JP3911588B2 - Drain trap with intake valve - Google Patents
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- JP3911588B2 JP3911588B2 JP2002002313A JP2002002313A JP3911588B2 JP 3911588 B2 JP3911588 B2 JP 3911588B2 JP 2002002313 A JP2002002313 A JP 2002002313A JP 2002002313 A JP2002002313 A JP 2002002313A JP 3911588 B2 JP3911588 B2 JP 3911588B2
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Description
【0001】
【発明の属する技術分野】
本発明は、例えば洗濯機等からの排水を流す床排水口に設置して、トラップ封水を形成する排水トラップに関する。
【0002】
【従来の技術】
この種の排水トラップとしては、床排水口に接続された器具排水管の上端部に挿入されかつ周壁に排水溢出孔があけられた有底外筒と、有底外筒の上端開口を覆いかつ中心部に貫通孔があけられた蓋と、蓋の貫通孔に下向きに接続された内筒と、蓋の貫通孔に上向きに接続された排水ホース接続口とを備えたものが知られている。
【0003】
上記の排水トラップにあっては、洗濯機等からの排水が、排水ホースを介してホース接続口から内筒に流入し、内筒の下端と有底外筒の底壁との間の下側空隙部、ならびに内筒および有底外筒の周壁どうしの間の内側環状空隙部を経て、排水溢出孔から、有底外筒の周壁と排水管の上端部内周面との間の外側環状空隙部を含む器具排水管内に流下する。器具排水管内を流れた排水は、さらに、排水横枝管、排水立て管、排水横主管を経て、下水道に流れ込むのが通常である。そして、洗濯機等からの排水の流入が終わると、有底外筒および内筒の内部に排水溢出孔よりも低い水位で排水が溜まり、それによって封水が形成される。この封水により、排水管内の臭気や害虫が床上方空間に漏れ出すのが防止されるようになっている。
【0004】
ところで、例えば集合住宅等の排水システムにおいては、下の階の排水横枝管内を排水が満水状態で流れることによって、器具排水管内が負圧状態となり、それによって排水トラップ内の封水が排水管側へ誘引され、封水が破壊される現象、即ち、誘導サイホン作用の問題がある。そこで、従来は、排水立て管の上端部に、排水管内が負圧状態になった時に外気を導入する吸気弁を設けて、排水トラップの封水の破壊が防止されるようになっていた。
【0005】
【発明が解決しようとする課題】
しかし、1本の排水横枝管に複数本の器具排水管が接続されている場合には、排水横枝管の上流側に接続された器具排水管からの排水に伴って、排水横枝管の下流側に接続された器具排水管の内部が負圧状態となることもある。この場合、排水立て管上端部の吸気弁は十分に機能せず、排水トラップの封水が破壊されてしまうことになる。したがって、床排水口に設置される上記の排水トラップにおいても、同様の誘導サイホン作用によって排水管内が負圧状態になると、排水トラップ内に溜まった排水が排水管側に誘引されて、封水が破壊されるおそれがある。
【0006】
また、洗濯機等からの排水が排水トラップを経て排水管内に流下する間は、外側環状空隙部が負圧状態となっている。このように外側環状空隙部が負圧状態になっていると、気圧差によって排水トラップ内の排水が排水管側に吸引されるが、排水が排水トラップ内を満水状態で流れている時には、特に問題はない。ところが、排水の流入量が次第に少なくなって、排水と一緒に空気が排水トラップ内に導入されるようになると、前記吸引作用によって空気が排水に混入される。そうすると、ゴボゴボという不快な音が発生する上、排水の流れも悪くなる。
【0007】
本発明の目的は、床排水口に設置される排水トラップにおいて、誘導サイホン作用によって封水が破壊されるおそれがなく、排水時に不快音が発生せず、排水の流れが良くなるようにすることにある。
【0008】
【課題を解決するための手段および発明の効果】
上記の目的は、本発明による吸気弁付き排水トラップによって達成することができる。
【0009】
即ち、本発明による第1の吸気弁付き排水トラップは、床排水口に接続された排水管の上端部に挿入される有底外筒と、有底外筒の上端開口を覆いかつ中心部に貫通孔があけられた蓋と、貫通孔に通じるように蓋に下向きに接続された内筒と、貫通孔に通じるように蓋に上向きに接続された排水ホース接続口とを備えているものである。内筒は、有底外筒の底壁上面との間に下側空隙部が生じるような長さを有するとともに、有底外筒の周壁内周面との間に内側環状空隙部が生じるような外径を有している。有底外筒の周壁は、その上端部が、排水管の上端部内周面に接合し得るような外径を有する大径部となされるとともに、上端部よりも下側の部分が、排水管の上端部内周面との間に外側環状空隙部が生じるような外径を有する小径部となされ、小径部の上部に、排水溢出孔と、排水溢出孔よりも上方に位置する通気孔とがあけられている。そして、蓋に、内側環状空隙部と床上方空間とを連通させる吸気孔が形成されているとともに、排水管内が負圧状態になった時に吸気孔を開いて内側環状空隙部および通気孔を通じて排水管内に外気を導入し、排水管内の負圧状態が解消されると吸気孔を閉じる吸気弁が設けられている。
【0010】
上記の吸気弁付き排水トラップにあっては、排水管内が負圧状態になると、吸気弁が吸気孔を開き、内側環状空隙部および通気孔を通じて、外側環状空隙部を含む排水管の内部に外気が導入される。ここで、排水管内が負圧状態になる場合とは、解決課題の項の記載から明らかなように2つある。1つは、他の排水管内を排水が満水状態で流れて誘導サイホン作用が生じた場合である。この場合、外側環状空隙部を含む排水管内全体が負圧状態となるが、上記のように排水トラップ自体に備えられた吸気弁によって排水管内に外気が導入されることにより負圧状態が解消されるので、排水が満水状態で流れる他の排水管の位置にかかわらず、封水の破壊が確実に防止される。また、もう1つは、排水が排水トラップを経て排水管内に流下する場合である。この場合、外側環状空隙部が部分的に負圧状態となるが、上記のように吸気弁によって外側環状空隙部に外気が導入されることにより負圧状態が解消されるので、排水が終わりに近づいても排水に空気が混入して不快な音が出たり、排水の流れが悪くなるおそれがない。
【0011】
本発明による第1の吸気弁付き排水トラップにおいて、内側環状空隙部が、水平環状仕切によって、排水溢出孔に通じる排水流通部分と、通気孔に通じる外気流通部分とに区画されているのが好ましい。
【0012】
内側環状空隙部が上記のような仕切によって排水流通部分と外気流通部分とに区画されていれば、内側環状空隙部を通じて排水が吸気弁に逆流するのが防止される上、吸気弁から排水管内への外気の導入も確実に行われる。ここで、水平環状仕切は、有底外筒および内筒とは別体に形成された水平環状仕切部材によって構成されていてもよいし、有底外筒および内筒の周壁のうち少なくとも一方にこれらと一体に形成された水平環状仕切部によって構成されていてもよい。
【0013】
また、本発明による第1の吸気弁付き排水トラップにおいて、上記仕切に加えて、小径部の外周面における排水溢出孔と通気孔との間の部分に、吸気弁への排水の逆流を阻止する逆止弁が設けられているのが、より好ましい。
【0014】
上記のような逆止弁があれば、吸気弁への排水の逆流をより確実に防止することができる。この逆止弁は、例えば、ゴム等の弾性材料により形成され、外周縁部が排水管の上端部内周面に接するように小径部外周面の前記部分に取り付けられたスカート状のものとすることができる。なお、排水の流量が多くて流れの勢いが強い状態の時には、上記逆止弁は排水の流れの圧力により閉じられていて、吸気弁は作動しない。そして、排水が終わりに近づいて、排水の流れの勢いが弱くなってくると、上記逆止弁が開いて、吸気弁が作動し、外側環状空隙部における逆止弁よりも下側部分に外気が導入され、該部分の負圧状態が解消される。したがって、負圧吸引作用により排水に空気が混入して不快な音が発生したり、排水の流れが悪くなるといった不具合がより生じ難くなる。
【0015】
次に、本発明による第2の吸気弁付き排水トラップは、床排水口に接続された排水管の上端部に挿入される有底外筒と、有底外筒の上端開口を覆いかつ中心部に貫通孔があけられた蓋と、貫通孔に通じるように蓋に下向きに接続された内筒と、貫通孔に通じるように蓋に上向きに接続された排水ホース接続口とを備え、内筒は、有底外筒の底壁上面との間に下側空隙部が生じるような長さを有するとともに、有底外筒の周壁内周面との間に内側環状空隙部が生じるような外径を有しており、有底外筒の周壁は、その上端部が、排水管の上端部内周面に接合し得るような外径を有する大径部となされるとともに、上端部よりも下側の部分が、排水管の上端部内周面との間に外側環状空隙部が生じるような外径を有する小径部となされ、小径部の上部に、通気兼排水溢出孔があけられており、蓋に、内側環状空隙部と床上方空間とを連通させる吸気孔が形成されているとともに、排水管内が負圧状態になった時に吸気孔を開いて内側環状空隙部および通気兼排水溢出孔を通じて排水管内に外気を導入し、排水管内の負圧状態が解消されると吸気孔を閉じる吸気弁が設けられているものである。
【0016】
この第2の吸気弁付き排水トラップによっても、上述した第1の吸気弁付き排水トラップとほぼ同様の作用効果が奏される。なお、通気兼排水溢出孔は、その機能を確実に発揮しうるように、第1の吸気弁付き排水トラップの排水溢出孔と比べて、上方に拡大したものとしておくことが好ましい。
【0017】
本発明による第1および第2の吸気弁付き排水トラップにおいて、吸気弁が、蓋の内部に形成され、底壁の外側部分に床上方空間に通じるように前記吸気孔があけられ、かつ底壁の内側部分に内方空隙部に通じるように連通孔があけられている環状弁室と、弁室に昇降可能に配されかつ吸気孔を塞ぎ得る大きさを有する環状弁体とを備えており、排水管内が負圧状態になると、排水管内に連通した弁室と床上方空間との気圧差により弁体が弁室の底壁から浮上して、吸気孔から外気が導入され、排水管内の負圧状態が解消されると、自重により弁体が弁室の底壁まで降下して、吸気孔が塞がれるようになっている場合がある。
【0018】
吸気弁の構成を上記のようなものとすれば、構造が簡単で、容易に製造することができる。しかも、排水管内と床上方空間との気圧差によって自動的にかつ確実に弁の開閉操作が行われ、床上方空間への臭気漏れや排水の逆流の心配もない。
【0019】
吸気弁を上記の構成とする場合において、弁体の内周縁に、弁室の内周壁に当接して弁体の昇降を案内する複数の内方凸部が、周方向に間隔をおいて設けられているのがより好ましい。
【0020】
弁体に上記のような内方凸部が設けられていれば、弁体の昇降による吸気孔の閉塞および開放が確実に行われる。
【0021】
本発明による第1および第2の吸気弁付き排水トラップにおいて、内筒が軟質樹脂によって排水ホース接続口と一体に形成されている場合がある。
【0022】
上記の場合、内筒と排水ホース接続口とが一体化されているため、それだけ部品点数が少なくなる。しかも、蓋への接続に際しては、これらの一体物を蓋の貫通孔に挿通させるだけで済む上、該一体物を軟質樹脂製としたので、該一体物の挿通部分が貫通孔の内周面に密着し、特別なシール部材が不要となる。軟質樹脂としては、例えば、エラストマー、軟質塩化ビニル樹脂等が挙げられる。
【0023】
本発明による第1および第2の吸気弁付き排水トラップにおいて、内筒が硬質樹脂によって蓋と一体に形成され、排水ホース接続口が軟質樹脂によって形成されている場合もある。
【0024】
上記の場合、内筒と蓋とが硬質樹脂により一体に形成されているため、それだけ部品点数が少なくなる上、内筒を蓋に接続する手間が省ける。また、排水ホース接続口を軟質樹脂製としたので、これの下端部を蓋の貫通孔に差し込んで接続することにより、該下端部が貫通孔の内周面に密着し、特別なシール部材が不要となる。硬質樹脂としては、例えばABS樹脂が挙げられる。
【0025】
また、本発明による第1および第2の吸気弁付き排水トラップにおいて、内筒および排水ホース接続口がそれぞれ軟質樹脂によって別体に形成されている場合もある。
【0026】
上記の場合、例えば、軟質樹脂製の内筒の上端部を蓋の貫通孔に差し込んで接続することにより、該下端部が貫通孔の内周面に密着し、さらに、軟質樹脂製の排水ホース接続口の下端部を前記内筒の上端部に差し込んで接続することにより、該下端部が内筒の上端部内周面に密着するので、特別なシール部材が不要となる。
【0027】
本発明による第1および第2の吸気弁付き排水トラップにおいて、有底外筒が、内径が異なる2種類の排水管のうち内径が小さい方の排水管の上端部内周面に接合し得るような外径を有する大径部を周壁上端部に備えた有底外筒本体と、前記2種類の排水管のうち内径が大きい方の排水管の上端部内周面に接合し得るような外径を有しかつ有底外筒本体の大径部に任意に嵌め被せられて接合される環状アダプタとを備えており、内径が小さい方の排水管の上端部に挿入される場合には、有底外筒本体のみで構成され、内径が大きい方の排水管の上端部に挿入される場合には、有底外筒本体とアダプタとで構成されるようになっている場合がある。
【0028】
上記の場合、排水管が例えばVU管(内径の大きい管)およびVP管(内径の小さい管)のうちいずれの管で構成されている時でも、アダプタの使用の有無のみで、容易に対応させることができ、便利である。
【0029】
【発明の実施の形態】
図1〜3には、本発明の第1の実施形態が示されている。これらの図において、本発明による吸気弁(6)付き排水トラップ(11)は、床排水口(D)に接続された排水管(P)の上端部に挿入される有底外筒(2)と、有底外筒(2)の上端開口を覆いかつ中心部に貫通孔(30)があけられた蓋(3)と、貫通孔(30)に通じるように蓋(3)に下向きに接続された内筒(4)と、貫通孔(30)に通じるように蓋(3)に上向きに接続された排水ホース接続口(5)とを備えている。内筒(4)は、有底外筒(2)の底壁(21)上面との間に下側空隙(S1)が生じるような長さを有するとともに、有底外筒(2)の周壁(22)内周面との間に内側環状空隙部(S2)が生じるような外径を有している。有底外筒(2)の周壁(22)は、その上端部が、排水管(P)の上端部内周面に接合し得るような外径を有する大径部(221)となされるとともに、上端部よりも下側の部分が、排水管(P)の上端部内周面との間に外側環状空隙部(S3)が生じるような外径を有する小径部(222)となされ、小径部(222)の上部に、排水溢出孔(23)と、排水溢出孔(23)よりも上方に位置する通気孔(24)とがあけられている。そして、蓋(3)に、内側環状空隙部 (S2) と床上方空間 (S) とを連通させる吸気孔 (62) が形成されているとともに、排水管(P)内が負圧状態になった時に吸気孔 (62) を開いて内側環状空隙部(S2)および通気孔(24)を通じて排水管(P)内に外気(A)を導入し、排水管 (P) 内の負圧状態が解消されると吸気孔 (62) を閉じる吸気弁(6)が設けられている。
【0030】
有底外筒(2)は、内径が異なる2種類の排水管、即ち、VU管よりなる内径が大きい排水管(P)およびVP管よりなる内径が小さい排水管(図示略)のうち内径が小さい排水管の上端部内周面に接合し得るような外径を有する大径部(221A)を周壁(22)上端部に備えた有底外筒本体(2A)と、前記2種類の排水管のうち内径が大きい排水管(P)の上端部内周面に接合し得るような外径を有しかつ有底外筒本体(2A)の大径部(221A)に任意に嵌め被せられて接合される環状アダプタ(2B)とを備えている。そして、内径が小さい排水管の上端部に挿入される場合には、有底外筒本体(2A)のみで構成され、内径が大きい排水管(P)の上端部に挿入される場合には、有底外筒本体(2A)とアダプタ(2B)とで構成されるようになっている。よって、後者の場合、有底外筒(2)の周壁(22)の大径部(221)は、有底外筒本体(2A)の大径部(221A)とアダプタ(2B)とで構成されることになる。図1および2では、VU管よりなる内径が大きい排水管(P)に有底外筒(2)を挿入した状態が図示されている。有底外筒本体(2A)およびアダプタ(2B)は、例えばABS樹脂等の硬質樹脂により形成される。有底外筒本体(2A)とアダプタ(2B)との接合、および、有底外筒本体(2A)またはアダプタ(2B)と排水管(P)上端部内周面との接合は、例えば接着剤を用いて行われる。
【0031】
有底外筒(2)の上端部には、環状外向きフランジ(25)が一体に形成されている。そして、このフランジ(25)が、床排水口(D)の周縁部に載置された水平環板状の床排水口カバー(7)の上面内周縁部に係合させられている。床排水口カバー(7)の内周縁寄りには、立上り壁(71)が一体に形成されている。立上り壁(71)の内周面には、雌ねじ部(711)が形成されている。
【0032】
排水溢出孔(23)は、全部で数個あって、それぞれが大きい横長方形状をしており、小径部(222)の上端寄りに周方向に間隔をおいて配されている。通気孔(24)も、全部で複数個あって、それぞれが小さい横長方形状をしており、小径部(222)の上端部に周方向に間隔をおいて配されている。
【0033】
内筒(4)は、エラストマー等の軟質樹脂によって、排水ホース接続口(5)と一体に形成されている。内筒(4)および排水ホース接続口(5)の一体物は、蓋(3)の貫通孔(30)に挿通させられることによって、蓋(3)に接続されている。前記一体物の孔挿通部分は、貫通孔(30)の内周面に密着している。
【0034】
排水ホース接続口(5)は、上端側が側方に向けてL字形に折れ曲がっている。排水ホース接続口(5)の上端部(51)は、洗濯機等の排水ホース(H)の先端部を差し込み易いようにやや外方に拡がっている。また、排水ホース接続口(5)の上端部の外側には、該上端部(51)に差し込まれた排水ホース(H)の先端部を締め付け固定するホース締め具(52)が備えられている。
【0035】
内側環状空隙部(S2)は、水平環状仕切(8)によって、排水溢出孔(23)に通じる排水流通部分(S21)と、通気孔(24)に通じる外気流通部分(S22)とに区画されている。上記の仕切(8)は、有底外筒(2)の小径部(222)内周面における排水溢出孔(23)と通気孔(24)との部分と、該部分に対向する内筒(4)外周面部分との間に介在された水平環状仕切部材(8)によって構成されている。仕切部材(8)の内周面は、軟質樹脂製の内筒(4)の外周面と密着している。仕切部材(8)の外周面には、有底外筒(2)の小径部(222)内周面における排水溢出孔(23)と通気孔(24)との間の部分に密接し得るシール部材(81)が取り付けられている。シール部材(81)は、例えばOリングによって構成される。
【0036】
小径部(222)外周面における排水溢出孔(23)と通気孔(24)との間の部分には、吸気弁(6)への排水(W)の逆流を阻止する逆止弁(9)が設けられている。この逆止弁(9)は、ゴム等の弾性材料により形成され、外周縁部(91)が排水管(P)の上端部内周面に接するように小径部(222)外周面の前記部分に取り付けられたスカート状のものである。
【0037】
蓋(3)は、下側蓋部材(3A)および上側蓋部材(3B)により構成されている。
【0038】
下側蓋部材(3A)は、貫通孔(30)を構成している内周壁(31)、内周壁(31)の下端から外方に伸びた底壁(32)、および底壁(32)の幅中央部から下方に伸びかつ下端部が環状シール部材(10)を介して有底外筒(2)の上端面に受けられた垂下壁(33)を備えている。垂下壁(33)の外周面に雄ねじ部(331)が形成され、この雄ねじ部(331)が床排水口カバー(7)の立上り壁(71)の雌ねじ部(711)にねじ嵌められている。これにより、下側蓋部材(3A)が、床排水口カバー(7)と連結一体化されている。下側蓋部材(3A)の底壁(32)は、垂下壁(33)よりも内側の部分が内方に向かって斜め下向きに伸びる傾斜壁部(321)となされ、垂下壁(33)よりも外側の部分が水平壁部(322)となされている。水平壁部(322)は、床排水口カバー(7)の立上り壁(71)よりも外方に張り出している。
【0039】
一方、上側蓋部材(3B)は、内周縁部が下側蓋部材(3A)の内周壁(31)上端に受けられた頂壁(34)、下側蓋部材(3A)の内周壁(31)外面と重なるように頂壁(34)の内周縁寄りから下方に伸びた内側垂下壁(35)、および頂壁(34)の外周縁から下方に伸びた外側垂下壁(36)を備えている。外側垂下壁(36)内周面の高さ中央部に環状溝(361)が形成されている。この環状溝(361)には、下側蓋部材(3A)の底壁(32)の外周縁部が嵌め込まれている。これにより、上側蓋部材(3B)が下側蓋部材(3A)と連結一体化されている。
【0040】
吸気弁(6)は、蓋(3)の内部に形成され、底壁 (611) の外側部分に床上方空間 (S) に通じるように前記吸気孔 (62) があけられ、かつ底壁 (611) の内側部分に内方空隙部 (S2) に通じるように連通孔 (63) があけられている環状弁室(61)と、弁室(61)に昇降可能に配されかつ吸気孔(62)を塞ぎ得る大きさを有する環状弁体(64)とを備えている。そして、排水管(P)内が負圧状態になると、排水管(P)内に連通した弁室(61)と床上方空間(S)との気圧差により弁体(64)が弁室(61)の底壁(611)から浮上して、吸気孔(62)から外気(A)が導入され、排水管(P)内の負圧状態が解消されると、自重により弁体(64)が弁室(61)の底壁(611)まで降下して、吸気孔(62)が塞がれるようになっている。
【0041】
環状弁室(61)は、下側蓋部材(3A)の内周壁(31)および底壁(32)と、上側蓋部材(3B)の頂壁(34)、内側垂下壁(35)および外側垂下壁(36)の上半部とによって形成されている。
【0042】
吸気孔(62)は、全部で複数個あって、それぞれ平面よりみて略横長方形をしており、弁室(61)の底壁(611)の外側部分、即ち、下側蓋部材(3A)における底壁(32)の水平壁部(322)に、周方向に間隔をおいて設けられている。
【0043】
連通孔(63)も、全部で複数個あって、それぞれ平面よりみて略方形をしており、弁室(61)の底壁(611)の内側部分、即ち、下側蓋部材(3A)における底壁(32)の傾斜壁部(321)に、周方向に間隔をおいて設けられている。
【0044】
弁体(64)は、例えば、パッキンの材料として一般に使用されているゴム等により形成された環板状のものである。弁体(64)の内周縁には、弁室(61)の内周壁(612)(上蓋部材(3B)の内側垂下壁(35))に当接して弁体(64)の昇降を案内する複数の内方凸部(641)が、周方向に間隔をおいて設けられている。
【0045】
次に、図1および2を参照して、上記の吸気弁(6)付き排水トラップ(11)の機能を説明する。
【0046】
まず、洗濯機等からの排水が行われる場合、図1に示すように、排水(W)が、排水ホース(H)を介して、排水ホース接続口(5)から内筒(4)に流入し、下側空隙部(S1)および内側環状空隙部(S2)の排水流通部分(S21)を経て、排水溢出孔(23)から、外側環状空隙部(S3)を含む排水管(P)内に流下する。
【0047】
ここで、排水(W)の流量が多くて流れの勢いが強い状態では、図1に破線で示すように、排水溢出孔(23)から出る排水(W)の流れの圧力により逆止弁(9)の外周縁部(91)が排水管(P)の上端部内周面に押し付けられて逆止弁(9)が閉じた状態となる。これにより、吸気弁(6)への排水(W)の逆流が確実に阻止される。また、この状態では、外側環状空隙部(S3)における逆止弁(9)よりも下側部分を排水(W)がほぼ満水に近い状態で流れるが、該部分が部分的に負圧状態となることもあり得る。しかしながら、この状態では、排水ホース(H)から排水トラップ(11)内にほとんど空気が入ってこないので、不快音の発生や流れ具合の悪化の問題は起こらない。
【0048】
そして、排水(W)の流量が少なくなり、流れの勢いが弱くなってくると、図1に実線で示すように、逆止弁(9)が開く。この状態で外側環状空隙部(S3)が負圧状態になると、外側環状空隙部(S3)に連通した弁室(61)と床上方空間(S)との気圧差により弁体(64)が弁室(61)の底壁(611)から浮上して、吸気孔(62)から弁室(61)内に外気(A)が導入される。導入された外気(A)は、連通孔(63)、内側環状空隙部(S2)の外気流通部(S22)、および通気孔(24)を経て外側環状空隙部(S3)に導入される。これにより、外側環状空隙部(S3)の負圧状態が解消される。したがって、負圧吸引作用による排水(W)への空気の混入により不快音が発生したり、排水の流れが悪くなったりするおそれがない。
【0049】
排水管(P)内の負圧状態が解消されると、図2に示すように、弁体(64)が自重で弁室(61)の底壁(611)まで降下し、それによって吸気孔(62)が塞がれる。そして、洗濯機等からの排水が完全に終わると、有底外筒(2)および内筒(4)の内部に排水溢出孔(23)よりも低い水位で排水が溜まり、それによって封水(W1)が形成される。この封水(W1)により、排水管(P)内の臭気や害虫が床上方空間(S)に漏出するのが防止されるようになっている。また、この状態では、吸気弁(6)も閉じているので、吸気弁(6)からの臭気や害虫の漏出も起こらない。
【0050】
また、図2に示すように排水トラップ(11)内に封水(W1)が形成された状態において、他の排水管内を排水が満水状態で流れて、誘導サイホン作用が生じた場合、外側環状空隙部(S3)を含む排水管(P)内全体が負圧状態となる。この場合にも、上記と同様に吸気弁(6)が開き、排水管(P)内に外気(A)が導入される。これにより排水管(P)内の負圧状態が解消される。特に本発明による吸気弁(6)付き排水トラップ(11)の場合、排水が満水状態で流れる他の排水管の位置が、上の階の排水横枝管に接続された排水管である場合の他、排水トラップ(11)が設置されている排水管(P)が接続された排水横枝管の上流側に接続された排水管である場合にも、確実に作動して、排水管(P)内の負圧状態が解消される点で優れている。
【0051】
図4には、本発明の第2の実施形態が示されている。図4において、吸気弁(6)付き排水トラップ(12)の内筒(4)は、ABS樹脂等の硬質樹脂によって蓋(3)と一体に形成されている。また、排水ホース接続口(5)は、エラストマー等の軟質樹脂によって形成されている。内筒(4A)は、下側蓋部材(3A)における内周壁(31)の下端に連なって垂下状に設けられている。排水ホース接続口(5)は、その垂下状下端部(53)が蓋(3)の貫通孔(30)および内筒(4)の上端部内に差し込まれることにより、蓋(3)に上向きに接続されている。排水ホース接続口(5)の下端部(53)は、貫通孔(30)の内周面に密着している。排水ホース接続口(5)の下端部(53)の最上部分には、環状外向きフランジ(54)が一体に形成されている。このフランジ(54)は、下側蓋部材(3A)の内周壁(31)上端に受けられている。それ以外の構成および機能は、第1の実施形態とほぼ同じである。
【0052】
図5には、本発明の第3の実施形態が示されている。図5において、吸気弁(6)付き排水トラップ(13)の内筒(4)および排水ホース接続口(5)は、それぞれエラストマー等の軟質樹脂によって別体に形成されている。内筒(4)は、その上端部(41)が蓋(3)の貫通孔(30)に差し込まれることにより、蓋(3)に下向きに接続されている。内筒(4)の上端部(41)は、貫通孔(30)の内周面に密着している。排水ホース接続口(5)は、その垂下状下端部(53)が内筒(4)の上端部(41)に差し込まれることにより、該上端部(41)を介して蓋(3)に上向きに接続されている。排水ホース接続口(5)の下端部(53)は、内筒(4)の上端部(41)内周面に密着している。それ以外の構成および機能は、第1の実施形態とほぼ同じである。
【0053】
図6には、本発明の第4の実施形態が示されている。図6の吸気弁(6)付き排水トラップ(14)において、有底外筒(2)の周壁(22)における小径部(222)の上部には、排水溢出孔および通気孔が設けられておらず、これらに代えて、通気兼排水溢出孔(26)が設けられている。通気兼排水溢出孔(26)は、全部で数個あって、それぞれが図1〜3の排水溢出孔(23)と比べてさらに上方に拡大した方形状をしており、小径部(222)の上部に周方向に間隔をおいて配されている。また、図6の吸気弁(6)付き排水トラップ(14)では、環状仕切および逆止弁が設けられていない。それ以外の構成は、第1の実施形態とほぼ同じである。
【0054】
図6の吸気弁(6)付き排水トラップ(14)において、洗濯機等からの排水が行われる場合、排水(W)が、排水ホース(H)を介して、排水ホース接続口(5)から内筒(4)に流入し、下側空隙部(S1)および内側環状空隙部(S2)を経て、通気兼排水溢出孔(26)から、外側環状空隙部(S3)を含む排水管(P)内に流下する。この際、外側環状空隙部(S3)が部分的に負圧状態となり、それに伴い弁体(64)が弁室(61)の底壁(611)から浮上して、吸気孔(62)から外気(A)が導入される。導入された外気(A)は、連通孔(63)、内側環状空隙部(S2)および通気兼排水溢出孔(26)を経て外側環状空隙部(S3)に導入される。これにより外側環状空隙部(S3)の負圧状態が解消される。したがって、排水が終わりに近づいて排水(W)の流れの勢いが弱くなってきても、負圧吸引作用による排水(W)への空気の混入により不快音が発生したり、排水(W)の流れが悪化したりするおそれがない。排水管(P)内の負圧状態が解消されると、弁体(64)が自重で降下して吸気孔(62)を塞ぐ。
【0055】
図示は省略したが、洗濯機等からの排水が完全に終わると、有底外筒(2)および内筒(4)の内部に通気兼排水溢出孔(26)よりも低い水位で排水が溜まり、それによって封水が形成される。また、この封水状態において、誘導サイホン作用により外側環状空隙部(S3)を含む排水管(P)内全体が負圧状態となった場合も、上記と同様にして吸気弁(6)が開き、排水管(P)内に外気(A)が導入される。これにより排水管(P)内の負圧状態が解消され、封水の破壊が阻止される。
【0056】
なお、上記の実施形態はあくまでも例示にすぎず、特許請求の範囲に記載された本発明の要旨を逸脱しない範囲で適宜に変更を加えた上で本発明を実施することも勿論可能である。
【図面の簡単な説明】
【図1】本発明の第1の実施形態を示すものであって、排水が流れている状態の吸気弁付き排水トラップの垂直縦断面図である。
【図2】本発明の第1の実施形態を示すものであって、排水が流れていない封水状態の吸気弁付き排水トラップの垂直縦断面図である。
【図3】図1および2の吸気弁付き排水トラップを分解して示す下方斜視図である。
【図4】本発明の第2の実施形態を示すものであって、排水が流れている状態の吸気弁付き排水トラップの垂直縦断面図である。
【図5】本発明の第3の実施形態を示すものであって、排水が流れている状態の吸気弁付き排水トラップの垂直縦断面図である。
【図6】本発明の第4の実施形態を示すものであって、排水が流れている状態の吸気弁付き排水トラップの垂直縦断面図である。
【符号の説明】
(D):床排水口
(P):排水管
(S):床上方空間
(H):排水ホース
(11)(12)(13)(14):排水トラップ
(2):有底外筒
(2A):有底外筒本体
(2B):アダプタ
(21):底壁
(22):周壁
(221)(221A):大径部
(222):小径部
(23):排水溢出孔
(24):通気孔
(3):蓋
(30):貫通孔
(4):内筒
(5):排水ホース接続口
(6):吸気弁
(61):弁室
(611):(弁室の)底壁
(62):吸気孔
(63):連通孔
(64):弁体
(641):内方凸部
(8):水平環状仕切
(9):逆止弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drainage trap that is installed at a floor drainage port through which drainage from a washing machine or the like flows, for example, and forms trap seal water.
[0002]
[Prior art]
This type of drainage trap includes a bottomed outer cylinder inserted into the upper end of an instrument drainage pipe connected to the floor drainage outlet and having a drainage overflow hole in the peripheral wall, and covers the upper end opening of the bottomed outer cylinder and Known is provided with a lid having a through hole in the center, an inner cylinder connected downward to the through hole of the lid, and a drain hose connection port connected upward to the through hole of the lid .
[0003]
In the above drain trap, drainage from a washing machine or the like flows into the inner cylinder from the hose connection port via the drainage hose, and the lower side between the lower end of the inner cylinder and the bottom wall of the bottomed outer cylinder The outer annular gap between the peripheral wall of the bottomed outer cylinder and the inner peripheral surface of the upper end of the drainage pipe from the drainage overflow hole through the gap and the inner annular gap between the peripheral walls of the inner cylinder and the bottomed outer cylinder It flows down into the instrument drain pipe including the part. The wastewater that has flowed through the appliance drainage pipe usually flows into the sewer via the drainage horizontal branch pipe, the drainage standpipe, and the drainage horizontal main pipe. When the inflow of drainage from the washing machine or the like ends, drainage accumulates at a lower level than the drainage overflow hole inside the bottomed outer cylinder and the inner cylinder, thereby forming sealed water. This sealed water prevents odors and pests in the drain pipe from leaking into the space above the floor.
[0004]
By the way, in the drainage system of an apartment house, for example, the drainage flows in the drainage horizontal branch pipe on the lower floor in a full state, and thus the inside of the appliance drainage pipe is in a negative pressure state. There is a phenomenon of induction siphon action that is attracted to the side and the sealed water is destroyed. Therefore, conventionally, an intake valve that introduces outside air when the inside of the drainage pipe is in a negative pressure state is provided at the upper end of the drainage stack to prevent the sealing of the drain trap.
[0005]
[Problems to be solved by the invention]
However, if multiple drainage pipes are connected to one drainage side branch pipe, the drainage side branch pipes accompany the drainage from the instrument drainage pipe connected to the upstream side of the drainage side branch pipe. The inside of the instrument drain pipe connected to the downstream side may be in a negative pressure state. In this case, the intake valve at the upper end of the drainage stack does not function sufficiently, and the sealed water in the drainage trap is destroyed. Therefore, even in the above drain trap installed at the floor drain port, when the drain pipe is in a negative pressure state due to the same induction siphon action, the drainage accumulated in the drain trap is attracted to the drain pipe side and the sealed water is There is a risk of being destroyed.
[0006]
Further, while the waste water from the washing machine or the like flows down into the drain pipe through the drain trap, the outer annular gap is in a negative pressure state. Thus, when the outer annular gap is in a negative pressure state, the wastewater in the drainage trap is sucked to the drainage pipe side due to the pressure difference, but especially when the drainage is flowing in the drainage trap in a full state, No problem. However, when the inflow amount of the waste water gradually decreases and air is introduced into the drain trap together with the waste water, the air is mixed into the waste water by the suction action. In this case, an unpleasant sound such as a gurgling sound is generated, and the flow of drainage is also deteriorated.
[0007]
An object of the present invention is to prevent the sealing water from being destroyed by the induction siphon action in the drain trap installed at the floor drain outlet, so that no unpleasant noise is generated during drainage and the drainage flow is improved. It is in.
[0008]
[Means for Solving the Problems and Effects of the Invention]
The above object can be achieved by a drain trap with an intake valve according to the present invention.
[0009]
That is, the first drain trap with the intake valve according to the present invention covers the bottomed outer cylinder inserted into the upper end of the drain pipe connected to the floor drain outlet, and covers the upper end opening of the bottomed outer cylinder and at the center. It has a lid with a through hole, an inner cylinder connected downward to the lid so as to communicate with the through hole, and a drain hose connection port connected upward to the lid so as to communicate with the through hole. is there. The inner cylinder has such a length that a lower gap is generated between the bottom wall and the bottom wall of the bottomed outer cylinder, and an inner annular gap is formed between the inner cylinder and the peripheral wall of the bottomed outer cylinder. Has a large outer diameter. The peripheral wall of the bottomed outer cylinder is a large-diameter portion having an outer diameter such that the upper end portion can be joined to the inner peripheral surface of the upper end portion of the drain pipe, and the lower portion of the upper end portion is the drain pipe A small-diameter portion having an outer diameter such that an outer annular void portion is formed between the inner peripheral surface of the upper end portion of the basin, and a drainage overflow hole and a vent hole located above the drainage overflow hole are formed above the small-diameter portion. It has been opened. And on the lid,An air intake hole is formed to communicate the inner annular gap and the space above the floor,When the drain pipe is in a negative pressure stateOpen the air intake ventOutside air is introduced into the drain pipe through the inner annular gap and vent holeWhen the negative pressure in the drain pipe is resolved, the intake hole is closedAn intake valve is provided.
[0010]
In the above drain trap with intake valve, when the drain pipe is in a negative pressure state, the intake valveOpens the intake ventOutside air is introduced into the drain pipe including the outer annular gap through the inner annular gap and the vent hole. Here, there are two cases where the inside of the drain pipe is in a negative pressure state, as is apparent from the description of the section of the solution. One is a case where the drainage flows in the other drainage pipe in a full state and the induction siphon action occurs. In this case, the entire inside of the drain pipe including the outer annular gap is in a negative pressure state, but the negative pressure state is eliminated by introducing outside air into the drain pipe by the intake valve provided in the drain trap itself as described above. Therefore, regardless of the position of other drain pipes in which the drainage flows in a full state, destruction of the sealed water is reliably prevented. In the other case, the drainage flows down into the drainage pipe through the drain trap. In this case, the outer annular gap is partially in a negative pressure state, but the negative pressure state is eliminated by introducing the outside air into the outer annular gap by the intake valve as described above, so the drainage ends. There is no risk of unpleasant noises coming out of the wastewater or the flow of the wastewater getting worse.
[0011]
In the first drain trap with the intake valve according to the present invention, it is preferable that the inner annular gap is partitioned by a horizontal annular partition into a drain circulation part that leads to the drain overflow hole and an outside air circulation part that leads to the vent hole. .
[0012]
If the inner annular gap is divided into the drainage circulation part and the outside air circulation part by the partition as described above, the drainage is prevented from flowing back to the intake valve through the inner annular gap, and the intake valve is connected to the inside of the drain pipe. Introducing outside air into the air is also ensured. Here, the horizontal annular partition may be constituted by a horizontal annular partition member formed separately from the bottomed outer cylinder and the inner cylinder, or at least one of the peripheral walls of the bottomed outer cylinder and the inner cylinder. You may be comprised by the horizontal annular partition formed integrally with these.
[0013]
Further, in the first drain trap with the intake valve according to the present invention, in addition to the partition, a reverse flow of the drain to the intake valve is prevented in a portion between the drain overflow hole and the vent hole on the outer peripheral surface of the small diameter portion. More preferably, a check valve is provided.
[0014]
If there is a check valve as described above, it is possible to more reliably prevent the backflow of drainage to the intake valve. This check valve is made of, for example, an elastic material such as rubber, and has a skirt shape attached to the portion of the outer peripheral surface of the small diameter portion so that the outer peripheral edge portion is in contact with the inner peripheral surface of the upper end portion of the drain pipe. Can do. When the flow rate of drainage is large and the flow is strong, the check valve is closed by the pressure of the drainage flow and the intake valve does not operate. When the drainage approaches the end and the momentum of the drainage flow becomes weaker, the check valve opens, the intake valve operates, and the outside air in the outer annular gap is below the check valve. Is introduced, and the negative pressure state of the portion is eliminated. Therefore, it is less likely to cause problems such as an unpleasant sound generated due to air being mixed into the wastewater due to the negative pressure suction action, or a wastewater flow becoming worse.
[0015]
Next, the second drain trap with an intake valve according to the present invention is:A bottomed outer cylinder inserted into the upper end of the drain pipe connected to the floor drain, a lid that covers the upper end opening of the bottomed outer cylinder and has a through hole in the center, and communicates with the through hole An inner cylinder connected downward to the lid and a drainage hose connection port connected upward to the lid so as to communicate with the through-hole, and the inner cylinder is located below the bottom wall upper surface of the bottomed outer cylinder It has a length such that a void portion is generated, and has an outer diameter such that an inner annular void portion is formed between the inner peripheral surface of the peripheral wall of the bottomed outer cylinder, and the peripheral wall of the bottomed outer cylinder is The upper end portion is a large-diameter portion having an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the drain pipe, and the portion below the upper end portion is between the inner peripheral surface of the upper end portion of the drain pipe. It is a small diameter portion having an outer diameter such that an outer annular void portion is generated,Ventilation and drainage overflow holes are made in the upper part of the small diameter part.AndOn the lid,An air intake hole is formed to communicate the inner annular gap and the space above the floor,When the drain pipe is in a negative pressure stateOpen the air intake ventOutside air is introduced into the drainage pipe through the inner annular gap and ventilation / drainage overflow hole.When the negative pressure in the drain pipe is resolved, the intake hole is closedAn intake valve is provided.
[0016]
This second drainage trap with an intake valve also achieves substantially the same operational effects as the first drainage trap with an intake valve described above. In addition, it is preferable that the ventilation / drainage overflow hole is expanded upward as compared with the drainage overflow hole of the first drainage trap with the intake valve so that the function can be surely exhibited.
[0017]
In the first and second drain traps with the intake valve according to the present invention, the intake valve is formed inside the lid.The intake hole is formed in the outer portion of the bottom wall so as to communicate with the space above the floor, and the communication hole is formed in the inner portion of the bottom wall so as to communicate with the inner gap.With annular valve chamber,An annular valve body that is arranged to be movable up and down in the valve chamber and has a size that can block the intake hole, and when the inside of the drain pipe is in a negative pressure state, the air pressure between the valve chamber communicating with the drain pipe and the space above the floor When the valve body rises from the bottom wall of the valve chamber due to the difference, outside air is introduced from the intake hole, and the negative pressure state in the drain pipe is eliminated, the valve body descends to the bottom wall of the valve chamber by its own weight, The air intake hole may be blocked.
[0018]
If the configuration of the intake valve is as described above, the structure is simple and the intake valve can be easily manufactured. In addition, the opening and closing operation of the valve is automatically and reliably performed by the pressure difference between the inside of the drain pipe and the space above the floor, and there is no fear of odor leakage to the space above the floor or the backflow of drainage.
[0019]
In the case where the intake valve has the above-described configuration, a plurality of inward convex portions that contact the inner peripheral wall of the valve chamber and guide the valve body to be raised and lowered are provided at intervals in the circumferential direction on the inner peripheral edge of the valve body. More preferably.
[0020]
If the inward convex portion as described above is provided on the valve body, the intake hole is reliably closed and opened by raising and lowering the valve body.
[0021]
In the first and second drainage traps with an intake valve according to the present invention, the inner cylinder may be formed integrally with the drainage hose connection port by a soft resin.
[0022]
In the above case, since the inner cylinder and the drainage hose connection port are integrated, the number of parts is reduced accordingly. Moreover, when connecting to the lid, it is only necessary to insert these integrals into the through-holes of the lid, and since the integral is made of a soft resin, the insertion part of the integral is the inner peripheral surface of the through-hole. The special seal member becomes unnecessary. Examples of the soft resin include elastomers and soft vinyl chloride resins.
[0023]
In the first and second drain traps with the intake valve according to the present invention, the inner cylinder may be integrally formed with the lid by a hard resin, and the drain hose connection port may be formed by a soft resin.
[0024]
In the above case, since the inner cylinder and the lid are integrally formed of the hard resin, the number of parts is reduced and the labor for connecting the inner cylinder to the lid can be saved. In addition, since the drain hose connection port is made of a soft resin, by inserting the lower end portion of the drain hose into the through hole of the lid and connecting it, the lower end portion is brought into close contact with the inner peripheral surface of the through hole, and a special sealing member is provided. It becomes unnecessary. Examples of the hard resin include ABS resin.
[0025]
Further, in the first and second drain traps with the intake valve according to the present invention, the inner cylinder and the drain hose connection port may be formed separately from each other by a soft resin.
[0026]
In the above case, for example, the upper end of the inner tube made of soft resin is inserted and connected to the through hole of the lid so that the lower end is in close contact with the inner peripheral surface of the through hole. By inserting and connecting the lower end portion of the connection port to the upper end portion of the inner cylinder, the lower end portion comes into close contact with the inner peripheral surface of the upper end portion of the inner cylinder, so that a special seal member is unnecessary.
[0027]
In the first and second drain traps with the intake valve according to the present invention, the bottomed outer cylinder can be joined to the inner peripheral surface of the upper end portion of the drain pipe having the smaller inner diameter out of the two kinds of drain pipes having different inner diameters. A bottomed outer cylinder main body having a large-diameter portion having an outer diameter at the upper end portion of the peripheral wall, and an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the drain pipe having the larger inner diameter among the two types of drain pipes. And an annular adapter that is arbitrarily fitted and joined to the large-diameter portion of the bottomed outer cylinder main body, and is inserted into the upper end portion of the drain pipe having the smaller inner diameter. In the case where it is configured only by the outer cylinder main body and is inserted into the upper end portion of the drain pipe having the larger inner diameter, it may be configured by a bottomed outer cylinder main body and an adapter.
[0028]
In the above case, even when the drain pipe is composed of any one of, for example, a VU pipe (a pipe having a large inner diameter) and a VP pipe (a pipe having a small inner diameter), it can be easily handled only by using or not using an adapter. Can be convenient.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a first embodiment of the present invention. In these figures, a drain trap (11) with an intake valve (6) according to the present invention has a bottomed outer cylinder (2) inserted into the upper end of a drain pipe (P) connected to a floor drain port (D). A lid (3) that covers the top opening of the bottomed outer cylinder (2) and has a through hole (30) in the center, and is connected downward to the lid (3) so as to communicate with the through hole (30) And a drain hose connection port (5) connected upward to the lid (3) so as to communicate with the through hole (30). The inner cylinder (4) has a length such that a lower gap (S1) is formed between the bottom wall (21) and the upper surface of the bottom wall (21) of the bottomed outer cylinder (2), and the peripheral wall of the bottomed outer cylinder (2). (22) It has an outer diameter such that an inner annular gap (S2) is formed between the inner peripheral surface and the inner peripheral surface. The peripheral wall (22) of the bottomed outer cylinder (2)(P)A large diameter portion (221) having an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the upper portion, and a portion below the upper end portion is a drain pipe(P)A small-diameter portion (222) having an outer diameter such that an outer annular gap portion (S3) is formed between the upper peripheral portion and the inner peripheral surface of the upper end portion, and a drainage overflow hole (23) and a drainage at the upper portion of the small-diameter portion (222) A vent hole (24) located above the overflow hole (23) is formed. And on the lid (3)Inner annular gap (S2) And the space above the floor (S) Intake hole that communicates with (62) Is formed,Drain pipe(P)When the inside is in a negative pressure stateAir intake hole (62) OpenOutside air (A) is introduced into the drain pipe (P) through the inner annular gap (S2) and vent hole (24).And drain pipe (P) When the negative pressure inside is eliminated (62) CloseAn intake valve (6) is provided.
[0030]
The bottomed outer cylinder (2) has two types of drainage pipes with different inner diameters, that is, drainage pipes with large inner diameters consisting of VU pipes.(P)A large-diameter portion (221A) having an outer diameter that can be joined to the inner peripheral surface of the upper end portion of the drain pipe having a small inner diameter among drain pipes (not shown) made of VP pipe and having a small inner diameter is formed on the upper end portion of the peripheral wall (22). The bottomed outer cylinder main body (2A) and the drain pipe with the larger inner diameter of the two types of drain pipes(P)And an annular adapter (2B) that has an outer diameter that can be joined to the inner peripheral surface of the upper end portion and is arbitrarily fitted on the large-diameter portion (221A) of the bottomed outer cylinder body (2A) and joined. ing. And when it is inserted into the upper end of a drain pipe with a small inner diameter, it is composed only of a bottomed outer cylinder body (2A), and a drain pipe with a large inner diameter.(P)In the case of being inserted into the upper end portion, the bottomed outer cylinder main body (2A) and the adapter (2B) are configured. Therefore, in the latter case, the large diameter part (221) of the peripheral wall (22) of the bottomed outer cylinder (2) is composed of the large diameter part (221A) of the bottomed outer cylinder main body (2A) and the adapter (2B). Will be. 1 and 2, a drain pipe having a large inner diameter made of a VU pipe(P)A state in which the bottomed outer cylinder (2) is inserted is shown in FIG. The bottomed outer cylinder body (2A) and the adapter (2B) are formed of a hard resin such as an ABS resin. Joint of bottomed outer cylinder body (2A) and adapter (2B), bottomed outer cylinder body (2A) or adapter (2B) and drain pipe(P)The joining with the inner peripheral surface of the upper end portion is performed using, for example, an adhesive.
[0031]
An annular outward flange (25) is integrally formed at the upper end of the bottomed outer cylinder (2). This flange (25) is engaged with the inner peripheral edge of the upper surface of the floor ring outlet cover (7) in the form of a horizontal ring plate placed on the peripheral edge of the floor drain (D). A rising wall (71) is integrally formed near the inner peripheral edge of the floor drain outlet cover (7). A female thread portion (711) is formed on the inner peripheral surface of the rising wall (71).
[0032]
There are several drainage overflow holes (23) in total, each of which has a large horizontal rectangular shape, and is arranged at an interval in the circumferential direction near the upper end of the small diameter portion (222). There are also a plurality of vent holes (24) in total, each of which has a small horizontal rectangular shape, and is arranged at an upper end portion of the small diameter portion (222) at intervals in the circumferential direction.
[0033]
The inner cylinder (4) is integrally formed with the drain hose connection port (5) by a soft resin such as an elastomer. The integrated body of the inner cylinder (4) and the drainage hose connection port (5) is connected to the lid (3) by being inserted into the through hole (30) of the lid (3). The hole insertion portion of the integrated object is in close contact with the inner peripheral surface of the through hole (30).
[0034]
The drain hose connection port (5) is bent in an L shape with its upper end side facing sideways. The upper end portion (51) of the drain hose connection port (5) extends slightly outward so that the tip of the drain hose (H) of a washing machine or the like can be easily inserted. Further, on the outside of the upper end portion of the drain hose connection port (5), a hose fastener (52) for fastening and fixing the distal end portion of the drain hose (H) inserted into the upper end portion (51) is provided. .
[0035]
The inner annular gap (S2) is partitioned by the horizontal annular partition (8) into a drainage circulation part (S21) leading to the drainage overflow hole (23) and an outside air circulation part (S22) leading to the vent hole (24). ing. The partition (8) includes a portion of the drainage overflow hole (23) and the vent hole (24) on the inner peripheral surface of the small diameter portion (222) of the bottomed outer cylinder (2), and an inner cylinder ( 4) It is comprised by the horizontal annular partition member (8) interposed between outer peripheral surface parts. The inner peripheral surface of the partition member (8) is in close contact with the outer peripheral surface of the soft resin inner cylinder (4). On the outer peripheral surface of the partition member (8), a seal that can come into close contact with the portion between the drainage overflow hole (23) and the vent hole (24) on the inner peripheral surface of the small diameter portion (222) of the bottomed outer cylinder (2) A member (81) is attached. The seal member (81) is configured by, for example, an O-ring.
[0036]
A check valve (9) that prevents backflow of drainage (W) to the intake valve (6) is provided in the portion between the drainage overflow hole (23) and the vent hole (24) on the outer peripheral surface of the small diameter portion (222). Is provided. The check valve (9) is made of an elastic material such as rubber, and the outer peripheral edge (91) is a drain pipe.(P)The small diameter portion (222) has a skirt shape attached to the portion of the outer peripheral surface so as to be in contact with the inner peripheral surface of the upper end portion.
[0037]
The lid (3) is constituted by a lower lid member (3A) and an upper lid member (3B).
[0038]
The lower lid member (3A) includes an inner peripheral wall (31) constituting a through hole (30), a bottom wall (32) extending outward from a lower end of the inner peripheral wall (31), and a bottom wall (32). A hanging wall (33) extending downward from the center of the width and having a lower end received by the upper end surface of the bottomed outer cylinder (2) via an annular seal member (10). A male threaded portion (331) is formed on the outer peripheral surface of the hanging wall (33), and this male threaded portion (331) is screwed into the female threaded portion (711) of the rising wall (71) of the floor drain port cover (7). . Accordingly, the lower lid member (3A) is connected and integrated with the floor drain port cover (7). The bottom wall (32) of the lower lid member (3A) is formed as an inclined wall portion (321) in which a portion inside the hanging wall (33) extends obliquely downward toward the inside, from the hanging wall (33). The outer portion is also a horizontal wall portion (322). The horizontal wall portion (322) projects outward from the rising wall (71) of the floor drain port cover (7).
[0039]
On the other hand, the upper lid member (3B) has a top wall (34) whose inner peripheral edge is received by the upper end of the inner peripheral wall (31) of the lower lid member (3A), and an inner peripheral wall (31) of the lower lid member (3A). ) An inner hanging wall (35) extending downward from the inner peripheral edge of the top wall (34) so as to overlap the outer surface, and an outer hanging wall (36) extending downward from the outer peripheral edge of the top wall (34). Yes. An annular groove (361) is formed at the center of the inner peripheral surface of the outer hanging wall (36). The outer peripheral edge of the bottom wall (32) of the lower lid member (3A) is fitted into the annular groove (361). Thus, the upper lid member (3B) is connected and integrated with the lower lid member (3A).
[0040]
The intake valve (6) is formed inside the lid (3)., Bottom wall (611) The space above the floor in the outer part of (S) Leading to the intake hole (62) Opened and bottom wall (611) Inner void in the inner part of (S2) Communication hole to communicate with (63) Has been openedWith annular valve chamber (61),An annular valve body (64) having a size that can be moved up and down in the valve chamber (61) and can close the intake hole (62) is provided. And drain pipe(P)When the inside becomes negative pressure, drain pipe(P)The valve element (64) rises from the bottom wall (611) of the valve chamber (61) due to the pressure difference between the valve chamber (61) communicating with the interior and the space above the floor (S). (A) was introduced, drain pipe(P)When the negative pressure state is eliminated, the valve body (64) descends to the bottom wall (611) of the valve chamber (61) by its own weight, and the intake hole (62) is blocked.
[0041]
The annular valve chamber (61) includes an inner peripheral wall (31) and a bottom wall (32) of the lower lid member (3A), a top wall (34), an inner hanging wall (35) and an outer side of the upper lid member (3B). It is formed by the upper half part of the drooping wall (36).
[0042]
There are a plurality of intake holes (62) in total, each having a substantially rectangular shape when viewed from the plane, and the outer portion of the bottom wall (611) of the valve chamber (61), that is, the lower lid member (3A) Are provided in the horizontal wall portion (322) of the bottom wall (32) at intervals in the circumferential direction.
[0043]
There are also a plurality of communication holes (63) in total, each of which has a substantially rectangular shape when viewed from the plane, and is formed in the inner part of the bottom wall (611) of the valve chamber (61), that is, in the lower lid member (3A). The inclined wall portion (321) of the bottom wall (32) is provided with an interval in the circumferential direction.
[0044]
The valve body (64) is, for example, an annular plate formed of rubber or the like generally used as a packing material. The valve body (64) is brought into contact with the inner peripheral edge of the valve chamber (61) with the inner peripheral wall (612) of the valve chamber (61) (the inner hanging wall (35) of the upper lid member (3B)) to guide the valve body (64) to move up and down. A plurality of inward convex portions (641) are provided at intervals in the circumferential direction.
[0045]
Next, the function of the drain trap (11) with the intake valve (6) will be described with reference to FIGS.
[0046]
First, when draining from a washing machine or the like, as shown in FIG. 1, drainage (W) flows into the inner cylinder (4) from the drainage hose connection port (5) via the drainage hose (H). The drainage pipe including the outer annular gap (S3) from the drainage overflow hole (23) through the drainage flow part (S21) of the lower gap (S1) and the inner annular gap (S2)(P)It flows down inside.
[0047]
Here, in a state where the flow rate of the waste water (W) is large and the momentum of the flow is strong, as shown by a broken line in FIG. 1, the check valve ( The outer peripheral edge (91) of 9) is pressed against the inner peripheral surface of the upper end of the drain pipe (P), and the check valve (9) is closed. Thereby, the backflow of the waste water (W) to the intake valve (6) is reliably prevented. Further, in this state, the drainage (W) flows in a state where the drainage (W) is almost full in the lower part of the outer annular gap (S3) than the check valve (9), but this part is partially in a negative pressure state. It can be. However, in this state, since almost no air enters the drain trap (11) from the drain hose (H), there is no problem of generation of unpleasant noise or deterioration of the flow condition.
[0048]
When the flow rate of the waste water (W) decreases and the momentum of the flow decreases, the check valve (9) opens as shown by the solid line in FIG. When the outer annular gap (S3) is in a negative pressure state in this state, the valve element (64) is caused by the pressure difference between the valve chamber (61) communicating with the outer annular gap (S3) and the space above the floor (S). Ascending from the bottom wall (611) of the valve chamber (61), outside air (A) is introduced into the valve chamber (61) from the intake hole (62). The introduced outside air (A) is introduced into the outer annular gap (S3) through the communication hole (63), the outside air circulation part (S22) of the inner annular gap (S2), and the vent hole (24). This eliminates the negative pressure state of the outer annular gap (S3). Therefore, there is no possibility that unpleasant noise will be generated due to the mixing of air into the waste water (W) due to the negative pressure suction action, and the flow of the waste water will be deteriorated.
[0049]
Drain pipe(P)When the negative pressure state is eliminated, the valve body (64) descends to the bottom wall (611) of the valve chamber (61) by its own weight as shown in FIG. 2, thereby closing the intake hole (62). Can be removed. When the drainage from the washing machine or the like is completely finished, the drainage collects at a level lower than the drainage overflow hole (23) inside the bottomed outer cylinder (2) and the inner cylinder (4), thereby sealing water ( W1) is formed. With this sealed water (W1), the drain pipe(P)The odor and pest inside are prevented from leaking into the space above the floor (S). In this state, since the intake valve (6) is also closed, no odor or pest leakage from the intake valve (6) occurs.
[0050]
Also, as shown in Fig. 2, when the sealed water (W1) is formed in the drain trap (11), when the drainage flows in the other drain pipe in a full state and the induction siphon action occurs, the outer ring Drain pipe including void (S3)(P)The entire inside is in a negative pressure state. In this case as well, the intake valve (6) opens and the drain pipe(P)Outside air (A) is introduced inside. This makes the drain pipe(P)The negative pressure state inside is eliminated. In particular, in the case of the drain trap (11) with the intake valve (6) according to the present invention, the position of the other drain pipe where the drainage flows in a full state is a drain pipe connected to the drain side branch pipe on the upper floor. Other drainage pipes with drain traps (11)(P)Even when the drainage pipe is connected to the upstream side of the drainage horizontal branch pipe connected to the(P)It is excellent in that the negative pressure state is eliminated.
[0051]
FIG. 4 shows a second embodiment of the present invention. In FIG. 4, the inner cylinder (4) of the drain trap (12) with the intake valve (6) is integrally formed with the lid (3) by a hard resin such as ABS resin. The drain hose connection port (5) is formed of a soft resin such as an elastomer. The inner cylinder (4A) is provided in a hanging shape so as to continue to the lower end of the inner peripheral wall (31) of the lower lid member (3A). The drain hose connection port (5) has its drooping lower end (53) inserted into the through hole (30) of the lid (3) and the upper end of the inner cylinder (4), so that the lid (3) faces upward. It is connected. The lower end (53) of the drain hose connection port (5) is in close contact with the inner peripheral surface of the through hole (30). An annular outward flange (54) is integrally formed at the uppermost portion of the lower end (53) of the drain hose connection port (5). The flange (54) is received by the upper end of the inner peripheral wall (31) of the lower lid member (3A). Other configurations and functions are substantially the same as those of the first embodiment.
[0052]
FIG. 5 shows a third embodiment of the present invention. In FIG. 5, the inner cylinder (4) and the drainage hose connection port (5) of the drain trap (13) with the intake valve (6) are formed separately by a soft resin such as an elastomer. The upper end (41) of the inner cylinder (4) is connected downward to the lid (3) by being inserted into the through hole (30) of the lid (3). The upper end portion (41) of the inner cylinder (4) is in close contact with the inner peripheral surface of the through hole (30). The drainage hose connection port (5) has its drooping lower end (53) inserted into the upper end (41) of the inner cylinder (4) so that it faces upward to the lid (3) via the upper end (41). It is connected to the. The lower end (53) of the drain hose connection port (5) is in close contact with the inner peripheral surface of the upper end (41) of the inner cylinder (4). Other configurations and functions are substantially the same as those of the first embodiment.
[0053]
FIG. 6 shows a fourth embodiment of the present invention. In the drain trap (14) with the intake valve (6) of FIG. 6, a drain overflow hole and a vent hole are provided in the upper part of the small diameter portion (222) in the peripheral wall (22) of the bottomed outer cylinder (2). Instead, a ventilation / drainage overflow hole (26) is provided instead. There are several ventilation / drainage overflow holes (26) in total, each of which has a rectangular shape that is further expanded upward compared to the drainage overflow holes (23) of FIGS. Is arranged at intervals in the circumferential direction. Further, in the drain trap (14) with the intake valve (6) of FIG. 6, an annular partition and a check valve are not provided. The other configuration is almost the same as that of the first embodiment.
[0054]
In the drain trap (14) with the intake valve (6) in FIG. 6, when draining from a washing machine or the like is performed, drainage (W) is drained from the drainage hose connection port (5) via the drainage hose (H). A drainage pipe that flows into the inner cylinder (4), passes through the lower gap (S1) and the inner annular gap (S2), and includes the outer annular gap (S3) from the vent / drainage overflow hole (26).(P)It flows down inside. At this time, the outer annular gap (S3) is partially in a negative pressure state, and the valve body (64) is lifted from the bottom wall (611) of the valve chamber (61) and the outside air from the intake hole (62). (A) is introduced. The introduced outside air (A) is introduced into the outer annular gap (S3) through the communication hole (63), the inner annular gap (S2), and the ventilation / drainage overflow hole (26). This eliminates the negative pressure state of the outer annular gap (S3). Therefore, even if drainage approaches the end and the momentum of the flow of drainage (W) becomes weak, unpleasant noise may be generated due to air mixing into the drainage (W) due to negative pressure suction action, or the drainage (W) There is no fear that the flow will deteriorate. Drain pipe(P)When the negative pressure state is eliminated, the valve body (64) descends by its own weight and closes the intake hole (62).
[0055]
Although illustration is omitted, when drainage from the washing machine or the like is completely finished, drainage is accumulated at a lower level than the ventilation / drainage overflow hole (26) inside the bottomed outer cylinder (2) and inner cylinder (4). , Thereby forming a sealed water. In this sealed state, the drainage pipe including the outer annular gap (S3) by induction siphon action(P)Even when the entire interior is in a negative pressure state, the intake valve (6) opens in the same manner as above, and the drain pipe(P)Outside air (A) is introduced inside. This makes the drain pipe(P)The negative pressure state inside is eliminated, and destruction of the sealed water is prevented.
[0056]
It should be noted that the above embodiment is merely an example, and it is of course possible to implement the present invention with appropriate modifications without departing from the scope of the present invention described in the claims.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a state where drainage is flowing.
FIG. 2 is a vertical longitudinal sectional view of a drain trap with an intake valve in a sealed state in which drainage does not flow, showing the first embodiment of the present invention.
3 is an exploded perspective view of the drain trap with an intake valve of FIGS. 1 and 2 in an exploded manner.
FIG. 4 shows a second embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a state where drainage is flowing.
FIG. 5 shows a third embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a state where drainage is flowing.
FIG. 6 shows a fourth embodiment of the present invention and is a vertical longitudinal sectional view of a drain trap with an intake valve in a state where drainage is flowing.
[Explanation of symbols]
(D): Floor drain
(P): Drain pipe
(S): Space above the floor
(H): Drain hose
(11) (12) (13) (14): Drain trap
(2): Bottomed outer cylinder
(2A): Bottomed outer cylinder body
(2B): Adapter
(21): Bottom wall
(22): Perimeter wall
(221) (221A): Large diameter part
(222): Small diameter part
(23): Drainage overflow hole
(24): Ventilation hole
(3): Lid
(30): Through hole
(4): Inner cylinder
(5): Drain hose connection port
(6): Intake valve
(61): Valve chamber
(611): Bottom wall (of the valve chamber)
(62): Air intake hole
(63): Communication hole
(64) : Valve
(641): Inward convex
(8): Horizontal annular partition
(9): Check valve
Claims (10)
内筒(4)は、有底外筒(2)の底壁(21)上面との間に下側空隙部(S1)が生じるような長さを有するとともに、有底外筒(2)の周壁(22)内周面との間に内側環状空隙部(S2)が生じるような外径を有しており、
有底外筒(2)の周壁(22)は、その上端部が、排水管(P)の上端部内周面に接合し得るような外径を有する大径部(221)となされるとともに、上端部よりも下側の部分が、排水管(P)の上端部内周面との間に外側環状空隙部(S3)が生じるような外径を有する小径部(222)となされ、小径部(222)の上部に、排水溢出孔(23)と、排水溢出孔(23)よりも上方に位置する通気孔(24)とがあけられており、
蓋(3)に、内側環状空隙部 (S2) と床上方空間 (S) とを連通させる吸気孔 (62) が形成されているとともに、排水管(P)内が負圧状態になった時に吸気孔 (62) を開いて内側環状空隙部(S2)および通気孔(24)を通じて排水管(P)内に外気(A)を導入し、排水管 (P) 内の負圧状態が解消されると吸気孔 (62) を閉じる吸気弁(6)が設けられている、吸気弁付き排水トラップ。A bottomed outer cylinder (2) inserted into the upper end of the drain pipe (P) connected to the floor drainage port (D), and a through hole ( 30) with a lid (3), an inner cylinder (4) connected downward to the lid (3) so as to communicate with the through hole (30), and a lid (3) so as to communicate with the through hole (30). ) And a drainage hose connection port (5) connected upward,
The inner cylinder (4) has such a length that a lower gap (S1) is formed between the bottom wall (21) and the upper surface of the bottom wall (21) of the bottomed outer cylinder (2). It has an outer diameter such that an inner annular gap (S2) occurs between the peripheral wall (22) and the inner peripheral surface,
The peripheral wall (22) of the bottomed outer cylinder (2) has a large-diameter portion (221) having an outer diameter such that the upper end portion can be joined to the inner peripheral surface of the upper end portion of the drain pipe (P), The portion below the upper end is a small diameter portion (222) having an outer diameter such that an outer annular void (S3) is formed between the inner peripheral surface of the upper end of the drain pipe (P), and the small diameter portion ( 222), a drainage overflow hole (23) and a vent hole (24) located above the drainage overflow hole (23) are opened,
The lid (3) has an intake hole (62) that allows the inner annular gap (S2) and the space above the floor (S) to communicate with each other, and when the inside of the drain pipe (P) is in a negative pressure state. Opening the intake hole (62) and introducing outside air (A) into the drain pipe (P) through the inner annular gap (S2) and vent hole (24) eliminates the negative pressure state in the drain pipe (P) . A drain trap with an intake valve, which is provided with an intake valve (6 ) that closes the intake hole (62) .
内筒 (4) は、有底外筒 (2) の底壁 (21) 上面との間に下側空隙部 (S1) が生じるような長さを有するとともに、有底外筒 (2) の周壁 (22) 内周面との間に内側環状空隙部 (S2) が生じるような外径を有しており、
有底外筒 (2) の周壁 (22) は、その上端部が、排水管 (P) の上端部内周面に接合し得るような外径を有する大径部 (221) となされるとともに、上端部よりも下側の部分が、排水管 (P) の上端部内周面との間に外側環状空隙部 (S3) が生じるような外径を有する小径部 (222) となされ、小径部(222)の上部に、通気兼排水溢出孔(26)があけられており、
蓋(3)に、内側環状空隙部 (S2) と床上方空間 (S) とを連通させる吸気孔 (62) が形成されているとともに、排水管(P)内が負圧状態になった時に吸気孔 (62) を開いて内側環状空隙部(S2)および通気兼排水溢出孔(26)を通じて排水管(P)内に外気(A)を導入し、排水管 (P) 内の負圧状態が解消されると吸気孔 (62) を閉じる吸気弁(6)が設けられている、吸気弁付き排水トラップ。 It bottomed outer cylinder which is inserted into the upper end portion of the floor drain port (D) connected to the drainage pipe (P) and (2), covering the top opening of the bottomed outer cylinder (2) and the central portion in the through hole ( a lid 30) is opened (3), a tubular (4) among connected downwards to the lid (3) so as to communicate the through hole (30), the lid so as to communicate the through hole (30) (3 ) And a drainage hose connection port (5) connected upward ,
The inner cylinder (4), which has a length such lower air gap (S1) is formed between the bottom wall (21) the upper surface of the bottom outer cylinder (2), a bottomed outer cylinder (2) It has an outer diameter such that an inner annular gap (S2) occurs between the peripheral wall (22) and the inner peripheral surface ,
The peripheral wall (22) of the bottomed outer cylinder (2) has a large-diameter portion (221) having an outer diameter such that the upper end portion can be joined to the inner peripheral surface of the upper end portion of the drain pipe (P) , The portion below the upper end is a small diameter portion (222) having an outer diameter such that an outer annular void (S3) is formed between the inner peripheral surface of the upper end of the drain pipe (P) , and the small diameter portion ( At the top of 222) there is a vent and drainage overflow hole (26) ,
The lid (3) has an intake hole (62) that allows the inner annular gap (S2) and the space above the floor (S) to communicate with each other, and when the inside of the drain pipe (P) is in a negative pressure state. Open air intake hole (62) and introduce outside air (A) into drain pipe (P) through inner annular gap (S2) and vent / drain overflow hole (26 ) , and negative pressure in drain pipe (P) A drain trap with an intake valve, which is provided with an intake valve (6) that closes the intake hole (62) when the problem is resolved .
排水管(P)内が負圧状態になると、排水管(P)内に連通した弁室(61)と床上方空間(S)との気圧差により弁体(64)が弁室(61)の底壁(611)から浮上して、吸気孔(62)から外気(A)が導入され、
排水管(P)内の負圧状態が解消されると、自重により弁体(64)が弁室(61)の底壁(611)まで降下して、吸気孔(62)が塞がれるようになっている、請求項1〜4のいずれか1つに記載の吸気弁付き排水トラップ。An intake valve (6) is formed inside the lid (3), the intake hole (62) is opened in the outer portion of the bottom wall (611) so as to communicate with the space above the floor (S) , and the bottom wall ( 611) an annular valve chamber (61) in which a communication hole ( 63) is opened so as to communicate with the inner gap (S2) in the inner portion, and the valve chamber (61) is arranged to be movable up and down and an intake hole ( 62) and an annular valve body (64) having a size capable of closing
When the inside of the drain pipe (P) is in a negative pressure state, the valve body (64) is moved to the valve chamber (61) by the pressure difference between the valve chamber (61) communicating with the drain pipe (P) and the space above the floor (S). Ascending from the bottom wall (611) of the air, outside air (A) is introduced from the intake hole (62),
When the negative pressure in the drain pipe (P) is resolved, the valve body (64) descends to the bottom wall (611) of the valve chamber (61) due to its own weight, and the intake hole (62) is blocked. The drainage trap with an intake valve according to any one of claims 1 to 4.
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JP2002002313A JP3911588B2 (en) | 2002-01-09 | 2002-01-09 | Drain trap with intake valve |
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JP2002002313A JP3911588B2 (en) | 2002-01-09 | 2002-01-09 | Drain trap with intake valve |
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JP3911588B2 true JP3911588B2 (en) | 2007-05-09 |
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JP4861763B2 (en) * | 2006-07-18 | 2012-01-25 | 株式会社テクノテック | Drain trap |
JP5368406B2 (en) * | 2010-10-07 | 2013-12-18 | 吉矢 小薗 | Hybrid drainage device |
JP6078721B2 (en) * | 2012-02-29 | 2017-02-15 | 丸一株式会社 | Backflow prevention device |
KR101472968B1 (en) * | 2013-09-04 | 2014-12-16 | 주식회사 에브윈 | Air vent for sewage and waste water line |
JP6007382B1 (en) * | 2015-10-26 | 2016-10-12 | 株式会社テクノテック | Drain trap, valve member, and flow path unit |
CN111407194B (en) * | 2019-01-04 | 2023-07-21 | 宁波方太厨具有限公司 | Overflow, exhaust and soft water integrated module |
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