JP2005259583A - Stranded wire conductor, its manufacturing method, and electric wire - Google Patents
Stranded wire conductor, its manufacturing method, and electric wire Download PDFInfo
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Abstract
Description
本発明は、複数の素線導体を撚り合わせた子撚導体を複数層に親撚りして形成された複合撚線の撚線導体、その製造方法及び電線に関する。 The present invention relates to a composite twisted wire conductor formed by twisting a plurality of strand conductors obtained by twisting a plurality of strand conductors, a method for manufacturing the same, and an electric wire.
自動車等の通電に用いられる電線として、複合撚線が広く用いられている。複合撚線は、複数本の素線導体を撚り合わせて（子撚りと呼ばれる）形成された子撚導体を複数本用意し、それらをさらに撚り合わせて（親撚りと呼ばれる）形成されたものである。子撚導体を構成する素線導体には、軟銅線等の導電性金属が用いられている。 Composite wires are widely used as electric wires used for energization of automobiles and the like. A composite stranded wire is formed by twisting a plurality of strand conductors (called a child twist) and preparing a plurality of child stranded conductors, and further twisting them (called a parent strand). is there. A conductive metal such as an annealed copper wire is used for the wire conductor constituting the child twisted conductor.
また、高電圧、大電流化の要求に応えるために、複数層にわたって親撚りが設けられた撚線導体も知られている（例えば、特許文献１参照）。親撚りが複数層設けられた撚線導体の一例を図６及び図７に示す。図６は便宜上複数層の親撚りを段階的に露呈させた撚線導体の斜視図であり、図７は撚線導体の各部材の撚り方向を示す断面模式図である。 In addition, in order to meet the demand for higher voltage and higher current, a stranded wire conductor in which a master strand is provided over a plurality of layers is also known (see, for example, Patent Document 1). An example of a stranded wire conductor provided with a plurality of layers of the main twist is shown in FIGS. FIG. 6 is a perspective view of a stranded wire conductor in which a plurality of layers of parent twists are exposed stepwise for convenience, and FIG. 7 is a schematic cross-sectional view showing the twist direction of each member of the stranded wire conductor.
図６及び図７に示す撚線導体５０は、複数本の素線導体を左撚りした子撚導体５１が中心に配置され、この子撚導体５１の周囲に、第１層の親撚り５３として、複数本の素線導体を左撚りした子撚導体５２が左撚りされている。さらに、第１層の親撚り５３の周囲に、第２層の親撚り５５として、複数本の素線導体を右撚りした子撚導体５４が右撚りされている。 6 and FIG. 7, a twisted strand conductor 51 in which a plurality of strand conductors are twisted to the left is arranged at the center, and a strand 1 of the first layer is formed around the twisted strand conductor 51. A child twisted conductor 52 obtained by left-twisting a plurality of strand conductors is left-twisted. Further, a child stranded conductor 54 obtained by right-twisting a plurality of strand conductors is right-twisted as a second-layer stranded 55 around the first-layer stranded 53.
ところで、自動車に配線された上記のような撚線導体は、自動車の走行時には、路面からの振動やエンジンで発生する振動を受ける。例えば、電気自動車のホイールインモータ用のリード線として用いられる場合には、特に路面から大きな振動を受けやすく、振動を吸収し得るように高い柔軟性が要求される。
従来、複合撚線の柔軟性を向上させようとする際には、素線導体径を変更したり、子撚りや親撚りの撚りピッチを変更したり、撚線導体の外被の材質や厚さを変更すること等を試みていた。
By the way, the above stranded wire conductors wired to the automobile are subjected to vibrations from the road surface and vibrations generated by the engine when the automobile is running. For example, when used as a lead wire for a wheel-in motor of an electric vehicle, high flexibility is required so that it is particularly susceptible to large vibrations from the road surface and can absorb the vibrations.
Conventionally, when trying to improve the flexibility of a composite stranded wire, the strand conductor diameter is changed, the twist pitch of the child strand or the parent strand is changed, the material or thickness of the outer sheath of the stranded wire conductor is changed. I was trying to change things.
しかしながら、撚線導体の電気特性や形状には様々な規定があり、用途によっても材質や形状は限られてしまうため、大きな構造変更を行うことはできない。そのため、上記の方法では柔軟性を向上させることは概ね困難であった。 However, there are various regulations on the electrical characteristics and shape of the stranded conductor, and the material and shape are limited depending on the application, so that a large structural change cannot be made. For this reason, it has been generally difficult to improve flexibility with the above method.
本発明は、複数の素線導体を撚り合わせた子撚導体を複数層に親撚りして形成された複合撚線の撚線導体において、良好な柔軟性を有する撚線導体、その製造方法及び電線を提供することを目的としている。 The present invention relates to a composite twisted wire conductor formed by twisting a plurality of strand conductors obtained by twisting a plurality of strand conductors, a twisted wire conductor having good flexibility, a method for producing the same, and The purpose is to provide electric wires.
上記目的を達成することのできる撚線導体は、複数本の素線導体を撚り合わせた複数本の子撚導体が、複数層に親撚りされた撚線導体であって、前記複数層のうち、少なくとも１組の隣り合う層の親撚り方向が同じであるものである。 The stranded wire conductor capable of achieving the above object is a stranded wire conductor in which a plurality of strand stranded conductors obtained by twisting a plurality of strand conductors are parent-twisted into a plurality of layers, and the The parent twist direction of at least one pair of adjacent layers is the same.
また、本発明に係る撚線導体において、前記複数層のうち、最外層と該最外層に隣接した層の親撚り方向が同じであることが好ましい。 Moreover, the twisted line | wire conductor which concerns on this invention WHEREIN: It is preferable that the parent twist direction of the outermost layer and the layer adjacent to this outermost layer is the same among the said several layers.
また、本発明に係る撚線導体において、前記複数層の全ての親撚り方向が同じであることが好ましい。 Moreover, in the stranded wire conductor according to the present invention, it is preferable that all the twisting directions of the plurality of layers are the same.
また、本発明に係る撚線導体において、前記子撚導体における前記素線導体の撚り方向が、前記隣り合う層の親撚り方向と逆であることが好ましい。 Moreover, the twisted wire conductor which concerns on this invention WHEREIN: It is preferable that the twist direction of the said strand conductor in the said child twist conductor is reverse to the parent twist direction of the said adjacent layer.
また、上記目的を達成することのできる本発明に係る電線は、上記本発明の撚線導体の周囲に、絶縁体の被覆が設けられているものである。 Moreover, the electric wire which concerns on this invention which can achieve the said objective is provided with the coating | cover of an insulator around the twisted-wire conductor of the said invention.
上記目的を達成することのできる撚線導体の製造方法は、複数本の素線導体を撚り合わせた複数本の子撚導体を、複数層に親撚りして撚線導体を製造する際に、少なくとも１組の隣り合う層を同じ方向に親撚りするものである。 The method for producing a stranded wire conductor capable of achieving the above object is to produce a stranded wire conductor by twisting a plurality of child twisted conductors obtained by twisting a plurality of strand conductors into a plurality of layers. At least one set of adjacent layers is twisted in the same direction.
本発明の撚線導体、その製造方法及び電線によれば、複数層の親撚りのうち、少なくとも１組の隣り合う層の親撚り方向が同じであるため、その隣り合った層の撚りの凹凸が互いになじみ、接触点の反発力が小さく抑えられる。これにより、撚線導体を曲げる際の抵抗力も小さく抑えられ、従来の複合撚線の撚線導体より柔軟性が向上しているため、配線時の振動を良好に吸収することができる。 According to the stranded wire conductor of the present invention, the manufacturing method thereof, and the electric wire, since the parent twist direction of at least one set of adjacent layers is the same among the multiple layers of the twisted twist, the unevenness of the twist of the adjacent layers. Are compatible with each other, and the repulsive force at the contact point is kept small. Thereby, the resistance at the time of bending a stranded wire conductor is also suppressed small, and since the flexibility is improved as compared with the stranded wire conductor of a conventional composite stranded wire, vibration during wiring can be absorbed well.
以下、本発明に係る撚線導体、その製造方法及び電線の実施の形態の例を、図面を参照して説明する。
図１及び図２に、本実施形態の撚線導体を示す。なお、図１は、撚線導体の構成を明確に示すために、便宜上複数層の親撚りを段階的に露呈させた状態の斜視図である。また、図２は、撚線導体の各部材の撚り方向を示す断面模式図である。なお、図２において、各部材の撚り方向を矢印にて示している。
Hereinafter, an example of an embodiment of a twisted wire conductor, a manufacturing method thereof, and an electric wire concerning the present invention is explained with reference to drawings.
1 and 2 show the stranded conductor of this embodiment. In addition, FIG. 1 is a perspective view of a state in which a plurality of layers of parent twists are exposed stepwise for the sake of clarity in order to clearly show the configuration of the stranded wire conductor. FIG. 2 is a schematic cross-sectional view showing the twisting direction of each member of the stranded conductor. In addition, in FIG. 2, the twist direction of each member is shown by the arrow.
図１及び図２に示すように、撚線導体１は、２層の親撚り構造を有する複合撚線であり、中央の軸線上に配置した子撚導体２の周囲に、６本の子撚導体３と１２本の子撚導体５をそれぞれ親撚りして形成されている。子撚導体２，３，５は、それぞれ複数本の導電性の素線導体を撚って形成したものであり、例えば本実施形態では、外径０．１８ｍｍの錫メッキ軟銅素線を４２本集合させて左撚り（Ｚ撚り）したものを用いている。 As shown in FIGS. 1 and 2, the stranded conductor 1 is a composite stranded wire having a two-layer parent stranded structure, and six stranded strands are disposed around the child stranded conductor 2 arranged on the central axis. The conductor 3 and the 12 child twisted conductors 5 are respectively formed by parent twisting. The child stranded conductors 2, 3, and 5 are each formed by twisting a plurality of conductive strand conductors. For example, in this embodiment, 42 tin-plated annealed copper strands having an outer diameter of 0.18 mm are formed. It is assembled and left twisted (Z twisted).
図１及び図２に示す撚線導体１を製造するには、まず、６本の子撚導体３を、中央の子撚導体２の周囲に右撚り（Ｓ撚り）に撚り合わせて配置し、これにより第１層の親撚り４を形成する。そして、この親撚り４の周囲に、１２本の子撚導体５を右撚りに撚り合わせて配置し、これにより第２層の親撚り６を形成する。 In order to manufacture the stranded wire conductor 1 shown in FIGS. 1 and 2, first, the six child twisted conductors 3 are arranged around the center child twisted conductor 2 in a right-handed twist (S twist). As a result, the first-layer parent twist 4 is formed. Then, twelve child twisted conductors 5 are twisted and arranged around the parent twist 4 so as to form a second layer parent twist 6.
このように、本実施形態の撚線導体１は、隣り合った第１層の親撚り４と第２層の親撚り６の親撚り方向が、共に同じ右撚りとして形成されている。隣り合う親撚り層の親撚り方向が同じであると、内側層の親撚り（第１層の親撚り４）の外周側に形成された撚線導体１の長手方向に沿った螺旋状の凹凸に対して、外側層の親撚り（第２層の親撚り６）の内周側に形成された螺旋状の凹凸が、干渉せずに空間を相補するように配置される。これにより、隣り合った親撚り間の接触箇所において発生する抗力（反発力）が小さく抑えられる。そして、撚線導体１の内部に存在する応力が従来の撚線導体より小さくなって柔軟性が向上し、撚線導体１を曲げる際の抵抗力も小さく抑えられる。したがって、撚線導体１に対して作用する振動等の外力を減衰させて吸収することができる。 As described above, the twisted wire conductor 1 of the present embodiment is formed such that the parent twist directions of the adjacent first layer parent twist 4 and second layer parent twist 6 are both the same right twist. Helical irregularities along the longitudinal direction of the stranded conductor 1 formed on the outer peripheral side of the inner layer parent twist (first layer parent twist 4) when adjacent parent twist layers have the same parent twist direction. On the other hand, the spiral irregularities formed on the inner peripheral side of the outer layer parent twist (second layer parent twist 6) are arranged so as to complement the space without interference. Thereby, the drag (repulsive force) which generate | occur | produces in the contact location between adjacent parent twist is suppressed small. And the stress which exists in the inside of the strand wire conductor 1 becomes smaller than the conventional strand wire conductor, a softness | flexibility improves, and the resistance force at the time of bending the strand wire conductor 1 is also restrained small. Therefore, external forces such as vibration acting on the stranded wire conductor 1 can be attenuated and absorbed.
また、本実施形態の撚線導体１は、子撚導体２，３，５の子撚り方向が、親撚り４，６の親撚り方向と逆である。このように、子撚り方向を親撚り方向と逆にすることにより、子撚導体２，３，５を構成する素線導体が若干撚り戻されて、撚線導体１の内部に存在する応力がさらに小さくなって柔軟性をより向上させることができる。 Further, in the stranded wire conductor 1 of the present embodiment, the child twist direction of the child twisted conductors 2, 3 and 5 is opposite to the parent twist direction of the parent twists 4 and 6. Thus, by reversing the strand twisting direction from the parent twisting direction, the strand conductors constituting the strand twisting conductors 2, 3, 5 are slightly twisted back, and the stress existing inside the twisted conductor 1 is reduced. Further reduction in flexibility can further improve flexibility.
また、撚線導体１は、その配線時には通常、図３に示すように、周囲に被覆１１が設けられており、電線１２としての形態をなしている。被覆１１は、絶縁体の樹脂であり、ポリエチレンやポリ塩化ビニル等を用いることができる。この被覆１１は、ダイスによる押し出し成形により形成されている。電線１２は、内部に存在する応力が小さくなり柔軟性が向上した撚線導体１を用いて構成されているため、被覆１１を通常と同様の樹脂材料を用いて通常の形状に形成しても、電線１２に対して作用する振動等の外力を良好に吸収することができる。 Moreover, as shown in FIG. 3, the stranded wire conductor 1 is usually provided with a coating 11 around the stranded wire conductor 1 as shown in FIG. The coating 11 is an insulating resin, and polyethylene, polyvinyl chloride, or the like can be used. This coating 11 is formed by extrusion molding with a die. Since the electric wire 12 is configured using the stranded wire conductor 1 in which the internal stress is reduced and the flexibility is improved, even if the coating 11 is formed into a normal shape using a resin material similar to a normal one. The external force such as vibration acting on the electric wire 12 can be absorbed well.
また、親撚りが２層より多く形成されている場合には、最外層の親撚りとその内側に隣接した層の親撚りが同一撚り方向であると良い。親撚りが複数層設けられている場合、１層あたりの子撚導体の数は外側に位置する層ほど多くなる。そのため、より外側の層において隣り合った層の親撚り方向を同じにすることで、上記の柔軟化の作用が効果的に得られやすい。 Moreover, when the parent twist is formed more than two layers, the parent twist of the outermost layer and the parent twist of the layer adjacent to the inner side are preferably in the same twist direction. In the case where a plurality of parent twists are provided, the number of child twist conductors per layer increases as the layer is located on the outer side. Therefore, by making the parent twist direction of the adjacent layers in the outer layer the same, it is easy to effectively obtain the above-described softening action.
図４に示す撚線導体１０は、図１及び図２に示した撚線導体１の周囲に、第３層の親撚りとして１８本の子撚導体７が右撚りに撚り合わされたものである。この撚線導体１０は、３層の親撚りのうち、最外層とその隣接した内側の層のみならず、全ての層の親撚り方向が同じである。したがって、この撚線導体１０では全ての親撚り層の間で抗力が小さく抑えられ、太径の撚線導体でありながら良好な柔軟性を有している。 The stranded wire conductor 10 shown in FIG. 4 is one in which 18 child stranded conductors 7 are twisted in a right-hand twist around the stranded wire conductor 1 shown in FIGS. . In the stranded conductor 10, not only the outermost layer and the inner layer adjacent to the outermost layer among the three layers of the parent twist, but the parent twist directions of all layers are the same. Therefore, in the stranded wire conductor 10, the drag is suppressed to be small between all the parent stranded layers, and the stranded wire conductor 10 has a good flexibility while being a large diameter stranded wire conductor.
以上説明したように、本実施形態の撚線導体、その製造方法、及び電線によれば、隣り合う親撚り層の親撚り方向を同じとすることで、素線導体径の変更や撚りピッチの変更等を行うことなく、撚線導体や電線の柔軟性を向上させることができる。 As described above, according to the stranded wire conductor of the present embodiment, the manufacturing method thereof, and the electric wire, it is possible to change the strand conductor diameter or twist pitch by making the parent stranded direction of adjacent parent stranded layers the same. The flexibility of the stranded wire conductor and the electric wire can be improved without making a change or the like.
図１及び図２に示したような、２層の親撚りの親撚り方向が同じである撚線導体を製造し、その柔軟性を評価するために折り曲げ試験を行った。また、隣り合う親撚り方向が逆である従来の撚線導体についても同様に折り曲げ試験を行い、本発明の撚線導体と比較した。
なお、この折り曲げ試験は、子撚り及び親撚りの撚りピッチが異なる２種類の撚線導体について行った。
As shown in FIGS. 1 and 2, a twisted wire conductor having the same parent twist direction of two layers of the twist was manufactured, and a bending test was performed in order to evaluate its flexibility. Moreover, the bending test was similarly performed about the conventional twisted-wire conductor with which the adjacent parent twist direction is reverse, and it compared with the twisted-wire conductor of this invention.
In addition, this bending test was done about two types of twisted-wire conductors from which the twist pitch of a child twist and a parent twist differs.
折り曲げ試験は、図５に示すように、所定の長さの撚線導体１をＵ字状に曲げて一組の板材２０，２１の間に挟み、一方の板材２０を他方の板材２１に向けて接近させて撚線導体１をさらに折り曲げ、その際の反発力をモニターして行った。今回の試験では、試験開始時の撚線導体１の曲率半径を４０ｍｍとし、その状態から曲率半径が２０ｍｍになるまで曲げ、その反発力を折り曲げ力として評価した。なお、板材２０，２１を接近させて撚線導体１を折り曲げる速度は、５０ｍｍ／分とした。 In the bending test, as shown in FIG. 5, a stranded wire conductor 1 having a predetermined length is bent in a U shape and sandwiched between a pair of plate members 20, 21, and one plate member 20 faces the other plate member 21. The twisted conductor 1 was further bent and the repulsive force at that time was monitored. In this test, the radius of curvature of the stranded conductor 1 at the start of the test was set to 40 mm, and bending was performed from that state until the radius of curvature became 20 mm, and the repulsive force was evaluated as the bending force. In addition, the plate material 20 and 21 was made to approach, and the speed | rate which bends the twisted conductor 1 was 50 mm / min.
この試験結果を、表１に示す。
まず、子撚りの撚りピッチを３０ｍｍとした、実施例Ａ及び比較例Ａの折り曲げ力を比較する。隣り合う親撚りを同一の親撚り方向とした実施例Ａは、折り曲げ力が１．０６（ｋｇｆ）であり、親撚り方向が異なる比較例Ａは、１．５５（ｋｇｆ）であった。実施例Ａの撚線導体は、比較例Ａの撚線導体に比べて３２％程度折り曲げ力が小さくなっていた。 First, the bending forces of Example A and Comparative Example A, in which the twist pitch of the child twist is 30 mm, are compared. In Example A in which adjacent parent twists were in the same parent twist direction, the bending force was 1.06 (kgf), and Comparative Example A having a different parent twist direction was 1.55 (kgf). The stranded wire conductor of Example A had a bending force reduced by about 32% compared to the stranded wire conductor of Comparative Example A.
次に、子撚りの撚りピッチを６０ｍｍとした、実施例Ｂ及び比較例Ｂの折り曲げ力を比較する。隣り合う親撚りを同一の親撚り方向とした実施例Ｂは、折り曲げ力が１．３４（ｋｇｆ）であり、親撚り方向が異なる比較例Ｂは、２．２５（ｋｇｆ）であった。実施例Ｂの撚線導体は、比較例Ｂの撚線導体に比べて４０％程度折り曲げ力が小さくなっていた。 Next, the bending forces of Example B and Comparative Example B, in which the twist pitch of the child twist is 60 mm, are compared. In Example B in which the adjacent parent twists were in the same parent twist direction, the bending force was 1.34 (kgf), and Comparative Example B having a different parent twist direction was 2.25 (kgf). The twisted conductor of Example B had a bending force that was about 40% smaller than that of Comparative Example B.
以上の試験結果から、何れの撚りピッチの撚線導体においても、隣り合う親撚り方向を同じとすることで柔軟性が向上することが確認できた。 From the above test results, it was confirmed that the flexibility was improved by making the adjacent parent twist directions the same in the twisted conductors of any twist pitch.
図４に示したような、親撚りが３層である撚線導体を製造し、その柔軟性を評価するために上記実施例と同様の折り曲げ試験を行った。本発明に係る撚線導体の実施例としては、隣り合う親撚り方向が３層全てで同一方向である撚線導体（実施例Ｃ）と、隣り合う親撚り方向が第２層と第３層で同一方向の右撚りである撚線導体（実施例Ｄ）と、隣り合う親撚り方向が第１層と第２層で同一方向の左撚りである撚線導体（実施例Ｅ）と、隣り合う親撚り方向が第１層と第２層で同一方向の右撚りである撚線導体（実施例Ｆ）とを用意し、試験した。また、隣り合う親撚り方向が全て逆である従来の撚線導体（比較例Ｃ）についても同様に折り曲げ試験を行い、実施例Ｃ〜Ｆの撚線導体と比較した。 As shown in FIG. 4, a twisted conductor having three layers of parent twist was manufactured, and the same bending test as in the above example was performed in order to evaluate the flexibility. As an example of the stranded wire conductor according to the present invention, the stranded wire conductor (Example C) in which the adjacent parent twist directions are the same in all three layers, and the adjacent parent twist direction are the second layer and the third layer. And a twisted wire conductor (Example D) that is right-handed in the same direction, a twisted-wire conductor (Example E) that is adjacent in the same direction in the first layer and the second layer, and a neighboring twisted wire conductor (Example E). A twisted wire conductor (Example F) in which the matching parent twist direction is the right twist in the same direction in the first layer and the second layer was prepared and tested. Moreover, the bending test was done similarly about the conventional twisted-wire conductor (comparative example C) which all the adjacent parent twist directions are reverse, and compared with the twisted-wire conductor of Example CF.
この試験結果を、表２に示す。なお、この表中、折り曲げ力の欄に示した数値は、比較例Ｃの折り曲げ力を基準として比較した割合を示すものである。
隣り合う親撚り方向が全て逆である比較例Ｃに対して、少なくとも１組の隣り合う層の親撚り方向が同じである実施例Ｃ〜Ｆは、何れも折り曲げ力が小さくなっている。特に、全ての親撚り方向が同一である実施例Ｃは、最も折り曲げ力が小さい。また、最外層である第３層とその内側に隣接した第２層の親撚り方向が同じである実施例Ｄが、実施例Ｃに次いで折り曲げ力が小さい。また、第１層と第２層の親撚り方向が同じである実施例Ｅ，Ｆについては、子撚りと親撚りの方向が逆である実施例Ｆの方が折り曲げ力が小さくなっている。 Compared to Comparative Example C in which the adjacent twisting directions are all opposite, Examples C to F in which the parent twisting direction of at least one pair of adjacent layers is the same have a small bending force. In particular, Example C, in which all the twisting directions are the same, has the smallest bending force. In addition, Example D in which the parent twist direction of the third layer, which is the outermost layer, and the second layer adjacent to the inside of the third layer is the same as Example C has the smallest bending force. Further, for Examples E and F in which the first layer and the second layer have the same parent twist direction, the bending force is smaller in Example F in which the child twist and the parent twist directions are opposite.
１，１０ 撚線導体
２，３，５ 子撚導体
４ 第１層の親撚り
６ 第２層の親撚り
７ 第３層の親撚り
１１ 被覆
１２ 電線
DESCRIPTION OF SYMBOLS 1,10 Twisted wire conductor 2,3,5 Child twisted conductor 4 First layer parent twist 6 Second layer parent twist 7 Third layer parent twist 11 Cover 12 Electric wire
Claims (6)
前記複数層のうち、少なくとも１組の隣り合う層の親撚り方向が同じである撚線導体。 A plurality of child twisted conductors obtained by twisting a plurality of strand conductors are twisted conductors in which a plurality of layers are parent-twisted,
A twisted wire conductor in which at least one pair of adjacent layers among the plurality of layers has the same parent twist direction.
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| JP2004070970A JP2005259583A (en) | 2004-03-12 | 2004-03-12 | Stranded wire conductor, its manufacturing method, and electric wire |
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