JP2005008176A

JP2005008176A - Folding container

Info

Publication number: JP2005008176A
Application number: JP2003172280A
Authority: JP
Inventors: Yasushi Takase; 泰高瀬
Original assignee: Mitsubishi Plastics Inc
Current assignee: Mitsubishi Plastics Inc
Priority date: 2003-06-17
Filing date: 2003-06-17
Publication date: 2005-01-13
Anticipated expiration: 2023-06-17
Also published as: JP4293843B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding container which can protect a housed article by forming the internal surfaces of the container into smooth surfaces, of which the folding or the building up can easily be performed, and the strength of which under a built-up state can be increased as well. <P>SOLUTION: This folding container of a hexahedron structure is equipped with an upper frame 11, a bottom plate 12, a pair of side plates 14 and a pair of gate plates 13, and the upper sections of the side plates and the upper sections of the gate plates are respectively connected with the upper frame under a turnable state to the internal side of the container. In the folding container, the upper end part of a hinge plate 15 which is provided on the outside of the side plate 14 is turnably connected with the external surface of the intermediate section in the vertical direction of the side plate 14. At the same time, a hinge pin 16 which is provided at the lower end part of the hinge plate 15 is connected with a slit-shape hinge hole 17 having a longer axis in the inside-outside direction of the container which is provided on the edge part of the bottom plate 12 under a state wherein the hinge pin 16 can turn to the internal side of the container, and also, can move in the inside-outside direction of the container. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、折り畳みコンテナに関し、詳しくは、特に、柔らかい物品やフィルム袋等に充填された液体状乃至ゲル状の物品を収納するのに適した構造を有する折り畳みコンテナに関する。
【０００２】
【従来の技術】
従来から、折り畳みコンテナとして、上枠（フレーム）及び底板と、上枠及び底板に対してそれぞれ回動可能に取付けられ、かつ、連結部にて内側へ折曲がるように連結された上下一対の側板と、上枠に対して回動可能に取付けられたあおり板とから構成されたものが知られている（例えば、特許文献１参照。）。
【０００３】
このような折り畳みコンテナは、折り畳まれた状態で上枠を上方に持上げ、両側板の連結部を伸ばした状態にした後、両あおり板を両側板間に立てて直立状態にすることにより箱状に組み立てることができ、逆に両あおり板を上枠に対して内方に回動させた後、両側板の連結部を内方に折曲げることにより折り畳むことができる。
【０００４】
【特許文献１】
特公平７−５１３３号公報
【０００５】
【発明が解決しようとする課題】
しかし、従来の折り畳みコンテナは、組み立てて物品を収納した状態でコンテナ上方から荷重が加わると、側板の連結部がコンテナの内方あるいは外方に屈曲した状態となる。したがって、収納物がフィルム袋等に充填された液体状乃至ゲル状のもの、例えば、醤油、油等である場合、さらに、これらが常温乃至低温で固化するもの、例えば、マーガリン、バター、チョコレート等を収納して保管、運搬した場合に、側板の屈曲によって収納物が変形してしまうおそれがあり、また、収納状態で固化してしまうとコンテナ内からの取り出しが困難になるという問題があった。さらに、連結部の状態によっては外面が柔らかい物品を傷つけてしまうこともある。このため、前述のような物品は、プラスチック製あるいは段ボール製の一体型の収納容器に収納するようにしていたが、物品を取り出した後の収納容器の処理に大きな問題があった。
【０００６】
そこで本発明は、コンテナ内面を平滑面とすることによって収納した物品を保護することができるとともに、折り畳みや組み立てを容易に行うことができ、組立状態での強度も向上させることができる折り畳みコンテナを提供することを目的としている。
【０００７】
【課題を解決するための手段】
上記目的を達成するため、本発明の折り畳みコンテナは、第１の構成として、相対向する方形状の上枠及び底板と、該上枠及び底板の上下に対向する二辺間をそれぞれ閉塞する一対の側板及び一対のあおり板とを備え、前記側板の上部及び前記あおり板の上部を上枠に対してコンテナ内側に回動可能な状態でそれぞれ連結した六面体構造の折り畳みコンテナにおいて、前記側板の外側に設けたヒンジ板の上端部を該側板の上下方向中間部外面に回動可能に連結するとともに、該ヒンジ板の下端部に設けたヒンジピンを、前記底板の縁部に設けたコンテナ内外方向に長軸を有する長円形状のヒンジ穴にコンテナ内側に回動可能かつコンテナ内外方向に移動可能な状態で連結したことを特徴としている。
【０００８】
さらに、この第１の構成を有する折り畳みコンテナにおいて、前記ヒンジ板の上端部と前記側板の上下方向中間部外面との連結部は、前記側板の外面に設けた支軸と、ヒンジ板の上端部に設けたヒンジ溝とを係合させたものであって、前記ヒンジ溝は、前記側板を立てたコンテナ組立状態のときに側板外面に沿った状態のヒンジ板の上端部をコンテナ外方から内方に向けて前記支軸を包囲するようにＵ字状に屈曲させ、ヒンジ溝の開口が底板方向を向くように形成し、該組立状態で側板外面に対向するヒンジ溝の外面に上枠方向が平面状となった係合突起を設けるとともに、前記側板外面には、組立状態で前記突起の平面状部分に係合する底板方向を向いた平面状係合部を設けたことを特徴としている。
【０００９】
また、本発明の折り畳みコンテナの第２の構成は、相対向する方形状の上枠及び底板と、該上枠及び底板の上下に対向する二辺間をそれぞれ閉塞する一対の側板及び一対のあおり板とを備え、前記側板の上部及び前記あおり板の上部を上枠に対してコンテナ内側に回動可能な状態でそれぞれ連結した六面体構造の折り畳みコンテナにおいて、前記側板が設けられる上枠と底板との間に、該上枠及び底板に対してコンテナ内側に回動可能な状態で連結され、かつ、上下方向中間部の連結部で内側へ折れ曲がるように連結された上下一対のヒンジ板からなるヒンジ部品を前記側板の外面に沿うようにして設けるとともに、下部ヒンジ板の上端を前記連結部を超えて上方に延出したことを特徴としている。
【００１０】
さらに、本発明の折り畳みコンテナは、前記第１、第２の構成において、前記ヒンジ板が前記側板よりも幅狭に形成されており、側板の幅方向に複数個が設けられていること、前記側板の上部と前記上枠とに、コンテナ組立状態のときに、互いに係合して側板と上枠との離反方向の力を受ける係合部をそれぞれ設けたこと、前記側板の上部と前記上枠とに、コンテナ組立状態のときに、互いに係合して側板と上枠との圧縮方向の力を受ける係合部をそれぞれ設けたこと、前記側板の下部と前記底板とに、コンテナ組立状態のときに、互いに係合して側板と底板との離反方向の力を受ける係合部をそれぞれ設けたことを特徴としている。
【００１１】
【発明の実施の形態】
図１乃至図５は、本発明の折り畳みコンテナの第１形態例を示すもので、図１は組立状態の折り畳みコンテナを示す断面正面図、図２は折り畳み状態の折り畳みコンテナを示す断面正面図、図３は組立状態の折り畳みコンテナを示す一部断面側面図、図４は上枠、底板、側板及びヒンジ板の連結状態を拡大して示す要部の断面正面図、図５は側板下端部と底板との関係を拡大して示す要部の断面正面図である。図６及び図７は、第１形態例を示す折り畳みコンテナの変形例を示すもので、図６は折り畳み途中の状態を示す折り畳みコンテナの断面正面図、図７は折り畳み状態を示す折り畳みコンテナの断面正面図である。
【００１２】
まず、図１乃至図５において、折り畳みコンテナは、平面視長方形状の上枠１１及び底板１２と、上枠１１の対向する短辺側にそれぞれ回動可能に設けられた一対のあおり板１３と、上枠１１の長辺側にそれぞれ回動可能に連結された一対の側板１４とを有する六面体構造の折り畳みコンテナであって、あおり板１３は上枠１１の短辺に対して複数箇所の連結部１３ａで、側板１４の上部は上枠１１の長辺に本形態例では三箇所の連結部１４ａで、それぞれコンテナ内側に回動可能な状態でそれぞれ連結されるとともに、底板１２の長辺と側板１４の上下方向中間部外面との間には、底板１２と側板１４とを連結するためのヒンジ板１５が三箇所に設けられている。
【００１３】
ヒンジ板１５は、下端部に設けたヒンジピン１６を底板１２の縁部に設けたヒンジ穴１７に係合させてコンテナ内側に回動可能な状態で係合させている。前記ヒンジピン１６は底板１２の長辺に平行な方向に設けられており、前記ヒンジ穴１７は、コンテナ内外方向に長軸を有する長円形状となっている。したがって、ヒンジ板１５の下端部は、ヒンジ穴１７の長円方向に沿ってコンテナ内外方向に移動可能な状態となっている。
【００１４】
また、ヒンジ板１５の上部は、側板１４の外面に設けた水平方向の支軸１８に、ヒンジ板１５の上端部に設けたヒンジ溝１９を回動可能な状態で係合させている。ヒンジ溝１９は、前記側板１４を立てたコンテナ組立状態のときに、側板外面に沿った状態のヒンジ板１５の上端部をコンテナ外方から内方に向けて前記支軸１８を包囲するようにＵ字状に屈曲させ、ヒンジ溝１９の開口が底板方向を向く形状を有している。
【００１５】
この折り畳みコンテナは、図１に示す組立状態で、両あおり板１３の下部を内側に回動させた後、側板１４の下部を内側に回動させると、ヒンジ板１５の上部がコンテナ内側方向に回動し、側板１４とヒンジ板１５とが折れ曲がるようにしてコンテナ内側に入り込み、図２に示すように、あおり板１３、側板１４及びヒンジ板１５が、上枠１１と底板１２との間に折り畳まれた状態となる。この折り畳み状態で上枠１１を上方に持ち上げ、側板１４とヒンジ板１５とを伸ばすようにして両側板１４を立てた状態にした後、両あおり板１３を回動させて両側板１４間に立てた状態にすることにより、図１に示すように、あおり板１３及び側板１４が略直立状態となり、上枠１１及び底板１２の上下に対向する二辺間があおり板１３及び側板１４によってそれぞれ閉塞された六面体形状の箱型に組み立てることができる。この組立状態では、あおり板１３の両側縁部が両側板１４の内面に接した状態となり、側板１４を内部側から押圧して側板１４が内側に回動しないように保持した状態となる。
【００１６】
この折り畳みコンテナは、組立状態におけるコンテナ内面が、一枚板からなるあおり板１３及び側板１４の四面で囲まれた状態となり、従来の折り畳みコンテナのような側板の連結部がコンテナ内面側に存在しないので、コンテナ内面を平滑面とすることができる。このようにしてコンテナ内面を平滑面とすることにより、コンテナ内に収納した物品を変形させたり、損傷させたりすることがなくなり、収納した物品を保護することができるとともに、運搬中等に物品が固化した場合でも容易に取り出すことができるようになる。さらに、多段積み時の上方からの荷重をあおり板１３及び側板１４の両方で受けることができるので、従来のようにあおり板のみで受けるものに比べて荷重強度を大幅に向上させることができる。
【００１７】
また、コンテナを折り畳んだり、組み立てたりするときに、ヒンジ板１５のヒンジピン１６が係合する底板１２のヒンジ穴１７を底板に対して略平行な長円形状としているので、図６及び図７に示すように、折り畳みコンテナの短辺側寸法と高さ寸法との関係により、コンテナを折り畳んだり、組み立てたりする際に側板１４の下端部同士が衝突するような場合であっても、ヒンジ板１５の下端部がコンテナ内外方向に移動して側板１４が回動し、側板下端部同士がずれるから衝突時の衝撃を緩和することができるとともに、コンテナの折り畳みや組み立てを円滑に行うことができる。また、折り畳み状態で上枠１１と底板１２との相互の位置ずれが起こっても、長円形状からなるヒンジ穴１７で位置ずれを吸収できるので、ヒンジ板１５に加わる力を逃がすことができる。しかも、図７に示すように、折り畳んだ状態で各ヒンジ穴１７に対する各ヒンジピン１６の位置が両側でそれぞれずれることにより、両側板１４を重ね合わせた状態で折り畳むことができる。
【００１８】
さらに、図４に示すように、ヒンジ板１５の上端部と側板１４の外面との連結部、側板１４の上端部と上枠１１との間、側板１４の下端部と底板１２との間のそれぞれに、組み立て時のコンテナを補強するための係合部を設けている。まず、ヒンジ板１５と側板１４との連結部には、組立状態で側板１４の外面に対向するヒンジ溝１９の外面に上枠１１方向が平面状となった係合突起２１を設けるとともに、側板１４の外面には、組立状態で前記係合突起２１の平面状部分に係合する底板１２方向を向いた平面状係合部２２を設けている。このような係合突起２１と平面状係合部２２とを設けることにより、組み立て時に両者が係合してヒンジ溝１９の側板１４側を補強することができる。これにより、物品を収納した状態で上枠１１を持ち上げたときに、支軸１８とヒンジ溝１９とにヒンジ溝１９を開く方向、すなわち、ヒンジ溝１９の側板１４側を上方に引き伸ばす方向の力が作用しても、係合突起２１と平面状係合部２２との係合によってヒンジ溝１９の側板側が引き伸ばされることがなくなり、両者の係合状態を確実に保持することができる。
【００１９】
また、側板１４と上枠１１との間には、側板１４の上端部に、組み立て時にコンテナ内側を向き、下方が平面状となった係合爪２３を幅方向全長に設けるとともに、上枠１１には、組み立て時に前記係合爪２３の下向き平面部が係合する上向きの係合突状２４を幅方向全長に設けている。前記係合爪２３は組み立て時に側板１４が所定位置に回動すると前記係合突状２４に係合し、側板１４と上枠１１との離反方向の力、すなわち、物品を収納した状態で上枠１１を持ち上げたとき生じる力をこの係合爪２３と係合突状２４との係合によって確実に受けることができ、連結部１４ａに掛かる負担を軽減することができる。
【００２０】
さらに、側板１４と上枠１１との間には、側板上部外面に突出する側板幅方向の突状部２５を設けるとともに、上枠１１の長辺部分に側板１４の外側に位置するリブ２６を設け、コンテナ組み立て時に、リブ２６の下面に突状部２５の上面が係合するようにしている。これにより、組み立てたコンテナを積み上げたときに上枠１１から側板１４に向かって掛かる圧縮方向の荷重をリブ２６と突状部２５との係合によって側板１４の略全体で受けることができるので、側板１４の連結部１４ａに掛かる荷重を軽減することができる。
【００２１】
側板１４と底板１２との間には、図５に拡大して示すように、側板１４の下端部外面に側板幅方向の突出縁２７を設けるとともに、底板１２の長辺部分には、組み立て時に前記突出縁２７の上部に位置する折返片２８を設けている。したがって、コンテナ組み立て時には、突出縁２７と折返片２８とが係合して側板１４と底板１２とが一体化した状態となるので、物品を収納した状態で上枠１１を持ち上げたときに底板１２にかかる側板１４と底板１２とが離反する方向の荷重を、両者の係合によって側板１４で受けることができるので、ヒンジ板１５に大きな引っ張り荷重がかかることを防止できる。
【００２２】
図８及び図９は、本発明の折り畳みコンテナの第２形態例を示すもので、図８は組立状態を示す折り畳みコンテナの断面正面図、図９は折り畳み途中の状態を示す折り畳みコンテナの断面正面図である。なお、以下の説明において、前記第１形態例で示した折り畳みコンテナにおける構成要素と同一の構成要素には、それぞれ同一符号を付して詳細な説明は省略する。
【００２３】
本形態例に示す折り畳みコンテナは、側板１４の外部に、上枠１１の長辺にコンテナ内側に回動可能に連結された上部ヒンジ板３１と、底板１２の長辺にコンテナ内側に回動可能に連結された下部ヒンジ板３２とを、上下方向中間部に設けた連結部３３にてコンテナ内側に折れ曲がるように形成した上下一対のヒンジ板３１，３２からなるヒンジ部品３４を組み立て時に側板１４の外面に沿うようにして設けるとともに、下部ヒンジ板３２の上端を前記連結部３３を超えて上方に延出させて延出部３５を設けている。
【００２４】
このように下部ヒンジ板３２の上端に延出部３５を設けておくことにより、図９に示すように、コンテナを折り畳む際に、延出部３５の上端が側板１４の外面に接触して側板１４を押し上げながらコンテナ内側に折れ曲がり、ヒンジ部品３４の折れ角よりも先に側板１４が回動して折り畳まれた状態になるので、側板１４の下端が底板１２の上面から離れた状態となる。
【００２５】
したがって、折り畳む際に側板１４の下端部同士が衝突するような寸法関係を有するコンテナの場合であっても、それぞれの延出部３５の長さを変えることにより、側板１４の下端部同士が衝突することがなくなり、また、回動時の側板１４の下端部が底板１２の上面に接触しないので、コンテナの折り畳みや組み立てをより円滑に行うことができる。さらに、上部ヒンジ板３１や下部ヒンジ板３２は、コンテナを折り畳んだ状態では、前記第１形態例のヒンジ板１５と同様に、底板１２の上面に沿った状態になるので、折り畳み体積が増加することもほとんどない。
【００２６】
さらに、本形態例においても、側板１４の上端部と上枠１１との間、側板１４の下端部と底板１２との間に、前記第１形態例と同様の構造を採用しておくことにより、組立状態でのコンテナの強度を向上させることができる。なお、両形態例において、ヒンジ板１５やヒンジ部品３４の形状や設置数は任意であり、側板１４の幅寸法や高さ寸法に応じてこれらを選択することができる。また、上枠１１には、開閉可能な蓋を設けておくこともできる。
【００２７】
【発明の効果】
以上説明したように、本発明の折り畳みコンテナによれば、コンテナ内面を平滑な状態にすることができるとともに、組み立てや折り畳みを円滑に行うことができ、さらに、組立状態におけるコンテナの強度も向上させることができる。したがって、フィルム袋等に充填された液体状乃至ゲル状の醤油や油等、これらが常温乃至低温で固化するマーガリン、バター、チョコレート等を収納して保管、運搬するための収納容器として最適である。
【図面の簡単な説明】
【図１】本発明の折り畳みコンテナの第１形態例を示す組立状態の断面正面図である。
【図２】同じく折り畳み状態の折り畳みコンテナを示す断面正面図である。
【図３】同じく組立状態の折り畳みコンテナを示す一部断面側面図である。
【図４】上枠、底板、側板及びヒンジ板の連結状態を拡大して示す要部の断面正面図である。
【図５】側板下端部と底板との関係を拡大して示す要部の断面正面図である。
【図６】折り畳みコンテナの変形例を示す折り畳み途中の状態を示す断面正面図である。
【図７】同じく折り畳み状態を示す折り畳みコンテナの断面正面図である。
【図８】本発明の折り畳みコンテナの第２形態例を示す組立状態の断面正面である。
【図９】同じく折り畳み途中の折り畳みコンテナを示す断面正面図である。
【符号の説明】
１１…上枠、１２…底板、１３…あおり板、１３ａ…連結部、１４…側板、１４ａ…連結部、１５…ヒンジ板、１６…ヒンジピン、１７…ヒンジ穴、１８…支軸、１９…ヒンジ溝、２１…係合突起、２２…平面状係合部、２３…係合爪、２４…係合突状、２５…突状部、２６…リブ、２７…突出縁、２８…折返片、３１…上部ヒンジ板、３２…下部ヒンジ板、３３…連結部、３４…ヒンジ部品、３５…延出部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a folding container, and more particularly to a folding container having a structure suitable for storing a liquid or gel-like article filled in a soft article or a film bag.
[0002]
[Prior art]
Conventionally, as a folding container, a pair of upper and lower side plates that are pivotally attached to the upper frame and the bottom plate, and are connected to the upper frame and the bottom plate so as to be bent inward at the connecting portion. And a tilt plate attached to the upper frame so as to be rotatable (see, for example, Patent Document 1).
[0003]
In such a folded container, the upper frame is lifted upward in the folded state, the connecting portions of both side plates are extended, and then the two side plates are placed in an upright state between the two side plates. On the contrary, after both the tilting plates are turned inward with respect to the upper frame, they can be folded by bending the connecting portions of both side plates inward.
[0004]
[Patent Document 1]
Japanese Examined Patent Publication No. 7-5133
[Problems to be solved by the invention]
However, when a load is applied from above the container in a state in which the conventional folded container is assembled and accommodated, the connecting portion of the side plate is bent inward or outward of the container. Therefore, when the stored item is a liquid or gel-like product filled in a film bag or the like, for example, soy sauce or oil, those that solidify at room temperature to low temperature, for example, margarine, butter, chocolate, etc. When the container is stored and transported, there is a risk that the stored items may be deformed due to the bending of the side plate, and it becomes difficult to take out from the container if it is solidified in the stored state. . Further, depending on the state of the connecting portion, an article having a soft outer surface may be damaged. For this reason, the articles as described above are stored in a plastic or corrugated cardboard integrated storage container, but there is a big problem in the processing of the storage container after the article is taken out.
[0006]
Therefore, the present invention provides a folding container that can protect articles stored by making the inner surface of the container a smooth surface, can be easily folded and assembled, and can improve the strength in the assembled state. It is intended to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a folding container according to the present invention has, as a first configuration, a pair of rectangular top and bottom plates facing each other, and a pair of upper and lower plates facing each other vertically. A folding container having a hexahedron structure in which the upper side of the side plate and the upper side of the side plate are connected to the upper frame in a state of being rotatable inside the container. The hinge plate provided on the bottom plate is pivotably connected to the outer surface of the intermediate portion in the vertical direction of the side plate, and the hinge pin provided on the lower end portion of the hinge plate extends in the container inside / outside direction provided on the edge of the bottom plate. It is characterized in that it is connected to an oval hinge hole having a long axis so as to be able to rotate inside the container and move in and out of the container.
[0008]
Further, in the folding container having the first configuration, a connecting portion between the upper end portion of the hinge plate and the outer surface in the vertical direction intermediate portion of the side plate includes a support shaft provided on the outer surface of the side plate, and an upper end portion of the hinge plate. The hinge groove is formed by engaging the upper end of the hinge plate along the outer surface of the side plate from the outside of the container when the side plate is in the container assembly state. It is bent in a U shape so as to surround the support shaft toward the direction, and the opening of the hinge groove is formed so as to face the bottom plate direction. In the assembled state, the upper frame direction is formed on the outer surface of the hinge groove facing the outer surface of the side plate. Is provided with a flat engaging portion, and on the outer surface of the side plate, there is provided a flat engaging portion facing the bottom plate that engages with the flat portion of the protrusion in an assembled state. .
[0009]
In addition, the second configuration of the folding container of the present invention includes an upper frame and a bottom plate facing each other, a pair of side plates and a pair of doors closing each of the two sides facing the upper and lower sides of the upper frame and the bottom plate, respectively. A folding container having a hexahedral structure in which the upper part of the side plate and the upper part of the tilt plate are connected to the upper frame in a state of being rotatable inside the container, and an upper frame and a bottom plate on which the side plate is provided. A hinge comprising a pair of upper and lower hinge plates that are connected to the upper frame and the bottom plate so as to be rotatable inside the container, and are connected so as to be bent inward at the connecting portion in the middle portion in the vertical direction. The components are provided along the outer surface of the side plate, and the upper end of the lower hinge plate extends upward beyond the connecting portion.
[0010]
Furthermore, in the first and second configurations, the folding container of the present invention is such that the hinge plate is formed narrower than the side plate, and a plurality of the hinge plates are provided in the width direction of the side plate, The upper portion of the side plate and the upper frame are provided with engaging portions that engage with each other to receive a force in the direction of separation between the side plate and the upper frame when the container is assembled. In the container assembly state, the frame is provided with an engaging portion that engages with each other and receives a force in the compression direction of the side plate and the upper frame. The container assembly state is provided in the lower portion of the side plate and the bottom plate. In this case, each of the engaging portions is configured to be engaged with each other to receive a force in a direction away from the side plate and the bottom plate.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5 show a first example of a folding container according to the present invention, FIG. 1 is a sectional front view showing a folded container in an assembled state, and FIG. 2 is a sectional front view showing a folded container in a folded state, 3 is a partially sectional side view showing the folded container in an assembled state, FIG. 4 is a sectional front view of the main part showing an enlarged connection state of the upper frame, the bottom plate, the side plate and the hinge plate, and FIG. It is a cross-sectional front view of the principal part which expands and shows the relationship with a baseplate. 6 and 7 show a modified example of the folding container showing the first embodiment, FIG. 6 is a sectional front view of the folding container showing a state in the middle of folding, and FIG. 7 is a sectional view of the folding container showing the folded state. It is a front view.
[0012]
First, in FIG. 1 to FIG. 5, the folding container includes an upper frame 11 and a bottom plate 12 that are rectangular in a plan view, and a pair of tilt plates 13 that are rotatably provided on opposite short sides of the upper frame 11. A folding container having a hexahedron structure having a pair of side plates 14 rotatably connected to the long side of the upper frame 11, and the tilt plate 13 is connected to a plurality of positions on the short side of the upper frame 11. In the portion 13a, the upper portion of the side plate 14 is connected to the long side of the upper frame 11 in three connecting portions 14a in the present embodiment, and is respectively connected in a rotatable state inside the container, and the long side of the bottom plate 12 and Hinge plates 15 for connecting the bottom plate 12 and the side plates 14 are provided at three locations between the outer surfaces of the side plates 14 in the vertical direction.
[0013]
The hinge plate 15 is engaged with a hinge pin 16 provided at the lower end portion in a hinge hole 17 provided at an edge portion of the bottom plate 12 so as to be rotatable inside the container. The hinge pin 16 is provided in a direction parallel to the long side of the bottom plate 12, and the hinge hole 17 has an oval shape having a long axis in the container inner / outer direction. Therefore, the lower end portion of the hinge plate 15 is in a state in which it can move in and out of the container along the oval direction of the hinge hole 17.
[0014]
The upper part of the hinge plate 15 is engaged with a horizontal support shaft 18 provided on the outer surface of the side plate 14 in a pivotable manner with a hinge groove 19 provided at the upper end of the hinge plate 15. The hinge groove 19 surrounds the support shaft 18 with the upper end portion of the hinge plate 15 along the outer surface of the side plate facing inward from the outside of the container when the side plate 14 is in the container assembly state. It is bent in a U shape, and the opening of the hinge groove 19 has a shape facing the bottom plate direction.
[0015]
In the assembled state shown in FIG. 1, the folding container is configured such that after the lower part of the two side plates 13 is turned inward, the lower part of the side plate 14 is turned inward so that the upper part of the hinge plate 15 is directed inward of the container. The side plate 14 and the hinge plate 15 are bent to enter the inside of the container so that the side plate 14 and the hinge plate 15 are bent. As shown in FIG. 2, the tilt plate 13, the side plate 14, and the hinge plate 15 are placed between the upper frame 11 and the bottom plate 12. It will be in the folded state. In this folded state, the upper frame 11 is lifted upward so that the side plates 14 and the hinge plates 15 are stretched so that the side plates 14 are raised, and then the two side plates 14 are rotated to stand between the side plates 14. 1, the tilt plate 13 and the side plate 14 are substantially upright, and the upper and lower sides of the upper frame 11 and the bottom plate 12 are closed by the tilt plate 13 and the side plate 14 respectively. Can be assembled into a hexahedral box shape. In this assembled state, the side edges of the tilt plate 13 are in contact with the inner surfaces of the side plates 14, and the side plate 14 is pressed from the inside to be held so that the side plate 14 does not rotate inward.
[0016]
In this folding container, the inner surface of the container in the assembled state is surrounded by the four surfaces of the tilt plate 13 and the side plate 14 made of a single plate, and there is no connecting portion of the side plate like the conventional folding container on the inner surface side of the container. Therefore, the inner surface of the container can be a smooth surface. By making the container inner surface smooth as described above, the article stored in the container is not deformed or damaged, the stored article can be protected, and the article is solidified during transportation. Even if it does, it becomes possible to take out easily. Furthermore, since the load from the upper part at the time of multi-stage stacking can be received by both the tilt plate 13 and the side plate 14, the load strength can be greatly improved as compared with the conventional case where only the tilt plate is received.
[0017]
Further, when the container is folded or assembled, the hinge hole 17 of the bottom plate 12 with which the hinge pin 16 of the hinge plate 15 engages has an oval shape substantially parallel to the bottom plate. As shown, the hinge plate 15 can be used even when the lower ends of the side plates 14 collide with each other when the container is folded or assembled due to the relationship between the short side dimension and the height dimension of the folding container. The side plate 14 rotates by moving the lower end portion of the container toward the inside and outside of the container and the lower end portions of the side plates are displaced from each other, so that the impact at the time of collision can be reduced and the container can be folded and assembled smoothly. Even if the upper frame 11 and the bottom plate 12 are misaligned in the folded state, the misalignment can be absorbed by the ellipse-shaped hinge hole 17, so that the force applied to the hinge plate 15 can be released. In addition, as shown in FIG. 7, the positions of the hinge pins 16 with respect to the hinge holes 17 are shifted on both sides in the folded state, so that the both side plates 14 can be folded together.
[0018]
Furthermore, as shown in FIG. 4, the connection between the upper end of the hinge plate 15 and the outer surface of the side plate 14, between the upper end of the side plate 14 and the upper frame 11, and between the lower end of the side plate 14 and the bottom plate 12. Each is provided with an engaging portion for reinforcing the container during assembly. First, the connecting portion between the hinge plate 15 and the side plate 14 is provided with an engagement protrusion 21 having a flat upper frame 11 direction on the outer surface of the hinge groove 19 facing the outer surface of the side plate 14 in the assembled state. 14 is provided with a planar engaging portion 22 facing the bottom plate 12 that engages with the planar portion of the engaging projection 21 in the assembled state. By providing the engagement protrusion 21 and the planar engagement portion 22 as described above, the two can be engaged at the time of assembly to reinforce the side plate 14 side of the hinge groove 19. As a result, when the upper frame 11 is lifted with the article stored, the force in the direction of opening the hinge groove 19 in the support shaft 18 and the hinge groove 19, that is, the direction of extending the side plate 14 side of the hinge groove 19 upward. Even if this acts, the side plate side of the hinge groove 19 is not stretched by the engagement between the engagement protrusion 21 and the planar engagement portion 22, and the engagement state of both can be reliably maintained.
[0019]
Further, between the side plate 14 and the upper frame 11, an engaging claw 23 is provided at the upper end portion of the side plate 14 so as to face the inside of the container at the time of assembly and the lower side is flat, and the entire length in the width direction is provided. Is provided with an upwardly extending engagement protrusion 24 that engages with the downward flat portion of the engagement claw 23 during assembly. When the side plate 14 is rotated to a predetermined position during assembly, the engagement claw 23 engages with the engagement protrusion 24, and forces the side plate 14 and the upper frame 11 away from each other, that is, in the state where the article is stored. The force generated when the frame 11 is lifted can be reliably received by the engagement between the engagement claws 23 and the engagement protrusions 24, and the burden on the connecting portion 14a can be reduced.
[0020]
Further, between the side plate 14 and the upper frame 11, a protruding portion 25 in the side plate width direction that protrudes from the outer surface of the upper side plate is provided, and a rib 26 positioned outside the side plate 14 is provided on the long side portion of the upper frame 11. When the container is assembled, the upper surface of the protrusion 25 is engaged with the lower surface of the rib 26. As a result, when the assembled container is stacked, a load in the compression direction applied from the upper frame 11 toward the side plate 14 can be received by substantially the entire side plate 14 by the engagement between the ribs 26 and the protruding portions 25. The load applied to the connecting portion 14a of the side plate 14 can be reduced.
[0021]
Between the side plate 14 and the bottom plate 12, as shown in an enlarged view in FIG. 5, a protruding edge 27 in the side plate width direction is provided on the outer surface of the lower end portion of the side plate 14, and the long side portion of the bottom plate 12 is provided at the time of assembly. A folded piece 28 located above the protruding edge 27 is provided. Therefore, when the container is assembled, the protruding edge 27 and the folded piece 28 are engaged to bring the side plate 14 and the bottom plate 12 into an integrated state. Therefore, when the upper frame 11 is lifted with the article stored, the bottom plate 12 Since the load in the direction in which the side plate 14 and the bottom plate 12 are separated from each other can be received by the side plate 14 by the engagement of both, it is possible to prevent a large tensile load from being applied to the hinge plate 15.
[0022]
8 and 9 show a second embodiment of the folding container of the present invention. FIG. 8 is a sectional front view of the folding container showing an assembled state, and FIG. 9 is a sectional front view of the folding container showing a state in the middle of folding. FIG. In the following description, the same components as those in the folding container shown in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0023]
The folding container shown in the present embodiment is rotatable outside the side plate 14, on the long side of the upper frame 11, and on the inside of the container on the long side of the bottom plate 12. The lower hinge plate 32 connected to the hinge plate 34 is formed by bending a pair of upper and lower hinge plates 31 and 32 formed so as to be bent inside the container by a connecting portion 33 provided at an intermediate portion in the vertical direction. In addition to being provided along the outer surface, the extension portion 35 is provided by extending the upper end of the lower hinge plate 32 beyond the connecting portion 33.
[0024]
By providing the extending portion 35 at the upper end of the lower hinge plate 32 as described above, the upper end of the extending portion 35 contacts the outer surface of the side plate 14 when the container is folded as shown in FIG. As the side plate 14 is bent and folded before the folding angle of the hinge part 34, the lower end of the side plate 14 is separated from the upper surface of the bottom plate 12.
[0025]
Therefore, even in the case of a container having a dimensional relationship such that the lower ends of the side plates 14 collide when folded, the lower ends of the side plates 14 collide with each other by changing the lengths of the respective extending portions 35. Moreover, since the lower end part of the side plate 14 at the time of rotation does not contact the upper surface of the bottom plate 12, the container can be folded and assembled more smoothly. Further, the upper hinge plate 31 and the lower hinge plate 32 are in a state along the upper surface of the bottom plate 12 in the state where the container is folded, similarly to the hinge plate 15 of the first embodiment, so that the folding volume increases. There is hardly anything.
[0026]
Furthermore, also in this embodiment, by adopting the same structure as the first embodiment between the upper end portion of the side plate 14 and the upper frame 11 and between the lower end portion of the side plate 14 and the bottom plate 12. The strength of the container in the assembled state can be improved. In both embodiments, the shape and the number of the hinge plates 15 and the hinge parts 34 are arbitrary, and these can be selected according to the width and height of the side plate 14. The upper frame 11 can be provided with a lid that can be opened and closed.
[0027]
【The invention's effect】
As described above, according to the folding container of the present invention, the inner surface of the container can be made smooth, the assembly and folding can be performed smoothly, and the strength of the container in the assembled state is also improved. be able to. Therefore, it is most suitable as a storage container for storing, transporting, storing and transporting margarine, butter, chocolate, etc., which solidify at room temperature or low temperature, such as liquid or gel soy sauce or oil filled in film bags, etc. .
[Brief description of the drawings]
FIG. 1 is a sectional front view in an assembled state showing a first embodiment of a folding container of the present invention.
FIG. 2 is a cross-sectional front view showing the folded container in the folded state.
FIG. 3 is a partially sectional side view showing the folded container in the assembled state.
FIG. 4 is an enlarged cross-sectional front view of a main part showing a connection state of an upper frame, a bottom plate, a side plate, and a hinge plate.
FIG. 5 is a cross-sectional front view of a main part showing an enlarged relationship between a lower end portion of a side plate and a bottom plate.
FIG. 6 is a cross-sectional front view showing a state in the middle of folding showing a modified example of the folding container.
FIG. 7 is a cross-sectional front view of the folding container showing the folded state.
FIG. 8 is a cross-sectional front view in an assembled state showing a second embodiment of the folding container of the present invention.
FIG. 9 is a cross-sectional front view showing a folding container that is also being folded.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Upper frame, 12 ... Bottom plate, 13 ... Side plate, 13a ... Connection part, 14 ... Side plate, 14a ... Connection part, 15 ... Hinge plate, 16 ... Hinge pin, 17 ... Hinge hole, 18 ... Support shaft, 19 ... Hinge Groove, 21 ... engaging protrusion, 22 ... planar engaging portion, 23 ... engaging claw, 24 ... engaging protrusion, 25 ... protruding portion, 26 ... rib, 27 ... projecting edge, 28 ... folded piece, 31 ... upper hinge plate, 32 ... lower hinge plate, 33 ... connecting part, 34 ... hinge part, 35 ... extension part

Claims

And a pair of side plates and a pair of side plates that respectively close the two sides facing the top and bottom sides of the top and bottom plates. In a folding container with a hexahedral structure in which the upper part is connected to the upper frame so as to be able to rotate inside the container, the upper end of the hinge plate provided outside the side plate is rotated to the outer surface of the intermediate part in the vertical direction. The hinge pin provided at the lower end of the hinge plate can be connected to the inside of the container in an oblong hinge hole having a long axis in the container inside / outside direction provided on the edge of the bottom plate and inside / outside of the container A folding container characterized by being connected in a movable state.

The connecting portion between the upper end portion of the hinge plate and the outer surface of the intermediate portion in the vertical direction is formed by engaging a support shaft provided on the outer surface of the side plate and a hinge groove provided on the upper end portion of the hinge plate. The hinge groove is formed so as to surround the support shaft with the upper end of the hinge plate along the outer surface of the side plate facing inward from the outside of the container in the container assembly state in which the side plate is erected. Bending in a letter shape, forming the opening of the hinge groove to face the bottom plate direction, and providing an engaging protrusion whose upper frame direction is flat on the outer surface of the hinge groove facing the outer surface of the side plate in the assembled state, 2. The folding container according to claim 1, wherein a planar engaging portion facing a bottom plate direction that engages with a planar portion of the protrusion in an assembled state is provided on the outer surface of the side plate.

And a pair of side plates and a pair of side plates that respectively close the two sides facing the top and bottom sides of the top and bottom plates. A folding container having a hexahedral structure in which the upper part is connected to the upper frame so as to be rotatable inside the container, and between the upper frame and the bottom plate on which the side plate is provided, the inner side of the container with respect to the upper frame and the bottom plate And a hinge part composed of a pair of upper and lower hinge plates connected in a rotatable state and connected to bend inward at the connecting portion of the intermediate portion in the vertical direction, along the outer surface of the side plate, A folding container, wherein an upper end of a lower hinge plate extends upward beyond the connecting portion.

The folding container according to claim 1 or 3, wherein the hinge plate is formed narrower than the side plate, and a plurality of the hinge plates are provided in the width direction of the side plate.

2. The upper portion of the side plate and the upper frame are each provided with an engaging portion that engages with each other and receives a force in a separating direction between the side plate and the upper frame when the container is assembled. Or the folding container of 3.

2. The upper portion of the side plate and the upper frame are each provided with an engaging portion that engages with each other and receives a force in the compression direction of the side plate and the upper frame when the container is assembled. Or the folding container of 3.

4. An engaging portion is provided on the lower portion of the side plate and the bottom plate, respectively, for engaging with each other in the container assembly state and receiving a force in the direction of separating the side plate and the bottom plate. Folding container as described.