JP3916937B2 - Container body manufacturing method - Google Patents

Container body manufacturing method Download PDF

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Publication number
JP3916937B2
JP3916937B2 JP2001367271A JP2001367271A JP3916937B2 JP 3916937 B2 JP3916937 B2 JP 3916937B2 JP 2001367271 A JP2001367271 A JP 2001367271A JP 2001367271 A JP2001367271 A JP 2001367271A JP 3916937 B2 JP3916937 B2 JP 3916937B2
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Prior art keywords
cylindrical body
bottom member
inner cylinder
cylinder
peripheral edge
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JP2003164964A (en
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幸男 澁木
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株式会社セブン・セブン
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Description

【0001】
【発明の属する技術分野】
本発明は、調理鍋等の容器体の製造方法に関するものである。
【0002】
【従来の技術及び発明が解決しようとする課題】
シチュー等の煮込み料理を作る鍋として、容器を内容器と外容器とから成る二層構造とした保温性の高い調理鍋(容器体)が種々提案されている。尚、この調理鍋を用いての煮込み料理は、該調理鍋をコンロや電磁調理器等の加熱装置上に載置して調理物をある程度まで煮込んだ後、該加熱装置上から調理鍋をおろし、そのまま該調理鍋の保温性を利用して煮込みを進行させる。
【0003】
しかし、この種の二層構造の調理鍋は、底部が内容器の底壁と外容器の底壁とから成る二層構造である為、加熱装置での加熱が二層構造である分、調理物に伝達されにいという問題がある。
【0004】
更に、内容器の底壁と外容器の底壁との間を保温性の高い真空断熱層にした場合、より一層調理物に伝達されにくくなる。従って、二層構造を採用する場合には、内容器の底壁と外容器の底壁とは密着状態にする手段が採用されるが、このような手段を採用しても、わずかな歪みや寸法誤差によって内容器の底壁と外容器の底壁との間に真空断熱層が形成されてしまうことがあり、しかも、この内容器の底壁と外容器の底壁との間に形成されてしまう該真空断熱層は、存在の有無を確認する有効な手段が無い。
【0005】
更に、この種の二層構造の調理鍋は、内容器と外容器との間を空気断熱層とした場合、空気断熱層が真空断熱層より熱損失が大きいことは勿論、空気膨張による爆発事故が報告され、安全性に問題がある。
【0006】
また、この二層構造の調理鍋の製造は、絞り加工によって板材を有底筒体に変形することにより内容器及び外容器を夫々形成し、この内容器と外容器とを接合することにより行われているが、この製造方法の場合、有底筒体を形成する為の絞り加工が大変厄介であり、製造コスト高になるという問題点もある。
【0007】
本発明は、上記問題点を解決し得る調理鍋を効率的に製造する技術を提供するものである。
【0008】
【課題を解決するための手段】
添付図面を参照して本発明の要旨を説明する。
【0009】
上部開口部の周縁に外方へ突出する上鍔部2を、また、下部開口部の周縁に外方へ突出し通気孔4を適宜穿設した下鍔部3を夫々形成した無底の内筒体1と、この内筒体1の外側に被嵌可能で該被嵌状態において上部開口部の周縁及び下部開口部の周縁が夫々前記内筒体1の上鍔部2及び下鍔部3と当接若しくは近接する無底の外筒体5と、前記内筒体1の下鍔部3の下面に当接可能で該当接状態において前記通気孔4を閉塞する構成の底部材6とを設け、前記内筒体1の外側に前記外筒体5を被嵌して該内筒体1の上鍔部2及び下鍔部3と,該外筒体5の上部開口部の周縁及び下部開口部の周縁とを夫々連設し、続いて、内筒体1の下鍔部3の外面側にロウ付材7を介して前記底部材6を配設し、続いて、この内筒体1と外筒体5と底部材6とを真空加熱炉に配設し前記ロウ付材7を熔融せしめて真空封止することで内筒体1と外筒体5との間を真空層14とし側部8が真空断熱二層構造であり底部9が一層構造の容器体10を製造することを特徴とする容器体の製造方法に係るものである。
【0010】
また、請求項1記載の容器体の製造方法において、ロウ付材7を通気孔4の周囲に配設することを特徴とする容器体の製造方法に係るものである。
【0011】
また、請求項1,2いずれか1項に記載の容器体の製造方法において、内筒体1の下鍔部3の外面側にロウ付材7を介して前記底部材6を配設する際、内筒体1の下鍔部3が上方に位置する状態とし、この下鍔部3の上面側にロウ付材7を介して前記底部材6を配設することを特徴とする容器体の製造方法に係るものである。
【0012】
また、請求項1〜3いずれか1項に記載の容器体の製造方法において、底部材6の周縁部には、外筒体5の外側面に当接する被嵌条11が繞設されていることを特徴とする容器体の製造方法に係るものである。
【0013】
また、上部開口部の周縁に外方へ突出する上鍔部2を、また、下部開口部の周縁に外方へ突出する下鍔部3を夫々形成した無底の内筒体1と、この内筒体1の外側に被嵌可能で該被嵌状態において上部開口部の周縁及び下部開口部の周縁が夫々前記内筒体1の上鍔部2及び下鍔部3と当接若しくは近接し且つ下部開口部の周縁に通気孔12を適宜穿設した無底の外筒体5と、前記内筒体1の下鍔部3の下面に当接可能で且つ該当接状態において前記外筒体5の外側面に当接し前記通気孔12を閉塞する被嵌条11が繞設された底部材6とを設け、前記内筒体1の外側に前記外筒体5を被嵌して該内筒体1の上鍔部2と,該外筒体5の上部開口部の周縁とを夫々連設し、続いて、内筒体1の下鍔部3の下面に前記底部材6を配設して該底部材6の被嵌条11により前記通気孔12を覆い且つこの底部材6の被嵌条11と外筒体5の外面との間にロウ付材13を配設し、続いて、この内筒体1と外筒体5と底部材6とを真空加熱炉に配設し前記ロウ付材13を熔融せしめて真空封止することで内筒体1の下鍔部3と外筒体5の下部開口部の周縁と底部材6の被嵌条11とを接合し且つ内筒体1と外筒体5との間を真空層14とし側部8が真空断熱二層構造であり底部9が一層構造の容器体10を製造することを特徴とする容器体の製造方法に係るものである。
【0014】
また、上部開口部の周縁に外方へ突出する上鍔部2を、また、下部開口部の周縁に外方へ突出する下鍔部3を夫々形成した無底の内筒体1と、この内筒体1の外側に被嵌可能で該被嵌状態において上部開口部の周縁及び下部開口部の周縁が夫々前記内筒体1の上鍔部2及び下鍔部3と当接若しくは近接し且つ下部開口部の周縁に通気孔12を適宜穿設した無底の外筒体5と、前記内筒体1の下鍔部3の下面に当接可能で且つ該当接状態において前記通気孔12を閉塞する閉塞部15が設けられた底部材6とを設け、前記内筒体1の外側に前記外筒体5を被嵌して該内筒体1の上鍔部2及び下鍔部3と,該外筒体5の上部開口部の周縁及び下部開口部の周縁とを夫々連設し、続いて、内筒体1の下鍔部3の下面に前記底部材6を配設して該底部材6の閉塞部15により前記通気孔12を覆い且つこの閉塞部15と外筒体5の外側面との間にロウ付材13を配設し、続いて、この内筒体1と外筒体5と底部材6とを真空加熱炉に配設し前記ロウ付材13を熔融せしめて真空封止することで内筒体1と外筒体5との間を真空層14とし側部8が真空断熱二層構造であり底部9が一層構造の容器体10を製造することを特徴とする容器体の製造方法に係るものである。
【0015】
【発明の作用及び効果】
本発明により製造される容器体10は、側部8は真空断熱二層構造が採用されているから高い保温性を発揮し、しかも、底部9は一層構造が採用されているから該容器体10に入れる調理物に良好に伝熱することができ、よって、高い保温性と調理物への良好な伝熱性とを兼ね備えたものとなる。
【0016】
また、無底の内筒体1と無底の外筒体5と底部材6とを接合することで容器体10を製造する方法を採用し、形成の厄介な有底筒体は使用しないから、容器体10の製造は簡単且つコスト安となる。
【0017】
しかも、無底の内筒体1及び無底の外筒体5は、簡単且つコスト安の方法、例えば板材をロール加工する方法によって形成することができ、この点においても容器体10の製造は簡単且つコスト安となる。
【0018】
また、内筒体1の上部開口部及び下部開口部に上鍔部2及び下鍔部3を形成しているから、内筒体1と外筒体5との間に十分な空間を確保することができ、よって、この空間を利用することで真空層14を良好に形成することができる。
【0019】
また、上鍔部2及び下鍔部3は、例えば無底の内筒体1の上部開口部及び下部開口部を拡径変形する方法により簡単に形成することができ、この点においても容器体10の製造は簡単且つコスト安となる。
【0020】
また、内筒体1の下鍔部3に通気孔4を適宜穿設し、予め連設した内筒体1及び外筒体5と,底部材6とを連設する際、該通気孔4を利用して該連設と共に該内筒体1と外筒体5との間に真空層14を形成する真空封止を同時に行うから、容器体10の製造工程を簡略化することができ、よって、この点において容器体10を効率良く簡単に製造することができる。
【0021】
本発明は上述のようにするから、高い保温性と調理物への良好な伝熱性とを兼ね備えた容器体を簡単,コスト安且つ効率的に製造できる実用性に秀れた容器体の製造方法となる。
【0022】
【発明の実施の形態】
図1〜3は第一実施例、図4,5は第二実施例、図6は第三実施例を図示したものであり、以下に説明する。
【0023】
先ず、第一実施例について詳述する。
【0024】
金属製の板材をロール加工等により湾曲せしめて筒状とし、この筒状にした板材の端部同志を接合して上部開口部と下部開口部とを有する筒体を形成する。
【0025】
続いて、この筒体の上部開口部及び下部開口部を夫々拡径せしめ、上部開口部の周縁に外方へ突出する上鍔部2を、また、下部開口部の周縁に下鍔部3を形成する。
【0026】
続いて、下鍔部3に通気孔4を適宜穿設し、内筒体1とする。
【0027】
この通気孔4の穿設は、下鍔部3の形成時であっても良い。
【0028】
また、この通気孔4は最低一つあれば良い。
【0029】
尚、図面は、前記内筒体1の上部開口部に別体の蓋16を載置する為の拡径部17を設けた場合である。この拡径部17の形成は、前記上鍔部2の形成の際に略同時に行うと良い。
【0030】
一方、金属製の板材をロール加工等により湾曲せしめて前記内筒体1の下鍔部3若しくは上鍔部2の周縁より若干径大の筒状とし、この筒状にした板材の端部同志を接合して上部開口部と下部開口部とを有する外筒体5を形成する。
【0031】
また、この外筒体5と前記内筒体1とは略同じ高さに設定される。
【0032】
また一方、金属製の板材を打ち抜くことで、前記内筒体1の下鍔部3の下面に当接可能な底部材6を形成する。
【0033】
また、第一実施例の底部材6は、前記金属製の板材を前記内筒体1の下鍔部3が当接する部位より径大に打ち抜き、この径大部を折り曲げ加工することで該径大部を前記内筒体1の外側面に当接可能で繞設状態の被嵌条11としたものを採用している。
【0034】
尚、この被嵌条11は、底部材6の全周縁に繞設されていなくても、例えば、所定間隔を置いて複数箇所設けられた構成等であっても良い。
【0035】
以上の工程により得られた内筒体1,外筒体5及び底部材6は、下記の工程によって連設し、側部8が真空断熱二層構造であり底部9が一層構造の容器体10とする。
【0036】
先ず、内筒体1の外側に外筒体5を被嵌して該内筒体1の上鍔部2及び下鍔部3と,該外筒体5の上部開口部の周縁及び下部開口部の周縁とを溶接等によって夫々連設する。
【0037】
続いて、内筒体1の下鍔部3の外面側にロウ付材7を介して前記底部材6を配設する。この際、ロウ付材7は、特に前記通気孔4の周囲に配設する。また、このロウ付材7を下鍔部3の外面に沿って繞設状態に配設しても良い。
【0038】
この工程において、前記被嵌条11は、連設された内筒体1及び外筒体5に対する底部材6の位置決め作用を発揮する。
【0039】
また、この工程の際、連設された内筒体1及び外筒体5を該内筒体1の下鍔部3が上方に位置する状態とし、この下鍔部3の上面側にロウ付材7を介して前記底部材6を配設する方法を採用しても良い(図2は、この方法を図示している。)。この方法の場合、下鍔部3に穿設された通気孔4が上方に露出することになり、前記ロウ付材7の配設を良好に行うことができる。
【0040】
続いて、この内筒体1と外筒体5と底部材6とを真空加熱炉に導入する。
【0041】
続いて、真空加熱炉内を真空にしていくことで、内筒体1と外筒体5との間の空気を前記通気孔4,及び前記外筒体5の外側面と底部材6の被嵌条11の内側面との隙間を経由して徐々に抜き、真空にしていく。また、真空加熱炉内を真空にしていく際、真空加熱炉内を加熱して前記ロウ付材7の熔融温度に近づけていく。
【0042】
続いて、真空加熱炉内が真空となることで前記内筒体1と前記外筒体5との間を真空とした後、真空加熱炉内を前記ロウ付材7が熔融する温度に加熱して該ロウ付材7を熔融せしめ、前記内筒体1と前記外筒体5との間を真空封止して真空層14を形成する。この際、熔融したロウ付材7の漏洩は、前記被嵌条11によって阻止される。
【0043】
続いて、真空加熱炉内を冷却することで前記熔融したロウ付材7を固化せしめ、側部8が真空断熱二層構造であり底部9が一層構造の容器体10を形成する。
【0044】
第一実施例は上述のようにするから、高い保温性と調理物への良好な伝熱性とを兼ね備えた容器体10を絞り加工等の厄介な加工を行わずに効率的に製造できる実用性,生産性に秀れた容器体の製造方法となる。
【0045】
また、内筒体1と外筒体5との間の真空封止と,底部材6の付設とを同時に行うから、この点においても、それだけ効率的に容器体10を製造することができる。
【0046】
また、底部材6には被嵌条11が設けられているから、底部材6を配設する際の位置決めが容易で、且つ、真空封止の際に熔融したロウ付材7が漏洩せず、この点においても、それだけ効率的に容器体10を製造することができる。
【0047】
尚、真空封止の前において内筒体1の上鍔部2と外筒体5の上部開口部とだけを連設し、真空封止の際、前記ロウ付材7により内筒体1の下鍔部3と外筒体5の下部開口部との連設を該真空封止と同時に行う方法を採用しても良い。
【0048】
次に、第二実施例について詳述する。
【0049】
内筒体1及び外筒体5は第一実施例と同様に形成する。但し、内筒体1の下鍔部3に通気孔4を穿設せず、外筒体5の下部開口部の周縁に通気孔12を適宜穿設する。
【0050】
この通気孔12は、図面では外筒体5の下部開口部の周縁の対向位置に二つ設けた場合を図示しているが、最低ひとつあれば良い。
【0051】
底筒体6も第一実施例と同様に形成する。但し、被嵌条11は必須である。
【0052】
この被嵌条11は、底筒体6の全周縁、即ち、該被嵌条11が当接する外筒体5の外側面の全周に当接するように構成される。また、この被嵌条11は、底部材6を内筒体1の下鍔部3の下面に当接した際、該被嵌条11が前記通気孔12を隠蔽するように構成される。
【0053】
また、この底筒体6は、内筒体1の下鍔部3の下面に当接した際に被嵌条11と外筒体5の外側面との間に若干隙間を生じるように構成される。
【0054】
以上の工程により得られた内筒体1,外筒体5及び底部材6は、下記の工程によって連設し、側部8が真空断熱二層構造であり底部9が一層構造の容器体10とする。
【0055】
先ず、内筒体1の外側に外筒体5を被嵌して該内筒体1の上鍔部2,該外筒体5の上部開口部の周縁とを溶接等によって連設する。
【0056】
続いて、この連設された内筒体1と外筒体5とを底部材6上に配設し、底部材6の被嵌条11によって前記外筒体5に設けられた通気孔12を覆う。
【0057】
続いて、被嵌条11と外筒体5の外側面との間にロウ付材13を配設する。
【0058】
このロウ付材13は、少なくとも熔融後に通気孔12を閉塞できる位置に配設する。また、外筒体5の外側面全周に配設した方が良い。
【0059】
また、図面は、被嵌条11の上縁にロウ付材13を載置状態に配設する場合を図示しているが、例えば、被嵌条11と外筒体5の外側面との間に該被嵌条11の金属弾性を利用して挟持する方法を採用しても良い。
【0060】
また、被嵌条11が連設された内筒体1及び外筒体5に対する底部材6の位置決め作用を発揮する点は、第一実施例と同様である。
【0061】
続いて、この内筒体1と外筒体5と底部材6とを真空加熱炉に導入し、第一実施例と同様に内筒体1と前記外筒体5との間を真空封止し、側部8が真空断熱二層構造であり底部9が一層構造の容器体10を形成する。
【0062】
この際、熔融したロウ付材13が、底部材6の被嵌条11と外筒体5の外側面との間に導入されて降下し、前記通気孔12を閉塞すると共に、内筒体1の下鍔部3と外筒体5の下部開口部と底部材6とを連設することになる。
【0063】
第二実施例は上述のようにするから、第一実施例と同様、高い保温性と調理物への良好な伝熱性とを兼ね備えた容器体10を絞り加工等の厄介な加工を行わずに効率的に製造できる実用性,生産性に秀れた容器体の製造方法となる。
【0064】
また、内筒体1と外筒体5との間の真空封止と,該内筒体1と該外筒体5と底部材6の接合とを同時に行うから、この点においても、それだけ効率的に容器体10を製造することができる。
【0065】
また、その余は第一実施例と同様である。
【0066】
次に、第三実施例について詳述する。
【0067】
第三実施例は第二実施例の別例であり、真空封止の前において内筒体1の上鍔部2及び下鍔部3と,外筒体5の上部開口部及び下部開口部とを夫々連設するものである。
【0068】
この場合に用いられる底部材6は、第二実施例で使用した被嵌条11が設けられたタイプであっても良いが、例えば、図3に図示したような、被嵌条11の代わりに外筒体5の通気孔12を閉塞する為の閉塞部15が設けられたタイプであっても良い。
【0069】
また、この閉塞部15の上縁は、ロウ付材13を配設し易いように平縁に構成している。
【0070】
また、この閉塞部15は、金属製の板材から底部材6を打ち抜いた後、該閉塞部15を折曲せしめることで簡単に形成することができる。
【0071】
また、閉塞部15以外の底部材6と外筒体5の外側面との間にもロウ付材を配設し、このロウ付材によって底部材6と内筒体1と外筒体5との連設強度を高める方法を採用しても良い。
【0072】
第三実施例は上述のようにするから、第一及び第二実施例と同様、高い保温性と調理物への良好な伝熱性とを兼ね備えた容器体10を絞り加工等の厄介な加工を行わずに効率的に製造できる実用性,生産性に秀れた容器体の製造方法となる。
【0073】
また、その余は第一及び第二実施例と同様である。
【図面の簡単な説明】
【図1】第一実施例の説明分解斜視図である。
【図2】第一実施例の真空加熱炉に導入する前の状態を示す説明側断面図である。
【図3】第一実施例の説明側断面図である。
【図4】第二実施例の説明分解斜視図である。
【図5】第二実施例の真空加熱炉に導入する前の状態を示す説明側断面図である。
【図6】第三実施例の底部材6の説明斜視図である。
【符号の説明】
1 内筒体
2 上鍔体
3 下鍔体
4 通気孔
5 外筒体
6 底部材
7 ロウ付材
8 側部
9 底部
10 容器体
11 被嵌条
12 通気孔
13 ロウ付材
14 真空層
15 閉塞部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a container such as a cooking pot.
[0002]
[Prior art and problems to be solved by the invention]
Various hot pots (containers) having a two-layered structure consisting of an inner container and an outer container have been proposed as pots for stewed dishes such as stews. In addition, the stewed dish using this cooking pan is placed on a heating device such as a stove or an electromagnetic cooker to boil the food to a certain extent, and then the cooking pan is lowered from the heating device. Then, stew is allowed to proceed using the heat retaining property of the cooking pan as it is.
[0003]
However, this type of two-layer cooking pot has a two-layer structure in which the bottom part is composed of the bottom wall of the inner container and the bottom wall of the outer container. There is a problem that it is difficult to be transmitted to things.
[0004]
Furthermore, when a vacuum heat insulating layer with high heat retention is provided between the bottom wall of the inner container and the bottom wall of the outer container, it is more difficult to transmit to the cooked food. Therefore, when adopting a two-layer structure, means for bringing the bottom wall of the inner container and the bottom wall of the outer container into close contact with each other is adopted. Due to dimensional errors, a vacuum insulation layer may be formed between the bottom wall of the inner container and the bottom wall of the outer container, and it is formed between the bottom wall of the inner container and the bottom wall of the outer container. There is no effective means for confirming the presence or absence of the vacuum heat insulating layer.
[0005]
In addition, this type of two-layer cooking pan has an air insulation layer with a larger heat loss than the vacuum insulation layer when the space between the inner and outer containers is an air insulation layer. Is reported and there is a safety problem.
[0006]
In addition, the two-layered cooking pot is manufactured by forming the inner container and the outer container by deforming the plate material into a bottomed cylindrical body by drawing and joining the inner container and the outer container. However, in the case of this manufacturing method, there is a problem that the drawing process for forming the bottomed cylindrical body is very troublesome and the manufacturing cost is increased.
[0007]
The present invention provides a technique for efficiently producing a cooking pot capable of solving the above problems.
[0008]
[Means for Solving the Problems]
The gist of the present invention will be described with reference to the accompanying drawings.
[0009]
A bottomless inner cylinder in which an upper collar portion 2 projecting outward is formed at the periphery of the upper opening, and a lower collar section 3 projecting outward at the periphery of the lower opening and appropriately formed with a vent hole 4 is formed. The body 1 can be fitted to the outside of the inner cylindrical body 1 and the peripheral edge of the upper opening and the peripheral edge of the lower opening in the fitted state are respectively the upper collar portion 2 and the lower collar portion 3 of the inner cylindrical body 1. There is provided a bottomless outer cylindrical body 5 that is in contact with or close to the bottom, and a bottom member 6 that is configured to be able to contact the lower surface of the lower collar portion 3 of the inner cylindrical body 1 and close the vent hole 4 in a corresponding contact state. The outer cylinder body 5 is fitted on the outer side of the inner cylinder body 1 so that the upper collar portion 2 and the lower collar portion 3 of the inner cylinder body 1 and the peripheral edge and the lower opening of the upper opening portion of the outer cylinder body 5 The bottom member 6 is disposed on the outer surface side of the lower collar portion 3 of the inner cylinder 1 via the brazing material 7, and then the inner cylinder 1 And outer cylinder 5 and bottom member Is disposed in a vacuum heating furnace, and the brazing material 7 is melted and vacuum-sealed to form a vacuum layer 14 between the inner cylindrical body 1 and the outer cylindrical body 5, and the side portion 8 has a vacuum heat insulating two-layer structure. And a bottom body 9 for manufacturing a container body 10 having a single-layer structure.
[0010]
The method for manufacturing a container body according to claim 1, wherein the brazing material 7 is disposed around the vent hole 4.
[0011]
Further, in the container body manufacturing method according to any one of claims 1 and 2, when the bottom member 6 is disposed on the outer surface side of the lower flange portion 3 of the inner cylindrical body 1 via the brazing material 7. The container body is characterized in that the lower collar part 3 of the inner cylinder 1 is positioned upward, and the bottom member 6 is disposed on the upper surface side of the lower collar part 3 via a brazing material 7. It relates to a manufacturing method.
[0012]
Further, in the method for manufacturing a container body according to any one of claims 1 to 3, a fitting strip 11 that comes into contact with the outer surface of the outer cylindrical body 5 is provided on the peripheral edge of the bottom member 6. The present invention relates to a method for manufacturing a container body.
[0013]
Further, there is a bottomless inner cylindrical body 1 in which an upper flange portion 2 protruding outward is formed at the periphery of the upper opening portion, and a lower flange portion 3 protruding outward is formed at the periphery of the lower opening portion, respectively. It can be fitted to the outer side of the inner cylinder 1, and in the fitted state, the peripheral edge of the upper opening and the peripheral edge of the lower opening are in contact with or close to the upper collar 2 and lower collar 3 of the inner cylinder 1, respectively. Further, a bottomless outer cylindrical body 5 having an air hole 12 appropriately drilled in the periphery of the lower opening, and a lower surface of the lower collar portion 3 of the inner cylindrical body 1, and the outer cylindrical body in a corresponding contact state. 5 and a bottom member 6 provided with a fitting strip 11 that closes the vent hole 12 in contact with the outer side surface of the outer cylindrical body 5, and the outer cylindrical body 5 is fitted on the outer side of the inner cylindrical body 1. The upper collar portion 2 of the cylindrical body 1 and the peripheral edge of the upper opening of the outer cylindrical body 5 are connected in series, and then the bottom member 6 is disposed on the lower surface of the lower collar portion 3 of the inner cylindrical body 1. Then, the strip 1 of the bottom member 6 1 covers the vent hole 12 and a brazing material 13 is disposed between the fitted strip 11 of the bottom member 6 and the outer surface of the outer cylinder 5, and then the inner cylinder 1 and the outer cylinder 5 and the bottom member 6 are disposed in a vacuum heating furnace, and the brazing material 13 is melted and vacuum-sealed, whereby the lower flange portion 3 of the inner cylinder 1 and the peripheral edge of the lower opening of the outer cylinder 5 A container body 10 having a bottom layer 6 joined to the fitting strip 11 and a vacuum layer 14 between the inner cylindrical body 1 and the outer cylindrical body 5 and a side portion 8 having a vacuum heat insulating two-layer structure and a bottom portion 9 having a single layer structure. The present invention relates to a method for manufacturing a container body.
[0014]
Further, there is a bottomless inner cylindrical body 1 in which an upper flange portion 2 protruding outward is formed at the periphery of the upper opening portion, and a lower flange portion 3 protruding outward is formed at the periphery of the lower opening portion, respectively. It can be fitted to the outer side of the inner cylinder 1, and in the fitted state, the peripheral edge of the upper opening and the peripheral edge of the lower opening are in contact with or close to the upper collar 2 and lower collar 3 of the inner cylinder 1, respectively. In addition, the bottomless outer cylindrical body 5 having an air hole 12 appropriately drilled in the peripheral edge of the lower opening, and the lower surface of the lower collar portion 3 of the inner cylindrical body 1 can be brought into contact with the air hole 12 in the corresponding contact state. And a bottom member 6 provided with a closing portion 15 for closing the outer cylindrical body 5, and the outer cylindrical body 5 is fitted on the outer side of the inner cylindrical body 1 so that the upper and lower collar portions 2 and 3 of the inner cylindrical body 1 are fitted. And the peripheral edge of the upper opening of the outer cylinder 5 and the peripheral edge of the lower opening, respectively. Subsequently, the bottom member 6 is disposed on the lower surface of the lower flange 3 of the inner cylinder 1. Closing the bottom member 6 A portion 15 covers the vent hole 12 and a brazing material 13 is disposed between the closed portion 15 and the outer side surface of the outer cylindrical body 5, and then the inner cylindrical body 1, the outer cylindrical body 5 and the bottom portion. The material 6 is disposed in a vacuum heating furnace, and the brazing material 13 is melted and vacuum-sealed, whereby a vacuum layer 14 is formed between the inner cylinder 1 and the outer cylinder 5, and the side portion 8 is vacuum insulated. The present invention relates to a container body manufacturing method characterized by manufacturing a container body 10 having a layer structure and a bottom portion 9 having a single layer structure.
[0015]
[Action and effect of the invention]
The container body 10 manufactured according to the present invention exhibits high heat retention because the side portion 8 employs a vacuum heat insulating two-layer structure, and the bottom portion 9 employs a single layer structure. Heat can be satisfactorily transferred to the food to be put in, so that it has both high heat retention and good heat transfer to the food.
[0016]
Further, a method of manufacturing the container body 10 by joining the bottomless inner cylindrical body 1, the bottomless outer cylindrical body 5 and the bottom member 6 is employed, and a troubled bottomed cylindrical body is not used. The manufacture of the container body 10 is simple and inexpensive.
[0017]
In addition, the bottomless inner cylinder 1 and the bottomless outer cylinder 5 can be formed by a simple and cost-effective method, for example, a method of rolling a plate material. Easy and low cost.
[0018]
Moreover, since the upper collar part 2 and the lower collar part 3 are formed in the upper opening part and lower opening part of the inner cylinder 1, sufficient space is ensured between the inner cylinder 1 and the outer cylinder 5. Therefore, the vacuum layer 14 can be satisfactorily formed by using this space.
[0019]
Moreover, the upper collar part 2 and the lower collar part 3 can be easily formed by, for example, a method of expanding and deforming the upper opening and the lower opening of the bottomless inner cylindrical body 1. The manufacture of 10 is simple and cheap.
[0020]
Also, when the vent hole 4 is appropriately drilled in the lower flange portion 3 of the inner cylinder 1 and the inner cylinder 1 and the outer cylinder 5 and the bottom member 6 which are previously arranged are continuously arranged, the vent hole 4 is provided. Since the vacuum sealing for forming the vacuum layer 14 between the inner cylinder 1 and the outer cylinder 5 is performed simultaneously with the continuous arrangement, the manufacturing process of the container body 10 can be simplified. Therefore, the container body 10 can be efficiently and easily manufactured in this respect.
[0021]
Since the present invention is as described above, a container body manufacturing method excellent in practicality capable of easily, cost-effectively and efficiently manufacturing a container body having both high heat retention and good heat transfer to a cooked product. It becomes.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show the first embodiment, FIGS. 4 and 5 show the second embodiment, and FIG. 6 shows the third embodiment, which will be described below.
[0023]
First, the first embodiment will be described in detail.
[0024]
A metal plate material is bent by roll processing or the like to form a cylinder, and ends of the cylindrical plate material are joined to form a cylinder having an upper opening and a lower opening.
[0025]
Subsequently, the upper opening portion and the lower opening portion of the cylindrical body are expanded in diameter, respectively, the upper collar portion 2 protruding outward at the periphery of the upper opening portion, and the lower collar portion 3 at the periphery of the lower opening portion. Form.
[0026]
Subsequently, a vent hole 4 is appropriately drilled in the lower collar part 3 to obtain an inner cylinder 1.
[0027]
The ventilation hole 4 may be formed when the lower collar part 3 is formed.
[0028]
Further, at least one vent hole 4 is sufficient.
[0029]
The drawing shows a case where an enlarged diameter portion 17 for mounting a separate lid 16 is provided in the upper opening portion of the inner cylinder 1. The enlarged diameter portion 17 is preferably formed substantially simultaneously with the formation of the upper collar portion 2.
[0030]
On the other hand, the metal plate material is bent by roll processing or the like to form a cylindrical shape having a diameter slightly larger than the peripheral edge of the lower collar portion 3 or the upper collar portion 2 of the inner cylindrical body 1. Are joined to form an outer cylinder 5 having an upper opening and a lower opening.
[0031]
The outer cylinder 5 and the inner cylinder 1 are set at substantially the same height.
[0032]
On the other hand, the bottom member 6 which can contact | abut to the lower surface of the lower collar part 3 of the said inner cylinder 1 is formed by punching out a metal board | plate material.
[0033]
Further, the bottom member 6 of the first embodiment is formed by punching the metal plate material in a larger diameter than a portion where the lower collar portion 3 of the inner cylindrical body 1 abuts, and bending the large diameter portion to process the diameter. The most adopted is a hooked strip 11 that can be brought into contact with the outer surface of the inner cylinder 1.
[0034]
Note that the fitting strip 11 may not be provided on the entire periphery of the bottom member 6 but may have a configuration in which a plurality of portions are provided at predetermined intervals, for example.
[0035]
The inner cylinder 1, the outer cylinder 5 and the bottom member 6 obtained by the above steps are connected in series by the following steps, and the side portion 8 has a vacuum heat insulating two-layer structure and the bottom portion 9 has a single layer structure. And
[0036]
First, the outer cylindrical body 5 is fitted on the outer side of the inner cylindrical body 1 so that the upper flange portion 2 and the lower flange portion 3 of the inner cylindrical body 1 and the peripheral edge and the lower opening portion of the upper opening portion of the outer cylindrical body 5 The peripheral edge of each of them is connected by welding or the like.
[0037]
Subsequently, the bottom member 6 is disposed on the outer surface side of the lower flange portion 3 of the inner cylindrical body 1 via the brazing material 7. At this time, the brazing material 7 is disposed particularly around the vent hole 4. Further, the brazing material 7 may be disposed in a rigged state along the outer surface of the lower collar portion 3.
[0038]
In this step, the fitted strip 11 exhibits a positioning action of the bottom member 6 with respect to the continuous inner cylinder 1 and outer cylinder 5.
[0039]
Further, in this process, the inner cylinder 1 and the outer cylinder 5 that are continuously provided are in a state in which the lower flange portion 3 of the inner cylinder 1 is located above, and the upper flange side of the lower flange portion 3 is brazed. You may employ | adopt the method of arrange | positioning the said bottom member 6 via the material 7 (FIG. 2 illustrates this method). In the case of this method, the vent hole 4 formed in the lower collar portion 3 is exposed upward, and the brazing material 7 can be disposed satisfactorily.
[0040]
Subsequently, the inner cylinder 1, the outer cylinder 5, and the bottom member 6 are introduced into a vacuum heating furnace.
[0041]
Subsequently, by vacuuming the inside of the vacuum heating furnace, the air between the inner cylindrical body 1 and the outer cylindrical body 5 is evacuated to the vent holes 4 and the outer surface of the outer cylindrical body 5 and the covering of the bottom member 6. The vacuum is gradually removed through a gap between the inner surface of the fitting 11 and a vacuum is formed. Further, when the vacuum heating furnace is evacuated, the vacuum heating furnace is heated to approach the melting temperature of the brazing material 7.
[0042]
Subsequently, the vacuum heating furnace is evacuated to create a vacuum between the inner cylinder 1 and the outer cylinder 5, and then the vacuum heating furnace is heated to a temperature at which the brazing material 7 melts. Then, the brazing material 7 is melted, and the space between the inner cylinder 1 and the outer cylinder 5 is vacuum-sealed to form a vacuum layer 14. At this time, leakage of the melted brazing material 7 is prevented by the fitted strip 11.
[0043]
Subsequently, the melted brazing material 7 is solidified by cooling the inside of the vacuum heating furnace to form a container body 10 in which the side portion 8 has a vacuum heat insulating two-layer structure and the bottom portion 9 has a single layer structure.
[0044]
Since the first embodiment is as described above, it is possible to efficiently manufacture the container body 10 having both high heat retention and good heat transfer to the cooked food without performing troublesome processing such as drawing. , It becomes a manufacturing method of a container body with excellent productivity.
[0045]
Further, since the vacuum sealing between the inner cylindrical body 1 and the outer cylindrical body 5 and the attachment of the bottom member 6 are performed simultaneously, the container body 10 can be efficiently manufactured in this respect as well.
[0046]
Further, since the bottom member 6 is provided with the fitting strip 11, the positioning when arranging the bottom member 6 is easy, and the brazing material 7 melted during vacuum sealing does not leak. Also in this respect, the container body 10 can be manufactured more efficiently.
[0047]
Prior to vacuum sealing, only the upper flange portion 2 of the inner cylinder 1 and the upper opening of the outer cylinder 5 are connected in series, and the brazing material 7 is used to seal the inner cylinder 1 at the time of vacuum sealing. You may employ | adopt the method of connecting the lower collar part 3 and the lower opening part of the outer cylinder 5 simultaneously with this vacuum sealing.
[0048]
Next, the second embodiment will be described in detail.
[0049]
The inner cylinder 1 and the outer cylinder 5 are formed in the same manner as in the first embodiment. However, the vent hole 4 is not drilled in the lower flange portion 3 of the inner cylinder 1, and the vent hole 12 is appropriately drilled in the periphery of the lower opening of the outer cylinder 5.
[0050]
In the drawing, the case where two vent holes 12 are provided at positions opposed to the periphery of the lower opening of the outer cylindrical body 5 is illustrated, but at least one vent hole 12 may be provided.
[0051]
The bottom cylinder 6 is also formed in the same manner as in the first embodiment. However, the covered strip 11 is essential.
[0052]
The fitted strip 11 is configured to be in contact with the entire peripheral edge of the bottom cylindrical body 6, that is, the entire circumference of the outer surface of the outer cylindrical body 5 with which the covered strip 11 is in contact. Further, the fitted strip 11 is configured such that the fitted strip 11 hides the vent hole 12 when the bottom member 6 is brought into contact with the lower surface of the lower collar portion 3 of the inner cylindrical body 1.
[0053]
Further, the bottom cylinder 6 is configured such that a slight gap is generated between the fitted strip 11 and the outer surface of the outer cylinder 5 when it contacts the lower surface of the lower collar portion 3 of the inner cylinder 1. The
[0054]
The inner cylinder 1, the outer cylinder 5 and the bottom member 6 obtained by the above steps are connected in series by the following steps, and the side portion 8 has a vacuum heat insulating two-layer structure and the bottom portion 9 has a single layer structure. And
[0055]
First, the outer cylinder 5 is fitted on the outer side of the inner cylinder 1, and the upper collar portion 2 of the inner cylinder 1 and the periphery of the upper opening of the outer cylinder 5 are connected by welding or the like.
[0056]
Subsequently, the continuous inner cylinder 1 and outer cylinder 5 are disposed on the bottom member 6, and the vent hole 12 provided in the outer cylinder 5 by the fitting strip 11 of the bottom member 6 is provided. cover.
[0057]
Subsequently, a brazing material 13 is disposed between the fitted strip 11 and the outer surface of the outer cylinder 5.
[0058]
The brazing material 13 is disposed at a position at which the vent hole 12 can be closed at least after melting. Further, it is better to arrange the outer cylinder 5 around the entire outer surface.
[0059]
Further, the drawing shows the case where the brazing material 13 is placed on the upper edge of the fitted strip 11, but for example, between the fitted strip 11 and the outer surface of the outer cylindrical body 5. Alternatively, a method of clamping using the metal elasticity of the fitted strip 11 may be adopted.
[0060]
Moreover, the point which exhibits the positioning effect | action of the bottom member 6 with respect to the inner cylinder 1 and the outer cylinder 5 in which the to-be-fitted strip 11 was provided continuously is the same as that of a 1st Example.
[0061]
Subsequently, the inner cylindrical body 1, the outer cylindrical body 5 and the bottom member 6 are introduced into a vacuum heating furnace, and the space between the inner cylindrical body 1 and the outer cylindrical body 5 is vacuum sealed as in the first embodiment. The side portion 8 has a vacuum heat insulating two-layer structure, and the bottom portion 9 forms a single-layered container body 10.
[0062]
At this time, the molten brazing material 13 is introduced and lowered between the fitted strip 11 of the bottom member 6 and the outer surface of the outer cylindrical body 5 to block the vent hole 12, and the inner cylindrical body 1. The lower collar 3, the lower opening of the outer cylinder 5, and the bottom member 6 are connected.
[0063]
Since the second embodiment is as described above, similarly to the first embodiment, the container body 10 having both high heat retention and good heat transfer to the cooked product is not subjected to troublesome processing such as drawing. This is a method for manufacturing a container body that can be efficiently manufactured and has excellent practicality and productivity.
[0064]
In addition, since the vacuum sealing between the inner cylinder 1 and the outer cylinder 5 and the joining of the inner cylinder 1, the outer cylinder 5 and the bottom member 6 are performed at the same time, the efficiency can be increased accordingly. Thus, the container body 10 can be manufactured.
[0065]
The rest is the same as in the first embodiment.
[0066]
Next, the third embodiment will be described in detail.
[0067]
The third embodiment is another example of the second embodiment, and before vacuum sealing, the upper flange portion 2 and the lower flange portion 3 of the inner cylindrical body 1, the upper opening portion and the lower opening portion of the outer cylindrical body 5, Are connected in series.
[0068]
The bottom member 6 used in this case may be of the type provided with the fitted strip 11 used in the second embodiment. For example, instead of the fitted strip 11 as shown in FIG. A type provided with a closing portion 15 for closing the vent hole 12 of the outer cylinder 5 may be used.
[0069]
In addition, the upper edge of the closing portion 15 is formed as a flat edge so that the brazing material 13 can be easily disposed.
[0070]
Further, the closed portion 15 can be easily formed by punching the bottom member 6 from a metal plate and then bending the closed portion 15.
[0071]
Further, a brazing material is also disposed between the bottom member 6 other than the closing portion 15 and the outer surface of the outer cylinder 5, and the brazing material causes the bottom member 6, the inner cylinder 1, and the outer cylinder 5 to be connected to each other. You may employ | adopt the method of raising the continuous installation strength of.
[0072]
Since the third embodiment is as described above, like the first and second embodiments, troublesome processing such as drawing processing is performed on the container body 10 having both high heat retention and good heat transfer to the cooked food. It becomes a manufacturing method of a container body excellent in practicality and productivity that can be efficiently manufactured without performing.
[0073]
The rest is the same as in the first and second embodiments.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a first embodiment.
FIG. 2 is an explanatory side sectional view showing a state before being introduced into the vacuum heating furnace of the first embodiment.
FIG. 3 is a side sectional view illustrating a first embodiment.
FIG. 4 is an exploded perspective view illustrating a second embodiment.
FIG. 5 is an explanatory side sectional view showing a state before being introduced into the vacuum heating furnace of the second embodiment.
FIG. 6 is an explanatory perspective view of a bottom member 6 of a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Upper casing 3 Lower casing 4 Vent hole 5 Outer cylinder 6 Bottom member 7 Brazing material 8 Side 9 Bottom
10 Container body
11 Covered strip
12 Vent
13 Brazing material
14 Vacuum layer
15 Blocking part

Claims (6)

上部開口部の周縁に外方へ突出する上鍔部を、また、下部開口部の周縁に外方へ突出し通気孔を適宜穿設した下鍔部を夫々形成した無底の内筒体と、この内筒体の外側に被嵌可能で該被嵌状態において上部開口部の周縁及び下部開口部の周縁が夫々前記内筒体の上鍔部及び下鍔部と当接若しくは近接する無底の外筒体と、前記内筒体の下鍔部の下面に当接可能で該当接状態において前記通気孔を閉塞する構成の底部材とを設け、前記内筒体の外側に前記外筒体を被嵌して該内筒体の上鍔部及び下鍔部と,該外筒体の上部開口部の周縁及び下部開口部の周縁とを夫々連設し、続いて、内筒体の下鍔部の外面側にロウ付材を介して前記底部材を配設し、続いて、この内筒体と外筒体と底部材とを真空加熱炉に配設し前記ロウ付材を熔融せしめて真空封止することで内筒体と外筒体との間を真空層とし側部が真空断熱二層構造であり底部が一層構造の容器体を製造することを特徴とする容器体の製造方法。A bottomless inner cylindrical body formed with an upper collar part projecting outward at the periphery of the upper opening part, and a lower collar part projecting outward at the periphery of the lower opening part and appropriately drilled with a vent hole; It is possible to fit on the outer side of the inner cylinder, and in the fitted state, the peripheral edge of the upper opening and the lower edge of the lower opening are in contact with or close to the upper and lower collars of the inner cylinder, respectively. An outer cylindrical body and a bottom member configured to be able to contact the lower surface of the lower collar portion of the inner cylindrical body and close the vent hole in a corresponding contact state are provided, and the outer cylindrical body is disposed outside the inner cylindrical body. The upper tubular portion and the lower tubular portion of the inner cylindrical body and the peripheral edge of the upper opening portion and the peripheral edge of the lower opening portion of the outer cylindrical body are continuously provided, respectively, The bottom member is disposed on the outer surface side of the part via a brazing material, and then the inner cylinder, the outer cylinder, and the bottom member are disposed in a vacuum heating furnace to melt the brazing material. true Method for producing a container body, characterized in that to produce the side and vacuum layer container body is bottom-layer structure is vacuum insulated double-layered structure between the inner cylinder and the outer cylinder by sealing. 請求項1記載の容器体の製造方法において、ロウ付材を通気孔の周囲に配設することを特徴とする容器体の製造方法。2. The method for manufacturing a container body according to claim 1, wherein a brazing material is disposed around the vent hole. 請求項1,2いずれか1項に記載の容器体の製造方法において、内筒体の下鍔部の外面側にロウ付材を介して前記底部材を配設する際、内筒体の下鍔部が上方に位置する状態とし、この下鍔部の上面側にロウ付材を介して前記底部材を配設することを特徴とする容器体の製造方法。The method for manufacturing a container body according to any one of claims 1 and 2, wherein the bottom member is disposed on the outer surface side of the lower collar portion of the inner cylinder body via a brazing material. A method for manufacturing a container body, characterized in that the flange portion is positioned upward and the bottom member is disposed on the upper surface side of the lower flange portion via a brazing material. 請求項1〜3いずれか1項に記載の容器体の製造方法において、底部材の周縁部には、外筒体の外側面に当接する被嵌条が繞設されていることを特徴とする容器体の製造方法。The method for manufacturing a container body according to any one of claims 1 to 3, wherein a fitting strip that comes into contact with an outer surface of the outer cylindrical body is provided on a peripheral portion of the bottom member. A method for manufacturing a container body. 上部開口部の周縁に外方へ突出する上鍔部を、また、下部開口部の周縁に外方へ突出する下鍔部を夫々形成した無底の内筒体と、この内筒体の外側に被嵌可能で該被嵌状態において上部開口部の周縁及び下部開口部の周縁が夫々前記内筒体の上鍔部及び下鍔部と当接若しくは近接し且つ下部開口部の周縁に通気孔を適宜穿設した無底の外筒体と、前記内筒体の下鍔部の下面に当接可能で且つ該当接状態において前記外筒体の外側面に当接し前記通気孔を閉塞する被嵌条が繞設された底部材とを設け、前記内筒体の外側に前記外筒体を被嵌して該内筒体の上鍔部と,該外筒体の上部開口部の周縁とを夫々連設し、続いて、内筒体の下鍔部の下面に前記底部材を配設して該底部材の被嵌条により前記通気孔を覆い且つこの底部材の被嵌条と外筒体の外面との間にロウ付材を配設し、続いて、この内筒体と外筒体と底部材とを真空加熱炉に配設し前記ロウ付材を熔融せしめて真空封止することで内筒体の下鍔部と外筒体の下部開口部の周縁と底部材の被嵌条とを接合し且つ内筒体と外筒体との間を真空層とし側部が真空断熱二層構造であり底部が一層構造の容器体を製造することを特徴とする容器体の製造方法。A bottomless inner cylinder formed with an upper collar projecting outward on the periphery of the upper opening and a lower collar projecting outward on the periphery of the lower opening, and the outside of the inner cylinder In the fitted state, the peripheral edge of the upper opening and the peripheral edge of the lower opening are in contact with or close to the upper collar part and the lower collar part of the inner cylindrical body, respectively, and a vent hole is formed in the peripheral edge of the lower opening part. A bottomless outer cylindrical body appropriately drilled, and a cover that can be in contact with the lower surface of the lower collar portion of the inner cylindrical body and that is in contact with the outer surface of the outer cylindrical body in a corresponding contact state. A bottom member provided with a fitting line, and the outer cylinder is fitted on the outer side of the inner cylinder so that the upper collar of the inner cylinder, and the peripheral edge of the upper opening of the outer cylinder, Subsequently, the bottom member is disposed on the lower surface of the lower collar portion of the inner cylindrical body, and the vent hole is covered by the fitting member of the bottom member, and the fitting member of the bottom member and the outer member are externally attached. Cylinder A brazing material is disposed between the outer surface and the inner cylindrical body, the outer cylindrical body, and the bottom member are disposed in a vacuum heating furnace, and the brazing material is melted and vacuum sealed. The lower flange of the inner cylinder, the peripheral edge of the lower opening of the outer cylinder, and the fitting strip of the bottom member are joined, and a vacuum layer is formed between the inner cylinder and the outer cylinder, and the side part is a vacuum heat insulating double layer. A manufacturing method of a container having a structure and a bottom having a single layer structure. 上部開口部の周縁に外方へ突出する上鍔部を、また、下部開口部の周縁に外方へ突出する下鍔部を夫々形成した無底の内筒体と、この内筒体の外側に被嵌可能で該被嵌状態において上部開口部の周縁及び下部開口部の周縁が夫々前記内筒体の上鍔部及び下鍔部と当接若しくは近接し且つ下部開口部の周縁に通気孔を適宜穿設した無底の外筒体と、前記内筒体の下鍔部の下面に当接可能で且つ該当接状態において前記通気孔を閉塞する閉塞部が設けられた底部材とを設け、前記内筒体の外側に前記外筒体を被嵌して該内筒体の上鍔部及び下鍔部と,該外筒体の上部開口部の周縁及び下部開口部の周縁とを夫々連設し、続いて、内筒体の下鍔部の下面に前記底部材を配設して該底部材の閉塞部により前記通気孔を覆い且つこの閉塞部と外筒体の外側面との間にロウ付材を配設し、続いて、この内筒体と外筒体と底部材とを真空加熱炉に配設し前記ロウ付材を熔融せしめて真空封止することで内筒体と外筒体との間を真空層とし側部が真空断熱二層構造であり底部が一層構造の容器体を製造することを特徴とする容器体の製造方法。A bottomless inner cylinder formed with an upper collar projecting outward on the periphery of the upper opening and a lower collar projecting outward on the periphery of the lower opening, and the outside of the inner cylinder In the fitted state, the peripheral edge of the upper opening and the peripheral edge of the lower opening are in contact with or close to the upper collar part and the lower collar part of the inner cylindrical body, respectively, and a vent hole is formed in the peripheral edge of the lower opening part. And a bottom member provided with a closing portion capable of contacting the lower surface of the lower collar portion of the inner cylinder and closing the vent hole in the corresponding contact state. The outer cylinder is fitted on the outer side of the inner cylinder, and the upper and lower collars of the inner cylinder, and the periphery of the upper opening and the lower opening of the outer cylinder, respectively. Subsequently, the bottom member is disposed on the lower surface of the lower collar portion of the inner cylindrical body, and the vent hole is covered by the closed portion of the bottom member, and the closed portion and the outer cylindrical body are externally attached. A brazing material is disposed between the inner cylindrical body, the outer cylindrical body, and the bottom member in a vacuum heating furnace, and the brazing material is melted and vacuum sealed. A container body manufacturing method comprising manufacturing a container body having a vacuum layer between an inner cylinder body and an outer cylinder body, a side portion having a vacuum heat insulating two-layer structure, and a bottom portion having a single layer structure.
JP2001367271A 2001-11-30 2001-11-30 Container body manufacturing method Expired - Fee Related JP3916937B2 (en)

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