JP2004321248A

JP2004321248A - Vacuum regulator

Info

Publication number: JP2004321248A
Application number: JP2003116247A
Authority: JP
Inventors: Masaya Kimura; 真哉木村; Koichiro Miyano; 耕一郎宮野
Original assignee: Asahi Organic Chemicals Industry Co Ltd
Current assignee: Asahi Yukizai Corp
Priority date: 2003-04-21
Filing date: 2003-04-21
Publication date: 2004-11-18
Anticipated expiration: 2023-04-21
Also published as: JP4258757B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum regulator that can appropriately suppress a vacuum pressure generated from a vacuum line, can constantly adjust an arbitrary vacuum pressure, and can be dismantled, cleaned, and assembled easily. <P>SOLUTION: In the main body 1 of this vacuum regulator, a first valve chamber 7 having an annular recessed section 8 in its upper part is formed and an annular supporter 9 is protruded from the center of the recessed section 8. The supporter 9 is provided with a guide groove 11 in which the stopper section 25 of an adjusting screw 2 is slidingly fitted. In addition, an annular fitting section 12 is provided in the lower part of the main body 1 and a circular hole section 13 which accepts the fitted projection 40 of a fixer 5 is provided at the inner peripheral lower end section of the fitting section 12 and a notched section 14 having a diameter which is almost equal to that of the circular-arcuate projecting section 41 of the fixer 5 is provided by expanding the section 14 in the radial direction of the hole section 13. A groove 15 for engagement with the main body 1 is provided over the whole circumference of the inner peripheral lower end section of the fitting section 12 and an annular recessed section 16 and a tapered section 17 which is reduced in diameter toward the annular recessed section 8 from the recessed section 16 are integrally provided on the ceiling surface of the groove 15 for engagement. In addition, a fitting projection 18 on which a pressure adjustment handle 3 is fitted is integrally provided at the upper end section of the main body 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、医療、搬送等の種々の分野で用いられる吸引器、真空搬送機等の真空機器内に設けられ、該機器に作用する真空圧を調整する真空レギュレータに関するものであり、さらに詳しくは、主として医療用の吸引器で好適に用いられ、適度な真空圧に抑えることができ、また任意の真空圧を一定に調整でき、部品点数が極めて少なく、分解、洗浄及び組み立てを容易に行うことができる真空レギュレータに関するものである。
【０００２】
【従来の技術】
従来の真空レギュレータにおいて、図７に示すようなものがあった（例えば、特許文献１。）。図において真空レギュレータである調整器は、一次側に真空ポンプ（図示せず）等の真空発生手段を接続すると共に、二次側に真空機器の動作部（図示せず）を接続し、前記動作部に作用する真空圧を調整する所謂真空調整器として構成されている。調整器の本体であるケーシング１０１には弁１０２を構成するポート１１３及び弁座１１４が形成されている。ポート１１３と連通する出口流路１０３は図示しない真空ポンプと接続され、ケーシング１０１のポート１１３と連通する室１０４にはダイヤフラム１０５が配置され、このダイヤフラム１０５によって密閉された二次室１１７と調整室１１８とに分割されている。二次室１１７は接続されている入口流路１０６を介して前記真空機器の動作部が接続されている。ダイヤフラム１０５は押さえ部材１０７によってケーシング１０１に押圧固定されて二次室１１７の気密を保持し得るように構成されている。またダイヤフラム１０５の中心を貫通して弁体１１５が設けられ、弁体１１５はダイヤフラム１０５と押さえ部材１０７との間に配設されたバネ１０８によって弁座１１４側に付勢されており、ねじ部材１１０の底部１２０と当接する段部１１６が形成されている。内部にバネ１１１を配するねじ部材１１０はケーシング１０１内周に螺着されているブッシング１０９の内周に螺合され、端部には調整ハンドル１１２が固定されている。
また、その作用は、まず前記真空ポンプから入口流路１０６を通じて、二次室１１７へ真空圧が作用し、調整ハンドル１１２を回転させることにより、回転に伴なってねじ部材１１０が回転してダイヤフラム１０５から離隔する方向に移動する。ねじ部材１１０の移動はバネ１１１を介して弁体１１５に伝達され、この弁体１１５が弁座１１４から離隔して弁１０２を所定の開度で開放する。これにより二次室１１７には弁１０２の開度に応じた真空圧が作用し、入口流路１０６を介して前記真空機器の動作部に作用するものであった。
【０００３】
【特許文献１】
特開平５−１９８６７号公報（第３−４頁、図１）
【０００４】
【発明が解決しようとする課題】
しかしながら、前記従来の真空レギュレータでは、前述したように部品点数が非常に多く構造が極めて複雑であった。そのため、特に分解後の殺菌・消毒が必要とされる医療用吸引器の真空圧調整として使用される場合には、分解、洗浄及び組み立てが非常に困難であるという問題が発生していた。
【０００５】
本発明は、以上のような従来技術の問題点に鑑みなされたものであり、真空ラインから発生する真空圧を適度な真空圧に抑えることができ、また任意の真空圧を一定に調整できるもので、さらには部品点数が極めて少なく、分解、洗浄及び組み立てを容易に行うことができる真空レギュレータを提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明の構成を、図１、図２を参照しつつ説明すると、環状凹部８を上部に有する第一弁室７を内部に有し、下端部に嵌合部１２を有し、また第一弁室７に連通する入口流路２１と、後記調圧ねじ２の連通口２３を経由して第一弁室７に連通し、真空ラインに接続される出口流路２０を有する本体１と、本体１の中央部に挿入され、内部に本体１の出口流路２０と第一弁室７に連通する連通口２３と下部外周に設けられたストッパー部２５を有し、第一弁室７の環状凹部８を形成している環状の支持体９に密封状態で回動不能に支承され、本体１の上部に突出している雄ねじ部２２を有する調圧ねじ２と、調圧ねじ２の雄ねじ部２２に螺着され、本体１上端部に回動可能な状態で嵌着されている調圧ハンドル３と、中央に前記調圧ねじ２の連通口２３と協働して流路制御部３６を形成する弁体３７と、周縁部に環状係止部３９を有し、膜部３４が中央部３５より肉薄に形成されるダイヤフラム４と、本体１の嵌合部１２に嵌合され、ダイヤフラム４の環状係止部３９を本体１と挟持固定している外気連通路４３を有する固定体５と、本体１の環状凹部８に嵌挿され、環状凹部８の天井面１０とダイヤフラム４上面とで挟持されたバネ弾性体６とを具備したことを第１の特徴とする。
【０００７】
また、本体１の上端部に一体的に突出して設けられ、外周径方向に突設された環状係止部１９を有し複数の切り込みを有する嵌着突部１８と、調圧ハンドル３が、着脱可能に嵌着されていることを第２の特徴とする。
【０００８】
また、出口流路２０と常に連通する環状溝２４が調圧ねじ２の外周に設けられていることを第３の特徴とする。
【０００９】
さらに、ダイヤフラム４がポリテトラフルオロエチレン（以下、ＰＴＦＥと称する）からなることを第４の特徴とする。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態を図面に示す実施例に基づいて説明するが、本発明が本実施例に限定されないことは言うまでもない。図１は本発明に係る真空レギュレータの開状態を示す縦断面図である。図２は図１の分解斜視図である。図３は図１の本体の斜視図である。図４は図１の閉止状態を示す縦断面図、図５は図１の第一弁室に真空圧が生じたときの縦断面図である。図６は本実施例の使用状態を示す概略図である。
【００１１】
図１乃至図３において、１はポリビニリデンフルオライド（以下ＰＶＤＦと称する）製の本体であり、内部には上部に環状凹部８を有する第一弁室７が形成され、環状凹部８の中央から突出して環状の支持体９が設けられており、支持体９の端部には後記調圧ねじ２のストッパー部２５がスライド嵌合するガイド溝１１が設けられている。本体１の下部には環状の嵌合部１２が設けられており、嵌合部１２の内周下端部には後記固定体５の嵌合突起４０を受容する円孔部１３が設けられている。円孔部１３の径方向には後記固定体５の円弧状突起部４１と略同径の切り欠き部１４が拡張して設けられ、さらに切り欠き部１４の上部には挿入された後記固定体５の円弧状突起部４１が周方向に回動し本体と係合するために全周に亙って設けられた係合用溝１５と、また係合用溝１５の天井面に設けられた円環状凹部１６と、円環状凹部１６から環状凹部８に向かって縮径するテーパ部１７とが一体的に設けられている。一方、本体１の上端部には後記調圧ハンドル３が嵌着される嵌着突部１８が一体的に突出して設けられ、嵌着突部１８の上部には外周径方向に突設された環状係止部１９を有し、嵌着突部１８には全体に亙り縦方向の複数の切り込みを有している。また、本体１の側面には第一弁室７に連通する入口流路２１と、第一弁室７に後記調圧ねじ２の連通口２３を経由して連通する出口流路２０が設けられている。なお、本実施例では出口流路２０と入口流路２１が同一方向に設けられているが、各々同一円周側面上であればどの方向に設けてもよい。
【００１２】
本実施例の嵌着突部１８は複数の切り込みを有した構造になっているが、これは嵌着突部１８と後記調圧ハンドル３を着脱する際に嵌着突部１８を内周径方向に縮めることで容易に着脱を行うことができ、通常の使用においては本体１から外れることがなく、上下の移動なしにスムーズな回動が行える構造である。なお、本実施例の嵌着突部１８は複数の切り込みを有した構造になっているが、後記調圧ハンドル３に着脱可能で且つ上下の移動なくスムーズに回動できる嵌合構造を有するものであれば特に限定されない。
【００１３】
２は本体１の中央部に挿入されている略円柱状のＰＶＤＦ製の調圧ねじであり、調圧ねじ２の上端部には本体１の上部より突出する雄ねじ部２２を有し、中央部外周面には出口流路２０と常に連通する環状溝２４を有し、調圧ねじ２の下端部から環状溝２４に連通する連通口２３を有している。本体１の入口流路２１から第一弁室７と連通口２３と環状溝２４を経由して出口流路２０まで連通されている。調圧ねじ２の下部外周には径方向に突出して設けられたストッパー部２５が対向した位置に一対設けられ、本体１のガイド溝１１にスライド嵌合している。また雄ねじ部２２と環状溝２４の間の位置の外周面、及び環状溝２４とストッパー部２５の間の位置の外周面には環状溝が設けられてＯリング２６、２７がそれぞれ嵌着されていて、調圧ねじ２は本体１の支持体９に密封状態で回動不能に支承されている。
【００１４】
３は調圧ねじ２の雄ねじ部２２に螺着され、本体１の上端部の嵌着突部１８に回動可能な状態で嵌着されているＰＶＤＦ製の調圧ハンドルである。調圧ハンドル３の上部には円筒状の把持部２８が設けられ、内部には下方向に開放された有底円筒状の凹部２９が設けられている。凹部２９の上部内周面には雌ねじ部３０が設けられ、下部内周面には嵌着部３１が設けられている。嵌着部３１は本体１の嵌着突部１８を内周径方向に縮ませるためのテーパ部３２と、テーパ部３２の上部に本体１の環状係止部１９が係合するための係合用溝３３を有している。なお、把持部２８の形状は六角柱、八角柱でもよく、形状は特に限定されない。また、本実施例では嵌着部３１は本体１の嵌着突部１８に嵌着させるためにテーパ部３２と、係合用溝３３を有した構造になっているが、調圧ハンドル３が本体１に着脱可能で且つ上下の移動なくスムーズに回動できる嵌合構造を有するものであれば特に限定されない。さらに、調圧ハンドル３及び本体１の周側面に開度調節用の目盛を設けてもよい。
【００１５】
４はＰＴＦＥ製のダイヤフラムであり、膜部３４は中央部３５より肉薄に形成されている。中央部３５の上面は平面状に形成され、後記バネ弾性体６を保持するバネ受け部３８になっていて、さらにその中心には、前記調圧ねじ２の連通口２３と協働して流路制御部３６を形成する弁体３７が設けられている。また膜部３４の外周には断面矩形状の環状係止部３９が設けられ、本体１の円環状凹部１６に嵌合された状態で本体１と後記固定体５とで挟持固定されている。
【００１６】
５は本体１の嵌合部１２に嵌合されているＰＶＤＦ製の固定体である。固定体５の上部には環状の嵌合突部４０が設けられている。嵌合突部４０には、上端部周側面に本体１の切り欠き部１４から挿入され周方向に回動されて本体１と係合するための径方向に突出した円弧状突起部４１と、上端面に内周にダイヤフラム４の環状係止部３９を挟持するための円弧状凹部４２が一体的に設けられていて、本体１とバイヨネット方式で係合固定されている。また固定体５の下端部中央には外気連通路４３が設けられ、固定体５内部には、外気連通路４３により外気と連通され、ダイヤフラム４と共に形成される第二弁室４４が設けられている。第二弁室４４はダイヤフラム４によって本体１の第一弁室７とは密閉状態で隔離されている。
【００１７】
６はフッ素樹脂が被覆されてあるバネ弾性体である。本体１の環状凹部８に嵌挿され第一弁室７の天井面１０とダイヤフラム４のバネ受け部３８とで挟持されている。バネ弾性体６のフッ素樹脂被覆は必ずしも必要としないが、フッ素被覆することにより耐薬品性に優れた効果と錆防止効果を有する。なお、本実施例では弾性体としてバネを用いているが、ベローズ、ゴム等の弾性力を有するものを用いても良く、特に限定されない。
【００１８】
本発明において、ダイヤフラム４、バネ弾性体６を除く本体１等の各部材の材質はＰＶＤＦを用いているが、ポリ塩化ビニル、ポリプロピレン、他のフッ素樹脂やその他のプラスチック或いは金属でもよく特に限定されない。またダイヤフラム４の材質はＰＴＦＥ等のフッ素樹脂が好適に使用されるが、耐薬品性の要求がそれほど厳しくない場合はゴムや金属等を使用しても良い。
【００１９】
以上説明したように、本発明は前記従来技術に比較して部品点数が極めて少ない構成になっている。
【００２０】
次に本実施例の真空レギュレータの作用を図１及び図４乃至図６に基づいて説明する。
【００２１】
図４において、流路制御部３６が閉止状態の本実施例の真空レギュレータの出口流路２０には真空ポンプ等の真空ライン（図示せず）が接続され、入口流路２１に閉止状態の流路の開閉手段（図示せず）を接続する。出口流路２０内は真空ラインによって減圧された状態でまず調圧ハンドル３を流路制御部３６が開放する方向に回動させると、調圧ハンドル３の回動に伴なって調圧ねじ２が上昇し、同時に連通口２３がダイヤフラム４の弁体３７から離間し、流路制御部３６が開状態になる。これにより、出口流路２０と第一弁室７が連通し、第一弁室７内は減圧される。このとき、ダイヤフラム４によって密封状態で第一弁室７と隔離され且つ外気連通路４３を介して大気と連通している第二弁室４４内の圧力は減圧された第一弁室７内の圧力より高くなるため、初期偏平状態のダイヤフラム４には上方向の力が加わる。第二弁室４４と第一弁室７の圧力差が大きくなるにつれてその上方向の力がバネ弾性体６の弾性力より大きくなり始め、ダイヤフラム４は山形状に変形し、弁体３７は連通口２３に近づいて行き、ついには圧接され、流路制御部３６は閉止状態になる（図５の状態）。
【００２２】
図５の状態から閉止状態の入り口流路２１に接続されている流路の開閉手段を開放させると、第一弁室７内の圧力は、前記状態より高くなり第二弁室４４内との圧力の差が小さくなる。そのため、ダイヤフラム４の上向きの力は弱まり、バネ弾性体６の弾性力によりダイヤフラム４は偏平状態になり元の位置に戻る。このとき、ダイヤフラム４の弁体３７は連通口２３から離間し、流路制御部３６には一定の開度が確保され、入口流路２１から一定の真空圧で吸引することができる（図１の状態）。このため、真空ラインから発生する真空圧は、真空レギュレーターを介することによって真空圧を適度に抑えられた状態で、一定の真空圧で制御することができる。
【００２３】
真空圧を目的値に調整する場合は、調圧ハンドル３を回動させ、回転に伴なって調圧ねじ２が上下移動し、流路制御部３６の開度を調整する。これにより入口流路２１から吸引するための真空圧は、真空ラインの能力及び調整された流路制御部３６の開度に応じてコントロールされる。また、流路内に圧力計を設置していれば、正確な真空圧にコントロールすることができる。
【００２４】
次に、本実施例の真空レギュレータの実施例について、医療器具、特に患者の喉や気管に付着した汚物等を吸引処理する吸引器等の真空調整用として使用される場合を図６に基づいて説明する。まず真空レギュレータの出口流路２０にチューブ５１を介して真空ポンプ４５を接続する。次に入口流路２１にチューブ５２を介して三方弁４７の第一流出口４９を接続し、三方弁４７の第二流出口５０はチューブ５４を介してチューブ５１に連通するように接続し、三方弁４７の流入口４８にチューブ５３を介して真空機器動作部４６を接続する。この時、三方弁４７は流入口４８と第一流出口４９とが連通するように切り替えられている。真空機器動作部４６内は、三方弁４７からのチューブ５３がトラップ５７に接続されていて、トラップ５７からチューブ５５が延設されていて、吸引口５６から患者に付着した汚物等を吸引する構成になっている。真空ポンプ４５は真空レギュレータを経由して作用するため、吸引口５６から吸引される能力は真空レギュレータによって調整することが可能である。このため患者の状態等に応じて真空レギュレータで調整された真空圧で患者に使用することができ、さらに万が一、吸引口５６が患者の皮膚等に直接当たり過剰な真空圧が作用した場合でも、前記構造を有しているので、バネ弾性体６の弾性力に対してダイヤフラム４への上向きの力が大きくなり、流路制御部３６が閉止され過剰な真空圧を防ぎ、過剰な吸引が作用することなく患者を傷つけることがない。すなわち安全に汚物等を吸引できる。吸引された汚物等はトラップ５７に溜まる。エアはチューブ５３から真空ポンプ４５へ吸引される。トラップ５７内には溜まった汚物がチューブ５３から真空レギュレータ内に入り込まないようにフロートなどを設けても良い。なお、真空レギュレータと三方弁４７との距離は特に限定されないが、吸引の調整や切り替えを容易に行えることを考慮すると互いに近い場所に設置する方が好ましい。
【００２５】
また三方弁４７は、流入口４８と第一流出口４９への連通と、流入口４８と第二流出口５０への連通と、流路の閉止の３段階のうち、いずれかに切り替える機能を有しており、使用状況に合わせて、真空レギュレータによって調整された真空圧を用いた吸引と、真空ポンプ４５からの直接の高真空圧による吸引と、吸引停止の３段階を選択することができる。なお、三方弁４７は、各々２つの流出口への連通と閉止の切り替えが可能であれば構造は特に限定されない。
【００２６】
さらに三方弁４７を第二流出口５０に合わせた場合、真空ポンプ４５は真空レギュレータを経由せずに作用するため、真空ポンプ４５から作用する高真空圧によって吸引することができ、強い吸引力が得られる。三方弁４７を閉止に合わせた場合、吸引口５６から真空ポンプ４５への流路を三方弁４７のところで遮断できるため、真空ポンプ４５を停止することなしに吸引を止めることができる。このため吸引の一旦停止や緊急遮断が可能である。
【００２７】
次に、本実施例の真空レギュレータの組み立て方法について図１乃至図３に基づいて説明する。
まず、調圧ハンドル３の嵌着部３１を本体１の上端部の嵌着突部１８に嵌着する。次にＯリング２６とＯリング２７が嵌着された調圧ねじ２を本体１の下部から嵌挿し、調圧ハンドル３に螺合させる。さらに調圧ねじ２をストッパー部２５がガイド溝１１の上端面に接触するまで調圧ハンドル３を回転させ調圧ねじ２を引き上げ、本体１の支持体９に支承させる。次にバネ弾性体６を本体１の環状凹部８に嵌挿し、ダイヤフラム４の環状係止部３９を本体１の円環状凹部１６に嵌着させて本体１に固定する。次に固定体５の円弧状突起部４１を本体１の切り欠き部１４を通して係合用溝１５の位置まで押え込んだ後、固定体５を周方向に９０度回動することにより固定体５の円弧状突起部４１を本体１の係合用溝１５に係合させる所謂バイヨネット方式により固定体５を本体１に係合固定する。このときダイヤフラム４の環状係止部３９は固定体５の円弧状凹部４２に嵌合され、バネ弾性体６は本体１の第一弁室７の天井面１０とダイヤフラム４のバネ受け部３８とで挟持されている。なお、本体１と固定体５との固定方法は、本実施例ではバイヨネット方式によって係合固定しているが、本体１下部及び固定体５上部にねじ部等を設けることによる螺着固定またはその他の方法を用いても良く、特に限定されない。
【００２８】
また、環状溝２４は、調圧ねじ２が上下に移動しても出口流路２０に常に連通する幅を有し調圧ねじ２の外周全体に亙り設けられていて、出口流路２０に対する調圧ねじ２の周方向の位置には関係なく常に連通口２３と出口流路２０を連通することができるため、組み立ての際に調圧ねじ２の周方向の位置を気にすることなく組み立てることができ、容易にかつ短時間に組み立てを行うことができる。さらに、調圧ねじが上下に移動しても連通口２３と出口流路２０との連続した流路は絞られることはない。なお、本実施例では環状溝２４は調圧ねじ２の外周全体に亙る溝になっているが、出口流路２０と常に連通するならば部分的に設けていればよく、特に限定されない。
【００２９】
以上のように本実施例の真空レギュレータは組み立てが極めて容易であり、組み立てに要する工具も一切不要である。また、分解方法については上記組み立てとは逆の手順で行えば良く、分解も容易であり、組み立て時と同様に工具も一切不要である。
【００３０】
次に本発明の真空レギュレータの洗浄方法について説明する。本真空レギュレータの分解後、各部材をオートクレーブにて滅菌、または温水や薬液による浸漬殺菌・消毒、または水蒸気や薬品ガスによる殺菌・消毒等によって洗浄する。なお洗浄の際に本実施例のようにダイヤフラム４がＰＴＦＥ製であれば薬液などによる腐食の心配がないため各部材を分別することなく、まとめて洗浄することが可能である。
【００３１】
【発明の効果】
本発明は以上の様な構造をしており、これを使用することにより以下の優れた効果が得られる。
１．真空ラインから発生する高真空圧を適度な真空圧に抑えることができる。
２．調圧ハンドルを回転することで任意の真空圧を一定に調節することができ、使用目的に合った真空圧で使用できる。
３．部品点数が極めて少なく、工具を一切使用することなく、組み立て、分解が極めて容易に行うことができ、特に医療分野においては機器のメンテナンス及び機器の洗浄時間を大幅に短縮できる。
４．ダイヤフラムをＰＴＦＥ製にすると、吸引時における汚物等の付着が少なくなるとともに、機器の洗浄の際、各部材を分別することなくまとめて洗浄することができ、洗浄時間を大幅に短縮できる。
【図面の簡単な説明】
【図１】本発明の実施例を示す真空レギュレータの開状態を示す縦断面図である。
【図２】図１の分解斜視図である。
【図３】図１の本体の斜視図である。
【図４】図１の閉状態を示す縦断面図である。
【図５】図１の第一弁室に真空圧が生じたときの縦断面図である。
【図６】本実施例の使用状態を示す概略図である。
【図７】真空レギュレータを示す部分縦断面図である。
【符号の説明】
１…本体
２…調圧ねじ
３…調圧ハンドル
４…ダイヤフラム
５…固定体
６…バネ弾性体
７…第一弁室
８…環状凹部
９…支持体
１０…天井面
１１…ガイド溝
１２…嵌合部
１３…円孔部
１４…切り欠き部
１５…係合用溝
１６…円環状凹部
１７…テーパ部
１８…嵌着突部
１９…環状係止部
２０…出口流路
２１…入口流路
２２…雄ねじ部
２３…連通口
２４…環状溝
２５…ストッパー部
２６…Ｏリング
２７…Ｏリング
２８…把持部
２９…凹部
３０…雌ねじ部
３１…嵌着部
３２…テーパ部
３３…係合用溝
３４…膜部
３５…中央部
３６…流路制御部
３７…弁体
３８…バネ受け部
３９…環状係止部
４０…嵌合突部
４１…円弧状突起部
４２…円弧状凹部
４３…外気連通路
４４…第二弁室
４５…真空ポンプ
４６…真空機器動作部
４７…三方弁
４８…流入口
４９…第一流出口
５０…第二流出口
５１…チューブ
５２…チューブ
５３…チューブ
５４…チューブ
５５…チューブ
５６…吸引口
５７…トラップ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vacuum regulator that is provided in a vacuum device such as a suction device and a vacuum transfer device used in various fields such as medical treatment and conveyance, and adjusts a vacuum pressure acting on the device. Mainly suitable for use in medical aspirators, it can be suppressed to a moderate vacuum pressure, and can be adjusted to any vacuum pressure, the number of parts is extremely small, and disassembly, cleaning and assembly are easily performed. The present invention relates to a vacuum regulator that can be used.
[0002]
[Prior art]
FIG. 7 shows a conventional vacuum regulator (for example, Patent Document 1). In the figure, a regulator, which is a vacuum regulator, connects vacuum generating means such as a vacuum pump (not shown) to the primary side, and connects an operation unit (not shown) of vacuum equipment to the secondary side. It is configured as a so-called vacuum regulator for regulating the vacuum pressure acting on the part. A port 113 and a valve seat 114 constituting the valve 102 are formed in a casing 101 which is a main body of the adjuster. An outlet flow passage 103 communicating with the port 113 is connected to a vacuum pump (not shown), and a diaphragm 105 is disposed in a chamber 104 communicating with the port 113 of the casing 101, and a secondary chamber 117 sealed by the diaphragm 105 and an adjustment chamber 118. The operating section of the vacuum device is connected to the secondary chamber 117 via the connected inlet channel 106. The diaphragm 105 is configured to be pressed and fixed to the casing 101 by the pressing member 107 so that the secondary chamber 117 can be kept airtight. Further, a valve body 115 is provided through the center of the diaphragm 105, and the valve body 115 is urged toward the valve seat 114 by a spring 108 disposed between the diaphragm 105 and the pressing member 107. A step 116 is formed to contact the bottom 120 of the step 110. A screw member 110 in which a spring 111 is disposed is screwed to an inner periphery of a bushing 109 screwed to an inner periphery of the casing 101, and an adjustment handle 112 is fixed to an end.
Also, the operation is as follows. First, a vacuum pressure is applied from the vacuum pump to the secondary chamber 117 through the inlet channel 106 to rotate the adjustment handle 112, whereby the screw member 110 rotates with the rotation, and the diaphragm It moves in a direction away from 105. The movement of the screw member 110 is transmitted to the valve body 115 via the spring 111, and the valve body 115 is separated from the valve seat 114 to open the valve 102 at a predetermined opening. As a result, a vacuum pressure corresponding to the opening of the valve 102 acts on the secondary chamber 117, and acts on the operating part of the vacuum device via the inlet channel 106.
[0003]
[Patent Document 1]
JP-A-5-19867 (page 3-4, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, the conventional vacuum regulator has a very large number of parts and a very complicated structure as described above. For this reason, there has been a problem that the disassembly, cleaning, and assembly are extremely difficult, particularly when used as a vacuum pressure adjustment for a medical suction device that requires sterilization and disinfection after disassembly.
[0005]
The present invention has been made in view of the above-described problems of the related art, and can suppress a vacuum pressure generated from a vacuum line to an appropriate vacuum pressure and can adjust an arbitrary vacuum pressure to a constant value. It is still another object of the present invention to provide a vacuum regulator which has a very small number of parts and can be easily disassembled, cleaned and assembled.
[0006]
[Means for Solving the Problems]
The configuration of the present invention will be described with reference to FIGS. 1 and 2. The first valve chamber 7 has an annular recess 8 at an upper portion, a fitting portion 12 is provided at a lower end, and A main body 1 having an inlet flow path 21 communicating with the valve chamber 7 and an outlet flow path 20 communicating with the first valve chamber 7 via a communication port 23 of the pressure adjusting screw 2 to be described later and connected to a vacuum line; It has a communication port 23 that is inserted into the center of the main body 1 and communicates with the outlet flow path 20 of the main body 1 and the first valve chamber 7, and a stopper 25 provided on the lower outer periphery. A pressure adjusting screw 2 having a male screw portion 22 which is non-rotatably supported in a sealed state in an annular support 9 forming an annular concave portion 8 and protrudes from an upper portion of the main body 1; and a male screw portion of the pressure adjusting screw 2 A pressure adjusting handle 3 screwed to the upper end of the main body 1 and rotatably fitted to the upper end of the body 1; A valve body 37 that forms a flow path control part 36 in cooperation with the port 23, a diaphragm 4 having an annular locking part 39 on the periphery and a membrane part 34 formed thinner than the central part 35, 1, a fixed body 5 having an outside air communication passage 43 for holding and fixing the annular locking portion 39 of the diaphragm 4 with the main body 1 and the annular concave portion 8 of the main body 1, The first feature is that a spring elastic body 6 sandwiched between the ceiling surface 10 of the annular concave portion 8 and the upper surface of the diaphragm 4 is provided.
[0007]
Further, a fitting projection 18 having an annular locking portion 19 provided integrally with an upper end portion of the main body 1 and projecting in an outer peripheral radial direction and having a plurality of cuts, and the pressure adjusting handle 3 are provided. The second feature is that the cover is detachably fitted.
[0008]
A third feature is that an annular groove 24 constantly communicating with the outlet channel 20 is provided on the outer periphery of the pressure adjusting screw 2.
[0009]
Further, the fourth feature is that the diaphragm 4 is made of polytetrafluoroethylene (hereinafter, referred to as PTFE).
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings, but it is needless to say that the present invention is not limited to the examples. FIG. 1 is a longitudinal sectional view showing an open state of the vacuum regulator according to the present invention. FIG. 2 is an exploded perspective view of FIG. FIG. 3 is a perspective view of the main body of FIG. 4 is a longitudinal sectional view showing the closed state of FIG. 1, and FIG. 5 is a longitudinal sectional view when a vacuum pressure is generated in the first valve chamber of FIG. FIG. 6 is a schematic diagram showing a use state of the present embodiment.
[0011]
1 to 3, reference numeral 1 denotes a main body made of polyvinylidene fluoride (hereinafter referred to as PVDF), in which a first valve chamber 7 having an annular concave portion 8 formed therein is formed. An annular support 9 is provided so as to protrude, and a guide groove 11 into which a stopper 25 of the pressure adjusting screw 2 described later slides and fits is provided at an end of the support 9. An annular fitting portion 12 is provided at a lower portion of the main body 1, and a circular hole portion 13 that receives a fitting projection 40 of the fixed body 5 described below is provided at an inner peripheral lower end of the fitting portion 12. . In the radial direction of the circular hole portion 13, a cutout portion 14 having substantially the same diameter as the arc-shaped projection 41 of the fixed body 5 described later is provided in an enlarged manner, and further inserted into the upper portion of the cutout portion 14. 5, an engagement groove 15 provided over the entire circumference so that the arc-shaped protrusion 41 rotates in the circumferential direction and engages with the main body, and an annular ring provided on the ceiling surface of the engagement groove 15 The concave portion 16 and a tapered portion 17 whose diameter decreases from the annular concave portion 16 toward the annular concave portion 8 are provided integrally. On the other hand, at the upper end of the main body 1, a fitting projection 18 into which the pressure regulating handle 3 described later is fitted is provided so as to protrude integrally therewith, and is provided at an upper portion of the fitting projection 18 in a radial direction of the outer periphery. The fitting projection 18 has a plurality of longitudinal cuts throughout. In addition, an inlet channel 21 communicating with the first valve chamber 7 and an outlet channel 20 communicating with the first valve chamber 7 via a communication port 23 of the pressure regulating screw 2 described later are provided on the side surface of the main body 1. ing. Although the outlet channel 20 and the inlet channel 21 are provided in the same direction in this embodiment, they may be provided in any direction as long as they are on the same circumferential side surface.
[0012]
The fitting projection 18 of the present embodiment has a structure having a plurality of cuts. This is because the fitting projection 18 has an inner diameter when the fitting projection 18 and the pressure regulating handle 3 described below are attached and detached. It can be easily attached and detached by contracting in the direction, and does not come off from the main body 1 in normal use, so that it can be smoothly rotated without moving up and down. Although the fitting projection 18 of this embodiment has a structure having a plurality of cuts, it has a fitting structure that can be attached to and detached from the pressure adjusting handle 3 and that can smoothly rotate without moving up and down. If it is, there is no particular limitation.
[0013]
Reference numeral 2 denotes a substantially cylindrical PVDF pressure adjusting screw inserted into the center of the main body 1. The upper end of the pressure adjusting screw 2 has a male thread 22 projecting from the upper part of the main body 1. The outer peripheral surface has an annular groove 24 that constantly communicates with the outlet flow path 20, and a communication port 23 that communicates with the annular groove 24 from the lower end of the pressure adjusting screw 2. The main body 1 communicates from the inlet flow path 21 to the outlet flow path 20 via the first valve chamber 7, the communication port 23, and the annular groove 24. A pair of stopper portions 25 protruding in the radial direction are provided on the outer periphery of the lower portion of the pressure adjusting screw 2 at positions facing each other, and are slidably fitted in the guide grooves 11 of the main body 1. Further, annular grooves are provided on the outer peripheral surface at a position between the male screw portion 22 and the annular groove 24 and on the outer peripheral surface at a position between the annular groove 24 and the stopper portion 25, and O-rings 26 and 27 are fitted therein. The pressure adjusting screw 2 is non-rotatably supported on the support 9 of the main body 1 in a sealed state.
[0014]
Reference numeral 3 denotes a PVDF pressure adjusting handle screwed to the male screw portion 22 of the pressure adjusting screw 2 and rotatably fitted to the fitting projection 18 at the upper end of the main body 1. A cylindrical grip portion 28 is provided at an upper portion of the pressure adjusting handle 3, and a cylindrical concave portion 29 having a bottom and opened downward is provided inside the pressure adjusting handle 3. A female screw portion 30 is provided on an upper inner peripheral surface of the concave portion 29, and a fitting portion 31 is provided on a lower inner peripheral surface. The fitting portion 31 includes a tapered portion 32 for contracting the fitting projection 18 of the main body 1 in the inner circumferential direction, and an engaging portion for engaging the annular locking portion 19 of the main body 1 on the upper portion of the tapered portion 32. It has a groove 33. The shape of the grip portion 28 may be a hexagonal prism or an octagonal prism, and the shape is not particularly limited. Further, in this embodiment, the fitting portion 31 has a structure having a tapered portion 32 and an engagement groove 33 for fitting to the fitting projection 18 of the main body 1. 1 is not particularly limited as long as it has a fitting structure that can be attached to and detached from the device 1 and can rotate smoothly without vertical movement. Further, a scale for adjusting the opening may be provided on the peripheral side surface of the pressure adjusting handle 3 and the main body 1.
[0015]
Reference numeral 4 denotes a PTFE diaphragm, and the membrane portion 34 is formed thinner than the central portion 35. The upper surface of the central portion 35 is formed in a planar shape and serves as a spring receiving portion 38 for holding the spring elastic body 6, which will be described later. A valve element 37 forming the path control section 36 is provided. An annular locking portion 39 having a rectangular cross section is provided on the outer periphery of the film portion 34, and is fixedly held between the main body 1 and the fixed body 5 described below while being fitted into the annular concave portion 16 of the main body 1.
[0016]
Reference numeral 5 denotes a fixed body made of PVDF fitted to the fitting portion 12 of the main body 1. An annular fitting protrusion 40 is provided on the upper part of the fixed body 5. The fitting projection 40 includes an arc-shaped projection 41 that is inserted into the notch portion 14 of the main body 1 on the peripheral side surface of the upper end portion and is circumferentially rotated to protrude in the radial direction to be engaged with the main body 1. An arcuate concave portion 42 for clamping the annular locking portion 39 of the diaphragm 4 is integrally provided on the inner periphery of the upper end surface, and is engaged and fixed to the main body 1 by a bayonet method. An outside air communication passage 43 is provided at the center of the lower end of the fixed body 5, and a second valve chamber 44 formed together with the diaphragm 4 is provided inside the fixed body 5, communicating with the outside air through the outside air communication passage 43. I have. The second valve chamber 44 is sealed off from the first valve chamber 7 of the main body 1 by the diaphragm 4.
[0017]
Reference numeral 6 denotes a spring elastic body coated with a fluororesin. It is inserted into the annular concave portion 8 of the main body 1 and is held between the ceiling surface 10 of the first valve chamber 7 and the spring receiving portion 38 of the diaphragm 4. Although the fluororesin coating of the spring elastic body 6 is not necessarily required, the fluorine coating has an effect of excellent chemical resistance and an effect of preventing rust. In the present embodiment, a spring is used as the elastic body, but an elastic body such as a bellows or rubber may be used, and there is no particular limitation.
[0018]
In the present invention, the material of each member such as the main body 1 except the diaphragm 4 and the spring elastic body 6 is made of PVDF, but may be polyvinyl chloride, polypropylene, other fluororesin, other plastic or metal, and is not particularly limited. . As the material of the diaphragm 4, a fluororesin such as PTFE is preferably used, but rubber or metal may be used when the requirement of chemical resistance is not so severe.
[0019]
As described above, the present invention has a configuration in which the number of parts is extremely small as compared with the conventional technology.
[0020]
Next, the operation of the vacuum regulator of the present embodiment will be described with reference to FIGS. 1 and 4 to 6.
[0021]
In FIG. 4, a vacuum line (not shown) such as a vacuum pump is connected to the outlet flow path 20 of the vacuum regulator of the present embodiment in which the flow path control unit 36 is closed, and the closed flow is connected to the inlet flow path 21. A road opening / closing means (not shown) is connected. When the pressure control handle 3 is first turned in a direction in which the flow path control unit 36 is opened in a state where the pressure in the outlet flow path 20 is reduced by the vacuum line, the pressure control screw 2 is rotated with the rotation of the pressure control handle 3. At the same time, the communication port 23 is separated from the valve body 37 of the diaphragm 4, and the flow path control unit 36 is opened. Thereby, the outlet flow path 20 and the first valve chamber 7 communicate with each other, and the pressure in the first valve chamber 7 is reduced. At this time, the pressure in the second valve chamber 44, which is isolated from the first valve chamber 7 in a sealed state by the diaphragm 4 and communicates with the atmosphere via the outside air communication passage 43, is reduced in the first valve chamber 7. Since the pressure is higher than the pressure, an upward force is applied to the diaphragm 4 in the initial flat state. As the pressure difference between the second valve chamber 44 and the first valve chamber 7 increases, the upward force starts to become larger than the elastic force of the spring elastic body 6, the diaphragm 4 deforms into a mountain shape, and the valve body 37 communicates. It approaches the port 23 and is finally pressed against, and the flow path control unit 36 is closed (the state of FIG. 5).
[0022]
When the opening / closing means of the flow path connected to the inlet flow path 21 in the closed state is opened from the state of FIG. 5, the pressure in the first valve chamber 7 becomes higher than the above state, and the pressure in the second valve chamber 44 becomes lower. The pressure difference becomes smaller. Therefore, the upward force of the diaphragm 4 is weakened, and the elastic force of the spring elastic body 6 causes the diaphragm 4 to be in a flat state and return to the original position. At this time, the valve element 37 of the diaphragm 4 is separated from the communication port 23, a certain opening degree is secured in the flow path control unit 36, and suction can be performed at a certain vacuum pressure from the inlet flow path 21 (FIG. 1). State). For this reason, the vacuum pressure generated from the vacuum line can be controlled at a constant vacuum pressure in a state where the vacuum pressure is appropriately suppressed through the vacuum regulator.
[0023]
When adjusting the vacuum pressure to the target value, the pressure adjustment handle 3 is rotated, and the pressure adjustment screw 2 moves up and down with the rotation, and the opening degree of the flow path control unit 36 is adjusted. Thus, the vacuum pressure for suction from the inlet channel 21 is controlled according to the capacity of the vacuum line and the adjusted opening degree of the channel controller 36. In addition, if a pressure gauge is provided in the flow path, it is possible to control the vacuum pressure accurately.
[0024]
Next, an embodiment of the vacuum regulator according to the present embodiment will be described with reference to FIG. 6, in which a medical device, in particular, a vacuum regulator used for vacuuming a suction device or the like for aspirating dirt or the like adhered to a patient's throat or trachea. explain. First, a vacuum pump 45 is connected to the outlet channel 20 of the vacuum regulator via a tube 51. Next, the first outlet 49 of the three-way valve 47 is connected to the inlet channel 21 via the tube 52, and the second outlet 50 of the three-way valve 47 is connected to communicate with the tube 51 via the tube 54. The vacuum device operation unit 46 is connected to the inflow port 48 of the valve 47 via the tube 53. At this time, the three-way valve 47 is switched so that the inflow port 48 and the first outflow port 49 communicate with each other. Inside the vacuum device operating section 46, a tube 53 from a three-way valve 47 is connected to a trap 57, a tube 55 extends from the trap 57, and a suction port 56 sucks dirt and the like attached to a patient. It has become. Since the vacuum pump 45 operates via a vacuum regulator, the ability to be suctioned from the suction port 56 can be adjusted by the vacuum regulator. Therefore, it can be used for a patient with the vacuum pressure adjusted by the vacuum regulator according to the condition of the patient, and even if the suction port 56 directly hits the skin or the like of the patient and an excessive vacuum pressure acts, Due to the above structure, the upward force on the diaphragm 4 becomes large with respect to the elastic force of the spring elastic body 6, the flow path control unit 36 is closed to prevent excessive vacuum pressure, and excessive suction works. It does not hurt the patient without doing. That is, filth and the like can be safely sucked. The sucked dirt accumulates in the trap 57. Air is sucked from the tube 53 to the vacuum pump 45. A float or the like may be provided so that the dirt accumulated in the trap 57 does not enter the vacuum regulator from the tube 53. Although the distance between the vacuum regulator and the three-way valve 47 is not particularly limited, it is preferable that the vacuum regulators and the three-way valve 47 are installed near each other in consideration of easy adjustment and switching of suction.
[0025]
The three-way valve 47 has a function of switching to any one of three stages of communication between the inlet 48 and the first outlet 49, communication between the inlet 48 and the second outlet 50, and closing of the flow path. According to usage conditions, three stages of suction using vacuum pressure adjusted by a vacuum regulator, suction using high vacuum pressure directly from the vacuum pump 45, and stopping suction can be selected. The structure of the three-way valve 47 is not particularly limited as long as the three-way valve 47 can be connected to two outlets and can be switched between closing and closing.
[0026]
Further, when the three-way valve 47 is aligned with the second outflow port 50, the vacuum pump 45 operates without passing through the vacuum regulator, so that the suction can be performed by the high vacuum pressure applied from the vacuum pump 45, and a strong suction force can be obtained. can get. When the three-way valve 47 is closed, the flow path from the suction port 56 to the vacuum pump 45 can be shut off at the three-way valve 47, so that the suction can be stopped without stopping the vacuum pump 45. Therefore, it is possible to temporarily stop the suction or to shut off the emergency.
[0027]
Next, a method of assembling the vacuum regulator according to the present embodiment will be described with reference to FIGS.
First, the fitting portion 31 of the pressure adjusting handle 3 is fitted to the fitting projection 18 at the upper end of the main body 1. Next, the pressure adjusting screw 2 to which the O-ring 26 and the O-ring 27 are fitted is inserted from the lower part of the main body 1 and screwed to the pressure adjusting handle 3. Further, the pressure adjusting screw 2 is pulled up by rotating the pressure adjusting handle 3 until the stopper portion 25 contacts the upper end surface of the guide groove 11, and the pressure adjusting screw 2 is supported on the support 9 of the main body 1. Next, the spring elastic body 6 is fitted into the annular concave portion 8 of the main body 1, and the annular locking portion 39 of the diaphragm 4 is fitted into the annular concave portion 16 of the main body 1 and fixed to the main body 1. Next, after the arc-shaped projection 41 of the fixed body 5 is pressed down to the position of the engagement groove 15 through the notch 14 of the main body 1, the fixed body 5 is rotated by 90 degrees in the circumferential direction to thereby fix the fixed body 5. The fixed body 5 is engaged and fixed to the main body 1 by a so-called bayonet method in which the arc-shaped projection 41 is engaged with the engaging groove 15 of the main body 1. At this time, the annular locking portion 39 of the diaphragm 4 is fitted into the arc-shaped concave portion 42 of the fixed body 5, and the spring elastic body 6 is connected to the ceiling surface 10 of the first valve chamber 7 of the main body 1 and the spring receiving portion 38 of the diaphragm 4. It is pinched by. In the present embodiment, the fixing method of the main body 1 and the fixed body 5 is engaged and fixed by the bayonet method. May be used, and there is no particular limitation.
[0028]
The annular groove 24 has a width that always communicates with the outlet passage 20 even when the pressure adjusting screw 2 moves up and down, and is provided over the entire outer periphery of the pressure adjusting screw 2. Since the communication port 23 and the outlet channel 20 can always be communicated regardless of the circumferential position of the pressure screw 2, the assembling can be performed without worrying about the circumferential position of the pressure adjusting screw 2 during assembly. And assembly can be performed easily and in a short time. Furthermore, even if the pressure adjusting screw moves up and down, the continuous flow path between the communication port 23 and the outlet flow path 20 is not restricted. In the present embodiment, the annular groove 24 is a groove extending over the entire outer periphery of the pressure adjusting screw 2. However, the annular groove 24 may be partially provided as long as it is always in communication with the outlet channel 20, and is not particularly limited.
[0029]
As described above, the vacuum regulator of this embodiment is extremely easy to assemble, and does not require any tools required for assembly. In addition, the disassembling method may be performed in the reverse order of the above-described assembling, the disassembly is easy, and no tools are required as in the assembling.
[0030]
Next, a method for cleaning the vacuum regulator of the present invention will be described. After disassembly of the vacuum regulator, each member is sterilized in an autoclave, or washed by immersion sterilization / disinfection using warm water or a chemical solution, or sterilization / disinfection using steam or a chemical gas. When the diaphragm 4 is made of PTFE as in the present embodiment at the time of cleaning, there is no fear of corrosion due to a chemical solution or the like, so that the members can be cleaned together without separating the members.
[0031]
【The invention's effect】
The present invention has the above-described structure, and the use of the same provides the following excellent effects.
1. The high vacuum pressure generated from the vacuum line can be suppressed to an appropriate vacuum pressure.
2. By rotating the pressure adjusting handle, an arbitrary vacuum pressure can be adjusted to a constant value, and the vacuum pressure can be used according to the purpose of use.
3. The number of parts is extremely small, assembly and disassembly can be performed extremely easily without using any tools, and in the medical field in particular, maintenance time of equipment and cleaning time of equipment can be greatly reduced.
4. When the diaphragm is made of PTFE, adhesion of dirt and the like at the time of suction is reduced, and at the time of cleaning the equipment, each member can be cleaned at a time without separating the components, thereby greatly shortening the cleaning time.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an open state of a vacuum regulator according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of FIG.
FIG. 3 is a perspective view of the main body of FIG. 1;
FIG. 4 is a longitudinal sectional view showing a closed state of FIG. 1;
FIG. 5 is a longitudinal sectional view when a vacuum pressure is generated in a first valve chamber of FIG. 1;
FIG. 6 is a schematic view showing a use state of the present embodiment.
FIG. 7 is a partial longitudinal sectional view showing a vacuum regulator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Pressure adjusting screw 3 ... Pressure adjusting handle 4 ... Diaphragm 5 ... Fixed body 6 ... Spring elastic body 7 ... First valve chamber 8 ... Annular recess 9 ... Support 10 ... Ceiling surface 11 ... Guide groove 12 ... Fitting Joining part 13 ... Circular hole part 14 ... Notch part 15 ... Engaging groove 16 ... Circular annular concave part 17 ... Taper part 18 ... Fiting projection 19 ... Circular locking part 20 ... Outlet channel 21 ... Inlet channel 22 ... Male screw part 23 ... Communication port 24 ... Circular groove 25 ... Stopper part 26 ... O ring 27 ... O ring 28 ... Grip part 29 ... Depression 30 ... Female screw part 31 ... Fit part 32 ... Taper part 33 ... Engagement groove 34 ... Film Part 35 Central part 36 Flow control part 37 Valve body 38 Spring receiving part 39 Annular locking part 40 Fitting protrusion 41 Arc-shaped projection 42 Arc-shaped concave part 43 External air communication passage 44 Second valve chamber 45 ... Vacuum pump 46 ... Vacuum device operating section 47 ... Three-way valve 48 ... Inlet 49 ... First Outlet 50 ... second outlet 51 ... Tube 52 ... Tube 53 ... Tube 54 ... Tube 55 ... Tube 56 ... suction port 57 ... trap

Claims

A first valve chamber (7) having an annular concave portion (8) at an upper portion, a fitting portion (12) at a lower end, and an inlet flow path (10) communicating with the first valve chamber (7). 21) and a main body (1) having an outlet flow path (20) communicating with the first valve chamber (7) via a communication port (23) of a pressure adjusting screw (2) to be described later and connected to a vacuum line. And a communication port (23) which is inserted into the center of the main body (1) and communicates with the outlet flow path (20) of the main body (1) and the first valve chamber (7), and a stopper provided on the lower outer periphery. An annular support (9) having an annular recess (8) of the first valve chamber (7), which is non-rotatably supported in a sealed state and has an upper part (1); A pressure adjusting screw (2) having a male screw portion (22) projecting from the pressure adjusting screw (2) and a male screw portion (22) of the pressure adjusting screw (2) are screwed into the pressure adjusting screw (2) and rotatably fitted to the upper end of the main body (1). Dressed A pressure adjusting handle (3), a valve element (37) that forms a flow path control section (36) in the center in cooperation with a communication port (23) of the pressure adjusting screw (2), and a peripheral edge portion. A diaphragm (4) having an annular locking portion (39), the membrane portion (34) being formed thinner than the central portion (35), and a fitting portion (12) of the main body (1); A fixed body (5) having an outside air communication passage (43) that clamps and fixes the annular locking portion (39) of the diaphragm (4) to the main body (1), and fits in the annular concave portion (8) of the main body (1). A vacuum regulator comprising a spring elastic body (6) inserted and held between a ceiling surface of an annular concave portion (8) and an upper surface of a diaphragm (4).

A fitting projection (18) integrally provided at an upper end of the main body (1) and having a plurality of cuts and having an annular locking portion (19) protruding in an outer peripheral radial direction; 2. The vacuum regulator according to claim 1, wherein the handle is detachably fitted.

The vacuum regulator according to claim 1 or 2, wherein an annular groove (24) constantly communicating with the outlet channel (20) is provided on an outer periphery of the pressure adjusting screw (2).

The vacuum regulator according to any one of claims 1 to 3, wherein the diaphragm (4) is made of polytetrafluoroethylene.