JPH04144013A - Manufacture of bamboo-blindlike flat cable - Google Patents

Abstract

PURPOSE:To prevent the running of water due to capillarity of a solvent by the recesses formed in the core wires for preventing the running of water and thereby causing the mutual adhesion with accuracy of adjoining core wires over only a desired length by opening the recesses with respect to a boundary portion between an adhesion portion and a non-adhesion portion of the adjoining core wires and then supplying a solvent between the opposing recesses. CONSTITUTION:A core wire 1 which has intermittently been delivered from a corresponding bobbin 7 in required number is passed through an interspace between two guides 8 spaced at a prescribed interval away from each other in an opposed manner, and is arranged in one horizontal row. Next, a jig tool 9 is lowered from above the core wires 1 and a number of heating pins 10 provided to the jig tool 9 are each inserted several seconds between each core wire 1. Then, the jig tool 9 is lifted up to cause the draw-off of the pin 10 from the recesses 5 produced. Thereafter, a solvent is supplied between the opposing recesses 5 of the adjacent core wires 1, thereby causing adhesion of only the core wires 1 having each recesses. Subsequently, the coated solvent is dried to complete the adhesion. If, in this way, a bamboo-blindlike flat cable is produced, water running attributable to the capillarity of the solvent will be prevented by the recesses and the adhesion will be ensured with respect only to an adhesion portion 3 having a desired length.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method of manufacturing a sagging flat cable used, for example, in electronic equipment.

[Conventional technology]

As shown in Fig. 4, there is a flat cable in which a jacket 2 of a large number of wire cores arranged in a horizontal row is fused to each other along its entire longitudinal length, or a jacket of a large number of wire cores arranged in a horizontal row. Conventionally, there is a sag-shaped flat cable in which sag-shaped portions are fused together at arbitrary intervals in the longitudinal direction, and the sagged portions are provided in a separated state by leaving the fused portions as they are without being fused. Conventionally, there have been two methods for manufacturing this sagging flat cable. ■ A method in which slits are made at arbitrary intervals in the flat cable without the sag-like portions described above, and only those portions are separated to form the sag-like portions. (2) A method in which a large number of wire cores coated with extruded insulators or sheath materials (jackets) are lined up in a main tank, and the wire cores are fused at arbitrary intervals in the longitudinal direction. Furthermore, the fusion method described in (1) specifically includes the following method. a. As shown in Fig. 5, move the heat press machine A in the longitudinal direction of the wire core I and move it up and down at predetermined intervals to press the heat press machine A against the wire core I at predetermined intervals. At this time, the insulator or sheath material of the wire core 1 is heated to its melting point by the same thermal press machine A, and the adjacent wire cores are fused together. b. A method in which the wire cores are sandwiched between the heat press machines from above and below, and the heat press machine or the cores are laterally moved by an appropriate length to fuse adjacent wire cores within the movement range. C1 A method of adhering the wire cores lined up horizontally at appropriate locations in the longitudinal direction at appropriate intervals using a solvent or liquid glue. Incidentally, B of the wire core 1 in FIG. 4 is a signal line whose outer periphery is coated with an insulator C, C is a grounding wire, D is a shielding tape, and 2 is a jacket.

[Problem to be solved by the invention]

Among the above-mentioned methods for manufacturing a sagging flat cable, the method of fusing adjacent wire cores by heat as in (a) and (b) above has the following disadvantages: 7A, especially when coaxial cables are fused together with a large number of cores In this case, the insulator may be made of a heat-resistant material such as Teflon, but in the case of foamed polyester + 7 ethylene, which is inexpensive and has excellent electrical properties, the heat during fusion may deform the insulator and cause the properties to deteriorate. It will change. B The PvC material used for the sheath contracts after it is heated during fusion until it returns to room temperature, so the pitch between the conductors and other dimensions may deviate from tolerance6. Alternatively, in the method of fusing adjacent wire cores with liquid glue, if the amount of solvent or liquid glue is large, the solvent or liquid glue may run in the longitudinal direction of the wire cores more than necessary due to capillary action between the adjacent wire cores. , the boundary between the non-fused area and the fused area becomes unclear. When this boundary becomes unclear, the following problems arise. a. When cutting the cable, it is not possible to measure the dimensions of the cut point. b: When a 4-way processed cable is wired inside an electronic device, the appearance becomes uneven and unsightly.

[Purpose of the invention]

An object of the present invention is to solve the problem of the method of fusing adjacent wire cores using a solvent or liquid glue as described in (1) above. Specifically, it prevents the running of solvent and liquid glue due to capillary action without damaging the jacket, ensures that the jacket is fused to a specified length, and the boundary between the unfused part and the fused part is clear. An object of the present invention is to provide a method for manufacturing a sagging flat cable.

[Means to solve the problem]

The method for manufacturing a sagging flat cable of the present invention includes the first
As shown in the figure, two or more wire cores 1 are arranged horizontally in a row, and the adjacent wire cores 1 are intermittently bonded at appropriate points in the longitudinal direction with a solvent.
In the method for manufacturing a sagging flat cable in which an adhesive part 3 and a non-adhesive part 4 are provided, a hole 5 for preventing water running is made at the boundary between the adhesive part 3 and the non-adhering part 4, and then the adjacent water running prevention hole 5 is made. This is characterized in that a solvent is supplied between the holes 5 to bond the water running prevention holes 5 of adjacent wire cores 1 together.

[Effect]

In the method for manufacturing a sagging flat cable of the present invention, holes 5 for preventing water running are formed at the boundary between the bonded portion 3 and the non-bonded portion 4 of adjacent wire cores 1, and then the holes 5 for preventing water running are formed between the adjacent holes 5 for preventing water running. Since the solvent is supplied to the holes 5, water running due to the capillarity of the solvent is prevented, and adjacent wire cores 1 can be accurately bonded to a desired length.

【Example】

The method for manufacturing the sagging flat cable of the present invention is as follows. A required number of wire cores 1 are intermittently fed out from a plurality of supply bobbins 7 shown in FIG. 1, and are aligned in a horizontal line through two guides 8 which are opposed to each other and separated by a predetermined distance. The jig 9 shown in FIG. 2 is lowered from above the wire core 1 that has been prepared, and a large number of heating bottles 10 of the jig 9 are pressed between adjacent wire cores 1 to form holes 5 for preventing water running. Open. In this case, the heating bottle 10 is inserted between the wire cores 1 for a few seconds, and then the jig 9 is raised to remove the heating bottle 10 from the water running prevention hole 5. Thereafter, a solvent is supplied between the water running prevention holes 5 of adjacent wire cores 1, and only the water running prevention holes 5 are bonded. In this case, the solvent may be applied with a nozzle with a tip shaped like a brush, or the necessary amount of solvent may be dropped from a thin nozzle approximately in the middle of the adjacent main run prevention holes 5, and the same eraser may be applied to the water run. A water run is made between the holes 5 for preventing water running, and only the wire core l between the two water running prevention holes 5 is bonded. Thereafter, the applied or dropped solvent is dried to complete the adhesion. The tool 9 is raised and lowered by an elevator (not shown). The distance 1tiiL between the heating bins 10 arranged in a row corresponds to the interval I2 (FIG. 1) between adjacent wire cores l, and
The width W of the two rows of heating bins 10 is the length 2 of the adhesive part 3 of the wire core I.
It's tailored to. For example, a sheathed heater or the like is used for each heating bottle 10. Although its diameter varies depending on the thickness of the adjacent wire core 1, it is preferably about 0.4 to 0.5 mm, for example. As for the structure of the wire core l used in the method for manufacturing the sag-shaped flat kheple of the present invention, various structures as shown in FIGS. 3a and 3b are used. In the cable shown in Figure 3a, a signal line B and a grounding line C are wired in parallel, and a jacket 2 is provided on the outside. A signal wire B and a ground wire C coated with are lined up side by side, their outer peripheries are wrapped with shield tape D, a jacket 2 is provided on the outside, and the four corners of the jacket 2 are cut. Incidentally, the wire core 1 shown in FIG. 4 has the same structure as the core wire 1 shown in FIG. 3 except that the four corners of the jacket 2 are not cut.

【Effect of the invention】

According to the method for manufacturing a sagging flant cable of the present invention, since the water running prevention holes 5 prevent water running due to the capillary action of the solvent, it is possible to accurately bond adjacent wire cores 1 to a desired length. can. Furthermore, the method for manufacturing the sagging flat cable of the present invention includes:
It is effective for intermittent welding of cables with coaxial cords arranged in a flat shape with many cores, especially when the insulator and sheath material are PvC.
Valid if .

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of the method for manufacturing a sagging flat cable of the present invention, Fig. 2 is an explanatory diagram showing an example of jigs and tools used in the manufacturing method, and Figs. 3 a and b are illustrations of the same manufacturing method. FIG. 4 is an end view showing an example of a sagging flat cable, and FIG. 5 is an explanatory view showing an example of a conventional method for manufacturing a sagging flat cable. It is. 1 is the wire core 3 is the adhesive part 4 is the non-adhesive part 5 is the hole 76 for preventing water running.

Claims (1)

[Claims] A sagging-like flat cable in which two or more wire cores 1 are lined up horizontally in a line, and the adjoining wire cores 1 are intermittently bonded at appropriate locations in the longitudinal direction with a solvent to provide bonded portions 3 and non-bonded portions 4. In the manufacturing method, after drilling a water running prevention hole 5 at the boundary between the bonded part 3 and the non-bonded part 4, a solvent is supplied between the adjacent water running prevention holes 5 to prevent water running of the adjacent wire cores 1. A method for manufacturing a sagging flat cable, characterized in that the prevention holes 5 are bonded together.