JP4801572B2

JP4801572B2 - Underfloor drainage piping system

Info

Publication number: JP4801572B2
Application number: JP2006329016A
Authority: JP
Inventors: 昭博圓谷
Original assignee: Aron Kasei Co Ltd
Current assignee: Aron Kasei Co Ltd
Priority date: 2006-12-06
Filing date: 2006-12-06
Publication date: 2011-10-26
Anticipated expiration: 2026-12-06
Also published as: JP2008144355A

Description

本発明は建物の床下に排水される配管システムに関する。より詳しくは、台所、風呂場、洗濯機、洗面所、手洗い等の屋内排水器具から排出される雑排水や、トイレから排出される汚水等を、建物の床下の配管から建物の基礎を貫通して屋外の排水マスに導き、更に公共マスへ排水する床下排水配管マスシステムに関する。 The present invention relates to a piping system drained under a floor of a building. More specifically, sewage discharged from indoor drainage equipment such as kitchens, bathrooms, washing machines, washrooms, and hand-washing, and sewage discharged from toilets, penetrates the foundation of the building from the piping under the building floor. It relates to an underfloor drain piping mass system that leads to an outdoor drainage mass and further drains to a public mass.

従来、戸建住宅や小規模集合住宅の屋内等で生じる排水は、台所、風呂場、洗濯機、洗面所、手洗い、トイレ等の屋内排水器具から排水管を介して屋外の排水マスへそれぞれ排水されていた。しかし、このような配管では建物の基礎を貫通する貫通孔をその数だけ開けることとなり基礎の強度低下という問題を抱えたいた。そこで、トイレ、洗面所、洗濯機、浴室、台所などの各種排水器具にて発生した排水を、ヘッダー（５個の９０度大曲りＹ継手を管軸方向に短管を介して接着接続して構成されている）に集めてそこから排水主管を介して屋外の排水マスへ排水され、公共マスへと排水される排水システムが知られている。（特開２００２−６１２４７号） Conventionally, drainage generated indoors in detached houses and small apartments is drained from indoor drainage devices such as kitchens, bathrooms, washing machines, washrooms, hand-washing, toilets, etc. to outdoor drainage masses via drainage pipes. It had been. However, such piping has the problem that the number of through-holes that penetrate the foundation of the building is opened and the strength of the foundation is lowered. Therefore, the wastewater generated by various drainage devices such as toilets, washrooms, washing machines, bathrooms, kitchens, etc. is connected to the header (five 90 degree large bend Y joints in the tube axis direction via a short pipe. A drainage system is known in which the wastewater is drained to an outdoor drainage mass through a drainage main pipe and drained to a public mass. (JP 2002-61247 A)

また、前記排水器具からの排水を排水枝管を介して集合マスに集水して、排水主管の下流側をバイパス管路付段差接合管路を介して屋外の排水マスへ排水され、公共マスへと排水される排水用床下配管設備が知られている。（特開２００３−１４７８２６号）
上記特許文献では、一度に流入する排水が合流して管内に負圧を発生させないようにするため、通気弁やバイパス通気管を設けたり、内周面に螺旋状の案内板を形成した継手を介在させたり、排水主管を偏芯して接続したり、特別な継手を使用したり、などして、各排水器具での封水破壊が生じないようにしている。 In addition, the drainage from the drainage device is collected in a collecting mass via a drainage branch pipe, and the downstream side of the drainage main pipe is drained to an outdoor drainage mass via a step junction pipe line with a bypass pipe. There are known underfloor piping facilities for draining water. (Japanese Patent Laid-Open No. 2003-147826)
In the above-mentioned patent document, in order to prevent the wastewater flowing in at a time from joining and generating negative pressure in the pipe, a joint having a ventilation valve or a bypass ventilation pipe or a spiral guide plate formed on the inner peripheral surface is used. By interposing, connecting the drain main pipes eccentrically, using special joints, etc., the sealing failure in each drainage device is prevented.

しかしながら、従来の施工では、通気弁やバイパス通気管を設けたり、内周面に螺旋状の案内板を形成した継手を介在させたり、排水主管を偏芯して接続したり、特別な継手を使用したりなどしているので、通気弁や特殊な継手が必要であり、別途にその配管工事をしなければならず、しかも、トイレ汚水の配管は別途にしなければならないなど、工事に手間を要し、施工に時間がかかる、引いてはコストアップに繋がるという不具合が生じていた。
特開２００２−６１２４７号公報特開２００３−１４７８２６号公報 However, in conventional construction, a vent valve or bypass vent pipe is provided, a joint with a spiral guide plate formed on the inner peripheral surface, a drain main pipe is eccentrically connected, or a special joint is installed. Since it is used, a vent valve and a special joint are necessary, and the piping work must be done separately. In short, the construction takes time, and in turn, there is a problem that it leads to cost increase.
JP 2002-61247 A JP 2003-147826 A

本発明は、上記の不具合を解消するため鋭意検討の結果、従来から使用されている継手を用い、屋内側でトイレを合流させても、管路内に負圧を発生させることなく、各排水設備の封水破壊を防止し、施工工事が簡単で少ない時間で工事をおえることが出来、トータルコストを削減できる床下排水配管システムの提供を課題とする。 As a result of intensive studies to eliminate the above problems, the present invention uses a joint that has been used in the past, and each drainage without generating negative pressure in the pipeline even when the toilets are joined indoors. The objective is to provide an underfloor drainage piping system that can prevent the destruction of the sealing water of the equipment, can perform the construction work in a short time, and can reduce the total cost.

上記課題を達成するための本発明の床下配管排水システムは、建物の床下において配管される床下排水配管システムであって、建物内の各排水設備からの排水を複数の枝管を介して集水ヘッダに集水し、該集水ヘッダから排水主管を介して屋外の排水マスへ排水するにあたり、該集水ヘッダに接続される上流側排水主管と該屋外の排水マスに接続される下流側排水主管との間に、４５度Ｙ継手を介在させて、４５度に傾斜した流路および落差を形成し、該４５度Ｙ継手の接続部にトイレ汚水を建物基礎の屋内側で配管接続し、下流側排水主管が建物の基礎を貫通して屋外の排水マスへ排水することを特徴とする床下排水配管システムである。
また、建物の床下において配管される床下排水配管システムであって、建物内の各排水設備からの排水を複数の枝管を介して集水ヘッダに集水し、該集水ヘッダから排水主管を介して屋外の排水マスへ排水するにあたり、該集水ヘッダに接続される上流側排水主管と該屋外の排水マスに接続される下流側排水主管との間に、４５度Ｙ継手の上流側で４５度エルボ継手２個を接続して上下４５度に傾斜させて流路および落差を形成し、４５度Ｙ継手を介在させて、該４５度Ｙ継手の接続部にトイレ汚水を建物基礎の屋内側で配管接続し、下流側排水主管が建物の基礎を貫通して屋外の排水マスへ排水することを特徴とする床下排水配管システムである。
さらに、建物の屋内および屋外に通気構造を別途に設けることなく排水配管することを特徴とする床下排水配管システムである。 An underfloor piping drainage system according to the present invention for achieving the above object is an underfloor drainage piping system piped under a building floor, and collects drainage from each drainage facility in the building through a plurality of branch pipes. When collecting water to the header and draining from the water collection header to the outdoor drainage mass via the drainage main pipe, the upstream side drainage main pipe connected to the water collection header and the downstream side drainage connected to the outdoor drainage mass A 45 degree Y joint is interposed between the main pipe and a 45 degree inclined channel and drop, and toilet sewage is connected to the connecting part of the 45 degree Y joint on the indoor side of the building foundation. It is an underfloor drainage piping system characterized in that a downstream drainage main pipe passes through a building foundation and drains to an outdoor drainage mass.
Further, it is an underfloor drainage piping system that is piped under the floor of a building, and collects drainage from each drainage facility in the building through a plurality of branch pipes into a catchment header, and the drainage main pipe is routed from the catchment header. Between the upstream drainage main pipe connected to the water collection header and the downstream drainage main pipe connected to the outdoor drainage mass, on the upstream side of the 45 degree Y joint. Two 45 degree elbow joints are connected and inclined to 45 degrees up and down to form a flow path and a drop, 45 degree Y joints are interposed, and toilet sewage is connected to the connecting part of the 45 degree Y joints. It is an underfloor drainage piping system characterized in that piping is connected inside, and a downstream drainage main pipe penetrates the foundation of the building and drains to an outdoor drainage mass.
Further, the present invention is an underfloor drainage piping system characterized in that drainage piping is performed without separately providing a ventilation structure indoors and outdoors in a building.

本発明に係る集水ヘッダは、特開２００３−１４７８２６号公報に示す空気アキュムレータの機能をもった集水マスあるいは単に複数の枝管接続部を有する集水マス、または特開２００２−６１２４７号公報、特開２００６−７７５２８号公報、２００６−１６７７９号公報、特開２００６−１６７８０号公報に示すヘッダあるいは筒状体の周囲に複数の枝管接続部を有するヘッダのいずれのものでもよい。 The water collection header according to the present invention is a water collection mass having the function of an air accumulator shown in Japanese Patent Application Laid-Open No. 2003-147826, or a water collection mass having a plurality of branch pipe connections, or Japanese Patent Application Laid-Open No. 2002-61247. Any of the headers shown in JP-A-2006-77528, 2006-16779, and JP-A-2006-16780, or a header having a plurality of branch pipe connection portions around the cylindrical body may be used.

本発明に係る集水ヘッダ、排水主管、継手等は、硬質塩化ビニル製が望ましく、枝管は、ポリエチレン、ポリプロピレン等のオレフィン樹脂製の可とう管（コルゲート管）が望ましい。 The water collection header, drain main pipe, joint and the like according to the present invention are preferably made of hard vinyl chloride, and the branch pipe is preferably a flexible pipe (corrugated pipe) made of olefin resin such as polyethylene or polypropylene.

本発明の床下排水配管システムによれば、４５度Ｙ継手を用いることで４５度に傾斜した流路と落差を形成でき、エルボ継手を用いるだけでトイレ汚水が簡単に配管でき、建物の基礎Ａの近傍の位置で配管できるので建物の基礎Ａに沿わせて配管が可能であり、建物の基礎を貫通する貫通孔は一つで良いので建物の基礎を弱体化させる恐れもない。また、４５度Ｙ継手の接続方向を工夫するだけで、トイレからの配管に合わせて接続位置を選択することができ、接続工事を簡単にすることができる
また、汎用の４５度Ｙ継手やエルボ継手だけを用いて工事ができ、特殊な継手や通気弁を設ける必要もなくなるので工事が簡単で手間がかからず、工事費が安く、施工コストを節約できる。
さらに、トイレ汚水をスムーズに合流して流すことができ、上流側に負圧を発生させることもなく、各排水設備器具の封水破壊も防止することができる。 According to the underfloor drainage piping system of the present invention, a 45 ° Y-joint can be used to form a flow path and a head inclined at 45 °, and toilet sewage can be easily piped simply by using an elbow joint. Since piping can be made along the foundation A of the building since only one through-hole penetrating the foundation of the building is sufficient, there is no fear of weakening the foundation of the building. In addition, simply by devising the connection direction of the 45 degree Y joint, the connection position can be selected according to the piping from the toilet, and the connection work can be simplified. Work can be done using only joints, and there is no need to install special joints or vent valves, making the work simple and labor-saving, and the construction costs are low, thus saving construction costs.
Furthermore, toilet sewage can be smoothly merged and flowed, no negative pressure is generated on the upstream side, and sealing failure of each drainage equipment can be prevented.

以下の図面を参照して、本発明に係る実施形態について説明する。
図１乃至図１５は、本発明の実施形態に係る床下排水配管システムの配管状態を示す図である。図１乃至図３は実施例１図であり、図１は実施例１のＡ−Ａ断面図、図２は実施例１の平面図、図３は実施例１のＢ−Ｂ断面図である。図４乃至図６は実施例２の図であり、図４は実施例２のＡ−Ａ断面図、図５は実施例２の平面図、図６は実施例２のＢ−Ｂ断面図である。図７乃至図９は実施例３の図であり、図７は実施例３のＡ−Ａ断面図、図８は実施例３の平面図、図９は実施例３のＢ−Ｂ断面図である。図１０乃至図１２は実施例４の図であり、図１０は実施例４のＡ−Ａ断面図、図１１は実施例４の平面図、図１２は実施例４のＢ−Ｂ断面図である。図１３乃至図１５は実施例５の図であり、図１３は実施例５のＡ−Ａ断面図、図１４は実施例５の平面図、図１５は実施例５のＢ−Ｂ断面図である。
図中、１は複数の枝管接続部と一つの排水主管接続部を有する集水マスであり、２は枝管でオレフィン樹脂製の可とう管（コルゲート管ともいう）であり、３は硬質塩化ビニル製の４５度Ｙ継手（下水排水に汎用されているＤＶ継手）である。４は排水主管であり、４ａは上流側排水主管、４ｂは下流側排水主管、５は屋外排水マス、６は屋外排水管、７はトイレからの管路であるトイレ汚水排水管である。 Embodiments according to the present invention will be described with reference to the following drawings.
1 to 15 are views showing a piping state of the underfloor drainage piping system according to the embodiment of the present invention. FIGS. 1 to 3 are diagrams of the first embodiment, FIG. 1 is a cross-sectional view taken along the line AA of the first embodiment, FIG. 2 is a plan view of the first embodiment, and FIG. . 4 to 6 are views of the second embodiment, FIG. 4 is a cross-sectional view taken along the line AA of the second embodiment, FIG. 5 is a plan view of the second embodiment, and FIG. is there. 7 to 9 are views of the third embodiment. FIG. 7 is a cross-sectional view taken along the line AA of the third embodiment, FIG. 8 is a plan view of the third embodiment, and FIG. is there. 10 to 12 are diagrams of the fourth embodiment, FIG. 10 is a cross-sectional view taken along the line AA of the fourth embodiment, FIG. 11 is a plan view of the fourth embodiment, and FIG. is there. FIGS. 13 to 15 are views of the fifth embodiment, FIG. 13 is a cross-sectional view taken along the line AA of the fifth embodiment, FIG. 14 is a plan view of the fifth embodiment, and FIG. is there.
In the figure, 1 is a water collecting mass having a plurality of branch pipe connection parts and one drain main pipe connection part, 2 is a branch pipe made of olefin resin (also called a corrugated pipe), and 3 is hard. It is a 45 degree Y joint (DV joint widely used for sewage drainage) made of vinyl chloride. 4 is a drainage main pipe, 4a is an upstream drainage main pipe, 4b is a downstream drainage main pipe, 5 is an outdoor drainage mass, 6 is an outdoor drainage pipe, and 7 is a toilet sewage drainage pipe that is a conduit from the toilet.

第１の実施形態を図１乃至図３を参照して説明する。
複数の枝管接続部１ａ，１ｂ，１ｃ，１ｄ，１ｅと排水主管接続部１ｆとを有する集水マス１に、建物内の各排水設備（図示しない）からの枝管２がそれぞれ接続され、排水主管接続部１ｆに上流側排水主管４ａが接続されている。上流側排水主管４ａの下流は４５度エルボ継手を介して４５度Ｙ継手３の上流側接続部３ａに接続され、４５度Ｙ継手３の下流側接続部３ｂは４５度エルボ継手を介して下流側排水主管４ｂに接続され、下流側排水主管４ｂが建物の基礎Ａを貫通して９０度エルボ継手や短管等を介して屋外排水マス５に接続されている。そして、４５度Ｙ継手３の枝管接続部３ｃにトイレからのトイレ汚水排水管７が９０度エルボ継手等を介して接続されている。屋外排水マス５には公共マスに通じている屋外排水管６が接続されている。 A first embodiment will be described with reference to FIGS. 1 to 3.
A branch pipe 2 from each drainage facility (not shown) in the building is connected to a water collecting mass 1 having a plurality of branch pipe connection portions 1a, 1b, 1c, 1d, 1e and a drain main pipe connection portion 1f, The upstream drain main pipe 4a is connected to the drain main pipe connecting portion 1f. The downstream side of the upstream drainage main pipe 4a is connected to the upstream side connection part 3a of the 45 degree Y joint 3 via a 45 degree elbow joint, and the downstream side connection part 3b of the 45 degree Y joint 3 is downstream via the 45 degree elbow joint. It is connected to the side drain main pipe 4b, and the downstream side drain main pipe 4b penetrates the foundation A of the building and is connected to the outdoor drainage mass 5 through a 90 degree elbow joint, a short pipe and the like. And the toilet sewage drain pipe 7 from the toilet is connected to the branch pipe connecting part 3c of the 45 degree Y joint 3 through a 90 degree elbow joint or the like. An outdoor drain pipe 6 connected to the public mass is connected to the outdoor drain mass 5.

建物の基礎Ａの屋内側近傍で、上流側排水主管４ａと下流側排水主管４ｂとに落差を設け、４５度Ｙ継手３を上流側接続部３ａと下流側接続部３ｂとが上下に４５度の傾斜でかつ枝管接続部３ｃが水平方向になるように配置し、上流側排水主管４ａが４５度Ｙ継手３の上流側接続部３ａと下流側排水主管４ｂが４５度Ｙ継手３の下流側接続部３ｂとを４５度エルボ継手を介して接続し、４５度Ｙ継手３の流路が４５度に傾斜してかつ落差をもって接続され、４５度Ｙ継手３の枝側接続部３ｃにトイレからのトイレ汚水排水管７がエルボ継手を介して水平方向に後方側から雑排水の流れに合流するよう配管されている。
従って、トイレ汚水が上流側排水主管４ａに逆流することなく、また雑排水とトイレ汚水が合流しても上流側に負圧が発生することなく、屋内の各排水設備器具での封水破壊を防止できると共に、下流側へスムースに流れる。 Near the indoor side of the building foundation A, a drop is provided between the upstream drainage main pipe 4a and the downstream drainage main pipe 4b, and the 45 degree Y joint 3 is 45 degrees up and down with the upstream connection part 3a and the downstream connection part 3b. Are arranged so that the branch pipe connecting portion 3c is in the horizontal direction, the upstream drainage main pipe 4a is downstream of the 45 degree Y joint 3 and the upstream connecting part 3a of the 45 degree Y joint 3 is downstream of the 45 degree Y joint 3. The connecting part 3b is connected via a 45 degree elbow joint, the flow path of the 45 degree Y joint 3 is inclined at 45 degrees and connected with a drop, and the branch side connecting part 3c of the 45 degree Y joint 3 is connected from the toilet. The toilet sewage drainage pipe 7 is piped so as to join the flow of miscellaneous drainage from the rear side in the horizontal direction via the elbow joint.
Therefore, the toilet sewage does not flow back to the upstream drainage main pipe 4a, and even if miscellaneous drainage and toilet sewage merge, no negative pressure is generated on the upstream side. It can be prevented and flows smoothly downstream.

第２の実施形態を図４乃至図６を参照して説明する。
図に示すように第２の実施形態は４５度Ｙ継手の枝側接続部３ｃが４５度上方へ向きになるように配置されて４５度エルボ継手を介して上流側排水主管４ａと接続され、４５度Ｙ継手の下流側接続部３ｂが下流側排水主管４ｂと接続され、上流側排水主管４ａと下流側排水主管４ｂとに落差と４５度に傾斜する流路を確保している。そして、４５度Ｙ継手の上流側接続部３ａが複数の９０度エルボ継手等を介してトイレ汚水排水管７と接続されている。
４５度Ｙ継手の上流側接続部３ａと４５度Ｙ継手の下流側接続部３ｂがほぼ水平になるように縦方向に配置して４５度Ｙ継手の下流側接続部３ｂと下流側排水主管４ｂとの間に使用する４５度エルボ継手を省くことによりトイレ汚水排水管７を建物の基礎Ａに沿わせて配管する事ができる。他は実施例１と同様である。 A second embodiment will be described with reference to FIGS.
As shown in the figure, the second embodiment is arranged such that the branch side connection portion 3c of the 45 degree Y joint is directed upward by 45 degrees, and is connected to the upstream drainage main pipe 4a via the 45 degree elbow joint, The downstream connection portion 3b of the 45 degree Y joint is connected to the downstream drainage main pipe 4b, and a flow path inclined at 45 degrees is secured between the upstream drainage main pipe 4a and the downstream drainage main pipe 4b. And the upstream connection part 3a of a 45 degree | times Y joint is connected with the toilet sewage drainage pipe 7 via the some 90 degree | times elbow joint.
The upstream connection part 3a of the 45 degree Y joint and the downstream connection part 3b of the 45 degree Y joint are arranged in the vertical direction so that they are substantially horizontal, and the downstream connection part 3b of the 45 degree Y joint and the downstream drainage main pipe 4b. The toilet sewage drain pipe 7 can be piped along the foundation A of the building by omitting the 45 ° elbow joint used between the two. Others are the same as in the first embodiment.

第３の実施形態を図７乃至図９を参照して説明する。
図に示すように第３の実施形態は、４５度Ｙ継手の上流側接続部３ａが４５度エルボ継手を介して上流側排水主管４ａと接続され、４５度Ｙ継手の下流側接続部３ｂが４５度エルボ継手を介して下流側排水主管４ｂと接続され、４５度Ｙ継手の枝側接続部３ｃが９０度エルボ継手を介してトイレ汚水排水管７と接続されている。このように４５度Ｙ継手を配置して配管するとトイレ汚水排水管７を建物の基礎Ａに沿わせて配管することができ、また４５度Ｙ継手の枝側接続部３ｃがベタ基礎Ａの表面から突出しているのでトイレ汚水排水管をベタ基礎工事の後で施工することもできる。更に９０度エルボ継手の首を振ることによりトイレ汚水排水管７の角度を合わせたり、あるいは図の反対側からのトイレ配管にも対応できる。他は実施例１と同様である。 A third embodiment will be described with reference to FIGS.
As shown in the figure, in the third embodiment, the upstream connection portion 3a of the 45 ° Y joint is connected to the upstream drainage main pipe 4a via the 45 ° elbow joint, and the downstream connection portion 3b of the 45 ° Y joint is The 45 degree elbow joint is connected to the downstream drainage main pipe 4b, and the 45 degree Y joint branch side connection part 3c is connected to the toilet sewage drainage pipe 7 via the 90 degree elbow joint. When the 45 degree Y joint is arranged and piped in this way, the toilet sewage drain pipe 7 can be piped along the foundation A of the building, and the branch side connection part 3c of the 45 degree Y joint is the surface of the solid foundation A. The toilet sewage drain pipe can be constructed after the solid foundation work. Furthermore, it is possible to adjust the angle of the toilet sewage drain pipe 7 by shaking the neck of the elbow joint 90 degrees, or to handle toilet piping from the opposite side of the figure. Others are the same as in the first embodiment.

第４の実施形態を図１０乃至図１２を参照して説明する。
図に示すように第４の実施形態は、４５度Ｙ継手を横方向（水平方向）に配置し、４５度Ｙ継手３の上流側で４５度エルボ継手２個を接続して上下４５度に傾斜させて落差を形成し、該４５度エルボ継手の上流側が上流側排水主管４ａと接続され、該４５度エルボ継手の下流側が４５度Ｙ継手３の上流側接続部３ａと接続され、４５度Ｙ継手３の下流側接続部３ｂが下流側排水主管４ｂと接続されている。そして、４５度Ｙ継手３の枝側接続部３ｃが４５度エルボ継手を介してトイレ汚水排水管７と接続されている。
なお、４５度エルボ継手２個の接続は、両受エルボ２個を短管で接続するか、片受エルボ２個を接続するか、両受エルボ１個と片受エルボ１個を接続してもよい。
トイレ汚水排水管７（図示しない）が建物の基礎Ａから離れた方向からきたときは、４５度Ｙ継手の枝側接続部３ｃに直接接続してもよく、また、図の反対の方向からトイレ汚水排水管７（図示しない）がきたときは、４５度Ｙ継手を反転させて接続することができる。
このように建物の基礎Ａに沿わせて配管することも、建物の基礎Ａから離れた位置で配管することも、反対側からの配管にも対応でき、トイレ汚水配管に自由度がある。他は実施例１と同様である。 A fourth embodiment will be described with reference to FIGS.
As shown in the figure, in the fourth embodiment, 45 degree Y joints are arranged in the horizontal direction (horizontal direction), and two 45 degree elbow joints are connected on the upstream side of the 45 degree Y joint 3 so as to be 45 degrees up and down. Inclined to form a head, the upstream side of the 45 degree elbow joint is connected to the upstream drainage main pipe 4a, the downstream side of the 45 degree elbow joint is connected to the upstream side connection part 3a of the 45 degree Y joint 3, and 45 degrees The downstream connection portion 3b of the Y joint 3 is connected to the downstream drainage main pipe 4b. And the branch side connection part 3c of the 45 degree | times Y coupling 3 is connected with the toilet sewage drainage pipe 7 via the 45 degree | times elbow joint.
In addition, two 45 degree elbow joints can be connected by connecting two receiving elbows with a short pipe, connecting two single receiving elbows, or connecting one receiving elbow and one single receiving elbow. Also good.
When the toilet sewage drain pipe 7 (not shown) comes from a direction away from the foundation A of the building, it may be directly connected to the branch side connection part 3c of the 45 degree Y joint, and the toilet from the opposite direction of the figure. When the sewage drain pipe 7 (not shown) comes, the 45 degree Y joint can be reversed and connected.
Thus, piping along the foundation A of the building, piping at a position away from the foundation A of the building, and piping from the opposite side can be handled, and the toilet sewage piping has a degree of freedom. Others are the same as in the first embodiment.

第５の実施形態を図１３乃至図１５を参照して説明する。
図に示すように第５の実施形態は、４５度Ｙ継手３の枝側接続部３ｃが４５度上方へ向き、４５度Ｙ継手３の上流側接続部３ａと４５度Ｙ継手３の下流側接続部３ｂがほぼ水平になるように縦方向に配置され、４５度Ｙ継手３の上流側で４５度エルボ継手２個を接続して上下４５度に傾斜させて落差を形成し、該４５度エルボ継手の上流側と上流側排水主管４ａとが接続され、該４５度エルボ継手の下流側と４５度Ｙ継手の上流側接続部３ａとが接続され、４５度Ｙ継手３の下流側接続部３ｂが下流側排水主管４ｂと接続されている。そして、４５度Ｙ継手３の枝側接続部３ｃが９０度エルボ継手を介してトイレ汚水排水管７と接続されている。他は実施例５と同様である。 A fifth embodiment will be described with reference to FIGS.
As shown in the figure, in the fifth embodiment, the branch side connection part 3c of the 45 degree Y joint 3 faces 45 degrees upward, and the upstream side connection part 3a of the 45 degree Y joint 3 and the downstream side of the 45 degree Y joint 3 The connecting portion 3b is arranged in a vertical direction so as to be substantially horizontal, and two 45 degree elbow joints are connected on the upstream side of the 45 degree Y joint 3 and tilted to 45 degrees up and down to form a head. The upstream side of the elbow joint and the upstream drainage main pipe 4a are connected, the downstream side of the 45 degree elbow joint and the upstream connection part 3a of the 45 degree Y joint are connected, and the downstream side connection part of the 45 degree Y joint 3 3b is connected to the downstream drainage main pipe 4b. And the branch side connection part 3c of 45 degree | times Y coupling 3 is connected with the toilet sewage drainage pipe 7 via the 90 degree | times elbow joint. Others are the same as in the fifth embodiment.

上記実施例１から５は、屋内側配管及び屋外側配管を同径で説明してるが、これに限定されるものではない。例えば、屋内側配管の口径を呼び径で７５ｍｍのパイプを使用し、下流側排水主管４ｂと接続されるパイプを異径エルボ継手を介在させて屋外側の配管を呼び径で１００ｍｍのパイプを使用してもよい。 Although the said Example 1-5 has demonstrated indoor side piping and outdoor side piping by the same diameter, it is not limited to this. For example, a pipe with a nominal diameter of 75 mm is used for the indoor side pipe, and a pipe with a nominal diameter of 100 mm is used for the pipe on the outdoor side with a different diameter elbow joint connected to the downstream drainage main pipe 4b. May be.

図２のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明に係る床下排水配管システムの第１実施形態を示す平面図である。It is a top view which shows 1st Embodiment of the underfloor drainage piping system which concerns on this invention. 図２のＢ−Ｂ線断面図である。FIG. 3 is a sectional view taken along line B-B in FIG. 2. 図５のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明に係る床下排水配管システムの第２実施形態を示す平面図である。It is a top view which shows 2nd Embodiment of the underfloor drainage piping system which concerns on this invention. 図５のＢ−Ｂ線断面図である。FIG. 6 is a sectional view taken along line B-B in FIG. 5. 図８のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明に係る床下排水配管システムの第３実施形態を示す平面図である。It is a top view which shows 3rd Embodiment of the underfloor drainage piping system which concerns on this invention. 図８のＢ−Ｂ線断面図である。It is the BB sectional drawing of FIG. 図１１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明に係る床下排水配管システムの第４実施形態を示す平面図である。It is a top view which shows 4th Embodiment of the underfloor drainage piping system which concerns on this invention. 図１１のＢ−Ｂ線断面図である。It is the BB sectional drawing of FIG. 図１４のＡ−Ａ線断面図である。It is AA sectional view taken on the line of FIG. 本発明に係る床下排水配管システムの第５実施形態を示す平面図である。It is a top view which shows 5th Embodiment of the underfloor drainage piping system which concerns on this invention. 図１４のＢ−Ｂ線断面図である。It is the BB sectional drawing of FIG.

Explanation of symbols

１集水ヘッダ
１ａ〜ｅ枝管接続部
１ｆ排水主管接続部
２枝管
３４５度Ｙ継手
３ａ４５度Ｙ継手の上流側接続部
３ｂ４５度Ｙ継手の下流側接続部
３ｃ４５度Ｙ継手の枝側接続部
４排水主管
４ａ上流側排水主管
４ｂ下流側排水主管
５屋外排水マス
６屋外排水管
７トイレ汚水排水管
Ａ建物の基礎（コンクリート製） DESCRIPTION OF SYMBOLS 1 Water collection header 1a-e Branch pipe connection part 1f Drain main pipe connection part 2 Branch pipe 3 45 degree Y joint 3a 45 degree Y joint upstream connection part 3b 45 degree Y joint downstream connection part 3c 45 degree Y joint Branch side connection 4 Drainage main pipe 4a Upstream drainage main pipe 4b Downstream drainage main pipe 5 Outdoor drainage mass 6 Outdoor drainage pipe 7 Toilet sewage drainage pipe A A building foundation (made of concrete)

Claims

An underfloor drainage piping system that is piped under a floor of a building, collecting drainage from each drainage facility in the building through a plurality of branch pipes into a water collection header, and from the water collection header through a drainage main pipe When draining to the outdoor drainage mass, a 45 degree Y joint is interposed between the upstream drainage main pipe connected to the water collection header and the downstream drainage main pipe connected to the outdoor drainage mass, and 45 A slanted channel and a drop are formed, and toilet sewage is connected to one of the 45-degree Y joints on the indoor side of the building foundation. An underfloor drainage piping system characterized by draining to a drainage mass.

An underfloor drainage piping system that is piped under a floor of a building, collecting drainage from each drainage facility in the building through a plurality of branch pipes into a water collection header, and from the water collection header through a drainage main pipe 45 degrees on the upstream side of the 45 degree Y joint between the upstream drain main pipe connected to the water collection header and the downstream drain main pipe connected to the outdoor drain mass. Two elbow joints are connected and inclined to 45 degrees up and down to form a flow path and a drop. A 45-degree Y joint is interposed, and toilet sewage is introduced into any of the connections of the 45-degree Y joint. An underfloor drainage piping system, characterized in that piping is connected indoors, and a downstream drainage main pipe penetrates the foundation of the building and drains it to an outdoor drainage mass.

3. The underfloor drainage piping system according to claim 1 or 2, wherein drainage piping is performed without separately providing a ventilation structure inside and outside the building.