JP4373522B2 - Plastic cap - Google Patents

Plastic cap Download PDF

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Publication number
JP4373522B2
JP4373522B2 JP07669199A JP7669199A JP4373522B2 JP 4373522 B2 JP4373522 B2 JP 4373522B2 JP 07669199 A JP07669199 A JP 07669199A JP 7669199 A JP7669199 A JP 7669199A JP 4373522 B2 JP4373522 B2 JP 4373522B2
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JP
Japan
Prior art keywords
annular
lid
synthetic resin
upper lid
air escape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP07669199A
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Japanese (ja)
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JP2000272648A (en
Inventor
輝昭 林田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mikasa Sangyo Co Ltd
Original Assignee
Mikasa Sangyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mikasa Sangyo Co Ltd filed Critical Mikasa Sangyo Co Ltd
Priority to JP07669199A priority Critical patent/JP4373522B2/en
Publication of JP2000272648A publication Critical patent/JP2000272648A/en
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Publication of JP4373522B2 publication Critical patent/JP4373522B2/en
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Expired - Fee Related legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
この発明は、瓶などの口部に装着される合成樹脂製キャップに関するものであり、更に述べると、上蓋内に発生する高圧空気を逃がすことのできる合成樹脂製キャップに関するものである。
【0002】
【従来の技術】
従来の合成樹脂製キャップは注出筒部を有し、かつ、その外周側に係合凹部を有する中蓋と、該中蓋に嵌着され、かつ、その側壁部内面下部に係合突起を有する上蓋と、を備えている。この合成樹脂製キャップを容器口部に装着する場合には、まず容器内に内容物を充填する。特に、内容物がつゆ類、たれ類等の比較的低塩分濃度の液体食品調味料の場合は、殺菌のため70゜〜90゜に加熱された状態で容器に充填される。
内容物を充填後、中蓋に上蓋を嵌着させたキャップを容器の口部に打栓などにより装着する。該キャップを口部に装着後、必要に応じて該容器は60度〜70度程度の温水により洗浄される。
【0003】
この充填工程後や洗浄工程中において、上蓋の内方空間が上蓋と中蓋とにより密閉されているので、上蓋内の空気が加熱により膨張して上蓋が押し上げられ、上蓋と中蓋の係合が外れてしまい、上蓋が浮き上がったり、又は、上蓋が開いてしまうことがある。そのため、温水やゴミなどが上蓋内に侵入し不衛生であると共に、上蓋を押圧して閉め直さなければならないので、手数がかかろ。
【0004】
そこでこの問題を解決するため、次のような合成樹脂製キャップが用いられている(実公平8−2124号公報参照)。
容器口部へ取り付ける中蓋であって、該中蓋の天板部上面に注出筒を有するとともに、該注出筒内方の中蓋天板部に注出用開口除去部を有する中蓋と、該中蓋に嵌合する上蓋とで構成され、前記注出筒の内面に密着する環状突出部を上蓋に於ける天板部の下面に有する構造の二重合成樹脂製キャップにおいて、上蓋天板部における環状突出部位置よりも中央部分の肉厚を、上蓋天板部における環状突出部位置よりも周縁部分である上天板部の肉厚の約2分の1としたことを特徴とする液体用二重合成樹脂製キャップ。
【0005】
【発明が解決しようとする課題】
前記合成樹脂製キャップは、上蓋天板部を肉薄にしこの部分の変形により、圧力上昇を吸収しようとするものであるが、次の様な問題がある。
(1)上蓋天板部の変形量に限度があるため、圧力上昇防止効果が不十分である。そのため、圧力上昇を吸収しきれずに上蓋が開いてしまう。
【0006】
(2)上蓋天板部が薄肉で変形しやすいので、キャップを打栓装着するとき、中蓋の上壁に形成されたスコアが破損しやすい。その上、上蓋の開閉操作時に該天板部が変形するので、感触が悪くなる。
【0007】
この発明は、上記事情に鑑み、上蓋内の圧力上昇により上蓋が開かない様にすることを目的とする。
【0008】
【課題を解決するための手段】
この発明は、上壁の上面に注出筒を設け、該注出筒内方に断壁を設けるとともに、該注出筒の外周側に環状係止部を設けた中蓋と、該中蓋に嵌着され、かつ、側壁部内面に前記環状係止部と係合する環状係合部を設けた上蓋と、を備えた合成樹脂製キャップにおいて;前記環状係合部と環状係止部は、互いに密着し、かつ、断面形状が曲面状の環状シール面を有し、前記環状係合部と環状係止部の少なくとも一方は、他方の環状シール面に連続する環状当接面、あるいは、環状シール面と当接する、前記環状シール面に連続する環状当接面を有し、前記環状当接面が、前記環状シール面に連続する空気逃がし手段を備えていることを特徴とする。
【0009】
【発明の実施の形態】
打栓時等において、上蓋内の圧力が上昇すると、上蓋が上方向の力を受けて開蓋方向に変位するので、上蓋の環状係合部は中蓋の環状係止部の環状シール面及び環状当接面に沿って上昇する。そして、その上昇途中において両シール面は離れ、環状係合部の環状シール面は環状係止部の環状当接面に当接する。この時、上蓋内の空気は環状当接面の空気逃がし手段を介して大気中に放出される。
【0010】
この空気逃がし手段は、環状シール面と環状当接面とを備えた環状係合部及び環状係止部のいずれか一方の環状当接面、又は、双方の環状当接面に、該環状シール面と連続する空気逃がし溝である。又、空気逃がし溝にかえて上下方向の小突起又は隣接する上下方向の2本の小突起に囲まれた凹部を空気逃がし手段として用いることもできる。
【0011】
この環状係合部、例えば、係合突起は上蓋に形成され、環状係止部、例えば、係合凹状は中蓋に形成されるが、前記と逆に、即ち、上蓋に係合凹部を形成し、中蓋に係合突起を設けてもよい。
【0012】
空気逃がし溝を介して上蓋内の空気が大気中に排出される時、環状係合部と環状係止部とはまだ係合状態を維持しており、上蓋内の圧力が低下すると、該上蓋は大気圧により押圧されて降下する。そのため、環状係止部と環状係合部とは元の係合状態に戻る。
【0013】
【実施例】
この発明の第1実施例を図1〜図5により説明する。
合成樹脂製キャップ1は、容器口部に取付けられる中蓋2と、該中蓋2に嵌着される上蓋20とを備えている。
【0014】
中蓋2には、筒部3の上端を閉鎖する上壁4が設けられている。この上壁4の上面には注出筒5が立設され、その内側にはスコア6に囲まれた切断壁7が設けられている。該切断壁7の先端部にはプルリング8が設けられている。
【0015】
注出筒5の外側には、同心状の環状係止部、例えば、係合凹部9が設けられている。この係合凹部9には、環状シール面9aと、環状当接面9bとが設けられている。この当接面9bは、該シール面9aの下端に連続している。
【0016】
筒部3の内面には、環状突部11が設けられ、この突部11は図示しない容器口部の外周凹部に係合する。この容器口部は該筒部3と内筒部10により挾まれる。
【0017】
上蓋20は、天板部21と側壁部22とを備えている。この天板部21の裏面には環状突出部21a、21bが設けられているが、この環状突出部21a、21bは閉蓋時、注出筒5の先端部5aに当接しシール作用をする。
【0018】
側壁部22の下端部内面には、環状係合部、例えば、係合突起25が設けられている。この係合突起25の係合表面は断面円弧状となっており、環状シール面25aと環状当接面25bとを備えている。該シール面25aは、閉蓋時に係合凹部9の環状シール面9aと密着する。
該環状当接面25bは、前記環状シール面25aの下端に連続するとともに、該係合凹部9の環状当接面9bに当接する。
【0019】
前記環状当接面25bには、空気逃がし手段が設けられている。この空気逃がし手段26として空気逃がし溝(エアーベント)が用いられる。この空気逃がし溝26の長さ、方向、深さ、本数、形状等は必要に応じて適宜選択される。
例えば、この溝26として、前記環状シール面25aの下端に連続する複数本の溝が採用される。
【0020】
次に本実施例の作動について説明する。
閉蓋の状態では、図2に示す様に、注出筒5の先端と環状突出部21a、21bとが密着して内側密封室28が形成され、又、側壁部22の係合突起25の環状シール面25aと係合凹部9の環状シール面9aとが密着して外側密封室29が形成されている。
【0021】
内側密封室28内の空気Aが温度上昇すると、該密封室28内の圧力が上昇するので、図3に示す様に、上蓋20の天板部21が押圧されて変形し、環状突出部21a、21bは注出筒5から離れ、両者5、21a、21b間に隙間が生じる。そのため、前記空気Aは該隙間を通り外側密封室29内に流入する。
この時、前記両環状シール面9a、25aは密封状態を維持しているので、該外側密封室29内の圧力も次第に上昇する。
【0022】
更に、内側密封室28内の圧力が上昇すると、図4に示す様に更に天板部21が上方に変位し、側壁部22も上方に変位する。この時、側壁部22の係合突起25は中蓋2の係合凹部9の環状シール面9a、環状当接面9b上を摺動しながら上昇する。
【0023】
そして、該係合突起25の環状シール面25aの下端が、前記係合凹部9の環状シール面9aから離れると、係合突起の環状当接面25bが係合凹部の環状シール面9aに当接して両者9、25の係合状態が維持されるとともに、前記外側密封室29は空気逃がし溝26を介して大気と連通する。
【0024】
そうすると、前記密封室28、29内の空気は、該空気逃がし溝26から大気中に放出されるので、前記両室28、29の圧力は急激に低下する。そのため、上蓋20を上方に押圧する力は弱まり、側壁部22の上昇は停止するので、上蓋20が開くことはない。
【0025】
その後、充填内溶液の温度低下に伴い、前記両室28、29内の圧力が低下し大気圧以下となると、天板部21は大気により下方に押圧され、図2に示す様に変形前の状態に戻る。
【0026】
この発明の第2実施例を図6により説明する。この実施例と第1実施例との相違点は、中蓋2の係合凹部39の環状シール面39aの上端に環状当接面39bを連続させ、又、側壁部22の係合突起35の環状シール面35aの上端に環状当接面35bを連続して形成するとともに、中蓋の係合凹部39の環状当接面39bに空気逃がし溝46を形成したことである。
【0027】
この実施例では、上蓋20の変位により側壁部22が上昇すると、係合突起35は係合凹部39の環状シール面39a、環状当接面39b上を摺動しながら上昇する。
そして、環状シール面35aの下端が前記環状シール面39aから離れると、係合凹部の環状当接面39bに当接して両者間の係合状態が維持されるとともに、外側密閉室29は空気逃がし溝46を介して大気と連通する。
【0028】
この発明の実施例は、上記に限定されるものではなく、例えば、中蓋に係合凹部を設け、上蓋の側壁部に係合突起を設ける代わりに、その逆、即ち、中蓋に係合突起を設け、上蓋の側壁部に係合凹部を設けてもよい。又、上蓋はヒンジを介して中蓋に連結する所謂ヒンジ蓋が好適に用いられる。
【0029】
【発明の効果】
この発明は、以上の様に環状当接面に空気逃がし手段を設けたので、上蓋内の圧力が上昇し上蓋が変形して環状係合部が変位すると、該上蓋内の空気は空気逃がし手段を介して大気に放出される。そのため、上蓋内の圧力が低下するので、蓋が開くことがないとともに、容器内溶液の温度の低下に伴い、上蓋内の圧力が大気圧以下になると該上蓋は元の密閉された状態に戻る。
【図面の簡単な説明】
【図1】この発明の第1実施例を示す縦断面図である。
【図2】図1の要部拡大図である。
【図3】図2の他の状態を示す断面図で、上蓋内の圧力が上昇した状態を示す図である。
【図4】図2の更に他の状態を示す断面図で、上蓋内の圧力が更に上昇した状態を示す図である。
【図5】係合突起と係合凹部との係合状態を示す拡大断面図である。
【図6】この発明の第2実施例を示す断面図で、図5に対応するものである。
【符号の説明】
2 中蓋
9 係合凹部
9a 環状シール面
9b 環状当接面
20 上蓋
25 係合突起
25a 環状シール面
25b 環状当接面
26 空気逃がし溝
35 係合突起
35a 環状シール面
35b 環状当接面
39 係合凹部
39a 環状シール面
39b 環状当接面
46 空気逃がし溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin cap that is attached to a mouth portion of a bottle or the like. More specifically, the present invention relates to a synthetic resin cap that can release high-pressure air generated in an upper lid.
[0002]
[Prior art]
A conventional synthetic resin cap has a pour cylinder portion, an inner lid having an engagement recess on its outer peripheral side, and an engagement protrusion that is fitted to the inner lid and is formed on the inner wall lower portion of the side wall portion. And an upper lid. When the synthetic resin cap is attached to the container mouth, the container is first filled with contents. In particular, in the case of liquid food seasonings having a relatively low salinity such as soups and sauces, the contents are filled in the container while being heated to 70 ° to 90 ° for sterilization.
After filling the contents, a cap with the upper lid fitted to the inner lid is attached to the mouth of the container by plugging or the like. After the cap is attached to the mouth, the container is washed with hot water of about 60 to 70 degrees as necessary.
[0003]
After the filling process and during the cleaning process, the inner space of the upper lid is sealed by the upper lid and the inner lid, so that the air in the upper lid expands by heating and the upper lid is pushed up, and the upper lid and the inner lid are engaged. May come off and the top lid may float or the top lid may open. For this reason, warm water and dust enter the upper lid and are unsanitary, and the upper lid must be pressed and closed again, which is troublesome.
[0004]
In order to solve this problem, the following synthetic resin cap is used (see Japanese Utility Model Publication No. 8-2124).
An inner lid to be attached to the container mouth, having an extraction tube on the top surface of the top plate portion of the inner lid, and an extraction lid removing portion on the inner lid top plate portion inside the extraction tube And a double synthetic resin cap having a structure in which the upper cover is fitted to the inner lid, and has an annular projecting portion in close contact with the inner surface of the pouring tube on the lower surface of the top plate portion of the upper lid. The thickness of the central portion of the top plate portion relative to the annular projection portion position is set to about one half of the thickness of the upper top plate portion which is the peripheral portion of the top lid top plate portion rather than the annular projection portion position. Double synthetic resin cap for liquid.
[0005]
[Problems to be solved by the invention]
The synthetic resin cap is intended to absorb the pressure increase by thinning the top lid top plate portion and deforming this portion, but has the following problems.
(1) Since there is a limit to the amount of deformation of the top lid top plate, the effect of preventing pressure rise is insufficient. Therefore, the upper lid opens without fully absorbing the pressure increase.
[0006]
(2) Since the top lid top plate is thin and easily deformed, the score formed on the top wall of the inner lid is liable to be damaged when the cap is worn. In addition, since the top plate portion is deformed when the upper lid is opened and closed, the feeling becomes worse.
[0007]
In view of the above circumstances, an object of the present invention is to prevent the upper lid from opening due to an increase in pressure in the upper lid.
[0008]
[Means for Solving the Problems]
The present invention, the pouring cylinder to the upper surface of the upper wall is provided, along with providing the infusion exit tube switching Dankabe inwardly, the inner cover having an annular engaging portion on the outer peripheral side of the infusion out cylinder, intermediate A synthetic resin cap provided with an upper lid fitted with a lid and provided with an annular engagement portion that engages with the annular engagement portion on the inner surface of the side wall; the annular engagement portion and the annular engagement portion Has an annular seal surface that is in close contact with each other and has a curved cross-sectional shape, and at least one of the annular engagement portion and the annular locking portion is an annular contact surface that is continuous with the other annular seal surface, or abuts an annular sealing surface, an annular abutment surface continuous with said annular sealing surface, said annular abutment surface, characterized in that it comprises an air relief means contiguous to said annular sealing surface.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
When the pressure in the upper lid rises, for example, at the time of plugging, the upper lid receives an upward force and is displaced in the opening direction. Therefore, the annular engagement portion of the upper lid is formed by the annular sealing surface of the annular locking portion of the inner lid and It rises along the annular contact surface. In the middle of the rise, both seal surfaces are separated, and the annular seal surface of the annular engagement portion comes into contact with the annular contact surface of the annular locking portion. At this time, the air in the upper lid is released into the atmosphere via the air escape means on the annular contact surface.
[0010]
This air escape means is provided on the annular contact surface of the annular engagement portion and the annular engagement portion having the annular seal surface and the annular contact surface, or on both annular contact surfaces. An air relief groove continuous with the surface. Further, instead of the air escape groove, a vertical protrusion or a recess surrounded by two adjacent vertical protrusions can be used as the air release means.
[0011]
The annular engaging portion, for example, the engaging protrusion is formed on the upper lid, and the annular engaging portion, for example, the engaging concave shape is formed on the inner lid, but in the opposite manner, that is, the engaging concave portion is formed on the upper lid. In addition, an engagement protrusion may be provided on the inner lid.
[0012]
When the air in the upper lid is discharged into the atmosphere through the air escape groove, the annular engagement portion and the annular locking portion are still in the engaged state, and when the pressure in the upper lid decreases, the upper lid Falls by being pressed by atmospheric pressure. Therefore, the annular locking portion and the annular engagement portion return to the original engagement state.
[0013]
【Example】
A first embodiment of the present invention will be described with reference to FIGS.
The synthetic resin cap 1 includes an inner lid 2 attached to the container mouth portion, and an upper lid 20 fitted to the inner lid 2.
[0014]
The inner lid 2 is provided with an upper wall 4 that closes the upper end of the cylindrical portion 3. A pouring cylinder 5 is erected on the upper surface of the upper wall 4, and a cutting wall 7 surrounded by a score 6 is provided on the inside thereof. A pull ring 8 is provided at the tip of the cutting wall 7.
[0015]
A concentric annular locking portion, for example, an engagement recess 9 is provided on the outside of the dispensing tube 5. The engagement recess 9 is provided with an annular seal surface 9a and an annular contact surface 9b. The contact surface 9b is continuous with the lower end of the seal surface 9a.
[0016]
An annular protrusion 11 is provided on the inner surface of the cylindrical portion 3, and this protrusion 11 engages with an outer peripheral recess of a container mouth portion (not shown). The container mouth portion is sandwiched between the cylindrical portion 3 and the inner cylindrical portion 10.
[0017]
The upper lid 20 includes a top plate portion 21 and a side wall portion 22. Although the annular projections 21a and 21b are provided on the back surface of the top plate portion 21, the annular projections 21a and 21b abut against the distal end portion 5a of the dispensing cylinder 5 and perform a sealing action when the lid is closed.
[0018]
An annular engagement portion, for example, an engagement protrusion 25 is provided on the inner surface of the lower end portion of the side wall portion 22. The engagement surface of the engagement protrusion 25 has an arcuate cross section, and includes an annular seal surface 25a and an annular contact surface 25b. The seal surface 25a is in close contact with the annular seal surface 9a of the engaging recess 9 when the lid is closed.
The annular contact surface 25b is continuous with the lower end of the annular seal surface 25a and contacts the annular contact surface 9b of the engagement recess 9.
[0019]
The annular contact surface 25b is provided with air escape means. An air escape groove (air vent) is used as the air escape means 26. The length, direction, depth, number, shape, and the like of the air escape groove 26 are appropriately selected as necessary.
For example, as the groove 26, a plurality of grooves continuous to the lower end of the annular seal surface 25a are employed.
[0020]
Next, the operation of this embodiment will be described.
In the closed state, as shown in FIG. 2, the tip of the dispensing tube 5 and the annular protrusions 21 a and 21 b are in close contact to form an inner sealed chamber 28, and the engagement protrusion 25 of the side wall 22 The outer sealing chamber 29 is formed by closely contacting the annular sealing surface 25a and the annular sealing surface 9a of the engaging recess 9.
[0021]
When the temperature of the air A in the inner sealed chamber 28 rises, the pressure in the sealed chamber 28 increases, so that the top plate portion 21 of the upper lid 20 is pressed and deformed as shown in FIG. , 21b is separated from the dispensing cylinder 5, and a gap is generated between the two, 21a, 21b. Therefore, the air A flows into the outer sealed chamber 29 through the gap.
At this time, since both the annular sealing surfaces 9a and 25a maintain the sealed state, the pressure in the outer sealing chamber 29 gradually increases.
[0022]
Further, when the pressure in the inner sealed chamber 28 increases, the top plate portion 21 is further displaced upward as shown in FIG. 4, and the side wall portion 22 is also displaced upward. At this time, the engagement protrusion 25 of the side wall portion 22 rises while sliding on the annular seal surface 9 a and the annular contact surface 9 b of the engagement recess 9 of the inner lid 2.
[0023]
When the lower end of the annular seal surface 25a of the engagement protrusion 25 is separated from the annular seal surface 9a of the engagement recess 9, the annular contact surface 25b of the engagement protrusion contacts the annular seal surface 9a of the engagement recess. The engagement state of the both 9 and 25 is maintained in contact with each other, and the outer sealing chamber 29 communicates with the atmosphere through the air escape groove 26.
[0024]
Then, the air in the sealed chambers 28 and 29 is released from the air escape groove 26 into the atmosphere, so that the pressures in both the chambers 28 and 29 rapidly decrease. Therefore, the force which presses the upper lid 20 upward is weakened, and the rise of the side wall portion 22 is stopped, so that the upper lid 20 does not open.
[0025]
Thereafter, when the pressure in the chambers 28 and 29 is reduced to the atmospheric pressure or less with the temperature drop of the solution in the filling, the top plate portion 21 is pressed downward by the atmosphere, and as shown in FIG. Return to state.
[0026]
A second embodiment of the present invention will be described with reference to FIG. The difference between this embodiment and the first embodiment is that the annular contact surface 39b is made continuous with the upper end of the annular seal surface 39a of the engagement recess 39 of the inner lid 2, and the engagement protrusion 35 of the side wall portion 22 is An annular contact surface 35b is formed continuously at the upper end of the annular seal surface 35a, and an air escape groove 46 is formed in the annular contact surface 39b of the engagement recess 39 of the inner lid.
[0027]
In this embodiment, when the side wall portion 22 rises due to the displacement of the upper lid 20, the engagement protrusion 35 rises while sliding on the annular seal surface 39 a and the annular contact surface 39 b of the engagement recess 39.
When the lower end of the annular seal surface 35a is separated from the annular seal surface 39a, the annular sealing surface 39b contacts the annular contact surface 39b to maintain the engagement state therebetween, and the outer sealed chamber 29 is allowed to escape from the air. It communicates with the atmosphere via the groove 46.
[0028]
The embodiment of the present invention is not limited to the above. For example, instead of providing an engaging recess in the inner lid and providing an engaging protrusion on the side wall of the upper lid, the reverse, that is, engaging the inner lid. A protrusion may be provided, and an engaging recess may be provided in the side wall portion of the upper lid. The upper lid is preferably a so-called hinge lid that is connected to the middle lid via a hinge.
[0029]
【The invention's effect】
In the present invention, since the air escape means is provided on the annular contact surface as described above, when the pressure in the upper lid rises and the upper lid is deformed and the annular engagement portion is displaced, the air in the upper lid is air escape means. Is released into the atmosphere via Therefore, since the pressure in the upper lid is lowered, the lid is not opened, and when the pressure in the upper lid becomes lower than the atmospheric pressure as the temperature of the solution in the container falls, the upper lid returns to the original sealed state. .
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
3 is a cross-sectional view showing another state of FIG. 2 and showing a state in which the pressure in the upper lid has increased. FIG.
4 is a cross-sectional view showing still another state of FIG. 2 and showing a state in which the pressure in the upper lid is further increased. FIG.
FIG. 5 is an enlarged cross-sectional view showing an engagement state between an engagement protrusion and an engagement recess.
FIG. 6 is a cross-sectional view showing a second embodiment of the present invention and corresponds to FIG.
[Explanation of symbols]
2 Middle lid 9 Engaging recess 9a Annular seal surface 9b Annular abutment surface 20 Upper lid 25 Engagement projection 25a Annular seal surface 25b Annular abutment surface 26 Air escape groove 35 Engagement projection 35a Annular seal surface 35b Annular abutment surface 39 Joint recess 39a Annular seal surface 39b Annular contact surface 46 Air escape groove

Claims (6)

上壁の上面に注出筒を設け、該注出筒内方に断壁を設けるとともに、該注出筒の外周側に環状係止部を設けた中蓋と、該中蓋に嵌着され、かつ、側壁部内面に前記環状係止部と係合する環状係合部を設けた上蓋と、を備えた合成樹脂製キャップにおいて;
前記環状係合部と環状係止部は、互いに密着し、かつ、断面形状が曲面状の環状シール面を有し、前記環状係合部と環状係止部の少なくとも一方は、他方の環状シール面に連続する環状当接面、あるいは、環状シール面と当接する、前記環状シール面に連続する環状当接面を有し、前記環状当接面が、前記環状シール面に連続する空気逃がし手段を備えていることを特徴とする合成樹脂製キャップ。
The pouring cylinder is provided on the upper surface of the upper wall, fitting provided with a infusion exit tube switching Dankabe inwardly, the inner cover having an annular engaging portion on the outer peripheral side of the infusion out cylinder, the intermediate lid And an upper lid provided with an annular engagement portion that engages with the annular locking portion on the inner surface of the side wall portion;
The annular engagement portion and the annular engagement portion have an annular seal surface that is in close contact with each other and has a curved cross-sectional shape, and at least one of the annular engagement portion and the annular engagement portion is the other annular seal. An annular contact surface that is continuous with the surface, or an annular contact surface that is continuous with the annular seal surface that contacts the annular seal surface, and the air release means that the annular contact surface is continuous with the annular seal surface A synthetic resin cap characterized by comprising:
前記空気逃がし手段は、前記環状係合部又は環状係止部のいずれか一方に形成された空気逃がし溝であることを特徴とする請求項1記載の合成樹脂製キャップ。2. The synthetic resin cap according to claim 1, wherein the air escape means is an air escape groove formed in one of the annular engagement portion and the annular locking portion. 前記空気逃がし手段は、前記環状係合部及び環状係止部に形成された空気逃がし溝であることを特徴とする請求項1記載の合成樹脂製キャップ。The synthetic resin cap according to claim 1, wherein the air escape means is an air escape groove formed in the annular engagement portion and the annular locking portion. 前記空気逃がし手段が、縦方向に複数本形成されている空気逃がし溝であることを特徴とする請求項1、2、又は、3記載の合成樹脂製キャップ。4. The synthetic resin cap according to claim 1, 2, or 3, wherein the air escape means is a plurality of air escape grooves formed in the vertical direction. 前記環状係止部が、中蓋に形成された係合凹部であり、
前記環状係合部が、上蓋の側壁部内面に形成された係合突起であることを特徴とする請求項1、2、3、又は、4記載の合成樹脂製キャップ。
The annular locking portion is an engagement recess formed in the inner lid,
The synthetic resin cap according to claim 1, 2, 3, or 4, wherein the annular engaging portion is an engaging protrusion formed on an inner surface of the side wall portion of the upper lid.
上蓋と中蓋が、ヒンジを介して連結されていることを特徴とする請求項1、2、3、4、又は、5記載の合成樹脂製キャップ。The synthetic resin cap according to claim 1, 2, 3, 4, or 5, wherein the upper lid and the inner lid are connected via a hinge.
JP07669199A 1999-03-19 1999-03-19 Plastic cap Expired - Fee Related JP4373522B2 (en)

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JP07669199A JP4373522B2 (en) 1999-03-19 1999-03-19 Plastic cap

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Application Number Priority Date Filing Date Title
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JP4373522B2 true JP4373522B2 (en) 2009-11-25

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Publication number Priority date Publication date Assignee Title
JP4652199B2 (en) * 2005-09-30 2011-03-16 株式会社吉野工業所 Hinge cap
JP4657876B2 (en) * 2005-09-30 2011-03-23 株式会社吉野工業所 Hinge cap
JP4657875B2 (en) * 2005-09-30 2011-03-23 株式会社吉野工業所 Hinge cap
JP4652200B2 (en) * 2005-09-30 2011-03-16 株式会社吉野工業所 Hinge cap
JP5014629B2 (en) * 2005-12-28 2012-08-29 株式会社吉野工業所 Pouring cap
JP4907182B2 (en) * 2006-01-30 2012-03-28 株式会社吉野工業所 Hinge cap
JP4790434B2 (en) * 2006-01-31 2011-10-12 株式会社吉野工業所 Hinge cap
JP4907228B2 (en) * 2006-05-30 2012-03-28 株式会社吉野工業所 Hinge cap
JP4953358B2 (en) * 2006-10-30 2012-06-13 日本クラウンコルク株式会社 Hinge cap
JP4953772B2 (en) * 2006-11-07 2012-06-13 Hoya株式会社 Endoscope forceps plug
JP5004627B2 (en) * 2007-03-28 2012-08-22 日本クラウンコルク株式会社 Hinge cap
JP5073405B2 (en) * 2007-07-31 2012-11-14 株式会社吉野工業所 Hinge cap
JP5832220B2 (en) * 2011-09-30 2015-12-16 株式会社吉野工業所 Hinge cap
JP7402484B2 (en) * 2019-08-01 2023-12-21 三笠産業株式会社 cap

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