JP3492600B2

JP3492600B2 - Backflow prevention container

Info

Publication number: JP3492600B2
Application number: JP2000187767A
Authority: JP
Inventors: 健二池本
Original assignee: Kitano Co Ltd
Current assignee: Kitano Co Ltd
Priority date: 2000-06-22
Filing date: 2000-06-22
Publication date: 2004-02-03
Anticipated expiration: 2020-06-22
Also published as: JP2002002755A

Description

【発明の詳細な説明】【０００１】【発明の属する技術分野】この発明は、液体の食品や化
粧品その他の流動性材料を収容し、収容物を押し出した
後空気の流入を阻止可能な中空状の逆流防止容器に関す
る。【０００２】【従来の技術】従来、練りわさび等の調味料やクリーム
状の化粧品を収容するチューブ式の容器があった。この
ような容器は、容器本体の側面を押して内容物の圧力を
高め、容器本体の押出口から内容物を押し出すものであ
った。しかし、内容物を出した後、容器本体は押されて
生じた変形を元に戻す力が働き、容器内が負圧になり、
押出口から空気が流れ込むものであった。このような容
器本体内にたまった空気に内容物が接触すると、内容物
の酸化や空気中の菌による腐敗をおこすことがあった。
特に、近年は防腐剤が含まれていない商品が増えてお
り、腐敗や変質を起こしやすく、空気が入らないチュー
ブ式の容器が求められていた。【０００３】空気の流入を防ぐ容器として、例えば実開
昭５７−１４３１４７号公報に開示されている逆流防止
チューブがあった。この逆流防止チューブは容器本体の
押出口にこの押出口を塞ぐ天井壁が設けられ、この天井
壁には複数の透孔が形成されていた。押出口の先端に
は、先端に小さい孔が形成されている円錐形のノズルが
取り付けられ、ノズルの内側には、上記天井壁に対して
平行な弁シートが設けられていた。そして、上記弁シー
トは、天井壁に対して直角方向に移動可能に設けられ、
弁シートが天井壁に接しているとき透孔は弁シートによ
り塞がれ、弁シートが天井壁から離れているときには、
流出溝を経て透孔から内容物が流出可能なものであっ
た。【０００４】この逆流防止チューブの使用方法は、容器
本体の側面を押すと内容物の圧力が高まって天井壁から
弁シートを押し上げ、天井壁の透孔が解放され流出溝を
経てノズルから内容物が流れ出る。内容物を取り出した
後、容器本体の側面の押圧をやめると、容器本体の変形
を元に戻す力が働き容器本体側が負圧となる。すると、
弁シートが天井壁側に引き戻され天井壁の透孔を閉鎖
し、空気が容器本体の中に流れることを防ぐ。【０００５】その他に、空気の流入を防ぐ容器として実
公昭５８−２１３９９号公報に開示されているチューブ
があった。このチューブは、容器本体の押出口に、この
押出口を塞ぐとともに中央部に透孔が形成された蓋部材
が設けられていた。押出口には、さらに、容器本体の内
側と連通した透孔を有するシリンダ部と、このシリンダ
部の内側に設けられたピストンを備え、ピストンは容器
本体の外側方向へ向かってバネで付勢されていた。さら
に、ピストンには、容器本体の外側へ向かって突出する
円錐形の突起が形成され、蓋部材の透孔に嵌合してこの
透孔を塞いでいた。【０００６】このチューブの使用方法は、容器本体の側
面を押すと内容物の圧力が高まり、シリンダ部の透孔か
ら内容物がシリンダ部内へ流れ出し、蓋部材とシリンダ
の間に充満する。そして充満した内容物の圧力によりピ
ストンがシリンダ部奥に押し下げられ、ピストンの突起
が蓋部材の透孔から引き抜かれる。これにより取出口は
開口され、内容物が押し出される。内容物を取り出した
後、容器本体の側面の押圧をやめると、蓋部材とシリン
ダ部の間に充満した内容物の圧力が減少し、ピストン
は、バネの付勢力でシリンダ部の外側へ向かって移動
し、蓋部材の透孔を塞ぐ。これにより空気が容器本体の
中に流れることを防ぐ。【０００７】【発明が解決しようとする課題】上記の実開昭５７−１
４３１４７号公報に開示されている逆流防止チューブの
場合、弁シートの外側の、ノズルの内側に内容物が残
り、この内容物はノズルから入る空気に常に接触し、腐
敗や変質するおそれがあった。また、上記の実公昭５８
−２１３９９号公報に開示されているチューブの場合、
構造が複雑でコストが高いものであった。また、シリン
ダ部とピストンの間に内容物等が入るおそれがあり、誤
作動や不具合を生じるおそれがあった。【０００８】この発明は上記従来の問題点に鑑みてなさ
れたものであり、簡単な構造で確実に容器本体への空気
の進入を防ぎ、内容物の品質を保つことができる逆流防
止容器を提供することを目的とする。【０００９】【課題を解決するための手段】この発明は、樹脂等によ
り形成され弾力性を有し一端部に押出口が形成された容
器本体と、上記押出口を塞いで設けられた中栓と、上記
中栓の中心に設けられ上記押出口から円錐状に外側へ突
出する中栓突起と、上記中栓に設けられ上記容器本体の
内側と外側を連通する透孔と、弾力性を有し上記押出口
の周縁部と上記中栓突起の側面に密着するノズル部材と
が設けられ、上記ノズル部材には、円錐状に形成された
カバー部が設けられ、このカバー部の内周面の一部が上
記中栓突起の側面に一周して密着し、上記カバー部の途
中には、その弾性変形を容易にするための薄肉部が形成
され、上記カバー部の薄肉部は、上記中栓との接触部分
よりも上記容器本体に近い部分で、上記容器本体側に向
かって断面がＶ字形にくぼむ屈曲部として一周して設け
られ、上記ノズル部材の注出口は、上記屈曲部の中央に
設けられている逆流防止容器である。【００１０】この発明の逆流防止容器は、容器本体側面
を押圧すると、容器本体の内容物の圧力が高まり、中栓
突起の透孔から内容物が流れ出し、中栓とノズル部材の
間に充満する。そして、充満した内容物の圧力によりノ
ズル部材が外側に弾性変形し、中栓突起とノズル部材の
間に隙間が生じ、この隙間から内容物が流れ出しノズル
部材の透孔から押し出される。内容物を取り出した後、
容器本体の押圧をやめると、容器本体には押されて生じ
た変形を元に戻す力が働き、内容物側は負圧になり、ノ
ズル部材の変形が復元して中栓突起に再び密着し、空気
の流入を防ぐものである。【００１１】【発明の実施の形態】以下、この発明の実施形態につい
て図面に基づいて説明する。図１、図２はこの発明の第
一実施形態の逆流防止容器１０を示すもので、この実施
形態の逆流防止容器１０は、適度な弾力性を有する合成
樹脂製の容器本体１２を有し、容器本体１２の一端部に
は、円筒状の押出口１４が一体に形成され、押出口１４
の側面には雄ねじ１６が形成されている。【００１２】押出口１４の周縁部１４ａには、やや固い
合成樹脂製の中栓１８が嵌合されて取り付けられてい
る。中栓１８は、押出口１４の内側に嵌合される円筒状
の取付部２０が設けられ、取付部２０の上端面２２には
取付部２０を閉鎖し外側へ円錐状に突出する中栓突起２
４が設けられている。中栓突起２４の、上端面２２に隣
接する基端部には、基端部円周に沿って互いに等間隔に
４個の透孔２６が形成され、中栓１８の内側と外側を連
通している。中栓１８の取付部２０側周面には、容器本
体１２の押出口１４周縁部１４ａ付近に、後述するノズ
ル部材３２が係止される係止溝２８が設けられている。
係止溝２８は、押出口１４周縁部１４ａに対して平行
に、取付部２０を一周して形成されている。そして上端
面２２の周縁部には上方に突出する突出壁３０が一周し
て形成されている。【００１３】中栓１８の、容器本体１２の押出口１４か
ら外側に突出している部分に、柔軟な樹脂やゴム等の弾
性材料で作られたノズル部材３２が取り付けられてい
る。ノズル部材３２は、円錐状に形成されたカバー部３
４が設けられ、カバー部３４の内周面の一部は、中栓１
８の中栓突起２４の側面に一周して密着している。そし
て、カバー部３４先端に、透孔である注出口３６が設け
られている。【００１４】ノズル部材３２の押出口１４側の周縁部内
側には、中栓１８の係止溝２８に嵌合される係止突起３
８が、内側に一周して突出している。そしてカバー部３
４の途中には、弾性変形を容易にするために薄肉部４０
が形成されている。【００１５】次に、この実施形態の逆流防止容器１０の
使用方法について説明する。容器本体１２に練りわさび
等の調味料やクリーム状の化粧品を収容し、容器本体１
２の押出口１４に中栓１８とノズル部材３２を取り付
け、さらにこれらを覆う図示しない外蓋を雄ねじ１６に
螺合させて取り付ける。【００１６】そして、内容物を取り出すときは、容器本
体１２の側面を押圧する。これにより、容器本体１２の
内容物の圧力が高まり、中栓１８の透孔２６から内容物
が流れ出し、中栓１８とノズル部材３２のカバー部３４
で囲まれた空間に内容物が充満する。そして、充満した
内容物の圧力により、図２に示すようにノズル部材３２
の薄肉部４０付近が弾性変形しカバー部３４が外側に広
げられる。そして、カバー部３４と中栓突起２４の間に
隙間が生じ、この隙間から内容物が流れ出してノズル部
材３２の注出口３６から押し出される。【００１７】逆流防止容器１０から任意の量の内容物を
取り出した後、容器本体１２の押圧をやめると、容器本
体１２には押されて生じた変形を元に戻す力が働き、容
器本体１２内は負圧になる。すると、ノズル部材３２の
変形が復元して中栓突起に再び密着し、空気の流入や、
一度外気に触れた内容物の逆流を防ぐ。【００１８】この実施形態の逆流防止容器１０は、構造
が簡単で、生産性に優れている上、内容物を取り出した
後に容器本体１２内に空気を吸い込んだり、一度外気に
触れた内容物が逆流したりすることがない。これによ
り、空気に接触して内容物が変質したり腐敗することが
なく、品質を一定に保持することができる。また、内容
物に混入する防腐剤の添加量を削減することができる。
さらに、ノズル部材３２は柔軟な弾性体で作られている
ため、高い気密性を保持することができ、空気の進入や
内容物の逆流を確実に止めることができ、また内容物が
低粘度の液体の場合も漏れることがない。また、容器側
面１２を押圧したときは、内容物の圧力で容易に弾性変
形し、弱い力で楽に内容物を押し出すことができる。ノ
ズル部材３２のカバー部３４と、中栓１８の中栓突起２
４は、ノズル部材３２の注出口３６付近で密着している
ため、カバー部３４の内側に滞留している内容物は空気
に接触せず変質しない。【００１９】また、内容物が少なくなった場合に容器本
体１２内に空気を入れてふくらました状態で逆さに保管
し容器本体１２の押出口１４に内容物を集めたいとき
は、ノズル部材３２のカバー部３４を摘んだり、引っ張
り上げて弾性変形させ、中栓１８の中栓突起２４との間
に隙間を作ることにより、空気を逆流させることができ
る。【００２０】次にこの発明の第二実施形態について図
３，図４に基づいて説明する。ここで、上述の実施の形
態と同様の部材は同一の符号を付して説明を省略する。
この実施形態の逆流防止容器４２は、中栓１８の、容器
本体１２の押出口１４から外側に突出している部分に、
上記と同様の柔軟な弾性材料で作られたノズル部材４４
が取り付けられている。ノズル部材４４は、円錐状に形
成されたカバー部３４が設けられ、カバー部３４の内周
面の一部は、中栓１８の中栓突起２４の側面に一周して
密着している。カバ−部３４の側周面の、中栓１８との
接触部分よりも容器本体１２に近い部分に、容器本体１
２側に向かって断面がＶ字形にくぼむ屈曲部４８が一周
して設けられている。屈曲部４８は、容易に弾性変形さ
せるために薄肉に形成されている。【００２１】この実施形態の逆流防止容器４２の使用方
法は、上記実施形態と同様であり、内容物を取り出すと
きは、容器本体１２の側面を押圧し、これにより容器本
体１２の内容物の圧力が高まり、中栓１８の透孔２６か
ら内容物が流れ出し、中栓１８とノズル部材４４のカバ
ー部３４で囲まれた空間に内容物が充満する。そして、
充満した内容物の圧力により、図４に示すようにノズル
部材４４の湾曲薄肉部４８の湾曲が伸びてカバー部３４
が中栓１８の中栓突起２４から離れる。そして、カバー
部３４と中栓突起２４の間に隙間が生じ、この隙間から
内容物が流れ出してノズル部材４４の注出口３６から押
し出される。【００２２】この実施形態の逆流防止容器４２によれ
ば、上記の実施形態と同様の効果を有するものである。
そして、ノズル部材４４に屈曲部４８が形成され、内容
物を押し出すときの開口面積を大きく取ることができ、
粘度の高い内容物も容易に注出することができる。【００２３】次にこの発明の第三実施形態について図５
に基づいて説明する。ここで、上述の実施形態と同様の
部材は同一の符号を付して説明を省略する。この実施形
態の逆流防止容器５０は、上記中栓が容器本体１２と一
体に形成されたもので、容器本体１２の押出口１４周縁
部１４ａに、押出口１４の突出方向に対して平行に突出
する筒状の小径部５２が形成されている。小径部５２の
周側面には係止溝５４が一周して形成され、また小径部
５２の上端面５６には、小径部５２を閉鎖し外側へ円錐
状に突出する中栓突起５８が設けられている。中栓突起
５８の、上端面５６に隣接する基端部には、基端部円周
に沿って互いに等間隔に４個の透孔６０が形成され、容
器本体１２の内側と外側を連通している。【００２４】小径部５２の中栓突起５８には柔軟な弾性
材料で作られたノズル部材３２が取り付けられている。
ノズル部材４４は、円錐状に形成されたカバー部３４が
設けられ、カバー部３４の内周面の一部は、突起５８側
面に一周して密着している。ノズル部４４の押出口１４
側の周縁部内側には、小径部５２の係止溝５４に嵌合さ
れる係止突起３８が内側に一周して形成されている。【００２５】この実施形態の逆流防止容器５０の使用方
法は、上記実施形態と同様であり、同様の効果を有する
ものである。また、容器本体１２と中栓突起５８が一体
に設けられているため、部品点数が少なく管理が容易で
あり、組立工程も簡略化することができる。【００２６】次にこの発明の第四実施形態について図
６、図７に基づいて説明する。ここで、上述の実施形態
と同様の部材は同一の符号を付して説明を省略する。こ
の実施形態の逆流防止容器６２の中栓６４には、押出口
１４の内側に嵌合される円筒状の取付部６６が設けら
れ、取付部６６の内周面には押出口１４の周縁部１４ａ
よりもわずかに容器本体１２側の位置に、取付部６６の
内外を隔てる仕切板６８が形成されている。仕切板６８
の中心には、容器本体１２の外側へ突出する三角錐状の
中栓突起７０が形成され、中栓突起７０の先端は、取付
部６６の上端面７２よりも容器本体１２側に位置してい
る。仕切板６８には、中栓突起７０の外周に沿って互い
に等間隔に４個の透孔７４が形成され、中栓６４の内側
と外側を連通している。中栓６４の外側側面には、容器
本体１２の押出口１４周縁部１４ａ付近に、後述するノ
ズル部材７８が係止される係止突起７６が形成されてい
る。【００２７】中栓６４の、容器本体１２の押出口１４か
ら外側に突出している部分に、柔軟な弾性材料で作られ
たノズル部材７８が取り付けられている。ノズル部材７
８は、中栓６４の取付部６６上端面７２と、中栓６４の
突起７０先端を連結するカバー部８０が設けられ、カバ
ー部８０は薄肉で、皿状にくぼんだ形状となっている。
カバー部８０の中心で、突起７０の先端に対向する位置
には注出口８２が形成され、注出口８２の周囲には突起
７０の側面に一周して当接する筒状突起８４が形成され
ている。カバー部８０の周縁部には、中栓６４の取付部
６６を覆う側面８６が設けられ、側面８６の周縁部内側
には、中栓６４の係止突起７６に係止される係止凸部８
８が、内側に一周して突出している。【００２８】この実施形態の逆流防止容器６２の使用方
法は、上記実施形態と同様であり、内容物を取り出すと
きは、容器本体１２の側面を押圧し、これにより容器本
体１２の内容物の圧力が高まり、中栓６４の透孔７４か
ら内容物が流れ出し、中栓６４とノズル部材７８のカバ
ー部８０で囲まれた空間に内容物が充満する。そして、
充満した内容物の圧力が高まり、図７に示すようにカバ
ー部８０が外側にふくらんで、カバー部８０の筒状突起
８４が中栓６４の突起７０から離れる。そして、カバー
部８０の筒状突起８４と中栓６４の突起７０の間に隙間
が生じ、この隙間から内容物が流れ出してノズル部材７
８の注出口８２から押し出される。【００２９】この実施形態の逆流防止容器６２によれ
ば、上記の実施形態と同様の効果を有するものである。
そして、ノズル部材７８は、カバー部８０が側面８６の
内側にくぼんで設けられているため、カバー部８０が外
力によって変形し内容物が不用意に出たり空気が流れ込
んだりすることがなく、安全である。【００３０】なお、この発明の逆流防止容器は上記各実
施形態に限定されるものではなく、中栓やノズル部材の
各部の形状は、内容物の圧力によって適度な隙間が生じ
るものであれば自由に変更可能である。【００３１】【発明の効果】この発明の逆流防止容器は、ノズル部材
自体が弁機構の作用をし、構成が簡単であり、動作も確
実なものである。さらに、内容物を取り出した後に容器
本体内に空気を吸い込んでしまうことがないため、空気
に接触して内容物が変質したり腐敗することがなく、品
質を一定に保つことができる。また、ノズル部材の注出
口付近が開閉する機構であり、ノズル部材内の内容物も
密閉されるので、変質しにくいものである。しかも、ノ
ズル部材の形状等により容易に開閉状態を設定可能であ
り、内容物の粘度が低いものから高いものまで幅広く対
応可能である。なお、容器内に空気を入れたい場合は、
ノズル部材をつまんだりすることにより容易に空気を流
入させることも可能である。そして、ノズル部材を確実
に開閉可能であり、内容物に添加する防腐剤等を削減す
ることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow container which accommodates liquid foods, cosmetics, and other fluid materials, and which can prevent the inflow of air after pushing out the accommodated material. To a backflow prevention container. [0002] Conventionally, there has been a tube-type container for accommodating a seasoning such as kneaded wasabi and a creamy cosmetic. In such a container, the side surface of the container body is pushed to increase the pressure of the contents, and the contents are extruded from the extrusion port of the container body. However, after the contents have been taken out, the container body is pushed and the force that restores the deformation that has occurred acts, and the inside of the container becomes negative pressure,
Air was flowing from the extrusion port. When the contents come into contact with the air accumulated in such a container body, the contents may be oxidized or spoiled by bacteria in the air.
In particular, in recent years, products without preservatives have been increasing, and there has been a demand for a tube-type container which is liable to cause spoilage or deterioration and does not allow air to enter. As a container for preventing the inflow of air, for example, there has been a backflow prevention tube disclosed in Japanese Utility Model Laid-Open No. 57-143147. In this backflow prevention tube, a ceiling wall for closing the extrusion port is provided at the extrusion port of the container body, and a plurality of through holes are formed in the ceiling wall. A conical nozzle having a small hole formed at the tip was attached to the tip of the extrusion port, and a valve seat parallel to the ceiling wall was provided inside the nozzle. The valve seat is provided so as to be movable in a direction perpendicular to the ceiling wall,
When the valve seat is in contact with the ceiling wall, the through hole is closed by the valve seat, and when the valve seat is away from the ceiling wall,
The contents could flow out of the through-hole through the outflow groove. [0004] The method of using this backflow prevention tube is that when the side surface of the container body is pushed, the pressure of the contents increases and the valve seat is pushed up from the ceiling wall, the through holes in the ceiling wall are released, and the contents are discharged from the nozzle through the outflow groove. Flows out. When the pressing of the side surface of the container main body is stopped after the contents are taken out, a force for restoring the deformation of the container main body works, and the container main body side becomes a negative pressure. Then
The valve seat is pulled back toward the ceiling wall to close the through hole in the ceiling wall and prevent air from flowing into the container body. [0005] In addition, there is a tube disclosed in Japanese Utility Model Publication No. 58-21399 as a container for preventing the inflow of air. This tube was provided with a lid member that closed the extrusion port and formed a through hole in the center at the extrusion port of the container body. The extrusion port further includes a cylinder portion having a through hole communicating with the inside of the container body, and a piston provided inside the cylinder portion, and the piston is biased by a spring toward the outside of the container body. I was Further, the piston has a conical projection that protrudes toward the outside of the container body, and fits into the through hole of the lid member to close the through hole. In the method of using this tube, when the side surface of the container body is pushed, the pressure of the contents increases, and the contents flow out of the through-holes of the cylinder into the cylinder, filling the space between the lid member and the cylinder. Then, the piston is pushed down into the cylinder by the pressure of the filled contents, and the projection of the piston is pulled out from the through hole of the lid member. This opens the outlet and pushes out the contents. After removing the contents, when the pressure on the side of the container body is stopped, the pressure of the contents filled between the lid member and the cylinder part decreases, and the piston moves outward from the cylinder part by the urging force of the spring. It moves and closes the through hole of the lid member. This prevents air from flowing into the container body. [0007] The above-mentioned Japanese Utility Model Application Laid-Open No. 577-1
In the case of the backflow prevention tube disclosed in Japanese Patent No. 43147, the contents remain inside the nozzle, outside the valve seat, and the contents always come into contact with the air entering from the nozzle, and there is a possibility that the contents may rot or deteriorate. . In addition, the above-mentioned
In the case of the tube disclosed in JP-A-21399,
The structure was complicated and the cost was high. In addition, there is a possibility that contents or the like may enter between the cylinder portion and the piston, and there is a possibility that a malfunction or a malfunction may occur. The present invention has been made in view of the above-mentioned conventional problems, and provides a backflow prevention container capable of reliably preventing air from entering the container body with a simple structure and maintaining the quality of the contents. The purpose is to do. SUMMARY OF THE INVENTION The present invention relates to a container body formed of resin or the like and having elasticity and having an extrusion port formed at one end thereof, and an inner plug provided to cover the extrusion port. An inner plug projection provided at the center of the inner plug and projecting conically outward from the extrusion port; a through hole provided in the inner plug communicating between the inside and the outside of the container body; A peripheral portion of the extrusion port and a nozzle member that is in close contact with the side surface of the inner plug projection are provided, and the nozzle member is provided with a cover portion formed in a conical shape, and an inner peripheral surface of the cover portion is provided. A part of the cover part is rounded and adhered to the side face, and a thin part is formed in the middle of the cover part to facilitate its elastic deformation, and the thin part of the cover part is formed by the inner plug. Contact part with
Part closer to the container body than to the container body side.
Once provided as a rounded section with a V-shaped cross section
The spout of the nozzle member is located at the center of the bent portion.
It is a backflow prevention container provided . In the backflow prevention container according to the present invention, when the side surface of the container body is pressed, the pressure of the contents of the container body is increased, the contents flow out from the through hole of the inner plug projection, and the space between the inner plug and the nozzle member is filled. . Then, the nozzle member elastically deforms outward due to the pressure of the filled content, and a gap is formed between the inner plug projection and the nozzle member. The content flows out from the gap and is pushed out from the through hole of the nozzle member. After taking out the contents,
When the pressing of the container body is stopped, a force is applied to the container body to restore the deformation caused by the pressing, the content side becomes negative pressure , the deformation of the nozzle member is restored, and it comes into close contact with the inner plug projection again. , To prevent the inflow of air. Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a backflow prevention container 10 of a first embodiment of the present invention. The backflow prevention container 10 of this embodiment has a container body 12 made of a synthetic resin having an appropriate elasticity. At one end of the container body 12, a cylindrical extrusion port 14 is integrally formed.
A male screw 16 is formed on the side surface of the. A slightly hard synthetic resin inner plug 18 is fitted and attached to the peripheral edge 14a of the extrusion opening 14. The inner plug 18 is provided with a cylindrical mounting portion 20 fitted inside the extrusion opening 14, and the upper end surface 22 of the mounting portion 20 closes the mounting portion 20 and protrudes outwardly in a conical shape. 2
4 are provided. At the base end of the inner plug projection 24 adjacent to the upper end surface 22, four through-holes 26 are formed at equal intervals along the base end circumference to communicate the inside and the outside of the inner plug 18. ing. A locking groove 28 for locking a nozzle member 32 described later is provided in the vicinity of the peripheral edge 14 a of the extrusion opening 14 of the container main body 12 on the peripheral surface of the inner plug 18 on the mounting portion 20 side.
The locking groove 28 is formed around the mounting portion 20 in parallel with the peripheral edge portion 14 a of the extrusion opening 14. A projecting wall 30 projecting upward is formed around the periphery of the upper end surface 22. A nozzle member 32 made of an elastic material such as a flexible resin or rubber is attached to a portion of the inner plug 18 projecting outward from the extrusion port 14 of the container body 12. The nozzle member 32 has a cover portion 3 formed in a conical shape.
4 is provided, and a part of the inner peripheral surface of the cover portion 34 is
8 and is in close contact with the side surface of the inner plug projection 24. A spout 36 which is a through hole is provided at the tip of the cover 34. On the inner side of the peripheral edge of the nozzle member 32 on the side of the extrusion opening 14, a locking projection 3 fitted into the locking groove 28 of the inner plug 18 is provided.
8 project inwardly. And cover part 3
In the middle of 4, a thin portion 40 is provided to facilitate elastic deformation.
Is formed. Next, a method of using the backflow prevention container 10 of this embodiment will be described. The container body 12 contains seasonings such as kneaded wasabi and creamy cosmetics, and the container body 1
The inner plug 18 and the nozzle member 32 are attached to the second extrusion port 14, and an outer lid (not shown) covering these is screwed to the male screw 16 and attached. When removing the contents, the side of the container body 12 is pressed. As a result, the pressure of the contents of the container body 12 increases, the contents flow out of the through holes 26 of the inner plug 18, and the inner plug 18 and the cover 34 of the nozzle member 32.
Contents are filled in the space surrounded by. Then, due to the pressure of the filled contents, as shown in FIG.
Is elastically deformed in the vicinity of the thin portion 40, and the cover portion 34 is expanded outward. Then, a gap is formed between the cover portion 34 and the inner plug projection 24, and the content flows out from the gap and is pushed out from the spout 36 of the nozzle member 32. After removing an arbitrary amount of the contents from the backflow prevention container 10, when the pressing of the container main body 12 is stopped, a force is applied to the container main body 12 to restore the deformation caused by the pressing. Inside becomes negative pressure. Then, the deformation of the nozzle member 32 is restored, and the nozzle member 32 is brought into close contact with the inner plug projection again.
Prevent backflow of contents once exposed to outside air. The backflow prevention container 10 of this embodiment has a simple structure and is excellent in productivity. In addition, after the contents are taken out, air is sucked into the container body 12 or the contents once contacted with the outside air are removed. There is no backflow. Thereby, the quality can be kept constant without the contents being deteriorated or spoiled by contact with the air. Further, the amount of the preservative added to the contents can be reduced.
Further, since the nozzle member 32 is made of a flexible elastic body, it can maintain high airtightness, can reliably stop air from entering and backflow of the contents, and have a low viscosity of the contents. No leakage in the case of liquid. Also, when the container side surface 12 is pressed, the contents are easily elastically deformed by the pressure of the contents, and the contents can be easily pushed out with a small force. The cover portion 34 of the nozzle member 32 and the inner plug projection 2 of the inner plug 18
Since 4 is in close contact with the vicinity of the spout 36 of the nozzle member 32, the contents staying inside the cover portion 34 do not come into contact with air and do not deteriorate. When the contents are low, when the air is put into the container body 12 and stored in an inflated state upside down and the contents are to be collected at the extrusion port 14 of the container body 12, the nozzle member 32 is used. By pinching or pulling up the cover portion 34 and elastically deforming it to create a gap between the inner plug 18 and the inner plug projection 24, air can flow backward. Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.
The backflow prevention container 42 of this embodiment includes a portion of the inner plug 18 that projects outward from the extrusion port 14 of the container body 12,
Nozzle member 44 made of the same flexible elastic material as above
Is attached. The nozzle member 44 is provided with a cover part 34 formed in a conical shape, and a part of the inner peripheral surface of the cover part 34 makes a round around and closely contacts the side surface of the inner plug projection 24 of the inner plug 18. The container body 1 is located on the side peripheral surface of the cover portion 34 at a portion closer to the container body 12 than the contact portion with the inner plug 18.
A bent portion 48 having a V-shaped cross section toward the two sides is provided around the circumference. The bent portion 48 is formed thin so as to be easily elastically deformed. The method of using the backflow prevention container 42 of this embodiment is the same as that of the above-described embodiment. When the contents are taken out, the side surface of the container main body 12 is pressed, whereby the pressure of the contents of the container main body 12 is reduced. And the content flows out of the through hole 26 of the inner plug 18, and the space filled with the inner plug 18 and the cover portion 34 of the nozzle member 44 is filled with the content. And
Due to the pressure of the filled contents, the curvature of the curved thin portion 48 of the nozzle member 44 is extended as shown in FIG.
Moves away from the inner plug projection 24 of the inner plug 18. Then, a gap is formed between the cover portion 34 and the inner plug projection 24, and the content flows out from the gap and is pushed out from the spout 36 of the nozzle member 44. According to the backflow prevention container 42 of this embodiment, the same effects as those of the above embodiment can be obtained.
And the bent part 48 is formed in the nozzle member 44, and the opening area at the time of pushing out a content can be made large,
High viscosity contents can also be easily poured out. Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The backflow prevention container 50 of this embodiment has the inner plug formed integrally with the container main body 12, and projects on the peripheral edge portion 14 a of the extrusion port 14 of the container main body 12 in parallel to the direction in which the extrusion port 14 protrudes. A cylindrical small-diameter portion 52 is formed. A locking groove 54 is formed on the peripheral side surface of the small diameter portion 52 so as to make a round, and an inner plug projection 58 that closes the small diameter portion 52 and protrudes outward in a conical shape is provided on an upper end surface 56 of the small diameter portion 52. ing. Four through-holes 60 are formed in the base end of the inner plug projection 58 adjacent to the upper end surface 56 at equal intervals along the base end circumference, and communicate the inside and outside of the container body 12. ing. The nozzle member 32 made of a soft elastic material is attached to the inner plug projection 58 of the small diameter portion 52.
The nozzle member 44 is provided with a cover portion 34 formed in a conical shape, and a part of the inner peripheral surface of the cover portion 34 is in close contact with the side surface of the protrusion 58. Extrusion port 14 of nozzle section 44
On the inner side of the peripheral portion on the side, a locking projection 38 to be fitted into the locking groove 54 of the small diameter portion 52 is formed so as to make one round inside. The method of using the backflow prevention container 50 of this embodiment is the same as that of the above embodiment, and has the same effect. In addition, since the container main body 12 and the inner plug projection 58 are provided integrally, the number of parts is small, management is easy, and the assembling process can be simplified. Next, a fourth embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The inner plug 64 of the backflow prevention container 62 of this embodiment is provided with a cylindrical attachment portion 66 fitted inside the extrusion port 14, and the inner peripheral surface of the attachment portion 66 has a peripheral portion of the extrusion port 14. 14a
A partition plate 68 that separates the inside and outside of the mounting portion 66 is formed at a position slightly closer to the container body 12 than that. Partition plate 68
At the center of the container body, a triangular pyramid-shaped inner plug projection 70 protruding to the outside of the container body 12 is formed, and the tip of the inner plug projection 70 is positioned closer to the container body 12 than the upper end surface 72 of the mounting portion 66. I have. The partition plate 68 has four through holes 74 formed at equal intervals along the outer periphery of the inner plug projection 70, and communicates the inside and the outside of the inner plug 64. On the outer side surface of the inner plug 64, a locking projection 76 for locking a nozzle member 78 described later is formed in the vicinity of the periphery 14a of the extrusion opening 14 of the container body 12. A nozzle member 78 made of a flexible elastic material is attached to a portion of the inner plug 64 projecting outward from the extrusion port 14 of the container body 12. Nozzle member 7
8 is provided with a cover 80 that connects the upper end surface 72 of the mounting portion 66 of the inner plug 64 and the tip of the projection 70 of the inner plug 64, and the cover 80 is thin and has a dish-like shape.
At the center of the cover portion 80, a spout 82 is formed at a position facing the tip of the protrusion 70, and a cylindrical protrusion 84 is formed around the spout 82 so as to make a round contact with the side surface of the protrusion 70. . A side surface 86 that covers the mounting portion 66 of the inner plug 64 is provided at a peripheral portion of the cover portion 80, and a locking protrusion that is locked by the locking projection 76 of the inner plug 64 is provided inside the peripheral portion of the side surface 86. 8
8 project inwardly. The method of using the backflow prevention container 62 of this embodiment is the same as that of the above-described embodiment. When the contents are taken out, the side surface of the container body 12 is pressed, and the pressure of the contents of the container body 12 is thereby reduced. And the content flows out from the through hole 74 of the inner plug 64, and the content is filled in a space surrounded by the inner plug 64 and the cover 80 of the nozzle member 78. And
As the pressure of the filled contents increases, the cover 80 bulges outward as shown in FIG. 7, and the cylindrical protrusion 84 of the cover 80 separates from the protrusion 70 of the inner plug 64. Then, a gap is formed between the cylindrical projection 84 of the cover portion 80 and the projection 70 of the inner plug 64, and the content flows out from this gap to form the nozzle member 7.
8 is pushed out from the spout 82. According to the backflow prevention container 62 of this embodiment, the same effects as those of the above embodiment can be obtained.
Further, since the cover portion 80 is provided to be recessed inside the side surface 86, the cover member 80 is not deformed by an external force, so that the contents do not inadvertently come out or air flows in the nozzle member 78. It is. The backflow prevention container of the present invention is not limited to the above embodiments, and the shape of each part of the inner plug and the nozzle member may be freely selected as long as an appropriate gap is generated by the pressure of the contents. Can be changed to In the backflow prevention container of the present invention, the nozzle member itself functions as a valve mechanism, the structure is simple, and the operation is reliable. Further, since the air is not sucked into the container main body after the contents are taken out, the contents can be maintained at a constant level without the contents being deteriorated or spoiled by contact with the air. In addition, a mechanism that opens and closes the vicinity of the spout of the nozzle member is provided, and the contents in the nozzle member are also sealed, so that it is hard to deteriorate. In addition, the open / closed state can be easily set according to the shape of the nozzle member and the like, and it is possible to widely cope with low to high viscosity contents. If you want to put air in the container,
By pinching the nozzle member, air can easily flow in. Then, the nozzle member can be opened and closed reliably, and the preservative and the like added to the contents can be reduced.

【図面の簡単な説明】【図１】この発明の第一実施形態の逆流防止容器の縦断
面図である。【図２】この実施形態の逆流防止容器の内容物を押し出
す状態を示す縦断面図である。【図３】この発明の第二実施形態の逆流防止容器の縦断
面図である。【図４】この実施形態の逆流防止容器の内容物を押し出
す状態を示す縦断面図である。【図５】この発明の第三実施形態の逆流防止容器の縦断
面図である。【図６】この発明の第四実施形態の逆流防止容器の縦断
面図である。【図７】この実施形態の逆流防止容器の内容物を押し出
す状態を示す縦断面図である。【符号の説明】１０逆流防止容器１２容器本体１４押出口１６雄ねじ１８中栓２０取付部２４中栓突起２６透孔２８係止溝３２ノズル部材３４カバー部３６注出口３８係止突起４０薄肉部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a backflow prevention container according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing a state where the contents of the backflow prevention container of this embodiment are pushed out. FIG. 3 is a longitudinal sectional view of a backflow prevention container according to a second embodiment of the present invention. FIG. 4 is a longitudinal sectional view showing a state where the contents of the backflow prevention container of this embodiment are pushed out. FIG. 5 is a longitudinal sectional view of a backflow prevention container according to a third embodiment of the present invention. FIG. 6 is a longitudinal sectional view of a backflow prevention container according to a fourth embodiment of the present invention. FIG. 7 is a longitudinal sectional view showing a state where the contents of the backflow prevention container of this embodiment are pushed out. DESCRIPTION OF SYMBOLS 10 Backflow prevention container 12 Container main body 14 Extrusion port 16 Male screw 18 Inner plug 20 Attachment part 24 Inner plug projection 26 Through hole 28 Locking groove 32 Nozzle member 34 Cover portion 36 Spout port 38 Locking protrusion 40 Thin portion

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.⁷，ＤＢ名) B65D 47/20 B65D 35/50 B65D 47/06 ──────────────────────────────────────────────────続き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 47/20 B65D 35/50 B65D 47/06

Claims

(57) [Claim 1] A container body having elasticity and having an extrusion port formed at one end, an inner plug provided to cover the extrusion port, and a center of the inner plug. An inner plug projection that is provided on the inner surface of the container body and that protrudes outward in a conical shape from the extrusion port; a through hole that is provided in the inner plug and communicates between the inside and the outside of the container body; And a nozzle member that is in close contact with the side surface of the inner plug projection. The nozzle member is provided with a cover portion formed in a conical shape, and a part of the inner peripheral surface of the cover portion is formed by the inner plug projection. A thin part is formed in the middle of the cover part to facilitate its elastic deformation, and the thin part of the cover part is in contact with the inner plug.
At the part closer to the container body than the contact part,
One round as a bent part with a V-shaped cross section toward the body
And the spout of the nozzle member is provided at the bent portion.
A backflow prevention container, which is provided at the center of the container.