JPS5929972Y2 - Foil thread front and back confirmation device - Google Patents

Description

[Detailed explanation of the invention] In this invention, after the foil yarn is passed through the weaving opening by the weft insertion device, it is checked in advance whether the front and back sides of the foil yarn are passed through the opening in a normal state before being woven. The present invention provides a foil yarn front and back confirmation device that detects the front and back sides.

The foil yarn used as the weft of the fabric is a filament whose front and back sides are planar, with a colored pattern on the front side and a white paper itO on the back side.

When such a foil yarn is passed through a weave by a weft insertion device, it may be passed through with the front and back sides reversed and woven into the fabric.

In such a case, the woven ivy fabric naturally becomes a defective product.

Therefore, after the foil yarn is passed through the weave by the weft insertion device, it is detected in advance whether the front and back sides of the foil yarn are passed through the weaving opening in a normal state before the weaving process. You need to check the front and back.

Conventionally, the operator's eyes were the only way to check the front and back sides of the foil thread, but this was very tiring for the eyes, so the creator of this idea decided to check the amount of reflected light by checking the difference in appearance between the front and back sides of the foil thread. Focusing on the difference between the two, we devised a device that detects the difference by irradiating a light beam onto the foil thread threaded through the weave.

In such a device, a light emitter and a light receiving element are arranged symmetrically below the foil thread, centering on the foil thread threaded through the weave, and the light beam from the light emitter is irradiated diagonally to the plane of the foil thread. This device uses a light receiving element to receive the light that is reflected diagonally from the plane of the foil thread, and the amount of reflected light varies depending on whether it is on the metallic shiny surface or on the back side of the foil thread, which is a white paper surface (matte surface). Based on the difference in the amount of reflected light, the attempt was made to detect the front and back sides of the foil thread.

However, in such a device, if the foil thread passed through the weave is tilted, even if the foil thread is passed through the weave in an abnormal state (front and back sides are reversed), the light receiving element will receive the reflected light due to regular reflection. It won't let in a lot of light.

In this way, whether the light received by the light-receiving element in that case is the one when the foil thread is in an abnormal state, or the light that is diffusely reflected by the white paper surface when the foil thread is in a normal state. There was a problem that a situation occurred where it was difficult to discriminate, resulting in inaccurate detection.

Therefore, the purpose of this work is to make it possible to always accurately check the front and back sides of the foil threads, regardless of the condition of the foil threads threaded through the weave.

Next, this invention will be explained based on one embodiment shown in the drawings.

As shown in Fig. 1, when the foil thread 1 is passed through the weave, a light 3 is projected onto the lower surface of the foil thread 1 on the lower side of the foil thread l end portion that is exposed outside the selvage. A light emitter 2 and a light receiving element 4 that receives reflected light from the lower surface of the foil yarn 1 are installed on the left and right sides of the loom, and the light emitter 2 is positioned diagonally downward with respect to the foil yarn surface. They are each placed directly below the surface of the foil yarn.

In the figure, 9 indicates an amplifier, and 10 indicates a confirmation mechanism. In this embodiment, the light emitter 2 and the light receiving element 4 are provided below the foil thread 1, but they may be provided above the foil thread 1, or the arrangement of the light emitter 2 and the light receiving element 4 may be reversed. That is, the light-receiving element 4 may be placed at an oblique position with respect to the foil thread surface, and the light emitter 2 may be placed directly below the foil thread surface.

Next, the operation will be explained based on FIGS. 2 and 3.

A: When the foil yarn is inserted in an abnormal state (second
Figure) The surface 5 of the foil thread 1 has a colored pattern and is a colored glossy surface, so the light 3 projected from the light emitter 2 hits the glossy surface of the surface 5, and most of it becomes regular reflected light 6, and the rest is colored. The light is absorbed by the light receiving element 4 and hardly enters the light receiving element 4.

B When the foil yarn is inserted into the weft in a normal state (Fig. 3) The back side I of the foil yarn 1 is a white surface, and the projected light 3 from the light emitter 2 is directed to the white matte back side 7 of the foil yarn 1. When the light hits the light receiving element 4, the light becomes diffusely reflected light 8, is reflected, and enters the light receiving element 4.

In this way, there is a difference in the amount of light entering the light receiving element 4 depending on whether the foil thread 1 passed through the weave by the weft insertion device is in a normal or abnormal state, and this difference in light amount is Thus, the front and back sides of the foil thread 1 can be detected.

The detection means uses an indicator light, a relay, or a solenoid of the confirmation mechanism 10 via a magnifier 9 that communicates with the light receiving element 4.If the condition is normal, the loom is operated, and if the condition is abnormal, the loom is not operated. There is.

As mentioned above, in this invention, the reflected light from the front and back sides of the foil thread,
Changes in the amount of reflected light are detected by determining the difference in the amount of reflected light received by the light-receiving element, which is constructed by arranging the light emitter and the light-receiving element in an oblique direction and a direction perpendicular to the plane of the foil yarn. Even if the foil thread is passed through the weave at an angle, the amount of diffusely reflected light from the back surface of the foil thread, which is received by the light receiving element, will not change significantly. It is clear that this is the case when the foil thread is in a normal state, so the difference in light intensity can be clearly distinguished, and it is clear whether the foil thread is in an abnormal state or in a normal state. They are distinguished.

Therefore, regardless of the condition of the foil thread threaded through the weave, the front and back sides of the foil thread can always be accurately detected and confirmed.

And the device is simple.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and Fig. 1 is a perspective view showing the usage state of the device of this invention, Fig. 2 is a side view of the main part showing the detection state when the foil thread is in an abnormal state, and Fig. FIG. 3 is a side view of the main part showing the detection state when the foil thread is in a normal state. 1...Foil thread, 2...Light emitter, 3...Projection light, 4...
... Light receiving element, 5 ... Foil thread surface, 6 ... Regularly reflected light,
7... Back side of foil thread, 8... Diffuse reflected light.

Claims (1)

[Scope of utility model registration request] It has a light emitting device 2 that projects light 3 onto the plane of the foil yarn 1 that is exposed outside the selvedge in which the foil yarn 1 is passed through the weave, and a light receiving element 4 that receives reflected light from the foil yarn plane. The light emitter 2 and the light receiving element 4 are arranged at an oblique direction and a perpendicular direction to the plane of the foil thread, respectively, so that the regularly reflected light 6 in the glossy direction of the surface 5 of the foil thread 1 does not enter the light receiving element 4. First, a foil yarn characterized in that the diffusely reflected light 8 from the white back surface I enters the light receiving element 4, and the front and back sides of the foil yarn 1 are detected based on the difference in the amount of light entering the light receiving element 4. Front/back confirmation device.