JP2005001717A

JP2005001717A - Tube container

Info

Publication number: JP2005001717A
Application number: JP2003167486A
Authority: JP
Inventors: Takaaki Tsujimoto; 隆亮辻本; Takehiko Bizen; 毅彦備前; Masaya Nishihira; 賢哉西平; Hiroko Takamori; 寛子高森
Original assignee: Dai Nippon Printing Co Ltd
Current assignee: Dai Nippon Printing Co Ltd
Priority date: 2003-06-12
Filing date: 2003-06-12
Publication date: 2005-01-06
Anticipated expiration: 2023-06-12
Also published as: JP4478404B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube container from which content is discharged with little remainder and which is made by connecting a generally flat and thin closing member comprising a head and a hinge cap with one end of a tubular body while reducing the total amount of resin required for manufacture and keeping the rigidity of the head. <P>SOLUTION: The tube container comprises a head comprising a top panel having a discharge opening roughly in the center and a shoulder part and a joint on the periphery, and a hinge cap comprising a cover panel having a cap part protruding roughly in the center and a side wall surrounding the periphery of the cover panel and connected through a hinge at a predetermined position of the top panel. A protrusion is formed at a part facing the hinge at the side wall inside end of the hinge cap. The container is formed with a recess for fitting the protrusion on a stepped face formed on the top face of the top panel of the head. A closing member which turns the hinge cap with the hinge as a pivot shaft is connected with one end of a tubular body by a hot gluing means. The inside of the head is provided with a reinforcing rib covering the top panel and the shoulder part on a side facing the hinge part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、スナップ式のヒンジキャップの付いた閉鎖部材を筒状胴部の一端に取り付けてなるチューブ容器に関する。
【０００２】
【従来の技術】
スナップ式のヒンジキャップの付いた閉鎖部材はプラスチック成型ボトル用に開発され、またプラスチック押出しチューブ容器にも使用されている。図３は、従来のヒンジキャップの付いた閉鎖部材を採用したチューブ容器の説明図である。従来のヒンジキャップの付いた閉鎖部材を採用したチューブ容器５０の一般的なものは、図３（ａ）に示すように、ハッチングによって示されるチューブ容器本体が、筒状胴部４１、肩部４２、口頚部４３からなり、これに対して、閉鎖部材を口頚部４３に螺子止めあるいは嵌挿して取り付けてなるものである。閉鎖部材は、注出口Ｃを略中央（若干偏心している場合が多い。）に有する上板４４の周辺に側壁（スカートとも称する）４５を有するヘッド部に対して、略中央に突出した栓Ｐを有する蓋板４９とその周辺を取り巻く側壁（スカート）４５´からなるヒンジキャップを一対の連結体４７と一個の帯状体４８によって連設し、連結体４７の有するヒンジを回転軸にしてヒンジキャップの廻動を可能としたものである。このようなチューブ容器５０は、従来のスクリューキャップを取り付けて使用する押出しチューブ容器本体あるいは、ボトル本体の形状がそのまま使用され、一方で閉鎖部材も、チューブ容器本体の口頚部に取り付ける固定部４６、頭部側面を覆う側壁（スカート）４５を必要とし、しかも剛性を持たせる必要から肉厚に成型されており、チューブ容器５０の頭部部分には多くの樹脂量を要し、容器全体として頭部が重くなることでバランスが悪く、また頭部のデッドスペースが大きいために内容積が少なくなるという問題と、固定部４６によって口頚部４３に取り付けられた閉鎖部材が使用中に外れたりあるいは取り付けが緩んで内容物が流出する問題があり、さらに肩部４２と側壁（スカート）４５との間隙から汚水や異物が入り込み、カビや雑菌等の発生する可能性が有った。
【０００３】
図３（ｂ）に示すチューブ容器６０は、略中央に注出口５４を有する上板５３とその周辺に肩部５２を有するヘッド部材に対して、栓５６を内側に有するドーム状のキャップ５５をヒンジのある一対の連結板５８とベルト５９で廻動自在に連設してなる閉鎖部材を、その肩部５２で胴部５１の一端に溶着して取り付けたもので、このチューブ容器６０は、チューブ容器本体の筒状胴部５１を閉鎖部材の肩部５２に直接取り付けることにより、前述した多くの樹脂量を要する問題と、間隙から汚水や異物が入り込むという問題は解決しているが、ヘッド部が上板５３とその周辺に肩部５２を有するだけの構造であるので剛性が不足しており、外部からの応力によって上板５３に変形が起き易く、注出口５４とヒンジキャップ固定部５６との嵌合が緩み、内容物の流出の原因となったり外観形状を損なうという問題がある。またヘッド部の剛性不足による開閉操作の不都合を生じることがあった。さらに、チューブ容器６０の頭部はドーム状である為、不使用時にチューブ容器６０を倒立して立てるいわゆるスタンディングチューブとすることが出来なかった（例えば、特許文献１参照。）。
【０００４】
【特許文献１】
実開平３−１２９２５５号公報
【０００５】
また前述の問題を解決するため、図４（ａ）および（ｂ）に示すように、略中央に注出口４を、また周辺に肩部３と接合部８を設けた上板２からなるヘッド部１０と、略中央に突出した栓部１４を有する蓋板１１と該蓋板１１周辺を取り巻く側壁１２とからなるヒンジキャップ２０とを前記上板２の所定の位置でヒンジ３３を介して連設し、該ヒンジ３３を回転軸として前記ヒンジキャップ２０を廻動可能としたポリオレフィン系樹脂からなる閉鎖部材３０を、筒状の胴部１の一端に前記接合部８において熱接着手段により接合してなるチューブ容器４０において、前記ヒンジキャップ２０の上面を平らにすることにより倒立性が付与され、また前記ヘッド部１０の内側には井桁状の補強リブ６および７を注出口１０の外側で交差して設けることにより前記ヘッド部１０に剛性が付与され、前記上板２全体の応力変形を小さくして開閉操作の不都合を解消している。しかしながら、前記ヘッド部１０の内側に設けられた井桁状の補強リブ６および７は、井桁構造内に内容物が残留し使い切ることが出来ないという欠点があった（例えば、特許文献２参照。）。
【０００６】
【特許文献２】
特開２００１−１３０６００号公報
【０００７】
【発明が解決しようとする課題】
そこで、本発明は、上記問題を解決するためになしたものであって、その目的とするところは、容器頭部に汚水や異物が入り込むことが無く、容器頭部における樹脂使用量を減少させることで容器全体の重量バランスを良くするとともに、材料コストを低減し、かつ内容物の収納空間を大きくしながら残留量を極力少なくし、また樹脂使用量を減少しながら容器頭部の剛性を十分に持たせることで軽快な開閉操作性を付与することが出来るヒンジキャップ付き閉鎖部材を有するチューブ容器を提供することにある。
【０００８】
【課題を解決するための手段】
上記課題を解決するため、請求項１の発明は、略中央に注出口を、周辺に肩部と接合部とを設けた上板からなるヘッド部と、略中央に突出した栓部を有する蓋板と該蓋板周辺を取り巻く側壁とからなるヒンジキャップとを前記上板の所定の位置でヒンジを介して連設し、前記ヒンジキャップの側壁の端部内側で前記ヒンジと対向する部分に突起を設けるとともに、該突起が嵌合する凹陥部を前記ヘッド部の上板の上面に形成した段差面に設け、前記ヒンジを回転軸として前記ヒンジキャップを廻動可能としたポリオレフィン系樹脂からなる閉鎖部材を、筒状胴部の一端に前記接合部において熱接着手段により接合してなるチューブ容器であって、前記ヘッド部の内面には前記ヒンジ部と対向する側の肩部から上板に渉る補強リブが立設されていることを特徴とするチューブ用容器で、容器頭部に汚水や異物が入り込むことが無く、容器頭部における樹脂使用量を減少させることで容器全体の重量バランスを良くするとともに、材料コストを低減し、かつ内容物の収納空間を大きくしながら残留量を極力少なくし、また樹脂使用量を減少しながら容器頭部の剛性を十分に持たせることで軽快な開閉操作性を付与することが出来るヒンジキャップ付き閉鎖部材を有するチューブ容器を提供する。
【０００９】
請求項２の発明は、前記補強リブの両側に平行して、かつ前記ヘッド部内面の周辺に近接し、前記ヒンジ部と対向する側の肩部から上板に続いてヒンジ部側の肩部に渉る２本の弦状補強リブがそれぞれ配設されていることを特徴とする請求項１記載のチューブ容器で、樹脂使用量を減少しながら容器頭部の剛性を付与し、特に正面部からの応力に対し、上板全体の応力変形を小さくすることで、注出口の軽快な開閉操作を行うとともに、ヘッド部の内面の内容物残留量を極力減少させ得るものである。
【００１０】
請求項３の発明は、前記２本の弦状補強リブに対し略中央部で直交し、かつ前記ヘッド部内面の周辺に向かって、少なくとも１本の直交補強リブがそれぞれ配設されていることを特徴とする請求項２記載のチューブ容器で、樹脂使用量を減少しながら容器頭部の剛性を付与し、正面部からの応力に対し、上板全体の応力変形を小さくすることで、注出口の軽快な開閉操作を行うとともに、左右側面からの応力に対しても上板の応力変形を小さくし、かつヘッド部の内面の内容物残留量を極力減少させ得るものである。
【００１１】
【発明の実施の形態】
上記本発明について、図面等を用いて以下に詳述する。
図１は本発明に係るチューブ容器の第１実施例の説明図。図２は同じく第１実施例の外形図。図３は従来のヒンジキャップの付いた閉鎖部材を採用したチューブ容器の説明図。図４はヒンジキャップの付いた閉鎖部材を胴部に接合した形式のチューブ容器の説明図。図５は本発明に係るチューブ容器の第２実施例の説明図。図６は本発明に係る第３実施例の説明図。
【００１２】
図１は本発明に係るチューブ容器の第１実施例の説明図で、図１（ａ）は、本発明に係るチューブ容器の閉鎖部材３０をヘッド部１０の内面側から見た展開平面図であり、図１（ｂ）は、本発明に係るチューブ容器の頭部の部分縦断面図である。いずれも製造時の状態で描かれており、使用状態では図２（ｃ）に示すようにヒンジキャップ２０が起きた状態となる。本発明に使用する閉鎖部材３０は、ヘッド部１０とヒンジキャップ２０とが、中央にヒンジ３３のある一対の連結体３１と帯状体３２を介して互いに連結されており、ヒンジキャップ２０はヘッド部１０に対して、連結体３１のヒンジ３３を軸として自由に廻動可能であり、ヘッド部１０の上面を覆う蓋としての機能を有している。ヘッド部１０は、略中央に注出口４を有し、周辺に肩部３を、さらにその外周に接合部８を有する上板２からなるものである。肩部３は、従来のチューブ容器のヘッド部に比べて小さく、従って本発明に係るチューブ容器４０の閉鎖部材３０全体の外観は従来の閉鎖部材よりフラットな形状を呈する。注出口４は、上板２の略中心部に設けられているが、注出時の使い勝手を良くし、ヒンジキャップ２０の栓部１４との嵌合を容易にするために、連結体３１から離れるよう偏心して設けても良い。ヘッド部１０には、正面側の肩部３から上板２に渉る内面に、平行する補強リブ６および７が立設されている。該補強リブ６および７は開閉操作時に加えられるヘッド部１０への正面側からの応力に対し、剛性を付与するもので、上板２全体の応力変形を小さくすることが出来、注出口４の軽快な開閉操作を行うことができ、かつヘッド部１０の内面の内容物残留量を極力減少させ得るものである。
【００１３】
一方、ヒンジキャップ２０は、平らな蓋板１１とその周辺を取り巻く側壁（スカート）１２からなり、その略中央部には突出した栓部１４が設けられている。また、栓部１４の先端部には環状ビート１５が設けられ、注出口４の内壁の嵌合部５との嵌合をより完全なものとしている。ヒンジキャップ２０の側壁（スカート）１２の端部内側で回転半径の最も大きな部分には突起１６が形成され、この突起１６が、ヘッド部１０の上板２の上面に形成された段差面Ｄの凹陥部９に嵌合することにより、ヒンジキャップ２０は上板２上に確実に係止される。この場合の嵌合は、側壁１２が段差面Ｄの外側に隣接する状態で行われるので、以下外嵌合と称する。このように本発明に係るチューブ容器３０では、注出口４と栓部１４とによる第１の係止機能に加えて、側壁（スカート）１２の突起１６と段差面Ｄの凹陥部９による第２の係止機能を備えることによって、従来起こりがちであった不用意な内容物の漏れを未然に防止することができる。また、蓋板１１のヒンジ３３を回転軸とする回転半径の最も大きな部分にヒンジキャップ２０を開き易くする突出片１３が設けられている。
【００１４】
本発明に係るチューブ容器における胴部１と閉鎖部材３０の接合は、図１（ｂ）の接合箇所Ｓに示すように、胴部１の端部内面とヘッド部１０の接合部８の外面間で、熱接着手段によって行われているが、これに限定されることはなく、胴部１の端部外面とヘッド部１０の接合部８の内面間、あるいは予めヘッド部１０の接合部８の端縁に溝状の凹陥部を設け該凹陥部に胴部１の端部を装着して熱接着を行ってもよい。熱接着手段は、インモールド射出成型法、ホットエアー加熱、高周波加熱、超音波加熱、ヒートシールなどの方法を用いることができるが、インモールド射出成型法が最も効果的に用いられ、閉鎖部材３０の射出成型用の金型内に胴部１の一端を挿入することによって、閉鎖部材３０が成型されると同時に、閉鎖部材３０に胴部１が一体的に融着された状態で金型から取り出すことができる。すなわち、閉鎖部材３０を成型するキャビティ側がすべて型締めされた状態において、予め筒状に成型された胴部１を、先端部がヘッド部１０を射出成型するためのコアとなっているマンドレルに差し込んだ状態で、キャビティ内に所定の位置まで進入させて型締めを完了させ、溶融樹脂を金型内に射出し、金型内で胴部１の端部と溶融樹脂を融着一体化することができる。インモールド射出成型による熱接着方法は、他の熱接着方法のように予め成型された閉鎖部材３０を胴部１と接合するものでは無いため、製造工程の短縮が図れ、かつ接合箇所Ｓの仕上がりが美麗で、コスメティック商品、トイレタリー商品等のチューブ容器として適している。
【００１５】
図２は、本発明に係るチューブ容器の第１実施例の、外形の説明図である。図２（ａ）は、閉鎖部材３０の閉鎖時の側面図。図２（ｂ）は、閉鎖部材３０が閉鎖時の平面図（充填時の底部シールがなされていない空のチューブ容器の状態）。図２（ｃ）は、開封時の側面図である。図２（ａ）に示すように、ヒンジキャップ２０の表面（閉鎖された閉鎖部材のトップ面）は平らに成型されているので、チューブ容器４０による商品は倒立性（頭部を下にした時の自立性）を有し、店頭における展示陳列時および使用場所での不使用時には、倒立させて置くことができる。さらに蓋板１１の中央部を僅かに凹面化させることで、自立を安定化することができる。また図２（ａ）、（ｃ）に示すように、ヒンジキャップ２０の指先での開放操作のため、ヒンジキャップ２０に突出片１３を設け、さらに閉鎖部材３０の閉鎖時における突出片１３の下部にあたる肩部３の一部を、他の部分より内側に削った略平面部Ｈを形成し、指が突出片１３に掛かり易くしている。また図２（ｂ）に示すのは、内容物を充填する前のチューブ容器４０の平面図であるが、閉鎖部材３０の周辺から胴部１の外径を超えて突出する部分が無いので、成型後の印刷機、充填機等への供給、箱詰め等への移送および整列をスムーズに行うことができる。
【００１６】
閉鎖部材３０は、図１に示すように、ヘッド部１０とヒンジキャップ２０とが１８０度開いたフラットな形状で成型され（射出成型が好ましい）、金型から取り出され、直後にヒンジ３３で折り曲げ癖付けされることにより、以降は図２（Ｃ）に示すように、ヒンジキャップ２０がヘッド部１０の上板２に対して略１３５度開いた位置で止まるようになる。前記角度は、ヒンジ３３を有する連結体３１と帯状体３２からなる連結部の設計により変えることができる。
【００１７】
図５は本発明に係るチューブ容器の第２実施例の説明図で、図５（ａ）は、本発明に係るチューブ容器の閉鎖部材３０をヘッド部１０の内面側から見た展開平面図であり、図５（ｂ）は、本発明に係るチューブ容器の頭部の部分縦断面図である。いずれも製造時の状態で描かれており、使用状態では図２（ｃ）に示すようにヒンジキャップ２０が起きた状態となる。本発明に使用する閉鎖部材３０は、ヘッド部１０とヒンジキャップ２０とが、中央にヒンジ３３のある一対の連結体３１と帯状体３２を介して互いに連結されており、ヒンジキャップ２０はヘッド部１０に対して、連結体３１のヒンジ３３を軸として自由に廻動可能であり、ヘッド部１０の上面を覆う蓋としての機能を有している。ヘッド部１０は、略中央に注出口４を有し、周辺に肩部３を、さらにその外周に接合部８を有する上板２からなるものである。肩部３は、従来のチューブ容器のヘッド部に比べて小さく、従って本発明に係るチューブ容器４０の閉鎖部材３０全体の外観は従来の閉鎖部材よりフラットな形状を呈する。注出口４は、上板２の略中心部に設けられているが、注出時の使い勝手を良くし、ヒンジキャップ２０の栓部１４との嵌合を容易にするために、連結体３１から離れるよう偏心して設けても良い。ヘッド部１０には、正面側の肩部３から上板２に渉る内面に、平行する補強リブ６および７が立設されている。さらに、前記補強リブ６および７の両側に平行して、かつ前記ヘッド部１０内面の周辺に近接する位置に、前記ヒンジ３３と対向する側の肩部３から上板２に続いてヒンジ３３側の肩部３に渉る２本の弦状補強リブＱ、Ｑ´がそれぞれ配設されている。前記補強リブ６および７は開閉操作時に加えられるヘッド部１０への正面側からの応力に対し剛性を付与し、さらに前記弦状補強リブＱ、Ｑ´が上板２全体の応力変形を小さくすることで、上板２の薄肉化に拘わらず、注出口４の軽快な開閉操作を行うことができ、かつ前記弦状補強リブＱ、Ｑ´をヘッド部１０内面の周辺に近接する位置に配設したことで、ヘッド部１０の内面の内容物残留量を極力減少させ得るものである。尚、ヒンジキャップ２０および、胴部１と閉鎖部材３０の接合に関しては、前述の第１実施例と同様であるので省略する。
【００１８】
図６は本発明に係るチューブ容器の第３実施例の説明図で、図６（ａ）は、本発明に係るチューブ容器の閉鎖部材３０をヘッド部１０の内面側から見た展開平面図であり、図６（ｂ）は、本発明に係るチューブ容器の頭部の部分縦断面図である。いずれも製造時の状態で描かれており、使用状態では図２（ｃ）に示すようにヒンジキャップ２０が起きた状態となる。本発明に使用する閉鎖部材３０は、ヘッド部１０とヒンジキャップ２０とが、中央にヒンジ３３のある一対の連結体３１と帯状体３２を介して互いに連結されており、ヒンジキャップ２０はヘッド部１０に対して、連結体３１のヒンジ３３を軸として自由に廻動可能であり、ヘッド部１０の上面を覆う蓋としての機能を有している。ヘッド部１０は、略中央に注出口４を有し、周辺に肩部３を、さらにその外周に接合部８を有する上板２からなるものである。肩部３は、従来のチューブ容器のヘッド部に比べて小さく、従って本発明に係るチューブ容器４０の閉鎖部材３０全体の外観は従来の閉鎖部材よりフラットな形状を呈する。注出口４は、上板２の略中心部に設けられているが、注出時の使い勝手を良くし、ヒンジキャップ２０の栓部１４との嵌合を容易にするために、連結体３１から離れるよう偏心して設けても良い。ヘッド部１０には、正面側の肩部３から上板２に渉る内面に、平行する補強リブ６および７が立設されている。さらに、前記補強リブ６および７の両側に平行して、かつ前記ヘッド部１０内面の周辺に近接する位置に、前記ヒンジ３３と対向する側の肩部３から上板２に続いてヒンジ３３側の肩部３に渉る２本の弦状補強リブＱ、Ｑ´がそれぞれ配設されるとともに、該弦状補強リブＱ、Ｑ´の略中央部で直交し、かつ前記ヘッド部１０内面の周辺に向かう平行の直交補強リブＲがそれぞれ立設されている。直交補強リブＲはヘッド部１０への左右側からの応力に対し剛性を付与し、上板２全体の応力変形を小さくすることができる。さらに弦状補強リブＱ、Ｑ´に直交しヘッド部１０内面の周辺に向かう位置に立設したのでヘッド部１０の内面の内容物残量を極力減少させ得る効果を損なわない。尚、ヒンジキャップ２０および、胴部１と閉鎖部材３０の接合に関しては、前述の第１実施例と同様であるので省略する。
【００１９】
本発明に係るチューブ容器の各々の実施例と、従来技術であるヘッド部内面に井桁状の補強リブを設けた例との、ヘッド部１０内部の内容物残留量の比較試験を行った結果、下記のような結果を得ることができた。尚、試験方法としては、チューブ容器に内容物（頭髪用化粧材）１００グラムを充填し、開栓して内容物を排出後、閉鎖部材３０部分のみを切り取って、残留した内容物重量を測定したものである。

この結果、従来技術の井桁状補強リブを設けたものに比較して、第１実施例では６７％強、第２実施例では４２％強、第３実施例では４０％の内容物残留量の減少を得ることができた。
【００２０】
本発明に係るチューブ容器に使用される素材について説明を行う。まず、閉鎖部材３０の素材としてポリオレフィン系樹脂が使用されるが、前述の如く閉鎖部材３０はヒンジ機能を伴い、ヒンジ部には適度な弾性と耐折強度が必要で、またスムーズな開閉操作のための嵌合機能を持たせるには、適度な硬度を持たせる必要もあり、ポリプロピレン系樹脂の使用が望ましい。尚、射出成型の金型内における溶融樹脂が極めて狭いヒンジ部を通過して、短時間で金型内に拡がる必要があり、流動特性に優れた樹脂の使用が好ましい。一方、胴部１には種々の積層構成からなる積層材が用いられるが、少なくとも閉鎖部材３０との接着面側には、閉鎖部材３０に使用されるポリオレフィン系樹脂に対して良好な濡れ、相溶性、熱接着性を示す接着性ポリオレフィン系樹脂層か、あるいは閉鎖部材３０と同系材質の樹脂層が形成されていることが好ましい。接着性ポリオレフィン系樹脂は、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂を変性したもので、溶融表面張力の極めて小さな、官能基を有する樹脂であって、この樹脂を介在させることによって、閉鎖部材３０のポリオレフィン系樹脂と胴部１間の熱接着手段による接合を極めて強力に行うことができる。一般に、接着性ポリオレフィン系樹脂は、多層押し出し法による積層材の製造にあたって、互いに接着性の良くない樹脂間にいわゆるタイレイヤー（以下ＴＩＥで示す。）として設けられ、モディック（三菱化学（株）製）、アドマー（三井化学（株）製）によって代表されるものであって、本発明に係るチューブ容器の胴部１を多層押し出し方式で製造する場合にも、外面ばかりでなく内面にもタイレイヤー（ＴＩＥ）として使用可能である。閉鎖部材３０のポリオレフィン系樹脂と胴部１の接合面の樹脂の組み合わせは、ＬＤＰＥ、ＬＬＤＰＥ（直鎖状低密度ポリエチレン）、ＰＰ、ポリオレフィン系のポリマーアロイ（いかなる手段でポリマーアロイ化されたものでも良い）等の中から、閉鎖部材３０の成形性、硬度、ヒンジ特性、接着性すなわち接合のための熱接着手段とそれによって得られる接着強度、胴部の絞り適性（柔軟性、反復性等）等を十分に勘案して定めれば良い。
【００２１】
前述の積層材からなる胴部１は、円形のダイスから多層押し出し方式によってチューブ状に押し出し所定の長さにカットする方法か、所定の幅と厚みを有する長尺のラミネートシートを筒貼りしてスリーブ状とし所定の長さにカットする方法か、あるいは短冊状のラミネートシートを筒貼りしてスリーブ状とする方法で製造することができる。多層押し出し方式によってチューブ状とする場合は、胴部１に継ぎ目の無い美しい仕上がりになるが、使用できる樹脂素材に限界がある。ラミネートシートからスリーブ状とする場合は、生産性が高く、印刷加工の自由度も大きい。またバリア層としてアルミ箔層、シリカ蒸着層等も適宜設けることができ、積層構成の範囲は極めて広くなる反面、胴部１の筒貼り部分が外観を損ない、筒貼り部が断面の厚み精度を損なって、閉鎖部材３０との熱接着手段によっては適合しにくい場合がある。したがって、内容物、使用用途、要求される美粧性等を勘案して、胴部１の積層構成、接合箇所Ｓの接合方法、熱接着方法等の最適な組み合わせを選定することが好ましい。
【００２２】
本発明に係るチューブ容器は、前述の記載あるいは図面に限定されることなく、本発明の要旨を逸脱しない範囲内で種々の変形が可能である。例えば、本発明に係るチューブ容器の平面視における形状は、円形だけでなく楕円形であってもよい。また閉鎖部材におけるヘッド部とヒンジキャップ部の連結機構は、実施例のいわゆる三点ヒンジに限定されることはなく、いかなる種類のものであってもよい。さらに、閉鎖部材における注出口と栓部の嵌合方式は、実施例の嵌合方式以外にもクッション材を介在させる等のいかなる方式を用いてもよい。
【００２３】
【発明の効果】
本発明に係るチューブ容器は、ヘッド部の内面のヒンジ部と対向する側の肩部から上板に渉る補強リブを立設することにより、開閉操作時に加えられるヘッド部への正面側からの応力に対し剛性を付与し、上板全体の応力変形を小さくすることで、注出口の軽快な開閉操作を行うことができ、材料コストを低減し、かつ内容物収納空間を大きくしながら残留量を極力少なくすることができる。
【００２４】
前記補強リブの両側に平行して、かつヘッド部内面の周辺に近接し、ヒンジ部と対向する側の肩部から上板に続いてヒンジ部側の肩部に渉る２本の弦状補強リブがそれぞれ配設されることにより、ヘッド部正面側からの応力に対しさらに剛性を付与するとともに、左右側からの応力に対しても剛性を付与して、上板全体の応力変形を小さくすることで、注出口の軽快な開閉操作を行うことができ、さらに前記弦状補強リブに対し略中央部で直交し、かつ前記ヘッド部内面の周辺に向かって、少なくとも１本の直交補強リブがそれぞれ配設されることにより、ヘッド部左右側からの応力に対しさらに剛性を付与することができ、材料コストを低減し、かつ内容物収納空間を大きくしながら残留量を極力少なくするチューブ容器を提供することができる。
【図面の簡単な説明】
【図１】本発明に係るチューブ容器の第１実施例の説明図。
【図２】同じく第１実施例の外形図。
【図３】従来のヒンジキャップの付いた閉鎖部材を採用したチューブ容器の説明図。
【図４】ヒンジキャップの付いた閉鎖部材を胴部に接合した形式のチューブ容器の説明図。
【図５】本発明に係るチューブ容器の第２実施例の説明図。
【図６】本発明に係るチューブ容器の第３実施例の説明図。
【符号の説明】
１胴部
２上板
３肩部
４注出口
５嵌合部
６、７リブ
８接合部
９凹陥部
１０ヘッド部
１１蓋板
１２側壁（スカート）
１３突出片
１４栓部
１５環状ビート
１６突起
２０ヒンジキャップ
３０閉鎖部材
３１連結体
３２帯状体
３３ヒンジ
４０本発明に係るチューブ容器
Ｃ注出口
Ｄ段差
Ｈ平面部
Ｓ接合箇所
Ｐ栓
Ｑ、Ｑ´ 弦状補強リブ
Ｒ直交補強リブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tube container in which a closure member with a snap-type hinge cap is attached to one end of a cylindrical body.
[0002]
[Prior art]
Closures with snap-on hinge caps have been developed for plastic molded bottles and are also used for plastic extruded tube containers. FIG. 3 is an explanatory view of a tube container employing a closing member with a conventional hinge cap. As shown in FIG. 3 (a), a typical tube container 50 employing a closing member with a conventional hinge cap has a tube container main body shown by hatching as a cylindrical body 41 and a shoulder 42. The mouth and neck portion 43 is formed by attaching a closing member to the mouth and neck portion 43 by screwing or fitting. The closing member has a plug P protruding substantially in the center with respect to the head portion having a side wall (also referred to as a skirt) 45 around the upper plate 44 having the spout C at the substantially center (in many cases, slightly eccentric). A hinge cap composed of a lid plate 49 having a side wall and a side wall (skirt) 45 'surrounding the periphery of the lid plate 49 is connected by a pair of connecting bodies 47 and one band 48, and the hinge of the connecting body 47 is used as a rotation axis. Is possible. In such a tube container 50, the shape of the extruded tube container main body or the bottle main body used by attaching a conventional screw cap is used as it is, while the closing member is also fixed to the mouth / neck portion of the tube container main body, It requires a side wall (skirt) 45 that covers the side of the head, and is molded to be thick because of the need for rigidity. The head portion of the tube container 50 requires a large amount of resin, and the entire container has a head. The problem is that the balance is poor due to the heavy part and the internal space is reduced due to the large dead space of the head, and the closure member attached to the mouth and neck part 43 by the fixing part 46 is detached or attached during use. Has a problem that the contents are loosened and the contents flow out, and further, sewage and foreign matter enter from the gap between the shoulder 42 and the side wall (skirt) 45, There was likely to occur, such as a bi or bacteria.
[0003]
A tube container 60 shown in FIG. 3B has a dome-like cap 55 having a plug 56 on the inner side of an upper plate 53 having a spout 54 at the center and a head member having a shoulder 52 at the periphery thereof. A tube member 60 is formed by welding a closing member, which is connected to a pair of hinged connecting plates 58 and a belt 59 so as to be rotatable, by welding to one end of a body portion 51 at a shoulder portion 52 thereof. By directly attaching the cylindrical body portion 51 of the tube container body to the shoulder portion 52 of the closing member, the above-described problem of requiring a large amount of resin and the problem of sewage and foreign matter entering through the gap are solved. Since the portion has a structure having only the upper plate 53 and the shoulder portion 52 around the upper plate 53, the rigidity is insufficient, and the upper plate 53 is easily deformed by external stress, and the spout 54 and the hinge cap fixing portion 56 are formed. Mating with Loose, there is a problem that detract from the appearance shape or caused the outflow of the contents. In addition, the opening / closing operation may be inconvenient due to insufficient rigidity of the head portion. Furthermore, since the head portion of the tube container 60 has a dome shape, a so-called standing tube in which the tube container 60 is turned upside down when not in use cannot be formed (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 3-129255
[0005]
In order to solve the above-mentioned problem, as shown in FIGS. 4A and 4B, a head composed of an upper plate 2 provided with a spout 4 at the substantially center and a shoulder 3 and a joint 8 at the periphery. A hinge cap 20 comprising a portion 10, a cover plate 11 having a plug portion 14 protruding substantially in the center, and a side wall 12 surrounding the periphery of the cover plate 11 is connected via a hinge 33 at a predetermined position of the upper plate 2. A closing member 30 made of a polyolefin-based resin that allows the hinge cap 20 to be rotated about the hinge 33 as a rotation axis is joined to one end of the cylindrical body portion 1 at the joining portion 8 by heat bonding means. In the tube container 40 formed as described above, inversion is imparted by flattening the upper surface of the hinge cap 20, and cross-shaped reinforcing

ribs

6 and 7 are crossed outside the spout 10 inside the head portion 10. Provide The head portion 10 rigidity be imparted to, and eliminate a disadvantage of the opening and closing operation by reducing the stress deformation of the upper plate 2 as a whole by the. However, the cross-girder-

shaped reinforcing ribs

6 and 7 provided on the inner side of the head portion 10 have a drawback that the contents remain in the cross-girder structure and cannot be used up (see, for example, Patent Document 2). .
[0006]
[Patent Document 2]
JP 2001-130600 A
[0007]
[Problems to be solved by the invention]
Therefore, the present invention has been made to solve the above problems, and the object of the present invention is to reduce the amount of resin used in the container head without causing sewage or foreign matter to enter the container head. This improves the overall weight balance of the container, reduces material costs, increases the content storage space while minimizing the residual amount, and reduces the amount of resin used while ensuring sufficient rigidity of the container head. An object of the present invention is to provide a tube container having a closure member with a hinge cap that can be provided with a light opening and closing operability.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 is a lid having a head portion formed of an upper plate having a spout at a substantially central portion, a shoulder portion and a joint portion at a periphery thereof, and a plug portion projecting at a substantially central portion. A hinge cap composed of a plate and a side wall surrounding the periphery of the lid plate is connected via a hinge at a predetermined position of the upper plate, and protrudes at a portion facing the hinge inside the end of the side wall of the hinge cap And a recess made of a polyolefin-based resin that allows the hinge cap to be rotated about the hinge as a rotation shaft. A tube container in which a member is joined to one end of a cylindrical body portion by thermal bonding means at the joint portion, and the inner surface of the head portion is hung from a shoulder portion on the side facing the hinge portion to an upper plate. Reinforcing ribs are erected The tube container is characterized by the fact that sewage and foreign matter do not enter the container head, reducing the amount of resin used in the container head, improving the overall weight balance of the container and reducing the material cost. In addition, it is possible to give light opening and closing operability by increasing the storage space of the contents while minimizing the residual amount, and by giving sufficient rigidity to the container head while reducing the amount of resin used. A tube container having a closure member with a hinge cap is provided.
[0009]
According to a second aspect of the present invention, there is provided a shoulder portion on the hinge portion side in parallel to both sides of the reinforcing rib and in proximity to the periphery of the inner surface of the head portion and from the shoulder portion on the side facing the hinge portion to the upper plate. 2. The tube container according to claim 1, wherein two string-like reinforcing ribs are provided respectively, and the rigidity of the container head is given while reducing the amount of resin used. By reducing the stress deformation of the entire upper plate with respect to the stress from, the opening and closing operation of the spout can be performed and the residual content of the inner surface of the head portion can be reduced as much as possible.
[0010]
According to a third aspect of the present invention, at least one orthogonal reinforcing rib is disposed substantially perpendicular to the two string-like reinforcing ribs at a central portion and toward the periphery of the inner surface of the head portion. The tube container according to claim 2, wherein the rigidity of the container head is imparted while reducing the amount of resin used, and the stress deformation of the entire upper plate is reduced with respect to the stress from the front part. While performing easy opening and closing operation of the outlet, it is possible to reduce the stress deformation of the upper plate against the stress from the left and right side surfaces, and to reduce the residual content of the inner surface of the head portion as much as possible.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below with reference to the drawings.
FIG. 1 is an explanatory view of a first embodiment of a tube container according to the present invention. FIG. 2 is an external view of the first embodiment. FIG. 3 is an explanatory view of a conventional tube container employing a closing member with a hinge cap. FIG. 4 is an explanatory view of a tube container of a type in which a closing member with a hinge cap is joined to a trunk portion. FIG. 5 is an explanatory view of a second embodiment of the tube container according to the present invention. FIG. 6 is an explanatory diagram of a third embodiment according to the present invention.
[0012]
FIG. 1 is an explanatory view of a first embodiment of a tube container according to the present invention, and FIG. 1A is a developed plan view of the closure member 30 of the tube container according to the present invention as viewed from the inner surface side of the head portion 10. FIG. 1B is a partial longitudinal sectional view of the head portion of the tube container according to the present invention. Both are drawn in the state at the time of manufacture, and in the state of use, the hinge cap 20 is raised as shown in FIG. In the closing member 30 used in the present invention, the head portion 10 and the hinge cap 20 are connected to each other via a pair of connecting bodies 31 having a hinge 33 in the center and a belt-like body 32. The hinge cap 20 is connected to the head portion. 10 can be freely rotated around the hinge 33 of the coupling body 31 as an axis, and has a function as a lid that covers the upper surface of the head portion 10. The head portion 10 is composed of an upper plate 2 having a spout 4 at substantially the center, a shoulder 3 at the periphery, and a joint 8 at the outer periphery thereof. The shoulder portion 3 is smaller than the head portion of the conventional tube container, and therefore the appearance of the entire closing member 30 of the tube container 40 according to the present invention is flatter than that of the conventional closing member. The spout 4 is provided at the substantially central portion of the upper plate 2. However, in order to improve usability during pouring and to facilitate fitting with the plug portion 14 of the hinge cap 20, the spout 4 is provided from the coupling body 31. You may provide eccentrically so that it may leave | separate. In the head portion 10, parallel reinforcing

ribs

6 and 7 are erected on the inner surface extending from the front shoulder portion 3 to the upper plate 2. The reinforcing

ribs

6 and 7 give rigidity to the stress from the front side applied to the head portion 10 applied at the time of opening / closing operation, and can reduce the stress deformation of the entire upper plate 2. A light opening and closing operation can be performed, and the remaining amount of contents on the inner surface of the head portion 10 can be reduced as much as possible.
[0013]
On the other hand, the hinge cap 20 includes a flat lid plate 11 and a side wall (skirt) 12 surrounding the periphery thereof, and a protruding plug portion 14 is provided at a substantially central portion thereof. Further, an annular beat 15 is provided at the distal end portion of the plug portion 14 so that the fitting with the fitting portion 5 on the inner wall of the spout 4 is made more complete. A protrusion 16 is formed on the innermost end portion of the side wall (skirt) 12 of the hinge cap 20 at the portion with the largest turning radius, and this protrusion 16 is formed on the step surface D formed on the upper surface of the upper plate 2 of the head portion 10. By fitting into the recessed portion 9, the hinge cap 20 is securely locked onto the upper plate 2. Since the fitting in this case is performed in a state where the side wall 12 is adjacent to the outside of the step surface D, it is hereinafter referred to as an outer fitting. Thus, in the tube container 30 according to the present invention, in addition to the first locking function by the spout 4 and the plug portion 14, the second by the projection 16 of the side wall (skirt) 12 and the recessed portion 9 of the step surface D. By providing such a locking function, it is possible to prevent inadvertent leakage of contents that tend to occur in the past. In addition, a protruding piece 13 that makes it easy to open the hinge cap 20 is provided at a portion having the largest rotation radius with the hinge 33 of the lid plate 11 as the rotation axis.
[0014]
In the tube container according to the present invention, the barrel 1 and the closing member 30 are joined between the inner surface of the end portion of the barrel portion 1 and the outer surface of the joint portion 8 of the head portion 10, as shown in the joint portion S of FIG. However, the present invention is not limited to this, and is not limited to this. Between the outer surface of the end portion of the body portion 1 and the inner surface of the joint portion 8 of the head portion 10, or the joint portion 8 of the head portion 10 in advance. A groove-like concave portion may be provided at the end edge, and the end portion of the body portion 1 may be attached to the concave portion to perform thermal bonding. As the heat bonding means, an in-mold injection molding method, hot air heating, high-frequency heating, ultrasonic heating, heat sealing, or the like can be used, but the in-mold injection molding method is most effectively used, and the closing member 30 is used. By inserting one end of the body part 1 into the injection mold, the closing member 30 is molded, and at the same time, the body part 1 is integrally fused to the closing member 30 from the mold. It can be taken out. That is, in a state where all the cavities for molding the closing member 30 are clamped, the barrel 1 molded in advance in a cylindrical shape is inserted into a mandrel whose tip is a core for injection molding of the head 10. In this state, the mold is clamped by entering the cavity to a predetermined position, the molten resin is injected into the mold, and the end of the body 1 and the molten resin are fused and integrated in the mold. Can do. The thermal bonding method by in-mold injection molding does not join the closure member 30 that has been molded in advance with the body 1 unlike other thermal bonding methods, so that the manufacturing process can be shortened and the joint S is finished. Is beautiful and suitable as a tube container for cosmetics and toiletries.
[0015]
FIG. 2 is an explanatory view of the outer shape of the first embodiment of the tube container according to the present invention. FIG. 2A is a side view when the closing member 30 is closed. FIG. 2B is a plan view when the closing member 30 is closed (a state of an empty tube container that is not sealed at the bottom during filling). FIG.2 (c) is a side view at the time of opening. As shown in FIG. 2A, the surface of the hinge cap 20 (the top surface of the closed closure member) is molded flat, so that the product by the tube container 40 is inverted (when the head is turned down). It can be placed upside down when it is displayed at a store and when not in use. Furthermore, the independence can be stabilized by making the central portion of the cover plate 11 slightly concave. Further, as shown in FIGS. 2A and 2C, a protruding piece 13 is provided on the hinge cap 20 for the opening operation with the fingertip of the hinge cap 20, and a lower portion of the protruding piece 13 when the closing member 30 is closed. A substantially flat portion H is formed by cutting a portion of the shoulder portion 3 corresponding to the inner side of the other portion, so that the finger can easily get on the protruding piece 13. 2B is a plan view of the tube container 40 before filling the contents, but there is no portion protruding beyond the outer diameter of the body 1 from the periphery of the closing member 30. Supply to a printing machine, a filling machine, etc. after molding, transfer to boxing, etc. and alignment can be performed smoothly.
[0016]
As shown in FIG. 1, the closing member 30 is molded in a flat shape in which the head portion 10 and the hinge cap 20 are opened 180 degrees (preferably injection molding), taken out from the mold, and immediately bent by a hinge 33. By being brazed, as shown in FIG. 2C, the hinge cap 20 stops at a position where the hinge cap 20 is opened approximately 135 degrees with respect to the upper plate 2 of the head unit 10 thereafter. The angle can be changed according to the design of the connecting portion including the connecting body 31 having the hinge 33 and the belt-like body 32.
[0017]
FIG. 5 is an explanatory view of a second embodiment of the tube container according to the present invention, and FIG. 5A is a developed plan view of the closure member 30 of the tube container according to the present invention as viewed from the inner surface side of the head portion 10. FIG. 5B is a partial longitudinal sectional view of the head portion of the tube container according to the present invention. Both are drawn in the state at the time of manufacture, and in the state of use, the hinge cap 20 is raised as shown in FIG. In the closing member 30 used in the present invention, the head portion 10 and the hinge cap 20 are connected to each other via a pair of connecting bodies 31 having a hinge 33 in the center and a belt-like body 32. The hinge cap 20 is connected to the head portion. 10 can be freely rotated around the hinge 33 of the coupling body 31 as an axis, and has a function as a lid that covers the upper surface of the head portion 10. The head portion 10 is composed of an upper plate 2 having a spout 4 at substantially the center, a shoulder 3 at the periphery, and a joint 8 at the outer periphery thereof. The shoulder portion 3 is smaller than the head portion of the conventional tube container, and therefore the appearance of the entire closing member 30 of the tube container 40 according to the present invention is flatter than that of the conventional closing member. The spout 4 is provided at the substantially central portion of the upper plate 2. However, in order to improve usability during pouring and to facilitate fitting with the plug portion 14 of the hinge cap 20, the spout 4 is provided from the coupling body 31. You may provide eccentrically so that it may leave | separate. In the head portion 10, parallel reinforcing

ribs

6 and 7 are erected on the inner surface extending from the front shoulder portion 3 to the upper plate 2. Further, in a position parallel to both sides of the reinforcing

ribs

6 and 7 and close to the periphery of the inner surface of the head portion 10, the shoulder portion 3 on the side facing the hinge 33 and the upper plate 2 are followed by the hinge 33 side. Two string-like reinforcing ribs Q and Q 'are disposed on the shoulder portion 3 of the belt. The reinforcing

ribs

6 and 7 give rigidity to the stress from the front side applied to the head portion 10 during opening / closing operation, and the string-like reinforcing ribs Q and Q ′ further reduce stress deformation of the entire upper plate 2. Thus, the spout 4 can be easily opened and closed regardless of the thinning of the upper plate 2 and the string-like reinforcing ribs Q and Q ′ are arranged in the vicinity of the inner surface of the head portion 10. By providing, the residual amount of contents on the inner surface of the head portion 10 can be reduced as much as possible. In addition, since it is the same as that of the above-mentioned 1st Example regarding the hinge cap 20, and the trunk | drum 1 and the closure member 30, it abbreviate | omits.
[0018]
FIG. 6 is an explanatory view of a third embodiment of the tube container according to the present invention, and FIG. 6A is a developed plan view of the closure member 30 of the tube container according to the present invention as viewed from the inner surface side of the head portion 10. FIG. 6B is a partial longitudinal sectional view of the head portion of the tube container according to the present invention. Both are drawn in the state at the time of manufacture, and in the state of use, the hinge cap 20 is raised as shown in FIG. In the closing member 30 used in the present invention, the head portion 10 and the hinge cap 20 are connected to each other via a pair of connecting bodies 31 having a hinge 33 in the center and a belt-like body 32. The hinge cap 20 is connected to the head portion. 10 can be freely rotated around the hinge 33 of the coupling body 31 as an axis, and has a function as a lid that covers the upper surface of the head portion 10. The head portion 10 is composed of an upper plate 2 having a spout 4 at substantially the center, a shoulder 3 at the periphery, and a joint 8 at the outer periphery thereof. The shoulder portion 3 is smaller than the head portion of the conventional tube container, and therefore the appearance of the entire closing member 30 of the tube container 40 according to the present invention is flatter than that of the conventional closing member. The spout 4 is provided at the substantially central portion of the upper plate 2. However, in order to improve usability during pouring and to facilitate fitting with the plug portion 14 of the hinge cap 20, the spout 4 is provided from the coupling body 31. You may provide eccentrically so that it may leave | separate. In the head portion 10, parallel reinforcing

ribs

6 and 7 and close to the periphery of the inner surface of the head portion 10, the shoulder portion 3 on the side facing the hinge 33 and the upper plate 2 are followed by the hinge 33 side. The two string-shaped reinforcing ribs Q and Q ′ that interfere with the shoulder 3 of the head are respectively disposed, and are orthogonal to each other at substantially the center of the string-shaped reinforcing ribs Q and Q ′, and on the inner surface of the head portion 10. Parallel orthogonal reinforcing ribs R extending to the periphery are provided upright. The orthogonal reinforcing rib R can give rigidity to the stress from the left and right sides to the head portion 10 and can reduce the stress deformation of the entire upper plate 2. Furthermore, since it is erected at a position that is perpendicular to the string-shaped reinforcing ribs Q and Q ′ and goes to the periphery of the inner surface of the head portion 10, the effect of reducing the content remaining on the inner surface of the head portion 10 as much as possible is not impaired. In addition, since it is the same as that of the above-mentioned 1st Example regarding the hinge cap 20, and the trunk | drum 1 and the closure member 30, it abbreviate | omits.
[0019]
As a result of conducting a comparative test of the residual amount of contents inside the head portion 10 between each example of the tube container according to the present invention and an example in which a cross-shaped reinforcing rib is provided on the inner surface of the head portion, which is a conventional technique, The following results were obtained. As a test method, the tube container was filled with 100 g of contents (hair cosmetic material), opened and discharged, and then only 30 parts of the closing member were cut out to measure the weight of the remaining contents. It is a thing.

As a result, compared with the conventional rib-shaped reinforcing rib, 67% in the first embodiment, 42% in the second embodiment, and 40% in the third embodiment. A reduction could be obtained.
[0020]
The material used for the tube container according to the present invention will be described. First, a polyolefin-based resin is used as a material of the closing member 30. As described above, the closing member 30 has a hinge function, and the hinge portion needs an appropriate elasticity and bending resistance, and can be smoothly opened and closed. In order to have a fitting function for this purpose, it is necessary to have an appropriate hardness, and it is desirable to use a polypropylene resin. Note that the molten resin in the injection mold needs to pass through a very narrow hinge portion and spread in the mold in a short time, and it is preferable to use a resin having excellent flow characteristics. On the other hand, laminated materials having various laminated structures are used for the body portion 1, and at least on the adhesive surface side with the closing member 30, good wetting and compatibility with the polyolefin-based resin used for the closing member 30. It is preferable that an adhesive polyolefin-based resin layer exhibiting solubility and thermal adhesiveness or a resin layer of the same material as the closing member 30 is formed. The adhesive polyolefin-based resin is a modified polyolefin-based resin such as polyethylene and polypropylene, and is a resin having a functional group having an extremely low melt surface tension. By interposing this resin, the polyolefin of the closing member 30 Bonding between the resin and the body portion 1 by means of heat bonding can be performed extremely strongly. In general, an adhesive polyolefin-based resin is provided as a so-called tie layer (hereinafter referred to as TIE) between resins having poor adhesion in the production of a laminated material by a multilayer extrusion method, and is manufactured by Modic (Mitsubishi Chemical Corporation). ), Represented by Admer (Mitsui Chemicals Co., Ltd.), and when the body 1 of the tube container according to the present invention is manufactured by a multi-layer extrusion method, not only the outer surface but also the inner layer (TIE) can be used. The combination of the polyolefin-based resin of the closing member 30 and the resin of the joint surface of the body portion 1 is LDPE, LLDPE (linear low density polyethylene), PP, polyolefin-based polymer alloy (which is polymer-alloyed by any means). The moldability of the closure member 30, hardness, hinge characteristics, adhesiveness, that is, the thermal bonding means for joining and the resulting adhesive strength, the drawability of the body (flexibility, repeatability, etc.) This should be determined with sufficient consideration.
[0021]
The body 1 made of the above-mentioned laminated material is extruded from a circular die into a tube shape by a multilayer extrusion method and cut into a predetermined length, or a long laminate sheet having a predetermined width and thickness is attached to a cylinder. It can be manufactured by a method of forming a sleeve shape and cutting it into a predetermined length, or a method of forming a strip-shaped laminate sheet in a cylinder and forming a sleeve shape. In the case of a tube shape by the multilayer extrusion method, a beautiful finish without a seam in the body portion 1 is obtained, but there is a limit to the resin material that can be used. When the laminated sheet is formed into a sleeve shape, the productivity is high and the degree of freedom of printing is also large. In addition, an aluminum foil layer, a silica vapor deposition layer, and the like can be appropriately provided as a barrier layer, and the range of the laminated structure becomes extremely wide. In some cases, it may be difficult to adapt depending on the thermal bonding means with the closing member 30. Therefore, it is preferable to select an optimum combination of the laminated structure of the body portion 1, the joining method of the joining portion S, the thermal bonding method, and the like in consideration of the contents, intended use, required cosmetics, and the like.
[0022]
The tube container according to the present invention is not limited to the above description or drawings, and various modifications can be made without departing from the gist of the present invention. For example, the shape of the tube container according to the present invention in plan view may be not only circular but also elliptical. Moreover, the connection mechanism of the head part and the hinge cap part in the closing member is not limited to the so-called three-point hinge of the embodiment, and may be of any kind. Furthermore, as a fitting method of the spout and the plug portion in the closing member, any method such as interposing a cushion material may be used other than the fitting method of the embodiment.
[0023]
【The invention's effect】
The tube container according to the present invention has a reinforcing rib standing on the upper plate from the shoulder portion on the side facing the hinge portion on the inner surface of the head portion, so that the head portion applied from the front side to the head portion applied at the time of opening / closing operation is provided. By adding rigidity to the stress and reducing the stress deformation of the entire upper plate, it is possible to easily open and close the spout, reduce the material cost, and increase the content storage space. Can be reduced as much as possible.
[0024]
Two string-like reinforcements parallel to both sides of the reinforcing rib and close to the periphery of the inner surface of the head portion, extending from the shoulder portion on the side facing the hinge portion to the shoulder portion on the hinge portion side following the upper plate By arranging the ribs, rigidity is given to the stress from the front side of the head part, and rigidity is also given to the stress from the left and right sides to reduce the stress deformation of the entire upper plate. Thus, it is possible to perform a light opening and closing operation of the spout, and at least one orthogonal reinforcing rib is orthogonal to the string-shaped reinforcing rib at a substantially central portion and toward the periphery of the inner surface of the head portion. By arranging each, a tube container that can give further rigidity to the stress from the left and right sides of the head part, reduce the material cost, and increase the content storage space while minimizing the residual amount. To provide Kill.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a first embodiment of a tube container according to the present invention.
FIG. 2 is an external view of the first embodiment.
FIG. 3 is an explanatory view of a tube container adopting a conventional closure member with a hinge cap.
FIG. 4 is an explanatory view of a tube container of a type in which a closing member with a hinge cap is joined to a trunk portion.
FIG. 5 is an explanatory view of a second embodiment of the tube container according to the present invention.
FIG. 6 is an explanatory view of a third embodiment of the tube container according to the present invention.
[Explanation of symbols]
1 trunk
2 Upper plate
3 shoulder
4 outlet
5 Fitting part
6, 7 ribs
8 joints
9 Recessed part
10 Head
11 Cover plate
12 Side wall (skirt)
13 Protruding piece
14 Plug part
15 Circular beat
16 protrusion
20 Hinge cap
30 Closing member
31 Linked body
32 Band
33 Hinge
40 Tube container according to the present invention
C outlet
D steps
H plane part
S joint
P stopper
Q, Q 'string reinforcement rib
R orthogonal reinforcing rib

Claims

A hinge cap comprising a head portion comprising an upper plate provided with a spout at the center, a shoulder portion and a joint portion at the periphery, a lid plate having a plug portion projecting substantially at the center, and a side wall surrounding the periphery of the lid plate. Are connected to each other through a hinge at a predetermined position of the upper plate, and a protrusion is provided in a portion facing the hinge inside the end portion of the side wall of the hinge cap. A closing member made of a polyolefin-based resin that is provided on a stepped surface formed on the upper surface of the upper plate of the head portion and is capable of rotating the hinge cap around the hinge as a rotation shaft is attached to one end of the cylindrical body portion at the joint portion. It is a tube container joined by thermal bonding means, characterized in that a reinforcing rib is provided on the inner surface of the head portion so as to extend from the shoulder portion on the side facing the hinge portion to the upper plate. Tube container.

Two strings parallel to both sides of the reinforcing rib and close to the periphery of the inner surface of the head portion, and straddling the shoulder portion on the hinge portion side from the shoulder portion facing the hinge portion to the upper plate The tube container according to claim 1, wherein each of the reinforcing ribs is disposed.

3. The at least one orthogonal reinforcing rib is respectively disposed at a substantially central portion with respect to the two string-like reinforcing ribs and toward the periphery of the inner surface of the head portion. The tube container as described.