JP7265324B2 - insulated wire, cable - Google Patents

insulated wire, cable Download PDF

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Publication number
JP7265324B2
JP7265324B2 JP2018144443A JP2018144443A JP7265324B2 JP 7265324 B2 JP7265324 B2 JP 7265324B2 JP 2018144443 A JP2018144443 A JP 2018144443A JP 2018144443 A JP2018144443 A JP 2018144443A JP 7265324 B2 JP7265324 B2 JP 7265324B2
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wire
clad
diameter
central conductor
cable
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JP2020021620A (en
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基 松田
仁 遠藤
千華 伊藤
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0045—Cable-harnesses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/221—Longitudinally placed metal wires or tapes
    • H01B7/223—Longitudinally placed metal wires or tapes forming part of a high tensile strength core

Description

本発明は、絶縁電線、ケーブルに関し、詳細には、中心導体と、中心導体の周囲を被覆した樹脂材料による絶縁体とからなる絶縁電線、ケーブルに関する。 TECHNICAL FIELD The present invention relates to an insulated wire and cable, and more particularly to an insulated wire and cable comprising a central conductor and an insulator made of a resin material covering the periphery of the central conductor.

ワイヤーハーネスは、車両内に配策されており、電気導電性の良さから銅電線を使用することが多い。また、軽量化や金属資源のリサイクルのためにアルミニウム電線を使用することもあるが、アルミニウム電線は銅電線よりも強度面で劣る。このため、例えば、特許文献１には、中心部がアルミニウム線で、その外周表面に銅クラッド層を形成した構造（銅被覆アルミニウム素線ともいう）が開示されている。 Wire harnesses are routed in vehicles, and copper wires are often used because of their good electrical conductivity. Aluminum wires are sometimes used to reduce weight and recycle metal resources, but aluminum wires are inferior to copper wires in terms of strength. For this reason, for example, Patent Literature 1 discloses a structure (also referred to as a copper-coated aluminum wire) in which the central portion is an aluminum wire and a copper clad layer is formed on the outer peripheral surface of the wire.

特開２００９－１５２１４１号公報JP 2009-152141 A

しかしながら、例えばＦＡ産業設備用の電線、ロボット用の電線、民生機器の可動部の電線、自動車用の電線などの屈曲部分に使用するケーブルには、断線しにくさ（高屈曲性）を備えることが望ましい。 However, for example, wires for FA industrial equipment, wires for robots, wires for moving parts of consumer equipment, wires for automobiles, etc., which are used for bending parts, must be difficult to break (high flexibility). is desirable.

本発明は、上述のような実情に鑑みてなされたもので、実用的で高屈曲性を有した絶縁電線、ケーブルを提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide an insulated wire or cable that is practical and highly flexible.

本発明の一態様に係る絶縁電線は、中心導体と、該中心導体の周囲を被覆した樹脂材料による絶縁体とからなる絶縁電線であって、前記中心導体が、銅の外層と鋼の芯材とからなるクラッド線材を複数本撚り合わせた撚り線で形成されており、前記クラッド線材の電気導電率が２０（ＩＡＣＳ％）～８０（ＩＡＣＳ％）の範囲であり、かつ、前記クラッド線材の径が、０．０２（ｍｍ）～０．０６（ｍｍ）の範囲であり、前記中心導体の導体断面積が０．００４（ｍｍ２）～０．６（ｍｍ２）の範囲であり、前記クラッド線材の撚りピッチが、前記中心導体の径の３０倍以下であり、前記芯材の径が、前記クラッド線材の径の６０（％）～９０（％）の範囲であり、前記外層がメッキによって形成される。 An insulated wire according to an aspect of the present invention is an insulated wire comprising a central conductor and an insulator made of a resin material covering the periphery of the central conductor, wherein the central conductor comprises an outer layer of copper and a core of steel. The electric conductivity of the clad wire is in the range of 20 (IACS%) to 80 (IACS%), and the diameter of the clad wire is in the range of 0.02 (mm) to 0.06 (mm), the conductor cross-sectional area of the central conductor is in the range of 0.004 (mm 2 ) to 0.6 (mm 2 ), and the clad The twist pitch of the wire is 30 times or less the diameter of the central conductor, the diameter of the core is in the range of 60(%) to 90(%) of the diameter of the clad wire, and the outer layer is plated. formed by

上記によれば、実用的で高屈曲性を有した絶縁電線、ケーブルを提供することができる。 According to the above, it is possible to provide an insulated wire or cable that is practical and highly flexible.

本発明の第１実施形態に係る絶縁電線を有したケーブルの斜視図である。1 is a perspective view of a cable having an insulated wire according to a first embodiment of the invention; FIG. 図１の中心導体を構成するクラッド線材の断面図である。2 is a cross-sectional view of a clad wire constituting the central conductor of FIG. 1; FIG. 本発明の第２実施形態に係る絶縁電線の斜視図である。FIG. 5 is a perspective view of an insulated wire according to a second embodiment of the present invention; （Ａ）は本発明の第３実施形態に係るケーブルの斜視図、（Ｂ）は（Ａ）のシールド部を構成するクラッド線材の断面図である。(A) is a perspective view of a cable according to a third embodiment of the present invention, and (B) is a cross-sectional view of a clad wire constituting the shield portion of (A). 本発明の第４実施形態に係るケーブルの斜視図である。FIG. 11 is a perspective view of a cable according to a fourth embodiment of the invention;

［本発明の実施形態の説明］
最初に本発明の実施形態の内容を列記して説明する。
本発明の一態様に係る絶縁電線は、（１）中心導体と、該中心導体の周囲を被覆した樹脂材料による絶縁体とからなる絶縁電線であって、前記中心導体が、銅の外層と鋼の芯材とからなるクラッド線材を複数本撚り合わせた撚り線で形成されており、前記クラッド線材の電気導電率が２０（ＩＡＣＳ％）～８０（ＩＡＣＳ％）の範囲であり、かつ、前記クラッド線材の径が、０．０２（ｍｍ）～０．０６（ｍｍ）の範囲であり、前記中心導体の導体断面積が０．００４（ｍｍ２）～０．６（ｍｍ２）の範囲であり、前記クラッド線材の撚りピッチが、前記中心導体の径の３０倍以下であり、前記芯材の径が、前記クラッド線材の径の６０（％）～９０（％）の範囲であり、前記外層がメッキによって形成される。
中心導体を撚り線で形成すれば、単線と比べて可撓性が優れ、断線しにくくなる。この撚り線構造の絶縁電線において、クラッド線材の電気導電率が２０（ＩＡＣＳ％）より小さいと電線として実用的でなく、８０（ＩＡＣＳ％）を超えると外層である銅の割合が増えるため屈曲性が低下する。よって、クラッド線材の電気導電率を２０（ＩＡＣＳ％）～８０（ＩＡＣＳ％）にすれば、高屈曲性を得ることが可能になる。そして、クラッド線材の径が０．０２（ｍｍ）未満では、製造しにくくなるので実用的ではないが、クラッド線材の径が０．０６（ｍｍ）を超えると、クラッド線材を曲げた場合に、曲げの外側に生ずる引張ひずみと内側に生ずる圧縮ひずみの差が大きくなるため、可撓性が低下する。よって、クラッド線材の径が０．０２（ｍｍ）～０．０６（ｍｍ）の範囲であれば、実用的で高屈曲性を有した絶縁電線を提供することができる。
また、本発明の絶縁電線の一態様では、前記中心導体の導体断面積が０．００４（ｍｍ２）～０．６（ｍｍ２）の範囲である。中心導体の導体断面積を０．００４（ｍｍ２）～０．６（ｍｍ２）にすれば、ＦＡ産業設備用の電線、ロボット用の電線、民生機器の可動部の電線、自動車用の電線などの屈曲部分に用いることができる。
また、本発明の絶縁電線の一態様では、前記クラッド線材の撚りピッチが、前記中心導体の径の３０倍以下である。クラッド線材は素線硬度が大きいことから、クラッド線材の撚りピッチを中心導体の径の３０倍以下にすれば、撚りピッチが長くならずに済み、撚り線浮きが生じない。 [Description of the embodiment of the present invention]
First, the contents of the embodiments of the present invention will be listed and explained.
An insulated wire according to an aspect of the present invention is (1) an insulated wire comprising a central conductor and an insulator made of a resin material covering the periphery of the central conductor, wherein the central conductor comprises an outer layer of copper and a steel The clad wire is formed of a stranded wire in which a plurality of clad wires are twisted together, and the electric conductivity of the clad wire is in the range of 20 (IACS%) to 80 (IACS%), and the clad The diameter of the wire is in the range of 0.02 (mm) to 0.06 (mm), and the conductor cross-sectional area of the central conductor is in the range of 0.004 (mm 2 ) to 0.6 (mm 2 ). , the twist pitch of the clad wire is 30 times or less the diameter of the central conductor, the diameter of the core material is in the range of 60 (%) to 90 (%) of the diameter of the clad wire, An outer layer is formed by plating .
If the central conductor is formed of a twisted wire, it is more flexible than a single wire and is less likely to break. In the insulated wire of this stranded wire structure, if the electric conductivity of the clad wire is less than 20 (IACS%), it is not practical as an electric wire, and if it exceeds 80 (IACS%), the ratio of copper, which is the outer layer, increases, resulting in flexibility. decreases. Therefore, by setting the electric conductivity of the clad wire to 20 (IACS%) to 80 (IACS%), it is possible to obtain high flexibility. If the diameter of the clad wire is less than 0.02 (mm), it is not practical because it is difficult to manufacture. Flexibility is reduced because the difference between tensile strain on the outside and compressive strain on the inside increases. Therefore, if the diameter of the clad wire is in the range of 0.02 (mm) to 0.06 (mm), it is possible to provide a practical and highly flexible insulated wire.
In one aspect of the insulated wire of the present invention, the conductor cross-sectional area of the central conductor is in the range of 0.004 (mm 2 ) to 0.6 (mm 2 ). If the conductor cross-sectional area of the central conductor is set to 0.004 (mm 2 ) to 0.6 (mm 2 ), it can be used as a wire for FA industrial equipment, a wire for robots, a wire for moving parts of consumer equipment, and a wire for automobiles. It can be used for bending parts such as
Moreover, in one aspect of the insulated wire of the present invention, the twist pitch of the clad wire material is 30 times or less the diameter of the central conductor. Since the clad wire has a high wire hardness, if the twist pitch of the clad wire is set to 30 times or less the diameter of the central conductor, the twist pitch will not be long and the twist wire will not float.

また、本発明の絶縁電線の一態様では、前記芯材の径が、前記クラッド線材の径の６０（％）～９０（％）の範囲である。芯材の径をクラッド線材の径の６０（％）～９０（％）にすれば、低速信号線用途で可動する配線として用いることができる。
また、本発明の絶縁電線の一態様では、前記外層がメッキによって形成される。銅の外層を、圧着で形成する場合に比べて容易に形成できる。 In one aspect of the insulated wire of the present invention, the diameter of the core material is in the range of 60(%) to 90(%) of the diameter of the clad wire material. If the diameter of the core material is set to 60(%) to 90(%) of the diameter of the clad wire material, it can be used as a movable wiring for low-speed signal line applications.
Moreover, in one aspect of the insulated wire of the present invention, the outer layer is formed by plating. The outer layer of copper can be formed more easily than when it is formed by crimping.

また、本発明の実施形態として、次の（２）～（７）の態様も記載されている。
（２）本発明の一態様に係るケーブルは、中心導体、絶縁体、シールド部および外被を配したケーブルであって、前記シールド部が、銅の外層と鋼の芯材とからなるクラッド線材で形成されている。シールド部を銅覆鋼線で形成すれば、高屈曲性を得ることが可能になる。
（３）本発明のケーブルの一態様では、前記芯材の径が、前記クラッド線材の径の６０（％）～９０（％）の範囲である。芯材の径をクラッド線材の径の６０（％）～９０（％）にすれば、低速信号線用途の可動する配線として用いることができる。
（４）本発明のケーブルの一態様では、前記外層がメッキによって形成される。銅の外層を、圧着で形成する場合に比べて容易に形成できる。
（５）本発明のケーブルの一態様では、前記クラッド線材の径が、０．０２（ｍｍ）～０．０６（ｍｍ）の範囲である。クラッド線材の径が０．０２（ｍｍ）～０．０６（ｍｍ）の範囲であれば、実用的で高屈曲性を有したシールドケーブルを提供することができる。 The following aspects (2) to (7) are also described as embodiments of the present invention.
(2) A cable according to an aspect of the present invention is a cable having a central conductor, an insulator, a shield and a jacket, wherein the shield is a clad wire consisting of an outer layer of copper and a core of steel. is formed by If the shield part is made of a copper-clad steel wire, it becomes possible to obtain high flexibility.
(3) In one aspect of the cable of the present invention, the diameter of the core material is in the range of 60(%) to 90(%) of the diameter of the clad wire. If the diameter of the core material is 60(%) to 90(%) of the diameter of the clad wire material, it can be used as a movable wiring for low-speed signal line applications.
(4) In one aspect of the cable of the present invention, the outer layer is formed by plating. The outer layer of copper can be formed more easily than when it is formed by crimping.
(5) In one aspect of the cable of the present invention, the diameter of the clad wire is in the range of 0.02 (mm) to 0.06 (mm). If the diameter of the clad wire is in the range of 0.02 (mm) to 0.06 (mm), it is possible to provide a practical and highly flexible shielded cable.

（６）本発明のケーブルの一態様では、前記シールド部が、前記複数本のクラッド線材を並列に配して螺旋状に巻かれている。シールド部を横巻き構造にすれば、編組構造に比べてシールド部を作りやすくなる。
（７）本発明のケーブルの一態様では、前記シールド部は、前記複数本のクラッド線材が編組されている。シールド部を編組構造にすれば、信号漏洩や外部電波の侵入を容易に防止できる。
 (6) In one aspect of the cable of the present invention, the shield part has the plurality of clad wires arranged in parallel and wound spirally. If the shield part has a horizontally wound structure, it becomes easier to form the shield part than with a braided structure.
(7) In one aspect of the cable of the present invention, the plurality of clad wires are braided into the shield portion. A braided structure for the shield can easily prevent signal leakage and external radio waves from entering.

［本発明の実施形態の詳細］
以下、添付図面を参照しながら、本発明に係る絶縁電線、ケーブルの具体例について説明する。図１は、本発明の第１実施形態に係る絶縁電線を有したケーブルの斜視図であり、図２は、図１の中心導体を構成するクラッド線材の断面図である。 [Details of the embodiment of the present invention]
Hereinafter, specific examples of the insulated wire and cable according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a cable having an insulated wire according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of a clad wire forming the central conductor of FIG.

図１に示したケーブル１はセンサーケーブルであり、信号線となる２心の絶縁電線４と、絶縁電線４の周囲を被覆する外被（シースともいう）６とから構成されており、２芯楕円の断面構造で形成されている。
絶縁電線４は、ノイズの影響を受けにくくするために、２本の絶縁電線４を撚った対撚り線とすることができる。絶縁電線４は、中心導体２と、中心導体２の周囲を被覆した樹脂材料による絶縁体３とからなる。 The cable 1 shown in FIG. 1 is a sensor cable, and is composed of a two-core insulated wire 4 that serves as a signal line and an outer covering (also referred to as a sheath) 6 that covers the periphery of the insulated wire 4. It is formed with an elliptical cross-sectional structure.
The insulated wire 4 can be a twisted pair wire in which two insulated wires 4 are twisted in order to reduce the influence of noise. The insulated wire 4 is composed of a central conductor 2 and an insulator 3 made of a resin material covering the circumference of the central conductor 2 .

中心導体２は、例えば１８本のクラッド線材２ａを撚り合わせた撚り線で形成されている。中心導体を撚り線で形成すれば、単線と比べて可撓性が優れ、断線しにくくなる。
中心導体２として、導体断面積が０．００４（ｍｍ2）～０．６（ｍｍ2）程度で、ＡＷＧ（American Wire Gauge）の＃２０～＃４０に相当する導線を用いている。中心導体２の線材には、図２に示すように、銅の外層２ｃと鋼の芯材２ｂとからなるクラッド線材２ａ（銅覆鋼線、ＣＣＳ（Copper Clad Steel）線ともいう）が用いられている。 The central conductor 2 is formed of a twisted wire in which, for example, 18 clad wires 2a are twisted together. If the central conductor is formed of a twisted wire, it is more flexible than a single wire and is less likely to break.
As the central conductor 2, a conductive wire having a conductor cross-sectional area of about 0.004 (mm 2 ) to 0.6 (mm 2 ) and corresponding to AWG (American Wire Gauge) #20 to #40 is used. As shown in FIG. 2, a clad wire 2a (also referred to as CCS (Copper Clad Steel) wire) composed of a copper outer layer 2c and a steel core 2b is used as the wire of the central conductor 2. ing.

ＣＣＳ線は、ＡＳＴＭ規格のＢ２２７－９８に規定する引っ張り強さ（８８３（ＭＰａ）以上）を有するものである。芯材２ｂの炭素含有率は０．８（％）～０．８５（％）であり、クラッド線材２ａの電気導電率は、２０（ＩＡＣＳ（International Annealed Copper Standard）％）～８０（ＩＡＣＳ％）の範囲内に設定されている。
クラッド線材２ａの電気導電率が８０（ＩＡＣＳ％）を超えると、強度が低下して断線しやすくなる。一方、クラッド線材２ａの電気導電率が２０（ＩＡＣＳ％）未満では、信号線として実用的ではない。このため、クラッド線材２ａの電気導電率を２０（ＩＡＣＳ％）～８０（ＩＡＣＳ％）にすれば、高屈曲性を得ることが可能になる。 The CCS wire has a tensile strength (883 (MPa) or more) specified in ASTM standard B227-98. The carbon content of the core material 2b is 0.8(%) to 0.85(%), and the electrical conductivity of the clad wire 2a is 20 (International Annealed Copper Standard (IACS) %) to 80 (IACS%). is set within the range of
If the electric conductivity of the clad wire 2a exceeds 80 (IACS%), the strength is lowered and the wire is likely to break. On the other hand, if the electric conductivity of the clad wire 2a is less than 20 (IACS%), it is not practical as a signal line. Therefore, by setting the electric conductivity of the clad wire 2a to 20 (IACS%) to 80 (IACS%), it is possible to obtain high flexibility.

クラッド線材２ａの外径は０．０２（ｍｍ）～０．０６（ｍｍ）の範囲内であり、好ましくは０．０５（ｍｍ）である。外径０．０５（ｍｍ）のクラッド線材２ａを１８本撚った場合には、断面積０．０３（ｍｍ2）、外径０．２５（ｍｍ）の中心導体２が形成される。
クラッド線材２ａの径が０．０２（ｍｍ）未満では、クラッド線材２ａを曲げても、曲げの外側に生ずる引張ひずみと内側に生ずる圧縮ひずみの差が小さいため、可撓性は良好であるが、製造しにくくなるので実用的ではない。一方、クラッド線材２ａの径が０．０６（ｍｍ）を超えると、クラッド線材２ａを曲げた場合に、曲げの外側に生ずる引張ひずみと内側に生ずる圧縮ひずみの差が大きくなるため、可撓性が低下する。よって、クラッド線材の径が０．０２（ｍｍ）～０．０６（ｍｍ）の範囲であれば、実用的で高屈曲性を有した絶縁電線４を提供することができる。 The outer diameter of the clad wire 2a is within the range of 0.02 (mm) to 0.06 (mm), preferably 0.05 (mm). When 18 clad wires 2a with an outer diameter of 0.05 (mm) are twisted, a central conductor 2 with a cross-sectional area of 0.03 (mm 2 ) and an outer diameter of 0.25 (mm) is formed.
If the diameter of the clad wire 2a is less than 0.02 (mm), even if the clad wire 2a is bent, the difference between the tensile strain occurring on the outer side of the bending and the compressive strain occurring on the inner side is small, so the flexibility is good. , is not practical because it becomes difficult to manufacture. On the other hand, when the diameter of the clad wire 2a exceeds 0.06 (mm), when the clad wire 2a is bent, the difference between the tensile strain occurring on the outer side and the compressive strain occurring on the inner side becomes large. decreases. Therefore, if the diameter of the clad wire is in the range of 0.02 (mm) to 0.06 (mm), it is possible to provide an insulated wire 4 that is practical and has high flexibility.

なお、クラッド線材２ａの撚りピッチは、中心導体２の外径の例えば３０倍以下に設定されている。また、芯材２ｂの外径は、クラッド線材２ａの外径の６０（％）～９０（％）の範囲内、言い換えれば、外層２ｃの厚みがクラッド線材２ａの外径の５（％）～２０（％）の範囲内に設定される。外層２ｃは、芯材２ｂの外周に例えばメッキによって形成されているが、メッキに変えて圧着で形成してもよい。 The twist pitch of the clad wire 2a is set to be, for example, 30 times or less the outer diameter of the central conductor 2. As shown in FIG. The outer diameter of the core material 2b is in the range of 60(%) to 90(%) of the outer diameter of the clad wire 2a. It is set within the range of 20(%). The outer layer 2c is formed on the outer periphery of the core material 2b by, for example, plating, but may be formed by crimping instead of plating.

絶縁体３には、例えば架橋したポリ塩化ビニル（ＰＶＣ）樹脂が用いられ、外径が例えば０．０５（ｍｍ）に成形される。架橋ＰＶＣにより、対半田特性、耐熱性があるケーブルとなる。
外被６には、例えば耐熱性のＰＶＣ樹脂が用いられており、２本の絶縁電線４の周囲を覆っている。耐熱性のＰＶＣ樹脂により耐熱性と同時に耐油性のあるケーブルとなる。 The insulator 3 is made of, for example, a crosslinked polyvinyl chloride (PVC) resin, and is molded to have an outer diameter of, for example, 0.05 (mm). The cross-linked PVC provides a cable with good solderability and heat resistance.
The jacket 6 is made of, for example, a heat-resistant PVC resin and covers the two insulated wires 4 . The heat-resistant PVC resin makes the cable both heat-resistant and oil-resistant.

次に、絶縁電線４の試験結果を説明する。中心導体にＣＣＳ線を用いた絶縁電線４（試料１）と、中心導体に錫入銅合金線を用いた絶縁電線（試料２）について、マンドレルを用いた屈曲試験を行った。
具体的には、試料１と試料２は中心導体２の材質が異なるが、その他は同じ構成であり、試料１および試料２のいずれも、中心導体２は、外径０．０５（ｍｍ）の導線を１８本撚って外径０．２５（ｍｍ）とし、絶縁体３は、架橋ＰＶＣを用いて外径０．５０（ｍｍ）とし、外被６はＰＶＣ樹脂で押出し成形し、短径が１．０（ｍｍ）、長径が２．０（ｍｍ）である。 Next, test results of the insulated wire 4 will be described. A bending test using a mandrel was performed on an insulated wire 4 (sample 1) using a CCS wire as the central conductor and an insulated wire (sample 2) using a tin-containing copper alloy wire as the central conductor.
Specifically, Sample 1 and Sample 2 have different materials for the central conductor 2, but otherwise have the same configuration. 18 conductor wires are twisted to have an outer diameter of 0.25 (mm), the insulator 3 is made of crosslinked PVC to have an outer diameter of 0.50 (mm), and the jacket 6 is extruded from PVC resin and has a minor diameter of is 1.0 (mm), and the major axis is 2.0 (mm).

そして、絶縁電線４の両側はマンドレル（半径＝８（ｍｍ））で挟み付けられ、絶縁電線４の一端には荷重（１００ｇ）がかけられている。この絶縁電線４の他端を絶縁電線４の長手方向を基準にして例えば９０°ずつ屈曲させた。絶縁電線４の断線が確認されるまで屈曲を続けたところ、試料２は１０（万回）であったのに対し、試料１は１５（万回）であった。
次いで、径の異なるマンドレル（半径＝２０（ｍｍ））を準備し、同じく絶縁電線４の断線が確認されるまで屈曲を続けたところ、試料２は４０（万回）であったのに対し、試料１は２９０（万回）に達していた。ＦＡ産業設備用の電線などの屈曲部分に相当するような、マンドレルが比較的大径の場合には、試料１の耐屈曲性が試料２よりも７倍程度向上していた。 Both sides of the insulated wire 4 are sandwiched between mandrels (radius=8 (mm)), and a load (100 g) is applied to one end of the insulated wire 4 . The other end of the insulated wire 4 is bent by, for example, 90° with respect to the longitudinal direction of the insulated wire 4 . When the bending was continued until disconnection of the insulated wire 4 was confirmed, the sample 2 was 10 (thousand times), while the sample 1 was 15 (thousand times).
Next, mandrels with different diameters (radius = 20 (mm)) were prepared, and bending was continued until disconnection of the insulated wire 4 was confirmed. Sample 1 reached 2.90 (million times). When the mandrel has a relatively large diameter, which corresponds to the bending portion of electric wires for FA industrial equipment, the flex resistance of Sample 1 is improved by about 7 times that of Sample 2.

続いて、ケーブル１についてもマンドレルを用いて屈曲試験を行った。詳しくは、試料１の絶縁電線４を２本収容したケーブル１（試料３）と、試料２の絶縁電線を２本収容したケーブル１（試料４）を準備した。
ケーブル１の両側はマンドレル（半径＝１０（ｍｍ））で挟み付けられ、ケーブル１の一端には荷重（２００ｇ）がかけられている。このケーブル１の他端をケーブル１の長手方向を基準にして例えば９０°ずつ屈曲させた。ケーブル１の断線が確認されるまで屈曲を続けたところ、試料４は２５（千回）であったのに対し、試料３は５０（千回）であった。 Subsequently, the cable 1 was also subjected to a bending test using a mandrel. Specifically, a cable 1 (sample 3) containing two insulated wires 4 of sample 1 and a cable 1 (sample 4) containing two insulated wires of sample 2 were prepared.
Both sides of the cable 1 are sandwiched between mandrels (radius=10 (mm)), and a load (200 g) is applied to one end of the cable 1 . The other end of the cable 1 is bent by, for example, 90 degrees with respect to the longitudinal direction of the cable 1 . When the bending was continued until disconnection of the cable 1 was confirmed, the sample 4 was 25 (thousand times), while the sample 3 was 50 (thousand times).

次いて、径の異なるマンドレル（半径＝１２．５（ｍｍ））を準備し、同じくケーブル１の断線が確認されるまで屈曲を続けたところ、試料４は５０（千回）であったのに対し、試料１は２４７（千回）に達していた。ケーブル１についても、マンドレルが比較的大径の場合には、試料３の耐屈曲性が試料４よりも５倍程度向上していた。 Next, mandrels with different diameters (radius = 12.5 (mm)) were prepared, and bending was continued until disconnection of the cable 1 was confirmed. On the other hand, sample 1 reached 247 (thousand times). As for Cable 1, when the mandrel had a relatively large diameter, the bending resistance of Sample 3 was about five times higher than that of Sample 4.

上記実施形態では、中心導体２を撚り線で形成した例を挙げて説明したが、図３に示すように、単線のクラッド線材２ａのみで中心導体２を形成することも可能である。単線の場合は、撚り線に比べて導体断面積を同じにすると、線径が多少細くなり、より細径化することができ、また、コネクタ等の接点部に半田付けしやすいという利点がある。 In the above-described embodiment, an example in which the central conductor 2 is formed of twisted wires has been described, but as shown in FIG. In the case of a single wire, compared to a stranded wire, if the cross-sectional area of the conductor is the same, the wire diameter is slightly thinner, and the diameter can be made even thinner. .

また、上述したＣＣＳ線は、中心導体２のみならず、シールド部（シールド導体ともいう）に用いることもできる。
図４，５に示したケーブル１はシールドケーブルであり、例えば接触して並べた２本の絶縁電線４の外側にシールド部５を配しており、その外側を外被６で被覆して構成されている。なお、図示の中心導体２は、図１で説明した撚り線であっても、図３で説明した単線であってもよい。 Moreover, the CCS wire described above can be used not only for the central conductor 2 but also for the shield portion (also referred to as the shield conductor).
The cable 1 shown in FIGS. 4 and 5 is a shielded cable. For example, two insulated wires 4 arranged in contact with each other are provided with a shielding portion 5 on the outside, and the outside thereof is covered with a jacket 6. It is The illustrated central conductor 2 may be the stranded wire described in FIG. 1 or the single wire described in FIG.

シールド部５は、図４（Ａ）に示すように、複数本のクラッド線材５ａを並列に配して螺旋状に巻かれており（横巻き構造ともいう）、２本の絶縁電線４を一括してシールドしている。
図４（Ｂ）に示すように、シールド部５の線材には、銅の外層５ｃと鋼の芯材５ｂとからなるクラッド線材５ａが用いられている。 As shown in FIG. 4(A), the shield part 5 has a plurality of clad wires 5a arranged in parallel and spirally wound (also referred to as a horizontal winding structure). and have a shield.
As shown in FIG. 4B, a clad wire 5a composed of a copper outer layer 5c and a steel core 5b is used as the wire of the shield portion 5. As shown in FIG.

なお、クラッド線材５ａは、図２等で説明したクラッド線材２ａと同じ構造であり、クラッド線材５ａの外径が０．０２（ｍｍ）～０．０６（ｍｍ）の範囲内に設定され、芯材５ｂの外径がクラッド線材５ａの外径の６０（％）～９０（％）の範囲内に設定されている。また、外層５ｃも例えばメッキで形成される。
あるいは、シールド部５は、図５に示すように、複数本のクラッド線材５ａが編組された編組構造であってもよい。このクラッド線材５ａも、図４（Ｂ）で説明した構造と同様に、銅の外層５ｃと鋼の芯材５ｂとから構成される。 The clad wire 5a has the same structure as the clad wire 2a described in FIG. The outer diameter of the material 5b is set within the range of 60(%) to 90(%) of the outer diameter of the clad wire 5a. The outer layer 5c is also formed by plating, for example.
Alternatively, the shield part 5 may have a braided structure in which a plurality of clad wires 5a are braided, as shown in FIG. This clad wire 5a is also composed of an outer layer 5c of copper and a core material 5b of steel in the same manner as the structure described in FIG. 4(B).

今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した意味ではなく、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。 It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the meaning described above, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

１…ケーブル、２…中心導体、２ａ，５ａ…クラッド線材、２ｂ，５ｂ…芯材、２ｃ，５ｃ…外層、３…絶縁体、４…絶縁電線、５…シールド部、６…外被。 DESCRIPTION OF SYMBOLS 1... Cable, 2... Center conductor, 2a, 5a... Clad wire, 2b, 5b... Core material, 2c, 5c... Outer layer, 3... Insulator, 4... Insulated wire, 5... Shield part, 6... Jacket.

Claims (1)

中心導体と、該中心導体の周囲を被覆した樹脂材料による絶縁体とからなる絶縁電線であって、
前記中心導体が、銅の外層と鋼の芯材とからなるクラッド線材を複数本撚り合わせた撚り線で形成されており、
前記クラッド線材の電気導電率が２０（ＩＡＣＳ％）～８０（ＩＡＣＳ％）の範囲であり、かつ、前記クラッド線材の径が、０．０２（ｍｍ）～０．０６（ｍｍ）の範囲であり、
前記中心導体の導体断面積が０．００４（ｍｍ２）～０．６（ｍｍ２）の範囲であり、
前記クラッド線材の撚りピッチが、前記中心導体の径の３０倍以下であり、
前記芯材の径が、前記クラッド線材の径の６０（％）～９０（％）の範囲であり、
前記外層がメッキによって形成される、絶縁電線。 An insulated wire comprising a central conductor and an insulator made of a resin material covering the circumference of the central conductor,
The central conductor is formed of a stranded wire obtained by twisting a plurality of clad wires each having a copper outer layer and a steel core material,
The electric conductivity of the clad wire is in the range of 20 (IACS%) to 80 (IACS%), and the diameter of the clad wire is in the range of 0.02 (mm) to 0.06 (mm). ,
The conductor cross-sectional area of the central conductor is in the range of 0.004 (mm 2 ) to 0.6 (mm 2 ),
A twist pitch of the clad wire is 30 times or less the diameter of the central conductor,
The diameter of the core material is in the range of 60 (%) to 90 (%) of the diameter of the clad wire,
An insulated wire , wherein the outer layer is formed by plating .
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