JP2012174545A

JP2012174545A - Arrester

Info

Publication number: JP2012174545A
Application number: JP2011036330A
Authority: JP
Inventors: Hideki Aiki; 秀樹相木; Tatsuya Ishizu; 達也石津
Original assignee: Chugoku Electric Power Co Inc
Current assignee: Chugoku Electric Power Co Inc
Priority date: 2011-02-22
Filing date: 2011-02-22
Publication date: 2012-09-10
Anticipated expiration: 2031-02-22
Also published as: JP5642586B2

Abstract

PROBLEM TO BE SOLVED: To provide an arrester capable of easily and surely securing an electrical connection to a high voltage pulling-down insulation wire and exerting a stable lightning protection performance for a long period.SOLUTION: The arrester 100 comprises: a terminal member 201 being disposed in the arrester body which houses a cylinder-type fuse having a pair of terminals, the terminal member 201 being formed with a conductive material and electrically connected to one terminal arranged at a power supply side among the pair of terminals; an insulation member 202 being formed with an insulating material and holding an end part of an electric wire 103 having a sheath 103b in such a state that insulation between the electric wire 103 and the terminal member 201 is secured; and a fastening screw 203 being formed with a conductive material, and screwed to the terminal member 201 in such a manner that the screw 203 penetrates the sheath 103b of the electric wire 103 held by the insulation member 202 so that the terminal member 201 and a core wire 103a of the electric wire 103 are electrically connected.

Description

この発明は、電柱などに設置される避雷器に関する。 The present invention relates to a lightning arrester installed on a utility pole or the like.

避雷器は、たとえば、高圧電線や当該高圧電線から引き下げられた高圧引下用絶縁電線への落雷による雷サージ電流電圧を素早く対地へ流すために、送配電路の途中などに設けられる。従来、たとえば、高圧引下用絶縁電線の先端部分に接続される線路側端子を備え、当該線路側端子に対して高圧引下用絶縁電線の先端部分を締め付けネジを用いてネジ止めすることによって、当該高圧引下用絶縁電線と避雷器本体とを電気的に接続するようにした避雷器があった（たとえば、下記非特許文献１、２を参照。）。 The lightning arrester is provided, for example, in the middle of a transmission / distribution path in order to quickly flow a lightning surge current voltage caused by a lightning strike to a high-voltage electric wire or a high-voltage pull-down insulated electric wire pulled down from the high-voltage electric wire. Conventionally, for example, by providing a line-side terminal connected to the tip portion of the high-voltage pull-down insulated wire, and screwing the tip portion of the high-voltage pull-down insulated wire to the line-side terminal using a tightening screw There has been a lightning arrester in which the insulated wire for high-voltage pulling and the lightning arrester body are electrically connected (for example, see Non-Patent Documents 1 and 2 below).

このような従来の避雷器においては、たとえば、高圧引下用絶縁電線の先端部分の被覆をカッターナイフなどを用いて剥ぎ取って芯線を露出させ、露出させた芯線をステンレス製のプレート部材に挿入し、プレート部材を介して芯線に食い込むようにして当該プレート部材に締め付けネジを螺合させて線路側端子に対して芯線をネジ止めすることによって、高圧引下用絶縁電線を避雷器本体に固定するとともに高圧引下用絶縁電線と避雷器本体とを電気的に接続するようにしていた。 In such a conventional lightning arrester, for example, the coating of the tip portion of the high voltage pulling insulated wire is peeled off with a cutter knife or the like to expose the core wire, and the exposed core wire is inserted into a stainless steel plate member. In addition to fixing the high-voltage pull-down insulated wire to the lightning arrester body by screwing the fastening screw into the plate member so as to bite into the core wire via the plate member and screwing the core wire to the line side terminal The high voltage pulling insulated wire and the lightning arrester body were electrically connected.

具体的には、たとえば、導体サイズが１４ｍｍ²（１４スケア：１芯の中の一本一本の銅線の断面積が１４平方ミリメートル）の高圧引下用絶縁電線と避雷器とを電気的に接続する作業に際しては、まず、カッターナイフなどを用いて高圧引下用絶縁電線の先端から２ｃｍ程度の範囲における被覆を剥ぎ取って芯線を露出させ、露出させた芯線をステンレス製のプレート部材に挿入する。そして、たとえば、ネジ規格Ｍ５の締め付けネジ（外径が５ｍｍの雄ネジ）を用いて、当該締め付けネジがプレート部材を貫通して芯線に食い込むようにして線路側端子に締め付けネジを螺合させる。これによって、高圧引下用絶縁電線を避雷器本体に固定するとともに高圧引下用絶縁電線と避雷器本体とを電気的に接続するようにしていた。 Specifically, for example, an insulated wire for high-voltage pulling and a lightning arrester having a conductor size of 14 mm ² (14 square: cross-sectional area of each copper wire in one core is 14 square millimeters) are electrically connected. When connecting, first use a cutter knife or the like to peel off the coating in a range of about 2 cm from the tip of the insulated wire for high-voltage pulling to expose the core wire, and insert the exposed core wire into the stainless steel plate member. To do. Then, for example, using a tightening screw of a screw standard M5 (a male screw having an outer diameter of 5 mm), the tightening screw is screwed into the line terminal so that the tightening screw penetrates the plate member and bites into the core wire. As a result, the high voltage pulling insulated electric wire is fixed to the lightning arrester main body and the high voltage pulling insulated electric wire and the lightning arrester main body are electrically connected.

日本高圧電気株式会社、ＣＦ遮断器ＮｉｐｐｏｎＫｏｕａｔｓｕＥｌｅｃｔｒｉｃＣｏ．ＣＡＴ．０３０Ｅ、ｐ４−５、［ｏｎｌｉｎｅ］、［平成２２年１２月２７日検索］、インターネット＜ｈｔｔｐ：／／ｗｗｗ．ｎｋｅｃｏ．ｃｏ．ｊｐ／ｄｏｗｎｌｏａｄ／０１ｃｕｔｏｕｔ／ＣＦ＿ｃａｔａｌｏｇ．ｐｄｆ＞Nippon High Voltage Electric Co., Ltd., CF Circuit Breaker Nippon Koutsu Electric Co. CAT. 030E, p4-5, [online], [December 27, 2010 search], Internet <http: // www. nkeco. co. jp / download / 01cutout / CF_catalog. pdf> 株式会社戸上電機製作所、アレスタ、ｐ１、［ｏｎｌｉｎｅ］、［平成２２年１２月２７日検索］、インターネット＜ｈｔｔｐ：／／ｗｗｗ．ｔｏｇａｍｉ−ｅｌｅｃ．ｃｏ．ｊｐ／ｐｒｏｄｕｃｔｓ／ｐｄｆ／ｚｌ．ｐｄｆ＞Tojo Electric Manufacturing Co., Ltd., Arrester, p1, [online], [Search on December 27, 2010], Internet <http: // www. togami-elec. co. jp / products / pdf / zl. pdf>

しかしながら、上述した従来の技術は、高圧引下用絶縁電線の被覆をカッターナイフで剥ぎ取る際に芯線に傷が入る場合があった。線路側端子に螺合させた芯線に傷が入っている場合、高圧引下用絶縁電線に鳥がとまったり高圧引下用絶縁電線が強風によって煽られたりすることに起因して当該高圧引下用絶縁電線が振動したり揺動したりすると、加えられた衝撃によって芯線が傷の部分から屈曲しやすくなり、屈曲した部分から芯線の疲労断線が生じやすくなるという問題があった。 However, in the conventional technique described above, there is a case where the core wire is damaged when the coating of the high-voltage pull-down insulated electric wire is removed with a cutter knife. If the core wire screwed to the line terminal is damaged, the high-voltage pull-down cable is caused by a bird trapped on the high-voltage pull-down insulated cable or the high-voltage draw-insulated cable being beaten by a strong wind. When the insulated electric wire vibrates or swings, there is a problem that the core wire is easily bent from the scratched portion due to the applied impact, and fatigue breakage of the core wire is easily generated from the bent portion.

また、上述した従来の技術は、高圧引下用絶縁電線において被覆を剥がした部分の長さが長すぎる場合、高圧引下用絶縁電線に鳥がとまったり高圧引下用絶縁電線が強風によって煽られたりすることに起因して当該高圧引下用絶縁電線が振動したり揺動したりすると、加えられた外力によって芯線がステンレス製のプレート部材の縁部分から屈曲しやすくなり、屈曲した部分から芯線の疲労断線が生じやすくなるという問題があった。 Further, in the conventional technique described above, when the length of the stripped portion of the high-voltage pull-down insulated wire is too long, birds are trapped on the high-voltage pull-down insulated wire or the high-voltage pull-down insulated wire is damaged by strong wind. If the insulated wire for high-voltage pulling vibrates or swings due to being applied, the applied external force makes it easier for the core wire to bend from the edge of the stainless steel plate member. There has been a problem that fatigue breakage of the core wire is likely to occur.

このように、上述した従来の技術は、鳥が多く生息する場所や強風が発生しやすい場所などの避雷器の設置場所や、高圧引下用絶縁電線の余長が長いなどの避雷器の設置状況によっては、余剰分の芯線の一部あるいは全部が疲労断線しやすくなるという問題があった。たとえば、芯線の一部が疲労断線した場合は高圧引下用絶縁電線と避雷器との電気的な接続が不安定になる。また、芯線の全部が疲労断線し、露出した芯線が避雷器の外部に位置する状態となった場合、充電された芯線が金物などに接触して地絡事故が発生する。 In this way, the above-described conventional technology depends on the location of the lightning arrester such as a place where many birds live or where strong winds are likely to occur, or the installation situation of the lightning arrester such as a long extra length of high voltage pulling insulated wire. However, there is a problem that part or all of the excess core wire is easily broken. For example, when a part of the core wire is fatigued, the electrical connection between the high voltage pulling insulated wire and the lightning arrester becomes unstable. In addition, when all the core wires are fatigued and the exposed core wires are located outside the lightning arrester, the charged core wires come into contact with hardware or the like and a ground fault occurs.

この発明は、上述した従来技術による問題点を解消するため、高圧引下用絶縁電線との電気的な接続を容易かつ確実に確保することができ、長期にわたって安定した避雷性能を発揮することができる避雷器を提供することを目的とする。 In order to eliminate the above-mentioned problems caused by the prior art, the present invention can easily and surely secure an electrical connection with the high-voltage drawn insulated wire, and can exhibit stable lightning protection performance over a long period of time. The purpose is to provide a possible lightning arrester.

上述した課題を解決し、目的を達成するため、この発明にかかる避雷器は、一対の端子を備えた筒型ヒューズを収容する避雷器本体と、前記避雷器本体に設けられ、導電材料を用いて形成され、前記一対の端子のうち電源側に設けられた一方の端子に電気的に接続された端子部材と、前記避雷器本体に設けられ、絶縁材料によって形成され、被覆を備える電線の先端部を当該電線と前記端子部材との間における絶縁を確保した状態で保持する絶縁部材と、導電材料を用いて形成され、前記絶縁部材が保持する前記電線の被覆を貫通するように前記端子部材に螺合され、前記端子部材と前記電線の芯線とを電気的に接続する締め付けネジと、を備えたことを特徴とする。 In order to solve the above-described problems and achieve the object, a lightning arrester according to the present invention is provided with a lightning arrester body that accommodates a cylindrical fuse having a pair of terminals, and is provided in the lightning arrester body, and is formed using a conductive material. A terminal member electrically connected to one terminal provided on the power source side of the pair of terminals, and a tip portion of the electric wire provided on the lightning arrester body, formed of an insulating material, and provided with a covering. And an insulating member that holds the insulating member between the terminal member and the terminal member, and is formed using a conductive material, and is screwed into the terminal member so as to penetrate the sheath of the electric wire held by the insulating member. And a fastening screw for electrically connecting the terminal member and the core wire of the electric wire.

また、この発明にかかる避雷器は、上記の発明において、前記締め付けネジが、前記絶縁部材を介して前記電線の被覆を貫通するように前記端子部材に螺合されることを特徴とする。 The lightning arrester according to the present invention is characterized in that, in the above-described invention, the fastening screw is screwed to the terminal member so as to penetrate the coating of the electric wire through the insulating member.

また、この発明にかかる避雷器は、上記の発明において、前記端子部材の負荷側において当該端子部材を支持し、加えられた外力に応じて変形するとともに当該外力が除去された場合は元の形状に復帰する弾性を示す支持部材を備えたことを特徴とする。 In addition, the lightning arrester according to the present invention supports the terminal member on the load side of the terminal member in the above invention, and deforms according to the applied external force and returns to its original shape when the external force is removed. It is characterized by comprising a support member that exhibits resiliency to return.

また、この発明にかかる避雷器は、上記の発明において、前記絶縁部材が、電源側の端部において、電源側が突出するように湾曲した形状をなすことを特徴とする。 The lightning arrester according to the present invention is characterized in that, in the above invention, the insulating member has a curved shape so that the power source side protrudes at an end on the power source side.

また、この発明にかかる避雷器は、上記の発明において、前記絶縁部材が、少なくとも一端に開口部を備え、接続対象とする電線の外径と同等以上の内径の略円筒形状をなすことを特徴とする。 Further, the lightning arrester according to the present invention is characterized in that, in the above invention, the insulating member has an opening at least at one end and has a substantially cylindrical shape having an inner diameter equal to or larger than an outer diameter of a wire to be connected. To do.

また、この発明にかかる避雷器は、上記の発明において、前記開口部が、前記端子部材における電源側の端部よりも電源側に位置するように設けられ、前記絶縁部材に対する前記電線の挿入方向に対して傾斜する方向に開口することを特徴とする。 Further, the lightning arrester according to the present invention is the lightning arrester according to the above invention, wherein the opening is provided on the power supply side with respect to the power supply side end of the terminal member, and the wire is inserted in the insulating member in the insertion direction. It opens in the direction which inclines with respect to it.

また、この発明にかかる避雷器は、上記の発明において、前記端子部材が、少なくとも一端に開口部を備えた略円筒形状をなし、前記絶縁部材が、前記端子部材の内径と略同一の外径の略円筒形状をなし、当該端子部材の内側に取り外し可能に挿入されることを特徴とする。 Further, in the lightning arrester according to the present invention, in the above invention, the terminal member has a substantially cylindrical shape having an opening at least at one end, and the insulating member has an outer diameter substantially the same as the inner diameter of the terminal member. It has a substantially cylindrical shape and is detachably inserted inside the terminal member.

この発明にかかる避雷器によれば、高圧引下用絶縁電線との電気的な接続を容易かつ確実に確保することができ、長期にわたって安定した避雷性能を発揮することができるという効果を奏する。 According to the lightning arrester according to the present invention, it is possible to easily and surely ensure electrical connection with the high voltage pulling insulated electric wire, and it is possible to exhibit stable lightning arresting performance over a long period of time.

この発明にかかる実施の形態１の避雷器を示す説明図である。It is explanatory drawing which shows the lightning arrester of Embodiment 1 concerning this invention. この発明にかかる実施の形態１の避雷器の一部を示す説明図（その１）である。It is explanatory drawing (the 1) which shows a part of lightning arrester of Embodiment 1 concerning this invention. この発明にかかる実施の形態１の避雷器の一部を示す説明図（その２）である。It is explanatory drawing (the 2) which shows a part of lightning arrester of Embodiment 1 concerning this invention. この発明にかかる実施の形態１の避雷器の一部を示す説明図（その３）である。It is explanatory drawing (the 3) which shows a part of lightning arrester of Embodiment 1 concerning this invention. この発明にかかる実施の形態２の避雷器の構成を示す説明図である。It is explanatory drawing which shows the structure of the lightning arrester of Embodiment 2 concerning this invention. 絶縁部材の別の形状を示す説明図である。It is explanatory drawing which shows another shape of an insulating member.

以下に添付図面を参照して、この発明にかかる避雷器の好適な実施の形態を詳細に説明する。 Exemplary embodiments of a lightning arrester according to the present invention will be explained below in detail with reference to the accompanying drawings.

（実施の形態１）
（避雷器の構成）
まず、この発明にかかる実施の形態１の避雷器の構成について説明する。図１は、この発明にかかる実施の形態１の避雷器の構成を示す説明図である。図１においては、この発明にかかる実施の形態１の避雷器全体の外観を示している。図１において、点線で示した部分は、この発明にかかる実施の形態１の避雷器の内部構造の一部を示している。 (Embodiment 1)
(Configuration of lightning arrester)
First, the structure of the lightning arrester of Embodiment 1 concerning this invention is demonstrated. FIG. 1 is an explanatory diagram showing the configuration of the lightning arrester according to the first embodiment of the present invention. In FIG. 1, the external appearance of the whole lightning arrester of Embodiment 1 concerning this invention is shown. In FIG. 1, the part shown with the dotted line has shown a part of internal structure of the lightning arrester of Embodiment 1 concerning this invention.

図１において、この発明にかかる実施の形態１の避雷器１００は、避雷器本体１０１と、ゴムブッシュ１０２と、を備えている。避雷器１００は、避雷器本体１０１に設けられた支持バンド１０４を介して、電柱などに設置される。避雷器本体１０１は、中空形状をなす磁器であって、内側の中空部分にヒューズ筒（図示を省略する）を収容している。 In FIG. 1, a lightning arrester 100 according to a first embodiment of the present invention includes a lightning arrester main body 101 and a rubber bush 102. The lightning arrester 100 is installed on a utility pole or the like via a support band 104 provided on the lightning arrester main body 101. The lightning arrester body 101 is a porcelain having a hollow shape, and a fuse cylinder (not shown) is accommodated in an inner hollow portion.

ヒューズ筒は、可溶体を備えた可溶子、キャップ、ホルダ、アダプタなどによって構成されている。可溶子は、磁気性の絶縁筒の内部に、銀などによって形成された可溶体と、当該可溶体の周囲に充填される砂などの消弧剤と、によって構成されている。ヒューズ筒は、避雷器本体１０１の内側において、ボルトやナットなどを用いて避雷器本体１０１に固定されている。 The fuse cylinder includes a fusible element, a cap, a holder, an adapter, and the like provided with a fusible body. The fusible element is composed of a fusible body formed of silver or the like inside a magnetic insulating cylinder, and an arc extinguishing agent such as sand filled around the fusible body. The fuse cylinder is fixed to the lightning arrester main body 101 using bolts, nuts, or the like inside the lightning arrester main body 101.

また、ヒューズ筒は、一対の端子を備えている。ヒューズ筒が備える一対の端子のうち、一方の端子は、避雷器本体１０１においてヒューズ筒よりも電源側に設けられた上部固定電極に電気的に接続され、他方の端子は、避雷器本体１０１においてヒューズ筒よりも接地側に設けられた下部固定電極に電気的に接続されている。ヒューズ筒については、公知の技術を用いて容易に実現可能であるため説明を省略する。 The fuse cylinder has a pair of terminals. Of the pair of terminals provided in the fuse cylinder, one terminal is electrically connected to the upper fixed electrode provided on the power source side of the fuse cylinder in the lightning arrester body 101, and the other terminal is the fuse cylinder in the surge arrester body 101. It is electrically connected to the lower fixed electrode provided on the ground side. Since the fuse cylinder can be easily realized using a known technique, the description thereof is omitted.

ゴムブッシュ１０２は、避雷器本体１０１と、高圧印加用電線などの電線１０３（電線１０３の芯線１０３ａ）と、の接続部分をカバーする。電線１０３は、芯線１０３ａと、当該芯線１０３ａを外周から覆う被覆１０３ｂと、を備えている。ゴムブッシュ１０２は、より具体的には、避雷器本体１０１に設けられた端子部材（図２における符号２０１を参照）、絶縁部材（図２における符号２０２を参照）、締め付けネジ（図２における符号２０３を参照）などを覆い、端子部材、絶縁部材、締め付けネジなどが風雨に直接さらされることによる端子部材、絶縁部材、締め付けネジなどの劣化を防止する。 The rubber bush 102 covers a connection portion between the lightning arrester body 101 and an electric wire 103 (core wire 103a of the electric wire 103) such as a high-voltage applying electric wire. The electric wire 103 includes a core wire 103a and a covering 103b that covers the core wire 103a from the outer periphery. More specifically, the rubber bush 102 includes a terminal member (see reference numeral 201 in FIG. 2), an insulating member (see reference numeral 202 in FIG. 2), a fastening screw (reference numeral 203 in FIG. 2) provided on the lightning arrester body 101. Etc.) to prevent deterioration of the terminal member, insulating member, tightening screw and the like due to direct exposure of the terminal member, insulating member, tightening screw and the like to the wind and rain.

ゴムブッシュ１０２の頂部には、接続対象とする電線１０３を、ゴムブッシュ１０２と避雷器本体１０１とによって形成される空間内に導入するための導入孔１０２ａが設けられている。導入孔１０２ａは、ゴムブッシュ１０２と避雷器本体１０１とによって形成される空間の内側と外側とを連通する。導入孔１０２ａの内径は、避雷器１００への接続対象とする電線１０３の外径よりも大きい。 An introduction hole 102 a for introducing the electric wire 103 to be connected into a space formed by the rubber bush 102 and the lightning arrester body 101 is provided at the top of the rubber bush 102. The introduction hole 102a communicates the inside and the outside of the space formed by the rubber bush 102 and the lightning arrester body 101. The inner diameter of the introduction hole 102 a is larger than the outer diameter of the electric wire 103 to be connected to the lightning arrester 100.

図２、図３および図４は、この発明にかかる実施の形態１の避雷器の一部を示す説明図である。図２および図４においては、この発明にかかる実施の形態１の避雷器の一部を切断した状態を示している。図２、図３および図４において、避雷器本体１０１とゴムブッシュ１０２とによって形成される空間内には、端子部材２０１と、絶縁部材２０２と、締め付けネジ２０３と、が設けられている。 2, 3 and 4 are explanatory views showing a part of the lightning arrester according to the first embodiment of the present invention. 2 and 4 show a state in which a part of the lightning arrester according to the first embodiment of the present invention is cut. 2, 3, and 4, a terminal member 201, an insulating member 202, and a tightening screw 203 are provided in a space formed by the lightning arrester body 101 and the rubber bush 102.

端子部材（ステンレスプレート）２０１は、上部固定電極よりも電源側に設けられている。端子部材２０１は、導電材料を用いて形成されている。端子部材２０１は、具体的には、たとえば、ステンレスなどの金属材料を用いて形成されている。端子部材２０１は、上部固定電極に電気的に接続されている。これにより、端子部材２０１は、一対の端子のうち電源側に設けられた一方の端子に電気的に接続されている。 The terminal member (stainless plate) 201 is provided on the power supply side with respect to the upper fixed electrode. The terminal member 201 is formed using a conductive material. Specifically, the terminal member 201 is formed using metal materials, such as stainless steel, for example. The terminal member 201 is electrically connected to the upper fixed electrode. Thereby, the terminal member 201 is electrically connected to one terminal provided on the power source side of the pair of terminals.

端子部材２０１は、略円筒形状をなし、軸心方向における一端に開口部２０１ａを備えている。開口部２０１ａは、端子部材２０１の軸心方向における電源側の端部に設けられている。端子部材２０１の他端は、閉塞されている。端子部材２０１は、底のある略円筒形状をなしている。 The terminal member 201 has a substantially cylindrical shape and includes an opening 201a at one end in the axial direction. The opening 201 a is provided at the end on the power source side in the axial direction of the terminal member 201. The other end of the terminal member 201 is closed. The terminal member 201 has a substantially cylindrical shape with a bottom.

端子部材２０１において、当該端子部材２０１の他端側には、図示を省略する水抜き孔が設けられている。水抜き孔は、避雷器１００が設置された状態において、端子部材２０１における下端あるいはその近傍に設けられていることが好ましい。略円筒形状をなす端子部材２０１は、少なくとも電源側の一端に開口部２０１ａを備えていればよく、両端に開口部２０１ａを備えていてもよい。 In the terminal member 201, a drain hole (not shown) is provided on the other end side of the terminal member 201. The drain hole is preferably provided at the lower end of the terminal member 201 or in the vicinity thereof in a state where the lightning arrester 100 is installed. The terminal member 201 having a substantially cylindrical shape only needs to have the opening 201a at least at one end on the power supply side, and may have the opening 201a at both ends.

端子部材２０１は、締め付けネジ２０３が螺合される、図示を省略する孔を備えている。端子部材２０１が備える締め付けネジ２０３が螺合される孔は、たとえば、内周面が平滑であって、端子部材２０１の半径方向に当該端子部材２０１を貫通する形状とすることができる。あるいは、端子部材２０１が備える締め付けネジ２０３が螺合される孔は、たとえば、内周面に締め付けネジ２０３のピッチと同じピッチのネジ山が設けられた、端子部材２０１の半径方向に当該端子部材２０１を貫通する形状であってもよい。 The terminal member 201 includes a hole (not shown) into which the fastening screw 203 is screwed. The hole into which the fastening screw 203 included in the terminal member 201 is screwed may have, for example, a smooth inner peripheral surface and a shape that penetrates the terminal member 201 in the radial direction of the terminal member 201. Alternatively, the hole into which the fastening screw 203 included in the terminal member 201 is screwed is, for example, the terminal member in the radial direction of the terminal member 201 provided with a screw thread having the same pitch as the pitch of the fastening screw 203 on the inner peripheral surface. The shape which penetrates 201 may be sufficient.

端子部材２０１の負荷側には、支持部材２０４が設けられている。支持部材２０４は、端子部材２０１の負荷側において当該端子部材２０１を支持する。支持部材２０４は、加えられた外力に応じて変形するとともに、変形した状態において外力が除去された場合は元の形状に復帰する弾性を示す。具体的には、支持部材２０４は、たとえば、金属材料を用いて形成されたスプリングによって実現することができる。 A support member 204 is provided on the load side of the terminal member 201. The support member 204 supports the terminal member 201 on the load side of the terminal member 201. The support member 204 is deformed according to the applied external force and exhibits elasticity that returns to its original shape when the external force is removed in the deformed state. Specifically, the support member 204 can be realized by, for example, a spring formed using a metal material.

スプリングによって支持部材２０４を実現する場合、支持部材２０４を実現するスプリングは、当該スプリングの軸心方向が端子部材２０１の軸心方向に揃うように配置される。これにより、スプリングによって実現される支持部材２０４は、外力が加えられた場合に、負荷側を支点として、負荷側よりも電源側が大きく変動するように揺動可能とされる。また、スプリングによって実現される支持部材２０４は、加えられた外力が除去された場合に、元の形状に復帰し、電線１０３（電線１０３の芯線１０３ａ）は長さ方向に直線状態とされる。 When the support member 204 is realized by a spring, the spring that realizes the support member 204 is arranged so that the axial direction of the spring is aligned with the axial direction of the terminal member 201. As a result, when an external force is applied, the support member 204 realized by a spring can be swung so that the power source side fluctuates more greatly than the load side with the load side as a fulcrum. Further, when the applied external force is removed, the support member 204 realized by the spring returns to the original shape, and the electric wire 103 (the core wire 103a of the electric wire 103) is in a linear state in the length direction.

絶縁部材２０２は、端子部材２０１の内側に設けられている。絶縁部材２０２は、絶縁材料によって形成されている。絶縁部材２０２は、具体的には、たとえば、ポリエチレンなどの高い絶縁性を有するプラスチックなどの絶縁材料によって形成されている。絶縁部材２０２は、被覆１０３ｂを備える電線１０３の先端部を、当該電線１０３と前記端子部材２０１との間における絶縁を確保した状態で保持する。 The insulating member 202 is provided inside the terminal member 201. The insulating member 202 is made of an insulating material. Specifically, the insulating member 202 is formed of an insulating material such as plastic having high insulating properties such as polyethylene. The insulating member 202 holds the distal end portion of the electric wire 103 including the coating 103b in a state in which insulation between the electric wire 103 and the terminal member 201 is ensured.

この実施の形態１において、絶縁部材２０２は、略円筒形状をなす。略円筒形状をなす絶縁部材２０２は、接続対象とする電線１０３の外径と同等以上の内径の略円筒形状をなしている。略円筒形状をなす絶縁部材２０２の内径は、接続対象とする電線１０３の外径と同等、あるいは、接続対象とする電線１０３の外径よりも若干大きいことが好ましい。 In the first embodiment, the insulating member 202 has a substantially cylindrical shape. The insulating member 202 having a substantially cylindrical shape has a substantially cylindrical shape with an inner diameter equal to or greater than the outer diameter of the electric wire 103 to be connected. The inner diameter of the substantially cylindrical insulating member 202 is preferably equal to or slightly larger than the outer diameter of the electric wire 103 to be connected.

略円筒形状をなす絶縁部材２０２の内径を、接続対象とする電線１０３の外径と同等、あるいは、接続対象とする電線１０３の外径よりも若干大きくすることにより、電線１０３の先端を絶縁部材２０２に容易かつ確実に挿入することができるとともに、絶縁部材２０２の内側に挿入された電線１０３が絶縁部材２０２に対してがたつくことを防止することができる。これによって、絶縁部材２０２の内側に挿入された電線１０３が絶縁部材２０２に対してがたつき、電線１０３と絶縁部材２０２とが擦れることに起因する電線１０３の劣化を抑制することができる。 By making the inner diameter of the insulating member 202 having a substantially cylindrical shape equal to the outer diameter of the electric wire 103 to be connected or slightly larger than the outer diameter of the electric wire 103 to be connected, the tip of the electric wire 103 is connected to the insulating member. It can be easily and reliably inserted into 202, and the electric wire 103 inserted inside the insulating member 202 can be prevented from rattling against the insulating member 202. Thereby, the electric wire 103 inserted inside the insulating member 202 rattles against the insulating member 202, and deterioration of the electric wire 103 due to the friction between the electric wire 103 and the insulating member 202 can be suppressed.

絶縁部材２０２は、端子部材２０１の内径と略同一の外径の略円筒形状をなしている。絶縁部材２０２は、端子部材２０１に対して取り外し可能な状態で端子部材２０１の内側に挿入される。絶縁部材２０２と端子部材２０１との組み合わせは、避雷器１００への接続対象となる電線１０３の外径（電線１０３の種類）に応じて、適宜変更することができる。具体的には、たとえば、上部電極に固定された端子部材２０１は変えずに、当該端子部材２０１に組み合わせる絶縁部材２０２の内径（絶縁部材２０２の外周面をなす部材の厚さ）を調整することができる。 The insulating member 202 has a substantially cylindrical shape with an outer diameter substantially the same as the inner diameter of the terminal member 201. The insulating member 202 is inserted inside the terminal member 201 in a detachable state with respect to the terminal member 201. The combination of the insulating member 202 and the terminal member 201 can be changed as appropriate according to the outer diameter (type of the electric wire 103) of the electric wire 103 to be connected to the lightning arrester 100. Specifically, for example, without changing the terminal member 201 fixed to the upper electrode, the inner diameter of the insulating member 202 combined with the terminal member 201 (the thickness of the member forming the outer peripheral surface of the insulating member 202) is adjusted. Can do.

絶縁部材２０２は、軸心方向における一端に設けられた開口部２０２ａを備えている。絶縁部材２０２の他端は、閉塞されている。絶縁部材２０２は、底のある円筒形状をなしている。開口部２０２ａは、絶縁部材２０２の軸心方向における電源側の端部に設けられている。開口部２０２ａは、絶縁部材２０２が端子部材２０１の中に挿入された状態において、端子部材２０１における電源側の端部よりも電源側に位置するように設けられている。 The insulating member 202 includes an opening 202a provided at one end in the axial direction. The other end of the insulating member 202 is closed. The insulating member 202 has a cylindrical shape with a bottom. The opening 202 a is provided at the end on the power source side in the axial direction of the insulating member 202. The opening 202 a is provided so as to be positioned on the power supply side with respect to the end on the power supply side of the terminal member 201 in a state where the insulating member 202 is inserted into the terminal member 201.

絶縁部材２０２において、当該端子部材２０１の他端側には、図示を省略する水抜き孔が設けられている。水抜き孔は、避雷器１００が設置された状態において、端子部材２０１における下端あるいはその近傍に設けられていることが好ましい。また、水抜き孔は、端子部材２０１が備える水抜き孔と重複する位置あるいはその近傍に位置するように設けられていることが好ましい。 In the insulating member 202, a drain hole (not shown) is provided on the other end side of the terminal member 201. The drain hole is preferably provided at the lower end of the terminal member 201 or in the vicinity thereof in a state where the lightning arrester 100 is installed. Moreover, it is preferable that the drain hole is provided so that it may be located in the position which overlaps with the drain hole with which the terminal member 201 is provided, or its vicinity.

また、開口部２０２ａは、絶縁部材２０２に対する電線１０３の挿入方向、すなわち略円筒形状をなす絶縁部材２０２の軸心方向に対して傾斜する方向に開口している。これにより、負荷側の端部からの長さは、開口部２０２ａの周縁上の位置によって異なっている。開口部２０２ａは、絶縁部材２０２の軸心方向に平行な平面で絶縁部材２０２を切断した場合の断面において、絶縁部材２０２の軸心方向に直交する平面に対し、開口部２０２ａの周縁が形成する円が傾斜するように開口している。 The opening 202a opens in the direction in which the electric wire 103 is inserted into the insulating member 202, that is, in a direction inclined with respect to the axial direction of the insulating member 202 having a substantially cylindrical shape. As a result, the length from the end on the load side varies depending on the position on the periphery of the opening 202a. The opening 202a has a peripheral edge of the opening 202a with respect to a plane orthogonal to the axial direction of the insulating member 202 in a cross section when the insulating member 202 is cut along a plane parallel to the axial direction of the insulating member 202. Open so that the circle is inclined.

開口部２０２ａは、絶縁部材２０２に対する電線１０３の挿入方向に対して傾斜した方向に開口しているため、開口部２０２ａの開口径は、絶縁部材２０２に挿入可能な電線１０３の外径よりも大きくなる。開口部２０２ａの開口径を電線１０３の外径よりも大きくすることにより、開口部２０２ａを絶縁部材２０２の軸心方向と同方向に開口させた場合と比較して、絶縁部材２０２を大型化することなく、絶縁部材２０２に挿入された電線１０３の自由度を大きくすることができる。これにより、絶縁部材２０２に挿入された電線１０３が振動や揺動した際に、当該電線１０３が開口部２０２ａの周縁と擦れることを抑制し、芯線１０３ａの疲労断線を抑制することができる。 Since the opening 202a opens in a direction inclined with respect to the insertion direction of the electric wire 103 with respect to the insulating member 202, the opening diameter of the opening 202a is larger than the outer diameter of the electric wire 103 that can be inserted into the insulating member 202. Become. By making the opening diameter of the opening 202 a larger than the outer diameter of the electric wire 103, the insulating member 202 is made larger than when the opening 202 a is opened in the same direction as the axial center direction of the insulating member 202. The degree of freedom of the electric wire 103 inserted into the insulating member 202 can be increased. Thereby, when the electric wire 103 inserted in the insulating member 202 vibrates or swings, the electric wire 103 can be prevented from rubbing against the peripheral edge of the opening 202a, and fatigue breakage of the core wire 103a can be suppressed.

絶縁部材２０２は、電源側の端部すなわち開口部２０２ａの周縁部分において、電源側が突出するように湾曲した形状をなしている。絶縁部材２０２の電源側の端部における湾曲した形状は、たとえば、開口部２０２ａを形成する周縁部分を丸めることによって実現することができる（図４を参照）。 The insulating member 202 has a curved shape so that the power source side protrudes at an end portion on the power source side, that is, a peripheral portion of the opening 202a. The curved shape at the end on the power source side of the insulating member 202 can be realized, for example, by rounding the peripheral edge portion that forms the opening 202a (see FIG. 4).

この実施の形態１の絶縁部材２０２は、電源側の一端に開口部２０２ａを備え、負荷側の他端が閉塞された略円筒形状をなすため、当該絶縁部材２０２を端子部材２０１の内側に収容することにより、端子部材２０１の内面を絶縁材料によって被覆することができる。これによって、絶縁部材２０２が保持する電線１０３の芯線１０３ａと端子部材２０１とが接触することを防止することができ、当該電線１０３の芯線１０３ａと端子部材２０１とが電気的に直接接続されることを防止することができる。なお、略円筒形状をなす絶縁部材２０２は、少なくとも電源側の一端に開口部２０２ａを備えていればよく、両端に開口部２０２ａを備えていてもよい。 The insulating member 202 according to the first embodiment has an opening 202a at one end on the power supply side and has a substantially cylindrical shape with the other end on the load side closed, so that the insulating member 202 is accommodated inside the terminal member 201. By doing so, the inner surface of the terminal member 201 can be covered with an insulating material. As a result, the contact between the core wire 103a of the electric wire 103 held by the insulating member 202 and the terminal member 201 can be prevented, and the core wire 103a of the electric wire 103 and the terminal member 201 are electrically connected directly. Can be prevented. The insulating member 202 having a substantially cylindrical shape may be provided with an opening 202a at least at one end on the power supply side, and may be provided with openings 202a at both ends.

絶縁部材２０２は、締め付けネジ２０３が螺合される、図示を省略する孔を備えている。絶縁部材２０２が備える締め付けネジ２０３が螺合される孔は、絶縁部材２０２が端子部材２０１内に収容された状態において、端子部材２０１が備える締め付けネジ２０３が螺合される孔と重なる位置に設けられている。 The insulating member 202 includes a hole (not shown) into which the fastening screw 203 is screwed. The hole into which the fastening screw 203 provided in the insulating member 202 is screwed is provided at a position overlapping the hole into which the fastening screw 203 provided in the terminal member 201 is screwed in a state where the insulating member 202 is accommodated in the terminal member 201. It has been.

絶縁部材２０２が備える締め付けネジ２０３が螺合される孔は、たとえば、内周面が平滑であって、絶縁部材２０２の半径方向に当該端子部材２０１を貫通する形状とすることができる。あるいは、絶縁部材２０２が備える締め付けネジ２０３が螺合される孔は、たとえば、内周面に締め付けネジ２０３のピッチと同じピッチのネジ山が設けられた、絶縁部材２０２の半径方向に当該端子部材２０１を貫通する形状であってもよい。 The hole into which the tightening screw 203 provided in the insulating member 202 is screwed may have, for example, a smooth inner peripheral surface and a shape that penetrates the terminal member 201 in the radial direction of the insulating member 202. Alternatively, the hole into which the fastening screw 203 included in the insulating member 202 is screwed is, for example, the terminal member in the radial direction of the insulating member 202 provided with a thread having the same pitch as the pitch of the fastening screw 203 on the inner peripheral surface. The shape which penetrates 201 may be sufficient.

締め付けネジ２０３は、導電材料を用いて形成されている。締め付けネジ２０３は、外周面にネジ山が設けられた軸部２０３ａと、軸部２０３ａの一端に設けられた頭部２０３ｂと、を備えている。軸部２０３ａの軸心方向における長さは、端子部材２０１の半径方向における寸法（端子部材２０１の厚さ）と、絶縁部材２０２の半径方向における長さ（絶縁部材２０２の厚さ）と、電線１０３の被覆１０３ｂの厚さと、を加算した寸法よりも長い。 The fastening screw 203 is formed using a conductive material. The tightening screw 203 includes a shaft portion 203a having a thread on the outer peripheral surface and a head portion 203b provided at one end of the shaft portion 203a. The length in the axial direction of the shaft portion 203a is the dimension in the radial direction of the terminal member 201 (the thickness of the terminal member 201), the length in the radial direction of the insulating member 202 (the thickness of the insulating member 202), and the electric wire. It is longer than the dimension obtained by adding the thickness of the cover 103b of 103.

また、軸部２０３ａの軸心方向における長さは、端子部材２０１の厚さと絶縁部材２０２の厚さと電線１０３の被覆１０３ｂの厚さとを加算した寸法よりも長く、かつ、端子部材２０１の厚さと絶縁部材２０２の厚さと電線１０３の被覆１０３ｂの厚さと電線１０３の芯線１０３ａの直径とを加算した寸法よりも短いものであってもよい。 The length of the shaft portion 203a in the axial direction is longer than the dimension obtained by adding the thickness of the terminal member 201, the thickness of the insulating member 202, and the thickness of the covering 103b of the electric wire 103, and the thickness of the terminal member 201. It may be shorter than the dimension obtained by adding the thickness of the insulating member 202, the thickness of the coating 103b of the electric wire 103, and the diameter of the core wire 103a of the electric wire 103.

この場合、端子部材２０１の外周側から締め付けネジ２０３を螺合する際に、締め付けネジ２０３の頭部２０３ｂが端子部材２０１の外周面に当接するまで当該締め付けネジ２０３を螺合した状態において、端子部材２０１に螺合された状態の締め付けネジ２０３の先端は、電線１０３の芯線１０３ａに突き刺さり、かつ、電線１０３の芯線１０３ａを貫通しない。 In this case, when the fastening screw 203 is screwed from the outer peripheral side of the terminal member 201, the terminal in the state where the fastening screw 203 is screwed until the head 203 b of the fastening screw 203 comes into contact with the outer peripheral surface of the terminal member 201. The tip of the fastening screw 203 screwed to the member 201 pierces the core wire 103 a of the electric wire 103 and does not penetrate the core wire 103 a of the electric wire 103.

軸部２０３ａの他端は、先端ほど細く鋭く尖った形状とされている。締め付けネジ２０３は、絶縁部材２０２が保持する（絶縁部材２０２に挿入された）電線１０３の被覆１０３ｂを貫通するようにして端子部材２０１に螺合される。締め付けネジ２０３は、絶縁部材２０２を介して、電線１０３の被覆１０３ｂを貫通するように端子部材２０１に螺合される。締め付けネジ２０３は、導電材料を用いて形成されているため、端子部材２０１に螺合された状態においては、端子部材２０１と電線１０３の芯線１０３ａとが締め付けネジ２０３を介して電気的に接続される。 The other end of the shaft portion 203a has a sharper and sharper shape toward the tip. The fastening screw 203 is screwed into the terminal member 201 so as to penetrate the coating 103b of the electric wire 103 held by the insulating member 202 (inserted into the insulating member 202). The fastening screw 203 is screwed to the terminal member 201 through the insulating member 202 so as to penetrate the coating 103 b of the electric wire 103. Since the fastening screw 203 is formed using a conductive material, the terminal member 201 and the core wire 103a of the electric wire 103 are electrically connected via the fastening screw 203 in a state of being screwed to the terminal member 201. The

避雷器１００は、端子部材２０１、絶縁部材２０２、締め付けネジ２０３および絶縁部材２０２に挿入された電線１０３の先端を覆うゴムブッシュ１０２を備えている。ゴムブッシュ１０２は、ゴムなどの絶縁材料を用いて形成されている。ゴムブッシュ１０２は、ゴムブッシュ１０２と避雷器本体１０１とによって形成される空間内に端子部材２０１、絶縁部材２０２、締め付けネジ２０３および絶縁部材２０２に挿入された電線１０３の先端を収容するようにして、端子部材２０１、絶縁部材２０２、締め付けネジ２０３および絶縁部材２０２に挿入された電線１０３の先端を覆う。 The lightning arrester 100 includes a terminal member 201, an insulating member 202, a fastening screw 203, and a rubber bush 102 that covers the tip of the electric wire 103 inserted into the insulating member 202. The rubber bushing 102 is formed using an insulating material such as rubber. The rubber bush 102 accommodates the terminal member 201, the insulating member 202, the fastening screw 203, and the tip of the electric wire 103 inserted into the insulating member 202 in the space formed by the rubber bush 102 and the lightning arrester body 101, The terminal member 201, the insulating member 202, the fastening screw 203, and the tip of the electric wire 103 inserted into the insulating member 202 are covered.

（避雷器の設置作業手順）
つぎに、この発明にかかる実施の形態１の避雷器の設置作業手順の一例について説明する。この発明にかかる実施の形態１の避雷器の設置作業に際しては、まず、支持バンド１０４を介して、避雷器本体１０１を電柱などの設置位置に固定する。 (Installation procedure of lightning arrester)
Below, an example of the installation work procedure of the lightning arrester of Embodiment 1 concerning this invention is demonstrated. When installing the lightning arrester according to the first embodiment of the present invention, first, the lightning arrester body 101 is fixed to an installation position such as a utility pole via the support band 104.

そして、固定された避雷器本体１０１からゴムブッシュ１０２を取り外し、端子部材２０１および絶縁部材２０２を露出させ、避雷器本体１０１から取り外されたゴムブッシュ１０２の導入孔１０２ａに接続対象とする電線１０３を通す。その後、ゴムブッシュ１０２の導入孔１０２ａを貫通させた電線１０３の先端を、開口部２０２ａを介して絶縁部材２０２の内側に挿入する。電線１０３は、被覆１０３ｂを剥ぎ取らず、芯線１０３ａの周りを被覆１０３ｂが設けられた状態のまま挿入する。 Then, the rubber bushing 102 is removed from the fixed lightning arrester main body 101, the terminal member 201 and the insulating member 202 are exposed, and the electric wire 103 to be connected is passed through the introduction hole 102a of the rubber bushing 102 removed from the lightning arrester main body 101. Thereafter, the tip of the electric wire 103 that has passed through the introduction hole 102a of the rubber bush 102 is inserted into the insulating member 202 through the opening 202a. The electric wire 103 is inserted around the core wire 103a with the covering 103b provided without stripping off the covering 103b.

電線１０３は、たとえば、電線１０３の先端が絶縁部材２０２の底に突き当たるまで挿入する。絶縁部材２０２の他端は絶縁材料によって塞がれているため、電線１０３の先端が絶縁部材２０２の底に突き当たるまで挿入した場合にも、電線１０３の芯線１０３ａと端子部材２０１とが接触することはない。この実施の形態の避雷器においては、電線１０３の先端が絶縁部材２０２の底に突き当たるまで当該電線１０３を挿入するだけで、避雷器本体１０１に対する電線１０３の位置を容易かつ確実に定めることができる。これによって、避雷器１００の設置作業にかかる作業者の負担軽減を図ることができる。 For example, the electric wire 103 is inserted until the tip of the electric wire 103 hits the bottom of the insulating member 202. Since the other end of the insulating member 202 is closed with an insulating material, the core wire 103a of the electric wire 103 and the terminal member 201 are in contact with each other even when the electric wire 103 is inserted until the tip of the electric wire 103 hits the bottom of the insulating member 202. There is no. In the lightning arrester of this embodiment, the position of the electric wire 103 with respect to the lightning arrester main body 101 can be determined easily and reliably only by inserting the electric wire 103 until the tip of the electric wire 103 hits the bottom of the insulating member 202. As a result, it is possible to reduce the burden on the worker who installs the lightning arrester 100.

つぎに、端子部材２０１に挿入された絶縁部材２０２に対して電線１０３が挿入されている状態で、端子部材２０１に締め付けネジ２０３を螺合させる。締め付けネジ２０３は、締め付けネジ２０３が絶縁部材２０２を介して電線１０３に突き刺さるようにして、端子部材２０１に螺合させる。軸部２０３ａの軸心方向における長さは、端子部材２０１の厚さと絶縁部材２０２の厚さと電線１０３の被覆１０３ｂの厚さとを加算した寸法よりも長いため、端子部材２０１に螺合された状態の締め付けネジ２０３の先端を電線１０３の芯線１０３ａに突き刺し、端子部材２０１と電線１０３の芯線１０３ａとの電気的接続を確保することができる。 Next, in the state where the electric wire 103 is inserted into the insulating member 202 inserted into the terminal member 201, the fastening screw 203 is screwed into the terminal member 201. The tightening screw 203 is screwed into the terminal member 201 such that the tightening screw 203 pierces the electric wire 103 through the insulating member 202. The length of the shaft portion 203a in the axial direction is longer than the sum of the thickness of the terminal member 201, the thickness of the insulating member 202, and the thickness of the covering 103b of the electric wire 103. The end of the fastening screw 203 can be pierced into the core wire 103 a of the electric wire 103, and electrical connection between the terminal member 201 and the core wire 103 a of the electric wire 103 can be ensured.

軸部２０３ａの軸心方向における長さを、端子部材２０１の厚さと絶縁部材２０２の厚さと電線１０３の被覆１０３ｂの厚さとを加算した寸法よりも長く、かつ、端子部材２０１の厚さと絶縁部材２０２の厚さと電線１０３の被覆１０３ｂの厚さと電線１０３の芯線１０３ａの直径とを加算した寸法よりも短くした場合、締め付けネジ２０３の頭部２０３ｂが端子部材２０１の外周面に当接するまで当該締め付けネジ２０３を螺合しても、端子部材２０１に螺合された状態の締め付けネジ２０３の先端は、電線１０３の芯線１０３ａに突き刺さり、かつ、電線１０３の芯線１０３ａを貫通しない。これによって、作業者は、端子部材２０１に対する締め付けネジ２０３の螺合量を考慮することなく、締め付けネジ２０３の頭部２０３ｂが端子部材２０１の外周面に当接するまで当該締め付けネジ２０３を螺合するだけで、容易かつ確実に、端子部材２０１と電線１０３の芯線１０３ａとの電気的接続を確保することができる。 The length of the shaft portion 203a in the axial direction is longer than the dimension obtained by adding the thickness of the terminal member 201, the thickness of the insulating member 202, and the thickness of the coating 103b of the electric wire 103, and the thickness of the terminal member 201 and the insulating member. When the thickness of 202, the thickness of the coating 103b of the electric wire 103, and the diameter of the core wire 103a of the electric wire 103 are made shorter, the tightening is performed until the head 203b of the tightening screw 203 comes into contact with the outer peripheral surface of the terminal member 201. Even if the screw 203 is screwed, the tip of the tightening screw 203 screwed to the terminal member 201 pierces the core wire 103 a of the electric wire 103 and does not penetrate the core wire 103 a of the electric wire 103. As a result, the operator screws the tightening screw 203 until the head 203b of the tightening screw 203 comes into contact with the outer peripheral surface of the terminal member 201 without considering the screwing amount of the tightening screw 203 to the terminal member 201. As a result, the electrical connection between the terminal member 201 and the core wire 103a of the electric wire 103 can be ensured easily and reliably.

その後、ゴムブッシュ１０２を、当該ゴムブッシュ１０２が端子部材２０１、絶縁部材２０２、締め付けネジ２０３および絶縁部材２０２に挿入された電線１０３の先端を覆うように避雷器本体１０１に取り付ける。これによって、避雷器１００の設置作業が完了する。 Thereafter, the rubber bushing 102 is attached to the lightning arrester body 101 so that the rubber bushing 102 covers the terminal member 201, the insulating member 202, the tightening screw 203, and the tip of the electric wire 103 inserted into the insulating member 202. Thereby, the installation work of the lightning arrester 100 is completed.

以上説明したように、この実施の形態１の避雷器１００は、一対の端子を備えた筒型ヒューズを収容する避雷器本体１０１と、避雷器本体１０１に設けられ、導電材料を用いて形成され、一対の端子のうち電源側に設けられた一方の端子に電気的に接続された端子部材２０１と、避雷器本体１０１に設けられ、絶縁材料によって形成され、被覆１０３ｂを備える電線１０３の先端部を当該電線１０３と端子部材２０１との間における絶縁を確保した状態で保持する絶縁部材２０２と、導電材料を用いて形成され、絶縁部材２０２が保持する電線１０３の被覆１０３ｂを貫通するように端子部材２０１に螺合され、端子部材２０１と電線１０３の芯線１０３ａとを電気的に接続する締め付けネジ２０３と、を備えたことを特徴としている。 As described above, the lightning arrester 100 according to the first embodiment is provided with a lightning arrester body 101 that houses a cylindrical fuse having a pair of terminals, the lightning arrester body 101, and is formed using a conductive material. The terminal member 201 electrically connected to one of the terminals provided on the power supply side, and the tip of the electric wire 103 provided on the lightning arrester main body 101, formed of an insulating material, and provided with the covering 103b are connected to the electric wire 103. The terminal member 201 is screwed into the insulating member 202 that holds the insulating member 202 in a state where insulation between the terminal member 201 and the terminal member 201 is secured, and the sheath 103b of the electric wire 103 that is formed using a conductive material and is held by the insulating member 202. And a fastening screw 203 for electrically connecting the terminal member 201 and the core wire 103a of the electric wire 103.

この発明にかかる実施の形態１の避雷器１００によれば、被覆１０３ｂを剥ぎ取ることによって電線１０３を細くすることなく、被覆１０３ｂが設けられた状態の電線１０３を締め付けネジ２０３を用いて端子部材２０１に固定するだけで、端子部材２０１と電線１０３の芯線１０３ａとを電気的に接続することができる。これによって、被覆１０３ｂを剥ぎ取る際に生じさせた傷による芯線１０３ａの劣化を防止するとともに、電線１０３が振動したり揺動したりすることに起因して芯線１０３ａにかかる外力を低減し、芯線１０３ａの疲労断線を抑制することができる。 According to the lightning arrester 100 according to the first embodiment of the present invention, the terminal member 201 is used to tighten the electric wire 103 in the state in which the covering 103b is provided by using the tightening screw 203 without thinning the electric wire 103 by peeling off the covering 103b. The terminal member 201 and the core wire 103a of the electric wire 103 can be electrically connected simply by being fixed to each other. This prevents deterioration of the core wire 103a due to scratches caused when the coating 103b is peeled off, and reduces the external force applied to the core wire 103a due to the electric wire 103 vibrating or swinging. 103a can be suppressed.

また、この発明にかかる実施の形態１の避雷器１００によれば、締め付けネジ２０３が電線１０３の被覆１０３ｂを貫通するようにして当該締め付けネジ２０３を端子部材２０１に螺合するだけで、端子部材２０１に電線１０３を固定するとともに端子部材２０１と電線１０３の芯線１０３ａとを電気的に接続することができる。これによって、避雷器１００の設置作業の容易化および作業時間の短縮を図ることができる。 Further, according to the lightning arrester 100 of the first embodiment of the present invention, the terminal member 201 is simply screwed into the terminal member 201 so that the fastening screw 203 penetrates the coating 103b of the electric wire 103. The electric wire 103 can be fixed to the terminal member 201 and the core wire 103a of the electric wire 103 can be electrically connected. Thereby, the installation work of the lightning arrester 100 can be facilitated and the working time can be shortened.

このように、この発明にかかる実施の形態１の避雷器１００によれば、電線（高圧引下用絶縁電線）１０３との電気的な接続を容易かつ確実に確保することができ、長期にわたって安定した避雷性能を発揮することができる。 As described above, according to the lightning arrester 100 of the first embodiment of the present invention, it is possible to easily and surely secure an electrical connection with the electric wire (insulated electric wire for high-voltage pull-down) 103, which is stable over a long period of time. Lightning protection performance can be demonstrated.

また、この発明にかかる実施の形態１の避雷器１００によれば、被覆１０３ｂを剥ぎ取らずに端子部材２０１と電線１０３の芯線１０３ａとを電気的に接続することができるので、廃棄物（剥ぎ取った被覆１０３ｂ）の発生を抑えることができる。これによって、近年注目されている環境問題への配慮の高い避雷器１００を提供することができる。 Further, according to the lightning arrester 100 of the first embodiment of the present invention, since the terminal member 201 and the core wire 103a of the electric wire 103 can be electrically connected without peeling off the covering 103b, waste (peeling off) Generation of the coating 103b) can be suppressed. Accordingly, it is possible to provide the lightning arrester 100 with high consideration for environmental problems that have been attracting attention in recent years.

また、この発明にかかる実施の形態１の避雷器１００によれば、被覆１０３ｂを剥ぎ取らずに端子部材２０１と電線１０３の芯線１０３ａとを電気的に接続することができるので、避雷器１００の設置作業に際して、カッターナイフなどの刃物の使用を控えることができる。これによって、避雷器１００の設置作業に際して、カッターナイフなどの刃物の使用にともなう危険を排除して避雷器１００の設置作業にかかる安全性の向上を図るとともに、作業者が携帯する工具を減らして作業者にかかる負担軽減を図ることができる。 Moreover, according to the lightning arrester 100 of Embodiment 1 concerning this invention, since the terminal member 201 and the core wire 103a of the electric wire 103 can be electrically connected without stripping off the coating 103b, the installation work of the lightning arrester 100 is possible. At this time, it is possible to refrain from using a cutter such as a cutter knife. As a result, when installing the lightning arrester 100, the danger associated with the use of a knife such as a cutter knife is eliminated to improve the safety of the installation of the lightning arrester 100, and the number of tools carried by the operator is reduced. Can be reduced.

また、この発明にかかる実施の形態１の避雷器１００は、締め付けネジ２０３が、絶縁部材２０２を介して電線１０３の被覆１０３ｂを貫通するように端子部材２０１に螺合されることを特徴としている。この発明にかかる実施の形態１の避雷器１００によれば、締め付けネジ２０３が絶縁部材２０２を介して電線１０３の被覆１０３ｂを貫通するようにして当該締め付けネジ２０３を端子部材２０１に螺合するだけで、端子部材２０１に電線１０３を固定するとともに、端子部材２０１および電線１０３に対する絶縁部材２０２の位置を固定することができる。これによって、高圧引下用絶縁電線１０３との電気的な接続を容易かつ確実に確保することができ、長期にわたって安定した避雷性能を発揮することができる避雷器１００の設置作業の容易化を図ることができる。 The lightning arrester 100 according to the first embodiment of the present invention is characterized in that the fastening screw 203 is screwed to the terminal member 201 through the insulating member 202 so as to penetrate the coating 103b of the electric wire 103. According to the lightning arrester 100 according to the first embodiment of the present invention, the fastening screw 203 is simply screwed into the terminal member 201 such that the fastening screw 203 penetrates the coating 103b of the electric wire 103 through the insulating member 202. In addition to fixing the electric wire 103 to the terminal member 201, the position of the insulating member 202 relative to the terminal member 201 and the electric wire 103 can be fixed. Accordingly, it is possible to easily and reliably ensure electrical connection with the high-voltage pull-down insulated electric wire 103, and to facilitate the installation work of the lightning arrester 100 that can exhibit stable lightning protection performance over a long period of time. Can do.

また、この発明にかかる実施の形態１の避雷器１００は、端子部材２０１の負荷側において当該端子部材２０１を支持し、加えられた外力に応じて変形するとともに当該外力が除去された場合は元の形状に復帰する弾性を示す支持部材２０４としてのスプリングを備えたことを特徴としている。 In addition, the lightning arrester 100 according to the first embodiment of the present invention supports the terminal member 201 on the load side of the terminal member 201, deforms according to the applied external force, and removes the original force when the external force is removed. It is characterized in that a spring is provided as a support member 204 that exhibits elasticity to return to its shape.

この発明にかかる実施の形態１の避雷器１００によれば、電線１０３が振動したり揺動したりすることに起因して端子部材２０１に外力がかかった場合は負荷側を支点として端子部材２０１を揺動させることができる。これによって、電線１０３が振動したり揺動したりすることに起因して電線１０３にかかる外力を分散し低減することができ、芯線１０３ａの疲労断線を抑制することができる。すなわち、この発明にかかる実施の形態１の避雷器１００によれば、電線１０３が振動したり揺動したりすることに起因して電線１０３にかかる外力が一点に集中しないようにすることができ、これによって芯線１０３ａの疲労断線を抑制することができる。 According to the lightning arrester 100 according to the first embodiment of the present invention, when an external force is applied to the terminal member 201 due to the vibration or swinging of the electric wire 103, the terminal member 201 is used with the load side as a fulcrum. It can be swung. Thereby, it is possible to disperse and reduce the external force applied to the electric wire 103 due to the vibration or swinging of the electric wire 103, and to suppress fatigue disconnection of the core wire 103a. That is, according to the lightning arrester 100 according to the first embodiment of the present invention, it is possible to prevent the external force applied to the electric wire 103 from being concentrated on one point due to the electric wire 103 vibrating or swinging. Thereby, the fatigue disconnection of the core wire 103a can be suppressed.

また、この発明にかかる実施の形態１の避雷器１００は、絶縁部材２０２が、電源側の端部において、電源側が突出するように湾曲した形状をなすことを特徴としている。この発明にかかる実施の形態１の避雷器１００によれば、電線１０３が振動したり揺動したりすることに起因して電線１０３が絶縁部材２０２の端部に接触した場合に、絶縁部材２０２との接触部分において電線１０３が急激に屈曲することを抑制することができる。これによって、芯線１０３ａの疲労断線を抑制することができる。 The lightning arrester 100 according to the first embodiment of the present invention is characterized in that the insulating member 202 has a curved shape so that the power supply side protrudes at the end on the power supply side. According to the lightning arrester 100 of the first embodiment of the present invention, when the electric wire 103 comes into contact with the end of the insulating member 202 due to the electric wire 103 vibrating or swinging, the insulating member 202 and It is possible to prevent the electric wire 103 from being bent suddenly at the contact portion. Thereby, the fatigue disconnection of the core wire 103a can be suppressed.

また、この発明にかかる実施の形態１の避雷器１００は、絶縁部材２０２が、少なくとも一端に開口部２０２ａを備え、接続対象とする電線１０３の外径と同等以上の内径の略円筒形状をなすことを特徴としている。この発明にかかる実施の形態１の避雷器１００によれば、絶縁部材２０２の形状を、電線１０３の外径と同等以上の内径の略円筒形状とすることによって、開口部２０２ａを介して電線１０３の先端を絶縁部材２０２に挿入するだけで当該絶縁部材２０２に電線１０３の先端を保持させることができる。これによって、避雷器１００の設置作業の容易化を図ることができる。 In the lightning arrester 100 according to the first embodiment of the present invention, the insulating member 202 has an opening 202a at least at one end, and has a substantially cylindrical shape with an inner diameter equal to or larger than the outer diameter of the electric wire 103 to be connected. It is characterized by. According to the lightning arrester 100 of the first embodiment according to the present invention, the shape of the insulating member 202 is a substantially cylindrical shape having an inner diameter equal to or larger than the outer diameter of the electric wire 103, whereby the electric wire 103 is provided via the opening 202a. By simply inserting the tip into the insulating member 202, the tip of the electric wire 103 can be held by the insulating member 202. Thereby, the installation work of the lightning arrester 100 can be facilitated.

また、この発明にかかる実施の形態１の避雷器１００は、開口部２０２ａが、端子部材２０１における電源側の端部よりも電源側に位置するように設けられ、絶縁部材２０２に対する電線１０３の挿入方向に対して傾斜する方向に開口することを特徴としている。この発明にかかる実施の形態１の避雷器１００によれば、絶縁部材２０２を大型化することなく開口部２０２ａの開口径を電線１０３の外径よりも大きくすることができるので、電線１０３が振動や揺動した際に当該電線１０３が開口部２０２ａの周縁と擦れることを抑制し、芯線１０３ａの疲労断線を抑制することができる。 Further, the lightning arrester 100 according to the first embodiment of the present invention is provided such that the opening 202a is located on the power supply side with respect to the end on the power supply side of the terminal member 201, and the insertion direction of the electric wire 103 with respect to the insulating member 202 It is characterized by opening in a direction that is inclined with respect to. According to the lightning arrester 100 according to the first embodiment of the present invention, the opening diameter of the opening 202a can be made larger than the outer diameter of the electric wire 103 without increasing the size of the insulating member 202. When the wire 103 swings, the electric wire 103 can be prevented from rubbing against the periphery of the opening 202a, and fatigue breakage of the core wire 103a can be suppressed.

また、この発明にかかる実施の形態１の避雷器１００は、端子部材２０１が、少なくとも一端に開口部２０１ａを備えた略円筒形状をなし、絶縁部材２０２が、端子部材２０１の内径と略同一の外径の略円筒形状をなし、当該端子部材２０１の内側に取り外し可能に挿入されることを特徴としている。この発明にかかる実施の形態１の避雷器１００によれば、接続対象とする電線１０３の外径に応じて内径が異なる絶縁部材２０２を用いることができる。 In the lightning arrester 100 according to the first embodiment of the present invention, the terminal member 201 has a substantially cylindrical shape with an opening 201a at least at one end, and the insulating member 202 has an outer diameter substantially the same as the inner diameter of the terminal member 201. It has a substantially cylindrical shape with a diameter, and is detachably inserted inside the terminal member 201. According to the lightning arrester 100 according to the first embodiment of the present invention, it is possible to use the insulating member 202 having a different inner diameter according to the outer diameter of the electric wire 103 to be connected.

特に、絶縁部材２０２の内径を、接続対象とする電線１０３との間の隙間が小さくなるように当該電線１０３の外径と略同一とすることにより、絶縁部材２０２と電線１０３のがたつきを確実に防止することができる。これによって、この発明にかかる実施の形態１の避雷器１００によれば、長期にわたって電線１０３を安定して保持することができる。 In particular, by making the inner diameter of the insulating member 202 substantially the same as the outer diameter of the electric wire 103 so as to reduce the gap between the electric wire 103 to be connected, the rattling of the insulating member 202 and the electric wire 103 is reduced. It can be surely prevented. Thereby, according to the lightning arrester 100 of Embodiment 1 concerning this invention, the electric wire 103 can be hold | maintained stably over a long period of time.

（実施の形態２）
つぎに、この発明にかかる実施の形態２の避雷器の構成について説明する。この発明にかかる実施の形態２においては、上述した実施の形態１と同一部分は同一符号で示し、説明を省略する。 (Embodiment 2)
Next, the structure of the lightning arrester according to the second embodiment of the present invention will be described. In the second embodiment according to the present invention, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

図５は、この発明にかかる実施の形態２の避雷器の構成を示す説明図である。図５において、この発明にかかる実施の形態２の避雷器５００は、スプリングによって実現される支持部材２０４に代えて、複数の部材を用いて構成される支持部材（ステンレスウェハウス）５０１を備えている。支持部材５０１を実現するステンレスウェハウスは、たとえば、径が異なる複数の円筒形状をなす複数の部材５０１ａを同心円状に複数重ね合わせることによって構成される。径が異なる複数の円筒形状をなす複数の部材５０１ａは、それぞれ、端子部材２０１側の端部にフランジが設けられている。径が異なる複数の円筒形状をなす複数の部材５０１ａは、それぞれ、金属材料などを用いて形成することができる。 FIG. 5 is an explanatory diagram showing the configuration of the lightning arrester according to the second embodiment of the present invention. In FIG. 5, a lightning arrester 500 according to the second embodiment of the present invention includes a support member (stainless steel house) 501 configured using a plurality of members instead of the support member 204 realized by a spring. . The stainless steel house that realizes the support member 501 is configured, for example, by overlapping a plurality of cylindrical members 501a having different diameters concentrically. The plurality of members 501a having a plurality of cylindrical shapes having different diameters are each provided with a flange at an end portion on the terminal member 201 side. The plurality of members 501a having a plurality of cylindrical shapes having different diameters can each be formed using a metal material or the like.

これによって、複数の部材５０１ａを用いて構成される支持部材５０１は、外力が加えられた場合に、負荷側を支点として、負荷側よりも電源側が大きく変動するように揺動可能とされる。また、複数の部材５０１ａを用いて構成される支持部材５０１は、加えられた外力が除去された場合に、元の形状に復帰し、電線１０３（電線１０３の芯線１０３ａ）は長さ方向に直線状態とされる。 As a result, when an external force is applied, the support member 501 configured using a plurality of members 501a can swing so that the power source side fluctuates more greatly than the load side with the load side as a fulcrum. Further, the support member 501 configured using a plurality of members 501a returns to its original shape when the applied external force is removed, and the electric wire 103 (the core wire 103a of the electric wire 103) is straight in the length direction. State.

以上説明したように、この発明にかかる実施の形態２の避雷器５００は、端子部材２０１の負荷側において当該端子部材２０１を支持し、加えられた外力に応じて変形するとともに当該外力が除去された場合は元の形状に復帰する弾性を示す支持部材５０１を構成する複数の部材５０１ａを備えたことを特徴としている。 As described above, the lightning arrester 500 according to the second embodiment of the present invention supports the terminal member 201 on the load side of the terminal member 201, is deformed according to the applied external force, and the external force is removed. In this case, a plurality of members 501a constituting the supporting member 501 exhibiting elasticity to return to the original shape are provided.

この発明にかかる実施の形態２の避雷器５００によれば、電線１０３が振動したり揺動したりすることに起因して端子部材２０１に外力がかかった場合は負荷側を支点として端子部材２０１を揺動させることができる。これによって、電線１０３が振動したり揺動したりすることに起因して電線１０３にかかる外力を分散し低減することができ、芯線１０３ａの疲労断線を抑制することができる。 According to the lightning arrester 500 according to the second embodiment of the present invention, when an external force is applied to the terminal member 201 due to the vibration or swinging of the electric wire 103, the terminal member 201 is used with the load side as a fulcrum. It can be swung. Thereby, it is possible to disperse and reduce the external force applied to the electric wire 103 due to the vibration or swinging of the electric wire 103, and to suppress fatigue disconnection of the core wire 103a.

上述した実施の形態１の避雷器１００および実施の形態２の避雷器５００においては、開口部２０２ａを形成する周縁部分を丸めることによって、絶縁部材２０２における電源側の端部を、電源側が突出するように湾曲した形状としたが、絶縁部材２０２における電源側の端部の形状はこれに限るものではない。絶縁部材２０２における電源側の端部の形状は、上記の形状とは別の形状であってもよい（図６を参照）。 In the lightning arrester 100 of the first embodiment and the lightning arrester 500 of the second embodiment, the power supply side end of the insulating member 202 protrudes from the power supply side by rounding the peripheral portion forming the opening 202a. Although the shape is curved, the shape of the end portion on the power source side of the insulating member 202 is not limited to this. The shape of the end on the power source side of the insulating member 202 may be different from the above shape (see FIG. 6).

図６は、絶縁部材２０２の別の形状を示す説明図である。図６において、上述した実施の形態１の避雷器１００および実施の形態２の避雷器５００においては、絶縁部材２０２に代えて、絶縁部材６００を備えていてもよい。図６に示した絶縁部材６００は、当該絶縁部材６００の軸心方向に対して開口部６００ａ側ほど離間するように外周側に向かって拡開した形状をなす。これによって、絶縁部材６００における開口部６００ａ側の一端部分すなわち電源側の端部を、電源側が突出するように湾曲させることができる。 FIG. 6 is an explanatory view showing another shape of the insulating member 202. In FIG. 6, the lightning arrester 100 of the first embodiment and the lightning arrester 500 of the second embodiment described above may include an insulating member 600 instead of the insulating member 202. The insulating member 600 shown in FIG. 6 has a shape that expands toward the outer peripheral side so as to be separated toward the opening 600 a side with respect to the axial center direction of the insulating member 600. Accordingly, one end portion of the insulating member 600 on the opening 600a side, that is, the end portion on the power source side can be curved so that the power source side protrudes.

これによって、上述した実施の形態１の避雷器１００および実施の形態２の避雷器５００において説明した絶縁部材２０２に代えて図６に示した絶縁部材６００を設けた避雷器においても、電線１０３が振動したり揺動したりすることに起因して電線１０３が絶縁部材６００の端部に接触した場合に、絶縁部材６００との接触部分において電線１０３が急激に屈曲することを抑制することができる。これによって、芯線１０３ａの疲労断線を抑制することができる。 Accordingly, the electric wire 103 vibrates even in the lightning arrester provided with the insulating member 600 shown in FIG. 6 instead of the insulating member 202 described in the lightning arrester 100 of the first embodiment and the lightning arrester 500 of the second embodiment. When the electric wire 103 comes into contact with the end portion of the insulating member 600 due to swinging or the like, it is possible to suppress the electric wire 103 from being bent suddenly at a contact portion with the insulating member 600. Thereby, the fatigue disconnection of the core wire 103a can be suppressed.

以上のように、この発明にかかる避雷器は、電柱などに設置される避雷器に有用であり、特に、風雨などの外的要因に起因する振動が著しい電線に接続される避雷器に適している。 As described above, the lightning arrester according to the present invention is useful for a lightning arrester installed on a power pole or the like, and is particularly suitable for a lightning arrester connected to an electric wire that is significantly vibrated due to external factors such as wind and rain.

１００避雷器
１０１避雷器本体
１０２ゴムブッシュ
２０１端子部材
２０２絶縁部材
２０３締め付けネジ
２０４支持部材
５００避雷器
５０１支持部材
６００絶縁部材 DESCRIPTION OF SYMBOLS 100 Arrester 101 Arrester body 102 Rubber bushing 201 Terminal member 202 Insulating member 203 Clamping screw 204 Support member 500 Arrester 501 Support member 600 Insulating member

Claims

A lightning arrester body that houses a cylindrical fuse with a pair of terminals;
A terminal member provided in the lightning arrester body, formed using a conductive material, and electrically connected to one terminal provided on the power source side of the pair of terminals;
An insulating member that is provided in the lightning arrester body, is formed of an insulating material, and holds the tip portion of the electric wire provided with a coating in a state in which insulation between the electric wire and the terminal member is secured;
A tightening screw that is formed using a conductive material and is screwed into the terminal member so as to penetrate the coating of the wire held by the insulating member, and electrically connects the terminal member and the core of the wire;
A lightning arrester characterized by comprising.

2. The lightning arrester according to claim 1, wherein the tightening screw is screwed to the terminal member so as to penetrate the coating of the electric wire through the insulating member.

The terminal member is supported on the load side of the terminal member, and is provided with a support member that is deformed in accordance with an applied external force and exhibits elasticity that returns to its original shape when the external force is removed. The lightning arrester according to claim 1 or 2.

The lightning arrester according to any one of claims 1 to 3, wherein the insulating member has a curved shape so that the power source side protrudes at an end portion on the power source side.

5. The insulating member according to claim 1, wherein the insulating member includes an opening at least at one end and has a substantially cylindrical shape having an inner diameter equal to or greater than an outer diameter of an electric wire to be connected. Arrestor.

The said opening part is provided so that it may be located in the power supply side rather than the edge part by the side of the power supply in the said terminal member, It opens in the direction inclined with respect to the insertion direction of the said electric wire with respect to the said insulating member. Item 6. A lightning arrester according to item 5.

The terminal member has a substantially cylindrical shape with an opening at at least one end,
The lightning arrester according to claim 5 or 6, wherein the insulating member has a substantially cylindrical shape having an outer diameter substantially the same as an inner diameter of the terminal member, and is removably inserted inside the terminal member.