JPH0348812Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flexible electric wire, and particularly to a flexible electric wire using a laminate tape made of plastic film laminated with metal foil as a conductor core.

[Conventional technology and its problems]

Extremely flexible electric wires are made by applying an insulating coating to a conductor core made by winding metal foil horizontally on a fiber thread, then twisting the insulated core wires together, and then applying an outer sheath on top of the conductor core. The so-called gold thread electric wire is known. As can be seen from its structure, this electric wire has extremely low productivity and high cost, so there has been a need for an alternative. In order to meet this requirement, Japanese Utility Model Publication No. 61-27059 proposes that ``a collection of two or more conductive materials consisting of a band-shaped core material made of a flexible synthetic resin film and a metal foil coating material bonded to at least one side of the band-shaped core material is made of a flexible synthetic resin film. "Electrical wires made of wires" are proposed.

However, when examining the electric wire described in this publication, a laminate tape of plastic film and metal foil is used as it is in the form of a band. For this reason,
When a conductor of a flexible electric wire is constructed in such a state, there is a problem that if the conductor is subjected to repeated vibration and bending for a long period of time, stress will accumulate at the edge of the tape, which may lead to wire breakage.

[Purpose of invention]

In view of the above-mentioned problems, the present invention uses a laminated tape of plastic and metal foil as a conductor core, and improves the vibration resistance and bending properties of flexible wires by preventing stress from concentrating on the edges of the laminated tape. The aim is to provide products that have improved.

[Means for achieving the purpose of the invention]

In order to achieve the above object, in the present invention, in the conventional electric wire consisting of a conductor core made of a plastic film laminated with a metal foil, a laminate tape with a metal foil laminated to the plastic film is attached with the metal surface facing outward. It is cylindrical to form a conductor core,
The structure is such that a plurality of these conductor cores are assembled and coated with insulation.

[Function] The flexible electric wire of the present invention constructed as described above has a cylindrical shape with the metal foil side of the laminated tape facing outward, so the stress from vibration and bending is dispersed over the entire tape area and is not applied to the edges. It does not concentrate, improves vibration resistance and flexibility, and also prevents the inner surface of the insulator from being scratched by the edge of the tape.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figures 1 and 2 show the flexible electric wire according to the present invention, and 1 is a tube made by forming a narrow laminate tape made by laminating copper foil M and nylon film P into a cylindrical shape with the copper foil side facing outward. A collective conductor is formed by collecting shaped conductor cores 2, and 3 is an insulating layer applied thereon.

In this embodiment, since the conductor core 2 is formed by using a cylindrical laminate tape, the stress caused by vibration and bending is dispersed over the entire area of the tape and does not concentrate in one part. Therefore, it has good vibration resistance and flexibility. Further, since the outer surface (edge) of the conductor core 2 is a soft copper foil surface, the inner surface (covered inner surface) of the insulating layer 3 will not be damaged.

Next, the manufacturing method of the above embodiment will be explained with reference to FIG.

First, a laminate tape made by pasting together a nylon film P and a copper foil M of the required width is made into a roll.
This wide laminated tape 10 is the feeding means 1.
1 and is cut by a slitter 12 into six narrow laminate tapes 13. This narrow laminate tape 13 is passed through a molding roller 14.
The edge of the tape is shaped as shown in FIG. 4, and then the tape is passed through a cylindrical die 15 to be formed into a cylindrical conductor core 2 with six strips.

The six cylindrical conductor cores 2 pass through a batten 17 with concentric passage holes, are assembled in a gathering die 18, and are then formed into an insulating coating 3 by an extrusion molding machine 19.
is applied to obtain the flexible electric wire of the present invention.

Although copper foil was used as the metal foil in the above example, conductive materials such as aluminum, silver,
Gold etc. can be used. Furthermore, the plastic film should preferably have low elongation, and in addition to nylon, polyester, polypropylene, tetrafluoroethylene, etc. can be used.

Furthermore, in the forming roller 14, the left and right forming curvatures are slightly different to prevent the edges of the laminate tape from colliding when forming into a cylindrical shape.

Further, a feeding means 11, a slitter 12, a molding roller 14, and a die 15 are provided in several stages, and the cylindrical conductor cores 2 fed out from these are collected on a batten 17, so that more than ten cylindrical conductor cores 2 are formed. It is also possible to obtain a flexible wire consisting of a conductor core 2.

〔effect〕

The flexible electric wire of the present invention as described above has good flexibility, is resistant to vibration and bending, has extremely good productivity, and can be provided to the market at low cost.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the flexible electric wire according to the present invention, Figure 2 is a perspective view of the flexible electric wire according to the present invention;
The drawings are an enlarged front view of the conductor core shown in FIG. 1, FIG. 3 is a manufacturing explanatory view of the embodiment, and FIG. 4 is a sectional view of the tape after molding shown in FIG. 3. 1... Collective conductor, 2... Cylindrical conductor core, 3... Insulating layer, M... Copper foil, P... Plastic (nylon) film.

Claims (1)

[Scope of utility model registration request] A laminated tape consisting of a plastic film with low elasticity and a metal foil pasted on at least one side, and a plurality of conductor cores formed into a cylinder with the metal foil on the outside, and an insulating coating applied around them. A flexible electric wire featuring: