CS256066B1 - Device for controlling weft insertion - Google Patents

Abstract

The weft clogging control device enables weft control for unorthodox weaving machines, especially rapier and needle looms. The device works on the optoelectronic principle by means of reflection or interruption of electromagnetic radiation, which is indirectly induced by the weft guide.

Description

(54) Weft clogging device

The weft insertion monitoring device allows weft inspection for unorthodox weaving machines, in particular gripper and needle. The device operates on the optoelectronic principle by reflection or interruption of electromagnetic radiation, which is induced indirectly by the weft conductor.

OĚtiJ.

250066

BACKGROUND OF THE INVENTION The present invention relates to a device for controlling weft insertion in non-orthodox machines, mainly with scribe weft or needle weaving machines, in which it deals with weft picking in shed change.

Up to now, weft stoppers and transducers operating on the trieboelectric principle or piezoelectric principle have been known, where, when the weft passes through the transducer, a pulse is generated by friction, which is further processed. Furthermore, mechanical weft stops operating with different needles and latches are known, whereby the machine is stopped mechanically.

The disadvantages of these sensors are that, when using a mixing device, each attack must pass through a sensing point where friction generates a voltage pulse. In the weaving of very fine yarns, considerable tension is required to induce the function, and therefore the attack is very stressed, causing frequent breaks. These breaks are due to increased tension in the weft. The types of mechanical stops have a great disadvantage in the inertia of the mechanisms and thus can be used for new machines with a higher working speed.

The disadvantage of the present invention is to eliminate a tab control device according to the invention, wherein the sensor comprises an electromagnetic radiation transmitter directed towards at least part of the weft conductor and an associated electromagnetic radiation receiver for generating a voltage pulse generated by vibrations of at least part of the weft conductor.

An advantage of the weft insertion inspection device according to the invention is that it operates on the oploelectronic principle and indirectly senses the weft movement into the shed of the weaving machine while not increasing the weft tension. The weft insertion inspection device is mounted on a weaving machine at a location such as e.g. conducting a multi-color swap, loop, or brake, where it leaves its own machine to tremble relative to that of at least a portion of the driver during weft transition and operates independently of the speed of the weaving machine.

An exemplary embodiment of a weft insertion inspection device according to the invention is shown schematically in the accompanying drawings, in which: FIG. 1 shows the location of the machine on a weaving machine, FIG. 2 shows a section through a weft insertion control, and FIG. 3 shows the device with the orifice plate in cross-section. The sensor 1 comprises an electromagnetic radiation transmitter 9 and an associated electromagnetic radiation receiver 10, which are directed at an angle 14 to each other. a trimmer 12, a signal lamp 11 and an electronics 13, the cable 8 being connected to the evaluation of the weaving machine 7.

Attachment 4 when shoveling into the sheave of the weaving machine by means of the guiding device 5 causes the weft guide 3 to vibrate in the movement direction 2, changing the electromagnetic radiation ejection 14 and generating a voltage pulse. Actually, the vibrations of the weaving machine are electrically eliminated and the level is adjusted by means of trimmer 12 and the level is visually checked by indicator lamp 11. The voltage pulse is processed by the electronics 13 of the sensor 1. In addition to the electronic circuit, the sensor 1 protects the shade 15. the electromagnetic radiation and the electromagnetic radiation receiver 10 facing each other, the shutter 16 interrupts the electromagnetic radiation depending on the weft reversal.

The weft insertion control device comprises a sensor which consists of an electromagnetic radiation transmitter and an electromagnetic radiation receiver positioned side by side at an angle of 180 ° or opposite to each other for sensing or interrupting electromagnetic radiation by changing or interrupting the electromagnetic radiation reflection. the electromagnetic radiation receiver, a voltage pulse which is further processed in the sensor electronics. In fact, the machine vibrations are avoided electronically when the weft is not thrown, and the vibration variation as well as the vibration intensity is controlled automatically by the electronic circuit and eliminated. The preliminary measured state of vibration sensitivity is set by an electronic circuit with a trimmer. At least one sensor is located on the machine, depending on the weft fineness and machine vibrations.

Claims (3)

258066 5 OBJECT Apparatus for controlling the weft insertion of an unorthodox weaving machine, the most gripper or needle, comprising a sensor connected to an evaluation circuit, characterized in that the sensor (1) comprises an electromagnetic radiation transmitter (9) directed at at least a part of the conductor (3) of the housing (4) an electromagnetic radiation receiver (10) for generating a voltage pulse of the generated vibration and at the same time a portion of the weft driver (3). 2. The weft insertion control device according to claim 1, wherein the electromagnetic radiation transmitter (9) and the electromagnetic radiation receiver (10) are associated with each other at an angle (14) of up to 180 °. 3. A weft inspection device according to claim 1, characterized in that the electromagnetic radiation transmitter (9) and the electromagnetic radiation receiver (10) are associated with each other and the weft conductor part (3) of the weft (16). . 3 sheets of drawings