CS261078B1 - Weft sensor - Google Patents

Abstract

The weft thread presence sensor uses the optoelectronic sensing principle. It is intended mainly for air-powered weaving machines with a shaped beam. It is characterized by the fact that the weft thread control section begins at least halfway down the length of the warp threads, when the position of the inserted weft thread is stabilized from the point of view of control. All parts of the sensor are fixed during weaving and do not move, which significantly extends the life of the sensor, especially the supply cable. The electrical impulses of the weft thread presence sensor are evaluated by the electronics of the weft stopper, which forms a separate structural unit.

Description

4 261078

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic weft baffle for unorthodox weaving machines, including weft yarn by means of a compressed air and a shaped spoke with a plugging channel and a relay relay arrangement of compressed air directing the nozzle, where in a specified position of the weaving machine The absence of a weft yarn sensor means that weft yarn is missing at the control point, which the subsequent weft yarn electronic circuitry evaluates and pulses to stop the weaving machine.

The known weft yarn detectors for unorthodox weaving looms with compressed air, with the aid of a welded spreader with an insertion channel and a set of relayed nozzles, utilize the optoelectronic principle of detecting the presence of weft yarn in the channel during its flow between the detection organs in the clogging the position of the shaped beam. The detection space is large, the weft materials being woven with occasional clogging of the weft yarn by the non-wicking channel of the shaped spoke, but in the yarn of the warp yarns, which these sensors detect as the absence of weft yarn and stop the weaving machine without a cause. The sensor part of the known optoelectronic sensors is mounted on the moving parts of the weaving machine and electrically to other parts of the sensor and the weft stop fastened to the stationary part of the machine connected by copper conductors. Weaving conductors are still moving - they bend to shorten their lifespan The proven lifetime of these cables is about 1.5 years.

The significant disadvantages of the known optoelectric sensors for weaving machines with air-weft insertion of weft yarn with a welded spoke and a system of nozzle nozzles is the non-coverage of the entire weft-insertion space of the weft yarn, resulting in unnecessary setting of weaving machines, which reduces their performance and the low lifetime of the connecting cables due to their alternating bending during weaving.

It is also an object of the present invention to provide a weft yarn sensor which is remodeled by weaving machines with weft yarn clogging by means of a compressed air welded spreader with a feed channel and a re-arranged air-jet nozzle, which eliminates the above-mentioned disadvantages. creates a control section more suited to sensing the presence of weft-optoelectronic elements while removing the stress of the cables on the bend.

The essence of the weft sensor for unorthodox weaving machines with weft yarn clogging with compressed air by the help of a molded spool with a clogging channel and a relay relay arrangement of compressed air deflecting nozzles is that the sensor body has a phototransistor name. and the diode arm defining the insertion space at a distance of at least the length of the length of the lumen in front of the shaped radius in the insertion position of the batten. The sensor body is mounted on a stationary mount.

The weft yarn detector according to the invention makes it possible to control; the presence of a thread of yarn at a time of closing but closing of the warp thread, wherein the thread is pushed by the molded spoke to the fabric face into the beat-up positioning device, and whereas the sensor of the invention is mounted on the stationary support of the maker of the leno thread but or separate with a shaped beam non-movable holder, it passes between the optoelectronic elements, thereby changing the intensity of the electromagnetic radiation to a phototransistor that generates an electric pulse.

The weft yarn sensor of the present invention does not move during weaving so that the lead and interconnect cables have an inevitably greater lifetime which can be neglected by negligent handling.

In the drawing, there is a side view of the insertion mechanism of the weaving machine with the sensor of the invention, from its right-hand side, where the sensor body 1 with the phototransistor arm, the diode arm 3 and the deflection slot 13 define the insertion space 12 in which the insertion position In this case, the sensor body 1 is fixed to the non-movable bearing holder 4 of the live-thread yarns. A molded spoke 6 is attached to the movable spindle 6 with the insertion channel 7 and the nozzle nozzles 8. The threads 8, 10 form a living thread.

In weaving, the batten 5 with the shaped beam 6 and the blowing nozzles 8 is moved from the insertion position drawn by the pads to the beat position drawn in the line and slept, each time at the working speed of the weaving machine. The weft yarn 11 embedded in the warp threads 9, 10 and the sensor receiving space 12, by the duct 7 of the shaped beam 6 and the compressed air through the directed nozzles 8 is carried to the piercing position of the batten 5. When the thread 11 is moved between The phototransistor and the diode entering the drainage screen 13 change the intensity of the electromagnetic radiation to the phototransistor, thereby generating an electrical pulse that is processed and evaluated in the follow-up electronics of the weft rack as information about the presence of the weft. this pulse is missing, the weft stopper electronics sends an impulse to stop the weaving machine.

Claims (1)

2 δ i 3 7 S 5 OBJECT The weft yarn detector for non-orthodox weaving looms with compressed air weft embossing with a wedge duct with a set of relay-arranged, compressed air guiding nozzles is characterized in that the sensor body (1) of the phototransistor and the arm (3) are discharged by the diodes which, with the aperture (13), dislodge the insertion space (12) in the air at least half the length of the preformed beam (6) in the insertion device the housing (5), the sensor body (1) being fixed to the stationary housing (4). 1 sheet of drawings