JPH0622085B2 - Manufacturing method of shielded wire for insulation displacement connection - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a shielded wire for pressure contact connection, and more particularly to a method for manufacturing a shielded wire for pressure contact connection with improved end workability.

[Prior Art] Conventionally, as a shielded wire for pressure contact connection, one of conductive cores in which two conductors of an insulating core coated with an insulator are arranged in parallel and one side of which is coated with conductive plastic on the outer periphery of a ground conductor is used.
Books are arranged side by side, and one metal tape is vertically attached to one of the insulating cores so that both sides of the insulating tape come into contact with each other to form a shield layer, and plastic is extruded on the outer periphery of the shield layer. It is known to cover and provide a jacket.

However, in the above-mentioned conventional shielded wire for pressure contact connection, since the metal tapes of the shield layers between the insulating cores and between the insulating core and the conductive core are in a state of simply overlapping and in contact with each other, the shield wire for pressure contact connection is provided. When the terminal treatment for stripping off the jacket of the wire end portion is performed, there is a problem that the metal tapes are separated from each other to form a gap, the pitch between the cores is disturbed, and the pressure contact connector cannot be connected to the end portion.

To obtain the adhesion of the metal tapes between the insulating cores and between the insulating cores and the conductive cores, the punching rollers are used to form punching holes at predetermined intervals in the overlapping parts of the metal tapes. It has been proposed to integrate and integrate a plastic sheath via the. (JP-A-63-239712).

[Problems to be Solved by the Invention] However, in the method of forming a punching hole by using a roller, the punching hole is simply formed, and the adhesive force between the metal tapes is not sufficient. As a result of the study by the present inventor, it was found that it is difficult to prevent the metal tapes from being separated from each other.

It is an object of the present invention to provide a method for manufacturing a shielded wire for pressure contact connection, which is capable of improving the above-mentioned drawbacks of the prior art and improving the adhesiveness of metal tapes to each other and greatly improving the terminal processability. Is.

[Means for Solving the Problems] In the method for manufacturing a shielded wire for pressure contact connection according to the present invention, a shield layer overlaps metal tapes between insulating cores and between insulating cores and conductive cores, and a laser beam is applied to the overlapping portion. It is configured by forming a hole by the projection of and filling the hole with plastic.

The shield layer is formed using a metal tape such as a copper foil tape or an aluminum foil tape having a thickness of 18 μm or less and an elongation of 15% or more.

[Operation] In the present invention, since holes are provided in the overlapping portion of the metal tapes by projecting laser light, the metal tapes are welded and integrated at the peripheral portion of the holes by the heat generated by the laser light projections. This welding integration and the filling of the holes with plastic greatly improve the adhesion between the metal tapes, preventing the metal tapes from separating from each other even during terminal processing for peeling the jacket of the terminal part, and the pitch between cores is disturbed. It is possible to easily connect the press-connecting connector without using it, and the workability of the terminal can be greatly improved.

[Examples] FIG. 1 shows an example of a pressure-welding shielded wire obtained by the present invention, and FIG. 2 shows an embodiment of a method for producing a pressure-contacting shielded wire of the present invention. .

1 is a conductor, 2 is an insulator, 3 and 4 is an insulating core, 5 is a ground conductor, 6 is a conductive plastic, 7 is a conductive core, 8 is a copper foil tape, 9 is a shield layer, 10 is a hole, and 11 is a jacket. , 11 are shielded wires for pressure contact connection, 13, 14, 15,
16 is a feeder, 17 is a guide roll, 18 is a copper foil forming device, 19 is a laser hole punching device, 20 is a laser oscillator, 21 and 23 are laser projectors, 22 is YAG laser light, 24 is an extruder, and 25 is The take-up machine and 26 are take-up machines.

The conductor 1 is made of tin-plated annealed copper wire, and the outer periphery of the conductor 1 is extrusion-coated with an insulator 2 such as polyethylene to form insulating cores 3 and 4. The ground conductor 5 is made of tin-plated annealed copper wire, and a conductive plastic 6 such as conductive polyvinyl chloride is extrusion-coated on the outer periphery of the ground conductor 5 so as to expose a part of the surface of the ground conductor 5 to form a conductive core. 7 is provided. The shield layer 9 is made of a copper foil tape 8 having a thickness of 18 μm or less and an elongation of 15% or more, and is provided on the outer periphery of two insulating cores 3 and 4 arranged in parallel and a conductive core 7 provided on one side of the insulating core 4. The copper foil tape 8 is vertically covered so that both sides contact with each other on the insulating core 3, and the copper foil tape 8 is overlapped between the insulating cores 3 and 4 and between the insulating core 4 and the conductive core 7. A hole 10 is provided in the overlapping portion, and the hole 10 is filled with a plastic such as polyvinyl chloride so that the copper foil tapes 8 are closely adhered to each other. At this time, the filling of the plastic into the holes 10 is carried out at the same time as the outer circumference of the shield layer 9 is covered with the jacket 11. Furthermore,
The exposed ground conductor 5 is provided so as to come into contact with the copper foil tape 8 of the shield layer 9. The jacket 11 is made of plastic such as polyvinyl chloride, and is provided by extrusion coating on the outer periphery of the shield layer 9.

The two insulating cores 3, 4 and the conductive cores 7 on one side of the insulating cores 4 fed from the respective feeders 13, 14, 15 are arranged in parallel in the longitudinal direction by a guide roll 17, and a copper foil forming device 18 is provided. Be led to. In the copper foil forming device 18, one copper foil tape 8 fed from the feeder 16 and passed through the guide roll 17 is provided around the insulating cores 3 and 4 and the conductive core 7 arranged in parallel with each other. The copper foil tape 8 is vertically covered so that both sides are in contact with each other on the insulating core 3, and the copper foil tape 8 is overlapped between the insulating cores 3 and 4 and between the insulating core 4 and the conductive core 7. At this time,
The ground conductor 5 exposed from the conductive plastic 6 is coated so as to come into contact with the copper foil tape 8. Then, the insulating cores 3 and 4 and the conductive core 7 which are covered with the copper foil tape 8 and have overlapping portions are first passed through the guide roll 17 and oscillated from the laser oscillator 20 of the laser hole punching device 19 and the laser projector 21. Holes 10 are intermittently provided in the copper foil tape 8 in the overlapping portion between the insulating core 4 and the conductive core 7 and the overlapping portion between the insulating cores 3 and 4 by the YAG laser light 22 projected from the guide. Pass the roll 17. Next, a plastic such as polyvinyl chloride is extruded by an extruder 24 on the outer periphery of the shield layer 9 having the holes 10 to cover the jacket 11. At this time, the hole 1
0 is filled with the plastic of the jacket 11. The pressure welding connecting shield wire 12 covering the jacket 11 is taken up by the take-up machine 25 and taken up by the take-up machine 26.

In this way, the copper foil tapes are welded and integrated by intermittently providing holes in the overlapping portions of the copper foil tapes by projecting laser light, and by filling the holes with plastic, the copper foil tapes are joined together. The adhesive strength of the copper foil tape is further improved, and the copper foil tapes can be prevented from separating from each other even in the terminal processing work for peeling the jacket of the end portion of the shield wire for pressure contact connection, and the pressure contact connector can be easily connected without disturbing the pitch between cores. This makes it possible to significantly improve the terminal processability.

In the embodiment of the present invention, the manufacturing method in which the conductive core is arranged only on one side of the two insulating cores arranged in parallel has been described. However, the manufacturing method in which the conductive core is provided in the center and the insulating cores are arranged in parallel on both sides thereof. But good.

[Effects of the Invention] As described above, in the method for manufacturing a shielded wire for pressure contact connection of the present invention, the metal tapes are overlapped between the insulating cores and between the insulating cores and the conductive cores, and the overlapping portion of the laser light By forming a hole by projection and filling the hole with plastic, the adhesion of the metal tapes can be significantly improved, and the metal tapes can be prevented from separating during the terminal processing work of peeling the jacket of the end part of the shield wire for pressure contact connection. Since the pitch between the cores is not disturbed, the press-connecting connector can be easily connected, and the end workability can be greatly improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing an example of a pressure-contacting shielded wire obtained by the present invention, and FIG. 2 is a schematic explanatory view of a method for manufacturing the pressure-contacting shielded wire of the present invention. 1: Conductor, 2: Insulator 3, 4: Insulating core, 5: Ground conductor 6: Conductive plastic, 7: Conductive core 8: Copper foil tape, 9: Shield layer 10: Hole, 11: Jacket 12: Press connection Shield wire, 13, 14, 15, 16: Sending machine wire 17: Guide roll 18: Copper foil forming device, 19: Laser hole punching device 20: Laser oscillator, 21, 23: Laser projector 22: YAG laser light, 24: Extruder 25: Take-up machine, 26: Take-up machine

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Narusawa 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture Hitachi Cable Co., Ltd. Hidaka Plant (72) Inventor Koichi Nakajima 5 Hidaka-cho, Hitachi City, Ibaraki Prefecture 1-1-1 Hitachi Cable Co., Ltd. Hidaka Plant (72) Inventor Hideo Matsuo 5-1-1 Hidakacho, Hitachi City, Ibaraki Hitachi Cable Co., Ltd. Hidaka Plant (56) Reference JP-A-63 -239712 (JP, A) Actual development Sho 59-91614 (JP, U)

Claims (1)

[Claims] 1. Two insulating cores whose outer conductors are covered with an insulator and one conductive core whose outer conductors are covered with a conductive plastic are arranged in parallel in the longitudinal direction, and the insulating cores and the conductive cores are arranged. A shield layer of a metal tape is vertically attached to the outer periphery of the metal tape so that both sides of the metal tape come into contact with each other.
In a method for manufacturing a shield wire for pressure contact connection in which a plastic jacket is extruded and covered on the outer periphery of the shield layer, the metal tapes between the insulating cores and between the insulating cores and the conductive cores are overlapped with each other, and a laser is applied to the overlapped portion. A method of manufacturing a shield wire for pressure contact connection, which comprises projecting light to form a hole and filling the hole with the plastic.