JP2011173733A - Extended tube for spinning machine and spinning machine - Google Patents

Extended tube for spinning machine and spinning machine Download PDF

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Publication number
JP2011173733A
JP2011173733A JP2010036781A JP2010036781A JP2011173733A JP 2011173733 A JP2011173733 A JP 2011173733A JP 2010036781 A JP2010036781 A JP 2010036781A JP 2010036781 A JP2010036781 A JP 2010036781A JP 2011173733 A JP2011173733 A JP 2011173733A
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slow cooling
extension pipe
cooling extension
heating furnace
spinning machine
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JP2011173733A5 (en
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Ryuichi Nishino
龍一 西野
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Fujikura Ltd
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Fujikura Ltd
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    • 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
    • C03B37/02727—Annealing or re-heating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/56—Annealing or re-heating the drawn fibre prior to coating

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extended tube for a spinning machine improving the airtightness of the extended tube for annealing installed under a heating furnace to the heating furnace or an adaptor, and the fiber cutting performance under the heating furnace by simply removing and contracting the extended tube for annealing, and to provide the spinning machine. <P>SOLUTION: The hollow extended tube for annealing (a first extended tube 24 for annealing and a second extended tube 26 for annealing) is provided in the lower part of the heating furnace 10 for heating an optical fiber preform to pass an optical fiber 14 drawn downward from the heating furnace 10 through the hollow of the extended tube for annealing to anneal. The extended tube for annealing is constituted so as to have the first extended tube 24 for annealing which is provided with flanges 24b and 24c respectively at the upper end and lower end of a bellows type bendable and flexible body 24a and the second extended tube 26 for annealing which is provided with flanges 26b and 26c respectively at the upper end and the lower end of the tubular body 26a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は光ファイバの製造に用いられる紡糸機用延長管及び紡糸機に関し、特に加熱炉の下に設置した徐冷用延長管及び紡糸機に関する。   The present invention relates to an extension pipe for a spinning machine and a spinning machine used for manufacturing an optical fiber, and more particularly to an extension pipe for slow cooling and a spinning machine installed under a heating furnace.

従来から使用される、光ファイバの紡糸機は、図４（ａ）に示すように、加熱炉１０内に光ファイバ母材１２を上方から挿入し、当該母材１２をヒータ１０ａの熱で加熱して熔融させ、熔融した母材１２から細く引き出された光ファイバ１４の先端１４ａを図示しない引取機によって引取ることにより、光ファイバ１４を連続的に製造している。加熱炉１０の外壁部１０ｂ内に断熱材１０ｃが装填されてヒータ１０ａ発生熱が逃げないようにしている。   As shown in FIG. 4A, an optical fiber spinning machine conventionally used inserts an optical fiber preform 12 into the heating furnace 10 from above, and heats the preform 12 with the heat of the heater 10a. Then, the optical fiber 14 is continuously manufactured by taking out the tip 14a of the optical fiber 14 that has been melted and drawn out of the melted base material 12 with a take-up machine (not shown). A heat insulating material 10c is loaded in the outer wall portion 10b of the heating furnace 10 so that the heat generated by the heater 10a does not escape.

加熱炉１０の下方には、熔融後で高温の光ファイバ１４を内部に通して徐冷する徐冷用延長管１６が設けられて、当該延長管１６内にガスや空気を吹き込む等して徐冷している（特開２００４−１５５６１０号（特許文献１）、特開平１０−１９４７７０号（特許文献２））。   Below the heating furnace 10, there is provided an extension tube 16 for slow cooling that gradually cools by passing a high-temperature optical fiber 14 after melting, and is gradually added by blowing gas or air into the extension tube 16. It is cooled (Japanese Patent Application Laid-Open No. 2004-155610 (Patent Document 1), Japanese Patent Application Laid-Open No. 10-194770 (Patent Document 2)).

この種の徐冷用延長管１６は、管本体１６ａの上端・下端にフランジ１６ｂ・１６ｃが形成されている。加熱炉１０の下部のネジ部１０ｄ（雌ネジが形成）内に上部１８ａ（雄ネジが形成）がねじ込まれてアダプタ１８が固定される。そして、そのアダプタ１８の下部には、上記ネジ部１０ｄと同様の雌ネジ穴が形成されている。加熱炉１０下面とアダプタ１８間と、アダプタ１８と徐冷用延長管１６のフランジ間はＯ（オー）リング等によってシールをしている。   In this type of slow cooling extension pipe 16, flanges 16b and 16c are formed at the upper and lower ends of the pipe body 16a. The adapter 18 is fixed by screwing an upper portion 18a (formed with a male screw) into a screw portion 10d (formed with a female screw) at the lower portion of the heating furnace 10. And the female screw hole similar to the said screw part 10d is formed in the lower part of the adapter 18. FIG. Sealing between the lower surface of the heating furnace 10 and the adapter 18 and between the adapter 18 and the flange of the slow cooling extension pipe 16 is performed by an O (O) ring or the like.

図４（ｂ）に示すように、徐冷用延長管１６の上端のフランジ１６ｂには、上方に向けて突出した筒状部の外周に雄ネジ１６ｄが形成されている。   As shown in FIG. 4B, the flange 16b at the upper end of the slow cooling extension pipe 16 is formed with a male screw 16d on the outer periphery of the cylindrical portion protruding upward.

前記アダプタ１８下部の雌ネジ穴に、下方から前記上端フランジ１６ｂの筒状に突出した雄ネジ１６ｄを螺合して固定することによって、アダプタ１８（上記加熱炉１０）に前記徐冷用延長管１６を接続し固定する。   The slow cooling extension pipe is fitted to the adapter 18 (the heating furnace 10) by screwing and fixing the male screw 16d protruding in a cylindrical shape of the upper end flange 16b from below into the female screw hole below the adapter 18. 16 is connected and fixed.

このように徐冷用延長管１６は、アダプタ１８の下部にフランジ１６ｂの雄ネジ１６ｄをねじ込んで固定するため、前記徐冷用延長管１６が曲がりがあった場合に、その曲がりを修正して前記徐冷用延長管１６を芯出し（位置調整等）する必要がある。しかしながら、下記のような問題があるため、芯出しが困難であった。   In this way, the slow cooling extension pipe 16 is fixed by screwing the male screw 16d of the flange 16b into the lower part of the adapter 18, so that when the slow cooling extension pipe 16 is bent, the bending is corrected. The slow cooling extension tube 16 needs to be centered (position adjustment, etc.). However, centering is difficult due to the following problems.

すなわち、徐冷用延長管１６の芯出しのため、例えば図４に示すように、徐冷用延長管１６の反固定側の自由端について、水平に沿うＸ・Ｙ方向の四方からネジ２２ａ、２２ａ…によって押圧する調芯治具２２を設けている。図４の（ｃ）は鉛直方向から見た調芯治具であり、符号２２ｂ、２２ｂで示すフレームは所冷用延長管１６を挟むように位置して、フレーム２２ｂ、２２ｂに螺合させたネジ２２ａ、２２ａ…を徐冷用延長管１６に当接させている。符号２２ｃは調芯治具２２を取り付けるベースである。
調芯時には、この調芯治具２２のネジ２２ａ、２２ａ…を回してその先端位置を調整することによって、上記徐冷延長管１６の自由端をＸ・Ｙ方向に適切に振って曲げる（曲げられた徐冷用延長管１６を破線で示す）等して芯出ししており、当該徐冷用延長管１６の曲げが大きいと、加熱炉１０、アダプタ１８、フランジ１６ｂの雄ネジ部１６ｄ等のネジ部適所に設けられたシール部分が歪むなどして加熱炉１０や徐冷用延長管１６の内部の気密が不良になって内部ガスが漏れ出す虞があった。 That is, for centering the slow cooling extension tube 16, for example, as shown in FIG. 4, the screw 22a from the four sides in the X and Y directions along the horizontal direction of the free end on the anti-fixing side of the slow cooling extension tube 16 is provided. An aligning jig 22 that is pressed by 22a... Is provided. FIG. 4C shows an alignment jig viewed from the vertical direction. The frames indicated by reference numerals 22b and 22b are positioned so as to sandwich the extension tube 16 for cooling, and are screwed into the frames 22b and 22b. The screws 22a, 22a ... are brought into contact with the slow cooling extension pipe 16. Reference numeral 22c denotes a base to which the alignment jig 22 is attached.
At the time of alignment, the free end of the slow cooling extension tube 16 is appropriately shaken in the X and Y directions and bent by turning the screws 22a, 22a... If the bending of the slow cooling extension pipe 16 is large, the heating furnace 10, the adapter 18, the male threaded portion 16d of the flange 16b, etc. There is a possibility that the seal portion provided at an appropriate position of the screw portion is distorted and the inside of the heating furnace 10 and the slow cooling extension pipe 16 becomes poor and the internal gas leaks.

設置された徐冷用延長管１６の曲げの原因としては、
（１）加熱炉１０下部のネジ部１０ｄが垂直方向に沿うように形成されていない場合。
（２）徐冷用延長管１６は、管本体１６ａにフランジ１６ｂ・１６ｃを溶接して製作しており、この際に、フランジ１６ｂ・１６ｃが管本体１６ａに対して曲がり（歪み）が生じた場合が挙げられる。 As a cause of bending of the installed extension pipe 16 for slow cooling,
(1) The case where the screw portion 10d at the bottom of the heating furnace 10 is not formed along the vertical direction.
(2) The slow cooling extension pipe 16 is manufactured by welding the flanges 16b and 16c to the pipe body 16a. At this time, the flanges 16b and 16c are bent (distorted) with respect to the pipe body 16a. There are cases.

また、徐冷用延長管１６がアダプタ１８とネジ込み接続（固定）する構造であるので、当該徐冷用延長管１６をアダプタ１８から外して空間を空けて、加熱炉１０下部付近で光ファイバ１４を切断できず、作業性向上の障害になるという解決すべき課題もある。   Further, since the slow cooling extension pipe 16 is connected to the adapter 18 by screwing (fixing), the slow cooling extension pipe 16 is removed from the adapter 18 to make a space, and an optical fiber near the lower portion of the heating furnace 10. There is also a problem to be solved that 14 cannot be cut and becomes an obstacle to improving workability.

特開２００４−１５５６１０号JP 2004-155610 A 特開平１０−１９４７７０号JP-A-10-194770

本発明は、斯かる実情に鑑み、加熱炉の下に設置される徐冷用延長管の加熱炉やアダプタに対する気密性及び徐冷用延長管を簡単に外して縮め加熱炉の下でのファイバ切断性を向上できる紡糸機用延長管及び紡糸機を提供しようとするものである。   In view of such a situation, the present invention provides a fiber under a heating furnace that is obtained by simply removing the airtightness of the slow cooling extension pipe installed under the heating furnace from the heating furnace and the adapter and the slow cooling extension pipe. It is an object of the present invention to provide an extension tube for a spinning machine and a spinning machine that can improve the cutting performance.

本発明は、光ファイバ母材を加熱する加熱炉下部に中空の徐冷用延長管を設け、該加熱炉から下方に向けて引き出された光ファイバを前記中空内に通して徐冷する光ファイバの紡糸機において、
前記中空の徐冷用延長管は、伸縮かつ屈曲が可能な概略筒状の本体を設けた第１の徐冷用延長管と、管状の本体を設けた第２の徐冷用延長管とを有し、
前記第１の徐冷用延長管を加熱炉下部に接続し、前記第１の徐冷用延長管の下部に前記第２の徐冷用延長管を接続したことを特徴とする紡糸機溶延長管である。 The present invention provides an optical fiber which is provided with a hollow slow cooling extension tube at the lower part of a heating furnace for heating an optical fiber preform, and gradually cools the optical fiber drawn downward from the heating furnace through the hollow. In the spinning machine
The hollow slow cooling extension pipe includes a first slow cooling extension pipe provided with a substantially cylindrical main body capable of expansion and contraction and bending, and a second slow cooling extension pipe provided with a tubular main body. Have
The first slow cooling extension pipe is connected to the lower part of the heating furnace, and the second slow cooling extension pipe is connected to the lower part of the first slow cooling extension pipe. It is a tube.

本発明においては、前記加熱炉下部に中空のアダプタを設け、このアダプタの下部に前記第１の徐冷用延長管の上端を別体のネジによってネジ結合し、
前記第１の徐冷用延長管の下端に、第２の徐冷用延長管の上端を別体のネジによってネジ結合したことが好適である。 In the present invention, a hollow adapter is provided at the lower part of the heating furnace, and the upper end of the first slow cooling extension pipe is screwed to the lower part of the adapter with a separate screw,
It is preferable that the upper end of the second slow cooling extension pipe is screwed to the lower end of the first slow cooling extension pipe with a separate screw.

本発明においては、第２の徐冷用延長管に、その本体を側方から支持しかつ芯出しをするため移動可能にする延長管用ブラケットを設けたことが好適である。   In the present invention, it is preferable that the second slow cooling extension pipe is provided with an extension pipe bracket that supports the main body from the side and is movable for centering.

本発明においては、アダプタは上端および下端にフランジが設けられ、上端のフランジを加熱炉下部に当接して取り付け、下端のフランジを第１の徐冷用延長管の上端のフランジに別体のネジによってネジ結合することが好適である。   In the present invention, the adapter is provided with flanges at the upper end and lower end, the upper end flange is attached to the lower part of the heating furnace, and the lower end flange is attached to the upper end flange of the first slow cooling extension pipe as a separate screw. It is preferable that the screw connection is performed.

本発明は、上記記載の紡糸機用延長管を用いたことを特徴とする光ファイバの紡糸機である。   The present invention is an optical fiber spinning machine using the above-described spinning tube extension pipe.

本発明の紡糸機用延長管及び紡糸機によれば、中空の徐冷用延長管を、伸縮かつ屈曲が可能な概略筒状の本体（例えばベローズ状または互いに摺接する多重管等）を設けた第１の徐冷用延長管と、管状の本体を設けた第２の徐冷用延長管とを有し、前記第１の徐冷用延長管を加熱炉下部に接続し、前記第１の徐冷用延長管の下部に前記第２の徐冷用延長管を接続したものとしたので、上記第１の徐冷用延長管の概略筒状の本体を伸縮や屈曲ができ、これによって、第１の徐冷用延長管及び第２の徐冷用延長管を芯出しする際に振り回しやすくかつ第１の徐冷用延長管または第２の徐冷用延長管自体をこじることが無いので、気密性の低下を確実に防止できる。   According to the extension tube for a spinning machine and the spinning machine of the present invention, the hollow slow cooling extension tube is provided with a substantially cylindrical main body (for example, a bellows shape or multiple tubes that are in sliding contact with each other). A first slow cooling extension pipe and a second slow cooling extension pipe provided with a tubular main body, the first slow cooling extension pipe connected to a lower part of a heating furnace, and the first slow cooling extension pipe Since the second slow cooling extension pipe is connected to the lower part of the slow cooling extension pipe, the substantially cylindrical body of the first slow cooling extension pipe can be expanded and contracted, Since the first slow cooling extension tube and the second slow cooling extension tube are easily centered, the first slow cooling extension tube or the second slow cooling extension tube itself is not damaged. It is possible to reliably prevent a decrease in airtightness.

なお、加熱炉下部に設けた中空のアダプタの下部に前記第１の徐冷用延長管の上端を別体のネジによってネジ結合し、前記第１の徐冷用延長管の下端に、第２の徐冷用延長管の上端を別体のネジによってネジ結合したので、アダプタからネジを外せば、アダプタから第１の徐冷用延長管を外すことができ、その本体が伸縮可能であるので、当該本体を縮めて、加熱炉下部に空間を空け、光ファイバを露出させて切断することが簡単にでき取り扱い易い。   The upper end of the first slow cooling extension pipe is screwed to the lower part of the hollow adapter provided in the lower part of the heating furnace with a separate screw, and the second lower end of the first slow cooling extension pipe is connected to the second end. Since the upper end of the slow cooling extension tube is screwed with a separate screw, if the screw is removed from the adapter, the first slow cooling extension tube can be removed from the adapter, and the main body can be expanded and contracted. The main body is shrunk, a space is formed in the lower part of the heating furnace, and the optical fiber is exposed and can be easily cut and easily handled.

本発明の実施形態に係るに徐冷用延長管を設けた紡糸機の全体説明図である。1 is an overall explanatory view of a spinning machine provided with a slow cooling extension pipe according to an embodiment of the present invention. 図１の徐冷用延長管およびその周辺の説明図である。It is explanatory drawing of the extension pipe | tube for slow cooling of FIG. 1, and its periphery. 図１の徐冷用延長管の第１の徐冷用延長管の詳細図である。FIG. 2 is a detailed view of a first slow cooling extension tube of the slow cooling extension tube of FIG. 1. （ａ）は従来の紡糸機用延長管（徐冷用延長管）を設けた紡糸機の全体説明図、（ｂ）はアダプタ周辺の説明図、（ｃ）は徐冷用延長管用の調芯治具の横断した説明図である。(A) is an overall explanatory view of a spinning machine provided with a conventional spinning machine extension pipe (slow cooling extension pipe), (b) is an explanatory view around the adapter, and (c) is an alignment for the slow cooling extension pipe. It is explanatory drawing which the jig crossed.

以下、本発明の実施の形態を添付図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図１は、実施形態に係る徐冷用延長管を設けた紡糸機の全体説明図、図２は、図１の徐冷用延長管およびその周辺の説明図、図３は、図１の徐冷用延長管の第１の徐冷用延長管の詳細図である。なお、図中、図４と同一の符号を付した部分は同一物を表わす。   FIG. 1 is an overall explanatory view of a spinning machine provided with a slow cooling extension pipe according to the embodiment, FIG. 2 is an explanatory view of the slow cooling extension pipe of FIG. 1 and its surroundings, and FIG. It is detail drawing of the 1st slow cooling extension pipe of a cooling extension pipe. In the figure, the same reference numerals as those in FIG. 4 denote the same components.

実施形態に係る光ファイバの紡糸機は、光ファイバ母材１２を加熱する加熱炉１０下部に中空の徐冷用延長管（第１の徐冷用延長管２４および第２の徐冷用延長管２６）を設け、該加熱炉１０から下方に向けて引き出された光ファイバ１４を前記徐冷用延長管の中空内に通して徐冷するものである。   The optical fiber spinning machine according to the embodiment includes a hollow slow cooling extension pipe (a first slow cooling extension pipe 24 and a second slow cooling extension pipe) at the bottom of the heating furnace 10 for heating the optical fiber preform 12. 26), and the optical fiber 14 drawn downward from the heating furnace 10 is gradually cooled by passing through the hollow of the slow cooling extension tube.

前記中空の徐冷用延長管は、伸縮かつ屈曲の可能なベローズ状の本体２４ａの上端および下端にフランジ２４ｂおよび２４ｃを設けた第１の徐冷用延長管２４と、管状の本体２６ａの上端および下端にフランジ２６ｂおよび２６ｃを設けた第２の徐冷用延長管２６とを有し、前記第１の徐冷用延長管２４を加熱炉１０下部に接続し、前記第１の徐冷用延長管２４下部に前記第２の徐冷用延長管２６を接続して構成されている。   The hollow slow cooling extension pipe includes a first slow cooling extension pipe 24 provided with flanges 24b and 24c at the upper and lower ends of a bellows-shaped body 24a that can be expanded and contracted, and an upper end of a tubular main body 26a. And a second slow cooling extension pipe 26 provided with flanges 26b and 26c at the lower end, the first slow cooling extension pipe 24 is connected to the lower part of the heating furnace 10, and the first slow cooling extension The second slow cooling extension pipe 26 is connected to the lower part of the extension pipe 24.

前記加熱炉１０下部に中空のアダプタ２８を設け、このアダプタ２８の下部に前記第１の徐冷用延長管２４の上端のフランジ２４ｂを別体のネジ３０によってネジ結合する。   A hollow adapter 28 is provided at the lower portion of the heating furnace 10, and a flange 24 b at the upper end of the first slow cooling extension tube 24 is screwed to the lower portion of the adapter 28 with a separate screw 30.

そして、前記第１の徐冷用延長管２４の下端のフランジ２４ｃに、第２の徐冷用延長管２６の上端のフランジ２６ｂを別体のネジ３２によってネジ結合したものである。   The upper flange 26b of the second slow cooling extension tube 26 is screwed to the flange 24c of the lower end of the first slow cooling extension tube 24 with a separate screw 32.

また、第２の徐冷用延長管２６に、その本体を側方から支持しかつ芯出しをするため延長管本体２６ａを水平方向に移動可能な延長管用ブラケット３４を設けている。   In addition, the second slow cooling extension pipe 26 is provided with an extension pipe bracket 34 which can move the extension pipe main body 26a in the horizontal direction in order to support the main body from the side and perform centering.

また、アダプタ２８は管状の本体２８ａの上端および下端にフランジ２８ｂおよび２８ｃが設けられる。その上端のフランジ２８ｂ上部から外周に雄ネジの形成された筒状部２８ｄが上方向きに突出形成されている。当該筒状部２８ｄを加熱炉１０下部のネジ部１０ｄにねじ込んで上端のフランジ２８ｂを加熱炉１０下部に当接させて取り付ける。   The adapter 28 is provided with flanges 28b and 28c at the upper and lower ends of a tubular main body 28a. A cylindrical portion 28d having a male screw formed on the outer periphery from the upper portion of the upper flange 28b is formed to project upward. The cylindrical part 28d is screwed into the screw part 10d at the lower part of the heating furnace 10, and the upper end flange 28b is brought into contact with the lower part of the heating furnace 10 and attached.

また、アダプタ２８下端のフランジ２８ｃに、第１の徐冷用延長管２４の上端のフランジ２４ｂを突き合わせて両者（フランジ２８ｃとフランジ２４ｂ）同士を別体のネジ３０（穴付きボルトまたは六角ボルトが好ましい）によってネジ結合する。ネジ３０はアダプタ２８側のフランジ２８ｃ（通孔）から、第１の徐冷用延長管２４のフランジ２４ｂ（雌ネジ孔）に下向きに通して螺着する。   Further, the flange 28b at the lower end of the adapter 28 is brought into contact with the flange 24b at the upper end of the first slow cooling extension pipe 24, and the two screws (the flange 28c and the flange 24b) are separated from each other with a screw 30 (a bolt with a hole or a hexagon bolt). (Preferably). The screw 30 is screwed downwardly from the flange 28c (through hole) on the adapter 28 side to the flange 24b (female screw hole) of the first slow cooling extension pipe 24.

また、同様に、第１の徐冷用延長管２４下端のフランジ２４ｃに、第２の徐冷用延長管２６の上端のフランジ２６ｂを突き合わせて両者（フランジ２４ｃとフランジ２６ｂ）同士を別体のネジ３２（穴付きボルトまたは六角ボルトが好ましい）によってネジ結合する。ネジ３２は第１の徐冷用延長管２４のフランジ２４ｃ（通孔）から第２のアダプタ２８側のフランジ２６ｂ（雌ネジ孔）に下向きに通して螺着する。
なお、第１の徐冷用延長管２４、第２の徐冷用延長管２６、アダプタ２８は耐熱性の観点からＳＵＳ材とすることが好ましい。また、ネジ３０、３２も必要に応じてＳＵＳ材とすることが好ましい。 Similarly, the flange 24c at the lower end of the first slow cooling extension pipe 24 is brought into contact with the flange 26b at the upper end of the second slow cooling extension pipe 26 so that the two (flange 24c and flange 26b) are separated from each other. Screws are connected by screws 32 (preferably bolts with holes or hexagon bolts). The screw 32 is threaded downwardly from the flange 24c (through hole) of the first slow cooling extension tube 24 to the flange 26b (female screw hole) on the second adapter 28 side.
The first slow cooling extension tube 24, the second slow cooling extension tube 26, and the adapter 28 are preferably SUS materials from the viewpoint of heat resistance. The screws 30 and 32 are also preferably made of SUS material as necessary.

前記延長管用ブラケット３４は、第２の徐冷用延長管２６の本体２６ａを取り囲むようにして支持する支持治具３４ａと当該支持治具３４ａを左右に駆動する駆動体３４ｂとを有している。前記延長管用ブラケット３４はアルミニウムを材質とすることが好適である。また、駆動体３４ｂの駆動機構が適宜に設定できるのでその図示は略する。   The extension pipe bracket 34 includes a support jig 34a that supports the main body 26a of the second slow cooling extension pipe 26 and a driving body 34b that drives the support jig 34a left and right. . The extension pipe bracket 34 is preferably made of aluminum. In addition, the driving mechanism of the driving body 34b can be set as appropriate, and the illustration thereof is omitted.

前記支持治具３４ａは、図２に示すように、筒状であって上端および下端それぞれに蓋部３４ｃ、３４ｃの径方向中央部の空間に、第２の徐冷用延長管２６本体２６ａを挿通させると共に、それら蓋部３４ｃ、３４ｃに内径方向にねじ込んだ複数（実施形態では４つ）のネジ３４ｃ１、３４ｃ１…によって、第２の徐冷用延長管２６本体２６ａを外周から挟み付けて位置調整可能に固定している。つまり、それら複数のネジ３４ｃ１，３４ｃ１…の出し入れによって第２の徐冷用延長管２６本体２６ａの固定位置が調整可能になっている。   As shown in FIG. 2, the support jig 34a has a cylindrical shape, and the second slow cooling extension pipe 26a 26a is provided in the space at the center in the radial direction of the lids 34c and 34c at the upper and lower ends, respectively. The second slow cooling extension pipe 26a 26a is sandwiched from the outer periphery by a plurality of (four in the embodiment) screws 34c1, 34c1,... Screwed into the lid portions 34c, 34c in the inner diameter direction. It is fixed so that it can be adjusted. That is, the fixed position of the second slow cooling extension pipe 26a 26a can be adjusted by inserting and removing the plurality of screws 34c1, 34c1,.

実施形態に係る紡糸機および紡糸機用の延長管によれば、中空の徐冷用延長管を、屈曲および伸縮の可能なベローズ状の本体２４ａの上端および下端にフランジ２４ｂおよび２４ｃを設けた第１の徐冷用延長管２４と、管状の本体２６ａの上端および下端にフランジ２６ｂおよび２６ｃを設けた第２の徐冷用延長管２６とを有したものとしていることから、徐冷用延長管の芯出しに際して、上記第１の徐冷用延長管２４本体２４ａのベローズが柔軟に屈曲するので、第２の徐冷用延長管２６を芯出しする際に振り回しやすくかつ加熱炉１０下部に設けたアダプタ２８や徐冷用延長管自体をこじることが無いので、気密性の低下を確実に防止できる。   According to the spinning machine and the extension pipe for the spinning machine according to the embodiment, the hollow slow cooling extension pipe is provided with flanges 24b and 24c at the upper and lower ends of a bellows-like main body 24a that can be bent and stretched. The slow cooling extension pipe 24 has the first slow cooling extension pipe 24 and the second slow cooling extension pipe 26 provided with flanges 26b and 26c at the upper and lower ends of the tubular body 26a. Since the bellows of the first slow cooling extension pipe 24 main body 24a bends flexibly during centering, the second slow cooling extension pipe 26 can be easily swung and provided at the bottom of the heating furnace 10. Further, since the adapter 28 and the slow cooling extension tube itself are not distorted, it is possible to reliably prevent a decrease in airtightness.

また、加熱炉１０下部に設けた中空のアダプタ２８の下部フランジ２８ｃに前記第１の徐冷用延長管２４の上端のフランジ２４ｂを別体のネジ３０によってネジ結合し、前記第１の徐冷用延長管２４の下端のフランジ２４ｃに、第２の徐冷用延長管２６の上端のフランジ２６ｂを別体のネジ３２によってネジ結合したので、アダプタ２８からネジ３０を外せば、第１の徐冷用延長管２４をアダプタ２８から外すことができ、本体２４ａのベローズを縮めて、加熱炉１０下部に空間を空け、光ファイバ１４を露出させて切断することが簡単にでき、取り扱い易い。   Further, a flange 24b at the upper end of the first slow cooling extension tube 24 is screwed to a lower flange 28c of a hollow adapter 28 provided in the lower part of the heating furnace 10 with a separate screw 30 so that the first slow cooling is performed. Since the flange 26b at the upper end of the second slow cooling extension pipe 26 is screw-coupled to the flange 24c at the lower end of the extension pipe 24 by a separate screw 32, if the screw 30 is removed from the adapter 28, the first slow-down extension pipe 26 is removed. The cooling extension tube 24 can be removed from the adapter 28, the bellows of the main body 24a can be shrunk, a space can be formed in the lower part of the heating furnace 10, and the optical fiber 14 can be exposed and cut, which is easy to handle.

なお、本発明は、上記の実施形態に限定されず、種々の形態に変形が可能である。例えば、第１の徐冷用延長管において伸縮が可能な概略筒状の本体には、上記実施形態のベローズ状の本体に限定されず、内筒および外筒が気密を保って摺接する二重筒体構造等複数の筒が摺接する多重管構造を当該第１の徐冷用延長管の本体の構成とすることができる。   In addition, this invention is not limited to said embodiment, A deformation | transformation into a various form is possible. For example, the substantially cylindrical main body that can be expanded and contracted in the first extension tube for slow cooling is not limited to the bellows-shaped main body of the above-described embodiment, and the inner cylinder and the outer cylinder are slidably in contact with each other while maintaining airtightness. A multiple tube structure in which a plurality of cylinders such as a cylinder structure are in sliding contact with each other can be configured as the main body of the first slow cooling extension tube.

本発明の紡糸機用延長管及び紡糸機は、加熱炉の下に設置される徐冷用延長管の気密性及び徐冷用延長管を簡単に外して加熱炉の下でのファイバ切断性を向上するために利用できる。   The extension tube for a spinning machine and the spinning machine according to the present invention have the airtightness of the extension tube for slow cooling installed under the heating furnace and the fiber cutting property under the heating furnace by simply removing the extension tube for slow cooling. Can be used to improve.

１０ 加熱炉
１２ 光ファイバ母材
１４ 光ファイバ
１４ａ 光ファイバの先端
２４ 第１の徐冷用延長管
２４ａ 第１の徐冷用延長管の本体
２４ｂ 第１の徐冷用延長管の上端のフランジ
２４ｃ 第１の徐冷用延長管の下端のフランジ
２６ 第２の徐冷用延長管
２６ａ 第２の徐冷用延長管の本体
２６ｂ 第２の徐冷用延長管の上端のフランジ
２６ｃ 第２の徐冷用延長管の下端のフランジ
２８ アダプタ
２８ａ アダプタの本体
２８ｂ アダプタの上端のフランジ
２８ｃ アダプタの下端のフランジ
２８ｄ アダプタの上端の筒状部
３０ ネジ
３２ ネジ
３４ 延長管用ブラケット
３４ａ ブラケットの支持治具
３４ｂ ブラケットの駆動体 DESCRIPTION OF SYMBOLS 10 Heating furnace 12 Optical fiber preform 14 Optical fiber 14a Optical fiber tip 24 First slow cooling extension pipe 24a First slow cooling extension pipe main body 24b First slow cooling extension pipe flange 24c Flange 26 at the lower end of the first slow cooling extension pipe 26 Second extension pipe 26a for the second slow cooling extension pipe main body 26b Flange 26c at the upper end of the second slow cooling extension pipe Second slow cooling Flange 28 at the lower end of the cooling extension pipe Adapter 28a Adapter body 28b Flange 28c at the upper end of the adapter Flange 28d at the lower end of the adapter Cylindrical portion 30 at the upper end of the adapter Screw 32 Screw 34 Extension bracket 34a Bracket support jig 34b Bracket Driving body

Claims (5)

光ファイバ母材を加熱する加熱炉下部に中空の徐冷用延長管を設け、該加熱炉から下方に向けて引き出された光ファイバを前記中空内に通して徐冷する光ファイバの紡糸機において、
前記中空の徐冷用延長管は、伸縮かつ屈曲が可能な概略筒状の本体を設けた第１の徐冷用延長管と、管状の本体を設けた第２の徐冷用延長管とを有し、
前記第１の徐冷用延長管を加熱炉下部に接続し、前記第１の徐冷用延長管の下部に前記第２の徐冷用延長管を接続したことを特徴とする紡糸機溶延長管。 An optical fiber spinning machine in which a hollow slow cooling extension tube is provided at a lower part of a heating furnace for heating an optical fiber preform, and an optical fiber drawn downward from the heating furnace is gradually cooled through the hollow ,
The hollow slow cooling extension pipe includes a first slow cooling extension pipe provided with a substantially cylindrical main body capable of expansion and contraction and bending, and a second slow cooling extension pipe provided with a tubular main body. Have
The first slow cooling extension pipe is connected to the lower part of the heating furnace, and the second slow cooling extension pipe is connected to the lower part of the first slow cooling extension pipe. tube. 前記加熱炉下部に中空のアダプタを設け、このアダプタの下部に前記第１の徐冷用延長管の上端を別体のネジによってネジ結合し、
前記第１の徐冷用延長管の下端に、第２の徐冷用延長管の上端を別体のネジによってネジ結合したことを特徴とする請求項１に記載の紡糸機用延長管。 A hollow adapter is provided at the lower part of the heating furnace, and the upper end of the first slow cooling extension pipe is screwed to the lower part of the adapter with a separate screw,
2. The extension pipe for a spinning machine according to claim 1, wherein the upper end of the second slow cooling extension pipe is screwed to the lower end of the first slow cooling extension pipe with a separate screw. 第２の徐冷用延長管に、その本体を側方から支持しかつ芯出しをするため移動可能にする延長管用ブラケットを設けたことを特徴とする請求項１または２に記載の紡糸機用延長管。   3. A spinning machine according to claim 1, wherein the second slow cooling extension pipe is provided with an extension pipe bracket that supports the body from the side and is movable for centering. Extension tube. アダプタは上端および下端にフランジが設けられ、上端のフランジを加熱炉下部に当接して取り付け、下端のフランジを第１の徐冷用延長管の上端のフランジに別体のネジによってネジ結合することを特徴とする請求項１から３のうちの１項に記載の紡糸機用延長管。   The adapter is provided with flanges at the upper end and lower end, the upper end flange is attached to the lower part of the heating furnace, and the lower end flange is screwed to the upper end flange of the first slow cooling extension pipe with a separate screw. The extension pipe for a spinning machine according to any one of claims 1 to 3, wherein: 請求項１ないし４のうちの１項に記載の紡糸機延長管を用いたことを特徴とする光ファイバの紡糸機。   An optical fiber spinning machine using the spinning machine extension pipe according to claim 1.
JP2010036781A 2010-02-23 2010-02-23 Extended tube for spinning machine and spinning machine Pending JP2011173733A (en)

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CN107082560A (en) * 2017-05-15 2017-08-22 江苏亨通光纤科技有限公司 A kind of optical fiber annealing extension tube
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