JP4326082B2

JP4326082B2 - Bag making and packaging machine

Info

Publication number: JP4326082B2
Application number: JP23644199A
Authority: JP
Inventors: 雅夫福田
Original assignee: Ishida Co Ltd
Current assignee: Ishida Co Ltd
Priority date: 1998-08-25
Filing date: 1999-08-24
Publication date: 2009-09-02
Anticipated expiration: 2019-08-24
Also published as: JP2000142636A

Description

【０００１】
【発明の属する技術分野】
本発明は、帯状フィルムを包装袋に成形しながら該包装袋に物品を封入する製袋包装機に関し、包装技術の分野に属する。
【０００２】
【従来の技術】
一般に、包装袋を成形しながら該包装袋に物品を封入する製袋包装機は、帯状の包材を物品投入用シュートの周囲で筒状に曲成して該包材の左右の両側縁部を重ね合わせ、縦シール装置により上記重ね合わせ部を熱溶着し、また横シール装置により筒状包材を幅方向にそれぞれ熱溶着して物品をその包材に封入するように構成されている。
【０００３】
その中で、上記縦シール装置による熱溶着は、例えば、加熱されたヒータブロックを間欠的にシュートに対接離反させ、上記包材の左右両側縁部を該ブロックとシュート前面との間に挟み付けて押圧したり（間欠搬送）、あるいは、一対のプーリに巻き掛けられて走行し、且つ加熱された金属製のヒータベルトを連続的にシュートに対接させ、上記包材の左右両側縁部を該ブロックとシュート前面との間に挟み付けて押圧したり（連続搬送）することにより行われる。
【０００４】
その場合に、間欠搬送方式における上記ヒータブロック、あるいは、連続搬送方式における上記ヒータベルト（以下、これらを単に「ヒータ」という。）は、いずれにおいても、該ヒータがシュートに対接して包材を溶着する溶着位置と、ヒータがシュートから離反する退避位置との間で移動されるようになっている。すなわち、間欠搬送方式の場合は、包材が搬送される間、ヒータが退避位置に移動し、一方、連続搬送方式の場合は、例えば、作業上のトラブルが発生して包材の搬送が一時的に停止されるときに、包材の過加熱を避けるためにヒータが退避位置に移動する。
【０００５】
一方、ヒータが溶着位置にある場合は、該ヒータが包材を溶着するべく所望の圧力で該包材をシュートに押し付けるのであるが、そのときのヒータの押圧は、従来よりバネの付勢力を用いて行われており、その押圧力の調整は手動で行われていた。
【０００６】
【発明が解決しようとする課題】
ところで、上記シュートは、例えば、包装機本体への取り付け方によって取付位置が微妙に変化したり、ヒータの押圧や長年の使用等によって変形するという場合がある。この場合、ヒータの溶着位置が変化し、ひいては、ヒータの押圧力が変化することになり、上記溶着位置が変化するたびにバネの弾性力を調整し直さなければならなかった。
【０００７】
また、上記バネの弾性力の手動による調整は正確性に欠けると共に、近年では、上記ヒータの押圧力が、フィルムの厚みや材質等に関する特性や、例えば、ラップシールやフィンシール等のフィルムのシール方法、あるいは、製袋包装機の稼働能力や稼働条件に対応できるようにすることが望まれており、上記押圧力をそれらの要素に応じてきめ細かく設定する必要が生じている。
【０００８】
一方、前述したように、このようなヒータの押圧力の微妙な調整とはまた別に、ヒータを溶着位置と退避位置との間で移動させることが必要とされているのであるが、この移動は応答性が重視され、なるべく瞬時にヒータが上記両位置間で移動することが望まれる。したがって、その移動のための駆動力としては比較的大きな力が必要となり、この点で、上記のヒータの押付力の微妙な調整とは異質の制御が必要となる。そして、これらの相互に異なる制御のための力をそれぞれどのようにして共に単一のヒータに作用させるかが問題となる。
【０００９】
そこで、本発明は、ヒータを溶着位置と退避位置との間で応答性よく移動させる制御と、その溶着位置におけるヒータの押圧力の微妙な制御とをそれぞれ効率よく両立させることのできる製袋包装機を提供することを課題とする。
【００１０】
【課題を解決するための手段】
すなわち、本発明は、上記課題を解決するため、次のように構成したことを特徴とする。
【００１１】
まず、請求項１に記載の発明（以下、「第１発明」という。）は、シュート部材の周囲で曲成された包材の左右両側縁部の重なり部分を、上記シュート部材に対して対接離反可能なヒータ部材でシュート部材に押し付けることにより溶着する製袋包装機において、上記重なり部分にヒータ部材が接触する溶着位置と接触しない退避位置との間における該ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整とを行うエアシリンダが備えられ、該エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧または押付力調整用の低圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する空気圧生成手段と、該生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記両位置間で移動させるときに上記エアシリンダに供給され、上記生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記エアシリンダに供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とが設けられていることを特徴とする。
【００１２】
また、請求項２に記載の発明（以下、「第２発明」という。）は、第１発明において、切換手段により、押付力調整用空気圧がエアシリンダに供給されるように切り換えられたときに、所定の時間だけヒータ部材移動用空気圧を押付力調整用空気圧に付加する制御手段が設けられていることを特徴とする。
【００１３】
次に、請求項３に記載の発明（以下、「第３発明」という。）は、シュート部材の周囲で曲成された包材の左右両側縁部の重なり部分を、上記シュート部材に対して対接離反可能なヒータ部材でシュート部材に押し付けることにより溶着する製袋包装機において、上記重なり部分にヒータ部材が接触する溶着位置と接触しない退避位置との間における該ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整とを行うエアシリンダが備えられ、該エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する第１の空気圧生成手段と、押付力調整用の低圧の空気圧を上記供給源から供給される空気圧を元圧として生成する第２の空気圧生成手段と、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記両位置間で移動させるときに上記エアシリンダに供給され、上記第２の空気圧生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記エアシリンダに供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とが設けられていることを特徴とする。
【００１４】
また、請求項４に記載の発明（以下、「第４発明」という。）は、第３発明において、切換手段により、押付力調整用空気圧がエアシリンダに供給されるように切り換えられたときに、所定の時間だけ第１の空気圧生成手段がヒータ部材移動用空気圧を押付力調整用空気圧に付加するように制御する制御手段が設けられていることを特徴とする。
【００１５】
そして、請求項５に記載の発明（以下、「第５発明」という。）は、シュート部材の周囲で曲成された包材の左右両側縁部の重なり部分を、上記シュート部材に対して対接離反可能なヒータ部材でシュート部材に押し付けることにより溶着する製袋包装機において、上記重なり部分にヒータ部材が接触する溶着位置への該ヒータ部材の移動、及び、接触しない退避位置への上記ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整を行うエアシリンダが備えられていると共に、該エアシリンダには、ヒータ部材を上記退避位置に移動させるときに空気圧が供給される第１のエア室と、ヒータ部材を上記溶着位置に移動させるとき、もしくはヒータ部材の押付力を調整するときに空気圧が供給される第２のエア室とが設けられており、上記エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する第１の空気圧生成手段と、押付力調整用の低圧の空気圧を上記供給源から供給される空気圧を元圧として生成する第２の空気圧生成手段と、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧がヒータ部材を上記退避位置に移動させるときに上記第１のエア室に供給され、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記溶着位置に移動させるときに上記第２のエア室に供給され、上記第２の空気圧生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記第２のエア室に供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とが設けられていることを特徴とする。
【００１６】
また、請求項６に記載の発明（以下、「第６発明」という。）は、第５発明において、切換手段により、押付力調整用空気圧が第２のエア室に供給されるように切り換えられたときに、所定の時間だけ第１の空気圧生成手段が第２のエア室にヒータ部材移動用空気圧を押付力調整用空気圧に付加するように制御する制御手段が設けられていることを特徴とする。
【００１７】
次に、請求項７に記載の発明（以下、「第７発明」という。）は、第１発明ないし第６発明のいずれかにおいて、切換手段により、押付力調整用空気圧を供給するように切り換えられているときの該押付力調整用空気圧を可変制御する調整手段が設けられていることを特徴とする。
【００１８】
上記第１〜第７発明により、次のような作用が得られる。
【００１９】
まず、第１発明の製袋包装機によれば、重なり部分にヒータ部材が接触する溶着位置と接触しない退避位置との間における該ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整とを行うエアシリンダが備えられ、該エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧または押付力調整用の低圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する空気圧生成手段と、該生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記両位置間で移動させるときに上記エアシリンダに供給され、上記生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記エアシリンダに供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とを設けたので、該切換手段によりヒータ部材移動用空気圧がエアシリンダに供給されるように切り換えられることによって、ヒータ部材を溶着位置と退避位置との間で移動させることができると共に、上記切換手段により押付力調整用空気圧がエアシリンダに供給されるように切り換えられることによって、上記溶着位置におけるヒータ部材の押付力を調整することができる。その結果、エアシリンダによって、包材の厚みや材質等に関する特性等に応じてヒータ部材の押付力を正確に設定することができると共に、ヒータ部材の押付によるシュート部材の変形やシュート部材の長年の使用による変形等が起こってヒータ部材の溶着位置が変化しても、その変化に対応して常に設定された押付力でヒータ部材を押し付けることが可能となり、かつ、上記エアシリンダによって、上記溶着位置にあるヒータ部材の押圧力の微妙な制御が行え、したがって、ヒータ部材を溶着位置と退避位置との間で移動させる制御と、ヒータ部材の押圧力制御とをそれぞれ効率よく両立させて行うことができる。
【００２０】
また、第２発明の製袋包装機によれば、切換手段により、押付力調整用空気圧がエアシリンダに供給されるように切り換えられたときに、所定の時間だけヒータ部材移動用空気圧を押付力調整用空気圧に付加する制御手段を設けたので、ヒータ部材移動用空気圧の供給から押付力調整用空気圧の供給に切り換えられたときに、該押付力調整用空気圧に所定の時間だけ高圧のヒータ部材移動用空気圧が付加されることになり、その切換時に起こるエアシリンダの作動速度の低下を抑制することができる。
【００２１】
次に、第３発明の製袋包装機によれば、重なり部分にヒータ部材が接触する溶着位置と接触しない退避位置との間における該ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整とを行うエアシリンダが備えられ、該エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する第１の空気圧生成手段と、押付力調整用の低圧の空気圧を上記供給源から供給される空気圧を元圧として生成する第２の空気圧生成手段と、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記両位置間で移動させるときに上記エアシリンダに供給され、上記第２の空気圧生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記エアシリンダに供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とを設けたので、上記第１発明と同様に、該切換手段によりヒータ部材移動用空気圧がエアシリンダに供給されるように切り換えられることによって、ヒータ部材を溶着位置と退避位置との間で移動させることができると共に、上記切換手段により押付力調整用空気圧がエアシリンダに供給されるように切り換えられることによって、上記溶着位置におけるヒータ部材の押付力を調整することができる。その結果、エアシリンダによって、包材の厚みや材質等に関する特性等に応じてヒータ部材の押付力を正確に設定することができると共に、ヒータ部材の押付によるシュート部材の変形やシュート部材の長年の使用による変形等が起こってヒータ部材の溶着位置が変化しても、その変化に対応して常に設定された押付力でヒータ部材を押し付けることが可能となり、かつ、上記エアシリンダによって、上記溶着位置にあるヒータ部材の押圧力の微妙な制御が行え、したがって、ヒータ部材を溶着位置と退避位置との間で移動させる制御と、ヒータ部材の押圧力制御とをそれぞれ効率よく両立させて行うことができる。
【００２２】
また、第４発明の製袋包装機によれば、切換手段により、押付力調整用空気圧がエアシリンダに供給されるように切り換えられたときに、所定の時間だけ第１の空気圧生成手段がヒータ部材移動用空気圧を押付力調整用空気圧に付加するように制御する制御手段を設けたので、上記第２発明と同様に、ヒータ部材移動用空気圧の供給から押付力調整用空気圧の供給に切り換えられたときに、該押付力調整用空気圧に所定の時間だけ高圧のヒータ部材移動用空気圧が付加されることになり、その切換時に起こるエアシリンダの作動速度の低下を抑制することができる。
【００２３】
そして、第５発明の製袋包装機によれば、重なり部分にヒータ部材が接触する溶着位置への該ヒータ部材の移動、及び、接触しない退避位置への上記ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整を行うエアシリンダが備えられていると共に、該エアシリンダには、ヒータ部材を上記退避位置に移動させるときに空気圧が供給される第１のエア室と、ヒータ部材を上記溶着位置に移動させるとき、もしくはヒータ部材の押付力を調整するときに空気圧が供給される第２のエア室とが設けられており、上記エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する第１の空気圧生成手段と、押付力調整用の低圧の空気圧を上記供給源から供給される空気圧を元圧として生成する第２の空気圧生成手段と、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧がヒータ部材を上記退避位置に移動させるときに上記第１のエア室に供給され、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記溶着位置に移動させるときに上記第２のエア室に供給され、上記第２の空気圧生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記第２のエア室に供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とを設けたので、該切換手段によりヒータ部材移動用空気圧が第１のエア室に供給されるように切り換えられることによって、ヒータ部材を退避位置に移動させることができ、ヒータ部材移動用空気圧が第２のエア室に供給されるように切り換えられることによって、ヒータ部材を溶着位置に移動させることができ、押付力調整用空気圧が第２のエア室に供給されるように切り換えられることによって、溶着位置におけるヒータ部材の押付力を調整することができる。その結果、エアシリンダによって、包材の厚みや材質等に関する特性等に応じてヒータ部材の押付力を正確に設定することができると共に、ヒータ部材の押付によるシュート部材の変形やシュート部材の長年の使用による変形等が起こってヒータ部材の溶着位置が変化しても、その変化に対応して常に設定された押付力でヒータ部材を押し付けることが可能となり、かつ、上記エアシリンダによって、上記溶着位置にあるヒータ部材の押圧力の微妙な制御が行え、したがって、ヒータ部材を溶着位置と退避位置との間で移動させる制御と、ヒータ部材の押圧力制御とをそれぞれ効率よく両立させて行うことができる。
【００２４】
また、第６発明の製袋包装機によれば、切換手段により、押付力調整用空気圧が第２のエア室に供給されるように切り換えられたときに、所定の時間だけ第１の空気圧生成手段が第２のエア室にヒータ部材移動用空気圧を押付力調整用空気圧に付加するように制御する制御手段を設けたので、ヒータ部材移動用空気圧の第２のエア室への供給から押付力調整用空気圧の供給に切り換えられたときに、該押付力調整用空気圧に所定の時間だけ高圧のヒータ部材移動用空気圧が付加されることになり、その切換時に起こるエアシリンダの作動速度の低下を抑制することができる。
【００２５】
次に、第７発明の製袋包装機によれば、切換手段により、押付力調整用空気圧を供給するように切り換えられているときの該押付力調整用空気圧を可変制御する調整手段を設けたので、包材の厚み等に応じてヒータ部材による溶着時間等を調整することができる。
【００２６】
【発明の実施の形態】
以下、本発明の実施の形態について説明する。
【００２７】
図１に示すように、この実施の形態に係る製袋包装機１は、その機台２の後部上方に、図示しないが、フィルムロールを回転可能に支持するロール支持部が設けられていると共に、機台２の前部上方には、該ロールから前方へ繰り出された帯状のフィルムを下方へ案内しながら、その両側縁部を重ね合わせるように曲成するフォーマ３と、該フォーマ３により重ね合わされた帯状フィルムの両側縁部を溶着して筒状の包材とする縦シール装置４０と、この筒状包材内に上方から突入して、該筒状包材内に物品を投入する物品投入用シュート４とが設けられている。
【００２８】
なお、上記フォーマ３及びシュート４は機台２上に取り付けられた支持フレーム５に支持されている。
【００２９】
また、上記シュート４の高さ方向の略中央部における左右両側には、フィルム送り機構１０が設けられており、該送り機構１０は、詳しくは図示しないが、機台２に組み付けられたカバー部材１１に支持された上下一対のローラ１２，１２と、これらのローラ１２，１２に巻き掛けられ、筒状包材の左右両側部をそれぞれシュート４の左右両側面とで挟持するベルト部材１３と、上記ローラ１２，１２を所定の方向に回転させることにより、上記筒状包材を下方へ移送させるモータ（図示せず）等で構成されている。
【００３０】
そして、この包装機１における機台２内の下部には、横シール装置２０が配設されている。この横シール装置２０は、上記筒状包材の前後両側に配置された一対のバー部材２１，２１（一方のみ図示）と，該バー部材２１，２１を対接離反可能に支持する支持ユニット２２，２２とを有し、上記バー部材２１，２１は図示しないヒータにより加熱されている。
【００３１】
そして、前側のバー部材２１と後側のバー部材２１とが筒状包材を介して近接したときに、該筒状包材を上下２箇所で幅方向にシールすると共に、このとき、上記バー部材２１に内装されたカッタ（図示せず）が上記筒状包材を上下のシール部の中間で幅方向に切断するようになっている。
【００３２】
なお、図１に示すように、機台２の下方には、当該包装機１で製造された製品が載置される載置台３０が備えられている。
【００３３】
次に、上記縦シール装置４０について説明する。まず、該縦シール装置４０は、図２に示すように、本体フレーム６に回動自在に支持された回動フレーム４１に取り付られており、重ね合わされた包材の左右両側縁部を溶着するヒータユニット５０と、該ヒータユニット５０を支持すると共に上記回動フレーム４１に摺動自在に設けられた支持ユニット６０と、該支持ユニット６０ないし上記ヒータユニット５０をシュート４に対して近接離反方向に移動させる移動機構７０とで構成されている。
【００３４】
上記ヒータユニット５０は、図２及び図３に示すように、取付板５１に設けられた上下一対のプーリ５２，５２と、該プーリ５２，５２に巻き掛けられたヒータベルト５３と、上記プーリ５２，５２間に配置されて上記ヒータベルト５３を加熱するヒータブロック５４と、上記プーリ５２，５２を駆動してヒータベルト５３を走行させるモータ５５とで構成されている。
【００３５】
そして、このヒータユニット５０は、上記ヒータベルト５３が包材の送り方向に走行しながらシュート４に押し付けて、包材の重なり合った左右両側縁部を挟み付けることにより、該両側縁部同士を連続的に溶着するようになっている。
【００３６】
また、上記支持ユニット６０は、左右方向に延びるアーム部材６１と、回動フレーム４１の内側面に取り付けられたレール部材６２と、上記アーム部材６１に連結されると共に上記レール部材６２と係合して前後方向に摺動可能とされたスライド部材６３とを有し、該スライド部材６３の摺動により、上記アーム部材６１及び該アーム部材６１に支持された上記ヒータユニット５０が、ヒータベルト５３が包材の重なり部分に接触して溶着する溶着位置（図８参照）と該溶着位置における接触を解除する退避位置（図２参照）との間で移動するようになっている。なお、上記スライド部材６３の摺動は、レール部材６２の両端に設けられたストッパ６３ａにより規制されるようになっている。
【００３７】
次に、移動機構７０は、図２，図４，図５に示すように、上記回動フレーム４１の内部に設けられており、先端が上記スライド部材６３に固着されたロッド７１ａを有するシリンダ７１と、該シリンダ７１を固定するシリンダ取付板７２と、回動フレーム４１の内面に取り付けられたモータ７３と、該モータ７３の駆動軸（図示せず）に取り付けられたネジ軸７４とを有する。また、上記シリンダ７１内はピストン部材７１ｂにより仕切られて、第１エア供給室７１ｃ及び第２エア供給室７１ｄが設けられていると共に、上記第１エア供給室７１ｃ及び第２エア供給室７１ｄにそれぞれエアを供給するためのエア通路Ａ及び通路Ｂが設けられており、当該包装機１に備えられたエア供給源１００（図７参照）により、通路Ａを介して第１エア供給室７１ｃにエアが供給されると、上記ロッド７１ａが突出してヒータユニット５０及び支持ユニット６０が上記退避位置に移動し、通路Ｂを介して第２エア供給室７１ｄにエアが供給されると、上記ロッド７１ａが後退してヒータユニット５０及び支持ユニット６０が上記溶着位置に移動するようになっている。また、後で説明するが、該溶着位置でヒータベルト５３が重なり部分に接触すると、該ヒータベルト５３の押付力が上記シリンダ７１によって調整されるようになっている。
【００３８】
そして、上記シリンダ取付板７２は、その上部において上記ネジ軸７４に螺合していると共に、回動フレーム４１の下面に、モータ７３の作動によるシリンダ取付板７２の回転を規制する規制部材７５，７５が設けられており、これにより、モータ７３が作動すると、上記シリンダ取付板７２は直立姿勢のままでネジ軸７４の長手方向に移動するようになっている。そして、上記ヒータユニット５０及び支持ユニット６０が、該ユニット５０，６０を重なり部分に接触させたりその接触の解除を行ったりする作業位置と上記ユニット５０，６０がシュート４から大きく離反する非作業位置との間で移動されるようになっており、上記ヒータユニット５０及び支持ユニット６０の初期位置をシュート４のサイズや取付位置等に応じて自動的に設定したり、シュート４を交換するときには上記ユニット５０，６０を非作業位置に移動させてその交換作業のためのスペースを確保するようになっている。なお、上記シリンダ取付板７２のネジ軸７４と螺合する部分は、該取付板７２がネジ軸７４に沿って移動しやすいように厚肉部７２ａとされている。
【００３９】
一方、回動フレーム４１には、図６に鎖線で示すセット位置から実線で示すように外側方向（矢印Ｘ）には回動が許容され、セット位置から内側方向（矢印Ｙ）には回動が規制されるように、本体フレーム６に規制部６ａ，６ａが設けられている（図４，図６参照）。
【００４０】
次に、当該縦シール装置４０における上記エアシリンダ７１にエアを供給するエア供給システムについて説明する。
【００４１】
まず、図７に示すように、上記シリンダ７１には、該シリンダ７１にそれぞれ所定圧のエアを供給する第１レギュレータ１０１及び第２レギュレータ１０２が連結されている。一方、当該包装機１には、上述したように、包装袋に封入するエア等を生成するエア供給源１００を有し、上記第１、第２レギュレータ１０１，１０２は、それぞれそのエア供給源１００からエアを供給して、第１レギュレータ１０１は高圧のエアに、第２レギュレータ１０２は低圧のエアにそれぞれ調圧する。
【００４２】
また、上述したように、シリンダ７１内の第１エア供給室７１ｃ及び第２エア供給室７１ｄにそれぞれ上記高圧のエアを供給するための通路Ａ及び通路Ｂが設けられていると共に、上記第２エア供給室７１ｄに上記低圧のエアを供給するための通路Ｃが設けられており、第１の切換弁１０３及び第２の切換弁１０４の作動により、上記通路Ａ〜Ｃのうちから開通すべき通路が選択されるようになっている。つまり、第１の切換弁１０３により通路Ａが開通、通路Ｂが閉鎖され、第２の切換弁１０４により通路Ｃが閉鎖されたときには、第１エア供給室７１ｃに高圧のエアが供給されて、ヒータユニット５０及び支持ユニット６０が退避位置に移動し、第１の切換弁１０３により通路Ａが閉鎖、通路Ｂが開通され、第２の切換弁１０４により通路Ｃが閉鎖されたときには、第２エア供給室７１ｄに高圧のエアが供給されて、ヒータユニット５０及び支持ユニット６０が溶着位置に移動し、第１の切換弁１０３により通路Ａ及びＢが閉鎖され、第２の切換弁１０４により通路Ｃが開通されたときには、第２エア供給室７１ｄに低圧のエアが供給されて、溶着位置におけるヒータベルト５３の押付力が調整されるようになっている。
【００４３】
そして、上記第１、第２の切換弁１０３，１０４、上記第１、第２レギュレータ１０１，１０２及びモータ７３は、コントローラ１０５により作動が制御されるようになっている。
【００４４】
そして、当該包装機１の作動前は、シリンダ７１のロッド７１ａが大きく突出した状態で上記ヒータユニット５０及び支持ユニット６０が非作業位置に位置しており、当該包装機１が作動すると、上記コントローラ１０５は、モータ７３を作動させて上記ユニット５０，６０を作業位置に移動させると共に、第１レギュレータ１０１及び第１の切換弁１０３を作動させて、上記ユニット５０，６０を溶着位置まで移動させる。また、第２レギュレータ１０２及び第２の切換弁１０４を作動させて、その溶着位置においてヒータベルト５３を包材の重なり部分に接触させ、ヒータベルト５３による押付力が設定した値に一定に保たれるようにエアの圧力を調整させる。
【００４５】
そして、例えば、ヒータベルト５３による溶着中に包材の破断等のトラブルが生じた場合には、上記シリンダ７１を作動させてヒータユニット５０及び支持ユニット６０を退避位置に移動させると共に、例えば、シュート４及びフォーマ３を交換するときには、上記ユニット５０，６０を退避位置に移動させるだけではその交換に必要なスペースが十分確保されないので、上記モータ７３によりシュート４から大きく離反する非作業位置に移動させるようになっている。
【００４６】
さらに、本実施の形態においては、第１レギュレータ１０１により調圧された高圧のエアを通路Ｃに供給し得る通路Ｄが設けられていると共に、通路Ｃと通路Ｄとが上記第２の切換弁１０４を介して連結されている。そして、上記コントローラ１０５は、第１の切換弁１０３により通路Ａ，Ｂが閉鎖され、第２の切換弁１０４により通路Ｃが開通されたとき、つまり、第２エア供給室７１ｄに低圧のエアが供給されるときに、第２の切換弁１０４が所定の時間だけ通路Ｃと通路Ｄを連通させて、通路Ｃに高圧のエアを供給するようになっている。これにより、低圧のエアの供給時におけるシリンダ７１の壁面とピストン部材７１ｂとの間に働く静摩擦の作用によってピストン部材７１ｂの移動が遅れるのを防止して、ピストン部材７１ｂ、ひいてはヒータユニット５０及び支持ユニット６０の移動速度が低下することなく速やかに移動するようになっている。
【００４７】
以上のように、上記ヒータベルト５３による溶着が、シリンダ７１及び２つのレギュレータ１０１，１０２によって行われるように構成したので、従来使用していたバネに比べて、押付中のシュート４の変形や長年の使用によるシュート４の変形等により溶着位置が変化し、それに応じてバネの押付力を手動で調整するという必要がなく、上記ヒータベルト５３の押付力を、シュート４の変形やシュート４の取付位置の変化等による溶着位置の変化等に対応して、常に一定の押付力で押し付けることができるようになると共に、ヒータベルト５３の溶着位置と退避位置との間の移動や押付力の制御、あるいはヒータベルト５３の作業位置と非作業位置との間の移動を単一のエア供給システムで行うことができる。
【００４８】
なお、複数のエアの圧力を上記コントローラ１０５に予約登録して自動的に制御したり、遠隔操作で行ったりすることも可能となる。
【００４９】
【発明の効果】
まず、第１発明の製袋包装機によれば、重なり部分にヒータ部材が接触する溶着位置と接触しない退避位置との間における該ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整とを行うエアシリンダが備えられ、該エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧または押付力調整用の低圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する空気圧生成手段と、該生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記両位置間で移動させるときに上記エアシリンダに供給され、上記生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記エアシリンダに供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とを設けたので、該切換手段によりヒータ部材移動用空気圧がエアシリンダに供給されるように切り換えられることによって、ヒータ部材を溶着位置と退避位置との間で移動させることができると共に、上記切換手段により押付力調整用空気圧がエアシリンダに供給されるように切り換えられることによって、上記溶着位置におけるヒータ部材の押付力を調整することができる。その結果、エアシリンダによって、包材の厚みや材質等に関する特性等に応じてヒータ部材の押付力を正確に設定することができると共に、ヒータ部材の押付によるシュート部材の変形やシュート部材の長年の使用による変形等が起こってヒータ部材の溶着位置が変化しても、その変化に対応して常に設定された押付力でヒータ部材を押し付けることが可能となり、かつ、上記エアシリンダによって、上記溶着位置にあるヒータ部材の押圧力の微妙な制御が行え、したがって、ヒータ部材を溶着位置と退避位置との間で移動させる制御と、ヒータ部材の押圧力制御とをそれぞれ効率よく両立させて行うことができる。
【００５０】
また、第２発明の製袋包装機によれば、切換手段により、押付力調整用空気圧がエアシリンダに供給されるように切り換えられたときに、所定の時間だけヒータ部材移動用空気圧を押付力調整用空気圧に付加する制御手段を設けたので、ヒータ部材移動用空気圧の供給から押付力調整用空気圧の供給に切り換えられたときに、該押付力調整用空気圧に所定の時間だけ高圧のヒータ部材移動用空気圧が付加されることになり、その切換時に起こるエアシリンダの作動速度の低下を抑制することができる。
【００５１】
次に、第３発明の製袋包装機によれば、重なり部分にヒータ部材が接触する溶着位置と接触しない退避位置との間における該ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整とを行うエアシリンダが備えられ、該エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する第１の空気圧生成手段と、押付力調整用の低圧の空気圧を上記供給源から供給される空気圧を元圧として生成する第２の空気圧生成手段と、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記両位置間で移動させるときに上記エアシリンダに供給され、上記第２の空気圧生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記エアシリンダに供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とを設けたので、上記第１発明と同様に、該切換手段によりヒータ部材移動用空気圧がエアシリンダに供給されるように切り換えられることによって、ヒータ部材を溶着位置と退避位置との間で移動させることができると共に、上記切換手段により押付力調整用空気圧がエアシリンダに供給されるように切り換えられることによって、上記溶着位置におけるヒータ部材の押付力を調整することができる。その結果、エアシリンダによって、包材の厚みや材質等に関する特性等に応じてヒータ部材の押付力を正確に設定することができると共に、ヒータ部材の押付によるシュート部材の変形やシュート部材の長年の使用による変形等が起こってヒータ部材の溶着位置が変化しても、その変化に対応して常に設定された押付力でヒータ部材を押し付けることが可能となり、かつ、上記エアシリンダによって、上記溶着位置にあるヒータ部材の押圧力の微妙な制御が行え、したがって、ヒータ部材を溶着位置と退避位置との間で移動させる制御と、ヒータ部材の押圧力制御とをそれぞれ効率よく両立させて行うことができる。
【００５２】
また、第４発明の製袋包装機によれば、切換手段により、押付力調整用空気圧がエアシリンダに供給されるように切り換えられたときに、所定の時間だけ第１の空気圧生成手段がヒータ部材移動用空気圧を押付力調整用空気圧に付加するように制御する制御手段を設けたので、上記第２発明と同様に、ヒータ部材移動用空気圧の供給から押付力調整用空気圧の供給に切り換えられたときに、該押付力調整用空気圧に所定の時間だけ高圧のヒータ部材移動用空気圧が付加されることになり、その切換時に起こるエアシリンダの作動速度の低下を抑制することができる。
【００５３】
そして、第５発明の製袋包装機によれば、重なり部分にヒータ部材が接触する溶着位置への該ヒータ部材の移動、及び、接触しない退避位置への上記ヒータ部材の移動と、上記溶着位置における該ヒータ部材の押付力の調整を行うエアシリンダが備えられていると共に、該エアシリンダには、ヒータ部材を上記退避位置に移動させるときに空気圧が供給される第１のエア室と、ヒータ部材を上記溶着位置に移動させるとき、もしくはヒータ部材の押付力を調整するときに空気圧が供給される第２のエア室とが設けられており、上記エアシリンダに供給する空気圧として、ヒータ部材移動用の高圧の空気圧を単一の供給源から供給される空気圧を元圧として生成する第１の空気圧生成手段と、押付力調整用の低圧の空気圧を上記供給源から供給される空気圧を元圧として生成する第２の空気圧生成手段と、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧がヒータ部材を上記退避位置に移動させるときに上記第１のエア室に供給され、上記第１の空気圧生成手段で生成されたヒータ部材移動用空気圧が、ヒータ部材を上記溶着位置に移動させるときに上記第２のエア室に供給され、上記第２の空気圧生成手段で生成された押付力調整用空気圧が、ヒータ部材の押付力を調整するときに上記第２のエア室に供給されるようにこれらの空気圧のエアシリンダへの供給を切り換える切換手段とを設けたので、該切換手段によりヒータ部材移動用空気圧が第１のエア室に供給されるように切り換えられることによって、ヒータ部材を退避位置に移動させることができ、ヒータ部材移動用空気圧が第２のエア室に供給されるように切り換えられることによって、ヒータ部材を溶着位置に移動させることができ、押付力調整用空気圧が第２のエア室に供給されるように切り換えられることによって、溶着位置におけるヒータ部材の押付力を調整することができる。その結果、エアシリンダによって、包材の厚みや材質等に関する特性等に応じてヒータ部材の押付力を正確に設定することができると共に、ヒータ部材の押付によるシュート部材の変形やシュート部材の長年の使用による変形等が起こってヒータ部材の溶着位置が変化しても、その変化に対応して常に設定された押付力でヒータ部材を押し付けることが可能となり、かつ、上記エアシリンダによって、上記溶着位置にあるヒータ部材の押圧力の微妙な制御が行え、したがって、ヒータ部材を溶着位置と退避位置との間で移動させる制御と、ヒータ部材の押圧力制御とをそれぞれ効率よく両立させて行うことができる。
【００５４】
また、第６発明の製袋包装機によれば、切換手段により、押付力調整用空気圧が第２のエア室に供給されるように切り換えられたときに、所定の時間だけ第１の空気圧生成手段が第２のエア室にヒータ部材移動用空気圧を押付力調整用空気圧に付加するように制御する制御手段を設けたので、ヒータ部材移動用空気圧の第２のエア室への供給から押付力調整用空気圧の供給に切り換えられたときに、該押付力調整用空気圧に所定の時間だけ高圧のヒータ部材移動用空気圧が付加されることになり、その切換時に起こるエアシリンダの作動速度の低下を抑制することができる。
【００５５】
次に、第７発明の製袋包装機によれば、切換手段により、押付力調整用空気圧を供給するように切り換えられているときの該押付力調整用空気圧を可変制御する調整手段を設けたので、包材の厚み等に応じてヒータ部材による溶着時間等を調整することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る製袋包装機の概略正面図である。
【図２】同じく製袋包装機の要部平面図である。
【図３】加熱機構の拡大側面図である。
【図４】図２のア−ア線から見た矢視図である。
【図５】図２のイ−イ線から見た矢視図である。
【図６】回動フレームの回動状態を示す平面図である。
【図７】縦シール装置のシステム構成図である。
【図８】縦シール装置の溶着状態を示す平面図である。
【符号の説明】
１製袋包装機
３フォーマ
４シュート
２０横シール装置
４０縦シール装置
４１回動フレーム
５０ヒータユニット
５３ヒータベルト
６０支持ユニット
６１アーム部材
６２レール部材
６３スライド部材
７０移動機構
７１シリンダ
７３モータ
７４ネジ軸
１０１第１レギュレータ
１０２第２レギュレータ
１０３第１の切換弁
１０４第２の切換弁
１０５コントローラ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag making and packaging machine that encloses an article in a packaging bag while forming a belt-like film into the packaging bag, and belongs to the field of packaging technology.
[0002]
[Prior art]
In general, a bag making and packaging machine that encloses an article in a packaging bag while forming the packaging bag is formed by bending a belt-like packaging material into a cylindrical shape around an article input chute, and both left and right edges of the packaging material. The overlapping portion is thermally welded by a vertical sealing device, and the cylindrical packaging material is thermally welded in the width direction by a horizontal sealing device to enclose the article in the packaging material.
[0003]
Among them, the thermal welding by the vertical sealing device is, for example, intermittently bringing the heated heater block into contact with and away from the chute, and sandwiching the left and right side edges of the packaging material between the block and the front surface of the chute. Attached and pressed (intermittent conveyance), or wrapped around a pair of pulleys and heated, and a heated metal heater belt is continuously brought into contact with the chute, and both left and right edges of the packaging material Is sandwiched between the block and the front surface of the chute and pressed (continuously conveyed).
[0004]
In that case, the heater block in the intermittent conveyance system or the heater belt in the continuous conveyance system (hereinafter simply referred to as “heater”) is in contact with the chute to cover the packaging material. The welding position is moved between a welding position where the welding is performed and a retreat position where the heater is separated from the chute. That is, in the case of the intermittent conveyance method, the heater moves to the retracted position while the packaging material is conveyed. On the other hand, in the case of the continuous conveyance method, for example, an operation trouble occurs and the conveyance of the packaging material is temporarily performed. When the operation is stopped, the heater moves to the retracted position in order to avoid overheating of the packaging material.
[0005]
On the other hand, when the heater is in the welding position, the heater presses the packaging material against the chute with a desired pressure to weld the packaging material. The pressing force was adjusted manually.
[0006]
[Problems to be solved by the invention]
By the way, for example, the chute may be slightly changed in its mounting position depending on how it is attached to the packaging machine body, or may be deformed due to the pressing of the heater or the use for many years. In this case, the welding position of the heater changes, and as a result, the pressing force of the heater changes, and the elastic force of the spring must be readjusted each time the welding position changes.
[0007]
Further, manual adjustment of the elastic force of the spring is inaccurate, and in recent years, the pressing force of the heater has been affected by characteristics relating to the thickness and material of the film, and film seals such as lap seals and fin seals. It is desired to be able to cope with the operation capacity and operating conditions of the method or the bag making and packaging machine, and it is necessary to set the pressing force in detail according to these factors.
[0008]
On the other hand, as described above, apart from such a delicate adjustment of the pressing force of the heater, it is necessary to move the heater between the welding position and the retracted position. Responsiveness is important, and it is desirable that the heater move between the two positions as quickly as possible. Therefore, a relatively large force is required as the driving force for the movement, and in this respect, a control different from the fine adjustment of the pressing force of the heater is required. The problem is how to apply these different control forces to a single heater.
[0009]
Therefore, the present invention provides a bag-making package that can efficiently and effectively balance the control of moving the heater between the welding position and the retracted position and the delicate control of the pressing force of the heater at the welding position. It is an object to provide a machine.
[0010]
[Means for Solving the Problems]
That is, the present invention is characterized in that it is configured as follows in order to solve the above problems.
[0011]
First, the invention according to claim 1 (hereinafter referred to as “first invention”) is configured such that overlapping portions of the left and right side edges of the packaging material bent around the chute member are opposed to the chute member. In a bag making and packaging machine for welding by pressing against a chute member with a heater member capable of contacting and separating, the movement of the heater member between a welding position where the heater member contacts the overlapping portion and a retracted position where the heater member does not contact, and the welding An air cylinder for adjusting the pressing force of the heater member at a position is provided, and a high pressure air pressure for moving the heater member or a low pressure air pressure for adjusting the pressing force is supplied as a single air pressure to be supplied to the air cylinder. The air pressure generating means for generating the air pressure supplied from the source as an original pressure, and the heater member moving air pressure generated by the generating means move the heater member between the two positions. The air pressure for adjusting the pressing force generated by the generating means is supplied to the air cylinder when the pressing force of the heater member is adjusted. And switching means for switching the supply of.
[0012]
The invention according to claim 2 (hereinafter referred to as “second invention”) is the first invention when the air pressure for pressing force adjustment is switched to be supplied to the air cylinder by the switching means. The control means is provided for adding the heater member moving air pressure to the pressing force adjusting air pressure for a predetermined time.
[0013]
Next, the invention according to claim 3 (hereinafter referred to as “third invention”) is configured such that the overlapping portions of the left and right side edges of the packaging material bent around the chute member are arranged with respect to the chute member. In a bag making and packaging machine for welding by pressing against a chute member with a heater member capable of contacting and separating, the movement of the heater member between a welding position where the heater member contacts the overlapping portion and a retracted position where the heater member does not contact, An air cylinder that adjusts the pressing force of the heater member at the welding position is provided, and the air pressure supplied to the air cylinder is based on the air pressure supplied from a single supply source. First air pressure generating means for generating as a pressure, second air pressure generating means for generating a low pressure air pressure for adjusting the pressing force as an original air pressure supplied from the supply source, and The heater member moving air pressure generated by the first air pressure generating means is supplied to the air cylinder when the heater member is moved between the two positions, and is used for adjusting the pressing force generated by the second air pressure generating means. Switching means for switching supply of the air pressure to the air cylinder is provided so that the air pressure is supplied to the air cylinder when the pressing force of the heater member is adjusted.
[0014]
According to a fourth aspect of the present invention (hereinafter referred to as “fourth aspect”), in the third aspect, when the switching means is switched so that the air pressure for adjusting the pressing force is supplied to the air cylinder. The first air pressure generating means is provided with control means for controlling the air pressure for moving the heater member to be added to the air pressure for adjusting the pressing force for a predetermined time.
[0015]
In the invention according to claim 5 (hereinafter referred to as “fifth invention”), the overlapping portions of the left and right side edges of the packaging material bent around the chute member are opposed to the chute member. In a bag making and packaging machine for welding by pressing against a chute member with a heater member capable of contacting and separating, the heater member moves to a welding position where the heater member contacts the overlapping portion, and the heater moves to a retracted position where the heater member does not contact An air cylinder is provided for moving the member and adjusting the pressing force of the heater member at the welding position, and air pressure is supplied to the air cylinder when the heater member is moved to the retracted position. A first air chamber and a second air chamber to which air pressure is supplied when the heater member is moved to the welding position or when the pressing force of the heater member is adjusted are provided. A first air pressure generating means for generating a high pressure air pressure for moving the heater member as an air pressure supplied from a single supply source as an air pressure supplied to the air cylinder; Second air pressure generating means for generating low-pressure air pressure using the air pressure supplied from the supply source as a source pressure, and heater member moving air pressure generated by the first air pressure generating means bring the heater member to the retracted position. The heater member moving air pressure supplied to the first air chamber when moved and generated by the first air pressure generating means moves to the second air chamber when moving the heater member to the welding position. The air pressure for adjusting the pressing force generated by the second air pressure generating means is supplied to the second air chamber when adjusting the pressing force of the heater member. Characterized in that the switching means for switching the supply to the cylinders is provided.
[0016]
The invention according to claim 6 (hereinafter referred to as “sixth invention”) is switched by the switching means so that the air pressure for adjusting the pressing force is supplied to the second air chamber in the fifth invention. And a control means for controlling the first air pressure generating means to add the air pressure for moving the heater member to the air pressure for adjusting the pressing force in the second air chamber for a predetermined time. To do.
[0017]
Next, the invention according to claim 7 (hereinafter referred to as “seventh invention”) is switched to supply the pressing force adjusting air pressure by the switching means in any of the first to sixth inventions. And adjusting means for variably controlling the air pressure for adjusting the pressing force when being applied.
[0018]
The following effects are obtained by the first to seventh inventions.
[0019]
First, according to the bag making and packaging machine of the first invention, the heater member moves between the welding position where the heater member contacts the overlapping portion and the retracted position where the heater member does not contact, and the pressing force of the heater member at the welding position. An air cylinder for adjusting the air pressure is provided, and as the air pressure supplied to the air cylinder, a high pressure air pressure for moving the heater member or a low pressure air pressure for adjusting the pressing force is based on the air pressure supplied from a single supply source. The air pressure generating means generated as pressure and the heater member moving air pressure generated by the generating means are supplied to the air cylinder when the heater member is moved between the two positions, and the pressing generated by the generating means Switching to switch the supply of air pressure to the air cylinder so that the air pressure for force adjustment is supplied to the air cylinder when adjusting the pressing force of the heater member Since the step is provided so that the air pressure for moving the heater member is switched to be supplied to the air cylinder by the switching means, the heater member can be moved between the welding position and the retracted position. By switching so that the air pressure for adjusting the pressing force is supplied to the air cylinder by the switching means, the pressing force of the heater member at the welding position can be adjusted. As a result, the air cylinder can accurately set the pressing force of the heater member in accordance with the thickness and material properties of the packaging material, etc., and the deformation of the chute member due to the pressing of the heater member and the chute member for many years Even if the welding position of the heater member changes due to deformation or the like due to use, it becomes possible to press the heater member with a pressing force that is always set in response to the change, and the welding position is achieved by the air cylinder. Therefore, it is possible to perform both the control of moving the heater member between the welding position and the retracted position and the control of the pressing force of the heater member in an efficient manner. it can.
[0020]
According to the bag making and packaging machine of the second invention, when the air pressure for adjusting the pressing force is switched to be supplied to the air cylinder by the switching means, the air pressure for moving the heater member is applied to the pressing force for a predetermined time. Since the control means for adding to the adjustment air pressure is provided, when switching from the supply of the heater member moving air pressure to the supply of the pressing force adjusting air pressure, the pressing force adjusting air pressure is increased for a predetermined time. The moving air pressure is added, and a decrease in the operating speed of the air cylinder that occurs at the time of switching can be suppressed.
[0021]
Next, according to the bag making and packaging machine of the third invention, the heater member moves between the welding position where the heater member contacts the overlapping portion and the retracted position where the heater member does not contact, and the heater member is pressed at the welding position. And a first air pressure that generates a high pressure air pressure for moving the heater member as a base pressure supplied from a single supply source as an air pressure to be supplied to the air cylinder. Generating means, second air pressure generating means for generating a low pressure air pressure for adjusting the pressing force using the air pressure supplied from the supply source as a source pressure, and heater member movement generated by the first air pressure generating means Air pressure is supplied to the air cylinder when the heater member is moved between the two positions, and the pressing force adjusting air pressure generated by the second air pressure generating means is the pressing force of the heater member. Since there is provided switching means for switching supply of these air pressures to the air cylinder so as to be supplied to the air cylinder at the time of adjustment, similarly to the first invention, the air pressure for moving the heater member is caused by the switching means. By switching to be supplied to the air cylinder, the heater member can be moved between the welding position and the retracted position, and the air pressure for adjusting the pressing force is supplied to the air cylinder by the switching means. By switching, the pressing force of the heater member at the welding position can be adjusted. As a result, the air cylinder can accurately set the pressing force of the heater member in accordance with the thickness and material properties of the packaging material, etc., and the deformation of the chute member due to the pressing of the heater member and the chute member for many years Even if the welding position of the heater member changes due to deformation or the like due to use, it becomes possible to press the heater member with a pressing force that is always set in response to the change, and the welding position is achieved by the air cylinder. Therefore, it is possible to perform both the control of moving the heater member between the welding position and the retracted position and the control of the pressing force of the heater member in an efficient manner. it can.
[0022]
According to the bag making and packaging machine of the fourth aspect of the invention, when the switching means is switched so that the pressing force adjusting air pressure is supplied to the air cylinder, the first air pressure generating means is the heater for a predetermined time. Since the control means for controlling the member moving air pressure to be added to the pressing force adjusting air pressure is provided, the heater member moving air pressure can be switched to the pressing force adjusting air pressure in the same manner as in the second aspect of the invention. When this occurs, a high pressure for moving the heater member is added to the pressing force adjusting air pressure for a predetermined time, and a decrease in the operating speed of the air cylinder that occurs at the time of switching can be suppressed.
[0023]
According to the bag making and packaging machine of the fifth aspect of the invention, the heater member moves to the welding position where the heater member contacts the overlapping portion, the heater member moves to the retracted position where it does not contact, and the welding position. An air cylinder that adjusts the pressing force of the heater member in the first air chamber, a first air chamber to which air pressure is supplied when the heater member is moved to the retracted position, and a heater. There is provided a second air chamber to which air pressure is supplied when the member is moved to the welding position or when the pressing force of the heater member is adjusted, and the heater member moves as the air pressure supplied to the air cylinder. A first air pressure generating means for generating a high-pressure air pressure for use as a source pressure from a single supply source, and a low-pressure air pressure for adjusting the pressing force is supplied from the supply source. The second air pressure generating means for generating the generated air pressure as the original pressure, and the first air chamber when the heater member moving air pressure generated by the first air pressure generating means moves the heater member to the retracted position. The heater member moving air pressure generated by the first air pressure generating means is supplied to the second air chamber when the heater member is moved to the welding position, and the second air pressure generating means And a switching means for switching supply of the air pressure to the air cylinder so that the air pressure for adjusting the pressing force generated in step 1 is supplied to the second air chamber when the pressing force of the heater member is adjusted. Therefore, by switching so that the air pressure for moving the heater member is supplied to the first air chamber by the switching means, the heater member can be moved to the retracted position, and the heater portion By switching so that the air pressure for movement is supplied to the second air chamber, the heater member can be moved to the welding position, and the air pressure for adjusting the pressing force is switched to be supplied to the second air chamber. By doing so, the pressing force of the heater member at the welding position can be adjusted. As a result, the air cylinder can accurately set the pressing force of the heater member in accordance with the thickness and material properties of the packaging material, etc., and the deformation of the chute member due to the pressing of the heater member and the chute member for many years Even if the welding position of the heater member changes due to deformation or the like due to use, it becomes possible to press the heater member with a pressing force that is always set in response to the change, and the welding position is achieved by the air cylinder. Therefore, it is possible to perform both the control of moving the heater member between the welding position and the retracted position and the control of the pressing force of the heater member in an efficient manner. it can.
[0024]
According to the bag making and packaging machine of the sixth aspect of the invention, when the switching means is switched so that the pressing force adjusting air pressure is supplied to the second air chamber, the first air pressure is generated for a predetermined time. Since the control means for controlling the means to add the air pressure for moving the heater member to the air pressure for adjusting the pressing force is provided in the second air chamber, the pressing force from the supply of the air pressure for moving the heater member to the second air chamber When switching to the supply of adjustment air pressure, the high pressure air pressure for moving the heater member is added to the pressing force adjustment air pressure for a predetermined time, which reduces the operating speed of the air cylinder that occurs at the time of switching. Can be suppressed.
[0025]
Next, according to the bag making and packaging machine of the seventh aspect of the invention, there is provided adjusting means for variably controlling the pressing force adjusting air pressure when the switching means is switched to supply the pressing force adjusting air pressure. Therefore, the welding time etc. by a heater member can be adjusted according to the thickness etc. of a packaging material.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0027]
As shown in FIG. 1, the bag making and packaging machine 1 according to this embodiment is provided with a roll support portion that rotatably supports a film roll, not shown, above the rear portion of the machine base 2. In the upper part of the front of the machine base 2, the former 3 which is bent so that both side edges thereof are overlapped while guiding the belt-like film fed forward from the roll to the lower side is overlapped by the former 3. A vertical sealing device 40 that welds both side edges of the formed belt-like film to form a cylindrical packaging material, and an article that enters the cylindrical packaging material from above and puts the article into the cylindrical packaging material A charging chute 4 is provided.
[0028]
The former 3 and the chute 4 are supported by a support frame 5 attached on the machine base 2.
[0029]
Further, film feeding mechanisms 10 are provided on both the left and right sides in the substantially central portion of the chute 4 in the height direction. The feeding mechanism 10 is a cover member assembled to the machine base 2 although not shown in detail. A pair of upper and lower rollers 12, 12 supported by 11, and a belt member 13 that is wound around these rollers 12, 12 and sandwiches the left and right sides of the tubular packaging material with the left and right sides of the chute 4, respectively. By rotating the rollers 12 and 12 in a predetermined direction, a motor (not shown) that moves the cylindrical packaging material downward is configured.
[0030]
And the horizontal sealing apparatus 20 is arrange | positioned in the lower part in the machine base 2 in this packaging machine 1. As shown in FIG. The horizontal sealing device 20 includes a pair of bar members 21 and 21 (only one is shown) disposed on both front and rear sides of the cylindrical packaging material, and a support unit 22 that supports the bar members 21 and 21 so as to be in contact with and away from each other. The bar members 21 and 21 are heated by a heater (not shown).
[0031]
When the front bar member 21 and the rear bar member 21 come close to each other via the cylindrical packaging material, the cylindrical packaging material is sealed in the width direction at two upper and lower positions. A cutter (not shown) housed in the member 21 cuts the cylindrical packaging material in the width direction between the upper and lower sealing portions.
[0032]
As shown in FIG. 1, a mounting table 30 on which a product manufactured by the packaging machine 1 is mounted is provided below the machine base 2.
[0033]
Next, the vertical sealing device 40 will be described. First, as shown in FIG. 2, the vertical sealing device 40 is attached to a rotating frame 41 rotatably supported by the main body frame 6, and welds the left and right side edges of the overlapped packaging material. A heater unit 50 that supports the heater unit 50 and is slidably provided on the rotating frame 41, and the support unit 60 or the heater unit 50 is moved toward and away from the chute 4. It is comprised with the moving mechanism 70 to which it moves to.
[0034]
As shown in FIGS. 2 and 3, the heater unit 50 includes a pair of upper and lower pulleys 52, 52 provided on a mounting plate 51, a heater belt 53 wound around the pulleys 52, 52, and the pulley 52. , 52 and a heater block 54 that heats the heater belt 53 and a motor 55 that drives the pulleys 52, 52 to run the heater belt 53.
[0035]
Then, the heater unit 50 presses against the chute 4 while the heater belt 53 travels in the packaging material feed direction, and sandwiches the left and right side edges where the packaging materials overlap, thereby continuously connecting the both side edges. It comes to weld.
[0036]
The support unit 60 includes an arm member 61 extending in the left-right direction, a rail member 62 attached to the inner surface of the rotating frame 41, and is connected to the arm member 61 and engages with the rail member 62. The arm member 61 and the heater unit 50 supported by the arm member 61 by the sliding of the slide member 63 include the heater belt 53. It moves between a welding position (see FIG. 8) that contacts and welds the overlapping portion of the packaging material and a retracted position (see FIG. 2) that releases the contact at the welding position. The sliding of the slide member 63 is regulated by stoppers 63a provided at both ends of the rail member 62.
[0037]
Next, as shown in FIGS. 2, 4, and 5, the moving mechanism 70 is provided inside the rotating frame 41, and a cylinder 71 having a rod 71 a having a tip fixed to the slide member 63. And a cylinder mounting plate 72 for fixing the cylinder 71, a motor 73 attached to the inner surface of the rotating frame 41, and a screw shaft 74 attached to a drive shaft (not shown) of the motor 73. The cylinder 71 is partitioned by a piston member 71b to provide a first air supply chamber 71c and a second air supply chamber 71d. The first air supply chamber 71c and the second air supply chamber 71d are separated from each other. An air passage A and a passage B for supplying air are provided, respectively, and the air supply source 100 (see FIG. 7) provided in the packaging machine 1 causes the first air supply chamber 71c to pass through the passage A. When air is supplied, the rod 71a protrudes, the heater unit 50 and the support unit 60 move to the retracted position, and when air is supplied to the second air supply chamber 71d via the passage B, the rod 71a. The heater unit 50 and the support unit 60 are moved to the welding position. As will be described later, when the heater belt 53 comes into contact with the overlapping portion at the welding position, the pressing force of the heater belt 53 is adjusted by the cylinder 71.
[0038]
The cylinder mounting plate 72 is screwed onto the screw shaft 74 at an upper portion thereof, and a regulating member 75 for regulating the rotation of the cylinder mounting plate 72 by the operation of the motor 73 on the lower surface of the rotating frame 41. 75 is provided, so that when the motor 73 is operated, the cylinder mounting plate 72 moves in the longitudinal direction of the screw shaft 74 in an upright position. The heater unit 50 and the support unit 60 are in a working position where the units 50 and 60 are brought into contact with the overlapping portion and the contact is released, and a non-working position in which the units 50 and 60 are largely separated from the chute 4. When the initial positions of the heater unit 50 and the support unit 60 are automatically set according to the size and mounting position of the chute 4 or when the chute 4 is replaced, The units 50 and 60 are moved to the non-working position to secure a space for the replacement work. The portion of the cylinder mounting plate 72 that engages with the screw shaft 74 is a thick portion 72 a so that the mounting plate 72 can easily move along the screw shaft 74.
[0039]
On the other hand, the rotation frame 41 is allowed to rotate in the outer direction (arrow X) as shown by the solid line from the set position indicated by the chain line in FIG. 6, and is rotated in the inner direction (arrow Y) from the set position. The body frame 6 is provided with restricting portions 6a and 6a (see FIGS. 4 and 6).
[0040]
Next, an air supply system for supplying air to the air cylinder 71 in the vertical sealing device 40 will be described.
[0041]
First, as shown in FIG. 7, a first regulator 101 and a second regulator 102 that supply air of a predetermined pressure to the cylinder 71 are connected to the cylinder 71. On the other hand, as described above, the packaging machine 1 has an air supply source 100 that generates air or the like sealed in the packaging bag, and the first and second regulators 101 and 102 each have the air supply source 100. The first regulator 101 adjusts the pressure to high pressure air, and the second regulator 102 adjusts the pressure to low pressure air.
[0042]
In addition, as described above, the passage A and the passage B for supplying the high-pressure air to the first air supply chamber 71c and the second air supply chamber 71d in the cylinder 71 are provided, respectively, and the second A passage C for supplying the low-pressure air to the air supply chamber 71d is provided, and should be opened from the passages A to C by the operation of the first switching valve 103 and the second switching valve 104. A passage is selected. That is, when the passage A is opened by the first switching valve 103, the passage B is closed, and the passage C is closed by the second switching valve 104, high-pressure air is supplied to the first air supply chamber 71c, When the heater unit 50 and the support unit 60 are moved to the retracted position, the passage A is closed by the first switching valve 103, the passage B is opened, and the passage C is closed by the second switching valve 104, the second air High-pressure air is supplied to the supply chamber 71d, the heater unit 50 and the support unit 60 move to the welding position, the passages A and B are closed by the first switching valve 103, and the passage C is closed by the second switching valve 104. Is opened, low pressure air is supplied to the second air supply chamber 71d, and the pressing force of the heater belt 53 at the welding position is adjusted.
[0043]
The operations of the first and second switching valves 103 and 104, the first and second regulators 101 and 102, and the motor 73 are controlled by a controller 105.
[0044]
And before the operation of the packaging machine 1, the heater unit 50 and the support unit 60 are positioned in the non-working position with the rod 71a of the cylinder 71 protruding greatly, and when the packaging machine 1 is operated, the controller 105 operates the motor 73 to move the units 50 and 60 to the working position, and operates the first regulator 101 and the first switching valve 103 to move the units 50 and 60 to the welding position. Further, the second regulator 102 and the second switching valve 104 are operated to bring the heater belt 53 into contact with the overlapping portion of the packaging material at the welding position, and the pressing force by the heater belt 53 is kept constant at a set value. Adjust the air pressure so that
[0045]
For example, when troubles such as breakage of the packaging material occur during welding by the heater belt 53, the cylinder 71 is operated to move the heater unit 50 and the support unit 60 to the retracted position. 4 and the former 3 are replaced, the space required for the replacement cannot be secured by simply moving the units 50 and 60 to the retracted position. Therefore, the motor 73 is moved to a non-working position that is far away from the chute 4. It is like that.
[0046]
Further, in the present embodiment, a passage D that can supply high-pressure air regulated by the first regulator 101 to the passage C is provided, and the passage C and the passage D serve as the second switching valve. They are connected via 104. When the passages A and B are closed by the first switching valve 103 and the passage C is opened by the second switching valve 104, that is, the controller 105 causes low pressure air to flow into the second air supply chamber 71d. When supplied, the second switching valve 104 connects the passage C and the passage D for a predetermined time so as to supply high-pressure air to the passage C. This prevents the movement of the piston member 71b from being delayed by the action of static friction acting between the wall surface of the cylinder 71 and the piston member 71b when the low-pressure air is supplied, thereby preventing the piston member 71b and the heater unit 50 and the support. The moving speed of the unit 60 moves quickly without decreasing.
[0047]
As described above, since the welding by the heater belt 53 is configured to be performed by the cylinder 71 and the two regulators 101 and 102, the deformation of the chute 4 during pressing and a long time compared to the conventionally used springs. It is not necessary to manually adjust the pressing force of the spring in accordance with the deformation of the chute 4 due to the deformation of the chute 4, and the pressing force of the heater belt 53 is used to deform the chute 4 or attach the chute 4 accordingly. Corresponding to a change in the welding position due to a change in position, etc., it becomes possible to always press with a constant pressing force, and the movement of the heater belt 53 between the welding position and the retracted position and the control of the pressing force, Alternatively, the movement of the heater belt 53 between the working position and the non-working position can be performed by a single air supply system.
[0048]
It should be noted that a plurality of air pressures can be reserved and registered in the controller 105 and automatically controlled or remotely operated.
[0049]
【The invention's effect】
First, according to the bag making and packaging machine of the first invention, the heater member moves between the welding position where the heater member contacts the overlapping portion and the retracted position where the heater member does not contact, and the pressing force of the heater member at the welding position. An air cylinder for adjusting the air pressure is provided, and as the air pressure supplied to the air cylinder, a high pressure air pressure for moving the heater member or a low pressure air pressure for adjusting the pressing force is based on the air pressure supplied from a single supply source. The air pressure generating means generated as pressure and the heater member moving air pressure generated by the generating means are supplied to the air cylinder when the heater member is moved between the two positions, and the pressing generated by the generating means Switching to switch the supply of air pressure to the air cylinder so that the air pressure for force adjustment is supplied to the air cylinder when adjusting the pressing force of the heater member Since the step is provided so that the air pressure for moving the heater member is switched to be supplied to the air cylinder by the switching means, the heater member can be moved between the welding position and the retracted position. By switching so that the air pressure for adjusting the pressing force is supplied to the air cylinder by the switching means, the pressing force of the heater member at the welding position can be adjusted. As a result, the air cylinder can accurately set the pressing force of the heater member in accordance with the thickness and material properties of the packaging material, etc., and the deformation of the chute member due to the pressing of the heater member and the chute member for many years Even if the welding position of the heater member changes due to deformation or the like due to use, it becomes possible to press the heater member with a pressing force that is always set in response to the change, and the welding position is achieved by the air cylinder. Therefore, it is possible to perform both the control of moving the heater member between the welding position and the retracted position and the control of the pressing force of the heater member in an efficient manner. it can.
[0050]
According to the bag making and packaging machine of the second invention, when the air pressure for adjusting the pressing force is switched to be supplied to the air cylinder by the switching means, the air pressure for moving the heater member is applied to the pressing force for a predetermined time. Since the control means for adding to the adjustment air pressure is provided, when switching from the supply of the heater member moving air pressure to the supply of the pressing force adjusting air pressure, the pressing force adjusting air pressure is increased for a predetermined time. The moving air pressure is added, and a decrease in the operating speed of the air cylinder that occurs at the time of switching can be suppressed.
[0051]
Next, according to the bag making and packaging machine of the third invention, the heater member moves between the welding position where the heater member contacts the overlapping portion and the retracted position where the heater member does not contact, and the heater member is pressed at the welding position. And a first air pressure that generates a high pressure air pressure for moving the heater member as a base pressure supplied from a single supply source as an air pressure to be supplied to the air cylinder. Generating means, second air pressure generating means for generating a low pressure air pressure for adjusting the pressing force using the air pressure supplied from the supply source as a source pressure, and heater member movement generated by the first air pressure generating means Air pressure is supplied to the air cylinder when the heater member is moved between the two positions, and the pressing force adjusting air pressure generated by the second air pressure generating means is the pressing force of the heater member. Since there is provided switching means for switching supply of these air pressures to the air cylinder so as to be supplied to the air cylinder at the time of adjustment, similarly to the first invention, the air pressure for moving the heater member is caused by the switching means. By switching to be supplied to the air cylinder, the heater member can be moved between the welding position and the retracted position, and the air pressure for adjusting the pressing force is supplied to the air cylinder by the switching means. By switching, the pressing force of the heater member at the welding position can be adjusted. As a result, the air cylinder can accurately set the pressing force of the heater member in accordance with the thickness and material properties of the packaging material, etc., and the deformation of the chute member due to the pressing of the heater member and the chute member for many years Even if the welding position of the heater member changes due to deformation or the like due to use, it becomes possible to press the heater member with a pressing force that is always set in response to the change, and the welding position is achieved by the air cylinder. Therefore, it is possible to perform both the control of moving the heater member between the welding position and the retracted position and the control of the pressing force of the heater member in an efficient manner. it can.
[0052]
According to the bag making and packaging machine of the fourth aspect of the invention, when the switching means is switched so that the pressing force adjusting air pressure is supplied to the air cylinder, the first air pressure generating means is the heater for a predetermined time. Since the control means for controlling the member moving air pressure to be added to the pressing force adjusting air pressure is provided, the heater member moving air pressure can be switched to the pressing force adjusting air pressure in the same manner as in the second aspect of the invention. When this occurs, a high pressure for moving the heater member is added to the pressing force adjusting air pressure for a predetermined time, and a decrease in the operating speed of the air cylinder that occurs at the time of switching can be suppressed.
[0053]
According to the bag making and packaging machine of the fifth aspect of the invention, the heater member moves to the welding position where the heater member contacts the overlapping portion, the heater member moves to the retracted position where it does not contact, and the welding position. An air cylinder that adjusts the pressing force of the heater member in the first air chamber, a first air chamber to which air pressure is supplied when the heater member is moved to the retracted position, and a heater. There is provided a second air chamber to which air pressure is supplied when the member is moved to the welding position or when the pressing force of the heater member is adjusted, and the heater member moves as the air pressure supplied to the air cylinder. A first air pressure generating means for generating a high-pressure air pressure for use as a source pressure from a single supply source, and a low-pressure air pressure for adjusting the pressing force is supplied from the supply source. The second air pressure generating means for generating the generated air pressure as the original pressure, and the first air chamber when the heater member moving air pressure generated by the first air pressure generating means moves the heater member to the retracted position. The heater member moving air pressure generated by the first air pressure generating means is supplied to the second air chamber when the heater member is moved to the welding position, and the second air pressure generating means And a switching means for switching supply of the air pressure to the air cylinder so that the air pressure for adjusting the pressing force generated in step 1 is supplied to the second air chamber when the pressing force of the heater member is adjusted. Therefore, by switching so that the air pressure for moving the heater member is supplied to the first air chamber by the switching means, the heater member can be moved to the retracted position, and the heater portion By switching so that the air pressure for movement is supplied to the second air chamber, the heater member can be moved to the welding position, and the air pressure for adjusting the pressing force is switched to be supplied to the second air chamber. By doing so, the pressing force of the heater member at the welding position can be adjusted. As a result, the air cylinder can accurately set the pressing force of the heater member in accordance with the thickness and material properties of the packaging material, etc., and the deformation of the chute member due to the pressing of the heater member and the chute member for many years Even if the welding position of the heater member changes due to deformation or the like due to use, it becomes possible to press the heater member with a pressing force that is always set in response to the change, and the welding position is achieved by the air cylinder. Therefore, it is possible to perform both the control of moving the heater member between the welding position and the retracted position and the control of the pressing force of the heater member in an efficient manner. it can.
[0054]
According to the bag making and packaging machine of the sixth aspect of the invention, when the switching means is switched so that the pressing force adjusting air pressure is supplied to the second air chamber, the first air pressure is generated for a predetermined time. Since the control means for controlling the means to add the air pressure for moving the heater member to the air pressure for adjusting the pressing force is provided in the second air chamber, the pressing force from the supply of the air pressure for moving the heater member to the second air chamber When switching to the supply of adjustment air pressure, the high pressure air pressure for moving the heater member is added to the pressing force adjustment air pressure for a predetermined time, which reduces the operating speed of the air cylinder that occurs at the time of switching. Can be suppressed.
[0055]
Next, according to the bag making and packaging machine of the seventh aspect of the invention, there is provided adjusting means for variably controlling the pressing force adjusting air pressure when the switching means is switched to supply the pressing force adjusting air pressure. Therefore, the welding time etc. by a heater member can be adjusted according to the thickness etc. of a packaging material.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a bag making and packaging machine according to an embodiment of the present invention.
FIG. 2 is a plan view of an essential part of the bag making and packaging machine.
FIG. 3 is an enlarged side view of a heating mechanism.
4 is a view as seen from an arrow line in FIG. 2. FIG.
5 is an arrow view seen from the line II in FIG. 2. FIG.
FIG. 6 is a plan view showing a rotating state of a rotating frame.
FIG. 7 is a system configuration diagram of a vertical seal device.
FIG. 8 is a plan view showing a welding state of the vertical seal device.
[Explanation of symbols]
1 Bag making and packaging machine
3 Forma
4 Shoot
20 Horizontal sealing device
40 Vertical seal device
41 Rotating frame
50 Heater unit
53 Heater belt
60 Support unit
61 Arm member
62 Rail member
63 Slide member
70 Movement mechanism
71 cylinders
73 motor
74 Screw shaft
101 First regulator
102 Second regulator
103 1st switching valve
104 Second switching valve
105 controller

Claims

A bag making and packaging machine for welding by pressing an overlapping portion of left and right side edges of a packaging material bent around a chute member against the chute member with a heater member capable of contacting and separating from the chute member. An air cylinder that performs movement of the heater member between a welding position at which the heater member contacts the overlapping portion and a retracted position at which the heater member does not contact, and adjustment of a pressing force of the heater member at the welding position, Air pressure generating means for generating high pressure air pressure for moving the heater member or low pressure air pressure for adjusting the pressing force from a single supply source as the original pressure as the air pressure supplied to the air cylinder, and the generating means The air pressure for moving the heater member generated in step (b) is supplied to the air cylinder when the heater member is moved between the two positions, and is generated by the generating means. Switching means for switching supply of these air pressures to the air cylinder is provided so that the air pressure for adjusting the pressing force is supplied to the air cylinder when adjusting the pressing force of the heater member. Bag making and packaging machine.

There is provided a control means for adding the air pressure for moving the heater member to the pressing force adjusting air pressure for a predetermined time when the switching means is switched so that the pressing force adjusting air pressure is supplied to the air cylinder. The bag making and packaging machine according to claim 1.

A bag making and packaging machine for welding by pressing an overlapping portion of left and right side edges of a packaging material bent around a chute member against the chute member with a heater member capable of contacting and separating from the chute member. An air cylinder that performs movement of the heater member between a welding position at which the heater member contacts the overlapping portion and a retracted position at which the heater member does not contact, and adjustment of a pressing force of the heater member at the welding position, As the air pressure supplied to the air cylinder, a first air pressure generating means for generating a high pressure air pressure for moving the heater member from the air pressure supplied from a single supply source, and a low pressure air pressure for adjusting the pressing force The second air pressure generating means for generating the air pressure supplied from the supply source as a source pressure, and the heater member moving air pressure generated by the first air pressure generating means are The air cylinder is supplied to the air cylinder when the data member is moved between the two positions, and the air cylinder for adjusting the pressing force generated by the second air pressure generating means adjusts the pressing force of the heater member. And a switching means for switching the supply of these air pressures to the air cylinder so as to be supplied to the bag.

When the switching means is switched so that the pressing force adjusting air pressure is supplied to the air cylinder, the first air pressure generating means adds the heater member moving air pressure to the pressing force adjusting air pressure for a predetermined time. 4. The bag making and packaging machine according to claim 3, further comprising control means for controlling the bag.

A bag making and packaging machine for welding by pressing an overlapping portion of left and right side edges of a packaging material bent around a chute member against the chute member with a heater member capable of contacting and separating from the chute member. The air for adjusting the pressing force of the heater member at the welding position and the movement of the heater member to the welding position where the heater member contacts the overlapping portion, the movement of the heater member to the non-contacting position The air cylinder is provided with a first air chamber to which air pressure is supplied when the heater member is moved to the retracted position, and when the heater member is moved to the welding position, or the heater And a second air chamber to which air pressure is supplied when adjusting the pressing force of the member. A first air pressure generating means for generating a high-pressure air pressure for use as an original pressure from an air pressure supplied from a single supply source; and a low-pressure air pressure for adjusting a pressing force from the supply source. Second air pressure generating means generated as above, and heater member moving air pressure generated by the first air pressure generating means is supplied to the first air chamber when the heater member is moved to the retracted position, The heater member moving air pressure generated by the first air pressure generating means is supplied to the second air chamber when the heater member is moved to the welding position, and the pressing generated by the second air pressure generating means. And switching means for switching supply of these air pressures to the air cylinder so that the force adjusting air pressure is supplied to the second air chamber when the pressing force of the heater member is adjusted. Bag-making and packaging machine according to symptoms.

When the switching means is switched so that the pressing force adjusting air pressure is supplied to the second air chamber, the first air pressure generating means applies the heater member moving air pressure to the second air chamber for a predetermined time. 6. The bag making and packaging machine according to claim 5, further comprising control means for controlling to add to the air pressure for adjusting the pressing force.

7. An adjusting means for variably controlling the pressing force adjusting air pressure when the pressing means is switched to supply the pressing force adjusting air pressure is provided by the switching means. The bag making and packaging machine according to any one of the above.