits AND are connected to the corresponding inputs of the control unit of the reversible drive of the actuating unit. ** 2. The device according to claim 1, characterized in that the grooved rollers and their displacement sensors are mounted on a carriage fixed to the actuating unit. 1 * 416560