JPH1031915A - Multi-core tube inserted cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture multi-core tube inserted cable, which is formed by inserting plural insulated wires having a small diameter conductor into a small diameter and relatively long tube, by using the tube, in which litz wires are inserted. SOLUTION: A tube 1, which is made of the relatively soft plastic such as polytetrafluoroethylene, polyethylene and soft vinyl chloride resin and which has a length of 5-150cm and which has an inner diameter of 1-5mm, is used. Litz wires 2 are inserted into this tube 1, and as the litz wire 2, a twisted wire formed by twisting plural number of insulated wires 3, which is formed by providing an insulating layer made of formal, polyester, polyurethane and polyimide or the like on a conductor at 0.1-0.5mm of conductor diameter, is used. With this structure, since rigidity of the wire 2 itself is sufficiently improved in relation to the insulated wire, and single wire 2 can be easily inserted into the tube 1. Consequently, lead wire or the like is eliminated, and since the inserting work can be performed by an automatic machine, multi-core tube inserted cable can be efficiently manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-core tube insertion conducting wire used for internal wiring of electronic equipment, for example.

[0002]

2. Description of the Related Art For the purpose of increasing the density and efficiency of internal wiring of electronic devices, a device in which a plurality of insulated wires are inserted through a tube made of plastic such as fluororesin is used. A wire in which a plurality of insulated wires are simply inserted through such a plastic tube is referred to as a multi-core tube insertion conducting wire.

In such a multi-core tube insertion conducting wire, the tube has a small diameter of 5 mm or less and a length of 5 mm.
In order to insert an insulated wire with a conductor diameter of 0.5 mm or less into a tube of 0 cm or more, the method of passing one insulated wire through a tube loses the resistance when the insulated wire contacts the inner wall of the tube in the tube. It bends and cannot be inserted.

For this reason, a highly rigid wire such as a steel wire is inserted into the tube in advance as a lead wire, a plurality of insulated wires are collectively connected to one end of the lead wire, and the lead wire is pulled out from the tube. Thereby, a method of inserting a plurality of insulated wires through a tube is adopted.

However, this method of using a lead wire requires time for preparing the lead wire and inserting the lead wire into a tube, and attaching and removing a plurality of insulated wires to and from the lead wire. It is possible but not an efficient method.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a multi-core tube insertion conducting wire in which a plurality of insulated wires each having a small diameter and a relatively long tube and having a small diameter conductor inserted therein can be efficiently manufactured. Is to do.

[0007]

This problem is solved by adopting a structure in which a litz wire or a multi-core parallel bonding wire is inserted into the tube as the structure of the multi-core tube insertion conducting wire.

[0008]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described in detail. FIG.
FIG. 1 shows an example of a multi-core tube insertion conducting wire of the present invention, and reference numeral 1 in the drawing denotes a tube. The tube 1 is made of a relatively flexible plastic such as polytetrafluoroethylene, polyethylene, or soft vinyl chloride resin.
It has a small diameter of 5 to 150 cm and an inner diameter of 1 to 5 mm.

A litz wire 2 is inserted through the tube 1. Here, the litz wire 2 has a conductor diameter of 0.1
A twisted wire obtained by twisting a plurality of insulated wires 3... Provided with an insulating layer made of formal, polyester, polyurethane, polyimide or the like on a conductor of about 0.5 mm, or a wire coated with a resin layer, or A self-fused insulated wire in which a fusion layer made of nylon, phenoxy resin, etc. is provided on the above insulated wire, or a stranded wire obtained by twisting a plurality of wires, or by heating the stranded wire to melt the fused layer and to insulate Fusing the wire,
An integrated product or a product obtained by coating this with a resin layer is used.

The conductor of each of the insulated strands of the litz wire 2 is set to 0.
If the length exceeds 5 mm, the rigidity increases, and the insulating wire alone can be inserted into the tube 1 without needing to use a litz wire. Further, the litz wire 2 is merely inserted into the tube 1 and is not fixed or fixed to the tube 1, leaving a gap and a loose state.

Further, the conductor of the insulated wire 3 of the litz wire 2 is not particularly limited, and is selected from copper, copper alloy, aluminum, aluminum alloy and the like as needed. , A chromium copper alloy, a high-strength metal such as a high-strength aluminum alloy is preferable because the rigidity of the litz wire 2 is increased.

In the multi-core tube insertion conducting wire having such a structure, the rigidity of the litz wire 2 itself is sufficiently higher than that of the insulated wire, so that the litz wire 2 can be easily inserted into the tube 1 by itself. can do. For this reason, an auxiliary means such as a lead wire becomes unnecessary, and the insertion operation can be performed by an automatic machine, so that a multi-core tube insertion conducting wire can be produced extremely efficiently.

In the present invention, a multi-core parallel bonding wire can be inserted into the tube 1 instead of the litz wire 2 described above. The multi-core parallel bonding wire is a tape-shaped wire in which two or more of the above-mentioned insulated wires are arranged in parallel, a batch coating layer is formed and bonded and integrated, or the self-fused insulated wire described above is used.
A tape-like material in which these wires are bonded and integrated by heating and arranging these fusion layers in parallel with each other, and two or more such multi-core parallel bonding wires are laminated and integrated. Say

[0014] Even if such a multi-core parallel bonding wire is used, its rigidity is similarly increased and its stiffness is increased, and it can be easily inserted into the tube 1 by itself. Also,
In the present invention, since litz wire and multi-core parallel bonding wire are produced in various specifications and standards, it is almost unnecessary to newly manufacture these in order to produce a multi-core tube insertion conducting wire, This is also advantageous.

Hereinafter, specific examples will be described. (Example 1) A conductor diameter of 0.15 mm was placed in a polytetrafluoroethylene tube having an inner diameter of 1.0 mm and a length of 1 m.
When a litz wire formed by twisting four urethane wires having a finished diameter of 0.2 mm was inserted, the wire could be easily inserted in a few seconds. (Example 2) A conductor diameter of 0.15 mm was placed in a polytetrafluoroethylene tube having an inner diameter of 1.0 mm and a length of 1 m.
When a multi-core parallel bonding wire in which four urethane wires having a finished diameter of 0.2 mm were arranged in parallel and bonded was inserted, it could be easily inserted in a few seconds.

Comparative Example 1 The urethane wires used in Example 1 were tried to be inserted one by one into the tube used in Example 1, but the urethane wires were bent in the middle of the tube and could not be inserted. . (Comparative Example 2) The tube used in Example 1 had a diameter of 0.3 mm in advance.
A 3 mm steel wire was passed as a lead wire, and the urethane wire used in Example 1 was connected to one end of the lead wire by 4 mm.
The four wires were inserted by connecting them together and then pulling out the lead wire from the tube, but the working time required was 3 to 5 times as compared with that of the first or second embodiment.

[0017]

As described above, the multi-core tube insertion and conduction wire of the present invention is a litz wire having a conductor diameter of 0.1 to 0.5 mm or a multi-core parallel wire in a small-diameter tube having an inner diameter of 1 to 5 mm. Since it is a product through which an adhesive wire is inserted, workability is improved in manufacturing compared to a product that inserts a single insulated wire into a tube one by one or a product that uses a lead wire.
Cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of a multi-core tube insertion conducting wire of the present invention.

[Explanation of symbols]

 1 tube 2 litz wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keiji Nakano 9-1 Futaba-cho, Numazu City, Shizuoka Prefecture Inside Fujikura Numazu Plant (72) Inventor Hideomi Hayashi 5-1-111 Nishitenma, Kita-ku, Osaka-shi, Osaka Fujikura Kansai Branch

Claims (1)

[Claims] 1. A multi-core tube insertion conducting wire formed by inserting a litz wire or a multi-core parallel bonding wire having a conductor diameter of 0.1 to 0.5 mm into a tube having an inner diameter of 1 to 5 mm.