JP4060077B2

JP4060077B2 - Manufacturing method of flat bag with pleats

Info

Publication number: JP4060077B2
Application number: JP2001401549A
Authority: JP
Inventors: 盛高橋; 宏道稲垣
Original assignee: Chokoku Plast Corp
Current assignee: Chokoku Plast Corp
Priority date: 2001-12-28
Filing date: 2001-12-28
Publication date: 2008-03-12
Anticipated expiration: 2021-12-28
Also published as: JP2003200506A

Description

【０００１】
【産業上の利用分野】
本願発明は、内面同士を合掌状に接着され倒されたヒダを備えて被包装品を収容して開口を閉じて包装体になったときにヒダが垂下して底面部を隠し安定した自立性を有しタイトな包装形態を感じさせるヒダ付き扁平袋を連続的に量産することができるヒダ付き扁平袋の製造方法に関する。
【０００２】
【従来の技術】
例えば、特開平11-070947、特開平11-227801、特開平11-310248、特開平11-310276、特開平11-349013の自立型包装袋は、いわゆるドイパック形態の包装袋であり、前面部の両側縁と後面部の両側縁とが合掌状にリブ付けヒートシールを施され、立体的開袋状態にすると二つ折りのボトムガセット８が平面状に展開して船底形の底面部となり、前面部と底面部の稜及び後面部と底面部の稜に前記ヒダを備えていて底面部を隠す形態である。しかし、ドイパック形態の包装袋は、両側にサイドシールがあり側面部が無い船底形の独特の形態をしており、角底を有する包装袋とは明確な形態上の相違がある。
なお、特開平06-286758、特開2000-153852、特開2000-272634の自立型包装袋も、底部がドイパック形態と同一の包装袋である。
【０００３】
特開2000-185740、特開2000-229646、特開2000-309345の自立型包装袋は、袋が扁平状態に製袋され、前面部と後面部と側面部と底面部を有し前面部の端縁と側面部の端縁とが合掌状にリブ付けヒートシールを施され、又、後面部の端縁と側面部の端縁とが合掌状にリブ付けヒートシールを施され、立体的開袋状態において前記リブ付けヒートシールの下部が底面部の側縁に来て水平方向に延びている。この自立性包装袋は、前面部と底面部の稜と後面部と底面部の稜にヘム（折り癖）やヒダがないので、はっきりとした底面部が区画されておらず見栄えが悪く自立性が悪い。
【０００４】
特開2001-031110の不定形容器は、平袋に角マンドレルを突っ込んで角筒状にして角底面を形成し両側に形成される三角形の耳の際をボトムシールして耳部を切除してなる包装袋であり、側面部の下端に水平外方に延びるヒートシール部ができる。このヒートシール部は、水平外方にフランジ状に延びており、スマートな形態を阻害するデザインになるとともに、詰めて陳列するときに隣接の袋のヒダと踏み合うことになり邪魔になる。
【０００５】
特開2001-206385のサイドガセット平底袋は、前面部と後面部とサイドガセットを有する扁平袋に製袋され、角マンドレルを突っ込んで角筒状にして角底面を形成してからサイドガセットを閉じるようにＴ字型に扁平させた状態で底面両側縁にヒートシールを施して前面部と底面部の稜及び後面部と底面部の稜にそれぞれヒダを付けてなる包装袋であり、側面部の下端に水平外方に延びるヒートシール部ができる。このヒートシール部も、水平外方にフランジ状に延びており、スマートな形態を阻害するデザインになるとともに、詰めて陳列するときに隣接の袋のヒダと踏み合うことになり邪魔になる。
【０００６】
特開2001-206385の図１１に示す従来例のサイドガセット平底袋は、前面部と後面部とサイドガセットを有する扁平筒の下部に、別途のシート紙より折上げ形成した底面部を突っ込んで周縁をヒートシールして周面部の下端にヒダを有する形態に製袋されてなる。
このヒダは、折り返し合掌状ではないので扁平筒の端縁と底面部の端縁がぴったり一致することが少なく、何処かに皺が発生するヒートシールが行なわれ、外観が綺麗なヒダにはならず、全周ヒートシールが不完全になり液体容器には全く適さない。
【０００７】
【発明が解決しようとする課題】
本願発明は、上述した点に鑑み案出したもので、内面同士を合掌状に接着され倒されたヒダを備えて底面部を隠し自立性を有し、ヒダに皺が発生する惧れがなく外観が綺麗なヒダが得られ特にヒダとしての独立した外観を呈さず前面部や後面部又は周面部と一平面を形成してタイトな包装形態を感じさせ、ヒダ部分の完全密封が確保され液体容器として適するヒダ付き扁平袋を連続的に量産することができるヒダ付き扁平袋の製造方法を提供することを目的としている。
【０００８】
【課題を解決するための手段】
［請求項１］に記載の発明は、包材の原反ロールから包材を繰り出し、内面同士が合掌状にヒートシールされ上流側に倒されて包材の幅方向に延びるヒダを、所要寸法の配列ピッチとなるように形成し、次いで、ヒダが付いた包材をフォーマーに掛けて筒状に折り曲げて包材の端縁同士を接続シールすると共に両側にサイドガセットを入れて扁平筒にして、次いで、各ヒダより上流側へ前記サイドガセットの折り込み寸法と略同寸法を確保してその上流側にボトムヒートシールを施し、次いで各ボトムヒートシールの上流側の際をカットして上端開口タイプのヒダ付き扁平袋として切り離すことを特徴とするヒダ付き扁平袋の製造方法である。
【０００９】
［請求項２］に記載の発明は、包材の原反ロールから包材を繰り出し、内面同士が合掌状にヒートシールされ上流側に倒されて包材の幅方向に延びるヒダを、所要寸法の配列ピッチとなるように形成し、次いで、ヒダが付いた包材をフォーマーに掛けて筒状に折り曲げて包材の端縁同士を接続シールすると共に両側にサイドガセットを入れて扁平筒にして、次いで、各ヒダより下流側へ袋の高さ寸法離れた位置にトップヒートシールを施し、次いで各トップヒートシールの下流側の際をカットして下端開口タイプのヒダ付き扁平袋として切り離すことを特徴とするヒダ付き扁平袋の製造方法である。
【００１０】
［請求項３］に記載の発明は、前記サイドガセット入りの扁平筒を形成したら四枚重ねの両側縁にリブ付けヒートシールを施してリブを設けることを特徴とする［請求項１］又は［請求項２］に記載のヒダ付き扁平袋の製造方法である。
【００１１】
［請求項４］に記載の発明は、包材の原反ロールから包材を繰り出し、内面同士が合掌状にヒートシールされ上流側に倒されて包材の幅方向に延びるヒダを、所要寸法の配列ピッチとなるように形成し、次いで、ヒダが付いた包材をフォーマーに掛けて筒状に折り曲げて包材の端縁同士を接続シールして扁平筒にして、次いで、各ヒダより上流側へ前記サイドガセットの折り込み寸法と略同寸法を確保してその上流側にボトムヒートシールを施し、次いで各ボトムヒートシールの上流側の際をカットして上端開口タイプのヒダ付き扁平袋として切り離すことを特徴とするヒダ付き扁平袋の製造方法である。
【００１２】
［請求項５］に記載の発明は、包材の原反ロールから包材を繰り出し、内面同士が合掌状にヒートシールされ上流側に倒されて包材の幅方向に延びるヒダを、所要寸法の配列ピッチとなるように形成し、次いで、ヒダが付いた包材をフォーマーに掛けて筒状に折り曲げて包材の端縁同士を接続シールして扁平筒にして、次いで、各ヒダより下流側へ袋の高さ寸法離れた位置にトップヒートシールを施し、次いで各トップヒートシールの下流側の際をカットして下端開口タイプのヒダ付き扁平袋として切り離すことを特徴とするヒダ付き扁平袋の製造方法である。
【００１３】
［請求項６］に記載の発明は、包材の原反ロールから包材を繰り出し、内面同士が合掌状にヒートシールされ上流側に倒されて包材の幅方向に延びるヒダを、所要寸法の配列ピッチとなるように形成し、次いで、ヒダが付いた包材を幅が半分になるように縦方向に切り込みを入れ、二枚のヒダが付いた包材を内面同士が対面しかつヒダ同士が対応するように重ね合わせると共に、二枚の包材間の両側に一対の側面用包材を幅半分に二つ折りにしてサイドガセットとなるように挟んで四枚重ねの両側縁にリブ付けヒートシールを施しリブとして扁平筒を形成し、次いで、各ヒダより上流側へ前記サイドガセットの折り込み寸法と略同寸法を確保してその上流側にボトムヒートシールを施し、次いで各ボトムヒートシールの上流側の際をカットして上端開口タイプのヒダ付き扁平袋として切り離すことを特徴とするヒダ付き扁平袋の製造方法である。
【００１４】
［請求項７］に記載の発明は、包材の原反ロールから包材を繰り出し、内面同士が合掌状にヒートシールされ上流側に倒されて包材の幅方向に延びるヒダを、所要寸法の配列ピッチとなるように形成し、次いで、ヒダが付いた包材を幅が半分になるように縦方向に切り込みを入れ、二枚のヒダが付いた包材を内面同士が対面しかつヒダ同士が対応するように重ね合わせると共に、二枚の包材間の両側に一対の側面用包材を幅半分に二つ折りにしてサイドガセットとなるように挟んで四枚重ねの両側縁にリブ付けヒートシールを施しリブとして扁平筒を形成し、次いで、各ヒダより下流側へ袋の高さ寸法離れた位置にトップヒートシールを施し、次いで各トップヒートシールの下流側の際をカットして下端開口タイプのヒダ付き扁平袋として切り離すことを特徴とするヒダ付き扁平袋の製造方法である。
【００１５】
【発明の実施の形態】
図１(h)に示すヒダ付き扁平袋Ｐ1を袋単体として製袋される工程を説明してから、このヒダ付き扁平袋を連続的に量産することができる請求項１の発明の実施の形態にかかるヒダ付き扁平袋の製造方法について図２乃至図６を参照して説明するものとする。
図１(a)はヒダを形成した包材の斜視図である。図１(b)はヒダ付きの扁平筒とした状態を示す斜視図である。図１(c)は角筒状に開いた状態を示す斜視図である。図１(d)はサイドガセットを入れていく状態を示す斜視図である。図１(e)はサイドガセット入りの扁平筒とした状態を示す斜視図である。図１(f)はサイドガセット入りの扁平筒の両側にリブを付けた状態を示す斜視図である。図１(g)は図１(f)におけるｇ−ｇ断面図である。図１(h)はヒダ付き扁平袋の斜視図である。図１(i)はヒダ付き扁平袋を立体的に開いた状態を示す斜視図である。図１(j)は被包装品を収容して開口を閉じ合わせた状態を示す斜視図である。
このヒダ付き扁平袋Ｐ1は、図１(a)に示すようにヒダ１を形成した包材Ｆを、図１(b)に示すように強い折り目（ヘム）を付けない扁平筒状に略一巻きして後面部３の幅中央で包材Ｆの両端縁を隙間なく突き合わせてその内側に両面シーラントフィルムからなる三層の接続テープＴを目張りするように配して包材Ｆの両端縁を接続テープＴに対してヒートシールしてヘム無しの扁平筒としてから、図１(c)に示すように角筒状に開いて、図１(d)に示すように右側面部４と左側面部５を内方へ二つ折りして前面部２と後面部３との間に挟まれる一対のサイドガセットとなして、図１(e)に示すようにヘム付き、サイドガセット入りの扁平筒とし、次いで図１(f),(g)に示すように四枚重ねの両側縁にリブ付けヒートシールを施して四つのリブ６a,６b,６c,６dを設け、次いで図１(h)に示すように下端にボトムヒートシール７を施してなり、上端が袋開口となっている。
このヒダ付き扁平袋Ｐ1は、立体的に開くと、図１(i)に示すように、ヒダ１より下側部分に関し、両側に三角形のポケット状のボトムガセット８が入って平面展開して底面部９が形成され、ヒダ１が底面部９の周縁に垂下していてかつヒダ１が前面部２と右側面部４と左側面部５と後面部３に対して同一平面をなし独立した外観を呈さないのでタイトな包装形態を感じさせ、ヒダ１が底面部９を隠し安定した自立性角底袋となる。
被包装品を充填し、図１(j)に示すように、トップガセット１０が入った寄せ棟型の上面部１１を形成してトップヒートシール１２を施す。なお、トップガセット１０を入れることに限定されない。
【００１６】
図２は、図１に示すヒダ付き扁平袋Ｐ1を量産できるヒダ付き扁平袋の製造方法を実施するための製袋装置の概略の全体平面図を示す。
図３乃至図６は同製袋装置を四つに分けた各部分の概略の斜視図を示す。
図２乃至図６に示す製袋装置について符号と照合して説明する。
符号Ｒは包材の原反ロールである。符号１３は包材繰り出しロールであり、図示しないサーボモータにより増減速駆動されるようになっていて回転自在なニップロール１４と共同して原反ロールＲから包材Ｆを繰り出す。
符号１５はアキュムレータであり、包材繰り出しロール１３により繰り出される包材Ｆに一体に接続された二本の段差ロール１５a,１５bを載せて横から見て包材Ｆを上下に蛇行するように通して下流側の包材Ｆの引き出しに対する繰り出し抵抗を軽くて一定に保つ役目をする。前記包材繰り出しロール１３は、段差ロール１５a,１５bが下限位置に下がるとフィルムの繰り出し量を少なくし、又、段差ロール１５a,１５bが上限位置に上がるとフィルムの繰り出し量を多くする。
符号１６はヒダ付け装置であり、包材Ｆの下面（外面）を密着している上流側と下流側のスリット形成プレート１６a,１６bと、スリット形成プレート１６a,１６bの下側に対応するヒダ付け用ヒートシーラー１６c,１６dと、スリット形成プレート１６a,１６bの上側に対応して設けられ包材Ｆの上面をスリット形成プレート１６a,１６bへ押えつける包材押えプレート１６e,１６fと、スリット形成プレート１６a,１６bのスリット間に対応して包材Ｆの上側に設けられていてスリットに下降してヒダ折りを行なうヒダ折りプレート１６gとからなる。
ヒダ１の形成は、包材Ｆの走行停止時に行なう。最初に包材押えプレート１６fを下降し包材Ｆをスリット形成プレート１６bに押し付け、次いで、ヒダ折りプレート１６gを下降して包材Ｆをスリット形成プレート１６a,１６bのスリット間に突っ込んでヒダ折りを行ない、次いで、包材押えプレート１６eを下降し包材Ｆをスリット形成プレート１６aに押し付けてからヒダ折りプレート１６gを上昇復帰し、次いで、ヒダ付け用ヒートシーラー１６c,１６dを閉じて包材Ｆのヒダ折り合掌部にヒートシールを施してヒダ１を形成し、次いで、ヒダ付け用ヒートシーラー１６c,１６dを開くと共に、包材押えプレート１６e,１６fを上昇復帰させて、包材Ｆを走行可能にする。
符号１７はヒダ倒しプレートであり、例えば１.５ｍｍ〜３.０ｍｍの隙間があるように上下一対に設けられていて包材Ｆの走行を許してヒダ１を上流側に倒すようになっている。
符号１８はフォーマー、符号１９a,１９bは折り曲げガイド、符号２０a,２０bはフィルム誘導用コロ、符号２１はバー形背貼りヒートシーラー、符号２２a,２２bはフリー回転自在なサイドガセット折り込みロールである。符号２３は包材引き込みロールであり、上下一対に設けられていてサイドガセット入りの扁平筒部分を挟んでヒダの配列ピッチに等しい間欠送りとなるように下流方向へ引っ張るようになっている。符号２４a,２４bはリブ付け用ヒートシーラーである。符号２５はボトムヒートシーラーであり、上下一対に設けられていてサイドガセット入りの扁平筒部分を挟んでボトムヒートシールを施す。符号２６は包材引き込みロールであり、上下一対に設けられていてサイドガセット入りの扁平筒部分を挟んでヒダの配列ピッチに等しい間欠送りとなるように前記包材引き込みロール２３と同期して引っ張るようになっている。符号２７はカッターである。図４において、符号Ｗは接続テープの原反ロールである。原反ロールＷから繰り出される接続テープＴは、フォーマー１８の上で端縁同士を隙間無く合わされる包材Ｆの内側より目張りするように張り込まれる。
【００１７】
ヒダ付き扁平袋の製造方法を説明する。
包材繰り出しロール１３が包材の原反ロールＲから包材Ｆを繰り出し、包材引き込みロール２３，２６が袋高さ寸法とヒダからボトムヒートシールまでの底面部を形成するための寸法（好ましくはサイドガセットの折り込み寸法と略同寸法）とボトムヒートシールに必要な寸法との合計寸法に等しい長さになるように間欠送りを行なう。ヒダ付け装置１６が、包材Ｆが間欠停止する度に包材Ｆの内面同士が合掌状にヒートシールしてヒダ１を形成する。ヒダ１が形成されるピッチは、袋高さ寸法とヒダからボトムヒートシールまでの底面部を形成するための寸法とボトムヒートシールに必要な寸法との合計寸法に等しくなる。次いで、ヒダ倒しプレート１７が、通過して行くヒダ１を上流側に倒す。
次いで、ヒダ１が付いた包材Ｆをフォーマー１８により扁平筒に折り上げ、バー形背貼りヒートシーラー２１により接続テープＴを介して包材Ｆの端縁同士をヒートシール接続する。図２(a)におけるＡ−ＡからＢ−Ｂの区間では図２(b)に示すようにフォーマー１８が横長な厚板断面形状であり包材Ｆは図１(b)に示す扁平筒状になる。図２(a)におけるＣ−ＣからＤ−Ｄの区間ではフォーマー１８が「Ｈ」を横にした断面形状で図１(c)に示す角筒状になる。図２(a)におけるＥ−Ｅではフォーマー１８が「Ｈ」を横にした断面形状で上下面間の寸法が小さくなり両側にフリー回転自在なサイドガセット折り込みロール２２a,２２bが入り込んで図１(d)に示すようにサイドガセットが入れられる。図２(a)におけるＦ−Ｆでは包材引き込みロール２３により図１(f)に示すようにサイドガセット入りの扁平筒に折り上がる。
続いて、図２(a)におけるＧ−Ｇではリブ付け用ヒートシーラー２４a,２４bにより図１(f),(g)に示すように四枚重ねの両側縁にリブ付けヒートシールを施してなる四つのリブ６a,６b,６c,６dが設けられる。図２(a)におけるＨ−Ｈではボトムヒートシーラー２５により図１(h)に示すようにボトムヒートシール７が施される。
ボトムヒートシール７の位置は、カッター２７の側から数えて二つ目のヒダより上流側へサイドガセットの折り込み寸法と略同寸法を確保してその上流側の位置としてあるので、各ヒダより上流側へ前記サイドガセットの折り込み寸法と略同寸法を確保してその上流側にボトムヒートシールを施される。
図２(a)におけるＩ−Ｉではカッター２７によりボトムヒートシール７の上流側の際をカットされ、図１(h)に示す上端開口タイプのヒダ付き扁平袋Ｐ1が切り離され、以上で製袋が完了する。
【００１８】
図７(a)はリブ付きサイドガセット入りのヒダ付き扁平袋Ｐ2の斜視図である。図７(b)はヒダ付き扁平袋Ｐ2を立体的に開いた状態を示す斜視図である。図７(c)は図７(b)におけるC−C断面図である。
この図７に示す上端開口タイプのヒダ付き扁平袋Ｐ2を連続的に量産することができる製袋方法も、請求項１、３の発明のヒダ付き扁平袋の製造方法の実施の形態にかかるものである。
このヒダ付き扁平袋Ｐ2は、図２(a)において、ボトムヒートシーラー２５とカッター２７を交換する等により、図７(a)に示すようにヒダ１より下側部分の両角を略４５度にヒートシールされかつ三角形に切除されたリブ付きサイドガセット入りのヒダ付き扁平袋Ｐ2を製袋・量産することができる。なお、略４５度のカットは、後処理として行なうトリミングとしても良い。このヒダ付き扁平袋Ｐ2は、図７(b)に示すように立体的に開くと底面部に三角形のポケットが形成されない。
【００１９】
図８(a)はリブなしサイドガセット入りのヒダ付き扁平袋Ｐ3の斜視図である。図８(b)はヒダ付き扁平袋Ｐ3を立体的に開いた状態を示す斜視図である。
この図８に示す上端開口タイプのヒダ付き扁平袋Ｐ3を連続的に量産することができる製造方法も、請求項１、３の発明のヒダ付き扁平袋の製造方法の実施の形態にかかるものである。
このヒダ付き扁平袋Ｐ3は、図２(a)において、リブ付け用ヒートシーラー２４a,２４bを開いたままにして機能させないようしてリブを設けないときは、図８に示すように、リブ無しサイドガセット入りのヒダ付き扁平袋Ｐ3を製袋・量産することができる。又、変形例として、ボトムヒートシーラー２５とカッター２７を交換することにより、図７(a)に示すヒダ付き扁平袋Ｐ2と同様にヒダ１より下側部分の両角を略４５度にヒートシールされかつ三角形に切除されたヒダ付き扁平袋を製袋・量産することができる。
【００２０】
図９は下端開口タイプのリブ付きサイドガセット入りのヒダ付き扁平袋Ｐ4の斜視図である。図１０は下端開口タイプのリブなしサイドガセット入りのヒダ付き扁平袋Ｐ5の斜視図である。
この図９、図１０に示す下端開口タイプのヒダ付き扁平袋Ｐ4又はＰ5を連続的に量産することができる製袋方法は、請求項２、３の発明のヒダ付き扁平袋の製造方法の実施の形態にかかるものである。
図２(a)において、ボトムヒートシーラー２５の位置を上流側へ若干移動すると、トップヒートシーラーとして機能させることができ、トップヒートシールを施すことができ、次いで間欠送りが行なわれて間欠停止してトップヒートシールの下流側の際をカッター２７によりカットすると、図９に示すように、下端開口タイプのリブ付きサイドガセット入りのヒダ付き扁平袋Ｐ4を製袋・量産することができる。そして、リブ付け用ヒートシーラー２４a,２４bを開いたままにして機能させないようしてリブを設けないときは、図１０に示すように、下端開口タイプのリブ無しサイドガセット入りのヒダ付き扁平袋Ｐ5を製袋・量産することができる。
【００２１】
包材の水平方向の両端縁の閉じ合わせは、合掌型ヒートシールであっても良いし、又は一方の端縁の外面に他方の端縁の内面を密着して接着する、いわゆる封筒張りシールであっても良い。この場合、内側に重ねるヒダ１の二重の端縁のうち外側部分を所要形状に切り欠くと共に、外側に重ねるヒダ１の二重の端縁のうち内側部分を所要形状に切り欠いて重ね合わせてヒートシールすると、該閉じ合わせ箇所の両側のヒダ１が一枚状になる。さらに、包材の水平方向の両端縁の閉じ合わせ位置は、後面部中央ではなく、例えば、右側面と後面部との稜の近傍であっても良い。これらの変形例は、図２に示す製袋装置を若干変更すれば実現できる。
【００２２】
続いて、図１１(c)に示すヒダ付き扁平袋Ｐ6を袋単体として製袋される工程を説明してから、このヒダ付き扁平袋を連続的に量産することができる請求項４の発明の実施の形態にかかるヒダ付き扁平袋の製造方法について図１２を参照して説明するものとする。
図１１(a)はヒダを形成した包材の斜視図である。図１１(b)は扁平筒とした状態を示す斜視図である。図１１(c)は上端開口タイプのヒダ付き扁平袋の斜視図である。図１１(d) はヒダ付き扁平袋上部を開いた状態を示す斜視図である。図１１(e)は被包装品を収容して開口を閉じ合わせた状態を示す斜視図である。
このヒダ付き扁平袋Ｐ6は、図１１(a)に示すようにヒダ１を形成した包材Ｆを、図１１(b)に示すように扁平筒状に略一巻きして後面部３の幅中央で包材Ｆの両端縁を隙間なく突き合わせてその内側に両面シーラントフィルムからなる三層の接続テープＴを目張りするように配して包材Ｆの両端縁を接続テープＴに対してヒートシールして扁平筒としてから、図１１(c)に示すように下端にボトムヒートシール７を施してなり、上端が袋開口となっている。ヒダ１からボトムヒートシール７までの距離は特に限定が無く、小さい寸法のときは、袋の厚さが小さくなる。
包装するには、図１１(d)に示すように、このヒダ付き扁平袋の上部を開き被包装品を充填して図１１(e)に示すように、トップヒートシール１２を施す。袋に被包装品を充填すると、ヒダ１より下側部分が平面展開する。図１１(e)に示すように、ボトムヒートシール７の両端部分を互いに平行となる三角形の耳として内側へ倒すと両耳が折り畳まれた底面部９となってヒダ１の内側に隠れる。ヒダ１は周面部を延長した面を構成していて底面部９とはヒダ裏面上端より略直角となり該底面部を隠すことになる。
被包装品を充填し、図１１(e)に示すように、トップガセット１０が入った寄せ棟型の上面部１１を形成してトップヒートシール１２を施す。なお、トップガセット１０を入れることに限定されない。
このヒダ付き扁平袋は、ヒダ１が底面部９の周縁に垂下していてかつヒダ１が周面部に対して同一平面をなし独立した外観を呈さないのでタイトな包装形態を感じさせ、ヒダ１が底面部９を隠し安定した自立性角底袋となる。
このヒダ付き扁平袋の包装体は、いわゆる角底形のピロー包装体と略同一の外観になり、ヒダ１が底面部９の周縁に垂下していてかつヒダ１が周面に対して同一平面をなし独立した外観を呈さないのでタイトな包装形態を感じさせ、ヒダ１が底面部９を隠し安定した自立性角底袋となる。
【００２３】
図１２は請求項４の発明のヒダ付き扁平袋の製造方法の実施の形態にかかる。
図１２は、図１１(c)に示すヒダ付き扁平袋Ｐ6を量産できるヒダ付き扁平袋の製造方法を実施するための製袋装置の概略の全体平面図を示す。
図１２に示す製袋装置と図２に示す製袋装置との相違点は、サイドガセットを入れることができる構造と、そうではない構造との相違である。
具体的には、図１２に示す製袋装置においては、図２に示す製袋装置におけるサイドガセット折り込みロール２２a,２２bとリブ付け用ヒートシーラー２４a,２４b に対応する機械要素がない。
又、図１２に示す製袋装置においては、フォーマー１８aが下流側が方形で上流側が台形に広がっているプレートからなる。図２(a)に示す製袋装置のフォーマー１８とは形状が相違する。
ヒダ１を、該ヒダ１の配列ピッチが包材移送方向に該袋高さ寸法とヒダからボトムヒートシールまでの底面部を形成するための寸法とボトムヒートシールに必要な寸法との合計寸法に等しい間隔となるように形成することは、図２に示す製袋装置の場合と同じである。
ヒダ１を形成した包材Ｆをフォーマー１８aに掛けて、図１１(b)に示すように強い折り目（ヘム）を付けない扁平筒状に略一巻きしてバー形背貼りヒートシーラー２１により接続テープＴを介して包材Ｆの端縁同士をヒートシール接続してヘム無しの扁平筒としてから、ボトムヒートシーラー２５により下端にボトムヒートシール７を施し、次いで各ボトムヒートシールの上流側の際をカットして上端開口タイプのヒダ付き扁平袋として切り離すと、図１１(c)に示す上端開口タイプのヒダ付き扁平袋Ｐ6を製造できる。
【００２４】
図１３(a)は下端開口タイプのリブ付きサイドガセット無しのヒダ付き扁平袋Ｐ7の斜視図である。図１３(b)はヒダ付き扁平袋Ｐ7の下部を開き立体的に開いた状態の斜視図である。図１３(c)はヒダ付き扁平袋Ｐ7に被包装品を収容して開口を閉じてなる包装体の斜視図である。
図１３(a)に示す下端開口タイプのヒダ付き扁平袋Ｐ7を連続的に量産することができる製袋方法も、請求項５の発明のヒダ付き扁平袋の製造方法の実施の形態にかかるものである。
図１２において、ボトムヒートシーラー２５の位置を上流側へ若干移動すると、トップヒートシーラーとして機能させることができ、トップヒートシールを施すことができ、次いで間欠送りが行なわれて間欠停止してトップヒートシールの下流側の際をカッター２７によりカットすると、図１３(a)に示すように、下端開口タイプのリブ付きサイドガセット入りのヒダ付き扁平袋Ｐ7を製袋・量産することができる。
【００２５】
続いて、図１４(a)に示すヒダ付き扁平袋Ｐ8を袋単体として製袋される工程を説明してから、このヒダ付き扁平袋を連続的に量産することができる請求項６の発明の実施の形態にかかるヒダ付き扁平袋の製造方法について図１５を参照して説明するものとする。
図１４(a)はヒダ付き扁平袋Ｐ8の斜視図を示し、図１４(b)はヒダ付き扁平袋を立体に開いたときの斜視図を示す。図１４(c)は立体的に開いたヒダ付き扁平袋の水平断面図である。図１４(d)はヒダ付き扁平袋を構成する各包材の分解・配置状態を示す斜視図である。図１４(e)はサイドガセット入りの扁平筒を示す斜視図である。
このヒダ付き扁平袋Ｐ8は、図１４(d)に示すようにヒダ１を形成した包材２と３を重ね合わせ、かつ、包材２と３の間にサイドガセット（＝側面部）となる二つ折りのヒダなしの包材４と５を挟んで、図１４(e)に示すように四枚重ねの包材の端縁をリブ付けヒートシールしてサイドガセット入りリブ付きの扁平筒としてから、図１４(c)に示すように下端にボトムヒートシール７を施してなり、上端が袋開口となっている。ヒダ１からボトムヒートシール７までの距離はサイドガセットの折り込み寸法と略同寸法である。
包装するには、図１４(b)に示すようにこのヒダ付き扁平袋の上部を開く。ヒダ１は袋の前面部下端と後面部下端に備えていて、前後面方向から見たときボトムヒートシール７を隠すようになっている。図１４(a)に示すヒダ付き扁平袋Ｐ8と図１(h)に示すヒダ付き扁平袋Ｐ1との相違は、図１４(b)と図１(i)と比較して分るように、ヒダ１が前面部下端と後面部下端に備えているか、底面部の四方の下端に備えているかの相違である。ヒダ１は底面部９とはヒダ裏面上端より略直角となり該底面部を隠すことになる。
このヒダ付き扁平袋は、ヒダ１が前面部２、後面部３に対して同一平面をなし独立した外観を呈さないのでタイトな包装形態を感じさせ、ヒダ１が底面部９を隠し安定した自立性角底袋となる。
【００２６】
図１５は請求項６の発明のヒダ付き扁平袋の製造方法の実施の形態にかかる。
図１５は、図１４(a)に示すヒダ付き扁平袋Ｐ8を量産できるヒダ付き扁平袋の製造方法を実施するための製袋装置の概略の要部斜視図を示す。
図１５では、包材の原反ロールから包材を繰り出して該包材Ｆにヒダ１を形成するまでの部分を示していないと共に、リブ付け用ヒートシーラー２４a,２４bよりも下流側の部分を示していない。ヒダを形成するまでの部分は図２、図３と同一であり、又、リブ付け用ヒートシーラー２４a,２４bよりも下流側の部分は図５、図６と同一であるので省略している。
従って、このヒダ付き扁平袋の製造方法は、図２、図３に示すように、包材の原反ロールから包材を繰り出し、内面同士が合掌状にヒートシールされ上流側に倒されて包材の幅方向に延びるヒダを、該ヒダの配列ピッチが包材移送方向に該袋高さ寸法とヒダからボトムヒートシールまでの底面部を形成するための寸法とボトムヒートシールに必要な寸法との合計寸法に等しい間隔となるように形成する。
次いで、図１５に示すように、ヒダ１を形成した包材Ｆを垂直面内を走行させガイドロール２８に掛けてからＭ板２９に掛けてカッター３１で包材Ｆを半裁しガイドロール３０a,３０b,３０c,３０dに掛けて上下に分かれさせて下側に包材２（図１４(d)における包材２に対応）を水平面内を走行させると共に、上側に包材３（図１４(d)における包材３に対応）を水平面内を走行させ、一対の合わせロール３３により二枚のヒダ１が付いた包材２，３を内面同士が対面しかつヒダ同士が対応するように重ね合わせると共に、上下に離れた二枚の包材２、３間に対応して、原反ロールＲ2、Ｒ3から側面部用包材４、５を繰り出して三角板フォーマー３２a、３２bに掛けて幅半分に二つ折りにしてサイドガセットとなるように一対の合わせロール３３のところで包材２、３間に挟み込み、次いで、包材２、３と包材４の四枚重ねの端縁及び包材２、３と包材５の四枚重ねの端縁をリブ付け用ヒートシーラー２４a,２４bで挟圧してリブ付けヒートシールを施しリブとして扁平筒を形成するものである。
次いで、図５、図６に示すように、各ヒダより上流側へ前記サイドガセットの折り込み寸法と略同寸法を確保してその上流側にボトムヒートシールを施し、次いで各ボトムヒートシールの上流側の際をカットして上端開口タイプのヒダ付き扁平袋として切り離す。
【００２７】
図１６はヒダ付き扁平袋Ｐ9の斜視図である。図１６に示す下端開口タイプのヒダ付き扁平袋Ｐ9を量産することができる製袋方法は請求項７の発明のヒダ付き扁平袋の製造方法の実施の形態にかかるものである。
図１５において、ボトムヒートシーラー２５の位置を上流側へ若干移動すると、トップヒートシーラーとして機能させることができ、トップヒートシールを施すことができ、次いで間欠送りが行なわれて間欠停止してトップヒートシールの下流側の際をカッター２７によりカットすると、図１６に示すように、下端開口タイプのリブ付きサイドガセット入りのヒダ付き扁平袋Ｐ9を製袋・量産することができる。
【００２８】
ヒダ付き扁平袋を製作するための包材Ｆは例えば以下のような積層フィルムからなる。
(1) OPP 20μm／接着剤／LLDPE 20μm ・・・・（外層／内層：シーラント）
(2) OPP 20μm／接着剤／一軸延伸または二軸延伸HDPE／接着剤／LLDPE・・・・（外層／中間層／内層：シーラント）
(3) OPP 20μm／接着剤／アルミニウム箔／接着剤／LLDPE 20μm・・・・（外層／中間層／内層：シーラント）
(4) OPP（シリカ又はアルミナ蒸着層）／接着剤／一軸延伸または二軸延伸HDPE／接着剤／LLDPE 20μm・・・・（外層／中間層／内層：シーラント）
(5)PET20μm／接着剤／アルミニウム箔／接着剤／OPP20μm／接着剤／LLDPE 20μm・・・・（外層／中間層／中間層／中間層／内層：シーラント）
(6) 紙／接着剤付きLLDPE 50μm・・・・（外層／内層：シーラント）
(7) PET 12μm／接着剤／LLDPE 20μm ・・・・（外層／内層：シーラント）
(8) AL 19μm／接着剤／LLDPE 70μm・・・・（外層／内層：シーラント）
(9) PET・SiOx 12μm／接着剤／LLDPE 100μm ・・・・（外層／内層：シーラント）
(10) CPP 5μm・OPP 30μm共押出し／接着剤／CPP 20μm ・・・・（外層／内層；内外面シーラント）
ヒダ１をヒートシールにより形成するために、包材Ｆの構成は、上記の積層フィルムの例示から分かるように内面がシーラントフィルムとなっている。なお、包材Ｆはシーラントフィルム単体より構成されていても良い。
【００２９】
本願発明のヒダ付き扁平袋の製造方法は、ヒダを袋の下端のみでなく、中段と上端にも備えるようにする場合も含まれる。
【００３０】
【発明の効果】
以上説明してきたように、本願発明のヒダ付き扁平袋の製造方法は、原反を繰り出して帯状に三枚重ねとなるように折り返して該折り返し部分の内面同士を接着してなるヒダを形成し、ヒダを有する包材を少なくとも前面部と後面部の下端又は周面部の下端に備えて底面部を隠すようにしたヒダ付き扁平袋を量産することができる。
本願発明のヒダ付き扁平袋の製造方法は、包材が平面のときにヒダを形成してから袋を作るので、ヒダに皺が発生する惧れがなく外観が綺麗なヒダが得られ、ヒダが前後面の延長端縁に位置し、ヒダとしての独立した外観を呈さず前面部や後面部又は周面部と一平面を形成しいるのでタイトな包装形態を感じさせ、包装形態として美観に優れており、ヒダ部分の完全密封が確保され液体容器として適するヒダ付き扁平袋が製造できる。
【図面の簡単な説明】
【図１】請求項１に記載の発明にかかるヒダ付き扁平袋製造方法により製造されるヒダ付き扁平袋の袋単体としての製造工程図である。
図１(a)はヒダを形成した包材の斜視図である。図１(b)はヒダ付きの扁平筒とした状態を示す斜視図である。図１(c)は角筒状に開いた状態を示す斜視図である。図１(d)はサイドガセットを入れていく状態を示す断面図である。図１(e)はサイドガセット入りの扁平筒とした状態を示す斜視図である。図１(f)はサイドガセット入りの扁平筒の両側にリブを付けた状態を示す斜視図である。図１(g)は図１(f)におけるｇ−ｇ断面図である。図１(h)は上端開口タイプのヒダ付き扁平袋の斜視図である。図１(i)はヒダ付き扁平袋を立体的に開いた状態を示す斜視図である。図１(j)は被包装品を収容して開口を閉じ合わせた状態を示す斜視図である。
【図２】請求項１に記載の発明にかかるヒダ付き扁平袋の製造方法を示すもので、図２(a)は図１に示すヒダ付き扁平袋を量産できる製袋装置の概略の全体平面図である。図２(b)は図２(a)におけるＡ−Ａ断面図である。図２(c)は図２(a)におけるＣ−Ｃ断面図である。図２(d)は図２(a)におけるＥ−Ｅ断面図である。
【図３】図２に示す製袋装置を四つに分けた最上流側部分の斜視図を示す。
【図４】図３に示す部分の下流側に隣接する部分の斜視図を示す。
【図５】図４に示す部分の下流側に隣接する部分の斜視図を示す。
【図６】図５に示す部分の下流側に隣接する部分の斜視図を示す。
【図７】請求項１、３の発明のヒダ付き扁平袋の製造方法により製造されるヒダ付き扁平袋を示すもので、図７(a)は上端開口タイプのリブ付きサイドガセット入りのヒダ付き扁平袋の斜視図である。図７(b)はヒダ付き扁平袋を立体的に開いた状態を示す斜視図である。図７(c)は図７(b)におけるC−C断面図である。
【図８】請求項１、３の発明のヒダ付き扁平袋の製造方法により製造される上端開口タイプのヒダ付き扁平袋を示すもので、図８(a)はリブなしサイドガセット入りのヒダ付き扁平袋の斜視図である。図８(b)はヒダ付き扁平袋を立体的に開いた状態を示す斜視図である。
【図９】請求項１、３の発明のヒダ付き扁平袋の製造方法により製造されるヒダ付き扁平袋を示すもので、下端開口タイプのリブ付きサイドガセット入りのヒダ付き扁平袋の斜視図である。
【図１０】請求項１、３の発明のヒダ付き扁平袋の製造方法により製造されるヒダ付き扁平袋を示すもので、下端開口タイプのリブなしサイドガセット入りのヒダ付き扁平袋の斜視図である。
【図１１】請求項４の発明の実施の形態にかかるヒダ付き扁平袋の製造方法により製造される上端開口タイプのヒダ付き扁平袋の袋単体としての製造工程図である。
図１１(a)はヒダを形成した包材の斜視図である。図１１(b)に扁平筒とした状態を示す斜視図である。図１１(c)は上端開口タイプのヒダ付き扁平袋の斜視図である。図１１(d) ヒダ付き扁平袋上部を開いた状態を示す斜視図である。図１１(e)は被包装品を収容して開口を閉じ合わせた状態を示す斜視図である。
【図１２】請求項４の発明のヒダ付き扁平袋の製造方法により製造されるヒダ付き扁平袋を示すもので、図１１(c)に示すヒダ付き扁平袋を量産できるヒダ付き扁平袋の製造方法を実施するための製袋装置の概略の全体平面図を示す。
【図１３】請求項５の発明のヒダ付き扁平袋の製造方法により製造される下端開口タイプのヒダ付き扁平袋を示す。図１３(a)は下端開口タイプのリブ付きサイドガセット無しのヒダ付き扁平袋の斜視図である。図１３(b)はヒダ付き扁平袋の下部を開き立体的に開いた状態の斜視図である。図１３(c)はヒダ付き扁平袋に被包装品を収容して開口を閉じてなる包装体の斜視図である。
【図１４】請求項６の発明の実施の形態にかかるヒダ付き扁平袋の製造方法により製造されるヒダ付き扁平袋の袋単体としての製造工程図である。
図１４(a)は上端開口タイプのヒダ付き扁平袋の斜視図を示し、図１４(b)はヒダ付き扁平袋を立体に開いたときの斜視図を示す。図１４(c)は図１４(b)におけるC−C断面図である。図１４(d)はヒダ付き扁平袋を構成する各包材の分解・配置状態を示す斜視図である。図１４(e)はサイドガセット入りの扁平筒を示す斜視図である。
【図１５】請求項６の発明のヒダ付き扁平袋の製造方法により製造されるヒダ付き扁平袋を示すもので、図１４(a)に示すヒダ付き扁平袋を量産できるヒダ付き扁平袋の製造方法を実施するための製袋装置の概略の全体平面図を示す。
【図１６】請求項７の発明のヒダ付き扁平袋の製造方法により製造される下端開口タイプのヒダ付き扁平袋を示す。
【符号の説明】
Ｆ・・・包材、１・・・ヒダ、２・・・前面部、３・・・後面部、４・・・右側面部、５・・・左側面部、Ｔ・・・接続テープ、６a，６b，６c，６d・・・リブ、７・・・ボトムヒートシール、８・・・ボトムガセット、９・・・底面部、１０・・・トップガセット、１１・・・上面部、１２・・・トップヒートシール、１３・・・包材繰り出しロール、１４・・・ニップロール、Ｒ・・・原反ロール、１５・・・アキュムレータ、１５a,１５b・・・段差ロール、１６・・・ヒダ付け装置、１６a,１６b・・・スリット形成プレート、１６c,１６d・・・ヒダ付け用ヒートシーラー、１６e,１６f・・・包材押えプレート、１６g・・・ヒダ折りプレート、１７・・・ヒダ倒しプレート、１８，１８a・・・フォーマー、１９a,１９b・・・折り曲げガイド、２０a,２０b・・・フィルム誘導用コロ、２１・・・バー形背貼りヒートシーラー、２２a,２２b・・・サイドガセット折り込みロール、２３・・・包材引き込みロール、２４a,２４b・・・リブ付け用ヒートシーラー、２５・・・ボトムヒートシーラー、２６・・・包材引き込みロール、２７・・・カッター、２８・・・ガイドロール、２９・・・Ｍ板、３０a,３０b,３０c,３０d・・・ガイドロール、３１・・・カッター、３２a、３２b・・・三角板フォーマー、３３・・・合わせロール、Ｒ2、Ｒ3・・・原反ロール、[0001]
[Industrial application fields]
The invention of the present application is provided with folds that are bonded to each other in the shape of a palm and accommodates an item to be packaged, and when the opening is closed to form a package, the folds hang down to conceal the bottom portion and stabilize itself. The present invention relates to a method for manufacturing a flat bag with folds that can continuously mass-produce flat bags with folds that have a tight packaging form.
[0002]
[Prior art]
For example, the self-supporting packaging bags of JP-A-11-070947, JP-A-11-227801, JP-A-11-310248, JP-A-11-310276, and JP-A-11-349013 are so-called doipack type packaging bags, Both side edges and both side edges of the rear surface are ribbed and heat-sealed, and when the bag is three-dimensionally opened, the two-folded bottom gusset 8 expands into a flat surface to form a bottom-shaped bottom part. And the ridges of the bottom surface portion and the ridges of the rear surface portion and the bottom surface portion are provided with the folds to hide the bottom surface portion. However, the Doipack type packaging bag has a unique shape of a ship bottom with side seals on both sides and no side portions, and has a clear difference in form from a packaging bag having a square bottom.
Note that the self-supporting packaging bags disclosed in Japanese Patent Laid-Open Nos. 06-286758, 2000-153852, and 2000-272634 are also the same packaging bags as the doipack type.
[0003]
JP 2000-185740, JP 2000-229646, and JP 2000-309345 self-standing packaging bags are made in a flat state and have a front surface portion, a rear surface portion, a side surface portion, and a bottom surface portion. The edge of the edge and the edge of the side are ribbed and heat sealed, and the edge of the rear and the edge of the side are ribbed and heat sealed. In the bag state, the lower part of the ribbed heat seal comes to the side edge of the bottom part and extends in the horizontal direction. This self-supporting packaging bag has no hems or creases on the ridges on the front and bottom surfaces, and on the ridges on the rear and bottom surfaces. Is bad.
[0004]
The irregular container disclosed in JP 2001-031110 is formed by cutting a corner mandrel into a flat bag to form a rectangular tube shape, forming a bottom surface of the corner, and bottom-sealing the triangular ears formed on both sides to cut off the ears. A heat-seal part extending horizontally outward at the lower end of the side part. This heat seal portion extends in a flange shape horizontally outward, and has a design that obstructs a smart form, and when it is packed and displayed, it will step on the folds of the adjacent bag, which is in the way.
[0005]
The side gusset flat bottom bag disclosed in Japanese Patent Laid-Open No. 2001-206385 is formed into a flat bag having a front surface portion, a rear surface portion, and a side gusset, and a square mandrel is formed into a rectangular tube shape to form a square bottom surface, and then the side gusset is closed. In this state, the packaging bag is formed by heat-sealing both side edges of the bottom surface in a state of being flattened in a T-shape and attaching creases to the ridges on the front surface portion and the bottom surface portion and the ridges on the rear surface portion and the bottom surface portion, A heat seal portion extending horizontally outward is formed at the lower end. This heat seal part also extends horizontally outward in a flange shape, which is a design that obstructs the smart form, and when it is packed and displayed, it will step on the folds of the adjacent bag, which will be in the way.
[0006]
The conventional side gusset flat bottom bag shown in FIG. 11 of Japanese Patent Application Laid-Open No. 2001-206385 has a bottom portion formed by folding up a separate sheet from the bottom of a flat tube having a front surface portion, a rear surface portion and a side gusset. The bag is made into a form having a crease at the lower end of the peripheral surface by heat sealing.
Since these folds are not folded back, the edges of the flat tube and the bottom edge are unlikely to be exactly aligned, and heat sealing that generates wrinkles is performed somewhere, resulting in a pleat with a beautiful appearance. Therefore, the all-around heat seal is incomplete and is not suitable for liquid containers.
[0007]
[Problems to be solved by the invention]
The invention of the present application has been devised in view of the above-mentioned points, and has folds that are bonded to each other in the shape of a palm, and has a self-supporting property by concealing the bottom surface, and there is no risk of wrinkles occurring on the folds. A beautiful pleat is obtained, and it does not have an independent appearance as a crease, but it forms a flat surface with the front, rear, or peripheral surface, making it feel tight and tightly sealed. It aims at providing the manufacturing method of the flat bag with a fold which can mass-produce the flat bag with a fold suitable as a container continuously.
[0008]
[Means for Solving the Problems]
The invention described in [Claim 1] is that the packaging material is fed out from the original roll of the packaging material, the inner surfaces are heat-sealed in a palm-like shape, and the pleats extending in the width direction of the packaging material are collapsed to the required dimensions. Next, fold the packaging material with crease on the former and fold it into a cylinder to connect and seal the edges of the packaging material, and put side gussets on both sides to make a flat cylinder Next, the side gusset is secured to the upstream side of each fold, and the bottom heat seal is applied to the upstream side of the side gusset, and then the upstream side of each bottom heat seal is cut to open the upper end. It is a manufacturing method of the flat bag with a pleat characterized by separating as a flat bag with a pleat.
[0009]
The invention described in [Claim 2] is characterized in that the packaging material is fed out from the original roll of the packaging material, the inner surfaces are heat-sealed in a palm-like shape, and the pleats extending in the width direction of the packaging material are tilted upstream. Next, fold the packaging material with crease on the former and fold it into a cylinder to connect and seal the edges of the packaging material, and put side gussets on both sides to make a flat cylinder Then, top heat seal is applied to the position away from the height of the bag to the downstream side of each fold, and then the downstream side of each top heat seal is cut and separated as a flat bag with a fold of the lower end opening type. It is a manufacturing method of the flat bag with a pleat characterized by it.
[0010]
[Claim 3] The invention described in [Claim 3] is characterized in that, when the flat tube including the side gusset is formed, ribs are provided on both side edges of the four-layered structure to provide ribs. A method for manufacturing a flat bag with pleats according to claim 2.
[0011]
The invention described in [Claim 4] is characterized in that the packaging material is fed out from the original roll of packaging material, the inner surfaces are heat-sealed in the shape of a palm, and the pleats extending in the width direction of the packaging material are tilted upstream. Next, the packaging material with pleats is hung on a former and folded into a cylindrical shape to connect and seal the edges of the packaging material into flat cylinders, then upstream from each crease Secure the same size as the side gusset in the side and apply the bottom heat seal to the upstream side, then cut the upstream side of each bottom heat seal to separate it as a flat bag with a pleated top opening. It is a manufacturing method of the flat bag with a pleat characterized by the above-mentioned.
[0012]
The invention described in [Claim 5] is characterized in that the packaging material is fed out from the original roll of the packaging material, the inner surfaces are heat-sealed in a palm-like shape, and the pleats extending in the width direction of the packaging material are tilted upstream. Then, the packaging material with pleats is hung on the former, folded into a cylinder shape, the edges of the packaging material are connected and sealed into flat cylinders, and then downstream of each crease A flat bag with pleats characterized in that a top heat seal is applied at a position apart from the height of the bag to the side, and then the downstream side of each top heat seal is cut and separated as a flat bag with a fold at the lower end opening type. It is a manufacturing method.
[0013]
The invention described in [Claim 6] is that the packaging material is fed out from the original roll of packaging material, the inner surfaces are heat-sealed in a palm-like shape, and the pleats extending in the width direction of the packaging material are collapsed to the required dimensions. Then, the packaging material with pleats is cut in the longitudinal direction so that the width is halved, and the packaging materials with two creases are faced to each other with the inner surfaces facing each other. Laminate them so that they correspond to each other, and fold a pair of side wrappings in half on both sides between the two wrappings so that they form side gussets, and then rib them on both sides of the four laps A flat tube is formed as a rib by applying heat seal, and then the bottom gusset is secured to the upstream side of each fold and the bottom gusset is secured to the upstream side, and then the bottom heat seal is applied to the upstream side. Cut the upstream side A method for producing a pleated flat bag, characterized in that disconnecting a pleated flat bag top opening type.
[0014]
[7] The invention described in [Claim 7] is that the packaging material is fed out from the original roll of packaging material, the inner surfaces are heat-sealed in a palm-like shape, and the pleats extending in the width direction of the packaging material are collapsed to the required dimensions. Then, the packaging material with pleats is cut in the longitudinal direction so that the width is halved, and the packaging materials with two creases are faced to each other with the inner surfaces facing each other. Laminate them so that they correspond to each other, and fold a pair of side wrappings in half on both sides between the two wrappings so that they form side gussets, and then rib them on both sides of the four laps A flat tube is formed as a rib by heat sealing, then top heat sealing is performed at a position away from the height of the bag to the downstream side of each fold, and then the downstream side of each top heat sealing is cut to the bottom. Cut as an open type flat bag with folds A method for producing a pleated flat bag, characterized in that release.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the invention of claim 1 in which the flat bag with folds shown in FIG. 1 (h) is described as a single bag and the flat bag with folds can be continuously mass-produced. The manufacturing method of the flat bag with a crease | fold concerning this shall be demonstrated with reference to FIG. 2 thru | or FIG.
Fig.1 (a) is a perspective view of the packaging material which formed the pleat. FIG.1 (b) is a perspective view which shows the state made into the flat cylinder with a pleat. FIG.1 (c) is a perspective view which shows the state opened to the square cylinder shape. FIG.1 (d) is a perspective view which shows the state which inserts a side gusset. FIG.1 (e) is a perspective view which shows the state made into the flat cylinder containing a side gusset. FIG.1 (f) is a perspective view which shows the state which attached the rib to the both sides of the flat cylinder containing a side gusset. FIG.1 (g) is gg sectional drawing in FIG.1 (f). FIG. 1 (h) is a perspective view of a flat bag with folds. FIG. 1 (i) is a perspective view showing a state in which the flat bag with folds is three-dimensionally opened. FIG. 1 (j) is a perspective view showing a state in which the packaged goods are accommodated and the openings are closed.
This flat bag P1 with pleats is substantially the same as a flat cylindrical shape without a strong fold (hem) as shown in FIG. 1 (b), as shown in FIG. 1 (b). Wrapping and butting both ends of the packaging material F in the center of the width of the rear surface portion 3 without gaps, and arranging the three-layer connecting tape T made of double-sided sealant film on the inside thereof, the both edges of the packaging material F are The connecting tape T is heat-sealed to form a flat tube without hem, then opened in a square tube shape as shown in FIG. 1 (c), and the right side surface portion 4 and the left side surface portion 5 as shown in FIG. 1 (d). Is folded inward to form a pair of side gussets sandwiched between the front surface portion 2 and the rear surface portion 3, and as shown in FIG. 1 (e), a flat tube with hems and side gussets is formed. As shown in FIGS. 1 (f) and 1 (g), four ribs 6a, 6b, 6c, 6d are formed by ribbing heat sealing on both side edges of the four layers. Provided, then it is subjected to bottom heat seal 7 at the lower end as shown in FIG. 1 (h), the upper end is in the bag opening.
When this three-dimensional flat bag P1 is opened three-dimensionally, as shown in FIG. 1 (i), a triangular pocket-shaped bottom gusset 8 is placed on both sides of the lower portion of the fold 1, and the bottom surface is developed. A portion 9 is formed, the fold 1 hangs down from the periphery of the bottom surface portion 9, and the fold 1 is coplanar with the front surface portion 2, the right side surface portion 4, the left side surface portion 5, and the rear surface portion 3 and exhibits an independent appearance. Since there is no tight packaging form, the fold 1 hides the bottom surface portion 9 and becomes a stable self-supporting square bottom bag.
As shown in FIG. 1 (j), the packaged product is filled, and a top ridge type upper surface portion 11 containing the top gusset 10 is formed and a top heat seal 12 is applied. In addition, it is not limited to putting the top gusset 10.
[0016]
FIG. 2 shows a schematic overall plan view of a bag making apparatus for carrying out the manufacturing method of a flat bag with folds capable of mass-producing the flat bag P1 with folds shown in FIG.
3 to 6 show schematic perspective views of the respective parts of the bag making apparatus divided into four parts.
The bag making apparatus shown in FIGS. 2 to 6 will be described with reference to the reference numerals.
Reference numeral R denotes a raw roll of packaging material. Reference numeral 13 denotes a packaging material supply roll, which is driven to increase and decrease speed by a servo motor (not shown) and cooperates with a rotatable nip roll 14 to supply the packaging material F from the original roll R.
Reference numeral 15 denotes an accumulator, which has two step rolls 15a and 15b integrally connected to the packaging material F fed out by the packaging material feeding roll 13, and passes through the packaging material F so as to meander up and down when viewed from the side. Thus, it serves to keep the feeding resistance with respect to the drawing of the packaging material F on the downstream side light and constant. The packaging material feed roll 13 reduces the amount of film feed when the step rolls 15a and 15b are lowered to the lower limit position, and increases the film feed amount when the step rolls 15a and 15b are raised to the upper limit position.
Reference numeral 16 denotes a crease applicator, which corresponds to the upstream and downstream slit forming plates 16a and 16b that are in close contact with the lower surface (outer surface) of the packaging material F, and the lower side corresponding to the lower sides of the slit forming plates 16a and 16b. Heat sealers 16c, 16d, packaging material pressing plates 16e, 16f provided corresponding to the upper side of the slit forming plates 16a, 16b and pressing the upper surface of the packaging material F against the slit forming plates 16a, 16b, and the slit forming plate 16a , 16b is provided on the upper side of the packaging material F so as to correspond to the slits 16b, and is provided with a fold folding plate 16g that descends into the slits and performs fold folding.
The formation of the fold 1 is performed when the packaging material F stops traveling. First, the packaging material pressing plate 16f is lowered to press the packaging material F against the slit forming plate 16b, and then the fold folding plate 16g is lowered to push the packaging material F between the slits of the slit forming plates 16a and 16b to fold. Next, the packaging material presser plate 16e is lowered, the packaging material F is pressed against the slit forming plate 16a, the fold folding plate 16g is raised and returned, and then the crease heat sealers 16c and 16d are closed to close the packaging material F. Heat-sealing is applied to the fold folding palms to form the fold 1, and then the fold-attaching heat sealers 16c and 16d are opened and the wrapping material pressing plates 16e and 16f are raised and returned so that the wrapping material F can travel. To do.
Reference numeral 17 denotes a fold-down plate, which is provided in a pair of upper and lower sides so as to have a gap of, for example, 1.5 mm to 3.0 mm, and allows the wrapping material F to travel and folds the fold 1 upstream. .
Reference numeral 18 is a former, reference numerals 19a and 19b are bending guides, reference numerals 20a and 20b are film guiding rollers, reference numeral 21 is a bar-type back-sealed heat sealer, and reference numerals 22a and 22b are free-rotating side gusset folding rolls. Reference numeral 23 denotes a packaging material drawing roll, which is provided in a pair of upper and lower sides and is pulled in the downstream direction so as to be intermittently fed with the same pitch as the pleat arrangement pitch with the flat tube portion containing the side gusset interposed therebetween. Reference numerals 24a and 24b are heat sealers for ribbing. Reference numeral 25 denotes a bottom heat sealer, which is provided in a pair of upper and lower sides and performs a bottom heat seal across a flat tube portion containing side gussets. Reference numeral 26 denotes a packaging material drawing roll, which is provided in a pair of upper and lower sides and is pulled in synchronism with the packaging material drawing roll 23 so as to be intermittently fed with the same pitch as the pleat arrangement pitch across the flat tube portion with side gussets. It is like that. Reference numeral 27 denotes a cutter. In FIG. 4, the symbol W is a raw roll of connecting tape. The connecting tape T fed out from the raw roll W is stretched so as to be stretched from the inner side of the packaging material F which is joined together without gaps on the former 18.
[0017]
The manufacturing method of the flat bag with a pleat is demonstrated.
The packaging material feeding roll 13 feeds the packaging material F from the packaging material roll R, and the packaging material drawing rolls 23 and 26 are dimensions for forming the bag height dimension and the bottom surface from the crease to the bottom heat seal (preferably Is intermittently fed so as to have a length equal to the total dimension of the dimensions required for bottom heat sealing and the side gusset folding dimension). Every time the wrapping device 16 intermittently stops the wrapping material F, the inner surfaces of the wrapping material F are heat-sealed in a palm shape to form the fold 1. The pitch at which the folds 1 are formed is equal to the sum of the bag height dimension, the dimension for forming the bottom surface from the fold to the bottom heat seal, and the dimension required for the bottom heat seal. Next, the fold-down plate 17 folds the fold 1 passing therethrough upstream.
Next, wrapping material F with folds 1 Fold up into a flat cylinder by the former 18, The end edges of the packaging material F are heat-sealed to each other through the connection tape T by the bar-shaped back-sealed heat sealer 21. In the section from AA to BB in FIG. 2 (a), as shown in FIG. 2 (b), the former 18 has a horizontally long thick plate cross-sectional shape, and the packaging material F has a flat cylindrical shape as shown in FIG. 1 (b). become. In the section from C-C to DD in FIG. 2A, the former 18 has a square tube shape shown in FIG. In EE in FIG. 2 (a), the former 18 has a cross-sectional shape with “H” being horizontal, the size between the upper and lower surfaces is reduced, and side gusset folding rolls 22a and 22b that are freely rotatable on both sides are inserted into FIG. Side gussets are inserted as shown in d). In FF in FIG. 2 (a), the packaging material drawing roll 23 folds it up into a flat tube with side gussets as shown in FIG. 1 (f).
Subsequently, in GG in FIG. 2 (a), rib-sealing heat sealers 24a and 24b are used to apply ribbing heat-seal to both side edges of the four-layer stack as shown in FIGS. 1 (f) and 1 (g). Four ribs 6a, 6b, 6c, 6d are provided. In HH in FIG. 2 (a), the bottom heat sealer 25 performs the bottom heat seal 7 as shown in FIG. 1 (h).
The position of the bottom heat seal 7 is the upstream side of the side gusset that is secured to the upstream side of the second fold, counting from the side of the cutter 27, so that the upstream side of the folds is upstream. The side gusset is secured to the side with a dimension substantially the same as that of the side gusset, and a bottom heat seal is applied to the upstream side.
2 (a), the upstream side of the bottom heat seal 7 is cut by the cutter 27, and the top opening type flat bag P1 with pleats shown in FIG. 1 (h) is cut off. Is completed.
[0018]
FIG. 7 (a) is a perspective view of a flat bag P2 with folds containing ribbed side gussets. FIG. 7B is a perspective view showing a state in which the flat bag P2 with pleats is opened three-dimensionally. FIG.7 (c) is CC sectional drawing in FIG.7 (b).
The bag making method capable of continuously mass-producing the flat bag with pleats P2 of the upper end opening type shown in FIG. 7 also relates to the embodiment of the method for manufacturing the flat bag with pleats of the inventions of claims 1 and 3. It is.
This flat bag P2 with pleats is such that both corners of the lower part from the crease 1 are approximately 45 degrees as shown in FIG. 7 (a) by exchanging the bottom heat sealer 25 and the cutter 27 in FIG. 2 (a). A flat bag P2 with folds containing ribbed side gussets that has been heat-sealed and cut into triangles can be made and mass-produced. Note that the cut of about 45 degrees may be trimming performed as post-processing. When this flat bag P2 with pleats is opened three-dimensionally as shown in FIG. 7 (b), a triangular pocket is not formed on the bottom surface.
[0019]
FIG. 8 (a) is a perspective view of a flat bag P3 with pleats containing side gussets without ribs. FIG. 8B is a perspective view showing a state in which the flat bag P3 with pleats is opened three-dimensionally.
The manufacturing method capable of continuously mass-producing the flat bag with pleats P3 of the upper end opening type shown in FIG. 8 also relates to the embodiment of the method for manufacturing the flat bag with pleats of the inventions of claims 1 and 3. is there.
When the flat bag P3 with pleats is not provided with ribs in FIG. 2 (a) when the rib-sealing heat sealers 24a and 24b are left open so as not to function, as shown in FIG. The pleated flat bag P3 with side gusset can be made and mass-produced. As a modified example, by replacing the bottom heat sealer 25 and the cutter 27, both corners of the lower part from the fold 1 are heat-sealed to about 45 degrees in the same manner as the flat bag P2 with the fold shown in FIG. Moreover, flat bags with folds cut into triangles can be made and mass-produced.
[0020]
FIG. 9 is a perspective view of a flat bag with pleats P4 with side gussets with ribs of the lower end opening type. FIG. 10 is a perspective view of a flat bag P5 with pleats containing side gussets without ribs of the lower end opening type.
The bag making method for continuously mass-producing the flat bag P4 or P5 with folds of the lower end opening type shown in FIGS. 9 and 10 is the implementation of the manufacturing method of the flat bag with folds according to claims 2 and 3. It depends on the form.
In FIG. 2 (a), if the position of the bottom heat sealer 25 is moved slightly upstream, it can function as a top heat sealer, a top heat seal can be applied, and then intermittent feed is performed to intermittently stop. When the downstream side of the top heat seal is cut by the cutter 27, as shown in FIG. 9, the flattened flat bag P4 with ribbed side gusset of the lower end opening type can be produced and mass-produced. When ribs are not provided so that the ribbed heat sealers 24a and 24b are left open and not functioning, as shown in FIG. 10, a flat bag P5 with pleats with ribbed side gussets of the lower end opening type is provided. Can be made and mass-produced.
[0021]
The closing of the both horizontal edges of the packaging material may be a palm-type heat seal, or a so-called envelope-sealed seal in which the inner surface of the other edge is in close contact with the outer surface of one edge. There may be. In this case, the outer portion of the double edge of the fold 1 that overlaps the inner side is cut into a required shape, and the inner portion of the double edge of the fold 1 that overlaps the outer side is cut into a required shape and overlapped. When heat sealing is performed, the folds 1 on both sides of the closed portion become a single sheet. Further, the closing position of the both end edges in the horizontal direction of the packaging material may be not the center of the rear surface portion but, for example, the vicinity of the ridge between the right side surface and the rear surface portion. These modifications can be realized by slightly changing the bag making apparatus shown in FIG.
[0022]
Subsequently, the process of making a bag with the pleated flat bag P6 shown in FIG. 11 (c) as a single bag will be described, and then the pleated flat bag can be continuously mass-produced. The manufacturing method of the flat bag with a fold concerning embodiment shall be demonstrated with reference to FIG.
FIG. 11 (a) is a perspective view of a wrapping material with pleats. FIG. 11 (b) is a perspective view showing a flat cylinder. FIG.11 (c) is a perspective view of the flat bag with a pleat of an upper end opening type. FIG. 11 (d) is a perspective view showing a state in which the upper part of the flat bag with folds is opened. FIG. 11 (e) is a perspective view showing a state in which the articles to be packaged are accommodated and the openings are closed.
The flat bag P6 with folds is formed by wrapping the packaging material F formed with the folds 1 as shown in FIG. 11 (a) into a flat cylindrical shape as shown in FIG. 11 (b). At the center, both edges of the packaging material F are abutted without gaps, and a three-layer connecting tape T made of a double-sided sealant film is arranged on the inside so that both ends of the packaging material F are heat sealed to the connecting tape T. Then, after forming a flat tube, a bottom heat seal 7 is applied to the lower end as shown in FIG. 11 (c), and the upper end is a bag opening. The distance from the pleat 1 to the bottom heat seal 7 is not particularly limited. When the size is small, the thickness of the bag is small.
For packaging, as shown in FIG. 11 (d), the upper portion of the flat bag with folds is opened and filled with a packaged product, and a top heat seal 12 is applied as shown in FIG. 11 (e). When the bag is filled with the article to be packaged, the lower portion of the fold 1 is flattened. As shown in FIG. 11 (e), when both end portions of the bottom heat seal 7 are folded inward as triangular ears that are parallel to each other, both ears are folded into the bottom surface portion 9 and are hidden inside the fold 1. The fold 1 constitutes a surface extending from the peripheral surface portion, and is substantially perpendicular to the bottom surface portion 9 from the upper end of the fold back surface and hides the bottom surface portion.
As shown in FIG. 11 (e), the packaged product is filled, and a top ridge type upper surface portion 11 containing the top gusset 10 is formed and a top heat seal 12 is applied. In addition, it is not limited to putting the top gusset 10.
This flat bag with pleats has a tight packaging shape because the folds 1 hang from the periphery of the bottom surface portion 9 and the folds 1 are flush with the peripheral surface portion and do not exhibit an independent appearance. Becomes a stable self-supporting square bottom bag by concealing the bottom surface portion 9.
The package of the flat bag with pleats has substantially the same appearance as a so-called square-bottom pillow wrapping body, the folds 1 hang from the periphery of the bottom surface portion 9 and the folds 1 are flush with the peripheral surface. Since it does not exhibit an independent appearance, it feels a tight packaging form, and the fold 1 hides the bottom surface portion 9 and becomes a stable self-supporting square bottom bag.
[0023]
FIG. 12 is related to an embodiment of a manufacturing method of a flat bag with pleats according to the invention of claim 4.
FIG. 12 shows a schematic overall plan view of a bag making apparatus for carrying out the manufacturing method of the flat bag with pleats capable of mass-producing the flat bag with pleats P6 shown in FIG. 11 (c).
The difference between the bag making apparatus shown in FIG. 12 and the bag making apparatus shown in FIG. 2 is the difference between a structure in which a side gusset can be inserted and a structure in which the side gusset is not.
Specifically, in the bag making apparatus shown in FIG. 12, there are no mechanical elements corresponding to the side gusset folding rolls 22a and 22b and the rib-sealing heat sealers 24a and 24b in the bag making apparatus shown in FIG.
Further, in the bag making apparatus shown in FIG. 12, the former 18a is made of a plate having a square shape on the downstream side and a trapezoidal shape on the upstream side. The shape is different from the former 18 of the bag making apparatus shown in FIG.
The arrangement pitch of the folds 1 is a total dimension of the bag height dimension in the packaging material transfer direction, the dimension for forming the bottom surface from the fold to the bottom heat seal, and the dimension necessary for the bottom heat seal. It is the same as the case of the bag making apparatus shown in FIG.
A wrapping material F with pleats 1 is hung on a former 18a, and is wound around in a flat cylindrical shape without a strong fold (hem) as shown in FIG. The edges of the packaging material F are heat-sealed to each other through a tape T to form a flat tube without hem, and the bottom heat sealer 25 is used to apply the bottom heat seal 7 to the lower end, and then the upstream side of each bottom heat seal Is cut and separated as a flat bag with a pleat of the upper end opening type, a flat bag P6 with a pleat of the upper end opening type shown in FIG. 11 (c) can be manufactured.
[0024]
FIG. 13 (a) is a perspective view of a flat bag P7 with folds without ribbed side gussets of the lower end opening type. FIG. 13 (b) is a perspective view showing a state in which the lower part of the flat bag P7 with folds is opened and three-dimensionally opened. FIG. 13 (c) is a perspective view of a package body in which a packaged product is accommodated in a flat bag P7 with folds and the opening is closed.
The bag making method capable of continuously mass-producing the flat bag with pleats P7 of the lower end opening type shown in FIG. 13 (a) is also according to the embodiment of the method for producing the flat bag with pleats of the invention of claim 5. It is.
In FIG. 12, when the position of the bottom heat sealer 25 is slightly moved to the upstream side, it can function as a top heat sealer, top heat seal can be applied, and then intermittent feed is performed to intermittently stop the top heat. When the downstream side of the seal is cut by the cutter 27, as shown in FIG. 13 (a), a flattened flat bag P7 with a ribbed side gusset of the lower end opening type can be produced and mass-produced.
[0025]
Subsequently, after explaining the process of making a bag with the pleated flat bag P8 shown in FIG. 14 (a) as a single bag, the pleated flat bag can be continuously mass-produced. The manufacturing method of the flat bag with a fold concerning embodiment shall be demonstrated with reference to FIG.
FIG. 14A shows a perspective view of the flat bag P8 with folds, and FIG. 14B shows a perspective view when the flat bag with folds is opened three-dimensionally. FIG. 14 (c) is a horizontal sectional view of the flat bag with pleats that is three-dimensionally opened. FIG.14 (d) is a perspective view which shows the decomposition | disassembly and arrangement | positioning state of each packaging material which comprises the flat bag with a pleat. FIG. 14 (e) is a perspective view showing a flat cylinder with side gussets.
The flat bag P8 with pleats overlaps the wrapping materials 2 and 3 on which the pleats 1 are formed as shown in FIG. 14 (d), and becomes side gussets (= side portions) between the wrapping materials 2 and 3. After sandwiching the creaseless wrapping materials 4 and 5, the edge of the four-layer wrapping material is ribbed and heat-sealed to form a flat tube with side gusseted ribs as shown in FIG. As shown in FIG. 14 (c), a bottom heat seal 7 is applied to the lower end, and the upper end is a bag opening. The distance from the fold 1 to the bottom heat seal 7 is approximately the same as the folding dimension of the side gusset.
For packaging, the upper part of the flat bag with folds is opened as shown in FIG. The pleats 1 are provided at the lower end of the front part and the lower part of the rear part of the bag so as to hide the bottom heat seal 7 when viewed from the front-rear direction. The difference between the flat bag P8 with folds shown in FIG. 14 (a) and the flat bag P1 with folds shown in FIG. 1 (h) can be seen by comparing with FIG. 14 (b) and FIG. 1 (i). The difference is whether the fold 1 is provided at the lower end of the front surface portion and the lower end of the rear surface portion, or provided at the lower ends of the four sides of the bottom surface portion. The fold 1 is substantially perpendicular to the bottom surface portion 9 from the upper end of the fold back surface and hides the bottom surface portion.
In this flat bag with pleats, since the crease 1 is coplanar with the front part 2 and the rear part 3 and does not exhibit an independent appearance, the crease 1 feels a tight packaging form, and the crease 1 hides the bottom part 9 and is stable and independent. It becomes a sex square bottom bag.
[0026]
FIG. 15 is related to an embodiment of a manufacturing method of a flat bag with pleats of the invention of claim 6.
FIG. 15 is a schematic perspective view of a main part of a bag making apparatus for carrying out the manufacturing method of the flat bag with pleats capable of mass-producing the flat bag with pleats P8 shown in FIG. 14 (a).
FIG. 15 does not show a part from the packaging material roll out of the packaging material until the crease 1 is formed on the packaging material F, and the downstream side of the rib-sealing heat sealers 24a, 24b. Not shown. 2 and FIG. 3 are the same as those until formation of the folds, and the portions downstream of the rib-sealing heat sealers 24a and 24b are the same as those in FIG. 5 and FIG.
Therefore, as shown in FIGS. 2 and 3, the manufacturing method of the flat bag with pleats is such that the packaging material is fed out from the original roll of packaging material, the inner surfaces are heat-sealed in a palm-like shape, and the packaging is laid down on the upstream side. As for the folds extending in the width direction of the material, the arrangement pitch of the folds is the height of the bag in the packaging material transfer direction, the size for forming the bottom surface from the fold to the bottom heat seal, and the size required for the bottom heat seal. It forms so that it may become a space | interval equal to the sum total dimension.
Next, as shown in FIG. 15, the packaging material F on which the folds 1 are formed travels in the vertical plane, is hung on the guide roll 28, and is then hung on the M plate 29. 30 b, 30 c, 30 d is divided into upper and lower parts, and the packaging material 2 (corresponding to the packaging material 2 in FIG. 14 (d)) is run in the horizontal plane, and the packaging material 3 (FIG. ) In a horizontal plane, and a pair of mating rolls 33 overlap the packaging materials 2 and 3 with two folds 1 so that the inner surfaces face each other and the folds correspond to each other. At the same time, corresponding to the space between the two packaging materials 2 and 3 separated vertically, the side packaging materials 4 and 5 are unwound from the raw rolls R2 and R3 and hung on the triangular plate formers 32a and 32b. A pair of mating rolls 33 are folded so that side gussets are formed. It is sandwiched between the wrapping materials 2 and 3 with rollers, and then the edges of the four-layered wrapping materials 2, 3 and 4 and the four-layered wrapping edges of the wrapping materials 2, 3 and 5 are ribbed. A flat tube is formed as a rib by sandwiching and heat-sealing with heat sealers 24a and 24b.
Next, as shown in FIG. 5 and FIG. 6, the side gusset is secured to the upstream side of each fold, and the bottom heat seal is applied to the upstream side, and then the upstream side of each bottom heat seal. Cut the top and separate it into a flat bag with a pleated top opening.
[0027]
FIG. 16 is a perspective view of a flat bag P9 with pleats. The bag making method capable of mass-producing the flat bag with pleats P9 of the lower end opening type shown in FIG. 16 is according to the embodiment of the method for producing a flat bag with pleats of the invention of claim 7.
In FIG. 15, if the position of the bottom heat sealer 25 is slightly moved to the upstream side, it can function as a top heat sealer, a top heat seal can be applied, and then intermittent feed is performed to intermittently stop the top heat. When the downstream side of the seal is cut by the cutter 27, as shown in FIG. 16, a flattened flat bag P9 with ribbed side gussets of the lower end opening type can be produced and mass-produced.
[0028]
The packaging material F for manufacturing a flat bag with a pleat is made of, for example, the following laminated film.
(1) OPP 20μm / Adhesive / LLDPE 20μm ・・・・ (Outer layer / Inner layer: Sealant)
(2) OPP 20μm / adhesive / uniaxially stretched or biaxially stretched HDPE / adhesive / LLDPE (... outer layer / intermediate layer / inner layer: sealant)
(3) OPP 20μm / adhesive / aluminum foil / adhesive / LLDPE 20μm ... (outer layer / intermediate layer / inner layer: sealant)
(4) OPP (silica or alumina deposition layer) / adhesive / uniaxially or biaxially stretched HDPE / adhesive / LLDPE 20 μm (outer layer / intermediate layer / inner layer: sealant)
(5) PET 20 μm / adhesive / aluminum foil / adhesive / OPP 20 μm / adhesive / LLDPE 20 μm (outer layer / intermediate layer / intermediate layer / intermediate layer / inner layer: sealant)
(6) With paper / adhesive LLDPE 50μm ・・・・ (Outer layer / Inner layer: Sealant)
(7) PET 12μm / adhesive / LLDPE 20μm ・・・・ (Outer layer / Inner layer: Sealant)
(8) AL 19μm / Adhesive / LLDPE 70μm ... (Outer layer / Inner layer: Sealant)
(9) PET / SiOx 12μm / Adhesive / LLDPE 100μm ・・・・ (Outer layer / Inner layer: Sealant)
(10) CPP 5μm ・ OPP 30μm co-extrusion / adhesive / CPP 20μm ・・・・ (Outer layer / Inner layer; Inner and outer surface sealant)
In order to form the pleat 1 by heat sealing, the structure of the packaging material F has a sealant film on the inner surface as can be seen from the illustration of the laminated film. In addition, the packaging material F may be comprised from the sealant film single-piece | unit.
[0029]
The manufacturing method of the flat bag with a crease of the present invention includes a case where the crease is provided not only at the lower end of the bag but also at the middle stage and the upper end.
[0030]
【The invention's effect】
As described above, the method for manufacturing a flat bag with pleats according to the present invention forms a fold formed by unwinding the original fabric and folding it back to form a three-layer belt and bonding the inner surfaces of the folded portions. The flat bag with pleats in which the packaging material having pleats is provided at least at the lower end of the front face part and the rear face part or the lower end of the peripheral face part to hide the bottom face part can be mass-produced.
The method for manufacturing a flat bag with pleats according to the present invention produces a fold after forming the folds when the packaging material is flat. Is located at the extended edges of the front and rear surfaces, and does not exhibit an independent appearance as folds, but forms a flat surface with the front, rear, or peripheral surface parts, making it feel tight packaging and excellent aesthetics as packaging In addition, a flat bag with folds suitable for a liquid container can be manufactured because the fold portion is completely sealed.
[Brief description of the drawings]
FIG. 1 is a manufacturing process diagram of a flat bag with folds manufactured by the method for manufacturing a flat bag with folds according to the invention of claim 1 as a single bag;
Fig.1 (a) is a perspective view of the packaging material which formed the pleat. FIG.1 (b) is a perspective view which shows the state made into the flat cylinder with a pleat. FIG.1 (c) is a perspective view which shows the state opened to the square cylinder shape. Fig. 1 (d) shows a state where side gussets are inserted. Cross section It is. Fig. 1 (e) shows a flat tube with side gussets. Perspective view It is. FIG.1 (f) is a perspective view which shows the state which attached the rib to the both sides of the flat cylinder containing a side gusset. FIG.1 (g) is gg sectional drawing in FIG.1 (f). FIG. 1 (h) is a perspective view of a flat bag with a pleat of the upper end opening type. FIG. 1 (i) is a perspective view showing a state in which the flat bag with folds is three-dimensionally opened. FIG. 1 (j) is a perspective view showing a state in which the packaged goods are accommodated and the openings are closed.
2 shows a manufacturing method of a flat bag with folds according to the invention of claim 1, and FIG. 2 (a) is a schematic overall plan view of a bag making apparatus capable of mass-producing the flat bag with folds shown in FIG. FIG. FIG. 2B is a cross-sectional view taken along the line AA in FIG. FIG.2 (c) is CC sectional drawing in Fig.2 (a). FIG.2 (d) is EE sectional drawing in Fig.2 (a).
FIG. 3 is a perspective view of the uppermost stream side portion obtained by dividing the bag making apparatus shown in FIG. 2 into four parts.
4 is a perspective view of a portion adjacent to the downstream side of the portion shown in FIG. 3;
5 is a perspective view of a portion adjacent to the downstream side of the portion shown in FIG.
6 is a perspective view of a portion adjacent to the downstream side of the portion shown in FIG.
FIG. 7 shows a flat bag with pleats produced by the method for producing a flat bag with pleats according to the first and third aspects of the invention, and FIG. 7 (a) shows a pleat with ribbed side gussets of the upper end opening type. It is a perspective view of a flat bag. FIG.7 (b) is a perspective view which shows the state which opened the flat bag with a pleat in three dimensions. FIG.7 (c) is CC sectional drawing in FIG.7 (b).
FIG. 8 shows a flat bag with a pleat of the upper end opening type manufactured by the manufacturing method of a flat bag with a pleat according to the first and third aspects of the present invention, and FIG. It is a perspective view of a flat bag. FIG. 8B is a perspective view showing a state in which the flat bag with folds is three-dimensionally opened.
FIG. 9 is a perspective view of a flat bag with folds that is manufactured by the method for manufacturing a flat bag with pleats according to the first and third aspects of the present invention, and is a flat bag with folds that includes a side gusset with ribs of a lower end opening type. is there.
FIG. 10 is a perspective view of a flat bag with folds manufactured by the method for manufacturing a flat bag with pleats according to the first and third aspects of the invention, and a flat bag with pleats with side gussets without ribs of the lower end opening type; is there.
FIG. 11 is a manufacturing process diagram as a single bag of a flat bag with folds of the upper end opening type manufactured by the manufacturing method of a flat bag with pleats according to an embodiment of the invention of claim 4;
FIG. 11 (a) is a perspective view of a wrapping material with pleats. It is a perspective view which shows the state made into the flat cylinder in FIG.11 (b). FIG.11 (c) is a perspective view of the flat bag with a pleat of an upper end opening type. FIG. 11 (d) is a perspective view showing a state in which the upper part of the pleated flat bag is opened. FIG. 11 (e) is a perspective view showing a state in which the articles to be packaged are accommodated and the openings are closed.
FIG. 12 shows a flat bag with folds produced by the method for producing a flat bag with folds according to the invention of claim 4, and the production of flat bags with folds capable of mass-producing the flat bags with folds shown in FIG. 11 (c). 1 shows a schematic overall plan view of a bag making apparatus for carrying out the method.
FIG. 13 shows a flat bag with folds of the lower end opening type manufactured by the method for manufacturing a flat bag with folds according to the invention of claim 5. FIG. 13 (a) is a perspective view of a flat bag with pleats without ribbed side gussets of the lower end opening type. FIG. 13 (b) is a perspective view showing a state in which the lower part of the flat bag with folds is opened and three-dimensionally opened. FIG. 13 (c) is a perspective view of a package body in which a packaged product is accommodated in a flat bag with folds and the opening is closed.
FIG. 14 is a manufacturing process diagram as a single bag of a flat bag with folds manufactured by the method for manufacturing a flat bag with folds according to an embodiment of the invention of claim 6;
FIG. 14A shows a perspective view of a flat bag with pleats of the upper end opening type, and FIG. 14B shows a perspective view when the flat bag with pleats is opened three-dimensionally. FIG.14 (c) is CC sectional drawing in FIG.14 (b). FIG.14 (d) is a perspective view which shows the decomposition | disassembly and arrangement | positioning state of each packaging material which comprises the flat bag with a pleat. FIG. 14 (e) is a perspective view showing a flat cylinder with side gussets.
15 shows a flat bag with folds produced by the method for producing a flat bag with pleats according to the invention of claim 6, and the production of flat bags with folds capable of mass-producing the flat bags with folds shown in FIG. 14 (a). 1 shows a schematic overall plan view of a bag making apparatus for carrying out the method.
FIG. 16 shows a flat bag with a fold of the lower end opening type manufactured by the manufacturing method of a flat bag with a fold according to the invention of claim 7.
[Explanation of symbols]
F ... Wrapping material, 1 ... Fold, 2 ... Front part, 3 ... Rear face part, 4 ... Right side part, 5 ... Left side part, T ... Connection tape, 6a, 6b, 6c, 6d ... ribs, 7 ... bottom heat seal, 8 ... bottom gusset, 9 ... bottom face, 10 ... top gusset, 11 ... top face, 12 ... Top heat seal, 13 ... packaging material feed roll, 14 ... nip roll, R ... raw fabric roll, 15 ... accumulator, 15a, 15b ... step roll, 16 ... pleating device, 16a, 16b ... slit forming plate, 16c, 16d ... heat sealer for attaching folds, 16e, 16f ... packaging material pressing plate, 16g ... fold folding plate, 17 ... fold-down plate, 18 , 18a ... Former, 19a, 19b ... Bending Guy 20a, 20b ... Roll for guiding film, 21 ... Bar-type back-sealed heat sealer, 22a, 22b ... Side gusset folding roll, 23 ... Packaging material drawing roll, 24a, 24b ... Rib Attaching heat sealer, 25 ... bottom heat sealer, 26 ... packaging material drawing roll, 27 ... cutter, 28 ... guide roll, 29 ... M plate, 30a, 30b, 30c, 30d ..Guide roll, 31 ... Cutter, 32a, 32b ... Triangle plate former, 33 ... Aligning roll, R2, R3 ... Original roll,

Claims

The wrapping material is fed out from the raw material roll of the wrapping material, the inner surfaces are heat-sealed in a palm-like shape, and the folds extending in the width direction of the wrapping material are formed so as to have an arrangement pitch of the required dimensions, Hang the wrapping material on the former and fold it into a cylinder to connect and seal the edges of the wrapping material, and put side gussets on both sides to make a flat cylinder, and then to the upstream side of each fold It is characterized by securing the same size as the gusset folding size and applying a bottom heat seal on the upstream side, then cutting the upstream side of each bottom heat seal and separating it as a flat bag with a pleated top opening type. The manufacturing method of the flat bag with a crease.

The wrapping material is fed out from the raw material roll of the wrapping material, the inner surfaces are heat-sealed in a palm-like shape, and the folds extending in the width direction of the wrapping material are formed so as to have an arrangement pitch of the required dimensions, Hang the wrapping wrapping material on the former, fold it into a cylinder, seal the connection between the edges of the wrapping material, insert side gussets on both sides to make a flat tube, and then move the bag downstream from each fold. A method for producing a flat bag with pleats, characterized in that a top heat seal is applied at a position apart from the height dimension, and then the downstream side of each top heat seal is cut and cut off as a flat bag with folds of a lower end opening type.

3. The production of a flat bag with pleats according to claim 1 or 2, wherein after forming the flat tube containing the side gusset, ribs are provided on both side edges of the four-ply stack to provide ribs. Method.

The wrapping material is fed out from the raw material roll of the wrapping material, the inner surfaces are heat-sealed in a palm-like shape, and the folds extending in the width direction of the wrapping material are formed so as to have an arrangement pitch of the required dimensions, Hang the packaging material with folds on the former, fold it into a cylinder, seal the connecting edges of the packaging material into a flat cylinder, and then secure the dimensions that can form the bottom surface upstream from each fold It was subjected to bottom-heat sealing, and then features and method of manufacturing to Ruhi da with flat bag to be separated as a pleated flat bag of the top opening type by cutting the time of the upstream side of each bottom heat seal.

The wrapping material is fed out from the raw material roll of the wrapping material, the inner surfaces are heat-sealed in a palm-like shape, and the folds extending in the width direction of the wrapping material are formed so as to have an arrangement pitch of the required dimensions, Hang the wrapping wrapping material on the former, fold it into a cylinder, connect and seal the edges of the wrapping material into a flat tube, and then at the position away from the height of the bag downstream from each fold A method for producing a flat bag with pleats, characterized in that top heat sealing is performed, and then the downstream side of each top heat seal is cut and separated as a flat bag with folds of a lower end opening type.

The wrapping material is fed out from the raw material roll of the wrapping material, the inner surfaces are heat-sealed in a palm-like shape, and the folds extending in the width direction of the wrapping material are formed so as to have an arrangement pitch of the required dimensions, Cut the wrapping material with folds in the vertical direction so that the width is halved, and overlap the wrapping materials with two folds so that the inner surfaces face each other and the folds correspond to each other. A pair of side wrapping materials are folded in half on both sides between the two wrapping materials and sandwiched so as to form side gussets, and ribbed heat sealing is applied to both side edges of the four sheets to form a flat cylinder as a rib Next, the side gusset is secured to the upstream side of each fold, and the bottom heat seal is applied to the upstream side of the side gusset, and then the upstream side of each bottom heat seal is cut to open the upper end. Folds with folds Method of manufacturing a pleated flat bag, characterized in that disconnecting a bag.

The wrapping material is fed out from the raw material roll of the wrapping material, the inner surfaces are heat-sealed in a palm-like shape, and the folds extending in the width direction of the wrapping material are formed so as to have an arrangement pitch of the required dimensions, Cut the wrapping material with folds in the vertical direction so that the width is halved, and overlap the wrapping materials with two folds so that the inner surfaces face each other and the folds correspond to each other. A pair of side wrapping materials are folded in half on both sides between the two wrapping materials and sandwiched so as to form side gussets, and ribbed heat sealing is applied to both side edges of the four sheets to form a flat cylinder as a rib Then, top heat seal is applied to the position away from the height of the bag to the downstream side of each fold, and then the downstream side of each top heat seal is cut and separated as a flat bag with a fold of the lower end opening type. Features pleats Method of manufacturing a flat bag.