JP2012018889A - Terminal fitting and method of manufacturing the same - Google Patents

Terminal fitting and method of manufacturing the same Download PDF

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JP2012018889A
JP2012018889A JP2010156975A JP2010156975A JP2012018889A JP 2012018889 A JP2012018889 A JP 2012018889A JP 2010156975 A JP2010156975 A JP 2010156975A JP 2010156975 A JP2010156975 A JP 2010156975A JP 2012018889 A JP2012018889 A JP 2012018889A
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wire
electric wire
metal
terminal fitting
core wire
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JP5590389B2 (en
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Hiroki Shimoda
洋樹 下田
Hiroki Hirai
宏樹 平井
Junichi Ono
純一 小野
Takuji Otsuka
拓次 大塚
Masaaki Tabata
正明 田端
Kazumasa Kobayashi
和将 小林
Satoshi Morikawa
悟史 森川
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a terminal fitting which prevents the occurence of electric corrosion.SOLUTION: A terminal fitting 10 of this invention comprises a wire connection part 23 with which a wire 40 is placed and connected. The wire 40 is formed by coating a core wire 41 made of a material, which is different from a material of the terminal fitting 10, with an insulation coat 42. A core wire barrel piece 25, which is crimped to the core wire 41 exposed from an end of the wire 40, is provided in the wire connection part 23. In a connection area 25A, the core wire barrel piece 25 is electrically connected with the wire 40, and an area other than the connection area 25A, out of a wire placed surface 23A on which the wire 40 of the wire connection part 23 is placed, is covered by a first insulation layer 29 made of an insulation material. Further, a surface 23B, which is opposite to the wire placed surface 23A of the wire connection part 23, is covered by a second insulation layer 29 made of an insulation material.

Description

本発明は、端子金具および端子金具の製造方法に関する。   The present invention relates to a terminal fitting and a method for manufacturing the terminal fitting.

自動車用の電線はその両端部に接続された端子金具を介して車載用の電子機器間を接続する役割を有しており、端子金具と接続される電線の端部は絶縁被膜が剥離されて芯線が露出した状態になっている。この電線の芯線が露出した部分には、端子金具に設けられた芯線バレルが圧着されて機械的・電気的に接続され、電線の絶縁被膜で被覆されている部分には、端子金具に設けられた絶縁被膜バレルが圧着されて機械的に接続されるようになっている(例えば、特許文献1を参照)。   The electric wire for automobiles has a role of connecting between in-vehicle electronic devices via the terminal fittings connected to both ends thereof, and the insulating coating is peeled off at the ends of the electric wires connected to the terminal fittings. The core wire is exposed. A core wire barrel provided on the terminal fitting is crimped and mechanically and electrically connected to the exposed portion of the core wire of the electric wire, and the portion covered with the insulating coating of the electric wire is provided on the terminal fitting. The insulating coating barrel is pressed and mechanically connected (see, for example, Patent Document 1).

自動車のエンジンルーム(室外)に配される機器との接続には、電線と端子金具との接続部に水などが付着するのを防止するため、防水コネクタが用いられている。これに対し、自動車の室内に搭載される機器においては、水などの液体が付着する機会が少ないため、室内搭載機器との接続には、通常、非防水コネクタが用いられている。そのため、例えば、潮風にさらされる場所で車を使用することで、車の内外の気温差などにより発生する結露などと潮風に含まれる塩分とが結びついて塩水が生じ、この塩水が端子金具と室内に配索される電線との接続部に浸入する可能性がある。   A waterproof connector is used for connection with equipment arranged in an engine room (outdoor) of an automobile in order to prevent water or the like from adhering to a connection portion between an electric wire and a terminal fitting. On the other hand, in equipment mounted in the interior of an automobile, there is little opportunity for liquids such as water to adhere to it, and therefore, a non-waterproof connector is usually used for connection to the indoor equipment. Therefore, for example, when a car is used in a place exposed to sea breezes, salt water is generated by combining dew generated due to temperature differences between the inside and outside of the car and the salinity contained in the sea breezes. There is a possibility of intrusion into the connection part with the electric wire routed in.

特開2005−50736号公報JP-A-2005-50736

ところで、室内に配索される電線としては、車両の軽量化等の観点から、近年では、アルミニウム製またはアルミニウム合金製の芯線を絶縁被膜で被覆してなるアルミ電線の需要が高まっている。アルミ電線に接続される端子金具としては、強度上の問題等で黄銅または銅合金製のものを用いるのが一般的である。   By the way, as an electric wire routed indoors, in recent years, from the viewpoint of reducing the weight of a vehicle, the demand for an aluminum electric wire in which a core wire made of aluminum or aluminum alloy is covered with an insulating coating is increasing. As a terminal metal fitting connected to an aluminum electric wire, it is common to use the thing made from a brass or a copper alloy by the problem on intensity | strength etc.

したがって、電線の芯線と端子金具とが接触する部分では、アルミニウムと銅という異種の金属が接触することになる。このような場合、上記に例示したような使用により電線の芯線と端子金具とが接触する部分に塩水が浸入すると、接触部分が電解質溶液(塩水)に浸漬された状態となって、電気化学的反応によってイオン化傾向が大きい金属であるアルミニウムが溶解する、いわゆる電食が進むおそれがあった。   Therefore, in the part where the core wire of the electric wire and the terminal fitting are in contact with each other, different metals such as aluminum and copper come into contact. In such a case, when salt water enters the portion where the core wire of the electric wire and the terminal metal fitting are in contact with each other as exemplified above, the contact portion is immersed in an electrolyte solution (salt water) and is electrochemical. There is a possibility that so-called electrolytic corrosion, in which aluminum which is a metal having a large ionization tendency is dissolved by the reaction, proceeds.

本発明は上記のような事情に基づいて完成されたものであって、電食の発生を防止できる端子金具を提供することを目的とする。   This invention is completed based on the above situations, Comprising: It aims at providing the terminal metal fitting which can prevent generation | occurrence | production of electrolytic corrosion.

上記課題を解決するものとして、本発明は、電線を載置して電気的に接続する電線接続部を備える端子金具であって、前記電線は、前記端子金具を構成する金属材料とは相違する金属材料からなる芯線を絶縁被膜で被覆してなり、前記電線接続部には、前記電線の端末から露出する前記芯線に圧着される芯線バレル片が設けられ、前記電線接続部の前記電線が載置される電線載置面のうち、前記芯線バレル片の前記電線と電気的に接続される接続領域を除く領域は、絶縁性材料からなる第1絶縁層で覆われ、さらに、前記電線接続部の前記電線載置面の反対側の面が、絶縁性材料からなる第2絶縁層で覆われているところに特徴を有する。   In order to solve the above-mentioned problems, the present invention is a terminal fitting provided with a wire connecting portion for placing and electrically connecting an electric wire, wherein the electric wire is different from a metal material constituting the terminal fitting. A core wire made of a metal material is covered with an insulating coating, and the wire connection portion is provided with a core wire barrel piece that is crimped to the core wire exposed from the end of the wire, and the wire of the wire connection portion is mounted thereon. Of the wire placement surface to be placed, a region excluding a connection region electrically connected to the wire of the core wire barrel piece is covered with a first insulating layer made of an insulating material, and further, the wire connection portion The surface on the opposite side of the electric wire mounting surface is characterized in that it is covered with a second insulating layer made of an insulating material.

本発明においては、端子金具の電線接続部の電線載置面のうち、電線の芯線が圧着されて電気的に接続される接続領域を除く領域が第1絶縁層で覆われている。このように、端子金具の、電線を載置して接続する側の電線載置面を絶縁性材料からなる層で覆う構成とすることで、端子金具の、電線の芯線と直接接触し得る部分が保護されるので、電食の発生を防止することが可能である。
しかしながら、電線載置面の反対側の面にも、塩分などの電解質を含む水が付着することがあり、このような水分に起因する電食が発生する可能性もあるため、電線接続部の電線載置面側の所定領域を絶縁性材料で覆うだけでは、電線載置面の反対側の面に付着する水に起因する電食を十分に防止できない。そこで、本発明においては、端子金具の電線接続部の電線載置面側の所定領域だけでなく、電線接続部の電線載置面の反対側の面も、絶縁性材料からなる第2絶縁層で覆う構成とした。
したがって、本発明では、電線接続部は、接続領域を除く大部分が絶縁性材料からなる層(第1絶縁層および第2絶縁層)により覆われるため、電食が生じ難くなり、その結果、本発明によれば、電食を防止することができる。
In this invention, the area | region except the connection area | region where the core wire of an electric wire is crimped | bonded and electrically connected among the electric wire mounting surfaces of the electric wire connection part of a terminal metal fitting is covered with the 1st insulating layer. Thus, the portion of the terminal fitting that can be in direct contact with the core wire of the electric wire by covering the electric wire placement surface on the side where the electric wire is placed and connected with a layer made of an insulating material. Is protected, so that the occurrence of electrolytic corrosion can be prevented.
However, water containing electrolytes such as salt may adhere to the surface on the opposite side of the wire mounting surface, and there is a possibility that electrolytic corrosion due to such moisture may occur. By simply covering a predetermined area on the electric wire placement surface side with an insulating material, it is not possible to sufficiently prevent electrolytic corrosion caused by water adhering to the surface opposite to the electric wire placement surface. Therefore, in the present invention, not only the predetermined region on the wire placement surface side of the wire connection portion of the terminal fitting, but also the surface on the opposite side of the wire placement surface of the wire connection portion is the second insulating layer made of an insulating material. It was set as the structure covered with.
Therefore, in the present invention, the electric wire connection portion is covered with a layer made of an insulating material (the first insulating layer and the second insulating layer), except for the connection region, so that electric corrosion hardly occurs. According to the present invention, electrolytic corrosion can be prevented.

本発明の端子金具は、以下の構成であってもよい。
前記絶縁性材料がポリエチレンテレフタレートであってもよい。ポリエチレンテレフタレートからなる絶縁層は、ピンホールも生じ難いので、上記のような構成とすると、確実に電食を防止することができる。
The terminal fitting of the present invention may have the following configuration.
The insulating material may be polyethylene terephthalate. Since the insulating layer made of polyethylene terephthalate is unlikely to generate pinholes, the above-described configuration can reliably prevent electrolytic corrosion.

上記構成において、前記電線接続部の端面には、イオン化傾向が、前記電線接続部を構成する金属材料よりも、前記芯線を構成する金属材料に近い金属によりめっきが施されていてもよい。
本発明の端子金具を、例えば、端子金具を構成する金属板の所定領域に第1絶縁層および第2絶縁層を形成した後、所定形状に打ち抜いて組み立てることにより作製すると、打ち抜き工程により形成された端面は、絶縁性材料により覆われていないため、当該端面に付着する水分や当該端面と電線の芯線との接触に起因する電食の発生が懸念される。
そこで、上述のような構成とすると、電線接続部の端面に、イオン化傾向が、芯線を構成する金属材料に近い金属によるめっきが施されるので、電線接続部の端面と芯線とのイオン化傾向の差(電位差)が小さくなり、これにより電食が起こりにくくなるとともに、電食のスピードが抑制される。その結果、本発明によれば、電食を確実に防止することができる。
In the above configuration, the end face of the electric wire connection portion may be plated with a metal whose ionization tendency is closer to the metal material constituting the core wire than the metal material constituting the electric wire connection portion.
When the terminal metal fitting of the present invention is produced by, for example, forming a first insulating layer and a second insulating layer in a predetermined region of a metal plate constituting the terminal metal fitting and then punching and assembling the metal plate, it is formed by a punching process. Since the end face is not covered with an insulating material, there is a concern that moisture adheres to the end face or generation of electrolytic corrosion due to contact between the end face and the core wire of the electric wire.
Therefore, with the configuration as described above, since the ionization tendency is plated on the end surface of the wire connection portion by a metal close to the metal material constituting the core wire, the ionization tendency between the end surface of the wire connection portion and the core wire is reduced. The difference (potential difference) becomes small, which makes it difficult for electrolytic corrosion to occur, and suppresses the speed of electrolytic corrosion. As a result, according to the present invention, electrolytic corrosion can be reliably prevented.

上記構成において、前記芯線を構成する材料がアルミニウムを含む金属である一方、前記電線接続部は銅を含む金属から構成され、かつ、前記電線接続部の端面には、スズめっきが施されていてもよい。このような構成とすると、電線を軽量化することができ、端子金具を強度に優れたものとするとともに、スズめっきにより端子間の接触抵抗を低下することができる。また、スズとアルミニウムとは、イオン化傾向の差が小さいので電食のスピードが抑制される。   In the above configuration, the material constituting the core wire is a metal containing aluminum, while the wire connecting portion is made of a metal containing copper, and the end surface of the wire connecting portion is tin-plated. Also good. With such a configuration, it is possible to reduce the weight of the electric wire, to make the terminal fitting excellent in strength, and to reduce the contact resistance between the terminals by tin plating. Moreover, since the difference in ionization tendency is small between tin and aluminum, the speed of electrolytic corrosion is suppressed.

また、上記課題を解決するものとして、本発明は、芯線を絶縁被膜で被覆してなる電線を載置して接続する電線接続部を備え、前記電線接続部に、前記電線の端末から露出した前記芯線を圧着して電気的に接続する芯線バレル片を設けた端子金具の製造方法であって、前記芯線と相違する材料からなり前記端子金具を構成する金属製の板材の一方の面の、前記電線接続部に対応する部分のうち、前記芯線バレル片の前記電線と接続される接続領域に相当する部分以外の部分に、絶縁性材料からなる第1絶縁層を形成するとともに、前記板材の他方の面の前記電線接続部に対応する部分に絶縁性材料からなる第2絶縁層を形成した後に、前記第1絶縁層および前記第2絶縁層が形成された板材を所定形状に打ち抜く打抜き工程を実行し、前記打抜き工程を実行した後の板材に、イオン化傾向が、当該板材を構成する金属材料よりも、前記芯線を構成する金属材料に近い金属をめっきするめっき工程を実行するところに特徴を有する。   Moreover, as what solves the said subject, this invention is equipped with the electric wire connection part which mounts and connects the electric wire formed by coat | covering a core wire with an insulating film, and exposed to the said electric wire connection part from the terminal of the said electric wire. A method of manufacturing a terminal fitting provided with a core wire barrel piece that is crimped and electrically connected to the core wire, and is made of a material different from the core wire, and is formed on one surface of a metal plate that constitutes the terminal fitting. Of the portion corresponding to the wire connecting portion, the first insulating layer made of an insulating material is formed in a portion other than the portion corresponding to the connecting region connected to the wire of the core barrel piece, and the plate member A punching step of punching the plate material on which the first insulating layer and the second insulating layer are formed into a predetermined shape after forming a second insulating layer made of an insulating material on a portion corresponding to the wire connecting portion on the other surface Run and hit The plate after performing the can process, ionization tendency than the metal material constituting the plate material, characterized in place to perform the plating step of plating a metal similar to that of a metal material constituting the core wire.

本発明の製造方法により得られる端子金具においては、電線接続部の電線載置面のうち、電線の芯線が圧着されて電気的に接続される接続領域を除く領域に絶縁性材料からなる層(第1絶縁層)を形成するだけでなく、電線接続部の電線載置面の反対側の面にも絶縁性材料からなる層(第2絶縁層)が形成される。
したがって、本発明の製造方法により得られる端子金具では、電線接続部の大部分が絶縁製材料からなる層(第1絶縁層および第2絶縁層)により覆われるため、電食が生じ難くなる。
In the terminal fitting obtained by the manufacturing method of the present invention, a layer made of an insulating material in a region excluding the connection region where the core wire of the electric wire is crimped and electrically connected among the electric wire placement surfaces of the electric wire connection portion ( In addition to forming the first insulating layer, a layer made of an insulating material (second insulating layer) is also formed on the surface of the wire connecting portion opposite to the wire placement surface.
Therefore, in the terminal metal fitting obtained by the manufacturing method of the present invention, most of the electric wire connecting portion is covered with the layers made of an insulating material (first insulating layer and second insulating layer), and therefore it is difficult for electrolytic corrosion to occur.

特に、本発明の製造方法においては、打抜き工程を実行した後に、イオン化傾向が、芯線を構成する金属材料に近い金属を用いて板材のめっきを行うので、端子金具の端面と芯線とのイオン化傾向の差が小さくなり、これにより電食が起こり難くなるとともに、電食のスピードが遅くなる。その結果、本発明によれば、電食を確実に防止することができる。   In particular, in the manufacturing method of the present invention, after performing the punching process, the ionization tendency is to plate the plate material using a metal close to the metal material constituting the core wire, so the ionization tendency between the end surface of the terminal metal and the core wire This reduces the difference between them, which makes it difficult for electric corrosion to occur and slows the speed of electric corrosion. As a result, according to the present invention, electrolytic corrosion can be reliably prevented.

また、本発明の製造方法においては、第1絶縁層および第2絶縁層を形成したのちに打抜き工程を実行するので、個々の端子金具に合わせて各絶縁層を形成する必要がない。その結果、本発明によれば、簡素な方法により端子金具を作製することが可能である。
さらに、本発明の製造方法においては、第1絶縁層および第2絶縁層を形成したのちにめっき工程を実行するから、めっき工程を実行してから絶縁性材料からなる層を形成する場合よりも、端子金具を構成する板材と絶縁製材料からなる層とを接着させやすく、作業性に優れる。
Further, in the manufacturing method of the present invention, since the punching process is performed after forming the first insulating layer and the second insulating layer, it is not necessary to form each insulating layer in accordance with each terminal fitting. As a result, according to the present invention, the terminal fitting can be produced by a simple method.
Furthermore, in the manufacturing method of the present invention, since the plating step is performed after the first insulating layer and the second insulating layer are formed, compared to the case where the layer made of an insulating material is formed after the plating step is performed. The plate material constituting the terminal metal and the layer made of an insulating material can be easily bonded, and the workability is excellent.

本発明の製造方法は以下の構成であってもよい。
前記めっき工程を、前記打抜き工程を実行した後の板材の端面に対して実行してもよい。
打抜き工程により形成された端面は、絶縁製材料からなる層に覆われていないため、当該端面に付着する水分や当該端面と電線の芯線との接触に起因する電食の発生が懸念される。そこで、上記のような構成とすると、板材の端面に、芯線を構成する金属材料にイオン化傾向が近い金属によるめっきが施されるので、端面と芯線とのイオン化傾向の差が小さくなり、端面における電食が起こりにくくなるとともに、電食のスピードが抑制される。
The manufacturing method of the present invention may have the following configuration.
You may perform the said plating process with respect to the end surface of the board | plate material after performing the said punching process.
Since the end surface formed by the punching process is not covered with a layer made of an insulating material, there is a concern that moisture adheres to the end surface or generation of electrolytic corrosion due to contact between the end surface and the core of the electric wire. Therefore, with the configuration as described above, because the metal material constituting the core wire is plated with a metal that is close to ionization tendency on the end surface of the plate material, the difference in ionization tendency between the end surface and the core wire is reduced, and the end surface Electric corrosion is less likely to occur, and the speed of electric corrosion is suppressed.

前記絶縁性材料がポリエチレンテレフタレート製のフィルムであってもよい。このような構成とすると、ポリエチレンテレフタレートはピンホールも生じ難い材料であるので、確実に電食を防止することができ、かつ、板材の所定領域に貼り付けることにより第1絶縁層および第2絶縁層を形成できるので、作業性に優れる。   The insulating material may be a film made of polyethylene terephthalate. With such a configuration, since polyethylene terephthalate is a material that does not easily generate pinholes, it is possible to reliably prevent galvanic corrosion and to paste the first insulating layer and the second insulating layer on a predetermined region of the plate material. Since a layer can be formed, workability is excellent.

前記芯線を構成する材料がアルミニウムを含む金属である一方、前記板材を構成する金属材料は銅を含む金属から構成され、かつ、前記めっき工程において前記板材にスズめっきを施してもよい。
このような構成とすると、電線を軽量化することができ、端子金具を強度に優れたものとするとともに、スズめっきにより端子間の接触抵抗を低下することができる。また、スズとアルミニウムとは、イオン化傾向が近いので電食のスピードが抑制される。
While the material constituting the core wire is a metal containing aluminum, the metal material constituting the plate material may be made of a metal containing copper, and tin plating may be performed on the plate material in the plating step.
With such a configuration, it is possible to reduce the weight of the electric wire, to make the terminal fitting excellent in strength, and to reduce the contact resistance between the terminals by tin plating. Moreover, since tin and aluminum have a close ionization tendency, the speed of electrolytic corrosion is suppressed.

本発明によれば、電食の発生を防止できる端子金具を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the terminal metal fitting which can prevent generation | occurrence | production of electrolytic corrosion can be provided.

実施形態1の端子金具の側面図Side view of terminal fitting of embodiment 1 端子金具の電線接続部を示す一部平面図Partial plan view showing the wire connection part of the terminal fitting 打抜き加工を施した板材の一部を示す平面図Plan view showing a part of a punched plate 図3の裏面図Back view of FIG. 図3の要部拡大図3 is an enlarged view of the main part of FIG. 電線を載置した状態の端子金具の一部を示す平面図A plan view showing a part of a terminal fitting with an electric wire placed thereon 板材の所定領域に第1絶縁層を形成した状態を示す一部平面図The partial top view which shows the state which formed the 1st insulating layer in the predetermined area | region of a board | plate material 図7の裏面図であって、板材の所定領域に第2絶縁層を形成した状態を示す一部裏面図FIG. 8 is a rear view of FIG. 7 and is a partial rear view showing a state in which a second insulating layer is formed in a predetermined region of the plate material.

<実施形態1>
本発明を具体化した実施形態1の端子金具10を、図1ないし図8によって説明する。以下の説明においては、図1および図2における左側を前とし、図3〜図8における上側を前とする。
本実施形態の端子金具10は、図1および図2に示す雌型の端子金具10であり、銅または銅合金製の金属板にスズめっきを施した金属材料から構成されている。本実施形態の端子金具10は、図3に示すような展開形状の端子金具片10Aに曲げ加工などを施すことで図1に示すような形状に成形されている。
<Embodiment 1>
A terminal fitting 10 of Embodiment 1 embodying the present invention will be described with reference to FIGS. In the following description, the left side in FIGS. 1 and 2 is the front, and the upper side in FIGS. 3 to 8 is the front.
The terminal metal fitting 10 of this embodiment is the female terminal metal fitting 10 shown in FIGS. 1 and 2, and is made of a metal material obtained by tin plating a copper or copper alloy metal plate. The terminal fitting 10 of this embodiment is formed into a shape as shown in FIG. 1 by bending the terminal fitting piece 10A having a developed shape as shown in FIG.

端子金具10は、前後に開口する略箱型をなす本体部11を備え、この本体部11内には、前方から相手の雄型の端子金具のタブ(図示せず)が挿入可能とされている。端子金具10の本体部11の後側には、電線40を載置して接続する電線接続部23が設けられている(詳細は後述する)。   The terminal fitting 10 includes a main body portion 11 having a substantially box shape that opens forward and backward, and a tab (not shown) of a mating male terminal fitting can be inserted into the main body portion 11 from the front. Yes. On the rear side of the main body portion 11 of the terminal fitting 10, an electric wire connecting portion 23 for placing and connecting the electric wires 40 is provided (details will be described later).

端子金具10の本体部11は、図3に示す展開形状の端子金具片10Aを折曲線L1に沿って折り曲げることで角筒状に成形されている。本体部11は、前後に延出する底壁13と、底壁13の両側縁から立ち上げられる一対の側壁14,15と、側壁14から連なり底壁13と対向する天井壁16と、側壁15から連なり天井壁16の外側に重ね合わせられる外壁17とから構成されている。天井壁16の側縁には、側壁15側へ突出する支持片18が設けられ、この支持片18が外壁17に切り欠き形成された差込溝19内に差し込まれるとともに差込溝19の側縁(側壁15の上端面)に当接されることで、天井壁16を底壁13とほぼ平行な姿勢に支持可能とされている。   The main body 11 of the terminal fitting 10 is formed in a rectangular tube shape by bending the developed terminal fitting piece 10A shown in FIG. 3 along the folding line L1. The main body 11 includes a bottom wall 13 extending forward and backward, a pair of side walls 14 and 15 raised from both side edges of the bottom wall 13, a ceiling wall 16 that continues from the side wall 14 and faces the bottom wall 13, and a side wall 15. And an outer wall 17 that overlaps the outside of the ceiling wall 16. A support piece 18 projecting toward the side wall 15 is provided at the side edge of the ceiling wall 16, and the support piece 18 is inserted into an insertion groove 19 formed in a cutout in the outer wall 17 and at the side of the insertion groove 19. By contacting the edge (the upper end surface of the side wall 15), the ceiling wall 16 can be supported in a posture substantially parallel to the bottom wall 13.

底壁13の前端からはタブに対して弾性接触可能な弾性接触片20が設けられている。弾性接触片20の構造の詳細は図示しないが、図3に示す展開状態において底壁13から前方へ真っ直ぐに延出する舌片20Aを、本体部11における前端位置にて後方へ折り返した後、本体部11における長さ方向略中央位置にて前方へ折り返して形成されている。弾性接触片20のうち前後の折返部の間の部分が、天井壁16と対向するとともにタブに対して直接に接触可能なタブ接触部20aとされるのに対し、後側の折返部から前方へ突出する部分が、底壁13に当接可能とされる支持部20bとされ、その先端部20cは図1における上方へ向けて屈曲形成されている。弾性接触片20は、本体部11内に挿入されたタブを天井壁16とタブ接触部20aとの間で挟圧状態に保持可能とされ、タブにより押圧されることで弾性変形されるようになっており、このとき支持部20bが底壁13に当接されるとともに支持部20bの先端部20cがタブ接触部20aの裏側に当接されることで、弾性接触片20が過度撓みするのを規制可能とされる。また弾性接触片20は、底壁13よりも幅狭に形成されている。底壁13には、端子金具10をハウジング(図示せず)のキャビティ内に収容したときにキャビティ内に設けられたランスが進入して係止可能な係止孔21が開口して形成されている。また係止孔21の両側縁(両側壁14,15の下端)からは、キャビティ内への挿入動作の案内などに機能するスタビライザ22が一対突設されている。   An elastic contact piece 20 that can elastically contact the tab is provided from the front end of the bottom wall 13. Although details of the structure of the elastic contact piece 20 are not shown, after the tongue piece 20A extending straight forward from the bottom wall 13 in the unfolded state shown in FIG. The main body 11 is formed by folding forward at a substantially central position in the length direction. A portion between the front and rear folded portions of the elastic contact piece 20 is a tab contact portion 20a that is opposed to the ceiling wall 16 and can be directly contacted with the tab. The portion protruding to the bottom is a support portion 20b that can come into contact with the bottom wall 13, and the tip portion 20c is bent upward in FIG. The elastic contact piece 20 can hold the tab inserted into the main body 11 in a state of being pinched between the ceiling wall 16 and the tab contact portion 20a, and is elastically deformed by being pressed by the tab. At this time, the elastic contact piece 20 is excessively bent by the support portion 20b being in contact with the bottom wall 13 and the tip portion 20c of the support portion 20b being in contact with the back side of the tab contact portion 20a. Can be regulated. The elastic contact piece 20 is formed to be narrower than the bottom wall 13. A locking hole 21 is formed in the bottom wall 13 so that when the terminal fitting 10 is accommodated in a cavity of a housing (not shown), a lance provided in the cavity enters and can be locked. Yes. A pair of stabilizers 22 functioning as guides for the insertion operation into the cavities and the like protrude from both side edges of the locking holes 21 (lower ends of the side walls 14 and 15).

端子金具10の電線接続部23は、本体部11の底壁13の後端から後方へ延出されて設けられている。電線接続部23においては、本体部11の底壁13から連なって底壁13の幅方向に張り出し形成された2組のバレル片24,25が間隔をあけて設けられている。これら2組のバレル片24,25は、それぞれ、幅方向に対称に張り出し形成されている。   The wire connection part 23 of the terminal fitting 10 is provided to extend rearward from the rear end of the bottom wall 13 of the main body part 11. In the electric wire connection portion 23, two sets of barrel pieces 24 and 25 are provided at intervals from each other so as to extend from the bottom wall 13 of the main body portion 11 and extend in the width direction of the bottom wall 13. The two sets of barrel pieces 24 and 25 are formed so as to project symmetrically in the width direction.

電線接続部23に配される電線40は、端子金具10の材料とは相違する金属からなる金属細線(例えば、アルミニウム製またはアルミニウム合金製の金属細線)を撚り合わせてなる芯線41を絶縁製の材料からなる絶縁被膜42で被覆したものである。電線40の端末40Aは、絶縁被膜42が剥離されて芯線41が露出した状態になっている。電線40は、露出した芯線41の端末41Aを本体部11側に向けて端子金具10に接続される。   The electric wire 40 arranged in the electric wire connecting portion 23 is made of an insulating core wire 41 formed by twisting metal fine wires made of a metal different from the material of the terminal fitting 10 (for example, a metal fine wire made of aluminum or aluminum alloy). It is coated with an insulating coating 42 made of a material. The terminal 40A of the electric wire 40 is in a state where the insulating coating 42 is peeled off and the core wire 41 is exposed. The electric wire 40 is connected to the terminal fitting 10 with the terminal 41A of the exposed core wire 41 facing the main body 11 side.

電線接続部23の2組のバレル片24,25のうち、前側(本体部11側)のバレル片25は露出した芯線41を圧着して端子金具10と接続する芯線バレル片25とされ、後側(後端側)のバレル片24は電線40の絶縁被膜42で被覆している部分を圧着して端子金具10と接続する絶縁被膜バレル片24とされる。
芯線バレル片25の電線40が載置される面23A(電線載置面23A、図1における上側に配される面)には、電線40を圧着する際に芯線41の周囲に形成された酸化膜を破るための複数の凹部28が複数凹設されている(図3、図5および図6を参照)。複数の凹部28が設けられている領域25Aは、電線40と芯線バレル片25とが電気的に接続される接続領域25Aである。
Of the two barrel pieces 24 and 25 of the wire connection portion 23, the barrel piece 25 on the front side (main body portion 11 side) is a core wire barrel piece 25 that crimps the exposed core wire 41 and connects it to the terminal fitting 10. The barrel piece 24 on the side (rear end side) is an insulating coating barrel piece 24 that is crimped to a portion covered with the insulating coating 42 of the electric wire 40 and connected to the terminal fitting 10.
On the surface 23A on which the electric wire 40 of the core wire barrel piece 25 is placed (the electric wire placing surface 23A, the surface arranged on the upper side in FIG. 1), the oxidation formed around the core wire 41 when the electric wire 40 is crimped. A plurality of recesses 28 for breaking the film are provided (see FIGS. 3, 5 and 6). The region 25A where the plurality of recesses 28 are provided is a connection region 25A where the electric wire 40 and the core wire barrel piece 25 are electrically connected.

凹部28の孔縁は電線40を圧着する前の状態において、図3の紙面を貫通する方向から見て平行四辺形状をなしている。複数の凹部28は、芯線バレル片25が芯線41に圧着された状態で芯線41が延びる方向について間隔を空けて配されるとともに、芯線41が延びる方向に交差する方向について間隔を空けて配されている(図6を参照)。   The hole edges of the recesses 28 have a parallelogram shape when viewed from the direction penetrating the paper surface of FIG. The plurality of recesses 28 are arranged at intervals in the direction in which the core wire 41 extends in a state where the core wire barrel piece 25 is crimped to the core wire 41 and at intervals in the direction intersecting the direction in which the core wire 41 extends. (See FIG. 6).

芯線バレル片25と本体部11の後端との間の領域26は、電線40の端部40A(端末40A)が配される端部配置領域26であり、この端部配置領域26は、電線40を接続した状態において一部(図1では上側)が開放状態となっており、芯線41が露出状態(外側から目視可能な状態)で配されている(図1および図2を参照)。端部配置領域26の図1における上側に配される板厚方向の面26A(端子金具の端面23Cに相当)には、スズめっきが施されている。   An area 26 between the core wire barrel piece 25 and the rear end of the main body 11 is an end arrangement area 26 in which an end 40A (terminal 40A) of the electric wire 40 is arranged, and the end arrangement area 26 is an electric wire. In a state where 40 is connected, a part (upper side in FIG. 1) is in an open state, and the core wire 41 is arranged in an exposed state (a state visible from the outside) (see FIGS. 1 and 2). A plate thickness direction surface 26 </ b> A (corresponding to the end surface 23 </ b> C of the terminal fitting) disposed on the upper side in FIG. 1 of the end portion arrangement region 26 is subjected to tin plating.

芯線バレル片25と絶縁被膜バレル片24との間の領域27は絶縁被膜42の端末42Aと、絶縁被膜の端末42Aから露出した芯線41とが配される芯線配置領域27であり、端部配置領域26と同様に、電線40を接続した状態において一部(図1では上側)が開放状態となっており、芯線41が露出状態(外側から目視可能な状態)で配されている(図1および図2を参照)。芯線配置領域27の図1における上側に配される板厚方向の面27A(端子金具の端面23Cに相当)には、スズめっきが施されている。   A region 27 between the core wire barrel piece 25 and the insulating coating barrel piece 24 is a core wire arrangement region 27 in which the terminal 42A of the insulating coating 42 and the core wire 41 exposed from the terminal 42A of the insulating coating are arranged, and the end portion is arranged. Similarly to the region 26, a part (the upper side in FIG. 1) is in an open state in a state where the electric wire 40 is connected, and the core wire 41 is arranged in an exposed state (a state visible from the outside) (FIG. 1). And see FIG. A plate 27A (corresponding to the end face 23C of the terminal fitting) 27A in the thickness direction disposed on the upper side in FIG.

さて、本実施形態の端子金具10の電線接続部23の電線載置面23A(図3、図5〜図7に描かれている側の面)は、図7および図8に示すように、芯線バレル片25の接続領域25Aを除き、絶縁性材料からなる第1絶縁層29Aで覆われている。具体的には、電線載置面23Aにおいては、電線接続部23の前端23Eから芯線バレル片25の前側縁部25Bに至る領域および芯線バレル片25の後側縁部25Cから電線接続部23の後端23Fに至る領域が、第1絶縁層29Aで覆われている。   Now, as shown in FIGS. 7 and 8, the wire placement surface 23 </ b> A (surface on the side depicted in FIGS. 3 and 5 to 7) of the wire connection portion 23 of the terminal fitting 10 of the present embodiment is as follows. Except for the connection region 25A of the core barrel piece 25, it is covered with a first insulating layer 29A made of an insulating material. Specifically, in the electric wire placement surface 23 </ b> A, the region from the front end 23 </ b> E of the electric wire connection portion 23 to the front side edge portion 25 </ b> B of the core wire barrel piece 25 and the rear side edge portion 25 </ b> C of the core wire barrel piece 25. A region reaching the rear end 23F is covered with the first insulating layer 29A.

一方、電線載置面23Aの反対側の面23B(図4および図8に描かれている側の面)については、電線接続部23のほぼ全域が、絶縁性材料からなる第2絶縁層29Bで覆われている。なお、第1絶縁層29Aおよび第2絶縁層29Bにより覆われている部分については、図中、網掛けで示した。   On the other hand, for the surface 23B on the opposite side of the wire placement surface 23A (the surface on the side depicted in FIGS. 4 and 8), the almost entire region of the wire connection portion 23 is the second insulating layer 29B made of an insulating material. Covered with. Note that the portions covered with the first insulating layer 29A and the second insulating layer 29B are indicated by hatching in the drawing.

本実施形態において、第1絶縁層29Aおよび第2絶縁層29Bを構成する絶縁性材料は、ポリエチレンテレフタレート(PET)である。   In the present embodiment, the insulating material constituting the first insulating layer 29A and the second insulating layer 29B is polyethylene terephthalate (PET).

次に、本実施形態の端子金具10の製造方法の一例を説明する。
まず、絶縁性フィルム29としてPBT製フィルムを用い、金属材料からなる板材1(例えば銅製の金属板)の所定領域に当該絶縁性フィルム29を貼り付けて第1絶縁層29Aおよび第2絶縁層29Bを形成する(図7および図8を参照)。
詳しくは、板材1の一方の面1A(図7に描かれている側の面、電線載置面23Aに対応する面)においては、図7に示すように、帯状をなす2本の絶縁性フィルム29,29を、電線接続部23の、接続領域25Aを挟む2つの領域(電線接続部23の前端23Eから芯線バレル片25の前側縁部25Bに至る領域、および芯線バレル片25の後側縁部25Cから電線接続部の後端23Eまでの領域)に対応する部分に貼り付けることにより、第1絶縁層29Aが形成される。
なお、接続領域25Aには、第1絶縁層29Aは形成されないので、端子金具10と電線40との電気的な接続に悪影響を与えることはない。
板材1の他方の面1B(図8に描かれている側の面、電線載置面とは反対側の面23Bに対応する面)においては、図8に示すように、帯状をなす絶縁フィルム29を電線接続部23に対応する部分に貼り付けることにより、第2絶縁層29Bが形成される。
Next, an example of the manufacturing method of the terminal metal fitting 10 of this embodiment is demonstrated.
First, a PBT film is used as the insulating film 29, the insulating film 29 is attached to a predetermined region of the plate 1 made of a metal material (for example, a copper metal plate), and the first insulating layer 29A and the second insulating layer 29B. (See FIGS. 7 and 8).
Specifically, on one surface 1A of the plate 1 (the surface on the side depicted in FIG. 7, the surface corresponding to the electric wire placement surface 23A), as shown in FIG. The films 29 and 29 are separated into two regions (a region extending from the front end 23E of the wire connection part 23 to the front edge 25B of the core wire barrel piece 25 and the rear side of the core wire barrel piece 25). The first insulating layer 29 </ b> A is formed by pasting on a portion corresponding to the region from the edge portion 25 </ b> C to the rear end 23 </ b> E of the wire connection portion.
In addition, since the first insulating layer 29A is not formed in the connection region 25A, the electrical connection between the terminal fitting 10 and the electric wire 40 is not adversely affected.
On the other surface 1B of the plate 1 (the surface on the side depicted in FIG. 8, the surface corresponding to the surface 23B on the opposite side of the wire placement surface), as shown in FIG. The second insulating layer 29 </ b> B is formed by pasting 29 on the portion corresponding to the wire connecting portion 23.

次に、板材1を図7および図8に示す点線に沿って打抜く打抜き工程を実行すると、図4に示す形状の連鎖端子30が得られる。図7および図8に示す点線は、端子金具片10Aが複数連結された連鎖端子30の形状(所定形状)を示している。
次に、板材1の一方の面1Aの芯線バレル片25の接続領域25Aに、図示しない複数の凸部が突出形成された金型を用いてプレス加工を施すことにより、複数の凹部28を形成すると、図3に示す連鎖端子30が得られる。
Next, when a punching process for punching the plate 1 along the dotted line shown in FIGS. 7 and 8 is executed, a chain terminal 30 having the shape shown in FIG. 4 is obtained. The dotted lines shown in FIGS. 7 and 8 indicate the shape (predetermined shape) of the chain terminal 30 in which a plurality of terminal metal pieces 10A are connected.
Next, a plurality of recesses 28 are formed by pressing the connection region 25A of the core wire barrel piece 25 on one surface 1A of the plate member 1 using a mold in which a plurality of projections (not shown) are formed to protrude. Then, the chain terminal 30 shown in FIG. 3 is obtained.

連鎖端子30においては、複数の端子金具片10Aがキャリア31,35に連結されている。連鎖端子30は、図3に示すように、図示横方向に沿って延出する帯状をなす一対のキャリア31,35に対し、複数の端子金具片10Aを図示横方向、すなわちキャリア31,35の長手方向(延出方向)に沿ってほぼ等間隔に並んだ状態で連結した構成とされている。各端子金具片10Aは、その長さ方向を図示縦方向、すなわち連鎖端子30における幅方向に沿わせた姿勢とした状態で、前後の各一端部がそれぞれキャリア31,35の幅方向の一方の縁部に連結されている。   In the chain terminal 30, a plurality of terminal metal pieces 10 </ b> A are connected to the carriers 31 and 35. As shown in FIG. 3, the chain terminal 30 has a plurality of terminal fitting pieces 10 </ b> A in the illustrated horizontal direction, that is, the carriers 31, 35 of the pair of carriers 31, 35 extending in the illustrated horizontal direction. It is set as the structure connected in the state located in a line at substantially equal intervals along the longitudinal direction (extending direction). Each terminal fitting piece 10A has a longitudinal direction in the vertical direction shown in the drawing, that is, a position along the width direction of the chain terminal 30, and each of the front and rear ends is one of the width directions of the carriers 31 and 35, respectively. Connected to the edge.

端子金具片10Aの前端部は、図3における上側のキャリア31に連結されている。端子金具片10Aの前端部に形成された弾性接触片20の先端部20cは、キャリア31の幅領域内に入り込んだところに形成されている。この端子金具片10Aの前端部を連結する連結部32とキャリア31とは、図示横方向に並んで配されている。   The front end portion of the terminal metal piece 10A is connected to the upper carrier 31 in FIG. The distal end portion 20 c of the elastic contact piece 20 formed at the front end portion of the terminal fitting piece 10 </ b> A is formed at a position where it enters the width region of the carrier 31. The connecting portion 32 and the carrier 31 that connect the front end portion of the terminal metal piece 10A are arranged side by side in the illustrated horizontal direction.

端子金具片10Aの後端部は、図3における下側のキャリア35の側縁に突設された連結部36に連結されている。連結部36は、端子金具片10Aのうち絶縁被膜バレル片24の後端幅方向略中央に繋げられている。これら端子金具片10Aと連結部36とキャリア35とは、図示縦方向、すなわち連鎖端子30全体から見て幅方向に並んで配されている。このキャリア35には、連鎖端子30を送り出すために加工機に設けられた送り爪(図示せず)が係合可能な送り孔33,34が開口して形成されている。この送り孔33,34は、加工機の種類(例えばプレス機や圧着機)によって送り爪の形状が異なることから、その送り爪の形状に合わせて円形の送り孔33と方形の送り孔34の2種類が設けられている。   The rear end portion of the terminal metal piece 10A is connected to a connecting portion 36 protruding from the side edge of the lower carrier 35 in FIG. The connecting portion 36 is connected to the center of the rear end width direction of the insulating coating barrel piece 24 in the terminal fitting piece 10A. The terminal metal piece 10A, the connecting portion 36, and the carrier 35 are arranged side by side in the illustrated vertical direction, that is, in the width direction when viewed from the entire chain terminal 30. The carrier 35 is formed with feed holes 33 and 34 that can be engaged with feed claws (not shown) provided in the processing machine for feeding the chain terminal 30. The feed holes 33 and 34 are different in shape of the feed claw depending on the type of processing machine (for example, a press or a crimping machine). Two types are provided.

次に、打抜き工程を経て得られた連鎖端子30にめっきを施すめっき工程を実行する。めっき工程においては、連鎖端子30の両面(図3に描かれた面と図4に描かれた面)をめっきするだけでなく、連鎖端子30(端子金具10)の板厚方向の面(端面23C)についてもめっきを施す。
めっき工程では、イオン化傾向が、端子金具10(板材1)を構成する金属材料(銅、または銅合金)よりも、芯線41を構成する金属材料(アルミニウム、またはアルミニウム合金)に近い金属(スズ)をめっきする。
めっき工程を経ると端子金具10を構成する板材1の両面1A,1Bならびに端面23Cにメッキ層が形成される。
Next, a plating process for plating the chain terminal 30 obtained through the punching process is executed. In the plating step, not only the both surfaces (the surface depicted in FIG. 3 and the surface depicted in FIG. 4) of the chain terminal 30 are plated, but also the surface in the plate thickness direction (end surface) of the chain terminal 30 (terminal fitting 10). 23C) is also plated.
In the plating step, a metal (tin) whose ionization tendency is closer to the metal material (aluminum or aluminum alloy) constituting the core wire 41 than the metal material (copper or copper alloy) constituting the terminal fitting 10 (plate material 1). Plating.
After the plating step, plating layers are formed on both surfaces 1A and 1B and the end surface 23C of the plate 1 constituting the terminal fitting 10.

次に、キャリア31,35に形成した送り孔33,34に送り爪を係合させることで、端子金具片10Aを順次加工機に送り、その過程で端子金具片10Aに対して曲げ加工などを施す。次に、個々の端子金具片10Aの電線接続部23に設けられた絶縁被膜バレル片24および芯線バレル片25を電線40に圧着させて、端子金具10と電線40とを接続する。具体的には、図6に示すように、電線40を、その芯線41の端末41Aが電線接続部23の端部配置領域26に配されるとともに、絶縁被膜42の端末42Aが芯線配置領域27に配されるように載置してから、芯線バレル片25と絶縁被膜バレル片24とをそれぞれ電線40に圧着させると、図1および図2に示す形状の端子金具10が得られる。   Next, by engaging the feed claws with the feed holes 33 and 34 formed in the carriers 31 and 35, the terminal fitting pieces 10A are sequentially sent to the processing machine, and the terminal fitting pieces 10A are bent in the process. Apply. Next, the insulation coating barrel piece 24 and the core wire barrel piece 25 provided in the wire connection portion 23 of each terminal fitting piece 10 </ b> A are crimped to the wire 40 to connect the terminal fitting 10 and the wire 40. Specifically, as shown in FIG. 6, the terminal 40 </ b> A of the core wire 41 of the electric wire 40 is arranged in the end portion arrangement region 26 of the electric wire connection portion 23, and the terminal 42 </ b> A of the insulating coating 42 is arranged in the core wire arrangement region 27. When the core wire barrel piece 25 and the insulating coating barrel piece 24 are respectively crimped to the electric wires 40, the terminal fitting 10 having the shape shown in FIGS. 1 and 2 is obtained.

次に本実施形態の作用・効果について説明する。
本実施形態においては、端子金具10の電線接続部23の電線載置面23Aのうち、電線の芯線41が圧着されて電気的に接続される接続領域25Aを除く領域が第1絶縁層29Aで覆われ、かつ、電線載置面23Aの反対側の面23Bでは電線接続部23のほぼ全域が第2絶縁層29Bで覆われている。
したがって、本実施形態において、電線接続部23は、接続領域25Aを除く大部分が第1絶縁層29Aおよび第2絶縁層29Bにより覆われているため、電食が生じ難くなっている。
Next, functions and effects of this embodiment will be described.
In the present embodiment, the first insulating layer 29 </ b> A is an area other than the connection area 25 </ b> A where the core wire 41 of the electric wire is crimped and electrically connected in the electric wire placement surface 23 </ b> A of the electric wire connection portion 23 of the terminal fitting 10. In the surface 23B that is covered and opposite to the electric wire placement surface 23A, almost the entire area of the electric wire connection portion 23 is covered with the second insulating layer 29B.
Therefore, in the present embodiment, since most of the electric wire connection portion 23 except the connection region 25A is covered with the first insulating layer 29A and the second insulating layer 29B, it is difficult for electrolytic corrosion to occur.

特に、本実施形態では、電線接続部23の端面(端子金具の端面23C)は、芯線41を構成する金属材料(アルミニウムまたはアルミニウム合金)にイオン化傾向が近い金属(スズ)により、めっきが施されているから、電線接続部23の端面23Cと芯線41とのイオン化傾向の差が小さくなり、これにより電食が起こりにくくなるとともに、電食のスピードが抑制される。その結果、本実施形態によれば、電食を確実に防止することができる。   In particular, in the present embodiment, the end surface of the electric wire connection portion 23 (the end surface 23C of the terminal fitting) is plated with a metal (tin) that is close to ionization to the metal material (aluminum or aluminum alloy) constituting the core wire 41. As a result, the difference in ionization tendency between the end face 23C of the wire connecting portion 23 and the core wire 41 is reduced, which makes it difficult for electrolytic corrosion to occur and suppresses the speed of electrolytic corrosion. As a result, according to this embodiment, electrolytic corrosion can be reliably prevented.

また、本実施形態によれば、絶縁性材料がポリエチレンテレフタレート(PET)であるから、ピンホールも生じ難いので、確実に電食を防止することができる。
さらに、本実施形態の製造方法においては、第1絶縁層29Aおよび第2絶縁層29Bの形成にPET製のフィルム29を用いるので、板材1に所定領域に貼り付けることにより、第1絶縁層29Aおよび第2の絶縁層29Bを形成することができ、作業性に優れる。
In addition, according to the present embodiment, since the insulating material is polyethylene terephthalate (PET), pinholes are hardly generated, and therefore, electrolytic corrosion can be reliably prevented.
Furthermore, in the manufacturing method of the present embodiment, since the PET film 29 is used for forming the first insulating layer 29A and the second insulating layer 29B, the first insulating layer 29A is adhered to the plate 1 in a predetermined region. In addition, the second insulating layer 29B can be formed, and the workability is excellent.

また、本実施形態では、芯線41を構成する材料がアルミニウムを含む金属である一方、電線接続部23は銅を含む金属から構成され、かつ、電線接続部23の端面23Cには、スズめっきが施されているから、電線を軽量化することができ、端子金具10を強度に優れたものとするとともに、スズめっきにより端子間の接触抵抗を低下することができる。   Moreover, in this embodiment, while the material which comprises the core wire 41 is a metal containing aluminum, the electric wire connection part 23 is comprised from the metal containing copper, and tin plating is carried out to the end surface 23C of the electric wire connection part 23. Therefore, the weight of the electric wire can be reduced, the terminal metal fitting 10 can be excellent in strength, and the contact resistance between the terminals can be reduced by tin plating.

また、本実施形態では、第1絶縁層29Aおよび第2絶縁層29Bを形成したのちに打抜き工程を実行するので、個々の端子金具10に合わせて第1絶縁層29Aおよび第2絶縁層29Bを形成する必要がない。その結果、本実施形態によれば、簡素な方法により端子金具10を作製することが可能である。   In this embodiment, since the punching process is performed after the first insulating layer 29A and the second insulating layer 29B are formed, the first insulating layer 29A and the second insulating layer 29B are combined with the individual terminal fittings 10. There is no need to form. As a result, according to this embodiment, it is possible to produce the terminal fitting 10 by a simple method.

さらに、本実施形態においては、第1絶縁層29Aおよび第2絶縁層29Bを形成したのちにめっき工程を実行するから、めっき工程を実行してから第1絶縁層29Aおよび第2絶縁層29Bを形成する場合よりも、端子金具10を構成する板材1に絶縁性材料が接着し易いので、作業性に優れる。   Furthermore, in the present embodiment, since the plating process is performed after the first insulating layer 29A and the second insulating layer 29B are formed, the first insulating layer 29A and the second insulating layer 29B are formed after the plating process is performed. Since the insulating material is easily bonded to the plate material 1 constituting the terminal fitting 10 as compared with the case of forming, the workability is excellent.

<他の実施形態>
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)上記実施形態においては、第1絶縁層と第2絶縁層とをPET製フィルムを貼り付けることにより形成したが、第1絶縁層および第2絶縁層を、相違する絶縁性材料により形成してもよいし、液状の絶縁性材料を塗布して熱処理を施す方法などにより形成してもよい。
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the first insulating layer and the second insulating layer are formed by adhering a PET film, but the first insulating layer and the second insulating layer are formed of different insulating materials. Alternatively, it may be formed by a method in which a liquid insulating material is applied and heat treatment is performed.

(2)上記実施形態においては、銅(合金製)の金属板にスズめっきを施した材料で構成された端子金具(電線接続部)を備え、アルミニウム(合金)製の芯線を備える電線を示したが、端子金具と芯線の材料はこれに限定されない。要は、電線の芯線の材料と端子金具の材料とが相違するものであれば、本発明の効果が得られる。   (2) In the above embodiment, an electric wire provided with a terminal metal fitting (electric wire connecting portion) made of a material obtained by performing tin plating on a copper (alloy) metal plate and provided with an aluminum (alloy) core wire is shown. However, the material of the terminal fitting and the core wire is not limited to this. In short, the effect of the present invention can be obtained as long as the core wire material and the terminal fitting material are different.

(3)上記実施形態においては、端子金具の電線載置面、電線載置面の反対側の面および端面に、スズめっきを施したものを示したが、これに限定されない。例えば、めっきを施していない金属板材を用いて作製した端子金具であってもよいし、端子金具の端面にのみ、あるいは、端子金具の電線載置面およびその反対側の面のみにめっきを施したものであってもよい。   (3) In the said embodiment, although what carried out the tin plating to the electric wire mounting surface of the terminal metal fitting, the surface on the opposite side of an electric wire mounting surface, and the end surface was shown, it is not limited to this. For example, it may be a terminal fitting made of a metal plate that has not been plated, or it may be plated only on the end face of the terminal fitting, or only on the wire mounting surface of the terminal fitting and on the opposite surface. It may be what you did.

(4)上記実施形態では、芯線バレル片の接続領域に平行四辺形状をなす複数の凹部を形成したものを示したが、凹部の形状は長方形状などであってもよい。
(5)上記実施形態では、複数の凹部を打抜き加工の後に形成する方法を示したが、複数の凹部を打抜き加工の前に形成してもよいし、打抜き加工と同時に形成してもよい。
(4) In the above embodiment, the connection region of the core barrel piece is formed with a plurality of concave portions having a parallelogram shape. However, the shape of the concave portion may be rectangular.
(5) In the above embodiment, the method of forming the plurality of recesses after the punching process has been described. However, the plurality of recesses may be formed before the punching process or simultaneously with the punching process.

(6)上記実施形態では、端子金具として雌型のものを示したが、雄型のものでもよい。また、上記実施形態では相手方の端子金具を挿入可能な本体部を備える端子金具を示したが、2以上の電線を接続する電線接続部を有するもの(いわゆる「スプライス端子」)であってもよい。   (6) Although the female terminal is shown as the terminal fitting in the above embodiment, a male terminal may be used. Moreover, although the terminal metal fitting provided with the main-body part which can insert the other party metal fitting was shown in the said embodiment, what has a wire connection part which connects two or more electric wires (what is called a "splice terminal") may be used. .

(7)上記実施形態では、打抜き工程の後にめっき工程を実行する製造方法について説明したが、打抜き工程の前にめっき工程を実行してもよい。この場合、でも、打抜き工程の後に、打抜きにより形成された板材の端面にめっきを施すと電食防止効果を確実なものとすることができる。   (7) Although the manufacturing method which performs a plating process after a punching process was demonstrated in the said embodiment, you may perform a plating process before a punching process. In this case, however, if the end surface of the plate formed by punching is plated after the punching step, the effect of preventing electrolytic corrosion can be ensured.

1…板材
1A…板材の一方の面(電線載置面に相当する面)
1B…板材の他方の面(電線載置面と反対側の面の面に相当する面)
10…端子金具
23…電線接続部
23A…電線載置面
23B…電線載置面の反対側の面
23C…(電線接続部の)端面
24…絶縁被膜バレル片
25…芯線バレル片
25A…接続領域
26A…(電線接続部の)端面
27A…(電線接続部の)端面
29…絶縁性材料(絶縁性フィルム)
29A…第1絶縁層
29B…第2絶縁層
40…電線
40A…(電線の)端末
41…芯線
41A…(芯線の)端末
42…絶縁被膜
DESCRIPTION OF SYMBOLS 1 ... Plate material 1A ... One side (surface equivalent to an electric wire mounting surface) of a plate
1B ... The other surface of the plate (surface corresponding to the surface opposite to the wire placement surface)
DESCRIPTION OF SYMBOLS 10 ... Terminal metal fitting 23 ... Electric wire connection part 23A ... Electric wire mounting surface 23B ... Surface on the opposite side of electric wire mounting surface 23C ... End surface (of electric wire connection part) 24 ... Insulation coating barrel piece 25 ... Core wire barrel piece 25A ... Connection area 26A ... End surface (of the electric wire connecting portion) 27A ... End surface (of the electric wire connecting portion) 29 ... Insulating material (insulating film)
29A ... 1st insulating layer 29B ... 2nd insulating layer 40 ... Electric wire 40A ... (Electric wire) terminal 41 ... Core wire 41A ... (Core wire) terminal 42 ... Insulating coating

Claims (8)

電線を載置して電気的に接続する電線接続部を備える端子金具であって、
前記電線は、前記端子金具を構成する金属材料とは相違する金属材料からなる芯線を絶縁被膜で被覆してなり、
前記電線接続部には、前記電線の端末から露出する前記芯線に圧着される芯線バレル片が設けられ、
前記電線接続部の前記電線が載置される電線載置面のうち、前記芯線バレル片の前記電線と電気的に接続される接続領域を除く領域は、絶縁性材料からなる第1絶縁層で覆われ、
さらに、前記電線接続部の前記電線載置面の反対側の面が、絶縁性材料からなる第2絶縁層で覆われていることを特徴とする端子金具。
A terminal fitting provided with an electric wire connecting part for placing and electrically connecting electric wires,
The electric wire is formed by coating a core wire made of a metal material different from the metal material constituting the terminal fitting with an insulating film,
The wire connection part is provided with a core barrel piece to be crimped to the core wire exposed from the end of the wire,
Of the wire placement surface on which the wire of the wire connection portion is placed, a region excluding a connection region electrically connected to the wire of the core wire barrel piece is a first insulating layer made of an insulating material. Covered,
Furthermore, the terminal metal fitting characterized by the surface on the opposite side to the said electric wire mounting surface of the said electric wire connection part being covered with the 2nd insulating layer which consists of an insulating material.
前記絶縁性材料がポリブチレンテレフタレートであることを特徴とする請求項1に記載の端子金具。 The terminal fitting according to claim 1, wherein the insulating material is polybutylene terephthalate. 前記電線接続部の端面には、イオン化傾向が、前記電線接続部を構成する金属材料よりも、前記芯線を構成する金属材料に近い金属により、めっきが施されていることを特徴とする請求項1または請求項2に記載の端子金具。 The end face of the electric wire connection part is plated with a metal that has an ionization tendency closer to the metal material constituting the core wire than the metal material constituting the electric wire connection part. The terminal fitting according to claim 1 or claim 2. 前記芯線を構成する材料がアルミニウムを含む金属である一方、前記電線接続部は銅を含む金属から構成され、かつ、前記電線接続部の端面には、スズめっきが施されていることを特徴とする請求項3に記載の端子金具。 While the material constituting the core wire is a metal containing aluminum, the wire connection portion is made of a metal containing copper, and the end surface of the wire connection portion is tin-plated. The terminal fitting according to claim 3. 芯線を絶縁被膜で被覆してなる電線を載置して接続する電線接続部を備え、前記電線接続部に、前記電線の端末から露出した前記芯線を圧着して電気的に接続する芯線バレル片を設けた端子金具の製造方法であって、
前記芯線と相違する材料からなり前記端子金具を構成する金属製の板材の一方の面の、前記電線接続部に対応する部分のうち、前記芯線バレル片の前記電線と接続される接続領域に相当する部分以外の部分に、絶縁性材料からなる第1絶縁層を形成するとともに、前記板材の他方の面の前記電線接続部に対応する部分に絶縁性材料からなる第2絶縁層を形成した後に、前記第1絶縁層および前記第2絶縁層が形成された板材を所定形状に打ち抜く打抜き工程を実行し、
前記打抜き工程を実行した後の板材に、イオン化傾向が、当該板材を構成する金属材料よりも、前記芯線を構成する金属材料に近い金属をめっきするめっき工程を実行することを特徴とする端子金具の製造方法。
A core wire barrel piece comprising an electric wire connecting portion for placing and connecting an electric wire formed by coating a core wire with an insulating coating, and crimping and electrically connecting the core wire exposed from the end of the electric wire to the electric wire connecting portion. A method of manufacturing a terminal fitting provided with
Corresponding to a connection region connected to the electric wire of the core wire barrel piece among the portions corresponding to the electric wire connecting portion of one surface of the metal plate material made of a material different from the core wire and constituting the terminal fitting. After forming a first insulating layer made of an insulating material in a portion other than the portion to be formed and forming a second insulating layer made of an insulating material in a portion corresponding to the wire connecting portion on the other surface of the plate member Performing a punching step of punching a plate material on which the first insulating layer and the second insulating layer are formed into a predetermined shape;
A terminal fitting characterized by performing a plating step of plating a metal closer to the metal material constituting the core wire than the metal material constituting the plate material on the plate material after performing the punching step. Manufacturing method.
前記めっき工程を、前記打抜き工程を実行した後の板材の端面に対して実行することを特徴とする請求項5に記載の端子金具の製造方法。 6. The method of manufacturing a terminal fitting according to claim 5, wherein the plating step is performed on an end face of the plate after the punching step is performed. 前記絶縁性材料がポリブチレンテレフタレート製のフィルムであることを特徴とする請求項5または請求項6に記載の端子金具の製造方法。 The method for manufacturing a terminal fitting according to claim 5 or 6, wherein the insulating material is a film made of polybutylene terephthalate. 前記芯線を構成する材料がアルミニウムを含む金属である一方、前記板材を構成する金属材料は銅を含む金属から構成され、かつ、前記めっき工程において前記板材にスズめっきを施すことを特徴とする請求項5ないし請求項7のいずれか一項に記載の端子金具の製造方法。 The material constituting the core wire is a metal containing aluminum, while the metal material constituting the plate material is made of a metal containing copper, and tin plating is performed on the plate material in the plating step. The manufacturing method of the terminal metal fitting as described in any one of Claim 5 thru | or 7.
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