JP2014164869A - Wiring harness - Google Patents

Wiring harness Download PDF

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JP2014164869A
JP2014164869A JP2013033293A JP2013033293A JP2014164869A JP 2014164869 A JP2014164869 A JP 2014164869A JP 2013033293 A JP2013033293 A JP 2013033293A JP 2013033293 A JP2013033293 A JP 2013033293A JP 2014164869 A JP2014164869 A JP 2014164869A
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core wire
crimping
wire
crimped
exposed
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Yasushi Kihara
泰 木原
Hiroshi Orito
博 折戸
Yukihiro Kawamura
幸大 川村
Sho Sotoike
翔 外池
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Furukawa Electric Co Ltd
Furukawa Automotive Systems Inc
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Furukawa Electric Co Ltd
Furukawa Automotive Systems Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a wiring harness that enables stable contact conduction even in a case where an electric wire is formed by being twisted.SOLUTION: A wiring harness 1 comprises an electric wire 10 and a crimped terminal 20. The electric wire 10 has: a covered part 12 in which a twisted element wire is covered with an insulator; and an exposed part 11 in which part of the element wire is exposed from the leading end of the insulation part 12. The crimped terminal 20 has: a box part 21, which is located at a leading end part 20A thereof; and a crimped part 22, which is located at a trailing end part 20B and into which the electric wire 10 can be inserted. The crimped part 22 includes: a covered crimped part 24 which is open in the trailing end part 20B and is crimped to the covered part 12; and a core wire crimped part 23 which is crimped to the exposed part 11. The internal surface of the core wire crimped part 23 has a groove 30. The groove part 30 has an angle β substantially orthogonal to the twisted element wire.

Description

本発明は自動車等に用いられるワイヤハーネスに関するものである。   The present invention relates to a wire harness used in an automobile or the like.

従来、被覆導線に接続される端子として、圧着部と端子本体とからなる端子が用いられている。圧着部の圧着面には、導線の一部を係止するものとして、セレーションとよばれる係止部が長手方向に所定間隔を隔てて形成され、被覆導線は、圧着部によって端子に圧着される(例えば、特許文献1参照)。セレーションは、被覆導線の被覆から露出した導線に圧着時に食い込むことにより、圧着部からの導線の抜けを防ぐ。   Conventionally, a terminal composed of a crimping portion and a terminal main body is used as a terminal connected to the coated conductor. On the crimping surface of the crimping part, a latching part called serration is formed at a predetermined interval in the longitudinal direction so as to latch a part of the conducting wire, and the coated conducting wire is crimped to the terminal by the crimping part. (For example, refer to Patent Document 1). Serration prevents the lead wire from coming out of the crimping part by biting into the lead wire exposed from the coating of the coated lead wire at the time of crimping.

しかし、被覆導線と端子とを接続する場合、導線と圧着部との間に隙間が生じやすく、導線が外気や水に曝されて腐食が発生することがある。また、近年、ワイヤハーネスを軽量化するためにアルミ製の導線が用いられているが、アルミ製の導線と銅製の端子とを接続する場合、異種金属である導線と端子との接触部に水が侵入し、電食が発生することがある(例えば、特許文献2参照)。   However, when connecting the coated conductor and the terminal, a gap is likely to be formed between the conductor and the crimping part, and the conductor may be exposed to the outside air or water to cause corrosion. In recent years, aluminum conductors have been used to reduce the weight of wire harnesses. However, when connecting aluminum conductors and copper terminals, the contact portion between the conductors of different metals and the terminals is water. May intrude and cause electrolytic corrosion (see, for example, Patent Document 2).

特開2012−009178号公報JP 2012-009178 A 特開2012−190635号公報JP 2012-190635 A

このような水分等の侵入を防ぐ目的で、断面中空形状で一端側が封止された圧着部を有する端子が検討されている。断面中空形状の圧着部を有する端子では、被覆導線を配置した圧着部をU字型形状等に変形させて、圧着部の断面の中心から外側に向かって導線を圧縮流動させることにより、端子と被覆導線とを圧着させる。また、被覆部が圧着部で圧着されることで、中空部に水が浸入することが防止される。ここで、導線がアルミ製である場合、圧着部にセレーションを設けることで、導線の抜けが防止されるだけでなく、アルミの酸化被膜を破壊する効果も得ることができる。   For the purpose of preventing such intrusion of moisture and the like, a terminal having a crimped portion having a hollow cross section and sealed at one end side has been studied. In a terminal having a crimp section with a hollow cross-section, the crimp section where the coated conductor is disposed is deformed into a U-shape or the like, and the conductor is compressed and flowed outward from the center of the cross section of the crimp section. Crimp the coated conductor. Moreover, it is prevented that water penetrate | invades into a hollow part because a coating | coated part is crimped | bonded by a crimping | compression-bonding part. Here, when the conducting wire is made of aluminum, by providing serrations in the crimping part, not only the conducting wire is prevented from coming off but also an effect of destroying the aluminum oxide film can be obtained.

一般に、セレーションは電線の長手方向に交差する方向へ延びる。しかし、電線がらせん状に撚って形成された場合には、セレーションによって電線の撚りがほどけ、接触通電が不安定になるという問題があった。   Generally, the serration extends in a direction intersecting the longitudinal direction of the electric wire. However, when the electric wire is formed by twisting in a spiral shape, there is a problem that the electric wire is untwisted by serration and the contact energization becomes unstable.

本発明は、このような問題に鑑みてなされたもので、電線が撚って形成された場合であっても安定した接触通電が可能となるワイヤハーネスを提供することを目的とする。   The present invention has been made in view of such problems, and an object of the present invention is to provide a wire harness that enables stable contact energization even when an electric wire is twisted.

前述した目的を達するために第1の発明は、芯線が絶縁体で被覆された被覆部および前記被覆部の長手方向先端から前記芯線が露出した露出部を有する電線と、
前記被覆部に圧着される被覆圧着部および前記露出部に圧着される芯線圧着部を有する圧着端子とを含むワイヤハーネスであって、前記芯線は、複数の素線がらせん状に撚って形成されるとともに前記長手方向へ延びる仮想軸線に対する撚り角度を有し、前記芯線圧着部の内面には、複数の溝部が形成され、前記溝部は前記仮想軸線に対して交差する方向へ延びるとともに、その角度は前記素線の前記撚り角度よりも80〜100°大きいことを特徴とするワイヤハーネスである。
In order to achieve the above-described object, the first invention includes a covering portion in which a core wire is covered with an insulator, and an electric wire having an exposed portion in which the core wire is exposed from a longitudinal tip of the covering portion;
A wire harness including a cover crimping portion to be crimped to the covering portion and a crimp terminal having a core wire crimping portion to be crimped to the exposed portion, wherein the core wire is formed by twisting a plurality of strands in a spiral shape And having a twist angle with respect to the virtual axis extending in the longitudinal direction, and a plurality of grooves are formed on the inner surface of the core crimping portion, the grooves extending in a direction intersecting the virtual axis, and An angle is 80-100 degrees larger than the said twist angle of the said strand, It is a wire harness characterized by the above-mentioned.

前記芯線圧着部は、板状部材の前記長手方向に延びる側縁を互いに突き合せて接合部によって接合することによって形成され、前記接合部に対応する位置には、第1平坦部が形成されてもよい。   The core wire crimping part is formed by abutting side edges extending in the longitudinal direction of the plate-like member to each other and joining them by a joining part, and a first flat part is formed at a position corresponding to the joining part. Also good.

前記芯線圧着部は、前記長手方向へ延びる一対の縁部および底部によって形成される断面U字形を有し、前記縁部には、第2平坦部が形成されてもよい。   The core wire crimping portion may have a U-shaped cross section formed by a pair of edges and a bottom extending in the longitudinal direction, and a second flat portion may be formed on the edges.

前記芯線はアルミニウム系材料で構成され、前記芯線圧着部が銅系材料で構成されてもよい。   The core wire may be made of an aluminum material, and the core wire crimping portion may be made of a copper material.

前述した目的を達するために第2の発明は、芯線が絶縁体で被覆された被覆部および前記被覆部の前記長手方向先端から前記芯線が露出した露出部を有する電線と、前記被覆部に圧着される被覆圧着部および前記露出部に圧着される芯線圧着部を有する圧着端子とを含むワイヤハーネスの圧着方法であって、前記芯線は、複数の素線がらせん状に撚って形成され、前記芯線圧着部の内面には、前記長手方向へ延びる仮想軸線に対して傾斜する溝部が形成され、前記電線は、前記芯線圧着部に対して前記素線の撚り方向とは逆の方向に回転させながら圧着されることを特徴とする圧着方法である。   In order to achieve the above-described object, the second invention is characterized in that an electric wire having a covering portion in which a core wire is covered with an insulator, an exposed portion in which the core wire is exposed from the longitudinal end of the covering portion, and a pressure bonding to the covering portion. A crimping method of a wire harness including a coated crimping portion and a crimp terminal having a core crimping portion to be crimped to the exposed portion, wherein the core wire is formed by twisting a plurality of strands in a spiral shape, A groove portion that is inclined with respect to the virtual axis extending in the longitudinal direction is formed on the inner surface of the core wire crimping portion, and the electric wire rotates in a direction opposite to the stranding direction of the strand with respect to the core wire crimping portion. The pressure bonding method is characterized in that the pressure bonding is performed while the pressure is applied.

第1の発明によれば、電線の芯線は、複数の素線がらせん状に撚って形成され、圧着端子の芯線圧着部の内面に形成された溝部は、仮想軸線に対して傾斜するとともにその傾斜角は、素線の撚り角度よりも80〜100°大きいので、溝部は素線に対してほぼ直角に交差し、素線の撚りをほどけにくくして安定した接触通電を可能とする。   According to the first invention, the core wire of the electric wire is formed by twisting a plurality of strands in a spiral shape, and the groove portion formed on the inner surface of the core wire crimp portion of the crimp terminal is inclined with respect to the virtual axis. Since the inclination angle is 80 to 100 ° larger than the twisting angle of the strands, the groove portion intersects with the strands almost at right angles, making it difficult to untwist the strands and enabling stable contact energization.

芯線圧着部の接合部に対応する位置には、溝部が形成されない第1平坦部を設けることとしたので、接合部における接合強度の低下を防止することができる。   Since the 1st flat part in which a groove part is not formed is provided in the position corresponding to the junction part of a core wire crimping part, the fall of the joint strength in a junction part can be prevented.

前記芯線圧着部は、前記長手方向へ延びる一対の縁部および底部によって形成される断面U字形を有し、前記縁部には、第2平坦部が形成されることとしたので、肉薄になりやすい縁部における亀裂の発生を抑制することができる。   The core wire crimping portion has a U-shaped cross section formed by a pair of edge portions and a bottom portion extending in the longitudinal direction, and since the second flat portion is formed on the edge portion, the core wire is thinned. It is possible to suppress the occurrence of cracks at the easy edges.

第2の発明によれば、電線と圧着端子の圧着時において、電線を素線の撚り方向とは反対に回転させることとしたので、素線の撚りをより一層ほどけにくくすることができる。   According to the second aspect of the invention, when the electric wire and the crimp terminal are crimped, the electric wire is rotated in the direction opposite to the stranding direction of the strand, so that the stranding of the strand can be further reduced.

本発明によれば、電線の撚りがほどけるのを防ぎ、安定した接触通電を図ることができるワイヤハーネスを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the wire harness which can prevent untwisting of an electric wire and can aim at the stable contact electricity supply can be provided.

第1の実施形態にかかるワイヤハーネスの斜視図。The perspective view of the wire harness concerning a 1st embodiment. (a)圧着端子および電線の斜視図、(b)圧着端子に電線を挿入した状態の斜視図。(a) The perspective view of a crimp terminal and an electric wire, (b) The perspective view of the state which inserted the electric wire in the crimp terminal. 圧着端子の部分展開図。The partial expanded view of a crimp terminal. ワイヤハーネスの圧着加工の説明図。Explanatory drawing of the crimping process of a wire harness. 第2の実施形態にかかるワイヤハーネスの圧着端子の部分展開図。The partial expanded view of the crimp terminal of the wire harness concerning 2nd Embodiment.

<第1の実施形態>
図1はワイヤハーネス1の斜視図である。ワイヤハーネス1は、長手方向Xおよびこれに直交する幅方向Yを有し、電線10と圧着端子20とを含む。圧着端子20は、長手方向Xに延びるとともに、長手方向Xの前端部20Aに位置する図示しない雄型コネクタを挿入可能なボックス部21と、後端部20Bに位置する電線10を挿入可能な圧着部22とを有する。ボックス部21には、雄型コネクタの挿入タブに接触する弾性接触片21Aを備える。
<First Embodiment>
FIG. 1 is a perspective view of the wire harness 1. The wire harness 1 has a longitudinal direction X and a width direction Y orthogonal to the longitudinal direction X, and includes an electric wire 10 and a crimp terminal 20. The crimp terminal 20 extends in the longitudinal direction X, and is a crimp that allows insertion of a male connector (not shown) located at the front end 20A in the longitudinal direction X and a wire 10 located at the rear end 20B. Part 22. The box portion 21 includes an elastic contact piece 21A that comes into contact with the insertion tab of the male connector.

圧着部22は、長手方向Xへ延びる接合部25によって水密に接合される。詳細には、端子形状に打ち抜いた銅合金条の端部を中空形状になるように互いに突合せ、突合せた部分をレーザ溶接等の溶接によって接合部25を形成することができる。圧着部22は、芯線圧着部23と、被覆圧着部24とを含む。芯線圧着部23は、被覆圧着部24とボックス部21との間に位置する。被覆圧着部24は、後端部20Bに開口する。   The crimping part 22 is joined in a watertight manner by a joining part 25 extending in the longitudinal direction X. Specifically, the end portions of the copper alloy strips punched into the terminal shape can be butted together so as to have a hollow shape, and the joined portion 25 can be formed by welding such as laser welding. The crimping part 22 includes a core crimping part 23 and a covering crimping part 24. The core wire crimping part 23 is located between the covering crimping part 24 and the box part 21. The covering crimping part 24 opens to the rear end part 20B.

図2は、ワイヤハーネス1の製造工程の一部を示したものであって、図2(a)は、電線10および圧着端子20のそれぞれの斜視図であって、圧着端子20に電線10を挿入する前の図ある。電線10は、導電性を有する芯線が絶縁体15で被覆された被覆部12と、被覆部12の長手方向X先端から芯線の一部が露出した露出部11とを有する。   FIG. 2 shows a part of the manufacturing process of the wire harness 1, and FIG. 2A is a perspective view of the electric wire 10 and the crimp terminal 20, and the electric wire 10 is connected to the crimp terminal 20. It is a figure before inserting. The electric wire 10 includes a covering portion 12 in which a conductive core wire is covered with an insulator 15 and an exposed portion 11 in which a part of the core wire is exposed from the distal end in the longitudinal direction X of the covering portion 12.

芯線は、アルミニウムやアルミニウム合金等のアルミニウム系材料で構成され、より詳細には、複数のアルミニウム合金線等の素線16を撚って形成する。素線16は、時計回りにらせん状に撚られる。長手方向Xへ延びる仮想軸線2に対する素線16の角度を撚り角度αとする。   The core wire is made of an aluminum-based material such as aluminum or an aluminum alloy. More specifically, the core wire is formed by twisting strands 16 such as a plurality of aluminum alloy wires. The strand 16 is twisted spirally in a clockwise direction. An angle of the strand 16 with respect to the virtual axis 2 extending in the longitudinal direction X is defined as a twist angle α.

圧着端子20は、表面が錫メッキされた黄銅等の銅合金条を平面展開した端子形状に打ち抜いた後(図示せず)、中空四角柱体のボックス部21と中空円柱体の圧着部22とから構成される立体的な端子形状に曲げ加工されて形成される。図2(b)に示したように、曲げ加工された圧着部22の後端部20Bから、電線10が挿入される。   The crimping terminal 20 is formed by punching a copper alloy strip such as brass whose surface is tin-plated into a flattened terminal shape (not shown), and then forming a box portion 21 of a hollow quadrangular prism body and a crimping portion 22 of a hollow cylindrical body. It is formed by bending into a three-dimensional terminal shape composed of As shown in FIG. 2B, the electric wire 10 is inserted from the rear end portion 20B of the crimped portion 22 that has been bent.

再び図1を参照すれば、電線10が挿入された圧着部22は、圧着工具によって加締められ、露出部11に対向する芯線圧着部23と被覆部12に対向する被覆圧着部24とが形成される。被覆圧着部24は、被覆部12の形状に沿ってほぼ円柱になるように加締められ、芯線圧着部23は、素線16を押しつぶすようにその内面を互いに接触させるように加締められる。このように加締めた芯線圧着部23は、幅方向Yに沿って切断したときの断面形状がほぼU字形となる。詳細には、一対の縁部26を開口端とし、縁部26の間を底部27とする断面U字形が形成される。   Referring again to FIG. 1, the crimping part 22 into which the electric wire 10 is inserted is crimped by a crimping tool to form a core crimping part 23 facing the exposed part 11 and a covering crimping part 24 facing the covering part 12. Is done. The cover crimping portion 24 is crimped so as to be substantially cylindrical along the shape of the cover portion 12, and the core wire crimping portion 23 is crimped so that the inner surfaces thereof are brought into contact with each other so as to crush the strands 16. The core wire crimping portion 23 thus crimped has a substantially U-shaped cross section when cut along the width direction Y. Specifically, a U-shaped cross section is formed with the pair of edge portions 26 as open ends and the bottom portion 27 between the edge portions 26.

図3は、圧着端子20の圧着部22を展開した図である。圧着部22の内面には、仮想軸線2に対して角度βで交差する方向へ延びる複数条の溝部30が設けられる。溝部30は、幅方向Yに互いに離間するとともに、圧着部22の長手方向Xの前端部20A側にのみ設けられ、後端部20B側には設けられない。また、溝部30の幅方向Y外側であって、圧着部22の両側縁22A近傍には、溝が形成されない第1平坦部31が設けられる。   FIG. 3 is a developed view of the crimp portion 22 of the crimp terminal 20. A plurality of groove portions 30 extending in a direction intersecting with the virtual axis 2 at an angle β are provided on the inner surface of the crimping portion 22. The groove portions 30 are separated from each other in the width direction Y, and are provided only on the front end portion 20A side in the longitudinal direction X of the crimping portion 22 and are not provided on the rear end portion 20B side. Further, a first flat portion 31 in which no groove is formed is provided on the outer side in the width direction Y of the groove portion 30 and in the vicinity of both side edges 22A of the crimping portion 22.

上記のような平面に展開された圧着部22は、その長手方向Xに延びる両側縁22Aが互いに突き合わされて接合部25が形成される。両側縁22Aを溝部が形成されない第1平坦部31とすることによって、溝部によって接合部25の接合強度が低下するのを予防することができる。また、中空形状の圧着部22に電線10を挿入したとき、溝部30が形成された領域に露出部11が位置し、この領域で芯線圧着部23が形成される。溝部30よりも後端部20B側の溝部が設けられない領域に被覆部12が位置し、被覆圧着部24が形成される。なお、図面中の仮想線32は、仮想軸線2と側縁22Aとの幅方向Yの二等分線であって、仮想線32近傍にU字形の縁部26が形成される。   As for the crimping | compression-bonding part 22 expand | deployed in the above planes, the both-sides edge 22A extended in the longitudinal direction X is mutually faced | matched, and the junction part 25 is formed. By making the both side edges 22A the first flat portions 31 where no groove portions are formed, it is possible to prevent the bonding strength of the bonding portions 25 from being lowered by the groove portions. Further, when the electric wire 10 is inserted into the hollow crimping part 22, the exposed part 11 is located in the area where the groove part 30 is formed, and the core crimping part 23 is formed in this area. The covering portion 12 is located in a region where the groove portion on the rear end portion 20B side than the groove portion 30 is not provided, and the covering crimping portion 24 is formed. The imaginary line 32 in the drawing is a bisector in the width direction Y between the imaginary axis 2 and the side edge 22A, and a U-shaped edge 26 is formed in the vicinity of the imaginary line 32.

溝部30の角度βは、素線16に対してほぼ直角に交差する角度とする。すなわち、撚り角度αを有する素線16の場合、角度βは、撚り角度αよりも80〜100°大きくする。換言すれば、角度βの大きさは、撚り角度α+80°<角度β<撚り角度α+100°によってあらわすことができる。より好ましくは、角度βは、撚り角度α+90°である。溝部30の角度βをこのような角度にすることによって、溝部30は素線16にほぼ直角に交差することができる。   The angle β of the groove portion 30 is an angle that intersects the strand 16 substantially at a right angle. That is, in the case of the strand 16 having the twist angle α, the angle β is made 80 to 100 ° larger than the twist angle α. In other words, the magnitude of the angle β can be expressed by a twist angle α + 80 ° <angle β <twist angle α + 100 °. More preferably, the angle β is a twist angle α + 90 °. By setting the angle β of the groove part 30 to such an angle, the groove part 30 can intersect the strand 16 at a substantially right angle.

図4は、圧着刃型40で芯線圧着部23を圧着加工するときの説明図である。図4(a)は圧着前、図4(b)は圧着後の状態を示す。圧着刃型40は、第1刃型41と第2刃型42とを有する。第1刃型41は、図面下方に突出する凸部43と凸部43の幅方向Y両側に位置する肩部44とを有する。第2刃型42は、第1刃型41が噛み合う凹部45を有する。第2刃型42の凹部45に第1刃型41の凸部43および肩部44を対向させるとともに、これらの間に露出部11の素線16が挿入された芯線圧着部23を介在させる。   FIG. 4 is an explanatory view when the core wire crimping portion 23 is crimped by the crimping blade mold 40. 4A shows a state before pressure bonding, and FIG. 4B shows a state after pressure bonding. The crimping blade mold 40 has a first blade mold 41 and a second blade mold 42. The first blade mold 41 has a convex portion 43 projecting downward in the drawing and shoulder portions 44 located on both sides in the width direction Y of the convex portion 43. The second blade mold 42 has a recess 45 with which the first blade mold 41 is engaged. The convex portion 43 and the shoulder portion 44 of the first blade die 41 are opposed to the concave portion 45 of the second blade die 42, and the core wire crimping portion 23 in which the strand 16 of the exposed portion 11 is inserted is interposed therebetween.

第1刃型41と第2刃型42とを図4(b)に示すように噛み合わせ、芯線圧着部23を素線16に圧着させると同時に、電線10を矢印3で示す反時計回りへ回転させる。矢印3方向とは、素線16の撚り方向とは反対の方向である(図2(b)参照)。したがって、撚った素線16をほどけにくくすることができる。   The first blade mold 41 and the second blade mold 42 are engaged with each other as shown in FIG. 4B, and the core wire crimping portion 23 is crimped to the strand 16, and at the same time, the electric wire 10 is turned counterclockwise as indicated by the arrow 3. Rotate. The direction of the arrow 3 is the direction opposite to the twisting direction of the strand 16 (see FIG. 2B). Therefore, the twisted strand 16 can be made difficult to unwind.

図4(b)に示したように、第1刃型41に凸部43を設けることによって、芯線圧着部23には縁部26および底部27が形成され、全体としてU字形になる。このような圧着時において、第1刃型41と第2刃型42との間には、隙間46が形成される。第1刃型41に第2刃型42を押圧すると、肩部44で芯線圧着部23の縁部26が幅方向Y外側に押し付けられ、その押し付けによって縁部26が隙間46を伝って図面上方へと移動する。縁部26が肩部44で幅方向Y外側に押し付けられるのと同時に、素線16も図面上下に対向する芯線圧着部23の内面間を幅方向Y外側に摺動する。仮に、溝部30を幅方向Yに平行に形成した場合には、素線16全体が摺動しやすくなり、素線16の撚りがほどけてしまう可能性がある。しかし、この実施形態では、溝部30を素線16に対してほぼ直角に交差するようにしているので、撚りをほどけにくくすることができる。さらに、溝部30を形成することによって、素線16の表面の酸化被膜が剥離され、素線16と圧着端子20との電気的な接続を良好にすることができる。   As shown in FIG. 4 (b), by providing the first blade mold 41 with the convex portion 43, the core wire crimping portion 23 is formed with an edge portion 26 and a bottom portion 27, and becomes U-shaped as a whole. During such crimping, a gap 46 is formed between the first blade mold 41 and the second blade mold 42. When the second blade die 42 is pressed against the first blade die 41, the edge portion 26 of the core wire crimping portion 23 is pressed to the outside in the width direction Y by the shoulder portion 44, and the edge portion 26 is transmitted through the gap 46 by the pressing, and the upper part of the drawing. Move to. At the same time that the edge portion 26 is pressed to the outside in the width direction Y by the shoulder portion 44, the element wire 16 also slides between the inner surfaces of the core wire crimping portions 23 facing the top and bottom of the drawing outward in the width direction Y. If the groove portion 30 is formed in parallel to the width direction Y, the entire strand 16 is likely to slide, and the strand 16 may be untwisted. However, in this embodiment, since the groove part 30 intersects the strand 16 at a substantially right angle, it is possible to make it difficult to untwist. Furthermore, by forming the groove portion 30, the oxide film on the surface of the strand 16 is peeled off, and the electrical connection between the strand 16 and the crimp terminal 20 can be improved.

被覆部12において、素線16を覆う絶縁体15として、弾性を有するポリ塩化ビニル(PVC)、ポリエチレン等、この技術の分野において通常用いられるものを選択することができる。   In the covering portion 12, as the insulator 15 that covers the element wire 16, an elastic material such as polyvinyl chloride (PVC), polyethylene, or the like that is usually used in this technical field can be selected.

圧着部22の溝部30以外における厚さ寸法は、銅合金条を所望の形状に打ち抜いた後であって、立体的な形状に形成する前の状態で、約0.4mm以下、好ましくは0.25〜0.04mmであることが望ましい。なお、圧着端子20はボックス部21および圧着部22は1枚の銅合金条を打ち抜いて形成することができるから、このような場合にはボックス部21も圧着部22と同じ厚さ寸法である。このような厚さ寸法にすることによって、曲げ加工が容易であるとともに、圧着加工した際にも亀裂の発生を予防することができる。また、溝部30の寸法は約0.07mmとすることが望ましい。このような厚さ寸法にすることによって、素線16の酸化被膜を剥離することができ、かつ、亀裂の発生を予防することができる。   The thickness dimension of the crimping portion 22 other than the groove portion 30 is about 0.4 mm or less, preferably 0. 0, after the copper alloy strip is punched into a desired shape and before the three-dimensional shape is formed. It is desirable that it is 25-0.04 mm. Since the crimp terminal 20 can be formed by punching a single copper alloy strip in the box portion 21 and the crimp portion 22, the box portion 21 has the same thickness as the crimp portion 22 in such a case. . By making such a thickness dimension, it is easy to bend, and the occurrence of cracks can be prevented even when crimping. The dimension of the groove 30 is preferably about 0.07 mm. By setting it as such a thickness dimension, the oxide film of the strand 16 can be peeled and generation | occurrence | production of a crack can be prevented.

この実施形態において、芯線圧着部23はU字形であるが、これに限られるものではない。例えば、円形、楕円形等であってもよいし、芯線圧着部23が平坦に加締められているようなものであってもよい。すなわち、この技術分野における通常の方法によって得られる形状を制限なく用いることができる。また、溝部30は、直線上に連続して延びる線条であるが、複数のドット状の溝が間隔を置いて並び、全体として線条に見えるようにしてもよい。   In this embodiment, the core wire crimping portion 23 is U-shaped, but is not limited thereto. For example, a circular shape, an elliptical shape, or the like may be used, or the core wire crimping portion 23 may be crimped flat. That is, the shape obtained by a normal method in this technical field can be used without limitation. Moreover, although the groove part 30 is a linear line continuously extended on a straight line, a some dot-shaped groove | channel may be located in a line at intervals and you may make it look like a linear line as a whole.

<第2の実施形態>
図5は第2の実施形態のワイヤハーネスの圧着端子20を示すものであり、圧着部22を展開した斜視図である。第1の実施形態と同様の構成要素については、第1の実施形態と同じ符号を用い、その詳細な説明を省略する。
この第2の実施形態において、長手方向Xへ延びる仮想線32近傍には溝部が形成されない第2平坦部33を設けることを特徴とする。
<Second Embodiment>
FIG. 5 shows the crimp terminal 20 of the wire harness of the second embodiment, and is a perspective view in which the crimp part 22 is developed. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.
The second embodiment is characterized in that a second flat portion 33 in which no groove portion is formed is provided in the vicinity of the virtual line 32 extending in the longitudinal direction X.

仮想線32は、仮想軸線2と圧着部22の側縁22Aとの幅方向Yにおける二等分線であり、仮想線32近傍には圧着時においてU字形の開口端である縁部26が形成される。このような圧着端子20は、第1の実施形態で用いた圧着刃型40を用いて圧着することができるが、圧着時において、縁部26が第1刃型41と第2刃型42との隙間46に入り込んで肉薄になりやすい(図4参照)。この実施形態において、縁部26が形成される仮想線32近傍に第2平坦部33を設けることとしたので、縁部26を溝部の形成によってさらに肉薄にするのを予防することができる。縁部26に溝部を形成することによって圧着端子20の亀裂発生が懸念されるが、この実施形態ではこれを回避することができる。なお、この実施形態は、アルミニウム系材料の芯線を用いた際に、更に効果を有する。すなわち、アルミニウムは、例えば銅などに比べて強度が低いところ、この実施形態は、芯線圧着部を従来に比べて高圧着とする必要がなく、アルミニウム系材料の芯線に対して有用である。   The imaginary line 32 is a bisector in the width direction Y between the imaginary axis 2 and the side edge 22A of the crimping part 22, and an edge part 26 that is a U-shaped open end is formed in the vicinity of the imaginary line 32 during crimping. Is done. Such a crimping terminal 20 can be crimped by using the crimping blade mold 40 used in the first embodiment. At the time of crimping, the edge portion 26 has a first blade mold 41, a second blade mold 42, and the like. Easily enters the gap 46 and becomes thin (see FIG. 4). In this embodiment, since the 2nd flat part 33 was provided in the virtual line 32 vicinity in which the edge part 26 is formed, it can prevent making the edge part 26 still thinner by formation of a groove part. By forming a groove in the edge portion 26, there is a concern that the crimp terminal 20 will crack, but this embodiment can avoid this. In addition, this embodiment has a further effect when the core wire of an aluminum-type material is used. That is, aluminum has a lower strength than, for example, copper and the like, and this embodiment is useful for a core wire made of an aluminum-based material because the core wire crimping portion does not need to be highly crimped compared to conventional ones.

以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

1…ワイヤハーネス
10…電線
11…露出部
12…被覆部
15…絶縁体
16…素線
20…圧着端子
23…芯線圧着部
24…被覆圧着部
25…接合部
26…縁部
27…底部
30…溝部
31…第1平坦部
33…第2平坦部
X…長手方向
DESCRIPTION OF SYMBOLS 1 ... Wire harness 10 ... Electric wire 11 ... Exposed part 12 ... Covering part 15 ... Insulator 16 ... Elementary wire 20 ... Crimp terminal 23 ... Core wire crimping part 24 ... Cover crimping part 25 ... Joining part 26 ... Edge 27 ... Bottom part 30 ... Groove 31 ... first flat portion 33 ... second flat portion X ... longitudinal direction

Claims (5)

芯線が絶縁体で被覆された被覆部および前記被覆部の長手方向先端から前記芯線が露出した露出部を有する電線と、
前記被覆部に圧着される被覆圧着部および前記露出部に圧着される芯線圧着部を有する圧着端子と
を含むワイヤハーネスであって、
前記芯線は、複数の素線がらせん状に撚って形成されるとともに前記長手方向へ延びる仮想軸線に対する撚り角度を有し、
前記芯線圧着部の内面には、複数の溝部が形成され、
前記溝部は前記仮想軸線に対して交差する方向へ延びるとともに、その角度は前記素線の撚り角度よりも80〜100°大きいことを特徴とするワイヤハーネス。
An electric wire having a covering portion in which a core wire is covered with an insulator and an exposed portion in which the core wire is exposed from a longitudinal tip of the covering portion;
A wire harness including a cover crimping portion to be crimped to the covering portion and a crimp terminal having a core wire crimping portion to be crimped to the exposed portion;
The core wire is formed by twisting a plurality of strands in a spiral shape and has a twist angle with respect to a virtual axis extending in the longitudinal direction,
A plurality of groove portions are formed on the inner surface of the core wire crimping portion,
The said groove part is extended in the direction which cross | intersects with respect to the said virtual axis, The angle is 80-100 degrees larger than the twist angle of the said strand, The wire harness characterized by the above-mentioned.
前記芯線圧着部は、板状部材の前記長手方向に延びる側縁を互いに突き合せて接合部によって接合することによって形成され、前記接合部に対応する位置には、第1平坦部が形成されることを特徴とする請求項1記載のワイヤハーネス。   The core wire crimping portion is formed by abutting side edges extending in the longitudinal direction of the plate-like members to each other and joining them with a joining portion, and a first flat portion is formed at a position corresponding to the joining portion. The wire harness according to claim 1. 前記芯線圧着部は、前記長手方向へ延びる一対の縁部および底部によって形成される断面U字形を有し、
前記縁部には、第2平坦部が形成されることを特徴とする請求項1または2記載のワイヤハーネス。
The core wire crimping portion has a U-shaped cross section formed by a pair of edges and a bottom extending in the longitudinal direction,
The wire harness according to claim 1, wherein a second flat portion is formed on the edge portion.
前記芯線はアルミニウム系材料で構成され、前記芯線圧着部が銅系材料で構成されることを特徴とする請求項1〜3のいずれかに記載のワイヤハーネス。   The wire harness according to any one of claims 1 to 3, wherein the core wire is made of an aluminum-based material, and the core wire crimping portion is made of a copper-based material. 芯線が絶縁体で被覆された被覆部および前記被覆部の長手方向先端から前記芯線が露出した露出部を有する電線と、前記被覆部に圧着される被覆圧着部および前記露出部に圧着される芯線圧着部を有する圧着端子とを含むワイヤハーネスの圧着方法であって、
前記芯線は、複数の素線がらせん状に撚って形成され、
前記芯線圧着部の内面には、前記長手方向へ延びる仮想軸線に対して交差する方向へ延びる溝部が形成され、
前記電線は、前記芯線圧着部に対して前記素線の撚り方向とは逆の方向に回転させながら圧着されることを特徴とする圧着方法。
An electric wire having a covering portion in which a core wire is covered with an insulator, an exposed portion in which the core wire is exposed from a longitudinal end of the covering portion, a covering pressure-bonding portion that is pressure-bonded to the covering portion, and a core wire that is pressure-bonded to the exposed portion A crimping method of a wire harness including a crimping terminal having a crimping portion,
The core wire is formed by twisting a plurality of strands in a spiral shape,
A groove portion extending in a direction intersecting the virtual axis extending in the longitudinal direction is formed on the inner surface of the core wire crimping portion,
The crimping method, wherein the electric wire is crimped to the core crimping portion while being rotated in a direction opposite to a twisting direction of the strand.
JP2013033293A 2013-02-22 2013-02-22 Wiring harness Pending JP2014164869A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018147828A (en) * 2017-03-08 2018-09-20 株式会社デルタプラス Crimp connection terminal and method of connecting the crimp connection terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018147828A (en) * 2017-03-08 2018-09-20 株式会社デルタプラス Crimp connection terminal and method of connecting the crimp connection terminal

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