JP3793893B2

JP3793893B2 - Bag mouth seal device

Info

Publication number: JP3793893B2
Application number: JP2002116792A
Authority: JP
Inventors: 俊則谷口; 隆生神谷; 泉秋田; 弘次村瀬
Original assignee: 株式会社フジキカイ
Priority date: 2001-04-20
Filing date: 2002-04-18
Publication date: 2006-07-05
Anticipated expiration: 2022-04-18
Also published as: JP2003002301A

Description

【０００１】
【発明の属する技術分野】
本発明は、物品を収容した袋の袋口部をシールする袋口部シール装置に関するものである。
【０００２】
【従来の技術】
物品を収容した袋の袋口部をシールする装置に関して、次のようなものが従来から採用されている。例えば、一対のエンドレス状ベルトの間に袋口部を挟んで搬送しつつ、該袋口部を加熱ローラ間に通過させることでシールしたり、あるいは加熱板を用いてベルト自体を加熱することで、挟まれている袋口部をシールする技術がある。
【０００３】
【発明が解決しようとする課題】
袋に収容した物品が嵩のあるものの場合、該袋の袋口部は筒状になるため、前記のベルトに筒状の袋口部を挟んだ際に皺を生じてしまう。従って、そのままシールされるとシール部に皺が残り、見栄えが劣ると共に、シールが不完全となるおそれがある。
【０００４】
【発明の目的】
この発明は、前述した従来の技術に内在している前記課題に鑑み、これを好適に解決するべく提案されたものであって、袋の袋口部に良好なシールを施し得る袋口部シール装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
前述した課題を克服し、所期の目的を好適に達成するため、本発明に係る袋口部シール装置は、
袋に物品を収容する袋詰機から搬出される袋の袋胴部が載置され、該搬出方向と交差する方向に向けて袋を、その開口縁が袋移送方向に沿う姿勢で移送する移送手段と、
前記移送手段の速度と略同速度で走行し、前記袋の袋口部を載置保持して袋移送方向の下流側に向けて移送する袋口搬送手段と、
前記袋口搬送手段で移送される袋口部に対して昇降動可能に設定され、袋口部を吸着して上昇することで該袋口部を開口する吸着部材を備え、該吸着部材が袋口搬送手段とによって袋口部を挟持する状態では、袋口搬送手段と略同速度で袋移送方向の下流側に向けて移動するよう設定される開口手段と、
前記開口手段により開口された袋の袋口部内に進入して袋移送方向に沿って開くことで、該袋口部を扁平状態にする一対の拡開部材を備え、該拡開部材は扁平状態の袋口部を拡開状態としたもとで、前記袋口搬送手段と略同速度で袋移送方向の下流側に向けて移動するよう設定される整形手段と、
前記袋口搬送手段の速度と略同速度で走行し、前記整形手段で扁平状態とされる袋口部を、前記袋口搬送手段における載置保持位置より袋胴部側で支持して袋移送方向の下流側に向けて移送する保持手段と、
前記保持手段により扁平状態で移送される袋口部をシールするシール手段とから構成したことを特徴とする。
【０００６】
【発明の実施の形態】
次に、本発明に係る袋口部シール装置につき、好適な実施例を挙げて、添付図面を参照しながら以下説明する。なお、本発明は以下の実施例に限定されるものではない。
【０００７】
図１に示す袋口部シール装置(以下単にシール装置と云う)１０は、一方に開口部(袋口)を有する袋１１に、例えば食パン等の物品１２を袋詰めする袋詰機(図示せず)の後段に配置される。そして、袋詰機で物品１２が収容された袋１１は、図２に示す如く、その袋口が上流側を指向する姿勢で搬出コンベヤ１３によって搬出され、この袋１１がシール装置１０に受け渡されるよう構成される。なお、袋１１の物品１２が収容されている部分を袋胴部１１ａと指称し、該袋胴部１１ａから開口部側に向けて延在する部分を袋口部１１ｂと指称する。
【０００８】
【移送手段】
前記シール装置１０は、前記搬出コンベヤ１３から受け渡された袋１１を、その袋口が側方を向く横向き姿勢で該コンベヤ１３による袋１１の搬出方向と略直角に交差する方向に向けて略水平に移送する移送手段１４を備える。この移送手段１４は、袋１１における袋胴部１１ａが載置される略水平なテーブル１５の下方を循環走行する無端チェン１６に所定間隔で取付けた多数の押送体１７からなる押送コンベヤで構成され、無端チェン１６の上側の走路においてテーブル１５から上方に突出する押送体１７により、該テーブル１５に載置された袋胴部１１ａを押して下流側に移送するよう構成される。このとき袋１１は、前記袋口部１１ｂが押送コンベヤ１４の一側部(後側)外方に延出すると共に、その開口縁が袋移送方向に沿う姿勢で移送されるようになっている。なお、押送コンベヤ１４による袋移送方向と水平に直交する方向を前後方向と指称し、袋口部１１ｂが袋胴部１１ａから延出する向きを後側と指称する。
【０００９】
前記押送コンベヤ１４で移送される袋１１における袋口部１１ｂが延出するコンベヤ後側に、該袋口部１１ｂを開口する開口手段１８、袋口部１１ｂを扁平状態に整形する整形手段１９、袋口部１１ｂをシールするシール手段２０および袋口部１１ｂを結束する結束手段２１が、押送コンベヤ１４での袋移送方向上流側から下流側に順に配置されている。
【００１０】
【袋口搬送手段】
前記押送コンベヤ１４の後側に位置する装置機枠２５に調節用機体２６が上下動可能に配設され(図８参照)、調節用機体２６は、該機体２６と螺合するネジ軸とスプロケット等からなる調節機構２７を図示しないモータにより回転することで上下位置が調節され、これら調節用機体２６と調節機構２７とから位置調節手段を構成するようになっている。この調節用機体２６に一体的に配設された第１フレーム２８に、袋移送方向の前後に離間して一対のプーリ２９,２９が回転可能に枢支され、両プーリ２９,２９間に、走行方向に所定間隔で吸引孔２２ａが多数穿設された袋口搬送手段としての第１の吸着ベルト２２が巻掛けられている。この第１の吸着ベルト２２において袋口部１１ｂを移送する上側の走路は、図１または図２に示す如く、前記搬出コンベヤ１３から押送コンベヤ１４への袋１１の受け渡し位置の直後から下流側のシール手段２０の直前までの間に亘って延在して、押送コンベヤ１４の袋移送方向に沿って該コンベヤ１４の速度と略同速度で走行するよう設定される。
【００１１】
また、前記第１の吸着ベルト２２における上側の走路(押送コンベヤ１４で移送される袋１１と同じ向きに走行する走路)の下面側には、第１フレーム２８に配設されて図示しない吸引源に接続する第１吸引チャンバー３０が接し、押送コンベヤ１４で移送される袋１１における袋口部１１ｂの下側側部を、第１吸引チャンバー３０上面の透孔(図示せず)および前記吸引孔２２ａを介して作用する吸引力によって略水平なベルト上面に吸着保持した状態で下流側に移送するよう構成される。なお、第１吸引チャンバー３０の略水平な最上面に沿って走行する第１の吸着ベルト２２の上面高さは、前記袋１１に収容されている物品１２の高さの略１／２の位置あるいはこれより僅かに低い位置となるよう、該吸引チャンバー３０の配設位置が設定されている(図１参照)。
【００１２】
【開口手段】
前記開口手段１８は、前記第１の吸着ベルト２２に載置保持された状態で移送される袋口部１１ｂの移送路の上方に設けられた吸着部材としての吸盤２３およびその回転手段２４から構成され、第１の吸着ベルト２２で移送される袋口部１１ｂの上側側部を吸着した吸盤２３が上昇することによって、該袋口部１１ｂを開口するよう構成される。
【００１３】
前記調節用機体２６に一体的に配設された支持フレーム３１の前側(押送コンベヤ側)に離間して取付部材３２が複数のステー７０を介して配設され、支持フレーム３１と取付部材３２との間に、図４に示す如く、袋移送方向の前後に離間して一対の回転軸３３が回転可能に架設されている。一方の回転軸３３の支持フレーム３１から後方に延出する軸端が、図示しないモータに連結されると共に、両回転軸３３,３３はチェン−スプロケット等からなる連繋機構３４を介して一体的に回転するよう構成される。図３および図４に示す如く、各回転軸３３の取付部材３２から前方に延出する軸端に円盤状の回転体３５が一体回転するよう夫々配設されると共に、両回転体３５,３５には、その回転中心から偏心した位置にホルダ３６の対応する端部が夫々回動可能に枢支されており、両回転体３５,３５が同一方向に回転することで、ホルダ３６は姿勢を維持したまま略鉛直面上で円運動を行なうよう構成される。すなわち、実施例では、回転軸３３,３３、連繋機構３４および回転体３５,３５から回転手段２４が構成される。なお、前記ホルダ３６は、前記押送コンベヤ１４の押送体１７が１ピッチ移動する間に１回転するよう回転制御される。
【００１４】
前記ホルダ３６には、図５に示す如く、エアシリンダ３７が倒立姿勢で配設されると共に、そのピストンロッド３７ａに支持部材３８が連結される。この支持部材３８には、袋移送方向の前後に離間して一対の吸盤２３,２３が前記第１の吸着ベルト２２と対向するよう下向きに配設され、この吸盤２３,２３に接続する吸引源(図示せず)による吸引作用により、前記袋１１の袋口部１１ｂにおける上側側部を吸着保持するよう構成される。各吸盤２３は支持部材３８に対して上下動可能に配設されると共に、常にはバネ３９によって下方に向けて付勢されており、下側を第１の吸着ベルト２２で吸着保持されている袋口部１１ｂに上側から当接した際には上方に退避し得るよう構成される。
【００１５】
前記エアシリンダ３７は、ホルダ３６が最上位位置から最下位位置へ回転移動する際には、該吸盤２３,２３をホルダ３６に対して離間する下動位置まで下動させると共に、最下位位置から最上位位置へ回転移動する際には、該吸盤２３,２３をホルダ３６に対して近接する上動位置まで上動させるよう付勢制御される。また下動位置の吸盤２３,２３は、ホルダ３６が最下位位置に到来する前の所定位置から、第１の吸着ベルト２２とで前記袋口部１１ｂを挟持する(袋口部１１ｂに当接する)よう位置設定されており、このときに該吸盤２３,２３がバネ３９で付勢された状態で袋口部１１ｂに密着するよう構成される。そして、ホルダ３６が最下位位置に到来したときに袋口部１１ｂの上側側部を吸着保持した吸盤２３,２３が、エアシリンダ３７により上動位置まで上動すると共に回転手段２４により上方に向けて回転移動することで、該吸盤２３,２３が第１の吸着ベルト２２から離間するよう上昇して吸着保持した袋口部１１ｂが開口されるよう構成されている。
【００１６】
なお、前記回転手段２４には、前記支持フレーム３１の後側において、前記モータに連結された一方の回転軸３３に不等速回転機構６２が設けられ、ホルダ３６は不等速回転するよう構成される。またホルダ３６は、概ね前記吸盤２３,２３が袋１１の袋口部１１ｂを第１の吸着ベルト２２とで挟持する前述の所定位置から最下位位置を越えた所定位置までは、その袋移送方向の速度が第１の吸着ベルト２２および前記押送コンベア１４の速度と略同一となるよう設定される。すなわち、吸盤２３,２３は、押送コンベヤ１４で移送される袋１１と同じ向き(袋移装方向の下流側)に略同速度で移動しつつ袋口部１１ｂに近接・離間し、近接した際に袋口部１１ｂを吸着して離間する際に吸着した袋口部１１ｂを開口するよう構成されている。また、前記吸盤２３,２３による吸引は、該吸盤２３,２３が袋口部１１ｂに密着するまでの適宜時点で開始され、概ねホルダ３６が最下位位置を越えた前述の所定位置に至るまでの間であって、後述する拡開部材４０,４０が開口された袋口部内に挿入された後の適宜時点で解除されるよう設定してある。
【００１７】
【整形手段】
前記整形手段１９は、一対の拡開部材４０,４０と、該拡開部材４０,４０を開閉する開閉機構４１および拡開部材４０,４０を袋移送方向に沿う方向に走行させる移動機構４２とから基本的に構成される。
【００１８】
前記調節用機体２６の前側に離間して取付フレーム４３が配設され、該取付フレーム４３および調節用機体２６の対向面間に、図６に示す如く、袋移送方向の前後に離間して一対の回転軸４４,４４が夫々回転可能に枢支されている。また各回転軸４４には、軸方向に離間して２つのスプロケット４５,４５が夫々一体回転可能に配設され、袋移送方向の前後で対をなすスプロケット４５,４５に無端チェン４６が夫々巻掛けられて移動機構４２が構成される。そして、一対の無端チェン４６,４６間に、平行な２本のロッドで構成される複数のガイド材対４７が、走行方向に前記押送コンベヤ１４における押送体１７の取付間隔と同一の間隔で架設され、図示しないモータによって無端チェン４６,４６を走行駆動することで、ガイド材対４７が、前記押送コンベヤ１４および第１の吸着ベルト２２の速度と略同速度で循環走行するよう構成される。なお、実施例の２本のロッドからなるガイド材対４７に代えて、一本のレール状のものを採用し得る。
【００１９】
前記ガイド材対４７における上下の移動域の間には、図７に示す如く、上側ガイドレール４８と下側ガイドレール４９とが配設され、各ガイド材対４７に前後方向に移動可能に配設されている移動体５０が、両ガイドレール４８,４９に案内されることでガイド材対４７に対して前後動するよう構成されている。下側ガイドレール４９には、図２に示す如く、移動体５０をガイド材対４７に沿って前進した後に所定長さだけ袋移送方向(押送コンベヤ１４で移送される袋１１と同じ向き)に移動させ、その後に後退させる案内部４９ａが形成してある。また各移動体５０には、上下のガイドレール４８,４９に沿って移動する姿勢において、袋移送方向の前後に離間して板状を呈する一対の拡開部材４０,４０が水平回動可能に配設され、その前端部を袋移送方向に沿う方向に相互に近接・離間(開閉)し得るよう構成される。前記各ガイド材対４７には、両拡開部材４０,４０の間に位置固定状態で臨むカム５１が配設され、該カム５１の袋移送方向前後両側に形成されたカム面５１ａ,５１ａに、両拡開部材４０,４０の後端部に枢支されたカムフォロワ５２,５２が転動可能に当接するようになっている。なお、各拡開部材４０は、移動体５０との間に張設されたバネ５３によって、カムフォロワ５２を常に対応するカム面５１ａに当接するよう付勢されている。また下方移動域(袋口部１１ｂを拡開する整形動作域)を移動する拡開部材４０,４０は、図７に示す如く、袋１１に収容されている物品１２の高さの略１／２の位置に対応するよう位置決め設定される。
【００２０】
前記カム５１のカム面５１ａ,５１ａは、前記移動体５０が下側ガイドレール４９の案内部４９ａに案内されてガイド材対４７に対して前進移動する際に、カムフォロワ５２,５２を介して案内される一対の拡開部材４０,４０の前端部が相互に離間し(開き)、該移動体５０が後退移動する際には前端部が相互に近接する(閉じる)よう設定される。また拡開部材４０,４０が前進移動する位置は、前記開口手段１８により袋口部１１ｂが開口される位置と対応するように、前記案内部４９ａの形成位置が設定されている。すなわち拡開部材４０,４０は、その下方移動域において、押送コンベア１４および第１の吸着ベルト２２の速度と略同速度で袋１１と同じ向き(袋移送方向の下流側)に移動しつつ、開口されている袋口部内に進入して袋移送方向に沿って開くことで、袋口部１１ｂを略水平な扁平状態に整形し、その後に閉じて袋口部外に退出するよう構成される。なお実施例では、前述したガイド材対４７、移動体５０、下側ガイドレール４９およびカム５１から開閉機構４１が構成される。
【００２１】
【シール手段】
前記シール手段２０は、前記調節用機体２６に配設されて、上下に対向する一対の加熱ローラ５４,５４を有し、両加熱ローラ５４,５４の当接位置は、前記押送コンベヤ１４で移送される袋１１に収容されている物品１２の高さの略１／２の位置に対応するよう位置決め設定されている(図８参照)。すなわち、前記整形手段１９により扁平状態に整形された袋口部１１ｂが、両加熱ローラ５４,５４間を通過することで、該袋口部１１ｂに帯状のシールを施すよう構成される。なお、両加熱ローラ５４,５４の回転速度は、前記押送コンベア１４の速度と略同一に設定されている。また前記シール手段２０は、前記調節用機体２６に対して前後方向(袋移送方向と水平に直交する方向)に移動可能に配設され、該シール手段２０(加熱ローラ５４,５４)の位置を、図示しない位置調節手段によって前後方向に移動調節することで、袋口部１１ｂにおけるその開口縁からのシール位置を変更し得るよう構成される。なお、この位置調節手段としては、例えば調節用機体２６に設けられたネジ軸をシール手段２０における適宜の部材と螺合し、該ネジ軸を回転させることでシール手段２０を位置調節する構成を採用し得るが、その他各種の機構を用いることができる。
【００２２】
【保持手段】
図１に示す如く、前記拡開部材４０,４０の下方移動域に近接した下方に、該拡開部材４０,４０により扁平状態にされた袋口部１１ｂを、前記第１の吸着ベルト２２による袋口部１１ｂの載置保持位置より袋胴部側において下側から吸着保持する保持手段５５が配設される。この保持手段５５は、図２に示す如く、前記押送コンベヤ１４に沿って配設された保持用の第２の吸着ベルト５７を有し、第２の吸着ベルト５７の最上側の走路(押送コンベヤ１４で移送される袋１１と同じ向きに走行する走路である袋口部吸着域)において、扁平化された袋口部１１ｂをその状態のまま略水平なベルト上面に吸着保持するよう構成される。すなわち、前記調節用機体２６に一体的に配設された第２フレーム５８(図８参照)に回転可能に配設されて袋移送方向の前後に離間する複数のプーリ５９に第２の吸着ベルト５７が循環走行するよう巻掛けられる。第２の吸着ベルト５７は、前記押送コンベア１４および第１の吸着ベルト２２の速度と略同速度で循環走行すると共に、該第２の吸着ベルト５７の袋口部吸着域と、前記シール手段２０における両加熱ローラ５４,５４が当接する部位とのレベルが略一致するよう設定される。
【００２３】
前記第２の吸着ベルト５７には、その走行方向に所定間隔で吸引孔５７ａが多数穿設されている。また、前記第２の吸着ベルト５７における袋口部吸着域の下面側には、第２フレーム５８に配設されて図示しない吸引源に接続する第２吸引チャンバー６０が接し、押送コンベヤ１４で移送される袋１１における袋口部１１ｂを、第２吸引チャンバー６０上面の透孔６０ａ(図２参照)および各吸引孔５７ａを介して作用する吸引力によって略水平なベルト上面に吸着保持した状態で下流側に移送するよう構成される。なお、図２に示す如く、第２の吸着ベルト５７と第２吸引チャンバー６０とは、シール手段２０の加熱ローラ５４,５４と干渉しない位置を走行すると共に、その下流端部は、加熱ローラ５４,５４の配設位置より下流側に設定され、シールの際にも袋口部１１ｂを第２の吸着ベルト５７で扁平状態に吸着保持するよう構成される。
【００２４】
前記第２の吸着ベルト５７で吸着保持される扁平状態とされた袋口部１１ｂの上方に、前記調節用機体２６に配設されて該袋口部１１ｂの上側を案内する上側ガイド６１が袋口部吸着域に対応する範囲で配設され、扁平状態の袋口部１１ｂが不用意に開かないよう構成してある。すなわち、前記拡開部材４０,４０により扁平状態とされた袋口部１１ｂは、その上側を上側ガイド６１で、その下側を第２の吸着ベルト５７で保持された状態で、シール手段２０の加熱ローラ５４,５４によりシールされるよう構成される(図８参照)。
【００２５】
【結束手段】
前記シール手段２０の下流側に、公知の結束手段２１が配設され、前記押送コンベヤ１４で移送される袋１１のシールが施された袋口部１１ｂに、該袋口部１１ｂを挟持手段で挟持しつつ結束具(何れも図示せず)を装着して結束するよう構成されている。
【００２６】
【実施例の作用】
次に、実施例に係るシール装置の作用につき説明する。前記袋詰機の搬出コンベヤ１３により搬出される袋１１は、その袋口を搬出方向の上流側に指向する姿勢で前記テーブル１５上に受け渡されて袋胴部１１ａが載置される。この袋１１は、前記押送コンベヤ１４の押送体１７により、その開口縁を袋移送方向に沿わせた姿勢で下流側に向けて移送される。このとき、押送コンベヤ１４の後側外方に延出する袋口部１１ｂは、袋１１に収容されている物品１２の高さの略１／２の位置あるいはこれより僅かに低い位置において、図２に示す如く、前記第１の吸着ベルト２２に下側から吸着保持された状態で、該コンベヤ１４と略同速度で下流側に移送される。
【００２７】
前記押送コンベヤ１４で移送される袋１１が所定位置に到来したタイミングで、前記開口手段１８のエアシリンダ３７により下動位置に保持されている吸盤２３,２３が、前記回転手段２４による回転移動により袋口部１１ｂに向けて上方から近接して密着し、前記第１の吸着ベルト２２との間で袋口部１１ｂを挟持した状態で下流側に略同速度で移動する。そして、前記ホルダ３６が最下位位置に到来したときにエアシリンダ３７により吸盤２３,２３が上動位置まで上動されると共に、回転手段２４によりホルダ３６が最上位位置に向けて回転移動することで、該吸盤２３,２３は第１の吸着ベルト２２から離間する。このとき、袋口部１１ｂにおける下側のフィルムは第１の吸着ベルト２２に吸着保持されているから、吸盤２３,２３に吸着保持されている上側のフィルムが上方に持上げられることで、袋口部１１ｂは開口される。
【００２８】
前記開口手段１８により袋口部１１ｂが開口されるタイミングで、前記移動機構４２により下方移動域を袋１１と同じ向きに移動されている整形手段１９の拡開部材４０,４０が、前記開閉機構４１によって前進移動して袋口部内に進入し、次いで前進移動しつつ両拡開部材４０,４０が袋移送方向に沿う方向に開くことで、図２に示す如く、該袋口部１１ｂは扁平状態に整形される。なお、拡開部材４０,４０が袋口部内に進入した後のタイミングで、前記吸盤２３,２３による吸引は解除され、吸盤２３,２３から袋口部１１ｂは解放される。
【００２９】
前記拡開部材４０,４０により扁平状態とされた袋口部１１ｂは、前記第１の吸着ベルト２２および保持手段５５の第２の吸着ベルト５７により下側から吸着保持された状態で下流側に移送される。そして前記シール手段２０の配設位置近傍まで袋１１が移送されると、該袋１１と共に同じ向きに移動していた前記拡開部材４０,４０は開開機構４１の作用によって閉じると共に袋口部外に退出する。また各ベルト２２,５７で下側が吸着保持されている袋口部１１ｂは、その上側が前記上側ガイド６１で保持されて該袋口部１１ｂが不用意に開くのは防止され、扁平状態を保持したままシール手段２０に向けて移送される。
【００３０】
前記扁平状態の袋口部１１ｂは、前記シール手段２０における一対の加熱ローラ５４,５４の間を通過し、このときに帯状のシールが施される。前記保持手段５５における第２の吸着ベルト５７はシール手段２０の下流側まで延在し、そのシール時にも袋口部１１ｂを下側から吸着保持しているから、当該シールが良好に行なわれる。
【００３１】
前記押送コンベヤ１４で下流側に移送される袋１１のシールが施された袋口部１１ｂは、挟持手段により挟持された状態で、前記結束手段２１により結束具が装着され、該袋口部１１ｂは結束具により結束される。
【００３２】
実施例に係るシール装置１０では、物品１２が収容された袋１１の袋口部１１ｂにシールを施す前に、一対の拡開部材４０,４０により扁平状態とするから、物品１２が嵩のあるものの場合であっても良好なシールを施すことができる。しかも、袋口部１１ｂを開口手段１８により予め開口しておくから、拡開部材４０を袋口部１１ｂ内へ確実に挿入し得る。また、前記吸盤２３,２３および拡開部材４０,４０は、押送コンベヤ１４で移送される袋１１と同じ向きに略同速度で移動しつつ開口および扁平化の各処理を行なうので、袋１１の連続移送が可能で、高速運転に対応することができる。
【００３３】
なお、前記袋１１に収容される物品１２の高さが変更された場合は、前記調節機構２７を作動して調節用機体２６を位置調節することで、該調節用機体２６に配設されている前記第１吸引チャンバー３０、第１の吸着ベルト２２のプーリ２９や開口手段１８の回転手段２４(吸盤２３,２３)、整形手段１９、保持手段５５の第２吸引チャンバー６０や第２の吸着ベルト５７のプーリ５９およびシール手段２０は一体的に調節され、押送コンベヤ１４で移送される袋１１に収容された物品１２(袋口)の上下方向中央位置に対応させることが容易にできる。また、前記シール手段２０を位置調節手段により前後に位置調節することで、袋口部１１ｂの開口縁からのシール位置を任意に変更することも可能である。
【００３４】
【別実施例】
図９および図１０は、袋口部シール装置の別実施例を示すものであり、その基本的な構成は前述した実施例と同じであるので、異なる部分についてのみ説明すると共に、既出の同一部材には同じ符号を付すものとする。
【００３５】
【物品検出センサ】
別実施例の袋口部シール装置７１では、前記開口手段１８の吸盤２３,２３による袋口部１１ｂの吸着位置より上流側に、前記押送コンベヤ１４の各押送体１７によって所定間隔毎に物品１２が収容された袋１１が移送されてきているか否かを検出(有無の検出)する光電式の物品検出センサ６３が配設されている。そして、この物品検出センサ６３によって袋１１が検出されなかった際には、前記開口手段１８による袋口部１１ｂの開口作動、すなわち吸盤２３,２３の吸引作用、および前記エアシリンダ３７による吸盤２３,２３の下動が休止されるよう設定してある。これにより、袋１１を押送していない空の状態の押送体１７が吸着位置に到来する際には、開口手段１８の不必要な作動が抑制される。
【００３６】
【保持手段】
別実施例の保持手段６５は、前述した実施例のように袋口部１１ｂを下側から吸着保持する第２の吸着ベルト５７に代えて、該袋口部１１ｂを上下で挟んで移送する一対の無端状支持ベルト６６,６７で構成される。すなわち保持手段６５は、前記整形手段１９の拡開部材４０,４０により扁平状態とされた前記袋口部１１ｂを載置して移送する下側支持部材としての下側支持ベルト６７と、袋口部１１ｂを上方から支持する上側支持部材としての上側支持ベルト６６とを有し、両支持ベルト６６,６７により袋口部１１ｂを挟んだ状態で前記シール手段２０に向けて移送するよう構成されている。また上下の各支持ベルト６６,６７は、何れも前記押送コンベア１４および第１の吸着ベルト２２の速度と略同速度で袋移送方向に沿って循環走行するよう設定される。なお、前記両支持ベルト６６,６７による袋口部１１ｂの挟み位置は、図１０に示す如く、前記拡開部材４０,４０の拡開時における最も前進した位置(袋胴部側に最も近接した位置)での袋胴部１１ａ側を向く先端部より更に袋胴部側の位置に設定されて、該拡開部材４０,４０と上側支持ベルト６６とが干渉しないように構成してある。
【００３７】
前記下側支持ベルト６７は、図９に示す如く、前記拡開部材４０,４０の下方移動域(整形動作域)より上流側からシール手段２０を越える位置までに亘り、上側の走路が水平に延在するよう設定される。これに対して上側支持ベルト６６は、拡開部材４０,４０の下方移動域における下流側からシール手段２０を越える位置までに亘り、下側の走路が下側支持ベルト６７に沿って水平に延在するよう設定されており、シール手段２０でシールされる際の袋口部１１ｂを上下の支持ベルト６６,６７で挟んだ状態で移送することで、シールを良好に行なわせるようになっている。別実施例の保持手段６５では、上下の支持ベルト６６,６７は袋口部１１ｂを扁平状態で維持できる程度に軽く挟んで支持しているが、所定圧で確実に挟持するようにしてもよい。
【００３８】
なお、前記下側支持ベルト６７の上側水平走路と前記シール手段２０における両加熱ローラ５４,５４の当接部位とのレベルが、略一致するよう設定される。また、上側支持ベルト６６と下側支持ベルト６７とからなる保持手段６５は、前記物品１２の高さに対応して、第１の吸着ベルト２２(袋口搬送手段)、開口手段１８、整形手段１９およびシール手段２０と一体的に高さ方向の位置調節が行なわれるよう構成してある。
【００３９】
【異常検出センサ】
ここで、前記袋詰機から袋口部シール装置７１に搬出された袋詰品において、前記袋１１の袋胴部１１ａに収容されているべき物品１２の一部が、袋口部１１ｂに存在していると、下流側において開口手段１８や整形手段１９等での処理に際し、これら手段１８,１９が該物品１２を傷めたり、あるいは該物品１２を開口手段１８や整形手段１９等で噛込んで、これら手段１８,１９が故障するおそれがある。そこで別実施例では、袋口部１１ｂに前記物品１２が存在しているか否かを検出する異常検出センサ６４が設けられている。この異常検出センサ６４は、前記保持手段６５の上流側で、該保持手段６５を構成する下側支持ベルト６７の上方において、物品１２が当接可能な位置に臨んで傾動可能な検出片６４ａを備え、該検出片６４ａに上流側から物品１２が当接して傾動されたときに異常検出して、このときには当該シール装置７１自体の動作を停止制御するよう設定される。すなわち、物品１２が存在する袋口部１１ｂが、開口手段１８や整形手段１９等で処理されて故障の原因となるのを未然に防止することができるようになっている。
【００４０】
【脱気手段】
前記上側支持ベルト６６の上流側端より僅かに上流側に、前記袋口部１１ｂに向けて上方から圧縮エアを吹付けて該袋口部１１ｂ内のエアを排出するための脱気手段としてのエア吹付けノズル６８が配設されている。なお、エア吹付けノズル６８は、前記整形手段１９の拡開部材４０,４０により扁平状態とされている袋口部１１ｂと袋胴部１１ａとの間に臨んでフィルムが上下に離間している袋口部１１ｂに向けて圧縮エアを吹付けるよう位置決めされ、袋口部１１ｂの全体におけるエア抜きを行なうことで、袋１１を物品１２に沿った形状となるようにすると共に、前記保持手段６５における上下の支持ベルト６６,６７で挟まれる部位を略扁平状として両ベルト６６,６７間に袋口部１１ｂが円滑に導入されるようになっている。
【００４１】
【巻込み防止手段】
前記シール手段２０における上側の加熱ローラ５４のシール面は凹凸形状に設定され、シール面が平面に設定された下側の加熱ローラ５４とによって袋口部１１ｂを所定圧力で挟持して回転することで、該袋口部１１ｂに施すシール部にシール目を付与するよう構成されている。この場合、シール面が凹凸形状とされた上側の加熱ローラ５４にシールされた袋口部１１ｂが付着した状態で、該上側加熱ローラ５４に巻込まれて上方に捲れ上がるおそれがある。これを防止するため別実施例では、両加熱ローラ５４,５４による袋口部１１ｂの挟持位置を挟んで袋移送方向の上流側から下流側に亘る所定範囲で、該袋口部１１ｂを袋移送方向に沿って案内する巻込み防止手段６９が設けられている。
【００４２】
前記巻込み防止手段６９は、前記加熱ローラ５４,５４の挟持位置より後側において、前記保持手段６５により移送される袋口部１１ｂの上方位置を該保持手段６５の速度と略同速度で循環走行する無端ベルト７０を有し、該ベルト７０の下側の水平走行路が、前記挟持位置を挟んで袋移送方向の上流側から下流側に亘る所定範囲で延在するよう設定される。そして、この水平走行路を下流側に向けて走行する無端ベルト７０が、前記袋口部１１ｂの上面を支持案内するよう構成される。すなわち、両加熱ローラ５４,５４により袋口部１１ｂがシールされる際には、その開口縁側の上面が無端ベルト７０により支持案内されることで、該袋口部１１ｂの上方への捲れ上がりは防止され、良好なシールが達成されるようになっている。またこの巻込み防止手段６９は、物品１２の高さに対応してシール手段２０と一体的に高さ方向の位置調節が行なわれるよう構成される。
【００４３】
なお、前記袋口部１１ｂの巻込みのおそれがある凹凸形状のシール面に設定された一方の加熱ローラ５４が上側に設けられている別実施例では、前記無端ベルト７０を袋口部１１ｂの移送路の上方に設けたが、下側に設けられる加熱ローラ５４のシール面が凹凸形状に設定されている場合は、袋口部１１ｂの移送路の下方に無端ベルト７０を配設する構成が採用される。また、必要に応じて無端ベルト７０を上下に設けて袋口部１１ｂを上下の無端ベルト７０,７０で挟んだ状態で下流側に向けて移送しつつ案内するものであってもよい。但し、上下の両加熱ローラ５４,５４のシール面が何れも平面に設定されている場合等では、巻込み防止手段６９を省略することができる。
【００４４】
そして別実施例の袋口部シール装置７１では、前述した実施例のシール装置１０と同様の作用を奏するのに加えて、袋１１を押送していない空の状態の押送体１７が、前記開口手段１８の吸着位置に到来する場合は、これを前記物品検出センサ６３で検出して、開口手段１８における吸盤２３,２３の吸引や下動を休止させることができ、該開口手段１８がムダな動きをするのを抑制し得る。また、前記袋口部１１ｂに物品１２が存在することを、前記異常検出センサ６４が検出した際には、シール装置７１の動作を停止制御することで、下流側での開口手段１８、整形手段１９および保持手段６５(上下の支持ベルト６６,６７)等において物品１２を傷めたり、該物品１２を噛込むことによるこれら手段１８,１９,６５の故障は未然に防止される。
【００４５】
更に、前記整形手段１９の拡開部材４０,４０により扁平状態とされている袋口部１１ｂにおける袋胴部１１ａ側の部分に前記エア吹付けノズル６８から圧縮エアを吹付けることで、袋口部１１ｂ内のエア抜きが達成される。これにより、袋口部１１ｂにおける前記上下の支持ベルト６６,６７で挟まれる部位が略扁平状となり、両支持ベルト６６,６７間に袋口部１１ｂが円滑に導入される。また、袋口部１１ｂの全体のエア抜きが好適に達成されるから、タイトな包装体が得られる。
【００４６】
更にまた、前記シール手段２０による袋口部１１ｂのシールに際して、そのシール位置より袋胴部１１ａ側の袋口部１１ｂは上下の支持ベルト６６,６７で挟んだ状態で移送されるから、シールを良好に行なうことができる。しかも、シール面が凹凸形状とされた上側の加熱ローラ５４と対応して、該袋口部１１ｂのシール位置より開口縁側の上面を前記無端ベルト７０で案内支持するから、袋口部１１ｂが上側の加熱ローラ５４に巻込まれるのを防止することができ、より良好なシールを達成し得る。
【００４７】
【変更例】
実施例では、袋を水平に移送するよう構成したが、袋の袋口が斜め上方を向く姿勢となるように、装置全体を傾けて配置してもよい。また、移送手段としては、実施例の押送コンベアに代えてベルトコンベアを採用することができる。更に、袋口搬送手段に関しては、吸着ベルトに限定されるものでなく、袋口部を粘着保持し得る粘着ベルト等、袋口部を位置ずれすることなく保持して走行し得る、その他各種方式を採用し得る。
【００４８】
前記シール手段に関しては、実施例の加熱ローラに代えて、シールバーを上下に対向するよう設け、これらシールバーが袋口部に対する挟持状態を保って袋と共に移動する、いわゆるボックスモーションをするようにしてもよい。また、吸盤の配設数は、実施例のように２つである必要はなく、袋口部における袋移送方向の長さに応じて１つまたは３つ以上の適宜数に設定すればよい。なお、開口手段に関しては、吸盤の回転手段は実施例の構成に限定されるものでなく、例えば所定の配置で配設したプーリやスプロケットに巻掛けたベルトやチェンに吸盤を配設し、該ベルトやチェンの走行に伴って吸盤が袋口部に対して近接・離間移動(昇降動)するよう構成してもよい。また、吸盤を昇降動する手段と、袋移送方向に沿って前後動する手段とを別々に設けることで、実施例と同様の動作をさせる構成を採用し得る。更に、整形手段の開閉機構や移動機構に関しても、実施例の構成に限定されず、流体圧シリンダにより拡開部材を開閉したり袋移送方向に沿って往復移動する構成を適宜に採用し得る。更にまた、袋口搬送手段、開口手段、整形手段、保持手段およびシール手段は、夫々が袋口部の位置に対応して位置調節し得る位置調節手段を備えていてもよい。
【００４９】
なお、別実施例に採用した物品検出センサ、異常検出センサ、脱気手段および巻込み脱止手段は、実施例の装置に適宜に採用することができる。また巻込み防止手段は、無端ベルトに代えて複数の自由回転可能なローラを袋移送方向に並列に配置する構成等、袋口部の加熱ローラへの巻込みを防止し得るものであれば、その他の構成を採用し得る。
【００５０】
【発明の効果】
以上に説明した如く、本発明の請求項１に係る袋口部シール装置によれば、袋口部を拡開部材で扁平状態にしたもとでシールを施し得るから、良好なシールが得られる。また拡開部材は、移送される袋に対し同じ向きに移動しつつ袋口部を扁平状態にするから、袋の連続移送が可能で高速運転に対応できる。
【００５１】
請求項２に係る袋口部シール装置によれば、吸着部材と対向して配設した吸着ベルトにより袋口部を吸着保持するよう構成したので、該袋口部の開口を確実に行なうことができる。また請求項３に係る袋口部シール装置によれば、袋に収容される物品の大きさに応じて、袋口搬送手段、開口手段、整形手段、保持手段およびシール手段を位置調節し得るから、常に物品の中央位置に対応して袋口部を扁平状態にしたもとでシールを施すことができ、良好なシールが得られる。更に、請求項４に係る袋口部シール装置によれば、シール手段による袋口部に対するシール位置を調節し得るので、袋口部の開口縁からのシール位置を任意に変更することも可能である。更にまた、請求項５に係る袋口部シール装置によれば、単に袋口部を結束しただけのものに比べて異物の混入を防ぐ効果が顕著となる。
【００５２】
請求項６に係る袋口部シール装置によれば、シール手段でシールされる際の袋口部を一対の支持部材で挟んだ状態で移送するから、該シール手段でのシールを良好に行なうことができる。請求項７に係る袋口部シール装置によれば、上側支持部材の上流側において袋口部に圧縮エアを吹付けてエア抜きを行なうことで、一対の支持部材間への袋口部の円滑な導入が達成される。請求項８に係る袋口部シール装置によれば、開口手段の吸着位置より上流側で物品が収容された袋の有無を検出する物品検出センサが袋を検出しないときには、開口手段の作動を休止してムダな動きを抑制し得る。請求項９に係る袋口部シール装置によれば、シール手段でシールされる際の袋口部を巻込み防止手段で袋移送方向に沿って案内することで、加熱ローラへの袋口部の巻込みを防止することができる。更に、請求項１０に係る袋口部シール装置によれば、袋口部に物品が存在することを異常検出センサが検出した際には、袋口部シール装置の動作を停止するので、下流側での各手段等において物品を傷めることや、該物品を噛込むことによるこれら手段の故障は未然に防止される。
【図面の簡単な説明】
【図１】本発明の好適な実施例に係る袋口部シール装置を示す概略正面図である。
【図２】実施例に係る袋口部シール装置を示す概略平面図である。
【図３】実施例に係る開口手段の要部を示す概略正面図である。
【図４】実施例に係る開口手段の要部を示す概略平面図である。
【図５】実施例に係る開口手段の要部を示す概略側面図である。
【図６】実施例に係る整形手段の要部を示す概略平面図である。
【図７】実施例に係る押送コンベヤ、整形手段および保持手段の要部を示す概略側面図である。
【図８】実施例に係る押送コンベヤ、保持手段およびシール手段の要部を示す概略側面図である。
【図９】本発明の好適な別実施例に係る袋口部シール装置を示す概略正面図である。
【図１０】別実施例に係る袋口部シール装置を示す概略平面図である。
【符号の説明】
１０袋口部シール装置
１１袋
１１ａ袋胴部
１１ｂ袋口部
１２物品
１４押送コンベヤ(移送手段)
１８開口手段
１９整形手段
２０シール手段
２１結束手段
２２第１の吸着ベルト(袋口搬送手段)
２３吸盤(吸着部材)
２６調節用機体(位置調節手段)
２７調節機構(位置調節手段)
４０拡開部材
５５保持手段
６３物品検出センサ
６４異常検出センサ
６５保持手段
６６上側支持ベルト(上側支持部材)
６７下側支持ベルト(下側支持部材)
６８エア吹付けノズル(脱気手段)
６９巻込み防止手段
７１袋口部シール装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag mouth portion sealing device for sealing a bag mouth portion of a bag containing an article.
[0002]
[Prior art]
Conventionally, the following devices have been adopted as a device for sealing a bag mouth portion of a bag containing articles. For example, while transporting the bag mouth portion between a pair of endless belts, the bag mouth portion is sealed by passing between heating rollers, or the belt itself is heated by using a heating plate. There is a technology for sealing the sandwiched bag mouth.
[0003]
[Problems to be solved by the invention]
In the case where the article contained in the bag is bulky, the bag mouth portion of the bag has a cylindrical shape, and thus wrinkles are generated when the cylindrical bag mouth portion is sandwiched between the belts. Therefore, if it is sealed as it is, wrinkles remain in the seal portion, the appearance is inferior, and the seal may be incomplete.
[0004]
OBJECT OF THE INVENTION
In view of the above-mentioned problems inherent in the prior art described above, the present invention has been proposed to suitably solve this problem, and a bag mouth seal that can provide a good seal to the bag mouth of the bag. An object is to provide an apparatus.
[0005]
[Means for Solving the Problems]
In order to overcome the above-described problems and achieve the desired purpose suitably, the bag mouth portion sealing device according to the present invention is:
Transfer that transports the bag in a posture in which the opening edge is along the bag transfer direction in a direction crossing the carry-out direction, where the bag body portion of the bag that is unloaded from the bagging machine that stores articles in the bag is placed. Means,
Traveling at substantially the same speed as the speed of the transfer means, placing and holding the bag mouth portion of the bag and transferring the bag mouth toward the downstream side in the bag transport direction;
It is set so as to be movable up and down with respect to the bag mouth portion transferred by the bag mouth conveying means, and includes an adsorbing member that opens the bag mouth portion by adsorbing and raising the bag mouth portion, and the adsorbing member is a bag In a state where the bag mouth portion is sandwiched by the mouth transporting means, opening means set to move toward the downstream side in the bag transport direction at substantially the same speed as the bag mouth transporting means,
A pair of expanding members that flatten the bag mouth portion by entering the bag mouth portion of the bag opened by the opening means and opening along the bag transport direction, the expanding member being in a flat state The shaping means set to move toward the downstream side in the bag transfer direction at substantially the same speed as the bag mouth conveying means, with the bag mouth portion in an expanded state,
Said Bag mouth transport means Run at approximately the same speed as The bag mouth portion that is flattened by the shaping means, In the bag mouth conveying means Oke The bag body side from the mounting holding position so Holding means for supporting and transferring toward the downstream side in the bag transfer direction;
It is characterized by comprising sealing means for sealing the bag mouth portion transferred in a flat state by the holding means.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, a bag mouth portion sealing device according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. In addition, this invention is not limited to a following example.
[0007]
A bag mouth portion sealing device (hereinafter simply referred to as a “sealing device”) 10 shown in FIG. Z) is placed in the latter stage. Then, as shown in FIG. 2, the bag 11 in which the article 12 is accommodated by the bagging machine is unloaded by the unloading conveyor 13 with the bag opening facing the upstream side, and the bag 11 is delivered to the sealing device 10. Configured to be. A portion of the bag 11 in which the article 12 is accommodated is referred to as a bag body portion 11a, and a portion extending from the bag body portion 11a toward the opening is referred to as a bag mouth portion 11b.
[0008]
[Transport]
The sealing device 10 is configured so that the bag 11 delivered from the carry-out conveyor 13 is oriented in a direction intersecting substantially at right angles to the carrying-out direction of the bag 11 by the conveyor 13 in a sideways posture in which the bag mouth faces sideways. A transfer means 14 for horizontally transferring is provided. The transfer means 14 is composed of a feed conveyor comprising a number of feed bodies 17 attached at predetermined intervals to an endless chain 16 that circulates under a substantially horizontal table 15 on which the bag body 11a of the bag 11 is placed. The bag body 11a placed on the table 15 is pushed and transferred to the downstream side by a pusher 17 projecting upward from the table 15 on the upper runway of the endless chain 16. At this time, the bag 11 is transported in such a manner that the bag mouth portion 11b extends outward from one side (rear side) of the push conveyor 14 and the opening edge thereof is in a posture along the bag transport direction. . In addition, the direction orthogonal to the bag transfer direction by the push conveyor 14 is referred to as the front-rear direction, and the direction in which the bag mouth portion 11b extends from the bag body portion 11a is referred to as the rear side.
[0009]
An opening means 18 for opening the bag mouth portion 11b, a shaping means 19 for shaping the bag mouth portion 11b into a flat state on the rear side of the conveyor where the bag mouth portion 11b of the bag 11 transferred by the push conveyor 14 extends, Sealing means 20 for sealing the bag mouth portion 11b and bundling means 21 for binding the bag mouth portion 11b are arranged in order from the upstream side to the downstream side in the bag transfer direction of the push conveyor 14.
[0010]
[Pouch mouth transport means]
An adjustment machine body 26 is disposed on an apparatus machine frame 25 located on the rear side of the push conveyor 14 so as to be movable up and down (see FIG. 8). The adjustment machine body 26 is screwed with the machine body 26 and a sprocket. The vertical position is adjusted by rotating the adjusting mechanism 27 composed of the like by a motor (not shown), and the adjusting body 26 and the adjusting mechanism 27 constitute a position adjusting means. A pair of pulleys 29 and 29 are pivotally supported by a first frame 28 integrally provided with the adjustment body 26 so as to be separated from each other in the bag transfer direction, and between the pulleys 29 and 29. A first suction belt 22 is wound as a bag mouth conveying means having a plurality of suction holes 22a formed at predetermined intervals in the running direction. As shown in FIG. 1 or FIG. 2, the upper runway for transferring the bag mouth portion 11 b in the first suction belt 22 is the downstream side immediately after the delivery position of the bag 11 from the carry-out conveyor 13 to the push conveyor 14. It extends so as to extend immediately before the sealing means 20, and is set to run at substantially the same speed as the speed of the conveyor 14 along the bag transfer direction of the push conveyor 14.
[0011]
Further, on the lower surface side of the upper runway (the runway running in the same direction as the bag 11 transferred by the push conveyor 14) in the first suction belt 22, a suction source (not shown) is provided on the first frame 28. The lower side of the bag mouth portion 11b of the bag 11 that is in contact with the first suction chamber 30 connected to the push conveyor 14 and is transferred by the push conveyor 14 is formed through a through hole (not shown) on the upper surface of the first suction chamber 30 and the suction hole. It is configured to be transferred to the downstream side while being sucked and held on the upper surface of the substantially horizontal belt by the suction force acting through 22a. Note that the height of the upper surface of the first suction belt 22 that runs along the substantially horizontal uppermost surface of the first suction chamber 30 is a position that is approximately ½ of the height of the article 12 accommodated in the bag 11. Or the arrangement | positioning position of this suction chamber 30 is set so that it may become a position slightly lower than this (refer FIG. 1).
[0012]
[Opening means]
The opening means 18 includes a suction cup 23 as an adsorbing member provided above the transfer path of the bag mouth portion 11b that is transferred while being placed and held on the first adsorbing belt 22, and its rotating means 24. Then, the suction cup 23 adsorbing the upper side portion of the bag mouth portion 11b transferred by the first suction belt 22 is raised so that the bag mouth portion 11b is opened.
[0013]
A mounting member 32 is disposed via a plurality of stays 70 so as to be separated from the front side (pushing conveyor side) of the support frame 31 disposed integrally with the adjustment body 26. In between, as shown in FIG. 4, a pair of rotating shafts 33 are rotatably mounted so as to be separated from each other in the bag transfer direction. A shaft end of one rotary shaft 33 extending rearward from the support frame 31 is connected to a motor (not shown), and the rotary shafts 33 and 33 are integrally formed through a linkage mechanism 34 including a chain-sprocket or the like. Configured to rotate. As shown in FIG. 3 and FIG. 4, a disc-shaped rotating body 35 is disposed so as to rotate integrally with the shaft end extending forward from the mounting member 32 of each rotating shaft 33, and both rotating bodies 35, 35. , The corresponding end portions of the holder 36 are pivotally supported at positions eccentric from the center of rotation thereof, and both holders 35 and 35 rotate in the same direction, so that the holder 36 takes a posture. It is configured to perform a circular motion on a substantially vertical plane while maintaining it. In other words, in the embodiment, the rotating means 24 includes the rotating shafts 33 and 33, the linkage mechanism 34, and the rotating bodies 35 and 35. The holder 36 is controlled to rotate once while the pusher 17 of the pusher conveyor 14 moves one pitch.
[0014]
As shown in FIG. 5, the holder 36 is provided with an air cylinder 37 in an inverted posture, and a support member 38 is coupled to the piston rod 37a. A pair of suction cups 23, 23 are disposed on the support member 38 so as to be spaced apart from each other in the bag transfer direction so as to face the first suction belt 22, and a suction source connected to the suction cups 23, 23. The upper side of the bag mouth portion 11b of the bag 11 is sucked and held by a suction action (not shown). Each suction cup 23 is disposed so as to be movable up and down with respect to the support member 38, and is always biased downward by a spring 39, and the lower side is sucked and held by the first suction belt 22. When contacting the bag mouth portion 11b from above, the bag mouth portion 11b can be retracted upward.
[0015]
When the holder 36 rotates from the uppermost position to the lowermost position, the air cylinder 37 moves the suction cups 23, 23 down to a lower movement position that is separated from the holder 36, and from the lowest position. When rotationally moving to the uppermost position, the urging control is performed so that the suction cups 23, 23 are moved up to an upward movement position close to the holder 36. Further, the suction cups 23, 23 in the downward movement position sandwich the bag mouth portion 11b with the first suction belt 22 from a predetermined position before the holder 36 reaches the lowest position (abut against the bag mouth portion 11b). In this state, the suction cups 23 and 23 are configured to be in close contact with the bag mouth portion 11b while being urged by the spring 39. Then, when the holder 36 reaches the lowest position, the suction cups 23, 23 that suck and hold the upper side portion of the bag mouth portion 11 b are moved up to the upper moving position by the air cylinder 37 and directed upward by the rotating means 24. The suction cups 23, 23 are lifted so as to be separated from the first suction belt 22, and the bag mouth portion 11 b held by suction is opened.
[0016]
The rotating means 24 is provided with a non-constant speed rotating mechanism 62 on one rotating shaft 33 connected to the motor on the rear side of the support frame 31 so that the holder 36 rotates at a non-uniform speed. Is done. In addition, the holder 36 generally has a direction in which the suction cups 23, 23 sandwich the bag mouth portion 11b of the bag 11 with the first suction belt 22 from the predetermined position to a predetermined position beyond the lowest position. Is set to be substantially the same as the speed of the first suction belt 22 and the push conveyor 14. That is, when the suction cups 23 and 23 are moved in the same direction (downstream in the bag transfer direction) as the bag 11 transferred by the push conveyor 14 at a substantially same speed, the suction cups 23 and 23 are moved closer to and away from the bag opening 11b. The bag mouth portion 11b is opened when the bag mouth portion 11b is sucked and separated. The suction by the suction cups 23, 23 is started at an appropriate time until the suction cups 23, 23 come into close contact with the bag mouth portion 11b, and until the holder 36 reaches the above-mentioned predetermined position substantially beyond the lowest position. It is set to be released at an appropriate time after the expansion members 40, 40 described later are inserted into the opened bag mouth portion.
[0017]
[Shaping means]
The shaping means 19 includes a pair of expanding members 40, 40, an opening / closing mechanism 41 for opening and closing the expanding members 40, 40, and a moving mechanism 42 for causing the expanding members 40, 40 to travel in a direction along the bag transfer direction. It basically consists of
[0018]
A mounting frame 43 is disposed on the front side of the adjusting machine body 26 so as to be spaced apart, and a pair of the mounting frame 43 and a facing surface of the adjusting machine body 26 are spaced apart from each other in the bag transfer direction as shown in FIG. The rotation shafts 44 and 44 are pivotally supported so as to be rotatable. In addition, two sprockets 45, 45 are arranged on each rotary shaft 44 so as to be integrally rotated apart from each other in the axial direction, and an endless chain 46 is wound around each of the sprockets 45, 45 paired before and after the bag transfer direction. The moving mechanism 42 is configured by being hung. A plurality of guide material pairs 47 constituted by two parallel rods are installed between the pair of endless chains 46 and 46 at the same interval as the mounting interval of the feeding body 17 in the feeding conveyor 14 in the traveling direction. By driving the endless chains 46 and 46 by a motor (not shown), the guide material pair 47 is configured to circulate at a speed substantially equal to the speed of the push conveyor 14 and the first suction belt 22. Instead of the guide material pair 47 composed of the two rods of the embodiment, a single rail-shaped member can be adopted.
[0019]
As shown in FIG. 7, an upper guide rail 48 and a lower guide rail 49 are arranged between the upper and lower moving areas of the guide material pairs 47, and are arranged so as to be movable in the front-rear direction. The provided moving body 50 is configured to move back and forth with respect to the guide material pair 47 by being guided by both guide rails 48 and 49. As shown in FIG. 2, the lower guide rail 49 has a predetermined length in the bag transfer direction (the same direction as the bag 11 transferred by the push conveyor 14) after the moving body 50 is moved forward along the guide material pair 47. A guide portion 49a that is moved and then retracted is formed. Each movable body 50 has a pair of spreading members 40, 40 that are separated from each other in the bag transfer direction in the posture of moving along the upper and lower guide rails 48, 49 so as to be horizontally rotatable. And the front end portion thereof is configured to be close to and away from (opening and closing) each other in a direction along the bag transfer direction. Each of the pair of guide members 47 is provided with cams 51 that are fixed in position between the two expanding members 40, 40, and cam surfaces 51a, 51a formed on both front and rear sides of the cam 51 in the bag transfer direction. The cam followers 52 and 52 pivotally supported at the rear end portions of the two expanding members 40 and 40 come into contact with each other so as to be able to roll. Each expansion member 40 is urged by a spring 53 stretched between the expansion body 40 and the cam follower 52 so as to always come into contact with the corresponding cam surface 51a. Further, the expanding members 40, 40 that move in the downward movement area (the shaping operation area that expands the bag mouth portion 11b) are approximately 1 / the height of the article 12 accommodated in the bag 11, as shown in FIG. Positioning is set to correspond to position 2.
[0020]
The cam surfaces 51a and 51a of the cam 51 are guided via cam followers 52 and 52 when the movable body 50 is guided by the guide portion 49a of the lower guide rail 49 and moves forward with respect to the guide material pair 47. The front end portions of the pair of expanding members 40 are separated (opened) from each other, and the front end portions are set close to each other (closed) when the movable body 50 moves backward. In addition, the position where the guide member 49a is formed is set so that the position where the expanding members 40, 40 move forward corresponds to the position where the bag opening 11b is opened by the opening means 18. That is, the expanding members 40, 40 move in the downward movement area in the same direction as the bag 11 (downstream in the bag transfer direction) at substantially the same speed as the speed of the push conveyor 14 and the first suction belt 22, The bag mouth portion 11b is shaped into a substantially horizontal flat state by entering into the opened bag mouth portion and opening along the bag transport direction, and then is closed and retracted out of the bag mouth portion. . In the embodiment, the opening / closing mechanism 41 is composed of the guide material pair 47, the movable body 50, the lower guide rail 49, and the cam 51 described above.
[0021]
[Seal means]
The sealing means 20 is disposed on the adjustment body 26 and has a pair of heating rollers 54, 54 opposed to each other in the vertical direction, and the contact position of both the heating rollers 54, 54 is transferred by the push conveyor 14. The positioning is set so as to correspond to the position of approximately half the height of the article 12 contained in the bag 11 (see FIG. 8). That is, the bag mouth part 11b shaped into a flat state by the shaping means 19 is configured to pass between the two heating rollers 54 and 54 so as to apply a belt-like seal to the bag mouth part 11b. In addition, the rotational speed of both the heating rollers 54 and 54 is set to be substantially the same as the speed of the push conveyor 14. The sealing means 20 is disposed so as to be movable in the front-rear direction (a direction perpendicular to the bag transfer direction) with respect to the adjustment body 26, and the position of the sealing means 20 (heating rollers 54, 54) is set. The seal position from the opening edge of the bag mouth portion 11b can be changed by adjusting the movement in the front-rear direction by a position adjusting means (not shown). As the position adjusting means, for example, a screw shaft provided on the adjusting machine body 26 is screwed with an appropriate member in the sealing means 20, and the position of the sealing means 20 is adjusted by rotating the screw shaft. Various other mechanisms can be used, although they can be employed.
[0022]
[Holding means]
As shown in FIG. 1, a bag mouth portion 11 b that is flattened by the spreading members 40, 40 below the spreading area of the spreading members 40, 40 is formed by the first suction belt 22. A holding means 55 for adsorbing and holding from the lower side on the bag body side from the placement holding position of the bag mouth portion 11b is disposed. As shown in FIG. 2, the holding means 55 has a second suction belt 57 for holding disposed along the feed conveyor 14, and the uppermost runway (push conveyor) of the second suction belt 57. 14), the flattened bag mouth portion 11b is sucked and held on the substantially horizontal belt upper surface as it is. . That is, the second suction belt is attached to the plurality of pulleys 59 rotatably disposed on the second frame 58 (see FIG. 8) integrally disposed on the adjustment body 26 and spaced apart in the bag transfer direction. 57 is wound so as to circulate. The second suction belt 57 circulates at substantially the same speed as the speed of the push conveyor 14 and the first suction belt 22, and the bag mouth portion suction area of the second suction belt 57 and the sealing means 20. Is set so that the level with the part where both the heating rollers 54 and 54 abut substantially coincides.
[0023]
The second suction belt 57 has a plurality of suction holes 57a at predetermined intervals in the running direction. A second suction chamber 60 disposed on the second frame 58 and connected to a suction source (not shown) is in contact with the lower surface side of the bag mouth portion suction area of the second suction belt 57 and is transferred by the push conveyor 14. In the state in which the bag mouth portion 11b of the bag 11 is sucked and held on the substantially horizontal belt upper surface by the suction force acting through the through hole 60a (see FIG. 2) on the upper surface of the second suction chamber 60 and the suction holes 57a. It is configured to transfer downstream. As shown in FIG. 2, the second suction belt 57 and the second suction chamber 60 travel in positions that do not interfere with the heating rollers 54, 54 of the sealing means 20, and the downstream end thereof is the heating roller 54. , 54 is set on the downstream side of the arrangement position, and the bag mouth portion 11b is sucked and held in a flat state by the second suction belt 57 even during sealing.
[0024]
An upper guide 61 disposed on the adjustment body 26 and guiding the upper side of the bag mouth portion 11b is provided above the bag mouth portion 11b in a flat state sucked and held by the second suction belt 57. It is arrange | positioned in the range corresponding to a mouth part adsorption | suction area, and is comprised so that the bag mouth part 11b of a flat state may not open carelessly. That is, the bag mouth portion 11b that has been flattened by the expanding members 40, 40 has the upper side thereof held by the upper guide 61 and the lower side thereof held by the second suction belt 57. It is configured to be sealed by the heating rollers 54 and 54 (see FIG. 8).
[0025]
[Bundling means]
A known bundling means 21 is disposed downstream of the sealing means 20, and the bag mouth portion 11b is sandwiched between the bag mouth portion 11b to which the bag 11 to be transferred by the push conveyor 14 is sealed. It is configured to attach and tie a binding tool (both not shown) while pinching.
[0026]
[Effect of the embodiment]
Next, the operation of the sealing device according to the embodiment will be described. The bag 11 carried out by the carry-out conveyor 13 of the bagging machine is delivered to the table 15 with the bag mouth directed to the upstream side in the carry-out direction, and the bag body 11a is placed thereon. The bag 11 is transported toward the downstream side by a feeding body 17 of the feeding conveyor 14 in a posture in which the opening edge is aligned with the bag transporting direction. At this time, the bag mouth portion 11b extending outwardly from the rear side of the push conveyor 14 is approximately half the height of the article 12 accommodated in the bag 11 or slightly lower than the height. As shown in FIG. 2, while being sucked and held by the first suction belt 22 from the lower side, it is transported to the downstream side at substantially the same speed as the conveyor 14.
[0027]
At the timing when the bag 11 transferred by the push conveyor 14 arrives at a predetermined position, the suction cups 23, 23 held at the downward movement position by the air cylinder 37 of the opening means 18 are rotated by the rotating means 24. It closely contacts from above toward the bag mouth portion 11b, and moves downstream at the same speed with the bag mouth portion 11b sandwiched between the first suction belt 22 and the bag. When the holder 36 arrives at the lowest position, the suction cups 23, 23 are moved up to the upper movement position by the air cylinder 37, and the holder 36 is rotated toward the uppermost position by the rotating means 24. Thus, the suction cups 23 and 23 are separated from the first suction belt 22. At this time, since the lower film in the bag mouth portion 11b is sucked and held by the first suction belt 22, the upper film sucked and held by the suction cups 23 and 23 is lifted upward, so that the bag mouth The part 11b is opened.
[0028]
When the opening means 18 opens the bag mouth portion 11b, the expanding members 40, 40 of the shaping means 19 that are moved in the lower moving area in the same direction as the bag 11 by the moving mechanism 42 include the opening / closing mechanism. As shown in FIG. 2, the bag mouth portion 11 b is flattened by moving forward by 41 and entering the bag mouth portion, and then opening both the expanding members 40 and 40 in the direction along the bag transport direction while moving forward. It is shaped into a state. The suction by the suction cups 23, 23 is released at the timing after the expanding members 40, 40 have entered the bag opening, and the bag opening 11b is released from the suction cups 23, 23.
[0029]
The bag mouth portion 11b that has been flattened by the expanding members 40, 40 is located downstream of the first suction belt 22 and the second suction belt 57 of the holding means 55 while being sucked and held from below. Be transported. When the bag 11 is transferred to the vicinity of the position where the sealing means 20 is disposed, the expansion members 40, 40 that have moved in the same direction together with the bag 11 are closed by the action of the opening mechanism 41 and the bag mouth portion. Exit outside. Further, the bag mouth portion 11b whose lower side is sucked and held by the belts 22 and 57 is held by the upper guide 61 on the upper side, and the bag mouth portion 11b is prevented from being inadvertently opened and kept flat. As it is, it is transferred toward the sealing means 20.
[0030]
The bag mouth portion 11b in the flat state passes between the pair of heating rollers 54, 54 in the sealing means 20, and at this time, a belt-like seal is applied. The second adsorbing belt 57 in the holding means 55 extends to the downstream side of the sealing means 20, and the bag mouth portion 11b is adsorbed and held from the lower side during the sealing, so that the sealing is performed well.
[0031]
The bag mouth portion 11b to which the bag 11 to be transferred downstream by the push conveyor 14 is sealed is attached by the binding means 21 in a state of being held by the holding means, and the bag mouth portion 11b. Are bound by a binding tool.
[0032]
In the sealing device 10 according to the embodiment, the article 12 is bulky because the pair of expansion members 40 and 40 are flattened before sealing the bag mouth portion 11b of the bag 11 in which the article 12 is accommodated. Even in the case of things, a good seal can be applied. Moreover, since the bag mouth portion 11b is previously opened by the opening means 18, the expanding member 40 can be reliably inserted into the bag mouth portion 11b. Further, the suction cups 23 and 23 and the expanding members 40 and 40 perform opening and flattening processes while moving at substantially the same speed in the same direction as the bag 11 transported by the push conveyor 14. Continuous transfer is possible and high speed operation is possible.
[0033]
When the height of the article 12 accommodated in the bag 11 is changed, the adjustment mechanism 27 is operated to adjust the position of the adjustment body 26 so that the adjustment body 27 is disposed on the adjustment body 26. The first suction chamber 30, the pulley 29 of the first suction belt 22, the rotation means 24 (suction cups 23, 23) of the opening means 18, the shaping means 19, the second suction chamber 60 of the holding means 55 and the second suction. The pulley 59 and the sealing means 20 of the belt 57 are adjusted integrally, and can easily correspond to the center position in the vertical direction of the article 12 (bag opening) accommodated in the bag 11 transferred by the push conveyor 14. Further, the sealing position from the opening edge of the bag mouth portion 11b can be arbitrarily changed by adjusting the position of the sealing means 20 back and forth by the position adjusting means.
[0034]
[Another example]
9 and 10 show another embodiment of the bag mouth portion sealing device, and the basic configuration is the same as that of the above-described embodiment. Are given the same reference numerals.
[0035]
[Article detection sensor]
In the bag mouth portion sealing device 71 of another embodiment, the articles 12 are arranged at predetermined intervals by the feeding bodies 17 of the feeding conveyor 14 upstream of the suction position of the bag mouth portion 11b by the suction cups 23, 23 of the opening means 18. A photoelectric article detection sensor 63 for detecting whether or not the bag 11 containing the bag is being transferred (detection of presence or absence) is disposed. When the bag 11 is not detected by the article detection sensor 63, the opening means 18 opens the bag mouth portion 11b, that is, the suction action of the suction cups 23, 23, and the suction cup 23, 23 of the air cylinder 37. 23 is set to pause. As a result, when the empty pusher 17 that has not pushed the bag 11 arrives at the suction position, unnecessary operation of the opening means 18 is suppressed.
[0036]
[Holding means]
The holding means 65 of another embodiment replaces the second suction belt 57 that sucks and holds the bag mouth portion 11b from the lower side as in the above-described embodiment, and transports the bag mouth portion 11b while sandwiching the top and bottom. Endless support belts 66 and 67. That is, the holding means 65 includes a lower support belt 67 as a lower support member for placing and transferring the bag mouth portion 11b flattened by the expanding members 40, 40 of the shaping means 19, and a bag mouth. And an upper support belt 66 as an upper support member that supports the portion 11b from above, and is configured to be transported toward the sealing means 20 with the bag mouth portion 11b sandwiched between the support belts 66 and 67. Yes. Each of the upper and lower support belts 66 and 67 is set so as to circulate along the bag transfer direction at substantially the same speed as the speed of the push conveyor 14 and the first suction belt 22. As shown in FIG. 10, the sandwiching position of the bag mouth portion 11b by the both support belts 66 and 67 is the most advanced position when the expansion members 40 and 40 are expanded (closest to the bag body side). The position of the expansion member 40, 40 and the upper support belt 66 is set so as not to interfere with each other.
[0037]
As shown in FIG. 9, the lower support belt 67 is formed by the expanding members 40, 40. Under The upper runway is set so as to extend horizontally from the upstream side to the position beyond the sealing means 20 from the direction moving area (shaping operation area). On the other hand, the upper support belt 66 extends horizontally along the lower support belt 67 from the downstream side in the downward movement area of the spreading members 40, 40 to the position beyond the sealing means 20. The bag mouth portion 11b when being sealed by the sealing means 20 is transferred while being sandwiched between the upper and lower support belts 66 and 67, so that the sealing can be performed satisfactorily. . Another In the holding means 65 of the embodiment, the upper and lower support belts 66 and 67 are lightly sandwiched and supported to such an extent that the bag mouth portion 11b can be maintained in a flat state, but may be securely sandwiched with a predetermined pressure.
[0038]
Note that the levels of the upper horizontal running path of the lower support belt 67 and the contact portions of the heating rollers 54 and 54 in the sealing means 20 are set to substantially coincide. The holding means 65 composed of the upper support belt 66 and the lower support belt 67 corresponds to the height of the article 12, and includes a first suction belt 22 (bag mouth conveying means), opening means 18, and shaping means. 19 and the sealing means 20 are configured to adjust the position in the height direction integrally.
[0039]
[Abnormality detection sensor]
Here, in the bagged product carried out from the bagging machine to the bag mouth portion sealing device 71, a part of the article 12 to be accommodated in the bag body portion 11a of the bag 11 is present in the bag mouth portion 11b. When the processing is performed by the opening means 18 and the shaping means 19 on the downstream side, these means 18 and 19 damage the article 12, or the article 12 is bitten by the opening means 18 and the shaping means 19 etc. Therefore, there is a possibility that these means 18 and 19 may break down. Therefore, in another embodiment, an abnormality detection sensor 64 that detects whether or not the article 12 is present in the bag mouth portion 11b is provided. This abnormality detection sensor 64 has a detection piece 64a that can tilt toward the position where the article 12 can come into contact with, on the upstream side of the holding means 65, above the lower support belt 67 constituting the holding means 65. The abnormality is detected when the article 12 comes into contact with the detection piece 64a from the upstream side and is tilted, and at this time, the operation of the sealing device 71 itself is controlled to be stopped. That is, it is possible to prevent the bag mouth portion 11b in which the article 12 is present from being processed by the opening means 18 and the shaping means 19 and causing a failure.
[0040]
[Deaeration means]
As deaeration means for blowing compressed air from above toward the bag mouth portion 11b slightly upstream from the upstream end of the upper support belt 66 to discharge the air in the bag mouth portion 11b. An air spray nozzle 68 is provided. The air blowing nozzle 68 faces between the bag mouth part 11b and the bag body part 11a which are flattened by the expanding members 40, 40 of the shaping means 19, and the film is separated vertically. The bag 11 is positioned so as to blow compressed air toward the bag mouth 11b, and air is released from the entire bag mouth 11b so that the bag 11 has a shape along the article 12 and the holding means 65. A portion sandwiched between the upper and lower support belts 66 and 67 is formed in a substantially flat shape so that the bag mouth portion 11b is smoothly introduced between the belts 66 and 67.
[0041]
[Entrainment prevention means]
The sealing surface of the upper heating roller 54 in the sealing means 20 is set to have an uneven shape, and the bag mouth portion 11b is held at a predetermined pressure by the lower heating roller 54 with the sealing surface set to a flat surface and rotated. Thus, the sealing part is applied to the sealing part applied to the bag mouth part 11b. In this case, there is a possibility that the bag mouth portion 11b sealed by the upper heating roller 54 having a concavo-convex seal surface is attached to the upper heating roller 54 and rolled up. In order to prevent this, in another embodiment, the bag mouth portion 11b is transported within a predetermined range from the upstream side to the downstream side in the bag transport direction across the sandwiching position of the bag mouth portion 11b by the heating rollers 54, 54. An anti-rolling means 69 for guiding along the direction is provided.
[0042]
The entanglement preventing means 69 circulates at a position substantially above the bag mouth portion 11b transferred by the holding means 65 at a speed substantially the same as the speed of the holding means 65 on the rear side of the holding position of the heating rollers 54, 54. It has an endless belt 70 that travels, and a horizontal traveling path below the belt 70 is set so as to extend within a predetermined range from the upstream side to the downstream side in the bag transfer direction across the clamping position. An endless belt 70 traveling toward the downstream side along the horizontal traveling path is configured to support and guide the upper surface of the bag mouth portion 11b. That is, when the bag mouth portion 11b is sealed by both the heating rollers 54, 54, the upper surface on the opening edge side is supported and guided by the endless belt 70, so that the upward rise of the bag mouth portion 11b is prevented. And a good seal is achieved. Further, the entanglement preventing means 69 is configured such that the position adjustment in the height direction is performed integrally with the sealing means 20 corresponding to the height of the article 12.
[0043]
In another embodiment in which one heating roller 54 set on an uneven seal surface that may cause the bag mouth portion 11b to be wound is provided on the upper side, the endless belt 70 is connected to the bag mouth portion 11b. Although provided above the transfer path, when the sealing surface of the heating roller 54 provided on the lower side is set to be uneven, a configuration in which the endless belt 70 is disposed below the transfer path of the bag mouth portion 11b. Adopted. Moreover, the endless belt 70 may be provided up and down as needed, and the bag mouth portion 11b may be guided while being transported toward the downstream side while being sandwiched between the upper and lower endless belts 70 and 70. However, when the sealing surfaces of both the upper and lower heating rollers 54 are set to be flat, the entanglement preventing means 69 can be omitted.
[0044]
In addition, in the bag mouth portion sealing device 71 of another embodiment, in addition to performing the same operation as the sealing device 10 of the above-described embodiment, the empty feeding body 17 that is not pushing the bag 11 includes the opening When the suction position of the means 18 is reached, this can be detected by the article detection sensor 63, and the suction and lowering of the suction cups 23, 23 in the opening means 18 can be stopped, and the opening means 18 is wasted. The movement can be suppressed. Further, when the abnormality detection sensor 64 detects that the article 12 is present in the bag mouth portion 11b, the operation of the sealing device 71 is stopped and controlled so that the opening means 18 and the shaping means on the downstream side. 19 and the holding means 65 (upper and lower support belts 66 and 67) and the like are prevented from being damaged by the article 12 being damaged or biting the article 12.
[0045]
Further, by blowing compressed air from the air blowing nozzle 68 onto the bag body 11a side portion of the bag mouth portion 11b that is flattened by the expanding members 40, 40 of the shaping means 19, the bag mouth Air bleeding in the portion 11b is achieved. Thereby, the site | part pinched by the said upper and lower support belts 66 and 67 in the bag opening part 11b becomes substantially flat shape, and the bag opening part 11b is smoothly introduce | transduced between both the support belts 66 and 67. FIG. Moreover, since the air release of the whole bag mouth part 11b is achieved suitably, a tight packaging body is obtained.
[0046]
Furthermore, when the bag mouth portion 11b is sealed by the sealing means 20, the bag mouth portion 11b on the bag body 11a side from the sealing position is transferred while being sandwiched between the upper and lower support belts 66, 67. It can be performed well. In addition, since the upper surface of the opening edge side from the sealing position of the bag mouth portion 11b is guided and supported by the endless belt 70 in correspondence with the upper heating roller 54 having the uneven surface, the bag mouth portion 11b is on the upper side. Therefore, it is possible to prevent the heat roller 54 from being wound, and a better seal can be achieved.
[0047]
[Example of change]
In the embodiment, the bag is transported horizontally, but the entire apparatus may be tilted so that the bag mouth of the bag faces obliquely upward. Moreover, as a transfer means, it can replace with the push conveyor of an Example, and can employ | adopt a belt conveyor. Further, the bag mouth transporting means is not limited to the suction belt, and other various systems that can run while holding the bag mouth portion without being displaced, such as an adhesive belt that can hold the bag mouth portion by sticking. Can be adopted.
[0048]
As for the sealing means, instead of the heating roller of the embodiment, a sealing bar is provided so as to face the top and bottom, and the sealing bar moves with the bag while maintaining a clamping state with respect to the bag mouth portion, so-called box motion is performed. May be. The number of suction cups need not be two as in the embodiment, and may be set to one or three or more appropriate numbers according to the length of the bag mouth portion in the bag transfer direction. As for the opening means, the rotation means of the suction cup is not limited to the configuration of the embodiment. For example, the suction cup is disposed on a belt or chain wound around a pulley or sprocket disposed in a predetermined arrangement, The suction cup may be configured to move toward and away from the bag mouth (up and down movement) as the belt or chain travels. Moreover, the structure which carries out the operation | movement similar to an Example can be employ | adopted by providing separately the means to raise / lower a suction cup, and the means to move back and forth along a bag transfer direction. Further, the opening / closing mechanism and the moving mechanism of the shaping means are not limited to the configuration of the embodiment, and a configuration in which the expanding member is opened / closed by the fluid pressure cylinder or reciprocated along the bag transfer direction can be appropriately employed. Furthermore, the bag mouth conveying means, the opening means, the shaping means, the holding means, and the sealing means may each include a position adjusting means that can adjust the position corresponding to the position of the bag mouth portion.
[0049]
In addition, the article detection sensor, the abnormality detection sensor, the deaeration unit, and the roll-in prevention unit that are employed in another embodiment can be appropriately employed in the apparatus of the embodiment. In addition, the winding prevention means may be configured to prevent winding of the bag mouth portion to the heating roller, such as a configuration in which a plurality of freely rotatable rollers are arranged in parallel in the bag transfer direction instead of the endless belt, Other configurations may be employed.
[0050]
【The invention's effect】
As described above, according to the bag mouth portion sealing device according to claim 1 of the present invention, since the bag mouth portion can be sealed with the expanding member in a flat state, a good seal can be obtained. . Moreover, since the expansion member makes the bag mouth portion flat while moving in the same direction with respect to the bag to be transferred, the bag can be continuously transferred and can be operated at high speed.
[0051]
According to the bag mouth portion sealing device according to claim 2, since the bag mouth portion is sucked and held by the suction belt disposed opposite to the suction member, the opening of the bag mouth portion can be reliably performed. it can. Further, according to the bag mouth portion sealing device according to claim 3, the position of the bag mouth conveying means, the opening means, the shaping means, the holding means and the sealing means can be adjusted according to the size of the article accommodated in the bag. Since the bag mouth portion is always in a flat state corresponding to the center position of the article, a good seal can be obtained. Furthermore, according to the bag mouth portion sealing device according to the fourth aspect, the sealing position with respect to the bag mouth portion by the sealing means can be adjusted, so that the seal position from the opening edge of the bag mouth portion can be arbitrarily changed. is there. Furthermore, according to the bag mouth portion sealing device according to the fifth aspect, the effect of preventing the entry of foreign matters becomes more prominent than that in which the bag mouth portion is simply bound.
[0052]
According to the bag mouth portion sealing device according to claim 6, since the bag mouth portion when being sealed by the sealing means is transported in a state sandwiched between the pair of support members, the sealing means can be well sealed. Can do. According to the bag mouth portion sealing device according to claim 7, the bag mouth portion between the pair of support members can be smoothly smoothed by blowing compressed air to the bag mouth portion on the upstream side of the upper support member. Implementation is achieved. According to the bag mouth portion sealing device of the eighth aspect, when the article detection sensor for detecting the presence / absence of the bag containing the article upstream from the suction position of the opening means does not detect the bag, the operation of the opening means is suspended. And it can suppress wasteful movement. According to the bag mouth portion sealing device of the ninth aspect, the bag mouth portion when being sealed by the sealing means is guided along the bag transfer direction by the entrainment preventing means, so that the bag mouth portion to the heating roller is Entrainment can be prevented. Further, according to the bag mouth portion sealing device according to the tenth aspect, when the abnormality detection sensor detects that an article is present in the bag mouth portion, the operation of the bag mouth portion sealing device is stopped. It is possible to prevent a failure of these means by damaging the article in each means or by biting the article.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a bag mouth portion sealing apparatus according to a preferred embodiment of the present invention.
FIG. 2 is a schematic plan view showing a bag mouth portion sealing apparatus according to an embodiment.
FIG. 3 is a schematic front view showing a main part of the opening means according to the embodiment.
FIG. 4 is a schematic plan view showing a main part of the opening means according to the embodiment.
FIG. 5 is a schematic side view showing a main part of the opening means according to the embodiment.
FIG. 6 is a schematic plan view showing the main part of the shaping means according to the embodiment.
FIG. 7 is a schematic side view illustrating the main parts of a push conveyor, a shaping unit, and a holding unit according to the embodiment.
FIG. 8 is a schematic side view showing the main parts of a push conveyor, holding means and sealing means according to an embodiment.
FIG. 9 is a schematic front view showing a bag mouth portion sealing apparatus according to another preferred embodiment of the present invention.
FIG. 10 is a schematic plan view showing a bag mouth portion sealing device according to another embodiment.
[Explanation of symbols]
10 Bag mouth seal device
11 bags
11a Bag body
11b Bag mouth
12 Goods
14 Pushing conveyor (transfer means)
18 Opening means
19 Shaping means
20 Sealing means
21 Bundling means
22 First suction belt (bag mouth conveying means)
23 Suction cup (Suction member)
26 Airframe for adjustment (position adjustment means)
27 Adjustment mechanism (position adjustment means)
40 Expanding member
55 Holding means
63 Article detection sensor
64 Abnormality detection sensor
65 Holding means
66 Upper support belt (upper support member)
67 Lower support belt (lower support member)
68 Air spray nozzle (deaeration means)
69 Means for preventing entrainment
71 Bag mouth seal device

Claims

The bag body (11a) of the bag (11) unloaded from the bagging machine that houses the article (12) is placed in the bag (11), and the bag (11) is directed toward the direction intersecting the unloading direction. A transfer means (14) for transferring the opening edge in a posture along the bag transfer direction; and
Traveling at substantially the same speed as the speed of the transfer means (14), the bag mouth transport means for transporting the bag mouth portion (11b) of the bag (11) toward the downstream side in the bag transport direction by placing and holding the bag mouth portion (11b). 22) and
The bag mouth portion (11b) transferred by the bag mouth transport means (22) is set to be movable up and down, and the bag mouth portion (11b) is lifted by adsorbing the bag mouth portion (11b). In the state where the adsorbing member (23) is opened and the adsorbing member (23) sandwiches the bag mouth portion (11b) by the bag mouth conveying means (22), the bag mouth conveying means (22) is at substantially the same speed. Opening means (18) set to move toward the downstream side in the bag transfer direction; and
A pair of expanding members that enter the bag mouth portion of the bag (11) opened by the opening means (18) and open the bag mouth portion (11b) in a flat state by opening along the bag transfer direction ( 40, 40), and the expanding member (40, 40) has the bag mouth portion (11b) in a flat state in an expanded state, and the bag is opened at substantially the same speed as the bag mouth conveying means (22). Shaping means (19) set to move towards the downstream side in the transfer direction;
The bag mouth travels at a speed substantially the same speed of the conveyor means (22), said shaping means (19) at the bag mouth portion to be a flat state (11b), mounting that put in the bag mouth conveying means (22) A holding means (55, 65) for supporting the bag body (11a) from the holding position and transferring the bag toward the downstream side in the bag transfer direction;
A bag mouth portion sealing device comprising sealing means (20) for sealing the bag mouth portion (11b) transferred in a flat state by the holding means (55, 65).

The bag mouth portion sealing device according to claim 1, wherein the bag mouth conveying means is an adsorption belt (22) for adsorbing the bag mouth portion (11b).

The bag mouth conveying means (22), the opening means (18), the shaping means (19), the holding means (55, 65) and the sealing means (20) are provided for the article (12) accommodated in the bag (11). The bag mouth portion sealing device according to claim 1 or 2, further comprising position adjusting means (26, 27) capable of adjusting the position corresponding to the height.

The bag mouth portion sealing device according to any one of claims 1 to 3, wherein the sealing means (20) has position adjusting means capable of adjusting a sealing position from an opening edge of the bag mouth portion (11b).

The bag mouth portion sealing device according to any one of claims 1 to 4, wherein a binding means (21) of the bag mouth portion (11b) is disposed downstream of the sealing means (20).

The holding means (65) is configured to place the bag mouth portion (11b) and to exceed the seal means (20) when the shaping means (19) makes the bag mouth portion (11b) flat. The bag mouth portion (11b) is sandwiched between the traveling lower support member (67) and the lower support member (67) from the downstream side of the shaping means (19) to the position beyond the sealing means (20). An upper support member (66) that travels at a position where the bag mouth portion (11b) is sandwiched between the support members (66, 67) at the bag body portion side of the expansion member (40, 40). The bag mouth portion sealing device according to any one of claims 1 to 5, wherein the bag mouth portion sealing device is set at a position closer to the bag body portion than the leading end portion.

On the upstream side of the upper support member (66), a deaeration means (68) for discharging the air in the bag mouth portion by blowing compressed air toward the bag mouth portion (11b) is disposed. The bag mouth portion sealing device according to claim 6.

On the upstream side of the adsorption position location of the bag mouth by the suction member (23) of said opening means (18) (11b), the article detection sensor (63 for detecting the presence of the bag (11), wherein the accommodating an article (12) 8), and when the bag (11) is not detected by the sensor (63), the operation of the opening means (18) is set to be in a pause state. The bag mouth portion sealing device according to claim 1.

The sealing means (20) has a pair of heating rollers (54, 54) that sandwich the bag mouth portion (11b), and sandwiches the sandwiching position of the bag mouth portion (11b) by the heating rollers (54, 54). The entrainment preventing means (69) for guiding the bag mouth portion (11b) along the bag transfer direction in a predetermined range from the upstream side to the downstream side in the bag transfer direction is provided. Bag mouth seal device.

An abnormality detection sensor (64) for detecting whether or not the article (12) is present in the bag mouth portion (11b) is provided upstream of the holding means (55, 65), and the sensor (64 The bag mouth portion sealing device according to any one of claims 1 to 9, which is set so as to stop the operation of the device (10, 71) when the presence of the article (12) is detected.