JP3698428B2 - Cold storage container - Google Patents

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JP3698428B2
JP3698428B2 JP2002172859A JP2002172859A JP3698428B2 JP 3698428 B2 JP3698428 B2 JP 3698428B2 JP 2002172859 A JP2002172859 A JP 2002172859A JP 2002172859 A JP2002172859 A JP 2002172859A JP 3698428 B2 JP3698428 B2 JP 3698428B2
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JP2003192047A (en
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和宏 坂本
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Description

【0001】
【発明の属する技術分野】
本発明は、板紙材にて形成された箱本体および蓋体を備えた保冷性収容箱に関する。
【0002】
【従来の技術】
従来、この種の保冷性収容箱は、いわゆる発泡スチロールにて形成された箱本体および蓋体を備えている。
【0003】
そして、この保冷性収容箱は、箱本体にたとえば魚類などの被収容物を収容し、蓋体を箱本体に被嵌して輸送、あるいは出荷などする。
【0004】
【発明が解決しようとする課題】
しかしながら、上述の保冷性収容箱では、発泡スチロールを適切に処理しないと、環境に好ましくない影響を与えるガスなどを発生するおそれがあるため、使用済み後の廃棄処理が容易でない。
【0005】
そこで、廃棄処理の容易な厚板紙材にて箱本体および蓋体を形成することが考えられるが、一般的な厚板紙材は、発泡スチロール製の収容箱に比べて保冷性の面で不利であるという問題点を有している。
【0006】
本発明はこのような点に鑑みなされたもので、使用済み後の廃棄が容易であり、かつ保冷性の良好な保冷性収容箱を提供することを目的とする。
【0007】
【課題を解決するための手段】
請求項1記載の保冷性収容箱は、板紙材にて上面を開口して形成された箱本体と、板紙材にて形成され前記箱本体に着脱可能に被嵌されてこの箱本体の開口上面を閉塞する蓋体と、この蓋体を前記箱本体に被嵌させた状態でこの蓋体および前記箱本体にて挟持されてこの箱本体の開口上面を閉塞する軟質シートと、板紙材にて形成され、前記蓋体の内側上面および前記軟質シートの前記蓋体側の少なくともいずれか一方に取り付けられた突出体とを具備し、前記軟質シートは、柔軟性を有する紙材を積層して形成され、前記蓋体の前記箱本体への被嵌により少なくとも前記蓋体の内側上面および前記箱本体の開口上面縁部と、前記突出体の側部および前記箱本体の内側面とで挟持されてこの箱本体の内部を気密に保つものである。
【0008】
そして、板紙材にて箱本体、蓋体および突出体を形成したことにより使用済み後の廃棄処理が容易になる。また、箱本体を板紙材にて上面を開口して形成し、箱本体に着脱可能に被嵌されてこの箱本体の開口上面を閉塞する蓋体を板紙材にて形成し、この蓋体および箱本体にて挟持される軟質シートの蓋体側および蓋体の内側上面の少なくともいずれか一方に板紙材にて形成した突出体を取り付け、蓋体の箱本体への被嵌により蓋体の内側上面および箱本体の開口上面縁部と、突出体の側部および箱本体の内側面とで軟質シートを挟持してこの箱本体の内部を気密に保つ。この結果、箱本体の内側と外側とで互いに熱が伝わりにくく、箱本体内部の温度が維持されるので、保冷性が良好になる。また、軟質シートを、柔軟性を有する紙材を積層して形成したことにより、この軟質シートを箱本体および嵌合溝にて挟持することでこの軟質シートが圧縮されて気密性が向上し箱本体の気密性をより高度に維持する。
【0009】
請求項2記載の保冷性収容箱は、請求項1記載の保冷性収容箱において、突出体は、板紙材を折りたたんで形成されたものである。
【0010】
そして、突出体を、板紙材を折りたたんで形成することにより、箱本体と蓋体とを嵌合させた際に形成される、箱本体の内部と外気との間の複雑な形状の通気路をこの板紙材にて、より容易かつ確実に形成する。
【0011】
請求項3記載の保冷性収容箱は、板紙材にて上面を開口して形成された箱本体と、板紙材にて形成され、前記箱本体の開口上面縁部に嵌合する嵌合溝を内側面部に沿って設け、かつ前記箱本体に着脱可能に被嵌されてこの箱本体の開口上面を閉塞する蓋体と、柔軟性を有する紙材を積層して形成され、前記蓋体を前記箱本体に被嵌させた状態でこの蓋体および前記箱本体にて前記嵌合溝で挟持されてこの箱本体の開口上面を閉塞しこの箱本体内部を気密に保つ軟質シートとを具備したものである。
【0012】
そして、板紙材にて箱本体および蓋体を形成したことにより使用済み後の廃棄処理が容易になる。また、箱本体内部を気密に保つ軟質シートを、蓋体と箱本体とで嵌合溝にて挟持することにより、箱本体内部と外気との間に形成される通気路が複雑な形状に形成されて箱本体の内部を気密に保つため、箱本体の内側と外側とで互いに熱が伝わりにくく、箱本体内部の温度が維持されるので、保冷性が良好になる。また、軟質シートを、柔軟性を有する紙材を積層して形成したことにより、この軟質シートを箱本体および嵌合溝にて挟持することでこの軟質シートが圧縮されて気密性が向上し箱本体の気密性をより高度に維持する。
【0013】
請求項4記載の保冷性収容箱は、請求項1ないし3いずれか一記載の保冷性収容箱において、箱本体は、略矩形状に形成され、この箱本体の少なくとも相対する一対の側部は、底面部の相対する一対の辺縁からそれぞれ折り曲げて形成された外面板部、およびこの外面板部の上端縁から前記箱本体の内側に折り曲げられ前記外面板部に空隙を介して対向する内面板部にて形成され、これら内面板部は、これら内面板部と前記外面板部との間の空隙に連通する冷気流入孔をそれぞれ有したものである。
【0014】
そして、箱本体を略矩形状に形成し、この箱本体の少なくとも相対する一対の側部を、底面部の相対する一対の辺縁からそれぞれ折り曲げて形成された外面板部、およびこれら外面板部の上端縁から箱本体の内側に折り曲げられ外面板部に空隙を介して対向する内面板部にて形成し、これら内面板部に、これら内面板部および外面板部の間の空隙に連通する冷気流入孔を形成する。この結果、たとえば収容物を収容した状態で冷蔵すると、冷気が冷気流通孔から内面板部および外面板部の間の空隙に流入して断熱層となり、箱本体の外部からの熱を遮断して、箱本体内の温度上昇を抑制する。
【0015】
請求項5記載の保冷性収容箱は、請求項4記載の保冷性収容箱において、内面板部は、これら内面板部の先端側の下端縁から箱本体の内方に折り曲げられてこの箱本体の底面部に重合する先端折曲部を有し、前記内面板部の各先端折曲部の上側に亘って前記箱本体の底面部に対向して載置される略矩形平板状の底板を具備したものである。
【0016】
そして、内面板部の下端縁に箱本体の内方に折り曲げられてこの箱本体の底面部に重合する先端折曲部を設け、これら先端折曲部の上側に亘って箱本体の底面部に対向して略矩形平板状の底板を載置することにより、この底面部および底板の間に空隙が形成されるため、たとえば収容物を収容した状態で冷蔵すると、この空隙内の空気が冷却されて断熱層となり、箱本体の外部からの熱を遮断して、箱本体内の温度上昇をより抑制する。
【0017】
請求項6記載の保冷性収容箱は、請求項5記載の保冷性収容箱において、内面板部は、先端折曲部の箱本体の内方への折り曲げにより冷気流入孔が形成されるように前記先端折曲部に連続して切込部が形成されたものである。
【0018】
そして、先端折曲部の箱本体の内方への折り曲げにより冷気流入孔が形成されるように、内面板部に先端折曲部に連続して切込部を形成することにより、先端折曲部を折り曲げるだけで冷気流入孔を切込部から容易に形成する
【0019】
請求項記載の保冷性収容箱は、請求項1ないしいずれか一記載の保冷性収容箱において、箱本体は、略矩形状に形成され、開口上面縁部の四隅の角部を形成する一方の側縁にこの角部を形成する他方の側縁が嵌合する段差部をそれぞれ備えたものである。
【0020】
そして、箱本体を略矩形状に形成し、この箱本体の開口上面縁部の四隅の角部を形成する一方の側縁にこの角部を形成する他方の側縁が嵌合する段差部をそれぞれ設けることにより、箱本体の四隅の角部にて一方の側縁に他方の側縁が段差部を介して嵌合するため、箱本体の外郭を必要以上に突出することなく形成する。
【0021】
【発明の実施の形態】
以下、本発明の保冷性収容箱の第1の実施の形態の構成を図1ないし図4を参照して説明する。
【0022】
図1および図2に示すように、1は箱本体であり、この箱本体1はたとえば耐水性ボール紙などの、たとえば厚さ寸法3mmほどの耐水性を有する板紙材2にて形成されている。この箱本体1は、略矩形状に形成された底面部3を有しており、この底面部3の各辺には、それぞれ箱本体1の外面板部としての略矩形状の外面側板部4a,4b,4c,4dが連接形成されている。これら外面側板部4a,4b,4c,4dと底面部3との連接部には、折り目5a,5b,5c,5dがそれぞれ形成されており、これら外面側板部4a,4b,4c,4dは、これら折り目5a,5b,5c,5dから折り曲げて形成されている。
【0023】
また、外面側板部4a,4bは、略正方形状の連結部10aにて一体となっている。同様に、外面側板部4b,4c、外面側板部4c,4d、および外面側板部4d,4aは、略正方形状の連結部10b,10c,10dにてそれぞれ互いに一体となっている。そして、連結部10aと外面側板部4a,4bとの連接部には折り目11a,11bがそれぞれ形成されている。同様に、連結部10bと外面側板部4b,4cとの連接部には折り目11c,11d、連結部10cと外面側板部4c,4dとの連接部には折り目11e,11f、および連結部10dと外面側板部4d,4aとの連接部には折り目11g,11hがそれぞれ形成されている。
【0024】
さらに、各連結部10a,10b,10c,10dの外側の角には、たとえば略正方形状の切欠部12a,12b,12c,12dがそれぞれ設けられている。そして、各連結部10a,10b,10c,10dには、各切欠部12a,12b,12c,12dと、これら切欠部12a,12b,12c,12dに対向する各連結部10a,10b,10c,10dの角とを結ぶ対角線に沿って、それぞれ折り目13a,13b,13c,13dが形成されている。
【0025】
また、外面側板部4aの外側辺である先端側、すなわち箱本体1を組み立てた際の上端縁には、略矩形状の上縁板部14aを介して、内面板部としての略矩形状の内面側板部15aが連接形成されている。この上縁板部14aは、外面側板部4aと略等しい長手寸法を有して形成されている。さらに、内面側板部15aは、上縁板部14aよりもやや小さい長手寸法を有している。そして、これら外面側板部4aおよび内面側板部15aにて箱本体1の側部としての端板16aが形成されている。また、内面側板部15aの長手方向、すなわち箱本体1の幅方向には、それぞれ略矩形状の挿入突片17a,17bが連接形成されている。そして、外面側板部4aと上縁板部14aとの連接部には、折り目18aが形成され、上縁板部14aと内面側板部15aとの連接部には、折り目19aが形成されている。
【0026】
一方、外面側板部4bの外側辺である先端側、すなわち箱本体1を組み立てた際の上端縁には、略矩形状の上縁板部14bを介して、内面板部としての略矩形状の内面側板部15bが連接形成されている。この上縁板部14bは、外面側板部4bよりもやや小さい長手寸法を有し、内面側板部15bは、外面側板部4bと略等しい長手寸法を有している。そして、これら外面側板部4bおよび内面側板部15bにて箱本体1の側部としての側板16bが形成されている。また、外面側板部4bと上縁板部14bとの連接部には、折り目18bが形成されており、上縁板部14bと内面側板部15bとの連接部には、折り目19bが形成されている。さらに、内面側板部15aの長手方向、すなわち箱本体1の長手方向には、それぞれ略矩形状の支持側板部20a,20bが連接形成されている。これら支持側板部20a,20bと内面側板部15bとの連接部には、切込部21a,21bおよび折り目22a,22bがそれぞれ設けられている。これら切込部21a,21bは、内面側板部15bの外側辺からたとえば40mmほど切り込み形成され、これら切込部21a,21bの終端部は、それぞれ支持側板部20a,20bに向けてたとえば5mmほど切り込み形成されている。さらに、折り目22a,22bは、切込部21a,21bの終端部から内面側板部15bの幅方向に沿って、切込部21a,21bと反対の方向に設けられている。
【0027】
そして、外面側板部4cの外側辺である先端側、すなわち箱本体1を組み立てた際の上端縁には、外面側板部4aと同様に、略矩形状の上縁板部14cを介して内面板部としての略矩形状の内面側板部15cが連接形成されており、これら外面側板部4cおよび内面側板部15cにて箱本体1の側部としての端板16cが形成されている。また、内面側板部15cには、それぞれ挿入突片17c,17dが連接形成されている。さらに、外面側板部4cと上縁板部14cとの連接部には折り目18cが形成され、上縁板部14cと内面側板部15cとの連接部には折り目19cが形成されている。そして、外面側板部4dの外側辺である先端側、すなわち箱本体1を組み立てた際の上端縁には、外面側板部4bと同様に略矩形状の上縁板部14dを介して内面板部としての略矩形状の内面側板部15dが連接形成されており、これら外面側板部4dおよび内面側板部15dにて箱本体1の側部としての側板16dが形成されている。また、外面側板部4dと上縁板部14dとの連接部には折り目18dが形成され、上縁板部14dと内面側板部15dとの連接部には折り目19dが形成されている。さらに、内面側板部15dには、支持側板部20c,20dが連接形成されている。また、各支持側板部20c,20dと内面側板部15dとの連接部には、切込部21c,21dと、折り目22c,22dとが形成されている。
【0028】
さらに、各上縁板部14a,14b,14c,14dにて開口上面縁部23が形成される。また、この開口上面縁部23の四隅の角部には、それぞれ上縁板部14bと外面側板部4bとの長手寸法差、および上縁板部14dと外面側板部4dとの長手寸法差にて、それぞれこれら上縁板部14b,14dの長手方向の両端部に段差部24a,24b,24c,24dが形成される。これら段差部24a,24b,24c,24dを介して、開口上面縁部23の角部を形成する外面側板部4a,4b、外面側板部4b,4c、外面側板部4c,4d、および外面側板部4d,4aがそれぞれ嵌合し、箱本体1の外郭、すなわちこの箱本体1の長手方向および幅方向に必要以上に突出しないで形成される。そして、箱本体1の底面部3には、箱本体1と同じ板紙材2にて略矩形状に形成された底板としての身板25が載置される。この身板25は、たとえば底面部3よりも内面側板部15a,15b,15c,15dの厚さ寸法分小さく形成されている。
【0029】
また、26は箱本体1に着脱可能に被嵌されてこの箱本体1の開口上面を閉塞する蓋体であり、この蓋体26は箱本体1と同等の耐水性を有する板紙材27にて箱本体1と略同形に形成されている。すなわち、この蓋体26は、箱本体1の端板16a,16cおよび側板16b,16dに対応して板紙材27を内方に折り返してそれぞれ形成した端板28a,28cおよび側板28b,28dを有している。そして、これら端板28a,28cおよび側板28b,28dの内面は、それぞれ内側面部30a,30b,30c,30dとなっている。また、この蓋体26の内側上面である上面部31が底面部3よりも平面視でやや大きい略矩形状に形成されている。さらに、上面部31の略中心域には、略矩形状の突出基端部32が接着して取り付けられている。この突出基端部32は、板紙材27よりも若干厚い板紙材33にて形成されている。また、この突出基端部32の長手方向および幅方向は、上面部31の長手方向および幅方向に略沿っている。
【0030】
さらに、この突出基端部32の幅方向の両端には、それぞれ組立部32a,32bが連接形成されている。組立部32aは、突出基端部32の長手寸法と略等しい長手寸法を有している。そして、この組立部32aの幅方向の外側辺の略中心域には、略円形状の組立凸部34が連接形成されている。一方、組立部32bは、組立部32aと略等しい寸法に形成されているが、幅方向の外側辺の略中心域には、たとえば半径40mmの略円形状の組立凹部35が内側に切り欠き形成されている。さらに、突出基端部32と組立部32a,32bの連接部には、それぞれ折り目36a,36bが形成されている。そして、これら折り目36a,36bに沿って組立部32a,32bを折りたたむとともに組立凸部34を組立凹部35に嵌合させることにより、突出体37が形成される。
【0031】
また、40は軟質シートであり、この軟質シート40は、たとえばポリエチレン(polyethylene)などにて表側面41aをラミネート加工されたクラフト紙41と、このクラフト紙41の裏側面41bに重ねられた複数、たとえば2枚のティッシュ紙42とで構成された、いわゆるワッティング紙である。この軟質シート40は、平面視で箱本体1よりも大きい略矩形状に形成されている。さらに、ティッシュ紙42は、たとえば接着剤などにてクラフト紙41の裏側面41bに接着固定されている。
【0032】
次に、上記第1の実施の形態の作用を説明する。
【0033】
まず、箱本体1を組み立てる場合には、折り目13a,13bに沿って連結部10a,10bを箱本体1の内側に起こして折りたたみつつ、折り目5bに沿って外面側板部4bを底面部3に対して略直角に起こして折り曲げる。
【0034】
次いで、内面側板部15bを箱本体1の内側に向けて折り目18bおよび折り目19bから折り曲げ、上縁板部14bにて開口上面縁部23の一部を形成しつつ、この内面側板部15bと外面側板部4bとを合わせる。このとき、上縁板部14bの長手方向の両端には、外面側板部4bとの長手寸法差により段差部24a,24bが形成される。
【0035】
また、支持側板部20a,20bを折り目22a,22bに沿って箱本体1の内側に向けて折り曲げ、折りたたんだ連結部10a,10bにそれぞれ沿わせて折り目5a上にそれぞれ位置させる。
【0036】
同様に、折り目13c,13dに沿って連結部10c,10dを折りたたみつつ、折り目5dに沿って外面側板部4dを底面部3に対して略直角に折り曲げる。さらに、内面側板部15dを折り目18dおよび折り目19dから折り曲げて上縁板部14dにて開口上面縁部23の一部を形成し、内面側板部15dが箱本体1の内側面になるようにこの内面側板部15dと外面側板部4dとを重合する。このとき、上縁板部14dの長手方向の両端には、外面側板部4bとの長手寸法差により段差部24c,24dが形成される。また、支持側板部20c,20dを折り目22c,22dに沿って箱本体1の内側に向けて折り曲げ、折りたたんだ連結部10c,10dにそれぞれ沿わせて折り目5c上にそれぞれ位置させる。
【0037】
さらに、外面側板部4aを、折り目5aから底面部3および外面側板部4b,4dに対して略直角になるように起こして折り曲げる。
【0038】
次いで、内面側板部15aを箱本体1の内側に向けて、折り目18aおよび折り目19aから折り曲げつつ、連結部10a,10dおよび支持側板部20a,20dをこの内面側板部15aと外面側板部4aとで挟み込みながらこの内面側板部15aを外面側板部4aに重合させる。このとき、上縁板部14aの長手方向の両端が上縁板部14aの両端が段差部24a,24dに嵌合する。
【0039】
同様に、内面側板部15cを箱本体1の内側に向けて折り目5cに沿って折り曲げつつ、連結部10b,10dおよび支持側板部20b,20cをこの内面側板部15cと外面側板部4cとで挟み込みながら、この内面側板部15cを外面側板部4cに重合させる。
【0040】
そして、挿入突片17a,17bをそれぞれ切込部21d,21aに、また挿入突片17c,17dをそれぞれ切込部21b,21cに挿入して、上面を開口した箱本体1を形成して組み立てた後、底面部3上に身板25を載置する。
【0041】
同様に、蓋体26を組み立てた後、箱本体1の内部に冷蔵の必要な生鮮類、たとえば魚類などの被収容物を収容してこの箱本体1の開口上面に軟質シート40を載置しこの開口上面を閉塞する。このとき、軟質シート40は、ティッシュ紙42を箱本体1の内側に向け、箱本体1の長手方向に軟質シート40の長手方向を略沿わせて載置する。
【0042】
さらに、箱本体1に軟質シート40を載置した状態で蓋体26を箱本体1に被嵌する。
【0043】
このとき、図4に示すように、軟質シート40の略中心域は、突出体37にて箱本体1の底面部3に向けて鉛直下方向に押し込まれつつ、突出体37の外周に沿ってくぼみ、突出体37の側部と箱本体1の各内面側板部15a,15b,15c,15dとで挟持される。
【0044】
また、軟質シート40は、開口上面縁部23の上側で、この開口上面縁部23と上面部31とで挟持され、余剰部分51が、箱本体1の外面側板部4a,4b,4c,4dおよび蓋体26の内側面部30a,30b,30c,30dにて挟持される。これにより、通気路52が断面視で略凹字状の複雑な形状に形成される。
【0045】
そして、この状態で箱本体1、蓋体26および軟質シート40を、たとえば冷蔵庫などに収納して冷蔵する。
【0046】
さらに、使用済み後には、箱本体1および蓋体26を焼却などにて廃棄する。
【0047】
この結果、通気路52の複雑な形状および軟質シート40により、箱本体1の内部の気密性が保たれるため、箱本体1の内側と外側とで互いに熱が伝わりにくく、冷蔵庫などから箱本体1、蓋体26および軟質シート40を取り出した後も箱本体1の内部を保冷できるので、保冷性を向上できる。
【0048】
また、これら箱本体1および蓋体26を板紙材2にてそれぞれ形成したことにより、使用済み後に焼却などにて容易に廃棄できる。
【0049】
さらに、軟質シート40は表側面がラミネート加工されたクラフト紙41により通気が遮断されるとともに、クラフト紙41の裏側面41bに重ねられたティッシュ紙42が箱本体1と蓋体26とに挟持されて圧縮され気密性が向上することにより、箱本体1の気密性をより高度に維持できる。
【0050】
そして、ティッシュ紙42は、箱本体1内に収容した生鮮類などの被収容物から蒸発した水分などを吸収することにより、より気密性が向上するため、箱本体1の気密性をより高度に維持できる。
【0051】
加えて、突出体37は、板紙材33を折りたたむだけで容易に形成できるとともに、蓋体26を組み立てる前は、同じ厚さの突出体37を一枚の板紙材33にて形成する場合に比べて荷姿を略半分にできる。
【0052】
さらに、組立部32aの幅方向の外側辺の略中心域に、組立凸部34を連接形成し、組立部32bの幅方向の外側辺の略中心域に、組立凹部35を切り欠き形成したことにより、これら組立部32a,32bを折りたたんだ際にこれら組立凸部34を組立凹部35に嵌合させることでこれら組立部32a,32bが外れにくくなるため、より確実に突出体37を形成できる。
【0053】
そして、突出体37を、蓋体26の上面部31に取り付けたことにより、蓋体26を箱本体1に被嵌する際にこの突出体37の箱本体1および蓋体26に対する位置が固定されているため、箱本体1および蓋体26にて軟質シート40を容易かつ確実に挟持できる。
【0054】
また、段差部24a,24b,24c,24dが形成されることにより、外面側板部4a,4b,4c,4dが互いにより深く嵌合するため、箱本体1を、この箱本体1の外郭、すなわち長手方向および幅方向について必要以上に突出することなく組み立てできる。
【0055】
さらに、板紙材33は、箱本体1の板紙材2および蓋体26の板紙材27よりも厚さ寸法が大きいため、突出体37の側部にて軟質シート40をより確実に挟持できる。
【0056】
なお、上記第1の実施の形態において、蓋体26には、図5に示すように、突出体37の代わりに内側面部30a,30b,30c,30dに沿って上面部31に嵌合溝53を形成し、この嵌合溝53と箱本体1とで軟質シート40を挟持してもよい。
【0057】
また、突出体37は、軟質シート40の表面、すなわちクラフト紙41の上側に接着して取り付けてもよい。この場合には、この突出体37を箱本体1の開口上面縁部23に対して位置決めした状態に予め軟質シート40を載置できるため、この軟質シート40を箱本体1および蓋体26に対して、より容易に位置決めできる。
【0058】
さらに、組立凸部34および組立凹部35は、それぞれ互いに確実に嵌合できれば、たとえば矩形状などに形成してもよく、形状を限定されるものではない。
【0059】
次に、本発明の保冷性収容箱の第2の実施の形態を図6および図7を参照して説明する。
【0060】
この図6および図7に示す実施の形態は、図1ないし図4に示す実施の形態と基本的に同様の構成を有しているが、突出体37は、板紙材33にて形成され、軟質シート40のクラフト紙41の表側面41a側にたとえば接着剤などにて接着固定されている。
【0061】
さらに、箱本体1の内面側板部15b,15dの外側辺である先端側、すなわち箱本体1を組み立てた際の下端縁には、折り目60a,60bを介して先端折曲部61a,61bがこれら内面側板部15b,15dから延在して形成されている。これら折り目60a,60bは、内面側板部15bの長手方向に沿って形成されており、先端折曲部61a,61bは、箱本体1の内方に向けて内面側板部15b,15dに対して略垂直に折り目60a,60bから折り曲げられて底面部3に重合される。
【0062】
また、折り目60a,60bの内面側板部15b,15d側には、これら折り目60a,60bに沿って複数、たとえば3つ、略矩形状の切込部62がそれぞれ互いに略等間隔に離間されて先端折曲部61a,61bと連続して形成されている。このため、先端折曲部61a,61bを箱本体1の内方に向けて折り目60a,60bからそれぞれ折り曲げた際に、これら切込部62に沿って内面側板部15b,15dが外面側板部4b,4d方向へと切り起こされて、冷気流入孔63が形成される。これら冷気流入孔63は、内面側板部15b,15dおよび外面側板部4b,4dの間の空隙64に連通しており、箱本体1に収容物を収容した状態で冷蔵した際に冷気がこれら冷気流入孔63を介して内面側板部15b,15dおよび外面側板部4b,4dの間の空隙64に流入し、この空隙64に冷気による断熱層を形成する。
【0063】
さらに、先端折曲部61a,61bにおける箱本体1の内方に折り曲げた部分の上側には、底板としての身板65が底面部3に対向して載置される。このため、身板65の下面と箱本体1の底面部3との間に先端折曲部61a,61bの厚さ、すなわち箱本体1を形成した板紙材2の厚さ分の空隙66が形成される。この結果、箱本体1に収容物を収容した状態で冷蔵した際に、この空隙66に冷気による断熱層が形成される。
【0064】
また、蓋体26の側板28b,28dは、板紙材27を折り返さずに形成されている。
【0065】
そして、上記第1の実施の形態と同様に箱本体1を組み立てる。すなわち、折り目13a,13b,13c,13dに沿って連結部10a,10b,10c,10dをそれぞれ折りたたみつつ、折り目5b,5dに沿って外面側板部4b,4dを起こして折り曲げ、内面側板部15b,15dを折り目18b,18dおよび折り目19b,19dからそれぞれ折り曲げ、上縁板部14b,14dにて開口上面縁部23の一部を形成してこれら内面側板部15b,15dと外面側板部4b,4dとを重合させる。このとき、上縁板部14b,14dの幅寸法とこれら内面側板部15b,15dおよび外面側板部4b,4dの厚さ寸法との寸法差により、これら内面側板部15b,15dおよび外面側板部4b,4dの間に空隙64が形成される。
【0066】
この後、折り目60a,60bに沿って先端折曲部61a,61bを箱本体1の内方に向けて内面側板部15b,15dから折り曲げて底面部3に重合させると、内面側板部15b,15dが切込部62から外面側板部4b,4d側に切り起こされて冷気流入孔63が形成される。
【0067】
さらに、支持側板部20a,20b,20c,20dをそれぞれ折り目22a,22b,22c,22dに沿って折り曲げ、折りたたんだ連結部10a,10bにそれぞれ沿わせて折り目5a,5c上にそれぞれ位置させ、外面側板部4a,4cを、折り目5a,5cから底面部3および外面側板部4b,4dに対して略直角になるように起こして折り曲げた後、内面側板部15a,15cを折り目18aおよび折り目19aから折り曲げつつ、連結部10a,10dおよび支持側板部20a,20dを内面側板部15aと外面側板部4aとで挟み込み、連結部10b,10cおよび支持側板部20b,20cを内面側板部15cと外面側板部4cとで挟み込みながらこれら内面側板部15a,15b,15c,15dを外面側板部4a,4b,4c,4dに重合させる。
【0068】
次いで、挿入突片17a,17bをそれぞれ切込部21d,21aに挿入するとともに、挿入突片17c,17dをそれぞれ切込部21b,21cに挿入して、上面を開口した箱本体1を組み立てる。
【0069】
この後、身板65を先端折曲部61a,61b上に亘って底面部3に対向させて載置する。
【0070】
そして、この箱本体1内に生鮮類などの被収容物を収容した状態で、突出体37を上側にした軟質シート40をこの生鮮類などの被収容物の上側に載置し、突出体37を箱本体1内に少し押し込んだ後蓋体26をこの箱本体1に被嵌して、図7に示すように突出体37の側部と箱本体1の各内面側板部15a,15b,15c,15d、蓋体26の上面部31と箱本体1の開口上面縁部23、および箱本体1の外面側板部4a,4b,4c,4dと蓋体26の内側面部30a,30b,30c,30dでそれぞれ軟質シート40を挟持すると、通気路52が断面視で略凹字状の複雑な形状に形成される。
【0071】
この後、箱本体1、蓋体26および軟質シート40を、たとえば冷蔵庫などに収納して冷蔵すると、冷却された箱本体1内の空気が箱本体1内の下側へと移動し、冷気流入孔63から内面側板部15b,15dと外面側板部4b,4dとの間の空隙64に流入して、この空隙64内に冷気による断熱層を形成して、箱本体1の外部からの熱が箱本体1の側板16b,16d側から箱本体1の内部へと伝達することを防止する。
【0072】
同時に、身板65と底面部3との間の空隙66内の空気も冷却されてこの空隙66内に冷気による断熱層を形成し、この断熱層にて箱本体1の外部からの熱が箱本体1の底面部3側から箱本体1の内部へと伝達することを防止する。
【0073】
上述したように、上記第2の実施の形態によれば、箱本体1、蓋体26を板紙材2,27などで形成し、ワッティング紙にて形成した軟質シート40をこれら箱本体1および蓋体26にて挟持するなど、図1ないし図4に示す実施の形態と同様の構成を有することにより、この図1ないし図4に示す実施の形態と同様の作用効果を奏することができる。
【0074】
また、箱本体1の側板16b,16dの内面側板部15b,15dに、これら内面側板部15b,15dおよび外面側板部4b,4dの間の空隙64に連通する冷気流入孔63を形成することにより、たとえば生鮮類などの被収容物を収容した状態で箱本体1などを冷蔵すると、箱本体1内の空気が冷却された冷気が冷気流入孔63から内面側板部15b,15dおよび外面側板部4b,4dの間の空隙64に流入して断熱層となり、箱本体1の外部からの熱を遮断するため、箱本体1内の温度上昇を抑制でき、保冷性をより向上できる。
【0075】
さらに、内面側板部15b,15dの先端側である下端縁に先端折曲部61a,61bをこれら内面側板部15b,15dと一体に形成し、これら先端折曲部61a,61bを箱本体1の内方に折り曲げてこの箱本体1の底面部3に重合した後、これら先端折曲部61a,61bの上側に亘って箱本体1の底面部3に対向して略矩形平板状の身板65を載置する。この結果、底面部3および身板25の間に板紙材2の厚さ分の空隙66が形成されるため、たとえば生鮮類などの被収容物を収容した状態で冷蔵すると、この空隙66内の空気が冷却されて冷気による断熱層を形成するので、箱本体1の外部からの熱を遮断して、箱本体内の温度上昇をより抑制でき、保冷性をより向上できる。
【0076】
そして、冷気流入孔63は、先端折曲部61a,61bを箱本体1の内方に折り曲げた際に内面側板部15b,15dの一部がそれぞれ切込部62から外面側板部4b,4d方向に切り起こされることで形成されるため、先端折曲部61a,61bを折り曲げるだけで冷気流入孔63を容易に形成できる。
【0077】
また、冷気流入孔63を形成する際に、内面側板部15b,15dの一部を切込部62から外面側板部4b,4d方向に切り起こすことにより、この切り起こされた内面側板部15b,15dの一部が外面側板部4b,4dの内面側板部15b,15d側に当接してこれら外面側板部4b,4dを支持するため、側板16b,16dをより補強できる。
【0078】
さらに、冷気流入孔63を、側板16b,16dの内面側板部15b,15dに形成したため、より広い面積に亘って冷気による断熱層を形成できるので、保冷性をより向上できる。
【0079】
そして、冷気流入孔63を、箱本体1の下側に形成したことにより、冷却されたことにより重くなる冷気を空隙64へと、より容易に流入させることができる。
【0080】
また、蓋体26の側板28b,28dを、板紙材27を折り返さずに形成したことにより、蓋体26をより容易に組み立てできるとともに、蓋体26の幅寸法を小さくできる。
【0081】
なお、上記第2の実施の形態において、突出体37は、板紙材33を折りたたんで厚さをより大きくしてもよく、第1の実施の形態と同様に蓋体26の上面部31に接着剤などにて接着して取り付けてもよい。
【0082】
また、先端折曲部61a,61b、切込部62、および冷気流入孔63は、端板16a,16cの内面側板部15a,15cに形成してもよい。この場合にも、上記第2の実施の形態と同様の作用効果を奏することができる。
【0083】
さらに、先端折曲部61a,61b、切込部62、および冷気流入孔63は、内面側板部15a,15b,15c,15d全てに形成してもよい。この場合には、冷気による断熱層を箱本体1の周り全てに形成できるため、保冷性をより向上できる。
【0084】
そして、冷気流入孔63は、予め内面側板部15b,15dを貫通して設けられていてもよく、内面側板部15b,15dに先端折曲部61a,61bを設けず、冷気流入孔63のみを形成してもよい。この場合に、冷気流入孔63の位置は、内面側板部15b,15dの下側に限定されるものではない。
【0085】
また、箱本体1の底面部3側からの熱を遮断する必要がない場合には、身板65を箱本体1内に載置しなくてもよい。
【0086】
さらに、上記各実施の形態において、箱本体1、蓋体26および軟質シート40の大きさおよび形状は、収容する被収容物の大きさ、形状、あるいは量に応じて変更する。
【0087】
そして、軟質シート40は、箱本体1の内部を気密に保つことができれば、ワッティング紙でなくても良く、この軟質シート40の材質は、柔軟性を有する紙材を積層したものであれば、クラフト紙41、およびティッシュ紙42に限定されるものではない。
【0088】
また、クラフト紙41の表面は、ラミネート加工していなくてもよい。この場合は、使用済み後にこのクラフト紙41をより容易に廃棄できる。
【0089】
さらに、折り目18aないし折り目18d、折り目19aないし折り目19d、および蓋体26の内側面部30aないし内側面部30dの箱本体1側に対向した折り目などをミシン目にしてもよい。この場合には、箱本体1および蓋体26を、より容易に組み立てできる。
【0090】
【実施例】
図1に示す保冷性収容箱を用い、箱本体1内部の温度の時間変化を測定した。比較例の収容箱としては、一般的な発泡スチロールにて箱本体および蓋体を形成した比較例を用い、室温23℃の恒温室において、−20℃に冷却した500gの保冷材を2個ずつ、それぞれ実施例と比較例とに入れ、内部の温度を熱電対により測定した(北海道立工業試験場による測定、工試成績第13―666号)。この結果を図8に示す。
【0091】
この測定結果から、実施例の保冷性収容箱は、測定開始から10時間ほどの間は、ほとんど内部の温度が変化せず、測定開始から15時間ほどの間まで比較例よりも若干良好な保冷性を有しており、全体としては実施例と比較例との保冷性に大きな差異は生じなかった。
【0092】
この結果、実施例は使用済み後の処理が容易な板紙材にて形成しつつも発泡スチロールにて形成した比較例の保冷性収容箱と同様に良好な保冷性を有することが分かる。
【0093】
【発明の効果】
請求項1記載の保冷性収容箱によれば、板紙材にて箱本体、蓋体および突出体を形成したことにより使用済み後の廃棄処理を容易にできる。また、箱本体を板紙材にて上面を開口して形成し、箱本体に着脱可能に被嵌されてこの箱本体の開口上面を閉塞する蓋体を板紙材にて形成し、この蓋体および箱本体にて挟持される軟質シートの蓋体側および蓋体の内側上面の少なくともいずれか一方に板紙材にて形成した突出体を取り付け、蓋体の箱本体への被嵌により蓋体の内側上面および箱本体の開口上面縁部と、突出体の側部および箱本体の内側面とで軟質シートを挟持してこの箱本体の内部を気密に保つ。この結果、箱本体の内側と外側とで互いに熱が伝わりにくく、箱本体内部の温度が維持されるので、保冷性を良好にできる。また、軟質シートを、柔軟性を有する紙材を積層して形成したことにより、この軟質シートを箱本体および嵌合溝にて挟持することでこの軟質シートが圧縮されて気密性が向上し箱本体の気密性をより高度に維持できる。
【0094】
請求項2記載の保冷性収容箱によれば、突出体を、板紙材を折りたたんで形成することにより、箱本体と蓋体とを嵌合させた際に形成される、箱本体の内部と外気との間の複雑な形状の通気路をこの板紙材にて、より容易かつ確実に形成できる。
【0095】
請求項3記載の保冷性収容箱によれば、板紙材にて箱本体および蓋体を形成したことにより使用済み後の廃棄処理を容易にできる。また、箱本体内部を気密に保つ軟質シートを、蓋体と箱本体とで嵌合溝にて挟持することにより、箱本体内部と外気との間に形成される通気路が複雑な形状に形成されて箱本体の内部を気密に保つため、箱本体の内側と外側とで互いに熱が伝わりにくく、箱本体内部の温度が維持されるので、保冷性を良好にできる。また、軟質シートを、柔軟性を有する紙材を積層して形成したことにより、この軟質シートを箱本体および嵌合溝にて挟持することでこの軟質シートが圧縮されて気密性が向上し箱本体の気密性をより高度に維持できる。
【0096】
請求項4記載の保冷性収容箱によれば、箱本体を略矩形状に形成し、この箱本体の少なくとも相対する一対の側部を、底面部の相対する一対の辺縁からそれぞれ折り曲げて形成された外面板部、およびこれら外面板部の上端縁から箱本体の内側に折り曲げられ外面板部に空隙を介して対向する内面板部にて形成し、これら内面板部に、これら内面板部および外面板部の間の空隙に連通する冷気流入孔を形成する。この結果、たとえば収容物を収容した状態で冷蔵すると、冷気が冷気流通孔から内面板部および外面板部の間の空隙に流入して断熱層となり、箱本体の外部からの熱を遮断して、箱本体内の温度上昇を抑制できる。
【0097】
請求項5記載の保冷性収容箱によれば、内面板部の下端縁に箱本体の内方に折り曲げられてこの箱本体の底面部に重合する先端折曲部を設け、これら先端折曲部の上側に亘って箱本体の底面部に対向して略矩形平板状の底板を載置することにより、この底面部および底板の間に空隙が形成されるため、たとえば収容物を収容した状態で冷蔵すると、この空隙内の空気が冷却されて断熱層となり、箱本体の外部からの熱を遮断して、箱本体内の温度上昇をより抑制できる。
【0098】
請求項6記載の保冷性収容箱によれば、先端折曲部の箱本体の内方への折り曲げにより冷気流入孔が形成されるように、内面板部に先端折曲部に連続して切込部を形成することにより、先端折曲部を折り曲げるだけで冷気流入孔を切込部から容易に形成できる
【0099】
請求項記載の保冷性収容箱によれば、箱本体を略矩形状に形成し、この箱本体の開口上面縁部の四隅の角部を形成する一方の側縁にこの角部を形成する他方の側縁が嵌合する段差部をそれぞれ設けることにより、箱本体の四隅の角部にて一方の側縁に他方の側縁が段差部を介して嵌合するため、箱本体の外郭を必要以上に突出することなく形成できる。
【図面の簡単な説明】
【図1】 本発明の保冷性収容箱の第1の実施の形態を示す斜視図である。
【図2】 同上保冷性収容箱を示す箱本体の展開平面図である。
【図3】 同上保冷性収容箱を示す蓋体の斜視図である。
【図4】 同上保冷性収容箱を示す縦断正面図である。
【図5】 同上保冷性収容箱の他の例の蓋体を示す斜視図である。
【図6】 本発明の保冷性収容箱の第2の実施の形態を示す斜視図である。
【図7】 同上保冷性収容箱を示す縦断正面図である。
【図8】 同上保冷性収容箱における箱本体内部の温度の時間変化を示すグラフである。
【符号の説明】
1 箱本体
2,27,33 板紙材
3 底面部
4a,4b,4c,4d 外面板部としての外面側板部
15a,15b,15c,15d 内面板部としての内面側板部
23 開口上面縁部
24a,24b,24c,24d 段差部
26 蓋体
30a,30b,30c,30d 内側面部
37 突出体
40 軟質シート
53 嵌合溝
61a,61b 先端折曲部
62 切込部
63 冷気流入孔
64 空隙
65 底板としての身板
[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a cold insulation storage box including a box body and a lid formed of a paperboard material.
[0002]
[Prior art]
  Conventionally, this type of cold storage container is provided with a box body and a lid formed of so-called foamed polystyrene.
[0003]
  And this cool-keeping accommodation box accommodates to-be-contained objects, such as fish, in a box main body, and covers or transports a cover body by covering with a box main body.
[0004]
[Problems to be solved by the invention]
  However, in the above-described cold-insulated storage box, if the polystyrene foam is not properly treated, there is a risk of generating gas that adversely affects the environment, and therefore disposal after use is not easy.
[0005]
  Therefore, it is conceivable to form the box main body and the lid body with a cardboard material that can be easily disposed of, but a general cardboard material is disadvantageous in terms of cold insulation as compared with a storage box made of polystyrene foam. Has the problem.
[0006]
  This invention is made | formed in view of such a point, and it aims at providing the cool storage container which is easy to discard after use and has favorable cold storage property.
[0007]
[Means for Solving the Problems]
  The cold insulation storage box according to claim 1 is a box main body formed by opening a top surface with a paperboard material, and an open top surface of the box main body formed by a paperboard material and detachably fitted to the box main body. A lid that closes the box body, a soft sheet that is sandwiched between the lid body and the box body in a state where the lid body is fitted to the box body, and closes the upper open surface of the box body, and a paperboard material. A protrusion that is formed and is attached to at least one of the inner upper surface of the lid and the lid side of the soft sheet,Formed by laminating flexible paper materials,The box is sandwiched by at least the inner upper surface of the lid and the opening upper surface edge of the box body, the side of the projecting body, and the inner surface of the box body by fitting the lid to the box body. The inside of the main body is kept airtight.
[0008]
  And the disposal processing after used becomes easy by having formed the box main body, the cover body, and the protrusion with the paperboard material. Further, the box body is formed by opening a top surface with a paperboard material, and a lid body that is detachably fitted to the box body and closes the opening top surface of the box body is formed with a paperboard material. A protrusion formed of paperboard material is attached to at least one of the lid side of the soft sheet sandwiched by the box body and the inner upper surface of the lid body, and the inner upper surface of the lid body is fitted by fitting the lid body to the box body. In addition, a soft sheet is sandwiched between the edge of the opening upper surface of the box body, the side part of the projecting body, and the inner side surface of the box body to keep the inside of the box body airtight. As a result, heat is not easily transmitted to the inside and outside of the box body, and the temperature inside the box body is maintained, so that the cold insulation is improved.In addition, since the soft sheet is formed by laminating flexible paper materials, the soft sheet is compressed between the box body and the fitting groove so that the air tightness is improved. Maintain a higher degree of airtightness of the body.
[0009]
  The cold insulation storage box according to claim 2 is the cold insulation storage box according to claim 1, wherein the protrusion is formed by folding a paperboard material.
[0010]
  Then, by forming the projecting body by folding the paperboard material, a complicated-shaped air passage between the inside of the box body and the outside air is formed when the box body and the lid are fitted together. It is easier and more reliable to form with this paperboard material.
[0011]
  The cold insulation storage box according to claim 3 has a box body formed by opening a top surface with a paperboard material, and a fitting groove formed with a paperboard material and fitted to the opening top surface edge of the box body. A lid that is provided along the inner side surface and is detachably fitted to the box body to close the upper open surface of the box body;Formed by laminating flexible paper materials,A soft sheet that is sandwiched between the lid and the box body with the fitting groove in a state in which the lid is fitted to the box body, closes the upper surface of the opening of the box body, and keeps the inside of the box body airtight; Is provided.
[0012]
  And the disposal processing after used becomes easy by forming a box main body and a lid with a paperboard material. In addition, a flexible sheet that keeps the inside of the box body airtight is sandwiched between the lid and the box body with a fitting groove, so that the air passage formed between the inside of the box body and the outside air has a complicated shape. In order to keep the inside of the box body airtight, heat is hardly transmitted between the inside and outside of the box body, and the temperature inside the box body is maintained, so that the cold insulation is improved.In addition, since the soft sheet is formed by laminating flexible paper materials, the soft sheet is compressed between the box body and the fitting groove so that the air tightness is improved. Maintain a higher degree of airtightness of the body.
[0013]
  The cold insulation storage box according to claim 4 is the cold insulation storage box according to any one of claims 1 to 3, wherein the box body is formed in a substantially rectangular shape, and at least a pair of opposing side portions of the box body are An outer surface plate formed by bending from a pair of opposite edges of the bottom surface portion, and an inner surface that is bent from the upper edge of the outer surface plate portion to the inside of the box body and faces the outer surface plate portion through a gap. The inner plate portions are formed by face plate portions, and each of the inner surface plate portions has a cold air inflow hole communicating with a gap between the inner surface plate portion and the outer surface plate portion.
[0014]
  The box body is formed in a substantially rectangular shape, and at least a pair of opposite side portions of the box body is bent from a pair of opposite edges of the bottom surface portion, and the outer plate portions. The inner plate is bent from the upper edge of the box to the inside of the box body and faces the outer plate through the gap, and communicates with the gap between the inner plate and the outer plate. A cold air inflow hole is formed. As a result, for example, when refrigerated in a state in which the contents are accommodated, the cold air flows into the gap between the inner surface plate portion and the outer surface plate portion from the cold air circulation hole to become a heat insulating layer, and blocks heat from the outside of the box body. , Suppress the temperature rise in the box body.
[0015]
  The cold insulation storage box according to claim 5 is the cold insulation storage box according to claim 4, wherein the inner face plate portion is bent inward of the box body from the lower end edge on the front end side of the inner face plate portion. A bottom plate having a substantially rectangular flat plate that is placed opposite to the bottom surface of the box body over the top bent portions of the inner surface plate portion. It is equipped.
[0016]
  And the front end bending part which is bent inward of the box main body at the lower end edge of the inner surface plate part and overlaps with the bottom surface part of the box main body is provided, and the bottom surface part of the box main body extends above the front end bending part. By placing a substantially rectangular flat bottom plate facing each other, a gap is formed between the bottom surface portion and the bottom plate. For example, if refrigeration is performed in a state where an object is accommodated, the air in the gap is cooled. It becomes a heat insulation layer, blocks heat from the outside of the box body, and further suppresses temperature rise in the box body.
[0017]
  According to a sixth aspect of the present invention, there is provided the cold insulation storage box according to the fifth aspect, wherein the inner face plate portion is formed with a cold air inflow hole by bending the tip bent portion inward of the box body. A cut portion is formed continuously from the tip bent portion.
[0018]
  Then, the front end bent portion is formed continuously with the front end bent portion on the inner surface plate portion so that the cold air inflow hole is formed by bending the front end bent portion inward of the box body. Easily form cold air inflow holes from cuts by simply bending.
[0019]
  Claim7The cold storage container according to claim 1 to claim 1.6In any one of the cold insulation storage boxes, the box body is formed in a substantially rectangular shape, and the other side edge forming the corner portion is formed on one side edge forming the corner portions of the four corners of the opening upper surface edge portion. Each is provided with a stepped portion to be fitted.
[0020]
  Then, the box body is formed in a substantially rectangular shape, and a stepped portion that is fitted with the other side edge forming the corner portion on one side edge forming the corner portions of the four corners of the opening upper surface edge portion of the box body is formed. By providing each, the other side edge is fitted to one side edge at the corners of the four corners of the box body via the stepped portion, so that the outline of the box body is formed without protruding more than necessary.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the configuration of the first embodiment of the cold insulation storage box of the present invention will be described with reference to FIGS. 1 to 4.
[0022]
  As shown in FIGS. 1 and 2, reference numeral 1 denotes a box body, and the box body 1 is formed of a paperboard material 2 having a water resistance of, for example, about 3 mm in thickness, such as a water-resistant cardboard. . The box body 1 has a bottom surface portion 3 formed in a substantially rectangular shape. Each side of the bottom surface portion 3 has a substantially rectangular outer surface side plate portion 4a as an outer surface plate portion of the box body 1 respectively. , 4b, 4c, 4d are connected. Folds 5a, 5b, 5c, and 5d are formed in the connecting portions between the outer surface side plate portions 4a, 4b, 4c, and 4d and the bottom surface portion 3, respectively. The outer surface side plate portions 4a, 4b, 4c, and 4d are These folds 5a, 5b, 5c and 5d are formed by bending.
[0023]
  Further, the outer surface side plate portions 4a and 4b are integrated by a substantially square connecting portion 10a. Similarly, the outer surface side plate portions 4b and 4c, the outer surface side plate portions 4c and 4d, and the outer surface side plate portions 4d and 4a are respectively integrated with each other by connecting portions 10b, 10c, and 10d having a substantially square shape. The folds 11a and 11b are formed at the connecting portion between the connecting portion 10a and the outer surface side plate portions 4a and 4b, respectively. Similarly, the folds 11c and 11d are connected to the connecting portion between the connecting portion 10b and the outer surface side plate portions 4b and 4c, and the folds 11e and 11f and the connecting portion 10d are connected to the connecting portion between the connecting portion 10c and the outer surface side plate portions 4c and 4d. Folds 11g and 11h are formed at the connecting portions with the outer surface side plate portions 4d and 4a, respectively.
[0024]
  Further, for example, substantially square notches 12a, 12b, 12c, and 12d are provided at the outer corners of the connecting portions 10a, 10b, 10c, and 10d, respectively. Each of the connecting portions 10a, 10b, 10c, and 10d includes the notches 12a, 12b, 12c, and 12d and the connecting portions 10a, 10b, 10c, and 10d that face the notches 12a, 12b, 12c, and 12d. Folds 13a, 13b, 13c, and 13d are formed along diagonal lines connecting the corners of the two.
[0025]
  Further, the front side which is the outer side of the outer surface side plate portion 4a, that is, the upper end edge when the box body 1 is assembled, has a substantially rectangular shape as the inner surface plate portion via the substantially rectangular upper edge plate portion 14a. An inner surface side plate portion 15a is connected and formed. The upper edge plate portion 14a has a longitudinal dimension substantially equal to that of the outer surface side plate portion 4a. Furthermore, the inner surface side plate portion 15a has a slightly smaller longitudinal dimension than the upper edge plate portion 14a. An end plate 16a as a side portion of the box body 1 is formed by the outer surface side plate portion 4a and the inner surface side plate portion 15a. In addition, in the longitudinal direction of the inner surface side plate portion 15a, that is, in the width direction of the box body 1, insertion protrusions 17a and 17b having a substantially rectangular shape are connected to each other. A fold 18a is formed at the connecting portion between the outer surface side plate portion 4a and the upper edge plate portion 14a, and a fold 19a is formed at the connecting portion between the upper edge plate portion 14a and the inner surface side plate portion 15a.
[0026]
  On the other hand, on the tip side which is the outer side of the outer surface side plate portion 4b, that is, the upper end edge when the box body 1 is assembled, the substantially rectangular shape as the inner surface plate portion is interposed via the substantially rectangular upper edge plate portion 14b. An inner surface side plate portion 15b is connected and formed. The upper edge plate portion 14b has a slightly smaller longitudinal dimension than the outer surface side plate portion 4b, and the inner surface side plate portion 15b has a longitudinal dimension substantially equal to that of the outer surface side plate portion 4b. A side plate 16b as a side portion of the box body 1 is formed by the outer surface side plate portion 4b and the inner surface side plate portion 15b. Further, a fold line 18b is formed at the connecting portion between the outer surface side plate portion 4b and the upper edge plate portion 14b, and a fold line 19b is formed at the connecting portion between the upper edge plate portion 14b and the inner surface side plate portion 15b. Yes. Further, substantially rectangular support side plate portions 20a and 20b are connected and formed in the longitudinal direction of the inner surface side plate portion 15a, that is, the longitudinal direction of the box body 1, respectively. Cut portions 21a and 21b and folds 22a and 22b are provided at the connecting portions of the support side plate portions 20a and 20b and the inner surface side plate portion 15b, respectively. These cut portions 21a and 21b are cut by, for example, about 40 mm from the outer side of the inner surface side plate portion 15b, and the end portions of the cut portions 21a and 21b are cut by about 5 mm toward the support side plate portions 20a and 20b, respectively. Is formed. Furthermore, the folds 22a and 22b are provided in the direction opposite to the notches 21a and 21b along the width direction of the inner surface side plate portion 15b from the end portions of the notches 21a and 21b.
[0027]
  Then, the outer side plate portion 4c, on the tip side, that is, the upper end edge when the box body 1 is assembled, is similar to the outer plate portion 4a through the substantially rectangular upper edge plate portion 14c. A substantially rectangular inner surface side plate portion 15c as a portion is connected and formed, and an end plate 16c as a side portion of the box body 1 is formed by the outer surface side plate portion 4c and the inner surface side plate portion 15c. Further, insertion protrusions 17c and 17d are connected to the inner surface side plate portion 15c, respectively. Further, a fold line 18c is formed at the connecting portion between the outer surface side plate portion 4c and the upper edge plate portion 14c, and a fold line 19c is formed at the connecting portion between the upper edge plate portion 14c and the inner surface side plate portion 15c. Further, the outer side plate portion 4d has an inner side plate portion on the front end side which is the outer side, that is, the upper end edge when the box body 1 is assembled, via the substantially rectangular upper edge plate portion 14d as in the outer surface side plate portion 4b. A substantially rectangular inner side plate 15d is connected and formed, and a side plate 16d as a side portion of the box body 1 is formed by the outer side plate 4d and the inner side plate 15d. Further, a fold 18d is formed at the connecting portion between the outer surface side plate portion 4d and the upper edge plate portion 14d, and a fold 19d is formed at the connecting portion between the upper edge plate portion 14d and the inner surface side plate portion 15d. Further, support side plate portions 20c and 20d are connected to the inner surface side plate portion 15d. In addition, cut portions 21c and 21d and folds 22c and 22d are formed at the connecting portion between the support side plate portions 20c and 20d and the inner surface side plate portion 15d.
[0028]
  Further, an opening upper surface edge portion 23 is formed by each upper edge plate portion 14a, 14b, 14c, 14d. Further, at the corners of the four corners of the upper surface edge 23 of the opening, there is a difference in longitudinal dimension between the upper edge plate part 14b and the outer surface side plate part 4b, and a difference in longitudinal dimension between the upper edge plate part 14d and the outer surface side plate part 4d. Accordingly, step portions 24a, 24b, 24c, and 24d are formed at both ends in the longitudinal direction of the upper edge plate portions 14b and 14d, respectively. The outer surface side plate portions 4a, 4b, the outer surface side plate portions 4b, 4c, the outer surface side plate portions 4c, 4d, and the outer surface side plate portions that form the corners of the opening upper surface edge 23 through the step portions 24a, 24b, 24c, 24d. 4d and 4a are fitted to each other and formed so as not to protrude more than necessary in the outline of the box body 1, that is, in the longitudinal direction and the width direction of the box body 1. Then, on the bottom surface portion 3 of the box body 1, a body plate 25 as a bottom plate formed in a substantially rectangular shape with the same paperboard material 2 as the box body 1 is placed. The body plate 25 is formed, for example, smaller than the bottom surface portion 3 by the thickness dimension of the inner surface side plate portions 15a, 15b, 15c, 15d.
[0029]
  Reference numeral 26 denotes a lid that is detachably fitted to the box body 1 and closes the upper surface of the opening of the box body 1. The lid body 26 is a paperboard material 27 having the same water resistance as the box body 1. The box body 1 is formed in substantially the same shape. That is, the lid 26 has end plates 28a and 28c and side plates 28b and 28d formed by folding the paperboard material 27 inward corresponding to the end plates 16a and 16c and the side plates 16b and 16d of the box body 1, respectively. doing. The inner surfaces of these end plates 28a, 28c and side plates 28b, 28d are inner side surface portions 30a, 30b, 30c, 30d, respectively. Further, an upper surface portion 31 that is an inner upper surface of the lid body 26 is formed in a substantially rectangular shape that is slightly larger than the bottom surface portion 3 in plan view. Further, a substantially rectangular protruding base end portion 32 is attached to and attached to a substantially central region of the upper surface portion 31. The protruding base end portion 32 is formed of a paperboard material 33 that is slightly thicker than the paperboard material 27. In addition, the longitudinal direction and the width direction of the protruding base end portion 32 are substantially along the longitudinal direction and the width direction of the upper surface portion 31.
[0030]
  Further, assembly portions 32a and 32b are connected to both ends of the protruding base end portion 32 in the width direction. The assembly part 32a has a longitudinal dimension substantially equal to the longitudinal dimension of the protruding base end part 32. Then, a substantially circular assembly convex portion 34 is connected and formed in a substantially central region of the outer side in the width direction of the assembly portion 32a. On the other hand, the assembly portion 32b is formed to have substantially the same dimensions as the assembly portion 32a, but a substantially circular assembly recess 35 having a radius of 40 mm, for example, is formed inwardly in a substantially central region of the outer side in the width direction. Has been. Furthermore, creases 36a and 36b are formed at the connecting portions of the protruding base end portion 32 and the assembly portions 32a and 32b, respectively. Then, the projecting body 37 is formed by folding the assembly parts 32a and 32b along the folds 36a and 36b and fitting the assembly convex part 34 to the assembly concave part 35.
[0031]
  Further, 40 is a soft sheet, the soft sheet 40, for example, a kraft paper 41 laminated on the front side surface 41a with polyethylene (polyethylene) or the like, and a plurality of the lap side paper 41b overlapped on the back side surface 41b, For example, it is so-called Watting paper composed of two sheets of tissue paper 42. The soft sheet 40 is formed in a substantially rectangular shape larger than the box body 1 in plan view. Further, the tissue paper 42 is bonded and fixed to the back side surface 41b of the kraft paper 41 with an adhesive or the like, for example.
[0032]
  Next, the operation of the first embodiment will be described.
[0033]
  First, when assembling the box body 1, the connecting portions 10 a, 10 b are raised inside the box body 1 along the folds 13 a, 13 b and folded, while the outer surface side plate part 4 b is moved along the fold 5 b with respect to the bottom surface part 3. Raise it at a right angle and fold it.
[0034]
  Next, the inner surface side plate portion 15b is bent toward the inner side of the box main body 1 from the fold line 18b and the fold line 19b, and the upper edge plate portion 14b forms a part of the opening upper surface edge portion 23. Align with side plate 4b. At this time, step portions 24a and 24b are formed at both ends in the longitudinal direction of the upper edge plate portion 14b due to a difference in longitudinal dimension with respect to the outer surface side plate portion 4b.
[0035]
  Further, the support side plate portions 20a and 20b are bent along the folds 22a and 22b toward the inside of the box body 1, and are respectively positioned on the folds 5a along the folded connection portions 10a and 10b.
[0036]
  Similarly, the outer surface side plate portion 4d is bent at a substantially right angle with respect to the bottom surface portion 3 along the fold 5d while folding the connecting portions 10c and 10d along the folds 13c and 13d. Further, the inner surface side plate portion 15d is bent from the fold line 18d and the fold line 19d to form a part of the opening upper surface edge portion 23 by the upper edge plate portion 14d, and the inner surface side plate portion 15d becomes the inner surface of the box body 1. The inner surface side plate portion 15d and the outer surface side plate portion 4d are polymerized. At this time, step portions 24c and 24d are formed at both ends in the longitudinal direction of the upper edge plate portion 14d due to a difference in longitudinal dimension with respect to the outer surface side plate portion 4b. Further, the support side plate portions 20c and 20d are bent along the folds 22c and 22d toward the inside of the box body 1, and are respectively positioned on the folds 5c along the folded connection portions 10c and 10d.
[0037]
  Furthermore, the outer surface side plate portion 4a is raised and bent so as to be substantially perpendicular to the bottom surface portion 3 and the outer surface side plate portions 4b and 4d from the fold 5a.
[0038]
  Next, the inner side plate portion 15a is bent toward the inside of the box body 1 from the fold line 18a and the fold line 19a, and the connecting portions 10a and 10d and the support side plate portions 20a and 20d are connected to the inner side plate portion 15a and the outer side plate portion 4a. The inner surface side plate portion 15a is superposed on the outer surface side plate portion 4a while being sandwiched. At this time, both ends of the upper edge plate portion 14a in the longitudinal direction are fitted to the step portions 24a and 24d at both ends of the upper edge plate portion 14a.
[0039]
  Similarly, the inner side plate portion 15c is folded inward along the crease 5c toward the inside of the box body 1, and the connecting portions 10b and 10d and the supporting side plate portions 20b and 20c are sandwiched between the inner side plate portion 15c and the outer side plate portion 4c. However, the inner surface side plate portion 15c is superposed on the outer surface side plate portion 4c.
[0040]
  Then, the insertion protrusions 17a and 17b are inserted into the cut portions 21d and 21a, respectively, and the insertion protrusions 17c and 17d are inserted into the cut portions 21b and 21c, respectively. After that, the body plate 25 is placed on the bottom surface portion 3.
[0041]
  Similarly, after assembling the lid body 26, a fresh sheet that needs to be refrigerated, such as fish, is accommodated inside the box body 1, and the soft sheet 40 is placed on the upper surface of the opening of the box body 1. The upper surface of the opening is closed. At this time, the soft sheet 40 is placed so that the tissue paper 42 faces the inside of the box body 1 and the longitudinal direction of the soft sheet 40 is substantially along the longitudinal direction of the box body 1.
[0042]
  Further, the lid body 26 is fitted on the box body 1 with the soft sheet 40 placed on the box body 1.
[0043]
  At this time, as shown in FIG. 4, the substantially central region of the flexible sheet 40 is pushed along the outer periphery of the projecting body 37 while being pushed vertically downward toward the bottom surface portion 3 of the box body 1 by the projecting body 37. It is sandwiched between the side portions of the indentations and protrusions 37 and the inner surface side plate portions 15a, 15b, 15c and 15d of the box body 1.
[0044]
  Further, the soft sheet 40 is sandwiched between the opening upper surface edge 23 and the upper surface portion 31 on the upper side of the opening upper surface edge 23, and the surplus portion 51 is formed on the outer surface side plate portions 4a, 4b, 4c, 4d of the box body 1. And the inner side surface portions 30a, 30b, 30c, and 30d of the lid body 26. Thereby, the ventilation path 52 is formed in a complicated shape having a substantially concave shape in a cross-sectional view.
[0045]
  In this state, the box body 1, the lid body 26, and the soft sheet 40 are stored in a refrigerator or the like and refrigerated.
[0046]
  Further, after use, the box body 1 and the lid body 26 are discarded by incineration or the like.
[0047]
  As a result, the airtightness of the inside of the box body 1 is maintained by the complicated shape of the air passage 52 and the soft sheet 40. Therefore, it is difficult for heat to be transmitted between the inside and outside of the box body 1, and the box body from the refrigerator or the like. 1. Since the inside of the box body 1 can be kept cold even after the lid body 26 and the soft sheet 40 are taken out, it is possible to improve the cold keeping property.
[0048]
  Further, since the box body 1 and the lid body 26 are respectively formed of the paperboard material 2, they can be easily disposed of by incineration after use.
[0049]
  Further, the airflow of the soft sheet 40 is blocked by the kraft paper 41 whose front side is laminated, and the tissue paper 42 superimposed on the back side 41b of the kraft paper 41 is sandwiched between the box body 1 and the lid 26. By compressing and improving airtightness, the airtightness of the box body 1 can be maintained at a higher level.
[0050]
  The tissue paper 42 absorbs moisture and the like evaporated from an object to be stored such as fresh food stored in the box body 1 to improve the airtightness. Can be maintained.
[0051]
  In addition, the protrusion 37 can be easily formed by simply folding the paperboard material 33, and before the lid body 26 is assembled, the protrusion 37 having the same thickness is formed by a single paperboard material 33. The package can be cut in half.
[0052]
  Further, the assembly convex part 34 is connected and formed in the substantially central area of the outer side in the width direction of the assembly part 32a, and the assembly concave part 35 is formed in the substantially central area of the outer side in the width direction of the assembly part 32b. Accordingly, when the assembly parts 32a and 32b are folded, the assembly protrusions 34 are fitted into the assembly recesses 35 so that the assembly parts 32a and 32b are not easily detached, so that the protrusion 37 can be formed more reliably.
[0053]
  The protrusion 37 is attached to the upper surface portion 31 of the lid 26 so that the position of the protrusion 37 with respect to the box body 1 and the lid 26 is fixed when the lid 26 is fitted to the box body 1. Therefore, the soft sheet 40 can be easily and reliably sandwiched between the box body 1 and the lid body 26.
[0054]
  Further, since the stepped portions 24a, 24b, 24c, and 24d are formed, the outer surface side plate portions 4a, 4b, 4c, and 4d are more deeply fitted to each other. It can be assembled without protruding more than necessary in the longitudinal direction and the width direction.
[0055]
  Further, since the paperboard material 33 is larger in thickness than the paperboard material 2 of the box body 1 and the paperboard material 27 of the lid 26, the flexible sheet 40 can be more securely sandwiched by the side portion of the protrusion 37.
[0056]
  In the first embodiment, as shown in FIG. 5, the lid body 26 has a fitting groove 53 in the upper surface portion 31 along the inner side surface portions 30a, 30b, 30c, 30d instead of the projecting body 37. And the flexible sheet 40 may be sandwiched between the fitting groove 53 and the box body 1.
[0057]
  Further, the protrusion 37 may be attached by being adhered to the surface of the soft sheet 40, that is, the upper side of the kraft paper 41. In this case, since the soft sheet 40 can be placed in a state where the protruding body 37 is positioned with respect to the opening upper surface edge 23 of the box body 1, the soft sheet 40 is placed on the box body 1 and the lid body 26. And can be positioned more easily.
[0058]
  Furthermore, the assembly convex part 34 and the assembly concave part 35 may be formed in, for example, a rectangular shape as long as they can be securely fitted to each other, and the shape is not limited.
[0059]
  Next, a second embodiment of the cold insulation storage box of the present invention will be described with reference to FIG. 6 and FIG.
[0060]
  The embodiment shown in FIGS. 6 and 7 has basically the same configuration as the embodiment shown in FIGS. 1 to 4, but the projecting body 37 is formed of a paperboard material 33. The soft sheet 40 is bonded and fixed to the front side surface 41a of the kraft paper 41 with, for example, an adhesive.
[0061]
  Further, on the tip side which is the outer side of the inner surface side plate portions 15b and 15d of the box body 1, that is, on the lower end edge when the box body 1 is assembled, the tip bent portions 61a and 61b are formed through the folds 60a and 60b. It is formed extending from the inner surface side plate portions 15b and 15d. These folds 60a and 60b are formed along the longitudinal direction of the inner surface side plate portion 15b, and the front end bent portions 61a and 61b are substantially inward of the box body 1 with respect to the inner surface side plate portions 15b and 15d. The folds 60a and 60b are bent vertically and superposed on the bottom surface portion 3.
[0062]
  Further, on the inner surface side plate portions 15b and 15d side of the folds 60a and 60b, a plurality of, for example, three, substantially rectangular cut portions 62 along the folds 60a and 60b are spaced apart from each other at substantially equal intervals. It is formed continuously with the bent portions 61a and 61b. For this reason, when the front end bent portions 61a and 61b are bent from the folds 60a and 60b toward the inside of the box body 1, the inner surface side plate portions 15b and 15d are formed along the cut portions 62 so that the outer surface side plate portion 4b. , 4d direction, and the cold air inflow hole 63 is formed. These cold air inflow holes 63 communicate with a gap 64 between the inner surface side plate portions 15b and 15d and the outer surface side plate portions 4b and 4d, and the cold air is refrigerated when refrigerated in a state in which the contents are accommodated in the box body 1. It flows into the space 64 between the inner surface side plate portions 15b and 15d and the outer surface side plate portions 4b and 4d through the inflow hole 63, and a heat insulating layer is formed in the space 64 by cold air.
[0063]
  Further, a body plate 65 as a bottom plate is placed facing the bottom surface portion 3 on the upper side of the bent portions 61a, 61b of the box body 1 inwardly. For this reason, a gap 66 is formed between the lower surface of the body board 65 and the bottom surface portion 3 of the box body 1 by the thickness of the front bent portions 61a and 61b, that is, the thickness of the paperboard material 2 forming the box body 1. The As a result, when refrigerated in a state where the contents are accommodated in the box body 1, a heat insulating layer is formed in the gap 66 by cold air.
[0064]
  Further, the side plates 28b and 28d of the lid body 26 are formed without folding the paperboard material 27.
[0065]
  And the box main body 1 is assembled similarly to the said 1st Embodiment. That is, while folding the connecting portions 10a, 10b, 10c, 10d along the folds 13a, 13b, 13c, 13d, respectively, the outer side plate portions 4b, 4d are raised along the folds 5b, 5d to be bent, and the inner side plate portions 15b, 15d is bent from the folds 18b and 18d and the folds 19b and 19d, respectively, and the upper edge plate portions 14b and 14d form a part of the opening upper surface edge 23, and the inner surface side plate portions 15b and 15d and the outer surface side plate portions 4b and 4d And are polymerized. At this time, due to the dimensional difference between the width dimension of the upper edge plate portions 14b and 14d and the thickness dimension of the inner surface side plate portions 15b and 15d and the outer surface side plate portions 4b and 4d, the inner surface side plate portions 15b and 15d and the outer surface side plate portion 4b. , 4d, gaps 64 are formed.
[0066]
  Thereafter, when the front bent portions 61a and 61b are bent inward of the box body 1 along the folds 60a and 60b from the inner surface side plate portions 15b and 15d and overlapped with the bottom surface portion 3, the inner surface side plate portions 15b and 15d are overlapped. Is cut and raised from the notch portion 62 to the outer surface side plate portions 4b and 4d to form the cold air inflow hole 63.
[0067]
  Further, the supporting side plate portions 20a, 20b, 20c, and 20d are folded along the folds 22a, 22b, 22c, and 22d, respectively, and are positioned on the folds 5a and 5c along the folded connection portions 10a and 10b, respectively. After the side plates 4a and 4c are raised and bent from the folds 5a and 5c so as to be substantially perpendicular to the bottom surface 3 and the outer side plates 4b and 4d, the inner side plates 15a and 15c are bent from the folds 18a and 19a. While bending, the connecting portions 10a and 10d and the supporting side plate portions 20a and 20d are sandwiched between the inner surface side plate portion 15a and the outer surface side plate portion 4a, and the connecting portions 10b and 10c and the supporting side plate portions 20b and 20c are sandwiched between the inner surface side plate portion 15c and the outer surface side plate portion. These inner side plate portions 15a, 15b, 15c and 15d are superposed on the outer side plate portions 4a, 4b, 4c and 4d while being sandwiched between 4c.
[0068]
  Next, the insertion protrusions 17a and 17b are inserted into the cut portions 21d and 21a, respectively, and the insertion protrusions 17c and 17d are inserted into the cut portions 21b and 21c, respectively, to assemble the box body 1 having an open upper surface.
[0069]
  Thereafter, the body plate 65 is placed so as to face the bottom surface portion 3 over the front end bent portions 61a and 61b.
[0070]
  And in the state which accommodated objects, such as fresh, in this box main body 1, the soft sheet 40 which made the protrusion 37 the upper side is mounted on the upper side of such objects, such as fresh, and the protrusion 37 Is pushed into the box body 1 and the lid body 26 is fitted on the box body 1 so that the side portions of the projecting body 37 and the inner surface side plate portions 15a, 15b, 15c of the box body 1 as shown in FIG. 15d, the upper surface portion 31 of the lid body 26 and the opening upper surface edge portion 23 of the box body 1, and the outer surface side plate portions 4a, 4b, 4c, 4d of the box body 1 and the inner side surface portions 30a, 30b, 30c, 30d of the lid body 26. When each of the flexible sheets 40 is sandwiched, the air passage 52 is formed in a complicated shape having a substantially concave shape in a sectional view.
[0071]
  Thereafter, when the box body 1, the lid body 26 and the soft sheet 40 are stored in a refrigerator or the like and refrigerated, the cooled air in the box body 1 moves to the lower side in the box body 1 and cool air flows in. From the hole 63, it flows into the gap 64 between the inner surface side plate portions 15b, 15d and the outer surface side plate portions 4b, 4d, and a heat insulating layer is formed in the gap 64 by the cold air, so that heat from the outside of the box body 1 is generated. Transmission from the side plates 16b and 16d side of the box body 1 to the inside of the box body 1 is prevented.
[0072]
  At the same time, the air in the gap 66 between the body plate 65 and the bottom surface portion 3 is also cooled to form a heat insulating layer by cold air in the gap 66, and heat from the outside of the box body 1 is generated by the heat insulating layer in the box body. 1 to the inside of the box body 1 is prevented.
[0073]
  As described above, according to the second embodiment, the box body 1 and the lid 26 are formed of the paperboard materials 2 and 27 and the soft sheet 40 formed of the wadding paper is used as the box body 1 and By having the same configuration as that of the embodiment shown in FIGS. 1 to 4 such as being sandwiched by the lid 26, the same effects as those of the embodiment shown in FIGS. 1 to 4 can be obtained.
[0074]
  Further, by forming the cold air inflow hole 63 communicating with the gap 64 between the inner surface side plate portions 15b, 15d and the outer surface side plate portions 4b, 4d in the inner surface side plate portions 15b, 15d of the side plates 16b, 16d of the box body 1. For example, when the box body 1 is refrigerated in a state where an object to be stored such as fresh food is accommodated, the cold air in which the air in the box body 1 is cooled flows from the cold air inlet hole 63 to the inner surface side plate portions 15b and 15d and the outer surface side plate portion 4b. , 4d flows into the gap 64 to form a heat insulating layer, and heat from the outside of the box body 1 is blocked, so that the temperature rise in the box body 1 can be suppressed and the cold insulation can be further improved.
[0075]
  Further, front end bent portions 61a and 61b are formed integrally with the inner surface side plate portions 15b and 15d at the lower end edge which is the front end side of the inner surface side plate portions 15b and 15d, and the front end bent portions 61a and 61b are formed on the box body 1. After being folded inward and superposed on the bottom surface portion 3 of the box body 1, a body plate 65 having a substantially rectangular flat plate shape is formed so as to face the bottom surface portion 3 of the box body 1 over the top bent portions 61a and 61b. Place. As a result, a gap 66 corresponding to the thickness of the paperboard material 2 is formed between the bottom surface portion 3 and the body board 25. For example, when refrigerated in a state in which an object to be stored such as fresh food is stored, the air in the gap 66 is stored. Is cooled to form a heat insulating layer by cold air, heat from the outside of the box body 1 can be cut off, temperature rise in the box body can be further suppressed, and cold insulation can be further improved.
[0076]
  The cold air inflow hole 63 is formed so that the inner side plate portions 15b and 15d are partly cut from the notch portion 62 to the outer side plate portions 4b and 4d when the front bent portions 61a and 61b are bent inward of the box body 1, respectively. Therefore, the cold air inflow hole 63 can be easily formed simply by bending the front end bent portions 61a and 61b.
[0077]
  Further, when forming the cold air inflow hole 63, by cutting up a part of the inner surface side plate portions 15b, 15d from the cut portion 62 in the direction of the outer surface side plate portions 4b, 4d, the inner surface side plate portion 15b, Since a part of 15d abuts on the inner surface side plate portions 15b and 15d side of the outer surface side plate portions 4b and 4d to support these outer surface side plate portions 4b and 4d, the side plates 16b and 16d can be further reinforced.
[0078]
  Further, since the cold air inflow hole 63 is formed in the inner surface side plate portions 15b and 15d of the side plates 16b and 16d, a heat insulating layer by cold air can be formed over a wider area, so that the cold insulation can be further improved.
[0079]
  Further, by forming the cold air inflow hole 63 on the lower side of the box body 1, the cold air that becomes heavier as a result of being cooled can be more easily flowed into the gap 64.
[0080]
  Further, by forming the side plates 28b and 28d of the lid body 26 without folding the paperboard material 27, the lid body 26 can be assembled more easily and the width dimension of the lid body 26 can be reduced.
[0081]
  In the second embodiment, the protrusion 37 may be made thicker by folding the paperboard material 33, and is adhered to the upper surface portion 31 of the lid 26 as in the first embodiment. It may be attached by bonding with an agent.
[0082]
  Further, the front bent portions 61a and 61b, the cut portion 62, and the cold air inflow hole 63 may be formed in the inner surface side plate portions 15a and 15c of the end plates 16a and 16c. Also in this case, the same effect as that of the second embodiment can be obtained.
[0083]
  Furthermore, the tip bent portions 61a and 61b, the cut portion 62, and the cold air inflow hole 63 may be formed in all the inner surface side plate portions 15a, 15b, 15c, and 15d. In this case, since the heat insulation layer by cold air can be formed all around the box body 1, the cold insulation can be further improved.
[0084]
  The cold air inflow hole 63 may be provided in advance through the inner surface side plate portions 15b and 15d, and the inner surface side plate portions 15b and 15d are not provided with the tip bent portions 61a and 61b, and only the cold air inflow hole 63 is provided. It may be formed. In this case, the position of the cold air inflow hole 63 is not limited to the lower side of the inner surface side plate portions 15b and 15d.
[0085]
  Further, when it is not necessary to block heat from the bottom surface portion 3 side of the box body 1, the body plate 65 may not be placed in the box body 1.
[0086]
  Further, in each of the above embodiments, the size and shape of the box body 1, the lid body 26, and the flexible sheet 40 are changed according to the size, shape, or amount of the objects to be accommodated.
[0087]
  The soft sheet 40 does not have to be watting paper as long as the inside of the box body 1 can be kept airtight. The material of the soft sheet 40 may be any material as long as flexible paper materials are laminated. However, the present invention is not limited to kraft paper 41 and tissue paper 42.
[0088]
  Further, the surface of the kraft paper 41 may not be laminated. In this case, the kraft paper 41 can be discarded more easily after being used.
[0089]
  Further, the folds 18a to 18d, the folds 19a to 19d, and the folds of the inner side surface 30a to the inner side surface 30d of the lid 26 facing the box body 1 may be perforated. In this case, the box body 1 and the lid body 26 can be assembled more easily.
[0090]
【Example】
  Using the cold insulation storage box shown in FIG. 1, the time change of the temperature inside the box body 1 was measured. As a storage box of a comparative example, using a comparative example in which a box main body and a lid are formed with general foamed polystyrene, in a thermostatic chamber at a room temperature of 23 ° C., two 500 g of cold insulation materials cooled to −20 ° C., In each of the examples and comparative examples, the internal temperature was measured with a thermocouple (measured by the Hokkaido Prefectural Industrial Experiment Station, Engineering Test Results No. 13-666). The result is shown in FIG.
[0091]
  From this measurement result, the cold storage container of the example hardly changes the internal temperature for about 10 hours from the start of measurement, and is slightly better than the comparative example for about 15 hours from the start of measurement. As a whole, there was no significant difference in the coolability between the examples and the comparative examples.
[0092]
  As a result, it can be seen that the example has a good cold insulation property as well as the comparative cold insulation container box made of styrene foam while being formed of a paperboard material that can be easily processed after use.
[0093]
【The invention's effect】
  According to the cold insulation storage box of the first aspect, the disposal process after used can be facilitated by forming the box main body, the lid body and the projecting body with the paperboard material. Further, the box body is formed by opening a top surface with a paperboard material, and a lid body that is detachably fitted to the box body and closes the opening top surface of the box body is formed with a paperboard material. A protrusion formed of paperboard material is attached to at least one of the lid side of the soft sheet sandwiched by the box body and the inner upper surface of the lid body, and the inner upper surface of the lid body is fitted by fitting the lid body to the box body. In addition, a soft sheet is sandwiched between the edge of the opening upper surface of the box body, the side part of the projecting body, and the inner side surface of the box body to keep the inside of the box body airtight. As a result, heat is not easily transmitted to the inside and outside of the box body, and the temperature inside the box body is maintained, so that the cold insulation can be improved.In addition, since the soft sheet is formed by laminating flexible paper materials, the soft sheet is compressed between the box body and the fitting groove so that the air tightness is improved. The airtightness of the main body can be maintained at a higher level.
[0094]
  According to the cold insulation storage box according to claim 2, the inside of the box main body and the outside air formed when the box main body and the lid are fitted by forming the projecting body by folding the paperboard material. With this paperboard material, a complicatedly shaped air passage between the two can be formed more easily and reliably.
[0095]
  According to the cold insulation storage box of the third aspect, the disposal process after used can be facilitated by forming the box main body and the lid body with the paperboard material. In addition, a flexible sheet that keeps the inside of the box body airtight is sandwiched between the lid and the box body with a fitting groove, so that the air passage formed between the inside of the box body and the outside air has a complicated shape. Since the inside of the box body is kept airtight, heat is hardly transmitted between the inside and outside of the box body, and the temperature inside the box body is maintained, so that the cold insulation can be improved.In addition, since the soft sheet is formed by laminating flexible paper materials, the soft sheet is compressed between the box body and the fitting groove so that the air tightness is improved. The airtightness of the main body can be maintained at a higher level.
[0096]
  According to the cold insulation storage box of claim 4, the box body is formed in a substantially rectangular shape, and at least a pair of opposite side portions of the box body are bent from a pair of opposite edges of the bottom surface portion, respectively. The outer surface plate portions, and the inner surface plate portions that are bent from the upper edge of the outer surface plate portions to the inside of the box body and face the outer surface plate portions with a gap therebetween, and the inner surface plate portions are formed on the inner surface plate portions. And a cold air inflow hole communicating with the gap between the outer plate portions. As a result, for example, when refrigerated in a state in which the contents are accommodated, the cold air flows into the gap between the inner surface plate portion and the outer surface plate portion from the cold air circulation hole to become a heat insulating layer, and blocks heat from the outside of the box body. The temperature rise in the box body can be suppressed.
[0097]
  According to the cold insulation storage box according to claim 5, provided at the lower end edge of the inner surface plate portion are the front end bent portions that are bent inward of the box main body and overlapped with the bottom surface portion of the box main body, and these front end bent portions. Since a gap is formed between the bottom surface and the bottom plate by placing a substantially rectangular plate-like bottom plate facing the bottom surface of the box body over the upper side of the box, When refrigerated, the air in the gap is cooled to form a heat insulating layer, and heat from the outside of the box body can be blocked to further suppress the temperature rise in the box body.
[0098]
  According to the cold insulation storage box of the sixth aspect, the inner side plate portion is continuously cut from the tip bent portion so that the cold air inflow hole is formed by bending the tip bent portion inward of the box body. By forming the cut-in part, it is possible to easily form the cold air inflow hole from the cut-in part simply by bending the tip bent part..
[0099]
  Claim7According to the described cold insulation storage box, the box body is formed in a substantially rectangular shape, and the other side forming the corners on one side edge forming the corners of the four corners of the opening upper surface edge of the box body By providing each stepped part with which the edge is fitted, the other side edge is fitted to one side edge via the stepped part at the corners of the four corners of the box body. It can be formed without protruding.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a cold insulation storage box of the present invention.
FIG. 2 is a developed plan view of a box body showing the same cold storage container.
FIG. 3 is a perspective view of a lid body showing the same cold storage container.
FIG. 4 is a longitudinal sectional front view showing the same cold storage container.
FIG. 5 is a perspective view showing a cover of another example of the same cold storage container.
FIG. 6 is a perspective view showing a second embodiment of the cold insulation storage box of the present invention.
FIG. 7 is a longitudinal sectional front view showing the same cold storage container.
FIG. 8 is a graph showing the change over time of the temperature inside the box body in the same cold insulating storage box.
[Explanation of symbols]
        1 Box body
        2,27,33 Paperboard
        3 Bottom part
        4a, 4b, 4c, 4d External side plate as external plate
        15a, 15b, 15c, 15d Inner side plate as inner plate
        23 Opening edge
        24a, 24b, 24c, 24d Stepped part
        26 Lid
        30a, 30b, 30c, 30d Inner side
        37 Projection
        40 Soft sheet
        53 Mating groove
        61a, 61b Bend at tip
        62 notch
        63 Cold air inlet
        64 Air gap
        65 Body plate as bottom plate

Claims (7)

板紙材にて上面を開口して形成された箱本体と、
板紙材にて形成され前記箱本体に着脱可能に被嵌されてこの箱本体の開口上面を閉塞する蓋体と、
この蓋体を前記箱本体に被嵌させた状態でこの蓋体および前記箱本体にて挟持されてこの箱本体の開口上面を閉塞する軟質シートと、
板紙材にて形成され、前記蓋体の内側上面および前記軟質シートの前記蓋体側の少なくともいずれか一方に取り付けられた突出体と
を具備し、
前記軟質シートは、柔軟性を有する紙材を積層して形成され、前記蓋体の前記箱本体への被嵌により少なくとも前記蓋体の内側上面および前記箱本体の開口上面縁部と、前記突出体の側部および前記箱本体の内側面とで挟持されてこの箱本体の内部を気密に保つ
ことを特徴とした保冷性収容箱。
A box body formed by opening a top surface with a paperboard material;
A lid that is formed of a paperboard material and is detachably fitted to the box body to close the upper surface of the box body;
A soft sheet that is sandwiched between the lid body and the box body in a state in which the lid body is fitted to the box body, and closes the opening upper surface of the box body;
Formed of a paperboard material, and provided with a protrusion attached to at least one of the inner upper surface of the lid and the lid side of the soft sheet,
The soft sheet is formed by laminating flexible paper materials, and at least an inner upper surface of the lid body and an opening upper surface edge of the box body, and the protrusion by fitting the lid body to the box body. A cold-insulated storage box that is sandwiched between a side part of the body and an inner side surface of the box body to keep the inside of the box body airtight.
突出体は、板紙材を折りたたんで形成された
ことを特徴とした請求項1記載の保冷性収容箱。
The cold storage container according to claim 1, wherein the protrusion is formed by folding a paperboard material.
板紙材にて上面を開口して形成された箱本体と、
板紙材にて形成され、前記箱本体の開口上面縁部に嵌合する嵌合溝を内側面部に沿って設け、かつ前記箱本体に着脱可能に被嵌されてこの箱本体の開口上面を閉塞する蓋体と、
柔軟性を有する紙材を積層して形成され、前記蓋体を前記箱本体に被嵌させた状態でこの蓋体および前記箱本体にて前記嵌合溝で挟持されてこの箱本体の開口上面を閉塞しこの箱本体内部を気密に保つ軟質シートと
を具備したことを特徴とした保冷性収容箱。
A box body formed by opening a top surface with a paperboard material;
A fitting groove that is formed of a paperboard material and is fitted along the inner side surface portion to be fitted to the opening upper surface edge portion of the box body, and is detachably fitted to the box body to close the opening upper surface of the box body. A lid to
An upper surface of the box body that is formed by laminating paper materials having flexibility, and is sandwiched between the lid and the box body in the fitting groove in a state where the lid body is fitted to the box body. And a soft sheet that keeps the inside of the box airtight.
箱本体は、略矩形状に形成され、
この箱本体の少なくとも相対する一対の側部は、底面部の相対する一対の辺縁からそれぞれ折り曲げて形成された外面板部、およびこの外面板部の上端縁から前記箱本体の内側に折り曲げられ前記外面板部に空隙を介して対向する内面板部にて形成され、
これら内面板部は、これら内面板部と前記外面板部との間の空隙に連通する冷気流入孔をそれぞれ有した
ことを特徴とした請求項1ないし3いずれか一記載の保冷性収容箱。
The box body is formed in a substantially rectangular shape,
At least a pair of opposite side portions of the box body is bent to the inside of the box body from an outer surface plate portion formed by bending from a pair of opposite side edges of the bottom surface portion, and an upper end edge of the outer surface plate portion. Formed by an inner plate facing the outer plate through a gap,
The cold storage container according to any one of claims 1 to 3, wherein each of the inner surface plate portions has a cold air inflow hole communicating with a gap between the inner surface plate portion and the outer surface plate portion.
内面板部は、これら内面板部の先端側の下端縁から箱本体の内方に折り曲げられてこの箱本体の底面部に重合する先端折曲部を有し、
前記内面板部の各先端折曲部の上側に亘って前記箱本体の底面部に対向して載置される略矩形平板状の底板を具備した
ことを特徴とした請求項4記載の保冷性収容箱。
The inner surface plate portion has a front end bent portion that is bent from the lower end edge on the front end side of these inner surface plate portions to the inside of the box main body and overlaps with the bottom surface portion of the box main body,
5. The cold insulation property according to claim 4, further comprising a substantially rectangular flat plate-shaped bottom plate placed opposite to the bottom surface portion of the box main body over the top bent portion of the inner surface plate portion. Containment box.
内面板部は、先端折曲部の箱本体の内方への折り曲げにより冷気流入孔が形成されるように前記先端折曲部に連続して切込部が形成された
ことを特徴とした請求項5記載の保冷性収容箱。
The inner surface plate portion has a cut portion formed continuously with the front end bent portion so that a cold air inflow hole is formed by bending the front end bent portion inward of the box body. Item 6. The cold storage container according to Item 5.
箱本体は、略矩形状に形成され、開口上面縁部の四隅の角部を形成する一方の側縁にこの角部を形成する他方の側縁が嵌合する段差部をそれぞれ備えた
ことを特徴とした請求項1ないしいずれか一記載の保冷性収容箱。
The box body is formed in a substantially rectangular shape, and is provided with a stepped portion that fits one side edge that forms the corners of the four corners of the upper surface edge of the opening and the other side edge that forms the corners. The cold storage container according to any one of claims 1 to 6 .
JP2002172859A 2001-10-15 2002-06-13 Cold storage container Expired - Lifetime JP3698428B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2006096373A (en) * 2004-09-28 2006-04-13 Yoshizawa:Kk Cold insulation box made of corrugated fiberboard

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Publication number Priority date Publication date Assignee Title
JPS60101415U (en) * 1983-12-19 1985-07-10 株式会社 雅 polygonal paper container
JPS6180280U (en) * 1984-10-31 1986-05-28
JPH0454911Y2 (en) * 1986-12-26 1992-12-24
JPH056770Y2 (en) * 1988-06-20 1993-02-22
JPH02138176U (en) * 1989-04-21 1990-11-19
JP2508468Y2 (en) * 1993-05-17 1996-08-21 極東印刷紙工株式会社 Paper folding box
JP2001019052A (en) * 1999-07-01 2001-01-23 Maruyama Insatsu Kk Food transportation container
JP2002037240A (en) * 2000-07-28 2002-02-06 Dainippon Printing Co Ltd Packaging box

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