JP2011228208A

JP2011228208A - Core wire protection method

Info

Publication number: JP2011228208A
Application number: JP2010098956A
Authority: JP
Inventors: Fumihiro Honma; 文洋本間; Yoshiharu Akiyama; 佳春秋山; Shoichi Kuramoto; 昇一倉本; Kazuaki Yano; 和明矢野; Toshihisa Masuda; 俊久枡田
Original assignee: Nippon Telegraph and Telephone Corp
Current assignee: Nippon Telegraph and Telephone Corp
Priority date: 2010-04-22
Filing date: 2010-04-22
Publication date: 2011-11-10

Abstract

PROBLEM TO BE SOLVED: To provide a core wire protection method that prevents occurrence of discharge at the time of flow of an overcurrent.SOLUTION: A core wire 1 and conductive connection means 5 are brought into conduction by pressing an insulation coating 3, which covers the core wire 1, against a V-letter groove 5a of the conductive connection means 5 and a lightning arrester 7 is installed between the conductive connection means 5 and an adjacent conductive connection means 5', so it becomes possible to cause the lightning arrester 7 to operate before discharge occurs at a part where the insulation coating is removed, which prevents occurrence of discharge at the time of flow of an overcurrent. In addition, there is also provided a method using a three-pole lightning arrester whose one end is connected to the ground.

Description

本発明は、心線を保護する技術に関する。 The present invention relates to a technique for protecting a core wire.

図３は、従来の心線接続方法を示す図である。従来は、心線１を覆う絶縁被覆３に金属等で製造された導電性接続手段５のＶ字溝５ａを押し付けて、心線１に到達するまで絶縁被覆３を断面状に切断し、到達した心線１の一領域とＶ字溝５ａの一領域とを接触させて心線１と導電性接続手段５とを電気的に導通（接続）させることにより、他の心線（不図示）との導通を実現していた。なお、非特許文献１には、このよう心線接続方法を有する心線接続装置が記載されている。 FIG. 3 is a diagram illustrating a conventional core wire connection method. Conventionally, the insulating coating 3 covering the core wire 1 is pressed against the V-shaped groove 5a of the conductive connection means 5 made of metal or the like, and the insulating coating 3 is cut into a cross-section until reaching the core wire 1 One core wire 1 and one region of the V-shaped groove 5a are brought into contact with each other to electrically connect (connect) the core wire 1 and the conductive connecting means 5 to another core wire (not shown). The continuity with was realized. Non-Patent Document 1 describes a core wire connecting device having such a core wire connecting method.

株式会社八光電機製作所、「ＮＴＴ殿関連納入物品」、［online］、［平成22年4月6日検索］、インターネット<http://www.hachiko-denki.co.jp/html/pdf/catalogue/ntt.pdf>Yako Electric Manufacturing Co., Ltd., “NTT-related products”, [online], [Search April 6, 2010], Internet <http://www.hachiko-denki.co.jp/html/pdf/ catalogue / ntt.pdf>

導通を実現するよう心線１とＶ字溝５ａとの接触部分において絶縁被覆３が取り除かれている（剥いだ状態になっている）ため、その部分の絶縁耐力が低下し、接触部分に雷サージ等の過電流が流れると放電を起こして接続不良が生じるという問題があった。 Since the insulating coating 3 is removed (in a peeled state) at the contact portion between the core wire 1 and the V-shaped groove 5a so as to realize conduction, the dielectric strength of that portion is reduced, and lightning is applied to the contact portion. When an overcurrent such as a surge flows, there is a problem that a discharge occurs and a connection failure occurs.

本発明は、上記を鑑みてなされたものであり、過電流が流れた際に生じる放電の発生を防止することを課題とする。 This invention is made | formed in view of the above, and makes it a subject to prevent generation | occurrence | production of the discharge which arises when an overcurrent flows.

請求項１に記載の心線保護方法は、心線を覆う絶縁被覆を導電性接続手段の切込部に押し付けて、前記心線と前記導電性接続手段とを導通させる第１のステップと、隣接する前記導電性接続手段の間に避雷器を取り付ける第２のステップと、を有することを特徴とする。 The method of protecting a core wire according to claim 1, wherein the insulation coating covering the core wire is pressed against the cut portion of the conductive connecting means, and the core wire and the conductive connecting means are made conductive. And a second step of installing a lightning arrester between the adjacent conductive connection means.

本発明によれば、心線を覆う絶縁被覆を導電性接続手段の切込部に押し付けて、心線と導電性接続手段とを導通させ、隣接する導電性接続手段の間に避雷器を取り付けるため、絶縁被覆が取り除かれた部分で放電が起きる前に避雷器を動作させることが可能となり、過電流が流れた際に生じる放電の発生を防止することが可能となる。 According to the present invention, the insulation coating covering the core wire is pressed against the cut portion of the conductive connection means, the core wire and the conductive connection means are conducted, and the lightning arrester is attached between the adjacent conductive connection means. It is possible to operate the lightning arrester before the discharge occurs in the portion where the insulation coating is removed, and it is possible to prevent the occurrence of the discharge that occurs when an overcurrent flows.

請求項２に記載の心線保護方法は、請求項１に記載の心線保護方法において、前記避雷器は、一端がグランドに接続された３極避雷器であって、サージ電流を前記グランドに流すことを特徴とする。 The core wire protection method according to claim 2 is the core wire protection method according to claim 1, wherein the lightning arrester is a three-pole lightning arrester having one end connected to the ground, and allows a surge current to flow to the ground. It is characterized by.

本発明によれば、過電流が流れた際に生じる放電の発生を防止することができる。 According to the present invention, it is possible to prevent the occurrence of discharge that occurs when an overcurrent flows.

第１の実施の形態に係る心線保護方法を示す図である。It is a figure which shows the core wire protection method which concerns on 1st Embodiment. 第２の実施の形態に係る心線保護方法を示す図である。It is a figure which shows the core wire protection method which concerns on 2nd Embodiment. 従来の心線接続方法を示す図である。It is a figure which shows the conventional core wire connection method.

以下、一実施の形態について図面を用いて説明する。 Hereinafter, an embodiment will be described with reference to the drawings.

〔第１の実施の形態〕
図１は、第１の実施の形態に係る心線保護方法を示す図である。最初に、心線１を覆う絶縁被覆３に金属等で製造された導電性接続手段５のＶ字溝５ａを押し付けて、心線１に到達するまで絶縁被覆３を断面状に切断することにより、心線１の一領域とＶ字溝５ａの一領域とを接触させ、心線１と導電性接続手段５とを電気的に導通（接続）させる。次に、隣接する導電性接続手段５’との間に避雷器７を取り付ける。 [First Embodiment]
FIG. 1 is a diagram showing a core wire protecting method according to the first embodiment. First, the V-shaped groove 5a of the conductive connection means 5 made of metal or the like is pressed against the insulating coating 3 covering the core wire 1, and the insulating coating 3 is cut into a cross-section until the core wire 1 is reached. Then, one region of the core wire 1 and one region of the V-shaped groove 5a are brought into contact with each other, and the core wire 1 and the conductive connecting means 5 are electrically connected (connected). Next, the lightning arrester 7 is attached between the adjacent conductive connection means 5 '.

本実施の形態によれば、心線１を覆う絶縁被覆３を導電性接続手段５のＶ字溝５ａに押し付けて、心線１と導電性接続手段５とを導通させ、隣接する導電性接続手段５’との間に避雷器７を取り付けるので、絶縁被覆３が取り除かれた部分で放電が起きる前に避雷器７を動作させることが可能となり、過電流が流れた際に生じる放電の発生を防止することが可能となる。すなわち、絶縁被覆３が取り除かれた隣接する心線間に過電圧が印加された場合であっても、避雷器７が動作して心線間の過電圧を抑え、絶縁被覆３が取り除かれた部分での放電を防止することが可能となる。 According to the present embodiment, the insulation coating 3 covering the core wire 1 is pressed against the V-shaped groove 5a of the conductive connection means 5 so that the core wire 1 and the conductive connection means 5 are electrically connected, and the adjacent conductive connection is made. Since the lightning arrester 7 is attached to the means 5 ′, it becomes possible to operate the lightning arrester 7 before the discharge occurs in the portion where the insulation coating 3 is removed, and the occurrence of the discharge that occurs when the overcurrent flows is prevented. It becomes possible to do. That is, even when an overvoltage is applied between adjacent core wires from which the insulation coating 3 has been removed, the surge arrester 7 operates to suppress overvoltage between the core wires, and at the portion where the insulation coating 3 has been removed. It becomes possible to prevent discharge.

〔第２の実施の形態〕
図２は、第２の実施の形態に係る心線保護方法を示す図である。最初に、心線１を覆う絶縁被覆３に金属等で製造された導電性接続手段５のＶ字溝５ａを押し付けて、心線１に到達するまで絶縁被覆３を断面状に切断することにより、心線１の一領域とＶ字溝５ａの一領域とを接触させ、心線１と導電性接続手段５とを電気的に導通（接続）させる。次に、隣接する導電性接続手段５’との間に、一端がグランドに接続された３極避雷器７’を取り付けて、雷等の過電圧が印加された際に３極避雷器７’を介して接地（グランド）にサージ電流を流す。 [Second Embodiment]
FIG. 2 is a diagram showing a core wire protecting method according to the second embodiment. First, the V-shaped groove 5a of the conductive connection means 5 made of metal or the like is pressed against the insulating coating 3 covering the core wire 1, and the insulating coating 3 is cut into a cross-section until the core wire 1 is reached. Then, one region of the core wire 1 and one region of the V-shaped groove 5a are brought into contact with each other, and the core wire 1 and the conductive connecting means 5 are electrically connected (connected). Next, a tripolar lightning arrester 7 ′ having one end connected to the ground is attached between the adjacent conductive connection means 5 ′, and when an overvoltage such as lightning is applied, the tripolar lightning arrester 7 ′ is interposed. Apply surge current to ground.

本実施の形態によれば、心線１を覆う絶縁被覆３を導電性接続手段５のＶ字溝５ａに押し付けて、心線１と導電性接続手段５とを導通させ、隣接する導電性接続手段５’との間に一端がグランドに接続された３極避雷器７’を取り付けるので、絶縁被覆３が取り除かれた部分で放電が起きる前に３極避雷器７’を動作させることが可能となり、過電流が流れた際に生じる放電の発生を防止することが可能となる。すなわち、絶縁被覆３が取り除かれた隣接する心線間に過電圧が印加された場合であっても、３極避雷器７’が動作して心線間の過電圧を抑え、絶縁被覆３が取り除かれた部分での放電を防止することが可能となる。 According to the present embodiment, the insulation coating 3 covering the core wire 1 is pressed against the V-shaped groove 5a of the conductive connection means 5 so that the core wire 1 and the conductive connection means 5 are electrically connected, and the adjacent conductive connection is made. Since a three-pole lightning arrester 7 ′ having one end connected to the ground is attached between the means 5 ′, it becomes possible to operate the three-pole lightning arrester 7 ′ before a discharge occurs in a portion where the insulating coating 3 has been removed. It is possible to prevent the occurrence of discharge that occurs when an overcurrent flows. That is, even when an overvoltage is applied between adjacent core wires from which the insulation coating 3 has been removed, the tripolar surge arrester 7 'operates to suppress overvoltage between the core wires, and the insulation coating 3 has been removed. It becomes possible to prevent discharge at the portion.

また、本実施の形態によれば、サージ電流をグランドに流すので、放電の発生をより確実に防止して心線を保護することが可能となると共に、接続不良を防止することが可能となる。 Further, according to the present embodiment, since a surge current is caused to flow to the ground, it is possible to more reliably prevent the occurrence of discharge and protect the core wire, and it is possible to prevent poor connection. .

なお、各実施の形態では、心線１と導電性接続手段５とを電気的に導通（接続）した後に避雷器を取り付けしたが、予め避雷器が取り付けたれた導電性接続手段５を用いてもよい。 In each embodiment, the lightning arrester is attached after the core wire 1 and the conductive connection means 5 are electrically connected (connected). However, the conductive connection means 5 to which the lightning arrester is attached in advance may be used. .

１…心線
３…絶縁被覆
５…導電性接続手段
５ａ…Ｖ字溝（切込部）
７…避雷器
７’…３極避雷器 DESCRIPTION OF SYMBOLS 1 ... Core wire 3 ... Insulation coating 5 ... Conductive connection means 5a ... V-shaped groove (cut part)
7 ... Arrester 7 '... Tripolar Arrester

Claims

A first step of pressing the insulating coating covering the core wire against the cut portion of the conductive connecting means to make the core wire and the conductive connecting means conductive;
A second step of installing a lightning arrester between adjacent said conductive connection means;
A method of protecting a core wire, comprising:

The lightning arrester is a three-pole lightning arrester with one end connected to the ground,
2. The method of protecting a core wire according to claim 1, wherein a surge current is passed through the ground.