JP4680375B2

JP4680375B2 - Spray nozzle mounting structure and mounting method

Info

Publication number: JP4680375B2
Application number: JP2000358842A
Authority: JP
Inventors: 健司大西; 治朗首藤
Original assignee: Taisei Kako Co Ltd
Current assignee: Taisei Kako Co Ltd
Priority date: 2000-11-27
Filing date: 2000-11-27
Publication date: 2011-05-11
Anticipated expiration: 2020-11-27
Also published as: JP2002160780A

Description

【０００１】
【発明の属する技術分野】
本発明は、咽喉用スプレー容器などのスプレーノズル（アクチュエータノズル）の取付構造並びに取付方法に関する。
【０００２】
【従来の技術】
従来のアクチュエータノズルの固定方法としては、アクチュエータにノズルを差し込んだ後に片側をヒートシールする方法や、アクチュエータに形成したリブにノズルを圧入する方法が一般的である。
【０００３】
【発明が解決しようとする課題】
しかし、上記従来のいずれの方法によっても、ノズルの保持力が弱く、使用中に抜けが発生することがあるとともに、ヒートシールによりノズルチューブを変形させ、チューブ内の通路を小さくしてしまい、場合によってはノズルを閉塞してしまうことがある。
【０００４】
また、咽喉用スプレー容器などのスプレーノズルは、抜歯、抜糸、歯石除去等の局部麻酔（表皮麻酔を含む）等にも使用されており、患部めがけて直接、噴霧・ジェット又は滴下して使用しているが、特に噴霧する場合に、ノズル内部に大きな圧力が生じるため、ノズルの抜けが発生し易い。
【０００５】
また、従来、ノズルは熔着或いは圧入で嵌合させていることから、複数回の使用や、使用後の消毒時に、嵌合部への内容物や消毒剤の浸漬がおこり、ノズルが抜けやすくなり、ノズル内圧等により容易に抜けが発生する。
【０００６】
そこで、本発明は、取付作業性に優れるものでありながら、ノズルを局部的に圧縮することなく強く保持できるようにして、複数回の使用や使用後の消毒時にもノズルの抜けを防止することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は、上記目的を達成するために、次の技術的手段を講じた。
【０００８】
即ち、本発明は、長尺筒状のスプレーノズルをチャック部材を介して吐出口に取付固定してなるスプレーノズルの取付構造を提供するとともに、長尺筒状のスプレーノズルをチャック部材を介して吐出口に取付固定するためのスプレーノズルの取付方法を提供する。なお、上記吐出口は、上記ノズルが取付けられるアクチュエータやキャップなどのノズル被取付部材に設けられる。
【０００９】
上記本発明のスプレーノズルの取付構造において、前記チャック部材は、前記ノズルが挿通される挿通孔を有し、チャック部材が吐出口内に押し込まれるに従って前記挿通孔が縮径して前記ノズルを締付保持し、該ノズルを保持した状態でチャック部材が吐出口内に固定されているものとすることができる。なお、チャック部材は側部に複数のスリットが形成された筒状構造であってもよく、断面Ｃ字状に構成することも可能である。また、挿通孔は、チャック部材を軸方向に貫通していればよく、径方向に開放された凹溝状であってもよい。また、挿通孔の内径、特に縮径して締付保持する部位の内径は、好ましくはノズル外径とほぼ同径に形成しておくのが良い。チャック部材の固定手段は適宜の方法を作用できるが、好ましくは、吐出口内面に形成した段部などの被係止部と、チャック部材外周に形成した段部などの係止部との係合によってチャック部材を吐出口内に固定することができる。
【００１０】
上記本発明のスプレーノズルの取付構造によれば、簡易な構造で取付作業性に優れるものでありながらも、チャック部材の所定部位を縮径させることでノズルを周方向略全周にわたりほぼ均一な力で締付保持することができ、ノズル内通路を押し潰したり閉塞させることなく、十分なノズルの保持力が得られ、使用中にノズルが抜けることが無くなるとともに、ノズル内通路が確保されるためノズルからの噴霧が円滑に行われる。
【００１１】
また、上記吐出口内周面は、先端側から基端側に至るに従って徐々に縮径するテーパー面を有するものとすることができる。これによれば、吐出口にチャック部材を押し込むことにより、該チャック部材に上記テーパー面による縮径方向の締付力を作用させることができる。なお、該テーパー面よりも基端側に、ノズル外径とほぼ同径のノズル挿通孔を設け、該ノズル挿通孔に吐出流体（塗布薬液等）を適宜のポンプ機構等によって供給することができる。
【００１２】
また、チャック部材は、基端側の筒状の締付部と、該締付部の先端部に連設された筒状の延長部とを備えることができる。この場合、ノズル挿通孔は前記締付部と延長部とにわたって設けることができる。また、前記締付部の外周面は、前記テーパー面に対応するテーパー状に構成することができる。なお、かかる締付部外周面のテーパー構造には、外周面が軸方向全体にわたってテーパー状に形成されているものの他、締付部の外周面の軸方向一部（例えば、基端部）のみにテーパー面を設けたものをも含む。
【００１３】
さらに、上記締付部は縮径変形可能に構成することができ、特に基端側が縮径変形可能な構成を採用するのが良い。例えば、筒状の締付部の周方向複数箇所に、該締付部の基端部から先端側に向けて延びるスリットを設けることで締付部をその基端側が縮径変形可能に構成できる。その他、締付部を弾性材料により形成することによっても、該締付部を縮径変形可能に構成できる。
【００１４】
また、上記延長部を締付部よりも小径とし、これにより締付部の先端に段部を形成することができる。そして、該段部を吐出口先端に形成された内向き凸部に係止させ、これによりチャック部材を吐出口内に固定することができる。上記内向き凸部は、吐出口内周面の全周に亘る環状リブにより構成することができる他、周方向に間隔を空けて設けられた複数の突起により構成することもできる。該内向き凸部は、吐出口を有するノズル被取付部材（アクチュエータなど）が樹脂成形品である場合、成形上のアンダーカットとなるものである。なお、上記内向き凸部以外には、吐出口内にアンダーカット部が存在しないようにするのが好ましい。また、上記内向き凸部は、チャック部材の装着後の吐出口先端のヒートシールにより形成された内向きフランジであってもよい。
【００１５】
上記延長部の先端には外向きフランジを設けることができる。そして、この外向きフランジを、吐出口先端に近接させるとともに、外向きフランジの外径を、吐出口先端開口の内径とほぼ同一若しくは該内径よりも大径であるようにすることで、外向きフランジにより吐出口先端開口を覆い、埃などが先端開口に入り込むことが防止される。さらに、上記外向きフランジを設けることで、チャック部材の先端面の面積が増大するため、チャック部材を吐出口内に押し込む際の作業性が良好なものとなる。
【００１６】
上記本発明のスプレーノズルの取付方法において、吐出口内周面には、先端側から基端側に至るに従って徐々に縮径するテーパー面と、該テーパー面よりも先端側に位置して径方向内方に突出する凸部とを形成しておき、前記チャック部材は、基端側の筒状の締付部と、該締付部の先端部に連設された筒状の延長部とを備え、前記締付部と延長部とにわたって前記ノズルが挿通される挿通孔を設け、前記締付部の外周面を、前記テーパー面に対応するテーパー状とし、該締付部を縮径変形可能に構成しておくとともに、前記延長部を締付部よりも小径とし、これにより締付部の先端に段部を形成しておくことができる。そして、これら分解状態のノズル並びにチャック部材を、次の工程で吐出口に取付けることができる。即ち、前記ノズルをチャック部材の挿通孔に挿通し、該ノズルの基端部を吐出口に挿入するとともに、前記チャック部材を吐出口内に押し込んで締付部のテーパー状外周面を吐出口のテーパー状内周面との接触により締付部を縮径して前記ノズルを締付保持し、該ノズルを保持した状態でチャック部材の前記段部を吐出口の前記凸部に係止することにより、チャック部材を吐出口内に固定することができる。
【００１７】
かかる本発明の取付方法によれば、特別な工具や工作機器等を用いずとも、ノズルをチャック部材に挿通して吐出口に差し込むとともに、チャック部材を吐出口に押し込んで係止させると、チャック部材の締付部が縮径されてノズルを全周にわたって均一に締付保持し、ノズルを押し潰すことなく強い力で保持させることができ、使用中にノズルが抜け落ちることもなく、また、ノズルからの薬液等の流体の吐出が円滑に行われるようになる。
【００１８】
さらに、前記段部を吐出口の前記凸部に係止した後、吐出口の前記凸部の先端側をヒートシールすることにより、前記段部により深く係止する内向きフランジを形成することにより、確実にチャック部材を吐出口内に固定することができるとともに、ヒートシールによる吐出口先端側の加熱変形により、該吐出口先端部と、チャック部材の上記段部との密着性がより良好なものとなり、この部位の気密性・液密性が向上する。
【００１９】
また、チャック部材の延長部の先端に外向きフランジを形成しておき、該外向きフランジを押圧することによりチャック部材を吐出口内に押し込み、ヒートシールにより形成される内向きフランジが前記外向きフランジに近接するとともに、外向きフランジの外径が、内向きフランジの内径とほぼ同径もしくは該内径よりも大径となるようにすることもできる。これによれば、上記取付構造と同様に、外向きフランジによって埃等が吐出口先端開口に入り込むことを防止し得るとともに、チャック部材の押し込み作業性が良好なものとなる。
【００２０】
【発明の実施の形態】
以下、本発明の好適な実施の形態を図面に基づいて説明する。
【００２１】
図１〜図４は本発明の一実施形態にかかるスプレーノズルの取付構造並びに取付方法を示しており、該取付構造並びに取付方法は、ヨウ素溶液などの薬液を咽喉部位に塗布するための咽喉用スプレー容器などに好適に採用できる。
【００２２】
本実施形態のスプレーノズルの取付構造は、長尺円筒状のスプレーノズル１をチャック部材２を介してアクチュエータ３の吐出口４に取付固定してなるものである。なお、アクチュエータ３はボトル状の容器本体（図示せず）の口部に装着される。アクチュエータ３には適宜のポンプ機構が内蔵され、該ポンプ機構を作動させることにより、容器本体内に充填された薬液が吐出口４から吐出される。
【００２３】
上記スプレーノズル１は、適宜の寸法のものとすることができ、図示例では約２．５ｍｍの細径の硬質樹脂ノズルを用いている。
【００２４】
また、チャック部材２は、硬質樹脂材料により成形されており、図４にも示すように、基端側の円錐台形筒状の締付部２ａと、締付部２ａの先端部に連設された円筒状の延長部２ｂとを備えている。また、チャック部材２には、上記ノズル１が挿通されるノズル挿通孔２１が、締付部２ａと延長部２ｂの軸方向全長にわたって設けられている。延長部２ｂは、締付部２ａの基端部よりも小径とされ、これにより締付部２ａの先端に段部２２が形成されている。
【００２５】
締付部２ａの外周面は、基端側に至るに従って徐々に縮径するテーパー状に構成されており、該外周面のテーパー構造は、後述する吐出口４の内面に設けられたテーパー面４３に対応するように傾斜比がほぼ同じとされている。また、締付部２ａには、基端部から先端側へ向けて延びるスリット２３が周方向４カ所に設けられている。この４つのスリット２３により分割された各ブロック２４はその基端が自由端となるため、径方向内方への押し込み力が作用すると基端側が径方向内方に弾性変形し、而して、締付部２ａが縮径する。
【００２６】
延長部２ｂの先端には全周にわたる外向きフランジ２５が設けられている。この外向きフランジ２５の外径は、段部２２の外径よりも小径となされている。
【００２７】
上記吐出口４は、その基端側から、ノズル１とほぼ同径のノズル保持孔４１と、チャック部材２が内嵌されるチャック部材装着孔４２とが連設された構成となされている。なお、ノズル保持孔４１には適宜のポンプ機構によって容器本体内部の薬液が供給され、該保持孔４１に挿通されたノズル１内に薬液を流通させるようになっている。
【００２８】
チャック部材装着孔４２の内周面は、先端側から基端側に至るに従って徐々に縮径するテーパー面４３を有している。該テーパー面４３の先端側は、段部４４を介して大径となされており、該大径部４５の軸方向中途部に、全周にわたるリブ状の内向き凸部４６が突設されている。この内向き凸部４６の基端側（奥側）は略直角に立ち上がる段状に形成されており、先端側（開口側）はテーパー状に形成されている。また、該凸部４６の内径は、チャック部材２の段部２２の外径よりも若干小径となされており、チャック部材２の締付部２ａの先端側を凸部４６よりも奥側に強制的に押し込んで、段部２２を凸部４６の基端側に係止させるようにしている。
【００２９】
上記スプレーノズル１をアクチュエータ３の吐出口２に取付けるには、まず、図１に示すように、ノズル１をチャック部材２の挿通孔２１に先端側から挿通する。次に、該ノズル１の基端部を吐出口２のノズル保持孔２１に所定深さまで挿入する。その後、外向きフランジ２５を指や適宜の工具などにより押圧することにより、チャック部材２を吐出口２の装着孔４２内に押し込んでいくと、チャック部材２の締付部２ａのテーパー状外周面と吐出口４のテーパー状内周面４３との接触により締付部２ａが縮径され（特に挿通孔２１の基端側が縮径される）、該締付部２ａによりノズル１を全周にわたって均一な力で締付保持する。一方、締付部２ａがノズル１を締付保持したとき、図２に示すように、チャック部材２の段部２２が吐出口４の内向き凸部４６に係止されて、チャック部材２が吐出口４内に仮止め固定されるようになっている。
【００３０】
図２に示す状態で使用しても良いが、ノズル１の抜けをより確実に防止するために、段部２２を凸部４６に係止した後、吐出口４の前記凸部４６の先端側をヒートシールすることにより、図３に示すように、前記段部２２により深く係止する内向きフランジ４７を形成するのが好ましい。
【００３１】
この内向きフランジ４７が、チャック部材２の外向きフランジ２５の外周縁に近接するように上記ヒートシールを行うのが好ましい。また、内向きフランジ４７の内径（即ち、吐出口先端開口の内径）が、外向きフランジ２５とほぼ同径となるように上記ヒートシールを行うのが好ましい。
【００３２】
上記実施形態によれば、基端側にテーパー形状を有すると共にそのサイドの複数箇所にスリットを設けたチャック部材にノズルを差し込み、このノズルをアクチュエータの吐出口の所定の位置まで挿入した後、チャック部材をアクチュエータの吐出側先端に挿入することによって、ノズルに対し周方向に均一な力で挟持することができ、さらに、ノズルの変形量を可及的低減しつつも大きな保持力を得ることができる。また、アクチュエータ吐出側先端内面に設けたリブ状凸部４６によりチャック部材２を固定して、抜け落ちない構造とすることができ、さらに必要な場合にはアクチュエータ先端をヒートシールしてチャック部材を抱持することができる。
【００３３】
【発明の効果】
本発明の取付構造によれば、チャック部材は、ノズルが挿通される挿通孔を有し、チャック部材が吐出口内に押し込まれるに従って前記挿通孔が縮径して前記ノズルを締付保持し、該ノズルを保持した状態でチャック部材が吐出口内に固定されているので、ノズルをチャック部材により全周にわたり均一な締付力で保持することができ、ノズルに局所的な締付力を与えることなく十分なノズル保持力が得られ、使用中のノズル抜け落ちを防止することができるとともに、ノズルを押し潰すこともなく、ノズルの詰まりも防止できる。さらに、チャック部材を吐出口に押し込むだけの簡単な作業でノズルの保持を行わせることができ、取付作業性にも優れたものとなる。
【００３４】
さらに、吐出口内周面がテーパー面を有し、チャック部材が締付部と延長部とを備え、ノズル挿通孔は前記締付部と延長部とにわたって設けられており、前記締付部の外周面は、前記テーパー面に対応するテーパー状とされ、該締付部の基端側が縮径変形可能に構成されているので、テーパーのくさび作用により軽い押し込み力でチャック部材の締付部を強く締め付けることができ、構造も簡素で成形性も良くなる。
【００３５】
また、延長部は締付部よりも小径とされ、これにより締付部の先端に段部を形成し、該段部が吐出口先端に形成された内向き凸部に係止され、これによりチャック部材が吐出口内に固定されているので、締付部は吐出口内に収容されるようになり、縮径変形可能とするためのスリット構造その他の構造が外側から隠されるようになって、商品外観性が良好になるとともに、チャック部材の段部と内向き凸部とは、ノズルの保持力に対する反力によって互いに密着され、吐出口先端部における液密性、気密性を容易に確保することができる。
【００３６】
さらに、延長部の先端に外向きフランジが設けられており、該外向きフランジが、吐出口先端に近接されているとともに、外向きフランジの外径が、吐出口先端開口の内径とほぼ同一若しくは該内径よりも大径であるので、外向きフランジにより吐出口先端開口を塞いで埃等が吐出口に付着することを防止できるとともに、チャック部材の吐出口への押し込み作業性も良好なものとなる。
【００３７】
また、本発明の取付方法によれば、ノズルをチャック部材の挿通孔に挿通し、該ノズルの基端部を吐出口に挿入するとともに、前記チャック部材を吐出口内に押し込んで締付部のテーパー状外周面を吐出口のテーパー状内周面との接触により締付部を縮径して前記ノズルを締付保持し、該ノズルを保持した状態でチャック部材の前記段部を吐出口の前記凸部に係止することにより、チャック部材を吐出口内に固定することを特徴とするものであるから、ノズルをチャック部材により全周にわたり均一な力で締付保持させることができ、ノズルを押し潰すことなく十分な保持力を得ることができるとともに、このようにノズルを保持した状態でチャック部材を凸部に係止することで仮止めすることができるため作業性も良好なものとなり、その後、凸部近傍の吐出口先端部を変形させることによりチャック部材を確実に保持することもできる。
【００３８】
さらに、前記段部を吐出口の前記凸部に係止した後、吐出口の前記凸部の先端側をヒートシールすることにより、前記段部により深く係止する内向きフランジを形成することにより、該内向きフランジと前記段部との密着性が良好なものとなり、液密性、気密性が容易に確保され、かつ、チャック部材を吐出口内に確実に固定することができる。
【００３９】
また、チャック部材の延長部の先端に外向きフランジを形成しておき、該外向きフランジを押圧することによりチャック部材を吐出口内に押し込み、ヒートシールにより形成される内向きフランジが前記外向きフランジに近接するとともに、外向きフランジの外径が、内向きフランジの内径とほぼ同径もしくは該内径よりも大径となるようにすることにより、チャック部材の吐出口への押し込み作業性を向上することができるとともに、そのための外向きフランジが取付作業後は吐出口への埃等の付着を防止する蓋部材として機能させることができる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係るスプレーノズルの取付構造の分解断面図である。
【図２】同取付構造のチャック部材を仮止めした状態の断面図である。
【図３】同取付構造のヒートシール後の断面図である。
【図４】チャック部材の拡大図であって、（ａ）は基端側の側面図、（ｂ）は正面図、（ｃ）は先端側の側面図である。
【符号の説明】
１スプレーノズル
２チャック部材
２ａ締付部
２ｂ延長部
２１ノズル挿通孔
２２段部
２３スリット
２５外向きフランジ
３アクチュエータ
４吐出口
４３テーパー面
４６内向き凸部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure and mounting method for a spray nozzle (actuator nozzle) such as a throat spray container.
[0002]
[Prior art]
As a conventional method for fixing the actuator nozzle, a method of heat-sealing one side after inserting the nozzle into the actuator or a method of press-fitting the nozzle into a rib formed on the actuator is general.
[0003]
[Problems to be solved by the invention]
However, by any of the above conventional methods, the holding power of the nozzle is weak, and the nozzle tube may come off during use, and the nozzle tube is deformed by heat sealing, reducing the passage in the tube. Depending on the case, the nozzle may be blocked.
[0004]
In addition, spray nozzles such as throat spray containers are also used for local anesthesia (including epidermal anesthesia) such as tooth extraction, extraction, and calculus removal. However, particularly when spraying, since a large pressure is generated inside the nozzle, the nozzle is likely to drop out.
[0005]
In addition, since the nozzle is conventionally fitted by welding or press fitting, the contents and disinfectant are immersed in the fitting part at the time of multiple use and disinfection after use, and the nozzle is easily removed. Therefore, the nozzle is easily detached due to the nozzle internal pressure or the like.
[0006]
Therefore, the present invention is capable of holding the nozzle strongly without locally compressing it while being excellent in mounting workability, and prevents the nozzle from coming off even after multiple use and disinfection after use. With the goal.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention takes the following technical means.
[0008]
That is, the present invention provides a spray nozzle mounting structure in which a long cylindrical spray nozzle is fixedly attached to a discharge port via a chuck member, and the long cylindrical spray nozzle is interposed via a chuck member. A spray nozzle mounting method for mounting and fixing to a discharge port is provided. The discharge port is provided in a nozzle attached member such as an actuator or a cap to which the nozzle is attached.
[0009]
In the spray nozzle mounting structure according to the present invention, the chuck member has an insertion hole through which the nozzle is inserted, and the insertion hole is reduced in diameter as the chuck member is pushed into the discharge port to tighten the nozzle. The chuck member may be fixed in the discharge port in a state where the nozzle is held. The chuck member may have a cylindrical structure in which a plurality of slits are formed on the side portions, and may be configured to have a C-shaped cross section. Further, the insertion hole only needs to penetrate the chuck member in the axial direction, and may have a concave groove shape opened in the radial direction. Further, the inner diameter of the insertion hole, in particular, the inner diameter of the portion to be clamped and held is preferably formed to be substantially the same as the outer diameter of the nozzle. An appropriate method can be used as the chuck member fixing means, but preferably, the engagement between the locked portion such as a step formed on the inner surface of the discharge port and the locking portion such as a step formed on the outer periphery of the chuck member. Thus, the chuck member can be fixed in the discharge port.
[0010]
According to the above-described spray nozzle mounting structure of the present invention, while having a simple structure and excellent mounting workability, by reducing the diameter of a predetermined portion of the chuck member, the nozzle is substantially uniform over the entire circumference. It can be tightened and held by force, and a sufficient nozzle holding force can be obtained without crushing or closing the nozzle passage, so that the nozzle will not come out during use, and the nozzle passage will be secured. Therefore, the spray from the nozzle is smoothly performed.
[0011]
The discharge port inner peripheral surface may have a tapered surface that gradually decreases in diameter from the distal end side to the proximal end side. According to this, by pressing the chuck member into the discharge port, it is possible to apply a tightening force in the diameter reducing direction by the tapered surface to the chuck member. In addition, a nozzle insertion hole having a diameter substantially the same as the outer diameter of the nozzle is provided on the base end side with respect to the tapered surface, and a discharge fluid (such as a coating chemical) can be supplied to the nozzle insertion hole by an appropriate pump mechanism or the like. .
[0012]
In addition, the chuck member can include a cylindrical fastening portion on the proximal end side and a cylindrical extension portion provided continuously with the distal end portion of the fastening portion. In this case, the nozzle insertion hole can be provided across the tightening portion and the extension portion. Moreover, the outer peripheral surface of the said clamping part can be comprised in the taper shape corresponding to the said taper surface. In addition, in the taper structure of the outer peripheral surface of the tightening part, only the part of the outer peripheral surface of the tightening part in the axial direction (for example, the base end part) in addition to the outer peripheral surface being tapered in the entire axial direction. Including a taper surface.
[0013]
Further, the tightening portion can be configured to be deformable in diameter reduction, and it is particularly preferable to adopt a configuration in which the proximal end side can be deformed in diameter reduction. For example, by providing slits extending from the proximal end portion of the tightening portion toward the distal end side at a plurality of locations in the circumferential direction of the tubular tightening portion, the proximal end side of the tightening portion can be configured to be deformed in a reduced diameter. . In addition, the tightening portion can also be configured to be reduced in diameter by forming the tightening portion with an elastic material.
[0014]
Further, the extension portion has a smaller diameter than the tightening portion, whereby a step portion can be formed at the tip of the tightening portion. Then, the step portion is locked to an inward convex portion formed at the tip of the discharge port, whereby the chuck member can be fixed in the discharge port. The inward convex portion can be constituted by an annular rib extending over the entire circumference of the inner peripheral surface of the discharge port, or can be constituted by a plurality of protrusions provided at intervals in the circumferential direction. The inward convex portion is an undercut on molding when a nozzle attached member (an actuator or the like) having a discharge port is a resin molded product. In addition, it is preferable that there is no undercut portion in the discharge port other than the inward convex portion. Further, the inward convex portion may be an inward flange formed by heat sealing at the tip of the discharge port after the chuck member is mounted.
[0015]
An outward flange can be provided at the tip of the extension. The outward flange is brought close to the discharge port tip, and the outer diameter of the outward flange is substantially the same as or larger than the inner diameter of the discharge port tip opening. The flange opening covers the opening at the tip of the discharge port, and dust and the like are prevented from entering the tip opening. Furthermore, since the area of the tip end surface of the chuck member is increased by providing the outward flange, workability when the chuck member is pushed into the discharge port is improved.
[0016]
In the above spray nozzle mounting method of the present invention, the inner peripheral surface of the discharge port has a tapered surface that gradually decreases in diameter from the distal end side to the proximal end side, and is located radially inward from the distal end side of the tapered surface. The chuck member includes a cylindrical fastening portion on the proximal end side, and a cylindrical extension portion connected to the distal end portion of the fastening portion. An insertion hole through which the nozzle is inserted is provided between the tightening portion and the extension portion, and the outer peripheral surface of the tightening portion is tapered to correspond to the tapered surface, so that the tightening portion can be deformed in a reduced diameter. In addition, the extension portion has a smaller diameter than the tightening portion, whereby a step portion can be formed at the tip of the tightening portion. The disassembled nozzle and chuck member can be attached to the discharge port in the next step. That is, the nozzle is inserted into the insertion hole of the chuck member, the proximal end portion of the nozzle is inserted into the discharge port, and the chuck member is pushed into the discharge port so that the tapered outer peripheral surface of the tightening portion is tapered to the discharge port. The diameter of the tightening portion is reduced by contact with the inner peripheral surface of the shape, the nozzle is tightened and held, and the step portion of the chuck member is locked to the convex portion of the discharge port while the nozzle is held. The chuck member can be fixed in the discharge port.
[0017]
According to the mounting method of the present invention, without using a special tool, machine tool, or the like, when the nozzle is inserted into the chuck member and inserted into the discharge port, and the chuck member is pressed into the discharge port and locked, The tightening part of the member is reduced in diameter, and the nozzle is tightened and held uniformly over the entire circumference, the nozzle can be held with a strong force without crushing, and the nozzle does not fall off during use. The fluid such as the chemical solution from the fluid is smoothly discharged.
[0018]
Furthermore, after the stepped portion is locked to the convex portion of the discharge port, the tip side of the convex portion of the discharge port is heat sealed, thereby forming an inward flange that locks deeper into the stepped portion. The chuck member can be securely fixed in the discharge port, and the contact between the discharge port front end and the stepped portion of the chuck member is improved by heat deformation of the discharge port front end by heat sealing. Thus, the air tightness and liquid tightness of this part are improved.
[0019]
Further, an outward flange is formed at the tip of the extension of the chuck member, the chuck member is pushed into the discharge port by pressing the outward flange, and the inward flange formed by heat sealing is the outward flange. In addition, the outer diameter of the outward flange may be substantially the same as or larger than the inner diameter of the inward flange. According to this, similarly to the above-described mounting structure, dust or the like can be prevented from entering the opening of the discharge port tip by the outward flange, and the workability of pushing the chuck member is improved.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
[0021]
1 to 4 show a spray nozzle mounting structure and mounting method according to an embodiment of the present invention. The mounting structure and mounting method are for the throat for applying a chemical solution such as an iodine solution to the throat region. It can be suitably used for spray containers and the like.
[0022]
The spray nozzle mounting structure of the present embodiment is formed by mounting and fixing a long cylindrical spray nozzle 1 to a discharge port 4 of an actuator 3 via a chuck member 2. The actuator 3 is attached to the mouth of a bottle-shaped container body (not shown). An appropriate pump mechanism is built in the actuator 3, and the chemical liquid filled in the container body is discharged from the discharge port 4 by operating the pump mechanism.
[0023]
The spray nozzle 1 can have an appropriate size, and in the illustrated example, a hard resin nozzle having a small diameter of about 2.5 mm is used.
[0024]
Further, the chuck member 2 is formed of a hard resin material, and as shown in FIG. 4, the chuck member 2 is connected to the truncated cone-shaped cylindrical tightening portion 2a and the distal end portion of the tightening portion 2a. And a cylindrical extension 2b. The chuck member 2 is provided with a nozzle insertion hole 21 through which the nozzle 1 is inserted over the entire length in the axial direction of the tightening portion 2a and the extension portion 2b. The extension portion 2b has a smaller diameter than the proximal end portion of the tightening portion 2a, whereby a step portion 22 is formed at the tip of the tightening portion 2a.
[0025]
The outer peripheral surface of the tightening portion 2a is formed in a tapered shape that gradually decreases in diameter toward the proximal end side, and the tapered structure of the outer peripheral surface is a tapered surface 43 provided on the inner surface of the discharge port 4 described later. The slope ratio is substantially the same so as to correspond to The tightening portion 2a is provided with four slits 23 in the circumferential direction extending from the proximal end portion toward the distal end side. Since the base end of each block 24 divided by the four slits 23 is a free end, the base end side is elastically deformed radially inward when a radially inward pushing force is applied. The tightening portion 2a is reduced in diameter.
[0026]
An outward flange 25 is provided over the entire circumference at the tip of the extension 2b. The outer diameter of the outward flange 25 is smaller than the outer diameter of the step portion 22.
[0027]
The discharge port 4 has a configuration in which a nozzle holding hole 41 having substantially the same diameter as the nozzle 1 and a chuck member mounting hole 42 into which the chuck member 2 is fitted are connected from the base end side. The nozzle holding hole 41 is supplied with a chemical solution inside the container body by an appropriate pump mechanism, and the chemical solution is circulated in the nozzle 1 inserted through the holding hole 41.
[0028]
The inner peripheral surface of the chuck member mounting hole 42 has a tapered surface 43 that gradually decreases in diameter from the distal end side to the proximal end side. The tip end side of the tapered surface 43 has a large diameter via a stepped portion 44, and a rib-like inward convex portion 46 is provided in the middle of the axial direction of the large diameter portion 45 so as to project. Yes. The base end side (back side) of the inward convex portion 46 is formed in a step shape rising substantially at a right angle, and the tip end side (opening side) is formed in a taper shape. Further, the inner diameter of the convex portion 46 is slightly smaller than the outer diameter of the step portion 22 of the chuck member 2, and the front end side of the tightening portion 2 a of the chuck member 2 is forced to the rear side of the convex portion 46. The stepped portion 22 is locked to the proximal end side of the convex portion 46 by pushing in.
[0029]
In order to attach the spray nozzle 1 to the discharge port 2 of the actuator 3, first, the nozzle 1 is inserted into the insertion hole 21 of the chuck member 2 from the front end side as shown in FIG. Next, the base end portion of the nozzle 1 is inserted into the nozzle holding hole 21 of the discharge port 2 to a predetermined depth. Thereafter, when the chuck member 2 is pushed into the mounting hole 42 of the discharge port 2 by pressing the outward flange 25 with a finger or an appropriate tool, the tapered outer peripheral surface of the tightening portion 2a of the chuck member 2 is pressed. And the tapered inner peripheral surface 43 of the discharge port 4 reduce the diameter of the tightening portion 2a (particularly, the diameter of the proximal end of the insertion hole 21 is reduced), and the tightening portion 2a causes the nozzle 1 to extend over the entire circumference. Tighten and hold with uniform force. On the other hand, when the tightening portion 2a holds the nozzle 1 in a tightened manner, the step portion 22 of the chuck member 2 is locked to the inward convex portion 46 of the discharge port 4 as shown in FIG. The discharge port 4 is fixed temporarily.
[0030]
Although it may be used in the state shown in FIG. 2, in order to prevent the nozzle 1 from coming off more reliably, after the stepped portion 22 is locked to the convex portion 46, the tip side of the convex portion 46 of the discharge port 4 As shown in FIG. 3, it is preferable to form an inward flange 47 that engages deeper with the step portion 22 by heat sealing.
[0031]
The heat sealing is preferably performed such that the inward flange 47 is close to the outer peripheral edge of the outward flange 25 of the chuck member 2. Further, the heat sealing is preferably performed so that the inner diameter of the inward flange 47 (that is, the inner diameter of the discharge port front end opening) is substantially the same as that of the outward flange 25.
[0032]
According to the above embodiment, the nozzle is inserted into a chuck member having a tapered shape on the base end side and provided with slits at a plurality of locations on the side thereof, and after inserting the nozzle to a predetermined position of the discharge port of the actuator, the chuck By inserting the member at the discharge end of the actuator, the nozzle can be clamped with a uniform force in the circumferential direction, and a large holding force can be obtained while reducing the deformation amount of the nozzle as much as possible. it can. Further, the chuck member 2 can be fixed by a rib-like convex portion 46 provided on the inner surface of the actuator discharge side tip so that it does not fall out. Further, if necessary, the tip of the actuator is heat sealed to hold the chuck member. Can have.
[0033]
【The invention's effect】
According to the mounting structure of the present invention, the chuck member has an insertion hole through which the nozzle is inserted, the diameter of the insertion hole decreases as the chuck member is pushed into the discharge port, and the nozzle is tightened and held. Since the chuck member is fixed in the discharge port with the nozzle held, the nozzle can be held by the chuck member with a uniform tightening force over the entire circumference without giving a local tightening force to the nozzle. Sufficient nozzle holding force can be obtained, nozzle drop-out during use can be prevented, nozzle clogging can be prevented, and nozzle clogging can be prevented. Further, the nozzle can be held by a simple operation of simply pushing the chuck member into the discharge port, and the mounting workability is excellent.
[0034]
Further, the inner peripheral surface of the discharge port has a tapered surface, the chuck member includes a tightening portion and an extension portion, and the nozzle insertion hole is provided over the tightening portion and the extension portion, and the outer periphery of the tightening portion The surface has a tapered shape corresponding to the tapered surface, and the proximal end side of the tightening portion is configured to be deformable in a reduced diameter. Therefore, the tightening portion of the chuck member is strongly strengthened by a light pushing force by the wedge action of the taper. It can be tightened, and the structure is simple and the moldability is improved.
[0035]
Further, the extension portion has a smaller diameter than the tightening portion, thereby forming a step portion at the tip of the tightening portion, and the step portion is locked to the inward convex portion formed at the tip of the discharge port. Since the chuck member is fixed in the discharge port, the tightening part is accommodated in the discharge port, and the slit structure and other structures for enabling the diameter reduction deformation are hidden from the outside. Appearance is improved, and the stepped portion and the inwardly convex portion of the chuck member are brought into close contact with each other by the reaction force against the holding force of the nozzle, so that liquid-tightness and airtightness at the tip of the discharge port can be easily secured. Can do.
[0036]
Furthermore, an outward flange is provided at the distal end of the extension, the outward flange is close to the discharge port distal end, and the outer diameter of the outward flange is substantially the same as the inner diameter of the discharge port distal end opening or Since the diameter is larger than the inner diameter, it is possible to prevent dust and the like from adhering to the discharge port by closing the discharge port end opening with the outward flange, and the workability of pushing the chuck member into the discharge port is also good. Become.
[0037]
According to the mounting method of the present invention, the nozzle is inserted into the insertion hole of the chuck member, the proximal end portion of the nozzle is inserted into the discharge port, and the chuck member is pushed into the discharge port to taper the tightening portion. The tightening portion is reduced in diameter by contacting the outer peripheral surface with the tapered inner peripheral surface of the discharge port to tighten and hold the nozzle, and the stepped portion of the chuck member is held in the discharge port while the nozzle is held. Since the chuck member is fixed in the discharge port by engaging with the convex portion, the nozzle can be clamped and held by the chuck member with uniform force over the entire circumference, and the nozzle is pushed. Sufficient holding force can be obtained without crushing, and workability is also improved because the chuck member can be temporarily fixed by engaging the convex portion with the nozzle held in this way. The chuck member can be reliably held by deforming the discharge port distal portion near the convex portion.
[0038]
Furthermore, after the stepped portion is locked to the convex portion of the discharge port, the tip side of the convex portion of the discharge port is heat sealed, thereby forming an inward flange that locks deeper into the stepped portion. Adhesiveness between the inward flange and the stepped portion is improved, liquid tightness and air tightness are easily secured, and the chuck member can be securely fixed in the discharge port.
[0039]
Further, an outward flange is formed at the tip of the extension portion of the chuck member, the chuck member is pushed into the discharge port by pressing the outward flange, and the inward flange formed by heat sealing is the outward flange. In addition, the outer diameter of the outward flange is substantially the same as or larger than the inner diameter of the inward flange, thereby improving the workability of pushing the chuck member into the discharge port. In addition, the outward flange for this purpose can function as a lid member for preventing dust and the like from adhering to the discharge port after the mounting operation.
[Brief description of the drawings]
FIG. 1 is an exploded cross-sectional view of a spray nozzle mounting structure according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a state in which a chuck member having the same mounting structure is temporarily fixed.
FIG. 3 is a cross-sectional view after heat sealing of the mounting structure.
FIGS. 4A and 4B are enlarged views of the chuck member, in which FIG. 4A is a side view on the base end side, FIG. 4B is a front view, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spray nozzle 2 Chuck member 2a Fastening part 2b Extension part 21 Nozzle insertion hole 22 Step part 23 Slit 25 Outward flange 3 Actuator 4 Discharge port 43 Tapered surface 46 Inward convex part

Claims

A spray nozzle mounting structure in which a long cylindrical spray nozzle (1) is mounted and fixed to a discharge port (4) through a chuck member (2), and the chuck member (2) includes the nozzle ( 1) has an insertion hole (21) through which the chuck member (2) is pushed into the discharge port (4), and the insertion hole (21) is reduced in diameter to tighten the nozzle (1). The chuck member (2) is fixed in the discharge port (4) with the nozzle (1) held ,
The inner peripheral surface of the discharge port (4) has a tapered surface (43) that gradually decreases in diameter from the distal end side to the proximal end side, and the chuck member (2) has a cylindrical fastening portion on the proximal end side. (2a) and a cylindrical extension (2b) connected to the tip of the tightening portion (2a), and the nozzle insertion hole (21) has the tightening portion (2a) and the extension ( 2b), and the outer peripheral surface of the tightening portion (2a) has a tapered shape corresponding to the tapered surface (43), and the proximal end side of the tightening portion (2a) can be deformed in a reduced diameter. Is composed of
The extension part (2b) has a smaller diameter than the tightening part (2a), whereby a step part (22) is formed at the tip of the tightening part (2a), and the step part (22) serves as a discharge port ( 4) A spray nozzle mounting structure characterized in that the chuck member (2) is fixed in the discharge port (4) by being locked to the inward convex portions (46, 47) formed at the tip. .

An outward flange (25) is provided at the distal end of the extension (2b), and the outward flange (25) is close to the distal end of the discharge port (4) and outside the outward flange (25). 2. The spray nozzle mounting structure according to claim 1, wherein the diameter is substantially the same as the inner diameter of the discharge port (4) tip opening.

A spray nozzle mounting structure in which a long cylindrical spray nozzle (1) is mounted and fixed to a discharge port (4) through a chuck member (2), and the chuck member (2) includes the nozzle ( 1) has an insertion hole (21) through which the chuck member (2) is pushed into the discharge port (4), and the insertion hole (21) is reduced in diameter to tighten the nozzle (1). The chuck member (2) is fixed in the discharge port (4) with the nozzle (1) held,
The inner peripheral surface of the discharge port (4) has a tapered surface (43) that gradually decreases in diameter from the distal end side to the proximal end side, and the chuck member (2) has a cylindrical fastening portion on the proximal end side. (2a) and a cylindrical extension (2b) connected to the tip of the tightening portion (2a), and the nozzle insertion hole (21) has the tightening portion (2a) and the extension ( 2b), and the outer peripheral surface of the tightening portion (2a) has a tapered shape corresponding to the tapered surface (43), and the proximal end side of the tightening portion (2a) can be deformed in a reduced diameter. Is composed of
An outward flange (25) is provided at the distal end of the extension (2b), and the outward flange (25) is close to the distal end of the discharge port (4) and outside the outward flange (25). A spray nozzle mounting structure characterized in that the diameter is substantially the same as the inner diameter of the discharge port (4) tip opening .

A spray nozzle mounting method for mounting and fixing a long cylindrical spray nozzle (1) to a discharge port (4) via a chuck member (2),
On the inner peripheral surface of the discharge port (4), there is a tapered surface (43) that gradually decreases in diameter from the distal end side to the proximal end side, and is positioned radially inwardly on the distal end side relative to the tapered surface (43). And a convex portion (46) protruding into
The chuck member (2) includes a proximal cylindrical tightening portion (2a) and a cylindrical extension (2b) connected to the distal end of the tightening portion (2a). An insertion hole (21) through which the nozzle (1) is inserted is provided across the tightening portion (2a) and the extension portion (2b), and the outer peripheral surface of the tightening portion (2a) is formed as the tapered surface (43). And the tightening portion (2a) is configured to be deformable in a reduced diameter, and the extension portion (2b) has a smaller diameter than the tightening portion (2a). A step (22) is formed at the tip of 2a),
The nozzle (1) is inserted into the insertion hole (21) of the chuck member (2), the base end of the nozzle (1) is inserted into the discharge port (4), and the chuck member (2) is inserted into the discharge port. (4) The nozzle is pressed into the nozzle by reducing the diameter of the tightening portion (2a) by contacting the tapered outer peripheral surface of the tightening portion (2a) with the tapered inner peripheral surface (43) of the discharge port (4). (1) is clamped and held, and the step (22) of the chuck member (4) is locked to the convex portion (46) of the discharge port (4) while holding the nozzle (1). A method of attaching a spray nozzle, wherein the chuck member (2) is fixed in the discharge port (4).

After the stepped portion (22) is locked to the convex portion (46) of the discharge port (4), the stepped portion is heat sealed at the tip side of the convex portion (46) of the discharge port (4). 5. A spray nozzle mounting method according to claim 4 , characterized in that an inward flange (47) is formed which locks more deeply (22).

An outward flange (25) is formed at the tip of the extension (2b) of the chuck member (2), and the chuck member (2) is moved into the discharge port (4) by pressing the outward flange (25). The inward flange (47) formed by heat sealing is close to the outward flange (25), and the outer diameter of the outward flange (25) is substantially the same as the inner diameter of the inward flange. The spray nozzle mounting method according to claim 5 , wherein the spray nozzle is attached.