WO2015053208A1 - 圧着端子 - Google Patents

圧着端子 Download PDF

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Publication number
WO2015053208A1
WO2015053208A1 PCT/JP2014/076661 JP2014076661W WO2015053208A1 WO 2015053208 A1 WO2015053208 A1 WO 2015053208A1 JP 2014076661 W JP2014076661 W JP 2014076661W WO 2015053208 A1 WO2015053208 A1 WO 2015053208A1
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WO
WIPO (PCT)
Prior art keywords
core wire
crimping
crimp terminal
wire
end side
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Application number
PCT/JP2014/076661
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English (en)
French (fr)
Inventor
準弥 篠原
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矢崎総業株式会社
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Publication of WO2015053208A1 publication Critical patent/WO2015053208A1/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/188—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping having an uneven wire-receiving surface to improve the contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors

Definitions

  • the present invention relates to a crimp terminal for connecting to an electric wire.
  • Patent Document 1 There is one disclosed in Patent Document 1 as a conventional crimp terminal of this type.
  • the electric wire W connected to the crimp terminal 110 of the conventional example includes a core wire 101 composed of a plurality of strands 101 a and an insulating sheath 102 covering the outer periphery of the core wire 101.
  • the insulating sheath 102 is removed, and the core wire 101 is exposed.
  • the crimp terminal 110 includes a mating terminal connection portion 111 and a wire connection portion 115.
  • the wire connection portion 115 includes a core wire crimping portion 116 and an outer skin crimping portion 117.
  • the core wire crimping part 116 includes a base part 116a and a pair of caulking piece parts 116b extending from both sides of the base part 116a.
  • Three long grooves (serrations) 118 are formed on the inner surfaces of the base portion 116 a and the pair of caulking pieces 116 b of the core wire crimping portion 116.
  • the outer skin crimping part 117 includes a base part 117a and a pair of caulking piece parts 117b extending from both sides of the base part 117a.
  • the crimp terminal 110 crimps and crimps the core wire 101 exposed by the core wire crimping portion 116, and crimps and crimps the insulating sheath 102 by the outer skin crimping portion 117.
  • JP 2009-123623 A JP 2009-123623 A
  • the crimping is performed by pressing the pair of core wire crimping pieces 116b with a crimping jig (not shown) and plastically deforming the pair of crimping pieces 116b.
  • the core wire 101 receives a crimping force from the core wire caulking piece portion 116b.
  • the core wire 101 can freely extend in either the left or right direction (a arrow direction and b arrow direction in FIG. 9).
  • the core wire 101 located on the distal end side of the core wire crimping piece portion 116b extends to the distal end side (direction of arrow a in FIG.
  • the core wire 101 positioned extends to the rear end side (insulating outer skin side) (in the direction of arrow b in FIG. 9).
  • the core wire 101 freely expands and contracts, the crimping force does not effectively act on each strand 101a of the core wire 101.
  • the strand 101a generates a new surface when it extends, it receives only a low compressive force, so that no adhesion occurs, or even if it occurs, adhesion is not promoted. And when adhesion is insufficient, there existed a problem that the electrical connection characteristic between the strands 101a did not improve, and the electrical resistance of an electrical connection location became high.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a crimp terminal that can reduce the electrical resistance at an electrical connection location with an electric wire.
  • a crimp terminal includes a core wire crimping portion that can be crimped to a core wire composed of a plurality of strands of an electric wire, and at least one notch portion is provided at an intermediate position in the axial direction of the core wire of the core wire crimping portion. It is done.
  • the notch portion may be provided at a position closer to the tip side of the core wire than the center of the core wire crimping portion in the axial direction of the core wire.
  • the notch may be provided at a plurality of locations.
  • a crimping force acts on the core wire in the caulking process of the core wire crimping portion, so that a new surface is generated when each strand extends. Further, in the caulking process of the core wire crimping portion, the core wire bites into both edges of the notch portion of the core wire crimping portion, so that a portion where the core wire is prevented from being stretched is generated, and a portion where the compressive force acts efficiently on the core wire is generated. That is, the generation of a new surface due to the elongation of each strand and the occurrence of adhesion due to the efficient compression force acting on each strand improves the conduction characteristics between the strands. From the above, the electrical resistance at the electrical connection point is reduced.
  • FIG. 1 is a perspective view showing a state before an electric wire is crimped to a crimp terminal according to the first embodiment.
  • Fig.2 (a) is a side view which shows the state after crimping
  • FIG.2 (b) is a principal part enlarged view of Fig.2 (a).
  • 3 is a cross-sectional view taken along line AA in FIG.
  • FIG. 4 is a perspective view of a crimping jig used for crimping the crimp terminal according to the first embodiment.
  • FIG. 5 is a side view for explaining the caulking work by the caulking jig.
  • FIG. 5 is a side view for explaining the caulking work by the caulking jig.
  • FIG. 6 is a perspective view showing a state before the electric wire is crimped to the crimp terminal according to the second embodiment.
  • Fig.7 (a) is a side view which shows the state after crimping
  • FIG.7 (b) is a principal part enlarged view of Fig.7 (a).
  • FIG. 8 is a perspective view of a state before a wire is crimped to a conventional crimp terminal.
  • FIG. 9 is a side view of a state after a wire is crimped to a crimp terminal of a conventional example.
  • the electric wire W includes a core wire 1 composed of a plurality of strands 1 a and an insulating sheath 2 that covers the outer periphery of the core wire 1. At the tip end side of the electric wire W, the insulating sheath 2 is removed, and the core wire 1 is exposed.
  • the core wire 1 is composed of a large number of strands 1a made of aluminum or aluminum alloy (hereinafter referred to as aluminum), and the numerous strands 1a are twisted together. That is, the electric wire W is an aluminum electric wire.
  • the crimp terminal 10A is made of, for example, a copper alloy, and is formed by bending a plate cut into a predetermined shape.
  • the crimp terminal 10 ⁇ / b> A includes a mating terminal connection portion 11 and a wire connection portion 15.
  • the wire connection portion 15 includes a core wire crimping portion 16 and an outer skin crimping portion 17.
  • the core wire crimping portion 16 includes a base portion 16a and a pair of caulking piece portions 16b extending from both sides of the base portion 16a. A large number of round grooves 18 are formed on the inner surfaces of the base portion 16a and the pair of caulking piece portions 16b of the core wire crimping portion 16.
  • Each caulking piece portion 16b is provided with one notch portion 19 at an intermediate position in the axial direction of the core wire 1.
  • the notch 19 is provided at a position closer to the distal end side of the core wire 1 than the center position C1 (see FIG. 2B) in the core axis direction of each crimping piece 16b.
  • the outer skin crimping portion 17 includes a base portion 17a and a pair of caulking piece portions 17b extending from both sides of the base portion 17a.
  • the crimp terminal 10A crimps and crimps the core wire 1 exposed by the core wire crimping portion 16, and crimps and crimps the insulating sheath 2 by the outer skin crimping portion 17.
  • the crimp terminal 10A is crimped by a crimping jig 20 shown in FIG.
  • the caulking jig 20 has a caulking groove 21 having a final caulking outer peripheral shape on the caulking tip side.
  • FIG. 5 when the pair of core wire crimping pieces 16 b are pressed from above by the crimping jig 20, the pair of crimping pieces 16 b are plastically deformed along the crimping grooves 21.
  • the core wire 1 since the core wire 1 receives a crimping force from the core wire crimping portion 16, a new surface is generated when each strand 1a extends. Further, in the caulking process of the core wire crimping portion 16, the core wire 1 bites into both edges of the notch portion 19 of the core wire crimping portion 16, so that a portion where the elongation of the core wire 1 is suppressed occurs, and the core wire 1 is efficiently compressed. The place which acts is produced.
  • the core wire 1 starts from the edge e1 on the distal end side of the core wire 1, and the core wire portion E1 on the distal end side from this has a compressive force due to the caulking force. 1 can be extended to the front end side (in the direction of arrow a in FIG. 2B).
  • the edge e2 on the rear end side of the core wire 1 as a starting point, at the core wire portion E2 on the rear end side from this, the rear end side of the core wire 1 (in the direction of arrow b in FIG. 2 (b)) due to the compressive force of the caulking force.
  • the extension to the front end side of the core wire 1 (a arrow direction in FIG. 2B) is suppressed.
  • adhesion occurs due to the generation of a new surface due to the extension of each strand 1a and the effective compression force acting on each strand 1a.
  • the conduction characteristics are improved. From the above, the electrical resistance at the electrical connection point is reduced.
  • the conduction characteristics of the core wire 1 at the electrical connection location can be improved. Can be reduced.
  • the notch portion 19 is provided not at the center C1 of the core wire crimping portion 16 in the core wire axial direction but at a position closer to the tip side of the core wire 1 than the center C1.
  • a groove (serration) 18 is provided on the inner surface of the core wire crimping portion 16. For this reason, since the element wire 1a of the core wire 1 is deformed so as to enter the groove 18, that is, stretched and deformed, a new surface is generated and adhesion occurs due to receiving a compressive force. And the conduction resistance between the strands 1a are reduced. This also makes it possible to reduce the electrical resistance at the electrical connection point.
  • Core wire 1 is made of aluminum.
  • the aluminum strand 1a has a thicker oxide film on the surface than the copper alloy.
  • the aluminum core wire 1 has a problem of an increase in electrical resistance due to the conduction resistance between the strands 1a.
  • the crimp terminal 10A according to the first embodiment is particularly effective for an aluminum electric wire because the conduction resistance between the strands 1a can be reduced.
  • the aluminum core wire 1 is softer and easier to stretch than the copper alloy product, but for the reasons described above, the compressive force due to crimping of the core wire crimping portion 16 can be efficiently applied to the core wire 1. For this reason, the crimp terminal 10A according to the first embodiment is particularly effective for an aluminum electric wire from this viewpoint.
  • the crimp terminal 10B according to the second embodiment includes a pair of core wire crimp parts 16 with a first notch part 19a and a second notch part 19b spaced apart from each other. The point provided is different. And the 1st notch part 19a of the front end side is provided in the position of the front end side of the core wire 1 rather than the center position C1 (refer FIG.7 (b)) of the core piece axial direction of each crimping piece part 16b.
  • the core wire 1 receives the crimping force from the core wire crimping portion 16. Then, as in the first embodiment, the core wire 1 bites into both edges of the first cutout portion 19a and the second cutout portion 19b of each core wire crimping piece portion 16b. For this reason, even if compressive force acts on the core wire 1 by the core wire crimping part 16, the core wire 1 cannot freely extend to the front end side or the rear end side, and the extension of the core wire 1 is suppressed.
  • the leading end side edge e1 of the core wire 1 is the starting point, and the leading end side core wire portion E1 has a compressive force due to the caulking force. It can extend to the tip end side of the core wire 1 (a arrow direction in FIG. 7B).
  • the core wire portion E2 on the rear end side from this is the rear end side of the core wire 1 by the compressive force of the caulking force (in the direction of arrow b in FIG. 7B).
  • extension to the front end side of the core wire 1 is suppressed.
  • the rear end also on the tip side of the core wire 1 (in the direction of arrow a in FIG. 7 (b)) by the compression force due to the caulking force Extension to the side (in the direction of arrow b in FIG. 7B) is also suppressed.
  • the core wire 1 of the core wire portion E2 on the rear end side is being restrained by the compressive force, the core wire 1 is stretched. The compression force works efficiently.
  • the core wire 1 of the core wire portion E3 at the intermediate position is sufficiently restrained from being stretched by the compressive force due to the caulking force, but a new surface is generated by sliding (friction) between the strands 1a due to the compressive force, and The compression force works most efficiently. That is, the wire 1a on which the new surface is generated slides to cause adhesion, and the conduction characteristics between the wires 1 are improved.
  • the range to adhere is expanded and the electrical resistance of an electrical connection location further reduces.
  • each crimping piece portion 16b of the core wire crimping portion 16 is provided with the first cutout portion 19a and the second cutout portion 19b at two locations, but may be provided with three or more cutout portions.
  • the core wire 1 is made of aluminum, but the present invention can also be applied to a core wire 1 other than aluminum (for example, made of copper alloy).
  • the serration provided on the inner surface of the core wire crimping portion 16 is the groove 18, but it may be a protrusion, or may be both a groove and a protrusion.
  • a crimp terminal in which a new surface is generated due to the elongation of each strand of the electric wire, and adhesion is generated by an efficient compression force acting on each strand, and the conduction characteristics between the strands are improved. Can be provided.

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

　圧着端子（１０Ａ）は、電線（Ｗ）の複数の素線（１ａ）からなる芯線（１）に圧着可能な芯線圧着部（１６）を備える。芯線圧着部（１６）には、芯線（１）の軸方向の中間位置に切欠部（１９）が設けられる。

Description

圧着端子
　本発明は、電線に接続するための圧着端子に関する。
　この種の従来例の圧着端子として、特許文献１に開示されたものがある。図８、９に示すように、従来例の圧着端子１１０に接続される電線Ｗは、複数の素線１０１ａからなる芯線１０１と、芯線１０１の外周を覆う絶縁外皮１０２とを備える。電線Ｗの先端側は、絶縁外皮１０２が除去されて、芯線１０１が露出されている。
　圧着端子１１０は、相手端子接続部１１１と、電線接続部１１５とを備える。電線接続部１１５は、芯線圧着部１１６と、外皮圧着部１１７とを備える。芯線圧着部１１６は、基底部１１６ａと、この基底部１１６ａの両側から延設された一対の加締め片部１１６ｂとを備える。芯線圧着部１１６の基底部１１６ａと一対の加締め片部１１６ｂの内面には、三本の長溝（セレーション）１１８が形成されている。外皮圧着部１１７は、基底部１１７ａと、この基底部１１７ａの両側から延設された一対の加締め片部１１７ｂとを備える。
　圧着端子１１０は、芯線圧着部１１６によって露出された芯線１０１を加締め圧着し、外皮圧着部１１７によって絶縁外皮１０２を加締め圧着している。
特開２００９－１２３６２３号公報(JP 2009-123623 A)
　ところで、加締め圧着は、加締め治具（不図示）で一対の芯線加締め片部１１６ｂを押圧し、一対の加締め片部１１６ｂを塑性変形することにより行う。この加締め過程では、芯線加締め片部１１６ｂより芯線１０１が圧着力を受ける。すると、図９に示すように、芯線１０１が左右いずれの方向（図９のａ矢印方向とｂ矢印方向）にも自由に伸びることができる。一般的には、芯線加締め片部１１６ｂの先端側に位置する芯線１０１は、先端側（図９のａ矢印方向）に伸び、芯線加締め片部１１６ｂの後端側（絶縁外皮側）に位置する芯線１０１は、後端側（絶縁外皮側）（図９のｂ矢印方向）に伸びる。
　このように、芯線１０１が自由に伸び、縮径するため、圧着力が有効に芯線１０１の各素線１０１ａに作用しない。素線１０１ａは、伸びることによって新生面を発生するものの、低い圧縮力しか受けないため、凝着が発生しない、若しくは、発生しても凝着が促進されない。そして、凝着が不足すると、素線１０１ａ間の導通特性が向上せず、電気接続箇所の電気抵抗が高くなるという問題があった。
　本発明は、上述した課題を解決すべくなされたものであり、電線との電気接続箇所における電気抵抗を低減できる圧着端子を提供することを目的とする。
　本発明の態様に係る圧着端子は、電線の複数の素線からなる芯線に圧着可能な芯線圧着部を備え、芯線圧着部の芯線の軸方向の中間位置には、少なくとも１つの切欠部が設けられる。
　切欠部は、芯線圧着部の芯線の軸方向の中央よりも前記芯線の先端側の位置に設けられたものであってもよい。切欠部は、複数箇所に設けられたものであってもよい。
　本発明の態様係る圧着端子によれば、芯線圧着部の加締め過程では、芯線に圧着力が作用するため、各素線が伸びることによって新生面が発生する。又、芯線圧着部の加締め過程では、芯線圧着部の切欠部の両エッジに芯線が食い込むため、芯線の伸びが抑制される箇所が生じ、芯線に圧縮力が効率良く作用する箇所が生じる。つまり、各素線の伸びによる新生面の発生と、各素線に効率良く圧縮力が作用することによって凝着が発生し、素線間の導通特性が向上する。以上より、電気接続箇所の電気抵抗が低減する。
図１は、第１実施形態に係る圧着端子に電線を圧着する前の状態を示す斜視図である。 図２（ａ）は第１実施形態に係る圧着端子に電線を圧着した後の状態を示す側面図、図２（ｂ）は図２（ａ）の要部拡大図である。 図３は、図２のＡ－Ａ線断面図である。 図４は、第１実施形態に係る圧着端子を圧着するために用いる加締め治具の斜視図である。 図５は、加締め治具による加締め作業を説明する側面図である。 図６は、第２実施形態に係る圧着端子に電線を圧着する前の状態を示す斜視図である。 図７（ａ）は第２実施形態に係る圧着端子に電線を圧着した後の状態を示す側面図、図７（ｂ）は図７（ａ）の要部拡大図である。 図８は、従来例の圧着端子に電線を圧着する前の状態の斜視図である。 図９は、従来例の圧着端子に電線を圧着した後の状態の側面図である。
　以下、実施形態に係る圧着端子を図面に基づいて説明する。
（第１実施形態）
　図１―５を用いて、第１実施形態を説明する。図１―３に示すように、電線Ｗは、複数の素線１ａからなる芯線１と、芯線１の外周を覆う絶縁外皮２とを備える。電線Ｗの先端側は、絶縁外皮２が除去されて、芯線１が露出されている。芯線１は、アルミニウム製又はアルミニウム合金製（以下、アルミ製）の多数の素線１ａから成り、多数の素線１ａが互いに撚られている。つまり、電線Ｗは、アルミ電線である。
　圧着端子１０Ａは、例えば、銅合金製であり、所定形状に裁断したプレートを折り曲げ加工することによって形成されている。圧着端子１０Ａは、相手端子接続部１１と、電線接続部１５とを備える。電線接続部１５は、芯線圧着部１６と、外皮圧着部１７とを備える。芯線圧着部１６は、基底部１６ａと、この基底部１６ａの両側から延設された一対の加締め片部１６ｂとを備える。芯線圧着部１６の基底部１６ａと一対の加締め片部１６ｂの内面には、多数の丸形状の溝（セレーション）１８が形成されている。各加締め片部１６ｂには、芯線１の軸方向の中間位置に切欠部１９が一箇所設けられている。切欠部１９は、各加締片部１６ｂの芯線軸方向の中心位置Ｃ１（図２（ｂ）参照）よりも芯線１の先端側の位置に設けられている。
　外皮圧着部１７は、基底部１７ａと、この基底部１７ａの両側から延設された一対の加締め片部１７ｂとを備える。
　圧着端子１０Ａは、芯線圧着部１６によって露出された芯線１を加締め圧着し、外皮圧着部１７によって絶縁外皮２を加締め圧着している。
　圧着端子１０Ａは、図４に示す加締め治具２０によって圧着される。加締め治具２０は、その加締め先端側に最終的な加締め外周形状の加締め溝２１を有する。図５に示すように、加締め治具２０によって一対の芯線加締め片部１６ｂを上方から押圧すると、加締め溝２１に沿って一対の加締め片部１６ｂが塑性変形される。
　この加締め過程では、芯線圧着部１６より芯線１が圧着力を受けるため、各素線１ａが伸びることによって新生面が発生する。又、芯線圧着部１６の加締め過程では、芯線圧着部１６の切欠部１９の両エッジに芯線１が食い込むため、芯線１の伸びが抑制される箇所が生じ、芯線１に圧縮力が効率良く作用する箇所が生じる。
　具体的には、第１実施形態では、図２（ｂ）に示すように、芯線１の先端側のエッジｅ１を起点としてこれより先端側の芯線箇所Ｅ１では、加締め力による圧縮力で芯線１の先端側（図２（ｂ）のａ矢印方向）に伸びることができる。一方、芯線１の後端側のエッジｅ２を起点としてこれより後端側の芯線箇所Ｅ２では、加締め力による圧縮力で芯線１の後端側（図２（ｂ）のｂ矢印方向）に伸びることができるものの、芯線１の先端側（図２（ｂ）のａ矢印方向）への伸びが抑制される。換言すれば、後端側の芯線箇所Ｅ２では、各素線１ａの伸びによる新生面の発生と、各素線１ａに効率良く圧縮力が作用することによって凝着が発生し、素線１間の導通特性が向上する。以上より、電気接続箇所の電気抵抗が低減する。
　このように圧着端子１０Ａの一部を設計変更することによって、電気接続箇所における芯線１の導通特性を向上させることができるため、単線化等に較べてほとんどコストアップなしに電気接続箇所の電気抵抗を低減することができる。
　切欠部１９は、芯線圧着部１６の芯線軸方向の中心Ｃ１ではなく、中心Ｃ１よりも芯線１の先端側の位置に設けられている。これにより、後端側の芯線箇所Ｅ２が先端側の芯線箇所Ｅ１よりも長くなり、新生面が発生し、且つ、圧縮力が効率良く作用する範囲を広くできる。従って、凝着の発生範囲を広くでき、素線１間の導通特性の向上を図ることができる。
　芯線圧着部１６の内面には、溝（セレーション）１８が設けられている。このため、芯線１の素線１ａが溝１８に入り込むよう変形、つまり、伸び変形するため、新生面が発生し、圧縮力を受けることなどによって凝着が発生するため、芯線１と芯線圧着部１６との間の導通抵抗の低減になると共に素線１ａ間の導通抵抗の低減になる。これによっても、電気接続箇所の電気抵抗の低減を図ることができる。
　芯線１は、アルミ製である。アルミ製の素線１ａは、銅合金製に較べて表面にできる酸化被膜が厚い。そのため、アルミ製の芯線１は、素線１ａ間の導通抵抗による電気抵抗の増加が問題であった。しかし、第１実施形態に係る圧着端子１０Ａでは、素線１ａ間の導通抵抗を低減できるため、特にアルミ電線に有効である。アルミ製の芯線１は、銅合金製に較べて柔らかくて伸び易いが、上記した理由によって、芯線圧着部１６の加締め圧着による圧縮力が芯線１に効率良く作用させることができる。このため、第１実施形態に係る圧着端子１０Ａは、この観点からも特にアルミ電線に有効である。
（第２実施形態）
　図６、７を用いて、第２実施形態を説明する。第２実施形態に係る圧着端子１０Ｂは、第１実施形態に係る圧着端子１０Ａと比較して、一対の芯線圧着部１６に第１切欠部１９ａと第２切欠部１９ｂとが間隔を置いて二箇所設けられている点が相違する。そして、先端側の第１切欠部１９ａは、各加締片部１６ｂの芯線軸方向の中心位置Ｃ１（図７（ｂ）参照）よりも芯線１の先端側の位置に設けられている。
　他の構成は、前記第１実施形態と同一であるため、同一構成箇所には同一符号を付してその説明を省略する。
　上記構成において、芯線圧着部１６の加締め過程では、芯線圧着部１６より芯線１が圧着力を受ける。すると、前記第１実施形態と同様に、各芯線加締め片部１６ｂの第１切欠部１９ａと第２切欠部１９ｂの各両エッジに芯線１が食い込む。このため、芯線圧着部１６によって芯線１に圧縮力が作用しても、芯線１が自由に先端側や後端側に伸びることができず、芯線１の伸びが抑制される。
　具体的には、第２実施形態では、図７（ｂ）に示すように、芯線１の先端側のエッジｅ１を起点として、これより先端側の芯線箇所Ｅ１では、加締め力による圧縮力で芯線１の先端側（図７（ｂ）のａ矢印方向）に伸びることができる。一方、芯線１の最も後端側のエッジｅ２を起点としてこれより後端側の芯線箇所Ｅ２では、加締め力による圧縮力で芯線１の後端側（図７（ｂ）のｂ矢印方向）に伸びることができるものの、芯線１の先端側（図７（ｂ）のａ矢印方向）への伸びが抑制される。又、第１切欠部１９ａと第２切欠部１９ｂの間に位置する芯線箇所Ｅ３では、加締め力による圧縮力で芯線１の先端側（図７（ｂ）のａ矢印方向）にも後端側（図７（ｂ）のｂ矢印方向）にも伸びることが抑制される。換言すれば、後端側の芯線箇所Ｅ２の芯線１は、圧縮力によって抑制されつつではあるが伸びるために、芯線１に新生面が発生し、且つ、伸びが抑制されることによって、芯線１には圧縮力が効率良く作用する。又、中間位置の芯線箇所Ｅ３の芯線１は、加締め力による圧縮力によって伸びが十分に抑制されるものの、圧縮力による素線１ａ間の摺動（摩擦）によって新生面が発生し、且つ、圧縮力が最も効率良く作用する。つまり、新生面が発生した素線１ａ間が摺動して凝着が発生し、素線１間の導通特性が向上する。第２実施形態では、凝着する範囲が拡大し、電気接続箇所の電気抵抗が更に低減する。
　第２実施形態では、芯線圧着部１６の各加締片部１６ｂには２箇所に第１切欠部１９ａと第２切欠部１９ｂを設けたが、３箇所以上に切欠部を設けても良い。
（変形例）
　各実施形態では、芯線１がアルミ製であるが、アルミ製以外の芯線１（例えば銅合金製）であっても適用できる。
　各実施形態では、芯線圧着部１６の内面に設けるセレーションは、溝１８であるが、突部でも良く、又、溝と突部の両方であっても良い。
　本発明によれば、電線の各素線の伸びによる新生面の発生と、各素線に効率良く圧縮力が作用することによって凝着が発生し、素線間の導通特性が向上する圧着端子を提供することができる。

Claims (3)

  1. 　圧着端子であって、
    　電線の複数の素線からなる芯線に圧着可能な芯線圧着部を備え、
    　前記芯線圧着部の前記芯線の軸方向の中間位置には、少なくとも１つの切欠部が設けられる
    ことを特徴とする圧着端子。
  2. 　請求項１に記載の圧着端子であって、
    　前記切欠部は、前記芯線圧着部の前記芯線の軸方向の中央よりも前記芯線の先端側の位置に設けられることを特徴とする圧着端子。
  3. 　請求項１又は２に記載の圧着端子であって、
    　前記切欠部は、複数箇所に設けられることを特徴とする圧着端子。
     
PCT/JP2014/076661 2013-10-08 2014-10-06 圧着端子 WO2015053208A1 (ja)

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JP2017059389A (ja) 2015-09-16 2017-03-23 株式会社オートネットワーク技術研究所 圧着端子付電線、ワイヤハーネス及び圧着端子
CN107946782B (zh) 2016-10-13 2020-07-28 矢崎总业株式会社 带端子的电线、带端子的电线的制造方法和端子压接装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965985U (ja) * 1972-09-20 1974-06-10
JP2005050736A (ja) * 2003-07-30 2005-02-24 Furukawa Electric Co Ltd:The アルミ電線への端子圧着構造及び端子付アルミ電線の製造方法
JP2007180009A (ja) * 2005-12-02 2007-07-12 Ngk Spark Plug Co Ltd 圧着端子及び当該圧着端子を備えたガスセンサ及び前記圧着端子の製造方法
JP2013196832A (ja) * 2012-03-16 2013-09-30 Yazaki Corp 圧着端子付き電線

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965985U (ja) * 1972-09-20 1974-06-10
JP2005050736A (ja) * 2003-07-30 2005-02-24 Furukawa Electric Co Ltd:The アルミ電線への端子圧着構造及び端子付アルミ電線の製造方法
JP2007180009A (ja) * 2005-12-02 2007-07-12 Ngk Spark Plug Co Ltd 圧着端子及び当該圧着端子を備えたガスセンサ及び前記圧着端子の製造方法
JP2013196832A (ja) * 2012-03-16 2013-09-30 Yazaki Corp 圧着端子付き電線

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