JP5739923B2 - Wire harness, terminal, and connection method of terminal and coated conductor - Google Patents

Wire harness, terminal, and connection method of terminal and coated conductor Download PDF

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JP5739923B2
JP5739923B2 JP2013032373A JP2013032373A JP5739923B2 JP 5739923 B2 JP5739923 B2 JP 5739923B2 JP 2013032373 A JP2013032373 A JP 2013032373A JP 2013032373 A JP2013032373 A JP 2013032373A JP 5739923 B2 JP5739923 B2 JP 5739923B2
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crimping
coated
terminal
wire
conductor
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JP2014164824A (en
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博 折戸
博 折戸
泰 木原
泰 木原
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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Description

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

従来、自動車、OA機器、家電製品等の分野において、電力線や信号線として、ワイヤハーネスが用いられている。ワイヤハーネスは、電線に取り付けられ他の機器等との接続に用いられる圧着端子を含む。電線は、絶縁体で被覆された被覆部と、被覆部先端から芯線が露出する導体部分の露出部とを有し、圧着端子が被覆部および露出部のそれぞれに圧着されることによって、導電性のワイヤハーネスが構成される。軽量化の観点から、芯線材料としてアルミニウムを用いた電線が注目される。圧着端子としては、電気特性に優れる銅が使用されることが多い。   Conventionally, wire harnesses are used as power lines and signal lines in the fields of automobiles, OA equipment, home appliances, and the like. The wire harness includes a crimp terminal that is attached to an electric wire and used for connection to other devices. The electric wire has a covering portion coated with an insulator and an exposed portion of the conductor portion where the core wire is exposed from the tip of the covering portion, and the crimping terminal is crimped to each of the covering portion and the exposed portion, thereby providing conductivity. The wire harness is configured. From the viewpoint of weight reduction, an electric wire using aluminum as a core wire material is attracting attention. As the crimp terminal, copper having excellent electrical characteristics is often used.

例えばアルミニウムと銅のような異種金属の接触部分に水分が付着すると、標準電極電位の違いから、いわゆる電食が発生する恐れがある。特に、アルミニウムと銅との標準電極電位差は大きいから、電気的に卑であるアルミニウム側の腐食が進行する。このため、芯線と圧着端子との接続状態が不安定となり、接触抵抗の増加や線径の減少による電気抵抗の増大、さらには断線が生じて電装部品の誤動作、機能停止に至る恐れがある。   For example, when moisture adheres to a contact portion of different metals such as aluminum and copper, so-called galvanic corrosion may occur due to a difference in standard electrode potential. In particular, since the standard electrode potential difference between aluminum and copper is large, corrosion on the aluminum side, which is electrically base, proceeds. For this reason, the connection state between the core wire and the crimp terminal becomes unstable, and there is a risk that an increase in contact resistance or an increase in electrical resistance due to a decrease in the wire diameter, or a disconnection, leading to malfunction of an electrical component or a malfunction.

このような異種金属が接触するワイヤハーネスにおいて、電線と圧着端子との接続部を覆うように樹脂材を充填したものがある(特許文献1)。樹脂材を充填することによって、電線と圧着端子との接触部分に水分が付着するのを防止することができる。   Among such wire harnesses in contact with different types of metals, there is one in which a resin material is filled so as to cover a connection portion between an electric wire and a crimp terminal (Patent Document 1). By filling the resin material, it is possible to prevent moisture from adhering to the contact portion between the electric wire and the crimp terminal.

特開2004−111058号公報JP 2004-111058 A

しかし、特許文献1の方法では、樹脂材を別途充填しなければならないので、製造工程が複雑になり、その分、製造工程における管理も複雑化するという問題が生じる。また、工程が複雑になった分、ワイヤハーネス全体のコストも上がってしまう。従って、樹脂材を用いない止水方法が望まれている。     However, in the method of Patent Document 1, since the resin material must be separately filled, the manufacturing process becomes complicated, and accordingly, the management in the manufacturing process becomes complicated. In addition, the cost of the entire wire harness increases due to the complexity of the process. Therefore, a water stop method that does not use a resin material is desired.

本発明は、このような問題に鑑みてなされたもので、樹脂材を用いずに電線との接触部分への水分の付着を予防可能であり、かつ、製造工程の簡略化を図ることが可能な圧着端子およびこ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 can prevent moisture from adhering to a contact portion with an electric wire without using a resin material, and can simplify the manufacturing process. An object is to provide a simple crimp terminal and a wire harness using the crimp terminal.

前述した目的を達するために第1の発明は、被覆導線と端子とが接続されるワイヤハーネスであって、前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記導線圧着部は、前記被覆圧着部より圧縮量が大きく、前記導線圧着部と前記被覆圧着部との境界部には圧縮量が徐々に変化するテーパ部が形成され、前記圧着部に前記被覆導線が挿入され、前記圧着部で前記被覆導線が圧着された際に、前記テーパ部の内面の少なくとも一部に前記圧着部の内面に突出する凸部が形成され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 is a wire harness in which a coated conductor and a terminal are connected, and the terminal includes a crimping portion to which the coated conductor is crimped, and a terminal body, The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. The lead wire crimping portion has a compression amount larger than that of the coated crimp portion, and a taper portion where the compression amount gradually changes is formed at a boundary portion between the lead wire crimp portion and the sheath crimp portion, When the covered conducting wire is inserted into the portion and the covered conducting wire is crimped by the crimping portion, a convex portion protruding from the inner surface of the crimping portion is formed on at least a part of the inner surface of the tapered portion. A wire harness.

前記導線と前記被覆部との間の外径段差部に対応する位置の少なくとも一部に、前記凸部が形成されてもよい。   The convex portion may be formed at least at a part of the position corresponding to the outer diameter step portion between the conductive wire and the covering portion.

前記凸部は、前記圧着部の周方向に連続して形成されてもよい。   The convex portion may be formed continuously in the circumferential direction of the crimping portion.

第1の発明によれば、導線を強圧着し、被覆部を相対的に弱く圧着した場合であっても、圧縮後の導線と被覆部との境界のテーパ部に形成されるエア溜りを、凸部によって小さくすることができる。このようなエア溜りは、使用時において、熱膨張を起こす恐れがある。この場合、エアが被覆部を圧縮して、外部に逃げる。この際、エアの流路から、水分が浸入する恐れがある。したがって、このようなエア溜りはできるだけ小さくすることが望ましい。本発明では、凸部によってテーパ部により生じる空間が縮小されるため、エア漏れやエア漏れに伴う水の浸入を抑制することができる。   According to the first invention, even if the lead wire is strongly pressure-bonded and the cover portion is pressure-bonded relatively weakly, the air reservoir formed at the taper portion at the boundary between the lead wire and the cover portion after compression, It can be reduced by the convex portion. Such an air reservoir may cause thermal expansion during use. In this case, air compresses the covering portion and escapes to the outside. At this time, moisture may enter from the air flow path. Therefore, it is desirable to make such an air reservoir as small as possible. In this invention, since the space which a taper part produces by a convex part is shrunk | reduced, the permeation of water accompanying air leak or air leak can be suppressed.

また、このような凸部が導線と被覆部との境界の外径段差部に形成されることで、確実に外径段差部に対応する位置のエア溜りの発生を抑制することができる。   Further, by forming such a convex portion at the outer diameter step portion at the boundary between the conducting wire and the covering portion, it is possible to reliably suppress the occurrence of an air pool at a position corresponding to the outer diameter step portion.

また、凸部が周方向に連続して形成されることで、テーパ部および被覆部と導線部との境界の外径段差部の全周に対して、エア溜りの発生を抑制することができる。   In addition, since the convex portions are continuously formed in the circumferential direction, the occurrence of air accumulation can be suppressed with respect to the entire circumference of the outer diameter step portion at the boundary between the tapered portion and the covering portion and the conducting wire portion. .

第2の発明は、被覆導線と接続される端子であって、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記圧着部に前記被覆導線が挿入され、前記圧着部で前記被覆導線が圧着された際に、前記導線と前記被覆部との境界近傍のテーパ部に対応する位置の少なくとも一部に、前記圧着部の内面に突出する凸部が形成されることを特徴とする端子である。   The second invention is a terminal connected to the coated conductor, and has a crimped portion to which the coated conductor is crimped, and a terminal body, and the crimped portion is a coated crimped portion that crimps the coated portion; A conductive wire crimping portion that crimps the conductive wire exposed from the covering portion, except for a portion where the coated conductive wire is inserted, and other portions are sealed, and the coated conductive wire is inserted into the crimping portion, When the coated conductor is crimped by the crimping portion, a convex portion protruding from the inner surface of the crimping portion is formed in at least a part of the position corresponding to the tapered portion in the vicinity of the boundary between the conductor and the coating portion. It is a terminal characterized by this.

第2の発明によれば、被覆電線と接続した際に、被覆部と導線部との境界のテーパ部に形成されるエア溜りを抑制することが可能な端子を得ることができる。   According to the second aspect of the invention, it is possible to obtain a terminal capable of suppressing air accumulation formed in the tapered portion at the boundary between the covering portion and the conductor portion when connected to the covered electric wire.

第3の発明は、端子と被覆導線との接続する方法であって、前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記圧着部の内面の少なくとも一部は内面に突出する凸部が形成されており、前記圧着部に前記被覆導線を挿入し、前記導線圧着部が前記被覆圧着部より圧縮量が大きく、前記導線圧着部と前記被覆圧着部との境界部には圧縮量が徐々に変化するテーパ部を形成するように前記圧着部で前記被覆導線を圧着し、この際に、前記凸部を前記テーパ部に対応する位置の少なくとも一部に位置するように前記圧着部を圧着することを特徴とする端子と被覆導線の接続方法である。   A third invention is a method of connecting a terminal and a coated conductor, wherein the terminal includes a crimping portion to which the coated conductor is crimped, and a terminal body, and the crimping portion crimps the sheath. And a lead wire crimping part for crimping the conductor wire exposed from the sheath part, and other parts are sealed except for the part into which the sheathed conductor wire is inserted, and the inner surface of the crimp part At least part of which is formed with a protrusion protruding on the inner surface, the covered conductor is inserted into the crimping portion, and the conductor crimping portion has a larger compression amount than the coated crimping portion, and the conductor crimping portion and the coating The coated conductor is crimped by the crimping portion so as to form a tapered portion where the amount of compression gradually changes at the boundary with the crimping portion, and at this time, the convex portion is at least at a position corresponding to the tapered portion. The crimping part is crimped so as to be located in a part A terminal and covered wire connection method of.

第3の発明によれば、被覆部と導線部との境界のテーパ部に形成されるエア溜りを抑制することが可能な端子と被覆導線の接続方法を得ることができる。   According to the third invention, it is possible to obtain a connection method between a terminal and a covered conductor capable of suppressing air accumulation formed in a tapered portion at the boundary between the covering portion and the conductor portion.

本発明によれば、樹脂材を用いずに電線との接触部分への水分の付着を予防可能であり、かつ、製造工程の簡略化を図ることが可能な圧着端子およびこ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。   According to the present invention, it is possible to prevent moisture from adhering to a contact portion with an electric wire without using a resin material, and to use the crimp terminal capable of simplifying the manufacturing process. A wire harness can be provided.

ワイヤハーネス1を示す分解斜視図。The exploded perspective view which shows the wire harness 1. FIG. 図1のA−A線断面図。AA sectional view taken on the line AA of FIG. ワイヤハーネスの圧着方法の説明図。Explanatory drawing of the crimping method of a wire harness. 圧着後のワイヤハーネス1の斜視図。The perspective view of the wire harness 1 after crimping | compression-bonding. 図4のB−B線断面図。BB sectional drawing of FIG. 圧着後の被覆部と電線との境界のテーパ部近傍の部分の拡大図であって、(a)は、凸部がない場合のエア溜り27を示す図、(b)は、凸部25bを設けた状態を示す図。It is an enlarged view of a portion in the vicinity of the tapered portion at the boundary between the covering portion and the electric wire after crimping, (a) is a diagram showing an air reservoir 27 when there is no convex portion, (b) is a diagram showing the convex portion 25b. The figure which shows the state provided.

以下、図面を参照しながら、本発明の実施形態について説明する。図1はワイヤハーネス1の分解斜視図であって、加締め前の状態を示し、図2は図1のA−A線断面図である。ワイヤハーネス1は、電線10と圧着端子20とを有する。電線10は、絶縁被覆部12と芯線露出部11を有する。絶縁被覆部12は、導電性を有する芯線16が絶縁体で被覆されて構成される。芯線露出部11は、絶縁被覆部12の長手方向X先端から芯線16の一部が露出する部位である。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される。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the wire harness 1 and shows a state before caulking, and FIG. 2 is a cross-sectional view taken along line AA of FIG. The wire harness 1 includes an electric wire 10 and a crimp terminal 20. The electric wire 10 has an insulating coating portion 12 and a core wire exposed portion 11. The insulation coating portion 12 is configured by covering a conductive core wire 16 with an insulator. The core wire exposed portion 11 is a portion where a part of the core wire 16 is exposed from the tip end in the longitudinal direction X of the insulating coating portion 12. 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.

圧着端子20は、端子本体21と、圧着部22とを有する。端子本体21は、長手方向Xの前端部20Aから、図示しない雄型コネクタを挿入可能である。端子本体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。圧着部22は、後端部20Bから電線10を挿入可能である。   The crimp terminal 20 includes a terminal body 21 and a crimp part 22. The terminal main body 21 can be inserted with a male connector (not shown) from the front end 20 </ b> A in the longitudinal direction X. The terminal body 21 includes an elastic contact piece 21A that comes into contact with the insertion tab of the male connector. The crimp part 22 can insert the electric wire 10 from the rear end part 20B.

圧着部22は、導線圧着部23と、被覆圧着部24とを有する。導線圧着部23は、被覆圧着部24と端子本体21との間に位置する。被覆圧着部24は、後端部20Bに開口するとともに、電線10が後端部20Bから挿入可能なように、長手方向Xへ延びる断面中空の略円筒形状を有する。   The crimping part 22 has a lead crimping part 23 and a covering crimping part 24. The conducting wire crimping portion 23 is located between the covering crimping portion 24 and the terminal main body 21. The covering crimping part 24 has a substantially cylindrical shape with a hollow cross section that extends in the longitudinal direction X so that the electric wire 10 can be inserted from the rear end part 20B while opening to the rear end part 20B.

圧着端子20は、例えばプレス加工により製造される。この場合、まず、表面が錫メッキされた黄銅等の銅合金条を、端子を平面展開した形状に打ち抜く。次いで、中空四角柱体の端子本体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する。   The crimp terminal 20 is manufactured by, for example, press working. In this case, first, a copper alloy strip such as brass whose surface is tin-plated is punched into a shape in which the terminal is flattened. Next, it is bent into a three-dimensional terminal shape composed of a terminal body 21 of a hollow rectangular column and a crimping portion 22 of a hollow cylinder.

さらに、圧着部22が水密になるように、封止される。詳細には、圧着部形状に円状に形成された縁部同士を互いに突合せ、接合部29を形成する。また、圧着部22の端子本体21側の端部がつぶされて、封止部26が設けられる。接合部29および封止部26は、例えばレーザ溶接等によって溶接される。   Further, the crimping part 22 is sealed so as to be watertight. Specifically, the edge portions formed in a circular shape in the crimping portion shape are butted against each other to form the joint portion 29. Further, the end of the crimping portion 22 on the terminal body 21 side is crushed to provide the sealing portion 26. The joint portion 29 and the sealing portion 26 are welded by, for example, laser welding.

このようにすることで、圧着部22は、略筒状の中空体となり、内部に空間が形成される。この結果、電線10が挿入される後端部20Bを除き、圧着部22は、周方向および一方の端部が封止される。   By doing in this way, the crimping | compression-bonding part 22 becomes a substantially cylindrical hollow body, and space is formed in an inside. As a result, the crimping portion 22 is sealed in the circumferential direction and one end portion except for the rear end portion 20B into which the electric wire 10 is inserted.

上記のような圧着部22において、被覆圧着部24の内面には、中心方向へ突出する凸部25a、25bが形成される。凸部25a、25bは、被覆圧着部24の周方向において環状に形成される。   In the crimping part 22 as described above, convex portions 25 a and 25 b projecting in the center direction are formed on the inner surface of the covering crimping part 24. The convex portions 25 a and 25 b are formed in an annular shape in the circumferential direction of the covering crimping portion 24.

なお、芯線16を覆う絶縁被覆部12としては、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 addition, as the insulation coating part 12 which covers the core wire 16, what is normally used in the field | area of this technique, such as polyvinyl chloride (PVC) and polyethylene, can be selected.

このようにすることで、後述する圧着後において、圧着部22の後端部側(電線挿入側)を被覆圧着部24と絶縁被覆部12との密着によって水密に封止することができる。この際、圧着部22の後端部側以外の他の部位は、接合部29および封止部26によって水密に封止することで、圧着部22への水分の浸入を防止することができる。   By doing in this way, after the crimping | compression-bonding mentioned later, the rear-end part side (electric wire insertion side) of the crimping | compression-bonding part 22 can be sealed watertight by contact | adherence with the covering crimping | compression-bonding part 24 and the insulation coating part 12. At this time, the other portion other than the rear end portion side of the crimping portion 22 is sealed in a watertight manner by the joint portion 29 and the sealing portion 26, thereby preventing moisture from entering the crimping portion 22.

次に、ワイヤハーネス1の圧着方法について説明する。図3はワイヤハーネス1の圧着方法を示す概略図である。図示したように、導線圧着部23および被覆圧着部24は、圧着工具30によって圧着することができる。圧着工具30は、上金型31と下金型32とによって構成される。上金型31は、略半円状である。上金型31は、大径部34と、大径部34よりも小さい半径を有する小径部33とを備える。大径部34は、被覆圧着部24に対応する。小径部33は、導線圧着部23に対応する。   Next, a method for crimping the wire harness 1 will be described. FIG. 3 is a schematic view showing a method for crimping the wire harness 1. As illustrated, the lead wire crimping portion 23 and the covering crimping portion 24 can be crimped by the crimping tool 30. The crimping tool 30 includes an upper mold 31 and a lower mold 32. The upper mold 31 is substantially semicircular. The upper mold 31 includes a large diameter portion 34 and a small diameter portion 33 having a radius smaller than that of the large diameter portion 34. The large diameter portion 34 corresponds to the coated crimping portion 24. The small diameter portion 33 corresponds to the conductor crimping portion 23.

導線圧着部23は、被覆圧着部24よりも圧縮量が大きく、強く圧着される。すなわち、大径部34と小径部33との間には、徐々に圧縮量が変化するテーパ部が形成される。   The lead wire crimping portion 23 has a larger compression amount than the coated crimping portion 24 and is strongly crimped. That is, between the large diameter part 34 and the small diameter part 33, a taper part in which the amount of compression gradually changes is formed.

小径部33および大径部34のいずれも、加締め前の圧着部22の直径よりも、その径が小さい。下金型32は、略半円状であり、導線圧着部23および被覆圧着部24に対応するいずれの部分もその半径は同じである。なお、上金型31と下金型32とを組み合わせることで、断面略円状に、圧縮対象を圧縮することができる。なお、圧縮部の形状は、図示した例に限られず、円形以外の形状で圧着することもできる。   Both the small diameter portion 33 and the large diameter portion 34 have a diameter smaller than the diameter of the crimping portion 22 before caulking. The lower mold 32 has a substantially semicircular shape, and the radii of the portions corresponding to the conductor crimping portion 23 and the covering crimping portion 24 are the same. In addition, by combining the upper mold 31 and the lower mold 32, the compression target can be compressed in a substantially circular cross section. The shape of the compression portion is not limited to the illustrated example, and the compression portion can be crimped in a shape other than a circle.

図4は、導線圧着部23および被覆圧着部24を径方向内側へ加締めて圧着したワイヤハーネス1を示す斜視図であり、図5は、図4のB−B線断面図である。圧着部22には、電線10が挿入される。この際、導線圧着部23には電線10の芯線露出部11が位置し、被覆圧着部24には絶縁被覆部12が位置するように、電線10が挿入される。圧着部22の長手方向Xにおける寸法は、芯線露出部11の長手方向Xにおける寸法よりも大きい。したがって、電線10を圧着部22に挿入すると、芯線露出部11と絶縁被覆部12との境界部が圧着部22の内周に対向して位置する。   4 is a perspective view showing the wire harness 1 in which the lead wire crimping portion 23 and the covering crimping portion 24 are crimped inward in the radial direction, and FIG. 5 is a cross-sectional view taken along the line BB in FIG. The electric wire 10 is inserted into the crimping part 22. At this time, the electric wire 10 is inserted such that the core wire exposed portion 11 of the electric wire 10 is located in the lead wire crimping portion 23 and the insulating coating portion 12 is located in the covering crimping portion 24. The dimension in the longitudinal direction X of the crimping part 22 is larger than the dimension in the longitudinal direction X of the core wire exposed part 11. Therefore, when the electric wire 10 is inserted into the crimping portion 22, the boundary portion between the core wire exposed portion 11 and the insulating coating portion 12 is positioned to face the inner periphery of the crimping portion 22.

圧着部22に芯線露出部11および絶縁被覆部12を挿入した状態で、前述した金型によって圧着部22が加締められる。これにより、導線圧着部23と芯線露出部11とが圧着され、被覆圧着部24と絶縁被覆部12とが圧着される。   With the core wire exposed portion 11 and the insulating coating portion 12 inserted into the crimp portion 22, the crimp portion 22 is crimped by the above-described mold. Thereby, the conducting wire crimping portion 23 and the core wire exposed portion 11 are crimped, and the covering crimping portion 24 and the insulating coating portion 12 are crimped.

被覆圧着部24には、凸部25a、25bが設けられる。圧着部22を加締めると、凸部25aは、絶縁被覆部12の外周面に対して他の部分よりも強圧着することができる。したがって、絶縁被覆部12には強圧着部13が形成される。   The covering crimping portion 24 is provided with convex portions 25a and 25b. When the crimping portion 22 is caulked, the convex portion 25 a can be pressed against the outer peripheral surface of the insulating coating portion 12 more strongly than other portions. Therefore, the strong pressure bonding portion 13 is formed in the insulating coating portion 12.

なお、前述したように、導線圧着部23は被覆圧着部24よりも圧縮量が大きく、強く圧着されるため、導線圧着部23と被覆圧着部24との間に徐々に圧縮量が変化するテーパ部28が形成される。すなわち、テーパ部28は、絶縁被覆部12と芯線露出部11との境界部近傍の外周部に形成される。   As described above, the lead wire crimping portion 23 has a larger compression amount than that of the cover crimping portion 24 and is strongly crimped. Therefore, the taper in which the compression amount gradually changes between the lead wire crimping portion 23 and the sheath crimping portion 24. A portion 28 is formed. That is, the tapered portion 28 is formed on the outer peripheral portion in the vicinity of the boundary portion between the insulating coating portion 12 and the core wire exposed portion 11.

テーパ部28には、凸部25bが設けられる。凸部25bは、テーパ部28のどこに位置されてもよい。すなわち、圧着後にテーパ部28に対応するいずれかの位置にあらかじめ凸部25bが設けられる。なお、テーパ部28は、端子の上面にのみ形成される例を示したが、全周にわたってテーパ部28が形成されてもよい。   The taper portion 28 is provided with a convex portion 25b. The convex portion 25 b may be located anywhere on the tapered portion 28. That is, the convex portion 25b is provided in advance at any position corresponding to the tapered portion 28 after crimping. In addition, although the taper part 28 showed the example formed only in the upper surface of a terminal, the taper part 28 may be formed over the perimeter.

また、さらに望ましくは、凸部25bは、絶縁被覆部12と芯線露出部11との境界部近傍に形成される外径段差部に対応する位置に設けられる。ここで、絶縁被覆部12と芯線露出部11とは、圧着前の状態で外径が異なる。このため、絶縁被覆部12と芯線露出部11との境界には、外径が変化する外径段差部が形成される。このように、凸部25bは、絶縁被覆部12と芯線露出部11との間に形成される外径段差部に対応する位置に設けられることが望ましい。   More desirably, the convex portion 25 b is provided at a position corresponding to an outer diameter step portion formed in the vicinity of the boundary portion between the insulating coating portion 12 and the core wire exposed portion 11. Here, the insulation coating portion 12 and the core wire exposed portion 11 have different outer diameters before being crimped. For this reason, an outer diameter step portion whose outer diameter changes is formed at the boundary between the insulating coating portion 12 and the core wire exposed portion 11. Thus, it is desirable that the convex portion 25 b is provided at a position corresponding to the outer diameter step portion formed between the insulating coating portion 12 and the core wire exposed portion 11.

図6は、絶縁被覆部12と芯線露出部11との間に形成されるテーパ部28近傍の拡大図である。図6(a)に示すように、テーパ部28近傍に凸部25bのような形状を有さないと、テーパ形状に応じたエア溜り27が形成される。これは、導線圧着部23と被覆圧着部24とは圧縮量が異なり、その境界にテーパ部28が形成されるが、内部の絶縁被覆部12と芯線露出部11は、このテーパ形状に完全に追従できないためである。このようなエア溜りが生じると、使用時において、エアが熱膨張する恐れがある。この場合、エアが絶縁被覆部12と被覆圧着部24との隙間から外部に逃げる。この際、エアの流路から、水分が浸入する恐れがある。したがって、このようなエア溜りはできるだけ小さくすることが望ましい。   FIG. 6 is an enlarged view of the vicinity of the tapered portion 28 formed between the insulating coating portion 12 and the core wire exposed portion 11. As shown in FIG. 6A, if there is no shape like the convex portion 25b in the vicinity of the tapered portion 28, an air reservoir 27 corresponding to the tapered shape is formed. This is because the lead wire crimping portion 23 and the sheath crimping portion 24 have different compression amounts, and a tapered portion 28 is formed at the boundary between them, but the inner insulation coating portion 12 and the core wire exposed portion 11 are completely in this tapered shape. This is because it cannot follow. If such an air pool occurs, the air may thermally expand during use. In this case, air escapes from the gap between the insulating coating portion 12 and the coating crimping portion 24 to the outside. At this time, moisture may enter from the air flow path. Therefore, it is desirable to make such an air reservoir as small as possible.

これに対し、図6(b)に示すように、本発明では、テーパ部28に絶縁被覆部12と芯線露出部11の境界部が位置する。また、テーパ部28には凸部25bが設けられる。したがって、テーパ部28や外径段差部によって形成される、エア溜りに対して、凸部25bが突出し、この空間が縮小される。このため、エア漏れやエア漏れに伴う水の浸入を抑制することができる。   On the other hand, as shown in FIG. 6B, in the present invention, the boundary portion between the insulating coating portion 12 and the core wire exposed portion 11 is located in the tapered portion 28. The tapered portion 28 is provided with a convex portion 25b. Therefore, the convex portion 25b protrudes from the air reservoir formed by the tapered portion 28 and the outer diameter step portion, and this space is reduced. For this reason, infiltration of water accompanying air leakage and air leakage can be suppressed.

以上説明したように、本発明によれば、圧着部22の内部のエア溜りの発生を抑制することができる。したがって、エアの漏れや、エア膨張時における水分の浸入などを抑制することができる。このため、例えば、電線10の芯線16がアルミニウム系材料で構成され、圧着端子20の導線圧着部23が銅系材料で構成されるような、異種金属が接触する部位に対して、水分の浸入を防止し、電食を防止することができる。   As described above, according to the present invention, it is possible to suppress the occurrence of air accumulation inside the crimping portion 22. Accordingly, it is possible to suppress air leakage and moisture intrusion during air expansion. For this reason, for example, the penetration of moisture into a portion where a different metal contacts, such as the core wire 16 of the electric wire 10 made of an aluminum material and the lead wire crimping portion 23 of the crimp terminal 20 made of a copper material. Can be prevented and electric corrosion can be prevented.

また、通常、導線圧着部23は、被覆圧着部24よりも強く圧着する必要があるため、導線圧着部23と被覆圧着部24との間には、圧縮量が徐々に変化するテーパ部28が形成される。したがって、テーパ部28に凸部25bを配置することで、確実に絶縁被覆部12と芯線露出部11との境界近傍に形成される空間に凸部25bを配置することができる。   In general, since the lead wire crimping portion 23 needs to be crimped more strongly than the covering crimp portion 24, a taper portion 28 whose compression amount gradually changes is provided between the lead wire crimping portion 23 and the covering crimp portion 24. It is formed. Therefore, by arranging the convex portion 25 b on the tapered portion 28, the convex portion 25 b can be reliably arranged in the space formed in the vicinity of the boundary between the insulating coating portion 12 and the core wire exposed portion 11.

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.

例えば、凸部25a、25bの断面形状は図示した形状に限定するものではない。その断面形状が、半円形、三角形などの多角形等を有するものであってもよい。また、凸部25a、25bの径方向内側部分の断面形状が、長手方向Xに平行延びる軸線に傾斜するようにしてもよい。すなわち、前端部20A側から後端部20B側に向かってその径が大きくなるように傾斜していてもよい。このように傾斜することによって、後端部20B側から電線10を挿入したときには比較的挿入しやすいが、その逆方向には移動しにくく、挿入した電線10を抜けにくくすることができる。   For example, the cross-sectional shape of the convex portions 25a and 25b is not limited to the illustrated shape. The cross-sectional shape may be a semicircle, a polygon such as a triangle, or the like. Moreover, the cross-sectional shape of the radially inner portions of the convex portions 25a and 25b may be inclined to an axis extending in parallel with the longitudinal direction X. That is, you may incline so that the diameter may become large toward the rear end part 20B side from the front end part 20A side. By inclining in this way, when the electric wire 10 is inserted from the rear end 20B side, it is relatively easy to insert, but it is difficult to move in the opposite direction, and the inserted electric wire 10 can be made difficult to come off.

また、凸部25bは、周方向に連続した環状に形成する例を示したが、本発明はこれに限られない。例えば、上部および下部にのみ凸部25bを形成し、圧着部の側方は、平滑にしてもよい。この場合、圧縮方向の上下に凸部25bを配置することで、圧着時に、凸部25bを段差部に押し込むことができる。このように、凸部25bは段差部に対応する部位の少なくとも一部に形成されればよい。   Moreover, although the convex part 25b showed the example formed in the cyclic | annular form continuous in the circumferential direction, this invention is not limited to this. For example, the convex portions 25b may be formed only at the upper and lower portions, and the sides of the crimping portion may be smooth. In this case, by disposing the convex portions 25b above and below in the compression direction, the convex portions 25b can be pushed into the stepped portions during crimping. Thus, the convex part 25b should just be formed in at least one part of the site | part corresponding to a level | step difference part.

また、本発明では、凸部25a、25bの両方を形成する例を示したが、本発明はこれに限られない。例えば、凸部25bのみであっても、前述したエア溜りの生成を抑制する効果を得ることができる。したがって、本発明では、凸部25aは、必ずしも必要ではない。また、逆に凸部25aを複数個所に形成することもできる。   Moreover, although the example which forms both convex part 25a, 25b was shown in this invention, this invention is not limited to this. For example, even with only the convex portion 25b, it is possible to obtain the effect of suppressing the generation of the air pool described above. Therefore, the convex part 25a is not necessarily required in the present invention. Conversely, the convex portions 25a can be formed at a plurality of locations.

1…ワイヤハーネス
10…電線
11…芯線露出部
12…絶縁被覆部
13…強圧着部
16…芯線
20…圧着端子
20A…前端部
20B…後端部
21…端子本体
21A…弾性接触片
22…圧着部
23…導線圧着部
24…被覆圧着部
25a、25b…凸部
26…封止部
27…エア溜り
28…テーパ部
29…接合部
30…圧着工具
31…上金型
32…下金型
33…小径部
34…大径部
DESCRIPTION OF SYMBOLS 1 ... Wire harness 10 ... Electric wire 11 ... Core wire exposed part 12 ... Insulation coating | cover part 13 ... Strong crimp part 16 ... Core wire 20 ... Crimp terminal 20A ... Front end part 20B ... Rear end part 21 ... Terminal body 21A ... Elastic contact piece 22 ... Crimp Part 23 ... Conductive wire crimping part 24 ... Cover crimping part 25a, 25b ... Convex part 26 ... Sealing part 27 ... Air reservoir 28 ... Taper part 29 ... Joining part 30 ... Crimping tool 31 ... Upper mold 32 ... Lower mold 33 ... Small diameter part 34 ... Large diameter part

Claims (5)

被覆導線と端子とが接続されるワイヤハーネスであって、
前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
前記導線圧着部は、前記被覆圧着部より圧縮量が大きく、前記導線圧着部と前記被覆圧着部との境界部には圧縮量が徐々に変化するテーパ部が形成され、
前記圧着部に前記被覆導線が挿入され、前記圧着部で前記被覆導線が圧着された際に、
前記テーパ部の内面の少なくとも一部に前記圧着部の内面に突出する凸部が形成されることを特徴とするワイヤハーネス。
A wire harness in which a coated conductor and a terminal are connected,
The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. Has been
The lead wire crimping portion has a larger compression amount than the coated crimp portion, and a taper portion in which the compression amount gradually changes is formed at the boundary between the lead crimp portion and the sheath crimp portion,
When the coated conductor is inserted into the crimp portion, and the coated conductor is crimped at the crimp portion,
The wire harness according to claim 1, wherein at least a part of the inner surface of the tapered portion is formed with a convex portion protruding from the inner surface of the crimping portion.
前記導線と前記被覆部との間の外径段差部に対応する位置の少なくとも一部に、前記凸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 wire harness according to claim 1, wherein the convex portion is formed at least at a part of a position corresponding to an outer diameter step portion between the conductor and the covering portion. 前記凸部は、前記圧着部の周方向に連続して形成されることを特徴とする請求項1または請求項2記載のワイヤハーネス。   The wire harness according to claim 1, wherein the convex portion is continuously formed in a circumferential direction of the crimping portion. 被覆導線と接続される端子であって、
前記被覆導線が圧着される圧着部と、端子本体とを有し、
前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
前記圧着部に前記被覆導線が挿入され、前記圧着部で前記被覆導線が圧着された際に、前記導線と前記被覆部との境界近傍のテーパ部に対応する位置の少なくとも一部に、前記圧着部の内面に突出する凸部が形成されることを特徴とする端子。
A terminal connected to the coated conductor,
A crimping portion to which the coated conductor is crimped, and a terminal body;
The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. Has been
When the coated conducting wire is inserted into the crimping portion and the coated conducting wire is crimped by the crimping portion, the crimping is applied to at least a part of the position corresponding to the tapered portion in the vicinity of the boundary between the conducting wire and the coating portion. A terminal characterized in that a convex portion protruding from the inner surface of the portion is formed.
端子と被覆導線との接続する方法であって、
前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
前記圧着部の内面の少なくとも一部は内面に突出する凸部が形成されており、
前記圧着部に前記被覆導線を挿入し、
前記導線圧着部が前記被覆圧着部より圧縮量が大きく、前記導線圧着部と前記被覆圧着部との境界部には圧縮量が徐々に変化するテーパ部を形成するように前記圧着部で前記被覆導線を圧着し、
この際に、前記凸部を前記テーパ部に対応する位置の少なくとも一部に位置するように前記圧着部を圧着することを特徴とする端子と被覆導線の接続方法。
A method of connecting a terminal and a coated conductor,
The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. Has been
At least a part of the inner surface of the pressure-bonding portion is formed with a convex portion protruding from the inner surface,
Insert the coated conductor into the crimping part,
The wire crimping part has a larger compression amount than the coated crimping part, and the crimping part covers the covering part so as to form a taper part where the compression amount gradually changes at the boundary between the conductor crimping part and the coating crimping part. Crimp the conductor,
In this case, the terminal and the covered conductor are connected to each other, wherein the crimping portion is crimped so that the convex portion is located at least at a part of the position corresponding to the tapered portion.
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JP5622314B2 (en) * 2010-10-12 2014-11-12 矢崎総業株式会社 Connector terminal wire connection structure

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