JPH0367414A - Manufacture of flat cable - Google Patents

Abstract

PURPOSE:To divide a flat cable into multiple portions without requiring the adjusting work of positioning when connection sections meander by tearing the flat cable connected with multiple insulated core wires in parallel with a flexible cord at a connection section. CONSTITUTION:A flat cable 3 arranged in parallel with seven insulated core wires 1 connected in turn with fusion sections 4 and loose wire sections 5 in the longitudinal direction via connection sections 2 with the thickness smaller than the outer diameter of the insulated core wire 1 is guided to a flexible cord 6 made of polyamide resin fixed by a pair of shafts 7 and 8 at both terminal sections. Since the length of the cord 6 is longer than the distance between shafts 7 and 8, when the cord 6 is moved along a connection section 2 of the cable 3, the connection section 2 is pulled by the cord 6 in the moving direction and torn. Even when the cable 3 meanders by the meandering of a production line, the cord 6 follows the meandering because of its flexibility, and the cable 3 can be efficiently torn and divided at the position of the connection section 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a flat cable, and more particularly to a method for manufacturing a flat cable that can produce multiple flat cables. [Conventional technology] Conventionally, a flat cable manufacturing method in which a flat cable consisting of several insulated core wires is divided into multiple cables is produced by connecting a plurality of insulated core wires and arranging them in parallel. A method is known in which a flat cable is guided to a cutter fixed to a fixed member, and the cutter blade tears the connection between the insulated core wires and divides the flat cable to produce multiple flat cables. [Problems to be Solved by the Invention] However, in the conventional flat cable manufacturing method described above, in order to produce multiple cables, the positioning must be adjusted so that the cutter blade is located at the joint between the insulated core wires. However, due to continuous work, the manufacturing line fluctuates slightly and the flat cable meanderes slightly along with the manufacturing line, so the position of the joint and the cutter blade that were initially aligned is different. If the cutter blade becomes misaligned, the cutter blade may tear the insulation of the insulated core wire and expose the conductor, so there is a problem in that it takes a lot of time to adjust the position of the connecting part and the cutter. In addition, because the width of the connecting part is extremely small, it is extremely difficult to align the cutter and fix it on the connecting part. The present invention aims to improve the drawbacks of the prior art described above and to provide a method for manufacturing a flat cable that can efficiently produce a large number of flat cables. [Means for Solving the Problems] The present invention has a method of dividing a flat cable formed by connecting a plurality of insulated core wires and arranging them in parallel into flat cables each having at least two or more insulated core wires. It is constructed so that multiple flat cables can be produced by tearing the connection between the insulated core wires using a flexible string. As the insulated core wire, an insulated core wire in which the outer periphery of the conductor is coated with an insulator, and a wire in which an outer conductor and a sheath are sequentially formed on the outer periphery of the insulated core wire are used. Flat cables include those in which multiple insulated core wires are fully fused in the longitudinal direction to form a connecting portion, or those in which multiple insulated core wires are intermittently fused in the longitudinal direction to form a fused portion. A connecting portion is formed, and a fused portion and a loose wire portion are alternately provided. As the flexible string, a plastic string such as polyamide resin or a metal wire such as a soft aluminum wire is used. [Function] In the present invention, with the above configuration, even if the flat cable meanderes along with the meandering of the production line, the flexible string can follow and move, so that the connection between the connecting portion between the insulated core wires and the flexible string can be improved. The joints can be separated by tearing them with a flexible string while always keeping the positions the same. Therefore, there is no need to adjust the positioning of the flat cables, and it is possible to efficiently take out multiple flat cables. [Example] Fig. 1 shows an example of the method for manufacturing a flat cable of the present invention, and Fig. 2 shows an example of the flat cable used in the invention. 1 is an insulated core wire, 2 is a connecting part, 3 is a flat cable, 4
5 is a fused portion, 5 is a loose wire portion, 6 is a flexible string, and 7.8 is a shaft. As shown in Fig. 2, the conductors are connected by a connecting part 2 having a thickness smaller than the outer diameter of the insulated core wire 1 whose outer periphery is coated with an insulator, and the fused part 4 and the loose wire part 5 are alternately arranged in the longitudinal direction. A flat cable 3 formed by arranging seven insulated core wires 1 in parallel is guided to a flexible string 6 made of polyamide resin whose both ends are bound and fixed to a pair of shafts 7.8. At this time, the connecting portion 2 between the third insulated core wire and the fourth insulated core wire of the flat cable 3 is guided by the flexible string 6. Further, since the length of the flexible string 6 is longer than the distance between the shafts 7.8, when the flat cable 3 moves to the left in the figure, the flexible string 6 is also pulled in the moving direction. Then, the connecting portion 2 between the third insulated core wire and the fourth insulated core wire is torn with the flexible string 6, and the flat cable is divided into two pieces. [Effects of the Invention] As explained above, according to the method for manufacturing a flat cable of the present invention, a flat cable formed by connecting a plurality of insulated core wires and arranging them in parallel can be made by connecting at least two or more insulated cores. The structure allows multiple flat cables to be taken out by tearing the connection between the insulated core wires with a flexible string to separate them into flat cables consisting of wires, making it flexible even when the flat cable meanderes along with the meandering of the production line. Since the flexible string can also follow the movement, the connecting portion between the insulated core wires and the flexible string can be always aligned in the same position, and the connecting portion can be torn and divided by the flexible string. Therefore, there is no need to adjust the position of the flat cables, and it is possible to efficiently take out multiple flat cables.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing one embodiment of the method for manufacturing a flat cable of the present invention, and FIG. 2 is a cross-sectional explanatory diagram showing one embodiment of the flat cable used in the present invention. 1: Insulated core wire 2: Connecting portion 3: Flat cable 4: Fusion portion 5: Loose wire portion 6: Flexible string 7.8: Shaft

Claims (1)

[Claims] (1) A flat cable consisting of multiple insulated core wires interconnected and arranged in parallel is divided into flat cables each consisting of at least two or more insulated core wires using flexible strings between the insulated core wires. A method for manufacturing a flat cable, which comprises tearing the connecting portion to produce multiple flat cables.