JP3549944B2

JP3549944B2 - Liquid dispensing pump

Info

Publication number: JP3549944B2
Application number: JP13850795A
Authority: JP
Inventors: 岸　　隆生
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 1995-05-12
Filing date: 1995-05-12
Publication date: 2004-08-04
Anticipated expiration: 2019-08-04
Also published as: JPH08310575A

Description

【０００１】
【産業上の利用分野】
本発明は液体注出ポンプに関し、詳しくは、可撓性の液充填袋を内装した容器体に装着して使用する液体注出ポンプに関する。
【０００２】
【従来の技術】
一般に、高粘度であったり、或いは嫌気性の収納液を一定量で注出する液体注出ポンプとして、可撓性の液充填袋が内装された容器体に取り付け使用されるものがある。これらポンプは、容器体上部に垂下させたシリンダと、該シリンダ内に摺動可能に嵌合させた環状ピストンを下部に有するとともに、上端部の押し下げヘッドを容器体上方へ突出させて上方付勢状態で上下動可能に設けた上下動部材とを備えている。
【０００３】
また、上記シリンダの底壁には吸引口を穿設し、この吸引口周囲の底壁裏面より垂設した嵌合筒部に上端を嵌合した円筒状の吸い上げパイプを液充填袋内下部に垂下させている。
【０００４】
そして、上記上下動部材を上下動させることにより容器体内の液を吸い上げパイプ下端開口より吸引口を介してシリンダ内へ吸い上げ、また、シリンダ内の液をヘッドの注出口より注出する如く構成している。
【０００５】
【発明が解決しようとする課題】
ところが、上記した従来のものに於いては、使い初めのときには問題ないが、収納液が少なくなってくると液充填袋が吸い上げパイプ等に密着し易くなり、吸い上げパイプ下端開口が塞がれて、収納液を吸引することができなくなる。このため、ポンプが完全復帰することができなくなり、収納液が残留するという問題があった。
【０００６】
また、液充填袋が吸い上げパイプ等に密着することによって、液充填袋上部にある収納液が吸い上げパイプ下端開口まで流下することを阻止し、併せて液充填袋の底部が重点的にしぼむことによって収納液が上部に溜まることとなる。このように収納液が液充填袋の上部に残留しては不経済である。
【０００７】
本発明はこのような従来の技術の欠点に鑑みなされたもので、液充填袋が収納液のシリンダ内への吸い上げの邪魔をすることがなく円滑且つ確実な液の注出が行えるとともに、収納液の略全量を注出することが出来、しかも生産性に優れた安価に製造できる液体注出ポンプを提案するものである。
【０００８】
【課題を解決するための手段】
上記課題を解決するため、本発明の第１の手段として、収納液の取り出しによる内部負圧化に伴って収縮する収納液密閉用の液充填袋２を有する容器体３に取り付けて使用されるポンプであって、上記容器体内上部に垂下させてその底壁14中央に吸引口15を開口させたシリンダ４と、該シリンダ内に摺動可能に嵌合させた環状ピストン22を下部に有するとともに、上端部の押し下げヘッド23を容器体上方へ突出させて上方付勢状態で上下動可能に設けた上下動部材５とを備え、該部材５の上下動により容器体内の液をシリンダ４内へ吸い上げてヘッド23の注出口より注出する如く構成した液体注出ポンプに於いて、上記シリンダ４の周壁13外面及び底壁14下面を凹凸面Ａに形成し、上記吸引口15周囲のシリンダ底壁下面に上端を連結して下端を液充填袋２内底部に垂下させ、且つ、液充填袋による吸引口の閉塞を邪魔するための隙間保持体６をシリンダ４と一体に形成してなることを特徴とする液体注出ポンプとして構成した。
【０００９】
また、第２の手段として、上記第１の手段に於いて、上記隙間保持体６が、シリンダ底壁14下面の吸引口15周囲に、周方向等間隔に複数の脚29を垂設してなる液体注出ポンプとして構成した。（請求項１）
【００１０】
また、第３の手段として、上記第１の手段に於いて、上記隙間保持体６が、シリンダ底壁14下面の吸引口15周囲に上端を一体に連結して下端を液充填袋２の内底部に垂下させた筒状をなすとともに、外面上端より下端に至る周方向複数の突条32を縦設し、且つ、筒壁の前記突条縦設部分に前記突条を貫通する透孔33を複数穿設してなる液体注出ポンプとして構成した。（請求項２）
【００１１】
また、第４の手段として、上記第１の手段に於いて、上記隙間保持体６が、シリンダ底壁14下面の吸引口15周囲に上端を一体に連結した支持板部34を垂設し、各支持板部34下面に縦長の放射板状部35上面を一体に連結してなる液体注出ポンプとして構成した。
【００１２】
また、第５の手段として、上記第１の手段に於いて、上記隙間保持体６が、シリンダ底壁14下面の吸引口15両側に一対の支持棒部36を垂設するとともに、各支持棒部36下面にドーナツ板状部37上面周縁部を連結し、且つ、各支持棒部36前面相互及び後面相互に複数の円弧板状部38を掛け渡してなる液体注出ポンプとして構成した。（請求項３）
【００１３】
【作用】
液充填袋２内の液が減少することにより該袋がしぼんでも、隙間保持体６の存在で吸引口１５を閉塞することは無い。
【００１４】
また、シリンダ周壁１３外面及び底壁１４下面を凹凸面Ａに形成しているので、しぼんだ液充填袋２がシリンダ外面に密着しない。
【００１５】
【実施例】
以下、本発明の実施例を図面を参照して説明する。
図１は本発明の一実施例を示すもので、本発明液体注出ポンプ１は、内部に液充填袋２を有する容器体３に取り付けて使用されるもので、シリンダ４と、上下動部材５と、隙間保持体６とを備えている。
【００１６】
容器体３は筒状胴部７上端縁より口頚部８を起立して構成しており、口頚部８外周には螺条を周設している。この容器体の胴部７から口頚部８に至る内面全面及び口頚部上面に亘り液充填袋２が剥離可能に積層されている。また、口頚部８下部には透孔９を穿設して容器体３内面及び該内面から剥離する液充填袋２との間に外気を導入可能に構成している。
【００１７】
尚、本発明に於いて液充填袋２は上記した如き容器体内面に剥離可能に積層したものに限らず、容器体内に単に挿入させたものであっても良く、従来のこの種容器に使用される液充填袋の形態であればいずれも採用できる。
【００１８】
シリンダ４は、装着キャップ１０により上端を容器体口頚部に固定させるとともに、その下端部を容器体内上部に垂下させている。本実施例では、容器体口頚部８上面にパッキン１１を介して載置させたフランジ１２を周壁１３上端より突設するとともに、周壁１３下端縁より延設した底壁１４中央には吸引口１５を穿設している。
【００１９】
また、シリンダ４の周壁１３外面及び底壁１４下面を凹凸面Ａに形成して、しぼんだ液充填袋２が密着するのを防止する如く構成している。本実施例では、周壁１３外面上端より下端に至り、更に底壁１４下面中央部に至る凹溝１６を周方向多数形成して凹凸面Ａを形成している。
【００２０】
また、装着キャップ１０は、容器体口頚部８外周に螺着させる周壁１７上端縁より内向きフランジ状の頂壁１８を延設し、また、頂壁中央の窓孔周縁から下方へ短筒１９を垂設し、更に、頂壁１８上面からは上下動部材５の上下動を案内する案内筒２０を立設して構成している。
【００２１】
そして、上記フランジ１２を装着キャップ頂壁１８下部の周壁１７と短筒１９間に嵌合させてシリンダ４を装着キャップ１０に固定させるとともに、装着キャップ周壁１７を口頚部８外周に螺着させることにより、容器体口頚部８上面にパッキン１１介してシリンダのフランジ１２を圧接し、以てシリンダを容器体に固定させている。
【００２２】
また、シリンダ４内には吸い込み弁２１を設けている。この吸い込み弁２１は、シリンダ周壁１３内下端部に嵌着させたリング状の枠部２１ａと、上記吸引口１５上面を閉塞する弁板２１ｂとを周方向複数の弾性板部２１ｃにより一体に連結させて構成した公知機構のものである。
【００２３】
上下動部材５は、上記シリンダ４内に摺動可能に嵌合させた環状ピストン２２を下部に有するとともに、上端部の押し下げヘッド２３を容器体上方へ突出させて上方付勢状態で上下動可能に設けたものである。
【００２４】
本実施例では、シリンダ４内周に上下摺動可能に外周縁を嵌合させた断面Ｈ状をなす環状ピストン２２の内周縁部を、シリンダ４内中央部に上下動可能に挿入したステム２４の外周下部に所定幅の上下動が可能に嵌合させ、また、ステム２４の上端にはノズル２５付き押し下げヘッド２３を嵌着固定して、ステム２４内上端と上記ノズル２５内とを連通させ、また、押し下げヘッド２３の頂壁裏面と上記装着キャップの頂壁上面との間に介在されたコイルスプリング２６により常時上方へ付勢させている。更に、ヘッド２３の周壁を上記案内筒２０外周に上下動可能且つ抜け出し不能に嵌合させている。
【００２５】
上記環状ピストン２２を嵌合した部分のステム２４には透孔２７を穿設し、環状ピストン２２内周下端縁がその透孔２７下部位置に突設したフランジ部２８上面に圧接する際に、その透孔２７が閉塞されてシリンダ４内とステム２４内とが遮断され、また、環状ピストン２２がステム２４と相対的に上昇する際には透孔２７を介してシリンダ４内とステム２４内とが連通する如く構成している。
【００２６】
そして、ヘッド２３を押し下げるとシリンダ４内が加圧されるとともに、環状ピストン２２がステム２４に対して相対的に押し上げられ、加圧液がシリンダ４より透孔２７を通りステム２４を介してノズル２５先端の注出口から外部に注出される。一方、上下動部材５が上昇する際はシリンダ４内が負圧化し、環状ピストン２２が相対下降して透孔２７を閉塞させるとともに、吸い込み弁２１が開いて容器体内の液をシリンダ４内へ導入する。
【００２７】
尚、本発明に於いて上記シリンダや上下動部材等の具体的構成は上記実施例のものに限らず、従来のこの種ポンプに使用されているポンプ機構であれば採用できる。
【００２８】
隙間保持体６は、上記シリンダ４と一体に形成され、また、液充填袋２による吸引口１５の閉塞を邪魔するためのもので、上記吸引口１５周囲のシリンダ底壁１４下面に上端を連結して下端を液充填袋２内底部に垂下させたものである。この隙間保持体６の具体的構成は種々採用出来、例えば、図１乃至図１０に示すものが挙げられる。
【００２９】
図１及び図２に示す実施例では、吸引口１５周囲のシリンダ底壁１４下面周囲より、周方向等間隔に複数の脚２９を垂設してなる隙間保持体を構成している。
【００３０】
図１の実施例では、吸引口１５周囲のシリンダ底壁１４下面前後左右位置より、各々横断面が外方へ突出する円弧状をなす四本の脚２９を垂設して隙間保持体６を構成している。また、各脚２９は内面中央の上端から下端に至る縦リブ２９ａを各々縦設している。
【００３１】
図２に示す実施例では、吸引口１５周囲のシリンダ底壁１４下面周囲の周方向等間隔位置より三本の棒状脚３０を垂設し、各脚の下端をドーナツ板状部３１上面に一体に連結して収束させ、隙間保持体６を構成している。
【００３２】
また、図３乃至図５に示す実施例では、上記吸引口１５周囲に上端を一体に連結して下端を液充填袋２内底部に垂下させた筒状をなすとともに、筒壁外面上端より下端に至る突条３２を周方向複数縦設し、且つ、筒壁に透孔３３を穿設して隙間保持体６を構成している。
【００３３】
図３に示す隙間保持体６は、筒壁外面上端より下端に至る突条３２を周方向多数縦設し、また、筒壁下端縁の周方向三箇所に切り溝状の透孔３３を穿設して構成している。
【００３４】
図４に示す隙間保持体６は、筒壁の周囲四箇所に等間隔に突条３２を縦設し、筒壁の突条縦設部分に突条を貫通する透孔３３を複数穿設して構成している。
【００３５】
図５に示す隙間保持体６は、筒壁の周囲三箇所に等間隔に突条３２を縦設し、筒壁の上端部をリング状の透孔３３を穿設して構成している。
【００３６】
また、図６に示す実施例では、吸引口１５周囲に等間隔に三箇所から短い支持板部３４を垂設し、各支持板部３４下面に三枚よりなる縦長の放射板状部３５を上面を一体に連結して隙間保持体６を構成している。
【００３７】
図７に示す実施例では、吸引口１５両側に一対の支持棒部３６を垂設するとともに、各支持棒部３６下面にドーナツ板状部３７上面周縁部を連結し、各支持棒部３６前面相互及び後面相互に複数の円弧板状部３８を掛け渡して隙間保持体６を構成している。
【００３８】
図８に示す実施例では、吸引口１５両側に両上端部を連結して吸引口１５下方を掛け渡した凹状板部３９と、該凹状板部３９下面中央より垂下させた棒状部４０と、該棒状部外面より放射状に突設した複数の突起４１とから隙間保持体６を構成している。
【００３９】
図９に示す実施例では、平行する一対の正面視Ｖ字状をなす弾性板４２の各上端を吸引口１５周囲に連結させ、各弾性板４２間下端相互を連通板４３で連結させて隙間保持体６を構成している。
【００４０】
図１０に示す実施例では、上端中央部に吸引口１５を開口する窓孔４４を穿設して吸引口１５両側に上端を連結させるとともに、中央が格子状に形成された格子板部４５と、吸引口１５前後に垂設した一対の係止板４６とから隙間保持体６を構成している。
【００４１】
尚、上記各部材は主として合成樹脂を使用して形成し、必要に応じてエラストマー，金属等を使用して形成する。
【００４２】
【発明の効果】
以上説明した如く本発明ポンプは、シリンダの周壁外面及び底壁下面を凹凸面に形成したので、液が減少して液充填袋がしぼんだ際にシリンダ外面に液充填袋が密着してその上部の液が下方へ移行しなくなる等の不都合を防止出来、また、吸引口周囲のシリンダ底壁下面に上端を連結して下端を液充填袋内底部に垂下させ、且つ液充填袋による吸引口の閉塞を邪魔するための隙間保持体を設けたので液充填袋がしぼんだ際にも上下動部材の作動不良が生じたりすることがなく、円滑な作動が行えるとともに、袋内の収納液の略全量を注出することができるものである。
【００４３】
また、隙間保持体とシリンダとは一体に形成しているため製造が容易で、また、組み付け操作も簡単となるため、安価に製造することができるという利点を兼ね備えている。
【００４４】
また、上記第２の手段では、液が隙間保持体の各脚の間からも吸引口に導入されるため、上下動部材のより円滑な作動を行えるものである。
【００４５】
また、上記第３の手段では、たとえ液充填袋が下端開口を閉塞することがあっても、筒壁に形成された透孔は各突条により閉塞されないため、確実に吸引口への液の導入を行える。
【００４６】
また、上記第４の手段では、各支持板部が吸引口の閉塞を阻止するとともに、放射板状部の各板間を伝って液が確実に吸引口に導入される。
【００４７】
また、上記第５の手段では、各支持棒部及び各円弧板状部により吸引口の閉塞を阻止して確実に吸引口への液の導入を行える。
【図面の簡単な説明】
【図１】本発明の一実施例を示す半断面図である。
【図２】シリンダ及び隙間保持体の他の一例を示す斜視図である。
【図３】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【図４】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【図５】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【図６】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【図７】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【図８】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【図９】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【図１０】シリンダ及び隙間保持体の更に他の一例を示す斜視図である。
【符号の説明】
２…液充填袋，３…容器体、４…シリンダ，５…上下動部材，
６…隙間保持体，１３…シリンダ周壁，１４…シリンダ底壁，１５…吸引口，
２２…環状ピストン，２３…押し下げヘッド，３２…突条，３３…透孔，
３４…支持板部，３５…放射板状部，３６…支持棒部，３７…ドーナツ板状部，
３８…円弧板状部[0001]
[Industrial applications]
The present invention relates to a liquid dispensing pump, and more particularly, to a liquid dispensing pump used by being attached to a container body provided with a flexible liquid-filled bag.
[0002]
[Prior art]
2. Description of the Related Art Generally, as a liquid injection pump for discharging a high-viscosity or anaerobic stored liquid in a fixed amount, there is a liquid injection pump which is attached to a container body provided with a flexible liquid-filled bag. These pumps have a cylinder suspended from the upper part of the container body, an annular piston slidably fitted in the cylinder at the lower part, and a downwardly pressing head at the upper end part is protruded above the container body to urge upward. And a vertically movable member provided to be vertically movable in the state.
[0003]
Further, a suction port is formed in the bottom wall of the cylinder, and a cylindrical suction pipe whose upper end is fitted to a fitting cylinder portion vertically provided from the back surface of the bottom wall around the suction port is provided in a lower portion of the liquid filling bag. Hanging.
[0004]
Then, the liquid in the container body is sucked up into the cylinder through the suction port from the lower end opening of the pipe by moving the vertical movement member up and down, and the liquid in the cylinder is discharged from the outlet of the head. ing.
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned conventional apparatus, there is no problem at the beginning of use, but when the stored liquid is reduced, the liquid filling bag becomes easily adhered to the suction pipe or the like, and the lower end opening of the suction pipe is closed. Then, the stored liquid cannot be sucked. For this reason, there has been a problem that the pump cannot be completely restored, and the stored liquid remains.
[0006]
In addition, the liquid filling bag is in close contact with the suction pipe, etc., thereby preventing the stored liquid at the top of the liquid filling bag from flowing down to the bottom opening of the suction pipe, and in addition, the bottom of the liquid filling bag is mainly deflated. The stored liquid will pool at the top. Thus, it is uneconomical for the stored liquid to remain on the upper part of the liquid filling bag.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described drawbacks of the related art, and a liquid-filled bag can smoothly and reliably pour out a liquid without disturbing suction of a stored liquid into a cylinder. An object of the present invention is to provide a liquid infusion pump capable of injecting substantially the entire amount of liquid and having excellent productivity and inexpensive production.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, as a first means of the present invention, it is used by being attached to a container body 3 having a liquid filling bag 2 for sealing a stored liquid, which contracts due to internal negative pressure caused by taking out the stored liquid. A pump, which has a cylinder 4 having a suction port 15 opened at the center of a bottom wall 14 of the cylinder, and an annular piston 22 slidably fitted in the cylinder at the lower portion. A vertically moving member 5 provided with a pressing head 23 at an upper end portion protruding above the container body so as to be vertically movable in an upwardly biased state, and the liquid in the container body is moved into the cylinder 4 by the vertical movement of the member 5. In the liquid pouring pump configured to suck up and pour out from the pouring port of the head 23, the outer surface of the peripheral wall 13 and the lower surface of the bottom wall 14 of the cylinder 4 are formed on the uneven surface A, and the cylinder bottom around the suction port 15 is formed. Connect the upper end to the lower surface of the wall and fill the lower end with liquid. The liquid discharging pump is characterized by being formed integrally with the cylinder 4 and a gap holding body 6 for hanging down on the inner bottom portion of the filling bag 2 and preventing the suction port from being closed by the liquid filling bag. .
[0009]
Further, as a second means, in the first means, the gap holding member 6 is formed by vertically extending a plurality of legs 29 around the suction port 15 on the lower surface of the cylinder bottom wall 14 at equal intervals in the circumferential direction. It was configured as a liquid injection pump. (Claim 1)
[0010]
Further, as a third means, in the first means, the gap holding member 6 is integrally connected to the upper end around the suction port 15 on the lower surface of the cylinder bottom wall 14 and is connected to the lower end of the liquid filling bag 2. It has a cylindrical shape hanging down from the bottom, a plurality of circumferentially extending ridges 32 extending from the upper end to the lower end of the outer surface are vertically provided, and a through hole 33 penetrating through the ridge in the vertically provided portion of the cylindrical wall. Was constructed as a liquid injecting pump having a plurality of holes. (Claim 2)
[0011]
Further, as a fourth means, in the first means, the gap holding member 6 vertically suspends a support plate portion 34 having an upper end integrally connected around the suction port 15 on the lower surface of the cylinder bottom wall 14, The liquid injection pump is constituted by integrally connecting the upper surface of the vertically long radial plate portion 35 to the lower surface of each support plate portion 34.
[0012]
Further, as a fifth means, in the first means, the gap holding member 6 has a pair of support rod portions 36 vertically provided on both sides of the suction port 15 on the lower surface of the cylinder bottom wall 14 and each support rod The liquid injection pump is configured by connecting the peripheral edge of the upper surface of the donut plate-shaped portion 37 to the lower surface of the portion 36, and by bridging a plurality of arc plate-shaped portions 38 between the front surface and the rear surface of each support rod portion 36. (Claim 3)
[0013]
[Action]
Even if the liquid in the liquid filling bag 2 is reduced due to the decrease in the liquid in the liquid filling bag 2, the suction port 15 is not closed by the presence of the gap holding member 6.
[0014]
Further, since the outer surface of the cylinder peripheral wall 13 and the lower surface of the bottom wall 14 are formed on the uneven surface A, the deflated liquid filling bag 2 does not adhere to the outer surface of the cylinder.
[0015]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of the present invention. A liquid pouring pump 1 of the present invention is used by being attached to a container body 3 having a liquid filling bag 2 therein, and includes a cylinder 4 and a vertically moving member. 5 and a gap holder 6.
[0016]
The container body 3 is configured so that the mouth and neck 8 stands upright from the upper edge of the cylindrical body 7, and a thread is provided around the outer periphery of the mouth and neck 8. The liquid filling bag 2 is releasably laminated over the entire inner surface from the body portion 7 to the mouth and neck portion 8 of the container body and the upper surface of the mouth and neck portion. Further, a through hole 9 is formed in the lower part of the mouth and neck portion 8 so that outside air can be introduced between the inner surface of the container body 3 and the liquid filling bag 2 peeled off from the inner surface.
[0017]
In the present invention, the liquid-filled bag 2 is not limited to the above-described one that is releasably laminated on the inner surface of the container, but may be one that is simply inserted into the container. Any form can be adopted as long as it is in the form of a liquid-filled bag.
[0018]
The upper end of the cylinder 4 is fixed to the mouth and neck of the container body by the mounting cap 10, and the lower end of the cylinder 4 is suspended above the container body. In the present embodiment, a flange 12 mounted on the upper surface of the neck 8 of the container body via a packing 11 is protruded from the upper end of the peripheral wall 13, and a suction port 15 is provided at the center of the bottom wall 14 extended from the lower edge of the peripheral wall 13. Has been drilled.
[0019]
In addition, the outer surface of the peripheral wall 13 and the lower surface of the bottom wall 14 of the cylinder 4 are formed on the uneven surface A so as to prevent the collapsed liquid filling bag 2 from sticking. In the present embodiment, the concave and convex surface A is formed by forming a large number of concave grooves 16 in the circumferential direction from the upper end of the outer surface of the peripheral wall 13 to the lower end and further to the center of the lower surface of the bottom wall 14.
[0020]
In addition, the mounting cap 10 has an inward flange-shaped top wall 18 extending from an upper end edge of a peripheral wall 17 screwed to the outer periphery of the container body neck 8 and a short cylinder 19 extending downward from the periphery of the window hole at the center of the top wall. , And a guide tube 20 that guides the up and down movement of the up and down moving member 5 from the upper surface of the top wall 18.
[0021]
The cylinder 4 is fixed to the mounting cap 10 by fitting the flange 12 between the peripheral wall 17 below the mounting cap top wall 18 and the short cylinder 19, and the mounting cap peripheral wall 17 is screwed to the outer periphery of the mouth and neck portion 8. As a result, the flange 12 of the cylinder is pressed against the upper surface of the neck 8 of the container body via the packing 11, thereby fixing the cylinder to the container body.
[0022]
A suction valve 21 is provided in the cylinder 4. The suction valve 21 integrally connects a ring-shaped frame portion 21a fitted to the lower end portion of the inner wall 13 of the cylinder and a valve plate 21b for closing the upper surface of the suction port 15 by a plurality of elastic plate portions 21c in the circumferential direction. This is a well-known mechanism configured as such.
[0023]
The vertically movable member 5 has an annular piston 22 slidably fitted in the cylinder 4 at a lower portion, and is capable of vertically moving in a state of being urged upward by projecting a press-down head 23 at an upper end portion above the container body. It is provided in.
[0024]
In the present embodiment, an inner peripheral edge of an annular piston 22 having an H-shaped cross section in which an outer peripheral edge is fitted to the inner periphery of the cylinder 4 so as to be vertically slidable is vertically inserted into a central portion of the cylinder 4 in a stem 24. The upper end of the stem 24 is fitted with and fixed to a lowering head 23 with a nozzle 25 so that the upper end of the stem 24 communicates with the inside of the nozzle 25. The coil spring 26 interposed between the back surface of the top wall of the press-down head 23 and the top surface of the top wall of the mounting cap constantly urges the head upward. Further, the peripheral wall of the head 23 is fitted to the outer periphery of the guide cylinder 20 so as to be vertically movable and not to come out.
[0025]
A through hole 27 is drilled in the stem 24 where the annular piston 22 is fitted, and when the inner peripheral lower edge of the annular piston 22 presses against the upper surface of the flange portion 28 projecting below the through hole 27, The through hole 27 is closed to shut off the inside of the cylinder 4 and the stem 24, and when the annular piston 22 rises relatively to the stem 24, the inside of the cylinder 4 and the inside of the stem 24 via the through hole 27. Are configured to communicate with each other.
[0026]
When the head 23 is pushed down, the inside of the cylinder 4 is pressurized, and the annular piston 22 is pushed up relatively to the stem 24, so that the pressurized liquid passes through the through hole 27 from the cylinder 4, It is poured out from the 25 outlets. On the other hand, when the vertically moving member 5 rises, the inside of the cylinder 4 becomes negative pressure, the annular piston 22 relatively lowers to close the through hole 27, and the suction valve 21 is opened to move the liquid in the container into the cylinder 4. Introduce.
[0027]
In the present invention, the specific configuration of the cylinder, the vertically moving member, and the like is not limited to the above-described embodiment, but may be any pump mechanism used in a conventional pump of this type.
[0028]
The gap holding member 6 is formed integrally with the cylinder 4 and serves to prevent the liquid filling bag 2 from closing the suction port 15, and has an upper end connected to the lower surface of the cylinder bottom wall 14 around the suction port 15. Then, the lower end is hung down on the inner bottom of the liquid filling bag 2. Various specific configurations of the gap holding body 6 can be adopted, and examples thereof include those shown in FIGS. 1 to 10.
[0029]
In the embodiment shown in FIGS. 1 and 2, a gap holding body is formed by suspending a plurality of legs 29 at equal intervals in the circumferential direction from around the lower surface of the cylinder bottom wall 14 around the suction port 15.
[0030]
In the embodiment shown in FIG. 1, four legs 29 each having an arc shape whose cross section protrudes outward are vertically provided from the front, rear, left and right positions on the lower surface of the cylinder bottom wall 14 around the suction port 15 to suspend the gap holding body 6. Make up. Each leg 29 is provided with a vertical rib 29a extending from the upper end to the lower end at the center of the inner surface.
[0031]
In the embodiment shown in FIG. 2, three rod-shaped legs 30 are suspended from circumferentially equidistant positions around the lower surface of the cylinder bottom wall 14 around the suction port 15, and the lower ends of the legs are integrated with the upper surface of the donut plate-shaped portion 31. To form a gap holding member 6.
[0032]
In addition, in the embodiment shown in FIGS. 3 to 5, the upper end is integrally connected to the periphery of the suction port 15 and the lower end is made to hang down from the inner bottom of the liquid filling bag 2. Are provided vertically in the circumferential direction, and a through hole 33 is formed in the cylindrical wall to form the gap holding body 6.
[0033]
The gap holding member 6 shown in FIG. 3 is provided with a number of ridges 32 extending from the upper end to the lower end of the outer surface of the cylindrical wall in the circumferential direction. It is set up and configured.
[0034]
The gap holding member 6 shown in FIG. 4 has ridges 32 vertically provided at four locations around the cylindrical wall at equal intervals, and a plurality of through-holes 33 penetrating the ridges at the vertically provided ridges of the cylindrical wall. It is composed.
[0035]
The gap holding member 6 shown in FIG. 5 is formed by vertically protruding ridges 32 at three locations around the cylindrical wall at equal intervals and forming a ring-shaped through hole 33 at the upper end of the cylindrical wall.
[0036]
Further, in the embodiment shown in FIG. 6, short support plate portions 34 are vertically provided from three places around the suction port 15 at equal intervals, and three vertically long radiating plate-like portions 35 are formed on the lower surface of each support plate portion 34. The gap holding body 6 is formed by integrally connecting the upper surfaces.
[0037]
In the embodiment shown in FIG. 7, a pair of support rods 36 are vertically provided on both sides of the suction port 15, and a lower surface of each support rod 36 is connected to a periphery of an upper surface of a donut plate 37, and a front surface of each support rod 36 is connected. A plurality of arc-shaped plate-shaped portions 38 are bridged between each other and the rear surface to form the gap holding body 6.
[0038]
In the embodiment shown in FIG. 8, a concave plate portion 39 having both upper ends connected to both sides of the suction port 15 and extending under the suction port 15, a rod portion 40 hanging down from the center of the lower surface of the concave plate portion 39, The plurality of protrusions 41 projecting radially from the outer surface of the rod portion constitute the gap holding body 6.
[0039]
In the embodiment shown in FIG. 9, the upper ends of a pair of parallel elastic V-shaped elastic plates 42 in front view are connected around the suction port 15, and the lower ends between the elastic plates 42 are connected to each other by the communication plate 43 to form a gap. The holding body 6 is constituted.
[0040]
In the embodiment shown in FIG. 10, a window hole 44 that opens the suction port 15 is formed at the center of the upper end to connect the upper end to both sides of the suction port 15, and a grid plate part 45 having a center formed in a grid shape. The gap holding body 6 is constituted by a pair of locking plates 46 vertically provided around the suction port 15.
[0041]
Each of the above members is mainly formed using a synthetic resin, and is formed using an elastomer, a metal, or the like as necessary.
[0042]
【The invention's effect】
As described above, in the pump of the present invention, since the outer peripheral surface and the lower surface of the bottom wall of the cylinder are formed with uneven surfaces, when the liquid decreases and the liquid filling bag is deflated, the liquid filling bag comes into close contact with the outer surface of the cylinder and the upper portion of the upper portion thereof. The upper end is connected to the lower surface of the cylinder bottom wall around the suction port so that the lower end hangs down on the bottom of the liquid filling bag, and the suction port formed by the liquid filling bag can be prevented. Since the gap holding body is provided to obstruct the closure, even when the liquid filling bag is deflated, the operation of the up-down moving member does not occur, and the operation can be performed smoothly. The whole amount can be poured out.
[0043]
In addition, since the gap holding member and the cylinder are integrally formed, the manufacture is easy, and the assembling operation is also simple, so that the gap holding body and the cylinder can be manufactured at low cost.
[0044]
Further, in the second means, since the liquid is introduced into the suction port also from between the legs of the gap holding member, the operation of the vertically moving member can be performed more smoothly.
[0045]
Further, in the third means, even if the liquid filling bag closes the lower end opening, the through hole formed in the cylindrical wall is not closed by each ridge, so that the liquid can be surely supplied to the suction port. Can be introduced.
[0046]
Further, in the fourth means, each support plate prevents the suction port from being closed, and the liquid is reliably introduced into the suction port by passing between the plates of the radiating plate.
[0047]
In the fifth means, the blocking of the suction port is prevented by the respective support rods and the respective arc-shaped plate portions, and the liquid can be reliably introduced into the suction port.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing one embodiment of the present invention.
FIG. 2 is a perspective view showing another example of a cylinder and a gap holder.
FIG. 3 is a perspective view showing still another example of a cylinder and a gap holding body.
FIG. 4 is a perspective view showing still another example of the cylinder and the gap holding body.
FIG. 5 is a perspective view showing still another example of the cylinder and the gap holding body.
FIG. 6 is a perspective view showing still another example of the cylinder and the gap holding body.
FIG. 7 is a perspective view showing still another example of the cylinder and the gap holding body.
FIG. 8 is a perspective view showing still another example of the cylinder and the gap holding body.
FIG. 9 is a perspective view showing still another example of the cylinder and the gap holding body.
FIG. 10 is a perspective view showing still another example of the cylinder and the gap holder.
[Explanation of symbols]
2 ... liquid filling bag, 3 ... container body, 4 ... cylinder, 5 ... vertical moving member,
6 ... Gap holder, 13 ... Cylinder peripheral wall, 14 ... Cylinder bottom wall, 15 ... Suction port,
22 ... Annular piston, 23 ... Press-down head, 32 ... Ridge, 33 ... Through-hole,
34 ... support plate part, 35 ... radiation plate part, 36 ... support rod part, 37 ... donut plate part,
38: Arc-shaped plate

Claims

A pump which is used by being attached to a container body 3 having a liquid-filled bag 2 for hermetically sealing the stored liquid, which contracts with the internal pressure being reduced by taking out the stored liquid, and which is suspended above the container body and has a bottom wall. A cylinder 4 having a suction port 15 opened at the center and an annular piston 22 slidably fitted in the cylinder are provided at the lower part, and a pressing head 23 at the upper end is projected upward from the container body to raise the cylinder. A vertically movable member 5 provided so as to be vertically movable in a biased state, wherein the liquid in the container is sucked up into the cylinder 4 by the up and down movement of the member 5 so as to be discharged from the outlet of the head 23. In the outlet pump, the outer surface of the peripheral wall 13 and the lower surface of the bottom wall 14 of the cylinder 4 are formed on the uneven surface A, and the gap holding body 6 for preventing the liquid filling bag from closing the suction port is connected to the cylinder 4. Integrally formed with the above clearance A liquid comprising a plurality of legs 29 whose upper ends are connected at equal circumferential intervals around the suction port 15 on the lower surface of the cylinder bottom wall and whose lower ends are hung down on the inner bottom of the liquid filling bag 2. Dispensing pump.

Instead of the gap holding body, the upper end is integrally connected to the periphery of the suction port 15 on the lower surface of the cylinder bottom wall 14, and the lower end is formed in a cylindrical shape with the lower end hanging down from the inner bottom of the liquid filling bag 2. A plurality of circumferentially extending ridges 32 extending vertically, and a gap holding body 6 provided with a plurality of through-holes 33 penetrating the ridges is provided in a vertical portion of the ridges of a cylindrical wall. 2. The liquid injection pump according to 1.

Instead of the gap holding body, a pair of support rods 36 are vertically provided on both sides of the suction port 15 on the lower surface of the cylinder bottom wall 14, and a donut plate-shaped portion 37 upper peripheral edge is connected to the lower surface of each support rod 36. 2. The liquid pouring pump according to claim 1, further comprising a gap holding member formed by bridging a plurality of arc-shaped plate portions between the front surface and the rear surface of each support rod portion.