JPH0694950A - Optical fiber cable - Google Patents
Optical fiber cableInfo
- Publication number
- JPH0694950A JPH0694950A JP4241625A JP24162592A JPH0694950A JP H0694950 A JPH0694950 A JP H0694950A JP 4241625 A JP4241625 A JP 4241625A JP 24162592 A JP24162592 A JP 24162592A JP H0694950 A JPH0694950 A JP H0694950A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- metal tube
- hollow insulating
- flexible metal
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光ファイバケ−ブルに
関し、特に、両端に光ファイバコネクタを有し離れた位
置にある電気機器又は電気回路間の信号伝送に利用する
光ファイバケ−ブルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable, and more particularly to an optical fiber cable having optical fiber connectors at both ends and used for signal transmission between electric devices or electric circuits located at remote positions.
【０００２】[0002]
【従来の技術】光通信ケ−ブルは、光ファイバの引張強
度が弱いため、一次樹脂被覆した光ファイバと抗張力線
を樹脂シ−ス又は樹脂チュ−ブに一体に収納したものが
一般であったが、このようなケ−ブルは、光ファイバ径
が極細径であるにもかかわらずケ−ブル外径が大きくし
かもケ−ブル重量が重い、という問題があった。そこ
で、光ファイバを細径金属管に通した、金属管被覆光フ
ァイバケ−ブルが開発された。金属管被覆光ファイバケ
−ブルは、外径が小さくしかも軽い。金属管被覆光ファ
イバケ−ブルの一態様が特開平３−２６０６０７号公報
に開示されている。これにおいては、シ−ムレス金属管
と光ファイバコネクタの間に、可撓性が高いたわみ金属
管が介挿されているので、光ファイバケ−ブルと電気機
器等との接続箇所においてケ−ブル配架（特に曲げ）の
自由度が高い。2. Description of the Related Art In an optical communication cable, the tensile strength of an optical fiber is weak, and therefore an optical fiber coated with a primary resin and a tensile strength wire are generally housed in a resin sheath or a resin tube. However, such a cable has a problem that the outer diameter of the cable is large and the weight of the cable is heavy although the diameter of the optical fiber is extremely small. Therefore, a metal tube-coated optical fiber cable in which an optical fiber is passed through a thin metal tube has been developed. The metal tube coated optical fiber cable has a small outer diameter and is light. One mode of a metal tube coated optical fiber cable is disclosed in Japanese Patent Laid-Open No. 3-260607. In this case, since a flexible metal tube with high flexibility is inserted between the seamless metal tube and the optical fiber connector, the cable distribution is made at the connection point between the optical fiber cable and the electric equipment. High flexibility of the rack (especially bending).
【０００３】両端に光ケ−ブルコネクタを装備した金属
管被覆光ファイバケ−ブルは、屋内の電気機器等の信号
配線に適するのみならず、軽く細径であるので屋外で使
用する電気機器等の信号線に適する。例えば電車線路等
の保守，点検のための、高所作業車上の点検用電気機器
と、空中架線又は地上架線の状態を検出するセンサ又は
電気機器との間の信号伝送、もしくは高所作業車上の点
検用電気機器と地上電気機器等との間の信号伝送では、
架線に電気が通ったままの活線状態でデ−タを採取する
と電磁波等ノイズの影響を受け易いので、伝送信号は光
信号に変換し光ファイバケ−ブルで信号を伝送するのが
好ましい。これによれば単線当りの伝送情報量も多く確
保しうる。このような用途では、金属管が活線に接触し
た場合の接触事故を防ぐために、金属管を合成樹脂で被
覆する。A metal tube-coated optical fiber cable equipped with optical cable connectors at both ends is not only suitable for signal wiring of indoor electrical equipment, but also has a light and thin diameter, so that it can be used for electrical equipment used outdoors. Suitable for signal lines. For example, signal transmission between an electric device for inspection on an aerial work vehicle and a sensor or an electric device for detecting the state of an aerial overhead contact line or an overhead contact line for maintenance and inspection of a railway track, or an aerial work vehicle For signal transmission between the above inspection electrical equipment and ground electrical equipment,
It is preferable to convert a transmission signal into an optical signal and transmit the signal with an optical fiber cable, since data is easily affected by noise such as electromagnetic waves if data is collected while the overhead wire is live while electricity is flowing. According to this, a large amount of transmission information per single line can be secured. In such an application, the metal tube is coated with a synthetic resin in order to prevent a contact accident when the metal tube comes into contact with a live wire.
【０００４】[0004]
【発明が解決しようとする課題】電気機器およびそれに
接続するケ−ブルを携帯する作業や、高所作業車上でケ
−ブルを動かす作業や高所作業車の移動などにより、ケ
−ブルが物に当る確率が高く、これにより金属管の合成
樹脂外被が破れ、活線に当って破れを生じたときには、
金属管全体すなわち光ファイバケ−ブルの一端のコネク
タから他端のコネクタまでが活線電位となる。このよう
な金属管の活線との接触は、ケ−ブルに接続された電気
機器に障害をもたらすことがあり得る。例えば、活線が
高圧線であると金属管と電気機器との間に短絡を生じこ
れにより電気機器が故障するとかの事故に至る。The cable can be moved by carrying electric equipment and a cable connected to the electric equipment, moving the cable on an aerial work vehicle, or moving the aerial work vehicle. The probability of hitting an object is high, and when this causes the synthetic resin jacket of the metal tube to rupture and hit the live wire to cause rupture,
The entire metal tube, that is, the connector from one end of the optical fiber cable to the connector at the other end has a hot line potential. The contact of such a metal tube with a live wire may cause damage to electric equipment connected to the cable. For example, if the live line is a high-voltage line, a short circuit occurs between the metal tube and the electric device, which causes an accident such as a failure of the electric device.
【０００５】本願発明は、金属管が活線と接触したとき
のケ−ブル接続機器の障害を防止することを目的とす
る。An object of the present invention is to prevent a cable connecting device from being damaged when a metal tube comes into contact with a live wire.
【０００６】[0006]
【課題を解決するための手段】本願の第１番の発明は、
合成樹脂被覆を施した可撓性金属管に光ファイバを通
し、該可撓性金属管の両端に固着した光ファイバコネク
タのそれぞれに前記光ファイバの各端を結合した光ファ
イバケ−ブルにおいて、前記合成樹脂被覆を施した可撓
性金属管は分断した複数個(1a,1b)として中空絶縁筒(4)
を介して連結して隣り合う可撓性金属管(1a,1b)の間を
絶縁し、前記光ファイバ(10,11)は一体連続のまま可撓
性金属管(1a,1b)および中空絶縁筒(4)の内空間に通した
ことを特徴とする。The first invention of the present application is as follows:
An optical fiber cable in which an optical fiber is passed through a flexible metal tube coated with a synthetic resin, and each end of the optical fiber is coupled to each of the optical fiber connectors fixed to both ends of the flexible metal tube. A flexible metal tube coated with synthetic resin is divided into multiple (1a, 1b) hollow insulation tubes (4)
Insulate between adjacent flexible metal pipes (1a, 1b) by connecting via, and the optical fibers (10, 11) remain flexible as one continuous flexible metal pipe (1a, 1b) and hollow insulation It is characterized by being passed through the inner space of the cylinder (4).
【０００７】本願の第２番の発明は、合成樹脂被覆を施
した可撓性金属管に光ファイバを通し、該可撓性金属管
の両端に固着した光ファイバコネクタのそれぞれに前記
光ファイバの各端を結合した光ファイバケ−ブルにおい
て、前記合成樹脂被覆を施した可撓性金属管(2a)を中空
絶縁筒(6)を介して前記光ファイバコネクタ(3a)に接続
し、前記光ファイバ(10,11)は一体連続のまま可撓性金
属管(2a)および中空絶縁筒(6)の内空間に通したことを
特徴とする。According to a second aspect of the present invention, an optical fiber is passed through a flexible metal tube coated with a synthetic resin, and the optical fiber connector is fixed to both ends of the flexible metal tube. In an optical fiber cable in which each end is coupled, the flexible metal tube (2a) coated with the synthetic resin is connected to the optical fiber connector (3a) through a hollow insulating tube (6), and the optical fiber is connected. (10, 11) is characterized in that it is passed through the inner space of the flexible metal tube (2a) and the hollow insulating cylinder (6) as it is integrally continuous.
【０００８】なお、カッコ内の記号は、図面に示し後述
する実施例の対応要素を示す。The symbols in parentheses indicate the corresponding elements in the embodiments shown in the drawings and described later.
【０００９】[0009]
【作用】第１番の発明によれば、金属管(1a,1b)が分断
されて中空絶縁筒(4)を介して互に連結されているの
で、ある金属管(1a)が活線に接触しても、他の金属管(1
b)には活線の電位は加わらない。すなわち金属管を介し
ての異常通電が中空絶縁筒(4)で遮断され、ケ−ブルに
接続された電気機器等は保護される。According to the first aspect of the invention, since the metal tubes (1a, 1b) are divided and connected to each other through the hollow insulating cylinder (4), a certain metal tube (1a) becomes a live wire. Even if it comes in contact with other metal tubes (1
The live line potential is not applied to b). That is, the abnormal current flow through the metal tube is cut off by the hollow insulating cylinder (4), and the electric equipment connected to the cable is protected.
【００１０】第２番の発明によれば、金属管(2a)を中空
絶縁筒(6)を介して光ファイバコネクタ(3a)に接続して
いるので、金属管(1a,1b)が活線に接触してもコネクタ
(3a)には活線の電位が加わらない。すなわち金属管を介
しての異常通電が中空絶縁筒(4)で遮断され、コネクタ
に接続された電気機器等は保護される。According to the second aspect of the invention, since the metal tube (2a) is connected to the optical fiber connector (3a) through the hollow insulating tube (6), the metal tube (1a, 1b) is a live wire. Even if it touches the connector
No live line potential is applied to (3a). That is, the abnormal current flow through the metal tube is blocked by the hollow insulating cylinder (4), and the electric equipment connected to the connector is protected.
【００１１】本願各発明の他の目的および特徴は図面を
参照した以下の実施例の説明より明らかになろう。Other objects and features of each invention of the present application will be apparent from the following description of embodiments with reference to the drawings.
【００１２】[0012]
【実施例】図１に本願各発明の一実施例を示す。この実
施例では、光ファイバケ−ブルの主幹１ａ，１ｂは、横
断面形状がＳ字形のステンレス薄条板を螺旋巻きした、
スパイラルたわみ管９（図２）の外周面を合成樹脂で被
覆（樹脂被覆８：図２）し、管内に２本の光ファイバ線
（コア＋クラッド）１０，１１（図２）を通した２心の
金属管被覆光ファイバケ−ブルであり、第１種の中空絶
縁筒４で互に連結されている。分岐管２ａ，２ｂは、同
一構造の金属管に１本の光ファイバ線を通した１心の金
属管被覆光ファイバケ−ブルであり、それぞれ一端が第
２種の中空絶縁筒４で主管１ｂに連結されている。分岐
管２ａ，２ｂの他端は第３種の中空絶縁筒６，７で光フ
ァイバコネクタ３に連結されている。FIG. 1 shows an embodiment of each invention of the present application. In this embodiment, the main trunks 1a and 1b of the optical fiber cable are formed by spirally winding a stainless thin strip having an S-shaped cross section.
The outer peripheral surface of the spiral flexible tube 9 (Fig. 2) was covered with a synthetic resin (resin coating 8: Fig. 2), and two optical fiber wires (core + clad) 10 and 11 (Fig. 2) were passed through the tube. It is an optical fiber cable coated with a metal tube of the core, and is connected to each other by a first type hollow insulating tube 4. The branch pipes 2a and 2b are one-core metal pipe-coated optical fiber cables in which one optical fiber line is passed through a metal pipe of the same structure, and one end of each is a hollow insulating cylinder 4 of the second kind to the main pipe 1b. It is connected. The other ends of the branch pipes 2a and 2b are connected to the optical fiber connector 3 by the third type hollow insulating cylinders 6 and 7.
【００１３】図２に、第１種の中空絶縁筒４の縦断面を
示す。中空絶縁筒４の両端には、主幹１ａ，１ｂの金属
管を受入れる比較的に太径の穴４２ａ，４２ｂがあり、
これらの穴に、光ファイバ線１０，１１を通す小径の穴
４２ｃが連続している。主幹１ａの金属管は穴４２ａに
挿入され、ビス４３で締付け固定されている。主幹１ｂ
の金属管は穴４２ｂに挿入され、ビス４４で締付け固定
されている。中空絶縁筒４の長手方向中央部には筒４を
横断する方向に樹脂注入用の穴４２ｄが開けられてお
り、この穴４２ｄを通して高耐圧絶縁用樹脂４５が穴４
２ｃに注入され、絶縁用樹脂４５が穴４２ｃを閉じてい
る。主幹１ａの金属管の右端部と主幹１ｂの金属管の左
端部とが穴４２ｃで分離しているので、また光ファイバ
線１０，１１は絶縁体であるので、主幹１ａと１ｂは、
中空絶縁筒４で絶縁されている。穴４２ｃ内の高耐圧絶
縁用樹脂４５は、主幹１ａと１ｂの間に高電圧が加わっ
たときの、穴４２ｃ内の沿面放電を阻止するので、高電
圧耐圧特性が良い。FIG. 2 shows a vertical cross section of the first type hollow insulating cylinder 4. At both ends of the hollow insulating cylinder 4, there are relatively large diameter holes 42a, 42b for receiving the metal pipes of the main trunks 1a, 1b,
A small diameter hole 42c through which the optical fiber lines 10 and 11 are passed is continuous with these holes. The metal pipe of the main trunk 1a is inserted into the hole 42a, and is fixed by tightening the screw 43. Master 1b
The metal pipe of is inserted into the hole 42b and is fixed by tightening with a screw 44. A hole 42d for resin injection is made in the central portion of the hollow insulating cylinder 4 in the longitudinal direction so as to traverse the cylinder 4, and a resin 45 for high-voltage insulation is provided through the hole 42d.
2c, the insulating resin 45 closes the hole 42c. Since the right end of the metal tube of the main trunk 1a and the left end of the metal tube of the main trunk 1b are separated by the hole 42c, and since the optical fiber lines 10 and 11 are insulators, the main trunks 1a and 1b are
It is insulated by the hollow insulating cylinder 4. The high withstand voltage insulating resin 45 in the hole 42c prevents creeping discharge in the hole 42c when a high voltage is applied between the trunks 1a and 1b, and thus has a high withstand voltage characteristic.
【００１４】図１に示す分岐用の第２種の中空絶縁筒５
は、左半分は中空絶縁筒４と同様な構造であるが、右半
分は太径であって右端には２つの、分岐管２ａ，２ｂの
金属管をそれぞれ受入れる比較的に太径の穴があり、こ
れらの穴に連なる小径の２つの穴が左半分にある１つの
小径の穴に連続している。すなわち右半分が２股になっ
ている。左側の１つの小径の穴と右側の２つの小径の穴
がつながる位置に樹脂注入用の穴５２ｄが開けられてお
り、この穴５２ｄを通して高耐圧絶縁用樹脂５５が内部
の小径の穴（３個）に注入されている。この第２種の中
空絶縁筒５は、主幹１ｂと分岐管２ａ，２ｂの間を絶縁
し、その内部の高耐圧絶縁用樹脂５５は、主幹１ｂと分
岐管２ａ，２ｂの間に高電圧が加わったときの、中空絶
縁筒５内部の沿面放電を阻止するので、高電圧耐圧特性
が良い。A second type hollow insulating cylinder 5 for branching shown in FIG.
Has a structure similar to that of the hollow insulating cylinder 4 in the left half, but has a relatively large diameter hole in the right half for receiving two metal pipes of the branch pipes 2a and 2b, each of which has a large diameter in the right half. Yes, two small-diameter holes connected to these holes are continuous with one small-diameter hole in the left half. That is, the right half has two legs. A resin injection hole 52d is formed at a position where one small diameter hole on the left side and two small diameter holes on the right side are connected. Through this hole 52d, the high-voltage insulation resin 55 has a small diameter hole inside (three holes). ) Has been injected. The second-type hollow insulating cylinder 5 insulates between the main trunk 1b and the branch pipes 2a, 2b, and the high-voltage insulating resin 55 inside thereof has a high voltage between the main trunk 1b and the branch pipes 2a, 2b. Since creeping discharge inside the hollow insulating cylinder 5 is prevented when applied, high voltage withstand characteristics are good.
【００１５】図３に、図１に示す第３種の中空絶縁筒６
の縦断面を示す。この第３種の中空絶縁筒６は分岐管２
ａにコネクタ３ａを連結すると共に、第２種の中空絶縁
筒５で分岐した一本の光ファイバ線１０をコネクタ３ａ
に案内するものである。第３種の中空絶縁筒６は大略で
第１種の中空絶縁筒６と同様な構造であるが、その右端
の開口が、コネクタ３ａの尾端スリ−ブを受入れるよう
に更に太径となっている。分岐管２ａの金属管は穴６２
ａに挿入され、ビス６３で締付け固定されている。この
実施例では、分岐管２ａの金属管からコネクタ３ａにノ
イズ電圧や過電圧が加わるのを防止する安全策として更
に、ア−ス線６７を固着した座金がビス６３で中空絶縁
筒６に固着されている。ビス６３は、分岐管２ａの金属
管の外被（合成樹脂）を刺し通ってスパイラルたわみ管
に達してそれを圧縮しており、これによりスパイラルた
わみ管にア−ス線６７が電気的に接続されている。コネ
クタ３ａの尾端スリ−ブは穴６２ｂに挿入され、ビス６
４で締付け固定されている。中空絶縁筒６の長手方向中
央部には筒６を横断する方向に樹脂注入用の穴６２ｄが
開けられており、この穴６２ｄを通して高耐圧絶縁用樹
脂６５が穴６２ｃに注入され、絶縁用樹脂６５が穴６２
ｃを閉じている。分岐管２ａの金属管の右端部とコネク
タ３ａの尾端スリ−ブとが穴６２ｃで分離しているの
で、また光ファイバ線１０は絶縁体であるので、分岐管
２ａとコネクタ３ａは、中空絶縁筒６で絶縁されてい
る。穴６２ｃ内の高耐圧絶縁用樹脂６５は、分岐管２ａ
コネクタ３ａの間に高電圧が加わったときの、穴６２ｃ
内の沿面放電を阻止するので、高電圧耐圧特性が良い。FIG. 3 shows a third type hollow insulating cylinder 6 shown in FIG.
The longitudinal section of is shown. This third type hollow insulating cylinder 6 is a branch pipe 2
The connector 3a is connected to a, and the optical fiber line 10 branched by the second type hollow insulating tube 5 is connected to the connector 3a.
To guide you. The third-type hollow insulating cylinder 6 has a structure similar to that of the first-type hollow insulating cylinder 6, but its right end opening has a larger diameter so as to receive the tail end sleeve of the connector 3a. ing. The metal pipe of the branch pipe 2a has a hole 62
It is inserted into a and is fixed by tightening with screws 63. In this embodiment, as a safety measure to prevent noise voltage or overvoltage from being applied to the connector 3a from the metal pipe of the branch pipe 2a, a washer to which the ground wire 67 is fixed is fixed to the hollow insulating cylinder 6 with a screw 63. ing. The screw 63 pierces the sheath (synthetic resin) of the metal pipe of the branch pipe 2a to reach the spiral flexible pipe and compresses it, whereby the ground wire 67 is electrically connected to the spiral flexible pipe. Has been done. The tail end sleeve of the connector 3a is inserted into the hole 62b, and the screw 6
It is fixed by tightening at 4. A hole 62d for resin injection is formed in the central portion of the hollow insulating cylinder 6 in the longitudinal direction so as to cross the cylinder 6, and the high withstand voltage insulating resin 65 is injected into the hole 62c through the hole 62d. 65 is a hole 62
c is closed. Since the right end of the metal pipe of the branch pipe 2a and the tail end sleeve of the connector 3a are separated by the hole 62c, and since the optical fiber line 10 is an insulator, the branch pipe 2a and the connector 3a are hollow. It is insulated by the insulating cylinder 6. The high-voltage insulating resin 65 in the hole 62c is the branch pipe 2a.
Hole 62c when high voltage is applied between the connectors 3a
Since the internal creeping discharge is prevented, the high voltage withstand voltage characteristic is good.
【００１６】第３種の中空絶縁筒７は、中空絶縁筒６と
全く同一構造であり、分岐管２ｂにコネクタ３ｂを連結
すると共に、第２種の中空絶縁筒５で分岐したもう一本
の光ファイバ線１１をコネクタ３ｂに案内する。The third type hollow insulating cylinder 7 has exactly the same structure as the hollow insulating cylinder 6, and connects the connector 3b to the branch pipe 2b and branches the second type hollow insulating cylinder 5 into another. The optical fiber line 11 is guided to the connector 3b.
【００１７】上述の第１種の中空絶縁筒４は、図１には
１個のみを示すが、主幹（１ａ，１ｂ）および分岐管
（２ａ，２ｂ）の長さと所要の区分長に対応して所要数
用いられる。分岐管２ａ，２ｂの長さが比較的に大きい
ときにはこれらも途中で分断され、そこに第１種の中空
絶縁筒（４）が介挿される。しかし代表的には、図１に
示すケ−ブル要素と同様な要素が、図１の主幹１ａの左
端に連なる形で対称に存在する。Only one hollow insulation cylinder 4 of the above-mentioned type 1 is shown in FIG. 1, but it corresponds to the length of the main trunk (1a, 1b) and the branch pipe (2a, 2b) and the required section length. The required number is used. When the lengths of the branch pipes 2a and 2b are relatively large, they are also divided in the middle, and the first type hollow insulating cylinder (4) is inserted therein. However, typically, an element similar to the cable element shown in FIG. 1 exists symmetrically so as to be connected to the left end of the main trunk 1a of FIG.
【００１８】以上説明した図１に示す光ファイバケ−ブ
ルは、金属管がスパイラルたわみ管であるので可撓性が
きわめて高く、比較的に細径で軽量であるので、車両上
等比較的に狭い空間での配線がきわめて容易であり、そ
れに接続された電気機器等の移動に対する追従移動性が
高い。その分ケ−ブルが物に当る可能性が高く、金属管
外被が破れ易い。しかし例えばケ−ブルの主幹１ａが高
圧架線に当ってその外被が破れ主幹１ａに高圧が加わっ
ても、これは第１種の絶縁筒４で主幹１への通絡が阻止
される。主幹１ｂが高圧架線に当ってその外被が破れて
も、分岐管２ａ，２ｂには高圧が加わらない。したがっ
て主幹１ａ，１ｂが高圧架線に当っても、コネクタ３
ａ，３ｂに接続された電気機器等に高圧が加わることが
なく、また高圧架線の地絡を生じない。すなわち電気機
器等と高圧架線に故障を生じない。分岐管２ａ又は２ｂ
が高圧架線に当りそれらの外被が破れるとア−ス線６７
を介して高圧架線は地絡するが、コネクタ３ａ，３ｂに
接続された電気機器等は保護される。The above-described optical fiber cable shown in FIG. 1 has extremely high flexibility because the metal tube is a spiral flexible tube, and is relatively thin and lightweight, so that it is relatively narrow on a vehicle or the like. Wiring in space is extremely easy, and the following mobility with respect to the movement of electric devices connected to it is high. There is a high possibility that the cable will hit the object, and the metal tube jacket is easily broken. However, for example, even if the main trunk 1a of the cable hits the high-voltage overhead wire and its outer cover is broken and a high voltage is applied to the main trunk 1a, the first type insulating cylinder 4 prevents the main trunk 1 from being entangled. Even if the main trunk 1b hits the high-voltage overhead wire and its outer cover is broken, high pressure is not applied to the branch pipes 2a and 2b. Therefore, even if the trunks 1a and 1b hit the high voltage overhead line, the connector 3
High voltage is not applied to the electric equipment connected to a and 3b, and the ground fault of the high voltage overhead wire does not occur. That is, no failure occurs in the electric equipment and the high voltage overhead line. Branch pipe 2a or 2b
When the high-voltage overhead wires contact the outer wires and the outer wires are torn, the ground wire 67
Although the high voltage overhead wire is grounded via the connector, the electric devices and the like connected to the connectors 3a and 3b are protected.
【００１９】以上に説明した実施例では、中空絶縁筒４
〜７内には、沿面放電を阻止する意図で高耐圧絶縁樹脂
（４５等）を入れているが、この注入量を多くして金属
管やコネクタ尾端スリ−ブ内に十分に進入させると、こ
の樹脂（４５等）によって金属管やコネクタと絶縁筒と
の固着が行なわれる。この場合、ビスを省略することも
できる。In the embodiment described above, the hollow insulating cylinder 4 is used.
High-voltage insulating resin (45, etc.) is put in the inside of 7 to prevent creeping discharge, but if this injection amount is increased enough to enter the metal pipe or connector tail end sleeve, The resin (45 or the like) fixes the metal tube or connector to the insulating cylinder. In this case, the screw can be omitted.
【００２０】[0020]
【発明の効果】以上の通り、金属管(1a,1b)を分断し中
空絶縁筒(4)を介して金属管を互に連結するので、ある
金属管(1a)が活線に接触しても、他の金属管(1b)には活
線の電位は加わらない。すなわち金属管を介しての異常
通電が中空絶縁筒(4)で遮断され、ケ−ブルに接続され
た電気機器等は保護される。As described above, since the metal pipes (1a, 1b) are divided and the metal pipes are connected to each other through the hollow insulating cylinder (4), a certain metal pipe (1a) comes into contact with the live wire. However, the potential of the live line is not applied to the other metal tube (1b). That is, the abnormal current flow through the metal tube is cut off by the hollow insulating cylinder (4), and the electric equipment connected to the cable is protected.
【００２１】また、金属管(2a)を中空絶縁筒(6)を介し
て光ファイバコネクタ(3a)に接続するので、金属管(1a,
1b)が活線に接触してもコネクタ(3a)には活線の電位が
加わらない。すなわち金属管を介しての異常通電が中空
絶縁筒(4)で遮断され、コネクタに接続された電気機器
等は保護される。Further, since the metal tube (2a) is connected to the optical fiber connector (3a) via the hollow insulating tube (6), the metal tube (1a,
Even if 1b) contacts the live wire, the potential of the live wire is not applied to the connector (3a). That is, the abnormal current flow through the metal tube is blocked by the hollow insulating cylinder (4), and the electric equipment connected to the connector is protected.
【図１】 本願各発明に共通の一実施例の主要部を示す
平面図である。FIG. 1 is a plan view showing a main part of an embodiment common to each invention of the present application.
【図２】 図１のII−II線拡大断面図である。FIG. 2 is an enlarged sectional view taken along line II-II of FIG.
【図３】 図１のIII−III線拡大断面図である。FIG. 3 is an enlarged sectional view taken along line III-III in FIG.
１ａ，１ｂ：光ファイバケ−ブルの主幹 ２ａ，２ｂ：光ファイバケ−ブルの分岐管 ３ａ，３ｂ：光ファイバケ−ブルのコネクタ ４：第１種の中空絶縁筒 ４１：筒体 ４２ａ〜４２ｄ：穴 ４３，４４：ビス ４５：絶縁樹脂 ５：第２種の中空
絶縁筒 ６，７：第３種の中空絶縁筒 ６１：筒体 ６２ａ〜６２ｄ：穴 ６３，６４：ビス ６５：絶縁樹脂 ６６：座金 ６７：ア−ス線 ８：樹脂被覆 ９：スパイラルたわみ管 １０，１１：光ファイバ線1a, 1b: Master of optical fiber cable 2a, 2b: Branch pipe of optical fiber cable 3a, 3b: Connector of optical fiber cable 4: First type hollow insulating cylinder 41: Cylindrical body 42a to 42d: Hole 43 , 44: Screws 45: Insulating resin 5: Second type hollow insulating tube 6,7: Third type hollow insulating tube 61: Cylindrical bodies 62a to 62d: Holes 63, 64: Screws 65: Insulating resin 66: Washer 67 : Earth wire 8: Resin coating 9: Spiral flexible tube 10, 11: Optical fiber wire
Claims (3)
ァイバを通し、該可撓性金属管の両端に固着した光ファ
イバコネクタのそれぞれに前記光ファイバの各端を結合
した光ファイバケ−ブルにおいて、 前記合成樹脂被覆を施した可撓性金属管は分断した複数
個として中空絶縁筒を介して連結して隣り合う可撓性金
属管の間を絶縁し、前記光ファイバは一体連続のまま可
撓性金属管および中空絶縁筒の内空間に通したことを特
徴とする光ファイバケ−ブル。1. An optical fiber cable in which an optical fiber is passed through a flexible metal tube coated with a synthetic resin, and each end of the optical fiber is connected to each of optical fiber connectors fixed to both ends of the flexible metal tube. -In the optical fiber, the flexible metal tube coated with the synthetic resin is connected as a plurality of divided flexible metal tubes through a hollow insulating tube to insulate adjacent flexible metal tubes, and the optical fiber is integrally continuous. An optical fiber cable characterized by being passed through the inner space of a flexible metal tube and a hollow insulating tube as it is.
ァイバを通し、該可撓性金属管の両端に固着した光ファ
イバコネクタのそれぞれに前記光ファイバの各端を結合
した光ファイバケ−ブルにおいて、 前記合成樹脂被覆を施した可撓性金属管を中空絶縁筒を
介して前記光ファイバコネクタに接続し、前記光ファイ
バは一体連続のまま可撓性金属管および中空絶縁筒の内
空間に通したことを特徴とする光ファイバケ−ブル。2. An optical fiber cable in which an optical fiber is passed through a flexible metal tube coated with a synthetic resin, and each end of the optical fiber is connected to each of optical fiber connectors fixed to both ends of the flexible metal tube. -In the cable, the flexible metal tube coated with the synthetic resin is connected to the optical fiber connector via a hollow insulating tube, and the optical fiber remains in one continuous state inside the flexible metal tube and the hollow insulating tube. An optical fiber cable characterized by being passed through a space.
体を電気的に接続するための導電手段を備えた、請求項
１又は請求項２記載の光ファイバケ−ブル。3. The optical fiber cable according to claim 1, wherein the hollow insulating cylinder is provided with a conductive means for electrically connecting a conductor for grounding to the flexible metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04241625A JP3101094B2 (en) | 1992-09-10 | 1992-09-10 | Optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04241625A JP3101094B2 (en) | 1992-09-10 | 1992-09-10 | Optical fiber cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0694950A true JPH0694950A (en) | 1994-04-08 |
| JP3101094B2 JP3101094B2 (en) | 2000-10-23 |
Family
ID=17077110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04241625A Expired - Fee Related JP3101094B2 (en) | 1992-09-10 | 1992-09-10 | Optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3101094B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007114282A (en) * | 2005-10-18 | 2007-05-10 | Ikeno Tsuken Kk | Installation method of optical fiber cable |
| US9513450B2 (en) | 2012-02-29 | 2016-12-06 | 3M Innovative Properties Company | Optical fiber cable splicing box |
-
1992
- 1992-09-10 JP JP04241625A patent/JP3101094B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007114282A (en) * | 2005-10-18 | 2007-05-10 | Ikeno Tsuken Kk | Installation method of optical fiber cable |
| US9513450B2 (en) | 2012-02-29 | 2016-12-06 | 3M Innovative Properties Company | Optical fiber cable splicing box |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3101094B2 (en) | 2000-10-23 |
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