JP6423464B2 - Litz wire terminal connection and terminal connection method - Google Patents

Litz wire terminal connection and terminal connection method Download PDF

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JP6423464B2
JP6423464B2 JP2017018958A JP2017018958A JP6423464B2 JP 6423464 B2 JP6423464 B2 JP 6423464B2 JP 2017018958 A JP2017018958 A JP 2017018958A JP 2017018958 A JP2017018958 A JP 2017018958A JP 6423464 B2 JP6423464 B2 JP 6423464B2
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富彦 平賀
富彦 平賀
信幸 瀬間
信幸 瀬間
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SWCC Showa Cable Systems Co Ltd
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Description

本発明は、リッツ線の端子接続部及び端子接続方法に関する。   The present invention relates to a terminal connection portion and a terminal connection method for a litz wire.

一般に、発変電所等の電力設備には、建築構造物や電気設備等（以下「被接地体」と称する）を地絡故障や雷撃から保護するために、被接地体に流入した故障電流や雷電流（サージ電流）を大地に放出し拡散させる接地システムが設けられている。接地システムは、被接地体と大地を電気的に接続し、地絡故障電流や雷電流が流れる接地線を備える。接地線は、例えば、地中に埋設される接地極と電気的に接続される。   Generally, power facilities such as substations and substations have a fault current flowing into a grounded body to protect a building structure or electrical equipment (hereinafter referred to as a “grounded body”) from a ground fault or lightning strike. There is a grounding system that releases and spreads lightning current (surge current) to the ground. The grounding system includes a grounding wire that electrically connects the grounded body and the ground and through which a ground fault current or a lightning current flows. The ground wire is electrically connected to, for example, a ground electrode buried in the ground.

従来の接地システムは、地絡故障時に流れる低周波（直流、商用周波）の特性を基準に設計・施工されており、接地線として、例えば単線又は撚り線からなる裸線、あるいは当該裸線からなるケーブル導体にビニル絶縁を施したＩＶ線（ビニル絶縁電線）が用いられている。この場合、表皮効果等の影響によって、高周波数帯の電流が流れる際のインピーダンスが上昇する。そのため、１００ｋＨｚ〜１ＭＨｚの高周波成分を含む雷サージ電流が通電した場合に、接地システムの電位上昇が大となり、被接地体に障害（例えば機器の損傷、誤動作）が発生する虞がある。   The conventional grounding system is designed and constructed based on the characteristics of low frequency (DC, commercial frequency) that flows in the event of a ground fault, and as a grounding wire, for example, a bare wire made of a single wire or a stranded wire, or from the bare wire An IV wire (vinyl insulated wire) in which vinyl insulation is applied to a cable conductor is used. In this case, the impedance when a high frequency band current flows increases due to the skin effect or the like. Therefore, when a lightning surge current including a high frequency component of 100 kHz to 1 MHz is applied, the potential increase of the grounding system becomes large, and there is a possibility that a failure (for example, equipment damage or malfunction) occurs in the grounded body.

特に、近年では、電力設備制御や遠隔監視に情報通信技術（ＩＣＴ：Information and Communication Technology）が導入され、ＩＣＴ機器による制御が行われているため、雷撃に対して脆弱であるＩＣＴ機器を保護すべく、接地システムの耐雷性の向上が要求されている。   In particular, in recent years, information and communication technology (ICT) has been introduced for power facility control and remote monitoring, and control is performed by ICT equipment, so that ICT equipment that is vulnerable to lightning strikes is protected. Therefore, it is required to improve the lightning resistance of the grounding system.

接地システムの接地線として、リッツ線を使用することにより、上述した要求に対応することができる。接地システムの接地網や立ち上げ線を容易に形成するために、リッツ線の先端部には金属端子が装着される。接地システムの場合、現場において接地線（リッツ線）の仕様（長さなど）が決まるため、金属端子の接続作業も現場で行われることとなる。   By using a litz wire as the ground wire of the ground system, the above-mentioned requirements can be met. In order to easily form the grounding net and the start-up line of the grounding system, a metal terminal is attached to the tip of the litz wire. In the case of a grounding system, the specifications (length, etc.) of the grounding wire (Litz wire) are determined at the site, so the metal terminal connection work is also performed at the site.

通常、接地システムの接地線のように、電力をエネルギー源として使用する強電用のケーブルの端子接続においては、六角ダイスを用いて金属端子を圧縮によってかしめることにより、ケーブル導体と金属端子とが電気的、機械的に接続される。すなわち、ケーブル導体と金属端子の接触面積を長手方向において十分に確保している。   Normally, in the terminal connection of a high-power cable that uses electric power as an energy source, such as a ground wire of a grounding system, the cable conductor and the metal terminal are connected by crimping the metal terminal using a hexagonal die. Electrically and mechanically connected. That is, a sufficient contact area between the cable conductor and the metal terminal is ensured in the longitudinal direction.

そのため、ケーブル導体としてリッツ線を用いる場合は、導通状態を確保するために、圧縮工程の前工程として、リッツ線を構成する１本１本の導体素線の先端部（金属端子に接続される部分）から絶縁皮膜を除去する必要がある。例えば、金属ブラシやグラインダーを用いた機械的剥離、又は溶剤を用いた化学的剥離により、リッツ線の絶縁皮膜が除去される。   Therefore, when using a litz wire as a cable conductor, in order to ensure a conducting state, as a pre-process of the compression process, the tip of each conductor wire constituting the litz wire (connected to the metal terminal) It is necessary to remove the insulating film from the part). For example, the insulating film of the litz wire is removed by mechanical peeling using a metal brush or grinder, or chemical peeling using a solvent.

また、本出願人は、管状端子の筒部にリッツ線の先端部を挿入するとともに、半田を筒部に流し込み、バーナー等で金属端子を外側からあぶることにより、リッツ線の絶縁皮膜を溶かして除去する方法を採用している。この場合、半田により、リッツ線と金属端子とが電気的及び機械的に接続される。   In addition, the present applicant melts the insulating film of the litz wire by inserting the tip of the litz wire into the tubular portion of the tubular terminal, pouring solder into the tubular portion, and blowing the metal terminal from the outside with a burner or the like. The removal method is adopted. In this case, the litz wire and the metal terminal are electrically and mechanically connected by solder.

特開平６−２７５３２５号公報JP-A-6-275325

上述したように、従来は、リッツ線の先端部から所定長の絶縁皮膜を除去して、リッツ線と金属端子を電気的に接続している。そのため、絶縁皮膜の除去作業に長時間を有し、作業効率が悪い。また、従来は長時間バーナー等の火気を使用しており、安全性の面で好ましくない。さらには、絶縁皮膜を十分に除去できたか否かの判断は、作業者に委ねられるため、作業者の熟練度によって端子接続部の品質（通電性、機械的強度）が安定しない虞がある。   As described above, conventionally, an insulating film having a predetermined length is removed from the tip of the litz wire, and the litz wire and the metal terminal are electrically connected. Therefore, it takes a long time to remove the insulating film and the working efficiency is poor. Conventionally, a fire such as a burner is used for a long time, which is not preferable in terms of safety. Furthermore, since it is left to the operator to determine whether or not the insulating film has been sufficiently removed, the quality (conductivity, mechanical strength) of the terminal connection portion may not be stable depending on the skill level of the operator.

なお、電力を情報伝達や機器制御に使用する弱電用のリッツ線においては、リッツ線の先端部を斜めに切断し、先端面と金属端子を半田により電気的に接続する手法が提案されている（例えば、特許文献１）。   In addition, in the Litz wire for weak electricity that uses power for information transmission and device control, a method has been proposed in which the tip of the litz wire is cut obliquely and the tip and the metal terminal are electrically connected by solder. (For example, patent document 1).

本発明の目的は、端子接続部において電気的及び機械的に安定した品質を容易に実現できるリッツ線の端子接続部及び端子接続方法を提供することである。   The objective of this invention is providing the terminal connection part and terminal connection method of a litz wire which can implement | achieve electrically and mechanically stable quality in a terminal connection part easily.

本発明に係るリッツ線の端子接続部は、
導体の外周面に絶縁皮膜が施された複数の導体素線を撚り合わせてなるリッツ線の先端部と、
前記リッツ線の先端部が挿入される筒状の電線接続部を有する金属端子と、
前記リッツ線の長手軸に沿って形成された所定長の切込みに挿嵌される導通部材と、を備え、
前記電線接続部に挿入された前記リッツ線の先端部において前記切込みに前記導通部材が挿嵌された状態で前記電線接続部をかしめることにより、前記切込みによって現れる前記リッツ線の導体と前記電線接続部とが、前記導通部材を介して電気的に接続されるとともに、前記リッツ線と前記電線接続部とが機械的に接続されることを特徴とする。 The terminal connection part of the litz wire according to the present invention is
A tip portion of a litz wire formed by twisting a plurality of conductor wires each having an insulating film applied to the outer peripheral surface of the conductor;
A metal terminal having a cylindrical wire connecting portion into which the tip of the litz wire is inserted;
A conduction member inserted into a predetermined length of cut formed along the longitudinal axis of the litz wire, and
The conductor of the litz wire and the electric wire appearing by the notch by caulking the wire connecting part with the conducting member inserted into the notch at the tip of the litz wire inserted into the wire connecting part. The connection portion is electrically connected via the conductive member, and the litz wire and the wire connection portion are mechanically connected.

本発明に係るリッツ線の端子接続方法は、
導体の外周面に絶縁皮膜が施された複数の導体素線を撚り合わせてなるリッツ線の先端部に、前記リッツ線の先端部が挿入される筒状の電線接続部を有する金属端子を接続するリッツ線の端子接続方法であって、
（Ａ）前記リッツ線の先端部に、長手軸に沿って所定長の切込みを形成する工程と、
（Ｂ）前記切込みに導通部材を挿嵌する工程と、
（Ｃ）前記導通部材が挿嵌された前記リッツ線の先端部を、前記絶縁皮膜を除去することなく前記電線接続部に挿入する工程と、
（Ｄ）前記電線接続部をかしめて、前記切込みによって現れる前記リッツ線の導体と前記電線接続部とを前記導通部材を介して電気的に接続するとともに、前記リッツ線と前記電線接続部とを機械的に接続する工程と、
を備えることを特徴とする。 The terminal connection method of the litz wire according to the present invention is:
Connect a metal terminal having a cylindrical wire connection part into which the leading end of the litz wire is inserted into the leading end of the litz wire, which is formed by twisting together a plurality of conductor strands having an insulating film applied to the outer peripheral surface of the conductor. A terminal connection method for litz wire,
(A) forming a notch of a predetermined length along the longitudinal axis at the tip of the litz wire;
(B) inserting a conductive member into the notch;
(C) inserting the leading end portion of the litz wire into which the conductive member is inserted into the electric wire connecting portion without removing the insulating film;
(D) Caulking the electric wire connecting part, electrically connecting the conductor of the Litz wire that appears by the cut and the electric wire connecting part via the conductive member, and connecting the Litz wire and the electric wire connecting part. A mechanical connection step;
It is characterized by providing.

本発明によれば、リッツ線の端子接続部において電気的及び機械的に安定した品質を容易に実現することができる。   According to the present invention, electrically and mechanically stable quality can be easily realized in the terminal connection portion of the litz wire.

接地システムの構成を示す図である。It is a figure which shows the structure of a grounding system. 図２Ａ〜図２Ｃは、接地線の一例を示す図である。2A to 2C are diagrams illustrating an example of a ground line. 金属端子の一例を示す斜視図である。It is a perspective view which shows an example of a metal terminal. 図４Ａ〜図４Ｅは、接地線の端末接続方法を示す図である。4A to 4E are diagrams showing a terminal connection method of the ground wire. 図５Ａ、図５Ｂは、実施の形態に係る接地線の端子接続部の一例を示す図である。5A and 5B are diagrams illustrating an example of a terminal connection portion of a ground wire according to the embodiment. 接地線の端子接続部の他の一例を示す図である。It is a figure which shows another example of the terminal connection part of a ground wire.

以下、本発明の実施の形態を、図面を参照して詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、接地システム１の構成を示す図である。接地システム１の接地線ＥＷの端子接続部において、本発明の一実施の形態に係るリッツ線の端子接続部が適用される。   FIG. 1 is a diagram showing a configuration of the grounding system 1. In the terminal connection portion of the ground wire EW of the ground system 1, the terminal connection portion of the litz wire according to one embodiment of the present invention is applied.

接地システム１は、発変電所等の電力設備の地中部および周囲に付属設備として設けられ、建築構造物や電気設備等の被接地体２０を地絡故障や雷撃から保護するために、被接地体２０に流入した故障電流や雷電流（サージ電流）を大地に放出し拡散させる。   The grounding system 1 is provided as an accessory facility in and around power facilities such as substations and substations. In order to protect the grounded body 20 such as a building structure and electrical equipment from ground faults and lightning strikes, the grounding system 1 is grounded. The fault current and the lightning current (surge current) flowing into the body 20 are released to the ground and diffused.

図１に示すように、接地システム１は、被接地体２０と大地を電気的に接続し、地絡故障電流、雷電流、又は遮蔽電流が流れる接地線ＥＷを備える。接地線ＥＷは、地中に埋設される接地極１１と電気的に接続される。   As shown in FIG. 1, the grounding system 1 includes a grounding wire EW that electrically connects the grounded body 20 and the ground and through which a ground fault current, lightning current, or shielding current flows. The ground wire EW is electrically connected to the ground electrode 11 buried in the ground.

接地線ＥＷは、接地網１２、立ち上げ線１３、極接続線１４を形成する。接地網１２は、複数の接地線ＥＷが所定の間隔（例えば４ｍ）で格子状に配置された構成を有し、略水平な状態で地中に埋設される。接地網１２は、接地線ＥＷが環状に配置された構成でもよい。接地網１２は、電力設備の建設範囲のほぼ全体をカバーする大きさを有する。被接地体２０は、立ち上げ線１３を介して、接地網１２と電気的に接続される。接地網１２は、極接続線１４を介して、接地極１１と電気的に接続される。接地網１２を備えることにより、等電位化を図ることができる。   The ground line EW forms a ground network 12, a rising line 13, and a pole connection line 14. The grounding network 12 has a configuration in which a plurality of grounding wires EW are arranged in a grid pattern at a predetermined interval (for example, 4 m), and are buried in the ground in a substantially horizontal state. The grounding network 12 may have a configuration in which the grounding wires EW are arranged in a ring shape. The grounding network 12 has a size that covers almost the entire construction range of the power equipment. The grounded body 20 is electrically connected to the grounding network 12 via the rising line 13. The grounding network 12 is electrically connected to the grounding electrode 11 via the pole connection line 14. By providing the grounding network 12, it is possible to achieve equipotentiality.

本実施の形態では、接地線ＥＷとして、導体を絶縁皮膜で被覆した素線（エナメル線）を複数本集合して撚り合わせたリッツ線を用いる。図２Ａ〜図２Ｃは、接地線ＥＷの一例を示す断面図である。   In the present embodiment, as the ground wire EW, a litz wire is used in which a plurality of strands (enamel wires) whose conductors are covered with an insulating film are gathered and twisted together. 2A to 2C are cross-sectional views illustrating an example of the ground line EW.

図２Ａに示す接地線ＥＷ１は、複数本（図２Ａでは２０本）の素線１００を集合して撚り合わせた構成を有する。   The grounding wire EW1 shown in FIG. 2A has a configuration in which a plurality (20 in FIG. 2A) of strands 100 are assembled and twisted together.

素線１００は、例えば軟銅からなる導体１０１に、絶縁皮膜１０２を焼き付けた、仕上がり外径が約０．４５ｍｍのエナメル線である。絶縁皮膜１０２には、例えばポリビニルホルマール、ポリウレタン、ポリウレタンナイロン、ポリエステル、ポリエステルナイロン、ポリエステルイミド、ポリアミドイミド、ポリエステルイミド／ポリアミドイミド、ポリイミド等が適用される。なお、図２Ａに示す接地線ＥＷ１は、エナメル線の集合撚りで、撚り方向は、Ｓ（右）撚り、またはＺ（左）撚りのいずれかによって形成されており、仕上がり外径は約２．５ｍｍである。   The strand 100 is an enameled wire having a finished outer diameter of about 0.45 mm obtained by baking an insulating film 102 on a conductor 101 made of, for example, soft copper. For the insulating film 102, for example, polyvinyl formal, polyurethane, polyurethane nylon, polyester, polyester nylon, polyesterimide, polyamideimide, polyesterimide / polyamideimide, polyimide, or the like is applied. The ground wire EW1 shown in FIG. 2A is a collective twist of enamel wires, and the twist direction is formed by either S (right) twist or Z (left) twist, and the finished outer diameter is about 2. 5 mm.

図２Ｂに示す接地線ＥＷ２は、図２Ａに示すようなリッツ線を一次撚り線１０３とし、一次撚り線１０３の束をさらに複数（図２Ｂでは計１９束）撚り合わせて二次撚り線１０４とした複合撚り線である（図２Ｂは導体の公称断面積６０ｍｍ２用）。一次撚り線１０３は子撚り、二次撚り線１０４は親撚りとも呼ばれる。 The ground wire EW2 shown in FIG. 2B has a litz wire as shown in FIG. 2A as a primary stranded wire 103, and a plurality of bundles of primary stranded wires 103 (a total of 19 bundles in FIG. 2B) are twisted together to form a secondary stranded wire 104. (FIG. 2B is for a conductor having a nominal cross-sectional area of 60 mm 2 ). The primary stranded wire 103 is also called a child stranded wire, and the secondary stranded wire 104 is also called a parent stranded wire.

図２Ｂでは、親撚りとしての二次撚り線１０４は、中心から外側に向かって、１束、６束、１２束の同心撚り構造を有する。ここでは、同心撚りの最も中心側を第１撚り層と呼び、撚り層が複数ある場合は、以降、外側に向かって順に、第２撚り層、第３撚り層、第４撚り層と呼ぶ。図２Ｂでは、中心１束の外側に同心状に撚られる６束を第１撚り層１０４ａ、その外側の１２束を第２撚り層１０４ｂとする。   In FIG. 2B, the secondary stranded wire 104 as the main twist has a concentric stranded structure of 1 bundle, 6 bundles, and 12 bundles from the center to the outside. Here, the most central side of the concentric twist is referred to as a first twist layer, and when there are a plurality of twist layers, they are hereinafter referred to as a second twist layer, a third twist layer, and a fourth twist layer in order toward the outside. In FIG. 2B, six bundles twisted concentrically on the outer side of one central bundle are defined as a first twisted layer 104a, and the outer twelve bundles are defined as a second twisted layer 104b.

一次撚り線１０３を構成する素線１００の撚り方向と、二次撚り線１０４における各撚り層における一次撚り線１０３の束の撚り方向は、逆向きであることが好ましい。言い換えると、親撚りと子撚りの撚り方向は逆向きであることが好ましい。   It is preferable that the twist direction of the strand 100 which comprises the primary strand 103, and the twist direction of the bundle of the primary strand 103 in each twist layer in the secondary strand 104 are reverse directions. In other words, it is preferable that the twist directions of the parent twist and the child twist are opposite to each other.

図２Ｂの場合のような、二次撚り線１０４が同心撚り構造である場合について、具体的に説明する。まず、撚り線の最外層の撚り方向は、接地線をＪＩＳ規格準拠とするためには、Ｓ（右）撚りとすることが好ましい。よって、図２Ｂの構成においては、第２撚り層１０４ｂが二次撚り線１０４の最外層であるため、最外層である第２撚り層１０４ｂにおける一次撚り線１０３の束の撚り方向はＳ（右）撚りとしている。この場合、第２撚り層１０４ｂを構成する各一次撚り線１０３の素線１００の撚り方向（１２束の各子撚りの撚り方向）は、親撚りとは逆向きのＺ（左）撚りとするのが好ましい。   A case where the secondary stranded wire 104 has a concentric stranded structure as in the case of FIG. 2B will be specifically described. First, the twisting direction of the outermost layer of the stranded wire is preferably S (right) twist in order to make the ground wire compliant with JIS standard. 2B, since the second twisted layer 104b is the outermost layer of the secondary twisted wire 104, the twist direction of the bundle of the primary twisted wires 103 in the second twisted layer 104b that is the outermost layer is S (right ) Twisted. In this case, the twist direction of the strand 100 of each primary strand 103 constituting the second twist layer 104b (twist direction of each of the 12 bundles of the child strands) is a Z (left) twist in the direction opposite to the parent twist. Is preferred.

一方、二次撚り線１０４の第１撚り層１０４ａにおける一次撚り線１０３の束の撚り方向は、第２撚り層１０４ｂにおける撚り方向（Ｓ撚り）とは逆向きのＺ撚りとするのが好ましい。この場合、第１撚り層１０４ａを構成する各一次撚り線１０３の素線１００の撚り方向（６束の各子撚りの撚り方向）は、親撚りとは逆向きのＳ撚りとするのが好ましい。また、その外側に第１撚り層１０４ａが形成される、二次撚り線１０４の中心の１束を構成する一次撚り線１０３の素線１００の撚り方向も、同様に、第１撚り層１０４ａにおける親撚りとは逆向きのＳ撚りとするのが好ましい。このように、Ｓ撚り、Ｚ撚りについては、撚り線の最外層をＳ撚りとすることを基準に決定する。   On the other hand, the twist direction of the bundle of primary stranded wires 103 in the first stranded layer 104a of the secondary stranded wire 104 is preferably a Z twist opposite to the twist direction (S twist) in the second stranded layer 104b. In this case, it is preferable that the twist direction of the strands 100 of each primary strand 103 constituting the first twist layer 104a (the twist direction of each of the six bundles of the child strands) is an S twist opposite to the parent twist. . Moreover, the twist direction of the strand 100 of the primary strand 103 which comprises one bundle | flux of the center of the secondary strand 104 in which the 1st strand layer 104a is formed in the outer side is similarly in the 1st strand layer 104a. The S twist is preferably opposite to the parent twist. Thus, about S twist and Z twist, it determines based on making the outermost layer of a strand wire into S twist.

二次撚り線１０４は、第１撚り層１０４ａより外側に、更に１つ（第２撚り層１０４ｂ）または複数の撚り層（第３撚り層以上の撚り層）を有する場合、隣接する撚り層（例えば、第１撚り層１０４ａと第２撚り層１０４ｂ）における一次撚り線１０３の束の撚り方向は互いに逆向きとするのが好ましい。すなわち、二次撚り線が複数の撚り層で形成される場合は、撚り層毎に撚り方向が交互に逆向き（例えば、第１撚り層：Ｚ撚り、第２撚り層：Ｓ撚り、第３撚り層：Ｚ撚り、・・・）となるように形成することが好ましい。   When the secondary stranded wire 104 further includes one (second stranded layer 104b) or a plurality of stranded layers (twisted layers equal to or more than the third stranded layer) outside the first stranded layer 104a, the adjacent stranded layer ( For example, it is preferable that the twist directions of the bundles of the primary strands 103 in the first twist layer 104a and the second twist layer 104b) are opposite to each other. That is, when the secondary stranded wire is formed of a plurality of twisted layers, the twist directions are alternately reversed for each twist layer (for example, the first twist layer: Z twist, the second twist layer: S twist, the third It is preferable to form a twisted layer: Z twisted.

さらに、各撚り層を構成する各一次撚り線１０３の素線１００の撚り方向（各子撚りの方向）は、その撚り層における一次撚り線１０３の束の撚り方向（親撚りの方向）とは逆向き（例えば、親撚りがＺ撚りである撚り層における子撚りはＳ撚り）に形成するのが好ましい。   Furthermore, the twist direction (the direction of each child twist) of the strand 100 of each primary strand 103 constituting each twist layer is the twist direction (the direction of the parent twist) of the bundle of the primary strands 103 in the twist layer. It is preferable to form in the reverse direction (for example, the child twist in the twist layer whose parent twist is Z twist is S twist).

これにより、接地線ＥＷ２に可撓性を持たせることができる。また、交互に逆向きにすることで、同心撚りを形成し易く、仕上がり外径を安定させることができる。なお、図２Ｂに示す接地線ＥＷ２の仕上がり外径は、約１２．３ｍｍである。   Thereby, the grounding wire EW2 can be flexible. Moreover, by making it reverse direction alternately, it is easy to form a concentric twist, and a finished outer diameter can be stabilized. The finished outer diameter of the ground wire EW2 shown in FIG. 2B is about 12.3 mm.

図２Ｃに示す接地線ＥＷ３は、図２Ｂに示すようなリッツ線（二次撚り線１０４）に対して、セパレーター１０５を介在させて外被１０６を形成した外被付きリッツ線である。セパレーター１０５には、例えばナイロンフィルム等が適用される。外被１０６には、例えば耐燃架橋ポリエチレン等が適用される。接地線ＥＷ３は、地上に露出する部分（例えば、立ち上げ線１３や接地網１２の屋内配線）等に使用される。図２Ｃに示す接地線ＥＷ３の仕上がり外径は、約１５．５ｍｍである。   A grounding wire EW3 shown in FIG. 2C is a litz wire with a jacket in which a jacket 106 is formed by interposing a separator 105 with respect to the litz wire (secondary stranded wire 104) as shown in FIG. 2B. For example, a nylon film or the like is applied to the separator 105. For the jacket 106, for example, flame-resistant crosslinked polyethylene or the like is applied. The ground line EW3 is used for a portion exposed to the ground (for example, the rising line 13 or the indoor wiring of the grounding network 12). The finished outer diameter of the ground wire EW3 shown in FIG. 2C is about 15.5 mm.

なお、接地線ＥＷ（ＥＷ１〜ＥＷ３）を構成する素線１００の外径、撚り本数等は、実施の形態で示すものに制限されず、任意に選択される。また、素線１００の導体１０１には、銅の他、銅合金、アルミニウム、アルミニウム合金、又はこれらの二重構造からなるクラッド材（例えば銅クラッドアルミニウム）等を適用することができる。   In addition, the outer diameter of the strand 100 which comprises the grounding wire EW (EW1-EW3), a twist number, etc. are not restrict | limited to what is shown in embodiment, but are selected arbitrarily. In addition to copper, a copper alloy, aluminum, an aluminum alloy, or a clad material (for example, copper clad aluminum) made of a double structure thereof can be applied to the conductor 101 of the strand 100.

接地システム１において、接地線ＥＷに交流電流が流れるとき、周波数が高くなるに従い、導体内部に比べて導体表面における電流密度が高くなり、実効の導体断面積が小さくなるため、インピーダンスが上昇する（表皮効果）。接地線ＥＷに用いられるリッツ線は、径の小さい素線のそれぞれが絶縁された構造を有しており、高周波電流通電時の電流分布の偏りが生じにくく、雷サージ通電時の表皮効果によるインピーダンスの上昇を抑制することができる。また、接地線ＥＷにリッツ線を用いることにより、接地線ＥＷを格子状又は環状に配置する際に、容易に接地線ＥＷを曲げることができ、接地線ＥＷを敷設する際の作業性が、従来使用されているＩＶ線に比べて格段に向上する。   In the grounding system 1, when an alternating current flows through the grounding wire EW, as the frequency increases, the current density on the conductor surface increases as compared with the inside of the conductor, and the effective conductor cross-sectional area decreases, so that the impedance increases ( Skin effect). The litz wire used for the grounding wire EW has a structure in which each of the small-diameter strands is insulated, and it is difficult for the current distribution to be biased when the high-frequency current is applied, and the impedance due to the skin effect when the lightning surge is applied Can be suppressed. Further, by using a litz wire as the ground wire EW, the ground wire EW can be easily bent when the ground wire EW is arranged in a lattice shape or in an annular shape, and workability when laying the ground wire EW is improved. Compared to the IV line used in the past, it is much improved.

接地線ＥＷの端末部には、接地網１２、立ち上げ線１３及び極接地線１４の接続を容易に形成するために、例えば銅又は銅合金からなる圧縮端子等の金属端子３０（図３参照）が接続される。   A metal terminal 30 (see FIG. 3) such as a compression terminal made of copper or a copper alloy, for example, is formed in the terminal portion of the ground wire EW in order to easily form the connection of the ground net 12, the rising wire 13 and the polar ground wire 14. ) Is connected.

図３は、金属端子３０の一例を示す斜視図である。
図３に示す金属端子３０は、他の接地線ＥＷの金属端子３０や被接地体２０の端子等に接続される先端接続部３１と、接地線ＥＷに接続される電線接続部３２を有する圧縮銅管端子である。 FIG. 3 is a perspective view showing an example of the metal terminal 30.
The metal terminal 30 shown in FIG. 3 includes a tip connection portion 31 connected to the metal terminal 30 of another ground wire EW, a terminal of the grounded body 20, and the like, and a wire connection portion 32 connected to the ground wire EW. It is a copper tube terminal.

電線接続部３２は、筒形状を有し、一端側（先端側）が閉塞され、他端側（後端側）に接地線ＥＷの先端部が挿入される挿入孔３２ａを有する。電線接続部３２は、接地線ＥＷと機械的に接続する際にかしめられる部分（本実施の形態では圧縮される部分）であり、所定長が確保される。   The electric wire connection part 32 has a cylindrical shape, has one end side (front end side) closed, and has an insertion hole 32a into which the front end part of the ground wire EW is inserted on the other end side (rear end side). The wire connection portion 32 is a portion that is caulked when mechanically connected to the ground wire EW (a portion that is compressed in the present embodiment), and a predetermined length is ensured.

先端接続部３１は、電線接続部３２に連設される板状の部分である。先端接続部３１は、ボルトを挿通するボルト穴３１ａを有する。ボルト穴３１ａに接続対象（例えば、他の金属端子）の穴（図示略）を合わせ、ボルト穴３１ａにボルトを挿通してボルト締めすることにより、接地線ＥＷは、接続先（例えば、他の接地線ＥＷ）と容易かつ強固に接続される。   The tip connection portion 31 is a plate-like portion that is connected to the wire connection portion 32. The tip connection part 31 has a bolt hole 31a through which a bolt is inserted. By aligning a hole (not shown) of a connection target (for example, another metal terminal) with the bolt hole 31a, inserting the bolt into the bolt hole 31a and tightening the bolt, the ground wire EW is connected to the connection destination (for example, other It is easily and firmly connected to the ground line EW).

図４Ａ〜図４Ｅは、接地線ＥＷ（リッツ線）の端末接続方法を示す図である。   4A to 4E are diagrams illustrating a terminal connection method of the ground wire EW (Litz wire).

まず、図４Ａに示すように、接地線ＥＷの先端部に、長手軸に沿って所定長の切込みＥＷａを形成する（Ａ工程）。切込みＥＷａによって、接地線ＥＷの導体素線１００の切り込まれた部分に絶縁皮膜１０２のない面が現れる。切込みＥＷａの長さを、接地線ＥＷの撚りピッチ以上とした場合は、接地線ＥＷの導体素線１００のすべてについて絶縁皮膜１０２のない面が現れる。切込みＥＷａは、例えば、電動のこぎりによって形成することができる。   First, as shown in FIG. 4A, a notch EWa having a predetermined length is formed along the longitudinal axis at the tip of the ground wire EW (step A). Due to the cut EWa, a surface without the insulating film 102 appears in the cut portion of the conductor wire 100 of the ground wire EW. When the length of the cut EWa is equal to or greater than the twist pitch of the ground wire EW, a surface without the insulating film 102 appears on all the conductor strands 100 of the ground wire EW. The cut EWA can be formed by, for example, an electric saw.

次に、図４Ｂに示すように、切込みＥＷａに導通部材３３を挿嵌し（Ｂ工程）、更に図４Ｃに示すように、導通部材３３を接地線ＥＷに沿って湾曲形状に形成する。導通部材３３は、例えば、厚さ０．２ｍｍの銅板である。このとき、切込みＥＷａと導通部材３３の長手方向に沿う接触長さを、接地線ＥＷの撚りピッチよりも長くすると、導通部材３３が素線１００のすべてについて絶縁皮膜１０２のない面が現れた切込みＥＷａに対して導通部材３３を挿嵌するので、電気的接続の点で好ましい。   Next, as shown in FIG. 4B, the conducting member 33 is inserted into the cut Ewa (step B), and further, as shown in FIG. 4C, the conducting member 33 is formed in a curved shape along the ground line EW. The conducting member 33 is, for example, a copper plate having a thickness of 0.2 mm. At this time, when the contact length along the longitudinal direction of the cut EWA and the conductive member 33 is made longer than the twisting pitch of the ground wire EW, the cut in which the conductive member 33 has a surface without the insulation film 102 appears on all the strands 100. Since the conducting member 33 is inserted into the EWa, it is preferable in terms of electrical connection.

導通部材３３は、全体としてＳ字形状となり、実施の形態では接地線ＥＷのほぼ全周を覆う。なお、導通部材３３は、予めＳ字形状に加工されていてもよい。導通部材３３において、切込みＥＷａに挿嵌された部分が接地線ＥＷの導体１０１と接触し（導体接触部）、接地線ＥＷの外周面に沿って湾曲形状に形成された部分が電線接続部３２と接触する（端子接触部）。   The conductive member 33 is formed in an S shape as a whole, and covers substantially the entire circumference of the ground wire EW in the embodiment. The conducting member 33 may be processed into an S shape in advance. In the conductive member 33, the portion inserted into the cut EWa is in contact with the conductor 101 of the ground wire EW (conductor contact portion), and the portion formed in a curved shape along the outer peripheral surface of the ground wire EW is the electric wire connection portion 32. (Contact part of terminal).

次に、図４Ｄに示すように、導通部材３３が挿嵌された接地線ＥＷの先端部を、絶縁皮膜を除去することなく、金属端子３０の電線接続部３２の挿入孔３２ａに挿入する（Ｃ工程）。   Next, as shown to FIG. 4D, the front-end | tip part of the ground wire EW in which the conduction | electrical_connection member 33 was inserted is inserted in the insertion hole 32a of the electric wire connection part 32 of the metal terminal 30, without removing an insulating film ( Step C).

次に、図４Ｅに示すように、電線接続部３２を、かしめる（Ｄ工程）。具体的に、本実施の形態では、六角ダイス等の専用工具（図示略）により圧縮する。これにより、切込みＥＷａによって現れる接地線ＥＷの導体１０１と電線接続部３２とが、導通部材３３を介して電気的に接続される。つまり、本実施の形態では、切込みＥＷａの形成によって表面に現れる絶縁皮膜１０２のない切断面を、通電経路として利用する。また、接地線ＥＷと電線接続部３２とが、機械的に接続される。以上、Ａ工程、Ｂ工程、Ｃ工程、Ｄ工程の順に行うことにより接地線ＥＷの端子接続部Ｊが組み立てられる。   Next, as shown to FIG. 4E, the electric wire connection part 32 is crimped (D process). Specifically, in the present embodiment, compression is performed using a dedicated tool (not shown) such as a hexagonal die. Thereby, the conductor 101 of the ground wire EW that appears by the cut Ewa and the electric wire connection portion 32 are electrically connected via the conducting member 33. That is, in the present embodiment, a cut surface without the insulating film 102 that appears on the surface due to the formation of the cut EWA is used as the energization path. Moreover, the ground wire EW and the electric wire connection part 32 are mechanically connected. As described above, the terminal connection portion J of the ground wire EW is assembled by performing the A process, the B process, the C process, and the D process in this order.

図５Ａ〜図５Ｃは、本実施の形態に係る接地線ＥＷの端子接続部Ｊを示す図である。図５Ａは端子接続部Ｊの平面図であり、図５Ｂは端子接続部Ｊの長手軸に沿う縦断面図であり、図５Ｃは図５Ｂにおける矢視断面図である。   5A to 5C are diagrams showing the terminal connection portion J of the ground wire EW according to the present embodiment. 5A is a plan view of the terminal connecting portion J, FIG. 5B is a longitudinal sectional view along the longitudinal axis of the terminal connecting portion J, and FIG. 5C is a sectional view taken along the arrow in FIG. 5B.

図５Ａ〜図５Ｃに示すように、端子接続部Ｊでは、接地線ＥＷが電線接続部３２に挿入された状態で電線接続部３２がかしめられていることにより機械的に接続される。本実施の形態では、圧縮によってかしめられている。また、接地線ＥＷの導体１０１と金属端子３０の電線接続部３２とが、接地線ＥＷの切込みＥＷａに挿嵌された導通部材３３を介して電気的に接続される。端子接続部Ｊにおいては、接地線ＥＷと金属端子３０とは、主として切込みＥＷａによって現れる切断面を介して電流が流れることになる。   As shown in FIGS. 5A to 5C, the terminal connection portion J is mechanically connected by caulking the wire connection portion 32 with the ground wire EW inserted into the wire connection portion 32. In the present embodiment, it is caulked by compression. In addition, the conductor 101 of the ground line EW and the electric wire connection portion 32 of the metal terminal 30 are electrically connected via a conducting member 33 inserted into the cut EWa of the ground line EW. In the terminal connection portion J, a current flows between the ground wire EW and the metal terminal 30 mainly through a cut surface that appears by the cut EWa.

このように、本実施の形態に係る接地線ＥＷ（リッツ線）の端子接続部Ｊは、導体１０１の外周面に絶縁皮膜１０２が施された複数の導体素線１００を撚り合わせてなる接地線ＥＷの先端部と、接地線ＥＷの先端部が挿入される筒状の電線接続部３２を有する金属端子３０と、接地線ＥＷの長手軸に沿って形成された所定長の切込みＥＷａに挿嵌される導通部材３３と、を備える。電線接続部３２に挿入された接地線ＥＷの先端部において切込みＥＷａに導通部材３３が挿嵌された状態で電線接続部３２をかしめる（本実施の形態では圧縮する）ことにより、切込みＥＷａによって現れる接地線ＥＷの導体１０１と電線接続部３２とが、導通部材３３を介して電気的に接続されるとともに、接地線ＥＷと電線接続部３２とが機械的に接続される。   As described above, the terminal connection portion J of the ground wire EW (Litz wire) according to the present embodiment is a ground wire formed by twisting a plurality of conductor strands 100 having the insulating film 102 applied to the outer peripheral surface of the conductor 101. Inserted into a tip end of EW, a metal terminal 30 having a cylindrical wire connecting portion 32 into which a tip end of the ground wire EW is inserted, and a notch EWa of a predetermined length formed along the longitudinal axis of the ground wire EW A conducting member 33 to be provided. By caulking (compressing in the present embodiment) the wire connection portion 32 with the conducting member 33 inserted into the cut EWa at the tip of the ground wire EW inserted into the wire connection portion 32, the cut EWa The conductor 101 of the grounding wire EW that appears and the electric wire connection portion 32 are electrically connected via the conducting member 33, and the grounding wire EW and the electric wire connection portion 32 are mechanically connected.

また、本実施の形態に係る接地線ＥＷの端子接続方法は、導体１０１の外周面に絶縁皮膜１０２が施された複数の導体素線１００を撚り合わせてなる接地線ＥＷの先端部に、接地線ＥＷの先端部が挿入される筒状の電線接続部３２を有する金属端子３０を接続する接地線ＥＷの端子接続方法である。端子接続方法は、接地線ＥＷの先端部に、長手軸に沿って所定長の切込みＥＷａを形成するＡ工程（図４Ａ参照）と、切込みＥＷａに導通部材３３を挿嵌するＢ工程（図４Ｂ、図４Ｃ参照）と、導通部材３３が挿嵌された接地線ＥＷの先端部を、絶縁皮膜１０２を除去することなく電線接続部３２に挿入するＣ工程（図４Ｄ参照）と、電線接続部３２を圧縮し、切込みＥＷａによって現れる接地線ＥＷの導体１０１と電線接続部３２とを導電部材３３を介して電気的に接続するとともに、接地線ＥＷと電線接続部とを機械的に接続するＤ工程（図４Ｅ参照）と、を備える。   In addition, the terminal connection method for the ground wire EW according to the present embodiment is such that the ground wire EW is formed by twisting a plurality of conductor wires 100 each having an insulating film 102 applied to the outer peripheral surface of the conductor 101. This is a terminal connection method of the ground wire EW for connecting the metal terminal 30 having the cylindrical wire connection portion 32 into which the tip of the wire EW is inserted. The terminal connection method includes a process A (see FIG. 4A) in which a predetermined length of cut EWa is formed along the longitudinal axis at the tip of the ground wire EW, and a process B in which the conductive member 33 is inserted into the cut EWa (FIG. 4B). 4C), a C step (see FIG. 4D) for inserting the tip of the ground wire EW into which the conducting member 33 is inserted into the electric wire connecting portion 32 without removing the insulating film 102, and an electric wire connecting portion. 32, the conductor 101 of the grounding wire EW that appears by the cut EWa and the wire connecting portion 32 are electrically connected via the conductive member 33, and the grounding wire EW and the wire connecting portion are mechanically connected. And a process (see FIG. 4E).

端子接続部Ｊにおいて、接地線ＥＷと金属端子３０との電気的接続は、切込みＥＷａの形成によって表面に現れる絶縁皮膜１０２のない切断面に、導通部材３３を押し当てて密着させることにより行われる。端子接続部Ｊは、従来のように時間がかかる接地線ＥＷの絶縁皮膜１０２の直接的な除去作業を必要とせず、代わりに切込みＥＷаを形成して導通部材３３を挿嵌した状態でかしめればよいので、作業者が熟練していなくても短時間で容易に組み立てることができる。さらには、端子接続部Ｊは、従来のように長時間のバーナーによる加熱も必要ないので、安全性の面でも優れる。したがって、実施の形態に係る端子接続部Ｊ及び端子接続方法によれば、端子接続部Ｊにおいて電気的及び機械的に安定した品質を容易に実現することができる。   In the terminal connection portion J, the electrical connection between the ground wire EW and the metal terminal 30 is performed by pressing and bringing the conductive member 33 into close contact with a cut surface without the insulating film 102 that appears on the surface due to the formation of the cut EWa. . The terminal connection portion J does not require the direct removal work of the insulating film 102 of the ground wire EW which is time-consuming as in the prior art, and instead is crimped in a state in which the conductive member 33 is inserted by forming the cut EWа. Therefore, even if the operator is not skilled, it can be assembled easily in a short time. Furthermore, since the terminal connection portion J does not require heating with a burner for a long time as in the prior art, it is excellent in terms of safety. Therefore, according to the terminal connection part J and the terminal connection method which concern on embodiment, the quality stable electrically and mechanically in the terminal connection part J is easily realizable.

以上、本発明者によってなされた発明を実施の形態に基づいて具体的に説明したが、本発明は上記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で変更可能である。   As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the above embodiment, and can be changed without departing from the gist thereof.

例えば、実施の形態において、接地線ＥＷの先端部に、切込みＥＷａを複数形成してもよい（図６参照）。図６には、接地線ＥＷの先端部に、切込みＥＷａを２本、全体として切込みＥＷａを十字状に形成した場合について示している。この場合、切込みＥＷａに対応する形状を有する導通部材３３を、切込みＥＷａに挿嵌することになる。   For example, in the embodiment, a plurality of cuts EWa may be formed at the tip of the ground wire EW (see FIG. 6). FIG. 6 shows a case where two cuts EWa and a cut EWa as a whole are formed in a cross shape at the tip of the ground wire EW. In this case, the conductive member 33 having a shape corresponding to the cut Ewa is inserted into the cut Ewa.

また例えば、導通部材３３は、接地線ＥＷの切込みＥＷａに挿嵌された状態で、接地線ＥＷの径方向両側に突出していればよく、実施の形態のように、接地線ＥＷの全周を覆っていなくてもよい。   Further, for example, the conductive member 33 only has to protrude to both sides in the radial direction of the ground wire EW in a state of being inserted into the cut EWa of the ground wire EW, and the entire circumference of the ground wire EW as in the embodiment. It does not have to be covered.

また、導通部材３３において、切込みＥＷａに挿嵌される部分は、平板状であってもよいし、楔状であってもよい。   Further, in the conductive member 33, the portion inserted into the cut EWA may be a flat plate shape or a wedge shape.

また、上記実施の形態では、電線接続部３２は、一端側（先端側）が閉塞された金属端子３０について説明したが、一端側（先端側）が開放されている金属端子でもよい。この場合は、接地線ＥＷを電線接続部３２に挿入後に、開放された金属端子の先端側から導通部材３３を切込みＥＷａに挿嵌し、その後、電線接続部３２をかしめてもよい。すなわち、Ａ工程、Ｃ工程、Ｂ工程、Ｄ工程の順に行ってもよい。防水処理の作業性の観点では前述の、電線接続部３２の一端側（先端側）が閉塞された金属端子３０の方が好ましい。   Moreover, although the electric wire connection part 32 demonstrated the metal terminal 30 by which the one end side (tip side) was obstruct | occluded in the said embodiment, the metal terminal by which the one end side (tip side) was open | released may be sufficient. In this case, after inserting the ground wire EW into the electric wire connecting portion 32, the conducting member 33 may be cut from the front end side of the opened metal terminal and inserted into the EWA, and then the electric wire connecting portion 32 may be caulked. That is, you may perform in order of A process, C process, B process, and D process. From the viewpoint of workability of waterproofing treatment, the above-described metal terminal 30 in which one end side (tip side) of the electric wire connection portion 32 is closed is preferable.

さらに、上記実施の形態では、接地線ＥＷの先端部に、長手軸に沿って所定長の切込みＥＷａを形成するＡ工程を第１工程としているが、Ａ工程は、予め半田付けにより接地線ＥＷの先端部（切込みＥＷａの長さより若干長い程度）を固めておく工程を含んでもよい。この場合は、直接接地線ＥＷに切込みＥＷａを形成する前述の場合に比べて、接地線ＥＷの先端部が半田で硬くなっているため、Ａ工程において、接地線ＥＷの先端部に、電動のこぎり等によって、長手軸に沿って所定長の切込みＥＷａを形成する際に、作業性がよい。この場合でも、電線接続部３２に挿入された接地線ＥＷの切込みＥＷａに導通部材３３を挿嵌された状態で電線接続部３２をかしめる（本実施の形態では、圧縮する）ことにより、切込みＥＷａによって現れる接地線ＥＷの導体１０１と電線接続部３２とが、導通部材３３を介して電気的に接続されるとともに、接地線ＥＷと電線接続部３２とが機械的に接続される。   Furthermore, in the above-described embodiment, the first step is the A step of forming a predetermined length of cut EWa along the longitudinal axis at the tip of the ground wire EW. However, in the A step, the ground wire EW is preliminarily soldered. May include a step of solidifying the tip portion (approximately slightly longer than the length of the cut Ewa). In this case, the tip of the ground wire EW is hardened by solder as compared with the above-described case in which the cut EWa is formed directly in the ground wire EW. Therefore, in step A, an electric saw is attached to the tip of the ground wire EW. For example, when the cut Ewa having a predetermined length is formed along the longitudinal axis, the workability is good. Even in this case, the wire connection portion 32 is caulked (compressed in the present embodiment) with the conductive member 33 inserted into the cut EWa of the ground wire EW inserted into the wire connection portion 32, thereby making the cut. The conductor 101 of the ground wire EW that appears by EWa and the electric wire connection portion 32 are electrically connected via the conducting member 33, and the ground wire EW and the electric wire connection portion 32 are mechanically connected.

さらに、実施の形態においては、金属端子３０の電線接続部３２を圧縮によりかしめる場合について説明したが、圧着工具または圧着機による圧着によってかしめてもよい。   Furthermore, although the case where the electric wire connection part 32 of the metal terminal 30 was crimped by compression was demonstrated in embodiment, you may crimp by crimping with a crimping tool or a crimping machine.

今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。   The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

１ 接地システム
１１ 接地極
１２ 接地網
１３ 立ち上げ線
１４ 極接続線
２０ 被接地体
３０ 金属端子
３１ 先端接続部
３２ 電線接続部
３２ａ 挿入孔
３３ 導通部材
１００ 素線
１０１ 導体
１０２ 絶縁皮膜
ＥＷ、ＥＷ１〜ＥＷ３ 接地線
Ｊ 端子接続部 DESCRIPTION OF SYMBOLS 1 Grounding system 11 Grounding electrode 12 Grounding network 13 Startup line 14 Electrode connection line 20 Grounded body 30 Metal terminal 31 Tip connection part 32 Electric wire connection part 32a Insertion hole 33 Conductive member 100 Wire 101 Conductor 102 Insulation film EW, EW1 EW3 Ground wire J Terminal connection

Claims (9)

導体の外周面に絶縁皮膜が施された複数の導体素線を撚り合わせてなるリッツ線の先端部と、
前記リッツ線の先端部が挿入される筒状の電線接続部を有する金属端子と、
前記リッツ線の長手軸に沿って形成された所定長の切込みに挿嵌される導通部材と、を備え、
前記電線接続部に挿入された前記リッツ線の先端部において前記切込みに前記導通部材が挿嵌された状態で前記電線接続部をかしめることにより、前記切込みによって現れる前記リッツ線の導体と前記電線接続部とが、前記導通部材を介して電気的に接続されるとともに、前記リッツ線と前記電線接続部とが機械的に接続されることを特徴とするリッツ線の端子接続部。 A tip portion of a litz wire formed by twisting a plurality of conductor wires each having an insulating film applied to the outer peripheral surface of the conductor;
A metal terminal having a cylindrical wire connecting portion into which the tip of the litz wire is inserted;
A conduction member inserted into a predetermined length of cut formed along the longitudinal axis of the litz wire, and
The conductor of the litz wire and the electric wire appearing by the notch by caulking the wire connecting part with the conducting member inserted into the notch at the tip of the litz wire inserted into the wire connecting part. A connection part is electrically connected via the conducting member, and the litz wire and the electric wire connection part are mechanically connected. 前記導通部材は、前記切込みに挿嵌された状態で前記リッツ線の径方向両側に突出することを特徴とする請求項１に記載のリッツ線の端子接続部。   2. The litz wire terminal connection portion according to claim 1, wherein the conductive member protrudes on both sides in the radial direction of the litz wire in a state of being inserted into the notch. 前記導通部材は、前記リッツ線の前記導体と接触する導体接触部と、前記リッツ線の外周面に沿って湾曲形状に形成され前記電線接続部と接触する端子接触部と、を有することを特徴とする請求項２に記載のリッツ線の端子接続部。   The conductive member has a conductor contact portion that contacts the conductor of the litz wire, and a terminal contact portion that is formed in a curved shape along the outer peripheral surface of the litz wire and contacts the wire connection portion. The terminal connection part of the litz wire of Claim 2. 前記切込みと前記導通部材の長手方向に沿う接触長さは、前記リッツ線の撚りピッチよりも長いことを特徴とする請求項１から３のいずれか一項に記載のリッツ線の端子接続部。   4. The terminal connection portion of the litz wire according to claim 1, wherein a contact length along the longitudinal direction of the notch and the conducting member is longer than a twist pitch of the litz wire. 前記切込みを形成する前記リッツ線の先端部は予め半田で固められていることを特徴とする請求項１から４のいずれか一項に記載のリッツ線の端子接続部。   The terminal connection part of the litz wire as described in any one of Claim 1 to 4 by which the front-end | tip part of the said litz wire which forms the said notch is hardened with the solder beforehand. 導体の外周面に絶縁皮膜が施された複数の導体素線を撚り合わせてなるリッツ線の先端部に、前記リッツ線の先端部が挿入される筒状の電線接続部を有する金属端子を接続するリッツ線の端子接続方法であって、
（Ａ）前記リッツ線の先端部に、長手軸に沿って所定長の切込みを形成する工程と、
（Ｂ）前記切込みに導通部材を挿嵌する工程と、
（Ｃ）前記導通部材が挿嵌された前記リッツ線の先端部を、前記絶縁皮膜を除去することなく前記電線接続部に挿入する工程と、
（Ｄ）前記電線接続部をかしめて、前記切込みによって現れる前記リッツ線の導体と前記電線接続部とを前記導通部材を介して電気的に接続するとともに、前記リッツ線と前記電線接続部とを機械的に接続する工程と、
を備えることを特徴とするリッツ線の端子接続方法。 Connect a metal terminal having a cylindrical wire connection part into which the leading end of the litz wire is inserted into the leading end of the litz wire, which is formed by twisting together a plurality of conductor strands having an insulating film applied to the outer peripheral surface of the conductor. A terminal connection method for litz wire,
(A) forming a notch of a predetermined length along the longitudinal axis at the tip of the litz wire;
(B) inserting a conductive member into the notch;
(C) inserting the leading end portion of the litz wire into which the conductive member is inserted into the electric wire connecting portion without removing the insulating film;
(D) Caulking the electric wire connecting part, electrically connecting the conductor of the Litz wire that appears by the cut and the electric wire connecting part via the conductive member, and connecting the Litz wire and the electric wire connecting part. A mechanical connection step;
The terminal connection method of the litz wire characterized by comprising. 前記（Ａ）工程、前記（Ｂ）工程、前記（Ｃ）工程、前記（Ｄ）工程の順に行うことを特徴とする請求項６に記載のリッツ線の端子接続方法。   7. The litz wire terminal connection method according to claim 6, wherein the step (A), the step (B), the step (C), and the step (D) are performed in this order. 前記（Ａ）工程、前記（Ｃ）工程、前記（Ｂ）工程、前記（Ｄ）工程の順に行うことを特徴とする請求項６に記載のリッツ線の端子接続方法。   7. The litz wire terminal connection method according to claim 6, wherein the step (A), the step (C), the step (B), and the step (D) are performed in this order. 前記（Ａ）工程は、前記切込みを形成する前記リッツ線の先端部を予め半田で固める工程を含むことを特徴とする請求項６から８のいずれか一項に記載のリッツ線の端子接続方法。   The method of connecting a litz wire according to any one of claims 6 to 8, wherein the step (A) includes a step of preliminarily soldering a tip portion of the litz wire forming the cut. .
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