JP3540295B2

JP3540295B2 - Box forming equipment

Info

Publication number: JP3540295B2
Application number: JP2001212540A
Authority: JP
Inventors: 好夫佐藤
Original assignee: Toyo Koki Co Ltd
Current assignee: Toyo Koki Co Ltd
Priority date: 2001-07-12
Filing date: 2001-07-12
Publication date: 2004-07-07
Anticipated expiration: 2021-07-12
Also published as: JP2003025466A

Description

【０００１】
【発明の属する技術分野】
本発明は、一枚のシート状のブランクを折り畳んで四角筒状で側壁間に蛇腹部を備えて形成され、例えばワインの瓶等の壊れ易い物を収容したときにこの蛇腹部をクッションとして作用させることのできる箱の成形装置に関する。
【０００２】
【従来の技術】
近年、図１４乃至図１６に示すような箱１が開発されている。この箱１は、矩形の底壁２，底壁２に連続する矩形の４つの側壁３，隣接する側壁３間に形成され谷部４ａ及び山部４ｂが交互に連続する蛇腹部４を備えて構成されている。５は箱１の開口部１ａに嵌合してこれを塞ぐ蓋である。
この箱１は、図１６に示すように、正方形の紙製シート状のブランク１０のコーナ部１１を矩形に切り欠き、このブランク１０の中央に矩形の底壁２を底壁折れ線１２で区画し、この底壁２の各底壁折れ線１２に連続する矩形の４つの側壁３を底壁折れ線１２及び側壁折れ線１３で区画し、この側壁３の側壁折れ線１３の間に形成され蛇腹部４を形成する余エリア１４にブランク１０のコーナ点Ｐ1 と底壁２のコーナ点Ｐ2 とを結ぶ対角折れ線１５を形成し、この余エリア１４にその各外側辺から対角折れ線１５まで外側辺がある側の側壁折れ線１３に平行かつ所定ピッチＰで内側に凹になる谷部折れ線１６及び外側に凸になる山部折れ線１７を交互に設け、そして、図１５に示すように、このブランク１０を各折れ線に沿って折り畳んで、図１４に示すように、四角筒状に形成される。
従来、この箱１の成形は、予め、プレス機等を用いてブランク１０に折れ線を形成して折曲し易いようにしておき、この折れ線が形成されたブランク１０を手作業で折り曲げて行なっていた。
この箱１によれば、一枚のブランク１０をほとんどそのまま用いるので無駄がなく、また、切込を入れたり糊付けをする等の煩雑な作業を行なわなくても製造できる。そして、例えばワインの瓶等の壊れ易い物の収容に使用すると、蛇腹部４がクッションとして作用し、壊れにくくして搬送することができるようになるとともに、デザイン的にも斬新でおもしろい等の利点がある。
【０００３】
【発明が解決しようとする課題】
ところで、従来において、この箱１は、折り込みが複雑なので、手作業で折り畳み成形しており、そのため、大量生産ができにくいという問題があった。また、機械化も、折り込みが複雑なので、どのように機械化するかの発想がでにくく、実現できていないというのが実情であった。
本発明は上記の問題点に鑑みて為されたもので、複雑な折り込みに対応できる機械化を実現して自動化を図り、大量生産が容易にできるようにした箱の成形装置を提供することを目的とする。
【０００４】
【課題を解決するための手段】
このような目的を達成するため、本発明の箱の成形装置は、シート状のブランクを折れ線に沿って折り畳んで四角筒状に形成され、矩形の底壁，該底壁に連続する矩形の４つの側壁，隣接する側壁間に形成され谷部及び山部が交互に連続する蛇腹部を備えた箱の成形装置において、基台に設けられ上記箱の内側を成形する柱状の内側成形ブロックと、上記基台に回動可能に設けられ上記ブランクの互いに対向する一対の側壁及び該側壁の両側にあり上記蛇腹部を構成する余エリアを上記折り畳まれるブランクの外側から折れ線に沿って折り曲げて起立させる一対の主外側成形盤と、上記基台に回動可能に設けられ上記ブランクの互いに対向する一対の別の側壁を上記折り畳まれるブランクの外側から折れ線に沿って折り曲げて起立させる一対の従外側成形盤と、上記主外側成形盤に設けられ上記余エリアの折れ線に当接しかつ該折れ線のピッチの縮みに追従して移動して該折れ線を凹に折り込む複数の谷部折り板と、上記基台の上部に垂下されて設けられるとともに上記従外側成形盤に設けられ上記折り畳まれるブランクの内側から上記余エリアの折れ線に当接しかつ該折れ線のピッチの縮みに追従して移動して該折れ線を凸に折り込む複数の山部折り板とを備えた構成としている。
【０００５】
この箱の成形装置によって箱を成形するときは、先ず、主外側成形盤及び従外側成形盤の平面位置において、ブランクを主外側成形盤及び従外側成形盤の上に載置する。
次に、主外側成形盤を平面位置から起立位置に回動させる。これにより、ブランクの互いに対向する一対の側壁及び該側壁の両側にあり蛇腹部を構成する余エリアが折れ線において折曲させられて起立させられていくとともに、主外側成形盤の谷部折り板がブランクの谷部折れ線に当接し、この谷部折れ線が内側に凹になるように折曲させられていく。この場合、谷部折れ線のピッチが徐々に縮んで谷部折り板が力を受けるが、谷部折り板は折れ線のピッチの縮みに追従して移動していくので、無理な力が作用することなく、円滑に谷部の折り曲げが行なわれる。
また、主外側成形盤が起立位置に至る過程で、山部折り板に山部折れ線が当接し、これにより、山部折れ線が外側に凸に折曲させられていく。この場合、山部折れ線のピッチが徐々に縮んでいき、山部折り板が力を受けるが、山部折り板は折れ線のピッチの縮む方向に移動していくので、無理な力が作用することなく、円滑に山部の折り曲げが行なわれる。
次に、従外側成形盤を平面位置から起立位置に回動させる。これにより、別の側壁が折れ線において折曲させられて起立させられていく。これに伴って、主外側成形盤の谷部折り板の当接する谷部折れ線が更に折曲させられていく。この場合、折れ線のピッチが更に縮んでいき、谷部折り板が折れ線のピッチの縮み方向に更に力を受けるが、ピッチの縮みに追従して移動するので、無理な力が作用することなく、円滑に谷部の折り曲げが行なわれる。
このようにして、箱が成形されていく。即ち、主外側成形盤及び従外側成形盤を回動させれば、ブランクを折れ線に沿って折り畳んで四角筒状に成形することができ、極めて簡単に箱を成形することができ、複雑な折り込みに対応できる機械化を実現して自動化を図り、箱の大量生産を容易にすることができる。
【０００６】
そして、必要に応じ、上記内側成形ブロックを上記基台に上下動可能に設け、該内側成形ブロックの下動時に該内側成形ブロック及び折り畳まれたブランクが通過し通過時に側壁を直立状態に成形する成形面を有した成形孔部を設けた構成としている。
これにより、内側成形ブロックを、下方に押し出すと、折り畳まれたブランクが成形孔部を通過し、内側成形ブロック及び成形孔部によって、側壁が直立状態に折曲され、谷部及び山部が確実に折曲され、箱が成形される。
【０００７】
更に、詳しくは、本発明の箱の成形装置は、矩形の底壁，該底壁に連続する矩形の４つの側壁，隣接する側壁間に形成され谷部及び山部が交互に連続する蛇腹部を備えた箱であって、略矩形シート状のブランクの中央に矩形の底壁を底壁折れ線で区画し、該底壁の各底壁折れ線に連続する矩形の４つの側壁を上記底壁折れ線及び側壁折れ線で区画し、該側壁の側壁折れ線の間に形成され上記蛇腹部を形成する余エリアに上記ブランクのコーナ点と上記底壁のコーナ点とを結ぶ対角折れ線を形成し、該余エリアにその各外側辺から上記対角折れ線まで該外側辺がある側の側壁折れ線に平行かつ所定ピッチで内側に凹になる谷部折れ線及び外側に凸になる山部折れ線を交互に設け、該ブランクを上記折れ線に沿って折り畳んで四角筒状に形成される箱の成形装置において、
基台に設けられ上記折り畳まれるブランクの底壁の内面に対面する底面及び側壁の内面に対面する４つの側面を有して箱の内側を成形する柱状の内側成形ブロックと、上記基台に回動可能に設けられ上記ブランクの互いに対向する一対の側壁及び該側壁の両側の余エリアを夫々平面状に支持する平面位置及び回動させられて上記互いに対向する一対の側壁及び該側壁の両側の余エリアを押圧し夫々底壁折れ線及び側壁折れ線に沿って折り曲げて上記平面位置から上記側壁が上記内側成形ブロックに沿うように起立させる起立位置の２位置に移動させられる一対の主外側成形盤と、上記基台に回動可能に設けられ上記ブランクの互いに対向する一対の別の側壁を夫々平面状に支持する平面位置及び回動させられて該別の側壁を押圧し底壁折れ線に沿って折り曲げて上記平面位置から起立させる起立位置の２位置に移動させられる一対の従外側成形盤と、上記主外側成形盤に設けられ該主外側成形盤によって起立させられる側壁と余エリアの対角折れ線との間の谷部折れ線にその一側縁が当接しかつ谷部折れ線のピッチの縮みに追従して移動して該谷部折れ線を凹に折り込む複数の第一谷部折り板と、上記主外側成形盤に設けられ上記従外側成形盤によって起立させられる別の側壁と余エリアの対角折れ線との間の谷部折れ線にその一側縁が当接しかつ谷部折れ線のピッチの縮みに追従して移動して該谷部折れ線を凹に折り込む複数の第二谷部折り板と、上記基台の上部から垂下され上記折り畳まれるブランクの内側から上記主外側成形盤によって起立させられる側壁と余エリアの対角折れ線との間の山部折れ線にその両側縁が当接しかつ該山部折れ線のピッチの縮みに追従して移動して該山部折れ線を凸に折り込む複数の第一山部折り板と、上記従外側成形盤の先端部に立設された立設部材に設けられ上記折り畳まれるブランクの内側から該従外側成形盤によって起立させられる別の側壁と余エリアの対角折れ線との間の山部折れ線にその両側縁が当接しかつ該山部折れ線のピッチの縮みに追従して移動して該山部折れ線を凸に折り込む複数の第二山部折り板とを備えた構成としている。
【０００８】
これにより、上記の作用に加えて、第一谷部折り板，第二谷部折り板，第一山部折り板，第二山部折り板により各折り板を折れ線のピッチの縮みに追従させて谷部及び山部を折り畳んで蛇腹部を成形するので、折られる側壁の移動方向によるブランク各部の条件に応じた折り畳みをすることができ、それだけ、無理な力が作用することなく、円滑に折り曲げを行なうことができ、より一層折り畳みをしっかりと確実にすることができ、箱の姿を確実にすることができる。
そしてまた、必要に応じ、上記内側成形ブロックを上記基台に上下動可能に設け、該内側成形ブロックの下動時に該内側成形ブロック及び折り畳まれたブランクが通過し通過時に側壁を直立状態に成形する成形面を有した成形孔部を設け、該成形孔部を上記回動する一対の主外側成形盤及び一対の従外側成形盤の基端部で構成した構成としている。外側成形盤を利用して成形孔部を設けているので、別途型を設けることなく構造を簡略化できる。
【０００９】
また、必要に応じ、上記各第一谷部折り板及び第二谷部折り板を、上記余エリアの谷部折れ線の上記余エリアの外側辺から上記対角折れ線までの長さに合わせて形成し、該各第一谷部折り板をその他側縁側で第一ベースに取付け、該第一ベースを上記主外側成形盤に上記谷部折れ線に当接する初期位置から該第一谷部折り板が当接する谷部折れ線のピッチの縮む方向に移動可能に設け、該第一ベースを上記初期位置方向に上記谷部折れ線のピッチの縮みにより縮小可能な第一スプリングで付勢し、上記各第二谷部折り板をその他側縁側で第二ベースに取付け、該第二ベースを上記主外側成形盤に上記谷部折れ線に当接する初期位置から該第二谷部折り板が当接する谷部折れ線のピッチの縮む方向に揺動可能に設け、該第二ベースを上記初期位置方向に上記谷部折れ線のピッチの縮みにより縮小可能な第二スプリングで付勢した構成としている。スプリングの付勢力を適宜に定めて、第一谷部折り板及び第二谷部折り板を移動させることができるので、側壁の移動による各部の条件に応じた折り畳みをすることができ、より一層折り畳みを確実にすることができる。
【００１０】
更に、必要に応じ、上記第二谷部折り板を、上記第二ベースに対して傾動可能にかつ反傾動方向にバネ材で付勢して取付け、上記主外側成形盤が起立位置に至る過程で箱に押されて上記バネ材の付勢力に抗して傾動し上記谷部から脱出可能に構成している。無理な力が作用することなく、円滑に谷部の折り曲げを行なうことができる。
更にまた、上記各第一山部折り板及び第二山部折り板を、上記余エリアの山部折れ線の上記余エリアの外側辺から上記対角折れ線までの長さに合わせて形成し、該各第一山部折り板をその一端部で第一スライダに取付け、該第一スライダを上記基台の上部に上記山部折れ線に当接する初期位置から該第一山部折り板が当接する山部折れ線のピッチの縮む方向に移動可能に設け、該第一スライダを上記初期位置方向に上記山部折れ線のピッチの縮みにより縮小可能な第一バネで付勢し、上記各第二山部折り板をその一端部で第二スライダに取付け、該第二スライダを上記従外側成形盤の立設部材に上記山部折れ線に当接する初期位置から該第二山部折り板が当接する山部折れ線のピッチの縮みに追従して移動可能に設け、該第二スライダを上記初期位置方向に上記山部折れ線のピッチの縮みにより縮小可能な第二バネで付勢した構成としている。バネの付勢力を適宜に定めて、第一山部折り板及び第二山部折り板を移動させることができるので、側壁の移動による各部の条件に応じた折り畳みをすることができ、より一層折り畳みを確実にすることができる。
【００１１】
また、必要に応じ、上記各第一山部折り板及び第二山部折り板を、可撓性部材で形成した構成としている。山部折れ線のピッチの縮み方向に更に力を受けても、撓んで曲がることから、無理な力が作用することなく、円滑に谷部の折り曲げを行なうことができる。
更に、必要に応じ、上記従外側成形盤の立設部材に、上記第二山部折り板と平行に上記従外側成形盤に対して開閉可能に設けられ、開時に上記ブランクの別の側壁を上記従外側成形盤に支持することを許容し閉時に該別の側壁を上記従外側成形盤に対して押える押え板を備えた構成としている。位置ずれが防止され、成形を確実に行なうことができる。
【００１２】
更にまた、必要に応じ、上記基台に、上記ブランクを平面状態で所定位置に位置決めする複数の位置決めピンを出没可能に設けた構成としている。位置決めを確実に行なうことができ、成形を確実に行なうことができる。
また、必要に応じ、上記位置決めピンの組を、ブランクの大きさに合わせて複数組設けた構成としている。１つの装置で大きさの異なる箱を作成することができ、汎用性を向上させることができる。
更に、必要に応じ、上記成形孔部を通過した箱を受ける受け部と、該受け部を基台の外部に移動させて箱を排出する排出機構とを設けた構成としている。自動的に製品を排出することができ、それだけ、製造効率を向上させることができる。
【００１３】
【発明の実施の形態】
以下、添付図面に基づいて、本発明の実施の形態に係る箱の成形装置について詳細に説明する。
図１乃至図７に示す本発明の実施の形態に係る箱の成形装置は、上述もしたように、図１４乃至図１６に示す箱１を成形するものである。この箱１は、矩形の底壁２，底壁２に連続する矩形の４つの側壁３，隣接する側壁３間に形成され谷部４ａ及び山部４ｂが交互に連続する蛇腹部４を備えて構成されている。尚、５は箱１の開口部１ａに嵌合してこれを塞ぐ蓋である。
この箱１は、図１６に示すように、正方形の紙製シート状のブランク１０のコーナ部１１を矩形に切り欠き、このブランク１０の中央に矩形の底壁２を底壁折れ線１２で区画し、この底壁２の各底壁折れ線１２に連続する矩形の４つの側壁３を底壁折れ線１２及び側壁折れ線１３で区画し、この側壁３の側壁折れ線１３の間に形成され蛇腹部４を形成する余エリア１４にブランク１０のコーナ点Ｐ1 と底壁２のコーナ点Ｐ2 とを結ぶ対角折れ線１５を形成し、この余エリア１４にその各外側辺から対角折れ線１５まで外側辺がある側の側壁折れ線１３に平行かつ所定ピッチＰで内側に凹になる谷部折れ線１６（図では各余エリア１４毎に３本（コーナ部１１を矩形に切り欠いた線を含む））及び外側に凸になる山部折れ線１７（図では各余エリア１４毎に２本）を交互に設け、そして、図１５に示すように、このブランク１０を各折れ線に沿って折り畳んで、図１４に示すように、四角筒状に形成される。
【００１４】
本発明の実施の形態に係る箱の成形装置において、２０は基台であって、上枠２１、中間枠２２、下枠２３を間隔を隔てて支柱２４で支持して構成されている。２５は下枠２３の下に設けられた補強枠である。
２６は基台２０の上枠２１に設けられ折り畳まれるブランク１０の底壁２の内面に対面する底面２６ａ及び側壁３の内面に対面する４つの側面２６ｂを有して箱１の内側を成形する柱状の内側成形ブロックである。内側成形ブロック２６は、基台２０に上下動可能に設けられている。詳しくは、内側成形ブロック２６は、上枠２１に設けたエアシリンダ装置２７のピストンに接続杆２８を介して取付けられ、エアシリンダ装置２７の駆動により、ピストンの後退時に定常位置にあり、ピストンの進出時に箱１を中間枠２２の下方に押し出す。
【００１５】
３０は一対の主外側成形盤であって、基台２０の中間枠２２に回動可能に設けられブランク１０の互いに対向する一対の側壁３及び側壁３の両側の余エリア１４を夫々平面状に支持する平面位置Ｘ1 及び回動させられて該互いに対向する一対の側壁３及び該側壁３の両側の余エリア１４を押圧し夫々底壁折れ線１２及び側壁折れ線１３に沿って折り曲げて上記平面位置Ｘ1 から側壁３が内側成形ブロック２６に沿うように略直角に起立させる起立位置Ｙ1 の２位置に移動させられる。３１は主外側成形盤３０を平面位置Ｘ1 及び起立位置Ｙ1 の２位置に移動させる複数のエアシリンダであり、主外側成形盤３０と下枠２３との間に架設されている。
【００１６】
３２は一対の従外側成形盤であって、基台２０の中間枠２２に回動可能に設けられブランク１０の互いに対向する一対の別の側壁３を夫々平面状に支持する平面位置Ｘ2 及び回動させられて該別の側壁３を押圧し底壁折れ線１２に沿って折り曲げて上記平面位置Ｘ2 から起立させる起立位置Ｙ2 の２位置に移動させられる。起立位置Ｙ2 の角度は実施の形態では約４５°（図１０参照）である。３３は従外側成形盤３２を平面位置Ｘ2 及び起立位置Ｙ2 の２位置に移動させるエアシリンダであり、従外側成形盤３２と下枠２３との間に架設されている。従外側成形盤３２のエアシリンダ３３は、主外側成形盤３０のエアシリンダ３１が作動した後に作動する。
【００１７】
４０は第一谷部折り板であって、主外側成形盤３０に設けられ主外側成形盤３０によって起立させられる側壁３（ａ）と余エリア１４の対角折れ線１５との間の谷部折れ線１６（図１６中Ｊ側）にその一側縁が当接しかつ谷部折れ線１６のピッチＰの縮みに追従して移動してこの谷部折れ線１６を凹に折り込むもので、複数（実施の形態では各主外側成形盤３０毎に３枚ずつの組が２組ある）設けられている。
この各第一谷部折り板４０は、図５及び図１６に示すように、ブランク１０における余エリア１４の谷部折れ線１６の該余エリア１４の外側辺から対角折れ線１５までの長さＬ1 ，Ｌ3 ，Ｌ5 に合わせて形成されており、図５に示すように、各第一谷部折り板４０はその他側縁側で第一ベース４１に取付けられている。この第一ベース４１は、主外側成形盤３０に谷部折れ線１６に当接する初期位置からこの第一谷部折り板４０が当接する谷部折れ線１６のピッチＰの縮む方向に移動可能にレール４２に支持されて設けられている。また、この第一ベース４１は、初期位置方向で谷部折れ線１６のピッチＰの縮みにより縮小可能な円錐コイルバネ型の第一スプリング４３で付勢されている。４４は第一スプリング４３がガイドされ第一ベース４１が移動可能に中間枠２２に設けられるガイドロッドである。
【００１８】
５０は第二谷部折り板であって、主外側成形盤３０に設けられ従外側成形盤３２によって起立させられる別の側壁３（ｂ）と余エリア１４の対角折れ線１５との間の谷部折れ線１６（図１６中Ｋ側）にその一側縁が当接しかつ谷部折れ線１６のピッチＰの縮みに追従して移動して谷部折れ線１６を凹に折り込むものであり、複数（実施の形態では各主外側成形盤３０毎に３枚ずつの組が２組ある）設けられている。
この各第二谷部折り板５０は、図５及び図１６に示すように、ブランク１０における余エリア１４の谷部折れ線１６の該余エリア１４の外側辺から対角折れ線１５までの長さＬ1 ，Ｌ3 ，Ｌ5 に合わせて形成されており、図５に示すように、各第二谷部折り板５０はその他側縁側で第二ベース５１に取付けられている。この第二ベース５１は、主外側成形盤３０に谷部折れ線１６に当接する初期位置からこの第二谷部折り板５０が当接する谷部折れ線１６のピッチＰの縮む方向に揺動可能に設けられている。５２は第二ベース５１の揺動支点、５３は揺動幅を規定し第二ベース５１の揺動をガイドするガイド溝である。また、この第二ベース５１は、初期位置方向に谷部折れ線１６のピッチＰの縮みにより縮小可能な環バネ型の第二スプリング５４で付勢されている。
また、第二谷部折り板５０は、図５及び図１２に示すように、第二ベース５１に対してヒンジ５５を介して傾動可能に軸支されかつ反傾動方向にバネ材（図示せず）で付勢して取付けられており、主外側成形盤３０が起立位置Ｙ1 ，Ｙ2 に至る過程で箱１に押されてこのバネ材の付勢力に抗して傾動し谷部４ａから脱出可能に構成されている。
【００１９】
６０は可撓性部材で形成された穴あきの第一山部折り板であって、基台２０の上部の上枠２１から垂下され折り畳まれるブランク１０の内側から主外側成形盤３０によって起立させられる側壁３（ａ）と余エリア１４の対角折れ線１５との間の山部折れ線１７（図１６中Ｊ側）にその両側縁が当接しかつ山部折れ線１７のピッチＰの縮みに追従して移動して山部折れ線１７を凸に折り込むものであり、複数（実施の形態では２枚ずつの組が左右に２組ある）設けられている。
この各第一山部折り板６０は、図１，図２及び図１６に示すように、ブランク１０における余エリア１４の山部折れ線１７の該余エリア１４の外側辺から対角折れ線１５までの長さＬ2 ，Ｌ4 に合わせて形成されており、図６に示すように、各第一山部折り板６０はその一端部が第一スライダ６１に取付けられている。この第一スライダ６１は、基台２０の上部の上枠２１に山部折れ線１７に当接する初期位置からこの第一山部折り板６０が当接する山部折れ線１７のピッチＰの縮む方向に移動可能にレール６２に支持されて設けられている。また、この第一スライダ６１は、初期位置方向で山部折れ線１７のピッチＰの縮みにより縮小可能な円錐コイルバネ型の第一バネ６３で付勢されている。６４は第一バネ６３がガイドされ第一スライダ６１が移動可能に上枠２１に設けられるガイドロッドである。
【００２０】
７０は可撓性部材で形成された第二山部折り板であって、従外側成形盤３２の先端部に立設された立設部材７１に設けられ、折り畳まれるブランク１０の内側から従外側成形盤３２によって起立させられる別の側壁３（ｂ）と余エリア１４の対角折れ線１５との間の山部折れ線１７（図１６中Ｋ側）にその両側縁が当接しかつこの山部折れ線１７のピッチＰの縮みに追従して移動して山部折れ線１７を凸に折り込むものであり、複数（実施の形態では２枚ずつの組が左右に２組ある）設けられている。
この各第二山部折り板７０は、図７及び図１６に示すように、ブランク１０における余エリア１４の山部折れ線１７の該余エリア１４の外側辺から対角折れ線１５までの長さＬ2 ，Ｌ4 に合わせて形成されており、図７に示すように、各第二山部折り板７０はその一端部が第二スライダ７２に取付けられている。この第二スライダ７２は、立設部材７１に山部折れ線１７に当接する初期位置からこの第二山部折り板７０が当接する山部折れ線１７のピッチＰの縮みに追従して移動可能にガイドロッド７３に支持されて設けられている。また、この第二スライダ７２は、初期位置方向で山部折れ線１７のピッチＰの縮みにより縮小可能な円錐コイルバネ型の第二バネ７４で付勢されている。第二バネ７４はガイドロッド７３にガイドされている。
【００２１】
７５は従外側成形盤３２の立設部材７１に設けられた押え板であって、第二山部折り板７０と平行に従外側成形盤３２に対して開閉可能に設けられ、図１，図２及び図７に示すように、開時にブランク１０の別の側壁３を従外側成形盤３２に支持することを許容し、図８に示すように、閉時にこの別の側壁３を従外側成形盤３２に対して押えるものである。押え板７５は、図７に示すように、立設部材７１に設けたエアシリンダ装置７６の駆動により開閉させられる。
８０は内側成形ブロック２６の下動時に内側成形ブロック２６及び折り畳まれたブランク１０が通過し通過時に側壁３を直立状態に成形する成形面８１を有した成形孔部である。この成形孔部８０は、図５に示すように、回動する一対の主外側成形盤３０及び一対の従外側成形盤３２の基端部で構成され、成形面８１が主外側成形盤３０及び従外側成形盤３２の回動軸を中心とする円弧面で形成されている。
図８に示すように、８３は中間枠２２に設けられブランク１０を平面状態で所定位置に位置決めする位置決めピンであり、エアシリンダ（図示せず）により主外側成形盤３０に出没可能に設けられ、ブランク１０の位置決め時に進出させられ、主外側成形盤３０及び従外側成形盤３２の作動時に没入させられる。また、この位置決めピン８３は、ブランク１０の大きさ（箱１の大きさ）に合わせて複数組設けられている。そのため、ブランク１０の大きさに合わせて位置決めピン８３を選択すれば、１つの装置で、大きさの異なる箱１を作成することができ、汎用性が向上させられる。
【００２２】
図２乃至図４に示すように、９０は成形孔部８０を通過した箱１を受けるボックス状の受け部、９１は受け部９０を基台２０の外部に移動させて箱１を排出する排出機構である。排出機構９１は、受け部９０を受取位置と基台２０外部の取出し位置との間に移動可能に支持するレール９２と、受け部９０を受取位置と取出し位置との間でリンク９３を介して移動させるエアシリンダ装置（図示せず）とを備えて構成されている。
【００２３】
従って、この実施の形態に係る箱の成形装置によって箱１を成形するときは、先ず、図１に示すように、主外側成形盤３０及び従外側成形盤３２の平面位置Ｘ1 ，Ｘ2 において、ブランク１０の大きさに対応した位置決めピン８３をエアシリンダにより進出させておくとともに、従外側成形盤３２の立設部材７１に設けられた押え板７５をエアシリンダ装置７６の駆動により開状態にし、この状態で、図８に示すように、ブランク１０を平面状態で、主外側成形盤３０及び従外側成形盤３２の上に載置する。この場合、ブランク１０は位置決めピン８３によって位置決めされるので、確実に所定位置に位置させられ、位置精度が向上させられる。
それから、図８に示すように、押え板７５をエアシリンダ装置７６の駆動により閉状態にし、ブランク１０の側壁３を従外側成形盤３２に対して押えてクランプする。そのため、位置ずれがなく、その後の成形が確実に行なわれる。
【００２４】
この状態から、図２及び図３に示すように、主外側成形盤３０を平面位置Ｘ1 から起立位置Ｙ1 に回動させる。これにより、図９に示すように、ブランク１０は、底壁折れ線１２及び側壁折れ線１３において、折曲させられて起立させられていくとともに、主外側成形盤３０の第一谷部折り板４０及び第二谷部折り板５０がブランク１０の谷部折れ線１６に当接し、この谷部折れ線１６が内側に凹になるように折曲させられていく。この場合、図９に示すように、谷部折れ線１６のピッチＰが徐々に縮んでいき、側壁３をクランプした従外側成形盤３２が引っ張られてわずかに回動していき、第一谷部折り板４０及び第二谷部折り板５０が谷部折れ線１６のピッチＰの縮み方向に力を受けるが、第一谷部折り板４０は第一スプリング４３の付勢力に抗して第一ベース４１が谷部折れ線１６のピッチＰの縮む方向に移動していくので、谷部折れ線１６のピッチＰの縮みに追従して移動し、また、第二谷部折り板５０は第二スプリング５４の付勢力に抗して第二ベース５１が谷部折れ線１６のピッチＰの縮む方向に揺動していくので、谷部折れ線１６のピッチＰの縮みに追従して移動していく。そのため、無理な力が作用することなく、円滑に谷部４ａの折り曲げが行なわれる。
【００２５】
そして、主外側成形盤３０が起立位置Ｙ1 に至る過程で、第一山部折り板６０及び第二山部折り板７０に山部折れ線１７が当接し、これにより、山部折れ線１７が外側に凸に折曲させられていく。この場合、図９に示すように、山部折れ線１７のピッチＰが徐々に縮んでいき、側壁３をクランプした従外側成形盤３２が引っ張られて回動していき、第一山部折り板６０及び第二山部折り板７０が山部折れ線１７のピッチＰの縮み方向に力を受けるが、第一山部折り板６０は第一バネ６３の付勢力に抗して第一スライダ６１が山部折れ線１７のピッチＰの縮む方向に移動していくので、山部折れ線１７のピッチＰの縮みに追従して移動し、また、第二山部折り板７０は第二バネ７４の付勢力に抗して第二スライダ７２が山部折れ線１７のピッチＰの縮む方向に移動していくので、山部折れ線１７のピッチＰの縮みに追従して移動していく。そのため、無理な力が作用することなく、円滑に山部４ｂの折り曲げが行なわれる。
【００２６】
次に、主外側成形盤３０が起立位置Ｙ1 に至るタイミングで、今度は、図１０に示すように、従外側成形盤３２を平面位置Ｘ2 から起立位置Ｙ2 に回動させる。これにより、図１１に示すように、ブランク１０は、押え板７５でクランプされた側壁３の底壁折れ線１２において、折曲させられて起立させられていく。また、これに伴って、主外側成形盤３０の第一谷部折り板４０及び及び第二谷部折り板５０の当接する谷部折れ線１６が更に折曲させられていく。この場合、谷部折れ線１６のピッチＰが更に縮んでいき、第一谷部折り板４０及び第二谷部折り板５０が谷部折れ線１６のピッチＰの縮み方向に更に力を受けるが、第一谷部折り板４０は第一スプリング４３の付勢力に抗して第一ベース４１が谷部折れ線１６のピッチＰの縮む方向に移動していくので、谷部折れ線１６のピッチＰの縮みに追従して移動し、また、第二谷部折り板５０は第二スプリング５４の付勢力に抗して第二ベース５１が谷部折れ線１６のピッチＰの縮む方向に揺動していくので、谷部折れ線１６のピッチＰの縮みに追従して移動していく。そのため、無理な力が作用することなく、円滑に谷部４ａの折り曲げが行なわれる。
更に、図１２に示すように、従外側成形盤３２の起立により、押え板７５でクランプされた側壁３が起立していくに従って第二谷部折り板５０が谷部折れ線１６のピッチＰの縮み方向に更に力を受けると、第二谷部折り板５０は、押されてバネ材の付勢力に抗して傾動し谷部４ａから脱出して行く。そのため、この点でも無理な力が作用することなく、円滑に谷部４ａの折り曲げが行なわれる。
【００２７】
また、第一山部折り板６０及び第二山部折り板７０の当接する山部折れ線１７においても、更に折曲させられていく。この場合、山部折れ線１７のピッチＰが更に縮んでいき、第一山部折り板６０及び第二山部折り板７０が山部折れ線１７のピッチＰの縮み方向に更に力を受けるが、第一山部折り板６０は第一バネ６３の付勢力に抗して第一スライダ６１が山部折れ線１７のピッチＰの縮む方向に移動していくので、山部折れ線１７のピッチＰの縮みに追従して移動し、また、第二山部折り板７０は第二バネ７４の付勢力に抗して第二スライダ７２が山部折れ線１７のピッチＰの縮む方向に移動していくので、山部折れ線１７のピッチＰの縮みに追従して移動していく。そのため、無理な力が作用することなく、円滑に山部４ｂの折り曲げが行なわれる。
更にまた、第一山部折り板６０及び第二山部折り板７０が山部折れ線１７のピッチＰの縮み方向に更に力を受けても、図１０に示すように、第一山部折り板６０及び第二山部折り板７０は可撓性部材で形成されているので、撓んで曲がることから、この点でも無理な力が作用することなく、円滑に山部４ｂの折り曲げが行なわれる。
【００２８】
そして、最後に、図１３に示すように、内側成形ブロック２６を、エアシリンダ装置２７の駆動により、定常位置から進出させて、箱１を中間枠２２の下方に押し出す。これにより、折り畳まれたブランク１０が成形孔部８０を通過し、内側成形ブロック２６及び成形孔部８０の成形面によって、側壁３が直立状態に折曲され、谷部４ａ及び山部４ｂが確実に折曲され、図１４に示すように、箱１が成形される。
この箱１は、図１３に示すように、受け部９０に収納される。この状態で、内側成形ブロック２６は、エアシリンダ装置２７の駆動により、定常位置に復帰させられる。そして、箱１を受けた受け部９０は排出機構９１によって、図３に示すように、受取位置から取出し位置に移動させられ、箱１が手動あるいは自動で取出される。それから、受け部９０は排出機構９１によって、取出し位置から受取位置に復帰させられる。また、主外側成形盤３０及び従外側成形盤３２も起立位置Ｙ1 ，Ｙ2 から平面位置Ｘ1 ，Ｘ2 に復帰させられる。このようにして、箱１が成形されていく。
この場合、自動で箱１が成形されるので、従来手作業で成形した場合に比較して、製造時間が大幅に短縮され、製造効率が向上させられる。
【００２９】
尚、上記実施の形態で、第一谷部折り板４０，第二谷部折り板５０，第一山部折り板６０，第二山部折り板７０の数は、上記の数に限定されるものではなく、蛇腹部４の折り線に合わせて適宜設けて良い。また、上記実施の形態においては、駆動方式としてエアシリンダ装置を設けているが、必ずしもこれに限定されるものではなく、例えば、ボールネジを使った電動のサーボ駆動方式，油圧駆動方式等どのような駆動方式を用いても良く適宜変更して差支えない。
【００３０】
【発明の効果】
以上説明したように、本発明の箱の成形装置によれば、主外側成形盤及び従外側成形盤を回動させれば、ブランクを折れ線に沿って折り畳んで四角筒状に成形することができ、特に、谷部折り板及び山部折り板が各折り板を折れ線のピッチの縮みに追従して谷部及び山部を交互に折り畳んで蛇腹部を成形するので、無理な力が作用することなく、円滑に折り曲げを行ないながら、極めて簡単に箱を成形することができる。即ち、本発明は複雑な折り込みに対応できる機械化を実現して自動化を図り、大量生産を容易にすることができる。
そして、内側成形ブロックを上下動可能に設けて、内側成形ブロックの下動時に成形孔部で側壁を直立状態に成形するように構成した場合には、折り畳みをしっかりと確実にすることができ、箱の姿を確実にすることができる。
【００３１】
また、第一谷部折り板，第二谷部折り板，第一山部折り板，第二山部折り板により各折り板を折れ線のピッチの縮みに追従させて谷部及び山部を折り畳んで蛇腹部を成形する場合には、折られる側壁の移動方向によるブランク各部の条件に応じた折り畳みをすることができ、それだけ、無理な力が作用することなく、円滑に折り曲げを行なうことができ、より一層折り畳みをしっかりと確実にすることができ、箱の姿を確実にすることができる。
更に、内側成形ブロックの下動時に側壁を直立状態に成形する成形孔部を一対の主外側成形盤及び一対の従外側成形盤の基端部で構成した場合には、外側成形盤を利用しているので、別途型を設けることなく構造を簡略化できる。
更にまた、各第一谷部折り板を谷部折れ線のピッチの縮む方向に移動可能かつ第一スプリングで初期位置方向に付勢される第一ベースに設け、各第二谷部折り板を谷部折れ線のピッチの縮む方向に移動可能かつ第二スプリングで初期位置方向に付勢される第二ベースに設けた場合には、スプリングの付勢力を適宜に定めて、第一谷部折り板及び第二谷部折り板を移動させることができるので、側壁の移動による各部の条件に応じた折り畳みをすることができ、より一層折り畳みを確実にすることができる。
また、第二谷部折り板を、第二ベースに対して傾動可能にかつ反傾動方向にバネ材で付勢して取付け、主外側成形盤が起立位置に至る過程で箱に押されてバネ材の付勢力に抗して傾動し谷部から脱出可能に構成した場合には、無理な力が作用することなく、円滑に谷部の折り曲げを行なうことができる。
【００３２】
更に、各第一山部折り板を山部折れ線のピッチの縮む方向に移動可能かつ第一バネで初期位置方向に付勢される第一スライダに取付け、各第二山部折り板を山部折れ線のピッチの縮む方向に移動可能かつ第二バネで初期位置方向に付勢される第二スライダに取付けた場合には、スプリングの付勢力を適宜に定めて、第一山部折り板及び第二山部折り板を移動させることができるので、側壁の移動による各部の条件に応じた折り畳みをすることができ、より一層折り畳みを確実にすることができる。
更にまた、各第一山部折り板及び第二山部折り板を、可撓性部材で形成した場合には、山部折れ線のピッチの縮み方向に更に力を受けても、撓んで曲がることから、無理な力が作用することなく、円滑に谷部の折り曲げを行なうことができる。
また、従外側成形盤の立設部材に、ブランクの側壁を従外側成形盤に対して押える押え板を備えた場合には、位置ずれが防止され、成形を確実に行なうことができる。
【００３３】
更に、ブランクを平面状態で所定位置に位置決めする複数の位置決めピンを出没可能に設けた場合には、位置決めを確実に行なうことができ、成形を確実に行なうことができる。
この場合、位置決めピンの組を、ブランクの大きさに合わせて複数組設ければ、１つの装置で大きさの異なる箱を作成することができ、汎用性を向上させることができる。
また、成形孔部を通過した箱を受ける受け部と、受け部を基台の外部に移動させて箱を排出する排出機構とを設けた場合には、自動的に製品を排出することができ、それだけ、製造効率を向上させることができる。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る箱の成形装置を示す斜視図である。
【図２】本発明の実施の形態に係る箱の成形装置を示す正面図である。
【図３】本発明の実施の形態に係る箱の成形装置を示す側面図である。
【図４】本発明の実施の形態に係る箱の成形装置を示す平面図である。
【図５】本発明の実施の形態に係る箱の成形装置において主外側成形盤の第一谷部折り板及び第二谷部折り板の取付状態を示す斜視図である。
【図６】本発明の実施の形態に係る箱の成形装置の第一山部折り板の取付状態を示す斜視図である。
【図７】本発明の実施の形態に係る箱の成形装置の従外側成形盤の第二山部折り板の取付状態を示す斜視図である。
【図８】本発明の実施の形態に係る箱の成形装置により箱を成形する工程において、ブランクを支持した状態を示す斜視図である。
【図９】本発明の実施の形態に係る箱の成形装置により箱を成形する工程において、ブランクの折曲状態を示す斜視図である。
【図１０】本発明の実施の形態に係る箱の成形装置により箱を成形する工程において、従外側成形盤の起立位置での状態を示す正面図である。
【図１１】本発明の実施の形態に係る箱の成形装置により箱を成形する工程において、従外側成形盤の起立位置でのブランクの折曲状態を示す拡大斜視図である。
【図１２】本発明の実施の形態に係る箱の成形装置により箱を成形する工程において、従外側成形盤の起立位置での主外側成形盤の第一谷部折り板及び第二谷部折り板の状態を示す平面図である。
【図１３】本発明の実施の形態に係る箱の成形装置により箱を成形する工程において、内側成形ブロックを下降させた状態を示す正面図である。
【図１４】本発明の実施の形態に係る箱の成形装置が成形する箱の一例を示す斜視図である。
【図１５】本発明の実施の形態に係る箱の成形装置が成形する箱の一例を半展開状態で示す斜視図である。
【図１６】本発明の実施の形態に係る箱の成形装置が成形する箱のブランクの一例を展開状態で示す平面図である。
【符号の説明】
１箱
２底壁
３側壁
４蛇腹部
５蓋
１０ブランク
１１コーナ部
１２底壁折れ線
１３側壁折れ線
１４余エリア
Ｐ1 ，Ｐ2 コーナ点
１５対角折れ線
Ｐピッチ
１６谷部折れ線
１７山部折れ線
２０基台
２１上枠
２２中間枠
２３下枠
２４支柱
２５補強枠
２６内側成形ブロック
２７エアシリンダ装置
３０主外側成形盤
３１エアシリンダ
Ｘ1 平面位置
Ｙ1 起立位置
３２従外側成形盤
Ｘ2 平面位置
Ｙ2 起立位置
４０第一谷部折り板
４１第一ベース
４３第一スプリング
５０第二谷部折り板
５１第二ベース
５４第二スプリング
５５ヒンジ
６０第一山部折り板
６１第一スライダ
６３第一バネ
７０第二山部折り板
７１立設部材
７２第二スライダ
７４第二バネ
７５押え板
８０成形孔部
８３位置決めピン
９０受け部
９１排出機構[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is formed by folding a single sheet-like blank into a square tube and having a bellows portion between side walls, and acts as a cushion when accommodating a fragile object such as a wine bottle. The present invention relates to a box forming device that can be made to work.
[0002]
[Prior art]
In recent years, a box 1 as shown in FIGS. 14 to 16 has been developed. The box 1 includes a rectangular bottom wall 2, four rectangular side walls 3 continuous with the bottom wall 2, and a bellows portion 4 formed between adjacent side walls 3 and having valleys 4 a and peaks 4 b alternately continuous. It is configured. Reference numeral 5 denotes a lid that fits into and closes the opening 1a of the box 1.
As shown in FIG. 16, the box 1 has a square paper sheet-like blank 10 in which a corner portion 11 of the blank 10 is cut out in a rectangular shape, and a rectangular bottom wall 2 is defined by a bottom wall broken line 12 in the center of the blank 10. The four rectangular side walls 3 which are continuous with the bottom wall broken lines 12 of the bottom wall 2 are divided by the bottom wall broken lines 12 and the side wall broken lines 13, and the bellows portions 4 are formed between the side wall broken lines 13 of the side walls 3. A diagonal polygonal line 15 is formed in the surplus area 14 connecting the corner point P1 of the blank 10 and the corner point P2 of the bottom wall 2, and the extra area 14 has an outer side extending from each outer side to the diagonal polygonal line 15. The valley fold lines 16 and the ridge fold lines 17 which are inwardly concave at a predetermined pitch P are alternately provided in parallel with the side wall fold lines 13 of FIG. 1, and as shown in FIG. Fold along the figure As shown in FIG. 14, it is formed in a square tubular shape.
Conventionally, the box 1 is formed by forming a broken line in the blank 10 in advance using a press machine or the like so that the blank 10 can be easily bent, and manually bending the blank 10 on which the broken line is formed. Was.
According to the box 1, since one blank 10 is used almost as it is, there is no waste, and the box 1 can be manufactured without performing a complicated operation such as cutting or gluing. When used for accommodating a fragile object such as a wine bottle, for example, the bellows portion 4 acts as a cushion, making it hard to break and can be transported, and has an advantage that the design is novel and interesting. There is.
[0003]
[Problems to be solved by the invention]
By the way, conventionally, this box 1 is folded and formed by hand because the folding is complicated, so that there is a problem that mass production is difficult. In addition, since mechanization is complicated in folding, it is difficult to imagine how to mechanize, and it has not been realized.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a box forming apparatus which realizes automation which can cope with complicated folding, achieves automation, and facilitates mass production. And
[0004]
[Means for Solving the Problems]
In order to achieve such an object, a box forming apparatus according to the present invention is configured such that a sheet-like blank is folded along a folding line to form a rectangular tube, and has a rectangular bottom wall, and a rectangular bottom wall continuous with the bottom wall. A box forming apparatus having a bellows portion formed between two side walls and adjacent side walls and having a valley portion and a peak portion alternately continuous, a column-shaped inner forming block provided on a base and forming the inside of the box, A pair of side walls of the blank, which are rotatably provided on the base, and the opposing areas on both sides of the side walls, which constitute the bellows portion, are bent from the outside of the blank to be folded along a folding line to stand. A pair of main outer forming plates, and a pair of other side walls which are rotatably provided on the base and which stand by bending a pair of opposite side walls of the blank along the folding line from outside of the folded blank. A plurality of valley fold plates which are provided on the main outer forming board, abut against the fold lines of the surplus area, and follow the contraction of the pitch of the fold lines to move and fold the fold lines into recesses; It is provided to be suspended from the upper portion of the base and is provided on the sub-outside forming plate and abuts on the folding line of the surplus area from the inside of the blank to be folded and moves following the contraction of the pitch of the folding line. And a plurality of mountain-folded plates for folding the bent line into a convex shape.
[0005]
When a box is formed by the box forming apparatus, first, a blank is placed on the main outer forming plate and the sub outer forming plate at the plane positions of the main outer forming plate and the sub outer forming plate.
Next, the main outer forming plate is rotated from the plane position to the upright position. With this, the pair of opposing side walls of the blank and the surplus area that constitutes the bellows on both sides of the side wall are bent and erected at the folding line, and the valley fold plate of the main outer forming plate is raised. The blank comes into contact with the valley line, and the valley line is bent so as to be concave inward. In this case, the valley folding line pitch gradually shrinks and the valley folding plate receives force, but the valley folding plate moves following the reduction of the folding line pitch, so that an excessive force acts. And the valleys are smoothly bent.
Also, in the process of the main outer forming plate reaching the upright position, the crest line is in contact with the crest plate, whereby the crease line is bent outwardly. In this case, the pitch of the fold line is gradually reduced, and the fold plate receives a force. However, since the fold plate moves in the direction in which the pitch of the fold line decreases, an excessive force acts. And the ridges are smoothly bent.
Next, the slave outer molding machine is rotated from the planar position to the upright position. As a result, another side wall is bent and erected along the broken line. Along with this, the valley fold line that the valley fold plate of the main outer forming board contacts is further bent. In this case, the pitch of the polygonal line is further reduced, and the valley fold plate is further subjected to a force in the direction of reduction of the pitch of the polygonal line, but moves following the reduction of the pitch, so that no excessive force is applied. The valley is smoothly bent.
In this way, a box is formed. That is, if the main outer forming machine and the sub outer forming machine are rotated, the blank can be folded along the broken line and formed into a rectangular tube shape, and the box can be formed very easily, and the complicated folding can be performed. It is possible to realize automation that realizes mechanization that can cope with mass production and facilitate mass production of boxes.
[0006]
If necessary, the inner forming block is provided on the base so as to be movable up and down, and the inner forming block and the folded blank pass when the inner forming block moves down, and the side wall is formed in an upright state when passing. A configuration is provided in which a molding hole having a molding surface is provided.
By this, when the inner forming block is pushed downward, the folded blank passes through the forming hole, and the side wall is bent upright by the inner forming block and the forming hole, so that the valleys and the peaks are reliably formed. And a box is formed.
[0007]
More specifically, the box forming apparatus of the present invention comprises a rectangular bottom wall, four rectangular side walls connected to the bottom wall, and a bellows formed between adjacent side walls and having valleys and peaks alternately continuing. Wherein a rectangular bottom wall is defined by a bottom wall broken line at the center of a substantially rectangular sheet-shaped blank, and four rectangular side walls connected to each bottom wall broken line of the bottom wall are formed by the bottom wall broken line. And a diagonal polygonal line connecting the corner point of the blank and the corner point of the bottom wall is formed in an extra area formed between the polygonal line of the side wall and forming the bellows portion. From the outer side to the diagonal line in the area, alternately provide a valley line and an outwardly convex ridge line parallel to the side wall line on the side where the outer side is located and concave at a predetermined pitch. The blank is folded along the broken line to form a square tube. In the molding apparatus of the box,
A column-shaped inner forming block having a bottom surface facing the inner surface of the bottom wall of the blank to be folded and four side surfaces facing the inner surface of the side wall to form the inside of the box; The pair of movably provided side walls of the blank and a plane position respectively supporting the remaining areas on both sides of the side walls in a planar manner, and the pair of side walls and the opposite sides of the pair of side walls which are rotated to rotate. A pair of main and outer molding machines which press the surplus area and bend along the bottom wall broken line and the side wall broken line, respectively, and are moved from the plane position to two standing positions where the side walls stand up along the inner forming block. A plane position for supporting a pair of other side walls of the blank that are rotatably provided on the base and opposing each other in a plane, and a bottom wall broken line that is rotated to press the other side walls. A pair of secondary outer forming disks which are bent along and moved to two standing positions to be raised from the planar position, and a pair of side walls and extra areas provided on the main outer forming disk and raised by the main outer forming disk. A plurality of first valley fold plates, one side edge of which abuts on the valley broken line between the square bent line and moves following the contraction of the pitch of the valley broken line and folds the valley broken line into a concave, One edge of the valley fold line abuts a valley fold line between another side wall provided on the main outer forming machine and erected by the sub outer mold machine and a diagonal fold line of the surplus area, and the pitch of the valley fold line shrinks. A plurality of second valley fold plates that move to follow the fold and fold the valley fold line into a concave shape, and side walls that are suspended from an upper portion of the base and are erected by the main outer forming plate from the inside of the folded blank. And diagonal of extra area A plurality of first mountain fold plates that abut both side edges thereof against the fold line between the ridge lines and move following the contraction of the pitch of the fold line of the ridge to move the fold line into a convex shape, A mountain between another side wall which is provided on an upright member erected at the tip end of the subordinate outer forming machine and is erected by the subordinate forming machine from the inside of the folded blank and a diagonal polygonal line of the surplus area. A plurality of second fold plates are provided in which both side edges of the fold line are in contact with each other and move following the contraction of the pitch of the fold line to fold the fold line into a convex shape.
[0008]
Accordingly, in addition to the above-described operation, the first valley folded plate, the second valley folded plate, the first peak folded plate, and the second peak folded plate cause each folded plate to follow the contraction of the pitch of the folding line. Since the valleys and peaks are folded to form the bellows, the blanks can be folded according to the conditions of each part of the blank depending on the moving direction of the side wall to be folded. The folding can be performed, the folding can be more firmly secured, and the shape of the box can be secured.
Also, if necessary, the inner forming block is provided on the base so as to be vertically movable, and when the inner forming block is moved down, the inner forming block and the folded blank pass and the side wall is formed upright when passing. A molding hole having a molding surface to be formed is provided, and the molding hole is configured by the base end portions of the pair of rotating main outer forming disks and the pair of subsidiary outer forming disks. Since the forming hole is provided using the outer forming board, the structure can be simplified without providing a separate mold.
[0009]
Further, if necessary, the first valley folded plate and the second valley folded plate are formed in accordance with the length from the outer side of the surplus area of the surplus area fold line to the diagonal fold line. The first valley folded plate is attached to the first base at the other side edge side, and the first valley folded plate is attached to the main outer forming plate from an initial position where the first valley folded plate abuts on the valley fold line. The first base is movably provided in a direction in which the pitch of the abutting valley bent line is reduced, and the first base is urged in the initial position direction by a first spring that can be reduced by the reduction of the pitch of the valley broken line. The valley fold plate is attached to the second base at the other side edge, and the second base is attached to the main outer forming plate from an initial position where the valley fold plate abuts on the valley fold line. The second base is swingably provided in the direction in which the pitch is reduced, and It has a configuration which is urged by a second spring that can be reduced by the shrinkage of the pitch of the valleys polygonal line direction. Since the biasing force of the spring is appropriately determined and the first valley folded plate and the second valley folded plate can be moved, the folding can be performed according to the conditions of each part due to the movement of the side wall. Folding can be ensured.
[0010]
Further, if necessary, the second valley portion folded plate is attached by being biased by a spring material in a direction in which the second valley portion folded plate can be tilted with respect to the second base in a counter-tilting direction, and the main outer forming plate reaches the upright position. , And is tilted against the urging force of the spring material to be able to escape from the trough. The valley can be smoothly bent without applying excessive force.
Furthermore, each of the first mountain fold plate and the second mountain fold plate is formed in accordance with the length from the outer side of the surplus area of the surplus area fold line to the diagonal fold line of the surplus area, Each of the first crest folded plates is attached to the first slider at one end thereof, and the first slider abuts on the top of the base from the initial position where the first crest folded plate abuts on the crest folding line. The first slider is biased by a first spring that can be reduced in the direction of the initial position by contracting the pitch of the crest line, and the first slider is urged by the first spring. A plate is attached to the second slider at one end thereof, and the second slider comes into contact with the upstanding member of the subordinate outer forming plate from the initial position where the second slider comes into contact with the bent line of the ridge. Movably provided following the contraction of the pitch of It is a biased with the structures in a collapsible second spring by contraction in the period positional direction of the pitch of the crest fold line. The biasing force of the spring is appropriately determined, and the first and second fold plates can be moved, so that the folding can be performed according to the conditions of each unit due to the movement of the side wall. Folding can be ensured.
[0011]
Further, if necessary, each of the first and second crests may be formed of a flexible member. Even if a force is further applied in the direction in which the pitch of the crest line is reduced, the valley can be smoothly bent without exerting an excessive force since it bends and bends.
Further, if necessary, the standing member of the subordinate outer forming plate is provided so as to be openable and closable with respect to the subordinate outer forming plate in parallel with the second ridge folded plate, and opens another side wall of the blank when opened. It is configured to include a holding plate that is allowed to be supported by the slave outer forming plate and presses the other side wall against the slave outer forming plate when closed. Displacement is prevented, and molding can be performed reliably.
[0012]
Furthermore, as necessary, a plurality of positioning pins for positioning the blank at a predetermined position in a planar state are provided on the base so as to be able to protrude and retract. Positioning can be performed reliably, and molding can be performed reliably.
Further, if necessary, a plurality of sets of the positioning pins are provided according to the size of the blank. Boxes of different sizes can be created with one device, and versatility can be improved.
Further, if necessary, a receiving portion for receiving the box passing through the forming hole and a discharging mechanism for discharging the box by moving the receiving portion to the outside of the base are provided. The product can be automatically discharged, and the production efficiency can be improved accordingly.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a box forming apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
The box forming apparatus according to the embodiment of the present invention shown in FIGS. 1 to 7 is for forming the box 1 shown in FIGS. 14 to 16 as described above. The box 1 includes a rectangular bottom wall 2, four rectangular side walls 3 continuous with the bottom wall 2, and a bellows portion 4 formed between adjacent side walls 3 and having valleys 4 a and peaks 4 b alternately continuous. It is configured. Reference numeral 5 denotes a lid that fits into and closes the opening 1a of the box 1.
As shown in FIG. 16, the box 1 has a square paper sheet-like blank 10 in which a corner portion 11 of the blank 10 is cut out in a rectangular shape, and a rectangular bottom wall 2 is defined by a bottom wall broken line 12 in the center of the blank 10. The four rectangular side walls 3 which are continuous with the bottom wall broken lines 12 of the bottom wall 2 are divided by the bottom wall broken lines 12 and the side wall broken lines 13, and the bellows portions 4 are formed between the side wall broken lines 13 of the side walls 3. A diagonal polygonal line 15 is formed in the surplus area 14 connecting the corner point P1 of the blank 10 and the corner point P2 of the bottom wall 2, and the extra area 14 has an outer side extending from each outer side to the diagonal polygonal line 15. Valley polygonal lines 16 (three in each figure (including a line in which corner 11 is cut out in a rectangular shape) for each extra area 14) and convex outwardly, which are parallel to side wall polygonal lines 13 and concave inward at a predetermined pitch P. Bend line 17 (in the figure, 15 are alternately provided, and as shown in FIG. 15, the blank 10 is folded along each broken line to form a square tube as shown in FIG.
[0014]
In the box forming apparatus according to the embodiment of the present invention, reference numeral 20 denotes a base, which is configured by supporting an upper frame 21, an intermediate frame 22, and a lower frame 23 with columns at intervals. Reference numeral 25 denotes a reinforcing frame provided below the lower frame 23.
26 forms the inside of the box 1 having a bottom surface 26a facing the inner surface of the bottom wall 2 and four side surfaces 26b facing the inner surface of the side wall 3 of the blank 10 provided on the upper frame 21 of the base 20 to be folded. It is a column-shaped inner forming block. The inner forming block 26 is provided on the base 20 so as to be vertically movable. More specifically, the inner molding block 26 is attached to a piston of an air cylinder device 27 provided on the upper frame 21 via a connecting rod 28, and is driven by the air cylinder device 27 to be at a steady position when the piston is retracted. At the time of advance, the box 1 is pushed below the intermediate frame 22.
[0015]
Numeral 30 denotes a pair of main outer forming discs, which are rotatably provided on the intermediate frame 22 of the base 20 and form a pair of opposing side walls 3 of the blank 10 and extra areas 14 on both sides of the side walls 3 in a plane shape, respectively. The supporting plane position X1 and the pair of turned side walls 3 facing each other and the surplus area 14 on both sides of the side wall 3 are pressed and bent along the bottom wall broken line 12 and the side wall broken line 13, respectively. The side wall 3 is moved to two positions of an upright position Y1 in which the side wall 3 stands up at a substantially right angle along the inner forming block 26. Reference numeral 31 denotes a plurality of air cylinders for moving the main outer forming plate 30 to two positions of a plane position X1 and an upright position Y1, and is provided between the main outer forming plate 30 and the lower frame 23.
[0016]
Reference numeral 32 denotes a pair of secondary outer forming disks, which are rotatably provided on the intermediate frame 22 of the base 20 and have a plane position X2 and a turn which respectively support a pair of opposite side walls 3 of the blank 10 in a plane. When moved, the other side wall 3 is pressed and bent along the bottom wall broken line 12 to be moved to the upright position Y2 which rises from the plane position X2. The angle of the upright position Y2 is about 45 ° (see FIG. 10) in the embodiment. Reference numeral 33 denotes an air cylinder for moving the slave outer forming plate 32 to two positions, a plane position X2 and a standing position Y2, and is provided between the slave outer forming plate 32 and the lower frame 23. The air cylinder 33 of the sub outer forming plate 32 operates after the air cylinder 31 of the main outer forming plate 30 operates.
[0017]
Reference numeral 40 denotes a first valley folded plate, which is provided on the main outer forming platen 30 and is cut between the side wall 3 (a) raised by the main outer forming plate 30 and the diagonal broken line 15 of the surplus area 14. 16 (J side in FIG. 16), one edge of which abuts and moves following the contraction of the pitch P of the valley broken line 16 to fold the valley broken line 16 into a concave shape. There are two sets of three for each main outer forming plate 30).
As shown in FIGS. 5 and 16, each of the first valley folded plates 40 has a length L1 from the outer side of the surplus area 14 of the valley fold line 16 of the extra area 14 of the blank 10 to the diagonal fold line 15. , L3, L5, and each first valley folded plate 40 is attached to the first base 41 at the other side edge as shown in FIG. The first base 41 is a rail 42 that is movable from the initial position where the main outer forming plate 30 abuts the valley fold line 16 in the direction in which the pitch P of the valley fold line 16 that the first valley fold plate 40 abuts contracts. It is supported and provided. The first base 41 is urged by a conical coil spring-type first spring 43 that can be reduced by the contraction of the pitch P of the valley bent line 16 in the initial position direction. Reference numeral 44 denotes a guide rod provided on the intermediate frame 22 such that the first spring 43 is guided and the first base 41 is movable.
[0018]
Reference numeral 50 denotes a second valley folded plate, which is a valley between another side wall 3 (b) provided on the main outer forming plate 30 and raised by the sub outer forming plate 32 and a diagonal fold line 15 of the surplus area 14. One edge of the broken line 16 (K side in FIG. 16) abuts and moves following the contraction of the pitch P of the broken line 16 to fold the broken line 16 into a concave shape. In the embodiment, there are two sets of three sheets for each main outer forming plate 30).
As shown in FIGS. 5 and 16, each of the second valley folded plates 50 has a length L1 from the outer side of the valley bent line 16 of the surplus area 14 of the blank 10 to the diagonal bent line 15. , L3, L5, and each second valley folded plate 50 is attached to the second base 51 at the other side edge as shown in FIG. The second base 51 is provided on the main outer forming board 30 so as to swing from an initial position where the second valley folded plate 50 abuts on the main outer forming board 30 in a direction in which the pitch P of the valley folded line 16 abuts on. Have been. 52 is a swing fulcrum of the second base 51, and 53 is a guide groove for defining the swing width and guiding the swing of the second base 51. Further, the second base 51 is urged by a ring spring type second spring 54 which can be reduced in the initial position direction by the contraction of the pitch P of the valley bent line 16.
As shown in FIGS. 5 and 12, the second valley folded plate 50 is pivotally supported on the second base 51 via a hinge 55 so as to be tiltable, and a spring member (not shown) is provided in the anti-tilt direction. ), The main outer forming platen 30 is pushed by the box 1 in the process of reaching the standing positions Y1 and Y2, and tilts against the urging force of the spring material to escape from the valley portion 4a. Is configured.
[0019]
Reference numeral 60 denotes a perforated first mountain fold plate formed of a flexible member, which is erected from the inside of the blank 10 which is suspended from the upper frame 21 of the base 20 and folded by the main outer forming plate 30. Both side edges abut a ridge broken line 17 (the J side in FIG. 16) between the side wall 3 (a) and the diagonal fold line 15 of the surplus area 14, and follow the contraction of the pitch P of the ridge broken line 17. It moves and folds the mountain line broken line 17 in a convex manner, and a plurality of (two pairs of two in the embodiment are provided on the left and right in the embodiment) are provided.
As shown in FIGS. 1, 2, and 16, each first mountain fold plate 60 extends from the outer side of the surplus area 14 of the surplus area 14 of the surplus area 14 of the blank 10 to the diagonal fold line 15. As shown in FIG. 6, one end of each first crest folded plate 60 is attached to the first slider 61. As shown in FIG. The first slider 61 moves from the initial position where the upper frame 21 abuts on the upper frame 21 of the base 20 to the direction in which the pitch P of the crest line 17 where the first crest plate 60 abuts contracts. It is provided to be supported by the rail 62 as much as possible. The first slider 61 is urged by a conical coil spring type first spring 63 which can be reduced in the initial position direction by reducing the pitch P of the crease 17. Reference numeral 64 denotes a guide rod provided on the upper frame 21 such that the first spring 63 is guided and the first slider 61 is movable.
[0020]
Reference numeral 70 denotes a second mountain-folded plate formed of a flexible member, which is provided on an upright member 71 erected at the distal end of the sub-outside forming plate 32, from the inside of the folded blank 10 to the sub-outside. Both side edges abut on a mountain line 17 (K side in FIG. 16) between another side wall 3 (b) raised by the forming board 32 and the diagonal line 15 of the surplus area 14, and this mountain line is 17 are moved following the contraction of the pitch P of 17 to fold the crease line 17 into a convex shape. In the embodiment, a plurality of sets (two sets of two sheets are provided on the left and right sides) are provided.
As shown in FIGS. 7 and 16, each of the second crest folded plates 70 has a length L2 from the outer side of the crease 17 of the crest 17 of the surplus area 14 of the blank 10 to the diagonal crease 15. , L4, and as shown in FIG. 7, one end of each second mountain-folded plate 70 is attached to the second slider 72. The second slider 72 is movably guided from the initial position where the standing member 71 comes into contact with the crest line 17 so as to follow the contraction of the pitch P of the crease line 17 where the second folded plate 70 abuts. It is provided to be supported by a rod 73. Further, the second slider 72 is urged by a conical coil spring type second spring 74 which can be reduced in the initial position direction by the contraction of the pitch P of the crease 17. The second spring 74 is guided by the guide rod 73.
[0021]
Reference numeral 75 denotes a pressing plate provided on the standing member 71 of the sub-outside forming plate 32, which is provided so as to be openable and closable with respect to the sub-outside forming plate 32 in parallel with the second mountain portion folded plate 70. As shown in FIG. 2 and FIG. 7, the other side wall 3 of the blank 10 is allowed to be supported on the sub-outside molding plate 32 when opened, and as shown in FIG. It is pressed against the board 32. As shown in FIG. 7, the presser plate 75 is opened and closed by driving an air cylinder device 76 provided on the standing member 71.
Reference numeral 80 denotes a forming hole having a forming surface 81 for forming the side wall 3 upright when the inner forming block 26 and the folded blank 10 pass through when the inner forming block 26 moves down. As shown in FIG. 5, the forming holes 80 are formed by the base end portions of a pair of rotating main outer forming disks 30 and a pair of subsidiary outer forming disks 32, and the forming surface 81 is formed by the main outer forming disks 30 and It is formed by an arc surface centered on the rotation axis of the sub outer forming plate 32.
As shown in FIG. 8, reference numeral 83 denotes a positioning pin provided on the intermediate frame 22 for positioning the blank 10 at a predetermined position in a planar state, and is provided so as to be able to protrude and retract from the main outer forming board 30 by an air cylinder (not shown). , And is advanced when the blank 10 is positioned, and is immersed when the main outer forming plate 30 and the sub outer forming plate 32 are operated. Further, a plurality of sets of the positioning pins 83 are provided in accordance with the size of the blank 10 (the size of the box 1). Therefore, if the positioning pins 83 are selected according to the size of the blank 10, boxes 1 having different sizes can be created with one device, and the versatility is improved.
[0022]
As shown in FIGS. 2 to 4, 90 is a box-shaped receiving portion for receiving the box 1 having passed through the forming hole 80, and 91 is a discharge for moving the receiving portion 90 to the outside of the base 20 and discharging the box 1. Mechanism. The discharging mechanism 91 supports a rail 92 movably supporting the receiving portion 90 between a receiving position and an unloading position outside the base 20, and connects the receiving portion 90 between the receiving position and the unloading position via a link 93. And a moving air cylinder device (not shown).
[0023]
Therefore, when the box 1 is formed by the box forming apparatus according to the present embodiment, first, as shown in FIG. 1, the blanks are placed at the plane positions X1, X2 of the main outer forming plate 30 and the sub outer forming plate 32. The positioning pin 83 corresponding to the size of 10 is advanced by an air cylinder, and the pressing plate 75 provided on the standing member 71 of the sub outer forming plate 32 is opened by driving the air cylinder device 76. In this state, as shown in FIG. 8, the blank 10 is placed on the main outer forming plate 30 and the sub outer forming plate 32 in a planar state. In this case, since the blank 10 is positioned by the positioning pins 83, it is reliably positioned at a predetermined position, and the positional accuracy is improved.
Then, as shown in FIG. 8, the holding plate 75 is closed by driving the air cylinder device 76, and the side wall 3 of the blank 10 is pressed against the sub outer forming plate 32 and clamped. Therefore, there is no displacement, and the subsequent molding is performed reliably.
[0024]
From this state, as shown in FIGS. 2 and 3, the main outer forming platen 30 is rotated from the plane position X1 to the upright position Y1. Thereby, as shown in FIG. 9, the blank 10 is bent and erected at the bottom wall broken line 12 and the side wall broken line 13, and the first valley folded plate 40 of the main outer forming plate 30 and The second valley fold plate 50 abuts on the valley fold line 16 of the blank 10 and is bent so that the valley fold line 16 becomes concave inward. In this case, as shown in FIG. 9, the pitch P of the valley bent line 16 is gradually reduced, and the sub outer forming plate 32 which clamps the side wall 3 is pulled and slightly rotated, and the first valley is formed. The fold plate 40 and the second valley fold plate 50 receive a force in the contraction direction of the pitch P of the valley fold lines 16, but the first valley fold plate 40 resists the urging force of the first spring 43, Since 41 moves in the direction in which the pitch P of the valley bent line 16 is reduced, it moves following the reduction in the pitch P of the valley broken line 16, and the second valley folded plate 50 is moved by the second spring 54. Since the second base 51 swings in the direction in which the pitch P of the valley broken line 16 is reduced against the urging force, the second base 51 moves following the reduction in the pitch P of the valley broken line 16. Therefore, the valley 4a is smoothly bent without exerting an excessive force.
[0025]
Then, in the process in which the main outer forming platen 30 reaches the upright position Y1, the crest broken line 17 abuts on the first crest folded plate 60 and the second crest folded plate 70, whereby the crest broken line 17 is moved outward. It is bent to be convex. In this case, as shown in FIG. 9, the pitch P of the ridge bent line 17 is gradually reduced, and the sub outer forming plate 32 that clamps the side wall 3 is pulled and rotated, and the first ridge folded plate 17 is formed. 60 and the second mountain-folded plate 70 receive a force in the contraction direction of the pitch P of the mountain-fold line 17, but the first mountain-folded plate 60 has the first slider 61 against the urging force of the first spring 63. Since it moves in the direction in which the pitch P of the peak broken line 17 contracts, it moves following the contraction of the pitch P of the peak broken line 17, and the biasing force of the second spring 74 is exerted on the second peak folded plate 70. The second slider 72 moves in the direction in which the pitch P of the peak broken line 17 decreases in response to the movement of the second slider 72, so that the second slider 72 moves following the contraction of the pitch P of the peak broken line 17. Therefore, the peak portion 4b is smoothly bent without exerting an excessive force.
[0026]
Next, at the timing when the main outer forming disk 30 reaches the upright position Y1, the sub outer forming disk 32 is turned from the planar position X2 to the upright position Y2, as shown in FIG. Thereby, as shown in FIG. 11, the blank 10 is bent and erected at the bottom wall broken line 12 of the side wall 3 clamped by the holding plate 75. Along with this, the valley fold lines 16 that the first valley fold plate 40 and the second valley fold plate 50 of the main outer forming plate 30 come into contact with are further bent. In this case, the pitch P of the valley fold lines 16 is further reduced, and the first valley fold plate 40 and the second valley fold plate 50 are further subjected to a force in the contraction direction of the pitch P of the valley fold lines 16. Since the first base 41 moves in the direction in which the pitch P of the valley bent line 16 is reduced against the urging force of the first spring 43, the one-valley folded plate 40 reduces the pitch P of the valley bent line 16. Since the second base 51 oscillates in the direction in which the pitch P of the valley bent line 16 is reduced, the second valley folded plate 50 moves against the urging force of the second spring 54. The valley line 16 moves following the contraction of the pitch P. Therefore, the valley 4a is smoothly bent without exerting an excessive force.
Further, as shown in FIG. 12, the second valley folded plate 50 is reduced in pitch P of the valley fold lines 16 as the side wall 3 clamped by the presser plate 75 is erected by the erecting of the sub outer forming plate 32. When the force is further applied in the direction, the second valley folded plate 50 is pushed and tilts against the urging force of the spring material to escape from the valley 4a. Therefore, the valley portion 4a is smoothly bent at this point without excessive force acting.
[0027]
Further, the fold line 17 at which the first fold plate 60 and the second fold plate 70 contact each other is further bent. In this case, the pitch P of the crest broken line 17 is further reduced, and the first crest folded plate 60 and the second crest folded plate 70 further receive a force in the contraction direction of the pitch P of the crease broken line 17. Since the first slider 61 moves in the direction in which the pitch P of the peak broken line 17 contracts against the biasing force of the first spring 63, the one-hill folded plate 60 reduces the pitch P of the peak broken line 17. The second slider 72 moves in the direction in which the pitch P of the crease 17 is reduced against the urging force of the second spring 74. It moves following the contraction of the pitch P of the part-fold line 17. Therefore, the peak portion 4b is smoothly bent without exerting an excessive force.
Furthermore, even if the first mountain fold plate 60 and the second mountain fold plate 70 receive further force in the contraction direction of the pitch P of the mountain fold line 17, as shown in FIG. Since the 60 and the second peak folded plate 70 are formed of a flexible member, they bend and bend, so that the peak 4b is smoothly bent without exerting an excessive force on this point as well.
[0028]
Finally, as shown in FIG. 13, the inner molding block 26 is advanced from the steady position by driving the air cylinder device 27, and the box 1 is pushed out below the intermediate frame 22. Thereby, the folded blank 10 passes through the forming hole 80, and the side wall 3 is bent upright by the forming surface of the inner forming block 26 and the forming hole 80, so that the valley 4a and the ridge 4b are securely formed. And the box 1 is formed as shown in FIG.
This box 1 is stored in a receiving section 90 as shown in FIG. In this state, the inner forming block 26 is returned to the steady position by driving the air cylinder device 27. Then, the receiving section 90 receiving the box 1 is moved from the receiving position to the take-out position by the discharge mechanism 91 as shown in FIG. 3, and the box 1 is taken out manually or automatically. Then, the receiving unit 90 is returned from the unloading position to the receiving position by the discharging mechanism 91. The main outer forming plate 30 and the sub outer forming plate 32 are also returned from the upright positions Y1 and Y2 to the plane positions X1 and X2. Thus, the box 1 is formed.
In this case, since the box 1 is automatically formed, the manufacturing time is greatly reduced and the manufacturing efficiency is improved as compared with the case where the box 1 is conventionally formed manually.
[0029]
In the above embodiment, the numbers of the first valley folded plate 40, the second valley folded plate 50, the first ridge folded plate 60, and the second ridge folded plate 70 are limited to the above numbers. Instead, it may be provided as appropriate in accordance with the folding line of the bellows portion 4. Further, in the above embodiment, the air cylinder device is provided as a driving method, but the driving method is not necessarily limited to this. For example, an electric servo driving method using a ball screw, a hydraulic driving method, etc. The driving method may be used and may be changed as appropriate.
[0030]
【The invention's effect】
As described above, according to the box forming apparatus of the present invention, by rotating the main outer forming disk and the sub outer forming disk, the blank can be folded along the polygonal line and formed into a rectangular tube shape. In particular, since the valley fold plate and the valley fold plate follow the reduction of the pitch of the fold line in each fold plate to alternately fold the valley and the valley to form the bellows portion, an excessive force acts. In addition, the box can be formed extremely easily while smoothly bending the box. That is, the present invention can realize automation which is capable of coping with complicated folding and facilitate mass production.
And, when the inner forming block is provided so as to be vertically movable, and the side wall is formed in an upright state at the forming hole when the inner forming block is moved down, the folding can be firmly ensured, The appearance of the box can be assured.
[0031]
Also, the valleys and the ridges are folded by the first valley fold plate, the second valley fold plate, the first ridge fold plate, and the second ridge fold plate so that each fold plate follows the shrinkage of the folding line pitch. In the case of forming the bellows part, it is possible to fold according to the conditions of each part of the blank according to the moving direction of the side wall to be folded, so that it can be smoothly bent without applying excessive force. In addition, the folding can be more firmly ensured, and the shape of the box can be ensured.
Furthermore, when the forming hole for forming the side wall upright when the inner forming block is moved down is constituted by the base ends of the pair of main outer forming disks and the pair of subordinate forming disks, the outer forming plate is used. Therefore, the structure can be simplified without providing a separate mold.
Furthermore, each first valley fold plate is provided on the first base movable in the direction in which the pitch of the valley fold line contracts and urged in the initial position direction by the first spring, and each second valley fold plate is provided with a valley. When provided on the second base movable in the direction in which the pitch of the part-fold line contracts and biased in the initial position direction by the second spring, the biasing force of the spring is appropriately determined, and the first valley folded plate and Since the second valley folded plate can be moved, folding can be performed in accordance with the conditions of each part due to the movement of the side wall, and the folding can be more reliably performed.
Also, the second valley folded plate is attached by being biased by a spring material in a direction in which the second valley folded plate can be tilted with respect to the second base and in a counter-tilting direction. In a case where the valley portion is configured to be tilted against the urging force of the material and to be able to escape from the valley portion, the valley portion can be smoothly bent without exerting an excessive force.
[0032]
Further, each of the first mountain-folded plates is attached to a first slider movable in a direction in which the pitch of the mountain-fold line is reduced and urged in the initial position direction by a first spring. When attached to the second slider movable in the direction in which the pitch of the polygonal line contracts and biased in the initial position direction by the second spring, the biasing force of the spring is appropriately determined, and the first peak portion folded plate and the second Since the two-folded folded plate can be moved, the folding can be performed according to the conditions of each part due to the movement of the side wall, and the folding can be more reliably performed.
Furthermore, when each of the first and second crests is formed of a flexible member, it bends and bends even if further force is applied in the direction in which the pitch of the creases of the crests is reduced. Therefore, the valley can be smoothly bent without exerting an excessive force.
Further, when the standing member of the subordinate outer forming machine is provided with a pressing plate that presses the side wall of the blank against the subordinate outer forming machine, displacement can be prevented, and the molding can be performed reliably.
[0033]
Further, when a plurality of positioning pins for positioning the blank at a predetermined position in a planar state are provided so as to be able to protrude and retract, positioning can be performed reliably, and molding can be performed reliably.
In this case, if a plurality of sets of positioning pins are provided according to the size of the blank, boxes having different sizes can be created by one device, and versatility can be improved.
Further, when a receiving portion for receiving the box passing through the forming hole and a discharging mechanism for moving the receiving portion to the outside of the base and discharging the box are provided, the product can be automatically discharged. Accordingly, manufacturing efficiency can be improved accordingly.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a box forming apparatus according to an embodiment of the present invention.
FIG. 2 is a front view showing a box forming apparatus according to the embodiment of the present invention.
FIG. 3 is a side view showing the box forming apparatus according to the embodiment of the present invention.
FIG. 4 is a plan view showing a box forming apparatus according to the embodiment of the present invention.
FIG. 5 is a perspective view showing an attached state of the first valley folded plate and the second valley folded plate of the main outer molding machine in the box forming apparatus according to the embodiment of the present invention.
FIG. 6 is a perspective view showing an attached state of a first fold plate of the box forming apparatus according to the embodiment of the present invention.
FIG. 7 is a perspective view showing a mounting state of a second fold portion folded plate of a sub-outside forming machine of the box forming apparatus according to the embodiment of the present invention.
FIG. 8 is a perspective view showing a state in which a blank is supported in a step of forming a box by the box forming apparatus according to the embodiment of the present invention.
FIG. 9 is a perspective view showing a bent state of a blank in a step of forming a box by the box forming apparatus according to the embodiment of the present invention.
FIG. 10 is a front view showing a state at a standing position of a sub outer forming disc in a step of forming a box by the box forming apparatus according to the embodiment of the present invention.
FIG. 11 is an enlarged perspective view showing a bent state of a blank at a standing position of a sub outer forming plate in a step of forming a box by the box forming apparatus according to the embodiment of the present invention.
FIG. 12 is a diagram illustrating a step of forming a box by the box forming apparatus according to the embodiment of the present invention; It is a top view which shows the state of a board.
FIG. 13 is a front view showing a state in which an inner forming block is lowered in a step of forming a box by the box forming apparatus according to the embodiment of the present invention.
FIG. 14 is a perspective view showing an example of a box formed by the box forming apparatus according to the embodiment of the present invention.
FIG. 15 is a perspective view showing an example of a box formed by the box forming apparatus according to the embodiment of the present invention in a semi-expanded state.
FIG. 16 is a plan view showing an example of a box blank formed by the box forming apparatus according to the embodiment of the present invention in a developed state.
[Explanation of symbols]
1 box
2 Bottom wall
3 Side wall
4 bellows
5 Lid
10 blank
11 Corner
12 Bottom wall broken line
13 Side wall broken line
14 extra area
P1, P2 corner point
15 Diagonal line
P pitch
16 Tanibe Line
17 Yamabe Line
20 bases
21 Upper frame
22 Intermediate frame
23 Lower frame
24 props
25 Reinforcement frame
26 Inside molding block
27 Air cylinder device
30 Main outside forming machine
31 Air cylinder
X1 plane position
Y1 Standing position
32 Secondary molding machine
X2 plane position
Y2 standing position
40 First valley folded plate
41 First Base
43 first spring
50 Second valley folded plate
51 Second Base
54 Second spring
55 hinge
60 First mountain folded plate
61 First slider
63 First spring
70 Folded plate of the second mountain
71 Standing member
72 Second slider
74 Second spring
75 Holding plate
80 Forming hole
83 Positioning pin
90 Receiving part
91 Ejection mechanism

Claims

A sheet-like blank is folded along a polygonal line to form a square tube, and has a rectangular bottom wall, four rectangular side walls connected to the bottom wall, and valleys and peaks formed between adjacent side walls alternately. In a box forming device having a continuous bellows portion,
A column-shaped inner forming block provided on a base and forming the inside of the box,
A pair of side walls of the blank, which are rotatably provided on the base, and the opposing areas on both sides of the side walls, which constitute the bellows portion, are bent from the outside of the blank to be folded along a folding line to stand. A pair of main outer forming machines,
A pair of sub-outside forming plates that are rotatably provided on the base and are erected by bending a pair of other side walls of the blank facing each other from the outside of the folded blank along a folding line,
A plurality of valley fold plates that are provided on the main outer forming plate and abut against the fold line of the extra area and move following the contraction of the pitch of the fold line to fold the fold line into a concave,
It is provided to be suspended from the upper portion of the base and is provided on the sub-outside forming plate and abuts on the folding line of the surplus area from the inside of the blank to be folded and moves following the contraction of the pitch of the folding line. A box forming apparatus, comprising: a plurality of mountain folded plates for folding a folding line into a convex shape.

A molding having a molding surface which is provided on the base so as to be movable up and down on the base so that the inner molding block and the folded blank pass when the inner molding block moves down and the side wall is molded upright when passing. The box forming apparatus according to claim 1, wherein a hole is provided.

A box having a rectangular bottom wall, four rectangular side walls connected to the bottom wall, and a bellows portion formed between adjacent side walls and having a valley portion and a mountain portion alternately continuous, and a substantially rectangular sheet-shaped blank , A rectangular bottom wall is defined by a bottom wall polygonal line, and four rectangular side walls that are continuous with each bottom wall polygonal line are defined by the bottom wall polygonal line and the side wall polygonal line. A diagonal polygonal line connecting the corner point of the blank and the corner point of the bottom wall is formed in an extra area forming the bellows portion, and the outer area extends from each outer side to the diagonal polygonal line in the extra area. A valley fold line and a ridge fold line that are inwardly concave at a predetermined pitch are alternately provided in parallel with the side wall fold line on the side where the side is located, and the blank is folded along the above fold line to form a square tubular shape. Box forming equipment
A pillar-shaped inner forming block having a bottom surface facing the inner surface of the bottom wall of the folded blank provided on the base and four side surfaces facing the inner surface of the side wall to form the inside of the box;
A pair of side walls that are rotatably provided on the base and a pair of side walls of the blank and a plane position that respectively support the remaining areas on both sides of the side walls in a planar manner, and the pair of side walls that are rotated and face each other; A pair of pairs which are pressed against the surplus areas on both sides of the side wall and bent along the broken line of the bottom wall and the broken line of the side wall, respectively, and are moved from the plane position to two standing positions where the side wall stands up along the inner forming block. Main outer forming machine,
A plane position for rotatably provided on the base and supporting a pair of other side walls of the blank facing each other in a plane shape, and being rotated to press the other side wall and bend along the bottom wall folding line. A pair of secondary forming plates which are moved to two positions of a standing position to be raised from the plane position,
One side edge is in contact with a valley fold line between a side wall provided on the main outer forming machine and raised by the main outer forming machine and a diagonal fold line of the surplus area, and follows the contraction of the pitch of the valley fold line. A plurality of first valley fold plates to move and fold the valley broken line into a concave,
One edge of the valley fold line abuts a valley fold line between another side wall provided on the main outer forming machine and erected by the sub outer mold machine and a diagonal fold line of the surplus area, and the pitch of the valley fold line shrinks. A plurality of second valley fold plates that move to follow and fold the valley broken line into a concave,
Both side edges of the blank are suspended from the upper side of the base and are folded from the inside of the blank to be folded by the main outer forming plate and the diagonal bend line of the surplus area. A plurality of first mountain fold plates that move following the contraction of the pitch of the polygonal line and fold the mountain polygonal line convexly;
A mountain between another side wall which is provided on an upright member erected at the tip end of the subordinate outer forming machine and is erected by the subordinate forming machine from the inside of the folded blank and a diagonal polygonal line of the surplus area. A plurality of second fold plates which abut both side edges of the fold line and follow the contraction of the pitch of the fold line and move to fold the fold line into a convex shape. Box forming equipment.

A molding having a molding surface which is provided on the base so as to be movable up and down on the base so that the inner molding block and the folded blank pass when the inner molding block moves down and the side wall is molded upright when passing. 4. The box forming apparatus according to claim 3, wherein a hole is provided, and the forming hole is formed by base ends of the pair of main outer forming disks and the pair of subsidiary outer forming disks that rotate.

The first valley fold plate and the second valley fold plate are formed in accordance with the length from the outer side of the surplus area of the surplus area fold line to the diagonal fold line,
Each of the first valley fold plates is attached to the first base at the other side edge side, and the first valley fold plate abuts on the main outer forming plate from an initial position where it abuts the valley fold line. The first base is movably provided in a direction in which the pitch of the valley broken line is reduced, and the first base is urged by a first spring that can be reduced by reducing the pitch of the valley broken line in the initial position direction,
Each of the second valley fold plates is attached to the second base at the other side edge side, and the second valley fold plate abuts on the main outer forming plate from an initial position where it abuts the valley fold line. The valley bent line is provided so as to be swingable in a direction in which the pitch of the broken line is reduced, and the second base is urged in the initial position direction by a second spring that can be reduced by reducing the pitch of the valley broken line. Item 5. A box molding apparatus according to Item 4.

The second valley folded plate is attached to the second base by being biased by a spring material in a tiltable and counter-tilting direction with a spring material, and the main outer forming plate is pushed by a box in a process of reaching the upright position. The box forming apparatus according to claim 5, wherein the box is tilted against the urging force of the spring material so as to be able to escape from the valley.

Each of the first crest fold plate and the second crest fold plate is formed in accordance with the length from the outer side of the surplus area to the diagonal fold line of the ridge break line of the surplus area,
Each of the first crests is attached to the first slider at one end thereof, and the first crest contacts the top of the base from an initial position where the first crest contacts the crease line. The first slider is movably provided in a direction in which the pitch of the crease line is reduced, and the first slider is urged in the initial position direction by a first spring that can be reduced by contraction of the pitch of the crease line,
Each of the second ridge folded plates is attached to the second slider at one end thereof, and the second slider folds the second ridge folded from the initial position where the second slider comes into contact with the standing member of the subordinate forming plate with the ridge folding line. The second slider is urged by a second spring that can be reduced in the initial position direction by contracting the pitch of the crest line, the plate being movably provided following the contraction of the pitch of the crest line. The box forming apparatus according to claim 4, 5 or 6, wherein:

8. The box forming apparatus according to claim 4, wherein each of said first and second fold plates is formed of a flexible member.

The standing member of the slave outer forming machine is provided so as to be openable and closable with respect to the slave outer forming machine in parallel with the second ridge folded plate, and when opened, another side wall of the blank is provided on the slave outer forming machine. 9. The box forming apparatus according to claim 4, further comprising a holding plate for allowing the supporting and pressing the other side wall against the subordinate forming plate when closed.

10. The box forming apparatus according to claim 4, wherein a plurality of positioning pins for positioning the blank at a predetermined position in a planar state are provided on the base so as to be able to protrude and retract. .

The box forming apparatus according to claim 10, wherein a plurality of sets of the positioning pins are provided in accordance with the size of the blank.

5. A receiving portion for receiving a box passing through the forming hole, and a discharging mechanism for discharging the box by moving the receiving portion to the outside of the base. , 5, 6, 7, 8, 9, 10 or 11.