JP7477268B2

JP7477268B2 - Crimp Terminal

Info

Publication number: JP7477268B2
Application number: JP2019131088A
Authority: JP
Inventors: 孝裕松尾
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2024-05-01
Anticipated expiration: 2039-07-16
Also published as: JP2021015761A

Description

本発明は、電線に接続する圧着端子に関する。 The present invention relates to a crimp terminal for connecting to an electric wire.

電線に圧着する圧着端子の従来例が図６～図９に示されている（特許文献１、２参照）。図６及び図７において、圧着端子１１０を接続する電線Ｗは、複数の素線１０１ａからなる芯線１０１と芯線１０１の外周を覆う絶縁外皮１０２とから構成されている。電線Ｗの先端側は、絶縁外皮１０２が除去されて芯線１０１が露出されている。 Conventional examples of crimp terminals that are crimped to electric wires are shown in Figs. 6 to 9 (see Patent Documents 1 and 2). In Figs. 6 and 7, the electric wire W to which the crimp terminal 110 is connected is composed of a core wire 101 made up of multiple strands 101a and an insulating outer sheath 102 that covers the outer periphery of the core wire 101. At the tip side of the electric wire W, the insulating outer sheath 102 has been removed to expose the core wire 101.

圧着端子１１０は、相手端子接続部１１１と電線接続部１１５を有する。電線接続部１１５は、芯線圧着部１１６と外皮圧着部１１７を有する。芯線圧着部１１６は、基底部１１６ａとこの基底部１１６ａの両側から延設された一対の加締め片部１１６ｂを有する。外皮圧着部１１７は、基底部１１７ａとこの基底部１１７ａの両側から延設された一対の加締め片部１１７ｂを有する。 The crimp terminal 110 has a mating terminal connection portion 111 and an electric wire connection portion 115. The electric wire connection portion 115 has a core wire crimping portion 116 and an outer cover crimping portion 117. The core wire crimping portion 116 has a base portion 116a and a pair of crimping pieces 116b extending from both sides of the base portion 116a. The outer cover crimping portion 117 has a base portion 117a and a pair of crimping pieces 117b extending from both sides of the base portion 117a.

圧着端子１１０は、芯線圧着部１１６によって露出された芯線１０１を加締め圧着し、外皮圧着部１１７によって絶縁外皮１０２を加締め圧着している。 The crimp terminal 110 crimps the exposed core wire 101 with the core wire crimping portion 116, and crimps the insulating outer sheath 102 with the outer sheath crimping portion 117.

芯線圧着部１１６の加締め圧着は、加締め治具１４０によって行われる。加締め治具１４０は、図８（ａ）～（ｃ）に示すように、アンビル１４１と、加締め先端側に最終的な加締め外周形状の加締め溝１４２ａを有するクリンパ１４２とを有する。図８（ａ）に示すように、アンビル１４１の上面に芯線圧着部１１６を載置し、上方よりクリンパ１４２を降下させる。すると、図８（ｂ）に示すように、アンビル１４１及びクリンパ１４２が基底部１１６ａ及び一対の加締め片部１１６ｂを押圧して芯線１０１の外周を包み込むように塑性変形すると共に、一対の加締め片部１１６ｂの先端部１２０が芯線１内に食い込む。 The crimping of the core wire crimping portion 116 is performed by a crimping jig 140. As shown in Figs. 8(a) to (c), the crimping jig 140 has an anvil 141 and a crimper 142 having a crimping groove 142a with the final crimped outer periphery shape at the crimping tip side. As shown in Fig. 8(a), the core wire crimping portion 116 is placed on the upper surface of the anvil 141, and the crimper 142 is lowered from above. Then, as shown in Fig. 8(b), the anvil 141 and the crimper 142 press the base portion 116a and the pair of crimping pieces 116b, plastically deforming to encase the outer periphery of the core wire 101, and the tip portions 120 of the pair of crimping pieces 116b bite into the core wire 1.

ここで、一対の加締め片部１１６ｂの先端部１２０には、テーパ面１２０ａが形成されているため、一対の加締め片部１１６ｂの先端部１２０が芯線１０１内に食い込み易い。そして、アンビル１４１とクリンパ１４２による最終加締め位置において、図８（ｃ）に示すように、一対の加締め片部１１６ｂの先端部１２０が芯線１内に十分に食い込んだ状態で加締め圧着される。 Here, the tip 120 of the pair of crimping pieces 116b is formed with a tapered surface 120a, so that the tip 120 of the pair of crimping pieces 116b can easily bite into the core wire 101. Then, at the final crimping position by the anvil 141 and the crimper 142, as shown in FIG. 8(c), the tip 120 of the pair of crimping pieces 116b is crimped and crimped in a state where it is sufficiently bitten into the core wire 1.

特開２００９－１２３６２３号公報JP 2009-123623 A 特開２００３－５９６１２号公報JP 2003-59612 A

しかしながら、図９に示すように、加締め圧着過程にあって、一対の加締め片部１１６ｂの先端部１２０のテーパ面１２０ａには芯線１０１からの反力Ｒ２がそれぞれ作用し、この反力Ｒ２が一対の加締め片部１１６ｂの先端部１２０を互いに離間する方向に作用する。これにより、一対の加締め片部１１６ｂの先端部は、互いに異なる方向に向かって入り込む。そのため、一対の加締め片部１１６ｂの芯線１０１への入り込み寸法が長いと、図７（ｂ）にて仮想線で示すように、芯線１０１が三分割、若しくは三分割に近い状態となる。このような状態になると、各分割領域には圧縮差が発生し、安定した導通抵抗が得られない。 However, as shown in FIG. 9, during the crimping process, a reaction force R2 from the core wire 101 acts on the tapered surfaces 120a of the tip portions 120 of the pair of crimping pieces 116b, and this reaction force R2 acts in a direction that separates the tip portions 120 of the pair of crimping pieces 116b from each other. As a result, the tip portions of the pair of crimping pieces 116b penetrate in different directions. Therefore, if the penetration dimension of the pair of crimping pieces 116b into the core wire 101 is long, the core wire 101 will be divided into three or close to being divided into three, as shown by the virtual lines in FIG. 7(b). In this state, compression differences occur in each divided area, and stable conductive resistance cannot be obtained.

そこで、本発明は、前記した課題を解決すべくなされたものであり、一対の加締め片部の先端が確実に芯線に食い込み、且つ、電線との間で安定した導通抵抗が得られる圧着端子を提供することを目的とする。 The present invention was made to solve the above-mentioned problems, and aims to provide a crimp terminal in which the tips of a pair of crimping pieces reliably bite into the core wire and a stable conductive resistance is obtained between the crimping terminal and the electric wire.

本発明は、基底部と前記基底部の両側端から延設された一対の加締め片部を有し、電線の複数の素線からなる芯線を圧着する芯線圧着部と、前記各加締め片部がそれぞれ内側に向かって湾曲状に加締められた状態で互いに対向する面にそれぞれ設けられたテーパ面とを備えたことを特徴とする圧着端子である。 The present invention is a crimp terminal characterized by having a base portion and a pair of crimping pieces extending from both ends of the base portion, a core wire crimping portion that crimps a core wire consisting of multiple strands of an electric wire, and tapered surfaces provided on the surfaces facing each other when each of the crimping pieces is crimped inwardly in a curved shape.

本発明によれば、芯線圧着部の加締め圧着過程で、一対の加締め片部の先端部にはテーパ面が設けられているため、芯線に容易に入り込む。そして、一対の加締め片部が芯線に入り込む過程で各テーパ面が芯線より互いに密着する方向の反力を受けるため、一対の加締め片部が直線方向に芯線に入り込む。以上より、各加締め片部の先端が確実に芯線内に入り込み、且つ、電線との間の導通抵抗が安定する。 According to the present invention, during the crimping process of the core wire crimping section, the tip ends of the pair of crimping pieces are provided with tapered surfaces, so that they easily enter the core wire. Then, in the process of the pair of crimping pieces entering the core wire, each tapered surface receives a reaction force from the core wire in a direction in which they come into close contact with each other, so the pair of crimping pieces enter the core wire in a linear direction. As described above, the tip ends of each crimping piece reliably enter the core wire, and the conductive resistance between them is stable.

本発明の一実施形態を示し、（ａ）は圧着端子に電線を圧着する前の斜視図、（ｂ）は（ａ）のＡ－Ａ線断面図である。1A is a perspective view of a crimp terminal before an electric wire is crimped to the crimp terminal according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line AA in FIG. 本発明の一実施形態を示し、（ａ）は電線を圧着した圧着端子の側面図、（ｂ）は（ａ）のＢ－Ｂ線断面図である。1A is a side view of a crimp terminal to which an electric wire is crimped, and FIG. 1B is a cross-sectional view taken along line BB of FIG. 1A, showing one embodiment of the present invention. 本発明の一実施形態を示し、（ａ）～（ｃ）はそれぞれ加締め過程を示す断面図である。1 shows one embodiment of the present invention, and FIG. 1(a) to (c) are cross-sectional views showing a crimping process. 本発明の一実施形態を示し、一対の加締め片部が芯線より受ける反力を説明する図である。10A to 10C are diagrams illustrating the embodiment of the present invention and explain a reaction force that a pair of crimping pieces receives from a core wire. 本発明の一実施形態の変形例を示し、（ａ）は芯線を圧着する前の芯線圧着部の断面図（図１（ｂ）に相当する図）、（ｂ）は一対の加締め片部が芯線より受ける反力を説明する図（図４に相当する図）である。1(a) is a cross-sectional view of a core wire crimping portion before the core wire is crimped (a view corresponding to FIG. 1(b)), and FIG. 1(b) is a view explaining a reaction force that a pair of crimping pieces receives from the core wire (a view corresponding to FIG. 4). 従来例を示し、（ａ）は圧着端子に電線を圧着する前の斜視図、（ｂ）は（ａ）のＣ－Ｃ線断面図である。1A is a perspective view of a conventional example before an electric wire is crimped to a crimp terminal, and FIG. 1B is a cross-sectional view taken along line CC of FIG. 従来例を示し、（ａ）は電線を圧着した圧着端子の側面図、（ｂ）は（ａ）のＤ－Ｄ線断面図である。1A is a side view of a crimp terminal to which an electric wire has been crimped, and FIG. 1B is a cross-sectional view taken along line DD of FIG. 従来例を示し、（ａ）～（ｃ）はそれぞれ加締め過程を示す断面図である。1 shows a conventional example, and (a) to (c) are cross-sectional views showing the crimping process. 従来例を示し、一対の加締め片部が芯線より受ける反力を説明する図である。13A and 13B are diagrams illustrating a conventional example, illustrating a reaction force that a pair of crimping pieces receives from a core wire.

以下、本発明の一実施形態を図面に基づいて説明する。 One embodiment of the present invention will be described below with reference to the drawings.

図１～図４は本発明の一実施形態を示す。図１及び図２に示すように、電線Ｗは、複数の素線１ａからなる芯線１と芯線１の外周を覆う絶縁外皮２とから構成されている。電線Ｗの先端側は、絶縁外皮２が除去されて芯線１が露出されている。芯線１は、アルミニウム製又はアルミニウム合金製（以下、アルミ製）の多数の素線１ａからなり、多数の素線１ａが互いに撚られている。つまり、電線Ｗは、アルミ電線である。 Figures 1 to 4 show one embodiment of the present invention. As shown in Figures 1 and 2, the electric wire W is composed of a core wire 1 consisting of multiple strands 1a and an insulating sheath 2 covering the outer circumference of the core wire 1. At the tip side of the electric wire W, the insulating sheath 2 is removed to expose the core wire 1. The core wire 1 is composed of multiple strands 1a made of aluminum or an aluminum alloy (hereinafter, "aluminum"), and the multiple strands 1a are twisted together. In other words, the electric wire W is an aluminum electric wire.

圧着端子１０は、例えば銅合金製であり、所定形状に裁断したプレートを折り曲げ加工することによって形成されている。圧着端子１０は、相手端子接続部１１と電線接続部１５を有する。電線接続部１５は、芯線圧着部１６と外皮圧着部１７を有する。芯線圧着部１６は、基底部１６ａとこの基底部１６ａの両側端から延設された一対の加締め片部１６ｂを有する。一対の加締め片部１６ｂは、図１等に示すように、電線Ｗを圧着する前の状態にあって、それぞれ先端に向かうに従って互いの間隔が徐々に離間する外斜めに延びるストレート形状である。 The crimp terminal 10 is made of, for example, a copper alloy, and is formed by bending a plate cut into a predetermined shape. The crimp terminal 10 has a mating terminal connection portion 11 and an electric wire connection portion 15. The electric wire connection portion 15 has a core wire crimping portion 16 and an outer cover crimping portion 17. The core wire crimping portion 16 has a base portion 16a and a pair of crimping pieces 16b extending from both ends of the base portion 16a. As shown in FIG. 1, etc., before the electric wire W is crimped, the pair of crimping pieces 16b have a straight shape that extends diagonally outward and the distance between them gradually increases toward the tip.

一対の加締め片部１６ｂの先端部１８には、テーパ面１８ａが設けられている。テーパ面１８ａは、図１（ｂ）等に示すように、芯線１の圧着前の状態にあって、それぞれの外面に配置されるが、一対の加締め片部１６ｂがそれぞれ内側に向かって湾曲状に加締められた状態（図２（ｂ）参照）にあって、互いに対向する内面にそれぞれ配置される。一対の加締め片部１６ｂの先端部１８は、テーパ面１８ａによって先端に向かって徐々に肉厚が薄くなっている。テーパ面１８ａは、先端部１８の先端に向かって傾斜するストレート面である。 The tip portions 18 of the pair of crimping pieces 16b are provided with tapered surfaces 18a. As shown in FIG. 1(b) and other figures, the tapered surfaces 18a are located on the outer surfaces of the respective crimping pieces 16b before the core wire 1 is crimped, but when the pair of crimping pieces 16b are each crimped inwardly and curved (see FIG. 2(b)), they are located on the inner surfaces facing each other. The tip portions 18 of the pair of crimping pieces 16b are gradually thinner toward the tip due to the tapered surfaces 18a. The tapered surfaces 18a are straight surfaces that slope toward the tip of the tip portions 18.

外皮圧着部１７は、基底部１７ａとこの基底部１７ａの両側から延設された一対の加締め片部１７ｂを有する。 The outer skin crimping portion 17 has a base portion 17a and a pair of crimping pieces 17b extending from both sides of the base portion 17a.

圧着端子１０は、芯線圧着部１６によって露出された芯線１を加締め圧着し、外皮圧着部１７によって絶縁外皮２を加締め圧着している。 The crimp terminal 10 crimps the exposed core wire 1 with the core wire crimping portion 16, and crimps the insulating outer sheath 2 with the outer sheath crimping portion 17.

圧着端子１０は、加締め治具２０によって圧着される。図３に示すように、加締め治具２０は、アンビル２１と、アンビル２１に対して昇降するクリンパ２２とを有する。アンビル２１の上面２１ａは、芯線圧着部１６の主に基底部１６ａの最終的な加締め外周形状に形成されている。クリンパ２２の下方側には、加締め溝２２ａが形成されている。加締め溝２２ａは、芯線圧着部１６の一対の加締め片部１６ｂの最終的な加締め外周形状を有する。 The crimp terminal 10 is crimped by a crimping tool 20. As shown in FIG. 3, the crimping tool 20 has an anvil 21 and a crimper 22 that moves up and down relative to the anvil 21. The upper surface 21a of the anvil 21 is formed into the final crimped outer circumferential shape of mainly the base portion 16a of the core wire crimping portion 16. A crimping groove 22a is formed on the lower side of the crimper 22. The crimping groove 22a has the final crimped outer circumferential shape of the pair of crimping pieces 16b of the core wire crimping portion 16.

次に、加締め治具２０を用いた芯線圧着部１６の圧着過程を説明する。図３（ａ）に示すように、アンビル２１の上面２１ａに芯線圧着部１６を載置する。次に、上方よりクリンパ２２を降下させる。すると、クリンパ２２が一対の加締め片部１６ｂを押圧し、先端に向かって外方に開く形状の一対の加締め片部１６ｂが互いの間隔を狭める方向に塑性変形される。クリンパ２２が更に降下されると、図３（ｂ）に示すように、アンビル２１及びクリンパ２２が基底部１６ａ及び一対の加締め片部１６ｂを押圧して芯線１の外周を包み込むように塑性変形すると共に一対の加締め片部１６ｂの先端部１８が芯線１に入り込む。一対の加締め片部１６ｂの先端部１８は、芯線１に対してほぼ垂直方向（芯線１のほぼ中心に向かう方向）を入り込む。 Next, the crimping process of the core wire crimping portion 16 using the crimping tool 20 will be described. As shown in FIG. 3(a), the core wire crimping portion 16 is placed on the upper surface 21a of the anvil 21. Next, the crimper 22 is lowered from above. The crimper 22 presses the pair of crimping pieces 16b, and the pair of crimping pieces 16b, which are shaped to open outward toward their tips, are plastically deformed in a direction narrowing the gap between them. When the crimper 22 is further lowered, as shown in FIG. 3(b), the anvil 21 and the crimper 22 press the base portion 16a and the pair of crimping pieces 16b, plastically deforming to wrap around the outer periphery of the core wire 1, and the tip portions 18 of the pair of crimping pieces 16b enter the core wire 1. The tip portions 18 of the pair of crimping pieces 16b enter the core wire 1 in a direction almost perpendicular to the core wire 1 (in a direction toward almost the center of the core wire 1).

ここで、一対の加締め片部１６ｂの先端部１８にはテーパ面１８ａに設けられているため、芯線１に容易に入り込む。そして、図４にて示すように、一対の加締め片部１６ｂが芯線１に入り込む過程で各テーパ面１８ａが芯線１より反力Ｒ１（図４の破線は、反力Ｒ１の分力を示す）を受けるが、この反力Ｒ１は一対の加締め片部１６ｂを互いに密着する方向に作用するため、一対の加締め片部１６ｂが一体となって直線方向に沿って芯線１に入り込む。そして、アンビル２１とクリンパ２２による最終加締め位置において、図３（ｃ）に示すように、一対の加締め片部１６ｂの先端部１８が芯線１内に直線方向に十分に食い込んだ状態で加締め圧着される。 Here, the tip 18 of the pair of crimping pieces 16b is provided with a tapered surface 18a, so that it easily enters the core wire 1. Then, as shown in FIG. 4, in the process of the pair of crimping pieces 16b entering the core wire 1, each tapered surface 18a receives a reaction force R1 from the core wire 1 (the broken line in FIG. 4 indicates a component force of the reaction force R1). This reaction force R1 acts in a direction that brings the pair of crimping pieces 16b into close contact with each other, so the pair of crimping pieces 16b enter the core wire 1 in a linear direction as a unit. Then, at the final crimping position by the anvil 21 and the crimper 22, as shown in FIG. 3(c), the tip 18 of the pair of crimping pieces 16b is crimped and crimped in a state where it is fully embedded in the core wire 1 in a linear direction.

以上説明したように、圧着端子１０は、基底部１６ａと基底部１６ａの両側端から延設された一対の加締め片部１６ｂを有し、電線Ｗの複数の素線１ａからなる芯線１を圧着する芯線圧着部１６と、一対の加締め片部１６ｂの先端部に設けられ、各加締め片部１６ｂがそれぞれ内側に向かって湾曲状に加締められた状態で互いに対向する面にそれぞれ設けられたテーパ面１８ａとを備えている。 As described above, the crimp terminal 10 has a base portion 16a and a pair of crimping pieces 16b extending from both ends of the base portion 16a, and is equipped with a core wire crimping portion 16 that crimps a core wire 1 consisting of multiple strands 1a of an electric wire W, and tapered surfaces 18a provided at the tip portions of the pair of crimping pieces 16b, each of which is provided on the surfaces facing each other with each crimping piece 16b being crimped inwardly in a curved shape.

従って、上記したように、芯線圧着部１６の加締め圧着過程で、一対の加締め片部１６ｂの先端部１８にはテーパ面１８ａが設けられているため、芯線１に容易に入り込む。そして、一対の加締め片部１６ｂが芯線１に入り込む過程で各テーパ面１８ａが芯線１より互いに密着する方向の反力Ｒ１を受けるため、一対の加締め片部１６ｂが直線方向に沿って芯線１に入り込む。これにより、一対の加締め片部１６ｂが芯線１を三分割せず、芯線１内に圧縮差が発生しない。以上より、各加締め片部１６ｂの先端部１８が確実に芯線１内に入り込み、且つ、電線Ｗとの間の導通抵抗が安定する。 Therefore, as described above, during the crimping process of the core wire crimping portion 16, the tip 18 of the pair of crimping pieces 16b has a tapered surface 18a, so that it easily enters the core wire 1. Then, in the process of the pair of crimping pieces 16b entering the core wire 1, each tapered surface 18a receives a reaction force R1 from the core wire 1 in a direction in which they come into close contact with each other, so the pair of crimping pieces 16b enter the core wire 1 in a linear direction. As a result, the pair of crimping pieces 16b do not divide the core wire 1 into three, and no compression difference occurs within the core wire 1. As a result, the tip 18 of each crimping piece 16b reliably enters the core wire 1, and the conductive resistance between the core wire W and the tapered surface 18a is stable.

図５には、テーパ面１８ａの変形例が示されている。前記実施形態では、テーパ面１８ａがストレート面であったが、この変形例ではテーパ面１８ａはアール面である。一対の加締め片部１６ｂの先端部１８は、テーパ面１８ａによって先端に向かって徐々に肉厚が薄くなっている。 Figure 5 shows a modified example of the tapered surface 18a. In the above embodiment, the tapered surface 18a was a straight surface, but in this modified example, the tapered surface 18a is a curved surface. The tip 18 of the pair of crimping pieces 16b is gradually thinner toward the tip due to the tapered surface 18a.

この変形例のテーパ面１８ａでも前記実施形態と同様な作用、効果がある。 The tapered surface 18a of this modified example has the same effect as the previous embodiment.

実施形態では、芯線１がアルミ製であるが、本発明はアルミ製以外の芯線１（例えば銅合金製）であっても適用できる。 In the embodiment, the core wire 1 is made of aluminum, but the present invention can also be applied to core wires 1 made of materials other than aluminum (e.g., copper alloys).

Ｗ電線
１芯線
１ａ素線
１０圧着端子
１６芯線圧着部
１６ａ基底部
１６ｂ加締め片部
１８先端部
１８ａテーパ面 W Electric wire 1 Core wire 1a Element wire 10 Crimp terminal 16 Core wire crimping portion 16a Base portion 16b Crimping piece portion 18 Tip portion 18a Tapered surface

Claims

A connection structure between a core wire consisting of a plurality of wires of an electric wire and a crimp terminal,
The crimp terminal is
a core wire crimping portion having a base portion and a pair of crimping pieces extending from both side ends of the base portion, the core wire being crimped;
a pair of tapered surfaces provided at tip portions of the pair of crimping pieces,
A connection structure between a core wire and a crimp terminal, characterized in that when a pair of the crimping pieces are each crimped inwardly in a curved shape, each of the tapered surfaces is formed on a surface of each of the crimping pieces that directly faces the wire, and the surfaces of each of the crimping pieces opposite the surface on which the tapered surface is formed are in close contact with each other.

2. The connection structure of claim 1 between a core wire and a crimp terminal ,
A connection structure between a core wire and a crimp terminal , wherein the tapered surface is a straight surface that is inclined toward the tip of the tip portion.

2. The connection structure of claim 1 between a core wire and a crimp terminal ,
A connection structure between a core wire and a crimp terminal , wherein the tapered surface is an R surface curved toward the tip of the tip portion.

A connection structure between a core wire and a crimp terminal according to any one of claims 1 to 3,
A connection structure between a core wire and a crimp terminal, characterized in that, when a pair of the crimping pieces are each crimped inward in a curved shape, the pair of the crimping pieces enter the core wire with the surfaces of each crimping piece opposite to the surface on which the tapered surface is formed being in close contact with each other.