Multicore cable

Patent metadata

Field	Value
Publication number	US-11049630-B2
Application number	US-202016843603-A
Country	US
Kind code	B2
Filing date	Apr 8, 2020
Priority date	Nov 20, 2019
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A multicore cable is composed of a bunched core composed of a plurality of electric wires laid together, each including a conductor, and an electrical insulating member provided over a periphery of the conductor, an abrasion suppressing layer configured as a taping member helically wrapped around a periphery of the bunched core, a shielding layer composed of a braided shield provided over an outer periphery of the abrasion suppressing layer, and a sheath provided over a periphery of the shielding layer. An opposite surface of the taping member constituting the abrasion suppressing layer to the bunched core and an opposite surface of the taping member constituting the abrasion suppressing layer to the shielding layer are composed of a fluoropolymer resin. The taping member constituting the abrasion suppressing layer is non-adhesively lap wound in such a manner as to partially overlap itself in a width direction thereof.

First claim

What is claimed is:

1. A multicore cable, comprising:
a bunched core including a plurality of electric wires laid together, each including a conductor, and an electrical insulating member provided over a periphery of the conductor;
an abrasion suppressing layer configured as a taping member helically wrapped around a periphery of the bunched core, the abrasion suppressing layer directly contacting with the electrical insulating member, the abrasion suppressing layer passing into valley portions between the plurality of electric wires;
a shielding layer including a plurality of layers of braided shields provided over an outer periphery of the abrasion suppressing layer;
a sheath provided over a periphery of the shielding layer; and
an air layer formed between the shielding layer and the abrasion suppressing layer passing into the valley portions,
wherein an opposite surface of the taping member of the abrasion suppressing layer to the bunched core and an opposite surface of the taping member of the abrasion suppressing layer to the shielding layer include a fluoropolymer resin, with the taping member of the abrasion suppressing layer being non-adhesively lap wound in such a manner as to partially overlap itself in a width direction of the taping member, and
wherein the plurality of layers of the braided shields are laminated on top of each other in radial directions of the multicore cable, with a braiding an of an innermost one of the plurality of layers of the braided shields, which is provided in an innermost side of the shielding layer in the radial directions of the multicore cable being smaller than braiding angles of outer ones of the plurality of layers of the braided shields, which are provided in an outer side of the shielding layer relative to said innermost one of the plurality of layers of the braided shields in the radial directions of the multicore cable.

2. The multicore cable according to claim 1 , wherein a wrapping direction of the taping member of the abrasion suppressing layer is the same as a lay direction of the bunched core.

3. The multicore cable according to claim 1 , wherein a coefficient of a friction on the opposite surface of the taping member of the abrasion suppressing layer to the bunched core and a coefficient of the friction on the opposite surface of the taping member of the abrasion suppressing layer to the shielding layer are lower than coefficients of the friction on surfaces of the electrical insulating members of the plurality of electric wires constituting the bunched core.

4. The multicore cable according to claim 1 , wherein at least one of the plurality of electric wires, constituting the bunched core, is configured in such a manner that the conductor thereof is configured to be moved independently of the electrical insulating member thereof.

5. The multicore cable according to claim 1 , wherein the braided shields include metal wires braided together therein having a tensile strength of not lower than 340 MPa and an elongation of not lower than 5%.

6. The multicore cable according to claim 5 , wherein the metal wires in the shielding layer include a tin-plated copper alloy.

7. The multicore cable according to claim 5 , wherein the metal wires in the shielding layer are coated with a lubricant agent thereon.

8. The multicore cable according to claim 1 , wherein at least one of the plurality of electric wires constituting the bunched core comprises a conductor cross-sectional area of the conductor thereof of not smaller than 0.75 mm 2 .

9. The multicore cable according to claim 1 , wherein the conductor of at least one of the plurality of electric wires constituting the bunched core includes a composite stranded wire produced by using a plurality of child stranded wires each including a plurality of metal wires stranded together, and further stranding the plurality of child stranded wires together.

10. The multicore cable according to claim 1 , wherein the abrasion suppressing layer contacts each of the plurality of electric wires.

11. The multicore cable according to claim 1 , wherein the abrasion suppressing layer abuts the electrical insulating member of each of the plurality of electric wires.

12. The multicore cable according to claim 1 , wherein the abrasion suppressing layer contacts a part of the shielding layer.

13. The multicore cable according to claim 1 , wherein the abrasion suppressing layer abuts a part of an inner surface of the shielding layer.

14. The multicore cable according to claim 1 , wherein, in a circumferential direction of the air layer, the abrasion suppressing layer spaces apart a first portion of the air layer from a second portion of the air layer.

15. The multicore cable according to claim 1 , wherein, in a circumferential direction of the air layer, the air layer includes a plurality of layers each confined between the abrasion suppressing layer and the shielding layer.

16. A multicore cable, comprising:
a bunched core including a plurality of electric wires laid together, each including a conductor, and an electrical insulating member provided over a periphery of the conductor;
an abrasion suppressing layer configured as taping member helically wrapped around a periphery of the bunched core, the abrasion suppressing layer directly contacting with the electrical insulating member, the abrasion suppressing layer passing into valley portions between the plurality of electric wires;
a shielding layer provided over an outer periphery of the abrasion suppressing layer;
a sheath provided over a periphery of the shielding layer; and
an air layer formed between the shielding layer and the abrasion suppressing layer passing into the valley portions,
wherein an opposite surface of the taping member of the abrasion suppressing layer to the bunched core and an opposite surface of the taping member of the abrasion suppressing layer to the shielding layer include a fluoropolymer resin, with the taping member of the abrasion suppressing layer being non-adhesively lap wound in such a manner as to partially overlap itself in a width direction of the taping member,
wherein the shielding layer includes:
an outer braided shield; and
an inner braided shield disposed between the outer braided shield and the abrasion suppressing layer, and

wherein a braiding angle of the inner braided shield is different from a braiding angle of the outer braided shield.

17. The multicore cable according to claim 16 , wherein the air layer abuts a first portion of a circumferential surface of the inner braided shield.

18. The multicore cable according to claim 17 , wherein the abrasion suppressing layer abuts a second portion of the circumferential surface of the inner braided shield.

Assignees

• Hitachi Metals Ltd

Inventors

• Huang Detian
• Tsukamoto Yoshinori
• Kobayashi Masanori
• Moriyama Masashi

Classifications

• H01B13/14 Primary

  by extrusion {(extrusion in general B29C48/00)} · CPC title

• H01B9/024 Primary

  composed of braided metal wire · CPC title

• H01B7/0275

  comprising one or more extruded layers of insulation · CPC title

• H01B13/2606

  by braiding · CPC title

• H01B7/187

  Sheaths comprising extruded non-metallic layers · CPC title