JP4502088B2 - Container mouth and screw cap - Google Patents

Container mouth and screw cap Download PDF

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Publication number
JP4502088B2
JP4502088B2 JP36933199A JP36933199A JP4502088B2 JP 4502088 B2 JP4502088 B2 JP 4502088B2 JP 36933199 A JP36933199 A JP 36933199A JP 36933199 A JP36933199 A JP 36933199A JP 4502088 B2 JP4502088 B2 JP 4502088B2
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Japan
Prior art keywords
cap
container mouth
groove
container
guide groove
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JP36933199A
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JP2001180709A (en
Inventor
恒久 並木
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Toyo Seikan Kaisha Ltd
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Toyo Seikan Kaisha Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3442Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、瓶等容器の口部と該容器の封止のために組み合わされるキャップに関するものである。
【0002】
【従来の技術】
従来、容器口部と該口部に対し取り外し可能に嵌合されたキャップ部材間の容器封止機構は、図5に示されるような一般に円筒状の容器口部1外周に螺旋状につけられた凸条6と、天板21と該天板周縁部から垂下した円筒状スカート部からなるキャップ2の内周面に螺旋状につけられた凸条間の凹部7とが螺合する形態となっている。この種の容器の嵌合部には一般にタンパー・エビデント・バンド(tamper evident band)5と呼ばれている開封履歴明示機構がついている。これは工場から出荷後消費者がキャップ2を開く前にキャップ2が空けられた場合には前記タンパー・エビデント・バンド5が切断されその事実が明示される機構である。このタンパー・エビデント・バンド5には二種類の形態があり、一方はキャップ2が許容範囲を越えて回転変位されたときに切れるタイプ、他方はキャップ2が回転にともない許容範囲を越えて口部軸方向に変位したとき切れるタイプである。キャップ2の変位が許容範囲内であった場合にはこのタンパー・エビデント・バンド5は切れないことを受け、その範囲の変位中は内容物のシールが確保される必要がある。図5Bに示すような容器口部1外周に螺旋状につけられた凸条6と図5Aに示すようなキャップ2の内周面に螺旋状につけられた凸条間の凹部7とが螺合する従来の形態の容器封止機構においては、キャップの回転変位はその螺旋勾配に対応した口部軸方向変位をともなう。したがってタンパー・エビデント・バンド5が許容する変位分については、それに基づく液漏れを防止するため図5Cに示すようなその範囲をカバーする高さをもったインナーリング8,アウターリング9をキャップ天板21に設けたり、図5Bに示すような容器口外端部にシール性のフィルム4で蓋をしたりするなどの対応策が取られてきた。また、消費者が開封後の使用期間中においてもキャップ2を閉めた状態では安定してシールが保たれることが望まれる。ということはキャップ2を閉めた際には終端位置まできちんと閉められていなくとも若干手前の位置であってもシールを確保したいということになるのであるが、そのためには容器口部1とキャップ2間に印加されたシール圧が密封を確保するだけの値を保つ必要があり、螺旋形状の勾配を小さい値にしなければならなかった。そのためキャップを外したり閉めたりする際には多くの回転変位を必要とし、手の握りを何回かに分けて回さなければならなかった。しかも勾配を小さくしても回転変位にともなう口部軸方向変位は必然的にシール圧の変化を生じその際の密封性は犠牲になっていた。また、前述のシール性のフィルム蓋4をつけたものは開栓前のタンパー・エビデント・バンドが許容するキャップの変位内では容器の密封性が保たれるのであるが、開栓した際そのシール性のフィルム蓋4を剥がさなければならないという厄介な手間が必要であった。しかも手でフィルムを剥がす際、容器口部からきれいに剥がされていればよいが、一部が外端部に残ってしまうとキャップ2を閉めても容器口外端部とキャップ間に隙間を生じてしまい、液漏れまではいかなくても水蒸気の放出が起こり不具合であった。
【0003】
【発明が解決しようとする課題】
本発明の課題は、上記の問題点を解決するもの、すなわち容器開栓前と使用中のシールの安全性を備え、キャップの開け閉めに多くの回転変位を必要としない容器封止機構の提供と、容器口外端部に貼られたシール性のフィルム蓋を開栓時に容易に開封し取り除ける前記容器封止機構の提供である。
【0004】
【課題を解決するための手段】
本発明の容器口部と該口部を封止するキャップ部材間の嵌合係止機構は、容器口部の円筒外周面に形成された案内凹溝と該凹溝内に嵌合されるキャップのスカート部内周面に設けられた独立突起の組合せからなる形態、若しくは容器口部の外周面に形成された独立突起と該独立突起を嵌合するキャップのスカート部内周面に設けられた案内凹溝の組合せからなる形態であって、前記案内凹溝は終端部近辺では容器口外端面と平行に、またそれに連続する部分では一旦底方向に向かいその後急勾配として容器口外端部方向へ設けられ、底方向に向かう案内凹溝は平行な終端部に続き負の傾斜で底方向に案内する溝部分と水平方向に案内する溝部分とを含み、該水平方向に案内する溝部分に独立突起があるときキャップ天板が容器口外端部と当接して容器を封止するようにした
また、上記構成に加え、キャップの天板にはカッターが設けられ、一旦底方向に向かう凹溝にガイドされることにより、該カッターが容器口外端部に貼られたシール性フィルム蓋をカットする形態や、キャップの天板には栓抜き棹が設けられ、一旦底方向に向かう案内凹溝にガイドされることにより、該栓抜き棹が容器口部のラムネ栓を開放する形態を提示した。
【0005】
【発明の実施の形態】
本出願人は、従来キャップを開け閉めするのに途中で握りを変えて何回かキャップを回していたものを、少ない回転変位で簡単に開け閉めしたいということから出発した。そのためには螺合関係にある容器口部とキャップに設ける螺旋の傾斜角を大きくすればよいことになる。ところが、単純にそうした場合には閉止終端部近辺での若干の回転変位でも相当分の口部軸方向変位を伴うことにより、その若干の回転変位でもタンパー・エビデント・バンドがすぐに切れてしまうという問題、閉止終端部で密封閉止状態を確保しても若干の回転変位で両者間のシール圧が大きく減少するだけでなく隙間を生じてしまうため、使用前や使用中の液漏れが予想されるといった問題が生じる。したがって、本出願人は案内凹溝終端部近辺の回転変位については軸方向の変位をなくし、それに連続する部分での回転変位が軸方向の変位を大きくすることに想到したのであるが、これは一定傾斜角の凹凸条で形成される従来の容器口部とキャップの螺合形態の容器封止機構には不可能なことである。そこで、本出願人は回転変位と軸方向変位の関係が一定では無いガイド機構として、位置に応じ傾斜角を異にする案内凹溝とその溝に嵌合するピン状の独立突起との組合せを採用することに想到し、該容器口部とキャップに関する発明を別途特許出願している。ところが、開栓前容器のシール安全性を高めるために容器口外端部にシール性のフィルム蓋を貼りつけることが従来から慣用されており、この場合には確かにシールの安全性は高いのであるが、先に述べたようにキャップの開栓に際しそのフィルムを手で剥がさなければならないという厄介な作業が必要となる。そこで本発明は先の発明を更に進め、このシール性のフィルム蓋をキャップの開栓と連動して開封する機構を加えた発明を提供するものである。
【0006】
図1Aは本発明のキャップの1例を示したもので、左半分は一部断面で示した図であり、Bは容器口部を示した図である。図1Bにあるように容器口部1の円筒状外周面には口端部より傾斜角の大きな螺旋状の案内部31と、その延長の終端部近傍では口端面と平行の案内部32と、その両案内部間に前記平行の案内部32より更に底方向にガイドする案内部33からなる案内凹溝3が設けられ、キャップ2のスカート部内周面には図1Aに示されるようにピン状の独立突起22が、また天板21にはカッター24が設けられている。該独立突起22はキャップが閉められた状態では終端部近傍で前記案内凹溝3の平行案内部32に嵌合係止されているため、使用前に前記終端部近傍で若干の回転変位を与えられても軸方向の変位を伴うことがないため、工場から出荷後消費者によって開栓されるまでの間はタンパー・エビデント・バンドに負荷を与えることがない。消費者が開栓のためキャップ2を回すとピン状の独立突起22は案内凹溝3にガイドされ、キャップは回転に伴い軸方向に変位する。すなわち独立突起22が平行案内部32を越え、底方向にガイドする案内部33にくるとキャップ2は一旦底方向に変位し、このときカッター24がシール性のフィルム蓋4に切込みを入れ、さらなる回転変位によって円周状にカットする。このときシール性のフィルム蓋4は全円周に亘りカットされ容器口外端部から完全に分離される必要があるため、カッター24が前記シール性のフィルム蓋4に切込みを入れる位置にある円周角度に対応して複数個のカッター24を配置するものとする。本発明においてはシール性のフィルム蓋4を剥がすのではなく切り取るので、容器口外端部には該フィルムがリング状に貼りついた状態で残るが、全周に亘り均一であるため隙間を生じることはなく、かえってこれが弾性材としての機構を果たし、開栓後のシール効果を奏するものとなる。次の段階で独立突起22が傾斜角の大きな螺旋状の案内部31に達するとキャップ2は少ない回転変位で容器口部1から外される。本発明の開栓時の多様な動作は従来の容器口部とキャップの螺合関係では実施不能であり、案内凹溝3と該凹溝内に嵌合される独立突起22の組合せからなる形態によって初めて可能になったのである。
【0007】
いま、容器口部1の外周面に案内凹溝3を設け、キャップ2内周面にピン状の独立突起22を設けた形態を提示したが、本発明はこれに限らず、キャップ内面側に傾斜角の大きな螺旋状の案内部と、シール性のフィルム蓋4をカットするための底方向案内部、その延長の終端部近傍では口端面と平行の案内部とからなる案内凹溝3を設け、容器口部1側の外周面にピン状の独立突起22を設ける形態であっても同様の機能を実現することが出来る。また、本発明は開栓時にキャップ2を一旦底方向にガイドするものであるので、上記のシール性のフィルム蓋4をカットする形態だけでなく、キャップ天板中央に栓抜き棹を設けて、該栓抜き棹が底方向に変位する際ラムネ球を押し下げ、ラムネ式栓を空けて開栓する形態の発泡性液体の容器のキャップとしても応用できる。
【0008】
【実施例1】
本発明の実施例を詳細に説明する。
図1Bに示されるように容器口部1の端部は外周面が若干削られ薄肉部11が形成される一方、プラスチック製のキャップ天面部21には図1Aに示されるように前記外周面が若干削られた容器口部1の薄肉部11と当接する断面凹状のシールリング23が設けられ、ピン状の独立突起22が底方向案内部33の平行な案内部にあるときには所定のシール圧で容器口端部の薄肉部11とシールリング23が圧接されるようになっていて、容器の密封を確保している。プラスチック製キャップの材料樹脂としては、各種プラスチック、例えば、低−,中−または高密度ポリエチレン、ポリプロピレン、熱可塑性ポリエステル、ポリアミド、スチレン、ABS樹脂等が挙げられる。また、本発明のプラスチック製キャップは、上記樹脂を用い、通常、射出成形、圧縮成形等により製造される。このシールリング23にはシール効果を高めるため弾性に富んだ低密度ポリエチレン、エチレン系共重合体、各種ゴム乃至熱可塑性エラストマー、アクリル樹脂プラスチゾル、塩化ビニル樹脂プラスチゾル等を用いる。なお、このシールリングはキャップ自体が弾性力を有した種々のプラスチックが使用でき、例えばポリエチレン、ポリプロピレン、プロピレン−エチレン重合体、プロピレン−ブタン1共重合体等のオレフィン系樹脂;アクリルニトリル−スチレン−ブタジエン(ABS樹脂);耐衝撃性スチレン樹脂;アクリル樹脂;ナイロン系樹脂等の樹脂から形成されたものである場合は必要でない。本実施例においては、図2に示すように独立突起22はキャップの内周面に2個配設され、これと組合わされる案内凹溝3も前記独立突起22と同じ間隔に対応した容器口部の外周面の位置に2本形成され、2つの嵌合係止が協働して天板面と容器口外端面との平行を維持したままキャップの開け閉めをガイドする構成とした。図3に示したように2組の独立突起22と凹溝3の嵌合係止は、終端部の平行案内部32が円周方向に30度(▲1▼区間)で、それに続く底方向案内部33はまず-11.3度の傾斜で底方向に案内する溝部分(▲2▼区間)が円周方向45度、水平方向に案内する溝部分(▲3▼区間)が円周方向15度、2.9度の傾斜で口外端部方向へ案内する溝部分(▲4▼区間)が円周方向30度となっており、更に続く傾斜部31(▲5▼区間)が急勾配の16.7度で円周方向60度となってその全長は円周方向180度に亘るものとなっている。このときこれと嵌合する2組の独立突起22は当然ながらキャップ2の内周面に同じ180度間隔に配設される。この実施例ではキャップを180度回転させれば容器から外すことができ、握りを変えること無くワンタッチでキャップの開け閉めが実行できる。
【0009】
また、本発明はキャップ2が最も底方向にある位置、すなわち独立突起22が底方向案内部33の水平方向に案内する溝部分(▲3▼区間)の円周方向15度にあるときにシールリング23が容器口外端部と当接してシール効果を奏するものであるから、本実施例では、底方向案内部33の-11.3度の傾斜で底方向に案内する溝部分(▲2▼区間)と前記水平方向に案内する溝部分(▲3▼区間)の境界部に図2に示すような逆止爪34を設置する。これは開栓時には独立突起22が通過できるがキャップを閉める際にはストッパーとして機能するものであり、これを越えてキャップ2が回動してしまうとシールリング23と容器口外端部との間に間隙を生じ液漏れの原因になってしまう。この逆止爪34はシール効果を確保するためのものであり、この水平案内溝部分(▲3▼区間)が円周方向に15度とられているのはストッパーである逆止爪34の位置まできちんと閉められなくてもその近辺にあればシール圧に変化が無く密封状態を安定して確保し、液漏れを生じることがないようにするためである。また、開栓前においては終端部の平行案内部32の存在によりタンパー・エビデント・バンドに負荷がかかることはない。またその際シールリング23と容器口外端部との間のシールは機能していないがこの容器はシール性のフィルム蓋4によってシールが確保されているので開栓前に液漏れする惧れはないし、前記タンパー・エビデント・バンドの存在により該シール性のフィルム蓋4を開栓前に開けることは防止される。なお、この案内凹溝3は軸方向位置が異なっていれば周方向に重なっていてもよく、また2組に限定されるものでもない。
【0010】
【実施例2】
本発明の異なる実施例を図4に示す。この実施例では容器口部1の外周面に独立突起22を180度間隔で2つ設け、これと嵌合係止される案内凹溝3をキャップ2の内周面に2条設けた。この案内凹溝3は図3に示したものとは勾配の正負が異なるが、終端部の平行案内部32が円周方向に30度、更に底方向に45度、水平に案内する溝部分が円周方向に30度そして傾斜部31が円周方向30度からなる。先の実施例と異なるのは勾配の正負と、独立突起22と案内溝部3の設置位置が容器とキャップと反対となる点である。
【0011】
【発明の効果】
本発明は、開栓に際し一旦底方向にキャップをガイドする作動を伴うものであるため、単にキャップを外すだけでなくワンタッチで容器口部におけるシールをも解除できるものである。本発明を容器口外端部にシール性のフィルム蓋を貼りつけた容器に適用すれば、これによってキャップを外した後にこのシール性のフィルム蓋を剥がすという厄介な手間が無くなった。しかも切り離されたフィルムはキャップ天板に複数個配設されたカッターにはさまれ容器内に落ちたり、口外端部に付着することがない。またラムネ栓形態の容器に適用すればキャップを開けるワンタッチ動作だけで、ラムネ栓を改めて開ける手間がないものである。
【0012】
本発明の容器封止機構部は、容器口部の外周面に形成された案内凹溝と該凹溝内に嵌合されるキャップの内周面に設けられたピン状の独立突起の組合せからなる形態であるため、上記案内凹溝の傾斜角を螺子溝のように一定に保つ必要がなく多段曲折とすることができ多様なキャップの変位動作が可能となった。すなわちその自由度を生かし前記凹溝は終端部近辺では容器口外端面と平行に設けるようにして開栓前の終端部近辺でのキャップの若干の回転変位ではタンパー・エビデント・バンドに負荷がかからないようにできた。また、傾斜案内部31部分を急勾配とすることにより少ない回転変位でキャップの開け閉めが可能となった。底方向案内部の平行案内溝の存在により容器口外端部とキャップ天板間のシールが図られ、キャップの若干の回転変位では口部軸方向の変位を生じないようことにより、シール圧の変化が無いことから液漏れを起こすことはない。
【図面の簡単な説明】
【図1】本発明の基本構成を示す図。
【図2】本発明の1実施例を示す図。
【図3】本発明の実施例の案内凹溝の位置関係を示す図。
【図4】本発明の他の実施例を示す図。
【図5】従来の容器口部とキャップの構成を示す図。
【符号の説明】
1 容器口部 33 底方向案内部
11 薄肉部 34 逆止爪
2 キャップ 4 シール性フィルム蓋
21 天板 5 タンパー・エビデント・バンド
22 独立突起 6 凸条
23 シールリング 7 凸条間の凹部
24 カッター 8 インナーリング
3 案内凹溝 9 アウターリング
31 傾斜案内部
32 平行案内部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap combined with a mouth portion of a container such as a bottle for sealing the container.
[0002]
[Prior art]
Conventionally, a container sealing mechanism between a container mouth portion and a cap member detachably fitted to the mouth portion is spirally attached to the outer periphery of a generally cylindrical container mouth portion 1 as shown in FIG. The ridge 6 and the recess 7 between the ridges spirally attached to the inner peripheral surface of the cap 2 formed of a cylindrical skirt portion suspended from the peripheral edge of the top plate 21 are screwed together. Yes. The fitting part of this type of container is provided with an opening history clarification mechanism generally called a tamper evident band 5. This is a mechanism in which if the cap 2 is opened before the consumer opens the cap 2 after shipping from the factory, the tamper evidence band 5 is cut and the fact is clearly shown. This tamper-evidence band 5 has two types, one of which is cut when the cap 2 is rotationally displaced beyond the allowable range, and the other is the mouth that exceeds the allowable range as the cap 2 rotates. This type is cut when displaced in the axial direction. When the displacement of the cap 2 is within an allowable range, the tamper-evidence band 5 is not cut off, and it is necessary to ensure the sealing of the contents during the displacement of the range. As shown in FIG. 5B, the protrusion 6 spirally attached to the outer periphery of the container mouth portion 1 and the recess 7 between the protrusions spirally attached to the inner peripheral surface of the cap 2 as shown in FIG. 5A are screwed together. In the conventional container sealing mechanism, the rotational displacement of the cap is accompanied by the axial displacement of the mouth corresponding to the helical gradient. Therefore, for the displacement allowed by the tamper-evidence band 5, the inner ring 8 and the outer ring 9 having a height that covers the range as shown in FIG. Measures have been taken, such as providing a lid 21 with a sealing film 4 on the outer end of the container mouth as shown in FIG. 5B. Further, it is desired that the seal is stably maintained in a state where the cap 2 is closed even during the use period after the opening. This means that when the cap 2 is closed, it is desired to secure a seal even if it is not completely closed to the end position, even if it is in a slightly near position. For this purpose, the container mouth 1 and the cap 2 The seal pressure applied between them had to keep a value sufficient to ensure the seal, and the spiral gradient had to be made small. Therefore, when removing and closing the cap, many rotational displacements were required, and the hand grip had to be divided into several times. Moreover, even if the gradient is reduced, the axial displacement of the mouth portion accompanying the rotational displacement inevitably causes a change in the sealing pressure, and the sealing performance at that time is sacrificed. In addition, with the above-described sealing film lid 4, the sealing performance of the container is maintained within the displacement of the cap allowed by the tamper-evidence band before opening, The troublesome labor of having to peel off the sex film cover 4 was necessary. Moreover, when the film is peeled off by hand, it is sufficient that the film is peeled off from the container mouth. However, if a part of the film remains on the outer end, a gap will be generated between the container mouth outer end and the cap even if the cap 2 is closed. In other words, even if the liquid does not leak, water vapor is released, which is a problem.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a container sealing mechanism that solves the above-described problems, that is, a container sealing mechanism that has a safety of sealing before and after opening a container and does not require a lot of rotational displacement for opening and closing the cap. And providing the container sealing mechanism capable of easily opening and removing the sealing film lid attached to the outer end of the container mouth when opening.
[0004]
[Means for Solving the Problems]
The fitting locking mechanism between the container mouth portion of the present invention and the cap member that seals the mouth portion includes a guide groove formed on the cylindrical outer peripheral surface of the container mouth portion and a cap fitted in the groove. A guide recess provided on the inner peripheral surface of the skirt portion of the cap that fits the independent protrusion formed on the outer peripheral surface of the container mouth and the independent protrusion formed on the inner peripheral surface of the skirt portion. It is a form consisting of a combination of grooves, the guide groove is provided in the container mouth outer end direction in the vicinity of the terminal end portion in parallel with the container mouth outer end surface, and once in the continuous portion toward the bottom, and then as a steep slope. The guide groove toward the bottom includes a groove portion that is guided in the bottom direction with a negative inclination following the parallel terminal portion, and a groove portion that is guided in the horizontal direction, and the groove portion that is guided in the horizontal direction has an independent protrusion. When the cap top plate touches the outer edge of the container mouth It was to seal the container Te.
In addition to the above configuration, a cutter is provided on the top plate of the cap, and the cutter cuts the sealing film lid attached to the outer end of the container mouth by being guided once by the concave groove toward the bottom. The form and the top plate of the cap were provided with a bottle opener, and once the bottle was guided by a guide groove toward the bottom, the bottle opener opened the ramune plug at the container mouth.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present applicant started from opening and closing the cap, which had been changed several times by changing the grip on the way and easily opening and closing the cap with a small rotational displacement. For this purpose, it is only necessary to increase the inclination angle of the spiral provided in the container mouth portion and the cap that are in a screwed relationship. However, in such a case, even if a slight rotational displacement near the closing end is accompanied by a considerable amount of axial displacement in the mouth, the tamper-evident band will be cut immediately even by the slight rotational displacement. Problem, even if a closed state is secured at the closing end, not only the seal pressure between the two will be greatly reduced by a slight rotational displacement, but also a gap will be created, so liquid leakage before and during use is expected Problems arise. Therefore, the present applicant has conceived that the rotational displacement in the vicinity of the guide groove end portion is eliminated in the axial direction, and the rotational displacement in the continuous portion increases the axial displacement. This is impossible with the conventional container sealing mechanism in which the container mouth portion and the cap are screwed together, which is formed by the concavo-convex ridge having a constant inclination angle. Therefore, the applicant of the present invention is a guide mechanism in which the relationship between rotational displacement and axial displacement is not constant, and a combination of a guide groove having a different inclination angle depending on the position and a pin-like independent protrusion fitted in the groove. The invention concerning the container opening and the cap has been filed separately. However, in order to improve the sealing safety of the container before opening, it has been conventionally used to attach a sealing film lid to the outer end of the container mouth. In this case, the sealing safety is certainly high. However, as described above, when the cap is opened, the troublesome work of having to peel off the film by hand is required. Therefore, the present invention further advances the previous invention and provides an invention in which a mechanism for opening the sealing film lid in conjunction with opening of the cap is added.
[0006]
FIG. 1A shows an example of a cap according to the present invention. The left half is a partial cross-sectional view, and B is a view showing a container mouth. As shown in FIG. 1B, on the cylindrical outer peripheral surface of the container mouth portion 1, a spiral guide portion 31 having a larger inclination angle than the mouth end portion, and a guide portion 32 parallel to the mouth end surface in the vicinity of the terminal end of the extension, Between the two guide portions, there is provided a guide concave groove 3 comprising a guide portion 33 for guiding further in the bottom direction than the parallel guide portion 32, and a pin-like shape is formed on the inner peripheral surface of the skirt portion of the cap 2 as shown in FIG. 1A. The independent projection 22 is provided, and the top plate 21 is provided with a cutter 24. The independent protrusion 22 is fitted and locked to the parallel guide portion 32 of the guide groove 3 in the vicinity of the end portion when the cap is closed, so that a slight rotational displacement is applied in the vicinity of the end portion before use. Since there is no axial displacement even if it is applied, no load is applied to the tamper-evident band from the factory until it is opened by the consumer after shipment. When the consumer turns the cap 2 for opening, the pin-like independent protrusion 22 is guided by the guide groove 3, and the cap is displaced in the axial direction as the cap rotates. That is, when the independent projection 22 passes over the parallel guide portion 32 and reaches the guide portion 33 that guides in the bottom direction, the cap 2 is once displaced in the bottom direction, and at this time, the cutter 24 cuts into the sealing film cover 4 and further Cut circumferentially by rotational displacement. At this time, since the sealing film lid 4 needs to be cut over the entire circumference and completely separated from the outer end of the container mouth, the circumference at which the cutter 24 is positioned to cut the sealing film lid 4. A plurality of cutters 24 are arranged corresponding to the angle. In the present invention, the sealing film cover 4 is cut off instead of being peeled off, so that the film remains in a ring-like state at the outer end of the container mouth, but a gap is generated because it is uniform over the entire circumference. On the contrary, this serves as a mechanism as an elastic material and provides a sealing effect after opening. When the independent protrusion 22 reaches the spiral guide portion 31 having a large inclination angle in the next stage, the cap 2 is removed from the container mouth portion 1 with a small rotational displacement. Various operations at the time of opening of the present invention cannot be performed by the conventional screwed relationship between the container mouth portion and the cap, and are composed of a combination of the guide groove 3 and the independent protrusion 22 fitted in the groove. It became possible for the first time.
[0007]
Now, although the form which provided the guide ditch | groove 3 in the outer peripheral surface of the container mouth part 1 and provided the pin-shaped independent protrusion 22 in the inner peripheral surface of the cap 2 was shown, this invention is not restricted to this, The cap inner surface side is shown. A guide groove 3 comprising a spiral guide portion having a large inclination angle, a bottom direction guide portion for cutting the sealing film cover 4, and a guide portion parallel to the mouth end face is provided in the vicinity of the terminal end of the extension. The same function can be realized even if the pin-like independent protrusion 22 is provided on the outer peripheral surface on the container mouth 1 side. In addition, since the present invention guides the cap 2 once in the bottom direction at the time of opening, not only the form of cutting the above-mentioned sealing film lid 4, but also providing a bottle opener in the center of the cap top plate, When the bottle opener is displaced in the bottom direction, it can be applied as a cap of a foamable liquid container in which the ramune sphere is pushed down to open the ramune stopper.
[0008]
[Example 1]
Examples of the present invention will be described in detail.
As shown in FIG. 1B, the outer peripheral surface of the end portion of the container mouth portion 1 is slightly cut to form a thin-walled portion 11, while the plastic cap top surface portion 21 has the outer peripheral surface as shown in FIG. 1A. A seal ring 23 having a concave cross section that comes into contact with the thin portion 11 of the container mouth portion 1 that is slightly shaved is provided, and when the pin-like independent protrusion 22 is in the parallel guide portion of the bottom guide portion 33, a predetermined seal pressure is applied. The thin-walled portion 11 at the end of the container mouth and the seal ring 23 are pressed against each other to ensure the sealing of the container. Examples of the material resin for the plastic cap include various plastics such as low-, medium- or high-density polyethylene, polypropylene, thermoplastic polyester, polyamide, styrene, and ABS resin. The plastic cap of the present invention is usually produced by injection molding, compression molding or the like using the above resin. The seal ring 23 is made of low-density polyethylene, ethylene copolymer, various rubbers or thermoplastic elastomers, acrylic resin plastisol, vinyl chloride resin plastisol, etc., which are rich in elasticity, in order to enhance the sealing effect. The seal ring can be made of various plastics whose caps themselves have elasticity. For example, olefinic resins such as polyethylene, polypropylene, propylene-ethylene polymer, propylene-butane 1 copolymer; acrylonitrile-styrene- It is not necessary when it is formed from a resin such as butadiene (ABS resin); impact-resistant styrene resin; acrylic resin; nylon resin. In this embodiment, as shown in FIG. 2, two independent protrusions 22 are arranged on the inner peripheral surface of the cap, and the guide groove 3 combined therewith also corresponds to the same interval as the independent protrusion 22. Two caps are formed at the position of the outer peripheral surface of the part, and the two fitting locks cooperate to guide opening and closing of the cap while maintaining the parallelism between the top plate surface and the outer end surface of the container mouth. As shown in FIG. 3, the engagement of the two independent protrusions 22 and the groove 3 is such that the parallel guide portion 32 at the end portion is 30 degrees in the circumferential direction (1 section), and the bottom direction that follows it. The guide part 33 is first inclined at -11. 3 degrees, the groove part (▲ 2) section guiding in the bottom direction is 45 degrees in the circumferential direction, and the groove part guiding horizontally (section (3)) is 15 degrees in the circumferential direction. The groove part (4 section) guiding toward the outer edge of the mouth with an inclination of 2.9 degrees is 30 degrees in the circumferential direction, and the further inclined part 31 (5 section) is 16.7 degrees with a steep slope. The circumferential direction is 60 degrees, and the entire length is 180 degrees in the circumferential direction. At this time, the two sets of independent protrusions 22 fitted to this are naturally disposed on the inner peripheral surface of the cap 2 at the same 180 degree interval. In this embodiment, the cap can be removed from the container by rotating 180 degrees, and the cap can be opened and closed with one touch without changing the grip.
[0009]
Further, the present invention seals when the cap 2 is at the bottommost position, that is, when the independent protrusion 22 is at 15 degrees in the circumferential direction of the groove portion (3 section) that guides the bottom guide portion 33 in the horizontal direction. Since the ring 23 comes into contact with the outer end portion of the container mouth and has a sealing effect, in this embodiment, the groove portion ((2) section) that guides the bottom direction guide portion 33 in the bottom direction with an inclination of −11.3 degrees. A check claw 34 as shown in FIG. 2 is installed at the boundary of the groove portion (3 section) guided in the horizontal direction. This allows the independent protrusion 22 to pass when the cap is opened, but functions as a stopper when the cap is closed. If the cap 2 rotates beyond this, the gap between the seal ring 23 and the outer end of the container mouth This causes a gap in the liquid and causes liquid leakage. The check pawl 34 is for ensuring a sealing effect. The horizontal guide groove portion (3) is set at 15 degrees in the circumferential direction. The position of the check pawl 34 is a stopper. Even if it is not properly closed, there is no change in the sealing pressure as long as it is in the vicinity, so that the sealed state is stably secured and liquid leakage does not occur. Further, before opening, no load is applied to the tamper-evident band due to the presence of the parallel guide portion 32 at the end portion. In this case, the seal between the seal ring 23 and the outer end of the container mouth is not functioning. However, since the seal is secured by the sealable film lid 4, there is no possibility of liquid leakage before opening. The presence of the tamper-evidence band prevents the sealing film lid 4 from being opened before opening. The guide grooves 3 may overlap in the circumferential direction as long as the axial positions are different, and are not limited to two sets.
[0010]
[Example 2]
A different embodiment of the invention is shown in FIG. In this embodiment, two independent protrusions 22 are provided on the outer peripheral surface of the container mouth 1 at intervals of 180 degrees, and two guide grooves 3 fitted and locked therewith are provided on the inner peripheral surface of the cap 2. The guide groove 3 has a slope that is different from that shown in FIG. 3, but the parallel guide portion 32 at the end portion has a groove portion that guides horizontally by 30 degrees in the circumferential direction and 45 degrees in the bottom direction. The inclined portion 31 is 30 degrees in the circumferential direction and 30 degrees in the circumferential direction. The difference from the previous embodiment is that the slope is positive and negative, and the position of the independent protrusion 22 and the guide groove 3 is opposite to the container and the cap.
[0011]
【The invention's effect】
Since the present invention involves the operation of guiding the cap once in the bottom direction when opening the cap, it is possible not only to remove the cap but also to release the seal at the container mouth by one touch. When the present invention is applied to a container having a sealing film lid attached to the outer end of the container mouth, the troublesome trouble of removing the sealing film lid after removing the cap is eliminated. Moreover, the separated film is sandwiched by a plurality of cutters disposed on the cap top plate and does not fall into the container or adhere to the outer end of the mouth. Moreover, if it is applied to a container having a ramune plug shape, only one-touch operation for opening the cap is required, and there is no need to open the ramune plug again.
[0012]
The container sealing mechanism part of the present invention comprises a combination of a guide groove formed on the outer peripheral surface of the container mouth and a pin-like independent protrusion provided on the inner peripheral surface of the cap fitted in the groove. Therefore, it is not necessary to keep the inclination angle of the guide concave groove constant as in the case of the screw groove, and it is possible to make a multi-stage bending and to perform various cap displacement operations. In other words, taking advantage of the degree of freedom, the concave groove is provided in parallel with the outer end surface of the container mouth in the vicinity of the terminal end, so that a slight rotational displacement of the cap near the terminal end before opening does not apply a load to the tamper-evidence band. I was able to. Further, by making the inclined guide portion 31 a steep slope, the cap can be opened and closed with a small rotational displacement. Sealing between the outer end of the container mouth and the cap top plate is achieved by the presence of the parallel guide groove in the bottom guide, and the seal pressure changes by preventing slight displacement of the cap in the axial direction of the mouth. There is no leakage from the liquid.
[Brief description of the drawings]
FIG. 1 is a diagram showing a basic configuration of the present invention.
FIG. 2 is a diagram showing one embodiment of the present invention.
FIG. 3 is a view showing a positional relationship of guide grooves according to an embodiment of the present invention.
FIG. 4 is a diagram showing another embodiment of the present invention.
FIG. 5 is a diagram showing a configuration of a conventional container mouth and cap.
[Explanation of symbols]
1 Container mouth 33 Bottom direction guide
11 Thin-walled part 34 Check nail 2 Cap 4 Sealing film lid
21 Top plate 5 Tamper evident band
22 Independent protrusion 6 Projection
23 Seal ring 7 Recesses between ridges
24 Cutter 8 Inner ring 3 Guide groove 9 Outer ring
31 Inclination guide
32 Parallel guide

Claims (4)

容器口部と該口部を封止するキャップ部材間の嵌合係止機構は、容器口部の円筒外周面に形成された案内凹溝と該凹溝内に嵌合されるキャップのスカート部内周面に設けられた独立突起の組合せからなる形態であって、前記案内凹溝は終端部近辺では容器口外端面と平行に、またそれに連続する部分では一旦底方向に向かいその後急勾配として容器口外端部方向へ設けられ、底方向に向かう案内凹溝は平行な終端部に続き負の傾斜で底方向に案内する溝部分と水平方向に案内する溝部分とを含み、該水平方向に案内する溝部分に独立突起があるときキャップ天板が容器口外端部と当接して容器を封止するようにした容器口部及びキャップ。The fitting locking mechanism between the container mouth portion and the cap member that seals the mouth portion includes a guide groove formed on the cylindrical outer peripheral surface of the container mouth portion and a skirt portion of the cap fitted into the groove. The guide groove is formed in the form of a combination of independent protrusions provided on the circumferential surface, and the guide groove is parallel to the outer end surface of the container mouth in the vicinity of the terminal portion, and once toward the bottom in the continuous portion, and then as a steep slope, the guide groove is outside the container mouth. The guide groove provided in the end direction and directed in the bottom direction includes a groove portion that is guided in the bottom direction and a groove portion that is guided in the horizontal direction with a negative inclination following the parallel terminal portion, and is guided in the horizontal direction. A container mouth and a cap in which the cap top plate comes into contact with the outer end of the container mouth to seal the container when there is an independent protrusion in the groove portion . キャップの天板にはカッターが設けられ、一旦底方向に向かう凹溝にガイドされることにより、該カッターが容器口外端部に貼られたシール性フィルム蓋をカットすることを特徴とする請求項1に記載の容器口部及びキャップ。  The top plate of the cap is provided with a cutter, and the cutter cuts the sealing film lid attached to the outer end portion of the container mouth by being guided by a concave groove toward the bottom. The container mouth part and cap of 1. 容器口部と該口部を封止するキャップ部材間の嵌合係止機構は、容器口部の円筒外周面に形成された案内凹溝と該凹溝内に嵌合されるキャップのスカート部内周面に設けられた独立突起の組合せからなる形態であって、前記案内凹溝は終端部近辺では容器口外端面と平行に、またそれに連続する部分では一旦底方向に向かいその後急勾配として容器口外端部方向へ設けられ、キャップの天板には栓抜き棹が設けられ、一旦底方向に向かう案内凹溝にガイドされることにより、該栓抜き棹が容器口部のラムネ栓を開放することを特徴とする容器口部及びキャップ。 The fitting locking mechanism between the container mouth portion and the cap member that seals the mouth portion includes a guide groove formed on the cylindrical outer peripheral surface of the container mouth portion and a skirt portion of the cap fitted into the groove. The guide groove is formed in the form of a combination of independent protrusions provided on the circumferential surface, and the guide groove is parallel to the outer end surface of the container mouth in the vicinity of the terminal portion, and once toward the bottom in the continuous portion, and then as a steep slope, the guide groove is outside the container mouth. A cap opener is provided on the top plate of the cap, and the cap opener opens the ramune plug at the container mouth by being guided by the guide groove once toward the bottom. A container mouth and a cap. 容器口部と該口部を封止するキャップ部材間の嵌合係止機構は、容器口部の外周面に形成された独立突起と該独立突起を嵌合するキャップのスカート部内周面に設けられた案内凹溝の組合せからなる形態であって、前記凹溝は終端部近辺ではキャップ天板面と平行に、またそれに連続する部分では一旦底方向に向かいその後急勾配として容器口外端部方向へ設けられ、底方向に向かう案内凹溝は平行な終端部に続き負の傾斜で底方向に案内する溝部分と水平方向に案内する溝部分とを含み、該水平方向に案内する溝部分に独立突起があるときキャップ天板が容器口外端部と当接して容器を封止するようにした容器口部及びキャップ。A fitting locking mechanism between the container mouth and the cap member that seals the mouth is provided on the inner peripheral surface of the cap and the independent protrusion formed on the outer peripheral surface of the container mouth. The groove is parallel to the top surface of the cap in the vicinity of the terminal end portion, and once in the direction continuing to the bottom direction, and then steeply sloped toward the outer end portion of the container mouth. The guide groove extending in the bottom direction includes a groove portion that guides in the bottom direction with a negative slope and a groove portion that guides in the horizontal direction, and a groove portion that guides in the horizontal direction. A container mouth portion and a cap in which the cap top plate comes into contact with the outer end of the container mouth to seal the container when there is an independent protrusion .
JP36933199A 1999-12-27 1999-12-27 Container mouth and screw cap Expired - Fee Related JP4502088B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155985A (en) * 1984-02-16 1985-10-02 Malcolm Gordon Victory Bayonet fastening
JPH05201446A (en) * 1991-09-04 1993-08-10 Tetra Alfa Holdings Sa Mouth opening device for container package
US5947318A (en) * 1997-02-24 1999-09-07 Tetra Laval Holdings & Finance S.A. Opening device for packages of pourable food products

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5566845A (en) * 1995-02-01 1996-10-22 Idea Laboratories, Inc. Container having a seal puncturing device
JP2000326999A (en) * 1999-05-19 2000-11-28 Horie Kikaku:Kk Cylindrical container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155985A (en) * 1984-02-16 1985-10-02 Malcolm Gordon Victory Bayonet fastening
JPH05201446A (en) * 1991-09-04 1993-08-10 Tetra Alfa Holdings Sa Mouth opening device for container package
US5947318A (en) * 1997-02-24 1999-09-07 Tetra Laval Holdings & Finance S.A. Opening device for packages of pourable food products

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