【０００１】
【発明の属する技術分野】
この発明は、段ボール紙や厚紙等の板紙を用いた紙箱に関するものである。
【０００２】
【従来の技術および発明が解決しようとする課題】
板紙を用いた紙箱は、荷造り用、収納ケース用、陳列ケース用等に幅広く使用されている。荷造り用や収納ケース用等の比較的大寸法の紙箱には段ボール紙が多く用いられ、陳列ケース用等の小寸法の紙箱には厚紙が多く用いられる。
【０００３】
これらの紙箱の形式は様々なものがあるが、側壁を形成する胴枠部に、底面を形成する底面フラップや天面を形成する天面フラップを一体に設けたワンピース形式のものが最も多い。ワンピース形式の紙箱は、組立の際の接着部が少ない利点を有するが、底面フラップ同士の差し込みや重ね合わせで形成される底面に凹凸が生じる難点がある。また、底抜けに対する強度を十分に確保するためには、重ね合わせ式の底面フラップは勿論、差し込み式のものでも補強テープの貼り付けを必要とする難点がある。さらに、ワンピース形式の紙箱はブランク形状が複雑になるので、ブランク採りの効率が悪くなる問題もある。底面フラップが差し込み式のものは、ブランク形状がさらに複雑なものとなる。
【０００４】
一方、従来の複数ピース形式の紙箱は、ピース同士の結合のために多くの接着部を必要とし、その接着面積も広くなるので、組み立てに手間がかかる問題がある。
【０００５】
そこで、この発明の課題は、底面に凹凸がなく、底抜けに対する強度を十分に有し、かつ、単純形状のブランクで簡単に組み立て可能な紙箱を提供することである。
【０００６】
【課題を解決するための手段】
上記の課題を解決するために、この発明の紙箱は、帯状の板紙ブランクから４面の側壁部を折り曲げで形成して矩形枠とした胴枠部材と、それぞれ帯状の板紙ブランクから、底板部の両側に一対の立壁部を折り曲げで形成した２つの底板部材とから成り、前記各底板部材の底板部を上下に重ねて前記胴枠部材の底面開口へ嵌め込み、それぞれの前記一対の立壁部を、前記胴枠部材の直交する別々の対の側壁部内面に重ね合わせる構成を採用したものである。
【０００７】
すなわち、紙箱を、いずれも単純形状の帯状の板紙ブランクを折り曲げて形成される胴枠部材と２つの底板部材との３ピースで構成し、各底板部材を底板部の両側に一対の立壁部を形成したものとして、各底板部材の底板部を上下に重ねて胴枠部材の底面開口へ嵌め込み、それぞれの一対の立壁部を、胴枠部材の直交する別々の対の側壁部内面に重ね合わせることにより、底面に凹凸をなくし、かつ、互いに重ね合わされる胴枠部材の側壁部と各底板部材の立壁部との摩擦抵抗で、底抜けに対する十分な強度が得られるようにした。
【０００８】
前記各底板部材の一対の立壁部の先端に、それぞれが重ね合わされる前記胴枠部材の側壁部の上端から外側に折り返される折り返し部を設けることにより、各折り返し部の側壁部上端への引っ掛かり効果で、底抜けに対する強度をさらに高めることができる。
【０００９】
前記各底板部材の一対の立壁部の先端に、それぞれが重ね合わされる前記胴枠部材の側壁部の上端で内折りされる天面フラップを設けることにより、紙箱をそのまま荷造り用に用いることができる。
【００１０】
前記胴枠部材の対向する一対の側壁部に、上下に延びる折り目線を、前記胴枠部材の枠中心に関して点対称に設けることにより、胴枠部材をコンパクトに折り畳んで、製品出荷や販売店での展示に供することができる。
【００１１】
前記紙箱の対向する一対の側壁間に差し渡される板紙製の仕切り板部材を設け、この仕切り板部材を、上端で２つ折りにして重ね合わされる各仕切り板部の両側端に、前記一対の対向する側壁の内面に沿わされる折り曲げ片を形成したものとし、これらの各折り曲げ片の先端を、それぞれが沿わされる側壁の終端コーナ部に突き当てることにより、接着部を設けることなく、紙箱に仕切り板を形成することができる。この仕切り板は、各折り曲げ片の側壁終端コーナ部への突き当てにより、高い剛性を有するので、天面を横向きとした収納ケース等とする場合に、棚板の役目をさせることもできる。
【００１２】
前記少なくとも１つの側壁部と、その内面に重ね合わされる前記立壁部とに貫通孔を設け、この貫通孔に通されて、前記重ね合わされた側壁部と立壁部とを内外から挟持する把手部材を取り付けることにより、この把手部材を紙箱持ち上げ用の把手や、収納ケースの引出し用把手とすることができる。また、この把手部材の取り付けは、重ね合わされた側壁部と立壁部間の摩擦抵抗を高め、底抜けに対する強度を増大させる効果もある。
【００１３】
【発明の実施の形態】
以下、図１乃至図１１に基づき、この発明の実施形態を説明する。図１乃至図７は、第１の実施形態を示す。この紙箱は段ボール紙製の収納ケースであり、図１に示すように、胴枠部材１と２つの底板部材２、３と仕切り板部材４とから成り、１つの側壁に引き出し用の把手部材５ａ、５ｂが取り付けられるようになっている。なお、胴枠部材１の表面は淡青色、底板部材２、３と仕切り板部材４の表面は濃紺色とされており、ツートーンカラーの収納ケースとして組み立てられる。
【００１４】
図２（ａ）に示すように、胴枠部材１は帯状のブランクとされ、４本の折り目線６で折り曲げられて継ぎ代７が接着され、長短一対ずつの側壁部１ａ、１ｂで矩形枠に形成されるようになっている。長辺側の一方の側壁部１ａには、把手部材５ａ、５ｂ取り付け用の丸孔８が設けられている。
【００１５】
また、短辺側の各側壁部１ｂには、中央で上下に延びる折り目線９が設けられており、矩形枠に形成された胴枠部材１は、図２（ｂ）に示すように、各折り目線９でコンパクトに折り畳むことができる。なお、各折り目線９は、胴枠部材１の枠中心に関して点対称であれば、各側壁部１ｂの中央からずらしてもよい。
【００１６】
図３（ａ）、（ｂ）に示すように、各底板部材２、３も帯状のブランクとされ、それぞれ底板部２ａ、３ａの両側に一対の立壁部２ｂ、３ｂが設けられ、各立壁部２ｂ、３ｂの先端に折り返し部２ｃ、３ｃが設けられている。各立壁部２ｂ、３ｂはそれぞれ折り目線１０、１１で立てられ、各折り返し部２ｃ、３ｃは折り目線１２、１３で折り返される。各折り返し部２ｃ、３ｃの裏面側には、カバーテープで覆われた粘着テープ１４、１５が貼付され、立壁部３ｂの一方には、把手部材５ａ、５ｂ取り付け用の丸孔１６が設けられている。
【００１７】
図１に示したように、先に底板部材２の底板部２ａが胴枠部材１の底面開口に嵌め込まれ、その一対の立壁部２ｂが短辺側の各側壁部１ｂの内面に重ね合わされて、各折り返し部２ｃが側壁部１ｂの上端から外側に折り返されたのち、底板部材３の底板部３ａが底板部２ａの上に重ねて嵌め込まれ、その一対の立壁部３ｂが長辺側の各側壁部１ａの内面に重ね合わされて、各折り返し部３ｃが側壁部１ａの上端から外側に折り返される。各折り返し部２ｃ、３ｃは、それぞれ粘着テープ１４、１５で各側壁部１ｂ、１ａの外面に接着されるようになっている。また、立壁部３ｂの丸孔１６は、側壁部１ａの丸孔８と重なるようになっている。
【００１８】
図４に示すように、仕切り板部材４は、一対の仕切り板部４ａが中央の折り目線１７の両側に対称に設けられ、各仕切り板部４ａの両側端に、折り曲げ片４ｂが折り目線１８を介して設けられている。片側の２つの折り曲げ片４ｂには、後述する把手部材５ｂのフランジ２４が嵌まり込む一対の半丸孔１９が設けられている。
【００１９】
図１に示したように、一対の仕切り板部４ａは折り目線１７で２つ折りに重ねられ、各折り曲げ片４ｂが、立壁部３ｂの内面に沿わされるように折り目線１８で左右に広げて折り曲げられる。左右に広げて折り曲げられた折り曲げ片４ｂの辺長は、胴枠部材１の長辺側の側壁部１ａの辺長と等しく形成されており、各折り曲げ片４ｂの先端が側壁部１ａの終端コーナ部に突き当てられて、２つ折りに重ねられた仕切り板部４ａが、接着部を設けることなく、強固に固定されるようになっている。
【００２０】
図５（ａ）、（ｂ）に示すように、把手部材５ａは、天井に孔２０が開けられたキャップ状とされ、キャップ口の内周面にねじ２１が切られている。一方、把手部材５ｂは、前記各丸孔８、１６に嵌まり込む円筒部２２の外周面にねじ２３が切られ、その基端側に各丸孔８、１６よりも大径の角形フランジ２４が設けられている。また、円筒部２２の底には、胴枠部材１と同じ淡青色の円形ブランク２５が嵌め込まれるようになっている。
【００２１】
図１に示したように、互いに重ね合わされる側壁部１ａと立壁部３ｂの外面側に把手部材５ａを、内面側に把手部材５ｂを持って行き、把手部材５ｂの円筒部２２を、重ね合わされる各丸孔８、１６に内側から挿入して、外側から把手部材５ａのキャップ口のねじ２１を円筒部２２のねじ２３に螺合することにより、側壁部１ａと立壁部３ｂとが、把手部材５ｂのフランジ２４と把手部材５ａのキャップ口とで挟持される。このとき、把手部材５ｂのフランジ２４は、前述した折り曲げ片４ｂの一対の半丸孔１９が合体された丸孔に嵌まり込む。
【００２２】
図６（ａ）、（ｂ）は、上述した紙箱を収納ケースとして組み立てた状態を示す。（ａ）は縦断側面図、（ｂ）は縦断正面図である。収納ケースの底面は、２つの底板部材２、３の重ねられた底板部２ａ、３ａで内外面とも平滑に形成されている。また、各底板部材２、３は、それぞれの立壁部２ｂ、３ｂと胴枠部材１の各側壁部１ｂ、１ａ内面との摩擦抵抗、および折り返し部２ｃ、３ｃの各側壁部１ｂ、１ａ上端への引っ掛かり抵抗により、胴枠部材１に強固に抜け止めされているので、この収納ケースは、本等の重量物を収納しても、底抜けすることはない。
【００２３】
図７は、上記紙箱を天面開口が上向きの収納ケースとして、別途に用意されるケース枠Ａに出し入れする状態を示す。この収納ケースは、底面が内外面とも平滑であるので、把手部材５ａを持ってスムーズにケース枠Ａに出し入れでき、かつ、内部の収納物が底面に引っ掛かったりする心配もない。また、前述したように、胴枠部材１と、各底板部材２、３および仕切り板部材４とが別の色とされているので、ツートーンカラーのデザインを楽しむことができる。勿論、胴枠部材１や底板部材２、３等に絵柄等をデザインすることもできる。
【００２４】
なお、この紙箱は、天面開口が横向きの収納ケースとしても使用することができ、このときに仕切り板部４ａを水平方向に向ければ、仕切り板部４ａを棚板として使用することができる。
【００２５】
図８および図９は、第２の実施形態を示す。この紙箱も段ボール紙製の収納ケースであり、段ボール紙製の蓋２６を設けた点が第１の実施形態のものと異なる。箱本体は、把手がないことを除いて、第１の実施形態のものと同じである。
【００２６】
蓋２６は、仕切りがないことを除いて、箱本体と同じ組み立て構造であり、箱本体よりも僅かに大きい矩形枠の胴枠部材２７と２つの底板部材２８、２９とから成る。各底板部材２８、２９は、第１の実施形態のものと同様に、底板部２８ａ、２９ａの両側に一対の立壁部２８ｂ、２９ｂが設けられ、各立壁部２８ｂ、２９ｂの先端に折り返し部２８ｃ、２９ｃが設けられており、各立壁部２８ｂ、２９ｂが胴枠部材２７の４面の側壁部２７ａの内面に重ね合わされて、各折り返し部２８ｃ、２９ｃが各側壁部２７ａの上端から外側に折り返される。この紙箱は段積みの収納ケースとして使用することができ、対向する一対の側壁に、持ち上げ用の把手部材を取り付けてもよい。この把手部材も、第１の実施形態の把手部材５ａ、５ｂのように、立壁部２８ｂ、２９ｂのいずれか一方と側壁部２７ａとを内外から挟持するものとすることができる。
【００２７】
なお、この紙箱は、蓋２６を箱本体の底側に嵌め込み、陳列ケースとして用いることもできる。箱本体および蓋２６は厚紙製としてもよく、紙箱を小寸法のものとすれば、菓子類、食品類、装飾品類、玩具類等の陳列用小箱として用いることもできる。
【００２８】
図１０および図１１は、第３の実施形態を示す。この紙箱は、図１０（ａ）に示すように、段ボール紙製の荷造り用ケースであり、矩形枠の胴枠部材３０に嵌め込まれる２つの底板部材３１、３２が、各底板部３１ａ、３２ａの両側の立壁部３１ｂ、３２ｂの先端に、折り返し部の替わりに天面フラップ３１ｃ、３２ｃを設けられている点が第１の実施形態のものと異なる。把手と仕切りがないことを除いて、その他の部分は、第１の実施形態のものと同じである。
【００２９】
この荷造り用ケースでは、図１０（ｂ）、図１１に示すように、底板部３１ａが下側に嵌め込まれる底板部材３１の天面フラップ３１ｃが内フラップとされ、底板部材３２の天面フラップ３２ｃが外フラップとされて、天面フラップ３１ｃの折り畳みにより、底板部材３２の各立壁部３２ｂが内側へ倒れ込まないようになっている。したがって、全ての立壁部３１ｂ、３２ｂが胴枠部材３０の４面の側壁部３０ａの内面に重ね合わされ、これらの重ね合わせによる摩擦抵抗で、各底板部材３１、３２が胴枠部材３０に抜け止めされている。なお、各天面フラップ３１ｃ、３２ｃを折り畳んだのち、外フラップである天面フラップ３２ｃが荷造り用テープ等で固定される。
【００３０】
上述した各実施形態では、胴枠部材を長方形枠のものとしたが、正方形枠のものとしてもよい。また、第１の実施形態における把手部材は、内外の部材を螺合させて、重ね合わされた側壁部と立壁部を挟持するものとしたが、把手部材はこの実施形態のものに限定されることはなく、側壁部と立壁部を内外から挟持するものであればよい。
【００３１】
【発明の効果】
以上のように、この発明の紙箱は、いずれも単純形状の帯状の板紙ブランクを折り曲げて形成される胴枠部材と２つの底板部材との３ピースで構成し、各底板部材を底板部の両側に一対の立壁部を形成したものとして、各底板部材の底板部を上下に重ねて胴枠部材の底面開口へ嵌め込み、それぞれの一対の立壁部を、胴枠部材の直交する別々の対の側壁部内面に重ね合わせるようにしたので、底面に凹凸をなくして、互いに重ね合わされる胴枠部材の側壁部と各底板部材の立壁部との摩擦抵抗で底抜けに対する十分な強度を確保でき、かつ、組み立ても簡単に行うことができる。
【００３２】
また、前記各底板部材の一対の立壁部の先端に、それぞれが重ね合わされる胴枠部材の側壁部の上端から外側に折り返される折り返し部を設ければ、各折り返し部の側壁部上端への引っ掛かり効果で、底抜けに対する強度をさらに高めることができ、折り返し部の替わりに内折りされる天面フラップを設ければ、紙箱をそのまま荷造り用に用いることができる。
【００３３】
さらに、前記紙箱の対向する一対の側壁間に差し渡される板紙製の仕切り板部材を設け、この仕切り板部材を、上端で２つ折りにして重ね合わされる各仕切り板部の両側端に、一対の対向する側壁の内面に沿わされる折り曲げ片を形成したものとし、これらの各折り曲げ片の先端を、それぞれが沿わされる側壁の終端コーナ部に突き当てることにより、接着部を設けることなく、紙箱に剛性のある仕切り板を形成することができる。
【図面の簡単な説明】
【図１】第１の実施形態の紙箱を示す分解斜視図
【図２】ａは図１の胴枠部材の展開図、ｂはａの胴枠部材を折り畳んだ状態を示す斜視図
【図３】ａ、ｂは、それぞれ図１の底板部材の展開図
【図４】図１の仕切り板部材の展開図
【図５】ａ、ｂは、それぞれ図１の把手部材の外観斜視図
【図６】ａは図１の紙箱を組み立てた状態を示す縦断側面図、ｂはａの縦断正面図
【図７】図６の紙箱の外観斜視図
【図８】第２の実施形態の紙箱を示す分解斜視図
【図９】図８の紙箱の一部切欠き側面図
【図１０】ａは第３の実施形態の紙箱を示す外観斜視図、ｂはａの紙箱の天面フラップを畳んだ状態を示す外観斜視図
【図１１】図１０の紙箱の縦断側面図
【符号の説明】
１ 胴枠部材
１ａ、１ｂ 側壁部
２、３ 底板部材
２ａ、３ａ 底板部
２ｂ、３ｂ 立壁部
２ｃ、３ｃ 折り返し部
４ 仕切り板部材
４ａ 仕切り板部
４ｂ 折り曲げ片
５ａ、５ｂ 把手部材
６ 折り目線
７ 継ぎ代
８ 丸孔
９、１０、１１、１２、１３ 折り目線
１４、１５ 粘着テープ
１６ 丸孔
１７、１８ 折り目線
１９ 半丸孔
２０ 孔
２１ ねじ
２２ 円筒部
２３ ねじ
２４ フランジ
２５ ブランク
２６ 蓋
２７ 胴枠部材
２７ａ 側壁部
２８、２９ 底板部材
２８ａ、２９ａ 底板部
２８ｂ、２９ｂ 立壁部
２８ｃ、２９ｃ 折り返し部
３０ 胴枠部材
３０ａ 側壁部
３１、３２ 底板部材
３１ａ、３２ａ 底板部
３１ｂ、３２ｂ 立壁部
３１ｃ、３２ｃ 天面フラップ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paper box using cardboard such as corrugated paper or cardboard.
[0002]
2. Description of the Related Art
Paper boxes using paperboard are widely used for packing, storage cases, display cases, and the like. Corrugated paper is often used for relatively large-sized paper boxes for packing and storage cases, and cardboard is often used for small-sized paper boxes for display cases and the like.
[0003]
There are various types of these paper boxes, but a one-piece type in which a bottom flap forming a bottom surface and a top flap forming a top surface are integrally provided on a body frame portion forming a side wall is most common. The one-piece type paper box has an advantage of having a small number of adhesive portions at the time of assembly, but has a drawback that unevenness is generated on the bottom surface formed by inserting and overlapping the bottom flaps. In addition, in order to ensure sufficient strength against bottoming out, not only the bottom flaps of the overlapping type but also the plug-in type ones have a problem that the reinforcing tape needs to be attached. Further, since the one-piece type paper box has a complicated blank shape, there is a problem in that the efficiency of blank picking is reduced. If the bottom flap is plug-in type, the blank shape becomes more complicated.
[0004]
On the other hand, the conventional multi-piece paper box requires a large number of adhesive portions for joining pieces together, and has a problem that it takes a lot of time to assemble because the adhesive area becomes large.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper box which has no irregularities on the bottom surface, has sufficient strength against bottoming out, and can be easily assembled with a blank having a simple shape.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a paper box of the present invention comprises a body frame member formed by bending four side walls from a band-shaped paperboard blank to form a rectangular frame, and a band-shaped paperboard blank formed from a band-shaped paperboard blank. It is composed of two bottom plate members formed by bending a pair of standing wall portions on both sides, the bottom plate portions of the respective bottom plate members are vertically overlapped and fitted into the bottom opening of the body frame member, and each of the pair of standing wall portions, A configuration is adopted in which the body frame member is superimposed on inner surfaces of a pair of mutually orthogonal side walls.
[0007]
That is, the paper box is composed of three pieces of a body frame member and two bottom plate members formed by bending a simple strip-shaped paperboard blank, and each bottom plate member is provided with a pair of standing wall portions on both sides of the bottom plate portion. As formed, the bottom plate portions of the bottom plate members are vertically overlapped and fitted into the bottom opening of the body frame member, and each pair of upright walls is overlapped on the inner surface of a pair of orthogonal side walls of the body frame member. As a result, the bottom surface has no irregularities, and a sufficient strength against bottom-out can be obtained by frictional resistance between the side wall portion of the body frame member and the standing wall portion of each bottom plate member which are superimposed on each other.
[0008]
By providing a folded portion that is folded outward from the upper end of the side wall portion of the body frame member that is superimposed on each other at the tips of the pair of standing wall portions of each of the bottom plate members, a hooking effect of each folded portion on the upper end of the side wall portion is provided. Thus, the strength against bottom-out can be further increased.
[0009]
By providing top flaps that are folded inward at the upper ends of the side wall portions of the body frame member that are superimposed on each other at the tips of the pair of standing wall portions of each of the bottom plate members, the paper box can be used for packing as it is. .
[0010]
By providing a vertically extending fold line on a pair of opposed side wall portions of the body frame member in a point-symmetric manner with respect to the frame center of the body frame member, the body frame member is compactly folded, and the product is shipped or sold at a store. Can be exhibited.
[0011]
A paperboard partition plate member provided between a pair of opposed side walls of the paper box is provided, and the partition plate member is folded at the upper end into two parts, and the pair of opposed plate members is provided on both side ends of each partition plate portion. A bent piece is formed along the inner surface of the side wall to be formed, and the tip of each of the bent pieces is brought into contact with the end corner of the side wall along which the bent piece is formed, so that the paper box can be formed without providing an adhesive part. A partition plate can be formed. Since this partition plate has high rigidity by abutting each bent piece against the side wall end corner portion, it can also serve as a shelf plate when a storage case or the like having a top surface sideways is used.
[0012]
A through hole is provided in the at least one side wall portion and the upright wall portion superimposed on the inner surface thereof, and a handle member that is passed through the through hole and sandwiches the overlapped side wall portion and the upright wall portion from inside and outside. By attaching the handle, the handle member can be used as a handle for lifting a paper box or a handle for pulling out a storage case. Further, the attachment of the handle member has an effect of increasing the frictional resistance between the overlapped side wall portion and the standing wall portion, and increasing the strength against the bottom out.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. 1 to 7 show a first embodiment. This paper box is a storage case made of corrugated paper, and as shown in FIG. 1, is composed of a body frame member 1, two bottom plate members 2, 3 and a partition plate member 4, and a pull-out handle member 5a is provided on one side wall. , 5b. The surface of the body frame member 1 is light blue, and the surfaces of the bottom plate members 2 and 3 and the partition plate member 4 are dark blue, and are assembled as a two-tone color storage case.
[0014]
As shown in FIG. 2 (a), the body frame member 1 is a strip-shaped blank, which is bent at four fold lines 6 and bonded with a seam allowance 7, and a pair of long and short side walls 1a and 1b form a rectangular frame. Is formed. A round hole 8 for attaching the handle members 5a and 5b is provided in one of the side walls 1a on the long side.
[0015]
In addition, a fold line 9 extending vertically at the center is provided on each side wall portion 1b on the short side, and as shown in FIG. It can be folded compactly at the fold line 9. Note that each fold line 9 may be shifted from the center of each side wall portion 1b as long as it is point-symmetric with respect to the frame center of the body frame member 1.
[0016]
As shown in FIGS. 3A and 3B, each of the bottom plate members 2 and 3 is also a strip-shaped blank, and a pair of standing wall portions 2b and 3b are provided on both sides of the bottom plate portions 2a and 3a, respectively. Folded portions 2c, 3c are provided at the tips of 2b, 3b. The standing walls 2b, 3b are erected at fold lines 10, 11, respectively, and the folds 2c, 3c are folded at fold lines 12, 13. Adhesive tapes 14 and 15 covered with a cover tape are adhered to the back surfaces of the folded portions 2c and 3c, and a round hole 16 for attaching the handle members 5a and 5b is provided on one of the standing wall portions 3b. I have.
[0017]
As shown in FIG. 1, the bottom plate portion 2a of the bottom plate member 2 is first fitted into the bottom opening of the body frame member 1, and the pair of upright wall portions 2b is superimposed on the inner surface of each short side wall 1b. After each folded portion 2c is folded outward from the upper end of the side wall portion 1b, the bottom plate portion 3a of the bottom plate member 3 is fitted over the bottom plate portion 2a so as to overlap with the pair of upright wall portions 3b. Each folded portion 3c is folded outward from the upper end of the side wall portion 1a so as to overlap the inner surface of the side wall portion 1a. The folded portions 2c, 3c are adhered to the outer surfaces of the side walls 1b, 1a with adhesive tapes 14, 15, respectively. In addition, the round hole 16 of the upright wall 3b overlaps with the round hole 8 of the side wall 1a.
[0018]
As shown in FIG. 4, the partition plate member 4 has a pair of partition plate portions 4a provided symmetrically on both sides of a central fold line 17, and a bent piece 4b is provided on each side end of each partition plate portion 4a with a fold line 18. Is provided via The two bent pieces 4b on one side are provided with a pair of semi-circular holes 19 into which a flange 24 of a handle member 5b described later is fitted.
[0019]
As shown in FIG. 1, the pair of partition plates 4a are folded in two at the fold line 17, and each bent piece 4b is spread right and left at the fold line 18 so as to be along the inner surface of the upright wall 3b. Bendable. The side length of the bent piece 4b which is expanded and bent right and left is formed to be equal to the side length of the side wall portion 1a on the long side of the body frame member 1, and the tip of each bent piece 4b is formed at the end corner of the side wall portion 1a. The partition plate portion 4a, which is abutted against the portion and folded in two, is firmly fixed without providing an adhesive portion.
[0020]
As shown in FIGS. 5A and 5B, the handle member 5a is formed in a cap shape having a hole 20 in the ceiling, and a screw 21 is cut in an inner peripheral surface of the cap opening. On the other hand, the handle member 5b is provided with a screw 23 on the outer peripheral surface of the cylindrical portion 22 fitted into each of the round holes 8 and 16, and a rectangular flange 24 having a larger diameter than the round holes 8 and 16 on its base end side. Is provided. Further, the same light blue circular blank 25 as that of the body frame member 1 is fitted into the bottom of the cylindrical portion 22.
[0021]
As shown in FIG. 1, the handle member 5a is carried on the outer surface side of the side wall portion 1a and the upright wall portion 3b, and the handle member 5b is carried on the inner surface side, and the cylindrical portion 22 of the handle member 5b is overlaid. By inserting the screw 21 of the cap opening of the handle member 5a into the screw 23 of the cylindrical portion 22 from the outside by inserting the screw 21 into the round hole 8, 16 from the inside, the side wall portion 1a and the standing wall portion 3b are connected to the handle. It is sandwiched between the flange 24 of the member 5b and the cap opening of the handle member 5a. At this time, the flange 24 of the handle member 5b fits into the round hole where the pair of semi-round holes 19 of the bent piece 4b described above are united.
[0022]
FIGS. 6A and 6B show a state where the above-described paper box is assembled as a storage case. (A) is a vertical side view, and (b) is a vertical front view. The bottom surface of the storage case is smoothly formed on both the inner and outer surfaces by the bottom plate portions 2a, 3a on which the two bottom plate members 2, 3 are overlapped. In addition, the bottom plate members 2 and 3 are connected to the frictional resistance between the upright wall portions 2b and 3b and the inner surfaces of the side wall portions 1b and 1a of the body frame member 1 and the upper ends of the side wall portions 1b and 1a of the folded portions 2c and 3c. Is firmly stopped by the body frame member 1 due to the snagging resistance, so that the storage case does not fall out even when a heavy object such as a book is stored.
[0023]
FIG. 7 shows a state in which the paper box is put in and taken out of a separately prepared case frame A as a storage case with a top opening facing upward. Since the bottom surface of the storage case is smooth on both the inner and outer surfaces, the storage case can be smoothly put into and taken out of the case frame A by holding the handle member 5a, and there is no fear that the internal storage items are caught on the bottom surface. Further, as described above, since the body frame member 1, the bottom plate members 2, 3 and the partition plate member 4 have different colors, a two-tone color design can be enjoyed. Of course, a picture or the like can be designed on the body frame member 1, the bottom plate members 2, 3 or the like.
[0024]
In addition, this paper box can be used as a storage case having a top surface opening in the horizontal direction. At this time, if the partition plate portion 4a is oriented in the horizontal direction, the partition plate portion 4a can be used as a shelf plate.
[0025]
8 and 9 show a second embodiment. This paper box is also a storage case made of corrugated paper, and is different from that of the first embodiment in that a lid 26 made of corrugated paper is provided. The box body is the same as that of the first embodiment except that there is no handle.
[0026]
The lid 26 has the same assembling structure as the box main body except that there is no partition, and includes a body frame member 27 of a rectangular frame slightly larger than the box main body and two bottom plate members 28 and 29. Each of the bottom plate members 28 and 29 is provided with a pair of upright wall portions 28b and 29b on both sides of the bottom plate portions 28a and 29a, similarly to the first embodiment, and a folded portion 28c is provided at the tip of each of the upright wall portions 28b and 29b. , 29c are provided, and the upright wall portions 28b, 29b are superimposed on the inner surfaces of the four side wall portions 27a of the body frame member 27, and the folded portions 28c, 29c are folded outward from the upper ends of the side wall portions 27a. It is. This paper box can be used as a stacking storage case, and a pair of opposing side walls may be provided with a lifting handle member. Like the handle members 5a and 5b of the first embodiment, this handle member can also sandwich one of the upright walls 28b and 29b and the side wall 27a from inside and outside.
[0027]
In addition, this paper box can be used as a display case by fitting the lid 26 to the bottom side of the box body. The box main body and the lid 26 may be made of cardboard, and if the paper box is of a small size, it can be used as a display small box for confectionery, foods, decorations, toys, and the like.
[0028]
10 and 11 show a third embodiment. As shown in FIG. 10A, this paper box is a packing case made of corrugated paper, and two bottom plate members 31 and 32 fitted into a rectangular frame member 30 are provided with respective bottom plate portions 31a and 32a. The difference from the first embodiment is that top flaps 31c and 32c are provided at the ends of the standing wall portions 31b and 32b on both sides instead of the folded portions. Other parts are the same as those of the first embodiment, except that there is no handle and partition.
[0029]
In this packing case, as shown in FIGS. 10B and 11, the top flap 31c of the bottom plate member 31 into which the bottom plate portion 31a is fitted below is an inner flap, and the top flap 32c of the bottom plate member 32 is provided. Are the outer flaps, and the folding of the top flap 31c prevents each of the upright wall portions 32b of the bottom plate member 32 from falling inward. Therefore, all the upright wall portions 31b and 32b are superimposed on the inner surfaces of the four side wall portions 30a of the body frame member 30, and the bottom plate members 31 and 32 are prevented from falling out of the body frame member 30 by frictional resistance due to the superposition. Have been. After folding the top flaps 31c and 32c, the top flap 32c, which is the outer flap, is fixed with packing tape or the like.
[0030]
In each of the above-described embodiments, the body frame member has a rectangular frame, but may have a square frame. Further, the handle member in the first embodiment is formed by screwing the inner and outer members to sandwich the overlapped side wall portion and the standing wall portion, but the handle member is not limited to this embodiment. Instead, any material may be used as long as it sandwiches the side wall and the standing wall from inside and outside.
[0031]
【The invention's effect】
As described above, the paper box of the present invention is constituted by three pieces of the body frame member and the two bottom plate members formed by bending a simple strip-shaped paperboard blank, and each bottom plate member is formed on both sides of the bottom plate portion. The bottom plate portions of each bottom plate member are vertically overlapped and fitted into the bottom opening of the body frame member, and each pair of upright wall portions is formed as a pair of orthogonal side walls of the body frame member. Since it was made to overlap on the inner surface of the part, it is possible to secure sufficient strength against bottom loss by frictional resistance between the side wall part of the body frame member and the standing wall part of each bottom plate member, which eliminates irregularities on the bottom surface, Assembly is also easy.
[0032]
In addition, if the folded portions that are folded back from the upper ends of the side wall portions of the body frame member that are superimposed on each other are provided at the tips of the pair of standing wall portions of each of the bottom plate members, the folded portions are caught on the upper ends of the side wall portions. By this effect, the strength against the bottoming out can be further increased, and if a top flap that is folded inward is provided instead of the folded portion, the paper box can be used as it is for packing.
[0033]
Further, a paperboard partition plate member provided between a pair of opposing side walls of the paper box is provided. A bent piece is formed along the inner surface of the opposing side wall, and a tip of each of the bent pieces is brought into contact with a terminal corner portion of the side wall along which the bent piece is formed, so that a paper box is provided without providing an adhesive portion. A rigid partition plate can be formed.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a paper box according to a first embodiment; FIG. 2a is a developed view of a trunk frame member of FIG. 1, and b is a perspective view showing a state in which the trunk frame member of a is folded; A and b are development views of the bottom plate member of FIG. 1 respectively. FIG. 4 is a development view of the partition plate member of FIG. 1. FIG. 5 a and b are appearance perspective views of the handle member of FIG. A is a vertical sectional side view showing a state in which the paper box of FIG. 1 is assembled; b is a vertical sectional front view of a; FIG. 7 is an external perspective view of the paper box of FIG. 6; FIG. 9 is a partially cutaway side view of the paper box of FIG. 8; FIG. 10a is an external perspective view showing the paper box of the third embodiment; FIG. FIG. 11 is a longitudinal sectional side view of the paper box shown in FIG.
DESCRIPTION OF SYMBOLS 1 Body frame member 1a, 1b Side wall part 2, 3 Bottom plate member 2a, 3a Bottom plate part 2b, 3b Standing wall part 2c, 3c Folding part 4 Partition plate member 4a Partition plate part 4b Bending piece 5a, 5b Handle member 6 Fold line 7 Joint Charge 8 Round hole 9,10,11,12,13 Fold line 14,15 Adhesive tape 16 Round hole 17,18 Fold line 19 Half round hole 20 Hole 21 Screw 22 Cylindrical part 23 Screw 24 Flange 25 Blank 26 Cover 27 Body frame Member 27a Side wall portion 28, 29 Bottom plate member 28a, 29a Bottom plate portion 28b, 29b Erect wall portion 28c, 29c Folded portion 30 Body frame member 30a Side wall portion 31, 32 Bottom plate member 31a, 32a Bottom plate portion 31b, 32b Erect wall portion 31c, 32c Face flap
