WO2016194566A1 - Terminal-equipped electric wire and method for producing same - Google Patents

Terminal-equipped electric wire and method for producing same Download PDF

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Publication number
WO2016194566A1
WO2016194566A1 PCT/JP2016/064024 JP2016064024W WO2016194566A1 WO 2016194566 A1 WO2016194566 A1 WO 2016194566A1 JP 2016064024 W JP2016064024 W JP 2016064024W WO 2016194566 A1 WO2016194566 A1 WO 2016194566A1
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Prior art keywords
terminal
electric wire
anticorrosive agent
anticorrosive
core wire
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PCT/JP2016/064024
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French (fr)
Japanese (ja)
Inventor
直之 鴛海
敏夫 米谷
慶次 土持
孝幸 寺内
幸康 坂本
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株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Publication of WO2016194566A1 publication Critical patent/WO2016194566A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors

Definitions

  • Patent Document 1 applies a first UV curable resin having a low viscosity before curing to the terminal connection part, allows the resin to penetrate into the gap between the connection parts, and then the viscosity before curing.
  • the second UV curable resin having a high thickness is applied to form an anticorrosive having a sufficient film thickness.
  • the electric wire with terminal of the present invention is An electric wire with a terminal provided with an anticorrosive agent-applied portion in which an anticorrosive agent is applied to a connection portion in which a terminal is connected to an end portion of a covered electric wire whose conductor is covered with an insulator,
  • Application of the anticorrosive agent is performed by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion,
  • the anticorrosive has a viscosity at room temperature of 1000 to 30000 mPa ⁇ s.
  • the conductor of the covered electric wire is an aluminum metal
  • the terminal metal fitting is a copper metal
  • the connecting portion is a dissimilar metal connecting portion
  • the manufacturing method of the electric wire with terminal of the present invention is as follows.
  • a method for producing a terminal-attached electric wire comprising an anticorrosive agent-applied part in which an anticorrosive agent is applied to a connection part in which a terminal is connected to an end part of a covered electric wire whose conductor is covered with an insulator,
  • Application of the anticorrosive agent is performed by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion,
  • the anticorrosive has a viscosity at room temperature of 1000 to 30000 mPa ⁇ s.
  • the anticorrosive agent uses a curable resin, and the anticorrosive agent is applied at room temperature.
  • the anticorrosive agent is applied by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion. It is easy, and it is possible to reliably apply the anticorrosive agent only to the necessary part. In that case, by setting the viscosity of the anticorrosive in the range of 1000 to 30000 mPa ⁇ s, it is possible to sufficiently penetrate the anticorrosive into the necessary part, and the anticorrosive adheres to the unnecessary part, It is possible to prevent a problem that the anticorrosive is not applied to a necessary portion. As a result, corrosion of the electric contact portion of the electric wire conductor of the electric wire with terminal and the terminal fitting can be satisfactorily suppressed. Moreover, according to this invention, it is possible to manufacture the said electric wire with a terminal easily.
  • FIG. 1 is a front view showing an embodiment of a terminal-attached electric wire according to the present invention.
  • the terminal-attached electric wire 110 is formed by crimping a terminal 130 on a covered electric wire 120, and the core wire 121 and the terminal 130 of the covered electric wire 120 are made of different metals.
  • an example of the electric wire 110 with a terminal is shown.
  • the covered electric wire 120 is formed by covering a core wire 121 made of an aluminum (or aluminum alloy) wire as a conductor with a covering material 124 formed of an insulator such as a resin.
  • the core wire 121 is formed by twisting a plurality of aluminum (aluminum alloy) wires. And the edge part of the covered electric wire 120 is processed so that the coating
  • the portion of the core wire 121 where the coating material 124 is peeled off and exposed is sometimes referred to as a core wire end portion.
  • the insulated wire 120 can be an insulated wire used for an automobile wire harness.
  • the core wire 121 of the covered electric wire 120 can be composed of a stranded wire formed by twisting a plurality of strands.
  • the stranded wire may be composed of one type of metal strand, or may be composed of two or more types of metal strand.
  • the twisted wire may contain the strand etc. which consist of organic fibers other than a metal strand. Note that “consisting of one type of metal strand” means that all the metal strands constituting the stranded wire are made of the same metal material, and “consisting of two or more types of metal strands” This means that the wire contains metal wires made of different metal materials.
  • the stranded wire may include a reinforcing wire (tension member) for reinforcing the covered electric wire.
  • Examples of the material of the metal wire constituting the core wire 121 include copper, copper alloy, aluminum, or materials obtained by plating these materials in addition to the aluminum alloy. Moreover, as a material of the metal strand as a reinforcement wire, a copper alloy, titanium, tungsten, stainless steel etc. can be illustrated. Examples of the organic fiber as the reinforcing wire include Kevlar. As a metal strand used for the core wire 121, it is preferable to use aluminum or aluminum alloy from the point of weight reduction of an electric wire.
  • the material of the covering material 124 used for the covered electric wire 120 is not particularly limited, and examples thereof include rubber, polyolefin, vinyl chloride resin (PVC), and thermoplastic elastomer. These may be used alone or in admixture of two or more.
  • Various additives may be appropriately added to the material of the covering material 124. Examples of the additive include a flame retardant, a filler, a colorant and the like.
  • the terminal 130 is formed long in one direction, and has a terminal fitting portion 112, a core wire crimping portion 114, and a covering crimping portion 116 in that order from the distal end side to the proximal end side in the longitudinal direction.
  • the terminal fitting portion 112, the core wire crimping portion 114, and the covering crimping portion 116 of the terminal 130 are formed so as to be separated from each other.
  • the terminal 130 is integrally formed by punching a metal plate such as a copper plate or a tin-plated copper plate, bending it, or the like.
  • a metal plate such as a copper plate or a tin-plated copper plate, bending it, or the like.
  • the terminal 130 may be a male terminal.
  • the metal plate used for the terminal 130 may be, for example, a metal plate made of various copper alloys such as brass and copper alloy in addition to the copper plate.
  • various metal platings such as nickel, gold, and silver can be used for plating.
  • a male terminal (not shown) is inserted and connected to the terminal fitting portion 112 of the terminal 130 in a fitting manner.
  • it is formed in a cylindrical shape (more specifically, a rectangular tube shape) penetrating along the longitudinal direction of the terminal 130.
  • a contact piece 113 for contacting a male terminal is provided inside the terminal fitting portion 112.
  • the proximal end portion of the terminal 130 with respect to the terminal fitting portion 112 is such that the core crimping portion 114 and the covering crimping portion 116 are connected to the terminal 130 from a part of the bottom 118 extending from a part of the terminal fitting portion 112 in the longitudinal direction of the terminal 130. It is formed so as to protrude toward one side orthogonal to the longitudinal direction. More specifically, in a state where the core wire crimping portion 114 and the covering crimping portion 116 are not crimped to the electric wire 120, the end of the electric wire 120 can be disposed from one side (the protruding side of the core wire crimping portion 114 and the covering crimping portion 116). Thus, it is formed in the cross-sectional view substantially U shape which the said one side opens.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and shows a portion of the core wire exposed portion 122b.
  • the anticorrosive agent 80 at the core wire exposed portion 122 b covers the entire periphery of the core wire 121 without any gaps.
  • 3 is a cross-sectional view taken along the line BB of FIG. 1, and shows a portion of the core wire exposed portion 122a.
  • the anticorrosive agent 80 in the portion of the core wire exposed portion 122 a covers the periphery of the core wire 121 on the core wire exposed portion 122 a side.
  • the core wire exposed portion 122 is completely covered with the anticorrosive agent 80 so that it is not exposed to the outside.
  • the anticorrosive agent 80 covers the upper surface and side surfaces of the connection portion with a predetermined thickness along the shape of the outer periphery of the terminal 130 and the covered wire 120.
  • the outside of the bottom surface of the terminal 130 is not covered with the anticorrosive 7 and the metal of the terminal 130 is exposed to the outside.
  • the method described in Japanese Patent No. 5299210 can be used as a specific method for applying the anticorrosive to the connection portion.
  • the method described in Japanese Patent No. 5299210 can be used.
  • an example of the coating method will be described.
  • a device for applying a composition of the anticorrosive agent 80 (hereinafter sometimes referred to as the anticorrosive agent 80) in the vicinity of the contact portion between the core wire exposed portion 122 and the terminal 130 is used.
  • the apparatus shown in FIG. 4 includes a jet part 30 and is formed so that an anticorrosive can be jetted from the jet part.
  • the jet part 30 is composed of two nozzles 30a and 30b each having an opening that opens upward.
  • the nozzles 30a and 30b are configured to open upward and be able to guide the anticorrosive agent 80 upward.
  • the nozzle 30a is disposed corresponding to the core wire exposed portion 122a of the terminal-attached electric wire 110.
  • the nozzle 30b is disposed corresponding to the core wire exposed portion 122b on the coated crimping portion 116 side of the electric wire 110 with terminal.
  • the jet part 30 immerses the core wire exposed part 122 of the terminal-attached electric wire in the jetted anti-corrosive agent 80, whereby the anticorrosive agent 80 comes into contact with the connection part of the terminal-attached electric wire 110, and the composition of the anticorrosive agent is applied to the core wire exposed part. Applied.
  • the anticorrosive agent 80 is preferably applied to the core wire exposed portion 122 and the core wire crimping portion 114 and the bottom portion 118 of the terminal 130 adjacent to the core wire exposed portion 122.
  • the anticorrosive agent 80 applied to the inner surface of the core exposed portion 122 is likely to gather on the opposite side of the bottom portion 118, and the anticorrosive agent 80 applied to the terminal fitting portion 112 side can be prevented from flowing in and adhering thereto. .
  • the coating amount is managed by defining the viscosity range.
  • a film thickness can be adjusted by adjusting the speed which raises the electric wire with a terminal made to contact the anticorrosive from a jet apparatus, for example.
  • the upper limit of the viscosity of the anticorrosive agent is preferably 20000 mPa ⁇ s or less, and more preferably 6000 mPa ⁇ s or less, from the viewpoint that the anticorrosive agent is satisfactorily penetrated between the core wires and filled.
  • the viscosity of the anticorrosive agent of the present invention is a value measured at 25 ° C. with an E-type viscometer.
  • the type of resin of the anticorrosive agent 80 is not particularly limited as long as it is a material capable of forming an anticorrosive coating film, but it is preferable to use a curable resin composition containing a curable resin that can be cured at room temperature. .
  • the curable resin is preferably one capable of applying the anticorrosive agent at room temperature.
  • the anticorrosive is preferably room temperature curable. If the anticorrosive agent can be applied at room temperature, a heating device or the like is unnecessary as compared with a hot-melt resin.
  • the curing means for the curable resin is not particularly limited, and various curing means such as a photo-curing type such as ultraviolet curing, a heat curing type, a moisture curing type, and an anaerobic curing type can be used.
  • a photo-curing type such as ultraviolet curing, a heat curing type, a moisture curing type, and an anaerobic curing type
  • an acrylic resin, an epoxy resin, a silicone resin, or the like can be used as the anticorrosive agent 80.
  • these various curable resins are used.
  • test results are shown in Table 1.
  • the test method and evaluation method are as follows.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Insulated Conductors (AREA)

Abstract

Provided are: a terminal-equipped electric wire which is capable of minimizing the corrosion of the electrical contact sections of a terminal fitting and an electric wire conductor, and also makes it possible to easily apply a coating of an anti-corrosive agent and to definitively coat only the necessary area with the anti-corrosive agent; and a method for producing the same. When producing a terminal-equipped electric wire (110) provided with an anti-corrosive-agent coated section obtained by applying a coat of an anti-corrosive agent (80) to a connection section where a terminal (130) is connected to an end section of a covered electric wire (120) comprising a conductor (121) covered by an insulating body (124), the coating with the anti-corrosive agent (80) occurs by contacting the anti-corrosive agent (80) to the connection section starting from the bottom of the connection section and soaking the connection section in the anti-corrosive agent (80), and the viscosity of the anti-corrosive agent (80) at room temperature is within the range of 1,000-30,000 mPa·s.

Description

端子付き電線及びその製造方法Electric wire with terminal and manufacturing method thereof
　本発明は、端子付き電線及びその製造方法に関する。 The present invention relates to an electric wire with a terminal and a manufacturing method thereof.
　従来、自動車等の車両の軽量化により燃費効率を向上させようとする動きが加速しており、ワイヤーハーネスを構成する電線材料についても軽量化が求められている。そのため、電線導体にアルミニウムを用いることが検討されるようになってきている。 2. Description of the Related Art Conventionally, the movement to improve fuel efficiency has been accelerated by reducing the weight of vehicles such as automobiles, and there has been a demand for reducing the weight of electric wire materials constituting the wire harness. Therefore, the use of aluminum for the wire conductor has been studied.
　しかしながら、端子金具は、電気特性に優れた銅又は銅合金が一般に用いられる。それ故、アルミ電線‐銅端子金具の組み合わせ等で使用されることが多くなる。電線導体と端子金具との材質が異なると、その電気接続部で異種金属接触による腐食が発生する。この種の腐食は、電線導体と端子金具との材質が同じである場合よりも起こりやすい。そのため、電気接続部を確実に防食できる防食剤が必要となる。 However, copper or a copper alloy having excellent electrical characteristics is generally used for the terminal fitting. Therefore, it is often used in a combination of an aluminum electric wire and a copper terminal fitting. If the material of the wire conductor and the terminal fitting are different, corrosion due to contact with different metals occurs at the electrical connection portion. This type of corrosion is more likely to occur than when the wire conductor and the terminal fitting are the same material. Therefore, an anticorrosive agent that can reliably prevent the electrical connection portion is required.
　防食剤は、必要な部分にのみ存在していることが望ましい。例えば、端子どうしの接続部等に防食剤がはみ出して塗布されてしまうと、端子の接続不良等を引き起すことになる。上記電気接続部における腐食を防止するため、例えば、特許文献１には、粘度の異なる２種以上の樹脂を使用し、電線導体に接続された電線先端部を封止する技術が公知である（特許文献１参照）。 It is desirable that the anticorrosive is present only in the necessary part. For example, if the anticorrosive agent protrudes and is applied to the connection part between the terminals, the connection failure of the terminal is caused. In order to prevent corrosion in the electrical connection part, for example, Patent Document 1 discloses a technique of using two or more kinds of resins having different viscosities and sealing an end part of an electric wire connected to an electric wire conductor ( Patent Document 1).
　上記特許文献１に記載の手段は、具体的には、硬化前の粘度の低い第１の紫外線硬化樹脂を端子接続部に塗布し、接続部の隙間に樹脂を浸透させ、その後硬化前の粘度の高い第２の紫外線硬化樹脂を塗布して十分な膜厚の防食剤を形成するというものである。 Specifically, the means described in Patent Document 1 applies a first UV curable resin having a low viscosity before curing to the terminal connection part, allows the resin to penetrate into the gap between the connection parts, and then the viscosity before curing. The second UV curable resin having a high thickness is applied to form an anticorrosive having a sufficient film thickness.
　しかしながら、上記の手段のように、２種類の粘度の異なる樹脂を用いて、２段階で樹脂を塗布して防食処理を行うということは、２種類の樹脂を準備したり、工程が増える等、作業が煩雑になってしまうという問題があった。 However, like the above means, using two types of resins with different viscosities and applying anti-corrosion treatment in two stages means preparing two types of resins, increasing the number of processes, etc. There was a problem that the work would be complicated.
上記の問題に対処するために例えば、特許文献２に記載されている塗布方法が提案されている。 In order to deal with the above problem, for example, a coating method described in Patent Document 2 has been proposed.
特開２０１１－２３８５００号公報JP 2011-238500 A 特許第５２９９２１０号公報Japanese Patent No. 5299210
　特許文献２に記載の塗布方法は、重力に逆らって下方から上方へ防食剤を噴流させて、所定の部分に防食剤を塗布する方法である。通常の滴下により上方から下方に重力で防食剤を塗布する方法では、塗布量を調節することで、膜厚を関することができる。しかしながら、上記の噴流での塗布は、塗布量の管理が難しいという問題があった。 The coating method described in Patent Document 2 is a method in which an anticorrosive agent is jetted from below to above against gravity to apply the anticorrosive agent to a predetermined portion. In the method of applying the anticorrosive agent by gravity from the upper side to the lower side by ordinary dropping, the film thickness can be related by adjusting the application amount. However, the application with the above jet flow has a problem that it is difficult to control the application amount.
　本発明の目的は、上記従来技術の問題点を解決しようとするものであり、防食剤を噴流により塗布する際の塗布量を管理することが可能であり、確実に必要な部分に防食剤を塗布して、高い防食性能を発揮することが可能である、端子付き電線及びその製造方法を提供することにある。 The object of the present invention is to solve the above-mentioned problems of the prior art, and it is possible to control the coating amount when the anticorrosive agent is applied by a jet, and to reliably apply the anticorrosive agent to the necessary part. An object of the present invention is to provide a terminal-attached electric wire that can be applied and exhibit high anticorrosion performance, and a method for manufacturing the electric wire.
　上記課題を解決するために、本発明の端子付き電線は、
　導体が絶縁体で被覆された被覆電線の端部に端子が接続された接続部に防食剤が塗布された防食剤塗布部を備える端子付き電線であって、
　防食剤の塗布が、前記接続部の下方から前記接続部に防食剤を接触させ、前記接続部に防食剤を浸透させることにより行われたものであり、
　前記防食剤の常温における粘度が、１０００～３００００ｍPａ・ｓの範囲内であることを特徴とするものである。 In order to solve the above problems, the electric wire with terminal of the present invention is
An electric wire with a terminal provided with an anticorrosive agent-applied portion in which an anticorrosive agent is applied to a connection portion in which a terminal is connected to an end portion of a covered electric wire whose conductor is covered with an insulator,
Application of the anticorrosive agent is performed by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion,
The anticorrosive has a viscosity at room temperature of 1000 to 30000 mPa · s.
　本発明の端子付き電線において、前記被覆電線の導体がアルミニウム系金属であり、前記端子金具が銅系金属であり、上記接続部が異種金属接続部であることが好ましい。 In the electric wire with terminal of the present invention, it is preferable that the conductor of the covered electric wire is an aluminum metal, the terminal metal fitting is a copper metal, and the connecting portion is a dissimilar metal connecting portion.
　本発明の端子付き電線の製造方法は、
　導体が絶縁体で被覆された被覆電線の端部に端子が接続された接続部に防食剤が塗布された防食剤塗布部を備える端子付き電線の製造方法であって、
　防食剤の塗布が、前記接続部の下方から前記接続部に防食剤を接触させ、前記接続部に防食剤を浸透させることにより行われたものであり、
　前記防食剤の常温における粘度が、１０００～３００００ｍPａ・ｓの範囲内であることを特徴とするものである。 The manufacturing method of the electric wire with terminal of the present invention is as follows.
A method for producing a terminal-attached electric wire comprising an anticorrosive agent-applied part in which an anticorrosive agent is applied to a connection part in which a terminal is connected to an end part of a covered electric wire whose conductor is covered with an insulator,
Application of the anticorrosive agent is performed by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion,
The anticorrosive has a viscosity at room temperature of 1000 to 30000 mPa · s.
　本発明の端子付き電線の製造方法において、前記防食剤が硬化性樹脂を用いたものであり、防食剤の塗布を常温で行うことが好ましい。 In the method for manufacturing an electric wire with a terminal of the present invention, it is preferable that the anticorrosive agent uses a curable resin, and the anticorrosive agent is applied at room temperature.
　本発明は、防食剤の塗布が、前記接続部の下方から前記接続部に防食剤を接触させ、前記接続部に防食剤を浸透させることにより行われたものであるから、防食剤の塗布が容易であり、確実に必要な部分のみに防食剤を塗布することが可能である。その場合、前記防食剤の粘度を１０００～３００００ｍPａ・ｓの範囲内としたことにより、防食剤を必要な部分に十分に浸透させることが可能であり、不要な部分に防食剤が付着したり、必要な部分に防食剤が塗布されないという不具合等を防止することが可能である。その結果、端子付き電線の電線導体と端子金具の電気接触部の腐食を良好に抑制することができる。また本発明によれば、前記端子付き電線を容易に製造することが可能である。 In the present invention, since the anticorrosive agent is applied by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion, the anticorrosive agent is applied. It is easy, and it is possible to reliably apply the anticorrosive agent only to the necessary part. In that case, by setting the viscosity of the anticorrosive in the range of 1000 to 30000 mPa · s, it is possible to sufficiently penetrate the anticorrosive into the necessary part, and the anticorrosive adheres to the unnecessary part, It is possible to prevent a problem that the anticorrosive is not applied to a necessary portion. As a result, corrosion of the electric contact portion of the electric wire conductor of the electric wire with terminal and the terminal fitting can be satisfactorily suppressed. Moreover, according to this invention, it is possible to manufacture the said electric wire with a terminal easily.
図１は本発明の端子付き電線の一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of a terminal-attached electric wire according to the present invention. 図２は図１のＡ－Ａ線断面図である。2 is a cross-sectional view taken along line AA in FIG. 図３は図１のＢ－Ｂ線断面図である。3 is a cross-sectional view taken along line BB in FIG. 図４は端子付き電線に防食剤を塗布する方法を示す説明図である。FIG. 4 is an explanatory view showing a method of applying an anticorrosive to the electric wire with terminal.
　以下、図面を用いて本発明の実施例を詳細に説明する。図１は本発明の端子付き電線の一実施例を示す正面図である。図１に示すように、端子付き電線１１０は、被覆電線１２０に端子１３０が圧着されて形成され、被覆電線１２０の芯線１２１と端子１３０とが異種金属で構成されている。以下、端子付き電線１１０の一例を示す。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing an embodiment of a terminal-attached electric wire according to the present invention. As shown in FIG. 1, the terminal-attached electric wire 110 is formed by crimping a terminal 130 on a covered electric wire 120, and the core wire 121 and the terminal 130 of the covered electric wire 120 are made of different metals. Hereinafter, an example of the electric wire 110 with a terminal is shown.
　被覆電線１２０は、導体としてアルミニウム（或いはアルミニウム合金）線で構成された芯線１２１が、その外周を樹脂等の絶縁体で形成された被覆材１２４により被覆されて構成されている。ここでは、芯線１２１は、複数のアルミニウム（アルミニウム合金）線を撚って構成されている。そして、被覆電線１２０の端部は、被覆材１２４が皮剥ぎされ、芯線１２１が露出するように加工されている。以下、芯線１２１のうち被覆材１２４が皮剥ぎされて露出された部分を、芯線端部ということもある。 The covered electric wire 120 is formed by covering a core wire 121 made of an aluminum (or aluminum alloy) wire as a conductor with a covering material 124 formed of an insulator such as a resin. Here, the core wire 121 is formed by twisting a plurality of aluminum (aluminum alloy) wires. And the edge part of the covered electric wire 120 is processed so that the coating | coated material 124 may be peeled off and the core wire 121 may be exposed. Hereinafter, the portion of the core wire 121 where the coating material 124 is peeled off and exposed is sometimes referred to as a core wire end portion.
　被覆電線１２０は、自動車用ワイヤーハーネスに用いられる絶縁電線を用いることができる。被覆電線１２０の芯線１２１は、複数の素線が撚り合わされてなる撚線から構成することができる。撚線は、１種の金属素線より構成されていても良いし、２種以上の金属素線より構成されていても良い。また、撚線は、金属素線以外に、有機繊維よりなる素線等を含んでいても良い。なお、１種の金属素線より構成されるとは、撚線を構成する全ての金属素線が同じ金属材料よりなることをいい、２種以上の金属素線より構成されるとは、撚線中に互いに異なる金属材料よりなる金属素線を含んでいることをいう。撚線中には、被覆電線を補強するための補強線（テンションメンバ）等が含まれていても良い。 The insulated wire 120 can be an insulated wire used for an automobile wire harness. The core wire 121 of the covered electric wire 120 can be composed of a stranded wire formed by twisting a plurality of strands. The stranded wire may be composed of one type of metal strand, or may be composed of two or more types of metal strand. Moreover, the twisted wire may contain the strand etc. which consist of organic fibers other than a metal strand. Note that “consisting of one type of metal strand” means that all the metal strands constituting the stranded wire are made of the same metal material, and “consisting of two or more types of metal strands” This means that the wire contains metal wires made of different metal materials. The stranded wire may include a reinforcing wire (tension member) for reinforcing the covered electric wire.
　上記芯線１２１を構成する金属素線の材料としては、アルミニウム合金以外に、銅、銅合金、アルミニウムもしくはこれらの材料に各種メッキが施された材料等を例示することができる。また、補強線としての金属素線の材料としては、銅合金、チタン、タングステン、ステンレス等を例示することができる。また、補強線としての有機繊維としては、ケブラー等を挙げることができる。芯線１２１に用いられる金属素線としては、電線の軽量化等の点からアルミニウム又はアルミニウム合金を用いるのが好ましい。 Examples of the material of the metal wire constituting the core wire 121 include copper, copper alloy, aluminum, or materials obtained by plating these materials in addition to the aluminum alloy. Moreover, as a material of the metal strand as a reinforcement wire, a copper alloy, titanium, tungsten, stainless steel etc. can be illustrated. Examples of the organic fiber as the reinforcing wire include Kevlar. As a metal strand used for the core wire 121, it is preferable to use aluminum or aluminum alloy from the point of weight reduction of an electric wire.
　被覆電線１２０に用いられる被覆材１２４の材料としては、特に限定されず、例えば、ゴム、ポリオレフィン、塩化ビニル樹脂（ＰＶＣ）、熱可塑性エラストマー等が挙げられる。これらは単独で用いても良いし、二種以上を混合して用いても良い。被覆材１２４の材料中には、適宜、各種添加剤が添加されていても良い。添加剤としては、難燃剤、充填剤、着色剤等を挙げることができる。 The material of the covering material 124 used for the covered electric wire 120 is not particularly limited, and examples thereof include rubber, polyolefin, vinyl chloride resin (PVC), and thermoplastic elastomer. These may be used alone or in admixture of two or more. Various additives may be appropriately added to the material of the covering material 124. Examples of the additive include a flame retardant, a filler, a colorant and the like.
　端子１３０は、一方向に長尺に形成され、その長手方向先端側から基端側に向けて順に、端子嵌合部１１２、芯線圧着部１１４及び被覆圧着部１１６を有している。端子１３０の端子嵌合部１１２、芯線圧着部１１４及び被覆圧着部１１６は、それぞれ離間するように形成されている。この端子１３０は、銅板又はすずメッキ銅板等の金属板を打ち抜き、屈曲等して一体形成されている。ここでは、端子１３０がメス端子である場合について説明する。尚、端子１３０はオス端子であってもよい。 The terminal 130 is formed long in one direction, and has a terminal fitting portion 112, a core wire crimping portion 114, and a covering crimping portion 116 in that order from the distal end side to the proximal end side in the longitudinal direction. The terminal fitting portion 112, the core wire crimping portion 114, and the covering crimping portion 116 of the terminal 130 are formed so as to be separated from each other. The terminal 130 is integrally formed by punching a metal plate such as a copper plate or a tin-plated copper plate, bending it, or the like. Here, a case where the terminal 130 is a female terminal will be described. The terminal 130 may be a male terminal.
　端子１３０に用いられる金属板は、例えば、銅板以外に、黄銅、銅合金等の各種銅合金の金属板を用いることができる。またメッキは、すず以外に、ニッケル、金、銀等の各種金属メッキを用いることができる。 The metal plate used for the terminal 130 may be, for example, a metal plate made of various copper alloys such as brass and copper alloy in addition to the copper plate. In addition to tin, various metal platings such as nickel, gold, and silver can be used for plating.
　端子１３０の端子嵌合部１１２には、オス端子（図示せず）が嵌合状に挿入接続される。ここでは、端子１３０の長手方向に沿って貫通する筒状（より具体的には角筒状）に形成されている。また、端子嵌合部１１２内部には、オス端子接触用の接触片１１３が設けられている。 A male terminal (not shown) is inserted and connected to the terminal fitting portion 112 of the terminal 130 in a fitting manner. Here, it is formed in a cylindrical shape (more specifically, a rectangular tube shape) penetrating along the longitudinal direction of the terminal 130. A contact piece 113 for contacting a male terminal is provided inside the terminal fitting portion 112.
　端子１３０の端子嵌合部１１２より基端側部分は、端子嵌合部１１２の一部から端子１３０の長手方向に延びる底部１１８の一部から、芯線圧着部１１４及び被覆圧着部１１６が端子１３０の長手方向に直交する一方側に向けて突出するように形成されている。より具体的には、芯線圧着部１１４及び被覆圧着部１１６が電線１２０に圧着されない状態では、一方側（芯線圧着部１１４及び被覆圧着部１１６の突出側）から電線１２０端部を配設可能なように、前記一方側が開口する断面視略Ｕ字形状に形成されている。 The proximal end portion of the terminal 130 with respect to the terminal fitting portion 112 is such that the core crimping portion 114 and the covering crimping portion 116 are connected to the terminal 130 from a part of the bottom 118 extending from a part of the terminal fitting portion 112 in the longitudinal direction of the terminal 130. It is formed so as to protrude toward one side orthogonal to the longitudinal direction. More specifically, in a state where the core wire crimping portion 114 and the covering crimping portion 116 are not crimped to the electric wire 120, the end of the electric wire 120 can be disposed from one side (the protruding side of the core wire crimping portion 114 and the covering crimping portion 116). Thus, it is formed in the cross-sectional view substantially U shape which the said one side opens.
　そして、端子付き電線１１０は、電線１２０の芯線端部が端子１３０の底部のうち芯線圧着部１１４の対向する２片間に配設されると共に、被覆材１２４が被覆圧着部１１６の対向する２片間に配設され、この状態で、芯線圧着部１１４が芯線端部の長手方向一部の外周を覆うように圧着されると共に、被覆圧着部１１６が被覆材１２４のうち芯線端部側部分に圧着されて構成されている。ここでは、電線１２０の芯線端部のうち中間部分が芯線圧着部１１４と圧着され、先端部分１２２ ａと基端部分１２２ｂとは底部１１８の前記一方側で、端子１３０の長手方向において芯線圧着部１１４の両側から外方に露出された状態となっている。 In the terminal-attached electric wire 110, the end portion of the core 120 of the electric wire 120 is disposed between two facing portions of the core wire crimping portion 114 in the bottom portion of the terminal 130, and the covering material 124 is opposed to the covering crimping portion 116. In this state, the core crimping portion 114 is crimped so as to cover the outer periphery of a part of the core wire end portion in the longitudinal direction, and the covering crimping portion 116 is the core wire end side portion of the covering material 124. It is configured to be crimped to. Here, an intermediate portion of the core wire end portion of the electric wire 120 is crimped to the core wire crimping portion 114, and the distal end portion 122 a and the base end portion 122 b are the one side of the bottom portion 118, and the core wire crimping portion in the longitudinal direction of the terminal 130. 114 is exposed to the outside from both sides.
　尚、図１に示す端子付き電線１１０は、電線１２０の端部の被覆材１２４が皮剥ぎされて露出された芯線端部に対して、端子１３０の芯線圧着部１１４が圧着されている例で説明したが、本発明の端子付き電線はこれに限られるものではない。例えば、端子付き電線は、長手方向中途部で被覆材１２４が皮剥ぎされて芯線が露出された複数の電線に対して、当該露出された芯線同士を接続するように端子が圧着された構成であってもよい。 In addition, the electric wire 110 with a terminal shown in FIG. 1 is an example in which the core wire crimping portion 114 of the terminal 130 is crimped to the core wire end portion exposed by peeling off the covering material 124 at the end portion of the electric wire 120. Although demonstrated, the electric wire with a terminal of the present invention is not restricted to this. For example, the terminal-attached electric wire has a configuration in which the terminal is crimped so as to connect the exposed core wires to the plurality of electric wires in which the covering material 124 is peeled off in the middle in the longitudinal direction and the core wires are exposed. There may be.
　上記のように、ここでは、被覆電線１２０の芯線１２１がアルミニウム（アルミニウム合金）、端子１３０が銅（或いは黄銅等の銅合金、或はこれらのすずメッキ）板で構成されており、両金属間では、端子１３０より芯線の標準電極電位が低い関係にある。これにより、芯線圧着部１１４と芯線端部との接触部に水（電解質水溶液）が付着すると、芯線露出部１２２に腐食（電食）が発生する恐れがある。以下、芯線１２１及び端子１３０が上記関係であることを前提として、芯線露出部１２２に対する防食処理を行う例で説明する。 As described above, here, the core wire 121 of the covered electric wire 120 is made of aluminum (aluminum alloy), and the terminal 130 is made of a copper (or copper alloy such as brass, or a tin plating thereof), and between the two metals. Then, the standard electrode potential of the core wire is lower than that of the terminal 130. Thereby, if water (electrolyte aqueous solution) adheres to the contact portion between the core wire crimping portion 114 and the core wire end portion, the core wire exposed portion 122 may be corroded (electric corrosion). Hereinafter, an example in which anticorrosion treatment is performed on the core wire exposed portion 122 will be described on the assumption that the core wire 121 and the terminal 130 have the above relationship.
　端子付被覆電線１１０は、防食剤８０により芯線露出部１２２の表面が覆われている。防食剤８０は端子付き電線の芯線露出部１２２の隅々まで行きわたると共に、そこに隣接する端子１３０の芯線圧着部及び底部の表面にも付着している。図１～図３は、便宜上、防食剤８０を透視した状態で示している。 The surface of the core wire exposed portion 122 of the coated electric wire with terminal 110 is covered with an anticorrosive agent 80. The anticorrosive agent 80 reaches every corner of the core wire exposed portion 122 of the terminal-attached electric wire, and also adheres to the core wire crimping portion and the bottom surface of the terminal 130 adjacent thereto. 1 to 3 show the anticorrosive agent 80 in a transparent state for convenience.
　図２は図１のＡ－Ａ線断面図であり、芯線露出部１２２ｂの部分を示している。図２に示すように、芯線露出部１２２ｂの部分の防食剤８０は、芯線１２１の全周囲を隙間なく被覆している。図３は図１のＢ－Ｂ線断面図であり、芯線露出部１２２ａの部分を示している。図３に示すように芯線露出部１２２ａの部分の防食剤８０は、芯線１２１の芯線露出部１２２ａ側の周囲を被覆している。芯線露出部１２２は防食剤８０により完全に被覆されていて、外部に露出しないようになっている。 FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and shows a portion of the core wire exposed portion 122b. As shown in FIG. 2, the anticorrosive agent 80 at the core wire exposed portion 122 b covers the entire periphery of the core wire 121 without any gaps. 3 is a cross-sectional view taken along the line BB of FIG. 1, and shows a portion of the core wire exposed portion 122a. As shown in FIG. 3, the anticorrosive agent 80 in the portion of the core wire exposed portion 122 a covers the periphery of the core wire 121 on the core wire exposed portion 122 a side. The core wire exposed portion 122 is completely covered with the anticorrosive agent 80 so that it is not exposed to the outside.
　図１～図３に示す端子付き電線１１０において、防食剤８０は端子１３０と被覆電線１２０の外側周囲の形状に沿って、接続部の上面と側面を所定の厚さで被覆している。端子１３０の底面外側は防食剤７に覆われず、端子１３０の金属が外部に露出した状態になっている。 1 to 3, the anticorrosive agent 80 covers the upper surface and side surfaces of the connection portion with a predetermined thickness along the shape of the outer periphery of the terminal 130 and the covered wire 120. The outside of the bottom surface of the terminal 130 is not covered with the anticorrosive 7 and the metal of the terminal 130 is exposed to the outside.
　被覆電線１２０の端子１３０側の端部は、防食剤８０が芯線１２１の先端から端子１３０の端子嵌合部１１２側に少しはみ出すように被覆している。また端子１３０の被覆電線１２０側の端部は、防食剤８０が被覆材１２４側に少しはみ出すように被覆している。 The end of the coated wire 120 on the terminal 130 side is covered so that the anticorrosive 80 protrudes slightly from the tip of the core wire 121 to the terminal fitting portion 112 side of the terminal 130. Further, the end portion of the terminal 130 on the side of the covered electric wire 120 is covered so that the anticorrosive agent 80 protrudes slightly toward the covering material 124 side.
　芯線１２１と端子１３０の接続部の防食剤８０は、厚みが０．０１～３ｍｍの範囲が好ましい。防食剤８０の厚みが厚くなりすぎると、塗布が困難になる恐れがある。また防食剤８０の厚みが薄くなりすぎると防食性能が不十分となる恐れがある。 The thickness of the anticorrosive agent 80 at the connecting portion between the core wire 121 and the terminal 130 is preferably 0.01 to 3 mm. If the thickness of the anticorrosive agent 80 becomes too thick, application may be difficult. Further, if the thickness of the anticorrosive agent 80 becomes too thin, the anticorrosion performance may be insufficient.
　図４は端子付き電線に防食剤を塗布する方法を示す説明図である。防食剤８０の塗布は、図４に示すように、端子１３０の上下を反転させ、接続部の芯線が露出している芯線露出部１２２が下方を向くように配置した状態で、芯線露出部１２２と対向する下方から、芯線露出部１２２に防食剤を接触させ、芯線露出部１２２に防食剤８０を浸透させることにより行われたものである。端子付き電線１１０に対して、芯線露出部１２２を下方に向ける姿勢で保持された状態で防食剤８０が塗布されている。 FIG. 4 is an explanatory view showing a method of applying an anticorrosive to the electric wire with terminal. As shown in FIG. 4, the anticorrosive agent 80 is applied in a state where the terminal 130 is turned upside down and the core wire exposed portion 122 where the core wire of the connecting portion is exposed is directed downward. The anticorrosive agent is brought into contact with the core wire exposed portion 122 and the anticorrosive agent 80 is infiltrated into the core wire exposed portion 122 from below. The anticorrosive agent 80 is applied to the terminal-attached electric wire 110 while being held in a posture in which the core wire exposed portion 122 faces downward.
　具体的な接続部に対する防食剤の塗布方法としては、特許第５２９９２１０号公報等に記載の方法を用いることができる。以下、塗布方法の一例について説明する。図４に示すように、芯線露出部１２２と端子１３０との接触部近傍に防食剤８０の組成物（以下、防食剤８０ということもある）を塗布する装置を用いる。図４に示す装置は、噴流部３０を備え、該噴流部から防食剤を噴流させることが可能に形成されている。 As a specific method for applying the anticorrosive to the connection portion, the method described in Japanese Patent No. 5299210 can be used. Hereinafter, an example of the coating method will be described. As shown in FIG. 4, a device for applying a composition of the anticorrosive agent 80 (hereinafter sometimes referred to as the anticorrosive agent 80) in the vicinity of the contact portion between the core wire exposed portion 122 and the terminal 130 is used. The apparatus shown in FIG. 4 includes a jet part 30 and is formed so that an anticorrosive can be jetted from the jet part.
　噴流部３０は、上方が開口している開口部を有する二つのノズル３０ａ、３０ｂから構成されている。ノズル３０ａ、３０ｂは、上方に向けて開口し、防食剤８０を上方に向けて案内可能に構成されている。ノズル３０ａは、端子付き電線１１０の芯線露出部１２２ａに対応して配設されている。ノズル３０ｂは、端子付き電線１１０の被覆圧着部１１６側の芯線露出部１２２ｂに対応して配設されている。 The jet part 30 is composed of two nozzles 30a and 30b each having an opening that opens upward. The nozzles 30a and 30b are configured to open upward and be able to guide the anticorrosive agent 80 upward. The nozzle 30a is disposed corresponding to the core wire exposed portion 122a of the terminal-attached electric wire 110. The nozzle 30b is disposed corresponding to the core wire exposed portion 122b on the coated crimping portion 116 side of the electric wire 110 with terminal.
　噴流部３０は、噴流させた防食剤８０に端子付き電線の芯線露出部１２２を浸すことにより、端子付き電線１１０の接続部に防食剤８０が接触し、芯線露出部に防食剤の組成物が塗布される。防食剤８０を塗布する際、芯線露出部１２２と、該芯線露出部１２２に隣接する端子１３０の芯線圧着部１１４及び底部１１８にも防食剤８０が塗布されるようにすることが好ましい。 The jet part 30 immerses the core wire exposed part 122 of the terminal-attached electric wire in the jetted anti-corrosive agent 80, whereby the anticorrosive agent 80 comes into contact with the connection part of the terminal-attached electric wire 110, and the composition of the anticorrosive agent is applied to the core wire exposed part. Applied. When the anticorrosive agent 80 is applied, the anticorrosive agent 80 is preferably applied to the core wire exposed portion 122 and the core wire crimping portion 114 and the bottom portion 118 of the terminal 130 adjacent to the core wire exposed portion 122.
　噴流部３０は、防食剤槽等に貯留された防食剤８０を、噴流部３０から端子付き電線１１０の芯線露出部１２２ａ、１２２ｂに向けて噴流可能とするための噴流機構部等を備えている。 The jet part 30 includes a jet mechanism part or the like for allowing the anticorrosive agent 80 stored in the anticorrosive tank or the like to jet from the jet part 30 toward the core wire exposed parts 122a and 122b of the terminal-attached electric wire 110. .
　端子付き電線１１０に対して防食剤８０を塗布する方法は、まず、端子付き電線１１０を保持部材等に取付け保持し、防食剤８０を噴流する。次に、端子付き電線１１０の芯線露出部１２２ａ、１２２ｂを、噴流部３０ａ、３０ｂと対向する位置に移動させる。端子付き電線１１０は噴流部３０から離間した位置に維持された状態から、噴流部３０に近接する向きに下降移動させる。そして、端子付き電線１１０の芯線露出部１２２ａ、１２２ｂが噴流部３０ａ、３０ｂから噴流されている防食剤８０に浸る位置で移動を停止し、この位置で端子付き電線１１０を保持した状態で、例えば１．５～２秒間程度浸して、防食剤を浸透させて、芯線露出部１２２ａ、１２２ｂに防食剤８０を塗布する。 The method of applying the anticorrosive agent 80 to the terminal-attached electric wire 110 is as follows. First, the terminal-attached electric wire 110 is attached and held on a holding member or the like, and the anticorrosive agent 80 is jetted. Next, the core wire exposed portions 122a and 122b of the terminal-attached electric wire 110 are moved to positions facing the jet portions 30a and 30b. The terminal-attached electric wire 110 is moved downward in a direction approaching the jet part 30 from a state where it is maintained at a position separated from the jet part 30. And in the state where the core wire exposed portions 122a and 122b of the terminal-attached electric wire 110 are immersed in the anticorrosive agent 80 jetted from the jet portions 30a and 30b, the movement is stopped, and the terminal-attached electric wire 110 is held at this position. Immerse for about 1.5 to 2 seconds to infiltrate the anticorrosive agent, and apply the anticorrosive agent 80 to the core wire exposed portions 122a and 122b.
　この状態で、端子付き電線１１０は、噴流部３０ａの傾斜形状の先端部が、端子嵌合部１１２と芯線露出部１２２ａとの間の空間に配設される位置に配設されている。そして、ノズル３０ａから噴流される防食剤８０は、先端側部分の傾斜形状により、主として斜め上方に向けて芯線露出部１２２ａに浴びせられる。また、ノズル３０ｂから噴流される防食剤８０は、上方に向けて芯線露出部１２２ｂに浴びせられる。さらに、ノズル３０ａ、３０ｂから噴流される防食剤８０は、ノズル３０ａ、３０ｂ双方の間で結合して流れ、端子１３０の芯線圧着部１１４の露出されている表面の一部または全体に対しても浴びせられて塗布される。 In this state, the terminal-attached electric wire 110 is disposed at a position where the inclined tip portion of the jet portion 30a is disposed in the space between the terminal fitting portion 112 and the core wire exposed portion 122a. And the anticorrosive 80 jetted from the nozzle 30a is bathed in the core line exposed part 122a mainly toward diagonally upward by the inclination shape of the front end side part. Moreover, the anticorrosive agent 80 jetted from the nozzle 30b is poured on the core wire exposed part 122b toward the upper side. Further, the anticorrosive agent 80 jetted from the nozzles 30a and 30b flows in a coupled manner between both the nozzles 30a and 30b, and is also applied to part or all of the exposed surface of the core wire crimping portion 114 of the terminal 130. It is bathed and applied.
　端子付き電線１１０を防食剤８０に浸した後、端子付き電線を上昇させ、噴流部３０から離間する向きに移動させる。端子付き電線１１０を、徐々に噴流部３０から離間移動させていくと、重力及び表面張力の作用により、ノズル３０ｂから噴流される防食剤８０と端子付き電線１１０に付着した防食剤８０が分離し、ノズル３０ａから噴流される防食剤８０と端子付き電線１１０に付着した防食剤８０が分離する。 After dipping the electric wire with terminal 110 in the anticorrosive agent 80, the electric wire with terminal is raised and moved away from the jet part 30. When the electric wire with terminal 110 is gradually moved away from the jet part 30, the anticorrosive agent 80 jetted from the nozzle 30b and the anticorrosive agent 80 attached to the electric wire with terminal 110 are separated by the action of gravity and surface tension. The anticorrosive 80 jetted from the nozzle 30a and the anticorrosive 80 adhering to the terminal-attached electric wire 110 are separated.
　一般に、端子付き電線１１０の芯線露出部１２２を上方に向けた姿勢で（図１参照）、芯線露出部１２２ａに対して溶融した防食剤８０を塗布する場合、芯線露出部１２２ａに塗布された防食剤８０が端子１３０の底部１１８をつたって端子嵌合部１１２側に流れる恐れがある。これに対して、上記のように、端子付き電線１１０の芯線露出部１２２を下方に向けた姿勢で、芯線露出部１２２ａに対して噴流される防食剤８０を塗布することにより、芯線露出部１２２に塗布された防食剤８０あ、芯線露出部１２２のうち底部１１８とは反対側部分に集まり易く、端子嵌合部１１２側に塗布した防食剤８０が流れ込んで付着することを抑制することができる。 In general, when the melted anticorrosive agent 80 is applied to the core wire exposed portion 122a with the core wire exposed portion 122 of the electric wire with terminal 110 facing upward (see FIG. 1), the anticorrosion applied to the core wire exposed portion 122a. There is a risk that the agent 80 flows to the terminal fitting part 112 side through the bottom part 118 of the terminal 130. On the other hand, as described above, the core wire exposed portion 122 is applied by applying the anticorrosive 80 jetted to the core wire exposed portion 122a in a posture in which the core wire exposed portion 122 of the electric wire 110 with terminal is directed downward. The anticorrosive agent 80 applied to the inner surface of the core exposed portion 122 is likely to gather on the opposite side of the bottom portion 118, and the anticorrosive agent 80 applied to the terminal fitting portion 112 side can be prevented from flowing in and adhering thereto. .
　上記のように、噴流により防食剤を塗布する場合、滴下等の一般的な塗布方法と比較して、同様の手段で塗布量を管理することはできない。そこで本発明は上記のように、粘度範囲を規定することにより、塗布量を管理することにしている。また、膜厚を調節するには、例えば噴流装置から、防食剤に接触させている端子付き電線を上昇させる速度を調節することで、膜厚を調節することができる。 As described above, when the anticorrosive agent is applied by a jet, the application amount cannot be controlled by the same means as compared with a general application method such as dripping. Therefore, in the present invention, as described above, the coating amount is managed by defining the viscosity range. Moreover, in order to adjust a film thickness, a film thickness can be adjusted by adjusting the speed which raises the electric wire with a terminal made to contact the anticorrosive from a jet apparatus, for example.
　本発明は、常温における防食剤の硬化前の塗布時の粘度を１０００～３００００ｍPａ・ｓの範囲内とした点に特徴がある。防食剤の粘度が１０００ｍPａ・ｓ未満の場合、粘度が低くなりすぎて、端子への濡れ広がりにより端子先端部（端子嵌合部１１２側）への流れ込みが発生し易くなる。また防食剤の粘度が３００００ｍPａ・ｓを超えると粘度が高くなりすぎて、膜厚が厚くなりすぎて、コネクタハウジングに挿入する際に干渉する恐れがある。本願発明は、防食剤の粘度が１０００～３００００ｍPａ・ｓの範囲内であるから、膜厚を確保することが可能であり耐外傷性に優れると共に、コネクタハウジングに挿入する際に干渉せずに挿入することが可能である。 The present invention is characterized in that the viscosity at the time of application of the anticorrosive before curing at room temperature is in the range of 1000 to 30000 mPa · s. When the viscosity of the anticorrosive is less than 1000 mPa · s, the viscosity is too low, and the wetting of the terminal tends to cause a flow into the terminal tip (terminal fitting portion 112 side). On the other hand, when the viscosity of the anticorrosive exceeds 30000 mPa · s, the viscosity becomes too high and the film thickness becomes too thick, which may cause interference when inserted into the connector housing. In the present invention, since the viscosity of the anticorrosive agent is in the range of 1000 to 30000 mPa · s, it is possible to secure a film thickness, and it is excellent in damage resistance and inserted without interfering when inserted into the connector housing. Is possible.
　また浸透性という観点からは、防食剤の粘度が高くなると浸透性が低下する恐れがある。防食剤を芯線の間等に良好に浸透させて充填させるという点からは、防食剤の粘度の上限は、２００００ｍPａ・ｓ以下であるのが好ましく、更に好ましくは、６０００ｍPａ・ｓ以下である。本発明の防食剤の粘度は、E型粘度計により、２５℃で測定した値である。 Also, from the viewpoint of permeability, there is a risk that the permeability will decrease as the viscosity of the anticorrosive increases. The upper limit of the viscosity of the anticorrosive agent is preferably 20000 mPa · s or less, and more preferably 6000 mPa · s or less, from the viewpoint that the anticorrosive agent is satisfactorily penetrated between the core wires and filled. The viscosity of the anticorrosive agent of the present invention is a value measured at 25 ° C. with an E-type viscometer.
　防食剤８０の樹脂の種類等は、防食塗膜を形成可能な材料であればよく特に限定されないが、常温で硬化が可能である硬化性樹脂を含む硬化性樹脂組成物を用いることがが好ましい。硬化性樹脂は、防食剤の塗布を常温で行うことが可能なものが好ましい。また防食剤は常温硬化性であるのが好ましい。防食剤の塗布を常温で行うことができれば、ホットメルト型の樹脂と比較して、加熱装置等が不要である。 The type of resin of the anticorrosive agent 80 is not particularly limited as long as it is a material capable of forming an anticorrosive coating film, but it is preferable to use a curable resin composition containing a curable resin that can be cured at room temperature. . The curable resin is preferably one capable of applying the anticorrosive agent at room temperature. The anticorrosive is preferably room temperature curable. If the anticorrosive agent can be applied at room temperature, a heating device or the like is unnecessary as compared with a hot-melt resin.
　硬化性樹脂の硬化手段は、特に限定されず、紫外線硬化等の光硬化型、加熱硬化型、湿気硬化型、嫌気性硬化型等の、各種の硬化手段を用いることが可能である。 The curing means for the curable resin is not particularly limited, and various curing means such as a photo-curing type such as ultraviolet curing, a heat curing type, a moisture curing type, and an anaerobic curing type can be used.
　防食剤８０は、例えば、アクリル系樹脂、エポキシ系樹脂、シリコーン系樹脂等を用いることができる。これらの各種硬化型樹脂が用いられる。 As the anticorrosive agent 80, for example, an acrylic resin, an epoxy resin, a silicone resin, or the like can be used. These various curable resins are used.
　端子付き電線１１０を製造するには、端子１３０と被覆電線１２０を準備する。被覆電線１２０は、端末の被覆材１２４を皮剥ぎして芯線１２１を所定の長さだけ露出させる。次いで被覆電線１２０の端末に、端子１３０を加締めて芯線圧着部１１４、被覆圧着部を圧着し、芯線１２１と端子１３０を接続する。次いで、導体（芯線１２１）と端子１３０と接続部の芯線露出部１２２に防食剤８０の組成物を塗布し、所定の条件で防食剤８０を硬化せしめることで、端子付き電線１１０が得られる。 In order to manufacture the electric wire 110 with a terminal, the terminal 130 and the covered electric wire 120 are prepared. The covered electric wire 120 peels off the covering material 124 of the terminal to expose the core wire 121 by a predetermined length. Next, the terminal 130 is crimped to the end of the covered electric wire 120 to crimp the core wire crimping portion 114 and the coated crimping portion, and the core wire 121 and the terminal 130 are connected. Next, the composition of the anticorrosive agent 80 is applied to the conductor (core wire 121), the terminal 130, and the core wire exposed portion 122 of the connecting portion, and the anticorrosive agent 80 is cured under predetermined conditions, whereby the electric wire 110 with terminals is obtained.
　芯線露出部１２２に防食剤８０を塗布する方法は、上記したように、接続部の下方から防食剤を接触させ、接続部に防食剤を浸透させることにより行う方法が用いられる。防食剤８０を塗布する際、防食剤の組成物を加熱、冷却等により温度調節してもよいが、前記したように、常温で行うことが好ましい。また防食剤８０の硬化には、例えば紫外線照射装置や加熱装置等の硬化装置を用いることができる。 As described above, the method of applying the anticorrosive agent 80 to the core wire exposed portion 122 is performed by bringing the anticorrosive agent into contact with the connecting portion from below and allowing the anticorrosive agent to penetrate into the connecting portion. When applying the anticorrosive agent 80, the composition of the anticorrosive agent may be adjusted in temperature by heating, cooling, or the like, but as described above, it is preferably performed at room temperature. For curing the anticorrosive agent 80, for example, a curing device such as an ultraviolet irradiation device or a heating device can be used.
　上記端子付き電線１１０は、単独或いは複数本の被覆電線を束ねて結束して、ワイヤーハーネスとして用いることが可能である。 The terminal-attached electric wire 110 can be used as a wire harness by bundling a single or a plurality of covered electric wires.
　以下、本発明の、実施例、比較例を示す。
　実施例１～６、比較例１、２は、紫外線硬化性のアクリル系樹脂を含む防食剤を用いた。表１に示すように、実施例１～６では増粘剤としてヒュームドシリカ（日本アエロジル社製、商品名「アエロジル」）の添加量を変化させ、比較例１、２では粘度を下げるためラウリルアクリレート（大阪有機化学株式会社製）を添加することにより粘度を調製した。また、表１に使用した防食剤の粘度を示す。また、アクリル系樹脂の詳細、硬化条件等は下記の通りである。 Examples of the present invention and comparative examples are shown below.
In Examples 1 to 6 and Comparative Examples 1 and 2, a corrosion inhibitor containing an ultraviolet curable acrylic resin was used. As shown in Table 1, in Examples 1 to 6, the amount of fumed silica (manufactured by Nippon Aerosil Co., Ltd., trade name “Aerosil”) was changed as a thickener, and in Comparative Examples 1 and 2, lauryl was used to lower the viscosity. The viscosity was adjusted by adding acrylate (Osaka Organic Chemical Co., Ltd.). Table 1 shows the viscosity of the anticorrosive used. Details of the acrylic resin, curing conditions, etc. are as follows.
・紫外線硬化性のアクリル系樹脂：スリーボンド製　ＴＢ３０６２Ｅ
・アクリル系樹脂の硬化条件：ＵＶ５００ｍＷ/ｃｍ２で１０秒間照射 UV curable acrylic resin: Three Bond TB3062E
-Curing conditions for acrylic resin: Irradiation with UV 500 mW / cm 2 for 10 seconds
　上記の表１に示す防食剤を用い、特許第５２９９１０号に記載の噴流装置を用いて、図４に示すように、アルミニウムの芯線を用いた被覆電線の端部にすずメッキ銅板製の端子が接続された接続部に対し、噴流部３０から防食剤８０を噴流させ、防食剤を６０秒間接触させて、接続部に防食剤を浸透させた後、防食剤を硬化させて試験体を作成した。 Using the anticorrosive shown in Table 1 above, using the jet device described in Japanese Patent No. 5299910, as shown in FIG. 4, a terminal made of a tin-plated copper plate is attached to the end of the covered electric wire using an aluminum core wire. The anticorrosive agent 80 was jetted from the jet part 30 to the connected connection part, the anticorrosive agent was brought into contact with the anticorrosive agent for 60 seconds, the anticorrosive agent was infiltrated into the connection part, and then the anticorrosive agent was cured to prepare a test specimen. .
　作製した試験体について、流れ込み、耐外傷性、ハウジングへの干渉、浸透性について評価した。試験の結果を表１に示す。上記試験方法と評価方法は下記の通りである。 The produced specimens were evaluated for inflow, trauma resistance, interference with the housing, and permeability. The test results are shown in Table 1. The test method and evaluation method are as follows.
〔流れ込み〕
　流れ込みの評価は、端子に防食剤を塗布した際に、端子嵌合部１１２へ流れ込んだ場合を不良（×）とし、流れ込む前に硬化することができた場合を良好（○）とした。 [Flow]
In the evaluation of the inflow, when the anticorrosive agent was applied to the terminal, the case where it flowed into the terminal fitting portion 112 was regarded as defective (x), and the case where it could be cured before flowing was evaluated as good (◯).
〔耐外傷性〕
　耐外傷製の評価は、すずメッキ銅板の平板に上記と同じ設備で塗布し、ＪＩＳＫ５６００－５－５に準拠して、ひっかき試験を実施した。試験はアルミニウム板に０．５ｍｍ厚の接着剤を塗布した試験片を使用し、ひっかき速度を３０ｍｍ／ｓ、荷重を１ｇとして試験を実施した。 [Trauma resistance]
For evaluation of anti-scratch products, the same equipment as described above was applied to a flat plate of a tin-plated copper plate, and a scratch test was performed in accordance with JISK5600-5-5. The test was performed using a test piece obtained by applying an adhesive having a thickness of 0.5 mm to an aluminum plate, a scratching speed of 30 mm / s, and a load of 1 g.
〔ハウジングへの干渉〕
　ハウジングへの干渉は、端子に防食剤を塗布後、挿抜を行い、防食剤が端子の壁面に触れない場合を良好（○）とし、壁面に触れる場合を不良（×）とした。 [Interference with housing]
Interference with the housing was determined as good (◯) when the anticorrosive did not touch the wall surface of the terminal after application of the anticorrosive agent to the terminal, and poor (×) when the anticorrosive did not touch the wall surface of the terminal.
〔浸透性〕
　浸透性は、防食剤が底部１１８まで浸透していた場合を良好（○）とし、防食剤が底部１１８まで浸透しているが一部隙間があるものをやや不良（△）とし、防食剤が底部１１８まで浸透していない場合は不良（×）とした。 [Penetration]
Permeability is good (◯) when the anticorrosive has penetrated to the bottom 118, and is slightly poor (△) if the anticorrosive penetrates to the bottom 118 but has some gaps. When it did not permeate to the bottom part 118, it was set as bad (x).
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１に示すように、実施例１～６は、いずれも粘度が１０００～３００００ｍPａ・ｓの範囲内であるから、流れ込み、耐外傷性、ハウジングへの干渉が全て良好な結果が得られた。これに対し、比較例１、２は、粘度が１０００ｍPａ・ｓ未満であるから、流れ込み、耐外傷性が不良であった。 As shown in Table 1, since all of Examples 1 to 6 have a viscosity in the range of 1000 to 30000 mPa · s, good results were obtained in all of inflow, damage resistance, and interference with the housing. On the other hand, Comparative Examples 1 and 2 had a viscosity of less than 1000 mPa · s, and therefore flowed in and had poor damage resistance.
　また、防食剤の粘度が高くなると、浸透性が低下するが、実施例１～３に示すように、粘度が６０００ｍPａ・ｓ以下であれば浸透性を良好に維持できることが判る。 In addition, as the viscosity of the anticorrosive increases, the permeability decreases. However, as shown in Examples 1 to 3, it can be seen that if the viscosity is 6000 mPa · s or less, the permeability can be maintained well.
　以上、本発明の実施の形態について詳細に説明したが、本発明は上記実施の形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の改変が可能である。

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

Claims (4)

  1. 　導体が絶縁体で被覆された被覆電線の端部に端子が接続された接続部に防食剤が塗布された防食剤塗布部を備える端子付き電線の製造方法であって、
    　防食剤の塗布が、前記接続部の下方から前記接続部に防食剤を接触させ、前記接続部に防食剤を浸透させることにより行われたものであり、
    　前記防食剤の常温における粘度が、１０００～３００００ｍPａ・ｓの範囲内であることを特徴とする端子付き電線の製造方法。     A method for producing a terminal-attached electric wire comprising an anticorrosive agent-applied part in which an anticorrosive agent is applied to a connection part in which a terminal is connected to an end part of a covered electric wire whose conductor is covered with an insulator,
    Application of the anticorrosive agent is performed by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion,
    A method for producing a terminal-attached electric wire, wherein the anticorrosive has a viscosity at room temperature of 1000 to 30000 mPa · s.
  2. 　前記防食剤が硬化性樹脂を用いたものであり、防食剤の塗布を常温で行うことを特徴とする請求項１に記載の端子付き電線の製造方法。 The method for producing a terminal-attached electric wire according to claim 1, wherein the anticorrosive agent uses a curable resin, and the anticorrosive agent is applied at room temperature.
  3. 　導体が絶縁体で被覆された被覆電線の端部に端子が接続された接続部に防食剤が塗布された防食剤塗布部を備える端子付き電線であって、
    　防食剤の塗布が、前記接続部の下方から前記接続部に防食剤を接触させ、前記接続部に防食剤を浸透させることにより行われたものであり、
    　前記防食剤の常温における粘度が、１０００～３００００ｍPａ・ｓの範囲内であることを特徴とする端子付き電線。     An electric wire with a terminal provided with an anticorrosive agent-applied portion in which an anticorrosive agent is applied to a connection portion in which a terminal is connected to an end portion of a covered electric wire whose conductor is covered with an insulator,
    Application of the anticorrosive agent is performed by bringing the anticorrosive agent into contact with the connecting portion from below the connecting portion and allowing the anticorrosive agent to penetrate into the connecting portion,
    A terminal-attached electric wire, wherein the anticorrosive has a viscosity at room temperature of 1000 to 30000 mPa · s.
  4. 　前記被覆電線の導体がアルミニウム系金属であり、前記端子金具が銅系金属であり、上記接続部が異種金属接続部であることを特徴とする請求項３に記載の端子付き電線。
          The electric wire with a terminal according to claim 3, wherein the conductor of the covered electric wire is an aluminum-based metal, the terminal fitting is a copper-based metal, and the connecting portion is a dissimilar metal connecting portion.
PCT/JP2016/064024 2015-05-29 2016-05-11 Terminal-equipped electric wire and method for producing same WO2016194566A1 (en)

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JP2010192216A (en) * 2009-02-17 2010-09-02 Autonetworks Technologies Ltd Corrosion-proof method of electrical connection part, and connection structure of electric wire and terminal metal fitting
JP2011113708A (en) * 2009-11-25 2011-06-09 Autonetworks Technologies Ltd Electric wire with terminal and method of manufacturing the same
JP2011238500A (en) * 2010-05-12 2011-11-24 Furukawa Electric Co Ltd:The Connection structure and manufacturing method thereof
JP5299210B2 (en) * 2009-10-14 2013-09-25 住友電装株式会社 Anticorrosive coating device, wire holding member with terminal, anticorrosive coating method, and wire with anticorrosive coated terminal
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JP2010192216A (en) * 2009-02-17 2010-09-02 Autonetworks Technologies Ltd Corrosion-proof method of electrical connection part, and connection structure of electric wire and terminal metal fitting
JP5299210B2 (en) * 2009-10-14 2013-09-25 住友電装株式会社 Anticorrosive coating device, wire holding member with terminal, anticorrosive coating method, and wire with anticorrosive coated terminal
JP2011113708A (en) * 2009-11-25 2011-06-09 Autonetworks Technologies Ltd Electric wire with terminal and method of manufacturing the same
JP2011238500A (en) * 2010-05-12 2011-11-24 Furukawa Electric Co Ltd:The Connection structure and manufacturing method thereof
WO2014148071A1 (en) * 2013-03-22 2014-09-25 株式会社オートネットワーク技術研究所 Covered electric wire with terminal

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