US-12626839-B2 - Electrically insulated cable

Abstract

An electrically insulated cable comprising: a core electric wire; a tape member covering the core electric wire; and a covering layer covering the tape member, wherein: the core electric wire includes a plurality of insulated electric wires; the insulated electric wires each include a conductor and an insulating layer covering the conductor; the tape member is a film; and the tape member has a breaking elongation of 50% or less.

Inventors

• Yutaka Matsumura
• Shigeyuki Tanaka
• Taro Fujita
• Takumi OOSHIMA
• Jo Yagisawa

Assignees

• SUMITOMO ELECTRIC INDUSTRIES, LTD.

Dates

Publication Date

20260512

Application Date

20200803

Priority Date

20191030

Claims (9)

1. 1 . An electrically insulated cable comprising: a core electric wire; a tape member covering the core electric wire; and a covering layer covering the tape member; wherein: the core electric wire includes a plurality of insulated electric wires; the insulated electric wires each include a conductor and an insulating layer covering the conductor; the tape member is a film; and the tape member has a breaking elongation of 50% or less.
2. 2 . The electrically insulated cable according to claim 1 , wherein the tape member comprises at least one selected from the group consisting of a cellophane film, a microporous film, a uniaxially oriented film and a biaxially oriented film.
3. 3 . The electrically insulated cable according to claim 1 , wherein the tape member has a thickness of no less than 3 μm and no more than 200 μm.
4. 4 . The electrically insulated cable according to claim 1 , wherein the tape member has a softening point of more than 120° C.
5. 5 . The electrically insulated cable according to claim 1 , wherein the covering layer includes a first sheath layer covering the tape member and a second sheath layer covering the first sheath layer.
6. 6 . The electrically insulated cable according to claim 1 , wherein the plurality of insulated electric wires each have the same diameter, and the conductor in each of the plurality of insulated electric wires has a cross-sectional area of no less than 1.5 mm 2 and no more than 3.0 mm 2 .
7. 7 . The electrically insulated cable according to claim 1 , which is an electrically insulated cable to be mounted on a vehicle.
8. 8 . The electrically insulated cable according to claim 7 , which is an electrically insulated cable for an electric parking brake.
9. 9 . The electrically insulated cable according to claim 7 , which is an electrically insulated cable for an antilock brake system.

Description

TECHNICAL FIELD The present disclosure relates to an electrically insulated cable. The present application claims priority of Japanese Patent Application No. 2019-197608 filed on Oct. 30, 2019, the contents of which are hereby incorporated by reference in its entirety. BACKGROUND ART Electric parking brake (EPB) systems to be mounted on vehicles each use an electrically insulated cable (a cable for EPB) that electrically connects a caliper in a wheel house and an electronic control unit on the body side of a vehicle. CITATION LIST Patent Literature PTL 1: Japanese Patent Laying-Open No. 2015-156386PTL 2: Japanese Patent Laying-Open No. 2017-162644 SUMMARY OF INVENTION The electrically insulated cable according to the present disclosure is an electrically insulated cable comprising: a core electric wire;a tape member covering the core electric wire; anda covering layer covering the tape member;wherein:the core electric wire includes a plurality of insulated electric wires;the insulated electric wires each include a conductor and an insulating layer covering the conductor;the tape member is a film; andthe tape member has a breaking elongation of 50% or less. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a configuration of an embodiment of the electrically insulated cable of the present disclosure. FIG. 2 is a cross-sectional view showing a configuration of another embodiment of the electrically insulated cable of the present disclosure. FIG. 3 is a cross-sectional view showing a configuration of further another embodiment of the electrically insulated cable of the present disclosure. FIG. 4 is a schematic configuration diagram showing a manufacturing apparatus for manufacturing an electrically insulated cable according to one aspect of the present embodiment. DETAILED DESCRIPTION Problem to be Solved by the Present Disclosure Japanese Patent Laying-Open No. 2015-156386 (PTL 1) discloses an electrically insulated cable comprising: a core electric wire formed by twisting a plurality of core materials including a conductor and an insulating layer formed so as to cover the conductor; a first covering layer formed so as to cover the core electric wire; a second covering layer formed so as to cover the first covering layer; and a tape member arranged, between the core electric wire and the first covering layer, in a state of winding around the core electric wire; wherein: the second covering layer is formed of a flame-retardant polyurethane-based resin, and the cross-sectional area of each of the conductors is in the range of 0.18 to 3.0 mm2. Japanese Patent Laying-Open No. 2017-162644 (PTL 2) discloses a composite cable comprising: a first pair twisted wire formed by twisting a pair of first electric wires each having a first central conductor and a first insulator covering the first central conductor on the outer circumference thereof; a second pair twisted wire formed by twisting a pair of second electric wires each having a second central conductor and a second insulator covering the second central conductor on the outer circumference thereof; a pair of third electric wires that each have a third central conductor having a cross-sectional area larger than the first central conductor and the second central conductor and a third insulator covering the third central conductor on the outer circumference thereof, that each have an outer diameter larger than the first electric wire and the second electric wire, and that each are arranged between the first pair twisted wire and the second pair twisted wire in the outer circumference direction; and a tape member wound spirally around an assembly formed by twisting together the first pair twisted wire, the second twisted wire and the pair of the third electric wire; wherein: the twisting directions of both the pair twisted wires are the same as each other, the twisting directions of both the pair twisted wires are different from the twisting direction of the assembly, and the twisting direction of the assembly is different from the winding direction of the tape member. The tape member of each of PTL 1 and PTL 2 is formed of paper, a nonwoven fabric or the like. Therefore, when the covering layer and the tape member are removed by inserting a blade to expose the core material (insulated electric wire), the tape member is sometimes decomposed into pieces and scattered around. Under these circumstances, it has been required to improve workability in exposing an insulated electric wire. The present disclosure has been made in view of the above circumstances, and an object of the present invention is to provide an electrically insulated cable excellent in workability in exposing an insulated electric wire. Advantageous Effect of the Present Disclosure According to the present disclosure, it is possible to provide an electrically insulated cable excellent in workability in exposing an insulated electric wire. DESCRIPTION OF EMBODIMENTS First, implemen