JP2021093349A - Multicore cable - Google Patents

Multicore cable Download PDF

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JP2021093349A
JP2021093349A JP2020109899A JP2020109899A JP2021093349A JP 2021093349 A JP2021093349 A JP 2021093349A JP 2020109899 A JP2020109899 A JP 2020109899A JP 2020109899 A JP2020109899 A JP 2020109899A JP 2021093349 A JP2021093349 A JP 2021093349A
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conductor
wire
signal line
core cable
twisted
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JP7207371B2 (en
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拓実 大嶋
Takumi Oshima
拓実 大嶋
石川　雅之
Masayuki Ishikawa
石川　　雅之
丈 八木澤
Jo Yagisawa
丈 八木澤
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Sumitomo Electric Industries Ltd
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Abstract

To provide a multicore cable which is excellent in bending resistance.SOLUTION: A multicore cable includes a plurality of power lines and an outer peripheral film covering the plurality of power lines. The power line is obtained by twisting one first conductor arranged in the center and a plurality of second conductors arranged on the outer periphery of the first conductor. The first conductor is obtained by twisting 10 or more and 100 or less first element wires, the second conductor is obtained by twisting 10 or more and 100 or less second element wires, a twisting direction of the first element wire in the first conductor, a twisting direction of the second element wire in the second conductor and a twisting direction of the first conductor and the second conductor in the power line are the same, and a twisting pitch of the first element wire and a twisting pitch of the second element wire are 8 mm or more and 22 mm or less.SELECTED DRAWING: Figure 1

Description

本開示は、多芯ケーブルに関する。 The present disclosure relates to a multi-core cable.

特許文献１には２本の被覆電線と、２本の被覆電線を覆う外被と、を有する車両用の多芯ケーブルが開示されている。 Patent Document 1 discloses a multi-core cable for a vehicle having two coated electric wires and a jacket covering the two coated electric wires.

特開２０１８−３２５１５号公報JP-A-2018-32515

本開示の一観点によれば、複数の電力線と、複数の前記電力線を覆う外周被膜とを備え、
前記電力線は、中心に配置された１本の第１導体と、前記第１導体の外周に配置された複数の第２導体とが撚り合わされており、
前記第１導体は、１０本以上１００本以下の第１素線が撚り合わされ、
前記第２導体は、１０本以上１００本以下の第２素線が撚り合わされ、
前記第１導体における前記第１素線の撚り方向と、前記第２導体における前記第２素線の撚り方向と、前記電力線における前記第１導体と前記第２導体との撚り方向と、が同一であり、
前記第１素線の撚りピッチ、および前記第２素線の撚りピッチは、８ｍｍ以上２２ｍｍ以下である多芯ケーブルを提供する。 According to one aspect of the present disclosure, a plurality of power lines and an outer peripheral coating covering the plurality of power lines are provided.
In the power line, one first conductor arranged at the center and a plurality of second conductors arranged on the outer periphery of the first conductor are twisted together.
In the first conductor, 10 or more and 100 or less first strands are twisted together.
In the second conductor, 10 or more and 100 or less second wires are twisted together.
The twisting direction of the first wire in the first conductor, the twisting direction of the second wire in the second conductor, and the twisting direction of the first conductor and the second conductor in the power line are the same. And
Provided is a multi-core cable in which the twist pitch of the first wire and the twist pitch of the second wire are 8 mm or more and 22 mm or less.

図１は、本開示の一態様に係る多芯ケーブルの長手方向と垂直な断面図である。FIG. 1 is a cross-sectional view perpendicular to the longitudinal direction of the multi-core cable according to one aspect of the present disclosure. 図２は、本開示の一態様に係る多芯ケーブルの長手方向と垂直な断面図の他の構成例である。FIG. 2 is another configuration example of a cross-sectional view perpendicular to the longitudinal direction of the multi-core cable according to one aspect of the present disclosure. 図３は、本開示の一態様に係る多芯ケーブルの長手方向と垂直な断面図の他の構成例である。FIG. 3 is another configuration example of a cross-sectional view perpendicular to the longitudinal direction of the multi-core cable according to one aspect of the present disclosure. 図４は、本開示の一態様に係る多芯ケーブルが有する電力線の導体部分の側面図である。FIG. 4 is a side view of a conductor portion of a power line included in the multi-core cable according to one aspect of the present disclosure. 図５は、実験例における耐屈曲性試験の方法を模式的に示す図である。FIG. 5 is a diagram schematically showing a method of bending resistance test in an experimental example.

［本開示が解決しようとする課題］
車輪は、車体に対して変位可能に支持されており、車両の使用時等に、車輪の位置が車体に対して変位するため、車体に搭載された制御装置と、車輪の周囲に設けられた電動パーキングブレーキ等との間を接続する多芯ケーブルは繰り返し曲げられる場合がある。このため、多芯ケーブルについて耐久性を高める観点から、高い耐屈曲性が求められていた。 [Issues to be solved by this disclosure]
The wheels are supported so as to be displaceable with respect to the vehicle body, and the position of the wheels is displaced with respect to the vehicle body when the vehicle is used. The multi-core cable connecting to the electric parking brake or the like may be repeatedly bent. Therefore, from the viewpoint of increasing the durability of the multi-core cable, high bending resistance has been required.

本開示の目的は、耐屈曲性に優れた多芯ケーブルを提供することである。 An object of the present disclosure is to provide a multi-core cable having excellent bending resistance.

［本開示の効果］
本開示によれば、耐屈曲性に優れた多芯ケーブルを提供できる。 [Effect of the present disclosure]
According to the present disclosure, it is possible to provide a multi-core cable having excellent bending resistance.

実施するための形態について、以下に説明する。 The embodiment for carrying out will be described below.

［本開示の実施形態の説明］
最初に本開示の実施態様を列記して説明する。以下の説明では、同一または対応する要素には同一の符号を付し、それらについて同じ説明は繰り返さない。 [Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described. In the following description, the same or corresponding elements are designated by the same reference numerals, and the same description is not repeated for them.

（１）本開示の一態様に係る多芯ケーブルは、複数の電力線と、複数の前記電力線を覆う外周被膜とを備え、
前記電力線は、中心に配置された１本の第１導体と、前記第１導体の外周に配置された複数の第２導体とが撚り合わされており、
前記第１導体は、１０本以上１００本以下の第１素線が撚り合わされ、
前記第２導体は、１０本以上１００本以下の第２素線が撚り合わされ、
前記第１導体における前記第１素線の撚り方向と、前記第２導体における前記第２素線の撚り方向と、前記電力線における前記第１導体と前記第２導体との撚り方向と、が同一であり、
前記第１素線の撚りピッチ、および前記第２素線の撚りピッチは、８ｍｍ以上２２ｍｍ以下である。 (1) The multi-core cable according to one aspect of the present disclosure includes a plurality of power lines and an outer peripheral coating covering the plurality of the power lines.
In the power line, one first conductor arranged at the center and a plurality of second conductors arranged on the outer periphery of the first conductor are twisted together.
In the first conductor, 10 or more and 100 or less first strands are twisted together.
In the second conductor, 10 or more and 100 or less second wires are twisted together.
The twisting direction of the first wire in the first conductor, the twisting direction of the second wire in the second conductor, and the twisting direction of the first conductor and the second conductor in the power line are the same. And
The twist pitch of the first wire and the twist pitch of the second wire are 8 mm or more and 22 mm or less.

本開示の一態様に係る多芯ケーブルは、第１導体における第１素線の撚り方向と、第２導体における第２素線の撚り方向とを同一とすることで、第１導体と、第２導体とが接する箇所において、第１素線の向きと第２素線の向きとを揃えることができる。このため、電力線を含む多芯ケーブルを屈曲した際に、電力線に含まれる素線間の擦れを抑制し、さらには素線に傷が生じることを抑制できる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、第１素線や、第２素線が切れることを抑制し、電力線の耐屈曲性を高められる。 The multi-core cable according to one aspect of the present disclosure has the same twist direction of the first wire in the first conductor and the twist direction of the second wire in the second conductor, so that the first conductor and the first conductor can be twisted. The direction of the first wire and the direction of the second wire can be aligned at the position where the two conductors are in contact with each other. Therefore, when the multi-core cable including the power line is bent, rubbing between the wires included in the power line can be suppressed, and further, scratches on the wires can be suppressed. Therefore, even when the multi-core cable is repeatedly bent, it is possible to prevent the first wire and the second wire from being cut and improve the bending resistance of the power line.

第１導体における第１素線の撚り方向と、第２導体における第２素線の撚り方向とを同一とすることで、第１導体と、第２導体とを製造する際に撚り方向を切り替える必要が無くなり、生産性を高めることもできる。 By making the twisting direction of the first wire in the first conductor and the twisting direction of the second wire in the second conductor the same, the twisting direction is switched when the first conductor and the second conductor are manufactured. It eliminates the need and can increase productivity.

さらに、第１導体における第１素線の撚り方向と、第２導体における第２素線の撚り方向と、電力線における第１導体と第２導体との撚り方向とを同一とすることで、特に素線間の擦れを抑制し、素線に傷が生じることを抑制できる。このため、電力線の耐屈曲性を特に高められる。 Further, by making the twisting direction of the first wire in the first conductor, the twisting direction of the second wire in the second conductor, and the twisting direction of the first conductor and the second conductor in the power wire the same, in particular, It is possible to suppress rubbing between the wires and prevent scratches on the wires. Therefore, the bending resistance of the power line can be particularly improved.

本開示の一態様に係る多芯ケーブルは電力線以外に、接続する機器や印加する電圧等に応じて信号線や、電線等の各種被覆電線を含むこともできる。ただし、多芯ケーブルが含む被覆電線のうち、通常は電力線が最も太く、負荷が加わり易いため、電力線は、多芯ケーブルを繰り返し屈曲させた場合に切断され易い。このため、電力線の耐屈曲性を高めることで、多芯ケーブル全体の耐屈曲性を高めることができる。 The multi-core cable according to one aspect of the present disclosure may include, in addition to the power line, a signal line and various coated electric wires such as electric wires depending on the equipment to be connected and the applied voltage. However, among the coated electric wires included in the multi-core cable, the power line is usually the thickest and the load is easily applied, so that the power line is easily cut when the multi-core cable is repeatedly bent. Therefore, by increasing the bending resistance of the power line, the bending resistance of the entire multi-core cable can be improved.

第１素線の撚りピッチと、第２素線の撚りピッチを８ｍｍ以上とすることで、第１導体、および第２導体の生産性を高めることができる。第１素線の撚りピッチと、第２素線の撚りピッチとを２２ｍｍ以下とすることで、第１導体、および第２導体の長手方向の単位長さ辺りの素線の充填密度を高くし、第１導体、第２導体の強度を高めることができる。このため、第１素線の撚りピッチと、第２素線の撚りピッチとを２２ｍｍ以下とすることで、電力線や、電力線を含む多芯ケーブルの耐屈曲性をさらに高めることができる。 By setting the twist pitch of the first wire and the twist pitch of the second wire to 8 mm or more, the productivity of the first conductor and the second conductor can be increased. By setting the twist pitch of the first wire and the twist pitch of the second wire to 22 mm or less, the packing density of the wires around the unit length in the longitudinal direction of the first conductor and the second conductor is increased. , The strength of the first conductor and the second conductor can be increased. Therefore, by setting the twist pitch of the first wire and the twist pitch of the second wire to 22 mm or less, the bending resistance of the power line and the multi-core cable including the power line can be further improved.

（２）前記第１素線の撚りピッチが、前記第２素線の撚りピッチよりも短くてもよい。 (2) The twist pitch of the first wire may be shorter than the twist pitch of the second wire.

電力線に含まれる第１導体、および第２導体のうち、中心に配置した第１導体は長手方向に沿って引っ張られ易い。このため、第２導体に含まれる第２素線よりも、第１導体に含まれる第１素線の撚りピッチを短くして、第１導体の強度を十分に高めることで、電力線や、電力線を含む多芯ケーブルの耐屈曲性を特に高められる。 Of the first conductor and the second conductor included in the power line, the first conductor arranged at the center is likely to be pulled along the longitudinal direction. Therefore, the twist pitch of the first wire contained in the first conductor is shorter than that of the second wire contained in the second conductor, and the strength of the first conductor is sufficiently increased to sufficiently increase the strength of the power line and the power line. The bending resistance of multi-core cables including

（３）前記第１素線の撚りピッチ、および前記第２素線の撚りピッチは、１０ｍｍ以上１４ｍｍ以下であってもよい。 (3) The twist pitch of the first wire and the twist pitch of the second wire may be 10 mm or more and 14 mm or less.

第１素線の撚りピッチと、第２素線の撚りピッチを１０ｍｍ以上とすることで、第１導体、および第２導体の生産性を特に高めることができる。第１素線の撚りピッチと、第２素線の撚りピッチとを１４ｍｍ以下とすることで、第１導体、第２導体の強度を特に高め、電力線や、電力線を含む多芯ケーブルの耐屈曲性を特に高めることができる。 By setting the twist pitch of the first wire and the twist pitch of the second wire to 10 mm or more, the productivity of the first conductor and the second conductor can be particularly increased. By setting the twist pitch of the first wire and the twist pitch of the second wire to 14 mm or less, the strength of the first conductor and the second conductor is particularly increased, and the power line and the multi-core cable including the power line are resistant to bending. The sex can be especially enhanced.

（４）前記第２素線の撚りピッチは、前記第１素線の撚りピッチの、１．１倍以上１．４倍以下であってもよい。 (4) The twist pitch of the second wire may be 1.1 times or more and 1.4 times or less the twist pitch of the first wire.

電力線に含まれる第１導体、および第２導体のうち、中心に配置した第１導体は長手方向に沿って引っ張られ易いため、第１導体の強度を高めることが好ましい。ただし、第２導体は、第１導体と比較して長手方向に引っ張られにくいため、第２素線の撚りピッチを、第１素線の撚りピッチの１．１倍以上とすることで、電力線の耐屈曲性に影響を与えず、生産性を高めることができる。第２素線の撚りピッチを、第１素線の撚りピッチの１．４倍以下とすることで、第２導体の強度を十分に高くし、電力線や電力線を含む多芯ケーブルの耐屈曲性を高めることができる。 Of the first conductor and the second conductor included in the power line, the first conductor arranged at the center is easily pulled along the longitudinal direction, and therefore it is preferable to increase the strength of the first conductor. However, since the second conductor is less likely to be pulled in the longitudinal direction than the first conductor, the twist pitch of the second conductor is set to 1.1 times or more the twist pitch of the first conductor to make the power line. It does not affect the bending resistance of the product and can increase the productivity. By setting the twist pitch of the second wire to 1.4 times or less the twist pitch of the first wire, the strength of the second conductor is sufficiently increased, and the bending resistance of the multi-core cable including the power line and the power line is increased. Can be enhanced.

（５）複数の前記電力線は撚り合わされており、
複数の前記電力線の撚り方向が、前記第１導体における前記第１素線の撚り方向と、前記第２導体における前記第２素線の撚り方向と、前記電力線における前記第１導体と前記第２導体との撚り方向と、同一であってもよい。 (5) The plurality of power lines are twisted together.
The twisting directions of the plurality of power lines are the twisting direction of the first wire in the first conductor, the twisting direction of the second wire in the second conductor, and the first conductor and the second wire in the power line. It may be the same as the twisting direction with the conductor.

複数の電力線の撚り方向を、第１導体における第１素線の撚り方向、第２導体における第２素線の撚り方向、電力線における第１導体と第２導体との撚り方向と同一とすることで、多芯ケーブルを屈曲した際に、撚り合わせた電力線に含まれる個々の電力線の長手方向の移動を円滑にできる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、電力線に局所的に力が加わることを抑制し、電力線や、電力線を含む多芯ケーブルの耐屈曲性を特に高められる。 The twisting direction of the plurality of power wires shall be the same as the twisting direction of the first wire in the first conductor, the twisting direction of the second wire in the second conductor, and the twisting direction of the first conductor and the second conductor in the power wire. Therefore, when the multi-core cable is bent, the movement of the individual power lines included in the twisted power lines in the longitudinal direction can be smoothly performed. Therefore, even when the multi-core cable is repeatedly bent, it is possible to suppress local force from being applied to the power line and particularly improve the bending resistance of the power line and the multi-core cable including the power line.

（６）前記電力線よりも断面積の小さい２本の信号線を撚り合せた対撚信号線をさらに有し、
前記信号線は、複数の第３導体が撚り合わされ、
前記信号線における前記第３導体の撚り方向と、前記対撚信号線における前記信号線の撚り方向とが同一であってもよい。 (6) Further having a pair twisted signal line obtained by twisting two signal lines having a cross-sectional area smaller than that of the power line.
A plurality of third conductors are twisted together in the signal line.
The twisting direction of the third conductor in the signal line and the twisting direction of the signal line in the paired signal line may be the same.

信号線における第３導体の撚り方向と、対撚信号線における信号線の撚り方向とを同一とすることで、多芯ケーブルを屈曲した際に、対撚信号線に含まれる個々の信号線の長手方向の移動を円滑にできる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、信号線に局所的に力が加わることを抑制し、信号線や、信号線を含む多芯ケーブルの耐屈曲性を特に高められる。 By making the twist direction of the third conductor in the signal line the same as the twist direction of the signal line in the anti-twisted signal line, when the multi-core cable is bent, the individual signal lines included in the anti-twist signal line can be used. Smooth movement in the longitudinal direction. Therefore, even when the multi-core cable is repeatedly bent, it is possible to suppress the local force applied to the signal line and particularly improve the bending resistance of the signal line and the multi-core cable including the signal line.

（７）前記電力線よりも断面積の小さい２本の信号線を撚り合わた対撚信号線をさらに有し、
前記信号線は、複数の第３導体が撚り合わされ、
前記信号線における前記第３導体の撚り方向と、前記対撚信号線における前記信号線の撚り方向とが同一であり、
前記対撚信号線と、複数の前記電力線とが撚り合わされており、
前記対撚信号線と複数の前記電力線との撚り方向と、前記対撚信号線における前記信号線の撚り方向とが同一であってもよい。 (7) Further having a pair twisted signal line obtained by twisting two signal lines having a cross-sectional area smaller than that of the power line.
A plurality of third conductors are twisted together in the signal line.
The twisting direction of the third conductor in the signal line and the twisting direction of the signal line in the paired signal line are the same.
The anti-twisted signal line and the plurality of the power lines are twisted together.
The twisting direction of the paired signal line and the plurality of power lines may be the same as the twisting direction of the signal line in the paired signal line.

信号線における第３導体の撚り方向と、対撚信号線における信号線の撚り方向とを同一とすることで、多芯ケーブルを屈曲した際に、対撚信号線に含まれる個々の信号線の長手方向の移動を円滑にできる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、信号線に局所的に力が加わることを抑制し、信号線や、信号線を含む多芯ケーブルの耐屈曲性を特に高められる。
また、対撚信号線と複数の電力線との撚り方向と、対撚信号線における信号線の撚り方向とを同一とすることで、多芯ケーブルを屈曲した際に、電力線や、対撚信号線の長手方向の移動を円滑にできる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、電力線や、信号線に局所的に力が加わることを抑制し、電力線や、信号線、電力線や信号線を含む多芯ケーブルの耐屈曲性を特に高められる。 By making the twist direction of the third conductor in the signal line the same as the twist direction of the signal line in the anti-twisted signal line, when the multi-core cable is bent, the individual signal lines included in the anti-twist signal line can be used. Smooth movement in the longitudinal direction. Therefore, even when the multi-core cable is repeatedly bent, it is possible to suppress the local force applied to the signal line and particularly improve the bending resistance of the signal line and the multi-core cable including the signal line.
Further, by making the twisting direction of the twisted signal line and the plurality of power lines the same as the twisting direction of the signal line in the twisted signal line, when the multi-core cable is bent, the power line or the twisted signal line is used. Can be smoothly moved in the longitudinal direction. Therefore, even when the multi-core cable is repeatedly bent, the local force is suppressed from being applied to the power line and the signal line, and the bending resistance of the multi-core cable including the power line, the signal line, the power line and the signal line is improved. Especially enhanced.

［本開示の実施形態の詳細］
本開示の一実施形態（以下「本実施形態」と記す）に係る多芯ケーブルの具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内での全ての変更が含まれることが意図される。 [Details of Embodiments of the present disclosure]
A specific example of the multi-core cable according to one embodiment of the present disclosure (hereinafter referred to as “the present embodiment”) will be described below with reference to the drawings. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

まず、本実施形態の多芯ケーブルの構成例について、図１〜図３に基づき説明する。 First, a configuration example of the multi-core cable of the present embodiment will be described with reference to FIGS. 1 to 3.

図１に本実施形態の多芯ケーブル１０の長手方向と垂直な面での断面図を示す。また、図２に本実施形態の他の構成例の多芯ケーブル２０の長手方向と垂直な面での断面図を、図３に本実施形態の他の構成例の多芯ケーブル３０の長手方向と垂直な面での断面図をそれぞれ示す。 FIG. 1 shows a cross-sectional view of the multi-core cable 10 of the present embodiment in a plane perpendicular to the longitudinal direction. Further, FIG. 2 shows a cross-sectional view of the multi-core cable 20 of the other configuration example of the present embodiment in a plane perpendicular to the longitudinal direction, and FIG. 3 shows a longitudinal direction of the multi-core cable 30 of the other configuration example of the present embodiment. The cross-sectional views on the plane perpendicular to and are shown respectively.

図１〜図３に示すように、本実施形態の多芯ケーブル１０、２０、３０は、複数の電力線１１と、複数の電力線１１を覆う外周被膜１４とを備えることができる。図１〜図３ではいずれも、２本の電力線１１を有する場合を例に示しているが、係る形態に限定されず、本実施形態の多芯ケーブルは、３本以上の電力線１１を有することもできる。 As shown in FIGS. 1 to 3, the multi-core cables 10, 20, and 30 of the present embodiment can include a plurality of power lines 11 and an outer peripheral coating 14 that covers the plurality of power lines 11. Although the case where each of FIGS. 1 to 3 has two power lines 11 is shown as an example, the present invention is not limited to this embodiment, and the multi-core cable of the present embodiment has three or more power lines 11. You can also.

本実施形態の多芯ケーブルは、電力線以外にも、接続する機器や印加する電圧等に応じて各種被覆電線を含むことができる。なお、被覆電線とは、導体と、導体を覆う絶縁層とを有する電線を意味し、信号線や、電線が挙げられる。図１に示した多芯ケーブル１０は、２本の電力線１１に加えて、２本の信号線１２１を含む対撚信号線１２を有している。 The multi-core cable of the present embodiment may include various coated electric wires in addition to the power line, depending on the equipment to be connected, the voltage to be applied, and the like. The covered electric wire means an electric wire having a conductor and an insulating layer covering the conductor, and examples thereof include a signal line and an electric wire. The multi-core cable 10 shown in FIG. 1 has a twisted signal line 12 including two signal lines 121 in addition to the two power lines 11.

図２に示した多芯ケーブル２０は、２本の電力線１１に加えて、２本の信号線１２１を含む対撚信号線１２と、１本の電線２１を有している。 The multi-core cable 20 shown in FIG. 2 has a twisted signal line 12 including two signal lines 121 and one electric wire 21 in addition to the two power lines 11.

図３に示した多芯ケーブル３０は、２本の電力線１１に加えて、２本の信号線１２１を含む対撚信号線１２を２本有している。このように、多芯ケーブルは、複数の電力線以外にも任意の構成の被覆電線を、任意の本数有することができる。 The multi-core cable 30 shown in FIG. 3 has two twisted signal lines 12 including two signal lines 121 in addition to the two power lines 11. As described above, the multi-core cable can have an arbitrary number of covered electric wires having an arbitrary configuration in addition to the plurality of power lines.

本実施形態の多芯ケーブルが有する部材について以下に説明する。 The members included in the multi-core cable of this embodiment will be described below.

（１−１）電力線
ここで、図４に、電力線１１の導体部分の側面図を示す。図４では、中心に配置した第１導体１１１が見えるように、第１導体１１１の長さと、第２導体１１２の長さとを変え、模式的に示している。図４に示すように、電力線１１は複数の導体を備えており、具体的には中心に配置された１本の第１導体１１１と、第１導体１１１の外周に配置された複数の第２導体１１２とを備え、第１導体１１１と、第２導体１１２とが撚り合わされている。 (1-1) Power Line Here, FIG. 4 shows a side view of the conductor portion of the power line 11. In FIG. 4, the length of the first conductor 111 and the length of the second conductor 112 are changed and shown schematically so that the first conductor 111 arranged at the center can be seen. As shown in FIG. 4, the power line 11 includes a plurality of conductors, specifically, one first conductor 111 arranged at the center and a plurality of second conductors arranged on the outer periphery of the first conductor 111. The conductor 112 is provided, and the first conductor 111 and the second conductor 112 are twisted together.

また、第１導体１１１、第２導体１１２はそれぞれ複数の素線、すなわち複数のフィラメントが撚り合わされている。第１導体１１１は、複数の第１素線４１が撚り合わされている。第２導体１１２は、複数の第２素線４２が撚り合わされている。 Further, each of the first conductor 111 and the second conductor 112 has a plurality of strands, that is, a plurality of filaments twisted together. A plurality of first strands 41 are twisted together in the first conductor 111. A plurality of second strands 42 are twisted together in the second conductor 112.

電力線１１が有する第２導体１１２の本数は、電力線に要求される抵抗値等に応じて選択することができ、特に限定されないが、例えば６本以上１２本以下であることが好ましい。第２導体１１２の本数を６本以上とすることで、電力線１１の外周の凹凸を抑制し、取扱い性を高めることができる。また、第２導体１１２の本数を１２本以下とすることで、電力線１１の生産性を高めることができる。 The number of the second conductors 112 included in the power line 11 can be selected according to the resistance value required for the power line and the like, and is not particularly limited, but is preferably 6 or more and 12 or less, for example. By setting the number of the second conductors 112 to 6 or more, it is possible to suppress the unevenness of the outer periphery of the power line 11 and improve the handleability. Further, by reducing the number of the second conductors 112 to 12 or less, the productivity of the power line 11 can be increased.

また、第１素線４１や、第２素線４２の素線径も特に限定されないが、例えば０．０５ｍｍ以上０．１５ｍｍ以下であることが好ましく、０．０５ｍｍ以上０．１０ｍｍ以下であることがより好ましい。第１素線４１や、第２素線４２の素線径を０．０５ｍｍ以上とすることで、破断強度を維持し、第１導体１１１や、第２導体１１２の取扱い性を高めることができる。また、素線径を０．０５ｍｍ以上とすることで、取扱い性を高めることができるため、第１導体１１１や、第２導体１１２の生産性を高めることができる。第１素線４１や、第２素線４２の素線径を０．１５ｍｍ以下とすることで、切れにくくすることができ、電力線１１や、電力線１１を含む多芯ケーブルの耐屈曲性を特に高めることができる。 The wire diameter of the first wire 41 and the second wire 42 is also not particularly limited, but is preferably 0.05 mm or more and 0.15 mm or less, and is 0.05 mm or more and 0.10 mm or less. Is more preferable. By setting the wire diameter of the first wire 41 and the second wire 42 to 0.05 mm or more, the breaking strength can be maintained and the handleability of the first conductor 111 and the second conductor 112 can be improved. .. Further, by setting the wire diameter to 0.05 mm or more, the handleability can be improved, so that the productivity of the first conductor 111 and the second conductor 112 can be improved. By setting the wire diameter of the first wire 41 and the second wire 42 to 0.15 mm or less, it can be made difficult to cut, and the bending resistance of the power line 11 and the multi-core cable including the power line 11 is particularly improved. Can be enhanced.

第１素線４１の素線径と、第２素線４２の素線径とは同じであっても良く、異なっていても良い。ただし、第１素線４１の素線径と、第２素線４２の素線径とは同じであるほうが、用意する素線の種類を抑制でき、生産性を高めることができるため好ましい。 The wire diameter of the first wire 41 and the wire diameter of the second wire 42 may be the same or different. However, it is preferable that the wire diameter of the first wire 41 and the wire diameter of the second wire 42 are the same because the types of wires to be prepared can be suppressed and the productivity can be increased.

第１導体１１１が有する素線の本数は特に限定されないが、例えば１０本以上１００本以下とすることが好ましく、１０本以上４９本以下とすることがより好ましい。また、第２導体１１２が有する素線の本数も特に限定されないが、例えば１０本以上１００本以下とすることが好ましく、１０本以上４９本以下とすることがより好ましい。第１導体１１１が有する素線の本数と、第２導体１１２が有する素線の本数とは同じであっても良く、異なっていても良い。多芯ケーブル全体では、例えば８０本以上１３００本以下の素線を有することができる。 The number of strands of the first conductor 111 is not particularly limited, but is preferably 10 or more and 100 or less, and more preferably 10 or more and 49 or less. The number of strands of the second conductor 112 is also not particularly limited, but is preferably 10 or more and 100 or less, and more preferably 10 or more and 49 or less. The number of strands of the first conductor 111 and the number of strands of the second conductor 112 may be the same or different. The entire multi-core cable can have, for example, 80 or more and 1300 or less strands.

第１導体１１１、第２導体１１２が有する素線の本数を１０本以上とすることで、第１導体１１１、第２導体１１２の強度を十分に高めることができる。また、第１導体１１１、第２導体１１２が有する素線の本数を１００本以下とすることで、第１導体１１１、第２導体１１２の外径を抑制できる。第１導体１１１、第２導体１１２の外径を抑制することで、電力線１１の外径を抑制し、取扱い性を高めることができる。第１導体１１１、第２導体１１２の外径は特に限定されないが、例えばそれぞれ０．４ｍｍ以上１．０ｍｍ以下とすることができる。第１導体１１１、第２導体１１２の断面積は特に限定されないが、例えばそれぞれ０．１ｍｍ２以上０．５ｍｍ２以下とすることができる。 By setting the number of strands of the first conductor 111 and the second conductor 112 to 10 or more, the strength of the first conductor 111 and the second conductor 112 can be sufficiently increased. Further, by setting the number of strands of the first conductor 111 and the second conductor 112 to 100 or less, the outer diameters of the first conductor 111 and the second conductor 112 can be suppressed. By suppressing the outer diameters of the first conductor 111 and the second conductor 112, the outer diameter of the power line 11 can be suppressed and the handleability can be improved. The outer diameters of the first conductor 111 and the second conductor 112 are not particularly limited, but may be, for example, 0.4 mm or more and 1.0 mm or less, respectively. The first conductor 111, the cross-sectional area of the second conductor 112 is not particularly limited, it can be, for example, a respective 0.1 mm 2 or more 0.5 mm 2 or less.

第１素線４１や、第２素線４２の材料は特に限定されず、第１素線４１や、第２素線４２として、銅または銅合金から構成された線を用いることができる。第１素線４１や、第２素線４２は、銅や銅合金の他に、錫めっき軟銅線や軟銅線等のような所定の導電性と柔軟性を有する材料で構成することもできる。第１素線４１や、第２素線４２を硬銅線で構成してもよい。 The material of the first wire 41 and the second wire 42 is not particularly limited, and a wire made of copper or a copper alloy can be used as the first wire 41 or the second wire 42. The first wire 41 and the second wire 42 may be made of a material having predetermined conductivity and flexibility, such as a tin-plated annealed copper wire or an annealed copper wire, in addition to copper or a copper alloy. The first wire 41 and the second wire 42 may be made of a hard copper wire.

第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向とを異なる方向とすることで、第１導体１１１と、第２導体１１２とを撚り合せた際に、電力線１１の表面の凹凸を抑制し、外観をよくすることができる。このため、従来は、第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向とを異なる方向とすることがなされていた。 By setting the twisting direction of the first wire 41 in the first conductor 111 and the twisting direction of the second wire 42 in the second conductor 112 to be different directions, the first conductor 111 and the second conductor 112 are twisted. When combined, the unevenness of the surface of the power line 11 can be suppressed and the appearance can be improved. Therefore, conventionally, the twisting direction of the first wire 41 in the first conductor 111 and the twisting direction of the second wire 42 in the second conductor 112 have been set to be different directions.

しかしながら、本発明の発明者らの検討によれば、第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向とを同一（同一方向）とすることで、多芯ケーブルの耐屈曲性を高めることができる。多芯ケーブルの耐屈曲性を特に高める観点から、第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向と、電力線１１における第１導体１１１および第２導体１１２の撚り方向とが同一であることが好ましい。 However, according to the study by the inventors of the present invention, the twisting direction of the first wire 41 in the first conductor 111 and the twisting direction of the second wire 42 in the second conductor 112 are the same (same direction). By doing so, the bending resistance of the multi-core cable can be improved. From the viewpoint of particularly enhancing the bending resistance of the multi-core cable, the twist direction of the first wire 41 in the first conductor 111, the twist direction of the second wire 42 in the second conductor 112, and the twist direction of the first conductor 111 in the power wire 11. And it is preferable that the twist direction of the second conductor 112 is the same.

第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向とを同一とすることで、第１導体１１１と、第２導体１１２とが接する箇所において、第１素線４１の向きと第２素線４２の向きとを揃えることができる。このため、電力線１１を含む多芯ケーブルを屈曲した際に、素線間の擦れを抑制し、さらには素線に傷が生じることを抑制できる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、第１素線４１や、第２素線４２が切れることを抑制し、電力線１１の耐屈曲性を高められる。 By making the twisting direction of the first wire 41 in the first conductor 111 and the twisting direction of the second wire 42 in the second conductor 112 the same, a place where the first conductor 111 and the second conductor 112 come into contact with each other. In, the direction of the first conductor 41 and the direction of the second conductor 42 can be aligned. Therefore, when the multi-core cable including the power line 11 is bent, rubbing between the strands can be suppressed, and further, scratches on the strands can be suppressed. Therefore, even when the multi-core cable is repeatedly bent, it is possible to prevent the first wire 41 and the second wire 42 from being cut, and to improve the bending resistance of the power line 11.

第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向とを同一とすることで、第１導体１１１と、第２導体１１２とを製造する際に撚り方向を切り替える必要が無くなり、生産性を高めることもできる。 The first conductor 111 and the second conductor 112 are manufactured by making the twisting direction of the first wire 41 in the first conductor 111 and the twisting direction of the second wire 42 in the second conductor 112 the same. It is not necessary to switch the twisting direction at that time, and productivity can be improved.

さらに、上述のように、第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向と、電力線１１における第１導体１１１と第２導体１１２との撚り方向とを同一とすることで、特に素線間の擦れを抑制し、素線に傷が生じることを抑制できる。このため、電力線１１の耐屈曲性を特に高められる。 Further, as described above, the twisting direction of the first wire 41 in the first conductor 111, the twisting direction of the second wire 42 in the second conductor 112, and the first conductor 111 and the second conductor 112 in the power line 11 By making the twisting direction of the wire the same, it is possible to suppress rubbing between the conductors and prevent scratches on the conductors. Therefore, the bending resistance of the power line 11 can be particularly enhanced.

既述の様に、本実施形態の多芯ケーブルは電力線以外にも、接続する機器や印加する電圧等に応じて信号線や、電線等の各種被覆電線を含むことができる。ただし、多芯ケーブルが含む被覆電線のうち、通常は電力線が最も太く、負荷が加わり易いため、多芯ケーブルを繰り返し屈曲させた場合に切断され易い。このため、上述のように電力線の耐屈曲性を高めることで、多芯ケーブル全体の耐屈曲性を高めることができる。 As described above, the multi-core cable of the present embodiment can include not only the power line but also a signal line and various coated electric wires such as electric wires depending on the equipment to be connected and the voltage to be applied. However, among the coated electric wires included in the multi-core cable, the power line is usually the thickest and the load is easily applied, so that the multi-core cable is easily cut when it is repeatedly bent. Therefore, by increasing the bending resistance of the power line as described above, the bending resistance of the entire multi-core cable can be improved.

第１素線４１の撚りピッチと、第２素線４２の撚りピッチとは特に限定されないが、８ｍｍ以上２２ｍｍ以下であることが好ましく、１０ｍｍ以上１４ｍｍ以下であることがより好ましい。特に、第１素線４１の撚りピッチは、８ｍｍ以上１６ｍｍ以下であることが好ましい。第２素線４２の撚りピッチは、８ｍｍ以上１８ｍｍ以下であることが好ましい。 The twist pitch of the first wire 41 and the twist pitch of the second wire 42 are not particularly limited, but are preferably 8 mm or more and 22 mm or less, and more preferably 10 mm or more and 14 mm or less. In particular, the twist pitch of the first wire 41 is preferably 8 mm or more and 16 mm or less. The twist pitch of the second wire 42 is preferably 8 mm or more and 18 mm or less.

第１素線４１の撚りピッチと、第２素線４２の撚りピッチを８ｍｍ以上とすることで、第１導体１１１、および第２導体１１２の生産性を高めることができる。第１素線４１の撚りピッチと、第２素線４２の撚りピッチを１０ｍｍ以上とすることで、第１導体１１１、および第２導体１１２の生産性を特に高めることができる。 By setting the twist pitch of the first wire 41 and the twist pitch of the second wire 42 to 8 mm or more, the productivity of the first conductor 111 and the second conductor 112 can be increased. By setting the twist pitch of the first wire 41 and the twist pitch of the second wire 42 to 10 mm or more, the productivity of the first conductor 111 and the second conductor 112 can be particularly increased.

第１素線４１の撚りピッチと、第２素線４２の撚りピッチとを２２ｍｍ以下とすることで、第１導体１１１、および第２導体１１２の長手方向の単位長さ当りの素線の充填密度を高くし、第１導体１１１、第２導体１１２の強度を高めることができる。このため、第１素線４１の撚りピッチと、第２素線４２の撚りピッチとを２２ｍｍ以下とすることで、電力線１１や、電力線１１を含む多芯ケーブルの耐屈曲性をさらに高めることができる。第１素線４１の撚りピッチと、第２素線４２の撚りピッチとを１４ｍｍ以下とすることで、第１導体１１１、第２導体１１２の強度を特に高め、電力線１１や、電力線１１を含む多芯ケーブルの耐屈曲性を特に高めることができる。 By setting the twist pitch of the first wire 41 and the twist pitch of the second wire 42 to 22 mm or less, the first conductor 111 and the second conductor 112 are filled with wires per unit length in the longitudinal direction. The density can be increased to increase the strength of the first conductor 111 and the second conductor 112. Therefore, by setting the twist pitch of the first wire 41 and the twist pitch of the second wire 42 to 22 mm or less, the bending resistance of the power line 11 and the multi-core cable including the power line 11 can be further improved. it can. By setting the twist pitch of the first wire 41 and the twist pitch of the second wire 42 to 14 mm or less, the strength of the first conductor 111 and the second conductor 112 is particularly increased, and the power line 11 and the power line 11 are included. The bending resistance of the multi-core cable can be particularly improved.

第１素線４１の撚りピッチと、第２素線４２の撚りピッチとは同じであっても良く、異なっていても良い。ただし、特に多芯ケーブルの耐屈曲性を高める観点から、第１素線の撚りピッチが、第２素線の撚りピッチよりも短い方が好ましい。電力線１１に含まれる第１導体１１１、および第２導体１１２のうち、中心に配置した第１導体１１１は長手方向に沿って引っ張られ易い。このため、第２導体１１２に含まれる第２素線４２よりも、第１導体１１１に含まれる第１素線４１の撚りピッチを短くし、第１導体１１１の強度を十分に高めることで、電力線１１や、電力線１１を含む多芯ケーブルの耐屈曲性を特に高められるからである。 The twist pitch of the first wire 41 and the twist pitch of the second wire 42 may be the same or different. However, from the viewpoint of improving the bending resistance of the multi-core cable, it is preferable that the twist pitch of the first wire is shorter than the twist pitch of the second wire. Of the first conductor 111 and the second conductor 112 included in the power line 11, the first conductor 111 arranged at the center is likely to be pulled along the longitudinal direction. Therefore, the twist pitch of the first wire 41 included in the first conductor 111 is shorter than that of the second wire 42 included in the second conductor 112, and the strength of the first conductor 111 is sufficiently increased. This is because the bending resistance of the power line 11 and the multi-core cable including the power line 11 can be particularly enhanced.

第２素線４２の撚りピッチは、第１素線４１の撚りピッチの１．０倍以上２．２倍以下であることが好ましく、１．１倍以上１．４倍以下であることがより好ましい。なお、第２素線４２の撚りピッチの第１素線４１の撚りピッチに対する比率は、第２素線の撚りピッチ／第１素線の撚りピッチにより算出できる。 The twist pitch of the second wire 42 is preferably 1.0 times or more and 2.2 times or less, and more preferably 1.1 times or more and 1.4 times or less of the twist pitch of the first wire 41. preferable. The ratio of the twist pitch of the second wire 42 to the twist pitch of the first wire 41 can be calculated by the twist pitch of the second wire / the twist pitch of the first wire.

第１導体１１１と、第２導体１１２とは撚りピッチを同じとすることもできるため、第２素線４２の撚りピッチは、第１素線４１の撚りピッチの１．０倍以上にできる。既述の様に電力線１１に含まれる第１導体１１１、および第２導体１１２のうち、中心に配置した第１導体１１１は長手方向に沿って引っ張られ易いため、第１導体１１１の強度を高めることが好ましい。ただし、第２導体１１２は、第１導体１１１と比較して長手方向に引っ張られにくいため、第２素線４２の撚りピッチを、第１素線４１の撚りピッチの１．１倍以上とすることで、電力線の耐屈曲性に影響を与えず、生産性を高めることができる。 Since the twist pitch of the first conductor 111 and the second conductor 112 can be the same, the twist pitch of the second wire 42 can be 1.0 times or more the twist pitch of the first conductor 41. Of the first conductor 111 and the second conductor 112 included in the power line 11 as described above, the first conductor 111 arranged at the center is easily pulled along the longitudinal direction, so that the strength of the first conductor 111 is increased. Is preferable. However, since the second conductor 112 is less likely to be pulled in the longitudinal direction than the first conductor 111, the twist pitch of the second wire 42 is set to 1.1 times or more the twist pitch of the first wire 41. As a result, the productivity can be improved without affecting the bending resistance of the power line.

第２素線４２の撚りピッチの第１素線４１に対する比率を２．２倍以下とすることで、第２導体１１２の強度を十分に高くすることができる。特に、第２素線４２の撚りピッチを、第１素線４１の撚りピッチの１．４倍以下とすることで、第２導体１１２の強度を十分に高くし、電力線１１や、電力線１１を含む多芯ケーブルの耐屈曲性を特に高めることができる。 By setting the ratio of the twist pitch of the second wire 42 to the first wire 41 to 2.2 times or less, the strength of the second conductor 112 can be sufficiently increased. In particular, by setting the twist pitch of the second wire 42 to 1.4 times or less the twist pitch of the first wire 41, the strength of the second conductor 112 is sufficiently increased, and the power line 11 and the power line 11 are made. The bending resistance of the multi-core cable including the cable can be particularly enhanced.

図１等に示したように、本実施形態の多芯ケーブルは、複数の電力線１１を有することができる。複数の電力線１１は撚り合わせておくこともできる。複数の電力線１１を撚り合わせる場合、複数の電力線１１の撚り方向が、第１導体１１１における第１素線４１の撚り方向と、第２導体１１２における第２素線４２の撚り方向と、電力線１１における第１導体１１１および第２導体１１２の撚り方向と、同一であることが好ましい。 As shown in FIG. 1 and the like, the multi-core cable of the present embodiment can have a plurality of power lines 11. The plurality of power lines 11 can also be twisted together. When a plurality of power lines 11 are twisted together, the twisting directions of the plurality of power lines 11 are the twisting direction of the first wire 41 in the first conductor 111, the twisting direction of the second wire 42 in the second conductor 112, and the power line 11. It is preferable that the twist directions of the first conductor 111 and the second conductor 112 are the same as those in the above.

複数の電力線１１の撚り方向を、第１導体１１１における第１素線４１の撚り方向、第２導体１１２における第２素線４２の撚り方向、電力線１１における第１導体１１１と第２導体１１２との撚り方向と同一とすることで、多芯ケーブルを屈曲した際に、撚り合わせた電力線に含まれる個々の電力線１１の長手方向の移動を円滑にできる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、電力線１１に局所的に力が加わることを抑制し、電力線１１や、電力線１１を含む多芯ケーブルの耐屈曲性を特に高められる。 The twisting directions of the plurality of power wires 11 are the twisting direction of the first wire 41 in the first conductor 111, the twisting direction of the second wire 42 in the second conductor 112, and the first conductor 111 and the second conductor 112 in the power wire 11. By making it the same as the twisting direction of the above, when the multi-core cable is bent, the movement of the individual power lines 11 included in the twisted power lines in the longitudinal direction can be smoothly performed. Therefore, even when the multi-core cable is repeatedly bent, it is possible to suppress local force from being applied to the power line 11, and the bending resistance of the power line 11 and the multi-core cable including the power line 11 can be particularly enhanced.

電力線１１は、例えば電動パーキングブレーキ（Ｅｌｅｃｔｒｉｃ Ｐａｒｋｉｎｇ Ｂｒａｋｅ：ＥＰＢ）と、電子制御装置（Ｅｌｅｃｔｒｉｃ Ｃｏｎｔｒｏｌ Ｕｎｉｔ：ＥＣＵ）とを接続するために用いることができる。ＥＰＢは、ブレーキキャリパーを駆動するモータを有している。例えば、多芯ケーブルが２本の電力線を含む場合、一方の電力線１１は上記モータへ電力を供給する給電線として用い、他方の電力線１１は該モータのアース線として用いることができる。 The power line 11 can be used, for example, to connect an electric parking brake (EPB) and an electronic control unit (Electric Control Unit: ECU). The EPB has a motor that drives the brake caliper. For example, when the multi-core cable includes two power lines, one power line 11 can be used as a power supply line for supplying power to the motor, and the other power line 11 can be used as a ground line for the motor.

電力線１１は、第１導体１１１、および第２導体１１２の外周を第１の絶縁層１１３で被覆しておくことができる。第１の絶縁層１１３は、合成樹脂を主成分とする組成物により形成でき、第１導体１１１、および第２導体１１２の外周に積層されることで第１導体１１１、および第２導体１１２を被覆する。第１の絶縁層１１３の平均厚みとしては、特に限定されないが、例えば０．１ｍｍ以上５ｍｍ以下とすることができる。ここで「平均厚み」とは、任意の十点において測定した厚みの平均値をいう。なお、以下において他の部材等に対して「平均厚み」という場合にも同様に定義される。 The power line 11 can cover the outer periphery of the first conductor 111 and the second conductor 112 with the first insulating layer 113. The first insulating layer 113 can be formed of a composition containing a synthetic resin as a main component, and can be laminated on the outer periphery of the first conductor 111 and the second conductor 112 to form the first conductor 111 and the second conductor 112. Cover. The average thickness of the first insulating layer 113 is not particularly limited, but may be, for example, 0.1 mm or more and 5 mm or less. Here, the "average thickness" means the average value of the thickness measured at any ten points. In the following, the term "average thickness" for other members and the like is also defined in the same manner.

第１の絶縁層１１３の主成分は、絶縁性を有するものであれば特に限定されないが、低温下における耐屈曲性向上の観点から、エチレンとカルボニル基を有するαオレフィンとの共重合体（以下、主成分樹脂ともいう）が好ましい。上記主成分樹脂のカルボニル基を有するαオレフィン含有量の下限としては、１４質量％が好ましく、１５質量％がより好ましい。一方、上記カルボニル基を有するαオレフィン含有量の上限としては、４６質量％が好ましく、３０質量％がより好ましい。上記カルボニル基を有するαオレフィン含有量を上記下限以上とすることで、低温での耐屈曲性を特に高めることができるため好ましい。また、上記カルボニル基を有するαオレフィン含有量を上記上限以下とすることで、第１の絶縁層１１３の強度等の機械的特性を高めることができ、好ましい。 The main component of the first insulating layer 113 is not particularly limited as long as it has insulating properties, but from the viewpoint of improving bending resistance at low temperatures, a copolymer of ethylene and an α-olefin having a carbonyl group (hereinafter referred to as a copolymer). , Also referred to as the main component resin) is preferable. The lower limit of the α-olefin content having a carbonyl group of the main component resin is preferably 14% by mass, more preferably 15% by mass. On the other hand, the upper limit of the α-olefin content having a carbonyl group is preferably 46% by mass, more preferably 30% by mass. By setting the content of the α-olefin having a carbonyl group to the above lower limit or more, the bending resistance at a low temperature can be particularly enhanced, which is preferable. Further, by setting the content of the α-olefin having a carbonyl group to the above upper limit or less, the mechanical properties such as the strength of the first insulating layer 113 can be enhanced, which is preferable.

カルボニル基を有するαオレフィンとしては、（メタ）アクリル酸メチル、（メタ）アクリル酸エチル等の（メタ）アクリル酸アルキルエステル；（メタ）アクリル酸フェニル等の（メタ）アクリル酸アリールエステル；酢酸ビニル、プロピオン酸ビニル等のビニルエステル；（メタ）アクリル酸、クロトン酸、マレイン酸、イタコン酸等の不飽和酸；メチルビニルケトン、フェニルビニルケトン等のビニルケトン；（メタ）アクリル酸アミド等から選択された１種類以上を含むことが好ましい。これらの中でも、（メタ）アクリル酸アルキルエステルおよびビニルエステルから選択された１種類以上がより好ましく、アクリル酸エチルおよび酢酸ビニルから選択された１種類以上がさらに好ましい。 Examples of the α-olefin having a carbonyl group include (meth) acrylic acid alkyl esters such as methyl (meth) acrylate and (meth) ethyl acrylate; (meth) acrylic acid aryl esters such as (meth) phenyl acrylate; vinyl acetate. , Vinyl esters such as vinyl propionate; unsaturated acids such as (meth) acrylic acid, crotonic acid, maleic acid, and itaconic acid; vinyl ketones such as methyl vinyl ketone and phenyl vinyl ketone; selected from (meth) acrylic acid amide and the like. It is preferable to include one or more types. Among these, one or more selected from (meth) acrylic acid alkyl ester and vinyl ester are more preferable, and one or more selected from ethyl acrylate and vinyl acetate are further preferable.

上記主成分樹脂としては、例えばエチレン−酢酸ビニル共重合体（ＥＶＡ）、エチレン−エチルアクリレート共重合体（ＥＥＡ）、エチレン−メチルアクリレート共重合体（ＥＭＡ）、エチレン−ブチルアクリレート共重合体（ＥＢＡ）等の樹脂が挙げられ、これらの中でもＥＶＡおよびＥＥＡから選択された１種類以上が好ましい。 Examples of the main component resin include ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), and ethylene-butyl acrylate copolymer (EBA). ) And the like, and among these, one or more kinds selected from EVA and EEA are preferable.

第１の絶縁層１１３は、難燃剤、難燃助剤、酸化防止剤、滑剤、着色剤、反射付与剤、隠蔽剤、加工安定剤、可塑剤等の添加剤を含有していてもよい。また、第１の絶縁層１１３は、上記主成分樹脂以外のその他の樹脂を含有してもよい。 The first insulating layer 113 may contain additives such as a flame retardant, a flame retardant aid, an antioxidant, a lubricant, a colorant, a reflection-imparting agent, a concealing agent, a processing stabilizer, and a plasticizer. Further, the first insulating layer 113 may contain a resin other than the main component resin.

その他の樹脂の含有量の上限としては、５０質量％が好ましく、３０質量％がより好ましく、１０質量％がさらに好ましい。また、第１の絶縁層１１３は、その他の樹脂を実質的に含有しなくてもよい。 The upper limit of the content of the other resin is preferably 50% by mass, more preferably 30% by mass, still more preferably 10% by mass. Further, the first insulating layer 113 does not have to substantially contain other resins.

上記難燃剤としては、臭素系難燃剤、塩素系難燃剤等のハロゲン系難燃剤、金属水酸化物、窒素系難燃剤、リン系難燃剤等のノンハロゲン系難燃剤等が挙げられる。難燃剤は、１種単独で、または２種類以上を組み合わせて用いることができる。 Examples of the flame retardant include halogen-based flame retardants such as brominated flame retardants and chlorine-based flame retardants, and non-halogen flame retardants such as metal hydroxides, nitrogen-based flame retardants and phosphorus-based flame retardants. The flame retardant may be used alone or in combination of two or more.

臭素系難燃剤としては、例えばデカブロモジフェニルエタン等が挙げられる。塩素系難燃剤としては、例えば塩素化パラフィン、塩素化ポリエチレン、塩素化ポリフェノール、パークロルペンタシクロデカン等が挙げられる。金属水酸化物としては、例えば水酸化マグネシウム、水酸化アルミニウム等が挙げられる。窒素系難燃剤としては、例えばメラミンシアヌレート、トリアジン、イソシアヌレート、尿素、グアニジン等が挙げられる。リン系難燃剤としては、例えばホスフィン酸金属塩、ホスファフェナントレン、リン酸メラミン、リン酸アンモニウム、リン酸エステル、ポリホスファゼン等が挙げられる。 Examples of the brominated flame retardant include decabromodiphenylethane and the like. Examples of the chlorine-based flame retardant include chlorinated paraffin, chlorinated polyethylene, chlorinated polyphenol, and perchlorpentacyclodecane. Examples of the metal hydroxide include magnesium hydroxide and aluminum hydroxide. Examples of the nitrogen-based flame retardant include melamine cyanurate, triazine, isocyanurate, urea, guanidine and the like. Examples of the phosphorus-based flame retardant include phosphinic acid metal salt, phosphaphenanthrene, melamine phosphate, ammonium phosphate, phosphoric acid ester, polyphosphazene and the like.

難燃剤としては、環境負荷低減の観点からノンハロゲン系難燃剤が好ましく、金属水酸化物、窒素系難燃剤およびリン系難燃剤がより好ましい。 As the flame retardant, a non-halogen flame retardant is preferable from the viewpoint of reducing the environmental load, and a metal hydroxide, a nitrogen flame retardant and a phosphorus flame retardant are more preferable.

第１の絶縁層１１３が難燃剤を含有する場合、第１の絶縁層１１３における難燃剤の含有量の下限としては、樹脂成分１００質量部に対し、１０質量部が好ましく、５０質量部がより好ましい。一方、難燃剤の含有量の上限としては、樹脂成分１００質量部に対し、２００質量部が好ましく、１３０質量部がより好ましい。難燃剤の含有量が上記下限より小さいと、難燃効果を十分に付与できないおそれがある。逆に、難燃剤の含有量が上記上限を超えると、第１の絶縁層１１３の押出成型性を損なうおそれ、および伸びや引張強さ等の機械的特性を損なうおそれがある。 When the first insulating layer 113 contains a flame retardant, the lower limit of the content of the flame retardant in the first insulating layer 113 is preferably 10 parts by mass, more preferably 50 parts by mass, based on 100 parts by mass of the resin component. preferable. On the other hand, the upper limit of the content of the flame retardant is preferably 200 parts by mass and more preferably 130 parts by mass with respect to 100 parts by mass of the resin component. If the content of the flame retardant is less than the above lower limit, the flame retardant effect may not be sufficiently imparted. On the contrary, if the content of the flame retardant exceeds the above upper limit, the extrusion moldability of the first insulating layer 113 may be impaired, and the mechanical properties such as elongation and tensile strength may be impaired.

第１の絶縁層１１３は、樹脂成分が架橋されていることが好ましい。第１の絶縁層１１３の樹脂成分を架橋する方法としては、電離放射線を照射する方法、熱架橋剤を用いる方法、シラングラフトマーを用いる方法等が挙げられ、電離放射線を照射する方法が好ましい。また、架橋を促進するため、第１の絶縁層１１３を形成する組成物にはシランカップリング剤を添加することが好ましい。 It is preferable that the resin component of the first insulating layer 113 is crosslinked. Examples of the method of cross-linking the resin component of the first insulating layer 113 include a method of irradiating ionizing radiation, a method of using a thermal cross-linking agent, a method of using a silane grafter, and the like, and a method of irradiating ionizing radiation is preferable. Further, in order to promote cross-linking, it is preferable to add a silane coupling agent to the composition forming the first insulating layer 113.

既述の様に、本実施形態の多芯ケーブルは、電力線以外の被覆電線を含有することもできる。例えば信号線や、電線等を含むことができる。ここでは信号線、電線の構成例について説明する。 As described above, the multi-core cable of the present embodiment may include a covered electric wire other than the power line. For example, a signal line, an electric wire, or the like can be included. Here, a configuration example of a signal line and an electric wire will be described.

（１−２）信号線
信号線１２１は、第１導体１１１や、第２導体１１２より細い第３導体１２１１と、第３導体１２１１を覆う第２の絶縁層１２１２と、を含んでいる。信号線１２１は２本一組で撚り合わされて対撚信号線１２として構成することができる。長手方向に沿って撚り合わされる２本の信号線１２１は、互いに大きさおよび材料を同じとすることができる。対撚信号線１２の撚りピッチは特に限定されないが、例えば対撚信号線１２の撚り径（対撚信号線１２の外径）の４倍以上１０倍以下とすることができる。 (1-2) Signal line The signal line 121 includes a first conductor 111, a third conductor 1211 thinner than the second conductor 112, and a second insulating layer 1212 covering the third conductor 1211. The signal lines 121 can be twisted in pairs to form a pair twisted signal line 12. The two signal lines 121 twisted along the longitudinal direction can be of the same size and material from each other. The twist pitch of the anti-twist signal wire 12 is not particularly limited, but can be, for example, 4 times or more and 10 times or less the twist diameter of the anti-twist signal wire 12 (outer diameter of the anti-twist signal wire 12).

多芯ケーブルが、電力線１１に加えて、対撚信号線１２を有する場合、対撚信号線１２の外径は、電力線１１の外径とほぼ同じ大きさとすることができる。 When the multi-core cable has a twisted signal line 12 in addition to the power line 11, the outer diameter of the twisted signal line 12 can be substantially the same as the outer diameter of the power line 11.

信号線１２１は、センサからの信号を伝送するために用いることもできるし、ＥＣＵからの制御信号を伝送するために用いることもできる。２本の信号線１２１は、例えばアンチロックブレーキシステム（Ａｎｔｉ−ｌｏｃｋ Ｂｒａｋｅ Ｓｙｓｔｅｍ：ＡＢＳ）の配線に用いることができる。２本の信号線１２１はそれぞれ、例えば、差動式の車輪速センサと車両のＥＣＵとを接続する線として用いることができる。２本の信号線１２１を他の信号の伝送に用いてもよい。 The signal line 121 can be used for transmitting a signal from the sensor, or can be used for transmitting a control signal from the ECU. The two signal lines 121 can be used, for example, for wiring an anti-lock brake system (ABS). Each of the two signal lines 121 can be used, for example, as a line connecting the differential wheel speed sensor and the ECU of the vehicle. The two signal lines 121 may be used for transmission of other signals.

第３導体１２１１は、１本の導体から構成しても良いし、電力線１１と同様に複数本の導体を撚り合わされて構成してもよい。第３導体１２１１は、既述の第１導体１１１や、第２導体１１２を構成する導体と同じ材料で構成してもよいし、異なる材料を用いてもよい。第３導体１２１１の断面積は特に限定されないが、例えば０．１３ｍｍ２以上０．５ｍｍ２以下とすることができる。なお、信号線１２１は複数の第３導体１２１１を有することもできる。 The third conductor 1211 may be composed of one conductor, or may be formed by twisting a plurality of conductors like the power line 11. The third conductor 1211 may be made of the same material as the conductors constituting the first conductor 111 and the second conductor 112 described above, or may use different materials. The cross-sectional area of the third conductor 1211 is not particularly limited, but may be, for example, 0.13 mm 2 or more and 0.5 mm 2 or less. The signal line 121 may also have a plurality of third conductors 1211.

第２の絶縁層１２１２の材料は特に限定されないが、例えば、難燃剤が配合されることで難燃性が付与された架橋ポリエチレン等の難燃性のポリオレフィン系樹脂で形成することができる。第２の絶縁層１２１２を構成する材料としては、難燃性のポリオレフィン系樹脂に限られず、架橋フッ素系樹脂等の他の材料で形成しても良い。第２の絶縁層１２１２の外径は、例えば１．０ｍｍ以上２．２ｍｍ以下とすることができる。 The material of the second insulating layer 1212 is not particularly limited, and can be formed of, for example, a flame-retardant polyolefin resin such as cross-linked polyethylene to which flame retardancy is imparted by blending a flame retardant. The material constituting the second insulating layer 1212 is not limited to the flame-retardant polyolefin-based resin, and may be formed of another material such as a crosslinked fluorine-based resin. The outer diameter of the second insulating layer 1212 can be, for example, 1.0 mm or more and 2.2 mm or less.

本実施形態の多芯ケーブルが信号線を含む場合、図１〜図３に示した多芯ケーブル１０〜３０のように、本実施形態の多芯ケーブルは、電力線１１よりも断面積の小さい２本の信号線１２１を撚り合せた対撚信号線１２をさらに有することができる。 When the multi-core cable of the present embodiment includes a signal line, the multi-core cable of the present embodiment has a smaller cross-sectional area than the power line 11 as shown in the multi-core cables 10 to 30 shown in FIGS. Further, a pair twisted signal line 12 obtained by twisting the signal lines 121 of the book can be provided.

この場合、信号線１２１は、上述のように、複数の第３導体１２１１が撚り合わされ、信号線１２１における第３導体１２１１の撚り方向と、対撚信号線１２における信号線１２１の撚り方向とが同一であることが好ましい。 In this case, as described above, in the signal line 121, a plurality of third conductors 1211 are twisted together, and the twisting direction of the third conductor 1211 in the signal line 121 and the twisting direction of the signal line 121 in the anti-twisted signal line 12 are different. It is preferable that they are the same.

信号線１２１における第３導体１２１１の撚り方向と、対撚信号線１２における信号線１２１の撚り方向とを同一とすることで、多芯ケーブルを屈曲した際に、対撚信号線１２に含まれる個々の信号線１２１の長手方向の移動を円滑にできる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、信号線１２１に局所的に力が加わることを抑制し、信号線１２１や、信号線１２１を含む多芯ケーブルの耐屈曲性を特に高められる。 By making the twisting direction of the third conductor 1211 in the signal line 121 the same as the twisting direction of the signal line 121 in the twisted signal line 12, it is included in the twisted signal line 12 when the multi-core cable is bent. The movement of each signal line 121 in the longitudinal direction can be smoothly performed. Therefore, even when the multi-core cable is repeatedly bent, it is possible to suppress local force from being applied to the signal line 121, and the bending resistance of the signal line 121 and the multi-core cable including the signal line 121 can be particularly enhanced.

（１−３）電線
図２の多芯ケーブル２０に示したように、本実施形態の多芯ケーブルは、被覆電線として、電線２１を有することもできる。 (1-3) Electric Wire As shown in the multi-core cable 20 of FIG. 2, the multi-core cable of the present embodiment may have an electric wire 21 as a covered electric wire.

電線２１は、第１導体１１１や、第２導体１１２より細い第４導体２１１と、第４導体２１１を覆う第３の絶縁層２１２と、を含んでいる。電線２１は、大きさおよび材料が信号線１２１と同じであってもよい。 The electric wire 21 includes a first conductor 111, a fourth conductor 211 thinner than the second conductor 112, and a third insulating layer 212 covering the fourth conductor 211. The electric wire 21 may be the same in size and material as the signal line 121.

電線２１は、センサからの信号を伝送するために用いることもできるし、ＥＣＵからの制御信号を伝送するために用いることもできるし、電子機器へ電力を供給する給電線としても用いることができる。電線２１をアース線として利用することもできる。 The electric wire 21 can be used for transmitting a signal from a sensor, can be used for transmitting a control signal from an ECU, and can also be used as a feeding line for supplying electric power to an electronic device. .. The electric wire 21 can also be used as a ground wire.

第４導体２１１は、１本の導体から構成してもよいし、電力線１１と同様に複数本の導体を撚り合わせて構成してもよい。第４導体２１１は、第１導体１１１、第２導体１１２や、第３導体１２１１を構成する導体と同じ材料で構成してもよいし、異なる材料を用いてもよい。第４導体２１１の断面積は特に限定されないが、例えば０．１３ｍｍ２以上０．５ｍｍ２以下とすることができる。なお、電線２１は複数の第４導体２１１を有することもできる。 The fourth conductor 211 may be composed of one conductor, or may be formed by twisting a plurality of conductors like the power line 11. The fourth conductor 211 may be made of the same material as the conductors constituting the first conductor 111, the second conductor 112, and the third conductor 1211, or may use different materials. The cross-sectional area of the fourth conductor 211 is not particularly limited, but may be, for example, 0.13 mm 2 or more and 0.5 mm 2 or less. The electric wire 21 may also have a plurality of fourth conductors 211.

第３の絶縁層２１２は、第２の絶縁層１２１２と同じ材料を用いることができるし、異なる材料を用いてもよい。第３の絶縁層２１２の外径は、１．０ｍｍ以上２．２ｍｍ以下とすることができる。 The third insulating layer 212 may use the same material as the second insulating layer 1212, or may use a different material. The outer diameter of the third insulating layer 212 can be 1.0 mm or more and 2.2 mm or less.

２本の電線２１が用いられ、これらが撚り合わされて対撚電線が構成されてもよい。この場合、撚り合わされる２本の電線２１は、大きさおよび材料が同じであることが好ましい。電線を対撚電線とし、対撚信号線と共に多芯ケーブルに配置する場合、対撚電線は、対撚信号線１２と同じ方向に撚られていることが好ましい。また、この場合、対撚電線は、対撚信号線１２と撚りピッチが等しいことが好ましい。対撚電線の外径は、対撚信号線１２の外径とほぼ同じ大きさとすることができる。対撚電線の外径は、電力線１１の外径とほぼ同じ大きさとすることができる。 Two electric wires 21 may be used, and these may be twisted to form a countertwisted electric wire. In this case, it is preferable that the two electric wires 21 to be twisted have the same size and material. When the electric wire is a twisted electric wire and is arranged in the multi-core cable together with the twisted signal wire, the twisted electric wire is preferably twisted in the same direction as the twisted signal wire 12. Further, in this case, it is preferable that the twisted electric wire has the same twist pitch as the twisted signal wire 12. The outer diameter of the anti-twisted electric wire can be substantially the same as the outer diameter of the anti-twisted signal wire 12. The outer diameter of the anti-twisted wire can be substantially the same as the outer diameter of the power line 11.

既述の様に、本実施形態の多芯ケーブルが有する複数の被覆電線の構成は特に限定されず、多芯ケーブルを接続する機器等に応じて、任意の構成の被覆電線を、任意の本数有することができる。ただし、図１〜図３に示した多芯ケーブル１０、２０、３０の様に、多芯ケーブルは、複数の電力線１１に加えて、対撚信号線１２を含むことが好ましい。電力線１１と、対撚信号線１２とを備えた多芯ケーブルとすることで、各種用途で使用することができる、汎用性の高い多芯ケーブルとすることができるからである。 As described above, the configuration of the plurality of coated electric wires included in the multi-core cable of the present embodiment is not particularly limited, and an arbitrary number of coated electric wires having an arbitrary configuration can be used depending on the device or the like to which the multi-core cable is connected. Can have. However, like the multi-core cables 10, 20, and 30 shown in FIGS. 1 to 3, the multi-core cable preferably includes a twisted signal line 12 in addition to the plurality of power lines 11. This is because a multi-core cable including a power line 11 and a twisted signal line 12 can be used as a highly versatile multi-core cable that can be used for various purposes.

既述の様に、複数の電力線１１は撚り合せておくこともできる。また、本実施形態の多芯ケーブルが、信号線等の被覆電線をさらに有する場合、必要に応じて複数の電力線１１と、被覆電線等とをあわせて撚り合わせることもできる。 As described above, the plurality of power lines 11 can be twisted together. Further, when the multi-core cable of the present embodiment further has a covered electric wire such as a signal line, a plurality of power lines 11 and the coated electric wire or the like can be twisted together as needed.

具体的には例えば、図１に示した多芯ケーブル１０の場合であれば、２本の電力線１１と、１本の対撚信号線１２を撚り合せてコア１３を構成できる。また、図２に示した多芯ケーブル２０の場合、２本の電力線１１と、１本の対撚信号線１２と、電線２１とを撚り合せてコア２３を構成できる。図３に示した多芯ケーブル３０の場合、２本の電力線１１と、２本の対撚信号線１２とを撚り合せてコア３３を構成できる。 Specifically, for example, in the case of the multi-core cable 10 shown in FIG. 1, two power lines 11 and one anti-twisted signal line 12 can be twisted to form a core 13. Further, in the case of the multi-core cable 20 shown in FIG. 2, the core 23 can be formed by twisting two power lines 11, one anti-twisted signal line 12, and an electric wire 21. In the case of the multi-core cable 30 shown in FIG. 3, the core 33 can be formed by twisting the two power lines 11 and the two anti-twisted signal lines 12.

コアの全体の撚り径は特に限定されないが、例えば５．５ｍｍ以上９ｍｍ以下とすることができる。 The overall twist diameter of the core is not particularly limited, but can be, for example, 5.5 mm or more and 9 mm or less.

また、コアの撚りピッチについても特に限定されないが、例えばコアの撚り径の１２倍以上２４倍以下とすることができる。コアの撚りピッチをコアの撚り径の２４倍以下とすることで、撚りがゆるくなることを抑制し、耐屈曲性を特に高めることができる。また、コアの撚りピッチをコアの撚り径の１２倍以上とすることで、多芯ケーブルの生産性を特に高めることができる。 Further, the twist pitch of the core is not particularly limited, but can be, for example, 12 times or more and 24 times or less the twist diameter of the core. By setting the twist pitch of the core to 24 times or less the twist diameter of the core, it is possible to suppress loosening of the twist and particularly improve the bending resistance. Further, by setting the twist pitch of the core to 12 times or more the twist diameter of the core, the productivity of the multi-core cable can be particularly increased.

なお、コアが対撚信号線１２を含む場合、コアの撚りピッチのコアの撚り径に対する比率は、対撚信号線１２の撚りピッチの対撚信号線１２の撚り径に対する比率より大きいことが好ましい。コアの撚り方向は、複数の電力線１１の撚り方向と同一であることが好ましい。また、コアの撚り方向は、対撚信号線１２の撚り方向とも同一であることが好ましい。 When the core includes the anti-twisted signal wire 12, the ratio of the twist pitch of the core to the twist diameter of the core is preferably larger than the ratio of the twist pitch of the anti-twist signal wire 12 to the twist diameter of the anti-twist signal wire 12. .. The twisting direction of the core is preferably the same as the twisting direction of the plurality of power lines 11. Further, the twisting direction of the core is preferably the same as the twisting direction of the anti-twisted signal line 12.

本実施形態の多芯ケーブルが、図１等に示したように対撚信号線１２をさらに含む場合、上述のように対撚信号線１２と、複数の電力線１１とを撚り合せておくこともできる。この場合、対撚信号線１２と複数の電力線１１との撚り方向と、対撚信号線１２における信号線１２１の撚り方向とが同一であることが好ましい。 When the multi-core cable of the present embodiment further includes the twisted signal line 12 as shown in FIG. 1 and the like, the twisted signal line 12 and the plurality of power lines 11 may be twisted as described above. it can. In this case, it is preferable that the twisting direction of the twisted signal line 12 and the plurality of power lines 11 and the twisting direction of the signal line 121 in the twisted signal line 12 are the same.

対撚信号線１２と複数の電力線１１との撚り方向と、対撚信号線１２における信号線１２１の撚り方向とを同一とすることで、多芯ケーブルを屈曲した際に、電力線１１や、対撚信号線１２の長手方向の移動を円滑にできる。従って、多芯ケーブルを繰り返し屈曲させた場合でも、電力線１１や、信号線１２１に局所的に力が加わることを抑制し、電力線１１や、信号線１２１、電力線１１や信号線１２１を含む多芯ケーブルの耐屈曲性を特に高められる。 By making the twisting direction of the anti-twisted signal line 12 and the plurality of power lines 11 the same as the twisting direction of the signal lines 121 in the anti-twisted signal line 12, when the multi-core cable is bent, the power line 11 and the pair The stranded signal wire 12 can be smoothly moved in the longitudinal direction. Therefore, even when the multi-core cable is repeatedly bent, it is possible to suppress local force from being applied to the power line 11 and the signal line 121, and the multi-core including the power line 11, the signal line 121, the power line 11 and the signal line 121. The bending resistance of the cable can be particularly improved.

既述の様に、本実施形態の多芯ケーブルが対撚信号線１２を有する場合、対撚信号線１２は、例えば電力線１１よりも断面積の小さい２本の信号線１２１を撚り合せて形成できる。信号線１２１は、複数の第３導体１２１１が撚り合わされ、信号線１２１における第３導体１２１１の撚り方向と、対撚信号線１２における信号線１２１の撚り方向とが同一であることが好ましい。 As described above, when the multi-core cable of the present embodiment has the anti-twisted signal line 12, the anti-twisted signal line 12 is formed by twisting, for example, two signal lines 121 having a cross-sectional area smaller than that of the power line 11. it can. In the signal line 121, a plurality of third conductors 1211 are twisted together, and it is preferable that the twisting direction of the third conductor 1211 in the signal line 121 and the twisting direction of the signal line 121 in the anti-twisted signal line 12 are the same.

（２）外周被膜
ここまで説明したように、本実施形態の多芯ケーブルは、複数の電力線１１や、必要に応じて、信号線１２１、電線２１等の被覆電線を含むことができる。そして、本実施形態の多芯ケーブルは、複数の電力線１１を一括して覆う外周被膜１４を有することができる。なお、上述のように、本実施形態の多芯ケーブルが複数の電力線１１以外に、信号線１２１等の被覆電線を含有する場合には、外周被膜１４は、複数の電力線１１と、被覆電線とを一括して覆うように配置できる。 (2) Peripheral coating As described above, the multi-core cable of the present embodiment may include a plurality of power lines 11, and if necessary, covered electric wires such as signal lines 121 and electric wires 21. The multi-core cable of the present embodiment may have an outer peripheral coating 14 that collectively covers a plurality of power lines 11. As described above, when the multi-core cable of the present embodiment contains a coated electric wire such as a signal line 121 in addition to the plurality of power lines 11, the outer peripheral coating 14 includes the plurality of power lines 11 and the coated electric wire. Can be arranged so as to cover all at once.

外周被膜１４の構成は特に限定されず、単一の層から構成することもでき、２層以上の複数の層から構成することもできる。 The structure of the outer peripheral coating 14 is not particularly limited, and may be composed of a single layer or a plurality of layers of two or more layers.

具体的には例えば、外周被膜１４は、複数の電力線１１等を配置した多芯ケーブルの中心側から順に第１の被膜層１４１と、第２の被膜層１４２とを有することもできる。 Specifically, for example, the outer peripheral coating 14 may have a first coating layer 141 and a second coating layer 142 in order from the center side of a multi-core cable in which a plurality of power lines 11 and the like are arranged.

第１の被膜層１４１の主成分としては、柔軟性を有する合成樹脂であれば特に限定されず、例えばポリエチレンやＥＶＡ等のポリオレフィン、ポリウレタンエラストマー、ポリエステルエラストマー等が挙げられる。これらの合成樹脂は２種類以上を混合して用いてもよい。 The main component of the first coating layer 141 is not particularly limited as long as it is a flexible synthetic resin, and examples thereof include polyolefins such as polyethylene and EVA, polyurethane elastomers, polyester elastomers, and the like. Two or more kinds of these synthetic resins may be mixed and used.

第１の被膜層１４１の最小厚み、すなわちコアと第１の被膜層１４１の外周との最小距離は、０．３ｍｍ以上が好ましく、０．４ｍｍ以上がより好ましい。また、第１の被膜層１４１の最小厚みは、０．９ｍｍ以下が好ましく、０．８ｍｍ以下がより好ましい。 The minimum thickness of the first coating layer 141, that is, the minimum distance between the core and the outer circumference of the first coating layer 141 is preferably 0.3 mm or more, more preferably 0.4 mm or more. The minimum thickness of the first coating layer 141 is preferably 0.9 mm or less, more preferably 0.8 mm or less.

第１の被膜層１４１の外径は、６．０ｍｍ以上が好ましく、７．３ｍｍ以上がより好ましい。また、第１の被膜層１４１の外径は、１０ｍｍ以下が好ましく、９．３ｍｍ以下がより好ましい。 The outer diameter of the first coating layer 141 is preferably 6.0 mm or more, more preferably 7.3 mm or more. The outer diameter of the first coating layer 141 is preferably 10 mm or less, more preferably 9.3 mm or less.

多芯ケーブルの外側に配置される第２の被膜層１４２には難燃性が望まれることも多い。また、ＥＰＢ用ケーブル等の車両に搭載されるケーブルの場合、第２の被膜層１４２は走行中の石跳ね等によるダメージを受けやすく摩耗しやすい。従って、第２の被膜層１４２を形成する材料には耐外傷性や耐摩耗性に優れた樹脂が望まれる。さらにケーブルを柔軟なものにするため柔軟性に優れた材料が望まれる。 Flame retardancy is often desired for the second coating layer 142 arranged on the outside of the multi-core cable. Further, in the case of a cable mounted on a vehicle such as an EPB cable, the second coating layer 142 is easily damaged by stone splashing during traveling and is easily worn. Therefore, a resin having excellent traumatic resistance and abrasion resistance is desired as the material for forming the second coating layer 142. Further, in order to make the cable flexible, a material having excellent flexibility is desired.

第２の被膜層１４２の主成分としては、難燃性および耐摩耗性に優れた合成樹脂であれば特に限定されず、例えばポリウレタン等が挙げられる。架橋熱可塑性ポリウレタンが特に好ましい。 The main component of the second coating layer 142 is not particularly limited as long as it is a synthetic resin having excellent flame retardancy and abrasion resistance, and examples thereof include polyurethane. Crosslinked thermoplastic polyurethane is particularly preferred.

第２の被膜層１４２の平均厚みとしては、０．３ｍｍ以上０．７ｍｍ以下が好ましい。 The average thickness of the second coating layer 142 is preferably 0.3 mm or more and 0.7 mm or less.

第１の被膜層１４１の柔軟性が第２の被膜層１４２の柔軟性よりも高いことが好ましい。これは、多芯ケーブルが、第２の被膜層１４２により難燃性および耐摩耗性を確保しながら、優れた柔軟性を得られるからである。第１の被膜層１４１および第２の被膜層１４２は、それぞれ樹脂成分が架橋されていることが好ましい。第１の被膜層１４１および第２の被膜層１４２の架橋方法は、第１の絶縁層１１３の架橋方法と同様とすることができる。 It is preferable that the flexibility of the first coating layer 141 is higher than the flexibility of the second coating layer 142. This is because the multi-core cable can obtain excellent flexibility while ensuring flame retardancy and abrasion resistance by the second coating layer 142. It is preferable that the resin components of the first coating layer 141 and the second coating layer 142 are crosslinked, respectively. The method of cross-linking the first coating layer 141 and the second coating layer 142 can be the same as the method of cross-linking the first insulating layer 113.

また、第１の被膜層１４１および第２の被膜層１４２は、第１の絶縁層１１３で例示した添加剤を含有してもよい。 Further, the first coating layer 141 and the second coating layer 142 may contain the additives exemplified in the first insulating layer 113.

本実施形態の多芯ケーブルは、ここまで説明した複数の電力線や、外周被膜以外に任意の部材をさらに有することもできる。 The multi-core cable of the present embodiment may further have an arbitrary member other than the plurality of power lines described above and the outer peripheral coating.

例えば複数の電力線１１の外周を覆う、抑え巻１５を有していてもよい。抑え巻１５は、複数の電線や、場合によってはさらに被覆電線を撚り合せたコアを覆っている。抑え巻１５を配置することで、コアを構成する複数の電力線１１等の撚り合わされた形状を安定的に維持することができる。抑え巻１５は、外周被膜１４の内側に設けることができる。 For example, it may have a holding winding 15 that covers the outer periphery of a plurality of power lines 11. The restraint winding 15 covers a plurality of electric wires and, in some cases, a core obtained by further twisting a coated electric wire. By arranging the holding winding 15, the twisted shape of the plurality of power lines 11 and the like constituting the core can be stably maintained. The holding roll 15 can be provided inside the outer peripheral coating 14.

抑え巻１５として、例えば、紙テープや不織布、ポリエステルなどの樹脂製のテープを用いることができる。また、抑え巻１５は、コアの長手方向に沿って、螺旋状に巻き付けてもよいし、縦添え、すなわち抑え紙の長手方向をコアの長手方向に沿って配置する構成であっても良い。また、巻き方向は、Ｚ巻きでもＳ巻きでも良い。またコア１３が対撚信号線１２等を含む場合、抑え巻１５の巻き方向は、コア１３に含まれる対撚信号線１２等の対撚り方向と同じ方向に巻いてもよいし、反対方向に巻いてもよい。もっとも、抑え巻１５の巻き方向と対撚信号線１２等の対撚り方向とを反対にすると、抑え巻１５の表面に凹凸が生じにくく、多芯ケーブルの外径形状が安定し易いので好ましい。 As the holding roll 15, for example, a paper tape, a non-woven fabric, or a resin tape such as polyester can be used. Further, the holding roll 15 may be spirally wound along the longitudinal direction of the core, or may be vertically attached, that is, the holding paper may be arranged vertically along the longitudinal direction of the core. Further, the winding direction may be Z winding or S winding. When the core 13 includes the anti-twisted signal wire 12 and the like, the winding direction of the restraint winding 15 may be the same as the anti-twisting direction of the anti-twisted signal wire 12 and the like included in the core 13, or may be wound in the opposite direction. You may roll it. However, it is preferable to reverse the winding direction of the restraint winding 15 and the twisted pair direction of the anti-twisted signal wire 12 or the like because the surface of the restraint winding 15 is less likely to be uneven and the outer diameter shape of the multi-core cable is easily stabilized.

なお、抑え巻１５が、緩衝作用を有し屈曲性を高める機能や、外部からの保護機能を有することから、抑え巻１５を設けた場合には外周被膜１４の層を薄く構成できる。このように抑え巻１５を設けることにより、さらに曲げやすくかつ耐摩耗性に優れた多芯ケーブルを提供できる。 Since the holding roll 15 has a function of enhancing the flexibility by having a buffering action and a function of protecting from the outside, the layer of the outer peripheral coating 14 can be formed thin when the holding roll 15 is provided. By providing the holding winding 15 in this way, it is possible to provide a multi-core cable that is more easily bent and has excellent wear resistance.

また、押出被覆で樹脂製の外周被膜１４等を設ける場合には、該樹脂が複数の被覆電線の間に入り込んでしまい、多芯ケーブルの末端において複数の被覆電線を分離しにくくなる場合がある。そこで、抑え巻１５を設けることにより、該樹脂の複数の被覆電線の間への侵入を防止し、端末において電力線等の複数の被覆電線を取り出しやすくすることができる。 Further, when a resin outer peripheral coating 14 or the like is provided by extrusion coating, the resin may enter between a plurality of coated electric wires, and it may be difficult to separate the plurality of coated electric wires at the end of the multi-core cable. .. Therefore, by providing the holding winding 15, it is possible to prevent the resin from entering between the plurality of coated electric wires, and to make it easier to take out the plurality of coated electric wires such as power lines at the terminal.

また、本実施形態の多芯ケーブルは、例えば外周被膜１４と、コアとの間の領域１６に介在を有していてもよい。介在は、スフ糸やナイロン糸などの繊維で構成することができる。介在は、抗張力繊維で構成してもよい。 Further, the multi-core cable of the present embodiment may have an interposition in a region 16 between the outer peripheral coating 14 and the core, for example. The interposition can be composed of fibers such as rayon and nylon yarn. The interposition may be composed of tensile strength fibers.

介在は、複数の電力線１１間や、電力線１１と信号線１２１との間の様に、被覆電線間に形成される隙間に配置することができる。 The interposition can be arranged in a gap formed between the coated electric wires, such as between a plurality of power lines 11 or between the power line 11 and the signal line 121.

以上、実施形態について詳述したが、特定の実施形態に限定されるものではなく、特許請求の範囲に記載された範囲内において、種々の変形および変更が可能である。 Although the embodiments have been described in detail above, the embodiments are not limited to the specific embodiments, and various modifications and changes can be made within the scope of the claims.

以下に具体的な実施例を挙げて説明するが、本発明はこれらの実施例に限定されるものではない。
（評価方法）
まず、以下の実験例において作製した多芯ケーブルの評価方法について説明する。
（１）第１素線、第２素線の撚りピッチの評価。 Specific examples will be described below, but the present invention is not limited to these examples.
(Evaluation method)
First, an evaluation method of the multi-core cable produced in the following experimental example will be described.
(1) Evaluation of the twist pitch of the first and second strands.

第１素線を撚り合せた第１導体の場合を例に説明すると、まず第１導体の最外層の第１素線の数、すなわち素線数ｎを数える。 Explaining the case of the first conductor in which the first conductors are twisted as an example, first, the number of the first conductors in the outermost layer of the first conductor, that is, the number of strands n is counted.

次いで、第１導体の中心軸に沿って、第１導体に直尺をあてがい、基準とする素線から、（ｎ＋１）番目の素線までの距離を測り取り、係る長さを第１導体における第１素線の撚りピッチとした。 Next, a straightedge is applied to the first conductor along the central axis of the first conductor, the distance from the reference wire to the (n + 1) th wire is measured, and the length is measured in the first conductor. The twist pitch of the first conductor was used.

ここでは、第１導体の場合を例に説明したが、第２導体の第２素線の撚りピッチについても同様にして測定した。
（２）耐屈曲性試験
以下の実験例で得られた多芯ケーブルについて、ＪＩＳ Ｃ ６８５１（２００６）（光ファイバ特性試験方法）に準ずる方法にて耐屈曲性試験を行った。 Here, the case of the first conductor has been described as an example, but the twist pitch of the second wire of the second conductor has also been measured in the same manner.
(2) Bending resistance test The multi-core cable obtained in the following experimental example was subjected to a bending resistance test by a method according to JIS C 6851 (2006) (optical fiber characteristic test method).

具体的には、図５に示すように、水平かつ互いに平行に配置された直径６０ｍｍの２本のマンドレル５１１、５１２の間に、評価を行う多芯ケーブル５２を鉛直方向に配置して挟み、上端を一方のマンドレル５１１の上側に当接するように水平方向に９０°屈曲させた後、他方のマンドレル５１２の上側に当接するように水平方向に９０°屈曲させることを−３０℃の恒温槽内で繰り返した。この繰り返しは、ケーブル中の２本の導体を接続して抵抗値を測定しながら行い、初期抵抗値の１０倍以上まで抵抗が上昇したときの回数（右側に曲げてから、左側に曲げた後、右側に戻ってくるまでを屈曲回数１回とする。）を耐屈曲性試験の指標値とした。なお、耐屈曲性試験の指標値、すなわち屈曲回数が多いほど耐屈曲性に優れることを意味する。 Specifically, as shown in FIG. 5, a multi-core cable 52 for evaluation is arranged vertically and sandwiched between two mandrels 511 and 512 having a diameter of 60 mm arranged horizontally and parallel to each other. Bend the upper end 90 ° horizontally so that it abuts on the upper side of one mandrel 511, and then bend it 90 ° horizontally so that it abuts on the upper side of the other mandrel 512 in a constant temperature bath at -30 ° C. Repeated in. This repetition is performed while connecting two conductors in the cable and measuring the resistance value, and the number of times when the resistance rises to 10 times or more of the initial resistance value (after bending to the right and then to the left). , The number of times of bending is one until it returns to the right side.) Was used as the index value of the bending resistance test. The index value of the bending resistance test, that is, the larger the number of bendings, the better the bending resistance.

指標値が３０００回未満の場合にはＤ、３０００回以上１００００回未満の場合にはＣ、１００００回以上１５０００回未満の場合にはＢ−、１５０００回以上３００００回未満の場合にはＢ、３００００回以上の場合にはＡと評価した。Ａが最も耐屈曲性に優れ、Ｄが最も耐屈曲性が悪く、Ａ、Ｂ、Ｂ−、Ｃ、Ｄの順に耐屈曲性が低下していくことを意味する。Ａ、Ｂ、Ｂ−のいずれかの場合には、十分な耐屈曲性を有する多芯ケーブルと評価できる。
（３）形状安定性試験
以下の実験例で得られた多芯ケーブルについて、形状安定性試験を行った。 D when the index value is less than 3000 times, C when 3000 times or more and less than 10000 times, B- when 10000 times or more and less than 15000 times, B, 30000 times when 15000 times or more and less than 30000 times When it was more than once, it was evaluated as A. It means that A has the highest bending resistance, D has the worst bending resistance, and the bending resistance decreases in the order of A, B, B-, C, and D. In the case of any of A, B, and B-, it can be evaluated as a multi-core cable having sufficient bending resistance.
(3) Shape stability test The shape stability test was performed on the multi-core cable obtained in the following experimental example.

形状安定性試験は、まず以下の実験例で得られた多芯ケーブルの長手方向と垂直な断面において、直交する２方向の直径（外径）を測定した。 In the shape stability test, first, the diameters (outer diameters) in two orthogonal directions were measured in the cross section perpendicular to the longitudinal direction of the multi-core cable obtained in the following experimental example.

そして、測定した２方向の直径のうち、長い方の直径（長径）の、短い方の直径（短径）に対する割合、すなわち、長径／短径×１００が、１００％以上１０５％未満の場合にはＡ、１０５％以上１１０％未満の場合にはＢ、１１０％以上１１５％未満の場合にはＣ、１１５％以上の場合にはＤと評価した。Ａが最も形状安定性に優れ、Ｄが最も形状安定性が悪く、Ａ、Ｂ、Ｃ、Ｄの順に形状安定性が低下していくことを意味する。
（４）生産性評価
１時間当たりの多芯ケーブルの生産量（長さ）について、実験例１の場合を基準として、実験例１の１．２倍未満の場合にはＣ、１．２倍以上１．３５倍未満の場合にはＢ−、１．３５倍以上１．５倍未満の場合にはＢ、１．５倍以上２．０倍未満の場合にはＡ、２．０倍以上の場合にはＡ＋と評価した。Ａ＋が最も生産性が高く、Ｃが最も生産性が低く、Ａ＋、Ａ、Ｂ、Ｂ−、Ｃの順に生産性が低下していくことを意味する。
（実験例）
以下、実験条件について説明する。実験例１〜実験例７が実施例、実験例８が比較例となる。
［実験例１］
図１に示した多芯ケーブル１０を作製し、評価を行った。具体的には、コア１３は、２本の電力線１１と、２本の信号線１２１を含む対撚信号線１２とを含む。 Then, when the ratio of the longer diameter (major axis) to the shorter diameter (minor axis) of the measured diameters in the two directions, that is, the major axis / minor axis × 100 is 100% or more and less than 105%. Was evaluated as A, when it was 105% or more and less than 110%, it was evaluated as B, when it was 110% or more and less than 115%, it was evaluated as C, and when it was 115% or more, it was evaluated as D. It means that A has the highest shape stability, D has the worst shape stability, and the shape stability decreases in the order of A, B, C, and D.
(4) Productivity evaluation Regarding the production amount (length) of the multi-core cable per hour, based on the case of Experimental Example 1, if it is less than 1.2 times that of Experimental Example 1, C, 1.2 times. B- if it is more than 1.35 times and less than 1.35 times, B if it is 1.35 times or more and less than 1.5 times, A if it is 1.5 times or more and less than 2.0 times, 2.0 times or more In the case of, it was evaluated as A +. It means that A + has the highest productivity, C has the lowest productivity, and the productivity decreases in the order of A +, A, B, B-, and C.
(Experimental example)
The experimental conditions will be described below. Experimental Examples 1 to 7 are Examples, and Experimental Example 8 is a Comparative Example.
[Experimental Example 1]
The multi-core cable 10 shown in FIG. 1 was produced and evaluated. Specifically, the core 13 includes two power lines 11 and a twisted signal line 12 including two signal lines 121.

電力線１１は中心に配置された１本の第１導体１１１と、第１導体１１１の外周に配置された６本の第２導体１１２を含む。また、第１導体１１１および第２導体１１２を覆う第１の絶縁層１１３を有している。 The power line 11 includes one first conductor 111 arranged at the center and six second conductors 112 arranged on the outer periphery of the first conductor 111. It also has a first insulating layer 113 that covers the first conductor 111 and the second conductor 112.

第１導体１１１は素線径が０．０８ｍｍの第１素線が４８本、右撚りに撚り合わされて構成されている。第２導体１１２は素線径が０．０８ｍｍの第２素線が４８本、右撚りに撚り合わされて構成されている。 The first conductor 111 is composed of 48 first conductors having a wire diameter of 0.08 mm and twisted in a right-handed manner. The second conductor 112 is composed of 48 second conductors having a wire diameter of 0.08 mm and twisted in a right-handed manner.

第１導体１１１、および第２導体１１２はいずれも、外径が０．６３ｍｍであり、断面積が０．２４ｍｍ２であった。以下の他の実験例でも、第１導体１１１、第２導体の外径、断面積は同じ値となった。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。 Both the first conductor 111 and the second conductor 112 had an outer diameter of 0.63 mm and a cross-sectional area of 0.24 mm 2 . In the other experimental examples below, the outer diameters and cross-sectional areas of the first conductor 111 and the second conductor were the same. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.

電力線１１は、第１導体１１１、および第２導体１１２を右撚りに撚り合せている。 The power line 11 twists the first conductor 111 and the second conductor 112 in a right-handed manner.

対撚信号線１２は、３本の第３導体１２１１を含む２本の信号線１２１を右撚りに撚り合せて構成されている。信号線１２１において、３本の第３導体１２１１は、右撚りに撚り合わせて構成されている。３本の第３導体１２１１は、第２の絶縁層１２１２により覆われている。第３導体１２１１は１６本の素線が撚り合わされて構成されており、第３導体１２１１の外径は１．６ｍｍであり、断面積は０．２５ｍｍ２である。 The anti-twisted signal line 12 is formed by twisting two signal lines 121 including three third conductors 1211 in a right-handed manner. In the signal line 121, the three third conductors 1211 are twisted in a right-handed manner. The three third conductors 1211 are covered with a second insulating layer 1212. The third conductor 1211 is composed of 16 strands twisted together, and the third conductor 1211 has an outer diameter of 1.6 mm and a cross-sectional area of 0.25 mm 2 .

用いた信号線１２１の断面積は、いずれも電力線１１の断面積よりも小さくなっている。以下の他の実験例においても同様であった。 The cross-sectional area of the signal line 121 used is smaller than the cross-sectional area of the power line 11. The same was true for the following other experimental examples.

コア１３は、上述の２本の電力線１１と、対撚信号線１２とが長手方向に沿って右撚りに撚り合せて形成されている。そして、コア１３の周りには、抑え巻１５として薄紙が配置され、コア１３を覆うように外周被膜１４が配置されている。 The core 13 is formed by twisting the above-mentioned two power lines 11 and a twisted signal line 12 in a right-handed manner along the longitudinal direction. A thin paper is arranged around the core 13 as a holding roll 15, and an outer peripheral coating 14 is arranged so as to cover the core 13.

外周被膜１４は、第１の被膜層１４１と、第２の被膜層１４２とを有している。第１の被膜層１４１は、その最小厚みが０．６５ｍｍであり、ポリエチレン樹脂により形成した。第２の被膜層１４２は平均厚みが０．５ｍｍであり、ポリウレタン樹脂により形成した。 The outer peripheral coating 14 has a first coating layer 141 and a second coating layer 142. The first coating layer 141 has a minimum thickness of 0.65 mm and is made of polyethylene resin. The second coating layer 142 had an average thickness of 0.5 mm and was formed of a polyurethane resin.

得られた多芯ケーブルについて、耐屈曲性試験、形状安定性試験、および生産性評価を行った。評価結果を表１に示す。
［実験例２］
第２導体１１２を作製する際に、第２素線の撚りピッチを変更した点以外は、実験例１と同様にして多芯ケーブルを製造し、評価を行った。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。 The obtained multi-core cable was subjected to a bending resistance test, a shape stability test, and a productivity evaluation. The evaluation results are shown in Table 1.
[Experimental Example 2]
A multi-core cable was manufactured and evaluated in the same manner as in Experimental Example 1 except that the twist pitch of the second wire was changed when the second conductor 112 was manufactured. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.

評価結果を表１に示す。
［実験例３］
第１導体１１１、および第２導体１１２を作製する際に、第１素線、第２素線の撚りピッチを変更した点以外は、実験例１と同様にして多芯ケーブルを製造し、評価を行った。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。 The evaluation results are shown in Table 1.
[Experimental Example 3]
A multi-core cable was manufactured and evaluated in the same manner as in Experimental Example 1 except that the twist pitches of the first and second conductors were changed when the first conductor 111 and the second conductor 112 were manufactured. Was done. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.

評価結果を表１に示す。
［実験例４］
第２導体１１２を作製する際に、第２素線の撚りピッチを変更した点以外は、実験例３と同様にして多芯ケーブルを製造し、評価を行った。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。 The evaluation results are shown in Table 1.
[Experimental Example 4]
A multi-core cable was manufactured and evaluated in the same manner as in Experimental Example 3 except that the twist pitch of the second wire was changed when the second conductor 112 was manufactured. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.

評価結果を表１に示す。
［実験例５］
第２導体１１２を作製する際に、第２素線の撚りピッチを変更した点以外は、実験例３と同様にして多芯ケーブルを製造し、評価を行った。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。 The evaluation results are shown in Table 1.
[Experimental Example 5]
A multi-core cable was manufactured and evaluated in the same manner as in Experimental Example 3 except that the twist pitch of the second wire was changed when the second conductor 112 was manufactured. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.

評価結果を表１に示す。
［実験例６］
第１導体１１１、および第２導体１１２を作製する際に、第１素線、第２素線の撚りピッチを変更した点以外は、実験例１と同様にして多芯ケーブルを製造し、評価を行った。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。
［実験例７］
第１導体１１１、および第２導体１１２を作製する際に、第１素線、第２素線の撚りピッチを変更した点以外は、実験例１と同様にして多芯ケーブルを製造し、評価を行った。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。
［実験例８］
第２導体１１２を作製する際に、第２素線を左撚りとした点以外は、実験例５と同様にして多芯ケーブルを製造し、評価を行った。また、第１素線、および第２素線の撚りピッチを測定したところ、表１に示す値であることが確認できた。 The evaluation results are shown in Table 1.
[Experimental Example 6]
A multi-core cable was manufactured and evaluated in the same manner as in Experimental Example 1 except that the twist pitches of the first and second conductors were changed when the first conductor 111 and the second conductor 112 were manufactured. Was done. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.
[Experimental Example 7]
A multi-core cable was manufactured and evaluated in the same manner as in Experimental Example 1 except that the twist pitches of the first and second conductors were changed when the first conductor 111 and the second conductor 112 were manufactured. Was done. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.
[Experimental Example 8]
A multi-core cable was produced and evaluated in the same manner as in Experimental Example 5, except that the second wire was twisted to the left when the second conductor 112 was produced. Further, when the twist pitches of the first wire and the second wire were measured, it was confirmed that the values are shown in Table 1.

評価結果を表１に示す。 The evaluation results are shown in Table 1.

Figure 2021093349


表１に示した結果によれば、第１素線の撚り方向と、第２素線の撚り方向と、第１導体と第２導体との撚り方向と、が同一である実験例１〜実験例７の多芯ケーブルでは耐屈曲性試験の評価結果が、Ａ、Ｂ、Ｂ−のいずれかであり、十分な耐屈曲性を有することを確認できた。
Figure 2021093349

According to the results shown in Table 1, Experimental Examples 1 to 1 in which the twisting direction of the first wire, the twisting direction of the second wire, and the twisting direction of the first conductor and the second conductor are the same. In the multi-core cable of Example 7, the evaluation result of the bending resistance test was any of A, B, and B-, and it was confirmed that the cable had sufficient bending resistance.

特に第１素線の撚りピッチが、第２素線の撚りピッチよりも短い実験例２〜５においては耐屈曲性試験の評価結果がＡであり、特に優れた耐屈曲性を有することを確認できた。 In particular, in Experimental Examples 2 to 5 in which the twist pitch of the first wire is shorter than the twist pitch of the second wire, the evaluation result of the bending resistance test is A, and it is confirmed that the twist resistance is particularly excellent. did it.

一方、第１素線の撚り方向と、第２素線の撚り方向とが異なる実験例８の多芯ケーブルは、耐屈曲性試験の評価結果がＣであり、耐屈曲性が劣っていることを確認できた。 On the other hand, the multi-core cable of Experimental Example 8 in which the twisting direction of the first wire and the twisting direction of the second wire are different, the evaluation result of the bending resistance test is C, and the bending resistance is inferior. I was able to confirm.

１０、２０、３０、５２ 多芯ケーブル
１１ 電力線
１１１ 第１導体
１１２ 第２導体
１１３ 第１の絶縁層
１２ 対撚信号線
１２１ 信号線
１２１１ 第３導体
１２１２ 第２の絶縁層
１３、２３、３３ コア
１４ 外周被膜
１４１ 第１の被膜層
１４２ 第２の被膜層
１５ 抑え巻
１６ 領域
２１ 電線
２１１ 第４導体
２１２ 第３の絶縁層
４１ 第１素線
４２ 第２素線
５１１、５１２ マンドレル 10, 20, 30, 52 Multi-core cable 11 Power line 111 First conductor 112 Second conductor 113 First insulating layer 12 Twisted signal line 121 Signal line 1211 Third conductor 1212 Second insulating layer 13, 23, 33 cores 14 Outer coating 141 First coating layer 142 Second coating layer 15 Retaining winding 16 Region 21 Electric wire 211 Fourth conductor 212 Third insulating layer 41 First wire 42 Second wire 511, 512 Mandrel

Claims (7)

複数の電力線と、複数の前記電力線を覆う外周被膜とを備え、
前記電力線は、中心に配置された１本の第１導体と、前記第１導体の外周に配置された複数の第２導体とが撚り合わされており、
前記第１導体は、１０本以上１００本以下の第１素線が撚り合わされ、
前記第２導体は、１０本以上１００本以下の第２素線が撚り合わされ、
前記第１導体における前記第１素線の撚り方向と、前記第２導体における前記第２素線の撚り方向と、前記電力線における前記第１導体と前記第２導体との撚り方向と、が同一であり、
前記第１素線の撚りピッチ、および前記第２素線の撚りピッチは、８ｍｍ以上２２ｍｍ以下である多芯ケーブル。 A plurality of power lines and an outer peripheral coating covering the plurality of power lines are provided.
In the power line, one first conductor arranged at the center and a plurality of second conductors arranged on the outer periphery of the first conductor are twisted together.
In the first conductor, 10 or more and 100 or less first strands are twisted together.
In the second conductor, 10 or more and 100 or less second wires are twisted together.
The twisting direction of the first wire in the first conductor, the twisting direction of the second wire in the second conductor, and the twisting direction of the first conductor and the second conductor in the power line are the same. And
A multi-core cable in which the twist pitch of the first wire and the twist pitch of the second wire are 8 mm or more and 22 mm or less. 前記第１素線の撚りピッチは、前記第２素線の撚りピッチよりも短い請求項１に記載の多芯ケーブル。 The multi-core cable according to claim 1, wherein the twist pitch of the first wire is shorter than the twist pitch of the second wire. 前記第１素線の撚りピッチ、および前記第２素線の撚りピッチは、１０ｍｍ以上１４ｍｍ以下である請求項１または請求項２に記載の多芯ケーブル。 The multi-core cable according to claim 1 or 2, wherein the twist pitch of the first wire and the twist pitch of the second wire are 10 mm or more and 14 mm or less. 前記第２素線の撚りピッチは、前記第１素線の撚りピッチの、１．１倍以上１．４倍以下である請求項１から請求項３のいずれか１項に記載の多芯ケーブル。 The multi-core cable according to any one of claims 1 to 3, wherein the twist pitch of the second wire is 1.1 times or more and 1.4 times or less the twist pitch of the first wire. .. 複数の前記電力線は撚り合わされており、
複数の前記電力線の撚り方向が、前記第１導体における前記第１素線の撚り方向と、前記第２導体における前記第２素線の撚り方向と、前記電力線における前記第１導体と前記第２導体との撚り方向と、同一である請求項１から請求項４のいずれか１項に記載の多芯ケーブル。 The plurality of power lines are twisted together and
The twisting directions of the plurality of power lines are the twisting direction of the first wire in the first conductor, the twisting direction of the second wire in the second conductor, and the first conductor and the second wire in the power line. The multi-core cable according to any one of claims 1 to 4, which has the same twisting direction as the conductor. 前記電力線よりも断面積の小さい２本の信号線を撚り合せた対撚信号線をさらに有し、
前記信号線は、複数の第３導体が撚り合わされ、
前記信号線における前記第３導体の撚り方向と、前記対撚信号線における前記信号線の撚り方向とが同一である請求項１から請求項５のいずれか１項に記載の多芯ケーブル。 It further has a paired signal line obtained by twisting two signal lines having a cross-sectional area smaller than that of the power line.
A plurality of third conductors are twisted together in the signal line.
The multi-core cable according to any one of claims 1 to 5, wherein the twisting direction of the third conductor in the signal line and the twisting direction of the signal line in the paired signal line are the same. 前記電力線よりも断面積の小さい２本の信号線を撚り合わた対撚信号線をさらに有し、
前記信号線は、複数の第３導体が撚り合わされ、
前記信号線における前記第３導体の撚り方向と、前記対撚信号線における前記信号線の撚り方向とが同一であり、
前記対撚信号線と、複数の前記電力線とが撚り合わされており、
前記対撚信号線と複数の前記電力線との撚り方向と、前記対撚信号線における前記信号線の撚り方向とが同一である請求項１から請求項５のいずれか１項に記載の多芯ケーブル。 It further has a paired signal line obtained by twisting two signal lines having a cross-sectional area smaller than that of the power line.
A plurality of third conductors are twisted together in the signal line.
The twisting direction of the third conductor in the signal line and the twisting direction of the signal line in the paired signal line are the same.
The anti-twisted signal line and the plurality of the power lines are twisted together.
The multi-core according to any one of claims 1 to 5, wherein the twisting direction of the paired signal line and the plurality of power lines is the same as the twisting direction of the signal line in the twisted signal line. cable.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016212965A (en) * 2015-04-30 2016-12-15 矢崎総業株式会社 Bending resistant electric wire and wire harness
JP2018060794A (en) * 2016-10-05 2018-04-12 矢崎総業株式会社 Composite stranded wire conductor and insulated wire provided therewith
JP2018078007A (en) * 2016-11-09 2018-05-17 矢崎総業株式会社 Aluminum twisted-wire and wire harness
JP2019102268A (en) * 2017-12-01 2019-06-24 住友電気工業株式会社 Multicore cable
JP2019179594A (en) * 2018-03-30 2019-10-17 株式会社フジクラ cable
JP2019185981A (en) * 2018-04-06 2019-10-24 株式会社オートネットワーク技術研究所 Insulated wire

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016212965A (en) * 2015-04-30 2016-12-15 矢崎総業株式会社 Bending resistant electric wire and wire harness
JP2018060794A (en) * 2016-10-05 2018-04-12 矢崎総業株式会社 Composite stranded wire conductor and insulated wire provided therewith
JP2018078007A (en) * 2016-11-09 2018-05-17 矢崎総業株式会社 Aluminum twisted-wire and wire harness
JP2019102268A (en) * 2017-12-01 2019-06-24 住友電気工業株式会社 Multicore cable
JP2019179594A (en) * 2018-03-30 2019-10-17 株式会社フジクラ cable
JP2019185981A (en) * 2018-04-06 2019-10-24 株式会社オートネットワーク技術研究所 Insulated wire

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