JP4486723B2

JP4486723B2 - Hinge cap

Info

Publication number: JP4486723B2
Application number: JP24449599A
Authority: JP
Inventors: 輝昭林田; 直哉池田; 高史吉田
Original assignee: Mikasa Sangyo Co Ltd
Current assignee: Mikasa Sangyo Co Ltd
Priority date: 1999-08-31
Filing date: 1999-08-31
Publication date: 2010-06-23
Anticipated expiration: 2019-08-31
Also published as: JP2001063747A

Description

【０００１】
【発明の属する技術分野】
この発明は、ガラス製又は合成樹脂製等の液体容器の口部に嵌着される合成樹脂製ヒンジキャップに関するものである。
【０００２】
【従来の技術】
図１３は、従来の打栓形式の合成樹脂製キャップの第一例に関するものである。ａは合成樹脂製キャップで、中蓋ｂと外蓋ｃとが３点式スナップヒンジｄにより一体に設けられている。ｅは内筒で、外筒ｆとともに容器ｇの口部を挟持して圧接嵌合させられる。ｈは係合凸部、ｉは係合凹部である。ｊは遮蔽壁、ｋは裂溝で、プルリング等の裂取部材ｌの引張りによって開口される。ｍは注筒である。上記３点式スナップヒンジｄは、中央のバネヒンジｄoとその両側に位置して回動支点となる一対の薄肉ヒンジｄｎとから構成されている。
【０００３】
図１４及び図１５は、例えば実用新案登録第２５７８０４２号で開示された従来の打栓形式の合成樹脂製キャップの第二例に関するものである。
これは合成樹脂により形成され、頂壁ｐ及び容器の口部の外周をカバーする筒部を有する中蓋ｂと、前記筒部内側に形成された、容器口部外周の係合凹部ｉに圧接係合する係合凸部ｈと、前記中蓋ｂに３点式スナップヒンジｄを介して一体に設けられた外蓋ｃと、前記頂壁ｐの一部で、かつ、前記ヒンジｄに対応する部分に形成された弱化線ｑと、前記ヒンジｄの一側において、前記弱化線ｑに連続し、前記筒部の上端部から下端部まで形成された弱化ラインｒと、前記ヒンジの下方の、かつ、前記弱化ラインｒの他端に対応する前記筒部ｆと連続して形成された、外蓋ｃを外方に引張った場合に外側に片持に牽引される筒部ｆの牽引部とからなり、上記３点式スナップヒンジｄは、中央のバネヒンジｄoとその両側に位置して回動支点となる一対の薄肉ヒンジｄｎから構成される。
【０００４】
上記合成樹脂製キャップはプルタブｌを引き、遮蔽壁ｊを切り裂いて抜き取り、注筒ｍより内容物を注ぐことが出来る。また、容器の内用品の使用後、この容器を回収して再使用する場合、前記外蓋ｃを掴み外方に引張ると、前記ヒンジｄを介して前記頂壁ｐに形成された前記弱化線ｑ及び弱化ラインｒが裂け切られる。なおも該外蓋ｃを外方に引張ると、その力はヒンジの下方の牽引部に及ぼされる。そのため、牽引部近傍は外方に変形して前記係合は緩められる。この状態において、外蓋ｃを斜め上方に引張ると、前記ヒンジｄの下方の筒部ｆ及びこれに連続する牽引部近傍の筒部の係合は緩められると共に、上方に引き上げられるので該キャップを栓抜きを用いることがなく、素手で外し取ることができる。
【０００５】
【発明が解決しようとする課題】
前記従来の第一例では、容器内の内容液を注ぎ出す際、外蓋の開放角度が充分でない場合があり、そのようなとき、注出筒が外蓋の陰になって見えないため、注出し動作が正確に行えないことがある。また、中央のバネヒンジｄｏのスナップ動作によって外蓋が強く閉まり、液飛びが発生することがある。
また、薄肉ヒンジｄｎは屈曲に対しては強いが、引き裂き方向の力に対しては比較的弱く、薄肉ヒンジｄｎが、両側に位置しているため、乱暴に扱うと破損する恐れがあった。
【０００６】
また、前記従来の第二例では、前述のように、弱化ラインｒが筒部の上端部から下端部迄形成されている。そのため、打栓時すなわち容器の口部にキャップを押圧して装着する時に、弱化線に力が加わり、破断しやすい。そのため、弱化線ｑが切れないように嵌合しなければならないので、嵌合力は弱化線を設けないキヤップに比して弱いものとなる。
さらに、前記従来の第二例では、容器を回収して再使用する場合に外蓋を斜め上方に引張る動作が加わるので、上記３点式スナップヒンジdの両側に位置する薄肉ヒンジdnは第一例よりも一層破損する恐れがあった。
【０００７】
本発明はこれらの問題点を解決するためになされたもので、外蓋の開放角度を拡大し、閉止速度を低減し、スナップヒンジによる外蓋の開閉速度と開放角度を最適に調整可能とし、薄肉ヒンジの破断を阻止したヒンジキャップを提供することを目的とする。
【０００８】
【課題を解決するための手段】
本発明は、上記目的を達成するためになされたもので、請求項１記載のヒンジキャップは、容器の口部に圧接嵌合される嵌着部を備えた筒部を有する中蓋と、これと一体に３点式スナップヒンジを介して連結された外蓋とを備えた合成樹脂製キャップであって、上記３点式スナップヒンジは、中央のバネヒンジとその両側に位置して回動支点となる一対の薄肉ヒンジから構成されたヒンジキャップにおいて、上記３点式スナップヒンジの両側に平行に配置した一対のバネ作用を有する均一な肉厚を持ち、外蓋の開放状態において弓形形状になる補助バンドの両端を中蓋と外蓋とに固定したことを特徴とする。
【０００９】
また、請求項２記載のヒンジキャップは、容器の口部に圧接嵌合される嵌着部を備えた筒部を有する中蓋と、これと一体に３点式スナップヒンジを介して連結された外蓋とを備えた合成樹脂製キャップであって、上記３点式スナップヒンジは、中央のバネヒンジとその両側に位置して回動支点となる一対の薄肉ヒンジから構成され、前記嵌着部の内面には、容器の口部の係合凹部に係止する係合凸部が設けられ、前記中蓋の頂壁には前記３点式スナップヒンジを固定するためのヒンジ固定部が設けられ、該ヒンジ固定部の内周側には周方向のスリットが形成され、前記ヒンジ固定部の片側には前記周方向のスリットに連続する縦方向弱化線が前記筒部の上端から下端まで形成されたヒンジキャップにおいて、
前記３点式スナップヒンジの両側に平行に配置した一対の補助バンドの一端を前記ヒンジ固定部の両端に固定し、他端を外蓋に固定したことを特徴とする。
【００１０】
また、請求項３記載のヒンジキャップは、筒部を有する中蓋と、該中蓋に３点式スナップヒンジを介して連結された外蓋とを備えた合成樹脂製キャップであって、前記筒部は、容器の口部に圧接嵌合される嵌着部と、該嵌着部の下端に突設された鍔部と、該鍔部の下面に連続するシール部と、を備え、前記嵌着部の内面には、容器口部の係合凹部に係止する係合凸部が設けられ、前記鍔部は、前記ヒンジを固定するためのヒンジ固定部を有し、該ヒンジ固定部の内周側には、周方向のスリットが形成され、該ヒンジ固定部の両側には前記周方向のスリットに連続する径方向鍔弱化部が形成され、前記シール部には、前記径方向鍔弱化部に連続する縦方向弱化線と周方向弱化線とが形成され、更に前記３点式スナップヒンジは、中央のバネヒンジとその両側に位置して回動支点となる一対の薄肉ヒンジとから構成され、該３点式スナップヒンジの両側に平行に配置した一対の補助バンドの一端を前記ヒンジ固定部の両端に固定し、他端を外蓋に固定したことを特徴とする。
【００１１】
また、請求項４記載のヒンジキャップは、筒部を有する中蓋と、該中蓋に３点式スナップヒンジを介して連結された外蓋とを備えた合成樹脂製キャップであって、前記筒部は、容器の口部に圧接嵌合される嵌着部と、該嵌着部の下端に突設された鍔部と、該鍔部の下面に連続するシール部と、を備え、前記嵌着部の内面には、容器口部の係合凹部に係止する係合凸部が設けられ、前記鍔部は、前記ヒンジを固定するためのヒンジ固定部を有し、該ヒンジ固定部の片側には径方向鍔弱化部が形成され、該ヒンジ固定部の内周側には、前記径方向鍔弱化部に連続する周方向のスリットと、該周方向のスリットに連続する周方向鍔弱化線とが形成され、前記シール部には、前記径方向鍔弱化部に連続する縦方向弱化線が形成され、更に前記３点式スナップヒンジは、中央のバネヒンジとその両側に位置して回動支点となる一対の薄肉ヒンジとから構成され、該３点式スナップヒンジの両側に平行に配置した一対の補助バンドの一端を前記ヒンジ固定部の両端に固定し、他端を外蓋に固定したことを特徴とする。
【００１２】
また、請求項５記載のヒンジキャップは、外蓋の内面に、中蓋が容器口部に装着された際、嵌着部の外面に当接するリング状凸部を形成したことを特徴とする。
【００１３】
【発明の実施の形態】
本発明者は、３点式スナップヒンジだけでは、薄肉ヒンジの破断を阻止することができず、また、開放角度、閉成速度を最適に調整することが困難であると考え、鋭意研究の結果、３点式スナップヒンジの両側に平行に一対の補助バンドを配置すればよいことが判った。
【００１４】
また、本発明者は、筒部の全長にわたり弱化ラインが形成されていることに前記問題の発端があるものと考え、中蓋の機能をそこなうことなく弱化ラインを形成するには、どうしたら良いのかを検討した。
【００１５】
その結果、この筒部を容器の口部に圧接嵌合される嵌着部と、該嵌着部の下端に形成され、かつ、ヒンジを介して外蓋に連結される鍔部と、該鍔部に連続する筒状のシール部と、から構成し、嵌着部には弱化線を設けずに、鍔部とシール部だけに弱化線を設ければ良いことが判った。
【００１６】
即ち、このように構成すれば弱化線のない嵌着部には強い押圧力をかけることができるので、嵌合力を強めることができるものである。また、嵌着部は、筒部の上端部側を占めているに過ぎないので、分別回収時には外蓋を引張ると容易に口部から外れる。
【００１７】
【実施例】
この発明の第一実施例を図１〜３により説明する。ヒンジキャップ１は、中蓋３と、外蓋５と、両蓋３，５を連結するスナップヒンジ２と、を備えている。
【００１８】
該中蓋３は、注筒６と、該注筒６に頂壁７を介して連結された筒部８とを備えている。該注筒６には、流体の流通を遮断する遮断壁１１が設けられている。この遮断壁１１には、無端状の裂溝１２と、プルリング１３とが設けられ、該プルリング１３は裂溝１２の内側に配設されている。
【００１９】
頂壁７には、注筒６と同心状に形成された係合筒９が立設されている。この係合筒９は、該注筒６より大径に形成され、該係合筒９は、閉蓋時に外蓋５の突起１０に係止する。この係合筒９の先端部は、外方に広がり、かつ、その端面９ａは筒部８の外周に向かって傾斜するテーパ面である。
【００２０】
筒部８は、嵌着部１５と、該嵌着部１５の下端に形成された鍔部１６と、該鍔部１６の下面１６ａに連続するシール部１７とを備えている。
該嵌着部１５は、容器２０の口部２１に圧接嵌合されるが、該口部２１は該嵌着部１５と内筒２３とにより挟まれる。この嵌着部１５の下端内面には、係合凸部１６ｂが設けられているが、この凸部１６ｂの配設位置は必要に応じて適宜選択され、例えば、鍔部１６の内面が選ばれる。
【００２１】
前記嵌着部１５と前記鍔部１６とは同心状に設けられ、両者１５，１６は段状をなしている。該鍔部１６上面には閉蓋時に外蓋５が当接する。
【００２２】
スナップヒンジ２は中央のバネヒンジ２５とその両側に位置して回動支点となる一対の薄肉ヒンジ２６から構成されていて、外蓋５を解放し、容器２０内の内容品を注出する際に外蓋５が垂れ下がってこないようになっている。
上記３点式スナップヒンジ２の両側には一対のバネ作用を有する補助バンド５０が平行に配置され、この一対の補助バンド５０の両端が中蓋３と外蓋５とに成形時に一体に固定されている。
【００２３】
図３は図１のIII−III線拡大矢視図である。図に示すように、補助バンド５０は均一な肉厚を持ち、弓形形状である。補助バンド５０の取付け位置は薄肉ヒンジ２６の取付け位置よりも外蓋の開放状態でＨ１＝Ｈ２だけ低い位置にある。したがって、中蓋３の開放力が大きくなるので、中蓋３の開放角度が大きくなる。また、補助バンド５０の長さＬを調整することにより外蓋５の閉じる前のスナップ速度を緩和させ、液はねのトラブルを解消することができる。さらに、補助バンド５０は外側を円弧状に切除され、バネ性の調整と、指先の怪我の防止が図られる。
【００２４】
外蓋５は、閉蓋時、係合筒の先端部９ａに係止する突起１０と、鍔部１６に当接する開口端面部３２とを備えている。この開口端面部３２の先端には、摘み部３３が設けられている。
鍔部１６の下面１６ａ外周には、鍔部１６の外径よりも小径の直筒状のシール部１７が連続している。このシール部１７は前記嵌着部１５および鍔部１６より肉薄に形成されているので変形しやすい。
【００２５】
次に内容物を充填した容器２０にキャップ１を装着する場合の動作について説明する。容器２０の口部２１に、キャップ１を被せ押圧すると、筒部８が該口部２１に嵌着され、係合凸部１６ｂは口部２１の係合凹部２１ａに圧接係合し、シール部１７は口部２１の外周に当接する。
【００２６】
容器２０より内容物を取出すにあたり、予め、プルリング１３に指を掛け、引張り上げることにより遮蔽壁１１を除去しておく。使用時には、外蓋５を指先にて押し上げることによって、バネヒンジ２５のバネ力によって開口させるが、この実施例では、一対のバネ作用を有する補助バンド５０のバネ力によって開放角度が大きくなり、開口部の視認性が良くなる。
【００２７】
内容物の取出しを終り、外蓋５を閉じるとき、指先とバネヒンジ２５のバネ力によって閉口するが、補助バンド５０の存在によりバネヒンジ２５のバネ力を抑止する作用がはたらき、閉じる際のスナップ速度が緩和され、液ハネのトラブルがなくなる。
【００２８】
この発明の第二実施例を図４〜６により説明する。第一実施例と同一部分または相当部分には同一符号を付し、詳細な説明を省略する。図４〜６は前記した従来の打栓形式の合成樹脂製キャップの第二例（図１４〜１５）と類似した構成であるが、回収時のヒンジ切れを防止したものである。
【００２９】
すなわち、容器の口部２１に圧接嵌合される嵌着部１５を備えた筒部８を有する中蓋３と、これと一体に３点式スナップヒンジ２を介して連結された外蓋５とを備えた合成樹脂製ヒンジキャップ１であって、上記３点式スナップヒンジは、中央のバネヒンジ２５とその両側に位置して回動支点となる一対の薄肉ヒンジ２６から構成され、前記嵌着部１５の内面には、容器の口部の係合凹部２１ａに係止する係合凸部１６ｂが設けられ、前記中蓋３の頂壁７には前記３点式スナップヒンジ２を固定するためのヒンジ固定部２８が設けられ、該ヒンジ固定部２８の内周側には周方向のスリット３１が形成され、前記ヒンジ固定部２８の片側には前記周方向のスリット３１に連続する縦方向弱化線３７が前記筒部８の上端から下端まで形成されている。このように、本発明のヒンジキャップは従来公知の第二例と類似した構成であるが、次の点が異なっている。
【００３０】
本発明の第二実施例では、上記３点式スナップヒンジｄの両側に平行に配置した一定の肉厚を有する、一対の補助バンド５０の一端５０ａを前記ヒンジ固定部２８の両端に、成形時に一体に固定し、他端５０ｂを外蓋５に固定した構成となっていて、この補助バンド５０は、リサイクルの機能のみを追及するため、バネ性を格別必要としない。ただし、補助バンドの一端は引裂き開始点に取付けることが必要である。これにより、引張力を集中させ、引裂き開始を容易としている。図６は図５のVI−VI線拡大矢視図である。図において３１は周方向のスリットに相当する切欠部で、補助バンド５０の取付け位置は３点式スナップヒンジ２の取付け位置と同一高さにある。上記補助バンド５０は、バネ作用を必要としないが、勿論バネ作用があっても良く、その場合は、第一実施例で述べた作用効果も期待できる。
【００３１】
また、この発明の第二実施例では、図１４に示す公知例とは縦方向弱化線の方向が異なっている。すなわち、図１４に示す公知例では、周方向弱化部（ｑ弱化線）に連続する縦方向弱化線（ｒ弱化ライン）が前記筒部の上端から下端まで直線的に形成されているが、この発明の第二実施例では、図４に示すように、縦方向弱化線３７は、筒部８の上端から、３７aのように僅かな距離だけ垂直に降下した後、３７ｂのように直ちに方向を引裂き牽引方向に４５度だけ転じ、斜め下方向に筒部８の下端まで形成されている。このようにすれば、円周方向への引裂き開始を容易にすることができる。
【００３２】
この発明の第三実施例を図７〜１０により説明する。第一実施例と同一部分または相当部分には同一符号を付し、詳細な説明を省略する。
【００３３】
鍔部１６のヒンジ固定部２８の両側には、径方向鍔弱化部２９、３０が形成され、また、該ヒンジ固定部２８と嵌着部１５との間には、周方向のスリット３１が設けられている。この径方向鍔弱化部２９，３０は溝状となっており薄肉に形成されているが、その形状等は必要に応じて適宜選択される。例えば、この径方向鍔弱化部２９、３０は該嵌着部１５より突出している部分に半径方向に形成される。前記周方向のスリット３１は前記径方向鍔弱化部２９、３０と連続している。
【００３４】
シール部１７には、前記径方向鍔弱化部２９、３０と連続する周方向弱化線３６、縦方向弱化線３７が設けられている。ここで、弱化線部とは、他の部分より強度的に弱化した線状部を指称するが、その形状等は自由に選択され、例えば、溝や、ミシン目が採用される。
【００３５】
前記弱化線３６は、径方向鍔弱化部２９に連続する周方向弱化線であり、鍔部１６とシール部１７との間に形成されている。この弱化線３６の長さ（中心角度θ）は２７０度であるが、その中心角度は必要に応じて適宜選択される。
【００３６】
前記弱化線３７は、縦方向弱化線で、径方向鍔弱化部３０に連続し、シール部１７の下端１７ａまで達している。この弱化線３７は、軸方向弱化線３７ａと、バネヒンジ２５側に傾いている傾斜弱化線３７ｂとから構成されている。（図１０参照）
【００３７】
前記３点式スナップヒンジの両側に平行に配置した一対のバネ作用を有する補助バンド５０の一端は前記ヒンジ固定部（固定台座）２８の両端に、成形時に一体に固定され、他端は外蓋５に固定されている。
【００３８】
図９は図７のIX−IX線拡大矢視図である。図に示すように、補助バンド５０は均一な肉厚を持ち、弓形形状である。補助バンドの取付け位置は薄肉ヒンジ２６の取付け位置よりも外蓋の開放状態でＨ１＝Ｈ２だけ低い位置にある。したがって、中蓋３の開放力が大きくなるので、中蓋３の開放角度が大きくなる。補助バンド５０の一端は前記ヒンジ固定部（固定台座）２８の両端に固定されているため、引裂き開始用スリット３１よりも低い位置にあっても、引張力を集中させ、引裂き開始を容易としている。
また、補助バンド５０の長さＬを調整することにより外蓋５の閉じる前のスナップ速度を緩和させ、液はねのトラブルを解消することができる。
さらに、補助バンド５０は外側を円弧状に切除され、バネ性の調整と、指先の怪我の防止が図られる。
上記補助バンド５０は、バネ作用を有しているが、リサイクルの機能のみを要求する場合は、勿論バネ作用がなくても良い。
【００３９】
シール部１７の下端１７ａにはシール突部４０が設けられ、このシール凸部４０が口部２１の凹部４１に係合している。従って、シール部下端１７ａより指や針金等を挿入して、悪戯される恐れがないので、ダンパーエビデント性（開封明示機能）を強化することができる。
【００４０】
鍔部１６の外径はシール部１７の外径より大きく形成され、該鍔部１６が、シール部１７より間隔ＳＬだけ外方に突出しているので、この鍔部１６の外周縁部に栓抜きを引掛けて、キャップ１を外すこともできる。
【００４１】
本実施例の作動について説明する。先ず、初めに容器２０にキャップ１を装着する場合について説明する。容器２０の口部２１にキャップ１を被せ押圧すると、筒部８が該口部２１に嵌着され、係合凸部１６ｂは口部２１の係合凹部２１ａに圧接係合し、シール部１７は口部２１の外周に当接する。
【００４２】
この時、該嵌着部１５には大きな力が加わるが、該嵌着部１５には弱化線が形成されていないので、嵌合力を低下させる必要はない。
また、シール部１７には弱化線３６，３７が形成されているが、このシール部１７はその下端１７ａが口部２１外周に当接しているだけなので、該弱化線３６，３７が切れ易くなることもない。
【００４３】
次にキャップ１を外して分別回収する場合について説明する。外蓋５の摘み部３３に指をかけ上方に押し上げて外蓋５を開き、該外蓋５を手で摘み、矢印Ａ１方向に引張ると径方向鍔弱化部２９、３０が切れる。この時、径方向鍔弱化部２９，３０は周方向のスリット３１に連続しているので、該径方向鍔弱化部２９、３０の周方向のスリット３１との連結基部には集中応力がかかる。そのため、該径方向鍔弱化部２９、３０は容易に裂け切られる。
【００４４】
該外蓋５を更に同方向に引張ると、シール部１７の縦方向弱化線３７が切れる。該外蓋５を矢印Ａ５方向に引張ると、周方向弱化線３６の始端が切れ始め、該シール部１７は鍔部１６の外周に沿って円周方向に切り離される。
【００４５】
該弱化線３６が終端まで切れると、嵌着部１５の係合凸部１６ａのみが容器２０の口部２１に係合しているに過ぎない状態になる。そのため、外蓋５を上方に引張るだけで該係合凸部１５ａは口部２１から外れ、キャップ１全体を簡単に取外すことができる。
【００４６】
請求項４に記載のヒンジキャップは、ヒンジ固定部２８の片側には径方向鍔弱化３０部が形成され、該ヒンジ固定部２８の内周側には、前記径方向鍔弱化部３０に連続する周方向のスリット３１と、該周方向のスリット３１に連続する周方向鍔弱化線３６とが形成され、前記シール部１７には、前記径方向鍔弱化部３０に連続する縦方向弱化線３７が形成されている他は請求項３に記載のヒンジキャップと同様である。このようにしても、前記実施例とほぼ同一の作用効果を奏することができる。
【００４７】
請求項５に記載のヒンジキャップは、図１１に示すように、外蓋５の内面に、リング状凸部５１が形成されている。キャップ１を容器の口部２１に打栓装着する前は、図１１のようにリング状凸部５１は中蓋３側面から離れているが、キャップ１を口部２１に打栓装着すると、嵌着部１５が膨出することで、図１２に示すように、リング状凸部５１は中蓋３側面に圧接し、シール状態を保持する。なお、キャップ１を容器の口部２１に打栓装着する前からリング状凸部５１を中蓋３側面に当接させてあっても、弾性変形によって全体的に膨出して良好なシール状態を持続することができる。
このようにすれば、内容物を高温で充填した後キャップ１を打栓し、シャワー水で冷却する充填ラインにおいて、冷却時にキャップの内外の気圧差によって生じるシャワー水の内部への吸込みを防ぐことができる。
【００４８】
【発明の効果】
本発明は、以上説明したように構成されているので、以下に記載されるような効果を奏する。
【００４９】
本発明の請求項１記載のヒンジキャップは、３点式スナップヒンジの両側に平行に配置した一対のバネ作用を有する補助バンドの両端を中蓋と外蓋とに固定したことにより、外蓋の開放角度が大きくなり、開口部の視認性が良くなる。さらに、閉蓋時にはバネヒンジのバネ力を抑止する作用がはたらき、閉じる際のスナップ速度が緩和され、液ハネのトラブルがなくなる。
【００５０】
本発明の請求項２記載のヒンジキャップは、ヒンジ固定部の内周側には周方向のスリットと、ヒンジ固定部の片側には前記周方向のスリットに連続する縦方向弱化線が形成されたヒンジキャップにおいて、３点式スナップヒンジの両側に平行に配置した一対の補助バンドの一端を前記ヒンジ固定部の両端に固定し、他端を外蓋に固定したことにより、引裂き強力の弱い薄肉ヒンジを補強し、回収時に引張力を集中させ、引裂きを容易に開始することができる。
【００５１】
本発明の請求項３及び４記載のヒンジキャップは、筒部を嵌着部とシール部とに分け、周方向のスリットを設けたので、嵌着部を強く口部に嵌合しても、前記弱化線が裂け切れることはない。従って、嵌合力の大きなキャップを得ることができる。さらに、３点式スナップヒンジの両側に平行に配置した一対の補助バンドの一端を前記ヒンジ固定部の両端に固定し、他端を外蓋に固定したことによって、開蓋時には外蓋の開放角度が大きくなり、開口部の視認性が良くなると共に、閉蓋時にはバネヒンジのバネ力を抑止する作用がはたらき、閉じる際のスナップ速度が緩和され、液ハネのトラブルがなくなる。また、引裂き強力の弱い薄肉ヒンジを補強し、回収時に引張力を集中させ、引裂きを容易に開始することができる。
【００５２】
本発明の請求項５記載のヒンジキャップは、外蓋の内面に、中蓋が容器口部に装着された際、嵌着部の外面に当接するリング状凸部を形成したことによって、シャワー水で冷却する充填ラインにおいて、冷却時にキャップの内外の気圧差によって生じるシャワー水の吸込みを防ぐことができる。
【図面の簡単な説明】
【図１】本発明の第一実施例の開蓋状態を示す平面図である。
【図２】図１のII−II線断面矢視図である。
【図３】図１のIII−III線矢視図である。
【図４】本発明の第二実施例の開蓋状態を示す側面図である。
【図５】本発明の第二実施例の開蓋状態を示す平面図である。
【図６】図５のVI−VI線矢視図である。
【図７】本発明の第三実施例の開蓋状態を示す平面図である。
【図８】図７のVIII−VIII線断面矢視図である。
【図９】図７のIX−IX線矢視図である。
【図１０】本発明の第三実施例の閉蓋状態を示す正面図である。
【図１１】請求項５に記載のヒンジキャップの閉蓋状態を示す断面図である。
【図１２】請求項５に記載のヒンジキャップの容器への装着状態を示す断面図である。
【図１３】従来の第一例の開蓋状態を示す側断面図である。
【図１４】従来の第二例の開蓋状態を示す斜視図である。
【図１５】従来の第二例の開蓋状態を示す側断面図である。
【符号の説明】
１（ヒンジ）キャップ
２スナップヒンジ
３中蓋
５外蓋
６注筒
７頂壁
８筒部
９係合筒
１０突起
１１遮断壁
１２裂溝
１３プルリング
１５嵌着部
１６鍔部１６
１６ａ下面
１６ｂ係合凸部
１７シール部
１７ａシール部下端
２０容器
２１口部
２１ａ係合凹部
２３内筒
２５バネヒンジ
２６薄肉ヒンジ
２８ヒンジ固定部
２９径方向鍔弱化部
３０径方向鍔弱化部
３１周方向（鍔）弱化部（スリット）
３２開口端面部
３３摘み部
３６周方向弱化線
３７縦方向弱化線
３７ａ軸方向弱化線
３７ｂ傾斜弱化線
４０シール突部
４１凹部
５０補助バンド
５１リング状凸部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin hinge cap fitted into a mouth of a liquid container made of glass or synthetic resin.
[0002]
[Prior art]
FIG. 13 relates to a first example of a conventional stopper cap made of synthetic resin. a is a synthetic resin cap, and an inner lid b and an outer lid c are integrally provided by a three-point snap hinge d. Reference numeral e denotes an inner cylinder, which is press-fitted and fitted with the outer cylinder f together with the mouth of the container g. h is an engaging convex part, and i is an engaging concave part. j is a shielding wall, k is a fissure, and is opened by pulling a tearing member l such as a pull ring. m is a barrel. The three-point snap hinge d is composed of a center spring hinge do and a pair of thin hinges dn that are located on both sides of the center hinge hinge dn and serve as pivot points.
[0003]
14 and 15 relate to a second example of a conventional stopper-type synthetic resin cap disclosed in , for example, Utility Model Registration No. 2578042.
This is made of a synthetic resin, and is pressed against an inner lid b having a cylindrical portion covering the top wall p and the outer periphery of the container mouth, and an engagement recess i formed on the inner periphery of the container mouth. Engaging projection h to be engaged, outer lid c integrally provided on the inner lid b via a three-point snap hinge d, a part of the top wall p, and corresponding to the hinge d A weakening line q formed in a part to be formed, a weakening line r formed on one side of the hinge d from the upper end portion to the lower end portion of the cylindrical portion, and the lower side of the hinge. And the traction part of the cylinder part f formed continuously with the cylinder part f corresponding to the other end of the weakening line r and pulled to the outside in a cantilever manner when the outer lid c is pulled outward. The three-point snap hinge d is a central spring hinge do and both sides of the center hinge hinge d, and serves as a pivot point. It is comprised from a pair of thin hinge dn.
[0004]
The synthetic resin cap can pull the pull tab l, cut off the shielding wall j, and pour the contents from the barrel m. Further, when the container is recovered and reused after the use of the internal supplies of the container, when the outer lid c is gripped and pulled outward, the weakening line formed on the top wall p via the hinge d q and the weakening line r are broken. When the outer lid c is pulled outward, the force is exerted on the pulling portion below the hinge. Therefore, the vicinity of the traction portion is deformed outward and the engagement is loosened. In this state, when the outer lid c is pulled obliquely upward, the engagement between the cylindrical portion f below the hinge d and the cylindrical portion adjacent to the traction portion which is continuous with this is loosened, and the cap is lifted upward. Can be removed with bare hands without using a bottle opener.
[0005]
[Problems to be solved by the invention]
In the first example of the prior art, when the content liquid in the container is poured out, the opening angle of the outer lid may not be sufficient, and in such a case, the dispensing cylinder is not visible behind the outer lid, The dispensing operation may not be performed accurately. Further, the outer lid is strongly closed by the snap operation of the central spring hinge do, and liquid splash may occur.
Further, the thin hinge dn is strong against bending, but relatively weak against the force in the tearing direction, and since the thin hinge dn is located on both sides, there is a risk of damage if handled roughly.
[0006]
In the second conventional example, as described above, the weakening line r is formed from the upper end to the lower end of the cylindrical portion. Therefore, a force is applied to the weakening line when the cap is pressed and attached to the mouth of the container, and it is easy to break. Therefore, since it must be fitted so that the weakening line q does not break, the fitting force is weaker than that of a cap without a weakening line.
Further, in the second conventional example, when the container is recovered and reused, an operation of pulling the outer lid obliquely upward is added. Therefore, the thin hinges dn located on both sides of the three-point snap hinge d are the first ones. There was a risk of further damage than in the examples.
[0007]
The present invention has been made to solve these problems, expanding the opening angle of the outer lid, reducing the closing speed, making it possible to optimally adjust the opening / closing speed and opening angle of the outer lid by the snap hinge, An object of the present invention is to provide a hinge cap that prevents the thin-walled hinge from breaking.
[0008]
[Means for Solving the Problems]
The present invention has been made in order to achieve the above object, and the hinge cap according to claim 1 includes an inner lid having a cylindrical portion having a fitting portion that is press-fitted to a mouth portion of a container, and And a synthetic resin cap that is integrally connected with the outer lid via a three-point snap hinge, the three-point snap hinge being located at the center spring hinge and the pivot fulcrum. in a pair of hinge cap constructed from thin hinge made, Chi lifting a uniform wall thickness having a pair of spring action arranged in parallel on both sides of the three-point snap hinge becomes arcuate shape in the open state of the outer lid Both ends of the auxiliary band are fixed to the inner lid and the outer lid.
[0009]
Further, the hinge cap according to claim 2 is connected to the inner lid having a cylindrical portion having a fitting portion press-fitted to the mouth portion of the container, and is integrally connected thereto via a three-point snap hinge. The three-point snap hinge includes a central spring hinge and a pair of thin hinges that are located on both sides of the cap and are pivotal fulcrums. The inner surface is provided with an engaging convex portion that is engaged with the engaging concave portion of the mouth portion of the container, and the top wall of the inner lid is provided with a hinge fixing portion for fixing the three-point snap hinge, the on the inner circumferential side of the hinge fixing portion peripheral direction of slits are formed, formed on one side of the hinge fixing portion is longitudinally weakened line continuous in the circumferential direction toward the slit to the bottom from the top of the cylindrical portion Hinged cap,
One end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion, and the other end is fixed to an outer lid.
[0010]
The hinge cap according to claim 3 is a synthetic resin cap provided with an inner lid having a cylindrical portion and an outer lid connected to the inner lid via a three-point snap hinge. The portion includes a fitting portion that is press-fitted to the mouth portion of the container, a flange portion that protrudes from a lower end of the fitting portion, and a seal portion that is continuous with a lower surface of the flange portion, and the fitting The inner surface of the landing portion is provided with an engaging convex portion that engages with the engaging concave portion of the container mouth portion, and the flange portion has a hinge fixing portion for fixing the hinge. on the inner circumference side, the circumferential direction of slits are formed, on both sides of the hinge fixing portion radially flange weakened portion continuous in the circumferential direction of slits are formed, the seal portion, the radial A longitudinal direction weakening line and a circumferential direction weakening line that are continuous with the weakened portion are formed, and the three-point snap hinge further includes a central spring hinge. And its located in both sides and a pair of thin hinges serving as the rotation fulcrum, is fixed to one end of the pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinges at both ends of the hinge fixing portion The other end is fixed to the outer lid.
[0011]
The hinge cap according to claim 4 is a synthetic resin cap provided with an inner lid having a cylindrical portion and an outer lid connected to the inner lid via a three-point snap hinge. The portion includes a fitting portion that is press-fitted to the mouth portion of the container, a flange portion that protrudes from a lower end of the fitting portion, and a seal portion that is continuous with a lower surface of the flange portion, and the fitting The inner surface of the landing portion is provided with an engaging convex portion that engages with the engaging concave portion of the container mouth portion, and the flange portion has a hinge fixing portion for fixing the hinge. one radial flange weakened portion is formed on the inner peripheral side of the hinge fixing portion has a circumferential direction of slits continuous in the radial flange weakening, circumferentially continuous in circumferential direction slit is formed with a flange weakened line, said sealing portion, longitudinal weakening lines continuous in the radial flange weakened portion is formed, further wherein the 3 Tenshikisu Ppuhinji is composed of a pair of thin hinges serving as the rotation fulcrum positioned central spring hinge and on both sides thereof, said one end of the pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge hinged It fixed to the both ends of a part, and the other end was fixed to the outer cover.
[0012]
According to a fifth aspect of the present invention, the hinge cap is characterized in that an inner surface of the outer lid is formed with a ring-shaped convex portion that comes into contact with the outer surface of the fitting portion when the inner lid is attached to the container mouth.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The present inventor considers that the thin-walled hinge cannot be broken only with the three-point snap hinge, and that it is difficult to optimally adjust the opening angle and the closing speed, and as a result of earnest research. It has been found that a pair of auxiliary bands may be arranged in parallel on both sides of the three-point snap hinge.
[0014]
In addition, the present inventor considers that the above-mentioned problem is caused by the fact that the weakening line is formed over the entire length of the cylindrical portion, and what should be done to form the weakening line without deteriorating the function of the inner lid. We examined whether.
[0015]
As a result, a fitting portion that press-fits the tubular portion to the mouth portion of the container, a flange portion that is formed at the lower end of the fitting portion and is connected to the outer lid via a hinge, It has been found that it is only necessary to provide a weakening line only on the collar part and the sealing part without providing a weakening line on the fitting part.
[0016]
That is, with such a configuration, a strong pressing force can be applied to the fitting portion having no weakening line, so that the fitting force can be increased. Moreover, since the fitting part only occupies the upper end part side of a cylinder part, it will remove | deviate from an opening | mouth part easily, if an outer cover is pulled at the time of a collection collection.
[0017]
【Example】
A first embodiment of the present invention will be described with reference to FIGS. The hinge cap 1 includes an inner lid 3, an outer lid 5, and a snap hinge 2 that couples the lids 3 and 5.
[0018]
The inner lid 3 includes a casting cylinder 6 and a cylinder portion 8 connected to the casting cylinder 6 via a top wall 7. The injection tube 6 is provided with a blocking wall 11 that blocks the flow of fluid. The blocking wall 11 is provided with an endless fissure 12 and a pull ring 13. The pull ring 13 is disposed inside the fissure 12.
[0019]
On the top wall 7, an engaging cylinder 9 is formed so as to be concentric with the casting cylinder 6. The engaging cylinder 9 is formed to have a larger diameter than the casting cylinder 6, and the engaging cylinder 9 is locked to the protrusion 10 of the outer lid 5 when the lid is closed. The distal end portion of the engagement tube 9 extends outward, and the end surface 9 a is a tapered surface that is inclined toward the outer periphery of the tube portion 8.
[0020]
The cylindrical portion 8 includes an fitting portion 15, a flange portion 16 formed at the lower end of the fitting portion 15, and a seal portion 17 continuous with the lower surface 16 a of the flange portion 16.
The fitting portion 15 is press-fitted to the mouth portion 21 of the container 20, and the mouth portion 21 is sandwiched between the fitting portion 15 and the inner cylinder 23. An engagement convex portion 16b is provided on the inner surface of the lower end of the fitting portion 15. The arrangement position of the convex portion 16b is appropriately selected as necessary. For example, the inner surface of the flange portion 16 is selected. .
[0021]
The fitting portion 15 and the flange portion 16 are provided concentrically, and both 15 and 16 are stepped. The outer lid 5 comes into contact with the upper surface of the flange portion 16 when the lid is closed.
[0022]
The snap hinge 2 is composed of a central spring hinge 25 and a pair of thin hinges 26 which are located on both sides of the central hinge 26 and serve as pivot points. When the outer lid 5 is released and the contents in the container 20 are poured out. The outer lid 5 does not hang down.
A pair of auxiliary bands 50 having a spring action are arranged in parallel on both sides of the three-point snap hinge 2, and both ends of the pair of auxiliary bands 50 are integrally fixed to the inner lid 3 and the outer lid 5 at the time of molding. ing.
[0023]
3 is an enlarged view taken along the line III-III in FIG. As shown in the figure, the auxiliary band 50 has a uniform thickness and has an arcuate shape. The attachment position of the auxiliary band 50 is lower than the attachment position of the thin-walled hinge 26 by H1 = H2 when the outer lid is opened. Therefore, since the opening force of the inner lid 3 is increased, the opening angle of the inner lid 3 is increased. Further, by adjusting the length L of the auxiliary band 50, the snap speed before the outer lid 5 is closed can be relaxed, and the trouble of the liquid splash can be solved. Further, the auxiliary band 50 is cut out in an arc shape to adjust the spring property and prevent fingertip injury.
[0024]
The outer lid 5 includes a protrusion 10 that is engaged with the distal end portion 9a of the engagement cylinder and an open end surface portion 32 that is in contact with the flange portion 16 when the lid is closed. A knob portion 33 is provided at the tip of the opening end surface portion 32.
A straight cylindrical seal portion 17 having a diameter smaller than the outer diameter of the flange portion 16 is continuous with the outer periphery of the lower surface 16 a of the flange portion 16. Since the seal portion 17 is formed thinner than the fitting portion 15 and the flange portion 16, it is easily deformed.
[0025]
Next, the operation when the cap 1 is attached to the container 20 filled with the contents will be described. When the cap 21 is put on the mouth portion 21 of the container 20 and pressed, the cylindrical portion 8 is fitted into the mouth portion 21, and the engaging convex portion 16 b is press-engaged with the engaging concave portion 21 a of the mouth portion 21, and the seal portion 17 abuts on the outer periphery of the mouth 21.
[0026]
In order to take out the contents from the container 20, the shielding wall 11 is removed in advance by placing a finger on the pull ring 13 and pulling it up. At the time of use, the outer lid 5 is pushed up by the fingertip to be opened by the spring force of the spring hinge 25. In this embodiment, the opening angle is increased by the spring force of the auxiliary band 50 having a pair of spring action, and the opening portion Visibility is improved.
[0027]
When the outer cover 5 is closed after the contents are taken out, the mouth is closed by the spring force of the fingertip and the spring hinge 25. The presence of the auxiliary band 50 acts to suppress the spring force of the spring hinge 25, and the snap speed at the time of closing is increased. Alleviated and no liquid splash trouble.
[0028]
A second embodiment of the present invention will be described with reference to FIGS. Parts that are the same as or equivalent to those in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted. FIGS. 4 to 6 are similar in structure to the above-described second example (FIGS. 14 to 15) of the conventional stopper cap made of synthetic resin, but prevent the hinge from being broken during recovery.
[0029]
That is, the inner lid 3 having the cylindrical portion 8 provided with the fitting portion 15 that is press-fitted to the mouth portion 21 of the container, and the outer lid 5 that is integrally connected thereto via the three-point snap hinge 2 The three-point snap hinge includes a central spring hinge 25 and a pair of thin hinges 26 that are positioned on both sides of the hinge hinge 1 and serve as pivotal fulcrums. 15 is provided with an engaging convex portion 16b that is engaged with an engaging concave portion 21a of the mouth portion of the container, and the top wall 7 of the inner lid 3 is fixed to the three-point snap hinge 2. hinge fixing portion 28 is provided, said the inner peripheral side of the hinge fixing portion 28 slit 31 in the circumferential direction is formed longitudinally on one side of the hinge fixing portion 28 that is continuous with the slit 31 of the peripheral direction A weakening line 37 is formed from the upper end to the lower end of the cylindrical portion 8. . As described above, the hinge cap of the present invention has a configuration similar to the conventionally known second example, but differs in the following points.
[0030]
In the second embodiment of the present invention, one end 50a of a pair of auxiliary bands 50 having a certain thickness arranged in parallel on both sides of the three-point snap hinge d is formed at both ends of the hinge fixing portion 28 at the time of molding. The auxiliary band 50 pursues only the recycling function, and does not require any special spring property, since the other end 50 b is fixed to the outer lid 5. However, it is necessary to attach one end of the auxiliary band to the tear starting point. This concentrates the tensile force and facilitates the start of tearing. 6 is an enlarged view taken along line VI-VI in FIG. In the figure, reference numeral 31 denotes a notch corresponding to a circumferential slit, and the mounting position of the auxiliary band 50 is at the same height as the mounting position of the three-point snap hinge 2. The auxiliary band 50 does not require a spring action, but of course may have a spring action. In that case, the action and effect described in the first embodiment can also be expected.
[0031]
Further, in the second embodiment of the present invention, the direction of the longitudinal direction weakening line is different from the known example shown in FIG. That is, in the known example shown in FIG. 14, the longitudinal direction weakening line (r weakening line) continuous to the circumferential direction weakening part (q weakening line) is linearly formed from the upper end to the lower end of the cylindrical part. In the second embodiment of the invention, as shown in FIG. 4, the longitudinal direction weakening line 37 descends vertically from the upper end of the cylindrical portion 8 by a small distance as indicated by 37a, and then immediately changes its direction as indicated by 37b. It is turned 45 degrees in the tearing and pulling direction, and is formed diagonally downward to the lower end of the cylindrical portion 8. In this way, it is possible to easily start tearing in the circumferential direction.
[0032]
A third embodiment of the present invention will be described with reference to FIGS. Parts that are the same as or equivalent to those in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.
[0033]
On both sides of the hinge fixing portion 28 of the flange 16, the radial flange weakening 29, 30 are formed, also, between the application section 15 fitted with the hinge fixing unit 28, the circumferential direction of the slit 31 is provided It has been. The radial direction weakening portions 29 and 30 have a groove shape and are formed thin, but the shape and the like are appropriately selected as necessary. For example, the radial direction weakening portions 29 and 30 are formed in a radial direction in a portion protruding from the fitting portion 15. The slit 31 in the circumferential Direction is continuous with said radial flange weakened portion 29, 30.
[0034]
The seal portion 17 is provided with a circumferential weakening line 36 and a longitudinal weakening line 37 that are continuous with the radial wrinkle weakening portions 29 and 30. Here, the weakened line portion refers to a linear portion weakened more strongly than other portions, but the shape or the like is freely selected, and for example, a groove or a perforation is adopted.
[0035]
The weakening line 36 is a circumferential weakening line continuous to the radial wrinkle weakening portion 29 and is formed between the flange portion 16 and the seal portion 17. The length of the weakening line 36 (center angle θ) is 270 degrees, and the center angle is appropriately selected as necessary.
[0036]
The weakening line 37 is a longitudinal weakening line, continues to the radial direction weakening part 30, and reaches the lower end 17 a of the seal part 17. The weakening line 37 includes an axial direction weakening line 37a and an inclined weakening line 37b that is inclined toward the spring hinge 25 side. (See Figure 10)
[0037]
One end of a pair of spring bands 50 arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion (fixing base) 28 at the time of molding, and the other end is an outer lid. 5 is fixed.
[0038]
FIG. 9 is an enlarged view taken along line IX-IX in FIG. As shown in the figure, the auxiliary band 50 has a uniform thickness and has an arcuate shape. The mounting position of the auxiliary band is lower than the mounting position of the thin hinge 26 by H1 = H2 when the outer lid is opened. Therefore, since the opening force of the inner lid 3 is increased, the opening angle of the inner lid 3 is increased. Since one end of the auxiliary band 50 is fixed to both ends of the hinge fixing portion (fixing base) 28, the tensile force is concentrated even at a position lower than the tear starting slit 31, thereby facilitating the start of tearing. .
Further, by adjusting the length L of the auxiliary band 50, the snap speed before the outer lid 5 is closed can be relaxed, and the trouble of the liquid splash can be solved.
Further, the auxiliary band 50 is cut out in an arc shape to adjust the spring property and prevent fingertip injury.
The auxiliary band 50 has a spring action, but of course, when only a recycling function is required, the auxiliary band 50 may not have a spring action.
[0039]
A seal projection 40 is provided at the lower end 17 a of the seal portion 17, and the seal projection 40 is engaged with the recess 41 of the mouth portion 21. Therefore, since there is no possibility of mischief by inserting a finger, a wire, or the like from the lower end 17a of the seal portion, the damper evidence (opening clear function) can be enhanced.
[0040]
The outer diameter of the flange portion 16 is formed larger than the outer diameter of the seal portion 17, and the flange portion 16 protrudes outward from the seal portion 17 by a distance SL. The cap 1 can be removed by hooking.
[0041]
The operation of this embodiment will be described. First, a case where the cap 1 is attached to the container 20 will be described first. When the cap 1 is put on the mouth portion 21 of the container 20 and pressed, the cylindrical portion 8 is fitted into the mouth portion 21, the engaging convex portion 16 b is press-engaged with the engaging concave portion 21 a of the mouth portion 21, and the seal portion 17. Contacts the outer periphery of the mouth 21.
[0042]
At this time, a large force is applied to the fitting portion 15, but since no weakening line is formed on the fitting portion 15, it is not necessary to reduce the fitting force.
Further, the weakened lines 36 and 37 are formed on the seal portion 17, but since the lower end 17 a of the seal portion 17 is only in contact with the outer periphery of the mouth portion 21, the weakened lines 36 and 37 are easily cut. There is nothing.
[0043]
Next, a case where the cap 1 is removed and collected separately will be described. A finger is put on the knob 33 of the outer lid 5 and pushed upward to open the outer lid 5. When the outer lid 5 is picked by hand and pulled in the direction of arrow A 1, the radial weakened portions 29, 30 are cut. At this time, since the radial flange weakening 29, 30 are continuous to the slits 31 in the circumferential Direction, the connecting base of the slit 31 in the circumferential Direction of該径direction flange weakening 29, 30 concentrate stress Take it. Therefore, the radial direction weakening parts 29 and 30 are easily torn.
[0044]
When the outer lid 5 is further pulled in the same direction, the longitudinal direction weakening line 37 of the seal portion 17 is cut. When the outer lid 5 is pulled in the direction of the arrow A5, the starting end of the circumferential weakening line 36 starts to be cut, and the seal portion 17 is separated in the circumferential direction along the outer periphery of the flange portion 16 .
[0045]
When the weakening line 36 is cut to the end, only the engaging convex portion 16 a of the fitting portion 15 is engaged with the mouth portion 21 of the container 20. Therefore, simply by pulling the outer lid 5 upward, the engaging convex portion 15a is detached from the mouth portion 21, and the entire cap 1 can be easily removed.
[0046]
In the hinge cap according to claim 4, a radial weakening portion 30 is formed on one side of the hinge fixing portion 28, and the radial fixing portion 30 is continuous on the inner peripheral side of the hinge fixing portion 28. a slit 31 in the circumferential direction, is formed a circumferential flange weakening line 36 continuous to the slit 31 of the peripheral direction, the seal portion 17, longitudinal weakening lines continuous in the radial flange weakened portion 30 The hinge cap is the same as that of claim 3 except that 37 is formed. Also in this manner, it is possible to obtain substantially the same effects as the embodiment.
[0047]
As shown in FIG. 11, the hinge cap according to claim 5 has a ring-shaped convex portion 51 formed on the inner surface of the outer lid 5. Before attaching the cap 1 to the mouth portion 21 of the container, the ring-shaped convex portion 51 is separated from the side surface of the inner lid 3 as shown in FIG. As shown in FIG. 12, the ring-shaped convex portion 51 is pressed against the side surface of the inner lid 3 and maintains the sealed state. Even if the ring-shaped convex portion 51 is brought into contact with the side surface of the inner lid 3 before the cap 1 is plugged into the mouth portion 21 of the container, the entire cap bulges due to elastic deformation and a good sealing state is obtained. Can last.
In this way, in the filling line in which the cap 1 is plugged after the contents are filled at a high temperature and cooled with shower water, suction into the shower water caused by the pressure difference between the inside and outside of the cap during cooling is prevented. Can do.
[0048]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0049]
The hinge cap according to claim 1 of the present invention is such that the both ends of a pair of spring bands arranged in parallel on both sides of the three-point snap hinge are fixed to the inner lid and the outer lid. The opening angle is increased, and the visibility of the opening is improved. Further, when the lid is closed, the action of suppressing the spring force of the spring hinge works, the snap speed at the time of closing is relaxed, and there is no trouble of liquid splash.
[0050]
The hinge cap according to a second aspect of the present invention, longitudinal weakening lines on the inner peripheral side of the hinge fixing portion and peripheral Direction slit on one side of the hinge fixing portion continuous in the circumferential Direction of slits formed In the hinge cap, the one end of the pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion, and the other end is fixed to the outer lid, so that the tearing strength is weak. The thin-walled hinge can be reinforced to concentrate the pulling force during recovery, and tearing can be started easily.
[0051]
The hinge cap according to claim 3 and 4 wherein the invention is divided into the cylindrical portion in the fitting portion and the sealing portion, is provided with the circumferential Direction of slits, even if fitted to the mouth portion strongly fitting portion The weakening line will not be broken. Therefore, a cap with a large fitting force can be obtained. Furthermore, one end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion, and the other end is fixed to the outer lid. And the visibility of the opening is improved, and the action of suppressing the spring force of the spring hinge works when the cover is closed, the snap speed at the time of closing is alleviated, and the trouble of liquid splash is eliminated. Moreover, the thin-walled hinge having a weak tearing strength is reinforced, and the tensile force can be concentrated at the time of recovery, so that the tearing can be easily started.
[0052]
According to a fifth aspect of the present invention, the hinge cap according to the present invention includes a ring-shaped convex portion that is in contact with the outer surface of the fitting portion when the inner lid is attached to the container mouth portion on the inner surface of the outer lid. In the filling line that is cooled in step 1, the suction of shower water caused by the pressure difference between the inside and outside of the cap during cooling can be prevented.
[Brief description of the drawings]
FIG. 1 is a plan view showing an open state of a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a view taken along the line III-III in FIG. 1;
FIG. 4 is a side view showing the open state of the second embodiment of the present invention.
FIG. 5 is a plan view showing an open state of the second embodiment of the present invention.
6 is a view taken in the direction of arrows VI-VI in FIG. 5;
FIG. 7 is a plan view showing an open state of the third embodiment of the present invention.
8 is a cross-sectional view taken along line VIII-VIII in FIG.
9 is a view taken along the line IX-IX in FIG.
FIG. 10 is a front view showing a closed state of the third embodiment of the present invention.
11 is a cross-sectional view showing a closed state of the hinge cap according to claim 5. FIG.
12 is a cross-sectional view showing a state in which the hinge cap according to claim 5 is attached to a container. FIG.
FIG. 13 is a side sectional view showing a state of opening of a first conventional example.
FIG. 14 is a perspective view showing a lid open state of a second conventional example.
FIG. 15 is a side cross-sectional view showing a lid open state of a second conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 (Hinge) cap 2 Snap hinge 3 Middle lid 5 Outer lid 6 Injection cylinder 7 Top wall 8 Cylinder part 9 Engagement cylinder 10 Protrusion 11 Blocking wall 12 Fissure 13 Pull ring 15 Fitting part 16 Ridge part 16
16a Lower surface 16b Engaging convex part 17 Sealing part 17a Sealing part lower end 20 Container 21 Mouth part 21a Engaging concave part 23 Inner cylinder 25 Spring hinge 26 Thin hinge 28 Hinge fixing part 29 Radial direction weakening part 30 Radial radial weakening part 31 Circumferential direction (鍔) Weakened part (slit)
32 Opening end face part 33 Knob part 36 Circumferential weakening line 37 Longitudinal weakening line 37a Axial weakening line 37b Inclination weakening line 40 Seal protrusion 41 Recess 50 Auxiliary band 51 Ring-shaped convex part

Claims

A synthetic resin cap including an inner lid having a cylindrical portion having a fitting portion press-fitted to a mouth portion of a container, and an outer lid integrally connected thereto via a three-point snap hinge The above-mentioned three-point snap hinge is a hinge cap composed of a central spring hinge and a pair of thin hinges located on both sides of the hinge hinge,
Chi lifting uniform thickness having a pair of spring action arranged in parallel on both sides of the three-point snap hinge, fastened to the middle cover both ends of the auxiliary band of the bow shaped in the open state of the outer lid and the outer lid A hinge cap characterized by that.

A synthetic resin cap including an inner lid having a cylindrical portion having a fitting portion press-fitted to a mouth portion of a container, and an outer lid integrally connected thereto via a three-point snap hinge The three-point snap hinge includes a central spring hinge and a pair of thin hinges positioned on both sides of the hinge hinge and serving as a rotation fulcrum. An engaging convex portion is provided to be engaged with the concave portion, and a hinge fixing portion for fixing the three-point snap hinge is provided on the top wall of the inner lid, and a peripheral portion is provided on the inner peripheral side of the hinge fixing portion. square direction of the slits are formed in the hinge cap longitudinal line of weakness is formed to the lower end from an upper end of the tubular portion on one side continuous to the circumferential direction of slits of the hinge fixing portion,
A hinge cap characterized in that one end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion and the other end is fixed to an outer lid.

A synthetic resin cap comprising an inner lid having a tubular portion and an outer lid connected to the inner lid via a three-point snap hinge,
The cylindrical portion includes a fitting portion that is press-fitted to the mouth portion of the container, a flange portion that protrudes from the lower end of the fitting portion, and a seal portion that is continuous with the lower surface of the flange portion, On the inner surface of the fitting portion, there is provided an engaging convex portion that engages with an engaging concave portion of the container mouth portion, and the flange portion has a hinge fixing portion for fixing the hinge, and the hinge fixing the inner peripheral side parts, peripheral direction of slits are formed, on both sides of the hinge fixing portion is the radial flange weakened portion continuous in the circumferential direction of slits formed in the sealing portion, the A longitudinal weakening line and a circumferential weakening line that are continuous with the radial weakening portion are formed, and the three-point snap hinge includes a central spring hinge and a pair of thin-walled hinges that are located on both sides of the central hinge hinge and serve as a pivotal fulcrum One end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge Fixed on both ends of the tough, hinge cap, characterized in that to fix the other end to the outer lid.

A synthetic resin cap comprising an inner lid having a tubular portion and an outer lid connected to the inner lid via a three-point snap hinge,
The cylindrical portion includes a fitting portion that is press-fitted to the mouth portion of the container, a flange portion that protrudes from the lower end of the fitting portion, and a seal portion that is continuous with the lower surface of the flange portion, On the inner surface of the fitting portion, there is provided an engaging convex portion that engages with an engaging concave portion of the container mouth portion, and the flange portion has a hinge fixing portion for fixing the hinge, and the hinge fixing on one side of the section is formed radially flange weakening, on the inner peripheral side of the hinge fixing portion has a circumferential direction of slits continuous in the radial flange weakening, continuous to the circumferential direction slit circumferential collar weakening lines and are formed, the seal portion, the longitudinal weakening line continuous in the radial flange weakened portion is formed, further wherein the three-point snap hinge is located central spring hinge and on both sides thereof pair and is composed of a pair of thin hinges serving as the rotation fulcrum and disposed in parallel on both sides of the three-point snap hinge Hinge cap, characterized in that one end of the auxiliary band is fixed to both ends of the hinge fixing portion to fix the other end to the outer lid.

The hinge cap according to any one of claims 1 to 4, wherein a ring-shaped convex portion that abuts against the outer surface of the fitting portion is formed on the inner surface of the outer lid when the inner lid is attached to the container mouth portion.