JP2018206527A - Multicore cable - Google Patents

Multicore cable Download PDF

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JP2018206527A
JP2018206527A JP2017107826A JP2017107826A JP2018206527A JP 2018206527 A JP2018206527 A JP 2018206527A JP 2017107826 A JP2017107826 A JP 2017107826A JP 2017107826 A JP2017107826 A JP 2017107826A JP 2018206527 A JP2018206527 A JP 2018206527A
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wire
insulated wire
insulated
twisted
wires
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JP6979796B2 (en
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孝哉 小堀
Takaya Kobori
孝哉 小堀
石川　雅之
Masayuki Ishikawa
石川　　雅之
基 松田
Motoi Matsuda
基 松田
達則 林下
Tatsunori Rinka
達則 林下
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Sumitomo Electric Industries Ltd
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Abstract

To provide a multicore cable excellent in flexibility having a shield effect that suppresses noise contamination to a pair twist insulated wire from other insulated wires.SOLUTION: A multicore cable 1 includes three or more insulated wires having conductors 21 (31) and insulation layers 22 (32) enclosing the conductors 21 (31). Among three or more insulated wires 2A, 2B, 3A, 3B, there is included a pair twist insulated wire 20 formed by twisting two insulated wires 2A, 2B. The pair twist insulated wire 20 is enclosed by a metal braid cover 10 of which the element wires are twisted. The pair twist insulated wire 20 enclosed by the metal braid cover 10 and other insulated wires 3A, 3B are enclosed by an outer shell 6.SELECTED DRAWING: Figure 1

Description

本発明は、多芯ケーブルに関する。   The present invention relates to a multicore cable.

特許文献１には、細径ケーブルが複数本集合され、これらの細径ケーブルの周囲に樹脂テープとシールド層と外被とが被せられた多芯ケーブルが開示されている。特許文献２には、複数本のコア材（絶縁電線）によって構成されるコア電線を有し、２本のコア材からなるサブユニット（対撚絶縁電線）と他のコア材（絶縁電線）とが撚り合わされて前記コア電線が形成されている電気絶縁ケーブル（多芯ケーブル）が開示されている。   Patent Document 1 discloses a multi-core cable in which a plurality of small-diameter cables are gathered and a resin tape, a shield layer, and a jacket are covered around these thin-diameter cables. Patent Document 2 includes a core wire composed of a plurality of core materials (insulated wires), a subunit (counter-twisted insulated wire) composed of two core materials, and another core material (insulated wires) An electrically insulated cable (multi-core cable) in which the core electric wires are formed by twisting together is disclosed.

特開２０１６−２１４１５号公報JP, 2006-21415, A 特開２０１４−２２００４３号公報JP 2014-220043 A

特許文献２に開示された多芯ケーブルは、例えば対撚絶縁電線に対して、他の絶縁電線からのノイズが混入するおそれがある。   The multi-core cable disclosed in Patent Literature 2 may be mixed with noise from other insulated wires, for example, with respect to the twisted insulated wires.

そこで、本発明は、対撚絶縁電線に他の絶縁電線からのノイズが混入することを抑制するシールド効果が得られると共に、耐屈曲性に優れた多芯ケーブルを提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-core cable that has a shielding effect that suppresses the mixing of noise from other insulated wires into a twisted insulated wire and that has excellent bending resistance.

本発明の一態様に係る多芯ケーブルは、導体と前記導体を覆う絶縁層とを有する絶縁電線を三本以上備え、
前記三本以上の絶縁電線は、二本の前記絶縁電線が撚り合わされた対撚絶縁電線を含み、
前記対撚絶縁電線は、金属編組で覆われており、
前記金属編組の素線が撚り線であり、前記金属編組で覆われた前記対撚絶縁電線と他の絶縁電線とが外被で覆われている。 The multi-core cable according to one aspect of the present invention includes three or more insulated wires having a conductor and an insulating layer covering the conductor,
The three or more insulated wires include a twisted insulated wire in which two insulated wires are twisted together,
The twisted insulated wire is covered with a metal braid,
The strand of the metal braid is a stranded wire, and the twisted insulated wire covered with the metal braid and another insulated wire are covered with a jacket.

上記発明によれば、対撚絶縁電線に他の絶縁電線からのノイズが混入することを抑制するシールド効果が得られると共に、耐屈曲性に優れた多芯ケーブルを提供することができる。   According to the said invention, while being able to obtain the shielding effect which suppresses that the noise from another insulated wire mixes in a twisted insulated wire, the multi-core cable excellent in bending resistance can be provided.

本発明に係る多芯ケーブルの構成を示す断面図である。It is sectional drawing which shows the structure of the multicore cable which concerns on this invention.

（本発明の実施形態の説明）
最初に本発明の実施態様を列記して説明する。
本発明の一態様に係る多芯ケーブルは、
（１）導体と前記導体を覆う絶縁層とを有する絶縁電線を三本以上備え、
前記三本以上の絶縁電線は、二本の前記絶縁電線が撚り合わされた対撚絶縁電線を含み、
前記対撚絶縁電線は、金属編組で覆われており、
前記金属編組の素線が撚り線であり、前記金属編組で覆われた前記対撚絶縁電線と他の絶縁電線とが外被で覆われている。
上記構成によれば、対撚絶縁電線が金属編組で覆われているので、この金属編組が電磁気的なシールドとして機能し、他の絶縁電線からのノイズが対撚絶縁電線に混入することを抑制するシールド効果が得られる。また、前記金属編組の素線が撚り線であるので、この多芯ケーブルは耐屈曲性に優れている。 (Description of Embodiment of the Present Invention)
First, embodiments of the present invention will be listed and described.
The multi-core cable according to one aspect of the present invention is:
(1) comprising three or more insulated wires having a conductor and an insulating layer covering the conductor;
The three or more insulated wires include a twisted insulated wire in which two insulated wires are twisted together,
The twisted insulated wire is covered with a metal braid,
The strand of the metal braid is a stranded wire, and the twisted insulated wire covered with the metal braid and another insulated wire are covered with a jacket.
According to the above configuration, since the twisted insulated wire is covered with the metal braid, the metal braid functions as an electromagnetic shield and suppresses noise from other insulated wires from being mixed into the twisted insulated wire. Shield effect is obtained. Moreover, since the strand of the metal braid is a stranded wire, this multi-core cable is excellent in bending resistance.

（２）前記金属編組の外径が前記対撚電線以外の絶縁電線の外径の０．８倍以上１．５倍以下であってもよい。
上記構成によれば、多芯ケーブルの断面を真円に近くすることができて好ましい。 (2) The outer diameter of the metal braid may be not less than 0.8 times and not more than 1.5 times the outer diameter of an insulated wire other than the anti-twisted wire.
According to the said structure, the cross section of a multi-core cable can be made close to a perfect circle, and it is preferable.

（３）前記三本以上の絶縁電線が一つのシールド層で覆われており、前記シールド層は前記外被の内側にあってもよい。
上記構成によれば、絶縁電線がシールド層で覆われているので、ケーブル外部からのノイズが絶縁電線に混入することを抑制するシールド効果が得られる。 (3) The three or more insulated wires may be covered with one shield layer, and the shield layer may be inside the outer jacket.
According to the said structure, since the insulated wire is covered with the shield layer, the shielding effect which suppresses that the noise from the cable exterior mixes in an insulated wire is acquired.

（本発明の実施形態の詳細）
本発明の実施形態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すべての変更が含まれることが意図される。 (Details of the embodiment of the present invention)
Specific examples of the multicore cable according to the embodiment of the present invention will be described below with reference to the drawings.
In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

本実施形態に係る多芯ケーブルの一例を図１に示す。   An example of the multicore cable according to this embodiment is shown in FIG.

図１に示すように、多芯ケーブル１は、三本以上の複数（本例では四本）の絶縁電線２Ａ，２Ｂ，３Ａ，３Ｂと、これらの線材の外周側に設けられたシールド層５と、シールド層５の外周側に設けられた外被６とを備えている。なお、本例では四本の絶縁電線を、第一絶縁電線２Ａ、第二絶縁電線２Ｂ、第三絶縁電線３Ａ、第四絶縁電線３Ｂと称する。   As shown in FIG. 1, a multi-core cable 1 includes three or more (four in this example) insulated wires 2A, 2B, 3A, 3B and a shield layer 5 provided on the outer peripheral side of these wires. And a jacket 6 provided on the outer peripheral side of the shield layer 5. In this example, the four insulated wires are referred to as a first insulated wire 2A, a second insulated wire 2B, a third insulated wire 3A, and a fourth insulated wire 3B.

第一絶縁電線２Ａ、第二絶縁電線２Ｂは、それぞれ導体２１と導体２１の外周を覆うように形成された絶縁層２２とにより構成されている。第一絶縁電線２Ａと第二絶縁電線２Ｂとは、略同一の構造を有する絶縁電線である。第一絶縁電線２Ａと第二絶縁電線２Ｂとは、互いに撚り合わされて対撚絶縁電線２０として構成されている。   The first insulated wire 2A and the second insulated wire 2B are configured by a conductor 21 and an insulating layer 22 formed so as to cover the outer periphery of the conductor 21, respectively. The first insulated wire 2A and the second insulated wire 2B are insulated wires having substantially the same structure. The first insulated wire 2 </ b> A and the second insulated wire 2 </ b> B are twisted together to form a twisted insulated wire 20.

導体２１は、例えば銅合金線であり、例えば外径０．０８ｍｍの素線が複数本撚り合わされた撚線として形成されている。導体２１を構成する素線の本数は、５０本以上７０本以下程度である。このように構成された導体２１の断面積は、０．１８ｍｍ２以上０．４０ｍｍ２以下程度となるように設定される。また、導体２１の外径は、０．６ｍｍ以上１．０ｍｍ以下程度となるように設定される。なお、導体２１は、銅合金線に限られず、錫めっき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あればよい。 The conductor 21 is, for example, a copper alloy wire, and is formed, for example, as a stranded wire in which a plurality of strands having an outer diameter of 0.08 mm are twisted together. The number of strands constituting the conductor 21 is about 50 or more and 70 or less. The cross-sectional area of the configured conductor 21 as is set such that the degree 0.18 mm 2 or more 0.40 mm 2 or less. Further, the outer diameter of the conductor 21 is set to be about 0.6 mm or more and 1.0 mm or less. The conductor 21 is not limited to a copper alloy wire, but may be a material having predetermined conductivity and flexibility such as a tin-plated annealed copper wire.

絶縁層２２は、例えば難燃性の架橋ポリオレフィン系樹脂で形成されている。絶縁層２２の厚さは、０．２ｍｍ以上０．４ｍｍ以下程度とされている。絶縁層２２の外径は、１．２ｍｍ以上２．２ｍｍ以下程度となるように設定される。なお、絶縁層２２は、架橋フッ素系樹脂等の他の材料で形成してもよい。   The insulating layer 22 is made of, for example, a flame retardant crosslinked polyolefin resin. The thickness of the insulating layer 22 is about 0.2 mm or more and 0.4 mm or less. The outer diameter of the insulating layer 22 is set to be about 1.2 mm or more and 2.2 mm or less. The insulating layer 22 may be formed of other materials such as a cross-linked fluorine resin.

対撚絶縁電線２０は、その外周側が金属編組１０によって覆われている。金属編組１０は、例えば銀メッキ銅銀合金線の素線が複数本撚り合わされた撚線を複数本用いて編組したものである。金属編組１０の外径は、例えば２．８ｍｍ以上４．８ｍｍ以下程度とされている。撚線は、二本もしくは三本の素線を撚り合わせて形成されることが好ましい。素線の外径は、従来の多芯ケーブルのシールド層に用いられる素線（素線径：０．１２ｍｍ）よりも細い、例えば０．０５ｍｍ以下であることが好ましい。また、素線は、その撚りピッチが撚線の外径の２０倍以上５０倍以下となるように撚り合わされている。撚りピッチとは、撚線の軸の周囲を素線が一周する間にその軸方向に進む距離のことを示す。撚線の外径は、複数本の素線が撚り合わされたときの外径を示す。金属編組１０は、対撚絶縁電線２０の外周面に接触した状態で設けられている。   The outer peripheral side of the twisted insulated wire 20 is covered with the metal braid 10. The metal braid 10 is braided using, for example, a plurality of stranded wires in which a plurality of strands of silver-plated copper-silver alloy wires are twisted together. The outer diameter of the metal braid 10 is, for example, about 2.8 mm or more and 4.8 mm or less. The stranded wire is preferably formed by twisting two or three strands. The outer diameter of the strand is preferably thinner than the strand used for the shield layer of the conventional multicore cable (strand diameter: 0.12 mm), for example, 0.05 mm or less. Moreover, the strand is twisted so that the twist pitch may be 20 times or more and 50 times or less of the outer diameter of the twisted wire. The twist pitch indicates a distance traveled in the axial direction while the wire goes around the axis of the twisted wire. The outer diameter of the stranded wire indicates the outer diameter when a plurality of strands are twisted together. The metal braid 10 is provided in contact with the outer peripheral surface of the twisted insulated electric wire 20.

第三絶縁電線３Ａ、第四絶縁電線３Ｂは、導体３１と導体３１の外周を覆うように形成された絶縁層３２とで構成されている。第三絶縁電線３Ａと第四絶縁電線３Ｂとは、略同一の構造を有する絶縁電線である。なお、上記各絶縁電線の導体は単線構造であってもよい。   The 3rd insulated wire 3A and the 4th insulated wire 3B are comprised by the insulating layer 32 formed so that the outer periphery of the conductor 31 and the conductor 31 might be covered. The third insulated wire 3A and the fourth insulated wire 3B are insulated wires having substantially the same structure. In addition, the conductor of each said insulated wire may have a single wire structure.

導体３１は、例えば銅合金線である。導体３１は、撚線または撚撚線であることが好ましい。図１では、７本の子撚導体（これ自体が複数本の電線が撚り合わされた撚線）が寄せ集められて構成されその合計断面積は、１．４ｍｍ２以上３．２ｍｍ２以下程度となるように設定される。また、導体３１は、銅合金線に限られず、錫めっき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あればよい。また、導体３１の各々は、例えば外径０．０８ｍｍの素線が４０本以上９０本以下程度撚り合わされた撚線として形成されていてもよい。 The conductor 31 is a copper alloy wire, for example. The conductor 31 is preferably a stranded wire or a stranded stranded wire. In FIG. 1, seven child twisted conductors (twisted wires in which a plurality of electric wires are twisted together) are gathered together, and the total cross-sectional area is about 1.4 mm 2 or more and 3.2 mm 2 or less. Is set to be The conductor 31 is not limited to a copper alloy wire, and may be a material having predetermined conductivity and flexibility such as a tin-plated annealed copper wire. Each of the conductors 31 may be formed as a stranded wire in which, for example, about 40 to 90 strands of an outer diameter of 0.08 mm are twisted together.

絶縁層３２は、例えば難燃性の架橋ポリオレフィン系樹脂で形成されている。絶縁層３２の厚さは、０．２ｍｍ以上０．８ｍｍ以下程度とされている。絶縁層３２の外径は、２．５ｍｍ以上４．０ｍｍ以下程度となるように設定される。なお、絶縁層３２は、架橋フッ素系樹脂等の他の材料で形成してもよい。   The insulating layer 32 is made of, for example, a flame retardant crosslinked polyolefin resin. The thickness of the insulating layer 32 is about 0.2 mm or more and 0.8 mm or less. The outer diameter of the insulating layer 32 is set to be about 2.5 mm or more and 4.0 mm or less. The insulating layer 32 may be formed of other materials such as a cross-linked fluorine resin.

対撚絶縁電線２０を覆う金属編組の外径は、第三絶縁電線３Ａの外径、あるいは第四絶縁電線３Ｂの外径と略同じまたは金属編組がやや大きくなる大きさ（１．０倍以上１．４倍以下）となるように構成すると多芯ケーブルの断面を真円に近くすることができて好ましい。   The outer diameter of the metal braid covering the twisted insulated wire 20 is substantially the same as the outer diameter of the third insulated wire 3A or the fourth insulated wire 3B, or a size that makes the metal braid slightly larger (1.0 times or more). If it is configured to be 1.4 times or less, the cross section of the multicore cable can be made close to a perfect circle, which is preferable.

シールド層５は、金属編組１０で覆われた第一絶縁電線２Ａおよび第二絶縁電線２Ｂと、第三絶縁電線３Ａ，第四絶縁電線３Ｂとを外周側から覆うように設けられている。シールド層５は、例えば金属樹脂テープで構成されており、一つに寄せ集められた上記線材の外周に螺旋状に巻き付けられている。金属樹脂テープには例えば銅箔やアルミ箔が樹脂テープに貼り合わされたものや金属層が樹脂テープに蒸着されたものが使用されている。なお、シールド層５には、上記金属編組１０と同様に、撚線を複数本用いて編組したもの、金属樹脂テープと金属編組を組み合わせたものを使用してもよい。   The shield layer 5 is provided so as to cover the first insulated wire 2A and the second insulated wire 2B covered with the metal braid 10 and the third insulated wire 3A and the fourth insulated wire 3B from the outer peripheral side. The shield layer 5 is made of, for example, a metal resin tape, and is spirally wound around the outer periphery of the wire rods gathered together. As the metal resin tape, for example, a copper tape or aluminum foil bonded to the resin tape or a metal layer deposited on the resin tape is used. For the shield layer 5, similarly to the metal braid 10, a braid using a plurality of stranded wires or a combination of a metal resin tape and a metal braid may be used.

外被６は、シールド層５の外周側を覆うように、シールド層５の外周に押出被覆によって形成されている。外被６は、例えば難燃性の架橋ポリウレタンで形成されている。外被６の厚さは、０．３ｍｍ以上０．７ｍｍ以下程度となるように設定される。外被６の外径、すなわち多芯ケーブル１の外径は、６ｍｍ以上１２ｍｍ以下程度となるように設定される。   The jacket 6 is formed by extrusion coating on the outer periphery of the shield layer 5 so as to cover the outer peripheral side of the shield layer 5. The jacket 6 is made of, for example, a flame-retardant crosslinked polyurethane. The thickness of the jacket 6 is set to be about 0.3 mm or more and 0.7 mm or less. The outer diameter of the jacket 6, that is, the outer diameter of the multicore cable 1 is set to be about 6 mm to 12 mm.

なお、金属編組１０で覆われた対撚絶縁電線２０と第三絶縁電線３Ａと第四絶縁電線３Ｂとは、シールド層５の内側において、例えば寄せ集められて多芯ケーブル１の長さ方向に沿って並列に配置されていてもよいし、あるいは互いに撚り合わされていてもよい。   The twisted pair insulated wire 20, the third insulated wire 3 </ b> A, and the fourth insulated wire 3 </ b> B covered with the metal braid 10 are gathered, for example, in the length direction of the multicore cable 1 inside the shield layer 5. They may be arranged in parallel along, or may be twisted together.

このような構成の多芯ケーブル１によれば、第一絶縁電線２Ａと第二絶縁電線２Ｂとが撚り合わされた対撚絶縁電線２０が、金属素線の撚線が編組された金属編組１０によって覆われている。このため、金属編組１０が電磁気的なシールドとして機能し、他の絶縁電線（第三絶縁電線３Ａ，第四絶縁電線３Ｂ）からのノイズが対撚絶縁電線２０に混入することを防ぐことができ、高いシールド効果を得ることができる。   According to the multi-core cable 1 having such a configuration, the twisted pair of insulated wires 20 in which the first insulated wire 2A and the second insulated wire 2B are twisted together are formed by the metal braid 10 in which the strands of the metal strands are braided. Covered. For this reason, the metal braid 10 functions as an electromagnetic shield, and noise from other insulated wires (the third insulated wire 3A and the fourth insulated wire 3B) can be prevented from being mixed into the anti-twist insulated wire 20. High shielding effect can be obtained.

ところで、対撚絶縁電線２０が例えば信号線として用いられ、第三絶縁電線３Ａと第四絶縁電線３Ｂとが例えば電源線として用いられるような場合、第三絶縁電線３Ａおよび第四絶縁電線３Ｂから対撚絶縁電線２０へのノイズの混入が特に問題となりやすい。これに対して、上記のように対撚絶縁電線２０を金属編組１０で覆うことにより、第三絶縁電線３Ａおよび第四絶縁電線３Ｂから対撚絶縁電線２０への電源ノイズの混入を防止することができる。   By the way, when the twisted insulated wire 20 is used as, for example, a signal line and the third insulated wire 3A and the fourth insulated wire 3B are used as, for example, power supply wires, the third insulated wire 3A and the fourth insulated wire 3B The mixing of noise into the twisted insulated wire 20 is particularly problematic. On the other hand, by covering the anti-twisted insulated wire 20 with the metal braid 10 as described above, mixing of power supply noise from the third insulated wire 3A and the fourth insulated wire 3B to the anti-twisted insulated wire 20 is prevented. Can do.

また、対撚絶縁電線２０を覆う金属編組１０が金属素線の撚線を編組することによって形成されているため、金属編組１０の断線を抑制することができ、屈曲や捻回に対する高い耐久性を得ることができる。   Moreover, since the metal braid 10 covering the twisted insulated wire 20 is formed by braiding a twisted wire of a metal strand, the disconnection of the metal braid 10 can be suppressed, and high durability against bending and twisting Can be obtained.

また、対撚絶縁電線２０の外周を覆う金属編組１０は、対撚絶縁電線２０に接触した状態で設けられているので、さらにシールド効果を向上させることができる。   Moreover, since the metal braid 10 covering the outer periphery of the twisted pair insulated wire 20 is provided in a state in contact with the twisted insulated wire 20, the shielding effect can be further improved.

また、第一絶縁電線，第二絶縁電線２Ｂ，第三絶縁電線３Ａ，第四絶縁電線３Ｂが一つのシールド層５で覆われている。このため、多芯ケーブル１の外部からのノイズが上記各絶縁電線に混入することを抑制するシールド効果が得られる。   The first insulated wire, the second insulated wire 2B, the third insulated wire 3A, and the fourth insulated wire 3B are covered with one shield layer 5. For this reason, the shielding effect which suppresses that the noise from the outside of the multicore cable 1 mixes in each said insulated wire is acquired.

下記実施例および比較例の多芯ケーブルを作製し、シールド試験と繰り返し曲げ試験とを行った。   The multicore cables of the following examples and comparative examples were produced, and a shield test and a repeated bending test were performed.

（実施例）
多芯ケーブルとして各部が以下のような構成のケーブルを作製した。対撚絶縁電線（信号線用）２０を構成する各導体２１の材料を銅合金線（外径０．０８ｍｍの素線が６０本撚り合わされて形成された撚撚線）とし、その断面積（素線の合計断面積）を０．３ｍｍ２とし、その外径を０．８ｍｍに設定した。導体２１の周囲に形成される絶縁層２２の材料を架橋難燃ポリエチレン樹脂とし、その厚さを０．３ｍｍとし、その外径を１．４ｍｍに設定した。また、金属編組１０は、外径０．０５ｍｍの銀メッキ銅銀合金線（素線）が二本撚り合わされた撚線を用いて編組し、金属編組の外径を３．２ｍｍに設定した。また、第三絶縁電線３Ａ（電源線用）および第四絶縁電線（電源線用）３Ｂをそれぞれ構成する導体の材料（素線）を錫めっき軟銅線とし、導体は撚撚線としてその断面積を２．８ｍｍ２に設定した。導体３１の周囲に形成される絶縁層３２の材料を架橋難燃ポリエチレン樹脂とし、その厚さを０．４ｍｍとし、その外径を３．０ｍｍに設定した。また、金属編組１０で覆われた対撚絶縁電線２０の本数を一本とし、電源線用の絶縁電線（第三絶縁電線３Ａ，第四絶縁電線３Ｂ）の本数を二本とし、これら三本を撚り合わせた。また、シールド層５の構成としては、０．０５ｍｍの径の金属線を編組したものを用い、シールド外径を６．５ｍｍに設定した。また、外被６の材料を難燃性の架橋ポリウレタンとし、その厚さを０．４５ｍｍとし、その外径を７．４ｍｍに設定した。 (Example)
As a multi-core cable, a cable having the following configuration was produced. The material of each conductor 21 constituting the twisted insulated electric wire (for signal line) 20 is a copper alloy wire (twisted stranded wire formed by twisting 60 strands having an outer diameter of 0.08 mm), and its cross-sectional area ( the total cross-sectional area) of the strand and 0.3 mm 2, and set its outer diameter to 0.8 mm. The material of the insulating layer 22 formed around the conductor 21 was a cross-linked flame retardant polyethylene resin, the thickness was set to 0.3 mm, and the outer diameter was set to 1.4 mm. The metal braid 10 was braided using a twisted wire in which two silver-plated copper-silver alloy wires (element wires) having an outer diameter of 0.05 mm were twisted, and the outer diameter of the metal braid was set to 3.2 mm. Further, the conductor material (element wire) constituting the third insulated wire 3A (for power line) and the fourth insulated wire (for power line) 3B is tinned annealed copper wire, and the conductor is a twisted stranded wire. Was set to 2.8 mm 2 . The material of the insulating layer 32 formed around the conductor 31 was a cross-linked flame-retardant polyethylene resin, the thickness was 0.4 mm, and the outer diameter was set to 3.0 mm. Moreover, the number of the pair twist insulated wires 20 covered with the metal braid 10 is one, and the number of the insulated wires for the power supply wires (the third insulated wires 3A and the fourth insulated wires 3B) is two, and these three Were twisted together. Moreover, as a structure of the shield layer 5, what braided the metal wire of a diameter of 0.05 mm was used, and the shield outer diameter was set to 6.5 mm. Moreover, the material of the jacket 6 was made of flame retardant crosslinked polyurethane, the thickness thereof was set to 0.45 mm, and the outer diameter thereof was set to 7.4 mm.

（比較例）
比較例の多芯ケーブルは、対撚電線を覆う金属編組が単線の素線（外径０．０５ｍｍ）で編組されている。この点が、素線を撚り合わせた撚線で編組されている上記実施例の多芯ケーブルと相違する。その他の構成は、上記実施例の多芯ケーブルと同様である。 (Comparative example)
In the multi-core cable of the comparative example, the metal braid covering the twisted electric wire is braided with a single wire (outer diameter 0.05 mm). This point is different from the multi-core cable of the above-described embodiment that is braided with a twisted wire in which strands are twisted together. Other configurations are the same as those of the multicore cable of the above embodiment.

（繰り返し曲げ試験）
ＩＳＯ １４５７２：２０１１（Ｅ）５．９に規定される繰り返し曲げ試験に従ってセンサ線部分の耐屈曲性を評価した。この繰り返し曲げ試験においては、多芯ケーブルに−９０°から＋９０°となるような曲げを繰り返し作用させた。０°（直線状態）→９０°→−９０°（最初と逆向きに９０°）→直線状態を１回と数える。２万回曲げた後、目視して金属編組が少しでも切れていなければ合格とした。
上記実施例に係る多芯ケーブルは、２万回曲げた後に金属編組に切れがなく合格であった。
一方、上記比較例に係る多芯ケーブルは、２万回曲げた後に金属編組に切れが生じ不合格であった。 (Repeated bending test)
The bending resistance of the sensor wire portion was evaluated in accordance with the repeated bending test specified in ISO 14572: 2011 (E) 5.9. In this repeated bending test, the multicore cable was repeatedly subjected to bending so as to be −90 ° to + 90 °. 0 ° (straight state) → 90 ° → −90 ° (90 ° in the opposite direction to the initial direction) → The straight state is counted as one time. After bending 20,000 times, if the metal braid was not cut even by visual inspection, it was judged as acceptable.
The multi-core cable according to the above example passed the metal braid without bending after being bent 20,000 times.
On the other hand, the multi-core cable according to the comparative example was rejected because the metal braid was cut after being bent 20,000 times.

以上、本発明を詳細にまた特定の実施態様を参照して説明したが、本発明の精神と範囲を逸脱することなく様々な変更や修正を加えることができることは当業者にとって明らかである。また、上記説明した構成部材の数、位置、形状等は上記実施の形態に限定されず、本発明を実施する上で好適な数、位置、形状等に変更することができる。   While the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. In addition, the number, position, shape, and the like of the constituent members described above are not limited to the above-described embodiments, and can be changed to a number, position, shape, and the like that are suitable for carrying out the present invention.

１：多芯ケーブル
２Ａ：第一絶縁電線
２Ｂ：第二絶縁電線
３Ａ：第三絶縁電線
３Ｂ：第四絶縁電線
５：シールド層
６：外被
１０：金属編組
２０：対撚絶縁電線
２１：導体
２２：絶縁層
３１：導体
３２：絶縁層 1: multicore cable 2A: first insulated wire 2B: second insulated wire 3A: third insulated wire 3B: fourth insulated wire 5: shield layer 6: jacket 10: metal braid 20: twisted insulated wire 21: conductor 22: Insulating layer 31: Conductor 32: Insulating layer

Claims (3)

導体と前記導体を覆う絶縁層とを有する絶縁電線を三本以上備え、
前記三本以上の絶縁電線は、二本の前記絶縁電線が撚り合わされた対撚絶縁電線を含み、
前記対撚絶縁電線は、金属編組で覆われており、
前記金属編組の素線が撚り線であり、前記金属編組で覆われた前記対撚絶縁電線と他の絶縁電線とが外被で覆われている、多芯ケーブル。 Comprising three or more insulated wires having a conductor and an insulating layer covering the conductor;
The three or more insulated wires include a twisted insulated wire in which two insulated wires are twisted together,
The twisted insulated wire is covered with a metal braid,
The multi-core cable, wherein the strand of the metal braid is a stranded wire, and the pair-twist insulated wire covered with the metal braid and another insulated wire are covered with a jacket. 前記金属編組の外径が前記対撚電線以外の絶縁電線の外径の０．８倍以上１．５倍以下である、請求項１に記載の多芯ケーブル。   The multi-core cable according to claim 1, wherein an outer diameter of the metal braid is 0.8 times or more and 1.5 times or less of an outer diameter of an insulated wire other than the twisted pair. 前記三本以上の絶縁電線が一つのシールド層で覆われており、前記シールド層は前記外被の内側にある、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 three or more insulated wires are covered with a single shield layer, and the shield layer is inside the jacket.
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JP2014175070A (en) * 2013-03-06 2014-09-22 Hitachi Metals Ltd Cable provided with braided shield
JP2015069726A (en) * 2013-09-26 2015-04-13 日立金属株式会社 Electric cable
JP2016021415A (en) * 2015-10-02 2016-02-04 住友電気工業株式会社 Multicore cable and production method thereof

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JP2015069726A (en) * 2013-09-26 2015-04-13 日立金属株式会社 Electric cable
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