JP2004268953A

JP2004268953A - Assembly box

Info

Publication number: JP2004268953A
Application number: JP2003060401A
Authority: JP
Inventors: Goro Matsumoto; 五郎松本; Yoshinori Miyashita; 恵伯宮下; Hiroshi Kato; 浩加藤
Original assignee: ENSHU SHIKOGYO KK
Current assignee: ENSHU SHIKOGYO KK
Priority date: 2003-03-06
Filing date: 2003-03-06
Publication date: 2004-09-30

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly box which can be closed with a lid without damaging contents or a lid part, requires a reduced amount of material to be used such as corrugated fiberboard, and be easily bundled in a flat-developed condition. <P>SOLUTION: The assembly box 10 is constituted of long side surface parts 11 and 12, short side surface parts 13 and 14, bottom surface pieces 15 and 16, engagement bottom surface pieces 17 and 18, long lid pieces 21 and 22 and short lid pieces 23 and 24. The long lid piece 22, the short lid piece 24, the long lid piece 21 and the short lid piece 23 are successively bent, and a circular edge part 22b of the long lid piece 22 located below the short lid piece 23 which is bent last is lifted and located above a corner edge part 23c of the short lid piece 23. In the developed condition, a lower edge part and an upper edge part of a corrugated fiberboard 10a are located on the same line. In addition, in the assembled condition, the bottom surface pieces 15 and 16, the engagement bottom surface pieces 17 and 18, the long lid pieces 21 and 22, and the short lid pieces 23 and 24 do not overlap each other, respectively. A finger grip hole part 16c is formed in the bottom surface piece 16. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、野菜、果物、菓子等を収容するための組立箱に関する。
【０００２】
【従来の技術】
従来から、野菜、果物、菓子等の種々のものを収容するために組立箱が用いられている。この組立箱は、工場で専用の機械を用いて大量に生産されており、まず、大きな箱用材料、例えば、段ボールを準備し、これを打ち抜き加工等により組立箱の展開図の形状に切断するとともに、折線部に破線状の切断線、溝状の切欠き部または線状の圧痕をつけている。そして、この展開形状の段ボールの糊代部を所定部分に接着し、折線部に沿って各部分を所定方向に折り曲げることによって、段ボールを箱状に組み立てている（例えば、特許文献１）。
【０００３】
【特許文献１】
特開２００２−１２８０６９号公報
【０００４】
【発明が解決しようとする課題】
このような組立箱のなかには、上部開口を蓋する蓋片を粘着テープや金具で止めるのではなく、４つの蓋片を順次折り曲げて上部開口を閉塞し、最後に折り曲げた蓋片の端部と最初に折り曲げた蓋片の端部とを係合させることにより蓋部を形成するものがある。しかしながら、このような組立箱では、蓋片の端部どうしを係合させる際、係合させ難かったり、無理に係合させると蓋片が折れ曲がったりするという問題が生じる。また、係合させる蓋片の端部を箱体の内部側に押し込んで他方の蓋片に係合させる組立箱の場合、組立箱に収容される収容物が、例えば、パセリのような傷つき易い野菜であれば、蓋片の角部に当たって傷んでしまうという問題もある。
【０００５】
また、前述した特許文献１に記載の組立箱は、展開状態では、各縁部が一直線上になくばらばらの位置になっているため、段ボールの中に使用できないむだな部分が多量に生じるという問題がある。さらに、このような組立箱は、段ボールの印刷、切断、糊代部の接着、および平面状になった組立箱を複数個束ねる積層工程までを機械で自動的に行い、そののちの必要に応じて手作業によって組み立てが行われる。このため、組立箱を束ねる積層工程の際、組立箱の各縁部が不連続に並んでいると束ねにくくなるという問題も生じている。また、従来の組立箱は、底面部や蓋部に重なった部分が多く生じるため、段ボール等の材料の使用量が多くなり製造コストが高くなるという問題もある。
【０００６】
【発明の概要】
本発明は、上記問題に対処するためになされたもので、その目的は、収容物や蓋部を傷つけることなく蓋することができ、段ボール等の材料の使用量が少なくてすみ、かつ平面状態では束ね易い組立箱を提供することである。
【０００７】
上記の目的を達成するため、本発明に係る組立箱の構成上の特徴は、四角筒状の側面を構成する４つの側面部と、４つの側面部のうちの相対向する一対の側面部の下端部側に折線部を介してそれぞれ設けられた一対の底面片と、４つの側面部のうちの他の一対の側面部の下端部側に折線部を介して設けられ、一対の底面片に組み付けられることにより一対の底面片とで底面を構成する一対の係合底面片と、４つの側面部の上端部側に折線部を介して設けられた４つの蓋片とを一体的に形成してなり、４つの側面部で構成される四角筒状の上面開口を塞ぐように所定回りで順次前記蓋片を折り曲げていき、最後に折り曲げた蓋片の下方に位置する最初に折り曲げた蓋片の端部側部分を最後に折り曲げた蓋片の端部側部分の上方に位置させることにより箱状体に組み立てられる組立箱であって、最初に折り曲げられる蓋片の端部側部分の縁部と、その端部側部分に対応する最後に折り曲げられる蓋片の端部側部分の縁部との少なくとも一方の縁部を角部を取り除いた丸い形状にして、端部側部分どうしを係合させ易くしたことにある。
【０００８】
前記のように構成した本発明の組立箱では、４つの蓋片を順次折り曲げて上部開口を閉塞していき、最後に折り曲げた蓋片の下方に位置する最初に折り曲げた蓋片の端部側部分を最後に折り曲げた蓋片の端部側部分の上方に位置させることにより上部開口を蓋するようにしている。また、最初に折り曲げられる蓋片の端部側部分の縁部および最後に折り曲げられる蓋片のその端部側部分に対応する端部側部分の縁部の少なくとも一方の縁部から角部を取り除いてその部分を丸い形状にしている。
【０００９】
したがって、蓋片の端部側部分どうしの係合がスムーズになり、蓋片が折れ曲がったりすることがなくなる。この場合、最初に折り曲げた蓋片と最後に折り曲げた蓋片との双方の端部側部分から角部を取り除いて、その部分の縁部形状を丸くしてもよい。また、最初に折り曲げられる蓋片の端部側部分と最後に折り曲げられる蓋片のその端部側部分に対応する端部側部分だけでなく、すべての蓋片における端部側部分の縁部を丸い形状にすることもできるし、任意の蓋片における端部側部分の縁部を丸い形状にすることもでる。
【００１０】
また、本発明に係る組立箱の他の構成上の特徴は、最後に折り曲げた蓋片の端部側部分と最初に折り曲げた蓋片の端部側部分との係合が、最後に折り曲げた蓋片の下方に位置する最初に折り曲げた蓋片の端部側部分を持ち上げて最後に折り曲げた蓋片の端部側部分の上方に位置させることにより行われることにある。これによると、組立箱の内部に傷つき易い収容物が収容されていても蓋をする際に、収容物に傷が付くことがない。
【００１１】
また、本発明に係る組立箱のさらに他の構成上の特徴は、展開状態の組立箱において、一対の底面片および一対の係合底面片との下端縁部が同一直線上に位置し、４つの蓋片の上端縁部が同一線上に位置するようにしたことにある。この場合、下端縁部は側面部の底面側の延長方向の縁部を示し、上端縁部は側面部の蓋部側の延長方向の縁部を示している。これによると、各縁部が直線上になるため、組立箱を構成する材料への印刷、切断および糊代部の接着が終了したのちの平面状になった組立箱を積層して個束ねる処理がスムーズに行えるようになる。また、箱用材料に使用されない無駄な部分が少なくなる。
【００１２】
また、本発明に係る組立箱のさらに他の構成上の特徴は、組立状態の組立箱において、一対の底面片間、一対の係合底面片間および相対向するそれぞれ一対の蓋片間に重なり部分が生じないようにしたことにある。これによると、組立箱を形成するための材料が最小量ですみコストの削減が可能になる。また、この場合、組立箱に収容される収容物が大きなもので、かつ通気性をよくすることが好ましいものである場合には、各蓋片間に隙間が開くようにしてもよい。さらに、収容物を露呈させてディスプレイ効果を持たせる場合には、各蓋片間にさらに大きな隙間を設けることができる。これによると、材料の大幅な節約が可能になる。
【００１３】
また、本発明に係る組立箱のさらに他の構成上の特徴は、一対の底面片における対向部分に掛け渡して形成される差込孔を所定間隔で一対設けるとともに、一対の係合底面片の先端に差込部を設け、一対の底面片と一対の係合底面片との係合を、箱状体の底面位置に折り曲げられた一対の底面片を一対の係合底面片の差込部で箱状体の内部側に押し込むようにして、差込部を差込孔に係合させることにより行うようにするとともに、一対の底面片における対向部分の少なくとも一方の縁部に、箱状体の内部側に押し込まれた一対の底面片を箱状体の底面位置に戻すための指当て用穴部を設けたことにある。
【００１４】
このように構成した本発明の組立箱では、一対の底面片における対向部分に両底面片に掛かる差込孔が一対設けられ、一対の係合底面片の先端に、それぞれ一対の差込孔に差し込むことにより一対の底面片と係合可能な差込部が設けられている。そして、底面位置に折り曲げられた一対の底面片を一対の係合底面片で、箱状体の内部側に押し込むことにより差込部を差込孔に差し込んで係合させることができるようにしている。すなわち、一対の係合底面片で一対の底面片を箱状体の内部側に押し込むと、一対の底面片は一対の係合底面片の差込部に押されて箱状体の内部側に入り込むようにして傾斜する。
【００１５】
その際、差込部は一対の底面片の表面に沿って移動しながら傾き所定の傾きになったときに、その先端部が差込孔に係合する。この状態では、一対の底面片および一対の係合底面片はそれぞれ箱状体の内部側に向って傾斜した状態であるため、指当て穴部に指を入れて、一対の底面片の一方を所定に底面位置まで引っ張ると、他の底面片および一対の係合底面片も底面位置に戻るようになる。このように指当て穴部が設けられているため、簡単な操作で、一対の底面片と一対の係合底面片とを組立箱の底面位置に移動させて各片の係合を確実にすることができる。なお、この指当て穴部は双方の底面片に設けてもよい。
【００１６】
また、本発明に係る組立箱のさらに他の構成上の特徴は、組立箱を段ボールで構成したことにある。これによると、安価で丈夫な組立箱を得ることができる。
【００１７】
【発明の実施の形態】
以下、本発明の一実施形態を図面を用いて説明する。図１および図２は、本発明に係るパセリを収容するための組立箱１０を示している。この段ボール１０は、側面が相対向する２つの長側面部１１，１２と他の相対向する２つの短側面部１３，１４とで構成され、底面が相対向する２つの底面片１５，１６と他の相対向する２つの係合底面片１７，１８とで構成されている。そして、蓋部が相対向する２つの長蓋片２１，２２と他の相対向する２つの短蓋片２３，２４とで構成されている。
【００１８】
図３は、組立箱１０を展開した状態を示しており、組立箱１０は、１枚で構成される段ボール１０ａを所定箇所で折り曲げて組付けることにより、図１および図２に示した箱状になる。すなわち、図３に示すように、側面を構成する各部分は、長側面部１１、短側面部１３、長側面部１２および短側面部１４の順に横方向に連なって形成され、長側面部１１の開放側端部には糊代部１１ａが形成されている。そして、短側面部１３，１４の左右の中央部におけるやや上部側に組立箱１０を運ぶ際に手を入れるための運搬用の穴部１３ａ，１４ａがそれぞれ設けられている。また、長側面部１１，１２と短側面部１３，１４とは高さが同じに設定され、長側面部１１，１２の横方向の長さは短側面部１３，１４の横方向の長さの２倍に設定されている。
【００１９】
底面片１５，１６は、それぞれ長側面部１１，１２の底面側縁部に折線部１９ａ，１９ｂを介して設けられている。そして、底面片１５の図示の下端部に間隔を保って底面片１５の下端縁部から底面片１５の上部側に向って延びる差込孔１５ａ，１５ｂが設けられ、底面片１６の図示の下端部に差込孔１５ａ，１５ｂと同じ間隔を保って底面片１６の下端縁部から底面片１６の上部側に向って延びる差込孔１６ａ，１６ｂが設けられている。この段ボール１０ａを組み立てて図２に示した組立箱１０にした状態では、差込孔１５ａ，１６ａおよび差込孔１５ｂ，１６ｂはそれぞれ直線状に連なる。また、底面片１６の下端縁部（図３の状態での下端）における中央部には、半円状の切欠き部からなる指当て穴部１６ｃが設けられている。
【００２０】
係合底面片１７，１８は、それぞれ短側面部１３，１４の底面側縁部に折線部１９ｃ，１９ｄを介して設けられている。係合底面片１７，１８は、ともに先端側（図３の下端側）が先細りになった略三角形に形成され、その先端に先端部が扁平になった差込部１７ａ，１８ａがそれぞれ形成されている。差込部１７ａは、差込孔１５ｂ，１６ｂに差し込まれて底面片１５，１６と係合できる形状および大きさに形成され、差込部１８ａは、差込孔１５ａ，１６ａに差し込まれて底面片１５，１６と係合できる形状および大きさに形成されている。
【００２１】
また、差込孔１５ａ，１５ｂ，１６ａ，１６ｂの各奥端の縁部は、それぞれ差し込まれる係合底面片１７，１８の対応する縁部と平行するように設定されている。このため、差込部１７ａと差込孔１５ｂ，１６ｂとの係合および差込部１８ａと差込孔１５ａ，１６ａとの係合が設定された正確な位置で行われるようになり、組み付けられた底面片１５，１６と係合底面片１７，１８との間に歪み等が生じにくくなる。また、係合底面片１７，１８の図３における高さ方向の幅は底面片１５，１６の高さ方向の幅と同じ長さに設定されて、係合底面片１７，１８と底面片１５，１６との下端縁部は同一直線上に位置するように設定されている。
【００２２】
長蓋片２１，２２は、それぞれ長側面部１１，１２の上部側縁部に折線部１９ｅ，１９ｆを介して設けられている。長蓋片２１の一方の端部は切り欠かれて傾斜縁部２１ａに形成され、長蓋片２２の一方の端部（組み立てた状態では傾斜縁部２１ａと反対方向の端部となる。）は、下部側が傾斜部と水平部とからなる鈍角の角部を有する角縁部２２ａに形成され上部側が角部を取り除いて丸く形成された円形縁部２２ｂに形成されている。
【００２３】
短蓋片２３，２４は、それぞれ短側面部１３，１４の上部側縁部に折線部１９ｇ，１９ｈを介して設けられている。短蓋片２３の一方の端部は切り欠かれて傾斜縁部２３ａに形成され、短蓋片２３の他方の端部は、下部側が角部を取り除いて丸く形成された円形縁部２３ｂに形成され、上部側が傾斜部と上端縁部との間で鈍角の角部を形成する角縁部２３ｃに形成されている。短蓋片２４の一方の端部は切り欠かれて傾斜縁部２４ａに形成されている。
【００２４】
また、長蓋片２１，２２および短蓋片２３，２４の図３における高さ方向の幅は底面片１５，１６および係合底面片１７，１８の高さ方向の幅の略半分の長さに設定されており、長蓋片２１，２２および短蓋片２３，２４の上端縁部は同一直線上に位置するように設定されている。また、糊代部１１ａと長側面部１１との境界部、長側面部１１と短側面部１３との境界部、短側面部１３と長側面部１２との境界部および長側面部１２と短側面部１４との境界部には、それぞれ折線部１９ｉ，１９ｊ，１９ｋ，１９ｌが形成されている。このように構成された段ボール１０ａを、所定の順序で折り曲げながら組み立てることにより組立箱１０が形成される。
【００２５】
つぎに、組立箱１０の製造方法について説明する。この製造においては、まず、組立箱１０を製造するための段ボールとして、段ボール１０ａの外郭部分を囲うことのできる長方形の段ボールを複数枚準備する。つぎに、この段ボールを、印刷装置、切断装置、折り畳み装置および積層装置を備えた製造ラインの入口に設置して、製造ラインの各装置を駆動させる。これによって、段ボールは、まず、印刷装置によって、組立箱１０の表面部を構成する各面に所定の模様や文字が印刷される。つぎに、切断装置によって、切断されて段ボール１０ａの形状になる。
【００２６】
この切断は、ロール状に形成された回転体の周面に段ボール１０ａの輪郭形状の刃部を取り付け、この回転体を回転させながら印刷済みの段ボールを印刷装置から順次送り、回転体の刃部を段ボールに押し付ることにより行う。また、段ボール１０ａの折線部１９ａ〜１９ｌに対応する回転体の周面には、押圧用の突部が形成されており、その突部で段ボール１０ａを押圧することにより圧痕からなる折線部１９ａ〜１９ｌが形成される。
【００２７】
ついで、段ボール１０ａは、折り畳み装置に送られ、図４に示すように、折り畳まれる。すなわち、長側面部１１が折線部１９ｊに沿って折り曲げられて、長側面部１１等は短側面部１３等の上面側に重なり、短側面部１４が折線部１９ｌに沿って折り曲げられて、短側面部１４等は長側面部１２等の上面側に重なる。この際、糊代部１１ａと、糊代部１１ａに対面する短側面部１４の端部とは接着剤によって接着される。そして、図４のようになった段ボール１０ａは、積層装置に送られて、順次積層される。
【００２８】
積層装置では、送られてくる図４の状態の段ボール１０ａを順次台部上面に落下させながら、台部の近傍に設けられた固定壁に対して移動部を進退移動させることにより各段ボール１０ａを固定壁に押し付けて積層することが行われる。段ボール１０ａの積層量が所定値になると各段ボール１０ａは紐によって束ねられる。この段ボール１０ａの積層の際、段ボール１０ａの上端縁部および下端縁部は、ともに直線状になって、殆ど凸凹がないため正確に揃えられて良好な積層状態になる。ここまでの各処理が製造ラインの各装置によって行われる。
【００２９】
段ボール１０ａの組み立ては、必要に応じて手作業によって行われ、まず、折線部１９ｉ，１９ｋに沿って、長側面部１１と糊代部１１ａとの間および長側面部１２と短側面部１３との間を折り曲げて図５の状態にする。この状態では、長側面部１１，１２と短側面部１３，１４とは、上下方向を逆にした四角枠状になっており、その状態の上端部から底面片１５，１６と係合底面片１７，１８とが上方に向って起立し、下端部から長蓋片２１，２２と短蓋片２３，２４とが下方に向かって延びている。
【００３０】
つぎに、折線部１９ａ，１９ｂに沿って、底面片１５，１６を折り曲げて図６の状態にする。ついで、折線部１９ｃ，１９ｄに沿って、係合底面片１７，１８を折り曲げる。そして、さらに係合底面片１７，１８を長側面部１１，１２と短側面部１３，１４とで構成される四角枠状の内部側に押し込んで、差込部１７ａ，１８ａの先端部をそれぞれ差込孔１５ｂ，１６ｂおよび差込孔１５ａ，１６ａの位置まで移動させる。
【００３１】
この場合、底面片１５，１６のそれぞれ対向側部分は、差込部１７ａ，１８ａの先端部とともに、傾斜して前記四角枠状の内部側に入り込んでいく。そして、差込部１７ａ，１８ａの先端部がそれぞれ差込孔１５ｂ，１６ｂおよび差込孔１５ａ，１６ａに達したところで、差込部１７ａ，１８ａを差込孔１５ｂ，１６ｂおよび差込孔１５ａ，１６ａ内に差し込む。この状態では、底面片１５，１６および係合底面片１７，１８のそれぞれ先端縁部側部分は四角枠状の内部側に向って傾斜した状態になっている。
【００３２】
この状態で、指当て部１６ｃから箱内部に指を入れて底面片１６の縁部側を上方（図５および図６の状態での上方）に引っ張ることにより、図７の状態の組立箱１０になる。この場合、底面片１６を引っ張ると、差込孔１６ａ，１６ｂを介して底面片１６に係合している係合底面片１７，１８も底面片１６とともに移動し、さらに、差込孔１５ａ，１５ｂを介して係合底面片１７，１８に係合している底面片１５も底面片１６とともに移動する。
【００３３】
つぎに、図７の状態に組み立てられた組立箱１０の上下を反転させたのちに、折線部１９ｆに沿って長蓋片２２を折り曲げて、図８の状態にする。ついで、折線部１９ｈに沿って短蓋片２４を折り曲げて、図９の状態にし、さらに、折線部１９ｅに沿って長蓋片２１を折り曲げて、図１０の状態にする。そして、折線部１９ｇに沿って短蓋片２３を折り曲げて、図１１の状態にしたのちに、長蓋片２２の円形縁部２２ｂを持ち上げて短蓋片２３の角縁部２３ｃの上面に位置させることにより、図１に示した組立箱１０が完成する。
【００３４】
この場合、長蓋片２２の角縁部２２ａの上面に短蓋片２３の円形縁部２３ｂが位置し、短蓋片２３の角縁部２３ｃの上面に長蓋片２２の円形縁部２２ｂが位置することにより、長蓋片２２と短蓋片２３とは係合する。また、長蓋片２２と短蓋片２３とを係合させる際、長蓋片２２の円形縁部２２ｂが丸い円形状になっているため、長蓋片２２や短蓋片２３の端部を折り曲げたりすることなくスムーズに係合させることができる。なお、各長蓋片２１，２２および短蓋片２３，２４を組付ける前に、組立箱１０内には、パセリが収容される。また、必要に応じて、組立箱１０の上面開口に透明のシールを貼り付けることもできる。
【００３５】
以上のように、本実施形態に係る組立箱１０では、長蓋片２２の端部側の縁部を、鈍角の角部を有する角縁部２２ａと丸い円形状の円形縁部２２ｂとで構成し、短蓋片２３の端部側の縁部を、角縁部２２ａに対応する円形縁部２３ｂと円形縁部２２ｂに対応する角縁部２３ｃとで構成している。したがって、長蓋片２２と短蓋片２３との係合がスムーズかつ確実に行われる。この結果、長蓋片２２や短蓋片２３の端部側部分が折れ曲がったり、破損したりすることがなくなる。また、蓋部を構成する各片の中で最初に折り曲げられる長蓋片２２の円形縁部２２ｂを上方に持ち上げることにより、長蓋片２２と短蓋片２３の係合が行われるため、内部の収容物を傷つけることがなくなる。
【００３６】
さらに、図３および図４に示した段ボール１０ａの下端縁部および上端縁部がそれぞれ同一線上に位置するようになっているため、所定数の段ボール１０ａを積層して個束ねる処理がスムーズに行える。また、組立箱１０において、底面片１５，１６の各縁部は僅かに接する状態になり、係合底面片１７，１８はともに短く設定されてその間には大きな空間が生じるようになってともに重なる部分が設けられていない。また、長蓋片２１，２２間および短蓋片２３，２４間には大きな空間部が形成されている。したがって、組立箱１０を形成するための段ボールが最小量ですみコストの削減が可能になる。
【００３７】
また、組立箱１０では、底面片１６の縁部に指当て穴部１６ｃを設けて、この指当て部１６ｃに指を入れて、底面片１６を移動させることにより、他の底面片１５および係合底面片１７，１８も適正な底面位置に移動するようになる。この結果、簡単な操作で、それぞれ係合した底面片１５，１６と係合底面片１７，１８とを組立箱１０の底面位置に移動させ、底面を構成する各片を確実に係合させることができる。
【００３８】
さらに、前述した組立箱１０は、段ボール１０ａの各片を組み付けるだけで形成でき、金具や粘着テープ等は使用されていない。したがって、廃棄する際に可燃物と不燃物に区分けする必要がなくなるとともに、再生処理してリサイクルする場合にも適している。
【００３９】
また、本発明に係る組立箱１０は、前述した実施形態に限定するものでなく、技術的範囲内で適宜変更実施が可能である。例えば、前述した実施形態では、指当て部１６ｃを底面片１６に設けたが、これは底面片１５に設けてもよく、また双方に設けてもよい。さらに、長蓋片２２の角縁部２２ａ、円形縁部２２ｂおよび短蓋片２３の円形縁部２３ｂ、角縁部２３ｃの形状は、前述した形状に限らず他の形状にすることもできる。
【００４０】
また、角縁部や円形縁部は、長蓋２２および短蓋片２３の一方の端部側部分だけでなく、他方にも設けることができるし、他の長蓋片２１や短蓋片２４の任意の端部側部分にも設けることができる。さらに、前述した実施形態では、組立箱１０が段ボール１０ａを組付けることによって形成されているが、この組立箱１０を構成する材料としては、段ボールに限らず、他の紙やプラスチック製のシート等を目的に応じて適宜使用することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態による組立箱を上面側から見た状態を示した斜視図である。
【図２】図１に示した組立箱を底面側から見た状態を示した斜視図である。
【図３】図１に示した組立箱の展開図である。
【図４】図１に示した組立箱を折り畳んだ状態を示す側面図である。
【図５】図４に示した組立箱を広げて立体的にした状態を示した斜視図である。
【図６】図５に示した組立箱の底面片を折り曲げた状態を示した斜視図である。
【図７】図６に示した段ボールの底面片に係合底面片を係合させた状態を示した斜視図である。
【図８】図７に示した組立箱の一方の長蓋片を折り曲げた状態を示した斜視図である。
【図９】図８に示した段ボールの一方の短蓋片を折り曲げた状態を示した斜視図である。
【図１０】図９に示した段ボールの他方の長蓋片を折り曲げた状態を示した斜視図である。
【図１１】図１０に示した段ボールの他方の短蓋片を折り曲げた状態を示した斜視図である。
【符号の説明】
１０…組立箱、１０ａ…段ボール、１１，１２…長側面部、１３，１４…短側面部、１５，１６…底面片、１５ａ，１５ｂ，１６ａ，１６ｂ…差込孔、１６ｃ…指当て穴部、１７，１８…係合底面片、１７ａ，１８ａ…差込部、２１，２２…長蓋片、２２ａ，２３ｃ…角縁部、２２ｂ，２３ｂ…円形縁部、２３，２４…短蓋片、１９ａ〜１９ｌ…折線部。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an assembly box for storing vegetables, fruits, confectionery and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, assembly boxes have been used to store various items such as vegetables, fruits, and confectionery. This assembly box is mass-produced at a factory using a dedicated machine. First, a large box material, for example, cardboard is prepared and cut into a shape of a development view of the assembly box by punching or the like. At the same time, a dashed cutting line, a groove-shaped notch or a linear indentation is provided in the fold line. Then, a glue margin of the expanded cardboard is adhered to a predetermined portion, and each portion is bent in a predetermined direction along a fold line portion, thereby assembling the cardboard into a box shape (for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-128069
[Problems to be solved by the invention]
In such an assembling box, rather than fixing the lid piece that covers the upper opening with adhesive tape or metal fittings, the four lid pieces are sequentially folded to close the upper opening, and the end of the finally folded lid piece is closed. Some lids are formed by engaging an end of a lid piece bent first. However, in such an assembling box, when engaging the ends of the lid pieces, there is a problem that it is difficult to engage or that the lid pieces are bent when they are forcibly engaged. Further, in the case of an assembly box in which the end of the lid piece to be engaged is pushed into the inner side of the box body and is engaged with the other lid piece, the stored item in the assembly box is easily damaged, for example, parsley. Vegetables also have the problem that they hit the corners of the lid and become damaged.
[0005]
Further, in the assembly box described in Patent Document 1 described above, in the unfolded state, since each edge is not in a straight line but at a discrete position, there is a problem that a large amount of useless portions are not used in the cardboard. There is. In addition, such an assembly box automatically performs the steps of printing and cutting of cardboard, laminating a glue margin, and laminating a plurality of flat assembly boxes by a machine. Assembly is performed manually. For this reason, in the laminating step of bundling the assembly boxes, there is also a problem that if the edges of the assembly boxes are arranged discontinuously, it becomes difficult to bundle them. In addition, the conventional assembly box has a problem that many parts overlap with the bottom portion and the lid portion, so that the amount of materials such as cardboard is increased and the manufacturing cost is increased.
[0006]
Summary of the Invention
SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and has as its object to cover a container or a cover without damaging the cover, to use a small amount of material such as corrugated cardboard, and to achieve a flat state. Then, it is to provide an assembly box which can be easily bundled.
[0007]
In order to achieve the above object, the structural features of the assembling box according to the present invention include four side portions constituting a square tubular side surface and a pair of opposed side portions of the four side portions. A pair of bottom pieces respectively provided on the lower end portion via a fold line portion, and a pair of bottom face pieces provided on a lower end side of another pair of side surface portions of the four side surface portions via a fold line portion are provided. A pair of engagement bottom pieces forming a bottom surface by a pair of bottom pieces by being assembled are integrally formed with four lid pieces provided at the upper end side of the four side faces via a fold line portion. The lid piece is sequentially bent in a predetermined direction so as to close the opening of the upper surface of the quadrangular cylindrical shape composed of the four side portions, and the first folded lid piece located below the finally bent lid piece The upper end of the lid is located above the end of the lid An assembling box assembled into a box-like body, wherein an edge of an end portion of a lid piece to be folded first and an edge of an end portion of a lid piece to be folded last corresponding to the end portion. At least one edge with the portion has a round shape from which a corner is removed, so that the end side portions are easily engaged with each other.
[0008]
In the assembly box of the present invention configured as described above, the four lid pieces are sequentially folded to close the upper opening, and the end side of the first folded lid piece located below the last folded lid piece. The upper opening is covered by positioning the portion above the end side portion of the lid piece that was finally bent. Also, corners are removed from at least one edge of the edge of the end portion of the lid piece to be folded first and the edge of the end portion of the lid piece to be folded last corresponding to the end portion of the lid piece. The part is rounded.
[0009]
Therefore, the engagement between the end portions of the lid piece becomes smooth, and the lid piece does not bend. In this case, corner portions may be removed from both end side portions of the first bent lid piece and the last bent lid piece, and the edge shape of that part may be rounded. In addition, not only the end portion of the lid piece that is folded first and the end portion of the lid piece that is folded last, but also the edge of the end portion of all the lid pieces. A round shape may be used, and an edge of an end portion of any lid piece may be rounded.
[0010]
Another structural feature of the assembly box according to the present invention is that the engagement between the end portion of the lid piece bent last and the end portion of the lid piece folded first is bent last. This is accomplished by lifting the end portion of the first folded lid piece located below the lid piece and positioning it above the end portion of the last folded lid piece. According to this, even when a container that is easily damaged is stored inside the assembly box, the container does not get damaged when the lid is closed.
[0011]
Still another structural feature of the assembly box according to the present invention is that, in the assembly box in the unfolded state, the lower edges of the pair of bottom pieces and the pair of engagement bottom pieces are located on the same straight line, That is, the upper edge portions of the two lid pieces are located on the same line. In this case, the lower edge indicates the edge of the side surface in the extension direction on the bottom surface side, and the upper edge indicates the edge of the side surface in the extension direction on the lid side. According to this, since each edge is straight, a process of laminating and bundling planar assembly boxes after printing, cutting, and bonding of the glue margin portion to the material constituting the assembly box are completed. Can be performed smoothly. Further, wasteful portions not used for the box material are reduced.
[0012]
Still another structural feature of the assembling box according to the present invention is that in the assembling box in the assembled state, the assembling box overlaps between a pair of bottom pieces, between a pair of engaging bottom pieces, and between a pair of opposing lid pieces. That is, no parts are generated. According to this, the amount of material for forming the assembly box can be minimized, and the cost can be reduced. Further, in this case, if the items to be stored in the assembly box are large and it is preferable to improve the air permeability, a gap may be opened between the lid pieces. Further, when the contents are exposed to give a display effect, a larger gap can be provided between the lid pieces. This allows for significant savings in material.
[0013]
Further, still another structural feature of the assembly box according to the present invention is that a pair of insertion holes formed so as to extend over opposed portions of the pair of bottom pieces are provided at a predetermined interval, and a pair of engagement bottom pieces are formed. An insertion portion is provided at the tip, and the pair of bottom pieces bent into the bottom position of the box-shaped body is engaged with the pair of bottom pieces and the pair of engagement bottom pieces. And by inserting the insertion portion into the insertion hole so that the insertion portion is engaged with the insertion hole, and at least one edge of the facing portion of the pair of bottom pieces is provided with a box-shaped body. A hole for finger contact is provided for returning a pair of bottom pieces pushed into the inside of the box to the bottom position of the box-shaped body.
[0014]
In the assembly box of the present invention configured as described above, a pair of insertion holes that hang over both bottom pieces are provided at opposing portions of the pair of bottom pieces, and a pair of insertion holes are respectively provided at the tips of the pair of engagement bottom pieces. An insertion portion that can be engaged with a pair of bottom pieces by being inserted is provided. Then, by inserting a pair of bottom pieces bent to the bottom position with a pair of engagement bottom pieces into the inner side of the box-shaped body, the insertion portion can be inserted into the insertion hole and engaged. I have. That is, when the pair of engagement bottom pieces is pushed into the inside of the box-shaped body by a pair of bottom pieces, the pair of bottom pieces are pushed by the insertion portions of the pair of engagement bottom pieces and are pushed into the inside of the box-shaped body. Tilt to enter.
[0015]
At this time, when the insertion portion is inclined while moving along the surfaces of the pair of bottom pieces, the tip portion engages with the insertion hole. In this state, since the pair of bottom pieces and the pair of engagement bottom pieces are each inclined toward the inner side of the box-shaped body, a finger is inserted into the finger contact hole, and one of the pair of bottom pieces is attached. When pulled to a predetermined bottom position, the other bottom piece and the pair of engagement bottom pieces also return to the bottom position. Since the finger contact holes are provided as described above, the pair of bottom pieces and the pair of engagement bottom pieces are moved to the bottom position of the assembly box by a simple operation to ensure the engagement of each piece. be able to. The finger contact holes may be provided on both bottom pieces.
[0016]
Still another structural feature of the assembly box according to the present invention is that the assembly box is made of cardboard. According to this, an inexpensive and robust assembly box can be obtained.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show an assembly box 10 for accommodating parsley according to the present invention. The corrugated cardboard 10 is composed of two long side portions 11 and 12 having opposite sides and two other short side portions 13 and 14 having opposite sides, and two bottom pieces 15 and 16 having opposite bottom surfaces. It is constituted by two opposing engagement bottom pieces 17 and 18. The lid portion is composed of two opposing long lid pieces 21 and 22 and the other two opposing short lid pieces 23 and 24.
[0018]
FIG. 3 shows a state in which the assembling box 10 is expanded. The assembling box 10 is formed by bending a single piece of corrugated cardboard 10a at a predetermined location and assembling the cardboard 10a, as shown in FIGS. become. That is, as shown in FIG. 3, each part constituting the side surface is formed so as to extend in the lateral direction in the order of the long side surface portion 11, the short side surface portion 13, the long side surface portion 12, and the short side surface portion 14. Is formed at the open end thereof. In addition, transport holes 13a and 14a are provided on the left and right central portions of the short side portions 13 and 14, respectively, for carrying hands when transporting the assembly box 10, respectively. The heights of the long side portions 11 and 12 and the short side portions 13 and 14 are set to be the same, and the lateral length of the long side portions 11 and 12 is the lateral length of the short side portions 13 and 14. Is set to twice.
[0019]
The bottom pieces 15 and 16 are provided on the bottom side edges of the long side faces 11 and 12 via folding lines 19a and 19b, respectively. Insert holes 15a, 15b extending from the lower edge of the bottom piece 15 toward the upper side of the bottom piece 15 are provided at the lower end of the bottom piece 15 with a space therebetween. Insertion holes 16a, 16b are provided in the portion extending from the lower edge of the bottom piece 16 toward the upper side of the bottom piece 16 at the same intervals as the insertion holes 15a, 15b. When the corrugated cardboard 10a is assembled into the assembly box 10 shown in FIG. 2, the insertion holes 15a, 16a and the insertion holes 15b, 16b are respectively linearly connected. Further, a finger contact hole 16c formed of a semicircular cutout is provided at the center of the bottom edge of the bottom piece 16 (the lower end in the state of FIG. 3).
[0020]
The engaging bottom pieces 17 and 18 are provided on the bottom side edges of the short side faces 13 and 14 via folding lines 19c and 19d, respectively. Each of the engagement bottom pieces 17 and 18 is formed in a substantially triangular shape having a tapered distal end (lower end in FIG. 3), and insertion portions 17a and 18a each having a flat distal end formed at the distal end. ing. The insertion portion 17a is formed into a shape and a size that can be inserted into the insertion holes 15b and 16b and engage with the bottom pieces 15 and 16, and the insertion portion 18a is inserted into the insertion holes 15a and 16a and It is formed in a shape and a size that can be engaged with the pieces 15 and 16.
[0021]
In addition, the edges of the deep ends of the insertion holes 15a, 15b, 16a, 16b are set to be parallel to the corresponding edges of the engagement bottom pieces 17, 18, respectively. For this reason, the engagement between the insertion portion 17a and the insertion holes 15b and 16b and the engagement between the insertion portion 18a and the insertion holes 15a and 16a are performed at the set accurate positions, and the assembly is performed. Distortion or the like is less likely to occur between the bottom pieces 15 and 16 and the engagement bottom pieces 17 and 18. The width of the engaging bottom pieces 17 and 18 in the height direction in FIG. 3 is set to the same length as the width of the bottom pieces 15 and 16 in the height direction. , 16 are set so as to be located on the same straight line.
[0022]
The long lid pieces 21 and 22 are provided on the upper side edges of the long side surfaces 11 and 12 via folding lines 19e and 19f, respectively. One end of the long lid piece 21 is cut out to form an inclined edge 21a, and one end of the long lid piece 22 (the end in the assembled state is an end in the opposite direction to the inclined edge 21a). The lower side is formed on a corner edge 22a having an obtuse angled corner composed of an inclined portion and a horizontal portion, and the upper side is formed on a circular edge portion 22b formed by removing the corner portion and forming a round shape.
[0023]
The short lid pieces 23 and 24 are provided on the upper side edges of the short side surfaces 13 and 14 via folding lines 19g and 19h, respectively. One end of the short lid piece 23 is cut out to form an inclined edge 23a, and the other end of the short lid piece 23 is formed in a circular edge 23b whose lower side is rounded off by removing a corner. The upper side is formed at a corner 23c which forms an obtuse corner between the inclined portion and the upper edge. One end of the short lid piece 24 is cut out to form an inclined edge 24a.
[0024]
The width of the long lid pieces 21 and 22 and the short lid pieces 23 and 24 in the height direction in FIG. 3 is substantially half the width of the bottom pieces 15 and 16 and the engagement bottom pieces 17 and 18 in the height direction. , And the upper end portions of the long lid pieces 21 and 22 and the short lid pieces 23 and 24 are set so as to be located on the same straight line. Also, the boundary between the glue margin portion 11a and the long side portion 11, the boundary between the long side portion 11 and the short side portion 13, the boundary between the short side portion 13 and the long side portion 12, and the short side between the long side portion 12 and the short side portion 12. Folded lines 19i, 19j, 19k, and 19l are formed at the boundaries with the side surfaces 14, respectively. The assembling box 10 is formed by assembling the cardboard 10a thus configured while bending it in a predetermined order.
[0025]
Next, a method of manufacturing the assembly box 10 will be described. In this manufacturing, first, a plurality of rectangular cardboards that can surround the outer part of the cardboard 10a are prepared as cardboards for manufacturing the assembly box 10. Next, the cardboard is placed at the entrance of a production line including a printing device, a cutting device, a folding device, and a laminating device, and each device of the production line is driven. As a result, first, a predetermined pattern or character is printed on the corrugated cardboard by the printing device on each surface constituting the surface of the assembly box 10. Next, it is cut by the cutting device into the shape of the cardboard 10a.
[0026]
This cutting is performed by attaching a blade having a contour shape of a corrugated cardboard 10a to the peripheral surface of a rotating body formed in a roll shape, sequentially feeding printed cardboard from a printing device while rotating the rotating body, and cutting the blade of the rotating body. Is pressed against cardboard. Pressing projections are formed on the peripheral surface of the rotating body corresponding to the folding lines 19a to 19l of the cardboard 10a, and the projections press the cardboard 10a to form the folding lines 19a to 19c. 191 are formed.
[0027]
Next, the corrugated cardboard 10a is sent to the folding device, and is folded as shown in FIG. That is, the long side portion 11 is bent along the fold line portion 19j, the long side portion 11 and the like overlap with the upper surface side of the short side portion 13 and the like, and the short side portion 14 is bent along the fold line portion 191 to be short. The side surface portion 14 overlaps with the upper surface side of the long side surface portion 12 and the like. At this time, the adhesive margin portion 11a and the end of the short side surface portion 14 facing the adhesive margin portion 11a are adhered by an adhesive. Then, the corrugated cardboard 10a as shown in FIG. 4 is sent to the laminating device and is sequentially laminated.
[0028]
In the laminating apparatus, each of the corrugated cardboards 10a in the state of FIG. 4 is sequentially dropped on the upper surface of the pedestal, and the corrugated cardboard 10a is moved forward and backward with respect to a fixed wall provided near the pedestal. Lamination is performed by pressing against a fixed wall. When the stacking amount of the cardboards 10a reaches a predetermined value, the cardboards 10a are bundled with a cord. At the time of stacking the corrugated cardboard 10a, the upper edge and the lower edge of the corrugated cardboard 10a are both straight, and have almost no unevenness, so that they are accurately aligned and in a good laminated state. Each process up to this point is performed by each device of the production line.
[0029]
The corrugated cardboard 10a is assembled by hand if necessary. First, along the fold lines 19i and 19k, the space between the long side surface 11 and the glue margin 11a and the long side surface 12 and the short side surface 13 are formed. Is bent to form the state shown in FIG. In this state, the long side portions 11 and 12 and the short side portions 13 and 14 are in the shape of a square frame with the vertical direction reversed, and the bottom pieces 15 and 16 and the engagement bottom pieces are formed from the upper end in this state. 17 and 18 stand upward, and long lid pieces 21 and 22 and short lid pieces 23 and 24 extend downward from the lower end.
[0030]
Next, the bottom pieces 15, 16 are bent along the folding lines 19a, 19b to obtain the state shown in FIG. Next, the engagement bottom pieces 17, 18 are bent along the folding lines 19c, 19d. Then, the engagement bottom pieces 17 and 18 are further pushed into the inside of the rectangular frame formed by the long side parts 11 and 12 and the short side parts 13 and 14, and the tip ends of the insertion parts 17a and 18a respectively. It is moved to the positions of the insertion holes 15b, 16b and the insertion holes 15a, 16a.
[0031]
In this case, the opposing side portions of the bottom pieces 15 and 16 together with the tip portions of the insertion portions 17a and 18a are inclined and enter the inside of the square frame. Then, when the distal ends of the insertion portions 17a and 18a reach the insertion holes 15b and 16b and the insertion holes 15a and 16a, respectively, the insertion portions 17a and 18a are inserted into the insertion holes 15b and 16b and the insertion holes 15a and 15a. 16a. In this state, the front edge portions of the bottom pieces 15, 16 and the engagement bottom pieces 17, 18 are inclined toward the inside of the square frame.
[0032]
In this state, a finger is inserted into the box from the finger contact portion 16c, and the edge of the bottom piece 16 is pulled upward (upward in the state of FIGS. 5 and 6), whereby the assembly box 10 in the state of FIG. become. In this case, when the bottom piece 16 is pulled, the engagement bottom pieces 17, 18 engaged with the bottom piece 16 via the insertion holes 16a, 16b also move together with the bottom piece 16, and further, the insertion holes 15a, The bottom piece 15 engaged with the engagement bottom pieces 17 and 18 via 15b also moves together with the bottom piece 16.
[0033]
Next, after turning the assembly box 10 assembled in the state of FIG. 7 upside down, the long lid piece 22 is bent along the fold line portion 19f to obtain the state of FIG. Next, the short lid piece 24 is bent along the fold line portion 19h to obtain the state shown in FIG. 9, and further, the long lid piece 21 is bent along the fold line portion 19e to obtain the state shown in FIG. Then, after the short lid piece 23 is bent along the fold line portion 19g to obtain the state shown in FIG. 11, the circular edge portion 22b of the long lid piece 22 is lifted to be positioned on the upper surface of the corner edge 23c of the short lid piece 23. By doing so, the assembly box 10 shown in FIG. 1 is completed.
[0034]
In this case, the circular edge 23b of the short lid 23 is located on the upper surface of the corner 22a of the long lid 22, and the circular edge 22b of the long lid 22 is located on the upper surface of the corner 23c of the short lid 23. By being located, the long lid piece 22 and the short lid piece 23 are engaged. When the long lid piece 22 and the short lid piece 23 are engaged with each other, the circular edge portion 22b of the long lid piece 22 has a round circular shape. The engagement can be smoothly performed without bending. Before assembling the long lid pieces 21 and 22 and the short lid pieces 23 and 24, parsley is stored in the assembly box 10. If necessary, a transparent seal can be attached to the upper opening of the assembly box 10.
[0035]
As described above, in the assembly box 10 according to the present embodiment, the edge on the end side of the long lid piece 22 is configured by the corner edge 22a having an obtuse corner and the round circular edge 22b. The edge on the end side of the short lid piece 23 is constituted by a circular edge 23b corresponding to the angular edge 22a and a square edge 23c corresponding to the circular edge 22b. Accordingly, the engagement between the long lid piece 22 and the short lid piece 23 is performed smoothly and reliably. As a result, the end portions of the long lid piece 22 and the short lid piece 23 do not bend or break. Further, by lifting up the circular edge 22b of the long lid piece 22 which is bent first among the pieces constituting the lid part, the long lid piece 22 and the short lid piece 23 are engaged with each other. No damage to the contents.
[0036]
Further, since the lower edge and the upper edge of the corrugated cardboard 10a shown in FIGS. 3 and 4 are located on the same line, the process of laminating and bundling a predetermined number of corrugated boards 10a can be performed smoothly. . Also, in the assembly box 10, the edges of the bottom pieces 15, 16 are slightly in contact with each other, and the engagement bottom pieces 17, 18 are both set to be short, so that a large space is created therebetween and they overlap with each other. No part is provided. A large space is formed between the long lid pieces 21 and 22 and between the short lid pieces 23 and 24. Therefore, the corrugated cardboard for forming the assembly box 10 can be reduced to a minimum amount, and the cost can be reduced.
[0037]
Further, in the assembly box 10, a finger contact hole 16c is provided at an edge of the bottom piece 16, and a finger is inserted into the finger contact section 16c to move the bottom piece 16 so as to move the other bottom piece 15 and the engaging member. The mating bottom pieces 17 and 18 also move to appropriate bottom positions. As a result, the engaged bottom pieces 15, 16 and the engagement bottom pieces 17, 18 are moved to the bottom position of the assembly box 10 by a simple operation, and the pieces constituting the bottom face are securely engaged. Can be.
[0038]
Further, the above-described assembly box 10 can be formed only by assembling each piece of the cardboard 10a, and no metal fittings or adhesive tapes are used. Therefore, it is not necessary to classify the waste into combustibles and non-flammables at the time of disposal, and it is also suitable for recycling by recycling.
[0039]
Further, the assembly box 10 according to the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented within the technical scope. For example, in the above-described embodiment, the finger contact portion 16c is provided on the bottom piece 16, but it may be provided on the bottom piece 15 or on both. Further, the shape of the corner edge 22a and the circular edge 22b of the long lid piece 22 and the shape of the circular edge 23b and the corner edge 23c of the short lid piece 23 are not limited to the above-described shapes, and may be other shapes.
[0040]
Further, the corner edge and the circular edge can be provided not only on one end side portion of the long lid 22 and the short lid piece 23 but also on the other. May be provided at any of the end side portions. Further, in the above-described embodiment, the assembly box 10 is formed by assembling the cardboard 10a. However, the material forming the assembly box 10 is not limited to cardboard, but may be other paper or plastic sheets. Can be appropriately used according to the purpose.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which an assembly box according to an embodiment of the present invention is viewed from an upper surface side.
FIG. 2 is a perspective view showing a state where the assembly box shown in FIG. 1 is viewed from a bottom surface side.
FIG. 3 is an exploded view of the assembly box shown in FIG. 1;
FIG. 4 is a side view showing a state where the assembly box shown in FIG. 1 is folded.
FIG. 5 is a perspective view showing a state in which the assembly box shown in FIG.
6 is a perspective view showing a state in which a bottom piece of the assembly box shown in FIG. 5 is bent.
7 is a perspective view showing a state in which an engagement bottom piece is engaged with a bottom piece of the cardboard shown in FIG. 6;
8 is a perspective view showing a state where one long lid piece of the assembly box shown in FIG. 7 is bent.
9 is a perspective view showing a state where one short lid piece of the cardboard shown in FIG. 8 is bent.
FIG. 10 is a perspective view showing a state where the other long cover piece of the cardboard shown in FIG. 9 is bent.
11 is a perspective view showing a state in which the other short lid piece of the cardboard shown in FIG. 10 is bent.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Assembly box, 10a ... Corrugated cardboard, 11, 12 ... Long side part, 13, 14 ... Short side part, 15, 16 ... Bottom piece, 15a, 15b, 16a, 16b ... Insert hole, 16c ... Finger contact hole part , 17, 18 ... engagement bottom piece, 17a, 18a ... insertion part, 21, 22 ... long lid piece, 22a, 23c ... square edge, 22b, 23b ... circular edge, 23, 24 ... short lid piece, 19a to 19l: broken line portion.

Claims

Four side parts constituting a square cylindrical side surface,
A pair of bottom pieces provided on the lower end side of a pair of opposing side faces of the four side faces via folding lines,
A pair of bottom surfaces is provided on the lower end side of the other pair of side surface portions of the four side surface portions via a fold line portion, and assembled with the pair of bottom surface pieces to form a bottom surface with the pair of bottom surface pieces. Engagement bottom piece,
The four side pieces are integrally formed with four lid pieces provided on the upper end side of the four side parts via a fold line portion, so as to cover a square cylindrical upper surface opening constituted by the four side parts. The cover piece is sequentially bent in a predetermined direction, and the end side portion of the first bent cover piece located below the finally bent cover piece is located above the end side portion of the last bent cover piece. An assembly box assembled into a box-shaped body by positioning
At least one edge of the edge of the end side portion of the first bent lid piece and the edge of the end side portion of the last bent lid piece corresponding to the end side portion are corners. An assembly box characterized by having a round shape from which the end portions are easily engaged with each other.

The engagement between the end-side portion of the last-folded lid piece and the end-side portion of the first-folded lid piece is the first-folded lid piece located below the last-folded lid piece. The assembly box according to claim 1, wherein the assembly is performed by lifting an end portion and positioning the lid portion above the end portion of the last bent lid piece.

In the assembling box in the unfolded state, lower end edges of the pair of bottom pieces and the pair of engagement bottom pieces are located on the same straight line, and upper end edges of the four lid pieces are located on the same line. The assembly box according to claim 1 or 2, wherein:

4. The assembly box according to claim 1, wherein the assembly box is in an assembled state, and no overlapping portion is formed between the pair of bottom pieces, between the pair of engagement bottom pieces, and between the pair of opposing lid pieces. An assembly box according to any one of the above.

A pair of insertion holes formed at predetermined intervals are provided to extend over opposed portions of the pair of bottom pieces, and an insertion portion is provided at the tip of the pair of engagement bottom pieces, and the pair of bottom pieces and the pair of bottom pieces are provided. The engagement with the engagement bottom piece is performed by pushing the pair of bottom pieces bent to the bottom position of the box-like body into the inside of the box-like body at the insertion portion of the pair of engagement bottom pieces. Then, the insertion is performed by engaging the insertion portion with the insertion hole, and at least one edge of the facing portion of the pair of bottom pieces is pushed into the inside of the box-shaped body. The assembly box according to any one of claims 1 to 4, further comprising a finger contact hole for returning the pair of bottom pieces to the bottom position of the box-shaped body.

The assembly box according to any one of claims 1 to 5, wherein the assembly box is made of cardboard.