JPH069379Y2 - Polyethylene insulated cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a polyethylene insulated cable.

[Prior Art] In recent years, an insulation-free peel-off collective pressure welding connection method using an IDC connector for the purpose of processing the cable end and reducing the number of connection steps has become widespread, and an insulation cable compatible with the IDC connector has been commercialized. This type of cable is generally formed by fusing a cable end in a flat shape.

FIG. 4 shows a conventional insulated cable corresponding to an IDC connector, in which 8 is a conductor, 9 is an insulator covered by each conductor 8, and each conductor 8 and the insulator 9 form a wire core. .
In the conventional fusion bonding process, polyvinyl chloride is used as the insulator 9, the ends of the wire cores that are the cable end portions are arranged in parallel, and the insulators 9 of the wire cores are fused by heat softening (reference numeral). 10)). Reference numeral 11 is a reinforcing material for the polyester film with a vinyl adhesive.

[Problems to be Solved by the Invention] By the way, the above-mentioned polyvinyl chloride insulator is not suitable for high frequencies because of its large dielectric constant, and polyethylene insulation having a low dielectric constant is used as an insulator for high frequency cables. The body tends to be used.

However, fusion between polyethylene insulators due to softening is difficult. Therefore, the conventional polyethylene insulator does not have the IDC connector non-insulator collective connection method, and the connection to the connector is easy. The connection method by soldering or crimping, which is inferior in quality, is generally adopted.

The present invention has been made in view of the above points, and it is an object of the present invention to enable fusion flat processing even in an insulated cable using a polyethylene insulator, and to adopt a non-insulator collective pressure welding connection method. To provide the cable.

[Means for Solving the Problems] The above object is to arrange a plurality of wire cores, each of which has a conductor coated with a polyethylene insulator, in parallel with each other. Then, a composite film obtained by laminating an ionomer resin layer on a reinforcing film in this parallel arrangement portion is provided so that the ionomer resin layer is on the wire core side, and the polyethylene insulator of the wire core is heat-sealed to the ionomer resin layer. And a flat array portion of wire cores is formed at the terminal portion of the cable.

[Function] The ionomer resin has an excellent heat fusion property with respect to polyethylene. Therefore, by using the composite film in which the ionomer resin is laminated on the reinforcing film, the flat array portion is formed on the cable terminal portion by arranging the ionomer resin layer on the ionomer resin layer in parallel with the core insulated with polyethylene and by heat-sealing. . As a result, even in the case of a polyethylene insulated cable, it is possible to perform the insulation-free peel-off collective pressure connection by the IDC connector.

Polyethylene insulators include general polyethylene, irradiated polyethylene, cross-linked polyethylene, flame-retardant polyethylene, etc.
All polyethylene insulator materials have a fusion property to the ionomer resin, and the present invention can be applied to these materials.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a sectional view showing an embodiment of the present invention, showing a terminal portion of a polyethylene insulated cable. In FIG. 1, 1 is a conductor, 2 is a polyethylene insulator, and the conductor 1 and the polyethylene insulator 2 form a cable core.

A composite film 3 has a two-layer structure of an ionomer resin layer 3a and a polyester film layer 3b, and the thickness of the film is set to 1 mm or less.

In the present embodiment, the cores are arranged in parallel at a predetermined pitch between the lines, and the polyethylene insulator 2 of each core is attached to the ionomer resin layer.
3a is heat-sealed. Here, the temperature for heat fusion is preferably 150 ° C. The polyester film layer 3b is for reinforcement and prevents the flat array portion from losing its shape at the time of heat fusion, and also prevents separation between the wire cores after heat fusion.

With such a configuration, the end portion of the polyethylene insulated cable has a flat shape, and the IDC connector can be used also in the polyethylene insulated cable.

2 and 3 show specific examples of the polyethylene insulated cable to which the above-mentioned embodiment is applied.

In the case of FIG. 2, since it is difficult to heat-soften and fuse polyethylene to each other in a polyethylene insulated cable, the cable itself is a woven flat cable, and the reference numeral 5 indicates the laid flat cable body. Reference numeral 4 denotes a cable terminal portion, and each wire core of the cable terminal portion is flattened by heat fusion using the film 3 with an ionomer resin layer shown in FIG.

In the case of FIG. 3, a polyethylene insulation cable is rounded, and the reference numeral 7 is a cable body, and the cable body 7 is formed by bundling a number of polyethylene insulation cores in a round shape. Reference numeral 6 denotes a cable terminal portion. In the cable terminal portion 6, the cable cores are arranged in parallel in a flat shape, and the cable cores are fused and flattened using the ionomer resin layer-coated film 3 of FIG. Is.

According to this embodiment, as shown in FIGS. 2 and 3, the cable end portions of the polyethylene insulated woven cable and the round cable can be made flat, so that the IDC connector can be used.

[Effects of the Invention] As described above, according to the present invention, even in an insulated cable using a polyethylene insulator, fusion flat processing can be performed, and an insulator-free peeling collective pressure welding connection system can be easily adopted. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIGS. 2 and 3 are plan views showing a concrete example of a polyethylene insulated cable to which the above embodiment is applied, and FIG. 4 is a vinyl chloride insulated cable. FIG. 7 is a cross-sectional view showing a conventional example of FIG. 1 ... Conductor, 2 ... Polyethylene insulator, 3 ... Composite film, 3a ... Ionomer resin layer, 3b ... Polyester film layer, 4, 6 ... Cable end part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-65779 (JP, A) JP-A-1-107422 (JP, A) Actually opened 58-52723 (JP, U) Actually opened 58- 120509 (JP, U) Actual opening 61-149278 (JP, U) Actual opening 61-149279 (JP, U) Actual opening 62-171652 (JP, U) Actual opening 63-18713 (JP, U) Actual Development Sho 63-117012 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A cable comprising a conductor and a plurality of wire cores each of which is coated with a polyethylene insulator, wherein end portions of the respective wire cores, which are cable end portions, are arranged in parallel and are reinforced in the parallel arrangement portion. A composite film obtained by laminating an ionomer resin layer on a film is provided so that the ionomer resin layer is on the wire core side, and the polyethylene insulator of the wire core is heat-sealed to the ionomer resin layer to form a terminal portion of the cable. A polyethylene insulated cable characterized in that a flat array portion of wire cores is formed.