JP7366412B2

JP7366412B2 - Insulated conductor connection

Info

Publication number: JP7366412B2
Application number: JP2020010556A
Authority: JP
Inventors: 雅彦柿澤
Original assignee: Furukawa Electric Power Systems Co Ltd
Current assignee: Furukawa Electric Power Systems Co Ltd
Priority date: 2020-01-27
Filing date: 2020-01-27
Publication date: 2023-10-23
Anticipated expiration: 2040-01-27
Also published as: JP2021118617A

Description

本発明は、絶縁被覆導体接続体に関する。より具体的には、鉄道分野などの電灯線、電力線などの導電線を終端、延長または分岐するのに好適な絶縁被覆導体接続体に関する。 The present invention relates to an insulated conductor connection body. More specifically, the present invention relates to an insulated conductor connector suitable for terminating, extending, or branching conductive lines such as electric light lines and power lines in the railway field.

従来から、鉄道の駅舎や踏切、信号機などに電力を供給するため、線路に沿わせて電灯線や電力線などの導電線が敷設されている。ここで、導電線を構成する電力ケーブルは、駅舎などに電力を供給するために分岐させる必要があり、また、駅間などでは２本の電力ケーブルを電気的に接続して延長させる必要がある。このような電力ケーブルの分岐や延長には接続箱が用いられる場合が多く、電力ケーブルの分岐や延長のために電力ケーブルが電気的に接続している部分は、接続箱などの筐体内に収められていることが多い。 BACKGROUND OF THE INVENTION Conventionally, conductive wires such as electric light lines and power lines have been laid along railroad tracks to supply electricity to railway station buildings, railroad crossings, traffic lights, etc. Here, the power cables that make up the conductive line need to be branched to supply power to station buildings, etc., and it is also necessary to electrically connect and extend two power cables between stations. . Junction boxes are often used for branching and extending power cables, and the parts to which the power cables are electrically connected for branching and extending power cables are housed inside a housing such as a junction box. It is often

接続箱の内部では、例えば図４に示すように、導電線の３相のそれぞれについて、複数の電力ケーブルが接続されていた。これらの３相のうち、左側に示される相では、接続の対象となる電力ケーブル９１ａ、９２ａにそれぞれ端子９３ａ、９４ａを設け、これらの端子９３ａ、９４ａを、ブスバーなどの通電部９５ａにボルトで固定することで接続されていた。また、３相のうち、中央および右側にそれぞれ位置する２つの相についても、左側の相と同様に接続されていた。これらの電力ケーブル９１ａ～９１ｃおよび９２ａ～９２ｃの端部を構成する導体接続体として、電力ケーブル９１ａ～９１ｃおよび９２ａ～９２ｃのうち、端子９３ａ～９３ｃおよび９４ａ～９４ｃの近傍において電力ケーブルが剥ぎ出される箇所に、シリコーンゴムからなる端末部材９６ａ～９６ｃおよび９７ａ～９７ｃが設けられていた。 Inside the junction box, for example, as shown in FIG. 4, a plurality of power cables were connected to each of the three phases of the conductive wire. Of these three phases, in the phase shown on the left, power cables 91a and 92a to be connected are provided with terminals 93a and 94a, respectively, and these terminals 93a and 94a are connected to a current-carrying part 95a such as a bus bar with bolts. It was connected by fixing it. Furthermore, among the three phases, the two phases located at the center and the right side were also connected in the same way as the left phase. Among the power cables 91a to 91c and 92a to 92c, the power cables are exposed near the terminals 93a to 93c and 94a to 94c as conductor connections forming the ends of these power cables 91a to 91c and 92a to 92c. Terminal members 96a to 96c and 97a to 97c made of silicone rubber were provided at the locations where the terminals were connected.

他方で、電力ケーブルの端部を構成する導体接続体として、例えば特許文献１には、屋外に設置される高圧配電線の導体接続体として、電力ケーブルの端部を差し込む絶縁層がエチレンプロピレンゴム（ＥＰゴム）またはシリコーンゴムの単一ゴムによって構成される導体接続体が記載されている。 On the other hand, as a conductor connector constituting the end of a power cable, for example, Patent Document 1 discloses that an insulating layer into which the end of the power cable is inserted is made of ethylene propylene rubber as a conductor connector for a high-voltage distribution line installed outdoors. Conductor connections constructed from a single rubber (EP rubber) or silicone rubber are described.

特開２００８－２２０００９号公報Japanese Patent Application Publication No. 2008-220009

しかし、このような導電線の接続部を収容する接続箱などの（外側）筐体の内部では、結露が発生し、また、高湿度の内部環境によって導体接続体の表面が水分を持つことによって、導体接続体の表面に塵や埃が付着し、これらの汚損物を辿って電気が流れることで、導体接続体やそれに隣接する電力ケーブルの表面でトラッキング現象が発生する恐れがある。 However, condensation occurs inside the (outer) casing such as a junction box that houses the connections of such conductive wires, and moisture builds up on the surface of conductor connections due to the high humidity internal environment. When dirt and dust adhere to the surface of the conductor connection body and electricity flows following these contaminants, there is a possibility that a tracking phenomenon may occur on the surface of the conductor connection body or the power cable adjacent thereto.

このうち、特許文献１に記載されている導体接続体は、屋外での使用を前提としたものであり、降雨によって塵埃が洗い流されることで、塵埃の堆積によるトラッキング現象の発生を抑えるものである。このため、導体接続体は、塵埃が内部に入り、湿気によって埃が吸着して堆積しやすく、しかも、降雨などによっては堆積した塵埃が洗い流されにくい（外側）筐体の内部のような屋内での使用を前提とした場合であっても、トラッキング現象や地絡などによる電気的事故が起こり難い導体接続体が求められていた。なお、「トラッキング現象」とは、電極間に塵埃や水分（湿気）などが溜まることで微小電流が流れ、それにより炭化導電路（トラック）ができて電極間がショート（発火）する現象をいう。また、「地絡」とは、各部材（導体接続体など）や高圧ケーブル、筐体における絶縁不良によって、本来の電気供給先（目的の場所）ではない抵抗値の低いアース（大地・地面）に電気が流れ出る現象をいう。 Among these, the conductor connector described in Patent Document 1 is intended for outdoor use, and the dust is washed away by rain, thereby suppressing the occurrence of tracking phenomenon due to dust accumulation. . For this reason, conductor connectors are used indoors, such as inside the (outer) case, where dust can easily get inside, where dust can be attracted and accumulated due to humidity, and where it is difficult for the accumulated dust to be washed away by rain or other factors. There is a need for conductor connections that are less likely to cause electrical accidents due to tracking phenomena or ground faults, even when used as a premise. The "tracking phenomenon" refers to a phenomenon in which a minute current flows when dust or water (humidity) accumulates between electrodes, creating a carbonized conductive path (track) and causing a short circuit (ignition) between the electrodes. . In addition, "ground fault" refers to a low-resistance ground (earth/ground) that is not the intended electricity supply destination (destination location) due to poor insulation in various parts (conductor connections, etc.), high-voltage cables, or the housing. A phenomenon in which electricity flows out.

また、図４に記載される端末部材は、主に接続箱などの（外側）筐体内に収められるものであるが、端子９３ａ～９３ｃおよび９４ａ～９４ｃに直接接続されるものであるため、導電線の施工や点検の際に、何らかの手違いで電力ケーブル９１ａ～９１ｃおよび９２ａ～９２ｃが通電している場合や、電力ケーブル９１ａ～９１ｃおよび９２ａ～９２ｃの接地が不十分であった場合に、端子９３ａ～９３ｃおよび９４ａ～９４ｃを介して作業者が感電する恐れがあった。 Furthermore, the terminal members shown in FIG. 4 are mainly housed in an (outer) housing such as a junction box, but because they are directly connected to the terminals 93a to 93c and 94a to 94c, they are electrically conductive. When installing or inspecting the wires, if the power cables 91a to 91c and 92a to 92c are energized due to some mistake, or if the power cables 91a to 91c and 92a to 92c are insufficiently grounded, the terminal There was a risk that the worker would receive an electric shock through the terminals 93a to 93c and 94a to 94c.

ここで、特に作業者が感電する恐れを低減させる観点から、（外側）筐体内に収められている端子９３ａ～９３ｃおよび９４ａ～９４ｃの周囲を囲むように、閉鎖空間を形成する内側筐体を（外側）筐体内に設け（図示せず）、それにより筐体を二重構造にすることについて、本発明者は検討を進めた。この内側筐体によって形成される閉鎖空間は、内側筐体から端末部材（導体接続体）や電力ケーブルが延出するため密閉されるものではないが、内側筐体の内部に収容した通電部や端子と、外側筐体の作業空間とを隔てることができれば、作業者が通電部や端子に接触することで感電する恐れを低減することができる。しかし、このような二重構造の筐体に好適に用いることができる導体接続体は知られていないため、このような二重構造の筐体に用いたときに、トラッキング現象などによる電気的事故が起こり難い導体接続体が求められていた。 Here, from the viewpoint of reducing the risk of electric shock to workers, an inner casing that forms a closed space is designed to surround the terminals 93a to 93c and 94a to 94c housed in the (outer) casing. The present inventor has proceeded with the study of providing the inside of the (outer) housing (not shown), thereby making the housing a double structure. The closed space formed by this inner casing is not sealed because terminal members (conductor connectors) and power cables extend from the inner casing, but the closed space is not sealed because the terminal members (conductor connections) and power cables extend from the inner casing. If the terminal can be separated from the work space of the outer casing, it is possible to reduce the risk of an electric shock caused by a worker coming into contact with the current-carrying part or the terminal. However, there is no known conductor connector that can be suitably used in such a double-structured case, so when used in such a double-structured case, there is a risk of electrical accidents due to tracking phenomena, etc. There was a need for a conductor connection body that would hardly cause this.

本発明の目的は、筐体内の非密閉の閉鎖空間に用いられ、塵埃が堆積したときに降雨などによって洗浄されない場合であっても、通電部や端子への接触による感電の危険性が少なく、かつトラッキング現象や地絡などの電気的事故が起こり難い導体接続体を提供することである。 It is an object of the present invention to be used in an unsealed closed space within a housing, and even if dust accumulates and is not washed away by rain or the like, there is little risk of electric shock due to contact with current-carrying parts or terminals. Moreover, it is an object of the present invention to provide a conductor connection body in which electrical accidents such as tracking phenomena and ground faults are unlikely to occur.

本発明者らは、導体接続体のうち、中心導体の周りを被覆する電気絶縁部材について、エチレンプロピレンゴムからなる第１絶縁部材と、シリコーンゴムからなる第２絶縁部材とによって構成することで、筐体内の非密閉の閉鎖空間に用いられる場合であっても、必要な絶縁性能が得られるとともに、トラッキング現象などによる電気的事故が起こり難くなることを見出し、かかる知見に基づき本発明を完成させるに至った。 The present inventors have proposed that the electrical insulating member that covers the center conductor of the conductor connection body is composed of a first insulating member made of ethylene propylene rubber and a second insulating member made of silicone rubber. It was discovered that even when used in an unsealed closed space inside a housing, the necessary insulation performance can be obtained and electrical accidents due to tracking phenomena are less likely to occur, and based on this knowledge, the present invention was completed. reached.

すなわち、本発明の要旨構成は、以下のとおりである。
（１）棒状の中心導体と、前記中心導体の周りを被覆する電気絶縁部材とを有する絶縁被覆導体接続体であって、前記中心導体に通電する通電部、および前記通電部に接続され、前記中心導体の他端に形成される他端接続部を、少なくとも内側筐体の非密閉の閉鎖空間に収容し、かつ、前記内側筐体を外側筐体に収容するとともに、前記中心導体の一端に形成される一端接続部を、前記内側筐体から外側に突出させて、前記外側筐体の作業空間に配置する絶縁被覆導体接続体において、前記電気絶縁部材が、エチレンプロピレンゴムからなり、筒状の第１内周面を有する第１絶縁部材と、シリコーンゴムからなり、筒状の第２内周面を有する第２絶縁部材とによって構成される、絶縁被覆導体接続体。
（２）前記第１絶縁部材は、前記第１内周面が、前記中心導体の一端側部分の外周面に密着した状態で配置され、前記第２絶縁部材は、前記第２内周面が、前記中心導体の他端側部分の外周面に密着した状態で配置され、かつ、一端側部分に、前記中心導体の外周面から分離する延設部を設け、前記第１絶縁部材の他端側の外周面と、前記第２絶縁部材の前記延設部の内周面とが、密着した状態で連結される、上記（１）に記載の絶縁被覆導体接続体。
（３）前記第１絶縁部材の他端部の外周面と、前記第２絶縁部材の前記延設部の内周面との連結は、前記第１絶縁部材の他端部の外周面に、他端に向かって縮径するように形成した第１テーパー面と、前記第２絶縁部材の前記延設部の内周面に、一端に向かって拡径するように形成した第２テーパー面との緊密嵌合によるものである、上記（２）に記載の絶縁被覆導体接続体。
（４）前記第１絶縁部材の外周面と前記第２絶縁部材の延設部とが連結される部分に介挿されて、前記第２絶縁部材で被覆されていない前記第１絶縁部材の外周面を被覆するように配設される外部半導電層をさらに有し、前記外部半導電層は、介挿される部分の、前記第１絶縁部材の外周面に対向する内周面の少なくとも一部の形状が、曲面状である、上記（１）～（３）のいずれか１項に記載の絶縁被覆導体接続体。
（５）前記絶縁被覆導体接続体は、一端側部分に、プラグ形状またはレセプタクル形状をした嵌合接続部を有し、他端側部分に、通電部の導体が一部露出する導体部分に接続される端子を有する、上記（１）～（４）のいずれか１項に記載の絶縁被覆導体接続体。
（６）通電部に接続される前記絶縁被覆導体接続体部や分岐線の数に応じて、電力ケーブル幹線の終端、延長または分岐に用いられる、上記（１）～（５）のいずれか１項に記載の絶縁被覆導体接続体。
（７）前記第１絶縁部材に埋設され、前記中心導体を流れる電流を検知する検電端子部をさらに有する、上記（１）～（６）のいずれか１項に記載の絶縁被覆導体接続体。 That is, the gist of the present invention is as follows.
(1) An insulated conductor connection body having a rod-shaped center conductor and an electrically insulating member covering the center conductor, which includes a current-carrying part that supplies current to the center conductor; The other end connecting portion formed at the other end of the center conductor is housed in at least an unsealed closed space of the inner casing, and the inner casing is housed in the outer casing, and the other end connecting portion formed at the other end of the center conductor is In the insulated conductor connection body, the electrically insulating member is made of ethylene propylene rubber and has a cylindrical shape. An insulated conductor connection body comprising: a first insulating member having a first inner circumferential surface; and a second insulating member made of silicone rubber and having a cylindrical second inner circumferential surface.
(2) The first insulating member is arranged such that the first inner circumferential surface is in close contact with the outer circumferential surface of the one end side portion of the center conductor, and the second insulating member is arranged such that the second inner circumferential surface is in close contact with the outer circumferential surface of the one end side portion of the center conductor. , the other end of the first insulating member is arranged in close contact with the outer circumferential surface of the other end side portion of the center conductor, and is provided with an extending portion separated from the outer circumferential surface of the center conductor at one end side portion; The insulated conductor connection body according to (1) above, wherein the outer circumferential surface of the side and the inner circumferential surface of the extension part of the second insulating member are connected in close contact with each other.
(3) The connection between the outer circumferential surface of the other end of the first insulating member and the inner circumferential surface of the extension part of the second insulating member is made by connecting the outer circumferential surface of the other end of the first insulating member to the inner circumferential surface of the extension portion of the second insulating member. a first tapered surface formed to decrease in diameter toward the other end; and a second tapered surface formed on the inner circumferential surface of the extended portion of the second insulating member to increase in diameter toward one end. The insulated conductor connection body according to (2) above, which is formed by tight fitting.
(4) An outer periphery of the first insulating member that is inserted into a portion where the outer peripheral surface of the first insulating member and the extension portion of the second insulating member are connected and is not covered with the second insulating member. The outer semiconducting layer further includes an outer semiconducting layer disposed so as to cover a surface of the first insulating member, and the outer semiconducting layer covers at least a portion of the inner circumferential surface of the inserted portion that faces the outer circumferential surface of the first insulating member. The insulated conductor connection body according to any one of (1) to (3) above, wherein the shape is a curved surface.
(5) The insulated conductor connector has a plug-shaped or receptacle-shaped fitting connection part at one end, and is connected to a conductor part where the conductor of the current-carrying part is partially exposed at the other end. The insulated conductor connection body according to any one of (1) to (4) above, which has a terminal.
(6) Any one of the above (1) to (5) used for terminating, extending, or branching a power cable main line, depending on the number of insulated conductor connectors and branch lines connected to the current-carrying part. The insulated conductor connection body described in .
(7) The insulated conductor connection body according to any one of (1) to (6) above, further comprising a voltage detection terminal section that is embedded in the first insulating member and detects the current flowing through the center conductor. .

本発明によれば、筐体内の非密閉の閉鎖空間に用いられ、塵埃が堆積したときに降雨などによって洗浄されない場合であっても、通電部や端子への接触による感電の危険性が少なく、かつトラッキング現象や地絡などの電気的事故が起こり難い導体接続体を提供することができる。 According to the present invention, even if the present invention is used in an unsealed closed space within a housing and is not cleaned by rain or the like when dust accumulates, there is little risk of electric shock due to contact with current-carrying parts or terminals. Moreover, it is possible to provide a conductor connection body in which electrical accidents such as tracking phenomena and ground faults are less likely to occur.

本発明の実施形態に係る絶縁被覆導体接続体の構成の一例を示すものであって、（ａ）が正面図、（ｂ）が断面図である。1 shows an example of the configuration of an insulated conductor connector according to an embodiment of the present invention, in which (a) is a front view and (b) is a cross-sectional view. 本発明の実施形態に係る絶縁被覆導体接続体について、第１絶縁部材と第２絶縁部材を組み立てる前の状態を示す図である。It is a figure showing the state before assembling a 1st insulating member and a 2nd insulating member about an insulated conductor connection object concerning an embodiment of the present invention. 本発明の実施形態に係る絶縁被覆導体接続体を用いて、電力ケーブルを接続させたときの状態を示す図である。FIG. 2 is a diagram showing a state in which a power cable is connected using the insulated conductor connector according to the embodiment of the present invention. 従来技術に係る導体接続体の構成の一例を示した斜視図である。FIG. 2 is a perspective view showing an example of the configuration of a conductor connection body according to the prior art.

以下、本発明の具体的な実施形態について、図面を参照しながら詳細に説明する。なお、本発明は、以下の実施形態に限定されるものではなく、本発明の要旨を変更しない範囲で種々の変更が可能である。 Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiments, and various changes can be made without changing the gist of the present invention.

＜絶縁被覆導体接続体＞
本実施形態の絶縁被覆導体接続体は、棒状の中心導体と、前記中心導体の周りを被覆する電気絶縁部材とを有する絶縁被覆導体接続体であって、前記中心導体に通電する通電部、および前記通電部に接続され、前記中心導体の他端に形成される他端接続部を、少なくとも内側筐体の非密閉の閉鎖空間に収容し、かつ、前記内側筐体を外側筐体に収容するとともに、前記中心導体の一端に形成される一端接続部を、前記内側筐体から外側に突出させて、前記外側筐体の作業空間に配置する絶縁被覆導体接続体において、前記電気絶縁部材が、エチレンプロピレンゴムからなり、筒状の第１内周面を有する第１絶縁部材と、シリコーンゴムからなり、筒状の第２内周面を有する第２絶縁部材とによって構成される。 <Insulated conductor connection body>
The insulated conductor connection body of the present embodiment is an insulated conductor connection body that has a rod-shaped center conductor and an electrically insulating member that covers the center conductor, and includes a current-carrying part that conducts electricity to the center conductor; The other end connecting portion connected to the current-carrying portion and formed at the other end of the center conductor is accommodated in at least an unsealed closed space of an inner casing, and the inner casing is accommodated in an outer casing. In addition, in the insulating coated conductor connection body in which one end connection portion formed at one end of the center conductor projects outward from the inner casing and is disposed in the work space of the outer casing, the electrically insulating member includes: The first insulating member is made of ethylene propylene rubber and has a cylindrical first inner circumferential surface, and the second insulating member is made of silicone rubber and has a cylindrical second inner circumferential surface.

本実施形態に係る絶縁被覆導体接続体では、中心導体の周りを被覆する電気絶縁部材について、エチレンプロピレンゴムからなる第１絶縁部材と、シリコーンゴムからなる第２絶縁部材とによって構成することで、優れた絶縁性を有するエチレンプロピレンゴムと、高い撥水性を有し塵埃が付着し難いシリコーンゴムの双方の長所が生かされるため、絶縁被覆導体接続体におけるトラッキング現象や地絡を起こり難くすることができる。それとともに、内側筐体の非密閉の閉鎖空間に、中心導体に通電する通電部と、この通電部に他端接続部で接続する絶縁被覆導体接続体とを収容し、かつ、内側筐体を外側筐体に収容し、絶縁被覆導体接続体の一端接続部を内側筐体から外側に突出させて外側筐体の作業空間に配置するように構成することで、導電線の施工や点検の際に、作業者が通電部や端子に接触して感電する可能性を低減することができる。したがって、筐体内の非密閉の閉鎖空間に用いられ、塵埃が堆積したときに降雨などによって洗浄されない場合であっても、通電部や端子への接触による感電の危険を低減しながら、トラッキング現象や地絡などの電気的事故を起こり難くすることができる。 In the insulating coated conductor connection body according to the present embodiment, the electrical insulating member covering the center conductor is composed of a first insulating member made of ethylene propylene rubber and a second insulating member made of silicone rubber. Since it takes advantage of the advantages of both ethylene propylene rubber, which has excellent insulating properties, and silicone rubber, which has high water repellency and is difficult to attract dust, it makes it difficult for tracking phenomena and ground faults to occur in insulated conductor connections. can. At the same time, a current-carrying part that supplies current to the center conductor and an insulated conductor connection body that connects to the current-carrying part at the other end connection part are housed in the non-sealed closed space of the inner casing, and the inner casing is The insulated conductor connection body is housed in the outer casing, and one end of the insulated conductor connector protrudes outward from the inner casing and is placed in the work space of the outer casing, making it easy to install and inspect conductive wires. In addition, the possibility of an electric shock caused by a worker coming into contact with a current-carrying part or terminal can be reduced. Therefore, even if the device is used in an unsealed closed space inside the housing and dust accumulates and is not washed away by rain, etc., it will reduce the risk of electric shock due to contact with current-carrying parts or terminals, and prevent tracking phenomena. Electrical accidents such as ground faults can be made less likely to occur.

以下、本発明の絶縁被覆導体接続体の実施形態について、詳細に説明する。 Hereinafter, embodiments of the insulated conductor connector of the present invention will be described in detail.

＜絶縁被覆導体接続体についての実施形態＞
図１は、本実施形態に係る絶縁被覆導体接続体１の構成の一例を示す図であって、（ａ）が正面図、（ｂ）が縦断面図である。本実施形態に係る絶縁被覆導体接続体１は、棒状の中心導体６と、中心導体６の周りを被覆する電気絶縁部材２とを有するとともに、電気絶縁部材２が第１絶縁部材３と第２絶縁部材４とによって構成される。 <Embodiment regarding insulated conductor connection body>
FIG. 1 is a diagram showing an example of the configuration of an insulated conductor connector 1 according to the present embodiment, in which (a) is a front view and (b) is a longitudinal cross-sectional view. The insulated conductor connection body 1 according to the present embodiment includes a rod-shaped center conductor 6 and an electrically insulating member 2 that covers the center conductor 6. The electrically insulating member 2 has a first insulating member 3 and a second It is constituted by an insulating member 4.

（中心導体）
中心導体６は、絶縁被覆導体接続体１の中心に設けられる棒状の導体であって、絶縁被覆導体接続体１の一端Ｔ１側に分離可能に連結される、例えば電気ケーブルのような接続対象物（図示せず）と、他端Ｔ２の側に装着した端子を介して連結される、例えばブスバーなどの通電部のような接続対象物（図示せず）とを電気接続するための導電部材である。 (center conductor)
The center conductor 6 is a rod-shaped conductor provided at the center of the insulated conductor connection body 1, and is separably connected to one end T1 side of the insulated conductor connection body 1, and is connected to an object to be connected, such as an electric cable, for example. (not shown) and a connection target (not shown), such as a current-carrying part such as a bus bar, which is connected via a terminal attached to the other end T2 side. be.

中心導体６の材質は、絶縁被覆導体接続体１において必要とされる通電容量や、絶縁被覆導体接続体１で発生しうる熱量に応じて決定され、優れた導電率を得るとともに発生する熱量を抑える観点では、銅またはアルミニウムからなることが好ましい。 The material of the center conductor 6 is determined according to the current carrying capacity required in the insulated conductor connection body 1 and the amount of heat that can be generated in the insulated conductor connection body 1, and is designed to obtain excellent electrical conductivity and reduce the amount of heat generated. From the viewpoint of suppressing the thickness, it is preferable that the material is made of copper or aluminum.

中心導体６の一端Ｔ１の側には、嵌合接続部６１を介して電力ケーブルが電気的に接続され、中心導体６の他端Ｔ２の側には、端子７が電気的に接続される。これにより、端子７に触れなくても、嵌合接続部６１から電力ケーブルを着脱することが可能になるため、絶縁被覆導体接続体１の他端Ｔ２の側に位置する通電部を直接手で触れる機会を減らし、感電を起こり難くすることができる。 A power cable is electrically connected to one end T1 side of the center conductor 6 via a fitting connection portion 61, and a terminal 7 is electrically connected to the other end T2 side of the center conductor 6. This makes it possible to connect and disconnect the power cable from the fitting connection part 61 without touching the terminal 7, so you can directly touch the current-carrying part located on the other end T2 side of the insulated conductor connection body 1 by hand. It can reduce the chances of contact and make electric shock less likely.

（電気絶縁部材）
電気絶縁部材２は、中心導体６の周りを被覆する部材であり、エチレンプロピレンゴム（ＥＰゴム）からなり、筒状の第１内周面３１を有する第１絶縁部材３と、シリコーンゴムからなり、筒状の第２内周面４１を有する第２絶縁部材４とによって構成される。ここで、エチレンプロピレンゴムは、優れた絶縁性を有しているものの、結露が発生し、また、高湿度の内部環境によって表面が水分を持つことによって、表面に塵や埃が付着し、経年使用によって表面に付着した塵や埃が堆積する性質を有する。そのため、エチレンプロピレンゴムは、導体接続体が降雨などによって洗浄されない、筐体内の非密閉の閉鎖空間での使用には不向きである。一方、シリコーンゴムは、経年使用によっても高湿度や結露環境での浮遊物によって汚損されにくいことから、トラッキング現象を起こし難い性質を有する。しかし、電気絶縁部材２の全体をシリコーンゴムで構成し、これをエチレンプロピレンゴムからなることが多い嵌合接続部８６、８６’と接触させた場合、特にシリコーンゴムとエチレンプロピレンゴムの接触面において、所望の絶縁性を維持できるか否かは不明であった。これに関し、本発明では、電気絶縁部材２の構成部材として、エチレンプロピレンゴムからなる第１絶縁部材と、シリコーンゴムからなる第２絶縁部材とを組み合わせること、より好ましくは、塵や埃の堆積が生じる電気絶縁部材２の少なくとも外周を、塵や埃によって汚損しにくいシリコーンゴムで構成するとともに、電気絶縁部材２のうち中心導体６の外周面に隣接する部分を、優れた絶縁性を有するエチレンプロピレンゴムで構成することによって、所望の絶縁性能を得られるともに、より一層、経年使用によってもトラッキング現象などによる電気的事故を起こり難くすることを可能とした。 (Electrical insulation material)
The electrical insulating member 2 is a member that covers the center conductor 6, and is made of ethylene propylene rubber (EP rubber), and is made of a first insulating member 3 having a cylindrical first inner circumferential surface 31, and silicone rubber. , and a second insulating member 4 having a cylindrical second inner peripheral surface 41. Although ethylene propylene rubber has excellent insulating properties, condensation occurs and the surface retains moisture due to the high humidity internal environment, which causes dust and dust to adhere to the surface and cause it to deteriorate over time. It has the property of accumulating dust and dirt that adheres to the surface through use. Therefore, ethylene propylene rubber is not suitable for use in an unsealed closed space inside a housing where the conductor connectors are not washed by rain or the like. On the other hand, silicone rubber has the property of being less likely to cause the tracking phenomenon because it is less likely to be soiled by floating matter in environments with high humidity or condensation even after years of use. However, when the electrical insulating member 2 is made entirely of silicone rubber and brought into contact with the fitting connection parts 86 and 86', which are often made of ethylene propylene rubber, especially at the contact surface between the silicone rubber and the ethylene propylene rubber, However, it was unclear whether the desired insulation properties could be maintained. In this regard, the present invention preferably combines a first insulating member made of ethylene propylene rubber and a second insulating member made of silicone rubber as constituent members of the electrical insulating member 2, and more preferably, the electrical insulating member 2 is made of a first insulating member made of ethylene propylene rubber and a second insulating member made of silicone rubber. At least the outer periphery of the resulting electrically insulating member 2 is made of silicone rubber that is not easily contaminated by dirt and dust, and the portion of the electrically insulating member 2 adjacent to the outer periphery of the center conductor 6 is made of ethylene propylene, which has excellent insulating properties. By constructing it with rubber, it is possible to obtain the desired insulation performance, and it is also possible to make it even more difficult to cause electrical accidents due to tracking phenomena even after long-term use.

電気絶縁部材２の第１絶縁部材３の第１内周面３１は、中心導体６の一端Ｔ１側の部分（一端部）の外周面に密着した状態で配置されるとともに、第２絶縁部材４の第２内周面４１は、中心導体の他端Ｔ２側の部分の外周面に密着した状態で配置されることが好ましい。これにより、電気絶縁部材２の一端Ｔ１側の部分に、優れた絶縁性を有するエチレンプロピレンゴムからなる第１絶縁部材３が配されるため、一端Ｔ１側で電力ケーブルを繋ぎ、または切り離す際に、作業者が感電する可能性をより低減することができる。また、電気絶縁部材２の他端Ｔ２側の部分に、塵や埃によって汚損しにくいシリコーンゴムからなる第２絶縁部材４が配されるため、絶縁被覆導体接続体１におけるトラッキング現象を起こり難くすることができる。 The first inner circumferential surface 31 of the first insulating member 3 of the electrically insulating member 2 is arranged in close contact with the outer circumferential surface of the portion (one end) on the one end T1 side of the central conductor 6, and the second insulating member 4 It is preferable that the second inner circumferential surface 41 is disposed in close contact with the outer circumferential surface of the portion of the center conductor on the other end T2 side. As a result, the first insulating member 3 made of ethylene propylene rubber having excellent insulating properties is disposed on the part of the electrical insulating member 2 on the T1 side, so that when connecting or disconnecting the power cable at the one end T1 side, , it is possible to further reduce the possibility that workers will receive an electric shock. In addition, since the second insulating member 4 made of silicone rubber, which is not easily contaminated by dirt and dust, is disposed on the other end T2 side of the electrically insulating member 2, the tracking phenomenon in the insulated conductor connector 1 is less likely to occur. be able to.

このとき、第２絶縁部材の一端Ｔ１側の部分に、中心導体６の外周面から分離する延設部４２を設けるとともに、第１絶縁部材３の他端Ｔ２側の部分（他端部）の外周面３２ａと、第２絶縁部材４の延設部４２の内周面４２ａとが、密着した状態で連結されることが好ましい。これにより、第１絶縁部材３の外周面３２ａと、第２絶縁部材４の内周面４２ａとの間に空隙が形成されなくなるため、第１絶縁部材３と第２絶縁部材４との間での放電現象による第１絶縁部材３や第２絶縁部材４の破壊を防ぐことができ、それにより第１絶縁部材３および第２絶縁部材４の絶縁性能をより安定にすることができる。 At this time, an extending portion 42 is provided at one end T1 side of the second insulating member to separate it from the outer circumferential surface of the center conductor 6, and the other end T2 side (other end portion) of the first insulating member 3 is provided. It is preferable that the outer circumferential surface 32a and the inner circumferential surface 42a of the extension part 42 of the second insulating member 4 are connected in close contact with each other. As a result, no gap is formed between the outer circumferential surface 32a of the first insulating member 3 and the inner circumferential surface 42a of the second insulating member 4. Breakdown of the first insulating member 3 and the second insulating member 4 due to the discharge phenomenon can be prevented, thereby making it possible to make the insulation performance of the first insulating member 3 and the second insulating member 4 more stable.

ここで、第１絶縁部材３の他端部の外周面と、第２絶縁部材４の延設部４２の内周面４２ａとの連結は、第１絶縁部材３の他端部の外周面に、他端Ｔ２に向かって縮径するように形成された、縮径部３２の外周面３２ａによって構成される第１テーパー面と、第２絶縁部材４の延設部４２に、一端Ｔ１に向かって拡径するように形成した第２テーパー面との緊密嵌合によることが好ましい。このように、第１絶縁部材３の縮径部３２の外周面３２ａによって構成される第１テーパー面と、第２絶縁部材４の延設部４２の第２テーパー面とを緊密嵌合させることで、第１絶縁部材３の外周面３２ａと、延設部４２の内周面４２ａとが連結された部分では、径方向Ｘの内側（中心導体６の側）にエチレンプロピレンゴムからなる第１絶縁部材３が配されるとともに、外側にシリコーンゴムからなる第２絶縁部材４が配されるようになる。そのため、絶縁被覆導体接続体１の汚損を防止または低減することができる。また、特に非密閉の閉鎖空間を形成する内側筐体を備えた二重構造の筐体に用いたときに、シリコーンゴムからなる第２絶縁部材４を内側筐体内に露出させることで、トラッキング現象をより起こり難くすることができる。 Here, the connection between the outer circumferential surface of the other end of the first insulating member 3 and the inner circumferential surface 42a of the extension part 42 of the second insulating member 4 is made by connecting the outer circumferential surface of the other end of the first insulating member 3 , a first tapered surface constituted by the outer circumferential surface 32a of the reduced diameter portion 32, which is formed so as to reduce the diameter toward the other end T2, and the extended portion 42 of the second insulating member 4 toward one end T1. Preferably, the second tapered surface is tightly fitted with the second tapered surface formed to expand in diameter. In this way, the first tapered surface constituted by the outer circumferential surface 32a of the reduced diameter portion 32 of the first insulating member 3 and the second tapered surface of the extending portion 42 of the second insulating member 4 are tightly fitted. At the part where the outer circumferential surface 32a of the first insulating member 3 and the inner circumferential surface 42a of the extension part 42 are connected, there is a first insulating member made of ethylene propylene rubber on the inside in the radial direction X (on the side of the central conductor 6). The insulating member 3 is disposed, and a second insulating member 4 made of silicone rubber is disposed on the outside. Therefore, contamination of the insulated conductor connection body 1 can be prevented or reduced. In addition, especially when used in a dual-structured housing having an inner housing forming a non-sealed closed space, the tracking phenomenon can be prevented by exposing the second insulating member 4 made of silicone rubber inside the inner housing. can be made more difficult to occur.

第１絶縁部材３の外周面と、第２絶縁部材４の延設部４２の内周面４２ａとを密着した状態で連結させる手段としては、例えば図２に示すように、第１絶縁部材３を中心導体６の外周面に一体成形するとともに、第１絶縁部材３とは別個に第２絶縁部材４を成形し、第２絶縁部材４の延設部４２の拡径する内周面４２ａの部分を、第１絶縁部材３の縮径部３２の外周面３２ａに嵌合させる手段が挙げられる。 For example, as shown in FIG. 2, the first insulating member 3 is integrally molded on the outer peripheral surface of the center conductor 6, and the second insulating member 4 is molded separately from the first insulating member 3, so that the inner peripheral surface 42a of the extending portion 42 of the second insulating member 4 has a larger diameter. An example of this method is to fit the portion into the outer circumferential surface 32a of the reduced diameter portion 32 of the first insulating member 3.

このとき、第２絶縁部材４の延設部４２の拡径する内周面４２ａの部分のうち、少なくとも一部の内径を、第１絶縁部材３の縮径部３２の嵌合する部分の外径よりも小さく成形して、これらを嵌合させることが好ましい。より具体的には、図２に示すように、延設部４２が拡径している内周面４２ａの部分の先端の内壁に凸部４３を設けるとともに、第１絶縁部材３の縮径部３２のうち凸部４３と嵌合する部分に凹部３３を設け、かつ、凸部４３の内径ｒ１を、第１絶縁部材３の外径ｒ２より小さくなるように成形することで、凸部４３を凹部３３に係止させてもよい。また、第２絶縁部材４の延設部４２の拡径する内周面４２ａの部分の内径を、第１絶縁部材３の縮径部３２の外径よりも全体的に小さくなるように成形することで、第２絶縁部材４を第１絶縁部材３に係止させてもよい。これにより、延設部４２の拡径する部分のうち、内径が縮径部３２の外径より小さい箇所が伸縮して縮径部３２に嵌合するため、接合することが困難な第１絶縁部材３と第２絶縁部材４とを、密着した状態で連結することができる。 At this time, the inner diameter of at least a portion of the portion of the inner circumferential surface 42a of the extending portion 42 of the second insulating member 4 whose diameter is increased is set to the outside of the portion where the reduced diameter portion 32 of the first insulating member 3 fits. It is preferable to mold them to be smaller than the diameter and to fit them together. More specifically, as shown in FIG. 2, a convex portion 43 is provided on the inner wall at the tip of the portion of the inner peripheral surface 42a where the extension portion 42 is expanded in diameter, and a convex portion 43 is provided on the inner wall at the tip of the portion of the inner peripheral surface 42a where the extension portion 42 is expanded in diameter. 32, the convex portion 43 is formed by providing a concave portion 33 in a portion that fits with the convex portion 43, and by forming the convex portion 43 so that its inner diameter r1 is smaller than the outer diameter r2 of the first insulating member 3. It may be locked in the recess 33. Further, the inner diameter of the expanding inner circumferential surface 42a of the extended portion 42 of the second insulating member 4 is formed to be smaller overall than the outer diameter of the reduced diameter portion 32 of the first insulating member 3. In this way, the second insulating member 4 may be locked to the first insulating member 3. As a result, the portion of the extended portion 42 whose inner diameter is smaller than the outer diameter of the reduced diameter portion 32 expands and contracts to fit into the reduced diameter portion 32, which makes it difficult to join the first insulator. The member 3 and the second insulating member 4 can be connected in close contact with each other.

他方で、第１絶縁部材３の外周面と、第２絶縁部材４の延設部４２の内周面４２ａとを密着した状態で連結させる手段として、第１絶縁部材３と第２絶縁部材４とを一体成形する手段を用いてもよい。この手段を用いることで、第１絶縁部材３と第２絶縁部材４の境界に空隙が存在しないように形成することができる。 On the other hand, the first insulating member 3 and the second insulating member 4 serve as a means for closely connecting the outer peripheral surface of the first insulating member 3 and the inner peripheral surface 42a of the extension portion 42 of the second insulating member 4. It is also possible to use a method of integrally molding the two. By using this means, it is possible to form the boundary between the first insulating member 3 and the second insulating member 4 so that no gap exists.

（外部半導電層）
第１絶縁部材３および第２絶縁部材４の一方または両方の外周（図１の絶縁被覆導体接続体１では、第１絶縁部材３の外周）のうち、中心導体６と隣接しない部分には、外部半導電層５が積層されていることが好ましい。より具体的には、外部半導電層５は、第１絶縁部材３の外周面と第２絶縁部材４の延設部４２とが連結される部分に介挿されるとともに、第２絶縁部材４で被覆されていない第１絶縁部材３の外周面を被覆するように配設されることが好ましい。このように外部半導電層５を配置することで、通電時に発生する電界を、ケーブル遮蔽層と同様に、外部半導電層５によって遮蔽することができるため、電界を安定した状態に保つことができる。また、後述するように、嵌合接続部６１を介して絶縁被覆導体接続体１に電力ケーブルを嵌合させる際に、絶縁被覆導体接続体１の外部半導電層５と電力ケーブルのシールドとが導通するように構成できるため、外部半導電層５の接地を図り、電気的な安全を確保することができる。 (External semiconducting layer)
Among the outer peripheries of one or both of the first insulating member 3 and the second insulating member 4 (the outer periphery of the first insulating member 3 in the insulated conductor connection body 1 of FIG. 1), a portion that is not adjacent to the center conductor 6 includes: Preferably, the outer semiconducting layer 5 is laminated. More specifically, the outer semiconducting layer 5 is inserted in a portion where the outer circumferential surface of the first insulating member 3 and the extension portion 42 of the second insulating member 4 are connected, and the outer semiconducting layer 5 is It is preferable that the first insulating member 3 is disposed so as to cover the outer circumferential surface of the first insulating member 3 which is not covered. By arranging the outer semiconducting layer 5 in this way, the electric field generated when electricity is applied can be shielded by the outer semiconducting layer 5 in the same way as the cable shielding layer, so that the electric field can be kept in a stable state. can. Further, as will be described later, when fitting the power cable to the insulated conductor connection body 1 via the fitting connection portion 61, the outer semiconducting layer 5 of the insulation sheath conductor connection body 1 and the shield of the power cable are connected to each other. Since it can be configured to be electrically conductive, the external semiconductive layer 5 can be grounded and electrical safety can be ensured.

ここで、外部半導電層５の材質は、エチレンプロピレンゴムにカーボンなどの添加剤を配合した導電性のゴムを用いることができる。 Here, as the material of the external semiconductive layer 5, conductive rubber made of ethylene propylene rubber mixed with an additive such as carbon can be used.

外部半導電層５は、介挿される部分（すなわち、第１絶縁部材３の外周面と第２絶縁部材４の延設部４２とが連結される部分に介挿されている他端Ｔ２側の端部）における、第１絶縁部材３の外周面に対向する内周面の少なくとも一部の形状が、曲面状であることが好ましい。より好ましくは、外部半導電層５は、他端Ｔ２側の端部における、中心導体６の長手方向Ｙに沿った断面が、曲率Ｒの円弧またはそれに類する曲面の形状を有する。これにより、中心導体６に電流を流したときに生じる電界のうち、外部半導電層５の曲面状の端部から他端Ｔ２の側に広がる電界が、径方向Ｘに分散して緩和される。そのため、外部半導電層５の端部での電界の集中による、第１絶縁部材３や第２絶縁部材４の絶縁破壊を起こり難くすることができる。 The outer semiconducting layer 5 is inserted into the part to be inserted (that is, the part on the other end T2 side which is inserted to the part where the outer peripheral surface of the first insulating member 3 and the extension part 42 of the second insulating member 4 are connected). It is preferable that at least a portion of the inner circumferential surface of the first insulating member 3 at the end portion) opposite to the outer circumferential surface of the first insulating member 3 has a curved shape. More preferably, the cross section of the outer semiconducting layer 5 along the longitudinal direction Y of the central conductor 6 at the end on the other end T2 side has the shape of a circular arc with a curvature R or a similar curved surface. As a result, among the electric fields generated when a current is passed through the center conductor 6, the electric field that spreads from the curved end of the outer semiconducting layer 5 toward the other end T2 is dispersed in the radial direction X and relaxed. . Therefore, dielectric breakdown of the first insulating member 3 and the second insulating member 4 due to concentration of electric field at the end of the external semiconducting layer 5 can be made less likely to occur.

（嵌合接続部）
絶縁被覆導体接続体１の一端Ｔ１側の部分には、中心導体６と図示しない電力ケーブルの導体との導通を図るように構成された、プラグ形状またはレセプタクル形状をした嵌合接続部６１を有することが好ましい。これにより、嵌合接続部６１と嵌合するような先端形状の電力ケーブルを、嵌合接続部６１で着脱させることが可能になるため、絶縁被覆導体接続体１の他端Ｔ２の側に触れる機会を減らし、端子７やその近傍に触れることによる感電を起こり難くすることができる。 (Mating connection part)
One end T1 side portion of the insulated conductor connector 1 has a plug-shaped or receptacle-shaped fitting connection portion 61 configured to establish electrical continuity between the center conductor 6 and a conductor of a power cable (not shown). It is preferable. This makes it possible to attach and detach the power cable whose tip is shaped to fit with the fitting connection part 61, so that it touches the other end T2 side of the insulated conductor connection body 1. It is possible to reduce the chances of electric shock caused by touching the terminal 7 or its vicinity.

ここで、嵌合接続部６１としては、中心導体６と電力ケーブルの導体との導通を図るとともに、外部半導電層５と電力ケーブルの外部半導電層との導通を図るものであることが好ましい。これにより、外部半導電層５が電力ケーブルなどを介して接地されるため、電気的に安全を確保することができる。 Here, it is preferable that the fitting connection part 61 is one that aims at electrical continuity between the center conductor 6 and the conductor of the power cable, and also aims at electrical continuity between the outer semiconducting layer 5 and the outer semiconducting layer of the power cable. . As a result, the external semiconductive layer 5 is grounded via a power cable or the like, so electrical safety can be ensured.

（端子）
他方で、絶縁被覆導体接続体１の他端Ｔ２の側には、端子７を有することが好ましい。これにより、絶縁被覆導体接続体１の他端Ｔ２側の部分を、後述する二重構造を有する筐体のうち、内側筐体の通電部の導体が一部露出する導体部分に、端子７を介してボルトなどで固定して接続することができるため、より確実かつ強固に絶縁被覆導体接続体１を通電部に固定することができる。 (terminal)
On the other hand, it is preferable to have a terminal 7 on the other end T2 side of the insulated conductor connection body 1. As a result, the terminal 7 is connected to the part of the other end T2 side of the insulated conductor connection body 1 to the conductor part of the casing having a double structure, which will be described later, where the conductor of the current-carrying part of the inner casing is partially exposed. Since the connection can be made by fixing with bolts or the like through the insulated conductor connection body 1, it is possible to more reliably and firmly fix the insulated conductor connection body 1 to the current-carrying part.

ここで、端子７としては、特に限定されないが、例えば、導体材料からなる筒状の内部空間を有する筒状接続部７２と、この筒状接続部７２から中心導体６と反対方向に端部導体７１が延びるものを用いることができる。また、端部導体７１には連結孔７３が形成されており、ボルトなどで通電部に固定することができる。 Here, the terminal 7 is not particularly limited, but may include, for example, a cylindrical connection part 72 having a cylindrical internal space made of a conductive material, and an end conductor connected from the cylindrical connection part 72 in the opposite direction to the center conductor 6. 71 can be used. Further, a connecting hole 73 is formed in the end conductor 71, so that it can be fixed to a current-carrying part with a bolt or the like.

絶縁被覆導体接続体１に端子７を設ける手段としては、特に限定されず、例えば、圧縮端子の内部空間（スリーブ部分）に中心導体６を挿入し、圧縮工具で挟み込むとともに周囲から強い圧力を掛けることで、端子７と中心導体６を密接に接続させることができる。 The means for providing the terminal 7 on the insulated conductor connector 1 is not particularly limited, and for example, the center conductor 6 may be inserted into the internal space (sleeve portion) of the compression terminal, sandwiched with a compression tool, and strong pressure applied from the surroundings. This allows the terminal 7 and the center conductor 6 to be closely connected.

（検電端子部）
絶縁被覆導体接続体１には、第１絶縁部材３に埋設されるように設けられ、検電端子により中心導体６を流れる電流を検知する検電端子部３４を有することが好ましい。ここで、検電端子部３４は、中心導体６との間で必要な誘起電圧が得られるように距離をおき、中心導体６と導通しないように構成される。また、検電端子部３４は、少なくとも検電端子を覆うように構成される蓋３５を有していてもよい。このような検電端子部３４を設けることで、中心導体６に触れることなく中心導体６に電気が流れているか否かを確認することができるため、中心導体６に触れることによる感電を起こり難くすることができる。特に、第１絶縁部材３に埋設される検電端子部３４を、中心導体６と導通しないように構成することで、中心導体６を流れる電流によって誘起される電圧を検知することで中心導体６に電気が流れているか否かを確認することができるため、電気が流れているか否かの確認をより安全に行うことができる。 (voltage detection terminal part)
It is preferable that the insulated conductor connector 1 has a voltage detection terminal portion 34 that is embedded in the first insulating member 3 and that detects the current flowing through the center conductor 6 using a voltage detection terminal. Here, the voltage detection terminal portion 34 is configured to be spaced apart from the center conductor 6 so that a necessary induced voltage can be obtained, and not to be electrically connected to the center conductor 6. Further, the voltage detection terminal section 34 may include a lid 35 configured to cover at least the voltage detection terminal. By providing such a voltage detection terminal section 34, it is possible to check whether electricity is flowing through the center conductor 6 without touching the center conductor 6, so that electric shock due to touching the center conductor 6 is less likely to occur. can do. In particular, by configuring the voltage detecting terminal section 34 buried in the first insulating member 3 so as not to be electrically connected to the center conductor 6, the voltage induced by the current flowing through the center conductor 6 can be detected. Since it is possible to check whether electricity is flowing through the terminal, it is possible to check whether electricity is flowing or not more safely.

（笠部）
また、絶縁被覆導体接続体１の第２絶縁部材４の外周面において、中心導体６の径方向Ｘに延出する、１枚または複数枚の笠部４４ａ～４４ｃを含むことが好ましい。このような笠部４４ａ～４４ｃを有することにより、笠部４４ａ～４４ｃの裏側や、笠部４４ａ～４４ｃの下部近傍の第２絶縁部材４に、塵埃が堆積しない領域が生じる。そのため、長手方向Ｙについての堆積物による電気的経路を断続的にして、トラッキング現象を起こり難くすることができる。また、絶縁被覆導体接続体１の他端Ｔ２側の端子７、７’から、接地されている部分、例えば外部半導電層５までの表面距離を長くすることで、地絡を起こり難くすることができる。 (Kasabe)
Further, it is preferable that the outer peripheral surface of the second insulating member 4 of the insulated conductor connector 1 includes one or more caps 44a to 44c extending in the radial direction X of the center conductor 6. By having such caps 44a to 44c, areas where dust does not accumulate are created on the back side of the caps 44a to 44c and in the second insulating member 4 near the bottom of the caps 44a to 44c. Therefore, the electrical path through the deposits in the longitudinal direction Y can be made intermittent, thereby making it difficult for the tracking phenomenon to occur. Furthermore, by increasing the surface distance from the terminals 7, 7' on the other end T2 side of the insulated conductor connector 1 to the grounded part, for example, the external semiconducting layer 5, it is possible to make it difficult for ground faults to occur. I can do it.

（絶縁被覆導体接続体の用途）
本実施形態に係る絶縁被覆導体接続体１、１’は、例えば図３に示すような、絶縁被覆導体接続体１、１’の中心導体６、６’に通電する通電部８２と、通電部８２に接続され、中心導体６、６’の他端Ｔ２に形成される、端子７、７’によって例示される他端接続部とを、少なくとも内側筐体８０の非密閉の閉鎖空間に収容するとともに、内側筐体８０を外側筐体８１に収容することによって構成される、二重構造の筐体８に用いられる。ここで、絶縁被覆導体接続体１、１’は、中心導体６、６’の一端Ｔ１に形成される、嵌合接続部６１、６１’によって例示される一端接続部が、内側筐体８０から外側に突出して、外側筐体８１の作業空間（外側筐体８１の内部であり、かつ内側筐体８０の外部にある空間）に配置されるように構成される。一般に、非密閉の閉鎖空間を有する筐体は、筐体内部で結露が生じ、筐体内部に塵埃が入りうる構造になっているが、導体接続体に塵埃が堆積しても、導体接続体は基本的に降雨などによって洗浄されない。これに対し、本実施形態では、内側筐体８０および外側筐体８１からなる二重構造の筐体８に絶縁被覆導体接続体１、１’を収容することで、絶縁被覆導体接続体１、１’のうち内側筐体８０に覆われている部分への塵埃の堆積がより低減されるため、絶縁被覆導体接続体１、１’におけるトラッキング現象をより起こり難くすることができる。それとともに、通電部８２や、通電部８２との間で通電する中心導体６、６’が、内側筐体８０や第１絶縁部材３、３’、第２絶縁部材４、４’、外部半導電層５、５’によって保護されるため、導電線の施工や点検の際に、作業者が接触して感電する可能性を低減することができる。 (Applications of insulated conductor connectors)
The insulated conductor connectors 1, 1' according to the present embodiment include a current-carrying part 82 that supplies current to the center conductors 6, 6' of the insulated-coated conductor connectors 1, 1', and a current-carrying part, as shown in FIG. 3, for example. 82 and the other end connection portion exemplified by the terminals 7, 7' formed at the other end T2 of the center conductors 6, 6' are accommodated in at least the non-sealed closed space of the inner casing 80. In addition, it is used for a double-structured housing 8 configured by housing an inner housing 80 in an outer housing 81. Here, in the insulated conductor connectors 1 and 1', one end connection part exemplified by the fitting connection part 61 and 61' formed at one end T1 of the center conductor 6 and 6' is connected to the inner housing 80. It is configured to protrude outward and be placed in the work space of the outer casing 81 (the space inside the outer casing 81 and outside the inner casing 80). Generally, a housing with an unsealed closed space has a structure in which dew condensation occurs inside the housing and dust can enter the housing, but even if dust accumulates on the conductor connector, the conductor connector Basically, it is not washed away by rain or other factors. In contrast, in this embodiment, the insulated conductor connections 1, 1' are accommodated in the double-structured casing 8 consisting of the inner casing 80 and the outer casing 81. Since the accumulation of dust on the portion of 1' covered by the inner casing 80 is further reduced, the tracking phenomenon in the insulated conductor connections 1, 1' can be made more difficult to occur. At the same time, the current-carrying part 82 and the center conductors 6, 6' that conduct electricity between the current-carrying part 82, the inner housing 80, the first insulating members 3, 3', the second insulating members 4, 4', the outer half Since it is protected by the conductive layers 5 and 5', it is possible to reduce the possibility that a worker will come into contact with it and receive an electric shock during construction or inspection of the conductive wire.

内側筐体８０は、絶縁被覆導体接続体１、１’のうち、少なくとも第２絶縁部材４、４’および端子７、７’と、通電部８２と、端子８３の全体を覆うように構成される。これらの部材の表面は、導体や、帯電している可能性のある部材が含まれるため、これらの部材を内側筐体８０で覆うことで、作業者が接触して感電する可能性を低減することができる。このとき、絶縁被覆導体接続体１、１’は、第１絶縁部材３、３’が内側筐体８０の壁面と交わるように設けることが好ましい。このように優れた絶縁性を有する第１絶縁部材３、３’を設けることで、中心導体６、６’と内側筐体８０とが電気的に絶縁されるとともに、絶縁被覆導体接続体１、１’の外周面に設けられた外部半導電層５と内側筐体８０とが同電位となるため、電気的な安全性を高めることができる。加えて、絶縁被覆導体接続体１、１’のうち内側筐体８０の外側の作業空間に突出している部分は、中心導体６、６’の作業空間への露出がごく僅かになり、また、絶縁被覆導体接続体１、１’を内側筐体８０や外側筐体８１を介して接地することで残留電荷を容易に放電することができるため、導電線の施工や点検の際に、作業者が接触して感電する可能性をより低減することができる。 The inner housing 80 is configured to entirely cover at least the second insulating members 4, 4', the terminals 7, 7', the current-carrying part 82, and the terminal 83 of the insulated conductor connectors 1, 1'. Ru. Since the surfaces of these members include conductors and members that may be electrically charged, covering these members with the inner casing 80 reduces the possibility that workers will come into contact with them and receive an electric shock. be able to. At this time, it is preferable that the insulated conductor connectors 1 and 1' be provided so that the first insulating members 3 and 3' intersect with the wall surface of the inner casing 80. By providing the first insulating members 3, 3' having such excellent insulation properties, the center conductors 6, 6' and the inner casing 80 are electrically insulated, and the insulated conductor connector 1, Since the external semiconductive layer 5 provided on the outer circumferential surface of 1' and the inner casing 80 are at the same potential, electrical safety can be improved. In addition, the portions of the insulated conductor connectors 1, 1' that protrude into the work space outside the inner casing 80 have very little exposure of the center conductors 6, 6' to the work space, and By grounding the insulated conductor connectors 1, 1' through the inner casing 80 and outer casing 81, residual charges can be easily discharged. This can further reduce the possibility of electric shock due to contact.

本実施形態に係る絶縁被覆導体接続体１、１’が用いられる筐体８は、電力ケーブル幹線の終端や延長、分岐に用いられる。 The housing 8 in which the insulated conductor connectors 1, 1' according to the present embodiment is used is used for terminating, extending, and branching power cable main lines.

例えば、電力ケーブル幹線を終端させる場合は、内側筐体８０の中にある通電部８２に、絶縁被覆導体接続体１の端子７をボルトなどで固定するとともに、絶縁被覆導体接続体１の嵌合接続部６１と嵌合する先端形状の嵌合接続部８６を有する電力ケーブル８５を、嵌合接続部６１に嵌合させる。ここで、通電部８２に、１本以上の分岐線８４を、端子８３を介してボルトなどで固定してもよい。このとき、電力ケーブル８５’および端子７’の一方または両方は、通電部８２に接続されない。これにより、電力ケーブル８５に接続された通電部８２が、電力ケーブル幹線の終端となる。 For example, when terminating a power cable main line, the terminals 7 of the insulated conductor connector 1 are fixed to the current-carrying part 82 in the inner housing 80 with bolts, and the fitting of the insulated conductor connector 1 is A power cable 85 having a fitting connection part 86 having a tip shape that fits into the connection part 61 is fitted into the fitting connection part 61 . Here, one or more branch lines 84 may be fixed to the current-carrying portion 82 via the terminals 83 with bolts or the like. At this time, one or both of the power cable 85' and the terminal 7' are not connected to the current-carrying section 82. Thereby, the current-carrying portion 82 connected to the power cable 85 becomes the terminal end of the power cable main line.

また、電力ケーブル幹線を延長させる場合は、内側筐体８０の中にある通電部８２に、絶縁被覆導体接続体１の端子７をボルトなどで固定するとともに、絶縁被覆導体接続体１’の端子７’をボルトなどで固定する。次いで、絶縁被覆導体接続体１、１’の嵌合接続部６１、６１’と嵌合する先端形状の嵌合接続部８６、８６’を有する電力ケーブル８５、８５’を、それぞれ嵌合接続部６１、６１’に嵌合させる。この場合、分岐線８４は通電部８２に接続されない。これにより、電力ケーブル幹線は、電力ケーブル８５から、通電部８２を介して電力ケーブル８５’に延長することができる。 In addition, when extending the power cable main line, the terminal 7 of the insulated conductor connection body 1 is fixed to the current-carrying part 82 in the inner housing 80 with bolts, and the terminal of the insulated conductor connection body 1' is Fix 7' with bolts, etc. Next, the power cables 85, 85' having tip-shaped fitting connection parts 86, 86' that fit with the fitting connection parts 61, 61' of the insulated conductor connectors 1, 1' are connected to the fitting connection parts 61, 61', respectively. 61 and 61'. In this case, branch line 84 is not connected to current-carrying section 82 . Thereby, the power cable main line can be extended from the power cable 85 to the power cable 85' via the current carrying part 82.

また、電力ケーブル幹線を分岐させる場合は、内側筐体８０の中にある通電部８２に、絶縁被覆導体接続体１の端子７をボルトなどで固定するとともに、絶縁被覆導体接続体１’の端子７’をボルトなどで固定する。また、この通電部８２に、１本以上の分岐線８４の端子８３をボルトなどで固定する。次いで、絶縁被覆導体接続体１、１’の嵌合接続部６１、６１’と嵌合する先端形状の嵌合接続部８６、８６’を有する電力ケーブル８５、８５’を、それぞれ嵌合接続部６１、６１’に嵌合させる。これにより、本線となる電力ケーブル８５、８５’から、１本以上の分岐線８４に、電流を分岐させることができる。 In addition, when branching the power cable trunk line, the terminals 7 of the insulated conductor connector 1 are fixed to the current-carrying part 82 in the inner housing 80 with bolts, and the terminals of the insulated conductor connector 1' are Fix 7' with bolts, etc. Furthermore, terminals 83 of one or more branch lines 84 are fixed to this current-carrying portion 82 with bolts or the like. Next, the power cables 85, 85' having tip-shaped fitting connection parts 86, 86' that fit with the fitting connection parts 61, 61' of the insulated conductor connectors 1, 1' are connected to the fitting connection parts 61, 61', respectively. 61 and 61'. This allows current to be branched from the main power cables 85, 85' to one or more branch lines 84.

このように、本実施形態に係る絶縁被覆導体接続体１、１’は、通電部８２に接続される絶縁被覆導体接続体１、１’の数や、分岐線８４の数に応じて、電力ケーブル幹線の終端、延長または分岐に用いることができる。 In this way, the insulated conductor connectors 1, 1' according to the present embodiment have power output depending on the number of insulated conductor connectors 1, 1' connected to the current-carrying part 82 and the number of branch lines 84. Can be used for terminating, extending or branching cable trunk lines.

筐体８としては、接続箱、配電盤、分電盤、開閉器盤、変圧器盤、受電設備盤などとして用いられるものが挙げられるが、これらに限定されない。 Examples of the housing 8 include, but are not limited to, those used as a connection box, a switchboard, a distribution board, a switch board, a transformer board, a power receiving equipment board, and the like.

本実施形態に係る絶縁被覆導体接続体１は、高電圧の電力を供給する用途、より具体的には、鉄道の駅舎や踏切、信号機などに電力を供給する用途に用いることが好ましいが、これに限定されない。本実施形態に係る絶縁被覆導体接続体１は、特に、非密閉の閉鎖空間を形成する内側筐体を備えた二重構造の筐体と併用することで、通電部や端子への接触による感電の危険や塵埃の堆積を防止または低減しながら、トラッキング現象および地絡などの電気的事故を起こり難くすることができるため、高電圧の電力を供給する用途に好ましく用いることができる。 The insulated conductor connector 1 according to the present embodiment is preferably used for supplying high-voltage power, more specifically, for supplying power to railway station buildings, railroad crossings, traffic lights, etc. but not limited to. In particular, the insulated conductor connector 1 according to the present embodiment can be used in combination with a dual-structure housing that includes an inner housing that forms a non-sealed closed space, thereby preventing electric shock due to contact with current-carrying parts or terminals. This makes it possible to prevent or reduce the danger of dust and the accumulation of dust, while also making tracking phenomena and electrical accidents such as ground faults less likely to occur. Therefore, it can be preferably used in applications that supply high-voltage power.

１、１’ 絶縁被覆導体接続体
２電気絶縁部材
３、３’ 第１絶縁部材
３１第１内周面
３２縮径部
３２ａ縮径部の外周面
３３凹部
３４検電端子部
３５蓋
４、４’ 第２絶縁部材
４１第２内周面
４２延設部
４２ａ延設部の内周面
４３凸部
４４ａ～４４ｃ笠部
５、５’ 外部半導電層
６、６’ 中心導体
６１、６１’、８６、８６’ 嵌合接続部
７、７’、８３、９３ａ～９３ｃ、９４ａ～９４ｃ端子
７１端部導体
７２筒状接続部
７３連結孔
８筐体
８０内側筐体
８２、９５ａ～９５ｃ通電部
８４分岐線
８５、８５’、９１ａ～９１ｃ、９２ａ～９２ｃ電力ケーブル
９６ａ～９６ｃ、９７ａ～９７ｃ端末部材
Ｔ１一端
Ｔ２他端
Ｘ径方向
Ｙ長手方向
ｒ１凸部の内径
ｒ２第１絶縁部材の外径 1, 1' Insulated conductor connection body 2 Electrical insulating member 3, 3' First insulating member 31 First inner peripheral surface 32 Reduced diameter part 32a Outer peripheral surface of reduced diameter part 33 Recessed part 34 Voltage detection terminal part 35 Lid 4, 4 ' Second insulating member 41 Second inner circumferential surface 42 Extended portion 42a Inner circumferential surface of extended portion 43 Convex portions 44a to 44c Shade portions 5, 5' Outer semiconductive layer 6, 6' Center conductor 61, 61', 86, 86' Fitting connection part 7, 7', 83, 93a to 93c, 94a to 94c Terminal 71 End conductor 72 Cylindrical connection part 73 Connection hole 8 Housing 80 Inner housing 82, 95a to 95c Current carrying part 84 Branch line 85, 85', 91a~91c, 92a~92c Power cable 96a~96c, 97a~97c Terminal member T1 One end T2 Other end

Claims

An insulated coated conductor connection body having a rod-shaped center conductor and an electrically insulating member covering the center conductor ,
The center conductor has a one end connection portion formed at one end and an other end connection portion formed at the other end,
The electrically insulating member is
a first insulating member made of ethylene propylene rubber and having a cylindrical first inner peripheral surface;
a second insulating member made of silicone rubber and having a cylindrical second inner peripheral surface ;
The first insulating member is arranged such that the first inner circumferential surface is in close contact with the outer circumferential surface of the one end side portion of the center conductor,
The second insulating member is arranged such that the second inner circumferential surface is in close contact with the outer circumferential surface of the other end side portion of the center conductor,
The insulated conductor connection body is
A current-carrying part that energizes the center conductor, and the other end connecting part connected to the current-carrying part are accommodated in at least an unsealed closed space of an inner casing;
The current-carrying part is connected to the center conductor via the other end connecting part, and
an insulated conductor connection body used for accommodating the inner casing in an outer casing, making the one end connection part protrude outward from the inner casing, and disposing it in a work space of the outer casing; .

The second insulating member has an extending portion separated from the outer circumferential surface of the center conductor at one end side,
The insulated conductor connection body according to claim 1, wherein an outer circumferential surface of the other end of the first insulating member and an inner circumferential surface of the extending portion of the second insulating member are connected in close contact with each other. .

The connection between the outer circumferential surface of the other end of the first insulating member and the inner circumferential surface of the extension part of the second insulating member is achieved by connecting the outer circumferential surface of the other end of the first insulating member to the other end. A first tapered surface formed to decrease in diameter toward one end and a second tapered surface formed to increase in diameter toward one end on an inner circumferential surface of the extended portion of the second insulating member; 3. The insulated conductor connection body according to claim 2, wherein the insulated conductor connection body is formed by combining the insulated conductor connection body.

It is inserted into a portion where the outer circumferential surface of the first insulating member and the extension part of the second insulating member are connected to cover the outer circumferential surface of the first insulating member that is not covered with the second insulating member. further comprising an outer semiconducting layer disposed to
The insulating coating according to claim 2 or 3, wherein the outer semiconductive layer has a curved shape at least in part of the inner circumferential surface of the inserted portion that faces the outer circumferential surface of the first insulating member. Conductor connection body.

The insulated conductor connector has a plug-shaped or receptacle-shaped fitting connection portion, which is the one-end connection portion , at one end portion thereof, and the other end portion, which is connected to the center conductor, at the other end portion. The insulated conductor connection body according to any one of claims 1 to 4, comprising a terminal as a connection part .

The insulation coating according to any one of claims 1 to 5, which is used for terminating, extending, or branching a power cable trunk line depending on the number of the insulation coating conductor connectors and branch lines connected to the current carrying part. Conductor connection body.

The insulated conductor connection body according to any one of claims 1 to 6, further comprising a voltage detection terminal part embedded in the first insulating member and detecting a current flowing through the center conductor.