JPH02156213A - Manufacture of self-supporting type optical cable - Google Patents
Manufacture of self-supporting type optical cableInfo
- Publication number
- JPH02156213A JPH02156213A JP63310944A JP31094488A JPH02156213A JP H02156213 A JPH02156213 A JP H02156213A JP 63310944 A JP63310944 A JP 63310944A JP 31094488 A JP31094488 A JP 31094488A JP H02156213 A JPH02156213 A JP H02156213A
- Authority
- JP
- Japan
- Prior art keywords
- optical core
- sheath
- tension
- cable
- self
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 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
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/56—Processes for repairing optical cables
- G02B6/566—Devices for opening or removing the mantle
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
［産業上の利用分野］
この発明は、ＳＳＤ型光ケーブルの製造方法に関するも
のである。
［従来の技術と発明が解決しようとする課題］（１）Ｓ
ＳＤ型光ケーブルの一例をｗ４３図に示す。
１０は吊り線で、鋼・ＦＲＰなとの高弾性率材料からな
る。
２０は光コア、
３０は共通のシース、３２は首部である。
一般に、吊り線１０と光コア２０の長さは、はぼ等しく
しである。
そのため、布設時や風力が大になったときなどに、吊り
線にに大きな張力がかかると、吊り線１０と光コア２０
とが一体になって伸びる。
その結果、光コア２０が移動し、ケーブル内の光ファイ
バに許容値以上の伸びを与えて破断させたり、あるいは
接続部の光ファイバを引張り破断させたりするおそれが
あった。
（２）上記の問題をなくすために、製造時に吊り線１０
に張力を加えておいて、光コア２０を吊り線１０よりも
長くしておくという方法もとられる。
しかし、布設時にケーブルがうねったり、光コア２０が
突き出す、などの問題がある。
［発明の目的］
■光コア２０を吊り線１０よりも長くして。
ケーブルに張力が加わったときでも、光コア２０に張力
がかからないようにするとともに、■光コア２０が突き
出したり、布設時にケーブルがうねったりするなどの問
題のない。
自己支持型光ケーブルの製造方法を提供する。
［課題を解決するための手段］ （第１．第２図）（１
）吊り線１０に光コア２０より大きい張力を加えておき
ながら、シース３０を被覆する工程と；（２）シース３
０の首部３２に、ケーブル長手方向に、間隔をおいて、
切れ目３４を形成する工程；とを有することを特徴とす
る。
［実施例］
［１］設備の概要
第１図において、
１２は吊り線１０の送出し部、
２２は光コア２０の送出し部、
１４は、吊り１１１０の送出しプーリ、。
４０は押出し機で、４２はクロスヘツド。
４４は引取リブ−りで、シース３０を施した後の吊り線
１０の部分を引取る。
４６はカッタで、たとえば押出し機４０の後に設けられ
る。
４８は制御装置で、送出しプーリ１４．引取りプーリ４
４の速度を調節する。
５０は巻取リプーリである。[Industrial Application Field] The present invention relates to a method of manufacturing an SSD type optical cable. [Problems to be solved by conventional technology and invention] (1) S
An example of an SD type optical cable is shown in Figure w43. Reference numeral 10 denotes a hanging wire, which is made of a high elastic modulus material such as steel or FRP. 20 is an optical core, 30 is a common sheath, and 32 is a neck. Generally, the lengths of the hanging wire 10 and the optical core 20 are approximately equal. Therefore, if a large tension is applied to the suspension line during installation or when wind power becomes large, the suspension line 10 and optical core 20 may
and grow together. As a result, the optical core 20 may move, causing the optical fiber in the cable to be stretched beyond a permissible value and broken, or the optical fiber at the connection portion to be pulled and broken. (2) In order to eliminate the above problem, the hanging wire 10
Another method is to apply tension to the cable and make the optical core 20 longer than the hanging wire 10. However, there are problems such as the cable undulating during installation and the optical core 20 protruding. [Object of the invention] - Make the optical core 20 longer than the hanging wire 10. Even when tension is applied to the cable, no tension is applied to the optical core 20, and (2) there are no problems such as the optical core 20 protruding or the cable undulating during installation. A method of manufacturing a self-supporting optical cable is provided. [Means to solve the problem] (Figure 1. Figure 2) (1
) covering the sheath 30 while applying a greater tension to the hanging wire 10 than the optical core 20; (2) covering the sheath 30;
0 neck 32 at intervals in the longitudinal direction of the cable,
The method is characterized by comprising a step of forming a cut 34. [Example] [1] Outline of equipment In FIG. 1, 12 is a sending part for the hanging wire 10, 22 is a sending part for the optical core 20, and 14 is a sending pulley for the hanging 1110. 40 is an extruder and 42 is a crosshead. Reference numeral 44 denotes a take-off rib for taking off the part of the hanging wire 10 after the sheath 30 has been applied. A cutter 46 is provided after the extruder 40, for example. 48 is a control device, which controls the delivery pulley 14. Take-up pulley 4
Adjust the speed of step 4. 50 is a take-up repulley.
【２】作用
（１）制御装置４８により、吊りｖｊｌｏの、送出しプ
ーリ１４による出し速度と、引取リブーリ４４による引
取り速度との比を、０．９９８〜０．９８ ： １程度
に調節する。
そうすると、送出しプーリ１４〜引珈リプーリ４４間に
おいて、吊り線１０に加わる張力が、光コア２０に加わ
る張力よりも大になる。
（２）上記のように、吊り線１０を若干引き伸ばした状
態にしておいて、押出し機４０により、共通のシース３
０を被覆する。
（３）被覆した直後のシース３０の首部３２に、カッタ
４６により、切れ口３４を、所定の間隔をおいて、とび
とびに形成する。
（４）ケーブルが用地リプーリ４４の位置を過ぎると、
吊り線１０に加わっていた張力が、はぼ消失する。
そのため、吊り線１０が、０．２〜２．０％程度収縮し
、光コア２０の方が０．２〜２．０％程度長くなる。
（５）その結果、光コア２０は、切れ口３４の部分で、
たるみ、かつ切れ目３４は開いて窓３６になる（第２図
）。
その後、ケーブルは巻取リプーリ５０に巻き取られる。
［３］製造方法の変形例
（１）カッタ４６を、引取リプ−９４４〜巻取りプーリ
５０間に設ける。
この場合、カッタ４６で首部３２に切れ目を入れると同
時に窓３６が形成され、光コア２０にたるみができる。
（２）−度ケーブルを＠き取った後、窓開けを別の工程
で行う。
［発明の効果］
吊り線に、光コアより大さい張力を加えて８Ｇながら、
シースτ欲、−１エ、こｉｆｌ！１ｍシースの首部に、
ケー／ノｌ／ｊａｆ力同に、間＋ＷＶわ９・（、りれ目
を形成する工程とを有するので、
（１）上記のように、吊り線が張力から開放されると、
切れ目のところで光コアがたるむ。
そのため、光コアにうねりや突出しが発生しないし、ま
た、光コアに過大な張力が加わるおそれがない。
（２）シースの押出しと同一ラインで、首部に窓を開け
ることができるため、製造速度は１通常のシースがけと
同じにできる。[2] Effect (1) The control device 48 adjusts the ratio of the delivery speed of the hanging vjlo by the delivery pulley 14 to the take-up speed by the take-off pulley 44 to approximately 0.998 to 0.98:1. . Then, the tension applied to the hanging wire 10 between the delivery pulley 14 and the pulling pulley 44 becomes larger than the tension applied to the optical core 20. (2) As mentioned above, with the hanging wire 10 in a slightly stretched state, the common sheath 3 is
Cover 0. (3) Cuts 34 are formed at predetermined intervals on the neck 32 of the sheath 30 immediately after being coated using the cutter 46. (4) When the cable passes the site repulley 44,
The tension applied to the hanging wire 10 almost disappears. Therefore, the suspension wire 10 contracts by about 0.2 to 2.0%, and the optical core 20 becomes longer by about 0.2 to 2.0%. (5) As a result, the optical core 20 at the cut portion 34,
The slack and cut 34 opens to form a window 36 (FIG. 2). Thereafter, the cable is wound onto the take-up repulley 50. [3] Modification of manufacturing method (1) The cutter 46 is provided between the take-up pulley 944 and the take-up pulley 50. In this case, a window 36 is formed at the same time as the cutter 46 makes a cut in the neck portion 32, and a slack is created in the optical core 20. (2) After removing the cable, open the window in a separate process. [Effect of the invention] While applying a tension of 8G to the suspension wire, which is greater than that of the optical core,
Sheath τ desire, -1e, this ifl! At the neck of the 1m sheath,
(1) As mentioned above, when the hanging wire is released from tension,
The optical core sag at the cut. Therefore, no undulations or protrusions occur in the optical core, and there is no risk of excessive tension being applied to the optical core. (2) Since the window can be opened in the neck on the same line as the extrusion of the sheath, the manufacturing speed can be the same as that of normal sheathing.
第１図は本発明の実施に使用する製造設備の一例の概略
説明図、
第２図は、本発明の方法によって製造した自己支持型光
ケーブルの説明図、
第３図は従来の自己支持型光ケーブルの説明図。
ｌＯ：吊り線 １４：送出しプーリ２０：光コア
３０：シース
３２：首部 ３４：切れ目
３６：窓 ４０：押出し機
４２ニクロスへ一２ド ４４：引取リプーリ４６二カツ
タ ４８二制御装置
５０ ：＠取すプーリFigure 1 is a schematic illustration of an example of manufacturing equipment used to carry out the present invention, Figure 2 is an illustration of a self-supporting optical cable manufactured by the method of the present invention, and Figure 3 is a conventional self-supporting optical cable. An explanatory diagram. lO: Suspension line 14: Sending pulley 20: Optical core 30: Sheath 32: Neck 34: Slit 36: Window 40: Extruder 42 Nicross 12 door 44: Take-up repulley 46 2 katsuta 48 2 control device 50: @tori pulley
Claims (1)
のシースを被覆する工程を有する、自己支持型光ケーブ
ルの製造方法において、 前記吊り線に、前記光コアより大きい張力を加えておき
ながら、前記シースを被覆する工程と；前記シースの首
部に、ケーブル長手方向に、間隔をおいて、切れ目を形
成する工程とを有する、自己支持型光ケーブルの製造方
法。[Claims] A method for manufacturing a self-supporting optical cable, which includes the steps of sending out a suspension wire and an optical core side by side and covering them with a common sheath, wherein the suspension wire is subjected to a tension greater than that of the optical core. A method for manufacturing a self-supporting optical cable, comprising the steps of: coating the sheath while adding; and forming cuts in the neck of the sheath at intervals in the longitudinal direction of the cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63310944A JPH02156213A (en) | 1988-12-08 | 1988-12-08 | Manufacture of self-supporting type optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63310944A JPH02156213A (en) | 1988-12-08 | 1988-12-08 | Manufacture of self-supporting type optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02156213A true JPH02156213A (en) | 1990-06-15 |
Family
ID=18011270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63310944A Pending JPH02156213A (en) | 1988-12-08 | 1988-12-08 | Manufacture of self-supporting type optical cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02156213A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6054070A (en) * | 1997-01-30 | 2000-04-25 | Sumitomo Electric Industries Inc. | Method of manufacturing a self-support optical cable |
| JP2003090941A (en) * | 2001-09-18 | 2003-03-28 | Fujikura Ltd | Optical fiber drop cable and its manufacturing method |
| JP2015004766A (en) * | 2013-06-20 | 2015-01-08 | 株式会社フジクラ | Optical fiber cable, and manufacturing method for the same |
-
1988
- 1988-12-08 JP JP63310944A patent/JPH02156213A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6054070A (en) * | 1997-01-30 | 2000-04-25 | Sumitomo Electric Industries Inc. | Method of manufacturing a self-support optical cable |
| JP2003090941A (en) * | 2001-09-18 | 2003-03-28 | Fujikura Ltd | Optical fiber drop cable and its manufacturing method |
| JP4727870B2 (en) * | 2001-09-18 | 2011-07-20 | 株式会社フジクラ | Fiber optic drop cable |
| JP2015004766A (en) * | 2013-06-20 | 2015-01-08 | 株式会社フジクラ | Optical fiber cable, and manufacturing method for the same |
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