JP2017155455A

JP2017155455A - Drain piping

Info

Publication number: JP2017155455A
Application number: JP2016038383A
Authority: JP
Inventors: 大輔服部; Daisuke Hattori
Original assignee: Maruichi Corp
Current assignee: Maruichi Corp
Priority date: 2016-02-29
Filing date: 2016-02-29
Publication date: 2017-09-07
Anticipated expiration: 2036-02-29
Also published as: JP6936423B2

Abstract

PROBLEM TO BE SOLVED: To provide drain piping that comprises a drain port and a side drain port and has piping from the side drain port connected to piping of the drain port and that easily and securely prevent an air bubble from the side drain port from flowing backward when waste water including the air bubble is discharged from the drain port.SOLUTION: Drain piping for a tank body consisting of a drain port provided at a bottom of the tank body, a side drain port provided on a side face of the tank body, a main drain pipe for discharging waste water from the drain port to a sewage side, and a branch drain pipe for discharging the waste water from the side drain port to a halfway part of the main drain pipe comprises a check valve which is normally closed to prevent an air bubble from flowing backward from the drain port at the side drain port, and is opened only when waste water is discharged from the side drain port to allow the waste water to flow toward the main drain pipe.SELECTED DRAWING: Figure 2

Description

本発明は、槽体の排水配管に関するものであって、槽体底面に設けられた排水口からの排水を行う主排水管と、槽体側面に設けられた側面排水口からの排水を行う枝排水管と、からなる排水配管において、側面排水口に排水中の泡が逆流することを防ぐ機能を備えた排水配管に関するものである。 The present invention relates to a drainage pipe for a tank body, and includes a main drain pipe for draining from a drain port provided on the bottom surface of the tank body, and a branch for draining from a side drain port provided on a side surface of the tank body. The present invention relates to a drainage pipe having a function of preventing bubbles in drainage from flowing backward to a side drainage port in a drainage pipe comprising a drainage pipe.

従来より、洗面台や流し台、浴槽などの槽体に対して、槽体内部の吐水を排出するために、槽体の底面に排水口を設け、この排水口からパイプ管等からなる主排水管を介し、下水側に繋がる床下配管へ排水を行う構造が知られている。また、上記槽体において、必要に応じ、排水口を閉塞して槽体内に吐水を溜める場合がある。この場合に、槽体内に継続して吐水を行うと、最終的には槽体上縁から槽体内の吐水が溢れてしまうため、特許文献１に記載の槽体のように、槽体の側面であって上縁近傍に側面排水口を設けて、この側面排水口から槽体内の排水を排出し、吐水が溢れることを防止する構造も良く知られている。
上記側面排水口からの配管は、ホース管等を利用した枝排水管を介して槽体底面の排水口から床下配管に繋がる主排水管に略Ｔ字形状を成す枝付き管を利用して枝管接続するように構成され、これにより、槽体内の吐水は、側面排水口、枝排水管、枝付き管、主排水管の順に流れ、最終的には下水側の床下配管に排出することができる。
尚、この特許文献１に記載の排水配管においては、枝付き管の上下に延出された縦管部の内部に排水口からの配管を同心円状に収納してなり、排水口からの配管の側面に設けた開口を介して、枝排水管からの排水を主排水管に流入するように構成してなる。 Conventionally, in order to discharge the water discharged from the inside of the tank body to a tank body such as a wash basin, a sink, and a bathtub, a drain outlet is provided on the bottom surface of the tank body, and a main drain pipe comprising a pipe pipe or the like from this drain outlet. There is a known structure that drains water to the underfloor pipe connected to the sewage side through the sewage. Moreover, in the said tank body, a drain outlet may be obstruct | occluded as needed and water discharge may be collected in the tank body. In this case, if water is continuously discharged into the tank body, the water discharge in the tank body eventually overflows from the upper edge of the tank body, so that the side surface of the tank body as in the tank body described in Patent Document 1. A structure is also well known in which a side drain is provided in the vicinity of the upper edge, and the drainage in the tank is discharged from the side drain to prevent the water discharge from overflowing.
The pipe from the side drain outlet is branched using a branch pipe having a substantially T-shape to the main drain pipe connected from the drain outlet on the bottom of the tank body to the underfloor pipe via the branch drain pipe using a hose pipe or the like. It is configured to connect to the pipe, so that the water discharge in the tank flows in the order of the side drainage port, the branch drainage pipe, the branch pipe, and the main drainage pipe, and is finally discharged to the underfloor pipe on the sewage side. it can.
In addition, in the drainage pipe described in this Patent Document 1, the pipe from the drainage port is concentrically accommodated inside the vertical pipe part that extends up and down the branch pipe, and the pipe from the drainage port is The drainage from the branch drainage pipe is configured to flow into the main drainage pipe through the opening provided on the side surface.

特開２００９−７４２５０号JP 2009-74250 A

上記のような特許文献１に記載の槽体の排水配管の場合、以下に記載するような問題点があった。
槽体内からの排水には、石鹸や洗剤などに由来する泡が混じる場合が多い。洗面台の場合では手洗いや一部の洗濯物のうち汚れの激しい部位の汚れを取り去る為に特に洗面台で洗う場合があり、この時の石鹸や洗剤に由来する泡が排水に混じる場合がある。また、流し台の場合では、食器を洗った際の洗剤に由来する泡が排水に混じる場合がある。
また、浴槽の場合には入浴後に、浴槽内を洗う場合に使用した洗剤に由来する泡が排水に混じる場合がある。
これらの泡混じりの排水も、上記したように、槽体底面の排水口から主排水管を介して下水側に繋がる床下配管に排出が行われるが、この際に、排水に比べて比重が軽い泡が、主配管内部に留まり、更には枝付き管及び枝排水管を介して側面排水口から槽体内に逆流を生じる場合があった。
上記問題点を解決するため、特許文献１に記載の発明では、排水口からの配管の側面に設けた開口を閉塞する可動式の壁面を設け、排水口が開口するときは壁面により側面排水口からの排水流路を閉口するようにし、上記した泡の逆流の防止を行っている。
しかしながら、上記特許文献１に記載の発明では、排水口を成す管体内面に、可動式の壁面が接しながら上下動するため、摩擦が大きくなり、可動式の壁面の動作が困難である、という問題があった。
また、排水口を閉口する蓋部材に、可動式の壁面を連動するように構成したため、可動式の壁面の動作に不具合が生じると、そのまま蓋部材の排水口への閉口にも不具合が生じ、排水口から漏水が生じる、といった問題があった。
本発明は上記問題点に鑑み発明されたものであって、排水口からの配管に、側面排水口からの配管を接続した排水配管において、排水口から泡まじりの排水を流した場合に、側面排水口から泡が逆流することを容易且つ確実に防止する排水配管に関するものである。 In the case of the drainage pipe of the tank body described in Patent Document 1 as described above, there are problems as described below.
In many cases, the wastewater from the tank is mixed with bubbles derived from soap or detergent. In the case of a wash basin, there is a case where it is washed with a wash basin in order to remove dirt on a heavily soiled part of hand washing or some laundry, and bubbles derived from soap and detergent at this time may be mixed with drainage . Moreover, in the case of a sink, the foam derived from the detergent at the time of washing tableware may mix with waste water.
Moreover, in the case of a bathtub, the foam derived from the detergent used when wash | cleaning the inside of a bathtub after bathing may mix with waste_water | drain.
As described above, drainage mixed with bubbles is also discharged from the drainage port on the bottom of the tank body to the underfloor pipe connected to the sewage side via the main drainage pipe. At this time, the specific gravity is lighter than the drainage. In some cases, the foam stayed inside the main pipe, and further, a back flow occurred from the side drainage port into the tank through the branch pipe and the branch drainage pipe.
In order to solve the above problems, in the invention described in Patent Document 1, a movable wall surface that closes an opening provided on the side surface of the pipe from the drain port is provided, and when the drain port opens, the side surface drain port is opened by the wall surface. The drainage flow path from the outlet is closed to prevent the above-described reverse flow of bubbles.
However, in the invention described in Patent Document 1, since the movable wall surface moves up and down while contacting the inner surface of the tubular body forming the drain port, the friction increases and it is difficult to operate the movable wall surface. There was a problem.
In addition, since the movable wall surface is interlocked with the lid member that closes the drain port, if a malfunction occurs in the operation of the movable wall surface, the lid member also has a malfunction in closing the drain port, There was a problem that water leaked from the drain.
The present invention has been invented in view of the above problems, and in a drainage pipe in which a pipe from a side drainage port is connected to a pipe from a drainage port, when foamed wastewater flows from the drainage port, The present invention relates to a drainage pipe for easily and reliably preventing bubbles from flowing backward from a drainage port.

請求項１に記載の本発明は、槽体の底面に設けられた排水口と、槽体の側面に設けられた側面排水口と、排水口からの排水を下水側に排出する主排水管と、側面排水口からの排水を主排水管の途中部分に排出する枝排水管と、からなる槽体の排水配管において、
常時閉塞して排水口からの泡の逆流が側面排水口に生じることを防止すると共に、側面排水口から排水を生じた場合のみ開口して主排水管側への通水を行う逆流防止弁を備えたことを特徴とする排水配管である。 The present invention described in claim 1 includes a drain port provided on the bottom surface of the tank body, a side drain port provided on the side surface of the tank body, and a main drain pipe for discharging drainage from the drain port to the sewage side. In the drainage pipe of the tank body consisting of the branch drainage pipe that discharges the drainage from the side drainage port to the middle part of the main drainage pipe,
A backflow prevention valve that is always closed to prevent backflow of bubbles from the drainage outlet to the side drainage outlet and opens only when drainage is generated from the side drainage outlet and allows water to flow to the main drainage pipe side. It is the drainage piping characterized by having provided.

請求項２に記載の本発明は、上記排水配管において、逆流防止弁を、側面排水口内又は枝排水管内に備えたことを特徴とする排水配管である。 According to a second aspect of the present invention, in the above drainage pipe, a backflow prevention valve is provided in the side drainage port or the branch drainage pipe.

請求項３に記載の本発明は、上記排水配管において、
主排水管上に設けられるか、又は主排水管に沿って設けられる管体である主管部、該主管部の側面から延出された枝管部、からなる枝付き管を備え、枝付き管の主管部は主排水管側に、枝管部は側面排水口からの配管に、それぞれ接続されると共に、枝管部内に逆流防止弁を備えたことを特徴とする、請求項１又は請求項２に記載の排水配管である。 According to a third aspect of the present invention, in the drain pipe,
A branch pipe having a branch pipe comprising a main pipe portion which is a pipe provided on or along the main drain pipe, and a branch pipe portion extending from a side surface of the main pipe portion. The main pipe part is connected to the main drain pipe side, the branch pipe part is connected to the pipe from the side drain outlet, and a backflow prevention valve is provided in the branch pipe part. 2. The drainage pipe according to 2.

請求項４に記載の本発明は、上記排水配管において、
主排水管上に設けられるか、又は主排水管に沿って設けられる管体である主管部、該主管部の側面から延出された枝管部、からなる枝付き管を備え、枝付き管の主管部は主排水管側に、枝管部は側面排水口からの配管に、それぞれ接続されると共に、枝管部の端部に、逆流防止弁を備えた継手管を接続することを特徴とする、請求項１又は請求項２に記載の排水配管である。 According to a fourth aspect of the present invention, in the drain pipe,
A branch pipe having a branch pipe comprising a main pipe portion which is a pipe provided on or along the main drain pipe, and a branch pipe portion extending from a side surface of the main pipe portion. The main pipe part is connected to the main drain pipe side, the branch pipe part is connected to the pipe from the side drain outlet, and a joint pipe equipped with a backflow prevention valve is connected to the end of the branch pipe part. The drainage pipe according to claim 1 or claim 2.

請求項５に記載の本発明は、上記排水配管において、
逆流防止弁は、板状の弁体と、該弁体を管体に対して回動自在に取り付けられるヒンジ部と、管体に備えられた、弁体が当接する弁座部と、からなり、通常時は弁体が管体内面に接して、逆流した排水や排水中の泡の通過を防止すると共に、排水時には管体内面から離間して側面排水口からの排水や排水中の泡を通過させて排水を行うことを特徴とする、請求項１乃至請求項４のいずれか一つに記載の排水配管である。 The present invention according to claim 5 is the drainage pipe,
The backflow prevention valve is composed of a plate-shaped valve body, a hinge portion on which the valve body is rotatably attached to the tube body, and a valve seat portion provided on the tube body and in contact with the valve body. Normally, the valve body contacts the inner surface of the pipe to prevent the passage of backflow drainage and bubbles in the drainage, and at the time of drainage, the valve body is separated from the inner surface of the pipe and drains from the side drainage port and bubbles in the drainage. The drainage pipe according to any one of claims 1 to 4, wherein drainage is performed through the drainage pipe.

請求項６に記載の本発明は、上記排水配管において、
逆流防止弁を備えた管体が、他の枝排水管の部材に対して着脱自在に構成され、着脱により開放された箇所から弁体を枝排水管外に取り出し可能に構成したことを特徴とする、請求項に記載の排水配管である。 The present invention according to claim 6 is the drainage pipe,
The pipe body provided with the backflow prevention valve is configured to be detachable with respect to other branch drainage pipe members, and the valve body can be taken out of the branch drainage pipe from a position opened by the detachment. The drainage pipe according to claim.

請求項７に記載の本発明は、上記排水配管において、
逆流防止弁の弁体の開き角度に制限を行い、弁体を通過した排水が、弁体に対向する管体の壁面に対して略４５度よりも小さい角度にて衝突するようにしたことを特徴とする、請求項１乃至請求項６のいずれか一つに記載の排水配管である。 The present invention according to claim 7 is the drainage pipe,
The opening angle of the valve body of the backflow prevention valve is limited so that the drainage that has passed through the valve body collides with the wall surface of the pipe body facing the valve body at an angle smaller than about 45 degrees. The drainage pipe according to any one of claims 1 to 6, wherein the drainage pipe is characterized.

請求項１に記載の本発明では、排水口からの配管に、側面排水口からの配管を接続した排水配管において、排水口から泡まじりの排水を流した場合に、側面排水口から泡が逆流することを防止することができる。
請求項２乃至請求項５に記載の本発明では、発明の構成を明確化できる。
請求項６に記載の本発明では、逆流防止弁近傍の配管内部を簡単に露出させることができ、清掃や破損時のメンテナンスを容易に行うことができる。
請求項７に記載の本発明では、弁体を一種の排水の為のガイドとして扱うことで、枝管部からの排水が、本管部へ合流する際に、合流がスムーズに行われて乱流の発生を防ぎ、排水性能を良好なものとすることができる。 In the first aspect of the present invention, in the drainage pipe in which the pipe from the drainage port is connected to the pipe from the side drainage port, when foam-fed drainage flows from the drainage port, the bubbles flow backward from the side drainage port. Can be prevented.
In the present invention described in claims 2 to 5, the configuration of the invention can be clarified.
In this invention of Claim 6, the inside of piping near the backflow prevention valve can be exposed easily, and the maintenance at the time of cleaning and breakage can be performed easily.
In the present invention according to claim 7, by treating the valve body as a kind of drainage guide, when the drainage from the branch pipe part joins the main part, the merging is performed smoothly and turbulent. The generation of flow can be prevented and drainage performance can be improved.

第一実施例の施工状態を示す側面図である。It is a side view which shows the construction state of a 1st Example. 第一実施例の要部を示す参考図である。It is a reference figure which shows the principal part of a 1st Example. 第一実施例の、排水口を閉口し逆流防止弁が開口した状態を示す参考図である。It is a reference figure showing the state where the drain outlet was closed and the check valve was opened of the first example. 第一実施例の、逆流防止弁の部材構成を示す参考図である。It is a reference figure which shows the member structure of the backflow prevention valve of a 1st Example. 第二実施例の施工状態を示す側面図である。It is a side view which shows the construction state of a 2nd Example. 第二実施例の要部を示す参考図である。It is a reference figure which shows the principal part of 2nd Example. 第二実施例の、排水口を閉口し逆流防止弁が開口した状態を示す参考図である。It is a reference figure showing the state where the drain outlet was closed and the check valve was opened of the second example. 第二実施例の、逆流防止弁の部材構成を示す参考図である。It is a reference figure which shows the member structure of the backflow prevention valve of 2nd Example.

以下に、本発明の第一実施例を、図面を参照しつつ説明する。
図１乃至図４に示した、本発明の第一実施例の排水配管は、槽体である洗面ボウルＳに施工される排水配管であって、以下に記載する主排水管、枝排水管、逆流防止弁３を備えた継手管１２、から構成され、以下に記載する洗面台に施工される。
洗面ボウルＳは、上方が開口した略箱体形状を成す槽体であって、底面には後述する排水口本体５を取り付ける底面開口部Ｈ１を、側面の上端近傍には側面排水口本体９を取り付ける側面開口部Ｈ２を、それぞれ備えてなる。
主排水管は、洗面ボウルＳの底面の底面開口部Ｈ１に接続され、槽体底面からの排水を下水側に排出するための配管であって、以下に記載する、排水口本体５、テールピース管７、トラップ管８、より構成されてなる。
排水口本体５は、略円筒形状を成す管体であって、上端外側面には外径方向に突出するフランジ部６を備え、該フランジ部６よりも下方の側面に管体の内外を貫通する貫通孔５ａを２カ所備えてなる。また、貫通孔５ａの下方の外側面には、下端まで雄ネジを備えてなる。また、施工完了時、排水口本体５の内部は槽体である洗面ボウルＳ内の排水を排出する排水口１を形成する。
テールピース管７は、略直線状を成す管体からなる部材であって、上端の内周部分に排水口本体５の雄ネジと螺合する雌ネジを備えてなる。
トラップ管８はＳ字形状に屈曲させた管体を、９０度横転させた形状を成す配管部材であって、使用時にその内部に排水を溜めることによってトラップ機能と呼ばれる、下流側から上流側への臭気また害虫類の逆流を防止する機能を備えた部材である。本実施例ではＪ字形状に屈曲した管体を２本組み合わせてＳ字形状となるように構成している。また、トラップ管８の下流側は直下方向に延出されており、トラップ管８の下流側端部と、下水側に繋がる床下配管とが接続されるように構成されてなる。
枝排水管は、洗面台の側面の上端近傍に設けられた、側面開口部Ｈ２に接続され、槽体側面からの排水を主排水管側に排出するための配管であって、以下に記載する、側面排水口本体９、エルボ管１０、ホース管１１、枝付き管４、継手管１２、より構成されてなる。
側面排水口本体９は、略円筒形状を成す管体であって、その一端の外側面には外径方向に突出する鍔部９ａを備えてなる。また、側面排水口本体９の外側面には、下龍側端部まで雄ネジを備えてなる。また、施工完了時、側面排水口本体９の内部は槽体である洗面ボウルＳ内の排水を排出する側面排水口２を形成する。
エルボ管１０は、９０度に屈曲した管体からなる部材であって、上流側の端部の内周部分に側面排水口本体９の雄ネジと螺合する雌ネジを備えてなる。
ホース管１１は洗面ボウルＳの外側面に沿って配置される、可撓性を備えた管体であって、一端はエルボ管１０の下流側端部に接続され、他端には、内部に雌ネジを備えたナット部材１１ａを回動自在に備えてなる。
枝付き管４は、上下に延出された主管部４ａと、該主管部４ａの側面から延出された枝管部４ｂ、から構成される管体である。この枝管部４ｂの端部の外周の外径は、一般的な規格品のホース管１１の内の一つ（例えば管径３０ミリメートル）の寸法の内径に合致するに構成されてなる。
また、後述するように、施工完了時、主管部４ａの内部に、排水口本体５の一部が同心円状に収納配置される。即ち、主管部４ａは、主排水管の一部である排水口本体５に沿って設けられる管体である。
継手管１２は、その内部に逆流防止弁３を構成する管体であって、以下に記載する継手管本体１３と、弁本体１５と、弁押え部材１６と、から構成される。
継手管本体１３は略円筒形状を成す管体であって、上流側端部は外側面にホース管１１のナット部材１１ａの雌ネジと螺合する雌ネジを備えてなり、またその内部には、後述する弁本体１５の回転軸１５ｂを回動自在に収納する溝部１４を備えてなる。
また、継手管本体１３の下流側端部は、その内径が一般的な規格品のホース管１１の内の一つの内径と同じ寸法に構成されてなる。ここでは、上記枝付き管４の枝管部４ｂ端と同様の、管径３０ミリメートルとなるように構成されている。このため、継手管本体１３の上記端部は、枝付き管４の枝管部４ｂに対し、枝管部４ｂ端部をその内部に収納するようにして接続することができる。
弁押え部材１６は、後述する弁本体１５を継手管本体１３の端部からその内部に配置した後、更に継手管１２端部より挿入するリング状の部材であって、溝部１４に配置された回転軸１５ｂが端部側より抜けないように押えると共に、通常時、また逆流の発生時に弁本体１５の弁体１５ａが当接して逆流した泡の通過を防ぐ弁座部１６ａを備えてなる。
弁本体１５は、略円盤状の部材であって、弁座部１６ａに当接して継手管１２内の流路を閉塞する弁体１５ａと、該弁体１５ａの端部に備えられた、溝部１４に回動自在に配置される回転軸１５ｂと、から構成されてなる。
施工完了時、弁本体１５が継手管本体１３内に、回動自在に収納配置された場合、弁本体１５の弁体１５ａは、通常時は自重にて垂立した状態となることで弁座部１６ａに当接し、排水の流路を閉塞する。このため、枝付き管４の枝管部４ｂから、泡等が逆流を生じても、弁本体１５よりも上流側に逆流が上昇することを防止する。
一方、側面排水口２から流れてきた排水が逆流防止弁３に達した場合、排水の水圧によって弁部材は回転軸１５ｂを中心に回転し、弁体１５ａが弁座部１６ａから離間して排水の流路を開口し、これにより排水を下流側に流出することができる。
即ち、本実施例の継手管１２は、常時は閉塞し、側面排水口２から排水を生じた場合のみ開口する逆流防止弁３をその内部に備えてなる。また、本実施例では、弁本体１５は回転軸１５ｂと溝部１４とを組み合わせたことでヒンジ部３ａを形成する。即ち、本実施例の逆流防止弁３は、管体（継手管１２）に対して回動自在に取り付けられるヒンジ部３ａを備えた弁体１５ａからなる。
また、本実施例の排水配管は、必要に応じ排水口本体５の上端の開口を覆って閉塞する、弾性素材からなる蓋部材１７を備えてなる。 Below, the 1st example of the present invention is described, referring to drawings.
The drainage pipe of the first embodiment of the present invention shown in FIG. 1 to FIG. 4 is a drainage pipe constructed in the wash bowl S that is a tank body, and includes a main drainage pipe, a branch drainage pipe described below, It is comprised from the joint pipe | tube 12 provided with the backflow prevention valve 3, and is constructed in the washstand described below.
The wash bowl S is a tank body having a substantially box shape with an upper opening, and a bottom opening H1 to which a drain outlet main body 5 to be described later is attached on the bottom, and a side drain outlet main body 9 in the vicinity of the upper end of the side. Each side opening H2 to be attached is provided.
The main drain pipe is connected to the bottom opening H1 on the bottom surface of the wash bowl S, and is a pipe for discharging waste water from the bottom surface of the tank body to the sewage side. The tube 7 and the trap tube 8 are configured.
The drain outlet main body 5 is a substantially cylindrical tube body, and includes a flange portion 6 projecting in the outer diameter direction on the outer surface of the upper end, and penetrates the inside and outside of the tube body on the side surface below the flange portion 6. Two through-holes 5a are provided. Further, the outer surface below the through hole 5a is provided with a male screw up to the lower end. Further, when the construction is completed, the inside of the drain port body 5 forms the drain port 1 for discharging the drainage in the wash bowl S which is a tank body.
The tailpiece tube 7 is a member formed of a substantially linear tube, and has an internal thread that is screwed with the external thread of the drain port body 5 at the inner peripheral portion of the upper end.
The trap tube 8 is a piping member that is formed by rolling a tube body bent into an S shape by 90 degrees, and is called a trap function by collecting drainage in the tube during use from the downstream side to the upstream side. It is a member that has a function of preventing the odor of insects and the backflow of pests. In the present embodiment, two tubular bodies bent in a J shape are combined to form an S shape. In addition, the downstream side of the trap pipe 8 extends in a directly downward direction, and the downstream end portion of the trap pipe 8 is connected to the underfloor pipe connected to the sewage side.
The branch drain pipe is connected to a side opening H2 provided near the upper end of the side surface of the washstand, and is a pipe for discharging waste water from the tank side face to the main drain pipe side, which will be described below. , Side drain outlet main body 9, elbow pipe 10, hose pipe 11, branch pipe 4, and joint pipe 12.
The side drainage main body 9 is a tubular body having a substantially cylindrical shape, and is provided with a flange portion 9a protruding in the outer diameter direction on the outer surface of one end thereof. Moreover, the outer surface of the side surface drain outlet main body 9 is provided with a male screw up to the lower dragon side end. Further, when the construction is completed, the inside of the side drain main body 9 forms a side drain 2 for discharging the drainage in the wash bowl S which is a tank body.
The elbow pipe 10 is a member made of a tubular body bent at 90 degrees, and has an internal thread that is screwed with an external thread of the side drainage body 9 at the inner peripheral portion of the upstream end.
The hose tube 11 is a flexible tube disposed along the outer surface of the wash bowl S, and one end is connected to the downstream end of the elbow tube 10 and the other end is connected to the inside. A nut member 11a having a female screw is rotatably provided.
The branch pipe 4 is a tube composed of a main pipe portion 4a extending vertically and a branch pipe portion 4b extending from a side surface of the main pipe portion 4a. The outer diameter of the outer periphery of the end portion of the branch pipe portion 4b is configured to match the inner diameter of one of the standard hose pipes 11 (for example, a pipe diameter of 30 millimeters).
Further, as will be described later, when the construction is completed, a part of the drain outlet main body 5 is accommodated and arranged concentrically inside the main pipe portion 4a. That is, the main pipe portion 4a is a pipe body provided along the drain outlet main body 5 which is a part of the main drain pipe.
The joint pipe 12 is a pipe body that forms the backflow prevention valve 3 therein, and includes a joint pipe main body 13, a valve main body 15, and a valve pressing member 16 described below.
The joint pipe main body 13 is a pipe body having a substantially cylindrical shape, and the upstream side end portion is provided with a female screw threadedly engaged with the female screw of the nut member 11a of the hose pipe 11 on the outer surface, and in the inside thereof. A groove portion 14 is provided for rotatably accommodating a rotating shaft 15b of a valve body 15 to be described later.
Further, the downstream end portion of the joint pipe main body 13 is configured to have the same inner diameter as that of one of the standard hose pipes 11 of a standard product. Here, it is configured to have a tube diameter of 30 mm, similar to the end of the branch pipe portion 4b of the branch pipe 4. For this reason, the said edge part of the coupling pipe main body 13 can be connected with respect to the branch pipe part 4b of the branch pipe 4 so that the branch pipe part 4b end part may be accommodated in the inside.
The valve pressing member 16 is a ring-shaped member that is inserted from the end of the joint pipe 12 after the valve main body 15 to be described later is arranged from the end of the joint pipe main body 13 to the inside thereof, and is arranged in the groove 14. The rotary shaft 15b is pressed so as not to come out from the end side, and is provided with a valve seat portion 16a that prevents the passage of the backflowed foam by the contact of the valve body 15a of the valve body 15 at the normal time or when a backflow occurs.
The valve body 15 is a substantially disk-shaped member, and a valve body 15a that abuts the valve seat portion 16a to close the flow path in the joint pipe 12, and a groove portion provided at an end of the valve body 15a. 14 and a rotating shaft 15b that is rotatably arranged on the motor.
When the valve body 15 is rotatably accommodated in the joint pipe body 13 at the completion of the construction, the valve body 15a of the valve body 15 is in a state of being suspended by its own weight under normal conditions. It abuts against the portion 16a and closes the drainage channel. For this reason, even if bubbles or the like cause a back flow from the branch pipe portion 4 b of the branch pipe 4, the back flow is prevented from rising upstream from the valve body 15.
On the other hand, when the waste water flowing from the side drain port 2 reaches the backflow prevention valve 3, the valve member rotates around the rotation shaft 15b by the water pressure of the waste water, and the valve body 15a is separated from the valve seat portion 16a to drain the water. In this way, the waste water can flow out downstream.
That is, the joint pipe 12 of this embodiment is normally closed and includes a backflow prevention valve 3 that opens only when drainage is generated from the side drainage port 2. In the present embodiment, the valve body 15 forms the hinge portion 3a by combining the rotating shaft 15b and the groove portion 14. That is, the backflow prevention valve 3 of the present embodiment includes a valve body 15a including a hinge portion 3a that is rotatably attached to a pipe body (joint pipe 12).
Further, the drainage pipe of the present embodiment includes a lid member 17 made of an elastic material that covers and closes the opening at the upper end of the drainage port body 5 as necessary.

上記した各部材から構成される排水配管は、以下のようにして洗面台に施工される。
尚、本実施例において、特に詳述しない場合でも、各配管の接続箇所等は、必要に応じ接着やパッキングを利用した接続により、漏水などが生じないように構成されてなる。
始めに、工場等において、ホース管１１のナット部材１１ａを備えない側の端部に、エルボ管１０の下流側端部を接着によって水密的に接続する。
また、継手管本体１３の下流側端部に、枝付き管４の枝管部４ｂを、接着によって水密的に接続する。
また、継手管本体１３の溝部１４に弁本体１５の回転軸１５ｂを収納し、更に弁押え部材１６を継手管本体１３内に挿入して、継手管本体１３内に逆流防止弁３を構成する。
更に、ホース管１１のナット部材１１ａの雌ネジを継手管本体１３の雄ネジに螺合させて、継手管本体１３をホース管１１に水密的且つ着脱自在に接続する。
上記のようにして枝排水管の一部を構成した上で、施工現場に各部材を搬入し、次のようにして施工を行う。
施工現場において、まず、キャビネットや台座等を設置した上で、その上に洗面ボウルＳを配置して洗面台を構成する。また、この際のキャビネット下の床面には開口が設けられ、開口部分から下水側に繋がる、床下空間に配管された床下配管に管体を接続できるように構成されてなる。
次に、洗面ボウルＳの底面開口部Ｈ１に排水口本体５を挿通し、排水口本体５のフランジ部６下面と、底面開口部Ｈ１周縁の上面とが当接するように配置する。更に枝付き管４を、洗面ボウルＳの下方側から配置する。この時は、枝付き管４の主管部４ａの内部に、主管部４ａと排水口本体５とが同心円状になるように、枝付き管４を挿通させる。また、枝管部４ｂが側面排水口２側を向く方に配置しておく。
次に、排水口本体５の下端から、排水口本体５の雄ネジにテールピース管７の雌ネジを螺合させて締め付けを行う。この時、枝付き管４の主管部４ａは、上端は洗面ボウルＳの底面開口部Ｈ１周縁の下面に、下端はテールピース管７の上端にそれぞれ水密的に当接した状態となる。
このようにして、底面開口部Ｈ１の周縁を、枝付き管４の主管部４ａを介して、排水口本体５のフランジ部６とテールピース管７上面とで挟持することで、排水口本体５及びテールピース管７が洗面ボウルＳに接続固定される。
次に、洗面ボウルＳの側面開口部Ｈ２の周縁の裏面側に、エルボ管１０の上流側端部を当接させた上で、側面排水口本体９を側面開口部Ｈ２に挿通し、側面排水口本体９の雄ネジを、エルボ管１０の雌ネジに螺合させ、締め付けを行う。
このようにして、側面開口部Ｈ２の周縁を、側面排水口本体９の鍔部９ａとエルボ管１０の上流側端部とで挟持することで、側面排水口本体９及びエルボ管１０が洗面ボウルＳに接続固定される。
更に、テールピース管７の下流側端部にトラップ管８の上流側端部を接続し、トラップ管８の下流側端部を床下配管に接続して、本実施例の排水配管の、洗面台への施工が完了する。
尚、継手管１２を上記のように構成・接続したことから、本実施例の排水配管は、常時は閉塞し、側面排水口２から排水を生じた場合のみ開口する逆流防止弁３を備えた継手管１２を、枝管部４ｂの端部に接続した排水配管である。 The drainage pipe composed of each member described above is applied to the washstand as follows.
In the present embodiment, even if not specifically described, the connection locations of the respective pipes are configured so that water leakage does not occur due to connection using bonding or packing as necessary.
First, in a factory or the like, the downstream end of the elbow pipe 10 is watertightly connected to the end of the hose pipe 11 on the side not provided with the nut member 11a.
Further, the branch pipe portion 4b of the branch pipe 4 is connected to the downstream end portion of the joint pipe body 13 in a watertight manner by bonding.
Further, the rotary shaft 15b of the valve body 15 is housed in the groove portion 14 of the joint pipe body 13, and the valve pressing member 16 is further inserted into the joint pipe body 13 to constitute the backflow prevention valve 3 in the joint pipe body 13. .
Further, the female thread of the nut member 11 a of the hose pipe 11 is screwed into the male thread of the joint pipe main body 13 to connect the joint pipe main body 13 to the hose pipe 11 in a watertight and detachable manner.
After configuring a part of the branch drainage pipe as described above, each member is carried into the construction site, and construction is performed as follows.
At the construction site, first, a cabinet, a pedestal, and the like are installed, and then a wash bowl S is arranged thereon to constitute a wash basin. Moreover, an opening is provided in the floor surface under the cabinet in this case, and the pipe body is configured to be connected to an underfloor pipe connected to the underfloor space connected from the opening portion to the sewage side.
Next, the drain outlet main body 5 is inserted into the bottom opening H1 of the wash bowl S, and the bottom surface of the flange 6 of the drain outlet main body 5 and the top surface of the peripheral edge of the bottom opening H1 are disposed so as to contact each other. Further, the branch pipe 4 is arranged from the lower side of the wash bowl S. At this time, the branch pipe 4 is inserted into the main pipe portion 4a of the branch pipe 4 so that the main pipe portion 4a and the drain port body 5 are concentric. Moreover, it arrange | positions so that the branch pipe part 4b may face the side surface drain port 2 side.
Next, from the lower end of the drain port main body 5, the female screw of the tailpiece tube 7 is screwed into the male screw of the drain port main body 5 and tightened. At this time, the main pipe portion 4a of the branch pipe 4 is in a state where the upper end is in contact with the lower surface of the peripheral edge of the bottom opening H1 of the wash bowl S and the lower end is in watertight contact with the upper end of the tailpiece pipe 7, respectively.
In this way, the drain opening main body 5 is sandwiched between the flange 6 of the drain outlet main body 5 and the top surface of the tail piece pipe 7 via the main pipe portion 4a of the branch pipe 4 in the periphery of the bottom opening H1. The tail piece tube 7 is connected and fixed to the wash bowl S.
Next, after the upstream end of the elbow pipe 10 is brought into contact with the back surface of the peripheral edge of the side opening H2 of the wash bowl S, the side drainage main body 9 is inserted into the side opening H2, and the side drainage is performed. The male screw of the mouth main body 9 is screwed into the female screw of the elbow pipe 10 and tightened.
In this way, by holding the peripheral edge of the side opening H2 between the flange 9a of the side drain main body 9 and the upstream end of the elbow pipe 10, the side drain main body 9 and the elbow pipe 10 are wash bowls. The connection is fixed to S.
Furthermore, the upstream end of the trap pipe 8 is connected to the downstream end of the tail piece pipe 7, the downstream end of the trap pipe 8 is connected to the underfloor pipe, and the wash basin of the drain pipe of this embodiment is used. The construction to is completed.
In addition, since the joint pipe 12 was configured and connected as described above, the drainage pipe of the present example was provided with the backflow prevention valve 3 that was normally closed and opened only when drainage was generated from the side drainage port 2. This is a drainage pipe in which the joint pipe 12 is connected to the end of the branch pipe part 4b.

上記のように構成した配管構造において、洗面台を使用し、洗面ボウルＳ内に排水が発生すると、排水は、洗面ボウルＳ底面に配置された排水口本体５内部の排水口１から、排水口本体５内部、テールピース管７、トラップ管８、の順に通過し、最終的には床下配管から下水側に排出される。
また、上記排水口１に、図３のように蓋部材１７を配置して排水口１からの排水が行われないようにした上で、洗面ボウルＳ内に吐水を行うと、吐水は排出されること無く洗面ボウルＳ内に吐水が溜まってゆく。溜まった吐水の水位が側面排水口２の下端よりも上方に達すると、洗面ボウルＳ内に溜まった吐水は側面排水口２から、側面排水口本体９内部、エルボ管１０、ホース管１１、継手管１２、枝付き管４の枝管部４ｂ、枝付き管４の主管部４ａ内から排水口本体５の貫通孔５ａを介して排水口本体５内に流入し、更に（排水口１からの排水の場合と同様に）テールピース管７、トラップ管８、の順に通過し、最終的には床下配管から下水側に排出される。
尚、上記のように側面排水口２から排水が行われる場合、排水が継手管１２内を通過する際に、図３に示したように、排水の水圧によって継手管１２の内部で弁本体１５が回転軸１５ｂを中心に回動して排水の流路を開放し、排水の通過が行われる。排水が終了し、継手管１２内から排水が無くなると、弁本体１５は再び弁本体１５の自重によって垂立した状態となることで弁座部１６ａに当接し、排水の流路を閉塞する。
また、上記のようにして排水が行われ、トラップ管８内を排水が通過する際、トラップ管８の屈曲部分の内部に排水の溜まり部分が生じる。この排水の溜まり部分によって、トラップ管８内の流路には、（長期間の放置によって蒸発しない限り）排水が常に満水状態となっている箇所が発生する。この、流路が排水によって満水となった部分によって、下流側から臭気や害虫類が屋内側に逆流することが防止される。このように、下水側に繋がる配管から臭気や害虫類が屋内側に侵入することを防止する機能を「トラップ機能」と呼ぶ。また、上記トラップ管８の曲がり部分に溜まって流路を満水状態とした排水は「封水」と呼ばれる。本実施例のトラップ管８は、封水を利用してトラップ機能を生じさせた、「封水式排水トラップ」である。 In the piping structure configured as described above, when a wash basin is used and waste water is generated in the wash bowl S, the waste water is discharged from the drain port 1 inside the drain port body 5 disposed on the bottom surface of the wash bowl S. The main body 5 passes through the tailpiece pipe 7 and the trap pipe 8 in this order, and is finally discharged from the underfloor pipe to the sewage side.
In addition, when the lid member 17 is disposed at the drain outlet 1 as shown in FIG. 3 so that the drainage from the drain outlet 1 is not performed, and the water is discharged into the wash bowl S, the discharged water is discharged. Water is accumulated in the wash bowl S without any problems. When the accumulated water level reaches above the lower end of the side drain port 2, the water accumulated in the wash bowl S passes from the side drain port 2 to the inside of the side drain main body 9, the elbow pipe 10, the hose pipe 11, and the joint. The pipe 12, the branch pipe portion 4 b of the branch pipe 4, the main pipe portion 4 a of the branch pipe 4 flows into the drain port body 5 through the through hole 5 a of the drain port body 5, and further (from the drain port 1 As in the case of drainage, the tailpiece pipe 7 and the trap pipe 8 are passed in this order, and finally discharged from the underfloor pipe to the sewage side.
When drainage is performed from the side drainage port 2 as described above, when the drainage passes through the joint pipe 12, the valve main body 15 is formed inside the joint pipe 12 by the water pressure of the drainage as shown in FIG. Rotates around the rotating shaft 15b to open the drainage flow path, and the drainage passes. When the drainage is completed and the drainage from the joint pipe 12 is eliminated, the valve body 15 comes into a suspended state again due to the weight of the valve body 15 and abuts the valve seat portion 16a to close the drainage flow path.
In addition, drainage is performed as described above, and when the drainage passes through the trap tube 8, a drainage accumulation portion is generated inside the bent portion of the trap tube 8. Due to the accumulated portion of the drainage, a location where the drainage is always full is generated in the flow path in the trap pipe 8 (unless it evaporates by being left for a long period of time). This portion of the flow path filled with drainage prevents odors and pests from flowing backward from the downstream side to the indoor side. In this way, the function of preventing odors and pests from entering the indoor side from the pipe connected to the sewage side is called a “trap function”. Further, the drainage that accumulates in the bent portion of the trap pipe 8 and fills the flow path is called “sealed water”. The trap tube 8 of the present embodiment is a “sealed drainage trap” in which a trap function is generated using sealed water.

上記のように構成した配管構造において、洗面台にて石鹸・洗剤などを使用し、洗面ボウルＳ内に泡混じりの排水を発生させた上で、この排水を排水口１から排出した場合、泡混じりの排水は、洗面ボウルＳ底面に配置された排水口本体５内部の排水口１から、排水口本体５内部、テールピース管７、トラップ管８、の順に通過し、最終的には床下配管から下水側に排出される。
この場合において、排水配管上に封水式排水トラップを備えたことで、排水中の泡が下流側に流出しにくくなる状態が発生する。詳述すると、封水式排水トラップを含む配管において、排水等が封水の部分を通過して下流側に流出するためには、封水の水面よりも下方になる位置まで通過しなければならないが、泡は気体を含有している為、排水に比べて比重は相当に軽く、封水水面よりも下方に下がるためには泡と共に流れる排水の勢いが相当に強くなければならない。このため、排水の量が少なく、勢いが弱かったり、排水の終了間際で排水の流れの勢いが弱まった状態の際に流れ込む泡は、封水を超えることができず、封水よりも上流側に残留する。
この場合に、洗面ボウルＳ側面の排水口１からは排水が継続して流れている場合が多く、泡は封水の水面上から堆積してゆき、排水口本体５内部、貫通孔５ａ、枝付き管４の主管部４ａ内、枝管部４ｂ、まで充満するが、本実施例では、継手管１２内において、常時は閉塞し、側面排水口２から排水を生じた場合のみ開口する逆流防止弁３を備えてなる。具体的には、継手管本体１３の内部において、弁本体１５が弁座部１６ａに通常時当接すると共に、下流側から上流側へ泡の圧力が生じても、そのまま弁本体１５の弁体１５ａが、弁座部１６ａに強く当接して、確実に泡の逆流を防止する。
このため、排水中に石鹸・洗剤などに由来する泡が混入していても、継手管１２の逆流防止弁３によって逆流が防止され、側面排水口２から泡が逆流して溢れ出す、ということは無い。 In the piping structure configured as described above, when soap and detergent are used in the washstand and foamy wastewater is generated in the washbasin S, the wastewater is discharged from the drain outlet 1 The mixed drainage passes from the drain port 1 inside the drain port body 5 arranged on the bottom surface of the wash bowl S to the inside of the drain port body 5, the tail piece pipe 7, and the trap pipe 8 in the order, and finally the underfloor pipe To the sewage side.
In this case, since the sealed drainage trap is provided on the drainage pipe, a state in which bubbles in the drainage hardly flow out to the downstream side occurs. More specifically, in a pipe including a sealed drain trap, in order for drainage and the like to pass through the sealed water and flow downstream, it must pass to a position below the surface of the sealed water. However, since the bubbles contain gas, the specific gravity is considerably lighter than that of the drainage, and the power of the drainage flowing along with the bubbles must be considerably strong in order to fall below the sealed water surface. For this reason, the amount of drainage is low, the momentum is weak, or the foam that flows in when the drainage flow is weak just before the end of drainage cannot exceed the sealed water, upstream of the sealed water To remain.
In this case, in many cases, drainage continues to flow from the drainage port 1 on the side of the wash bowl S, and foam accumulates from the surface of the sealed water. Although the main pipe portion 4a and the branch pipe portion 4b of the auxiliary pipe 4 are filled up, in this embodiment, the joint pipe 12 is always closed and the backflow prevention that opens only when drainage is generated from the side drainage port 2 is prevented. A valve 3 is provided. Specifically, inside the joint pipe main body 13, the valve main body 15 normally contacts the valve seat portion 16 a, and even if foam pressure is generated from the downstream side to the upstream side, the valve body 15 a of the valve main body 15 is left as it is. However, it strongly abuts against the valve seat portion 16a and reliably prevents the backflow of bubbles.
For this reason, even if bubbles derived from soap, detergent, etc. are mixed in the drainage, the backflow prevention valve 3 of the joint pipe 12 prevents the backflow, and the bubbles backflow and overflow from the side drainage port 2. There is no.

また、上記継手管１２の逆流防止弁３の回動する回転軸１５ｂのように、機械要素を備えた場合、排水中の塵芥や油分、また泡の原因となった石鹸・洗剤成分などが回転軸１５ｂ等に付着したり、また弁体１５ａと弁座部１６ａとの間に付着し弁体１５ａから弁座部１６ａを離間し難くする場合があるが、本実施例では、継手管１２の端部とホース管１１とをナット部材１１ａを利用して接続しており、ナット部材１１ａの螺合を緩めることで、ホース管１１と継手管１２とを容易に着脱・分離することができる。このようにホース管１１と継手管１２とを着脱・分離し、弁本体１５や弁押え部材１６を取り出して、各部材や継手管１２内部を清掃し、再度接続を行うことで、上記の様に排水中の石鹸や洗剤、塵芥や油分等の汚濁物質などに由来する動作異常を容易に解消することができる。また、部材の破損等による動作異常が発生しても、同様にホース管１１と継手管１２とを容易に着脱・分離し、破損した部材（弁本体１５や弁押え部材１６）の交換を行う等することで、容易に修理作業を行うことができる。
即ち、本実施例では、逆流防止弁３を備えた枝排水管の管体である継手管１２が、他の枝排水管の部材であるホース管１１に対して着脱自在に構成され、着脱により開放された箇所から弁体１５ａを枝排水管外に取り出して部材交換や清掃が可能に構成されてなる。 Further, when a mechanical element is provided such as the rotating shaft 15b of the joint pipe 12 where the backflow prevention valve 3 rotates, dust and oil in the drainage, and soap / detergent components that cause bubbles rotate. Although it may adhere to the shaft 15b or the like, or may adhere between the valve body 15a and the valve seat portion 16a, it may be difficult to separate the valve seat portion 16a from the valve body 15a. The end part and the hose pipe 11 are connected using the nut member 11a, and the hose pipe 11 and the joint pipe 12 can be easily attached / detached / separated by loosening the screwing of the nut member 11a. In this manner, the hose pipe 11 and the joint pipe 12 are detached and separated, the valve body 15 and the valve presser member 16 are taken out, the inside of each member and the joint pipe 12 is cleaned, and the connection is performed again as described above. In addition, it is possible to easily eliminate operational abnormalities caused by soaps and detergents in the drainage, and pollutants such as dust and oil. Further, even if an operation abnormality occurs due to damage to the member, the hose pipe 11 and the joint pipe 12 are similarly easily detached and detached, and the damaged member (the valve body 15 or the valve pressing member 16) is replaced. Thus, repair work can be easily performed.
That is, in the present embodiment, the joint pipe 12 that is a branch drain pipe body provided with the backflow prevention valve 3 is configured to be detachable from the hose pipe 11 that is a member of another branch drain pipe. The valve body 15a is taken out of the branch drainage pipe from the opened position, and can be replaced or cleaned.

次に、本発明の第二実施例を、図面を参照しつつ説明する。
図５乃至図８に示した、本発明の第二実施例の排水配管は、槽体である洗面ボウルＳに施工される排水配管であって、以下に記載する枝付き管４、トラップ管８、側面排水口本体９、エルボ管１０、ホース管１１、弁本体１５より構成されてなる。
この内、トラップ管８、側面排水口本体９、エルボ管１０、ホース管１１は、段落００１４に記載された第一実施例の各部材と同一の構成のため、説明は省略し、洗面ボウルＳ、枝付き管４、弁本体１５、及び弁押え部材１６の構造について説明する。
洗面ボウルＳは、上方が開口した略箱体形状を成す槽体であって、底面には上下に貫通した開口からなる排水口１を、側面の上端近傍には側面排水口本体９を取り付ける側面開口部Ｈ２を、それぞれ備えてなる。また、排水口１周縁の下面には、後述するビス部材１８ａを螺合するためのネジ穴部１８ｂを複数備えてなる。
枝付き管４は、上下に延出された主管部４ａと、該主管部４ａの側面から延出された枝管部４ｂ、から構成される管体であって、主管部４ａの上面には外周方向に突出したフランジ部６を備え、また該フランジ部６の数カ所に、後述するビス部材１８ａが貫通するための穴部６ａを備えてなる。
また枝管部４ｂの外側面にはホース管１１のナット部材１１ａの雌ネジと螺合する雄ネジを備えてなり、またその内部には、弁本体１５の回転軸１５ｂを回動自在に収納する溝部１４を備えてなる。
弁押え部材１６は、後述する弁本体１５を枝付き管４の枝管部４ｂの端部からその内部に配置した後、更に枝管部４ｂ端部より挿入するリング状の部材であって、溝部１４に配置された回転軸１５ｂが端部側より抜けないように押えると共に、通常時、また逆流の発生時に弁本体１５の弁体１５ａが当接して逆流した泡の通過を防ぐ弁座部１６ａを備えてなる。
弁本体１５は、略円盤状の部材であって、弁座部１６ａに当接して枝管部４ｂ内の流路を閉塞する弁体１５ａと、該弁体１５ａの端部に備えられた、溝部１４に回動自在に配置される回転軸１５ｂと、から構成されてなる。
施工完了時、弁本体１５が枝管部４ｂ内に、回動自在に収納配置された場合、弁本体１５の弁体１５ａは、通常時は自重にて垂立した状態となることで弁座部１６ａに当接し、排水の流路を閉塞する。このため、枝付き管４の主管部４ａから、泡等が逆流を生じても、弁本体１５よりも上流側に逆流が上昇することを防止する。
一方、側面排水口２から流れてきた排水が逆流防止弁３に達した場合、排水の水圧によって弁部材は回転軸１５ｂを中心に回転し、弁体１５ａが弁座部１６ａから離間して排水の流路を開口し、これにより排水を下流側に流出することができる。
即ち、本実施例の枝付き管４の枝管部４ｂは、常時は閉塞し、側面排水口２から排水を生じた場合のみ開口する逆流防止弁３をその内部に備えてなる。また、本実施例では、弁本体１５は回転軸１５ｂと溝部１４とを組み合わせたことでヒンジ部３ａを形成する。即ち、本実施例の逆流防止弁３は、管体（枝管部４ｂ）に対して回動自在に取り付けられるヒンジ部３ａを備えた弁体１５ａからなる。
また、本実施例の枝付き管４と逆流防止弁３においては、枝付き管４の枝管部４ｂ内に弁体１５ａの回動の程度をコントロールする突起部分４ｃを設けてなる。
この突起部分４ｃによって、弁本体１５の弁体１５ａは、最も開いた時（弁座部１６ａから離間した時）、その先端が枝付き管４の主管部４ａ内に突出すると共に、弁体１５ａの平面と、主管部４ａの弁体１５ａに対向する面とが成す角度（図７のＡで示される角度）が略４５度以下となるように構成されてなる。これにより、枝管部４ｂを通過して主管部４ａ内に流入する排水は、主管部４ａの弁体１５ａに対向する面に衝突する場合でも、弁体１５ａがガイドとなって４５度より小さい角度で衝突することとなり、衝突の衝撃が（壁面に正面から衝突する等４５度を超える角度で衝突する場合に比べ）小さくなり、本管部へ合流する際に、合流がスムーズに行われて乱流の発生を防ぎ、排水性能を良好なものとすることができる。
尚、本実施例では上記のように弁本体１５の弁体１５ａは、最も開いた時、弁体１５ａの平面と、主管部４ａの弁体１５ａに対向する面とが成す角度を略４５度以下となるように構成したが、要求されるのは弁体１５ａにガイドされて枝管部４ｂを通過した排水が、対向する壁面に衝突する際に略４５度以下となることであって、弁体１５ａを通過してから対向する壁面に衝突するまでに重力によって多少下方に屈曲するため、その分を見越して、弁体１５ａが最も開いた時、弁体１５ａの平面と、主管部４ａの弁体１５ａに対向する面とが成す角度が５５度程度までであれば、ほぼ確実に、排水が枝管部４ｂに対向する壁面に衝突する際に略４５度以下とすることができる。もちろん、確実さを求めるのであれば、上記本実施例のように、略４５度以下となるようにすることで確実に略４５度以下とすることができる。
ビス部材１８ａは、枝付き管４を洗面ボウルＳ下面に取り付けるための雄ネジを備えた部材であって、枝付き管４の穴部６ａを貫通した上で、洗面ボウルＳの下面のネジ穴部１８ｂに螺合するように構成されてなる。
また、本実施例の排水配管は、必要に応じ排水口本体５の上端の開口を覆って閉塞する、弾性素材からなる蓋部材１７を備えてなる。 Next, a second embodiment of the present invention will be described with reference to the drawings.
The drainage pipe of the second embodiment of the present invention shown in FIGS. 5 to 8 is a drainage pipe constructed on the wash bowl S which is a tank body, and is described below with a branch pipe 4 and a trap pipe 8. , Side drain outlet body 9, elbow pipe 10, hose pipe 11, and valve body 15.
Among these, the trap pipe 8, the side drain main body 9, the elbow pipe 10, and the hose pipe 11 have the same configuration as each member of the first embodiment described in the paragraph 0014, and therefore the description thereof is omitted, and the wash bowl S The structures of the branch pipe 4, the valve body 15, and the valve pressing member 16 will be described.
The wash bowl S is a tank body having a substantially box shape with an open top, and a side surface to which a drain port 1 having an opening penetrating vertically is formed on the bottom surface, and a side drain port body 9 is mounted near the upper end of the side surface. Each of the openings H2 is provided. The lower surface of the periphery of the drain port 1 is provided with a plurality of screw hole portions 18b for screwing a screw member 18a described later.
The branch pipe 4 is a pipe body composed of a main pipe portion 4a extending vertically and a branch pipe portion 4b extending from a side surface of the main pipe portion 4a. A flange portion 6 projecting in the outer peripheral direction is provided, and holes 6a through which a screw member 18a described later passes are provided at several locations on the flange portion 6.
Further, the outer surface of the branch pipe portion 4b is provided with a male screw that is screwed with a female screw of the nut member 11a of the hose pipe 11, and the rotary shaft 15b of the valve body 15 is rotatably accommodated therein. The groove part 14 to be provided is provided.
The valve pressing member 16 is a ring-shaped member that is inserted from the end portion of the branch pipe portion 4b after the valve body 15 described later is disposed from the end portion of the branch pipe portion 4b of the branch pipe 4 to the inside thereof. A valve seat portion that presses the rotating shaft 15b disposed in the groove portion 14 so as not to come off from the end side, and prevents the passage of the backflowed foam by the contact of the valve body 15a of the valve body 15 at the normal time or when a backflow occurs. 16a.
The valve body 15 is a substantially disk-shaped member, and is provided at a valve body 15a that contacts the valve seat portion 16a and closes the flow path in the branch pipe portion 4b, and an end portion of the valve body 15a. The rotary shaft 15b is rotatably disposed in the groove portion 14.
When construction is completed, when the valve main body 15 is rotatably housed in the branch pipe portion 4b, the valve body 15a of the valve main body 15 is normally suspended by its own weight so that the valve seat It abuts against the portion 16a and closes the drainage channel. For this reason, even if bubbles or the like cause a back flow from the main pipe portion 4 a of the branch pipe 4, the back flow is prevented from rising upstream from the valve body 15.
On the other hand, when the waste water flowing from the side drain port 2 reaches the backflow prevention valve 3, the valve member rotates around the rotation shaft 15b by the water pressure of the waste water, and the valve body 15a is separated from the valve seat portion 16a to drain the water. In this way, the waste water can flow out downstream.
That is, the branch pipe portion 4b of the branch pipe 4 of the present embodiment is normally closed and includes a backflow prevention valve 3 that opens only when drainage is generated from the side drainage port 2 therein. In the present embodiment, the valve body 15 forms the hinge portion 3a by combining the rotating shaft 15b and the groove portion 14. That is, the backflow prevention valve 3 of the present embodiment includes a valve body 15a including a hinge portion 3a that is rotatably attached to a tube body (branch tube portion 4b).
Further, in the branch pipe 4 and the backflow prevention valve 3 of this embodiment, a protruding portion 4c for controlling the degree of rotation of the valve body 15a is provided in the branch pipe portion 4b of the branch pipe 4.
By this protruding portion 4c, when the valve body 15a of the valve body 15 is most opened (when separated from the valve seat portion 16a), the tip protrudes into the main pipe portion 4a of the branch pipe 4, and the valve body 15a The angle formed by the flat surface and the surface of the main pipe portion 4a facing the valve body 15a (the angle indicated by A in FIG. 7) is approximately 45 degrees or less. Thereby, even if the waste water flowing into the main pipe portion 4a through the branch pipe portion 4b collides with the surface of the main pipe portion 4a facing the valve body 15a, the valve body 15a serves as a guide and is less than 45 degrees. The impact of the collision will be small (compared to the case of colliding at an angle exceeding 45 degrees, such as colliding with the wall from the front), and when merging into the main section, the merging is performed smoothly. Generation of turbulence can be prevented and drainage performance can be improved.
In the present embodiment, as described above, the valve body 15a of the valve body 15 has an angle formed by the flat surface of the valve body 15a and the surface of the main pipe portion 4a facing the valve body 15a when the valve body 15a is opened to about 45 degrees. Although configured to be as follows, what is required is that the drainage that has been guided by the valve body 15a and passed through the branch pipe portion 4b is about 45 degrees or less when colliding with the opposing wall surface, Since it bends somewhat downward due to gravity from the time when it passes through the valve body 15a until it collides with the opposite wall surface, the plane of the valve body 15a and the main pipe portion 4a when the valve body 15a is most open in anticipation of that amount. If the angle formed by the surface facing the valve body 15a is up to about 55 degrees, the drainage can be made almost 45 degrees or less when the drainage collides with the wall surface facing the branch pipe portion 4b. Of course, if the certainty is to be obtained, it can be surely set to about 45 degrees or less by setting the angle to about 45 degrees or less as in the present embodiment.
The screw member 18a is a member provided with a male screw for attaching the branch pipe 4 to the lower surface of the wash bowl S. The screw member 18a penetrates the hole 6a of the branch pipe 4 and then the screw hole on the lower face of the wash bowl S. It is configured to be screwed into the portion 18b.
Further, the drainage pipe of the present embodiment includes a lid member 17 made of an elastic material that covers and closes the opening at the upper end of the drainage port body 5 as necessary.

上記した各部材から構成される排水配管は、以下のようにして洗面台に施工される。
尚、本実施例において、特に詳述しない場合でも、各配管の接続箇所等は、必要に応じ接着やパッキングを利用した接続により、漏水などが生じないように構成されてなる。
始めに、工場等において、ホース管１１のナット部材１１ａを備えない側の端部に、エルボ管１０の下流側端部を接着によって水密的に接続する。
また、枝付き管４の溝部１４に、弁本体１５の回転軸１５ｂを収納し、更に弁押え部材１６を枝管部４ｂ内に挿入して、枝管部４ｂ内に逆流防止弁３を構成する。
更に、ホース管１１のナット部材１１ａの雌ネジを枝付き管４の枝管部４ｂの雄ネジに螺合させて、枝付き管４をホース管１１に水密的且つ着脱自在に接続する。
上記のようにして枝排水管の一部を構成した上で、施工現場に各部材を搬入し、次のようにして施工を行う。
施工現場において、まず、キャビネットや台座等を設置した上で、その上に洗面ボウルＳを配置して洗面台を構成する。また、この際のキャビネット下の床面には開口が設けられ、開口部分から下水側に繋がる、床下空間に配管された床下配管に管体を接続できるように構成されてなる。
次に、洗面ボウルＳの排水口１周縁の下面に枝付き管４のフランジ部６を当接させ、更にフランジ部６に複数設けられた穴部６ａを介した上でビス部材１８ａをネジ穴部１８ｂに螺合させて、枝付き管４を洗面ボウルＳに接続固定する（前述のように、必要に応じてパッキングを利用し水密的に接続する）。
また、この接続の際には、枝管部４ｂが側面排水口２側を向く方に配置しておく。
次に、洗面ボウルＳの側面開口部Ｈ２の周縁の裏面側に、エルボ管１０の上流側端部を当接させた上で、側面排水口本体９を側面開口部Ｈ２に挿通し、側面排水口本体９の雄ネジを、エルボ管１０の雌ネジに螺合させ、締め付けを行う。
このようにして、側面開口部Ｈ２の周縁を、側面排水口本体９の鍔部９ａとエルボ管１０の上流側端部とで挟持することで、側面排水口本体９及びエルボ管１０が洗面ボウルＳに接続固定される。
更に、枝付き管４の下端にトラップ管８の上流側端部を接続し、トラップ管８の下流側端部を床下配管に接続して、本実施例の排水配管の、洗面台への施工が完了する。
尚、枝付き管４の枝管部４ｂを上記のように構成・接続したことから、本実施例の排水配管は、常時は閉塞し、側面排水口２から排水を生じた場合のみ開口する逆流防止弁３を、枝付き管４の枝管部４ｂに備えた排水配管である。 The drainage pipe composed of each member described above is applied to the washstand as follows.
In the present embodiment, even if not specifically described, the connection locations of the respective pipes are configured so that water leakage does not occur due to connection using bonding or packing as necessary.
First, in a factory or the like, the downstream end of the elbow pipe 10 is watertightly connected to the end of the hose pipe 11 on the side not provided with the nut member 11a.
Further, the rotary shaft 15b of the valve body 15 is accommodated in the groove portion 14 of the branch pipe 4, and the valve pressing member 16 is further inserted into the branch pipe portion 4b to constitute the backflow prevention valve 3 in the branch pipe portion 4b. To do.
Further, the female thread of the nut member 11 a of the hose pipe 11 is screwed into the male thread of the branch pipe portion 4 b of the branch pipe 4 to connect the branch pipe 4 to the hose pipe 11 in a watertight and detachable manner.
After configuring a part of the branch drainage pipe as described above, each member is carried into the construction site, and construction is performed as follows.
At the construction site, first, a cabinet, a pedestal, and the like are installed, and then a wash bowl S is arranged thereon to constitute a wash basin. Moreover, an opening is provided in the floor surface under the cabinet in this case, and the pipe body is configured to be connected to an underfloor pipe connected to the underfloor space connected from the opening portion to the sewage side.
Next, the flange portion 6 of the branch pipe 4 is brought into contact with the lower surface of the peripheral edge of the drain port 1 of the wash bowl S, and the screw member 18a is screwed into the screw member 18a through a plurality of holes 6a provided in the flange portion 6. The branch pipe 4 is connected and fixed to the wash bowl S by screwing into the portion 18b (as described above, it is connected in a watertight manner using packing as necessary).
In this connection, the branch pipe portion 4b is arranged so as to face the side drainage port 2 side.
Next, after the upstream end of the elbow pipe 10 is brought into contact with the back surface of the peripheral edge of the side opening H2 of the wash bowl S, the side drainage main body 9 is inserted into the side opening H2, and the side drainage is performed. The male screw of the mouth main body 9 is screwed into the female screw of the elbow pipe 10 and tightened.
In this way, by holding the peripheral edge of the side opening H2 between the flange 9a of the side drain main body 9 and the upstream end of the elbow pipe 10, the side drain main body 9 and the elbow pipe 10 are wash bowls. The connection is fixed to S.
Further, the upstream end of the trap pipe 8 is connected to the lower end of the branch pipe 4, and the downstream end of the trap pipe 8 is connected to the underfloor pipe. Is completed.
Since the branch pipe portion 4b of the branch pipe 4 is constructed and connected as described above, the drain pipe of the present embodiment is normally closed, and the reverse flow is opened only when drainage is generated from the side drain port 2. A drain pipe provided with the prevention valve 3 in the branch pipe portion 4 b of the branch pipe 4.

上記のように構成した配管構造において、洗面台を使用し、洗面ボウルＳ内に排水が発生すると、排水は、洗面ボウルＳ底面の排水口１から、枝付き管４の主管部４ａ内部、トラップ管８、の順に通過し、最終的には床下配管から下水側に排出される。
また、上記排水口１に、図７のように蓋部材１７を配置して排水口１からの排水が行われないようにした上で、洗面ボウルＳ内に吐水を行うと、吐水は排出されること無く洗面ボウルＳ内に吐水が溜まってゆく。溜まった吐水の水位が側面排水口２の下端よりも上方に達すると、洗面ボウルＳ内に溜まった吐水は側面排水口２から、側面排水口本体９内部、エルボ管１０、ホース管１１、枝付き管４の枝管部４ｂから、（排水口１からの排水の場合と同様に）枝付き管４の主管部４ａ内、トラップ管８、の順に通過し、最終的には床下配管から下水側に排出される。
尚、上記のように側面排水口２から排水が行われる場合、排水が枝管部４ｂ内を通過する際に、図７に示したように排水の水圧によって枝管部４ｂの内部で弁本体１５が回転軸１５ｂを中心に回動して排水の流路を開放し、排水の通過が行われる。排水が終了し、枝管部４ｂ内から排水が無くなると、弁本体１５は再び弁本体１５の自重によって垂立した状態となることで弁座部１６ａに当接し、排水の流路を閉塞する。
また、この逆流防止弁３の弁体１５ａを排水が通過する際には、前述のように、突起部分４ｃによって弁体１５ａの開口の程度がコントロールされ、弁体１５ａの平面と、主管部４ａの弁体１５ａに対向する面とが成す角度（図７のＡで示される角度）が最大でも略４５度以下となるように構成されてなる。これにより、弁体１５ａが一種のガイドとなって、枝管部４ｂに対向する主管部４ａの壁面に対し、排水は４５度より小さい角度で衝突することとなり、衝突の衝撃が小さくなり、本管部へ合流する際に、合流がスムーズに行われて乱流の発生を防ぎ、排水性能を良好なものとすることができる。
また、上記のようにして排水が行われた際に、トラップ管８内に排水が溜まることで、トラップ管８が、下流側からの臭気や害虫類の逆流を防止する「封水式排水トラップ」となることは、第一実施例で記載した通りである。 In the piping structure configured as described above, when a wash basin is used and wastewater is generated in the washbasin bowl S, the wastewater is discharged from the drain port 1 on the bottom surface of the washbasin bowl S to the inside of the main pipe portion 4a of the branch pipe 4 and the trap. It passes through the pipe 8 in this order, and is finally discharged from the underfloor piping to the sewage side.
In addition, when the lid member 17 is disposed at the drain outlet 1 as shown in FIG. 7 so that drainage from the drain outlet 1 is not performed, and water is discharged into the wash bowl S, the water discharge is discharged. Water is accumulated in the wash bowl S without any problems. When the accumulated water level reaches above the lower end of the side drain port 2, the water accumulated in the wash bowl S passes from the side drain port 2 to the inside of the side drain port body 9, elbow pipe 10, hose pipe 11, branch From the branch pipe part 4b of the auxiliary pipe 4, it passes through the main pipe part 4a of the branch pipe 4 in the order of the trap pipe 8 (as in the case of drainage from the drain port 1), and finally the sewage from the underfloor pipe Discharged to the side.
When drainage is performed from the side drainage port 2 as described above, when the drainage passes through the branch pipe part 4b, the valve main body is formed inside the branch pipe part 4b by the water pressure of the drainage as shown in FIG. 15 rotates around the rotating shaft 15b to open the drainage flow path, and the drainage passes. When drainage is completed and drainage is eliminated from the branch pipe portion 4b, the valve body 15 comes into a suspended state again due to the weight of the valve body 15 and thereby comes into contact with the valve seat portion 16a to close the drainage flow path. .
When drainage passes through the valve body 15a of the backflow prevention valve 3, as described above, the degree of opening of the valve body 15a is controlled by the protruding portion 4c, and the plane of the valve body 15a and the main pipe portion 4a are controlled. The angle formed by the surface facing the valve body 15a (the angle indicated by A in FIG. 7) is about 45 degrees or less at the maximum. Thereby, the valve body 15a becomes a kind of guide, and the drainage collides with the wall surface of the main pipe part 4a facing the branch pipe part 4b at an angle smaller than 45 degrees, and the impact of the collision is reduced. When joining to a pipe part, joining is performed smoothly and generation | occurrence | production of a turbulent flow can be prevented and drainage performance can be made favorable.
Further, when drainage is performed as described above, the trap pipe 8 prevents the backflow of odors and pests from the downstream side by collecting the drainage in the trap pipe 8 "sealed drain trap. Is as described in the first embodiment.

上記のように構成した配管構造において、洗面台にて石鹸・洗剤などを使用し、洗面ボウルＳ内に泡混じりの排水を発生させた上で、この排水を排水口１から排出した場合、泡混じりの排水は、洗面ボウルＳ底面の排水口１から、枝付き管４の主管部４ａ内部、トラップ管８、の順に通過し、最終的には床下配管から下水側に排出される。
この場合において、第一実施例と同様に、排水配管上に封水式排水トラップを備えたことで、排水中の泡が下流側に流出しにくくなる状態が発生する。
この場合に、泡は封水の水面上から堆積してゆき、枝付き管４の主管部４ａ内部に充満するが、本実施例では枝付き管４の枝管部４ｂ内において、常時は閉塞し、側面排水口２から排水を生じた場合のみ開口する逆流防止弁３を備えてなる。具体的には、枝管部４ｂの内部において、弁本体１５が弁座部１６ａに通常時当接すると共に、下流側から上流側へ泡の圧力が生じても、そのまま弁本体１５の弁体１５ａが、弁座部１６ａに強く当接して、確実に泡の逆流を防止する。
このため、排水中に石鹸・洗剤などに由来する泡が混入していても、継手管１２の逆流防止弁３によって逆流が防止され、側面排水口２から泡が逆流して溢れ出す、ということは無い。 In the piping structure configured as described above, when soap and detergent are used in the washstand and foamy wastewater is generated in the washbasin S, the wastewater is discharged from the drain outlet 1 The mixed waste water passes from the drain port 1 on the bottom surface of the wash bowl S to the inside of the main pipe portion 4a of the branch pipe 4 and the trap pipe 8, and is finally discharged from the underfloor pipe to the sewage side.
In this case, as in the first embodiment, the provision of the sealed drain trap on the drain pipe causes a state in which bubbles in the drain are less likely to flow downstream.
In this case, the foam accumulates from the surface of the sealed water and fills the inside of the main pipe portion 4a of the branch pipe 4. In this embodiment, the foam is always blocked in the branch pipe section 4b of the branch pipe 4. The backflow prevention valve 3 is opened only when drainage is generated from the side drainage port 2. Specifically, inside the branch pipe portion 4b, the valve body 15 normally contacts the valve seat portion 16a, and even if foam pressure is generated from the downstream side to the upstream side, the valve body 15a of the valve body 15 is maintained as it is. However, it strongly abuts against the valve seat portion 16a and reliably prevents the backflow of bubbles.
For this reason, even if bubbles derived from soap, detergent, etc. are mixed in the drainage, the backflow prevention valve 3 of the joint pipe 12 prevents the backflow, and the bubbles backflow and overflow from the side drainage port 2. There is no.

また、上記枝管部４ｂの逆流防止弁３が、第一実施例と同様に、排水中の塵芥や油分、また泡の原因となった石鹸・洗剤成分などの汚濁物質、また弁本体１５の破損等によって動作異常を生じる場合があるが、本実施例では、枝管部４ｂの端部とホース管１１とをナット部材１１ａを利用して接続しており、ナット部材１１ａの螺合を緩めることで、ホース管１１と枝管部４ｂとを容易に着脱・分離することができる。これにより、弁本体１５や弁押え部材１６を取り出して各部材や枝管部４ｂ内部を清掃し、また弁本体１５や弁押え部材１６が破損していた場合は部材の交換を行う等した上で、再度ホース管１１と枝管部４ｂとを接続することで、容易に動作異常を解消したり、破損の修理作業を行うことができる。
即ち、本実施例では、逆流防止弁３を備えた枝排水管の管体である枝管部４ｂが、他の枝排水管の部材であるホース管１１に対して着脱自在に構成され、着脱により開放された箇所から弁体１５ａを枝排水管外に取り出して部材交換や清掃が可能に構成されてなる。 In addition, the backflow prevention valve 3 of the branch pipe portion 4b is similar to the first embodiment in that dust and oil in the drainage, pollutants such as soap / detergent components that cause bubbles, Although malfunction may occur due to breakage or the like, in this embodiment, the end of the branch pipe portion 4b and the hose pipe 11 are connected using the nut member 11a, and the screwing of the nut member 11a is loosened. Thereby, the hose pipe | tube 11 and the branch pipe part 4b can be attached or detached easily and isolate | separated. As a result, the valve body 15 and the valve pressing member 16 are taken out to clean the inside of each member and the branch pipe portion 4b, and when the valve main body 15 and the valve pressing member 16 are damaged, the members are replaced. Thus, by connecting the hose pipe 11 and the branch pipe portion 4b again, it is possible to easily eliminate the operation abnormality or to repair the damage.
That is, in this embodiment, the branch pipe portion 4b which is a pipe body of the branch drainage pipe provided with the backflow prevention valve 3 is configured to be detachable from the hose pipe 11 which is a member of another branch drainage pipe. The valve body 15a is taken out of the branch drainage pipe from the position opened by the above, and can be replaced or cleaned.

本発明の実施例は以上のようであるが、本発明は上記実施例に限定される物ではなく、主旨を変更しない範囲において自由に変更が可能である。
例えば上記実施例においては、排水配管が施工される排水機器は洗面台の洗面ボウルＳであるが、本発明は上記実施例に限定されるものでは無く、浴槽の排水配管や、流し台の排水配管など、どの様な排水機器の排水配管に採用しても構わない。
また、上記実施例では、枝付き管４の主管部４ａを鉛直方向に、枝管部４ｂを水平方向に、それぞれ配置してなるが、本発明は上記実施例に限定されるものでは無く、主管部４ａを水平方向に、枝管部４ｂを略鉛直方向に配置する等しても構わない。
また、上記実施例では、枝付き管４の主管部４ａと枝管部４ｂとはほぼ９０度となるように構成されてなるが、本発明は上記実施例に限定されるものでは無く、主管部４ａに対して枝管部を例えば７０度など傾斜する角度にて構成しても構わない。
また、上記実施例では、逆流防止弁３を側面排水口２からの流路上に配置して構成してなるが、本発明は上記実施例に限定されるものでは無く、排水口１からの流路上であって、側面排水口２からの排水が合流する開口箇所に逆流防止弁３を配置するように構成しても構わない。 The embodiments of the present invention are as described above. However, the present invention is not limited to the above-described embodiments, and can be freely changed without departing from the scope of the present invention.
For example, in the above embodiment, the drainage device on which the drainage pipe is constructed is the washbasin bowl S of the washstand, but the present invention is not limited to the above embodiment, and the drainage pipe of the bathtub or the drainage pipe of the sink For example, it may be used for drainage piping of any drainage equipment.
Moreover, in the said Example, although the main pipe part 4a of the branch pipe 4 is arrange | positioned in the perpendicular direction and the branch pipe part 4b is each arrange | positioned, this invention is not limited to the said Example, The main pipe portion 4a may be disposed in the horizontal direction, the branch pipe portion 4b may be disposed in the substantially vertical direction, and the like.
Moreover, in the said Example, although the main pipe part 4a and the branch pipe part 4b of the branch pipe 4 are comprised so that it may become substantially 90 degree | times, this invention is not limited to the said Example, A main pipe You may comprise a branch pipe part with the angle which inclines with respect to the part 4a, such as 70 degree | times, for example.
Moreover, in the said Example, although the backflow prevention valve 3 is arrange | positioned and comprised on the flow path from the side surface drain port 2, this invention is not limited to the said Example, The flow from the drain port 1 is comprised. You may comprise so that the backflow prevention valve 3 may be arrange | positioned on the road and the opening location where the waste_water | drain from the side surface drain port 2 merges.

１排水口２側面排水口
３逆流防止弁３ａヒンジ部
４枝付き管４ａ主管部
４ｂ枝管部４ｃ突起部分
５排水口本体５ａ貫通孔
６フランジ部６ａ穴部
７テールピース管８トラップ管
９側面排水口本体９ａ鍔部
１０エルボ管１１ホース管
１１ａナット部材１２継手管
１３継手管本体１４溝部
１５弁本体１５ａ弁体
１５ｂ回転軸１６弁押え部材
１６ａ弁座部１７蓋部材
１８ａビス部材１８ｂネジ穴部
Ｓ洗面ボウルＨ１底面開口部
Ｈ２側面開口部 DESCRIPTION OF SYMBOLS 1 Drain port 2 Side drain port 3 Backflow prevention valve 3a Hinge part 4 Branched pipe 4a Main pipe part 4b Branch pipe part 4c Projection part 5 Drain port body 5a Through-hole 6 Flange part 6a Hole part 7 Tail piece pipe 8 Trap pipe 9 Side face Drainage port main body 9a Hook 10 Elbow pipe 11 Hose pipe 11a Nut member 12 Joint pipe 13 Joint pipe main body 14 Groove 15 Valve body 15a Valve body 15b Rotating shaft 16 Valve presser member 16a Valve seat part 17 Lid member 18a Screw member 18b Screw hole Part S Washing bowl H1 Bottom opening H2 Side opening

Claims

A drain outlet provided on the bottom of the tank body;
A side drain provided on the side of the tank body;
A main drain pipe that discharges drainage from the drain to the sewage side;
A branch drainage pipe that drains the drainage from the side drainage port to the middle part of the main drainage pipe,
In the drainage pipe of the tank body consisting of
A backflow prevention valve that is always closed to prevent backflow of bubbles from the drainage outlet to the side drainage outlet and opens only when drainage is generated from the side drainage outlet and allows water to flow to the main drainage pipe side. Drainage pipe characterized by having.

A drainage pipe characterized in that in the drainage pipe, a backflow prevention valve is provided in a side drainage port or a branch drainage pipe.

In the above drain pipe,
Provided with a branch pipe comprising a main pipe portion which is provided on the main drain pipe or a pipe body provided along the main drain pipe, a branch pipe portion extending from a side surface of the main pipe portion,
The main pipe part of the branch pipe is connected to the main drain pipe side, the branch pipe part is connected to the pipe from the side drain port,
The drainage pipe according to claim 1 or 2, wherein a backflow prevention valve is provided in the branch pipe part.

In the above drain pipe,
Provided with a branch pipe comprising a main pipe portion which is provided on the main drain pipe or a pipe body provided along the main drain pipe, a branch pipe portion extending from a side surface of the main pipe portion,
The main pipe part of the branch pipe is connected to the main drain pipe side, the branch pipe part is connected to the pipe from the side drain port,
The drainage pipe according to claim 1 or 2, wherein a joint pipe having a backflow prevention valve is connected to an end of the branch pipe part.

In the drainage pipe, the backflow prevention valve is
A plate-shaped valve body;
A hinge portion for rotatably attaching the valve body to the tube body;
A valve seat provided on the tube body and in contact with the valve body;
Consists of
Normally, the valve body is in contact with the inner surface of the tube to prevent the backflowing drainage and the passage of bubbles in the drainage,
The drainage pipe according to any one of claims 1 to 4, wherein drainage is performed by draining water from a side drainage port or passing bubbles in drainage while being separated from the inner surface of the pipe body during drainage. .

In the above drain pipe,
The pipe body provided with the backflow prevention valve is configured to be detachable with respect to other branch drainage pipe members, and the valve body can be taken out of the branch drainage pipe from a position opened by the detachment. The drainage pipe according to claim.

In the above drain pipe,
The opening angle of the valve body of the backflow prevention valve is limited so that the drainage that has passed through the valve body collides with the wall surface of the pipe body facing the valve body at an angle smaller than about 45 degrees. The drainage pipe according to any one of claims 1 to 6, wherein the drainage pipe is characterized.