JP2021051849A - Electric wire with terminal and method for manufacturing electric wire with terminal - Google Patents

Electric wire with terminal and method for manufacturing electric wire with terminal Download PDF

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JP2021051849A
JP2021051849A JP2019172631A JP2019172631A JP2021051849A JP 2021051849 A JP2021051849 A JP 2021051849A JP 2019172631 A JP2019172631 A JP 2019172631A JP 2019172631 A JP2019172631 A JP 2019172631A JP 2021051849 A JP2021051849 A JP 2021051849A
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terminal
electric wire
wire
crimping
core wire
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JP7345978B2 (en
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和彦 吉江
Kazuhiko Yoshie
和彦 吉江
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Yazaki Corp
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Abstract

To provide an electric wire with a terminal in which an oxide film between element wires can be destructed/removed.SOLUTION: An electric wire 1 with a terminal includes a round electric wire 2 having a core wire portion 22 consisting of a plurality of element wires 21, and a terminal 3 connected to the terminal of the electric wire 2. The terminal 3 integrally has a crimping portion 33 crimped to the core wire portion 22 and an insertion portion 4 inserted between the element wires 21. A conductive paste containing conductive powder is coated on the insertion portion 4, and after the insertion portion 4 is inserted into the center of the core wire portion 22, a pair of crimping pieces 32 are crimped to crimp the crimping portion 33 to the core wire portion 22, thereby manufacturing the electric wire 1 with a terminal.SELECTED DRAWING: Figure 1

Description

本発明は、電線の端末に端子が接続された端子付き電線及びその製造方法に関するものである。 The present invention relates to a terminal-equipped electric wire having terminals connected to the terminal of the electric wire and a method for manufacturing the same.

従来より、電線の端末に圧着端子が接続された「端子付き電線」が知られている。図２は、従来の端子付き電線の分解図である（特許文献１を参照）。 Conventionally, a "wire with a terminal" in which a crimp terminal is connected to a terminal of an electric wire has been known. FIG. 2 is an exploded view of a conventional electric wire with a terminal (see Patent Document 1).

図２に示す電線３１０は、端末部分の被覆３１１が剥ぎ取られて芯線部３１３が露出している。この芯線部３１３は、アルミニウム製の素線３１４が複数本撚り合わされ形成されたものである。芯線部３１３の表面には硬質粉体３１５が付着されている。この硬質粉体３１５は、芯線部３１３の表面に形成されている酸化被膜を破壊・除去するためのものである。 In the electric wire 310 shown in FIG. 2, the coating 311 of the terminal portion is stripped off to expose the core wire portion 313. The core wire portion 313 is formed by twisting a plurality of aluminum strands 314. Hard powder 315 is attached to the surface of the core wire portion 313. The hard powder 315 is for destroying and removing the oxide film formed on the surface of the core wire portion 313.

図２に示す圧着端子３１６は、貫通孔３１９が形成された締結部３１７と、芯線部３１３に圧着される圧着部３１８と、を備えている。圧着部３１８は、基底部３２０と、一対の圧着片３２１ａ，３２１ｂと、を備えている。これら基底部３２０及び一対の圧着片３２１ａ，３２１ｂの内表面には、圧着される電線３１０の長手方向と直交する方向に延びた溝部３２２が複数形成されている。 The crimp terminal 316 shown in FIG. 2 includes a fastening portion 317 formed with a through hole 319 and a crimp portion 318 crimped to the core wire portion 313. The crimping portion 318 includes a base portion 320 and a pair of crimping pieces 321a and 321b. A plurality of groove portions 322 extending in a direction orthogonal to the longitudinal direction of the electric wire 310 to be crimped are formed on the inner surfaces of the base portion 320 and the pair of crimping pieces 321a and 321b.

上記芯線部３１３は、予め硬質粉体３１５が付着された状態で基底部３２０に載置され、一対の圧着片３２１ａ，３２１ｂが加締められることで圧着部３１８が圧着される。また、この圧着時に硬質粉体３１５が芯線部３１３表面の酸化被膜に食い込んで酸化被膜が破壊・除去される。そしてその部分において新たに露出された芯線部３１３の清浄な金属面と圧着端子３１６とが接触する。 The core wire portion 313 is placed on the base portion 320 with the hard powder 315 attached in advance, and the crimping portion 318 is crimped by crimping the pair of crimping pieces 321a and 321b. Further, during this crimping, the hard powder 315 bites into the oxide film on the surface of the core wire portion 313, and the oxide film is destroyed / removed. Then, in that portion, the clean metal surface of the newly exposed core wire portion 313 comes into contact with the crimp terminal 316.

特開２００３−２４３０５８号公報Japanese Unexamined Patent Publication No. 2003-243058

図２に示した従来の端子付き電線は、芯線部３１３表面の酸化被膜については硬質粉体３１５によって破壊・除去されるものの、芯線部３１３の中心部に位置する素線３１４間の酸化被膜までは破壊・除去することが難しいという問題があった。 In the conventional electric wire with a terminal shown in FIG. 2, the oxide film on the surface of the core wire portion 313 is destroyed and removed by the hard powder 315, but the oxide film between the strands 314 located at the center of the core wire portion 313 is reached. Had a problem that it was difficult to destroy and remove.

なお、電線径が太くなれば、圧着部に直接接触して接続する素線（即ち芯線部表面に位置する素線）よりも、他の素線を介して圧着部に接続する素線の方が多くなるため、太物電線に端子を圧着する場合は、素線間の酸化被膜対策が特に重要であった。 If the wire diameter becomes thicker, the wire that connects to the crimping part via another wire is better than the wire that connects directly to the crimping part (that is, the wire that is located on the surface of the core wire). Therefore, when crimping a terminal to a thick electric wire, it was particularly important to take measures against an oxide film between the strands.

上記問題を解決するため、本発明は、素線間の酸化被膜を破壊・除去することが可能な端子付き電線及びその製造方法を提供することを目的とする。 In order to solve the above problems, it is an object of the present invention to provide an electric wire with a terminal capable of destroying and removing an oxide film between the strands and a method for manufacturing the same.

本発明の端子付き電線は、複数の素線から成る芯線部を有する電線と、前記芯線部に圧着された圧着部を有する端子と、導電材料で構成されかつ前記電線の長手方向に延び、前記素線間に挿入された挿入部と、を備えたことを特徴とする。 The electric wire with a terminal of the present invention is composed of an electric wire having a core wire portion composed of a plurality of strands, a terminal having a crimping portion crimped to the core wire portion, a conductive material, and extends in the longitudinal direction of the electric wire. It is characterized by having an insertion portion inserted between the strands.

本発明の端子付き電線の製造方法は、複数の素線から成る芯線部を有する電線と、該電線の端末に接続された端子と、を備えた端子付き電線の製造方法であって、前記端子が、前記芯線部に圧着される圧着部と、前記電線の長手方向に延び、前記素線間に挿入される挿入部と、を有し、前記挿入部に導電性粉体を含んだ導電性ペーストを塗布し、該挿入部を前記素線間に挿入した後、前記圧着部を加締めて前記芯線部に圧着することを特徴とする。 The method for manufacturing an electric wire with a terminal of the present invention is a method for manufacturing an electric wire with a terminal including an electric wire having a core wire portion composed of a plurality of strands and a terminal connected to the terminal of the electric wire. However, it has a crimping portion that is crimped to the core wire portion and an insertion portion that extends in the longitudinal direction of the electric wire and is inserted between the strands. After applying the paste and inserting the insertion portion between the strands, the crimping portion is crimped and crimped to the core wire portion.

本発明によれば、素線間に挿入部が挿入された状態の芯線部に圧着部を圧着することで、素線間の酸化被膜を破壊・除去することができる。 According to the present invention, by crimping the crimping portion to the core wire portion in which the insertion portion is inserted between the strands, the oxide film between the strands can be destroyed and removed.

本発明の一実施形態にかかる端子付き電線の分解図である。It is an exploded view of the electric wire with a terminal which concerns on one Embodiment of this invention. 従来の端子付き電線の分解図である。It is an exploded view of the conventional electric wire with a terminal.

本発明の一実施形態にかかる端子付き電線及びその製造方法について、図１を参照して説明する。図１は、本発明の一実施形態にかかる端子付き電線の分解図である。 An electric wire with a terminal and a method for manufacturing the same according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is an exploded view of an electric wire with a terminal according to an embodiment of the present invention.

図１に示す端子付き電線１は、電線２と、電線２の端末に接続された端子３と、電線２の素線２１間に挿入されることとなる挿入部４と、素線２１間における挿入部４の周囲に介在した導電性粉体と、を備えている。 The electric wire 1 with a terminal shown in FIG. 1 is between the electric wire 2, the terminal 3 connected to the terminal of the electric wire 2, the insertion portion 4 to be inserted between the wire 21 of the wire 2, and the wire 21. It includes a conductive powder interposed around the insertion portion 4.

電線２は、複数の素線２１から成る芯線部２２と、この芯線部２２を覆った被覆２３と、を有する丸型電線である。また、本例では、アルミニウム又はアルミニウム合金から成る素線２１を用いている。この電線２は、端末部分の被覆２３が剥ぎ取られて芯線部２２が露出している。 The electric wire 2 is a round electric wire having a core wire portion 22 composed of a plurality of strands 21 and a coating 23 covering the core wire portion 22. Further, in this example, a wire 21 made of aluminum or an aluminum alloy is used. In this electric wire 2, the coating 23 of the terminal portion is stripped off to expose the core wire portion 22.

端子３は、金属板にプレス加工等が施されて得られるものであり、芯線部２２に圧着される圧着部３３と、平型接続部３７と、挿入部４と、を一体に有している。即ち本例では、挿入部４が端子３の一部として形成されている。 The terminal 3 is obtained by pressing a metal plate or the like, and integrally has a crimping portion 33 crimped to the core wire portion 22, a flat connecting portion 37, and an inserting portion 4. There is. That is, in this example, the insertion portion 4 is formed as a part of the terminal 3.

圧着部３３は、基底部３１と、基底部３１の幅方向両端部に連なった一対の圧着片３２と、を備えている。これら基底部３１及び一対の圧着片３２の内表面には、接続される電線２の長手方向と直交する方向に延びた溝部３４が複数形成されている（当該構成は、一般的にセレーションと呼ばれている。）。 The crimping portion 33 includes a base portion 31 and a pair of crimping pieces 32 connected to both ends in the width direction of the base portion 31. A plurality of groove portions 34 extending in a direction orthogonal to the longitudinal direction of the electric wire 2 to be connected are formed on the inner surface of the base portion 31 and the pair of crimping pieces 32 (the configuration is generally called serration). It is.).

平型接続部３７は、基底部３１の長手方向一端部から平板状に延びている。平型接続部３７には円形の貫通孔３６が形成されている。 The flat connecting portion 37 extends in a flat plate shape from one end in the longitudinal direction of the base portion 31. A circular through hole 36 is formed in the flat connecting portion 37.

挿入部４は、平型接続部３７の一部が切り起され、一対の圧着片３２間において基底部３１と平行になるように曲げられて形成されている。挿入部４は、接続される電線２の長手方向に延びた四角柱状に形成されており、接続される電線２の長手方向と交差する先端面４１を有している。 The insertion portion 4 is formed by cutting a part of the flat connecting portion 37 and bending it between the pair of crimping pieces 32 so as to be parallel to the base portion 31. The insertion portion 4 is formed in a square columnar shape extending in the longitudinal direction of the electric wire 2 to be connected, and has a tip surface 41 intersecting the longitudinal direction of the electric wire 2 to be connected.

上記導電性粉体は、端子３の圧着前に挿入部４に塗布される導電性ペーストに含まれるものである。この導電性ペーストは、硬質の金属粉から成る導電性粉体と有機溶剤とを含んでいる。 The conductive powder is contained in the conductive paste applied to the insertion portion 4 before crimping the terminal 3. This conductive paste contains a conductive powder composed of a hard metal powder and an organic solvent.

上記端子付き電線１は、以下の工程を経て製造される。まず、挿入部４に上記導電性ペーストを塗布する。続いて、この挿入部４を芯線部２２の中心に挿入する。そして、一対の圧着片３２を加締めることにより圧着部３３を芯線部２２に圧着する。なお、圧着部３３は、従来の圧着設備で圧着可能である。 The electric wire 1 with a terminal is manufactured through the following steps. First, the conductive paste is applied to the insertion portion 4. Subsequently, the insertion portion 4 is inserted into the center of the core wire portion 22. Then, the crimping portion 33 is crimped to the core wire portion 22 by crimping the pair of crimping pieces 32. The crimping portion 33 can be crimped with a conventional crimping facility.

上述した圧着部３３の圧着時には、芯線部２２の中心に挿入された挿入部４のエッジが複数の素線２１の酸化被膜に食い込んでこれら酸化被膜が破壊・除去される。そして、その部分において新たに露出された素線２１の清浄な金属面と挿入部４とが接触する。また、これと同時に、挿入部４に塗布された導電性ペーストに含まれる導電性粉体が素線２１間に拡がり、これら導電性粉体が複数の素線２１の酸化被膜に食い込んでこれら酸化被膜が破壊・除去される。そして、新たに露出された各素線２１の清浄な金属面同士が接触する。さらに、圧着部３３の内表面において、複数の溝部３４のエッジが複数の素線２１の酸化被膜に食い込んでこれら酸化被膜が破壊・除去される。そして、その部分において新たに露出された素線２１の清浄な金属面と圧着部３３内表面とが接触する。 At the time of crimping the crimping portion 33 described above, the edge of the inserting portion 4 inserted in the center of the core wire portion 22 bites into the oxide film of the plurality of strands 21, and these oxide film are destroyed and removed. Then, the clean metal surface of the newly exposed wire 21 and the insertion portion 4 come into contact with each other at that portion. At the same time, the conductive powder contained in the conductive paste applied to the insertion portion 4 spreads between the strands 21, and the conductive powder bites into the oxide film of the plurality of strands 21 to oxidize them. The coating is destroyed and removed. Then, the clean metal surfaces of the newly exposed strands 21 come into contact with each other. Further, on the inner surface of the crimping portion 33, the edges of the plurality of groove portions 34 bite into the oxide coatings of the plurality of strands 21, and these oxide coatings are destroyed and removed. Then, the clean metal surface of the newly exposed wire 21 and the inner surface of the crimping portion 33 come into contact with each other at that portion.

このように、端子付き電線１は、挿入部４によって芯線部２２の中心部に位置する素線２１の酸化被膜を破壊・除去できる上、挿入部４によって中心部の素線２１との導通をとることができる。また、本例の挿入部４は、先端面４１を構成する各エッジが素線２１の酸化被膜に食い込み易く、酸化被膜の破壊・除去に特に好適な形状となっている。 In this way, the electric wire 1 with a terminal can destroy and remove the oxide film of the wire 21 located at the center of the core wire portion 22 by the insertion portion 4, and the insertion portion 4 makes the wire conduction with the wire 21 at the center portion. Can be taken. Further, the insertion portion 4 of this example has a shape particularly suitable for breaking / removing the oxide film because each edge constituting the tip surface 41 easily bites into the oxide film of the wire 21.

また、端子付き電線１は、挿入部４に塗布された導電性ペーストに含まれる導電性粉体によって芯線部２２の中心部に位置する素線２１の酸化被膜を破壊・除去でき、中心部の素線２１−素線２１間の抵抗値を低くできる。また、本例のように導電性ペーストが塗布された挿入部４を芯線部２２の中心に挿入し、圧着部３３を加圧することで、少量の導電性ペーストで酸化被膜の破壊・除去に大きな効果が得られる。 Further, the electric wire 1 with terminals can destroy and remove the oxide film of the wire 21 located at the center of the core wire portion 22 by the conductive powder contained in the conductive paste applied to the insertion portion 4, and the central portion of the electric wire 1 has a terminal. The resistance value between the strands 21 and the strands 21 can be lowered. Further, as in this example, the insertion portion 4 coated with the conductive paste is inserted into the center of the core wire portion 22, and the pressure-bonding portion 33 is pressed, so that a small amount of the conductive paste is sufficient for breaking and removing the oxide film. The effect is obtained.

上述した実施形態では、アルミニウム製の素線２１を用いていたが、本発明においては素線の材質はアルミニウムに限定されない。アルミニウムは他の金属よりも酸化被膜が形成され易いため、アルミ電線に本発明を適用することは特に有効であるが、酸化被膜は他の金属素線においても生じるものであり、アルミ電線以外の電線に本発明を適用しても勿論よい。 In the above-described embodiment, the wire 21 made of aluminum is used, but in the present invention, the material of the wire is not limited to aluminum. Since aluminum is more likely to form an oxide film than other metals, it is particularly effective to apply the present invention to aluminum electric wires, but oxide films also occur on other metal strands, other than aluminum electric wires. Of course, the present invention may be applied to an electric wire.

上述した実施形態では、端子３が挿入部４を一つのみ有していたが、本発明においては端子が挿入部を複数有していてもよい。また、挿入部は端子と別体で形成されていてもよい。さらに、挿入部は、先端部を先細形状にしてもよい。 In the above-described embodiment, the terminal 3 has only one insertion portion 4, but in the present invention, the terminal may have a plurality of insertion portions. Further, the insertion portion may be formed separately from the terminal. Further, the insertion portion may have a tapered tip portion.

上述した実施形態では、端子３の圧着前に挿入部４に導電性ペーストを塗布していたが、本発明においては導電性ペーストを使用せずに端子３を圧着してもよい。その場合においても、圧着部３３の圧着時には、芯線部２２の中心に挿入された挿入部４のエッジが複数の素線２１の酸化被膜に食い込んでこれら酸化被膜が破壊・除去される。 In the above-described embodiment, the conductive paste is applied to the insertion portion 4 before crimping the terminal 3, but in the present invention, the terminal 3 may be crimped without using the conductive paste. Even in that case, when the crimping portion 33 is crimped, the edge of the insertion portion 4 inserted in the center of the core wire portion 22 bites into the oxide film of the plurality of strands 21, and these oxide films are destroyed and removed.

上述した実施形態では、端子３の圧着前に挿入部４に導電性ペーストを塗布していたが、本発明においては、圧着部３３の内表面に導電性ペーストを塗布してもよいし、芯線部２２の表面に導電性ペーストを塗布してもよい。また、挿入部４、圧着部３３内表面、芯線部２２表面、の全てに導電性ペーストを塗布してもよい。 In the above-described embodiment, the conductive paste is applied to the insertion portion 4 before the crimping portion of the terminal 3, but in the present invention, the conductive paste may be applied to the inner surface of the crimping portion 33, or the core wire. A conductive paste may be applied to the surface of the portion 22. Further, the conductive paste may be applied to all of the insertion portion 4, the inner surface of the crimping portion 33, and the surface of the core wire portion 22.

なお、前述した実施形態は本発明の代表的な形態を示したに過ぎず、本発明は、この実施形態に限定されるものではない。即ち、本発明の骨子を逸脱しない範囲で種々変形して実施することができる。かかる変形によってもなお本発明の構成を具備する限り、勿論、本発明の範疇に含まれるものである。 It should be noted that the above-described embodiment merely shows a typical embodiment of the present invention, and the present invention is not limited to this embodiment. That is, it can be modified in various ways without departing from the gist of the present invention. As long as the configuration of the present invention is still provided by such modification, it is, of course, included in the category of the present invention.

１ 端子付き電線
２ 電線
３ 端子
４ 挿入部
２１ 素線
２２ 芯線部
３３ 圧着部 1 Electric wire with terminal 2 Electric wire 3 Terminal 4 Insertion part 21 Wire 22 Core wire 33 Crimping part

Claims (5)

複数の素線から成る芯線部を有する電線と、
前記芯線部に圧着された圧着部を有する端子と、
導電材料で構成されかつ前記電線の長手方向に延び、前記素線間に挿入された挿入部と、を備えた
ことを特徴とする端子付き電線。 An electric wire having a core wire composed of a plurality of strands and
A terminal having a crimping portion crimped to the core wire portion and
An electric wire with a terminal, which is made of a conductive material, extends in the longitudinal direction of the electric wire, and has an insertion portion inserted between the strands. 前記素線間における前記挿入部の周囲に導電性粉体が介在している
ことを特徴とする請求項１に記載の端子付き電線。 The electric wire with a terminal according to claim 1, wherein the conductive powder is interposed around the insertion portion between the strands. 前記挿入部が前記端子の一部として形成されている
ことを特徴とする請求項１又は２に記載の端子付き電線。 The electric wire with a terminal according to claim 1 or 2, wherein the insertion portion is formed as a part of the terminal. 前記挿入部が、前記電線の長手方向と交差する先端面を有している
ことを特徴とする請求項１〜３の何れか１項に記載の端子付き電線。 The electric wire with a terminal according to any one of claims 1 to 3, wherein the insertion portion has a tip surface that intersects the longitudinal direction of the electric wire. 複数の素線から成る芯線部を有する電線と、該電線の端末に接続された端子と、を備えた端子付き電線の製造方法であって、
前記端子が、前記芯線部に圧着される圧着部と、前記電線の長手方向に延び、前記素線間に挿入される挿入部と、を有し、
前記挿入部に導電性粉体を含んだ導電性ペーストを塗布し、該挿入部を前記素線間に挿入した後、前記圧着部を加締めて前記芯線部に圧着する
ことを特徴とする端子付き電線の製造方法。 A method for manufacturing an electric wire with a terminal, which comprises an electric wire having a core wire portion composed of a plurality of strands and a terminal connected to the terminal of the electric wire.
The terminal has a crimping portion that is crimped to the core wire portion and an insertion portion that extends in the longitudinal direction of the electric wire and is inserted between the strands.
A terminal characterized in that a conductive paste containing a conductive powder is applied to the insertion portion, the insertion portion is inserted between the strands, and then the crimping portion is crimped and crimped to the core wire portion. Manufacturing method of attached electric wire.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05152011A (en) * 1991-11-26 1993-06-18 Sumitomo Wiring Syst Ltd Crimp-style terminal
JPH0648173U (en) * 1992-12-04 1994-06-28 矢崎総業株式会社 Crimp structure for terminal fittings
JP2003243058A (en) * 2002-02-19 2003-08-29 Auto Network Gijutsu Kenkyusho:Kk Pressure attaching method of aluminum electric wire to terminal
JP2010067577A (en) * 2008-09-12 2010-03-25 Sumitomo Wiring Syst Ltd Terminal fitting, and electric cable with terminal fitting
JP2010140694A (en) * 2008-12-10 2010-06-24 Yazaki Corp Crimping terminal
JP2019009101A (en) * 2017-06-22 2019-01-17 日立金属株式会社 Terminal-equipped wire

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05152011A (en) * 1991-11-26 1993-06-18 Sumitomo Wiring Syst Ltd Crimp-style terminal
JPH0648173U (en) * 1992-12-04 1994-06-28 矢崎総業株式会社 Crimp structure for terminal fittings
JP2003243058A (en) * 2002-02-19 2003-08-29 Auto Network Gijutsu Kenkyusho:Kk Pressure attaching method of aluminum electric wire to terminal
JP2010067577A (en) * 2008-09-12 2010-03-25 Sumitomo Wiring Syst Ltd Terminal fitting, and electric cable with terminal fitting
JP2010140694A (en) * 2008-12-10 2010-06-24 Yazaki Corp Crimping terminal
JP2019009101A (en) * 2017-06-22 2019-01-17 日立金属株式会社 Terminal-equipped wire

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