JP2004057891A

JP2004057891A - Foam ejection pump container

Info

Publication number: JP2004057891A
Application number: JP2002217652A
Authority: JP
Inventors: Etsuya Tada; 多田　悦也; Shinichi Baba; 馬場　伸一
Original assignee: KOUNO JUSHI KOGYO KK
Current assignee: KOUNO JUSHI KOGYO KK
Priority date: 2002-07-26
Filing date: 2002-07-26
Publication date: 2004-02-26
Anticipated expiration: 2022-07-26
Also published as: JP3752205B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foam ejection pump container which can stably eject foams high in foaming ratio by making a liquid into mist and mixing air with the mist. <P>SOLUTION: In the foam ejection pump container having an air pump and a liquid pump, a negative pressure in the container is eliminated by opening an air passage hole 2e for the passage of air in a bottle and an air cylinder when it is used to make stable pumping-up by the pump possible. The pumped-up liquid is passed through pores for producing a vortex with air and ejected to a gas-liquid mixing chamber so that fine foams can be produced. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】本発明は、シャンプー、ハンドソープ、洗顔料、整髪料、ひげ剃り剤等の充填された容器の口部に取付け、そのヘッドを上下動させて該容器内の液体を吸い上げるとともに容器外の空気を該液体に混合して泡状化し、これをノズルより噴射する泡噴出ポンプ容器の構造に関する。
【０００２】
【従来技術】容器の口部に取り付けられたポンプ装置において、そのヘッド部分を上下に往復動させ、該装置内に組み込まれた液体用ポンプと空気用ポンプを同時に作動させ、該液体ポンプの下部より容器底部にまで垂下した吸液パイプを介して容器内の液体をポンプ上方の混合室に吸い上げるとともに、空気用ポンプによって該混合室に空気を導入して前記の液体と混合し、よって、これを泡状態として噴出する泡噴出ポンプには種々の技術的な問題点があり、既に、各種の改良がなされているが、なお、問題が残存するのが現状である。
【０００３】その一つとして、ヘッドを押し下げ、空気用ピストン体を下降させて空気を吐出した後、該ピストンが上昇するときには該シリンダ内が負圧になるので、これを解消するためには空気導入用逆止弁を該ピストンに付設することが必要で、これについての種々の開示がある。例えば、実開平４−１３４４５６号は空気ピストンの一部に玉弁を付設したもの、実開平６−６９１６１号、特開２００２−８６０２９（図１０）は「筒状部と該筒状部から外方に延びる薄肉の円環状外方弁部と該筒状部から内方に延びる薄肉の円環状内方弁部とを兼ね備えた弾性弁体（Ｖ）」を空気用ピストンに付設する技術を開示している。この後者によれば空気用ピストンの降下中においてはシリンダ内の空気が該円環状内方弁部を押し上げて気液混合室Ｃに入り、また、該ピストンの上昇中には外気がａの間隙を通って細孔Ｆ，Ｅよりシリンダーと容器本体内に導入されることになる。この弁構造においてはピストンの構造が複雑で組み立ても煩瑣であり、前記の弁部の柔軟性、復元性などに問題があると思われる。
【０００４】また、ヘッドを上下に往復動させると容器内の液体は液体用ポンプによって吸い上げられ、次第に容器内の負圧が大きくなり、やがて、吸液が困難になる。これを防止するための装置としては空気シリンダの側壁に小径の穴を明けて容器本体内との連通を図るのが一般的である。
【０００５】このような空気孔による容器内の導入構造として前記の特開２００２−８６０２９には、該ポンプの空気用ピストンが上端にあるときは、そのピストンの摺動シール部Ｓが該ポンプ内と容器本体間を連通する空気孔Ｅを閉ざす位置にあり、該空気用ピストンが押し下げられると前記空気孔Ｅが開放され、外気を容器本体Ｂ内に導入する構成を開示している（図１０）。これによると、押下げヘッドが下降した状態、すなわち、製造工場から消費者の手にわたるまでの間は前記の容器本体と空気用シリンダとの連通穴が閉ざれず、シリンダ内に漏洩する可能性がある。
【０００６】更には、容器内の液体と空気との均一な混合を図るために、該気液混合室の上方にメッシュを付設して発泡液の細分化を促すのが一般的である。
【０００７】
【発明が解決しようとする課題】本発明は、上記泡噴出ポンプ容器における問題点、すなわち、容器内の負圧を解消するための空気取り入れ穴における確実な漏液防止機構、空気用ポンプに適用する逆止弁の簡素化を課題とし、更には液体の均一発泡機構を提供しようとするものである。
【０００８】
【課題を解決する手段】本発明に係る泡噴出用ポンプ容器において、請求項１の発明は、同心円上に大径の空気用シリンダと小径の液体用シリンダを形成し、該液体用シリンダにはバルブシャフトとコイルスプリングを挿入してそれぞれのシリンダに気密、または液密に、かつ、摺動自在にピストンを嵌合し、該液体用シリンダには吸液パイプと逆止弁を、その上方には気液混合室を介して吐出用ノズル付き押下げヘッドを嵌合取着し、前記気液混合室に空気を圧入する空気用シリンダにはその外周面に容器への取付用フランジを周設した構成になり、該シリンダ部を容器内に挿通して前記フランジ部を容器本体口頸の上面に重ね合わせ、コンテナーキャップにより容器に取り付けてなる泡噴出ポンプ容器において、前記空気用シリンダの側壁に設けられた容器内との連通孔を、前記押下げヘッドの降下に連動するスリーブによって該ヘッドの下死点の直前に閉塞する構成とし、不使用時の空気用シリンダ内への液漏れを解消した。
【０００９】請求項２の発明においては、同心円上に大径の空気用シリンダと小径の液体用シリンダを形成し、該液体用シリンダにはバルブシャフトとコイルスプリングを挿入してそれぞれのシリンダに気密、または液密に、かつ、摺動自在にピストンを嵌合し、該液体用シリンダには吸液パイプと逆止弁を、その上方には気液混合室を介して吐出用ノズル付き押下げヘッドを嵌合取着し、前記気液混合室に空気を圧入する空気用シリンダにはその外周面に容器への取付用フランジを周設した構成になり、該シリンダ部を容器内に挿通して前記取付用フランジ部を容器本体口頸の上面に重ね、コンテナーキャップにより容器に取り付けてなる泡噴出ポンプ容器において、空気用ピストンロッド１２に摺動自在に嵌合され空気用シリンダ２１に摺動自在に装着される空気用ピストン１４は、その摺動筒１４ｃを中央に配し、その外周に通気孔１４ｄ開設のブリッジ１４ｂを介して円筒状胴部１４ａを下垂形成し、その円筒状胴部の下端外周に拡径フランジ１４ｅを介して摺動シール部１４ｆを周設した形状としたもので、空気用ピストンロッド１２に形成した上限ストッパー１２ｃの周壁１２ｂとこのピストン１４の円筒状胴部１４ａ上端外周１４ｉとが接離することによって該空気用ピストン１４の内外の空気流通を遮蔽し、または開放して通気を可能とし、更に、摺動筒１４ｃの下端外周縁１４ｈが液体用ピストンロッド９に形成した下限ストッパー９ｂの周壁９ａと気密に当接することによって該空気用シリンダ２１と気液混合室１３との通気が遮断される弁構成としたものである。
【００１０】請求項３の発明は、請求項１または請求項２に記載の泡噴出ポンプ用容器において、第二逆止弁の上方に渦流（または回転流）発生用の液流孔を形成したことにより、発泡倍率の大きい、きめの細かい泡を発生させることを可能とした。
【００１１】請求項４の発明は、円柱状体の裏面側にその中心を挟み左右対称の傾斜溝１７ａ、１７ａを該円柱状体の高さの１／２〜２／３に形成し、上面側にはその傾斜溝の上端部に一端を接する円弧状の溝１７ｂ、１７ｂを刻設した形状になる渦流発生装置１７を空気用ピストンロッド１２に形成した液流孔１２ｅの直下に嵌合装着するものとし、その渦流発生装置を通る液体が渦流となって、その直上に形成した液流孔を通り気液混合室に空気と共に入るものとし、発泡倍率の大きい、肌理細かい泡を発生させることを可能とした。
【００１２】請求項５の発明は、空気用ピストンロッド内の第二逆止弁の上方に張設し、且つ、液流孔１２ｅを開設した隔壁１２ｆにおいて、その隔壁の上面側からは該液流孔１２ｅの上端を逆円錐状に拡径する面取り１２ｈ部を形成し、下面側からは前記の面取り部１２ｈに近接する位置まで比較的大きな円錐状傾斜面１２ｉを削設し、かつ、その傾斜面１２ｉに該液流孔１２ｅの円周に一端を接し接線方向に延びる複数の突条１２ｊ、１２ｊを形成したことにより、発泡倍率の大きい、きめの細かい泡を発生させることを可能とした。
【００１３】
【発明の実施の形態】本発明の詳細について、図面を参照して説明する。図面は本発明の実施例を示したもので、図１は本発明に係る泡噴出ポンプの未使用状態、すなわち、そのヘッドが降下限度まで押し下げられた状態でコンテナキャップにより容器に装着する直前の形状を示したものであり、図２はバルブシャフトを、図３は該ポンプにおける液体用ピストン、図４は空気用ピストン、図５は整泡筒、図６は筒状閉塞部材、図７は本ポンプ装置のヘッドを該本体側のアッパーキャップとのねじ結合を解きかけた状態と該ヘット度が上昇した状態を左右に示したもの、図８、図９は渦流装置を示したものである。これらの構成部品はスプリングおよびボールを除いて殆どが軟質ないし半硬質のプラスチックを素材として製造される。図１０には従来例を示した。
【００１４】先ず、図１のポンプ１において、上部が開口し、その開口部よりやや下部外周に取付用フランジ２ａを形成したポンプ本体２は、その開口部の直径よりやや小径の空気用シリンダ２１と、それと同心円上に更に小径の液体用シリンダ２２を形成したものである。すなわち、ポンプ本体２は前記の筒状体部２ｂにおいて取付用フランジ２ａより上方に延びる部分の外周に係合突条２ｃを形成し、また、その筒状体部２ｂより下方に連続して空気用シリンダ２１を、更にその空気用シリンダ２１の底面から若干小径になる中高状隆起部２ｄを設けて再びより小径の液体用シリンダ２２を下方に延設し、その液体用シリンダ２２の下端近くに一層の小径となる段部２３と漏斗状傾斜面になる弁座２４を経て吸液パイプ嵌合筒２５を形成した形状になるものである。
【００１５】コンテナキャップ３は筒状体の上端内径側に内向フランジ３ａを張設するとともに該筒状胴部には雌ねじ３ｂを形成している。このコンテナキャップ３は前記ポンプ本体２の上方筒状体部２ｂ上端より嵌合され、したがって、その内向フランジ３ａが筒状体部２ｂに形成の取付用フランジ２ａに重ね合わされることになる。更に、コンテナキャップ３の内向フランジ３ａの上面を抑えるように次記のアッパーキャップ４が嵌合される。
【００１６】すなわち、アッパーキャップ４はその最外胴壁４ａの内周面に凸条４ｂを周設し、その内側の第二周壁４ｃとの間に前記ポンプ本体２の筒状体部２ｂ上端部を嵌合せしめて前記の係合突条２ｃと該凸条４ｂを互いに乗り越えさせ、容易に離脱せず、且つ、回動自在に組み合わされる。これによって予め挿着されたコンテナキャップ３の離脱を防止する。このアッパーキャップ４には更に小径の内周壁４ｄが下垂されており、その周壁４ｄの下端面が後記の筒状閉塞部材２８の上昇限を決めるストッパーとなっている。また、アッパーキャップ４の上端には雄ねじ４ｅが形成され、押下げヘッド５の雌ねじ５ｃと螺合することになる。
【００１７】前記液体用シリンダ２２の底部に形成した弁座２４にはボール６が装填されて第一逆止弁を構成している。
【００１８】図２に示すバルブシャフト７は、上半部７ａを小径としてその上端に若干拡径した拡径部７ｃを形成し、下半部７ｂは前記上半部７ａより若干その直径を大としてその下端に台座フランジ７ｄを形成したものである。更に、この台座フランジ７ｄの裏面を入り口とし、前記下半部７ｂの側面を出口とする液通路７ｅが開設されている。このバルブシャフト７を該台座フランジ部７ｄを下方にして前記液体シリンダ２２内に挿通し、前記段部２３上に載置され、その台座フランジ７ｄ上にコイルスプリング２７が上方付勢状態で挿入される。なお、バルブシャフト７の上端に突出する７ｇはプラスチック成形時のゲート跡で特別な意味を有しない。
【００１９】中空状の液体用ピストンロッド９は、その内径内の上方近くに上拡がり状傾斜面になる弁座９ｖを設け、ここにボール１０を装着して第二逆止弁用弁１１とし、該ピストンロッド９の中間部外周にはその周縁に上向きの周壁９ａを突設したフランジ状の下限ストッパー９ｂを形成したものである。この液体用ピストンロッド９にはその下端に図３に示すようなＨ形断面でリング状になる液体用ピストン８を嵌合させ、その底面部８ａに前記のコイルスプリング２７の上端を当接させてその付勢に抗して液体用シリンダ２２に気密に、且つ、摺動自在に嵌入される。この場合、液体用ピストン８の内径８ｂは前記バルブシャフト７上端の拡径部７ｃの直径より若干小径であり、かつ、上半部７ａの直径より大に形成されており、その組立時には該バルブシャフト７の拡径部７ｃを強制的に通過させるものである。これによって、その液体用ピストン８が上昇限に達したときにその内径８ｂが前記拡径部７ｃに液密に当接することになって液体の上下方向への流通を阻止し、液体用ピストン８が下降するとその内径８ｂとバルブシャフト７の上半部７ａ直径との間隙が液体通路となる。次いで該ピストン８が下降限に達したときにはその内径８ｂの下端周縁が下半部７ｂの肩部７ｈに当接して該液体用シリンダ２２内の液体はそれより上下に流動することがなくなる。
【００２０】弁座９ｖにボール１０が装入された液体用ピストンロッド９には、空気用ピストンロッド１２がその嵌合面において空気の流通間隙を設けて嵌合される。この空気流通用間隙１２ａを設けるために、空気用ピストンロッド１２の内径面（または液体用ピストンロッド９の外径面）には細い縦リブを、また、その嵌合部上端の段部１２ｋには放射状リブ（図示してない）を形成するなどにより、その液体用ピストンロッド９と空気用ピストンロッド１２の嵌合面を完全には密着させず、かつ、容易に抜けない程度に嵌合されている。しかも、その空気用ピストンロッド１２の下端１２ｄは液体用ピストンロッド９に形成された下限ストッパー９ｂの上面に密接することなくそこに若干の間隙を残して前記の空気流通用間隙１２ａへの空気導入口９ｃとしている。
【００２１】この空気用ピストンロッド１２には前記液体用ピストンロッド９との嵌合部の上端段部１２ｋ直上に液流液流孔１２ｅを有する隔壁１２ｆが内設され、更に上方の小径部分には後記の整泡筒１６が２個載置されて、そこに押下げヘッド５から下垂した送液管５ａが外嵌されている。この隔壁１２ｆより上方で該整泡筒１６までの径内が気液混合室１３となる。前記整泡筒１６は筒状体の一方の開口面にメッシュ１５を貼り付けたものものであり、二個をそのメッシュ１５側を両端にして重ね合わせた状態で空気用ピストンロッド上に載置した状態で整泡室とされている。更に、その空気用ピストンロッド１２の下端より若干上方に下向きに突設された周壁１２ｂを有するフランジ状の上限ストッパー１２ｃが形成されている。
【００２２】空気用ピストン１４は、前記の空気用ピストンロッド１２の下端部外径に気密に、且つ摺動自在に嵌合する摺動筒１４ｃを中央に配し、その外周に通気孔１４ｄを開設したブリッジ１４ｂ部を介して円筒状胴部１４ａを下垂形成し、その円筒状胴部の下端外周に拡径フランジ１４ｅを介して空気用シリンダ２１に気密に嵌合し摺動する直径の摺動シール部１４ｆを周設した構成である。なお、後記の押下げヘッドの作動に伴い、円筒状胴部１４ａの上端外周１４ｉは前記の上限ストッパー１２ｃの周壁１２ｂに気密に当接ないし嵌合し、下端外周１４ｈは液体用ピストンロッド９に形成した下限ストッパーの周壁９ａに気密に当接ないし嵌合する直径に形成されており、後記のように、この摺動筒１４ｃが上下方向に移動し、円筒状胴部１４ａの上端外周１４ｉ、摺動筒１４ｃの下端外周１４ｈと上下ストッパー周壁（１２ｃ、９ａ）との接離が空気用の弁作用をなし、気液混合室１３に空気を送り、或いは、空気用ピストン１４の内外の通気を遮断または開放するのである。
【００２３】上記ポンプ本体２の開口部より下方で空気用シリンダより上方の筒状体部２ｂ側壁には空気流通孔２ｅが開設されており、該ポンプ本体２の内部と容器Ｂ内の空気が流通できる構成とし、しかも、この空気流通孔２ｅには開閉する筒状閉塞部材２８を設けて開閉自在としている。すなわち、図６に示す筒状閉塞部材２８は前記空気流通孔２ｅ開設部位の筒状体部２ｂ内径と液密な外径になる穴閉塞筒体２８ａおよび前記空気用ピストンロッド１２に形成した上限ストッパー１２ｃに当接する内向きフランジ２８ｂを形成した円筒状のもので、前記の空気用ピストン１４が空気用シリンダ２１に挿通された後にポンプ本体上部から該シリンダの筒状体部２ｂに挿通嵌合される。
【００２４】空気用ピストンロッド１２の上端には前記の片面にメッシュ１５を貼り付けた２個の整泡筒１６、１６（図５）が載置され、更に、その上方から液体吐出ノズル５ｂを一体的に形成した押下げヘッド５がその嵌合筒５ａを嵌合して固定される。
【００２５】以上の構造になる本泡噴出用ポンプ１はその液体用シリンダ２２の下端の吸液パイプ結合筒２５に吸液パイプ２６を挿着して容器Ｂ内にその本体部分を挿入し、該本体に形成の取付用フランジ２ａ部を容器口端にパッキングＰを介して載置し、コンテナーキャップ３によりこれを締め付けることによって該容器に装着される。この容器Ｂには発泡性液体が充填せられており、本泡噴出用ポンプ１はヘッドを下限位置にまで押し下げられた状態で取り付けられる。したがって、液体用ピストン８、空気用ピストン１４はともに下限位置にあって液体用ピストン８の内径とバルブシャフト７の拡径部７ｂの肩部７ｈとが当接して気密を保ち、また、空気用ピストン１４は、その円筒状胴部１４ａの上端外径１４ｉを空気用ピストンロッドの上限ストッパー１２ｃに形成した周壁１２ｂに気密に接触（または嵌合）しており、下端の摺動シール部１４ｆも気密を保っていることから該空気用ピストン１４の内外における空気流通は遮断されている。さらに、筒状閉塞部材２８は空気用ピストンロッド１２に形成した上限ストッパー１２ｃにより該内向きフランジ２８ｂを押し下げ、その穴閉塞筒体２８ａが前記空気用シリンダ内と容器Ｂ内との空気流通孔２ｅを遮蔽する（図７左側断面図で矢印ａ−ｂ）。したがって、たとえ容器が転倒しても容器内の液体が空気用シリンダ内に浸入することはない。
【００２６】上記のように容器に取り付けられた本発明に係る泡噴出用ポンプ容器の使用を説明する。本発明に係る泡噴出ポンプ容器は未使用状態では図７の左側断面図に示すように押下げヘッドが下限位置にある。この状態から押下げヘッド５とアッパーキャップ４とのねじ部４ｅの結合を解くと液体用ピストン８はコイルスプリング２７の付勢によって上昇し、それと共に液体用ピストンロッド９およびそれに嵌合する空気用ピストンロッド１２も一体に上昇し、容器Ｂ内の液体が汲み上げられる。しかし、空気用ピストン１４は空気用シリンダ２１と接触ししている摺動シール部１４ｆの摩擦抵抗により動きが遅れ、その摺動筒１４ｃ部分と空気用ピストンロッド１２との間で滑りを生じる。この滑りが生じた瞬間に該空気用ピストン１４の円筒状胴部１４ａ上端の外周１４ｉと上限ストッパー１２ｃの周壁１２ｂとの密接による気密が破れ、そこから通気孔１４ｄを介して空気用ピストン１４の内外間に空気の流通（図７における矢印ｄ）が生じ、同一気圧になる。したがって、空気用ピストン１４の上下間に該ピストンの上昇よる気圧差の発生がなくなる。
【００２７】更に、この摺動筒１４ｃ部分の滑りによって、該空気用ピストンロッド１２との間で相対的に降下し、摺動筒１４ｃの下端周縁１４ｈが液体用ピストンロッド９に形成した下限ストッパー９ｂの周壁９ａに気密に当接することになる。これによって、前記の空気流通用間隙１２ａへの空気導入口部９ｃが閉塞される（図７の右側断面図）。したがって、気液混合室１３と空気用シリンダ２１との空気の流通が閉ざされ液体用シリンダ内の液体が空気用シリンダ内に浸入することがなくなる。
【００２８】更に、押下げヘッド、空気用ピストン１４等が上昇すると、液体用ピストン８の上端内周縁８ｂがバルブシャフト７の拡径部７ｃに液密に接触し、そこで液体シリンダ２２内上下を液密に区画する。さらに、該空気用ピストン１４に形成した拡径フランジ１４ｅの上面が筒状閉塞部材２８の内向きフランジ２８ｂに当接してこれを引き上げ、空気流通孔２ｅを開放することになる。したがって、液体の吸い上げによる容器Ｂ内の負圧化はこの空気流通孔２ｅを介して空気用シリンダ２１内が導入されことにより解消される。この空気用シリンダ２１内にはコンテナーキャップ３とアッパーキャップ４との嵌合部や押下げヘッド５とアッパーキャップ４との嵌合部の間隙から外気が取り入れられる。
【００２９】次いで、押下げヘッド５が押し下げられると液体用シリンダ２２内にある液体は、液体用ピストンロッド９の内径内および第二逆止弁部１１を経て気液混合室１３内に上昇する。一方、空気用ピストン１２は空気用シリンダ２１との摩擦抵抗により該空気用ピストンロッド１２より遅れて下降する。それにより、その円筒胴部の上端外周１４ｉを空気用ピストンロッド１２の上限ストッパーに突設した周壁１２ｂに密接することになり、その通気孔１４ｄによる空気の流通は阻害され、一方、摺動筒１４ｃの下端周縁部１４ｈは下限ストッパー９と離間して前記の空気導入口部９ｃを開放する。更に空気用ピストン１４が降下すると該ピストン内の空気は該空気導入口部９ｃから空気流通用間隙１２ａを経て第二逆止弁１１の上方、気液混合室１３に圧送される（図７における矢印ｃ）。そして気液混合室１３において液体用ピストンで汲み上げられた液体は該空気と混合し泡状となる。そしてその上部のメッシュ１５張設の整泡室１６で均一な粒径の泡に整えられてノズル５ｂから噴出されることになる。
【００３０】前記の本泡噴出ポンプ容器において、発泡性液体と空気との混合機構を説明したが、より発泡倍率の大きい、且つ、細かい泡を得るための装置を説明する。その原理は、気液混合室１３内に液体を噴流ないし渦流状態で送り込むことにより細かなミストとして空気と混合させ、より細かい泡を得ようとするものである。
【００３１】図８に渦流発生装置の実施例１を示した。すなわち、渦流発生装置１７は、例えば本体が円柱状であってその裏面に中心を挟む左右対称位置に傾斜溝１７ａ、１７ａをその円柱体のほぼ１／２〜２／３の高さにまで形成し、上面側にはその傾斜溝の上端部に一端を接する円弧状溝１７ｂ、１７ｂを１／２周弱の長きに刻設したものである。これを前記の空気用ピストンロッドに形成の液流孔の直下に装着する。このようにして、本泡噴出ポンプ容器の押下げヘッドを上下させると第二逆止弁１１を経て上昇する液体は前記の溝１７ａ、１７ａによって２分割され、更に、上面側の溝１７ｂ、１７ｂにより渦巻き状になる。同時に空気用シリンダから前記の空気用ピストンロッドの内径に形成された間隙１２ａを通じて圧入される空気がこの液体に巻き込まれて直上の液流孔１２ｅから気液混合室にミスト状になって突入することになり、一層細分化された泡が生成する。
【００３２】図９は渦流発生装置の実施例２を示したものである。この渦流発生装置は、上記空気用ピストンロッド１２における液流孔１２ｅを渦流の生じ易い、且つ、拡散しやすい形状としたものである。すなわち、空気用ピストンロッド内に張設し、且つ、液流孔１２ｅを開設した隔壁１２ｆにおいて、図９に示すようにその隔壁１２ｆの上面側からは該液流孔１２ｅの上端を逆円錐状に拡径する面取り１２ｈを行い、下面側からは前記の面取り１２ｈの先端に近接する位置まで比較的緩やかな円錐状傾斜面１２ｉを開窄し、かつ、その傾斜面１２ｉに該液流孔１２ｅの円周に一端を接し接線方向に延びる複数の突条１２ｊ、１２ｊを形成したものである。
【００３３】
【発明の効果】本発明に係る泡噴出ポンプ容器には、容器内部とポンプの空気用シリンダー内を通じる空気流通孔２ｅを設けているが、液体充填工場において該容器に液体を充填しポンプ装置を該容器に装着した状態においてはこれが筒状閉塞部材２８によって閉ざされている。したがって、本泡噴出ポンプ容器が消費者の手にわたり、該ポンプの押下げヘッド５とアッパーキャップ４とのねじ結合を解かない限り、たとえ容器を転倒させても容器中の液体が空気用シリンダ内に漏出することはなくなった。
【００３４】押下げヘッド５とアッパーキャップ４とのねじ結合を解き、該押し下げヘッドを上下動させると容器内の液体は泡状として噴出する。このポンプの押下げヘッド５を再び下限位置に戻し、アッパーキャップ４とのねじ結合をしない限り、すなわち、通常の使用状態においては空気流通孔２ｅは常に開放状態であり、たとえ、この上下動のストロークを極めて小さく、且つ、数回繰り返して液体噴出をしても前記の筒状閉塞部材２８は降下することなく空気流通孔２ｅは開放されているので容器内は減圧されることはない。
【００３５】このように、容器内の液体のくみ出しと同時にそれと同量の空気が該容器内に補充されるので、従来の如き減圧による容器の変形はもとより吸液ポンプの上昇に対する空気抵抗も全くなくなった。このように、該容器内が常に常圧となることから液体用ピストン８を連続作動させたとしてもその上昇速度、したがって液体の汲み上げ量は一定であり、空気との混合比率も変動がなく均質な、きめ細かい泡が得られることになった。
【００３６】液体用第二逆止弁上方の隔壁１２ｆ（又はその直前）に形成した突条１２ｊ（または溝１７ａ、１７ｂ）により液体を渦流としてその中心に穿設の液流孔１２ｅを通過、拡散させたので気液混合室にはミスト状として噴出され、同時に流入する空気用シリンダからの高速空気を巻き込み混合させたので、肌理の細かい泡が得られることになった。
【００３７】このポンプの押下げヘッド５を再び下限位置に戻し、アッパーキャップ４とのねじ結合をすれば前記の空気流通孔２ｅは筒状閉塞部材２８により閉ざされる。大衆浴場等に持参するする場合は、本泡噴出ポンプ容器をこのねじ結合状態にすることによって空気用シリンダ内への液漏れが皆無となる。
【００３８】空気用ピストン１４の円筒状胴部１４ａより内径側、すなわち、前記中心部の摺動筒１４ｃとのブリッジ１４ｂ部に通気孔１４ｄを設けたことにより、押下げヘッドの下降中は該円筒状胴部１４ａの上端縁１４ｉと空気用ピストンロッドに形成した周壁１２ｂとの気密な当接により該通気孔１４ｄを実質的に閉ざし、逆に、該押下げヘッドの上昇中はこれを開放するという弁作用を比較的単純な空気用ピストン１４によって得たもので、従来品に比べ部品点数の少ない、且つ、作動の確実な泡噴出ポンプ容器が得られる。
【図面の簡単な説明】
【図１】図１は、本発明に係る未使用状態の泡噴出用ポンプを示した中央断面の正面図である。
【図２】図２は、バルブシャフトを示したもので、（ａ）は正面図、（ｂ）はその平面図、（ｃ）は断面表示の側面図、（ｄ）は底面図である。
【図３】図３は、液体用ピストンを示したもので、（ａ）は左半分を断面で示した正面図、（ｂ）は底面図である。
【図４】図４は、空気用ピストンを示したもので、（ａ）は平面図、（ｂ）は左半分を断面で示した正面図である。
【図５】図５は、整泡筒を示したもので、（ａ）は正面図、（ｂ）上半分を断面で示した側面図である。
【図６】図６は、は筒状閉塞部材を示したもので、（ａ）は平面図、（ｂ）は左半分を断面で示した正面図である。
【図７】図７は、左半分に押下げヘッドとアッパーキャップとのねじ結合を解きかけた状態を、右半分には押下げヘッドが上昇した状態をそれぞれ断面で示した正面図である。
【図８】図８は、渦流発生装置の一例を示したもので（ａ）は平面図、（ｂ）は正面図、（ｃ）は底面図である。
【図９】図９は、空気用ピストンロッドの内径内に形成した渦流装置の実施例をその要部のみを示したもので（ａ）は平面図、（ｂ）は一部断面の正面図、（ｃ）は底面図である。
【図１０】図１０は、従来例を示した一部断面図である。
【符号の説明】
１　ポンプ
２　ポンプ本体
３　コンテナキャップ
４　アッパーキャップ
５　押下げヘッド
６　ボール
７　バルブシャフト
８　液体用ピストン
９　液体用ピストンロッド
１０　ボール１０
１１　第二逆止弁用弁座
１２　空気用ピストンロッド
１３　気液混合室
１４　空気用ピストン
１５　メッシュ
１６　整泡筒
１７　渦流発生装置
２１　空気用シリンダ
２２　液体用シリンダ
２３　段部
２４　弁座
２５　吸液パイプ嵌合筒
２６　吸液パイプ
２７　コイルスプリング
２８　筒状閉塞部材[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a liquid in a container by mounting the shampoo, hand soap, facial cleanser, hairdressing agent, shaving agent, etc. on the mouth of the container and moving the head up and down. The present invention relates to a structure of a bubble jet pump container that sucks up air, mixes the air outside the container with the liquid to form a foam, and jets the foam from a nozzle.
[0002]
2. Description of the Related Art In a pump device attached to the mouth of a container, a head portion thereof is reciprocated up and down, and a liquid pump and an air pump incorporated in the device are simultaneously operated, and a lower portion of the liquid pump is provided. The liquid in the container is sucked up into the mixing chamber above the pump via a liquid absorbing pipe hanging down to the bottom of the container, and air is introduced into the mixing chamber by an air pump to mix with the liquid. There are various technical problems with the foam ejection pump that ejects the oil in a foam state, and various improvements have already been made, but the problem still remains.
As one of them, after the head is pushed down, the air piston body is lowered to discharge air, and when the piston rises, the inside of the cylinder becomes a negative pressure. It is necessary to attach an introduction check valve to the piston, and there are various disclosures about this. For example, Japanese Utility Model Laid-Open No. 4-134456 discloses a configuration in which a ball valve is attached to a part of an air piston, and Japanese Utility Model Laid-Open No. 6-69161, Japanese Unexamined Patent Application Publication No. 2002-86029 (FIG. A technique is disclosed in which an elastic valve body (V) having both a thin annular outer valve portion extending inward and a thin annular inner valve portion extending inward from the cylindrical portion is attached to an air piston. are doing. According to the latter, during the descent of the air piston, the air in the cylinder pushes up the annular inner valve portion to enter the gas-liquid mixing chamber C, and during the ascent of the piston, the outside air flows into the gap a. Through the pores F and E into the cylinder and the container body. In this valve structure, the structure of the piston is complicated and the assembling is complicated, and it seems that there is a problem in the flexibility and the restoring property of the valve portion.
[0004] When the head is reciprocated up and down, the liquid in the container is sucked up by the liquid pump, and the negative pressure in the container gradually increases, and eventually the liquid absorption becomes difficult. As a device for preventing this, it is common to open a small-diameter hole in the side wall of the air cylinder so as to communicate with the inside of the container body.
Japanese Patent Application Laid-Open No. 2002-86029 discloses a structure for introducing an air hole into a container. When the air piston of the pump is at the upper end, the sliding seal portion S of the piston is provided inside the pump. A configuration is disclosed in which the air hole E that communicates with the container body is closed, and when the air piston is depressed, the air hole E is opened to introduce outside air into the container body B (FIG. 10). ). According to this, there is a possibility that the communication hole between the container body and the air cylinder is not closed during the state in which the press-down head is lowered, that is, from the manufacturing factory to the consumer's hand, and the leakage may occur in the cylinder. There is.
Further, in order to uniformly mix the liquid and the air in the container, a mesh is generally provided above the gas-liquid mixing chamber to promote the fragmentation of the foaming liquid.
[0007]
SUMMARY OF THE INVENTION The present invention is applied to a problem in the above-mentioned foam ejection pump container, namely, a reliable liquid leakage prevention mechanism in an air intake hole for eliminating a negative pressure in the container, and an air pump. It is an object of the present invention to simplify the check valve and to provide a uniform liquid foaming mechanism.
[0008]
According to the first aspect of the present invention, there is provided a bubble jet pump container according to the present invention, wherein a large-diameter air cylinder and a small-diameter liquid cylinder are formed concentrically. Insert a valve shaft and a coil spring into each cylinder airtightly or liquidtightly, and slidably fit a piston.The liquid cylinder has a suction pipe and a check valve above it. A press-down head with a discharge nozzle is fitted and attached via a gas-liquid mixing chamber, and an air cylinder for press-fitting air into the gas-liquid mixing chamber is provided with a flange on its outer peripheral surface for mounting to a container. In the foam ejection pump container, the cylinder portion is inserted into the container, the flange portion is overlapped on the upper surface of the mouth and neck of the container body, and the container is attached to the container with a container cap. The communication hole with the inside of the container is closed immediately before the bottom dead center of the head by a sleeve interlocking with the lowering of the press-down head, to prevent liquid leakage into the air cylinder when not in use. Resolved.
According to the second aspect of the present invention, a large-diameter air cylinder and a small-diameter liquid cylinder are formed on concentric circles, and a valve shaft and a coil spring are inserted into the liquid cylinder to airtightly seal each cylinder. , Or a liquid-tight and slidably fitted piston, a liquid suction pipe and a check valve in the liquid cylinder, and a push-down with a discharge nozzle above it through a gas-liquid mixing chamber. An air cylinder for fitting and attaching a head and forcing air into the gas-liquid mixing chamber has a configuration in which a flange for mounting to a container is provided on the outer peripheral surface thereof, and the cylinder portion is inserted into the container. In the bubble jet pump container having the mounting flange portion overlapped on the upper surface of the mouth and neck of the container body and attached to the container by a container cap, the air jet piston rod 12 is slidably fitted to the air cylinder 21 and The movably mounted pneumatic piston 14 has a sliding cylinder 14c disposed in the center, and a cylindrical body 14a is formed on the outer periphery thereof through a bridge 14b having a vent hole 14d. A sliding seal portion 14f is formed around the outer periphery of the lower end of the portion through a diameter-enlarged flange 14e. A peripheral wall 12b of an upper limit stopper 12c formed on the air piston rod 12 and a cylindrical body of the piston 14 are formed. The upper end outer periphery 14a is in contact with or separated from the upper end outer periphery 14i to block or open the air flow between the inside and the outside of the air piston 14 to allow ventilation, and further, the lower end outer peripheral edge 14h of the sliding cylinder 14c is connected to the liquid piston rod. The valve structure is such that the air between the air cylinder 21 and the gas-liquid mixing chamber 13 is shut off by airtightly contacting the peripheral wall 9a of the lower limit stopper 9b formed at 9. That.
According to a third aspect of the present invention, in the bubble jet pump container according to the first or second aspect, a liquid flow hole for generating a vortex (or a rotational flow) is formed above the second check valve. As a result, it is possible to generate fine bubbles having a large expansion ratio.
According to a fourth aspect of the present invention, a symmetrical inclined groove 17a, 17a is formed on the back side of the columnar body so as to sandwich the center thereof at 1/2 to 2/3 of the height of the columnar body. On the side of the inclined groove, a swirl generator 17 having an arc-shaped groove 17b, one end of which is in contact with the upper end of the inclined groove, is fitted directly below a liquid flow hole 12e formed in the piston rod 12 for air. The liquid passing through the vortex generator becomes a vortex, passes through the liquid flow hole formed immediately above, and enters the gas-liquid mixing chamber with air, and generates fine foam with a large foaming ratio. Was made possible.
According to a fifth aspect of the present invention, there is provided a partition wall 12f extending above a second check valve in an air piston rod and having a liquid flow hole 12e formed therein. The upper end of the flow hole 12e is formed with a chamfer 12h that expands in an inverted conical shape, and a relatively large conical inclined surface 12i is cut from the lower surface to a position close to the chamfer 12h. By forming a plurality of ridges 12j, 12j extending in the tangential direction at one end in contact with the circumference of the liquid flow hole 12e on the inclined surface 12i, it is possible to generate fine-grained bubbles having a high expansion ratio. .
[0013]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described with reference to the drawings. The drawings show an embodiment of the present invention, and FIG. 1 shows an unused state of the bubble jet pump according to the present invention, that is, a state in which the head is pushed down to the lower limit and immediately before mounting on the container by the container cap. FIG. 2 shows a valve shaft, FIG. 3 shows a liquid piston in the pump, FIG. 4 shows an air piston, FIG. 5 shows a foam regulating cylinder, FIG. 6 shows a tubular closing member, and FIG. FIGS. 8 and 9 show a vortex device in which the head of the present pump device is unscrewed from the upper cap on the main body side and the head degree is increased. FIGS. . Most of these components, except for springs and balls, are made of soft or semi-rigid plastic. FIG. 10 shows a conventional example.
First, in the pump 1 of FIG. 1, the pump body 2 having an opening at the upper part and a mounting flange 2a formed at the outer periphery of the lower part of the opening is slightly smaller than the diameter of the opening. And a liquid cylinder 22 having a smaller diameter formed concentrically therewith. That is, the pump main body 2 forms the engaging ridge 2c on the outer periphery of a portion of the tubular body 2b extending above the mounting flange 2a, and the air is continuously provided below the tubular body 2b. The cylinder 21 for air is further provided with an intermediate raised portion 2d having a slightly smaller diameter from the bottom surface of the cylinder 21 for air, and the cylinder 22 for liquid having a smaller diameter is again extended downward, and near the lower end of the cylinder 22 for liquid. The suction pipe fitting cylinder 25 is formed through a step portion 23 having a smaller diameter and a valve seat 24 having a funnel-shaped inclined surface.
The container cap 3 has an inward flange 3a stretched on the inner diameter side of the upper end of the cylindrical body, and a female screw 3b formed in the cylindrical body. The container cap 3 is fitted from the upper end of the upper cylindrical body 2b of the pump body 2, so that the inward flange 3a is overlapped with the mounting flange 2a formed on the cylindrical body 2b. Further, an upper cap 4 described below is fitted so as to suppress the upper surface of the inward flange 3a of the container cap 3.
That is, the upper cap 4 has a ridge 4b provided on the inner peripheral surface of the outermost body wall 4a, and the upper end of the cylindrical body 2b of the pump body 2 between the upper cap 4 and the inner second peripheral wall 4c. The engagement ridges 2c and the ridges 4b are fitted over each other so that the engagement ridges 2c and the ridges 4b are not easily disengaged from each other and are rotatably combined. This prevents detachment of the previously inserted container cap 3. A smaller diameter inner peripheral wall 4d is suspended from the upper cap 4, and the lower end surface of the peripheral wall 4d serves as a stopper for determining the upper limit of the cylindrical closing member 28 described later. A male screw 4 e is formed at the upper end of the upper cap 4, and is screwed with the female screw 5 c of the pressing head 5.
A ball 6 is mounted on a valve seat 24 formed at the bottom of the liquid cylinder 22 to constitute a first check valve.
The valve shaft 7 shown in FIG. 2 has an upper half 7a having a small diameter and a slightly enlarged diameter portion 7c formed at the upper end thereof. The lower half 7b has a slightly larger diameter than the upper half 7a. And a base flange 7d is formed at the lower end thereof. In addition, a liquid passage 7e is provided with the back surface of the pedestal flange 7d as an entrance and the side surface of the lower half 7b as an exit. The valve shaft 7 is inserted into the liquid cylinder 22 with the pedestal flange 7d facing downward, placed on the step 23, and the coil spring 27 is inserted into the pedestal flange 7d in an upwardly biased state. You. Note that 7 g protruding from the upper end of the valve shaft 7 has no special meaning at the gate mark at the time of plastic molding.
The hollow liquid piston rod 9 is provided with a valve seat 9v having an upwardly sloping inclined surface near the upper portion inside the inner diameter thereof, and a ball 10 is mounted thereon to form a second check valve valve 11. A flange-shaped lower limit stopper 9b having an upwardly extending peripheral wall 9a protruding from the peripheral edge thereof is formed on the outer periphery of the intermediate portion of the piston rod 9. A lower end of the liquid piston rod 9 is fitted with an annular liquid piston 8 having an H-shaped cross section as shown in FIG. 3, and an upper end of the coil spring 27 is brought into contact with the bottom surface 8a. It is airtightly and slidably fitted into the liquid cylinder 22 against the urging force. In this case, the inner diameter 8b of the liquid piston 8 is slightly smaller than the diameter of the enlarged diameter portion 7c at the upper end of the valve shaft 7 and larger than the diameter of the upper half portion 7a. This is forcibly passing through the enlarged diameter portion 7c of the shaft 7. As a result, when the liquid piston 8 reaches the ascending limit, the inner diameter 8b thereof comes into contact with the enlarged diameter portion 7c in a liquid-tight manner, thereby preventing the liquid from flowing up and down. Is lowered, a gap between the inner diameter 8b and the diameter of the upper half 7a of the valve shaft 7 becomes a liquid passage. Next, when the piston 8 reaches the lower limit, the lower peripheral edge of the inner diameter 8b abuts the shoulder 7h of the lower half 7b, and the liquid in the liquid cylinder 22 does not flow up and down.
An air piston rod 12 is fitted to the liquid piston rod 9 in which the ball 10 is inserted into the valve seat 9v, with an air flow gap provided on its fitting surface. In order to provide the air gap 12a, a thin vertical rib is provided on the inner surface of the air piston rod 12 (or the outer surface of the liquid piston rod 9), and a step 12k at the upper end of the fitting portion. Are fitted so that the fitting surfaces of the liquid piston rod 9 and the air piston rod 12 are not completely adhered to each other and cannot be easily removed by forming a radial rib (not shown). ing. In addition, the lower end 12d of the air piston rod 12 does not come into close contact with the upper surface of the lower limit stopper 9b formed on the liquid piston rod 9, leaving a slight gap there and introducing air into the air flow gap 12a. The mouth 9c.
A partition wall 12f having a liquid flow hole 12e is provided in the air piston rod 12 immediately above the upper end step 12k of the fitting portion with the liquid piston rod 9, and is further provided in a small diameter portion above the same. In the figure, two foam control cylinders 16 described later are placed, and a liquid feed pipe 5a hanging down from the press-down head 5 is externally fitted thereto. The gas-liquid mixing chamber 13 is located inside the diameter from the partition wall 12f to the foam regulating cylinder 16. The foam-regulating cylinder 16 is formed by attaching a mesh 15 to one opening surface of a cylindrical body, and is placed on an air piston rod in a state where two meshes are overlapped with the mesh 15 side at both ends. In this state, it is considered as a foam control room. Further, a flange-shaped upper limit stopper 12c having a peripheral wall 12b projecting downward slightly above the lower end of the air piston rod 12 is formed.
The piston 14 for air has a sliding cylinder 14c fitted at the center in an airtight and slidable manner at the lower end of the piston rod 12 for air, and a vent hole 14d on the outer periphery thereof. A cylindrical body 14a is formed to be suspended from the opened bridge 14b, and has a diameter of a diameter which is fitted and slidably fitted to the air cylinder 21 via an enlarged flange 14e around the lower end of the cylindrical body. This is a configuration in which a dynamic seal portion 14f is provided around. With the operation of the press-down head described later, the outer periphery 14i of the upper end of the cylindrical body 14a is in airtight contact with or fitted to the peripheral wall 12b of the upper limit stopper 12c, and the outer periphery 14h of the lower end is fitted to the liquid piston rod 9. The sliding cylinder 14c is moved up and down, as will be described later, and has an upper end outer periphery 14i of the cylindrical body portion 14a. The contact and separation between the lower end outer periphery 14h of the sliding cylinder 14c and the upper and lower stopper peripheral walls (12c, 9a) act as a valve for air, send air to the gas-liquid mixing chamber 13, or ventilate the inside and outside of the air piston 14. Shut off or open.
An air flow hole 2e is formed in the side wall of the cylindrical body portion 2b below the opening of the pump body 2 and above the air cylinder, so that the air inside the pump body 2 and the air in the container B can pass through. The air circulation hole 2e is provided with a tubular closing member 28 that can be opened and closed so that the air circulation hole 2e can be opened and closed. That is, the cylindrical closing member 28 shown in FIG. 6 is formed in the hole closing cylindrical body 28a having a liquid-tight outer diameter with the inner diameter of the cylindrical body portion 2b at the opening of the air flow hole 2e and the upper limit formed in the piston rod 12 for air. A cylindrical member having an inward flange 28b formed in contact with the stopper 12c. After the air piston 14 is inserted into the air cylinder 21, it is inserted from the upper part of the pump body into the cylindrical body 2b of the cylinder. Is done.
At the upper end of the air piston rod 12, two foam control cylinders 16 and 16 (FIG. 5) each having a mesh 15 adhered to one side are mounted, and the liquid discharge nozzle 5b is further connected from above. An integrally formed press-down head 5 is fitted and fixed to the fitting tube 5a.
In the foam blowing pump 1 having the above structure, the liquid absorbing pipe 26 is inserted into the liquid absorbing pipe connecting cylinder 25 at the lower end of the liquid cylinder 22, and the main body is inserted into the container B. The mounting flange 2a formed on the main body is placed at the mouth end of the container via the packing P, and is fastened by the container cap 3 to be mounted on the container. This container B is filled with a foaming liquid, and the foam blowing pump 1 is attached with the head pushed down to the lower limit position. Therefore, both the liquid piston 8 and the air piston 14 are at the lower limit position, and the inner diameter of the liquid piston 8 and the shoulder 7h of the enlarged diameter portion 7b of the valve shaft 7 are in contact with each other to maintain airtightness. The piston 14 has an upper end outer diameter 14i of the cylindrical body portion 14a in airtight contact (or fitting) with a peripheral wall 12b formed on an upper limit stopper 12c of the air piston rod, and a sliding seal portion 14f at the lower end also. Since the airtightness is maintained, the air flow inside and outside the air piston 14 is shut off. Further, the cylindrical closing member 28 pushes down the inward flange 28b by an upper limit stopper 12c formed on the air piston rod 12, and the hole closing cylindrical body 28a serves as an air flow hole 2e between the air cylinder and the container B. (Arrows ab in the left sectional view of FIG. 7). Therefore, even if the container falls, the liquid in the container does not enter the air cylinder.
The use of the foam ejection pump container according to the present invention attached to the container as described above will be described. When the foam ejection pump container according to the present invention is not used, the push-down head is at the lower limit position as shown in the left sectional view of FIG. When the screw portion 4e of the pressing head 5 and the upper cap 4 is disengaged from this state, the liquid piston 8 is raised by the bias of the coil spring 27, and together with this, the liquid piston rod 9 and the air fitting therewith. The piston rod 12 also moves up integrally, and the liquid in the container B is pumped up. However, the movement of the air piston 14 is delayed due to the frictional resistance of the sliding seal portion 14f which is in contact with the air cylinder 21, and slippage occurs between the sliding cylinder 14c and the air piston rod 12. At the moment when the slip occurs, the airtightness is broken due to the close contact between the outer periphery 14i of the upper end of the cylindrical body portion 14a of the air piston 14 and the peripheral wall 12b of the upper limit stopper 12c, and the air piston 14 is vented therefrom through the ventilation hole 14d. Air flows between the inside and outside (arrow d in FIG. 7), and the air pressure becomes the same. Therefore, there is no pressure difference between the upper and lower portions of the air piston 14 due to the rise of the piston.
Further, due to the sliding of the sliding cylinder 14c, the sliding cylinder 14c relatively lowers with the air piston rod 12, and the lower end peripheral edge 14h of the sliding cylinder 14c is formed on the liquid piston rod 9 by the lower limit stopper. 9b will be in airtight contact with the peripheral wall 9a. Thereby, the air inlet 9c to the air flow gap 12a is closed (right sectional view in FIG. 7). Therefore, the flow of air between the gas-liquid mixing chamber 13 and the air cylinder 21 is closed, and the liquid in the liquid cylinder does not enter the air cylinder.
Further, when the push-down head, the air piston 14 and the like are raised, the inner peripheral edge 8b of the upper end of the liquid piston 8 comes into contact with the enlarged diameter portion 7c of the valve shaft 7 in a liquid-tight manner. Partition liquid tightly. Further, the upper surface of the enlarged diameter flange 14e formed on the air piston 14 comes into contact with the inward flange 28b of the tubular closing member 28, pulls it up, and opens the air circulation hole 2e. Therefore, the negative pressure in the container B due to the suction of the liquid is eliminated by introducing the inside of the air cylinder 21 through the air flow hole 2e. Outside air is introduced into the air cylinder 21 from a gap between the fitting portion between the container cap 3 and the upper cap 4 and a gap between the fitting portion between the pressing head 5 and the upper cap 4.
Next, when the pressing head 5 is pressed down, the liquid in the liquid cylinder 22 rises into the inside of the liquid piston rod 9 and into the gas-liquid mixing chamber 13 via the second check valve portion 11. . On the other hand, the air piston 12 descends later than the air piston rod 12 due to frictional resistance with the air cylinder 21. As a result, the outer periphery 14i of the upper end of the cylindrical body comes into close contact with the peripheral wall 12b protruding from the upper limit stopper of the piston rod 12 for air, so that the flow of air through the vent hole 14d is obstructed. The lower peripheral edge 14h of the lower end 14c is separated from the lower limit stopper 9 to open the air inlet 9c. When the air piston 14 further descends, the air in the piston is pumped from the air inlet 9c to the gas-liquid mixing chamber 13 above the second check valve 11 through the air flow gap 12a (see FIG. 7). Arrow c). The liquid pumped by the liquid piston in the gas-liquid mixing chamber 13 mixes with the air to form a foam. Then, the foam having a uniform particle size is prepared in a foam control chamber 16 provided with a mesh 15 extending thereover, and is discharged from the nozzle 5b.
The mixing mechanism of the foaming liquid and air has been described in the above-mentioned foam ejection pump container. An apparatus for obtaining fine bubbles having a larger expansion ratio will be described. The principle is to feed a liquid into the gas-liquid mixing chamber 13 in a jet or vortex state to mix it with air as a fine mist to obtain finer bubbles.
FIG. 8 shows Embodiment 1 of the eddy current generator. That is, in the eddy current generator 17, for example, the main body is cylindrical and the inclined grooves 17a, 17a are formed at the symmetrical positions sandwiching the center on the back surface to approximately 1/2 to 2/3 the height of the cylindrical body. On the upper surface side, arc-shaped grooves 17b, 17b, one end of which is in contact with the upper end of the inclined groove, are engraved with a length of less than half a turn. This is mounted directly below the liquid flow hole formed on the air piston rod. In this way, when the press-down head of the foam ejection pump container is moved up and down, the liquid rising through the second check valve 11 is divided into two by the grooves 17a, 17a, and further, the grooves 17b, 17b on the upper surface side Vortex. At the same time, the air press-fitted from the air cylinder through the gap 12a formed in the inner diameter of the air piston rod is caught in the liquid and rushes into the gas-liquid mixing chamber from the liquid flow hole 12e immediately above as a mist. This results in a more fragmented foam.
FIG. 9 shows a second embodiment of the eddy current generator. In this vortex generator, the liquid flow hole 12e in the air piston rod 12 is formed in a shape in which a vortex is easily generated and easily diffused. That is, as shown in FIG. 9, the upper end of the liquid flow hole 12 e is formed in an inverted conical shape from the upper surface side of the partition 12 f in the partition wall 12 f which is stretched in the air piston rod and has the liquid flow hole 12 e opened. A relatively gentle conical inclined surface 12i is opened and closed from the lower surface side to a position close to the tip of the chamfer 12h, and the liquid flow hole 12e is formed in the inclined surface 12i. Are formed with a plurality of ridges 12j, 12j extending in the tangential direction with one end in contact with the circumference of the circle.
[0033]
The bubble jet pump container according to the present invention is provided with an air circulation hole 2e which passes through the inside of the container and the air cylinder of the pump. Is closed by the tubular closing member 28 in a state where is mounted on the container. Therefore, as long as the foam ejection pump container is in the hands of the consumer and the screw connection between the pump down head 5 and the upper cap 4 is not released, even if the container is turned over, the liquid in the container will remain in the air cylinder. No longer leaked to.
When the screw connection between the pressing head 5 and the upper cap 4 is released and the pressing head is moved up and down, the liquid in the container is ejected as a foam. The press-down head 5 of the pump is returned to the lower limit position again, and unless the screw connection with the upper cap 4 is performed, that is, in a normal use state, the air circulation hole 2e is always open. Even if the stroke is extremely small and the liquid is repeatedly ejected several times, the cylindrical closing member 28 does not descend and the air circulation hole 2e is opened, so that the pressure in the container is not reduced.
As described above, since the same amount of air is replenished into the container at the same time as the liquid in the container is pumped out, the air resistance to the rise of the suction pump as well as the deformation of the container due to the reduced pressure as in the prior art is completely eliminated. lost. As described above, since the inside of the container is always at normal pressure, even if the liquid piston 8 is continuously operated, its rising speed, and therefore, the amount of pumped liquid, is constant, and the mixing ratio with air does not fluctuate and is uniform. A fine foam was obtained.
The ridge 12j (or grooves 17a, 17b) formed on the partition wall 12f (or immediately before) above the second check valve for liquid passes the liquid as a vortex through the liquid flow hole 12e formed at the center thereof. Since it was diffused, it was ejected into the gas-liquid mixing chamber in the form of a mist, and at the same time, high-speed air from the air cylinder that flowed in was entrapped and mixed, so that fine-textured foam was obtained.
When the press-down head 5 of the pump is returned to the lower limit position and the screw is connected to the upper cap 4, the air flow hole 2e is closed by the tubular closing member 28. When the present bubble jet pump container is brought into this screw connection state when brought into a public bath or the like, there is no liquid leakage into the air cylinder.
The vent hole 14d is provided on the inner side of the cylindrical body portion 14a of the air piston 14, that is, in the bridge 14b portion with the sliding cylinder 14c at the center, so that the lowering of the push-down head can be performed. The air hole 14d is substantially closed by airtight contact between the upper end edge 14i of the cylindrical body portion 14a and the peripheral wall 12b formed on the air piston rod. Conversely, the air hole 14d is opened while the press-down head is raised. Since the valve action is performed by the relatively simple air piston 14, a foam ejection pump container having fewer parts and more reliable operation than conventional products can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view of a center section showing a foam ejection pump in an unused state according to the present invention.
2 (a) is a front view, FIG. 2 (b) is a plan view thereof, FIG. 2 (c) is a side view of a sectional view, and FIG. 2 (d) is a bottom view.
FIGS. 3A and 3B show a liquid piston, wherein FIG. 3A is a front view showing a left half in cross section, and FIG. 3B is a bottom view.
4A and 4B show a pneumatic piston, wherein FIG. 4A is a plan view, and FIG. 4B is a front view showing a left half in cross section.
FIGS. 5A and 5B show a foam regulating cylinder, in which FIG. 5A is a front view, and FIG. 5B is a side view showing an upper half in cross section.
FIGS. 6A and 6B show a cylindrical closing member. FIG. 6A is a plan view, and FIG. 6B is a front view showing a left half in cross section.
FIG. 7 is a front view showing a state in which the screw connection between the push-down head and the upper cap is about to be released in the left half, and a state in which the push-down head is raised in the right half;
FIGS. 8A and 8B show an example of the eddy current generator, wherein FIG. 8A is a plan view, FIG. 8B is a front view, and FIG. 8C is a bottom view.
FIGS. 9A and 9B show only an essential part of an embodiment of an eddy current device formed in the inner diameter of a piston rod for air. FIG. 9A is a plan view, and FIG. , (C) is a bottom view.
FIG. 10 is a partial cross-sectional view showing a conventional example.
[Explanation of symbols]
1 pump
2 Pump body
3 container cap
4 Upper cap
5 Press down head
6 balls
7 Valve shaft
8. Piston for liquid
9 Piston rod for liquid
10 balls 10
11 Valve seat for second check valve
12. Piston rod for air
13 Gas-liquid mixing chamber
14. Piston for air
15 mesh
16 foaming cylinder
17 Eddy current generator
21 Air cylinder
22 Cylinder for liquid
23 steps
24 valve seat
25 Liquid absorption pipe fitting cylinder
26 Liquid absorption pipe
27 Coil spring
28 Cylindrical closing member

Claims

A large-diameter air cylinder (21) and a small-diameter liquid cylinder (22) are formed on concentric circles, and a valve shaft (7) and a coil spring (27) are inserted into the liquid cylinder and each cylinder is inserted. Pistons (8) and (14) are slidably and air-tightly or liquid-tightly fitted, a liquid suction pipe (26) is provided at the lower end of the liquid cylinder, and a gas-liquid mixing chamber (13) is provided above. ), A press-down head (5) with a discharge nozzle is fitted and attached, and an air cylinder for press-fitting air into the gas-liquid mixing chamber has a flange (2a) for mounting to a container on the outer peripheral surface thereof. In the foam ejection pump container, the cylinder portion is inserted into the container, the mounting flange portion is superimposed on the upper surface of the mouth and neck of the container body, and the container is attached to the container by the container cap (3). Side of the air cylinder And an air communication hole (2e) communicating with the inside of the container, and a cylindrical closing member (28) for opening and closing the air communication hole is fitted in the air cylinder, and the pressing head is lowered to its lower limit position. The sleeve is slid down to close the air flow hole, and conversely, the press-down head is raised to its upper limit position to slide up the cylindrical closing member to open the air hole. A foam ejection pump container characterized in that:

A large-diameter air cylinder (21) and a small-diameter liquid cylinder (22) are formed on concentric circles, and a valve shaft (7) and a coil spring (27) are inserted into the liquid cylinder and each cylinder is inserted. Pistons (8) and (14) are slidably and air-tightly or liquid-tightly fitted, a liquid suction pipe (26) is provided at the lower end of the liquid cylinder, and a gas-liquid mixing chamber (13) is provided above. ), A press-down head (5) with a discharge nozzle is fitted and attached, and an air cylinder for press-fitting air into the gas-liquid mixing chamber has a flange (2a) for mounting to a container on the outer peripheral surface thereof. In the foam ejection pump container, the cylinder portion is inserted into the container, the mounting flange portion is superimposed on the upper surface of the mouth and neck of the container body, and the container is attached to the container by the container cap (3). Piston rod for air ( An air piston (14) slidably fitted to 2) and slidably mounted on the air cylinder (21) has its sliding cylinder (14c) arranged at the center and its outer periphery. A cylindrical body (14a) is formed downwardly through a bridge (14b) having a ventilation hole (14d) formed therein, and a sliding seal portion ( 14f) is formed in a peripheral shape, and the upper end outer periphery (14i) of the cylindrical body portion (14a) comes into contact with and separates from the peripheral wall (12b) of the upper limit stopper (12c) formed on the air piston rod (12). The air flow between the inside and outside of the air piston (14) is cut off or enabled, and the lower end outer peripheral edge (14h) of the sliding cylinder (14c) is formed of a lower limit stopper (9b) formed on the liquid piston rod (9). Airtight contact with the surrounding wall (9a) Foam jet pump chamber, characterized in that the valve arrangement the vent is blocked with the air cylinder (21) gas-liquid mixing chamber (13) by.

A large-diameter air cylinder and a small-diameter liquid cylinder are formed concentrically, and a piston is fitted in each of them in a gas-tight or liquid-tight and slidable manner. A pipe is fitted with a press-down head with a discharge nozzle through a gas-liquid mixing chamber, and a cylinder for air that presses air into the gas-liquid mixing chamber is attached to the outer peripheral surface of the pipe. In the foam ejection pump container, the cylinder portion is inserted into the container, the mounting flange portion is superimposed on the upper surface of the container body neck, and the container portion is attached to the container by a container cap. A bubble jet pump container characterized in that a liquid flow hole (12e) for generating a vortex (or a rotary flow) is formed above the second check valve (11).

Left and right symmetric inclined grooves (17a, 17a) are formed on the back side of the columnar body at 1/2 to 2/3 of the height of the columnar body, and the upper end of the inclined groove is formed on the upper side. A vortex generator (17) having an arc-shaped groove (17b, 17b) engraved at one end thereof is fitted directly below a liquid flow hole (12e) formed in an air piston rod (12). The foam ejection pump container according to claim 3, wherein:

In the partition (12f) extending above the second check valve in the air piston rod and having the liquid flow hole (12e) opened, the liquid flow hole (12e) is formed from the upper surface side of the partition. A chamfer (12h) portion whose upper end is enlarged in an inverted conical shape is formed, and a relatively large conical inclined surface (12i) is cut from the lower surface to a position close to the chamfered portion (12h), and 4. A plurality of ridges (12j), (12j) formed on the inclined surface (12i), one end of which is in contact with the circumference of the liquid flow hole (12e) and extending in a tangential direction. Foam squirt pump container.