JPH01257806A - Separation type optical fiber unit - Google Patents
Separation type optical fiber unitInfo
- Publication number
- JPH01257806A JPH01257806A JP63038933A JP3893388A JPH01257806A JP H01257806 A JPH01257806 A JP H01257806A JP 63038933 A JP63038933 A JP 63038933A JP 3893388 A JP3893388 A JP 3893388A JP H01257806 A JPH01257806 A JP H01257806A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- optical fibers
- fiber unit
- optical
- fibers
- 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 60
- 238000000926 separation method Methods 0.000 title 1
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 239000000835 fiber Substances 0.000 abstract description 8
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 229920000271 Kevlar® Polymers 0.000 abstract description 2
- 239000004761 kevlar Substances 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process 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
- G02B6/4431—Protective covering with provision in the protective covering, e.g. weak line, for gaining access to one or more fibres, e.g. for branching or tapping
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光ケーブルに収納する光ファイバユニットに関
し、とくに光加入者系の伝送路に使用する分離形の２心
光ファイバユニツトに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical fiber unit housed in an optical cable, and more particularly to a separate type twin-core optical fiber unit used in a transmission line of an optical subscriber system.
第２図に従来のこの種の２心光ファイバユニツトの一例
の断面構造を示す。２本の光ファイバ心線１を平行に配
置し、樹脂により二次被覆４を一括して施し一体化した
構造を備えている。FIG. 2 shows a cross-sectional structure of an example of a conventional twin-core optical fiber unit of this type. It has an integrated structure in which two optical fiber cores 1 are arranged in parallel and are collectively coated with a secondary coating 4 of resin.
加入者系の光ケーブル網が拡大するに伴ない、単心乃至
２６単位で加入者に光ケーブルに収納されている光ファ
イバ心線を分岐する必要性が生してきた。As subscriber optical cable networks have expanded, it has become necessary to branch optical fibers housed in optical cables to subscribers in units of 1 to 26 fibers.
一方加入者系の光ケーブルは数十乃至数百の光ファイバ
心線を内蔵収納しており高密度性には優れた構成となっ
ているが、加入者系の２心光ファイバユニツトとしては
第２図に例示したような断面構造であり、通常径２５０
μｍφの光ファイバ心線を使用する場合、２心光ファイ
バユニツトの寸法は０．４ｍｍｘ０．７ｍｍ程度の細小
なものであり、光ファイバ心線に損傷を与えることなく
二次被覆を除去して光ファイバ心線を単心ずつ分離分岐
するのに非常に細かい作業を要し、作業性において問題
がある。On the other hand, subscriber system optical cables contain tens to hundreds of optical fibers and have an excellent high-density structure, but as subscriber system dual-core optical fiber units, they are the second It has a cross-sectional structure as shown in the figure, and has a normal diameter of 250 mm.
When using a μmφ optical fiber, the dimensions of the twin-core optical fiber unit are as small as 0.4 mm x 0.7 mm, and the secondary coating can be removed without damaging the optical fiber. Separating and branching the fiber cores one by one requires very detailed work, which poses a problem in workability.
本発明は従来の問題を解決し、とくに２６単位の光ファ
イバユニットとじて途中分岐の際の取扱い性を容易かつ
安定に行うことのできる分離形光ファイバユニットを提
供することを目的とするものである。SUMMARY OF THE INVENTION The object of the present invention is to solve the conventional problems and provide a separate optical fiber unit that can be easily and stably handled when branching in the middle of a 26-unit optical fiber unit. be.
本発明は上記の目的を達成するため、２本の光ファイバ
心線を互いに平行に配列し、一括して二次被覆を施し一
体化した光ファイバユニットにおいて、平行に配列した
２本の光ファイバ心線の外周面の包絡線と前記２本の光
ファイバ心線外周面との間に形成される空隙部分に、光
ファイバ心線の配列に沿ってたるみを有した引裂き紐を
挿入配置し、２本の光ファイバ素線および引裂き紐を、
前記引裂き紐のたるめの部分を外部に露出する状態で一
括して二次被覆を施し一体化した構造を備えていること
を特徴としている。In order to achieve the above object, the present invention provides an optical fiber unit in which two optical fiber cores are arranged parallel to each other and are collectively coated with a secondary coating. Inserting and arranging a tearing string having slack along the arrangement of the optical fiber cores into a gap formed between the envelope of the outer peripheral surface of the core wire and the outer peripheral surfaces of the two optical fiber core wires, Two optical fiber strands and tear string,
The present invention is characterized in that it has an integrated structure in which the slack portion of the tear string is exposed to the outside and a secondary coating is applied all at once.
本発明の分離形光ファイバユニットは、２６単位のユニ
ット構成で、２本の光ファイバ心線の平行配列間の空隙
に、たるみをもたせた引裂き紐を光ファイバ心線に沿っ
て配置し、たるみ部分が外部に露出する状態で光ファイ
バ心線および引裂き紐を一括被覆した構成であることか
ら、たとえば加入者系の光ケーブルに多心収納された場
合、分岐に必要な２６単位で分離すること、および２６
単位のユニットが細小な寸法であっても、一括被覆の二
次被覆の外部に露出している引裂き紐のたるみ部分を容
易に引き出して二次被覆を引き裂き、光ファイバ心線に
外傷を与えることなく単心ずつ分離分岐することができ
る。以下図面にもとづき実施例について説明する。The separable optical fiber unit of the present invention has a unit configuration of 26 units, and a tear string with slack is arranged along the optical fiber core in the gap between two parallel optical fiber cores, and the slack is removed. Since the optical fiber core wire and the tear string are coated all at once with the part exposed to the outside, for example, when multiple fibers are stored in a subscriber system optical cable, it is necessary to separate them into 26 units required for branching. and 26
Even if the unit size is small, the slack part of the tear string exposed to the outside of the secondary coating of the bulk coating can be easily pulled out, tearing the secondary coating, and causing damage to the optical fiber core wire. It is possible to separate and branch each single core without any problems. Examples will be described below based on the drawings.
第１図ａ、ｂに本発明の分離形光ファイバユニットの実
施例の断面および構成の概要を示す。１は光ファイバ心
線で、本実施例では径２５０μｍφの紫外線硬化樹脂（
以下ＵＶ樹脂と云う。）被覆光ファイバを用いた。光フ
ァイバ心線１を２本手行に配列し、２本の光ファイバ心
線外周面の包絡線と２本の光ファイバ心線外周面との間
に形成される空隙部に、引裂き紐２としてたとえばケブ
ラ■を適当にたるみをもたせて配置し、ＵＶ樹脂により
−・括して二次被覆３を施す。FIGS. 1a and 1b show an outline of the cross section and structure of an embodiment of the split optical fiber unit of the present invention. 1 is an optical fiber core, and in this example, it is made of ultraviolet curing resin (with a diameter of 250 μmφ).
Hereinafter referred to as UV resin. ) coated optical fiber was used. Two coated optical fibers 1 are arranged in a row, and a tear string 2 is inserted into the gap formed between the envelope of the outer peripheral surfaces of the two coated optical fibers and the outer circumferential surface of the two coated optical fibers. For example, Kevlar (2) is placed with an appropriate amount of slack, and the secondary coating (3) is applied by enclosing it with UV resin.
光ケーブルにより光通信網を構成する光通信システムに
おいて、網構成の基本単位である光ファイバ２心ユニツ
トごとの途中分岐に際して、本発明の光ファイバユニツ
１−は容易に分岐でき、また多重構成を用いた場合の単
心ごとの途中分岐が必要な場合には、二次被覆の外部に
露出している引裂き紐の部分を引き出して二次被覆を引
裂き、光ファイバ心線に外（葛を与える危惧なく、容易
かつ安定、確実に光ファイバ単心の分離を行うことがで
きる。In an optical communication system in which an optical communication network is constructed using optical cables, the optical fiber unit 1- of the present invention can be easily branched in the middle of each two-core optical fiber unit, which is the basic unit of the network structure, and can also be used in a multiplexed configuration. If it is necessary to branch each single fiber in the middle, pull out the part of the tear string that is exposed outside the secondary coating, tear the secondary coating, and remove the risk of damaging the optical fiber. It is possible to easily, stably, and reliably separate single optical fibers.
以上説明したように、本発明の分離形光ファイバユニッ
トは、平行に配列した２本の光ファイバ心線相互の間の
空隙に、光ファイバ心線に沿ってたるみをもたせた引裂
き紐を配置し、引裂き紐のたるみ部分を外部に露出する
状態で、光ファイバ心線および引裂き紐をともに一括し
て二次被覆を施し一体化した２６単位の光ファイバユニ
ットであることから、光ケーブルに収納した場合、２６
単位のユニットとしての途中分岐の取扱い性に優れ、か
つ引裂き紐により、光ファイバ単心分離を容易に、安定
、確実に行うことも出来る。したがって本発明の分離形
光ファイバユニットは、とくに加入者系の光ケーブルに
おいて、たとえばケープル布設後に、ケーブル途中で新
たな加入者が発生したときの単心あるいは２心の光ファ
イバ途中分岐を容易、かつ安定、確実に行うことができ
、その効果顕著である。As explained above, in the separable optical fiber unit of the present invention, a tear string with slack is placed along the optical fibers in the gap between two optical fibers arranged in parallel. When stored in an optical cable, since it is a 26-unit optical fiber unit in which the optical fiber core and the tear string are collectively coated with a secondary coating, with the slack part of the tear string exposed to the outside. , 26
It has excellent handling properties for midway branching as a unit, and can easily, stably, and reliably separate single optical fibers using tear strings. Therefore, the separable optical fiber unit of the present invention facilitates the branching of single-core or double-core optical fibers in the middle of a subscriber system, especially when a new subscriber occurs in the middle of the cable after cable installation. It can be performed stably and reliably, and its effects are remarkable.
第１図ａ、ｂは本発明の分離形光ファイバユニット実施
例の構造概要図、第２図は従来の２心光ファイバユニッ
ト例の断面構造図である。
１・・・光ファイバ心線、２・・・引裂き紐、３・・・
二次被覆、４・・・二次被覆
特許出願人 住友電気工業株式会社
代理人 弁理士 玉 轟 久五部
本発明の分離形光ファイバユニット実施例構造概要図第
１ 図
従来の２心光ファイバユニット例断面構造図第２図FIGS. 1a and 1b are structural schematic diagrams of an embodiment of a separate type optical fiber unit of the present invention, and FIG. 2 is a cross-sectional structural diagram of an example of a conventional twin-core optical fiber unit. 1... Optical fiber core wire, 2... Tear string, 3...
Secondary coating, 4...Secondary coating Patent applicant Sumitomo Electric Industries Co., Ltd. Agent Patent attorney Todoroki Tama Structural diagram of an embodiment of the separable optical fiber unit of the present invention Fig. 1 Conventional twin-core optical fiber Unit example cross-sectional structure diagram Figure 2
Claims (1)
二次被覆を施し一体化した光ファイバユニットにおいて
、 前記平行に配列した２本の光ファイバ心線外周面の包絡
線と前記２本の光ファイバ心線外周面との間に形成され
る空隙部分に、 前記光ファイバ心線の配列に沿つてたるみを有した引裂
き紐を挿入配置し、 前記２本の光ファイバ心線および引裂き紐を、前記引裂
き紐のたるみの部分を外部に露出する状態で一括して二
次被覆を施し一体化した構造を備えてなる ことを特徴とする分離形光ファイバユニット。[Scope of Claims] In an optical fiber unit in which two optical fibers are arranged parallel to each other and are collectively coated with a secondary coating and integrated, the outer circumferential surface of the two parallelly arranged optical fibers is A tear string having slack along the arrangement of the optical fibers is inserted into a gap formed between the envelope of the optical fibers and the outer circumferential surface of the two optical fibers, 1. A separable optical fiber unit comprising a structure in which an optical fiber core and a tear string are integrally coated with a secondary coating with the slack portion of the tear string exposed to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038933A JPH01257806A (en) | 1988-02-22 | 1988-02-22 | Separation type optical fiber unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038933A JPH01257806A (en) | 1988-02-22 | 1988-02-22 | Separation type optical fiber unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01257806A true JPH01257806A (en) | 1989-10-13 |
Family
ID=12539029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63038933A Pending JPH01257806A (en) | 1988-02-22 | 1988-02-22 | Separation type optical fiber unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01257806A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03156410A (en) * | 1989-11-15 | 1991-07-04 | Toyokuni Densen Kk | Optical cable for communication |
| JPH05257170A (en) * | 1992-03-16 | 1993-10-08 | Fujitsu Ltd | Production of active matrix liquid crystal display device |
| JPH0615014U (en) * | 1992-07-23 | 1994-02-25 | 古河電気工業株式会社 | Fiber optic cable |
| WO2018025814A1 (en) * | 2016-08-04 | 2018-02-08 | 株式会社フジクラ | Optical fiber cable |
-
1988
- 1988-02-22 JP JP63038933A patent/JPH01257806A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03156410A (en) * | 1989-11-15 | 1991-07-04 | Toyokuni Densen Kk | Optical cable for communication |
| JPH05257170A (en) * | 1992-03-16 | 1993-10-08 | Fujitsu Ltd | Production of active matrix liquid crystal display device |
| JPH0615014U (en) * | 1992-07-23 | 1994-02-25 | 古河電気工業株式会社 | Fiber optic cable |
| WO2018025814A1 (en) * | 2016-08-04 | 2018-02-08 | 株式会社フジクラ | Optical fiber cable |
| JP2018022064A (en) * | 2016-08-04 | 2018-02-08 | 株式会社フジクラ | Optical fiber cable |
| CN109313316A (en) * | 2016-08-04 | 2019-02-05 | 株式会社藤仓 | Connectorized fiber optic cabling |
| AU2017306117B2 (en) * | 2016-08-04 | 2020-07-09 | Fujikura Ltd. | Optical fiber cable |
| US11002928B2 (en) | 2016-08-04 | 2021-05-11 | Fujikura Ltd. | Optical fiber cable |
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