JP2014160577A - Crimp terminal and wire harness using crimp terminal - Google Patents

Crimp terminal and wire harness using crimp terminal Download PDF

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JP2014160577A
JP2014160577A JP2013030615A JP2013030615A JP2014160577A JP 2014160577 A JP2014160577 A JP 2014160577A JP 2013030615 A JP2013030615 A JP 2013030615A JP 2013030615 A JP2013030615 A JP 2013030615A JP 2014160577 A JP2014160577 A JP 2014160577A
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crimping
wire
crimp
crimp terminal
core
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Hiroshi Orito
博 折戸
Yasushi Kihara
泰 木原
Yukihiro Kawamura
幸大 川村
Sho Sotoike
翔 外池
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Furukawa Electric Co Ltd:The
古河電気工業株式会社
Furukawa Automotive Systems Inc
古河As株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a crimp terminal capable of suppressing an increase in cost and preventing water adhesion to a contact part with a wire and a decrease in crimping force, and a wire harness which uses the crimp terminal.SOLUTION: A wire harness 1 includes a wire 10 and a crimp terminal 20. The wire 10 includes an insulation coating part 12 in which a core wire is coated by an insulator and an exposure core wire 11 which exposes a part of the core wire from a tip of the insulation coating part 12. The crimp terminal 20 includes a crimp part 22 into which the wire 10 can be inserted. The crimp part 22 opens on a rear end part 20B and includes a coated crimping part 24 crimped to the insulation coating part 12 and a core crimping part 23 crimped to the exposure core wire 11. Two salients 28 protruding from a reference inner surface 24a extending linearly in a longitudinal direction X to the inner side in a radial direction Y and separated in the longitudinal direction X via a separation part 27 are formed on an inner surface of the coated crimping part 24. A recess 29 which dents from the reference inner surface 24a to the outer side in the radial direction Y is formed in the separation part 27.

Description

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、自動車、OA機器、家電製品等の分野では、電力線や信号線として、電気導電性に優れた導電線が使用されるワイヤハーネスが知られる。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、熱可塑性合成樹脂製の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, in the fields of automobiles, OA equipment, home appliances, and the like, wire harnesses in which conductive wires having excellent electric conductivity are used as power lines and signal lines are known. 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 covered with an insulator made of thermoplastic synthetic resin, and an exposed portion of a conductor portion where the core wire is exposed from the tip of the covering portion, and a crimp terminal is crimped to each of the covering portion and the exposed portion. Thus, a conductive 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。また、高温環境下において、熱可塑性合成樹脂製の絶縁体は、弾性力が低下しやすく、弾性力の低下に伴って、圧着端子と電線との圧着力が低下する可能性がある。   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. In addition, in a high-temperature environment, an insulator made of a thermoplastic synthetic resin tends to have a low elastic force, and there is a possibility that the pressure-bonding force between the crimp terminal and the electric wire will decrease as the elastic force decreases.
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とともに、圧着力の低下を防止する。   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). Filling the resin material prevents moisture from adhering to the contact portion between the electric wire and the crimp terminal, and prevents a decrease in the crimp force.
特開2004−111058号公報JP 2004-111058 A
しかし、特許文献1の方法では、樹脂材を別途必要とするので、その分、ワイヤハーネス全体のコストが上がってしまうという問題が生じる。   However, since the method of Patent Document 1 requires a separate resin material, there arises a problem that the cost of the entire wire harness increases accordingly.
本発明は、このような問題に鑑みてなされたもので、コスト上昇を抑えることができ、かつ、電線との接触部分への水分の付着と圧着力の低下を予防可能な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 a crimp terminal capable of suppressing an increase in cost and preventing adhesion of moisture to a contact portion with an electric wire and a decrease in a crimp force and the crimping thereof. It aims at providing the wire harness using a terminal.
前述した目的を達するために第1の発明は、長手方向およびこれに直交する径方向を有し、導電性の芯線が絶縁体で被覆された電線の絶縁被覆部に圧着される被覆圧着部および前記絶縁被覆部の先端から露出した前記電線の露出芯線に圧着される芯線圧着部を有する圧着端子であって、前記芯線圧着部および前記被覆圧着部は、前記電線が挿入可能であって周方向において水密な断面中空形状を有し、前記芯線圧着部の前記被覆圧着部とは反対側に位置し、前記中空形状の内面が互いに水密に接着された封止部と、前記被覆圧着部の内面を構成する前記長手方向に直線上に延びる基準内面と、前記基準内面から径方向外側へとへこむ凹部とをさらに備えることを特徴とする圧着端子である。   In order to achieve the above-mentioned object, the first invention has a coated crimping part which has a longitudinal direction and a radial direction perpendicular to the longitudinal direction and is crimped to an insulating coating part of an electric wire in which a conductive core wire is coated with an insulator. A crimp terminal having a core wire crimping portion to be crimped to an exposed core wire of the electric wire exposed from the tip of the insulating coating portion, wherein the core wire crimping portion and the coating crimping portion can insert the electric wire in a circumferential direction. A sealing part having a water-tight cross-sectional hollow shape, located on the opposite side of the core crimping part from the coated crimping part, and wherein the hollow shaped inner surfaces are water-tightly bonded to each other, and an inner surface of the coated crimping part The crimp terminal further includes a reference inner surface that extends linearly in the longitudinal direction, and a recess that is recessed radially outward from the reference inner surface.
前記基準内面から径方向内側へと突出するとともに、前記凹部が位置する離間部を介して前記長手方向に離間する複数の凸部をさらに備えてもよい。   A plurality of convex portions protruding from the reference inner surface inward in the radial direction and spaced apart in the longitudinal direction via a spacing portion where the concave portion is located may be further provided.
前記凸部および前記凹部は、前記絶縁被覆部の周方向に環状に設けられてもよい。   The said convex part and the said recessed part may be provided cyclically | annularly in the circumferential direction of the said insulation coating part.
第1の発明の圧着端子は、前記凹部の内面から径方向内側へと突出する離間凸部をさらに備えてもよい。   The crimp terminal according to the first aspect of the present invention may further include a separating protrusion that protrudes radially inward from the inner surface of the recess.
前述した目的を達するために第2の発明は、導電性の芯線が絶縁体で被覆された絶縁被覆部および前記絶縁被覆部の先端から露出する露出芯線を有する電線と、長手方向を有し、前記絶縁被覆部に圧着される被覆圧着部および前記露出芯線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、前記芯線圧着部および前記被覆圧着部は、前記電線が挿入可能であって周方向において水密な断面中空形状を有し、前記圧着端子は、前記芯線圧着部および前記被覆圧着部は、前記電線が挿入可能であって周方向において水密な断面中空形状を有し、前記芯線圧着部の前記被覆圧着部とは反対側に位置し、前記中空形状の内面が互いに水密に接着された封止部と、前記被覆圧着部の内面を構成する前記長手方向に直線上に延びる基準内面と、前記基準内面から径方向外側へとへこむ凹部とをさらに備え、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ワイヤハーネスである。   In order to achieve the above-described object, the second invention has an insulation coating portion in which a conductive core wire is coated with an insulator, an electric wire having an exposed core wire exposed from the tip of the insulation coating portion, and a longitudinal direction, A wire harness including a coated crimping portion to be crimped to the insulating coating portion and a crimp terminal having a core wire crimping portion to be crimped to the exposed core wire, wherein the wire is inserted into the core wire crimping portion and the coated crimping portion. The crimp terminal has a hollow cross section that is watertight in the circumferential direction, and the crimp terminal has a hollow cross section that is watertight in the circumferential direction. The core crimping portion is located on the opposite side of the coated crimping portion, the sealing portion in which the hollow inner surfaces are adhered to each other in a watertight manner, and the longitudinal direction constituting the inner surface of the coated crimping portion. Extending up A wire harness characterized by further comprising a reference inner surface and a recess that dents radially outward from the reference inner surface, wherein the core wire is made of an aluminum-based material, and the core wire crimping portion is made of a copper-based material. is there.
本発明によれば、圧着端子の芯線圧着部が電線の露出芯線に圧着され、被覆圧着部が絶縁被覆部に圧着され、さらに、基準内面から径方向外側へとへこむ凹部を形成することによって、凹部において被覆圧着部の残留応力を拘束することができ、高温環境下においても圧着力の低下を防止することができる。   According to the present invention, the core wire crimp portion of the crimp terminal is crimped to the exposed core wire of the electric wire, the coating crimp portion is crimped to the insulating coating portion, and further, by forming a recess that dents radially outward from the reference inner surface, Residual stress of the coated crimping portion can be constrained in the concave portion, and a decrease in the crimping force can be prevented even in a high temperature environment.
また、被覆圧着部に離間部を介して複数の凸部を形成するから、長手方向の絶縁被覆部側からの水分の侵入を防止することができ、電線と圧着端子との接触部分に水分が付着するのを予防することができる。さらに、凸部と凹部を形成するだけで水分の侵入と圧着力の低下を防止できるので、別途樹脂材等を用いる必要がなく、その分のコスト上昇を抑えられる。   In addition, since a plurality of convex portions are formed on the coated crimping portion via the separation portions, moisture can be prevented from entering from the insulating coating portion side in the longitudinal direction, and moisture can be applied to the contact portion between the electric wire and the crimp terminal. Adhesion can be prevented. Furthermore, since the intrusion of moisture and the decrease in the pressure-bonding force can be prevented only by forming the convex portion and the concave portion, it is not necessary to use a separate resin material or the like, and an increase in cost can be suppressed.
また、凸部および凹部を絶縁被覆部の周方向に環状に設けることによって、その周方向全域において、水分の侵入と圧着力の低下を防止することができる。   In addition, by providing the convex portion and the concave portion in a ring shape in the circumferential direction of the insulating coating portion, it is possible to prevent moisture from entering and a decrease in the crimping force in the entire circumferential direction.
また、凹部に離間凸部を形成することによって、より効果的に水分の侵入と圧着力の低下を防止することができる。   In addition, by forming the separation convex portion in the concave portion, it is possible to more effectively prevent the intrusion of moisture and the decrease in the crimping force.
本発明によれば、コストの低減を図ることができ、かつ、電線との接触部分に対する水分の付着と圧着力の低下を防止することができる圧着端子および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 wire harness using the crimp terminal and crimp terminal which can aim at reduction of cost and can prevent the adhesion of the water | moisture content to the contact part with an electric wire and the fall of a crimping force is provided. be able to.
第1の実施形態のワイヤハーネスを示す分解斜視図。The disassembled perspective view which shows the wire harness of 1st Embodiment. ワイヤハーネスの斜視図。The perspective view of a wire harness. 図2のIII−III線断面図。III-III sectional view taken on the line of FIG. ワイヤハーネスの第1の製造方法を説明する説明図。Explanatory drawing explaining the 1st manufacturing method of a wire harness. ワイヤハーネスの第2の製造方法を説明する説明図。Explanatory drawing explaining the 2nd manufacturing method of a wire harness. 第2の実施形態のワイヤハーネスを示す断面図。Sectional drawing which shows the wire harness of 2nd Embodiment.
<第1の実施形態>
図1を参照すれば、ワイヤハーネス1は、長手方向Xおよびこれに直交する径方向Yを有し、電線10と圧着端子20とを含む。電線10は、導電性を有する芯線が絶縁体で被覆された絶縁被覆部12と、絶縁被覆部12の先端から芯線の一部が露出した露出芯線11を有する。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を撚って形成する。
<First Embodiment>
Referring to FIG. 1, the wire harness 1 has a longitudinal direction X and a radial direction Y orthogonal thereto, and includes an electric wire 10 and a crimp terminal 20. The electric wire 10 includes an insulating coating portion 12 in which a conductive core wire is covered with an insulator, and an exposed core wire 11 in which a part of the core wire is exposed from the tip of the insulating coating portion 12. 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 a plurality of aluminum alloy wires or the like.
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。   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、電線10が後端部20Bから挿入可能であって長手方向Xへ延びる断面中空形状(筒形状)を有するとともに後端部20Bに開口する被覆圧着部24と、被覆圧着部24とボックス部21との間に位置する芯線圧着部23とを含む。被覆圧着部24の内面は、長手方向Xに直線上に延びる基準内面24a(図4、図5参照)によって構成される。被覆圧着部24の内面には、基準内面24aから径方向Y内側へと突出するとともに、離間部27を介して長手方向Xに離間する2つの凸部28が形成される。凸部28は、周方向に連続する環状である。離間部27は、長手方向Xに所定の寸法を有する。2つの凸部28は、周方向に略平行である。圧着端子20の少なくとも圧着部22は銅系材料で構成される。   The crimping part 22 has a hollow cross-sectional shape (cylindrical shape) in which the electric wire 10 can be inserted from the rear end part 20B and extends in the longitudinal direction X, and opens to the rear end part 20B, and a covering crimping part 24 And a core crimping portion 23 positioned between the box portion 21 and the box portion 21. The inner surface of the cover crimping portion 24 is configured by a reference inner surface 24a (see FIGS. 4 and 5) that extends linearly in the longitudinal direction X. On the inner surface of the cover crimping portion 24, two convex portions 28 that protrude inward in the radial direction Y from the reference inner surface 24 a and are spaced apart in the longitudinal direction X via the spacing portion 27 are formed. The convex portion 28 has an annular shape that is continuous in the circumferential direction. The spacing portion 27 has a predetermined dimension in the longitudinal direction X. The two convex portions 28 are substantially parallel to the circumferential direction. At least the crimp portion 22 of the crimp terminal 20 is made of a copper-based material.
より詳細には、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。さらに、ボックス部21と圧着部22との間には、中空形状の内面を互いに水密に接触させた封止部26が設けられる。封止部26は、径方向Yへ延びるとともに、圧着部22の内面を互いに接触させ、水密に接着されることによって形成される。このような接着の方法として、例えばレーザ溶接を用いることができる。   More specifically, 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 a box portion 21 and a hollow cylindrical body of a hollow rectangular column. It is formed by bending into a three-dimensional terminal shape composed of the crimp portion 22. Furthermore, between the box part 21 and the crimping | compression-bonding part 22, the sealing part 26 which made the hollow inner surface contact mutually watertight is provided. The sealing part 26 is formed by extending in the radial direction Y, bringing the inner surfaces of the crimping part 22 into contact with each other, and being adhered in a watertight manner. As such a bonding method, for example, laser welding can be used.
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。この実施形態において、接合部25は図示の位置に形成されるが、これに限られるものではなく、芯線圧着部23および被覆圧着部24の周囲のいずれの位置に形成されてもよい。また、径方向Yは紙面の上下方向に図示されているが、これは一例に過ぎず、電線10の径方向であれば良い。   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. In this embodiment, the joint portion 25 is formed at the position shown in the figure, but is not limited to this, and may be formed at any position around the core wire crimping portion 23 and the covering crimping portion 24. Moreover, although the radial direction Y is illustrated in the vertical direction of the drawing, this is only an example, and any radial direction of the electric wire 10 may be used.
図2は、圧着端子20に電線10を挿入後、芯線圧着部23および被覆圧着部24を径方向内側へ加締めたものであり、図3は、図2のIII−III線断面図である。芯線圧着部23には電線10の露出芯線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、露出芯線11の長手方向Xにおける寸法よりも大きい。したがって、露出芯線11が封止部26に当接するように電線10を圧着部22に挿入すると、露出芯線11と絶縁被覆部12とが圧着部22の内周に対向して位置する。   FIG. 2 shows the crimping terminal 20 with the core wire crimping portion 23 and the covering crimping portion 24 crimped radially inward after inserting the electric wire 10, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. . The electric wire 10 is inserted so that the exposed core wire 11 of the electric wire 10 is located in the core 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 exposed core wire 11. Therefore, when the electric wire 10 is inserted into the crimping portion 22 so that the exposed core wire 11 contacts the sealing portion 26, the exposed core wire 11 and the insulating coating portion 12 are positioned to face the inner periphery of the crimping portion 22.
離間部27には、基準内面24aから径方向Y外側へとへこむ凹部29が形成される。被覆圧着部24内面間の径方向Yの寸法は、凸部28および凹部29が設けられた位置以外の位置よりも、凹部29が設けられた位置の方が大きい。すなわち、図3に示すように、寸法L1は、寸法L2、L3よりも大きい。ここで、寸法L1は、凹部29が設けられた位置における被覆圧着部24内面間の径方向Yの寸法である。また、寸法L2、L3は、凸部28および凹部29が設けられた位置以外の位置における被覆圧着部24内面間の径方向Yの寸法である。凹部29は、周方向に連続する環状である。凹部29は、離間部27の長手方向X全体に形成してもよいし、一部に形成してもよい。   The spacing portion 27 is formed with a recess 29 that is recessed from the reference inner surface 24a to the outside in the radial direction Y. The dimension in the radial direction Y between the inner surfaces of the coated crimping portion 24 is larger at the position where the concave portion 29 is provided than at the position other than the position where the convex portion 28 and the concave portion 29 are provided. That is, as shown in FIG. 3, the dimension L1 is larger than the dimensions L2 and L3. Here, the dimension L <b> 1 is a dimension in the radial direction Y between the inner surfaces of the coated crimping portion 24 at the position where the concave portion 29 is provided. The dimensions L2 and L3 are dimensions in the radial direction Y between the inner surfaces of the coated crimping parts 24 at positions other than the positions where the convex portions 28 and the concave portions 29 are provided. The concave portion 29 has an annular shape that is continuous in the circumferential direction. The concave portion 29 may be formed on the entire longitudinal direction X of the separating portion 27 or may be formed on a part thereof.
この実施形態において、図3に示すように、凸部28は、径方向Y内側に突出した部分の断面形状が半円形であるが、これに限られるものではなく、矩形、三角形、台形等であってもよい。凹部29は、径方向Y外側に突出した部分の断面形状が台形であるが、これに限られるものではなく、矩形、三角形、半円形等であっても良い。   In this embodiment, as shown in FIG. 3, the convex portion 28 has a semicircular cross-sectional shape at a portion protruding inward in the radial direction Y, but is not limited thereto, and is a rectangle, a triangle, a trapezoid, or the like. There may be. The concave portion 29 has a trapezoidal cross-sectional shape at a portion protruding outward in the radial direction Y, but is not limited thereto, and may be a rectangle, a triangle, a semicircle, or the like.
圧着部22に露出芯線11および絶縁被覆部12を挿入した状態で圧着部22を加締めることによって、芯線圧着部23は露出芯線11に圧着され、被覆圧着部24は絶縁被覆部12に圧着される。また、これら圧着と同時に封止部26を略平板状に押しつぶすように変形させることができる。このように押しつぶした状態で、レーザ溶接することによって、封止部26を水密にすることができる。   By crimping the crimping portion 22 with the exposed core wire 11 and the insulation coating portion 12 inserted into the crimping portion 22, the core wire crimping portion 23 is crimped to the exposed core wire 11, and the coating crimping portion 24 is crimped to the insulation coating portion 12. The Further, simultaneously with these pressure bonding, the sealing portion 26 can be deformed so as to be crushed into a substantially flat plate shape. The sealing portion 26 can be made watertight by laser welding in such a crushed state.
絶縁被覆部12において、芯線を覆う絶縁体として弾性を有する熱可塑性合成樹脂を用いることができる。このような材料を用いることによって、被覆圧着部24を圧着したときに後端部20Bを水密に保持することができる。圧着部22の後端部側を被覆圧着部24によって水密に封鎖し、前端部側を封止部26によって水密に封鎖したので、圧着部22への水分の侵入を防止することができる。   In the insulating coating part 12, a thermoplastic synthetic resin having elasticity can be used as an insulator covering the core wire. By using such a material, the rear end portion 20B can be kept watertight when the covering crimping portion 24 is crimped. Since the rear end side of the crimping part 22 is sealed in a watertight manner by the covering crimping part 24 and the front end part is sealed in a watertight manner by the sealing part 26, it is possible to prevent moisture from entering the crimping part 22.
上記のようなワイヤハーネス1において、電線10の芯線はアルミニウム系材料で構成され、圧着端子20の芯線圧着部23は銅系材料で構成されているから、芯線圧着部23では、異種金属が接触する。異種金属が接触した部分では、水分が付着することによって電食の可能性があるが、この実施形態では、被覆圧着部24に2つの凸部28を形成したので、絶縁被覆部12が略凸凹状に変形するため、水分の侵入経路を複雑化、かつ侵入経路の距離を長くすることができる。これにより、圧着部22への水分の侵入を防止することができ、電食を予防することができる。   In the wire harness 1 as described above, the core wire of the electric wire 10 is made of an aluminum-based material, and the core wire crimping portion 23 of the crimp terminal 20 is made of a copper-based material. To do. In the portion where the different metal contacts, there is a possibility of electrolytic corrosion due to moisture adhering. However, in this embodiment, since the two convex portions 28 are formed on the covering crimping portion 24, the insulating covering portion 12 is substantially uneven. Therefore, the moisture intrusion route can be complicated and the distance of the intrusion route can be increased. Thereby, the penetration | invasion of the water | moisture content to the crimping | compression-bonding part 22 can be prevented, and electrolytic corrosion can be prevented.
また、2つの凸部28を設けることによって、2つの凸部28の間に介在する離間部27では、仮に凹部29を設けなければ、絶縁被覆部12に発生した残留応力が部分的に高くなる。そして、残留応力が極端に高くなった場合には、凸部28を超えてその外側に応力が作用する可能性がある。しかし、この実施形態では、凹部29を設けることによって、これを予防することができる。   Further, by providing the two convex portions 28, the residual stress generated in the insulating coating portion 12 is partially increased unless the concave portion 29 is provided in the separation portion 27 interposed between the two convex portions 28. . And when a residual stress becomes extremely high, stress may act on the outer side beyond the convex part 28. FIG. However, in this embodiment, this can be prevented by providing the recess 29.
また、時間が経過するにつれて、絶縁被覆部12を押圧する力は、圧着部22で覆われない後端部20B側の絶縁被覆部12へと逃げるように移動しやすい。その結果、被覆圧着部24の圧着力が低下しかねない。特に、高温環境下において、熱可塑性合成樹脂製の絶縁被覆部12は、弾性力が低下しやすく、弾性力の低下に伴って、被覆圧着部24と絶縁被覆部12との圧着力が低下する可能性がある。しかし、この実施形態では、凸部28を設けることによって、後端部20B側への押圧力の逃げを防止する。さらに、仮に後端部20B側へ押圧力が逃げたとしても、凹部29にはある程度の残留応力が拘束されているので、この応力によって逃げた分の押圧力を補うことができる。したがって、後端部20B近傍における被覆圧着部24と絶縁被覆部12との圧着力の低下を防止することができる。   Moreover, as time passes, the force which presses the insulation coating part 12 tends to move so that it may escape to the insulation coating part 12 by the side of the rear-end part 20B which is not covered with the crimping | compression-bonding part 22. FIG. As a result, the crimping force of the coated crimping part 24 may be reduced. In particular, in a high-temperature environment, the insulating covering portion 12 made of thermoplastic synthetic resin tends to have a low elastic force, and the pressure-bonding force between the covering pressure-bonding portion 24 and the insulating covering portion 12 decreases as the elastic force decreases. there is a possibility. However, in this embodiment, by providing the convex portion 28, escape of the pressing force toward the rear end portion 20B is prevented. Furthermore, even if the pressing force escapes to the rear end portion 20B side, a certain amount of residual stress is constrained in the recess 29, so that the pressing force corresponding to the stress can be compensated. Accordingly, it is possible to prevent a decrease in the crimping force between the coating crimping part 24 and the insulating coating part 12 in the vicinity of the rear end part 20B.
ここで、ワイヤハーネス1の製造方法について説明する。ワイヤハーネス1の製造方法は、2通りの方法がある。第1の製造方法は、予め凸部28と凹部29が形成された圧着端子20に電線10を挿入し、圧着部22を加締める。第2の製造方法は、予め凹部29のみが形成された圧着端子20に電線10を挿入し、圧着部22を加締めるときに凸部28を形成する。   Here, the manufacturing method of the wire harness 1 is demonstrated. There are two methods for manufacturing the wire harness 1. In the first manufacturing method, the electric wire 10 is inserted into the crimp terminal 20 in which the convex portion 28 and the concave portion 29 are previously formed, and the crimp portion 22 is crimped. In the second manufacturing method, the protruding portion 28 is formed when the electric wire 10 is inserted into the crimping terminal 20 in which only the concave portion 29 is formed in advance and the crimping portion 22 is crimped.
図4は、ワイヤハーネス1の第1の製造方法を説明する説明図である。第1の製造方法では、圧着端子20は、銅合金条に2つの凸部28と凹部29を形成し、所望の形状に打ち抜いた後、これを筒状に接合することによって製造される。   FIG. 4 is an explanatory diagram for explaining a first manufacturing method of the wire harness 1. In the first manufacturing method, the crimp terminal 20 is manufactured by forming two convex portions 28 and a concave portion 29 in a copper alloy strip, punching them into a desired shape, and then joining them into a cylindrical shape.
2つの凸部28は、基準内面24aから径方向Y内側に向けて突出し、基準内面24aにおいて、筒状に接合したときの周方向に沿って途切れることなく連続するように、プレス成型により形成される。凸部28において、被覆圧着部24の外面における断面形状がへこんでいるが、これに限られるものではなく、平坦であってもよい。   The two convex portions 28 protrude from the reference inner surface 24a inward in the radial direction Y, and are formed by press molding so that the reference inner surface 24a is continuous without being interrupted along the circumferential direction when joined in a cylindrical shape. The In the convex part 28, although the cross-sectional shape in the outer surface of the coating crimping | compression-bonding part 24 is dented, it is not restricted to this, Flat may be sufficient.
凹部29は、基準内面24aから径方向Y外側へとへこみ、基準内面24aにおいて、筒状に接合したときの周方向に沿って途切れることなく連続するように、プレス成型により形成される。   The recess 29 is formed by press molding so as to be recessed from the reference inner surface 24a to the outside in the radial direction Y and to be continuous without interruption along the circumferential direction when the reference inner surface 24a is joined in a cylindrical shape.
基準内面24aに予め凸部28と凹部29が形成された圧着端子20に電線10を挿入し、図示しない圧着工具によって圧着部22を加締める。このような第1の製造方法では、予め凸部28および凹部29を被覆圧着部24に形成することによって、特殊な圧着工具を用いる必要がない。また、圧着工具での加締め後に、さらに部分的な加締め工程を経る必要がない。さらに、予め所望の位置に凸部28および凹部29を設けるので、後の工程で形成する場合に比べて位置ずれが起きにくい。   The electric wire 10 is inserted into the crimp terminal 20 in which the convex portion 28 and the concave portion 29 are formed in advance on the reference inner surface 24a, and the crimp portion 22 is crimped by a crimp tool (not shown). In such a 1st manufacturing method, it is not necessary to use a special crimping tool by forming the convex part 28 and the recessed part 29 in the coating | compression-bonding crimping part 24 previously. Moreover, it is not necessary to go through a partial caulking process after caulking with a crimping tool. Furthermore, since the convex portion 28 and the concave portion 29 are provided in a desired position in advance, the positional deviation is less likely to occur as compared with the case where it is formed in a later step.
図5は、ワイヤハーネス1の第2の製造方法を説明する説明図である。第2の製造方法では、圧着端子20は、銅合金条に凹部29のみを形成し、所望の形状に打ち抜いた後、これを筒状に接合することによって製造される。   FIG. 5 is an explanatory view illustrating a second manufacturing method of the wire harness 1. In the second manufacturing method, the crimp terminal 20 is manufactured by forming only the recess 29 in the copper alloy strip, punching it into a desired shape, and then joining it into a cylindrical shape.
圧着端子20の凹部29は、第1の製造方法と同様、図5に示すように、基準内面24aから径方向Y外側へとへこみ、基準内面24aにおいて、筒状に接合したときの周方向に沿って途切れることなく連続するように、プレス成型により形成されている。   As in the first manufacturing method, the recessed portion 29 of the crimp terminal 20 is recessed from the reference inner surface 24a to the outside in the radial direction Y as shown in FIG. 5, and the reference inner surface 24a has a circumferential direction when joined in a cylindrical shape. It is formed by press molding so as to be continuous without interruption.
第2の製造方法で用いる圧着工具40は、アンビルとなる第1圧着型41とクリンパとなる第2圧着型42で構成される。圧着工具40の内面形状は、圧着後における芯線圧着部23と被覆圧着部24の外面形状に応じた形状を有する。特に、被覆圧着部24に対応する圧着工具40の内面には、長手方向Xに所定の間隔を隔てて2つの金型凸部43を備える。この金型凸部43は、圧着工具40の内面から被覆圧着部24に向けて突出し、圧着工具40の内面において周方向に沿って途切れることなく連続する。   The crimping tool 40 used in the second manufacturing method includes a first crimping die 41 that becomes an anvil and a second crimping die 42 that becomes a crimper. The inner surface shape of the crimping tool 40 has a shape corresponding to the outer surface shape of the core wire crimping part 23 and the coated crimping part 24 after crimping. In particular, the inner surface of the crimping tool 40 corresponding to the covering crimping portion 24 is provided with two mold convex portions 43 at a predetermined interval in the longitudinal direction X. The mold convex portion 43 projects from the inner surface of the crimping tool 40 toward the covering crimping portion 24, and continues on the inner surface of the crimping tool 40 along the circumferential direction without interruption.
このような圧着工具40を用いて、電線10を挿入した圧着端子20の圧着部22を第1圧着型41と第2圧着型42で挟み込むようにして芯線圧着部23と被覆圧着部24を加締める。このような第2の製造方法によれば、凸部28を予め被覆圧着部24に設ける必要がない。   Using such a crimping tool 40, the core crimping portion 23 and the covering crimping portion 24 are added so that the crimping portion 22 of the crimping terminal 20 into which the electric wire 10 is inserted is sandwiched between the first crimping die 41 and the second crimping die 42. Tighten. According to such a second manufacturing method, it is not necessary to provide the convex portion 28 on the covering crimping portion 24 in advance.
第1の製造方法および第2の製造方法のいずれであっても、圧着により凸部28が絶縁被覆部12に食い込むため、万一、長手方向Xに引抜き力が加わっても、電線10が圧着端子20から容易に外れることを防止できる。また、離間部27では、凹部29の形状に沿って絶縁被覆部12が変形するため、部分的に高くなった残留応力を確実に拘束することができる。   In any of the first manufacturing method and the second manufacturing method, the protruding portion 28 bites into the insulating coating portion 12 by pressure bonding, so that even if a pulling force is applied in the longitudinal direction X, the electric wire 10 is crimped. It is possible to prevent the terminal 20 from being easily detached. Further, in the separation portion 27, the insulating coating portion 12 is deformed along the shape of the concave portion 29, so that it is possible to reliably restrain the partially increased residual stress.
上記のような第1の実施形態によれば、複数の凸部28を設けることによって、圧着部22内を確実に水密に保持することができる。また、離間部27に凹部29を設けることによって、絶縁被覆部12の残留応力を拘束することができ、圧着力の低下を防止することができる。また、圧着部22の水密保持と圧着力の低下防止のために、別途樹脂材等を用いる必要がないので、その分、ワイヤハーネス1のコストの低減を図ることができる。   According to the first embodiment as described above, by providing the plurality of convex portions 28, the inside of the crimping portion 22 can be reliably kept watertight. In addition, by providing the recessed portion 29 in the separation portion 27, the residual stress of the insulating coating portion 12 can be constrained, and a decrease in the crimping force can be prevented. Moreover, since it is not necessary to use a separate resin material or the like in order to maintain the watertightness of the crimping portion 22 and to prevent a decrease in the crimping force, the cost of the wire harness 1 can be reduced accordingly.
<第2の実施形態>
第2の実施形態において、第1の実施形態と同様の構成要件については、第1の実施形態と同じ符号を用い、その構成要件については詳細な説明を省略する。図6を参照すれば、凹部29には、その内面から径方向Y内側に突出した離間凸部30をさらに設けたことを特徴とする。
<Second Embodiment>
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof are omitted. Referring to FIG. 6, the concave portion 29 is further provided with a separation convex portion 30 protruding inward in the radial direction Y from the inner surface thereof.
離間凸部30は、周方向に連続する環状である。離間凸部30は、長手方向Xの位置が凹部29の略中心に形成される。この実施形態において、離間凸部30は、径方向Y内側に突出した部分の断面形状が半円形であるが、これに限られるものではなく、矩形、三角形、台形等であっても良い。   The separation convex part 30 is an annular shape that is continuous in the circumferential direction. The spacing convex portion 30 is formed at a substantially center of the concave portion 29 in the longitudinal direction X. In this embodiment, the spacing convex portion 30 has a semicircular cross-sectional shape at the portion protruding inward in the radial direction Y, but is not limited thereto, and may be a rectangle, a triangle, a trapezoid, or the like.
第2の実施形態におけるワイヤハーネス1の製造方法は、第1の実施形態と同様、2通りの方法がある。第1の製造方法は、予め凸部28と凹部29が形成された圧着端子20に電線10を挿入し、圧着部22を加締めるときに離間凸部30を形成する。第2の製造方法は、予め凹部29のみが形成された圧着端子20に電線10を挿入し、圧着部22を加締めるときに凸部28と離間凸部30を形成する。   As with the first embodiment, the method for manufacturing the wire harness 1 in the second embodiment includes two methods. In the first manufacturing method, when the electric wire 10 is inserted into the crimp terminal 20 in which the convex portion 28 and the concave portion 29 are previously formed, and the crimp portion 22 is crimped, the separation convex portion 30 is formed. In the second manufacturing method, when the electric wire 10 is inserted into the crimp terminal 20 in which only the concave portion 29 is formed in advance, and the crimp portion 22 is crimped, the convex portion 28 and the separation convex portion 30 are formed.
第2の実施形態では、第1の製造方法および第2の製造法のいずれであっても、圧着工具(不図示)は、離間凸部30に対応する内面形状が、離間凸部30の外面形状に応じた形状となっている。すなわち、第2の実施形態において用いる圧着工具は、凹部29の略中心に対応する長手方向Xの位置に金型凸部を備えている。この金型凸部は、図5に示す金型凸部43と同様、圧着工具の内面から被覆圧着部24に向けて突出し、圧着工具の内面において周方向に沿って途切れることなく連続して形成されている。   In the second embodiment, in either the first manufacturing method or the second manufacturing method, the crimping tool (not shown) has an inner surface shape corresponding to the separating protrusion 30 that is the outer surface of the separating protrusion 30. The shape depends on the shape. That is, the crimping tool used in the second embodiment includes a mold convex portion at a position in the longitudinal direction X corresponding to the approximate center of the concave portion 29. This mold convex part protrudes from the inner surface of the crimping tool toward the covering crimping part 24 and is continuously formed along the circumferential direction on the inner surface of the crimping tool in the same manner as the mold convex part 43 shown in FIG. Has been.
この第2の実施形態によれば、第1の実施形態と同様、複数の凸部28を設けることによって、圧着部22内を確実に水密に保持することができる。また、離間部27に凹部29を設けることによって、絶縁被覆部12の残留応力を拘束することができ、圧着力の低下を防止することができる。また、圧着部22の水密保持と圧着力の低下防止のために、別途樹脂材等を用いる必要がないので、その分、ワイヤハーネス1のコストの低減を図ることができる。   According to the second embodiment, as in the first embodiment, by providing the plurality of convex portions 28, the inside of the crimping portion 22 can be reliably kept watertight. In addition, by providing the recessed portion 29 in the separation portion 27, the residual stress of the insulating coating portion 12 can be constrained, and a decrease in the crimping force can be prevented. Moreover, since it is not necessary to use a separate resin material or the like in order to maintain the watertightness of the crimping portion 22 and to prevent a decrease in the crimping force, the cost of the wire harness 1 can be reduced accordingly.
さらに、凹部29に離間凸部30を形成することによって、絶縁被覆部12の残留応力が長手方向に移動しにくくなり、より効果的に被覆圧着部24の残留応力を拘束することができ、圧着力の低下を防止することができる。また、水分の侵入経路を複雑化、かつ侵入経路の距離を長くすることができる。   Further, by forming the separation convex portion 30 in the concave portion 29, the residual stress of the insulating coating portion 12 becomes difficult to move in the longitudinal direction, and the residual stress of the coating crimping portion 24 can be more effectively restrained. It is possible to prevent a decrease in force. Further, the intrusion route of moisture can be complicated and the distance of the intrusion route can be increased.
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…露出芯線
12…絶縁被覆部
20…圧着端子
21…ボックス部
22…圧着部
23…芯線圧着部
24…被覆圧着部
24a…基準内面
25…接合部
26…封止部
27…離間部
28…凸部
29…凹部
30…離間凸部
DESCRIPTION OF SYMBOLS 1 ... Wire harness 10 ... Electric wire 11 ... Exposed core wire 12 ... Insulation coating | cover part 20 ... Crimp terminal 21 ... Box part 22 ... Crimp part 23 ... Core wire crimp part 24 ... Cover crimp part 24a ... Standard inner surface 25 ... Joining part 26 ... Sealing Part 27 ... Separation part 28 ... Convex part 29 ... Concave part 30 ... Separation convex part

Claims (5)

  1. 長手方向を有し、導電性の芯線が絶縁体で被覆された電線の絶縁被覆部に圧着される被覆圧着部および前記絶縁被覆部の先端から露出した前記電線の露出芯線に圧着される芯線圧着部を有する圧着端子であって、
    前記芯線圧着部および前記被覆圧着部は、前記電線が挿入可能であって周方向において水密な断面中空形状を有し、
    前記芯線圧着部の前記被覆圧着部とは反対側に位置し、前記中空形状の内面が互いに水密に接着された封止部と、
    前記被覆圧着部の内面を構成する前記長手方向に直線上に延びる基準内面と、
    前記基準内面から径方向外側へとへこむ凹部とを備えることを特徴とする圧着端子。
    A coated crimping portion that has a longitudinal direction and is crimped to an insulation coating portion of an electric wire coated with an insulator, and a core crimping that is crimped to the exposed core wire exposed from the tip of the insulation coating portion A crimp terminal having a portion,
    The core wire crimping portion and the coated crimping portion have a hollow cross-sectional shape that allows the electric wire to be inserted and is watertight in the circumferential direction,
    A sealing part located on the opposite side of the core crimping part from the coated crimping part, the hollow inner surfaces being water-tightly bonded to each other;
    A reference inner surface extending linearly in the longitudinal direction constituting the inner surface of the coated crimp portion;
    A crimp terminal comprising a recess recessed from the reference inner surface to the radially outer side.
  2. 前記基準内面から径方向内側へと突出するとともに、前記凹部が位置する離間部を介して前記長手方向に離間する複数の凸部をさらに備えることを特徴とする請求項1に記載の圧着端子。   2. The crimp terminal according to claim 1, further comprising a plurality of convex portions protruding radially inward from the reference inner surface and spaced apart in the longitudinal direction via a spacing portion where the concave portion is located.
  3. 前記凸部および前記凹部は、前記絶縁被覆部の周方向に環状に設けられることを特徴とする請求項2に記載の圧着端子。   The crimp terminal according to claim 2, wherein the convex portion and the concave portion are provided annularly in a circumferential direction of the insulating coating portion.
  4. 前記凹部の内面から径方向内側へと突出する離間凸部をさらに備えることを特徴とする請求項1乃至3のいずれかに記載の圧着端子。   The crimp terminal according to any one of claims 1 to 3, further comprising a separation protrusion that protrudes radially inward from an inner surface of the recess.
  5. 導電性の芯線が絶縁体で被覆された絶縁被覆部および前記絶縁被覆部の先端から露出する露出芯線を有する電線と、
    長手方向を有し、前記絶縁被覆部に圧着される被覆圧着部および前記露出芯線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、
    前記芯線圧着部および前記被覆圧着部は、前記電線が挿入可能であって周方向において水密な断面中空形状を有し、
    前記圧着端子は、前記芯線圧着部および前記被覆圧着部は、前記電線が挿入可能であって周方向において水密な断面中空形状を有し、前記芯線圧着部の前記被覆圧着部とは反対側に位置し、前記中空形状の内面が互いに水密に接着された封止部と、前記被覆圧着部の内面を構成する前記長手方向に直線上に延びる基準内面と、前記基準内面から径方向外側へとへこむ凹部とをさらに備え、
    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ワイヤハーネス。
    An electric wire having an insulating coating portion in which a conductive core wire is coated with an insulator and an exposed core wire exposed from the tip of the insulating coating portion;
    A wire harness including a crimping terminal having a longitudinal direction and having a coated crimping part crimped to the insulating coating part and a core crimping part crimped to the exposed core wire,
    The core wire crimping portion and the coated crimping portion have a hollow cross-sectional shape that allows the electric wire to be inserted and is watertight in the circumferential direction,
    The crimp terminal has the core crimp part and the sheath crimp part that have a hollow cross-sectional shape in which the electric wire can be inserted and is watertight in the circumferential direction, and is opposite to the sheath crimp part of the core crimp part. And a sealing portion in which the hollow inner surfaces are adhered to each other in a water-tight manner, a reference inner surface that linearly extends in the longitudinal direction constituting the inner surface of the covering crimping portion, and radially outward from the reference inner surface A concave portion that is recessed,
    The core wire is made of an aluminum-based material, and the core wire crimping portion is made of a copper-based material.
JP2013030615A 2013-02-20 2013-02-20 Crimp terminal and wire harness using crimp terminal Pending JP2014160577A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020196706A1 (en) * 2019-03-28 2020-10-01 タツタ電線株式会社 Crimping terminal, electric wire provided with crimping terminal, and method for manufacturing crimping terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020196706A1 (en) * 2019-03-28 2020-10-01 タツタ電線株式会社 Crimping terminal, electric wire provided with crimping terminal, and method for manufacturing crimping terminal

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