JPH0875968A - Manufacture of self-supported optical cable - Google Patents
Manufacture of self-supported optical cableInfo
- Publication number
- JPH0875968A JPH0875968A JP6211147A JP21114794A JPH0875968A JP H0875968 A JPH0875968 A JP H0875968A JP 6211147 A JP6211147 A JP 6211147A JP 21114794 A JP21114794 A JP 21114794A JP H0875968 A JPH0875968 A JP H0875968A
- Authority
- JP
- Japan
- Prior art keywords
- optical cable
- speed
- coating machine
- self
- extrusion coating
- 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
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、光ケーブルに支持線を
添えて一体化した自己支持型光ケーブルの製造方法に係
り、特に、架設時に光ケーブルに生じる伸び歪に大きさ
の等しい圧縮歪を持たせた、製造容易な自己支持型光ケ
ーブルの製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a self-supporting optical cable in which a supporting wire is attached to an optical cable to integrate it, and in particular, elongation strain generated in the optical cable at the time of installation has compressive strain of equal magnitude. In addition, the present invention relates to a method for manufacturing a self-supporting optical cable that is easy to manufacture.
【0002】[0002]
【従来の技術】架空光ケーブルとして自己支持型光ケー
ブルが広く使用されている。図2に示されるように、自
己支持型光ケーブル21は、単数本又は複数本の光ファ
イバ22を撚合わせ等により集合した光ケーブル3と、
単数本又は複数本の亜鉛メッキ鋼線23等からなる支持
線1と、これらを一括する外被24とからなる。自己支
持型光ケーブル21は、光ケーブル3と支持線1とを一
体化することにより、架設時にかかる張力を主に支持線
1に負担させるようにしたものである。この種の自己支
持型光ケーブルは、電柱への引留めが容易であること、
また、製造方法が容易であることから広く使用されてい
る。2. Description of the Related Art Self-supporting optical cables are widely used as aerial optical cables. As shown in FIG. 2, the self-supporting optical cable 21 includes an optical cable 3 in which a single or a plurality of optical fibers 22 are assembled by twisting or the like,
The support wire 1 is composed of a single or a plurality of galvanized steel wires 23 and the like, and an outer cover 24 that bundles these. The self-supporting optical cable 21 is configured such that the optical cable 3 and the supporting wire 1 are integrated so that the tension applied during installation is mainly applied to the supporting wire 1. This type of self-supporting optical cable is easy to hold on a utility pole,
Further, it is widely used because of its easy manufacturing method.
【0003】その製造方法は、単数本又は複数本の亜鉛
メッキ鋼線23等からなる支持線1を、単数本又は複数
本の光ファイバ22を撚合わせ等により集合した光ケー
ブル3に対し所定間隔離して平行に縦添えし、これらに
一括して外被24を押出被覆している。The manufacturing method is as follows. A support wire 1 made of a single or a plurality of galvanized steel wires 23 or the like is separated for a predetermined distance from an optical cable 3 in which a single or a plurality of optical fibers 22 are assembled by twisting or the like. And the outer jacket 24 is collectively covered by extrusion coating.
【0004】[0004]
【発明が解決しようとする課題】ところで、自己支持型
光ケーブルを電柱間に架設した場合、支持線に対しては
数百Kgもの張力が加わり、その伸び率は0.5%に達
する。この結果、光ケーブルにも0.5%の伸びが生じ
ることになる。一方、光ケーブルを構成する光ファイバ
は、伸びが0.2%を越えると伝送特性、長期信頼性等
に問題を生じる。By the way, when a self-supporting optical cable is installed between utility poles, a tension of several hundred kg is applied to the supporting wire, and its elongation rate reaches 0.5%. As a result, 0.5% elongation is also generated in the optical cable. On the other hand, the optical fiber forming the optical cable has a problem in transmission characteristics, long-term reliability, etc. when the elongation exceeds 0.2%.
【0005】架設時に大きな伸びが生じないようにする
には、支持線を太く、強くすることも考えられるが、自
己支持型光ケーブルの外径が太くなり、重量が増すた
め、架設が困難になると共に単価が高くなり不経済であ
る。It is possible to make the support wire thicker and stronger in order to prevent a large elongation during the installation, but the outer diameter of the self-supporting optical cable becomes thicker and the weight increases, so that the installation becomes difficult. Along with this, the unit price increases and it is uneconomical.
【0006】実開昭56−47503号、特開昭63−
287918号等によって公知となった技術は、製造過
程において予め支持線に張力を与えておき、この支持線
と光ファイバとを被覆によって一体化した後、この張力
を取り除くものである。これによって、製品となった自
己支持型光ケーブルは光ファイバが圧縮された状態とな
り、架設時に生じる支持線の伸びに対して光ファイバの
伸びる余裕があることになる。Japanese Utility Model Publication No. 56-47503, JP-A-63-
The technology known from No. 287918 or the like is to apply tension to a support wire in advance in a manufacturing process, integrate the support wire and an optical fiber by coating, and then remove the tension. As a result, the self-supporting optical cable that has become a product has the optical fiber compressed, and there is a margin to extend the optical fiber with respect to the extension of the supporting wire that occurs during installation.
【0007】しかし、これらの方法は、支持線の張力を
取り除くことによって光ファイバの圧縮を図っており、
直接、光ファイバが圧縮されるわけではないので、光フ
ァイバに所望の圧縮歪を与えることが困難である。However, these methods attempt to compress the optical fiber by removing the tension of the supporting wire,
Since the optical fiber is not directly compressed, it is difficult to give the desired compressive strain to the optical fiber.
【0008】また、これらの方法は被覆された製品が縮
むことになるので、被覆過程の製造能力に対し得られる
製品の量が少ないことになる。Also, these methods result in shrinkage of the coated product, which results in less product available relative to the manufacturing capacity of the coating process.
【0009】そこで、本発明の目的は、上記課題を解決
し、架設時に光ケーブルに生じる伸び歪に大きさの等し
い圧縮歪を持たせた、製造容易な自己支持型光ケーブル
の製造方法を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a manufacturing method of a self-supporting optical cable which is easy to manufacture, in which the elongation strain generated in the optical cable at the time of installation has a compressive strain of the same magnitude. It is in.
【0010】[0010]
【課題を解決するための手段】上記目的を達成するため
に本発明は、光ファイバを集合してなる光ケーブルに金
属等からなる支持線を添えて押出被覆機に送り込み、光
ケーブルと支持線とに一括して外被を押出被覆し、架設
時にかかる張力を主に支持線に負担させる自己支持型光
ケーブルの製造方法において、上記光ケーブルを押出被
覆機に送り込む速度を、支持線を送り込む速度及びこれ
らを押出被覆機から引き出す速度よりも速くして、架設
時に光ケーブルに生じる伸び歪に大きさの等しい圧縮歪
が生じるように光ケーブルを圧縮するものである。In order to achieve the above object, the present invention provides an optical cable formed by assembling optical fibers with a supporting wire made of metal or the like and sending the optical cable to an extrusion coating machine to form an optical cable and a supporting wire. In a method for manufacturing a self-supporting optical cable in which the outer cover is extrusion-coated at one time and the tension applied during installation is mainly applied to the support wire, the speed at which the optical cable is sent to the extrusion coating machine, the speed at which the support wire is sent, and The optical cable is compressed at a speed higher than the speed at which the optical cable is pulled out from the extrusion coating machine, so that the compressive strain having the same magnitude as the stretching strain generated in the optical cable during installation is generated.
【0011】光ケーブルを一対の無限軌道で挟んで光ケ
ーブルを押出被覆機に送り込み、この無限軌道の送り込
み速度を押出被覆機の排出速度より圧縮歪に応じた割合
で速めてもよい。The optical cable may be sandwiched between a pair of endless tracks, and the optical cable may be fed into an extrusion coating machine, and the feeding speed of this endless track may be made faster than the discharge speed of the extrusion coating machine at a rate according to the compression strain.
【0012】[0012]
【作用】上記構成により、光ケーブルを押出被覆機に送
り込む速度が押出被覆機から引き出す速度よりも速いの
で、光ケーブルは圧縮された状態で支持線と一体化され
る。この圧縮は光ケーブルにのみ生じ、支持線は圧縮さ
れない。この支持線が光ケーブルコアに添えられ、光ケ
ーブルと支持線とに一括して外被が押出被覆されること
により、一体化が達成される。この一体化されて製品と
なった自己支持型光ケーブルは、光ケーブルが圧縮され
た状態となり、架設時に生じる支持線の伸びに対して光
ケーブルの伸びる余裕があることになる。架設時に光ケ
ーブルに生じる伸び歪に大きさの等しい圧縮歪が生じる
ように圧縮されているので、架設時には光ケーブルに歪
みがないことになる。With the above construction, since the speed of feeding the optical cable to the extrusion coating machine is faster than the speed of pulling it out of the extrusion coating machine, the optical cable is integrated with the support wire in a compressed state. This compression occurs only in the optical cable, the support line is not compressed. The support wire is attached to the optical cable core, and the jacket is extrusion-coated on the optical cable and the support wire at a time, whereby integration is achieved. In this self-supporting optical cable that has been integrated into a product, the optical cable is in a compressed state, and there is a margin for the optical cable to extend with respect to the extension of the supporting wire that occurs during installation. Since the optical cable is compressed so that the compressive strain of which the magnitude is equal to the extension strain generated in the optical cable at the time of installation, the optical cable has no distortion at the time of installation.
【0013】この方法によれば、光ケーブルを直接、圧
縮しているので、所望の圧縮歪を得ることが容易であ
る。また、送り込む速度を引き出す速度よりも速くして
圧縮しているので、その速度差が圧縮歪に直接、現れる
ことになり、所望の圧縮歪を得ることが容易である。ま
た、押出被覆機を出た製品は縮むことがないから、押出
被覆機の製造能力どおりの製品量が得られる。According to this method, since the optical cable is directly compressed, it is easy to obtain a desired compression strain. In addition, since the compression is performed at a higher speed than the speed at which the material is fed in, the difference in speed directly appears in the compression strain, and it is easy to obtain the desired compression strain. Further, since the product exiting the extrusion coater does not shrink, the product amount can be obtained according to the production capacity of the extrusion coater.
【0014】光ケーブルを一対の無限軌道で挟んで光ケ
ーブルを押出被覆機に送り込むことにより、無限軌道の
速度で送り込み速度が制御できる。この無限軌道の送り
込み速度を押出被覆機の排出速度より圧縮歪に応じた割
合で速めることにより、容易に所望した圧縮歪を得るこ
とができる。By feeding the optical cable to the extrusion coating machine while sandwiching the optical cable between a pair of endless tracks, the feeding speed can be controlled at the speed of the endless track. The desired compression strain can be easily obtained by increasing the feeding speed of the endless track from the discharge speed of the extrusion coating machine at a rate according to the compression strain.
【0015】[0015]
【実施例】以下本発明の一実施例を添付図面に基づいて
詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
【0016】図1に本発明による自己支持型光ケーブル
の製造工程を示す。図示されるように、7本の亜鉛メッ
キ鋼線を撚合わせてなる支持線1を収容する支持線用ド
ラム2と、7本の光ファイバを集合してなる光ケーブル
3を収容する光ケーブル用ドラム4と、光ケーブル3を
挟んで設けた一対の無限軌道からなる送出機構5と、光
ケーブル3の外径に略同等の内径を有するパイプ6と、
光ケーブル3及び支持線1に一括して外被を被覆する押
出被覆機7と、押出被覆機7から出てきた自己支持型光
ケーブル21を冷却するための水槽8と、自己支持型光
ケーブル21を挟んで設けた一対の無限軌道からなる引
出機構9と、送出機構5の速度を引出機構9の速度より
任意の割合で速めるコントローラ10と、自己支持型光
ケーブル21を製品として巻き取る巻取ドラム11とか
ら構成される。FIG. 1 shows a manufacturing process of a self-supporting optical cable according to the present invention. As shown, a supporting wire drum 2 for accommodating a supporting wire 1 formed by twisting seven galvanized steel wires, and an optical cable drum 4 for accommodating an optical cable 3 formed by assembling seven optical fibers. And a delivery mechanism 5 composed of a pair of endless tracks provided with the optical cable 3 interposed therebetween, and a pipe 6 having an inner diameter substantially equal to the outer diameter of the optical cable 3.
The extrusion coating machine 7 that collectively coats the optical cable 3 and the support wire 1 with the jacket, the water tank 8 for cooling the self-supporting optical cable 21 coming out of the extrusion coating machine 7, and the self-supporting optical cable 21 are sandwiched. And a controller 10 for increasing the speed of the feeding mechanism 5 at an arbitrary rate from the speed of the drawing mechanism 9, and a winding drum 11 for winding the self-supporting optical cable 21 as a product. Composed of.
【0017】図1において、支持線用ドラム2から支持
線1が供給され、光ケーブル用ドラム4から光ケーブル
3が供給される。光ケーブル3は送出機構5により強制
的に送り出される。送り出された光ケーブル3はパイプ
6を通して案内され押出被覆機7に取り込まれる。押出
被覆機7では、光ケーブル3に支持線1が所定間隔離し
て平行に縦添えされ、その状態で外被が施される。押出
被覆機7から排出される自己支持型光ケーブル21は水
槽8で冷却された後、引出機構9に至る。引出機構9が
自己支持型光ケーブル21を引き出す速度は押出被覆機
7の排出速度と同じである。引出機構9から排出される
自己支持型光ケーブル21は製品として巻取ドラム11
に巻き取られる。In FIG. 1, the supporting wire 1 is supplied from the supporting wire drum 2, and the optical cable 3 is supplied from the optical cable drum 4. The optical cable 3 is forcibly delivered by the delivery mechanism 5. The sent out optical cable 3 is guided through a pipe 6 and taken into an extrusion coating machine 7. In the extrusion coating machine 7, the support wire 1 is vertically laid parallel to the optical cable 3 with a predetermined space between them, and the outer cable is applied in this state. The self-supporting optical cable 21 discharged from the extrusion coating machine 7 is cooled in the water tank 8 and then reaches the drawing mechanism 9. The speed at which the pull-out mechanism 9 pulls out the self-supporting optical cable 21 is the same as the discharge speed of the extrusion coating machine 7. The self-supporting optical cable 21 discharged from the drawing mechanism 9 is the product of the winding drum 11 as a product.
To be wound up.
【0018】この間、コントローラ10は、架設時に光
ケーブル3に生じる伸び歪から圧縮歪を求め、送出機構
5の速度を引出機構9の速度に対し圧縮歪に応じた割合
で速めるように送出機構5を制御する。例えば、伸び率
が0.5%である場合、圧縮率が5%であるから、送出
機構5の速度が引出機構9の速度の0.5%増しとなる
よう制御する。光ケーブル3は押出被覆機7から引き出
されるよりも速く押出被覆機7に送り込まれ、かつパイ
プ6によって線側方向への逃げが規制されているので、
線軸方向に0.5%圧縮される。一方、支持線を送り込
む速度は押出被覆機7の排出速度と同じである。従っ
て、押出被覆機7からは、光ケーブル3のみが圧縮され
た状態の自己支持型光ケーブル21が排出され、この圧
縮状態はその後も保持される。During this time, the controller 10 obtains the compressive strain from the extension strain generated in the optical cable 3 at the time of installation, and speeds up the speed of the sending mechanism 5 at a rate corresponding to the compressive strain with respect to the speed of the drawing mechanism 9. Control. For example, when the elongation rate is 0.5%, the compression rate is 5%, so the speed of the delivery mechanism 5 is controlled to be 0.5% higher than the speed of the drawing mechanism 9. Since the optical cable 3 is fed into the extrusion coating machine 7 faster than being pulled out from the extrusion coating machine 7, and the escape in the line side direction is restricted by the pipe 6,
It is compressed by 0.5% in the direction of the line axis. On the other hand, the speed of feeding the support wire is the same as the discharge speed of the extrusion coating machine 7. Therefore, the self-supporting optical cable 21 in which only the optical cable 3 is compressed is discharged from the extrusion coating machine 7, and this compressed state is maintained thereafter.
【0019】このようにして製造された自己支持型光ケ
ーブル21を電柱間に架設すると、支持線1に張力がか
かり、伸びが生じる。この実施例での伸び率は0.5%
となる。この結果、光ケーブル3にも0.5%の伸びが
生じるが、製造時に与えた0.5%の圧縮と相殺され、
歪のない状態となる。従って、架設された自己支持型光
ケーブルは伝送特性、長期信頼性に問題を生じない。When the self-supporting optical cable 21 manufactured in this manner is installed between electric poles, tension is applied to the supporting wire 1 and elongation occurs. The elongation in this example is 0.5%
Becomes As a result, 0.5% elongation also occurs in the optical cable 3, but this is offset by the 0.5% compression given during manufacturing,
There will be no distortion. Therefore, the erected self-supporting optical cable does not cause any problems in transmission characteristics and long-term reliability.
【0020】[0020]
【発明の効果】本発明は次の如き優れた効果を発揮す
る。The present invention exhibits the following excellent effects.
【0021】(1)光ケーブルの方を圧縮して支持線と
一体化しているため、圧縮が直接できることになり、正
確な圧縮歪が得られる。従って、伸び歪に大きさの等し
い圧縮歪を得ることが容易となり、製造が容易となる。(1) Since the optical cable is compressed and integrated with the support line, compression can be performed directly, and accurate compression strain can be obtained. Therefore, it becomes easy to obtain the compressive strain having the same magnitude as the elongation strain, and the manufacturing becomes easy.
【0022】(2)押出被覆機を出た製品は縮まず、押
出被覆機の製造能力どおりの製品量が得られる。(2) The product discharged from the extrusion coating machine does not shrink, and the product amount according to the production capacity of the extrusion coating machine is obtained.
【図1】本発明の方法による自己支持型光ケーブルの製
造工程図である。FIG. 1 is a manufacturing process diagram of a self-supporting optical cable according to the method of the present invention.
【図2】自己支持型光ケーブルの断面図である。FIG. 2 is a cross-sectional view of a self-supporting optical cable.
1 支持線 3 光ケーブル 5 送出機構 7 押出被覆機 9 引出機構 10 コントローラ 12 無限軌道 1 Support Wire 3 Optical Cable 5 Feeding Mechanism 7 Extrusion Coating Machine 9 Drawing Mechanism 10 Controller 12 Endless Track
Claims (2)
金属等からなる支持線を添えて押出被覆機に送り込み、
光ケーブルと支持線とに一括して外被を押出被覆し、架
設時にかかる張力を主に支持線に負担させる自己支持型
光ケーブルの製造方法において、上記光ケーブルを押出
被覆機に送り込む速度を、支持線を送り込む速度及びこ
れらを押出被覆機から引き出す速度よりも速くして、架
設時に光ケーブルに生じる伸び歪に大きさの等しい圧縮
歪が生じるように光ケーブルを圧縮することを特徴とす
る自己支持型光ケーブルの製造方法。1. A support cable made of metal or the like is attached to an optical cable formed by assembling optical fibers and fed into an extrusion coating machine,
In a method for producing a self-supporting optical cable in which an optical cable and a support wire are extrusion-coated at one time so that the tension applied during erection is mainly applied to the support wire, the speed at which the optical cable is sent to an extrusion coating machine is set to the support wire. Of the self-supporting optical cable, characterized in that the optical cable is compressed at a speed higher than the speed of feeding the same and the speed of pulling them out from the extrusion coating machine, so that the elongation strain generated in the optical cable at the time of installation causes a compressive strain of equal magnitude. Production method.
ケーブルを押出被覆機に送り込み、この無限軌道の送り
込み速度を押出被覆機の排出速度より圧縮歪に応じた割
合で速めることを特徴とする請求項1記載の自己支持型
光ケーブルの製造方法。2. An optical cable is sent to an extrusion coating machine by sandwiching the optical cable between a pair of endless tracks, and the feeding speed of this endless track is made faster than the discharge speed of the extrusion coating machine at a rate according to the compression strain. Item 2. A method for manufacturing a self-supporting optical cable according to Item 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6211147A JPH0875968A (en) | 1994-09-05 | 1994-09-05 | Manufacture of self-supported optical cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6211147A JPH0875968A (en) | 1994-09-05 | 1994-09-05 | Manufacture of self-supported optical cable |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0875968A true JPH0875968A (en) | 1996-03-22 |
Family
ID=16601163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6211147A Pending JPH0875968A (en) | 1994-09-05 | 1994-09-05 | Manufacture of self-supported optical cable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0875968A (en) |
Cited By (4)
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---|---|---|---|---|
EP0877269A2 (en) * | 1997-05-09 | 1998-11-11 | Sumitomo Electric Industries, Ltd. | Over-coated optical fiber and manufacturing method thereof |
US6625365B2 (en) | 1997-05-09 | 2003-09-23 | Sumitomo Electric Industries, Ltd. | Overcoated fiber for use in optical fiber cable |
JP2013174678A (en) * | 2012-02-24 | 2013-09-05 | Fujikura Ltd | Optical fiber cable and method of manufacturing optical fiber cable |
CN108594376A (en) * | 2018-01-16 | 2018-09-28 | 山东太平洋光纤光缆有限公司 | A kind of multicore access net self-support cable and its manufacturing method |
-
1994
- 1994-09-05 JP JP6211147A patent/JPH0875968A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0877269A2 (en) * | 1997-05-09 | 1998-11-11 | Sumitomo Electric Industries, Ltd. | Over-coated optical fiber and manufacturing method thereof |
EP0877269A3 (en) * | 1997-05-09 | 1998-12-23 | Sumitomo Electric Industries, Ltd. | Over-coated optical fiber and manufacturing method thereof |
US6554938B1 (en) | 1997-05-09 | 2003-04-29 | Sumitomo Electric Industries, Ltd. | Over-coated optical fiber and manufacturing method thereof |
US6625365B2 (en) | 1997-05-09 | 2003-09-23 | Sumitomo Electric Industries, Ltd. | Overcoated fiber for use in optical fiber cable |
JP2013174678A (en) * | 2012-02-24 | 2013-09-05 | Fujikura Ltd | Optical fiber cable and method of manufacturing optical fiber cable |
CN108594376A (en) * | 2018-01-16 | 2018-09-28 | 山东太平洋光纤光缆有限公司 | A kind of multicore access net self-support cable and its manufacturing method |
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