JPH0656448B2 - Optical fiber cable - Google Patents
Optical fiber cableInfo
- Publication number
- JPH0656448B2 JPH0656448B2 JP57037208A JP3720882A JPH0656448B2 JP H0656448 B2 JPH0656448 B2 JP H0656448B2 JP 57037208 A JP57037208 A JP 57037208A JP 3720882 A JP3720882 A JP 3720882A JP H0656448 B2 JPH0656448 B2 JP H0656448B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- layer
- tube
- fiber cable
- diameter
- 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 - Lifetime
Links
- 239000013307 optical fiber Substances 0.000 title claims description 42
- 229910052751 metal Inorganic materials 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 43
- 239000000314 lubricant Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000019271 petrolatum Nutrition 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 39
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 125000006850 spacer group Chemical group 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 229910052755 nonmetal Inorganic materials 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920000271 Kevlar® Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 235000015110 jellies Nutrition 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 239000004761 kevlar Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 235000013311 vegetables Nutrition 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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
- G02B6/4488—Protective covering using metallic tubes
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insulated Conductors (AREA)
Description
【発明の詳細な説明】 本発明は高水圧下における水密性と構造の安定性を具備
した光フアイバケーブルに関する。The present invention relates to an optical fiber cable having watertightness and structural stability under high water pressure.
光フアイバケーブルは軽量、細径、かつ低損失などの特
徴を有するために海底ケーブルとしての利用も検討され
ている。このように高水圧条件下における用途に光フア
イバケーブルを適用する場合には、光フアイバの寿命を
保つために光フアイバ心線に外力が加わらないように耐
水圧容器内に収納する必要がある。Since the optical fiber cable has characteristics such as light weight, small diameter, and low loss, its use as a submarine cable is also being considered. When the optical fiber cable is applied for use under high water pressure conditions as described above, it is necessary to store the optical fiber cable in a water pressure resistant container so that an external force is not applied to the optical fiber core wire in order to maintain the life of the optical fiber.
海底ケーブルは数千ｍの深海に布設されることもあり、
その場合には数百kg/cm2の水圧に耐える必要があり、ケ
ーブルの外被は耐水圧容器の機能も具備させるため、そ
の肉厚を相当、厚くしなければならない。例えば外径５
mmの銅管で５００kg/cm2の水圧に耐えるような外被構造
を実現しようとすると、その肉厚を１mm以上に、また外
径１０mmの銅管ではその肉厚を２mm以上にする必要があ
る。Submarine cables may be laid in the deep sea of several thousand meters,
In that case, it is necessary to withstand a water pressure of several hundreds kg / cm 2 , and the cable jacket must be made considerably thicker in order to have the function of a water pressure resistant container. For example, outer diameter 5
In order to realize a jacket structure that can withstand a water pressure of 500 kg / cm 2 with a copper tube of mm, the wall thickness must be 1 mm or more, and with a copper tube of 10 mm outer diameter, the wall thickness must be 2 mm or more. is there.
ところで、このような厚肉の長尺気密管を製造する場
合、気密管の材料にかかわらず技術的に困難を伴なう。By the way, when manufacturing such a thick long airtight tube, it is technically difficult regardless of the material of the airtight tube.
たとえば金属管の場合には溶融押出法あるいはテープ成
形溶接法が代表的製法になるが、いずれにしても気密管
の製造工程で金属を溶融させるための熱が加えられる。
ところが光フアイバ心線に瞬間的にしろ数百℃前後の熱
が加わるとその被覆（ナイロン、ポリエチレン他）が軟
化、溶融し、再固化するときに光フアイバに微小曲がり
が生じて伝送損失が急増するという問題を生じる。For example, in the case of a metal tube, a typical extrusion method is a melt extrusion method or a tape molding welding method, but in any case, heat for melting a metal is applied in the process of producing an airtight tube.
However, when heat of several hundred degrees Centigrade is momentarily applied to the optical fiber core, the coating (nylon, polyethylene, etc.) softens and melts, and when it solidifies again, a slight bend occurs in the optical fiber, causing a rapid increase in transmission loss. The problem of doing.
したがつて、光フアイバケーブルコアの外径より十分大
なる内径の金属管を被覆し、直後に急冷した後、その金
属管を縮径して所定外径に仕上げるなどの工夫が必要に
なるが、金属管が肉厚化するにつれて加熱温度の影響が
大となり、また縮径が困難になつてくる。すなわち金属
管の被覆に要する熱エネルギーは肉厚に比例して増大す
るのでこれを冷却するのに要するエネルギーも増大し、
時間も長くなる。また厚肉管の縮径においては、加工硬
化の度合いが半径方向で著しく異なつてきて外表面がも
ろくなり、機械強度面から厚肉にした効果が半減するこ
とにもなる。Therefore, it is necessary to coat a metal tube with an inner diameter that is sufficiently larger than the outer diameter of the optical fiber cable core, immediately after quenching, and then reduce the diameter of the metal tube to finish it to a specified outer diameter. As the thickness of the metal tube becomes thicker, the effect of the heating temperature becomes greater and the diameter reduction becomes difficult. That is, the thermal energy required to coat the metal tube increases in proportion to the wall thickness, so the energy required to cool it also increases,
It takes longer time. Further, in reducing the diameter of a thick-walled tube, the degree of work hardening significantly differs in the radial direction, and the outer surface becomes brittle, and the effect of making the wall thicker is halved from the viewpoint of mechanical strength.
また気密管が非金属管の場合も、金属管の場合と同じよ
うな問題が生じてくる。この場合は、通常、熱可塑性樹
脂を押出被覆法によつて被覆することになるが、厚肉化
するにつれて内部に残留する歪が大きくなり、したがつ
てこの内部歪が緩和する際に内側の光フアイバケーブル
コアに歪を与えることになり光フアイバ心線の伝送損失
が増大することになる。Also, when the airtight tube is a non-metal tube, the same problem as in the case of the metal tube occurs. In this case, usually, the thermoplastic resin is coated by the extrusion coating method, but as the thickness increases, the strain remaining inside increases, and therefore, when this internal strain relaxes, This will distort the optical fiber cable core and increase the transmission loss of the optical fiber core wire.
本発明はこれらの欠点を解決し、等価的に厚肉の気密管
を被覆した光フアイバケーブルを提供するためのケーブ
ル構造に関する。The present invention relates to a cable structure for solving these drawbacks and providing an optical fiber cable equivalently covering a thick-walled airtight tube.
本発明は、光フアイバ心線を金属製の気密管で被覆した
光フアイバケーブルにおいて、該気密管が外層になるに
したがつて順次厚肉となる２層以上の同心多重管からな
り、且つ各層の該気密管相互間には空隙が設けられ、該
空隙に潤滑剤が充填されてなる光フアイバケーブルに関
する。The present invention relates to an optical fiber cable in which an optical fiber core wire is covered with a metal airtight tube, and the airtight tube is composed of two or more layers of concentric multi-tubes which are successively thicker as an outer layer, and each layer is And an optical fiber cable in which a gap is provided between the airtight tubes and the gap is filled with a lubricant.
本発明における上記潤滑剤として特に好ましくは、植物
性または鉱物性オイル、シリコーン、石油性ジェリーか
ら選ばれるものが挙げられる。Particularly preferable examples of the lubricant in the present invention include those selected from vegetable or mineral oils, silicones, and petroleum jelly.
本発明の光フアイバケーブル構造を第１図で具体的に説
明すると、光フアイバ心線１を介在物２で包囲し、その
外周に多層の薄肉気密管４，５，６，７を最内層の気密
管４から最外層の気密管７に向かつて順次、肉厚が厚く
なるように選び、互いに密接させるが気密管相互の間に
は若干の空隙１０を設けて一体化し、最外層気密管７の
外周に絶縁被覆層８を施した構造である。The optical fiber cable structure of the present invention will be described in detail with reference to FIG. 1. The optical fiber core wire 1 is surrounded by inclusions 2, and a multi-layer thin airtight tube 4, 5, 6, 7 is formed on the outer periphery of the optical fiber core wire 1 as the innermost layer. The airtight tubes 4 are sequentially selected toward the outermost airtight tube 7 so that the wall thickness becomes thicker, and they are brought into close contact with each other, but some air gaps 10 are provided between the airtight tubes to integrate them. This is a structure in which an insulating coating layer 8 is provided on the outer periphery of the.
介在物２はケブラー、ポリエステルなどの固体絶縁物で
も、あるいはジエリーやポリブテンなどの流体でもよ
い。気密管４〜７の材質としてはアルミニウム、銅など
の金属が用いられ、各層について同種のものを用いて
も、異種のものを組み合わせてもよい。各層の気密管を
同一材料とした場合には、その外径と肉厚の比を一定と
すれば、すべて等しい耐圧性を実現でき、アルミニウ
ム、銅等では肉厚／外径＝0.06〜0.10の範囲が通常は採
用される。The inclusion 2 may be a solid insulator such as Kevlar or polyester, or a fluid such as jelly or polybutene. Metals such as aluminum and copper are used as the material of the airtight tubes 4 to 7, and the same kind or different kinds may be used for each layer. When the airtight tubes of each layer are made of the same material, if the ratio of the outer diameter to the wall thickness is made constant, the same pressure resistance can be achieved. For aluminum, copper, etc., the wall thickness / outer diameter = 0.06 to 0.10. Ranges are usually adopted.
また第２図のものは、溝付スペーサ３の溝内に光ファイ
バ心線１を収納し、その外周に第１図の場合と同一の相
互に若干の空隙を設けた多層金属管４，５，６，７と絶
縁被覆層８からなる外被を施したものである。2 shows a multi-layer metal pipe 4, 5 in which the optical fiber core wire 1 is housed in the groove of the grooved spacer 3 and a plurality of mutual gaps are provided on the outer periphery of the optical fiber core wire 1 as in the case of FIG. , 6, 7 and the insulating coating layer 8 are applied.
本発明の光フアイバケーブルは、従来の厚肉の気密管を
より薄肉の同心多重の気密管とし、各層の金属管相互間
に若干の空隙を設け、この空隙に植物性または鉱物性オ
イル、シリコーン、石油性ジエリーなどの潤滑剤を充填
することにより、１層の厚肉管で外被を形成した場合に
比べて、耐水圧性を同一にした上で屈曲特性を大幅に改
善することを可能とした。The optical fiber cable of the present invention uses a conventional thick-walled airtight tube as a thin-walled concentric multiplex airtight tube, and provides some voids between the metal pipes of each layer, and the voids are made of vegetable or mineral oil or silicone. By filling it with a lubricant such as petroleum jelly, it is possible to greatly improve the bending property while making the water pressure resistance the same as compared with the case where the outer cover is formed with a single-layer thick-walled pipe. did.
また本発明では光フアイバ心線を２層以上の気密管で被
覆し、各層の気密管が外層ほどその肉厚が厚肉となつて
いるため、次のような効果も奏する。Further, in the present invention, the optical fiber core wire is covered with the airtight tube of two or more layers, and the airtight tube of each layer is thicker toward the outer layer, so that the following effects are also obtained.
(1)各層の気密管は外径と肉厚の比をおおよそ一定とし
て、各層、ほぼ等しい耐圧性を有することになり、この
ような気密管を多層積層することにより同一肉厚の厚肉
管と同一の耐圧性を実現できる。(1) The airtight tubes of each layer have approximately the same ratio of outer diameter to wall thickness, and each layer has approximately the same pressure resistance.Thick airtight tubes of the same thickness can be obtained by stacking such airtight tubes in multiple layers. The same pressure resistance as can be realized.
(2)製造時には、各層の製造条件のみ考慮すればよく、
加熱の影響が小で、かつ縮径の加工度も小さくできるの
で、均一な特性の外被が得られ、かつ光フアイバ心線へ
の影響も無視できる。(2) At the time of manufacturing, it suffices to consider only the manufacturing conditions for each layer,
Since the influence of heating is small and the workability of diameter reduction can be reduced, a jacket with uniform characteristics can be obtained and the influence on the optical fiber core wire can be ignored.
本発明の光フアイバケーブル構造の実施態様として、第
３図、第４図のようなものが挙げられる。Examples of embodiments of the optical fiber cable structure of the present invention include those shown in FIGS. 3 and 4.
第３図は、溝付スペーサ３の溝内に光フアイバ心線１を
収納し、その外周に第１層目の金属管４、第２層目の金
属管５、第３層目の金属管６を、外周にそれぞれ絶縁層
８−１，８−２，８−３を配して一体化被覆し、金属管
層４，５，６は順次、厚肉となつてゆく。このとき絶縁
層としては熱可塑性樹脂等の非金属の0.3〜3mm程度の一
程の厚さのものが用いられる。第３図の構造では各層の
金属管が非金属絶縁層および潤滑剤を充填した層で離隔
されているので非金属層のクツシヨン効果により内層に
加わる外圧が均一化され、また耐電食性、耐腐食性の点
でも効果がある。絶縁層は塗布、スプレー等により金属
管上に設けることができる。FIG. 3 shows that the optical fiber core wire 1 is housed in the groove of the grooved spacer 3, and the first layer metal tube 4, the second layer metal tube 5 and the third layer metal tube are provided on the outer periphery thereof. 6, the insulating layers 8-1, 8-2 and 8-3 are respectively arranged on the outer circumferences to integrally cover the metal tube layers 4 and 5, and the metal tube layers 4, 5 and 6 are successively thickened. At this time, as the insulating layer, a nonmetal such as a thermoplastic resin having a thickness of about 0.3 to 3 mm is used. In the structure of FIG. 3, since the metal pipes of each layer are separated by the non-metal insulating layer and the layer filled with the lubricant, the cushioning effect of the non-metal layer makes the external pressure applied to the inner layer uniform, and also the corrosion resistance and the corrosion resistance are improved. Also effective in terms of sex. The insulating layer can be provided on the metal tube by coating, spraying or the like.
第４図は第２図と同様の構造の多層金属管４，５，６，
７と絶縁被覆層８からなる外被の金属管をテープ溶接法
にて形成し、少なくとも隣接する２層の金属管の溶接面
が同一円周上に一致しないようにしたもので、第４図で
は全ての溶接面が一致しないようになつている。FIG. 4 shows a multi-layered metal tube 4, 5, 6, which has the same structure as in FIG.
4 is a metal pipe of a jacket made of 7 and an insulating coating layer 8 formed by a tape welding method so that the welding surfaces of at least two adjacent metal pipes do not coincide on the same circumference. All of the welded surfaces do not match.
第４図の構成を採ることにより、各金属管の不均一部分
（溶接部）が円周方向および半径方向に分布され、ケー
ブル全体の耐水圧性、屈曲性などを厚肉金属管と同程度
まで改善することができる。By adopting the configuration shown in Fig. 4, the non-uniform parts (welded parts) of each metal pipe are distributed in the circumferential direction and the radial direction, and the water pressure resistance and flexibility of the entire cable are as high as those of the thick metal pipe. Can be improved.
また第２〜４図の構造では、光フアイバ心線が溝付スペ
ーサの溝内に収納されているのでスペーサの補強効果も
加わつて耐水圧性を更に改善でき、溝内にジエリーなど
の防水コンパウンドを充填することにより浸水時の水走
りを防止でき、障害時の部分的修理が可能になる。Also, in the structure shown in FIGS. 2 to 4, since the optical fiber core wire is stored in the groove of the grooved spacer, the reinforcing effect of the spacer can be added to further improve the water pressure resistance, and a waterproof compound such as jelly can be provided in the groove. By filling it, it is possible to prevent water running during flooding, and it is possible to partially repair it in the event of a failure.
各層の気密管を異種材料で構成し、外層ほど硬質材料に
して肉厚の軽減化をはかつたり、逆に外層ほど軟質材料
にしてケーブル径を大にして低比重化をはかるなども可
能であり、この例として内層から順にアルミニウム、
銅、からなるもの等が挙げられる。上記の場合、第３図
の構造と同様絶縁上の効果も奏されるものである。It is also possible to configure the airtight tube of each layer with different materials and make the outer layer a hard material to reduce the wall thickness, or conversely, make the outer layer a soft material to increase the cable diameter and reduce the specific gravity. There is aluminum in this order from the inner layer,
Copper, etc. may be mentioned. In the above case, the same insulating effect is obtained as in the structure shown in FIG.
なお上記構造の外被上に更に鉄あるいはケブラーなどか
らなる外装を施してよいのはもちろんである。It goes without saying that the outer cover made of iron or Kevlar may be further provided on the outer cover of the above structure.
本発明の２層以上の同心多重金属管で被覆された光フア
イバケーブルの製造にあたつては、光フアイバケーブル
コアの外周を、光フアイバケーブルコアの外径より十分
大なる肉径をもつ第１層の気密管で被覆し、この第１層
の管が光フアイバケーブルコアの外径よりわずかに大な
る肉径まで１次縮径し、次いでその外側に第２層の気密
管を同様に形成してその１次縮径を行なうと同時に第１
層の２次縮径を行ない、これを順次くり返して密接多重
管を形成する方法が採られる。縮径はダイス引きにより
行なわれる。In the production of an optical fiber cable coated with two or more layers of concentric multiple metal tubes of the present invention, the outer circumference of the optical fiber cable core has a wall thickness sufficiently larger than the outer diameter of the optical fiber cable core. One layer of airtight tube is coated, and the first layer of tube is reduced in diameter to a wall diameter slightly larger than the outer diameter of the optical fiber cable core, and then the second layer of airtight tube is also outside of it. At the same time it is formed and its primary diameter is reduced
A method is adopted in which the secondary diameter reduction of the layers is performed and this is repeated sequentially to form a close multi-tube. The diameter reduction is performed by die drawing.
第５図に、上記の本発明方法における各工程に沿ったケ
ーブル断面構造を示す。気密管として溶接アルミニウム
管を用い、外径３mmのスペーサを被覆した場合を例にと
つて説明する。第５図（ａ）は光フアイバ心線を収納し
たスペーサ３の外周にアルミニウム管４を被覆した状態
の光フアイバケーブルの断面を示しており、アルミニウ
ム管４は溶接部９−１を有し、またその内径はスペーサ
３の外径に比べて十分、大となるように、内径を４mm、
肉厚を0.4mm、外径4.8mm程度に選んである。FIG. 5 shows a cable cross-sectional structure along each step in the method of the present invention. A case where a welded aluminum tube is used as an airtight tube and a spacer having an outer diameter of 3 mm is coated will be described as an example. FIG. 5 (a) shows a cross section of the optical fiber cable in which the outer circumference of the spacer 3 accommodating the optical fiber core wire is covered with the aluminum tube 4, and the aluminum tube 4 has the welded portion 9-1. In addition, the inner diameter is 4 mm so that it is sufficiently larger than the outer diameter of the spacer 3.
The wall thickness is 0.4mm and the outer diameter is 4.8mm.
第５図（ｂ）は上記のアルミニウム管４を内部のスペー
サ３の外径より若干大きい内径3.7mmとなるように縮径
し、アルミニウム管４の外径を4.5mm程度に均一化し、
特に溶接部９−１の外表面を平滑にした状態を示す。In FIG. 5 (b), the aluminum tube 4 is reduced in diameter to an inner diameter of 3.7 mm, which is slightly larger than the outer diameter of the inner spacer 3, and the outer diameter of the aluminum tube 4 is made uniform to about 4.5 mm.
Particularly, it shows a state in which the outer surface of the welded portion 9-1 is made smooth.
第５図（ｃ）は（ｂ）の状態のアルミニウム管４を外径
3.8mmに縮径後、その外周にその外径より十分大なる内
径4.5mm、肉厚0.5mm、外径5.5mmの溶接金属管（アルミ
ニウム）５をその溶接部９−２が金属管の溶接部９−１
と円周上で一致しないような配置で被覆した状態を示
す。空隙部１０に潤滑剤を充填する。FIG. 5 (c) shows the outer diameter of the aluminum pipe 4 in the state of (b).
After reducing the diameter to 3.8 mm, a welded metal pipe (aluminum) 5 having an inner diameter of 4.5 mm, a wall thickness of 0.5 mm, and an outer diameter of 5.5 mm, which is sufficiently larger than the outer diameter, is welded to the outer periphery of the welded portion 9-2. Part 9-1
Shows a state in which they are covered with an arrangement such that they do not match on the circumference. The space 10 is filled with a lubricant.
第５図（ｄ）は金属管５を縮径しその外径を4.8mmに均
一化すると共に、同時に金属管４も縮径し、スペーサ３
と金属管４、金属管４と金属管５を潤滑剤１０−１を介
して互いに密接させた状態を示している。In FIG. 5 (d), the metal tube 5 is reduced in diameter so that its outer diameter is made uniform to 4.8 mm, and at the same time, the metal tube 4 is also reduced in diameter and the spacer 3
And the metal pipe 4, and the metal pipe 4 and the metal pipe 5 are shown in a state of being brought into close contact with each other via the lubricant 10-1.
第５図（ｅ）は金属管５の外周にその外径より十分、大
なる内径5.9mm、肉厚0.55mm、外径7.0mmの溶接金属管６
を、その溶接部９−３が溶接部９−１および９−２と円
周上で一致しないような配置で被覆した状態を示す。FIG. 5 (e) shows a welded metal pipe 6 having an inner diameter of 5.9 mm, a wall thickness of 0.55 mm, and an outer diameter of 7.0 mm, which is sufficiently larger than the outer diameter of the outer circumference of the metal pipe 5.
Shows a state in which the welded portion 9-3 is covered with an arrangement such that the welded portion 9-3 does not coincide with the welded portions 9-1 and 9-2 on the circumference.
第５図（ｆ）は金属管６を縮径しその外径を6.5mmで均
一化した状態を示し、空隙部１０には潤滑剤１０−２が
充填される。FIG. 5 (f) shows a state in which the diameter of the metal tube 6 is reduced and the outer diameter is made uniform to 6.5 mm, and the space 10 is filled with the lubricant 10-2.
第５図（ｇ）は金属管６を更に縮径して外径5.9mmと
し、金属管５と金属管６を潤滑剤を介して密接させた状
態を示す。この場合、金属管４，５，６が全て縮径され
るように金属管６の縮径率を選定してもよい。FIG. 5 (g) shows a state in which the metal pipe 6 is further reduced in diameter to an outer diameter of 5.9 mm and the metal pipe 5 and the metal pipe 6 are brought into close contact with each other via a lubricant. In this case, the diameter reduction ratio of the metal tube 6 may be selected so that the metal tubes 4, 5, 6 are all reduced in diameter.
このように同心多重管で被覆された光フアイバケーブル
を製造することにより次のような効果が奏せられる。By producing the optical fiber cable covered with the concentric multiple tubes in this way, the following effects can be obtained.
(1)多層の薄肉管を縮径しながら密接一体化してケーブ
ル外被を形成しているので、半径方向円周方向で外被の
物性値が均一化され、機械強度が一層の厚肉管の場合と
同等以上のものを実現できる。(1) Since the cable jacket is formed by closely integrating the multi-layered thin-walled tubes while reducing the diameter, the physical properties of the jacket are made uniform in the radial circumferential direction and the mechanical strength is further increased. More than or equal to the case can be realized.
(2)１層の気密管では製造が困難な厚肉外被でも容易に
製造でき、内部の光ファイバケーブルに悪影響を与えな
い。(2) Even a thick-walled jacket, which is difficult to manufacture with a single-layer airtight tube, can be easily manufactured without adversely affecting the optical fiber cable inside.
(3)気密管が溶接金属管の場合には溶接部の凹凸を１次
縮径で平滑化した後、その外層の金属管の１次縮径工程
で外層金属管の溶接部の凹凸を平滑化すると同時に内層
金属管に密接させるので縮径をスムーズかつ均一に行え
る。(3) If the airtight pipe is a welded metal pipe, the unevenness of the welded part is smoothed by the primary reduction, and then the unevenness of the welded part of the outer metal pipe is smoothed in the primary reduction process of the outer layer metal pipe. At the same time, it is brought into close contact with the inner layer metal pipe, so that the diameter can be reduced smoothly and uniformly.
第１〜４図は本発明の光フアイバケーブルの構造を示す
断面図であり、第５図は本発明の光フアイバケーブルの
製造方法を示す工程図である。1 to 4 are sectional views showing the structure of the optical fiber cable of the present invention, and FIG. 5 is a process drawing showing the method for manufacturing the optical fiber cable of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 斎藤 泰紀 神奈川県横浜市戸塚区田谷町１番地 住友 電気工業株式会社横浜製作所内 (56)参考文献 特開 昭54−134449（ＪＰ，Ａ) 特開 昭54−145151（ＪＰ，Ａ) 特開 昭52−60639（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Saito 1 Taya-cho, Totsuka-ku, Yokohama-shi, Kanagawa Sumitomo Electric Industries, Ltd. Yokohama Works (56) Reference JP-A-54-134449 (JP, A) JP 54-145151 (JP, A) JP-A-52-60639 (JP, A)
Claims (3)
た光フアイバケーブルにおいて、該気密管が外層になる
にしたがつて順次厚肉となる２層以上の同心多重管から
なり、且つ各層の該気密管相互間には空隙が設けられ、
該空隙に潤滑剤が充填されてなる光フアイバケーブル。1. An optical fiber cable in which an optical fiber core wire is covered with a metal airtight tube, and the airtight tube is composed of two or more layers of concentric multiple tubes which are successively thicker as an outer layer, and A space is provided between the airtight tubes of each layer,
An optical fiber cable in which the gap is filled with a lubricant.
シリコーン、石油性ジェリーから選ばれるものである、
特許請求の範囲１記載の光フアイバケーブル。2. The lubricant is a vegetable or mineral oil,
Selected from silicone and petroleum jelly,
The optical fiber cable according to claim 1.
許請求の範囲１記載の光フアイバケーブル。3. The optical fiber cable according to claim 1, wherein the multi-layer airtight tube is made of different materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57037208A JPH0656448B2 (en) | 1982-03-11 | 1982-03-11 | Optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57037208A JPH0656448B2 (en) | 1982-03-11 | 1982-03-11 | Optical fiber cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5940604A JPS5940604A (en) | 1984-03-06 |
| JPH0656448B2 true JPH0656448B2 (en) | 1994-07-27 |
Family
ID=12491165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57037208A Expired - Lifetime JPH0656448B2 (en) | 1982-03-11 | 1982-03-11 | Optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0656448B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4141091A1 (en) * | 1991-12-13 | 1993-06-17 | Kabelmetal Electro Gmbh | METHOD FOR PRODUCING AN OPTICAL WAVE CABLE ELEMENT |
| JP2970456B2 (en) * | 1995-02-14 | 1999-11-02 | 日本鋼管株式会社 | Manufacturing method and manufacturing apparatus for metal tube coated optical fiber cable |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2551211B2 (en) * | 1975-11-12 | 1977-12-29 | Siemens AG, 1000 Berlin und 8000 München | OPTICAL CABLE WITH MULTI-LAYER PLASTIC COAT |
| JPS54134449A (en) * | 1978-04-11 | 1979-10-18 | Kokusai Denshin Denwa Co Ltd | Photoofiber submarine cable |
| JPS54145151A (en) * | 1978-05-02 | 1979-11-13 | Kokusai Denshin Denwa Co Ltd | Submarine cable of optical fibers |
-
1982
- 1982-03-11 JP JP57037208A patent/JPH0656448B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5940604A (en) | 1984-03-06 |
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