JP2013165008A - Electric wire with ground terminal and ground structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of bimetallic corrosion due to moisture condensation of a metal member in a ground structure where a terminal of an electric wire with the terminal, which has an aluminum electric wire, is connected with the metal member.SOLUTION: In an electric wire 1 with a ground terminal, an electric wire 9 has a core wire 91 made of a metal material composed mainly of aluminum, and a terminal fitting 8 connected with the core wire 91 is made of a metal material composed mainly of aluminum. Further, an interval maintenance member 20 made of a non metal material is attached to the terminal fitting 8 overlapping therewith and has a hole 211 communicating with a hole 821 of the terminal fitting 8. A bolt member 6 penetrates through holes of the terminal fitting 8 and the interval maintenance member 20 and fixes the terminal fitting 8 to a reference potential body 7 with the interval maintenance member 20 sandwiched between the terminal fitting 8 and the reference potential body 7.

Description

本発明は、基準電位体に対してネジで固定される接地用端子付電線及びそれを用いた接地構造に関する。   The present invention relates to an electric wire with a terminal for grounding that is fixed to a reference potential body with a screw and a grounding structure using the same.

自動車などの車両においては、ワイヤハーネス及びその他の電装機器は、端子付電線を介して自動車のボディなどの金属部材に接続されることにより接地される。以下、そのような用途の端子付電線のことを接地用端子付電線と称する。自動車のボディなどの金属部材は接地用の基準電位体の一例である。   In a vehicle such as an automobile, a wire harness and other electrical equipment are grounded by being connected to a metal member such as an automobile body via a terminal-attached electric wire. Hereinafter, such a terminal-attached electric wire is referred to as a grounding terminal-attached electric wire. A metal member such as a body of an automobile is an example of a reference potential body for grounding.

車両における接地用の基準電位体は、鉄を主成分とする金属部材であることが多い。また、電線の端部に接続される端子は、通常、主として銅を主成分とする金属の部材で構成され、錫もしく錫合金のメッキが施されている場合が多い。   A reference potential body for grounding in a vehicle is often a metal member mainly composed of iron. The terminal connected to the end of the electric wire is usually composed of a metal member mainly composed of copper, and is often plated with tin or tin alloy.

特許文献１に示されるように、一般に、接地用端子付電線は、電線の端部に接続された端子の部分が金属の基準電位体に対して金属のボルトで固定されることにより、基準電体と電気的に接続される。なお、ボルトはネジの一例である。   As shown in Patent Document 1, in general, an electric wire with a terminal for grounding is configured such that a terminal portion connected to an end of the electric wire is fixed to a metal reference potential body with a metal bolt, whereby It is electrically connected to the body. The bolt is an example of a screw.

一方、昨今、車両に搭載される端子付電線において、車両の軽量化などの要請により、アルミニウム電線が採用されつつある。アルミニウム電線は、アルミニウムを主成分とする芯線を有する絶縁電線である。アルミニウム電線は、同等の導電性能を有する銅電線に比べ軽量である。   On the other hand, in recent years, aluminum electric wires are being adopted in electric wires with terminals mounted on vehicles due to demands for reducing the weight of the vehicles. An aluminum electric wire is an insulated wire having a core wire mainly composed of aluminum. Aluminum electric wires are lighter than copper electric wires having equivalent conductive performance.

特開２００７−１３４１３４号公報JP 2007-134134 A

接地用端子付電線においてアルミニウム電線が採用された場合、電線におけるアルミニウムの芯線と、銅又は鉄などからなる端子及び基準電位体とが、異種金属接触腐食（いわゆる電食）によって腐食しやすい。   When an aluminum electric wire is adopted in the electric wire with terminal for grounding, the aluminum core wire, the terminal made of copper or iron and the reference potential body are easily corroded by different metal contact corrosion (so-called electric corrosion).

特に、接地用端子付電線においては、基準電位体を構成する自動車のボディなどの金属部材が結露しやすく、結露水が電解液となることによって異種金属接触腐食がさらに生じやすい。   In particular, in an electric wire with a terminal for grounding, metal members such as the body of an automobile constituting the reference potential body are likely to condense, and contact with different metals is more likely to occur due to the condensed water becoming an electrolytic solution.

本発明は、アルミニウム電線を有する端子付電線の端子と金属部材とが接続される接地構造において、金属部材の結露による異種金属接触腐食の発生を防止することを目的とする。   An object of the present invention is to prevent the occurrence of different metal contact corrosion due to condensation of a metal member in a ground structure in which a terminal of a terminal-equipped electric wire having an aluminum wire and a metal member are connected.

本発明の第１態様に係る接地用端子付電線は、金属の基準電位体に対して接続される端子付電線であり、以下に示される各構成要素を備える。
（１）第１の構成要素は、アルミニウムを主成分とする金属材料からなる導体を有する電線である。
（２）第２の構成要素は、アルミニウムを主成分とする金属材料からなり、前記電線の前記導体に接続され、前記基準電位体への固定用のネジが通される孔が形成された端子金具である。
（３）第３の構成要素は、非金属材料からなり、前記端子金具に対して重ねて取り付けられ、前記端子金具の孔に連通する孔が形成された間隔維持部材である。 The electric wire with a terminal for grounding according to the first aspect of the present invention is an electric wire with a terminal connected to a metal reference potential body, and includes the following components.
(1) A 1st component is an electric wire which has the conductor which consists of a metal material which has aluminum as a main component.
(2) The second component is a terminal made of a metal material mainly composed of aluminum, connected to the conductor of the electric wire, and formed with a hole through which a fixing screw to the reference potential body is passed. It is a metal fitting.
(3) The third component is a distance maintaining member made of a non-metallic material, attached to the terminal fitting in an overlapping manner, and having a hole communicating with the hole of the terminal fitting.

本発明の第２態様に係る接地用端子付電線は、第１態様に係る接地用端子付電線の一態様である。第２態様に係る接地用端子付電線おいて、前記間隔維持部材には、前記端子金具もしくは前記電線の縁部に引っ掛かることにより当該間隔維持部材を前記端子金具に重なった状態で維持する係り部が形成されている。   The electric wire with a terminal for grounding according to the second aspect of the present invention is an aspect of the electric wire with a terminal for grounding according to the first aspect. In the electric wire with a terminal for grounding according to the second aspect, the gap maintaining member maintains the gap maintaining member in a state of being overlapped with the terminal metal fitting by being hooked on an edge of the terminal metal fitting or the electric wire. Is formed.

本発明の第３態様に係る接地用端子付電線は、第１態様又は第２態様に係る接地用端子付電線の一態様である。第３態様に係る接地用端子付電線おいて、前記間隔維持部材は、前記端子金具における前記ネジで固定される接点部から前記電線と接続された電線接続部までの全体に重なって形成されている。さらに、前記間隔維持部材には、前記端子金具における前記電線接続部に引っ掛かることにより前記端子金具に対する回転を止める回転止め部が形成されている。   The electric wire with a terminal for grounding according to the third aspect of the present invention is an aspect of the electric wire with a terminal for grounding according to the first aspect or the second aspect. In the electric wire with a terminal for grounding according to the third aspect, the gap maintaining member is formed so as to overlap the entire portion from the contact portion fixed by the screw in the terminal fitting to the electric wire connecting portion connected to the electric wire. Yes. Further, the interval maintaining member is formed with a rotation stop portion that stops rotation with respect to the terminal fitting by being hooked on the wire connecting portion of the terminal fitting.

また、本発明は、上記の各態様のいずれかに係る接地用端子付電線を金属の基準電位体に対してネジで固定する接地構造の発明として捉えられてもよい。本発明に係る接地構造において、前記ネジは、前記間隔維持部材が前記端子金具と前記基準電位体との間に挟み込まれる状態で、前記端子金具及び前記間隔維持部材各々の孔を貫通して前記端子金具を前記基準電位体に固定する。   Further, the present invention may be understood as an invention of a grounding structure in which the grounding terminal-attached electric wire according to any of the above aspects is fixed to a metal reference potential body with a screw. In the grounding structure according to the present invention, the screw passes through the holes of the terminal fitting and the gap maintaining member in a state where the gap maintaining member is sandwiched between the terminal fitting and the reference potential body. The terminal fitting is fixed to the reference potential body.

本発明によれば、アルミニウム電線の芯線と端子金具とが同種の金属で構成されているため、アルミニウム電線と端子金具との間では、異種金属接触腐食は生じない。   According to the present invention, since the core wire of the aluminum electric wire and the terminal fitting are made of the same kind of metal, no different metal contact corrosion occurs between the aluminum electric wire and the terminal fitting.

また、本発明において、非金属材料からなる間隔維持部材は、端子金具が金属の基準電位体に固定されたときに、端子金具と基準電位体との間隔を一定以上に維持する。そのため、基準電位体に生じた結露水が端子金具及び電線に接触することが回避される。その結果、基準電位体の結露による異種金属接触腐食の発生が防止される。   In the present invention, the interval maintaining member made of a non-metallic material maintains the interval between the terminal fitting and the reference potential body at a certain level or more when the terminal fitting is fixed to the metal reference potential body. Therefore, it is avoided that the dew condensation water which generate | occur | produced in the reference electric potential body contacts a terminal metal fitting and an electric wire. As a result, the occurrence of different metal contact corrosion due to condensation of the reference potential body is prevented.

また、第２態様によれば、間隔維持部材と端子金具とは、引っ掛かり構造により一体に維持される。そのため、間隔維持部材がテープ巻きなどによって端子金具に取り付けられる場合に比べ、端子金具への間隔維持部材の取り付けが容易となる。   Moreover, according to the 2nd aspect, a space | interval maintenance member and a terminal metal fitting are integrally maintained by the catch structure. Therefore, it becomes easier to attach the spacing maintaining member to the terminal fitting than when the spacing maintaining member is attached to the terminal fitting by tape winding or the like.

また、第３態様によれば、間隔維持部材が、端子金具の全体に重なって形成されているため、基準電位体に生じた結露水が端子金具及び電線に接触することがより確実に回避される。さらに、間隔維持部材の回転止め部が、端子金具に対する間隔維持部材の回転を防ぐ。そのため、間隔維持部材における、端子金具の電線接続部に重なる部分が、電線接続部の位置からずれることもない。   Further, according to the third aspect, since the gap maintaining member is formed so as to overlap the entire terminal fitting, it is more reliably avoided that the condensed water generated in the reference potential body contacts the terminal fitting and the electric wire. The Further, the rotation preventing portion of the interval maintaining member prevents the interval maintaining member from rotating with respect to the terminal fitting. Therefore, the part which overlaps the electric wire connection part of a terminal metal fitting in a space | interval maintenance member does not shift | deviate from the position of an electric wire connection part.

本発明の実施形態に係る接地構造２の各構成要素の側面図である。It is a side view of each component of the grounding structure 2 which concerns on embodiment of this invention. 接地構造２の各構成要素の平面図である。3 is a plan view of each component of the ground structure 2. FIG. 接地構造２の側面図である。3 is a side view of the ground structure 2. FIG. 本発明の実施形態に係る接地用端子付電線１の平面図及び側面図である。It is the top view and side view of the electric wire 1 with a terminal for grounding concerning the embodiment of the present invention.

以下、添付の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。以下の実施形態は、本発明を具体化した一例であり、本発明の技術的範囲を限定する事例ではない。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

図１から図４を参照しつつ、本発明の実施形態に係る接地用端子付電線１及びそれを備えた接地構造２について説明する。なお、図４（ａ）は、接地用端子付電線１の平面図であり、図４（ｂ）は、接地用端子付電線１の側面図である。   A grounding terminal-equipped electric wire 1 according to an embodiment of the present invention and a grounding structure 2 including the same will be described with reference to FIGS. 1 to 4. 4A is a plan view of the electric wire 1 with a grounding terminal, and FIG. 4B is a side view of the electric wire 1 with a grounding terminal.

接地用端子付電線１は、一端が自動車のボディなどの基準電位体７に接続され、他端が自動車におけるワイヤハーネス及びその他の電装機器と接続される端子付電線である。また、接地構造２は、接地用端子付電線１の一端を、自動車のボディなどの基準電位体７に対してボルト部材６により固定する構造である。   The grounded terminal-attached electric wire 1 is a terminal-attached electric wire having one end connected to a reference potential body 7 such as a body of an automobile and the other end connected to a wire harness and other electrical equipment in the automobile. The grounding structure 2 is a structure in which one end of the electric wire 1 with a grounding terminal is fixed to a reference potential body 7 such as an automobile body by a bolt member 6.

図１，２に示されるように、接地構造２は、基準電位体７、接地用端子付電線１、ボルト部材６及びワッシャ５により構成されている。また、接地用端子付電線１は、電線９、端子金具８及び間隔維持部材２０を備えている。   As shown in FIGS. 1 and 2, the ground structure 2 includes a reference potential body 7, a grounded terminal-attached electric wire 1, a bolt member 6, and a washer 5. The grounded terminal-attached electric wire 1 includes an electric wire 9, a terminal fitting 8, and a spacing maintaining member 20.

＜基準電位体＞
基準電位体７は、鉄又は鉄を主成分とする合金などの金属材料からなる部材である。自動車においては、基準電位体７は、例えば、車体フレームを構成する部材であることが考えられる。 <Reference potential body>
The reference potential body 7 is a member made of a metal material such as iron or an alloy containing iron as a main component. In an automobile, the reference potential body 7 may be a member constituting a body frame, for example.

図１，２に示される例では、基準電位体７には、ボルト部材６が締め込まれるボルト孔７１が形成されている。   In the example shown in FIGS. 1 and 2, a bolt hole 71 into which the bolt member 6 is tightened is formed in the reference potential body 7.

＜ボルト及びワッシャ＞
ボルト部材６は、接地用端子付電線１の端子金具８を基準電位体７に固定するネジである。本実施形態においては、ボルト部材６が、端子金具８に通されるとともに基準電位体７のボルト孔７１に締め込まれることにより、端子金具８が間隔維持部材２０を介して基準電位体７に固定される。 <Bolts and washers>
The bolt member 6 is a screw that fixes the terminal fitting 8 of the grounded terminal-attached electric wire 1 to the reference potential body 7. In the present embodiment, the bolt member 6 is passed through the terminal fitting 8 and tightened into the bolt hole 71 of the reference potential body 7, so that the terminal fitting 8 is connected to the reference potential body 7 via the interval maintaining member 20. Fixed.

また、ワッシャ５は、ボルト部材６の軸部が通される孔５１が形成された環状の金属部材である。ワッシャ５は、ボルト部材６のゆるみ防止のために用いられる。   The washer 5 is an annular metal member in which a hole 51 through which the shaft portion of the bolt member 6 is passed is formed. The washer 5 is used for preventing the bolt member 6 from loosening.

ボルト部材６及びワッシャ５は、鉄又はステンレスなどの金属の部材である。また、ボルト部材６及びワッシャ５の表面にメッキが形成されていることも考えられる。メッキとしては、銅もしくは黄銅などの銅合金の部材、又はそれらの部材に錫（Ｓｎ）メッキもしくは錫に銀（Ａｇ）、銅（Ｃｕ）、ビスマス（Ｂｉ）などが添加された錫合金のメッキが考えられる。また、ボルト部材６及びワッシャ５にアルミニウムのメッキが形成されていれば、防食効果がより高まる点において好適である。   The bolt member 6 and the washer 5 are metal members such as iron or stainless steel. It is also conceivable that plating is formed on the surfaces of the bolt member 6 and the washer 5. As plating, a copper alloy member such as copper or brass, or a tin alloy plate in which tin (Sn) plating or tin (Ag), copper (Cu), bismuth (Bi) or the like is added to those members. Can be considered. Further, if the bolt member 6 and the washer 5 are plated with aluminum, it is preferable in that the anticorrosion effect is further enhanced.

なお、ボルト部材６に代えて、ネジ山が形成された棒状部材が基準電位体７に対して起立した状態で固定されたスタッドボルトであることも考えられる。この場合、スタッドボルトが端子金具８に通されるとともに、不図示のナット部材がスタッドボルトに装着されることにより、端子金具８が間隔維持部材２０を介して基準電位体７に固定される。   Instead of the bolt member 6, it is also conceivable that the rod-shaped member on which the screw thread is formed is a stud bolt fixed in a state where it stands up with respect to the reference potential body 7. In this case, the stud bolt is passed through the terminal fitting 8 and a nut member (not shown) is attached to the stud bolt, whereby the terminal fitting 8 is fixed to the reference potential body 7 via the interval maintaining member 20.

＜電線＞
電線９は、長尺な導体である芯線９１と、その芯線９１の周囲を覆う絶縁体である絶縁被覆９２とを有する。通常、芯線９１は、細い導体からなる複数の素線が撚り合わされた撚り線であるが、芯線が単線であることも考えられる。端子金具８が取り付けられる電線９の端部は、予め一定の長さの分の芯線９１の周囲から絶縁被覆９２が剥がれた状態、即ち、一定の長さ分の芯線９１が絶縁被覆９２から伸び出た状態に加工されている。 <Wire>
The electric wire 9 includes a core wire 91 that is a long conductor and an insulating coating 92 that is an insulator that covers the periphery of the core wire 91. Usually, the core wire 91 is a stranded wire in which a plurality of strands made of thin conductors are twisted together, but the core wire may be a single wire. The end portion of the electric wire 9 to which the terminal fitting 8 is attached is in a state where the insulation coating 92 has been peeled off from the periphery of the core wire 91 of a certain length in advance, that is, the core wire 91 of a certain length extends from the insulation coating 92. It is processed to the state that it came out.

本実施形態においては、芯線９１は、アルミニウムを主成分とする金属の線材である。一方、絶縁被覆９２は、例えば、ポリ塩化ビニル、ポリエチレン、フッ素樹脂又はポリエステルなどの樹脂材料により構成されている。   In the present embodiment, the core wire 91 is a metal wire material whose main component is aluminum. On the other hand, the insulating coating 92 is made of, for example, a resin material such as polyvinyl chloride, polyethylene, fluorine resin, or polyester.

＜端子金具＞
端子金具８は、アルミニウムを主成分とする金属材料からなり、電線９の芯線９１に接続されている。この端子金具８は、ボルト部材６で固定される部分である接点部８２と、電線９の端部と接続された部分である電線接続部８１とを有する。接点部８２は、基準電位体７への固定用のボルト部材６が通される孔８２１が形成された平板状の部分である。 <Terminal fitting>
The terminal fitting 8 is made of a metal material mainly composed of aluminum, and is connected to the core wire 91 of the electric wire 9. The terminal fitting 8 includes a contact portion 82 which is a portion fixed by the bolt member 6 and a wire connecting portion 81 which is a portion connected to the end portion of the electric wire 9. The contact portion 82 is a flat plate-like portion in which a hole 821 through which the bolt member 6 for fixing to the reference potential body 7 is passed is formed.

図１，２に示される電線接続部８１は、電線９の端部に圧着される圧着部であり、絶縁被覆９２の部分に圧着された被覆バレル部と、芯線９１の部分に圧着された芯線バレル部とを有している。しかしながら、電線接続部８１が、電線９の芯線９１が溶接された部分であること、又は芯線バレル部のみを有する部分であることも考えられる。   1 and 2 is a crimping portion that is crimped to the end portion of the electric wire 9, and is a crimped barrel portion that is crimped to the insulating coating 92 portion and a core wire that is crimped to the core wire 91 portion. And a barrel portion. However, it is also conceivable that the electric wire connecting portion 81 is a portion where the core wire 91 of the electric wire 9 is welded or a portion having only the core wire barrel portion.

＜間隔維持部材＞
間隔維持部材２０は、合成樹脂などの非金属材料からなる部材である。間隔維持部材２０は、基部２１、係合爪部２２及び回転止め部２３を有する。 <Distance maintenance member>
The interval maintaining member 20 is a member made of a nonmetallic material such as a synthetic resin. The interval maintaining member 20 includes a base portion 21, an engaging claw portion 22, and a rotation stop portion 23.

基部２１は、少なくとも端子金具８の接点部８２の下面全体に重なる平板状の部分である。本実施形態における基部２１は、端子金具８における接点部８２から電線接続部８１までの下面全体に重なって形成されている。   The base portion 21 is a flat plate-like portion that overlaps at least the entire lower surface of the contact portion 82 of the terminal fitting 8. The base portion 21 in the present embodiment is formed so as to overlap the entire lower surface from the contact portion 82 to the wire connection portion 81 in the terminal fitting 8.

また、基部２１には、端子金具８に重なる状態で端子金具８の孔８２１に連通し、ボルト部材６が通される孔２１１が形成されている。   The base 21 is formed with a hole 211 that communicates with the hole 821 of the terminal fitting 8 so as to overlap the terminal fitting 8 and through which the bolt member 6 is passed.

また、係合爪部２２は、基部２１から起立して形成され、端子金具８における接点部８２の縁部に引っ掛かることにより間隔維持部材２０を端子金具８に重なった状態で維持する部分である。なお、係合爪部２２は、係り部の一例である。   Further, the engaging claw portion 22 is formed upright from the base portion 21 and is a portion that maintains the distance maintaining member 20 in a state of being overlapped with the terminal fitting 8 by being hooked on the edge portion of the contact portion 82 in the terminal fitting 8. . In addition, the engaging claw part 22 is an example of an engaging part.

基部２１が端子金具８に重ねられることにより、係合爪部２２は、弾性変形しつつその先端において張り出した部分が端子金具８の接点部８２の外縁から反対側の面に回り込み、接点部８２の反対側の外縁部に引っ掛かる。   When the base portion 21 is overlapped with the terminal fitting 8, the engaging claw portion 22 is elastically deformed, and the portion protruding at the tip of the engaging claw portion 22 wraps around from the outer edge of the contact portion 82 of the terminal fitting 8 to the opposite side surface. Hook on the outer edge of the other side.

回転止め部２３は、基部２１における端子金具８の電線接続部８１に重なる部分に起立して形成され、端子金具８の電線接続部８１に引っ掛かることにより、端子金具８に対する間隔維持部材２０の回転を止める部分である。   The rotation stopper 23 is formed standing on a portion of the base 21 that overlaps the wire connection portion 81 of the terminal fitting 8, and is hooked on the wire connection portion 81 of the terminal fitting 8, thereby rotating the spacing maintaining member 20 with respect to the terminal fitting 8. It is a part to stop.

＜接地用端子付電線＞
図４に示されるように、接地用端子付電線１は、電線９と、電線９の端部に接続された端子金具８と、その端子金具８に重ねて取り付けられた間隔維持部材２０とにより構成されている。間隔維持部材２０が予め端子金具８に取り付けられていれば、端子金具８を基準電位体７に固定する際に取り扱うべき部品の数が少なくなり、固定作業が容易となる。 <Electric wire with grounding terminal>
As shown in FIG. 4, the grounded terminal-attached electric wire 1 includes an electric wire 9, a terminal fitting 8 connected to an end of the electric wire 9, and a spacing maintaining member 20 attached to the terminal fitting 8 in an overlapping manner. It is configured. If the interval maintaining member 20 is attached to the terminal fitting 8 in advance, the number of parts to be handled when the terminal fitting 8 is fixed to the reference potential body 7 is reduced, and the fixing work is facilitated.

＜固定構造＞
図１及び図３に示されるように、ボルト部材６は、間隔維持部材２０が端子金具８と基準電位体７との間に挟み込まれる状態で、端子金具８の孔８２１及び間隔維持部材２０の孔２１１各々に通され、基準電位体７のボルト孔７１に締め込まれる。即ち、ボルト部材６は、間隔維持部材２０が端子金具８と基準電位体７との間に挟み込まれる状態で、端子金具８及び間隔維持部材２０各々の孔を貫通して端子金具８を基準電位体７に固定する。 <Fixed structure>
As shown in FIG. 1 and FIG. 3, the bolt member 6 is configured such that the gap maintaining member 20 is sandwiched between the terminal fitting 8 and the reference potential body 7, and the hole 821 of the terminal fitting 8 and the gap maintaining member 20. It passes through each of the holes 211 and is tightened into the bolt hole 71 of the reference potential body 7. That is, the bolt member 6 passes through the holes of the terminal fitting 8 and the spacing maintaining member 20 in a state where the spacing maintaining member 20 is sandwiched between the terminal fitting 8 and the reference potential body 7, so that the terminal fitting 8 is connected to the reference potential. Secure to body 7.

＜効果＞
接地構造２においては、電線９の芯線９１と端子金具８とが同種の金属で構成されているため、芯線９１と端子金具８との間では、異種金属接触腐食は生じない。 <Effect>
In the grounding structure 2, the core wire 91 of the electric wire 9 and the terminal fitting 8 are made of the same type of metal, so that no different metal contact corrosion occurs between the core wire 91 and the terminal fitting 8.

また、接地構造２において、非金属材料からなる間隔維持部材２０は、端子金具８が金属の基準電位体７に固定されたときに、端子金具８と基準電位体７との間隔を一定以上に維持する。そのため、基準電位体７に生じた結露水が端子金具８及び電線９に接触することが回避される。その結果、基準電位体７の結露による異種金属接触腐食の発生が防止される。   Further, in the grounding structure 2, the interval maintaining member 20 made of a nonmetallic material allows the interval between the terminal fitting 8 and the reference potential body 7 to be a certain level or more when the terminal fitting 8 is fixed to the metal reference potential body 7. maintain. Therefore, it is avoided that the dew condensation water generated in the reference potential body 7 contacts the terminal fitting 8 and the electric wire 9. As a result, the occurrence of different metal contact corrosion due to condensation of the reference potential body 7 is prevented.

また、接地用端子付電線１においては、間隔維持部材２０と端子金具８とは、係合爪部２２の引っ掛かり構造により一体に維持される。そのため、間隔維持部材２０がテープ巻きなどによって端子金具８に取り付けられる場合に比べ、端子金具８への間隔維持部材２０の取り付けが容易となる。   In the grounded terminal-attached electric wire 1, the gap maintaining member 20 and the terminal fitting 8 are integrally maintained by the catching structure of the engaging claw portion 22. For this reason, it is easier to attach the spacing maintaining member 20 to the terminal fitting 8 than when the spacing maintaining member 20 is attached to the terminal fitting 8 by tape winding or the like.

また、接地用端子付電線１においては、間隔維持部材２０が、端子金具８の全体に重なって形成されているため、基準電位体７に生じた結露水が端子金具８及び電線９に接触することがより確実に回避される。さらに、間隔維持部材２０の回転止め部２３が、端子金具８に対する間隔維持部材２０の回転を防ぐ。そのため、間隔維持部材２０における、端子金具８の電線接続部８１に重なる部分が、電線接続部８１の位置からずれることもない。   Further, in the grounded terminal-attached electric wire 1, the interval maintaining member 20 is formed so as to overlap the entire terminal fitting 8, so that condensed water generated in the reference potential body 7 contacts the terminal fitting 8 and the electric wire 9. Is more reliably avoided. Further, the rotation preventing portion 23 of the interval maintaining member 20 prevents the interval maintaining member 20 from rotating relative to the terminal fitting 8. Therefore, the portion of the distance maintaining member 20 that overlaps the wire connection portion 81 of the terminal fitting 8 does not deviate from the position of the wire connection portion 81.

＜その他＞
接地用端子付電線１において、間隔維持部材２０が、端子金具８における接点部８２の下面にのみ重なる形状で形成されることも考えられる。その場合でも、端子金具８の剛性により、基準電位体７と端子金具８の電線接続部８１との隙間は維持される。 <Others>
In the grounded terminal-attached electric wire 1, it is also conceivable that the spacing maintaining member 20 is formed in a shape that overlaps only with the lower surface of the contact portion 82 in the terminal fitting 8. Even in that case, the clearance between the reference potential body 7 and the wire connection portion 81 of the terminal fitting 8 is maintained by the rigidity of the terminal fitting 8.

また、間隔維持部材２０の係合爪部２２が、基部２１における電線接続部８１と重なる部分に形成され、電線９の縁部に引っ掛かる構造を有することも考えられる。そのような係合爪部２２が電線９の縁部に引っ掛かることによっても、間隔維持部材２０は端子金具８に重なった状態で維持される。   It is also conceivable that the engaging claw portion 22 of the gap maintaining member 20 is formed in a portion that overlaps the wire connecting portion 81 in the base portion 21 and is hooked on the edge portion of the electric wire 9. Even when such an engaging claw portion 22 is hooked on the edge of the electric wire 9, the spacing maintaining member 20 is maintained in a state of being overlapped with the terminal fitting 8.

また、ボルト部材６のヘッド部における端子金具８に対向する側の面に滑り止め用の凹凸が形成されること等により、ワッシャ５が省略されることも考えられる。   It is also conceivable that the washer 5 may be omitted, for example, by forming a non-slip unevenness on the surface of the bolt member 6 on the side facing the terminal fitting 8.

１ 接地用端子付電線
２ 接地構造
５ ワッシャ
６ ボルト部材
７ 基準電位体
８ 端子金具
９ 電線
１０ 端子金具
２０ 間隔維持部材
２１ 基部
２２ 係合爪部
２３ 回転止め部
５１ ワッシャの孔
７１ ボルト孔
８１ 電線接続部
８２ 接点部
９１ 芯線
９２ 絶縁被覆
２１１ 間隔維持部材の孔
８２１ 端子金具の孔 DESCRIPTION OF SYMBOLS 1 Electric wire with terminal for grounding 2 Grounding structure 5 Washer 6 Bolt member 7 Reference potential body 8 Terminal metal fitting 9 Electric wire 10 Terminal metal fitting 20 Spacing maintenance member 21 Base 22 Engagement claw part 23 Anti-rotation part 51 Washer hole 71 Bolt hole 81 Electric wire Connection portion 82 Contact portion 91 Core wire 92 Insulation coating 211 Hole 821 in the gap maintaining member Hole in the terminal fitting

Claims (4)

金属の基準電位体に対して接続される接地用端子付電線であって、
アルミニウムを主成分とする金属材料からなる導体を有する電線と、
アルミニウムを主成分とする金属材料からなり、前記電線の前記導体に接続され、前記基準電位体への固定用のネジが通される孔が形成された端子金具と、
非金属材料からなり、前記端子金具に対して重ねて取り付けられ、前記端子金具の孔に連通する孔が形成された間隔維持部材と、を備えた接地用端子付電線。 An electric wire with a grounding terminal connected to a metal reference potential body,
An electric wire having a conductor made of a metal material mainly composed of aluminum;
Terminal metal fittings made of a metal material mainly composed of aluminum, connected to the conductor of the electric wire, and formed with a hole through which a fixing screw to the reference potential body is passed,
An electric wire with a terminal for grounding, comprising: a spacing maintaining member made of a non-metallic material and attached to the terminal metal fitting so as to overlap with the hole of the terminal metal fitting. 前記間隔維持部材には、前記端子金具もしくは前記電線の縁部に引っ掛かることにより当該間隔維持部材を前記端子金具に重なった状態で維持する係り部が形成されている、請求項１に記載の接地用端子付電線。   2. The grounding according to claim 1, wherein the gap maintaining member is formed with an engaging portion that holds the gap maintaining member in a state of being overlapped with the terminal fitting by being hooked on an edge of the terminal fitting or the electric wire. Electric wire with terminal. 前記間隔維持部材は、前記端子金具における前記ネジで固定される接点部から前記電線と接続された電線接続部までの全体に重なって形成され、
前記間隔維持部材には、前記端子金具における前記電線接続部に引っ掛かることにより前記端子金具に対する回転を止める回転止め部が形成されている、請求項１又は請求項２に記載の接地用端子付電線。 The spacing maintaining member is formed so as to overlap the entire connection from the contact portion fixed with the screw in the terminal fitting to the wire connecting portion connected to the wire.
The grounding terminal-equipped electric wire according to claim 1 or 2, wherein the spacing maintaining member is formed with a rotation stopper portion that stops rotation with respect to the terminal fitting by being hooked on the electric wire connecting portion of the terminal fitting. . 接地用端子付電線を金属の基準電位体に対してネジで固定する接地構造であって、
前記接地用端子付電線は、
アルミニウムを主成分とする金属材料からなる導体を有する電線と、
アルミニウムを主成分とする金属材料からなり、前記電線の前記導体に接続され、前記ネジが通される孔が形成された端子金具と、
非金属材料からなり、前記端子金具に対して重ねて取り付けられ、前記端子金具の孔に連通する孔が形成された間隔維持部材と、を備え、
前記ネジは、前記間隔維持部材が前記端子金具と前記基準電位体との間に挟み込まれる状態で、前記端子金具及び前記間隔維持部材各々の孔を貫通して前記端子金具を前記基準電位体に固定する、接地構造。 A grounding structure for fixing an electric wire with a grounding terminal to a metal reference potential body with a screw,
The electric wire with terminal for grounding is
An electric wire having a conductor made of a metal material mainly composed of aluminum;
A metal terminal made of a metal material mainly composed of aluminum, connected to the conductor of the electric wire, and formed with a hole through which the screw is passed,
An interval maintaining member made of a non-metallic material, attached to the terminal fitting in an overlapping manner, and formed with a hole communicating with the hole of the terminal fitting,
The screws pass through the holes of the terminal fitting and the interval maintaining member in a state where the interval maintaining member is sandwiched between the terminal fitting and the reference potential body, and the terminal fitting is used as the reference potential body. Fixed, grounding structure.

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