JP3825544B2

JP3825544B2 - Public drop sputum occlusion device

Info

Publication number: JP3825544B2
Application number: JP29820197A
Authority: JP
Inventors: 直志霜田
Original assignee: Maezawa Kasei Kogyo KK
Current assignee: Maezawa Kasei Kogyo KK
Priority date: 1997-10-30
Filing date: 1997-10-30
Publication date: 2006-09-27
Anticipated expiration: 2017-10-30
Also published as: JPH11131572A

Description

【０００１】
【発明の属する技術分野】
本発明は、公共ドロップ桝本体内に着脱可能に取り付けて、公共ドロップ桝本体の流出側接続口部を閉塞する公共ドロップ桝用閉塞装置に関する。
【０００２】
【従来の技術】
一般に、宅地内の排水管の末端は、公共桝本体に接続され、この公共桝本体は、宅地外の公道下に敷設した下水本管との高低差等の関係で、下方に流出口を開口形成した公共ドロップ桝本体が用いられる。
【０００３】
この公共ドロップ桝本体は、例えば上部に大径の流入側接続口部を形成するとともに下部に小径の流出側接続口部を縮径段部を介して形成した構造が採られている。
【０００４】
そして、この公共ドロップ桝本体の流出側接続口部には、取付管等を介して下水本管が接続され、宅地内からの排水は、宅地内の排水管から、立上がり管、公共ドロップ桝本体、取付管等を経て、その下水本管に流れ、最終的に下水処理場に流れ込むようになっている。
【０００５】
ここで、この排水系の敷設は、一般に、宅地造成時に、宅地外の公道下に下水本管を敷設し、この下水本管から取付管を分岐して、この取付管を公共ドロップ桝本体の流出側接続口部に接続する。次いで、この取付管を介して前記下水本管に連通した公共ドロップ桝本体の流入側接続口部に、立上がり管を介して開閉蓋を地表に面して設置する。そして、この立上がり管の途中に形成された接続口部に着脱可能に閉塞具を取り付けて、この閉塞具でその接続口部を閉塞した後、この立上がり管、公共ドロップ桝本体等を一旦埋め戻しておく。
【０００６】
宅地造成が完成し、建物が建築された後に、前記立上がり管の接続口部近傍まで掘り下げ、前記閉塞具を立上がり管の接続口部から取り外し、この接続口部に宅地内の建物からの排水を流す排水管の末端を接続することによりこの宅地内の排水管の末端と前記公共ドロップ桝本体と前記下水本管とをそれぞれ連通させて、排水系の敷設作業を完了する。
【０００７】
しかしながら、上記排水系において、下水本管に連通した公共ドロップ桝本体の埋設後であって下水の供用開始前に、宅地内の排水管の末端が、公共ドロップ桝本体を介して下水本管に連通された場合には、宅地内から排水が流出されたときに、この排水は宅地内の排水管から公共ドロップ桝本体等を経て、下水本管に流れ、最終的に、未だ稼働していない下水処理場に流れ込んでしまうおそれがある問題を有している。
【０００８】
また、下水処理場が稼働している場合でも、地方自治体等の下水道事業者に無断で宅地内の排水管の末端が、公共ドロップ桝本体を介して下水本管に連通されると、下水道施設が無断で利用される問題がある。
【０００９】
従来、埋設した公共ドロップ桝本体の流出側接続口部を、例えば、実公平３−３２６１７号公報に記載の排水桝用栓体を用いて閉塞する方法が知られていた。
【００１０】
この排水桝用栓体は、流出側接続口部に嵌挿される挿入管部を有し、この挿入管部の外周部に弾性シール材を嵌着した環状の嵌合凹部を形成し、かつ、この挿入管部の開口部を外面に把手部を形成した閉塞底蓋部にて閉塞した構造が採られている。
【００１１】
【発明が解決しようとする課題】
しかしながら、このような実公平３−３２６１７号公報に記載の排水桝用栓体では、底蓋部の把手部を把持して、公共ドロップ桝本体の上部側へ引っ張れば、簡単に引き抜くことができるため、簡単に閉塞状態が解除される問題がある。
【００１２】
本発明は、このような点に鑑みなされたもので、公共ドロップ桝本体の流出側接続口部の閉塞状態が簡単に解除されることを防止する公共ドロップ桝用閉塞装置を提供することを目的とする。
【００１３】
【課題を解決するための手段】
請求項１記載の公共ドロップ桝用閉塞装置は、上部に開口部が形成されかつ流出側接続口部が下部に形成された公共ドロップ桝本体内に着脱可能に取り付けられ、この公共ドロップ桝本体の前記流出側接続口部を閉塞する公共ドロップ桝用閉塞装置であって、前記公共ドロップ桝本体の前記流出側接続口部の内周面に嵌合され、この流出側接続口部を閉塞する閉塞嵌合部材と、前記公共ドロップ桝本体の前記流出側接続口部の内側に前記閉塞嵌合部材に対向して相対的に接離する方向に移動可能に配設される締付け移動部材と、この締付け移動部材と前記閉塞嵌合部材との間に配設される被締付けリング部材と、前記公共ドロップ桝本体の上部側から操作される操作部を有し、この操作部の操作に基づき前記締付け移動部材を前記閉塞嵌合部材に向って相対的に移動させ前記被締付けリング部材をこの閉塞嵌合部材と締付け移動部材とで締め付けて、この被締付けリング部材の外周面を前記公共ドロップ桝本体の前記流出側接続口部の内周面に圧接させる締付け機構とを具備したものである。
【００１４】
公共ドロップ桝本体の流出側接続口部を閉塞する場合、まず、被締付けリング部材を閉塞嵌合部材と締付け移動部材との間に配設させた状態で、この被締付けリング部材、閉塞嵌合部材および締付け移動部材を、公共ドロップ桝本体内に挿入し、この閉塞嵌合部材は流出側接続口部の内周面に嵌合された状態とする。
【００１５】
次いで、締付け機構の操作部を、公共ドロップ桝本体の上部側から操作すると、この操作部の操作に基づき、締付け移動部材が閉塞嵌合部材に向って相対的に移動する。
【００１６】
そして、この締付け移動部材の移動により、被締付けリング部材が、この締付け移動部材と閉塞嵌合部材とで締め付けられて、この被締付けリング部材の外周面が流出側接続口部の内周面に圧接する。
【００１７】
この状態で、閉塞嵌合部材が、締付け移動部材および被締付けリング部材にて保持されて、この保持された閉塞嵌合部材により、公共ドロップ桝本体の流出側接続口部が閉塞される。
【００１８】
なお、締付け機構の操作部を閉塞する場合とは逆に操作等して、締付け移動部材を閉塞嵌合部材から離反する方向に相対的に移動させ、閉塞嵌合部材と締付け移動部材とによる被締付けリング部材の締付けを解除し、流出側接続口部の内周面と被締付けリング部材の外周面との圧接を解き、被締付けリング部材、閉塞嵌合部材および締付け移動部材を公共ドロップ桝本体外に取り出して、公共ドロップ桝本体の流出側接続口部を開放する。
【００１９】
請求項２記載の公共ドロップ桝用閉塞装置は、請求項１記載の公共ドロップ桝用閉塞装置において、締付け機構は、公共ドロップ桝本体の上部側から閉塞嵌合部材の中央部に設けた挿通孔に挿通して締付け移動部材の中央部に設けた螺合孔に螺合された螺合部を一端に形成するとともに前記公共ドロップ桝本体の上部側から操作される操作部を他端に形成した回動操作軸を備えたものである。
【００２０】
被締付けリング部材、閉塞嵌合部材および締付け移動部材を、公共ドロップ桝本体内に挿入すると、閉塞嵌合部材が流出側接続口部の内周面に嵌合される。
【００２１】
次いで、回動操作軸の操作部を、公共ドロップ桝本体の上部側から回動操作すると、この操作部の回動操作に基づき、回動操作軸の螺合部が締付け方向に回動し、この螺合部の回動に伴い、締付け移動部材が閉塞嵌合部材に向って相対的に移動する。
【００２２】
そして、この締付け移動部材の移動により、被締付けリング部材が、この締付け移動部材と閉塞嵌合部材とで締め付けられて、この被締付けリング部材の外周面が流出側接続口部の内周面に圧接する。
【００２３】
この状態で、閉塞嵌合部材が、締付け移動部材および被締付けリング部材にて保持されて、この保持された閉塞嵌合部材により、公共ドロップ桝本体の流出側接続口部が閉塞される。
【００２４】
一方、公共ドロップ桝本体の流出側接続口部を開放する場合、回動操作軸の操作部を、公共ドロップ桝本体の上部側から、閉塞する場合とは逆方向に回動操作すると、この操作部の回動操作に基づき、回動操作軸の螺合部が締付け解除方向に回動する。この螺合部の回動に伴い、締付け移動部材が閉塞嵌合部材から離反する方向に相対的に移動する。
【００２５】
そして、この締付け移動部材の移動により、閉塞嵌合部材と締付け移動部材とによる被締付けリング部材の締付けが解除され、この被締付けリング部材の外周面が流出側接続口部の内周面から離れる。そして、回動操作軸を利用して、被締付けリング部材、閉塞嵌合部材および締付け移動部材を公共ドロップ桝本体外に取り出して、公共ドロップ桝本体の流出側接続口部を開放状態にする。
【００２６】
請求項３記載の公共ドロップ桝用閉塞装置は、請求項１または２記載の公共ドロップ桝用閉塞装置において、公共ドロップ桝本体は、上部に開口部を形成するとともに下部に縮径段部を介して前記上部の開口部より小径の流出側接続口部を形成し、閉塞嵌合部材は、周縁部に前記縮径段部に係止される係止部を突出形成したものである。
【００２７】
被締付けリング部材、閉塞嵌合部材および締付け移動部材が公共ドロップ桝本体内に挿入されて、閉塞嵌合部材が小径の流出側接続口部の内周面に嵌合された状態では、この閉塞嵌合部材の周縁部に突出形成した係止部は、縮径段部に係止した状態にある。
【００２８】
請求項４記載の公共ドロップ桝用閉塞装置は、請求項１ないし３のいずれかに記載の公共ドロップ桝用閉塞装置において、閉塞嵌合部材は、公共ドロップ桝本体の流出側接続口部の内周面に嵌合される嵌合筒部を有し、この嵌合筒部の外周面は、上方に向って拡開したテーパー面に形成したものである。
【００２９】
被締付けリング部材を、閉塞嵌合部材と締付け移動部材との間に配設させた状態で、この被締付けリング部材、閉塞嵌合部材および締付け移動部材を、公共ドロップ桝本体内に挿入すると、閉塞嵌合部材の嵌合筒部のテーパー面には、流出側接続口部の内周面から内方に向う力が作用し、この状態で、閉塞嵌合部材の嵌合筒部が流出側接続口部の内周面に密着嵌合する。
【００３０】
請求項５記載の公共ドロップ桝用閉塞装置は、請求項２ないし４のいずれかに記載の公共ドロップ桝用閉塞装置において、締付け移動部材は、上下面に貫通した回り止め規制孔を有し、閉塞嵌合部材は、前記締付け移動部材に対向する閉塞基板部を有し、この閉塞基板部には、中央部に回動操作軸の螺合部を挿通する挿通孔を設けるとともに周縁部に前記締付け移動部材の前記回り止め規制孔に上下方向に移動可能に嵌挿する回り止め突起部を突設したものである。
【００３１】
被締付けリング部材を、閉塞嵌合部材と締付け移動部材との間に配設させた状態では、回動操作軸の螺合部は、閉塞嵌合部材の閉塞基板部の中央部に設けた挿通孔に挿通され、かつ、締付け移動部材の中央部に設けた螺合孔に螺合された状態にある。
【００３２】
また、この螺合部が螺合孔に螺合した状態では、閉塞嵌合部材の閉塞基板部の周縁部に突設した回り止め突起部は、締付け移動部材の回り止め規制孔に、上下方向に移動可能に嵌挿された状態にある。
【００３３】
そして、公共ドロップ桝本体内に挿入した後における回動操作軸の操作部の回動操作の際に、この回り止め突起部は、回り止め規制孔にてその回動が規制されるため、回動操作軸とともに、締付け移動部材が回動することを防止する。
【００３４】
請求項６記載の公共ドロップ桝用閉塞装置は、請求項１ないし５のいずれかに記載の公共ドロップ桝用閉塞装置において、閉塞嵌合部材および締付け移動部材には、上下面にそれぞれ貫通した結露水を流す結露水排出用孔を設けたものである。
【００３５】
結露により生じた水滴等の結露水は、結露水排出用孔を流れて、公共ドロップ桝本体の流出側接続口部を通って、公共ドロップ桝本体外へ排出される。
【００３６】
請求項７記載の公共ドロップ桝用閉塞装置は、請求項２ないし６のいずれかに記載の公共ドロップ桝用閉塞装置において、締付け移動部材の螺合孔から突出した回動操作軸の先端部には、前記締付け移動部材の抜け止め部を設けたものである。
【００３７】
公共ドロップ桝本体の流出側接続口部を開放する場合において、回動操作軸の操作部を、閉塞する場合とは逆方向に回動操作すると、回動操作軸の螺合部が締付け解除方向に回動し、締付け移動部材が移動する。
【００３８】
そして、この締付け移動部材の移動の際に、回動操作軸の先端部に設けた抜け止め部にて、この締付け移動部材の移動が制限されるため、その結果、回動操作軸の回動操作も制限され、締付け移動部材が回動操作軸から抜け外れて落下することを防止する。
【００３９】
【発明の実施の形態】
以下、本発明の公共ドロップ桝用閉塞装置の一実施の形態の構成を図１ないし図３を参照して説明する。
【００４０】
図１ないし図３において、１は公共ドロップ桝本体で、この公共ドロップ桝本体１は、例えば、塩化ビニル樹脂などの合成樹脂にて、上下方向に向ってそれぞれ開口した略筒状に成形されている。
【００４１】
この公共ドロップ桝本体１の上部には、管部２の上端周縁に連続して、この管部２と比べて外径が大きい大径の略円筒状の開口部としての流入側接続口部３が形成されている。この流入側接続口部３は点検掃除口を兼ねている。
【００４２】
また、この公共ドロップ桝本体１の下部には、前記管部２の下端周縁に連続して、下方に向って縮径した截頭円錐状の縮径段部４が形成されている。さらに、この縮径段部４の下端周縁に連続して前記流入側接続口部３と比べて小径の略円筒状の流出側接続口部５が形成されている。
【００４３】
そして、この公共ドロップ桝本体１は、図３に示すように、例えば宅地内の地表下に埋設され、前記流入側接続口部３には、立上がり管８を介して開閉蓋９が、地表に面して設置されている。また、この立上がり管８は、長手方向の略中央部に突出形成された接続口部10を有し、この接続口部10には、宅地内の排水管12の末端が接続されている。
【００４４】
一方、この公共ドロップ桝本体１の前記流出側接続口部５には、ソケット15およびエルボ16を介して取付管17が接続され、この取付管17の先端は図示しない下水本管に接続されている。
【００４５】
そして、宅地内からの排水等は、宅地内の排水管12から、立上がり管８、公共ドロップ桝本体１、ソケット15、エルボ16、取付管17を経て、下水本管に流れ、最終的に下水処理場に流れ込むようになっている。
【００４６】
図１および図２において、21は公共ドロップ桝用閉塞装置で、この公共ドロップ桝用閉塞装置21は、図１に示すように、締付け移動部材23と、この締付け移動部材23と対向する閉塞嵌合部材25と、この閉塞嵌合部材25と前記締付け移動部材23との間に配設される被締付けリング部材27と、この被締付けリング部材27を前記締付け移動部材23と前記閉塞嵌合部材25とで締め付ける締付け機構31とを備えている。
【００４７】
前記締付け移動部材23は、塩化ビニル樹脂などの合成樹脂にて、略円形板状に成型され、その外径は前記公共ドロップ桝本体１の前記流出側接続口部５の内径より小さい寸法となっている。
【００４８】
そして、この締付け移動部材23は、略円形板状の円形基板部41を有し、この円形基板部41の肉厚中央部42の上側には挿通孔43が設けられ、かつ、この円形基板部41の肉厚中央部42の下側には例えば六角ナット45の埋込みにより螺合孔47が設けられている。この螺合孔47と前記挿通孔43とが連続して、この肉厚中央部42の上下面に貫通している。
【００４９】
また、この円形基板部41の周縁近傍には、この円形基板部41の中心点を含む直線上であってこの中心点から対称位置に、上下面に貫通した２つの回り止め規制孔49が設けられている。
【００５０】
さらに、この円形基板部41の下面には、リブ部50が一体に突設され、このリブ部50は、例えば、前記肉厚中央部42に連続して放射状に形成された４つの直線リブ部52と、この４つの直線リブ部52の中間部を結んで前記肉厚中央部42と同軸状に形成された１つの円リブ部53とにて構成されている。
【００５１】
また、この円形基板部41には、上下面に貫通した比較的小径の結露水排出用孔55が設けられている。
【００５２】
さらに、この円形基板部41の周縁からは、下方に向って拡径した截頭円錐状の締付け縁部56が一体に設けられ、この締付け縁部56の外周面は押圧面57に形成されている。
【００５３】
次に、前記閉塞嵌合部材25は、塩化ビニル樹脂などの合成樹脂にて、略円形状に成型され、その外径は前記公共ドロップ桝本体１の前記流出側接続口部５の内径より大きい寸法となっている。
【００５４】
そして、この閉塞嵌合部材25は、前記締付け移動部材23の円形基板部41と対向して位置する略円形板状の閉塞基板部62を有し、この閉塞基板部62の肉厚中央部64には、上下面に貫通した挿通孔65が設けられている。この挿通孔65は、前記締付け移動部材23の円形基板部41の肉厚中央部42に設けた挿通孔43と同じ径寸法で形成されている。
【００５５】
また、この閉塞基板部62の周縁部には、この閉塞基板部62の中心点を含む直線上であってこの中心点から対称位置に、２つの回り止め突起部66が下方に向って突設されている。
【００５６】
そして、この回り止め突起部66は、前記締付け移動部材23の円形基板部41に設けた２つの回り止め規制孔49に上下方向に移動可能に嵌挿されている。なお、この各回り止め突起部66は細長で中空の有底円筒状に形成されている。
【００５７】
さらに、この閉塞基板部62の上面からは、リブ部70が一体に突設され、このリブ部70は、例えば、前記肉厚中央部64に連続して放射状に形成された４つの直線リブ部72と、この４つの直線リブ部52の中間部を結ぶようにして前記肉厚中央部42と同軸状に形成された１つの円リブ部73とにて構成されている。
【００５８】
また、この閉塞基板部62には、前記円形基板部41に設けた結露水排出用孔55に対向する位置に、上下面に貫通した比較的小径の結露水排出用孔75が設けられている。
【００５９】
さらに、この閉塞基板部62の周縁からは、上方に向って拡径した截頭円錐状の締付け部76が一体に設けられ、この締付け部76の外周面は押圧面77に形成されている。
【００６０】
また、この締付け部76に連続して、前記公共ドロップ桝本体１の流出側接続口部５の内周面5aに嵌合される短寸法の嵌合筒部80が一体に設けられ、この嵌合筒部80の外周面には、上方に向って拡開した例えば２°の傾斜角を有するテーパー面81が形成されている。また、この嵌合筒部80の外周縁には、例えば全周にわたって、前記公共ドロップ桝本体１の縮径段部４に係止される係止部83が外方に向って突出形成されている。
【００６１】
次いで、前記被締付けリング部材27は、シール性の有する合成ゴム等の弾性材にて、略リング状に成形され、その外径は前記公共ドロップ桝本体１の前記流出側接続口部５の内径より小さい寸法となっている。
【００６２】
そして、この被締付けリング部材27の内周面は、中央に向って縮径した被押圧面となっており、図２に示す公共ドロップ桝本体１の流出側接続口部５の閉塞状態では、この被押圧面の下側の傾斜面は前記締付け移動部材23の締付け縁部56の押圧面57と圧接し、かつ、この被押圧面の上側の傾斜面は前記閉塞嵌合部材25の締付け部76の押圧面77とに圧接する。
【００６３】
なお、この被締付けリング部材27の外周面は、図１に示す公共ドロップ桝本体１の流出側接続口部５の閉塞解除状態では、前記公共ドロップ桝本体１の流出側接続口部５の内周面5aから離間しているが、図２に示す公共ドロップ桝本体１の流出側接続口部５の閉塞状態では、この被締付けリング部材27が締付け移動部材23と閉塞嵌合部材25とで締め付けられることによって変形して、この公共ドロップ桝本体１の流出側接続口部５の内周面5aと圧接している。
【００６４】
次に、前記締付け機構31は、前記締付け移動部材23および閉塞嵌合部材25に対して、回動可能に軸支された細長形状の回動操作軸91を備えている。
【００６５】
この回動操作軸91は、一端となる下端に外周面にねじ溝が形成された略円柱状の螺合部92を有し、この螺合部92に連続して軸部93が形成され、この軸部93に連続してこの軸部93より径大な径大軸部94が形成されている。なお、この径大軸部94は、閉塞嵌合部材25の挿通孔65より大きい外径寸法となっており、一方、この螺合部92および軸部93は、閉塞嵌合部材25の挿通孔65、締付け移動部材23の挿通孔43より小さい寸法となっている。
【００６６】
また、この径大軸部94に連続して中空軸部96が設けられ、この中空軸部96には、回動操作軸91の他端となる上端に位置して、操作部95が設けられている。
【００６７】
そして、この回動操作軸91の螺合部92が、前記公共ドロップ桝本体１の上部側から前記閉塞嵌合部材25の挿通孔65および前記締付け移動部材23の挿通孔43に挿通して、この締付け移動部材23の螺合孔47に螺合されている。
【００６８】
また、この回動操作軸91の径大軸部94と前記閉塞嵌合部材25の肉厚中央部64との間には、ワッシャー98およびスラストリング99が挟持されている。さらに、この回動操作軸91の操作部95は、この操作部95に係合する図示しない適合工具にて回動操作されるようになっている。
【００６９】
さらに、前記締付け移動部材23の螺合孔47から下方に向って突出した回動操作軸91の螺合部92の先端部には、締付け移動部材23の抜け止め部100 が設けられている。この抜け止め部100 は、例えば、螺合部の先端部にピン取付け用孔を設け、このピン取付け用孔に、螺合孔47の直径より大きい長さ寸法を有するピン101 を取り付けることにより形成される。なお、この回動操作軸91、螺合孔47、ワッシャー98、スラストリング99等にて、締付け機構31が構成されている。
【００７０】
次に、上記一実施の形態の作用を説明する。
【００７１】
排水系の敷設は、例えば、宅地造成時に、宅地外の公道下に下水本管を敷設し、この下水本管から取付管17を分岐して、この取付管17を、ソケット15およびエルボ16を介して、公共ドロップ桝本体１の流出側接続口部５に接続する。また、公共ドロップ桝本体１の流入側接続口部３には、立上がり管８を接続し、開閉蓋９を設置する。
【００７２】
さらに、この立上がり管８の接続口部10には、図示しない閉塞具を着脱可能に取り付けて、この接続口部10を閉塞しておく。
【００７３】
また、公共ドロップ桝本体１内に配設した公共ドロップ桝用閉塞装置21にて、この公共ドロップ桝本体１の流出側接続口部５を閉塞する。
【００７４】
この公共ドロップ桝用閉塞装置21を公共ドロップ桝本体１内に取り付ける場合、まず、図１に示すように、被締付けリング部材27、閉塞嵌合部材25および締付け移動部材23を、公共ドロップ桝本体１内に上方から挿入し、閉塞嵌合部材25の嵌合筒部80を流出側接続口部５の内周面5aに嵌合する。この状態で、閉塞嵌合部材25の周縁部に突出形成した係止部83は、縮径段部４に係止した状態になり、公共ドロップ桝用閉塞装置21が、公共ドロップ桝本体１の流出側接続口部５に保持される。
【００７５】
次いで、回動操作軸91の操作部95を、公共ドロップ桝本体１の上部側から、適合工具を用いて回動操作する。
【００７６】
この操作部95の回動操作に基づき、締付け移動部材23の螺合孔47に、回動操作軸91の螺合部92が、螺合されつつ、締付け方向に回動する。この螺合部92の回動に伴い、締付け移動部材23が、閉塞嵌合部材25に向って移動する。すなわち、流出側接続口部５の上端部位置に嵌合された閉塞嵌合部材25に近接する方向である上方に向って移動する。
【００７７】
そして、この締付け移動部材23の移動により、被締付けリング部材27が、この締付け移動部材23と閉塞嵌合部材25とで締め付けられて、被締付けリング部材27の内周面である被押圧面が、締付け移動部材23の締付け縁部56の押圧面57に押されかつ閉塞嵌合部材25の締付け部76の押圧面77に押されて、この被締付けリング部材の外周面が膨出し、流出側接続口部５の内周面5aに圧接した状態で固定される。
【００７８】
この状態で、閉塞嵌合部材25が締付け移動部材23および被締付けリング部材27にて流出側接続口部５に保持されて、この保持された閉塞嵌合部材25により、図２に示すように、この流出側接続口部５が閉塞される。
【００７９】
そして、この公共ドロップ桝用閉塞装置21にて流出側接続口部５が閉塞された公共ドロップ桝本体１、立上がり管８等を、一旦、地中内に埋め戻す。
【００８０】
その後、宅地造成が完成し、建物が建築された後に、立上がり管８の接続口部近傍までを掘り下げて、この立上がり管８の接続口部10から、閉塞具を取り外し、この接続口部10に宅地内の建物からの排水を流す排水管12の末端を接続等する。
【００８１】
一方、公共ドロップ桝本体１の流出側接続口部５に取り付けた公共ドロップ桝用閉塞装置21は、適合工具を所有する下水道事業者等が、下水道施設の供用開始時期に取り外す。
【００８２】
すなわち、公共ドロップ桝本体１の流出側接続口部５を開放状態にする場合、立上がり管８に設置した開閉蓋９を開き、回動操作軸91の操作部95を適合工具を用いて、閉塞する場合とは逆方向に回動操作する。
【００８３】
この操作部95の回動操作に基づき、回動操作軸91の螺合部92が、締付け解除方向に回動する。この螺合部92の回動に伴い、締付け移動部材23が、閉塞嵌合部材25から離反する方向である下方に向って移動する。
【００８４】
そして、この締付け移動部材23の移動により、閉塞嵌合部材25と締付け移動部材23とによる被締付けリング部材27の締付けが解除され、この被締付けリング部材27の外周面が、流出側接続口部５の内周面5aから離れて、締付け移動部材23の周縁の圧接固定が解除される。そして、回動操作軸91を利用して、被締付けリング部材27、閉塞嵌合部材25および締付け移動部材23を公共ドロップ桝本体１外に取り出して、公共ドロップ桝本体１の流出側接続口部５を開放状態にする。
【００８５】
このようにして、上記一実施の形態によれば、被締付けリング部材27、閉塞嵌合部材25および締付け移動部材23を、公共ドロップ桝本体１内に挿入して、閉塞嵌合部材25が流出側接続口部５の内周面5aに嵌合し、締付け機構31の回動操作軸91の操作部95を適合工具で回動操作すると、締付け移動部材23が閉塞嵌合部材25に向って上方に移動し、この締付け移動部材23の移動により、被締付けリング部材27が閉塞嵌合部材25と締付け移動部材23とで締め付けられて、この被締付けリング部材27の外周面が、流出側接続口部５の内周面5aに強く圧接した状態で固定される。
【００８６】
したがって、従来の単に嵌合した状態で保持される栓体と比べ、閉塞嵌合部材25を容易に強く嵌合固定した状態に保持でき、公共ドロップ桝本体１の流出側接続口部５をこの閉塞嵌合部材25にて確実に閉塞でき、適合工具以外による回動操作軸91の操作部95の操作は困難であり、簡単にこの閉塞状態が解除されることがなく、無断で流出側接続口部５の閉塞状態が解除されることを防止できるので、未だ稼働していない下水処理場に排水が流れ込むこと、下水道施設が無断で利用されること等を確実に防止できる。
【００８７】
また、流出側接続口部５の閉塞状態から、締付け機構31の回動操作軸91の操作部95を、閉塞する場合とは逆方向に回動操作するのみで、締付け移動部材23を閉塞嵌合部材25から離反する方向である下方に向って移動させ、閉塞嵌合部材25と締付け移動部材23とによる被締付けリング部材27の締付けを解除させ、締付け移動部材23の周縁の圧接固定を解除できるので、簡単でかつ確実に公共ドロップ桝本体１の流出側接続口部５を開放でき、しかも、その回動操作軸91を利用することにより、公共ドロップ桝本体１の外へ容易に取り出すことができる。
【００８８】
さらに、閉塞嵌合部材25の周縁部に係止部83を突出形成するため、この閉塞嵌合部材25を流出側接続口部５の内周面5aに嵌合した状態では、この係止部83が縮径段部４に係止した状態となるので、公共ドロップ桝用閉塞装置21自体を容易に位置決めでき、しかも、流出側接続口部５より下方に落下することを防止できる。
【００８９】
また、閉塞嵌合部材25の嵌合筒部80の外周面に、テーパー面81を形成するため、挿入を容易にできるほか、この閉塞嵌合部材25の嵌合筒部80を流出側接続口部５の内周面5aに嵌合した状態では、このテーパー面81と流出側接続口部５の内周面5aとの間には、比較的大きな力が互いに作用し合うので、嵌合筒部80を流出側接続口部５の内周面5aに確実に密着嵌合でき、公共ドロップ桝用閉塞装置21自体を確実に位置決めでき、締付け機構31の回動操作軸91の操作部95の操作時における回動等を防止でき、操作性に優れている。
【００９０】
さらに、締付け移動部材23は回り止め規制孔49を有するとともに、閉塞嵌合部材25の閉塞基板部62に回り止め突起部66を突設するため、回動操作軸91の操作部95の操作時において、この回り止め突起部66は回り止め規制孔49にて、その回動が規制されるので、回動操作軸91とともに締付け移動部材23が回動することを簡単かつ確実に防止でき、操作性に優れている。
【００９１】
また、閉塞嵌合部材25および締付け移動部材23に、上下面に貫通した結露水排出用孔55，75をそれぞれ設けるため、生じた結露水は、この結露水排出用孔55，75をを流れて、公共ドロップ桝本体１の流出側接続口部５を通って、公共ドロップ桝本体１外へ排出される。よって、公共ドロップ桝本体１内に結露水が溜まることを防止できる。
【００９２】
さらに、回動操作軸91の先端部に、抜け止め部100 を設けるため、回動操作軸91の操作部95の操作時に、この抜け止め部100 にて回動操作軸91の回動操作が制限されるので、締付け移動部材23が回動操作軸91から抜け外れて、落下することを防止できる。
【００９３】
また、締付け機構31が締付け移動部材23の螺合孔47に螺合された螺合部92を下端に形成するとともに、操作部95を上端に形成した回動操作軸91を備えるため、構造を簡単にでき、容易に製造できる。
【００９４】
なお、上記実施の形態においては、閉塞嵌合部材25の係止部83は、嵌合筒部80の上周縁に全周にわたって突出形成した構成について説明したが、嵌合筒部80の上周縁の全周ではなく、上周縁の一部分に、例えば、等間隔をおいて３か所に突出形成した構成とすることもでき、この構成では、原材料を少なくでき、材料コストを低減できる。
【００９５】
また、上記実施の形態においては、公共ドロップ桝本体１の縮径段部４は、下方に向って縮径した傾斜面としたが、傾斜面とせず水平面とすることもできる。
【００９６】
さらに、上記実施の形態においては、公共ドロップ桝本体１の上部の開口部は、点検掃除口を兼ねる流入側接続口部３とした構成について説明したが、図４に示すように、公共ドロップ桝本体1aの上部の開口部は点検口部3aとしかつその公共ドロップ桝本体1aの管部２の周面に流入側接続口部110 を突出形成することもできる。なお、この点検口部3aには立上がり管8aを介して開閉蓋９を地表に面して設置し、また、流入側接続口部110 には宅地内の排水管12の末端を接続する。
【００９７】
そして、この図４に示す公共ドロップ桝本体1aについても、この公共ドロップ桝本体1a内に公共ドロップ桝用閉塞装置21を着脱可能に取り付けることで、この公共ドロップ桝本体1aの流出側接続口部５を無断に解除されない閉塞状態とできる。
【００９８】
【発明の効果】
請求項１記載の発明によれば、被締付けリング部材、閉塞嵌合部材および締付け移動部材を、公共ドロップ桝本体内に挿入して、閉塞嵌合部材を流出側接続口部の内周面に嵌合された状態で、締付け機構の操作部を操作すると、被締付けリング部材が閉塞嵌合部材と締付け移動部材とで締め付けられて、この被締付けリング部材の外周面が流出側接続口部の内周面に圧接するので、従来のように単に嵌合した状態で保持される栓体と比べ、閉塞嵌合部材を強く嵌合固定した状態に保持でき、公共ドロップ桝本体の流出側接続口部を閉塞嵌合部材にて確実に閉塞でき、簡単にこの閉塞状態が解除されることを防止できる。
【００９９】
請求項２記載の発明によれば、締付け機構が締付け移動部材の螺合孔に螺合された螺合部を一端に形成するとともに操作部を他端に形成した回動操作軸を備えるため、構造を簡単にでき、容易に製造できる。
【０１００】
請求項３記載の発明によれば、閉塞嵌合部材を流出側接続口部の内周面に嵌合した状態で、周縁部に突出した係止部が縮径段部に係止した状態となるので、公共ドロップ桝用閉塞装置自体を容易に位置決めでき、しかも、流出側接続口部より下方に落下することを防止できる。
【０１０１】
請求項４記載の発明によれば、閉塞嵌合部材の嵌合筒部の外周面をテーパー面に形成するため、挿入を容易にでき、この閉塞嵌合部材の嵌合筒部を流出側接続口部の内周面に嵌合した状態では、閉塞嵌合部材のテーパー面と流出側接続口部の内周面との間には、比較的大きな力が互いに作用し合うので、嵌合筒部を流出側接続口部の内周面に確実に密着嵌合でき、公共ドロップ桝用閉塞装置自体を確実に位置決めでき、締付け機構の操作部の操作時における回動等を防止できる。
【０１０２】
請求項５記載の発明によれば、回動操作軸の操作部の操作時に、この回り止め突起部は回り止め規制孔にてその回動が規制され、回動操作軸とともに締付け移動部材が回動することを簡単かつ確実に防止できる。
【０１０３】
請求項６記載の発明によれば、生じた結露水は、この結露水排出用孔を流れて、公共ドロップ桝本体の流出側接続口部を通って、公共ドロップ桝本体外へ排出される。よって、公共ドロップ桝本体内に結露水が溜まることを防止できる。
【０１０４】
請求項７記載の発明によれば、回動操作軸の操作部の操作時に、この抜け止め部にて回動操作軸の回動操作が制限され、締付け移動部材が回動操作軸から抜け外れて落下することを防止でき、操作性に優れている。
【図面の簡単な説明】
【図１】本発明の公共ドロップ桝用閉塞装置の一実施の形態を示す断面図である。
【図２】同上公共ドロップ桝用閉塞装置を示す公共ドロップ桝本体の流出側接続口部の閉塞状態における断面図である。
【図３】同上公共ドロップ桝用閉塞装置が取り付けられる公共ドロップ桝本体を含む排水系の側面図である。
【図４】同上公共ドロップ桝用閉塞装置が取り付けられる他の公共ドロップ桝本体を含む排水系の側面図である。
【符号の説明】
１，1a 公共ドロップ桝本体
３開口部としての流入側接続口部
3a 開口部としての点検口部
４縮径段部
５流出側接続口部
5a 内周面
21 公共ドロップ桝用閉塞装置
23 締付け移動部材
25 閉塞嵌合部材
27 被締付けリング部材
31 締付け機構
47 螺合孔
49 回り止め規制孔
55，75 結露水排出用孔
62 閉塞基板部
65 挿通孔
66 回り止め突起部
80 嵌合筒部
81 テーパー面
83 係止部
91 回動操作軸
92 螺合部
95 操作部
100 抜け止め部[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a public drop lid closing device that is detachably attached to a public drop lid body and closes an outflow side connection port of the public drop lid body.
[0002]
[Prior art]
Generally, the end of the drainage pipe in the residential land is connected to the main body of the public dredger, and this public dredging main body opens an outlet in the downward direction because of the height difference with the sewage main pipe laid under the public road outside the residential land. The formed public drop bag body is used.
[0003]
The public drop rod main body has a structure in which, for example, a large-diameter inflow side connection port portion is formed in the upper portion and a small-diameter outflow side connection port portion is formed in the lower portion through a reduced diameter step portion.
[0004]
And, the sewage main pipe is connected to the outflow side connection port of the public drop dredger body through an attachment pipe, etc., and the wastewater from the residential land is discharged from the drain pipe in the residential land, the rising pipe, the public drop dredger main body Then, it flows into the sewage main pipe through the attachment pipe and the like, and finally flows into the sewage treatment plant.
[0005]
Here, the drainage system is generally constructed by laying a sewage main pipe under a public road outside the premises, branching a mounting pipe from the sewage main pipe, and connecting the mounting pipe to the main body of the public drop fence. Connect to the outflow side connection. Next, an opening / closing lid is installed on the inflow side connection port portion of the public drop dredger main body communicating with the sewage main pipe through the attachment pipe so as to face the ground surface through the rising pipe. Then, a closure is removably attached to the connection port formed in the middle of the riser, and the connection port is closed with the closure, and then the riser, the public drop rod main body, etc. are temporarily backfilled. Keep it.
[0006]
After the construction of the residential land is completed and the building is built, it is dug down to the vicinity of the connecting port of the rising pipe, the obturator is removed from the connecting port of the rising pipe, and the drainage from the building in the residential land is drained to this connecting port. By connecting the end of the drainage pipe to be flown, the end of the drainage pipe in the residential land, the main body of the public drop dredge and the main sewage pipe are respectively communicated to complete the drainage system laying operation.
[0007]
However, in the above drainage system, the end of the drainage pipe in the residential land is connected to the sewage main pipe through the public drop dredge main body after the public drop dredge main body communicating with the sewage main pipe is buried and before the start of sewage use. In the case of communication, when drainage flows out from the residential land, this drainage flows from the drainage pipe in the residential land through the main body of the public drop dredge, etc., to the sewage main, and is not yet in operation. There is a problem that may flow into the sewage treatment plant.
[0008]
Even if the sewage treatment plant is in operation, if the end of the drainage pipe in the residential area is communicated to the sewage mains through the main body of the public drop without permission from the sewage service providers such as local governments, There is a problem that is used without permission.
[0009]
Conventionally, there has been known a method of closing an outflow side connection port portion of an embedded public drop dredge body using a drainage plug member described in Japanese Utility Model Publication No. 3-32617, for example.
[0010]
This drainage plug has an insertion tube portion that is inserted into the outflow side connection port portion, forms an annular fitting recess in which an elastic seal material is fitted to the outer peripheral portion of the insertion tube portion, and A structure is adopted in which the opening of the insertion tube is closed with a closed bottom lid having a handle on the outer surface.
[0011]
[Problems to be solved by the invention]
However, in the drainage jar plug described in Japanese Utility Model Publication No. 3-32617, it can be easily pulled out by grasping the handle portion of the bottom lid and pulling it toward the upper side of the public drop tub body. Therefore, there is a problem that the closed state is easily released.
[0012]
This invention is made in view of such a point, and it aims at providing the obstruction | occlusion apparatus for public drop dredging which prevents that the obstruction | occlusion state of the outflow side connection port part of a public drop dredger main body is easily cancelled | released. And
[0013]
[Means for Solving the Problems]
The closure device for public drop bottles according to claim 1 is detachably attached to a public drop bottle body having an opening formed in the upper part and an outflow side connection port part formed in the lower part. A closing device for a public drop bag for closing an outflow side connection port, which is fitted to an inner peripheral surface of the outflow side connection port of the public drop rod body and closes the outflow side connection port A tightening moving member that is disposed inside the outflow side connection port portion of the main body of the public drop rod so as to be movable toward and away from the closing fitting member; A tightening ring member disposed between the moving member and the closing fitting member, and an operation unit operated from an upper side of the public drop rod main body, and the tightening movement based on the operation of the operation unit The member is the closed fitting portion The tightened ring member is moved relative to the tightening ring member and the tightening moving member is tightened, and the outer peripheral surface of the tightened ring member is connected to the outflow side connection port portion of the public drop rod main body. And a tightening mechanism that presses the inner peripheral surface.
[0014]
When closing the outflow side connection port of the main body of the public drop rod, first, the tightened ring member is placed between the closing fitting member and the tightening moving member. The member and the tightening moving member are inserted into the public drop bag main body, and the closing fitting member is fitted to the inner peripheral surface of the outflow side connection port.
[0015]
Next, when the operation portion of the tightening mechanism is operated from the upper side of the public drop rod main body, the tightening moving member relatively moves toward the closing fitting member based on the operation of the operation portion.
[0016]
Then, by the movement of the tightening moving member, the tightened ring member is tightened by the tightening moving member and the closing fitting member, and the outer peripheral surface of the tightened ring member is brought to the inner peripheral surface of the outflow side connection port portion. Press contact.
[0017]
In this state, the closing fitting member is held by the tightening moving member and the tightened ring member, and the held closing fitting member closes the outflow side connection port portion of the public drop rod main body.
[0018]
The tightening moving member is moved relatively in the direction away from the closing fitting member by operating, for example, opposite to the case of closing the operating portion of the tightening mechanism, and the covering by the closing fitting member and the tightening moving member is performed. Release the tightening of the tightening ring member, release the pressure contact between the inner peripheral surface of the outflow side connection port and the outer peripheral surface of the tightened ring member, and remove the tightened ring member, closing fitting member and tightening moving member And open the outflow side connection port of the main body of the drop.
[0019]
The public drop rod closure device according to claim 2 is the public drop rod closure device according to claim 1, wherein the tightening mechanism is an insertion hole provided in the central portion of the closure fitting member from the upper side of the public drop rod body. And a screwing portion screwed into a screwing hole provided in the central portion of the tightening moving member is formed at one end and an operation portion operated from the upper side of the public drop rod main body is formed at the other end. A rotating operation shaft is provided.
[0020]
When the to-be-tightened ring member, the closing fitting member, and the tightening moving member are inserted into the public drop bag main body, the closing fitting member is fitted to the inner peripheral surface of the outflow side connection port.
[0021]
Next, when the operation portion of the rotation operation shaft is operated to rotate from the upper side of the public drop bag main body, the screwing portion of the rotation operation shaft rotates in the tightening direction based on the rotation operation of the operation portion, As the screwing portion rotates, the tightening moving member relatively moves toward the closing fitting member.
[0022]
Then, by the movement of the tightening moving member, the tightened ring member is tightened by the tightening moving member and the closing fitting member, and the outer peripheral surface of the tightened ring member is brought to the inner peripheral surface of the outflow side connection port portion. Press contact.
[0023]
In this state, the closing fitting member is held by the tightening moving member and the tightened ring member, and the held closing fitting member closes the outflow side connection port portion of the public drop rod main body.
[0024]
On the other hand, when opening the outflow side connection port of the public drop rod main body, this operation is performed when the operation part of the rotation operation shaft is rotated from the upper side of the public drop rod main body in the opposite direction to the case of closing. Based on the turning operation of the part, the screwing part of the turning operation shaft rotates in the tightening release direction. As the screwing portion rotates, the tightening moving member relatively moves in a direction away from the closing fitting member.
[0025]
The movement of the tightening moving member releases the tightening of the tightened ring member by the closing fitting member and the tightening moving member, and the outer peripheral surface of the tightened ring member is separated from the inner peripheral surface of the outflow side connection port. . Then, using the rotating operation shaft, the to-be-tightened ring member, the closing fitting member, and the tightening moving member are taken out from the public drop rod main body, and the outflow side connection port portion of the public drop rod main body is opened.
[0026]
According to a third aspect of the present invention, there is provided a closure device for public drop bottles according to the first or second aspect, wherein the main body of the public drop bottle has an opening at the top and a reduced diameter step at the bottom. An outflow side connection port portion having a smaller diameter than the upper opening portion is formed, and the closing fitting member is formed by protruding a locking portion locked to the reduced diameter step portion at a peripheral edge portion.
[0027]
When the to-be-tightened ring member, the closing fitting member, and the tightening moving member are inserted into the public drop rod main body and the closing fitting member is fitted to the inner peripheral surface of the small-diameter outflow side connection port portion, The locking part formed protruding from the peripheral edge of the combined member is locked to the reduced diameter step part.
[0028]
The public drop dredge closing device according to claim 4 is the public drop dredge closing device according to any one of claims 1 to 3, wherein the closing fitting member is provided in the outflow side connection port portion of the public drop dredge main body. It has a fitting cylinder part fitted to a peripheral surface, and the outer peripheral surface of this fitting cylinder part is formed in the taper surface expanded toward upper direction.
[0029]
When the to-be-tightened ring member is disposed between the closing fitting member and the tightening moving member, the tightening ring member, the closing fitting member, and the tightening moving member are inserted into the public drop bag main body, and then closed. A force directed inward from the inner peripheral surface of the outflow side connection port portion acts on the tapered surface of the fitting tube portion of the fitting member, and in this state, the fitting tube portion of the closing fitting member is connected to the outflow side. Fits closely to the inner peripheral surface of the mouth.
[0030]
The closure device for public drop bottles according to claim 5 is the closure device for public drop bottles according to any one of claims 2 to 4, wherein the tightening moving member has a rotation stop restricting hole penetrating the upper and lower surfaces, The closing fitting member has a closing substrate portion facing the tightening moving member, and the closing substrate portion is provided with an insertion hole through which the screwing portion of the rotation operation shaft is inserted in the central portion, and the peripheral portion is provided with the insertion hole. An anti-rotation protrusion that is inserted into the anti-rotation restricting hole of the tightening moving member so as to be movable in the vertical direction is projected.
[0031]
In the state where the tightened ring member is disposed between the closing fitting member and the tightening moving member, the screwing portion of the rotation operation shaft is inserted through the central portion of the closing substrate portion of the closing fitting member. It is in a state where it is inserted through the hole and screwed into a screw hole provided in the center of the tightening moving member.
[0032]
Further, in the state in which the screwing portion is screwed into the screwing hole, the rotation preventing projection portion protruding from the peripheral edge portion of the closing substrate portion of the closing fitting member is formed in the antirotation restricting hole of the tightening moving member in the vertical direction. It is in the state inserted so that movement was possible.
[0033]
When the operation portion of the rotation operation shaft is rotated after being inserted into the main body of the public drop bag, the rotation prevention projection is restricted by the rotation prevention hole. The tightening moving member is prevented from rotating together with the operation shaft.
[0034]
The public drop bag closing device according to claim 6 is the public drop bag closing device according to any one of claims 1 to 5, wherein the dew condensation penetrating through the upper and lower surfaces respectively on the closing fitting member and the tightening moving member. Condensed water discharge holes for water flow are provided.
[0035]
Condensed water such as water droplets generated by condensation flows through the condensed water discharge hole, and is discharged out of the public drop bottle main body through the outflow side connection port of the public drop bottle main body.
[0036]
The public drop rod closing device according to claim 7 is the public drop rod closing device according to any one of claims 2 to 6, wherein the public drop rod closing device is provided at the tip of the rotating operation shaft protruding from the screwing hole of the tightening moving member. Is provided with a retaining portion for the tightening moving member.
[0037]
When opening the outflow side connection port of the public drop rod main body, if the operation part of the rotation operation shaft is rotated in the direction opposite to the closing case, the screwing part of the rotation operation shaft will be in the tightening release direction. And the tightening moving member moves.
[0038]
When the tightening moving member is moved, the movement of the tightening moving member is restricted by the retaining portion provided at the tip of the rotating operation shaft. The operation is also limited, and the tightening moving member is prevented from falling off the rotating operation shaft.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of an embodiment of a public drop closure device according to the present invention will be described with reference to FIGS.
[0040]
1 to 3, reference numeral 1 denotes a public drop bowl body. The public drop bowl body 1 is formed of, for example, a synthetic resin such as vinyl chloride resin into a substantially cylindrical shape that is open in the vertical direction. Yes.
[0041]
In the upper part of the public drop rod main body 1, an inflow side connection port 3 as a large-diameter, substantially cylindrical opening having a larger outer diameter than the pipe 2 is continuous with the upper edge of the pipe 2. Is formed. This inflow side connection port portion 3 also serves as an inspection cleaning port.
[0042]
Further, at the lower portion of the public drop rod main body 1, a truncated conical diameter-reduced step portion 4 having a diameter reduced downward is formed continuously with the lower end periphery of the tube portion 2. Further, a substantially cylindrical outflow side connection port portion 5 having a smaller diameter than that of the inflow side connection port portion 3 is formed continuously from the lower end periphery of the reduced diameter step portion 4.
[0043]
As shown in FIG. 3, the public drop rod main body 1 is buried under the ground surface in a residential land, for example, and an opening / closing lid 9 is provided on the ground surface via a rising pipe 8 in the inflow side connection port portion 3. It is installed facing. Further, the rising pipe 8 has a connection port portion 10 formed so as to project at a substantially central portion in the longitudinal direction, and the end of the drain pipe 12 in the residential land is connected to the connection port portion 10.
[0044]
On the other hand, an attachment pipe 17 is connected to the outflow side connection port 5 of the public drop rod body 1 via a socket 15 and an elbow 16, and the tip of the attachment pipe 17 is connected to a sewage main pipe (not shown). Yes.
[0045]
And the drainage from the residential land flows from the drain pipe 12 in the residential land to the sewage main through the rising pipe 8, the public drop main body 1, the socket 15, the elbow 16, and the mounting pipe 17, and finally the sewage It is designed to flow into the treatment plant.
[0046]
In FIGS. 1 and 2, reference numeral 21 denotes a closing device for a public drop bag. This closing device 21 for a public drop bag has a closing movement member 23 and a closing fitting facing the clamping movement member 23 as shown in FIG. 1. A combined member 25, a tightening ring member 27 disposed between the closing fitting member 25 and the tightening moving member 23, and the tightening moving member 23 and the closing fitting member. And a tightening mechanism 31 for tightening with 25.
[0047]
The tightening moving member 23 is formed in a substantially circular plate shape with a synthetic resin such as vinyl chloride resin, and the outer diameter thereof is smaller than the inner diameter of the outflow side connection port portion 5 of the public drop main body 1. ing.
[0048]
The tightening moving member 23 has a circular substrate portion 41 having a substantially circular plate shape, an insertion hole 43 is provided above the thick central portion 42 of the circular substrate portion 41, and the circular substrate portion A screwing hole 47 is provided under the thick central portion 42 of 41 by embedding a hexagon nut 45, for example. The screw hole 47 and the insertion hole 43 are continuous and penetrate the upper and lower surfaces of the thick central portion 42.
[0049]
Further, in the vicinity of the periphery of the circular substrate portion 41, two anti-rotation restricting holes 49 penetrating the upper and lower surfaces are provided on a straight line including the central point of the circular substrate portion 41 and symmetrically from the central point. It has been.
[0050]
Further, a rib portion 50 is integrally projected on the lower surface of the circular substrate portion 41. The rib portion 50 includes, for example, four linear rib portions that are radially formed continuously with the thick central portion 42. 52 and one circular rib portion 53 formed coaxially with the thick central portion 42 by connecting intermediate portions of the four linear rib portions 52.
[0051]
Further, the circular substrate portion 41 is provided with a condensed water discharge hole 55 having a relatively small diameter penetrating the upper and lower surfaces.
[0052]
Furthermore, a frustoconical fastening edge 56 having a diameter expanding downward is integrally provided from the periphery of the circular substrate portion 41, and the outer peripheral surface of the fastening edge 56 is formed on the pressing surface 57. Yes.
[0053]
Next, the closing fitting member 25 is formed into a substantially circular shape with a synthetic resin such as vinyl chloride resin, and the outer diameter thereof is larger than the inner diameter of the outflow side connection port portion 5 of the public drop main body 1. It is a dimension.
[0054]
The closing fitting member 25 has a substantially circular plate-like closing substrate portion 62 positioned opposite to the circular substrate portion 41 of the tightening moving member 23, and a thick central portion 64 of the closing substrate portion 62. Is provided with an insertion hole 65 penetrating the upper and lower surfaces. The insertion hole 65 is formed with the same diameter as the insertion hole 43 provided in the thick central portion 42 of the circular substrate portion 41 of the tightening moving member 23.
[0055]
In addition, two detent projections 66 project downward from the peripheral edge of the closed substrate portion 62 on a straight line including the center point of the closed substrate portion 62 and symmetrically from the center point. Has been.
[0056]
The anti-rotation protrusion 66 is fitted into the two anti-rotation restricting holes 49 provided in the circular substrate 41 of the tightening moving member 23 so as to be movable in the vertical direction. Each of the anti-rotation projections 66 is formed in an elongated and hollow bottomed cylindrical shape.
[0057]
Further, a rib portion 70 is integrally projected from the upper surface of the closed substrate portion 62, and the rib portion 70 includes, for example, four linear rib portions that are radially formed continuously with the thick central portion 64. 72 and one circular rib portion 73 formed coaxially with the thick central portion 42 so as to connect intermediate portions of the four linear rib portions 52.
[0058]
Further, the closed substrate portion 62 is provided with a relatively small diameter condensed water discharge hole 75 penetrating the upper and lower surfaces at a position facing the condensed water discharge hole 55 provided in the circular substrate portion 41. .
[0059]
Further, a frustoconical tightening portion 76 whose diameter is expanded upward is integrally provided from the periphery of the closing substrate portion 62, and an outer peripheral surface of the tightening portion 76 is formed on the pressing surface 77.
[0060]
In addition, a short fitting cylinder portion 80 fitted to the inner peripheral surface 5a of the outflow side connection port portion 5 of the public drop rod main body 1 is provided integrally with the tightening portion 76, and this fitting is performed. A tapered surface 81 having an inclination angle of 2 °, for example, is formed on the outer peripheral surface of the combined cylinder portion 80 so as to expand upward. Further, on the outer peripheral edge of the fitting cylinder portion 80, for example, a locking portion 83 that is locked to the reduced diameter step portion 4 of the public drop rod main body 1 is formed to protrude outward over the entire circumference. Yes.
[0061]
Next, the tightened ring member 27 is formed in a substantially ring shape with an elastic material such as a synthetic rubber having a sealing property, and the outer diameter thereof is the inner diameter of the outflow side connection port portion 5 of the public drop main body 1. The dimensions are smaller.
[0062]
And the inner peripheral surface of this tightening ring member 27 is a pressed surface that is reduced in diameter toward the center, and in the closed state of the outflow side connection port 5 of the public drop rod main body 1 shown in FIG. The lower inclined surface of the pressed surface is in pressure contact with the pressing surface 57 of the tightening edge portion 56 of the tightening moving member 23, and the upper inclined surface of the pressed surface is the tightening portion of the closing fitting member 25. It is in pressure contact with 76 pressing surfaces 77.
[0063]
In addition, the outer peripheral surface of the tightened ring member 27 is the inside of the outflow side connection port portion 5 of the public drop rod main body 1 when the outflow side connection port portion 5 of the public drop rod main body 1 shown in FIG. Although separated from the peripheral surface 5a, in the closed state of the outflow side connection port portion 5 of the public drop rod main body 1 shown in FIG. 2, the tightened ring member 27 is connected to the tightening moving member 23 and the closing fitting member 25. It is deformed by being tightened, and is in pressure contact with the inner peripheral surface 5a of the outflow side connection port portion 5 of the public drop bag main body 1.
[0064]
Next, the tightening mechanism 31 includes an elongated rotation operation shaft 91 that is pivotally supported with respect to the tightening moving member 23 and the closing fitting member 25.
[0065]
The rotation operation shaft 91 has a substantially cylindrical threaded portion 92 having a thread groove formed on the outer peripheral surface at the lower end serving as one end, and a shaft portion 93 is formed continuously with the threaded portion 92. A large-diameter shaft portion 94 larger in diameter than the shaft portion 93 is formed continuously with the shaft portion 93. The large-diameter shaft portion 94 has an outer diameter larger than the insertion hole 65 of the closing fitting member 25, while the screwing portion 92 and the shaft portion 93 are inserted through the insertion hole of the closing fitting member 25. 65, which is smaller than the insertion hole 43 of the tightening moving member 23.
[0066]
Further, a hollow shaft portion 96 is provided continuously to the large-diameter shaft portion 94, and the hollow shaft portion 96 is provided with an operation portion 95 located at the upper end which is the other end of the rotation operation shaft 91. ing.
[0067]
Then, the screwing portion 92 of the turning operation shaft 91 is inserted from the upper side of the public drop rod main body 1 into the insertion hole 65 of the closing fitting member 25 and the insertion hole 43 of the tightening moving member 23, The tightening moving member 23 is screwed into the screw hole 47.
[0068]
Further, a washer 98 and a thrust ring 99 are sandwiched between the large-diameter shaft portion 94 of the rotation operation shaft 91 and the thick central portion 64 of the closing fitting member 25. Further, the operation unit 95 of the rotation operation shaft 91 is operated to be rotated by an appropriate tool (not shown) that engages with the operation unit 95.
[0069]
Further, a retaining portion 100 of the tightening moving member 23 is provided at the tip end of the screwing portion 92 of the rotation operating shaft 91 protruding downward from the screwing hole 47 of the tightening moving member 23. The retaining portion 100 is formed, for example, by providing a pin mounting hole at the tip of the screwing portion, and attaching a pin 101 having a length larger than the diameter of the screwing hole 47 to the pin mounting hole. Is done. The rotating mechanism shaft 91, the screwing hole 47, the washer 98, the thrust ring 99, and the like constitute the tightening mechanism 31.
[0070]
Next, the operation of the above embodiment will be described.
[0071]
For example, when drainage is laid, a sewage main pipe is laid under a public road outside the premises, and a mounting pipe 17 is branched from the sewage main pipe, and the mounting pipe 17 is connected to the socket 15 and the elbow 16. To the outflow side connection port 5 of the public drop bag main body 1. In addition, a rising pipe 8 is connected to the inflow side connection port 3 of the public drop rod main body 1 and an open / close lid 9 is installed.
[0072]
Further, a closing tool (not shown) is detachably attached to the connection port portion 10 of the rising pipe 8 so that the connection port portion 10 is closed.
[0073]
Further, the outflow side connection port 5 of the public drop basket main body 1 is closed by the public drop bottle closing device 21 disposed in the public drop basket main body 1.
[0074]
When installing the public drop rod closure device 21 in the public drop rod body 1, first, as shown in FIG. 1, the tightened ring member 27, the block fitting member 25 and the tightening moving member 23 are connected to the public drop rod body. 1 is inserted from above, and the fitting cylinder portion 80 of the closing fitting member 25 is fitted to the inner peripheral surface 5 a of the outflow side connection port portion 5. In this state, the locking portion 83 protruding from the peripheral edge of the closing fitting member 25 is locked to the reduced diameter step portion 4, and the public drop rod closing device 21 is connected to the public drop rod body 1. It is held in the outflow side connection port 5.
[0075]
Next, the operation unit 95 of the rotation operation shaft 91 is rotated from the upper side of the public drop rod main body 1 using an appropriate tool.
[0076]
Based on the turning operation of the operating portion 95, the screwing portion 92 of the turning operation shaft 91 is screwed into the screwing hole 47 of the tightening moving member 23 and is turned in the tightening direction. As the screwing portion 92 rotates, the tightening moving member 23 moves toward the closing fitting member 25. That is, it moves upward, which is a direction close to the closing fitting member 25 fitted to the position of the upper end portion of the outflow side connection port portion 5.
[0077]
Then, by the movement of the tightening moving member 23, the tightened ring member 27 is tightened by the tightening moving member 23 and the closing fitting member 25, and the pressed surface which is the inner peripheral surface of the tightened ring member 27 is changed. The outer peripheral surface of the tightened ring member bulges by being pressed by the pressing surface 57 of the tightening edge portion 56 of the tightening moving member 23 and pressed by the pressing surface 77 of the tightening portion 76 of the closing fitting member 25, and the outflow side It is fixed in a state where it is in pressure contact with the inner peripheral surface 5 a of the connection port 5.
[0078]
In this state, the closing fitting member 25 is held in the outflow side connection port 5 by the tightening moving member 23 and the tightened ring member 27, and the held closing fitting member 25 causes the holding fitting member 25 to hold as shown in FIG. The outflow side connection port 5 is closed.
[0079]
Then, the public drop rod main body 1, the rising pipe 8 and the like whose outflow side connection port 5 is blocked by the public drop rod closing device 21 are once buried back into the ground.
[0080]
Thereafter, after the building of the residential land is completed and the building is constructed, the vicinity of the connecting port portion of the rising pipe 8 is dug down, and the obturator is removed from the connecting port portion 10 of the rising pipe 8. The end of the drain pipe 12 that drains the waste water from the building in the residential land is connected.
[0081]
On the other hand, the public drop dredge closing device 21 attached to the outflow side connection port 5 of the public drop dredge main body 1 is removed by a sewer company or the like who owns the appropriate tool at the start of service of the sewer facility.
[0082]
That is, when the outflow side connection port portion 5 of the public drop rod main body 1 is opened, the opening / closing lid 9 installed on the rising pipe 8 is opened, and the operation portion 95 of the rotation operation shaft 91 is closed using an appropriate tool. Rotation operation is performed in the opposite direction to the case of performing.
[0083]
Based on the rotation operation of the operation unit 95, the screwing portion 92 of the rotation operation shaft 91 rotates in the tightening release direction. As the screwing portion 92 rotates, the tightening moving member 23 moves downward, which is a direction away from the closing fitting member 25.
[0084]
Then, the movement of the tightening moving member 23 releases the tightening of the tightened ring member 27 by the closing fitting member 25 and the tightening moving member 23, and the outer peripheral surface of the tightened ring member 27 is connected to the outflow side connection port portion. 5, away from the inner peripheral surface 5 a, the press-fixing of the peripheral edge of the tightening moving member 23 is released. Then, using the rotation operation shaft 91, the tightened ring member 27, the closing fitting member 25 and the tightening moving member 23 are taken out from the public drop rod body 1, and the outflow side connection port portion of the public drop rod body 1 5 is opened.
[0085]
Thus, according to the above-described embodiment, the tightened ring member 27, the closing fitting member 25, and the tightening moving member 23 are inserted into the public drop rod body 1, and the closing fitting member 25 flows out. When the fitting portion is fitted to the inner peripheral surface 5a of the side connection port portion 5 and the operation portion 95 of the turning operation shaft 91 of the tightening mechanism 31 is turned with an appropriate tool, the tightening moving member 23 faces the closing fitting member 25. By moving the tightening moving member 23, the tightening ring member 27 is tightened by the closing fitting member 25 and the tightening moving member 23, and the outer peripheral surface of the tightening ring member 27 is connected to the outflow side. It is fixed in a state where it is strongly pressed against the inner peripheral surface 5a of the mouth portion 5.
[0086]
Therefore, compared to the conventional plug body that is simply fitted, the closure fitting member 25 can be easily held in a strongly fitted and fixed state, and the outflow side connection port portion 5 of the public drop main body 1 can be The closing fitting member 25 can reliably close the device, and it is difficult to operate the operating portion 95 of the rotary operation shaft 91 other than the compatible tool. Since it is possible to prevent the closed state of the mouth portion 5 from being released, it is possible to reliably prevent drainage from flowing into a sewage treatment plant that is not yet in operation, use of a sewer facility without permission, and the like.
[0087]
Further, from the closed state of the outflow side connection port portion 5, the tightening moving member 23 is closed and fitted only by rotating the operation portion 95 of the rotation operation shaft 91 of the tightening mechanism 31 in the opposite direction to the case of closing. Move to the downward direction, which is the direction away from the joint member 25, release the tightening of the tightened ring member 27 by the closing fitting member 25 and the tightening moving member 23, and release the press-fixing of the peripheral edge of the tightening moving member 23 Therefore, the outflow side connection port 5 of the public drop basket body 1 can be easily and reliably opened, and can be easily taken out of the public drop basket body 1 by using the rotation operation shaft 91. Can do.
[0088]
Furthermore, in order to form the locking portion 83 at the peripheral edge of the closing fitting member 25, the locking portion 25 is fitted in the state where the closing fitting member 25 is fitted to the inner peripheral surface 5 a of the outflow side connection port portion 5. Since 83 is locked to the reduced diameter step portion 4, the public drop lid closing device 21 itself can be easily positioned, and can be prevented from falling below the outflow side connection port portion 5.
[0089]
Further, since the tapered surface 81 is formed on the outer peripheral surface of the fitting tube portion 80 of the closing fitting member 25, the insertion can be facilitated, and the fitting tube portion 80 of the closing fitting member 25 is connected to the outflow side connection port. In a state of being fitted to the inner peripheral surface 5a of the portion 5, a relatively large force acts between the tapered surface 81 and the inner peripheral surface 5a of the outflow side connection port portion 5. The portion 80 can be securely fitted and fitted to the inner peripheral surface 5a of the outflow side connection port portion 5, the public drop rod closing device 21 itself can be reliably positioned, and the operating portion 95 of the rotating operation shaft 91 of the tightening mechanism 31 can be It can prevent rotation during operation and has excellent operability.
[0090]
Further, the tightening moving member 23 has a rotation preventing restricting hole 49 and a rotation preventing projection 66 protruding from the closing substrate 62 of the closing fitting member 25, so that the operating portion 95 of the rotating operation shaft 91 is operated. Since the rotation of the anti-rotation protrusion 66 is restricted by the anti-rotation restricting hole 49, the rotation of the tightening moving member 23 together with the rotation operation shaft 91 can be easily and reliably prevented. Excellent in properties.
[0091]
Further, since the condensate fitting member 25 and the tightening moving member 23 are provided with condensed water discharge holes 55 and 75 penetrating the upper and lower surfaces, the generated condensed water flows through the condensed water discharge holes 55 and 75. Then, it passes through the outflow side connection port 5 of the public drop basket body 1 and is discharged out of the public drop basket body 1. Therefore, it is possible to prevent the condensed water from accumulating in the public drop basket main body 1.
[0092]
Further, since the retaining portion 100 is provided at the tip of the rotational operation shaft 91, the rotational operation shaft 91 can be rotated by the retaining portion 100 when the operation portion 95 of the rotational operation shaft 91 is operated. Therefore, it is possible to prevent the tightening moving member 23 from being detached from the rotation operation shaft 91 and falling.
[0093]
In addition, the tightening mechanism 31 has a screwing portion 92 screwed into the screwing hole 47 of the tightening moving member 23 at the lower end and a rotation operation shaft 91 with the operation portion 95 formed at the upper end. Can be simple and easy to manufacture.
[0094]
In the above embodiment, the engaging portion 83 of the closing fitting member 25 has been described so as to protrude from the upper peripheral edge of the fitting cylindrical portion 80 over the entire periphery. For example, it is possible to adopt a configuration in which a part of the upper peripheral edge is not formed on the entire periphery of the substrate, but is formed to protrude at three locations at equal intervals. With this configuration, raw materials can be reduced, and the material cost can be reduced.
[0095]
Moreover, in the said embodiment, although the diameter reduction step part 4 of the public drop basket main body 1 was made into the inclined surface diameter-reduced toward the downward direction, it can also be made into a horizontal surface instead of an inclined surface.
[0096]
Furthermore, in the said embodiment, although the opening part of the upper part of the public drop basket main body 1 demonstrated the structure made into the inflow side connection port part 3 which doubles as an inspection cleaning port, as shown in FIG. The opening at the top of the main body 1a can be used as an inspection port portion 3a, and an inflow side connection port portion 110 can be formed to protrude from the peripheral surface of the pipe portion 2 of the public drop rod main body 1a. An opening / closing lid 9 is installed on the inspection port 3a through the rising pipe 8a so as to face the ground surface, and the end of the drain pipe 12 in the residential land is connected to the inflow side connection port 110.
[0097]
And also about the public drop bag main body 1a shown in this FIG. 4, the outflow side connection port part of this public drop bottle main body 1a is attached to the public drop bottle main body 1a in a detachable manner. 5 can be in a closed state that cannot be released without permission.
[0098]
【The invention's effect】
According to the first aspect of the present invention, the to-be-tightened ring member, the closing fitting member and the tightening moving member are inserted into the public drop rod main body, and the closing fitting member is fitted to the inner peripheral surface of the outflow side connection port. When the operating portion of the tightening mechanism is operated in the joined state, the tightened ring member is tightened by the closing fitting member and the tightening moving member, and the outer peripheral surface of the tightened ring member is in the outflow side connection port portion. Because it is in pressure contact with the peripheral surface, the closure fitting member can be held in a strongly fitted and fixed state compared to a plug body that is held in a fitted state as in the prior art, and the outflow side connection port part of the public drop rod body Can be reliably closed by the closing fitting member, and it is possible to easily prevent the closed state from being released.
[0099]
According to the invention described in claim 2, since the tightening mechanism includes a rotating operation shaft in which the screwing portion screwed into the screwing hole of the tightening moving member is formed at one end and the operation portion is formed in the other end. The structure can be simplified and manufactured easily.
[0100]
According to the invention of claim 3, in a state where the closing fitting member is fitted to the inner peripheral surface of the outflow side connection port portion, the locking portion protruding to the peripheral edge is locked to the reduced diameter step portion; Thus, the public drop closure device itself can be easily positioned, and can be prevented from falling below the outflow side connection port.
[0101]
According to the invention described in claim 4, since the outer peripheral surface of the fitting tube portion of the closing fitting member is formed into a tapered surface, insertion can be facilitated, and the fitting tube portion of the closing fitting member is connected to the outflow side. In a state of being fitted to the inner peripheral surface of the mouth portion, a relatively large force acts between the tapered surface of the closing fitting member and the inner peripheral surface of the outflow side connection mouth portion. The part can be tightly fitted to the inner peripheral surface of the outflow side connection port part, the public drop rod closing device itself can be reliably positioned, and rotation or the like during operation of the operation part of the tightening mechanism can be prevented.
[0102]
According to the fifth aspect of the present invention, when the operation portion of the rotation operation shaft is operated, the rotation prevention protrusion is restricted by the rotation prevention hole, and the tightening movement member rotates together with the rotation operation shaft. It can be easily and reliably prevented from moving.
[0103]
According to the sixth aspect of the present invention, the generated condensed water flows through the condensed water discharge hole, and is discharged out of the public drop bottle main body through the outflow side connection port portion of the public drop bottle main body. Therefore, it is possible to prevent the condensed water from accumulating in the public drop basket main body.
[0104]
According to the seventh aspect of the present invention, when the operation portion of the rotation operation shaft is operated, the rotation operation of the rotation operation shaft is restricted by the retaining portion, and the tightening moving member is detached from the rotation operation shaft. It can be prevented from falling and has excellent operability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a closure device for a public drop bag according to the present invention.
FIG. 2 is a cross-sectional view in the closed state of the outflow side connection port portion of the public drop bottle main body showing the public drop bottle closure device.
FIG. 3 is a side view of a drainage system including a public drop dredge body to which the same public drop dredge closing device is attached.
FIG. 4 is a side view of a drainage system including another public drop rod main body to which the same public drop rod closing device is attached.
[Explanation of symbols]
1,1a Public drop wall
3 Inlet side connection port as opening
3a Inspection port as an opening
4 Reduced diameter step
5 Outlet connection port
5a Inner surface
21 Occlusion device for public drop dredging
23 Tightening moving member
25 Blocking mating member
27 Clamped ring member
31 Tightening mechanism
47 Screw hole
49 Non-rotating restriction hole
55, 75 Condensate drain hole
62 Blocking substrate
65 Insertion hole
66 Anti-rotation protrusion
80 Mating cylinder
81 Tapered surface
83 Locking part
91 Rotating operation shaft
92 threaded part
95 Operation section
100 Retaining part

Claims

A public drop rod closure that is detachably attached to a public drop rod main body having an opening at the top and an outflow side connection port formed at the bottom, and blocks the outflow side connection port of the public drop rod body. A device,
A closing fitting member that is fitted to the inner peripheral surface of the outflow side connection port portion of the public drop bag main body and closes the outflow side connection port portion,
A tightening moving member that is disposed inside the outflow side connection port portion of the public drop rod main body so as to be movable toward and away from the closing fitting member;
A tightened ring member disposed between the tightening moving member and the closing fitting member;
The operation part is operated from the upper side of the public drop rod main body, and based on the operation of the operation part, the tightening moving member is moved relatively toward the closing fitting member to move the tightened ring member And a tightening mechanism for tightening the closing fitting member and the tightening moving member to press-contact the outer peripheral surface of the tightened ring member to the inner peripheral surface of the outflow side connection port of the public drop rod main body. A closure device for public drop dredges.

The tightening mechanism is inserted into the insertion hole provided in the central part of the closing fitting member from the upper side of the public drop rod main body and is screwed into the screwing hole provided in the central part of the tightening moving member. The closure device for a public drop rod according to claim 1, further comprising a pivoting operation shaft formed at the other end of the public drop rod main body and having an operation portion operated at the other end.

The public drop bag main body forms an opening on the upper part and an outlet side connection port part having a smaller diameter than the opening on the upper part through a reduced diameter step part on the lower part.
The closure device for a public drop bag according to claim 1 or 2, wherein the closure fitting member is formed by protruding a locking portion locked to the reduced diameter step portion at a peripheral edge portion.

The closure fitting member has a fitting cylinder portion fitted to the inner peripheral surface of the outflow side connection port portion of the public drop bag main body,
The closure device for a public drop bag according to any one of claims 1 to 3, wherein the outer peripheral surface of the fitting tube portion is formed as a tapered surface that expands upward.

The tightening movement member has a detent restriction hole penetrating the upper and lower surfaces,
The closing fitting member has a closing substrate portion facing the tightening moving member,
The closing substrate portion is provided with an insertion hole through which the screwing portion of the rotation operation shaft is inserted in the center portion, and is fitted around the peripheral portion so as to be movable in the vertical direction in the rotation preventing restriction hole of the tightening movement member. 5. A closure device for a public drop bag according to any one of claims 2 to 4, wherein a stop projection is provided in a protruding manner.

6. The closure for a public drop bottle according to any one of claims 1 to 5, wherein the closure fitting member and the tightening moving member are provided with a dew condensation water discharge hole through which dew condensation water penetrating the upper and lower surfaces respectively. apparatus.

The public drop rod according to any one of claims 2 to 6, wherein a retaining portion for the tightening / moving member is provided at a tip of the rotation operation shaft protruding from the screwing hole of the tightening / moving member. Occlusion device.