JP2004345721A

JP2004345721A - Paper package container

Info

Publication number: JP2004345721A
Application number: JP2003147881A
Authority: JP
Inventors: Hideaki Hosobuchi; 秀明細渕
Original assignee: SAN ECHO ENGINEERING KK; SMILE CORP
Current assignee: SAN ECHO ENGINEERING KK; SMILE CORP
Priority date: 2003-05-26
Filing date: 2003-05-26
Publication date: 2004-12-09

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new paper package container in which a side part of a container, even if formed by an automatic box manufacturing machine, can be positively bent outward against the pressing force of a connecting face part so as to allow containers to be formed next to be smoothly stacked on the previously formed containers. <P>SOLUTION: Only a longitudinal folding line 5 is engraved substantially at the center in the width direction of the side face part 2 to form the side face part 2 with a connecting face part 3 stuck thereto bending outward against the pressing force of the connecting face part 3. The folding line 5 is previously engraved in a blank B, not at the time of forming the container, and is not affected at all when the container is formed with the automatic box manufacturing machine. This enables the container to be formed with its side face part 2 bent outward, even if the blank B is a material having a core such as a this paper or a corrugated board. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、１枚のブランクを折り曲げて成形される紙製包装容器に関し、詳しくは、底面部と、該底面部の外周各辺から立ち上がる複数の側面部と、隣り合う側面部同士を連結する連結面部を備えた紙製包装容器における、連結面部を貼り着けた側面部の内側への倒れ込み防止構造の改良に関する。
【０００２】
【従来の技術】
従来、この種容器として、例えば特許文献１に記載されるように、折線によって折り曲げ可能な板状体（ブランク）からなり、ベース板状部（底面部）と、該ベース板状部を取り囲む第１折線を介して立ち上がる複数の側板状部（側面部）と、該側板状部間にわたるよう連設され中心にある第３折線によって区分された一対の三角形状をなす接着板状部（連結面部）を有し、該接着板状部を中心の第３折線において折り曲げるように外方に突き出し、側板状部に貼り着けて隣り合う側板状部を連結すると共に、側板状部に外方に向けて反り出す向きの力を生ずるよう、ベース板状部を取り囲む第１折線の中央側を側板状部の先端側に向けて離れ出すよう設けたものがある。
【０００３】
【特許文献１】
特開２０００−３３９３４号公報
【０００４】
【発明が解決しようとする課題】
前記した従来の容器は、接着板状部の押圧に抗して側板状部を外方に向けて反り出させることで、自動製函機において、先に成形されている容器に対し、次に成形される容器を順次に積み重ねる作業が円滑になされるようにし、当該容器の自動製函機による円滑な成形を容易ならしめんとするものである。
しかし乍ら、このような従来の容器では、自動製函機による成形の際、ベース板状部を取り囲む第１折線を、その中央側が側板状部の先端側に向けて離れ出すようにすることが困難である。
【０００５】
すなわち、前記従来の容器は、側板状部とベース板状部との間に備えられている第１折線を、その中央側が側板状部の先端側に向けて弧状若しくは山形状に離れ出すよう形成するものであるが、前記第１折線を自動製函機でもってこのように形成しようとすると、容器成形材料である板状体が単層の紙材のような芯を持たないものである場合は問題ないが、板紙や厚紙、段ボールのような芯を持つ板状体を用いた場合、前記第１折線が板状体に刻設され、その折癖により、側板状部が外方に向けて反り出さなくなる虞れがあった。
【０００６】
本発明はこのよう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、１枚のブランクを折り曲げて成形される紙製包装容器において、先に成形されている容器に対し、次に成形される容器を上から順次積み重ねる（スタッキング）作業が円滑になされるようにするべく、連結面部の押圧に抗して側面部を外方に向けて反り出させるにあたり、その反り出しが、自動製函機により成形される容器であっても確実になされる新規な紙製包装容器を提供することにある。
【０００７】
【課題を解決するための手段】
以上の目的を達成するために本発明は、請求項１記載のように、１枚のブランク（Ｂ）を折り曲げて成形される紙製包装容器であって、底面部（１）と、該底面部（１）の外周各辺に折線（１ａ）を介して立ち上がる複数の側面部（２）と、該側面部（２）の側縁に折線（２ａ）を介して連設され、側面部（２）の外面に貼り着けて隣り合う側面部（２）同士を連結する連結面部（３，４）を備え、少なくとも、前記連結面部（３，４）が貼り着けられる側面部（２）の幅方向略中央に縦方向の折目（５）を刻設して該側面部（２）が外側へ反り出すよう形成したことを特徴とする。
【０００８】
このような構成とした場合、側面部（２）の幅方向略中央に縦方向の折目（５）を刻設するだけの簡単な構成の付加により、連結面部（３，４）が貼り着けられる側面部（２）を、該連結面部（３，４）の押圧に抗して外側へ反り出すようにすることができる。また、前記折目（５）は、ブランク（Ｂ）に予め刻設されるもので、容器成形の際に形成するものではないので、自動製函機による容器成形時に何等影響されることなく、ブランク（Ｂ）が厚紙や段ボールのような芯を持つ材料であったとしても、側面部（２）が外側へ反り出すようにすることができる。
【０００９】
また本発明の請求項２は、前記折目（５）の下端部（５’）を前記底面部の折線（１ａ）と離間して位置させると共に、該下端部（５’）と前記折線（１ａ）の両端角部（１ｃ，１ｃ）の間に折目（６，６）を刻設し、該折目（６，６）と前記折線（１ａ）とで囲まれる三角形状の区画面（７）により、前記側面部（２）に外側へ反り出す力が生じるよう形成したことを特徴とする。
【００１０】
このように形成した場合、区画面（７）を備えることにより、側面部（２）が外側へ反り出す状態を自然に生じさせることができ、請求項１による効果をより実効あるものとすることができる。加えて、区画面（７）が、容器を持つ際に使用者の指を添える指当て面として機能し、側面部（２）が平坦面である場合に比べ、使い易い（持ち易い）容器とすることができるなどの利点がある。
【００１１】
また本発明の請求項３は、前記底面部（１）の外周各辺の中間位置を外側へ突出させた中間頂角（１ｄ）を備え、該中間頂角（１ｄ）により、前記側面部（２）に外側へ反り出す力が生じるよう形成したことを特徴とする。
【００１２】
このように形成した場合、底面部（１）に中間頂角（１ｄ）を備えるよう折線（１ａ）を刻設するだけの簡単な構成の付加により、側面部（２）が外側へ反り出す状態を自然に生じさせることができ、請求項１による効果をより実効あるものとすることができる。
【００１３】
本発明の請求項４は、前記連結面部（３）が、隣り合う側面部（２，２）間にわたって連設され、且つ中央にある折線（３ａ）によって区分された一対の三角形状をなし、該連結面部（３，３）を折線（３ａ）において折り曲げるように重ねて外方へ突き出し且つ折り重ね状の連結面部（３，３）を折線（２ａ）に沿って折り曲げ、側面部（２）へ貼り着けて隣り合う側面部（２，２）同士を連結した紙製包装容器であることを特徴とする。
【００１４】
すなわち、本発明の請求項１〜３に係る紙製包装容器は、側面部（２）の外面に貼り着けて隣り合う側面部（２）同士を連結する連結面部（３，４）として、隣り合う側面部（２，２）のうち何れか一方の側面部（２）の側縁に折線（２ａ）を介して一枚の連結面部（４）を連設し、この連結面部（４）を、他方の側面部（２）の外面に貼り着けて隣り合う側面部（２，２）同士を連結した態様（連結面部が一枚ものである態様）と、隣り合う側面部（２，２）の双方の側縁間にわたって連結面部（３，３）を連設し、且つその連結面部（３，３）を、中央にある折線（３ａ）によって区分された一対の三角形状をなすようにし、該連結面部（３，３）を折線（３ａ）において折り曲げるように重ねて外方へ突き出し、且つ折り重ね状の二枚の連結面部（３，３）を折線（２ａ）に沿って折り曲げ、側面部（２）へ貼り着けて隣り合う側面部（２，２）同士を連結した態様（連結面部が二枚重ねたものである態様）との双方を含むものである。
連結面部の押圧による側面部の内側への倒れ込みは、連結面部が二枚重ねたものである場合の方がより生じ易く、よって、本発明は、請求項４の態様において特に顕著な効果を発揮するものである。
【００１５】
本発明の請求項５は、前記底面部（１）に、該底面部の中心（１ｂ）から外方へ向けて放射状となる折目（８）を刻設し、前記中心（１ｂ）が頂点となるよう前記折目（８）に沿って底面部（１）を容器内側へ凹ませて上げ底状に形成したことを特徴とする。
【００１６】
このような構成とした場合、容器をテーブル面等の載承面に載せた際、底面部の各角部（１ｃ，１ｃ・・・）のみが載承面に接触して容器が支持されるので、容器の安定性が向上すると共に、載承面との間での熱伝導性が小さくなり、保温機能の向上が期待できる。また、容器内に食品などを収容して電子レンジにより加熱する場合、電子レンジ内の載承面との間での熱伝導性が小さくなるなどの理由から、短時間で加熱が行えるなどの効果が期待できる。
【００１７】
本発明の請求項６は、前記折目（８）が、前記底面部の中心（１ｂ）から前記中間頂角（１ｄ）にわたって形成されていることを特徴とする。
【００１８】
このような構成とした場合、底面部の中心（１ｂ）が内側へ押し込まれる力を生じさせるだけで上げ底状の底面部を得ることができるので、紙製包装容器の自動製函機による成形が容易になり、従来に比べより迅速な自動成形を可能としつつ、上げ底状の紙製包装容器が得られるなどの利点がある。
【００１９】
本発明に係る紙製包装容器の形状は特に限定されるものではないが、例えば、底面部（１）が三角形状である略三角柱型、底面部（１）が四角形状である略四角柱型、その他、底面部（１）が五角形状以上の多角柱型など、各種形状の紙製包装容器とすることができる。
【００２０】
【発明の実施の形態】
以下、本発明に係る紙製包装容器の実施形態の例を図面に基づいて説明する。
図１に示す紙製包装容器Ａは、本発明の請求項１に係るもので、１枚のブランクＢの要所の折り曲げと貼り着けにより、容器の底面部１、該底面部１の外周各辺に折線１ａを介して立ち上げる複数の側面部２、隣り合う側面部２同士の側縁に折線２ａを介して連設される連結面部３，３などを形成して、上面が開口する略三角柱形状の容器として成形されている。
【００２１】
上記ブランクＢは、例えば板紙や厚紙又は段ボールなどの所定の強度を有する（芯を持つ）紙製基材からなり、必要に応じて表面が耐水加工されたものを使用し、所要形状に裁断されたブランクＢの中心に底面部１を配置すると共に、その外周各辺に折線１ａを介して複数の側面部２が連設されている。
本例の場合には図２に示す如く、ブランクＢの中心に三角形状である底面部１を配置すると共に、その外周三辺に折線１ａを介して三つの側面部２が連設されている。側面部２は、前記折線１ａから上縁２ｂに向けて漸次幅広となるよう形成されている。
【００２２】
また本例では、隣り合う側面部２の側縁の折線２ａ間にわたって連設された連結面部３，３を有し、これら連結面部３同士は、中央にある折線３ａによって区分された一対の三角形状をなし、該連結面部３，３を折線３ａにおいて折り曲げるように重ねて外方へ突き出し、その折り重ねた連結面部３，３を折線２ａに沿って折り曲げ側面部２へ貼り着けることで、隣り合う側面部２，２同士が連結されている。
【００２３】
尚、隣り合わせる側面部２，２同士を連結する手段はこれに限定されず、図３に示すように、隣り合う側面部２，２における一方の側面部２の側縁のみに折線２ａを介して連結面部４を連設し、該連結面部４を折線２ａに沿って折り曲げ他方の側面部２の外面に貼り着けて、隣り合わせる側面部２同士を連結しても良い。
【００２４】
前記各側面部２には、その幅方向略中央に縦方向の折目５を刻設することで、貼り着けられた連結面部３，３若しくは連結面部４の押圧により内側へ倒れ込むこと無く、該側面部２が外側へ反り出すよう形成されている。
本例においては、折り重ねた各連結面部３，３を折線２ａに沿って同一方向へ折り曲げて側面部２の外面に貼り着けているので、全ての側面部２に連結面部３，３が貼り着けられるようになり、よって、全ての側面部２に折目５が刻設されている。
【００２５】
このような構成になる本例の紙製包装容器は、図１に示す組み立て状態（成形状態）において、折り重なる連結面部３，３が側面部２に貼り着けられているので、収容物が液状物や流動物であっても、隣り合わせる側面部２，２間から漏れ出すような虞れが無い。
【００２６】
また、側面部２に折目５を追加するだけの簡単な構成で、貼り着けた連結面部３，３の押圧に抗して側面部２を外側へ反り出し、該側面部２の内側への倒れ込みを防止することができる。
よって、先に成形されている容器に対し、次に成形される容器を上から順次積み重ねる（スタッキング）作業が円滑になされるようになり、自動製函機により容易且つ迅速に自動成形し得る紙製包装容器とすることができる。
【００２７】
図４，図５に示す紙製包装容器Ａは、本発明の請求項１に係り、図１，図２に示す紙製包装容器において、底面部１の形状を四角形状としたものである。
すなわち、この例では、四角形状の底面部１の外周四辺に折線１ａを介して四つの側面部２を連設すると共に、折り重ねた各連結面部３，３を折線２ａに沿って相対する方向へ折り曲げて、相対向する一対の側面部２の外面に貼り着けている。よって、前記折目５は、相対向する二つの側面部２のみに刻設されている。
【００２８】
従って、この例においても、貼り着けた連結面部３，３の押圧に抗して側面部２を外側へ反り出し、該側面部２の内側への倒れ込みを防止して、自動製函機により容易且つ迅速に自動成形し得る紙製包装容器とすることができる。
それ以外の構成、作用効果は図１，図２に示した例と基本的に同様のため、重複する図示、説明は省略する。
【００２９】
図６，図７に示す例は、本発明の請求項２に係り、図１，図２に示す紙製包装容器において、側面部２に区画面７を追加したものである。
すなわち、この例の紙製包装容器Ａは、前記折目５の下端部５’を底面部外周の折線１ａと離間して位置させると共に、該下端部５’と前記折線１ａの両端にある角部１ｃ，１ｃとの間に折目６，６を刻設し、該折目６，６と前記折線１ａとで囲まれる三角形状の区画面７により、前記側面部２に外側へ反り出す力が自然に生じるよう形成されている。
【００３０】
従って、この例においては、貼り着けた連結面部３，３の押圧に抗して側面部２が自然に外側へ反り出し、該側面部２の内側への倒れ込みをより確実に防止して、自動製函機による自動成形をより容易且つ迅速なものとし得る紙製包装容器とすることができる。
また、ブランクＢを成形する際、側面部２に折目６，６を刻設するだけの簡単な構成で、側面部２に外側へ反り出す力が自然に生じるようにして、前記した効果を得ることができる。
またこの例では、区画面７が、容器を持つ際に使用者の指を添える指当て面として機能し、側面部２が平坦面である場合に比べ、使い易いなどの利点がある。
処で、前記ブランクＢに段ボール等の板紙を用いた場合、該ブランクＢには紙材の目１００が入るようになるが、この目１００が、縦方向若しくは横方向の折線１ａ，２ａなどと略平行若しくは略直交する方向にあると、この目１００と平行になる折線は折れ易く、直交する折線は折れ難くなる。よって、この種紙製包装容器に用いるブランクＢにおいては、各図中に示すように、前記目１００が縦方向若しくは横方向の折線１ａ，２ａに対し所定の角度をもって交差するように配慮されている。このため、容器の成形若しくは使用中に、その目１００に沿って折目が入り見栄えが悪くなる虞れがある。これに対しこの例では、側面部２に折目６が予め刻設されていることで、前記目１００に沿って折目が入ることを可及的防止し得るという利点がある。
尚、前記区画面７の大きさは、該区画面７の底辺となる両端角部１ｃ，１ｃ間を結ぶ線ｘ（この例では折線１ａ）と、該線ｘの中間点から折目５の下端部５’を結ぶ線ｙとの比率が、ｘ：ｙ＝１０：３以上となることが好ましく、図示例の形状の紙製包装容器Ａでは、ｘ：ｙ＝１０：５程度であることが好ましい。
それ以外の構成、作用効果は前述した例と基本的に同様のため、重複する図示、説明は省略する。
【００３１】
図８，図９に示す例は、本発明の請求項２に係り、図４，図５に示す紙製包装容器において、側面部２に区画面７を追加したものである。
すなわち、この例の紙製包装容器Ａは、連結面部３，３が貼り着けられた相対向する二つの側面部２に刻設した折目５の下端部５’を折線１ａと離間して位置させると共に、該下端部５’と前記折線１ａの両端にある角部１ｃ，１ｃとの間に折目６，６を形成し、該折目６，６と前記折線１ａとで囲まれる三角形状の区画面７により、前記側面部２に外側へ反り出す力が自然に生じるよう形成されている。
【００３２】
従って、この例においても、貼り着けた連結面部３，３の押圧に抗して側面部２が自然に外側へ反り出し、該側面部２の内側への倒れ込みをより確実に防止して、自動製函機による自動成形をより容易且つ迅速なものとし得る紙製包装容器とすることができる。また、区画面７が、容器を持つ際に使用者の指を添える指当て面として機能し、側面部２が平坦面である場合に比べ、使い易いなどの利点がある。
それ以外の構成、作用効果は前述した例と基本的に同様のため、重複する図示、説明は省略する。
【００３３】
図１０，図１１に示す例は、本発明の請求項３に係り、図１，図２に示す紙製包装容器において、底面部１に中間頂角１ｄと折目８を追加したものである。
すなわちこの例の紙製包装容器Ａは、前記底面部１が、三角形の外周三辺の中間位置を外側へ突出させた中間頂角１ｄを備えると共に、折目５の下端部５’がその中間頂角１ｄに接するよう形成し、その中間頂角１ｄにより、側面部２に各折目５が頂点となる外側へ反り出す力が自然に生じるように形成されている。
【００３４】
また、この例の紙製包装容器Ａは、前記底面部１に、該底面部の中心１ｂから各中間頂角１ｄにわたって放射状（Ｙ字形状）となる折目８を形成し、前記中心１ｂが頂点となるようその折目８に沿って底面部１を容器の内側へ凹ませて上げ底状に形成されている。
【００３５】
従って、この例においても、貼り着けた連結面部３，３の押圧に抗して側面部２が自然に外側へ反り出し、該側面部２の内側への倒れ込みをより確実に防止して、自動製函機による自動成形をより容易且つ迅速なものとし得る紙製包装容器とすることができる。
また、ブランクＢを成形する際、底面部１に中間頂角１ｄを追加するべく折線１ａを刻設するだけの簡単な構成で、側面部２に外側へ反り出す力が自然に生じるようにして、前記した効果を得ることができる。
【００３６】
またこの例では、底面部１に、その中心１ｂから各中間頂角１ｄにわたる放射状の折目８を形成したので、自動製函機による容器の自動成形過程において、底面部１の中心１ｂが容器内側へ向けて押される力が生じるようにするだけで、底面部１が折目８に沿って自然に凹み、上げ底状の紙製包装容器を容易且つ確実に得ることができる。
よって、この紙製包装容器Ａを、例えばテーブルなどの平坦面に載せた際、底面部１の各角部１ｃ，１ｃ・・・のみが夫々接触してガタ付くことがなく、使用時の安定性を向上できる。さらに、容器の保温効果の向上などをも目的として、前記のような上げ底状とするにあたり、容器の自動成形時において容易に成形することができるなどの利点がある。
尚、このように上げ底状の容器とすることは、食品などを収容して電子レンジにより加熱する場合、電子レンジ内の載承面との間での熱伝導性が小さくなるなどの理由から、短時間で加熱が行えるなどの効果が期待できる。
上げ底の度合いとしては、底面部１の隣り合わせる角部１ｃ，１ｃ間を結ぶ線ｘ（この例では仮想の線ｘ）と、該線ｘの中間点から折目５の下端部５’を結ぶ線ｙとの比率が、ｘ：ｙ＝１０：３以上となることが好ましく、図示例の形状の紙製包装容器Ａでは、ｘ：ｙ＝１０：５程度であることが好ましい。
それ以外の構成、作用効果は前述した例と基本的に同様のため、重複する図示、説明は省略する。
【００３７】
図１２，図１３に示す例は、本発明の請求項３に係り、図４，図５に示す紙製包装容器において、底面部１に中間頂角１ｄと折目８を追加したものである。
すなわちこの例の紙製包装容器Ａは、前記底面部１が、四角形の外周四辺の中間位置を外側へ突出させた中間頂角１ｄを備え、折目５の下端部５’がその中間頂角１ｄに接するよう形成し、その中間頂角１ｄにより、側面部２に各折目５が頂点となる外側へ反り出す力が自然に生じるように形成されている。
【００３８】
また、この例の紙製包装容器Ａは、前記底面部１に、該底面部の中心１ｂから各中間頂角１ｄにわたって放射状（十字形）となる折目８を形成し、前記中心１ｂが頂点となるようその折目８に沿って底面部１を容器の内側へ凹ませて上げ底状に形成されている。
【００３９】
従って、この例においても、貼り着けた連結面部３，３の押圧に抗して側面部２が自然に外側へ反り出し、該側面部２の内側への倒れ込みをより確実に防止して、自動製函機による自動成形をより容易且つ迅速なものとし得る紙製包装容器とすることができる。
また、ブランクＢを成形する際、底面部１に中間頂角１ｄを追加するべく折線１ａを刻設するだけの簡単な構成で、側面部２に外側へ反り出す力が自然に生じるようにして、前記した効果を得ることができる。
【００４０】
またこの例でも、底面部１に、その中心１ｂから各中間頂角１ｄにわたる放射状の折目８を形成したので、自動製函機による容器の自動成形過程において、底面部１の中心１ｂが容器内側へ向けて押される力が生じるようにするだけで、底面部１が折目８に沿って自然に凹み、上げ底状の紙製包装容器を容易且つ確実に得ることができる。
それ以外の構成、作用効果は、前述した例と基本的に同様のため、重複する説明、図示は省略する。
【００４１】
図１４，図１５に示す例は、本発明の請求項３に係り、図１２，図１３に示す紙製包装容器において、側面部２に区画面９を追加したものである。
すなわち、この例では、底面部１の中間頂角１ｄにより、側面部２に外側へ反り出す力が自然に生じるようにすると共に、側面部２の左右側縁の折線２ａの中間部から、底面部１の中間頂角１ｄにわたり折目１０，１０を刻設し、これら折目１０，１０と折線１ａ，折線２ａで囲まれる三角形の区画面９を、側面部２の左右両側の下部に形成したものである。
【００４２】
この例によれば、区画面９，９が、容器を持つ際に使用者の指を添える指当て面として機能し、側面部２が平坦面である場合に比べ、使い易いなどの利点がある。また、折目１０，１０が、前記折目６と同様の効果を奏する。
それ以外の構成、作用効果は前述した例と基本的に同様のため、重複する図示、説明は省略する。
【００４３】
尚、前述した各例において、折目５を刻設する側面部２は、連結面部３，４を貼り着ける側面部２のみに限定されず、連結面部３，４を貼り着けない側面部２にも刻設しても良く、任意である。
【００４４】
また、図４〜図１５に示す各例においても、図３に示すように、隣り合う側面部２の一方の側縁のみに連結面部４を連設し、該連結面部４を他方の側面部２の外面に貼り着けて、隣り合わせる側面部２同士を連結しても良いことは言うまでもない。
【００４５】
以上、本発明の実施形態の例を図面を参照して説明したが、本発明に係る紙製包装容器は図示例に限定されず、特許請求範囲の各請求項に記載された技術的思想の範疇において種々の変更が可能であることは言うまでもない。
【００４６】
【発明の効果】
本発明に係る紙製包装容器は以上説明したように構成したので、以下の効果を奏する。
【００４７】
（請求項１）
ブランク（Ｂ）に折目（５）を刻設するだけの極めて簡単且つ低コストな手段で、側面部（２）の内側への倒れ込みを防止して、連結面部（３，４）の押圧に抗して側面部（２）を外側へ反り出すようにすることができる。また、折目（５）は、ブランク（Ｂ）に予め刻設されるもので、容器成形の際に形成するものではないので、自動製函機による容器成形時に何等影響されることなく、ブランク（Ｂ）が厚紙や段ボールのような芯を持つ材料であったとしても、側面部（２）が外側へ反り出すようにすることができる。
従って、ブランク（Ｂ）の素材に影響することなく、自動製函機による自動成形に極めて有効な紙製包装容器を提供できた。
【００４８】
（請求項２，３）
三角形状の区画面（７）又は底面部の中間頂角（１ｄ）を備えることで、側面部（２）が自然に外側へ突出するようになるので、請求項１の効果をより実効あるものとし得る。
また、三角形状の区画面（７）が容器を持つ際に使用者の指を添える指当て面として機能し、使い易い容器とすることができるなどの効果がある。
【００４９】
（請求項４）
請求項１〜３の効果に加え、折り重ねた連結面部（３，３）を側面部（２）に貼り着けて隣り合わせる側面部（２，２）同士を連結したので、収容物が液状物や流動物であっても、隣り合わせる側面部（２，２）間から漏れ出すような虞れが無く、例えば食品収容用の容器として好適に用いることができるなどの効果がある。
【００５０】
（請求項５）
底面部（１）を折目（８）によって内側へ凹ませることにより、容器をテーブルなどに載せた際の安定性を向上できると共に、内容物の保温効果が向上し、さらに、電子レンジでの加熱調理などが短時間で行えるなどの効果が期待できる。
【００５１】
（請求項６）
底面部の中心（１ｂ）を内側に押し込む力を生じさせるだけで、請求項５の効果を有する上げ底状の容器とすることができ、自動製函機による自動成形に極めて有用であるなどの効果がある。
【００５２】
（請求項７）
請求項１〜６の効果を有する紙製包装容器を、底面部（１）が三角形状，四角形状，五角形以上の多角形状の紙製包装容器として提供することができる。
【図面の簡単な説明】
【図１】本発明に係る紙製包装容器の実施形態の一例を示す斜視図。
【図２】図１に係る紙製包装容器の展開斜視図。
【図３】図１に係る紙製包装容器の変形例の展開斜視図。
【図４】本発明に係る紙製包装容器の実施形態の他例を示す斜視図。
【図５】図４に係る紙製包装容器の展開斜視図。
【図６】本発明に係る紙製包装容器の実施形態の他例を示す斜視図。
【図７】図６に係る紙製包装容器の展開斜視図。
【図８】本発明に係る紙製包装容器の実施形態の他例を示す斜視図。
【図９】図８に係る紙製包装容器の展開斜視図。
【図１０】本発明に係る紙製包装容器の実施形態の他例を示す斜視図。
【図１１】図１０に係る紙製包装容器の展開斜視図。
【図１２】本発明に係る紙製包装容器の実施形態の他例を示す斜視図。
【図１３】図１２に係る紙製包装容器の展開斜視図。
【図１４】本発明に係る紙製包装容器の実施形態の他例を示す斜視図。
【図１５】図１４に係る紙製包装容器の展開斜視図。
【符号の説明】
Ａ：紙製包装容器
Ｂ：ブランク
１：底面部
１ａ，２ａ，３ａ：折線
１ｂ：中心
１ｃ：角部
１ｄ：中間頂角
２：側面部
３，４：連結面部
５，６，８，１０：折目
７，９：区画面[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paper packaging container formed by bending a single blank, and in particular, connects a bottom surface, a plurality of side surfaces rising from each outer periphery of the bottom surface, and adjacent side surfaces. The present invention relates to an improvement in a structure for preventing a paper packaging container provided with a connecting surface from falling down into a side surface to which the connecting surface is attached.
[0002]
[Prior art]
Conventionally, as described in Patent Document 1, for example, this kind of container is formed of a plate-shaped body (blank) that can be bent along a fold line, and includes a base plate-shaped portion (bottom portion) and a base plate that surrounds the base plate-shaped portion. A plurality of side plate-shaped portions (side portions) rising through one folding line, and a pair of triangular adhesive plate portions (connecting surface portions) which are continuously provided so as to extend between the side plate portions and are divided by a third folding line at the center. ), Protruding outward so that the adhesive plate-like portion is bent at a third folding line at the center, attached to the side plate-like portion to connect adjacent side plate-like portions, and directed outward to the side plate-like portion. In some cases, the central side of the first fold line surrounding the base plate-shaped portion is separated toward the tip end of the side plate-shaped portion so as to generate a force in the direction of warping.
[0003]
[Patent Document 1]
JP-A-2000-33934
[0004]
[Problems to be solved by the invention]
The conventional container described above, by warping the side plate portion outwardly against the pressure of the adhesive plate-shaped portion, in an automatic box making machine, with respect to the previously molded container, An operation of sequentially stacking containers to be formed is smoothly performed, and smooth forming of the containers by an automatic box making machine is facilitated.
However, in such a conventional container, the first folding line surrounding the base plate-shaped part is formed such that the center side thereof is separated toward the tip end side of the side plate-shaped part during molding by an automatic box making machine. Is difficult.
[0005]
That is, in the conventional container, the first fold line provided between the side plate-shaped portion and the base plate-shaped portion is formed such that the center side is separated in an arc shape or a mountain shape toward the tip end side of the side plate-shaped portion. However, when the first folding line is to be formed in this way by an automatic box making machine, the case where the plate-shaped body which is a container forming material does not have a core such as a single-layer paper material is used. Although there is no problem, when a plate-like body having a core such as paperboard, cardboard, or cardboard is used, the first fold line is engraved on the plate-like body, and the side plate-like portion faces outward due to the fold. There is a possibility that the sheet will not warp.
[0006]
The present invention has been made in view of such a conventional situation, and an object thereof is to provide a paper packaging container formed by folding a single blank and forming the following with respect to a previously formed container. In order to smoothly stack the containers to be formed from above (stacking) from above, in order to make the side portions warp outwardly against the pressing of the connecting surface portion, the warpage is An object of the present invention is to provide a novel paper packaging container which can be surely performed even if the container is formed by an automatic box making machine.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a paper packaging container formed by bending a single blank (B) as described in claim 1, wherein the bottom surface portion (1) and the bottom surface (1) are provided. A plurality of side portions (2) that rise on each side of the outer periphery of the portion (1) via the fold line (1a), and are continuously provided on the side edges of the side portion (2) via the fold line (2a). 2) connecting surface portions (3, 4) attached to the outer surface and connecting adjacent side portions (2) to each other, and at least the width of the side portion (2) to which the connecting surface portions (3, 4) are attached; A vertical fold (5) is engraved substantially at the center in the direction, and the side portion (2) is formed so as to warp outward.
[0008]
In the case of such a configuration, the connection surface portions (3, 4) are adhered by adding a simple configuration in which a vertical fold (5) is engraved substantially at the center of the side surface portion (2) in the width direction. The side surface portion (2) to be bent can be made to warp outward against the pressing of the connecting surface portion (3, 4). Also, since the fold (5) is engraved in advance on the blank (B) and is not formed at the time of container molding, it is not affected at all during container molding by an automatic box making machine. Even if the blank (B) is a material having a core such as cardboard or cardboard, the side portion (2) can be warped outward.
[0009]
According to a second aspect of the present invention, the lower end portion (5 ') of the fold (5) is located at a distance from the fold line (1a) of the bottom portion, and the lower end portion (5') and the fold line (5). A fold (6, 6) is cut between both corners (1c, 1c) of 1a), and a triangular section screen () is surrounded by the fold (6, 6) and the fold line (1a). According to 7), the side portion (2) is formed so as to generate a force to warp outward.
[0010]
In the case of forming in this way, by providing the section screen (7), a state in which the side portion (2) warps outward can be naturally generated, and the effect according to claim 1 is made more effective. Can be. In addition, the ward screen (7) functions as a finger contact surface to which a user's finger is attached when holding the container, and is easier to use (easy to hold) than a case where the side surface (2) is a flat surface. There are advantages such as being able to.
[0011]
In addition, the third aspect of the present invention includes an intermediate apex angle (1d) in which an intermediate position of each side of the outer periphery of the bottom surface portion (1) is protruded outward, and the intermediate apex angle (1d) allows the side surface portion (1d) to be provided. 2) It is characterized in that it is formed so as to generate a force to warp outward.
[0012]
When formed in this way, the side portion (2) warps outward by adding a simple configuration in which the folding line (1a) is carved so as to provide the intermediate vertex (1d) on the bottom portion (1). Can occur naturally, and the effect according to claim 1 can be made more effective.
[0013]
According to a fourth aspect of the present invention, the connecting surface portion (3) forms a pair of triangular shapes which are continuously provided between adjacent side surface portions (2, 2) and are separated by a folding line (3a) at the center. The connecting surface portions (3, 3) are overlapped so as to be bent at the folding line (3a) and protruded outward, and the folded connecting surface portion (3, 3) is bent along the folding line (2a) to form a side surface portion (2). The paper packaging container is characterized in that it is a paper packaging container in which adjacent side portions (2, 2) are attached to each other by being adhered to the container.
[0014]
That is, the paper-made packaging container according to claims 1 to 3 of the present invention is provided as a connecting surface portion (3, 4) that is attached to the outer surface of the side surface portion (2) and connects the adjacent side surface portions (2). One connecting surface portion (4) is continuously connected to the side edge of either side surface portion (2) of the matching side surface portions (2, 2) via a fold line (2a), and this connecting surface portion (4) is A mode in which adjacent side sections (2, 2) are attached to the outer surface of the other side section (2) to connect adjacent side sections (2, 2), and an adjacent side section (2, 2). A connecting surface portion (3, 3) is continuously provided between both side edges of the pair, and the connecting surface portion (3, 3) forms a pair of triangular shapes separated by a folding line (3a) at the center; The connecting surface portions (3, 3) are overlapped so as to be bent at the folding line (3a), protrude outward, and are folded in two. An embodiment in which the connecting surface portions (3, 3) are bent along the fold line (2a) and are attached to the side surface portions (2) to connect the adjacent side surface portions (2, 2) (an embodiment in which two connecting surface portions are stacked) )).
The inward fall of the side surface portion due to the pressing of the connecting surface portion is more likely to occur when the connecting surface portion is formed of two sheets, and therefore, the present invention exerts a particularly remarkable effect in the aspect of claim 4. It is.
[0015]
According to a fifth aspect of the present invention, a fold (8) is formed in the bottom portion (1) radially outward from a center (1b) of the bottom portion, and the center (1b) is a vertex. The bottom portion (1) is recessed inward of the container along the fold (8) to form a raised bottom.
[0016]
In such a configuration, when the container is placed on a mounting surface such as a table surface, only the corners (1c, 1c...) Of the bottom surface contact the mounting surface to support the container. Therefore, the stability of the container is improved, the thermal conductivity between the container and the mounting surface is reduced, and an improvement in the heat retaining function can be expected. In addition, when food is stored in a container and heated by a microwave oven, the effect is that heating can be performed in a short time because the thermal conductivity with the mounting surface in the microwave oven is reduced. Can be expected.
[0017]
According to a sixth aspect of the present invention, the fold (8) is formed from the center (1b) of the bottom portion to the intermediate vertex (1d).
[0018]
In the case of such a configuration, a raised bottom-shaped bottom portion can be obtained only by generating a force in which the center (1b) of the bottom portion is pushed inward, so that a paper packaging container can be formed by an automatic box making machine. There is an advantage that it becomes easier and that a paper packaging container having a raised bottom shape can be obtained while enabling automatic molding more quickly than before.
[0019]
Although the shape of the paper packaging container according to the present invention is not particularly limited, for example, a substantially triangular prism shape in which the bottom portion (1) is triangular, and a substantially quadrangular prism shape in which the bottom portion (1) is quadrilateral. In addition, paper packaging containers of various shapes such as a polygonal prism having a pentagonal or more bottom surface (1) can be used.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of a paper packaging container according to the present invention will be described with reference to the drawings.
The paper packaging container A shown in FIG. 1 is the one according to claim 1 of the present invention. By folding and sticking a single blank B at an important point, the bottom portion 1 of the container and the outer periphery of the bottom portion 1 A plurality of side portions 2 rising on the side via the fold line 1a, and connecting surface portions 3 and 3 connected to the side edges of the adjacent side portions 2 via the fold line 2a are formed so that the upper surface is opened. It is molded as a triangular prism shaped container.
[0021]
The blank B is made of a paper base material (having a core) having a predetermined strength, such as paperboard, cardboard, or corrugated cardboard. A bottom surface portion 1 is arranged at the center of the blank B, and a plurality of side surface portions 2 are continuously provided on each side of the outer periphery via a fold line 1a.
In the case of this example, as shown in FIG. 2, a triangular bottom surface portion 1 is arranged at the center of the blank B, and three side surface portions 2 are connected to three outer peripheral sides of the blank B via folding lines 1a. . The side surface portion 2 is formed so as to gradually become wider from the folding line 1a toward the upper edge 2b.
[0022]
Further, in the present example, there are connection surfaces 3 and 3 continuously provided between the fold lines 2a of the side edges of the adjacent side surface portions 2, and these connection surface portions 3 are paired with a pair of triangles divided by the fold line 3a at the center. By forming the shape, the connecting surface portions 3 and 3 are overlapped so as to be bent at the fold line 3a and protrude outward, and the folded connection surface portions 3 and 3 are adhered to the folded side surface portion 2 along the fold line 2a to form an adjacent portion. The matching side portions 2 are connected to each other.
[0023]
The means for connecting the adjacent side portions 2, 2 is not limited to this, and as shown in FIG. 3, only the side edge of one side portion 2 of the adjacent side portions 2, 2 is provided via the folding line 2a. Alternatively, the connecting surface portions 4 may be connected to each other, and the connecting surface portions 4 may be bent along the fold line 2a and attached to the outer surface of the other side surface portion 2 to connect the adjacent side surface portions 2 to each other.
[0024]
By forming a vertical fold 5 in the width direction substantially at the center of each of the side surface portions 2, the side surface portions 2 do not fall inward due to the pressing of the bonded connection surface portions 3 and 3 or the connection surface portion 4, and thus are not folded inward. The side surface portion 2 is formed so as to warp outward.
In this example, the folded connection surfaces 3, 3 are bent in the same direction along the fold line 2a and are attached to the outer surfaces of the side surfaces 2, so that the connection surfaces 3, 3 are attached to all the side surfaces 2. As a result, the folds 5 are carved on all the side parts 2.
[0025]
In the paper packaging container of this embodiment having such a configuration, the folded connection surfaces 3 and 3 are attached to the side surface 2 in the assembled state (formed state) shown in FIG. Or a fluid, there is no danger of leaking from between the adjacent side portions 2.
[0026]
Further, with a simple configuration in which a fold 5 is added to the side surface portion 2, the side surface portion 2 warps outwardly against the pressing of the attached connection surface portions 3, 3, and the inside of the side surface portion 2 is bent. Falling can be prevented.
Therefore, the operation of sequentially stacking (stacking) the containers to be molded next from the container that has been molded first can be smoothly performed, and paper that can be easily and quickly automatically molded by an automatic box making machine can be obtained. It can be made into a packaging container.
[0027]
The paper packaging container A shown in FIGS. 4 and 5 relates to the first aspect of the present invention, wherein the bottom surface portion 1 of the paper packaging container shown in FIGS. 1 and 2 has a square shape.
That is, in this example, four side portions 2 are continuously provided on the four sides of the outer surface of the square bottom portion 1 via the folding line 1a, and the folded connection surface portions 3 and 3 are oriented along the folding line 2a. And attached to the outer surfaces of the pair of side surfaces 2 opposed to each other. Therefore, the fold 5 is formed only on the two opposing side surfaces 2.
[0028]
Therefore, also in this example, the side surface portion 2 warps outward against the pressing of the attached connecting surface portions 3 and 3 to prevent the side surface portion 2 from falling into the inside, and is easily formed by the automatic box making machine. In addition, a paper packaging container that can be automatically molded quickly can be obtained.
The other configuration, operation, and effect are basically the same as those of the examples shown in FIGS. 1 and 2, and thus duplicated illustration and description will be omitted.
[0029]
The example shown in FIGS. 6 and 7 relates to the second aspect of the present invention, in which a section screen 7 is added to the side part 2 in the paper packaging container shown in FIGS.
That is, in the paper packaging container A of this example, the lower end 5 ′ of the fold 5 is located apart from the fold line 1 a on the outer periphery of the bottom surface, and the lower end 5 ′ and the corners at both ends of the fold line 1 a are located. Folds 6 and 6 are engraved between the portions 1c and 1c, and a triangular section screen 7 surrounded by the folds 6 and 6 and the fold line 1a forces the side portion 2 to warp outward. Is formed naturally.
[0030]
Therefore, in this example, the side surface portion 2 naturally warps outward against the pressing of the attached connection surface portions 3 and 3, and the inward falling of the side surface portion 2 is more reliably prevented, and A paper packaging container that can make automatic molding by a box making machine easier and faster can be provided.
Further, when forming the blank B, a simple configuration in which the folds 6 and 6 are carved on the side surface portion 2 allows the side portion 2 to naturally bend outwardly, and the above-described effect is obtained. Obtainable.
Further, in this example, the section screen 7 functions as a finger contact surface to which the user's finger is attached when holding the container, and has advantages such as easy use compared to the case where the side surface portion 2 is a flat surface.
If the blank B is made of paperboard such as corrugated cardboard, the blank B will have an eye 100 of the paper material, and the eye 100 will be bent along the vertical or horizontal folding lines 1a and 2a. When they are in a substantially parallel or substantially orthogonal direction, the fold line parallel to the eye 100 is easily broken, and the orthogonal fold line is hard to be broken. Therefore, in the blank B used for the seed paper packaging container, as shown in each figure, it is considered that the eye 100 crosses the vertical or horizontal folding lines 1a and 2a at a predetermined angle. I have. For this reason, during molding or use of the container, a fold may be formed along the eye 100 and the appearance may be deteriorated. On the other hand, in this example, since the fold 6 is engraved in advance on the side surface portion 2, there is an advantage that the fold along the eye 100 can be prevented as much as possible.
The size of the section screen 7 is determined by a line x (in this example, a fold line 1a) connecting both end corners 1c, 1c, which is a bottom side of the section screen 7, and a fold 5 from an intermediate point of the line x. It is preferable that the ratio with the line y connecting the lower end portion 5 'is x: y = 10: 3 or more, and in the case of the paper packaging container A in the illustrated example, x: y = about 10: 5. Is preferred.
The other configuration, operation, and effect are basically the same as those of the above-described example, and duplicated illustration and description will be omitted.
[0031]
The examples shown in FIGS. 8 and 9 relate to the second aspect of the present invention, in which a section screen 7 is added to the side surface portion 2 in the paper packaging container shown in FIGS.
That is, in the paper packaging container A of this example, the lower end 5 ′ of the fold 5 engraved on the two opposing side surfaces 2 to which the connecting surfaces 3 are attached is separated from the fold line 1a. At the same time, folds 6, 6 are formed between the lower end 5 'and the corners 1c, 1c at both ends of the fold line 1a, and a triangular shape surrounded by the folds 6, 6 and the fold line 1a is formed. Are formed such that a force that warps outwardly on the side surface portion 2 naturally occurs.
[0032]
Therefore, also in this example, the side surface portion 2 naturally warps outward against the pressing of the attached connecting surface portions 3 and 3, and the inward falling of the side surface portion 2 is more reliably prevented, and A paper packaging container that can make automatic molding by a box making machine easier and faster can be provided. In addition, the section screen 7 functions as a finger contact surface to which the user's finger is attached when holding the container, and has advantages such as easy use as compared with the case where the side surface portion 2 is a flat surface.
The other configuration, operation, and effect are basically the same as those of the above-described example, and duplicated illustration and description will be omitted.
[0033]
The examples shown in FIGS. 10 and 11 relate to the third aspect of the present invention, and have the paper packaging container shown in FIGS. 1 and 2 in which an intermediate vertex angle 1 d and a fold 8 are added to the bottom surface 1. .
That is, in the paper packaging container A of this example, the bottom surface portion 1 has an intermediate vertex angle 1d in which an intermediate position of three sides of the outer periphery of the triangle protrudes outward, and the lower end portion 5 ′ of the fold 5 is in the middle. The ridge 5 is formed so as to be in contact with the apex angle 1d, and the intermediate apex angle 1d is naturally formed such that a force is generated on the side surface portion 2 so that each fold 5 is warped outward at the vertex.
[0034]
Further, the paper packaging container A of this example has a fold 8 which is radial (Y-shaped) from the center 1b of the bottom portion to each intermediate vertex angle 1d on the bottom portion 1, and the center 1b is The bottom portion 1 is recessed into the inside of the container along the fold 8 so as to be a vertex, and is formed in a raised bottom shape.
[0035]
Therefore, also in this example, the side surface portion 2 naturally warps outward against the pressing of the attached connecting surface portions 3 and 3, and the inward falling of the side surface portion 2 is more reliably prevented, and A paper packaging container that can make automatic molding by a box making machine easier and faster can be provided.
Further, when forming the blank B, a simple configuration in which the folding line 1a is carved to add the intermediate vertex angle 1d to the bottom surface portion 1 so that a force that warps outward to the side surface portion 2 naturally occurs. The above-described effects can be obtained.
[0036]
Also, in this example, since the radial fold 8 extending from the center 1b to the intermediate vertex 1d is formed on the bottom portion 1, the center 1b of the bottom portion 1 is set to the center 1b in the automatic forming process of the container by the automatic box making machine. The bottom portion 1 is naturally depressed along the fold line 8 by simply causing the force to be pressed inward, so that a raised bottom paper packaging container can be obtained easily and reliably.
Therefore, when the paper packaging container A is placed on a flat surface such as a table, only the corners 1c, 1c,. Performance can be improved. Furthermore, in order to improve the heat retaining effect of the container, the above-mentioned raised bottom shape has the advantage that the container can be easily molded at the time of automatic molding.
Incidentally, such a raised bottom container is, when the food and the like is heated by a microwave oven, because the thermal conductivity between the mounting surface in the microwave oven is reduced, and the like, An effect such as heating in a short time can be expected.
As the degree of the raised bottom, a line x (a virtual line x in this example) connecting the adjacent corners 1c, 1c of the bottom portion 1 is connected to a lower end 5 ′ of the fold 5 from an intermediate point of the line x. The ratio to the line y is preferably x: y = 10: 3 or more, and in the paper packaging container A having the shape of the illustrated example, it is preferable that x: y = 10: 5.
The other configuration, operation, and effect are basically the same as those of the above-described example, and duplicated illustration and description will be omitted.
[0037]
The examples shown in FIGS. 12 and 13 relate to the third aspect of the present invention, in which an intermediate vertex 1 d and a fold 8 are added to the bottom surface portion 1 in the paper packaging container shown in FIGS. .
That is, in the paper packaging container A of this example, the bottom portion 1 is provided with an intermediate vertex 1d in which an intermediate position of the four sides of the quadrilateral is projected outward, and the lower end portion 5 ′ of the fold 5 has the intermediate vertex. 1d, and the intermediate vertex angle 1d is formed so that a force is naturally generated on the side surface portion 2 so that each fold 5 is bent outward.
[0038]
In the paper packaging container A of this example, a fold 8 which is radial (cross-shaped) is formed in the bottom portion 1 from the center 1b of the bottom portion to each intermediate vertex 1d, and the center 1b is located at the top. The bottom portion 1 is recessed inward of the container along the fold 8 so as to form a raised bottom.
[0039]
Therefore, also in this example, the side surface portion 2 naturally warps outward against the pressing of the attached connecting surface portions 3 and 3, and the inward falling of the side surface portion 2 is more reliably prevented, and A paper packaging container that can make automatic molding by a box making machine easier and faster can be provided.
Further, when forming the blank B, a simple configuration in which the folding line 1a is carved to add the intermediate vertex angle 1d to the bottom surface portion 1 so that a force that warps outward to the side surface portion 2 naturally occurs. The above-described effects can be obtained.
[0040]
Also in this example, since the radial fold 8 extending from the center 1b to the intermediate vertex 1d is formed on the bottom portion 1, the center 1b of the bottom portion 1 is set in the container automatic forming process by the automatic box making machine. The bottom portion 1 is naturally depressed along the fold line 8 by simply causing the force to be pressed inward, so that a raised bottom paper packaging container can be obtained easily and reliably.
The other configuration, operation, and effect are basically the same as those of the above-described example, and thus redundant description and illustration are omitted.
[0041]
The examples shown in FIGS. 14 and 15 relate to claim 3 of the present invention, in which a section screen 9 is added to the side surface portion 2 in the paper packaging container shown in FIGS.
That is, in this example, the intermediate vertex angle 1d of the bottom portion 1 naturally causes the side portion 2 to warp outwardly, and the bottom portion 1 extends from the middle portion of the folding line 2a on the left and right side edges of the side portion 2. Folds 10, 10 are engraved over the middle vertex angle 1 d of the portion 1, and a triangular section screen 9 surrounded by the folds 10, 10 and the fold lines 1 a, 2 a is formed at the lower portion on the left and right sides of the side portion 2. It was done.
[0042]
According to this example, the ward screens 9 and 9 function as finger contact surfaces to which the user's finger is attached when holding the container, and there are advantages such as easier use compared to the case where the side surface portion 2 is a flat surface. . The folds 10 and 10 have the same effect as the fold 6.
The other configuration, operation, and effect are basically the same as those of the above-described example, and duplicated illustration and description will be omitted.
[0043]
In each of the above-described examples, the side surface portion 2 where the fold 5 is carved is not limited to the side surface portion 2 to which the connecting surface portions 3 and 4 are attached, but the side surface portion 2 to which the connecting surface portions 3 and 4 are not attached. May also be engraved, which is optional.
[0044]
Also, in each of the examples shown in FIGS. 4 to 15, as shown in FIG. 3, the connecting surface portion 4 is continuously provided only on one side edge of the adjacent side surface portion 2, and the connecting surface portion 4 is connected to the other side surface portion. It is needless to say that the side portions 2 that are adjacent to each other may be connected to each other by being attached to the outer surface of the second side.
[0045]
As mentioned above, although the example of the embodiment of the present invention has been described with reference to the drawings, the paper packaging container according to the present invention is not limited to the illustrated example, and the technical idea described in each claim of the claims is not limited. It goes without saying that various changes are possible in the category.
[0046]
【The invention's effect】
Since the paper packaging container according to the present invention is configured as described above, the following effects can be obtained.
[0047]
(Claim 1)
By extremely simple and inexpensive means of engraving the folds (5) on the blank (B), it is possible to prevent the side portions (2) from falling into the inside and to press the connecting surface portions (3, 4). The side portion (2) can be warped outward in opposition. Also, since the fold (5) is cut in advance in the blank (B) and is not formed at the time of forming the container, the fold (5) is not affected at all when the container is formed by the automatic box making machine. Even if (B) is a material having a core such as cardboard or cardboard, the side surface portion (2) can be made to warp outward.
Therefore, it was possible to provide a paper packaging container which is extremely effective for automatic molding by an automatic box making machine without affecting the material of the blank (B).
[0048]
(Claims 2 and 3)
By providing the triangular section screen (7) or the intermediate apex angle (1d) of the bottom part, the side part (2) naturally projects outward, so that the effect of claim 1 is more effective. And
In addition, the triangular section screen (7) functions as a finger contact surface to which the user's finger is attached when holding the container, and has an effect that the container can be made easy to use.
[0049]
(Claim 4)
In addition to the effects of claims 1 to 3, since the folded connecting surface portions (3, 3) are attached to the side surface portions (2) and the adjacent side surface portions (2, 2) are connected to each other, the container is a liquid material. Or fluid, there is no danger of leaking out from between the adjacent side surfaces (2, 2), and there is an effect that it can be suitably used as a container for storing food, for example.
[0050]
(Claim 5)
By indenting the bottom portion (1) inward by the folds (8), stability when the container is placed on a table or the like can be improved, the heat retaining effect of the contents can be improved, and furthermore, the microwave oven can be used. The effect that heating cooking etc. can be performed in a short time can be expected.
[0051]
(Claim 6)
By merely generating a force for pushing the center (1b) of the bottom portion inward, it is possible to obtain a raised bottom container having the effect of claim 5, which is extremely useful for automatic molding by an automatic box making machine. There is.
[0052]
(Claim 7)
The paper packaging container having the effects of the first to sixth aspects can be provided as a paper packaging container whose bottom surface (1) has a triangular, square, pentagonal or higher polygonal shape.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of an embodiment of a paper packaging container according to the present invention.
FIG. 2 is an exploded perspective view of the paper packaging container according to FIG. 1;
FIG. 3 is an exploded perspective view of a modified example of the paper packaging container according to FIG. 1;
FIG. 4 is a perspective view showing another example of the embodiment of the paper packaging container according to the present invention.
FIG. 5 is an exploded perspective view of the paper packaging container according to FIG. 4;
FIG. 6 is a perspective view showing another example of the embodiment of the paper packaging container according to the present invention.
FIG. 7 is an exploded perspective view of the paper packaging container according to FIG. 6;
FIG. 8 is a perspective view showing another example of the embodiment of the paper packaging container according to the present invention.
9 is an exploded perspective view of the paper packaging container according to FIG.
FIG. 10 is a perspective view showing another example of the embodiment of the paper packaging container according to the present invention.
11 is an exploded perspective view of the paper packaging container according to FIG.
FIG. 12 is a perspective view showing another example of the embodiment of the paper packaging container according to the present invention.
13 is an exploded perspective view of the paper packaging container according to FIG.
FIG. 14 is a perspective view showing another example of the embodiment of the paper packaging container according to the present invention.
FIG. 15 is an exploded perspective view of the paper packaging container according to FIG. 14;
[Explanation of symbols]
A: Paper packaging container
B: Blank
1: Bottom part
1a, 2a, 3a: broken line
1b: center
1c: corner
1d: middle apex angle
2: Side part
3, 4: Connection surface
5,6,8,10: fold
7, 9: Ward screen

Claims

A paper packaging container (A) formed by bending one blank (B),
A bottom portion (1), a plurality of side portions (2) rising through folding lines (1a) on each side of the outer periphery of the bottom portion (1), and a folding line (2a) on a side edge of the side portion (2). Connecting surface portions (3, 4) attached to the outer surface of the side surface portion (2) to connect adjacent side surface portions (2) to each other,
At least a longitudinal fold (5) is engraved at the approximate center in the width direction of the side surface portion (2) to which the connecting surface portions (3, 4) are attached so that the side surface portion (2) warps outward. A paper packaging container characterized by being formed.

The lower end portion (5 ') of the fold (5) is located apart from the fold line (1a) of the bottom portion, and both end corners (1c, 1c) of the lower end portion (5') and the fold line (1a) are provided. 1c), folds (6, 6) are engraved, and a triangular section screen (7) surrounded by the folds (6, 6) and the fold line (1a) forms the side portion (2). 2. The paper packaging container according to claim 1, wherein the paper packaging container is formed so as to generate an outwardly curling force.

An intermediate vertex angle (1d) is formed by projecting an intermediate position of each side of the outer periphery of the bottom surface portion (1) outward, and the intermediate vertex angle (1d) exerts a force that warps the side surface portion (2) outward. The paper packaging container of claim 1 formed to produce.

The connecting surface portions (3, 3) are formed continuously over the adjacent side surface portions (2, 2), and form a pair of triangular shapes separated by a folding line (3a) at the center. Are folded along the fold line (3a), projected outward, and the foldable connecting surface portions (3, 3) are bent along the fold line (2a), and are adhered to the side surface portions (2) to be adjacent side surface portions. The paper packaging container according to any one of claims 1 to 3, wherein (2, 2) is connected to each other.

A fold (8) radially outward from the center (1b) of the bottom portion is engraved on the bottom portion (1), and the fold (8) is formed so that the center (1b) is a vertex. The paper packaging container according to any one of claims 1 to 4, wherein the bottom portion (1) is recessed toward the inside of the container to form a raised bottom.

The paper packaging container according to claim 5, wherein the fold (8) is cut radially from the center (1b) of the bottom portion to the intermediate vertex (1d).

The paper packaging container according to any one of claims 1 to 6, wherein the bottom portion (1) has a polygonal shape of a triangle or more.