JP4392144B2

JP4392144B2 - Waterproof structure for earth

Info

Publication number: JP4392144B2
Application number: JP2001259540A
Authority: JP
Inventors: 利一櫻井; 均奥村; 修谷内; 愼二加門
Original assignee: Honda Motor Co Ltd; Sumitomo Wiring Systems Ltd
Current assignee: Honda Motor Co Ltd; Sumitomo Wiring Systems Ltd
Priority date: 2001-08-29
Filing date: 2001-08-29
Publication date: 2009-12-24
Anticipated expiration: 2021-08-29
Also published as: JP2003068389A

Description

【０００１】
【発明の属する技術分野】
本発明は、アース用防水構造に関する。
【０００２】
【従来の技術】
自動車のエンジンルーム等においては、電装品にコネクタを介して接続された電線のもう一方の端末にアース用端子金具を接続して、それをボディ等の接地部に固着することでアースを取るようにしている。アース用端子金具は、一般に、ボルト等によって接地部に固着される取付部と、電線の端末部が接続されるバレル部とを備えており、バレル部では電線の被覆部分とそこから剥き出された芯線部分とがかしめ付けられている。
【０００３】
このような構成においては、電線に接続されるコネクタは防水構造を取るために内部が気密状態となっており、温度変化等によって内部が負圧になることがある。そのために、電線の端末部に水が付着した場合に、水が各芯線の隙間を通って電線の内側へ吸い込まれてしまうおそれがある。
【０００４】
従来、この対策として熱収縮チューブを用いたものが、例えば実開平４−２３０６１号公報等に記載されている。このものは、電線の端末部をかしめたバレル部に熱収縮性を有するチューブを被せ、加熱することでチューブを端末部に密着させて覆うようにしている。また、他の方法として、バレル部全体に半田付けを施して芯線部分を覆う方法もあり、２つの方法が併用されることもある。
【０００５】
【発明が解決しようとする課題】
しかしながら、熱収縮チューブは端子金具に対して密着性が十分でなく、また、半田も各芯線の隙間に浸透し難いことから、いずれの方法とも電線の端末部を完全に塞ぐことは難しく、防水機能の信頼性が十分ではなかった。また、両方法ともコストがかかるという問題もあった。
本発明は、上記事情に鑑みてなされたもので、その目的は、防水機能の信頼性を向上すると共にコストの低減を図ることの可能なアース用防水構造を提供するところにある。
【０００６】
【課題を解決するための手段】
上記の課題を解決するための請求項１の発明に係るアース用防水構造は、円柱状部材を曲げ加工して形成され、接地部へ固着可能な取付部と、この取付部の両端から延出する一対の端子接続部とを一体に備えたアース側端子金具と、被覆電線の端末部が接続される電線接続部と、前記端子接続部が嵌合接続される嵌合部とを一体に備えた電線側端子金具と、筒状をなすと共に、前記電線側端子金具の周囲を覆うように嵌着され、一端側を前記アース側端子金具の外周面に密着させ、他端側を前記被覆電線の被覆部分の外周面に密着させることで前記被覆電線の端末部を塞ぐゴムチューブとを備えているところに特徴を有する。
請求項２の発明に係るアース用防水構造は、円柱状部材を曲げ加工して形成され、接地部へ固着可能な取付部と、この取付部の両端から延出する一対の端子接続部とを一体に備えたアース側端子金具と、被覆電線の端末部が接続される電線接続部と、前記端子接続部が嵌合接続される嵌合部とを一体に備えた電線側端子金具と、前記被覆電線の被覆部分の外周面に密着した状態で前記電線側端子金具の周囲に嵌着される筒状の電線側チューブと、前記アース側端子金具の外周面に密着した状態で嵌着される筒状のアース側チューブと、を備え、前記嵌合接続状態において、電線側とアース側との両チューブのうち一方が他方の外周面に密着することで、両チューブが前記被覆電線の端末部を塞ぐところに特徴を有する。
【０００７】
請求項３の発明は、請求項１または請求項２に記載のものにおいて、前記アース側端子金具は、前記取付部は、略円弧状をなし、その内側にねじの軸部を挿通可能なねじ挿通孔が形成されているところに特徴を有する。
【０００９】
【発明の作用および効果】
請求項１の発明によれば、アース側と電線側との端子金具を嵌合接続して、ゴムチューブで被覆電線の端末部を覆う。ゴムチューブの両端は、アース側端子金具の外周面と被覆電線の被覆部分の外周面とに密着するため、両端側とも密着性を確保しやすく、防水機能の信頼性を向上することができる。また、従来のように半田付けや熱収縮チューブの加熱といった処理を要さないため、コストの低減を図ることができる。
【００１０】
また、アース側端子金具を簡単な構成にできる。
【００１１】
請求項２の発明によれば、ゴムチューブはアース側端子金具又は被覆電線に対して緊密に嵌め付ける必要があるが、仮にゴムチューブが一体の場合には、組付けの際にゴムチューブを予め一方側に装着しておき、両端子金具の嵌合接続と同時に相手側への嵌め付けを行おうとすると大きな力が要り、作業性の低下が懸念される。しかし、予めアース側と電線側との両方にゴムチューブを装着しておき、嵌合接続時に両チューブ同士を嵌め付けるようにすれば、ゴム同士の密着性が高いことから、操作力を比較的小さくでき、作業性が良い。
【００１２】
【発明の実施の形態】
次に本発明の一実施形態について図１から図３を参照して説明する。
本実施形態のアース用防水構造は、図１に示すように、自動車のボディ等の接地部（図示せず）に固着されるアース側端子金具１０と、被覆電線６０の端末部に接続される電線側端子金具２０と、アース側端子金具１０に嵌着されるアース側チューブ３０と、電線側端子金具２０に嵌着される電線側チューブ４０とを備えて構成されている。なお、本発明の「ゴムチューブ」は、アース側チューブ３０と電線側チューブ４０とから構成されている。
【００１３】
アース側端子金具１０は、導電性金属材よりなる円柱状部材を曲げ加工して一体に形成されており、その中央部分が略円弧状をなす取付部１１とされ、その内側に形成されたねじ挿通孔１１Ａへねじ５０の軸部５１を挿通して接地部にねじ止め固定することができるようになっている。アース側端子金具１０の両端部は、取付部１１から径方向外側へ向けて延出され、その先端がそれぞれ後述の電線側端子金具２０と接続可能な端子接続部１２とされている。各端子接続部１２は、先細り形状をなすと共に、その先端から少し基端側寄りの部分には、外面が全周に亘ってくびれた形状のくびれ部１３が形成されている。
【００１４】
電線側端子金具２０は、導電性を有する金属板材により一体に形成され、その後部（図２の左側）に被覆電線６０の端末部が接続されるバレル部２１（本発明の「電線接続部」に相当）を備えている。バレル部２１は、被覆電線６０の端末部における被覆部分６１をかしめ接続するインシュレーションバレル２２と、被覆部分６１から剥き出された芯線部分６２をかしめ接続するワイヤバレル２３とから構成されている。また、電線側端子金具２０の前部には、前記した端子接続部１２と嵌合接続可能な略円筒状の嵌合部２４が形成されている。この嵌合部２４には、前端の開口部２４Ａから端子接続部１２が概ね緊密に嵌入可能とされており、開口部２４Ａよりやや後側に、内側へ向けて全周にわたって突出する係止突部２５が形成され、これが端子接続部１２のくびれ部１３に抜止め状態で係止するようにされている。
【００１５】
アース側チューブ３０は、適度な弾性を有するゴム材よりなり、全体として円筒状をなしている。アース側チューブ３０の後部（図２の右側）には、小径部３１が形成され、小径部３１よりも前側には、小径部３１より径が大きく前方に開口するフード部３２が形成されている。小径部３１にアース側端子金具１０の一端部（端子接続部１２よりも基端側部分）が緊密に挿通されることで、アース側チューブ３０がアース側端子金具１０に保持されると共に、端子接続部１２がフード部３２内に突出する状態になり、かつフード部３２の奥側が水密状に閉塞された状態となる。また、フード部３２の開口縁には、内側に向けて全周にわたって膨出する前部リブ３３が形成されており、この前部リブ３３は後述する電線側チューブ４０の外周面に密着可能とされている。
【００１６】
電線側チューブ４０は、適度な弾性を有するゴム材によって前後に開口する円筒状に形成され、後端の開口は電線挿通孔４１とされ、その孔縁部４１Ａが全周に亘って内側へ張り出している。電線側チューブ４０は、電線側端子金具２０の全体を覆うように装着されて、嵌合部２４の周囲に緊密に嵌め付けられることで保持される。また、電線挿通孔４１には被覆電線６０が挿通され、その孔縁部４１Ａが被覆電線６０の被覆部分６１の外周面に密着することで、電線側チューブ４０の後側が水密状に閉塞される。
【００１７】
本実施形態は以上の構成であり、次にその作用を説明する。
アース側端子金具１０には、一対の端子接続部１２のうち一方又は両方に被覆電線６０の端末部に接続された電線側端子金具２０を接続する。まず、アース側チューブ３０の小径部３１の内側に端子接続部１２を押し込んで貫通させ、端子接続部１２をフード部３２の内側に突出させる。これにより、小径部３１が撓み変形を伴いつつアース側端子金具１０（端子接続部１２よりも基端側部分）に密着し、フード部３２の奥側が水密状態に閉塞される。そして、アース側端子金具１０のねじ挿通孔１１Ａにねじ５０の軸部５１を挿通させて、アース側端子金具１０を接地部にねじ止め固定する。
【００１８】
次に、電線側チューブ４０の電線挿通孔４１に、被覆電線６０に接続された電線側端子金具２０の先端を押し込む。電線側端子金具２０が電線挿通孔４１を通過すると、電線側チューブ４０が嵌合部２４の周囲に密着して保持されるとともに、電線側チューブ４０が電線側端子金具２０全体を覆う状態になる。また、電線挿通孔４１の孔縁部４１Ａが被覆電線６０の被覆部分６１の外周面に密着して、電線側チューブ４０の奥側が水密状に閉塞される（図２参照）。
【００１９】
続いて、アース側端子金具１０と電線側端子金具２０とを接続するには、まず、電線側端子金具２０及び電線側チューブ４０を前端からアース側チューブ３０のフード部３２の内側に押し込み、端子接続部１２の先端を開口部２４Ａから嵌合部２４内に差し入れる。端子接続部１２の先端が係止突部２５の内側に押し込まれると、係止突部２５が径方向外側へ撓み変形する。そして、端子接続部１２が正規の深さまで嵌合されると、係止突部２５が復帰変形してくびれ部１３に係止する（図３参照）。これにより、電線側端子金具２０とアース側端子金具１０とが抜止め状態で接続される。また、フード部３２の前部リブ３３は、電線側チューブ４０の外周面に密着し、これにより、アース側チューブ３０のフード部３２と電線側チューブ４０とに覆われた領域が水密状態となり、被覆電線６０の端末部からの被覆部分６１の内側への浸水が防止される。以上により、被覆電線６０のアース接続作業が完了する。
【００２０】
以上のように本実施形態によれば、アース側と電線側の端子金具１０，２０を嵌合接続して、ゴムチューブ３０，４０で被覆電線６０の端末部を覆う。ゴムチューブ３０，４０の両端（小径部３１及び電線挿通孔４１の孔縁部４１Ａ）は、円柱状のアース側端子金具１０の外周面と被覆電線６０の被覆部分６１の外周面とに密着するため、両端側とも密着性を確保しやすく、防水機能の信頼性を向上することができる。また、従来のように半田付けや熱収縮チューブの加熱といった処理を要さないため、コストの低減を図ることができる。
【００２１】
また、アース側端子金具１０は、円柱状部材を曲げ加工して形成されているため、簡単な構成にできる。
【００２２】
また、ゴムチューブはアース側端子金具又は被覆電線に対して緊密に嵌め付ける必要があるが、仮にゴムチューブが一体の場合には、組付けの際にゴムチューブを予め一方側に装着しておき、両端子金具の嵌合接続と同時に相手側への嵌め付けを行おうとすると大きな力が要り、作業性の低下が懸念される。しかし、予めアース側と電線側との両方にゴムチューブ３０，４０を装着しておき、嵌合接続時に両チューブ３０，４０同士を嵌め付けるようにすれば、ゴム同士の密着性が高いことから、操作力を比較的小さくでき、作業性が良い。
【００２３】
本発明の技術的範囲は、上記した実施形態によって限定されるものではなく、例えば、次に記載するようなものも本発明の技術的範囲に含まれる。
（１）上記実施形態では、ゴムチューブをアース側と電線側とにそれぞれ設けたが、本発明によれば、ゴムチューブは１つのみでも良い。
（２）上記実施形態では、アース側端子金具が一対の端子接続部を備えているものを示したが、本発明によれば、アース側端子金具に備えられる端子接続部の数は１つ又は３つ以上でも良い。
【図面の簡単な説明】
【図１】本実施形態のアース用防水構造を示す分解斜視図
【図２】アース側端子金具と電線側端子金具との嵌合接続前の状態を示す断面図
【図３】アース側端子金具と電線側端子金具との嵌合接続が完了した状態を示す断面図
【符号の説明】
１０…アース側端子金具
１１…取付部
１２…端子接続部
２０…電線側端子金具
２１…電線接続部
２４…嵌合部
３０…アース側チューブ(ゴムチューブ）
４０…電線側チューブ（ゴムチューブ）
６０…被覆電線
６１…被覆部分[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof structure for grounding.
[0002]
[Prior art]
In automobile engine rooms, etc., connect a grounding terminal to the other end of the wire connected to the electrical component via a connector, and secure it to the grounding part of the body. I have to. Generally, the terminal fitting for grounding includes a mounting portion fixed to the grounding portion with a bolt or the like, and a barrel portion to which the end portion of the electric wire is connected, and the barrel portion is exposed from the covered portion of the electric wire. The core wire part is caulked.
[0003]
In such a configuration, since the connector connected to the electric wire has a waterproof structure, the inside is in an airtight state, and the inside may become a negative pressure due to a temperature change or the like. Therefore, when water adheres to the terminal portion of the electric wire, the water may be sucked into the electric wire through the gaps between the core wires.
[0004]
Conventionally, a measure using a heat-shrinkable tube as a countermeasure is described in, for example, Japanese Utility Model Publication No. 4-23061. In this device, a tube having heat shrinkability is placed on a barrel portion crimped to a terminal portion of an electric wire, and the tube is adhered to and covered with the terminal portion by heating. As another method, there is a method in which the entire barrel portion is soldered to cover the core portion, and two methods may be used in combination.
[0005]
[Problems to be solved by the invention]
However, the heat-shrinkable tube does not have sufficient adhesion to the terminal fittings, and the solder is difficult to penetrate into the gaps between the core wires. The reliability of the function was not enough. In addition, both methods have a problem of cost.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a grounding waterproof structure capable of improving the reliability of the waterproof function and reducing the cost.
[0006]
[Means for Solving the Problems]
The waterproof structure for grounding according to the invention of claim 1 for solving the above-mentioned problem is formed by bending a cylindrical member, and can be fixed to a grounding part, and extends from both ends of the mounting part. A ground-side terminal fitting integrally provided with a pair of terminal connection portions, a wire connection portion to which a terminal portion of the covered electric wire is connected, and a fitting portion to which the terminal connection portion is fitted and connected The wire-side terminal fitting has a cylindrical shape and is fitted so as to cover the periphery of the wire-side terminal fitting, with one end being brought into close contact with the outer peripheral surface of the ground-side terminal fitting and the other end being covered with the covered wire And a rubber tube that closes the end portion of the covered electric wire by being brought into close contact with the outer peripheral surface of the covered portion.
The ground waterproof structure according to the invention of claim 2 is formed by bending a cylindrical member, and includes an attachment portion that can be fixed to a grounding portion, and a pair of terminal connection portions that extend from both ends of the attachment portion. A ground side terminal fitting provided integrally, a wire connecting portion to which a terminal portion of a covered electric wire is connected, and a wire side terminal fitting integrally provided with a fitting portion to which the terminal connecting portion is fitted and connected; A cylindrical wire-side tube fitted around the wire-side terminal fitting in close contact with the outer peripheral surface of the covered portion of the covered wire, and fitted in close contact with the outer peripheral surface of the ground-side terminal fitting. A tubular earth side tube, and in the fitted and connected state, one of the tubes on the electric wire side and the earth side is in close contact with the other outer peripheral surface, so that both tubes are the end portions of the covered electric wires. It has a feature to block.
[0007]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the ground side terminal fitting has a substantially arc shape in the mounting portion, and a screw into which a shaft portion of the screw can be inserted. It is characterized in that the insertion hole is formed.
[0009]
Operation and effect of the invention
According to the first aspect of the present invention, the terminal fittings of the covered wire are covered with the rubber tube by fitting and connecting the terminal fittings on the ground side and the wire side. Since both ends of the rubber tube are in close contact with the outer peripheral surface of the ground-side terminal fitting and the outer peripheral surface of the covered portion of the covered electric wire, it is easy to ensure close contact with both end sides, and the reliability of the waterproof function can be improved. Further, since the processing such as soldering and heating of the heat-shrinkable tube is not required unlike the prior art, the cost can be reduced.
[0010]
In addition , the ground side terminal fitting can be simply configured.
[0011]
According to the invention of claim 2 , the rubber tube needs to be tightly fitted to the ground side terminal fitting or the covered electric wire. However, if the rubber tube is integrated, the rubber tube is preliminarily attached at the time of assembly. If it is mounted on one side and both terminal fittings are fitted and connected to the other side at the same time, a large force is required and there is a concern that workability will be reduced. However, if rubber tubes are attached to both the ground side and the wire side in advance, and the tubes are fitted together during the mating connection, the adhesion between the rubbers is high, so the operating force is relatively low. Can be made small and workability is good.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the waterproof structure for ground according to the present embodiment is connected to a ground-side terminal fitting 10 fixed to a grounding part (not shown) such as a body of an automobile and a terminal part of a covered electric wire 60. The electric wire side terminal fitting 20, the earth side tube 30 fitted to the earth side terminal fitting 10, and the electric wire side tube 40 fitted to the electric wire side terminal fitting 20 are configured. The “rubber tube” of the present invention is composed of the ground side tube 30 and the wire side tube 40.
[0013]
The ground-side terminal fitting 10 is integrally formed by bending a cylindrical member made of a conductive metal material, and a central portion thereof is a mounting portion 11 having a substantially arc shape, and a screw formed inside thereof. The shaft portion 51 of the screw 50 can be inserted into the insertion hole 11A and fixed to the grounding portion with screws. Both end portions of the ground-side terminal fitting 10 are extended radially outward from the attachment portion 11, and the tip ends thereof are terminal connection portions 12 that can be connected to a wire-side terminal fitting 20 described later. Each terminal connecting portion 12 has a tapered shape, and a constricted portion 13 whose outer surface is constricted over the entire circumference is formed in a portion slightly closer to the proximal end side from the distal end.
[0014]
The wire-side terminal fitting 20 is integrally formed of a conductive metal plate material, and a barrel portion 21 (the “wire connection portion” of the present invention) in which the terminal portion of the covered wire 60 is connected to the rear portion (left side in FIG. 2). Equivalent). The barrel portion 21 includes an insulation barrel 22 for caulking and connecting a covering portion 61 at a terminal portion of the covered electric wire 60, and a wire barrel 23 for caulking and connecting a core wire portion 62 exposed from the covering portion 61. In addition, a substantially cylindrical fitting portion 24 that can be fitted and connected to the terminal connection portion 12 is formed at the front portion of the wire-side terminal fitting 20. The terminal connecting portion 12 can be fitted into the fitting portion 24 almost tightly from the opening 24A at the front end, and is a locking protrusion that protrudes from the opening 24A slightly rearward to the inside around the entire circumference. A portion 25 is formed, and this is locked to the constricted portion 13 of the terminal connection portion 12 in a retaining state.
[0015]
The ground side tube 30 is made of a rubber material having appropriate elasticity, and has a cylindrical shape as a whole. A small-diameter portion 31 is formed in the rear portion (right side in FIG. 2) of the ground side tube 30, and a hood portion 32 having a diameter larger than the small-diameter portion 31 and opening forward is formed in front of the small-diameter portion 31. . The ground side tube 30 is held by the ground side terminal fitting 10 by inserting one end of the ground side terminal fitting 10 into the small diameter portion 31 (a portion closer to the base end than the terminal connecting portion 12). The connecting portion 12 protrudes into the hood portion 32 and the back side of the hood portion 32 is closed in a watertight manner. In addition, a front rib 33 bulging over the entire circumference toward the inside is formed at the opening edge of the hood portion 32, and this front rib 33 can be in close contact with the outer peripheral surface of the electric wire side tube 40 described later. Has been.
[0016]
The wire side tube 40 is formed in a cylindrical shape that opens back and forth with a rubber material having appropriate elasticity, the opening at the rear end is a wire insertion hole 41, and the hole edge portion 41A projects inward over the entire circumference. ing. The electric wire side tube 40 is attached so as to cover the entire electric wire side terminal fitting 20 and is held by being closely fitted around the fitting portion 24. Further, the covered electric wire 60 is inserted into the electric wire insertion hole 41, and the hole edge portion 41A is in close contact with the outer peripheral surface of the covered portion 61 of the covered electric wire 60, so that the rear side of the electric wire side tube 40 is closed in a watertight manner. .
[0017]
The present embodiment has the above configuration, and the operation thereof will be described next.
The ground-side terminal fitting 10 is connected to the wire-side terminal fitting 20 connected to the terminal portion of the covered electric wire 60 on one or both of the pair of terminal connection portions 12. First, the terminal connection part 12 is pushed and penetrated inside the small diameter part 31 of the ground side tube 30, and the terminal connection part 12 is projected inside the hood part 32. As a result, the small diameter portion 31 is brought into close contact with the ground side terminal fitting 10 (base end side portion relative to the terminal connection portion 12) while being deformed, and the back side of the hood portion 32 is closed in a watertight state. Then, the shaft portion 51 of the screw 50 is inserted into the screw insertion hole 11A of the ground side terminal fitting 10 to fix the ground side terminal fitting 10 to the grounding portion with screws.
[0018]
Next, the tip of the wire-side terminal fitting 20 connected to the covered wire 60 is pushed into the wire insertion hole 41 of the wire-side tube 40. When the wire-side terminal fitting 20 passes through the wire insertion hole 41, the wire-side tube 40 is held in close contact with the periphery of the fitting portion 24, and the wire-side tube 40 covers the entire wire-side terminal fitting 20. . Further, the hole edge portion 41A of the electric wire insertion hole 41 is in close contact with the outer peripheral surface of the covered portion 61 of the covered electric wire 60, and the inner side of the electric wire side tube 40 is closed in a watertight manner (see FIG. 2).
[0019]
Subsequently, in order to connect the ground-side terminal fitting 10 and the wire-side terminal fitting 20, first, the wire-side terminal fitting 20 and the wire-side tube 40 are pushed into the inside of the hood portion 32 of the ground-side tube 30 from the front end. The distal end of the connection part 12 is inserted into the fitting part 24 from the opening 24A. When the tip of the terminal connecting portion 12 is pushed into the inside of the locking projection 25, the locking projection 25 is bent and deformed radially outward. Then, when the terminal connecting portion 12 is fitted to the proper depth, the locking projection 25 is restored and deformed and locked to the constricted portion 13 (see FIG. 3). Thereby, the electric wire side terminal metal fitting 20 and the earth side terminal metal fitting 10 are connected in the retaining state. Further, the front rib 33 of the hood portion 32 is in close contact with the outer peripheral surface of the electric wire side tube 40, whereby the region covered with the hood portion 32 of the ground side tube 30 and the electric wire side tube 40 becomes watertight, Infiltration of the inside of the covered portion 61 from the end portion of the covered wire 60 is prevented. Thus, the ground connection operation of the covered electric wire 60 is completed.
[0020]
As described above, according to the present embodiment, the terminal fittings 10 and 20 on the ground side and the electric wire side are fitted and connected, and the end portions of the covered electric wires 60 are covered with the rubber tubes 30 and 40. Both ends of the rubber tubes 30 and 40 (the small-diameter portion 31 and the hole edge portion 41A of the wire insertion hole 41) are in close contact with the outer peripheral surface of the cylindrical earth-side terminal fitting 10 and the outer peripheral surface of the covering portion 61 of the covered electric wire 60. Therefore, it is easy to ensure adhesion on both ends, and the reliability of the waterproof function can be improved. Further, since the processing such as soldering and heating of the heat-shrinkable tube is not required unlike the prior art, the cost can be reduced.
[0021]
Moreover, since the earth side terminal metal fitting 10 is formed by bending a cylindrical member, it can be configured simply.
[0022]
In addition, the rubber tube must be tightly fitted to the ground side terminal fitting or the covered electric wire, but if the rubber tube is integrated, the rubber tube should be attached to one side in advance when assembling. When attempting to fit the mating connection of both terminal fittings at the same time as the mating connection, a large force is required and there is a concern that workability will be reduced. However, if the rubber tubes 30 and 40 are attached to both the ground side and the electric wire side in advance, and the tubes 30 and 40 are fitted to each other at the time of fitting connection, the adhesion between the rubbers is high. The operating force can be made relatively small and the workability is good.
[0023]
The technical scope of the present invention is not limited by the above-described embodiments, and, for example, those described below are also included in the technical scope of the present invention.
(1) In the above embodiment, the rubber tube is provided on each of the ground side and the electric wire side. However, according to the present invention, only one rubber tube may be provided.
(2) In the above embodiment, the earth side terminal fitting is provided with a pair of terminal connection portions. However, according to the present invention, the number of terminal connection portions provided in the earth side terminal fitting is one or Three or more may be sufficient.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a grounding waterproof structure according to the present embodiment. FIG. 2 is a cross-sectional view showing a state before mating connection between a ground terminal fitting and a wire terminal fitting. Sectional view showing the state where the mating connection between the cable and the terminal fitting on the wire side is completed [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Earth side terminal metal fitting 11 ... Mounting part 12 ... Terminal connection part 20 ... Electric wire side terminal metal fitting 21 ... Electric wire connection part 24 ... Fitting part 30 ... Earth side tube (rubber tube)
40 ... Wire side tube (rubber tube)
60 ... covered wire 61 ... covered portion

Claims

円柱状部材を曲げ加工して形成され、接地部へ固着可能な取付部と、この取付部の両端から延出する一対の端子接続部とを一体に備えたアース側端子金具と、
被覆電線の端末部が接続される電線接続部と、前記端子接続部が嵌合接続される嵌合部とを一体に備えた電線側端子金具と、
筒状をなすと共に、前記電線側端子金具の周囲を覆うように嵌着され、一端側を前記アース側端子金具の外周面に密着させ、他端側を前記被覆電線の被覆部分の外周面に密着させることで前記被覆電線の端末部を塞ぐゴムチューブとを備えていることを特徴とするアース用防水構造。An earth side terminal fitting integrally formed with a mounting portion that is formed by bending a cylindrical member and can be fixed to the grounding portion, and a pair of terminal connection portions extending from both ends of the mounting portion,
An electric wire side terminal fitting integrally provided with an electric wire connecting portion to which a terminal portion of the covered electric wire is connected and an engaging portion to which the terminal connecting portion is fitted and connected;
It has a cylindrical shape and is fitted so as to cover the periphery of the wire-side terminal fitting. A grounding waterproof structure comprising: a rubber tube that closes the end portion of the covered electric wire by being in close contact therewith.

円柱状部材を曲げ加工して形成され、接地部へ固着可能な取付部と、この取付部の両端から延出する一対の端子接続部とを一体に備えたアース側端子金具と、An earth side terminal fitting integrally formed with a mounting portion that is formed by bending a cylindrical member and can be fixed to the grounding portion, and a pair of terminal connecting portions extending from both ends of the mounting portion,
被覆電線の端末部が接続される電線接続部と、前記端子接続部が嵌合接続される嵌合部とを一体に備えた電線側端子金具と、  An electric wire side terminal fitting integrally provided with an electric wire connecting portion to which a terminal portion of the covered electric wire is connected and an engaging portion to which the terminal connecting portion is fitted and connected;
前記被覆電線の被覆部分の外周面に密着した状態で前記電線側端子金具の周囲に嵌着される筒状の電線側チューブと、  A cylindrical wire-side tube fitted around the wire-side terminal fitting in close contact with the outer peripheral surface of the covered portion of the covered wire;
前記アース側端子金具の外周面に密着した状態で嵌着される筒状のアース側チューブと、を備え、  A cylindrical earth side tube fitted in close contact with the outer peripheral surface of the earth side terminal fitting,
前記嵌合接続状態において、電線側とアース側との両チューブのうち一方が他方の外周面に密着することで、両チューブが前記被覆電線の端末部を塞ぐことを特徴とするアース用防水構造。In the fitting connection state, one of the tubes on the electric wire side and the ground side is in close contact with the outer peripheral surface of the other, so that both tubes close the end portion of the covered electric wire, .

前記取付部は、略円弧状をなし、その内側にねじの軸部を挿通可能なねじ挿通孔が形成されていることを特徴とする請求項１または請求項２に記載のアース用防水構造。The waterproof structure for ground according to claim 1 or 2 , wherein the attachment portion has a substantially arc shape, and a screw insertion hole through which a shaft portion of the screw can be inserted is formed.