JP4024180B2

JP4024180B2 - Packaging bag

Info

Publication number: JP4024180B2
Application number: JP2003162762A
Authority: JP
Inventors: 正行遠田
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2003-06-06
Filing date: 2003-06-06
Publication date: 2007-12-19
Anticipated expiration: 2023-06-06
Also published as: JP2004359322A

Description

【０００１】
【発明の属する技術分野】
本発明は、物品が収納される略直方体状の収納本体と、該収納本体の上面に延設された略板状で且つ吊り手開孔を有する吊り手部とを、上方開口部及び下方開口部を有する断面略長方形状のチューブ状フィルムにより形成した包装袋に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
使い捨ておむつ等の吸収性物品やペットの餌等の粒状物をパック詰めする場合に、上方開口部及び下方開口部を有する断面略長方形状のチューブ状フィルムから形成され、該上方開口部及び該下方開口部が封止されてなる包装袋が用いられている。
【０００３】
かかる構成の包装袋の上方開口部の封止部には、チューブ状フィルムの上方開口部近傍における左右側面がそれぞれ内方に折り返され、上方開口部近傍における前後面がそれらの間に、折り返された左右側面を介在した状態で近接した形態が多く用いられている（特許文献１参照）。
【０００４】
また、包装袋の持ち運びの便宜のために、図８に示す包装袋１０１のように、収納本体１０２の上面に、上方開口部の封止部に開孔１３５が形成されてなる吊り手部１０３を備えた包装袋が用いられている。吊り手部１０３は、図９（ａ）に示すように、左マチ部１３３及び右マチ部１３４がそれぞれ内方に折り返され、前板１３１及び後板１３２がそれらの間に、折り返された左マチ部１３３及び右マチ部１３４を介在して近接され、前板１３１及び後板１３２を貫通する開孔１３５を設けることにより形成される。尚、吊り手部１０３における開孔１３５の上方及び下方には、それぞれ横方向にヒートシール部Ｈ１０１及びＨ１０２が形成されている。
【０００５】
しかし、かかる構造の吊り手部１０３においては、開孔１３５に指を引っ掛けて包装袋１０１を持ち運ぶ際に、前板１３１及び後板１３２のみで負荷を支えるため、吊り手部１０３の開孔１３５周辺の強度が弱い。そのため、例えば、図９（ｂ）に示すように、吊り手部１０３の前板１３１に、チューブ状フィルムとは別体の補強フィルム１０５（一般的には、７０〜１００μｍ厚）を設け、吊り手部１０３の強度を向上させている。
【０００６】
仮に、このような補強フィルムが設けられていないと、吊り手部１０３における開孔１３５周辺の強度が不足し、該開孔１３５に指を掛けて包装袋１０１を持ち運ぶ際に、吊り手部１０３における開孔１３５上方の部分が延びたり（図１０参照）、切れることがある。最近は、フィルムのコストダウンの要請から、フィルムの厚みを薄くする傾向があり、吊り手部の強度を確保することが一層難しくなっており、そのため、補強フィルムが必要となる場合が多くなっている。
【０００７】
【特許文献１】
特開２００１−２０６３９１号公報
【０００８】
従って、本発明の目的は、収納本体と吊り手部とを上方開口部及び下方開口部を有するチューブ状フィルムにより形成した包装袋において、該吊り手部を補強フィルムで補強しなくても、該吊り手部が十分な強度を有する包装袋及び該包装袋に吸収性物品を収納してなる物品包装構造を提供することにある。
【０００９】
【課題を解決するための手段】
本発明は、物品が収納される略直方体状の収納本体と、該収納本体の上面に延設された略板状で且つ吊り手開孔を有する吊り手部とを、上方開口部及び下方開口部を有する断面略長方形状のチューブ状フィルムにより形成した包装袋であって、前記チューブ状フィルムにおける前記上方開口部の近傍に、該チューブ状フィルムの前面から左側面を経て後面に亘る左切り込み線及び該チューブ状フィルムの前面から右側面を経て後面に亘る右切り込み線が、それぞれ該チューブ状フィルムの横断面に沿って略同じ高さに形成されており、前記収納本体は、前記チューブ状フィルムにおける前記左切り込み線及び前記右切り込み線の下方及び前記下方開口部の近傍がそれぞれ封止されて形成されており、前記吊り手部は、前記チューブ状フィルムにおける前記上方開口部と前記左切り込み線との間の左マチ部及び該チューブ状フィルムにおける該上方開口部と前記右切り込み線との間の右マチ部が、それぞれ前記収納本体の左側面及び右側面よりも該チューブ状フィルムの内方に位置するように折り込まれ、前記チューブ状フィルムにおける前記収納本体の前面上部に位置する吊り手部前板と該収納本体の後面上部に位置する吊り手部後板とが、折り込まれた前記左マチ部及び前記右マチ部とを介在した状態で近接して形成されており、前記吊り手開孔は、前記吊り手部前板及び前記吊り手部後板を、折り込まれた前記左マチ部及び前記右マチ部と共に貫通して形成されている包装袋を提供することにより前記目的を達成したものである。
【００１０】
また、本発明は、前記包装袋に圧縮可能な吸収性物品を複数個収納してなる物品包装構造であって、前記吸収性物品は、使い捨ておむつであり、前記収納本体の左側面と右側面との間に、複数個の該使い捨ておむつが、その腹側部及び背側部を該左右側面と平行にして、圧縮整列状態で直列に収納されている物品包装構造を提供するものである。
【００１１】
【発明の実施の形態】
以下、本発明の包装袋及び物品包装構造を、その好ましい一実施形態に基づき図面を参照しながら説明する。
本実施形態の包装袋は、図１〜図３及び図５に示すように、物品（使い捨ておむつ）Ａが収納される略直方体状の収納本体２と、該収納本体２の上面２５に延設された略板状で且つ吊り手開孔３５を有する吊り手部３とを、上方開口部Ｆ１及び下方開口部Ｆ２を有する断面略長方形状のチューブ状フィルムＦにより形成した包装袋１であって、前記チューブ状フィルムＦにおける前記上方開口部Ｆ１の近傍に、該チューブ状フィルムＦの前面２１から左側面２３を経て後面２２に亘る左切り込み線Ｃ１及び該チューブ状フィルムＦの前面２１から右側面２４を経て後面２２に亘る右切り込み線Ｃ２が、それぞれ該チューブ状フィルムＦの横断面に沿って略同じ高さに形成されている。
【００１２】
そして、本実施形態の包装袋１においては、前記収納本体２は、前記チューブ状フィルムＦにおける前記左切り込み線Ｃ１及び前記右切り込み線Ｃ２の下方及び前記下方開口部Ｆ２の近傍がそれぞれ封止されて形成されており、前記吊り手部３は、前記チューブ状フィルムＦにおける前記上方開口部Ｆ１と前記左切り込み線Ｃ１との間の左マチ部３３及び該チューブ状フィルムＦにおける該上方開口部Ｆ１と前記右切り込み線Ｃ２との間の右マチ部３４が、それぞれ前記収納本体２の左側面２３及び右側面２４よりも該チューブ状フィルムＦの内方に位置するように折り込まれ、前記チューブ状フィルムＦにおける前記収納本体２の前面２１上部に位置する吊り手部前板３１と該収納本体２の後面２２上部に位置する吊り手部後板３２とが、折り込まれた前記左マチ部３３及び前記右マチ部３４とを介在した状態で近接して形成されており、前記吊り手開孔３５は、前記吊り手部前板３１及び前記吊り手部後板３２を、折り込まれた前記左マチ部３３及び前記右マチ部３４と共に貫通して形成されている。
【００１３】
本実施形態の包装袋１について詳述する。
本発明の包装袋におけるチューブ状フィルムＦは、図５に示すように、上方開口部Ｆ１及び下方開口部Ｆ２を有する断面略長方形状のチューブ状フィルムである。
本発明の包装袋におけるチューブ状フィルムの素材としては、例えば、ポリエチレン、ポリプロピレン、ポリエステルを用いることができる。本実施形態においては、ポリエチレンを用いている。
チューブ状フィルムの長さ、横断面方向の周長、厚み等は、得ようとする包装袋の収納物品の大きさ、形状、重量、物性等に基づき適宜選定される。チューブ状フィルムについて、長さは好ましくは２０ｃｍ〜６０ｃｍであり、横断面方向の周長は好ましくは５０ｃｍ〜１００ｃｍであり、厚みは好ましくは４０μｍ〜１００μｍである。
【００１４】
「断面略長方形状のチューブ状フィルム」の「略長方形状」には、幾何学的な長方形状に限らず、その全体として長方形と同視できるものも含む。例えば、各辺及び各頂点が若干曲がっていたり、若干丸くなっているものや、折り曲げ部分、折り返し部分があるものを含む。また、包装袋の完成時又は包装袋に物品を収納した状態で「略長方形状」になっていればよく、包装袋の完成前（製造時）又は物品を収納する前においては、略円形、略楕円形〔図５（ａ）参照〕や潰れた形〔図５（ｂ）〜（ｄ）参照〕等になっているものも含む。
【００１５】
本実施形態の包装袋１は、図１〜図３に示すように、収納本体２と吊り手部３とを備えてなる。収納本体２は、前面２１、後面２２、左側面２３、右側面２４、上面２５及び下面２６からなる略直方体状であり、その上端部（封止部）２７及び下端部（封止部）２８が封止されて形成されている。
尚、「略直方体状の収納本体」の「略直方体状」には、幾何学的な直方体状に限らず、その全体として直方体と同視できるものも含む。例えば、各面、各辺及び各頂点が若干曲がっていたり、若干丸くなっているものや、当接部分、折り曲げ部分、折り返し部分があるものを含む。
【００１６】
収納本体２には、種々の物品を収納することができ、収納される物品としては、使い捨ておむつ、生理用ナプキン等の圧縮可能な吸収性物品、ペットの餌、米等の粒状物等が挙げられる。本実施形態の包装袋１においては、図３に示すように、前記収納本体２の左側面２３と右側面２４との間に、複数個の該使い捨ておむつＡが、その腹側部及び背側部を該左側面２３・右側面２４と平行にして、圧縮整列状態で直列に収納されており、本実施形態の物品包装構造を構成している。
【００１７】
収納本体２の上面２５には、図１に示すように、略板状の吊り手部３が上方に向けて延設されている。図２に示すように、吊り手部３においては、左マチ部３３及び右マチ部３４が、それぞれ収納本体２の左側面２３及び右側面２４よりもチューブ状フィルムＦの内方に位置するように折り込まれている。また、収納本体２の前面２１上部に位置する吊り手部前板３１と収納本体２の後面２２上部に位置する吊り手部後板３２とが、折り込まれた左マチ部３３及び右マチ部３４とを介在した状態で近接している。そして、吊り手部前板３１と吊り手部後板３２との間において、左マチ部３３と右マチ部３４とが重なっている。
尚、「略板状の吊り手部」の「略板状」には、完全な板状のものに限らず、その全体として板状と同視できるものも含む。例えば、図１及び図２（ａ）に示すような、前板３１と後板３２とが近接しているが、厚み方向に完全には接合していないものも含む。
【００１８】
吊り手部３には、図２に示すように、吊り手開孔３５が形成されている。吊り手開孔３５は、吊り手部前板３１及び吊り手部後板３２を、折り込まれた左マチ部３３及び右マチ部３２と共に貫通して形成されている。
本実施形態においては、左マチ部３３の折り返し頂線３３ａ及び右マチ部３４の折り返し頂線３４ａは、何れも吊り手開孔３５の両側部よりも内方に位置している。そのため、図２（ａ）に示すように、吊り手開孔３５の幅方向中央部周辺は、前板３１、右マチ部３４（２枚）、左マチ部３３（２枚）及び後板３２の６枚のフィルムを貫通して形成されている。また、吊り手開孔３５の左側部周辺は、前板３１、左マチ部３３（２枚）及び後板３２の４枚のフィルムを貫通して形成されている。また、吊り手開孔３５の右側部周辺は、前板３１、右マチ部３４（２枚）及び後板３２の４枚のフィルムを貫通して形成されている。
【００１９】
吊り手部３の各部寸法は、チューブ状フィルムＦの周長、左切り込み線Ｃ１、右切れ込み線Ｃ２の長さ、左マチ部３３、右マチ部３４の折り込みの程度等によって適宜選択される。吊り手部３の幅Ｌ１（図３参照、以下同様）は好ましくは１２０ｍｍ〜１８０ｍｍであり、吊り手開孔３５の幅Ｌ２は好ましくは１００ｍｍ〜１２０ｍｍであり、吊り手部３の側端部と吊り手開孔３５の側端部との距離Ｌ３は好ましくは１０ｍｍ〜３０ｍｍである。
【００２０】
また、吊り手部３の両側縁下端３ａ、３ａ〔図２参照（ｂ）〕は、それぞれ末広がり形状で、収納本体２の上面２５の上端縁（封止部）２７に連続している。吊り手部３の両側縁下端３ａ、３ａがこのような末広がり形状に形成されていると、図４（ａ）に示すような、両側縁下端が直角に形成されている吊り手部３ではその直角の下端部から容易に破断してしまう虞があるのに対し、吊り手部３の両側縁下端３ａ、３ａへの集中荷重が低減され、そのような破断が生じ難い。
【００２１】
収納本体２の上端部（封止部）２７には、図１〜図３に示すように、尖端が下方に向いた、収納本体２切断用の切欠部４１が吊り手部３を避けて形成されている。また、切欠部４１の尖端から下方に延びるように、２本のミシン目４２，４２が、それぞれ収納本体２の上面２５を経て前面２１まで及び上面２５を経て後面２２まで形成されている。
図３に示すように、切欠部４１が設けられていると、収納本体２の開封時に切欠部４１から収納本体２を容易に破断することができる。また、ミシン目４２が設けられていると、切欠部４１から切断された切断線がミシン目４２に沿って容易に延びるようになる。
【００２２】
次に、本実施形態の包装袋の一製造方法について、図５を参照して説明する。
先ず、図５（ａ）に示すように、上方開口部Ｆ１及び下方開口部Ｆ２を有する断面略長方形状のチューブ状フィルムＦ（前述の通り、製造時においては必ずしも断面略長方形状ではなくてもよい）における上方開口部Ｆ１の近傍に、チューブ状フィルムＦの前面（チューブ状フィルムＦの断面が略長方形状であるときの「前面」又は包装袋完成時の「前面」。以下同様）２１から左側面２３を経て後面２２に亘る左切り込み線Ｃ１及びチューブ状フィルムＦの前面２１から右側面２４を経て後面２２に亘る右切り込み線Ｃ２をそれぞれチューブ状フィルムＦの横断面に沿って略同じ高さに形成する。
【００２３】
次に、図５（ｂ）に示すように、チューブ状フィルムＦにおける左切り込み線Ｃ１と下方開口部Ｆ２の間の部分２３（最終的に収納本体２の左側面２３となる部分）を内方に折り返し、チューブ状フィルムＦにおける右切り込み線Ｃ２と下方開口部Ｆ２との間の部分２４（最終的に収納本体２の右側面２４となる部分）を内方に折り返す。
また、チューブ状フィルムＦにおける上方開口部Ｆ１と左切り込み線Ｃ１との間の左マチ部３３を前記部分２３よりも内方に位置するように折り込み、チューブ状フィルムＦにおける上方開口部Ｆ１と右切り込み線Ｃ２との間の右マチ部３４を前記部分２４よりも内方に位置するように折り込む。
【００２４】
更に、図５（ｃ）に示すように、チューブ状フィルムＦにおける前面２１上部に位置する吊り手部前板３１と後面２２上部に位置する吊り手部後板３２とを、折り込まれた左マチ部３３及び右マチ部３４とを介在して近接させる。ここで、左マチ部３３と右マチ部３４とが重ねられる。
また、左切り込み線Ｃ１の所定位置に、切欠部４１及びミシン目４２を形成する。
【００２５】
その後、図５（ｄ）に示すように、吊り手部前板３１及び吊り手部後板３２の上縁部及び下縁部にそれぞれ横方向にヒートロールをし、ヒートロール部Ｈ１及びＨ２を形成して、吊り手部３１を形成する。また、チューブ状フィルムＦの前面２１及び後面２２における左切り込み線Ｃ１及び右切り込み線Ｃ２の下方に横方向にヒートシールをし、ヒートシール部Ｈ３を形成して、収納本体２における上面２５の上縁部（封止部）２７を形成する。
【００２６】
然る後、チューブ状フィルムＦの下方開口部Ｆ２から、収納本体２の左側面２３と右側面２４との間に、複数個の使い捨ておむつＡを、その腹側部及び背側部を左側面２３・右側面２４と平行にして、圧縮整列状態で直列に収納する（図３参照）。その後、下方開口部Ｆ２を封止する。
このようにして、使い捨ておむつＡが圧縮整列状態で収納された本実施形態の包装袋１、即ち、本実施形態の物品包装構造が得られる。
【００２７】
本発明の包装袋においては、吊り手開孔３５は、図６（ａ）に示すように、少なくとも左マチ部３３の折り込み頂点３３ａ近傍及び右マチ部３４の折り返し頂線３４ａ近傍を貫通して形成されている必要がある。このように形成することにより、少なくとも、吊り手部３における吊り手開孔３５の両側部から外方部分の強度が高くなる。
また、図６（ｂ）に示すように、吊り手部３がその幅方向全域に亘って少なくとも４枚のフィルムで形成されるには、少なくとも左マチ部３３の折り返し頂線３３ａと右マチ部３４の折り返し頂線３４ａとが当接していることが必要である。
【００２８】
更に、図２（ａ）に示す実施形態のように、吊り手開孔３５の少なくとも一部が６枚のフィルムを貫通して形成されるには、吊り手部前板３１と吊り手部後板３２との間において、左マチ部３３と右マチ部３４とが重なっていることが必要である。
更にまた、図６（ｃ）に示すように、吊り手開孔３５が、その幅方向全域に亘って６枚のフィルムを貫通して形成されるためには、左マチ部３３の折り込み頂点３３ａが吊り手開孔３５の右側縁よりも右方に位置し、右マチ部３４の折り込み頂点３４ａが吊り手開孔３５の左側縁よりも左方に位置していることが必要である。
【００２９】
本実施形態の包装袋によれば、従来の包装袋においては有効に活用されていなかった吊り手部の両側縁部近傍部分を有効活用することにより、吊り手部３がその幅方向全域に亘って少なくとも４枚のフィルムで形成されており、特に、吊り手開孔３５の少なくとも一部が６枚のフィルムを貫通して形成されているため、補強フィルムを用いることなく、十分な強度を有する吊り手部３が形成される。しかも、該吊り手部３は、補強フィルムで補強した従来の包装袋における吊り手部（図８、図９参照）よりも強度が強い。
また、本実施形態の物品包装構造によれば、強度の強い吊り手部を有する包装袋に大量の使い捨ておむつを効率的に収納することができる。
【００３０】
以上、本発明の包装袋及び物品包装構造の好ましい一実施形態について説明したが、本発明は、前述した実施形態に制限されることなく、本発明の趣旨を逸脱しない限り、適宜変更が可能である。
【００３１】
吊り手部３のヒートシール部の形成位置は、吊り手部３の前板３１と後板３２の近接状態を保持できれば、種々の配置位置とすることができる。例えば、吊り手部３の下端部の横方向のヒートシール部Ｈ２〔図５（ｄ）参照〕に代えて、図７に示すように、吊り手開孔３５の両側縁外方それぞれに上下方向のヒートシール部Ｈ４、Ｈ５を形成することができる。また、ヒートシール以外の封止手段を用いることができる。
【００３２】
【発明の効果】
本発明の包装袋によれば、吊り手部を補強フィルムで補強しなくても、吊り手部が十分な強度を有している。本発明の物品包装構造によれば、強度の強い吊り手部を有する包装袋に大量の使い捨ておむつを効率的に収納することができる。
【図面の簡単な説明】
【図１】本発明の包装袋の一実施形態を示す斜視図である。
【図２】本発明の包装袋の一実施形態を示す図で、（ａ）は（ｂ）に示すＡ−Ａ断面図、（ｂ）は収納本体の上部及び吊り手部を示す正面図である。
【図３】本発明の包装袋の一実施形態を示す正面図で、切欠部から収納本体を開封している状態を示す図である。
【図４】吊り手部が収納本体から破断する状態を示す正面図である。
【図５】本発明の包装袋の一実施形態の一製造方法を工程順に示す模式的斜視図である。
【図６】本発明の包装袋の吊り手部の断面構造を種々示す図で、（ａ）〜（ｃ）は（ｄ）に示すＢ−Ｂ断面図〔図２（ａ）相当図〕、（ｄ）は収納本体の上部及び吊り手部を示す正面図である。
【図７】本発明の包装袋における吊り手部のヒートシール部の形成位置を変更した変更例の斜視図〔図５（ｄ）相当図〕である。
【図８】従来の包装袋を示す斜視図である。
【図９】従来の包装袋を示す図で、（ａ）は（ｂ）に示すＣ−Ｃ断面図〔図２（ａ）相当図〕、（ｂ）は収納本体の上部及び吊り手部を示す正面図である。
【図１０】吊り手部が延びきった状態を示す正面図である。
【符号の説明】
１包装袋
２収納本体
２１前面
２２後面
２３左側面
２４右側面
２５上面
２６下面
２７上縁部（封止部）
２８下縁部（封止部）
３吊り手部
３１吊り手部前板
３２吊り手部後板
３３左マチ部
３４右マチ部
３５吊り手開孔
４１切欠部
４２ミシン目
Ａ物品（使い捨ておむつ）
Ｃ１左切り込み線
Ｃ２右切り込み線
Ｆチューブ状フィルム
Ｆ１上方開口部
Ｆ２下方開口部
Ｈ１、Ｈ２、Ｈ３、Ｈ４、Ｈ５ヒートシール部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a substantially rectangular parallelepiped storage main body in which articles are stored, and a suspension part having a substantially plate shape extending on the upper surface of the storage main body and having a suspension opening, and an upper opening and a lower opening. The present invention relates to a packaging bag formed of a tube-shaped film having a substantially rectangular section.
[0002]
[Prior art and problems to be solved by the invention]
When packing an absorbent article such as a disposable diaper or a granular material such as pet food, it is formed from a tubular film having a substantially rectangular cross section having an upper opening and a lower opening, and the upper opening and the lower A packaging bag having an opening sealed is used.
[0003]
In the sealing portion of the upper opening portion of the packaging bag having such a configuration, the left and right side surfaces in the vicinity of the upper opening portion of the tubular film are folded inward, and the front and rear surfaces in the vicinity of the upper opening portion are folded back therebetween. The form which adjoined in the state which interposed the right-and-left side face was used (refer patent document 1).
[0004]
Further, for the convenience of carrying the packaging bag, as shown in the packaging bag 101 shown in FIG. 8, the suspension portion 103 is formed by forming an opening 135 in the upper opening sealing portion on the upper surface of the storage body 102. The packaging bag provided with is used. As shown in FIG. 9A, the suspension part 103 has a left gusset part 133 and a right gusset part 134 folded inward, respectively, and a front plate 131 and a rear plate 132 folded between them. It is formed by providing an opening 135 that passes through the front plate 131 and the rear plate 132 and is adjacent to each other with the gusset portion 133 and the right gusset portion 134 interposed therebetween. Note that heat seal portions H101 and H102 are formed in the lateral direction above and below the opening 135 in the suspension portion 103, respectively.
[0005]
However, in the suspension part 103 having such a structure, when carrying the packaging bag 101 by hooking a finger to the opening 135, the load is supported only by the front plate 131 and the rear plate 132. The surrounding strength is weak. Therefore, for example, as shown in FIG. 9B, a reinforcing film 105 (generally 70 to 100 μm in thickness) separate from the tube-like film is provided on the front plate 131 of the suspension part 103 and suspended. The strength of the hand portion 103 is improved.
[0006]
If such a reinforcing film is not provided, the strength around the opening 135 in the hanging part 103 is insufficient, and when the packaging bag 101 is carried by placing a finger on the opening 135, the hanging part 103 The portion above the opening 135 may extend (see FIG. 10) or may be cut off. Recently, there has been a tendency to reduce the thickness of the film due to demands for reducing the cost of the film, and it has become more difficult to secure the strength of the suspension part. Therefore, a reinforcing film is often required. Yes.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-206391
Therefore, an object of the present invention is to provide a packaging bag in which a storage body and a suspension part are formed of a tubular film having an upper opening part and a lower opening part, even if the suspension part is not reinforced with a reinforcing film. An object of the present invention is to provide a packaging bag having a sufficient strength of a hanging part and an article packaging structure in which an absorbent article is accommodated in the packaging bag.
[0009]
[Means for Solving the Problems]
The present invention relates to a substantially rectangular parallelepiped storage main body in which articles are stored, and a suspension part having a substantially plate shape extending on the upper surface of the storage main body and having a suspension opening, and an upper opening and a lower opening. A left side cut line extending from the front surface of the tubular film through the left side surface to the rear surface in the vicinity of the upper opening in the tubular film. And a right cut line extending from the front surface of the tubular film through the right side surface to the rear surface is formed at substantially the same height along the cross section of the tubular film, and the storage body is formed of the tubular film. The left cut line and the right cut line below and in the vicinity of the lower opening are respectively sealed, and the suspension part is formed of the tubular film. A left gusset between the upper opening and the left cut line and a right gusset between the upper opening and the right cut line in the tubular film, respectively, A front part of a suspension part that is folded so as to be located inward of the tubular film relative to the surface, and is located at the upper front part of the storage body in the tubular film, and a suspension part that is located at the upper part of the rear surface of the storage body A rear plate is formed adjacent to each other with the folded left gusset portion and the right gusset portion interposed therebetween, and the suspension opening is formed on the rear portion of the suspension portion front plate and the suspension portion. The object is achieved by providing a packaging bag formed by penetrating a plate with the folded left gusset and the right gusset.
[0010]
Further, the present invention is an article packaging structure in which a plurality of compressible absorbent articles are stored in the packaging bag, wherein the absorbent article is a disposable diaper, and a left side surface and a right side surface of the storage body A plurality of the disposable diapers provide an article packaging structure in which the stomach side portion and the back side portion are parallel to the left and right side surfaces and are stored in series in a compressed and aligned state.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a packaging bag and an article packaging structure of the present invention will be described based on a preferred embodiment thereof with reference to the drawings.
The packaging bag of this embodiment is extended in the substantially rectangular parallelepiped storage main body 2 in which the article | item (disposable diaper) A is accommodated, and the upper surface 25 of this storage main body 2, as shown in FIGS. A packaging bag 1 formed by a tube-shaped film F having a substantially rectangular cross section having an upper opening F1 and a lower opening F2. In the vicinity of the upper opening F1 in the tubular film F, a left cut line C1 extending from the front surface 21 of the tubular film F to the rear surface 22 through the left surface 23 and the right surface from the front surface 21 of the tubular film F. 24, the right cut line C2 extending over the rear surface 22 is formed at substantially the same height along the cross section of the tubular film F.
[0012]
And in the packaging bag 1 of this embodiment, the said storage main body 2 is each sealed in the tube-shaped film F below the said left cut line C1 and the said right cut line C2, and the vicinity of the said downward opening part F2. The suspension part 3 is formed of a left gusset 33 between the upper opening F1 in the tubular film F and the left cut line C1, and the upper opening F1 in the tubular film F. And the right gusset portion 34 between the right cut line C2 and the left side surface 23 and the right side surface 24 of the storage main body 2 are folded so as to be located inward of the tubular film F. A hanging part front plate 31 located above the front surface 21 of the storage body 2 in the film F, and a hanging part rear plate 32 located above the rear surface 22 of the storage body 2 include: The left gusset portion 33 and the right gusset portion 34 that are inserted are adjacent to each other, and the suspension opening 35 is formed on the suspension portion front plate 31 and the rear portion of the suspension portion. A plate 32 is formed through the folded left gusset 33 and right gusset 34.
[0013]
The packaging bag 1 of this embodiment is explained in full detail.
As shown in FIG. 5, the tubular film F in the packaging bag of the present invention is a tubular film having a substantially rectangular cross section having an upper opening F1 and a lower opening F2.
As a raw material for the tube-shaped film in the packaging bag of the present invention, for example, polyethylene, polypropylene, or polyester can be used. In this embodiment, polyethylene is used.
The length of the tube-shaped film, the circumferential length in the cross-sectional direction, the thickness, and the like are appropriately selected based on the size, shape, weight, physical properties, etc. of the packaging bag to be obtained. For the tubular film, the length is preferably 20 cm to 60 cm, the circumferential length in the cross-sectional direction is preferably 50 cm to 100 cm, and the thickness is preferably 40 μm to 100 μm.
[0014]
The “substantially rectangular shape” of the “tubular film having a substantially rectangular cross section” is not limited to a geometric rectangular shape, and includes a film that can be regarded as a rectangle as a whole. For example, it includes those in which each side and each vertex are slightly bent or slightly rounded, and those having a bent portion and a folded portion. In addition, it may be “substantially rectangular” when the packaging bag is completed or the article is stored in the packaging bag. Before the packaging bag is completed (manufacturing) or before the article is stored, Also included are substantially elliptical shapes (see FIG. 5A), collapsed shapes (see FIGS. 5B to 5D), and the like.
[0015]
The packaging bag 1 of this embodiment is provided with the storage main body 2 and the suspension part 3 as shown in FIGS. The storage body 2 has a substantially rectangular parallelepiped shape including a front surface 21, a rear surface 22, a left side surface 23, a right side surface 24, an upper surface 25 and a lower surface 26, and an upper end portion (sealing portion) 27 and a lower end portion (sealing portion) 28. Is sealed and formed.
The “substantially rectangular parallelepiped shape” of the “substantially rectangular parallelepiped storage body” is not limited to a geometrical rectangular parallelepiped shape, and includes an object that can be regarded as a cuboid as a whole. For example, each surface, each side, and each vertex are slightly bent or slightly rounded, or includes a contact portion, a bent portion, and a folded portion.
[0016]
The storage main body 2 can store various articles. Examples of the stored articles include disposable diapers, compressible absorbent articles such as sanitary napkins, pet food, and granular materials such as rice. It is done. In the packaging bag 1 of the present embodiment, as shown in FIG. 3, a plurality of the disposable diapers A are provided between the left side surface 23 and the right side surface 24 of the storage main body 2, and the abdomen and back sides thereof. The parts are stored in series in a compressed and aligned state with the left side surface 23 and the right side surface 24 parallel to each other, and constitute the article packaging structure of this embodiment.
[0017]
As shown in FIG. 1, a substantially plate-like suspension part 3 extends upward on the upper surface 25 of the storage body 2. As shown in FIG. 2, in the hanging part 3, the left gusset part 33 and the right gusset part 34 are located inside the tubular film F from the left side surface 23 and the right side surface 24 of the storage body 2, respectively. It is folded in. In addition, a left gusset portion 33 and a right gusset portion 34 in which a suspension front plate 31 located on the front surface 21 of the storage body 2 and a suspension rear plate 32 positioned on the rear surface 22 of the storage body 2 are folded. Are in close proximity to each other. The left gusset portion 33 and the right gusset portion 34 overlap each other between the hanging part front plate 31 and the hanging part rear plate 32.
Note that the “substantially plate-like” of the “substantially plate-like suspension part” is not limited to a complete plate-like one, but also includes those that can be regarded as a plate-like as a whole. For example, as shown in FIG. 1 and FIG. 2A, the front plate 31 and the rear plate 32 are close to each other, but include those that are not completely joined in the thickness direction.
[0018]
As shown in FIG. 2, a suspension hole 35 is formed in the suspension portion 3. The suspender opening 35 is formed through the suspender front plate 31 and the suspender rear plate 32 together with the folded left gusset 33 and right gusset 32.
In the present embodiment, the folding top line 33 a of the left gusset portion 33 and the folding top line 34 a of the right gusset portion 34 are both located inward of the both sides of the suspension opening 35. Therefore, as shown in FIG. 2 (a), the front plate 31, the right gusset portion 34 (two pieces), the left gusset portion 33 (two pieces), and the rear plate 32 are provided around the central portion in the width direction of the suspension hole 35. These six films are penetrated. Further, the left side periphery of the suspension hole 35 is formed so as to penetrate through four films of the front plate 31, the left gusset portion 33 (two sheets), and the rear plate 32. Further, the periphery of the right side portion of the suspension hole 35 is formed so as to penetrate the four films of the front plate 31, the right gusset portion 34 (two sheets), and the rear plate 32.
[0019]
Each dimension of the hanging part 3 is appropriately selected depending on the circumference of the tubular film F, the lengths of the left cut line C1 and the right cut line C2, the degree of folding of the left gusset part 33 and the right gusset part 34, and the like. The width L1 of the hanging part 3 (see FIG. 3, the same applies hereinafter) is preferably 120 mm to 180 mm, and the width L2 of the hanging hole 35 is preferably 100 mm to 120 mm. The distance L3 from the side end of the hanging hole 35 is preferably 10 mm to 30 mm.
[0020]
Further, the lower ends 3a and 3a (see FIG. 2 (b)) of both side edges of the suspension part 3 are respectively widened toward the upper end edge (sealing part) 27 of the upper surface 25 of the storage body 2. If the lower ends 3a and 3a on both side edges of the suspension part 3 are formed in such a divergent shape, the suspension part 3 in which the lower ends on both sides are formed at right angles as shown in FIG. While there is a risk of breaking easily from the right-angled lower end, the concentrated load on the lower ends 3a and 3a on both side edges of the suspension part 3 is reduced, and such breakage is unlikely to occur.
[0021]
As shown in FIGS. 1 to 3, a cutout 41 for cutting the storage body 2 is formed on the upper end (sealing part) 27 of the storage body 2 so as to avoid the suspension part 3. Has been. Further, two perforations 42, 42 are formed through the upper surface 25 of the storage main body 2 to the front surface 21 and through the upper surface 25 to the rear surface 22 so as to extend downward from the tip of the notch 41.
As shown in FIG. 3, when the cutout portion 41 is provided, the storage body 2 can be easily broken from the cutout portion 41 when the storage body 2 is opened. In addition, when the perforation 42 is provided, a cutting line cut from the notch 41 easily extends along the perforation 42.
[0022]
Next, one manufacturing method of the packaging bag of this embodiment is demonstrated with reference to FIG.
First, as shown in FIG. 5 (a), a tubular film F having a substantially rectangular cross section having an upper opening F1 and a lower opening F2 (as described above, it may not necessarily have a substantially rectangular cross section at the time of manufacture). In the vicinity of the upper opening F1 in (good), from the front surface of the tubular film F ("front surface" when the cross section of the tubular film F is substantially rectangular or "front surface" when the packaging bag is completed. The same applies hereinafter) 21 The left cut line C1 extending through the left side surface 23 through the rear surface 22 and the right cut line C2 extending from the front surface 21 of the tubular film F through the right side surface 24 through the rear surface 22 are substantially the same height along the cross section of the tubular film F. To form.
[0023]
Next, as shown in FIG. 5B, the portion 23 (the portion that will eventually become the left side surface 23 of the storage body 2) between the left cut line C1 and the lower opening F2 in the tubular film F is inward. The portion 24 between the right cut line C2 and the lower opening F2 in the tubular film F (the portion that eventually becomes the right side surface 24 of the storage body 2) is folded inward.
Further, the left gusset 33 between the upper opening F1 and the left cut line C1 in the tubular film F is folded so as to be located inward of the portion 23, and the upper opening F1 and the right in the tubular film F are The right gusset portion 34 between the cut line C2 is folded so as to be located inward of the portion 24.
[0024]
Further, as shown in FIG. 5 (c), a left gusset in which a suspender front plate 31 positioned at the upper part of the front surface 21 and a suspender rear plate 32 positioned at the upper part of the rear surface 22 of the tubular film F are folded. The part 33 and the right gusset part 34 are placed in close proximity. Here, the left gusset 33 and the right gusset 34 are overlapped.
Moreover, the notch part 41 and the perforation 42 are formed in the predetermined position of the left cut line C1.
[0025]
Then, as shown in FIG.5 (d), it heat-rolls to the upper edge part and lower edge part of the hanging part front board 31 and the hanging part rear board 32 in the horizontal direction, respectively, and heat roll part H1 and H2 are made. Then, the suspension part 31 is formed. Further, heat sealing is performed laterally below the left and right cut lines C1 and C2 on the front surface 21 and the rear surface 22 of the tubular film F to form a heat seal portion H3. An edge portion (sealing portion) 27 is formed.
[0026]
Thereafter, a plurality of disposable diapers A are disposed between the left side surface 23 and the right side surface 24 of the storage body 2 from the lower opening F2 of the tubular film F, and the ventral side portion and the back side portion thereof are on the left side surface. 23. Store in series in a compressed and aligned state parallel to the right side surface 24 (see FIG. 3). Thereafter, the lower opening F2 is sealed.
Thus, the packaging bag 1 of this embodiment in which the disposable diaper A is stored in a compressed and aligned state, that is, the article packaging structure of this embodiment is obtained.
[0027]
In the packaging bag of the present invention, as shown in FIG. 6 (a), the suspension opening 35 penetrates at least the vicinity of the folding vertex 33a of the left gusset portion 33 and the vicinity of the folding top line 34a of the right gusset portion 34. It needs to be formed. By forming in this way, at least the strength of the outer portion from both sides of the suspension hole 35 in the suspension portion 3 is increased.
In addition, as shown in FIG. 6B, in order for the suspension part 3 to be formed of at least four films over the entire width direction, at least the folded top line 33a of the left gusset part 33 and the right gusset part. It is necessary that the folding top line 34a of 34 is in contact.
[0028]
Further, as in the embodiment shown in FIG. 2 (a), in order that at least a part of the suspension opening 35 is formed through six films, the suspension portion front plate 31 and the suspension portion rear portion are formed. It is necessary that the left gusset portion 33 and the right gusset portion 34 overlap with the plate 32.
Furthermore, as shown in FIG. 6C, in order for the suspension opening 35 to be formed through the six films over the entire width direction, the folding vertex 33a of the left gusset 33 is formed. Is located on the right side of the right edge of the hanging hole 35 and the folding apex 34a of the right gusset portion 34 needs to be located on the left side of the left side edge of the hanging hole 35.
[0029]
According to the packaging bag of the present embodiment, the suspension part 3 extends over the entire width direction by effectively utilizing the vicinity of both side edges of the suspension part that has not been effectively utilized in the conventional packaging bag. In particular, since at least a part of the suspension hole 35 is formed so as to penetrate through the six films, it has sufficient strength without using a reinforcing film. A suspension part 3 is formed. Moreover, the suspension part 3 is stronger than the suspension part (see FIGS. 8 and 9) in a conventional packaging bag reinforced with a reinforcing film.
Moreover, according to the article packaging structure of the present embodiment, a large amount of disposable diapers can be efficiently stored in a packaging bag having a strong suspension part.
[0030]
The preferred embodiment of the packaging bag and article packaging structure of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. is there.
[0031]
The formation position of the heat seal part of the hanging part 3 can be variously arranged as long as the front plate 31 and the rear plate 32 of the hanging part 3 can be kept in close proximity. For example, instead of the horizontal heat seal portion H2 [see FIG. 5 (d)] at the lower end portion of the suspension portion 3, as shown in FIG. The heat seal portions H4 and H5 can be formed. Moreover, sealing means other than heat sealing can be used.
[0032]
【The invention's effect】
According to the packaging bag of this invention, even if it does not reinforce a suspension part with a reinforcement film, a suspension part has sufficient intensity | strength. According to the article packaging structure of the present invention, a large amount of disposable diapers can be efficiently stored in a packaging bag having a strong suspension part.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a packaging bag of the present invention.
2A and 2B are views showing an embodiment of the packaging bag of the present invention, in which FIG. 2A is a cross-sectional view taken along line AA shown in FIG. 2B, and FIG. 2B is a front view showing an upper part of a storage body and a hanging part. is there.
FIG. 3 is a front view showing an embodiment of the packaging bag of the present invention, and is a view showing a state in which the storage body is opened from the notch.
FIG. 4 is a front view showing a state in which a hanging part is broken from a storage main body.
FIG. 5 is a schematic perspective view showing one manufacturing method of the embodiment of the packaging bag of the present invention in the order of steps.
6 is a diagram showing various cross-sectional structures of the suspension part of the packaging bag of the present invention, wherein (a) to (c) are BB cross-sectional views (corresponding to FIG. 2 (a)) shown in (d); (D) is a front view which shows the upper part and suspension part of a storage main body.
FIG. 7 is a perspective view (corresponding to FIG. 5 (d)) of a modified example in which the formation position of the heat seal part of the suspension part in the packaging bag of the present invention is changed.
FIG. 8 is a perspective view showing a conventional packaging bag.
FIGS. 9A and 9B are diagrams showing a conventional packaging bag, in which FIG. 9A is a cross-sectional view taken along the line C-C shown in FIG. 9B (equivalent to FIG. 2A), and FIG. FIG.
FIG. 10 is a front view showing a state where a suspension part is fully extended.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Storage body 21 Front surface 22 Rear surface 23 Left side surface 24 Right side surface 25 Upper surface 26 Lower surface 27 Upper edge part (sealing part)
28 Lower edge (sealing part)
3 Suspension part 31 Suspension part front plate 32 Suspension part rear plate 33 Left gusset part 34 Right gusset part 35 Suspension hole opening 41 Notch part 42 Perforation A Article (disposable diaper)
C1 Left cut line C2 Right cut line F Tubular film F1 Upper opening F2 Lower opening H1, H2, H3, H4, H5 Heat seal part

Claims

A cross section having an upper opening and a lower opening, a storage body having a substantially rectangular parallelepiped shape in which articles are stored, and a suspension part having a substantially plate shape and a suspension opening that extends from the upper surface of the storage body A packaging bag formed of a substantially rectangular tube-shaped film,
In the vicinity of the upper opening in the tubular film, a left score line extending from the front surface of the tubular film to the rear surface through the left side surface and a right score line extending from the front surface of the tubular film to the rear surface through the right side surface, Each is formed at substantially the same height along the cross section of the tubular film,
The storage body is formed by sealing the lower cut line and the right cut line in the tubular film and the vicinity of the lower opening, respectively.
The hanging portion includes a left gusset portion between the upper opening and the left cut line in the tubular film and a right gusset portion between the upper opening and the right cut line in the tubular film. A front plate of a suspension part that is folded so as to be located inward of the tubular film relative to the left side surface and the right side surface of the storage body, and is positioned on the front upper portion of the storage body in the tubular film, and the storage A suspension plate rear plate located at the upper rear surface of the main body is formed in close proximity with the folded left gusset portion and right gusset portion interposed therebetween,
The suspender opening is a packaging bag formed by penetrating the suspender front plate and the suspender rear plate together with the folded left gusset and right gusset.

The packaging bag according to claim 1, wherein the left gusset and the right gusset overlap each other between the hanging part front plate and the hanging part rear plate.

The packaging bag according to claim 1 or 2, wherein a cutout portion for breaking the storage main body is provided in a sealing portion on an upper surface of the storage main body so as to avoid the suspension portion.

The packaging bag according to claim 3, wherein a perforation is provided so as to extend from a pointed end of the cutout portion toward a lower surface of the storage body.

The packaging bag according to any one of claims 1 to 4, wherein lower ends of both side edges of the suspension part are each widened toward the end and are continuous with a sealing part on an upper surface of the storage body.

An article packaging structure in which a plurality of compressible absorbent articles are stored in the packaging bag according to claim 1,
The absorbent article is a disposable diaper, and a plurality of the disposable diapers are disposed between the left side surface and the right side surface of the storage main body, with the ventral side portion and the back side portion thereof being parallel to the left and right side surfaces, An article packaging structure stored in series in a compressed and aligned state.