JPH02125214A - Optical fiber cord - Google Patents
Optical fiber cordInfo
- Publication number
- JPH02125214A JPH02125214A JP63277494A JP27749488A JPH02125214A JP H02125214 A JPH02125214 A JP H02125214A JP 63277494 A JP63277494 A JP 63277494A JP 27749488 A JP27749488 A JP 27749488A JP H02125214 A JPH02125214 A JP H02125214A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- optical fiber
- fiber cord
- jacket
- cord
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 38
- 238000005452 bending Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 9
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 3
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920001634 Copolyester Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229920006038 crystalline resin Polymers 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920006127 amorphous resin Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は例えば局＠闇或いは４内で装四間、機鼎間配線
に使用される光ファイバコードに圓する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applicable to optical fiber cords used, for example, for wiring between stations and machines in a central office or four offices.
（従来の技術）
一般に、光ファイバは側圧を受けると、マイクロベンド
と呼ばれる微小な曲がりを生じ、その結果、光がファイ
バの外に逃げ出して損失が増加する。そこで、九ファイ
バに側圧が加わらないようにコードの構造を設計すると
ともに、仮に側圧が加わっても損失が増加しないように
ファイバのパラメータ（コア径、屈折率等）を適切に選
択する必要がある。また、布設時等にファイバが破所し
ないように伸びを極力抑えて内部のファイバに加わる張
力を小さく抑える必要があるため抗張力体を設けている
。(Prior Art) Generally, when an optical fiber is subjected to lateral pressure, a minute bend called a microbend occurs, and as a result, light escapes from the fiber and increases loss. Therefore, it is necessary to design the cord structure so that lateral pressure is not applied to the nine-fiber, and to appropriately select fiber parameters (core diameter, refractive index, etc.) so that even if lateral pressure is applied, the loss does not increase. . In addition, a tensile strength member is provided because it is necessary to suppress elongation as much as possible so that the fiber does not break during installation, and to keep the tension applied to the internal fiber to a minimum.
ところで、従来の光フ′アイバコードは第３図に示すよ
うに、光ファイバ心１１０１の外周上に抗張力体である
ア゛ラミド繊維等からなる１ｉ函層１０２が設けられ、
ざらにその十にポリ塩化ビニル（ＰＶＣ）等の熱可塑性
樹脂からなる外被１０３が被覆されたものである。By the way, as shown in FIG. 3, in the conventional optical fiber cord, a 1i box layer 102 made of aramid fiber or the like, which is a tensile strength material, is provided on the outer periphery of an optical fiber core 1101.
Roughly, the outer cover 103 is made of a thermoplastic resin such as polyvinyl chloride (PVC).
しかしながら、上記従来の光ファイバコードは構造上及
び材質、Ｆ剛性が低いため外力によりコードが容易に曲
がってしまい、これにより光がコードの外に逃げ出して
航失が増加し、光信号の瞬断を生じさせてしまうという
問題点があった。However, due to the structure, materials, and low rigidity of the conventional optical fiber cords, the cords are easily bent by external forces, which causes light to escape outside the cords, increasing loss of light, and causing instantaneous interruptions in optical signals. There was a problem in that it caused
そこで、本発明は斯かる従来例の問題点を解決するため
になされたもので、その目的とするところは、コード取
扱い時の光信１（の瞬断を防止寸べく、その曲げ剛性を
向上させた尤ファイバコードを提供づることにある。Therefore, the present invention was made to solve the problems of the conventional example, and its purpose is to improve the bending rigidity of the optical signal 1 in order to prevent instantaneous interruption of the optical signal 1 when handling the cord. The purpose is to provide a unique fiber cord.
上記の目的を達成するために、本発明にあっては、光フ
ァイバ心線の外周上に抗張力体からなるｔｊｉ ｔｊｉ
層を設け、この緩衝層の外周に樹脂外被を被覆した光フ
ァイバコードにおいて、前記樹脂外被を２層構造となし
、この外被の内層を曲げ弾＋ｔ１率５０〜５００に！Ｉ
／ｃＩｉの樹脂としたことを特徴とする。In order to achieve the above object, the present invention provides a tensile strength member on the outer periphery of the optical fiber.
In an optical fiber cord in which a layer is provided and a resin jacket is coated on the outer periphery of the buffer layer, the resin jacket has a two-layer structure, and the inner layer of the jacket has a bending elasticity +t1 ratio of 50 to 500! I
/cIi resin.
（作用）
上記の構成を有する本発明に４３いては、緩衝層の外周
に被覆する樹脂外被を２層構造となし、この外被の内層
を曲げ弾性率５０〜５００ Ｋｇ／ ｃｄの樹脂とした
ことによって、剛性を向上させ取扱い時の光信号の瞬断
を防止した。(Function) According to the present invention having the above configuration, the resin jacket covering the outer periphery of the buffer layer has a two-layer structure, and the inner layer of this jacket is made of a resin having a bending elastic modulus of 50 to 500 Kg/cd. This improved rigidity and prevented momentary interruption of optical signals during handling.
以下に本発明を図示の実施例に基づいて説明する。第１
図は本発明に係る光ファイバコードの第１実施例を示し
、同図は単心光ファイバコードを示している。光ファイ
バ」−ド１は尤ファイバ心線２を有し、この心線２は光
ファイバにプラスチックの１次被覆及び必要に応じ【緩
ｍｉが設けられたものを光ファイバ素線とし、この素線
にさらにプラスブーツクの２次被覆を施した構ｊ告であ
る。The present invention will be explained below based on illustrated embodiments. 1st
The figure shows a first embodiment of the optical fiber cord according to the present invention, and the same figure shows a single-core optical fiber cord. The optical fiber card 1 has a fiber core 2, and this core 2 is an optical fiber with a primary coating of plastic and a slack layer provided as necessary. This is a design in which the wire is further coated with a secondary coating of plus boot stock.
この光ファイバ心線２の外周上にはアラミド繊組からな
る抗張力体が巻回されて緩衝層が３が形成される。また
、緩ｉ！ｉ層３の外周には高弾性率樹脂からなる内層用
樹脂４とポリ塩化ビニル（ＰＶＣ）等の熱可塑性樹脂５
との２層構造の樹脂外被が被覆されている。そして、内
層用樹脂４としてはその曲げ弾性率が５０〜５００に９
／ｃｉ程度の樹脂を使用することにより、光ファイバコ
ード１の剛性を向上さけ゛、取扱い時の光信号の瞬断を
防＋１−．することができる。ここで、内層用ａ４１Ｊ
ｆｉ４の曲げ弾性率が５０８９／ｃｔｄ未満であると、
所望の剛性を得ることができず、他方曲げ弾性率が５０
０句／ｉと超える値では、光ファイバコード１が木来備
えていなければならない可撓性を損なってしまうことに
なる。さらに、内層用樹脂４の例としてｌよナイロン、
ポリカーボネート、ポリエチレン、ポリブチレンテレフ
タレート等が挙げられる。A tensile strength member made of aramid fibers is wound around the outer periphery of the optical fiber core 2 to form a buffer layer 3. Also, loose i! The outer periphery of the i-layer 3 is coated with an inner layer resin 4 made of a high modulus resin and a thermoplastic resin 5 such as polyvinyl chloride (PVC).
It is covered with a two-layer resin jacket. The resin 4 for the inner layer has a flexural modulus of 9 to 50 to 500.
By using a resin of about /ci, the rigidity of the optical fiber cord 1 is improved and the momentary interruption of the optical signal during handling is prevented +1-. can do. Here, a41J for inner layer
The bending elastic modulus of fi4 is less than 5089/ctd,
The desired stiffness could not be obtained, and the flexural modulus was 50.
If the value exceeds 0/i, the flexibility that the optical fiber cord 1 must have will be lost. Furthermore, as an example of the resin 4 for the inner layer, nylon,
Examples include polycarbonate, polyethylene, polybutylene terephthalate, and the like.
ところで、光ファイバコード１を上記のようなａ造とす
ることにより、コードの剛性を向上させることが可能で
あるが、反面低温特性を劣化させる原因ともなる。因み
に、これは低温によってコード１中の光ファイバが座屈
するためと考えられる。これを解決するための第１の手
段としては内層用樹！１１４を選択したり、第２の手段
としてＭＡ脂の収縮を抑える骨材を入れることが行なわ
れる。By the way, by forming the optical fiber cord 1 into the above-mentioned A structure, it is possible to improve the rigidity of the cord, but on the other hand, it also causes deterioration of low temperature characteristics. Incidentally, this is considered to be because the optical fiber in the cord 1 buckles due to the low temperature. The first way to solve this problem is to use an inner layer tree! 114 or, as a second means, inserting aggregate to suppress the shrinkage of MA fat.
即ち、内層用ＭｔＩ脂４としては、結晶性の樹脂を避け
、例えばポリカーボネート、非結晶ナイロン等の非結晶
樹脂を選択使用して結晶化の進行による樹脂の収縮を防
止したり、またガラス１１Ｈにて強化された低線膨張係
数を有する樹脂を使用したり、さらに液晶コポリエステ
ル（ＬＣＰ）等の樹脂自体の弾性率が大で、低線膨張係
数を有する材料を使用することが挙げられる。このよう
に、内層用樹脂４として非結晶樹脂、液晶コポリエステ
ル（ｌ ＣＰ ）又はガラス繊維強化ＭＡ脂を使用でる
ことにより、］−ドの曲げ剛性を＾めることは勿論のこ
と、低温特性をも改善することができる。That is, as the MtI resin 4 for the inner layer, avoid crystalline resins and select non-crystalline resins such as polycarbonate and non-crystalline nylon to prevent shrinkage of the resin due to progress of crystallization. Examples include using a resin that has been reinforced with a low linear expansion coefficient, and using a material such as liquid crystal copolyester (LCP) that has a high elastic modulus and has a low linear expansion coefficient. In this way, by using an amorphous resin, liquid crystal copolyester (l CP ), or glass fiber reinforced MA resin as the inner layer resin 4, it is possible to not only increase the bending rigidity of the []-do but also improve the low-temperature properties. can also be improved.
第２図は本発明の第２実施例を示しでおり、前記第１実
施例と同一の部分には同一の符号を付して説明すると、
本実施例では低温によってコード中の光ファイバが座屈
するのを防止するために、樹脂の収縮を抑える骨材を入
れでいる。即ち、第２図に示すように、高弾性率樹脂か
らなる内層用樹脂４の周囲に剛性が高く且つ線膨張係数
が小さい高弾性率線状物６を１本以上（本実施例では２
木）縦添えし又は撚り込み難燃性のポリ塩化ビニル（Ｐ
ＶＣ）からなる熱可塑性樹脂５を被覆した構造としてい
る。ここで、高弾性率線状物６とし−Ｃは鋼線、ファイ
バ強化プラスチック（ＦＲＰ）、ピアノ線等が使用され
る。尚、本実施例では高弾性４Ｉ−線状物６を内層用樹
脂４の外周上に縦添え又は撚り込んだが、これに限らず
例えば内層用樹脂４の内側或いは熱１■塑性樹脂５の外
周、叩ら樹脂外被の内側或いは外側に縦添え又は撚り込
んでもよい。FIG. 2 shows a second embodiment of the present invention, and the same parts as in the first embodiment are given the same reference numerals and will be explained as follows.
In this embodiment, in order to prevent the optical fibers in the cord from buckling due to low temperatures, aggregate is added to suppress the shrinkage of the resin. That is, as shown in FIG. 2, one or more (in this example, two) high elastic modulus linear objects 6 having high rigidity and a small coefficient of linear expansion are placed around the inner layer resin 4 made of a high elastic modulus resin.
wood) vertically spliced or twisted flame-retardant polyvinyl chloride (P
It has a structure coated with a thermoplastic resin 5 made of VC). Here, as the high elastic modulus linear material 6 -C, steel wire, fiber reinforced plastic (FRP), piano wire, etc. are used. In this embodiment, the highly elastic 4I-linear material 6 was vertically attached or twisted on the outer periphery of the inner layer resin 4, but the present invention is not limited to this. It may also be vertically attached or twisted on the inside or outside of the beaten resin jacket.
−Ｌ述のように、本第２実施例によれば樹脂外被の内、
中、外側のいずれかの側に＾弾ゼ１、低線膨張係数の線
状物を縦添え又は撚り込むことにより、外被の内層用樹
脂４に高弾性率の樹脂を用いた場合でも低温特性を良好
にすることができる。-L As mentioned above, according to the second embodiment, inside the resin jacket,
By vertically attaching or twisting a linear material with a low coefficient of linear expansion on either the inside or outside side, low temperature can be achieved even when a resin with a high elastic modulus is used as the resin 4 for the inner layer of the outer cover. Characteristics can be improved.
以上説明したように、本発明によれば、樹脂外波を２層
憫造となし、この外被の内層を曲げ弾性率５０〜５００
Ｋ９ ／−の樹脂としたので５．優れた可撓性を保持
しつつ、コードの曲げ剛性を高め、取扱い時の光信号の
瞬断を防止することができる。As explained above, according to the present invention, the resin outer wave is made of two layers, and the inner layer of this outer cover has a bending elastic modulus of 50 to 500.
5. Since the resin was K9/-. It is possible to increase the bending rigidity of the cord while maintaining excellent flexibility, and prevent momentary interruption of the optical signal during handling.
その結果、伝送特性、機械特性、信頼性を大幅に向上さ
せることができるという効果を秦”する。As a result, transmission characteristics, mechanical characteristics, and reliability can be significantly improved.
第１図は本発明に係る光ファイバコードの第１実施例を
示す概略断面図、第２図は本発明に係る光ファイバコー
ドの第２実施例を示す概略断面図、第３図は従来の光フ
ァイバコードの一例を丞す概略断面図である。
１・・・光ファイバコード、２・・・光ファイバ心線、
３・・・緩衝層、４・・・内層用樹脂、５・・・熱Ｉ′
ｉＴ塑竹法１脂、６・・・高弾性率線状物。FIG. 1 is a schematic cross-sectional view showing a first embodiment of an optical fiber cord according to the present invention, FIG. 2 is a schematic cross-sectional view showing a second embodiment of an optical fiber cord according to the present invention, and FIG. FIG. 1 is a schematic cross-sectional view of an example of an optical fiber cord. 1... Optical fiber cord, 2... Optical fiber core wire,
3... Buffer layer, 4... Resin for inner layer, 5... Heat I'
iT plastic bamboo method 1 fat, 6...high elastic modulus linear material.
Claims (1)
を設け、この緩衝層の外周に樹脂外被を被覆した光ファ
イバコードにおいて、前記樹脂外被を２層構造となし、
この外被の内層を曲げ弾性率５０〜５００ｋｇ／ｃｍ＾
２の樹脂としたことを特徴とする光ファイバコード。 ２、前記樹脂外被には、鋼線、ファイバ強化プラスチッ
ク、ピアノ線等の剛性が高く且つ線膨張係数の小さい線
状物を縦添え又は撚り込んでなる請求項１記載の光ファ
イバコード。[Claims] 1. An optical fiber cord in which a buffer layer made of a tensile strength material is provided on the outer periphery of an optical fiber core, and a resin jacket is coated on the outer periphery of the buffer layer, wherein the resin jacket has a two-layer structure. Tonashi,
The inner layer of this outer cover has a bending modulus of elasticity of 50 to 500 kg/cm^
2. An optical fiber cord characterized by being made of resin. 2. The optical fiber cord according to claim 1, wherein a linear material having high rigidity and a small coefficient of linear expansion, such as steel wire, fiber-reinforced plastic, or piano wire, is vertically attached or twisted into the resin jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63277494A JPH02125214A (en) | 1988-11-04 | 1988-11-04 | Optical fiber cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63277494A JPH02125214A (en) | 1988-11-04 | 1988-11-04 | Optical fiber cord |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02125214A true JPH02125214A (en) | 1990-05-14 |
Family
ID=17584382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63277494A Pending JPH02125214A (en) | 1988-11-04 | 1988-11-04 | Optical fiber cord |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02125214A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009090451A (en) * | 2007-10-05 | 2009-04-30 | Samsung Electronics Co Ltd | Compliant joint |
| JP2019184596A (en) * | 2018-03-30 | 2019-10-24 | 宇部エクシモ株式会社 | Distortion detecting optical fiber cable |
-
1988
- 1988-11-04 JP JP63277494A patent/JPH02125214A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009090451A (en) * | 2007-10-05 | 2009-04-30 | Samsung Electronics Co Ltd | Compliant joint |
| US8021071B2 (en) | 2007-10-05 | 2011-09-20 | Samsung Electronics Co., Ltd. | Compliant joint |
| JP2019184596A (en) * | 2018-03-30 | 2019-10-24 | 宇部エクシモ株式会社 | Distortion detecting optical fiber cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1224496B1 (en) | Fiber optic drop cable | |
| US6389204B1 (en) | Fiber optic cables with strength members and methods of making the same | |
| US5627932A (en) | Reduced diameter indoor fiber optic cable | |
| US6259844B1 (en) | Strengthened fiber optic cable | |
| US4836639A (en) | Optical fiber cable having a neutral axis defining a zero stress | |
| US6167180A (en) | Cable having at least one layer of flexible strength members with adhesive and non-adhesive yarns for coupling an outer protective jacket and a buffer tube containing optical fibers | |
| US4534618A (en) | Optical communication cable | |
| JP3309993B2 (en) | Telecommunication cable | |
| JPS6011323B2 (en) | optical fiber | |
| US6553167B2 (en) | Fiber optic cables having ultra-low shrinking filaments and methods of making the same | |
| US6993227B2 (en) | Fiber optic cable | |
| JP2877719B2 (en) | Flexible dielectric fiber optic cable | |
| JPH085878A (en) | Optical cable having u-shaped carrier whose crushing performance is improved | |
| JPH02125214A (en) | Optical fiber cord | |
| JPH10148737A (en) | Aerial outdoor optical cable | |
| JPS60156025A (en) | Optical fiber cable | |
| JP2001350069A (en) | Optical fiber cable | |
| JP7135744B2 (en) | fiber optic cable | |
| JP2005037641A (en) | Optical fiber cable | |
| JPH11174286A (en) | Optical fiber cord | |
| JPS6028611A (en) | Optical fiber core provided with tension wire and optical fiber cable using said core | |
| JP2004212960A (en) | Optical fiber cable | |
| JPS61230108A (en) | Plastic optical fiber cable | |
| JPH11311729A (en) | Optical fiber cable | |
| JPH0660808U (en) | Layered fiber optic cable |