JPS5895062A - Lap joint part detecting method for strip material - Google Patents

Abstract

PURPOSE:To obtain simple and sure detection of lap joint part of strip members by partly jointing each end portion of a pair of strip members in such a way that a freed portion is formed at the strip end and by having the freed portion projected from a roll surface during strip conveyance so that the freed portion can be detected by a sensor. CONSTITUTION:When strip members 1 are lap jointed 9 with each other for continuous conveyance of strip member 1 made up of long, thin steel etc. each end portion of the strip members 1 is overlapped and partly jointed by means of a suitable jointing means 5, forming a freed portion 2 that is not jointed to the end of the strip member 1 so as to be free. When the lap joint part 9 of the strip member 1 passes outside of a roll 3, the freed portion 2 is projected from the surface of the roll 3 because it leaps outward due to its own springy characteristic. Then a photo sensor 4 made up of both a light projector 6 and a light receiver 7 located near the roll 3 detects the projected freed portion 2 so that a pinch roll 10 can be kept open until the lap joint part 9, for example, passes through the roll 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting overlapped joints of strip materials, and the gist thereof is to detect a pair of strip materials (1).
The ends of the strip material t1) are overlapped and partially connected to form a free part (2) on the edge joint side of the strip material t1) and the outer circumference of the O-ru 13). Turn the hook to invert it into a substantially U-shape, and at this roll 13) position, the roll, 3) the free part protruding from the surface (2) t sensor (
4) A method for detecting a seam part of a strip material is characterized by detecting a seam part of a strip material.

When transporting long strip materials such as thin steel plates by pinching them between a pair of pinch rolls, be careful not to damage the pic pre-rolls by the overlapped parts of the strip material. It is necessary to use pinch rolls to release the overlapped joint when it passes through.

For this purpose, it is necessary to detect the girdle joints of the strip material, and the following methods have been used for this purpose.

■Drill a small hole in the Violet joint, and make a gold photo sensor (
Detection method (emitter, receiver type). In this method, pinholes in the strip material are detected, so there are many false detections, and there are also cases where detection is not possible due to lateral displacement of the strip material. ■A method in which a coloring agent such as ink or Basit is applied to the overlapped joints and this is detected with a color difference meter. This method has the drawback that ink, baseite, etc. dissolve and fall off during the pretreatment of the strip material. ■Method of placing a reflective check on the sub-seam joint and detecting this with a negative reflection type. This method had the disadvantage that the reflective tailor would peel off during the pre-treatment of the strip knob material. ■ A method of detecting thick overlap joints with tt etc. With this method, setting the thickness is complicated. However, the disadvantage is that the equipment is large-scale and expensive.

The present invention has been made in view of the shortcomings of the conventional examples described above, and its purpose is to provide a method for detecting overlapped joints of Metric 1-tub materials, which has a simple structure and can be easily detected. be.

Hereinafter, the present invention will be explained in detail with reference to the accompanying drawings. ＋11 is a strip material such as a long thin steel plate, and next to continuously feed this strip material, it is necessary to joint the entire shape of the strip material (1). To do this, as shown in FIG. 2, 44g of the strip material (1) are stacked one on top of the other, and both parts are partially connected by a connecting means (6) such as a needle of a bathtub or a hollyhose.

As a result, a free part (2) that is not connected and is free is formed at the end of the strip material 11) (for example, a length of 1
= 10-20 m). Strip material like this (凰1
3) Turn the hook around the outer circumference of the O-le in front of the T-Hishichi O-le and invert it into a roughly U-shape.
It looks like the car is running. In the vicinity of the roll 13), a light emitter (6) and a light receiver (7) are installed as a sensor (4) so that the detected light passes just beyond the tangent to the outer periphery of the roll 13).
) and is equipped with a photo sensor that fits inside. Also, the sensor (4) is a natural screw (8).
The position of the monk can be adjusted freely (approximately 3 steps). Therefore, the spliced part (8) of the strip/tub material 11) passes through the outer circumference of the roll +31! do. The free portion 12) protrudes from the surface of the spring τ0-rule 3) due to its spring properties, and is detected by the sensor (4) as shown in FIG. In this way, t! When the brake sensor (4) detects the brazed joint part (9), for example, the piston warning is opened for a certain period of time until the brazed joint part (9) passes and then is released. In the above case, the MtQ joint part (9) of the strip material (1)
) may be provided only on one side as shown in Fig. 3, but if it is provided in the free parts Rt11 on both sides as shown in Fig. By detecting (9), it becomes a dragon.

Note that this detection device can be installed not only in front of the roll t101, but also in front of the roll t101 and the roll t101 to the overlapped joint. Various uses can be considered, such as eliminating the need for clothing.

As described above, in the present invention, the fitting parts of a pair of strip materials are overlapped and partially connected, and a free part is formed at the end of the strip material on the straight joint side, and the strip material t= The roller is turned around the outer circumference of the roll to turn it into a roughly U-shape, and at this roll position, the free part protruding from the surface of the roll is detected by a sensor.
Since the strip material itself is detected, there is no need for the process of adding a number to the strip material, such as with color embellishment or reflective tape, and there is no risk of it falling off and missing detection. The simple structure has the advantage of being able to detect overlapping joints even in 100 cm.
There is no risk of detection.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing one embodiment of the present invention, Figure 2 is a # side view showing the overlapping joint part of the same strip material, Figure 3 is a new view showing the other side of the lap joint part, FIG. 4 is a schematic diagram showing peeling of the present invention. fil... Strip material, (2)... Free part, 3)
...0-ru, (4)...sensor. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) The ends of a pair of strip materials are overlapped and partially connected, a free part is formed at the overlap of the strip materials, and a free part is formed at the outer periphery of the strip material. Turn the hook to invert it into a roughly U shape, and in this roll position
- A method for detecting a straight spliced part of a strip material, the method comprising detecting a free part protruding from the surface of a strip using a sensor.