JPS59201341A - Sealing of bulb - Google Patents
Sealing of bulbInfo
- Publication number
- JPS59201341A JPS59201341A JP7503183A JP7503183A JPS59201341A JP S59201341 A JPS59201341 A JP S59201341A JP 7503183 A JP7503183 A JP 7503183A JP 7503183 A JP7503183 A JP 7503183A JP S59201341 A JPS59201341 A JP S59201341A
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- stem
- flare portion
- burner
- open end
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/34—Joining base to vessel
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は管球におけるガラス管の開口端をステムにより
封止する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for sealing the open end of a glass tube in a bulb with a stem.
けい光ランプや白熱電球は、ガラス管の開口端をステム
により溶着封止しであることは知られている。従来のこ
の種の封止方法は、ガラス管の開口端からこの開口端内
径よりも小さなフレア径を有するステムをガラス管内部
に挿入し。It is known that fluorescent lamps and incandescent lamps are made by welding and sealing the open end of a glass tube with a stem. In this type of conventional sealing method, a stem having a flare diameter smaller than the inner diameter of the open end is inserted into the glass tube from the open end thereof.
ガラス管外周面をバーナによりて加熱軟化させることに
より、ガラス管の縮径にもとづきステムと接触させて両
者を溶着させるか、またはガラス管の開口端を予め縮径
成形しておき、この開口端にステムのフレア部を当接さ
せて両者をバーナにより同時に加熱することにより封止
していた。By heating and softening the outer peripheral surface of the glass tube with a burner, the glass tube can be brought into contact with the stem and welded together based on the diameter of the glass tube, or the open end of the glass tube may be formed to reduce its diameter in advance, and the open end may be welded to the stem. Sealing was achieved by bringing the flared portion of the stem into contact with the two and heating both at the same time with a burner.
しかしながら前者の方法は、ガラス管の内径およびステ
ムの外径のばらつきにより両者のクリアランスが一定と
ならないからガラス管の縮径具合にばらつきを生じ一定
形状の封止部が得難いとともに、ガラス管を外周から加
熱するのでバーナの占めるスイースが大きくなり装置が
大形化する欠点があった。また後者の場合には、予めガ
ラス管の開口端を縮径加工するので、工程の増加を招く
とともに、ステムをガラス管の開口端に押圧して加熱す
るので、この抑圧によってクラックを発生することがあ
り製品歩留まりが低下するなどの不艮合があった。However, with the former method, the clearance between the two is not constant due to variations in the inner diameter of the glass tube and the outer diameter of the stem, which causes variations in the degree of diameter reduction of the glass tube, making it difficult to obtain a sealed part with a constant shape. Since the heat is heated from the ground, the swiss occupied by the burner becomes large, resulting in an increase in the size of the device. In the latter case, the diameter of the open end of the glass tube is reduced in advance, which increases the number of steps, and since the stem is pressed against the open end of the glass tube and heated, cracks may occur due to this suppression. There were some inconveniences such as a drop in product yield.
本発明はこのような事情にもとづきなされたもので、そ
の目的とするところは、ガラス管およびステムに寸法ば
らつきがあっても一定の封止形状が得られるとともに、
装置が小形化でき、しかも工程が簡単となって歩留まり
も向上する管球の封止方法を提供しようとするものであ
る。The present invention was made based on the above circumstances, and its purpose is to obtain a constant sealing shape even if there are dimensional variations in the glass tube and stem, and to
The object of the present invention is to provide a method for sealing a tube, which allows the device to be miniaturized, the process to be simplified, and the yield to be improved.
本発明は、ガラス管の内径よりも大きなフレア径を有す
るステムを予め準備し、この大径なフレア部をバーナに
よって加熱軟化して上記ガラス管の開口端に押し込むよ
うにし、しかも上記フレア部を加熱したバーナをそのま
ま使用して上記押し込まれたステムとガラス管とを溶着
させるようにしたことを特徴とするものである。In the present invention, a stem having a flare diameter larger than the inner diameter of the glass tube is prepared in advance, and the large diameter flare portion is heated and softened by a burner and pushed into the open end of the glass tube. The invention is characterized in that the pushed-in stem and glass tube are welded together using the heated burner as is.
以下本発明の一実施例を第１図ないし第５図にもとづき
説明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.
本実施例のガラス管１は直管形けい光ランプなどに団用
される直状管であり、内径ｄなる寸法を有し、開口端２
を下向きとした鉛直姿勢となるようにしてチャック３で
支持される。The glass tube 1 of this embodiment is a straight tube commonly used in straight tube fluorescent lamps, etc., and has an inner diameter d, and an open end 2.
It is supported by the chuck 3 in a vertical position with the side facing downward.
ステム４はフレア部５、排気管６、リード線７．７に接
続されたフィラメント８′（ｉ−備えており、上記フレ
ア部５の外径りは予め上記ガラス管Ｉの内径ｄよりも大
径に形成されている。ステム４のフレア部５はステムホ
ルダ１０に支承されており、このステムホルダ１０はヘ
ッド１１に取付けられている。ステムホルダＩＯには、
フレア部５から寸法ｔだけ離間してバーナＩ２が固定さ
れており、このｉＲ−す１２には上向きに所定の開き角
θを有して炎孔、ｆｌ１３・・・が形成されている。炎
孔１．９・・・は）々−すＩ２の上面において円環状に
配置され、この炎孔１３から噴射される炎はフレア部５
の外周に向かうようになっている。炎孔１３はヘッド１
１に形成されたガス供給通路Ｉ４に通じている。排気管
６はステムホルダ１０内を挿通され、ヘッド１１に取着
されたゴムチャックＩ５により気密が保たれて排気通路
１６に通じている。この排気管６は、ステム４をガラス
管１に封止したのちに、ガラス管１内全排気するために
使用されるもので、上記排気通路１７に接続された図示
しない真空ポンプによって排気が行われる。The stem 4 includes a flared part 5, an exhaust pipe 6, and a filament 8' (i-) connected to a lead wire 7. The flare portion 5 of the stem 4 is supported by a stem holder 10, which is attached to the head 11.The stem holder IO has a
A burner I2 is fixed at a distance t from the flare portion 5, and flame holes fl13 are formed in the iR-seat 12 with a predetermined upward opening angle θ. The flame holes 1.9... are arranged in an annular shape on the upper surface of each I2, and the flame injected from these flame holes 13 flows into the flare part 5.
It is directed towards the outer periphery of the area. Flame hole 13 is head 1
It communicates with a gas supply passage I4 formed in 1. The exhaust pipe 6 is inserted through the stem holder 10, and is kept airtight by a rubber chuck I5 attached to the head 11, and communicates with the exhaust passage 16. This exhaust pipe 6 is used to completely exhaust the inside of the glass tube 1 after sealing the stem 4 in the glass tube 1, and the exhaust is performed by a vacuum pump (not shown) connected to the exhaust passage 17. be exposed.
上記のごときステムホルダＸＯに支持されたステム４は
、ガラス管ｌの下方にガラス管１と距離りだけ離間して
対向位置される。この状態でバーナ１２によりフレア部
５の周縁を加熱すると、このフレア部５の周縁部が軟化
され自重により第２図のごとき「だれ」５′を生じ、外
径りが若干小さくなる。The stem 4 supported by the stem holder XO as described above is positioned below the glass tube 1 and facing the glass tube 1 with a distance therebetween. When the periphery of the flared portion 5 is heated by the burner 12 in this state, the periphery of the flared portion 5 is softened and a ``sag''5' as shown in FIG. 2 is produced due to its own weight, and the outer diameter becomes slightly smaller.
このような周縁部の軟化ののち、ヘッドＩＩを上昇させ
、ステムホルダ１０内ノＺ−すＩ２ととも、にステム４
を一体的に上昇させる。なお、５−
ヘッドＩＩを上昇させる代りに、チャック３を介してガ
ラス管１を下降させてもよい。After the peripheral edge part has softened in this manner, the head II is raised, and the stem 4 is moved along with the nozzle I2 in the stem holder 10.
increase in an integrated manner. Note that the glass tube 1 may be lowered via the chuck 3 instead of raising the 5-head II.
ステム４の上昇によりこのステム４はガラス管Ｉ内へ挿
入され、この際軟化状態のフレア部５はガラス管Ｉの開
口端２に当って押し込まれる。このためフレア部５の周
縁部は第３図のごとく、ガラス管Ｉの内面形状になじむ
ように変形され、ガラス管Ｉの内面に密接する。ガラス
管Ｉの開口端２とフレア部５の「だれ」変形部の端縁が
一致した位置でステム４の上昇を停止する。この状態で
さらにこれらガラス管１とフレア部５をバーナ１２によ
り加熱すると両者が同時に溶融され、よって第４図のご
とき溶着される。したがってガラス管１の封止が完了す
るものである。As the stem 4 rises, the stem 4 is inserted into the glass tube I, and at this time, the softened flare portion 5 hits the open end 2 of the glass tube I and is pushed in. For this reason, the peripheral edge of the flared portion 5 is deformed to conform to the shape of the inner surface of the glass tube I, as shown in FIG. 3, and comes into close contact with the inner surface of the glass tube I. The rise of the stem 4 is stopped at a position where the open end 2 of the glass tube I and the edge of the "sag" deformed portion of the flared portion 5 coincide. In this state, when the glass tube 1 and the flare portion 5 are further heated by the burner 12, they are simultaneously melted and welded together as shown in FIG. 4. Therefore, the sealing of the glass tube 1 is completed.
このような封止方法によれば、ステム４のフレア径りを
、ガラス管１の内径ｄより大きく成形しておけば、フレ
ア部５が軟化された状態でガラス管！内に押し込まれる
ものであるため、ガラス管１の内径ばらつきやフレア部
５の外径６−
ばらつきが生じてもＤ＞ｄの関係さえ満足しておれば、
確実な封止を行うことができ、クラックの発生を生じる
ことなく封止部がほぼ一定形状となる。しかもフレア部
５を予め軟化させるバーナ１２により、ガラス管Ｉとフ
レア部５の溶着を行うので、バーナ１２は単一ですむば
かりでなく、バーナ１２をステム４と一体的に上昇させ
ればよいので、工程が簡単となる。またバーナ１２はス
テムの下方に配置され上向きの炎孔Ｉ３によって加熱す
るから大きなスイースを必要としない〇
なお、ステムホルダ１０の上昇ストロークは、第５図の
説明図により算出される。すなわち第１図に示すように
、ガラス管１の開口端２とフレア部５の離間距離はＬで
あるから、上昇ストロークはこの距離りと、ガラス管１
内に進入さであるため、ステムホルダ１０の全上昇スト
ローク１ま
この場合ガス炎の長さｔ’ （＝ｈ’ ／’ｄ ’ ）
の最高温度点をガラス管１の開口端２に対向させること
によって条件の良いバーナー２の使用状態となる。According to such a sealing method, if the flare diameter of the stem 4 is formed to be larger than the inner diameter d of the glass tube 1, the flare portion 5 can be softened and the glass tube can be sealed! Since it is pushed inward, even if there are variations in the inner diameter of the glass tube 1 and the outer diameter of the flared part 5, as long as the relationship D>d is satisfied,
Reliable sealing can be performed, and the sealed portion has a substantially constant shape without cracking. Moreover, since the glass tube I and the flare part 5 are welded together by the burner 12 that softens the flare part 5 in advance, not only is there a single burner 12, but the burner 12 can be raised integrally with the stem 4. This simplifies the process. Also, since the burner 12 is placed below the stem and heated by the upward flame hole I3, a large sweep is not required. The upward stroke of the stem holder 10 is calculated according to the explanatory diagram in FIG. That is, as shown in FIG. 1, since the distance between the open end 2 of the glass tube 1 and the flare portion 5 is L, the upward stroke is this distance and the distance between the open end 2 of the glass tube 1 and the flare portion 5 is L.
Since the gas flame enters inside, the length of the gas flame is t'(=h'/'d') when the entire upward stroke of the stem holder 10 is 1.
By arranging the highest temperature point of the burner 2 to face the open end 2 of the glass tube 1, the burner 2 can be used under favorable conditions.
上記実施例においてはけい光ランプ用の直管形ガラス管
Ｉを使用した例を示したが、本発明はこれに限らず、白
熱電球用の球形ガラス管であっても同様に実施でき、ま
た第６図に示すようなＵ字形ガラス管６０であっても実
施可能である。特に第６図のＵ字形ガラス管６０は両端
開口部６１．６１をステム６２１６２により同時に封止
することができる点で有効となる。なお、第６図中６３
は遮熱板である。また、本発明の上記実施例ではヘッド
がステムホルダと排気管のデムチャックとを備えたもの
であるが、本発明はこれに限らずステムホルダのみの封
止専用の場合であってもよい。In the above embodiment, an example was shown in which a straight glass tube I for a fluorescent lamp was used, but the present invention is not limited to this, and the present invention can be similarly implemented using a spherical glass tube for an incandescent lamp. A U-shaped glass tube 60 as shown in FIG. 6 may also be used. In particular, the U-shaped glass tube 60 shown in FIG. 6 is effective in that both end openings 61, 61 can be simultaneously sealed by the stem 62162. In addition, 63 in Figure 6
is a heat shield. Further, in the above embodiment of the present invention, the head includes a stem holder and a dem chuck for the exhaust pipe, but the present invention is not limited to this, and may be used exclusively for sealing only the stem holder.
以上詳述した通り本発明の方法によれば、ガラス管の内
径よりも大きな外径のフレア部を有するステムを、該フ
レア部を加熱軟化させて上記ガラス管内に押し込むよう
にするので、ガラス管の内径やステムの寸法にばらつき
があってもフレア部がガラス管内面に密接するから確実
な封ＩＬが行え、クラックを発生させることなく一定の
封止形状が得られる。しかし上記フレア部を加熱するに
はフレア部の下方に位置されたバーナにより上向きの炎
で加熱できるためノ々−すが小径ですみ、加えてこの／
？−すによりガラス管とフレア部との溶着を引続いて行
うことができるから、工程が簡単となって作業能率も向
上するなどの効果がある。As detailed above, according to the method of the present invention, a stem having a flared portion having an outer diameter larger than the inner diameter of the glass tube is pushed into the glass tube by heating and softening the flared portion. Even if there are variations in the inner diameter and dimensions of the stem, reliable sealing can be achieved because the flare portion comes into close contact with the inner surface of the glass tube, and a constant sealing shape can be obtained without cracking. However, in order to heat the above-mentioned flare part, the burner located below the flare part can heat the upward flame, so the diameter of the nose can be small.
? - Since the glass tube and the flared portion can be successively welded together, the process is simplified and work efficiency is improved.
第１図ないし第５図は本発明の一実施例を示し、第１図
は封止作業開始時における装置の断面図、第２図ないし
第４図は作業工程１暇に示す説明図、第５図はス１−０
−りを設定するための説明図、第６図は本発明の他の実
施例を示しＵ９−
字形ガラス管の封止作業を説明する図である。
Ｉ、６０・・・ガラス管、２．６１・・・開口端、３・
・・チャック、４．６２・・・ステム、５・・・フレア
部、１０・・・ステムホルダ、１２・・・バーナ、１３
・・・炎孔。
出願人代理人 弁理士 鈴 江 武 彦１０−
第１図
１
３
・ １０
３
１
ノ
特開昭５９−２０１３４１（４）
第２図 第３図
日日［耳４
第５図
第６図1 to 5 show an embodiment of the present invention, in which FIG. 1 is a sectional view of the device at the start of the sealing operation, FIGS. 2 to 4 are explanatory views shown during the first period of the work process, Figure 5 shows S1-0.
FIG. 6 shows another embodiment of the present invention and is a diagram for explaining the sealing operation of a U9-shaped glass tube. I, 60...Glass tube, 2.61...Open end, 3.
... Chuck, 4.62 ... Stem, 5 ... Flare part, 10 ... Stem holder, 12 ... Burner, 13
...Flame hole. Applicant's agent Patent attorney Takehiko Suzue 10- Fig. 1 1 3 ・ 10 3 1 No. JP-A-59-201341 (4) Fig. 2 Fig. 3 Date [Ear 4 Fig. 5 Fig. 6
Claims (1)
の開口端内径よりも大きなフレア径を有するステムを上
記ガラス管の開口端に離間して対向させ、所定の開き角
をなす炎孔を有して上記ステムの下方に位置されたバー
ナにより上記ステムのフレア部外周を加熱軟化し、この
ステムおよびバーナを上記ガラス管に対して相対的に上
昇させることによりステムをガラス管の開口端に押し込
んでフレア部外周をガラス管開口端と接触させ、これら
ガラス管開口端とフレア部を同時に上記バーナによって
加熱して両者を溶着させることを特徴とする管球の封止
方法。A glass tube is supported with the open end facing downward, and a stem having a flare diameter larger than the inner diameter of the open end of the glass tube is spaced apart and opposed to the open end of the glass tube to form a flame hole with a predetermined opening angle. The outer periphery of the flared portion of the stem is heated and softened by a burner located below the stem, and the stem and burner are raised relative to the glass tube to bring the stem to the open end of the glass tube. A method for sealing a tube, the method comprising pushing the outer periphery of the flared portion into contact with the open end of the glass tube, and simultaneously heating the open end of the glass tube and the flared portion with the burner to weld them together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7503183A JPS59201341A (en) | 1983-04-28 | 1983-04-28 | Sealing of bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7503183A JPS59201341A (en) | 1983-04-28 | 1983-04-28 | Sealing of bulb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59201341A true JPS59201341A (en) | 1984-11-14 |
Family
ID=13564405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7503183A Pending JPS59201341A (en) | 1983-04-28 | 1983-04-28 | Sealing of bulb |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59201341A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01235127A (en) * | 1988-03-14 | 1989-09-20 | Mitsubishi Electric Corp | Sealing of tubular bulb |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56102042A (en) * | 1980-01-21 | 1981-08-15 | Ckd Corp | Encapsulating method for bulb |
-
1983
- 1983-04-28 JP JP7503183A patent/JPS59201341A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56102042A (en) * | 1980-01-21 | 1981-08-15 | Ckd Corp | Encapsulating method for bulb |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01235127A (en) * | 1988-03-14 | 1989-09-20 | Mitsubishi Electric Corp | Sealing of tubular bulb |
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