JP2003146682A - Apparatus for manufacturing glass preform and method of manufacturing the same - Google Patents

Apparatus for manufacturing glass preform and method of manufacturing the same

Info

Publication number
JP2003146682A
JP2003146682A JP2001349791A JP2001349791A JP2003146682A JP 2003146682 A JP2003146682 A JP 2003146682A JP 2001349791 A JP2001349791 A JP 2001349791A JP 2001349791 A JP2001349791 A JP 2001349791A JP 2003146682 A JP2003146682 A JP 2003146682A
Authority
JP
Japan
Prior art keywords
base material
glass base
shaft
union
hanging
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
Application number
JP2001349791A
Other languages
Japanese (ja)
Inventor
Mitsukuni Sakashita
光邦 坂下
Kazuichi Yamamura
和市 山村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Priority to JP2001349791A priority Critical patent/JP2003146682A/en
Publication of JP2003146682A publication Critical patent/JP2003146682A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01Manufacture of glass fibres or filaments
    • C03B37/012Manufacture of preforms for drawing fibres or filaments
    • C03B37/014Manufacture 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]
    • C03B37/01486Means for supporting, rotating or translating the preforms being formed, e.g. lathes
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01Manufacture of glass fibres or filaments
    • C03B37/012Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/0126Means for supporting, rotating, translating the rod, tube or preform

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing a glass preform which has a hanging shaft annexed to the apparatus and capable of easily, rapidly and inexpensively being repaired even in case of the failure of the hanging shaft. SOLUTION: The hanging shaft 11 for hanging the glass preform 1 of the apparatus for hanging the glass preform 1 within a heating furnace 4 and heat treating the glass preform is formed by connecting short-size ceramic shafts 12 having female threads at both ends to each other by unions 13 having male threads on their lateral peripheral surfaces to a long size.

Description

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

【0001】[0001]

【発明の属する技術分野】本発明は、大型のガラス母材
を高温で加熱処理する工程において用いられるガラス母
材製造装置及び製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass base material manufacturing apparatus and a manufacturing method used in a step of heating a large glass base material at a high temperature.

【0002】[0002]

【従来の技術】大型のガラス母材は加熱処理されて、例
えば、光ファイバの線引きに都合の良い径サイズを有す
るガラス母材に延伸加工される。図1にガラス母材製造
装置の一例を示す。ガラス母材1は、ガラス母材供給機
構2に支持された垂下シャフト3の下端に垂下され、時間
の経過と共に下方へ移動するガラス母材供給機構2によ
って、加熱炉4に供給される。加熱炉4内にはヒータ5が
設けられている。ガラス母材は1600〜2100℃で加熱軟化
され、延伸される。
2. Description of the Related Art A large glass preform is heat-treated and drawn, for example, into a glass preform having a diameter size convenient for drawing an optical fiber. FIG. 1 shows an example of a glass base material manufacturing apparatus. The glass base material 1 is supplied to the heating furnace 4 by the glass base material supply mechanism 2 which is hung from the lower end of a hanging shaft 3 supported by the glass base material supply mechanism 2 and which moves downward with the passage of time. A heater 5 is provided in the heating furnace 4. The glass base material is softened by heating at 1600 to 2100 ° C and stretched.

【0003】加熱炉4の下方には、細径化されたガラス
母材を引き取る引き取り機構(図示を省略)が設けられ
ている。ガラス母材1の加熱処理の進行と共に、垂下シ
ャフト3もヒータ5に接近するため、垂下シャフト3の温
度もほぼ同様な温度になる。また、ガラス母材1の重量
は、大型のものになると150kgにもなる。このため垂下
シャフト3にはこれに耐える高度の強度と耐熱性が要求
され、これには、通常、ファインセラミック材が用いら
れている。
Below the heating furnace 4, there is provided a take-up mechanism (not shown) for taking up the glass base material having a reduced diameter. As the heating process of the glass base material 1 progresses, the hanging shaft 3 also approaches the heater 5, so that the temperature of the hanging shaft 3 becomes substantially the same. Further, the weight of the glass base material 1 becomes as large as 150 kg when it becomes large. For this reason, the hanging shaft 3 is required to have a high degree of strength and heat resistance to withstand this, and normally a fine ceramic material is used for this.

【0004】図8に、垂下シャフト3の構造の一例を示
す。垂下シャフト3は、図9に示すような一端にメネ
ジ、他端にオネジを有する短尺セラミックシャフト21を
繋ぎ合わせて構成されている。セラミックス製品は、粉
末を圧縮成型した後、焼成して製造されるため、長尺品
の製造は非常に困難である。このため、長尺の垂下シャ
フト3を得るには、短尺品を複数個製造し、これをつな
ぎ合わせて、図8に示したような垂下シャフト3として
いる。例えば、長さ210mmの短尺セラミックシャフト2
1を12本繋ぎ合わせることによって、全長2520mmの垂
下シャフト3を得ている。
FIG. 8 shows an example of the structure of the hanging shaft 3. The hanging shaft 3 is configured by connecting together a short ceramic shaft 21 having a female screw at one end and a male screw at the other end as shown in FIG. Since a ceramic product is manufactured by compressing powder and then firing it, it is very difficult to manufacture a long product. Therefore, in order to obtain the long hanging shaft 3, a plurality of short products are manufactured, and these are joined together to form the hanging shaft 3 as shown in FIG. For example, 210 mm long ceramic shaft 2
By connecting 12 1s, a hanging shaft 3 with a total length of 2520mm is obtained.

【0005】[0005]

【発明が解決しようとする課題】装置が正常に操作され
ている限りにおいては問題ないが、作業者の誤操作など
が原因でまれに垂下シャフト3が破損することがある。
その場合、垂下シャフト3は、これを構成している短尺
セラミックシャフト21のネジ部で折れる。図10に破損
した垂下シャフトを示す。破損短尺セラミックシャフト
22は、オネジ部で折損しており、折損オネジ23a,23bが
メネジ部の中にはまり込んで容易には抜けない状態とな
っている。
Although there is no problem as long as the device is normally operated, the hanging shaft 3 may be rarely damaged due to an erroneous operation by an operator.
In that case, the hanging shaft 3 is broken by the threaded portion of the short ceramic shaft 21 constituting the hanging shaft 3. FIG. 10 shows a broken hanging shaft. Broken short ceramic shaft
The male thread portion 22 is broken, and the broken male threads 23a and 23b are fitted in the female thread portion and cannot be easily removed.

【0006】破損短尺セラミックシャフト22は、補修を
施せば再利用可能であるが、補修には非常に時間がかか
る。図11に、破損短尺セラミックシャフトの補修方法
の概略を示す。先ず、メネジ部から折損オネジ23bを取
り出さなければならないが、これは通常の作業工具では
行えない。これまで折損オネジ23bの取り出し作業は、
セラミック加工用の工作機械で折損オネジ23bに軸方向
に孔をあけ、この孔に特殊な治具を差し込んで取り出し
ていた。折損して消失したオネジは、破損短尺セラミッ
クシャフト22の直胴部を削り、オネジを再生する必要が
ある。図11では、メネジ部から折損オネジ23bを取り
出した後、オネジ消失端側の直胴部を研削して再生オネ
ジ24を形成し、補修短尺セラミックシャフト25としてい
る。
The broken short ceramic shaft 22 can be reused if repaired, but repair takes a very long time. FIG. 11 shows an outline of a method of repairing a broken short ceramic shaft. First, the broken male screw 23b must be taken out from the female screw portion, but this cannot be done with a normal work tool. Until now, the work of taking out the broken male screw 23b has been
With a machine tool for ceramic processing, a hole is made in the broken male screw 23b in the axial direction, and a special jig is inserted into this hole and taken out. The male screw that has broken and disappeared needs to be regenerated by scraping the straight body portion of the damaged short ceramic shaft 22. In FIG. 11, after the broken male screw 23b is taken out from the female screw portion, the straight body portion on the male screw disappearing end side is ground to form a recycled male screw 24, which is a repaired short ceramic shaft 25.

【0007】このように、破損短尺セラミックシャフト
22の補修は簡単でなく、専門のメーカーへ依頼しなけれ
ばならず、補修には非常に長い時間とコストをかけてい
た。また、補修を一度行えば、再生オネジ24の長さだけ
短尺セラミックシャフトが短くなるため、短尺セラミッ
クシャフトの補修は何回も行えない。上記事情により、
垂下シャフト3が破損した場合、速やかに垂下シャフト3
を修復し装置を再稼動させるには、短尺セラミックシャ
フト21の予備品を多く保管している必要があった。
As described above, the broken short ceramic shaft
Repairing 22 was not easy and had to ask a specialized manufacturer, and it took a very long time and cost to repair. Further, once the repair is performed, the short ceramic shaft is shortened by the length of the recycled male screw 24, so that the short ceramic shaft cannot be repaired many times. Due to the above circumstances,
If the hanging shaft 3 is damaged, immediately
It was necessary to store a large number of spare parts of the short ceramic shaft 21 in order to repair and restart the device.

【0008】このように、垂下シャフトが作業者の誤操
作などで破損すると、その復旧には特殊な工作機械を必
要とするため専門のメーカーへ依頼しなければならず、
非常に時間がかかるうえ、コスト的にも無視できないも
のがあった。このような問題は、ガラス母材の製造工程
で使用される延伸炉や脱水炉、焼結炉等の高温で処理さ
れるガラス母材製造装置において発生していた。本発明
は、ガラス母材製造装置に付設される垂下シャフトが破
損した場合でも、容易に短時間でかつ安価に修復できる
垂下シャフトを備えたガラス母材製造装置及び製造方法
を提供することを課題としている.。
As described above, when the hanging shaft is damaged due to an erroneous operation by an operator, a special machine tool is required to restore the shaft, so a specialized manufacturer must be requested.
It took a very long time, and there were things that could not be ignored in terms of cost. Such a problem has occurred in a glass base material manufacturing apparatus that is processed at a high temperature, such as a drawing furnace, a dehydration furnace, or a sintering furnace used in the glass base material manufacturing process. It is an object of the present invention to provide a glass base material manufacturing apparatus and a manufacturing method including a hanging shaft that can be easily and quickly repaired at low cost even if the hanging shaft attached to the glass base material manufacturing apparatus is damaged. And ...

【0009】[0009]

【課題を解決するための手段】本発明のガラス母材製造
装置は、ガラス母材を加熱炉内に垂下し加熱処理する装
置において、該ガラス母材を垂下する垂下シャフトが、
両端にメネジを有する短尺セラミックシャフト同士を、
側周面にオネジを有するユニオンで接続して長尺化され
た構成からなることを特徴としている。該ユニオンは、
この軸方向に貫通孔を設け、その表面を微紛研磨してお
くのが好ましい。
The glass base material manufacturing apparatus of the present invention is an apparatus for suspending a glass base material in a heating furnace and performing heat treatment, wherein the suspending shaft for suspending the glass base material is
Short ceramic shafts with female threads on both ends,
It is characterized in that it is configured to be elongated by connecting with a union having a male thread on the side peripheral surface. The union
It is preferable to form a through hole in the axial direction and finely polish the surface.

【0010】本発明のガラス母材製造装置は、上記垂下
シャフトを備え、さらに、少なくともガラス母材を加熱
軟化させる加熱炉、ガラス母材を加熱炉へ供給する供給
機構及び加熱炉で加熱軟化されたガラス母材を引き取る
引き取り機構を備えた構成とするのが好ましい。また、
本発明のガラス母材製造方法は、上記構成からなるガラ
ス母材製造装置を用いて、ガラス母材を加熱処理するも
のである。
The glass base material manufacturing apparatus of the present invention comprises the above hanging shaft, and is further heated and softened by a heating furnace for heating and softening at least the glass base material, a supply mechanism for supplying the glass base material to the heating furnace, and a heating furnace. It is preferable that the glass base material has a take-up mechanism for taking the glass base material. Also,
The glass base material manufacturing method of the present invention heat-treats a glass base material using the glass base material manufacturing apparatus configured as described above.

【0011】[0011]

【発明の実施の形態】本発明者等は、垂下シャフトの破
損状態を詳細に調査した結果、破損が主に短尺セラミッ
クシャフトのオネジの部分であり、メネジが破損するの
は非常にまれであることが分かった。このような知見に
さらに工夫を加えて本発明を達成したものであり、すな
わち、本発明のガラス母材製造装置は、ガラス母材を加
熱炉内に垂下する垂下シャフトとして、両端にメネジを
設けたユニオン式短尺セラミックシャフト同士を、側周
面にオネジを有するシャフトユニオンで接続して長尺化
したものを使用するものである。本発明は、このような
構成からなるユニオン式垂下シャフトを使用するため、
ユニオン式垂下シャフトが破損した場合であっても、シ
ャフトユニオンのみの破損で済み、オネジの折損部はメ
ネジ部から容易に取り出され、ユニオン式短尺セラミッ
クシャフトは再利用可能となる。このように本発明の構
成を使用することで、延伸炉や脱水炉、焼結炉等の高温
炉でシャフトが破損しても、容易に短時間で安価に修復
することができる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a result of detailed investigations by the inventors of the present invention on the state of breakage of the drooping shaft, the damage is mainly in the male thread of the short ceramic shaft, and it is extremely rare for the female thread to break. I found out. The present invention has been achieved by further devising such knowledge, that is, the glass base material manufacturing apparatus of the present invention has female threads at both ends as a hanging shaft for hanging the glass base material in the heating furnace. Further, the union type short ceramic shafts are connected to each other by a shaft union having a male thread on the side peripheral surface thereof to be elongated. Since the present invention uses the union-shaped hanging shaft configured as described above,
Even if the union-type hanging shaft is damaged, only the shaft union needs to be damaged, and the broken part of the male screw can be easily taken out from the female-threaded part, and the union-type short ceramic shaft can be reused. As described above, by using the configuration of the present invention, even if the shaft is damaged in a high temperature furnace such as a drawing furnace, a dehydration furnace, or a sintering furnace, it can be easily and inexpensively restored in a short time.

【0012】[0012]

【実施例】以下、本発明によるユニオン式垂下シャフト
について、図2〜図7を用いてさらに詳細に説明する
が、本発明はこれらの態様に限定されるものではない。
図2は、本発明のガラス母材製造装置で使用されるユニ
オン式垂下シャフト11の構成を示す概略断面図であり、
図3に示すユニオン式短尺セラミックシャフト12同士
が、図4に示すシャフトユニオン13によって接続され、
長尺化されている。なお、図4において、(a)は概略
正面図であり、(b)は概略側面図である。
EXAMPLES The union hanging shaft according to the present invention will be described below in more detail with reference to FIGS. 2 to 7, but the present invention is not limited to these modes.
FIG. 2 is a schematic sectional view showing the structure of the union-type hanging shaft 11 used in the glass base material manufacturing apparatus of the present invention.
Union type short ceramic shafts 12 shown in FIG. 3 are connected by a shaft union 13 shown in FIG.
It is lengthened. In addition, in FIG. 4, (a) is a schematic front view and (b) is a schematic side view.

【0013】ユニオン式短尺セラミックシャフト12は、
図3に示すように、その両端にメネジ14a,4bを有して
おり、これらのメネジ部に、図4に示す側周面にオネジ
を有するシャフトユニオン13をねじ込むことで、ユニオ
ン式短尺セラミックシャフト12同士が接続され、長尺化
される。シャフトユニオン13には、この軸方向と平行に
回転治具挿入口15となる貫通孔が設けられている。この
貫通孔の数は、シャフトユニオン13の強度及び加工性の
観点から少ない方が望ましく1〜3個、より好ましくは
取り出し作業が容易となる2個である。また、貫通孔の
形状は、多角形でも良いが、加工の容易な円形が望まし
い。
The union type short ceramic shaft 12 is
As shown in FIG. 3, female unions 14a and 4b are provided at both ends, and the shaft union 13 having male threads on the side peripheral surface shown in FIG. 12 pieces are connected and lengthened. The shaft union 13 is provided with a through hole serving as a rotary jig insertion port 15 in parallel with the axial direction. From the viewpoint of the strength and workability of the shaft union 13, it is desirable that the number of the through holes be as small as 1 to 3, and more preferably 2 to facilitate the taking-out work. The shape of the through hole may be a polygon, but a circular shape that is easy to process is desirable.

【0014】図5(a),(b)は、ユニオン式垂下シ
ャフト11が破損した場合の状態を示し、折損ユニオン16
がユニオン式短尺セラミックシャフト12のメネジの中に
嵌まり込んでいる。この場合も上述の如く、オネジが破
損してメネジが無事なことが殆どである。折損ユニオン
16は、この軸方向に貫通した回転治具挿入口15を有する
ため、折損ユニオン16を軸方向から見ると、図5(b)
に示すように、回転治具挿入口15が視認される。この回
転治具挿入口15に、図6に示す回転治具17を挿入し、折
損ユニオン16を回転させると、容易に折損ユニオン16を
メネジ部から取り出すことができる。なお、図6におい
て、(a)は概略正面図であり、(b)はその概略側面
図である。
FIGS. 5 (a) and 5 (b) show a state in which the union hanging shaft 11 is broken.
Is fitted into the female thread of the union type short ceramic shaft 12. Also in this case, as described above, the male screw is almost always damaged and the female screw is safe. Broken union
Since 16 has the rotary jig insertion port 15 penetrating in the axial direction, when the breakage union 16 is viewed from the axial direction, FIG.
As shown in, the rotary jig insertion port 15 is visually recognized. When the rotary jig 17 shown in FIG. 6 is inserted into the rotary jig insertion port 15 and the breakable union 16 is rotated, the breakable union 16 can be easily taken out from the female screw portion. In addition, in FIG. 6, (a) is a schematic front view and (b) is a schematic side view thereof.

【0015】図7は、ユニオン式短尺セラミックシャフ
ト12とシャフトユニオン13のネジ部の嵌合状態を示す部
分拡大図である。ファインセラミック材は非常に硬度が
高いため、図7(a)に示すように、ネジ部で嵌合させ
てもネジ山先端18のある一点での点接触となり、ネジ山
の先端に応力が集中するため、チッピングなどが生じ
て、ネジ山先端18が微小に欠ける場合がある。チッピン
グが発生すると、その破片がネジ山の隙間に挟まり、ネ
ジが回転しなくなることがある。
FIG. 7 is a partially enlarged view showing a fitting state of the screw parts of the union type short ceramic shaft 12 and the shaft union 13. Since the fine ceramic material has extremely high hardness, as shown in Fig. 7 (a), even if the fine ceramic material is fitted in the threaded portion, point contact occurs at one point with the thread tip 18, and stress concentrates at the tip of the thread. Therefore, chipping or the like may occur, and the screw thread tip 18 may be chipped slightly. When chipping occurs, the fragments may be caught in the clearance between the threads and the screw may not rotate.

【0016】このようなネジ山先端のチッピングを防ぐ
には、ネジ山先端の面取りが有効である。本発明では、
シャフトユニオン13のネジ山先端を微紛研磨、例えば、
サンドブラスト処理することにより、ネジ山先端の面取
りを行っている。図7(b)に、サンドブラストしたシ
ャフトユニオン13とユニオン式短尺セラミックシャフト
12が結合したネジ部を拡大して示している。面取りされ
たネジ山先端19には、応力が集中せず、チッピングが起
こりにくくなっている。なお、本発明のガラス母材製造
装置は、多孔質ガラス母材の脱水や焼結、透明ガラス
化、あるいは太径のガラス母材を光ファイバの線引きに
都合の良い径に延伸する延伸加工等に適用できる。
In order to prevent such chipping of the screw thread tip, chamfering of the screw thread tip is effective. In the present invention,
Finely grind the thread tip of the shaft union 13, for example,
The tip of the screw thread is chamfered by sandblasting. Figure 7 (b) shows sandblasted shaft union 13 and union type short ceramic shaft.
The threaded portion where 12 is joined is shown enlarged. Stress is not concentrated on the chamfered screw thread tip 19, and chipping is less likely to occur. The glass preform manufacturing apparatus of the present invention is a dehydration or sintering of a porous glass preform, a transparent vitrification, or a drawing process for drawing a large-diameter glass preform to a diameter convenient for drawing an optical fiber, etc. Applicable to

【0017】[0017]

【発明の効果】本発明のガラス母材製造装置は、垂下シ
ャフトを上記構成としたことにより、垂下シャフトが破
損した場合、破損部をネジ部で取り外し交換することで
容易かつ短時間に復旧できる。垂下シャフト全体が破損
した場合でも主に破損するのはシャフトユニオンであ
り、短尺セラミックシャフトのメネジの中にはまり込ん
だ折損ユニオンは、簡単な工具で容易に取り出すことが
できる。修復はシャフトユニオンの交換のみで済み、短
尺セラミックシャフトは再利用できるため、従来のよう
に予備品を多く保管している必要はなくなり、コスト低
減に寄与する。
In the glass base material manufacturing apparatus of the present invention, since the hanging shaft has the above-described structure, when the hanging shaft is damaged, the damaged part can be easily and quickly recovered by removing and replacing the damaged part. . Even if the entire hanging shaft is broken, it is the shaft union that mainly breaks. The broken union that fits inside the female thread of the short ceramic shaft can be easily taken out with a simple tool. Since repair is only required to replace the shaft union, and the short ceramic shaft can be reused, there is no need to store many spare parts as in the past, which contributes to cost reduction.

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

【図1】 ガラス母材製造装置の一例を示す概略説明図
である。
FIG. 1 is a schematic explanatory view showing an example of a glass base material manufacturing apparatus.

【図2】 本発明のガラス母材製造装置で使用されるユ
ニオン式垂下シャフトの構成の概略を示す概略断面図で
ある。
FIG. 2 is a schematic cross-sectional view showing the outline of the configuration of a union-type hanging shaft used in the glass base material manufacturing apparatus of the present invention.

【図3】 本発明で使用されるユニオン式垂下シャフト
を構成するユニオン式短尺セラミックシャフトの概略断
面図である。
FIG. 3 is a schematic cross-sectional view of a union type short ceramic shaft that constitutes the union type hanging shaft used in the present invention.

【図4】 本発明によるユニオン式短尺セラミックシャ
フト同士の接続に使用されるシャフトユニオンを示し、
(a)は概略正面図であり、(b)は概略側面図であ
る。
FIG. 4 shows a shaft union used for connecting union type short ceramic shafts according to the present invention,
(A) is a schematic front view, (b) is a schematic side view.

【図5】 ユニオン式垂下シャフトの破損状態を示し、
(a)はその概略断面図であり、(b)は破損した折損
ユニオンを側方から示す概略図である。
FIG. 5 shows a broken state of the union-type hanging shaft,
(A) is the schematic sectional drawing, and (b) is the schematic which shows the broken union from the side.

【図6】 折損ユニオンを取り出すための回転治具を示
し、(a)は概略正面図であり、(b)はその概略側面
図である。
FIG. 6 shows a rotary jig for taking out a broken union, (a) is a schematic front view, and (b) is a schematic side view thereof.

【図7】 (a),(b)は、ユニオン式短尺セラミッ
クシャフトとシャフトユニオンのネジ部の嵌合状態を示
す部分拡大図であり、(a)はブラスト処理されていな
いシャフトユニオンを示し、(b)はブラスト処理され
たシャフトユニオンを示している。
7 (a) and 7 (b) are partially enlarged views showing a fitting state of a union type short ceramic shaft and a screw part of a shaft union, and FIG. 7 (a) shows a shaft union which has not been blasted, (B) shows the blasted shaft union.

【図8】 従来の垂下シャフトの構成を示す概略断面図
である。
FIG. 8 is a schematic sectional view showing the structure of a conventional hanging shaft.

【図9】 従来の短尺セラミックシャフトを示す概略断
面図である。
FIG. 9 is a schematic sectional view showing a conventional short ceramic shaft.

【図10】 従来の垂下シャフトの破損状態を示す概略
断面図である。
FIG. 10 is a schematic cross-sectional view showing a damaged state of a conventional hanging shaft.

【図11】 従来の短尺セラミックシャフトの補修状態
を示す概略断面図である。
FIG. 11 is a schematic cross-sectional view showing a repaired state of a conventional short ceramic shaft.

【符号の説明】[Explanation of symbols]

1.……ガラス母材、 2.……ガラス母材供給機構、 3.……垂下シャフト、 4.……加熱炉、 5.……ヒータ、 11.……ユニオン式垂下シャフト、 12.……ユニオン式短尺セラミックシャフト, 13.……シャフトユニオン、 14 a,14b.…メネジ、 15.……回転治具挿入口、 16.……折損ユニオン、 17.……回転治具、 18.……ネジ山先端、 19.……面取りされたネジ山先端、 21.……短尺セラミックシャフト、 22.……破損短尺セラミックシャフト、 23 a,23b…折損オネジ、 24.……再生オネジ、 25.……補修短尺セラミックシャフト。 1. ...... Glass base material, 2. ...... Glass base material supply mechanism, 3. ...... Hanging shaft, 4. ……heating furnace, 5. ……heater, 11. ...... Union hanging shaft, 12. ...... Union type short ceramic shaft, 13. ...... Shaft union, 14a, 14b. … Female thread, 15. ...... Rotating jig insertion port, 16. …… Breaking Union, 17. ...... Rotating jig, 18. ...... The tip of the screw thread, 19. ...... Chamfered thread tip, twenty one. ...... Short ceramic shaft, twenty two. ...... Damaged short ceramic shaft, 23 a, 23 b ... Broken male screw, twenty four. ...... Reproduction male screw, twenty five. …… Repair short ceramic shaft.

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 ガラス母材を加熱炉内に垂下し加熱処理
する装置において、該ガラス母材を垂下する垂下シャフ
トが、両端にメネジを有する短尺セラミックシャフト同
士を、側周面にオネジを有するユニオンで接続して長尺
化された構成からなることを特徴とするガラス母材製造
装置。
1. An apparatus for suspending a glass base material in a heating furnace for heat treatment, wherein the suspending shaft for suspending the glass base material has short ceramic shafts having female threads at both ends and male threads on the side peripheral surface. An apparatus for manufacturing a glass preform, characterized in that the glass base material has a lengthened structure connected by a union.
【請求項2】 ユニオンの軸方向に貫通孔が設けられて
いる請求項1に記載のガラス母材製造装置。
2. The glass base material manufacturing apparatus according to claim 1, wherein a through hole is provided in the axial direction of the union.
【請求項3】 ユニオンの表面が微紛研磨されている請
求項1又は2に記載のガラス母材製造装置。
3. The glass base material manufacturing apparatus according to claim 1, wherein the surface of the union is finely ground.
【請求項4】 少なくとも、ガラス母材を加熱軟化させ
る加熱炉、ガラス母材を加熱炉へ供給する供給機構及び
加熱炉で加熱軟化されたガラス母材を引き取る引き取り
機構を備えている請求項1乃至3のいずれかに記載のガ
ラス母材製造装置。
4. At least a heating furnace for heating and softening the glass base material, a supply mechanism for supplying the glass base material to the heating furnace, and a take-up mechanism for picking up the glass base material heated and softened in the heating furnace. 4. The glass base material manufacturing apparatus according to any one of 1 to 3.
【請求項5】 請求項1乃至4のいずれかに記載のガラ
ス母材製造装置を用いて、ガラス母材を加熱処理するこ
とを特徴とするガラス母材製造方法。
5. A glass base material manufacturing method, wherein the glass base material is heat-treated by using the glass base material manufacturing apparatus according to any one of claims 1 to 4.
JP2001349791A 2001-11-15 2001-11-15 Apparatus for manufacturing glass preform and method of manufacturing the same Pending JP2003146682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001349791A JP2003146682A (en) 2001-11-15 2001-11-15 Apparatus for manufacturing glass preform and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001349791A JP2003146682A (en) 2001-11-15 2001-11-15 Apparatus for manufacturing glass preform and method of manufacturing the same

Publications (1)

Publication Number Publication Date
JP2003146682A true JP2003146682A (en) 2003-05-21

Family

ID=19162408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001349791A Pending JP2003146682A (en) 2001-11-15 2001-11-15 Apparatus for manufacturing glass preform and method of manufacturing the same

Country Status (1)

Country Link
JP (1) JP2003146682A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110451791A (en) * 2019-08-13 2019-11-15 江苏斯德雷特通光光纤有限公司 A kind of prefabricated rods docking lathe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60108808U (en) * 1983-12-27 1985-07-24 富士通株式会社 screw
JPS61146352A (en) * 1984-12-18 1986-07-04 川崎重工業株式会社 Vertical mill
JPS62167236A (en) * 1986-01-16 1987-07-23 Sumitomo Electric Ind Ltd Device for drawing optical fiber base material
JPH0681826A (en) * 1992-06-17 1994-03-22 Aerospat Soc Natl Ind Screw and bolt made of composite material composed of ceramic matrix reinforced by heat-resistant fiber
JP3017706U (en) * 1995-05-08 1995-11-07 永大化工株式会社 Pipe connection device
JP2001214535A (en) * 2000-02-02 2001-08-10 Ishikawajima Constr Materials Co Ltd Insert apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60108808U (en) * 1983-12-27 1985-07-24 富士通株式会社 screw
JPS61146352A (en) * 1984-12-18 1986-07-04 川崎重工業株式会社 Vertical mill
JPS62167236A (en) * 1986-01-16 1987-07-23 Sumitomo Electric Ind Ltd Device for drawing optical fiber base material
JPH0681826A (en) * 1992-06-17 1994-03-22 Aerospat Soc Natl Ind Screw and bolt made of composite material composed of ceramic matrix reinforced by heat-resistant fiber
JP3017706U (en) * 1995-05-08 1995-11-07 永大化工株式会社 Pipe connection device
JP2001214535A (en) * 2000-02-02 2001-08-10 Ishikawajima Constr Materials Co Ltd Insert apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110451791A (en) * 2019-08-13 2019-11-15 江苏斯德雷特通光光纤有限公司 A kind of prefabricated rods docking lathe
CN110451791B (en) * 2019-08-13 2021-10-22 江苏斯德雷特通光光纤有限公司 Prefabricated excellent butt joint lathe

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