JPS6125815B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When a special weft thread is passed through a weaving hole, when it is detected whether the thread is normal or an incorrect number such as 0 or 2 threads, a light receiver or light emitting device is installed on the weaving surface. This relates to a thread detector that does not require a container and is equipped with a small reflector so that it does not interfere with weaving.

If a light emitter or light receiver is installed on the thread to avoid unnecessary light such as external light, it will inevitably become a large object that will get in the way during weaving.

This invention reduces interference during weaving by placing a light emitter and receiver under the yarn to be detected, placing a small reflector on top of the yarn, and passing the yarn to be detected between them. Normally, during weaving, the thread is moved under or to the side to further reduce interference and ensure reliable detection of the thread.

This invention will be explained in detail based on one embodiment.

As shown in FIG. 1, a light emitter 2 and a light receiver 3 are provided below the thread to be detected 1,
A reflector 7 is installed so that a light reflecting surface is placed at the intersection 6 of the light emitter 2 and the light emitted from the light emitter 2 hits the reflecting surface and is reflected and enters the light receiver 3.

In this way, the light emitted from the light emitter hits the thread to be detected 1, the remaining light is reflected by the reflective surface 6 and hits the thread to be detected again, and the remaining light passes through the light receiving window 11 and enters the light receiver. Enter 3. As a result, the yarn to be detected blocks the light twice, so the difference in the amount of light received by the light receiver 3 becomes large, the yarn detection becomes reliable, and it becomes easy to determine whether the yarn is normal or abnormal, such as zero or two yarns.

As shown in Fig. 2, when the special weft yarn is inserted into the shed, when the end pincher 12, which pinches and holds one end of the weft yarn, moves to the right due to the yarn end pinching operation, a reflection connected to a part of the weft yarn is reflected. The actuator 13 of the device moves to the right, and the spring 1
4, it hits the stationary part 15 and is stationed at the intersection 6 of the two directional axes. After that, when the yarn detection is finished and beating starts, the end pincher 12 moves to the left and releases the yarn end holding, and the reflector 7 is pushed by the reflector actuator 13 and rotates down to the dotted line position. This will prevent it from getting in the way of subsequent weaving.

As shown in FIG. 3, when the rod 21 moves to the right in conjunction with the operation of the end knob and the lower part of the lever 16 moves to the right, the upper reflector support pin 17 moves to the left and the lever 16 hits the stationary part 18. The reflector 7B is then fixed. When the yarn detection rear end pincher 12 moves to the left, the lever 16 causes the reflector 7B to move to the right and retreat away from the fabric to a position where it does not interfere with weaving.

Moreover, the thread presser 2 provided on the pin 17 of the lever 16
0, when the yarn guiding machine 19 finishes guiding the special weft yarn 1 under the yarn presser 20, the detected yarn 1 is held and stabilized in position by the yarn holding and fixing part 23 located under the presser foot from above.

Also, this thread holding is done by rod 2 as shown in Fig. 4.
1 moves to the right, the thread presser 25 moves upward by the cam 22 provided on it, and the thread holding fixing section 2
4 to hold the thread stably. In this case, the yarn holding and fixing section 24 can hold the yarn to be detected using a yarn 26 stretched in the front-rear direction of the loom at a place where the yarn is clamped, and a yarn presser 25.

As explained above, according to the present invention, threads can be reliably detected without getting in the way during weaving.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the direction in which detection light travels. FIG. 2 is a diagram showing the operation of the rotating reflector. FIG. 3 is a perspective view of a left-right movable reflector, a thread presser, etc. FIG. 4 is a diagram showing the structure of a cam type thread presser. In the figure, 1... Thread to be detected, 2... Light emitter, 3...
Light receiver, 4... Directional axis of emitter, 5... Directional axis of light receiver, 6... Intersection of two directing axes (reflecting surface), 7
...Reflector, 7B...Reflector, 8...Receiver for front and back detection, 9...Color, 10...Spring, 11...
Light receiving window, 12... End knob, 13... Reflector actuator, 14... Spring, 15... Stationary part, 16...
... lever, 17 ... support pin, 18 ... stationary part,
19... Thread guiding machine, 20... Thread presser, 21... Rod, 22... Cam, 23... Thread holding fixing part, 2
4... Thread holding fixing part, 25... Thread presser, 26...
thread.

Claims (1)

[Claims] 1. A light emitter for detection and a light receiver are provided below the thread to be detected, a reflective surface is provided above the thread to be detected, and the number of special weft threads can be determined by the difference in the amount of light entering the light receiver. A special weft detection device characterized by detecting. 2. Claim 1, characterized in that the support part of the detection reflector is rotatable or movable from side to side, and is fixed on the respective directional axes of the emitter and receiver only when detecting threads. special weft detection device.