JP4527226B2

JP4527226B2 - Bag making and packaging machine

Info

Publication number: JP4527226B2
Application number: JP2000015421A
Authority: JP
Inventors: 雅夫福田
Original assignee: Ishida Co Ltd
Current assignee: Ishida Co Ltd
Priority date: 2000-01-25
Filing date: 2000-01-25
Publication date: 2010-08-18
Anticipated expiration: 2020-01-25
Also published as: JP2001206312A

Description

【０００１】
【発明の属する技術分野】
本発明は、帯状の包材を袋状に成形しながら該包材内に物品を投入して封止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、帯状の包材を包装袋形成用のフォーマに供給して左右の両側縁部を重ね合わせて筒状に成形するとともに、該フォーマを構成する物品導入用チューブ部構成部材の前面で縦シール装置により上記筒状包材の重ね合わせ部を長手方向に沿って熱溶着し、また横シール装置により該筒状包材を長手方向に直交する幅方向に熱溶着して袋状に成形し、その後、この袋状とされた包材に上記チューブ部構成部材を通して上方から被包装物を導入するとともに、その上部を上記横シール装置によって封止し、かつ包材の上流部から切り離すことにより、被包装物を包装袋に封入してなる製品を生成するようにしたものである。
【０００３】
その場合に、被包装物が食品である場合には、その腐敗や変質を防止するため、被包装物が導入された袋状包材内の空気を窒素ガスやアルゴンガス等の不活性ガスに置換した上で上部を封止することが行われ、そのための構造が例えば特開平１０−５３２１７号公報に開示されている。
【０００４】
この公報に開示されたガス置換装置は、物品導入用チューブ部構成部材の内面に上下方向に延びる置換ガス通路を設け、その上端の入口から不活性ガスを供給して下端の出口より流出させることにより該不活性ガスを袋状の包材内に送り込み、これにより該包材内の空気を排出して不活性ガスに置換するようになっている。
【０００５】
【発明が解決しようとする課題】
ところで、この種の置換ガス通路は、通常、図１３に示すように、断面形状が円形とされたチューブ部構成部材Ａの内側に、その上部から下部にわたって通路構成部材Ｂを張り付けて、該通路構成部材Ｂとチューブ部構成部材Ａとの間に上下に延びる空間Ｇを形成することにより構成される。その場合に、通路構成部材Ｂはチューブ部構成部材Ａの内側の所定箇所Ｗ…Ｗで、溶接によって固着されるのが通例である。
【０００６】
しかし、チューブ部構成部材Ａの内側への通路構成部材Ｂの溶接作業は難しく、特に図例のようにチューブ部構成部材Ａが完全な筒状の場合、一層難しくなるとともに、溶接箇所Ｗ…Ｗを滑らかに仕上げる作業も難しいことになる。この溶接箇所Ｗ…Ｗに凹凸や隙間が生じると、被包装物の円滑な落下、導入に支障を来たすことがある。すなわち、チューブ部構成部材Ａ内部に導入された被包装物がこの凹凸に引っかかり或いは隙間に入り込んで滞留し、被包装物がチューブ部構成部材Ａ内部を円滑に落下しないことがあるので、包装物の内容量に過不足が生じたり、或いは横シール部における被包装物の噛み込みが生じたりすることがある。
【０００７】
また、被包装物が食品である場合、被包装物のかすが上記凹凸に引っかかり或いは隙間に入り込んで滞留すると、雑菌が繁殖することがあるので、衛生上問題となることがある。
【０００８】
そこで、本発明は、ガス置換が行われる製袋包装機において、置換ガス通路の配設に際し、施工を容易にするとともに、チューブ部構成部材内面に凹凸や隙間を生じさせないようにすることを課題とする。
【０００９】
【課題を解決するための手段】
上記課題を解決するため、本発明は次のように構成したことを特徴とする。
【００１０】
まず、請求項１に記載の発明（以下、第１発明という）は、セーラ部と該セーラ部に連設されたチューブ部とを有して帯状の包材を筒状に成形するフォーマと、該フォーマによって筒状に成形された包材の左右両側縁部の重なり部分を長手方向に沿ってシールする縦シール手段と、該包材を長手方向に直交する方向にシールすることにより該包材を袋状に成形する横シール手段とを有し、被包装物を上記チューブ部の内側を通過させて袋状に成形された包材内に導入するとともに、該包材内の空気を不活性ガスに置換するようにした製袋包装機であって、上記チューブ部の外側面に、該チューブ部の外周面を構成するとともに上記不活性ガス供給用の置換ガス通路を形成する別部材の通路構成部材が該チューブ部の長手方向に沿って取り付けられており、かつ、該通路構成部材に、縦シール手段による押付け力を受ける受け部が設けられていることを特徴とする。
【００１１】
次に、請求項２に記載の発明（以下、第２発明という）は、上記第１発明において、置換ガス通路を、チューブ部構成部材をその長手方向に沿って内方に向けて陥入させるように設けた凹部と、該凹部を閉鎖する通路構成部材とで構成したことを特徴とする。
【００１２】
また、請求項３に記載の発明（以下、第３発明という）は、上記第１発明において、置換ガス通路を、チューブ部の長手方向に沿って外方へ膨出した通路構成部材の内側面と、この内側面に対向するチューブ部構成部材の外側面とで構成したことを特徴とする。
【００１３】
そして、請求項４に記載の発明（以下、第４発明という）は、上記第１発明において、置換ガス通路を、チューブ部の長手方向に延びる中空部を有した通路構成部材により構成したことを特徴とする。
【００１４】
さらに、請求項５に記載の発明（以下、第５発明という）は、上記第１発明から第４発明において、通路構成部材を、チューブ部構成部材に対して脱着可能としたことを特徴とする。
【００１６】
そして、請求項６に記載の発明（以下、第６発明という）は、上記第１発明から第５発明において、置換ガス通路内に、縦シール手段からの押付け力による通路構成部材の変形を防止する補強部材を備えたことを特徴とする。
【００１７】
さらに、請求項７に記載の発明（以下、第７発明という）は、上記第１発明から第５発明において、置換ガス通路内を、複数の通路にセパレートしたことを特徴とする。
【００１８】
上記のように構成したことにより、本願各発明はそれぞれ次のように作用する。
【００１９】
まず、第１発明によれば、チューブ部に、その長手方向に延びて袋状包材内の空気を不活性ガスに置換するための置換ガス通路を設ける場合に、この置換ガス通路を、上記チューブ部の外側面に、該チューブ部の外周面を構成するとともに上記不活性ガス供給用の置換ガス通路を形成する別部材の通路構成部材を該チューブ部の長手方向に沿って取り付けるようにしたので、例えば、溶接による通路構成部材のチューブ部外側面への固着作業や加工が容易になり、チューブ部の製作が安価にできるようになる。また、溶接箇所はチューブ部の外面側であるので、チューブ部内面には凹凸や隙間が生じることはなく、被包装物の円滑な落下、導入が達成されるようになる。そして、上記通路構成部材に、縦シール手段による押付け力を受ける受け部を設けたので、該受け部の剛性はチューブ部構成部材単体の場合に比較して高くなり、大きな押付け力によっても変形しなくなる。したがって、縦シールを良好に行うことができるようになる。
【００２０】
次に、第２発明によれば、置換ガス通路を、チューブ部構成部材をその長手方向に沿って内方に向けて陥入させるように設けた凹部と、該凹部を閉鎖する通路構成部材とで構成したので、チューブ部全体の外形形状の大幅な変更がなくなる。しかも、上記第１発明と同様、チューブ部内面側に溶接箇所を設けることなく、置換ガス通路を構成することができるようになる。特に、この第２発明によれば、チューブ部構成部材に凹部を設けたことにより該部材自体の剛性も高くなり、受け部の剛性は一層高くなる。
【００２１】
また、第３発明によれば、置換ガス通路を、チューブ部の長手方向に沿って外方へ膨出した通路構成部材の内側面と、この内側面に対向するチューブ部構成部材の外側面とで構成したので、チューブ部構成部材の形状を大きく変えることなく置換ガス通路を取り付けることができるようになる。しかも、上記第１発明と同様、チューブ部内面側に溶接箇所を設けることなく、置換ガス通路を構成することができるようになる。
【００２２】
そして、第４発明によれば、置換ガス通路を、チューブ部の長手方向に延びる中空部を有した通路構成部材により構成したので、この通路構成部材のチューブ部構成部材外側面への固着作業は一層容易になる。
【００２３】
さらに、第５発明によれば、通路構成部材を、チューブ部構成部材に対して脱着可能としたので、この通路構成部材の取り替えが容易になる。したがって、例えば、通路構成部材が破損した場合、速やかな対処ができるようになる。
【００２６】
そして、第６発明によれば、置換ガス通路内に、縦シール手段からの押付け力による通路構成部材の変形を防止する補強部材を備えたので、大きな押付け力によっても一層変形しなくなる。したがって、縦シールを一層良好に行うことができるようになる。
【００２７】
さらに、第７発明によれば、置換ガス通路内を、複数の通路にセパレートしたので、例えば、区分されたある通路を空気吸引のための通路とし、また別の通路を置換ガス通路とすることができるようになる。この場合、包装作業の初期に、ある通路を用いて包材内の空気を吸引しながら、別の通路を用いて不活性ガスを供給することにより、包材内の空気を不活性ガスに速やかに置換することができるようになる。
【００２８】
【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。
【００２９】
図１に示すように、この実施の形態に係る製袋包装機１は機台２を有し、その後部上方に、包材のロールを回転可能に支持するロール支持部（図示せず）が設けられているとともに、該機台２の前部上方には、フォーマ１０が配設されている。
【００３０】
このフォーマ１０は、フレーム１１に、セーラ部材１２と、該セーラ部材１２を上下に貫通するチューブ部構成部材１３とを取り付けて一体化した構成で（図２参照）、上記ロール支持部から前方へ繰り出された帯状の包材を下方へ案内しながら、その左右両側縁部を重ね合わせるように成形するようになっており、上記機台２の前部上面に脱着可能に取り付けられている。
【００３１】
ここで、上記チューブ部構成部材１３におけるセーラ部材１２より上方に突出した上部１４は、投入される被包装物を受け入れるべく上端が広く開口した略円錐状とされており、また、上記セーラ部材１２より下方に延びる下部１５は、袋状に成形された包材内に突入して被包装物を該包材内に導入するようになっている。
【００３２】
また、このチューブ部構成部材１３の下部１５の左右両側には、包材を該チューブ部構成部材下部１５の左右両側面１５ａ，１５ａに押しつけながら下方へ送るベルト式の送り装置３，３が配置されているとともに、該チューブ部構成部材下部１５の前方には、機台２の前面に支持部材４を介して支持され、包材の互いに重ね合わされた左右両側縁部を溶着して該包材を筒状に成形する縦シール装置５が配置されている。
【００３３】
ここで、上記チューブ部構成部材１３の下部１５における送り装置３，３が押し付けられる左右両側面１５ａ，１５ａは平面状に形成されているとともに、この実施の形態では、該チューブ部構成部材下部１５は後面１５ｃ側が開放されている（図３参照）。
【００３４】
さらに、機台２の前面における該チューブ部構成部材下部１５の下端部よりやや下方には、筒状に成形された包材を前後両側から挟み付けて、該包材の所定位置を横方向に溶着するとともに、その溶着部の略中央部を横方向に切断することにより、筒状の包材に底部を形成して袋状とし、かつ該袋状包材の被包装物が導入された部分の上方を封止する横シール装置６が配置されている。また、該横シール装置６の下方には、上記のようにして形成された袋を機外に搬出する搬出装置７が配置されている。
【００３５】
以上の構成に加えて、この製袋包装機１においては、チューブ部構成部材１３に置換ガス通路２０が設けられている。
【００３６】
この置換ガス通路２０は、上記チューブ部構成部材１３の前面側を、その上部１４から下部１５の下端部にわたって内方に向けて陥入させるとともに、これにより形成されたチューブ部構成部材１３の長手方向に延びる凹部１３ａ（図３参照）を覆うように、細長い通路構成部材２１をチューブ部構成部材１３の外側面から張り付けて、該通路構成部材２１とチューブ部構成部材１３の前面部との間に上下に延びる空間を形成することにより設けられている。その場合に、上記通路構成部材２１の基本断面形状は、上記チューブ部構成部材１３の断面形状に沿うよう湾曲状とされ、また、該通路構成部材２１の下部には、縦シール装置５が押し付けられるように、平面状とされた箇所２１ａが設けられている。
【００３７】
そして、図４に拡大して示すように、該置換ガス通路２０の上端部は、上記通路構成部材２１をチューブ部構成部材１３の上部１４において凹部１３ａの上縁部に接続することにより閉塞されているとともに、該通路構成部材２１の上部前面に置換ガス通路２０内に通じる入口２２が設けられ、この入口２２に置換ガスの供給管が接続されるようになっている。また、図５に拡大して示すように、該置換ガス通路２０の下端部は開放され、置換ガスの出口２３とされている。
【００３８】
次に、この実施の形態の作用を説明する。
【００３９】
製袋包装機１を作動させると、機台２の後部に設けられたロール支持部から帯状の包材が前方に繰り出され、該機台２の前部上方で下方へ送られながら、該包材がフォーマ１０を構成するセーラ部材１２により左右両側縁部が重なり合うように折り曲げられる。また、送り装置３，３によりさらに下方に送られ、チューブ部構成部材１３の下部１５の前面側で、上記のようにして重ね合わされた包材の左右両側縁部が縦シール装置５により溶着され、筒状とされる。このとき、この筒状包材の下端部は、前回の包装動作時に、横シール装置６により閉じられて袋状とされている。そして、図６に示すように、その袋状包材Ｃがさらに下方に送られた後、該包材Ｃ内に、チューブ部構成部材１３を通じて上方から被包装物Ｘ…Ｘが投入される。
【００４０】
また、この被包装物Ｘ…Ｘの投入と並行して、外部の供給装置から置換ガス通路２０を通じて窒素ガスやアルゴンガス等の不活性ガスが袋状包材Ｃ内に供給されるとともに、これと入れ替わりに該包材Ｃ内の空気がチューブ部構成部材１３の上端部やセーラ部材１２による包材曲成部等から外部に排出され、該袋状包材Ｃ内の空気が不活性ガスに置換される。
【００４１】
その後、袋状包材Ｃは、図６に鎖線で示すように、被包装物Ｘ…Ｘが導入された部分より上方位置で、上記横シール装置６における一対のバー部材６ａ，６ａにより封止されるとともに、その上方で該包材の上流部分から切り離され、下方の搬出装置７上に投下される。なお、このとき、切断された包材の上流側部分の下端部も封止され、該部分が底部を有する袋状に成形されて、次の被包装物の導入に備えられる。
【００４２】
このようにして、所定量の被包装物Ｘ…Ｘが封入され、しかも内部が不活性ガスで充満されてなる袋詰め製品が連続的に生成され、上記搬出装置７によって順次、機外に搬出される。
【００４３】
その場合に、特にこの製袋包装機１によれば、置換ガス通路２０を、チューブ部構成部材１３に設けられてその長手方向に延びる凹部１３ａを覆うように、細長い通路構成部材２１をチューブ部構成部材１３の外面側から固着して構成しているので、置換ガス通路２０の配設が容易になる。また、溶接箇所はチューブ部構成部材１３の外側面であるので、チューブ部構成部材１３内面には凹凸や隙間は生じなくなり、被包装物Ｘ…Ｘの円滑な落下、導入が達成されるようになる。
【００４４】
さらに、チューブ部構成部材１３にその長手方向に延びる凹部１３ａを設けたことにより、該チューブ部構成部材１３自体の剛性が高くなっていることに加えて、上記凹部１３ａを覆うように細長い通路構成部材２１を張り付けているので、該通路構成部材２１を含むチューブ部全体としての剛性は一層高くなり、縦シール装置５による押付け力を受ける箇所としては好適となる。
【００４５】
なお、上記の実施の形態では、チューブ部構成部材１３の下部１５は後面１５ｃ側が開放されていたが、被包装物の性状等によっては後面側が閉じたチューブ部構成部材を用いてもよい。この場合、特にチューブ部構成部材と通路構成部材との溶接作業性の良さが顕著に現れるようになる。
【００４６】
また、上記の実施の形態では、チューブ部構成部材１３の形状に沿うように両側部が湾曲した通路構成部材２１を用いたが、施工性やコスト等の理由により平面状の通路構成部材を用いてもよい。
【００４７】
ところで、上記の実施の形態では、チューブ部構成部材１３の下部１５の前面と通路構成部材２１とで構成される置換ガス通路２０の下部２０ａを、チューブ部構成部材１３に設けられた凹部１３ａの深さを下方ほど深くすることで該通路構成部材２１を下方ほど凹部１３ａの底部より離反させて、図３に示す偏平な断面形状の幅ｘ及び厚みｙを下方ほど大きくすることにより、通路としての流路断面積が下方ほど広くなるように設けていた。
【００４８】
この場合、上記置換ガス通路２０の下部２０ａが下方ほど流路断面積が広くなるように設けられているから、包装速度の高速化に伴って不活性ガスの流速を速くしても、該通路２０の下端の出口２３から袋状包材Ｃ内に導入される際の該ガスの流速は比較的低速となる。
【００４９】
したがって、不活性ガスが包材Ｃ内に勢いよく吹き出して該包材Ｃ内の被包装物Ｘ…Ｘを吹き上げ、或いは被包装物Ｘ…Ｘの包材Ｃ内への導入を妨げたりすることがなく、該被包装物Ｘ…Ｘが包材Ｃ内に良好に導入されて、横シール装置６の一対のバー部材６ａ，６ａによって噛み込まれることが防止される。
【００５０】
また、上記の実施の形態では、図５に示すように、上記チューブ部構成部材１３に設けられた凹部１３ａの底部下端１５′を通路構成部材２１の下端２１′より下方に位置させることにより、上記出口２３を前面側、即ちチューブ部構成部材１３の外方へ向けて開口するように設けていた。
【００５１】
この場合、上記置換ガス通路２０の下端のガス出口２３はチューブ部構成部材１３の外方に向けて開口されているから、該チューブ部構成部材１３の下端の開口部にエアカーテン状のガス層が形成されることがなく、このガス層によって被包装物Ｘ…Ｘの包材Ｃ内への導入が妨げられることもない。
【００５２】
なお、上記以外の実施の形態につき、以下に説明する。
【００５３】
まず、図７に、長手方向に延びる凹部を有さないチューブ部構成部材１１３に、長手方向に外方へ膨出させられているとともに、平面状とされた箇所１２１ａを設けた通路構成部材１２１を張り付けて、置換ガス通路１２０を構成した例を示す。この場合、チューブ部構成部材１１３の形状を大きく変えることなく、置換ガス通路１２０を設けることができるようになる。
【００５４】
次に、図８に、長手方向に延びる凹部を有さないチューブ部構成部材２１３に、上記図７における通路構成部材１２１に類似する形状を有した通路構成部材２２１を張り付けて、置換ガス通路２２０を構成した例を示す。この場合には、通路構成部材２２１の内側面に対向するチューブ部構成部材２１３の外側面に、平面状とされた箇所２１３ｂが設けられているので、該箇所２１３ｂへの上記通路構成部材２２１の張り付けが一層容易になる。
【００５５】
また、図９に、略台形状の長手方向に延びる中空部３２１ｂを有した通路構成部材３２１を、チューブ部構成部材３１３の外側面で平面状とされた箇所３１３ｂに張り付けて、置換ガス通路３２０を構成した例を示す。この場合、板状の通路構成部材に比較して、張り付け作業は容易になるとともに、気密性の一層良好な置換ガス通路３２０が得られるようになる。
【００５６】
そして、図１０に、通路構成部材４２１をチューブ部構成部材４１３に対して脱着可能とした構成例を示す。この場合、チューブ部構成部材４１３に設けられた凹部４１３ａの長手方向に沿った両縁部には、通路構成部材４２１を案内するガイド部４１３ｃ，４１３ｃが設けられている。一方、通路構成部材４２１の長手方向に沿った両側部には、上記ガイド部４１３ｃ，４１３ｃに対応する差し込み部４２１ｃ，４２１ｃが設けられている。そして、通路構成部材４２１は、該差し込み部４２１ｃ，４２１ｃがガイド部４１３ｃ，４１３ｃに案内されながらチューブ部構成部材４１３に差し込まれることにより、チューブ部構成部材４１３に取り付けられて、置換ガス通路４２０が構成されている。また、上記構成により、通路構成部材４２１をチューブ部構成部材４１３から容易に取り外すこともできるようになる。
【００５７】
さらに、図１１に、通路構成部材５２１をチューブ部構成部材５１３に対して脱着可能とした別の構成例を示す。この場合、通路構成部材５２１に対向するチューブ部構成部材５１３の外側面で平面状とされた箇所５１３ｂの中央部分に、長手方向に延びて通路構成部材５２１を案内する断面が略Ｔ字状のガイド部５１３ｃが突設されている。一方、通路構成部材５２１は、置換ガス通路５２０となる略台形状の空間を形成するように成形されているとともに、そのチューブ部構成部材５１３に対向する面に、上記ガイド部５１３ｃに対応するスリット５２１ｄが設けられている。そして、このスリット５２１ｄと上記ガイド部５１３ｃとを嵌合させることにより、通路構成部材５２１がチューブ部構成部材５１３に取り付けられて、置換ガス通路５２０が構成されている。また、上記構成により、通路構成部材５２１をチューブ部構成部材５１３から容易に取り外すこともできるようになる。
【００５８】
また、図１２に、補強部材６２４を固着した通路構成部材６２１を用いて、置換ガス通路６２０を構成した例を示す。この構成により、縦シール装置５からの押付け力を受ける受け部となる通路構成部材６２１の平面状とされた箇所６２１ａは、補強部材６２４により補強されるので、変形が防止されるようになる。なお、上記の例では、補強部材６２４は通路構成部材６２１の内側面に固着されていたが、チューブ部構成部材６１３の外側面に固着されていてもよい。
【００５９】
さらに、上記補強部材６２４に、置換ガス通路６２０を複数の通路にセパレートする機能を持たせることも可能である。図例では、置換ガス通路６２０は、補強部材６２４により２つの通路にセパレートされている。この場合、例えば、セパレートされた一方の通路６２０′を空気吸引用に、そして、他方の通路６２０″を不活性ガス供給用に使用することができるようになる。
【００６０】
【発明の効果】
以上のように、本願の第１発明によれば、チューブ部に、その長手方向に延びて袋状包材内の空気を不活性ガスに置換するための置換ガス通路を設ける場合に、この置換ガス通路を、上記チューブ部の外側面に、該チューブ部の外周面を構成するとともに上記不活性ガス供給用の置換ガス通路を形成する別部材の通路構成部材を該チューブ部の長手方向に沿って取り付けるようにしたので、例えば、溶接による通路構成部材のチューブ部外側面への固着作業や加工が容易になり、チューブ部の製作が安価にできるようになる。また、溶接箇所はチューブ部の外面側であるので、チューブ部内面には凹凸や隙間が生じることはなく、被包装物の円滑な落下、導入が達成されるようになる。そして、上記通路構成部材に、縦シール手段による押付け力を受ける受け部を設けたので、該受け部の剛性はチューブ部構成部材単体の場合に比較して高くなり、大きな押付け力によっても変形しなくなる。したがって、縦シールを良好に行うことができるようになる。
【００６１】
次に、第２発明によれば、置換ガス通路を、チューブ部構成部材をその長手方向に沿って内方に向けて陥入させるように設けた凹部と、該凹部を閉鎖する通路構成部材とで構成したので、チューブ部全体の外形形状の大幅な変更がなくなる。しかも、上記第１発明と同様、チューブ部内面側に溶接箇所を設けることなく、置換ガス通路を構成することができるようになる。特に、この第２発明によれば、チューブ部構成部材に凹部を設けたことにより該部材自体の剛性も高くなり、受け部の剛性は一層高くなる。
【００６２】
また、第３発明によれば、置換ガス通路を、チューブ部の長手方向に沿って外方へ膨出した通路構成部材の内側面と、この内側面に対向するチューブ部構成部材の外側面とで構成したので、チューブ部構成部材の形状を大きく変えることなく置換ガス通路を取り付けることができるようになる。しかも、上記第１発明と同様、チューブ部内面側に溶接箇所を設けることなく、置換ガス通路を構成することができるようになる。
【００６３】
そして、第４発明によれば、置換ガス通路を、チューブ部の長手方向に延びる中空部を有した通路構成部材により構成したので、この通路構成部材のチューブ部構成部材外側面への固着作業は一層容易になる。
【００６４】
さらに、第５発明によれば、通路構成部材を、チューブ部構成部材に対して脱着可能としたので、この通路構成部材の取り替えが容易になる。したがって、例えば、通路構成部材が破損した場合、速やかな対処ができるようになる。
【００６７】
そして、第６発明によれば、置換ガス通路内に、縦シール手段からの押付け力による通路構成部材の変形を防止する補強部材を備えたので、大きな押付け力によっても一層変形しなくなる。したがって、縦シールを一層良好に行うことができるようになる。
【００６８】
さらに、第７発明によれば、置換ガス通路内を、複数の通路にセパレートしたので、例えば、区分されたある通路を空気吸引のための通路とし、また別の通路を置換ガス通路とすることができるようになる。この場合、包装作業の初期に、ある通路を用いて包材内の空気を吸引しながら、別の通路を用いて不活性ガスを供給することにより、包材内の空気を不活性ガスに速やかに置換することができるようになる。
【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】同製袋包装機におけるフォーマの拡大正面図である。
【図３】チューブ部構成部材下部の横断平面図である。
【図４】図２のア−ア線によるチューブ部構成部材上部の拡大縦断側面図である。
【図５】同じくイ−イ線によるチューブ部構成部材下部の拡大縦断側面図である。
【図６】チューブ部材下端部における置換ガスの導入状態を示す説明図である。
【図７】別の実施の形態に係るチューブ部構成部材下部の断面平面図である。
【図８】同じく別の形態に係るチューブ部構成部材下部の断面平面図である。
【図９】同じく別の形態に係るチューブ部構成部材下部の断面平面図である。
【図１０】同じく別の形態に係るチューブ部構成部材下部の断面平面図である。
【図１１】同じく別の形態に係るチューブ部構成部材下部の断面平面図である。
【図１２】同じく別の形態に係るチューブ部構成部材下部の断面平面図である。
【図１３】従来の置換ガス通路の構成とその問題点を示す説明図である。
【符号の説明】
１製袋包装機
５縦シール装置
１０フォーマ
１２セーラ部材
１３，１１３，２１３，３１３，４１３，５１３，６１３
チューブ部構成部材
１３ａ，４１３ａ凹部
１４チューブ部構成部材上部
１５，１１５，２１５，３１５，４１５，５１５，６１５
チューブ部構成部材下部
２０，１２０，２２０，３２０，４２０，５２０，６２０
置換ガス通路
２１，１２１，２２１，３２１，４２１，５２１，６２１
通路構成部材
２１ａ，１２１ａ，２２１ａ，３２１ａ，４２１ａ，５２１ａ，６２１ａ
平面状箇所（受け部）
４１３ｃ，５１３ｃガイド部
６２４補強部材
Ｃ袋状包材
Ｘ被包装物[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag making and packaging machine that inserts an article into a packaging material and seals it while forming a belt-shaped packaging material into a bag shape, 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 supplies a band-shaped packaging material to the former for forming the packaging bag, and forms a cylindrical shape by overlapping the left and right side edges. In addition, the overlapping portion of the cylindrical packaging material is heat-welded along the longitudinal direction by a vertical sealing device on the front surface of the article introduction tube portion constituting member forming the former, and the cylindrical packaging by the horizontal sealing device. The material is thermally welded in the width direction perpendicular to the longitudinal direction and formed into a bag shape, and then the material to be packaged is introduced into the bag-shaped packaging material from above through the tube member, and the upper part is By sealing with the said horizontal sealing apparatus and cut | disconnecting from the upstream part of a packaging material, the product formed by sealing a to-be-packaged item in a packaging bag is produced | generated.
[0003]
In that case, if the packaged item is food, the air in the bag-like packaging material into which the packaged item has been introduced is converted to an inert gas such as nitrogen gas or argon gas in order to prevent its decay or alteration. After the replacement, the upper part is sealed, and a structure for that is disclosed in, for example, Japanese Patent Laid-Open No. 10-53217.
[0004]
The gas replacement device disclosed in this publication is provided with a replacement gas passage extending in the vertical direction on the inner surface of the article introduction tube member, supplying an inert gas from the upper end inlet, and flowing out from the lower end outlet. Thus, the inert gas is fed into the bag-shaped packaging material, whereby the air in the packaging material is discharged and replaced with the inert gas.
[0005]
[Problems to be solved by the invention]
By the way, this type of replacement gas passage is usually formed by attaching a passage constitution member B to the inside of a tube portion constitution member A having a circular cross-sectional shape from the top to the bottom as shown in FIG. It is configured by forming a space G extending vertically between the component member B and the tube portion component member A. In this case, the passage component member B is usually fixed by welding at predetermined locations W ... W inside the tube portion component member A.
[0006]
However, it is difficult to weld the passage component member B to the inside of the tube component member A. In particular, when the tube component member A is completely cylindrical as shown in the figure, it becomes more difficult, and the welding points W. It will be difficult to finish smoothly. If irregularities or gaps occur in the welded portions W ... W, it may hinder the smooth fall and introduction of the package. That is, the package to be packaged introduced inside the tube member A is caught in the unevenness or enters the gap and stays there, and the package may not fall smoothly inside the tube component A. In some cases, the inner volume of the package may be excessive or insufficient, or the packaged item may be caught in the lateral seal portion.
[0007]
In addition, when the packaged item is a food, if the debris of the packaged item is caught in the unevenness or enters the gap and stays there, there may be a problem of hygiene because various germs may propagate.
[0008]
Therefore, the present invention has an object of facilitating the construction and providing no irregularities or gaps on the inner surface of the tube member constituting member when arranging the replacement gas passage in the bag making and packaging machine in which gas replacement is performed. And
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is configured as follows.
[0010]
  First, the invention according to claim 1 (hereinafter, referred to as the first invention) includes a former having a sailor part and a tube part connected to the sailor part, and forming a strip-shaped packaging material into a cylindrical shape, Longitudinal sealing means for sealing the overlapping portions of the left and right side edges of the packaging material formed into a cylindrical shape by the former along the longitudinal direction, and the packaging material by sealing the packaging material in a direction perpendicular to the longitudinal direction And a transverse sealing means for forming the bag into a bag shape, introducing the packaged article into the bag-shaped packaging material through the inside of the tube portion, and inerting the air in the packaging material Bag making and packaging machine that replaces gasBecauseFurther, another member constituting the outer peripheral surface of the tube portion and forming a replacement gas passage for supplying the inert gas on the outer surface of the tube portion.ButAttached along the longitudinal direction of the tubeAnd the passage component member is provided with a receiving portion for receiving the pressing force by the vertical sealing means.It is characterized by that.
[0011]
Next, in the invention described in claim 2 (hereinafter referred to as the second invention), in the first invention, the replacement gas passage is indented with the tube portion constituting member directed inward along the longitudinal direction thereof. It is characterized by comprising a concave portion provided in this manner and a passage constituting member for closing the concave portion.
[0012]
The invention according to claim 3 (hereinafter referred to as the third invention) is the inner surface of the passage constituting member according to the first invention, in which the replacement gas passage is bulged outward along the longitudinal direction of the tube portion. And an outer side surface of the tube portion constituting member facing the inner side surface.
[0013]
The invention according to claim 4 (hereinafter referred to as the fourth invention) is that, in the first invention, the replacement gas passage is constituted by a passage constituting member having a hollow portion extending in the longitudinal direction of the tube portion. Features.
[0014]
Furthermore, the invention according to claim 5 (hereinafter referred to as the fifth invention) is characterized in that, in the first to fourth inventions, the passage component member is detachable from the tube portion component member. .
[0016]
  AndClaim 6Described in the following (hereinafter referred to as6th inventionSaid)1st invention to 5th inventionIn the present invention, the replacement gas passage is provided with a reinforcing member for preventing the passage constituting member from being deformed by the pressing force from the vertical sealing means.
[0017]
  further,Claim 7Described in the following (hereinafter referred to as7th inventionSaid)1st invention to 5th inventionThe replacement gas passage is separated into a plurality of passages.
[0018]
By configuring as described above, each invention of the present application operates as follows.
[0019]
  First, according to the first invention, when the tube portion is provided with a replacement gas passage that extends in the longitudinal direction and replaces the air in the bag-shaped packaging material with an inert gas, On the outer surface of the tube portion, a separate member constituting the outer peripheral surface of the tube portion and forming the replacement gas passage for supplying the inert gas is attached along the longitudinal direction of the tube portion. Therefore, for example, the work of fixing the passage component member to the outer surface of the tube portion by welding or processing becomes easy, and the tube portion can be manufactured at low cost. Further, since the welded portion is on the outer surface side of the tube portion, there are no irregularities or gaps on the inner surface of the tube portion, and smooth dropping and introduction of the packaged object can be achieved.Further, since the passage component member is provided with a receiving portion that receives the pressing force by the vertical sealing means, the rigidity of the receiving portion is higher than that of the tube portion component member alone, and is deformed even by a large pressing force. Disappear. Therefore, the vertical seal can be performed satisfactorily.
[0020]
  Next, according to the second invention, the replacement gas passage is provided with a concave portion provided so as to indent the tube portion constituent member inward along the longitudinal direction thereof, and the passage constituent member for closing the concave portion. As a result, there is no significant change in the outer shape of the entire tube portion. Moreover, similarly to the first invention, the replacement gas passage can be configured without providing a welding point on the inner surface side of the tube portion.In particular, according to the second aspect of the present invention, since the concave portion is provided in the tube portion constituting member, the rigidity of the member itself is increased, and the rigidity of the receiving portion is further increased.
[0021]
According to the third aspect of the present invention, the replacement gas passage has an inner surface of the passage component member bulging outward along the longitudinal direction of the tube portion, and an outer surface of the tube portion component member facing the inner surface. Therefore, the replacement gas passage can be attached without greatly changing the shape of the tube member. Moreover, similarly to the first invention, the replacement gas passage can be configured without providing a welding point on the inner surface side of the tube portion.
[0022]
According to the fourth aspect of the present invention, the replacement gas passage is constituted by a passage constituent member having a hollow portion extending in the longitudinal direction of the tube portion. Therefore, the fixing operation of the passage constituent member to the outer surface of the tube portion constituent member is as follows. It becomes easier.
[0023]
Furthermore, according to the fifth aspect, since the passage component member can be attached to and detached from the tube portion component member, the passage component member can be easily replaced. Therefore, for example, when the passage component member is damaged, it is possible to quickly cope with it.
[0026]
  And6th inventionAccording to the above, since the reinforcing member for preventing the deformation of the passage component member due to the pressing force from the vertical seal means is provided in the replacement gas passage, the replacement gas passage is not further deformed even by a large pressing force. Therefore, vertical sealing can be performed more satisfactorily.
[0027]
  further,7th inventionAccording to the above, since the replacement gas passage is separated into a plurality of passages, for example, a sectioned passage can be used as a passage for air suction, and another passage can be used as a replacement gas passage. . In this case, at the initial stage of the packaging operation, the air in the packaging material is quickly sucked into the inert gas by supplying the inert gas through another passage while sucking the air in the packaging material using a certain passage. Can be replaced with
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0029]
As shown in FIG. 1, the bag making and packaging machine 1 according to this embodiment has a machine base 2, and a roll support portion (not shown) for rotatably supporting a roll of packaging material is provided above the rear portion thereof. A former 10 is disposed above the front portion of the machine base 2.
[0030]
This former 10 has a structure in which a sailor member 12 and a tube portion constituting member 13 penetrating vertically through the sailor member 12 are attached to and integrated with a frame 11 (see FIG. 2), and forward from the roll support portion. While guiding the drawn strip-shaped packaging material downward, the left and right side edges are formed so as to overlap each other, and are detachably attached to the upper surface of the front part of the machine base 2.
[0031]
Here, the upper part 14 protruding upward from the sailor member 12 in the tube part constituting member 13 has a substantially conical shape whose upper end is wide open so as to accept the article to be packaged, and the sailor member 12. The lower part 15 extending further downward enters the packaging material formed into a bag shape and introduces an article to be packaged into the packaging material.
[0032]
Also, belt-type feeding devices 3 and 3 are arranged on both the left and right sides of the lower portion 15 of the tube portion constituting member 13 to feed the packaging material downward while pressing the packaging material against the left and right side surfaces 15a and 15a of the tube portion constituting member lower portion 15 In front of the lower part 15 of the tube portion constituting member, the packaging material is supported by a support member 4 on the front surface of the machine base 2 and the left and right side edges of the packaging material overlapped with each other are welded. A vertical sealing device 5 for forming the cylinder into a cylindrical shape is disposed.
[0033]
Here, the left and right side surfaces 15a, 15a to which the feeding devices 3, 3 in the lower portion 15 of the tube portion constituting member 13 are pressed are formed in a flat shape, and in this embodiment, the tube portion constituting member lower portion 15 is formed. The rear surface 15c side is open (see FIG. 3).
[0034]
Further, slightly below the lower end portion of the lower part 15 of the tube portion constituting member 15 on the front surface of the machine base 2, a cylindrically shaped packaging material is sandwiched from both the front and rear sides, and a predetermined position of the packaging material is set in the lateral direction. A portion in which a bag is formed by forming a bottom portion in a cylindrical packaging material by cutting a substantially central portion of the welding portion in a lateral direction while being welded, and the packaged material of the bag-shaped packaging material is introduced A horizontal sealing device 6 is arranged to seal the upper side. A carry-out device 7 for carrying out the bag formed as described above to the outside of the machine is disposed below the horizontal seal device 6.
[0035]
In addition to the above configuration, in the bag making and packaging machine 1, a replacement gas passage 20 is provided in the tube portion constituting member 13.
[0036]
The replacement gas passage 20 indents the front side of the tube part constituting member 13 inward from the upper part 14 to the lower end part of the lower part 15, and the length of the tube part constituting member 13 formed thereby. The elongate passage constituting member 21 is attached from the outer surface of the tube portion constituting member 13 so as to cover the recessed portion 13a (see FIG. 3) extending in the direction, and between the passage constituting member 21 and the front portion of the tube portion constituting member 13 It is provided by forming a space extending vertically. In this case, the basic cross-sectional shape of the passage constituting member 21 is curved so as to follow the cross-sectional shape of the tube portion constituting member 13, and the vertical seal device 5 is pressed against the lower portion of the passage constituting member 21. As shown, a planar portion 21a is provided.
[0037]
As shown in an enlarged view in FIG. 4, the upper end portion of the replacement gas passage 20 is blocked by connecting the passage constituting member 21 to the upper edge portion of the recessed portion 13 a at the upper portion 14 of the tube portion constituting member 13. In addition, an inlet 22 leading to the inside of the replacement gas passage 20 is provided on the upper front surface of the passage constituting member 21, and a replacement gas supply pipe is connected to the inlet 22. Further, as shown in an enlarged view in FIG. 5, the lower end portion of the replacement gas passage 20 is opened to serve as a replacement gas outlet 23.
[0038]
Next, the operation of this embodiment will be described.
[0039]
When the bag making and packaging machine 1 is actuated, a belt-like packaging material is fed forward from a roll support provided at the rear of the machine base 2 and is fed downwards above the front part of the machine base 2 while The material is bent by the sailor member 12 constituting the former 10 so that the left and right side edges overlap. Further, the left and right side edges of the packaging material, which are fed further downward by the feeding devices 3 and 3 and overlapped as described above, are welded by the vertical sealing device 5 on the front side of the lower portion 15 of the tube portion constituting member 13. It is made cylindrical. At this time, the lower end portion of the cylindrical packaging material is closed by the lateral sealing device 6 at the time of the previous wrapping operation to be a bag shape. Then, as shown in FIG. 6, after the bag-like packaging material C is further sent downward, the articles to be packaged X to X are introduced into the packaging material C from above through the tube portion constituting member 13.
[0040]
In parallel with the introduction of the articles to be packaged X ... X, an inert gas such as nitrogen gas or argon gas is supplied into the bag-like packaging material C through the replacement gas passage 20 from an external supply device. Instead, the air in the packaging material C is discharged to the outside from the upper end portion of the tube member 13 or the packaging material bending portion by the sailor member 12, and the air in the bag-like packaging material C becomes an inert gas. Replaced.
[0041]
After that, the bag-like packaging material C is sealed by a pair of bar members 6a and 6a in the lateral sealing device 6 at a position above the portion where the article X. At the same time, it is separated from the upstream portion of the packaging material and is dropped onto the unloading device 7 below. At this time, the lower end portion of the upstream portion of the cut packaging material is also sealed, and the portion is formed into a bag shape having a bottom portion to prepare for the introduction of the next article to be packaged.
[0042]
In this way, a bag-filled product in which a predetermined amount of articles to be packed X... X is sealed and the inside is filled with an inert gas is continuously generated, and is sequentially carried out by the carrying-out device 7 to the outside. Is done.
[0043]
In this case, in particular, according to the bag making and packaging machine 1, the elongated passage constituting member 21 is provided with the tube portion so that the replacement gas passage 20 covers the concave portion 13a provided in the tube portion constituting member 13 and extending in the longitudinal direction thereof. Since the component member 13 is fixed from the outer surface side, the replacement gas passage 20 is easily arranged. In addition, since the welded portion is the outer surface of the tube member 13, the inner surface of the tube member 13 is free from irregularities and gaps, so that the articles X. Become.
[0044]
Further, by providing the tube portion constituting member 13 with a recess 13a extending in the longitudinal direction thereof, the tube portion constituting member 13 itself has a high rigidity, and in addition, an elongated passage structure is formed so as to cover the recess 13a. Since the member 21 is pasted, the rigidity of the entire tube portion including the passage constituting member 21 is further increased, and it is suitable as a place for receiving the pressing force by the vertical seal device 5.
[0045]
In the above embodiment, the lower surface 15 of the tube portion constituting member 13 is open on the rear surface 15c side, but a tube portion constituting member having a closed rear surface side may be used depending on the properties of the package. In this case, especially the good workability of welding between the tube member and the passage member appears remarkably.
[0046]
Moreover, in said embodiment, although the channel | path component member 21 which the both sides curved along the shape of the tube part component member 13 was used, a planar channel | path component member is used for reasons, such as workability and cost. May be.
[0047]
By the way, in said embodiment, the lower part 20a of the replacement gas channel | path 20 comprised by the front surface of the lower part 15 of the tube part structural member 13 and the channel | path structural member 21 of the recessed part 13a provided in the tube part structural member 13 is used. By increasing the depth downward, the passage component 21 is moved away from the bottom of the recess 13a downward, and the width x and thickness y of the flat cross-sectional shape shown in FIG. The cross-sectional area of the channel was set so as to increase toward the bottom.
[0048]
In this case, the lower portion 20a of the replacement gas passage 20 is provided so that the cross-sectional area of the flow passage becomes wider as it goes downward. Therefore, even if the flow rate of the inert gas is increased as the packaging speed is increased, the passage 20 The flow rate of the gas when introduced into the bag-like packaging material C from the outlet 23 at the lower end of 20 is relatively low.
[0049]
Therefore, the inert gas blows out vigorously into the packaging material C, blows up the packaging material X ... X in the packaging material C, or prevents the packaging material X ... X from being introduced into the packaging material C. Thus, the articles to be packaged X ... X are satisfactorily introduced into the packaging material C and are prevented from being bitten by the pair of bar members 6a, 6a of the lateral seal device 6.
[0050]
Further, in the above embodiment, as shown in FIG. 5, by positioning the bottom lower end 15 ′ of the recess 13 a provided in the tube portion constituting member 13 below the lower end 21 ′ of the passage constituting member 21, The outlet 23 is provided so as to open toward the front side, that is, toward the outside of the tube member 13.
[0051]
In this case, since the gas outlet 23 at the lower end of the replacement gas passage 20 is opened to the outside of the tube member 13, an air curtain-like gas layer is formed at the lower end of the tube member 13. Is not formed, and this gas layer does not hinder the introduction of the articles X to X into the packaging material C.
[0052]
The embodiments other than those described above will be described below.
[0053]
First, in FIG. 7, the passage component member 121 is provided with a flat portion 121 a while being bulged outwardly in the longitudinal direction on the tube portion component member 113 having no recess extending in the longitudinal direction. An example in which the replacement gas passage 120 is configured by pasting is shown. In this case, the replacement gas passage 120 can be provided without greatly changing the shape of the tube portion constituent member 113.
[0054]
Next, in FIG. 8, a passage component member 221 having a shape similar to the passage component member 121 in FIG. 7 is attached to a tube portion component member 213 having no recess extending in the longitudinal direction, and the replacement gas passage 220 is attached. The example which comprised is shown. In this case, since the flat portion 213b is provided on the outer surface of the tube portion constituting member 213 facing the inner surface of the passage constituting member 221, the passage constituting member 221 to the place 213b is provided. Sticking becomes easier.
[0055]
Further, in FIG. 9, a passage-constituting member 321 having a substantially trapezoidal hollow portion 321 b extending in the longitudinal direction is attached to a portion 313 b that is flat on the outer surface of the tube-constituting member 313, and the replacement gas passage 320 is attached. The example which comprised is shown. In this case, as compared with the plate-like passage constituent member, the pasting operation is facilitated, and the replacement gas passage 320 having better airtightness can be obtained.
[0056]
FIG. 10 shows a configuration example in which the passage constituting member 421 can be attached to and detached from the tube portion constituting member 413. In this case, guide portions 413 c and 413 c for guiding the passage constituting member 421 are provided at both edge portions along the longitudinal direction of the concave portion 413 a provided in the tube portion constituting member 413. On the other hand, insertion portions 421c and 421c corresponding to the guide portions 413c and 413c are provided on both side portions along the longitudinal direction of the passage constituting member 421. The passage constituting member 421 is attached to the tube portion constituting member 413 by inserting the insertion portions 421c, 421c into the tube portion constituting member 413 while being guided by the guide portions 413c, 413c, and the replacement gas passage 420 is formed. It is configured. Further, with the above configuration, the passage component member 421 can be easily removed from the tube portion component member 413.
[0057]
Further, FIG. 11 shows another configuration example in which the passage constituting member 521 can be attached to and detached from the tube portion constituting member 513. In this case, the cross-section extending in the longitudinal direction and guiding the passage component member 521 is substantially T-shaped at the central portion of the portion 513b that is flat on the outer surface of the tube portion member 513 facing the passage member 521. A guide portion 513c is projected. On the other hand, the passage constituting member 521 is formed so as to form a substantially trapezoidal space to be the replacement gas passage 520, and a slit corresponding to the guide portion 513c is formed on a surface facing the tube portion constituting member 513. 521d is provided. Then, by fitting the slit 521d and the guide portion 513c, the passage constituting member 521 is attached to the tube portion constituting member 513 to constitute the replacement gas passage 520. Further, with the above configuration, the passage component member 521 can be easily detached from the tube portion component member 513.
[0058]
FIG. 12 shows an example in which the replacement gas passage 620 is configured using the passage constituting member 621 to which the reinforcing member 624 is fixed. With this configuration, the planar portion 621a of the passage constituting member 621 serving as a receiving portion that receives the pressing force from the vertical sealing device 5 is reinforced by the reinforcing member 624, so that deformation is prevented. In the above example, the reinforcing member 624 is fixed to the inner side surface of the passage constituting member 621, but may be fixed to the outer side surface of the tube portion constituting member 613.
[0059]
Further, the reinforcing member 624 can have a function of separating the replacement gas passage 620 into a plurality of passages. In the illustrated example, the replacement gas passage 620 is separated into two passages by a reinforcing member 624. In this case, for example, one separated passage 620 ′ can be used for air suction and the other passage 620 ″ can be used for supplying inert gas.
[0060]
【The invention's effect】
  As described above, according to the first invention of the present application, when the tube portion is provided with a replacement gas passage that extends in the longitudinal direction and replaces the air in the bag-shaped packaging material with the inert gas, this replacement is performed. A gas passage is formed on the outer side surface of the tube portion, and an outer peripheral surface of the tube portion is formed, and another passage member constituting the replacement gas passage for supplying the inert gas is provided along the longitudinal direction of the tube portion. Therefore, for example, it becomes easy to fix and process the passage component member on the outer surface of the tube portion by welding, and the tube portion can be manufactured at low cost. Further, since the welded portion is on the outer surface side of the tube portion, there are no irregularities or gaps on the inner surface of the tube portion, and smooth dropping and introduction of the packaged object can be achieved.Further, since the passage component member is provided with a receiving portion that receives the pressing force by the vertical sealing means, the rigidity of the receiving portion is higher than that of the tube portion component member alone, and is deformed even by a large pressing force. Disappear. Therefore, the vertical seal can be performed satisfactorily.
[0061]
  Next, according to the second invention, the replacement gas passage is provided with a concave portion provided so as to indent the tube portion constituent member inward along the longitudinal direction thereof, and the passage constituent member for closing the concave portion. As a result, there is no significant change in the outer shape of the entire tube portion. Moreover, similarly to the first invention, the replacement gas passage can be configured without providing a welding point on the inner surface side of the tube portion.In particular, according to the second aspect of the present invention, since the concave portion is provided in the tube portion constituting member, the rigidity of the member itself is increased, and the rigidity of the receiving portion is further increased.
[0062]
According to the third aspect of the present invention, the replacement gas passage has an inner surface of the passage component member bulging outward along the longitudinal direction of the tube portion, and an outer surface of the tube portion component member facing the inner surface. Therefore, the replacement gas passage can be attached without greatly changing the shape of the tube member. Moreover, similarly to the first invention, the replacement gas passage can be configured without providing a welding point on the inner surface side of the tube portion.
[0063]
According to the fourth aspect of the present invention, the replacement gas passage is constituted by a passage constituent member having a hollow portion extending in the longitudinal direction of the tube portion. Therefore, the fixing operation of the passage constituent member to the outer surface of the tube portion constituent member is as follows. It becomes easier.
[0064]
Furthermore, according to the fifth aspect, since the passage component member can be attached to and detached from the tube portion component member, the passage component member can be easily replaced. Therefore, for example, when the passage component member is damaged, it is possible to quickly cope with it.
[0067]
  And6th inventionAccording to the above, since the reinforcing member for preventing the deformation of the passage component member due to the pressing force from the vertical seal means is provided in the replacement gas passage, the replacement gas passage is not further deformed even by a large pressing force. Therefore, vertical sealing can be performed more satisfactorily.
[0068]
  further,7th inventionAccording to the above, since the replacement gas passage is separated into a plurality of passages, for example, a sectioned passage can be used as a passage for air suction, and another passage can be used as a replacement gas passage. . In this case, at the initial stage of the packaging operation, the air in the packaging material is quickly sucked into the inert gas by supplying the inert gas through another passage while sucking the air in the packaging material using a certain passage. Can be replaced with
[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 an enlarged front view of a former in the bag making and packaging machine.
FIG. 3 is a cross-sectional plan view of the lower part of the tube member.
4 is an enlarged vertical side view of the upper part of the tube component member taken along the line of FIG.
FIG. 5 is an enlarged longitudinal sectional side view of the lower part of the tube member constituting the same line.
FIG. 6 is an explanatory view showing a state of introduction of replacement gas at the lower end portion of the tube member.
FIG. 7 is a cross-sectional plan view of a lower part of a tube component member according to another embodiment.
FIG. 8 is a cross-sectional plan view of the lower part of the tube portion constituting member according to another embodiment.
FIG. 9 is a cross-sectional plan view of the lower part of the tube portion constituting member according to another embodiment.
FIG. 10 is a cross-sectional plan view of the lower part of the tube component member according to another embodiment.
FIG. 11 is a cross-sectional plan view of the lower part of the tube portion constituting member according to another embodiment.
FIG. 12 is a cross-sectional plan view of the lower part of the tube component member according to another embodiment.
FIG. 13 is an explanatory view showing a configuration of a conventional replacement gas passage and its problems.
[Explanation of symbols]
1 Bag making and packaging machine
5 Vertical seal device
10 Forma
12 Sailor parts
13, 113, 213, 313, 413, 513, 613
Tube component
13a, 413a recess
14 Tube part component upper part
15, 115, 215, 315, 415, 515, 615
Tube part component lower part
20, 120, 220, 320, 420, 520, 620
Replacement gas passage
21, 121, 221, 321, 421, 521, 621
Passage component
21a, 121a, 221a, 321a, 421a, 521a, 621a
Flat part (receiving part)
413c, 513c guide part
624 Reinforcing member
C Bag-shaped packaging material
X Package

Claims

A former having a sailor portion and a tube portion provided continuously to the sailor portion, and forming a band-shaped packaging material into a cylindrical shape, and overlapping portions of right and left side edges of the packaging material formed into a cylindrical shape by the former Vertical sealing means for sealing the packaging material along the longitudinal direction, and horizontal sealing means for molding the packaging material into a bag shape by sealing the packaging material in a direction perpendicular to the longitudinal direction. A bag making and packaging machine that passes through the inside of the tube part and introduces it into a bag-shaped packaging material, and replaces the air in the packaging material with an inert gas. on the outer surface, another member of the passage forming member forming a replacement gas passage of the inert gas supply is attached along the longitudinal direction of the tube portion together constitute the outer peripheral surface of the tube portion, By the vertical sealing means on the passage component Bag making and packaging machine, wherein a receiving portion for receiving the attaching force is provided.

The replacement gas passage is composed of a concave portion provided to indent the tube portion constituent member inward along the longitudinal direction thereof, and a passage constituent member that closes the concave portion. The bag making and packaging machine according to claim 1.

The replacement gas passage is composed of an inner surface of a passage component member that bulges outward along the longitudinal direction of the tube portion, and an outer surface of the tube member member that faces the inner surface. The bag making and packaging machine according to claim 1.

The bag making and packaging machine according to claim 1, wherein the replacement gas passage is constituted by a passage constituting member having a hollow portion extending in a longitudinal direction of the tube portion.

The bag making and packaging machine according to any one of claims 1 to 4, wherein the passage constituting member is detachable from the tube portion constituting member.

The bag making according to any one of claims 1 to 5, wherein a reinforcing member is provided in the replacement gas passage to prevent the passage constituting member from being deformed by a pressing force from the vertical sealing means. Packaging machine.

The bag making and packaging machine according to any one of claims 1 to 5, wherein the replacement gas passage is separated into a plurality of passages .