JPS58109829A - Overtension detector of element wire - Google Patents

Abstract

PURPOSE:To discontinue the manufacturing process of a twisted wire conductor when a guide roller reaches its moving limit point, by setting previously said limit point at the upper and lower sides of the guide roller respectively for production of the twisted wire conductors. CONSTITUTION:An element wire 1 is made to pass a guide roller 2 supported by coil springs 3 and 3' to keep balance. Under such conditions, if the tension of the wire 1 is approximate to the spring constants of the springs 3 and 3', no problem arises in the manufacturing process. If the abnormal tension, i.e., the tension exceeding the spring constant, the roller 2 moves down and up with overtension and undertension respectively. In this connection, detectors 4 and 4' such as limit switches, photoelectric tubes, etc. are provided previously within the limit point of tension to detect the overtension and undertension. Thus the line of production is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting excessive tension in strands during the production of stranded conductors of electric wires or cables.

Conventionally, when manufacturing stranded wire conductors for stranded electric wires or cables, it is common to manufacture the strands with an appropriate tension applied to the strands. That is, if the tension applied to the strands is too weak, it will become unstable, and if it is too strong, the strands will groan and possibly break.

The first device that was used to adjust this tension was the
As shown in the figure. In FIG. 1, a constant tension is applied to the wire 1 by hanging it over a guide roller 2 suspended by a spring coil B. However, with this device, it is fine if the tension of the strands and the tension of the spring coil are balanced, but if an abnormal tension that exceeds the spring constant of the spring is applied to the strands, the tension adjustment with the spring becomes impossible. , when the tension is too high, the wire breaks,
If the amount is too low, there is a drawback that damage may occur due to the wire coming off the guide roller.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire tension adjustment device that eliminates the drawbacks of the prior art described above and prevents damage caused by wire breakage or guide roller dislodgement in the production of stranded conductors for electric wires or cables. It is in.

That is, the gist of the present invention is to set a guide roller movement limit point in advance in the vertical direction of the guide roller, and to stop the stranded wire conductor manufacturing process when the guide roller reaches point 7.

The present invention will be explained below based on embodiments shown in the figures.

FIG. 2 shows a wire tension adjustment device according to the present invention. Second
In the figure, a wire 1 is passed through a guide 20-2 supported by coil springs 6 and 6' to maintain balance. In this state, the tension of the wire is 6.6
If the spring constant is around the spring constant of
When there is too much, it moves downward, and when there is too little, it moves upward. Therefore, detectors 4, 4' such as limit switches or phototubes are provided in advance within the seven limit points to detect excessive or insufficient tension and control the production line.

According to the present invention, when manufacturing stranded wire conductors for electric wires or cables, if abnormal tension that cannot be absorbed by spring coils is applied to the strands, a preset detector such as a limit switch is activated and the equipment is stopped. Therefore, it is possible to prevent the strands from suffering from groaning or breaking due to excessive tension, or from injury caused by separation from the guide roller due to insufficient tension.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional wire overtension detection device. FIG. 2 is a schematic diagram of an overtension detection device for a strand according to the present invention, in which a detection device is provided at the moving point of the force-id roller. 1... Element wire 2... Guide roller 6... Coil spring 3'... Coil spring 4... Detector such as limit switch

Claims (1)

[Claims] A guide roller that guides the wire is balanced and supported by a spring below L, and the excessive tension applied to the wire is absorbed by these springs, and a guide roller detector is provided at a scheduled position above and below the balance position of the guide roller, An over-tension detection device for strands during the production of stranded conductors of electric wires or cables, characterized in that over-tension is detected by movement of guide rollers.