JP3691406B2

JP3691406B2 - Paper cold box

Info

Publication number: JP3691406B2
Application number: JP2001137608A
Authority: JP
Inventors: 道隆高橋
Original assignee: 有限会社田中紙工
Priority date: 2001-05-08
Filing date: 2001-05-08
Publication date: 2005-09-07
Anticipated expiration: 2021-05-08
Also published as: JP2002332026A

Description

【０００１】
【発明の属する技術分野】
本発明は、魚貝類などの海産物、その他の野菜や果実などの各種生鮮物の運搬、保管などに用いる紙製保冷箱に係り、詳しくは段ボール紙や厚紙などの紙製板材からなる簡易組立て型の紙製保冷箱に関する。
【０００２】
【従来の技術】
魚貝類などの海産物を搬送する際の鮮度保持や、保管時の積み上げ荷重、運搬時等の落下衝撃等から保護するための保冷箱として、ウレタンフォームや発泡スチロール等からなる合成樹脂製保冷箱が幅広く用いられている。
【０００３】
この合成樹脂製保冷箱は、保冷性、耐強度、耐久性、そして衝撃吸収性などに優れている反面、使用後の処理に際して環境に対する悪影響などが懸念され、又、リサイクルが困難である等の理由から、現在ではその使用が制限される傾向にある。
そこで、この合成樹脂製保冷箱に替わるものとして、段ボール紙などにより組み立てられる紙製保冷箱が提案されている。
【０００４】
【発明が解決しようとする課題】
しかし乍ら、この紙製保冷箱は、前述の合成樹脂製保冷箱に比べると保冷能力、耐久性、そして衝撃吸収性などの面において劣り、実用に満足な効果が得らていない。例えば実開昭５５-１７３４８８号公報等において知られているように、二層壁構造の内面板と外面板との間の隙間に保冷、補強のための発泡スチロールを充填するなどの手段が採られていた。
【０００５】
本発明はこの様な従来事情に鑑みてなされたもので、その目的とする処は、合成樹脂製保冷箱と同程度の保冷機能、耐強度、耐久性に優れ、そして衝撃吸収性、積圧強度においても優れ、更には魚貝類などの海産物等と共に収容される氷が解けた場合でも水漏れの心配が無い等、特に氷を使用する魚介類等を搬送する際に好適な紙製保冷箱を提供することにある。
【０００６】
【課題を達成するための手段】
課題を達成するために本発明は、請求項１では、耐水性や撥水性などを有する紙製板材からなる一枚のシート基材により折り曲げ組み立てられる箱本体（ａ）と、紙製板材からなる蓋体（ｂ）とで構成され、箱本体（ａ）は、矩形状の底板（２）と、この底板の四辺から立ち上がる外面板（３，４）と、夫々の外面板（３，４）の上端から内側に折れ曲がる上縁板（５，６）と、夫々の上縁板（５，６）の内端から下方へ折れ曲がる内面板（７，８）とを有し、且つ、底板（１）の四隅コーナーにおいて該コーナー部と前後左右の外面板（３，４）の両側端から連設させて内側に折れ曲がる水漏れ防止用連設板（19…）と、前後の内面板（７）の両側端から内側に折れ曲がる補強板（21…）とを有し、それら水漏れ防止用連設板（19…）と補強板（21…）を左右の内外面板（４，８）の間に確保される保冷空間（10）に収容することにより、箱本体（ａ）の強度を保持すると共に水漏れを防止するように形成してなり、
更に、上記前後左右の内面板（７，８）の下縁から上記上縁板（５，６）の幅方向と略同程度の幅にて折れ曲がる挿入片部（ 22 ， 23 ）を設け、この挿入片部（ 22 ， 23 ）を上記底板（２）に沿わせて外側に折り曲げることにより、夫々の内面板（７，８）の下向き折り曲げ状態の保持と、保冷空間（９， 10 ）を前後左右の内外面板（７，３、８，４）と上縁板（５，６）とにより縦断面囲繞状に確保するように形成し、
更にまた、上記前後の内面板（７）とその両側の上記補強板（ 21 …）との境部位に結合部（ 29 ）を設けると共に、左右の内面板（８）の両側端には結合片部（ 30 ）を設け、前後左右の内面板（７，８）を夫々の上縁板（５，６）の内端から下方へ折り曲げた時に前記係合片部（ 30 ）を係合部（ 29 ）に差込み係止させることにより、左右の内面板（７，８）の折り曲げ状態と箱本体（ａ）の組み立て状態とを維持するように形成した紙製保冷箱にある。
【０００７】
斯かる請求項１記載の構成によれば、底板（２）の四辺には前後左右の内外面板（７，３、８，４）により確保された保冷空間（９，10）を有する周囲壁部が形成され、この周囲壁部は、底板（２）の四隅コーナー部を含めて前後左右の外面板（３，４）の幅方向と略同程度の長さにてその両側端から連設する水漏れ防止用連設板（19…）により一連に囲繞された一体壁構造に形成されることにより、保冷機能に優れ、仮に魚貝類などの海産物等と共に収容される氷が解けた場合でも水漏れの心配が無く、しかも、上記保冷空間（９， 10 ）は、前後左右の内外面板（７，３、８，４）と上縁板（５，６）、そして挿入片部（ 22 ， 23 ）とにより縦断面囲繞状に確保形成されることで、水漏れ防止用連設板（ 19 …）と補強板（ 21 …）とにより箱本体（ａ）の積圧強度が強化される。
つまり、保冷空間（９， 10 ）の高さ方向の強度が、同保冷空間の縦断面囲繞構造に加えて同保冷空間に折り曲げ収容された漏れ防止用連設板（ 19 …）と補強板（ 21 …）とによる壁構造により、数個又は数十個を積み上げて保管、運搬する際の箱本体（ａ）の積圧強度が強化されるものである。
また、左右の内面板（８）は、両側端の係合片部（ 30 ）を、前後の内面板（７）の両側端に開口される係合部（ 29 ）に差込み係止させることで、上端板（６）の内縁からの下方への折り曲げ状態が維持され、しかも、前後左右の内面板（７，８）同士が、係合片部（ 30 ）と係合部（ 29 ）との係止連繋によって、底板（２）の四辺方向に一連に繋がる壁構造となることで、箱本体（ａ）の組み立て状態が確実に定形維持されると同時に箱本体（ａ）の積圧強度が更に強化されるものである。
【０００８】
又、請求項２では、前述請求項１記載の補強板（ 21 …）の上縁から上縁板（５，６）の幅方向と略同程度の幅にて外側に折れ曲がる保持片部（ 26 …）を設け、この保持片部（ 26 …）を保冷空間（９， 10 ）に折り曲げ収容させることにより、前記補強板（ 21 …）と共に保冷空間（９， 10 ）を定形維持するように形成した紙製保冷箱にある。
【０００９】
斯かる請求項２記載の構成によれば、補強板（ 21 …）共に保持片部（ 26 …）を保冷空間（ 10 ）に折り曲げ収容することにより、保持片部 26 …は、補強板 21 …及び挿入片部（ 22 ， 23 ）と共に保冷空間（９， 10 ）の特に幅方向を定形維持する。これにより、箱本体（ａ）内に収容される魚貝類などの海産物等によって内面板が外側に膨らむ等の箱崩れを起す心配の無い耐強度、耐久性に優れた壁強化構造の箱本体（ａ）を組み立てることができる。
【００１０】
また、本発明では、上記水漏れ防止用連設板（ 19 …）を、前後左右の外面板（３，４）の幅方向と略同程度の長さにて夫々の外面板に一体に連設し、底板（２）の四隅コーナー部から対角線上に設けた折れ線（ 24 …）から前後左右の外面板（７，８）を折り曲げ立ち上げる際に二つ折りに折畳み重合せしめた状態で、前記保冷空間（ 10 ）に収容するように形成した紙製保冷箱にある（請求項３）。
又、前述の請求項１乃至３何れか 1 項記載の補強板（ 21 …）を、前後の内面板（７）の幅方向と略同程度の幅で且つ左右の内面板（８）の長さ方向の略半分程度の長さにて前後の内面板に連設し、内側に折り曲げられた時に互いに対向し合う対向端（ 21 ａ）同士を突き合わせた状態で、前記保冷空間（ 10 ）に折り曲げ収容するように形成してなることを特徴とする紙製保冷箱にある（請求項４）。
【００１１】
斯かる請求項３及び４に記載の構成によれば、水漏れ防止用連設板（ 19 …）により一連に囲繞された周囲一体壁構造であることによる水漏れ防止に加えて、保冷空間（ 10 ）においては水漏れ防止用連設板（ 19 …）が夫々の対角折れ線（ 24 …）より二つ折りに折畳み重合せしめた状態、又、内面板（７）の幅方向と略同程度の幅を有する補強板（ 21 …）が互いに対向し合う対向端（ 21 ａ）同士を突き合わせた状態で収容されていることより、保冷空間（ 10 ）を確保すると共に、箱本体（ａ）を保持強化する。
つまり、数個又は数十個を積み上げて保管、運搬する際の積圧強度が更に強化され、しかも、耐久性、衝撃吸収性に優れた壁構造を有する箱本体（ａ）を組み立てることができる。
【００１４】
【発明の実施の形態】
本発明の実施の具体例を図面に基づいて説明する。
図１は本発明紙製保冷箱の実施形態の一例を示す箱本体ａの展開図であり、この箱本体ａは紙製板材、例えば耐水性や撥水性などを有する段ボール紙からなるシート基材１を型抜きし、且つ、複数箇所の所要部位に内側、外側に折り曲げる夫々の折れ線を設けることにより形成する。
【００１５】
シート基材１は、図１に示すように、平面矩形状を呈する底板２と、この底板２の四辺夫々の折れ線11，12から立ち上げる前後左右の外面板３，４と、夫々の外面板３，４の上端折れ線13，14から内側に折り曲げる上縁板５，６と、夫々の上縁板５，６の内縁折れ線15，16から下方へ折り曲げり前後左右の外面板３，４との間に保冷空間９，10を確保する前後左右の内面板７，８を有する。
【００１６】
又、シート基材１は、底板２の四隅コーナーにおいて該コーナー部と前後左右の外面板３，４の夫々の両側縁折れ線17，18から連設させて内側に折れ曲がる水漏れ防止用連設板19…と、そして前後の内面板７，８の両側端折れ線20から内側に折れ曲がる補強板21…を有し、それら水漏れ防止用連設板19…と補強板21…を左右の内外面板8，4の間に確保される保冷空間10に収容することにより、箱本体ａの強度を保持すると共に水漏れを防止するように形成してある。
又、シート基材１は、前後左右の内面板７，８の下縁折れ線27，28から前記上縁板５，６の幅方向と略同程度の幅にて折れ曲がる挿入片部22，23を有し、この挿入片部22，23を底板１に沿わせて外側に折り曲げて保冷空間９，10の底部に挿入させることにより、夫々の内面板７，８の下向き折り曲げ状態の保持と、当該保冷空間９，10を内外面板７，３、８，４と上縁板５，６とにより縦断面囲繞状に形成することで、前述の水漏れ防止用連設板19…と補強板21…とにより積圧強度を更に強化する構造としてなる。
【００１７】
水漏れ防止用連設板19…は、底板２の四辺折れ線11，12から一体に立ち上げる前後左右の外面板３，４の両側端を、底板２の四隅コーナー部を含めて一体に連設することにより、箱本体ａ内から外部への水漏れを防ぐ。そして、左右の内外面板８，４の間に確保される保冷空間10に収容されることで、該保冷空間10の高さ方向の強度を強化するものである。
この水漏れ防止用連設板19…は、前後左右の外面板３，４の幅方向と略同程度の長さにて該外面板３，４に連設し、且つ底板２の四隅コーナー部からの対角線上に設けた対角折れ線24…から二つ折りに折畳み重合せしめるように内側に折り曲げることにより、保冷空間10に収容し得るように形成してある。
【００１８】
補強板21…は、左右の内外面板８，４の間に確保される保冷空間10に収容されることで、該保冷空間10の高さ方向の強度を強化（積圧強度を強化）すると同時に箱本体ａの開口短辺方向を左右の内外面板８，４と共に定形維持するものである。
この補強板21…は、前後の内面板７，８の幅方向と略同程度の幅で且つ左右の内面板８の長さ方向の略半分程度の長さにて前後の内面板７に連設し、内側に折り曲げた時に互いに対向し合う対向端21ａ…同士を突き合わせた状態で保冷空間10に収容し得るように形成してある（図６参照）。
又、この補強板21…の上縁折れ線25…から前記上縁板６の幅方向と略同程度の幅にて外側に折れ曲がる保持片部26…を連設し、前記保冷空間10に収容することにより、補強板21…と共に保冷空間10を確保し尚且つ維持し得るように形成してある（図８参照）。
【００１９】
図中29…は、前後の内面板７とその両側の補強板21との境部位、つまり折れ線20に沿わせた一部に前記保冷空間９に抜けるように設けた結合部であり、左右の内面板８の両側端に設けた結合片部30を、前後左右の内面板７，８を夫々の上縁板５，６の内端折れ線15，16から下方へ折り曲げた時に差込み係止（結合）し得るように形成してある。
而して、この様に、前後左右の内面板（７，８）を夫々の上縁板（５，６）の内端から下方へ折り曲げた時に前記係合片部（ 30 ）を係合部（ 29 ）に差込み係止させることにより、前後左右の内面板（７，８）同士が、係合片部（ 30 ）と係合部（ 29 ）との係止連繋によって、底板（２）の四辺方向に一連に繋がる壁構造となることで、箱本体（ａ）の組み立て状態が確実に定形維持されると同時に箱本体（ａ）の積圧強度が更に強化されるものである。
これによって、数個又は数十個を積み上げて保管、運搬する際の積圧強度が更に強化され、しかも、耐久性、衝撃吸収性に優れた壁構造を有する箱本体（ａ）を組み立てることができる。
【００２０】
次に、以上の如く構成したシート基材１を用いた箱本体ａの組立て手順について説明する。
図１に示す展開図の状態から、まず始めに、図２に示すように、前後の内面板７の下縁折れ線27から挿入片部22を折り曲げると共に、同内面板７を上縁板５の内縁折れ線15から折り曲げ、次いで該上縁板５を前後の外面板３の上縁折れ線13から折り曲げた後に、同外面板３を底板２の前後辺折れ線11から折り曲げ立ち上げる。
この時、前後の内面板７の下縁折れ線27から折り曲げた前述の挿入片部22を底板２に沿って前後の内外面板７，３の間に確保される保冷空間９の底部に挿入することにより、前後の内面板７の下向き折り曲がり状態が挿入片部22により維持され、前後の内外面板７，３の間に保冷空間９が確保される（図７参照）。
【００２１】
次に、各補強板21…の上縁折れ線25…から各保持片部26…を外側に折り曲げると共に、各補強板21…を前後の内面板７の両側端折れ線20から内側に折り曲げる。
これにより、図３に示すように、前後の内面板７と補強板21…との折れ線20に沿う底板部位には係合部29が開口すると共に、互いに対向し合う前後の内面板７の両側端折れ線20から内側に折り曲げられた補強板21の対向端21ａ同士が突き合わさった状態となる。
【００２２】
次に、図３に示したように、前後の外面板３の両側端折れ線17から水漏れ防止用連設板19を内側に、対角折れ線24を境に折畳み重合せしめるように折り曲げながら、左右の外面板４を底板２の左右辺折れ線12から折り曲げ立ち上げる。
これにより、前後左右の外面板３，４に連設する水漏れ防止用連設板19は図６及び図７に示すように、同外面板３，４と略同程度の高さにて対角折れ線24から折畳み重合せしめられた状態で、対向端21ａ同士を突き合わせた状態で既に起立存在する前述の補強板21の外側に位置して左右の保冷空間10に収容されるものである。
【００２３】
次に、図４に示したように、左右の内面板８の下縁折れ線28から挿入片部23を折り曲げると共に、左右の外面板４の上端折れ線14から上縁板６を内側に折り曲げ、次いで、該上縁板６の内端折れ線16から左右の内面板８を下方へ折り曲げる。
この時、左右の内面板８の下縁折れ線28から折り曲げた前述の挿入片部23を底板２に沿って補強板21の下縁から左右の内外面板８，４の間に確保される保冷空間10の底部に収容すると共に、当該内面板８の両側端の係合片部30を前後の内面板７の両側端に開口する係合部29を差込み係止させることにより、左右の内外面板８，４の間に保冷空間10が確保されると共に、箱本体ａの組立てが完了する。即ち、左右の内面板８の下向き折り曲がり状態が挿入片部23により維持され、且つ、この状態は内面板８の両側端の係合片部30が前述の係合部29に差込み係止されるその係止力により確実に維持された状態（図６、図７及び図８の状態）で箱本体ａの組立てが完成となる（図５参照）。
【００２４】
尚、前述した箱本体ａの組立て手順は一例にすぎなく、これに限定されるものではない。
【００２５】
蓋体ｂは、箱本体ａの開口部を覆う程度の大きさに前述の耐水性や撥水性などを有する段ボール紙から型抜き形成した蓋部31と、この蓋部31の四辺には箱本体ａの開口部外周縁を被嵌する縁片部32とを有し、又、蓋部31の裏側には箱本体ａの内寸法と略同寸とする前述の段ボール紙を一枚乃至数枚を張り付けることで形成した嵌合部33を有し、この嵌合部33により箱本体ａを密閉状に被蓋し得るように形成してある（図５、図７及び図８の二点鎖線参照）。
尚、図示を省略しているが、この蓋体ｂの蓋部31と嵌合部33との間に保冷空間を確保せしめて、箱本体ａと同様に保冷機能（能力）の向上を図るようにするも勿論自由である。
【００２６】
【発明の効果】
本発明の紙製保冷箱は叙上の如く構成してなることから下記の作用効果を奏する。
請求項１記載の構成により、底板の四辺に保冷空間を有する周囲壁部が形成され、又、この周囲壁部は底板の四隅コーナー部を含めて前後左右の外面板の両側端から連設する水漏れ防止用連設板により一連に囲繞された一体壁構造であることで、保冷機能を有し、仮に魚貝類などの海産物等と共に収容される氷が解けた場合でも水漏れの心配が無く、氷を入れて搬送する魚貝類などの搬送に好適に用いることができ、しかも、上記保冷空間は、前後左右の内外面板と上縁板、そして挿入片部とにより縦断面囲繞状に確保形成されることで、水漏れ防止用連設板と補強板とにより箱本体の積圧強度が強化される。
つまり、保冷空間の高さ方向の強度が、同保冷空間の縦断面囲繞構造に加えて同保冷空間に折り曲げ収容された漏れ防止用連設板と補強板とによる壁構造により、数個又は数十個を積み上げて保管、運搬する際の箱本体の積圧強度が強化されるものである。
また、左右の内面板は、両側端の係合片部を、前後の内面板の両側端に開口される係合部に差込み係止させることで、上端板の内縁からの下方への折り曲げ状態が維持され、しかも、前後左右の内面板同士が、係合片部と係合部との係止連繋によって、底板の四辺方向に一連に繋がる壁構造となることで、箱本体の組み立て状態が確実に定形維持されると同時に箱本体の積圧強度が更に強化されるものである。
【００２７】
又、請求項２記載の構成により、前述の請求項１記載の作用に加えて、補強板（ 21 …）共に保持片部を保冷空間に折り曲げ収容することにより、保持片部は、補強板 21 …及び挿入片部と共に保冷空間の特に幅方向を定形維持する。これにより、箱本体内に収容される魚貝類などの海産物等によって内面板が外側に膨らむ等の箱崩れを起す心配の無い耐強度、耐久性に優れた壁強化構造の箱本体を組み立てることができる。
【００２８】
また、請求項３及び請求項４記載の構成により、前述の請求項１及び２記載の作用に加えて、水漏れ防止用連設板が夫々の対角折れ線より二つ折りに折畳み重合せしめた状態、又、補強板が互いに対向し合う対向端同士を突き合わせた状態で収容されていることで、保冷空間を確実に確保すると共に、箱本体を保持強化し得る。つまり、数個又は数十個を積み上げて保管、運搬する際の積圧強度が強化され、しかも、耐久性、衝撃吸収性に優れた壁構造を有する箱本体を組み立てることができる。
また、前後の内外面板と上縁板、そして挿入片部とにより保冷空間が縦断面囲繞状に確保されるので、前述の水漏れ防止用連設板と補強板とにより保冷空間の確保と箱本体の積圧強度を更に強化し得る。
つまり、数個又は数十個を積み上げて保管、運搬する際の積圧強度が更に強化され、しかも、耐久性、衝撃吸収性に優れた壁構造を有する箱本体（ａ）を組み立てることができる。
【図面の簡単な説明】
【図１】本発明紙製保冷箱の実施形態の一例を示す箱本体の展開斜視図
【図２】箱本体の組立て手順を示す同斜視図
【図３】箱本体の組立て手順を示す同斜視図
【図４】箱本体の組立て手順を示す同斜視図
【図５】組立てが完了した箱本体、そして蓋体を示す斜視図
【図６】箱本体の一部を拡大して示す横断平面図
【図７】一部を更に切欠して示す同縦断側面図
【図８】一部を示す同縦断正面図
【符号の説明】
ａ：箱本体１：シート基材
２：底板３，４：外面板
５，６：上縁板７，８：内面板
９，10：保冷空間 19…：水漏れ防止用連設板
21…：補強板 21ａ：対向端
22，23：挿入片部 26…：保持片部
29：係合部 30：係合片部
ｂ：蓋体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper cold box used for transporting and storing marine products such as fish and shellfish and other fresh products such as vegetables and fruits, and more specifically, a simple assembly type comprising a paper board material such as corrugated paper or cardboard. Related to the paper cold box.
[0002]
[Prior art]
Synthetic resin cold storage boxes made of urethane foam, polystyrene foam, etc. are widely used as cold storage boxes to protect freshness when transporting marine products such as fish and shellfish, stacking loads during storage, and drop impacts during transportation. It is used.
[0003]
This synthetic resin cold box is excellent in cold insulation, strength, durability, shock absorption, etc., but there are concerns about adverse effects on the environment during processing after use, and it is difficult to recycle. For this reason, their use tends to be limited at present.
Thus, as an alternative to the synthetic resin cold box, a paper cold box assembled with corrugated paper or the like has been proposed.
[0004]
[Problems to be solved by the invention]
However, this paper cold box is inferior to the above-mentioned synthetic resin cold box in terms of cold holding capacity, durability, shock absorption and the like, and has not obtained a satisfactory effect for practical use. For example, as known in Japanese Utility Model Laid-Open No. 55-173488, etc., measures such as filling the gap between the inner surface plate and the outer surface plate of the two-layer wall structure with expanded polystyrene for cooling and reinforcement are taken. It was.
[0005]
The present invention has been made in view of such conventional circumstances, and its intended treatment is the same level of cold insulation function, strength resistance, and durability as that of a synthetic resin cold box, as well as shock absorption, accumulated pressure. A paper cold box that is particularly suitable for transporting seafood and other items that use ice, such as excellent strength, and even when the ice contained with seafood such as fish and shellfish is thawed, there is no risk of water leakage. Is to provide.
[0006]
[Means for achieving the object]
In order to achieve the object, according to claim 1, the present invention comprises a box body (a) which is folded and assembled by a single sheet base material made of a paper board material having water resistance and water repellency, and a paper board material. The box body (a) includes a rectangular bottom plate (2), an outer surface plate (3, 4) rising from four sides of the bottom plate, and an outer surface plate (3,4). The upper edge plate (5, 6) bent inward from the upper end of the upper plate, and the inner plate (7, 8) bent downward from the inner end of each upper edge plate (5, 6), and the bottom plate (1 ) And the front and rear inner plates (7) and the front and rear inner plates (7) which are bent inward from the corner portions and the outer and rear outer plates (3, 4). Reinforcing plates (21…) that bend inward from both side ends of the water, and to prevent the water leakage prevention connecting plates (19…) and reinforcement (21 ...) is housed in a cold insulation space (10) secured between the left and right inner and outer surface plates (4, 8), thereby maintaining the strength of the box body (a) and preventing water leakage. and it will be,
Furthermore, there are provided insertion pieces ( 22 , 23 ) that bend from the lower edges of the front, rear, left and right inner plates (7, 8) to a width substantially the same as the width direction of the upper edge plates (5, 6). By bending the insert pieces ( 22 , 23 ) outward along the bottom plate (2), the inner plates (7, 8) are kept in the downward bent state, and the cold insulation spaces (9, 10 ) are moved back and forth. The left and right inner and outer surface plates (7, 3, 8, 4) and the upper edge plates (5, 6) are formed so as to ensure a vertical cross-section surrounding shape,
Furthermore , a joint portion ( 29 ) is provided at a boundary portion between the front and rear inner surface plates (7) and the reinforcing plates ( 21 ...) On both sides of the front and rear inner surface plates (7). part (30) is provided, wherein the engagement piece portion engaging portion (30) when the inner end is bent downward before and after the right and left inner plate (7, 8) respectively of the upper edge plates (5,6) ( 29 ) is a paper cold box formed so as to maintain the bent state of the left and right inner surface plates (7, 8) and the assembled state of the box body (a) by being inserted into and locked to 29 ) .
[0007]
According to such a configuration of claim 1, the peripheral wall portion having the cold insulation space (9, 10) secured by the front and rear, left and right inner and outer surface plates (7, 3, 8, 4) on the four sides of the bottom plate (2). The peripheral wall portion is continuously provided from both side ends with a length substantially equal to the width direction of the front and rear, left and right outer surface plates (3, 4) including the four corner portions of the bottom plate (2). Formed in a single wall structure surrounded by a series of water leak prevention connecting plates (19 ...), it has excellent cold insulation function, and even if the ice contained together with seafood such as fish shellfish is melted, fear of leakage rather free, moreover, the cold space (9, 10), front and rear left and right inner and outer plates (7,3,8,4) and the upper edge plates (5,6), and the insertion pieces (22, 23) and by that is secured formed in the longitudinal sectional annular colloid, box water leakage prevention communicating up plate (19 ...) and reinforcing plate (21 ...) by Product pressure strength of the body (a) is enhanced.
That is, the strength of the cold insulation space (9, 10 ) in the height direction is such that the leakage prevention connecting plate ( 19 ...) and the reinforcing plate ( 21 )), the accumulated pressure strength of the box body (a) when several or several tens are stacked and stored and transported is reinforced.
In addition, the left and right inner surface plates (8) are configured such that the engaging piece portions ( 30 ) on both side ends are inserted and locked to the engaging portions ( 29 ) opened on both side ends of the front and rear inner surface plates (7). In addition, the bent state of the upper end plate (6) from the inner edge downward is maintained, and the inner and rear inner plates (7, 8) are connected to each other between the engagement piece portion ( 30 ) and the engagement portion ( 29 ). As a result of the interlocking connection, the wall structure is connected in series in the four sides of the bottom plate (2), so that the assembled state of the box body (a) is reliably maintained at the same time, and at the same time the accumulated pressure strength of the box body (a) is increased. It will be further strengthened.
[0008]
In the second aspect, the holding piece ( 26) that bends outward from the upper edge of the reinforcing plate ( 21 ...) According to the first aspect to a width substantially equal to the width direction of the upper edge plate (5, 6). ...) it is provided, formed by accommodating bending the holding pieces (26 ...) in cold space (9, 10), cold space together with the reinforcing plate (21 ...) and (9, 10) such that shaped maintained In a paper cold box.
[0009]
According to the configuration of such a second aspect, by the reinforcing plate (21 ...) together holding pieces (26 ...) to accommodate folded cold space (10), holding pieces 26 ..., the reinforcing plate 21 ... And , in particular, the width direction of the cold insulation space (9, 10 ) is maintained in a fixed shape together with the insertion pieces ( 22 , 23 ) . As a result, the box main body (wall-strengthened structure with excellent strength and durability without fear of causing the box collapse such as the inner plate bulging outward due to marine products such as fish and shellfish housed in the box main body (a) ( a) can be assembled.
[0010]
In the present invention, the water leakage prevention connecting plates ( 19 ...) Are integrally connected to the respective outer plates with a length substantially the same as the width direction of the front, rear, left and right outer plates (3, 4). In the state where the front and rear left and right outer plates (7, 8) are folded from the fold lines ( 24 ...) diagonally provided from the four corners of the bottom plate (2), and folded and folded in two, It is in a paper cold box formed so as to be accommodated in the cold space ( 10 ).
Further, a reinforcing plate according to any one of claims 1 to 3 described above (21 ...), the width direction and left and right inner plate at approximately the same width (8) the length of the front and rear inner plate (7) The cold insulation space ( 10 ) is connected to the front and rear inner plates with a length of about half of the length direction, and the opposed ends ( 21 a) that face each other when they are folded inward face each other. A paper cold box formed to be folded and accommodated (Claim 4).
[0011]
According to the configuration described in claims 3 and 4, in addition to the prevention of water leakage due to the surrounding integrated wall structure that is surrounded in series by the water leakage prevention connecting plate ( 19 ...), The cold insulation space ( 10 ) In the state where the water leakage prevention continuous plate ( 19 ...) is folded in half from each diagonal fold line ( 24 ...) and overlapped, and the inner plate (7) is approximately the same as the width direction. holding than the reinforcing plate having a width (21 ...) is accommodated in a state of butting opposing opposite end mutually the (21 a) between each other, while ensuring the cold space (10), the box body (a) Strengthen.
That is, it is possible to assemble a box body (a) having a wall structure that is further strengthened in stacking strength when it is stored and transported by stacking several or several tens, and that is excellent in durability and shock absorption. .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A specific example of the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a developed view of a box body a showing an example of an embodiment of a paper cold box according to the present invention. The box body a is a sheet base material made of paper board material, for example, cardboard paper having water resistance and water repellency. 1 is punched and formed by providing respective fold lines that are bent inwardly and outwardly at a plurality of required portions.
[0015]
As shown in FIG. 1, the sheet base 1 includes a bottom plate 2 having a planar rectangular shape, front and rear left and right outer plates 3, 4 rising from respective fold lines 11, 12 of the bottom plate 2, and respective outer plates. The upper edge plates 5 and 6 that are bent inward from the upper and lower fold lines 13 and 14 and the outer surface plates 3 and 4 that are bent downward from the inner edge fold lines 15 and 16 of the upper edge plates 5 and 6 respectively. It has front and rear inner and rear inner plates 7 and 8 for securing cold insulation spaces 9 and 10 therebetween.
[0016]
In addition, the sheet base material 1 is connected to the corner plate and the front and rear left and right outer surface plates 3 and 4 from the both side edge fold lines 17 and 18 at the four corners, and the water leakage prevention connecting plate is bent inward. 19 and the reinforcing plates 21 bent inwardly from the folding lines 20 on both sides of the front and rear inner plates 7 and 8, and the water leakage preventing connecting plates 19 and the reinforcing plates 21 are connected to the right and left inner and outer plates 8. , 4 is accommodated in a cold-reserving space 10 which is secured between the four, 4, so that the strength of the box body a is maintained and water leakage is prevented.
Further, the sheet base material 1 has insertion pieces 22 and 23 which are bent at a width substantially equal to the width direction of the upper edge plates 5 and 6 from the lower edge folding lines 27 and 28 of the front and rear inner surfaces 7 and 8. And holding the inserted pieces 22 and 23 outward along the bottom plate 1 and inserting them into the bottom of the cold insulation spaces 9 and 10, respectively, By forming the cold insulation spaces 9 and 10 in a vertical cross-sectional shape by the inner and outer surface plates 7, 3, 8, 4 and the upper edge plates 5, 6, the above-described water leakage prevention connecting plates 19 and the reinforcing plates 21. As a result, the pressure strength is further enhanced.
[0017]
The water leakage prevention connecting plate 19 is integrally connected to both the front and rear left and right outer plates 3 and 4 including the four corners of the bottom plate 2, which are integrally raised from the four-side fold lines 11 and 12 of the bottom plate 2. By doing so, water leakage from the inside of the box body a to the outside is prevented. And the intensity | strength of the height direction of this cold insulation space 10 is strengthened by accommodating in the cold insulation space 10 ensured between the left and right inner-and-outer surface plates 8 and 4.
The continuous plate 19 for preventing water leakage is connected to the outer plates 3 and 4 in a length substantially the same as the width direction of the front and rear outer plates 3 and 4, and the four corners of the bottom plate 2. Are formed so that they can be accommodated in the cold-reserving space 10 by being folded inward so as to be folded in two from the diagonal broken lines 24 provided on the diagonal lines from.
[0018]
The reinforcing plates 21 are accommodated in the cold insulation space 10 secured between the left and right inner and outer surface plates 8 and 4, thereby enhancing the strength in the height direction of the cold insulation space 10 (increasing the pressure strength). The short side direction of the opening of the box body a is maintained in a fixed shape together with the left and right inner and outer surface plates 8 and 4.
The reinforcing plates 21 are connected to the front and rear inner plates 7 with substantially the same width as the front and rear inner plates 7 and 8 and about half the length of the left and right inner plates 8. It is formed so that it can be accommodated in the cold-reserving space 10 in a state in which the opposed ends 21a... Facing each other when they are bent inward are in contact with each other (see FIG. 6).
Further, holding piece portions 26 that are bent outward from the upper edge folding lines 25 of the reinforcing plates 21 in a width substantially the same as the width direction of the upper edge plate 6 are connected to be accommodated in the cold-reserving space 10. Thus, the cold insulation space 10 can be secured and maintained together with the reinforcing plates 21 (see FIG. 8).
[0019]
In the figure, 29... Are joint portions provided so as to pass through the cold insulation space 9 at a boundary portion between the front and rear inner surface plates 7 and the reinforcing plates 21 on both sides thereof, that is, along a broken line 20. The coupling pieces 30 provided on both side ends of the inner surface plate 8 are inserted and locked when the front and rear, left and right inner surface plates 7 and 8 are bent downward from the inner end fold lines 15 and 16 of the upper edge plates 5 and 6, respectively. ).
Thus, when the front and rear, left and right inner surface plates (7, 8) are bent downward from the inner ends of the upper edge plates (5, 6), the engagement piece ( 30 ) is engaged with the engagement portion ( 30 ). ( 29 ) by inserting and locking the front and rear, left and right inner surface plates (7, 8) between the engaging piece ( 30 ) and the engaging portion ( 29 ), the bottom plate (2) By providing a wall structure connected in series in the four sides, the assembled state of the box body (a) is reliably maintained in a fixed shape, and at the same time, the accumulated pressure strength of the box body (a) is further strengthened.
As a result, it is possible to assemble a box body (a) having a wall structure having a wall structure excellent in durability and shock absorption while further enhancing the pressure strength when several or several tens are stacked and stored and transported. it can.
[0020]
Next, an assembling procedure of the box body a using the sheet base material 1 configured as described above will be described.
From the state of the development shown in FIG. 1, first, as shown in FIG. 2, the insertion piece 22 is bent from the lower edge fold line 27 of the front and rear inner surface plates 7, and the inner surface plate 7 is attached to the upper edge plate 5. After bending the inner edge fold line 15 and then bending the upper edge plate 5 from the upper edge fold line 13 of the front and rear outer plate 3, the outer surface plate 3 is bent and raised from the front and rear side fold line 11 of the bottom plate 2.
At this time, the aforementioned insertion piece 22 bent from the lower edge fold line 27 of the front and rear inner surface plates 7 is inserted along the bottom plate 2 into the bottom of the cold insulation space 9 secured between the front and rear inner and outer surface plates 7 and 3. Thus, the downward bent state of the front and rear inner surface plates 7 is maintained by the insertion piece 22, and the cold insulation space 9 is secured between the front and rear inner and outer surface plates 7 and 3 (see FIG. 7).
[0021]
Next, the holding piece portions 26 are folded outward from the upper edge folding lines 25 of the reinforcing plates 21 and the reinforcing plates 21 are folded inward from the both-side end folding lines 20 of the front and rear inner surface plates 7.
Thus, as shown in FIG. 3, the engaging portion 29 is opened at the bottom plate portion along the fold line 20 between the front and rear inner surface plates 7 and the reinforcing plates 21, and both sides of the front and rear inner surface plates 7 facing each other. The opposing ends 21a of the reinforcing plate 21 bent inward from the end fold line 20 are in a state of abutting each other.
[0022]
Next, as shown in FIG. 3, the left and right folded plates 17 of the front and rear outer plates 3 are folded in such a way that the water leakage prevention connecting plates 19 are folded inward and the diagonal folded lines 24 are folded. The outer surface plate 4 is bent from the left and right side fold lines 12 of the bottom plate 2 and raised.
As a result, the water leakage preventing connecting plate 19 connected to the front, rear, left, and right outer plates 3 and 4 is arranged at a height substantially the same as that of the outer plates 3 and 4, as shown in FIGS. In the state of being folded and overlapped from the corner fold line 24, the opposing ends 21a are in contact with each other, and are positioned outside the above-described reinforcing plate 21 and are accommodated in the left and right cold insulation spaces 10.
[0023]
Next, as shown in FIG. 4, the insert piece 23 is bent from the lower edge fold line 28 of the left and right inner plates 8, and the upper edge plate 6 is bent inward from the upper fold line 14 of the left and right outer plates 4. The left and right inner surface plates 8 are bent downward from the inner end fold line 16 of the upper edge plate 6.
At this time, the cold insulation space secured between the lower edge of the reinforcing plate 21 from the lower edge of the reinforcing plate 21 and the left and right inner and outer surface plates 8, 4 along the bottom plate 2 with the above-described insertion piece portion 23 bent from the lower edge fold line 28 of the left and right inner surface plates 8. The inner and outer surface plates 8 on the right and left sides are accommodated in the bottom portion of the inner surface plate 8 and the engaging pieces 30 on both side ends of the inner surface plate 8 are inserted and engaged with the engaging portions 29 opened on both side ends of the front and rear inner surface plates 7. , 4 is ensured, and the assembly of the box body a is completed. That is, the downwardly bent state of the left and right inner surface plates 8 is maintained by the insertion piece portions 23. In this state, the engagement piece portions 30 at both ends of the inner surface plate 8 are inserted and locked into the engagement portions 29 described above. As a result, the assembly of the box body a is completed (see FIG. 5) in a state that is reliably maintained by the locking force (the state shown in FIGS. 6, 7, and 8).
[0024]
In addition, the assembly procedure of the box main body a mentioned above is only an example, and is not limited to this.
[0025]
The lid b has a lid 31 formed by punching from the above-mentioned corrugated cardboard having water resistance and water repellency so as to cover the opening of the box body a, and the box body on the four sides of the lid 31 one or several sheets of the above-mentioned corrugated paper having the same size as the inner dimension of the box body a on the back side of the lid 31. And is formed so that the box body a can be covered in a sealed manner by the fitting portion 33 (two points in FIGS. 5, 7 and 8). (See chain line).
In addition, although illustration is abbreviate | omitted, the cold insulation space is ensured between the cover part 31 and the fitting part 33 of this cover body b, and the improvement of a cold insulation function (ability) like the box main body a is aimed at. Of course, it is free.
[0026]
【The invention's effect】
Since the paper cold box of the present invention is configured as described above, the following operational effects are obtained.
According to the configuration of the first aspect, the peripheral wall portion having the cold insulation space is formed on the four sides of the bottom plate, and the peripheral wall portion is continuously provided from both side ends of the front and rear, left and right outer plates including the four corner corner portions of the bottom plate. The integrated wall structure is surrounded by a series of water leak prevention connecting plates, so it has a cold insulation function, and there is no risk of water leakage even if the ice contained with seafood such as fish and shellfish is thawed. In addition, it can be suitably used for transporting fish and shellfish etc. that are transported with ice , and the cold insulation space is secured in a vertical cross-section by a front / rear / left / right inner / outer surface plate, an upper edge plate, and an insertion piece. As a result, the accumulated pressure strength of the box main body is reinforced by the water leakage prevention connecting plate and the reinforcing plate.
That is, the strength in the height direction of the cold insulation space is several or several depending on the wall structure of the leakage prevention connecting plate and the reinforcing plate folded and accommodated in the cold insulation space in addition to the vertical cross-section surrounding structure of the cold insulation space. The accumulated pressure strength of the box body when ten pieces are stacked, stored and transported is strengthened.
In addition, the left and right inner side plates are bent downward from the inner edge of the upper end plate by engaging and engaging the engaging piece portions on both side ends with the engaging portions opened on both side ends of the front and rear inner side plates. Is maintained, and the inner and outer plates of the front, rear, left, and right have a wall structure that is continuously connected in the four sides of the bottom plate by engaging and engaging the engaging piece portion and the engaging portion. The shape of the box body is further strengthened at the same time as being reliably maintained in a fixed shape.
[0027]
Further, the configuration of claim 2, in addition to the operation described above according to claim 1, by a reinforcement plate (21 ...) together holding pieces accommodated folded cold space, holding pieces, the reinforcing plate 21 ... and the width direction of the cold insulation space together with the inserted piece portion is maintained in a fixed shape. As a result, it is possible to assemble a box body with a wall-reinforced structure with excellent strength and durability without fear of causing box collapse such as the inner plate bulging outward due to marine products such as fish shellfish housed in the box body it can.
[0028]
Further, in addition to the effects of the first and second aspects, the water leak preventing connecting plate is folded in a folded manner from the respective diagonal fold lines and overlapped by the structure according to the third and fourth aspects. In addition, since the reinforcing plates are accommodated in a state in which the opposing ends facing each other face each other, it is possible to reliably secure a cold insulation space and hold and strengthen the box body. That is, it is possible to assemble a box body having a wall structure that is enhanced in the accumulated pressure strength when several or several tens are stacked, stored and transported, and which is excellent in durability and shock absorption.
In addition, since the front and rear inner and outer surface plates, the upper edge plate, and the insertion piece part ensure a cold insulation space in a vertical cross-sectional shape, securing the cold insulation space and the box with the aforementioned water leakage prevention connecting plate and the reinforcing plate The accumulated pressure strength of the main body can be further strengthened.
That is, it is possible to assemble a box body (a) having a wall structure that is further strengthened in stacking strength when it is stored and transported by stacking several or several tens, and that is excellent in durability and shock absorption. .
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a box body showing an example of an embodiment of the paper cold box of the present invention. FIG. 2 is a perspective view showing an assembly procedure of the box body. FIG. 3 is a perspective view showing an assembly procedure of the box body. FIG. 4 is a perspective view showing the procedure for assembling the box body. FIG. 5 is a perspective view showing the box body after the assembly is completed, and a lid. FIG. 6 is a cross-sectional plan view showing an enlarged part of the box body. FIG. 7 is a side view of the same longitudinal section with a part further cut away.
a: Box body 1: Sheet base material 2: Bottom plate 3, 4: Outer surface plate 5, 6: Upper edge plate 7, 8: Inner surface plate 9, 10: Cold storage space 19 ...: Connected plate for preventing water leakage
21: Reinforcing plate 21a: Opposing end
22, 23: Insertion piece 26 ...: Holding piece
29: Engagement part 30: Engagement part b: Lid

Claims

紙製板材からなる一枚のシート基材（１）により折り曲げ組み立てられる箱本体（ａ）と、紙製板材からなる蓋体（ｂ）とで構成され、
箱本体（ａ）は、矩形状の底板（２）と、この底板（２）の四辺から立ち上がる外面板（３，４）と、夫々の外面板（３，４）の上端から内側に折れ曲がる上縁板（５，６）と、夫々の上縁板（５，６）の内端から下方へ折れ曲がる内面板（７，８）とを有し、
且つ、前記底板（１）の四隅コーナーにおいて該コーナー部と前後左右の外面板（３，４）の両側端から連設させて内側に折れ曲がる水漏れ防止用連設板（19…）と、前後の内面板（７）の両側端から内側に折れ曲がる補強板（21…）とを有し、
それら水漏れ防止用連設板（19…）と補強板（21…）を左右の内外面板（４，８）の間に確保される保冷空間（10）に折り曲げ収容することにより、箱本体（ａ）の強度を保持すると共に水漏れを防止するように形成してなり、
更に、上記前後左右の内面板（７，８）の下縁から上記上縁板（５，６）の幅方向と略同程度の幅にて折れ曲がる挿入片部（ 22 ， 23 ）を設け、この挿入片部（ 22 ， 23 ）を上記底板（２）に沿わせて外側に折り曲げることにより、夫々の内面板（７，８）の下向き折り曲げ状態の保持と、保冷空間（９， 10 ）を前後左右の内外面板（７，３、８，４）と上縁板（５，６）とにより縦断面囲繞状に確保するように形成し、
更にまた、上記前後の内面板（７）とその両側の上記補強板（ 21 …）との境部位に結合部（ 29 ）を設けると共に、左右の内面板（８）の両側端には結合片部（ 30 ）を設け、前後左右の内面板（７，８）を夫々の上縁板（５，６）の内端から下方へ折り曲げた時に前記係合片部（ 30 ）を係合部（ 29 ）に差込み係止させることにより、左右の内面板（７，８）の下方への折り曲げ状態の維持と箱本体の組み立て状態の定形維持とが成されるように形成したことを特徴とする紙製保冷箱。It is composed of a box body (a) that is folded and assembled by a single sheet base material (1) made of paper board material, and a lid (b) made of paper board material,
The box body (a) is a rectangular bottom plate (2), an outer surface plate (3, 4) that rises from the four sides of the bottom plate (2), and an upper portion that is bent inward from the upper end of each outer surface plate (3, 4). An edge plate (5, 6) and an inner surface plate (7, 8) bent downward from the inner end of each upper edge plate (5, 6);
And at the four corners of the bottom plate (1), the corner plate and the front and rear left and right outer plates (3, 4) are connected continuously from both ends of the outer plate (3, 4). A reinforcing plate (21...) That is bent inwardly from both side ends of the inner surface plate (7).
The box main body (19) and the reinforcing plate (21 ...) are folded and accommodated in a cold insulation space (10) secured between the left and right inner and outer surface plates (4, 8). It is formed to maintain the strength of a) and prevent water leakage ,
Furthermore, there are provided insertion pieces ( 22 , 23 ) that bend from the lower edges of the front, rear, left and right inner plates (7, 8) to a width substantially the same as the width direction of the upper edge plates (5, 6). By bending the insert pieces ( 22 , 23 ) outward along the bottom plate (2), the inner plates (7, 8) are kept in the downward bent state, and the cold insulation spaces (9, 10 ) are moved back and forth. The left and right inner and outer surface plates (7, 3, 8, 4) and the upper edge plates (5, 6) are formed so as to ensure a vertical cross-section surrounding shape,
Furthermore , a joint portion ( 29 ) is provided at a boundary portion between the front and rear inner surface plates (7) and the reinforcing plates ( 21 ...) On both sides of the front and rear inner surface plates (7). part (30) is provided, wherein the engagement piece portion engaging portion (30) when the inner end is bent downward before and after the right and left inner plate (7, 8) respectively of the upper edge plates (5,6) ( 29 ) It is formed by inserting and locking the left and right inner surface plates (7, 8) so that the bent state of the left and right inner plates (7, 8) is maintained downward and the assembled state of the box body is maintained. Paper cold box.

請求項１記載の補強板（ 21 …）の上縁から上縁板（５，６）の幅方向と略同程度の幅にて外側に折れ曲がる保持片部（ 26 …）を設け、前記補強板（ 21 …）と共に保持片部（ 26 …）を保冷空間（９， 10 ）に折り曲げ収容させることにより、前記補強板（ 21 …）と共に保冷空間（９， 10 ）を定形維持するように形成したことを特徴とする紙製保冷箱。A retaining piece ( 26 ...) that bends outward from the upper edge of the reinforcing plate ( 21 ...) according to claim 1 to a width substantially equal to the width direction of the upper edge plate (5, 6). by accommodating the bent holding pieces (26 ...) in cold space (9, 10) with (21 ...), said reinforcing plate (21 ...) cold space (9, 10) together to form to amorphous maintained Paper cold box characterized by that .

上記水漏れ防止用連設板（ 19 …）は、前後左右の外面板（３，４）の幅方向と略同程度の長さを有し、底板（２）の四隅コーナー部からの対角線上に折畳み重合せしめた状態で、保冷空間（ 10 ）に補強板（ 21 …）と共に折り曲げ収容されるように形成していることを特徴とする請求項１又は２記載の紙製保冷箱。 The water leakage prevention connecting plate ( 19 ...) has a length substantially the same as the width direction of the front, rear, left and right outer plates (3, 4) and is diagonally extending from the four corners of the bottom plate (2). in a state that allowed folding polymerization, the reinforcing plate (21 ...) paper cold box according to claim 1 or 2, wherein the forming so as to be bent housed together in the cold space (10).

上記補強板（ 21 …）は、前後の内面板（７）の幅方向と略同程度の幅で且つ左右の内面板（８）の長さ方向の略半分程度の長さを有し、内側に折り曲げられた時に互いに対向し合う対向端（ 21 ａ…）同士を突き合わせた状態で、保冷空間（ 10 ）に折り曲げ収容されるように形成していることを特徴とする請求項１乃至３いずれか 1 項記載の紙製保冷箱。 The reinforcing plate ( 21 ...) Has a width that is approximately the same as the width direction of the front and rear inner surface plates (7) and a length that is approximately half the length direction of the left and right inner surface plates (8). 4. Any one of claims 1 to 3, characterized in that it is formed so as to be folded and accommodated in the cold insulation space ( 10 ) in a state in which opposing ends ( 21 a. paper cold box of one of claims.