JPS6384804A - Thermal expansion absorption chuck - Google Patents
Thermal expansion absorption chuckInfo
- Publication number
- JPS6384804A JPS6384804A JP22621386A JP22621386A JPS6384804A JP S6384804 A JPS6384804 A JP S6384804A JP 22621386 A JP22621386 A JP 22621386A JP 22621386 A JP22621386 A JP 22621386A JP S6384804 A JPS6384804 A JP S6384804A
- Authority
- JP
- Japan
- Prior art keywords
- thermal expansion
- collet
- chucking
- chuck
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010521 absorption reaction Methods 0.000 title abstract description 6
- 210000000078 claw Anatomy 0.000 claims abstract description 28
- 239000011521 glass Substances 0.000 abstract description 16
- 230000007704 transition Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 24
- 238000000034 method Methods 0.000 description 22
- 239000005373 porous glass Substances 0.000 description 15
- 239000013307 optical fiber Substances 0.000 description 12
- 239000011162 core material Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01884—Means for supporting, rotating and translating tubes or rods being formed, e.g. lathes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material 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)
- Gripping On Spindles (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は被把持体を含めチャック全体が高温になる環境
下に置かれても、把持状態を変化させずに一定状態に保
つことを可能とするチャックに関し、本発明の適用され
る分野は特に限定されるものではないが、−例としては
光フアイバ母材の製造装置において、回転している心材
の外周に多孔質ガラス微粒子を堆積させ軸方向に成長さ
せる外付は工程で、心材の多孔質ガラス微粒子堆積部分
の振れ回りをな（し、中心部を偏心させずに光フアイバ
母材を作製できる光フアイバ母材の製造装置に本発明は
適用できるものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention makes it possible to maintain the gripping state in a constant state without changing even if the entire chuck including the object to be gripped is placed in a high temperature environment. Regarding the chuck, the field to which the present invention is applied is not particularly limited. For example, in an optical fiber base material manufacturing device, porous glass particles are deposited on the outer periphery of a rotating core material. External growth in the axial direction is a process in which the part of the core where the porous glass particles are deposited is rotated (this is a process that allows the optical fiber base material to be manufactured without eccentrically centering the core material. The invention is applicable.
〈従来の技術〉
光フアイバ母材の製造方法として従来から気相軸付法（
以下、ＶＡＤ法という）、肉付は法（以下、ＭＣＶＤ法
という）、外付は法などが知られている。このうち、Ｖ
ＡＤ法による光フアイバ母材製造法は、
の 光フアイバ母材の中心部になる部分を、燃焼バーナ
から噴出する酸水素炎中にガラス物質を入れ火炎加水分
解させて、生成するガラス微粒子を堆積させ、これを脱
水・透明化処理してガラスロッドとし、得られたガラス
ロッドの外周に石英ガラスチューブを外挿させて、石英
ガラスチューブとガラスロッドとを一体化するコラプス
工程を経て製造する場合と、
Ｏ反応容器内において、回転しているガラス棒心材の外
周に酸水素炎を噴出させると共に酸水素炎中にガラス原
料物質を供給して火炎加水分解させ、生成するガラス微
粒子をガラス棒心材の多局に堆積させつつ、ガラス棒心
材を軸方向に移動しながら、ガラス微粒子体を軸方向に
成長させる外付は工程を経てから、得られたガラス棒を
脱水・透明化処理して製造する場合とがある。<Conventional technology> The vapor phase shafting method (
Known methods include the VAD method (hereinafter referred to as the VAD method), the fleshing method (hereinafter referred to as the MCVD method), and the external method. Of these, V
The optical fiber base material production method using the AD method involves placing a glass substance in an oxyhydrogen flame ejected from a combustion burner and flame hydrolyzing the central part of the optical fiber base material, depositing the generated glass particles. This is then dehydrated and made transparent to form a glass rod, and a quartz glass tube is inserted around the outer periphery of the resulting glass rod to integrate the quartz glass tube and the glass rod. In the O reaction vessel, an oxyhydrogen flame is ejected around the outer periphery of the rotating glass rod core material, and a frit material is supplied into the oxyhydrogen flame to cause flame hydrolysis, and the resulting glass fine particles are attached to the glass rod core material. The glass rod core material is moved in the axial direction while the glass particles are grown in the axial direction while being deposited at multiple locations. There are cases where it is done.
上述した外付は工程はＶＡＤ法以外の他の光フアイバ母
材の製造方法にも適用することができる。従来の光フア
イバ母材製造方法における外付は工程について第４図（
ａ） （ｂ）を参照して説明する。両図に示すように反
応容＠！！２内に石英ガラスロッド６を鉛直下方に垂下
し、かつ一定方向・一定速度で回転させながら、石英ガ
ラスロッド６の外周に燃焼バーナ３から酸水素炎を噴出
させると共に酸水素炎中にガラス物質を導入して火炎加
水分解、生成するガラス微粒子を石英ガラスルラド６の
外周に堆積させ多孔質ガラス体７を成長させていた。す
なわち、
■ 石英ガラスロッド６を反応容器２内に鉛直下方に垂
下するように、反応容器２外上部に回転チャック１で把
持すると共に石英ガラスロッド６の下端部分（全長の約
ｌ／３）を多孔質ガラス体成長部５に設定しておく。The above-described external attachment process can also be applied to other optical fiber base material manufacturing methods other than the VAD method. The process for external attachment in the conventional optical fiber base material manufacturing method is shown in Figure 4 (
a) Explain with reference to (b). As shown in both figures, the reaction volume @! ! A quartz glass rod 6 is suspended vertically downward in the quartz glass rod 6, and while rotating at a constant speed in a constant direction, an oxyhydrogen flame is ejected from the combustion burner 3 around the outer periphery of the quartz glass rod 6, and a glass substance is injected into the oxyhydrogen flame. was introduced and subjected to flame hydrolysis, and the resulting glass particles were deposited on the outer periphery of the silica glass RURADO 6 to grow the porous glass body 7. That is, (1) Hold the quartz glass rod 6 at the outside upper part of the reaction vessel 2 with the rotary chuck 1 so that it hangs vertically downward into the reaction vessel 2, and also hold the lower end portion of the quartz glass rod 6 (approximately 1/3 of the total length). It is set in the porous glass growth section 5 in advance.
■ 外付は作業は、反応容器２の下部において石英ガラ
スロッド６外周に噴出口を向けて燃焼バーナ３を配置し
、燃焼バーナ３上部に排気管４を配置してお（。■ For external installation, the combustion burner 3 is placed in the lower part of the reaction vessel 2 with the spout facing the outer periphery of the quartz glass rod 6, and the exhaust pipe 4 is placed in the upper part of the combustion burner 3 (.
■ この状態において、燃焼バーナ３にＨガスおよび０
２ガスを供給して酸水素炎を発生させると共に図示外の
ガラス原料源からガス状ガラス原料物質を酸水素炎中に
供給して火炎加水分解させ、生成するガラス微粒子を多
孔質ガラス成長部５に堆積させながら、図示外の引上機
により回転チャック１を上方に移動し、多孔質ガラス成
長部５に多孔質ガラス体７を軸方向に成長させるもので
あった。■ In this state, H gas and zero
2 gas is supplied to generate an oxyhydrogen flame, and at the same time, gaseous frit material is supplied into the oxyhydrogen flame from a frit source not shown to cause flame hydrolysis, and the resulting glass fine particles are transferred to the porous glass growth section 5. The rotary chuck 1 was moved upward by a pulling machine not shown, and the porous glass body 7 was grown in the axial direction in the porous glass growth area 5.
〈発明が解決しようとする間層点〉
前述した従来の外付は工程によると、回転チャック１の
回転中心と石英ガラスロッド６の中心軸が一致しておれ
ば、多孔質ガラス体７は石英ガラスロッド６を中心とし
て軸方向に成長する筈であるが、一般には石英ガラスロ
ッド６の中心軸と回転チャック１の回転中心軸とは一致
せず、石英ガラスロッド６および多孔質ガラス成長部５
も振れ回る。この結果、多孔質ガラス成長部５が多孔質
ガラス体７の中心軸部に位置しないこととなり、光フア
イバ母材を線引きし光フアイバ化したときにコアの偏心
が生じる欠点があった。石英ガラスロッド６が振れ回る
原因としては、回転チャック１による振れ回りと、石英
ガラスウッド６に対する回転チャック１の把持角による
もの等が考えられる。このうち、回転チャック１に起因
する振れ回りは回転チャック１の加工・組立精度に依存
しているから、これらを改善することにより低減させる
ことができる。一方、石英ガラスロッド６に対する回転
チャック１の把持角によるもの等に起因する振れ回りに
対しては回転チャック１を含め、振れ回り量を測定し、
例えば石英ガラスロッド６自体を加熱軟化させることに
よし石英ガラスウッド６の中心軸を基準とする回転チャ
ック１の回転中心軸に合致する様修正することができる
。<Interlayer point to be solved by the invention> According to the process of the conventional external mounting described above, if the center of rotation of the rotary chuck 1 and the central axis of the quartz glass rod 6 coincide, the porous glass body 7 becomes a quartz glass rod. Although it is supposed to grow in the axial direction around the glass rod 6, generally the central axis of the quartz glass rod 6 and the central axis of rotation of the rotary chuck 1 do not coincide, and the quartz glass rod 6 and the porous glass growth section 5 do not coincide with each other.
It also swings around. As a result, the porous glass growth part 5 is not located at the central axis of the porous glass body 7, which has the drawback of causing eccentricity of the core when the optical fiber base material is drawn to form an optical fiber. Possible causes for the quartz glass rod 6 to swing around include swinging by the rotary chuck 1 and the gripping angle of the rotary chuck 1 with respect to the quartz glass wood 6. Of these, the whirling caused by the rotary chuck 1 depends on the machining and assembly accuracy of the rotary chuck 1, so it can be reduced by improving these. On the other hand, for whirling caused by the gripping angle of the rotary chuck 1 with respect to the quartz glass rod 6, the whirling amount including the rotary chuck 1 is measured,
For example, by heating and softening the quartz glass rod 6 itself, it can be corrected so that the central axis of rotation of the rotary chuck 1 matches the central axis of the rotary chuck 1 with the central axis of the quartz glass wood 6 as a reference.
しかしながら、上述の修正を施しても、石英ガラスロッ
ド６上に多孔質ガラス体を外付けすると酸水素炎により
石英ガラスロッド６をはじめ回転チャツク１全体も加熱
されるため回転チャツク１自体が熱膨張し石英ガラスロ
ッド６を把持する状態が変化し、この結果石英ガラスロ
ッド６の中心軸が回転チャック１の回転中心軸よりズし
て再び振れ回りが発生するという問題があった。これは
修正後０．０５陣程度であった振れ量が外付は開始後１
〜４鵬程度まで増大するというものであった。ファイバ
化したときのコアの偏心の原因は、他工程にも存在して
おり、外付は工程と１：１の対応はしていないが、外付
は工程の影響としては、振れ回り量５００μｍがコア傷
心Ｅ最大１％程度生じる可能性がある。特に、シングル
モードファイバの場合は、コアの傷心の少ない光ファイ
バが求められるから、上述した程度の振れ回りがあると
きは、シングルモードファイバの形成が難かしくなる。However, even with the above modification, when a porous glass body is attached externally to the quartz glass rod 6, the entire rotary chuck 1 including the quartz glass rod 6 is heated by the oxyhydrogen flame, so the rotary chuck 1 itself expands thermally. However, the state in which the quartz glass rod 6 is gripped changes, and as a result, the central axis of the quartz glass rod 6 deviates from the central axis of rotation of the rotary chuck 1, causing whirling to occur again. This is because the amount of deviation was about 0.05 degrees after the correction, but the amount of deviation was 1 after the start of the external connection.
It was said that it would increase to about 4. The cause of the eccentricity of the core when it is made into a fiber also exists in other processes, and the external part does not have a 1:1 correspondence with the process, but the external part has a whirling amount of 500 μm as a result of the process. However, core wound E may occur in up to 1% of cases. In particular, in the case of a single-mode fiber, an optical fiber with few core flaws is required, so when the above-mentioned amount of whirling occurs, it becomes difficult to form a single-mode fiber.
本発明は、特に回転する心材の外周にガラス微粒子を堆
積し軸方向に成長させる外付は工程において、心材の多
孔質ガラス成長部分の振れ回りをな（シ、光フアイバ母
材の中心軸部に偏心することなく多孔質ガラス体を成長
させることができる光フアイバ母材の製造装置用として
の熱膨張吸収チャックを提供す斯かる目的を達成する本
発明の構成は、円筒状のチャック本体に対し、複数の把
持爪を有するコレットを挿入して軸方向に移動させるこ
とによ抄、前記把持爪を内径方向に収束させて棒状の被
把持体を把持するコレットチャックにおいて、前記把持
爪を内径方向に収束させる方向に付勢する熱膨張吸収用
ばねを設けたことを特徴とするものである。In particular, in the process of externally depositing glass particles on the outer periphery of a rotating core material and growing them in the axial direction, the central axis of the optical fiber base material is To provide a thermal expansion absorbing chuck for use in an optical fiber preform manufacturing apparatus, which is capable of growing a porous glass body without eccentricity, the structure of the present invention achieves the above object. On the other hand, in a collet chuck in which a collet having a plurality of gripping claws is inserted and moved in the axial direction, and the gripping claws are converged in the inner diameter direction to grasp a rod-shaped object, the gripping claws are The present invention is characterized in that a thermal expansion absorbing spring is provided that biases in the direction of convergence.
く作 用〉
高温雰囲気下において、被把持体、チャック本体、コレ
ット等は熱膨張するが、それらの熱膨張差のためこれら
の間にガタが生じやすい。しかし、本発明では熱膨張吸
収用ばねが把持爪を内径方向に収束させる方向に付勢し
ているため、熱膨張差によるガタを吸収して被把持体の
把持状態が確実に維持されることとなる。Function> In a high-temperature atmosphere, the object to be gripped, the chuck body, the collet, etc. expand thermally, but play is likely to occur between them due to the difference in thermal expansion. However, in the present invention, since the thermal expansion absorbing spring biases the gripping claws in the direction of converging in the inner diameter direction, the looseness due to the difference in thermal expansion is absorbed and the gripping state of the gripped object is reliably maintained. becomes.
く実 施 例〉
以下、本発明の実施例について図面を参照して詳細に説
明する。Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図に本発明の第１の実施例を示す。同図に示すよう
に、円筒状のチャック本体１１は駆動回転する中空スピ
ンドル１０の先端に収り付けられると共に複数の把持爪
１４を有するコレット１２がチャック本体１１内に摺動
自在に嵌合されている。ここで、コレット１２は円筒体
をなすと共にその先端部に複数の切れ込み溝２０を刻設
して把持爪１４を形成したものであり、各把持爪１４の
外周部分はテーパ面１５となっている。このテーパ面１
５はチャック本体１１の先端内周と接触しており、従っ
てコレット１２を図中上方へ引き上げると、テーパ面１
５の模作用により、把持爪１４は弾性変形して内径側に
収束することとなる。コレット１２の内側には被把持体
（図示省略）が差し込まれるようになっており、このよ
うに把持爪１４が収束すると被把持体が把持されること
となる。FIG. 1 shows a first embodiment of the present invention. As shown in the figure, a cylindrical chuck body 11 is housed at the tip of a hollow spindle 10 that rotates, and a collet 12 having a plurality of gripping claws 14 is slidably fitted into the chuck body 11. ing. Here, the collet 12 has a cylindrical body and has a plurality of grooves 20 carved in its tip to form gripping claws 14, and the outer peripheral portion of each gripping claw 14 has a tapered surface 15. . This tapered surface 1
5 is in contact with the inner periphery of the tip of the chuck body 11, so when the collet 12 is pulled upward in the figure, the tapered surface 1
5, the gripping claws 14 are elastically deformed and converge toward the inner diameter side. A gripped object (not shown) is inserted into the inside of the collet 12, and when the gripping claws 14 converge in this manner, the gripped object is gripped.
一方、チャック本体１１の先端部外周には円環状の回転
部材１３が螺合すると共にこの回転部材１３の先端小径
部と前記把持爪１４との間に熱膨張吸収用ばね１６が圧
装されている。更に、コレット１２の後端とチャック本
体１１との間にも取外用ばね１７が圧装されてお９、こ
の取外用ばね１７のばね定数は熱膨張吸収用ばね１６の
それよりも小さくなっている。従って、回転部材１３を
ねじ込んで図中上昇させると、取外用ばね１７のばね力
に抗してコレット１２が上昇すると共に熱膨張吸収用ば
ね１６により把持爪１４が図中上方、即ち内径方向に収
束する方向に付勢されることとなる。このため、常温状
態から高温状態へ移行することにより、被把持体、チャ
ック本体１１．コレット１２等チャック全体が熱膨張し
、それらの熱膨張差により、例えば把持爪１４のテーパ
面１５とチャック本体１１との間に隙間が生じても、熱
膨張吸収用ばね１６により把持爪１４が上方に押し込ま
れるため、把持状態が確実に維持されることとなる。On the other hand, an annular rotating member 13 is screwed onto the outer periphery of the tip of the chuck body 11, and a thermal expansion absorbing spring 16 is press-fitted between the small diameter portion of the tip of the rotating member 13 and the gripping claw 14. There is. Furthermore, a removal spring 17 is also press-fitted between the rear end of the collet 12 and the chuck body 11, and the spring constant of this removal spring 17 is smaller than that of the thermal expansion absorption spring 16. There is. Therefore, when the rotating member 13 is screwed in and raised in the figure, the collet 12 rises against the spring force of the removal spring 17, and the gripping claws 14 are moved upward in the figure, that is, in the inner radial direction by the thermal expansion absorbing spring 16. It will be biased in the direction of convergence. Therefore, by transitioning from the room temperature state to the high temperature state, the gripped object, the chuck body 11. Even if the entire chuck, such as the collet 12, expands thermally and a gap is created between the tapered surface 15 of the gripping claw 14 and the chuck body 11 due to the difference in thermal expansion, the gripping claw 14 is Since it is pushed upward, the gripping state is reliably maintained.
この後、高温状態から常温状態へと移行する際、チャッ
ク全体が熱収縮することとなるが、把持爪１４の把持力
が過大となって被把特休の脱着が困難となることはない
。それは、コレット１２の後端側に設けられる取外用ば
ね１７がコレット１２を図中下方に押し下げようとする
ため、回転部材１３を回転させて緩めると、熱膨張吸収
用ばね１６のばね力が開放されると共にコレット１２が
図中下方に押し下げられて把持爪１４が外径方向に広が
るからである。Thereafter, when transitioning from a high temperature state to a normal temperature state, the entire chuck will undergo thermal contraction, but the gripping force of the gripping claws 14 will not become excessive and it will be difficult to attach and detach the gripped special leave. This is because the removal spring 17 provided at the rear end of the collet 12 tries to push the collet 12 downward in the figure, so when the rotating member 13 is rotated and loosened, the spring force of the thermal expansion absorption spring 16 is released. This is because the collet 12 is pushed down in the figure and the gripping claws 14 are expanded in the outer radial direction.
次に、本発明の第２の実施例について第２図を参照して
説明する。本実施例は、回転部材１３に関し取り扱いを
簡素化したものである。即ち、回転部材１３をチャック
本体１１に螺合するのではなく、チャック本体１１に回
転自在に嵌着したものであり、チャック本体１１に突設
された複数の位置決めピン１９を回転部材１３に刻設さ
れた５字状の位置決め溝１８に係合している。従って、
回転部材１３を押し込んで回転させるだけで、被把持体
を把持した状態を維持できることとなる。Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, handling of the rotating member 13 is simplified. That is, the rotating member 13 is not screwed into the chuck body 11, but is rotatably fitted onto the chuck body 11, and a plurality of positioning pins 19 protruding from the chuck body 11 are carved into the rotating member 13. It engages with a five-shaped positioning groove 18 provided therein. Therefore,
By simply pushing in and rotating the rotating member 13, the state in which the object to be gripped can be maintained.
尚、その他の構成は前述した実施例と同様であり、同一
機能を有する部分には同一符号を付して説明を省略する
。Note that the other configurations are the same as those of the above-described embodiment, and parts having the same functions are designated by the same reference numerals and description thereof will be omitted.
上記実施例では、熱膨張吸収ばね１６は把持爪１４の前
方に配置していたが、本発明はこのようなものに限定さ
れるものではない。In the above embodiment, the thermal expansion absorbing spring 16 was arranged in front of the gripping claw 14, but the present invention is not limited to this.
例えば、第３図に示す、第３の実施例のように、把持爪
１４の後方におけるチャック本体１１内に＃１ｗ！張吸
収用ばね１６全圧装し、把持爪１４のテーパ面１５に接
触するテーパブロック２１を押し下げるようにして、把
持爪１４を内径方向に収束するように付勢しても良い。For example, as in the third embodiment shown in FIG. 3, #1w! The tension absorbing spring 16 may be fully loaded to push down the taper block 21 that contacts the tapered surface 15 of the gripping claw 14, thereby urging the gripping claw 14 to converge in the inner radial direction.
本発明は前述した外付は工程におけろ回転チャックとし
て利用でき、石英ガラスロッドの振れ回り量を測定した
結果を表−１に示すように、把持状態が変化しないため
、高温状態に移行しても振れ回り量が増大しないことが
判る。In the present invention, the above-mentioned external attachment can be used as a rotating chuck in the process, and as shown in Table 1, the gripping state does not change, and the quartz glass rod does not shift to a high temperature state as shown in Table 1. It can be seen that the amount of whirl does not increase even if
表−１
〈発明の効果〉
以上、実施例に基づいて具体的に説明したように本発明
は熱膨張吸収用ばねが把持爪を収束する方向に付勢する
ので、チャック本体。Table 1 <Effects of the Invention> As specifically explained above based on the embodiments, in the present invention, the thermal expansion absorbing spring biases the gripping claws in the direction of convergence.
コレット等に熱膨張の差が生じても、その差を吸収して
常に一定の把持状態を維持できる。Even if a difference in thermal expansion occurs in the collet or the like, the difference can be absorbed and a constant gripping state can be maintained at all times.
第１図、第２図、第３図は各々本発明の第１゜第２．第
３の実施例を示す断面図、第４図は従来の光フアイバ製
造方法の外付工程に係り、同図（ａ）は工程開始前、同
図（ｂｌは工程終了後を各々示す説明図である。
図面中、
１は回転チャック、
２は反応容器、
３は燃焼バーナ、
４は排気管、
５は多孔質ガラス体の成長部、
６は石英ガラスロッド、
７は多孔質ガラス体、
１０は中空スピンドル、
１１はチャック本体、
１２はコレット、
１３は回転部材、
１４は把持爪、
１５はチー′パ面、
１６は熱膨張吸収用ばね、
１７は取外用ばね、
１８は位置決め溝、
１９は位置決めピン、
２０は切り込み溝、
２１はテーパブロックである。
ＡＪ１図 第２図
第３図
第４図1, 2, and 3 are the first and second sections of the present invention, respectively. A cross-sectional view showing the third embodiment, and FIG. 4 relate to the external attaching process of a conventional optical fiber manufacturing method, in which (a) is an explanatory diagram showing before the start of the process, and the same figure (bl is an explanatory diagram showing after the process is finished, respectively). In the drawings, 1 is a rotating chuck, 2 is a reaction vessel, 3 is a combustion burner, 4 is an exhaust pipe, 5 is a growth part of a porous glass body, 6 is a quartz glass rod, 7 is a porous glass body, 10 11 is a hollow spindle, 11 is a chuck body, 12 is a collet, 13 is a rotating member, 14 is a gripping claw, 15 is a tipper surface, 16 is a thermal expansion absorption spring, 17 is a removal spring, 18 is a positioning groove, 19 is a positioning pin, 20 is a cut groove, and 21 is a taper block.AJ1 Figure Figure 2 Figure 3 Figure 4
Claims (1)
レットを挿入して軸方向に移動させることにより、前記
把持爪を内径方向に収束させて棒状の被把持体を把持す
るコレットチャックにおいて、前記把持爪を内径方向に
収束させる方向に付勢する熱膨張吸収用ばねを設けたこ
とを特徴とする熱膨張吸収チャック。In the collet chuck in which a collet having a plurality of gripping claws is inserted into a cylindrical chuck body and moved in the axial direction, the gripping claws are converged in an inner radial direction to grip a rod-shaped object to be gripped. A thermal expansion absorbing chuck characterized by being provided with a thermal expansion absorbing spring that biases the gripping claws in a direction to converge in the inner diameter direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22621386A JPS6384804A (en) | 1986-09-26 | 1986-09-26 | Thermal expansion absorption chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22621386A JPS6384804A (en) | 1986-09-26 | 1986-09-26 | Thermal expansion absorption chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6384804A true JPS6384804A (en) | 1988-04-15 |
Family
ID=16841668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22621386A Pending JPS6384804A (en) | 1986-09-26 | 1986-09-26 | Thermal expansion absorption chuck |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6384804A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7137632B2 (en) | 2003-10-27 | 2006-11-21 | Hardinge Inc. | Force limiting workpiece holding device |
| JP2016069199A (en) * | 2014-09-26 | 2016-05-09 | 株式会社フジクラ | Optical fiber spinning device, optical fiber spinning method and optical fiber preform support tool |
| JP2016212426A (en) * | 2011-08-30 | 2016-12-15 | オプセンス インコーポレイテッド | Interface connector handle for disposable guidewire optical connection |
| WO2018150780A1 (en) | 2017-02-15 | 2018-08-23 | 古河電気工業株式会社 | Horizontal lathe |
-
1986
- 1986-09-26 JP JP22621386A patent/JPS6384804A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7137632B2 (en) | 2003-10-27 | 2006-11-21 | Hardinge Inc. | Force limiting workpiece holding device |
| JP2016212426A (en) * | 2011-08-30 | 2016-12-15 | オプセンス インコーポレイテッド | Interface connector handle for disposable guidewire optical connection |
| JP2016069199A (en) * | 2014-09-26 | 2016-05-09 | 株式会社フジクラ | Optical fiber spinning device, optical fiber spinning method and optical fiber preform support tool |
| WO2018150780A1 (en) | 2017-02-15 | 2018-08-23 | 古河電気工業株式会社 | Horizontal lathe |
| US11511357B2 (en) | 2017-02-15 | 2022-11-29 | Furukawa Electric Co., Ltd. | Horizontal lathe |
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