JP6671199B2 - cap - Google Patents

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JP6671199B2
JP6671199B2 JP2016052521A JP2016052521A JP6671199B2 JP 6671199 B2 JP6671199 B2 JP 6671199B2 JP 2016052521 A JP2016052521 A JP 2016052521A JP 2016052521 A JP2016052521 A JP 2016052521A JP 6671199 B2 JP6671199 B2 JP 6671199B2
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annular valve
container
annular
valve seat
contents
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JP2017165449A (en
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孝陽 崎村
孝陽 崎村
佐々木　昌
昌 佐々木
植平　庄治
庄治 植平
悟 市川
悟 市川
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Tokyo Light Industry Co Ltd
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Tokyo Light Industry Co Ltd
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Description

本発明は、合成樹脂から成形されたキャップ、特に、醤油等の液状内容物または粘性を有する流動性内容物が充填される容器の容器口部に装着され、容器内の圧力により開閉するキャップに関するものである。   The present invention relates to a cap formed of a synthetic resin, and particularly to a cap which is attached to a container opening of a container filled with liquid content such as soy sauce or a viscous fluid content and which is opened and closed by pressure in the container. Things.

上述した内容物の使用後、キャップの締着が弱いと、容器内の密封状態を維持できず容器内に空気または菌類等が入り、内容物の酸化またはカビ等の繁殖をきたし劣化を早めるなどの問題があった。これを解決するために、容器口部に装着されるキャップには、容器の胴部を圧搾して容器に内圧を加え、適量の内容物を使用した直後、使用者が手でキャップを操作することなく容器内（容器の口部）を密封するものが提案されている。   After use of the above-mentioned contents, if the cap is not tightly tightened, the sealed state in the container cannot be maintained, air or fungi enter the container, and the contents will oxidize or propagate mold and the like, which will accelerate the deterioration. There was a problem. In order to solve this, the user operates the cap by hand immediately after pressing the body of the container to apply internal pressure to the container, and immediately after using an appropriate amount of the contents, to the cap attached to the container mouth. A device that seals the inside of the container (mouth of the container) without the need has been proposed.

例えば、特許文献１には、容器口部に嵌合されるキャップ本体は、前記容器口部に連通する吐出通路と、該吐出通路内に嵌合して、吐出孔を有するベース部と、該ベース部上に配置され、前記吐出孔からの内容物の吐出だけを許容する逆止弁と、を備え、該逆止弁は、前記吐出通路内に嵌合される円筒部と、該円筒部の内壁面から間隙を形成するように中心に向かって放射状に延びる弾性変形可能な複数の弾性片と、該各弾性片の先端に一体に接続され、前記吐出孔の吐出方向下流側にあって、該吐出孔を開閉する弁部材とから構成され、容器への内圧が解除されると、逆止弁の各弾性片が復元するために、弁部材が吐出孔を塞ぎ容器内を密封状態に維持することが開示されている。   For example, in Patent Literature 1, a cap main body fitted to a container mouth portion includes a discharge passage communicating with the container mouth portion, a base portion having a discharge hole fitted into the discharge passage, and A check valve disposed on the base portion and allowing only the discharge of the contents from the discharge hole, the check valve comprising: a cylindrical portion fitted into the discharge passage; and the cylindrical portion. A plurality of elastic pieces that can be elastically deformed and extend radially toward the center so as to form a gap from the inner wall surface, and are integrally connected to the tip of each of the elastic pieces, and are located downstream of the discharge hole in the discharge direction. A valve member that opens and closes the discharge port, and when the internal pressure to the container is released, each elastic piece of the check valve is restored, so that the valve member closes the discharge hole and seals the inside of the container. It is disclosed to maintain.

しかしながら、特許文献１の発明では、内容物を吐出した後、逆止弁が作動することで、吐出通路から吐出されなかった内容物が容器内に戻らずに吐出通路内に残存することになり、蓋体を閉めるときに、蓋体の円筒状閉塞部により内容物が飛散する虞があり、しかも、蓋体を閉めて再び開けると、蓋体の円筒状閉塞部に内容物が付着する虞もあり、改善する必要があった。   However, in the invention of Patent Literature 1, after the content is discharged, the check valve is operated, so that the content not discharged from the discharge passage remains in the discharge passage without returning to the container. When the lid is closed, the contents may be scattered by the cylindrical closing portion of the lid, and when the lid is closed and reopened, the contents may adhere to the cylindrical closing portion of the lid. There was a need to improve.

そこで、これを対策すべき提案された従来技術として特許文献２には、容器口部を閉塞する中栓部材と、該中栓部材を覆うとともに内容物を吐出する吐出口が形成された有頂筒状の本体筒部材と、を備え、中栓部材には、吐出口と容器内とを連通する連通孔が形成され、連通孔内には、当該連通孔の軸線方向に沿って弾性変位して当該連通孔を開閉する弁体部が配設され、弁体部の弁座のうち当該弁体部と接触する部位の一部に、内容物の流通を許容する流通許容溝が形成される吐出キャップであって、内容物を吐出した後、吐出口から外部に吐出されなかった内容物を、この流通許容溝から容器内に戻すことが開示されている。   In order to solve this problem, Japanese Unexamined Patent Application Publication No. 2005-133873 discloses a related art in which an inner plug member for closing a container mouth portion and a discharge port for discharging the contents while covering the inner plug member are formed. A tubular main body tubular member, and the inner plug member is formed with a communication hole communicating the discharge port and the inside of the container, and the communication hole is elastically displaced along the axial direction of the communication hole. A valve body for opening and closing the communication hole is provided, and a flow-permitting groove is formed in a part of the valve seat of the valve body that comes into contact with the valve body. It is disclosed that a discharge cap is used to return the contents which have not been discharged to the outside from a discharge port after discharging the contents, into the container through the flow permission groove.

特開２０１３−２４１１９７号公報JP 2013-241197 A 特開２０１５−１５５３３３号公報JP 2015-155333 A

しかしながら、特許文献２に係る発明では、特に、オーバキャップを閉め忘れた場合、弁本体部と栓本体との間に付着残存した内容物が乾燥固化するために、内容物の使用時に、弁本体部が栓本体内を摺動できず、吐出不良を引き起こす虞がある。
しかも、特許文献２に係る発明では、特に、オーバキャップを閉め忘れた場合、流通許容溝内に残存する内容物が乾燥固化することで、内容物を使用後、閉弁時に、この流通許容溝からの内容物の戻りを阻害する虞がある。 However, in the invention according to Patent Literature 2, especially when the overcap is forgotten to be closed, the remaining content between the valve main body and the plug main body is dried and solidified. The part cannot slide in the stopper main body, and there is a risk of causing a discharge failure.
In addition, in the invention according to Patent Document 2, particularly when the overcap is forgotten to be closed, the contents remaining in the flow-permitting groove are dried and solidified. There is a possibility that the return of the contents from the container may be hindered.

本発明は、かかる点に鑑みてなされたものであり、内容物の使用時には、逆止弁の応答性が良好であり、さらに内容物の使用後は、吐出されなかった内容物の一部を容器内に戻し、僅かな時間後に容器内を密封状態にすることができるキャップを提供することを目的とする。   The present invention has been made in view of such a point, and when the contents are used, the responsiveness of the check valve is good, and after the contents are used, a part of the contents that have not been discharged is removed. It is an object of the present invention to provide a cap which can be returned to the inside of a container and sealed the inside of the container after a short time.

本発明は、上記課題を解決するための手段として、請求項１に記載した発明は、容器口部に装着する筒状のキャップ本体を備えた、合成樹脂製のキャップであって、前記キャップ本体は、容器内の内容物を吐出する吐出通路と、該吐出通路と前記容器口部とを連通する連通孔と、該連通孔周辺に設けられた環状弁座と、該連通孔の軸線方向に沿って弾性変形して、環状弁部が前記環状弁座に着座または離脱することで前記連通孔を開閉する逆止弁と、を備え、前記環状弁部と前記環状弁座との、いずれか一方または両方の接触面が梨地状面に形成されており、前記梨地状面は、金型の表面に放電加工により設けた凹凸形状により成形され、前記金型の表面に設けた粗度（Ｒｚ）は１０〜２００μｍに設定されることを特徴とするものである。
請求項１の発明では、内容物の使用時には、容器の胴部を圧搾して容器に内圧を加えれば、容器の内圧により逆止弁が連通孔の軸線方向に沿って弾性変形して、環状弁部が環状弁座から離脱すると共に連通孔が開放され、内容物が連通孔を介して吐出通路から外部に吐出される。一方、容器への内圧が解除されると、逆止弁が復元して環状弁部が環状弁座に着座するために、連通孔が閉塞されて、速やかに、容器内を密封状態に維持でき、空気の容器内への流入を抑制することができる。 As a means for solving the above-mentioned problems, the present invention provides a synthetic resin cap having a cylindrical cap body attached to a container mouth, the cap body comprising: A discharge passage for discharging the contents in the container, a communication hole communicating the discharge passage with the container opening, an annular valve seat provided around the communication hole, and an axial direction of the communication hole. A check valve that opens and closes the communication hole by being elastically deformed along with the annular valve portion being seated on or disengaged from the annular valve seat, and wherein the annular valve portion and the annular valve seat are provided. One or both of the contact surfaces are formed in a matte surface, and the matte surface is formed by irregularities formed on the surface of the mold by electric discharge machining, and the roughness (Rz) provided on the surface of the mold is formed. ) Is set to 10 to 200 μm .
According to the first aspect of the present invention, when the contents are used, if the body of the container is squeezed to apply internal pressure to the container, the check valve is elastically deformed along the axial direction of the communication hole by the internal pressure of the container, and the annular shape is formed. The valve portion is detached from the annular valve seat, the communication hole is opened, and the contents are discharged from the discharge passage to the outside through the communication hole. On the other hand, when the internal pressure to the container is released, the check valve is restored and the annular valve portion is seated on the annular valve seat, so that the communication hole is closed and the inside of the container can be quickly maintained in a sealed state. In addition, the inflow of air into the container can be suppressed.

特に、容器への内圧が解除されると、内圧解除による吸引力及び弾性力によって、逆止弁の環状弁部が環状弁座に向かって変位して着座するが、その着座した初期段階では、環状弁部と環状弁座との間に無数の隙間、つまり環状弁部と環状弁座とのいずれか一方または両方の接触面に設けた梨地状面による無数の隙間が現出される僅かな時間が得られる。この僅かな時間に、外部に吐出されなかった内容物の一部が、当該隙間から容器内に戻るようになる。その後次第に、内圧解除による吸引力及び環状弁部から環状弁座への押圧力により、環状弁部と環状弁座との間の隙間の開口面積が次第に減少すると共に、環状弁部と環状弁座とが互いに馴染むように限りなく近接して（ほぼ密着して）内容物の表面張力も作用することで、環状弁部と環状弁座との間の隙間が閉塞されるために、容器内を密封状態に維持することができる。   In particular, when the internal pressure to the container is released, the annular valve portion of the check valve is displaced toward the annular valve seat by the suction force and the elastic force due to the release of the internal pressure, and is seated. Innumerable gaps between the annular valve portion and the annular valve seat, that is, innumerable gaps due to the matte surface provided on one or both contact surfaces of the annular valve portion and the annular valve seat Time is gained. In this short time, a part of the content that has not been discharged to the outside returns to the inside of the container from the gap. Then, gradually, due to the suction force due to the release of the internal pressure and the pressing force from the annular valve portion to the annular valve seat, the opening area of the gap between the annular valve portion and the annular valve seat gradually decreases, and the annular valve portion and the annular valve seat are gradually reduced. The surface tension of the contents also acts as close as possible (approximately close to each other) so that they fit together, and the gap between the annular valve portion and the annular valve seat is closed. It can be kept sealed.

また、環状弁部と環状弁座とのいずれか一方または両方の接触面に梨地状面が形成されているので、環状弁部と環状弁座との間の内容物が乾燥固化した状態においても、内容物の使用時容器に内圧が付与された際、環状弁部の、環状弁座からの離脱が容易であり、逆止弁の応答性が良好となる。
さらに、内容物の使用後内圧が解除され、環状弁部が環状弁座に着座した初期段階では、環状弁部と環状弁座との間に無数の隙間が現出されるので、環状弁部と環状弁座との間の内容物が乾燥固化した状態であっても、外部に吐出されなかった内容物の一部を、内容物により閉鎖されていない一部の隙間を通じて内容物を容器内に戻すことができる。 In addition, since the matte surface is formed on one or both of the contact surfaces of the annular valve portion and the annular valve seat, even when the contents between the annular valve portion and the annular valve seat are dried and solidified. When an internal pressure is applied to the container when the contents are used, the annular valve portion is easily detached from the annular valve seat, and the responsiveness of the check valve is improved.
Furthermore, at the initial stage when the internal pressure is released after the use of the contents and the annular valve portion is seated on the annular valve seat, an infinite number of gaps appear between the annular valve portion and the annular valve seat. Even if the contents between the and the annular valve seat are dried and solidified, part of the contents that have not been discharged to the outside can be removed from the container through a part of the gap that is not closed by the contents. Can be returned to.

請求項２に記載した発明は、請求項１に記載した発明において、前記環状弁部と前記環状弁座との、いずれか一方または両方の接触面全域が梨地状面に形成されることを特徴とするものである。
請求項２の発明では、容器に内圧が付与された際の、逆止弁の応答性がさらに良くなる。
しかも、容器への内圧が解除され、環状弁部が環状弁座に着座した初期段階に、環状弁部と環状弁座との間の無数の隙間が周方向全域に亘って現出される。これにより、外部に吐出されなかった内容物の容器内への戻り速度を上げることができる。 The invention described in claim 2 is characterized in that, in the invention described in claim 1, the entire contact surface of one or both of the annular valve portion and the annular valve seat is formed in a matte surface. It is assumed that.
According to the second aspect of the invention, the responsiveness of the check valve when internal pressure is applied to the container is further improved.
In addition, in the initial stage in which the internal pressure on the container is released and the annular valve section is seated on the annular valve seat, countless gaps between the annular valve section and the annular valve seat appear over the entire circumferential area. Thereby, the return speed of the content that has not been discharged to the outside into the container can be increased.

請求項３に記載した発明は、請求項１または２に記載した発明において、前記逆止弁を成形する合成樹脂は、前記環状弁座を成形する合成樹脂よりも高弾性であることを特徴とするものである。
請求項３の発明では、容器への内圧が解除され、外部に吐出されなかった内容物の一部が、環状弁部と環状弁座との間の隙間から容器内に戻った後、内圧解除による吸引力及び環状弁部から環状弁座への押圧力により、速やかに、環状弁部と環状弁座とを互いに馴染むように限りなく近接させることができる。 According to a third aspect of the present invention, in the first or second aspect of the invention, the synthetic resin for forming the check valve has higher elasticity than the synthetic resin for forming the annular valve seat. Is what you do.
According to the third aspect of the present invention, the internal pressure to the container is released, and a part of the contents not discharged to the outside is returned to the container through the gap between the annular valve portion and the annular valve seat, and then the internal pressure is released. And the pressing force from the annular valve portion to the annular valve seat can quickly bring the annular valve portion and the annular valve seat as close as possible to each other so as to be adapted to each other.

本発明のキャップによれば、内容物の使用時には、逆止弁の応答性が良好であり、さらに内容物の使用後は、吐出されなかった内容物の一部を容器内に戻し、僅かな時間後に容器内を密封状態にすることができる。   According to the cap of the present invention, when the contents are used, the responsiveness of the check valve is good, and after the contents are used, a part of the contents that have not been discharged is returned to the container, and a slight amount is returned. After a time, the inside of the container can be sealed.

図１は、本発明の実施形態に係るキャップを示す断面図である。FIG. 1 is a sectional view showing a cap according to an embodiment of the present invention. 図２の（ａ）は、図１の、蓋体を含む主キャップ体の平面図であり、（ｂ）は、（ａ）の断面図であり、（ｃ）は、環状弁座の部位の拡大断面図である。2A is a plan view of the main cap body including the lid of FIG. 1, FIG. 2B is a cross-sectional view of FIG. 1A, and FIG. 2C is a sectional view of a portion of the annular valve seat. It is an expanded sectional view. 図３の（ａ）は、図１の、逆止弁の平面図であり、（ｂ）は、（ａ）の断面図であり、（ｃ）は下面図である。3A is a plan view of the check valve of FIG. 1, FIG. 3B is a sectional view of FIG. 3A, and FIG. 3C is a bottom view. 図４（ａ）は、図１の、案内筒状体の平面図であり、（ｂ）は、（ａ）の断面図である。FIG. 4A is a plan view of the guide tubular body of FIG. 1, and FIG. 4B is a cross-sectional view of FIG. 図５は、本キャップの作用を段階的に示した図である。FIG. 5 is a diagram showing the operation of the cap in a stepwise manner. 図６は、環状弁座の一部に設けた梨地状面の位置及び範囲を示す図である。FIG. 6 is a diagram showing the position and range of a matte surface provided on a part of the annular valve seat.

以下、本発明を実施するための形態を図１〜図６に基づいて詳細に説明する。
本発明の実施形態に係るキャップ１は、図１に示すように、容器２の容器口部３に嵌合され、内容物の連通孔２５を有するキャップ本体４と、該キャップ本体４に被冠する蓋体５とから構成される。キャップ本体４の一部を構成する主キャップ体１１に、蓋体５が一体的に接続される。本キャップ１は、図２に示す蓋体５を含む主キャップ体１１と、図３に示す逆止弁１２と、図４に示す案内筒状体１３との三つの構成部材を組み立てて構成される。なお、蓋体５を、ヒンジ６を介して主キャップ体１１に接続せずに、蓋体５を別体として構成してもよい。 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, a cap 1 according to an embodiment of the present invention is fitted into a container opening 3 of a container 2, and has a cap body 4 having a communication hole 25 for contents, and the cap body 4 is covered with a cap. And a lid 5 which is formed. The lid 5 is integrally connected to the main cap 11 forming a part of the cap body 4. The present cap 1 is constructed by assembling three constituent members of a main cap body 11 including a lid body 5 shown in FIG. 2, a check valve 12 shown in FIG. 3, and a guide tubular body 13 shown in FIG. You. The lid 5 may be configured as a separate body without connecting the lid 5 to the main cap body 11 via the hinge 6.

図１に示すように、容器２は、例えばチューブ容器など変形し易い容器であり、その内部には液状内容物や粘性を有する流動性内容物が充填される。この内容物は、例えば、醤油、オリーブオイル、ドレッシング、マヨネーズ、ケチャップ、とんかつ用ソース、ペースト状マスタード等が挙げられる。容器２は、その胴部２ａを圧搾するなどして内圧を加えることで内容物を吐出させるタイプのものである。容器口部３は、円筒状に形成される。該容器口部３の下部外壁面には嵌合突条部１５が形成される。容器口部３の上部には、周壁部全体が内方に凹む嵌合凹条部１６が形成される。なお、本キャップ１は、外容器と内容器とからなる二重容器（剥離容器と言われるものも含む）にも採用することができ、外容器の容器口部３に装着される。内容器は、その内部に内容物が充填されると共に内容物の減少に伴いしぼみ変形する可撓性を有するものである。内容器の減容形状を保持するために外容器と内容器との間には外気が吸入されるように、外容器に吸入弁が取り付けられる。   As shown in FIG. 1, the container 2 is a container that is easily deformed, such as a tube container, and is filled with a liquid content or a viscous fluid content. The contents include, for example, soy sauce, olive oil, dressing, mayonnaise, ketchup, tonkatsu sauce, paste mustard, and the like. The container 2 is of a type that discharges contents by applying internal pressure, for example, by squeezing the body 2a. The container opening 3 is formed in a cylindrical shape. A fitting ridge 15 is formed on a lower outer wall surface of the container opening 3. In the upper part of the container mouth part 3, a fitting recess 16 is formed in which the entire peripheral wall part is depressed inward. Note that the present cap 1 can also be employed in a double container (including a so-called peeling container) including an outer container and an inner container, and is attached to the container opening 3 of the outer container. The inner container has the flexibility of being filled with contents and deflecting and deforming as the contents decrease. In order to maintain the reduced volume shape of the inner container, a suction valve is attached to the outer container so that outside air is sucked between the outer container and the inner container.

図１に示すように、キャップ本体４は、容器２内の内容物を吐出する吐出通路４１を有する案内筒状体１３と、吐出通路４１と容器口部３とを連通する連通孔２５及び該連通孔２５周辺に設けられた環状弁座２６を有する主キャップ体１１と、連通孔２５の軸線方向に沿って弾性変形して、弁本体３６の環状弁部２９が環状弁座２６から離脱または着座して連通孔２５を開閉する逆止弁１２と、から構成される。逆止弁１２を成形する合成樹脂は、蓋体５を含む主キャップ体１１を成形する合成樹脂よりも高弾性となる。具体的には、蓋体５を含む主キャップ体１１及び案内筒状体１３は、ポリプロピレンやポリエチレン等の樹脂にて成形される。また、逆止弁１２は柔軟で高弾性の低密度ポリエチレンやエラストマー及びこれらの混合樹脂にて成形される。   As shown in FIG. 1, the cap body 4 includes a guide cylindrical body 13 having a discharge passage 41 for discharging the contents in the container 2, a communication hole 25 for communicating the discharge passage 41 with the container mouth 3, and The main cap body 11 having the annular valve seat 26 provided in the vicinity of the communication hole 25, and elastic deformation along the axial direction of the communication hole 25 causes the annular valve portion 29 of the valve body 36 to be detached from the annular valve seat 26 or A check valve 12 which is seated to open and close the communication hole 25. The synthetic resin that forms the check valve 12 has higher elasticity than the synthetic resin that forms the main cap body 11 including the lid 5. Specifically, the main cap body 11 including the lid 5 and the guide cylindrical body 13 are formed of a resin such as polypropylene or polyethylene. The check valve 12 is formed of a flexible, high-elasticity low-density polyethylene or elastomer, or a resin mixture thereof.

図１及び図２に示すように、主キャップ体１１は、容器口部３に嵌合される円筒状外側壁部１８と、該円筒状外側壁部１８の内側に同心状に設けられる円筒状内側壁部１９と、円筒状外側壁部１８の上端と円筒状内側壁部１９の上端とを接続する環状水平壁部２０と、を備えている。これら円筒状内側壁部１９と円筒状外側壁部１８との間に環状空間２２が形成される。円筒状内側壁部１９の上部内壁面には、周方向に沿って環状に延びる環状嵌合凹部２３が形成される。   As shown in FIGS. 1 and 2, the main cap body 11 has a cylindrical outer wall 18 fitted into the container mouth 3 and a cylindrical outer wall 18 provided concentrically inside the cylindrical outer wall 18. It has an inner wall portion 19 and an annular horizontal wall portion 20 connecting the upper end of the cylindrical outer wall portion 18 and the upper end of the cylindrical inner wall portion 19. An annular space 22 is formed between the cylindrical inner wall 19 and the cylindrical outer wall 18. An annular fitting recess 23 extending annularly along the circumferential direction is formed on the upper inner wall surface of the cylindrical inner wall portion 19.

円筒状内側壁部１９の下部内壁面には、その周方向全域から一体的に環状壁部１０が径方向中心に向かって斜め上方に延びている。すなわち環状壁部１０は、円筒状内側壁部１９の下部内壁面から一体的に截頭円錐状で延びている。環状壁部１０と円筒状内側壁部１９の内壁面とにより上方を開放した空間２４が形成される。環状壁部１０の径方向中心部に略円形状の連通孔２５が開口される。該連通孔２５は容器口部３内と連通される。該連通孔２５はφ５．０ｍｍ〜φ１２．０ｍｍの範囲で形成される。該連通孔２５の周辺、詳しくは連通孔２５の内壁面の全域が環状弁座２６として作用する。該環状弁座２６は倒立円錐状面（上方に拡径した環状テーパ面やすり鉢状面）にて形成される。   On the lower inner wall surface of the cylindrical inner wall portion 19, the annular wall portion 10 extends obliquely upward toward the center in the radial direction integrally from the entire circumferential direction. That is, the annular wall portion 10 integrally extends from the lower inner wall surface of the cylindrical inner wall portion 19 in a truncated cone shape. The annular wall 10 and the inner wall of the cylindrical inner wall 19 form a space 24 that is open upward. A substantially circular communication hole 25 is opened at the radial center of the annular wall 10. The communication hole 25 communicates with the inside of the container opening 3. The communication hole 25 is formed in a range of φ5.0 mm to φ12.0 mm. The periphery of the communication hole 25, specifically, the entire inner wall surface of the communication hole 25 functions as an annular valve seat 26. The annular valve seat 26 is formed as an inverted conical surface (an annular tapered surface or a mortar-shaped surface whose diameter is increased upward).

図２（ａ）に示すように、環状弁座２６の全域、すなわち環状弁座２６の、環状弁部２９との接触面全域は、梨地状面（凹凸部２７ｂ、２７ａ）に形成されている。この梨地状面は、例えば、金型の表面に放電加工により設けた凹凸形状により、成型品の表面を梨地状面に成型する加工により形成される。なお、金型の表面に設けた粗度（Ｒｚ）は１０〜２００μｍに設定される。この梨地状面の各凸部２７ａは、例えば、図２（ｃ）に示すように、各凹部２７ｂの底面からなだらかに***して、頂面が曲率半径の大きい球面状に形成される。   As shown in FIG. 2A, the entire area of the annular valve seat 26, that is, the entire area of the contact surface of the annular valve seat 26 with the annular valve portion 29 is formed in a matte surface (the uneven portions 27 b and 27 a). . This matte surface is formed by, for example, forming the surface of a molded product into a matte surface by using an uneven shape provided by electric discharge machining on the surface of a mold. The roughness (Rz) provided on the surface of the mold is set to 10 to 200 μm. For example, as shown in FIG. 2 (c), each convex portion 27a of the matte surface smoothly rises from the bottom surface of each concave portion 27b, and the top surface is formed into a spherical shape having a large radius of curvature.

図１及び図２に示すように、環状水平壁部２０の外径は円筒状外側壁部１８の外径より小径で、その外壁面に周方向に沿って環状に延びる突条係止部３１が形成される。該環状水平壁部２０の外壁面に蓋体５が嵌合される。環状水平壁部２０の下面には、円筒状外側壁部１８の内側に、容器口部３の上端が嵌合される円筒状嵌合部３２が垂設される。円筒状嵌合部３２は、円筒状外側壁部１８と同心状に垂設される。   As shown in FIGS. 1 and 2, the outer diameter of the annular horizontal wall portion 20 is smaller than the outer diameter of the cylindrical outer wall portion 18, and the ridge locking portion 31 extending annularly along the circumferential direction on the outer wall surface. Is formed. The lid 5 is fitted to the outer wall surface of the annular horizontal wall portion 20. On the lower surface of the annular horizontal wall portion 20, a cylindrical fitting portion 32 into which the upper end of the container mouth portion 3 is fitted is vertically provided inside the cylindrical outer wall portion 18. The cylindrical fitting portion 32 is vertically provided concentrically with the cylindrical outer wall portion 18.

図１及び図３に示すように、逆止弁１２は、主キャップ体１１の円筒状内側壁部１９の内壁面に当接する円筒状支持部３４と、該円筒状支持部３４の内壁面から一体的に径方向中心に向かって延びる複数の弾性片３５と、各弾性片３５の先端部に一体的に接続され、連通孔２５を開閉する弁本体３６と、各弾性片３５の間に設けられ、連通孔２５からの内容物が流通する複数の流通孔３７と、から構成される。   As shown in FIGS. 1 and 3, the check valve 12 includes a cylindrical support portion 34 in contact with the inner wall surface of the cylindrical inner wall portion 19 of the main cap body 11, and an inner wall surface of the cylindrical support portion 34. A plurality of elastic pieces 35 extending integrally toward the center in the radial direction, a valve body 36 integrally connected to the distal end of each elastic piece 35 to open and close the communication hole 25, and provided between each elastic piece 35. And a plurality of flow holes 37 through which the contents from the communication holes 25 flow.

各弾性片３５は、円筒状支持部３４の上部内壁面から径方向中心に向かって、且つ斜め下方にやや湾曲して延びている。本実施形態では、弾性片３５は、周方向に９０°ピッチで４箇所形成され、各弾性片３５間に流通孔３７が９０°ピッチで４箇所形成される。また、各弾性片３５の先端部は弁本体３６の外壁面の上縁に一体的に接続される。弁本体３６は、ドーム状を呈している。弁本体３６の外壁面の全域が、環状弁座２６（倒立円錐状面）に着座するように倒立円錐状面（上方に拡径した環状テーパ面やすり鉢状面）に形成される。該弁本体３６の外壁面が環状弁部２９として作用する。該弁本体３６の上面には球状凸部３８が突設される。   Each elastic piece 35 extends from the upper inner wall surface of the cylindrical support part 34 toward the center in the radial direction and slightly obliquely downward. In the present embodiment, four elastic pieces 35 are formed at 90 ° pitch in the circumferential direction, and four flow holes 37 are formed between each elastic piece 35 at 90 ° pitch. The distal end of each elastic piece 35 is integrally connected to the upper edge of the outer wall surface of the valve body 36. The valve body 36 has a dome shape. The entire outer wall surface of the valve body 36 is formed on an inverted conical surface (an annular tapered surface or a mortar-shaped surface whose diameter is increased upward) so as to be seated on the annular valve seat 26 (an inverted conical surface). The outer wall surface of the valve body 36 functions as the annular valve portion 29. On the upper surface of the valve body 36, a spherical convex portion 38 is protruded.

図１及び図４に示すように、案内筒状体１３は、逆止弁１２の上方に配置される。該案内筒状体１３は、主キャップ体１１の円筒状内側壁部１９と嵌合するように下方に延びる円筒状支持部４０と、円筒状支持部４０の径方向中央部から上方に延び、内部に吐出通路４１を有する円筒状案内部４２と、円筒状支持部４０の上端と円筒状案内部４２の下端とを一体的に接続する環状閉鎖壁部４３と、から構成される。円筒状案内部４２の吐出通路４１が、主キャップ体１１の連通孔２５に連通される。環状閉鎖壁部４３には、円筒状支持部４０よりも径方向外方に突設される環状鍔部４３ａが形成される。円筒状支持部４０は、逆止弁１２を構成する円筒状支持部３４の上方に配置され、円筒状支持部４０の周壁部の厚みと、逆止弁１２の円筒状支持部３４の周壁部の厚みとは略同一である。円筒状支持部４０の外壁面には、周方向に延びる環状突条部４４が突設される。   As shown in FIGS. 1 and 4, the guide tubular body 13 is disposed above the check valve 12. The guide cylindrical body 13 extends downward from a radially central portion of the cylindrical support portion 40 and extends downward so as to fit with the cylindrical inner wall portion 19 of the main cap body 11, It comprises a cylindrical guide portion 42 having a discharge passage 41 therein, and an annular closing wall portion 43 integrally connecting the upper end of the cylindrical support portion 40 and the lower end of the cylindrical guide portion 42. The discharge passage 41 of the cylindrical guide portion 42 communicates with the communication hole 25 of the main cap body 11. The annular closing wall 43 is formed with an annular flange 43 a protruding radially outward from the cylindrical support 40. The cylindrical support portion 40 is disposed above the cylindrical support portion 34 constituting the check valve 12, and has a thickness of a peripheral wall portion of the cylindrical support portion 40 and a peripheral wall portion of the cylindrical support portion 34 of the check valve 12. Is substantially the same as On the outer wall surface of the cylindrical support portion 40, an annular ridge portion 44 protruding in the circumferential direction is provided.

図１及び図２に示すように、蓋体５は、主キャップ体１１の円筒状外側壁部１８にヒンジ６を介して一体的に接続されている。該蓋体５は、ヒンジ６を介して主キャップ体１１の円筒状外側壁部１８の外壁面に接続される円筒状の胴部５０と、該胴部５０の上端の周方向全域に一体的に接続される天面部５１とから構成される。胴部５０の内側には、天面部５１から、案内筒状体１３の抜脱を規制する円筒状規制部５５が垂設される。該円筒状規制部５５は胴部５０と同心状に垂設される。天面部５１の径方向中央部には、案内筒状体１３の円筒状案内部４２内の吐出通路４１に緊密に嵌合する円筒状密着部５２が垂設される。胴部５０の下部内壁面には、周方向に環状に延びる突条係止部５３が形成される。胴部５０の外壁面の下部で、ヒンジ６側と反対側には、使用者が把持する把持部５４が周方向に沿う所定範囲で外方に向かって突設される。   As shown in FIGS. 1 and 2, the lid 5 is integrally connected to the cylindrical outer wall 18 of the main cap body 11 via the hinge 6. The lid 5 has a cylindrical body 50 connected to the outer wall surface of the cylindrical outer wall 18 of the main cap body 11 via the hinge 6, and is integrally formed in the entire circumferential direction of the upper end of the body 50. And a top surface portion 51 connected to the main surface. A cylindrical restricting portion 55 that restricts withdrawal of the guide cylindrical body 13 from the top surface portion 51 is vertically provided inside the body portion 50. The cylindrical restricting portion 55 is vertically provided concentrically with the body 50. At the center in the radial direction of the top surface portion 51, a cylindrical contact portion 52 that fits tightly into the discharge passage 41 in the cylindrical guide portion 42 of the guide tubular body 13 is vertically provided. On the lower inner wall surface of the body portion 50, a ridge locking portion 53 extending annularly in the circumferential direction is formed. On the lower side of the outer wall surface of the body portion 50 and on the side opposite to the hinge 6 side, a grip portion 54 gripped by the user is provided so as to protrude outward in a predetermined range along the circumferential direction.

次に、本キャップ１を組み立て、容器口部３に装着する方法を説明する。
まず、主キャップ体１１の環状壁部１０の上面に、逆止弁１２を上方から組み込む。詳しくは、逆止弁１２の円筒状支持部３４の外壁面が主キャップ体１１の円筒状内側壁部１９の内壁面に沿うようにして、逆止弁１２を環状壁部１０の上面に配置する。すなわち、逆止弁１２を、上方から環状壁部１０と円筒状内側壁部１９の内壁面とで囲まれた上方を開放した空間２４内に組み込む。 Next, a method of assembling the present cap 1 and attaching it to the container mouth 3 will be described.
First, the check valve 12 is installed on the upper surface of the annular wall portion 10 of the main cap body 11 from above. Specifically, the check valve 12 is arranged on the upper surface of the annular wall portion 10 such that the outer wall surface of the cylindrical support portion 34 of the check valve 12 is along the inner wall surface of the cylindrical inner wall portion 19 of the main cap body 11. I do. That is, the check valve 12 is incorporated into a space 24 that is open from the upper side and is surrounded by the annular wall portion 10 and the inner wall surface of the cylindrical inner wall portion 19.

次に、案内筒状体１３を、その円筒状支持部４０の外壁面が主キャップ体１１の円筒状内側壁部１９の内壁面に沿うように、逆止弁１２を上方から押し込むようにして組み込み、案内筒状体１３の円筒状支持部４０の外壁面に設けた環状突条部４４を主キャップ体１１の円筒状内側壁部１９の内壁面に設けた環状嵌合凹部２３に嵌合すると共に、案内筒状体１３の環状鍔部４３ａを環状水平壁部２０の上面に当接させて組み付ける。この結果、逆止弁１２の弁本体３６の環状弁部２９全域（倒立円錐状面全域）が、主キャップ１１の梨地状面に形成された環状弁座２６全域（倒立円錐状面全域）に接触して、且つ環状弁部２９の下端縁と環状弁座２６の下端縁とが一致するようになる。また、逆止弁１２の弁本体３６は、組み込み前の位置よりも上方に位置するために、湾曲した各弾性片３５の下向きの付勢力（復元力）により、弁本体３６の環状弁部２９が、環状壁部１０の環状弁座２６を押圧するようになる。また、逆止弁１２の弁本体３６（連通孔２５）の直上に、案内筒状体１３の円筒状案内部４２が位置する。これにより、キャップ本体４の組み立てが完了する。   Next, the check tubular member 13 is pushed into the check valve 12 from above so that the outer wall surface of the cylindrical support portion 40 is along the inner wall surface of the cylindrical inner wall portion 19 of the main cap body 11. The annular ridge 44 provided on the outer wall surface of the cylindrical support portion 40 of the guide cylindrical body 13 is fitted into the annular fitting recess 23 provided on the inner wall surface of the cylindrical inner wall portion 19 of the main cap body 11. At the same time, the annular flange 43a of the guide tubular body 13 is assembled by bringing the annular flange 43a into contact with the upper surface of the annular horizontal wall 20. As a result, the entire annular valve portion 29 (the entire inverted conical surface) of the valve body 36 of the check valve 12 becomes the entire annular valve seat 26 (the entire inverted conical surface) formed on the matte surface of the main cap 11. The lower edge of the annular valve portion 29 and the lower edge of the annular valve seat 26 are brought into contact with each other. Further, since the valve body 36 of the check valve 12 is located above the position before assembly, the downward biasing force (restoring force) of each of the curved elastic pieces 35 causes the annular valve portion 29 of the valve body 36 to return. Presses the annular valve seat 26 of the annular wall portion 10. Further, the cylindrical guide portion 42 of the guide tubular body 13 is located immediately above the valve body 36 (communication hole 25) of the check valve 12. Thus, the assembly of the cap body 4 is completed.

次に、キャップ本体４に蓋体５を被冠する際には、ヒンジ６を折り曲げて蓋体５をキャップ本体４の上方から覆うように被せる。すると、蓋体５の胴部５０に設けた突条係止部５３が、主キャップ体１１の環状水平壁部２０に設けた突条係止部３１を乗り越えるように係合する。これと同時に、蓋体５の天面部５１に設けた円筒状密着部５２が、案内筒状体１３の円筒状案内部４２内の吐出通路４１に緊密に嵌合され、蓋体５の天面部５１に設けた円筒状規制部５５が、案内筒状体１３の円筒状支持部４０の直上に近接して位置するようになる。これにより、キャップ１の組み立てが完了する。   Next, when the cover 5 is covered with the cap body 4, the hinge 6 is bent so as to cover the cover 5 from above the cap body 4. Then, the ridge locking portion 53 provided on the body 50 of the lid 5 is engaged so as to get over the ridge locking portion 31 provided on the annular horizontal wall portion 20 of the main cap body 11. At the same time, the cylindrical contact portion 52 provided on the top surface portion 51 of the lid 5 is tightly fitted into the discharge passage 41 in the cylindrical guide portion 42 of the guide cylindrical body 13, and the top surface portion of the lid 5 is The cylindrical restricting portion 55 provided on the 51 is located immediately above the cylindrical support portion 40 of the guide cylindrical body 13 and in close proximity. Thereby, the assembly of the cap 1 is completed.

次に、キャップ１を容器口部３に装着する際には、容器口部３の嵌合凹条部１６及び嵌合突条部１５を、主キャップ体１１の円筒状内側壁部１９と円筒状外側壁部１８との間の環状空間２２内に挿入して、容器口部３の上端外壁面を主キャップ体１の環状規制部３２の内面に密着するようにして、キャップ１を容器口部３に嵌合する。なお、本実施形態では、キャップ１を容器口部３へ打栓方式で装着する方法を説明したが、他の装着方法例えば螺合方式により装着してもよい。   Next, when the cap 1 is attached to the container mouth 3, the fitting concave ridge 16 and the fitting ridge 15 of the container mouth 3 are connected to the cylindrical inner wall 19 of the main cap body 11 by a cylinder. The cap 1 is inserted into the annular space 22 between the outer wall 18 and the upper end outer wall of the container opening 3 so as to be in close contact with the inner surface of the annular regulating portion 32 of the main cap body 1. It fits in the part 3. In the present embodiment, the method of attaching the cap 1 to the container mouth 3 by the stopper method has been described. However, the cap 1 may be attached by another attaching method, for example, the screwing method.

次に、本発明の実施形態に係るキャップ１の作用を、図５に基づいて、図１及び図２も適宜参照して説明する。
内容物を使用する際には、まず、図５（ａ）に示すように、蓋体５を開いて、キャップ本体４の案内筒状体１３を外部に露出させる。
次に、図５（ｂ）に示すように、使用者が、案内筒状体１３の吐出通路４１が下方を向くように容器２を傾けて吐出姿勢にした状態で、容器２の胴部２ａを圧搾して容器２に内圧を加える。すると、容器２の内圧が逆止弁１２の弁本体３６の下壁面全域に作用することで、逆止弁１２が、その各弾性片３５が屈曲しつつ連通孔２５の軸線方向に沿って弾性変形することで、弁本体３６の環状弁部２９（倒立円錐状面）が、連通孔２５周辺の環状弁座２６（倒立円錐状面）から離脱される。この結果、連通孔２５が開放されて、適量の内容物が、容器口部３内から環状壁部１０の下壁面に沿って連通孔２５に集まり、該連通孔２５から、逆止弁１２の各流通孔３７を経由して案内筒状体１３の円筒状案内部４２の吐出通路４１に至り外部に吐出される。 Next, the operation of the cap 1 according to the embodiment of the present invention will be described based on FIG. 5 and appropriately referring to FIGS.
When using the contents, first, as shown in FIG. 5A, the lid 5 is opened to expose the guide cylindrical body 13 of the cap body 4 to the outside.
Next, as shown in FIG. 5B, the user tilts the container 2 so that the discharge passage 41 of the guide tubular body 13 faces downward, and sets the body 2a of the container 2 in the discharge posture. To apply internal pressure to the container 2. Then, the internal pressure of the container 2 acts on the entire lower wall surface of the valve body 36 of the check valve 12, so that the check pieces 12 elastically move along the axial direction of the communication hole 25 while the respective elastic pieces 35 are bent. Due to the deformation, the annular valve portion 29 (inverted conical surface) of the valve body 36 is detached from the annular valve seat 26 (inverted conical surface) around the communication hole 25. As a result, the communication hole 25 is opened, and an appropriate amount of contents is collected from the inside of the container mouth 3 along the lower wall surface of the annular wall portion 10 into the communication hole 25, and from the communication hole 25, the check valve 12 is closed. Through each of the flow holes 37, the fluid is discharged to the outside through the discharge passage 41 of the cylindrical guide portion 42 of the guide cylindrical body 13.

その後、内容物を適量吐出した後容器２の胴部２ａへの圧搾を止めて、図５（ｃ）に示すように、容器２を正立姿勢に戻そうとするとき、容器２への内圧が解除されているために、内圧解除による吸引力及び弾性力によって、逆止弁１２の各弾性片３５が復元し、弁本体３６の環状弁部２９（倒立円錐状面）が環状弁座２６（倒立円錐状面）に着座して、弁本体３６により連通孔２５が閉塞される。   Then, after discharging the proper amount of the contents, the pressing of the container 2 to the body 2a is stopped, and when the container 2 is to be returned to the upright posture as shown in FIG. Is released, each elastic piece 35 of the check valve 12 is restored by the suction force and the elastic force due to the release of the internal pressure, and the annular valve portion 29 (inverted conical surface) of the valve body 36 is closed by the annular valve seat 26. The communication hole 25 is closed by the valve body 36 while sitting on the (inverted conical surface).

この時、図５（ｃ）から解るように、容器２への内圧が解除され、逆止弁１２の環状弁部２９が環状弁座２６に着座した初期段階では、環状弁部２９と環状弁座２６との間に無数の隙間、すなわち環状弁部２９の表面と環状弁座２６に形成した梨地状面（凹凸部２７ａ、２７ｂ）との間に無数の隙間が現出された僅かな時間が得られる。この僅かな時間に、外部に吐出されず、環状壁部１０上の空間２４から吐出通路４１内に至る範囲に残存した内容物の一部が、環状弁部２９と環状弁座２６との間の無数の隙間から容器２内に戻るようになる。   At this time, as can be seen from FIG. 5C, in the initial stage when the internal pressure to the container 2 is released and the annular valve portion 29 of the check valve 12 is seated on the annular valve seat 26, the annular valve portion 29 and the annular valve An infinite number of gaps between the seat 26 and the infinite number of gaps between the surface of the annular valve portion 29 and the matte surface (the uneven portions 27a and 27b) formed in the annular valve seat 26 are short time. Is obtained. During this short time, a part of the contents that are not discharged to the outside and remain in the range from the space 24 on the annular wall portion 10 to the inside of the discharge passage 41 are moved between the annular valve portion 29 and the annular valve seat 26. Return to the inside of the container 2 from the innumerable gaps.

その後次第に、内圧解除による吸引力及び環状弁部２９から環状弁座２６への押圧力により、環状弁部２９と環状弁座２６との間の隙間の開口面積が次第に減少すると共に、環状弁部２９の表面が、環状弁座２６の凸部２７ａの頂面から凹部２７ｂの底面に沿って馴染むように限りなく近接して（ほぼ密着して）内容物の表面張力も作用することから、環状弁部２９と環状弁座２６との間の隙間が閉塞されて、容器２内を密封状態に維持することができる。
このように、使用直後、使用者が手でキャップ１を操作することなく、吐出されなかったキャップ本体４内の内容物の一部を容器２内に戻して、案内筒状体１３の吐出通路４１への内容物の残存を抑制する（図５（ｄ）参照）ことができ、その後は容器２内を速やかに密封して、空気の容器２内への流入を抑制することができる。 Then, gradually, due to the suction force due to the release of the internal pressure and the pressing force from the annular valve portion 29 to the annular valve seat 26, the opening area of the gap between the annular valve portion 29 and the annular valve seat 26 gradually decreases, and the annular valve portion The surface tension of the contents also acts as close as possible (substantially in close contact) from the top surface of the convex portion 27a of the annular valve seat 26 along the bottom surface of the concave portion 27b. The gap between the valve portion 29 and the annular valve seat 26 is closed, and the inside of the container 2 can be maintained in a sealed state.
In this way, immediately after use, a part of the contents in the cap body 4 which has not been discharged is returned to the container 2 without the user operating the cap 1 by hand, and the discharge passage of the guide tubular body 13 is formed. The remaining of the contents in the container 41 can be suppressed (see FIG. 5D). Thereafter, the inside of the container 2 can be quickly sealed, and the inflow of air into the container 2 can be suppressed.

次に、図５（ｄ）に示すように、ヒンジ６を折り曲げて蓋体５を、キャップ本体４の上方から覆うように被せれば、蓋体５の胴部５０に設けた突条係止部５３が、主キャップ体１１の環状水平壁部２０に設けた突条係止部３１を乗り越えるように係合すると共に、蓋体５の天面部５１に設けた円筒状密着部５２が、案内筒状体１３の円筒状案内部４２内の吐出通路４１に緊密に嵌合される。
そして、蓋体５をキャップ本体４に被冠することで、キャップ本体４内（環状壁部１０上の空間２４から案内筒状体１３の吐出通路４１に至る範囲）への異物の混入を抑制すると共に、容器２内を二重で密封することができる。しかも、キャップ本体４内は蓋体５により密封されているので、環状壁部１０上の空間２４に残存した内容物の酸化を抑制することができる。 Next, as shown in FIG. 5 (d), if the hinge 6 is bent to cover the lid 5 so as to cover the cap body 4 from above, the ridge locking provided on the body 50 of the lid 5 is achieved. The portion 53 engages so as to get over the ridge locking portion 31 provided on the annular horizontal wall portion 20 of the main cap body 11, and the cylindrical close contact portion 52 provided on the top surface portion 51 of the lid 5 guides The cylinder 13 is tightly fitted to the discharge passage 41 in the cylindrical guide portion 42.
By covering the cap 5 with the cap body 4, the entry of foreign matter into the cap body 4 (a range from the space 24 on the annular wall portion 10 to the discharge passage 41 of the guide tubular body 13) is suppressed. At the same time, the inside of the container 2 can be double-sealed. In addition, since the inside of the cap body 4 is sealed by the lid 5, the oxidation of the contents remaining in the space 24 on the annular wall 10 can be suppressed.

以上説明したように、本発明の実施形態に係るキャップ１では、キャップ本体４は、容器２内の内容物を吐出する吐出通路４１と、該吐出通路４１と容器口部３とを連通する連通孔２５と、該連通孔２５周辺に設けられた環状弁座２６と、連通孔２５の軸線方向に沿って弾性変形して、環状弁部２９が環状弁座２６に着座または離脱することで、連通孔２５を開閉する逆止弁１２と、を備え、環状弁座２６の、環状弁部２９との接触面全域は、梨地状面に形成されている。   As described above, in the cap 1 according to the embodiment of the present invention, the cap body 4 includes the discharge passage 41 that discharges the contents in the container 2 and the communication that connects the discharge passage 41 and the container opening 3. The hole 25, an annular valve seat 26 provided around the communication hole 25, and the annular valve portion 29 is elastically deformed along the axial direction of the communication hole 25, and the annular valve portion 29 is seated on or separated from the annular valve seat 26. A check valve 12 for opening and closing the communication hole 25, and the entire contact surface of the annular valve seat 26 with the annular valve portion 29 is formed in a matte surface.

そして、特に、容器２への内圧が解除され、逆止弁１２の環状弁部２９が環状弁座２６に着座した初期段階では、環状弁部２９と環状弁座２６との間に無数の隙間、すなわち環状弁部２９の表面と環状弁座２６に形成した梨地状面（凹凸部２７ａ、２７ｂ）との間に無数の隙間が現出された僅かな時間に、外部に吐出されなかった内容物の一部が、当該隙間から容器２内に戻るようになる。その後次第に、環状弁部２９の表面が、環状弁座２６の凸部２７ａの頂面から凹部２７ｂの底面に沿って馴染むように限りなく近接して（ほぼ密着して）内容物の表面張力も作用することから、環状弁部２９と環状弁座２６との間の隙間が閉塞されるために、容器２内を密封状態に維持することができる。   In particular, in the initial stage when the internal pressure to the container 2 is released and the annular valve portion 29 of the check valve 12 is seated on the annular valve seat 26, the countless gaps between the annular valve portion 29 and the annular valve seat 26 are provided. That is, the contents that were not discharged to the outside in a short time when an infinite number of gaps appeared between the surface of the annular valve portion 29 and the matte surface (the uneven portions 27a and 27b) formed in the annular valve seat 26. Part of the object comes back into the container 2 from the gap. Then, gradually, the surface tension of the annular valve portion 29 becomes as close as possible (substantially in close contact) so that the surface of the annular valve portion 29 is adapted from the top surface of the convex portion 27a of the annular valve seat 26 along the bottom surface of the concave portion 27b. Since it acts, the gap between the annular valve portion 29 and the annular valve seat 26 is closed, so that the inside of the container 2 can be maintained in a sealed state.

その結果、使用時、吐出されなかった内容物の一部を容器２内に戻すことにより、案内筒状体１３の吐出通路４１への内容物の残存を抑制できるので、蓋体５をキャップ本体４上に被冠して、蓋体５の円筒状密着部５２を吐出通路４１に嵌合する際の内容物の飛散を防ぐことができ、蓋体５の円筒状密着部５２への内容物の付着も防ぐことができる。このように、本キャップ１は、内容物の使用後、使用者が手で操作することなく、吐出されなかった内容物の一部を容器内に戻しつつ、吐出通路４１内への内容物の残存を抑制して、速やかに容器２内を密封状態にすることができるものである。   As a result, at the time of use, by returning a part of the content that has not been discharged into the container 2, it is possible to prevent the content from remaining in the discharge passage 41 of the guide tubular body 13, and thus the lid 5 is attached to the cap body. 4, the contents can be prevented from scattering when the cylindrical contact portion 52 of the lid 5 is fitted into the discharge passage 41, and the contents of the cylindrical contact portion 52 of the lid 5 can be prevented. Can be prevented from adhering. In this manner, after the contents are used, the present cap 1 allows the contents to be discharged into the discharge passage 41 while returning a part of the contents not discharged into the container without manual operation by the user. It is possible to suppress the residual and quickly bring the inside of the container 2 into a sealed state.

また、本発明の実施形態に係るキャップ１では、環状弁座２６の、環状弁部２９との接触面全域が梨地状面に形成されているので、蓋体５を閉め忘れ、環状弁部２９と環状弁座２６との間の内容物が乾燥固化した状態であっても、内容物の使用時、環状弁部２９が環状弁座２６から容易に離脱でき、逆止弁１２の応答性が良く、吐出不良を防ぐことができる。   In addition, in the cap 1 according to the embodiment of the present invention, since the entire contact surface of the annular valve seat 26 with the annular valve portion 29 is formed in a matte surface, the lid 5 is forgotten to be closed, and the annular valve portion 29 is forgotten. Even when the contents between the annular valve seat 26 and the annular valve seat 26 are dried and solidified, the annular valve portion 29 can easily be detached from the annular valve seat 26 when the contents are used, and the responsiveness of the check valve 12 is reduced. Good ejection can be prevented.

さらに、本発明の実施形態に係るキャップ１では、環状弁座２６の、環状弁部２９との接触面全域が梨地状面に形成され、内容物の使用後、環状弁部２９が環状弁座２６に着座した初期段階では、環状弁部２９と環状弁座２６との間に無数の隙間が現出されるので、環状弁部２９と環状弁座２６との間の内容物が乾燥固化した状態であっても、外部に吐出されなかった内容物の一部を、内容物により閉鎖されていない一部の隙間を通じて容器２内に戻すことができる。   Furthermore, in the cap 1 according to the embodiment of the present invention, the entire contact surface of the annular valve seat 26 with the annular valve portion 29 is formed in a matte surface, and after the contents are used, the annular valve portion 29 becomes the annular valve seat. In the initial stage of sitting on the seat 26, an infinite number of gaps appear between the annular valve portion 29 and the annular valve seat 26, so that the contents between the annular valve portion 29 and the annular valve seat 26 are dried and solidified. Even in the state, a part of the content that has not been discharged to the outside can be returned into the container 2 through a part of the gap that is not closed by the content.

さらにまた、本発明の実施形態に係るキャップ１では、内容物の使用後、環状弁部２９が環状弁座２６に着座した初期段階では、環状弁部２９と環状弁座２６との間の無数の隙間が周方向全域に亘って現出される。その結果、外部に吐出されなかった内容物が、周方向全域に亘って現出された無数の隙間から容器２内に戻るようになる（図５（ｃ）参照）ので、外部に吐出されなかった内容物の容器２内への戻り速度を上げることができ、ひいては、単位時間当たりの戻り量を増加させることができる。   Furthermore, in the cap 1 according to the embodiment of the present invention, in the initial stage in which the annular valve portion 29 is seated on the annular valve seat 26 after use of the contents, the countless number of the annular valve portions 29 and the annular valve seat 26 are located. Appears over the entire circumferential direction. As a result, the contents that have not been discharged to the outside return to the inside of the container 2 from the myriad of gaps that have appeared over the entire area in the circumferential direction (see FIG. 5C), and are not discharged to the outside. It is possible to increase the speed of returning the contents into the container 2 and, consequently, to increase the amount of return per unit time.

さらにまた、本発明の実施形態に係るキャップ１では、逆止弁１２を成形する合成樹脂が、蓋体５を含む主キャップ体１１を成形する合成樹脂よりも高弾性、つまり環状弁部２９が環状弁座２６より高弾性であるので、容器２の内圧が解除され、吐出されなかった内容物の一部が容器２内に戻った後、内圧解除による吸引力及び環状弁部２９から環状弁座２６への押圧力により、速やかに、環状弁部２９の表面を、環状弁座２６の凸部２７ａの頂面から凹部２７ｂの底面に沿って馴染むように限りなく近接させる（ほぼ密着させる）ことができる。   Furthermore, in the cap 1 according to the embodiment of the present invention, the synthetic resin that forms the check valve 12 has higher elasticity than the synthetic resin that forms the main cap body 11 including the lid 5, that is, the annular valve portion 29 Since the internal pressure of the container 2 is released because the elasticity is higher than that of the annular valve seat 26 and a part of the content that has not been discharged returns to the container 2, the suction force due to the release of the internal pressure and the annular valve portion 29 Due to the pressing force on the seat 26, the surface of the annular valve portion 29 is immediately brought into close proximity (substantially close) so that the surface of the annular valve portion 29 fits from the top surface of the projection 27a of the annular valve seat 26 along the bottom surface of the concave portion 27b. be able to.

要するに、本発明の実施形態に係るキャップ１では、環状弁座２６の、環状弁部２９との接触面全域が梨地状面に形成されているので、環状弁部２９と環状弁座２６との間の内容物が乾燥固化した状態であっても両者２９、２６の貼り付きを抑制でき、内容物の使用時における、逆止弁１２の応答性を良好にする作用効果と、内容物の使用後において、外部に吐出されなかった内容物の一部を確実に容器２内に戻しつつ、僅かな時間後容器２内を密閉状態とする作用効果との両方を奏することができる。   In short, in the cap 1 according to the embodiment of the present invention, the entire contact surface of the annular valve seat 26 with the annular valve portion 29 is formed in a matte surface, so that the annular valve portion 29 and the annular valve seat 26 Even when the contents between the two are dried and solidified, the sticking of the two 29 and 26 can be suppressed, the effect of improving the responsiveness of the check valve 12 at the time of using the contents, and the use of the contents. Later, both the operation and the effect of closing the inside of the container 2 after a short period of time can be achieved while reliably returning a part of the contents not discharged to the outside to the inside of the container 2.

なお、本実施形態では、環状弁座２６の、環状弁部２９との接触面全域を梨地状面に形成しているが、環状弁部２９の、環状弁座２６との接触面全域に梨地状面を形成してもよいし、環状弁座２６の、環状弁部２９との接触面全域と、環状弁部２９の、環状弁座２６との接触面全域との両方に梨地状面を形成してもよい。   In the present embodiment, the entire contact surface of the annular valve seat 26 with the annular valve portion 29 is formed in a matte surface. However, the entire contact surface of the annular valve portion 29 with the annular valve seat 26 is matte. The annular surface may be formed, or the matte surface may be formed on both the entire contact surface of the annular valve seat 26 with the annular valve portion 29 and the entire contact surface of the annular valve portion 29 with the annular valve seat 26. It may be formed.

また、本実施形態では、環状弁座２６の、環状弁部２９との接触面全域を梨地状面に形成しているが、環状弁座２６の、環状弁部２９との接触面の一部を梨地状面に形成してもよい。例えば、図６に示すように、環状弁座２６の、環状弁部２９との接触面の一部、すなわちヒンジ６側とは反対側の周方向のほぼ１／４の範囲（９０°の範囲）の径方向全域に梨地状面を形成してもよい。環状弁座２６の一部に梨地状面を設ける場合、ヒンジ６側とは反対側の位置に設けるほうが、内容物の容器２内への戻り易さの観点から好ましい。また、環状弁部２９の、環状弁座２６との接触面の一部に梨地状面を形成してもよく、この形態の場合も、同様にヒンジ６側とは反対側の位置に設けるほうが好ましい。さらに、環状弁座２６の、環状弁部２９との接触面の一部に梨地状面を形成して、環状弁部２９の、環状弁座２６に設けた梨地状面と重なる位置、または重ならない位置に梨地状面を形成してもよい。   Further, in the present embodiment, the entire contact surface of the annular valve seat 26 with the annular valve portion 29 is formed in a matte surface, but a part of the contact surface of the annular valve seat 26 with the annular valve portion 29 is formed. May be formed on the satin surface. For example, as shown in FIG. 6, a part of the contact surface of the annular valve seat 26 with the annular valve portion 29, that is, a substantially one-quarter range (90 ° range) in the circumferential direction on the opposite side to the hinge 6 side. A satin-like surface may be formed in the entire radial direction of (2). When a matte surface is provided on a part of the annular valve seat 26, it is preferable to provide the satin-finished surface at a position opposite to the hinge 6 from the viewpoint of easy return of the contents into the container 2. Further, a matte surface may be formed on a part of the contact surface of the annular valve portion 29 with the annular valve seat 26, and in this case, it is also better to provide the annular valve portion 29 at a position opposite to the hinge 6 side. preferable. Further, a matte surface is formed on a part of the contact surface of the annular valve seat 26 with the annular valve portion 29, and a position or weight of the annular valve portion 29 overlapping with the matte surface provided on the annular valve seat 26. A satin-like surface may be formed at a position where it is not necessary.

１ キャップ，２ 容器，３ 容器口部，４ キャップ本体，１２ 逆止弁，２５ 連通孔，２６ 環状弁座，２７ａ 凸部（梨地状面），２７ｂ 凹部（梨地状面），２９ 環状弁部，４１ 吐出通路   DESCRIPTION OF SYMBOLS 1 cap, 2 containers, 3 container mouths, 4 cap main bodies, 12 check valves, 25 communication holes, 26 annular valve seats, 27a convex portion (satin surface), 27b concave portion (satin surface), 29 annular valve portions , 41 discharge passage

Claims (3)

容器口部に装着する筒状のキャップ本体を備えた、合成樹脂製のキャップであって、
前記キャップ本体は、
容器内の内容物を吐出する吐出通路と、
該吐出通路と前記容器口部とを連通する連通孔と、
該連通孔周辺に設けられた環状弁座と、
該連通孔の軸線方向に沿って弾性変形して、環状弁部が前記環状弁座に着座または離脱することで前記連通孔を開閉する逆止弁と、
を備え、
前記環状弁部と前記環状弁座との、いずれか一方または両方の接触面が梨地状面に形成されており、
前記梨地状面は、金型の表面に放電加工により設けた凹凸形状により成形され、
前記金型の表面に設けた粗度（Ｒｚ）は１０〜２００μｍに設定されることを特徴とするキャップ。 A synthetic resin cap comprising a cylindrical cap body attached to the container mouth,
The cap body is
A discharge passage for discharging the contents in the container,
A communication hole communicating the discharge passage with the container mouth,
An annular valve seat provided around the communication hole;
A check valve that elastically deforms along the axial direction of the communication hole to open and close the communication hole by the annular valve portion being seated or separated from the annular valve seat;
With
One or both contact surfaces of the annular valve portion and the annular valve seat are formed in a matte surface ,
The satin-like surface is formed by irregularities provided on the surface of the mold by electric discharge machining,
The roughness (Rz) provided on the surface of the mold is set to 10 to 200 μm . 前記環状弁部と前記環状弁座との、いずれか一方または両方の接触面全域が梨地状面に形成されることを特徴とする請求項１に記載のキャップ。   2. The cap according to claim 1, wherein an entire contact surface of one or both of the annular valve portion and the annular valve seat is formed in a matte surface. 3. 前記逆止弁を成形する合成樹脂は、前記環状弁座を成形する合成樹脂よりも高弾性であることを特徴とする請求項１または２に記載のキャップ。   3. The cap according to claim 1, wherein a synthetic resin forming the check valve has higher elasticity than a synthetic resin forming the annular valve seat. 4.
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JPH084436Y2 (en) * 1989-12-06 1996-02-07 ライオン株式会社 Automatic opening and closing cap
JPH0532706U (en) * 1991-03-16 1993-04-30 株式会社荒井製作所 Oil level gauge
DE4417569A1 (en) * 1994-05-19 1995-11-23 Zeller Plastik Koehn Graebner Closure with self-closing valve
JP2003120681A (en) * 2001-10-18 2003-04-23 Nakanishi Metal Works Co Ltd Method for manufacturing resin ball retainer for bearing
JP2013241197A (en) * 2012-05-21 2013-12-05 Daiwa Can Co Ltd Cap
JP5959570B2 (en) * 2014-05-14 2016-08-02 東京ライト工業株式会社 cap
KR102183292B1 (en) * 2014-05-14 2020-11-26 도쿄 라이트 고교 가부시키가이샤 Cap

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