JP4133234B2

JP4133234B2 - Direct acting slide solenoid valve and oxygen collector

Info

Publication number: JP4133234B2
Application number: JP2002322820A
Authority: JP
Inventors: 治菅野; 隆之入子
Original assignee: Saginomiya Seisakusho Inc
Current assignee: Saginomiya Seisakusho Inc
Priority date: 2002-11-06
Filing date: 2002-11-06
Publication date: 2008-08-13
Anticipated expiration: 2022-11-06
Also published as: JP2004156700A

Description

【０００１】
【発明の属する技術分野】
この発明は、直動スライド式電磁弁および酸素採集器に関し、特に、電磁ソレノイド装置によってブロック状の弁体を直結駆動して流路切換や流量制御を行う直動スライド式電磁弁および酸素採集器に関するものである。
【０００２】
【従来の技術】
直動スライド式電磁弁は、電磁ソレノイド装置のプランジャに連結されたブロック状の弁体の平面状の前面が平面状の弁座面に対して軸線方向に摺接摺動することにより、前記弁座面に開口しているポートの開閉して流路切換や流量制御を行う。
【０００３】
従来、この種の直動スライド式電磁弁としては、電磁ソレノイド装置のプランジャにリベット等によって固定された板状の弁体ホルダに弁体が弁座面に対して離接する方向に移動可能に取り付けられ、弁体ホルダに取り付けられた板ばねによって弁体を背面側から弁座面に押し付けるものや（例えば、特許文献１、２、３）、弁室内圧を弁体の背面側に作用させて弁体を弁座面に押し付けるもの（例えば、特許文献４）が知られている。
【０００４】
【特許文献１】
実公平４−４７４９３号公報
【特許文献２】
特公平４−７７８４０号公報
【特許文献３】
特公平６−６３５７７号公報
【特許文献４】
特開２０００−７４２４８号公報
【０００５】
【発明が解決しようとする課題】
直動スライド式電磁弁で使用される電磁ソレノイド装置ではプランジャの廻り止めが行われていないから、通常動作過程でプランジャが自身の中心軸線周りに回転し、この回転力が弁体に作用する。これは、従来の直動スライド式電磁弁では、弁体の平面状の前面が平面状の弁座面に摺接している状態で、弁体を弁座面に対して回転させる力となり、弁体前面が偏荷重状態で弁座面に押し付けられることになる。このため、弁体前面と弁座面との平行性が保たれ難く、偏摩耗、弁漏れを生じ易い。
【０００６】
また、従来の直動スライド式電磁弁では、プランジャに対する弁体ホルダの組み付け、板ばねのリベット止め等、部品点数が多いばかりでなく、組立工数も多いと云う問題点もある。
【０００７】
この発明は、上述の如き問題点を解消するためになされたもので、プランジャの回転による回転力が弁体に作用することを回避し、偏摩耗、弁漏れを生じることがなく、しかも、部品点数、組立工数の削減を図ることができる直動スライド式電磁弁、更にはスライド弁特有の静音性を更に向上し、優れた静音性を有し、動作音が小さいことを要求される在宅酸素療法等で使用される医療用酸素濃縮器のための酸素採集器で用いられる四方弁として好適な直動スライド式電磁弁、その直動スライド式電磁弁を四方弁として組み込まれた酸素採集器を提供することを目的としている。
【０００８】
【課題を解決するための手段】
上述の目的を達成するために、この発明による直動スライド式電磁弁は、電磁ソレノイド装置のプランジャに連結され、弁体押さえばねにより平面状の弁座面側に付勢されたブロック状の弁体の平面状の前面が前記弁座面に対して軸線方向に摺接摺動することにより前記弁座面に開口しているポートの開閉を行う直動スライド式電磁弁において、前記プランジャは、軸線方向両端にフランジ面をもった円形横断面の弁体保持軸部を有し、前記弁体は、背面側に形成された略半円形横断面の溝部を有し、前記弁体押さえばねは、半円状逃げ部が形成された一対の端片と該一対の端片間を前記逃げ部の両側で接続し、中間部に突起形状のばね作用部がそれぞれ形成された一対のブリッジ辺部とを有し、前記フランジ面間において前記弁体保持軸部の略直径方向の両側に前記一対のブリッチ片部を位置させ、前記フランジ面間に挟まれて前記フランジ面に前記端片が弾接されるように前記弁体押さえばねを前記弁体保持軸部に嵌合装着するとともに、該嵌合装着された前記弁体押さえばねの前記端片を介して前記弁体が前記フランジ面間に挟まれて軸線方向移動を拘束され、前記一対のブリッジ辺部の前記ばね作用部が前記弁体の軸線方向と直交しかつ前記弁座面と平行な径方向の線上で前記弁体の前記溝部の両側中央部分にそれぞれ当接して前記弁体の前面を前記弁座面に垂直な方向に前記弁座面に押し付けるように、前記プランジャの前記弁体保持軸部に前記弁体を嵌合装着したことを特徴とする。
【０００９】
この発明による直動スライド式電磁弁によれば、半円状逃げ部が形成された一対の端片と該一対の端片間を前記逃げ部の両側で接続し、中間部に突起形状のばね作用部がそれぞれ形成された一対のブリッジ辺部とを有する弁体押さえばねを採用し、プランジャの弁体保持軸部が軸線方向両端に有するフランジ面間において弁体保持軸部の直径方向の両側に弁体押さえばねの一対のブリッチ片部を位置させ、フランジ面間に挟まれてフランジ面に弁体押さえばねの端片が弾接されるように弁体押さえばねを弁体保持軸部に嵌合装着するとともに、この嵌合装着された弁体押さえばねの端片を介して弁体がフランジ面間に挟まれて軸線方向移動を拘束され、一対のブリッジ辺部の中間部のばね作用部が弁体の軸線方向と直交しかつ弁座面と平行な径方向の線上で弁体の溝部の両側中央部分にそれぞれ当接して弁体の前面を弁座面に垂直な方向に弁座面に押し付けるようにプランジャの弁体保持軸部に弁体を嵌合装着しているので、弁体は背面側に形成された略半円形横断面の溝部によって弁体の中心軸線周りの回動を阻害しない態様でプランジャの円形横断面の弁体保持軸部に回動可能に、かつ弁体押さえばねの端片を介してプランジャとともに軸線方向に移動可能に係合していて、プランジャが回転してもプランジャと共に弁体が回転（回動）することが、確実に規制されるとともに、摩擦伝達によるその回転力が弁体に直接作用することがない。
【００１２】
また、半円状逃げ部が形成された一対の端片と該一対の端片間を逃げ部の両側で接続し、中間部に突起形状のばね作用部がそれぞれ形成された一対のブリッジ辺部とを有する弁体押さえばねを採用し、一対のブリッジ辺部の中間部のばね作用部が弁体の軸線方向と直交しかつ弁座面と平行な径方向の線上で弁体の溝部の両側中央部分にそれぞれ当接して弁体の前面を弁座面に垂直な方向に弁座面に押し付けるようにしているので、プランジャが回転しても摩擦伝達によるその回転力が弁体に直接作用することがなく、摩擦伝達による弁体押さえばねの回転力によって弁体の溝部の両側中央部分に当接する力に差が生じても、弁体を変位させる力を生じさせることがない。
また、通常、プランジャの弁体保持軸部の軸線方向の変化に伴って弁体押さえばねの弁体に対する関係が変化しても、ばね作用部が弁体の溝部の両側中央部分にそれぞれ当接しているので、弁体前面が偏荷重状態で弁座面に押し付けられることがない。
【００１３】
また、この発明による直動スライド式電磁弁は、前記弁体が弁ハウジングに形成された弁室内にあり、前記弁座面は前記弁室の壁面の一部をなす部材として前記弁ハウジングとは別部材の弁座部材により与えられ、当該弁座部材は前記弁座面を前面として前記弁体保持軸部の径方向の押し込みによって前記弁ハウジングに組み込まれる構造にすることができる。
【００１４】
この直動スライド式電磁弁では、弁座面を前面として弁座部材が弁体保持軸部の径方向に押し込まれることにより、弁座面が弁体の前面に当接し、弁体前面が弁座面と平行になるように、弁体が弁体保持軸部の中心軸線周りに回動し、弁体の姿勢が自己修正される。
【００１５】
また、この発明による直動スライド式電磁弁は、前記弁体が弁ハウジングに形成された弁室内にあり、前記弁座面は、前記弁室の壁面の一部をなし、前記弁室に第１ポートが開口し、前記弁座面に第２ポートと第３ポートと第４ポートの３個のポートが軸線方向に整列して開口し、前記弁体は、前記第２ポートを前記弁室に開放して前記第３ポートと前記第４ポートとを連通接続する第１の流路切換位置と、前記第４ポートを前記弁室に開放して前記第２ポートと前記第３ポートとを連通接続する第２の流路切換位置との間に軸線方向移動し、四方弁をなしている。
【００１６】
この発明による直動スライド式電磁弁は、更に、前記第１の流路切換位置と前記第２の流路切換位置は各々前記プランジャが固定側のストッパ面に当接することにより決まり、その固定側のストッパ面と、この固定側のストッパ面に当接する前記プランジャの端面とのうち少なくとも一方が、緩衝材により構成されており、ストッパ衝突音の低減が図られている。
【００１７】
また、上述の目的を達成するために、この発明による酸素採集器は、窒素吸着を行う再生可能な２つの吸着筒を有し、当該２つの吸着筒を空気供給源と排気部に対して窒素吸着の正流方向と吸着窒素パージの逆流方向とに交互に接続して酸素採集を行う酸素採集器であって、前記２つの吸着筒と前記空気供給源および排気部との流路切換を上述の発明による直動スライド式電磁弁によって行う。
【００１８】
【発明の実施の形態】
以下に添付の図を参照してこの発明の実施の形態を詳細に説明する。
図１〜図１１はこの発明による直動スライド式電磁弁を四方弁として実施した一つの実施の形態を示している。
【００１９】
直動スライド式電磁弁は、図１に示されているように、弁ハウジング１と、弁座部材２と、弁体３と、プランジャチューブ４、プランジャ５、吸引子６および電磁コイル７による電磁ソレノイド装置８とを有している。
【００２０】
弁ハウジング１と弁座部材２は個別のアルミニウム製部品である。弁座部材２は弁ハウジング１に形成された横孔部１ＡにＯリング９によって気密に嵌合挿入され、横孔部１Ａに挿入された弁座部材２と弁ハウジング１とが弁室１０を画定している。
【００２１】
横孔部１Ａに対する弁座部材２の押し込み方向、換言すれば、横孔部１Ａの延在方向はプランジャ５の後述する弁体保持軸部３０の径方向（左右方向）になっており、弁座部材２の押し込み方向の前面が弁室１０の壁面の一部をなす平面状の弁座面１１になっている。
【００２２】
弁ハウジング１には弁室１０に開口した第１ポート（Ｃポート）１２が管接続孔として形成されている。垂直平面をなす弁座面１１には、第２ポート（Ｂポート）１３と、第３ポート（Ｄポート）１４と、第４ポート（Ａポート）１５の３個のポートが互いに等間隔をおいて軸線方向（上下方向）に整列して開口している。弁座面１１に開口している３個のポートは、各々、弁座部材２に形成された通路１６、１７、１８によって各々個別に管接続孔１９、２０、２１に連通している。
【００２３】
プランジャチューブ４は、ステンレス鋼製で、下端部外周にステンレス鋼製の取付リング２２をノンフラックス溶接され、取付リング２２を弁ハウジング１に形成されている取付孔１Ｂに嵌合挿入され、取付孔１Ｂの開口縁部のかしめ２３（図９参照）によって弁ハウジング１に固定されている。取付リング２２と取付孔１Ｂとの嵌合部には気密用のＯリング２４が挟まれている。なお、プランジャチューブ４と取付リング２２とのノンフラックス溶接は、図１０に示されているように、プランジャチューブ４の下端側の溶接部２５により行われている。
【００２４】
プランジャチューブ４の上端には吸引子６がノンフラックス溶接によって固着されている。プランジャチューブ４の外周には電磁コイル７が嵌合しており、電磁コイル７はボルト２６によって吸引子６に固定されている。なお、プランジャチューブ４と吸引子６とのノンフラックス溶接は、図１１に示されているように、プランジャチューブ４の上端側の溶接部２７により行われている。
【００２５】
プランジャ５はプランジャチューブ４内に軸線方向に移動可能に設けられている。プランジャ５の吸引子６との対向部は吸引子６の先端部６Ａが入ることができる凹部５Ａになっており、凹部５Ａの深さ分、所要ストロークを確保したプランジャ・吸引子間軸長の短縮が図られている。
【００２６】
凹部５Ａの底部には、ゴム、樹脂等による緩衝材製の消音シート２８が敷かれており、消音シート２８の上面が吸引子６の先端面６Ｂと当接するストッパ面になっている。取付孔１Ｂの底部にも、ゴム、樹脂等による緩衝材製の消音シート２９が敷かれており、消音シート２９の上面がプランジャ５の段差面５Ｂと当接するもう一方のストッパ面になっている。
【００２７】
プランジャ５と吸引子６との間には圧縮コイルばね３４が挟まれている。圧縮コイルばね３４はプランジャ５を下方に付勢している。
【００２８】
プランジャ５は、電磁コイル７に通電が行われていないオフ状態時には、図１に示されているように、圧縮コイルばね３４のばね力によって段差面５Ｂが取付孔１Ｂの消音シート２９に当接する降下位置に位置し、電磁コイル７に通電が行われているオン状態時には、圧縮コイルばね３４のばね力に抗して上昇移動した凹部５Ａの底部の凹部５Ａの消音シート２８が吸引子６の先端面６Ｂと当接する上昇位置に位置する。
【００２９】
プランジャ５の下端側（段差面５Ｂより下側）は、弁ハウジング１に形成された連通孔１Ｃを通って弁室１０内にある。弁室１０内に位置しているプランジャ５の下端部は円形横断面の弁体保持軸部３０になっている。弁体保持軸部３０は軸線方向両端にフランジ面３１、３２を有している。
【００３０】
弁体３は、プラスチックス成形品であってブロック状をなし、弁座面１１に対向する平面状の前面３Ａに連通接続用凹部３Ｂを有し、背面側に略半円形横断面の溝部３Ｃ（図３参照）を形成されている。弁体３は、溝部３Ｃによってプランジャ５の弁体保持軸部３０に中心軸線周りに回動可能に係合し、フランジ面３１、３２間に挟まれて軸線方向移動を拘束されている。この軸線方向移動の拘束により、弁体３は、プランジャ５と直結状態で、プランジャ５と共に軸線方向移動する。
【００３１】
弁体３と弁体保持軸部３０との間には弁体３を弁座面１１の側に付勢する弁体押さえばね３３が設けられている。弁体押さえばね３３は、図３によく示されているように、半円状逃げ部３３Ａ、３３Ｂを有する軸線方向両端の端片３３Ｃ、３３Ｄにてフランジ面３１、３２間に挟まれ、弁体３の中心軸線周りの回動を阻害しない態様で、弁体保持軸部３０に嵌合装着されるコの字形のスケルトン形状をなす板ばねによって構成されている。
【００３２】
弁体押さえばね３３は、フランジ面３１、３２間において弁体保持軸部３０の略直径方向の両側に位置して端片３３Ｃと３３Ｄを接続する一対のブリッチ片部３３Ｅ、３３Ｆを有し、このブリッチ片部３３Ｅ、３３Ｆの各々の中間部に突起形状のばね作用部３３Ｇ、３３Ｈを形成されている。弁体押さえばね３３は、ばね作用部３３Ｇ、３３Ｈが弁体３の背面側溝部３Ｃの両側部分３Ｄ、３Ｅに各々に当接することにより、弁体３を弁座面１１の側に付勢している。
【００３３】
つぎに、弁体３、弁体押さえばね３３、弁座部材２の組立手順を、図４〜図８を参照して説明する。
図４に示されているように、弁体保持軸部３０のフランジ面間寸法Ａ、自由状態での弁体押さえばね３３の端片３３Ｃ、３３Ｄの先端間寸法Ｂｆ、付根端間寸法Ｃは、Ｃ＜Ａ＜Ｂｆである。弁体押さえばね３３の組み込みは、弁座部材２を弁ハウジング１に組み込む以前に、横孔部１Ａをアクセスホールとして、図５に示されているように、端片３３Ｃ、３３Ｄの付根端側より端片３３Ｃ、３３Ｄを内側に変形させながら弁体押さえばね３３を、既に弁室１０内に組み込まれている弁体保持軸部３０のフランジ面３１、３２間に挿入する。
【００３４】
最終的には、図６に示されているように、端片３３Ｃ、３３Ｄの半円状逃げ部３３Ａ、３３Ｂ（図３参照）の奥部が弁体保持軸部３０の外周面に当たるまで行う。この状態では、端片３３Ｃ、３３Ｄの変形による張りによって弁体保持軸部３０に中心軸線周りに回転変位可能に固定される。
【００３５】
この取付状態では、図６に示されているように、弁体押さえばね３３の端片３３Ｃ、３３Ｄの先端間寸法Ｂｓと弁体３の軸線方向寸法Ｄは、Ｂｓ≧Ｄであり、端片３３Ｃ、３３Ｄ間に弁体３を差し込む。この差し込みは、図７（ａ）、（ｂ）に示されているように、弁体３の背面側溝部３Ｃの両側部分３Ｄ、３Ｅの中央部分が、弁体３の軸線方向と直交しかつ弁座面と平行な径方向の線上で弁体押さえばね３３のばね作用部３３Ｇ、３３Ｈに当接するまで行う。
【００３６】
弁体３、弁体押さえばね３３の組み付け完了後に、弁座面１１を前面として弁座部材２を横孔部１Ａに挿入する。この挿入は、弁体保持軸部３０の径方向の押し込みにより行われ、弁座面１１が弁体３の前面３Ａに当接する。弁座部材２が正規の位置まで挿入されると、弁座面１１によって弁体３の前面３Ａが押され、図８（ａ）、（ｂ）に示されているように、弁体前面３Ａが弁座面１１と平行になるように、弁体３が弁体保持軸部３０の中心軸線周りに回動し、弁体３の姿勢が自己修正される。この時には、ばね作用部３３Ｇ、３３Ｈがそれぞれ撓み、弁体３の軸線方向と直交しかつ弁座面１１と平行な径方向の線上で背面側溝部３Ｃの両側部分３Ｄ、３Ｅの中央部分に当接するようになり、弁体３の前面３Ａが両側より弁座面１１に垂直な方向に均等に弁座面１１に押し付けられ、適正な弁締切りシール圧が得られる。
【００３７】
上述したように、弁体３は、背面側に形成された略半円形横断面の溝部３Ｃによってプランジャ５の円形横断面の弁体保持軸部３０に回動可能に係合し、弁体押さえばね３３によって弁座面１１に押し付けられているので、プランジャ５が回転しても、その回転力が弁体３に作用することがなく、弁体３がプランジャ５と共に回転（回動）することがない。
【００３８】
したがって、プランジャ５が回転しても、弁体前面３Ａが平行な状態で弁座面１１に均等に押し付けられた適正状態が保たれ、弁体前面３Ａが偏荷重状態で弁座面１１に押し付けられることがなく、長期間の使用でも、偏摩耗や弁漏れを生じることがない。
【００３９】
つぎに、四方弁としての直動スライド式電磁弁の流路切換について説明する。
電磁コイル７に通電が行われておらず、プランジャ５が図１に示されているように、降下位置に位置している場合には、弁体３は、第２ポート１３を弁室１０に開放して連通接続用凹部３Ｂによって第３ポート１４と第４ポート１５とを連通接続する第１の流路切換位置に位置する。
【００４０】
これに対し、電磁コイル７に通電が行われ、プランジャ５が上昇位置に位置すると、弁体３は、図２に示されているように、第４ポート１５を弁室１０に開放して連通接続用凹部３Ｂによって第２ポート１３と第３ポート１４とを連通接続する第２の流路切換位置に移動する。
【００４１】
この弁体３の第１の流路切換位置と第２の流路切換位置との間の移動は、弁体前面３Ａが弁座面１１に対してスライドするだけで、衝突を伴わないので、衝突音を生じることなく静かに行われる。
【００４２】
また、プランジャ５が降下位置と上昇位置に位置する時のプランジャ５のストッパ面との当接は、消音シート２８、２９によって行われるから、消音シート２８、２９による消音効果により、プランジャ衝突音の低減も図られ、優れた静音性が得られる。
【００４３】
図１２はこの発明による酸素採集器（医療用酸素濃縮器）の一つの実施の形態を示している。酸素採集器は、大気圧送を行うコンプレッサ５０と、ゼオライト等の窒素吸着剤を充填されて窒素吸着を行う再生可能な２つのシーブカラム（吸着筒Ａ、吸着筒Ｂ）５１、５２と、酸素を貯容するレシーバタンク５３と、レギュレータ５４と、鼻カニューラ５５を接続されるフィルタ５６と、四方弁５７と、二方弁（電磁開閉弁）５８と、３個の逆止弁５９、６０、６１を有している。
【００４４】
四方弁５７は、上述した直動スライド式電磁弁により構成されており、第１ポート（Ｃポート）１２をコンプレッサ５０の吐出サイドに、第４ポート（Ａポート）１５をシーブカラム（吸着筒Ａ）５１に、第２ポート（Ｂポート）１３をもう一つのシーブカラム（吸着筒Ｂ）５２に、第３ポート（Ｄポート）１４を窒素の大気パージを行う逆止弁（排気部）５９に各々接続されている。
【００４５】
シーブカラム５１、５２は各々逆止弁６０、６１を介してレシーバタンク５３の酸素取入側に接続され、レシーバタンク５３の酸素取出側にはレギュレータ５４、フィルタ５６が順に接続されている。また、シーブカラム５１と５２は二方弁５８によって相互に接続されている。
【００４６】
四方弁５７は、図１３（ａ）に示しているようなタイミングで、繰り返しオン・オフし、オン状態時には実線によって示されている流れが得られ、オフ状態時には破線によって示されている流れが得られる。これにより、吸着筒Ａと吸着筒Ｂとが、空気供給源であるコンプレッサ５０と排気部である逆止弁５９に対して窒素吸着の正流方向と吸着窒素パージの逆流方向とに交互に接続される。
【００４７】
二方弁５８は、図１３（ｂ）に示しているようなタイミングで、繰り返しオン・オフし、オン（弁開）状態時には吸着窒素パージ側の吸着筒に対してパージ圧を与える。これにより、吸着窒素のパージが促進される。
【００４８】
上述した酸素採集動作時には、四方弁５７は、１０秒程度のサイクル時間をもって頻繁にオン、オフを繰り返すが、四方弁５７を構成する上述の直動スライド式電磁弁の弁体３は、プランジャ５が回転しても、回転しないので、弁体前面３Ａが平行な状態で弁座面１１に均等に押し付けられた適正状態が保たれ、弁体前面３Ａが偏荷重状態で弁座面１１に押し付けられることがなく、長期間の使用でも、偏摩耗や弁漏れを生じることがない。
【００４９】
しかも、四方弁５７を構成する上述の直動スライド式電磁弁はスライド弁であるので、優れた静音性が得られる。更には、プランジャ５が降下位置と上昇位置に位置する時のプランジャ５のストッパ面との当接が消音シート２８、２９によって行われるから、この消音シートによる消音効果により、プランジャ衝突音の低減も図られ、優れた静音性が保たれる。
【００５０】
なお、この発明による直動スライド式電磁弁は、上述した四方弁に限られることはなく、３方弁等の他のスライド式流路切換弁やスライド式流量制御弁等、全てのスライド式弁で実施することが可能である。
【００５１】
【発明の効果】
以上の説明から理解される如く、この発明による直動スライド式電磁弁によれば、プランジャが回転しても、弁体がプランジャと共に回転（回動）することが確実に規制されるとともに、摩擦伝達によるその回転力が弁体に直接作用することがないので、弁体が弁体押さえばねによって弁座面に押し付けられて弁体の回転が弁座面により規制されていることと相まって、弁体前面が平行な状態で弁座面に均等に押し付けられた適正状態が保たれ、弁体前面が偏荷重状態で弁座面に押し付けられることがなく、長期間の使用でも、偏摩耗や弁漏れを生じることがない。
【図面の簡単な説明】
【図１】この発明による直動スライド式電磁弁を四方弁として実施した一つの実施の形態を示すオフ状態時の縦断面図である。
【図２】この発明による直動スライド式電磁弁を四方弁として実施した一つの実施の形態を示すオフ状態時の要部の縦断面図である。
【図３】この発明による直動スライド式電磁弁の弁体保持部の一つの実施の形態を示す分解斜視図である。
【図４】この発明による直動スライド式電磁弁の弁体、弁体押さえばね、弁座部材の組立手順１を示す正面図である。
【図５】この発明による直動スライド式電磁弁の弁体、弁体押さえばね、弁座部材の組立手順２を示す正面図である。
【図６】この発明による直動スライド式電磁弁の弁体、弁体押さえばね、弁座部材の組立手順３を示す正面図である。
【図７】（ａ）はこの発明による直動スライド式電磁弁の弁体、弁体押さえばね、弁座部材の組立手順４を示す正面図、（ｂ）は図７（ａ）の線Ａ−Ａ断面図である。
【図８】（ａ）はこの発明による直動スライド式電磁弁の弁体、弁体押さえばね、弁座部材の組立手順５を示す正面図、（ｂ）は図８（ａ）の線Ｂ−Ｂ断面図である。
【図９】この発明による直動スライド式電磁弁の取付リングのかしめ結合部を拡大して示す断面図である。
【図１０】この発明による直動スライド式電磁弁のプランジャチューブと取付リングとの溶接部を拡大して示す断面図である。
【図１１】この発明による直動スライド式電磁弁のプランジャチューブと吸引子との溶接部を拡大して示す断面図である。
【図１２】この発明による酸素採集器（医療用酸素濃縮器）の一つの実施の形態を示すブロック線図である。
【図１３】（ａ）はこの発明による酸素採集器の四方弁のオン・オフタイミングをタイムチャート、（ｂ）はこの発明による酸素採集器の二方弁のオン・オフタイミングをタイムチャートである。
【符号の説明】
１弁ハウジング
２弁座部材
３弁体
３Ａ前面
３Ｃ溝部
４プランジャチューブ
５プランジャ
６吸引子
７電磁コイル
８電磁ソレノイド装置
１０弁室
１１弁座面
１２第１ポート（Ｃポート）
１３第２ポート（Ｂポート）
１４第３ポート（Ｄポート）
１５第４ポート（Ａポート）
２８、２９消音シート
３０弁体保持軸部
３１、３２フランジ面
３３弁体押さえばね
３３Ａ，３３Ｂ半円状逃げ部
３３Ｃ，３３Ｄ端片
３３Ｅ，３３Ｆブリッジ辺部
３３Ｇ、３３Ｈばね作用部
３４圧縮コイルばね
５０コンプレッサ
５１シーブカラム（吸着筒Ａ）
５２シーブカラム（吸着筒Ｂ）
５３レシーバタンク
５４レギュレータ
５５鼻カニューラ
５６フィルタ
５７四方弁
５８二方弁
５９〜６１逆止弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a direct-acting slide solenoid valve and an oxygen collector, and more particularly to a direct-acting slide solenoid valve and an oxygen collector that perform flow path switching and flow rate control by directly driving a block-shaped valve element by an electromagnetic solenoid device. It is about.
[0002]
[Prior art]
The linear slide type solenoid valve is configured such that the planar front surface of the block-shaped valve body connected to the plunger of the electromagnetic solenoid device slides and slides in the axial direction with respect to the planar valve seat surface. Opening and closing the port that opens on the seating surface performs flow path switching and flow control.
[0003]
Conventionally, this type of direct-acting slide solenoid valve is mounted on a plate-like valve body holder fixed to the plunger of an electromagnetic solenoid device by a rivet or the like so that the valve body can move away from and in contact with the valve seat surface. The valve body is pressed against the valve seat surface from the back side by a leaf spring attached to the valve body holder (for example, Patent Documents 1, 2, and 3), and the valve chamber pressure is applied to the back side of the valve body. A device that presses a valve body against a valve seat surface (for example, Patent Document 4) is known.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 4-47493 [Patent Document 2]
Japanese Patent Publication No. 4-77840 [Patent Document 3]
Japanese Patent Publication No. 6-63577 [Patent Document 4]
Japanese Patent Laid-Open No. 2000-74248
[Problems to be solved by the invention]
In the electromagnetic solenoid device used in the direct-acting slide type solenoid valve, the plunger is not stopped, so that the plunger rotates around its central axis in the normal operation process, and this rotational force acts on the valve element. This is a force that rotates the valve body with respect to the valve seat surface in a state where the planar front surface of the valve body is in sliding contact with the planar valve seat surface in the conventional direct acting slide solenoid valve. The front surface of the body is pressed against the valve seat surface in an unbalanced state. For this reason, the parallelism between the valve body front surface and the valve seat surface is difficult to maintain, and uneven wear and valve leakage are likely to occur.
[0006]
In addition, the conventional direct-acting slide type electromagnetic valve has a problem that not only the number of parts is increased but also the number of assembling steps is increased, such as assembly of the valve element holder to the plunger and riveting of the leaf spring.
[0007]
The present invention has been made to solve the above-described problems, avoids the rotational force due to the rotation of the plunger from acting on the valve body, and does not cause uneven wear or valve leakage. Direct-acting slide solenoid valve that can reduce the number of points and assembly man-hours, and further improve the quietness unique to slide valves, home oxygen that is required to have excellent quietness and low operating noise A direct-acting slide solenoid valve suitable as a four-way valve used in an oxygen collector for medical oxygen concentrators used in therapy, etc., and an oxygen collector incorporating the direct-acting slide solenoid valve as a four-way valve It is intended to provide.
[0008]
[Means for Solving the Problems]
In order to achieve the above-described object, a linear motion slide type electromagnetic valve according to the present invention is connected to a plunger of an electromagnetic solenoid device, and is a block type valve biased toward a flat valve seat surface by a valve body pressing spring. in direct-acting slide solenoid valves planar front surface of the body to open and close a port that opens to the valve seat surface by sliding slide axially relative to the valve seat surface, the plunger, A valve body holding shaft portion having a circular cross section with flange surfaces at both axial ends, the valve body has a groove portion of a substantially semicircular cross section formed on the back side, and the valve body holding spring is A pair of bridge side portions in which a pair of end pieces formed with semicircular relief portions and the pair of end pieces are connected on both sides of the relief portions, and protrusion-like spring action portions are formed in the middle portion, respectively. And the valve body holding shaft portion between the flange surfaces The pair of blitch piece portions are positioned on both sides in a substantially diametrical direction, and the valve body holding spring is arranged between the flange surfaces so that the end pieces are elastically contacted with the flange surfaces. The valve body is sandwiched between the flange surfaces via the end pieces of the valve body holding spring fitted and mounted, and the movement in the axial direction is restricted, and the pair of bridge sides The spring action portion of the valve body abuts against the center portion on both sides of the groove portion of the valve body on a radial line perpendicular to the axial direction of the valve body and parallel to the valve seat surface, thereby causing the front surface of the valve body to The valve body is fitted and attached to the valve body holding shaft portion of the plunger so as to be pressed against the valve seat surface in a direction perpendicular to the valve seat surface .
[0009]
According to the linear slide type solenoid valve according to the present invention, a pair of end pieces formed with a semicircular relief portion and the pair of end pieces are connected on both sides of the relief portion, and a protrusion-shaped spring is provided at the intermediate portion. Adopting a valve body holding spring having a pair of bridge sides each formed with an action part, and the both sides in the diametrical direction of the valve body holding shaft part between the flange surfaces of the valve body holding shaft part of the plunger at both axial ends The valve body holding spring is positioned on the valve body holding shaft so that the pair of blitch pieces of the valve body holding spring are positioned between the flange faces and the end pieces of the valve body holding spring are elastically contacted with the flange face. When fitted and mounted, the valve body is sandwiched between the flange surfaces via the end pieces of the fitted and mounted valve body holding spring, and the axial movement is restrained, and the spring action of the middle part of the pair of bridge sides Is perpendicular to the axial direction of the valve body and parallel to the valve seat surface The valve body is fitted to the valve body holding shaft of the plunger so that the front surface of the valve body is pressed against the valve seat surface in a direction perpendicular to the valve seat surface by abutting with the center of both sides of the groove of the valve body on the direction line Since the valve body is mounted, the valve body is rotated to the valve body holding shaft section of the circular cross section of the plunger in a manner that does not hinder the rotation around the central axis of the valve body by the groove section of the substantially semicircular cross section formed on the back side. rotatably in and the valve holding have engaged to be movable in the axial direction together with the plunger through the end piece of the spring, that the valve body with even the plunger to flop plunger is rotated to rotate (pivot), In addition to being reliably regulated, the rotational force due to frictional transmission does not directly act on the valve body .
[0012]
In addition, a pair of bridge side portions in which a pair of end pieces formed with a semicircular relief portion and the pair of end pieces are connected on both sides of the relief portion, and a protrusion-like spring action portion is formed in the middle portion, respectively. The spring action part of the intermediate part of a pair of bridge sides is perpendicular to the axial direction of the valve body and is parallel to the valve seat surface on both sides of the groove part of the valve body. Since the front surface of the valve body is pressed against the valve seat surface in a direction perpendicular to the valve seat surface by abutting each of the central portions, even if the plunger rotates, the rotational force due to friction transmission directly acts on the valve body. Even if there is a difference in the force that abuts against the central part on both sides of the groove of the valve body due to the rotational force of the valve body pressing spring due to friction transmission, no force is generated to displace the valve body.
Normally, even if the relation of the valve body holding spring to the valve body changes with the change in the axial direction of the valve body holding shaft portion of the plunger, the spring action portions abut against the center portions on both sides of the groove portion of the valve body. Therefore, the front surface of the valve body is not pressed against the valve seat surface in an uneven load state .
[0013]
Further, the direct-acting slide type electromagnetic valve according to the present invention is in a valve chamber in which the valve body is formed in a valve housing, and the valve seat surface is a member forming a part of the wall surface of the valve chamber. The valve seat member is provided by a separate valve seat member, and the valve seat member can be incorporated into the valve housing by pushing the valve body holding shaft portion in the radial direction with the valve seat surface as the front surface.
[0014]
In this direct acting slide type solenoid valve, the valve seat member is pushed in the radial direction of the valve body holding shaft portion with the valve seat surface as the front surface. The valve body rotates around the central axis of the valve body holding shaft portion so as to be parallel to the seat surface, and the posture of the valve body is self-corrected.
[0015]
Further, in the linear motion slide type electromagnetic valve according to the present invention, the valve body is in a valve chamber formed in a valve housing, the valve seat surface forms a part of the wall surface of the valve chamber, One port is opened, three ports of the second port, the third port, and the fourth port are opened in the axial direction on the valve seat surface, and the valve body opens the second port to the valve chamber. A first flow path switching position for connecting the third port and the fourth port in communication with each other, and opening the fourth port to the valve chamber to connect the second port and the third port. A four-way valve is formed by moving in the axial direction between the second flow path switching position and the communication connection.
[0016]
In the linear motion slide solenoid valve according to the present invention, the first flow path switching position and the second flow path switching position are determined by the plunger abutting against a stopper surface on the fixed side, and the fixed side At least one of the stopper surface and the end surface of the plunger that comes into contact with the fixed stopper surface is made of a cushioning material, so that the impact noise of the stopper is reduced.
[0017]
In order to achieve the above-mentioned object, the oxygen collector according to the present invention has two reproducible adsorption cylinders for performing nitrogen adsorption, and the two adsorption cylinders are connected to the air supply source and the exhaust part with nitrogen. An oxygen collector that collects oxygen by alternately connecting a normal flow direction of adsorption and a reverse flow direction of adsorbed nitrogen purge, and the flow path switching between the two adsorption cylinders, the air supply source, and the exhaust section is described above. The direct-acting slide solenoid valve according to the present invention is used.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIGS. 1-11 has shown one Embodiment which implemented the direct acting slide type solenoid valve by this invention as a four-way valve.
[0019]
As shown in FIG. 1, the direct-acting slide type electromagnetic valve is an electromagnetic valve comprising a valve housing 1, a valve seat member 2, a valve body 3, a plunger tube 4, a plunger 5, an attractor 6 and an electromagnetic coil 7. And a solenoid device 8.
[0020]
The valve housing 1 and the valve seat member 2 are separate aluminum parts. The valve seat member 2 is hermetically fitted and inserted into a lateral hole portion 1A formed in the valve housing 1 by an O-ring 9, and the valve seat member 2 and the valve housing 1 inserted into the lateral hole portion 1A define the valve chamber 10. Defined.
[0021]
The push-in direction of the valve seat member 2 with respect to the lateral hole portion 1A, in other words, the extending direction of the lateral hole portion 1A is the radial direction (left-right direction) of a valve body holding shaft portion 30 described later of the plunger 5, The front surface of the seat member 2 in the pushing direction is a flat valve seat surface 11 that forms part of the wall surface of the valve chamber 10.
[0022]
A first port (C port) 12 opened to the valve chamber 10 is formed in the valve housing 1 as a pipe connection hole. On the valve seat surface 11 that forms a vertical plane, three ports of a second port (B port) 13, a third port (D port) 14, and a fourth port (A port) 15 are equally spaced from each other. And open in alignment with the axial direction (vertical direction). The three ports opened in the valve seat surface 11 are individually communicated with the pipe connection holes 19, 20, 21 by passages 16, 17, 18 formed in the valve seat member 2.
[0023]
The plunger tube 4 is made of stainless steel, and a stainless steel mounting ring 22 is non-flux welded to the outer periphery of the lower end portion, and the mounting ring 22 is fitted and inserted into a mounting hole 1B formed in the valve housing 1. It is fixed to the valve housing 1 by caulking 23 (see FIG. 9) at the opening edge of 1B. An airtight O-ring 24 is sandwiched between the fitting portion of the mounting ring 22 and the mounting hole 1B. In addition, the non-flux welding of the plunger tube 4 and the attachment ring 22 is performed by the welding part 25 of the lower end side of the plunger tube 4, as FIG. 10 shows.
[0024]
A suction element 6 is fixed to the upper end of the plunger tube 4 by non-flux welding. An electromagnetic coil 7 is fitted on the outer periphery of the plunger tube 4, and the electromagnetic coil 7 is fixed to the attractor 6 by a bolt 26. In addition, the non-flux welding of the plunger tube 4 and the attraction | suction child 6 is performed by the welding part 27 of the upper end side of the plunger tube 4, as FIG. 11 shows.
[0025]
The plunger 5 is provided in the plunger tube 4 so as to be movable in the axial direction. The portion of the plunger 5 facing the suction element 6 is a recess 5A into which the tip 6A of the suction element 6 can enter, and the length of the shaft between the plunger and the suction element that secures the required stroke by the depth of the recess 5A. Shortening has been attempted.
[0026]
A silencer sheet 28 made of a cushioning material made of rubber, resin or the like is laid on the bottom of the recess 5A, and the upper surface of the silencer sheet 28 is a stopper surface that comes into contact with the tip surface 6B of the suction element 6. A silencer sheet 29 made of a cushioning material made of rubber, resin, or the like is also laid on the bottom of the mounting hole 1B, and the upper surface of the silencer sheet 29 is another stopper surface that comes into contact with the stepped surface 5B of the plunger 5. .
[0027]
A compression coil spring 34 is sandwiched between the plunger 5 and the suction element 6. The compression coil spring 34 urges the plunger 5 downward.
[0028]
As shown in FIG. 1, when the plunger 5 is in an off state where the electromagnetic coil 7 is not energized, the stepped surface 5 B comes into contact with the sound deadening sheet 29 in the mounting hole 1 B by the spring force of the compression coil spring 34. When the electromagnetic coil 7 is energized at the lowered position, the sound deadening sheet 28 of the recess 5A at the bottom of the recess 5A that has moved up against the spring force of the compression coil spring 34 is It is located at the raised position where it comes into contact with the tip surface 6B.
[0029]
The lower end side of the plunger 5 (below the step surface 5B) is in the valve chamber 10 through the communication hole 1C formed in the valve housing 1. A lower end portion of the plunger 5 located in the valve chamber 10 is a valve body holding shaft portion 30 having a circular cross section. The valve body holding shaft portion 30 has flange surfaces 31 and 32 at both axial ends.
[0030]
The valve body 3 is a plastic molded product and has a block shape. The valve body 3 has a communication connection recess 3B on a flat front surface 3A facing the valve seat surface 11, and a groove portion 3C having a substantially semicircular cross section on the back surface side. (See FIG. 3). The valve body 3 is engaged with the valve body holding shaft portion 30 of the plunger 5 by the groove portion 3C so as to be rotatable around the central axis, and is sandwiched between the flange surfaces 31 and 32 to be restrained from moving in the axial direction. Due to the restriction of the movement in the axial direction, the valve body 3 moves in the axial direction together with the plunger 5 while being directly connected to the plunger 5.
[0031]
Between the valve body 3 and the valve body holding shaft portion 30, a valve body pressing spring 33 that biases the valve body 3 toward the valve seat surface 11 is provided. As shown well in FIG. 3, the valve body pressing spring 33 is sandwiched between the flange surfaces 31, 32 by end pieces 33C, 33D at both ends in the axial direction having semicircular relief portions 33A, 33B. It is configured by a plate spring having a U-shaped skeleton shape that is fitted and mounted to the valve body holding shaft portion 30 in a manner that does not hinder the rotation of the body 3 around the central axis.
[0032]
The valve body pressing spring 33 has a pair of blitch piece portions 33E and 33F that connect the end pieces 33C and 33D and are located on both sides of the valve body holding shaft portion 30 in the substantially diametrical direction between the flange surfaces 31 and 32. Protruding spring action portions 33G and 33H are formed at intermediate portions of the respective blitch piece portions 33E and 33F. The valve body pressing spring 33 urges the valve body 3 toward the valve seat surface 11 by the spring acting portions 33G and 33H coming into contact with both side portions 3D and 3E of the back surface side groove 3C of the valve body 3, respectively. ing.
[0033]
Next, an assembly procedure of the valve body 3, the valve body pressing spring 33, and the valve seat member 2 will be described with reference to FIGS.
As shown in FIG. 4, the dimension A between the flange surfaces of the valve body holding shaft 30, the dimension Bf between the tips of the end pieces 33 C and 33 D of the valve body pressing spring 33 in the free state, and the dimension C between the root ends , C <A <Bf. The valve body holding spring 33 is assembled before the valve seat member 2 is assembled into the valve housing 1, with the side hole portion 1A serving as an access hole, as shown in FIG. 5, at the root end side of the end pieces 33C and 33D. The valve body pressing spring 33 is inserted between the flange surfaces 31 and 32 of the valve body holding shaft portion 30 already incorporated in the valve chamber 10 while further deforming the end pieces 33C and 33D inward.
[0034]
Finally, as shown in FIG. 6, the process is performed until the back portions of the semicircular relief portions 33 A and 33 B (see FIG. 3) of the end pieces 33 C and 33 D contact the outer peripheral surface of the valve body holding shaft portion 30. . In this state, the valve body holding shaft portion 30 is fixed to the valve body holding shaft portion 30 so as to be rotatable and displaceable around the central axis line by tension due to deformation of the end pieces 33C and 33D.
[0035]
In this mounted state, as shown in FIG. 6, the end-to-tip dimension Bs of the end pieces 33C and 33D of the valve body pressing spring 33 and the axial direction dimension D of the valve body 3 are Bs ≧ D. The valve body 3 is inserted between 33C and 33D. As shown in FIGS. 7 (a) and 7 (b), the insertion is such that the central portions of both side portions 3D and 3E of the back surface side groove 3C of the valve body 3 are orthogonal to the axial direction of the valve body 3 and This is performed until the spring action portions 33G and 33H of the valve body pressing spring 33 come into contact with each other on a radial line parallel to the valve seat surface .
[0036]
After the assembly of the valve body 3 and the valve body pressing spring 33 is completed, the valve seat member 2 is inserted into the lateral hole portion 1A with the valve seat surface 11 as the front surface. This insertion is performed by pushing the valve body holding shaft portion 30 in the radial direction, and the valve seat surface 11 comes into contact with the front surface 3 A of the valve body 3. When the valve seat member 2 is inserted to the proper position, the front surface 3A of the valve body 3 is pushed by the valve seat surface 11, and as shown in FIGS. 8 (a) and 8 (b), the valve body front surface 3A. The valve body 3 rotates around the central axis of the valve body holding shaft portion 30 so that is parallel to the valve seat surface 11, and the posture of the valve body 3 is self-corrected. At this time, the spring acting portions 33G and 33H are respectively bent and contact the central portions of both side portions 3D and 3E of the back side groove portion 3C on a radial line perpendicular to the axial direction of the valve body 3 and parallel to the valve seat surface 11. The front surface 3A of the valve body 3 is pressed against the valve seat surface 11 evenly in the direction perpendicular to the valve seat surface 11 from both sides, and an appropriate valve cutoff seal pressure is obtained.
[0037]
As described above, the valve body 3 is rotatably engaged with the valve body holding shaft portion 30 of the circular cross section of the plunger 5 by the groove portion 3C having a substantially semicircular cross section formed on the back surface side. Since the spring 33 is pressed against the valve seat surface 11, even if the plunger 5 rotates, the rotational force does not act on the valve body 3, and the valve body 3 rotates (turns) together with the plunger 5. There is no.
[0038]
Therefore, even if the plunger 5 rotates, the proper state in which the valve body front surface 3A is evenly pressed against the valve seat surface 11 while the valve body front surface 3A is in parallel is maintained, and the valve body front surface 3A is pressed against the valve seat surface 11 in an unbalanced state. Even when used for a long period of time, uneven wear and valve leakage do not occur.
[0039]
Next, flow path switching of a direct acting slide type electromagnetic valve as a four-way valve will be described.
When the electromagnetic coil 7 is not energized and the plunger 5 is in the lowered position as shown in FIG. 1, the valve body 3 connects the second port 13 to the valve chamber 10. It is opened and located at the first flow path switching position where the third port 14 and the fourth port 15 are connected in communication by the communication connection recess 3B.
[0040]
On the other hand, when the electromagnetic coil 7 is energized and the plunger 5 is in the raised position, the valve body 3 opens the fourth port 15 to the valve chamber 10 and communicates as shown in FIG. It moves to the 2nd flow-path switching position which connects the 2nd port 13 and the 3rd port 14 by the recessed part 3B for a connection.
[0041]
Since the movement between the first flow path switching position and the second flow path switching position of the valve body 3 is merely a slide of the valve body front surface 3A with respect to the valve seat surface 11, no collision occurs. It is performed silently without causing a collision sound.
[0042]
Further, when the plunger 5 is located at the lowered position and the raised position, the contact with the stopper surface of the plunger 5 is performed by the sound deadening sheets 28, 29. Reduction is also achieved, and excellent silence is obtained.
[0043]
FIG. 12 shows one embodiment of an oxygen collector (medical oxygen concentrator) according to the present invention. The oxygen collector is composed of a compressor 50 that feeds atmospheric pressure, two reproducible sieve columns (adsorption cylinder A, adsorption cylinder B) 51 and 52 that are filled with a nitrogen adsorbent such as zeolite and perform nitrogen adsorption, and oxygen. A receiver tank 53 for storing, a regulator 54, a filter 56 to which a nasal cannula 55 is connected, a four-way valve 57, a two-way valve (electromagnetic on-off valve) 58, and three check valves 59, 60, 61 Have.
[0044]
The four-way valve 57 is configured by the above-described direct-acting slide type electromagnetic valve. The first port (C port) 12 is on the discharge side of the compressor 50, and the fourth port (A port) 15 is a sheave column (adsorption cylinder A). 51, the second port (B port) 13 is connected to another sheave column (adsorption cylinder B) 52, and the third port (D port) 14 is connected to a check valve (exhaust part) 59 that performs an atmospheric purge of nitrogen. Has been.
[0045]
The sieve columns 51 and 52 are connected to the oxygen intake side of the receiver tank 53 via check valves 60 and 61, respectively, and a regulator 54 and a filter 56 are connected to the oxygen extract side of the receiver tank 53 in this order. The sheave columns 51 and 52 are connected to each other by a two-way valve 58.
[0046]
The four-way valve 57 is repeatedly turned on and off at the timing shown in FIG. 13A, and a flow indicated by a solid line is obtained in the on state, and a flow indicated by a broken line is obtained in the off state. can get. As a result, the adsorption cylinder A and the adsorption cylinder B are alternately connected to the compressor 50 as an air supply source and the check valve 59 as an exhaust portion in the normal flow direction of nitrogen adsorption and the reverse flow direction of adsorption nitrogen purge. Is done.
[0047]
The two-way valve 58 is repeatedly turned on and off at the timing shown in FIG. 13B, and applies a purge pressure to the adsorption cylinder on the adsorption nitrogen purge side in the on (valve open) state. Thereby, the purge of adsorbed nitrogen is promoted.
[0048]
During the oxygen collecting operation described above, the four-way valve 57 is frequently turned on and off repeatedly with a cycle time of about 10 seconds. However, the valve element 3 of the direct-acting slide electromagnetic valve constituting the four-way valve 57 is the plunger 5. Since the valve body front surface 3A is parallel and pressed against the valve seat surface 11 in an appropriate state, the valve body front surface 3A is pressed against the valve seat surface 11 in an unbalanced state. Even when used for a long period of time, uneven wear and valve leakage do not occur.
[0049]
In addition, since the above-described direct acting slide type electromagnetic valve constituting the four-way valve 57 is a slide valve, excellent quietness can be obtained. Furthermore, since the silencer sheets 28 and 29 make contact with the stopper surface of the plunger 5 when the plunger 5 is located at the lowered position and the raised position, the silencer effect by the silencer sheet also reduces the plunger collision sound. And excellent quietness is maintained.
[0050]
The direct-acting slide solenoid valve according to the present invention is not limited to the above-described four-way valve, and all slide-type valves such as other slide-type flow path switching valves such as three-way valves and slide-type flow control valves Can be implemented.
[0051]
【The invention's effect】
As understood from the above description, according to the direct acting slide electromagnetic valve according to the present invention, even if the plunger rotates, the valve body is reliably restricted from rotating (turning) together with the plunger , and the friction is Since the rotational force due to the transmission does not directly act on the valve body , the valve body is pressed against the valve seat surface by the valve body presser spring, and the rotation of the valve body is restricted by the valve seat surface. Even if the front of the valve body is parallel and pressed against the valve seat surface, the proper state is maintained, and the front surface of the valve body is not pressed against the valve seat surface under an unbalanced load. There is no leakage.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view in an off state showing one embodiment in which a direct-acting slide electromagnetic valve according to the present invention is implemented as a four-way valve.
FIG. 2 is a longitudinal sectional view of a main part in an off state showing one embodiment in which the direct acting slide type electromagnetic valve according to the present invention is implemented as a four-way valve.
FIG. 3 is an exploded perspective view showing one embodiment of a valve body holding portion of a direct acting slide type electromagnetic valve according to the present invention.
FIG. 4 is a front view showing an assembling procedure 1 of the valve body, the valve body pressing spring, and the valve seat member of the direct acting slide electromagnetic valve according to the present invention.
FIG. 5 is a front view showing a procedure 2 for assembling the valve body, the valve body pressing spring, and the valve seat member of the linear slide type solenoid valve according to the present invention;
FIG. 6 is a front view showing an assembling procedure 3 of the valve body, the valve body pressing spring, and the valve seat member of the direct acting slide electromagnetic valve according to the present invention.
7A is a front view showing an assembling procedure 4 of the valve body, the valve body pressing spring, and the valve seat member of the direct acting slide type electromagnetic valve according to the present invention, and FIG. 7B is a line A of FIG. 7A. It is -A sectional drawing.
8A is a front view showing an assembling procedure 5 of a valve body, a valve body pressing spring, and a valve seat member of a direct acting slide electromagnetic valve according to the present invention, and FIG. 8B is a line B in FIG. 8A. It is -B sectional drawing.
FIG. 9 is an enlarged cross-sectional view showing a caulking coupling portion of the mounting ring of the direct acting slide type solenoid valve according to the present invention.
FIG. 10 is an enlarged cross-sectional view showing a welded portion between a plunger tube and a mounting ring of a direct acting slide solenoid valve according to the present invention.
FIG. 11 is an enlarged cross-sectional view showing a welded portion between a plunger tube and a suction element of a direct acting slide electromagnetic valve according to the present invention.
FIG. 12 is a block diagram showing one embodiment of an oxygen collector (medical oxygen concentrator) according to the present invention.
FIG. 13A is a time chart showing the ON / OFF timing of the four-way valve of the oxygen collector according to the present invention, and FIG. 13B is a time chart showing the ON / OFF timing of the two-way valve of the oxygen collector according to the present invention. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valve housing 2 Valve seat member 3 Valve body 3A Front surface 3C Groove part 4 Plunger tube 5 Plunger 6 Attractor 7 Electromagnetic coil 8 Electromagnetic solenoid device 10 Valve chamber 11 Valve seat surface 12 1st port (C port)
13 Second port (B port)
14 3rd port (D port)
15 4th port (A port)
28, 29 Silencer sheet 30 Valve element holding shaft 31, 32 Flange surface 33 Valve element holding spring
33A, 33B Semicircular relief
33C, 33D end piece
33E, 33F Bridge side parts 33G, 33H Spring action part 34 Compression coil spring 50 Compressor 51 Sheave column (Suction cylinder A)
52 Sieve column (Suction cylinder B)
53 Receiver tank 54 Regulator 55 Nasal cannula 56 Filter 57 Four-way valve 58 Two-way valve 59-61 Check valve

Claims

Is connected to a plunger of the electromagnetic solenoid device, the valve holding planar axially sliding the sliding plane of the front face of the urging block-shaped valve element in the valve seat surface side with respect to the valve seat surface by a spring In a direct-acting slide solenoid valve that opens and closes a port opened in the valve seat surface by moving,
The plunger has a valve body holding shaft portion having a circular cross section with flange surfaces on both axial ends.
The valve body has a groove part of a substantially semicircular cross section formed on the back side,
The valve body pressing spring connects a pair of end pieces formed with a semicircular relief portion and the pair of end pieces on both sides of the relief portion, and a projecting spring action portion is formed at an intermediate portion, respectively. A pair of bridge sides,
Between the flange surfaces, the pair of blitch pieces are positioned on both sides of the valve body holding shaft portion in a substantially diametrical direction, and the end pieces are elastically contacted between the flange surfaces by being sandwiched between the flange surfaces. The valve body holding spring is fitted and mounted on the valve body holding shaft, and the valve body is sandwiched between the flange surfaces via the end pieces of the fitted and mounted valve body holding spring. Restrained direction movement,
The spring action portions of the pair of bridge side portions are in contact with the center portions on both sides of the groove portion of the valve body on a radial line perpendicular to the axial direction of the valve body and parallel to the valve seat surface, respectively. A linear motion slide type characterized in that the valve body is fitted and mounted on the valve body holding shaft portion of the plunger so that the front surface of the valve body is pressed against the valve seat surface in a direction perpendicular to the valve seat surface. solenoid valve.

The valve body is in a valve chamber formed in a valve housing, and the valve seat surface is provided as a member forming a part of a wall surface of the valve chamber by a valve seat member separate from the valve housing. member according to claim 1 Symbol mounting linear slides solenoid valve incorporated in the valve housing by the radial push of the valve body holding the shaft portion of the valve seat surface as the front surface.

The valve body is in a valve chamber formed in a valve housing, the valve seat surface forms a part of a wall surface of the valve chamber, a first port opens in the valve chamber, and a second port in the valve seat surface. The three ports of the port, the third port, and the fourth port are aligned and opened in the axial direction, and the valve body opens the second port to the valve chamber and opens the third port and the fourth port. Between the first flow path switching position where the second port is open to the valve chamber and the second port is communicated with the third port. axially moving, linear slide-type solenoid valve according to claim 1 or 2 Symbol placement forms a four-way valve.

The first flow path switching position and the second flow path switching position are determined by the plunger abutting against a fixed stopper surface, and contact the fixed stopper surface and the fixed stopper surface. at least one of the end face of the plunger in contact with the linear motion slide-type solenoid valve according to claim 3 Symbol mounting is constituted by a cushioning material.

It has two reproducible adsorption cylinders that perform nitrogen adsorption, and these two adsorption cylinders are alternately connected to the air supply source and the exhaust section in the nitrogen adsorption forward flow direction and the adsorption nitrogen purge backward flow direction. 5. An oxygen collector that performs oxygen collection, wherein the flow path switching between the two adsorption cylinders, the air supply source, and the exhaust section is performed by a direct-acting slide electromagnetic valve according to claim 3 or 4 .