JP2003068150A - Wire cable with heat contraction tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire cable with a heat contraction tube having good workability in attaching a terminal to each wire end of the wire cable and excellent in insulating capability at the terminal part. SOLUTION: This wire cable is composed by overlaying a sheath layer 6 on stranded wires. The wire is made by forming an insulation layer 2 on a conductor 1, and by overlaying a heat contraction tube 3 on the insulation layer. The heat contraction tube is formed of radiation cross-linked polyolefin, a surface lubricant is applied between the insulation layer and the heat contraction tube, the terminal is attached, thereafter the heat contraction tube is cut into a round shape and moved to the terminal part.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electric wire cable, and more particularly to an electric wire with a heat-shrinkable tube having a heat-shrinkable tube on an insulating layer of the wire.

[0002]

2. Description of the Related Art A conventional electric wire cable will be described in detail below with reference to the drawings.

3A and 3B show an example of a conventional electric wire cable, wherein FIG. 3A is a sectional view and FIG. 3B is a sectional view of an electric wire therein. Reference numeral 11 is a conductor, 12 is an insulator layer, 13 is an inclusion, 14 is a holding tape, and 15 is a sheath layer.

The electric wire cable includes a plurality of electric wires and an inclusion 1
3 and 3 are twisted together, are pressed together from the outside by a press-winding tape 14, and the sheath layer 15 is extruded and covered.

The electric wire has a conductor 11 at the center, and an insulator layer 12 is extruded from the conductor 11 to cover the conductor 11. The diameter of the conductor 11, the thickness and material of the insulator layer 12, the material and size of the inclusion 13, and the thickness and material of the sheath layer 15 are optimally determined according to the purpose of use of the electric wire and the environment of use. .

After the electric cable is laid, it is necessary to attach a terminal to each electric wire. The terminal work is the sheath layer 1
5 is stripped and stripped for a required length, and the holding winding tape 14 is removed to free each electric wire. And
The conductor layer 11 is exposed by stripping the insulation layer 12 of each wire end portion by a required length and stripping it off. The terminal is inserted into the exposed conductor 11, and the terminal is crimped with a tool to be fixed to the conductor 11.

There are a plurality of terminals of the electric wire, and the terminals are fixed to the respective terminal portions, but the portion fixed by crimping to the conductor 11, that is, the so-called terminal portion is exposed and there is a risk of electric shock. Moreover, it may be difficult to identify a specific terminal as the number of terminals increases. An insulating cover is provided to prevent this electric shock and identify the terminal.

The insulating cover must be inserted into the electric wire cable side before fixing the terminal to the conductor 11 at the end of the electric wire. Then, an insulating cover having a specific color is used so that the terminal (terminal) to be specified can be identified with a special color. After the terminal is crimped and fixed to the conductor 11, the terminal portion is covered with an insulating cover, and the work is completed.

[0009]

The conventional electric wire cable has the following problems.

When the terminal is attached to the end of the electric wire cable, it is necessary to previously insert an insulating cover on the terminal on the electric wire cable side, resulting in a decrease in work efficiency.

There are terminals with an insulating cover in various colors, but in this case, there is a problem that workability is poor because the insulating cover cannot be separated from the terminal portion.

Further, although the terminal is covered with the insulating cover, it does not completely cover the terminal portion, that is, the crimping portion of the terminal and the conductor portion of the electric wire, so that there is a problem of poor insulation.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to improve the work efficiency when attaching a terminal to each electric wire end of an electric wire cable and to have excellent insulation at the terminal portion. It is to provide an electric wire cable with a shrinkable tube.

[0014]

In order to achieve the above object, the electric wire cable with a heat-shrinkable tube of the present invention is an electric wire cable in which a sheath layer is covered from above twisted electric wires. An insulating layer was applied on the conductor, and a heat shrinkable tube was coated on the insulating layer.

The heat shrink tube was constructed of radiation crosslinked polyolefin.

A mold release agent was applied between the insulating layer and the heat shrinkable tube.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an embodiment of an electric wire cable with a heat-shrinkable tube of the present invention.
Is a cross-sectional view, and (b) is a cross-sectional view of an electric wire with a heat-shrinkable tube therein. 1 is a conductor, 2 is an insulator layer, 3 is a heat shrinkable tube, 4 is an inclusion, 5 is a holding tape, and 6 is a sheath layer.

The electric wire cable includes a plurality of electric wires and an inclusion 4
Together with this, the structure is such that they are twisted together, pressed together from the outside with a press-winding tape 5, and the sheath layer 6 is extruded and covered. When the number of electric wires is one, the sheath layer 6 is provided on the electric wires without inserting the inclusions 4.

The electric wire has a conductor 1 at the center, and an insulating layer 2 is extruded from the top of the conductor to cover it, and a heat-shrinkable tube 3 is overmolded on the conductor.

The diameter of the conductor 1, the thickness and material of the insulating layer 2, the material and size of the inclusion 4, and the thickness and material of the sheath layer 6 are optimal depending on the purpose of use of the electric cable and the operating environment. Is decided. And heat shrink tube 3
Uses a radiation-crosslinked polyolefin excellent in shrinkability and electrical insulation. In order to prevent adhesion with the insulating layer 2, it is necessary to apply a suitable release agent, such as silicone oil, between the insulating layer 2 and the heat shrinkable tube 3.

FIG. 2 shows an example of use of the electric wire cable with a heat-shrinkable tube of FIG. 1, where (a) is a front view before covering the terminal portion with the heat-shrinkable tube, and (b) is heat-shrinkable. It is a front view after covering a terminal part with a tube. 7 is a terminal.

In the terminal attaching work, the sheath layer 6 is stepped and peeled off for a required length, and the press winding tape 5 is removed to free each electric wire. Then, the conductor layer 1 is exposed by stripping off the insulating layer 2 and the heat shrinkable tube 3 of each wire end portion by a required length. The terminal is inserted into the exposed conductor 1, and the terminal is crimped with a tool to be fixed to the conductor 1. After that, the heat-shrinkable tube 3 provided on the surface of the electric wire is sliced and moved to the terminal portion, and heat is applied to shrink the tube.

Since the heat-shrinkable tube completely covers the terminal portion, the insulating property of the terminal portion is excellent. In addition, the work efficiency when attaching the terminal to each wire end of the wire cable is very good because there is no need to insert an insulating cover on the wire cable side.

When there is a terminal to be specified, the purpose can be achieved by setting the color of the heat-shrinkable tube to a specific color.

[0026]

According to the electric wire cable with a heat-shrinkable tube of the present invention, the heat-shrinkable tube is covered on the insulating layer of each electric wire, and after the terminal is attached, the heat-shrinkable tube is sliced and moved to the terminal portion. Therefore, when the terminal is attached to each electric wire end of the electric wire cable, the working efficiency is good, and the insulating property in the terminal portion is excellent.

[Brief description of drawings]

FIG. 1 shows an embodiment of an electric wire cable with a heat-shrinkable tube of the present invention, in which (a) is a sectional view,
(B) is sectional drawing of the electric wire with a heat shrinkable tube in it.

2A and 2B show examples of use of the electric wire cable with a heat-shrinkable tube in FIG. 1, in which FIG. 2A is a front view before the terminal portion is covered with the heat-shrinkable tube, and FIG. It is a front view after covering with a part.

FIG. 3 shows an example of a conventional electric wire cable, in which (a) is a sectional view and (b) is a sectional view of an electric wire therein.

[Explanation of symbols]

1 conductor 2 Insulator layer 3 heat shrink tube 4 inclusions 5 holding tape 6 sheath layer 7 terminals 11 conductors 12 Insulator layer 13 Inclusion 14 Holding tape 15 Sheath layer

Claims (3)

[Claims] Claim: What is claimed is: 1. An electric wire cable comprising a twisted electric wire and a sheath layer covering the electric wire, wherein the electric wire is provided with an insulating layer on the conductor, and a heat shrinkable tube is put on the insulating layer. An electric wire cable with a heat-shrinkable tube, characterized in that 2. The electric wire cable with a heat-shrinkable tube according to claim 1, wherein the heat-shrinkable tube is made of radiation-crosslinked polyolefin. 3. The electric wire cable with a heat shrink tube according to claim 1, wherein a release agent is applied between the insulating layer and the heat shrink tube.