JPH10259036A - Cooler for optical fiber - Google Patents
Cooler for optical fiberInfo
- Publication number
- JPH10259036A JPH10259036A JP9068015A JP6801597A JPH10259036A JP H10259036 A JPH10259036 A JP H10259036A JP 9068015 A JP9068015 A JP 9068015A JP 6801597 A JP6801597 A JP 6801597A JP H10259036 A JPH10259036 A JP H10259036A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- cooling
- refrigerant
- temperature
- cooling cylinder
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/55—Cooling or annealing the drawn fibre prior to coating using a series of coolers or heaters
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/60—Optical fibre draw furnaces
- C03B2205/74—Means for moving at least a part of the draw furnace, e.g. by rotation or vertical or horizontal movement
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、線引きれた光ファ
イバに樹脂を塗布するのに先立ち、この光ファイバを室
温程度にまで冷却するための光ファイバ冷却装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cooling apparatus for cooling a drawn optical fiber to a room temperature before applying a resin to the drawn optical fiber.
【０００２】[0002]
【従来の技術】一般に、光ファイバ用母材を加熱溶融す
る線引き炉から引き出された光ファイバは、その補強の
ために直ちに樹脂塗布装置に通され、外周を紫外線硬化
樹脂などで被覆するようにしている。この場合、線引き
炉から引き出された１０００℃程度の光ファイバを５０
℃から室温程度にまで冷却して樹脂塗布装置に送り込む
必要がある。因みに、光ファイバの線引き速度が毎分１
５０メートル程度以下の場合には、自然冷却によって光
ファイバの冷却が可能であるが、それ以上の速度で光フ
ァイバを線引きする場合には、樹脂塗布装置に送り込ま
れる光ファイバの温度が５０℃を越えてしまい、樹脂の
塗布が不安定となってしまうことから、通常、線引き炉
と樹脂塗布装置との間に、光ファイバを強制冷却するた
めの冷却装置が介装されている。2. Description of the Related Art In general, an optical fiber drawn from a drawing furnace for heating and melting an optical fiber base material is immediately passed through a resin coating device to reinforce the optical fiber, and the outer periphery is coated with an ultraviolet curing resin or the like. ing. In this case, an optical fiber of about 1000 ° C. drawn out of the drawing furnace is used for 50 times.
It is necessary to cool from the temperature of about ° C. to about room temperature and send it to the resin coating device. By the way, the drawing speed of the optical fiber is 1 / min.
In the case of about 50 meters or less, the optical fiber can be cooled by natural cooling. However, when the optical fiber is drawn at a higher speed, the temperature of the optical fiber fed into the resin coating device is reduced to 50 ° C. Since the temperature exceeds the temperature and the application of the resin becomes unstable, a cooling device for forcibly cooling the optical fiber is usually interposed between the drawing furnace and the resin application device.
【０００３】このような従来の光ファイバ冷却装置とし
ては、例えば特開平２−２２１１３６号公報や、特開平
５−１８６２３８号公報などに開示されたようなものが
周知となっている。As such conventional optical fiber cooling devices, those disclosed in, for example, JP-A-2-221136 and JP-A-5-186238 are well known.
【０００４】特開平２−２２１１３６号公報に開示され
た光ファイバ線引き装置は、線引き炉の下端と樹脂塗布
装置の上端とを冷却筒を介して連通させ、冷却筒内を気
密に保持した状態でここを通過する光ファイバを冷却す
るようにしたものである。また、特開平５−１８６２３
８号公報に開示された光ファイバの線引装置は、光ファ
イバの走行方向に直列に並ぶ複数の冷却管を伸縮可能な
連結筒によって相互に気密に連結し、光ファイバを効率
よく冷却できるようにしたものである。In the optical fiber drawing apparatus disclosed in Japanese Patent Application Laid-Open No. 2-221136, the lower end of a drawing furnace is communicated with the upper end of a resin coating device via a cooling cylinder, and the inside of the cooling cylinder is kept airtight. The optical fiber passing therethrough is cooled. Also, Japanese Patent Application Laid-Open No. 5-18623
The optical fiber drawing apparatus disclosed in Japanese Patent Application Laid-Open No. H08-20878 allows a plurality of cooling pipes arranged in series in the running direction of the optical fiber to be air-tightly connected to each other by a telescopic connecting cylinder so that the optical fiber can be efficiently cooled. It was made.
【０００５】[0005]
【発明が解決しようとする課題】特開平２−２２１１３
６号公報に開示された従来の光ファイバ線引き装置で
は、冷却筒が気密構造となっているため、冷却筒内の圧
力が線引き炉内の圧力よりも高いと、冷却筒内の冷えた
雰囲気ガスが線引き炉内に流れ込む結果、線引き炉内で
の光ファイバの線引き条件が不安定となって、光ファイ
バの線径が大きく変動してしまうという不具合が発生す
る。逆に、冷却筒内の圧力が線引き炉内の圧力よりも低
いと、線引き炉内の高温の雰囲気ガスが冷却筒内に流れ
込む結果、冷却筒での光ファイバの冷却効率が著しく低
下してしまうという不具合が発生する。Problems to be Solved by the Invention
In the conventional optical fiber drawing apparatus disclosed in Japanese Patent Publication No. 6 (1994), since the cooling cylinder has an airtight structure, if the pressure in the cooling cylinder is higher than the pressure in the drawing furnace, the cooled atmosphere gas in the cooling cylinder is Flows into the drawing furnace, as a result, the drawing conditions of the optical fiber in the drawing furnace become unstable, and a problem occurs that the fiber diameter of the optical fiber fluctuates greatly. Conversely, if the pressure in the cooling cylinder is lower than the pressure in the drawing furnace, high-temperature atmospheric gas in the drawing furnace flows into the cooling cylinder, resulting in a significant decrease in the cooling efficiency of the optical fiber in the cooling cylinder. The problem described above occurs.
【０００６】一方、特開平５−１８６２３８号公報に開
示された従来の光ファイバの線引装置では、連結筒の部
分に温度調整機能がないため、この連結筒内の雰囲気温
度が光ファイバから受ける熱によって上昇して行き、光
ファイバの熱交換効率を低下させる不具合がある。ま
た、連結筒が伸縮構造となっているため、連結筒の内径
が冷却筒と同じ一様な内径ではなく、段付きとなって内
部伝熱ガスの流れに乱れが発生する。この結果、冷却筒
および連結筒を通過する光ファイバに振れが発生し、線
径変動などを引き起こす虞がある。On the other hand, in the conventional optical fiber drawing apparatus disclosed in Japanese Patent Application Laid-Open No. 5-186238, the temperature of the connecting cylinder is not affected by the ambient temperature in the connecting cylinder because the connecting cylinder does not have a temperature adjusting function. There is a problem that the heat exchange efficiency rises due to heat and lowers the heat exchange efficiency of the optical fiber. In addition, since the connecting cylinder has a telescoping structure, the inner diameter of the connecting cylinder is not the same as the cooling cylinder, but is stepped, and the flow of the internal heat transfer gas is disturbed. As a result, the optical fiber passing through the cooling tube and the connecting tube may be shaken, which may cause a change in the wire diameter.
【０００７】しかも、これら従来の冷却装置に設けられ
た冷却筒は、冷媒として水を用いているため、冷却筒の
下端出口部と光ファイバとの温度差がほとんどなくなっ
てしまい、この結果、冷却筒の下端出口部側ほど冷却能
力が低下してしまうという根源的な問題があった。In addition, since the cooling cylinders provided in these conventional cooling devices use water as a refrigerant, the temperature difference between the outlet of the lower end of the cooling cylinder and the optical fiber is almost eliminated. There is a fundamental problem that the cooling capacity decreases as the lower end exit side of the cylinder decreases.
【０００８】[0008]
【発明の目的】本発明の目的は、光ファイバの線引き速
度に応じて効率良く光ファイバを冷却し得る光ファイバ
冷却装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an optical fiber cooling device capable of efficiently cooling an optical fiber according to the drawing speed of the optical fiber.
【０００９】[0009]
【課題を解決するための手段】本発明の第１の形態は、
光ファイバ用母材を加熱溶融する線引き炉と、この線引
き炉から引き出される光ファイバに樹脂を塗布するため
の樹脂塗布装置との間に設けられて前記光ファイバを冷
却するための冷却装置であって、前記光ファイバに沿っ
て配設されて前記光ファイバをそれぞれ囲む複数段の冷
却筒と、これら冷却筒にそれぞれ設けられて当該冷却筒
内に冷媒を通す冷媒通路と、これら冷媒通路に冷媒をそ
れぞれ供給するための冷媒供給装置と、個々の前記冷却
筒に供給される冷媒の温度をそれぞれ制御する冷媒温度
制御手段と、前記複数段の冷却筒を前記光ファイバに沿
って移動してこれらを相互に連結するための連結手段と
を具え、前記冷却筒は、それぞれ前記光ファイバとの対
向方向に移動可能に複数に分割した複数の分割片で構成
され、これら複数の分割片を前記光ファイバとの対向方
向に駆動するための開閉手段をさらに具えたことを特徴
とする光ファイバ冷却装置にある。According to a first aspect of the present invention, there is provided:
A cooling device for cooling the optical fiber, which is provided between a drawing furnace for heating and melting the optical fiber base material and a resin coating device for applying a resin to the optical fiber drawn from the drawing furnace. A plurality of cooling cylinders arranged along the optical fiber and surrounding the optical fiber, a refrigerant passage provided in each of the cooling cylinders and passing a refrigerant through the cooling cylinder; And a refrigerant temperature control means for controlling the temperature of the refrigerant supplied to each of the cooling cylinders, and moving the plurality of cooling cylinders along the optical fiber. Connecting means for interconnecting the optical fiber, the cooling cylinder is constituted by a plurality of divided pieces movably divided in a direction facing the optical fiber, respectively, There divided pieces to the optical fiber cooling apparatus, characterized in that it further comprises a switching means for driving in opposite directions between the optical fiber.
【００１０】この第１の形態の光ファイバ冷却装置によ
ると、光ファイバの線引き速度が相対的に高い場合、そ
の冷却効率を上げるために、開閉手段を操作して各冷却
筒の分割片をそれぞれ光ファイバ側に移動し、光ファイ
バを囲む空間をそれぞれ形成する。また、連結手段を操
作して各冷却筒を光ファイバの線引き方向に沿って一直
線状に重ね合わせ、長尺化する。According to the optical fiber cooling device of the first embodiment, when the drawing speed of the optical fiber is relatively high, in order to increase the cooling efficiency, the opening and closing means are operated to separate the divided pieces of each cooling cylinder. It moves to the optical fiber side and forms spaces surrounding the optical fiber. Further, by operating the connecting means, the respective cooling cylinders are linearly overlapped with each other along the drawing direction of the optical fiber to be elongated.
【００１１】一方、光ファイバの線引き速度が相対的に
遅い場合、光ファイバの過冷却を避ける必要上、開閉手
段を操作して各冷却筒の分割片を光ファイバの線引き方
向に沿って相互に引き離し、上述した空間にそれぞれ隙
間を形成する。また、連結手段を操作して各冷却筒を相
互に分離し、これら各冷却筒の間に隙間を形成する。On the other hand, when the drawing speed of the optical fiber is relatively slow, it is necessary to avoid overcooling of the optical fiber, and the opening and closing means are operated to separate the divided pieces of each cooling cylinder along the drawing direction of the optical fiber. Separate to form gaps in the above-mentioned spaces. Further, the connecting means is operated to separate the cooling cylinders from each other, and a gap is formed between the cooling cylinders.
【００１２】このようにして、冷媒温度制御手段により
所定の温度に制御された冷媒が冷媒供給手段から各冷却
筒の冷媒通路に供給され、ここを通過する光ファイバの
冷却を行って光ファイバを適当な温度にまで冷却した
後、これを樹脂塗布装置に送り出す。In this manner, the refrigerant controlled to a predetermined temperature by the refrigerant temperature control means is supplied from the refrigerant supply means to the refrigerant passages of the respective cooling cylinders, and the optical fibers passing therethrough are cooled to change the optical fibers. After cooling to an appropriate temperature, it is sent to a resin coating device.
【００１３】また、本発明の第２の形態は、光ファイバ
用母材を加熱溶融する線引き炉と、この線引き炉から引
き出される光ファイバに樹脂を塗布するための樹脂塗布
装置との間に設けられて前記光ファイバを冷却するため
の冷却装置であって、前記光ファイバを囲む第１の冷却
筒と、前記光ファイバに沿って配設されて前記光ファイ
バを囲む少なくとも１つの第２の冷却筒と、これら第１
および第２の冷却筒にそれぞれ設けられて当該冷却筒内
に冷媒を通す冷媒通路と、これら冷媒通路に冷媒をそれ
ぞれ供給するための冷媒供給装置と、前記第２の冷却筒
を前記光ファイバに沿って移動して前記第１の冷却筒と
共に相互に連結するための連結手段とを具え、前記冷却
筒は、それぞれ前記光ファイバとの対向方向に移動可能
に複数に分割した複数の分割片で構成され、これら複数
の分割片を前記光ファイバとの対向方向に駆動するため
の開閉手段をさらに具えたことを特徴とする光ファイバ
冷却装置にある。A second embodiment of the present invention is provided between a drawing furnace for heating and melting an optical fiber preform and a resin coating device for applying a resin to an optical fiber drawn from the drawing furnace. A cooling device for cooling the optical fiber, the first cooling tube surrounding the optical fiber, and at least one second cooling device disposed along the optical fiber and surrounding the optical fiber. Tube and these first
And a refrigerant passage provided in each of the second cooling cylinders and passing a refrigerant through the cooling cylinder, a refrigerant supply device for supplying the refrigerant to each of the refrigerant passages, and the second cooling cylinder being connected to the optical fiber. Connecting means for moving along the first cooling cylinder and interconnecting the first cooling cylinder with the first cooling cylinder, wherein the cooling cylinder comprises a plurality of divided pieces each of which is divided into a plurality so as to be movable in a direction facing the optical fiber. The optical fiber cooling device further comprises an opening / closing means for driving the plurality of divided pieces in a direction facing the optical fiber.
【００１４】この第２の形態の光ファイバ冷却装置によ
ると、光ファイバの線引き速度が相対的に高い場合、そ
の冷却効率を上げるために、開閉手段を操作して第１お
よび第２の冷却筒の分割片をそれぞれ光ファイバ側に移
動し、光ファイバを囲む空間をそれぞれ形成する。ま
た、連結手段を操作して第２の冷却筒を第１の冷却筒に
対して一直線状に重ね合わせ、長尺化する。According to the optical fiber cooling device of the second embodiment, when the drawing speed of the optical fiber is relatively high, the opening and closing means is operated to increase the cooling efficiency by operating the first and second cooling cylinders. Are moved toward the optical fiber, respectively, to form spaces surrounding the optical fiber. In addition, the connecting means is operated to superimpose the second cooling cylinder on the first cooling cylinder in a straight line, thereby increasing the length.
【００１５】一方、光ファイバの線引き速度が相対的に
遅い場合、光ファイバの過冷却を避ける必要上、開閉手
段を操作して第１および第２の冷却筒の分割片を光ファ
イバの線引き方向に沿って相互に引き離し、上述した空
間にそれぞれ隙間を形成する。また、連結手段を操作し
て第１の冷却筒から第２の冷却筒を引き離し、これら第
１および第２の冷却筒の間に隙間を形成する。On the other hand, when the drawing speed of the optical fiber is relatively slow, it is necessary to avoid overcooling of the optical fiber, and the opening / closing means is operated to move the divided pieces of the first and second cooling cylinders in the drawing direction of the optical fiber. Along each other to form gaps in the above-mentioned spaces. In addition, the connecting means is operated to separate the second cooling cylinder from the first cooling cylinder, and a gap is formed between the first and second cooling cylinders.
【００１６】このようにして、冷媒温度制御手段により
所定の温度に制御された冷媒が冷媒供給手段から各冷却
筒の冷媒通路に供給され、ここを通過する光ファイバの
冷却を行って光ファイバを適当な温度にまで冷却した
後、これを樹脂塗布装置に送り出す。In this way, the refrigerant controlled at a predetermined temperature by the refrigerant temperature control means is supplied from the refrigerant supply means to the refrigerant passages of the respective cooling cylinders, and the optical fibers passing therethrough are cooled to change the optical fibers. After cooling to an appropriate temperature, it is sent to a resin coating device.
【００１７】[0017]
【発明の実施の形態】本発明の第１および第２の形態に
よる光ファイバ冷却装置において、前記光ファイバの線
引き速度を検出する線引き速度検出手段と、この線引き
速度検出手段からの検出情報に基づいて前記連結手段お
よび前記開閉手段の少なくとも一方の作動を制御する制
御装置とをさらに具えるようにしてもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In an optical fiber cooling device according to the first and second embodiments of the present invention, a drawing speed detecting means for detecting a drawing speed of the optical fiber, and information based on detection information from the drawing speed detecting means. And a controller for controlling the operation of at least one of the connecting means and the opening / closing means.
【００１８】同様に、前記樹脂塗布装置に入る前の前記
光ファイバの温度を測定するファイバ温度出手段と、こ
のファイバ温度検出手段からの検出情報に基づいて前記
連結手段および前記開閉手段の少なくとも一方の作動を
制御する制御装置とをさらに具えるようにしてもよい。Similarly, a fiber temperature output means for measuring the temperature of the optical fiber before entering the resin coating device, and at least one of the connection means and the opening / closing means based on detection information from the fiber temperature detection means. And a control device for controlling the operation of.
【００１９】また、前記冷媒供給装置は、前記冷却筒に
供給される冷媒の温度を調整する冷媒温度調整手段をそ
れぞれ有するものであってもよい。この場合、前記光フ
ァイバの線引き方向の下流側に位置する前記冷冷却筒に
通される冷媒ほど低温であることが有効であり、前記光
ファイバの線引き方向に沿った最も下流側に位置する前
記冷却筒に通される冷媒の温度は、０℃以下に設定され
ていることが望ましい。Further, the refrigerant supply device may have a refrigerant temperature adjusting means for adjusting the temperature of the refrigerant supplied to the cooling cylinder. In this case, it is effective that the temperature of the refrigerant passed through the cooling / cooling cylinder located on the downstream side in the drawing direction of the optical fiber is lower, and the refrigerant located on the most downstream side along the drawing direction of the optical fiber is effective. It is desirable that the temperature of the refrigerant passed through the cooling cylinder is set to 0 ° C. or lower.
【００２０】さらに、前記光ファイバと前記冷却筒との
間に伝熱ガスを供給するための伝熱ガス供給手段をさら
に具えるようにしてもよい。この場合、前記伝熱ガス供
給手段は、前記光ファイバの線引き速度に応じて伝熱ガ
スの供給量を制御することが有効である。Further, a heat transfer gas supply means for supplying a heat transfer gas between the optical fiber and the cooling cylinder may be further provided. In this case, it is effective that the heat transfer gas supply means controls the supply amount of the heat transfer gas according to the drawing speed of the optical fiber.
【００２１】[0021]
【実施例】本発明による光ファイバ冷却方法を実現し得
る光ファイバ冷却装置の一実施例について、図１〜図３
を参照しながら詳細に説明する。1 to 3 show an embodiment of an optical fiber cooling device capable of realizing the optical fiber cooling method according to the present invention.
This will be described in detail with reference to FIG.
【００２２】本実施例の概略構造を表す図１に示すよう
に、光ファイバ用母材１１が送り込まれる線引き炉１２
の直下には、本発明の固定の冷却部材としての第一の冷
却器１３と、さらにその下方に位置する本発明の可動の
冷却部材としての第二の冷却器１４とが配置され、線引
き炉１２内にて加熱溶融する光ファイバ用母材１１の下
端部から引き出された高温の光ファイバ１５を室温程度
にまで冷却するようになっている。さらに、第二の冷却
器１４の下方には、光ファイバ１５の外周面に紫外線硬
化樹脂などを少なくとも一層以上被覆するための樹脂塗
布装置１６が設けられており、この樹脂塗布装置１６を
光ファイバ１５が通過する間に、当該樹脂塗布装置１６
内に蓄えられた樹脂１７が光ファイバ１５の外周面に所
定の厚みで塗布されるようになっている。As shown in FIG. 1 showing a schematic structure of this embodiment, a drawing furnace 12 into which an optical fiber preform 11 is fed.
A first cooler 13 as a fixed cooling member of the present invention and a second cooler 14 as a movable cooling member of the present invention located further below the first cooler 13 are disposed immediately below the drawing furnace. The high-temperature optical fiber 15 drawn from the lower end of the optical fiber base material 11 that is heated and melted in the inside 12 is cooled to about room temperature. Further, below the second cooler 14, a resin coating device 16 for coating the outer peripheral surface of the optical fiber 15 with at least one layer of an ultraviolet curable resin or the like is provided. 15 while the resin coating device 16
The resin 17 stored therein is applied to the outer peripheral surface of the optical fiber 15 with a predetermined thickness.
【００２３】前記第二の冷却器１４と樹脂塗布装置１６
との間には、冷却処理後の光ファイバ１５の温度を検出
する温度センサ１８が組み込まれており、この温度セン
サ１８からの検出情報に基づいて冷却器１３, １４の冷
却効率や冷却能力が後述の如く調整される。また、樹脂
塗布装置１６の直下には、光ファイバ１５に塗布された
樹脂１７を硬化させるための樹脂硬化装置１９が設けら
れ、樹脂塗布装置１６から送り出される光ファイバ１５
がこの樹脂硬化装置１９を通過する間に外周面に塗布さ
れた樹脂１７が硬化し、光ファイバ１５に対して樹脂１
７が一体的に接合され、その後、ガイドローラ２０を介
して巻取り装置２１の巻取りドラム２２に巻き取られて
行くようになっている。The second cooler 14 and the resin coating device 16
A temperature sensor 18 for detecting the temperature of the optical fiber 15 after the cooling process is incorporated between them. The cooling efficiency and the cooling capacity of the coolers 13 and 14 are determined based on the detection information from the temperature sensor 18. It is adjusted as described below. A resin curing device 19 for curing the resin 17 applied to the optical fiber 15 is provided directly below the resin coating device 16, and the optical fiber 15 sent out from the resin coating device 16 is provided.
While passing through the resin curing device 19, the resin 17 applied to the outer peripheral surface is cured, and the resin 1 is applied to the optical fiber 15.
7 are integrally joined, and thereafter wound around a winding drum 22 of a winding device 21 via a guide roller 20.
【００２４】本実施例における第一の冷却器１３の主要
部の断面構造を表す図２およびそのIII−III 矢視断面
構造を表す図３に示すように、光ファイバ１５が上下に
貫通するケーシング２３の中央部には、光ファイバ１５
の冷却通路２４を形成する二つ割り構造の金属製の冷却
筒２５ａ, ２５ｂと、これら冷却筒２５ａ, ２５ｂを囲
む二つ割り構造の断熱材２６ａ, ２６ｂとが、図示の如
き密着状態から光ファイバ１５の径方向に相互に分離す
るように、図中、左右方向に移動可能に収納されてい
る。ケーシング２３の外壁には、断熱材２６ａ, ２６ｂ
をこれらと一体の冷却筒２５ａ, ２５ｂと共に光ファイ
バ１５の径方向にケーシング２３に対して移動させるた
めの一対の開閉駆動装置２７ａ, ２７ｂが取り付けら
れ、それぞれ連結ロッド２８ａ, ２８ｂを介して断熱材
２６ａ, ２６ｂに連結されている。As shown in FIG. 2 showing the cross-sectional structure of the main part of the first cooler 13 in this embodiment, and FIG. 3 showing the cross-sectional structure taken along the line III-III of FIG. An optical fiber 15
The metal cooling cylinders 25a, 25b having a split structure forming the cooling passage 24 of the optical fiber 15 and the heat insulating materials 26a, 26b having the split structure surrounding the cooling cylinders 25a, 25b are brought into close contact with each other as shown in FIG. It is housed so as to be movable in the left and right directions in the figure so as to be separated from each other in the directions. Heat insulating materials 26a, 26b are provided on the outer wall of the casing 23.
And a pair of opening / closing driving devices 27a and 27b for moving the optical fiber 15 in the radial direction with respect to the casing 23 together with the cooling cylinders 25a and 25b integrated with these, and a heat insulating material via connecting rods 28a and 28b, respectively. 26a, 26b.
【００２５】従って、開閉駆動装置２７ａ, ２７ｂを作
動させることにより、連結ロッド２８ａ, ２８ｂを介し
て断熱材２６ａ, ２６ｂが冷却筒２５ａ, ２５ｂと共に
左右に移動し、冷却通路２４を閉じたり、あるいはこの
冷却通路２４の側壁部分に隙間が形成されるように開く
ことができる。Therefore, by operating the opening / closing drive devices 27a, 27b, the heat insulating materials 26a, 26b move right and left together with the cooling cylinders 25a, 25b via the connecting rods 28a, 28b, thereby closing the cooling passage 24, or The cooling passage 24 can be opened such that a gap is formed in the side wall portion.
【００２６】前記冷却筒２５ａ, ２５ｂには、冷却通路
２４を囲む複数本（図示例では２本ずつ）の冷媒通路２
９ａ, ２９ｂが冷却通路２４に沿って形成されている。
これら冷媒通路２９ａ, ２９ｂの下端には、ケーシング
２３を貫通して図示しない冷媒供給装置に接続する可撓
性を持った冷媒供給通路３０ａ, ３０ｂがそれぞれ接続
し、これら冷媒通路２９ａ, ２９ｂの上端には、ケーシ
ング２３を貫通する可撓性を持った冷媒排出通路３１
ａ, ３１ｂがそれぞれ連結されている。そして、冷媒供
給装置に組み込まれた図示しない冷媒温度調整装置によ
って所定温度に冷却された冷媒が、この冷媒供給装置の
図示しない冷媒供給ポンプの作動により、冷媒供給通路
３０ａ, ３０ｂから冷媒通路２９ａ, ２９ｂを通って冷
却筒２５ａ, ２５ｂを所定温度に冷却した後、冷媒排出
通路３１ａ, ３１ｂを通って系外に排出されるようにな
っている。A plurality of (two in the illustrated example) refrigerant passages 2 surrounding the cooling passages 24 are provided in the cooling cylinders 25a and 25b.
9 a and 29 b are formed along the cooling passage 24.
Flexible refrigerant supply passages 30a, 30b that penetrate the casing 23 and connect to a refrigerant supply device (not shown) are connected to lower ends of the refrigerant passages 29a, 29b, respectively. Has a flexible refrigerant discharge passage 31 penetrating through the casing 23.
a and 31b are connected to each other. Then, the refrigerant cooled to a predetermined temperature by a refrigerant temperature adjustment device (not shown) incorporated in the refrigerant supply device is moved from the refrigerant supply passages 30a and 30b to the refrigerant passages 29a and 29a by the operation of a refrigerant supply pump (not shown) of the refrigerant supply device. After cooling the cooling cylinders 25a and 25b to a predetermined temperature through 29b, the cooling cylinders 25a and 25b are discharged outside the system through the refrigerant discharge passages 31a and 31b.
【００２７】一方、冷却通路２４の長手方向中央部に
は、この冷却通路２４を挟んで対向する可撓性を持った
一対の伝熱ガス供給通路３２ａ, ３２ｂの一端側が当該
冷却通路２４に連通している。ケーシング２３を貫通す
るこれら伝熱ガス供給通路３２ａ, ３２ｂの他端側に
は、ヘリウムガスなどの熱伝達率の良好な不活性ガスを
蓄えた図示しない伝熱ガス供給装置が連結され、この伝
熱ガス供給装置から伝熱ガス供給通路３２ａ, ３２ｂを
介して供給される伝熱ガスにより、冷却通路２４内がこ
の伝熱ガス雰囲気に保持されるようになっている。On the other hand, one end of a pair of flexible heat transfer gas supply passages 32a and 32b opposed to each other with the cooling passage 24 interposed therebetween communicates with the cooling passage 24 at the longitudinal center of the cooling passage 24. doing. The other end of the heat transfer gas supply passages 32a and 32b penetrating the casing 23 is connected to a heat transfer gas supply device (not shown) storing an inert gas having a good heat transfer coefficient such as helium gas. The heat transfer gas supplied from the hot gas supply device via the heat transfer gas supply passages 32a and 32b keeps the inside of the cooling passage 24 in this heat transfer gas atmosphere.
【００２８】なお、ケーシング２３と第一の冷却器１３
の冷却筒２５ａ, ２５ｂの上端との間には、断熱材２６
ａ, ２６ｂを介在させて冷却筒２５ａ, ２５ｂの保温を
行うようにしているが、冷却筒２５ａ, ２５ｂの下端
は、ケーシング２３の底板部分に当接するまで延設さ
れ、第二の冷却器１４が連結された場合の冷却通路２４
内の冷却効率が高まるように配慮している。The casing 23 and the first cooler 13
Between the upper ends of the cooling cylinders 25a, 25b
Although the cooling tubes 25a and 25b are kept warm by interposing the cooling tubes 25a and 26b, the lower ends of the cooling tubes 25a and 25b are extended until they come into contact with the bottom plate portion of the casing 23. Is connected to the cooling passage 24
Care is taken to increase the cooling efficiency of the interior.
【００２９】前記第二の冷却器１４の基本的な構造は、
上述した第一の冷却器１３とほとんど同じであるが、そ
のケーシング３３と図示しない冷却筒の下端との間に
は、図示しない断熱材を介在させて冷却筒の保温を行う
一方、これら冷却筒の上端はケーシング３３の上板部分
に当接するまで延設され、第二の冷却器１４を第一の冷
却器１３に連結した場合の図示しない冷却通路内の冷却
効率が高まるように配慮している。The basic structure of the second cooler 14 is as follows.
It is almost the same as the first cooler 13 described above, but between the casing 33 and the lower end of a not-shown cooling cylinder, heat insulation of the cooling cylinder is performed by interposing a heat insulating material (not shown). Of the casing 33 is extended until it comes into contact with the upper plate portion of the casing 33. Considering that the cooling efficiency in a cooling passage (not shown) when the second cooler 14 is connected to the first cooler 13 is increased. I have.
【００３０】また、この第二の冷却器１４は、そのケー
シング３３に連結された昇降駆動装置３４により、光フ
ァイバ１５の線引き方向に沿って第一の冷却器１３との
対向方向（図１中、上下方向）に移動可能に支持されて
おり、そのケーシング３３の上端面には、図示しない環
状のシーリングシートが接合されている。昇降駆動装置
３４によって第二の冷却器１４をその上昇端まで第一の
冷却器１３側へ移動した時、第一の冷却器１３のケーシ
ング２３の下端面に接合した環状のシーリングシート３
５と密着し、第一の冷却器１３の冷却通路２４と第二の
冷却器１４の冷却通路とを気密に連通させることができ
るように配慮している。Further, the second cooler 14 is opposed to the first cooler 13 along the drawing direction of the optical fiber 15 (in FIG. 1) by a lifting drive 34 connected to the casing 33. , The upper and lower sides of the casing 33 are joined to an annular sealing sheet (not shown). When the second cooler 14 is moved to the first cooler 13 side by the lifting drive device 34 to its rising end, the annular sealing sheet 3 joined to the lower end surface of the casing 23 of the first cooler 13.
5 so that the cooling passage 24 of the first cooler 13 and the cooling passage of the second cooler 14 can be air-tightly connected.
【００３１】本実施例では、第一および第二の冷却器１
３, １４に供給される冷媒として、例えば−７０℃から
少なくとも室温程度までの範囲で液相となるパーフルオ
ロポリエーテルなどを採用しており、これをそれぞれ−
２０℃に冷却して使用している。このため、各冷却器１
３, １４のケーシング２３, ３３と断熱材２６ａ, ２６
ｂとの間の空間は、それぞれ図示しない乾燥装置によっ
て冷媒の温度よりも低い露点を有する乾燥雰囲気に保持
されており、冷却通路２４で結露が発生しないように配
慮している。In this embodiment, the first and second coolers 1
As the refrigerant supplied to 3, 14, for example, perfluoropolyether or the like which becomes a liquid phase in a range from −70 ° C. to at least about room temperature is adopted.
Used after cooling to 20 ° C. Therefore, each cooler 1
3, 14 casings 23, 33 and heat insulating materials 26a, 26
The space between b and b is maintained in a dry atmosphere having a dew point lower than the temperature of the refrigerant by a drying device (not shown), so that dew condensation does not occur in the cooling passage 24.
【００３２】上述した冷媒供給装置の冷媒供給ポンプや
冷媒温度調整装置、ならびに第一および第二の冷却器１
３, １４の開閉駆動装置２７ａ, ２７ｂ, ３６ａ, ３６
ｂおよび第二の冷却器１４の昇降駆動装置３４は、温度
センサ１８や巻取り装置２１に組み込まれて光ファイバ
１５の線引き速度を検出する線引き速度センサ３７など
からの検出情報に基づき、制御装置３８によってその作
動が制御され、光ファイバ１５の線引き速度が最も低速
の状態では、第一および第二の冷却器１３, １４の冷却
筒２５ａ, ２５ｂの間隔を広げると共に第一および第二
の冷却器１３,１４の間隔を広げ、これよりも光ファイ
バ１５の線引き速度が早い領域では、第一の冷却器１３
の冷却筒２５ａ, ２５ｂを図２および図３に示すように
閉じ、光ファイバ１５の線引き速度がこれよりも高い場
合には、さらに第二の冷却器１４の図示しない冷却筒を
図２および図３に示すように閉じ、光ファイバ１５の線
引き速度が最も高速となる領域では、この状態からさら
に第一の冷却器１３と第二の冷却器１４とを連結状態と
し、樹脂塗布装置１６に送り込まれる光ファイバ１５が
これら冷却器１３, １４を通過する間に、常に３０〜５
０℃程度に冷却されるようにしている。The refrigerant supply pump and the refrigerant temperature control device of the above-described refrigerant supply device, and the first and second coolers 1
3, 14 opening / closing drive devices 27a, 27b, 36a, 36
b and the raising / lowering driving device 34 of the second cooler 14 are controlled by a control device based on detection information from a temperature sensor 18 or a drawing speed sensor 37 incorporated in the winding device 21 to detect a drawing speed of the optical fiber 15. In the state where the drawing speed of the optical fiber 15 is the slowest, the space between the cooling cylinders 25a and 25b of the first and second coolers 13 and 14 is widened and the first and second cooling is performed. In the region where the drawing speed of the optical fiber 15 is faster than this, the first cooler 13
2 and FIG. 3 are closed as shown in FIGS. 2 and 3, and when the drawing speed of the optical fiber 15 is higher than this, the cooling cylinder (not shown) of the second cooler 14 is further moved to FIG. As shown in FIG. 3, in the region where the drawing speed of the optical fiber 15 is the highest, the first cooler 13 and the second cooler 14 are further connected from this state and fed into the resin coating device 16. While the optical fiber 15 passes through the coolers 13 and 14, the
It is designed to be cooled to about 0 ° C.
【００３３】上述した実施例では、第一および第二の冷
却器１３, １４をそれぞれ独立したケーシング２３, ３
３に組み込んだが、これらを乾燥ガスが供給される共通
のケーシング内に組み込み、各ケーシング２３, ３３を
省略することも可能である。この場合、第一および第二
の冷却器１３, １４の何れか一方をこの共通ケーシング
内で昇降させ、これらを連結することができる。In the above-described embodiment, the first and second coolers 13 and 14 are provided with independent casings 23 and 3 respectively.
3, but it is also possible to incorporate them in a common casing to which the drying gas is supplied, and omit the casings 23 and 33. In this case, either one of the first and second coolers 13 and 14 can be moved up and down in the common casing to connect them.
【００３４】次に、冷却器１３, １４の各冷却通路２４
の長さをそれぞれ１ｍに設定した冷却装置により、その
冷却効果を確認すべく、実際の線引き作業を行った場合
について説明する。Next, the cooling passages 24 of the coolers 13 and 14
In the following, a description will be given of a case where an actual drawing operation is performed to confirm the cooling effect of a cooling device having a length of 1 m.
【００３５】ここで、光ファイバ１５の線引き速度を毎
分３００ｍ、各冷却器１３, １４に供給される冷媒の温
度をそれぞれ２０℃とした場合、ヘリウムガスの供給量
と温度センサ１８によって検出される光ファイバ１５の
温度との関係を図４に示す。この結果から明らかなよう
に、光ファイバ１５の線引き速度が毎分３００ｍの場
合、ヘリウムガスを毎分５リットルの割合で供給するこ
とにより、光ファイバ１５に対する冷却効率を飽和させ
ることができることを確認した。Here, when the drawing speed of the optical fiber 15 is 300 m / min, and the temperature of the refrigerant supplied to each of the coolers 13 and 14 is 20 ° C., the supply amount of the helium gas and the temperature sensor 18 are used. FIG. 4 shows the relationship with the temperature of the optical fiber 15. As is clear from this result, when the drawing speed of the optical fiber 15 was 300 m / min, it was confirmed that the cooling efficiency for the optical fiber 15 could be saturated by supplying helium gas at a rate of 5 liters / min. did.
【００３６】そして、各冷却器１３, １４に供給される
冷媒の温度をそれぞれ２０℃に設定すると共にヘリウム
ガスを毎分５リットルの割合で各冷却器１３, １４に供
給し、光ファイバ１５の線引き速度を毎分１００ｍから
上昇させ始めた。この時の光ファイバ１５の線引き速度
と、温度センサ１８によって検出される光ファイバ１５
の温度との関係を図５に示す。この場合、光ファイバ１
５の線引き速度が毎分１５０ｍに達した時点で、第一の
冷却器１３の開閉駆動装置２７ａ, ２７ｂを駆動して冷
却通路２４を形成し、光ファイバ１５の線引き速度が毎
分２５０ｍに達した時点で、第二の冷却器１４の開閉駆
動装置３６ａ, ３６ｂを駆動して冷却通路２４を形成
し、さらに光ファイバ１５の線引き速度が毎分３５０ｍ
に達した時点で、第二の冷却器１４の昇降駆動装置３４
を駆動して第一の冷却器１３と第二の冷却器１４とを連
結した。この連結による冷却効率の向上を認めることが
できるものの、最終的に、毎分４００ｍの線引き速度に
おいて光ファイバ１５の温度が５０℃となり、これ以上
の線引き速度での樹脂１７の安定した塗布ができなかっ
た。Then, the temperature of the refrigerant supplied to each of the coolers 13 and 14 is set to 20 ° C., and helium gas is supplied to each of the coolers 13 and 14 at a rate of 5 liters per minute. The drawing speed was started to increase from 100 m / min. At this time, the drawing speed of the optical fiber 15 and the optical fiber 15 detected by the temperature sensor 18 are determined.
FIG. 5 shows the relationship with the temperature. In this case, the optical fiber 1
When the drawing speed of No. 5 reaches 150 m / min, the opening / closing drive devices 27a and 27b of the first cooler 13 are driven to form the cooling passage 24, and the drawing speed of the optical fiber 15 reaches 250 m / min. At this point, the opening / closing drive devices 36a and 36b of the second cooler 14 are driven to form the cooling passage 24, and the drawing speed of the optical fiber 15 is increased to 350 m / min.
Is reached, the lifting drive 34 of the second cooler 14
To drive the first cooler 13 and the second cooler 14. Although the cooling efficiency can be improved by this connection, the temperature of the optical fiber 15 finally becomes 50 ° C. at a drawing speed of 400 m / min, and the resin 17 can be stably applied at a drawing speed higher than that. Did not.
【００３７】図５に示した実施例では、ヘリウムガスの
供給量を光ファイバ１５の線引き速度に関係なく、一定
に設定したが、第一の冷却器１３および第二の冷却器１
４に対するヘリウムガスの供給量を光ファイバ１５の線
引き速度に応じて図６のように制御した場合の光ファイ
バ１５の線引き速度と、温度センサ１８によって検出さ
れる光ファイバ１５の温度との関係を図７に示す。この
場合、他の条件は図５に示した実施例と全く同じである
が、光ファイバ１５の線引き速度の変化に対する光ファ
イバ１５の温度上昇が先の実施例よりも緩やかにするこ
とができ、安定した冷却効果を得ることができる。In the embodiment shown in FIG. 5, the supply amount of the helium gas is set to be constant irrespective of the drawing speed of the optical fiber 15, but the first cooler 13 and the second cooler 1 are provided.
The relationship between the drawing speed of the optical fiber 15 and the temperature of the optical fiber 15 detected by the temperature sensor 18 when the supply amount of the helium gas to the optical fiber 4 is controlled as shown in FIG. As shown in FIG. In this case, the other conditions are exactly the same as those of the embodiment shown in FIG. 5, but the temperature rise of the optical fiber 15 with respect to the change of the drawing speed of the optical fiber 15 can be made gentler than the previous embodiment. A stable cooling effect can be obtained.
【００３８】図５〜図７に示した２つの実施例では、冷
媒の温度を２０℃に設定しているが、第二の冷却器１４
に供給される冷媒の温度を例えば、−３０℃に設定する
ことにより、さらに線引き速度を高速にすることが可能
となる。In the two embodiments shown in FIGS. 5 to 7, the temperature of the refrigerant is set at 20 ° C.
By setting the temperature of the refrigerant to be supplied to, for example, −30 ° C., it is possible to further increase the drawing speed.
【００３９】このような実施例における第一の冷却器１
３および第二の冷却器１４に対するヘリウムガスの供給
量を光ファイバ１５の線引き速度に応じて図８のように
制御した場合の光ファイバ１５の線引き速度と、温度セ
ンサ１８によって検出される光ファイバ１５の温度との
関係を図９に示す。この場合、光ファイバ１５の線引き
速度が毎分４７５ｍに達した時点で、第一の冷却器１３
と第二の冷却器１４との連結を行った以外は、先の実施
例と同じ条件で線引き作業を行った。本実施例において
も、第一の冷却器１３と第二の冷却器１４との連結によ
る冷却効率の向上を認めることができ、最終的に、光フ
ァイバ１５の温度が５０℃となる毎分６００ｍの線引き
速度まで樹脂１７を安定して塗布することができた。The first cooler 1 in such an embodiment
The drawing speed of the optical fiber 15 when the supply amount of the helium gas to the third and second coolers 14 is controlled as shown in FIG. 8 according to the drawing speed of the optical fiber 15 and the optical fiber detected by the temperature sensor 18 FIG. 9 shows the relationship with the temperature of No. 15. In this case, when the drawing speed of the optical fiber 15 reaches 475 m / min, the first cooler 13
A wire drawing operation was performed under the same conditions as in the previous embodiment, except that the connection between the first cooler 14 and the second cooler 14 was performed. Also in this embodiment, it can be seen that the cooling efficiency is improved by connecting the first cooler 13 and the second cooler 14, and finally, the temperature of the optical fiber 15 becomes 50 ° C. and 600 m / min. The resin 17 could be stably applied up to the drawing speed of.
【００４０】[0040]
【発明の効果】本発明によると、複数段の冷却筒を連結
手段によって相互に直接連結するようにしたので、光フ
ァイバに対する冷却効率を調整して樹脂塗布装置に送り
出される光ファイバを常に適正な温度に冷却することが
できる。しかも、連結部分での内部伝熱ガスの流れが乱
れず、光ファイバの品質を損なうことなく、効率良く光
ファイバを冷却することができる。According to the present invention, the plurality of cooling cylinders are directly connected to each other by the connecting means, so that the cooling efficiency for the optical fiber is adjusted so that the optical fiber sent to the resin coating apparatus can always be properly adjusted. Can be cooled to temperature. Moreover, the flow of the internal heat transfer gas at the connection portion is not disturbed, and the optical fiber can be efficiently cooled without deteriorating the quality of the optical fiber.
【００４１】また、開閉手段によって光ファイバとの対
向方向に移動可能な複数の分割片で冷却筒を構成したの
で、光ファイバに対する冷却効率を調整して樹脂塗布装
置に送り出される光ファイバを常に適正な温度に冷却す
ることができる。しかも、冷却筒に光ファイバを通す際
の手間が掛からず、作業性の向上が可能である。Further, since the cooling cylinder is constituted by a plurality of divided pieces movable in the direction facing the optical fiber by the opening / closing means, the cooling efficiency for the optical fiber is adjusted so that the optical fiber sent to the resin coating apparatus is always suitable. It can be cooled to a suitable temperature. In addition, it is not necessary to pass the optical fiber through the cooling cylinder, and the workability can be improved.
【００４２】さらに、冷却筒を直列に複数並べ、それぞ
れ独立して冷媒を供給するようにしたので、光ファイバ
の線引き方向下流側の冷媒ほど低温に設定することによ
り、冷媒通路の合計長さを従来と同じに設定しても効率
良く光ファイバを冷却することが可能であり、例え光フ
ァイバの線引き速度が高速であってもこれを適正な温度
にまで冷却することができる。Further, since a plurality of cooling cylinders are arranged in series and the refrigerant is supplied independently of each other, the lower the temperature of the refrigerant, the lower the refrigerant in the drawing direction of the optical fiber, so that the total length of the refrigerant passage is reduced. The optical fiber can be efficiently cooled even if it is set in the same manner as in the related art. Even if the drawing speed of the optical fiber is high, it can be cooled to an appropriate temperature.
【図１】本発明方法を実現し得る本発明による光ファイ
バ冷却装置の一実施例の概略構造を表す概念図である。FIG. 1 is a conceptual diagram showing a schematic structure of an embodiment of an optical fiber cooling device according to the present invention capable of realizing the method of the present invention.
【図２】図１に示した実施例における第一の冷却器の概
略構造を表す断面図である。FIG. 2 is a sectional view showing a schematic structure of a first cooler in the embodiment shown in FIG.
【図３】図２中の III−III 矢視断面図である。FIG. 3 is a sectional view taken along the line III-III in FIG. 2;
【図４】線引き速度を毎分３００ｍに設定した場合の伝
熱ガスの供給流量と光ファイバの温度との関係を表すグ
ラフである。FIG. 4 is a graph showing the relationship between the supply flow rate of the heat transfer gas and the temperature of the optical fiber when the drawing speed is set to 300 m / min.
【図５】光ファイバの線引き速度と光ファイバの温度と
の関係を表すグラフである。FIG. 5 is a graph showing the relationship between the drawing speed of the optical fiber and the temperature of the optical fiber.
【図６】光ファイバの線引き速度と伝熱ガスの供給流量
との関係の一例を表すグラフである。FIG. 6 is a graph showing an example of a relationship between a drawing speed of an optical fiber and a supply flow rate of a heat transfer gas.
【図７】図６に示した条件における光ファイバの線引き
速度と光ファイバの温度との関係を表すグラフである。7 is a graph showing the relationship between the drawing speed of the optical fiber and the temperature of the optical fiber under the conditions shown in FIG.
【図８】光ファイバの線引き速度と伝熱ガスの供給量と
の関係の一例を表すグラフである。FIG. 8 is a graph illustrating an example of a relationship between a drawing speed of an optical fiber and a supply amount of a heat transfer gas.
【図９】図８に示した条件における光ファイバの線引き
速度と光ファイバの温度との関係を表すグラフである。9 is a graph showing the relationship between the drawing speed of the optical fiber and the temperature of the optical fiber under the conditions shown in FIG.
１１ 光ファイバ用母材 １２ 線引き炉 １３ 第一の冷却器 １４ 第二の冷却器 １５ 光ファイバ １６ 樹脂塗布装置 １７ 樹脂 １８ 温度センサ １９ 樹脂硬化装置 ２０ ガイドローラ ２１ 巻取り装置 ２２ 巻取りドラム ２３ ケーシング ２４ 冷却通路 ２５ａ, ２５ｂ 冷却筒 ２６ａ, ２６ｂ 断熱材 ２７ａ, ２７ｂ 開閉駆動装置 ２８ａ, ２８ｂ 連結ロッド ２９ａ, ２９ｂ 冷媒通路 ３０ａ, ３０ｂ 冷媒供給通路 ３１ａ, ３１ｂ 冷媒排出通路 ３２ａ, ３２ｂ 伝熱ガス供給通路 ３３ ケーシング ３４ 昇降駆動装置 ３５ シーリングシート ３６ａ, ３６ｂ 開閉駆動装置 ３７ 線引き速度センサ ３８ 制御装置 DESCRIPTION OF SYMBOLS 11 Base material for optical fibers 12 Drawing furnace 13 First cooler 14 Second cooler 15 Optical fiber 16 Resin coating device 17 Resin 18 Temperature sensor 19 Resin curing device 20 Guide roller 21 Winding device 22 Winding drum 23 Casing 24 Cooling passage 25a, 25b Cooling cylinder 26a, 26b Heat insulating material 27a, 27b Opening / closing drive device 28a, 28b Connecting rod 29a, 29b Refrigerant passage 30a, 30b Refrigerant supply passage 31a, 31b Refrigerant discharge passage 32a, 32b Heat transfer gas supply passage 33 Casing 34 Elevating drive device 35 Sealing sheet 36a, 36b Opening / closing drive device 37 Drawing speed sensor 38 Control device
Claims (9)
炉と、この線引き炉ら引き出される光ファイバに樹脂を
塗布するための樹脂塗布装置との間に設けられて前記光
ファイバを冷却するための冷却装置であって、 前記光ファイバに沿って配設されて前記光ファイバをそ
れぞれ囲む複数段の冷却筒と、 これら冷却筒にそれぞれ設けられて当該冷却筒内に冷媒
を通す冷媒通路と、 これら冷媒通路に冷媒をそれぞれ供給するための冷媒供
給装置と、 個々の前記冷却筒に供給される冷媒の温度をそれぞれ制
御する冷媒温度制御手段と、 前記複数段の冷却筒を前記光ファイバに沿って移動して
これらを相互に連結するための連結手段とを具え、前記
冷却筒は、それぞれ前記光ファイバとの対向方向に移動
可能に複数に分割した複数の分割片で構成され、これら
複数の分割片を前記光ファイバとの対向方向に駆動する
ための開閉手段をさらに具えたことを特徴とする光ファ
イバ冷却装置。1. A cooling apparatus for cooling an optical fiber which is provided between a drawing furnace for heating and melting an optical fiber base material and a resin coating device for applying a resin to an optical fiber drawn from the drawing furnace. A plurality of cooling cylinders arranged along the optical fiber and surrounding the optical fiber, respectively, a refrigerant passage provided in each of these cooling cylinders and passing a refrigerant through the cooling cylinder, A refrigerant supply device for supplying a refrigerant to each of the refrigerant passages; a refrigerant temperature control unit for controlling a temperature of the refrigerant supplied to each of the cooling cylinders; And a connecting means for connecting the optical fiber and the cooling fiber to each other. The cooling cylinder is constituted by a plurality of divided pieces each of which can be moved in a direction facing the optical fiber. , Optical fiber cooling apparatus, characterized in that it further comprises a switching means for driving the plurality of divided pieces in the opposite direction with the optical fiber.
炉と、この線引き炉から引き出される光ファイバに樹脂
を塗布するための樹脂塗布装置との間に設けられて前記
光ファイバを冷却するための冷却装置であって、 前記光ファイバを囲む第１の冷却筒と、 前記光ファイバに沿って配設されて前記光ファイバを囲
む少なくとも１つの第２の冷却筒と、 これら第１および第２の冷却筒にそれぞれ設けられて当
該冷却筒内に冷媒を通す冷媒通路と、 これら冷媒通路に冷媒をそれぞれ供給するための冷媒供
給装置と、 前記第２の冷却筒を前記光ファイバに沿って移動して前
記第１の冷却筒と共に相互に連結するための連結手段と
を具え、前記冷却筒は、それぞれ前記光ファイバとの対
向方向に移動可能に複数に分割した複数の分割片で構成
され、これら複数の分割片を前記光ファイバとの対向方
向に駆動するための開閉手段をさらに具えたことを特徴
とする光ファイバ冷却装置。2. A cooling furnace for cooling an optical fiber, which is provided between a drawing furnace for heating and melting an optical fiber base material and a resin coating device for applying a resin to an optical fiber drawn from the drawing furnace. A first cooling cylinder surrounding the optical fiber; at least one second cooling cylinder disposed along the optical fiber and surrounding the optical fiber; A refrigerant passage provided in each of the cooling cylinders and allowing the refrigerant to pass through the cooling cylinder; a refrigerant supply device for supplying the refrigerant to each of the refrigerant passages; and moving the second cooling cylinder along the optical fiber. Connecting means for interconnecting the first cooling cylinder and the first cooling cylinder, the cooling cylinder is constituted by a plurality of divided pieces movably divided in a direction facing the optical fiber, respectively, Optical fiber cooling apparatus, characterized in that it further comprises a switching means for driving the these plurality of divided pieces in the opposite direction with the optical fiber.
線引き速度検出手段と、この線引き速度検出手段からの
検出情報に基づいて前記連結手段および前記開閉手段の
少なくとも一方の作動を制御する制御装置とをさらに具
えたことを特徴とする請求項１または請求項２に記載の
光ファイバ冷却装置。3. A drawing speed detecting means for detecting a drawing speed of the optical fiber, and a control device for controlling at least one of the connecting means and the opening / closing means based on detection information from the drawing speed detecting means. The optical fiber cooling device according to claim 1 or 2, further comprising:
イバの温度を測定するファイバ温度出手段と、このファ
イバ温度検出手段からの検出情報に基づいて前記連結手
段および前記開閉手段の少なくとも一方の作動を制御す
る制御装置とをさらに具えたことを特徴とする請求項１
または請求項２に記載の光ファイバ冷却装置。4. A fiber temperature output means for measuring the temperature of the optical fiber before entering the resin coating device, and at least one of the connection means and the opening / closing means based on detection information from the fiber temperature detection means. 2. The apparatus according to claim 1, further comprising a control device for controlling the operation.
Or the optical fiber cooling device according to claim 2.
される冷媒の温度を調整する冷媒温度調整手段をそれぞ
れ有することを特徴とする請求項１から請求項４の何れ
かに記載の光ファイバ冷却装置。5. The light according to claim 1, wherein the refrigerant supply device has a refrigerant temperature adjusting means for adjusting a temperature of the refrigerant supplied to the cooling cylinder. Fiber cooling device.
位置する前記冷却筒に通される冷媒ほど低温であること
を特徴とする請求項５に記載の光ファイバ冷却装置。6. The optical fiber cooling device according to claim 5, wherein the temperature of the refrigerant passing through the cooling cylinder located on the downstream side in the drawing direction of the optical fiber is lower.
も下流側に位置する前記冷却筒に通される冷媒の温度
は、０℃以下に設定されていることを特徴とする請求項
６に記載の光ファイバ冷却装置。7. The temperature of the cooling medium passed through the cooling cylinder located at the most downstream side along the drawing direction of the optical fiber is set to 0 ° C. or less. Optical fiber cooling device.
熱ガスを供給するための伝熱ガス供給手段をさらに具え
たことを特徴とする請求項１から請求項７の何れかに記
載の光ファイバ冷却装置。8. The apparatus according to claim 1, further comprising a heat transfer gas supply means for supplying a heat transfer gas between said optical fiber and said cooling tube. Optical fiber cooling device.
バの線引き速度に応じて伝熱ガスの供給量を制御するも
のであることを特徴とする請求項８に記載の光ファイバ
冷却装置。9. The optical fiber cooling device according to claim 8, wherein said heat transfer gas supply means controls a supply amount of the heat transfer gas in accordance with a drawing speed of said optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06801597A JP3377164B2 (en) | 1997-03-21 | 1997-03-21 | Optical fiber cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06801597A JP3377164B2 (en) | 1997-03-21 | 1997-03-21 | Optical fiber cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10259036A true JPH10259036A (en) | 1998-09-29 |
| JP3377164B2 JP3377164B2 (en) | 2003-02-17 |
Family
ID=13361591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06801597A Expired - Lifetime JP3377164B2 (en) | 1997-03-21 | 1997-03-21 | Optical fiber cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3377164B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1076045A2 (en) * | 1999-08-09 | 2001-02-14 | Lucent Technologies Inc. | Apparatus for cooling an optical fibre drawn from a preform |
| EP1112977A1 (en) * | 1999-12-30 | 2001-07-04 | Alcatel | Process for cooling an optical fibre during drawing |
| EP1112976A1 (en) * | 1999-12-30 | 2001-07-04 | Alcatel | Process for cooling an optical fibre during drawing |
| WO2003080523A3 (en) * | 2002-03-25 | 2004-09-30 | Air Liquide | Method and apparatus for cooling of optical fiber |
| JP2012006797A (en) * | 2010-06-25 | 2012-01-12 | Sumitomo Electric Ind Ltd | Method for producing optical fiber |
| JP2015071505A (en) * | 2013-10-02 | 2015-04-16 | 住友電気工業株式会社 | Manufacturing method and manufacturing apparatus for optical fiber |
| WO2015099489A1 (en) * | 2013-12-27 | 2015-07-02 | 대한광통신 주식회사 | Ultra-low-loss optical fiber, and method and apparatus for producing same |
| CN107056043A (en) * | 2017-05-09 | 2017-08-18 | 江苏亨通光纤科技有限公司 | A kind of optical fibre cooling tube with automatic centering, cleaning function |
| JP2019108232A (en) * | 2017-12-15 | 2019-07-04 | 住友電気工業株式会社 | Cooler used for apparatus for drawing optical fiber |
| CN112456786A (en) * | 2019-09-09 | 2021-03-09 | 住友电气工业株式会社 | Method for manufacturing optical fiber and optical fiber cooling device |
| JP2021183552A (en) * | 2020-05-22 | 2021-12-02 | 住友電気工業株式会社 | Device for cooling optical fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1076045A2 (en) * | 1999-08-09 | 2001-02-14 | Lucent Technologies Inc. | Apparatus for cooling an optical fibre drawn from a preform |
| EP1076045A3 (en) * | 1999-08-09 | 2001-05-16 | Lucent Technologies Inc. | Apparatus for cooling an optical fibre drawn from a preform |
| EP1112977A1 (en) * | 1999-12-30 | 2001-07-04 | Alcatel | Process for cooling an optical fibre during drawing |
| EP1112976A1 (en) * | 1999-12-30 | 2001-07-04 | Alcatel | Process for cooling an optical fibre during drawing |
| FR2803288A1 (en) * | 1999-12-30 | 2001-07-06 | Cit Alcatel | METHOD OF COOLING AN OPTICAL FIBER DURING FIBRATION |
| FR2803287A1 (en) * | 1999-12-30 | 2001-07-06 | Cit Alcatel | METHOD OF COOLING AN OPTICAL FIBER DURING FIBRATION |
| US6565775B2 (en) | 1999-12-30 | 2003-05-20 | Alcatel | Method of cooling an optical fiber while it is being drawn |
| US6576164B2 (en) | 1999-12-30 | 2003-06-10 | Alcatel | Method of cooling an optical fiber while it is being drawn |
| WO2003080523A3 (en) * | 2002-03-25 | 2004-09-30 | Air Liquide | Method and apparatus for cooling of optical fiber |
| JP2012006797A (en) * | 2010-06-25 | 2012-01-12 | Sumitomo Electric Ind Ltd | Method for producing optical fiber |
| JP2015071505A (en) * | 2013-10-02 | 2015-04-16 | 住友電気工業株式会社 | Manufacturing method and manufacturing apparatus for optical fiber |
| WO2015099489A1 (en) * | 2013-12-27 | 2015-07-02 | 대한광통신 주식회사 | Ultra-low-loss optical fiber, and method and apparatus for producing same |
| KR20150077363A (en) * | 2013-12-27 | 2015-07-07 | 대한광통신 주식회사 | Optical fiber having extremely low loss and method and apparatus for manufacturing the same |
| US9726815B2 (en) | 2013-12-27 | 2017-08-08 | Taihan Fiberoptics Co., Ltd. | Ultra-low-loss optical fiber, and method and apparatus for producing same |
| CN107056043A (en) * | 2017-05-09 | 2017-08-18 | 江苏亨通光纤科技有限公司 | A kind of optical fibre cooling tube with automatic centering, cleaning function |
| JP2019108232A (en) * | 2017-12-15 | 2019-07-04 | 住友電気工業株式会社 | Cooler used for apparatus for drawing optical fiber |
| CN112456786A (en) * | 2019-09-09 | 2021-03-09 | 住友电气工业株式会社 | Method for manufacturing optical fiber and optical fiber cooling device |
| JP2021042096A (en) * | 2019-09-09 | 2021-03-18 | 住友電気工業株式会社 | Method for manufacturing optical fiber and optical fiber cooler |
| CN112456786B (en) * | 2019-09-09 | 2024-04-30 | 住友电气工业株式会社 | Optical fiber manufacturing method and optical fiber cooling device |
| JP2021183552A (en) * | 2020-05-22 | 2021-12-02 | 住友電気工業株式会社 | Device for cooling optical fiber |
| CN114156720A (en) * | 2021-11-12 | 2022-03-08 | 中国工程物理研究院上海激光等离子体研究所 | Cabling type gain optical fiber temperature control system |
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