JP2002345655A - Vacuum double container and sealing method therefor - Google Patents
Vacuum double container and sealing method thereforInfo
- Publication number
- JP2002345655A JP2002345655A JP2001160979A JP2001160979A JP2002345655A JP 2002345655 A JP2002345655 A JP 2002345655A JP 2001160979 A JP2001160979 A JP 2001160979A JP 2001160979 A JP2001160979 A JP 2001160979A JP 2002345655 A JP2002345655 A JP 2002345655A
- Authority
- JP
- Japan
- Prior art keywords
- double container
- vacuum double
- tapered portion
- brazing material
- concave
- 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.)
- Granted
Links
Landscapes
- Thermally Insulated Containers For Foods (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、金属製の内ビンと
外ビンとの間に密閉空間を有する真空二重容器とその封
口方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum double container having a sealed space between a metal inner bottle and an outer bottle, and a method of sealing the double container.
【0002】[0002]
【従来の技術】一般に魔法瓶やジャーと呼ばれる保温容
器は、ステンレススチールのような板金のプレス成形に
よって製作された内ビンと外ビンからなる。例えば図8
に示すように、内ビン51と外ビン52の開口縁部53
は互いに溶接され、内ビン51と外ビン52との間に密
閉空間54が形成される。通常は外ビン52の底面55
に形成された排気孔56から密閉空間54内の空気を抜
くことにより、内ビン51と外ビン52との間に真空層
を形成し、真空二重容器(保温容器)50が形成され
る。最近は電気ポットでも、この種の真空二重容器をタ
ンクとして採用し電気ヒータの通電なしで保温を行うこ
とができるものが商品化されている。2. Description of the Related Art Insulation containers, generally called thermos bottles or jars, comprise an inner bottle and an outer bottle manufactured by press-forming a sheet metal such as stainless steel. For example, FIG.
As shown in the figure, the opening edges 53 of the inner bin 51 and the outer bin 52
Are welded together to form a closed space 54 between the inner bin 51 and the outer bin 52. Normally, the bottom 55 of the outer bottle 52
By evacuating the air in the closed space 54 from the exhaust hole 56 formed in the inner container 51, a vacuum layer is formed between the inner bottle 51 and the outer bottle 52, and a vacuum double container (thermal insulation container) 50 is formed. In recent years, electric pots have been commercialized that employ this type of vacuum double container as a tank and can maintain the temperature without energizing an electric heater.
【0003】真空二重容器50の排気及び封口工程にお
いて、排気前の真空二重容器50は外ビン52の底面5
5が上になるように伏せた状態で所定の台に載置され
る。そして、複数の真空二重容器50が載置された台が
準備室(低真空室)、真空室、ろう付け室、冷却室を順
番に通過する間に、各真空二重容器50の排気及び封口
が行われる。In the process of evacuating and closing the vacuum double container 50, the vacuum double container 50 before evacuation is attached to the bottom surface 5 of the outer bottle 52.
5 is placed on a predetermined table in a state where it is face down so that it faces upward. Then, while the table on which the plurality of vacuum dual containers 50 are placed sequentially passes through the preparation chamber (low vacuum chamber), the vacuum chamber, the brazing chamber, and the cooling chamber, the evacuation of each vacuum dual container 50 and Sealing is performed.
【0004】従来、排気孔56から密閉空間54内の空
気を抜いた後に排気孔56を封口するためのろう材とし
て、鉛入りガラスを用いていた。鉛入りガラスは無鉛ガ
ラスに比べて低温で溶融するのでろう材として適してい
る。鉛入りガラスのろう材は、押し出し成形と切断によ
って製造されることから略円筒形状を有している。この
ようなろう材を排気前の真空二重容器50の底面55に
形成された排気孔56を含む凹部57に予め置いてお
く。そして、真空室で真空二重容器50の排気が行われ
た後に、ろう付け室でろう材が溶融して排気孔56を封
口する。Heretofore, lead-containing glass has been used as a brazing material for closing the exhaust hole 56 after the air in the closed space 54 is evacuated from the exhaust hole 56. Lead-containing glass is suitable as a brazing material because it melts at a lower temperature than lead-free glass. The lead-containing glass brazing material has a substantially cylindrical shape because it is manufactured by extrusion and cutting. Such a brazing material is previously placed in a concave portion 57 including an exhaust hole 56 formed in a bottom surface 55 of the vacuum double container 50 before evacuation. Then, after the evacuation of the vacuum double container 50 is performed in the vacuum chamber, the brazing material is melted in the brazing chamber and the evacuation hole 56 is closed.
【0005】なお、ろう材を各真空二重容器50の凹部
57に置く作業はピンセット等を用いた手作業により行
っていた。また、凹部57に置かれたろう材が例えば載
置台の移動時や排気時の振動によって真空二重容器50
が揺れたときに凹部57から飛び出してしまうことがな
いように、凹部57を覆う薄板片が底面55に溶接され
る場合もあった。この場合は薄板片の底面55に溶接さ
れていない側を持ち上げて凹部57にろう材をセットす
るように作業していた。[0005] The work of placing the brazing material in the recess 57 of each vacuum double container 50 has been performed manually by using tweezers or the like. In addition, the brazing material placed in the concave portion 57 may be vibrated during the movement of the mounting table or during the evacuation, for example.
In some cases, a thin plate covering the concave portion 57 is welded to the bottom surface 55 so that the thin plate does not jump out of the concave portion 57 when it swings. In this case, the work which has not been welded to the bottom surface 55 of the thin plate piece is lifted to set the brazing material in the recess 57.
【0006】[0006]
【発明が解決しようとする課題】上記のような従来の真
空二重容器の排気及び封口工程において予め凹部57に
ろう材を置く作業は手作業であるために工数がかかり、
コスト低減の障壁となっていた。特に、凹部57を覆う
薄板片が設けられている場合に、その薄板片の一端側を
持ち上げるようにして凹部57にろう材をセットする作
業は手間がかかるので、作業性の改善が求められてい
た。The work of placing the brazing material in the concave portion 57 in advance in the above-described vacuum evacuation and sealing steps of the vacuum double container is a manual operation, and requires a lot of man-hours.
This was a barrier to cost reduction. In particular, when a thin plate piece that covers the concave portion 57 is provided, the work of setting the brazing material in the concave portion 57 by lifting one end of the thin plate piece is time-consuming, and thus improvement in workability is required. Was.
【0007】また、従来使用されていた鉛入りガラスの
ろう材は、鉛が人体に害を及ぼす可能性があることや真
空二重容器のリサイクルが容易でなくなること等の短所
を有する。このため、無鉛ガラスのろう材を使用するこ
とが検討された。前述のように従来の鉛入りガラスのろ
う材が略円筒形状を有するのに対し、無鉛ガラスのろう
材は自由落下によって略球状を有するように製造するこ
とが行いやすい。この略球形状のろう材は従来の略円筒
形状のろう材に比べて任意の方向に転がりやすい性質を
有する。[0007] Further, the lead-containing glass brazing material conventionally used has disadvantages in that lead may harm the human body and recycling of the vacuum double container becomes difficult. For this reason, the use of a lead-free glass brazing material has been studied. As described above, the conventional lead-containing glass brazing material has a substantially cylindrical shape, whereas the lead-free glass brazing material can be easily manufactured to have a substantially spherical shape by free fall. This substantially spherical brazing material has a property of rolling more easily in an arbitrary direction than the conventional substantially cylindrical brazing material.
【0008】そこで、本発明は、真空二重容器の外ビン
の底面の形状を工夫し略球形状のろう材を用いることに
より、真空二重容器の排気及び封口工程におけるろう材
のセット作業の機械化を可能にすることを目的とする。[0008] In view of the above, according to the present invention, by devising the shape of the bottom surface of the outer bottle of the vacuum double container and using a substantially spherical brazing material, it is possible to set the brazing material in the evacuation and sealing steps of the vacuum double container. The purpose is to enable mechanization.
【0009】[0009]
【課題を解決するための手段】本発明による真空二重容
器は、金属製の内ビンと外ビンとの間に密閉空間を有す
る真空二重容器において、外ビンの底面に凹状のテーパ
ー部が形成され、テーパー部の最下部又は最下部近傍に
密閉空間と連通する1又は複数の排気孔が設けられ、略
球形状のろう材を用いて排気孔が封口されていることを
特徴とする。SUMMARY OF THE INVENTION A vacuum double container according to the present invention is a vacuum double container having a sealed space between a metal inner bottle and an outer bottle, wherein a concave tapered portion is formed on the bottom surface of the outer bottle. One or more exhaust holes which are formed and communicate with the sealed space are provided at the lowermost portion or near the lowermost portion of the tapered portion, and the exhaust holes are sealed using a substantially spherical brazing material.
【0010】このような構成によれば、真空二重容器の
排気及び封口工程において、外ビンの底面が上になるよ
うに伏せた状態の真空二重容器のテーパー部の上方から
略球形状のろう材を落下すれば、ろう材がテーパー部を
転がってテーパー部の最下部又は最下部近傍に形成され
た排気孔の近傍にセットされる。排気時の振動等によっ
てろう材がテーパー部の最下部又は最下部近傍から外周
方向に移動することがあっても、振動が止めばろう材は
再びテーパー部の傾斜面に沿って転がり最下部又は最下
部近傍に戻る。したがって、従来のように手作業によら
ずに、ろう材のセットを自動化(機械化)することが可
能になる。According to such a configuration, in the evacuation and sealing step of the vacuum double container, a substantially spherical shape is formed from above the tapered portion of the vacuum double container in a state where the bottom of the outer bottle is turned up. When the brazing material falls, the brazing material rolls on the tapered portion and is set near the lowermost portion of the tapered portion or near the exhaust hole formed near the lowermost portion. Even if the brazing material moves in the outer circumferential direction from the lowermost portion or the vicinity of the lowermost portion of the tapered portion due to vibration at the time of exhaustion, the brazing material rolls again along the inclined surface of the tapered portion if the vibration stops, and the lowermost or Return to near the bottom. Therefore, it is possible to automate (mechanize) the setting of the brazing filler metal without manual operation as in the related art.
【0011】好ましくは、テーパー部の最下部又は最下
部近傍に段状に窪んだ平面視異形の凹部が形成され、ろ
う材が凹部の底面から浮いた状態で凹部に保持されるよ
うに構成され、凹部の底面又は側面に排気孔が設けられ
ている。このような構成によれば、上記のようにしてテ
ーパー部の最下部又は最下部近傍に転落したろう材が凹
部に保持されるので、排気時の振動等によってろう材が
テーパー部の最下部又は最下部近傍から外周方向に移動
する現象が発生しにくくなる。また、凹部は平面視異形
であるので略球形状のろう材が凹部の開口を完全に塞ぐ
ことなく、しかも、ろう材が凹部の底面から浮いた状態
で保持されるので、排気孔を介した密閉空間と外部との
連通が確保され密閉空間の排気が円滑に行われる。Preferably, a concave portion having a stepped concave shape in plan view is formed at or near the lowermost portion of the tapered portion, and the brazing material is held in the concave portion while floating from the bottom surface of the concave portion. An exhaust hole is provided on the bottom or side surface of the recess. According to such a configuration, since the brazing material that has fallen to the lowermost portion or the vicinity of the lowermost portion of the tapered portion as described above is held in the concave portion, the brazing material is moved to the lowermost portion of the tapered portion or the like by vibration at the time of exhaustion. The phenomenon of moving from the vicinity of the lowermost portion toward the outer periphery hardly occurs. In addition, since the concave portion is irregular in plan view, the substantially spherical brazing material does not completely cover the opening of the concave portion, and the brazing material is held in a state of floating from the bottom surface of the concave portion. Communication between the closed space and the outside is ensured, and the closed space is smoothly exhausted.
【0012】なお、テーパー部の最下部はテーパー部の
中央部に位置することが好ましいが、テーパー部の最下
部をテーパー部の中央部からずらした位置に設けること
も可能である。The lowermost portion of the tapered portion is preferably located at the center of the tapered portion. However, the lowermost portion of the tapered portion may be provided at a position shifted from the center of the tapered portion.
【0013】また、外ビンの底面の中心から外周までの
長さの略1/3以上が凹状のテーパー部として形成さ
れ、テーパー部の外周に環状の壁部が形成されているこ
とが好ましい。このような構造によれば、排気時の振動
等によってろう材がテーパー部の最下部又は最下部近傍
から外周方向に移動することがあっても、テーパー部の
外周に形成された環状の壁部に当たって再びテーパー部
の傾斜面に沿って転がり最下部又は最下部近傍に戻る。It is preferable that at least about one third of the length from the center to the outer periphery of the bottom surface of the outer bin is formed as a concave tapered portion, and an annular wall is formed on the outer periphery of the tapered portion. According to such a structure, even if the brazing material may move in the outer circumferential direction from the lowermost portion or the vicinity of the lowermost portion of the tapered portion due to vibrations at the time of exhausting, the annular wall portion formed on the outer circumference of the tapered portion. , And rolls again along the inclined surface of the tapered portion and returns to the lowermost portion or the vicinity of the lowermost portion.
【0014】更に、環状の壁部の外側において、底面に
1又は複数の予備凹部が形成されていることが好まし
い。このような構成によれば、仮にろう材が環状の壁部
を乗り越えてテーパー部の外へ出るようなことがあって
も、そのろう材は予備凹部に保持される。こうして、ろ
う材が真空二重容器からこぼれることを防ぐことができ
る。Further, it is preferable that one or a plurality of preliminary concave portions are formed on the bottom surface outside the annular wall portion. According to such a configuration, even if the brazing material gets over the annular wall portion and goes out of the tapered portion, the brazing material is held in the preliminary concave portion. Thus, it is possible to prevent the brazing material from spilling from the vacuum double container.
【0015】排気時の振動等によってテーパー部の中央
部(最下部又は最下部近傍)から外周部へ移動したろう
材がテーパー部の傾斜面に沿って中央部に戻る際に、振
動方向によっては渦巻を描くようにして戻る場合があ
る。この場合は、ろう材がテーパー部の中央部に戻るま
でに時間がかかり、好ましくない。そこで、テーパー部
に、中央部から外周部に向かって放射状に延びる1又は
複数の溝又は凸条部が形成されていることが好ましい。
こうすることにより、テーパー部の外周部から中央部へ
戻るろう材は、渦巻を描くことなく、溝又は凸条部に沿
って速やかに中央部に戻る。Depending on the vibration direction, when the brazing material that has moved from the central portion (the lowermost portion or the vicinity of the lowermost portion) of the tapered portion to the outer peripheral portion due to vibrations at the time of exhaustion returns to the central portion along the inclined surface of the tapered portion. It may return in a spiral. In this case, it takes time until the brazing material returns to the center of the tapered portion, which is not preferable. Therefore, it is preferable that one or a plurality of grooves or ridges extending radially from the central portion to the outer peripheral portion are formed in the tapered portion.
By doing so, the brazing material returning from the outer peripheral portion to the central portion of the tapered portion returns to the central portion promptly along the groove or the ridge without drawing a spiral.
【0016】本発明による真空二重容器の封口方法は、
金属製の内ビンと外ビンとの間に密閉空間を有する真空
二重容器において、外ビンの底面に凹状のテーパー部を
形成すると共にテーパー部の最下部又は最下部近傍に密
閉空間と連通する1又は複数の排気孔を設け、外ビンの
底面が上になるように真空二重容器を伏せた状態で所定
の台に載置し、テーパー部の上方から球状のろう材を落
下し、該ろう材をテーパー部の最下部又は最下部近傍へ
自然転落させ、真空室で密閉空間の排気を行った後、テ
ーパー部の最下部又は最下部近傍に位置するろう材を溶
かすことにより排気孔を封口することを特徴とする。こ
のような封口方法によれば、従来のように手作業によら
ずに、ろう材のセットを自動化(機械化)することが可
能になる。The method for sealing a vacuum double container according to the present invention comprises:
In a vacuum double container having a sealed space between a metal inner bottle and an outer bottle, a concave tapered portion is formed on the bottom surface of the outer bottle and communicates with the sealed space at the lowermost portion or near the lowermost portion of the tapered portion. One or a plurality of exhaust holes are provided, and placed on a predetermined table in a state where the vacuum double container is face down so that the bottom surface of the outer bottle is at the top, and a spherical brazing material is dropped from above the tapered portion. After the brazing material is naturally dropped to the lowermost portion or the vicinity of the lowermost portion of the tapered portion and the enclosed space is evacuated in the vacuum chamber, the exhaust hole is formed by melting the brazing material located at the lowermost portion or the vicinity of the lowermost portion of the tapered portion. It is characterized by being sealed. According to such a sealing method, it becomes possible to automate (mechanize) the setting of the brazing filler metal without manual operation as in the related art.
【0017】好ましくは、テーパー部のテーパー角は、
密閉空間の排気の際の振動により真空二重容器が傾くと
きの最大傾斜角より大である。これにより、テーパー部
の最下部又は最下部近傍にセットされたろう部材が振動
によってテーパー部の外周部へ移動する可能性が小さく
なる。Preferably, the taper angle of the tapered portion is
It is larger than the maximum inclination angle when the vacuum double container inclines due to the vibration at the time of evacuation of the closed space. Thus, the possibility that the brazing member set at the lowermost portion or the vicinity of the lowermost portion of the tapered portion moves to the outer peripheral portion of the tapered portion due to vibration is reduced.
【0018】[0018]
【発明の実施の形態】以下、図面を参照しながら本発明
の実施形態を説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0019】図1は、本発明の第1の実施形態に係る真
空二重容器の一例を示しており、(a)は底面図、
(b)は底面を上にした側面視の断面図である。この真
空二重容器10はステンレススチールのような金属板の
プレス成形によって製作された内ビン11と外ビン12
からなる。内ビン11と外ビン12の開口縁部13は互
いに溶接され、内ビン11と外ビン12との間に密閉空
間14が形成される。FIG. 1 shows an example of a vacuum double container according to a first embodiment of the present invention, wherein (a) is a bottom view,
(B) is a sectional view in a side view with the bottom face up. This vacuum double container 10 has an inner bottle 11 and an outer bottle 12 manufactured by press-forming a metal plate such as stainless steel.
Consists of The opening edges 13 of the inner bin 11 and the outer bin 12 are welded to each other to form a closed space 14 between the inner bin 11 and the outer bin 12.
【0020】外ビン12の底面15には、中央部が窪ん
だ凹状のテーパー部16が形成されている。図示の例で
はテーパー部16の半径が底面15の半径の略1/2で
あるが、少なくとも1/3程度あればよい。テーパー部
16の外周には環状の壁部17が形成され、その外側に
は環状の予備凹部18が形成されている。但し、図示の
ように1つの環状の予備凹部18を設ける代わりに、複
数の予備凹部を環状に配置してもよい。この予備凹部1
8は、テーパー部16から環状の壁部17を乗り越えて
こぼれ出たろう材を保持する働きを有する。また、テー
パー部16の中央部には段状に窪んだ凹部19が形成さ
れ、その底面には密閉空間14と外部を連通する小孔
(排気孔)20が形成されている。The bottom surface 15 of the outer bin 12 is formed with a concave tapered portion 16 whose central portion is depressed. In the illustrated example, the radius of the tapered portion 16 is approximately の of the radius of the bottom surface 15, but may be at least about 3. An annular wall portion 17 is formed on the outer periphery of the tapered portion 16, and an annular preliminary concave portion 18 is formed outside the wall portion 17. However, instead of providing one annular preliminary concave portion 18 as shown, a plurality of preliminary concave portions may be arranged in an annular shape. This spare recess 1
Reference numeral 8 has a function of holding the brazing material spilled over the annular wall portion 17 from the tapered portion 16. Further, a stepped concave portion 19 is formed at the center of the tapered portion 16, and a small hole (exhaust hole) 20 that communicates the sealed space 14 with the outside is formed at the bottom surface.
【0021】図2は、テーパー部16の中央部に設けら
れた凹部19及び排気孔20を示す拡大図である。
(a)は底面図であり、(b)は(a)におけるb−b
断面を示している。凹部19は、図2(a)に示すよう
に平面視楕円形(異形)であり図2(b)に示すように
テーパー部16から段状に窪んでいる。また、凹部19
の底面に形成された排気孔20は、図2(a)に示すよ
うに矩形である。FIG. 2 is an enlarged view showing a concave portion 19 and an exhaust hole 20 provided at the center of the tapered portion 16.
(A) is a bottom view, (b) is bb in (a).
It shows a cross section. The concave portion 19 has an elliptical shape (irregular shape) in plan view as shown in FIG. 2A, and is recessed stepwise from the tapered portion 16 as shown in FIG. 2B. Also, the recess 19
The exhaust hole 20 formed on the bottom surface of is rectangular as shown in FIG.
【0022】図2(b)において二点鎖線で示す円21
は排気孔20の封口に使用される略球形のろう材であ
り、真空二重容器10の封口工程においてろう付け室で
溶融する前の状態を示している。ろう材21は無鉛ガラ
スで製造される。A circle 21 shown by a two-dot chain line in FIG.
Is a substantially spherical brazing material used for closing the exhaust hole 20 and shows a state before melting in the brazing chamber in the closing step of the vacuum double container 10. The brazing material 21 is made of lead-free glass.
【0023】真空二重容器10の封口工程において、排
気前の真空二重容器10は外ビン12の底面15が上に
なるように伏せた状態で所定の台に載置される。そし
て、複数の真空二重容器10が所定の位置に載置された
台が準備室(低真空室)、真空室、ろう付け室、冷却室
を順番に通過する間に、ろう材21の供給、真空二重容
器10の排気及び封口(ろう材21の溶融)が自動的に
行われる。なお、密閉空間14の排気及び封口後にゲッ
ター22を用いて内ビン11及び外ビン12の金属中に
含まれているガスを燃焼させることにより、密閉空間1
4の真空度が高められる。In the step of closing the vacuum double container 10, the vacuum double container 10 before evacuation is placed on a predetermined table in a state where the bottom surface 15 of the outer bottle 12 faces upward. The supply of the brazing material 21 is performed while the table on which the plurality of vacuum double containers 10 are mounted at predetermined positions sequentially passes through the preparation chamber (low vacuum chamber), the vacuum chamber, the brazing chamber, and the cooling chamber. Then, the evacuation and sealing (melting of the brazing material 21) of the vacuum double container 10 are automatically performed. The gas contained in the metal of the inner bin 11 and the outer bin 12 is burned using the getter 22 after the closed space 14 is evacuated and sealed.
4, the degree of vacuum is increased.
【0024】ろう材21の供給は専用の機械によって真
空二重容器10ごとに1個ずつ自動的に行われる。つま
り、各真空二重容器10のテーパー部16の上方から球
状のろう材21を落下すると、ろう材21はテーパー部
16のテーパー面上を自然転落し、その中央部に設けら
れた凹部19に保持される。The supply of the brazing material 21 is automatically performed one by one for each vacuum double container 10 by a dedicated machine. That is, when the spherical brazing material 21 falls from above the tapered portion 16 of each vacuum double container 10, the brazing material 21 naturally falls on the tapered surface of the tapered portion 16, and the brazing material 21 falls into the concave portion 19 provided at the center thereof. Will be retained.
【0025】図2(b)に示すように、凹部19の短径
dはろう材21の直径Dより小さく、溶融前のろう材2
1は凹部19の底面19aから浮いた状態で保持されて
いる。また、凹部19は平面視異形(楕円形)であるの
で略球形状のろう材21が凹部の開口を完全に塞ぐこと
がない。したがって、排気孔20を介した密閉空間14
と外部との連通が確保され密閉空間14の排気が円滑に
行われる。As shown in FIG. 2B, the minor diameter d of the recess 19 is smaller than the diameter D of the brazing material 21 and the brazing material 2 before melting is formed.
1 is held in a state of floating from the bottom surface 19 a of the concave portion 19. Further, since the concave portion 19 has an irregular shape (elliptical shape) in plan view, the substantially spherical brazing material 21 does not completely block the opening of the concave portion. Therefore, the closed space 14 through the exhaust hole 20
Communication with the outside is ensured, and the exhaust of the sealed space 14 is performed smoothly.
【0026】上記の説明から明らかなように、凹部19
の平面視形状は円形でない異形であればよく、必ずしも
楕円形に限る必要は無い。例えば長方形や長円形でもよ
い。また、排気孔20の平面視形状を矩形としているの
は、仮に凹部19の短径dより小さい直径のろう材21
が供給された場合にも排気孔20が完全に塞がれてしま
うことが無いようにするためである。したがって、排気
孔20の平面視形状についても円形以外であればよく、
矩形に限らず三角形や星形等任意の形状を採用すること
ができる。複数の丸孔を接近して設けてもよい。また、
排気孔20を凹部19の底面19aではなく側面19b
に設けてもよい。As is clear from the above description, the concave portion 19
Is not limited to an elliptical shape as long as it is a non-circular variant shape. For example, it may be rectangular or oval. Further, the rectangular shape of the exhaust hole 20 in plan view is due to the brazing material 21 having a diameter smaller than the minor diameter d of the concave portion 19.
This is to prevent the exhaust hole 20 from being completely closed even when the air is supplied. Therefore, the shape of the exhaust hole 20 in plan view may be other than circular, and
Any shape such as a triangle or a star, not limited to a rectangle, can be adopted. A plurality of round holes may be provided close to each other. Also,
The exhaust hole 20 is not the bottom surface 19a of the recess 19 but the side surface 19b.
May be provided.
【0027】図3は、上記実施形態において図2(b)
に示した断面図の変形例を示している。(a)は第1変
形例、(b)は第2変形例、(c)は第3変形例をそれ
ぞれ示している。ろう材21が凹部19の底面19aか
ら浮いた状態で凹部19に保持される構造として、図3
(a)に示すように、ろう材21が凹部19の中に入り
込みながら、その傾斜側面19bの途中で保持されるよ
うにしてもよい。こうすれば、凹部19に一旦保持され
たろう材21が排気時の振動等によって凹部19から外
れる可能性が小さくなり好ましい。但し、ろう材21の
加工精度(直径のばらつき)及び凹部19の短径の加工
精度(ばらつき)に関して厳しい精度が要求される。FIG. 3 shows the embodiment shown in FIG.
9 shows a modification of the cross-sectional view shown in FIG. (A) shows a first modification, (b) shows a second modification, and (c) shows a third modification. FIG. 3 shows a structure in which the brazing material 21 is held in the concave portion 19 while floating from the bottom surface 19 a of the concave portion 19.
As shown in (a), the brazing material 21 may be held in the middle of the inclined side surface 19b while entering the concave portion 19. In this case, the possibility that the brazing material 21 once held in the concave portion 19 comes off the concave portion 19 due to vibration at the time of exhaustion or the like is reduced, which is preferable. However, strict accuracy is required with respect to the processing accuracy (variation in diameter) of the brazing material 21 and the processing accuracy (variation) of the short diameter of the concave portion 19.
【0028】また、図3(b)に示すように、凹部19
の側面に段部19cを設けて、凹部19の中に入り込ん
だろう材21が段部19cに載るようにして底面19a
から浮いた状態で保持される構造としてもよい。あるい
は、図3(c)に示すように、凹部19の底面19aに
突起部19dを設け、凹部19の中に入り込んだろう材
21が突起部19dの先端に当接して底面19aから浮
いた状態で保持される構造としてもよい。排気孔20は
図3(c)に示すように凹部19の側面19bに設けて
もよいし、底面19aに設けてもよい。Further, as shown in FIG.
Is provided with a step 19c on the side surface of the bottom surface 19a so that the brazing material 21 that has entered the recess 19 is placed on the step 19c.
It is good also as a structure held in the state floated from. Alternatively, as shown in FIG. 3C, a projection 19d is provided on the bottom surface 19a of the recess 19, and the brazing material 21 that has entered the recess 19 comes into contact with the tip of the projection 19d and floats from the bottom surface 19a. It may be a structure held by. The exhaust hole 20 may be provided on the side surface 19b of the concave portion 19 as shown in FIG. 3C, or may be provided on the bottom surface 19a.
【0029】図4は、第2の実施形態に係る真空二重容
器の一例を示しており、(a)は底面図、(b)は底面
を上にした外ビン12の底部の側面視断面図である。こ
の実施形態では、第1の実施形態における凹部19を省
略し、テーパー部16の中央部(最底部)16aに排気
孔20を直接設けている。この場合、テーパー部16の
上方から落下供給された略球形のろう材21はテーパー
部16の中央部16aへ転落するが保持はされない。し
たがって、排気時の振動等によって容易にテーパー部1
6の中央部16aから外周方向へ移動するが、振動が止
めばテーパー部16のテーパー面に沿って中央部16a
に戻る。そして、ろう付け時にはろう材21はテーパー
部16の中央部16aに設けられた排気孔20の近傍に
位置し、ろう材21の溶融によって排気孔20が封口さ
れる。FIGS. 4A and 4B show an example of a vacuum double container according to the second embodiment, wherein FIG. 4A is a bottom view, and FIG. 4B is a side sectional view of the bottom of the outer bottle 12 with the bottom facing upward. FIG. In this embodiment, the concave portion 19 in the first embodiment is omitted, and the exhaust hole 20 is provided directly in the center (bottom) 16 a of the tapered portion 16. In this case, the substantially spherical brazing material 21 dropped and supplied from above the tapered portion 16 falls to the central portion 16a of the tapered portion 16 but is not held. Therefore, the tapered portion 1 can be easily formed due to vibration at the time of exhaust.
6 moves in the outer peripheral direction from the central portion 16a, but if the vibration stops, the central portion 16a moves along the tapered surface of the tapered portion 16.
Return to At the time of brazing, the brazing material 21 is located near the exhaust hole 20 provided in the central portion 16 a of the tapered portion 16, and the exhaust hole 20 is sealed by melting the brazing material 21.
【0030】図4に示す例では、2個の排気孔20がテ
ーパー部16の中央部16aに設けられており、溶融前
のろう材21が排気孔20を完全に塞ぐことなく排気が
円滑に行われるようにしている。テーパー部16の中心
に1個の小孔を設け、その近傍に1又は複数の小孔(排
気孔)を設けるようにしてもよい。あるいは、第1の実
施形態で述べたように、丸孔以外の平面視異形の排気孔
を1個だけ設けるようにしてもよい。In the example shown in FIG. 4, two exhaust holes 20 are provided in the central portion 16a of the tapered portion 16, so that the brazing material 21 before melting does not completely block the exhaust holes 20 so that the exhaust can be smoothly performed. To be done. One small hole may be provided at the center of the tapered portion 16, and one or a plurality of small holes (exhaust holes) may be provided near the small hole. Alternatively, as described in the first embodiment, only one exhaust hole having an irregular shape in plan view other than the round hole may be provided.
【0031】図5は、第3の実施形態に係る真空二重容
器のテーパー部16の中央部に設けられた凹部19及び
排気孔20を示す拡大図である。(a)は底面図であ
り、(b)は(a)におけるb−b断面を示している。
この実施形態では、凹部19は平面視円形であり、その
直径dはろう材21の直径Dの2倍以上である。そし
て、凹部19の底面19aは中央部が突出するように形
成され、その頂部に排気孔20が形成されている。この
場合、テーパー部16の上方から供給され凹部19の中
に転落したろう材21は、凹部19の底面19aの頂部
に設けられた排気孔20を塞がない位置に落ち着く。つ
まり、図5(a)及び(b)に示すように、略球形のろ
う材21は凹部19の側面19bに常に当接している。FIG. 5 is an enlarged view showing a concave portion 19 and an exhaust hole 20 provided at the center of the tapered portion 16 of the vacuum double container according to the third embodiment. (A) is a bottom view, and (b) shows a bb cross section in (a).
In this embodiment, the concave portion 19 has a circular shape in a plan view, and the diameter d is twice or more the diameter D of the brazing material 21. The bottom surface 19a of the concave portion 19 is formed so that the central portion protrudes, and the exhaust hole 20 is formed at the top. In this case, the brazing material 21 supplied from above the tapered portion 16 and falling into the concave portion 19 settles at a position where the exhaust hole 20 provided at the top of the bottom surface 19a of the concave portion 19 is not blocked. That is, as shown in FIGS. 5A and 5B, the substantially spherical brazing material 21 is always in contact with the side surface 19 b of the recess 19.
【0032】図6は、第1の実施形態に係るテーパー部
16の変形例を示す底面図である。(a)は第1変形例
を示し、(b)は第2変形例を示している。図6(a)
の第1変形例では、テーパー部16に、中央部から外周
部に向かって放射状に延びる4本の凸条部22が形成さ
れている。また、図6(b)の第2変形例では、テーパ
ー部16に、中央部から外周部に向かって放射状に延び
る1本の溝23が形成されている。いずれも、排気時の
振動等により凹部19から飛び出してテーパー部16の
外周部へ移動したろう材21が速やかに中央部の凹部1
9に戻るようにするためである。FIG. 6 is a bottom view showing a modification of the tapered portion 16 according to the first embodiment. (A) shows a first modification, and (b) shows a second modification. FIG. 6 (a)
In the first modified example, four projecting ridges 22 extending radially from the center to the outer periphery are formed in the tapered portion 16. Further, in the second modified example of FIG. 6B, one groove 23 extending radially from the central portion to the outer peripheral portion is formed in the tapered portion 16. In any case, the brazing material 21 that has jumped out of the concave portion 19 due to vibrations at the time of evacuation and moved to the outer peripheral portion of the tapered portion 16 is quickly moved to the central concave portion 1.
This is for returning to 9.
【0033】つまり、排気時の振動等によってテーパー
部16の中央部から外周部へ移動したろう材21がテー
パー部16の傾斜面上を中央部に戻る際に、振動方向に
よっては渦巻を描くようにして戻る場合がある。この場
合は、ろう材21がテーパー部の中央部に戻るまでに時
間がかかり、好ましくない。しかし、上記のようにテー
パー部16の中央部から外周部に向かって放射状に延び
る1又は複数の溝23又は凸条部22が形成されていれ
ば、ろう材21は渦巻を描くことなく、溝23又は凸条
部22に沿って速やかに中央部(凹部19)に戻る。な
お、このような溝23又は凸条部22を第2又は第3の
実施形態と組み合わせても同様の効果が得られる。That is, when the brazing material 21 that has moved from the central portion to the outer peripheral portion of the tapered portion 16 due to vibration or the like at the time of exhaust returns to the central portion on the inclined surface of the tapered portion 16, it may draw a spiral depending on the vibration direction. May return. In this case, it takes time until the brazing material 21 returns to the center of the tapered portion, which is not preferable. However, as described above, if one or a plurality of grooves 23 or ridges 22 extending radially from the center to the outer periphery of the tapered portion 16 are formed, the brazing material 21 does not draw a spiral, It immediately returns to the central portion (recess 19) along 23 or ridge 22. The same effect can be obtained by combining such a groove 23 or the ridge 22 with the second or third embodiment.
【0034】上記の各実施形態及び変形例において、テ
ーパー部16のテーパー角は、排気の際の振動により真
空二重容器10が傾くときの最大傾斜角より大であるこ
とが好ましい。こうすることにより、ろう材21が凹部
19から飛び出してもテーパー部16の外周部へ移動せ
ずにすぐに凹部19へ戻る可能性が高くなる。In each of the above embodiments and modifications, it is preferable that the taper angle of the tapered portion 16 is larger than the maximum inclination angle when the vacuum double container 10 is inclined due to vibration during evacuation. By doing so, even if the brazing material 21 jumps out of the concave portion 19, the possibility that the brazing material 21 immediately returns to the concave portion 19 without moving to the outer peripheral portion of the tapered portion 16 is increased.
【0035】以上、本発明の実施形態及び変形例を説明
したが、図示した形状は一例にすぎない。本発明は上記
の実施形態及び変形例に限らず、種々の形態で実施する
ことができる。例えば、上記の実施形態及び変形例では
テーパー部16の中央部が最下部(最底部)となってい
るが、図7に示すように最下部16a’を中央部からず
らしてもよい。この場合、排気孔20は中央部ではなく
最下部16a’に設けられる。Although the embodiments and the modified examples of the present invention have been described above, the illustrated shapes are only examples. The present invention is not limited to the above embodiments and modified examples, but can be implemented in various forms. For example, in the above-described embodiments and modifications, the center of the tapered portion 16 is the lowermost portion (the lowest portion), but the lowermost portion 16a 'may be shifted from the center as shown in FIG. In this case, the exhaust hole 20 is provided not at the center but at the lowermost portion 16a '.
【0036】また、略球形のろう材は無鉛ガラス製に限
定する必要は無く、鉛入りガラス製でもよいし、ニッケ
ル等の金属性であってもよい。The substantially spherical brazing material does not need to be limited to lead-free glass, but may be made of lead-containing glass or metallic such as nickel.
【0037】[0037]
【発明の効果】以上に説明したように、本発明によれ
ば、内ビンと外ビンとの間に密閉空間を有する真空二重
容器において、略球系のろう材を用いると共に外ビンの
底面の形状を工夫したことにより、真空二重容器の排気
及び封口工程におけるろう材のセット作業の機械化(自
動化)が可能になる。As described above, according to the present invention, in a vacuum double container having a closed space between an inner bottle and an outer bottle, a substantially spherical brazing material is used and the bottom surface of the outer bottle is used. By devising the shape of (1), it becomes possible to mechanize (automate) the brazing material setting operation in the evacuation and sealing steps of the vacuum double container.
【図1】本発明の第1の実施形態に係る真空二重容器の
一例を示し、(a)は底面図、(b)は底面を上にした
側面視の断面図である。FIGS. 1A and 1B show an example of a vacuum double container according to a first embodiment of the present invention, wherein FIG. 1A is a bottom view and FIG.
【図2】図1のテーパー部の中央部に設けられた凹部及
び排気孔を拡大して示し、(a)は底面図であり、
(b)は(a)におけるb−b断面図である。FIG. 2 is an enlarged view showing a concave portion and an exhaust hole provided at a central portion of a tapered portion in FIG. 1, wherein (a) is a bottom view,
(B) is bb sectional drawing in (a).
【図3】図2(b)に示した断面図の変形例を示す図で
あり、(a)は第1変形例、(b)は第2変形例、
(c)は第3変形例をそれぞれ示す。3A and 3B are diagrams showing a modification of the cross-sectional view shown in FIG. 2B, wherein FIG. 3A is a first modification, FIG. 3B is a second modification,
(C) shows a third modified example.
【図4】第2の実施形態に係る真空二重容器の一例を示
しており、(a)は底面図、(b)は底面を上にした外
ビン底部の側面視断面図である。4A and 4B show an example of a vacuum double container according to a second embodiment, in which FIG. 4A is a bottom view, and FIG. 4B is a side sectional view of the bottom of the outer bottle with the bottom face up.
【図5】第3の実施形態に係る真空二重容器のテーパー
部の中央部に設けられた凹部及び排気孔を拡大して示
し、(a)は底面図であり、(b)は(a)におけるb
−b断面図である。FIG. 5 is an enlarged view showing a concave portion and an exhaust hole provided at the center of a tapered portion of a vacuum double container according to a third embodiment, (a) is a bottom view, and (b) is (a). B) in
It is -b sectional drawing.
【図6】第1の実施形態に係るテーパー部の変形例を示
す底面図であり、(a)は第1変形例、(b)は第2変
形例をそれぞれ示している。FIG. 6 is a bottom view showing a modified example of the tapered portion according to the first embodiment, wherein (a) shows a first modified example and (b) shows a second modified example.
【図7】図4の変形例に係る真空二重容器の一例を示し
ており、(a)は底面図、(b)は底面を上にした外ビ
ン底部の側面視断面図である。7A and 7B show an example of a vacuum double container according to a modified example of FIG. 4, in which FIG. 7A is a bottom view, and FIG. 7B is a side sectional view of the bottom of the outer bottle with the bottom face up.
【図8】従来の真空二重容器の例を示す側面視の断面図
である。FIG. 8 is a side sectional view showing an example of a conventional vacuum double container.
10 真空二重容器 11 内ビン 12 外ビン 14 密閉空間 15 外ビンの底面 16 テーパー部 17 壁部 18 予備凹部 19 凹部 19a 凹部の底面 20 排気孔 21 ろう材 22 凸条部 23 溝 DESCRIPTION OF SYMBOLS 10 Vacuum double container 11 Inner bin 12 Outer bin 14 Closed space 15 Bottom surface of outer bin 16 Tapered part 17 Wall part 18 Preliminary concave part 19 Concave part 19a Bottom of concave part 20 Exhaust hole 21 Brazing material 22 Convex part 23 Groove
Claims (8)
を有する真空二重容器において、 前記外ビンの底面に凹状のテーパー部が形成され、前記
テーパー部の最下部又は最下部近傍に前記密閉空間と連
通する1又は複数の排気孔が設けられ、 略球形状のろう材を用いて前記排気孔が封口されている
ことを特徴とする真空二重容器。1. A vacuum double container having a sealed space between a metal inner bin and an outer bin, wherein a concave tapered portion is formed on a bottom surface of the outer bin, and a lowermost portion or a lowermost portion of the tapered portion. One or more exhaust holes communicating with the closed space are provided in the vicinity, and the exhaust holes are sealed with a substantially spherical brazing material.
段状に窪んだ平面視異形の凹部が形成され、前記ろう材
が前記凹部の底面から浮いた状態で前記凹部に保持され
るように構成され、前記凹部の底面又は側面に前記排気
孔が設けられていることを特徴とする請求項1記載の真
空二重容器。2. A stepped concave portion having a stepped concave shape is formed at the lowermost portion or near the lowermost portion of the tapered portion, and the brazing material is held in the concave portion while floating from the bottom surface of the concave portion. 2. The vacuum double container according to claim 1, wherein the exhaust hole is provided on a bottom surface or a side surface of the concave portion. 3.
の中央部に位置することを特徴とする請求項1又は2記
載の真空二重容器。3. The vacuum double container according to claim 1, wherein a lowermost portion of the tapered portion is located at a central portion of the tapered portion.
さの略1/3以上が前記凹状のテーパー部として形成さ
れ、前記テーパー部の外周に環状の壁部が形成されてい
ることを特徴とする請求項1、2又は3記載の真空二重
容器。4. A method according to claim 1, wherein at least one third of the length from the center to the outer periphery of the bottom surface of the outer bin is formed as the concave tapered portion, and an annular wall is formed at the outer periphery of the tapered portion. The vacuum double container according to claim 1, 2 or 3, wherein:
に1又は複数の予備凹部が形成されていることを特徴と
する請求項4記載の真空二重容器。5. The vacuum double container according to claim 4, wherein one or a plurality of preliminary concave portions are formed on the bottom surface outside the annular wall portion.
かって放射状に延びる1又は複数の溝又は凸条部が形成
されていることを特徴とする請求項1〜5のいずれか1
項記載の真空二重容器。6. The tapered portion according to claim 1, wherein one or more grooves or ridges extending radially from a central portion to an outer peripheral portion are formed.
Item 2. The vacuum double container according to item 1.
を有する真空二重容器の封口方法であって、 前記外ビンの底面に凹状のテーパー部を形成すると共に
前記テーパー部の最下部又は最下部近傍に前記密閉空間
と連通する1又は複数の排気孔を設け、 前記外ビンの底面が上になるように前記真空二重容器を
伏せた状態で所定の台に載置し、 前記テーパー部の上方から球状のろう材を落下し、該ろ
う材を前記テーパー部の最下部又は最下部近傍へ自然転
落させ、 真空室で前記密閉空間の排気を行った後、前記テーパー
部の最下部又は最下部近傍に位置する前記ろう材を溶か
すことにより前記排気孔を封口することを特徴とする真
空二重容器の封口方法。7. A method for sealing a vacuum double container having a sealed space between a metal inner bottle and an outer bottle, the method comprising: forming a concave tapered portion on the bottom surface of the outer bottle; One or more exhaust holes communicating with the sealed space are provided at the lowermost portion or near the lowermost portion, and the vacuum double container is placed on a predetermined table in a state where the vacuum double container is face down so that the bottom surface of the outer bottle is upward. The spherical brazing material is dropped from above the tapered portion, and the brazing material is naturally dropped to the lowermost portion or the vicinity of the lowermost portion of the tapered portion. After the closed space is evacuated in a vacuum chamber, the tapered portion is formed. Closing the exhaust hole by melting the brazing material located at the lowermost portion or near the lowermost portion of the vacuum container.
空間の排気の際の振動により前記真空二重容器が傾くと
きの最大傾斜角より大であることを特徴とする請求項7
記載の真空二重容器の封口方法。8. A tapered angle of the tapered portion is larger than a maximum tilt angle when the vacuum double container is tilted due to vibration at the time of evacuation of the closed space.
The method for sealing a vacuum double container as described above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2001160979A JP3692966B2 (en) | 2001-05-29 | 2001-05-29 | Vacuum double container and sealing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001160979A JP3692966B2 (en) | 2001-05-29 | 2001-05-29 | Vacuum double container and sealing method |
Publications (2)
Publication Number | Publication Date |
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JP2002345655A true JP2002345655A (en) | 2002-12-03 |
JP3692966B2 JP3692966B2 (en) | 2005-09-07 |
Family
ID=19004322
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Application Number | Title | Priority Date | Filing Date |
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JP2001160979A Expired - Fee Related JP3692966B2 (en) | 2001-05-29 | 2001-05-29 | Vacuum double container and sealing method |
Country Status (1)
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JP (1) | JP3692966B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105266654A (en) * | 2015-09-10 | 2016-01-27 | 膳魔师(中国)家庭制品有限公司 | Vacuum heat preservation container bottom sealing structure and sealing method thereof |
CN108888053A (en) * | 2018-07-18 | 2018-11-27 | 台州市泰澄电子科技有限公司 | A kind of pure titanium metal vacuum cup and its manufacturing process |
-
2001
- 2001-05-29 JP JP2001160979A patent/JP3692966B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105266654A (en) * | 2015-09-10 | 2016-01-27 | 膳魔师(中国)家庭制品有限公司 | Vacuum heat preservation container bottom sealing structure and sealing method thereof |
CN108888053A (en) * | 2018-07-18 | 2018-11-27 | 台州市泰澄电子科技有限公司 | A kind of pure titanium metal vacuum cup and its manufacturing process |
Also Published As
Publication number | Publication date |
---|---|
JP3692966B2 (en) | 2005-09-07 |
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