JP2013137879A - Electric wire with terminal and manufacturing method of the same - Google Patents

Electric wire with terminal and manufacturing method of the same Download PDF

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Publication number
JP2013137879A
JP2013137879A JP2011287241A JP2011287241A JP2013137879A JP 2013137879 A JP2013137879 A JP 2013137879A JP 2011287241 A JP2011287241 A JP 2011287241A JP 2011287241 A JP2011287241 A JP 2011287241A JP 2013137879 A JP2013137879 A JP 2013137879A
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Prior art keywords
terminal
electric wire
conductor
barrel portion
barrel
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Kenji Miyamoto
賢次 宮本
Tomoya Ota
智也 太田
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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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Priority to JP2011287241A priority Critical patent/JP2013137879A/en
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Abstract

PROBLEM TO BE SOLVED: To provide an electric wire with a terminal in which connection reliability with the terminal is improved, and to provide a manufacturing method of the electric wire with the terminal.SOLUTION: An electric wire with a terminal 10 includes: an electric wire 11 having a conductor 12 and an insulation coating 13 covering the conductor 12; and a terminal 20 having a barrel part 21 crimped to the exposed conductor 12 exposed at an end of the electric wire 11. A pressure member 30, formed by a conductive material and pressing the barrel part 21 against the exposed conductor 12, is penetrated through and attached to the barrel part 21.

Description

本発明は、端子付き電線およびその製造方法に関する。   The present invention relates to an electric wire with a terminal and a method for manufacturing the same.

導体を絶縁被覆で被覆するとともに、端末において導体が露出する電線と、この電線の端末に接続される端子と、を備える端子付き電線としては、例えば、特許文献１に記載のものなどが知られている。   As an electric wire with a terminal provided with an electric wire from which the conductor is exposed at the terminal and a terminal connected to the terminal of the electric wire while covering the conductor with an insulating coating, for example, the one described in Patent Document 1 is known. ing.

特許文献１に記載の端子付き電線においては、電線の端末において露出する導体に端子のワイヤーバレルが圧着されて電気的に接続されるようになっている。   In the electric wire with a terminal described in Patent Document 1, a wire barrel of a terminal is crimped and electrically connected to a conductor exposed at the end of the electric wire.

実開平５−７２０５３号公報Japanese Utility Model Publication No. 5-72053

上述したような端子付き電線では、クリープ現象や振動等の影響により、圧着したバレルが（圧着前の状態に）戻って、バレルと電線の露出導体との接触荷重が低下することで、接続状態が悪化し接続抵抗が増大することがある。   In the electric wire with terminal as described above, the crimped barrel returns to the state before the crimping due to the effects of creep phenomenon, vibration, etc., and the contact load between the barrel and the exposed conductor of the electric wire decreases, so that the connection state May deteriorate and the connection resistance may increase.

また、電線の導体を構成する素線のうち、端子と接触しない素線は、端子と電気的に接続されないことがある。さらに、素線の表面に金属酸化膜が形成されている場合には、素線が端子と接触していたとしても、接触抵抗が大きくなるという問題がある。   In addition, among the strands constituting the conductor of the electric wire, the strand that does not contact the terminal may not be electrically connected to the terminal. Furthermore, when a metal oxide film is formed on the surface of the strand, there is a problem that the contact resistance increases even if the strand is in contact with the terminal.

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、端子との接続信頼性を向上させた端子付き電線およびその製造方法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 electric wire with a terminal which improved the connection reliability with a terminal, and its manufacturing method.

上記課題を解決するものとして本発明は、導体および前記導体を覆う絶縁被覆を有する電線と、前記電線の端末において露出させた露出導体に圧着されるバレル部を有する端子と、を備えた端子付き電線であって、前記バレル部には、導電性材料からなり、前記バレル部を前記露出導体に押しつける加圧部材が前記バレル部を貫通して取り付けられている端子付き電線である。   In order to solve the above problems, the present invention is provided with a terminal including: a conductor and an electric wire having an insulating coating covering the conductor; and a terminal having a barrel portion that is crimped to an exposed conductor exposed at an end of the electric wire. An electric wire, wherein the barrel portion is made of a conductive material, and a pressure member that presses the barrel portion against the exposed conductor is attached through the barrel portion.

また、本発明は、導体および前記導体を覆う絶縁被覆を有する電線と、前記電線の端末において露出させた露出導体に圧着されるバレル部を有する端子と、を備えた端子付き電線の製造方法であって、前記バレル部に、導電性材料からなり、当該バレル部を前記露出導体に押しつけるための加圧部材を貫通させて取り付ける取付工程を経た後、前記バレル部を前記露出導体に圧着する圧着工程を実行し、前記圧着工程を実行した後、前記加圧部材により前記バレル部を前記露出導体に押しつける加圧工程を実行する端子付き電線の製造方法である。   Moreover, this invention is a manufacturing method of the electric wire with a terminal provided with the electric wire which has the insulation coating which covers the conductor and the said conductor, and the terminal which has a barrel part crimped | bonded to the exposed conductor exposed at the terminal of the said electric wire. In addition, the barrel portion is made of a conductive material, and after being subjected to an attaching step for attaching a pressure member for pressing the barrel portion against the exposed conductor, the pressure bonding for crimping the barrel portion to the exposed conductor. It is a manufacturing method of the electric wire with a terminal which performs a pressurization process which presses the barrel part to the exposed conductor with the pressurization member, after performing a process and performing the above-mentioned crimping process.

本発明においては、バレル部に取り付けられている導電性材料からなる加圧部材により、バレル部が露出導体に押しつけられるので、バレル部と露出導体との接触荷重の低下を防止することができる。   In the present invention, since the barrel portion is pressed against the exposed conductor by the pressurizing member made of a conductive material attached to the barrel portion, it is possible to prevent a reduction in contact load between the barrel portion and the exposed conductor.

また、電線の導体を構成する素線のうち、端子と接触しない素線は、端子と電気的に接続されないことがあるが、本発明においては、バレル部を加圧部材が貫通して取り付けられているので、加圧部材と素線とが接触するようになっており、加圧部材と素線の接触により素線の表面に形成される金属酸化膜の破壊も促進される。   Further, among the strands constituting the conductor of the electric wire, the strand that does not contact the terminal may not be electrically connected to the terminal, but in the present invention, the pressure member is attached through the barrel portion. Therefore, the pressure member and the strand come into contact with each other, and the destruction of the metal oxide film formed on the surface of the strand is promoted by the contact between the pressure member and the strand.

つまり、本発明によれば、加圧部材によりバレル部と露出導体との接触荷重の低下が防止されるうえに、導電性材料からなる加圧部材と導体を構成する素線との接触により電気的な接続を良好なものとすることができるので、端子との接続信頼性を向上させた端子付き電線およびその製造方法を提供することができる。   That is, according to the present invention, the pressurization member prevents the contact load between the barrel portion and the exposed conductor from being lowered, and the contact between the pressurization member made of a conductive material and the element wire constituting the conductor causes electric power. Therefore, it is possible to provide a terminal-attached electric wire with improved connection reliability with the terminal and a method for manufacturing the electric wire.

本発明は、以下の構成としてもよい。
前記加圧部材は、前記バレル部を貫通するボルトと、前記ボルトをバレル部に対して固定するナットとを備えていてもよい。
このような構成とすると、バレル部にボルトを貫通させ、ナット締めすることによりバレル部を露出導体に押しつけることができるので、加圧部材を簡易な構成とすることができる。 The present invention may have the following configurations.
The pressurizing member may include a bolt that penetrates the barrel portion and a nut that fixes the bolt to the barrel portion.
With such a configuration, the barrel portion can be pressed against the exposed conductor by passing the bolt through the barrel portion and tightening the nut, so that the pressure member can have a simple configuration.

前記加圧部材とともに前記バレル部を前記露出導体に押しつける加圧補助板を備えていてもよい。   A pressure auxiliary plate that presses the barrel portion against the exposed conductor together with the pressure member may be provided.

前記取付工程において、前記加圧部材とともに前記バレル部を前記露出導体に押しつける加圧補助板を、前記バレル部の外側に配置してもよい。
例えば、ボルトとナットのみを備える加圧部材をバレル部に取り付けて加圧すると、強い力で加圧することにより加圧部材がバレル部に食い込むことがあるが、上記のような構成とすると加圧補助板により加圧部材がバレル部に食い込むのを防止することができる。 In the attaching step, a pressure auxiliary plate that presses the barrel portion against the exposed conductor together with the pressure member may be disposed outside the barrel portion.
For example, when a pressure member having only bolts and nuts is attached to the barrel portion and pressed, the pressure member may bite into the barrel portion by applying a strong force. The auxiliary plate can prevent the pressing member from biting into the barrel portion.

前記バレル部の前記加圧補助板が配置されていない部分が、前記露出導体側に凹んでいてもよい。
前記圧着工程において、前記バレル部の前記加圧補助板が配置されていない部分を圧着して、前記露出導体側に凹ませてもよい。
上記のような構成とすると、バレル部が露出導体側に食い込むことで導体を構成する素線の表面の金属酸化膜の破壊が促進される。 A portion of the barrel portion where the auxiliary pressure plate is not disposed may be recessed toward the exposed conductor.
In the crimping step, a portion of the barrel portion where the auxiliary pressure plate is not disposed may be crimped and recessed on the exposed conductor side.
If it is set as the above structures, destruction of the metal oxide film on the surface of the strand which comprises a conductor will be accelerated | stimulated because a barrel part bites into the exposed conductor side.

前記導体がアルミニウムまたはアルミニウム合金製の素線を複数本撚り合わせた撚り線からなる構成であってもよい。   The conductor may be composed of a stranded wire in which a plurality of strands made of aluminum or an aluminum alloy are twisted together.

アルミニウムまたはアルミニウム合金製の導体を備える電線では、端子との熱膨張率の差が大きいため、クリープ現象による影響を受けやすく接続状態が悪化しやすいという問題があるうえに、素線の表面に、硬い酸化アルミニウム膜が形成されやすく接触抵抗が上昇するという問題があった。そこで、上記のような構成とするとアルミニウムまたはアルミニウム合金製の導体を備える電線において、、バレル部と露出導体との接触荷重の低下を防止できるとともに、加圧部材と素線の接触により素線の表面に形成される金属酸化膜の破壊が促進されるので、端子との接続信頼性を向上させることができる。   In electric wires with conductors made of aluminum or aluminum alloy, the difference in thermal expansion coefficient with the terminal is large, so there is a problem that the connection state is likely to be affected easily by the creep phenomenon, and on the surface of the strands, There is a problem that a hard aluminum oxide film is easily formed and the contact resistance increases. Therefore, in the electric wire including the conductor made of aluminum or aluminum alloy with the above-described configuration, it is possible to prevent the contact load between the barrel portion and the exposed conductor from being lowered, and the contact between the pressing member and the strand makes the strand of the strand. Since the destruction of the metal oxide film formed on the surface is promoted, the connection reliability with the terminal can be improved.

前記加圧部材は、前記端子を構成する金属材料と同じ金属を含んでいてもよい。
このような構成とすると、加圧部材と端子（バレル部）とが接触する部分において、異種金属の接触する部分に発生する腐食（電食）が生じにくくなる。 The pressurizing member may include the same metal as the metal material constituting the terminal.
With such a configuration, corrosion (electric corrosion) that occurs at the portion where the dissimilar metal contacts is less likely to occur at the portion where the pressure member and the terminal (barrel portion) contact.

本発明によれば、端子との接続信頼性を向上させた端子付き電線およびその製造方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the electric wire with a terminal which improved the connection reliability with a terminal, and its manufacturing method can be provided.

実施形態１の端子付き電線の斜視図The perspective view of the electric wire with a terminal of Embodiment 1 図１とは相違する方向から示した端子付き電線の斜視図The perspective view of the electric wire with a terminal shown from the direction different from FIG. 端子付き電線の側面図Side view of electric wire with terminal 長手方向における端子付き電線の断面図Cross section of a wire with terminal in the longitudinal direction バレル部における端子付き電線の断面図Cross section of wire with terminal at barrel 電線における端子付き電線の断面図Cross section of electric wire with terminal in electric wire バレル部の分解斜視図Exploded perspective view of barrel part 加圧部材を取り付けた（取付工程を経た後の）端子の斜視図A perspective view of a terminal with a pressure member attached (after an attachment process) 加圧部材を取り付けた端子の側面図Side view of terminal with pressure member attached 加圧部材を取り付けた端子の正面図Front view of terminal with pressure member attached バレル部に電線を配置する様子を示す斜視図The perspective view which shows a mode that an electric wire is arrange | positioned to a barrel part. バレル部内に露出導体を挿入した様子を示す斜視図The perspective view which shows a mode that the exposed conductor was inserted in the barrel part 露出導体を挿入した端子を圧着用治具に配置した様子を示す斜視図The perspective view which shows a mode that the terminal which inserted the exposed conductor has been arrange | positioned to the jig | tool for crimping | compression-bonding 図１３の断面図Sectional view of FIG. 圧着工程を実行する様子を示す斜視図The perspective view which shows a mode that a crimping | compression-bonding process is performed. 図１５の断面図Sectional view of FIG. 実施形態２の端子付き電線の斜視図The perspective view of the electric wire with a terminal of Embodiment 2 他の実施形態で説明する端子付き電線の斜視図The perspective view of the electric wire with a terminal explained in other embodiments

＜実施形態１＞
実施形態１の端子付き電線１０を図１ないし図１６によって説明する。実施形態１の端子付き電線１０は、図１に示すように、２本の電線１１と各電線１１の端末において露出する導体１２（露出導体１２）が接続される筒状のバレル部２１を有する端子２０とからなる。以下の説明において、上下方向については、図３を基準とし、前後方向については、図３の左方を前方、右方を後方として説明する。 <Embodiment 1>
The electric wire 10 with a terminal of Embodiment 1 is demonstrated with reference to FIG. 1 thru | or FIG. The electric wire 10 with a terminal of Embodiment 1 has the cylindrical barrel part 21 to which the conductor 12 (exposed conductor 12) exposed in the terminal of each electric wire 11 and the two electric wires 11 is connected, as shown in FIG. Terminal 20. In the following description, the vertical direction will be described with reference to FIG. 3, and the front-back direction will be described with the left side of FIG. 3 as the front and the right side as the rear.

各電線１１は、それぞれ導体１２の周囲が合成樹脂の絶縁被覆１３で覆われている。各電線１１の端末においては、図１に示すように、絶縁被覆１３が剥ぎ取られ導体１２が露出している（露出導体１２）。導体１２は、多数（複数）の金属素線１４が撚り合わされた撚り線である。金属素線１４は、アルミニウム製またはアルミニウム合金製である。   Each electric wire 11 is covered with an insulating coating 13 made of synthetic resin around the conductor 12. At the end of each electric wire 11, as shown in FIG. 1, the insulation coating 13 is stripped and the conductor 12 is exposed (exposed conductor 12). The conductor 12 is a stranded wire in which many (plural) metal strands 14 are twisted together. The metal wire 14 is made of aluminum or aluminum alloy.

２本の電線１１のうち、図３および図４に示す左方（前方）の電線１１Ａ（第１電線１１Ａという）の露出導体１２は、端子２０の下側面２２、支持棒３３およびボルト３１（詳細は後述する）に接触するように圧着されている。図３および図４に示す右方（後方）の電線１１Ｂ（第２電線１１Ｂ）の露出導体１２は、端子２０の上側面２２、支持棒３３およびボルト３１に接触するように圧着されている。   Of the two electric wires 11, the exposed conductor 12 of the left (front) electric wire 11A (referred to as the first electric wire 11A) shown in FIGS. 3 and 4 is the lower surface 22 of the terminal 20, the support rod 33, and the bolt 31 ( It is press-bonded so as to come into contact with details (to be described later). The exposed conductor 12 of the right (rear) electric wire 11B (second electric wire 11B) shown in FIGS. 3 and 4 is crimped so as to come into contact with the upper side surface 22, the support rod 33, and the bolt 31 of the terminal 20.

端子２０は、２本の電線１１が接続されるバレル部２１を有する。端子２０の材料としては、銅、銅合金、アルミニウム、およびアルミニウム合金などの導電性の板材があげられ、必要に応じて任意の金属材料の中から適宜選択される。本実施形態において、端子２０は、銅製または銅合金製である。   The terminal 20 has a barrel portion 21 to which two electric wires 11 are connected. Examples of the material of the terminal 20 include conductive plate materials such as copper, copper alloy, aluminum, and aluminum alloy, and an appropriate metal material is selected as necessary. In the present embodiment, the terminal 20 is made of copper or a copper alloy.

なお、本実施形態の端子２０を構成する金属材料の表面には、メッキ層が形成されていてもよい。メッキ層を構成する金属としては、例えば、スズ、ニッケル等が挙げられ、必要に応じて任意の金属材料の中から適宜選択される。   In addition, the plating layer may be formed in the surface of the metal material which comprises the terminal 20 of this embodiment. Examples of the metal constituting the plating layer include tin, nickel, and the like, and are appropriately selected from arbitrary metal materials as necessary.

本実施形態において、端子２０は、全体として筒状をなしており、その内部には各電線１１の露出導体１２が挿通されている。各露出導体１２はバレル部２１に圧着されている。本実施形態においてバレル部２１はいわゆるクローズドバレルタイプである。   In the present embodiment, the terminal 20 has a cylindrical shape as a whole, and the exposed conductor 12 of each electric wire 11 is inserted through the terminal 20. Each exposed conductor 12 is crimped to the barrel portion 21. In the present embodiment, the barrel portion 21 is a so-called closed barrel type.

バレル部２１の上下に配される面２２（加圧補助板３４が配置されていない部分の一例）は、図５および図６に示すように、露出導体１２側（内側）に凹んだ形状をなしており各露出導体１２に食い込んでいる。   As shown in FIGS. 5 and 6, the surface 22 arranged on the top and bottom of the barrel portion 21 (an example of a portion where the auxiliary pressure plate 34 is not arranged) has a concave shape on the exposed conductor 12 side (inner side). Therefore, each exposed conductor 12 is bitten.

さて、本実施形態では、端子２０のバレル部２１には、図１〜図５に示すように、バレル部２１を露出導体１２に押しつける加圧部材３０が取り付けられている。バレル部２１には加圧部材３０および２本の支持棒３３を貫通可能に６つの貫通孔２１Ａが形成されている。バレル部２１の６つの貫通孔２１Ａは、３つずつ１列に並んで対向する位置に形成されている。   In this embodiment, a pressure member 30 that presses the barrel portion 21 against the exposed conductor 12 is attached to the barrel portion 21 of the terminal 20 as shown in FIGS. Six through holes 21A are formed in the barrel portion 21 so as to be able to penetrate the pressure member 30 and the two support rods 33. The six through-holes 21A of the barrel portion 21 are formed at positions facing each other in a row by three.

加圧部材３０は、図５に示すように、バレル部２１を貫通して取り付けられている。本実施形態において、加圧部材３０は、図５〜図７に示すように、ボルト３１とナット３２とからなり、加圧補助板３４とともにバレル部２１に取り付けられている。詳しくは、バレル部２１には、２枚の加圧補助板３４、２本の支持棒３３、および１組のボルト３１とナット３２が取り付けられている。   As shown in FIG. 5, the pressure member 30 is attached through the barrel portion 21. In this embodiment, as shown in FIGS. 5 to 7, the pressing member 30 includes a bolt 31 and a nut 32, and is attached to the barrel portion 21 together with the auxiliary pressure plate 34. Specifically, two auxiliary pressure plates 34, two support rods 33, and a set of bolts 31 and nuts 32 are attached to the barrel portion 21.

２枚の加圧補助板３４は対向する位置に配されている。各加圧補助板３４には、２本の支持棒３３が挿通される２つの支持棒挿通孔３５が形成されるとともに、２つの支持棒挿通孔３５の間にボルト３１が挿通されるボルト挿通孔３６が形成されている。加圧補助板３４はバレル部２１の貫通孔２１Ａが形成された部分の外壁面に接触するように配されており、加圧補助板３４の支持棒挿通孔３５とバレル部２１の貫通孔２１Ａ、加圧補助板３４のボルト挿通孔３６とバレル部２１の貫通孔２１Ａが、重なり合う位置に配されるようになっている。   The two pressure auxiliary plates 34 are arranged at opposing positions. Each auxiliary pressure plate 34 is formed with two support rod insertion holes 35 through which the two support rods 33 are inserted, and a bolt insertion through which the bolt 31 is inserted between the two support rod insertion holes 35. A hole 36 is formed. The auxiliary pressure plate 34 is arranged so as to contact the outer wall surface of the portion of the barrel portion 21 where the through hole 21A is formed, and the support rod insertion hole 35 of the auxiliary pressure plate 34 and the through hole 21A of the barrel portion 21. The bolt insertion hole 36 of the auxiliary pressure plate 34 and the through hole 21A of the barrel portion 21 are arranged at overlapping positions.

２本の支持棒３３およびボルト３１は、一方の加圧補助板３４から、バレル部２１を挟んで対向する位置にある他方の加圧補助板３４まで貫通して取り付けられている。加圧補助板３４およびバレル部２１を貫通して取り付けられている２本の支持棒３３は、加圧補助板３４の外側面に溶接等の方法により接合されている。バレル部２１に取り付けられたボルト３１は、着脱可能であり、ボルト３１をナット３２締めすることにより、加圧補助板３４を介してバレル部２１が露出導体１２に押しつけられるようになっている。   The two support rods 33 and the bolts 31 are attached so as to penetrate from one pressure assisting plate 34 to the other pressure assisting plate 34 at a position facing each other across the barrel portion 21. The two support rods 33 that are attached through the pressurizing auxiliary plate 34 and the barrel portion 21 are joined to the outer surface of the pressurizing auxiliary plate 34 by a method such as welding. The bolt 31 attached to the barrel portion 21 is detachable, and the barrel portion 21 is pressed against the exposed conductor 12 via the auxiliary pressure plate 34 by tightening the bolt 31 with the nut 32.

加圧部材３０、加圧補助板３４および支持棒３３を構成する材料は、銅、銅合金、アルミニウム、およびアルミニウム合金などの導電性材料であり、必要に応じて任意の金属材料の中から適宜選択される。加圧部材３０および加圧補助板３４の表面には、スズやニッケル等のメッキ層が形成されていてもよい。本実施形態において、加圧部材３０および加圧補助板３４は、銅または銅合金製の金属板材であり、その表面にはスズメッキ層が形成されている。   The material constituting the pressure member 30, the auxiliary pressure plate 34, and the support rod 33 is a conductive material such as copper, copper alloy, aluminum, and aluminum alloy, and is appropriately selected from arbitrary metal materials as necessary. Selected. A plating layer such as tin or nickel may be formed on the surfaces of the pressure member 30 and the auxiliary pressure plate 34. In the present embodiment, the pressing member 30 and the auxiliary pressing plate 34 are copper or copper alloy metal plates, and a tin plating layer is formed on the surface thereof.

次に、本実施形態の端子付き電線１０の製造方法について説明する。
図７に示すように、端子２０、２枚の加圧補助板３４、２本の支持棒３３、１組のボルト３１とナット３２を用意し、２本の電線１１の端末の絶縁被覆１３を剥離除去して芯線１２を露出させておく。 Next, the manufacturing method of the electric wire 10 with a terminal of this embodiment is demonstrated.
As shown in FIG. 7, a terminal 20, two pressure auxiliary plates 34, two support rods 33, a pair of bolts 31 and a nut 32 are prepared, and the insulation coating 13 at the ends of the two wires 11 is provided. The core wire 12 is exposed by peeling off.

次に図８に示すように、各加圧補助板３４の支持棒挿通孔３５とバレル部２１の貫通孔２１Ａ、加圧補助板３４のボルト挿通孔３６とバレル部２１の貫通孔２１Ａが重なり合うように、２枚の加圧補助板３４をバレル部２１の外側に配置する。一方の加圧補助板３４の支持棒挿通孔３５からバレル部２１を貫通して、対向する位置にある他方の加圧補助板３４の支持棒挿通孔３５に支持棒３３を挿通させる。また一方の加圧補助板３４のボルト挿通孔３６からバレル部２１を貫通して対向する位置にある他方の加圧補助板３４のボルト挿通孔３６にボルトを挿通させる（取付工程）。支持棒３３を加圧補助板３４の外側面に接合すると、図８〜図１０に示すような加圧部材３０付きの端子２０が得られる。加圧部材３０付きの端子２０においては、バレル部２１の高さ方向における略中央の位置に、２本の支持棒３３とボルト３１が貫通している。   Next, as shown in FIG. 8, the support rod insertion hole 35 of each pressure auxiliary plate 34 and the through hole 21 </ b> A of the barrel portion 21, the bolt insertion hole 36 of the pressure auxiliary plate 34 and the through hole 21 </ b> A of the barrel portion 21 overlap. As described above, the two auxiliary pressure plates 34 are arranged outside the barrel portion 21. The support rod 33 is inserted through the support rod insertion hole 35 of the other auxiliary pressure plate 34 that passes through the barrel portion 21 from the support rod insertion hole 35 of the auxiliary pressure plate 34. Further, a bolt is inserted from the bolt insertion hole 36 of one of the pressure auxiliary plates 34 into the bolt insertion hole 36 of the other pressure auxiliary plate 34 located at the opposite position through the barrel portion 21 (attachment process). When the support bar 33 is joined to the outer surface of the auxiliary pressure plate 34, the terminal 20 with the pressing member 30 as shown in FIGS. 8 to 10 is obtained. In the terminal 20 with the pressure member 30, the two support bars 33 and the bolts 31 pass through substantially the central position in the height direction of the barrel portion 21.

次に、２本の電線１１Ａ，１１Ｂを、バレル部２１の前後の開口からバレル部２１内に挿通させる。具体的には、第１電線１１Ａをバレル部２１の前方の開口からバレル部２１内の支持棒３３およびボルト３１の下側の空間に挿入し、第２電線１１Ｂをバレル部２１の後方の開口からバレル部２１内の支持棒３３およびボルト３１よりも上側の空間に挿入する。２本の電線１１をバレル部２１内に挿入すると図１２に示すような端子２０が得られる。   Next, the two electric wires 11 </ b> A and 11 </ b> B are inserted into the barrel portion 21 from the front and rear openings of the barrel portion 21. Specifically, the first electric wire 11A is inserted into the space below the support rod 33 and the bolt 31 in the barrel portion 21 from the opening in front of the barrel portion 21, and the second electric wire 11B is opened in the rear of the barrel portion 21. To the space above the support rod 33 and the bolt 31 in the barrel portion 21. When the two electric wires 11 are inserted into the barrel portion 21, a terminal 20 as shown in FIG. 12 is obtained.

次に、電線１１を挿入した端子２０のバレル部２１を、図１３〜図１６に示すように、圧着用治具３７を用いて、各露出導体１２に圧着する（圧着工程）。圧着工程においては、バレル部２１の上下面であって、加圧補助板３４の配されていない部分２２を、圧着用治具３７の金型３８に接触するように配置する（図１４を参照）。図１４に示すように、圧着用治具３７に配置したとき（圧着前）のバレル部２１の断面は略円形状である。   Next, as shown in FIGS. 13 to 16, the barrel portion 21 of the terminal 20 into which the electric wire 11 is inserted is crimped to each exposed conductor 12 using a crimping jig 37 (crimping step). In the crimping step, the portions 22 on the upper and lower surfaces of the barrel portion 21 where the auxiliary pressure plate 34 is not disposed are arranged so as to contact the mold 38 of the crimping jig 37 (see FIG. 14). ). As shown in FIG. 14, the cross section of the barrel portion 21 when placed on the crimping jig 37 (before crimping) is substantially circular.

本実施形態では、圧着用治具３７の金型３８として中央部分が凸形状をなしているものを用いる。したがって、圧着用治具３７の金型３８によりバレル部２１を上下から挟持して圧着した後のバレル部２１の上下面２２は、図１６に示すように金型３８の形状に沿って凹んだ形状に変形する。   In this embodiment, a die 38 having a convex shape at the center is used as the die 38 of the crimping jig 37. Therefore, the upper and lower surfaces 22 of the barrel portion 21 after the barrel portion 21 is clamped from above and below by the die 38 of the crimping jig 37 are recessed along the shape of the die 38 as shown in FIG. Deform to shape.

次に、圧着工程を経た後の端子付き電線１０のバレル部２１をボルト３１で締め付けることにより露出導体１２に押しつける加圧工程を実行すると、図１に示す本実施形態の端子付き電線１０が得られる。加圧工程の実行により、バレル部２１が露出導体１２に押しつけられてバレル部２１と露出導体１２との接触荷重の低下を防止することができ、バレル部２１を貫通する加圧部材３０と支持棒３３に露出導体１２の素線１４が接触する。さらに加圧工程の実行により、露出導体１２を構成する素線１４の表面の酸化アルミニウム膜の破壊が促進され、金属新生面が形成される。   Next, when the pressurizing step of pressing the exposed conductor 12 by tightening the barrel portion 21 of the terminal-attached electric wire 10 after the crimping step with the bolt 31 is performed, the electric wire with terminal 10 of the present embodiment shown in FIG. 1 is obtained. It is done. By executing the pressurizing step, the barrel portion 21 is pressed against the exposed conductor 12 to prevent the contact load between the barrel portion 21 and the exposed conductor 12 from decreasing, and the pressurizing member 30 penetrating the barrel portion 21 and the support are supported. The wire 14 of the exposed conductor 12 contacts the rod 33. Furthermore, by performing the pressurizing step, the destruction of the aluminum oxide film on the surface of the element wire 14 constituting the exposed conductor 12 is promoted, and a new metal surface is formed.

次に、本実施形態の作用および効果について説明する。
本実施形態においては、導電性材料からなる加圧部材３０が、バレル部２１を貫通するように取り付けられており、当該加圧部材３０によりバレル部２１が露出導体１２に押しつけられる。したがって、本実施形態によれば、加圧部材３０によりバレル部２１と露出導体１２との接触荷重の低下が防止され、導電性材料からなる加圧部材３０および支持棒３３と、導体１２を構成する素線１４との接触により電気的な接続を良好なものとすることができるので、端子２０との接続信頼性を向上させた端子付き電線１０およびその製造方法を提供することができる。 Next, the operation and effect of this embodiment will be described.
In the present embodiment, a pressure member 30 made of a conductive material is attached so as to penetrate the barrel portion 21, and the barrel portion 21 is pressed against the exposed conductor 12 by the pressure member 30. Therefore, according to the present embodiment, the pressure member 30 prevents the contact load between the barrel portion 21 and the exposed conductor 12 from being lowered, and the pressure member 30 and the support rod 33 made of a conductive material and the conductor 12 are configured. Since the electrical connection can be improved by contact with the element wire 14 to be performed, the terminal-attached electric wire 10 with improved connection reliability with the terminal 20 and a method for manufacturing the same can be provided.

また、本実施形態によれば、バレル部２１を加圧部材３０が貫通して取り付けられているので、加圧部材３０と素線１４とが接触するようになっており、加圧部材３０と素線１４の接触により露出導体１２を構成する素線１４の表面の酸化アルミニウム膜の破壊が促進され金属新生面が形成されるので、接触抵抗を低下することもできる。   Moreover, according to this embodiment, since the pressurizing member 30 is attached through the barrel portion 21, the pressurizing member 30 and the wire 14 come into contact with each other. Since the destruction of the aluminum oxide film on the surface of the strand 14 constituting the exposed conductor 12 is promoted by the contact of the strand 14 and a new metal surface is formed, the contact resistance can be lowered.

また、本実施形態によれば、加圧部材３０は、バレル部２１を貫通するボルト３１と、ボルト３１をバレル部２１に対して固定するナット３２とを備えているから、バレル部２１にボルト３１を貫通させ、ナット３２締めすることによりバレル部２１を露出導体１２に押しつけることができるので、加圧部材３０を簡易な構成とすることができる。   In addition, according to the present embodiment, the pressure member 30 includes the bolt 31 that penetrates the barrel portion 21 and the nut 32 that fixes the bolt 31 to the barrel portion 21. Since the barrel portion 21 can be pressed against the exposed conductor 12 by penetrating 31 and tightening the nut 32, the pressurizing member 30 can have a simple configuration.

また、本実施形態によれば、加圧部材３０とともにバレル部２１を露出導体１２に押しつける加圧補助板３４を備えているから、加圧補助板３４により加圧部材３０がバレル部２１に食い込むのを防止することができる。   In addition, according to the present embodiment, the pressure assisting plate 34 that presses the barrel portion 21 against the exposed conductor 12 together with the pressure member 30 is provided, so that the pressure member 30 bites into the barrel portion 21 by the pressure assisting plate 34. Can be prevented.

また、本実施形態によれば、バレル部２１の加圧補助板３４が配置されていない部分２２が、露出導体１２側に凹んでいるから、バレル部２１が露出導体１２側に食い込むことで導体１２を構成する素線１４の表面の酸化アルミニウム膜の破壊が促進される。   Moreover, according to this embodiment, since the part 22 where the auxiliary pressure plate 34 of the barrel portion 21 is not disposed is recessed on the exposed conductor 12 side, the barrel portion 21 bites into the exposed conductor 12 side so that the conductor The breakage of the aluminum oxide film on the surface of the wire 14 constituting 12 is promoted.

ところで、アルミニウムまたはアルミニウム合金製の導体を備える電線では、銅製の端子との熱膨張率の差が大きいため、クリープ現象による影響を受けやすく接続状態が悪化しやすいという問題があるうえに、素線１４の表面に、硬い酸化アルミニウム膜が形成されやすく接触抵抗が上昇するという懸念があった。しかしながら、本実施形態によれば、導体１２がアルミニウムまたはアルミニウム合金製の素線１４を複数本撚り合わせた撚り線からなるから、アルミニウムまたはアルミニウム合金製の導体１２を備える電線１１において、バレル部２１と露出導体１２との接触荷重の低下を防止できるとともに、加圧部材３０と素線１４の接触により素線１４の表面に形成される酸化アルミニウム膜（金属酸化膜）の破壊が促進されるので、端子２０との接続信頼性を向上させることができる。   By the way, an electric wire provided with a conductor made of aluminum or an aluminum alloy has a large difference in thermal expansion coefficient from a copper terminal, so that there is a problem that the connection state is easily deteriorated due to the effect of creep phenomenon. There is a concern that a hard aluminum oxide film is likely to be formed on the surface 14 and the contact resistance increases. However, according to the present embodiment, since the conductor 12 is formed of a stranded wire obtained by twisting a plurality of strands 14 made of aluminum or aluminum alloy, in the electric wire 11 including the conductor 12 made of aluminum or aluminum alloy, the barrel portion 21 is provided. The contact load between the exposed conductor 12 and the exposed conductor 12 can be prevented from being lowered, and the destruction of the aluminum oxide film (metal oxide film) formed on the surface of the strand 14 by the contact between the pressing member 30 and the strand 14 is promoted. The connection reliability with the terminal 20 can be improved.

また本実施形態によれば、加圧部材３０は、端子２０を構成する金属材料と同じ金属を含んでいるから、加圧部材３０と端子２０（バレル部２１）とが接触する部分において、異種金属の接触する部分に発生する腐食（電食）が生じにくくなる。   Moreover, according to this embodiment, since the pressurization member 30 contains the same metal as the metal material which comprises the terminal 20, in a part which the pressurization member 30 and the terminal 20 (barrel part 21) contact, it is different. Corrosion (electric corrosion) occurring in the metal contact portion is less likely to occur.

＜実施形態２＞
実施形態２の端子付き電線４０を図１７によって説明する。本実施形態の端子付き電線４０は、端子４１の形状および、バレル部４２に圧着される電線１１が１本であるという点で実施形態１と相違する。実施形態１と同様の構成については同一の符号を付し重複した説明は省略する。 <Embodiment 2>
The electric wire 40 with a terminal of Embodiment 2 is demonstrated with FIG. The electric wire with terminal 40 of the present embodiment is different from that of the first embodiment in that the shape of the terminal 41 and the electric wire 11 to be crimped to the barrel portion 42 are one. The same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

電線１１は導体１２の周囲が合成樹脂の絶縁被覆１３で覆われており、その端末においては、図１７に示すように、絶縁被覆１３が剥ぎ取られ導体１２が露出している（露出導体１２）。   The electric wire 11 is covered with a synthetic resin insulating coating 13 around the conductor 12, and at the end thereof, as shown in FIG. 17, the insulating coating 13 is stripped and the conductor 12 is exposed (exposed conductor 12). ).

端子４１は、電線１１の露出導体１２が接続されるバレル部４２と、バレル部４２から連なり相手側の端子（図示せず）と接続される平板状の端子接続部４４と、を備える。端子接続部４４の略中央部には、相手側の端子を接続する端子接続孔４４Ａが設けられている。図中４３はバレル部４２の上下面であって加圧補助板３４の配置されていない部分である。   The terminal 41 includes a barrel portion 42 to which the exposed conductor 12 of the electric wire 11 is connected, and a flat terminal connection portion 44 that is continuous from the barrel portion 42 and is connected to a counterpart terminal (not shown). A terminal connection hole 44 </ b> A for connecting a counterpart terminal is provided at a substantially central portion of the terminal connection portion 44. In the figure, reference numeral 43 denotes the upper and lower surfaces of the barrel portion 42 where the auxiliary pressure plate 34 is not disposed.

バレル部４２には実施形態１と同様の構成の加圧部材３０および加圧補助板３４が取り付けられており、バレル部４２内にはボルト３１と２本の支持棒３３が貫通して配されている。   A pressure member 30 and a pressure auxiliary plate 34 having the same configuration as that of the first embodiment are attached to the barrel portion 42, and the bolt 31 and the two support rods 33 are disposed through the barrel portion 42. ing.

電線１１の露出導体１２はバレル部４２内の支持棒３３およびボルト３１の下側の空間、ならびに上側の空間の双方に挿入されており、バレル部４２に圧着されている。その他の構成は概ね実施形態１と同様である。本実施形態によっても実施形態１と同様の効果が得られる。   The exposed conductor 12 of the electric wire 11 is inserted into both the space below the support rod 33 and the bolt 31 in the barrel portion 42 and the upper space, and is crimped to the barrel portion 42. Other configurations are generally the same as those of the first embodiment. According to this embodiment, the same effect as that of the first embodiment can be obtained.

＜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。 <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）実施形態１では、端子２０のバレル部２１の前方の開口と後方の開口に電線１１を１本ずつ挿入した例を示したが、例えば図１８に示すように２本の電線１１を端子２０のバレル部２１の一方の開口に挿入してもよい。また、バレル部に挿入される電線は３本以上であってもかまわない。
図１８に示す端子付き電線５０においては端子２０、加圧部材３０、加圧補助板３４の構成は実施形態１と同様であり実施形態１と同様の構成については同じ符号を付している。 (1) In Embodiment 1, although the example which inserted the electric wire 11 one by one in the opening of the front and back of the barrel part 21 of the terminal 20 was shown, for example, as shown in FIG. You may insert in one opening of the barrel part 21 of the terminal 20. FIG. Moreover, the electric wire inserted in a barrel part may be three or more.
In the electric wire with terminal 50 shown in FIG. 18, the configurations of the terminal 20, the pressing member 30, and the auxiliary pressing plate 34 are the same as those in the first embodiment, and the same reference numerals are given to the same configurations as those in the first embodiment.

（２）実施形態２では相手方の端子と接続される端子接続部４４を有する端子４１に１本の電線１１を接続する例を示したが、実施形態２のような構成の端子に２本以上の電線を接続してもよい。   (2) In the second embodiment, the example in which one electric wire 11 is connected to the terminal 41 having the terminal connection portion 44 connected to the counterpart terminal has been shown. However, two or more terminals are configured in the configuration as in the second embodiment. May be connected.

（３）上記実施形態では加圧部材３０を１組のボルト３１とナット３２により構成したが、２組以上のボルトとナットであってもよいし、貫通する加圧部材であればボルトとナット以外の加圧部材であってもよい。   (3) In the above embodiment, the pressure member 30 is constituted by a set of bolts 31 and nuts 32. However, two or more sets of bolts and nuts may be used. Other pressurizing members may be used.

（４）上記実施形態では平板状の一対の加圧補助板３４を備えるものを示したが、加圧補助板を備えないものであってもよいし、かさ付きのナット等であってもよい。   (4) In the above embodiment, a plate having a pair of flat pressure assisting plates 34 has been shown. However, the plate may not include a pressure assisting plate, or may be a nut with a bulk. .

（５）上記実施形態ではバレル部２１が露出導体１２側に凹んでいる形状のものを示したが、バレル部は露出導体と接触していれば凹み形状でなくてもよい。   (5) In the above-described embodiment, the barrel portion 21 has a concave shape on the exposed conductor 12 side. However, the barrel portion may not have a concave shape as long as it is in contact with the exposed conductor.

（６）上記実施形態ではクローズドバレルタイプのバレル部２１を備える端子２０を示したが、オープンバレルタイプのバレル部を備えるものであってもよい。   (6) Although the terminal 20 provided with the barrel part 21 of a closed barrel type was shown in the said embodiment, you may provide a barrel part of an open barrel type.

（７）上記実施形態では、アルミニウムまたはアルミニウム合金製の素線１４を複数本撚り合わせた撚り線からなる導体１２を備える電線１１を示したが、銅または銅合金製の素線を備える導体を有する電線であってもよい。   (7) In the said embodiment, although the electric wire 11 provided with the conductor 12 which consists of the strand wire which twisted the strand 14 made from aluminum or aluminum alloy was shown, the conductor provided with the strand made from copper or a copper alloy is shown. It may be an electric wire.

（８）上記実施形態では加圧部材３０および加圧補助板３４は、端子２０を構成する材料と同じ金属を含むものを示したが、加圧部材および加圧補助板は、端子を構成する材料と相違する金属を含むものであってもよい。また、上記実施形態ではこれらの部材の材料が銅または銅合金製である例を示したが、アルミニウムやアルミニウム合金などであってもよい。   (8) In the above embodiment, the pressure member 30 and the auxiliary pressure plate 34 include the same metal as the material constituting the terminal 20, but the pressure member and the auxiliary pressure plate constitute the terminal. It may contain a metal different from the material. Moreover, although the example which the material of these members made from copper or a copper alloy was shown in the said embodiment, aluminum, aluminum alloy, etc. may be sufficient.

１０，４０，５０…端子付き電線
１１…電線
１１Ａ…第１電線
１１Ｂ…第２電線
１２…導体
１３…絶縁被覆
２０，４１…端子
２１，４２…バレル部
２１Ａ…貫通孔
２２，４３…上下に配される面（加圧補助板が配置されていない部分）
３０…加圧部材
３１…ボルト
３２…ナット
３３…支持棒
３４…加圧補助板
３５…支持棒挿通孔
３６…ボルト挿通孔 DESCRIPTION OF SYMBOLS 10, 40, 50 ... Electric wire with a terminal 11 ... Electric wire 11A ... 1st electric wire 11B ... 2nd electric wire 12 ... Conductor 13 ... Insulation coating 20, 41 ... Terminal 21, 42 ... Barrel part 21A ... Through-hole 22, 43 ... Up and down Arranged surface (part where pressure auxiliary plate is not arranged)
30 ... Pressure member 31 ... Bolt 32 ... Nut 33 ... Support bar 34 ... Pressure auxiliary plate 35 ... Support bar insertion hole 36 ... Bolt insertion hole

Claims (12)

導体および前記導体を覆う絶縁被覆を有する電線と、前記電線の端末において露出させた露出導体に圧着されるバレル部を有する端子と、を備えた端子付き電線であって、
前記バレル部には、導電性材料からなり、前記バレル部を前記露出導体に押しつける加圧部材が前記バレル部を貫通して取り付けられている端子付き電線。 An electric wire with a terminal comprising: a conductor and an electric wire having an insulating coating covering the conductor; and a terminal having a barrel portion that is crimped to an exposed conductor exposed at an end of the electric wire,
An electric wire with a terminal, which is made of a conductive material and is attached to the barrel portion through the barrel portion so as to press the barrel portion against the exposed conductor. 前記加圧部材は、前記バレル部を貫通するボルトと、前記ボルトをバレル部に対して固定するナットとを備える請求項１に記載の端子付き電線。 The said pressurization member is an electric wire with a terminal of Claim 1 provided with the volt | bolt which penetrates the said barrel part, and the nut which fixes the said volt | bolt with respect to a barrel part. 前記加圧部材とともに前記バレル部を前記露出導体に押しつける加圧補助板を備える請求項１または請求項２に記載の端子付き電線。 The electric wire with a terminal according to claim 1 or 2, further comprising a pressing auxiliary plate that presses the barrel portion against the exposed conductor together with the pressing member. 前記バレル部の前記加圧補助板が配置されていない部分が、前記露出導体側に凹んでいる請求項３に記載の端子付き電線。 The electric wire with a terminal according to claim 3, wherein a portion of the barrel portion where the auxiliary pressure plate is not disposed is recessed toward the exposed conductor. 前記導体がアルミニウムまたはアルミニウム合金製の素線を複数本撚り合わせた撚り線からなる請求項１ないし請求項４のいずれか一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 4, wherein the conductor is formed of a stranded wire obtained by twisting a plurality of strands made of aluminum or an aluminum alloy. 前記加圧部材は、前記端子を構成する金属材料と同じ金属を含む請求項１ないし請求項４のいずれか一項に記載の端子付き電線。 The said pressurization member is an electric wire with a terminal as described in any one of Claim 1 thru | or 4 containing the same metal as the metal material which comprises the said terminal. 導体および前記導体を覆う絶縁被覆を有する電線と、前記電線の端末において露出させた露出導体に圧着されるバレル部を有する端子と、を備えた端子付き電線の製造方法であって、
前記バレル部に、導電性材料からなり、当該バレル部を前記露出導体に押しつけるための加圧部材を貫通させて取り付ける取付工程を経た後、前記バレル部を前記露出導体に圧着する圧着工程を実行し、
前記圧着工程を実行した後、前記加圧部材により前記バレル部を前記露出導体に押しつける加圧工程を実行する端子付き電線の製造方法。 A method of manufacturing an electric wire with a terminal, comprising: a conductor and an electric wire having an insulating coating covering the conductor; and a terminal having a barrel portion that is crimped to an exposed conductor exposed at an end of the electric wire,
After the mounting process of attaching a pressure member for pressing the barrel part against the exposed conductor through the barrel part, the crimping process for crimping the barrel part to the exposed conductor is performed. And
The manufacturing method of the electric wire with a terminal which performs the pressurization process which presses the said barrel part against the said exposed conductor with the said pressurization member after performing the said crimping | compression-bonding process. 前記加圧部材は、前記バレル部を貫通するボルトと、前記ボルトをバレル部に対して固定するナットとを備える請求項７に記載の端子付き電線の製造方法。 The said pressurizing member is a manufacturing method of the electric wire with a terminal of Claim 7 provided with the volt | bolt which penetrates the said barrel part, and the nut which fixes the said volt | bolt with respect to a barrel part. 前記取付工程において、前記加圧部材とともに前記バレル部を前記露出導体に押しつける加圧補助板を、前記バレル部の外側に配置する請求項７または請求項８に記載の端子付き電線の製造方法。 The manufacturing method of the electric wire with a terminal according to claim 7 or 8 which arranges a pressure auxiliary board which presses said barrel part together with said pressure member to said exposed conductor in said attachment process on the outside of said barrel part. 前記圧着工程において、前記バレル部の前記加圧補助板が配置されていない部分を圧着して、前記露出導体側に凹ませる請求項９に記載の端子付き電線の製造方法。 The method for manufacturing a terminal-attached electric wire according to claim 9, wherein, in the crimping step, a portion of the barrel portion where the auxiliary pressure plate is not disposed is crimped and recessed toward the exposed conductor. 前記導体がアルミニウムまたはアルミニウム合金製の素線を複数本撚り合わせた撚り線からなる請求項７ないし請求項１０のいずれか一項に記載の端子付き電線の製造方法。 The manufacturing method of the electric wire with a terminal as described in any one of Claims 7 thru | or 10 in which the said conductor consists of a strand wire which twisted together the strand made from aluminum or aluminum alloy. 前記加圧部材は、前記端子を構成する金属材料と同じ金属を含む請求項７ないし請求項１１のいずれか一項に記載の端子付き電線の製造方法。 The said pressurization member is a manufacturing method of the electric wire with a terminal as described in any one of Claim 7 thru | or 11 containing the same metal as the metal material which comprises the said terminal.
JP2011287241A 2011-12-28 2011-12-28 Electric wire with terminal and manufacturing method of the same Pending JP2013137879A (en)

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CN104634200A (en) * 2013-11-13 2015-05-20 湖北卫东化工股份有限公司 Digital electronic detonator detonating network junction device
CN104991093A (en) * 2015-06-24 2015-10-21 国网天津市电力公司 Cable test splicing fitting
JP6692502B1 (en) * 2019-03-27 2020-05-13 三菱電機株式会社 Stationary induction equipment

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CN104634200A (en) * 2013-11-13 2015-05-20 湖北卫东化工股份有限公司 Digital electronic detonator detonating network junction device
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