JP3604419B2

JP3604419B2 - Bag sealing device

Info

Publication number: JP3604419B2
Application number: JP06456894A
Authority: JP
Inventors: 久典宮田
Original assignee: エスアイ精工株式会社; 株式会社岡部ロック
Priority date: 1994-03-07
Filing date: 1994-03-07
Publication date: 2004-12-22
Anticipated expiration: 2019-12-22
Also published as: JPH07242205A

Description

【０００１】
【産業上の利用分野】
この発明は、例えば、段ボール製の箱体、合成樹脂製の箱体等に敷設された合成樹脂製又は紙製の袋体を封鎖する作業に用いられる袋封鎖装置に関する。
【０００２】
【従来の技術】
従来、上述例のような合成樹脂製の包装袋を封鎖する方法としては、例えば、適宜量の充填物が投入された包装袋の上端側を作業者の手で扁平状態に緊張した後、同包装袋の上端側を接着又は溶着して密封する方法がある。
【０００３】
【発明が解決しようとする課題】
しかし、上述のように適宜量の充填物が投入された包装袋を作業者の手で封鎖する場合、包装袋内に残留する雰囲気を完全に脱気することが困難であり、所定サイズに形成された段ボール箱内に対して収納される大きさに包装袋を緊縮することができない。且つ、包装袋の上端側が短いと作業者の手で皺を伸ばした状態に緊張することが困難であり、包装袋の上端側を扁平可能な長さに形成しなければならない。
【０００４】
また、粉状の充填物が投入された包装袋を封鎖する場合、封鎖作業時に於て、粉塵や塵埃等が含まれる雰囲気が包装袋の外部に漏洩するため、作業環境が悪くなるという問題点を有している。且つ、段ボール箱内に収納するまえに包装袋を封鎖する場合、包装袋の上端側を扁平状態に緊張したとき充填物の中央部分が盛り上がり、所定サイズに形成された段ボール箱内に収納したとき包装袋の一部が食み出してしまうので、封函作業前に於て、包装袋内に投入された充填物を平坦に均すための作業及び工程を設けなければならず、作業能率が悪くなるという問題点も有している。
【０００５】
この発明は上記問題に鑑み、箱体内に敷設した状態のままで袋体の抜気作業及び封鎖作業が行え、作作業の省力化及び能率アップを図ることができる袋封鎖装置の提供を目的とする。
【０００６】
【課題を解決するための手段】
請求項１記載の発明は、箱体の開放側周縁部よりも上方に突出する袋体の投入口を封鎖する袋封鎖装置であって、上記袋体の投入口に挿入され、該袋体を扁平状態に緊張する一対の各袋緊張体と、上記各袋緊張体により扁平状態に緊張された袋体内に残留する雰囲気を抜気する袋抜気手段と、上記各袋緊張体により扁平状態に緊張された袋体の上端側を両側から保持する一対の各袋巻回体と、上記一対の各袋巻回体を回転させながら降下させる袋巻回機構と、上記一対の各袋巻回体により巻回された袋体の耳部を箱体の前後部に差し込む袋差込み板とを備えた袋封鎖装置であることを特徴とする。
【０００７】
請求項２記載の発明は、上記の請求項１記載の構成と併せて、上記袋抜気手段を、上記袋体内に挿入される袋緊張体を中空形状に形成し、該袋緊張体の吸気側端部に抜気孔を形成すると共に、上記袋緊張体の吐出側端部に雰囲気を吸引するための吸引装置を連通接続して構成した袋封鎖装置であることを特徴とする。
【０００８】
請求項３記載の発明は、上記請求項１記載の発明の構成と併せて、上記各袋緊張体により扁平状態に緊張した袋体の上端側を気密状態に接合する袋密封手段を備えた袋封鎖装置であることを特徴とする。
【０００９】
【作用】
請求項１記載の袋封鎖装置は、箱体の開放側周縁部よりも上方に突出した袋体の投入口に一対の各袋緊張体を挿入して扁平状態に緊張し、袋抜気手段を駆動して、袋体内に残留する雰囲気を強制的に抜気した後、各袋緊張体により扁平状態に緊張された袋体の上端側を一対の各袋巻回体で保持する。袋巻回機構を駆動して、一対の各袋巻回体を回転させながら降下させ、各袋巻回体で保持した袋体の上端側を巻回し、各袋巻回体により巻回された袋体の耳部を袋差込み板により箱体の前後部に差し込んで封鎖する。
【００１０】
請求項２記載の袋封鎖装置は、上記の請求項１記載の作用と併せて、袋体の投入口に一対の各袋緊張体を挿入して扁平状態に緊張した後、吸引装置を駆動して、袋体内に残留する雰囲気を各袋緊張体の各抜気孔から強制的に抜気するので、箱体内に対して収納される大きさに袋体を緊縮することができる。
【００１１】
請求項３記載の袋封鎖装置は、上記の請求項１記載の作用と併せて、一対の各袋緊張体により扁平状態に緊張した袋体の上端側を袋密封手段により溶着又は接着して密封するので、袋体の気密状態が保持され、袋体内の充填物が外部に漏洩したり、袋体内に異物や外気が侵入するのを防止できる。
【００１２】
【発明の効果】
この発明によれば、袋体内に残留する雰囲気を袋抜気手段により抜気してから密封するので、封鎖作業時に於て、粉塵や塵埃等を含む雰囲気が袋体外部に漏洩したりせず、作業環境が悪くなるのを防止できる。且つ、所定サイズに形成された箱体内に対して収納される大きさに袋体を緊縮することができ、袋体の封鎖作業及び箱体の封函作業が容易に行えると共に、袋封鎖工程の後段側に箱封函工程を直結して、装置全体の設置スペースを小さくすることができる。
【００１３】
しかも、箱体内に敷設した状態のままで袋体の抜気作業及び密封作業が行え、作業の省力化及び能率アップを図ることができると共に、袋体内に投入された充填物の上面側を平坦に均した状態で作業を行うことができ、袋体を収納する箱体のサイズを小型化することができる。且つ、袋体の上端側を各袋緊張体により扁平状態に緊張するので、従来例のように作業者の手で袋体の上端側を扁平状態に緊張する必要が無く、袋体の全長を短くして、コストの低減を図ることができる。
【００１４】
【実施例】
この発明の一実施例を以下図面に基づいて詳述する。
図面は箱体の一例として段ボール箱内に敷設された包装袋を封鎖する作業に用いられる袋封鎖装置を示し、図１、図２、図３に於いて、この袋封鎖装置１は、充填工程（図示省略）から供給される段ボール箱Ｂを箱送り方向に搬送する箱送りコンベア２と、箱送りコンベア２上の箱停止位置に搬送停止された段ボール箱Ｂを適宜高さに持上げる箱昇降機構３と、段ボール箱Ｂに被覆された包装袋Ｆの投入口Ｆａを上方に捲上げる袋捲上げ機構４と、上方に捲上げられた包装袋Ｆの投入口Ｆａを扁平状態に緊張する袋緊張機構５と、包装袋Ｆの上部両側面を押圧して皺延ばしする袋押圧機構６と、包装袋Ｆの投入口Ｆａを気密状態に密封する袋密封機構７と、密封された包装袋Ｆの上端側を巻回する袋巻回機構８と、包装袋Ｆの各耳部Ｆｂ，Ｆｂを段ボール箱Ｂの前後部に差込みする袋差込み機構９とから構成される。
【００１５】
上述の段ボール箱Ｂは、上面開放形態に組立てられた段ボール箱Ｂ内に、透明又は半透明の合成樹脂フィルムで形成された包装袋Ｆを上向きに開口して敷設すると共に、同段ボール箱Ｂに起立形成された前後の各フラップＢａ，Ｂａ及び左右の各フラップＢｂ，Ｂｂに包装袋Ｆの投入口Ｆａを外側に折返してシングル折り状態又はダブル折り状態に被覆している。なお、段ボール箱Ｂ内に敷設された包装袋Ｆには、例えば、粉状又は粒状の塗装用原料、食品用原料、或いは、ボルトやナット等の防錆油が塗布された金属部品を適宜量充填している。
【００１６】
前述の箱送りコンベア２は、左右に架設した各取付け枠１４，１４間に多数本の各送りローラ１５…を箱送り方向に対して所定間隔に隔てて軸架し、減速機付き送り用モータ（図示省略）の駆動力により各送りローラ１５…を箱送り方向に回転して、同各送りローラ１５…上に載置された段ボール箱Ｂを箱送り方向に向けて搬送する。且つ、箱送りコンベア２上に設定した箱停止位置直前にストッパ１６を出没自在に設け、同箱停止位置直後にストッパ１７を出没自在に設け、同位置下部の前後に配設した各出没用シリンダ１８，１９のピストンロッドを各ストッパ１６，１７に連結して、同各出没用シリンダ１８，１９の作動により、箱送りコンベア２の搬送面上に各ストッパ１６，１７を出没動作させ、箱停止位置直前に後続の段ボール箱Ｂをストッパ１６で一旦停止し、箱停止位置直上に先行する段ボール箱Ｂをストッパ１７で一旦停止する。
【００１７】
前述の箱昇降機構３は、箱送りコンベア２上に設定した箱停止位置下部に箱昇降台２０を配設し、同箱昇降台２０上に固定した３本の各箱載置枠２０ａ…を上述した各送りローラ１５…間に挿入される前後間隔に隔てて立設し、同箱昇降台２０の一側端部に固定したナット部２１と、同位置側部に垂直軸受したネジ軸２２とを螺合し、同位置側部に配設した減速機付き昇降用モータ２３の駆動力によりネジ軸２２を正逆回転して、箱送りコンベア２の搬送面よりも上方に各箱載置枠２０ａ…を突出した上昇位置と、箱送りコンベア２の搬送面よりも下方に各箱載置枠２０ａ…を没入した降下位置とに箱昇降台２０を昇降停止する。
【００１８】
前述の袋捲上げ機構４は、図４にも示すように、箱送りコンベア２上に設定した箱停止位置の下部両側に各支軸２６，２６を箱送り方向と平行して軸架し、同各支軸２６，２６上に箱送りコンベア２の搬送面よりも上方に突出する長さ寸法に形成した各可動枠２７，２７の下端部を固定し、左右の各取付け枠１４，１４に固定した各揺動用シリンダ２８，２８のピストンロッドを各可動枠２７，２７の中間部に連結し、各可動枠２７，２７の一側面に鉛直固定した各昇降用シリンダ２９，２９のピストンロッド上端部を、段ボール箱Ｂの両側面と対応する横幅寸法に形成した各袋捲上げ板３０，３０の下端部に固定している。
【００１９】
つまり、各揺動用シリンダ２８，２８の作動により、上述の箱昇降台２０により持上げられた段ボール箱Ｂの下部両側面に各袋捲上げ板３０，３０を対接する閉角位置と、同段ボール箱Ｂの下部両側面に対して各袋捲上げ板３０，３０を適宜間隔に離間した開角位置とに各可動枠２７，２７を左右揺動する。且つ、各昇降用シリンダ２９，２９の作動により、箱送りコンベア２上の箱停止位置に搬送停止された段ボール箱Ｂの下部両側面と対向する降下位置と、上述の箱昇降台２０により持上げられた段ボール箱Ｂの各フラップＢａ，Ｂａ及び各フラップＢｂ，Ｂｂよりも上方に包装袋Ｆの投入口Ｆａを捲上げる上昇位置とに各袋捲上げ板３０，３０を上下動する。
【００２０】
前述の袋緊張機構５は、図２、図３にも示すように、箱送りコンベア２上の箱停止位置上部に架設した取付け枠３１の上面側中央部に昇降用シリンダ３２を垂直固定し、同昇降用シリンダ３２のピストンロッド下端部を昇降枠３３の上端側中央部に固定し、同昇降枠３３の前後端部に各連結アーム３３ａ，３３ａを前後回動可能に連結し、同各連結アーム３３ａ，３３ａの下端部に、中空形状に形成した各袋緊張棒３４，３４の上端部を固定し、同昇降枠３３の前後端部に固定した各回動用シリンダ３５，３５のピストンロッド下端部を各連結アーム３３ａ，３３ａの上端部に連結している。
【００２１】
つまり、昇降用シリンダ３２の作動により、上述の箱昇降台２０により持上げられた段ボール箱Ｂの各フラップＢａ，Ｂａ間に各袋緊張棒３４，３４が挿入される降下位置と、同段ボール箱Ｂの各フラップＢａ，Ｂａ間から各袋緊張棒３４，３４が引抜かれる上昇位置とに昇降枠３３を上下動する。且つ、各回動用シリンダ３５，３５の作動により、箱昇降台２０により持上げられた段ボール箱Ｂの各フラップＢａ，Ｂａ間に挿入される閉角位置と、同段ボール箱Ｂに起立形成された各フラップＢａ，Ｂａを開放及び包装袋Ｆの投入口Ｆａを扁平状態に緊張する開角位置とに各袋緊張棒３４，３４を前後回動する。
【００２２】
且つ、各袋緊張棒３４，３４の下端部に各抜気孔３４ａ，３４ａを相対向して形成すると共に、同各袋緊張棒３４，３４の上端部に接続した各フレキシブル菅３４ｂ，３４ｂを、装置上部に配設したベンチュリー型吸引装置８０の吸気口８０ａに電磁切換弁８１を介して接続している。つまり、各袋緊張棒３４，３４を包装袋Ｆ内に挿入するとき、同各袋緊張棒３４，３４で包装袋Ｆを緊張するとき、電磁切換弁８１を閉作動して吸引装置８０の負圧を遮断又は停止する。且つ、包装袋Ｆ内に残留する雰囲気を各袋緊張棒３４，３４の各抜気孔３４ａ，３４ａから吸気するとき、電磁切換弁８１を開作動して各袋緊張棒３４，３４と吸引装置８０とを直結する。
【００２３】
前述の袋押圧機構６は、図５、図６にも示すように、箱送りコンベア２上に設定した箱停止位置前段の中央上部に取付け枠３６を箱送り方向と直交して架設し、同取付け枠３６の前面側に水平架設した２本の各ガイドレール３７，３７間に各可動台３８，３８を左右移動可能に取付け、同取付け枠３６の前面側中央部に水平固定した各進退用シリンダ３９，３９のピストンロッドを各可動台３８，３８に連結して、同各進退用シリンダ３９，３９の作動により、上述の袋捲上げ機構４による袋捲上げ動作が許容される間隔に後述する各袋押圧板４５，４５を待避した後退位置と、段ボール箱Ｂに起立形成された各フラップＢｂ，Ｂｂの内側面に沿って各袋押圧板４５，４５を垂直挿入する中間位置と、上述の袋緊張機構５により緊張された包装袋Ｆの両側面を各袋押圧板４５，４５で押圧する前進位置とに各可動台３８，３８を左右移動する。
【００２４】
上述の各可動台３８，３８には、同各可動台３８，３８の前面側に垂直架設した２本の各ガイドレール４０，４０間に各昇降台４１，４１を上下移動可能に取付け、同各可動台３８，３８の上端部に垂直固定した各昇降用シリンダ４２，４２のピストンロッドを各昇降台４１，４１に連結して、同各昇降用シリンダ４２，４２の作動により、上述の箱昇降台２０により持上げられた段ボール箱Ｂの各フラップＢｂ，Ｂｂ間に後述する各袋押圧板４５，４５が挿入される降下位置と、同段ボール箱Ｂの各フラップＢｂ，Ｂｂ間から各袋押圧板４５，４５が引抜かれる上昇位置とに各昇降台４１，４１を上下動する。
【００２５】
上述の各昇降台４１，４１には、同各昇降台４１，４１の前面側中央部に２本の各支持アーム４３，４３を箱送り方向と平行して水平固定し、同各支持アーム４３，４３の先端側対向面に垂直固定した各支持枠４４，４４の下端部に、上述の袋緊張機構５により緊張された包装袋Ｆの上部両側面と対応する大きさに形成した台形の各袋押圧板４５，４５を垂直固定し、同各袋押圧板４５，４５の下端部に段ボール箱Ｂの各フラップＢｂ，Ｂｂよりも短尺寸法に形成した各袋押圧ローラ４６，４６を軸支し、一方に垂設した支持枠４４の両側端部に各補助ローラ４７，４７を軸支している。
【００２６】
且つ、上述の箱昇降台２０により持上げられた段ボール箱Ｂの各フラップＢｂ，Ｂｂよりも上方位置であって、同段ボール箱Ｂの各フラップＢｂ，Ｂｂよりも上方に捲上げられた包装袋Ｆの上部両側面と対向する左右位置に各噴射ノズル５１，５１を配設すると共に、同各噴射ノズル５１，５１を、例えば、エアコンプレッサーや送気用ブロワ等の送気装置（図示省略）に接続している。つまり、各噴射ノズル５１，５１から吐出される加圧エアで段ボール箱Ｂの各フラップＢｂ，Ｂｂよりも上方に捲上げられた包装袋Ｆの上部両側面を密着する方向に付勢する。
【００２７】
前述の袋密封機構７は、上述した各支持枠４４，４４の上端側中央部に各押圧用シリンダ４８，４８を水平固定し、同各押圧用シリンダ４８，４８のピストンロッドを各可動板４９，４９の背面側中央部に固定し、同各可動板４９，４９の長手側対向面に、上述の袋緊張機構５により緊張された包装袋Ｆの上部両側面と対向して長尺寸法の加熱ヘッド５０ａと受けヘッド５０ｂとを固定している。つまり、各押圧用シリンダ４８，４８の作動により、上述の袋緊張機構５により緊張された包装袋Ｆの上部両側面を加熱ヘッド５０ａと受けヘッド５０ｂとで熱溶着する前進位置と、上述した各袋押圧板４５，４５の押圧面よりも後方側に加熱ヘッド５０ａと受けヘッド５０ｂとを退避させた後退位置とに各可動板４９，４９を前後移動する。
【００２８】
前述の袋巻回機構８は、図７、図８にも示すように、箱送りコンベア２上に設定した箱停止位置後段の右側上部に取付け枠５２を箱送り方向と平行して架設し、同取付け枠５２の斜面側に水平架設した２本の各ガイドレール５３，５３間に可動台５４を前後移動可能に取付け、同各ガイドレール５３，５３間に取付けた可動台５４と、取付け枠５２の斜面側中央部に水平固定したロッドレスシリンダ５５の可動体５５ａとを連結固定して、同ロッドレスシリンダ５５の作動により、上述の袋緊張機構５により緊張された包装袋Ｆが後述する各袋巻回棒６１，６１間に挿入される前進位置と、同包装袋Ｆが各袋巻回棒６１，６１間から引抜かれる後退位置とに可動台５４を前後動する。
【００２９】
上述の可動台５４には、同可動台５４の前面側に垂直架設した２本の各ガイドレール５６，５６間に昇降台５７を上下移動可能に取付け、同可動台５４の上端部に固定した昇降用シリンダ５８のピストンロッドを昇降台５７に連結して、同昇降用シリンダ５８の作動により、上述の袋緊張機構５により緊張された包装袋Ｆを後述する各袋巻回棒６１，６１で巻始める上昇位置と、同包装袋Ｆを各袋巻回棒６１，６１で適宜数巻回した降下位置とに昇降台５７を上下動する。
【００３０】
上述の昇降台５７には、同昇降台５７の前面側中央部に支持アーム５９を箱送り方向と直交して固定し、同支持アーム５９の先端側前面に棒回転台６０を箱送り方向と対向して回転自在に軸支し、同昇降台５７の上下動作により、ピニオン６２と、ラック部６３と、各スプロケット６４，６５と、駆動チェーン６６とを介して、上述の袋緊張機構５により緊張された包装袋Ｆの上端側を後述する各袋巻回棒６１，６１で巻回する方向に棒回転台６０を回転する。
【００３１】
且つ、棒回転台６０の前面側中央部に、上述の袋緊張機構５により緊張された包装袋Ｆの上部両側面よりも長尺寸法に形成した２本の各袋巻回棒６１，６１を左右開閉可能に連結し、同棒回転台６０の前面部と各袋巻回棒６１，６１の基端部との間に圧縮装填した各コイルスプリング６７，６７の弾性により、２本の各袋巻回棒６１，６１を常時閉方向に回動付勢している。
【００３２】
且つ、支持アーム５９の先端側前面部に開閉アーム６８を前後回動可能に軸支し、同支持アーム５９の先端側上面部に固定した開閉用シリンダ６９のピストンロッドを開閉アーム６８の上端部に連結して、同開閉用シリンダ６９の作動により、各袋巻回棒６１，６１の基端部を各コイルスプリング６７，６７に抗して開閉アーム６８で押圧することで、上述の袋緊張機構５により緊張された包装袋Ｆが差込み許容される開放間隔と、同包装袋Ｆを保持する平行間隔とに２本の各袋巻回棒６１，６１を開閉回動する。
【００３３】
前述の袋差込み機構８は、箱送りコンベア２上の箱停止位置上部に架設した取付け枠３１の下部一側に昇降用シリンダ７０を垂直固定し、同昇降用シリンダ７０のピストンロッド下端部を昇降枠７１の上面側中央部に固定し、同昇降枠７１の前後端部に段ボール箱Ｂの前後内壁面に沿って挿入される間隔であって、同段ボール箱Ｂの前後部に挿入される大きさに形成した２枚の各袋差込み板７２，７２を垂直固定している。つまり、昇降用シリンダ７０の作動により、上述の箱昇降台２０により持上げられた段ボール箱Ｂの前後部に各袋差込み板７２，７２が垂直に差込まれる下降位置と、上述の袋巻回機構７による袋巻回動作が許容される高さに各袋差込み板７２，７２を待避した上昇位置とに昇降枠７１を上下動する。
【００３４】
且つ、各袋差込み板７２，７２の下端側対向面部に架設した支持板７３の下面側中央部に各支持軸７４，７４を上下摺動可能に軸受し、同各支持軸７４，７４の下端部を各袋差込み板７２，７２間に収納される大きさ及び形状に形成した押圧板７５の上面側中央部に固定し、同各支持軸７４，７４の下端側周面部に圧縮装填した各コイルスプリング７６，７６の弾性により、上述の各袋差込み板７２，７２を段ボール箱Ｂの前後部に差込んだとき、同段ボール箱Ｂ内に巻回収納された包装袋Ｆの上面側中央部を押圧板７５で押圧する。
【００３５】
且つ、昇降枠７１の下面側周縁部に集塵用ダクト７７を下向きに開放して固定し、同集塵用ダクト７７の上面側に接続した各フレキシブル菅７８，７８の一端側と、近傍位置に垂設した吸気用ダクト７９の下端側とを連通接続すると共に、装置上部に配設したベンチュリー型吸引装置８０の吸気口８０ｂに吸気用ダクト７９の上端側を連通接続している。つまり、吸引装置８０の負圧により、包装袋Ｆの投入口Ｆａから放出される粉塵や塵埃等の雰囲気を集塵用ダクト７７から吸気して集塵回収する。なお、上述の吸引装置８０を、例えば、リングブロワ等の吸気用ブロワ（図示省略）で構成するもよい。
【００３６】
図示実施例は上記の如く構成するものとして、以下、袋封鎖装置１による包装袋Ｆの封鎖動作を説明する。
先ず、図３、図９に示すように、充填工程（図示省略）から供給される段ボール箱Ｂを箱送りコンベア２上に載置して、同箱送りコンベア２上の箱停止位置に段ボール箱Ｂを搬送停止した後、箱昇降機構３を駆動して、同位置に搬送停止された段ボール箱Ｂを箱昇降台２０で適宜高さに一旦持上げると共に、袋緊張機構５の各袋緊張棒３４，３４を閉状態のまま段ボール箱Ｂの各フラップＢａ，Ｂａ間に挿入する。
【００３７】
次に、図１０に示すように、袋捲上げ機構４を駆動して、上述の箱昇降台２０により持上げられた段ボール箱Ｂの下部両側面に各袋捲上げ板３０，３０を押圧し、段ボール箱Ｂの各フラップＢａ，Ｂａ及び各フラップＢｂ，Ｂｂに被覆された包装袋Ｆの投入口Ｆａを各袋捲上げ板３０，３０で上方に捲上げる。同時に、図１１に示すように、袋緊張機構５を駆動して、上述の各袋捲上げ板３０，３０により捲上げられた包装袋Ｆの上端側を各袋緊張棒３４，３４で扁平状態に緊張すると共に、段ボール箱Ｂの各フラップＢａ，Ｂａを各袋緊張棒３４，３４で前後方向に開放する。この後、左右の各袋捲上げ板３０，３０を初期位置に降下復帰させる。
【００３８】
次に、図１２に示すように、上述の各袋緊張棒３４，３４により緊張された包装袋Ｆの両側面に左右の各噴射ノズル５１，５１から吐出される加圧エアを吹付けて、段ボール箱Ｂの各フラップＢｂ，Ｂｂよりも上方に捲上げられた包装袋Ｆの両側面を中央部に幅寄せする。図１３に示すように、袋押圧機構６を駆動して、段ボール箱Ｂの各フラップＢｂ，Ｂｂと包装袋Ｆの両側面との間に各袋押圧板４５，４５を挿入し、一方の袋押圧板４５側に軸支した各補助ローラ４７，４７で段ボール箱Ｂの各フラップＢａ，Ｂａを開放した状態に支持する。
【００３９】
次に、図１４に示すように、上述の各袋緊張棒３４，３４により緊張された包装袋Ｆの両側面を各袋押圧板４５，４５及び各袋押圧ローラ４６，４６で押圧し、包装袋Ｆ内に充填された充填物（図示省略）の上面側を各袋押圧ローラ４６，４６で平坦に均しながら転動すると共に、同包装袋Ｆの両側面に付いた不必要な皺や寄り等を伸ばしながら抜気押圧する。同時に、ベンチュリー型吸引装置８０の負圧により、包装袋Ｆ内に滞留する雰囲気を各袋緊張棒３４，３４の各抜気孔３４ａ，３４ａから吸気すると共に、同包装袋Ｆの上端側を前後方向に緊張した状態のまま各袋緊張棒３４，３４を上昇する。
【００４０】
この時、吸引装置８０の負圧により、包装袋Ｆの投入口Ｆａから放出される粉塵や塵埃等の雰囲気を集塵用ダクト７７から吸気して集塵回収する。なお、各袋緊張棒３４，３４及び集塵用ダクト７７から吸気した粉塵や塵埃等は適宜ストック部（図示省略）に集塵回収される。
【００４１】
次に、包装袋Ｆの投入口Ｆａが保持される高さ位置に各袋緊張棒３４，３４を上昇停止した後、図１５に示すように、袋密封機構７を駆動して、上述の各袋緊張棒３４，３４により緊張された包装袋Ｆの上部両側面を加熱ヘッド５０ａと受けヘッド５０ｂとで押圧し、加熱ヘッド５０ａと受けヘッド５０ｂとにより包装袋Ｆの密着部分を熱溶着して完全密封する。又は、加熱ヘッド５０ａと受けヘッド５０ｂとで包装袋Ｆの上端側対向面に塗布した熱溶融性の接着剤を溶融し、包装袋Ｆの密着部分を接着して完全密封するもよい。
【００４２】
次に、包装袋Ｆの両側面から各袋押圧板４５，４５及び加熱ヘッド５０ａと受けヘッド５０ｂとを離間した後、図１６に示すように、袋巻回機構７を駆動して、上述の各袋緊張棒３４，３４により扁平状態に緊張された包装袋Ｆの上端側を、その扁平状態の包装袋Ｆが保持される平行間隔に回動した２本の各袋巻回棒６１，６１間に挿入して保持し、左右の各袋押圧板４５，４５を初期位置に後退復帰させた後、２本の各袋巻回棒６１，６１を回転させながら降下して包装袋Ｆの上端側を適宜数巻回する。同時に、上述の各袋緊張棒３４，３４を初期位置に回動復帰させる。この後、包装袋Ｆの巻回部分から２本の各袋巻回棒６１，６１を抜取り初期位置に後退復帰させる。
【００４３】
次に、図１７、図１８に示すように、袋差込み機構８を駆動して、上述の箱昇降台２０上に載置された段ボール箱Ｂの前後部に各袋差込み板７２，７２を垂直挿入し、上述の各袋巻回棒６１，６１により巻回された包装袋Ｆの各耳部Ｂｂ，Ｂｂを段ボール箱Ｂの前後部に差込んだ後、２枚の各袋差込み板７２，７２を初期位置に上昇復帰させる。
【００４４】
この後、箱昇降機構３を降下駆動して、箱昇降台２０上に載置された段ボール箱Ｂを箱送りコンベア２上に載置し、箱封函工程（図示省略）に段ボール箱Ｂを搬送供給して、同段ボール箱Ｂの各フラップＢａ，Ｂａ及び各フラップＢｂ，Ｂｂを封函することで、同段ボール箱Ｂ内に包装袋Ｆを収納することができる。
【００４５】
以上のように、包装袋Ｆ内に残留する雰囲気を抜気してから気密状態に密封するので、封鎖作業時に於て、粉塵や塵埃等を含む雰囲気が包装袋Ｆ外部に漏洩したりせず、作業環境が悪くなるのを防止できる。且つ、所定サイズに形成された段ボール箱Ｂ内に対して収納される大きさに包装袋Ｆを緊縮することができ、包装袋Ｆの封鎖作業及び段ボール箱Ｂの封函作業が容易に行えると共に、封鎖工程の後段側に封函工程を直結して、装置全体の設置スペースを小さくすることができる。
【００４６】
しかも、段ボール箱Ｂ内に敷設した状態のままで包装袋Ｆの抜気作業及び密封作業が行え、作業の省力化及び能率アップが図れると共に、包装袋Ｆ内に投入された充填物の上面側を平坦に均した状態で作業を行うことができ、包装袋Ｆを収納する段ボール箱Ｂのサイズを小型化することができる。且つ、包装袋Ｆの上端側を各袋緊張棒３４，３４により扁平状態に緊張するので、従来例のように作業者の手で包装袋Ｆの上端側を緊張する必要が無く、包装袋Ｆの全長を短くして、コストの低減を図ることができる。
【００４７】
この発明の構成と、上述の実施例との対応において、
この発明の箱体は、実施例の段ボール箱Ｂに対応し、
以下同様に、
袋体は、包装袋Ｆに対応し、
各袋緊張体は、各袋緊張棒３４，３４に対応し、
各袋巻回体は、各袋巻回棒６１，６１に対応し、
袋抜気手段は、各袋緊張棒３４，３４と、吸引装置８０と、電磁切換弁８１とに対応し、
袋密封手段は、袋密封機構７及び加熱ヘッド５０ａと、受けヘッド５０ｂとに対応するも、
この発明は、上述の実施例の構成のみに限定されるものではない。
【００４８】
上述の実施例では、袋緊張機構５を構成する袋緊張棒３４に抜気孔３４ａを一個形成しているが、同袋緊張棒３４の下端側周面部に複数個の各抜気孔３４ａ…を形成したり、大径の抜気孔３４ａを形成するもよく、抜気量が増加するため、抜気効率が向上する。
【００４９】
また、箱送りコンベア２上の箱停止位置に搬送停止された段ボール箱Ｂの各フラップＢａ，Ｂａを前後方向に開放して、同段ボール箱Ｂに敷設された包装袋Ｆの投入口Ｆａを巻回するが、例えば、箱送りコンベア２上の箱停止位置に搬送された段ボール箱Ｂの各フラップＢｂ，Ｂｂを左右方向に開放して、同段ボール箱Ｂに敷設された包装袋Ｆの投入口Ｆａを巻回するもよい。
【図面の簡単な説明】
【図１】袋封鎖装置を構成する各機構の配置状態を示す正面図。
【図２】袋封鎖装置を構成する各機構の配置状態を示す側面図。
【図３】箱停止位置側に配設した各機構の配置状態を示す正面図。
【図４】箱送りコンベア及び袋捲上げ機構を示す平面図。
【図５】袋押圧機構の構造を示す側面図。
【図６】袋押圧機構の構造を示す正面図。
【図７】袋巻回機構の構造を示す平面図。
【図８】袋巻回機構の構造を示す背面図。
【図９】箱昇降機構による箱持上げ動作を示す側面図。
【図１０】袋捲上げ機構による袋捲上げ動作を示す正面図。
【図１１】袋緊張機構による袋緊張動作を示す側面図。
【図１２】包装袋の幅寄せ状態を示す正面図。
【図１３】袋押圧機構による抜気動作及び皺伸ばし動作を示す正面図。
【図１４】袋押圧機構による袋押圧動作を示す正面図。
【図１５】袋密封機構による袋密封動作を示す正面図。
【図１６】袋巻回機構による袋巻回動作を示す側面図。
【図１７】袋差込み機構による袋差込み動作を示す側面図。
【図１８】包装袋の差込み状態を示す側面図。
【符号の説明】
Ｂ…段ボール箱
Ｂａ，Ｂｂ…フラップ
Ｆ…包装袋
Ｆａ…投入口
Ｆｂ…耳部
１…袋封鎖装置
２…箱送りコンベア
３…箱昇降機構
４…袋捲上げ機構
５…袋緊張機構
６…袋押圧機構
７…袋密封機構
８…袋巻回機構
９…袋差込み機構
２０…箱昇降台
３０…袋捲上げ板
３４…袋緊張棒
３４ａ…抜気孔
３４ｂ…フレキシブル菅
４５…袋押圧板
４６…袋押圧ローラ
５０ａ…加熱ヘッド
５０ｂ…受けヘッド
６１…袋巻回棒
７２…袋差込み板
８０…吸引装置
８１…電磁切換弁[0001]
[Industrial applications]
The present invention relates to a bag closing device used for an operation of closing a synthetic resin or paper bag laid on a cardboard box, a synthetic resin box, or the like.
[0002]
[Prior art]
Conventionally, as a method of closing a synthetic resin packaging bag as in the above example, for example, the upper end side of a packaging bag into which an appropriate amount of filler has been put is tensioned to a flat state by an operator's hand, and then the same. There is a method of sealing the upper end side of the packaging bag by bonding or welding.
[0003]
[Problems to be solved by the invention]
However, when the packaging bag filled with an appropriate amount of the filling is closed by an operator's hand as described above, it is difficult to completely degas the atmosphere remaining in the packaging bag, and it is difficult to form the package into a predetermined size. The packaging bag cannot be shrunk to a size that can be accommodated in the closed cardboard box. In addition, if the top end of the packaging bag is short, it is difficult to tension the wrinkled state with the hand of an operator, and the top end of the packaging bag must be formed to have a flattenable length.
[0004]
In addition, when the packaging bag into which the powdery filler is charged is sealed, an atmosphere containing dust and dust leaks to the outside of the packaging bag during the sealing operation, so that the working environment is deteriorated. have. And, when the packaging bag is closed before being stored in the cardboard box, when the upper end side of the packaging bag is tensioned in a flat state, the central portion of the filling rises and is stored in the cardboard box formed in a predetermined size. Since a part of the packaging bag will protrude, it is necessary to provide an operation and a process for leveling the filling material that has been put into the packaging bag before the sealing operation. It also has the problem of worsening.
[0005]
In view of the above problems, an object of the present invention is to provide a bag sealing device capable of performing a bag removing operation and a sealing operation while being laid in a box body, thereby saving labor and improving efficiency of the operation. I do.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 isA bag closing device for closing an input port of a bag projecting upward from an opening side peripheral portion of a box, wherein each of a pair of each of which is inserted into the input port of the bag and tensions the bag in a flat state. A bag tensioner, bag degassing means for venting the atmosphere remaining in the bag tensioned to a flat state by each of the bag tensioners, and an upper end side of the bag tensioned to a flat state by each of the bag tensioners A pair of each bag roll holding both sides, a bag winding mechanism for lowering while rotating the pair of bag rolls, and a bag wound by the pair of each bag roll. Bag insertion plate that inserts ears into the front and back of the boxAnd a bag closing device comprising:
[0007]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the bag deflation means is configured such that a bag tension member inserted into the bag body is formed in a hollow shape, and the bag tension member is suctioned. The bag closing device is characterized in that a vent hole is formed at a side end and a suction device for suctioning an atmosphere is connected to the discharge side end of the bag tensioning body.
[0008]
The third aspect of the present invention, together with the configuration of the first aspect of the present invention,UpThe upper end side of the bag, which has been flattened by each bag tensioner, is joined in an airtight state.Equipped with bag sealing meansIt is a bag closing device.
[0009]
[Action]
In the bag closing device according to the first aspect, each of the pair of bag tension members is inserted into the inlet of the bag projecting upward from the peripheral edge of the open side of the box, and tensioned to a flat state.And bagAfter driving the air extraction means to forcibly exhaust the atmosphere remaining in the bag,The upper end side of the bag tensioned to a flat state by each bag tensioner is held by a pair of each bag roll. The bag winding mechanism is driven to lower while rotating the pair of bag winding bodies, and the upper end side of the bag body held by each bag winding body is wound, and the bag is wound by each bag winding body. The ears of the bag are inserted into the front and rear portions of the box with a bag insertion plate and closed.
[0010]
In the bag closing device according to the second aspect, in addition to the operation according to the first aspect, after inserting a pair of the respective bag tension members into the input port of the bag to tension the bag into a flat state, the suction device is driven. Since the atmosphere remaining in the bag body is forcibly evacuated from each air vent hole of each bag tension body, the bag body can be contracted to a size accommodated in the box body.
[0011]
A bag closing device according to a third aspect of the present invention provides the bag closing device, which is tensioned in a flat state by a pair of each bag tensioning member, in addition to the operation according to the first aspect.Bag sealing meansSince the bag is sealed by welding or bonding, the airtight state of the bag is maintained, and it is possible to prevent the filling material in the bag from leaking to the outside and to prevent foreign matter or outside air from entering the bag.
[0012]
【The invention's effect】
According to the present invention, since the atmosphere remaining in the bag body is evacuated by the bag evacuating means and then sealed, the atmosphere containing dust, dust and the like does not leak to the outside of the bag body during the closing operation. In addition, the working environment can be prevented from being deteriorated. In addition, the bag can be contracted to a size that can be accommodated in the box formed in a predetermined size, so that the bag closing operation and the box closing operation can be easily performed, and the bag closing process can be easily performed. The box-sealing process can be directly connected to the subsequent stage to reduce the installation space of the entire apparatus.
[0013]
In addition, the bag can be evacuated and sealed while being laid in the box, which can save labor and improve efficiency, and flatten the top surface of the filler charged into the bag. The work can be performed in a uniform state, and the size of the box storing the bag can be reduced. Moreover, since the upper end side of the bag body is tensioned in a flat state by each bag tensioner, it is not necessary to tension the upper end side of the bag body in a flat state with the hand of an operator as in the conventional example. By shortening the length, cost can be reduced.
[0014]
【Example】
An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawings show a bag sealing device used for an operation of closing a packaging bag laid in a cardboard box as an example of a box. In FIGS. 1, 2 and 3, the bag closing device 1 is used for a filling process. (Not shown), a box feed conveyor 2 for transferring a cardboard box B supplied from a box feed direction, and a box lifting and lowering box for raising the cardboard box B, which is stopped at a box stop position on the box feed conveyor 2, to an appropriate height. A mechanism 3, a bag-lifting mechanism 4 for rolling up the input port Fa of the packaging bag F covered with the cardboard box B, and a bag for tensioning the input port Fa of the packaging bag F wound upward to a flat state. A tensioning mechanism 5, a bag pressing mechanism 6 for pressing the upper side surfaces of the packaging bag F to expand the wrinkles, a bag sealing mechanism 7 for sealing the inlet Fa of the packaging bag F in an airtight state, and a sealed packaging bag F Winding mechanism 8 that winds the upper end of the bag, and each ear Fb, F of the packaging bag F Composed from the bag insertion mechanism 9 for inserting the front and rear portions of the corrugated board box B.
[0015]
The above-mentioned corrugated cardboard box B has a packaging bag F formed of a transparent or translucent synthetic resin film which is opened upward and laid in a corrugated cardboard box B assembled in an open-top form. The front and rear flaps Ba, Ba and the left and right flaps Bb, Bb, which have been formed upright, are turned outwardly to cover the input opening Fa of the packaging bag F in a single folded state or a double folded state. The packaging bag F laid in the corrugated cardboard box B may contain, for example, powdery or granular coating raw materials, food raw materials, or metal parts coated with rust-preventive oil such as bolts and nuts in an appropriate amount. Is filling.
[0016]
In the box feed conveyor 2 described above, a large number of feed rollers 15... Are mounted at a predetermined interval in the box feed direction between mounting frames 14, 14 provided on the left and right, and a feed motor with a speed reducer is provided. Each feed roller 15 is rotated in the box feed direction by the driving force (not shown), and the cardboard box B placed on each feed roller 15 is fed in the box feed direction. In addition, a stopper 16 is provided to be able to protrude and retract immediately before the box stop position set on the box feed conveyor 2, and the stopper 16 is provided immediately after the box stop position.17The retractable cylinders are provided so that the18, 19 are connected to each stopper 16,17Connected to each other,18, 19, each stopper 16, 16 on the conveying surface of the box feed conveyor 2.17And the next cardboard box B is temporarily stopped by the stopper 16 immediately before the box stop position, and the preceding cardboard box B immediately above the box stop position is stopped by the stopper 16.17To stop temporarily.
[0017]
The above-mentioned box elevating mechanism 3 arranges the box elevating table 20 below the box stop position set on the box feeding conveyor 2, and fixes the three box mounting frames 20a fixed on the box elevating table 20 to each other. A nut 21 fixed to one end of the lifting table 20 and a screw shaft 22 vertically mounted on the side of the same position at the same distance from the feed rollers 15. The screw shaft 22 is rotated forward and reverse by the driving force of a lifting / lowering motor 23 with a speed reducer disposed on the side of the same position, and each box is placed above the transport surface of the box feed conveyor 2. The box elevator 20 is lifted and stopped at a rising position where the frames 20a are projected and a lowering position where each of the box mounting frames 20a is immersed below the conveying surface of the box feeding conveyor 2.
[0018]
The aforementioned bag lifting mechanism 4 is shown in FIG.AlsoAs shown in the figure, the respective support shafts 26, 26 are mounted on the lower sides of the box stop position set on the box feed conveyor 2 in parallel with the box feed direction, and the box feed conveyor 2 is mounted on the respective support shafts 26, 26. The lower ends of the movable frames 27, 27 formed to have a length protruding above the transfer surface of the movable frames 27, 27 are fixed, and the piston rods of the swing cylinders 28, 28 fixed to the left and right mounting frames 14, 14 are fixed. The upper ends of the piston rods of the lifting / lowering cylinders 29, 29, which are connected to the intermediate portions of the movable frames 27, 27 and fixed vertically to one side surface of the movable frames 27, 27, have the width corresponding to the both side surfaces of the cardboard box B. It is fixed to the lower end of each of the bag hoisting plates 30, 30 formed in dimensions.
[0019]
In other words, by the operation of the swinging cylinders 28, 28, the closed angle position at which the bag lifting plates 30, 30 are brought into contact with the lower side surfaces of the cardboard box B lifted by the above-mentioned box elevator 20, and the same cardboard box. Each of the movable frames 27, 27 is swung right and left to an open angle position in which the bag lifting plates 30, 30 are appropriately spaced apart from both lower side surfaces of B. In addition, by the operation of the lifting cylinders 29, 29, the lowering position facing the lower side surfaces of the cardboard box B, which has been transported and stopped at the box stopping position on the box feeding conveyor 2, is lifted by the above-described box lifting table 20. The bag lifting plates 30, 30 are moved up and down to the respective flaps Ba, Ba of the corrugated cardboard box B and the ascending position at which the inlet Fa of the packaging bag F is raised above the flaps Bb, Bb.
[0020]
The aforementioned bag tensioning mechanism 5 is shown in FIGS.AlsoAs shown in the figure, an elevating cylinder 32 is vertically fixed to a central portion on the upper surface side of a mounting frame 31 erected above a box stop position on the box feeding conveyor 2, and a lower end of a piston rod of the elevating cylinder 32 is attached to the elevating frame 33. Each connecting arm 33a, 33a is fixed to an upper end side central portion, and the connecting arms 33a, 33a are connected to the front and rear ends of the lifting frame 33 so as to be able to rotate back and forth, and the lower ends of the connecting arms 33a, 33a are formed into hollow shapes. The upper ends of the bag tension bars 34, 34 are fixed, and the lower ends of the piston rods of the rotating cylinders 35, 35 fixed to the front and rear ends of the lifting frame 33 are connected to the upper ends of the connecting arms 33a, 33a. .
[0021]
That is, by the operation of the lifting cylinder 32, the lowering position where the bag tension rods 34, 34 are inserted between the flaps Ba, Ba of the cardboard box B lifted by the above-mentioned box lifting table 20, The lifting frame 33 is moved up and down between the respective flaps Ba and Ba to the raised position where the bag tension bars 34 and 34 are pulled out. In addition, by the operation of the rotating cylinders 35, 35, the closed angle position inserted between the flaps Ba, Ba of the cardboard box B lifted by the box elevating table 20, and the flaps formed upright on the cardboard box B Each of the bag tension rods 34, 34 is rotated back and forth to an open position where Ba, Ba are opened and the input port Fa of the packaging bag F is tensioned in a flat state.
[0022]
In addition, the air vent holes 34a, 34a are formed at the lower ends of the bag tension rods 34, 34 so as to face each other, and the flexible tubes 34b, 34b connected to the upper ends of the bag tension rods 34, 34, respectively. It is connected via an electromagnetic switching valve 81 to an intake port 80a of a venturi-type suction device 80 disposed at the top of the device. That is, when inserting the bag tension rods 34, 34 into the packaging bag F, and when tensioning the packaging bag F with the bag tension rods 34, 34, the electromagnetic switching valve is used.81Is operated to close or stop the negative pressure of the suction device 80. Further, when the atmosphere remaining in the packaging bag F is sucked through the air vent holes 34a, 34a of the bag tension bars 34, 34, the electromagnetic switching valve 81 is opened to operate the bag tension bars 34, 34 and the suction device 80. Is directly connected to
[0023]
The aforementioned bag pressing mechanism 6 is shown in FIGS.AlsoAs shown in the figure, a mounting frame 36 is erected orthogonally to the box feeding direction at the center upper part of the former stage of the box stop position set on the box feeding conveyor 2, and two guides horizontally erected on the front side of the mounting frame 36. The movable tables 38, 38 are mounted between the rails 37, 37 so as to be movable left and right, and the piston rods of the reciprocating cylinders 39, 39, which are horizontally fixed to the front center of the mounting frame 36, are mounted on the movable tables 38, 38. In connection with the operation of the respective retracting cylinders 39, 39, a retracted position in which each of the bag pressing plates 45, 45 described later is retracted at intervals at which the bag lifting operation by the above-described bag lifting mechanism 4 is allowed; An intermediate position where the bag pressing plates 45, 45 are vertically inserted along the inner surfaces of the flaps Bb, Bb formed upright on the cardboard box B, and both side surfaces of the packaging bag F tensioned by the bag tensioning mechanism 5 described above. To each bag pressing plate 45, 45 Each carriage 38, 38 in the advanced position to press for lateral movement.
[0024]
Each of the movable tables 38, 38 is vertically movably mounted between two guide rails 40, 40 vertically mounted on the front side of the movable tables 38, 38, respectively. The piston rods of the lifting cylinders 42, 42, which are vertically fixed to the upper ends of the movable tables 38, 38, are connected to the lifting tables 41, 41, respectively. Each bag pressing plate 45, 45 to be described later is inserted between the flaps Bb, Bb of the cardboard box B lifted by the elevating table 20, and each bag is pressed from between the respective flaps Bb, Bb of the cardboard box B. Each of the elevating tables 41, 41 is moved up and down to the ascending position where the plates 45, 45 are pulled out.
[0025]
The two support arms 43, 43 are horizontally fixed parallel to the box feeding direction at the center of the front side of the lift tables 41, 41, respectively. , 43 are fixed to the lower ends of the supporting frames 44, 44 vertically fixed to the opposing surfaces on the leading end side, respectively, in the trapezoidal shape formed in a size corresponding to the upper side surfaces of the packaging bag F tensioned by the bag tensioning mechanism 5 described above. The bag pressing plates 45, 45 are vertically fixed, and the bag pressing rollers 46, 46 formed at the lower ends of the bag pressing plates 45, 45 to be shorter than the flaps Bb, Bb of the cardboard box B are pivotally supported. Auxiliary rollers 47, 47 are pivotally supported on both side ends of a support frame 44 suspended on one side.
[0026]
In addition, the packaging bag F which is located above the flaps Bb, Bb of the cardboard box B lifted by the above-mentioned box elevator 20 and is raised above the flaps Bb, Bb of the cardboard box B. The injection nozzles 51, 51 are disposed at left and right positions opposite to both upper side surfaces of the nozzle, and the injection nozzles 51, 51 are connected to an air supply device (not shown) such as an air compressor or an air supply blower. Connected. In other words, the pressurized air discharged from each of the injection nozzles 51, 51 urges the upper side surfaces of the packaging bag F rolled up above the flaps Bb, Bb of the cardboard box B in a direction in which they are in close contact with each other.
[0027]
The above-described bag sealing mechanism 7 horizontally fixes the pressing cylinders 48, 48 at the center of the upper ends of the support frames 44, 44, and attaches the piston rods of the pressing cylinders 48, 48 to the movable plates 49. , 49 are fixed to the central portion on the back side of the movable plate 49, and each of the movable plates 49, 49 has a long dimension facing the upper side surfaces of the packaging bag F tensioned by the bag tensioning mechanism 5 described above. The heating head 50a and the receiving head 50b are fixed. That is, by the operation of each of the pressing cylinders 48, 48, the advanced position where the upper side surfaces of the packaging bag F tensioned by the above-described bag tensioning mechanism 5 are thermally welded by the heating head 50a and the receiving head 50b, and Each of the movable plates 49, 49 is moved back and forth to a retracted position where the heating head 50a and the receiving head 50b are retracted behind the pressing surfaces of the bag pressing plates 45, 45.
[0028]
The bag winding mechanism described above8Are shown in FIGS. 7 and 8.AlsoAs shown in the figure, a mounting frame 52 is erected parallel to the box feeding direction on the upper right side after the box stop position set on the box feeding conveyor 2 and two guides horizontally erected on the slope side of the mounting frame 52. A movable table 54 is mounted between the rails 53 and 53 so as to be movable back and forth, and a movable table 54 mounted between the guide rails 53 and 53 and a movable rodless cylinder 55 horizontally fixed to the center of the mounting frame 52 on the slope side. The body 55a is connected and fixed, and by operating the rodless cylinder 55, the packaging bag F tensioned by the bag tensioning mechanism 5 is inserted between the bag winding rods 61, 61 described later. The movable table 54 is moved back and forth to a retracted position where the packaging bag F is pulled out from between the bag winding rods 61.
[0029]
On the movable table 54, an elevating table 57 is vertically movably mounted between two guide rails 56 vertically provided on the front side of the movable table 54, and is fixed to the upper end of the movable table 54. The piston rod of the lifting / lowering cylinder 58 is connected to the lifting / lowering table 57, and by the operation of the lifting / lowering cylinder 58, the packaging bag F tensioned by the above-described bag tensioning mechanism 5 is moved by the respective bag winding rods 61, 61 described later. The elevating table 57 is moved up and down to an ascending position where winding is started and a descending position where the packaging bag F is appropriately wound several times by the bag winding rods 61 and 61.
[0030]
In the above-mentioned elevator 57, a support arm 59 is fixed at the center of the front side of the elevator 57 orthogonal to the box feeding direction, and the bar rotation table 60 is mounted on the front side of the tip of the support arm 59 in the box feeding direction. It is rotatably supported in opposition, and the vertical movement of the elevator 57 causes the above-described bag tensioning mechanism 5 via the pinion 62, the rack 63, each sprocket 64, 65, and the drive chain 66. The bar rotation table 60 is rotated in a direction in which the upper end side of the tensioned packaging bag F is wound by the bag winding bars 61 described later.
[0031]
In addition, two bag winding rods 61, 61 formed to be longer than both upper side surfaces of the packaging bag F tensioned by the above-described bag tensioning mechanism 5 are provided at the central portion on the front side of the bar rotation table 60. Left and right openable and closably connected, the elasticity of the coil springs 67, 67 compressed between the front surface of the rod rotating table 60 and the base end of the bag winding rods 61, 61 allows the two bags to be opened and closed. The winding rods 61 are constantly urged to rotate in the closing direction.
[0032]
Further, an opening / closing arm 68 is pivotally supported on the front end side of the support arm 59 so as to be able to rotate back and forth, and the piston rod of the opening / closing cylinder 69 fixed to the front end side of the support arm 59 is connected to the upper end of the opening / closing arm 68. When the opening / closing arm 69 is pressed by the opening / closing arm 68 against the coil springs 67, 67 by operating the opening / closing cylinder 69, the base end of each bag winding rod 61, 61 is pressed. The two bag winding rods 61 are opened and closed at an opening interval at which the packaging bag F tensioned by the mechanism 5 is allowed to be inserted and a parallel interval at which the packaging bag F is held.
[0033]
The above-mentioned bag insertion mechanism 8 vertically fixes a lifting cylinder 70 to one lower side of a mounting frame 31 erected above a box stop position on the box feeding conveyor 2 and raises and lowers a lower end of a piston rod of the lifting cylinder 70. It is fixed to the center of the upper surface side of the frame 71, and is an interval inserted along the front and rear inner wall surfaces of the cardboard box B at the front and rear ends of the lifting frame 71, and is inserted into the front and rear portions of the cardboard box B. The two bag insertion plates 72, 72 thus formed are vertically fixed. In other words, the lowering position where each bag insertion plate 72 is vertically inserted into the front and rear portions of the cardboard box B lifted by the above-mentioned box lifting table 20 by the operation of the lifting cylinder 70, and the above-mentioned bag winding mechanism The lifting frame 71 is moved up and down to a height where the bag insertion plates 72, 72 are retracted to a height at which the bag winding operation by 7 is allowed.
[0034]
In addition, the support shafts 74, 74 are vertically slidably supported at the lower central portion of a support plate 73 provided on the lower end side facing surface portions of the respective bag insertion plates 72, 72, and the lower ends of the support shafts 74, 74 are slidable. The fixing portion is fixed to the central portion on the upper surface side of the pressing plate 75 formed in a size and shape to be stored between the bag insertion plates 72, 72, and is compressed and loaded on the lower peripheral portion of the supporting shafts 74, 74. Due to the elasticity of the coil springs 76, 76, when the above-described bag insertion plates 72, 72 are inserted into the front and rear portions of the cardboard box B, the upper surface side central portion of the packaging bag F wound and stored in the cardboard box B. Is pressed by the pressing plate 75.
[0035]
Further, a dust collecting duct 77 is opened and fixed downwardly to the lower peripheral edge of the elevating frame 71, and one end of each of the flexible tubes 78, 78 connected to the upper surface of the dust collecting duct 77, and a nearby position. The lower end of the suction duct 79 is connected to the lower end of the suction duct 79, and the upper end of the suction duct 79 is connected to the suction port 80b of the venturi-type suction device 80 provided at the upper part of the device. That is, due to the negative pressure of the suction device 80, the atmosphere such as dust or dust discharged from the inlet Fa of the packaging bag F is sucked from the dust collection duct 77 and collected. The above-described suction device 80 may be configured by, for example, a suction blower (not shown) such as a ring blower.
[0036]
The illustrated embodiment is configured as described above, and the operation of closing the packaging bag F by the bag closing device 1 will be described below.
First, as shown in FIGS. 3 and 9, the cardboard box B supplied from the filling step (not shown) is placed on the box feeding conveyor 2, and the cardboard box B is moved to a box stop position on the box feeding conveyor 2. After stopping the transport of B, the box lifting mechanism 3 is driven to lift the cardboard box B transported and stopped at the same position once to an appropriate height by the box lifting and lowering platform 20, and each of the bag tensioning rods of the bag tensioning mechanism 5 34, 34 are inserted between the flaps Ba, Ba of the cardboard box B with the closed state.
[0037]
Next, as shown in FIG. 10, the bag hoisting mechanism 4 is driven to press the bag hoisting plates 30, 30 against both lower side surfaces of the cardboard box B lifted by the above-mentioned box elevating table 20, The flaps Ba, Ba of the cardboard box B and the inlet Fa of the packaging bag F covered with the flaps Bb, Bb are rolled up by the bag lifting plates 30, 30. At the same time, as shown in FIG. 11, the bag tensioning mechanism 5 is driven, and the upper end side of the packaging bag F rolled up by the bag lifting plates 30 is flattened by the bag tensioning rods 34, 34. And the flaps Ba, Ba of the cardboard box B are opened in the front-rear direction by the bag tension bars 34, 34, respectively. Thereafter, the left and right bag hoisting plates 30, 30 are returned to the initial position.
[0038]
Next, as shown in FIG. 12, pressurized air discharged from each of the left and right injection nozzles 51, 51 is blown onto both side surfaces of the packaging bag F tightened by the above-described bag tension bars 34, 34, Both sides of the packaging bag F rolled up above the flaps Bb, Bb of the cardboard box B are shifted to the center. As shown in FIG. 13, the bag pressing mechanism 6 is driven to insert the bag pressing plates 45 between the respective flaps Bb, Bb of the cardboard box B and both side surfaces of the packaging bag F. The respective flaps Ba, Ba of the cardboard box B are supported in an open state by the auxiliary rollers 47, 47 pivotally supported on the pressing plate 45 side.
[0039]
Next, as shown in FIG. 14, both side surfaces of the packaging bag F tightened by the above-described bag tensioning bars 34, 34 are pressed by the bag pressing plates 45, 45 and the bag pressing rollers 46, 46, and the packaging is performed. The upper surface side of the filling material (not shown) filled in the bag F is rolled while being leveled by the bag pressing rollers 46, 46, and unnecessary wrinkles on both sides of the packaging bag F are removed. Depressurize and press while stretching the shift. At the same time, due to the negative pressure of the venturi-type suction device 80, the atmosphere staying in the packaging bag F is sucked through the vent holes 34a, 34a of the bag tension bars 34, 34, and the upper end side of the packaging bag F is moved in the front-rear direction. The bag tension rods 34, 34 are lifted while keeping the tension.
[0040]
At this time, due to the negative pressure of the suction device 80, the atmosphere such as dust and dust discharged from the inlet Fa of the packaging bag F is suctioned from the dust collection duct 77 to collect and collect the dust. Dust and dust sucked from the bag tension rods 34 and 34 and the dust collection duct 77 are collected and collected by a stock unit (not shown) as appropriate.
[0041]
Next, after the bag tension rods 34, 34 are lifted and stopped at the height position where the input port Fa of the packaging bag F is held, the bag sealing mechanism 7 is driven as shown in FIG. The upper side surfaces of the packaging bag F tensioned by the bag tensioning rods 34, 34 are pressed by the heating head 50a and the receiving head 50b, and the heating head 50a and the receiving head 50b heat-weld the adhered portion of the packaging bag F. Completely seal. Alternatively, the heating head 50a and the receiving head 50b may melt the hot-melt adhesive applied to the upper surface of the packaging bag F facing the upper surface of the packaging bag F, and adhere the tightly adhered portion of the packaging bag F to completely seal.
[0042]
Next, after the bag pressing plates 45, 45 and the heating head 50a and the receiving head 50b are separated from both sides of the packaging bag F, as shown in FIG. By each bag tension rod 34,34In a flat stateThe upper end of the wrapped bag F, Turned in a parallel interval in which the flat packaging bag F is held.After inserting and holding between the two bag winding rods 61, 61, and returning the left and right bag pressing plates 45, 45 to the initial position, the two bag winding rods 61, 61 are removed. It descends while rotating, and winds the upper end side of the packaging bag F several times appropriately. At the same time, the above-mentioned bag tension bars 34, 34 are returned to the initial position. Thereafter, the two bag-wound rods 61, 61 are withdrawn from the wound portion of the packaging bag F and are retracted and returned to the initial position.
[0043]
Next, as shown in FIGS. 17 and 18, the bag insertion mechanism 8 is driven so that the bag insertion plates 72 and 72 are vertically attached to the front and rear portions of the cardboard box B placed on the box elevator 20 described above. After inserting and inserting the ears Bb, Bb of the packaging bag F wound by the bag winding rods 61 into the front and rear portions of the cardboard box B, two bag insertion plates 72, 72 is returned to the initial position.
[0044]
Thereafter, the box elevating mechanism 3 is driven to descend to place the cardboard box B placed on the box elevating table 20 on the box feed conveyor 2, and the cardboard box B is subjected to a box sealing step (not shown). The packaging bag F can be stored in the corrugated cardboard box B by conveying and supplying the flaps Ba, Ba and the flaps Bb, Bb of the corrugated cardboard box B.
[0045]
As described above, since the atmosphere remaining in the packaging bag F is evacuated and then hermetically sealed, the atmosphere containing dust and dust does not leak to the outside of the packaging bag F during the sealing operation. In addition, the working environment can be prevented from being deteriorated. In addition, the packaging bag F can be contracted to a size to be accommodated in the cardboard box B formed in a predetermined size, and the closing operation of the packaging bag F and the boxing operation of the cardboard box B can be easily performed. In addition, a sealing step can be directly connected to the subsequent stage of the sealing step to reduce the installation space of the entire apparatus.
[0046]
In addition, the packing bag F can be evacuated and sealed while being laid in the cardboard box B, so that labor can be saved and the efficiency can be improved, and the top side of the filler put into the packing bag F can be achieved. Can be performed in a state in which the cardboard box B for storing the packaging bag F can be downsized. Further, since the upper end side of the packaging bag F is tensioned in a flat state by the respective bag tensioning rods 34, 34, there is no need to tension the upper end side of the packaging bag F with the hands of the operator as in the conventional example. , The overall length can be shortened, and the cost can be reduced.
[0047]
In correspondence between the configuration of the present invention and the above-described embodiment,
The box of the present invention corresponds to the cardboard box B of the embodiment,
Similarly,
The bag corresponds to the packaging bag F,
Each bag tension member corresponds to each bag tension bar 34, 34And
eachThe bag-wound body corresponds to each bag-wound rod 61, 61,
The bag air release means corresponds to each of the bag tension rods 34, 34, the suction device 80, and the electromagnetic switching valve 81,
The bag sealing means corresponds to the bag sealing mechanism 7, the heating head 50a, and the receiving head 50b.Do
The present invention is not limited only to the configuration of the above embodiment.
[0048]
In the above-described embodiment, one air release hole 34a is formed in the bag tension bar 34 constituting the bag tension mechanism 5, but a plurality of air release holes 34a. Alternatively, a large-diameter vent hole 34a may be formed, and the amount of vent increases, thereby improving the venting efficiency.
[0049]
Further, the flaps Ba, Ba of the cardboard box B transported and stopped at the box stop position on the box feed conveyor 2 are opened in the front-rear direction, and the input port Fa of the packaging bag F laid on the cardboard box B is wound. For example, the flaps Bb, Bb of the cardboard box B conveyed to the box stop position on the box feed conveyor 2 are opened in the left-right direction, and the opening of the packaging bag F laid in the cardboard box B is opened. Fa may be wound.
[Brief description of the drawings]
FIG. 1 is a front view showing an arrangement state of each mechanism constituting a bag closing device.
FIG. 2 is a side view showing an arrangement state of each mechanism constituting the bag closing device.
FIG. 3 is a front view showing an arrangement state of each mechanism arranged on a box stop position side.
FIG. 4 is a plan view showing a box feeding conveyor and a bag raising mechanism.
FIG. 5 is a side view showing the structure of the bag pressing mechanism.
FIG. 6 shows a structure of a bag pressing mechanism.CorrectArea view.
FIG. 7 is a plan view showing the structure of the bag winding mechanism.
FIG. 8 is a rear view showing the structure of the bag winding mechanism.
FIG. 9 is a side view showing a box lifting operation by the box lifting mechanism.
FIG. 10 is a front view showing a bag raising operation by the bag raising mechanism.
FIG. 11 is a side view showing a bag tensioning operation by the bag tensioning mechanism.
FIG. 12 is a front view showing a state in which the packaging bag is shifted to the width.
FIG. 13 is a front view showing an air-bleeding operation and a wrinkle-removing operation by the bag pressing mechanism.
FIG. 14 is a front view showing a bag pressing operation by the bag pressing mechanism.
FIG. 15 is a front view showing a bag sealing operation by the bag sealing mechanism.
FIG. 16 is a side view showing a bag winding operation by the bag winding mechanism.
FIG. 17 is a side view showing a bag inserting operation by the bag inserting mechanism.
FIG. 18 is a side view showing a state where the packaging bag is inserted.
[Explanation of symbols]
B: Cardboard box
Ba, Bb ... flap
F… Packaging bag
Fa ... Inlet
Fb: Ear
1… Bag sealing device
2. Box feed conveyor
3. Box lifting mechanism
4… Bag hoisting mechanism
5. Bag tension mechanism
6… Bag pressing mechanism
7. Bag sealing mechanism
8… Bag winding mechanism
9… Bag insertion mechanism
20 ... Box elevator
30 ... bag hoisting plate
34 ... bag tension bar
34a ... vent hole
34b: Flexible tube
45 ... Bag pressing plate
46 ... Bag pressing roller
50a ... Heating head
50b ... receiving head
61 ... Bag-wrapped stick
72… Bag insertion board
80 ... Suction device
81 ... Solenoid switching valve

Claims

A bag closing device for closing an input port of a bag protruding upward from an open side peripheral portion of a box,
A pair of each bag tensioner inserted into the input port of the bag, and tensioning the bag in a flat state,
Bag degassing means for degassing the atmosphere remaining in the bag tensioned in a flat state by each bag tensioning body,
A pair of each bag winding body that holds the upper end side of the bag body tensioned in a flat state by each of the bag tension bodies from both sides,
A bag winding mechanism for lowering while rotating each of the pair of bag winding bodies,
A bag closing device comprising: a bag insertion plate for inserting ears of a bag wound by the pair of bag winding bodies into front and rear portions of a box .

The bag evacuating means, a bag tension member inserted into the bag body is formed in a hollow shape, and a vent hole is formed at the suction side end of the bag tension member,
2. The bag closing device according to claim 1, wherein a suction device for sucking an atmosphere is connected to the discharge-side end of the bag tensioning member.

Upper Symbol bags plugging of <br/> claim 1, further comprising a bag sealing means for airtightly joined state an upper side of the bag body tense flattened state by each bag tension member.