JP4222464B2

JP4222464B2 - Liquid jet pump

Info

Publication number: JP4222464B2
Application number: JP2001293461A
Authority: JP
Inventors: 孝之後藤
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 2001-09-26
Filing date: 2001-09-26
Publication date: 2009-02-12
Anticipated expiration: 2021-09-26
Also published as: JP2003095361A

Description

【０００１】
【発明の属する技術分野】
本発明は液体噴出ポンプに関する。
【０００２】
【従来の技術】
液体噴出ポンプとして、装着筒により容器体口頸部に固定するとともに、下部のシリンダを容器体内に垂下し、また、シリンダ内より上方に突出したステムの上端に噴出ヘッドを嵌着して上方付勢状態で上下動可能に作動部材を設け、作動部材の上下動により装着した容器体内の液を吸上げて噴出ヘッドの噴出口より噴出する如く構成したものが知られている。
【０００３】
これらはまた、シリンダの上端を被覆して嵌着したリング状部材を設けて、作動部材を押下げた状態で係止させておくことができ、不用意な液の漏出や容器を倒した際の液の漏出を防止する如く構成している。
【０００４】
具体的に一例を挙げて説明すれば、図17に示す如く、液体噴出ポンプ1Aは装着キャップ7Aにより容器体5Aの口頸部8Aに固定するもので、容器体内へ垂下させたシリンダ2Aの上端にリング状部材3Aを嵌着している。リング状部材3Aは、シリンダ2A上端内周面との間を密に嵌着しており、ここからの液の漏出を防止している。また、シリンダ2A内より突設したステム20A の上端に噴出ヘッド21A を嵌着固定している。更に、ステム20A 及び噴出ヘッド21A を備えた作動部材4Aを押し下げた状態でリング状部材3Aの外周面に噴出ヘッド21A の周壁24A を螺着可能に構成し、この際、リング状部材3A内周面対応位置の作動部材4Aがリング状部材3A内周面に密に嵌合する如く構成している。
【０００５】
この様な状態で運搬，保管等を行うものであるが、作動部材4Aは押下げ固定されているため動かず、誤作動或いは外力による液の漏出を防止でき、また、容器が倒れた場合でもシール部分で漏出を防止できるものである。
【０００６】
この様なポンプは、シリンダ2Aの外気導入孔6Aより気体を送り込み、各シール部分の気密性を検査することが行われている。しかしながら、従来のこの種ポンプでは、噴出ヘッド21A の周壁24A をリング状部材3A外周面の所定位置に螺合させるために、リング状部材3Aの外周下部所定位置に上向き段部13A を形成している。従って、噴出ヘッド周壁24A 下面がこの上向き段部13A と密に接触してこの部分にも気密性が生じる場合があり、気密試験の際にたとえ作動部材4Aとリング状部材3A内周面とのシール部分が気密性に劣る場合であっても試験結果が正確に得られない場合があった。
【０００７】
【発明が解決しようとする課題】
本発明は上記した点に鑑みなされたもので、簡単な構造の変更により気密性試験の試験結果を正確に得られる液体噴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】
第１の手段として、以下の通り構成した。即ち、装着する容器体５内へ連通させる外気導入孔６を上部に備えたシリンダ２と、シリンダ２上端部周囲を被覆するとともに、シリンダ２内周面に第１シール部s1を介して密に嵌着したリング状をなし、且つ、下部に上向き段部13を有する螺条形成周面ａを備えたリング状部材３と、シリンダ２内よりリング状部材３中央の貫通孔19を介して突設したステム20の上端に噴出ヘッド21を嵌着させるとともに、上方付勢状態で上下動可能に設けた作動部材４とを備え、作動部材４の上下動により嵌着した容器体５内の液を吸い上げて噴出ヘッド21の噴出口26より噴出する如く構成するとともに、押下げ状態の噴出ヘッド21の周壁24を、上記上向き段部13による螺着幅の規制下に、螺条形成周面ａへの螺着が可能に構成し、且つ、螺着状態でリング状部材３内周面に作動部材４が密に嵌合して第２シール部s2を形成する如く構成した液体噴出ポンプに於いて、上記第２シール部s2を、リング状部材３及び噴出ヘッド21で形成される閉空間ｂを介して外部と連通させる連通路ｐを設けた。
【０００９】
第２の手段として、以下の通り構成した。即ち、前記第１の手段に於いて、上記リング状部材３が、シリンダ２の内周面上端部に上記第１シール部s1を介して密に嵌合させたシール筒14をドーナツ板状の頂板15裏面より垂設するとともに、頂板15内周縁より案内筒17を垂設し、且つ、頂板15外周縁より上記上向き段部13を有する螺条形成周面ａを備えた周壁18を垂設してなるリング状部材であり、上記噴出ヘッド21が、ステム20上端に下部を密嵌させた縦筒22を頂壁23裏面より垂設するとともに、頂壁23周縁部より周壁24を垂設し、且つ、縦筒22上部に基端を連通させたノズル25を周壁24を貫通して前方へ突設してなる噴出ヘッドである。
【００１０】
第３の手段として、以下の通り構成した。即ち、前記第２の手段に於いて、上記連通路ｐが、噴出ヘッド21の縦筒22外方に垂設したリブ43の下面と、リング状部材３上面との当接により規制された、噴出ヘッドの周壁24下面と上向き段部13上面との隙間44である。
【００１１】
第４の手段として、以下の通り構成した。即ち、前記第１の手段に於いて、上記連通路ｐが、噴出ヘッド21の周壁24下面に設けた凹溝33である。
【００１２】
第５の手段として、以下の通り構成した。即ち、前記第４の手段に於いて、上記凹溝33が、噴出ヘッド21の組み付け前に、プレス機35により形成した凹溝である。
【００１３】
第６の手段として、以下の通り構成した。即ち、前記第１の手段に於いて、上記連通路ｐが、リング状部材３の上向き段部13先端部から螺条形成周面ａ上端部に至る部分に設けた凹溝36である。
【００１４】
第７の手段として、以下の通り構成した。即ち、前記第１の手段に於いて、上記連通路ｐが、噴出ヘッド21の周壁24に設けた透孔37である。
【００１５】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して説明する。
【００１６】
図１は本発明液体噴出ポンプ１の一例を示すもので、該ポンプ１は、シリンダ２と、リング状部材３と、作動部材４とを備えている。
【００１７】
シリンダ２は、装着する容器体５内へ連通させる外気導入孔６を上部に備えており、装着キャップ７により下端を容器体内に垂下させて上部を容器体口頸部８に固定している。図示例では、周壁９外周上部より突設したフランジ10をパッキン11を介して容器体５の口頸部８上面に載置し、装着キャップ７のフランジ状頂板により口頸部８上面との間に挟持固定されている。
【００１８】
リング状部材３は、シリンダ２上端を被覆するとともに、第１シール部s1を介して密に嵌着したリング状をなし、且つ、螺条12の下部に上向き段部13を有する螺条形成周面ａを備えている。図示例では、シリンダ２内周面上端部に密に嵌合させたシール筒14をドーナツ板状の頂板15裏面より垂設している。この場合、シリンダ２の上端部はやや外方に拡径して形成しており、その拡径部分直下の内面にシール筒14の下端部を密に嵌合し、第１シール部s1を形成している。また、シリンダ２の拡径部内面に周方向多数の縦突条を突設し、シール筒14外周上端部に周方向多数突設した縦突条を係合させて相互の廻り止めとしている。
【００１９】
また、頂板15裏面より垂設した嵌合筒16をシリンダ２外周上端部に、上方への抜け出しを防止すべく凹凸係合手段を介して嵌合させている。更に、頂板15の内周縁より下方へ、作動部材４とのシール部を形成する案内筒17を垂設している。この案内筒17はシール筒14と兼用する構成とすくことも可能である。また、頂板15の外周縁より下方へ周壁18を垂設し、その外面を上向き段部13付きの螺条形成周面ａとして構成している。尚、この螺条形成周面は、嵌合筒16外面に形成することも可能であり、また、頂板15より新たな筒部を立設してその外周面に形成することも可能である。
【００２０】
作動部材４は、シリンダ２内よりリング状部材３中央の貫通孔19を介して突設したステム20の上端に噴出ヘッド21を嵌着させるとともに、上方付勢状態で上下動可能に設けている。
【００２１】
図示例では、ステム20の上端外周に下部を密嵌させた縦筒22を頂壁23の裏面中央部より垂設するとともに、頂壁23周縁部より周壁24を垂設し、縦筒22の上部に基端を開口したノズル25の先端を周壁24を貫通して前方へ突設し、その先端を噴出口26として開口して噴出ヘッド21を構成している。尚、図中27はリブを示す。
【００２２】
そして、作動部材４の上下動により装着した容器体５内の液を吸い上げて噴出ヘッド21の噴出口26より噴出する如く構成している。この様なポンプ機構は従来公知の構成を種々採用でき、図示例を説明すると、シリンダ２内下部に吸込弁28を、ステム20内上部に吐出弁29をそれぞれ設け、ステム20外周下端部にはシリンダ２内に嵌合する環状ピストン30を突設する。また、作動部材４の下面にコイルスプリングを介在させて常時上方に付勢させる。
【００２３】
また、押下げ状態の噴出ヘッド21の周壁24を、上記上向き段部13による螺着幅の規制下に、螺条形成周面ａへの螺着が可能に構成しており、螺着状態でリング状部材３内周面に作動部材４が密に嵌合して第２シール部s2を形成する如く構成している。
【００２４】
図示例では、案内筒17の内周面上端部を内方に突出形成し、また、噴出ヘッド21の縦筒22の上部をやや大径に形成し、この突出部分と大径部分が密に嵌合する如く構成し、この部分を第２シール部s2として構成している。また、噴出ヘッド21の周壁24内周に周設した螺条32を上記リング状部材３の螺条12に螺着可能に構成している。尚、この螺着状態で噴出ヘッド21の周壁24下面が上向き段部13に当接して螺動下降の適正な終点を得られる如く螺着幅の規制をしている。
【００２５】
本発明では、この様に構成された液体噴出ポンプに於いて、上記第２シール部s2を、リング状部材３及び噴出ヘッドで形成される閉空間ｂを介して外部へ連通させる連通路ｐを設けている。
【００２６】
この様な連通路ｐを設けることにより、ポンプの気密試験を行う際に、噴出ヘッド21の周壁24下面がリング状部材３の上向き段部13上面に密に当接している場合であっても正確な試験結果を得られる如く構成している。
【００２７】
気密試験として、例えば、図１に示す如く、作動部材４を押下げ螺着した状態で、外気導入孔６よりエアー等の気体を圧入してその減圧の如何を調べることにより行う。圧入された気体は通常では各シール部によりシールされ密閉されるため減圧しない。第１シール部s1に不良がある場合には、そこからシール筒14とシリンダ２との間、嵌合筒16とシリンダ２との間を通りリング状部材周壁18と装着キャップ７との間から外部へ漏出する。また、第２シール部s2に不良がある場合には、そこから噴出ヘッド21とリング状部材３とで構成される閉空間ｂ、螺着部分を通り、噴出ヘッド周壁24と上向き段部13との間から外部へ漏出する。従って、第２シール部s2のみに不良があった場合に、ヘッド周壁24と上向き段部13とが密に当接している場合でも、この連通路ｐより外部へ気体が漏出し、正確な試験結果が得られる如く構成している。
【００２８】
連通路ｐは種々の形態を採用でき、例えば、図１乃至図３に示す如く、噴出ヘッド21の周壁24下面に設けた凹溝33として構成することができる。凹溝33の数は、一箇所であっても、二箇所以上であっても良い。この場合、気密試験の際に第２シール部s2に不具合があった場合には、外気導入孔６より導入された気体が第２シール部s2を抜け、閉空間ｂから螺着部分を通って凹溝33より噴出し、第２シール部s2に漏れがあることが判る。
【００２９】
この様な噴出ヘッド21の周壁24下面に設けた凹溝33は、噴出ヘッドの組み付け前に、プレス機により形成することができる。例えば、図４(a) に示す如く、下面に所定の突部34を備えたプレス機35を用いて、図４(b) に示す如く、組み付け前の噴出ヘッド21を裏返した状態で上方よりプレスすることにより、図４(c) に示す如く簡単に凹溝33を形成することができる。従って、既存のポンプを利用して簡単に連通路ｐを備えたポンプを形成できるものである。
【００３０】
また、連通路ｐは、図５乃至図７に示す如く、リング状部材３の上向き段部先端部から螺条形成周面ａ上端部に至る部分に設けた凹溝36として構成することができる。この場合には、螺条形成周面ａの螺条12を縦断して凹溝36が設けられる。凹溝36の数は、同様に一箇所であっても、二箇所以上であっても良い。
【００３１】
また、連通路ｐは、図８に示す如く、噴出ヘッドの周壁24に設けた透孔37として構成しても良い。この様な透孔形態の連通路ｐは、図９に示す如く、リング状部材３の頂板15に設けた透孔38として構成しても良い。更に、図示しないが噴出ヘッド21の頂壁23に設けることも可能である。透孔の数は同様に１乃至２以上を採用できる。
【００３２】
更に、連通路ｐは、図10乃至図12に示す如く、上向き段部13上面に突設した突起39により規制された、噴出ヘッド21の周壁24下面と上向き段部13上面との隙間40として構成しても良い。この様な突起により形成する隙間形態の連通路としては、図13及び図14に示す如く、噴出ヘッド21の周壁24下面より突設した突起41により規制された、噴出ヘッド21の周壁24下面と上向き段部13上面との間の隙間42として構成しても良い。各突起の数は１乃至２以上を採用できる。
【００３３】
更に、連通路ｐは、図15乃至図16に示す如く、噴出ヘッド21の縦筒22外方に形成したリブ43の下面と、リング状部材３の頂板15上面との当接により規制された、噴出ヘッド21の周壁24下面と上向き段部13上面との隙間44として構成しても良い。リブ43の数は一箇所でも二箇所以上でも良いが、強度の点から周方向複数設けると良い。
【００３４】
【発明の効果】
以上説明した如く、本発明液体噴出ポンプは、既述構成としたことにより、気密試験を行った際に、正確に各シール部の試験結果を得られるものである。
【００３５】
また、第３の手段のポンプは、連通路ｐとして、噴出ヘッド21に設けたリブ43とリング状部材３上面との当接により規制された、噴出ヘッド周壁24下面と上向き段部13上面との隙間44を採用しているので、構造が極めて簡単であるとともに、周方向どの位置に設けても機能するため形成位置の規制が少なく、その形成も容易で、形成位置を誤ったことによる連通路としての機能不良を引き起こす虞がない。
【００３６】
また、第４の手段では、連通路ｐとして噴出ヘッド周壁24下面に設けた凹溝33を採用しているので、構造が極めて簡単であるとともに、同様に周方向どの位置に設けても機能するため形成位置の規制が少なく、その形成も容易で、形成位置を誤ったことによる連通路としての機能不良を引き起こす虞がない。
【００３７】
また、第５の手段のポンプは、既存のポンプを利用して連通路ｐを備えたポンプを極めて簡単に形成できる利点を兼ね備えている。
【００３８】
また、第６の手段のポンプは、連通路として、リング状部材３の上向き段部13先端部から螺条形成周面ａ上端部に至る部分に設けた凹溝36を採用しているので、螺条形成周面ａの螺条12を縦断して凹溝36が設けられるため、更に確実な外部との連通が可能となる。
【００３９】
また、第７の手段のポンプは、連通路ｐとして、噴出ヘッド周壁24に設けた透孔37を採用しているので、その形成が容易であり、また、この場合も既存のポンプを利用して後加工で連通路ｐを備えたポンプを簡単に形成できる利点がある。
【図面の簡単な説明】
【図１】本発明の一実施例を示す一部切欠要部側面図である。
【図２】同実施例の連通路部分の要部拡大断面図である。
【図３】同実施例の連通路部分の要部拡大正面図である。
【図４】同実施例の連通路を形成する方法を説明する説明図である。
【図５】本発明の他の実施例を示す一部切欠要部側面図である。
【図６】同実施例の連通路部分の要部拡大断面図である。
【図７】同実施例の連通路部分の要部拡大正面図である。
【図８】本発明の更に他の実施例を示す一部切欠要部側面図である。
【図９】本発明の更に他の実施例を示す一部切欠要部側面図である。
【図１０】本発明の更に他の実施例を示す一部切欠要部側面図である。
【図１１】同実施例の連通路部分の要部拡大断面図である。
【図１２】同実施例の連通路部分の要部拡大正面図である。
【図１３】本発明の更に他の実施例を示す連通路部分の要部拡大断面図である。
【図１４】同実施例の連通路部分の要部拡大正面図である。
【図１５】本発明の更に他の実施例を示す一部切欠要部側面図である。
【図１６】同実施例の連通路部分の要部拡大断面図である。
【図１７】従来のポンプの一例を示す一部切欠要部側面図である。
【符号の説明】
２…シリンダ、３…リング状部材、４…作動部材、５…容器体、
６…外気導入孔、13…上向き段部、14…シール筒、15…頂板、17…案内筒、
18…リング状部材周壁、19…貫通孔、20…ステム、21…噴出ヘッド、
22…縦筒、23…噴出ヘッド頂壁、24…噴出ヘッド周壁、25…ノズル、
26…噴出口、33…凹溝、35…プレス機、36…凹溝、43…リブ、44…隙間、
ａ…螺条形成周面、ｂ…閉空間、s1…第１シール部、s2…第２シール部、
ｐ…連通路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid jet pump.
[0002]
[Prior art]
As a liquid ejection pump, it is fixed to the container neck and neck by a mounting cylinder, the lower cylinder is suspended in the container body, and the ejection head is fitted to the upper end of the stem that protrudes upward from the inside of the cylinder. There is known a structure in which an operating member is provided so as to be movable up and down in an energized state, and the liquid in the container body mounted by the vertical movement of the operating member is sucked up and ejected from the ejection port of the ejection head.
[0003]
They can also be provided with a ring-shaped member that covers and fits the upper end of the cylinder and keeps the actuating member pressed down. The liquid is prevented from leaking out.
[0004]
Specifically, as shown in FIG. 17, the liquid ejection pump 1A is fixed to the mouth neck portion 8A of the container body 5A by the mounting cap 7A, and the upper end of the cylinder 2A suspended in the container body. A ring-shaped member 3A is fitted to the base. The ring-shaped member 3A is closely fitted between the upper end inner peripheral surface of the cylinder 2A and prevents leakage of liquid from here. Further, an ejection head 21A is fitted and fixed to the upper end of a stem 20A projecting from the cylinder 2A. Furthermore, the peripheral wall 24A of the ejection head 21A is configured to be screwed onto the outer peripheral surface of the ring-shaped member 3A in a state where the operating member 4A provided with the stem 20A and the ejection head 21A is pushed down. The actuating member 4A at the surface-corresponding position is configured to closely fit the inner peripheral surface of the ring-shaped member 3A.
[0005]
Although it is transported and stored in such a state, the operating member 4A is pressed down and fixed, so it does not move, preventing malfunction or leakage of liquid due to external force, and even if the container falls down Leakage can be prevented at the seal part.
[0006]
In such a pump, gas is sent from the outside air introduction hole 6A of the cylinder 2A, and the airtightness of each seal portion is inspected. However, in this type of conventional pump, in order to screw the peripheral wall 24A of the ejection head 21A into a predetermined position on the outer peripheral surface of the ring-shaped member 3A, an upward stepped portion 13A is formed at a predetermined position on the outer peripheral lower portion of the ring-shaped member 3A. Yes. Therefore, the lower surface of the jet head peripheral wall 24A may be in close contact with the upward stepped portion 13A, resulting in airtightness in this portion, and even during the airtight test, the operating member 4A and the ring-shaped member 3A inner peripheral surface Even when the seal portion is inferior in airtightness, the test result may not be obtained accurately.
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described points, and proposes a liquid jet pump that can accurately obtain a test result of an airtightness test by changing a simple structure.
[0008]
[Means for Solving the Problems]
The first means is configured as follows. That is, the cylinder 2 provided with the outside air introduction hole 6 communicating with the inside of the container body 5 to be attached and the periphery of the upper end portion of the cylinder 2 are covered, and the inner peripheral surface of the cylinder 2 is tightly connected to the inner peripheral surface via the first seal portion s1. A ring-shaped member 3 having a thread-shaped peripheral surface a having an upwardly-shaped stepped portion 13 in the lower part and a ring-shaped member 3 protruding from the inside of the cylinder 2 through a through-hole 19 at the center of the ring-shaped member 3. The ejection head 21 is fitted on the upper end of the stem 20 provided, and the working member 4 is provided so as to be movable up and down in an upward biased state, and the liquid in the container body 5 fitted by the vertical movement of the working member 4 is provided. And the peripheral wall 24 of the ejected head 21 in the pressed-down state is screw-formed peripheral surface a under the restriction of the screwing width by the upward stepped portion 13. The ring-shaped part can be screwed onto 3 In the liquid jet pump constructed so that the operation member 4 is closely fitted to the inner peripheral surface to form the second seal portion s2, the second seal portion s2 is formed by the ring-shaped member 3 and the jet head 21. A communication path p communicating with the outside through the formed closed space b was provided .
[0009]
The second means is configured as follows. That is, in the first means, the ring-shaped member 3 has a donut plate-shaped seal cylinder 14 closely fitted to the upper end portion of the inner peripheral surface of the cylinder 2 via the first seal portion s1. The guide plate 17 is suspended from the inner periphery of the top plate 15 and the peripheral wall 18 is provided with a thread-forming peripheral surface a having the upward stepped portion 13 from the outer periphery of the top plate 15. The jet head 21 has a vertical cylinder 22 with a lower part tightly fitted to the upper end of the stem 20 and is suspended from the rear surface of the top wall 23, and a peripheral wall 24 is suspended from the peripheral edge of the top wall 23. and, and, a vertical tube 22 nozzle 25 upper part communicates proximal through the peripheral wall 24 Ru jet head der obtained by projecting forward.
[0010]
The third means was configured as follows. That is, in the second means, the communication path p is restricted by the contact between the lower surface of the rib 43 suspended from the vertical cylinder 22 of the ejection head 21 and the upper surface of the ring-shaped member 3. Ru gap 44 der the peripheral wall 24 the lower surface and an upward stepped portion 13 upper surface of the injection head.
[0011]
The fourth means is configured as follows. That is, at the first unit, the communication passage p is Ru grooves 33 der provided in the peripheral wall 24 the lower surface of the injection head 21.
[0012]
The fifth means is configured as follows. That is, at the fourth means, the recessed groove 33, before assembly of the injection head 21, Ru groove der formed by press 35.
[0013]
The sixth means is configured as follows. That is, at the first unit, the communication passage p is Ru grooves 36 der provided in a portion leading to the threaded forming peripheral surface a top end from the upward stepped portion 13 distal portion of the ring-shaped member 3.
[0014]
The seventh means is configured as follows. That is, at the first unit, the communication passage p is Ru holes 37 der provided in the peripheral wall 24 of the injection head 21.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 shows an example of a liquid ejection pump 1 according to the present invention. The pump 1 includes a cylinder 2, a ring-shaped member 3, and an operating member 4.
[0017]
The cylinder 2 is provided with an outside air introduction hole 6 communicating with the inside of the container body 5 to be attached, and the lower end is suspended in the container body by the attachment cap 7 and the upper part is fixed to the container body neck 8. In the illustrated example, a flange 10 projecting from the outer peripheral upper portion of the peripheral wall 9 is placed on the upper surface of the mouth neck portion 8 of the container body 5 via the packing 11, and between the upper surface of the mouth neck portion 8 by the flange-like top plate of the mounting cap 7. It is clamped and fixed to.
[0018]
The ring-shaped member 3 covers the upper end of the cylinder 2, forms a ring shape that is closely fitted via the first seal portion s 1, and has a thread forming circumference having an upward stepped portion 13 below the thread 12. A surface a is provided. In the illustrated example, a seal cylinder 14 closely fitted to the upper end of the inner peripheral surface of the cylinder 2 is suspended from the back surface of the top plate 15 having a donut plate shape. In this case, the upper end portion of the cylinder 2 is formed with a slightly increased diameter outward, and the lower end portion of the seal cylinder 14 is closely fitted to the inner surface immediately below the expanded diameter portion to form the first seal portion s1. is doing. Further, a large number of circumferential ridges project from the inner surface of the enlarged diameter portion of the cylinder 2, and a plurality of circumferential ridges project from the circumferential upper end of the outer periphery of the seal cylinder 14 are engaged with each other to prevent mutual rotation.
[0019]
Further, a fitting cylinder 16 suspended from the back surface of the top plate 15 is fitted to the upper end of the outer periphery of the cylinder 2 through a concave / convex engaging means to prevent upward slipping. Further, a guide cylinder 17 is formed below the inner peripheral edge of the top plate 15 so as to form a seal portion with the operating member 4. The guide cylinder 17 can also be configured to be used as the seal cylinder 14. Further, a peripheral wall 18 is suspended downward from the outer peripheral edge of the top plate 15, and the outer surface thereof is configured as a thread forming peripheral surface a with an upward stepped portion 13. The thread-forming peripheral surface can be formed on the outer surface of the fitting tube 16, or a new tube portion can be erected from the top plate 15 and formed on the outer peripheral surface.
[0020]
The actuating member 4 is provided so that the ejection head 21 is fitted to the upper end of a stem 20 projecting from the inside of the cylinder 2 via the through-hole 19 at the center of the ring-shaped member 3 and can be moved up and down in an upward biased state. .
[0021]
In the illustrated example, a vertical cylinder 22 having a lower portion closely fitted to the outer periphery of the upper end of the stem 20 is suspended from the central portion of the back surface of the top wall 23, and a peripheral wall 24 is suspended from the peripheral edge of the top wall 23. The tip of a nozzle 25 having a base end opened at the top is projected forward through the peripheral wall 24, and the tip is opened as a jet outlet 26 to constitute a jet head 21. In the figure, reference numeral 27 denotes a rib.
[0022]
And it is comprised so that the liquid in the container body 5 with which the operation member 4 was mounted | worn may be sucked up and ejected from the ejection port 26 of the ejection head 21. FIG. Such a pump mechanism can employ various conventionally known configurations. In the illustrated example, a suction valve 28 is provided in the lower part of the cylinder 2 and a discharge valve 29 is provided in the upper part of the stem 20, respectively. An annular piston 30 that fits in the cylinder 2 is projected. Further, a coil spring is interposed on the lower surface of the actuating member 4 to constantly bias upward.
[0023]
In addition, the peripheral wall 24 of the ejected head 21 in the pressed state is configured to be screwed onto the thread forming peripheral surface a under the restriction of the screwing width by the upward stepped portion 13, and in the screwed state The operation member 4 is closely fitted to the inner peripheral surface of the ring-shaped member 3 so as to form the second seal portion s2.
[0024]
In the illustrated example, the upper end portion of the inner peripheral surface of the guide cylinder 17 is formed to protrude inward, and the upper portion of the vertical cylinder 22 of the ejection head 21 is formed to have a slightly large diameter, and the protruding portion and the large diameter portion are densely formed. It is configured so as to be fitted, and this portion is configured as a second seal portion s2. Further, a screw thread 32 provided around the inner periphery of the peripheral wall 24 of the ejection head 21 is configured to be screwable to the screw thread 12 of the ring-shaped member 3. In this screwing state, the screwing width is restricted so that the lower surface of the peripheral wall 24 of the ejection head 21 is in contact with the upward stepped portion 13 and an appropriate end point of screwing down is obtained.
[0025]
In the present invention, in the liquid jet pump configured as described above, the communication path p for communicating the second seal portion s2 to the outside through the closed space b formed by the ring-shaped member 3 and the jet head is provided. Provided.
[0026]
By providing such a communication path p, even when the airtight test of the pump is performed, the lower surface of the peripheral wall 24 of the ejection head 21 is in close contact with the upper surface of the upward stepped portion 13 of the ring-shaped member 3. It is configured to obtain accurate test results.
[0027]
As an airtight test, for example, as shown in FIG. 1, in a state where the operating member 4 is pressed down and screwed, a gas such as air is press-fitted from the outside air introduction hole 6 and the pressure reduction is examined. Since the injected gas is normally sealed and sealed by each seal portion, the pressure is not reduced. If there is a defect in the first seal portion s1, it passes between the seal cylinder 14 and the cylinder 2 and between the fitting cylinder 16 and the cylinder 2 from between the ring-shaped member peripheral wall 18 and the mounting cap 7. Leak outside. Further, when there is a defect in the second seal portion s2, it passes through the closed space b formed by the ejection head 21 and the ring-shaped member 3 and the screwed portion, and the ejection head peripheral wall 24 and the upward stepped portion 13 Leak from outside to outside. Therefore, when only the second seal portion s2 is defective, even if the head peripheral wall 24 and the upward stepped portion 13 are in close contact with each other, gas leaks to the outside from the communication path p, and an accurate test is performed. It is configured so that a result can be obtained.
[0028]
Various forms can be adopted for the communication path p. For example, as shown in FIGS. 1 to 3, the communication path p can be configured as a concave groove 33 provided on the lower surface of the peripheral wall 24 of the ejection head 21. The number of the concave grooves 33 may be one or two or more. In this case, if there is a malfunction in the second seal portion s2 during the airtight test, the gas introduced from the outside air introduction hole 6 passes through the second seal portion s2 and passes through the screwed portion from the closed space b. It can be seen that there is a leak in the second seal portion s2 from the concave groove 33.
[0029]
The concave groove 33 provided on the lower surface of the peripheral wall 24 of the ejection head 21 can be formed by a press machine before the ejection head is assembled. For example, as shown in FIG. 4 (a), using a press machine 35 having a predetermined projection 34 on the lower surface, as shown in FIG. 4 (b), the ejection head 21 before assembly is turned over from above. By pressing, the concave groove 33 can be easily formed as shown in FIG. Therefore, a pump having the communication path p can be easily formed using an existing pump.
[0030]
Further, the communication path p can be configured as a concave groove 36 provided in a portion extending from the tip of the upward stepped portion of the ring-shaped member 3 to the upper end of the thread forming peripheral surface a as shown in FIGS. . In this case, a groove 36 is provided by longitudinally cutting the thread 12 on the thread forming peripheral surface a. Similarly, the number of the concave grooves 36 may be one, or two or more.
[0031]
Further, the communication path p may be configured as a through hole 37 provided in the peripheral wall 24 of the ejection head, as shown in FIG. Such a through hole-shaped communication passage p may be configured as a through hole 38 provided in the top plate 15 of the ring-shaped member 3 as shown in FIG. Further, although not shown, it can be provided on the top wall 23 of the ejection head 21. Similarly, the number of through holes may be 1 to 2 or more.
[0032]
Further, as shown in FIGS. 10 to 12, the communication path p is defined as a gap 40 between the lower surface of the peripheral wall 24 of the ejection head 21 and the upper surface of the upward step portion 13, which is regulated by a protrusion 39 protruding from the upper surface of the upward step portion 13. It may be configured. As shown in FIGS. 13 and 14, the communication path in the form of a gap formed by such protrusions includes a lower surface of the peripheral wall 24 of the ejection head 21, which is regulated by a protrusion 41 protruding from the lower surface of the peripheral wall 24 of the ejection head 21. It may be configured as a gap 42 between the upper surface of the upward stepped portion 13. The number of each protrusion can be 1 to 2 or more.
[0033]
Further, as shown in FIGS. 15 to 16, the communication path p is restricted by contact between the lower surface of the rib 43 formed outside the vertical cylinder 22 of the ejection head 21 and the upper surface of the top plate 15 of the ring-shaped member 3. The gap 44 between the lower surface of the peripheral wall 24 of the ejection head 21 and the upper surface of the upward stepped portion 13 may be configured. The number of ribs 43 may be one or two or more, but a plurality of ribs 43 are preferably provided in the circumferential direction from the viewpoint of strength.
[0034]
【The invention's effect】
As described above, the liquid jet pump according to the present invention has the above-described configuration, so that when the airtight test is performed, the test result of each seal portion can be obtained accurately.
[0035]
The pump of the third means includes, as the communication path p, a lower surface of the ejection head peripheral wall 24 and an upper surface of the upward stepped portion 13, which are regulated by contact between the rib 43 provided on the ejection head 21 and the upper surface of the ring-shaped member 3. Since the gap 44 is adopted, the structure is extremely simple, and it can function at any position in the circumferential direction. There is no possibility of causing a malfunction as a passage.
[0036]
Further, in the fourth means, since the concave groove 33 provided on the lower surface of the ejection head peripheral wall 24 is adopted as the communication path p, the structure is very simple, and similarly functions at any position in the circumferential direction. Therefore, there are few restrictions on the formation position, the formation is easy, and there is no possibility of causing a malfunction as a communication path due to an incorrect formation position.
[0037]
Further, the pump of the fifth means has an advantage that a pump having the communication path p can be formed very easily using an existing pump.
[0038]
Further, the pump of the sixth means employs a concave groove 36 provided in a portion extending from the tip of the upward stepped portion 13 of the ring-shaped member 3 to the upper end of the thread forming peripheral surface a as the communication path. Since the concave groove 36 is provided by longitudinally cutting the thread 12 on the thread forming peripheral surface a, further reliable communication with the outside becomes possible.
[0039]
Further, since the pump of the seventh means employs the through hole 37 provided in the ejection head peripheral wall 24 as the communication passage p, the formation thereof is easy, and in this case also, an existing pump is used. Thus, there is an advantage that a pump having the communication path p can be easily formed by post-processing.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of an essential part of an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of a communication path portion of the embodiment.
FIG. 3 is an enlarged front view of a main part of a communication path portion of the embodiment.
FIG. 4 is an explanatory view illustrating a method for forming a communication path according to the embodiment.
FIG. 5 is a partially cut-away side view of another embodiment of the present invention.
FIG. 6 is an enlarged cross-sectional view of a main part of the communication path portion of the embodiment.
FIG. 7 is an enlarged front view of a main part of a communication path portion of the embodiment.
FIG. 8 is a partially cutaway side view of a main part showing still another embodiment of the present invention.
FIG. 9 is a partially cutaway side view of a main portion showing still another embodiment of the present invention.
FIG. 10 is a partially cutaway side view of a main part showing still another embodiment of the present invention.
FIG. 11 is an enlarged cross-sectional view of a main part of the communication path portion of the embodiment.
FIG. 12 is an enlarged front view of the main part of the communication path portion of the embodiment.
FIG. 13 is an enlarged cross-sectional view of a main part of a communication path portion showing still another embodiment of the present invention.
FIG. 14 is an enlarged front view of the main part of the communication path portion of the embodiment.
FIG. 15 is a side view of a partly cutaway main portion showing still another embodiment of the present invention.
FIG. 16 is an enlarged cross-sectional view of a main part of the communication path portion of the embodiment.
FIG. 17 is a partially cutaway side view of an example of a conventional pump.
[Explanation of symbols]
2 ... Cylinder, 3 ... Ring-shaped member, 4 ... Actuating member, 5 ... Container body,
6 ... Outside air introduction hole, 13 ... Upward stepped portion, 14 ... Seal tube, 15 ... Top plate, 17 ... Guide tube,
18 ... Ring-shaped member peripheral wall, 19 ... Through hole, 20 ... Stem, 21 ... Ejection head,
22 ... Vertical cylinder, 23 ... Ejection head top wall, 24 ... Ejection head peripheral wall, 25 ... Nozzle,
26 ... jet, 33 ... concave, 35 ... press machine, 36 ... concave, 43 ... rib, 44 ... gap,
a ... thread forming peripheral surface, b ... closed space, s1 ... first seal part, s2 ... second seal part,
p ... Communication passage

Claims

A cylinder 2 provided with an outside air introduction hole 6 communicating with the inside of the container body 5 to be attached and the periphery of the upper end of the cylinder 2 are covered, and the cylinder 2 is closely fitted to the inner peripheral surface via the first seal portion s1. The ring-shaped member 3 having a thread-shaped peripheral surface a having an upward stepped portion 13 in the lower portion and a through-hole 19 in the center of the ring-shaped member 3 is provided from the inside of the cylinder 2. The ejecting head 21 is fitted to the upper end of the stem 20, and the working member 4 is provided so as to be movable up and down in the upward biased state, and sucks up the liquid in the container body 5 fitted by the vertical movement of the working member 4. In this way, the peripheral wall 24 of the ejected head 21 in the pressed-down state is placed on the thread-forming peripheral surface a under the restriction of the screwing width by the upward stepped portion 13. The ring-shaped member 3 can be screwed and can be screwed. In the liquid jet pump configured such that the operating member 4 is closely fitted to the surface to form the second seal portion s2, the second seal portion s2 is formed by the ring-shaped member 3 and the jet head 21. A seal cylinder 14 is provided in which a communication passage p communicating with the outside through a closed space b is provided , and the ring-shaped member 3 is closely fitted to the upper end portion of the inner peripheral surface of the cylinder 2 via the first seal portion s1. the well as vertically from the top plate 15 the back surface of the donut-shaped, and vertically the guide tube 17 from the periphery in the top plate 15, and, with a threaded formation circumferential surface a of from the top plate 15 outer peripheral edge having the upwardly stepped portion 13 a ring-shaped member formed by vertically the circumferential wall 18, the injection head 21, a vertical tube 22 which is closely fitted to the lower stem 20 the upper end as well as vertically from the top wall 23 the back side, from the top wall 23 periphery and vertically to the peripheral wall 24, and, butt the vertical tube 22 nozzle 25 upper part communicates proximal forward through the peripheral wall 24 Liquid jet pump, which is a by formed by injection head.

The communication path p is the ejection head twenty one Vertical cylinder twenty two Ribs hanging outward 43 The peripheral wall of the ejection head regulated by the contact between the lower surface of the ring-shaped member 3 and the upper surface of the ring-shaped member 3 twenty four Bottom and upward step 13 Clearance with the top surface 44 The liquid jet pump according to claim 1.

A cylinder 2 provided with an outside air introduction hole 6 communicating with the inside of the container body 5 to be attached, covers the periphery of the upper end portion of the cylinder 2, and the first seal portion is provided on the inner peripheral surface of the cylinder 2. s1 It has a ring shape that fits tightly through, and has an upward step at the bottom. 13 A ring-shaped member 3 having a thread-forming circumferential surface a having a through hole, and a through-hole in the center of the ring-shaped member 3 from within the cylinder 2 19 Stem protruding through 20 The jet head at the top of the twenty one And an actuating member 4 provided so as to be movable up and down in an upward biased state, and sucking up the liquid in the container body 5 fitted by the up and down movement of the actuating member 4 and ejecting head twenty one Spout 26 The ejecting head is configured to be ejected more and is in a depressed state. twenty one Wall of twenty four The upward step 13 The threading width of the ring-shaped member 3 is tightly fitted to the inner circumferential surface of the ring-shaped member 3 in a screwed state. 2 seal part s2 In the liquid jet pump configured to form the second seal portion, s2 The ring-shaped member 3 and the ejection head twenty one A communication passage p that communicates with the outside through a closed space b formed by the discharge head is provided. twenty one Wall of twenty four Groove on the bottom surface 33 A liquid jet pump characterized by being.

Groove 33 But the spout head twenty one Before assembling the press machine 35 The liquid ejection pump according to claim 3, wherein the liquid ejection pump is a concave groove formed by the step.

A cylinder 2 provided with an outside air introduction hole 6 communicating with the inside of the container body 5 to be attached, covers the periphery of the upper end portion of the cylinder 2, and the first seal portion is provided on the inner peripheral surface of the cylinder 2. s1 It has a ring shape that fits tightly through, and has an upward step at the bottom. 13 A ring-shaped member 3 having a thread-forming circumferential surface a having a through hole, and a through-hole in the center of the ring-shaped member 3 from within the cylinder 2 19 Stem protruding through 20 The jet head at the top of the twenty one And an actuating member 4 provided so as to be movable up and down in an upward biased state, and sucking up the liquid in the container body 5 fitted by the up and down movement of the actuating member 4 and ejecting head twenty one Spout 26 The ejecting head is configured to be ejected more and is in a depressed state. twenty one Wall of twenty four The upward step 13 The threading width of the ring-shaped member 3 is tightly fitted to the inner circumferential surface of the ring-shaped member 3 in a screwed state. 2 seal part s2 In the liquid jet pump configured to form the second seal portion, s2 The ring-shaped member 3 and the ejection head twenty one A communication path p that communicates with the outside through a closed space b formed by 13 Concave groove provided in the portion from the tip to the upper end of the thread forming peripheral surface a 36 A liquid jet pump characterized by being.

A cylinder 2 provided with an outside air introduction hole 6 communicating with the inside of the container body 5 to be attached, covers the periphery of the upper end portion of the cylinder 2, and the first seal portion is provided on the inner peripheral surface of the cylinder 2. s1 It has a ring shape that fits tightly through, and has an upward step at the bottom. 13 A ring-shaped member 3 having a thread-forming peripheral surface a having a through hole, and a through-hole in the center of the ring-shaped member 3 from within the cylinder 2 19 Stem protruding through 20 The jet head at the top of the twenty one And an actuating member 4 provided so as to be movable up and down in an upward biased state, and sucking up the liquid in the container body 5 fitted by the up and down movement of the actuating member 4 and ejecting head twenty one Spout 26 The jet head is configured to be ejected and pressed down. twenty one Wall of twenty four The upward step 13 The threading width of the ring-shaped member 3 is tightly fitted to the inner circumferential surface of the ring-shaped member 3 in a screwed state. 2 seal part s2 In the liquid jet pump configured to form the second seal portion, s2 The ring-shaped member 3 and the ejection head twenty one A communication passage p that communicates with the outside through a closed space b formed by the discharge head is provided. twenty one Wall of twenty four Through hole provided in 37 A liquid ejection pump characterized by