JP2014164957A

JP2014164957A - Electric wire connection structure

Info

Publication number: JP2014164957A
Application number: JP2013034047A
Authority: JP
Inventors: Akira Tachibana; 昭頼橘; Kengo Mitose; 賢悟水戸瀬; Kyota Suzai; 京太須齋; Retsu Suzuki; 烈鈴木
Original assignee: Furukawa Electric Co Ltd; Furukawa Automotive Systems Inc
Current assignee: Furukawa Electric Co Ltd; Furukawa Automotive Systems Inc
Priority date: 2013-02-24
Filing date: 2013-02-24
Publication date: 2014-09-08

Abstract

PROBLEM TO BE SOLVED: To provide an electric wire connection structure capable of preventing corrosion of a core wire by suppressing infiltration of water by reducing negative pressure.SOLUTION: Disclosed is an electric wire connection structure 10 in which an electric wire 13 and a tube-shaped terminal 11 are crimped and joined together. A vent hole 39 is provided in the boundary 17 between an insulation part 15 and a core wire 14 exposed by stripping off the insulation part 15 of the electric wire 13 or in a portion of the tube-shaped terminal 11 corresponding to the insulation part 15 side rather than this boundary 17, thereby capable of suppressing water movement in the longitudinal direction due to a capillary phenomenon by reducing negative pressure generated in the tube-shaped terminal 11 without using an airtight cut-off means such as a filler.

Description

本発明は、電気導通を担う部品に関し、より詳しくは、電線と、この電線の端部に接続される管状端子とから構成された電線接続構造体に関する。 The present invention relates to a component responsible for electrical continuity, and more particularly to an electric wire connection structure including an electric wire and a tubular terminal connected to an end portion of the electric wire.

従来、芯線を絶縁体で被覆して形成された電線は、絶縁体を剥離して露出させた芯線端部に金属端子が圧着接続される。従来の電線と端子の接続構造では、絶縁体が剥離された芯線端部の表面は剥き出しになっているため、車両等の用途に適用すると、電線が雨水等に晒された場合や高温や高湿の環境下で長時間走行した場合などに、芯線が腐食し易いという問題があった。
例えば、自動車等に使用されるワイヤハーネスでは、近年、自動車の燃費向上を目的として軽量化を図るために、芯線の材料がこれまでの銅系材料からアルミニウムあるいはアルミニウム合金等のアルミ系材料へ置き換えられてきている。アルミ系材料の芯線を電線に用いて、圧着部の金属端子に銅系材料を用いた場合、電線を構成する金属（アルミ系材料）と金属端子を構成する金属（銅系材料）において電位差が生じる。このとき、電線と端子の接続部に水分等が付着した場合、電線の導体（芯線）は露出しているため、異種金属間腐食が発生し、いずれかの金属の腐食が進行してしまう。アルミ系材料と銅系材料の異種金属間腐食においては、アルミ系材料が腐食により減肉してしまう。そのため電線接続部において、接触不良が生じてしまう恐れがあった。 Conventionally, in an electric wire formed by covering a core wire with an insulator, a metal terminal is crimped and connected to the end portion of the core wire that is exposed by peeling off the insulator. In the conventional wire-terminal connection structure, the surface of the end of the core wire from which the insulator has been peeled is exposed. Therefore, when applied to applications such as vehicles, the wire is exposed to rainwater, etc. When running for a long time in a humid environment, there is a problem that the core wire is easily corroded.
For example, in the case of wire harnesses used in automobiles, in recent years, the core wire material has been replaced with aluminum-based materials such as aluminum or aluminum alloys in order to reduce the weight for the purpose of improving the fuel efficiency of automobiles. It has been. When the core wire of aluminum material is used for the electric wire and the copper material is used for the metal terminal of the crimping part, there is a potential difference between the metal constituting the electric wire (aluminum material) and the metal constituting the metal terminal (copper material). Arise. At this time, when moisture or the like adheres to the connecting portion between the electric wire and the terminal, the conductor (core wire) of the electric wire is exposed, so that corrosion between different metals occurs and corrosion of any metal proceeds. In the corrosion between dissimilar metals of an aluminum-based material and a copper-based material, the aluminum-based material is thinned by the corrosion. For this reason, there is a risk that poor contact may occur in the wire connection portion.

このような金属の腐食の原因となる水への対策が施された電線接続構造体として、端子のスリーブ部分の内部に長手方向に水が移動するのを防止する止水手段としてのコンパウンドや防水リングを設けたもの（例えば、特許文献１参照）や、電線の絶縁部の端部を止水剤で塞ぐものが知られている（例えば、特許文献２参照）。 As a wire connection structure with countermeasures against water causing such metal corrosion, a compound or waterproof as a water stop means for preventing water from moving in the longitudinal direction inside the sleeve portion of the terminal There are known ones provided with a ring (see, for example, Patent Document 1) and those in which an end portion of an insulating portion of an electric wire is closed with a water-stopping agent (for example, see Patent Document 2).

特開２０１１−２３３６７号公報JP 2011-23367 A 特開２００８−２８２６７３号公報JP 2008-282673 A

上記の特許文献１、特許文献２のように、電線と端子との間を密封し、外部からの水を遮断したとしても、電線の端子から離れた部分に、例えば、車両のエンジンルーム等の温度上昇部位があると、電線やこの電線の周囲をシールするシール部に膨張が起こり、上記端子側には負圧が生じることがある。負圧が生じると、電線の上記端子とは反対側の他端から上記端子側に、絶縁部、端子間、芯線を構成する複数の素線間、芯線、絶縁部間のわずかな隙間を毛細管現象によって水が伝ってくることがあり、その水が芯線の端子接続部を腐食させるおそれがある。
本発明は、上述した事情を鑑みてなされたものであり、負圧を減ずることで水の浸入を抑制し、芯線腐食を防止可能な電線接続構造体を提供することを目的としている。 Even if it seals between an electric wire and a terminal like the above-mentioned patent documents 1 and patent documents 2, and intercepts the water from the outside, in the part away from the terminal of an electric wire, for example, an engine room of a vehicle etc. If there is a temperature rise portion, expansion may occur in the electric wire and the seal portion that seals the periphery of the electric wire, and negative pressure may be generated on the terminal side. When negative pressure is generated, a small gap is formed between the other end of the electric wire opposite to the terminal from the other end to the terminal side, between the insulating portions, between the terminals, between the plurality of strands constituting the core wire, and between the core wires and the insulating portion. Depending on the phenomenon, water may be transmitted, and the water may corrode the terminal connection portion of the core wire.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the electric wire connection structure which suppresses permeation of water by reducing a negative pressure and can prevent core wire corrosion.

上述した課題を解決するため、本発明は、電線と管状端子とを圧着結合した電線接続構造体において、前記電線の電線絶縁部が剥がされて露出した電線導体と前記電線絶縁部との境界又はこの境界より前記電線絶縁部側に対応する前記管状端子の部位に、前記管状端子内の負圧を減ずる通気孔を設けたことを特徴とする。
この構成によれば、管状端子に通気孔を設けることで、充填材等の密封止水手段を用いることなく管状端子内に生じる負圧を減じて、管状端子内への毛細管現象による長手方向の水移動を抑制することができ、芯線腐食を防止することができる。 In order to solve the above-described problem, the present invention provides a wire connection structure in which an electric wire and a tubular terminal are bonded by crimping, and the boundary between the electric wire conductor exposed by peeling off the electric wire insulation portion of the electric wire and the electric wire insulation portion or A vent hole for reducing the negative pressure in the tubular terminal is provided in a portion of the tubular terminal corresponding to the wire insulating portion side from the boundary.
According to this configuration, by providing the tubular terminal with a vent hole, the negative pressure generated in the tubular terminal can be reduced without using a sealing water means such as a filler, and the longitudinal direction due to capillary action into the tubular terminal can be reduced. Water movement can be suppressed, and core wire corrosion can be prevented.

上記構成において、前記管状端子に、内側にエア溜りを有する膨出部を設け、この膨出部に前記通気孔を設けても良い。この構成によれば、エア溜りを設けることで、水をエア溜りに臨ませて蒸発させやすくすることができ、水蒸気として通気孔からの排出を促すことができる。
また、上記構成において、前記管状端子は、板条が筒状に成形され、合わせ目が溶接されて密封構造に形成されたものであっても良い。この構成によれば、密封構造の管状端子であってもその内部に通気孔により負圧を発生しにくくすることができる。 In the above configuration, the tubular terminal may be provided with a bulging portion having an air reservoir inside, and the vent hole may be provided in the bulging portion. According to this configuration, by providing the air reservoir, it is possible to easily evaporate the water by facing the air reservoir, and it is possible to promote the discharge from the vent hole as water vapor.
Moreover, the said structure WHEREIN: The said tubular terminal may be formed in the sealing structure by shape | molding the strip in the cylinder shape, and welding the seam. According to this structure, even if it is a tubular terminal of a sealing structure, it can be made hard to generate a negative pressure by the vent hole inside.

また、上記構成において、前記電線導体は、アルミニウム又はアルミニウム合金製であっても良い。この構成によれば、管状端子が銅などの異種金属であっても、アルミニウム又はアルミニウム合金製の電線導体の腐食を防止しつつ電線接続構造体の軽量化を図ることができる。
また、上記構成において、前記通気孔を覆うように通気性防水材を付加するようにしても良い。この構成によれば、外部から通気孔への水の浸入を防止することができ、芯線腐食をより一層防止することができる。 In the above configuration, the electric wire conductor may be made of aluminum or an aluminum alloy. According to this structure, even if a tubular terminal is dissimilar metals, such as copper, weight reduction of an electric wire connection structure can be achieved, preventing the corrosion of the electric wire conductor made from aluminum or aluminum alloy.
Moreover, in the said structure, you may make it add a breathable waterproof material so that the said vent hole may be covered. According to this configuration, water can be prevented from entering from the outside into the vent hole, and core wire corrosion can be further prevented.

また、上記構成において、前記通気性防水材は、粘性充填材、粘着テープ状、粘着シート状又は粘着フィルム状であっても良い。この構成によれば、これらの通気性防水材を管状端子に簡単に設けることができる。
また、上記構成において、前記通気性防水材は、ＰＴＦＥ多孔質膜であっても良い。この構成によれば、ＰＴＦＥ多孔質膜は、通気性と共に撥水性も備えるため、外部から通気孔への水の浸入を効果的に防止することができ、芯線腐食をより一層防止することができる。 Moreover, the said structure WHEREIN: The said air permeable waterproof material may be a viscous filler, an adhesive tape shape, an adhesive sheet shape, or an adhesive film shape. According to this configuration, these breathable waterproof materials can be easily provided on the tubular terminal.
Moreover, the said structure WHEREIN: The said breathable waterproof material may be a PTFE porous membrane. According to this configuration, the porous PTFE membrane has air repellency as well as water repellency. Therefore, it is possible to effectively prevent water from entering the vent holes from the outside, and to further prevent core wire corrosion. .

また、本発明は、電線の両端に管状端子を圧着結合した電線接続構造体において、両管状端子間の電線絶縁部に該電線絶縁部内の負圧を減ずる通気孔を設け、該通気孔を覆うように通気性防水材を付加することを特徴とする。
この構成によれば、電線絶縁部に通気孔を設けることで、充填材等の密封止水手段を用いることなく電線絶縁部内に生じる負圧を減じて、電線絶縁部内への毛細管現象による長手方向の水移動を抑制することができ、芯線腐食を防止することができる。 Further, the present invention provides a wire connection structure in which a tubular terminal is bonded to both ends of an electric wire by providing a ventilation hole for reducing negative pressure in the wire insulation part in the wire insulation part between the tubular terminals, and covering the ventilation hole. As described above, a breathable waterproof material is added.
According to this configuration, by providing a ventilation hole in the electric wire insulation portion, the negative pressure generated in the electric wire insulation portion can be reduced without using a sealing water means such as a filler, and the longitudinal direction due to capillary action into the electric wire insulation portion Water movement can be suppressed, and core wire corrosion can be prevented.

本発明は、管状端子構造及び絶縁部構造によって、充填材等の密封止水手段を用いることなく管状端子内もしくは電線内に生じる負圧を減じて毛細管現象による長手方向の水移動を抑制することができ、芯線腐食を防止することができる。 The present invention suppresses water movement in the longitudinal direction due to capillary phenomenon by reducing negative pressure generated in the tubular terminal or the electric wire without using a sealing water means such as a filler by the tubular terminal structure and the insulating part structure. And core wire corrosion can be prevented.

第１実施形態にかかる電線接続構造体を示す斜視図である。It is a perspective view which shows the electric wire connection structure concerning 1st Embodiment. 電線接続構造体の長手方向断面を示す要部断面図である。It is principal part sectional drawing which shows the longitudinal direction cross section of an electric wire connection structure. 圧着接合する前の管状端子と電線とを示す斜視図である。It is a perspective view which shows the tubular terminal and electric wire before crimping joining. エア溜り部及び通気孔の作用を示す作用図である。It is an operation | movement figure which shows the effect | action of an air reservoir and a vent hole. 芯線と絶縁部との境界に対応する管状端子の部位に通気孔を設けた構造を示す断面図である。It is sectional drawing which shows the structure which provided the vent hole in the site | part of the tubular terminal corresponding to the boundary of a core wire and an insulation part. 第２実施形態にかかる電線接続構造体を示す斜視図である。It is a perspective view which shows the electric wire connection structure concerning 2nd Embodiment. 電線を説明する断面図である。It is sectional drawing explaining an electric wire.

以下、図面を参照して本発明の一実施形態について説明する。
＜第１実施形態＞
図１は、第１実施形態の電線接続構造体１０を示す斜視図である。
図１に示すように、電線接続構造体１０は、管状端子１１と、この管状端子１１に圧着結合された電線１３と、管状端子１１の環状かしめ部３０の端部に巻かれた通気性防水フィルム１６とを備える。管状端子１１は、雌型端子のボックス部２０と管状かしめ部３０とを有し、これらの橋渡しとしてトランジション部４０を有する。
管状端子１１は、導電性と強度を確保するために基本的に金属材料（本実施形態では、銅または銅合金）の基材で製造されている。なお、管状端子１１の基材は、銅または銅合金に限るものではなく、アルミニウムや鋼、またはこれらを主成分とする合金等を用いることもできる。
また、管状端子１１は、端子としての種々の特性を担保するために、例えば管状端子１１の一部あるいは全部にスズ、ニッケル、銀めっきまたは金等のめっき処理が施されていても良い。また、めっきのみならず、スズ等のリフロー処理を施しても良い。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a perspective view showing a wire connection structure 10 according to the first embodiment.
As shown in FIG. 1, the wire connection structure 10 includes a tubular terminal 11, an electric wire 13 that is pressure-bonded to the tubular terminal 11, and a breathable waterproofing wound around the end of the annular crimping portion 30 of the tubular terminal 11. A film 16. The tubular terminal 11 includes a female terminal box portion 20 and a tubular caulking portion 30, and includes a transition portion 40 as a bridge between them.
The tubular terminal 11 is basically made of a base material made of a metal material (copper or copper alloy in this embodiment) in order to ensure conductivity and strength. In addition, the base material of the tubular terminal 11 is not limited to copper or a copper alloy, and aluminum, steel, an alloy containing these as a main component, or the like can also be used.
Moreover, in order to ensure various characteristics as a terminal, the tubular terminal 11 may be subjected to, for example, a plating process such as tin, nickel, silver plating, or gold on part or all of the tubular terminal 11. Further, not only plating but also reflow treatment of tin or the like may be performed.

管状端子１１のボックス部２０は、例えば雄型端子等の挿入タブの挿入を許容する雌型端子のボックス部である。本発明において、このボックス部２０の細部の形状は特に限定されない。すなわち、管状端子１１は、少なくともトランジション部４０を介して管状かしめ部３０を備えていれば良く、例えばボックス部を有さなくても良いし、例えばボックス部が雄型端子の挿入タブであっても良い。また、管状かしめ部３０に他の形態に係る端子端部が接続された形状であっても良い。本明細書では、本発明の管状端子を説明するために便宜的に雌型ボックスを備えた例を示している。 The box portion 20 of the tubular terminal 11 is a female terminal box portion that allows insertion of an insertion tab such as a male terminal. In the present invention, the shape of the details of the box portion 20 is not particularly limited. That is, the tubular terminal 11 only needs to have the tubular caulking portion 30 via at least the transition portion 40. For example, the tubular terminal 11 does not have to have a box portion. For example, the box portion is an insertion tab of a male terminal. Also good. Moreover, the shape by which the terminal edge part which concerns on another form to the tubular crimping part 30 was connected may be sufficient. In this specification, in order to explain the tubular terminal of the present invention, an example in which a female box is provided for convenience is shown.

図２は、電線接続構造体１０の長手方向断面を示す要部断面図である。
電線１３は、例えば、金属または合金からなる素線１４ａを束ねた芯線１４を、絶縁樹脂（例えば、ポリ塩化ビニル）で構成する絶縁部１５で被覆して構成される。芯線１４は、所定の断面積となるように、素線１４ａを撚って構成しているが、この形態に限定されるものではなく単線で構成しても良い。
なお、芯線を構成する金属材料は、高い導電性を有する金属であればよく、アルミニウムまたはアルミニウム合金の他、銅または銅合金を用いても良い。 FIG. 2 is a cross-sectional view of the main part showing a longitudinal section of the wire connection structure 10.
The electric wire 13 is configured, for example, by covering a core wire 14 in which strands 14a made of metal or alloy are bundled with an insulating portion 15 made of an insulating resin (for example, polyvinyl chloride). The core wire 14 is formed by twisting the strands 14a so as to have a predetermined cross-sectional area. However, the core wire 14 is not limited to this form and may be formed by a single wire.
In addition, the metal material which comprises a core wire should just be a metal which has high electroconductivity, and may use copper or a copper alloy other than aluminum or an aluminum alloy.

管状かしめ部３０は、管状端子１１と電線１３とを圧着接合する部位である。管状かしめ部３０の一端は、電線１３を挿入することができる電線挿入口３１を有し、他端はトランジション部４０に接続されている。管状かしめ部３０のトランジション部４０側は、溶接等の手段によって閉口しており、トランジション部４０側から水分等が浸入しないように形成されている。
管状端子１１の金属基材（銅または銅合金）と芯線１４（アルミニウムまたはアルミニウム合金）との接合部に水分が付着すると、両金属の起電力（イオン化傾向）の差から芯線１４が腐食する。また、管状端子１１と芯線１４とがアルミニウム同士であっても微妙な合金組成の違いによって、それらの接合部は腐食しやすい。 The tubular caulking portion 30 is a part that crimps and joins the tubular terminal 11 and the electric wire 13. One end of the tubular caulking portion 30 has an electric wire insertion port 31 into which the electric wire 13 can be inserted, and the other end is connected to the transition portion 40. The transition portion 40 side of the tubular caulking portion 30 is closed by means such as welding, and is formed so that moisture or the like does not enter from the transition portion 40 side.
When moisture adheres to the joint between the metal substrate (copper or copper alloy) of the tubular terminal 11 and the core wire 14 (aluminum or aluminum alloy), the core wire 14 corrodes due to the difference in electromotive force (ionization tendency) between the two metals. Further, even if the tubular terminal 11 and the core wire 14 are made of aluminum, their joints are easily corroded due to a subtle difference in alloy composition.

本構成では、管状かしめ部３０は、有底の管状に形成されることにより、外部より水分等の浸入が抑制され、管状端子１１と電線１３との接合部の腐食を抑えることができる。なお、管状かしめ部３０は、管状であれば腐食に対して一定の効果を得られるため、必ずしも長手方向に対して円筒である必要はなく、場合によっては楕円や矩形の管であっても良い。また、径が一定である必要はなく、長手方向で半径が変化していても良い。 In this configuration, the tubular caulking portion 30 is formed in a bottomed tubular shape, so that intrusion of moisture and the like is suppressed from the outside, and corrosion of the joint portion between the tubular terminal 11 and the electric wire 13 can be suppressed. If the tubular caulking portion 30 is tubular, a certain effect against corrosion can be obtained. Therefore, the tubular caulking portion 30 is not necessarily cylindrical with respect to the longitudinal direction, and may be an elliptical or rectangular tube depending on circumstances. . Further, the diameter does not need to be constant, and the radius may change in the longitudinal direction.

管状かしめ部３０は、例えば、銅または銅合金からなる条材を平面展開した形状に打ち抜き、曲げ加工によって形成される。この場合、ボックス部を一体に設けても良い。
平面状態からの曲げ加工した際に、かしめ部に相当する部位はＣ字型断面となっているので、開放された両端部を突き合わせて溶接等によって接合することで、管状かしめ部３０が形成される。管状かしめ部３０の接合は、レーザ溶接が好ましいが、電子ビーム溶接、超音波溶接、抵抗溶接等の溶接法でもかまわない。また、はんだ、ろう等、接続媒体を使っての接合でも良い。また、管状かしめ部３０は、上記したＣ字型断面の両端部を接合する方法に限らず、深絞り工法で形成されても良い。さらに、連続管を切断するとともに一端側を閉塞して、管状かしめ部３０を形成しても良い。 The tubular caulking portion 30 is formed, for example, by punching a strip made of copper or a copper alloy into a flattened shape and bending it. In this case, the box portion may be provided integrally.
Since the portion corresponding to the caulking portion has a C-shaped cross section when bent from a flat state, the tubular caulking portion 30 is formed by joining both open ends and joining them by welding or the like. The The tubular caulking portion 30 is preferably joined by laser welding, but welding methods such as electron beam welding, ultrasonic welding, and resistance welding may also be used. Also, joining using a connection medium such as solder or solder may be used. The tubular caulking portion 30 is not limited to the method of joining both end portions of the C-shaped cross section, and may be formed by a deep drawing method. Furthermore, the tubular crimping portion 30 may be formed by cutting the continuous tube and closing one end side.

管状かしめ部３０では、管状かしめ部３０を構成する金属基材と電線１３とが機械的な圧着接合されることにより、同時に電気的な接合を確保する。かしめ接合は、基材や電線（芯線）の塑性変形によって接合が行われる。従って、管状かしめ部３０は、かしめ接合をすることができるように肉厚を設計される必要があるが、人力加工や機械加工等で接合を自由に行うことができるので、特に限定されるものではない。 In the tubular caulking portion 30, the metal base material constituting the tubular caulking portion 30 and the electric wire 13 are mechanically pressure-bonded to ensure electrical joining at the same time. The caulking is performed by plastic deformation of a base material or an electric wire (core wire). Accordingly, the tubular caulking portion 30 needs to be designed to have a thickness so that it can be caulked and joined, but since it can be joined freely by manual machining or machining, it is particularly limited. is not.

芯線に用いられるアルミニウムまたはアルミニウム合金は、銅及び銅合金と比較すると接触抵抗が高いため、接続に不安がある。このため、管状かしめ部３０の内壁面には、電線挿入口３１から挿入された芯線１４と接触する位置に、電線１３の周方向に延びる電線係止溝（不図示）を設け、電線１３との接触圧を保つ構成としても良い。 Since aluminum or aluminum alloy used for the core wire has higher contact resistance than copper and copper alloy, there is anxiety in connection. For this reason, the inner wall surface of the tubular caulking portion 30 is provided with a wire locking groove (not shown) extending in the circumferential direction of the electric wire 13 at a position in contact with the core wire 14 inserted from the electric wire insertion port 31. The contact pressure may be maintained.

管状端子１１と電線１３とは管状かしめ部３０によって圧着接合されている。本実施形態では、管状かしめ部３０は、導体圧着縮径部３５および被覆圧着縮径部３６を備え、被覆圧着縮径部３６は、半径方向外側に膨出する環状の膨出部３７を備えている。被覆圧着縮径部３６のうち、膨出部３７は圧着されない。
通常、圧着接合すると、導体圧着縮径部３５および被覆圧着縮径部３６がそれぞれ塑性変形を起こして、元の径よりも縮径されることで、電線１３の芯線先端部１４ｂおよび被覆先端部（圧着部）１５ａと圧着接合される。
管状かしめ部３０と電線１３とを圧着する場合には、導体圧着縮径部３５および被覆圧着縮径部３６を、アンビル及びクリンプ（不図示）等の治具を用いて部分的に強圧縮することで塑性変形させる。図２に示した例では、導体圧着縮径部３５が、縮径率が一番高くなっている部分である。 The tubular terminal 11 and the electric wire 13 are crimped and joined by a tubular caulking portion 30. In the present embodiment, the tubular caulking portion 30 includes a conductor crimping reduced diameter portion 35 and a coated crimping reduced diameter portion 36, and the coated crimping reduced diameter portion 36 includes an annular bulging portion 37 that bulges radially outward. ing. Of the coated crimped reduced diameter portion 36, the bulging portion 37 is not crimped.
Usually, when crimped and joined, the conductor crimped reduced diameter portion 35 and the coated crimped reduced diameter portion 36 are each plastically deformed and are reduced in diameter from the original diameter, so that the core wire tip 14b and the sheath tip of the wire 13 are reduced. (Press-bonding part) 15a and pressure-bonded.
When the crimping portion 30 and the electric wire 13 are crimped, the conductor crimping reduced diameter portion 35 and the coated crimping reduced diameter portion 36 are partially strongly compressed using a jig such as an anvil and a crimp (not shown). To cause plastic deformation. In the example shown in FIG. 2, the conductor crimping reduced diameter portion 35 is a portion having the highest diameter reduction ratio.

ところで、管状かしめ部３０では、芯線１４を強圧縮して導通を維持する機能と、絶縁部１５を圧縮してシール性を維持する機能とが要求される。被覆圧着縮径部３６では、その断面を略正円にかしめ、絶縁部１５の全周に渡ってほぼ同等の圧力を与えることにより、全周に渡って均一な弾性反発力を発生させて、シール性を得ることが好ましい。
一方、実際の圧着工程では、アンビル上にセットした導体圧着縮径部３５および被覆圧着縮径部３６を備えた管状端子１１に、適切な長さの絶縁部１５をストリップした芯線先端部１４ｂを挿入し、上方からクリンパを下降させ、圧力を加えて、導体圧着縮径部３５および被覆圧着縮径部３６を、かしめる（圧着する）工法が取られている。 By the way, the tubular caulking portion 30 is required to have a function of strongly compressing the core wire 14 to maintain conduction and a function of compressing the insulating portion 15 to maintain sealing performance. In the coated crimping reduced diameter portion 36, the cross section thereof is caulked into a substantially circular shape, and by applying substantially the same pressure over the entire circumference of the insulating portion 15, a uniform elastic repulsive force is generated over the entire circumference, It is preferable to obtain a sealing property.
On the other hand, in the actual crimping step, the core wire tip 14b obtained by stripping the insulating portion 15 of an appropriate length is attached to the tubular terminal 11 provided with the conductor crimping reduced diameter portion 35 and the covering crimping reduced diameter portion 36 set on the anvil. A method is employed in which the crimper is lowered from above, the pressure is applied, and the conductor crimping reduced diameter portion 35 and the coated crimping reduced diameter portion 36 are caulked (crimped).

膨出部３７は、内側に形成された周方向に連通する環状のエア溜り部３８と、このエア溜り部３８を外部に連通させる複数の通気孔３９とが形成された部分であり、管状かしめ部３０内に発生する負圧を減じることで管状かしめ部３０内への水の浸入を抑制するとともに、管状かしめ部３０内の水分を通気孔３９を通じて排出する役目をする。従って、特に止水手段を設けることなく、管状端子１１と共に芯線１４への水の接触を抑制して、腐食を防止することができる。このように、環状のエア溜り部３８を設けることで、周方向の各部から水を集めることができ、外部に排出しやすくすることができる。
通気孔３９は、芯線１４の芯線先端部１４ｂと絶縁部１５との境界１７（一点鎖線で示した部分）又は境界１７より絶縁部１５側に対応する管状端子１１の部位に通気孔３９を設けている。 The bulging portion 37 is a portion formed with an annular air reservoir 38 formed on the inner side and communicating in the circumferential direction, and a plurality of vent holes 39 that allow the air reservoir 38 to communicate with the outside. By reducing the negative pressure generated in the portion 30, the intrusion of water into the tubular caulking portion 30 is suppressed, and the water in the tubular caulking portion 30 is discharged through the vent holes 39. Therefore, it is possible to prevent corrosion by suppressing the contact of water with the tubular terminal 11 and the core wire 14 without particularly providing a water stop means. Thus, by providing the annular air reservoir 38, water can be collected from each part in the circumferential direction and can be easily discharged to the outside.
The ventilation hole 39 is provided with a ventilation hole 39 at a boundary 17 (part indicated by a one-dot chain line) between the core wire tip 14b of the core wire 14 and the insulation part 15 or a portion of the tubular terminal 11 corresponding to the insulation part 15 side from the boundary 17. ing.

通気孔３９は、小径であるため、外部から内側に水が入りにくい構造となっているが、外部から通気孔３９への浸水阻止を確実にするために、通気孔３９を塞ぐように膨出部３７及び被覆圧着縮径部３６の外周面全周に通気性防水フィルム１６を貼り付けている。この通気性防水フィルム１６により、通気孔３９からの水分の蒸発を許容しながら、外部から通気孔３９内への水分の浸入を防ぐ。通気性防水フィルム１６は粘着フィルム状であるが、この他に通気性防水材としては、粘性充填材、粘着テープ状、粘着シート状又は粘着フィルム状、あるいはＰＴＦＥ（ポリテトラフルオロエチレン）多孔質膜が好適である。 Since the vent hole 39 has a small diameter, it has a structure in which water does not easily enter from the outside to the inside. However, in order to prevent water from entering the vent hole 39 from the outside, the vent hole 39 bulges to close the vent hole 39. The breathable waterproof film 16 is affixed to the entire outer peripheral surface of the portion 37 and the cover crimping reduced diameter portion 36. The breathable waterproof film 16 prevents moisture from entering the vent hole 39 from the outside while allowing the moisture to evaporate from the vent hole 39. The breathable waterproof film 16 is in the form of an adhesive film. In addition to this, the breathable waterproof material may be a viscous filler, an adhesive tape, an adhesive sheet or an adhesive film, or a PTFE (polytetrafluoroethylene) porous film. Is preferred.

図３は、圧着接合する前の管状端子１１Ａと電線１３とを示す斜視図である。
圧着接合する前の管状端子１１Ａは、雌型端子のボックス部２０と管状部２５とを有し、これらの橋渡しとしてトランジション部４０を有する。管状部２５は、トランジション部４０から次第に大径となる拡径部２６と、この拡径部２６の縁部から筒状に延びる筒部２７とからなる。
拡径部２６には、導体圧着縮径部３５（図１参照）が形成され、筒部２７には、膨出部３７を除く部分に被覆圧着縮径部３６（図１参照）が形成され、膨出部３７に通気孔３９が開けられる。 FIG. 3 is a perspective view showing the tubular terminal 11 </ b> A and the electric wire 13 before being crimped.
11 A of tubular terminals before crimping joining have the box part 20 and the tubular part 25 of a female terminal, and have the transition part 40 as a bridge | bridging of these. The tubular portion 25 includes an enlarged diameter portion 26 that gradually increases in diameter from the transition portion 40, and a cylindrical portion 27 that extends in a cylindrical shape from an edge of the enlarged diameter portion 26.
The enlarged diameter portion 26 is formed with a conductor crimping reduced diameter portion 35 (see FIG. 1), and the cylindrical portion 27 is formed with a coated crimping reduced diameter portion 36 (see FIG. 1) at a portion other than the bulging portion 37. A vent hole 39 is opened in the bulging portion 37.

電線１３の絶縁部１５を構成する樹脂材としては、ポリ塩化ビニルであり、このポリ塩化ビニル以外にも、例えば、架橋ポリ塩化ビニル、クロロプレンゴム等を主成分とするハロゲン系樹脂や、ポリエチレン、架橋ポリエチレン、エチレンプロビレンゴム、珪素ゴム、ポリエステル等を主成分とするハロゲンフリー樹脂が用いられ、これらに可塑剤や難燃剤等の添加剤を含んでいても良い。
一方、管状端子１１Ａは、一部または全部にスズめっき等の処理が施されている。 The resin material constituting the insulating portion 15 of the electric wire 13 is polyvinyl chloride. Besides this polyvinyl chloride, for example, halogen-based resins mainly composed of crosslinked polyvinyl chloride, chloroprene rubber, polyethylene, Halogen-free resins mainly composed of crosslinked polyethylene, ethylene propylene rubber, silicon rubber, polyester, etc. are used, and these may contain additives such as plasticizers and flame retardants.
On the other hand, the tubular terminal 11A is partially or entirely subjected to a treatment such as tin plating.

以上に述べたエア溜り部３８及び通気孔３９の作用を次に説明する。
図４は、エア溜り部３８及び通気孔３９の作用を示す作用図である。
例えば、管状端子１１の圧着部、詳しくは、管状端子１１の被覆圧着縮径部３６と電線１３の被覆先端部１５ａとの隙間へ、矢印Ａ，Ａで示すように毛細管現象により浸入した水は、矢印Ｂ，Ｂで示すようにエア溜り部３８内に至る。また、管状端子１１と芯線１４との間の端子内空間４５に結露等により生じた水は、矢印Ｃ，Ｃで示すように、管状端子１１の被覆圧着縮径部３６と電線１３の被覆先端部１５ａとの隙間を通ってエア溜り部３８内に至る。そして、エア溜り部３８内に集まった水は、次第に通気孔３９を通じて、矢印Ｄ，Ｄに示すように外部に流れ出る。 Next, the operation of the air reservoir 38 and the vent hole 39 described above will be described.
FIG. 4 is an operation diagram showing the operation of the air reservoir 38 and the air vent 39.
For example, as shown by arrows A and A, the water that has entered the crimped portion of the tubular terminal 11 into the gap between the crimped crimped diameter reduced portion 36 of the tubular terminal 11 and the coated distal end portion 15a of the electric wire 13 by capillarity is As shown by arrows B and B, the air reservoir 38 is reached. In addition, water generated by condensation or the like in the terminal inner space 45 between the tubular terminal 11 and the core wire 14 is formed by the coated crimping reduced diameter portion 36 of the tubular terminal 11 and the coated tip of the electric wire 13 as indicated by arrows C and C. The air reservoir 38 is reached through the gap with the portion 15a. The water collected in the air reservoir 38 gradually flows to the outside through the vent holes 39 as indicated by arrows D and D.

このように、管状端子１１と電線１３との圧着接合部を特別に密封構造にすることなく、管状端子１１に、内側にエア溜り部３８を有する膨出部３７を形成し、エア溜り部３８に外部に連通する通気孔３９を設けることで、管状端子１１の内部と外部との温度差や、管状端子１１及び電線１３に作用する振動等により、管状端子１１の内部と外部とに圧力差が発生し、あるいは、管状端子１１及び電線１３の温度上昇が作用することで、管状端子１１内の空間に存在する水を通気孔３９から外部に排出することができる。従って、電線１３への水の接触が抑制され、腐食を防止することができる。 In this way, the bulging portion 37 having the air reservoir portion 38 on the inside is formed in the tubular terminal 11 without specially forming the crimping joint portion between the tubular terminal 11 and the electric wire 13, and the air reservoir portion 38. By providing a vent hole 39 communicating with the outside, a pressure difference between the inside and outside of the tubular terminal 11 due to a temperature difference between the inside and outside of the tubular terminal 11, vibrations acting on the tubular terminal 11 and the electric wire 13, etc. Or when the temperature rise of the tubular terminal 11 and the electric wire 13 acts, the water existing in the space in the tubular terminal 11 can be discharged from the vent hole 39 to the outside. Therefore, contact of water with the electric wire 13 is suppressed, and corrosion can be prevented.

図５は、芯線１４と絶縁部１５との境界に対応する管状端子１１の部位に通気孔４９を設けた構造を示す断面図である。
管状端子１１は、被覆圧着縮径部３６の縁に膨出部４７が形成され、この膨出部４７の内側にエア溜り部４８が形成され、エア溜り部４８が外部と通気孔４９と連通している。また、通気孔４９は、管状端子１１と芯線１４との間の端子内空間５１に一体に設けられる。
通気孔４９が、境界１７より芯線先端部１４ｂ側に形成されると、エア溜り部４８と端子内空間５１とが一つの大きな空間となり、水を通気孔４９を通じて外部に放出するよりも内部に保水する容量が大きくなる。従って、通気孔４９は、境界１７の位置か、あるいは境界１７よりも絶縁部１５側に設けるのが良い。 FIG. 5 is a cross-sectional view showing a structure in which a vent hole 49 is provided in a portion of the tubular terminal 11 corresponding to the boundary between the core wire 14 and the insulating portion 15.
In the tubular terminal 11, a bulging portion 47 is formed at the edge of the cover crimping reduced diameter portion 36, an air reservoir 48 is formed inside the bulged portion 47, and the air reservoir 48 communicates with the outside and the vent hole 49. doing. The vent hole 49 is integrally provided in the terminal internal space 51 between the tubular terminal 11 and the core wire 14.
When the air hole 49 is formed on the core wire tip 14b side from the boundary 17, the air reservoir 48 and the terminal internal space 51 become one large space, and the water hole 48 is formed inside rather than discharging the water to the outside through the air hole 49. Capacity to retain water increases. Therefore, the vent hole 49 is preferably provided at the position of the boundary 17 or closer to the insulating portion 15 than the boundary 17.

次に、実験例１について説明する。
（実験例１）
管状端子１１の基材として、古河電気工業製の銅合金ＦＡＳ−６８０（厚さ０．２５ｍｍ、Ｈ材）を用いた。ＦＡＳ−６８０の合金組成は、ニッケル（Ｎｉ）を２．０〜２．８質量％、シリコン（Ｓｉ）を０．４５〜０．６質量％、亜鉛（Ｚｎ）を０．４〜０．５５質量％、スズ（Ｓｎ）を０．１〜０．２５質量％、およびマグネシウム（Ｍｇ）を０．０５〜０．２質量％含有し、残部が銅（Ｃｕ）および不可避不純物である。
管状かしめ部３０は、曲げ加工されたＣ字型断面の両端部を突き合わせ、内径３．２ｍｍとなるようにレーザ溶接した。 Next, Experimental Example 1 will be described.
(Experimental example 1)
A copper alloy FAS-680 (thickness: 0.25 mm, H material) manufactured by Furukawa Electric was used as the base material for the tubular terminal 11. The alloy composition of FAS-680 is nickel (Ni) 2.0-2.8 mass%, silicon (Si) 0.45-0.6 mass%, zinc (Zn) 0.4-0.55. It contains 0.1% to 0.25% by mass of tin (Sn) and 0.05 to 0.2% by mass of magnesium (Mg), with the balance being copper (Cu) and inevitable impurities.
The tubular caulking portion 30 was subjected to laser welding so that both end portions of the bent C-shaped cross section were abutted and the inner diameter was 3.2 mm.

電線１３の芯線１４は、合金組成が鉄（Ｆｅ）を約０．２質量％、銅（Ｃｕ）を約０．２質量％、マグネシウム（Ｍｇ）を約０．１質量％、シリコン（Ｓｉ）を約０．０４質量％、残部がアルミニウム（Ａｌ）および不可避不純物であるアルミ合金線（線径０．４２ｍｍ）を素線１４ａとして用いた。この素線１４ａを１９本用いて２．５ｓｑ、１９本撚りの芯線１４にした。 The core wire 14 of the electric wire 13 has an alloy composition of about 0.2% by mass of iron (Fe), about 0.2% by mass of copper (Cu), about 0.1% by mass of magnesium (Mg), and silicon (Si). Is about 0.04 mass%, the balance is aluminum (Al) and an aluminum alloy wire (wire diameter 0.42 mm) which is an unavoidable impurity. 19 strands 14a were used to form a core wire 14 of 2.5 sq, 19 strands.

また、電線１３の絶縁部１５は、ハロゲンフリー樹脂としてエチレン酢酸ビニル共重合体を用い、芯線１４の周囲を外径が２．８ｍｍ、絶縁厚０．３５ｍｍとなるように押出し法により形成した。芯線１４の外径は２．１ｍｍである。 Moreover, the insulation part 15 of the electric wire 13 used the ethylene vinyl acetate copolymer as halogen-free resin, and formed the circumference | surroundings of the core wire 14 by the extrusion method so that an outer diameter might be 2.8 mm and insulation thickness 0.35 mm. The outer diameter of the core wire 14 is 2.1 mm.

電線１３は、ワイヤストリッパを用いて電線端部の絶縁部１５を剥離して芯線１４を露出させる。この状態で電線１３を管状端子１１の管状かしめ部３０に差し込み、管状かしめ部３０の導体圧着縮径部３５および被覆圧着縮径部３６を、アンビル及びクリンパを用いて部分的に強圧縮することで圧着結合する。
圧着後、被覆圧着縮径部３６を１６０℃で２分間加熱した。通気孔３９は通気性防水フィルムで覆い、他端を防水シール構造のコネクタを接続して試料（実施例１）とした。 The electric wire 13 peels off the insulating portion 15 at the end of the electric wire using a wire stripper to expose the core wire 14. In this state, the electric wire 13 is inserted into the tubular crimping portion 30 of the tubular terminal 11, and the conductor crimping reduced diameter portion 35 and the coated crimping reduced diameter portion 36 of the tubular crimping portion 30 are partially strongly compressed using an anvil and a crimper. Crimp and bond with.
After crimping, the coated crimped reduced diameter portion 36 was heated at 160 ° C. for 2 minutes. The vent hole 39 was covered with a breathable waterproof film, and a connector with a waterproof seal structure was connected to the other end to obtain a sample (Example 1).

テスト方法としては、防水コネクタ側のコネクタキャビティに水噴霧して８０℃に加熱、そして常温冷却を２０サイクル繰り返した。テスト終了後に、防水コネクタ側のケーブルを解体して、素線間、芯線１４、絶縁部１５間の水分移動状態を観察した。この結果、素線間では７０ｍｍ、芯線１４、絶縁部１５間では２０ｍｍの水移動距離が認められたものの、管状端子１１側への水移動はいずれも認められなかった。尚、通気性防水フィルムとしては、厚さ０．１ｍｍ、幅５ｍｍ、耐水度２０ｋＰａの粘着フィルムを用いた。 As a test method, the connector cavity on the waterproof connector side was sprayed with water, heated to 80 ° C., and cooled to room temperature for 20 cycles. After the test was completed, the cable on the waterproof connector side was disassembled, and the moisture movement state between the strands, the core wire 14 and the insulating portion 15 was observed. As a result, a water movement distance of 70 mm was observed between the strands and 20 mm between the core wire 14 and the insulating portion 15, but no water movement toward the tubular terminal 11 was observed. As the breathable waterproof film, an adhesive film having a thickness of 0.1 mm, a width of 5 mm and a water resistance of 20 kPa was used.

次に、実験例２について説明する。
（実験例２）
試料として、実施例２、実施例３及び比較例１を作成し、腐食試験を行った。この腐食試験に使用した試料の基本仕様は、実施例１と同一である。
試料内容、試験条件及び評価結果を表１に示す。 Next, Experimental Example 2 will be described.
(Experimental example 2)
As a sample, Example 2, Example 3, and Comparative Example 1 were prepared and subjected to a corrosion test. The basic specifications of the sample used for this corrosion test are the same as those in Example 1.
Table 1 shows sample contents, test conditions, and evaluation results.

腐食試験は、以下の３つの試験を１〜３の順に行ったものである。
１．高温放置（大気加熱で、温度は１２０℃、放置時間は１２０時間）
２．塩水噴霧試験（塩水噴霧溶液（ＮａＣｌ）濃度は５％、試験槽内温度は３５℃、試験時間は９６時間）
３．湿熱放置試験（温度は８５℃、湿度は９５％、時間は９６時間）
また、腐食試験後の圧着部の断面観察を行い、腐食の程度の観察結果を、◎：腐食なし、〇：一部孔食などが見られる（導体径は変わらない）、×：腐食している、とした。 In the corrosion test, the following three tests are performed in the order of 1-3.
1. High temperature storage (at atmospheric heating, temperature is 120 ° C, storage time is 120 hours)
2. Salt spray test (salt spray solution (NaCl) concentration is 5%, test chamber temperature is 35 ° C., test time is 96 hours)
3. Wet heat exposure test (temperature is 85 ° C, humidity is 95%, time is 96 hours)
Also, observe the cross section of the crimped part after the corrosion test, and the observation results of the degree of corrosion are as follows: ◎: No corrosion, ○: Partial pitting corrosion etc. (conductor diameter does not change), ×: Corrosion It was said that.

実施例２では、通気孔があり、通気性防水材がなしで、腐食試験後の結果は、〇（一部孔食などが見られる（導体径は変わらない））であり、判定は、〇（合格）である。
実施例３では、通気孔があり、通気性防水材がありで、腐食試験後の結果は、◎（腐食無し）であり、判定は、〇（合格）である。
比較例１では、通気孔がなし、通気性防水材がなしで、腐食試験後の結果は、×（腐食している）であり、判定は、×（不合格）である。 In Example 2, there is a vent hole, no breathable waterproof material, the result after the corrosion test is ◯ (partial pitting corrosion is observed (conductor diameter does not change)), and the judgment is ◯ (Pass).
In Example 3, there is a vent hole, there is a breathable waterproof material, the result after the corrosion test is ◎ (no corrosion), and the judgment is ◯ (pass).
In Comparative Example 1, there is no vent hole, no breathable waterproof material, the result after the corrosion test is x (corroded), and the judgment is x (fail).

以上の図１〜図３、及び図５に示したように、電線１３と管状端子１１とを圧着結合した電線接続構造体１０において、電線１３の絶縁部１５（電線絶縁部）が剥がされて露出した芯線１４（電線導体）と絶縁部１５との境界１７又はこの境界１７より絶縁部１５側に対応する管状端子１１の部位に、管状端子１１内の負圧を減ずる通気孔３９を設けた。
この構成によれば、管状端子１１に通気孔３９を設けることで、充填材等の密封止水手段を用いることなく管状端子１１内に生じる負圧を減じて、管状端子１１内への毛細管現象による長手方向の水移動を抑制することができ、芯線腐食を防止することができる。 As shown in FIGS. 1 to 3 and FIG. 5, in the wire connection structure 10 in which the electric wire 13 and the tubular terminal 11 are pressure-bonded, the insulating portion 15 (electric wire insulating portion) of the electric wire 13 is peeled off. A vent hole 39 for reducing the negative pressure in the tubular terminal 11 is provided at the boundary 17 between the exposed core wire 14 (wire conductor) and the insulating portion 15 or at the portion of the tubular terminal 11 corresponding to the insulating portion 15 side from the boundary 17. .
According to this configuration, by providing the vent hole 39 in the tubular terminal 11, the negative pressure generated in the tubular terminal 11 can be reduced without using a sealing water means such as a filler, and the capillary phenomenon into the tubular terminal 11 can be achieved. The water movement in the longitudinal direction due to can be suppressed, and the core wire corrosion can be prevented.

また、管状端子１１に、内側にエア溜りとしてのエア溜り部３８を有する膨出部３７を設け、この膨出部３７に通気孔３９を設けたので、水をエア溜り部３８に誘導して蒸発させやすくすることができ、水蒸気として通気孔３９からの排出を促すことができる。
また、管状端子１１は、板条を筒状に成形し、合わせ目を溶接により密封構造とした端子を用いたので、密封構造の管状端子１１であってもその内部に通気孔３９により負圧を発生しにくくすることができる。 Further, the tubular terminal 11 is provided with a bulging portion 37 having an air reservoir portion 38 as an air reservoir inside, and the bulging portion 37 is provided with a vent hole 39, so that water is guided to the air reservoir portion 38. Evaporation can be facilitated, and discharge from the vent hole 39 as water vapor can be promoted.
In addition, since the tubular terminal 11 is a terminal in which a strip is formed into a cylindrical shape and the seam is sealed to form a sealed structure, even if the tubular terminal 11 has a sealed structure, a negative pressure is applied to the inside by the vent hole 39. Can be made difficult to occur.

また、管状端子１１に挿入・圧着される芯線１４が、アルミニウム又はアルミニウム合金製である場合、管状端子１１が銅などの異種金属であっても、アルミニウム又はアルミニウム合金製の芯線１４の腐食を防止しつつ電線１３、ひいては電線接続構造体１０の軽量化を図ることができ、更には電線接続構造体１０を備える車両の軽量化を図ることができる。
また、通気孔３９を覆うように通気性防水材としての通気性防水フィルム１６を付加するので、通気性防水フィルム１６によって、外部から通気孔３９への水の浸入を防止することができ、芯線腐食をより一層防止することができる。 Moreover, when the core wire 14 inserted and crimped | bonded to the tubular terminal 11 is a product made from aluminum or aluminum alloy, even if the tubular terminal 11 is dissimilar metals, such as copper, corrosion of the core wire 14 made from aluminum or aluminum alloy is prevented. However, it is possible to reduce the weight of the electric wire 13 and thus the electric wire connection structure 10, and further reduce the weight of the vehicle including the electric wire connection structure 10.
Further, since the breathable waterproof film 16 as a breathable waterproof material is added so as to cover the vent hole 39, the breathable waterproof film 16 can prevent water from entering the vent hole 39 from the outside, and the core wire. Corrosion can be further prevented.

また、通気性防水材は、粘性充填材、粘着テープ状、粘着シート状又は粘着フィルム状であるので、粘性充填剤を管状端子１１の通気孔３９内に充填したり、粘着テープ状、粘着シート状又は粘着フィルム状の通気性防水材を管状端子１１の外周面に貼り付けたりするのを簡単に行うことができ、作業性を向上させることができる。
また、通気性防水材は、ＰＴＦＥ多孔質膜であるので、通気性と共に撥水性も備えるＰＴＦＥ多孔質膜によって、外部から通気孔３９への水の浸入を効果的に防止することができ、芯線腐食をより一層防止することができる。 Further, since the breathable waterproofing material is in the form of a viscous filler, adhesive tape, adhesive sheet, or adhesive film, the viscous filler is filled into the vent hole 39 of the tubular terminal 11, or the adhesive tape or adhesive sheet. It is possible to easily attach a breathable waterproof material in the form of an adhesive film or an adhesive film to the outer peripheral surface of the tubular terminal 11 and improve workability.
Further, since the breathable waterproof material is a PTFE porous film, the PTFE porous film having air permeability and water repellency can effectively prevent water from entering the vent holes 39 from the outside, and the core wire. Corrosion can be further prevented.

＜第２実施形態＞
図６は、第２実施形態にかかる電線接続構造体６０を示す斜視図であり、図１に示した第１実施形態と同一構成については同一符号を付け、詳細説明は省略する。
電線接続構造体６０は、管状端子６１と、この管状端子６１に圧着結合された電線６２と、この電線６２の被覆を構成する絶縁部６３に巻かれた通気性防水フィルム６４とを備え、管状端子６１に設けられた管状かしめ部６５で電線６２と圧着接合されている。 Second Embodiment
FIG. 6 is a perspective view showing the electric wire connection structure 60 according to the second embodiment. The same components as those in the first embodiment shown in FIG.
The electric wire connection structure 60 includes a tubular terminal 61, an electric wire 62 that is pressure-bonded to the tubular terminal 61, and a breathable waterproof film 64 wound around an insulating portion 63 that constitutes a covering of the electric wire 62. The tubular crimping portion 65 provided on the terminal 61 is crimped and joined to the electric wire 62.

図７は、電線６２を説明する断面図である。図７（Ａ）は図６のＶＩＩ−ＶＩＩ線断面図、図７（Ｂ）は、電線６２の作用を示す作用図である。
図７（Ａ）に示すように、電線６２は、複数の素線１４ａからなる芯線１４と、この芯線１４を覆う絶縁部６３とから構成されている。
芯線１４は、複数の素線１４ａ間に複数の素線間空間６６を有し、絶縁部６３は、これらの素線間空間６６と外部とを連通する通気孔６７が複数形成されている。これらの通気孔６７の外部への開口６７ａは、絶縁部６３の外周面に貼り付けられた通気性防水フィルム６４によって覆われている。 FIG. 7 is a cross-sectional view illustrating the electric wire 62. 7A is a cross-sectional view taken along line VII-VII in FIG. 6, and FIG. 7B is an operation diagram showing an operation of the electric wire 62.
As shown in FIG. 7A, the electric wire 62 includes a core wire 14 composed of a plurality of strands 14a and an insulating portion 63 that covers the core wire 14.
The core wire 14 has a plurality of inter-element spaces 66 between the plurality of element wires 14a, and the insulating portion 63 is formed with a plurality of vent holes 67 that connect the inter-element spaces 66 and the outside. Openings 67 a to the outside of these ventilation holes 67 are covered with a breathable waterproof film 64 attached to the outer peripheral surface of the insulating portion 63.

以上に述べた通気孔６７及び通気性防水フィルム６４の作用を次に説明する。
図７（Ｂ）に示すように、電線６２の素線間空間６６は、通気孔６７を介して外部に開放されているため、素線間空間６６に水が存在していると、矢印Ｆ，Ｆで示すように、水が素線間空間６６から通気孔６７側へ移動し、更に、矢印Ｇ，Ｇで示すように、通気孔６７から外部に流出（蒸発）する。従って、素線間空間６６は、乾燥した状態を保つことができ、また、素線間空間６６内に水が存在していたとしても、その水が、管状端子６１（図６参照）と電線６２との圧着部側へ移動しにくくなり、芯線１４は、管状端子６１との接触部で腐食するのが抑制される。また、通気孔６７は、通気性防水フィルム６４で覆われているので、外部から通気孔６７に水が入り込みにくくなり、芯線１４における水の影響をより一層回避することができる。 Next, the operation of the vent hole 67 and the breathable waterproof film 64 described above will be described.
As shown in FIG. 7B, the inter-element space 66 of the electric wire 62 is opened to the outside via the vent hole 67. Therefore, when water exists in the inter-element space 66, the arrow F , F, the water moves from the inter-element space 66 to the vent hole 67 side, and further flows out (evaporates) from the vent hole 67 to the outside as indicated by arrows G and G. Accordingly, the inter-element space 66 can be kept dry, and even if water is present in the inter-element space 66, the water is connected to the tubular terminal 61 (see FIG. 6) and the electric wire. It becomes difficult to move to the crimping | compression-bonding part side with 62, and it is suppressed that the core wire 14 corrodes in a contact part with the tubular terminal 61. FIG. Further, since the air hole 67 is covered with the air permeable waterproof film 64, it is difficult for water to enter the air hole 67 from the outside, and the influence of water on the core wire 14 can be further avoided.

以上の図６及び図７（Ａ），（Ｂ）に示したように、電線６２の両端に管状端子６１を圧着結合した電線接続構造体６０において、両管状端子６１，６１間の絶縁部６３に絶縁部６３内の負圧を減ずる通気孔６７を設け、この通気孔６７を覆うように通気性防水材６４を付加する。
この構成によれば、絶縁部６３に通気孔６７を設けることで、充填材等の密封止水手段を用いることなく絶縁部６３内に生じる負圧を減じて、絶縁部６３内への毛細管現象による長手方向の水移動を抑制することができ、芯線腐食を防止することができる。 As shown in FIG. 6 and FIGS. 7A and 7B, in the wire connection structure 60 in which the tubular terminals 61 are crimped to both ends of the wire 62, the insulating portion 63 between the tubular terminals 61 and 61 is used. A ventilation hole 67 for reducing the negative pressure in the insulating part 63 is provided in the insulation part 63, and a breathable waterproof material 64 is added so as to cover the ventilation hole 67.
According to this configuration, by providing the air hole 67 in the insulating portion 63, the negative pressure generated in the insulating portion 63 can be reduced without using a sealing water means such as a filler, and the capillary phenomenon into the insulating portion 63 can be achieved. The water movement in the longitudinal direction due to can be suppressed, and the core wire corrosion can be prevented.

上述した実施形態は、あくまでも本発明の一態様を示すものであり、本発明の主旨を逸脱しない範囲で任意に変形及び応用が可能である。
例えば、上記実施形態において、図２及び図３に示したように、管状端子１１の管状かしめ部３０の周方向に連続するように膨出部３７を形成したが、これに限らず、周方向に一箇所又は数か所別々に膨出部を形成し、それぞれの膨出部に通気孔を形成しても良い。
本発明は、自動車のワイヤハーネスに適用可能であるが、これに限らず、他の車両の配線や、車両以外の装置等の配線に適用しても良い。 The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
For example, in the above embodiment, as shown in FIGS. 2 and 3, the bulging portion 37 is formed so as to be continuous in the circumferential direction of the tubular caulking portion 30 of the tubular terminal 11. Alternatively, the bulges may be formed separately at one place or several places, and a vent hole may be formed in each bulge.
The present invention can be applied to a wire harness of an automobile, but is not limited to this, and may be applied to wiring of other vehicles or wiring of devices other than vehicles.

１０，６０電線接続構造体
１１，１１Ａ，６１管状端子
１３，６２電線
１４芯線（電線導体）
１５，６３絶縁部（電線絶縁部）
１６，６４通気性防水フィルム（通気性防水材）
１７境界
３７膨出部
３８エア溜り部（エア溜り）
３９，６７通気孔 10, 60 Wire connection structure 11, 11A, 61 Tubular terminal 13, 62 Wire 14 Core wire (wire conductor)
15, 63 Insulation (wire insulation)
16,64 Breathable waterproof film (breathable waterproof material)
17 boundary 37 bulge 38 air reservoir (air reservoir)
39,67 Vent

Claims

In the electric wire connection structure in which the electric wire and the tubular terminal are bonded by pressure bonding,
The negative pressure in the tubular terminal is reduced to the boundary between the wire conductor exposed by peeling off the wire insulation portion of the wire and the wire insulation portion or to the portion of the tubular terminal corresponding to the wire insulation portion side from this boundary. An electric wire connection structure provided with a vent hole.

The wire connection structure according to claim 1, wherein the tubular terminal is provided with a bulging portion having an air reservoir inside, and the vent hole is provided in the bulging portion.

The wire connection structure according to claim 1 or 2, wherein the tubular terminal is formed in a sealed structure by forming a strip into a cylindrical shape and welding a joint.

The electric wire connection structure according to any one of claims 1 to 3, wherein the electric wire conductor is made of aluminum or an aluminum alloy.

The wire connection structure according to any one of claims 1 to 4, wherein a breathable waterproof material is added so as to cover the vent hole.

The wire connection structure according to claim 5, wherein the breathable waterproof material is in the form of a viscous filler, an adhesive tape, an adhesive sheet, or an adhesive film.

The wire connection structure according to claim 5 or 6, wherein the breathable waterproof material is a PTFE porous membrane.

In the wire connection structure in which the tubular terminals are crimped to both ends of the wire,
An electric wire connection structure characterized in that a vent hole for reducing negative pressure in the electric wire insulation portion is provided in the electric wire insulation portion between both tubular terminals, and a breathable waterproof material is added so as to cover the vent hole.