JP5085373B2 - Cap for container - Google Patents

Cap for container Download PDF

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JP5085373B2
JP5085373B2 JP2008048449A JP2008048449A JP5085373B2 JP 5085373 B2 JP5085373 B2 JP 5085373B2 JP 2008048449 A JP2008048449 A JP 2008048449A JP 2008048449 A JP2008048449 A JP 2008048449A JP 5085373 B2 JP5085373 B2 JP 5085373B2
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container
wall
cap
mouth
contact
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JP2009202916A (en
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勇 天沼
和仁 桑原
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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Description

本発明は、容器用キャップに関するものであり、容器の口部突端での弾性的な接触によるシールを確実に行うとするものである。   The present invention relates to a container cap, and is intended to reliably perform sealing by elastic contact at the mouth end of the container.

ペットボトル等の飲料容器や醤油等の調味料、酒類等を入れる容器の口部に装着されるキャップは、ねじ止めタイプやアンダーカットタイプ等があるが何れも容器の確実な密封を実現する観点からキャップの裏面と容器の口部突端との相互間に押し代をもったパッキンの如きシール部材が配置されており、これによって容器が密封されている。   Caps attached to the mouths of beverage containers such as plastic bottles, seasonings such as soy sauce, and containers for alcoholic beverages are screw-on types and undercut types. A sealing member such as a packing having a pushing allowance is arranged between the back surface of the cap and the protruding end of the mouth of the container, thereby sealing the container.

ところで、上記のような従来のシール部材は、キャップの内側に一体又は別体に配置されているのが普通であるところ、その配置に際しては位置ずれが生じることがあり、また、キャップの頻繁な取り付け、取り外しが行われる状況ではシール部材の押し代が次第に減少していきシール性が低下することが懸念されていた。   By the way, the conventional sealing member as described above is usually disposed integrally or separately inside the cap. However, there is a possibility that a positional shift may occur in the arrangement, and the frequent sealing of the cap is required. In the situation where attachment and removal are performed, there has been a concern that the pushing allowance of the sealing member gradually decreases and the sealing performance deteriorates.

かかる不具合を解消したキャップとしては、キャップの内面にコンタクトリングを設け、このコンタクトリングを容器の注出口天面に形成されたリング溝に適合させて容器の密封性を高めたものが知られている(例えば特許文献1参照)。
特開2007-30895号公報
As a cap that has solved such a problem, a contact ring is provided on the inner surface of the cap, and this contact ring is adapted to a ring groove formed on the top surface of the outlet of the container to improve the sealing performance of the container. (For example, see Patent Document 1).
Japanese Unexamined Patent Publication No. 2007-30895

しかしながら、この種のキャップは、容器の口部突端の表面が粗れていたり波を打つような微小変形を起こしている場合(例えば耐熱性を付与するために容器の口部に熱処理(白化処理)を施した場合やアルミシートを熱溶着により貼付する場合あるいはブロー成形に際して容器の口部を仕上げるとき等に起こり得る)には、シール部材との間に隙間が生じて容器の密封性が低下するのが避けられない状況にあった。   However, this type of cap has a case where the surface of the tip of the mouth of the container is rough or has undergone minute deformation such as a wave (for example, heat treatment (whitening treatment is applied to the mouth of the container to impart heat resistance). ), Or when an aluminum sheet is applied by heat welding or when the mouth of the container is finished during blow molding), a gap is formed between the sealing member and the sealing performance of the container is reduced. It was inevitable to do.

本発明の課題は、容器の口部突端の表面性状にかかわりなく確実にシールして容器を高い密封状態に保持できる新規な容器用キャップを提案するところにある。   An object of the present invention is to propose a novel container cap capable of reliably sealing and maintaining a highly sealed state regardless of the surface properties of the mouth end of the container.

本発明は、容器の口部突端上に位置する天面壁と、この天面壁の縁部に一体的につながり容器の口部側壁を全周にわたって取り囲む周壁とからなり、該周壁の内面を口部側壁に連係させて容器を密封保持する容器用キャップであって、
前記天面壁に、容器の口部突端に弾性接触してその相互間を液密状態に保持する環状シール体を設け、
該環状シール体は、天面壁の裏面に直接形成されるメインコンタクトと、このメインコンタクトに設けられ、該メインコンタクトとともに容器の口部突端に弾性接触するサブコンタクトからなり、
前記メインコンタクトは、外側周壁と内側周壁とを有する逆三角形状をなし、天面壁の裏面に対する外側周壁の壁角度を内側周壁の壁角度よりも大きいものであることを特徴とする容器用キャップである。
The present invention comprises a top wall located on the mouth tip of the container and a peripheral wall integrally connected to the edge of the top wall and surrounding the mouth side wall of the container over the entire circumference. A container cap for sealingly holding the container linked to the side wall,
Provided on the top wall is an annular seal body that elastically contacts the mouth tip of the container and holds the container in a liquid-tight state therebetween,
Annular seal body includes a main contact formed directly on the back surface of the top panel wall, provided in the main contact, Ri Do from the sub contact elastically contacts the mouth tip of the container together with the main contact,
The main contacts, the outer peripheral wall and an inverted triangular shape having an inner peripheral wall, the container cap, characterized in der Rukoto ones wall angle of the outer circumferential wall larger than the wall angle of the inner circumferential wall against the rear surface of the top panel wall It is.

上記の構成になる容器用キャップにおいてサブコンタクトについては、キャップの内側へ向かう傾きを有する薄肉帯にて構成することができる。 In the container cap having the above-described configuration, the sub-contact can be configured by a thin strip having an inclination toward the inside of the cap.

メインコンタクトの最先端(キャップを装着した時に最初に容器の口部突端に接触する最下部に対応する個所)にサブコンタクトを設け、このサブコンタクトを容器の口部突端の表面に沿わせるように柔軟に変形させることにより、該口部突端と環状シール体との間に隙間が形成されることがなくなり単一の部材でもって容器を高い密封状態に保持できる。   Provide a sub-contact at the tip of the main contact (corresponding to the bottom of the container that first contacts the tip of the mouth of the container when the cap is attached), and place this sub-contact along the surface of the mouth of the mouth of the container By flexibly deforming, no gap is formed between the protruding end of the mouth and the annular seal body, and the container can be held in a highly sealed state with a single member.

メインコンタクトを逆三角形状とし、天面壁の裏面に対する外側周壁の壁角度を内側周壁の壁角度よりも大きくすると、該メインコンタクトが容器の口部の内側へ向けて変位(メインコンタクトが内側へ倒れ込むような変形を起こす)することとなり、この倒れ込み状態が容器の内圧上昇に伴うシール部材の変形(口部の外側へ向かう変形)を阻止する抵抗になるためシール性が改善される。   If the main contact has an inverted triangular shape and the wall angle of the outer peripheral wall with respect to the back surface of the top wall is larger than the wall angle of the inner peripheral wall, the main contact is displaced toward the inside of the mouth of the container (the main contact falls inward). Since the collapsed state becomes a resistance to prevent deformation of the seal member (deformation toward the outside of the mouth portion) accompanying the increase in the internal pressure of the container, the sealing performance is improved.

サブコンタクトに柔軟性をもたせるべく薄肉帯にて成形し、キャップの内側へ向かう傾きをもつ配置(外観が漏斗のような先細り形状となる)とすることによりメインコンタクトとともに口部の内側への倒れ込むことになり、シール性がより一層改善される。   The sub-contact is molded with a thin strip to give flexibility, and the cap contacts the inside of the mouth by tilting toward the inside of the cap (appearance is tapered like a funnel). As a result, the sealing performance is further improved.

以下、図面を用いて本発明をより具体的に説明する。
図1は本発明にしたがう容器用キャップの実施の形態を示した図であり、図2(a)〜(c)はキャップの装着時における環状シール体の変形状況を示した図である。
Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a view showing an embodiment of a container cap according to the present invention, and FIGS. 2 (a) to 2 (c) are views showing a deformation state of an annular seal body when the cap is attached.

図における1は容器、2は容器1の口部1aにねじ止めされるキャップである(アンダーカットによる係合にて装着するものであってもよい)。    In the figure, 1 is a container, and 2 is a cap screwed to the mouth 1a of the container 1 (may be attached by engagement by undercut).

キャップ2は容器1の口部突端1a上に位置する天面壁2aと、この天面壁2aの縁部に一体的につながり容器1の口部1aを全周にわたって取り囲む周壁2bからなる。 Cap 2 is a top panel wall 2a located on the mouth portion projecting end 1a 1 of the container 1 consists of a peripheral wall 2b which surrounds the entire periphery of the mouth portion 1a of the integrally lead container 1 at the edge of the top wall 2a.

3は天面壁2aの裏面に一体的に設けられキャップ2の締め込み(装着)に際して容器1の口部突端1aに接触してその相互間を液密状態に保持する環状シール体である。この環状シール体3は天面壁2aや周壁2bと同一の樹脂で一体に成形されているが、ゴムやエラストマーの如き軟質弾性部材をインサート成形することにより構成してもよい。 3 is an annular seal which retains between their mutual liquid-tight state by contact with the mouth tip 1a 1 of the container 1 when the back surface integrally provided cap 2 of tightening of the top panel wall 2a (attached). The annular seal body 3 is integrally formed of the same resin as the top wall 2a and the peripheral wall 2b, but may be configured by insert molding a soft elastic member such as rubber or elastomer.

環状シール体3は天面壁2aに直接形成されるメインコンタクト3aと、このメインコンタクト3aの最先端(最下端部)に設けられたサブコンタクト3bにて構成されている。メインコンタクト3aは外側周壁3aと内側周壁3aとを有しその接続部を最先端とする逆三角形状をなしており、天面壁2aの裏面に対する外側周壁3aの壁角度θが内側周壁3aの壁角度θよりも大きくなっている。また、サブコンタクト3bは柔軟性を確保するため薄肉帯にて構成されキャップ2の内側へ向かう傾きを有している。なお、サブコンタクト3bは図示の例ではメインコンタクト3aの最先端に設けるのが最もよいが、メインコンタクト3aの断面形状の変更に応じてサブコンタクト3bの設置位置を適宜変更してもよい(最先端には限られない)。 The annular seal body 3 is composed of a main contact 3a formed directly on the top wall 2a and a sub-contact 3b provided at the forefront (lowermost end) of the main contact 3a. The main contacts 3a has an inverted triangular shape to the connecting portion and an outer peripheral wall 3a 1 and the inner peripheral wall 3a 2 and advanced, wall angle theta 1 of the outer peripheral wall 3a 1 against the rear surface of the top panel wall 2a inner It is larger than the wall angle theta 2 of the peripheral wall 3a 2. Further, the sub-contact 3b is formed of a thin strip to ensure flexibility, and has an inclination toward the inside of the cap 2. The sub contact 3b is best provided at the forefront of the main contact 3a in the illustrated example, but the installation position of the sub contact 3b may be appropriately changed according to the change in the cross-sectional shape of the main contact 3a. Not limited to the tip).

上記の構成になるキャップは、メインコンタクト3aの弾性接触によるシールと、サブコンタクト3bの弾性接触によるシールの、二重シール構造であり、しかもサブコンタクト3bは図2(a)〜(c)に変形状況を示す如く、口部突端1aの表面に沿って全ての領域で接触することになるので、その表面に凹凸等(品質に影響を与えることのない程度の凹凸等)があっても内容物の漏れを起こすような隙間が生じることはない。 The cap configured as described above has a double seal structure of a seal by elastic contact of the main contact 3a and a seal by elastic contact of the sub-contact 3b, and the sub-contact 3b is shown in FIGS. 2 (a) to (c). As shown in the deformation state, the contact is made in all areas along the surface of the mouth tip 1a 1 , so that even if there is unevenness on the surface (unevenness that does not affect the quality, etc.) There are no gaps that can cause the contents to leak.

環状シール体3は単一のメインコンタクト3a及びサブコンタクト3bを設けた場合を例として示したが、これらは適宜複数個設けることもできる。   Although the annular seal body 3 is shown as an example in which a single main contact 3a and sub-contacts 3b are provided, a plurality of these may be provided as appropriate.

容器の口部突端の表面性状にかかわりなく確実にシール可能な容器用キャップが提供できる。   It is possible to provide a container cap that can be surely sealed regardless of the surface property of the mouth end of the container.

本発明にしたがう容器用キャップの実施の形態を示した図である。It is the figure which showed embodiment of the cap for containers according to this invention. (a)〜(c)は図1に示した容器用キャップの環状シール体の変形状況を示した図である。(a)-(c) is the figure which showed the deformation | transformation condition of the annular seal body of the container cap shown in FIG.

符号の説明Explanation of symbols

1 容器
1a 口部
1a口部突端
2 キャップ
2a 天面壁
2b 周壁
3 環状シール体
3a メインコンタクト
3b サブコンタクト
1 container
1a mouth
1a One mouth tip
2 cap
2a Top wall
2b wall
3 Annular seal body
3a Main contact
3b Sub contact

Claims (2)

容器の口部突端上に位置する天面壁と、この天面壁の縁部に一体的につながり容器の口部側壁を全周にわたって取り囲む周壁とからなり、該周壁の内面を口部側壁に連係させて容器を密封保持する容器用キャップであって、
前記天面壁に、容器の口部突端に弾性接触してその相互間を液密状態に保持する環状シール体を設け、
該環状シール体は、天面壁の裏面に直接形成されるメインコンタクトと、このメインコンタクトに設けられ、該メインコンタクトとともに容器の口部突端に弾性接触するサブコンタクトからなり、
前記メインコンタクトは、外側周壁と内側周壁とを有する逆三角形状をなし、天面壁の裏面に対する外側周壁の壁角度が内側周壁の壁角度よりも大きいものであることを特徴とする容器用キャップ。
It consists of a top wall located on the mouth tip of the container and a peripheral wall integrally connected to the edge of the top wall and surrounding the mouth side wall of the container over the entire circumference, and the inner surface of the peripheral wall is linked to the mouth side wall. A container cap for hermetically holding the container,
Provided on the top wall is an annular seal body that elastically contacts the mouth tip of the container and holds the container in a liquid-tight state therebetween,
Annular seal body includes a main contact formed directly on the back surface of the top panel wall, provided in the main contact, Ri Do from the sub contact elastically contacts the mouth tip of the container together with the main contact,
The main contacts, the outer peripheral wall and an inverted triangular shape having an inner peripheral wall, the container cap, characterized in der Rukoto things wall angle of the outer circumferential wall larger than the wall angle of the inner circumferential wall against the rear surface of the top panel wall .
前記サブコンタクトは、キャップの内側へ向かう傾きを有する薄肉帯からなる、請求項記載の容器用キャップ。 The sub-contact is formed of a thin strip having an inclination towards the inside of the cap, according to claim 1 container cap according.
JP2008048449A 2008-02-28 2008-02-28 Cap for container Active JP5085373B2 (en)

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JP5085373B2 true JP5085373B2 (en) 2012-11-28

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5522691B2 (en) * 2011-01-31 2014-06-18 株式会社吉野工業所 Pouring lid
JP6177600B2 (en) * 2013-06-25 2017-08-09 三甲株式会社 Sealed container

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151757A (en) * 1961-05-26 1964-10-06 Smith & Stone Ltd Container closure
JPS50129561U (en) * 1974-04-05 1975-10-24
US4122965A (en) * 1977-07-07 1978-10-31 Kerr Glass Manufacturing Corporation Linerless closure
US4294370A (en) * 1980-03-24 1981-10-13 Toeppen Thurston H Threaded closure and container
US4793506A (en) * 1987-06-10 1988-12-27 Tri-Tech Systems International Inc. Closure cap with a seal and method of and apparatus for forming such closure and seal

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