JPS6113202B2 - - Google Patents
Info
- Publication number
- JPS6113202B2 JPS6113202B2 JP50101314A JP10131475A JPS6113202B2 JP S6113202 B2 JPS6113202 B2 JP S6113202B2 JP 50101314 A JP50101314 A JP 50101314A JP 10131475 A JP10131475 A JP 10131475A JP S6113202 B2 JPS6113202 B2 JP S6113202B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- optical fiber
- space
- fiber bundle
- length
- 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.)
- Expired
Links
- 239000013307 optical fiber Substances 0.000 claims description 30
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000012815 thermoplastic material Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Insulated Conductors (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光フアイバーを通信媒体として含むケ
ーブルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cable containing optical fiber as a communication medium.
光フアイバーは折れるまでに伸びが少なく、光
フアイバーを含むケーブルの屈曲または引込みに
伴なうひずみはフアイバーを折損を生じ易い。
Optical fibers have little elongation before breaking, and strain caused by bending or pulling of cables containing optical fibers tends to cause the fibers to break.
本発明の目的はケーブルの屈曲または引込みの
際に光フアイバーを折損する危険を最も小さくし
た光フアイバー入りケーブルの構造を提供するこ
とである。
SUMMARY OF THE INVENTION An object of the present invention is to provide an optical fiber cable structure that minimizes the risk of breaking the optical fibers when the cable is bent or pulled in.
本発明は上記問題点解決のために、与えられた
長さの単一のひずみ受容管にかこまれた空間内に
少くとも一部分が当該空間の一部だけを占める如
く配置した光フアイバーの束からなる通信ケーブ
ルであつて、前記ひずみ受容管２にかこまれた前
記空間３内に配置された光フアイバー束１の前記
部分の長さを少くとも前記管２を真直ぐにした場
合は前記管２の長さよりも長いものとし、これに
より光フアイバー束の前記部分を前記空間３内で
うねらせ、前記管２の曲げにともなう管の長さの
変動を補償できるようにすると共に、光フアイバ
ー束の断面積を前記空間の断面積の20％未満と
し、かような断面積の差があることおよび光フア
イバーの長さが長いことにより光フアイバー束は
ケーブル使用の間に大きな振幅でうねることがで
きるようにし、かつ前記管２には内部補強体４を
設けてケーブルの屈曲または引込みの際に光フア
イバー束が折損する危険をさらに軽減したことを
特徴とする通信ケーブルを提供する。
In order to solve the above-mentioned problems, the present invention consists of a bundle of optical fibers arranged in a space surrounded by a single strain receiving tube of a given length so that at least a part thereof occupies only a part of the space. In the communication cable, the length of the portion of the optical fiber bundle 1 disposed in the space 3 surrounded by the strain receiving tube 2 is at least as long as the length of the tube 2 when the tube 2 is made straight. length, thereby making it possible to undulate said portion of the fiber optic bundle within said space 3 and to compensate for fluctuations in the length of the tube due to bending of said tube 2, as well as to prevent breaks in the fiber optic bundle. The area shall be less than 20% of the cross-sectional area of said space, such that the difference in cross-sectional area and the long length of the optical fibers will allow the optical fiber bundle to undulate with large amplitude during use of the cable. To provide a communication cable characterized in that the tube 2 is provided with an internal reinforcing body 4 to further reduce the risk of breakage of the optical fiber bundle when the cable is bent or pulled in.
ひずみ受容管内に光フアイバー束をゆるく配置
したことと、当該管内に収容される光フアイバー
束の部分を当該管の長さよりも長くしたこととは
相俟つて、ひずみ受容管を真直ぐにした場合光フ
アイバー束は当該管内でうねつた波状をなして存
在することとなり、管の曲げをともなう長さの変
動を補償でき、ひいては光フアイバー束は折損を
招くかもしれない応力から完全に解放されること
になる。 The fact that the optical fiber bundle is placed loosely within the strain receiving tube and that the portion of the optical fiber bundle accommodated within the tube is longer than the length of the tube means that when the strain receiving tube is straightened, the light The fiber bundle will exist in an undulating wave shape within the tube, which can compensate for the variation in length that accompanies bending of the tube, and thus the optical fiber bundle can be completely freed from stresses that might lead to breakage. become.
本発明の実施例を添付の図面を参照しつつ以下
に説明する。
Embodiments of the invention will now be described with reference to the accompanying drawings.
第１図に示すケーブルの構造はひずみ部材より
なる円筒管２の中に配置した８本の光フアイバ１
の束より成立つている。管２の内部のフアイバ１
で占められていないスペース３は管内のフアイバ
の動きを妨げる〓軟い〓材料または空気で満して
よい。光フアイバ１はそれを収容している管２よ
りも長く、管に対して相対的に動くことができす
なわち管２はフアイバ１のまわりにゆるくはまつ
ている。８本のフアイバの束はたとえば綜合直径
が約5.08mmであり管の内径が約12.7mmであつて、
フアイバは管によつて限定される断面積の約16％
を占めるだけである。 The structure of the cable shown in Fig. 1 consists of eight optical fibers 1 arranged in a cylindrical tube 2 made of a strain member.
It is made up of a bunch of. Fiber 1 inside tube 2
The unoccupied space 3 may be filled with a soft material or air that impedes the movement of the fiber within the tube. The optical fiber 1 is longer than the tube 2 containing it and is movable relative to the tube, ie the tube 2 is loosely wrapped around the fiber 1. For example, a bundle of eight fibers has a combined diameter of about 5.08 mm and an inner diameter of the tube of about 12.7 mm.
The fiber is approximately 16% of the cross-sectional area limited by the tube.
It only occupies .
光フアイバはガラスよりなり、熱可塑性材料た
とえば必要に応じてポリ塩化ビニルまたはポリエ
チレンを個々に被覆してもよい。ひずみ材料より
なる管２は熱可塑性材料たとえばポリエチレンで
作られる。 The optical fibers are made of glass and may be individually coated with a thermoplastic material such as polyvinyl chloride or polyethylene if desired. The strained material tube 2 is made of a thermoplastic material, for example polyethylene.
第１図にしたがつて作られたケーブルはダクト
の中で曲げられたりダクトの中に引込まれたりす
るとき、それらの取扱いに伴なうひずみが円筒管
２によりまた管２の非常にゆるいはまり具合やフ
アイバと管との綜合的な最小の物理的接触によつ
て事実上生じ、光フアイバ自体に伝えられる応力
は最小となりしたがつて光フアイバを折損する危
険は最小となる。 When cables made in accordance with FIG. Due to the overall minimal physical contact between the fiber and the tube, the stresses transmitted to the optical fiber itself are minimized and the risk of breaking the optical fiber is therefore minimized.
管２は一体をなす補強部材４を含む内部補強体
によつて補強されている。補強部材４は線や繊維
の編組またはテープであつてもよい。線は鋼でも
よくまた繊維はナイロンのような強力なポリエス
テルであつてもよい。 The tube 2 is reinforced by an internal reinforcement including an integral reinforcing member 4. The reinforcing member 4 may be a wire or fiber braid or a tape. The wire may be steel and the fiber may be a strong polyester such as nylon.
本発明のケーブルは次の順序にしたがつて作ら
れる。ガラスの光フアイバは金属導体を絶縁する
ために用いるものと同様な押出し処理によつて熱
可塑性材料を施される。その被覆を施した８本の
光フアイバは１つに束ねて撚り合わせられ、押出
し機の心管ホルダに導かれる。この押出し機は光
フアイバが押出す管よりも長くて管の中でうねる
ように心管ホルダのまわりに管２を押出す。これ
はたとえば管２を押出すよりも早い速度で心管ホ
ルダの中にフアイバの束を給送することによつて
達成される。必要に応じて、絶縁金属導体を収容
するケーブルに鉱油を充てんするために通常用い
るような注入処理によつて管の押出し工程の間に
管２の中に鉱油を注入してもよい。 The cable of the present invention is made according to the following sequence. Glass optical fibers are coated with thermoplastic materials by extrusion processes similar to those used to insulate metal conductors. The eight coated optical fibers are bundled together, twisted together, and introduced into the heart tube holder of the extruder. This extruder extrudes the tube 2 around the heart tube holder so that the optical fiber is longer than the tube being extruded and winds up within the tube. This is achieved, for example, by feeding the fiber bundle into the heart tube holder at a faster rate than the tube 2 is pushed out. If desired, mineral oil may be injected into the tube 2 during the tube extrusion process by an injection process such as that commonly used for filling cables containing insulated metal conductors with mineral oil.
第１図の構造の内部補強体４は、肉厚の薄い管
２ａを押出し、通常の編組機によつてその上に線
または繊維の編組を形成し、次いでその上に別の
肉厚の薄い管２ｂを押出す工程よりなる処理によ
つて施される。これらの処理は２つの管２ａ，２
ｂが一緒に結合されて１つの管を形成しその中に
編組を埋込むようにして行なわれる。別の方法と
して内部補強体は通常の手段により肉厚の薄い管
２ａのまわりに長手方向に巻付けた編組テープで
あつてもよい。 The internal reinforcement 4 of the structure of FIG. This is done by a process consisting of extruding the tube 2b. These treatments are performed using two pipes 2a, 2
b are joined together to form a tube into which the braid is embedded. Alternatively, the internal reinforcement may be a braided tape wrapped longitudinally around the thin walled tube 2a by conventional means.
前述の構造は８本の光フアイバについて示した
けれども、その数は必要に応じて変えられること
は云うまでもない。 Although the above structure is shown for eight optical fibers, it will be appreciated that the number may be varied as desired.
第１図は本発明の実施例によるケーブルの断面
図である。
１…光フアイバ、２…円筒管、３…スペース、
４…内部補強部体、２ａ，２ｂ…薄肉厚管。
FIG. 1 is a cross-sectional view of a cable according to an embodiment of the invention. 1... Optical fiber, 2... Cylindrical tube, 3... Space,
4... Internal reinforcement body, 2a, 2b... Thin walled tube.
Claims (1)
まれた空間内に少くとも一部分が当該空間の一部
だけを占める如く配置した光フアイバーの束から
なる通信ケーブルであつて、前記ひずみ受容管２
にかこまれた前記空間３内に配置された光フアイ
バー束１の前記部分の長さを少くとも前記管２を
真直ぐにした場合は前記管２の長さよりも長いも
のとし、これにより光フアイバー束の前記部分を
前記空間３内でうねらせ、前記管２の曲げにとも
なう管の長さの変動を補償できるようにすると共
に、光フアイバー束の断面積を前記空間の断面積
の20％未満とし、かような断面積の差があること
および光フアイバーの長さが長いことにより光フ
アイバー束はケーブル使用の間に大きな振幅でう
ねることができるようにし、かつ前記管２には内
部補強部体４を設けてケーブルの屈曲または引込
みの際に光フアイバー束が折損する危険をさらに
軽減したことを特徴とする通信ケーブル。1 A communication cable consisting of a bundle of optical fibers arranged in a space surrounded by a single strain receiving tube of a given length so that at least a portion thereof occupies only a portion of the space, the tube 2
The length of the portion of the optical fiber bundle 1 disposed in the space 3 surrounded by the tube is at least longer than the length of the tube 2 when the tube 2 is straightened. The portion of the optical fiber bundle is undulated within the space 3 to compensate for variations in tube length due to bending of the tube 2, and the cross-sectional area of the optical fiber bundle is less than 20% of the cross-sectional area of the space. , such a difference in cross-sectional area and the long length of the optical fibers enable the optical fiber bundle to undulate with large amplitude during cable use, and said tube 2 is provided with an internal reinforcement body. 4 to further reduce the risk of breakage of the optical fiber bundle when the cable is bent or pulled in.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3694674A GB1461151A (en) | 1974-08-22 | 1974-08-22 | Optical fibre cables |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5169643A JPS5169643A (en) | 1976-06-16 |
| JPS6113202B2 true JPS6113202B2 (en) | 1986-04-12 |
Family
ID=10392488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50101314A Expired JPS6113202B2 (en) | 1974-08-22 | 1975-08-22 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS6113202B2 (en) |
| ES (1) | ES440405A1 (en) |
| FR (1) | FR2282648A1 (en) |
| GB (1) | GB1461151A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4078853A (en) * | 1976-02-25 | 1978-03-14 | Bell Telephone Laboratories, Incorporated | Optical communication cable |
| CA1112310A (en) * | 1977-05-13 | 1981-11-10 | Peter Fearns | Overhead electric transmission systems |
| DE2858812C3 (en) * | 1977-12-05 | 1996-11-21 | Stc Plc | Optical fiber submarine cable |
| IT1121754B (en) | 1977-12-05 | 1986-04-23 | Int Standard Electric Corp | OPTICAL COMMUNICATION CABLE |
| JPS5494248U (en) * | 1977-12-15 | 1979-07-04 | ||
| US4278835A (en) * | 1977-12-16 | 1981-07-14 | The Post Office | Submarine communication cable including optical fibres within an electrically conductive tube |
| AU526350B2 (en) * | 1979-07-23 | 1983-01-06 | Pirelli General Cable Works Ltd. | Optical fibres cable |
| JPS5811904A (en) * | 1981-07-16 | 1983-01-22 | Nippon Telegr & Teleph Corp <Ntt> | Optical cable |
| DE3318233C2 (en) * | 1983-05-19 | 1985-10-31 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Optical cable element or cable and method for its manufacture |
| DE3319433A1 (en) * | 1983-05-28 | 1984-11-29 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | OPTICAL CABLE |
| US5015063A (en) * | 1989-10-25 | 1991-05-14 | At&T Bell Laboratories | Optical fiber cable core |
| GB2247340B (en) * | 1990-08-24 | 1994-06-15 | Stc Plc | Limited fire hazard cable |
| CN108387982B (en) * | 2018-02-23 | 2019-12-03 | 烽火通信科技股份有限公司 | A kind of Full-dry optical cable and its manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4831963A (en) * | 1971-08-29 | 1973-04-26 | ||
| JPS4865949A (en) * | 1971-12-11 | 1973-09-10 | ||
| JPS5137662A (en) * | 1974-07-30 | 1976-03-30 | Pirelli |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3691001A (en) * | 1968-11-14 | 1972-09-12 | Olympus Optical Co | Flexible protecting sheath of an elongated flexible optical fiber bundle |
| US3732425A (en) * | 1970-12-18 | 1973-05-08 | Gen Electric | Light conduit with double cladding |
| DE2302662C2 (en) * | 1973-01-19 | 1983-09-01 | Siemens AG, 1000 Berlin und 8000 München | Communication cable |
| FR2260806B1 (en) * | 1974-02-13 | 1976-10-08 | Fort Francois | |
| JPS5117027U (en) * | 1974-07-25 | 1976-02-07 |
-
1974
- 1974-08-22 GB GB3694674A patent/GB1461151A/en not_active Expired
-
1975
- 1975-08-18 FR FR7525496A patent/FR2282648A1/en active Granted
- 1975-08-22 JP JP50101314A patent/JPS6113202B2/ja not_active Expired
- 1975-08-22 ES ES440405A patent/ES440405A1/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4831963A (en) * | 1971-08-29 | 1973-04-26 | ||
| JPS4865949A (en) * | 1971-12-11 | 1973-09-10 | ||
| JPS5137662A (en) * | 1974-07-30 | 1976-03-30 | Pirelli |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2282648A1 (en) | 1976-03-19 |
| GB1461151A (en) | 1977-01-13 |
| JPS5169643A (en) | 1976-06-16 |
| ES440405A1 (en) | 1977-03-01 |
| FR2282648B1 (en) | 1979-06-15 |
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