JPH0694950A - Optical fiber cable - Google Patents

Optical fiber cable

Info

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
Application number
JP4241625A
Other languages
Japanese (ja)
Other versions
JP3101094B2 (en
Inventor
Shimizu Yokoi
井 清 水 横
Yoshiro Takamatsu
松 善 郎 高
Kazufumi Tabata
畑 和 文 田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Welding and Engineering Co Ltd
Original Assignee
Nippon Steel Welding and Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Welding and Engineering Co Ltd filed Critical Nippon Steel Welding and Engineering Co Ltd
Priority to JP04241625A priority Critical patent/JP3101094B2/en
Publication of JPH0694950A publication Critical patent/JPH0694950A/en
Application granted granted Critical
Publication of JP3101094B2 publication Critical patent/JP3101094B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

PURPOSE:To prevent the damage of a cable coupler when the metallic tube is brought into contact with a hot line. CONSTITUTION:An optical fiber is passed through a flexible metallic tube coated with a synthetic resin, and the ends of the optical fiber are joined respectively to the optical fiber connector fixed to both ends of the metallic tube to constitute an optical fiber cable. Plural split metallic tubes 1a and 1b are connected through a hollow insulating cylinder 4 to insulate the adjacent tubes 1a and 1b from each other, and the integrated optical fibers 10 and 11 are passed through the inner spaces of the tubes 1a and 1b and cylinder 4. Besides, the tube 2a is connected to a connector 3a through a hollow insulating cylinder 6.

Description

【発明の詳細な説明】Detailed Description of the Invention

【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.

【図面の簡単な説明】[Brief description of drawings]

【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.

【符号の説明】[Explanation of symbols]

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)

【特許請求の範囲】[Claims] 【請求項1】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.
【請求項2】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.
【請求項3】中空絶縁筒に前記可撓性金属管に接地用導
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.
JP04241625A 1992-09-10 1992-09-10 Optical fiber cable Expired - Fee Related JP3101094B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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