JP2004238025A

JP2004238025A - Cap made of synthetic resin and bottle mounted with this cap made of synthetic resin

Info

Publication number: JP2004238025A
Application number: JP2003028537A
Authority: JP
Inventors: Toru Moriyasu; 透守安; Hiroshi Hamana; 洋浜名
Original assignee: Nihon Yamamura Glass Co Ltd
Current assignee: Nihon Yamamura Glass Co Ltd
Priority date: 2003-02-05
Filing date: 2003-02-05
Publication date: 2004-08-26
Anticipated expiration: 2023-02-05
Also published as: JP4430873B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap made of a synthetic resin which can prevent a packing from falling off from the cap when a plug is opened, and a bottle mounted with this cap made of the synthetic resin. <P>SOLUTION: The cap made of the synthetic resin has a cap body 33 made of the synthetic resin which is screwed on a screw 15 on the outer peripheral face of an opening part 8 of the bottle, a packing 10 made of the synthetic resin for hermetically sealing the opening part 8 of the bottle, and a tamper evidence band 5 integrally connected with the cap body. The cap 1 is a cap with a two-piece structure wherein until a bridge 4 of the cap body is cut off, hermetical sealing of the opening part 8 of the bottle with the packing 10 is held, and at the same time when the bridge 4 is cut off or after the bridge 4 is cut off, the packing is taken upward by an screw end B and a projection 20 of the cap to release the hermetical sealing. The projection 20 is formed on the inner peripheral face M in such a way that it does not interfere to threads 15 of the bottle and at the same height as the terminal height of the screw of the threads 16 and 16a of the cap, and the projection 20 has an upper face 21 coming into contact with the packing 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、ボトル口部に装着される合成樹脂製キャップおよびこの合成樹脂製キャップを装着したボトルに関するものである。
【０００２】
【従来の技術】
【特許文献１】特開２００１−１３０６０６号公報
ボトル口部の外周面に形成されたボトルねじ山と螺合するキャップねじ山を内周面に有する合成樹脂製キャップ本体と、ボトル口部を密封するよう設けられた合成樹脂製のパッキンと、複数個の破断可能なブリッジを介して前記キャップ本体と一体的に連接されたタンパーエビデンスバンドとを有し、キャップ本体に開栓回転方向に回転力を加えて前記ブリッジが切れるまではパッキンによるボトル口部の密封を保持し、前記ブリッジが切れた後に、前記キャップねじ山のねじ終端がパッキンの外周縁部（フランジ部）に下方から当接してパッキンをボトル口部上方に持上げ、気密を解除するよう構成された２ピース構造のピルファープルーフキャップにおいて、パッキンの前記外周縁部に接触するキャップねじ山のねじ終端に接触面積の大きな部分を形成してパッキンがキャップねじ山から抜け落ちるという可能性を低減したものがある（前記特許文献１参照）。
【０００３】
そして、この２ピース構造のキャップは、例えばホットパックのように液体充填後約８５℃の高温処理が付されるボトルの密封に使用されている。この場合、ホットパック後に室温まで冷却された際、充填物の収縮により密封ボトル内が減圧状態となってボトル内部に発生したバキュームによってパッキンをボトル口部に密着させ続けることになる。例えばペットボトルの場合には、ある程度は減圧によりボトルが変形して減圧吸収するので、パッキンをボトル口部に密着させる力（バキューム値）は低下する。
【０００４】
【発明が解決しようとする課題】
しかし、ペットボトルでもその形状によってはバキューム値が高いものがあり、パッキンへの吸引力が強すぎると、キャップねじ山のねじ終端だけではパッキンを持ち上げられずにパッキンがキャップ本体から脱落してしまい、パッキンがボトル口部に残ってしまうおそれがある。
【０００５】
また、６０℃前後に加温した状態でお茶等の飲料を販売することがあるが、加温すると合成樹脂製のパッキンの剛性が下がり、前記ねじ終端がパッキンの前記外周縁部から外れてパッキンがキャップねじ山から脱落し易くなり、パッキンがボトル口部に残ってしまうおそれがある。
【０００６】
更に、ホットパックが付されるボトルがガラスびんの場合には、ボトルが変形せず減圧吸収しないので、バキューム値が高くなり、パッキンがボトル口部に残ってしまうおそれがある。しかも、口径の大きなボトル口部に被せられる広口のキャップになると、バキュームを受ける面積が大きくなり、パッキンがキャップねじ山からより脱落し易くなる。
【０００７】
この発明は、上記問題に鑑みてなしたもので、その目的は、開栓時にパッキンがキャップねじ山から脱落するのを確実に防止できる合成樹脂製キャップおよびこの合成樹脂製キャップを装着したボトルを提供することにある。
【０００８】
【課題を解決するための手段】
上記目的を達成するために、この発明の合成樹脂製キャップは、ボトル口部の外周面に形成されたボトルねじ山と螺合するキャップねじ山を内周面に有する合成樹脂製キャップ本体と、ボトル口部を密封するよう設けられた合成樹脂製のパッキンとを備え、キャップ本体に開栓回転方向に回転力を加えて前記キャップねじ山のねじ終端でパッキンをボトル口部上方に持上げて気密を解除するよう構成された２ピース構造のキャップであって、開栓時にパッキンに当接してボトル口部上方に持上げる突起を、前記ボトルねじ山に干渉しないよう前記内周面に形成するとともに、前記突起は、前記キャップねじ山のねじ終端高さと同じ高さに、パッキンに当接する上面を有することを特徴とする。
【０００９】
また、この発明は別の観点から、ボトル口部の外周面に形成されたボトルねじ山と螺合するキャップねじ山を内周面に有する合成樹脂製キャップ本体と、ボトル口部を密封するよう設けられた合成樹脂製のパッキンと、複数個の破断可能なブリッジを介して前記キャップ本体と一体的に連接されたタンパーエビデンスバンドとを有し、キャップ本体に開栓回転方向に回転力を加えて前記ブリッジが切れるまではパッキンによるボトル口部の密封を保持し、前記ブリッジが切れると同時に、または、前記ブリッジが切れた後にパッキンを、前記キャップねじ山のねじ終端でボトル口部上方に持上げて気密を解除するよう構成された２ピース構造のキャップであって、開栓時に前記ブリッジが切れると同時に、または、前記ブリッジが切れた後にパッキンに当接してパッキンをボトル口部上方に持上げる突起を、前記ボトルねじ山に干渉しないよう前記内周面に形成するとともに、前記突起は、前記キャップねじ山のねじ終端高さと同じ高さに、パッキンに当接する上面を有することを特徴とする合成樹脂製キャップを提供する。
【００１０】
また、この発明は更に別の観点から、ボトル口部の外周面に形成されたボトルねじ山と螺合するキャップねじ山を内周面に有する合成樹脂製キャップ本体と、ボトル口部を密封するよう設けられた合成樹脂製のパッキンとを備え、キャップ本体に開栓回転方向に回転力を加えて前記キャップねじ山のねじ終端でパッキンをボトル口部上方に持上げて気密を解除するよう構成された２ピース構造のキャップであって、開栓時にパッキンに当接してパッキンをボトル口部上方に持上げるよう、かつ、前記ボトルねじ山に干渉しないよう、前記キャップねじ山のようなねじの機能を持たない突起を前記内周面における前記キャップねじ山のねじ終端の下流側に形成するように構成したことを特徴とする合成樹脂製キャップを提供する。
【００１１】
更に、この発明は別の観点から、ボトル口部の外周面に形成されたボトルねじ山と螺合するキャップねじ山を内周面に有する合成樹脂製キャップ本体と、ボトル口部を密封するよう設けられた合成樹脂製のパッキンと、複数個の破断可能なブリッジを介して前記キャップ本体と一体的に連接されたタンパーエビデンスバンドとを有し、キャップ本体に開栓回転方向に回転力を加えて前記ブリッジが切れるまではパッキンによるボトル口部の密封を保持し、前記ブリッジが切れると同時に、または、前記ブリッジが切れた後にパッキンを、前記キャップねじ山のねじ終端でボトル口部上方に持上げて気密を解除するよう構成された２ピース構造のキャップであって、開栓時に前記ブリッジが切れると同時に、または、前記ブリッジが切れた後にパッキンに当接してパッキンをボトル口部上方に持上げるよう、かつ、前記ボトルねじ山に干渉しないよう、前記キャップねじ山のようなねじの機能を持たない突起を前記内周面における前記キャップねじ山のねじ終端の下流側に形成するように構成したことを特徴とする合成樹脂製キャップを提供する。
【００１２】
また、この発明は、前記合成樹脂製キャップをボトル口部に装着してあることを特徴とするボトルを提供する。
【００１３】
【発明の実施の形態】
以下、この発明の実施形態について説明する。
図１〜図４は、パッキンをボトル口部上方に持上げる突起を、ボトルねじ山に干渉しないようキャップねじ山のねじ切り終わり部分の高さと同じ高さ位置に一つ設けたこの発明の第１の実施形態を示す。この実施形態の合成樹脂製キャップはピルファープルーフキャップである。
【００１４】
図１〜図４において、合成樹脂製ピルファープルーフキャップ１は、平面視円形の天板部２と、天板部２の周縁から垂下されたスカート壁３と、スカート壁３の下端に形成される破断可能な複数個のブリッジ４と、ブリッジ４を介してスカート壁３に接続されたタンパーエビデンスバンド（ＴＥバンド）５と、ＴＥバンド５の下端から内方に折り返された抜け止め用の係止部材６と、ペットボトル本体７の開口部よりなるボトル口部８を密封するよう設けられた平面視円形で合成樹脂製のパッキン１０とを主として有する。そして、天板部２とスカート壁３でキャップ本体３３が構成される。また、係止部材６は、たとえば連続蛇腹状に形成されて、ボトル口部８の下部外周に突設された掛止突縁（ビード）９に下方から係止し、キャップ本体３３に開栓回転方向に回転力を加えてブリッジ４が破断されるときにＴＥバンド５を抜け止め状に保持する〔図４（Ｂ）参照〕。
【００１５】
前記パッキン１０は、ペットボトル本体７内の気密性を向上させるためにボトル口部８内に密嵌挿入される所定長さの環状の中足１２を有し、かつパッキン１０の天面１３の外周縁には環状のフランジ部１４が突設形成されている。
【００１６】
また、前記スカート壁３は、内周面Ｍに、ボトル口部８の外周面Ｎに形成された螺旋状のボトルねじ山１５と螺合するよう、下側から上側に向かって螺旋状に間隔を有する形で形成された複数個のキャップねじ山１６，…，１６，１６ａを有する。キャップねじ山１６，…，１６，１６ａは、それぞれ、スカート壁３の内周面Ｍから径方向に突出する山型形状の縦断面を有し、かつ、横断面略円弧状の突起で構成されており、この実施形態では、図３（Ｂ）に示すように、円周方向に複数種の異なる長さを有する。
【００１７】
前記キャップねじ山１６ａは、最上端に位置するキャップねじ山である。すなわち、前記最上端に位置するキャップねじ山１６ａは、上流端Ａに隣接してキャップねじ山１６を有する一方、キャップねじ山１６ａの下流端Ｂは、ねじ切り終わり位置の部分、すなわち、キャップねじ山１６，…，１６，１６ａのねじ終端となっている。そして、前記ピルファープルーフキャップ１とペットボトル本体７とで前記ピルファープルーフキャップ１キャップを装着したペットボトル７７が構成される。
【００１８】
以下、特徴的構成について説明する。
【００１９】
２０は、開栓時に前記ブリッジが切れた後にパッキン１０のフランジ部１４に当接し、キャップねじ山１６，…，１６，１６ａの前記ねじ終端（キャップねじ山１６ａの下流端）Ｂとでパッキン１０をボトル口部８上方に持上げて気密を解除しうる突起である。
【００２０】
この突起２０は、前記ボトルねじ山１５に干渉しないようスカート壁３の内周面Ｍで、キャップねじ山１６ａの下流端（キャップねじ山１６，…，１６，１６ａの前記ねじ終端）Ｂから下流側に適宜間隔Ｓを有して形成されている。更に、前記突起２０は、前記キャップねじ山１６ａのねじ終端Ｂの高さｈと同じ高さＨ（＝ｈ）に、パッキン１０のフランジ部１４に当接する上面２１を有する。したがって、この突起２０は、ねじとしての機能を持ってはいない。
また、前記上面２１をパッキン１０のフランジ部１４の下面と平行となるように形成するのが好ましい。
【００２１】
すなわち、前記突起２０は、横断面略円弧状で、かつ、縦断面がキャップねじ山１６，…，１６，１６ａと同様にスカート壁３の内周面Ｍから径方向に突出した状態の山型形状をなし、スカート壁３と一体に設けてある。前記突起２０は、内周面Ｍとの付け根Ｃから下向きに傾斜した前記上面２１と、この上面２１から下方に連設された突出内周面２２およびこの突出内周面２２から下向きに傾斜して内周面Ｍとの付け根Ｄに至る下面２３を、上から順に有する。
【００２２】
一方、最上端に位置する前記キャップねじ山１６ａは、内周面Ｍとの付け根Ｃ’から下向きに傾斜した上面２１’と、この上面２１’から下方に連設された突出内周面２２’およびこの突出内周面２２’から下向きに傾斜して内周面Ｍとの付け根Ｄ’に至る下面２３’を、上から順に有する。
【００２３】
そして、前記ねじ終端Ｂの高さｈとは、天板部２の天面２ａおよびキャップねじ山１６ａの上面２１’間の間隔であり、また、高さＨは、天面２ａおよび前記上面２１間の間隔である。
【００２４】
而して、図４（Ａ）に示す初期状態から、キャップ本体２３に開栓回転方向に回転力を加えて行くと、図４（Ｂ）に示すように、まず、ブリッジ４が破断する。ここで、初期状態から、キャップ本体３３に開栓回転方向に回転力を加えて前記ブリッジ４が切れるまではパッキン１０によるボトル口部８の密封が保持されている。
【００２５】
前記ブリッジ４が切れた後には、図４（Ｃ）に示すようにパッキン１０のフランジ部１４の下面１４ａに突起２０の上面２１が当接し、前記ねじ終端Ｂの前記上面２１’との二箇所でパッキン１０をボトル口部８上方に確実に持上げることができる。
【００２６】
このため、ブリッジ４が破断されてからパッキン１０が持ち上げられて開栓され気密が解除されるまでの前記キャップ１の回転角度（シール解除角度）はおよそ一定のものとなり、安定した開栓を行うことが可能となる。
【００２７】
すなわち、この発明のピルファープルーフキャップ１によれば、初期状態からブリッジ４が破断するまでの前記キャップ１の回転角度（ブリッジ破断角度）と、初期状態からパッキン１０が持ち上げられ開栓されるまでの前記キャップ１の回転角度（シール解除角度）との相対的な関係が保証されることになる。
【００２８】
この実施形態では、前記突起２０の上面２１が下方に傾斜した傾斜面となっているが、この発明では、前記突起２０の上面２１を平坦面とするなど異なる形状のものでも、上面２１の位置を、ねじ終端Ｂの高さｈと同じ高さＨ（＝ｈ）の位置に設定することで、開栓時にブリッジ４が切れた後にパッキン１０のフランジ部１４に当接し、前記ねじ終端Ｂとでパッキン１０をボトル口部８上方に確実に持上げることができ、パッキン１０がキャップ本体３３から脱落してしまい、パッキン１０がボトル口部８に残ってしまう事態を回避できる。
【００２９】
図５（Ａ）、図５（Ｂ）は、複数個の突起２０、例えば、三個の突起２０ａ，２０ｂ，２０ｃを設けて、前記ねじ終端Ｂとの四箇所でパッキン１０をボトル口部８上方に持上げるように構成したこの発明の第２の実施形態を示す。
【００３０】
図５（Ａ）、図５（Ｂ）において、図１〜図４で示した符号と同一のものは、同一または相当物である。
【００３１】
図５（Ａ）、図５（Ｂ）において、三個の突起２０ａ，２０ｂ，２０ｃは、いずれも前記突起２０と同一構造である。これら突起２０ａ，２０ｂ，２０ｃのうち突起２０ａは、前記ボトルねじ山１５に干渉しないようスカート壁３の内周面Ｍで、キャップねじ山１６ａの下流端Ｂから下流側に適宜間隔Ｓ_１を有して形成されている。更に、前記突起２０ａは、前記キャップねじ山１６ａのねじ終端Ｂの高さｈと同じ高さＨ（＝ｈ）に、パッキン１０のフランジ部１４に当接する上面２１ａを有する。
【００３２】
突起２０ｂは、前記ボトルねじ山１５に干渉しないようスカート壁３の内周面Ｍで、突起２０ａの下流端Ｂ’から下流側に適宜間隔Ｓ_２を有して形成されている。更に、前記突起２０ｂは、前記キャップねじ山１６ａのねじ終端Ｂの高さｈと同じ高さＨ（＝ｈ）に、パッキン１０のフランジ部１４に当接する上面２１ｂを有する。
【００３３】
突起２０ｃは、前記ボトルねじ山１５に干渉しないようスカート壁３の内周面Ｍで、突起２０ｂの下流端Ｂ’’から下流側に適宜間隔Ｓ_３を有して形成されている。更に、前記突起２０ｃは、前記キャップねじ山１６ａのねじ終端Ｂの高さｈと同じ高さＨ（＝ｈ）に、パッキン１０のフランジ部１４に当接する上面２１ｃを有する。
このように、複数個の突起２０ａ，２０ｂ，２０ｃを設けることで、突起２０ａ，２０ｂ，２０ｃのうちの仮に一つの突起の山をパッキン１０が乗り越えても、残りの別の突起がパッキン１０を支え、パッキン１０がキャップ本体３３から完全に脱落することを防止できる。
【００３４】
図６（Ａ）、図６（Ｂ）は、キャップねじ山のようなねじの機能を持たない前記突起２０と同一構造の突起２０’を前記キャップねじ山１６ａのねじ終端Ｂに連設したこの発明の第３の実施形態を示す。図６（Ａ）、図６（Ｂ）において、図１〜図５で示した符号と同一のものは、同一または相当物である。
【００３５】
この場合、突起２０’は、キャップねじ山１６ａのねじ終端Ｂから下流側に連設してある。
【００３６】
また、突起２０’の上面２１の位置を、ねじ終端Ｂの高さｈと同じ高さＨ（＝ｈ）の位置に設定してあるとともに、前記上面２１をパッキン１０のフランジ部１４の下面と平行となるように形成してある。
【００３７】
而して、開栓時には、キャップねじ山１６ａのねじ終端Ｂに連設した、キャップねじ山１６のようなねじの機能を持たない突起２０’の上面２１がパッキン１０のフランジ部１４の下面１４ａに当接してパッキン１０を押し上げるが、前記上面２１をパッキン１０のフランジ部１４の下面１４ａと平行となるように形成したことから、突起２０’の上面２１とパッキン１０のフランジ部１４の下面１４ａとの接触が、キャップねじ山のねじ終端Ｂだけでパッキンをボトル口部上方に持上げていたときのような点接触よりも接触面積が大きい面接触となる。すなわち、キャップねじ山１６ａのねじ終端部分Ｂと突起２０’とでパッキン１０をボトル口部８上方に持上げることができる。これにより、キャップ１は、開栓時に、ほぼ平行にかつがたつくことなく上方に上がっていくことになる。このため、ブリッジ４が破断されてからパッキン１０が持ち上げられて開栓されるまでのキャップ１の回転角度（シール解除角度）はおよそ一定のものとなり、安定した開栓を行うことが可能となる。
【００３８】
また、パッキン１０のフランジ部１４の下面１４ａに接触するキャップ１の突起２０’の上面２１の面積が大きくなることから、パッキン１０がキャップ１のキャップねじ山１６から抜け落ちるという可能性を極めて低くすることが可能となる。
【００３９】
なお、上記各実施形態ではピルファープルーフキャップについて説明したが、この発明は、タンパーエビデンス性能（ＴＥ性能）を持たないキャップにも適用できる。
【００４０】
また、この発明は、ガラスびんで構成されたボトル本体を持つボトルにも適用できることは勿論である。
【００４１】
【発明の効果】
以上説明したようにこの発明では、合成樹脂製キャップ本体と合成樹脂製のパッキンとを備えた２ピース構造のキャップにおいて、開栓時にパッキンがキャップねじ山から脱落するのを確実に防止できる合成樹脂製キャップおよびこの合成樹脂製キャップを装着したボトルを提供することができる。
【図面の簡単な説明】
【図１】この発明の第１の実施形態の使用状態を示すとともに、要部を拡大して示す構成説明図である。
【図２】上記実施形態を示す全体構成説明図である。
【図３】（Ａ）は、上記実施形態を示す要部構成説明図である。
（Ｂ）は、図３（Ａ）におけるａ−ａ線断面図である。
【図４】（Ａ）は、開栓前の状態を示す要部構成説明図である。
（Ｂ）は、開栓時の初期状態を示す要部構成説明図である。
（Ｃ）は、開栓時の最終状態を示す要部構成説明図である。
【図５】（Ａ）は、この発明の第２の実施形態を示す要部構成説明図である。
（Ｂ）は、図５（Ａ）におけるｂ−ｂ線断面図である。
【図６】（Ａ）は、この発明の第３の実施形態を示す要部構成説明図である。
（Ｂ）は、図６（Ａ）におけるｃ−ｃ線断面図である。
【符号の説明】
１…合成樹脂製キャップ、４…ブリッジ、５…タンパーエビデンスバンド、８…ボトル口部、７…ペットボトル本体、１０…合成樹脂製のパッキン、１５…ボトルねじ山、１６，１６ａ…キャップねじ山、２０…突起、２１…上面、３３…合成樹脂製キャップ本体、７７…ペットボトル、Ｂ…キャップねじ山のねじ終端、Ｍ…内周面。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin cap attached to a bottle mouth portion and a bottle equipped with the synthetic resin cap.
[0002]
[Prior art]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-130606 A cap body made of a synthetic resin having an inner peripheral surface with a cap screw threaded to a bottle screw thread formed on an outer peripheral surface of a bottle mouth portion, and the bottle mouth portion sealed And a tamper-evidence band integrally connected to the cap body through a plurality of breakable bridges, and the cap body has a rotational force in the opening rotation direction. Until the bridge is cut and the bottle mouth is kept sealed by the packing. After the bridge is cut, the screw end of the cap thread comes into contact with the outer peripheral edge (flange) of the packing from below. In the two-piece pilfer proof cap configured to lift the packing above the bottle mouth and release the airtightness, the outer peripheral edge of the packing Packing to form a large part of the contact area on the threaded end of the cap threads to touch there is obtained by reducing the possibility that fall out of the cap thread (the Patent Document 1).
[0003]
The two-piece cap is used to seal a bottle that is subjected to a high-temperature treatment of about 85 ° C. after liquid filling, for example, like a hot pack. In this case, when the bottle is cooled to room temperature after the hot pack, the inside of the sealed bottle is depressurized due to the shrinkage of the filling, and the packing is kept in close contact with the bottle mouth by the vacuum generated inside the bottle. For example, in the case of a PET bottle, since the bottle is deformed and absorbed by decompression to some extent, the force (vacuum value) for bringing the packing into close contact with the bottle mouth portion decreases.
[0004]
[Problems to be solved by the invention]
However, some plastic bottles have high vacuum values depending on their shape, and if the suction force to the packing is too strong, the packing will fall off the cap body without being able to lift the packing only with the screw end of the cap thread. The packing may remain in the bottle mouth.
[0005]
In addition, tea and other beverages may be sold in a heated state around 60 ° C., but when heated, the rigidity of the packing made of synthetic resin decreases, and the screw end is detached from the outer peripheral edge of the packing. May easily fall off the cap thread, and the packing may remain in the bottle mouth.
[0006]
Furthermore, when the bottle to which the hot pack is attached is a glass bottle, the bottle is not deformed and does not absorb under reduced pressure, so that the vacuum value becomes high and the packing may remain in the bottle mouth. In addition, when the cap has a wide mouth that covers the bottle mouth portion having a large diameter, the area for receiving the vacuum is increased, and the packing is more easily detached from the cap thread.
[0007]
The present invention has been made in view of the above problems, and its purpose is to provide a synthetic resin cap that can reliably prevent the packing from falling off the cap thread when the cap is opened, and a bottle equipped with the synthetic resin cap. It is to provide.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the synthetic resin cap of the present invention is a synthetic resin cap body having a cap screw thread on the inner peripheral surface that is screwed with a bottle screw thread formed on the outer peripheral surface of the bottle mouth, And a synthetic resin packing provided to seal the bottle mouth, applying a rotational force to the cap body in the opening rotation direction, lifting the packing above the bottle mouth at the screw thread end of the cap thread, and airtight A cap having a two-piece structure, which is configured to release the bottle, and has a protrusion on the inner peripheral surface so as not to interfere with the bottle screw thread when contacting the packing when opening the cap and lifting the bottle upper portion upward. The protrusion has an upper surface that contacts the packing at the same height as the screw end height of the cap thread.
[0009]
From another viewpoint, the present invention seals the bottle mouth portion with a synthetic resin cap main body having a cap screw thread on the inner peripheral surface that is screwed with a bottle screw thread formed on the outer peripheral surface of the bottle mouth portion. It has a synthetic resin packing provided and a tamper evidence band integrally connected to the cap body through a plurality of breakable bridges, and applies a rotational force to the cap body in the opening rotation direction. Until the bridge is broken, the seal of the bottle mouth is maintained by packing, and at the same time as the bridge is broken or after the bridge is broken, the packing is lifted above the bottle mouth at the screw end of the cap thread. A two-piece cap configured to release airtightness when the bridge is broken at the time of opening or after the bridge is broken A protrusion that abuts against the packing and lifts the packing above the bottle mouth is formed on the inner peripheral surface so as not to interfere with the bottle thread, and the protrusion is the same height as the screw end height of the cap thread. Further, the present invention provides a synthetic resin cap characterized by having an upper surface that comes into contact with the packing.
[0010]
Further, according to another aspect of the present invention, the bottle mouth portion is sealed with a synthetic resin cap body having a cap screw thread on the inner peripheral surface that is screwed with a bottle screw thread formed on the outer peripheral surface of the bottle mouth portion. And a seal made of synthetic resin, and is configured to release the airtightness by applying a rotational force to the cap body in the opening rotation direction and lifting the packing above the bottle mouth at the screw end of the cap thread. A two-piece structure cap that functions as a screw like the cap thread so as to abut against the packing when it is opened to lift the packing above the bottle mouth and not interfere with the bottle thread. Provided is a synthetic resin cap characterized in that a projection not having a protrusion is formed on the inner peripheral surface downstream of the screw end of the cap thread.
[0011]
Further, according to another aspect of the present invention, a cap body made of a synthetic resin having an inner peripheral surface with a cap screw threaded to a bottle screw thread formed on the outer peripheral surface of the bottle mouth portion, and the bottle mouth portion are sealed. It has a synthetic resin packing provided and a tamper evidence band integrally connected to the cap body through a plurality of breakable bridges, and applies a rotational force to the cap body in the opening rotation direction. Until the bridge is broken, the seal of the bottle mouth is maintained by packing, and at the same time as the bridge is broken or after the bridge is broken, the packing is lifted above the bottle mouth at the screw end of the cap thread. A two-piece cap configured to release airtightness when the bridge is broken at the time of opening or after the bridge is broken The cap screw on the inner peripheral surface has a protrusion that does not have a screw function, such as the cap screw thread, so as to lift the packing above the bottle mouth by contacting the packing and not to interfere with the bottle screw thread. Provided is a synthetic resin cap characterized in that the cap is formed on the downstream side of a thread end of a mountain.
[0012]
The present invention also provides a bottle characterized in that the synthetic resin cap is attached to a bottle mouth.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
1 to 4 show a first embodiment of the present invention in which one protrusion for lifting the packing above the bottle mouth portion is provided at the same height as the threading end portion of the cap thread so as not to interfere with the bottle thread. The embodiment of is shown. The synthetic resin cap of this embodiment is a pilfer proof cap.
[0014]
1 to 4, a synthetic resin pilfer-proof cap 1 is formed on a top plate portion 2 having a circular shape in plan view, a skirt wall 3 suspended from the periphery of the top plate portion 2, and a lower end of the skirt wall 3. A plurality of breakable bridges 4, a tamper evidence band (TE band) 5 connected to the skirt wall 3 via the bridges 4, and a retaining member folded inward from the lower end of the TE band 5. The stopper member 6 mainly includes a packing 10 made of a synthetic resin in a circular shape in plan view provided so as to seal a bottle mouth portion 8 formed of an opening portion of the plastic bottle main body 7. The top plate 2 and the skirt wall 3 constitute a cap body 33. Further, the locking member 6 is formed in, for example, a continuous bellows shape, and is locked from below to a hooking protrusion (bead) 9 protruding from the lower outer periphery of the bottle mouth portion 8, and the cap body 33 is opened. When the bridge 4 is broken by applying a rotational force in the rotational direction, the TE band 5 is held in a retaining manner (see FIG. 4B).
[0015]
The packing 10 has an annular middle leg 12 of a predetermined length that is tightly inserted into the bottle mouth 8 in order to improve the airtightness in the PET bottle main body 7, and the top surface 13 of the packing 10. An annular flange portion 14 is formed to project from the outer peripheral edge.
[0016]
Further, the skirt wall 3 is spirally spaced from the lower side to the upper side so as to be screwed to the inner peripheral surface M with the spiral bottle thread 15 formed on the outer peripheral surface N of the bottle mouth portion 8. Have a plurality of cap threads 16,..., 16, 16a. Each of the cap threads 16,..., 16, 16 a has a mountain-shaped longitudinal section projecting radially from the inner peripheral surface M of the skirt wall 3, and is configured by a projection having a substantially arcuate cross section. In this embodiment, as shown in FIG. 3 (B), a plurality of different lengths are provided in the circumferential direction.
[0017]
The cap thread 16a is a cap thread located at the uppermost end. That is, the cap thread 16a located at the uppermost end has a cap thread 16 adjacent to the upstream end A, while the downstream end B of the cap thread 16a is a portion of the threading end position, ie, the cap thread. 16,..., 16 and 16a. The pill fur proof cap 1 and the plastic bottle main body 7 constitute a plastic bottle 77 fitted with the pill fur proof cap 1 cap.
[0018]
Hereinafter, a characteristic configuration will be described.
[0019]
20 is in contact with the flange portion 14 of the packing 10 after the bridge is cut at the time of opening, and the packing 10 is connected to the screw end (downstream end of the cap thread 16a) B of the cap threads 16,. Is a protrusion that can be lifted above the bottle mouth 8 to release airtightness.
[0020]
This protrusion 20 is downstream from the downstream end of the cap screw thread 16a (the screw terminal end of the cap screw threads 16, ..., 16a) B on the inner peripheral surface M of the skirt wall 3 so as not to interfere with the bottle screw thread 15. It is formed with an appropriate interval S on the side. Further, the protrusion 20 has an upper surface 21 that contacts the flange portion 14 of the packing 10 at the same height H (= h) as the height h of the screw end B of the cap thread 16a. Therefore, this protrusion 20 does not have a function as a screw.
The upper surface 21 is preferably formed so as to be parallel to the lower surface of the flange portion 14 of the packing 10.
[0021]
That is, the projection 20 has a substantially arc shape in cross section and a chevron shape in which the vertical cross section projects radially from the inner peripheral surface M of the skirt wall 3 in the same manner as the cap screw threads 16,. It has a shape and is provided integrally with the skirt wall 3. The protrusion 20 inclines downward from the base C with the inner peripheral surface M, the projecting inner peripheral surface 22 connected downward from the upper surface 21, and the projecting inner peripheral surface 22. Thus, the lower surface 23 reaching the base D with the inner peripheral surface M is provided in order from the top.
[0022]
On the other hand, the cap thread 16a located at the uppermost end includes an upper surface 21 'inclined downward from a base C' with the inner peripheral surface M, and a projecting inner peripheral surface 22 'continuously provided downward from the upper surface 21'. In addition, a lower surface 23 ′ is formed in order from the top, which is inclined downward from the projecting inner peripheral surface 22 ′ and reaches the root D ′ with the inner peripheral surface M.
[0023]
The height h of the screw terminal B is the distance between the top surface 2a of the top plate portion 2 and the top surface 21 'of the cap screw thread 16a, and the height H is the top surface 2a and the top surface 21. Is the interval between.
[0024]
Thus, when a rotational force is applied to the cap body 23 in the opening rotation direction from the initial state shown in FIG. 4 (A), the bridge 4 is first broken as shown in FIG. 4 (B). Here, from the initial state, until the bridge 4 is cut by applying a rotational force to the cap body 33 in the opening rotation direction, the sealing of the bottle mouth 8 by the packing 10 is maintained.
[0025]
After the bridge 4 is cut, the upper surface 21 of the protrusion 20 comes into contact with the lower surface 14a of the flange portion 14 of the packing 10 as shown in FIG. Thus, the packing 10 can be reliably lifted above the bottle mouth 8.
[0026]
For this reason, the rotation angle (seal release angle) of the cap 1 from when the bridge 4 is broken to when the packing 10 is lifted and opened to release the airtightness is approximately constant, so that stable opening is performed. It becomes possible.
[0027]
That is, according to the pilfer-proof cap 1 of the present invention, the rotation angle (bridge break angle) of the cap 1 from the initial state until the bridge 4 is broken and the packing 10 is lifted and opened from the initial state. The relative relationship with the rotation angle (seal release angle) of the cap 1 is ensured.
[0028]
In this embodiment, the upper surface 21 of the protrusion 20 is an inclined surface inclined downward. However, in the present invention, even if the upper surface 21 of the protrusion 20 is a flat surface, the shape of the upper surface 21 may be different. Is set at a position having the same height H (= h) as the height h of the screw end B, so that the bridge 4 is cut off at the time of opening and then comes into contact with the flange portion 14 of the packing 10. Thus, the packing 10 can be reliably lifted above the bottle mouth 8, and the situation where the packing 10 falls off the cap body 33 and the packing 10 remains in the bottle mouth 8 can be avoided.
[0029]
5 (A) and 5 (B), a plurality of protrusions 20, for example, three protrusions 20a, 20b, and 20c are provided, and the packing 10 is connected to the bottle mouth 8 at four locations with the screw terminal B. A second embodiment of the present invention configured to be lifted upward is shown.
[0030]
5A and 5B, the same reference numerals as those shown in FIGS. 1 to 4 are the same or equivalent.
[0031]
5A and 5B, all of the three protrusions 20a, 20b, and 20c have the same structure as the protrusion 20 described above. These projections 20a, 20b, the projections 20a of the 20c is the inner circumferential surface M of the skirt wall 3 so as not to interfere with the bottle threads 15, have the appropriate intervals _{S 1} to the downstream side from the downstream end B of the cap thread 16a Is formed. Further, the protrusion 20a has an upper surface 21a that contacts the flange portion 14 of the packing 10 at the same height H (= h) as the height h of the screw end B of the cap thread 16a.
[0032]
Projection 20b is in the inner peripheral surface M of the skirt wall 3 so as not to interfere with the bottle threads 15 are formed with an appropriate spacing S ₂ on the downstream side from the downstream end B 'of the protrusion 20a. Further, the protrusion 20b has an upper surface 21b that contacts the flange portion 14 of the packing 10 at the same height H (= h) as the height h of the screw end B of the cap thread 16a.
[0033]
Projection 20c is in the inner peripheral surface M of the skirt wall 3 so as not to interfere with the bottle threads 15 are formed with an appropriate spacing S ₃ downstream from the downstream end B '' of the projection 20b. Further, the protrusion 20c has an upper surface 21c that contacts the flange portion 14 of the packing 10 at the same height H (= h) as the height h of the screw end B of the cap thread 16a.
In this way, by providing the plurality of protrusions 20a, 20b, and 20c, even if the packing 10 gets over the peak of one of the protrusions 20a, 20b, and 20c, the remaining other protrusions will seal the packing 10. It is possible to prevent the packing 10 from coming off the cap body 33 completely.
[0034]
6 (A) and 6 (B) show that a protrusion 20 ′ having the same structure as the protrusion 20 having no screw function such as a cap screw thread is connected to the screw end B of the cap screw thread 16a. 3 shows a third embodiment of the invention. 6A and 6B, the same reference numerals as those shown in FIGS. 1 to 5 are the same or equivalent.
[0035]
In this case, the protrusion 20 ′ is connected downstream from the screw end B of the cap screw thread 16a.
[0036]
Further, the position of the upper surface 21 of the protrusion 20 ′ is set to the same height H (= h) as the height h of the screw terminal B, and the upper surface 21 is connected to the lower surface of the flange portion 14 of the packing 10. It is formed to be parallel.
[0037]
Thus, when the cap is opened, the upper surface 21 of the protrusion 20 ′ that does not have a screw function like the cap screw thread 16 connected to the screw terminal B of the cap screw thread 16 a is the lower surface 14 a of the flange portion 14 of the packing 10. The upper surface 21 is formed so as to be parallel to the lower surface 14 a of the flange portion 14 of the packing 10, so that the upper surface 21 of the protrusion 20 ′ and the lower surface 14 a of the flange portion 14 of the packing 10 are pushed up. Contact is a surface contact having a larger contact area than a point contact when the packing is lifted above the bottle mouth only by the screw end B of the cap thread. That is, the packing 10 can be lifted above the bottle mouth 8 by the screw end portion B of the cap thread 16a and the protrusion 20 ′. As a result, the cap 1 rises upward in a substantially parallel manner without rattling when the cap is opened. For this reason, the rotation angle (seal release angle) of the cap 1 from when the bridge 4 is broken to when the packing 10 is lifted and opened is approximately constant, and stable opening is possible. .
[0038]
Further, since the area of the upper surface 21 of the protrusion 20 ′ of the cap 1 that contacts the lower surface 14 a of the flange portion 14 of the packing 10 increases, the possibility that the packing 10 falls off from the cap thread 16 of the cap 1 is extremely reduced. It becomes possible.
[0039]
In addition, although each said embodiment demonstrated the pilfer proof cap, this invention is applicable also to the cap which does not have a tamper evidence performance (TE performance).
[0040]
Of course, the present invention can also be applied to a bottle having a bottle body formed of a glass bottle.
[0041]
【The invention's effect】
As described above, according to the present invention, in the two-piece structure cap including the synthetic resin cap body and the synthetic resin packing, the synthetic resin can reliably prevent the packing from falling off the cap thread when the cap is opened. It is possible to provide a bottle with the cap and the synthetic resin cap.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration explanatory diagram showing a use state of a first embodiment of the present invention and an enlarged main part.
FIG. 2 is an explanatory diagram of an overall configuration showing the embodiment.
FIG. 3A is an explanatory diagram of a main part configuration showing the embodiment.
(B) is the sectional view on the aa line in FIG. 3 (A).
FIG. 4A is an explanatory diagram of a main part configuration showing a state before opening. FIG.
(B) is principal part structure explanatory drawing which shows the initial state at the time of opening.
(C) is principal part structure explanatory drawing which shows the final state at the time of opening.
FIG. 5 (A) is an explanatory diagram of a main part configuration showing a second embodiment of the present invention.
FIG. 5B is a cross-sectional view taken along the line bb in FIG.
FIG. 6 (A) is an explanatory diagram of a main part configuration showing a third embodiment of the present invention.
(B) is the cc sectional view taken on the line in FIG. 6 (A).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Synthetic resin cap, 4 ... Bridge, 5 ... Tamper evidence band, 8 ... Bottle mouth part, 7 ... Plastic bottle main body, 10 ... Synthetic resin packing, 15 ... Bottle screw thread, 16, 16a ... Cap screw thread , 20 ... projection, 21 ... upper surface, 33 ... synthetic resin cap body, 77 ... plastic bottle, B ... screw end of cap screw thread, M ... inner peripheral surface.

Claims

A synthetic resin cap body having a cap thread threaded on a bottle thread formed on the outer peripheral surface of the bottle mouth portion on the inner peripheral surface, and a synthetic resin packing provided to seal the bottle mouth portion. A cap having a two-piece structure, which is configured to release airtightness by applying a rotational force to the cap body in the opening rotation direction to lift the packing above the bottle mouth at the screw end of the cap thread. A protrusion that abuts on the packing and lifts above the bottle mouth at the time of plugging is formed on the inner peripheral surface so as not to interfere with the bottle thread, and the protrusion is the same height as the screw end height of the cap thread. And a synthetic resin cap characterized by having an upper surface that contacts the packing.

A synthetic resin cap body having a cap screw threaded on a bottle screw thread formed on the outer peripheral surface of the bottle mouth portion on the inner peripheral surface, and a synthetic resin packing provided to seal the bottle mouth portion; A tamper-evidence band integrally connected to the cap body via a plurality of breakable bridges, and a bottle made of packing until the bridge is cut by applying rotational force to the cap body in the opening rotation direction. 2 configured to release the airtightness by holding the seal of the mouth and lifting the packing above the bottle mouth at the screw end of the cap screw thread at the same time when the bridge is cut or after the bridge is cut It is a piece-structured cap, and when the bridge is cut at the time of opening, or after the bridge is cut, the packing is abutted against the packing and A protrusion to be lifted above the mouth portion is formed on the inner peripheral surface so as not to interfere with the bottle thread, and the protrusion is at the same height as the thread end height of the cap thread and is in contact with the packing. A synthetic resin cap characterized by comprising:

A synthetic resin cap body having a cap thread threaded on a bottle thread formed on the outer peripheral surface of the bottle mouth portion on the inner peripheral surface, and a synthetic resin packing provided to seal the bottle mouth portion. A cap having a two-piece structure, which is configured to release airtightness by applying a rotational force to the cap body in the opening rotation direction to lift the packing above the bottle mouth at the screw end of the cap thread. A protrusion that does not have a screw function such as the cap screw thread is formed on the inner peripheral surface so as to lift the packing above the bottle mouth by contacting the packing at the time of plugging and not to interfere with the bottle screw thread. A synthetic resin cap configured to be formed on the downstream side of the screw end of the cap screw thread.

A synthetic resin cap body having a cap screw threaded on a bottle screw thread formed on the outer peripheral surface of the bottle mouth portion on the inner peripheral surface, and a synthetic resin packing provided to seal the bottle mouth portion; A tamper-evidence band integrally connected to the cap body via a plurality of breakable bridges, and a bottle made of packing until the bridge is cut by applying rotational force to the cap body in the opening rotation direction. 2 configured to release the airtightness by holding the seal of the mouth and lifting the packing above the bottle mouth at the screw end of the cap screw thread at the same time when the bridge is cut or after the bridge is cut It is a piece-structured cap, and when the bridge is cut at the time of opening, or after the bridge is cut, the packing is abutted against the packing and A protrusion having no screw function such as the cap screw thread on the inner peripheral surface downstream of the screw end of the cap screw thread so as to be lifted above the screw mouth and not to interfere with the bottle screw thread. A synthetic resin cap, characterized in that it is configured to be formed into a.

The synthetic resin according to any one of claims 1 to 4, wherein the protrusion is configured to abut against the packing when the cap is opened, and to lift the packing above the bottle mouth with the screw end of the cap thread. Made of cap.

The synthetic resin cap according to any one of claims 1 to 5, wherein the protrusion comprises a protrusion having a substantially arc-shaped cross section formed integrally with the cap body or separately.

A bottle having the synthetic resin cap according to any one of claims 1 to 6 attached to a bottle mouth portion.