JP4527317B2

JP4527317B2 - Cold storage container

Info

Publication number: JP4527317B2
Application number: JP2001149800A
Authority: JP
Inventors: 一生浅野; 三行岩崎
Original assignee: JSP Corp
Current assignee: JSP Corp
Priority date: 2001-05-18
Filing date: 2001-05-18
Publication date: 2010-08-18
Anticipated expiration: 2021-05-18
Also published as: JP2002337952A

Description

【０００１】
【技術分野】
本発明は，氷を入れて生鮮食品などを保冷するための保冷容器に関する。
【０００２】
【従来技術】
発泡樹脂製の容器は，氷を入れて生鮮食品を保冷する保冷容器として用いられることが多い。このような保冷容器は，例えば，図１６に示すごとく，容器本体９６と蓋部９７とからなる。容器本体９６の中には，氷９８を詰めてその上に魚，イカ，タコ，貝などの生鮮食品を載せる。
ところで，上記従来の保冷容器においては，容器本体９６の中の氷９８が溶けて容器内が水９８１で満たされてしまうことがある。この場合，容器内の生鮮食品９５が水９８１に浸り，生鮮食品９５の品質が低下してしまう。また，運搬時に容器内の水９８１が容器本体９６と蓋部９７との間からこぼれ出て，作業者の手を滑らせるなどして運搬作業性が悪化するという問題があった。
そこで，従来，容器本体９６の容器内底部９０には排出穴９１を，容器本体９６及び蓋部９７にはこれらを貫通する竪穴９２を設け，排出穴９１と竪穴９２とを連結させて，容器内の水９８１を排出穴９１及び竪穴９２から容器外側に排出する技術が開示されている（実登録３０５７２２４号，特開２０００−２６４３７５）。
【０００３】
【解決しようとする課題】
しかしながら，保冷容器の容器内の保冷力は，氷だけの場合よりも，氷と水が混在していた方が大きい。
一方，上記従来の排出穴９１は，容器内底部９０に設けられていたため，容器内の水はすべて排出されてしまう。このため，上記従来の保冷容器では，保冷力が弱い。
【０００４】
本発明はかかる従来の問題点に鑑み，生鮮食品の品質劣化を抑制し，運搬作業性がよく，且つ保冷力の高い保冷容器を提供しようとするものである。
【０００５】
【課題の解決手段】
本発明は，容器本体と蓋部とよりなる発泡樹脂製の保冷容器において，
上記容器本体の側壁には，容器内底面よりも上部において開口する水抜穴を設け，
該水抜穴は，上記容器本体の側壁内に形成した通水路に連結しており，
該通水路は，上記側壁の上端から下端まで連通しており，
また，上記容器本体の側壁上端部には，該側壁上端部の一部を切欠いた横通水路が設けられており，
該横通水路は，該容器本体の上に他の容器本体を積み重ねたとき，該他の容器本体の上記通水路と上記容器本体の上記通水路とを連結するよう構成されていることを特徴とする保冷容器である（請求項１）。
【０００６】
本発明の保冷容器においては，容器本体の側壁に水抜穴が形成されており，この水抜穴は側壁内の通水路と連結している。このため，容器内に入れた氷が溶けて水が溜まってくると，その水は水抜穴及び通水路を通じて容器外側に排出される。このため，氷の上の生鮮食品が水に浸らず，品質劣化を抑制できる。
また，通水路は容器本体の側壁の上端から下端まで連通しているため，水は通水路の下端から容器外側底部に排出される。また，上に積み重ねた他の容器本体から流れ出た水は，通水路の上端に流れ落ち，通水路を通じて容器外側底部に排出される。このため，作業員の手が水で濡れず，運搬作業性が低下するおそれがない。
【０００７】
また，本発明においては，水抜穴は，容器内底面よりも上部の容器側壁に開口している。このため，水の一部が容器内底部に残りながら，水抜穴の高さに到達した水が水抜穴から排出される。このため，容器内底部に所定量の冷水が溜まり，氷の溶解を抑制する。したがって，本発明の保冷容器は，保冷力が高い。
また，上記容器本体の側壁上端部には，該側壁上端部の一部を切欠いた横通水路が設けられており，該横通水路は，該容器本体の上に他の容器本体を積み重ねたとき，該他の容器本体の上記通水路と上記容器本体の上記通水路とを連結するよう構成されている。
そのため，容器本体と，その上の他の容器本体との間に，両者の通水路を連結する横通水路が配置されることになる。したがって，容器本体と，他の容器本体との間から水が容器外側側壁に排出することを防止でき，運搬作業性が向上する。
【０００８】
以上のごとく，本発明によれば，生鮮食品の品質劣化を抑制し，運搬作業性がよく，且つ保冷力の高い保冷容器を提供することができる。
【０００９】
【発明の実施の形態】
本発明において，上記水抜穴は，上記容器本体の容器内底面から１〜３０ｍｍの高さに開口していることが好ましい。１ｍｍ未満の場合には，氷の溶解水の容器内残存量が少なく，保冷力が弱くなるおそれがある。一方，３０ｍｍを超える場合には，氷の溶解水の容器内残存量が多すぎて生鮮食品に水が触れて品質が劣化するおそれがある。
更には，上記水抜穴は，上記容器本体の容器内底面から５〜２５ｍｍの高さに開口していることが望ましい。
水抜穴は，開口面積が１０ｍｍ^２〜１２０ｍｍ^２であり且つ容器内底面に沿って横長形状に開口していることが好ましい。これにより，容器内の余剰の水の排出性が更によくなる。
【００１０】
容器本体の側壁上端部に開口する通水路の開口面積は，２８〜５０ｍｍ^２であることが好ましい。上側の容器本体の通水路からの水が流れ込み易いからである。
また，側壁下端部の通水路の開口断面の大きさは，長さ１０〜２０ｍｍ，幅５〜１２ｍｍであることが好ましい。下側の容器本体の通水路に水を流し込み易いからである。
側壁上端部及び側壁下端部に開口する通水路の開口断面形状は四角形，半円形，円形，円形の一部切欠き形状などが好ましい。成形容易だからである。
【００１１】
上記容器本体の側壁の外側底面は，その下に他の容器本体を積み重ねたときに該他の容器本体の側壁上端部に当接する当接部を有しており，上記通水路は，上記側壁上端部から上記当接部まで連通していることが好ましい（請求項２）。容器本体を複数積み重ねたときに当接部がその下の他の容器本体の上端に当接する場合には，上側の容器本体の当接部と，下側の他の容器本体の側壁上端部とは互いに当接する。このような当接部位に通水路を開口させることにより，容器本体を積み重ねたときに，上側の通水路から下側の通水路へ水が流れ込む。このため，上側の容器本体の通水路から出た水が，上側の容器本体の底面を伝って下側の容器本体の中に滴り落ちることを防止でき，生鮮食品の品質劣化を抑制できる。また，上下の容器本体の間から外部への水の排出が少なくなり，運搬作業性がよくなる。
【００１２】
容器本体の側壁下端部は凹条部，段状窪み部などがあり，その底面が上記当接部となる。容器本体の側壁上端部は，上記側壁下端部の形状に合った形状，または所定の間隙をもって嵌め合い可能な形状をしており，たとえば，凸条部，平面部などがある。このような形状の側壁上端部は，その上面において，上記側壁下端部の底面と当接する。
【００１３】
また，本発明においては，上記容器本体の側壁上端部には，該側壁上端部の一部を切欠いた横通水路が設けられており，該横通水路は，該容器本体の上に他の容器本体を積み重ねたとき，該他の容器本体の上記通水路と上記容器本体の上記通水路とを連結するよう構成されている。
したがって，容器本体と他の容器本体との間から，容器外側側壁に水が排出することを防止でき，運搬作業性が向上する。
上記横通水路の深さは２〜３ｍｍであることが好ましい。容器本体の強度を維持しつつ上側の他の容器本体の通水路から下側の容器本体の通水路への水の流れを確保できるからである。
【００１４】
一方，容器本体の上に他の容器本体を積み重ねたとき，上記容器本体の通水路の上端開口部と，他の容器本体の通水路の下端開口部とが，互いに同じ位置に開口している場合がある。この場合には，水は，上側の他の容器本体の通水路から，下側の容器本体の通水路へ直接流れる。
【００１５】
上記水抜穴，上記通水路，及び横通水路は容器本体の側壁のどの位置に設けても良い。容器本体の強度の観点からは側壁のコーナー部に設けるのが好ましい。
【００１６】
上記通水路は，上記容器本体の側壁の上端に開口する上端開口穴と，上記側壁の下端に開口する下端開口穴とからなり，上記上端開口穴と上記下端開口穴とは穴開口断面方向に互いに異なる位置に設けてあり，上記上端開口穴と上記下端開口穴とは上記容器本体の側壁の内部において連通していることが好ましい（請求項３）。これにより，通水路内の空気の流れが滞り，容器内部における外気温度の影響を抑制でき，保冷性が更に高まる。
【００１７】
上端開口穴と下端開口穴とは，穴開口断面方向に互いに異なる位置に設けてあればよく，たとえば，上端開口穴の中心軸と下端開口穴中心軸とがずれて配置されている。具体的には，１）上端開口穴と下端開口穴とは離れて配置され両者はその底部または側壁に連結された繋ぎ穴によって連通している場合，２）上端開口穴と下端開口穴とは隣接して配置され両者はその側壁に開口する繋ぎ穴を通じて連通している場合，３）上端開口穴と下端開口穴とはその底部の一部が重なって配置され両者はその底部の重なり部に開口する繋ぎ穴を通じて連通している場合がある。この中，上記２）が好ましい。通水路の中において空気が滞りやすく，また通水路の成型が容易だからである。
上記繋ぎ穴の開口断面は，四角形であり，その長さは３〜１０ｍｍ，幅は３〜１０ｍｍであることが好ましい。上端開口穴に流れ込んだ水を下端開口穴に導きやすくなる。また，上記繋ぎ穴の開口断面形状は，円形，半円，一部切欠円などでもよい。
【００１８】
上記蓋部は，その下面に上記容器本体の側壁上端部に嵌合する嵌合窪み部を有するとともに，該嵌合窪み部と上記蓋部の上面との間には連通穴を有することが好ましい（請求項４）。これにより，容器本体に蓋部を嵌め合わせたときに，連通穴と通水路とからなる水路が確保される。
上記蓋部の連通穴の開口面積は２０〜５０ｍｍ^２であることが好ましい。通水路の中の水の流れが良くなる。
連通穴の開口断面の形状は，四角形，円形，半円形，一部切欠円形などを用いることができる。
【００１９】
上記連通穴は，上記容器本体の上記通水路に水が流れるように配設してあることが好ましい（請求項５）。これにより，容器本体と蓋部との間から水が容器外側壁面に排出することを抑制でき，運搬作業性が向上する。
【００２０】
具体的には，たとえば，上記蓋部の上記連通穴は，上記側壁上端部の上記横通水路に開口していることが好ましい（請求項６）。容器本体の通水路と，蓋部の連通穴とが互いに異なる位置に開口している場合には，容器本体と蓋部との間から水が容器外側壁面に排出することを抑制するため，通水路と連通穴とを連結する水路が必要となる。かかる水路として上記横通水路を利用することにより，蓋部の連通穴から流れ出た水を，容器外側に排出させることなく，容器本体の横通水路を通じて通水路に導くことが出来る。
【００２１】
また，例えば，蓋部の連通穴の下端と容器本体の通水路の上端とを同じ位置に開口させてもよい。これにより，蓋部の連通穴から容器本体の通水路へ直接水が導入される。
【００２２】
上記容器本体は，容器本体を複数積み重ねたとき，各容器本体の水抜穴から排出された水が，各容器本体の上記通水路を経て最下段の容器本体の通水路の下端から排出されるよう構成してあることが好ましい（請求項７）。この場合，容器本体の側壁上端部と他の容器本体の当接部とを当接させて，容器本体を複数積み重ねたときに，容器本体内の水が，水抜穴及び通水路をつたって，最下段の容器本体の通水路の下端から排出される。したがって，積み重ねた容器本体の間から外部壁面への水の排出が抑制され，運搬作業性が向上する。
具体的な構成としては，たとえば，積み重ねる容器本体のすべてについて，１）その側壁上端部に，通水路の上端と連結し且つ上側に積み重ねた他の容器本体の通水路の下端と連結する横通水路を設ける，２）通水路の上端と下端とを同じ位置に開口させる。
【００２３】
上記容器本体は，それぞれその上部に上記蓋部を重ね合わせ，該容器本体と上記蓋部とを１ユニットとして，複数のユニットを重ね合わせたとき，各容器本体の上記水抜穴から排出された水が各ユニットにおける上記蓋部の上記連通穴及び上記容器本体の上記通水路を通じて最下段の容器本体の通水路の下端から排出されるよう構成してあることが好ましい（請求項８）。この場合，容器本体と蓋部とを１ユニットとして複数積み重ねたときに，容器本体内の水が，容器本体の水抜穴及び通水路並びに蓋部の連通穴をつたって，最下段の容器本体の通水路の下端から排出される。したがって，積み重ねた容器本体と蓋部との間から水が外部壁面に排出されることが抑制され，運搬作業性が向上する。
【００２４】
具体的構成としては，例えば，すべての容器本体と蓋部について，１）蓋部の連通穴の下端とその下側の容器本体の通水路の上端との間に横通水路を設け且つ容器本体の通水路の下端とその下側の他の蓋部の連通穴の上端との間に横連通路を設ける，２）通水路の上下端と連通穴の上下端とを同じ位置に開口させる。
【００２５】
【実施例】
（実施例１）
本発明の実施形態に係る保冷容器について，図１〜図１３を用いて説明する。
本例は，図１に示すごとく，容器本体６と蓋部７とよりなる発泡樹脂製の保冷容器である。容器本体６は，側壁６０の上端に凸条部６１を有する。容器本体６の外側底面には，他の保冷容器の容器本体における凸条部に嵌め合う凹条部６２を有している。凹条部６２の底面６２１は，凸条部６１の上面６１１と当接する当接部である。
【００２６】
図１，図２に示すごとく，容器本体６の側壁６０には，容器内底面６５よりも上部に，水抜穴１を開口させている。水抜穴１は，容器本体６の側壁６０内に形成した通水路２に連結している。通水路２は，側壁６０の上端の凸条部６１の上面６１１から下端の凹条部６２の底面６２１まで連通している。
【００２７】
容器本体６の側壁６０上端には，凸条部６１の一部を切欠いた横通水路３が設けられている。横通水路３は，図３に示すごとく，容器本体６の上に他の容器本体６を積み重ねたとき，上側の他の容器本体６の通水路２と下側の容器本体６の通水路２とを連結するよう構成されている。
【００２８】
図１，図２に示すごとく，通水路２は，側壁６０の上端に開口する上端開口穴２１と，側壁６０の下端に開口する下端開口穴２２とからなり，上端開口穴２１と下端開口穴２２とは穴開口断面方向に互いに異なる位置に設けてある。上端開口穴２１と下端開口穴２２とは隣接して配置され，両者はその側壁２１１，２２１に開口する繋ぎ穴２３を通じて連通している。下端開口穴２２の上部には上記水抜穴１が連結している。
【００２９】
図１，図４に示すごとく，蓋部７は，その下面に容器本体６の凸条部６１に嵌合する溝状の嵌合窪み部７２を有する。嵌合窪み部７２と蓋部７の上面との間には連通穴４を有する。連通穴４は，図５に示すごとく，凸条部６１の横通水路３に開口して，容器本体６の通水路２に水が流れるようにしてある。
【００３０】
図３，図６に示すごとく，容器本体６は，その凸条部６１と他の容器本体６の凹条部６２とを嵌合して，容器本体６を同方向に複数積み重ねたとき，即ち棒積みしたとき，各容器本体６の水抜穴１から排出された水が，各容器本体６の通水路２を経て最下段の容器本体６の通水路２の下端から排出される。
【００３１】
また，図７に示すごとく，容器本体６は，それぞれその上部に蓋部７を重ね合わせ，容器本体６と蓋部７とを１ユニット５として，複数のユニット５を同方向に複数重ね合わせたとき，また，図８に示すごとく，複数のユニット５を縦横互い違いの向きに配置して複数重ねあわせたときのいずれの場合にも，図５に示すごとく，各容器本体６の水抜穴１から排出された水が各ユニット５における蓋部７の連通部７１１及び連通穴４並びに容器本体６の横通水路３及び通水路２を通じて最下段の容器本体６の通水路２の下端から排出される。
【００３２】
容器本体６は，図９，図１０に示すごとく，長方形状であり，その短辺部６６に２つずつ水抜穴１及び通水路２が設けられている。短辺部６６に設けられた２つの水抜穴１及び通水路２の間には，容器外側壁面が窪み容器内壁面が膨らんだ把持部６８が設けられている。容器本体６の凸条部６１及び凹条部６２は，容器本体６の側壁６０の上端及び下端に連続して形成されている。
図１０に示すごとく，容器本体６の容器外側底部のコーナー部には，凹条部６２の内側に，脚部６７が突出している。
【００３３】
図１１に示すごとく，蓋部７の上面周縁には，枠状凸部７１が設けられている。枠状凸部７１の短辺部７６には，隣合う連通穴４を連結する横連通部７１１が設けられている。この横連通部７１１には，図４に示すごとく，その上に他の容器本体６を積み重ねたときに他の容器本体６の通水路２の下端が開口していて，この通水路２から排出された水は，横連通部７１１を通じて連通穴４に流れ落ちる。
図１２に示すごとく，蓋部７の下面周縁には，容器本体６の凸条部６１と嵌合する嵌合窪み部７２が設けられている。この嵌合窪み部７２には，連通穴４の下端が開口している。
【００３４】
本例の保冷容器の寸法関係について説明する。
図１に示すごとく，水抜穴１は，容器内底面６５よりも１５ｍｍの高さＨの位置に開口している。水抜穴１は，容器内底面６５に沿って横長形状をしており，その長さは１５ｍｍであり，幅は３ｍｍであって開口面積は４５ｍｍ^２である。
容器本体６の側壁上端に開口する通水路２は，四角形状に開口しており，その長さは７ｍｍ，その幅は５ｍｍであって，開口面積は３５ｍｍ^２である。容器本体６の側壁下端に開口する通水路２は，四角形状に開口しており，その長さは１０ｍｍ，その幅は７ｍｍであって，開口面積は７０ｍｍ^２である。
通水路２を構成する上端開口穴２１と下端開口穴２２は，繋ぎ穴２３により連結されており，繋ぎ穴２３は四角形に開口している。繋ぎ穴２３の長さは５ｍｍであり，幅は４ｍｍである。
側壁上端の凸条部６１を切り欠いて形成された横通水路３の深さは３ｍｍである。
蓋部７の連通穴４は，その上面の枠状凸部７１と下面の嵌合窪み部７２に開口しており，その開口部はいずれも四角形で，開口面積は３６ｍｍ^２である。
【００３５】
本例の保冷容器は，容器本体６と蓋部７とを別個に成型する。それぞれ，上型と下型の間の成型用キャビティに，ポリスチレン系，ポリプロピレン系などの予備発泡粒子を充填し，型締め後，加熱して予備発泡粒子を発泡させて成型する。
【００３６】
本例の保冷容器においては，図１，図１３に示すごとく，容器本体６の側壁６０に水抜穴１が開口している。水抜穴１は側壁６０内の通水路２と連結している。このため，容器本体６内に入れた氷８が溶けて水が溜まってくると，その水８１は水抜穴１及び通水路２を通じて容器外側に排出される。このため，氷の上の生鮮食品が水につからず，品質劣化を抑制できる。
【００３７】
通水路２は，側壁６０の上端から下端まで連通しているため，水８１は通水路２の下端から容器外側底部に排出される。また，図３に示すごとく，通水路２の上端において，上に積み重ねた他の容器本体６から流れ出た水を受けて，通水路２を通じて下の容器本体６の容器外側底部に排出する。
【００３８】
また，容器本体６の上端には，通水路２と連結する横通水路３が設けられている。この横通水路３には，上側に他の容器本体６を積み重ねたときに，他の容器本体６の通水路２の下端が開口するとともに，蓋部７を嵌め込んだときには，蓋部７の連通穴４の下端が開口する。このため，図３に示すごとく容器本体６を複数積み重ねたとき，及び図４に示すごとく容器本体６と蓋部７とを１ユニット５として複数ユニット積み重ねたときのいずれの場合にも，上側の容器本体６との間から水が外側壁面に排出することを防止できる。また，容器本体６と蓋部７との間から水が外側壁面に排出されることも防止できる。このため，作業員の手が水で濡れず，作業性が低下するおそれがない。
【００３９】
また，本例においては，図１に示すごとく，水抜穴１は，容器内底面６５よりも上部の側壁６０に開口している。このため，水の一部が容器内底部に残りながら，水抜穴１の高さに到達した水８１が水抜穴１から排出される。このため，容器内底部に所定量の冷水が溜まり，氷の溶解を抑制する。したがって，本例の保冷容器は，保冷力が高い。
【００４０】
（実施例２）
本例の保冷容器においては，図１４に示すごとく，容器本体６の側壁下端が段状窪み部６２２であり，側壁上端が平面部６１２である。段状窪み部６２２には，他の容器本体６の側壁上端の平面部６１２全体が嵌め込まれる。段状窪み部６２２の底面６２３は，平面部６１２と当接する当接部である。
また，蓋部７の下面には，容器本体６の側壁上端と嵌合する段状の嵌合窪み部７２２が形成されている。
上記平面部６１１および段状窪み部６２１には，通水路２が開口している。
その他は，実施例１と同様である。
【００４１】
本例においては，通水路２が，上記平面部６１２および段状窪み部６２２に開口しているため，容器本体を積み重ねたときに容器本体間から水が排出されることを抑制できる。その他，本例においても実施例１と同様の効果を得ることが出来る。
【００４２】
（実施例３）
本例の保冷容器においては，図１５に示すごとく，水抜穴１，通水路２及び横通水路３が容器本体６の４つのコーナー部６０５に形成されている。このため，容器本体６の側壁６０の強度を維持できる。
その他の点は実施例１と同様である。
【図面の簡単な説明】
【図１】実施例１における，図４のＡ−Ａ線に沿った，保冷容器の一部切欠斜視図。
【図２】実施例１における，図４のＢ−Ｂ線に沿った，保冷容器の一部切欠斜視図。
【図３】実施例１における，上側に他の容器本体を積み重ねたときの容器本体の断面図。
【図４】実施例１における，容器本体及び蓋部を１ユニットとして複数ユニット積み重ねたときの，容器本体及び蓋部の断面図。
【図５】実施例１における，容器本体と蓋部の要部断面図。
【図６】実施例１における，複数積み重ねた容器本体の正面図。
【図７】実施例１における，容器本体及び蓋部を１ユニットとして複数積み重ねたときの，容器本体及び蓋部の正面図。
【図８】実施例１における，容器本体及び蓋部を１ユニットとして縦横互い違いに複数積み重ねたときの，容器本体及び蓋部の平面図（Ａ）及び正面図（Ｂ）。
【図９】実施例１における，上側からみた容器本体の斜視図。
【図１０】実施例１における，下側からみた容器本体の斜視図。
【図１１】実施例１における，上側からみた蓋部の斜視図。
【図１２】実施例１における，下側からみた蓋部の斜視図。
【図１３】実施例１における，容器内に氷を入れたときの保冷容器の断面図。
【図１４】実施例２における，保冷容器の一部切欠斜視図。
【図１５】実施例３における，保冷容器の一部切欠斜視図。
【図１６】従来例における，容器内の氷が解けたときの状態を示す保冷容器の一部切欠斜視図。
【符号の説明】
１．．．水抜穴，
２．．．通水路，
２１．．．上端開口穴，
２２．．．下端開口穴，
３．．．横通水路，
４．．．連通穴，
５．．．ユニット，
６．．．容器本体，
６０．．．側壁，
６１．．．凸条部，
６２．．．凹条部，
７．．．蓋部，
７１．．．枠状凸部，
７２．．．嵌合窪み部，
８．．．氷，
８１．．．水，[0001]
【Technical field】
The present invention relates to a cold container for keeping fresh food or the like by putting ice.
[0002]
[Prior art]
Foamed resin containers are often used as cold containers for keeping fresh food in ice. Such a cold storage container includes, for example, a container main body 96 and a lid 97 as shown in FIG. The container main body 96 is filled with ice 98, and fresh food such as fish, squid, octopus, and shellfish is placed thereon.
By the way, in the said conventional cold storage container, the ice 98 in the container main body 96 may melt | dissolve and the inside of a container may be filled with the water 981. FIG. In this case, the fresh food 95 in the container is immersed in the water 981, and the quality of the fresh food 95 is deteriorated. In addition, the water 981 in the container spills from between the container main body 96 and the lid portion 97 during transportation, causing a problem that transportation workability is deteriorated by sliding an operator's hand.
Therefore, conventionally, a container 91 is provided with a discharge hole 91 in the container bottom portion 90 of the container body 96, and a container hole 96 is provided in the container body 96 and the lid 97 so that the discharge hole 91 and the container hole 92 are connected to each other. A technique for discharging the water 981 from the discharge hole 91 and the pit hole 92 to the outside of the container is disclosed (actual registration No. 3057224, Japanese Patent Laid-Open No. 2000-264375).
[0003]
[Problems to be solved]
However, the cooling power in the cold storage container is larger when ice and water are mixed than when ice alone is used.
On the other hand, since the conventional discharge hole 91 is provided in the container bottom 90, all the water in the container is discharged. For this reason, in the said conventional cold storage container, the cold insulation power is weak.
[0004]
In view of such conventional problems, the present invention intends to provide a cold storage container that suppresses quality deterioration of fresh food, has good transportability, and has a high cold storage capacity.
[0005]
[Means for solving problems]
The present invention relates to a cold insulated container made of foamed resin comprising a container body and a lid,
The side wall of the container body is provided with a drain hole that opens above the bottom surface of the container,
The drain hole is connected to a water passage formed in the side wall of the container body,
The water channel communicates from the upper end to the lower end of the side wall ,
Further, the upper end of the side wall of the container main body is provided with a lateral water passage that is partially cut away from the upper end of the side wall.
Transverse water passage, when stacked with other container body on the container body, characterized in that it is configured to connect the above water passage of the water conduit and the container body of the other of the container body (Claim 1).
[0006]
In the cold storage container of the present invention, a drain hole is formed in the side wall of the container body, and the drain hole is connected to a water passage in the side wall. For this reason, when the ice put in the container melts and the water accumulates, the water is discharged outside the container through the drain hole and the water passage. For this reason, fresh food on ice is not immersed in water, and quality deterioration can be suppressed.
In addition, since the water passage communicates from the upper end to the lower end of the side wall of the container body, water is discharged from the lower end of the water passage to the bottom of the container outside. In addition, water flowing out from the other container body stacked on top flows down to the upper end of the water passage and is discharged to the bottom outside the container through the water passage. For this reason, the worker's hand does not get wet with water, and there is no possibility that the transport workability is deteriorated.
[0007]
In the present invention, the drain hole is opened on the side wall of the container above the bottom surface inside the container. For this reason, water that has reached the height of the drain hole is discharged from the drain hole while a part of the water remains in the bottom of the container. For this reason, a predetermined amount of cold water accumulates at the bottom of the container, which suppresses melting of ice. Therefore, the cold insulation container of the present invention has a high cold insulation power.
In addition, a lateral water passage with a part of the upper end of the side wall cut out is provided at the upper end of the side wall of the container main body, and the horizontal water passage is formed by stacking another container main body on the container main body. At this time, the water passage of the other container body and the water passage of the container body are connected to each other.
For this reason, a horizontal water passage that connects the water passages between the container main body and another container main body on the container main body is disposed. Therefore, it is possible to prevent water from being discharged from between the container main body and another container main body to the container outer side wall, thereby improving the transport workability.
[0008]
As described above, according to the present invention, it is possible to provide a cold storage container that suppresses quality degradation of fresh food, has good workability, and has a high cold storage power.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In this invention, it is preferable that the said drain hole is opened to the height of 1-30 mm from the container inner bottom face of the said container main body. If it is less than 1 mm, the amount of ice dissolved water remaining in the container is small, and the cold insulation power may be weakened. On the other hand, when it exceeds 30 mm, the amount of dissolved ice water in the container is too much, and there is a risk that the quality may deteriorate due to water touching fresh food.
Furthermore, it is desirable that the drain hole is opened at a height of 5 to 25 mm from the inner bottom surface of the container body.
Draining hole is preferably opening area open to the oblong shape along it and container bottom is 10mm ^² ~120mm ^2. Thereby, the discharge property of the excess water in the container is further improved.
[0010]
It is preferable that the opening area of the water passage opening at the upper end of the side wall of the container body is 28 to 50 mm ² . This is because water from the water passage of the upper container body can easily flow.
Moreover, it is preferable that the magnitude | size of the opening cross section of the water flow path of the lower end part of a side wall is 10-20 mm in length, and 5-12 mm in width. This is because it is easy to pour water into the water passage of the lower container body.
The opening cross-sectional shape of the water channel that opens to the upper end of the side wall and the lower end of the side wall is preferably a quadrilateral, semicircular, circular, or a partially cutout shape of a circle. This is because molding is easy.
[0011]
The outer bottom surface of the side wall of the container body has a contact portion that contacts the upper end of the side wall of the other container body when another container body is stacked thereunder. It is preferable that the upper end portion communicates with the contact portion. When a plurality of container bodies are stacked and the abutting part comes into contact with the upper end of another container body below, the abutting part of the upper container body and the upper end of the side wall of the other lower container body Are in contact with each other. By opening the water passage at such a contact portion, when the container main body is stacked, water flows from the upper water passage into the lower water passage. For this reason, it can prevent that the water which came out of the water channel of the upper container main body dripped down into the lower container main body along the bottom face of the upper container main body, and can suppress the quality deterioration of fresh food. In addition, water discharge from the space between the upper and lower container bodies to the outside is reduced, improving transportability.
[0012]
The lower end of the side wall of the container main body has a concave ridge, a stepped depression, etc., and its bottom surface serves as the abutting portion. The upper end portion of the side wall of the container body has a shape that matches the shape of the lower end portion of the side wall, or a shape that can be fitted with a predetermined gap. The upper end portion of the side wall having such a shape is in contact with the bottom surface of the lower end portion of the side wall on the upper surface.
[0013]
In the present invention, the upper end of the side wall of the container main body is provided with a lateral water passage that is partially cut away from the upper end of the side wall. when a stack of container body, that is configured to connect the above water passage of the water conduit and the container body of the other of the container body.
Therefore, from between the container body and the other of the container body, it is possible to prevent the water discharged to the container outer sidewall, transportation workability is improved.
It is preferable that the depth of the said horizontal water channel is 2-3 mm. This is because the flow of water from the water channel of the other upper container body to the water channel of the lower container body can be secured while maintaining the strength of the container body.
[0014]
On the other hand, when another container body is stacked on the container body, the upper end opening of the water passage of the container body and the lower end opening of the water passage of the other container body are opened at the same position. There is a case. In this case, water flows directly from the water channel of the other upper container body to the water channel of the lower container body.
[0015]
The drain hole, the water passage, and the horizontal water passage may be provided at any position on the side wall of the container body. From the viewpoint of the strength of the container body, it is preferably provided at the corner of the side wall.
[0016]
The water passage is composed of an upper end opening hole opened at the upper end of the side wall of the container body and a lower end opening hole opened at the lower end of the side wall. The upper end opening hole and the lower end opening hole are in the hole opening cross-sectional direction. is provided with positions different from each other, it is preferable that the above top opening hole and the lower end opening hole communicates inside of the side wall of the container body (claim 3). As a result, the air flow in the water passage is stagnated, the influence of the outside air temperature inside the container can be suppressed, and the cold insulation is further enhanced.
[0017]
The upper end opening hole and the lower end opening hole only need to be provided at different positions in the hole opening cross-sectional direction. For example, the center axis of the upper end opening hole and the center axis of the lower end opening hole are shifted from each other. Specifically, 1) When the upper end opening hole and the lower end opening hole are arranged apart from each other and communicate with each other by a connecting hole connected to the bottom or side wall thereof, 2) What is the upper end opening hole and the lower end opening hole? When the two are arranged adjacent to each other and communicate with each other through a connecting hole that opens to the side wall, 3) the upper end opening hole and the lower end opening hole are arranged so that a part of the bottom thereof overlaps, and both are overlapped with the overlapping portion of the bottom. There may be a case where communication is made through an opening connecting hole. Among these, the above 2) is preferable. This is because air is likely to stagnate in the water channel, and it is easy to mold the water channel.
The opening cross section of the connecting hole is a quadrangle, preferably 3 to 10 mm in length and 3 to 10 mm in width. It becomes easy to guide the water flowing into the upper end opening hole to the lower end opening hole. The opening cross-sectional shape of the connecting hole may be a circle, a semicircle, a partially cutout circle, or the like.
[0018]
It is preferable that the lid portion has a fitting recess portion fitted to the upper end portion of the side wall of the container main body on the lower surface thereof and a communication hole between the fitting recess portion and the upper surface of the lid portion. (Claim 4 ). Thereby, when fitting a cover part with a container main body, the water channel which consists of a communicating hole and a water channel is ensured.
The opening area of the communication hole of the lid part is preferably 20 to 50 mm ² . The flow of water in the waterway is improved.
As the shape of the opening cross section of the communication hole, a quadrangle, a circle, a semicircle, a partially cut circle, or the like can be used.
[0019]
The aforementioned connecting throughbore is preferably in the water passage of the container body are arranged so as water flows (claims 5). Thereby, it can suppress that water drains from between a container main body and a cover part to a container outer wall surface, and conveyance workability | operativity improves.
[0020]
Specifically, for example, the aforementioned connecting throughbore of the cap portion is preferably open to the Yokodori waterways of the side wall upper portion (claim 6). If the water passage in the container body and the communication hole in the lid part are opened at different positions, the water passage is restricted to prevent the water from being discharged from the space between the container body and the lid part. A water channel connecting the water channel and the communication hole is required. By using the horizontal water channel as such a water channel, the water flowing out from the communication hole of the lid can be guided to the water channel through the horizontal water channel of the container main body without being discharged to the outside of the container.
[0021]
Further, for example, the lower end of the communication hole of the lid portion and the upper end of the water passage of the container body may be opened at the same position. Thereby, water is directly introduced into the water passage of the container body from the communication hole of the lid.
[0022]
When a plurality of container bodies are stacked, the water discharged from the drain holes of each container body is discharged from the lower end of the water passage of the lowermost container body through the water passages of each container body. It is preferable to be configured (claim 7 ). In this case, when a plurality of container bodies are stacked with the upper end of the side wall of the container body and the contact part of the other container body abutting, the water in the container body passes through the drain hole and the water passage, It is discharged from the lower end of the water channel of the lowermost container body. Therefore, the discharge of water from between the stacked container bodies to the external wall surface is suppressed, and the transport workability is improved.
Specifically, for example, for all the container bodies to be stacked, 1) a lateral passage connected to the upper end of the side wall with the upper end of the water passage and to the lower end of the water passage of another container body stacked on the upper side. 2) Open the upper and lower ends of the waterway at the same position.
[0023]
Each of the container main bodies overlaps the lid part on the upper part of the container main body, and the container main body and the lid part constitute one unit, and when a plurality of units are overlapped, the water discharged from the drain hole of each container main body. Is preferably discharged from the lower end of the water passage of the lowermost container body through the communication hole of the lid portion and the water passage of the container body in each unit (Claim 8 ). In this case, when a plurality of container bodies and lids are stacked as one unit, the water in the container body passes through the drain holes and water passages of the container body and the communication holes of the lid part, and It is discharged from the lower end of the water channel. Accordingly, water is prevented from being discharged to the external wall surface between the stacked container main body and the lid portion, and transport workability is improved.
[0024]
Specifically, for example, for all container bodies and lids, 1) a lateral water passage is provided between the lower end of the communication hole of the lid part and the upper end of the water passage of the container body below the container body, and the container body A horizontal communication passage is provided between the lower end of the water passage and the upper end of the communication hole of the other lid portion below the water passage. 2) The upper and lower ends of the water passage and the upper and lower ends of the communication hole are opened at the same position.
[0025]
【Example】
Example 1
The cold insulation container which concerns on embodiment of this invention is demonstrated using FIGS.
In this example, as shown in FIG. 1, a cold insulated container made of foamed resin including a container main body 6 and a lid portion 7. The container body 6 has a ridge 61 at the upper end of the side wall 60. On the outer bottom surface of the container main body 6, there is a concave stripe portion 62 that fits into the convex stripe portion of the container main body of another cold storage container. The bottom surface 621 of the concave strip portion 62 is a contact portion that contacts the top surface 611 of the convex strip portion 61.
[0026]
As shown in FIGS. 1 and 2, a drain hole 1 is opened on the side wall 60 of the container body 6 above the bottom surface 65 in the container. The drain hole 1 is connected to a water passage 2 formed in the side wall 60 of the container body 6. The water passage 2 communicates from the upper surface 611 of the convex strip portion 61 at the upper end of the side wall 60 to the bottom surface 621 of the concave strip portion 62 at the lower end.
[0027]
At the upper end of the side wall 60 of the container body 6, a horizontal water passage 3 in which a part of the ridge 61 is cut out is provided. As shown in FIG. 3, the horizontal water passage 3 has a water passage 2 of the other upper container body 6 and a water passage 2 of the lower container body 6 when another container body 6 is stacked on the container body 6. Are connected to each other.
[0028]
As shown in FIGS. 1 and 2, the water passage 2 is composed of an upper end opening hole 21 that opens at the upper end of the side wall 60 and a lower end opening hole 22 that opens at the lower end of the side wall 60. 22 is provided at a position different from each other in the hole opening cross-sectional direction. The upper end opening hole 21 and the lower end opening hole 22 are disposed adjacent to each other, and both communicate with each other through a connecting hole 23 that opens to the side walls 211 and 221. The drain hole 1 is connected to the upper part of the lower end opening hole 22.
[0029]
As shown in FIGS. 1 and 4, the lid portion 7 has a groove-like fitting recess 72 that fits into the convex portion 61 of the container body 6 on the lower surface thereof. A communication hole 4 is provided between the fitting recess 72 and the upper surface of the lid 7. As shown in FIG. 5, the communication hole 4 opens in the horizontal water passage 3 of the ridge 61 and allows water to flow through the water passage 2 of the container body 6.
[0030]
As shown in FIGS. 3 and 6, the container body 6 has a plurality of container bodies 6 stacked in the same direction by fitting the protrusions 61 and the recesses 62 of another container body 6, that is, When stacked, the water discharged from the drain hole 1 of each container body 6 is discharged from the lower end of the water passage 2 of the lowermost container body 6 through the water passage 2 of each container body 6.
[0031]
Further, as shown in FIG. 7, the container body 6 has a lid portion 7 superimposed on each of the container body 6, the container body 6 and the lid portion 7 are set as one unit 5, and a plurality of units 5 are stacked in the same direction. In addition, as shown in FIG. 8, in any case where a plurality of units 5 are arranged in a staggered orientation in the vertical and horizontal directions and overlapped with each other, as shown in FIG. 5, as shown in FIG. The discharged water is discharged from the lower end of the water passage 2 of the lowermost container body 6 through the communication portion 711 and the communication hole 4 of the lid portion 7 and the horizontal water passage 3 and the water passage 2 of the container body 6 in each unit 5. .
[0032]
As shown in FIGS. 9 and 10, the container body 6 has a rectangular shape, and two drain holes 1 and two water passages 2 are provided in the short side portion 66. Between the two drain holes 1 and the water passage 2 provided in the short side portion 66, a grip portion 68 in which the outer wall surface of the container is depressed and the inner wall surface of the container is swelled is provided. The ridges 61 and the dents 62 of the container body 6 are formed continuously at the upper and lower ends of the side wall 60 of the container body 6.
As shown in FIG. 10, a leg portion 67 protrudes inside the recessed strip portion 62 at the corner portion of the container outer bottom portion of the container body 6.
[0033]
As shown in FIG. 11, a frame-shaped convex portion 71 is provided on the periphery of the upper surface of the lid portion 7. The short side portion 76 of the frame-like convex portion 71 is provided with a lateral communication portion 711 that connects adjacent communication holes 4. As shown in FIG. 4, when the other container body 6 is stacked on the horizontal communication portion 711, the lower end of the water passage 2 of the other container body 6 is opened and discharged from the water passage 2. The discharged water flows down to the communication hole 4 through the horizontal communication part 711.
As shown in FIG. 12, a fitting recess 72 that fits with the convex strip 61 of the container body 6 is provided on the periphery of the lower surface of the lid 7. In the fitting recess 72, the lower end of the communication hole 4 is opened.
[0034]
The dimensional relationship of the cold insulating container of this example will be described.
As shown in FIG. 1, the drain hole 1 is opened at a position of a height H of 15 mm from the bottom surface 65 in the container. The drain hole 1 has a horizontally long shape along the inner bottom surface 65 of the container, the length is 15 mm, the width is 3 mm, and the opening area is 45 mm ² .
The water passage 2 opened at the upper end of the side wall of the container body 6 is opened in a square shape, the length is 7 mm, the width is 5 mm, and the opening area is 35 mm ² . The water passage 2 opened at the lower end of the side wall of the container body 6 is opened in a square shape, the length is 10 mm, the width is 7 mm, and the opening area is 70 mm ² .
The upper end opening hole 21 and the lower end opening hole 22 constituting the water passage 2 are connected by a connecting hole 23, and the connecting hole 23 is opened in a square shape. The connecting hole 23 has a length of 5 mm and a width of 4 mm.
The depth of the horizontal water passage 3 formed by cutting out the protruding strip portion 61 at the upper end of the side wall is 3 mm.
The communication hole 4 of the lid portion 7 opens to a frame-like convex portion 71 on the upper surface and a fitting recess portion 72 on the lower surface, both of which are quadrangular and have an opening area of 36 mm ² .
[0035]
In the cold storage container of this example, the container body 6 and the lid part 7 are molded separately. Each of the molding cavities between the upper mold and the lower mold is filled with pre-expanded particles such as polystyrene and polypropylene, and after mold clamping, the pre-expanded particles are expanded by foaming and molded.
[0036]
In the cold storage container of this example, as shown in FIGS. 1 and 13, the drain hole 1 is opened in the side wall 60 of the container body 6. The drain hole 1 is connected to the water passage 2 in the side wall 60. For this reason, when the ice 8 put in the container body 6 melts and the water accumulates, the water 81 is discharged to the outside of the container through the drain hole 1 and the water passage 2. For this reason, fresh food on ice is not exposed to water and quality deterioration can be suppressed.
[0037]
Since the water passage 2 communicates from the upper end to the lower end of the side wall 60, the water 81 is discharged from the lower end of the water passage 2 to the container outer bottom. Further, as shown in FIG. 3, at the upper end of the water passage 2, water flowing out from the other container main body 6 stacked above is received and discharged through the water passage 2 to the container outer bottom of the lower container main body 6.
[0038]
In addition, a horizontal water passage 3 connected to the water passage 2 is provided at the upper end of the container body 6. When the other container main body 6 is stacked on the upper side of the horizontal water passage 3, the lower end of the water passage 2 of the other container main body 6 is opened, and when the lid portion 7 is fitted, The lower end of the communication hole 4 opens. Therefore, in both cases when a plurality of container bodies 6 are stacked as shown in FIG. 3 and when a plurality of units are stacked with the container body 6 and the lid 7 as one unit 5 as shown in FIG. It is possible to prevent water from being discharged from between the container body 6 and the outer wall surface. Further, it is possible to prevent water from being discharged from between the container body 6 and the lid portion 7 to the outer wall surface. For this reason, the operator's hand does not get wet with water, and workability does not deteriorate.
[0039]
Further, in this example, as shown in FIG. 1, the drain hole 1 opens in the side wall 60 above the bottom surface 65 in the container. For this reason, the water 81 that has reached the height of the drain hole 1 is discharged from the drain hole 1 while a part of the water remains in the bottom of the container. For this reason, a predetermined amount of cold water accumulates at the bottom of the container, which suppresses melting of ice. Therefore, the cold storage container of this example has a high cooling capacity.
[0040]
(Example 2)
In the cold storage container of this example, as shown in FIG. 14, the lower end of the side wall of the container body 6 is a stepped recess 622, and the upper end of the side wall is a flat portion 612. The entire flat portion 612 at the upper end of the side wall of the other container body 6 is fitted into the stepped recess 622. A bottom surface 623 of the stepped recess 622 is a contact portion that contacts the flat surface portion 612.
Further, a stepped fitting recess 722 that fits with the upper end of the side wall of the container body 6 is formed on the lower surface of the lid portion 7.
The water passage 2 is opened in the flat portion 611 and the stepped depression 621.
Others are the same as in the first embodiment.
[0041]
In this example, since the water flow path 2 is open to the said plane part 612 and the step-shaped hollow part 622, it can suppress that water is discharged | emitted from between container main bodies when a container main body is stacked. In addition, also in this example, the same effect as Example 1 can be acquired.
[0042]
(Example 3)
In the cold storage container of this example, as shown in FIG. 15, the drain hole 1, the water passage 2 and the horizontal water passage 3 are formed at the four corner portions 605 of the container body 6. For this reason, the strength of the side wall 60 of the container body 6 can be maintained.
Other points are the same as in the first embodiment.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view of a cold storage container taken along line AA in FIG.
2 is a partially cutaway perspective view of the cold storage container along the line BB in FIG. 4 in Example 1. FIG.
FIG. 3 is a cross-sectional view of a container main body when another container main body is stacked on the upper side in the first embodiment.
4 is a cross-sectional view of a container main body and a lid when a plurality of units are stacked with the container main body and the lid as one unit in Embodiment 1. FIG.
5 is a cross-sectional view of main parts of a container main body and a lid part in Embodiment 1. FIG.
6 is a front view of a plurality of stacked container bodies in Embodiment 1. FIG.
7 is a front view of the container main body and the lid when a plurality of container main bodies and the lid are stacked as one unit in Embodiment 1. FIG.
FIGS. 8A and 8B are a plan view and a front view of a container body and a lid when a plurality of containers are stacked in a vertical and horizontal direction with the container body and the lid as a unit in the first embodiment.
9 is a perspective view of the container body viewed from the upper side in Embodiment 1. FIG.
10 is a perspective view of the container main body as viewed from the lower side in Embodiment 1. FIG.
FIG. 11 is a perspective view of the lid portion as viewed from the upper side according to the first embodiment.
12 is a perspective view of the lid portion as viewed from the lower side in Embodiment 1. FIG.
13 is a cross-sectional view of the cold storage container when ice is put in the container in Example 1. FIG.
14 is a partially cutaway perspective view of a cold storage container in Example 2. FIG.
15 is a partially cutaway perspective view of a cold storage container in Example 3. FIG.
FIG. 16 is a partially cutaway perspective view of a cold storage container showing a state when ice in the container is melted in the conventional example.
[Explanation of symbols]
1. . . Drain holes,
2. . . Waterway,
21. . . Top opening hole,
22. . . Bottom opening hole,
3. . . Horizontal waterway,
4). . . Communication hole,
5). . . unit,
6). . . Container body,
60. . . Side wall,
61. . . Ridges,
62. . . Concave section,
7). . . Lid,
71. . . Frame-shaped convex part,
72. . . Fitting recess,
8). . . ice,
81. . . water,

Claims

In a cold insulation container made of foamed resin consisting of a container body and a lid,
The side wall of the container body is provided with a drain hole that opens above the bottom surface of the container,
The drain hole is connected to a water passage formed in the side wall of the container body,
The water channel communicates from the upper end to the lower end of the side wall ,
Further, the upper end of the side wall of the container main body is provided with a lateral water passage that is partially cut away from the upper end of the side wall.
The horizontal water passage is configured to connect the water passage of the other container body and the water passage of the container body when another container body is stacked on the container body. Cold storage container.

In claim 1, the outer bottom surface of the side wall of the container body has a contact portion that contacts the upper end of the side wall of the other container body when another container body is stacked thereunder,
The cold water container, wherein the water passage communicates from the upper end of the side wall to the contact portion.

3. The water passage according to claim 1, wherein the water passage includes an upper end opening hole that opens at an upper end of the side wall of the container body, and a lower end opening hole that opens at a lower end of the side wall. Is provided at different positions in the hole opening cross-sectional direction, and the upper end opening hole and the lower end opening hole communicate with each other inside the side wall of the container body .

The lid portion according to any one of claims 1 to 3, wherein the lid portion has a fitting recess portion fitted to the upper end portion of the side wall of the container body on the lower surface thereof, and the fitting recess portion and the upper surface of the lid portion. A cold insulation container characterized by having a communication hole between them .

5. The cold insulating container according to claim 4, wherein the communication hole is arranged so that water flows through the water passage of the container body .

6. The cold insulation container according to claim 5, wherein the communication hole of the lid portion is open to the horizontal water passage at the upper end portion of the side wall of the container body .

In any 1 item | term of the said container main body, when the said container main body piles up a plurality of container main bodies, the water discharged | emitted from the drain hole of each container main body passes through the said water flow path of each container main body, and is the lowest step. A cold-insulated container configured to be discharged from the lower end of the water passage of the container body .

In any one of Claims 1-6, when the said container main body overlaps the said cover part on the upper part respectively, this container main body and the said cover part are made into 1 unit, and when several units were overlapped, The water discharged from the drain hole of each container body is configured to be discharged from the lower end of the water passage of the lowermost container body through the communication hole of the lid portion and the water passage of the container body in each unit. cold container, characterized in that.