JPS6137382B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention involves twisting the rope-like fabric in order to restore it to its original flat state after binding the knitted or woven fabric in a rope-like manner and performing treatments such as scouring and dyeing. The present invention relates to a torsion detector used in a torsion straightening device for correcting.

(Prior art) This type of torsion straightening device is configured as a series in combination with a spreading device, but the performance of the spreading device often depends on the torsion straightening device, and the performance of the torsion straightening device depends on the torsion detector. Its superiority or inferiority is determined by its detection sensitivity.

Conventional torsion detectors use a rope-shaped cloth (hereinafter referred to as "fabric") that is sandwiched between two corrugated plates that have triangular wave shapes on the inside, and then run the cloth along the running cloth so that it fits. If there is, the switch element detects the fact that the corrugated plate tilts from side to side around its support axis due to the action of ``torsion wrinkles''. However, this detector
In the case of a thin rope of narrow width or thin fabric, the torque to tilt the corrugated plate from side to side is weak, and if the amount of twist is large, it will not adjust to the corrugated plate.
The drawback was that it became undetectable.

In addition, a detector has been devised in which twist wrinkles are placed along the uneven surface of the tooth tip of a spur gear to detect twist from the movement of the gear, but in any case, the detection medium is Because it needs to be moved, and the torque is derived from the "twisted wrinkles" of the fabric itself, it could not be detected in the case of a thin rope.

(Object of the invention) The present invention was invented in view of the above situation, and has a high detection sensitivity, and can detect twisting even in the case of a thin rope-like fabric. The present invention provides a twist detector for a fabric restrained in a rope shape.

(Structure of the Invention) In order to achieve the above-mentioned object, the present invention includes a flat plate having a tip portion inserted along the crease gap of a cloth restrained in a rope shape and having reflective surfaces on both sides; A pair of photoelectric switches are disposed on both sides of the tip of the flat plate, irradiate the tip of the flat plate, and are activated by the reflected light.

In the present invention, when twisting occurs in the fabric,
Due to the effect of "twisting wrinkles", the reflection point on one side of the tip of the flat plate is blocked by the wrinkles of the fabric, and therefore only one of the pair of photoelectric switches is activated, thereby detecting the twist. be able to. Furthermore, by knowing which photoelectric switch is activated, the direction of twist can also be detected.

(Example) Examples of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view of a torsion detector according to an embodiment of the present invention, and FIGS. 2 to 4 are explanatory views of its operation.

As shown in FIG. 1, the fabric 1 is guided to a predetermined location by a drum wheel 2 and travels in the direction of the arrow 3.
The flat plate 4 is a thin plate provided with light reflecting plates on both sides, and its tip is inserted along the crease gap of the fabric 1. Reflection type photoelectric switches 5a, 5b are arranged on both sides of the tip of the flat plate 4, and each switch 5a, 5b is activated by reflecting the light at the traveling arrows 6a, 6b. The detection operation will be explained below based on FIGS. 2 to 4, which are views of this state from above.

FIG. 2 and FIG. 3 both show a state in which there is no twist. In Figure 2, the rope-like diameter of the wide or thick fabric is large, the tip of the flat plate 4 is inserted deeply along the crease gap, the light reflection point is blocked by the wrinkles of the fabric 1, and the photoelectric switch is activated. 5
Both switches 5a and 5b are not receiving reflected light, and neither switch 5a or 5b is in operation.

In Figure 3, the rope-like diameter of the narrow or thin fabric is narrow, the tip of the flat plate 4 is inserted shallowly into the crease gap, the light reflection point is not blocked by the wrinkles of the fabric 1, and the photoelectric Both switches 5a and 5b are receiving reflected light, and both switches 5a and 5b are operating.

In this way, in a state where there is no twist, the output signals of each photoelectric switch 5a, 5b are the same, that is,
It can be seen that both are off signals.

Next, FIG. 4 shows a state in which the fabric 1 is twisted. When twisting occurs,
The effect of the "twisted wrinkles" causes the flow to be biased to either the left or the right around the tip of the flat plate 4. Here, a state in which it is tilted in the direction of arrow 7 is shown. In such a state, the photoelectric switch 5a can receive the reflected light, but the photoelectric switch 5b cannot receive the reflected light because its reflection point is blocked by the wrinkles of the cloth 1. For this reason,
Only the photoelectric switch 5a operates, and the photoelectric switch 5
b does not operate. Therefore, if there is twist,
The output signals of each photoelectric switch 5a, 5b are different.
That is, it can be seen that one becomes an on signal and the other becomes an off signal. Furthermore, the twist direction can also be detected based on the on/off signal.

For this reason, the photoelectric switches 5a and 5b
If the output terminal of is connected to an electric circuit consisting of a logic circuit, the presence or absence of twisting and its direction can be automatically detected.

(Effects of the Invention) As is clear from the above description, the detector according to the present invention detects the twisting of the fabric by using the shielding action of the flat plate caused by the fabric itself due to the action of the "twisting wrinkles" of the fabric. Since it is configured to be detected by a photoelectric switch, there is no need for torque to move the detection medium as in the prior art, making highly sensitive detection possible. Therefore,
As mentioned above, detection is possible regardless of the rope-like diameter of the fabric or the amount of twist. Furthermore, the structure of the detector has become extremely simple.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a detector according to an embodiment of the present invention, and FIGS. 2, 3, and 4 are explanatory views of the operation of the detector, respectively. 1... Cloth tied in a rope shape, 2... Drum-shaped wheel, 4... Flat plate, 5a, 5b... Photoelectric switch.

Claims (1)

[Claims] 1 A flat plate whose tip is inserted along the gap between the wrinkles of a rope-shaped cloth and has reflective surfaces on both sides; A twist detector for a fabric restrained in a rope shape, comprising: a pair of photoelectric switches that are activated by the reflected light.