JPH0577818U - Curl wire - Google Patents

Abstract

(57) [Summary] [Structure] The central inclusion 3 is configured to be compressible, and the curl winding direction A of the covered electric wire 7 is the same as the twisted winding direction B of the covered core wire. . [Effect] Even if a stretching load is applied, the load is absorbed by the compression of the central inclusions 3, so that the curl fatigue and the curl restoring force are excellent, and the durability of the twisted and twisted core wire 4 is good. It is possible to provide a curled electric wire having excellent disconnection durability.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a curled electric wire in which a covered electric wire is curled in a spiral shape.

[0002]

[Prior Art]

 For a curled electric wire related to a covered electric wire in which a plurality of covered core wires, which are insulation-coated with conductors, are twisted together and a protective covering layer formed of polyvinyl chloride (PVC) or the like is formed on the outer periphery of the twisted and twisted core wire, Conventionally, the curl winding direction of the covered electric wire is opposite to the twisting direction of the covered core wire.

When the curled wire is stretched in the opposite direction, a force is applied in the direction in which the twisted and twisted core wire is loosened, so that it is possible to provide a curled wire that requires only a light drawing force, and it is possible to prevent curl fatigue and curl of the covered wire. This is because it is possible to provide curled electric wires that have reduced resilience and excellent durability.

[0004]

[Problems to be solved by the device]

 However, it has been found that the above-mentioned advantage is not exhibited in a curled electric wire in which a braided metal shield formed by braiding fine metal wires is formed on the outer circumference of a twisted and twisted core wire to shield electrostatic noise and electromagnetic noise.

In view of the above, according to the present invention, in a curl electric wire provided with such a braided metal shield, the curl winding direction and the twisting direction are set in the same direction based on an idea that is completely opposite to the conventional one, and a stretching force is set. It provides curled wire that is lightweight and has excellent durability.

[0006]

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

A plurality of coated core wires 2 insulatively coating the conductor wire 1 are twisted and arranged around the outer circumference of the central inclusion 3, and a thin metal wire is braided on the outer circumference of the twisted and twisted core wire 4. A shielded wire 5 is formed by coating, and a shielded wire 7 having a protective coating layer 6 formed on the outer periphery of the braided metal shield 5 is spirally curled, and the central inclusion 3 is made of a compressible elastic material. The present invention relates to a curled electric wire, wherein the curled winding direction A of the covered electric wire 7 is the same as the twisted winding direction B of the covered core wire.

[0008]

[Action]

 When the product is stretched, the internal twisted and twisted core wire 4 further receives a force in a twisting direction and is further tightly bound.

Since the central inclusions 3 of the twisted and twisted core wire 4 are made of a compressible elastic material, the central inclusions 3 are compressed and the force received by stretching is absorbed.

[0010]

【Example】

 In the present embodiment, the central inclusions 3 are constituted by bundling a plurality of cotton yarns 3 ′ so as to be compressible, the twisting direction B of the coated core wire 2 is right-handed, and the curl winding direction A of the coated wire 7 is also right-handed. Is formed.

Further, the illustrated embodiment will be described in detail.

The conductor 1 is a bundle of 30 annealed copper wires having an outer diameter of 0.08 mm, and the conductor 1 is covered with PVC to form a coated core wire 2 having an outer diameter of 0.9 mm. The coated core wire 2 is twisted around the outer periphery of the central inclusion 3, and the outer periphery of the twisted and twisted core wire 4 is pressed by a paper tape 8 and a braided metal shield 5 is coated on the outer periphery.

The braided metal shield 5 is made by braiding eight thin metal wires each having an outer diameter of 0.08 mm by 16 strokes with a pitch of 35 mm.

The outer periphery of the braided metal shield 5 is coated with PVC to form a protective coating layer 6, thereby forming a coated electric wire 7 having an overall outer diameter of 5 mm.

This coated electric wire 7 was curled in the same direction as the twisting direction B as described above, and this example was used as sample X, and was constructed in exactly the same manner as this example, but the twisting direction B The following is the experimental result of comparing the characteristics of the sample Y in which the curl winding direction A and the curl winding direction are opposite.

(1) Curl wire pulling force characteristics When the samples X and Y were placed on a horizontal surface and the load when the curl length was extended to 2 times or 3 times was examined, the sample Y was felt to be felt by hand. In contrast, the tensile force of Sample X according to this example was light.

(2) Curl Fatigue Property A curl length (self-weight length) when vertically held by holding one end of the curl electric wire is measured. Further, after carrying out 10,000 times the movement for expanding and contracting the curl length three times, the self-weight length was similarly measured, and the change rate (%) was obtained.

[0018]

[Equation 1]

[0019]

[Table 1]

From these results, it was confirmed that the sample C according to this example has good curl fatigue characteristics.

(3) Curl Restoring Force The curl length was placed on a horizontal surface, the curl length was extended 4 times and maintained for 24 hours, and the load was released and left for 1 hour. The rate of change in curl length was calculated.

[0022]

[Table 2]

From these results, it was confirmed that the curl restoring force of the sample X according to this example is also good.

[0024]

[Effect of the device]

 Since the present invention is configured as described above, even if a stretching load is applied, the load is absorbed by the compression of the central inclusions, which is excellent in curl fatigue and curl restoring force. It is possible to provide a curled electric wire having excellent durability and breaking durability.

[Submission date] April 14, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

The gist of the present invention will be described with reference to the accompanying drawings. A plurality of coated core wires 2 insulatively coating the conductor wire 1 are twisted and arranged around the outer circumference of the central inclusion 3, and a braided metal shield 5 in which a fine metal wire is braided around the outer circumference of the twisted and twisted core wire 4. A coated electric wire 7 which is formed by coating and has a protective coating layer 6 formed on the outer periphery of the braided metal shield 5 is spirally curled, and the central inclusions 3 are configured to be compressible. The present invention relates to a curled electric wire in which the curl winding direction A of 7 is the same as the winding direction B in which the coated core wires are twisted together.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Since the central inclusions 3 of the twisted and twisted core wire 4 are configured to be compressible, the central inclusions 3 are compressed and the force received by stretching is absorbed.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

As described above, the coated electric wire 7 was curled in the same direction as the twisting direction B, and the curl outer diameter was 16 mm and the curl length was 250 mm. The following is the experimental result of comparing the characteristics of the sample Y in which the twisting direction B and the curl winding direction A are opposite to each other.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

(1) Tensile Force Characteristics of Curled Electric Wire When the samples X and Y were placed on a horizontal surface and the tensile force required to stretch the curl length by 4 times was examined, it was found that the sample Y was 1350 g. On the other hand, the amount of the sample X according to this example was 850 g, which was greatly reduced.

[Procedure Amendment 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0019

[Correction method] Change

[Correction content]

[0019]

[Table 1]

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

From these results, it was confirmed that the sample X according to this example has less curl fatigue due to expansion and contraction.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

[0022]

[Table 2]

[Brief description of drawings]

FIG. 1 is an external view in which a part of the present embodiment is cut away.

FIG. 2 is a front view in which each part of this embodiment is sequentially cut away.

FIG. 3 is a sectional view of the present embodiment.

[Explanation of symbols]

 1 Conductor wire 2 Coated core wire 3 Center inclusion 4 Fused twisted core wire 5 Braided metal shield 6 Protective coating layer 7 Coated electric wire A Curl winding direction B Twisted winding direction

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[Procedure amendment]

[Submission date] April 14, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Item name to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (1)

[Scope of utility model registration request] 1. A plurality of coated core wires, which are insulation-coated conductors, are arranged around the outer circumference of a central inclusion in a twisted manner, and the outer circumference of the twisted and twisted core wire is covered with a braided metal shield in which fine metal wires are braided. A spirally curled coated electric wire formed with a protective coating layer on the outer periphery of the braided metal shield, wherein the central inclusion is composed of a compressible elastic material, and the coated electric wire is curled. A curled electric wire whose direction is the same as the twisted winding direction of the coated core wire.