JP2006092933A - Strand and flexible cable using it - Google Patents

Strand and flexible cable using it Download PDF

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JP2006092933A
JP2006092933A JP2004277561A JP2004277561A JP2006092933A JP 2006092933 A JP2006092933 A JP 2006092933A JP 2004277561 A JP2004277561 A JP 2004277561A JP 2004277561 A JP2004277561 A JP 2004277561A JP 2006092933 A JP2006092933 A JP 2006092933A
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wire
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stranded wire
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JP4639723B2 (en
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Hirohisa Endo
裕寿 遠藤
Masayoshi Aoyama
正義 青山
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Hitachi Cable Ltd
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Hitachi Cable Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a stranded wire having good flexibility without being affected by tensile strength of a conductor strand, and a flexible cable. <P>SOLUTION: This stranded wire 10 has a stranded wire layer 12 formed by stranding strands around a center conductor 11, and conductor strands 13 and highly strong conductor strands 14 having tensile strength stronger than that of the conductor strand 13 are used and stranded to form the stranded wire layer 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、電源・電力用や信号伝送用の耐屈曲ケーブルに関するものである。   The present invention relates to a bending-resistant cable for power supply / power and signal transmission.

従来の一般的なケーブルは、中心導体の周りに、導体素線を撚り合わせてなる撚線層を有する。ここで、導体素線の撚り合わせ方により、集合撚り線と同心撚り線とがある。   A conventional general cable has a stranded wire layer formed by twisting conductor wires around a central conductor. Here, depending on how the conductor strands are twisted, there are aggregate strands and concentric strands.

図１０に示すように、複数本（図１０中では７本）の素線からなる中心導体１０１及び複数本（図１０中では５４本）の導体素線１０３をまとめて撚り合わせたものが集合撚り線１００であり、３層構造の撚線層１０２を有する。また、図１１に示すように、複数本（図１１中では７本）の素線からなる中心導体１０１の周りに、複数本（図１１中では５４本）の導体素線１０３を層状に、かつ、同心状に撚り合わせたものが同心撚り線１１０であり、３層構造の撚線層１１２を有する。各撚線１００，１１０は、その周りに、用途又は必要性に応じて絶縁被覆層１０５を有していてもよい。また、中心導体の構成素線及び導体素線１０３としては、一般的に、導電性の高い銅線が用いられる。   As shown in FIG. 10, a central conductor 101 composed of a plurality of wires (seven in FIG. 10) and a plurality of conductor wires 103 (54 in FIG. 10) are gathered together and assembled. The stranded wire 100 has a stranded wire layer 102 having a three-layer structure. Further, as shown in FIG. 11, a plurality (54 in FIG. 11) of conductor wires 103 are layered around the central conductor 101 composed of a plurality of wires (7 in FIG. 11). And what is twisted concentrically is the concentric stranded wire 110, and has a stranded wire layer 112 having a three-layer structure. Each twisted wire 100, 110 may have an insulating coating layer 105 around it, depending on the application or need. Further, as the constituent wire of the center conductor and the conductor wire 103, generally, a copper wire having high conductivity is used.

ロボットアームなどの駆動用電源ケーブルや屋外用送電線などの電源・電力用ケーブル、信号伝送（信号線）用ケーブルは、動きが激しい部位に使用されることから、外力による強制的な動き（屈曲）を伴う。このため、これらのケーブルにおいては、良好な屈曲特性が求められる。例えば、Ｓｎを0.1〜0.9wt％、Ｉｎを0.1〜0.5wt％、酸素を50ppm以下含み、残部がＣｕから成る熱処理された銅合金で構成される銅合金線がある（例えば、特許文献１参照）。   Power cables for driving such as robot arms, power / power cables such as outdoor power transmission lines, and signal transmission (signal line) cables are used in areas where movement is intense. ) Is accompanied. For this reason, these cables are required to have good bending characteristics. For example, there is a copper alloy wire composed of a heat-treated copper alloy containing 0.1 to 0.9 wt% of Sn, 0.1 to 0.5 wt% of In, 50 ppm or less of oxygen, and the balance of Cu (for example, see Patent Document 1) ).

特開２０００−９６２００号公報JP 2000-96200 A

特許文献１記載の銅合金線では、良好な屈曲特性が得られる。これは銅合金の組成及び製造プロセス（熱処理プロセス）を適正化したことにより、銅合金自体の引張強度が向上したことに起因している。   With the copper alloy wire described in Patent Document 1, good bending characteristics can be obtained. This is because the tensile strength of the copper alloy itself is improved by optimizing the composition and manufacturing process (heat treatment process) of the copper alloy.

ところで、特許文献１記載の銅合金線では、銅合金線（導体素線）の引張強度により屈曲寿命が決まり、銅合金線の引張強度が高い程、屈曲寿命が長くなる。しかし、銅合金線の引張強度の向上には自ずと限界があることから、屈曲特性の向上についても限界があった。   By the way, in the copper alloy wire described in Patent Document 1, the bending life is determined by the tensile strength of the copper alloy wire (conductor wire). The higher the tensile strength of the copper alloy wire, the longer the bending life. However, since there is a limit to the improvement of the tensile strength of the copper alloy wire, there is a limit to the improvement of the bending property.

以上の事情を考慮して創案された本発明の目的は、導体素線の引張強度に左右されることなく、屈曲特性が良好な撚線及びそれを用いた耐屈曲ケーブルを提供することにある。   An object of the present invention created in view of the above circumstances is to provide a twisted wire having good bending characteristics and a bending-resistant cable using the same without being influenced by the tensile strength of the conductor wire. .

上記目的を達成すべく本発明に係る撚線は、中心導体の周りに、導体素線を撚り合わせてなる撚線層を有する撚線において、上記導体素線、及びその導体素線よりも引張強度の高い高強度導体素線を用いて撚り合わせ、上記撚線層を形成したものである。   In order to achieve the above object, a stranded wire according to the present invention is a stranded wire having a stranded wire layer formed by twisting a conductor strand around a central conductor, and is more tensioned than the conductor strand and the conductor strand. The stranded wire layer is formed by twisting together using a high-strength, high-strength conductor wire.

ここで、高強度導体素線は、Cu-In系合金で構成されるものであってもよい。また、導体素線は、Cu-In系合金又はCu-Sn-In系合金のアニール処理材或いはフルアニール処理材で、上記高強度導体素線が、Cu-In系合金又はCu-Sn-In系合金のアニール未処理材で構成されるものであってもよい。   Here, the high-strength conductor wire may be made of a Cu—In alloy. The conductor wire is a Cu-In alloy or Cu-Sn-In alloy annealed material or full annealed material, and the high-strength conductor wire is a Cu-In alloy or Cu-Sn-In It may be composed of a non-annealed material of a system alloy.

撚線層の内、最外層の直下の層は、高強度導体素線で構成してもよい。また、撚線層の最外層を除く全ての層は、高強度導体素線で構成してもよい。さらに、中心導体の少なくとも一部は、高強度導体素線で構成してもよい。   Of the stranded wire layer, the layer immediately below the outermost layer may be composed of a high-strength conductor wire. Moreover, you may comprise all the layers except the outermost layer of a strand wire layer with a high intensity | strength conductor strand. Furthermore, at least a part of the center conductor may be composed of a high-strength conductor wire.

高強度導体素線は、１種類の線材からなってもよい。また、高強度導体素線は、引張強度の異なる少なくとも２種類の線材を含んでいてもよい。   The high-strength conductor wire may consist of one type of wire. The high-strength conductor wire may include at least two types of wires having different tensile strengths.

また、本発明に係る撚線は、中心導体の周りに、導体素線を撚り合わせてなる撚線層を有する撚線において、上記導体素線及び銅被覆鋼線を用いて撚り合わせ、上記撚線層を形成したものである。   In addition, the stranded wire according to the present invention is a stranded wire having a stranded wire layer formed by twisting a conductor wire around a central conductor, and is twisted by using the conductor wire and the copper-coated steel wire. A line layer is formed.

ここで、撚線層の内、最外層の直下の層は、銅被覆鋼線で構成してもよい。また、撚線層の最外層を除く全ての層は、上記銅被覆鋼線で構成してもよい。さらに、中心導体の少なくとも一部は、銅被覆鋼線で構成してもよい。   Here, in the stranded wire layer, the layer immediately below the outermost layer may be formed of a copper-coated steel wire. Moreover, you may comprise all the layers except the outermost layer of a strand wire layer with the said copper covering steel wire. Furthermore, you may comprise at least one part of a center conductor with a copper covering steel wire.

銅被覆鋼線は、１種類の鋼線材からなってもよい。また、銅被覆鋼線は、引張強度の異なる少なくとも２種類の鋼線材を含んでいてもよい。   The copper-coated steel wire may be made of one type of steel wire material. Moreover, the copper covering steel wire may contain the at least 2 types of steel wire material from which tensile strength differs.

銅被覆鋼線は、400MPa以上の引張強度を有することが好ましい。   The copper-coated steel wire preferably has a tensile strength of 400 MPa or more.

一方、本発明に係る耐屈曲ケーブルは、前述した撚線の周りに、絶縁被覆層を設けたものである。   On the other hand, the bending resistant cable according to the present invention is provided with an insulating coating layer around the above-described stranded wire.

本発明によれば、屈曲特性及び導電率の調整が可能な撚線を得ることができるという優れた効果を発揮する。   According to the present invention, it is possible to obtain an excellent effect that a stranded wire capable of adjusting bending characteristics and conductivity can be obtained.

以下、本発明の好適な実施の形態を添付図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

（第１の実施形態）
本発明の好適一実施の形態に係る撚線の横断面図を図１に、図１における高強度導体素線の拡大断面図を図２に示す。 (First embodiment)
FIG. 1 shows a cross-sectional view of a stranded wire according to a preferred embodiment of the present invention, and FIG. 2 shows an enlarged cross-sectional view of a high-strength conductor wire in FIG.

図１に示すように、本発明の好適一実施の形態に係る撚線１０は、中心導体１１の周りに、導体素線１３と、その導体素線１３よりも引張強度の高い高強度導体素線１４とを撚り合わせてなる複層構造（図１中では３層構造）の撚線層１２を有している。この撚線１０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。   As shown in FIG. 1, a stranded wire 10 according to a preferred embodiment of the present invention includes a conductor wire 13 around a central conductor 11 and a high-strength conductor element having a higher tensile strength than the conductor wire 13. A stranded wire layer 12 having a multilayer structure (three-layer structure in FIG. 1) formed by twisting the wire 14 is provided. What provided the insulating coating layer 15 in the outer periphery of this twisted wire 10 turns into a bending resistant cable.

ここで、撚線１０は、集合撚り線であり、複数本（図１中では７本）の素線からなる中心導体１１及び複数本（図１中では５４本）の素線（導体素線１３と高強度導体素線１４を混ぜた束線）をまとめて撚り合わせたものである。また、中心導体１１は、図１に示したように、導体素線１３と高強度導体素線１４を混ぜた束線で形成する他に、導体素線１３のみで形成してもよい。   Here, the stranded wire 10 is a collective stranded wire, and includes a central conductor 11 composed of a plurality of (7 in FIG. 1) strands and a plurality (54 in FIG. 1) of strands (conductor strands). 13 and high-strength conductor wire 14) are bundled together. Further, as shown in FIG. 1, the center conductor 11 may be formed of only the conductor wire 13 in addition to the bundle wire in which the conductor wire 13 and the high-strength conductor wire 14 are mixed.

導体素線１３の構成材としては、80％IACS以上の導電率を有するものが好ましく、例えば、純Ｃｕ（例えば、引張強度が約200MPaのタフピッチ銅（以下、TPCと記す））、導電性が良好なＣｕ合金（例えば、Cu-Ag系合金）、引張強度が高いＣｕ合金（例えば、Cu-In系合金、具体的には引張強度が約300MPa以上のCu-In合金、Cu-Sn-In合金）などが挙げられる。   The constituent material of the conductor wire 13 preferably has a conductivity of 80% IACS or higher. For example, pure Cu (for example, tough pitch copper having a tensile strength of about 200 MPa (hereinafter referred to as TPC)), conductivity is good. Good Cu alloy (for example, Cu-Ag alloy), Cu alloy with high tensile strength (for example, Cu-In alloy, specifically Cu-In alloy having a tensile strength of about 300 MPa or more, Cu-Sn-In Alloy).

高強度導体素線１４としては、導体素線１３よりも引張強度が高い線材であれば特に限定するものではないが、例えば、導体素線１３がTPCで構成される場合、Cu-In系合金などが挙げられる。また、導体素線１３がCu-In系合金のアニール処理材又はフルアニール処理材で構成される場合、Cu-In系合金の未アニール処理材などが挙げられる。さらに、導体素線１３がTPCやCu-In系合金（Cu-In合金、Cu-Sn-In合金）で構成される場合、図２に示すように、鋼線２１の周りを銅被覆層２２で被覆した銅被覆鋼線などが挙げられる。高強度導体素線１４として銅被覆鋼線を用いることで、導体素線１３の約２〜３倍、具体的には、400MPa以上、好ましくは400〜700MPaの引張強度を得ることが可能となる。   The high-strength conductor wire 14 is not particularly limited as long as it has a higher tensile strength than the conductor strand 13. For example, when the conductor strand 13 is made of TPC, a Cu—In alloy is used. Etc. Moreover, when the conductor strand 13 is comprised with the annealing treatment material of a Cu-In type alloy, or a full annealing treatment material, the unannealed treatment material of a Cu-In type alloy etc. are mentioned. Further, when the conductor wire 13 is made of TPC or a Cu—In alloy (Cu—In alloy, Cu—Sn—In alloy), as shown in FIG. Copper-coated steel wire coated with By using a copper-coated steel wire as the high-strength conductor wire 14, it is possible to obtain a tensile strength of about 2 to 3 times the conductor wire 13, specifically 400 MPa or more, preferably 400 to 700 MPa. .

銅被覆層２２の構成材は、純Ｃｕ又はＣｕ合金のいずれであってもよい。また、銅被覆層２２の層厚は、鋼線２１の表面を完全に覆うことができる厚さであれば、特に限定するものではない。例えば、製造の容易さを考慮すると、銅被覆層２２の層厚は、最低でも約20μｍあればよく、これよりも厚い方がより好ましい。さらに、銅被覆層２２の形成方法は、メッキなどの化学的手法や、押出被覆などの物理的手法のいずれを用いてもよい。   The constituent material of the copper coating layer 22 may be pure Cu or a Cu alloy. Moreover, the layer thickness of the copper coating layer 22 will not be specifically limited if it is the thickness which can cover the surface of the steel wire 21 completely. For example, considering the ease of manufacture, the thickness of the copper coating layer 22 may be at least about 20 μm, and is preferably thicker than this. Furthermore, as a method for forming the copper coating layer 22, either a chemical method such as plating or a physical method such as extrusion coating may be used.

撚線層１２全体に占める高強度導体素線１４の割合を多くすると、引張強度は著しく向上するものの、導電率が低下してしまう。そこで、この高強度導体素線１４の割合は、所望とする導電率及び引張強度に応じて適宜選択される。   Increasing the proportion of the high-strength conductor wire 14 occupying the entire stranded wire layer 12 significantly increases the tensile strength but decreases the electrical conductivity. Therefore, the ratio of the high-strength conductor wire 14 is appropriately selected according to the desired conductivity and tensile strength.

本実施の形態においては、全ての高強度導体素線１４の引張強度が同じ場合（１種類の線材で構成される場合）について説明を行ったが、これに限定するものではない。つまり、引張強度の異なる少なくとも２種類の線材で構成される高強度導体素線１４を用いてもよい。例えば、撚線１０の、撚線層１２の外側に配置される高強度導体素線は、銅被覆層２２を薄くした引張強度優先タイプの線材とし、撚線１０の、撚線層１２の内側に配置される高強度導体素線は、銅被覆層２２を厚くした導電率優先タイプの線材としてもよい。また、この逆に、撚線層１２の外側に配置される高強度導体素線を導電率優先タイプ、撚線層１２の内側に配置される高強度導体素線を引張強度優先タイプとしてもよい。   In the present embodiment, the case where the tensile strengths of all the high-strength conductor wires 14 are the same (in the case where the high-strength conductor wires 14 are formed of one kind of wire) has been described, but the present invention is not limited to this. That is, you may use the high intensity | strength conductor strand 14 comprised with at least 2 types of wire from which tensile strength differs. For example, the high-strength conductor wire disposed outside the stranded wire 12 of the stranded wire 10 is a tensile strength priority type wire with the copper coating layer 22 made thin, and the inside of the stranded wire 12 of the stranded wire 10 The high-strength conductor strands arranged in (1) may be a conductivity-priority type wire with a thick copper coating layer 22. On the contrary, the high-strength conductor wire arranged outside the stranded wire layer 12 may be a conductivity priority type, and the high-strength conductor wire arranged inside the stranded wire layer 12 may be a tensile strength priority type. .

また、図１に示した本実施の形態に係る撚線１０の一変形例を図３に示すように、撚線３０は、複数本（図３中では７本）の素線（導体素線１３と高強度導体素線１４を混ぜた束線）からなる中心導体１１の周りに、複数本（図３中では５４本）の素線（導体素線１３と高強度導体素線１４を混ぜた束線）を層状に、かつ、同心状に撚り合わせた同心撚り線であってもよい。つまり、撚線３０は、中心導体１１の周りに、導体素線１３と高強度導体素線１４とを同心状に撚り合わせてなる複層構造（図３中では３層構造）の撚線層３２を有している。この撚線３０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。   Further, as shown in FIG. 3 as a modification of the stranded wire 10 according to the present embodiment shown in FIG. 1, the stranded wire 30 is composed of a plurality of strands (seven in FIG. 3) (conductor strands). A plurality of wires (54 wires in FIG. 3) (conductor wires 13 and high-strength conductor wires 14) are mixed around a central conductor 11 composed of a bundle of 13 and high-strength conductor wires 14). Concentric strands in which the bundled wires are layered and concentrically twisted. That is, the stranded wire 30 is a stranded wire layer having a multilayer structure (three-layer structure in FIG. 3) in which the conductor strand 13 and the high-strength conductor strand 14 are concentrically twisted around the central conductor 11. 32. What provided the insulating coating layer 15 in the outer periphery of this twisted wire 30 becomes a bending-resistant cable.

次に、本実施の形態の作用を説明する。   Next, the operation of the present embodiment will be described.

一般に、線径が同じである場合、鋼線は、Ｃｕ又はＣｕ合金で構成される導体素線１３の約２〜３倍の引張強度を有していることから、導体素線１３と鋼線とを撚り合わせて撚線層１２を形成することで、屈曲寿命の向上を図ることができる。ところが、大気中又は多湿環境下で、Ｃｕ（導体素線１３）とＦｅ（鋼線）を接触放置すると、電池作用腐食（異種金属接触腐食）により腐食が進行してしまう。   In general, when the wire diameter is the same, the steel wire has a tensile strength of about 2 to 3 times that of the conductor wire 13 made of Cu or Cu alloy. The twist life can be improved by forming the stranded wire layer 12 by twisting together. However, when Cu (conductor wire 13) and Fe (steel wire) are left in contact in the atmosphere or in a humid environment, corrosion proceeds due to battery action corrosion (dissimilar metal contact corrosion).

そこで、本実施の形態に係る撚線１０においては、高強度導体素線１４の一例として、鋼線２１の周りを銅被覆層２２で被覆した銅被覆鋼線を用いている。これによって、導体素線１３と、その導体素線１３に隣接配置された高強度導体素線（銅被覆鋼線）１４との接触が同種金属接触となり、導体素線１３と高強度導体素線（銅被覆鋼線）１４との間で腐食が進行するおそれはない。また、この高強度導体素線（銅被覆鋼線）１４は、導体素線１３の約２倍の引張強度を有していることから、導体素線１３と高強度導体素線１４を撚り合わせて撚線層１２を形成した撚線１０は、導体素線１０３だけで撚線層１０２を形成した撚線１００（図１０参照）と比べて、屈曲寿命を長くすることができる。   Therefore, in the stranded wire 10 according to the present embodiment, a copper-coated steel wire in which the periphery of the steel wire 21 is covered with the copper coating layer 22 is used as an example of the high-strength conductor wire 14. As a result, the contact between the conductor strand 13 and the high-strength conductor strand (copper-coated steel wire) 14 disposed adjacent to the conductor strand 13 becomes the same kind of metal contact, and the conductor strand 13 and the high-strength conductor strand There is no possibility that corrosion will proceed with the (copper-coated steel wire) 14. In addition, since the high-strength conductor wire (copper-coated steel wire) 14 has a tensile strength approximately twice that of the conductor strand 13, the conductor strand 13 and the high-strength conductor strand 14 are twisted together. The stranded wire 10 in which the stranded wire layer 12 is formed can have a longer bending life than the stranded wire 100 (see FIG. 10) in which the stranded wire layer 102 is formed only by the conductor strand 103.

撚線１０の屈曲特性は、高強度導体素線１４自体の引張強度、及び撚線層１２全体に占める高強度導体素線１４の割合に大きく依存しており、導体素線１３自体の引張強度の割合は低い。このため、導体素線１３の引張強度を重視する必要性はあまりない。よって、導体素線１３は、導電率を重視した材料（例えば、純Ｃｕ）で形成してもよい。その結果、引張強度は高強度導体素線１４、導電率は導体素線１３という具合に、撚線１０に要求される機能を、導体素線１３及び高強度導体素線１４で分担させることができる。このため、同じ導体素線１３及び高強度導体素線１４を用いながらも、屈曲特性及び導電率の異なる複数の撚線を作製することができる。   The bending property of the stranded wire 10 depends greatly on the tensile strength of the high-strength conductor wire 14 itself and the ratio of the high-strength conductor wire 14 in the entire stranded wire layer 12. The percentage is low. For this reason, there is not much necessity to give great importance to the tensile strength of the conductor wire 13. Therefore, you may form the conductor strand 13 with the material (for example, pure Cu) which attached importance to the electrical conductivity. As a result, the conductor element 13 and the high-strength conductor element 14 can share the functions required of the stranded wire 10 such that the tensile strength is the high-strength conductor element 14 and the conductivity is the conductor element 13. it can. For this reason, while using the same conductor strand 13 and the high-strength conductor strand 14, the several twisted wire from which a bending characteristic and electrical conductivity differ can be produced.

また、図１０に示した従来の撚線１００は、一旦、導体素線の材質を決定すると、線径及び素線数を変えることでしか、屈曲特性及び導電率を調整することができなかった。これに対して、本実施の形態に係る撚線１０は、撚線層１２全体に占める高強度導体素線１４の割合を変えることで、線径は一定に保ったまま、屈曲特性及び導電率を自在に調整することができる。   Moreover, once the material of the conductor strand was determined for the conventional stranded wire 100 shown in FIG. 10, the bending characteristics and conductivity could be adjusted only by changing the wire diameter and the number of strands. . On the other hand, the twisted wire 10 according to the present embodiment changes the ratio of the high-strength conductor element wire 14 occupying the entire twisted wire layer 12 so that the wire diameter is kept constant and the bending characteristics and conductivity are kept constant. Can be adjusted freely.

本実施の形態に係る撚線１０は、撚線層１２における導体素線１３及び高強度導体素線１４の配置はランダムであり、それらの配置位置は任意であることから、撚線層１２の形成が容易となり、ケーブルの製造プロセスが簡略化される。その結果、撚線１０を安価に製造することができる。   In the stranded wire 10 according to the present embodiment, the arrangement of the conductor wires 13 and the high-strength conductor wires 14 in the stranded wire layer 12 is random, and the arrangement positions thereof are arbitrary. It is easy to form and simplifies the cable manufacturing process. As a result, the stranded wire 10 can be manufactured at low cost.

次に、本発明の他の実施の形態を添付図面に基づいて説明する。   Next, another embodiment of the present invention will be described with reference to the accompanying drawings.

（第２の実施形態）
本発明の他の好適一実施の形態に係る撚線の横断面図を図４に示す。尚、図１と同様の部材には同じ符号を付しており、これらの部材については説明を省略する。 (Second Embodiment)
A cross-sectional view of a stranded wire according to another preferred embodiment of the present invention is shown in FIG. In addition, the same code | symbol is attached | subjected to the member similar to FIG. 1, and description is abbreviate | omitted about these members.

図１に示した撚線１０は、撚線層１２における導体素線１３及び高強度導体素線１４の配置がランダムなものであった。   In the stranded wire 10 shown in FIG. 1, the arrangement of the conductor wires 13 and the high-strength conductor wires 14 in the stranded wire layer 12 is random.

これに対して、図４に示すように、本実施の形態に係る撚線４０は、図１に示した撚線１０と基本的な構造は同じであるが、撚線層４２の層構造が異なっている。具体的には、撚線層４２の内、最外層４２ｃの直下の層４２ｂが高強度導体素線１４で構成され、層４２ｂを除く層（図４中では層４２ａ，４２ｃ）が導体素線１３で構成される。   On the other hand, as shown in FIG. 4, the stranded wire 40 according to the present embodiment has the same basic structure as the stranded wire 10 shown in FIG. Is different. Specifically, in the stranded wire layer 42, the layer 42b immediately below the outermost layer 42c is composed of the high-strength conductor strand 14, and the layers excluding the layer 42b (layers 42a and 42c in FIG. 4) are conductor strands. 13.

ここで、中心導体１１の少なくとも一部が、高強度導体素線１４で構成されてもよい。言い換えると、導体素線１３と高強度導体素線１４を混ぜた束線で、中心導体１１を形成してもよい。   Here, at least a part of the center conductor 11 may be composed of the high-strength conductor wire 14. In other words, the central conductor 11 may be formed by a bundled wire in which the conductor wire 13 and the high-strength conductor wire 14 are mixed.

この撚線４０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。本実施の形態に係る撚線４０及び耐屈曲ケーブルにおいても、第１の実施形態に係る撚線１０及び耐屈曲ケーブルと同様の作用効果が得られる。   What provided the insulating coating layer 15 in the outer periphery of this twisted wire 40 becomes a bending-resistant cable. Also in the stranded wire 40 and the bending resistant cable according to the present embodiment, the same effects as the stranded wire 10 and the bending resistant cable according to the first embodiment can be obtained.

更に、本実施の形態に係る撚線４０においては、撚線層４２の内、最外層４２ｃの直下の層４２ｂを高強度導体素線１４で構成している。一般に、ケーブルを屈曲させるとケーブルに歪みが生じるが、最大歪みはケーブルの最外層に生じる。よって、ケーブルの断線は、ケーブル外層から内層側に向かって進行する。撚線４０は、撚線層４２の内、層４２ｂだけに高強度導体素線１４を配置させる必要があることから、図１に示した撚線１０と比較して、撚線層４２の形成工程がやや複雑になる。しかし、撚線４０は、最外層４２ｃの直下の層４２ｂを高強度導体素線１４で構成することによって、ケーブル外層から内層側に向かう断線の進行を、層４２ｂでくい止めることができるため、結果として、撚線４０の長寿命化（屈曲特性の向上）を図ることができる。また、撚線４０における撚線層４２の内、層４２ｂを除く層は全て導体素線１３で構成されるため、導電性を十分に確保することができる。   Furthermore, in the stranded wire 40 according to the present embodiment, the layer 42 b immediately below the outermost layer 42 c of the stranded wire layer 42 is constituted by the high-strength conductor wire 14. Generally, when a cable is bent, the cable is distorted, but the maximum distortion is generated in the outermost layer of the cable. Therefore, the disconnection of the cable proceeds from the cable outer layer toward the inner layer side. Since the stranded wire 40 needs to arrange the high-strength conductor wire 14 only in the layer 42b in the stranded wire layer 42, compared to the stranded wire 10 shown in FIG. The process is a little complicated. However, in the stranded wire 40, by forming the layer 42b immediately below the outermost layer 42c with the high-strength conductor element wire 14, the progress of disconnection from the cable outer layer toward the inner layer side can be stopped by the layer 42b. As a result, it is possible to extend the life of the stranded wire 40 (improve the bending property). Moreover, since all the layers except the layer 42b in the stranded wire layer 42 in the stranded wire 40 are composed of the conductor wires 13, sufficient conductivity can be ensured.

また、図４に示した撚線４０（集合撚り線）の一変形例を図５に示すように、撚線５０は、複数本（図５中では７本）の導体素線１３からなる中心導体１１の周りに、第１層５２ａとして複数本（図５中では１２本）の導体素線１３を、第２層５２ｂとして複数本（図５中では１８本）の高強度導体素線１４を、第３層５２ｃとして複数本（図５中では２４本）の導体素線１３を、それぞれ層状に、かつ、同心状に撚り合わせてなる同心撚り線であってもよい。つまり、導体素線１３で構成される中心導体１１の周りに、導体素線１３で構成される第１層５２ａ及び第３層５２ｃと高強度導体素線１４で構成される第２層５２ｂとを同心状に撚り合わせてなる複層構造（図５中では３層構造）の撚線層５２を有する撚線５０であってもよい。この撚線５０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。   Further, as shown in FIG. 5 as a modification of the stranded wire 40 (gathered stranded wire) shown in FIG. 4, the stranded wire 50 is a center composed of a plurality (seven in FIG. 5) of conductor wires 13. Around the conductor 11, a plurality of (12 in FIG. 5) conductor strands 13 as the first layer 52a and a plurality (18 in FIG. 5) of high-strength conductor strands 14 as the second layer 52b. Alternatively, the third layer 52c may be a concentric stranded wire in which a plurality of conductor wires 13 (24 in FIG. 5) are twisted in layers and concentrically. That is, the first layer 52 a and the third layer 52 c configured by the conductor strand 13 and the second layer 52 b configured by the high-strength conductor strand 14 around the central conductor 11 configured by the conductor strand 13; May be a stranded wire 50 having a stranded wire layer 52 having a multilayer structure (three-layer structure in FIG. 5) formed by concentrically twisting wires. What provided the insulating coating layer 15 in the outer periphery of this twisted wire 50 becomes a bending-resistant cable.

尚、上述の図４，図５に示したような撚線４０，５０における導体素線１３及び高強度導体素線１４の組み合わせとして、例えば、次のようなものが挙げられる。導体素線１３として、Cu-In系合金（例えば、Cu-0.1mass％In）やCu-Sn-In系合金（例えば、Cu-0.2mass％Sn-0.2mass％In，Cu-0.19mass％Sn-0.2mass％In）をアニール処理材又はフルアニール処理材が挙げられる。高強度導体素線１４として、Cu-In系合金（例えば、Cu-0.1mass％In）やCu-Sn-In系合金（例えば、Cu-0.2mass％Sn-0.2mass％In，Cu-0.19mass％Sn-0.2mass％In）のアニール未処理材（硬材（Ｈ材））が挙げられる。このような組み合わせを行うことで、撚線４０，５０の可撓性を向上させることができると共に、屈曲特性も向上させることができる。   Examples of the combination of the conductor wire 13 and the high-strength conductor wire 14 in the stranded wires 40 and 50 as shown in FIGS. 4 and 5 described above include the following. As the conductor wire 13, a Cu-In alloy (for example, Cu-0.1 mass% In) or a Cu-Sn-In alloy (for example, Cu-0.2 mass% Sn-0.2 mass% In, Cu-0.19 mass% Sn) -0.2 mass% In) is an annealing treatment material or a full annealing treatment material. As the high-strength conductor wire 14, a Cu-In alloy (for example, Cu-0.1 mass% In) or a Cu-Sn-In alloy (for example, Cu-0.2 mass% Sn-0.2 mass% In, Cu-0.19 mass) % Sn-0.2mass% In) annealed untreated material (hard material (H material)). By performing such a combination, the flexibility of the stranded wires 40 and 50 can be improved, and the bending characteristics can also be improved.

（第３の実施形態）
本発明の他の好適一実施の形態に係る撚線の横断面図を図６に示す。尚、図１と同様の部材には同じ符号を付しており、これらの部材については説明を省略する。 (Third embodiment)
FIG. 6 shows a cross-sectional view of a stranded wire according to another preferred embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member similar to FIG. 1, and description is abbreviate | omitted about these members.

図４に示した撚線４０は、撚線層４２の内、最外層４２ｃの直下の層４２ｂが高強度導体素線１４で構成され、層４２ｂを除く層が導体素線１３で構成されるものであった。   In the stranded wire 40 shown in FIG. 4, the layer 42 b immediately below the outermost layer 42 c in the stranded wire layer 42 is composed of the high-strength conductor strand 14, and the layers excluding the layer 42 b are composed of the conductor strand 13. It was a thing.

これに対して、図６に示すように、本実施の形態に係る撚線６０は、図１に示した撚線１０と基本的な構造は同じであるが、撚線層６２の層構造が異なっている。具体的には、撚線層６２の内、最外層６２ｃを除く全ての層（図６中では層６２ａ，６２ｂ）が高強度導体素線１４で構成され、最外層６２ｃが導体素線１３で構成される。   On the other hand, as shown in FIG. 6, the stranded wire 60 according to the present embodiment has the same basic structure as the stranded wire 10 shown in FIG. Is different. Specifically, in the stranded wire layer 62, all layers (the layers 62a and 62b in FIG. 6) except the outermost layer 62c are composed of the high-strength conductor wire 14, and the outermost layer 62c is the conductor wire 13. Composed.

ここで、中心導体１１の少なくとも一部が、高強度導体素線１４で構成されてもよい。言い換えると、導体素線１３と高強度導体素線１４を混ぜた束線で、中心導体１１を形成してもよい。   Here, at least a part of the center conductor 11 may be composed of the high-strength conductor wire 14. In other words, the central conductor 11 may be formed by a bundled wire in which the conductor wire 13 and the high-strength conductor wire 14 are mixed.

この撚線６０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。本実施の形態に係る撚線６０及び耐屈曲ケーブルにおいても、第１の実施形態に係る撚線１０及び耐屈曲ケーブルと同様の作用効果が得られる。   What provided the insulating coating layer 15 in the outer periphery of this twisted wire 60 becomes a bending-resistant cable. Also in the stranded wire 60 and the bending resistant cable according to the present embodiment, the same effects as the stranded wire 10 and the bending resistant cable according to the first embodiment can be obtained.

更に、本実施の形態に係る撚線６０においては、撚線層６２の内、最外層６２ｃだけを導体素線１３で構成し、その他の層６２ａ，６２ｂを高強度導体素線１４で構成している。このため、撚線６０は、図４に示した撚線４０と比較して、撚線の更なる長寿命化（屈曲特性の向上）を図ることができる。この撚線６０は、撚線層６２全体に占める高強度導体素線１４の割合が多いため、高い導電率を得にくい。このため、導体素線１３を、純Ｃｕ又は導電率の高いＣｕ合金で構成することが好ましい。この撚線６０は、非常に高い屈曲寿命が要求される耐屈曲ケーブルに好適である。   Furthermore, in the stranded wire 60 according to the present embodiment, only the outermost layer 62c of the stranded wire layer 62 is constituted by the conductor strand 13, and the other layers 62a and 62b are constituted by the high-strength conductor strand 14. ing. For this reason, compared with the twisted wire 40 shown in FIG. 4, the twisted wire 60 can aim at the further life extension (improvement of a bending characteristic) of a twisted wire. Since this stranded wire 60 has a large proportion of the high-strength conductor wire 14 in the entire stranded wire layer 62, it is difficult to obtain high electrical conductivity. For this reason, it is preferable to comprise the conductor strand 13 with pure Cu or Cu alloy with high electrical conductivity. The stranded wire 60 is suitable for a bending-resistant cable that requires a very high bending life.

また、図６に示した撚線６０（集合撚り線）の一変形例を図７に示すように、撚線７０は、複数本（図７中では７本）の導体素線１３からなる中心導体１１の周りに、第１層７２ａとして複数本（図７中では１２本）の高強度導体素線１４を、第２層７２ｂとして複数本（図７中では１８本）の高強度導体素線１４を、第３層７２ｃとして複数本（図７中では２４本）の導体素線１３を、それぞれ層状に、かつ、同心状に撚り合わせてなる同心撚り線であってもよい。つまり、導体素線１３で構成される中心導体１１の周りに、高強度導体素線１４で構成される第１層７２ａ及び第２層７２ｂと導体素線１３で構成される第３層７２ｃとを同心状に撚り合わせてなる複層構造（図７中では３層構造）の撚線層７２を有する撚線７０であってもよい。この撚線７０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。   Further, as shown in FIG. 7 as a modification of the stranded wire 60 (gathered stranded wire) shown in FIG. 6, the stranded wire 70 is a center composed of a plurality of conductor wires 13 (seven in FIG. 7). Around the conductor 11, a plurality of (12 in FIG. 7) high-strength conductor wires 14 are provided as the first layer 72a, and a plurality (18 in FIG. 7) of high-strength conductor elements are provided as the second layer 72b. The wire 14 may be a concentric stranded wire formed by twisting a plurality of (24 in FIG. 7) conductor strands 13 in layers and concentrically as the third layer 72c. That is, the first layer 72 a and the second layer 72 b configured by the high-strength conductor strand 14 and the third layer 72 c configured by the conductor strand 13 around the central conductor 11 configured by the conductor strand 13 and May be a stranded wire 70 having a stranded wire layer 72 having a multilayer structure (three-layer structure in FIG. 7) formed by concentrically twisting wires. What provided the insulating coating layer 15 in the outer periphery of this twisted wire 70 becomes a bending-resistant cable.

尚、上述の図６，図７に示したような撚線６０，７０における導体素線１３及び高強度導体素線１４の組み合わせとして、例えば、次のようなものが挙げられる。導体素線１３として、Cu-In系合金（例えば、Cu-0.1mass％In）やCu-Sn-In系合金（例えば、Cu-0.2mass％Sn-0.2mass％In，Cu-0.19mass％Sn-0.2mass％In）をアニール処理材又はフルアニール処理材が挙げられる。高強度導体素線１４として、Cu-In系合金（例えば、Cu-0.1mass％In）やCu-Sn-In系合金（例えば、Cu-0.2mass％Sn-0.2mass％In，Cu-0.19mass％Sn-0.2mass％In）のアニール未処理材（硬材（Ｈ材））が挙げられる。このような組み合わせを行うことで、撚線６０，７０の可撓性を向上させることができると共に、屈曲特性も向上させることができる。
（第４の実施形態）
本発明の他の好適一実施の形態に係る撚線の横断面図を図８に示す。尚、図１と同様の部材には同じ符号を付しており、これらの部材については説明を省略する。 In addition, as a combination of the conductor strand 13 and the high-strength conductor strand 14 in the twisted wires 60 and 70 as shown in FIGS. As the conductor wire 13, a Cu-In alloy (for example, Cu-0.1 mass% In) or a Cu-Sn-In alloy (for example, Cu-0.2 mass% Sn-0.2 mass% In, Cu-0.19 mass% Sn) -0.2 mass% In) is an annealing treatment material or a full annealing treatment material. As the high-strength conductor wire 14, a Cu-In alloy (for example, Cu-0.1 mass% In) or a Cu-Sn-In alloy (for example, Cu-0.2 mass% Sn-0.2 mass% In, Cu-0.19 mass) % Sn-0.2mass% In) annealed untreated material (hard material (H material)). By performing such a combination, the flexibility of the stranded wires 60 and 70 can be improved, and the bending characteristics can also be improved.
(Fourth embodiment)
FIG. 8 shows a cross-sectional view of a stranded wire according to another preferred embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member similar to FIG. 1, and description is abbreviate | omitted about these members.

図４に示した撚線４０及び図６に示した撚線６０は、撚線層の一部を高強度導体素線１４で構成したものであった。   The stranded wire 40 shown in FIG. 4 and the stranded wire 60 shown in FIG. 6 are configured such that a part of the stranded wire layer is composed of the high-strength conductor wire 14.

これに対して、図８に示すように、本実施の形態に係る撚線８０は、高強度導体素線１４で構成される中心導体１１の周りに、導体素線１３を撚り合わせてなる複層構造（図８中では３層構造）の撚線層８２を有している。ここで、撚線８０は、集合撚り線であり、複数本（図８中では７本）の高強度導体素線１４からなる中心導体１１及び複数本（図８中では５４本）の導体素線１３をまとめて撚り合わせたものである。   On the other hand, as shown in FIG. 8, the stranded wire 80 according to the present embodiment has a composite wire formed by twisting the conductor wire 13 around the central conductor 11 constituted by the high-strength conductor wire 14. The stranded wire layer 82 has a layer structure (three-layer structure in FIG. 8). Here, the stranded wire 80 is a collective stranded wire, and includes a central conductor 11 composed of a plurality of (seven in FIG. 8) high-strength conductor wires 14 and a plurality (54 in FIG. 8) of conductor elements. The wires 13 are twisted together.

この撚線８０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。本実施の形態に係る撚線８０及び耐屈曲ケーブルにおいても、第１の実施形態に係る撚線１０及び耐屈曲ケーブルと同様の作用効果が得られる。   What provided the insulating coating layer 15 in the outer periphery of this twisted wire 80 becomes a bending-resistant cable. Also in the stranded wire 80 and the bending resistant cable according to the present embodiment, the same effects as the stranded wire 10 and the bending resistant cable according to the first embodiment can be obtained.

更に、本実施の形態に係る撚線８０は、中心導体１１を高強度導体素線１４で構成し、撚線層８２を導体素線１３で構成しており、導体素線１３の層及び高強度導体素線１４の層という観点で捉えると、２層構造である。これに対して、図４に示した撚線４０及び図６に示した撚線６０は、導体素線１３の層及び高強度導体素線１４の層という観点で捉えると、３層構造である。よって、本実施の形態に係る撚線８０は、撚線４０及び撚線６０と比較して、層構造がシンプルであるため、撚り合わせが容易であり、ケーブルの製造プロセスが簡略化される。その結果、撚線８０は、図１０に示した撚線１００と略同等の導電性を有し、撚線１００よりも屈曲寿命が長く、かつ、撚線４０及び撚線６０よりも製造コストが安価となる。   Furthermore, in the stranded wire 80 according to the present embodiment, the central conductor 11 is composed of the high-strength conductor strand 14, and the stranded wire layer 82 is composed of the conductor strand 13. From the perspective of the layer of the strength conductor wire 14, it has a two-layer structure. On the other hand, the stranded wire 40 shown in FIG. 4 and the stranded wire 60 shown in FIG. 6 have a three-layer structure in terms of the layer of the conductor strand 13 and the layer of the high-strength conductor strand 14. . Therefore, the stranded wire 80 according to the present embodiment has a simple layer structure as compared with the stranded wire 40 and the stranded wire 60, so that the twisting is easy and the cable manufacturing process is simplified. As a result, the stranded wire 80 has substantially the same conductivity as the stranded wire 100 shown in FIG. 10, has a longer bending life than the stranded wire 100, and is less expensive to manufacture than the stranded wire 40 and the stranded wire 60. It will be cheap.

また、図８に示した撚線８０（集合撚り線）の一変形例を図９に示すように、撚線９０は、複数本（図９中では７本）の高強度導体素線１４からなる中心導体１１の周りに、第１層９２ａとして複数本（図９中では１２本）の導体素線１３を、第２層９２ｂとして複数本（図９中では１８本）の導体素線１３を、第３層９２ｃとして複数本（図９中では２４本）の導体素線１３を、それぞれ層状に、かつ、同心状に撚り合わせてなる同心撚り線であってもよい。つまり、高強度導体素線１４で構成される中心導体１１の周りに、導体素線１３で構成される第１層９２ａ、第２層９２ｂ、及び第３層９２ｃを同心状に撚り合わせてなる複層構造（図９中では３層構造）の撚線層９２を有する撚線９０であってもよい。この撚線９０の外周に絶縁被覆層１５を設けたものが、耐屈曲ケーブルとなる。   Further, as shown in FIG. 9 as a modification of the stranded wire 80 (gathered stranded wire) shown in FIG. 8, the stranded wire 90 includes a plurality of (seven in FIG. 9) high-strength conductor wires 14. Around the central conductor 11, a plurality of (12 in FIG. 9) conductor wires 13 are formed as the first layer 92a, and a plurality (18 in FIG. 9) of conductor wires 13 are formed as the second layer 92b. The third layer 92c may be a concentric stranded wire formed by twisting a plurality of conductor wires 13 (24 in FIG. 9) in layers and concentrically. That is, the first layer 92a, the second layer 92b, and the third layer 92c made of the conductor wire 13 are twisted concentrically around the central conductor 11 made of the high-strength conductor wire 14. A stranded wire 90 having a stranded wire layer 92 having a multilayer structure (three-layer structure in FIG. 9) may be used. What provided the insulating coating layer 15 in the outer periphery of this twisted wire 90 becomes a bending-resistant cable.

以上、本発明は、上述した実施の形態に限定されるものではなく、他にも種々のものが想定されることは言うまでもない。   As described above, the present invention is not limited to the above-described embodiment, and it goes without saying that various other things are assumed.

次に、本発明について、実施例に基づいて説明するが、本発明はこれらの実施例に限定されるものではない。   Next, although this invention is demonstrated based on an Example, this invention is not limited to these Examples.

導体素線として線径が0.1ｍｍ、引張強度が220MPaのTPC線材を、高強度導体素線として線径が0.1ｍｍ、引張強度が300MPaのCu-0.1mass％In線材を用い、図４に示した構造の集合撚線を作製した（試料１１）。   Fig. 4 shows a TPC wire with a wire diameter of 0.1 mm and a tensile strength of 220 MPa as the conductor wire, and a Cu-0.1 mass% In wire with a wire diameter of 0.1 mm and a tensile strength of 300 MPa as the high-strength conductor wire. An assembled stranded wire having the above structure was prepared (Sample 11).

導体素線として線径が0.1ｍｍ、引張強度が220MPaのTPC線材を、高強度導体素線として線径が0.1ｍｍ、引張強度が300MPaのCu-0.2mass％Sn-0.2mass％In線材を用い、図４に示した構造の集合撚線を作製した（試料１２）。   TPC wire with 0.1 mm diameter and 220 MPa tensile strength is used as the conductor wire, and Cu-0.2 mass% Sn-0.2 mass% In wire with 0.1 mm diameter and 300 MPa tensile strength is used as the high-strength conductor wire. The assembly strand wire of the structure shown in FIG. 4 was produced (sample 12).

導体素線として線径が0.1ｍｍ、引張強度が220MPaのTPC線材を用い、図１０に示した構造の集合撚線を作製した（試料１３）。   Using a TPC wire having a wire diameter of 0.1 mm and a tensile strength of 220 MPa as a conductor wire, an assembled stranded wire having the structure shown in FIG. 10 was prepared (Sample 13).

得られた試料１１〜１３の各集合撚線について、屈曲特性の評価を行った。屈曲特性は、屈曲寿命の長短により評価した。ここで言う屈曲寿命とは、集合撚線に特定の歪み割合の屈曲を繰り返し行った際に、集合撚線を構成する素線が少なくとも１本断線した時の屈曲回数を表している。   The bending properties of each of the assembled strands of Samples 11 to 13 obtained were evaluated. The bending characteristics were evaluated based on the length of the bending life. The term “bending life” as used herein refers to the number of bendings when at least one of the strands constituting the collective stranded wire is disconnected when the collective stranded wire is repeatedly bent at a specific strain ratio.

試料１３における集合撚線の屈曲寿命は500,000回であったのに対して、試料１１，１２における各集合撚線の屈曲寿命はいずれも700,000回であった。つまり、本発明の撚線である試料１１，１２は、従来の撚線である試料１３と比べて、屈曲特性が1.4倍に向上することが確認できた。   The bending life of the collective stranded wire in the sample 13 was 500,000 times, whereas the bending life of each collective stranded wire in the samples 11 and 12 was 700,000 times. That is, it was confirmed that the bending properties of the samples 11 and 12 which are the stranded wires of the present invention are improved by 1.4 times compared to the sample 13 which is a conventional stranded wire.

導体素線として線径が0.1ｍｍ、引張強度が220MPaのTPC線材を、高強度導体素線として線径が0.1ｍｍ、引張強度が300MPaのCu-0.1mass％In線材を用い、図８に示した構造の集合撚線を作製した（試料２１）。   A TPC wire with a wire diameter of 0.1 mm and a tensile strength of 220 MPa is used as the conductor wire, and a Cu-0.1 mass% In wire with a wire diameter of 0.1 mm and a tensile strength of 300 MPa is used as the high-strength conductor wire, as shown in FIG. An assembled stranded wire having the above structure was prepared (Sample 21).

導体素線として線径が0.1ｍｍ、引張強度が220MPaのTPC線材を、高強度導体素線として線径が0.1ｍｍ、引張強度が300MPaのCu-0.2mass％Sn-0.2mass％In線材を用い、図８に示した構造の集合撚線を作製した（試料２２）。   TPC wire with 0.1 mm diameter and 220 MPa tensile strength is used as the conductor wire, and Cu-0.2 mass% Sn-0.2 mass% In wire with 0.1 mm diameter and 300 MPa tensile strength is used as the high-strength conductor wire. The assembly strand wire of the structure shown in FIG. 8 was produced (sample 22).

得られた試料２１，２２の各集合撚線及び［実施例１］の試料１３の集合撚線について、屈曲特性の評価を行った。   The bending characteristics of each of the assembled strands of the obtained samples 21 and 22 and the assembled strand of the sample 13 of [Example 1] were evaluated.

試料１３における集合撚線の屈曲寿命は500,000回であったのに対して、試料２１，２２における各集合撚線の屈曲寿命は650,000回であった。つまり、本発明の撚線である試料２１，２２は、従来の撚線である試料１３と比べて、屈曲特性が1.3倍に向上することが確認できた。   The bending life of the collective stranded wire in Sample 13 was 500,000 times, whereas the bending life of each of the collective stranded wires in Samples 21 and 22 was 650,000. That is, it was confirmed that the bending characteristics of Samples 21 and 22 which are the stranded wires of the present invention were improved 1.3 times compared to Sample 13 which was a conventional stranded wire.

導体素線として線径が1.0ｍｍ、引張強度が220MPaのTPC線材を、高強度導体素線として線径が1.0ｍｍ、銅被覆層の層厚が20〜50μｍ、引張強度が500MPaの銅被覆鋼線を用い、図４に示した構造で、４層構造の撚線層を有する集合撚線（素線総数９１本）を作製した（試料３１）。中心導体（素線数７本）、第１層（素線数１８本）、第２層（素線数１８本）、及び第４層（素線数３０本）はTPC線材で、第３層（素線数２４本）は銅被覆鋼線で形成した。   TPC wire with a conductor diameter of 1.0mm and tensile strength of 220MPa, high-strength conductor wire with a diameter of 1.0mm, copper coating layer thickness of 20-50μm, and copper-coated steel with a tensile strength of 500MPa Using the wire, an assembly stranded wire (91 strands in total) having a four-layer stranded wire layer with the structure shown in FIG. 4 was prepared (Sample 31). The central conductor (7 strands), the first layer (18 strands), the second layer (18 strands), and the fourth layer (30 strands) are TPC wires. The layer (24 wires) was formed of a copper-coated steel wire.

得られた試料３１の集合撚線及び［実施例１］の試料１３の集合撚線について、屈曲特性の評価を行った。   The bending properties of the assembled strand of the obtained sample 31 and the assembled strand of the sample 13 of [Example 1] were evaluated.

試料１３における集合撚線の屈曲寿命は500,000回であったのに対して、試料３１における集合撚線の屈曲寿命は800,000回であった。つまり、本発明の撚線である試料３１は、従来の撚線である試料１３と比べて、屈曲特性が1.6倍に向上することが確認できた。   The bending life of the collective stranded wire in the sample 13 was 500,000 times, whereas the bending life of the collective stranded wire in the sample 31 was 800,000 times. That is, it was confirmed that the sample 31 which is a stranded wire according to the present invention has a bending characteristic improved by 1.6 times compared to the sample 13 which is a conventional stranded wire.

本発明の好適一実施の形態に係る撚線の横断面図である。It is a cross-sectional view of a stranded wire according to a preferred embodiment of the present invention. 図１における高強度導体素線の拡大断面図である。It is an expanded sectional view of the high intensity | strength conductor strand in FIG. 図１の一変形例である。It is a modification of FIG. 本発明の他の好適一実施の形態に係る撚線の横断面図である。It is a cross-sectional view of a stranded wire according to another preferred embodiment of the present invention. 図４の一変形例である。It is a modification of FIG. 本発明の別の好適一実施の形態に係る撚線の横断面図である。It is a cross-sectional view of a stranded wire according to another preferred embodiment of the present invention. 図６の一変形例である。It is a modification of FIG. 本発明の更に別の好適一実施の形態に係る撚線の横断面図である。It is a cross-sectional view of a stranded wire according to still another preferred embodiment of the present invention. 図８の一変形例である。It is a modification of FIG. 従来のケーブルの一例を示す横断面図である。It is a cross-sectional view showing an example of a conventional cable. 従来のケーブルの他の例を示す横断面図である。It is a cross-sectional view which shows the other example of the conventional cable.

符号の説明Explanation of symbols

１０ 撚線
１１ 中心導体
１２ 撚線層
１３ 導体素線
１４ 高強度導体素線
10 Stranded wire 11 Central conductor 12 Stranded wire layer 13 Conductor strand 14 High-strength conductor strand

Claims (17)

中心導体の周りに、導体素線を撚り合わせてなる撚線層を有する撚線において、上記導体素線、及びその導体素線よりも引張強度の高い高強度導体素線を用いて撚り合わせ、上記撚線層を形成したことを特徴とする撚線。   In the stranded wire having a stranded wire layer formed by twisting the conductor wire around the central conductor, the conductor wire and the high-strength conductor wire having a higher tensile strength than the conductor wire are twisted together, A stranded wire, wherein the stranded wire layer is formed. 上記高強度導体素線が、Cu-In系合金で構成される請求項１記載の撚線。   The stranded wire according to claim 1, wherein the high-strength conductor strand is made of a Cu—In alloy. 上記導体素線が、Cu-In系合金又はCu-Sn-In系合金のアニール処理材或いはフルアニール処理材で、上記高強度導体素線が、Cu-In系合金又はCu-Sn-In系合金のアニール未処理材で構成される請求項１記載の撚線。   The conductor wire is a Cu-In alloy or Cu-Sn-In alloy annealed or full annealed material, and the high-strength conductor wire is a Cu-In alloy or Cu-Sn-In alloy. The stranded wire according to claim 1, which is made of an alloy untreated material. 上記撚線層の内、最外層の直下の層が、上記高強度導体素線で構成される請求項１から３いずれかに記載の撚線。   The stranded wire according to any one of claims 1 to 3, wherein a layer immediately below the outermost layer of the stranded wire layer is composed of the high-strength conductor strand. 上記撚線層の最外層を除く全ての層が、上記高強度導体素線で構成される請求項１から３いずれかに記載の撚線。   All the layers except the outermost layer of the said strand wire layer are the twisted wires in any one of Claim 1 to 3 comprised with the said high intensity | strength conductor strand. 上記中心導体の少なくとも一部が、上記高強度導体素線で構成される請求項１から５いずれかに記載の撚線。   The stranded wire according to any one of claims 1 to 5, wherein at least a part of the central conductor is composed of the high-strength conductor wire. 上記高強度導体素線が、１種類の線材からなる請求項１から６いずれかに記載の撚線。   The stranded wire according to any one of claims 1 to 6, wherein the high-strength conductor strand is made of one type of wire. 上記高強度導体素線が、引張強度の異なる少なくとも２種類の線材を含む請求項１から６いずれかに記載の撚線。   The stranded wire according to any one of claims 1 to 6, wherein the high-strength conductor strand includes at least two types of wires having different tensile strengths. 請求項１から８いずれかに記載の撚線の周りに、絶縁被覆層を設けたことを特徴とする耐屈曲ケーブル。   A bending-resistant cable, wherein an insulating coating layer is provided around the stranded wire according to claim 1. 中心導体の周りに、導体素線を撚り合わせてなる撚線層を有する撚線において、上記導体素線及び銅被覆鋼線を用いて撚り合わせ、上記撚線層を形成したことを特徴とする撚線。   A stranded wire having a stranded wire layer formed by twisting conductor strands around a central conductor, and the stranded wire layer is formed by twisting together using the conductor strand and the copper-coated steel wire. Stranded wire. 上記撚線層の内、最外層の直下の層が、上記銅被覆鋼線で構成される請求項１０記載の撚線。   The stranded wire according to claim 10, wherein a layer immediately below the outermost layer among the stranded wire layers is composed of the copper-coated steel wire. 上記撚線層の最外層を除く全ての層が、上記銅被覆鋼線で構成される請求項１０記載の撚線。   The stranded wire according to claim 10, wherein all layers except the outermost layer of the stranded wire layer are composed of the copper-coated steel wire. 上記中心導体の少なくとも一部が、上記銅被覆鋼線で構成される請求項１０から１２いずれかに記載の撚線。   The stranded wire according to any one of claims 10 to 12, wherein at least a part of the central conductor is made of the copper-coated steel wire. 上記銅被覆鋼線が、１種類の鋼線材からなる請求項１０から１３いずれかに記載の撚線。   The stranded wire according to any one of claims 10 to 13, wherein the copper-coated steel wire is made of one type of steel wire. 上記銅被覆鋼線が、引張強度の異なる少なくとも２種類の鋼線材を含む請求項１０から１３いずれかに記載の撚線。   The stranded wire according to any one of claims 10 to 13, wherein the copper-coated steel wire includes at least two types of steel wires having different tensile strengths. 上記銅被覆鋼線が、400MPa以上の引張強度を有する請求項１０から１５いずれかに記載の撚線。   The stranded wire according to any one of claims 10 to 15, wherein the copper-coated steel wire has a tensile strength of 400 MPa or more. 請求項１０から１６いずれかに記載の撚線の周りに、絶縁被覆層を設けたことを特徴とする耐屈曲ケーブル。
A bend-resistant cable comprising an insulating coating layer around the stranded wire according to any one of claims 10 to 16.
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