JP3959430B2 - Can mouth sealing cap and sealing device - Google Patents

Can mouth sealing cap and sealing device Download PDF

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Publication number
JP3959430B2
JP3959430B2 JP2003005592A JP2003005592A JP3959430B2 JP 3959430 B2 JP3959430 B2 JP 3959430B2 JP 2003005592 A JP2003005592 A JP 2003005592A JP 2003005592 A JP2003005592 A JP 2003005592A JP 3959430 B2 JP3959430 B2 JP 3959430B2
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Prior art keywords
annular ridge
cap
vertical wall
mouth
sealing
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JP2004217241A (en
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清路 川俣
善太郎 神宮
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日本製罐株式会社
株式会社神宮製作所
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Description

【０００１】
【発明の属する技術分野】
この発明は、缶口キャップと缶口部とを、弾力的面接触によって密封することを目的とした缶口密封キャップ及び密封装置に関する。
【０００２】
【従来の技術】
従来缶口の密封装置としては、缶口キャップと、缶口部との間に弾性パッキングを介在するもの、又は缶口キャップの内側下端に設けた突条を、缶口部平面へ圧接（例えばねじ込みにより加圧）するものなどが知られていた。
【０００３】
また、図４のように、合成樹脂キャップ１の内側に環状突条４を設け、該環状突条の下端を、缶口２の水平段部２ａ上へ当接した密封装置が知られていた。
【０００４】
この場合に、環状突条４の外壁は水平段部２ａの縦壁２ｂと若干の隙間Ｓを有していた。
【０００５】
【特許文献１】
特開２０００−２８１１１６
【０００６】
【発明により解決しようとする課題】
前記従来の密封装置は、缶口キャップと、缶口部との当接面は、水平面であるから、その密封度は缶口キャップの締め付け度合いによって定まり、しかもねじキャップの場合には、ねじの特性による当接圧の不均等は免れ得ない問題点があった。
【０００７】
従って、締め付け力が小さいと、密封度が小さい場合があり、締め付け力が大きいと、密封度が大きいけれども、締め付けによってパッキングなどが弾性変形以上に変形することになり、パッキングが弾力性を失い、却って密封度が小さくなる問題点があった。
【０００８】
そこで、前記環状突条の弾力性を失わないように、弾性限内で締め付けると目的を達成できるが、弾性限内で密封を完全にする度合いが不明確になっている問題点があった。
【０００９】
【課題を解決するための手段】
この発明は、缶口密封キャップの内側に環状突条を設け、この環状突条の下端外側部を、缶口の段部縦壁に弾力的に面当接することにより、前記従来の問題点を解決したのである。
【００１０】
即ち、キャップの発明は、外周縁から缶の内側に向かって延びた後、縦方向下側に向かって延びる縦壁２ｂと、当該縦壁２ｂの下端から缶の内側に向かって延びる段部２ａとを備えていると共に、前記縦壁２ｂはその下端が缶の内側に向かって傾斜するように、５〜１０度の範囲で傾斜しており、前記段部２ａは、缶の上方向に向かって傾斜するように、水平面に対して１５〜２０度の範囲で傾斜している缶口部を有する缶を密封する缶口密封キャップであって、合成樹脂キャップの内側に形成されていて、下部が缶口部と当接する環状突条４であって、当該環状突条４の下端の内側部に、当該環状突条４の先端である当該環状突条４の下端に向かうにしたがって先細になる環状の斜切部４ａを有する環状突条４を備え、前記缶を密封する際に、前記合成樹脂キャップの環状突条４の下端側が、前記縦壁２ｂに案内されて缶の内側に向かって弾性変形し、環状突条４の下端側の外側部が、前記縦壁２ｂに弾力的に当接することを特徴とする缶口密封キャップである。また、ここで、合成樹脂キャップは、ねじキャップであって、中央部に刷毛の取付筒を有するものである。
【００１１】
また、装置の発明は、外周縁から缶の内側に向かって延びた後、縦方向下側に向かって延びる縦壁２ｂと、当該縦壁２ｂの下端から缶の内側に向かって延びる段部２ａとを備えていると共に、前記縦壁２ｂはその下端が缶の内側に向かって傾斜するように、５〜１０度の範囲で傾斜しており、前記段部２ａは、缶の上方向に向かって傾斜するように、水平面に対して１５〜２０度の範囲で傾斜している缶口部を有する缶と、当該缶を密封する缶口密封キャップであって、合成樹脂キャップの内側に形成されていて、下部が缶口部と当接する環状突条４であって、当該環状突条４の下端の内側部に、当該環状突条４の先端である当該環状突条４の下端に向かうにしたがって先細になる環状の斜切部４ａを有する環状突条４を備え、前記缶を密封する際に、前記合成樹脂キャップの環状突条４の下端側が、前記縦壁２ｂに案内されて缶の内側に向かって弾性変形し、環状突条４の下端側の外側部が、前記縦壁２ｂに弾力的に当接する缶口密封キャップとからなることを特徴とする缶口密封装置である。ここで、合成樹脂キャップは、ねじキャップであって、中央部に刷毛の取付筒を有するものである。
【００１２】
前記において、環状突条の下端部を弾性変形させて缶口部の段部へ弾力的に当接させるには、環状突条の下端を、缶口段部の外側下方への傾斜面へ当接させて、キャップの締め付けに当たり、環状突条の下端が外側へずれて、缶口部の段部縦壁へ弾力的に当接する場合と、缶口部の段部縦壁を若干傾斜させることによって、環状突条の下端を内側へ弾性変形させ、その弾力により密封させる方法とがあり、何れも採用することができる。このような場合には、缶内圧が上昇しても、当接部を押さえ、却って密封性を良好にする。
【００１３】
この発明でキャップに使用する合成樹脂は、例えば、ポリエチレン、ポリプロピレン、ナイロンなどであり、適当な弾力を有する従来キャップに使用している各種合成樹脂を使用することができる。
【００１４】
【発明の実施の形態】
この発明は、合成樹脂キャップの内側に下部が缶口部と当接できる環状突条を設け、該環状突条の下端外側部と、缶口部の段部縦壁とを弾力的に当接させるものである。
【００１５】
前記弾力は、前記環状突条の下端を、キャップの締め付けに伴って生じる弾性変形により得ることができる。
【００１６】
前記弾性変形は、締め付け力に左右されないことが好ましく、締め付け力が大きくなって、弾性を消失しないようにする必要がある。
【００１７】
前記当接部は、面接触であることが好ましく、これにより密封性がより確実になる。
【００１８】
この発明のキャップは、刷毛付きでも、刷毛なしでも、或いはねじキャップでも、ねじなしキャップでも何れも使用することができる。
【００１９】
【実施例】
この発明の実施例を図１（ａ）、（ｂ）、（ｃ）について説明する。図１（ｂ）において、合成樹脂キャップ１を缶口２に螺合し、回転して締め付けると、合成樹脂キャップ１が矢示３の方向へ移動するので、合成樹脂キャップ１の環状突条４の下端の斜切部４ａは、矢示５の方向へ変形して、缶口２の段部２ａの縦壁２ｂに弾力的に当接する。
【００２０】
何故ならば、前記環状突条４の下端の斜切部４ａは、外側を下とするように傾斜しているので、環状突条４が弾性変形し易いからである（図１−（ｄ））。
【００２１】
また図１−（ｃ）のように段部２ａの縦壁２ｂを、内側へ若干傾斜（例えば５度〜１０度）させておけば、環状突条４は縦壁２ｂに案内されて図（ｄ）のように若干内側へ弾性変形し、縦壁２ｂの内側へ弾力的に当接できる。
【００２２】
次に図１は、合成樹脂キャップ１に刷毛６をつける構造であり、図３は刷毛なしの一般的合成樹脂キャップであるが、刷毛６の有無に関係なく、この発明を使用することができる。
【００２３】
前記弾力当接面の幅（高さ）は、１．５ｍｍ前後あれば密封性を確保できることが判明している。
【００２４】
また、段部２ａの縦壁２ｂの傾斜は、５度〜１０度位であり、段部２ａの傾斜角度は水平面に対し、１５度〜２０度である。
【００２５】
【発明の効果】
この発明は、合成樹脂キャップに設けた環状突条の下端外側部と、缶口部の段部縦壁とを弾力的に当接（面当接）したので、密封が確実になるのみならず、弾力は締め付け力と直接関係しないので、弾性限度以上に締め付けるおそれはないなどの効果がある。
【００２６】
また、この発明によれば、密封性は環状突条の面接触により保たれ、キャップのねじ（斜に切ってある）との関係なく缶内圧が高くなっても密封性に影響がないなどの諸効果がある。
【図面の簡単な説明】
【図１】（ａ）この発明の実施例の一部を省略した断面拡大図。
（ｂ）同じく一部断面拡大図。
（ｃ）同じく密封部分の密封直前の説明図。
（ｄ）同じく密封完了の説明図。
【図２】（ａ）同じく缶の天板の実施例の平面図。
（ｂ）同じく一部断面した正面図。
【図３】この発明の他の実施例の断面拡大図。
【図４】（ａ）従来例の断面拡大図。
（ｂ）同じく一部断面拡大図。
【符号の説明】
１ 合成樹脂キャップ
２ 缶口
４ 環状突条
５ 刷毛[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a can mouth sealing cap and a sealing device for sealing a can mouth cap and a can mouth portion by elastic surface contact.
[0002]
[Prior art]
As a conventional can mouth sealing device, an elastic packing is interposed between the can mouth cap and the can mouth portion, or a protrusion provided on the inner lower end of the can mouth cap is pressed against the can mouth portion plane (for example, Some of them are known to be pressurized by screwing.
[0003]
Further, as shown in FIG. 4, there has been known a sealing device in which an annular ridge 4 is provided inside the synthetic resin cap 1 and the lower end of the annular ridge is brought into contact with the horizontal step portion 2 a of the can mouth 2. .
[0004]
In this case, the outer wall of the annular protrusion 4 had a slight gap S with the vertical wall 2b of the horizontal step portion 2a.
[0005]
[Patent Document 1]
JP 2000-281116 A
[0006]
[Problems to be solved by the invention]
In the conventional sealing device, since the contact surface between the can mouth cap and the can mouth portion is a horizontal surface, the sealing degree is determined by the degree of tightening of the can mouth cap. There is a problem that uneven contact pressure due to characteristics cannot be avoided.
[0007]
Therefore, when the tightening force is small, the sealing degree may be small. When the tightening force is large, the sealing degree is large, but the packing is deformed more than elastic deformation by tightening, and the packing loses elasticity. On the other hand, there was a problem that the sealing degree was reduced.
[0008]
Therefore, the object can be achieved by tightening within the elastic limit so as not to lose the elasticity of the annular ridge, but there is a problem that the degree of complete sealing within the elastic limit is unclear.
[0009]
[Means for Solving the Problems]
The present invention provides the above-mentioned conventional problems by providing an annular ridge on the inside of the can mouth sealing cap, and elastically abutting the lower outer side of the annular ridge against the stepped vertical wall of the can mouth. It was solved.
[0010]
That is, the invention of the cap includes a vertical wall 2b extending from the outer peripheral edge toward the inside of the can and then extending downward in the vertical direction, and a step portion 2a extending from the lower end of the vertical wall 2b toward the inside of the can. The vertical wall 2b is inclined at a range of 5 to 10 degrees so that the lower end of the vertical wall 2b is inclined toward the inside of the can, and the stepped portion 2a faces upward in the can. A can mouth sealing cap for sealing a can having a can mouth portion inclined in a range of 15 to 20 degrees with respect to a horizontal plane so as to be inclined, and is formed inside the synthetic resin cap, Is an annular ridge 4 that comes into contact with the can mouth portion, and tapers on the inner side of the lower end of the annular ridge 4 toward the lower end of the annular ridge 4 that is the tip of the annular ridge 4. When an annular ridge 4 having an annular bevel 4a is provided and the can is sealed The lower end side of the annular protrusion 4 of the synthetic resin cap is elastically deformed toward the inside of the can by being guided by the vertical wall 2b, and the outer side of the lower end side of the annular protrusion 4 is elastic to the vertical wall 2b. It is a can mouth sealing cap characterized in that it abuts. Here, the synthetic resin cap is a screw cap having a brush attachment tube in the center.
[0011]
In addition, the invention of the device includes a vertical wall 2b extending from the outer peripheral edge toward the inside of the can and then extending downward in the vertical direction, and a step portion 2a extending from the lower end of the vertical wall 2b toward the inside of the can. The vertical wall 2b is inclined at a range of 5 to 10 degrees so that the lower end of the vertical wall 2b is inclined toward the inside of the can, and the stepped portion 2a faces upward in the can. A can having a can mouth portion which is inclined in a range of 15 to 20 degrees with respect to a horizontal plane, and a can mouth sealing cap for sealing the can, which is formed inside the synthetic resin cap. The lower portion of the annular ridge 4 is in contact with the can mouth portion, toward the inner side of the lower end of the annular ridge 4 toward the lower end of the annular ridge 4 that is the tip of the annular ridge 4. Therefore, it is provided with an annular ridge 4 having an annular slanted cut portion 4a, and the can is sealed. In this case, the lower end side of the annular ridge 4 of the synthetic resin cap is guided by the vertical wall 2b and elastically deforms toward the inside of the can, and the outer side of the lower end side of the annular ridge 4 is the vertical wall. It is a can mouth sealing device characterized by comprising a can mouth sealing cap that elastically contacts 2b. Here, the synthetic resin cap is a screw cap and has a brush mounting tube in the center.
[0012]
In the above, in order to elastically deform the lower end portion of the annular ridge and bring it into elastic contact with the step portion of the can mouth portion, the lower end of the annular ridge is brought into contact with the inclined surface on the outer lower side of the can mouth step portion. When the cap is tightened, the lower end of the annular ridge is shifted to the outside and elastically contacts the step vertical wall of the can mouth portion, and the step vertical wall of the can mouth portion is slightly inclined There is a method in which the lower end of the annular ridge is elastically deformed inward and sealed by its elasticity, both of which can be adopted. In such a case, even if the internal pressure of the can rises, the contact portion is pressed and the sealing performance is improved.
[0013]
The synthetic resin used for the cap in this invention is, for example, polyethylene, polypropylene, nylon, etc., and various synthetic resins used for conventional caps having appropriate elasticity can be used.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention, an annular protrusion is provided on the inner side of the synthetic resin cap so that the lower part can come into contact with the can mouth part, and the lower end outer part of the annular protrusion and the stepped vertical wall of the can mouth part are in elastic contact. It is something to be made.
[0015]
The elasticity can be obtained by elastic deformation that occurs as the cap is tightened at the lower end of the annular ridge.
[0016]
The elastic deformation is preferably not influenced by the tightening force, and it is necessary to prevent the elastic force from being lost by increasing the tightening force.
[0017]
It is preferable that the abutting portion is in surface contact, and thereby the sealing performance becomes more reliable.
[0018]
The cap of the present invention can be used with a brush, without a brush, with a screw cap, or with a screwless cap.
[0019]
【Example】
An embodiment of the present invention will be described with reference to FIGS. 1 (a), (b) and (c). In FIG. 1 (b), when the synthetic resin cap 1 is screwed into the can mouth 2 and rotated and tightened, the synthetic resin cap 1 moves in the direction of the arrow 3, so that the annular protrusion 4 of the synthetic resin cap 1. The bevel cut portion 4a at the lower end of the bottom is deformed in the direction of the arrow 5 and elastically contacts the vertical wall 2b of the step portion 2a of the can mouth 2.
[0020]
This is because the oblique cut portion 4a at the lower end of the annular ridge 4 is inclined so that the outer side is down, so that the annular ridge 4 is easily elastically deformed (FIG. 1- (d)). ).
[0021]
If the vertical wall 2b of the stepped portion 2a is slightly inclined inward (for example, 5 to 10 degrees) as shown in FIG. 1- (c), the annular ridge 4 is guided by the vertical wall 2b (FIG. It is elastically deformed slightly inward as in d) and can be elastically contacted to the inside of the vertical wall 2b.
[0022]
Next, FIG. 1 shows a structure in which the brush 6 is attached to the synthetic resin cap 1, and FIG. 3 shows a general synthetic resin cap without the brush, but the present invention can be used regardless of the presence or absence of the brush 6. .
[0023]
It has been found that if the width (height) of the elastic contact surface is about 1.5 mm, the sealing performance can be secured.
[0024]
Moreover, the inclination of the vertical wall 2b of the step part 2a is about 5 to 10 degrees, and the inclination angle of the step part 2a is 15 to 20 degrees with respect to the horizontal plane.
[0025]
【The invention's effect】
In this invention, the outer side of the lower end of the annular ridge provided on the synthetic resin cap and the stepped vertical wall of the can mouth portion are elastically contacted (surface contact), so that not only the sealing is ensured Since the elasticity is not directly related to the tightening force, there is an effect that there is no possibility of tightening beyond the elastic limit.
[0026]
Further, according to the present invention, the sealing performance is maintained by the surface contact of the annular ridge, and the sealing performance is not affected even if the internal pressure of the can increases regardless of the cap screw (cut obliquely). There are various effects.
[Brief description of the drawings]
FIG. 1A is an enlarged cross-sectional view in which a part of an embodiment of the present invention is omitted.
(B) Partially enlarged sectional view.
(C) Explanatory drawing just before sealing of a sealing part.
(D) Explanatory drawing of completion of sealing similarly.
FIG. 2A is a plan view of an embodiment of the top plate of the can.
(B) The front view which carried out the partial cross section similarly.
FIG. 3 is an enlarged cross-sectional view of another embodiment of the present invention.
FIG. 4A is an enlarged sectional view of a conventional example.
(B) A partially enlarged sectional view.
[Explanation of symbols]
1 Synthetic Resin Cap 2 Can Port 4 Annular Rib 5 Brush

Claims (4)

外周縁から缶の内側に向かって延びた後、縦方向下側に向かって延びる縦壁（２ｂ）と、当該縦壁（２ｂ）の下端から缶の内側に向かって延びる段部（２ａ）とを備えていると共に、
前記縦壁（２ｂ）はその下端が缶の内側に向かって傾斜するように、５〜１０度の範囲で傾斜しており、前記段部（２ａ）は、缶の上方向に向かって傾斜するように、水平面に対して１５〜２０度の範囲で傾斜している缶口部を有する缶を密封する缶口密封キャップであって、
合成樹脂キャップの内側に形成されていて、下部が缶口部と当接する環状突条（４）であって、当該環状突条（４）の下端の内側部に、当該環状突条（４）の先端である当該環状突条（４）の下端に向かうにしたがって先細になる環状の斜切部（４ａ）を有する環状突条（４）を備え、
前記缶を密封する際に、前記合成樹脂キャップの環状突条（４）の下端側が、前記縦壁（２ｂ）に案内されて缶の内側に向かって弾性変形し、
環状突条（４）の下端側の外側部が、前記縦壁（２ｂ）に弾力的に当接する
ことを特徴とする缶口密封キャップ。 A vertical wall (2b) extending from the outer peripheral edge toward the inside of the can and then extending downward in the vertical direction, and a step portion (2a) extending from the lower end of the vertical wall (2b) toward the inside of the can With
The vertical wall (2b) is inclined in the range of 5 to 10 degrees so that the lower end thereof is inclined toward the inside of the can, and the stepped portion (2a) is inclined upward in the can. A can mouth sealing cap for sealing a can having a can mouth portion inclined in a range of 15 to 20 degrees with respect to a horizontal plane,
An annular ridge (4) formed on the inner side of the synthetic resin cap and having a lower portion in contact with the can mouth portion. The annular ridge (4) is formed on the inner side of the lower end of the annular ridge (4). An annular ridge (4) having an annular oblique cut portion (4a) that tapers toward the lower end of the annular ridge (4), which is the tip of
When sealing the can, the lower end side of the annular protrusion (4) of the synthetic resin cap is guided by the vertical wall (2b) and elastically deformed toward the inside of the can,
A can mouth sealing cap , wherein an outer side of the lower end side of the annular ridge (4) elastically contacts the vertical wall (2b) . 合成樹脂キャップは、ねじキャップであって、中央部に刷毛の取付筒を有することを特徴とする請求項１記載の缶口密封キャップ。2. The can mouth sealing cap according to claim 1, wherein the synthetic resin cap is a screw cap and has a brush mounting tube in the center. 外周縁から缶の内側に向かって延びた後、縦方向下側に向かって延びる縦壁（２ｂ）と、当該縦壁（２ｂ）の下端から缶の内側に向かって延びる段部（２ａ）とを備えていると共に、
前記縦壁（２ｂ）はその下端が缶の内側に向かって傾斜するように、５〜１０度の範囲で傾斜しており、前記段部（２ａ）は、缶の上方向に向かって傾斜するように、水平面に対して１５〜２０度の範囲で傾斜している缶口部を有する缶と、
当該缶を密封する缶口密封キャップであって、
合成樹脂キャップの内側に形成されていて、下部が缶口部と当接する環状突条（４）であって、当該環状突条（４）の下端の内側部に、当該環状突条（４）の先端である当該環状突条（４）の下端に向かうにしたがって先細になる環状の斜切部（４ａ）を有する環状突条（４）を備え、
前記缶を密封する際に、前記合成樹脂キャップの環状突条（４）の下端側が、前記縦壁（２ｂ）に案内されて缶の内側に向かって弾性変形し、
環状突条（４）の下端側の外側部が、前記縦壁（２ｂ）に弾力的に当接する
缶口密封キャップ
とからなることを特徴とする缶口密封装置。 A vertical wall (2b) extending from the outer peripheral edge toward the inside of the can and then extending downward in the vertical direction, and a step portion (2a) extending from the lower end of the vertical wall (2b) toward the inside of the can With
The vertical wall (2b) is inclined in the range of 5 to 10 degrees so that the lower end thereof is inclined toward the inside of the can, and the stepped portion (2a) is inclined upward in the can. A can having a can mouth portion inclined in a range of 15 to 20 degrees with respect to a horizontal plane,
A can mouth sealing cap for sealing the can,
An annular ridge (4) formed on the inner side of the synthetic resin cap and having a lower portion in contact with the can mouth portion. The annular ridge (4) is formed on the inner side of the lower end of the annular ridge (4). An annular ridge (4) having an annular oblique cut portion (4a) that tapers toward the lower end of the annular ridge (4), which is the tip of
When sealing the can, the lower end side of the annular protrusion (4) of the synthetic resin cap is guided by the vertical wall (2b) and elastically deformed toward the inside of the can,
The outer side on the lower end side of the annular ridge (4) elastically contacts the vertical wall (2b).
Can mouth sealing cap
Cans port sealing apparatus characterized by comprising a. 合成樹脂キャップは、ねじキャップであって、中央部に刷毛の取付筒を有することを特徴とする請求項３記載の缶口密封装置。4. The can mouth sealing device according to claim 3 , wherein the synthetic resin cap is a screw cap and has a brush mounting tube in the center.
JP2003005592A 2003-01-14 2003-01-14 Can mouth sealing cap and sealing device Expired - Fee Related JP3959430B2 (en)

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JP3959430B2 true JP3959430B2 (en) 2007-08-15

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0332055U (en) * 1989-08-07 1991-03-28
JP2948745B2 (en) * 1995-05-02 1999-09-13 花王株式会社 Container
JP3627293B2 (en) * 1995-06-26 2005-03-09 凸版印刷株式会社 Plug
JP3031849U (en) * 1996-05-30 1996-12-03 有限会社ホタカ・ピー・シー Screw cap for can container

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