JP2004224350A

JP2004224350A - Bag sealing device

Info

Publication number: JP2004224350A
Application number: JP2003010594A
Authority: JP
Inventors: Hisanori Miyata; 久典宮田
Original assignee: Ishii Corp
Current assignee: Ishii Corp
Priority date: 2003-01-20
Filing date: 2003-01-20
Publication date: 2004-08-12
Anticipated expiration: 2023-01-20
Also published as: JP4163011B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag sealing device capable of saving the bag sealing work and enhancing the capacity by shortening the operation time required to seal a mouth portion of a bag. <P>SOLUTION: A mouth portion Fa of a bag F covered on flaps Ba, Ba, Bb and Bb erected from a peripheral edge portion on the opening side of a box B is turned up by a pair of takeup plates 47 to constitute a bag takeup device 40, and pulled in a substantially flat state in the longitudinal direction by a pair of bag pulling bars 51 to constitute a bag pulling device 50. The right and left flaps Bb and Bb of the box B are folded in the direction facing both side surfaces of the bag F by a pair of folding guides 65, and air inside the bag F is discharged and removed. The mouth portion Fa of the bag F pulled by the pair of bag pulling bars 51 is held by a heating head 61 and a receiving head 63 of the bag sealing device 60, and heat-sealed in a substantially airtight state. <P>COPYRIGHT: (C)2004,JPO&NCIPI

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袋密封手段とを備えた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袋捲上げ手段により捲上げた後、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、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Ｂａ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Ｂａ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Ｂａ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Ｂａ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]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an operation for closing a mouth portion of a bag body covered on an opening side peripheral portion of a container having an upper surface opening form, such as a box made of corrugated paper or cardboard, a case made of synthetic resin or a metal, or the like. The present invention relates to a bag closing device used.
[0002]
[Prior art]
Conventionally, as an apparatus for closing the above-mentioned bag, for example, the opening of the bag covered on the opening side peripheral portion (flap) of the cardboard case is wound up 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 with an air suction pipe, and both side surfaces of the bag are pressed by a pair of deaeration plates to remove the air in the bag. Degas. Further, after the opening of the degassed bag is sandwiched by a pair of gripping rods, the pair of gripping rods are rotated while being lowered to wind and close the opening of the bag. There is.
[0003]
[Patent Document 1]
JP-A-55-134002.
[0004]
[Problems to be solved by the invention]
However, the above-described bag opening portion sealing device degass by pressing both sides of the bag held by the first holding body, the second holding body, and the bent body with a pair of degassing plates, and then degassing. Since the opening of the finished bag is sandwiched between a pair of gripping rods and closed by winding, the process moves to a step of evacuating the air in the bag and a step of winding the opening of the bag, or a pair of deaeration plates and Since a time loss occurs when the pair of gripping rods are driven, the work time required for closing the mouth of one bag is long, and the work efficiency is poor. Further, since a mechanism for driving the pair of deaeration plates and the pair of gripping rods is required, 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 a bag covered by a flap standing upright on the opening side peripheral portion of a container and tensions the bag in a substantially flat state. By folding in the opposite direction to deaerate and evacuate, the operation time required for closing the mouth of the bag is greatly reduced, and a bag capable of saving labor and increasing capacity in bag closing operation. The purpose is to provide a sealing device.
[0006]
[Means for Solving the Problems]
The present invention relates to a bag closing device for closing a mouth portion of a bag body covered by a flap rising on an opening side peripheral portion of a container having an upper surface opening form, wherein the flap rising on the opening side peripheral portion of the container is provided. Bag lifting means for rolling up the mouth portion of the covered bag body, and a flap standing on the front and rear edges of the container is bent in the front-rear direction, and the mouth of the bag body rolled up by the bag lifting means. Bag tension means for tensioning the portion in a substantially flat state with respect to the front-rear direction, and a flap which bends a flap standing upright at the left and right edges of the container in a direction opposite to both sides of the bag body tensioned by the bag tension means. The bag closing device includes a folding means and a bag sealing means for sealing a mouth portion of the bag body tightened by the bag tightening means in a substantially airtight state.
[0007]
The above-mentioned container can be constituted by, for example, a box made of cardboard or cardboard, a case made of synthetic resin or metal, or the like. Further, the bag body can be composed of, for example, a transparent and translucent bag made of a synthetic resin film (made of vinyl), a paper bag covered with a synthetic resin, and the like. The container can be folded back into a two-folded state (double-folded state) and a one-folded state (single-folded state), and can be placed on a flap that stands on the opening-side peripheral portion of the container. Further, the bag hoisting means can be composed of, for example, a hoisting plate, a hoisting rod, a hoisting frame, a hoisting arm, an adsorbent, an adhesive, and the like. The bag tensioning means may be constituted by, for example, a hollow or solid bag tensioning rod, a bag tensioning plate, a bag tensioning tube, or the like. Further, the flap bending means can be constituted by, for example, a substantially rod-shaped, substantially plate-shaped, substantially linear bending guide, a bending arm, pressurized air, or the like. Further, the bag sealing means can be constituted by, for example, a heating head for performing heat sealing, an adhesive tape, an adhesive, a fastener, a clip) and the like.
[0008]
That is, after opening the mouth of the bag covered by the flap standing on the opening side peripheral portion of the container by the bag winding means, the mouth of the bag wound by the bag winding means is tightened by the bag tensioning means. And folds the flaps standing on the left and right edges of the container in the direction opposite to the bag body sides tensioned by the bag tensioning means by the flap bending means. Then, after the air inside the bag body is degassed and evacuated, the mouth of the bag body tightened by the bag tightening means is sealed in a substantially airtight state by the bag sealing means.
[0009]
As an embodiment, flap erecting means (e.g., an approximately triangular erecting guide or flap as viewed from the side, erecting the left and right flaps of the container bent in a direction facing the both sides of the bag body in a substantially vertical state). And the mouth of the bag sealed by the bag sealing means is pushed inward from the peripheral edge on the opening side of the container, and the flap of the container is allowed to fold inward. Bag pushing means (for example, a bag pushing plate, a bag pushing frame, a bag pushing bar, a bag pushing arm, etc.) which can be accommodated in a state in which the bag is pushed in. Further, the bag tensioning means is constituted by a pair of bag tensioning rods having a substantially hollow cross-sectional shape provided with a function of sucking air inside the bag body (for example, a deaerator such as an intake blower or a vacuum pump). Come out.
[0010]
[Action and effect]
According to the present invention, after the mouth portion of the bag covered by the flap rising on the opening side peripheral portion of the container is wound up and tensioned to a substantially flat state, the left and right flaps of the container are opposed to the side surfaces of the bag. Since it is bent and degassed and degassed, the operation and process of pressing the both sides of the bag body with a pair of deaeration plates or clamping and winding with a pair of gripping rods as in the conventional example are unnecessary. In addition, the time loss at the time of degassing and closing is small, the operation time required for closing the mouth of one bag is greatly shortened, and the labor and the capacity of the bag closing operation can be reduced. In addition, there is no need to provide a mechanism for driving the pair of deaeration plates and the pair of gripping rods, so that the configuration and structure of the entire apparatus can be simplified, and the apparatus can be 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 closing device used for an operation of closing the mouth of a bag laid inside a box as an example of a container. In FIGS. 1 and 2, the bag closing device 10 The box feed conveyor 20 for transferring the laid box B in the transfer direction (the direction of the arrow in the figure), and the boxes transferred to the standby section a, the closing section b, and the pushing section c set on the box feed conveyor 20. A box lifting / lowering device 30 for lifting / lowering the body B, a bag hoisting device 40 for winding up the flaps Ba, Ba of the box B and the mouth Fa of the bag F covered on the flaps Bb, Bb, and a mouth of the bag F A bag tensioning device 50 that tensions and removes the portion Fa in the front-rear direction, a bag sealing device 60 that seals the mouth Fa of the bag F tensioned by the bag tensioning device 50 in a substantially airtight state, and a mouth of the bag F. And a bag pushing device 70 that accommodates the portion Fa inside the box B.
[0012]
As shown in FIG. 3, the above-mentioned box body B is made and assembled in a form in which the upper surface side is opened, flaps Ba, Ba are connected to the front and rear edges on the short side, and the flaps Bb, Bb are connected to the long side. It is connected to the left and right edges. In addition, a bag F made of a synthetic resin film formed transparent or translucent is laid inside the box B, and the mouth Fa of the bag F is folded back in a double folded state (double folded state). And the flaps Ba, Ba and the flaps Bb, Bb of the box B. In addition, as shown in FIG. 4, the mouth portion Fa of the bag body F may be folded back in a single folded state (single folded state). Into the inside of the bag body F, for example, fillers such as powdery raw materials and granular raw materials, and metal parts such as bolts and nuts to which rust-preventive oil has been applied are put in a fixed amount.
[0013]
The above-mentioned box feed conveyor 20 has feed rollers 21... Mounted at predetermined intervals in the transfer direction between mounting frames 22, 22 provided on both sides of the transfer path. The box body B is rotated in the transport direction by a driving force (not shown), and is transported from a filling step (not shown) at the front of the apparatus to a sealing step (not shown) at the rear of the apparatus.
[0014]
The above-mentioned box lifting / lowering device 30 moves the above-mentioned box feeding conveyor 20 up and down by lifting / lowering means such as a screw feed mechanism or a chain mechanism substantially corresponding to boxes B having various sizes (heights). A mouth Fa of the bag F sealed in a substantially airtight state at a height suitable for winding the mouth Fa of the bag F over the flaps Ba, Bb of the body B by a bag hoisting device 40 described later. Is moved up and down to a height suitable for being housed inside the box B by the bag pushing device 70 described later, and a height suitable for carrying in and out. Further, the box feeding conveyor 20 in the standby section a, the closing section b, and the pushing section c can be moved up and down independently by the box elevating device 30.
[0015]
As shown in FIGS. 5 and 7, the above-described bag hoisting device 40 includes a pair of windings that hoist the flaps Ba, Ba of the box B and the mouth Fa of the bag F covered on the flaps Bb, Bb. The lifting unit 41 is movably mounted on the mounting frame 42 provided above the closed section b on the box feeding conveyor 20 so as to be movable left and right. A loop-shaped chain 43 stretched over the mounting frame 42 is attached to the pair of hoisting units 41. It is connected to. In other words, the chain 43 is rotated forward and backward by the driving force of a motor with a reduction gear (not shown), and the pair of hoisting units 41 are transported by the box feeding conveyor 20 to transport the box B and the bag tensioning device 50 The retracting position at which the tensioning operation of the body F is permitted, the intermediate position at which a pair of hoisting plates 47 described below approach and press against both side surfaces of the box B, and the heating head 61 and the receiving head 63 described later are connected to a bag tensioning device. The bag F moves left and right to a forward position where the bag presses against both sides of the mouth Fa of the bag F, which is tensed by 50.
[0016]
In the above-described hoisting unit 41, a pair of movable tables 44 are attached to the mounting frame 42 so as to be movable left and right, and a lifting table 45 is attached to the movable table 44 so as to be movable up and down. The elevating cylinder 46 is connected to the elevating table 45. In other words, the pair of lift tables 45 are moved up and down in a substantially vertical direction by the operation of the lift cylinder 46, and the hoisting plate 47 attached to the lift table 45 is covered with the bags covered by the flaps Ba and Bb of the box B. It moves up and down to a lower position below the mouth Ba of the body F and to a rising position where the mouth Ba of the bag F covered by the flaps Ba and Bb of the box B is wound up.
[0017]
In addition, the pair of hoisting plates 47 are formed in a size, shape, and thickness suitable for hoisting the mouth Fa of the bag body F over the flaps Ba, Bb of the box body B, and are formed in the closed section b. Opposite to the flaps Bb, Bb of the transported box B, it is attached to a support arm 45a fixed to the center of the front side of the left and right elevating platform 45 when viewed from the transport direction. Further, the whole and upper end portion of the bag hoisting plate 47 may be formed so as to be inclined and shaped so as to be pressed obliquely upward against the side outer surface portion of the box B.
[0018]
As shown in FIG. 6, the bag tensioning device 50 includes a pair of bag tensioning rods 51 having a substantially hollow cross-sectional shape. The piston rod of a rotary cylinder 53 attached to the front and rear ends of the lifting frame 52 is connected to the base end of the bag tension rod 51. In addition, the mounting frame 54 is installed above the elevating frame 52, and the piston rod of the elevating cylinder 55 erected on the mounting frame 54 is connected to the elevating frame 52. Further, the pair of bag tension bars 51 are connected to a deaerator (not shown) such as an intake blower or a vacuum pump, and forcibly deaerate and remove the atmosphere inside the bag F.
[0019]
That is, the pair of bag tension rods 51 are raised and lowered in a substantially vertical direction by the operation of the lifting cylinder 55, and the descent position inserted between the flaps Ba and Ba of the box B conveyed to the closed section b, It moves up and down to a raised position where it is pulled out from between Ba and Ba. Further, by the operation of the rotation cylinder 53, the cylinder is rotated in a direction (front-rear direction) substantially parallel to the transport direction, and the closing angle inserted between the mouth Fa of the bag body F and the flaps Ba, Ba of the box body B is determined. The bag body B is pivoted back and forth to an opening angle at which the flaps Ba, Ba of the box body B are bent at substantially 90 degrees with respect to a direction substantially parallel to the transport direction, and the bag body wound up by the bag hoisting device 40 described above. The opening Fa of the F is tensioned 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 above-mentioned bag sealing device 60 includes a reciprocating cylinder 62 having a heating head 61 attached to a lower end of a support arm 45 a constituting a left elevating platform 45 as viewed from the transport direction. Connected to piston rod. Further, the receiving head 63 facing the heating head 61 is connected to a piston rod of an advancing / retracting cylinder 64 attached to a lower portion on the distal end side of a support arm 45a constituting the right lifting platform 45. That is, the reciprocating cylinders 62 and 64 are actuated to sandwich the opening Fa on both sides of the bag body F tensioned by the bag tensioning device 50 between the heating head 61 and the receiving head 63, so that the heating head 61 generates heat. Heat seal.
[0021]
In addition, a pair of folding guides 65 formed in a size and a shape in which the flaps Bb, Bb of the box B are folded inward are opposed to the flaps Bb, Bb of the box B conveyed to the closed section b. Thus, it is attached to the lowermost end of the left and right support arms 45a. In other words, the pair of bending guides 65 are moved left and right integrally with the pair of hoisting units 41, and the retracted position at which the transport of the box B by the box feed conveyor 20 is allowed, and the flaps Bb, Bb of the box B Move to the forward position where it is folded inward.
[0022]
Also, as shown in FIG. 10, the flaps Bb, 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 substantially vertical (for example, a substantially triangular shape when viewed from the side). A pair of standing guides 66 having a (shape) configuration is disposed above the transport path between the closing section b and the pushing section c on the box feed conveyor 20.
[0023]
As shown in FIG. 11, the bag pushing device 70 has a size and a shape substantially corresponding to the opening on the upper surface side of the box B, and has a size and a shape that can be inserted into the inside of the box B. The formed bag pushing plate 71 is vertically movably suspended from a mounting frame 72 erected above the pushing section c on the box feed conveyor 20, and the piston rod of the elevating cylinder 73 erected on the mounting frame 72 is bagged. It is connected to the pushing plate 71. That is, the bag pushing plate 71 is moved up and down in a substantially vertical direction by the operation of the lifting cylinder 73 so that the opening Fa of the bag F sealed by the above-described bag sealing device 60 is closer to the opening-side peripheral portion of the box B. Also moves up and down to a lower position where it is pushed inward and accommodated, and a raised position where contact with the flaps Ba and Bb where the transport of the box body B is allowed and rises is avoided. Instead of the cylinder of the embodiment, for example, a driving means such as a screw feed mechanism, a chain mechanism, a cam mechanism, or a solenoid can be used.
[0024]
The illustrated embodiment is configured as described above. Hereinafter, the closing operation of the bag F laid inside the box B by the bag closing device 10 will be described.
[0025]
First, as shown in FIGS. 1 and 2, a box B (see FIG. 3) on which a bag has been laid is transported and stopped to a closed section b on the box feed conveyor 20, and the next box B is placed in a standby section a Then, the box lifting / lowering device 30 is driven to lift the box B placed on the box feed conveyor 20 to a height suitable for raising and tightening the mouth Fa of the bag F. .
[0026]
Next, as shown in FIG. 5, the bag hoisting device 40 is driven to bring the pair of hoisting units 41 close to the outer surface of the bottom side of the box B, and the pair of hoisting plates 47 are moved to the box B. After being brought close to and pressed against the bottom side outer surface of the box B, the pair of hoisting plates 47 are moved upward in the substantially vertical direction while the pair of hoisting plates 47 are connected to the flaps Bb, Bb of the box B and the mouth of the bag F. Fa, the mouth Ba of the bag body F covered by the flaps Ba, Bb of the box body B is wound up, and the pair of hoisting units 41 are folded by the pair of bending guides 65. Bb, the descent stops at a height at which it abuts against the outer surface on the lower end side of Bb.
[0027]
Before the mouth Fa of the bag F is wound up, the pair of bag tension bars 51 constituting the bag tensioning device 50 is rotated to the closed angle position where the bag B is inserted between the flaps Ba, Ba of the box B. It is lowered in advance to the lowered position and inserted into the mouth Ba of the bag body F wound up by the pair of hoisting plates 47.
[0028]
Next, as shown in FIG. 6, the bag tensioning device 50 is driven to rotate the pair of bag tensioning rods 51 back and forth to the open angle, so that the flaps Ba, Ba of the box B are substantially parallel to the transport direction. After being bent in the front-rear direction, the pair of bag tension rods 51 are vertically lowered to a height at which the tip end of the bag tension rod 51 is substantially horizontal with the opening side peripheral edge of the box B, and the flap of the box B Ba, Ba are bent substantially horizontally and at an angle not less than substantially horizontal.
[0029]
Further, the opening Fa of the bag body F wound up by the bag hoisting device 40 is tensioned in a substantially flat state and a substantially straight state with respect to the transport direction (front-rear direction), and the inner wall surface on the opening side of the bag body F is opened. Are pressed against each other and pressed against the upper surface of a container (not shown) to deaerate and evacuate the air inside the bag body F. At the same time, degassing and degassing are forcibly performed by the suction force of a degassing device connected to the bag tension bar 51.
[0030]
7 and 8, while raising the pair of bag tension bars 51 to a height at which the tip of the bag tension bar 51 is inserted and locked into the mouth Fa of the bag F, The pair of hoisting units 41 are moved in a direction facing the both sides of the opening Fa of the bag body F, and the flaps Bb, Bb of the box body B are bent inward by the pair of bending guides 65, and the bag body F Of the bag F is pressed against the upper surface of the container (not shown), and the inner walls of the bag F are brought into close contact with each other, and the air inside the bag F is deaerated and evacuated.
[0031]
Subsequently, as shown in FIG. 9, the heating head 61 and the receiving head 63 of the bag sealing device 60 are connected to the opening of the bag body F positioned lower than the portion where the distal ends of the pair of bag tension bars 51 are inserted. The opening Fa of the bag body F is pressed against both side surfaces of the portion Fa to heat-seal substantially in an airtight state by the heating action of the heating head 61. Thereafter, the pair of hoisting units 41 is moved backward in the separating direction, and the pair of bag tension bars 51 is turned at the closing angle, pulled out from the mouth Fa of the bag F, and returned to the initial position.
[0032]
Next, while the box B on which the sealed bag F is laid is conveyed to the pushing section c on the box feed conveyor 20, the box B is folded by a pair of bending guides 65 as shown in FIG. The folded flaps Bb, Bb of the box B are raised in a substantially vertical state along the pair of upright guides 66, and are conveyed and stopped to the pushing section c on the box feed conveyor 20. Further, the flaps Ba, Ba of the box B may be caused to be substantially vertical.
[0033]
Next, as shown in FIG. 11, the bag pushing device 70 is driven to insert the bag pushing plate 71 substantially vertically into the inside of the box B, and the mouth Fa of the sealed bag F is put into the box. The body B is pushed inward from the peripheral edge on the opening side, and is housed in a state in which the flaps Ba and Bb are allowed to be folded inward (for example, in a state substantially horizontal with the peripheral edge on the opening side of the box body 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 having been pushed into the bag is transported to a sealing step to perform a sealing process. Hereinafter, the closing operation of the bag F is continuously performed in the same manner as described above.
[0034]
As described above, the opening Fa of the bag F covered on the flaps Ba, Ba, Bb, Bb standing on the opening side peripheral portion of the box B is connected to the pair of hoisting plates constituting the bag hoisting device 40. After being wound up at 47 and tensioned to a substantially flat state by a pair of bag tensioning rods 51 constituting the bag tensioning device 50, the left and right flaps Bb, Bb of the box B are bent in a direction facing the both sides of the bag F. As described above, both sides of the bag body are pressed with a pair of deaeration plates, or the operation and process of sandwiching and winding with a pair of gripping rods as in the conventional example are unnecessary. The time required for closing the mouth Fa of one bag F is greatly reduced, and the time required for closing the opening Fa of one bag F can be greatly reduced, so that labor saving and capacity improvement of the bag closing operation can be achieved. In addition, there is no need to provide a mechanism for driving the pair of deaeration plates and the pair of gripping rods, so that the configuration and structure of the entire apparatus can be simplified, and the apparatus can be manufactured at low cost.
[0035]
In addition, since the opening Fa of the bag F is sealed while being tensed, the entire length of the bag F can be shortened as compared with the case where the opening of the bag is wound as in the conventional example. It is possible to reduce the unit price when manufacturing the F and the packaging cost when packing the contents.
[Brief description of the drawings]
FIG. 1 is a side view showing a closing operation of a bag laid on a box by a bag closing device.
FIG. 2 is a front view showing a bag raising operation of the bag raising device.
FIG. 3 is a perspective view showing an example in which the mouth of the bag is folded in two.
FIG. 4 is a perspective view showing another example in which the mouth of the bag is folded in one.
FIG. 5 is a front view showing a bag raising operation by the bag raising device.
FIG. 6 is a side view showing a bag tensioning operation by the bag tensioning device.
FIG. 7 is a front view showing a degassing operation by the bag tensioning device and the bag lifting device.
FIG. 8 is a perspective view showing a tensioned state of the bag body and a bent 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 erecting operation of the box by the erecting guide.
FIG. 11 is a side view showing a bag pushing operation by the bag pushing device.
[Explanation of symbols]
B: Boxes Ba, Bb: Flap F: Bag Fa: Mouth 10: Bag closing device 20: Box feeding conveyor 40: Bag hoisting device 41: Hoisting unit 47 ... Hoisting 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 closing device for closing a mouth portion of a bag body covered with a flap rising on an opening side peripheral portion of a container having an upper surface opening form,
Bag lifting means for rolling up the mouth of the bag covered by the flap standing upright on the opening side peripheral portion of the container,
A bag tensioning means for bending a flap standing on the front and rear edges of the container in the front-rear direction and tensioning the mouth of the bag body wound up by the bag lifting means in a substantially flat state in the front-rear direction. ,
Flap bending means for bending the flaps standing on the left and right edges of the container in a direction opposite to the bag body side faces tensioned by the bag tensioning means,
A bag sealing device comprising: bag sealing means for sealing the mouth of the bag body tensioned by the bag tension means in a substantially airtight state.

Flap erecting means for erecting the left and right flaps of the container bent in a direction facing the both sides of the bag body in a substantially vertical state,
Claims further comprising: bag pushing means for pushing the mouth of the bag sealed by the bag sealing means inward from the peripheral edge of the container on the opening side, and for accommodating the container flap in a state in which it can be folded inside. Item 2. The bag closing device according to Item 1.

2. A bag closing device according to claim 1, wherein said bag tensioning means is constituted by a pair of bag tensioning rods having a substantially hollow cross-sectional shape and having a function of sucking air from said bag body.