JP5764591B2 - Wire harness - Google Patents

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JP5764591B2
JP5764591B2 JP2013033256A JP2013033256A JP5764591B2 JP 5764591 B2 JP5764591 B2 JP 5764591B2 JP 2013033256 A JP2013033256 A JP 2013033256A JP 2013033256 A JP2013033256 A JP 2013033256A JP 5764591 B2 JP5764591 B2 JP 5764591B2
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crimping
core wire
continuous
wire
groove
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JP2014164865A (en
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泰 木原
泰 木原
博 折戸
博 折戸
幸大 川村
幸大 川村
翔 外池
翔 外池
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THE FURUKAW ELECTRIC CO., LTD.
Furukawa Automotive Systems Inc
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THE FURUKAW ELECTRIC CO., LTD.
Furukawa Automotive Systems Inc
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本発明は自動車等に用いられるワイヤハーネスおよびワイヤハーネスに用いる圧着端子に関するものである。   The present invention relates to a wire harness used for an automobile or the like and a crimp terminal used for the wire harness.

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.

しかしながら、セレーションが設けられた部分では、圧着端子の厚さ寸法が小さくなり、特に曲げ加工等によって肉薄になった場合には、セレーションの形成部分に亀裂が生じやすいという問題があった。   However, in the portion provided with serration, the thickness dimension of the crimp terminal is reduced, and particularly when the thickness is thinned by bending or the like, there is a problem that the portion where the serration is formed is likely to be cracked.

本発明は、このような問題に鑑みてなされたもので、部分的に肉薄の溝部を設けても、そこから亀裂が生じることがない圧着端子およびその圧着端子を用いた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 a problem, and provides a crimp terminal and a wire harness using the crimp terminal in which a crack is not generated even if a partially thin groove portion is provided. With the goal.

前述した目的を達成するために第1の発明は、導電性の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露出する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と、前記露出部に圧着される芯線圧着部とを有する圧着端子とを含むワイヤハーネスであって、前記芯線圧着部は、前記芯線を介して対向する上部および下部と、前記上部および前記下部を連続する一対の連続部と、前記上部および前記下部のそれぞれの対向面に設けられた第1および第2溝部と、前記連続部に位置する第1平坦部とを含み、前記芯線圧着部は、板状部材の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、前記芯線圧着部はU字形状であり、U字形状開口端に前記第1の平坦部を設け、前記連続部の間をU字底部とする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 conductive core wire is covered with an insulator, and an electric wire having an exposed portion exposed from a longitudinal tip of the covering portion,
A wire harness including a crimping terminal having a coated crimping part to be crimped to the covering part and a core crimping part to be crimped to the exposed part, wherein the core wire crimping part is opposed to the upper part through the core wire. And a lower part, a pair of continuous parts continuing the upper part and the lower part, first and second groove parts provided on the opposing surfaces of the upper part and the lower part, and a first flat part located in the continuous part seen including, the core wire crimping portion bets, formed by joining the joint portion to butt the side edges extending in the longitudinal direction of the plate-like member to each other, the core wire crimping portion is U-shaped, U-shaped The wire harness is characterized in that the first flat portion is provided at an opening end, and a U-shaped bottom portion is formed between the continuous portions .

第2の発明は導電性の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露出する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と、前記露出部に圧着される芯線圧着部とを有する圧着端子とを含むワイヤハーネスであって、前記芯線圧着部は、前記芯線を介して対向する上部および下部と、前記上部および前記下部を連続する一対の連続部と、前記上部および前記下部のそれぞれの対向面に設けられた第1および第2溝部と、前記連続部に位置する第1平坦部とを含み、前記芯線圧着部は、板状部材の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、前記芯線圧着部は上方下方に2か所の角部を有する略矩形状であり、前記角部に前記第1平坦部が位置することを特徴とするワイヤハーネスである。According to a second aspect of the present invention, there is provided a covered portion in which a conductive core wire is covered with an insulator, an electric wire having an exposed portion exposed from a longitudinal tip of the covered portion, a covered crimp portion to be crimped to the covered portion, and the exposed portion A wire harness including a crimp terminal having a core wire crimping portion to be crimped to a portion, wherein the core wire crimping portion includes a pair of an upper portion and a lower portion opposed to each other via the core wire, and a pair of the upper portion and the lower portion. Including a continuous portion, first and second groove portions provided on the opposing surfaces of the upper portion and the lower portion, and a first flat portion located in the continuous portion, wherein the core wire crimping portion is a plate-like member. The core wire crimping portions are formed in a substantially rectangular shape having two corners in the upper and lower sides, and are formed by joining side edges extending in the longitudinal direction to each other and joining them by a joining portion. That the flat part is located. A wire harness to symptoms.

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.

本発明によれば、圧着端子の芯線圧着部が電線の芯線露出部に圧着され、被覆圧着部が被覆部に圧着され、芯線圧着部の上部および下部にはそれぞれの対向面に幅方向へ延びる第1および第2溝部を設け、長手方向へ延びる一対の連続部には第1平坦部を設けるので、肉薄になりやすい連続部において溝が形成されることがなく、亀裂を抑制することができる。   According to the present invention, the core wire crimping portion of the crimp terminal is crimped to the core wire exposed portion of the electric wire, the covering crimping portion is crimped to the covering portion, and the upper and lower portions of the core wire crimping portion extend in the width direction on the respective opposing surfaces. Since the first and second groove portions are provided and the first flat portion is provided in the pair of continuous portions extending in the longitudinal direction, the grooves are not formed in the continuous portion that tends to be thin, and cracks can be suppressed. .

また、芯線圧着部の接合部に対応する位置には、第2平坦部が形成されるので、接合部の接合を強固にすることができる。   Moreover, since the 2nd flat part is formed in the position corresponding to the junction part of a core wire crimping part, joining of a junction part can be strengthened.

芯線圧着部は、U字形状であり、連続部をU字開口端とし、連続部の間をU字底部とするので、連続部は肉薄になりやすいが、連続部における亀裂を抑制することができる。   The core wire crimping part is U-shaped, the continuous part is a U-shaped open end, and the space between the continuous parts is a U-shaped bottom, so the continuous part tends to be thin, but it can suppress cracks in the continuous part. it can.

本発明によれば、他の部分よりも肉薄になりやすい連続部において亀裂が発生しにくい圧着端子およびその圧着端子を用いた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 crimp terminal which a crack does not generate | occur | produce easily in the continuous part which tends to become thinner than another part, and the wire harness using the crimp terminal can be provided.

ワイヤハーネスの斜視図。The perspective view of a wire harness. (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. 溝部の他の態様を示した圧着端子の部分展開図。The partial expanded view of the crimp terminal which showed the other aspect of the groove part. 芯線圧着部の他の態様示した断面図。Sectional drawing which showed the other aspect of the core wire crimping part.

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。   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、圧着端子20に電線10を挿入する前のそれぞれの斜視図である。電線10は、導電性を有する芯線16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16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 each before the electric wire 10 is inserted into the crimp terminal 20. The electric wire 10 includes a covering portion 12 in which a conductive core wire 16 is covered with an insulator 15 and an exposed portion 11 in which a part of the core wire 16 is exposed from the distal end in the longitudinal direction X of the covering portion 12.

芯線16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を撚って形成する。芯線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。   The core wire 16 is made of an aluminum-based material such as aluminum or an aluminum alloy, and more specifically, is formed by twisting a plurality of aluminum alloy wires or the like. As the insulator 15 that covers the core wire 16, one that is usually used in the field of this technology, such as elastic polyvinyl chloride (PVC), polyethylene, or the like, can be selected.

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、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。このような圧着端子20において、図面上方における接合部25の近傍が上部23Aであり、これに対向する図面下方が下部23Bであり、これらの間に左右一対の連続部26が形成される。この実施形態において、加締め前の圧着部22は上部23A,下部23B,および連続部26によって円柱体が形成される。   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 processed crimp portion 22. In such a crimp terminal 20, the vicinity of the joint portion 25 in the upper part of the drawing is the upper part 23 </ b> A, and the lower part of the drawing opposite the lower part 23 </ b> B is formed, and a pair of left and right continuous parts 26 are formed therebetween. In this embodiment, the crimping part 22 before caulking is formed into a cylindrical body by the upper part 23A, the lower part 23B, and the continuous part 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、幅方向Y両側に離間して設けられる複数条の第1溝部31と、第1溝部31の幅方向Yの間に設けられる複数条の第2溝部32と、第1溝部31および第2溝部32の間に位置し、溝が形成されない第1平坦部33と、第1溝部31のさらに幅方向Y外側に位置する第2平坦部34とを含む。第1平坦部33は、長手方向Xへ延びる仮想線35近傍に設けられ、仮想線35によって、U字形の芯線圧着部23の開口端が形成される(図1参照)。   FIG. 3 is a developed view of the crimp portion 22 of the crimp terminal 20. On the inner surface of the pressure-bonding portion 22, a plurality of first groove portions 31 provided on both sides in the width direction Y, a plurality of second groove portions 32 provided between the width directions Y of the first groove portions 31, It includes a first flat portion 33 that is located between the first groove portion 31 and the second groove portion 32 and is not formed with a groove, and a second flat portion 34 that is located further outside the first groove portion 31 in the width direction Y. The 1st flat part 33 is provided in the virtual line 35 vicinity extended in the longitudinal direction X, and the opening end of the U-shaped core wire crimping part 23 is formed with the virtual line 35 (refer FIG. 1).

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され接合部25が形成される。両側縁22A近傍には、溝がない第2平坦部34が形成されるので、接合部25における接合が溝の形成によって低下するのを防止することができる。   The crimping portion 22 developed in the plane as described above is joined by joining both side edges 22 </ b> A extending in the longitudinal direction X to each other to form a joined portion 25. Since the second flat portion 34 having no groove is formed in the vicinity of the side edges 22A, it is possible to prevent the bonding at the bonding portion 25 from being lowered due to the formation of the groove.

第1溝部31および第2溝部32は、圧着部22の前端部20A側に設けられ、後端部20B側には設けられない。このような圧着端子20において、第1溝部31および第2溝部32が形成された領域で、芯線圧着部23が形成され、第1溝部31および第2溝部32よりも後端部20B側の溝部が設けられない領域で、被覆圧着部24が形成される。   The 1st groove part 31 and the 2nd groove part 32 are provided in the front-end part 20A side of the crimping | compression-bonding part 22, and are not provided in the rear-end part 20B side. In such a crimp terminal 20, the core wire crimp part 23 is formed in the region where the first groove part 31 and the second groove part 32 are formed, and the groove part on the rear end part 20B side from the first groove part 31 and the second groove part 32. The coating pressure-bonding portion 24 is formed in a region where no is provided.

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)は圧着後を示す。芯線圧着部23を圧着加工するための圧着刃型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の芯線16が挿入された芯線圧着部23を介在させ、第1刃型41と第2刃型42とを押圧することによって、芯線16と芯線圧着部23とを圧着することができる。   FIG. 4 is an explanatory view when the core wire crimping portion 23 is crimped by the crimping blade mold 40. FIG. 4A shows before crimping, and FIG. 4B shows after crimping. A crimping blade mold 40 for crimping the core wire crimping portion 23 includes 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 core wire 16 of the exposed portion 11 is inserted is interposed therebetween, so that the first The core wire 16 and the core wire crimping portion 23 can be crimped by pressing the one-blade die 41 and the second blade die 42.

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の幅方向Yに沿って切断したときの断面形状は、全体的にU字形になる。すなわち、一対の連続部26によって開口端部が形成され、上部23Aと下部23Bとによって底部27が形成される。なお、図示しないが被覆圧着部24は、被覆部12の形状に沿ってほぼ円柱になり、これら被覆圧着部24と被覆部12とが圧着される。   By providing the convex part 43 in the first blade mold 41, the cross-sectional shape when cut along the width direction Y of the core wire crimping part 23 is entirely U-shaped. That is, the opening end portion is formed by the pair of continuous portions 26, and the bottom portion 27 is formed by the upper portion 23A and the lower portion 23B. Although not shown, the coated crimping part 24 is substantially cylindrical along the shape of the coated part 12, and the coated crimping part 24 and the coated part 12 are crimped.

芯線圧着部23において、U字形状の開口端部を形成する連続部26は、仮想線35に沿って形成され、仮想線35近傍には第1平坦部33が形成される(図3参照)。したがって、連続部26には、溝が形成されない第1平坦部33が位置する。連続部26に第1平坦部33を設けることによって、圧着端子20の亀裂発生を抑制することができる。以下に、その理由について説明する。   In the core wire crimping portion 23, the continuous portion 26 forming the U-shaped opening end portion is formed along the virtual line 35, and the first flat portion 33 is formed in the vicinity of the virtual line 35 (see FIG. 3). . Therefore, the first flat portion 33 where no groove is formed is located in the continuous portion 26. By providing the first flat portion 33 in the continuous portion 26, the occurrence of cracks in the crimp terminal 20 can be suppressed. The reason will be described below.

すなわち、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の連続部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連続部26が隙間46を伝って図面上方へと移動する。したがって、連続部26は他の部分に比べて肉薄になりやすい。肉薄になったところにさらに溝部を形成すれば、亀裂の発生を誘発しかねない。しかし、連続部26には第1平坦部33が位置し、溝は形成されないので、たとえ連続部26が肉薄になったとしても亀裂が生じるのを抑制することができる。   That is, 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 continuous portion 26 of the core wire crimping portion 23 is pressed outward in the width direction Y by the shoulder portion 44. Move to. Therefore, the continuous part 26 tends to be thinner than other parts. If a groove is further formed in the thinned portion, cracks may be induced. However, since the first flat portion 33 is located in the continuous portion 26 and no groove is formed, the occurrence of cracks can be suppressed even if the continuous portion 26 becomes thin.

連続部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、芯線16も上部23Aおよび下部23Bの間を幅方向Y外側に摺動する。上部23Aおよび下部23Bには、第1溝部31と第2溝部32とが芯線16を介して対向するように設けられるので、芯線16は、第1溝部31および第2溝部32によって、芯線16の表面の酸化被膜が剥離され、芯線16と圧着端子20との良好な接触通電を図ることができる。   At the same time that the continuous portion 26 is pressed outward in the width direction Y by the shoulder portion 44, the core wire 16 also slides outward in the width direction Y between the upper portion 23A and the lower portion 23B. Since the first groove portion 31 and the second groove portion 32 are provided on the upper portion 23A and the lower portion 23B so as to face each other with the core wire 16 therebetween, the core wire 16 is connected to the core wire 16 by the first groove portion 31 and the second groove portion 32. The oxide film on the surface is peeled off, and good contact energization between the core wire 16 and the crimp terminal 20 can be achieved.

圧着部22の第1溝部31および第2溝部32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、第1溝部31および第2溝部32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、芯線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 first groove portion 31 and the second groove portion 32 is about 0. 0 after the copper alloy strip is punched into a desired shape and before the three-dimensional shape is formed. It is 4 mm or less, preferably 0.25 to 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. In addition, it is desirable that the dimensions of the first groove portion 31 and the second groove portion 32 be about 0.07 mm. By setting it as such a thickness dimension, the oxide film of the core wire 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、第1溝部31および第2溝部32は、直線的に延びる形状にしているが、曲線を有するものであってもよい。   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 1st groove part 31 and the 2nd groove part 32 are made into the shape extended linearly, you may have a curve.

図5は、この実施形態の第1溝部31および第2溝部32の他の態様を示したものである。図示したように、第1溝部31および第2溝部32は、多数のドット状の溝31Aおよび32Aが間隔を置いて幅方向Yへ並び、全体として線条の第1溝部31および第2溝部32に見えるようにしてもよい。また、溝31Aおよび溝32Aの平面形状をほぼ円形としているが、矩形や平行四辺形等の他の形状にすることもできる。   FIG. 5 shows another aspect of the first groove portion 31 and the second groove portion 32 of this embodiment. As shown in the drawing, the first groove portion 31 and the second groove portion 32 have a large number of dot-like grooves 31A and 32A arranged in the width direction Y at intervals, and the first groove portion 31 and the second groove portion 32 of the wire as a whole. You may make it look like. Moreover, although the planar shape of the groove 31A and the groove 32A is substantially circular, other shapes such as a rectangle and a parallelogram may be used.

図6は、芯線圧着部23の他の態様を示した断面図である。この断面図は図4(b)で示した芯線圧着部の断面図と同様のものであるが、圧着端子20の芯線圧着部23は、圧着刃型によって矢印Aおよび矢印Bに示す4か所から圧着され、下面側が凸となる形状に変形されることを特徴とする。このような芯線圧着部23において、圧着端子20は図面上方に位置する2つの角部51と、図面下方に位置する2つの角部52とを有し、これら角部51,52において他の部分よりも肉薄になりやすい。この場合には、上方の角部51および下方の角部52に第1溝部31および第2溝部32が形成されない第1平坦部33を形成することもできるし、上方の角部51にのみ第1平坦部33を形成することもできる。このように、肉薄になりやすい部分に第1平坦部33を設けることによって、この部分における亀裂発生を抑制することができる。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。   FIG. 6 is a cross-sectional view showing another aspect of the core wire crimping portion 23. This cross-sectional view is the same as the cross-sectional view of the core wire crimping portion shown in FIG. 4B, but the core wire crimping portion 23 of the crimp terminal 20 has four locations indicated by arrows A and B depending on the crimping blade type. And is deformed into a shape in which the lower surface side is convex. In such a core wire crimping part 23, the crimp terminal 20 has two corners 51 located in the upper part of the drawing and two corners 52 located in the lower part of the figure. It tends to be thinner than. In this case, the first flat portion 33 in which the first groove portion 31 and the second groove portion 32 are not formed can be formed in the upper corner portion 51 and the lower corner portion 52, or the first flat portion 33 can be formed only in the upper corner portion 51. One flat portion 33 can also be formed. As described above, by providing the first flat portion 33 in the portion that is likely to be thin, the occurrence of cracks in this portion can be suppressed. 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…芯線
20…圧着端子
22A…側縁
22B…側縁
23…芯線圧着部
23A…上部
23B…下部
24…被覆圧着部
25…接合部
26…連続部
27…底部
31…第1溝部
32…第2溝部
33…第1平坦部
34…第2平坦部
X…長手方向
Y…幅方向
DESCRIPTION OF SYMBOLS 1 ... Wire harness 10 ... Electric wire 11 ... Exposed part 12 ... Cover part 15 ... Insulator 16 ... Core wire 20 ... Crimp terminal 22A ... Side edge 22B ... Side edge 23 ... Core wire crimp part 23A ... Upper part 23B ... Lower part 24 ... Cover crimp part 25 ... Joining part 26 ... Continuous part 27 ... Bottom part 31 ... First groove part 32 ... Second groove part 33 ... First flat part 34 ... Second flat part X ... Longitudinal direction Y ... Width direction

Claims (3)

導電性の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露出する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と、前記露出部に圧着される芯線圧着部とを有する圧着端子と
を含むワイヤハーネスであって、
前記芯線圧着部は、前記芯線を介して対向する上部および下部と、前記上部および前記下部を連続する一対の連続部と、前記上部および前記下部のそれぞれの対向面に設けられた第1および第2溝部と、前記連続部に位置する第1平坦部とを含み、
前記芯線圧着部は、板状部材の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、
前記芯線圧着部はU字形状であり、U字形状開口端に前記第1平坦部を設け、前記連続部の間をU字底部とする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 conductive core wire is covered with an insulator and an exposed portion exposed from a longitudinal tip of the covering portion;
A wire harness including a crimping terminal having a coated crimping part to be crimped to the covering part and a core crimping part to be crimped to the exposed part,
The core wire crimping portion includes an upper portion and a lower portion that are opposed to each other via the core wire, a pair of continuous portions that are continuous between the upper portion and the lower portion, and first and first portions that are provided on respective facing surfaces of the upper portion and the lower portion. and second groove, and a first flat portion positioned on the continuous portion seen including,
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,
The said core wire crimping | compression-bonding part is U-shaped, provides the said 1st flat part in a U-shaped opening end, and makes the U-shaped bottom part between the said continuous parts, The wire harness characterized by the above-mentioned .
導電性の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露出する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と、前記露出部に圧着される芯線圧着部とを有する圧着端子と
を含むワイヤハーネスであって、
前記芯線圧着部は、前記芯線を介して対向する上部および下部と、前記上部および前記下部を連続する一対の連続部と、前記上部および前記下部のそれぞれの対向面に設けられた第1および第2溝部と、前記連続部に位置する第1平坦部とを含み、
前記芯線圧着部は、板状部材の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、
前記芯線圧着部は上方下方に2か所の角部を有する略矩形状であり、前記角部に前記第1平坦部が位置する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 conductive core wire is covered with an insulator and an exposed portion exposed from a longitudinal tip of the covering portion;
A wire harness including a crimping terminal having a coated crimping part to be crimped to the covering part and a core crimping part to be crimped to the exposed part,
The core wire crimping portion includes an upper portion and a lower portion that are opposed to each other via the core wire, a pair of continuous portions that are continuous between the upper portion and the lower portion, and first and first portions that are provided on respective facing surfaces of the upper portion and the lower portion. and second groove, and a first flat portion positioned on the continuous portion seen including,
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,
The wire harness characterized in that the core wire crimping part has a substantially rectangular shape having two corners at the upper and lower sides, and the first flat part is located at the corner.
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または2に記載のワイヤハーネス。   The wire harness according to claim 1 or 2, wherein the core wire is made of an aluminum-based material, and the core wire crimping portion is made of a copper-based material.
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