JP6021782B2 - シート貼合方法及びシート貼合装置 - Google Patents
シート貼合方法及びシート貼合装置 Download PDFInfo
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- JP6021782B2 JP6021782B2 JP2013217319A JP2013217319A JP6021782B2 JP 6021782 B2 JP6021782 B2 JP 6021782B2 JP 2013217319 A JP2013217319 A JP 2013217319A JP 2013217319 A JP2013217319 A JP 2013217319A JP 6021782 B2 JP6021782 B2 JP 6021782B2
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Description
先ず、本発明のシート貼合方法及び貼合装置によって形成される輸液バッグ10の全体構成を説明する。
図2及び図3は、シート貼合装置20を用いて、バッグ本体11の上面にガスバリア性機能シート12を貼り合わせる場合で示している。即ち、ガスバリア性機能シート12である機能性シートを上側に配置する例で説明する。
図2及び図3に示すように、押圧型25は、四角形な上型27と四角形な下型28とで構成され、上型27の四角形な押圧面27aと下型28の四角形な押圧面28aとが対向配置される。なお、本実施の形態では、四角形なバッグ本体11に四角形なガスバリア性機能シート12を貼り合わせるので、四角形な押圧型25を使用したが、押圧型25を四角形に限定するものではない。
図2及び図3は、ガス吹付手段29の第1の実施の形態である。
図2及び図3に示すシート貼合装置の場合には、支持ピン30は、下型28の押圧面28aの4角に上向きに突出して形成される。なお、支持ピン30の数は、下型28の押圧面28aの少なくとも対向する2つの角に配置することが好ましく、3角であることが更に好ましく、4角であることが特に好ましい。また、4角の間に更に支持ピン30を更に配置することも可能である。なお、図6及び図7に示したシート貼合装置では、支持ピン30を設ける例で図示されている。しかし、図6及び図7に示したシート貼合装置の場合には、ガスバリア性機能シート12の四方がケーシング38の4つの側壁によって囲まれることにより自然に位置決めされるので、支持ピンを一切使用しない態様でもよい。
次に、上記の如く構成されたシート貼合装置20を用いて、本実施の形態のシート貼合方法を説明する。本実施の形態では、バッグ本体11の上面(一方面)にガスバリア性機能シート12を貼り合わせる場合で説明する。
図10に示すように、先ず、バッグ本体11の上面に貼り合わせるガスバリア性機能シート12として、バッグ本体11の上面の面積よりも拡大した面積拡大部分12Sを有するガスバリア性機能シート12を準備する。
次に、図16に示すように、ガスバリア性機能シート12の面積拡大部分12Sがバッグ本体11の一方面に重ならないように位置決めしながら、バッグ本体11の周縁部(四方封止部分)とガスバリア性機能シート12の四方封止部分とを、押圧型の下型28に設けた4本の支持ピン30に貫通支持させる。ガスバリア性機能シート12の四方封止部分は、図10の2点鎖線の外側で面積拡大部分12Sを除いた部分となる。
次に、図17に示すように、一対のガス噴出器29Aからガスバリア性機能シート12の面積拡大部分12Sに窒素ガスを吹き付けて、ガスバリア性機能シート12の下側空間に窒素ガス雰囲気を形成する。
次に、ガス噴出器29Aから窒素ガスを噴出させたままで、押圧型25の押圧機構を駆動させて、上型27を下降させる。そして、図18に示すように、上型27の押圧面27aで下型28の押圧面28aを押圧し、バッグ本体11の周縁部(四方封止部分)とガスバリア性機能シート12の四方封止部分とを挟み込む。この状態で上型27の加熱部31をONにする。なお、加熱部31のON操作は、押圧型25にバッグ本体11とガスバリア性機能シート12とを挟み込む前に行ってもよい。
Claims (12)
- 被貼合物と機能性シートとを重ね合わせて前記被貼合物の周縁部を封止することにより前記機能性シートを前記被貼合物に貼り合わせるシート貼合方法において、
前記重ね合わされる被貼合物と機能性シートとのうち上側に配置される前記被貼合物又は前記機能性シートについて、互いに重ね合わさらない面積拡大部分を前記封止する部分の外側に予め形成しておく準備工程と、
前記被貼合物と前記機能性シートとを面積拡大部分が重ならないように位置決めしながら重ね合わせる重ね合わせ工程と、
前記重ね合わせ工程の後に、面積拡大部分に下方からガスを吹き付けて被貼合物と機能性シートとの間に形成される封止空間の空気を所望のガスで置換するガス置換工程と、ガス置換工程を行いながら封止する封止工程と、を備えたシート貼合方法。 - 前記被貼合物は包装体である請求項1に記載のシート貼合方法。
- 前記被貼合物又は機能性シートに切欠き部を形成することにより面積拡大部分を形成する請求項1又は2に記載のシート貼合方法。
- 前記被貼合物に貫通穴を形成することにより面積拡大部分を形成する請求項1又は2に記載のシート貼合方法。
- 前記ガス置換工程では、面積拡大部分にガスを吹き付けるとともに封止空間の横方向からもガスを吹き付ける請求項1から4の何れか1項に記載のシート貼合方法。
- 前記重ね合わせ工程では、封止工程を行う押圧型に設けられた複数の支持ピンに、被貼合物と機能性シートの封止部分若しくは封止部分の外側部分を貫通させることにより被貼合物と機能性シートとを位置決めする請求項1から5の何れか1項に記載のシート貼合方法。
- 前記被貼合物及び前記機能性シートの前記支持ピンが貫通する位置には予め貫通穴が形成されている請求項6に記載のシート貼合方法。
- 前記複数の支持ピンは、封止工程を行うときには、押圧型の内部に没入する請求項6又は7に記載のシート貼合方法。
- 被貼合物と機能性シートとを重ね合わせて前記被貼合物の周縁部を封止することにより前記機能性シートを前記被貼合物に貼り合わせるシート貼合装置において、
上型と下型とで構成され、前記上型の押圧面と前記下型の押圧面とで前記被貼合物の封止部分と前記機能性シートの封止部分とを挟み込んで加熱することにより封止を行う押圧型と、
押圧型に設けられ、前記被貼合物と前記機能性シートとの封止部分若しくは封止部分の外側部分を貫通させることにより、重ね合わされる前記被貼合物と前記機能性シートとのうち上側に配置される前記被貼合物又は前記機能性シートの封止外側部分に予め形成されている面積拡大部分が重ね合わさらないように被貼合物と機能性シートとを位置決めする複数の支持ピンと、
前記面積拡大部分に下方からガスを吹き付けるガス吹付手段と、を備えたシート貼合装置。 - 前記ガス吹付手段には、面積拡大部分に吹き付けられたガスが面積拡大部分の外側に拡散しないための拡散防止板が備えられている請求項9に記載のシート貼合装置。
- 前記ガス吹付手段には、
前記面積拡大部分にガスを吹き付ける第1の吹付け手段と、
前記被貼合物の機能性シートとの間に形成される封止空間に向けてガスを吹き付ける第2の吹付け手段と、を備える請求項9に記載のシート貼合装置。 - 前記ガス吹付手段は、下型が収納されるケーシングを備え、該ケーシングの側壁と下型の側壁との間にガスの吹き出し流路であるガス流路を少なくとも対向させて一対設けてなる請求項9に記載のシート貼合装置。
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