JPH06194528A - Optical fiber take-up bobbin - Google Patents

Abstract

PURPOSE:To prevent an optical fiber wound around a bobbin from being loosened by increasing the tension of the optical fiber wound around the bobbin at the time of carrying the bobbin and to prevent the transmission loss of the optical fiber due to the tension from being detected by reducing the tension at the time of measuring the transmission loss. CONSTITUTION:A hard movable part 3 which is freely shifted in a radial direction is installed on a part of the outer circumference of the winding barrel of the bobbin 1, an movable part 3 controlling mechanism 6 is installed on the bobbin, and by adjusting the projection height of the part of the movable part 3 from the outer circumferential surface of the winding barrel in the radial direction, the tension and side pressure of the optical fiber wound around the bobbin are increased/decreased.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は光ファイバを巻き取るた
めのボビンに関するものであり、他の特別の器具を用い
ることなく搬送時の光ファイバの巻き崩れを防止するこ
とができ、さらに光ファイバの側圧等による伝送損失の
増加のない状態で、ボビンに巻き取られている光ファイ
バの伝送損失を測定することができるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin for winding an optical fiber, which can prevent the optical fiber from collapsing during transportation without using any special equipment. It is possible to measure the transmission loss of the optical fiber wound around the bobbin without the increase of the transmission loss due to the lateral pressure or the like.

【０００２】[0002]

【従来の技術】光ファイバをボビンに巻き取る時に光フ
アイバに掛ける張力が大きければ光ファイバが堅く巻か
れるので搬送時に巻き崩れを生じることはないが、この
場合は光ファイバに大きな張力および大きな側圧が掛か
っているので、ボビンに巻いた状態で行われる伝送損失
試験において光ファイバの真の伝送損失よりも大きい伝
送損失が検出されることになる。他方、光ファイバをボ
ビンに巻き取る時に光ファイバに掛ける張力が小さけれ
ば、伝送損失試験における上記の不都合は軽減、乃至解
消されるが搬送時にボビンに加わる振動によって巻き崩
れを生じてしまうことになる。したがって、光ファイバ
をボビンに巻き取る時に光ファイバに掛ける張力の大き
さは伝送損失の試験結果が大きくなるという問題を残し
つつ、可及的に巻き崩れを生じない程度の大きさの張力
を掛けて巻き取らざるを得ず、このようにしても巻き崩
れを確実に防止できる程に大きくすることはできないの
で、巻き崩れの問題も幾分残されている現状である。2. Description of the Related Art When an optical fiber is wound on a bobbin, if the tension applied to the optical fiber is large, the optical fiber is tightly wound, so that the winding is not collapsed during transportation. In this case, the optical fiber has a large tension and a large lateral pressure. Therefore, a transmission loss larger than the true transmission loss of the optical fiber is detected in the transmission loss test performed in the state of being wound on the bobbin. On the other hand, if the tension applied to the optical fiber at the time of winding the optical fiber around the bobbin is small, the above-mentioned inconvenience in the transmission loss test is alleviated or eliminated, but the vibration applied to the bobbin at the time of transportation causes the collapse of the winding. . Therefore, the tension applied to the optical fiber when the optical fiber is wound on the bobbin leaves the problem that the test result of the transmission loss becomes large, but the tension applied is such that the winding collapse does not occur as much as possible. Inevitably, the problem of winding collapse remains to some extent, because even if this is done, it cannot be made large enough to reliably prevent the collapse of winding.

【０００３】[0003]

【発明が解決しようとする課題】本発明は上記の従来技
術の問題の解消を目的とし、このために一定の張力を掛
けて巻いた後ボビンに巻いたままで光ファイバの巻きの
堅さを増減できるような巻き取りボビンの機構、構造を
工夫することである。SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art. For this reason, the winding tightness of the optical fiber is increased or decreased while being wound on a bobbin after being wound with a certain tension. The mechanism and structure of the take-up bobbin should be devised.

【０００４】[0004]

【課題を解決のために講じた手段】上記課題解決のため
に講じた手段は次の要素（イ）、（ロ）によって構成さ
れるものである。 （イ）ボビン巻胴外周の一部に半径方向に変移自在な硬
質の可動部を設けたこと、（ロ）ボビンに上記可動部の
操作機構を設けたこと。なお、上記の「硬質」はボビン
に光フアイバが所定の張力をもって巻き付けられた時、
その巻き付け力によって可動部材が変形しない程度の堅
さを有することを意味する。[Means taken for solving the problems] The means taken for solving the above problems are constituted by the following elements (a) and (b). (A) A hard movable part that is movable in the radial direction is provided on a part of the outer circumference of the bobbin winding cylinder, and (b) an operation mechanism for the movable part is provided on the bobbin. The above "hard" means that when the optical fiber is wound around the bobbin with a predetermined tension,
It means that the movable member has such a rigidity that the movable member is not deformed by the winding force.

【０００５】[0005]

【作 用】ボビンを光ファイバ巻取装置に装着したとき
の可動部の一部を巻胴の外周面から若干半径方向に突出
させておいて光ファイバを巻き取る。この可動部は硬質
なものであるから光ファイバの巻き付け力よって変形す
ることはなく、したがって巻胴に巻かれた光ファイバの
円筒状の束の内面の一部をこの可動部が半径方向外方に
支えることができる。この可動部をボビンに設けた操作
機構によって操作してその巻胴外周面から半径方向内方
に引っ込めると可動部による光ファイバの円筒状の束に
対する支持力が零になるので巻胴による上記支持力が減
少する。巻胴による光ファイバの円筒状の束に対する支
持力が減少すると光ファイバの巻きの堅さが減少乃至は
零になるので光ファイバに掛かる張力、側圧が著しく減
少する。反対に可動部の巻胴外周面からの突出高さを増
大させると、光ファイバの円筒状の束の内面に対する可
動部の支持力が増大するので、巻胴による上記支持力が
増大する。巻胴による光ファイバの円筒状の束に対する
支持力が増大すると光ファイバの巻きの堅さが増大する
ので光ファイバに掛かる張力、側圧が著しく増大する。
光ファイバの張力による伸びは例えば金属に比して極め
て小さいので上記可動部の巻胴の半径方向への小さな変
移によって、巻胴に巻かれた光ファイバの張力は著しく
変化する。所定の張力を掛けて巻き取った後に可動部を
半径方向外方に少し変移させて光ファイバの巻きを堅く
しておくことによって、搬送時に著しい温度変化、強い
振動があっても確実に巻き崩れを防止することができ
る。また、可動部を少し半径方向内方に変移させて光フ
ァイバの巻きを緩くして光ファイバの張力、側圧を大き
く減少させてから伝送試験を行うことによって、光ファ
イバに掛かっている張力、側圧の伝送損失に対する影響
を殆ど零にすることができる。[Operation] The optical fiber is wound while a part of the movable part when the bobbin is mounted on the optical fiber winding device is slightly projected from the outer peripheral surface of the winding cylinder in the radial direction. Since this movable part is hard, it is not deformed by the winding force of the optical fiber. Therefore, this movable part does not move a part of the inner surface of the cylindrical bundle of optical fibers wound around the winding cylinder in the radially outward direction. Can be supported by. When the movable part is operated by an operating mechanism provided on the bobbin and retracted inward in the radial direction from the outer peripheral surface of the winding drum, the supporting force for the cylindrical bundle of optical fibers by the movable part becomes zero, so the above-mentioned support by the winding drum. The power decreases. When the supporting force for the cylindrical bundle of optical fibers by the winding cylinder decreases, the rigidity of the winding of the optical fibers decreases or becomes zero, so that the tension and lateral pressure applied to the optical fibers significantly decrease. On the contrary, if the protrusion height of the movable portion from the outer peripheral surface of the winding drum is increased, the supporting force of the movable portion with respect to the inner surface of the cylindrical bundle of optical fibers increases, so that the supporting force of the winding drum increases. When the supporting force of the winding cylinder for the cylindrical bundle of optical fibers is increased, the rigidity of the winding of the optical fibers is increased, so that the tension and lateral pressure applied to the optical fibers are significantly increased.
Since the elongation of the optical fiber due to the tension is extremely smaller than that of, for example, metal, the tension of the optical fiber wound around the winding cylinder remarkably changes due to the small displacement of the movable part in the radial direction of the winding cylinder. After applying a predetermined tension and winding up, the movable part is slightly displaced outward in the radial direction to make the winding of the optical fiber stiff, so that the winding will surely collapse even if there is a significant temperature change or strong vibration during transportation. Can be prevented. Also, by moving the movable part slightly inward in the radial direction to loosen the winding of the optical fiber and greatly reducing the tension and lateral pressure of the optical fiber, and then conducting a transmission test, the tension and lateral pressure applied to the optical fiber are reduced. The effect on transmission loss can be almost zero.

【０００６】[0006]

【実 施 例】次いで図１、図２を参照しつつ本発明の
実施例を説明する。通常のボビンの巻胴１の外周の一部
に半径方向の長孔２を設け、この長孔２に巻胴１と略等
しい長さの偏心カム３を嵌合させ、この偏心カム３の両
端の偏心軸４、４をボビンＢの左右のフランジ５、５に
回転自在に支持させている。偏心カム３の一方の偏心軸
４をフランジ５の外側面に突出させ、この突出端にハン
ドル６を設けている。ハンドル６を操作して偏心カム３
を回動させると、偏心カム３は巻胴１の長孔２の中に完
全に引っ込められ、又はその一部が巻胴１の外周面から
更に突出する。偏心カムの一部を若干（１ｍｍ）巻胴１
の外周面から突出させた状態でこのボビンを巻取装置に
装着して所定の張力をもって光ファイバを巻き取る。そ
の後偏心カム３を完全に巻胴１の外周面から引っ込める
ことによって、巻胴に巻き取られた光ファイバの巻きは
完全に緩められる。反対に偏心カム３の一部を巻胴１の
外周面から更に突出させると巻胴に巻き取られた光ファ
イバの巻きの堅さは増大する。通常のボビンについて
は、可動部のその一部の半径方向への最大変移量は０．
４ｍｍ〜０．８ｍｍ程度あれば十分である。したがっ
て、可動部材として偏心カムを用いた上記実施例におい
ては偏心カムの直径ｄを５ｍｍ〜１５ｍｍ程度、偏心カ
ム３の軸線に対する偏心軸４の偏心量ｅを０．２ｍｍ〜
０．４ｍｍ程度とすればよい。巻胴１の外径Ｄ（胴径）
が３００ｍｍ、内幅Ｌが２００ｍｍの図示の実施例にお
いては偏心カム３の径ｄは１０ｍｍ、偏心量ｅは０．３
ｍｍである。上記実施例のボビンに線径１．３μｍ、シ
ングルモードの光ファイバ素線１００００ｍを通常の巻
き取り張力をもって巻き取り、そのままで伝送損失を測
定した結果は０．３７ｄＢ／ｋｍであったが、偏心カム
３を完全に巻胴１の長孔２内に引っ込めた状態での測定
結果は０．３５ｄＢ／ｋｍであった。その後光ファイバ
の円筒状の束を巻胴から外して全くフリーの状態にして
測定した結果は０．３５ｄＢ／ｋｍであり、偏心カム３
を完全に巻胴１の長孔２内に引っ込めた状態での測定結
果と全く同じであった。巻き取り時の温度と試験温度又
は搬送温度とが異なる場合は、可動部が形状記憶合金に
よって半径方向に変移されるようにすることもできる。
この場合は可動部を巻胴の長孔に半径方向に変移自在に
嵌合させ、その両端をボビンのフランジによって半径方
向に変移自在に支持させると共に、可動部を半径方向内
方から形状記憶合金によって支持させる。一つの巻胴に
二つの可動部材を設け、その一方を搬送時の温度で半径
方向外方に変形する形状記憶合金によって支持させ、他
方を伝送損失試験温度で半径方向内方に変形する形状記
憶合金によって支持させることによって、搬送時に光フ
ァイバの巻きの堅さを増大させ、試験時に光ファイバの
巻きの堅さを緩めることができる。搬送時の巻き崩れが
問題にならない使用形態の場合は可動部材を一つとし、
これを伝送損失試験温度で半径方向内方に変形する形状
記憶合金で支持させればよい。形状記憶合金による操作
機構が可動部材の操作機構に当たるが、この場合は形状
記憶合金による操作機構をボビンの外側に設けるよりも
ボビンの巻胴内に設ける方が設計上望ましい。EXAMPLES Next, examples of the present invention will be described with reference to FIGS. A radial elongated hole 2 is provided in a part of the outer circumference of a winding bobbin 1 of an ordinary bobbin, and an eccentric cam 3 having a length substantially equal to that of the winding cylinder 1 is fitted into the elongated hole 2 and both ends of the eccentric cam 3 The eccentric shafts 4 and 4 are rotatably supported by the left and right flanges 5 and 5 of the bobbin B. One eccentric shaft 4 of the eccentric cam 3 is projected to the outer surface of the flange 5, and a handle 6 is provided at this projecting end. Operate handle 6 to operate eccentric cam 3
When is rotated, the eccentric cam 3 is completely retracted into the elongated hole 2 of the winding drum 1, or a part of the eccentric cam 3 further projects from the outer peripheral surface of the winding drum 1. Part of the eccentric cam is slightly (1 mm) winding cylinder 1
The bobbin is attached to the winding device in a state of being projected from the outer peripheral surface of the optical fiber and the optical fiber is wound with a predetermined tension. Then, by retracting the eccentric cam 3 completely from the outer peripheral surface of the winding drum 1, the winding of the optical fiber wound on the winding drum is completely loosened. On the contrary, when a part of the eccentric cam 3 is further projected from the outer peripheral surface of the winding drum 1, the winding rigidity of the optical fiber wound on the winding drum is increased. For a normal bobbin, the maximum amount of radial displacement of that part of the movable part is 0.
About 4 mm to 0.8 mm is sufficient. Therefore, in the above embodiment using the eccentric cam as the movable member, the diameter d of the eccentric cam is about 5 mm to 15 mm, and the eccentric amount e of the eccentric shaft 4 with respect to the axis of the eccentric cam 3 is 0.2 mm to.
It may be about 0.4 mm. Outside diameter D of the winding cylinder 1 (body diameter)
Is 300 mm and the inner width L is 200 mm, the eccentric cam 3 has a diameter d of 10 mm and an eccentric amount e of 0.3.
mm. A single-mode optical fiber element wire 10000 m having a wire diameter of 1.3 μm was wound around the bobbin of the above-mentioned embodiment with a normal winding tension, and the transmission loss was measured as it was. The result was 0.37 dB / km. The measurement result when the cam 3 was completely retracted into the long hole 2 of the winding drum 1 was 0.35 dB / km. After that, the cylindrical bundle of optical fibers was removed from the winding cylinder and was completely free, and the measurement result was 0.35 dB / km.
Was completely retracted into the elongated hole 2 of the winding drum 1 and was exactly the same as the measurement result. If the temperature at the time of winding and the test temperature or the transport temperature are different, the movable part may be displaced by the shape memory alloy in the radial direction.
In this case, the movable part is fitted in the elongated hole of the winding cylinder so as to be displaced in the radial direction, and both ends thereof are supported by the flanges of the bobbin so as to be displaced in the radial direction. Support by. Two movable members are provided on one winding cylinder, one of which is supported by a shape memory alloy that deforms radially outward at the temperature during transportation, and the other that deforms radially inward at the transmission loss test temperature. By being supported by the alloy, it is possible to increase the stiffness of the optical fiber winding during transport and loosen the stiffness of the optical fiber winding during testing. In the case of usage where roll collapse during transportation does not pose a problem, use one movable member,
This may be supported by a shape memory alloy that deforms radially inward at the transmission loss test temperature. The operating mechanism of the shape memory alloy corresponds to the operating mechanism of the movable member. In this case, it is preferable in terms of design to provide the operating mechanism of the shape memory alloy inside the bobbin rather than outside the bobbin.

【０００７】[0007]

【効 果】前記の本発明の課題を解決した発明は従来公
知ではない。したがって、この新規な課題を解決したこ
と自体が本発明特有の顕著な効果である。すなわち、ボ
ビンに巻き取られた光ファイバの巻きの堅さを、搬送
時、伝送損失試験時に応じて適宜増減させることができ
るので、温度変化、振動等による搬送時の巻き崩れを確
実に防止することができ、かつ光ファイバの側圧、張力
の影響を完全に受けない状態で伝送損失試験を行うこと
ができるので光ファイバ本来の伝送損失を正確に測定す
ることができる。したがってこの伝送損失試験による不
良率を光ファイバの本来の値まで低下させることがで
き、伝送損失試験による不良の発生を減少するので、製
品歩留まりを大きく向上させることができる。更に、搬
送時の巻き崩れを完全に防止できるのでこの巻き崩れに
よる搬送時の不良品の発生を完全に防止できる。更に、
搬送時の巻き崩れ防止、伝送損失試験時の伝送損失の増
大を考慮することなく、巻き取り時に光ファイバに掛け
る張力を自由に選択できることも本発明の大きな利点で
ある。[Effect] The invention which solves the above-mentioned problems of the present invention has not been publicly known. Therefore, the solution to this novel problem is a remarkable effect peculiar to the present invention. That is, since the winding tightness of the optical fiber wound on the bobbin can be appropriately increased or decreased according to the time of transportation and the transmission loss test, it is possible to reliably prevent the collapse of the winding during transportation due to temperature change, vibration, etc. Since the transmission loss test can be performed without being affected by the lateral pressure and tension of the optical fiber, the transmission loss inherent in the optical fiber can be accurately measured. Therefore, the defect rate due to the transmission loss test can be reduced to the original value of the optical fiber, and the occurrence of defects due to the transmission loss test can be reduced, so that the product yield can be greatly improved. Further, since the collapse of the roll during the transportation can be completely prevented, the generation of the defective product during the transport due to the collapse of the winding can be completely prevented. Furthermore,
It is also a great advantage of the present invention that the tension applied to the optical fiber at the time of winding can be freely selected without considering the collapse of the winding at the time of transportation and the increase of the transmission loss at the time of the transmission loss test.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例の下記図２のＡ−Ａ断面図で
ある。FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2 below, showing an embodiment of the present invention.

【図２】本発明の一実施例の側面図である。FIG. 2 is a side view of an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１・・・巻胴 ２・・・長孔 ３・・・偏心カム ４・・・偏心軸 ５・・・フランジ ６・・・ハンドル Ｂ・・・ボビン Ｄ・・・巻胴の外径 Ｌ・・・巻胴の内幅 ｄ・・・偏心カムの直径 ｅ・・・偏心カムの軸線に対する偏心軸の偏心量 1 ... Winding drum 2 ... Long hole 3 ... Eccentric cam 4 ... Eccentric shaft 5 ... Flange 6 ... Handle B ... Bobbin D ... Winding drum outer diameter L. ..Inner width of winding drum d ... diameter of eccentric cam e ... eccentricity of eccentric shaft with respect to eccentric cam axis

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】ボビン巻胴外周の一部に半径方向に変移自
在な硬質の可動部を設け、ボビンに上記可動部の操作機
構を設け、上記可動部の一部の巻胴外周面から半径方向
への突出高さを加減することによってボビンに巻かれた
光ファバの張力および側圧を増減させるようにした光フ
ァイバ巻取用ボビン。1. A bobbin winding drum is provided with a hard movable portion that is movable in a radial direction on a part of the outer circumference of the bobbin, and a bobbin is provided with an operating mechanism for the movable portion. An optical fiber winding bobbin adapted to increase or decrease the tension and lateral pressure of an optical fiber wound around a bobbin by adjusting the protruding height in the direction.