JP4163011B2

JP4163011B2 - Bag sealing device

Info

Publication number: JP4163011B2
Application number: JP2003010594A
Authority: JP
Inventors: 久典宮田
Original assignee: エスアイ精工株式会社
Priority date: 2003-01-20
Filing date: 2003-01-20
Publication date: 2008-10-08
Anticipated expiration: 2023-01-20
Also published as: JP2004224350A

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば段ボール紙製や厚紙製の箱体、合成樹脂製や金属製のケース等の上面開口形態を有する容器の開口側周縁部に被せられた袋体の口部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、上述の袋体を封鎖する装置としては、例えばダンボールケースの開口側周縁部（フラップ）に被せられた袋の開口部を、直立保持機構を構成する各引っ掛け体で捲上げ及び起立して、第１保持体及び第２保持体、折曲げ体で保持した後、袋内の空気を空気吸引パイプで吸い出し、袋の両側面を一対の脱気板により押圧して、袋内の空気を脱気する。且つ、脱気済み袋の開口部を一対の把持ロッドで挟持した後、一対の把持ロッドを降下させながら回転して、袋の開口部を巻回閉止する特許文献１の袋開口部封止装置がある。
【０００３】
【特許文献１】
特開昭５５−１３４００２号公報。
【０００４】
【発明が解決しようとする課題】
しかし、上述の袋開口部封止装置は、第１保持体及び第２保持体、折曲げ体により保持された袋の両側面を一対の脱気板で押圧して脱気した後、脱気済み袋の開口部を一対の把持ロッドで挟持して巻回閉止するので、袋内の空気を脱気する工程及び袋の開口部を巻回する工程に移動したり、一対の脱気板及び一対の把持ロッドを駆動するときにタイムロスが生じるため、一つの袋体の口部を封鎖するときに要する作業時間が長く、作業能率が悪い。且つ、一対の脱気板及び一対の把持ロッドを駆動する機構が必要であるため、装置全体の構成及び構造が複雑になるという問題点を有している。
【０００５】
この発明は上記問題に鑑み、容器の開口側周縁部に起立するフラップに被せられた袋体の口部を捲上げて略扁平状態に緊張した後、該容器の左右フラップを袋体両側面と対向する方向に折曲げて脱気及び抜気することにより、袋体の口部を封鎖するときに要する動作時間が大幅に短縮され、袋封鎖作業の省力化及び能力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】
この発明は、上面開口形態を有する容器の開口側周縁部に起立するフラップに被せられた袋体の口部を封鎖する袋封鎖装置であって、上記容器を搬送する容器送りコンベアと、上記容器送りコンベアの搬送方向に対して上下左右移動自在に設けられる一対の支持アームと、上記容器の開口側周縁部に起立するフラップに被せられた袋体の口部を捲上げる一対の袋捲上げ手段と、上記容器の前後縁部に起立するフラップを前後方向に対して折曲げ、上記袋捲上げ手段により捲上げられた袋体の口部を前後方向に対して略扁平状態に緊張する袋緊張手段と、上記容器の左右縁部に起立するフラップを、上記袋緊張手段により緊張された袋体両側面と対向する方向に折曲げる一対のフラップ折曲げ手段と、上記袋緊張手段により緊張された袋体の口部を略気密状態に密封する一対の袋密封手段とを備え、上記袋捲上げ手段と、上記フラップ折曲げ手段と、上記袋密封手段が上記支持アームに取り付けられる袋封鎖装置であることを特徴とする。
【０００７】
上述の容器は、例えば段ボール紙製や厚紙製の箱体、合成樹脂製や金属製のケース等で構成することができる。また、袋体は、例えば透明及び半透明に形成した合成樹脂フィルム製（ビニール製）の袋、合成樹脂で被覆され紙製の袋等で構成することができ、袋体の口部を外側に向けて二つ折り状態（ダブル折り状態）及び一つ折り状態（シングル折り状態）に折返して、容器の開口側周縁部に起立するフラップに被せることができる。また、袋捲上げ手段は、例えば捲上げ板や捲上げ棒、捲上げ枠、捲上げアーム、吸着子、粘着体等で構成することができる。また、袋緊張手段は、例えば中空又は中実の袋緊張棒や袋緊張板、袋緊張管等で構成することができる。また、フラップ折曲げ手段は、例えば略棒状や略板状、略線状の折曲げガイド、折曲げアーム、加圧エア等で構成することができる。また、袋密封手段は、例えば熱シールする加熱ヘッドや粘着テープ、粘着剤、留め金具、クリップ）等で構成することができる。
【０００８】
つまり、容器送りコンベアにより袋体の口部が被せられた容器を搬送し、容器の開口側周縁部に起立するフラップに被せられた袋体の口部を一対の支持アームに取り付けられた一対の袋捲上げ手段により捲上げた後、一対の袋捲上げ手段で捲上げられた袋体の口部を袋緊張手段により前後方向に対して略扁平状態に緊張及び保持すると共に、容器の左右縁部に起立するフラップを、一対のフラップ折曲げ手段により袋緊張手段で緊張された袋体両側面と対向する方向に折曲げて、袋体内部の空気を脱気及び抜気した後、袋緊張手段で緊張された袋体の口部を一対の袋密封手段により略気密状態に密封する。
【０００９】
実施の形態として、上記袋体両側面と対向する方向に折曲げられた容器の左右フラップを略鉛直状態に起立するフラップ起立手段（例えば側面から見て略三角形状の起立ガイド、フラップが起立される角度に斜設したガイドレール等）と、上記袋密封手段により密封された袋体の口部を容器の開口側周縁部よりも内側に押込むと共に、上記容器のフラップが内側に折畳み許容される状態に収容する袋押込み手段（例えば袋押込み板や袋押込み枠、袋押込み棒、袋押込みアーム等）を備えることができる。また、上記袋緊張手段を、上記袋体内部の空気が吸い出される機能（例えば吸気ブロワや真空ポンプ等の脱気装置）を備えた略中空断面形状を有する一対の袋緊張棒で構成することがでる。
【００１０】
【作用及び効果】
この発明によれば、容器の開口側周縁部に起立するフラップに被せられた袋体の口部を捲上げて略扁平状態に緊張した後、容器の左右フラップを袋体両側面と対向する方向に折曲げて脱気及び抜気するので、従来例のような袋体の両側面を一対の脱気板で押圧したり、一対の把持ロッドで挟持して巻回する動作及び工程が不要となり、脱気時及び封鎖時のタイムロスが少なく、一つの袋体の口部を封鎖するときに要する動作時間を大幅に短縮して、袋封鎖作業の省力化及び能力アップを図ることができる。且つ、一対の脱気板及び一対の把持ロッドを駆動する機構を設ける必要がなく、装置全体の構成及び構造を簡素化して、安価に製作することができる。
【００１１】
【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、容器の一例である箱体内部に敷設された袋体の口部を封鎖する作業に用いられる袋封鎖装置を示し、図１及び図２に於いて、この袋封鎖装置１０は、袋敷設済みの箱体Ｂを搬送方向（図中矢印方向）に向けて搬送する箱送りコンベア２０と、箱送りコンベア２０上に設定した待機区間ａ及び封鎖区間ｂ、押込み区間ｃに搬送された箱体Ｂを昇降する箱昇降装置３０と、箱体ＢのフラップＢａ，Ｂａ及びフラップＢｂ，Ｂｂに被せられた袋体Ｆの口部Ｆａを捲上げる袋捲上げ装置４０と、袋体Ｆの口部Ｆａを前後方向に緊張及び抜気する袋緊張装置５０と、袋緊張装置５０により緊張された袋体Ｆの口部Ｆａを略気密状態に密封する袋密封装置６０と、袋体Ｆの口部Ｆａを箱体Ｂ内部に収容する袋押込み装置７０とから構成される。
【００１２】
上述の箱体Ｂは、図３に示すように、上面側を開口した形態に製函及び組立てられ、フラップＢａ，Ｂａを短手側前後縁部に連設し、フラップＢｂ，Ｂｂを長手側左右縁部に連設している。且つ、透明又は半透明に形成した合成樹脂フィルム製の袋体Ｆを箱体Ｂ内部に敷設すると共に、袋体Ｆの口部Ｆａを外側に向けて二つ折り状態（ダブル折り状態）に折返して、箱体ＢのフラップＢａ，Ｂａ及びフラップＢｂ，Ｂｂに被せている。また、図４に示すように、袋体Ｆの口部Ｆａを一つ折り状態（シングル折り状態）に折返して被せてもよい。なお、袋体Ｆ内部には、例えば粉状原料や粒状原料等の充填物、防錆油塗布済みのボルトやナット等の金属部品を定量投入している。
【００１３】
前述の箱送りコンベア２０は、送りローラ２１…を、搬送路両側部に架設した取付け枠２２，２２間に対して搬送方向に所定間隔に隔てて軸架すると共に、減速機付き送り用モータ（図示省略）の駆動力により搬送方向に回転して、箱体Ｂを、装置前段の充填工程（図示省略）から装置後段の封函工程（図示省略）に向けて搬送する。
【００１４】
前述の箱昇降装置３０は、上述の箱送りコンベア２０を、様々なサイズ（高さ）を有する箱体Ｂに略対応して例えばネジ送り機構やチェーン機構等の昇降手段により上下動させ、箱体ＢのフラップＢａ，Ｂｂに被せられた袋体Ｆの口部Ｆａを後述する袋捲上げ装置４０により捲上げるのに適した高さ、略気密状態に密封された袋体Ｆの口部Ｆａを後述する袋押込み装置７０により箱体Ｂ内部に収容するのに適した高さ、搬入及び搬出するのに適した高さに昇降する。また、待機区間ａ及び封鎖区間ｂ、押込み区間ｃの箱送りコンベア２０を、箱昇降装置３０で独立して上下動することもできる。
【００１５】
前述の袋捲上げ装置４０は、図５、図７にも示すように、箱体ＢのフラップＢａ，Ｂａ及びフラップＢｂ，Ｂｂに被せられた袋体Ｆの口部Ｆａを捲上げる一対の捲上げユニット４１を、箱送りコンベア２０上の封鎖区間ｂ上部に架設した取付け枠４２に対して左右移動自在に取付け、取付け枠４２上部に張架したループ状のチェーン４３を一対の捲上げユニット４１に連結している。つまり、チェーン４３を、減速機付きモータ（図示省略）の駆動力により正逆回転して、一対の捲上げユニット４１を、箱送りコンベア２０による箱体Ｂの搬送動作及び袋緊張装置５０による袋体Ｆの緊張動作が許容される後退位置と、後述する一対の捲上げ板４７を箱体Ｂの両側面に近接及び押圧する中間位置と、後述する加熱ヘッド６１及び受けヘッド６３を袋緊張装置５０により緊張された袋体Ｆの口部Ｆａ両側面に押圧する前進位置とに左右移動する。
【００１６】
上述の捲上げユニット４１は、一対の可動台４４を、取付け枠４２に対して左右移動自在に取付け、昇降台４５を、可動台４４に対して上下移動自在に夫々取付け、可動台４４上部に立設した昇降シリンダ４６を昇降台４５に連結している。つまり、一対の昇降台４５を、昇降シリンダ４６の作動により略垂直方向に上下移動して、昇降台４５に取付けられた捲上げ板４７を、箱体ＢのフラップＢａ，Ｂｂに被せられた袋体Ｆの口部Ｆａよりも下方の降下位置と、箱体ＢのフラップＢａ，Ｂｂに被せられた袋体Ｆの口部Ｆａが捲上げられる上昇位置とに上下移動する。
【００１７】
且つ、一対の捲上げ板４７は、箱体ＢのフラップＢａ，Ｂｂに被せられた袋体Ｆの口部Ｆａを捲上げるのに適した大きさ及び形状、厚みに形成され、封鎖区間ｂに搬送された箱体ＢのフラップＢｂ，Ｂｂと対向して、搬送方向から見て左右昇降台４５の前面側中央部に固定した支持アーム４５ａに取付けている。また、袋捲上げ板４７の全体及び上端部を、箱体Ｂの側部外面部に対して斜め上向きに押付けられる角度に傾斜及び形状に形成してもよい。
【００１８】
前述の袋緊張装置５０は、図６にも示すように、略中空断面形状を有する一対の袋緊張棒５１を、箱送りコンベア２０上の封鎖区間ｂ上部に架設した昇降枠５２の下面側前後部に枢着し、昇降枠５２の前後端部に取付けた回動シリンダ５３のピストンロッドを袋緊張棒５１の基端部に連結している。且つ、取付け枠５４を昇降枠５２上部に架設すると共に、その取付け枠５４に立設した昇降シリンダ５５のピストンロッドを昇降枠５２に連結している。且つ、一対の袋緊張棒５１は、例えば吸気ブロワや真空ポンプ等の脱気装置（図示省略）に接続され、袋体Ｆ内部の雰囲気を強制的に脱気及び抜気する。
【００１９】
つまり、一対の袋緊張棒５１を、昇降シリンダ５５の作動により略垂直方向に昇降動作して、封鎖区間ｂに搬送された箱体ＢのフラップＢａ，Ｂａ間に挿入される降下位置と、フラップＢａ，Ｂａ間から引抜かれる上昇位置とに上下移動する。且つ、回動シリンダ５３の作動により搬送方向と略平行する方向（前後方向）に回動して、袋体Ｆの口部Ｆａ及び箱体ＢのフラップＢａ，Ｂａ間に挿入される閉角度と、箱体ＢのフラップＢａ，Ｂａを搬送方向と略平行する方向に対して略９０度に折曲げる開角度とに前後回動すると共に、上述の袋捲上げ装置４０により捲上げられた袋体Ｆの口部Ｆａを搬送方向（前後方向）に対して略扁平状態及び略直線状態に緊張する。
【００２０】
前述の袋密封装置６０は、図８及び図９にも示すように、加熱ヘッド６１を、搬送方向から見て左側昇降台４５を構成する支持アーム４５ａの先端側下部に取付けた進退シリンダ６２のピストンロッドに連結している。且つ、加熱ヘッド６１と対向する受けヘッド６３を、右側昇降台４５を構成する支持アーム４５ａの先端側下部に取付けた進退シリンダ６４のピストンロッドに連結している。つまり、進退シリンダ６２，６４を作動して、上述の袋緊張装置５０により緊張された袋体Ｆの口部Ｆａ両側面を加熱ヘッド６１及び受けヘッド６３で挟持して、加熱ヘッド６１の発熱作用により熱シールする。
【００２１】
且つ、箱体ＢのフラップＢｂ，Ｂｂが内側に折畳まれる大きさ及び形状に形成した一対の折曲げガイド６５を、封鎖区間ｂに搬送される箱体ＢのフラップＢｂ，Ｂｂと対向して、左右支持アーム４５ａの先端側最下段に取付けている。つまり、一対の折曲げガイド６５を、一対の捲上げユニット４１と一体的に左右移動させ、箱送りコンベア２０による箱体Ｂの搬送が許容される後退位置と、箱体ＢのフラップＢｂ，Ｂｂが内側に折畳まれる前進位置とに移動する。
【００２２】
且つ、図１０にも示すように、一対の折曲げガイド６５により折畳まれた箱体ＢのフラップＢｂ，Ｂｂが略鉛直状態に引き起こされる大きさ及び形状に形成（例えば側面から見て略三角形状）した一対の起立ガイド６６を、箱送りコンベア２０上の封鎖区間ｂと押込み区間ｃとの間の搬送路上部に配設している。
【００２３】
前述の袋押込み装置７０は、図１１にも示すように、箱体Ｂの上面側開口部と略対応する大きさ及び形状で、箱体Ｂ内部に対して挿入許容される大きさ及び形状に形成した袋押込み板７１を、箱送りコンベア２０上の押込み区間ｃ上部に架設した取付け枠７２に対して上下移動自在に垂設し、取付け枠７２に立設した昇降シリンダ７３のピストンロッドを袋押込み板７１に連結している。つまり、袋押込み板７１を、昇降シリンダ７３の作動により略垂直方向に昇降動作して、上述の袋密封装置６０により密封された袋体Ｆの口部Ｆａが箱体Ｂの開口側周縁部よりも内側に押込み収容される降下位置と、箱体Ｂの搬送が許容及び起立するフラップＢａ，Ｂｂに対して当接が回避される上昇位置とに上下移動する。なお、実施例のシリンダに代わり、例えばネジ送り機構やチェーン機構、カム機構、ソレノイド等の駆動手段を用いることもできる。
【００２４】
図示実施例は上記の如く構成するものにして、以下、袋封鎖装置１０により箱体Ｂ内部に敷設された袋体Ｆの封鎖動作を説明する。
【００２５】
先ず、図１及び図２に示すように、袋敷設済みの箱体Ｂ（図３参照）を、箱送りコンベア２０上の封鎖区間ｂに搬送及び停止させ、次の箱体Ｂを待機区間ａに待機させた後、箱昇降装置３０を駆動して、箱送りコンベア２０に載置された箱体Ｂを、袋体Ｆの口部Ｆａを捲上げ及び緊張するのに適した高さに持ち上げる。
【００２６】
次に、図５にも示すように、袋捲上げ装置４０を駆動して、一対の捲上げユニット４１を箱体Ｂの底部側外面部に近接させ、一対の捲上げ板４７を箱体Ｂの底部側外面部に近接及び押圧した後、一対の捲上げユニット４１を略鉛直方向に上昇移動させながら、一対の捲上げ板４７を箱体ＢのフラップＢｂ，Ｂｂと袋体Ｆの口部Ｆａとの対向隙間に挿入して、箱体ＢのフラップＢａ，Ｂｂに被せられた袋体Ｆの口部Ｆａを捲上げると共に、一対の捲上げユニット４１を、一対の折曲げガイド６５がフラップＢｂ，Ｂｂの下端側外面部に対して当接される高さに降下停止する。
【００２７】
且つ、袋体Ｆの口部Ｆａを捲上げるまえに、袋緊張装置５０を構成する一対の袋緊張棒５１を、箱体ＢのフラップＢａ，Ｂａ間に挿入される閉角位置に回動したまま降下位置に予め降下しておき、一対の捲上げ板４７により捲上げられる袋体Ｆの口部Ｆａ内部に挿入する。
【００２８】
次に、図６にも示すように、袋緊張装置５０を駆動して、一対の袋緊張棒５１を開角度に前後回動させ、箱体ＢのフラップＢａ，Ｂａを搬送方向と略平行する前後方向に折曲げた後、一対の袋緊張棒５１を、袋緊張棒５１の先端部が箱体Ｂの開口側周縁部と略水平となる高さに垂直降下して、箱体ＢのフラップＢａ，Ｂａを略水平及び略水平以上の角度に折曲げる。
【００２９】
且つ、上述の袋捲上げ装置４０により捲上げられた袋体Ｆの口部Ｆａを搬送方向（前後方向）に対して略扁平状態及び略直線状態に緊張し、袋体Ｆの開口側内壁面を互いに密着及び収容物（図示省略）上面に押付けて、袋体Ｆ内部の空気を脱気及び抜気する。同時に、袋緊張棒５１に接続された脱気装置の吸引力により強制的に脱気及び抜気する。
【００３０】
且つ、図７及び図８にも示すように、一対の袋緊張棒５１を、袋緊張棒５１の先端部が袋体Ｆの口部Ｆａに挿入及び係止される高さに上昇させながら、一対の捲上げユニット４１を袋体Ｆの口部Ｆａ両側面と対向する方向に移動して、箱体ＢのフラップＢｂ，Ｂｂを一対の折曲げガイド６５により内側に折曲げると共に、袋体Ｆの開口側内壁面を収容物（図示省略）上面に押付け、袋体Ｆの開口側内壁面を互いに密着させて、袋体Ｆ内部の空気を脱気及び抜気する。
【００３１】
続いて、図９にも示すように、袋密封装置６０の加熱ヘッド６１及び受けヘッド６３を、一対の袋緊張棒５１の先端部が挿入された部分よりも下位に位置する袋体Ｆの口部Ｆａ両側面に押付けて、袋体Ｆの口部Ｆａを加熱ヘッド６１の発熱作用により略気密状態に熱シールする。この後、一対の捲上げユニット４１を離間方向に後退移動させ、一対の袋緊張棒５１を閉角度に回動し、袋体Ｆの口部Ｆａから抜き取って初期位置に上昇復帰させる。
【００３２】
次に、密封済みの袋体Ｆが敷設された箱体Ｂを、箱送りコンベア２０上の押込み区間ｃに搬送する途中において、図１０にも示すように、一対の折曲げガイド６５で折畳まれた箱体ＢのフラップＢｂ，Ｂｂを、一対の起立ガイド６６に沿って略鉛直状態に引き起こし、箱送りコンベア２０上の押込み区間ｃに搬送及び停止する。また、箱体ＢのフラップＢａ，Ｂａを略鉛直状態に引き起こしてもよい。
【００３３】
次に、図１１にも示すように、袋押込み装置７０を駆動して、袋押込み板７１を箱体Ｂ内部に対して略垂直に挿入すると共に、密封済み袋体Ｆの口部Ｆａを箱体Ｂの開口側周縁部よりも内側に押込み、フラップＢａ，Ｂｂが内側に折畳み許容される状態（例えば箱体Ｂの開口側周縁部と略水平となる状態）に収容する。この後、袋押込み板７１を箱体Ｂ内部から抜き取って初期位置に復帰させ、袋押込み済みの箱体Ｂを封函工程に搬送して封函処理する。以下、上述と同様にして、袋体Ｆの封鎖作業を継続して行う。
【００３４】
以上のように、箱体Ｂの開口側周縁部に起立するフラップＢａ，Ｂａ，Ｂｂ，Ｂｂに被せられた袋体Ｆの口部Ｆａを、袋捲上げ装置４０を構成する一対の捲上げ板４７で捲上げて、袋緊張装置５０を構成する一対の袋緊張棒５１で略扁平状態に緊張した後、箱体Ｂの左右フラップＢｂ，Ｂｂを袋体Ｆ両側面と対向する方向に折曲げて脱気及び抜気するので、従来例のような袋体の両側面を一対の脱気板で押圧したり、一対の把持ロッドで挟持して巻回する動作及び工程が不要となり、脱気時及び封鎖時のタイムロスが少なく、一つの袋体Ｆの口部Ｆａを封鎖するときに要する動作時間を大幅に短縮して、袋封鎖作業の省力化及び能力アップを図ることができる。且つ、一対の脱気板及び一対の把持ロッドを駆動する機構を設ける必要がなく、装置全体の構成及び構造を簡素化して、安価に製作することができる。
【００３５】
且つ、袋体Ｆの口部Ｆａを緊張したまま密封するので、従来例のように袋体の口部を巻回するよりも、袋体Ｆの全長を短くすることができ、一つの袋体Ｆを製造するときの単価及び収容物を包装するときの包装コストの低減を図ることができる。
【図面の簡単な説明】
【図１】袋封鎖装置による箱体に敷設された袋体の封鎖動作を示す側面図。
【図２】袋捲上げ装置の袋捲上げ動作を示す正面図。
【図３】袋体の口部を二つ折り状態に被せた例を示す斜視図。
【図４】袋体の口部を一つ折り状態に被せた他の例を示す斜視図。
【図５】袋捲上げ装置による袋捲上げ動作を示す正面図。
【図６】袋緊張装置による袋緊張動作を示す側面図。
【図７】袋緊張装置及び袋捲上げ装置による抜気動作を示す正面図。
【図８】袋体の緊張状態及びフラップの折曲げ状態を示す斜視図。
【図９】袋密封装置による袋密封動作を示す正面図。
【図１０】起立ガイドによる箱体のフラップ起立動作を示す側面図。
【図１１】袋押込み装置による袋押込み動作を示す側面図。
【符号の説明】
Ｂ…箱体
Ｂａ，Ｂｂ…フラップ
Ｆ…袋体
Ｆａ…口部
１０…袋封鎖装置
２０…箱送りコンベア
４０…袋捲上げ装置
４１…捲上げユニット
４７…捲上げ板
５０…袋緊張装置
５１…袋緊張棒
６０…袋密封装置
６１…加熱ヘッド
６５…折曲げガイド
６６…起立ガイド
７０…袋押込み装置
７１…袋押込み板[0001]
BACKGROUND OF THE INVENTION
This invention is used for, for example, a process of sealing a mouth portion of a bag body covered with a peripheral edge portion on an opening side of a container having an upper surface opening shape such as a box made of corrugated cardboard or cardboard, or a case made of synthetic resin or metal. The present invention relates to a bag sealing device to be used.
[0002]
[Prior art]
Conventionally, as an apparatus for sealing the above-described bag body, for example, the opening portion of the bag covered with the opening side peripheral portion (flap) of the cardboard case is raised and raised by each hook body constituting the upright holding mechanism. After holding the first holding body, the second holding body, and the folded body, the air in the bag is sucked out by an air suction pipe, and both sides of the bag are pressed by a pair of deaeration plates to Deaerate. And the bag opening part sealing device of patent document 1 which rolls and closes the opening part of a bag by rotating while lowering a pair of holding rods after pinching the opening part of a deaerated bag with a pair of holding rods There is.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 55-134002.
[0004]
[Problems to be solved by the invention]
However, the bag opening sealing device described above is degassed after pressing both side surfaces of the bag held by the first holding body, the second holding body, and the folded body with a pair of degassing plates. Since the opening of the used bag is clamped by a pair of gripping rods and wound and closed, the process moves to a step of degassing the air in the bag and a step of winding the opening of the bag, or a pair of deaeration plates and Since time loss occurs when driving the pair of grip rods, the work time required to seal the mouth of one bag body is long, and the work efficiency is poor. In addition, since a mechanism for driving the pair of deaeration plates and the pair of gripping rods is necessary, there is a problem that the configuration and structure of the entire apparatus are complicated.
[0005]
In view of the above problems, the present invention raises the mouth of the bag body that is put on the flap that stands on the peripheral edge of the opening side of the container and tensions it in a substantially flat state. By folding in the opposite direction and deaeration and evacuation, the operation time required for sealing the mouth of the bag body is greatly shortened, saving the bag sealing work and increasing the capacity The purpose is to provide a sealing device.
[0006]
[Means for Solving the Problems]
The present invention relates to a bag sealing device for sealing a mouth of a bag body that is covered with a flap standing on an opening side peripheral portion of a container having an upper surface opening configuration, the container feeding conveyor for transporting the container, and the container A pair of bag lifting means that lifts up the mouth of the bag that is placed on the flap that stands on the opening side peripheral edge of the container, and a pair of support arms that can be moved vertically and horizontally with respect to the conveying direction of the feed conveyor. And a bag tension that bends the flaps standing on the front and rear edges of the container in the front-rear direction and tensions the mouth of the bag body raised by the bag lifting means in a substantially flat state in the front-rear direction. Means, a pair of flap folding means for folding the flaps standing on the left and right edges of the container in a direction opposite to both side surfaces of the bag body tensioned by the bag tension means, and tensioned by the bag tension means Mouth of bag The a pair of bag sealing means for sealing a substantially airtight state, the features and the bag winding up means, and the flap folding means, that the bag sealing means is a bag plugging attached to the support arm To do.
[0007]
The above-mentioned container can be constituted by, for example, a corrugated cardboard or cardboard box, a synthetic resin or metal case. In addition, the bag body can be composed of, for example, a synthetic resin film (vinyl) bag formed transparent and translucent, a paper bag coated with a synthetic resin, and the mouth portion of the bag body on the outside. It can be folded back into a double-folded state (double-folded state) and a single-folded state (single-folded state), and can be put on a flap that stands on the opening side peripheral edge of the container. Further, the bag lifting means can be constituted by, for example, a lifting plate, a lifting rod, a lifting frame, a lifting arm, an adsorber, an adhesive, and the like. The bag tension means can be constituted by, for example, a hollow or solid bag tension bar, a bag tension plate, a bag tension tube, or the like. Further, the flap folding means can be composed of, for example, a substantially rod-like, substantially plate-like, or substantially linear folding guide, a folding arm, pressurized air, or the like. Further, the bag sealing means can be constituted by, for example, a heat head for heat sealing, an adhesive tape, an adhesive, a fastener, a clip) or the like.
[0008]
That is, a container feeding conveyor conveys a container covered with a mouth portion of a bag body, and a pair of bag mouth portions covered with flaps standing on the opening side peripheral edge portion of the container are attached to a pair of support arms. After lifting by the bag lifting means, the mouth of the bag body raised by the pair of bag lifting means is tensioned and held in a substantially flat state with respect to the front-rear direction by the bag tensioning means, and the left and right edges of the container Folding the flaps that stand up at the part in a direction opposite to both sides of the bag body that has been tensioned by the bag tensioning means by a pair of flap folding means, degassing and venting the air inside the bag body, then bag tensioning The mouth portion of the bag body that is tensioned by the means is sealed in a substantially airtight state by a pair of bag sealing means.
[0009]
As an embodiment, a flap standing means (for example, a substantially triangular standing guide or flap as viewed from the side is raised) that raises the left and right flaps of the container folded in a direction facing both side surfaces of the bag body in a substantially vertical state. The guide rail inclined at an angle, etc.) and the opening of the bag body sealed by the bag sealing means inside the opening side peripheral edge of the container, and the flap of the container is allowed to fold inside. A bag pushing means (for example, a bag pushing plate, a bag pushing frame, a bag pushing bar, a bag pushing arm, etc.) for accommodating the machine in a state to be stored can be provided. Further, the bag tensioning means is constituted by a pair of bag tensioning rods having a substantially hollow cross-sectional shape having a function (for example, a deaeration device such as an intake blower or a vacuum pump) for sucking out air inside the bag body. I get out.
[0010]
[Action and effect]
According to this invention, after the mouth of the bag body covered with the flap standing on the opening side peripheral edge portion of the container is lifted and tensioned in a substantially flat state, the left and right flaps of the container are opposed to both side surfaces of the bag body. Since it is degassed and evacuated by folding it, the operation and process of pressing both sides of the bag body with a pair of deaeration plates or sandwiching and winding with a pair of gripping rods as in the conventional example becomes unnecessary. The time loss at the time of deaeration and sealing is small, and the operation time required for sealing the mouth of one bag body can be greatly shortened, so that the bag sealing work can be labor-saving and the capacity can be increased. In addition, it is not necessary to provide a mechanism for driving the pair of deaeration plates and the pair of gripping rods, and the configuration and structure of the entire apparatus can be simplified and manufactured at low cost.
[0011]
【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 the operation of sealing a mouth portion of a bag laid inside a box as an example of a container. In FIGS. 1 and 2, this bag sealing device 10 is a bag. A box feed conveyor 20 that transports the laid box B in the transport direction (in the direction of the arrow in the figure), and a box that is transported to the standby section a, the blocking section b, and the pushing section c set on the box feed conveyor 20 A box lifting and lowering device 30 that lifts and lowers the body B, a bag lifting device 40 that lifts up the mouth portion Fa of the bag body F covered with the flaps Ba and Ba and the flaps Bb and Bb of the box body B, and the mouth of the bag body F A bag tensioning device 50 that tensions and evacuates the portion Fa in the front-rear direction, a bag sealing device 60 that seals the mouth portion Fa of the bag body F strained by the bag tensioning device 50 in a substantially airtight state, and a mouth of the bag body F It is comprised from the bag pushing-in apparatus 70 which accommodates the part Fa in the box B inside.
[0012]
As shown in FIG. 3, the box body B is boxed and assembled in an open shape on the upper surface side, the flaps Ba and Ba are connected to the short side front and rear edges, and the flaps Bb and Bb are on the long side. It is connected to the left and right edges. In addition, the bag body F made of a synthetic resin film formed to be transparent or translucent is laid in the box body B, and the bag body F is folded in a double folded state with the mouth Fa facing outward. The flaps Ba and Ba and the flaps Bb and Bb of the box B are covered. Further, as shown in FIG. 4, the mouth portion Fa of the bag body F may be folded back into a single folded state (single folded state). In addition, in the bag body F, for example, fillers such as powdery raw materials and granular raw materials, and metal parts such as bolts and nuts coated with rust preventive oil are quantitatively charged.
[0013]
The above-mentioned box feed conveyor 20 has feed rollers 21... Mounted between the mounting frames 22, 22 installed on both sides of the transport path at a predetermined interval in the transport direction, and a feed motor with a speed reducer ( The box B is rotated in the transport direction by a driving force (not shown), and is transported from the filling process (not shown) at the front stage of the apparatus toward the sealing process (not shown) at the rear stage of the apparatus.
[0014]
The above-described box lifting device 30 moves the above-described box feeding conveyor 20 up and down by lifting means such as a screw feeding mechanism and a chain mechanism substantially corresponding to the box body B having various sizes (heights). The mouth portion Fa of the bag body F sealed to a height and a substantially airtight state suitable for lifting the mouth portion Fa of the bag body F covered with the flaps Ba and Bb of the body B by a bag lifting device 40 described later. Is raised and lowered to a height suitable for being accommodated inside the box B by a bag pushing device 70 described later, and a height suitable for carrying in and out. Further, the box feeding conveyor 20 in the waiting section a, the blocking section b, and the pushing section c can be moved up and down independently by the box lifting device 30.
[0015]
As shown in FIGS. 5 and 7, the above-described bag lifting device 40 includes a pair of bags for lifting the flaps Ba and Ba of the box B and the mouth Fa of the bag F that covers the flaps Bb and Bb. The raising unit 41 is attached to the attachment frame 42 installed on the upper part of the blocking section b on the box feed conveyor 20 so as to be movable left and right, and a loop chain 43 stretched on the upper part of the attachment frame 42 is attached to the pair of raising units 41. It is linked to. That is, the chain 43 is rotated in the forward and reverse directions by a driving force of a motor with a reduction gear (not shown), and the pair of lifting units 41 are transported by the box-feeding conveyor 20 to transport the box body B and the bag tensioning device 50 has a bag. A bag tensioning device that includes a retracted position where the tensioning operation of the body F is allowed, an intermediate position where a pair of lifting plates 47 described later are brought close to and pressed on both side surfaces of the box B, and a heating head 61 and a receiving head 63 described later. It moves right and left to the forward position pressed against both sides of the mouth Fa of the bag body F that is tensioned by 50.
[0016]
The above-described lifting unit 41 has a pair of movable bases 44 attached to the attachment frame 42 so as to be movable left and right, and a lifting base 45 attached to the movable base 44 so as to be movable up and down. A vertically installed lifting cylinder 46 is connected to the lifting platform 45. That is, a bag in which a pair of lifting platforms 45 are moved up and down in a substantially vertical direction by the operation of the lifting cylinder 46, and the lifting plate 47 attached to the lifting platform 45 is covered with the flaps Ba and Bb of the box B. and a lowered position below the mouth portion F a body F, to move up and down and the flap Ba, raised position mouth F a of the bag body F that is covered in Bb is increased winding of the box B.
[0017]
The pair of lifting plates 47 are formed in a size, shape, and thickness suitable for lifting the mouth portion Fa of the bag body F covered with the flaps Ba and Bb of the box B, and are formed in the sealing section b. Opposite to the flaps Bb, Bb of the transported box B, it is attached to a support arm 45a fixed to the front side center of the left and right lifting platform 45 as viewed from the transport direction. Moreover, you may form the whole and the upper end part of the bag raising board 47 in the inclination and the shape in the angle pressed diagonally upward with respect to the side part outer surface part of the box B.
[0018]
As shown in FIG. 6, the bag tensioning device 50 described above includes a pair of bag tensioning rods 51 having a substantially hollow cross-sectional shape, and the front and back sides of the lifting frame 52 constructed on the upper part of the sealing section b on the box feed conveyor 20. The piston rod of the rotation cylinder 53 attached to the front and rear end portions of the lifting frame 52 is connected to the proximal end portion of the bag tensioning rod 51. The mounting frame 54 is installed on the upper part of the lifting frame 52, and the piston rod of the lifting cylinder 55 erected on the mounting frame 54 is connected to the lifting frame 52. Further, the pair of bag tension bars 51 are connected to a deaeration device (not shown) such as an intake blower or a vacuum pump, forcibly degassing and evacuating the atmosphere inside the bag body F.
[0019]
That is, the pair of bag tension bars 51 are moved up and down in the substantially vertical direction by the operation of the lifting cylinder 55, and the lowered position inserted between the flaps Ba and Ba of the box B conveyed to the sealing section b, and the flaps. It moves up and down to the ascending position withdrawn from between Ba and Ba. Further, the rotation angle of the bag body F and the flaps Ba and Ba of the box body B, which are rotated in a direction (front-rear direction) substantially parallel to the transport direction by the operation of the rotation cylinder 53, The bag body is rotated back and forth to an opening angle at which the flaps Ba, Ba of the box body B are bent at approximately 90 degrees with respect to the direction substantially parallel to the transport direction, and is raised by the bag raising device 40 described above. The mouth Fa of the F is strained in a substantially flat state and a substantially straight state with respect to the transport direction (front-rear direction).
[0020]
As shown in FIGS. 8 and 9, the bag sealing device 60 described above includes a forward / backward cylinder 62 in which the heating head 61 is attached to the lower end on the front end side of the support arm 45 a that constitutes the left lifting platform 45 when viewed from the transport direction. It is connected to the piston rod. In addition, the receiving head 63 facing the heating head 61 is connected to a piston rod of an advancing / retreating cylinder 64 attached to the lower end on the front end side of the support arm 45a constituting the right lifting platform 45. In other words, the advancing / retreating cylinders 62 and 64 are actuated so that the both sides of the mouth portion Fa of the bag body F that has been tensioned by the above-described bag tensioning device 50 are sandwiched between the heating head 61 and the receiving head 63. To heat seal.
[0021]
Further, the pair of folding guides 65 formed in a size and a shape in which the flaps Bb and Bb of the box B are folded inward are opposed to the flaps Bb and Bb of the box B conveyed to the sealing section b. The left and right support arms 45a are attached to the lowermost stage on the tip side. That is, the pair of folding guides 65 are moved to the left and right integrally with the pair of lifting units 41 so that the box B is allowed to be conveyed by the box feed conveyor 20 and the flaps Bb and Bb of the box B Move to the forward position where it is folded inward.
[0022]
Further, as shown in FIG. 10, the flaps Bb and Bb of the box B folded by the pair of bending guides 65 are formed in a size and shape that are caused to be in a substantially vertical state (for example, substantially triangular as viewed from the side). A pair of upright guides 66 having a shape are disposed on the upper part of the conveyance path between the blocking section b and the pushing section c on the box feed conveyor 20.
[0023]
As shown in FIG. 11, the above-described bag pushing device 70 has a size and shape substantially corresponding to the opening on the upper surface side of the box B, and has a size and shape that is allowed to be inserted into the inside of the box B. The formed bag pushing plate 71 is vertically suspended with respect to the mounting frame 72 installed on the upper portion of the pushing section c on the box feed conveyor 20, and the piston rod of the elevating cylinder 73 standing on the mounting frame 72 is bagged. The push plate 71 is connected. That is, the bag pushing plate 71 is moved up and down in the substantially vertical direction by the operation of the lifting cylinder 73 so that the mouth portion Fa of the bag body F sealed by the above-described bag sealing device 60 is closer to the opening side peripheral portion of the box body B. Also, it moves up and down between a lowered position where it is pushed in and accommodated and a raised position where contact with the flaps Ba, Bb where the conveyance of the box B is allowed and upright is avoided. In place of the cylinder of the embodiment, driving means such as a screw feed mechanism, a chain mechanism, a cam mechanism, and a solenoid can be used.
[0024]
The illustrated embodiment is configured as described above, and the sealing operation of the bag body F laid inside the box body B by the bag sealing device 10 will be described below.
[0025]
First, as shown in FIGS. 1 and 2, the box B (see FIG. 3) that has been laid is transported and stopped to the blocking section b on the box feed conveyor 20, and the next box B is moved to the standby section a. Then, the box lifting device 30 is driven to lift the box B placed on the box feed conveyor 20 to a height suitable for lifting and tensioning the mouth Fa of the bag F. .
[0026]
Next, as shown in FIG. 5, the bag lifting device 40 is driven to bring the pair of lifting units 41 close to the outer surface of the bottom side of the box B, and the pair of lifting plates 47 are moved to the box B. After the pair of hoisting units 41 are moved up and down in a substantially vertical direction, the pair of hoisting plates 47 are moved to the flaps Bb and Bb of the box B and the mouth of the bag F. insert the opposing gap between fa, flap Ba of the box B, with increasing winding a mouth F a of the bag body F that is covered in Bb, the pair of winding-up unit 41, a pair of folding guides 65 The flaps Bb and Bb are lowered and stopped at a height at which they are brought into contact with the lower end side outer surface portion.
[0027]
In addition, before lifting up the mouth Fa of the bag body F, the pair of bag tensioning bars 51 constituting the bag tensioning device 50 are rotated to the closed angle position inserted between the flaps Ba and Ba of the box B. It remains lowered position in advance drops, inserted inside the mouth portion F a of the bag body F to be wound up by a pair of winding-up plate 47.
[0028]
Next, as shown in FIG. 6, the bag tensioning device 50 is driven to rotate the pair of bag tensioning bars 51 back and forth to the open angle, so that the flaps Ba and Ba of the box B are substantially parallel to the transport direction. After bending in the front-rear direction, the pair of bag tension bars 51 are vertically lowered to a height at which the front end of the bag tension bar 51 is substantially horizontal with the opening side peripheral edge of the box B, and the flap of the box B Ba and Ba are bent at an angle of substantially horizontal and substantially horizontal.
[0029]
Further, the opening Fa of the bag body F is tensioned in a substantially flat state and a substantially straight state with respect to the conveying direction (front-rear direction) of the mouth portion Fa of the bag body F lifted by the bag lifting device 40 described above. Are pressed against each other and the upper surface of the container (not shown) to deaerate and vent the air inside the bag F. At the same time, the air is forcibly deaerated and evacuated by the suction force of the deaerator connected to the bag tension bar 51.
[0030]
And as shown also in FIG.7 and FIG.8, raising a pair of bag tension | tensile_strength stick 51 to the height in which the front-end | tip part of the bag tension | tensile_strength stick 51 is inserted and latched in the opening part Fa of the bag body F, The pair of lifting units 41 is moved in a direction opposite to both side faces of the mouth Fa of the bag F, and the flaps Bb and Bb of the box B are folded inward by the pair of folding guides 65, and the bag F The opening side inner wall surface is pressed against the upper surface of the container (not shown), the opening side inner wall surface of the bag body F is brought into close contact with each other, and the air inside the bag body F is deaerated and vented.
[0031]
Subsequently, as shown in FIG. 9, the heating head 61 and the receiving head 63 of the bag sealing device 60 are provided at the mouth of the bag body F positioned below the portion into which the distal ends of the pair of bag tension bars 51 are inserted. By pressing against both side faces of the part Fa, the mouth part Fa of the bag body F is heat-sealed in a substantially airtight state by the heating action of the heating head 61. Thereafter, the pair of lifting units 41 are moved backward in the separating direction, the pair of bag tension bars 51 are rotated to the closed angle, and are pulled out from the mouth portion Fa of the bag body F and returned to the initial position.
[0032]
Next, as shown in FIG. 10, the box body B on which the sealed bag body F is laid is conveyed to the pushing section c on the box feed conveyor 20, and is folded by a pair of folding guides 65. The flaps Bb and Bb of the box B are raised in a substantially vertical state along the pair of standing guides 66, and are conveyed and stopped in the pushing section c on the box feed conveyor 20. Further, the flaps Ba, Ba of the box B may be caused to be in a substantially vertical state.
[0033]
Next, as shown in FIG. 11, the bag pushing device 70 is driven to insert the bag pushing plate 71 substantially perpendicular to the inside of the box B, and the mouth Fa of the sealed bag F is placed in the box. The body B is pushed inward from the opening side peripheral edge of the body B, and accommodated in a state in which the flaps Ba and Bb are allowed to be folded inside (for example, a state that is substantially horizontal with the opening side peripheral edge of the box B). Thereafter, the bag pushing plate 71 is pulled out from the inside of the box B and returned to the initial position, and the box B that has been pushed into the bag is conveyed to a sealing process and sealed. Thereafter, the bag F is continuously sealed in the same manner as described above.
[0034]
As described above, the pair of hoisting plates constituting the bag hoisting device 40 includes the mouth portion Fa of the bag body F that covers the flaps Ba, Ba, Bb, and Bb standing on the opening side peripheral portion of the box B. 47, the pair of bag tensioning rods 51 constituting the bag tensioning device 50 are tensioned in a substantially flat state, and then the left and right flaps Bb and Bb of the box B are folded in a direction opposite to both sides of the bag F. Therefore, the operation and process of pressing both sides of the bag body with a pair of deaeration plates or sandwiching and winding with a pair of gripping rods as in the conventional example are unnecessary, and the deaeration is performed. Time loss at the time of sealing and sealing is small, the operation time required for sealing the mouth portion Fa of one bag body F can be greatly shortened, and labor saving and capacity improvement of the bag sealing work can be achieved. In addition, it is not necessary to provide a mechanism for driving the pair of deaeration plates and the pair of gripping rods, and the configuration and structure of the entire apparatus can be simplified and manufactured at low cost.
[0035]
In addition, since the mouth Fa of the bag F is sealed while being tensioned, the overall length of the bag F can be shortened compared to the case of winding the mouth of the bag as in the conventional example, and one bag The unit price for manufacturing F and the packaging cost for packaging the contents can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a sealing operation of a bag laid on a box by a bag sealing device.
FIG. 2 is a front view showing a bag lifting operation of the bag lifting device.
FIG. 3 is a perspective view showing an example in which the mouth of the bag body is folded in two.
FIG. 4 is a perspective view showing another example in which the mouth portion of the bag body is put in a folded state.
FIG. 5 is a front view showing a bag lifting operation by the bag lifting device.
FIG. 6 is a side view showing bag tensioning operation by the bag tensioning device.
FIG. 7 is a front view showing an evacuation operation by the bag tensioning device and the bag lifting device.
FIG. 8 is a perspective view showing a tension state of the bag body and a folded state of the flap.
FIG. 9 is a front view showing a bag sealing operation by the bag sealing device.
FIG. 10 is a side view showing the flap standing operation of the box body by the standing guide.
FIG. 11 is a side view showing a bag pushing operation by the bag pushing device.
[Explanation of symbols]
B ... Box Ba, Bb ... Flap F ... Bag body Fa ... Mouth part 10 ... Bag sealing device 20 ... Box feed conveyor 40 ... Bag lifting device 41 ... Lifting unit 47 ... Lifting plate 50 ... Bag tensioning device 51 ... Bag tension bar 60 ... Bag sealing device 61 ... Heating head 65 ... Bending guide 66 ... Standing guide 70 ... Bag pushing device 71 ... Bag pushing plate

Claims

A bag sealing device for sealing a mouth of a bag body covered with a flap standing on a peripheral edge of an opening side of a container having an upper surface opening configuration,
A container feed conveyor for transporting the containers;
A pair of support arms provided to be movable up and down and left and right with respect to the transport direction of the container feed conveyor;
A pair of bag lifting means that lifts the mouth of the bag body that is covered with the flap that stands on the opening side peripheral edge of the container;
Bag tensioning means for bending the flaps standing on the front and rear edges of the container with respect to the front-rear direction and tensioning the mouth of the bag body raised by the bag lifting means in a substantially flat state with respect to the front-rear direction; ,
A pair of flap folding means for folding the flaps standing on the left and right edges of the container in a direction opposite to both side surfaces of the bag body tensioned by the bag tension means;
A pair of bag sealing means for sealing the mouth of the bag body that has been tensioned by the bag tension means in a substantially airtight state ,
The bag sealing apparatus, wherein the bag lifting means, the flap folding means, and the bag sealing means are attached to the support arm .

Flap standing means for raising the left and right flaps of the container folded in a direction facing the both side surfaces of the bag body in a substantially vertical state;
A bag pushing means for pushing the mouth portion of the bag body sealed by the bag sealing means inside the opening side peripheral edge portion of the container and accommodating the flap of the container in a state in which the flap is allowed to be folded inside. Item 14. A bag sealing device according to Item 1.

The bag sealing apparatus according to claim 1, wherein the bag tension means is constituted by a pair of bag tension bars having a substantially hollow cross-sectional shape having a function of sucking out air inside the bag body.