JP3961507B2 - Backflow prevention stopper and container - Google Patents

Backflow prevention stopper and container Download PDF

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Publication number
JP3961507B2
JP3961507B2 JP2004122149A JP2004122149A JP3961507B2 JP 3961507 B2 JP3961507 B2 JP 3961507B2 JP 2004122149 A JP2004122149 A JP 2004122149A JP 2004122149 A JP2004122149 A JP 2004122149A JP 3961507 B2 JP3961507 B2 JP 3961507B2
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plug member
plug
film body
elastic film
discharge port
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JP2005306394A (en
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浩一 松本
政安 宮崎
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Sumitomo Rubber Industries Ltd
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Sumitomo Rubber Industries Ltd
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Priority to JP2004122149A priority Critical patent/JP3961507B2/en
Priority to EP04030363A priority patent/EP1561699B1/en
Priority to DE602004024498T priority patent/DE602004024498D1/en
Priority to US11/024,776 priority patent/US7490744B2/en
Priority to CNB2005100062174A priority patent/CN100542906C/en
Publication of JP2005306394A publication Critical patent/JP2005306394A/en
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Publication of JP3961507B2 publication Critical patent/JP3961507B2/en
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Description

本発明は、容器の口部に取付けられる逆流防止口栓およびこの逆流防止口栓を備えた容器に関するものである。   The present invention relates to a backflow prevention stopper plug attached to a mouth portion of a container and a container provided with the backflow prevention stopper plug.

従来の逆流防止口栓としては、例えば、球状弁とこの球状弁を収納する栓本体とを備え、栓本体内の球体収納部に前記球状弁を収納したものがある。この逆流防止口栓では、球体収納部内に球状弁と接触してシールを行う下止部と、下止部の上方に球状弁を掛止する上止部とが形成されており、使用する際に球状弁が下止部と上止部との間を移動できるようになっている（例えば、特許文献１参照）。
特開２００２−３９４０９号公報（請求項１、第３頁、第２図） As a conventional backflow prevention port plug, for example, there is a valve that includes a spherical valve and a plug body that houses the spherical valve, and the spherical valve is housed in a sphere housing portion in the plug body. In this backflow prevention plug, there are formed a bottom stop portion that seals in contact with the spherical valve in the spherical housing portion, and a top stop portion that latches the spherical valve above the bottom stop portion. The spherical valve can move between the bottom stop and the top stop (see, for example, Patent Document 1).
JP 2002-39409 A (Claim 1, page 3, FIG. 2)

前記従来の逆流防止口栓では、球状弁が球体収納部内で移動できるような構成であるため、球状弁が下止部に接触してシールを行っているときには、球状弁の上方に空隙ができて内容物が残留する場合がある。このように残留した内容物は外気に含まれる酸素や雑菌に触れ、酸化、汚染等するおそれがある。また、球状弁が上止部側から下止部に移動し到達する間に全くシール部がなく、容器内に外気や雑菌が逆流することも考えられる。
本発明は上記の事情に鑑みてなされたものであり、その内部に空隙が極力生じないようにして内容物の残留を最少限にでき、しかもシール性能の向上した逆流防止口栓を提供することを目的とする。 Since the conventional backflow prevention stopper plug is configured such that the spherical valve can move within the spherical body storage portion, when the spherical valve is in contact with the bottom stop for sealing, a gap is formed above the spherical valve. The contents may remain. The contents remaining in this way may come into contact with oxygen and germs contained in the outside air, and may be oxidized or contaminated. Further, it is conceivable that there is no seal part at all while the spherical valve moves from the upper stopper side to the lower stopper part and reaches, so that outside air and germs flow back into the container.
The present invention has been made in view of the above circumstances, and provides a backflow prevention plug that can minimize the residue of the contents while minimizing the generation of voids therein and that has improved sealing performance. With the goal.

本発明の他の目的は、その内部に空隙が極力生じないようにして内容物の残留を最少限にでき、しかもシール性能を向上した逆流防止口栓を備えた容器を提供することである。   Another object of the present invention is to provide a container equipped with a backflow prevention plug that can minimize the residual of the contents while minimizing the generation of voids in the interior thereof and has improved sealing performance.

本発明は、上記目的を達成するために以下の技術的手段を講じた。
すなわち、第１に、流動体を吐出する吐出口５を有していて容器口部３に設けられる弾性膜体７と、弾性膜体７内に配置されていて流動体の流出を閉栓可能な栓部材８とを備えた逆流防止口栓４において、弾性膜体７の吐出口５側の周囲には厚肉部１２と薄肉部１３とが周方向交互に設けられ、前記厚肉部１２は、前記弾性膜体７の外面から外方に膨出形成された突起状とされており、前記栓部材８は、弾性膜体７が弾力的に密着する球状シール面１４を有しており、弾性膜体７内には複数の栓部材８が配設されていることである。 In order to achieve the above object, the present invention has taken the following technical means.
That is, firstly, it has a discharge port 5 for discharging a fluid and is provided in the container port 3, and is disposed in the elastic film body 7 so that the outflow of the fluid can be closed. in the backflow preventing mouth plug 4 and a plug member 8, and the thick-walled portion 12 and the thin portion 13 is provided in the circumferential direction alternately around the discharge port 5 side of the elastic membrane element 7, the thick portion 12 the provided from the outer surface of the elastic membrane element 7 is a outward bulging formed protrusion, the plug member 8 has a spherical sealing surface 14 of the elastic membrane element 7 elastically in close contact, A plurality of plug members 8 are arranged in the elastic film body 7.

これによれば、流動体が吐出口５から吐出される場合、弾性膜体７では厚肉部１２よりも薄肉部１３の方が膨れやすく伸びやすくなっており、容器１の内圧上昇によって流動体は薄肉部１３を通じて吐出口５から吐出されることになる。このとき厚肉部１２は、薄肉部１３よりも膨れ難く伸び難くなっており、弾性膜体７内の栓部材８が吐出口５に密着しないように栓部材８の吐出方向への移動を規制する。したがって、逆流防止口栓４は、使用時には栓部材８が吐出口５を塞ぐことなく流動体を確実に吐出でき、一方、不使用時には弾性膜体７が栓部材８に弾力的に密着することで吐出口５と栓部材８との間に空隙が生じないようにして流動体が残留しないようにできるのである。そして、複数の栓部材８を弾性膜体７内に設けることによって、シール性能を向上できるのである。   According to this, when the fluid is discharged from the discharge port 5, in the elastic film body 7, the thin portion 13 is easier to swell than the thick portion 12, and the elastic body 7 tends to expand. Is discharged from the discharge port 5 through the thin portion 13. At this time, the thick portion 12 is less likely to swell and extend than the thin portion 13, and restricts the movement of the plug member 8 in the discharge direction so that the plug member 8 in the elastic film body 7 does not adhere to the discharge port 5. To do. Accordingly, the backflow prevention port plug 4 can reliably discharge the fluid without the plug member 8 blocking the discharge port 5 when in use, and the elastic film body 7 can be elastically adhered to the plug member 8 when not in use. Thus, it is possible to prevent a fluid from remaining by preventing a gap from being formed between the discharge port 5 and the plug member 8. The sealing performance can be improved by providing the plurality of plug members 8 in the elastic film body 7.

第２に、流動体を吐出する吐出口５を有していて容器口部３に設けられる弾性膜体７と、弾性膜体７内に配置されていて流動体の流出を閉栓可能な栓部材８とを備えた逆流防止口栓４において、前記弾性膜体７は一端側に先端部７ａを有し、前記吐出口５は前記先端部７ａの突端に設けられ、前記弾性膜体７の先端部７ａには、厚肉部１２と薄肉部１３が周方向に交互に設けられており、前記厚肉部１２は、前記弾性膜体７の外面から外方に膨出形成された突起状とされており、栓部材８は、弾性膜体７が弾力的に密着する球状シール面１４を有する第１栓部材８ａおよび第２栓部材８ｂからなり、第１栓部材８ａは、前記弾性膜体７の先端部７ａ内に配設され、第２栓部材８ｂは、弾性膜体７内で第１栓部材８ａよりも容器口部３寄りに配置されており、前記第１栓部材８ａは球状とされていて前記先端部７ａの内面に密着して配設されており、前記厚肉部１２は、前記第１栓部材８ａの球状シール面１４における複数の法線の交点と前記吐出口５との間で先端部７ａに設けられていることである。 Secondly, an elastic film body 7 having a discharge port 5 for discharging a fluid and provided in the container port 3 and a plug member disposed in the elastic film body 7 and capable of closing the outflow of the fluid 8, the elastic film body 7 has a distal end portion 7 a on one end side, the discharge port 5 is provided at the protruding end of the distal end portion 7 a, and the distal end of the elastic film body 7 is provided. the part 7a, the thick portion 12 and the thin portions 13 are alternately provided in a circumferential direction, the thick portion 12 has a projecting shape is bulged formed outwardly from the outer surface of the elastic membrane element 7 The plug member 8 includes a first plug member 8a and a second plug member 8b having a spherical sealing surface 14 to which the elastic film body 7 is elastically adhered, and the first plug member 8a includes the elastic film body. The second plug member 8b is disposed in the elastic membrane body 7 closer to the container mouth 3 than the first plug member 8a. Being, the first plug member 8a is disposed in close contact with the inner surface of the tip portion 7a have been spherical, the thick portion 12, the spherical sealing surface 14 of the first plug member 8a Is provided at the tip 7 a between the intersection of the plurality of normal lines and the discharge port 5 .

これによれば、流動体を薄肉部１３から吐出口５側に向かって流れるようにし、このとき厚肉部１２は先端部７ａ内の第１栓部材８ａが吐出口５に密着しないように規制する。したがって、不使用時に、第１栓部材８ａを吐出口５の内側に密着させた状態であっても、使用時は流動体を吐出口５から吐出させることができ、第１栓部材８ａと吐出口５との間に空隙が生じないようにして、流動体が残留しないようにできる。そして、第１栓部材８ａと第２栓部材８ｂを弾性膜体７内に設けることでシール性能を向上できる。
第３に、前記厚肉部１２は、肉厚部における肉厚が最大になる部分の表面と前記第１栓部材８ａの球心とを結ぶ線が、前記吐出口５中心と前記第１栓部材８ａの球心とを結ぶ線に対してなす角度θが、３０゜＜θ＜９０゜となるように構成されていることである。 According to this, the fluid is allowed to flow from the thin portion 13 toward the discharge port 5, and at this time, the thick portion 12 is restricted so that the first plug member 8 a in the distal end portion 7 a does not adhere to the discharge port 5. To do. Therefore, even when the first plug member 8a is in close contact with the inside of the discharge port 5 when not in use, the fluid can be discharged from the discharge port 5 during use, and the first plug member 8a and the discharge port can be discharged. It is possible to prevent a fluid from remaining by preventing a gap from being formed between the outlet 5 and the outlet 5. The sealing performance can be improved by providing the first plug member 8 a and the second plug member 8 b in the elastic film body 7.
Third, the thick portion 12 has a line connecting the surface of the thickest portion where the thickness is maximized and the spherical center of the first plug member 8a so that the center of the discharge port 5 and the first plug are connected. The angle θ formed with respect to the line connecting the sphere center of the member 8a is configured to satisfy 30 ° <θ <90 ° .

これによれば、厚肉部１２は、栓部材８の中心よりも吐出口５寄りで先端部７ａに設けられることにより、使用時に栓部材８が吐出口５を塞ぐことのないようにその移動を確実に規制できるのである。
第４に、弾性膜体７は、前記厚肉部１２の最大肉厚ｔ１と前記薄肉部１３の肉厚ｔ２との比（ｔ１／ｔ２）が２、３または４であることである。
本発明に係る他の逆流防止口栓は、流動体を吐出する吐出口５を有していて容器口部３に設けられる弾性膜体７と、弾性膜体７内に配置されていて流動体の流出を閉栓可能な栓部材８とを備えた逆流防止口栓４において、前記弾性膜体７は一端側に略半球状の先端部７ａを有し、前記吐出口５は前記先端部７ａの突端に設けられ、前記弾性膜体７の先端部７ａには、厚肉部１２と薄肉部１３とが周方向に交互に設けられており、前記厚肉部１２は、前記弾性膜体７の外面から外方に膨出形成された突起状とされており、栓部材８は、弾性膜体７が弾力的に密着する球状シール面１４を有する第１栓部材８ａおよび第２栓部材８ｂからなり、第１栓部材８ａは、前記弾性膜体７の先端部７ａ内に配設され、第２栓部材８ｂは、弾性膜体７内で第１栓部材８ａよりも容器口部３寄りに配置されている。 According to this, the thick portion 12, by being provided at a distal end portion 7a in the discharge port 5 nearer center of the plug member 8, as the plug member 8 is never close the discharge port 5 at the time of use That movement can be reliably regulated.
Fourth, the elastic membrane element 7, the ratio of the maximum thickness t1 of the thick portion 12 and the thickness t2 of the thin portion 13 (t1 / t2) is to be 2, 3 or 4.
Other backflow prevention port plugs according to the present invention have a discharge port 5 for discharging a fluid, and an elastic film body 7 provided in the container mouth portion 3 and a fluid film disposed in the elastic film body 7. In the backflow prevention port plug 4 provided with a plug member 8 capable of closing the outflow of water, the elastic membrane body 7 has a substantially hemispherical tip portion 7a on one end side, and the discharge port 5 is connected to the tip portion 7a. Thick portions 12 and thin portions 13 are alternately provided in the circumferential direction at the tip portion 7 a of the elastic film body 7 provided at the projecting end. The plug member 8 has a spherical seal surface 14 with which the elastic film body 7 is elastically adhered to the first plug member 8a and the second plug member 8b. The first plug member 8a is disposed in the distal end portion 7a of the elastic film body 7, and the second plug member 8b is disposed in the elastic film body 7 in the first position. It is arranged in the container mouth part 3 nearer plug member 8a.

好ましくは、前記弾性膜体７内には第１栓部材８ａまたは第２栓部材８ｂと密着してシールを行う環状突起部１５が設けられている。
また、上記のような逆流防止口栓４を容器口部３に設けることによって、流動体の酸化や汚染を防止しながら最後まで使用することができる。 Preferably, the elastic film body 7 is provided with an annular protrusion 15 that seals in close contact with the first plug member 8a or the second plug member 8b.
Moreover, by providing the backflow prevention stopper plug 4 as described above in the container opening portion 3, it can be used to the end while preventing oxidation and contamination of the fluid.

本発明によれば、逆流防止口栓内部に空隙が極力生じないようにして内容物の残留を最少限にでき、シール性能も向上できる。   According to the present invention, it is possible to minimize the residual content and to improve the sealing performance so as not to generate a void as much as possible inside the backflow prevention plug.

以下、図面を参照しながら本発明の実施の形態を説明する。
図１乃至図３の第１実施形態において、容器１は収縮可能な容器本体２と、容器本体２の容器口部３に設けられた逆流防止口栓４を有している。逆流防止口栓４は容器口部３に取り付けられており、使用時に先端部の吐出口５から内容物である流動体を吐出可能としている。容器本体２内に収容される流動体は液体、ペースト状、気体等の流動性のあるものが該当するが、この実施の形態では、目薬（点眼薬剤）等のように容器１外に滴下して使用されるもの（液体）を一例として説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the first embodiment shown in FIGS. 1 to 3, the container 1 has a shrinkable container body 2 and a backflow prevention stopper plug 4 provided in the container mouth 3 of the container body 2. The backflow prevention stopper plug 4 is attached to the container mouth portion 3 so that the fluid as the contents can be discharged from the discharge port 5 at the tip portion during use. The fluid contained in the container body 2 corresponds to fluids such as liquid, paste, and gas, but in this embodiment, the fluid is dropped outside the container 1 like eye drops (eye drops). What is used (liquid) will be described as an example.

逆流防止口栓４は、前記吐出口５が形成された弾性膜体７と、弾性膜体７内に配置されていて流動体の流動を閉栓可能な栓部材８を有している。前記弾性膜体７は、取付部材８９を介して容器口部３に取り付けられている。
弾性膜体７は薄膜製とされていて、栓部材８に弾力的に密着（接触）している。この弾性膜体７は、サック状（袋状）に形成されており、その先端部７ａが略半球状のドーム形状とされ、その胴部（中途部）７ｂが円筒状とされている。弾性膜体７の基部（先端部７ａとは反対の端部）には、円形のつば部７ｃが設けられている。弾性膜体７の外面には、取付部材８９の上部を覆う環状カバー部２１が設けられており、この環状カバー部２１によって取付部材８９の上部を覆うことで弾性膜体７と取付部材８９の間に隙間ができないようにして、デザイン上も良くし、異物等が弾性膜体７と取付部材８９の間に入り込まないようになっている。 The backflow prevention port plug 4 includes an elastic film body 7 in which the discharge port 5 is formed, and a plug member 8 disposed in the elastic film body 7 and capable of closing the flow of the fluid. The elastic film body 7 is attached to the container mouth 3 via an attachment member 89.
The elastic film body 7 is made of a thin film and is in close contact (contact) with the plug member 8 elastically. This elastic film body 7 is formed in a sack shape (bag shape), its tip end portion 7a has a substantially hemispherical dome shape, and its body portion (midway portion) 7b has a cylindrical shape. A circular collar 7c is provided at the base of the elastic film body 7 (the end opposite to the tip 7a). An annular cover portion 21 is provided on the outer surface of the elastic film body 7 so as to cover the upper portion of the attachment member 89. The upper portion of the attachment member 89 is covered with the annular cover portion 21, so that the elastic film body 7 and the attachment member 89 are covered. In order to prevent a gap from being formed, the design is improved, and foreign matter or the like is prevented from entering between the elastic film body 7 and the mounting member 89.

この弾性膜体７内には複数の栓部材８が配設されている。前記弾性膜体７の先端部７ａの内面に密着するように第１栓部材８ａが配設され、弾性膜体７の胴部７ｂ内で容器口部３寄りの位置に第２栓部材８ｂが配設されている。
前記弾性膜体７の吐出口５は、前記弾性膜体７の先端部７ａの突端に設けられており、一文字（十文字でもよい）の切れ込み状（スリット状）、または、ダックビル状に形成されており、その縁部同士が密着した状態となっている。吐出口５の周囲には流動体の吐出方向に突出した円筒状の液溜部１１が形成されている。 A plurality of plug members 8 are disposed in the elastic film body 7. A first plug member 8a is disposed so as to be in close contact with the inner surface of the distal end portion 7a of the elastic film body 7, and the second plug member 8b is disposed at a position near the container mouth 3 in the body portion 7b of the elastic film body 7. It is arranged.
The discharge port 5 of the elastic film body 7 is provided at the protruding end of the distal end portion 7a of the elastic film body 7, and is formed in a cut shape (slit shape) or a duck bill shape of one character (may be a ten character). The edges are in close contact with each other. A cylindrical liquid reservoir 11 protruding in the fluid discharge direction is formed around the discharge port 5.

流動体が目薬等の液体の場合、前記液溜部１１は内面の表面張力によって吐出口５から出てきた液体を所定量溜めておくことができる。このように液溜部１１に目薬等の液体をためておくことで所望の滴下量を確保できるようになっている。
図１乃至図３に示すように、弾性膜体７に形成された吐出口５の下方には、複数（図例では３つ）の厚肉部１２が形成されている。厚肉部１２は、略半球状の先端部７ａの円周方向（弾性膜体７の胴部７ｂの円周方向）に沿って間隔をおいて形成されている。厚肉部１２は、吐出口５側の周囲に周方向に等間隔で配設されており、厚肉部１２間にはこの厚肉部１２よりも膨れやすく伸びやすい薄肉部１３が設けられている。したがって図２、図３に示すように、吐出口５側の周囲には、厚肉部１２と薄肉部１３が周方向に交互に配設されることになる。 When the fluid is a liquid such as eye drops, the liquid reservoir 11 can store a predetermined amount of liquid that has come out of the discharge port 5 due to the surface tension of the inner surface. Thus, by storing liquid such as eye drops in the liquid reservoir 11, a desired dripping amount can be secured.
As shown in FIGS. 1 to 3, a plurality of (three in the illustrated example) thick portions 12 are formed below the discharge ports 5 formed in the elastic film body 7. The thick part 12 is formed at intervals along the circumferential direction of the substantially hemispherical tip part 7a (the circumferential direction of the body part 7b of the elastic film body 7). The thick wall portions 12 are arranged at equal intervals in the circumferential direction around the discharge port 5, and between the thick wall portions 12, thin wall portions 13 that are easier to swell and extend than the thick wall portions 12 are provided. Yes. Therefore, as shown in FIGS. 2 and 3, the thick portions 12 and the thin portions 13 are alternately arranged in the circumferential direction around the discharge port 5.

厚肉部１２は、弾性膜体７の外面から外方に膨出形成された突起状とされている。この厚肉部１２は、図３に示すように正面視でほぼ楕円状に形成されており、第１実施形態では、弾性膜体７の長手方向（以下、上下方向という）の長さＬ１が周方向の長さＬ２よりも長く形成されている。また、厚肉部１２の上下方向の長さＬ１と周方向の長さＬ２の比（Ｌ１／Ｌ２）は約２程度となっている。
図１に示すように厚肉部１２の外面は外方に凸となる円弧形状となっている。したがって、厚肉部１２は、上下方向における中央（図１の１点鎖線Ｘで示す位置）の肉厚が最大になっており、この中央から上下方向に向かって徐々に肉厚が薄くなっている。前記厚肉部１２は、第１栓部材８ａの球心よりも上方に位置している。したがって、厚肉部１２は第１栓部材８ａの球心と前記吐出口５との間で弾性膜体７の先端部７ａに設けられている。 The thick portion 12 is formed in a protruding shape that bulges outward from the outer surface of the elastic film body 7. As shown in FIG. 3, the thick portion 12 is formed in an approximately elliptical shape when viewed from the front. In the first embodiment, the length L1 of the elastic film body 7 in the longitudinal direction (hereinafter referred to as the vertical direction) is It is formed longer than the circumferential length L2. The ratio (L1 / L2) of the length L1 in the vertical direction and the length L2 in the circumferential direction of the thick portion 12 is about 2.
As shown in FIG. 1, the outer surface of the thick portion 12 has an arc shape that protrudes outward. Therefore, the thick portion 12 has the maximum thickness at the center in the vertical direction (position indicated by the one-dot chain line X in FIG. 1), and the thickness gradually decreases from the center in the vertical direction. Yes. The thick part 12 is located above the spherical center of the first plug member 8a. Therefore, the thick portion 12 is provided at the distal end portion 7 a of the elastic film body 7 between the spherical center of the first plug member 8 a and the discharge port 5.

この厚肉部１２の中央と第１栓部材８ａの中心を結ぶ線の水平方向に対する角度θは、０°＜θ＜６０°の範囲が望ましく、より好ましくは、１０°≦θ≦３０°とされているのがよい。
なお、弾性膜体７の厚肉部１２の最大肉厚ｔ１と薄肉部１３の肉厚ｔ２との比（ｔ１／ｔ２）は約２、３または約４程度とされている。
図３に示す符号Ｙは、厚肉部１２の吐出口５寄りの端部１２ａ（上端）と、円筒部１１の外面下端部との距離で、使用時に第１栓部材８ａと吐出口５との吐出方向における離間のための距離である。 The angle θ with respect to the horizontal direction of the line connecting the center of the thick portion 12 and the center of the first plug member 8a is desirably in the range of 0 ° <θ <60 °, more preferably 10 ° ≦ θ ≦ 30 °. It is good to be.
The ratio (t1 / t2) between the maximum thickness t1 of the thick portion 12 of the elastic film body 7 and the thickness t2 of the thin portion 13 is about 2, 3 or about 4.
3 is the distance between the end 12a (upper end) of the thick portion 12 near the discharge port 5 and the lower end of the outer surface of the cylindrical portion 11, and the first plug member 8a and the discharge port 5 are This is a distance for separation in the discharge direction.

このように距離Ｙを設けることで、この厚肉部１２の端部１２ａと円筒部１１との間は厚肉部１２よりも膨れやすく伸びやすい薄肉部１３ａとなっている。すなわち、この弾性変形しやすい薄肉部１３ａは前記端部１２ａと、円筒部１１の外面下端部または吐出口５との間で、この外面下端部または吐出口５の全周囲にわたって形成されることになる。
このように、円筒部１１の外面下端部または吐出口５の全周囲にわたって薄肉部１３ａを形成することで、厚肉部１２間の薄肉部１３を通過してきた流動体を吐出口５に案内しやすくなり、流動体の流動をスムーズにできるようになっている。 By providing the distance Y in this way, the thin portion 13a is more easily expanded than the thick portion 12 between the end portion 12a of the thick portion 12 and the cylindrical portion 11. That is, the thin-walled portion 13a that is easily elastically deformed is formed between the end portion 12a and the outer surface lower end portion or the discharge port 5 of the cylindrical portion 11 over the entire periphery of the outer surface lower end portion or the discharge port 5. Become.
In this way, by forming the thin portion 13 a over the entire lower end of the outer surface of the cylindrical portion 11 or the discharge port 5, the fluid that has passed through the thin portion 13 between the thick portions 12 is guided to the discharge port 5. It becomes easier and the flow of the fluid can be made smooth.

弾性膜体７の材料は、流動体の粘度、粒度等の物理的性質、ＰＨ等の化学的性質、そして外観、経済性、使い勝手等を考慮して、ゴム、樹脂等から自由に選択して成形できる。
例えば、ＮＲ、ＳＢＲ、ＢＲ、ＮＢＲ、ＣＲ、ＥＰＭ、ＥＰＤＭ、ＩＲ、ＩＩＲ、ＦＫＭ、ＶＭＱ、Ｕ、Ｔ、ＣＯ、ＡＣＭ等のうち、少なくとも１種類以上から構成されるゴム弾性体、ＳＢＳ、ＳＩＢＳ、ＳＥＢＳ、ＳＩＳ、ＳＥＰＳ、ＳＥＥＰＳ、ＴＰＯ、ＴＰＵ、ＴＰＥＥ、ＴＰＡＥ、ＴＰＶＣ、１、２−ポリブタジエン系熱可塑性エラストマー、フッ素系熱可塑性エラストマー等、そして、それらの複合体なども使用することが可能である。 The material of the elastic film body 7 can be freely selected from rubber, resin, etc. in consideration of physical properties such as viscosity and particle size of the fluid, chemical properties such as PH, and appearance, economy, and convenience. Can be molded.
For example, rubber elastic body composed of at least one of NR, SBR, BR, NBR, CR, EPM, EPDM, IR, IIR, FKM, VMQ, U, T, CO, ACM, etc., SBS, SIBS , SEBS, SIS, SEPS, SEEPS, TPO, TPU, TPEE, TPAE, TPVC, 1,2-polybutadiene thermoplastic elastomer, fluorine thermoplastic elastomer, etc., and composites thereof can also be used. is there.

前記栓部材８（８ａ、８ｂ）は、例えば、硬質樹脂等によって形成された中実状の球状体からなる。この栓部材８（８ａ、８ｂ）の直径は、弾性膜体７の胴部７ｂの内径よりも大きく形成されており、栓部材８（８ａ、８ｂ）が弾性膜体７内に配設されると、栓部材８（８ａ、８ｂ）は、弾性膜体７内面に密着（接触）し、栓部材８（８ａ、８ｂ）と密着（接触）している弾性膜体７は外方に膨張するように弾性変形することとなる。栓部材８（８ａ、８ｂ）は、弾性膜体７が弾性変形することによって生じた弾性力によって押さえ付けられ、弾性膜体７内で保持されている。   The plug member 8 (8a, 8b) is made of, for example, a solid spherical body made of hard resin or the like. The diameter of the plug member 8 (8a, 8b) is larger than the inner diameter of the body portion 7b of the elastic film body 7, and the plug member 8 (8a, 8b) is disposed in the elastic film body 7. The plug member 8 (8a, 8b) is in close contact with (in contact with) the inner surface of the elastic film body 7, and the elastic film body 7 in close contact with (in contact with) the plug member 8 (8a, 8b) expands outward. Will be elastically deformed. The plug member 8 (8a, 8b) is pressed by the elastic force generated by elastic deformation of the elastic film body 7, and is held in the elastic film body 7.

また、第２栓部材８ｂの直径は、第１栓部材８ａの直径よりも大きくなっており、これによって、第２栓部材８ｂは、第１栓部材８ａよりも弾性膜体７を大きく弾性変形させてシールを強めにしている。このように、逆流防止口栓４は、第１栓部材８ａと第２栓部材８ｂの直径を異ならせることによって、シールを部分的に強めたりして調節できるようになっている。
なお、第２栓部材８ｂの直径は、容器口部３の口径よりもやや大きくされており、この第２栓部材８ｂが容器口部３に嵌ることを防止している。このように、容器口部３の口径は、第２栓部材８ｂの直径との関係で決められるため、第２栓部材８ｂを直径を大きくすることによって、容器口部３の口径を大きくすることができ、これによって流動体の容器本体３の充填作業が容易に行えるようになっている。 In addition, the diameter of the second plug member 8b is larger than the diameter of the first plug member 8a, whereby the second plug member 8b elastically deforms the elastic film body 7 to a greater extent than the first plug member 8a. The seal is strengthened. In this way, the backflow prevention port plug 4 can be adjusted by partially strengthening the seal by making the diameters of the first plug member 8a and the second plug member 8b different.
Note that the diameter of the second plug member 8 b is slightly larger than the diameter of the container mouth portion 3, thereby preventing the second plug member 8 b from fitting into the container mouth portion 3. As described above, since the diameter of the container mouth portion 3 is determined in relation to the diameter of the second stopper member 8b, the diameter of the container mouth portion 3 is increased by increasing the diameter of the second stopper member 8b. Thus, the filling operation of the fluid container body 3 can be easily performed.

第１栓部材８ａは、第２栓部材８ｂよりも小さくされているが、第２栓部材８ｂが容器口部３との間にあるため、容器口部３に入り込むことはない。
栓部材８（８ａ、８ｂ）は球状体であるので、その表面は球面となっている。栓部材８（８ａ、８ｂ）は、この球面に弾性膜体７が弾力的に密着（接触）することによりシールをしている。以下、このようにシールを行う栓部材８（８ａ，８ｂ）の表面（球面）を球状シール面１４という。この球状シール面１４は球面形状であるので、平坦面の場合よりも広いシール面積を確保できる。 Although the first plug member 8a is smaller than the second plug member 8b, since the second plug member 8b is located between the container port portion 3 and the first plug member 8a, it does not enter the container port portion 3.
Since the plug member 8 (8a, 8b) is a spherical body, the surface thereof is a spherical surface. The plug member 8 (8a, 8b) is sealed by the elastic film body 7 being in close contact (contact) with the spherical surface. Hereinafter, the surface (spherical surface) of the plug member 8 (8a, 8b) that performs the sealing in this way is referred to as a spherical sealing surface. Since the spherical sealing surface 14 has a spherical shape, a larger sealing area can be secured than in the case of a flat surface.

弾性膜体７は薄膜製であるので、密着（接触）部分では、弾性膜体７の内面及び外面は球状シール面１４の球面形状に対応して球面状に弾性変形されている。したがって、密着（接触）部分では、球状シール面１４と弾性膜体７とによるシールが、球面同士の密着（接触）によってなされるのである。このように、球面同士の密着（接触）では、密着（接触）部分における各接点における弾性膜体７の弾性力は、球状シール面１４の球心に向かう求心方向に作用することになる。
すなわち、いずれの接点においても、求心方向への均一な弾性力（弾性復元力）が作用し、これによって、密着（接触）性が高まって、広い面で、確実かつ高い逆流防止機能を発揮できるようになっている。 Since the elastic film body 7 is made of a thin film, the inner surface and the outer surface of the elastic film body 7 are elastically deformed into a spherical shape corresponding to the spherical shape of the spherical seal surface 14 at the close contact (contact) portion. Therefore, in the close contact (contact) portion, the sealing by the spherical seal surface 14 and the elastic film body 7 is performed by close contact (contact) between the spherical surfaces. Thus, in the close contact (contact) between the spherical surfaces, the elastic force of the elastic film body 7 at each contact in the close contact (contact) portion acts in the centripetal direction toward the spherical center of the spherical seal surface 14.
That is, in any contact, a uniform elastic force (elastic restoring force) in the centripetal direction acts, thereby improving the adhesion (contact) property, and a reliable and high backflow prevention function can be exhibited in a wide area. It is like that.

図１に示すように、弾性膜体７内には、栓部材８（８ａ、８ｂ）のそれぞれに密着してシールを行う環状突起部１５（シールリング部）が設けられている。環状突起部１５は、第１栓部材８ａと密着する第１環状突起部１５ａと、第２栓部材８ｂと密着（接触）する第２環状突起部１５ｂからなる。環状突起部１５（１５ａ、１５ｂ）は、断面視で円弧状の曲面形状に形成されている。この環状突起部１５（１５ａ、１５ｂ）は、弾性膜体７の胴部７ｂ内面から内方突出状に形成されており、その全周に栓部材８（８ａ，８ｂ）が密着（接触）することでシールをしている。   As shown in FIG. 1, the elastic film body 7 is provided with an annular projection 15 (seal ring portion) that seals in close contact with each of the plug members 8 (8a, 8b). The annular protrusion 15 includes a first annular protrusion 15a that is in close contact with the first stopper member 8a, and a second annular protrusion 15b that is in close contact (contact) with the second stopper member 8b. The annular protrusion 15 (15a, 15b) is formed in an arcuate curved surface shape in a sectional view. The annular protrusions 15 (15a, 15b) are formed inwardly projecting from the inner surface of the body 7b of the elastic film body 7, and the plug members 8 (8a, 8b) are in close contact (contact) with the entire periphery thereof. I have a seal.

第１環状突起部１５ａの上側は、第１栓部材８ａの下側に密着（接触）してシールをするとともに第１栓部材８ａの位置を規制している。第１環状突起部１５ａの下側は、第２栓部材８ｂの上側と密着（接触）してシールしている。
第２環状突起部１５ｂは第２栓部材８ｂの下側に密着（接触）してシールをするとともに、第２栓部材８ｂの位置を規制している。第２栓部材８ｂは、第１環状突起部１５ａと第２環状突起部１５ｂに挟まれてシールされている。
このように、逆流防止口栓４は栓部材８（８ａ、８ｂ）と弾性膜体７の内面との密着（接触）と、栓部材８（８ａ、８ｂ）と環状突起部１５（１５ａ、１５ｂ）との密着（接触）によって複数箇所でシールをする多重シール構造となっており、これによって確実かつ十分な逆流防止機能を発揮している。 The upper side of the first annular protrusion 15a is in close contact (contact) with the lower side of the first plug member 8a to provide a seal and restrict the position of the first plug member 8a. The lower side of the first annular protrusion 15a is in close contact (contact) with the upper side of the second plug member 8b for sealing.
The second annular protrusion 15b is in close contact (contact) with the lower side of the second plug member 8b for sealing, and restricts the position of the second plug member 8b. The second plug member 8b is sealed between the first annular protrusion 15a and the second annular protrusion 15b.
As described above, the backflow prevention port plug 4 has the close contact (contact) between the plug member 8 (8a, 8b) and the inner surface of the elastic film body 7, the plug member 8 (8a, 8b), and the annular protrusion 15 (15a, 15b). ) And a multiple seal structure that seals at a plurality of locations by close contact (contact) with each other, thereby providing a reliable and sufficient backflow prevention function.

取付部材８９は、筒状に形成されており、その下部に弾性膜体７を容器口部３に取り付ける取付部８２が設けられ、弾性膜体７のつば部７ｃを挟んで弾性膜体７を容器口部に固定している。
取付部材８９の上部には、弾性膜体７内の第２栓部材８ｂの位置を規制する規制部２５が設けられている。この規制部２５は、取付部材８９の上端部から内方突出状に形成された複数（図例では４つ）の規制突起からなる（以下、規制部と規制突起に共通符号２５を用いる）。この規制突起２５は、取付部の上部でその周方向に等間隔で配置されている。 The attachment member 89 is formed in a cylindrical shape, and an attachment portion 82 for attaching the elastic film body 7 to the container mouth 3 is provided at the lower portion thereof, and the elastic film body 7 is sandwiched between the flange portions 7c of the elastic film body 7. It is fixed to the container mouth.
A restricting portion 25 for restricting the position of the second plug member 8 b in the elastic film body 7 is provided on the upper portion of the attachment member 89. The restricting portion 25 includes a plurality of (four in the illustrated example) restricting protrusions formed inwardly projecting from the upper end portion of the attachment member 89 (hereinafter, the common reference numeral 25 is used for the restricting portion and the restricting protrusion). The restricting projections 25 are arranged at equal intervals in the circumferential direction at the upper part of the attachment portion.

前記規制突起２５は、弾性膜体７の外面に当接しており、弾性膜体７を挟んで第２栓部材８ｂを掛止している。
容器１内の流動体が吐出口５から吐出されるまでの作用を説明する。
収縮可能な容器本体２を外部から押圧することによって内圧が上昇すると、流動体は第２栓部材８ｂを吐出口５側に押圧する。
このとき、第２栓部材８ｂは第２環状突起部１５ｂから離れ、第２環状突起部１５ｂによるシールが解除される。第２栓部材８ｂは、流動体によって、第１栓部材８ａ側に押されるが、取付部材８９の規制部２５によって第１栓部材８ａ側への移動が規制されることにより規制部２５よりも先端部７ａ側の弾性膜体７の胴部７ｂが伸び、流動体は、第２栓部材８ｂの球状シール面１４と弾性膜体７の内面とのシール、第２栓部材８ｂと第１環状突起部１５ａとのシール、そして第１栓部材８ａと第１環状突起部１５ａとのシールを解除して弾性膜体７の先端部７ａ側に流れ込む。 The restricting projection 25 is in contact with the outer surface of the elastic film body 7 and holds the second plug member 8b with the elastic film body 7 interposed therebetween.
The operation until the fluid in the container 1 is discharged from the discharge port 5 will be described.
When the internal pressure increases by pressing the shrinkable container body 2 from the outside, the fluid presses the second plug member 8b toward the discharge port 5 side.
At this time, the second plug member 8b is separated from the second annular protrusion 15b, and the seal by the second annular protrusion 15b is released. The second plug member 8b is pushed to the first plug member 8a side by the fluid, but the movement to the first plug member 8a side is regulated by the regulating part 25 of the mounting member 89, so that the regulation part 25 is more than the regulating part 25. The body 7b of the elastic membrane body 7 on the tip 7a side extends, and the fluid is a seal between the spherical sealing surface 14 of the second plug member 8b and the inner surface of the elastic membrane body 7, and the second plug member 8b and the first annular shape. The seal between the projecting portion 15a and the seal between the first plug member 8a and the first annular projecting portion 15a is released, and the elastic film body 7 flows into the distal end portion 7a side.

弾性膜体７の先端部７ａ側に流れ込んだ流動体は、第１栓部材８ａの移動を規制する前記弾性膜体７の厚肉部１２以外の部分を通り、これによって第１栓部材８ａの球状シール面１４と弾性膜体７の内面によるシールが解除され、流動体は球状シール面１４と薄肉部１３の間を通じて吐出口５から吐出される。
このとき薄肉部１３は、図３の１点鎖線Ａの状態から実線Ｂで示すように膨張し、また、厚肉部１２上端近傍での薄肉部１３では１点鎖線Ｃの状態から２点鎖線Ｄで示すように膨張変形し、薄肉部１３と球状シール面１４の間に吐出口５までの流通路が形成され、流動体はこの流通路を通じて吐出口５から吐出されることになる。 The fluid flowing into the distal end portion 7a side of the elastic film body 7 passes through the portion other than the thick portion 12 of the elastic film body 7 that restricts the movement of the first plug member 8a, and thereby the first plug member 8a. The sealing by the spherical sealing surface 14 and the inner surface of the elastic film body 7 is released, and the fluid is discharged from the discharge port 5 through the space between the spherical sealing surface 14 and the thin portion 13.
At this time, the thin-walled portion 13 expands from the state of the one-dot chain line A in FIG. 3 as indicated by the solid line B, and the thin-walled portion 13 near the upper end of the thick-walled portion 12 starts from the state of the one-dot chain line C. As shown by D, it expands and deforms, and a flow passage to the discharge port 5 is formed between the thin wall portion 13 and the spherical seal surface 14, and the fluid is discharged from the discharge port 5 through this flow passage.

上述のように流動体が薄肉部１３を流通しているとき、第１栓部材８ａは流動体によって吐出口５側に移動するように押圧されることになる。しかし、厚肉部１２が薄肉部１３よりも脹れにくく伸びにくくなっているため、第１栓部材８ａは、厚肉部１２によって吐出口５側への移動が規制され、これによって第１栓部材８ａが弾性膜体７の内側の吐出口５を塞ぐことなく、流動体の流通路を確保することができるようになっている。
したがって、弾性膜体７に厚肉部１２を設けたことによって、使用時に第１栓部材８ａが吐出口５を内側から塞ぐことがなくなり、不使用時には吐出口５を内側から塞ぐように第１栓部材８ａと弾性膜体７とを密着（接触）させてシールすることができる。すなわち、弾性膜体７の胴部７ｂの中途部から先端部７ａにわたって密着（接触）させて、第１栓部材８ａと吐出口５との間に空隙が生じないようにでき、流動体が第１栓部材８ａと吐出口５との間に残留することもなく、容器１内の流動体を常に衛生的で新鮮な（酸化、汚染等しない）ままで長期にわたり保存・使用することができるのである。 As described above, when the fluid is flowing through the thin wall portion 13, the first plug member 8a is pressed by the fluid so as to move to the discharge port 5 side. However, since the thick portion 12 is less likely to swell and extend than the thin portion 13, the movement of the first plug member 8 a toward the discharge port 5 is restricted by the thick portion 12, thereby the first plug. The member 8a can secure the flow path of the fluid without blocking the discharge port 5 inside the elastic film body 7.
Therefore, by providing the thick portion 12 in the elastic film body 7, the first stopper member 8a does not block the discharge port 5 from the inside during use, and the first plug member 5 closes the discharge port 5 from the inside when not in use. The plug member 8a and the elastic film body 7 can be sealed by being brought into close contact (contact). That is, the elastic film body 7 can be brought into close contact (contact) from the middle part of the body part 7b to the tip part 7a so as not to generate a gap between the first plug member 8a and the discharge port 5, and the fluid can be Since the fluid in the container 1 can be stored and used for a long period of time without sacrificing between the 1-plug member 8a and the discharge port 5 while being always hygienic and fresh (not oxidized or contaminated). is there.

しかも、第１栓部材８ａを弾性膜体７の胴部７ｂからドーム状の先端部７ａにわたって密着（接触）させることができ、より大きなシール面積（栓部材８の表面積の半分以上のシール面積）を確保できる。さらに第１栓部材８ａによるシールに加えて第２栓部材８ｂによるシールもあり、これによってシール性能を大幅に向上することができるのである。
図４の第２実施形態では、弾性膜体７内に第１環状突起部１５ａが設けられておらず、弾性膜体７内には、栓部材８（８ａ、８ｂ）の位置を規制する規制部２７が設けられており、また、取付部材６９には、第１実施形態で説明した規制部２５は設けられておらず、これらの点が第１実施形態と異なる。 In addition, the first plug member 8a can be brought into close contact (contact) from the body portion 7b of the elastic film body 7 to the dome-shaped tip portion 7a, so that a larger seal area (a seal area of more than half of the surface area of the plug member 8). Can be secured. Further, in addition to the seal by the first plug member 8a, there is also a seal by the second plug member 8b, which can greatly improve the sealing performance.
In the second embodiment of FIG. 4, the first annular protrusion 15 a is not provided in the elastic film body 7, and the restriction for restricting the position of the plug member 8 (8 a, 8 b) is provided in the elastic film body 7. A portion 27 is provided, and the attachment member 69 is not provided with the restricting portion 25 described in the first embodiment, and these points are different from the first embodiment.

弾性膜体７に設けられた規制部２７は、弾性膜体７の内面から内方突出状に形成された複数（図例では４つ）の規制突起からなる（以下、弾性膜体７の規制部と規制突起に共通符号２７を用いる）。各規制突起２７は、弾性膜体７の内周方向に沿って等間隔に配置されている。その他の点は、第１実施形態と同様の構成であり、同様の作用効果を生ずる。
図５、図６の第３実施形態では、厚肉部１２の形状や、第２栓部材８ｂに対応する厚肉部３１、薄肉部３２を弾性膜体７に形成した点、第１環状突起部１５ａが設けられていない点、および取付部材９９の形状が第１実施形態と異なる。 The restricting portion 27 provided on the elastic film body 7 is composed of a plurality of (four in the illustrated example) restricting protrusions formed inwardly projecting from the inner surface of the elastic film body 7 (hereinafter referred to as the restriction of the elastic film body 7). The common reference numeral 27 is used for the part and the restricting projection). The restricting protrusions 27 are arranged at equal intervals along the inner circumferential direction of the elastic film body 7. Other points are the same as those in the first embodiment, and the same effects are produced.
In the third embodiment of FIGS. 5 and 6, the shape of the thick portion 12, the point that the thick portion 31 and the thin portion 32 corresponding to the second plug member 8 b are formed on the elastic film body 7, the first annular protrusion The point in which the part 15a is not provided and the shape of the attachment member 99 differ from 1st Embodiment.

第３実施形態では、厚肉部１２は周方向の長さがながい横長形状とされており、厚肉部１２の長手方向の長さＬ１と周方向の長さＬ２の比Ｌ１／Ｌ２は１よりも小さくなっている。また、厚肉部１２の周方向の長さ（Ｌ２）と、厚肉部１２間の間隔、すなわち、薄肉部１３の周方向長さとの比は、３：１または４：１程度とされている。
第１実施形態では、第１栓部材８ａに対応して弾性膜体７の先端部７ａに厚肉部１２と薄肉部１３を設けて第１栓部材８ａを規制していたが、この第３実施形態のように、弾性膜体７の胴部７ｂの中途部に複数（図例では４つ）の厚肉部３１と薄肉部３２を周方向に交互に形成し、第２栓部材８ｂの位置を規制することもできる。 In the third embodiment, the thick portion 12 has a laterally long shape with no circumferential length, and the ratio L1 / L2 between the longitudinal length L1 and the circumferential length L2 of the thick portion 12 is 1. Is smaller than Further, the ratio between the circumferential length (L2) of the thick portion 12 and the interval between the thick portions 12, that is, the circumferential length of the thin portion 13, is about 3: 1 or 4: 1. Yes.
In the first embodiment, the first plug member 8a is regulated by providing the thick portion 12 and the thin portion 13 at the distal end portion 7a of the elastic film body 7 corresponding to the first plug member 8a. As in the embodiment, a plurality of (four in the illustrated example) thick portions 31 and thin portions 32 are alternately formed in the circumferential direction in the middle portion of the body portion 7b of the elastic film body 7, and the second plug member 8b The position can also be restricted.

取付部材９９の上部には、第１実施形態で説明した規制突起２５が設けられていない。取付部材９９の上部は、図５に示すように先細り状に形成され、その口部３３の周縁が弾性膜体７の中途部を全周にわたって覆うようになっており、異物等が弾性膜体７と取付部材９９の間に入り込むのを防止している。図５に示すように、前記厚肉部３１は、取付部材９９の口部３３の周縁に当接した状態になっている。その他の点は、第１実施形態と同様の構成であり、同様の作用効果を生じる。
図７の第４実施形態では、第２栓部材８ｂと第１環状突起部１５ａとが密着しておらず、この点が第１実施形態と異なる。このように、第２栓部材８ｂは、第１環状突起部１５ａから離して配置してもよく、弾性膜体７を長く形成したい場合等に有利である。その他の点は第１実施形態とほぼ同様の構成であり、同様の作用効果を奏する。 The restriction protrusion 25 described in the first embodiment is not provided on the upper portion of the attachment member 99. The upper part of the attachment member 99 is formed in a tapered shape as shown in FIG. 5, and the peripheral edge of the mouth part 33 covers the middle part of the elastic film body 7 over the entire circumference. 7 and the attachment member 99 are prevented from entering. As shown in FIG. 5, the thick portion 31 is in contact with the peripheral edge of the mouth portion 33 of the attachment member 99. Other points are the same as those in the first embodiment, and the same effects are produced.
In 4th Embodiment of FIG. 7, the 2nd stopper member 8b and the 1st cyclic | annular protrusion 15a are not closely_contact | adhering, and this point differs from 1st Embodiment. Thus, the second plug member 8b may be arranged away from the first annular protrusion 15a, which is advantageous when it is desired to form the elastic film body 7 longer. The other points are substantially the same as those in the first embodiment, and have the same effects.

なお、本発明は上記の実施形態に限らず、以下のように種々の変形が可能である。
すなわち、厚肉部１２の数は１、２または４以上であってもよい。厚肉部１２の最大肉厚ｔ１と薄肉部１３の肉厚ｔ２との比（ｔ１／ｔ２）は、弾性膜体７の材質の違いに応じて、２または４より大きくしてもよい。厚肉部１２の長手方向の長さＬ１と周方向の長さＬ２の比Ｌ１／Ｌ２は、３以上に設定してもよい。また、この比を１以下とし、すなわちＬ１≦Ｌ２の関係として薄肉部１３ａ（間隔Ｙ）を広く設けてもよい。弾性膜体７の吐出口５の周囲に設けられた液溜部１１は円筒状以外にも角柱状その他の筒形状としてもよい。上述した各実施形態では、厚肉部１２はドーム状の先端部７ａの周方向に沿って等間隔に配設していたが、厚肉部１２の間隔は等間隔に限らず、間隔を変えて設けてもよい。吐出口５は弾性膜体７に複数形成してもよく、ダックビル状等に限らず、丸孔等にしてもよい。また、吐出口５は、ドーム状の先端部７ａの突端に設けられているが、この突端から位置をずらして形成するようにしてもよい。栓部材８（８ａ、８ｂ）は球状に限らず、ラグビーボール状、楕円体等の球状シール面を形成可能なものでもよく、また、栓部材８（８ａ、８ｂ）の材料は、弾性樹脂（熱可塑性エラストマー）、または抗菌用に銀またはチタン等の金属を用いてもよく、これらの金属を栓部材８（８ａ、８ｂ）にメッキ、蒸着等を行ったり、これらの金属を樹脂に粉末混合してもよい。 In addition, this invention is not restricted to said embodiment, A various deformation | transformation is possible as follows.
That is, the number of thick portions 12 may be 1, 2 or 4 or more. The ratio (t1 / t2) between the maximum thickness t1 of the thick part 12 and the thickness t2 of the thin part 13 may be greater than 2 or 4 depending on the material of the elastic film body 7. The ratio L1 / L2 between the length L1 in the longitudinal direction and the length L2 in the circumferential direction of the thick portion 12 may be set to 3 or more. Further, this ratio may be set to 1 or less, that is, the thin portion 13a (interval Y) may be provided widely as a relationship of L1 ≦ L2. The liquid reservoir 11 provided around the discharge port 5 of the elastic film body 7 may have a prismatic shape or other cylindrical shape in addition to the cylindrical shape. In each of the above-described embodiments, the thick portions 12 are arranged at equal intervals along the circumferential direction of the dome-shaped tip portion 7a. However, the intervals of the thick portions 12 are not limited to equal intervals, and the intervals are changed. May be provided. A plurality of discharge ports 5 may be formed in the elastic film body 7, not limited to a duckbill shape or the like, but may be a round hole or the like. Moreover, although the discharge port 5 is provided at the protruding end of the dome-shaped tip portion 7a, it may be formed by shifting the position from the protruding end. The plug member 8 (8a, 8b) is not limited to a spherical shape, and may be a rugby ball-like or ellipsoidal shape capable of forming a spherical seal surface. The material of the plug member 8 (8a, 8b) is an elastic resin ( Thermoplastic elastomers) or metals such as silver or titanium may be used for antibacterial purposes. These metals are plated on the plug member 8 (8a, 8b), vapor deposited, etc., or these metals are mixed into a resin powder. May be.

上述した実施形態では、栓部材８（８ａ、８ｂ）が２個の場合を説明したが、第１栓部材８ａと第２栓部材８ｂの間に、さらに球状の栓部材８を設けて、栓部材８を３個以上の複数にしてもよい。この場合に、弾性膜体７内に環状突起部１５（１５ａ、１５ｂ）を形成せずに、複数の栓部材８の球状シール面１４と弾性膜体７との密着のみによるシール構造を採用してもよい。又、シールを部分的に強めたり弱めたりする調整は、弾性膜体７の伸びや硬度を適宜選択して変更してもよい。
弾性膜体７には、第１実施形態で説明した環状カバー部２１と、第３実施形態で説明した厚肉部３１の両方を形成してもよい。 In the embodiment described above, the case where there are two plug members 8 (8a, 8b) has been described. However, a spherical plug member 8 is further provided between the first plug member 8a and the second plug member 8b to Three or more members 8 may be provided. In this case, a sealing structure in which only the spherical sealing surfaces 14 of the plurality of plug members 8 and the elastic film body 7 are in close contact with each other is employed without forming the annular protrusions 15 (15a, 15b) in the elastic film body 7. May be. Further, the adjustment to partially strengthen or weaken the seal may be changed by appropriately selecting the elongation or hardness of the elastic film body 7.
You may form both the cyclic | annular cover part 21 demonstrated in 1st Embodiment in the elastic film body 7, and the thick part 31 demonstrated in 3rd Embodiment.

本発明の第１実施形態を示す容器の縦断面図である。It is a longitudinal cross-sectional view of the container which shows 1st Embodiment of this invention. 逆流防止口栓の平面図である。It is a top view of a backflow prevention plug. 図１のＺ−Ｚ線で切断した場合の弾性膜体の展開図である。It is an expanded view of the elastic film body at the time of cut | disconnecting by the ZZ line | wire of FIG. 本発明の第２実施形態を示す容器の縦断面図である。It is a longitudinal cross-sectional view of the container which shows 2nd Embodiment of this invention. 本発明の第３実施形態を示す容器の縦断面図である。It is a longitudinal cross-sectional view of the container which shows 3rd Embodiment of this invention. 逆流防止口栓の平面図である。It is a top view of a backflow prevention plug. 本発明の第４実施形態を示す容器の縦断面図である。It is a longitudinal cross-sectional view of the container which shows 4th Embodiment of this invention.

符号の説明Explanation of symbols

３ 容器口部
４ 逆流防止口栓
５ 吐出口
７ 弾性膜体
８ 栓部材
８ａ 第１栓部材
８ｂ 第２栓部材
１２ 厚肉部
１３ 薄肉部
１４ 球状シール面
１５ 環状突起部
８９ 取付部材 DESCRIPTION OF SYMBOLS 3 Container port part 4 Backflow prevention port plug 5 Discharge port 7 Elastic film body 8 Plug member 8a 1st plug member 8b 2nd plug member 12 Thick part 13 Thin part 14 Spherical sealing surface 15 Annular projection part 89 Mounting member

Claims (7)

流動体を吐出する吐出口（５）を有していて容器口部（３）に設けられる弾性膜体（７）と、弾性膜体（７）内に配置されていて流動体の流出を閉栓可能な栓部材（８）とを備えた逆流防止口栓（４）において、
弾性膜体（７）の吐出口（５）側の周囲には厚肉部（１２）と薄肉部（１３）とが周方向交互に設けられ、
前記厚肉部（１２）は、前記弾性膜体（７）の外面から外方に膨出形成された突起状とされており、
前記栓部材（８）は、弾性膜体（７）が弾力的に密着する球状シール面（１４）を有しており、
弾性膜体（７）内には複数の栓部材（８）が配設されている
ことを特徴とする逆流防止口栓。 An elastic film body (7) having a discharge port (5) for discharging the fluid and provided in the container mouth portion (3), and disposed in the elastic film body (7) for closing the outflow of the fluid In the backflow prevention plug (4) provided with a possible plug member (8),
Around the discharge port (5) side of the elastic film body (7), thick portions (12) and thin portions (13) are provided alternately in the circumferential direction,
The thick part (12) is formed in a protruding shape bulging outward from the outer surface of the elastic film body (7),
The plug member (8) has a spherical sealing surface (14) to which the elastic film body (7) is elastically adhered,
A backflow prevention stopper plug, wherein a plurality of plug members (8) are disposed in the elastic membrane body (7). 流動体を吐出する吐出口（５）を有していて容器口部（３）に設けられる弾性膜体（７）と、弾性膜体（７）内に配置されていて流動体の流出を閉栓可能な栓部材（８）とを備えた逆流防止口栓（４）において、
前記弾性膜体（７）は一端側に先端部（７ａ）を有し、
前記吐出口（５）は前記先端部（７ａ）の突端に設けられ、
前記弾性膜体（７）の先端部（７ａ）には、厚肉部（１２）と薄肉部（１３）が周方向に交互に設けられており、
前記厚肉部（１２）は、前記弾性膜体（７）の外面から外方に膨出形成された突起状とされており、
栓部材（８）は、弾性膜体（７）が弾力的に密着する球状シール面（１４）を有する第１栓部材（８ａ）および第２栓部材（８ｂ）からなり、
第１栓部材（８ａ）は、前記弾性膜体（７）の先端部（７ａ）内に配設され、
第２栓部材（８ｂ）は、弾性膜体（７）内で第１栓部材（８ａ）よりも容器口部（３）寄りに配置されており、
前記第１栓部材（８ａ）は球状とされていて前記先端部（７ａ）の内面に密着して配設されており、
前記厚肉部（１２）は、前記第１栓部材（８ａ）の球状シール面（１４）における複数の法線の交点と前記吐出口（５）との間で先端部（７ａ）に設けられている
ことを特徴とする逆流防止口栓。 An elastic film body (7) having a discharge port (5) for discharging the fluid and provided in the container mouth portion (3), and disposed in the elastic film body (7) to plug out the fluid. In the backflow prevention plug (4) provided with a possible plug member (8),
The elastic membrane body (7) has a tip (7a) on one end side,
The discharge port (5) is provided at the protruding end of the tip (7a),
Thick portions (12) and thin portions (13) are alternately provided in the circumferential direction at the tip (7a) of the elastic membrane (7),
The thick part (12) is formed in a protruding shape bulging outward from the outer surface of the elastic film body (7),
The plug member (8) comprises a first plug member (8a) and a second plug member (8b) having a spherical sealing surface (14) to which the elastic membrane body (7) is elastically adhered,
The first plug member (8a) is disposed in the distal end portion (7a) of the elastic membrane body (7),
The second stopper member (8b) is disposed closer to the container mouth (3) than the first stopper member (8a) in the elastic membrane body (7) ,
The first plug member (8a) is spherical and is disposed in close contact with the inner surface of the tip (7a);
The thick portion (12) is provided at the tip (7a) between the intersection of a plurality of normal lines on the spherical sealing surface (14) of the first plug member (8a) and the discharge port (5). backflow preventing mouth plug, characterized by that. 前記厚肉部（１２）は、
肉厚部における肉厚が最大になる部分の表面と前記第１栓部材（８ａ）の球心とを結ぶ線が、前記吐出口（５）中心と前記第１栓部材（８ａ）の球心とを結ぶ線に対してなす角度θが、３０゜＜θ＜９０゜となるように構成された
ことを特徴とする請求項２に記載の逆流防止口栓。 The thick part (12)
A line connecting the surface of the thickest portion where the thickness is maximum and the spherical center of the first plug member (8a) is the center of the discharge port (5) and the spherical center of the first plug member (8a). The backflow prevention plug according to claim 2 , wherein an angle θ formed with respect to a line connecting the two is configured such that 30 ° <θ <90 ° . 弾性膜体（７）は、
前記厚肉部（１２）の最大肉厚ｔ１と前記薄肉部（１３）の肉厚ｔ２との比（ｔ１／ｔ２）が２、３または４である
ことを特徴とする請求項１から請求項３のいずれか１項に記載の逆流防止口栓。 The elastic membrane (7)
Claim from claim 1, wherein the ratio of the thickness t2 of the maximum thickness t1 and the thin portion of the thick portion (12) (13) (t1 / t2) is 2, 3 or 4 4. The backflow prevention plug according to any one of 3 above. 流動体を吐出する吐出口（５）を有していて容器口部（３）に設けられる弾性膜体（７）と、弾性膜体（７）内に配置されていて流動体の流出を閉栓可能な栓部材（８）とを備えた逆流防止口栓（４）において、
前記弾性膜体（７）は一端側に略半球状の先端部（７ａ）を有し、前記吐出口（５）は前記先端部（７ａ）の突端に設けられ、
前記弾性膜体（７）の先端部（７ａ）には、厚肉部（１２）と薄肉部（１３）が周方向に交互に設けられており、
前記厚肉部（１２）は、前記弾性膜体（７）の外面から外方に膨出形成された突起状とされており、
栓部材（８）は、弾性膜体（７）が弾力的に密着する球状シール面（１４）を有する第１栓部材（８ａ）および第２栓部材（８ｂ）からなり、
第１栓部材（８ａ）は、前記弾性膜体（７）の先端部（７ａ）内に配設され、
第２栓部材（８ｂ）は、弾性膜体（７）内で第１栓部材（８ａ）よりも容器口部（３）寄りに配置されている
ことを特徴とする逆流防止口栓。 An elastic film body (7) having a discharge port (5) for discharging the fluid and provided in the container mouth portion (3), and disposed in the elastic film body (7) to plug out the fluid. In the backflow prevention plug (4) provided with a possible plug member (8),
The elastic film body (7) has a substantially hemispherical tip (7a) on one end side, and the discharge port (5) is provided at the tip of the tip (7a),
Thick portions (12) and thin portions (13) are alternately provided in the circumferential direction at the tip (7a) of the elastic membrane (7),
The thick part (12) is formed in a protruding shape bulging outward from the outer surface of the elastic film body (7),
The plug member (8) comprises a first plug member (8a) and a second plug member (8b) having a spherical sealing surface (14) to which the elastic membrane body (7) is elastically adhered,
The first plug member (8a) is disposed in the distal end portion (7a) of the elastic membrane body (7),
The second plug member (8b), the elastic membrane member (7) in a container opening than the first plug member (8a) (3) backflow preventing mouth plug, characterized in that arranged in the closer. 前記弾性膜体（７）内には第１栓部材（８ａ）または第２栓部材（８ｂ）と密着してシールを行う環状突起部（１５）が設けられているIn the elastic film body (7), there is provided an annular projection (15) that seals in close contact with the first plug member (8a) or the second plug member (8b).
ことを特徴とする請求項２または５に記載の逆流防止口栓。The backflow prevention stopper plug according to claim 2 or 5, wherein 請求項１から請求項６のいずれか１項に記載の逆流防止口栓（４）を容器口部（３）に備えた
ことを特徴とする容器。 A container comprising the container mouth portion (3) provided with the backflow prevention stopper plug (4) according to any one of claims 1 to 6 .
JP2004122149A 2004-02-05 2004-04-16 Backflow prevention stopper and container Expired - Fee Related JP3961507B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2004122149A JP3961507B2 (en) 2004-04-16 2004-04-16 Backflow prevention stopper and container
EP04030363A EP1561699B1 (en) 2004-02-05 2004-12-21 Backflow preventing mouth plug and container fitted with it
DE602004024498T DE602004024498D1 (en) 2004-02-05 2004-12-21 Backflow preventing cap and container equipped therewith
US11/024,776 US7490744B2 (en) 2004-02-05 2004-12-30 Backflow preventing mouth plug and container
CNB2005100062174A CN100542906C (en) 2004-02-05 2005-01-21 Backflow preventing mouth plug and container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004122149A JP3961507B2 (en) 2004-04-16 2004-04-16 Backflow prevention stopper and container

Publications (2)

Publication Number Publication Date
JP2005306394A JP2005306394A (en) 2005-11-04
JP3961507B2 true JP3961507B2 (en) 2007-08-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6084504B2 (en) * 2013-03-29 2017-02-22 株式会社吉野工業所 Dispensing container
JP6853609B2 (en) * 2017-10-30 2021-03-31 政安 宮崎 Check valve

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