JP2014043912A - Piping structure provided with check valve - Google Patents

Piping structure provided with check valve Download PDF

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JP2014043912A
JP2014043912A JP2012187080A JP2012187080A JP2014043912A JP 2014043912 A JP2014043912 A JP 2014043912A JP 2012187080 A JP2012187080 A JP 2012187080A JP 2012187080 A JP2012187080 A JP 2012187080A JP 2014043912 A JP2014043912 A JP 2014043912A
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backflow prevention
prevention valve
piping structure
piping
adapter
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JP6194446B2 (en
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Susumu Horie
進 堀江
Yoshihiro Ito
伊藤  嘉浩
Hideyuki Matsumura
秀幸 松村
Yasushi Kimura
裕史 木村
Tomohisa Sasagawa
知久 笹川
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Maruichi Corp
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Maruichi Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a method for hermetically connecting a connection part between a check valve and other piping member in a piping structure provided with the check valve.SOLUTION: In a piping structure provided with a check valve, the check valve 1 which is arranged in a tube body T forming the piping structure and is constituted from a material having elasticity is provided such that a main body part 1a, an opening part 1b, a closure part 1c and the check valve 1 having elasticity are integrated, and a check valve hermetically closing pard 1d having planes P opposite to each other which are continuously disposed along a periphery on the check valve 1, an attachment part 3a having a rib part of a piping member provided on the piping structure between the planes P opposite to each other is hermetically abutted and sandwiched and, thereby, channels other than the closure part 1c from the opening part 1b of the check valve 1 are hermetically divided into an upstream side and a downstream side of the check valve 1 is provided.

Description

本発明は、逆流防止弁を備えた配管構造に関し、更に詳しくは、逆流防止弁を備えた配管構造において、逆流防止弁を配管構造内部に配置する際の密閉構造に関するものである。   The present invention relates to a piping structure provided with a backflow prevention valve, and more particularly to a sealing structure when a backflow prevention valve is arranged inside the piping structure in a piping structure provided with a backflow prevention valve.

従来より、管体等の配管部材を利用した配管構造において、配管構造内部を通過する流体の逆流を防止するために、配管構造の内部に逆流防止弁を採用した配管構造が知られている。その一例として、特許文献1に記載の逆流防止弁を備えた配管構造について説明する。
配管構造の内部を流れる流体としては、気体、液体など様々な流体が考えられるが、この特許文献1に記載された、従来の逆流防止弁を備えた配管構造は、液体の特に浴槽・浴室・洗面台・流し台など使用により排水を生じる機器(以下「排水機器」)からの排水を処理する配管構造(排水配管)に関するものである。
2. Description of the Related Art Conventionally, in a pipe structure using a pipe member such as a pipe body, in order to prevent a backflow of fluid passing through the inside of the pipe structure, a pipe structure employing a backflow prevention valve inside the pipe structure is known. As an example, a piping structure provided with the backflow prevention valve described in Patent Document 1 will be described.
Various fluids such as gas and liquid can be considered as the fluid flowing inside the piping structure. However, the piping structure provided with the conventional backflow prevention valve described in Patent Document 1 is particularly suitable for a bath, a bathroom, The present invention relates to a piping structure (drainage piping) for treating drainage from equipment that generates drainage by using a sink, sink, etc. (hereinafter “drainage equipment”).

図12に示した、従来の逆流防止弁を備えた配管構造は、浴槽・浴室等の排水機器の排水を処理する配管構造であって、以下に記載する、浴槽と、洗い場パンと、配管部材と、逆流防止弁と、から構成される。
浴槽は、上方が開口した槽体であって、底面に、内部に溜めた浴湯を排出するための浴槽排水口を備えてなる。
洗い場パンは、浴室の使用者が身体を洗うなどする、浴槽に隣接して備えられた防水パンであって、底面に洗い場パン上の排水を排出するための洗い場パン排水口を備えてなる。
配管部材は、以下に記載する管体、逆流防止弁等より構成される。
管体は、浴槽や洗い場パンより生じた排水を、下水側の配管に接続するための円筒状の部材であって、直線状の直管や、角度を持って屈曲したエルボ管、T字形状に分岐したT字管等の種類がある。これらは硬質樹脂、または金属材などから構成され、ナット部材や、接着剤などを利用して接続される。
逆流防止弁は、配管構造の内部に配置固定される、シリコンゴムなど弾性を有する素材から構成される部材であって、略筒形状にして本体部と、本体部の上流側の端部に備えた開口部と、本体部の下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部と、を備えてなる。
この逆流防止弁は、上記のように構成したことで、上流側の端部である開口部から排水が流入すると、その重量/水圧により、下流側の閉塞部が弾性変形し、開口して内部の排水を排出する。排水の排出が完了し、内部の排水の量が減少すると、開口した閉塞部が弾性により元の閉塞状態に変形し、閉塞部が閉塞する。
下流側から屋内側に臭気や排水、害虫類などが逆流しようとした場合、配管の途中に配置されたこの逆流防止弁の閉塞部が閉塞していることにより、通過することができないため、この逆流防止弁よりも上流側に逆流することができない。また通気や排水の逆流が生じた場合でも、外周方向から圧力が加えられた場合では、閉塞部の対向する面同士がより強く当接するため、閉塞を維持し、下流側から上流側への通過、即ち逆流を防止する。
このように、排水を行う配管構造の内部に配置され、下流側から屋内側への臭気や害虫類の逆流を防止する部材を、排水トラップと呼ぶ。尚、排水トラップは臭気や害虫類の逆流を防止する機能が必須である一方で、排水の逆流に対しては防止する機能が必須では無いが、この従来例の排水トラップである逆流防止弁は、排水などに対しても逆流を防止する機能を有している。
The piping structure provided with the conventional backflow prevention valve shown in FIG. 12 is a piping structure for treating the drainage of drainage equipment such as a bathtub / bathroom, and is described below. And a backflow prevention valve.
The bathtub is a tank body that is open at the top, and includes a bathtub drainage port for discharging the bath water accumulated inside on the bottom surface.
The wash basin is a waterproof pan provided adjacent to the bathtub where the user of the bathroom is washing the body, and has a wash basin drain for discharging drainage on the wash basin on the bottom surface.
A piping member is comprised from the tubular body, the backflow prevention valve, etc. which are described below.
The pipe body is a cylindrical member for connecting drainage generated from a bathtub or washroom pan to the sewage side piping, straight straight pipe, elbow pipe bent at an angle, T-shape There are types of T-tubes that branch off. These are composed of a hard resin, a metal material, or the like, and are connected using a nut member or an adhesive.
The backflow prevention valve is a member made of an elastic material such as silicon rubber, which is arranged and fixed inside the piping structure, and has a substantially cylindrical shape and is provided at the main body portion and the upstream end portion of the main body portion. And an occluded portion provided at an end portion on the downstream side of the main body portion and closed by contacting with an inclined surface so that opposing surfaces gradually approach each other.
Since the backflow prevention valve is configured as described above, when drainage flows from the opening, which is the upstream end, the weight / water pressure causes the downstream blocking portion to elastically deform and open to the inside. Drain the waste water. When the drainage is completed and the amount of the internal drainage is reduced, the opened closed portion is deformed into the original closed state by elasticity, and the closed portion is closed.
When odor, drainage, pests, etc. try to flow backward from the downstream side to the indoor side, this block cannot be passed because the closed part of the backflow prevention valve placed in the middle of the piping is blocked. Back flow cannot be performed upstream of the back flow prevention valve. In addition, even when a backflow of aeration or drainage occurs, when pressure is applied from the outer peripheral direction, the opposing surfaces of the closed portion come into closer contact with each other, so the closed state is maintained and the passage from the downstream side to the upstream side is maintained. That is, backflow is prevented.
In this way, a member that is disposed inside the piping structure that drains water and prevents backflow of odors and pests from the downstream side to the indoor side is called a drain trap. In addition, while the function to prevent the backflow of odors and pests is indispensable for the drain trap, the function to prevent the backflow of drainage is not indispensable. It also has a function to prevent backflow against drainage and the like.

上記の各部材から構成される浴槽・浴室の逆流防止弁を備えた配管構造は、以下のようにして施工され、排水を下水側に排出する。
浴槽、浴室の各排水口から、下水側の配管迄を、管体によって配管接続する。この管体の配管接続においては、浴槽と浴室の各排水口からの配管を、途中部分でT字管を用いて合流させ、それより下流側の配管を、下水側の配管に接続させる。この時は排水が下流側(下水側)に流れるよう、若干の角度勾配を配管に備えて配管する。
更に浴槽又は洗い場パンの各排水口からT字管までの間に、逆流防止弁をそれぞれ配置して、浴槽・浴室の配管構造の施工が完了する。
上記のように構成した浴槽・浴室の排水配管において、浴槽又は洗い場パンの排水口から排水が排出されると、排水は、排水口から管体と、その内部に配置された逆流防止弁を通過し、T字管体を通過して、下水側に排出される。
また、下水側から臭気や害虫類が逆流してきた場合でも、それぞれの排水口に至る管体上に備えられた逆流防止弁によって、それらが逆流防止弁よりも上流側に逆流することはない。また、浴槽排水口または洗い場排水口の一方の排水口に、T字管を介して他方の排水口からの排水が逆流してきた場合、または下水側から両方の排水口に排水が逆流してきた場合でも、逆流防止弁によって、逆流防止弁よりも上流側に排水が逆流することを防止することができる。
The piping structure provided with the backflow prevention valve for the bathtub / bathroom constituted by each of the above members is constructed as follows and discharges the wastewater to the sewage side.
The pipes are connected by pipes from the drains of the bathtub and bathroom to the piping on the sewage side. In the pipe connection of this tubular body, the pipes from the respective drain outlets of the bathtub and the bathroom are joined using a T-shaped pipe in the middle, and the downstream pipe is connected to the sewage pipe. At this time, the piping is provided with a slight angle gradient so that the drainage flows downstream (sewage side).
Furthermore, a backflow prevention valve is disposed between each drainage port of the bathtub or the washing pan and the T-shaped pipe to complete the construction of the bathtub / bathroom piping structure.
In the bathtub / bathroom drain pipe configured as described above, when drainage is discharged from the drain outlet of the bathtub or wash basin pan, the drainage passes through the pipe body from the drain outlet and the backflow prevention valve disposed in the pipe body. Then, it passes through the T-shaped tube and is discharged to the sewage side.
Even if odors and pests flow backward from the sewage side, they do not flow upstream from the backflow prevention valves by the backflow prevention valves provided on the pipes reaching the respective drain ports. In addition, when drainage from the other drainage port flows back to one drainage port of the bathtub drainage port or washroom drainage port via the T-shaped pipe, or when drainage flows back to both drainage ports from the sewage side However, the backflow prevention valve can prevent the wastewater from flowing back upstream from the backflow prevention valve.

特開2008−169575号JP 2008-169575 A

上記のような特許文献1に記載の逆流防止弁を備えた配管構造の場合、以下に記載するような問題点があった。
逆流防止弁を備えた配管構造において、管体内に配置された逆流防止弁の上流側と下流側は、配管構造内を流体が上流から下流側へ適切に通過している状態以外の時は、逆流防止弁の密閉により区画される必要がある。
ここで、この密閉により区画される、という構成を達成するためには、逆流防止弁の閉塞部が(流体の上流側から下流側への流れがないことにより)閉塞されている状態において密閉が達成され、流体の下流側からの逆流があっても閉塞部を通過できない、とすると共に、逆流防止弁の外側面と管体(または配管構造)の内側面との間でも密閉が達成されている必要がある。なぜならば、逆流防止弁の外側面と管体(または配管構造)の内側面との間で流体が通過可能であれば、閉塞部の開閉に関係なく、逆流防止弁の上流側と下流側の間で流体の通過が可能となり、下流側から上流側への逆流も可能となる為である。
尚、ここで言う「密閉」とは、「配管構造内を流れる流体が、密閉部分をほぼ通過できない」、という意味である。
例えば配管構造が従来例のように排水の処理を行う配管構造であれば、「密閉」とは「勾配によって自然に流れる排水の水圧に対して、水漏れが生じない水密的な接続」を意味する。これに対し、配管構造を流れる流体が気体であれば、「密閉」とは「配管内を通過する気体が漏れない気密的な接続」を意味するものである。
また、配管構造を流れる流体が、従来例と同じ液体の水の場合であっても、勾配を利用した自然排水を行う従来例の配管構造に対して、常時加圧されている給水配管の場合、「密閉」とは「加圧された給水の水圧に対して、水漏れが生じない水密的な接続」を意味するものである。
このように、配管構造の内部を流れる流体の種類や使用時の流体の圧力等によって、「密閉」に求められる具体的な接続箇所の接続の強度は異なるものであり、「排水用」「給水用」「通気用」等、それぞれの配管の目的、接続される機器に合わせて、配管の内部を流れる流体と通過時の圧力等に対し、「配管を流れる流体が、当該部分をほぼ通過できない」という要件を満たすので有れば、接続箇所の接続の強度に関係なく、当該部分は「密閉」という要件を満たすものである。
上記従来例の場合、具体的に逆流防止弁の外側面と管体の内側面との間で、どの様な方法で密閉を達成しているのかは記載が無く、図面からは接着的な方法等を使用している事が推測される。しかしながら、接着法を用いるためには、逆流防止弁を成す素材を接着可能な素材、つまり「接着剤という薬品に対して溶解等の劣化を生じやすい素材」とする必要があり、逆流防止弁を始め、各部材を劣化しにくい素材にて構成したい、という普遍的な要望を満たさないものとなってしまう。
特に、従来例の場合、配管構造は排水機器の排水を処理する排水配管であるため、その内部を流れる排水には有機溶媒など接着剤の成分に類似するものが通過する場合もある。このため、耐薬性の高い素材を用い、接着以外での方法にて逆流防止弁と、配管部材との接続を行うことが望まれている。
本発明は上記問題点に鑑み発明されたものであって、逆流防止弁を備えた配管構造において、密閉的に接続する必要がある、逆流防止弁と他の配管部材との接続部分の構造に関するものである。
In the case of the piping structure provided with the backflow prevention valve described in Patent Document 1 as described above, there are problems as described below.
In the piping structure provided with the backflow prevention valve, the upstream side and the downstream side of the backflow prevention valve arranged in the pipe body are in a state other than the state where the fluid is appropriately passing through the piping structure from the upstream side to the downstream side. It must be partitioned by sealing the backflow prevention valve.
Here, in order to achieve the configuration of being partitioned by the sealing, the sealing is performed in a state where the blocking portion of the backflow prevention valve is blocked (because there is no flow from the upstream side to the downstream side of the fluid). Is achieved, and even if there is a backflow from the downstream side of the fluid, it cannot pass through the blocking portion, and at the same time, sealing is achieved between the outer surface of the backflow prevention valve and the inner surface of the pipe body (or piping structure). Need to be. This is because if the fluid can pass between the outer side surface of the backflow prevention valve and the inner side surface of the pipe body (or the piping structure), the upstream side and the downstream side of the backflow prevention valve can be used regardless of whether the closed portion is opened or closed. This is because the fluid can pass between them, and the reverse flow from the downstream side to the upstream side is also possible.
The term “sealed” as used herein means that “fluid flowing in the piping structure cannot substantially pass through the sealed portion”.
For example, if the piping structure is a piping structure that treats wastewater as in the conventional example, `` sealing '' means `` watertight connection that does not cause water leakage against the water pressure of the wastewater that naturally flows due to the gradient '' To do. On the other hand, if the fluid flowing through the piping structure is a gas, “sealing” means “an airtight connection in which the gas passing through the piping does not leak”.
Also, even when the fluid flowing in the piping structure is the same liquid water as in the conventional example, the water supply piping is always pressurized against the conventional piping structure that performs natural drainage using a gradient. The “sealing” means “watertight connection that does not cause water leakage with respect to the pressure of the pressurized water supply”.
As described above, the strength of connection at specific connection points required for “sealing” varies depending on the type of fluid flowing inside the piping structure and the pressure of the fluid during use. Depending on the purpose of each pipe, such as “for ventilation” and the equipment to be connected, the fluid flowing in the pipe and the pressure at the time of passage, etc. If this requirement is satisfied, the portion satisfies the requirement of “sealing” regardless of the strength of connection at the connection location.
In the case of the above conventional example, there is no description as to how the sealing is achieved between the outer surface of the backflow prevention valve and the inner surface of the pipe body, and it is an adhesive method from the drawings. Etc. are presumed to be used. However, in order to use the bonding method, it is necessary to make the material that forms the backflow prevention valve a material that can be bonded, that is, “a material that is susceptible to deterioration such as dissolution with respect to a chemical called an adhesive”. In the beginning, each member will not satisfy the universal desire to be made of a material that does not easily deteriorate.
In particular, in the case of the conventional example, the piping structure is a drainage pipe for treating the drainage of the drainage equipment, and therefore, there may be a case where something similar to an adhesive component such as an organic solvent passes through the drainage flowing through the inside. For this reason, it is desired to use a material having high chemical resistance and to connect the backflow prevention valve and the piping member by a method other than bonding.
This invention is invented in view of the said problem, Comprising: In the piping structure provided with the backflow prevention valve, it is necessary to seal-connect, It is related with the structure of the connection part of a backflow prevention valve and another piping member. Is.

請求項1に記載の本発明は、
配管内に配置されて配管内の逆流を防止する逆流防止弁を備えた配管構造であって、
配管構造を成す管体Tの内部に配置される、弾性を有する素材から構成される逆流防止弁1を、略筒形状の本体部1aと、本体部1aの上流側の端部に備えた開口部1bと、本体部1aの下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部1cと、弾性を有する逆流防止弁1と一体に設けられ、逆流防止弁1の周縁に、周縁に沿って連続して設けられる、対向する面Pを備えてなり、該対向する面P同士の間に、配管構造に備えられる配管部材のリブ部分を有する取付部3aを密閉的に当接させ挟持することで、逆流防止弁1の開口部1bから閉塞部1c以外の流路を、逆流防止弁1の上流側と下流側とに密閉的に区画する逆流防止弁密閉部1dと、から構成してなることを特徴とする、逆流防止弁を備えた配管構造である。
The present invention described in claim 1
A piping structure provided with a backflow prevention valve arranged in the piping to prevent backflow in the piping,
Opening provided with a substantially cylindrical main body 1a and an upstream end of the main body 1a, with a backflow prevention valve 1 made of an elastic material, which is arranged inside the tube T forming the piping structure. A portion 1b, a closed portion 1c provided at an end portion on the downstream side of the main body portion 1a, and closed by contact with each other so as to face each other gradually, and a backflow prevention valve 1 having elasticity Are provided on the peripheral edge of the backflow prevention valve 1 and are provided continuously along the peripheral edge, and a piping member provided in the piping structure between the opposing faces P. The attachment portion 3a having the rib portion is hermetically abutted and sandwiched so that the flow path other than the closing portion 1c from the opening portion 1b of the backflow prevention valve 1 to the upstream side and the downstream side of the backflow prevention valve 1 A backflow prevention valve sealing portion 1d that hermetically partitions, and To a piping structure having a check valve.

請求項2に記載の本発明は、
配管内に配置されて配管内の逆流を防止する逆流防止弁を備えた配管構造であって、配管構造を成す管体Tの内部に配置される、弾性を有する素材から構成される逆流防止弁1を、略筒形状の本体部1aと、本体部1aの上流側の端部に備えた開口部1bと、本体部1aの下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部1cと、弾性を有する逆流防止弁1と一体に設けられるリブ部分であって、逆流防止弁1の周縁に、周縁に沿って連続して設けられ、配管構造に備えられる配管部材の対向する面Pを有する取付部3aに挟持されて、逆流防止弁1と管体Tの内部との間を密閉的に当接させることで、逆流防止弁1の開口部1bから閉塞部1c以外の流路を、逆流防止弁1の上流側と下流側とに密閉的に区画する逆流防止弁密閉部1dと、から構成してなることを特徴とする、逆流防止弁を備えた配管構造である。
The present invention described in claim 2
A pipe structure provided with a backflow prevention valve arranged in a pipe to prevent a backflow in the pipe, and the backflow prevention valve made of an elastic material arranged inside a pipe body T constituting the pipe structure 1 are provided in the substantially cylindrical main body 1a, the opening 1b provided at the upstream end of the main body 1a, and the opposing surfaces provided at the downstream end of the main body 1a gradually approach each other. And a rib portion provided integrally with the backflow prevention valve 1 having elasticity, and is continuous with the peripheral edge of the backflow prevention valve 1 along the peripheral edge. Is provided between the backflow prevention valve 1 and the inside of the tube T so that the backflow is tightly held between the mounting portions 3a having the facing surfaces P of the piping members provided in the piping structure. A flow path other than the blocking portion 1c from the opening 1b of the prevention valve 1 is connected to the backflow prevention valve 1. A check valve sealing portion 1d that partitions sealingly on the flow side and the downstream side, and characterized by being constituted by a pipe structure with a check valve.

請求項3に記載の本発明は、
上記逆流防止弁を備えた配管構造において、配管構造を成す管体Tの内部にアダプター部材3を備え、該アダプター部材3は、管体Tの内側面に密閉的に当接するアダプター密閉部2と、アダプター部材3内部に設けられ、アダプター密閉部2によって区画された上流側と下流側とを連通する、流体が通過する流路部3bと、流路部3bの下流側に設けられた、逆流防止弁1の密閉部に当接して逆流防止弁1を取り付ける取付部3aと、から構成されることを特徴とする、段落0007又は段落0008に記載の逆流防止弁を備えた配管構造である。
The present invention according to claim 3 provides:
In the piping structure provided with the backflow prevention valve, the adapter member 3 is provided inside the tubular body T forming the piping structure, and the adapter member 3 includes an adapter sealing portion 2 that abuts against the inner side surface of the tubular body T, and The flow path part 3b that is provided in the adapter member 3 and communicates the upstream side and the downstream side defined by the adapter sealing part 2 and through which the fluid passes, and the reverse flow provided on the downstream side of the flow path part 3b. A piping structure provided with the backflow prevention valve according to paragraph 0007 or paragraph 0008, characterized in that the backflow prevention valve is configured to include a mounting portion 3 a that attaches the backflow prevention valve 1 in contact with the sealing portion of the prevention valve 1.

請求項4に記載の本発明は、
上記逆流防止弁を備えた配管構造において、アダプター密閉部2を、弾性を有する逆流防止弁1と一体に構成することを特徴とする、段落0009に記載の逆流防止弁を備えた配管構造である。
The present invention according to claim 4 provides:
The piping structure provided with the backflow prevention valve according to paragraph 0009, wherein the adapter sealing portion 2 is configured integrally with the elastic backflow prevention valve 1 in the piping structure provided with the backflow prevention valve. .

請求項5に記載の本発明は、
上記逆流防止弁を備えた配管構造において、逆流防止弁1の逆流防止弁密閉部1d、または取付部3aの一方の形状を、断面視略コの字形状とすると共に、他方の形状を、コの字の開口部1b分に密閉的に嵌合するフランジ部と、から構成することを特徴とする、段落0009又は段落0010に記載の逆流防止弁を備えた配管構造である。
The present invention according to claim 5 provides:
In the piping structure provided with the backflow prevention valve, the backflow prevention valve sealing portion 1d of the backflow prevention valve 1 or one of the mounting portions 3a has a substantially U shape in cross section, and the other shape is It is a piping structure provided with the backflow prevention valve according to paragraph 0009 or paragraph 0010, characterized in that it is composed of a flange portion that fits hermetically in the opening portion 1b of the character.

請求項6に記載の本発明は、
上記逆流防止弁を備えた配管構造において、逆流防止弁密閉部1dの断面視略コの字形状の外周部分に、コの字の外周部分に周縁に沿って連続して設けた凸条を備え、該凸条を管体Tの内側面に密閉的に当接させることで、アダプター密閉部2とすることを特徴とする、段落0011に記載の逆流防止弁を備えた配管構造である。
The present invention according to claim 6 provides:
In the piping structure provided with the backflow prevention valve, the backflow prevention valve sealing portion 1d has a substantially U-shaped outer peripheral portion in a cross-sectional view, and a protrusion provided continuously along the periphery of the U-shaped outer peripheral portion. The piping structure provided with the backflow prevention valve according to paragraph 0011, characterized in that an adapter sealing portion 2 is formed by sealingly contacting the ridge with the inner side surface of the tubular body T.

請求項7に記載の本発明は、
上記逆流防止弁を備えた配管構造において、配管構造を成す管体Tの側面に、逆流防止弁1を取り出す取出口6aを設けたことを特徴とする、段落0007乃至段落0011のいずれか一つに記載の逆流防止弁を備えた配管構造である。
The present invention according to claim 7 provides:
Any one of paragraphs 0007 to 0011, wherein in the piping structure provided with the backflow prevention valve, an outlet 6a for taking out the backflow prevention valve 1 is provided on a side surface of the pipe body T constituting the piping structure. It is the piping structure provided with the backflow prevention valve described in 1.

請求項8に記載の本発明は、
上記逆流防止弁を備えた配管構造において、管体Tの側面に、逆流防止弁1を取り出す取出口6aを設けると共に、アダプター部材3によって該取出口6aを閉塞するように構成したことを特徴とする、段落0009乃至段落0012のいずれか一つに記載の逆流防止弁を備えた配管構造である。
尚、請求項7、請求項8で言う「取出口」とは、機器の使用の際に開口して流体が流入する開口ではなく、通常の使用時には閉塞され、メンテナンスなど配管構造の内部に作業を行う必要がある場合のみ開口される開口部分を指し示す表現である。
The present invention according to claim 8 provides:
The pipe structure provided with the backflow prevention valve is characterized in that an outlet 6a for taking out the backflow prevention valve 1 is provided on the side surface of the tube body T, and the outlet 6a is closed by the adapter member 3. A piping structure comprising the backflow prevention valve according to any one of paragraphs 0009 to 0012.
In addition, the “outlet” referred to in claims 7 and 8 is not an opening through which fluid flows in when the device is used, but is closed during normal use, and the inside of the piping structure such as maintenance work. It is the expression which points to the opening part opened only when it is necessary to perform.

請求項1、請求項2に記載の本発明では、弾性を有する逆流防止弁の本体部の周縁に、弾性を有する本体部と一体に構成された逆流防止弁部密閉部を構成し、
この逆流防止弁密閉部を、配管構造に用いられる配管部材に対して、請求項1のように対向する面の間で挟持するようにすることで、または請求項2のように対向する面の間に挟持されるようにすることで、接着剤などの薬剤を利用する必要なく、嵌合的方法により、逆流防止弁と他の配管部材とを接続するようにした。
この時、逆流防止弁密閉部は、本体部の弾性をそのままパッキングとして利用することができ、これにより、逆防防止弁の開口部から閉塞部へ至る流路以外の流路を、逆流防止弁の上流側と下流側とに密閉的に区画するように構成した。本体部の弾性をそのままパッキングとして利用し、これを挟持・嵌合する構成としたことで、接着などが不要となり、耐薬性の高い素材を利用できるなど素材選択の幅が広がると共に、接着や固定用の専用部材を用意した場合などに比べ、安価且つ施工が容易な構造とすることができる。
請求項3に記載した本発明では、弾性を備えた逆流防止弁との密閉的な接続を、樹脂などの硬質素材からなるアダプター部材が行い、このアダプター部材が同じく硬質な管体と接続するように構成した。このようにアダプター部材を利用することで、配管構造の内部に弾性を有する素材である逆流防止弁を配置するに当たり、配置の作業自体を、硬質素材である管体とアダプター部材との間で行うことができ、配置固定を管体に直接逆流防止弁を密閉的に取り付け固定するより容易且つ確実に行うことができる。
請求項4に記載の本発明では、アダプター密閉部を、逆流防止弁の弾性を利用して構成することができ、逆流防止弁密閉部とアダプター密閉部とをパッキング様の部材で構成する場合に、部材点数を減らすことができ、コストダウンと共に、部材を作成する際の手間を減らすことができる。
請求項5に記載の本発明では、逆流防止弁密閉部、または取付部の構成を明確にすることができる。
請求項6に記載の本発明では、アダプター密閉部の構成を明確にすることができる。
請求項7に記載の本発明では、逆流防止弁を配管構造内部から容易に取り出すことができる。
請求項8に記載の本発明では、アダプター部材を採用した配管構造において、逆流防止弁を配管構造内部から容易に取り出すことができると共に、このアダプター部材を利用して配管構造の開口となる取出口を閉塞することができる。
In the present invention according to claim 1 and claim 2, the backflow prevention valve portion sealing portion integrally formed with the elastic main body portion is formed on the periphery of the main portion of the elastic backflow prevention valve,
The backflow prevention valve sealing portion is sandwiched between the opposing surfaces as in claim 1 with respect to the piping member used in the piping structure, or the opposing surface as in claim 2. By being sandwiched between them, the backflow prevention valve and other piping members are connected by a fitting method without using a chemical such as an adhesive.
At this time, the backflow prevention valve sealing part can use the elasticity of the main body part as it is as a packing, so that the flow path other than the flow path from the opening part of the check valve to the closed part can be used as a backflow prevention valve. It was configured to be hermetically partitioned into an upstream side and a downstream side. By using the elasticity of the main body as it is as a packing and sandwiching and fitting it, there is no need for adhesion, etc., and materials with high chemical resistance can be used. Compared to the case where a dedicated member is prepared, the structure can be made inexpensive and easy to construct.
In the present invention described in claim 3, an adapter member made of a hard material such as a resin performs a hermetic connection with a backflow prevention valve having elasticity, and this adapter member is also connected to a hard tube body. Configured. By using the adapter member in this way, the placement operation itself is performed between the tubular body, which is a hard material, and the adapter member when the backflow prevention valve, which is an elastic material, is placed inside the piping structure. In addition, the arrangement can be fixed more easily and reliably than when the backflow prevention valve is hermetically attached and fixed directly to the tube.
In the present invention described in claim 4, when the adapter sealing portion can be configured using the elasticity of the backflow prevention valve, and the backflow prevention valve sealing portion and the adapter sealing portion are configured by a packing-like member. The number of members can be reduced, the cost can be reduced, and the labor for creating the members can be reduced.
In this invention of Claim 5, the structure of a backflow prevention valve sealing part or an attachment part can be clarified.
In this invention of Claim 6, the structure of an adapter sealing part can be clarified.
In this invention of Claim 7, a backflow prevention valve can be easily taken out from the inside of a piping structure.
In this invention of Claim 8, in the piping structure which employ | adopted the adapter member, while being able to take out a backflow prevention valve easily from the inside of a piping structure, the outlet which becomes an opening of a piping structure using this adapter member Can be occluded.

第一実施例の施工状態を示す、一部を切り欠きした側面図である。It is the side view which notched a part which shows the construction state of a 1st Example. 第一実施例の要部を示す断面図である。It is sectional drawing which shows the principal part of a 1st Example. 第一実施例の要部の部材構成を示す断面図である。It is sectional drawing which shows the member structure of the principal part of a 1st Example. 第二実施例の施工状態を示す、一部を切り欠きした側面図である。It is the side view which notched a part which shows the construction state of a 2nd Example. 第二実施例の要部を示す断面図である。It is sectional drawing which shows the principal part of 2nd Example. 第二実施例の要部の部材構成を示す断面図である。It is sectional drawing which shows the member structure of the principal part of 2nd Example. 第三実施例の施工状態を示す、一部を切り欠きした側面図である。It is the side view which notched a part which shows the construction state of a 3rd Example. 第三実施例の要部を示す断面図である。It is sectional drawing which shows the principal part of 3rd Example. 第三実施例の要部の部材構成を示す断面図である。It is sectional drawing which shows the member structure of the principal part of 3rd Example. 他の実施例の、取出口付き継手管近傍の断面図である。It is sectional drawing of the coupling pipe vicinity with a taking-out port of another Example. 他の実施例の、取出口付き継手管近傍の断面図である。It is sectional drawing of the coupling pipe vicinity with a taking-out port of another Example. 従来の、逆流防止弁を備えた配管構造を示す断面図である。It is sectional drawing which shows the conventional piping structure provided with the backflow prevention valve.

以下に、本発明の第一実施例について、図面を参照しつつ説明する。
図1乃至図3に示した、本発明の第一実施例の逆流防止弁を備えた配管構造は、以下に記載する、洗面台Sと、管体Tや逆流防止弁1等からなる配管部材と、その他の部材より構成されてなる。
洗面台Sは、床面上に設置され、内部に配管部材を配置するキャビネット部Cと、該キャビネット部Cの上方に配置される、上方が開口した槽体であって、底面に、内部に溜めた排水を排出するための洗面排水口S1を備えた洗面ボウルSBと、から構成されてなる。
配管部材は、洗面ボウルSB内に生じた排水を、下水側の配管に接続するための部材であって、以下に記載する管体T、アダプター部材3、逆流防止弁1、等より構成される。
管体Tは、洗面台Sの洗面ボウルSBより生じた排水を、下水側の配管に接続するための円筒状の部材であって、直線状の直管や、角度を持って屈曲したエルボ管、また下記に詳述する取出口付き継手管6等の種類がある。これらは硬質樹脂、または金属材などから構成され、ナット部材や、接着剤などを利用して接続される。
取出口付き継手管6は、管体Tの一種であって、略円筒形状であって、上方に取出口6aを、上方側面と下端とに他の配管部材(管体T)との接続用の管体部分8を、それぞれ備えてなる。尚取出口6aの内側面には、後述するアダプター部材3の回転ロック式嵌合部4と嵌合する突起部9を備えてなる。
アダプター部材3は、略円筒形状の配管部材であって、円筒形状の部材の側面から下端に向かって、アダプター部材3内部に流体(本実施例の場合排水)が通過する流路部3bを備えてなる。流路部3bの位置は、アダプター部材3を取出口付き継手管6の内部に配置した時、図1乃至図2のように、取出口付き継手管6の側面の管体部分8に、流路部3bの上流の端部が合致するように構成されてなる(後述する回転ロックが適正に行われた場合に、取出口付き継手管6の側面の管体部分8に、流路部3bの上流の端部が合致するように構成されてなる)。また、円筒形状の上端側の端部には、取出口付き継手管6の取出口6aを閉塞する、取っ手(図示せず)を備えた蓋部5を構成してなる。
また、下端側の端部であって、流路部3bの下流側端部の外周部分に、後述する逆流防止弁密閉部1dに密閉的に当接し、嵌合する、側面方向に向かって凸となるリブ部分を周縁に沿って備えた取付部3aを備えてなる。
尚、アダプター部材3は、蓋部5の下方にて、回転ロック式嵌合部4を備えてなり、アダプター部材3を取出口付き継手管6内に配置した後、アダプター部材3をある程度回転させることで、回転ロック式嵌合部4と突起部9を嵌合させ、アダプター部材3を取出口付き継手管6内に固定することができる。
逆流防止弁1は、配管構造の内部に配置固定される、シリコンゴムなど弾性を有する素材から構成される部材であって、略筒形状にして本体部1aと、本体部1aの上流側の端部に備えた開口部1bと、本体部1aの下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部1cと、を備えてなる。
この逆流防止弁1は、上記のように構成したことで、上流側の端部である開口部1bから排水が流入すると、その重量/水圧により、下流側の閉塞部1cが弾性変形し、開口して内部の排水を排出する。排水の排出が完了し、内部の排水の量が減少すると、開口した閉塞部1cが弾性により元の閉塞状態に変形し、閉塞部1cが閉塞する。
下流側から屋内側に臭気や排水、害虫類などが逆流しようとした場合、配管の途中に配置されたこの逆流防止弁1の閉塞部1cが閉塞していることにより、通過することができないため、この逆流防止弁1よりも上流側に逆流することができない。また通気や排水の逆流が生じた場合でも、外周方向から圧力が加えられた場合では、閉塞部1cの対向する面同士がより強く当接するため、閉塞を維持し、下流側から上流側への通過、即ち逆流を防止する。
このように、排水を行う配管構造の内部に配置され、下流側から屋内側への臭気や害虫類の逆流を防止する部材を、排水トラップと呼ぶ。尚、排水トラップは臭気や害虫類の逆流を防止する機能が必須である一方で、排水の逆流に対しては防止する機能が必須では無いが、この第一実施例の排水トラップである逆流防止弁1は、排水などに対しても逆流を防止する機能を有している。
更に本第一実施例の逆流防止弁1には、弾性を有する本体部1aと一体に構成される逆流防止弁密閉部1dが備えられてなる。
該逆流防止弁密閉部1dについて詳述すると、本体部1aの周縁に、周縁に沿って連続して設けられる、断面略コの字形状の部分であって、コの字の開口が内側方向を向いて形成されてなる。このようにコの字形状としたことで、コの字の上側の面と下側の面、即ち対向する面Pが形成されてなる。
また、逆流防止弁密閉部1dの断面視略コの字形状の外周部分に、コの字の外周部分に周縁に沿って連続して設けた凸条からなるアダプター密閉部2を設けてなる。該アダプター密閉部2は、アダプター部材3に取り付けられた逆流防止弁1を、取出口付き継手管6内に配置したとき、アダプター密閉部2の凸条の外側面が、取出口付き継手管6の、内側面であって、上流の管体部分8と下流側の管体部分8の間に配置され、アダプター部材3と、管体である取出口付き継手管6の内部との間で密閉を生じるように構成されてなる。
また、アダプター部材3の蓋部5の周縁に、断面円形の弾性素材をリング状に構成した、Oリング部材Oを備えてなる。このOリング部材Oは、上述した逆流防止弁1の素材に比べ、比較的表面が滑らかで滑り性のよい素材にて構成されてなる。
また、上記洗面台Sが設置される床面の床下空間には、下水側に繋がる、床下配管が備えられてなる。
Below, the 1st example of the present invention is described, referring to drawings.
The piping structure provided with the backflow prevention valve of the first embodiment of the present invention shown in FIGS. 1 to 3 is a piping member composed of a wash basin S, a tube T, a backflow prevention valve 1 and the like described below. And other members.
The wash basin S is a cabinet part C that is installed on the floor surface and in which piping members are disposed, and a tank body that is disposed above the cabinet part C and that is open at the top. And a wash bowl SB provided with a wash water drain S1 for discharging the accumulated waste water.
The piping member is a member for connecting the drainage generated in the wash bowl SB to the piping on the sewage side, and is composed of the tube T, the adapter member 3, the backflow prevention valve 1, and the like described below. .
The tubular body T is a cylindrical member for connecting the waste water generated from the wash bowl SB of the wash basin S to the sewage side pipe, and is a straight straight pipe or an elbow pipe bent at an angle. Also, there are types of joint pipes 6 with outlets, which will be described in detail below. These are composed of a hard resin, a metal material, or the like, and are connected using a nut member or an adhesive.
The joint pipe 6 with an outlet is a kind of a tubular body T, and has a substantially cylindrical shape. The outlet 6a is connected to the upper side, and another piping member (the pipe T) is connected to the upper side surface and the lower end. The tube portions 8 are respectively provided. In addition, the inner surface of the take-out port 6a is provided with a protruding portion 9 that is fitted to a rotation lock type fitting portion 4 of the adapter member 3 to be described later.
The adapter member 3 is a substantially cylindrical pipe member, and includes a flow path portion 3b through which fluid (drainage in this embodiment) passes inside the adapter member 3 from the side surface to the lower end of the cylindrical member. It becomes. When the adapter member 3 is disposed inside the joint pipe 6 with an outlet, the flow path portion 3b is positioned on the tube portion 8 on the side surface of the joint pipe 6 with an outlet as shown in FIGS. The upstream end portion of the passage portion 3b is configured to match (when the rotation lock described later is properly performed, the flow passage portion 3b is connected to the tube portion 8 on the side surface of the joint pipe 6 with outlet. Is configured so that the upstream end of the mate coincides). In addition, the end portion on the upper end side of the cylindrical shape is configured with a lid portion 5 having a handle (not shown) that closes the outlet 6a of the joint pipe 6 with outlet.
Moreover, it is an end part on the lower end side, and is in contact with and fitted to a backflow prevention valve sealing part 1d, which will be described later, on the outer peripheral part of the downstream end part of the flow path part 3b. And a mounting portion 3a provided with a rib portion along the periphery.
The adapter member 3 is provided with a rotation lock type fitting portion 4 below the lid portion 5, and after the adapter member 3 is disposed in the joint pipe 6 with an outlet, the adapter member 3 is rotated to some extent. Thereby, the rotation lock type fitting part 4 and the projection part 9 can be fitted, and the adapter member 3 can be fixed in the joint pipe 6 with an outlet.
The backflow prevention valve 1 is a member made of an elastic material such as silicon rubber, which is disposed and fixed inside the piping structure, and has a substantially cylindrical shape, and a main body portion 1a and an upstream end of the main body portion 1a. An opening portion 1b provided in the portion, and a closing portion 1c provided at the end portion on the downstream side of the main body portion 1a, which is closed by contacting with an inclined surface so that the opposing surfaces gradually approach each other. It becomes.
Since the backflow prevention valve 1 is configured as described above, when drainage flows from the opening 1b that is the upstream end, the downstream blocking portion 1c is elastically deformed by its weight / water pressure, and the opening And drain the internal drainage. When the drainage is completed and the amount of the internal drainage is reduced, the opened closing portion 1c is elastically deformed to the original closed state, and the closing portion 1c is closed.
When odor, drainage, pests, etc. try to flow backward from the downstream side to the indoor side, the closed portion 1c of the backflow prevention valve 1 arranged in the middle of the piping is blocked and cannot pass therethrough. Therefore, it is not possible to reversely flow upstream from the check valve 1. Further, even when a reverse flow of ventilation or drainage occurs, when pressure is applied from the outer peripheral direction, the opposing surfaces of the closed portion 1c come into contact with each other more strongly, so that the closed state is maintained and the downstream side to the upstream side is maintained. The passage, that is, the backflow is prevented.
In this way, a member that is disposed inside the piping structure that drains water and prevents backflow of odors and pests from the downstream side to the indoor side is called a drain trap. Although the drain trap has a function to prevent the backflow of odors and pests, the drain trap does not necessarily have a function to prevent the backflow of drainage, but the backflow prevention that is the drain trap of this first embodiment. The valve 1 has a function of preventing a backflow against drainage or the like.
Further, the backflow prevention valve 1 of the first embodiment is provided with a backflow prevention valve sealing portion 1d configured integrally with a main body portion 1a having elasticity.
The backflow prevention valve sealing part 1d will be described in detail. A substantially U-shaped cross section is provided on the periphery of the main body 1a continuously along the periphery. It is formed facing. By adopting the U shape in this way, the upper surface and the lower surface of the U shape, that is, the opposing surface P is formed.
Further, an adapter sealing portion 2 made of a ridge continuously provided along the peripheral edge of the U-shaped outer peripheral portion is provided on the outer peripheral portion of the substantially U-shaped cross-sectional view of the backflow prevention valve sealing portion 1d. The adapter sealing portion 2 is configured such that when the backflow prevention valve 1 attached to the adapter member 3 is disposed in the joint pipe 6 with an outlet, the outer surface of the protruding portion of the adapter sealing section 2 is connected to the joint pipe 6 with an outlet. , Which is disposed between the upstream pipe body portion 8 and the downstream pipe body portion 8 and is sealed between the adapter member 3 and the inside of the joint pipe 6 with an outlet, which is a pipe body. It is comprised so that it may produce.
In addition, an O-ring member O formed of an elastic material having a circular cross section in a ring shape is provided on the periphery of the lid portion 5 of the adapter member 3. The O-ring member O is made of a material having a relatively smooth surface and good slipperiness as compared with the material of the above-described check valve 1.
The underfloor space on the floor where the washstand S is installed is provided with underfloor piping connected to the sewage side.

上記した各部材から構成される、洗面台の逆流防止弁を備えた配管構造は、以下のようにして施工され、排水を下水側に排出する。
床面上に、洗面ボウルSB及びキャビネットからなる洗面台Sを設置する。次に、洗面ボウルSBの洗面排水口S1から、下水側の床下配管迄を、管体Tによって配管接続する。この管体Tの配管接続においては、図1に示したように、洗面ボウルSBの排水口に接続した管体Tに、エルボ管を接続して、一端キャビネット奥側側壁に向かって配管を屈曲させ、更に取出口付き継手管6を介して配管方向を下方に向けた後、直管を利用し床下配管に接続する。接続部分はパッキングを利用したナット締め固定、または接着剤を利用した接着固定で行い、各接続部分を漏水等が生じないように充分な密閉強度にて接続する。また配管接続に際しては、直線状の管体Tをカットすることで位置あわせを行う。
また、アダプター部材3に逆流防止弁1を接続する。この接続においては、逆流防止弁1の逆流防止弁密閉部1dを、アダプター部材3の取付部3aに嵌合させて取り付ける。具体的には、逆流防止弁密閉部1dの断面略コの字形状の部分において、コの字の開口から、コの字の内部に、アダプター部材3の取付部3aのリブ部分を収納するようにして嵌合させることで、アダプター部材3に逆流防止弁1を密閉的に嵌合させ、接続固定する。このように、逆流防止弁密閉部1dのコの字形状において、コの字の上側の面と下側の面、即ち対向する面Pに、アダプター部材3の取付部3aのリブ部分が上下から挟持されるようにして嵌合することで、アダプター部材3と逆流防止弁1の間が密閉的に接続される。
最後に、取出口付き継手管6の取出口6aから、逆流防止弁1を接続したアダプター部材3を挿入し、アダプター部材3を取出口付き継手管6に嵌合固定させる。
この時には、アダプター部材3は、蓋部5の側面に回転ロック式嵌合部4を備えてなり、アダプター部材3を取出口付き継手管6内に配置した後、アダプター部材3をある程度回転させることで、アダプター部材3を取出口付き継手管6内に固定することができる。
この時、逆流防止弁密閉部1dの断面視略コの字形状の外周部分に設けたアダプター密閉部2が、取出口付き継手管6の内面に、周縁に沿って連続して当接し、上流の管体部分8と下流側の管体部分8の間に配置され、逆流防止弁1を介して、アダプター部材3と取出口付き継手管6の内部との間で密閉を生じる。これにより、逆流防止弁1の外部と管体Tの内部との間で密閉が達成され、逆流防止弁1の上流側と下流側の間で、逆流防止弁1の閉塞部1cが閉塞されている状態において、流体である排水の通過が生じないようにすることができる。
また、蓋部5により取出口6aが閉塞され密閉される。この蓋部5の側面には、Oリング部材Oが備えられており、このOリング部材Oを介して蓋部5外側面と取出口6aの内周縁が当接することで、取出口6aが水密的に閉塞され密閉される。尚、上述のように、このOリング部材Oは、逆流防止弁1の素材に比べ、比較的表面が滑らかで滑り性のよい素材にて構成されてなるため、アダプター部材3を回転ロックによって嵌合させる際に、摩擦の程度が低くなり作業性が良くなる。
The piping structure comprising the above-described members and provided with the backflow prevention valve for the wash basin is constructed as follows and discharges the waste water to the sewage side.
On the floor surface, a wash basin S composed of a wash bowl SB and a cabinet is installed. Next, the pipe T connects the wash water drain S1 of the wash bowl SB to the underfloor pipe on the sewage side. In the pipe connection of this tube T, as shown in FIG. 1, an elbow pipe is connected to the tube T connected to the drain of the wash bowl SB, and the pipe is bent toward the back side wall of the cabinet. Further, the pipe direction is directed downward through the joint pipe 6 with an outlet, and then connected to the underfloor pipe using a straight pipe. The connecting portions are fixed by nut tightening using packing or adhesive fixing using an adhesive, and each connecting portion is connected with a sufficient hermetic strength so that water leakage does not occur. Further, when piping is connected, alignment is performed by cutting the straight tubular body T.
Further, the backflow prevention valve 1 is connected to the adapter member 3. In this connection, the backflow prevention valve sealing portion 1 d of the backflow prevention valve 1 is fitted and attached to the attachment portion 3 a of the adapter member 3. Specifically, the rib portion of the attachment portion 3a of the adapter member 3 is accommodated in the U-shaped opening from the U-shaped opening in the substantially U-shaped section of the backflow prevention valve sealing portion 1d. Thus, the backflow prevention valve 1 is hermetically fitted to the adapter member 3 and connected and fixed. As described above, in the U-shape of the backflow prevention valve sealing portion 1d, the rib portion of the mounting portion 3a of the adapter member 3 is seen from above and below on the upper and lower surfaces of the U-shape, that is, the opposing surface P. By fitting so as to be sandwiched, the adapter member 3 and the backflow prevention valve 1 are hermetically connected.
Finally, the adapter member 3 to which the check valve 1 is connected is inserted from the outlet 6a of the joint pipe 6 with outlet, and the adapter member 3 is fitted and fixed to the joint pipe 6 with outlet.
At this time, the adapter member 3 includes the rotation lock type fitting portion 4 on the side surface of the lid portion 5, and after the adapter member 3 is disposed in the joint pipe 6 with the outlet, the adapter member 3 is rotated to some extent. Thus, the adapter member 3 can be fixed in the joint pipe 6 with the outlet.
At this time, the adapter sealing portion 2 provided at the outer periphery of the substantially U-shaped cross-sectional view of the backflow prevention valve sealing portion 1d continuously contacts the inner surface of the joint pipe 6 with an outlet along the periphery, Between the adapter member 3 and the inside of the joint pipe 6 with an outlet through the backflow prevention valve 1. Thereby, sealing is achieved between the outside of the backflow prevention valve 1 and the inside of the tube body T, and the closed portion 1c of the backflow prevention valve 1 is closed between the upstream side and the downstream side of the backflow prevention valve 1. In such a state, it is possible to prevent passage of drainage which is a fluid.
Further, the outlet 6 a is closed and sealed by the lid 5. An O-ring member O is provided on the side surface of the lid portion 5, and the outer surface of the lid portion 5 abuts the inner peripheral edge of the outlet 6 a via the O-ring member O, so that the outlet 6 a is watertight. Closed and sealed. As described above, the O-ring member O is made of a material having a relatively smooth surface and a good sliding property as compared with the material of the check valve 1, so that the adapter member 3 is fitted by a rotation lock. When combining, the degree of friction is reduced and workability is improved.

上記のように構成した洗面台Sの配管構造では、下水側の臭気や害虫類は、
1.排水が無い状態では逆流防止弁1の閉塞部1cは閉塞しており、逆流防止弁1の閉塞部1cを通過して下流側から上流側(屋内側)に逆流することはできない。
2.逆流防止弁1とアダプター部材3との間は、逆流防止弁密閉部1dと取付部3aとが嵌合していることと、取付部3aと逆流防止弁1の本体部1aに由来する弾性を備えた逆流防止弁密閉部1dとが水密的に当接することから、密閉されており、逆流防止弁1とアダプター部材3との間を通過して下流側から上流側(屋内側)に逆流することはできない。
3.管体T内面とアダプター部材3との間は、逆流防止弁1に設けたアダプター密閉部2が管体T内面に当接していることと、逆流防止弁1の本体部1aに由来する弾性を備えたアダプター密閉部2が、管体T内面と水密的に当接することから、密閉されており、アダプター部材3と管体T内面の間を通過して下流側から上流側(屋内側)に逆流することはできない。
また通気や排水の逆流が生じた場合でも、外周方向から圧力が加えられた場合では、閉塞部1cの対向する面同士がより強く当接するため、閉塞を維持し、下流側から上流側への通過、即ち逆流を防止する。
このようにして、配管構造内に配置された逆流防止弁1の上流側と下流側は、配管構造内を流体が上流から下流側へ適切に通過している状態以外の時は、逆流防止弁1の密閉により区画されている。
In the piping structure of the wash basin S configured as described above, the odor and pests on the sewage side are
1. In the state where there is no drainage, the closed portion 1c of the check valve 1 is closed, and it cannot pass back from the downstream side to the upstream side (indoor side) through the closed portion 1c of the check valve 1.
2. Between the backflow prevention valve 1 and the adapter member 3, the backflow prevention valve sealing part 1d and the attachment part 3a are fitted, and the elasticity derived from the attachment part 3a and the main body part 1a of the backflow prevention valve 1 is provided. Since the provided backflow prevention valve sealing portion 1d is in watertight contact with the backflow prevention valve sealing portion 1d, it is sealed and passes between the backflow prevention valve 1 and the adapter member 3 and flows backward from the downstream side to the upstream side (indoor side). It is not possible.
3. Between the inner surface of the tube body T and the adapter member 3, the adapter sealing portion 2 provided on the backflow prevention valve 1 is in contact with the inner surface of the tube body T, and elasticity derived from the main body portion 1 a of the backflow prevention valve 1 is obtained. Since the provided adapter sealing portion 2 is in watertight contact with the inner surface of the tube body T, the adapter is sealed, and passes between the adapter member 3 and the inner surface of the tube body T, from the downstream side to the upstream side (indoor side). It cannot be reversed.
Further, even when a reverse flow of ventilation or drainage occurs, when pressure is applied from the outer peripheral direction, the opposing surfaces of the closed portion 1c come into contact with each other more strongly, so that the closed state is maintained and the downstream side to the upstream side is maintained. The passage, that is, the backflow is prevented.
In this way, the upstream side and the downstream side of the backflow prevention valve 1 arranged in the piping structure are the backflow prevention valves when the fluid is properly passing through the piping structure from the upstream side to the downstream side. It is divided by 1 sealing.

洗面ボウルSB内部に排水が生じると、排水は、洗面排水口S1から、管体Tを介し、側面の管体部分8から取出口付き継手管6の内部に流入し、逆流防止弁1内部に溜まる。
逆流防止弁1内部に溜まった排水の重量/水圧により、逆流防止弁1の閉塞部1cは、弾性変形を生じて開口されるため、内部の排水が排出され、そのまま排水は取出口付き継手管6の下流側の管体部分8から、管体Tを介して下水側である床下配管に排出される。排水の排出が終了し、逆流防止弁1内部の排水が失われると、排水の重量/圧力が無くなったことで、閉塞部1cは再び弾性変形し、閉塞部1cを閉塞して、排水が完了する。
このように、本実施例の逆流防止弁1は、排水を上流側から下流側に排出することが可能である一方で、下流側から上流側(屋内側)への臭気や害虫類(及び排水)の逆流を防止する機能を有することから、排水トラップとして機能する。
When drainage is generated in the wash bowl SB, the drainage flows from the wash drain S1 through the tube T to the inside of the joint pipe 6 with the outlet from the side pipe portion 8, and into the backflow prevention valve 1. Accumulate.
The closed portion 1c of the backflow prevention valve 1 is elastically deformed and opened due to the weight / water pressure of the wastewater accumulated in the backflow prevention valve 1, so that the internal wastewater is discharged and the wastewater is directly connected to the joint pipe with an outlet. 6 is discharged from the downstream pipe portion 8 through the pipe T to the underfloor pipe on the sewage side. When the drainage of the drainage is finished and the drainage in the check valve 1 is lost, the drainage weight / pressure disappears, so that the closed portion 1c is elastically deformed again, and the closed portion 1c is closed to complete the drainage. To do.
As described above, the backflow prevention valve 1 of the present embodiment can discharge wastewater from the upstream side to the downstream side, while odors and pests (and wastewater from the downstream side to the upstream side (indoor side)). ) Functions as a drainage trap.

また、長期間の使用により、逆流防止弁1や配管構造内に塵芥などが堆積した場合、アダプター部材3と取出口付き継手管6との嵌合を解除し、アダプター部材3を管体である取出口付き継手管6の上端に設けた取出口6aから取り出すことで、逆流防止弁1やアダプター部材3の清掃を行うことができる。また、配管構造内部に塵芥等が溜まって管詰まりを生じた場合等は、アダプター部材3を取り出した後、取出口6aから高圧洗浄器やカンツール機など、管体Tの清掃器具を配管構造内部に挿通して、管詰まりを解消することができる。   Further, when dust or the like accumulates in the backflow prevention valve 1 or the piping structure due to long-term use, the adapter member 3 is released from the fitting pipe 6 with the outlet, and the adapter member 3 is a tubular body. The backflow prevention valve 1 and the adapter member 3 can be cleaned by taking out from the outlet 6a provided at the upper end of the joint pipe 6 with outlet. Also, when dust or the like accumulates inside the piping structure and the tube is clogged, the adapter member 3 is taken out, and then a cleaning tool for the tube body T such as a high pressure washer or a can tool machine is taken out from the outlet 6a. Pipe clogging can be eliminated by inserting inside.

次に、本発明の第二実施例について、図面を参照しつつ説明する。
図4乃至図6に示した、本発明の第二実施例の逆流防止弁を備えた配管構造は、以下に記載する、浴槽Bと、洗い場パンWと、管体Tや逆流防止弁1等からなる配管部材と、その他の部材より構成されてなる。
浴槽Bは、上方が開口した槽体であって、底面に、内部に溜めた浴湯を排出するための浴槽排水口B1を備えてなる。
洗い場パンWは、浴室の使用者が身体を洗うなどする、浴槽Bに隣接して備えられた防水パンであって、底面に洗い場パンW上の排水を排出するための洗い場パン排水口W1を備えてなる。
配管部材は、浴槽B内の排水や、洗い場パンW上に生じた排水を、浴槽排水口B1また洗い場排水口を介して下水側の配管に接続するための部材であって、以下に記載する管体T、アダプター部材3、逆流防止弁1、等より構成される。
管体Tは、洗面台Sの洗面ボウルSBより生じた排水を、下水側の排水主管に接続するための円筒状の部材であって、直線状の直管や、角度を持って屈曲したエルボ管、また下記に詳述する流入口付き継手管7等の種類がある。これらは硬質樹脂、または金属材などから構成され、ナット部材や、接着剤などを利用して接続される。
流入口付き継手管7は、管体Tの一種であって、略円筒形状であって、上方に流入口7aを、側面の対向位置に、上下に分かれるようにして他の配管部材(管体T)との接続用の管体部分8を、それぞれ備えてなる。また、流入口7aは洗い場排水口に対して水密的に接続可能に構成されてなる。尚流入口7aの内側面には、後述するアダプター部材3の回転ロック式嵌合部4と嵌合する突起部9を備えてなる。
アダプター部材3は、略円筒形状の部材であって、円筒形状の上端から下端に向かって、アダプター部材3内部に流体(本実施例の場合排水)が通過する流路部3bを備えてなる。
また、下流側の端部であって、流路部3bの下流側端部の外周部分に、逆流防止弁密閉部1dに密閉的に当接し、嵌合する、取付部3aを備えてなる。
取付部3aについて詳述すると、流路部3bの下流側端部の外周部分に、周縁に沿って連続して設けられる、断面略コの字形状の部分であって、コの字の開口が外側方向を向いて形成されてなる。このようにコの字形状としたことで、コの字の上側の面と下側の面、即ち対向する面Pが形成されてなる。
尚、アダプター部材3は、側面部分にて、回転ロック式嵌合部4を備えてなり、アダプター部材3を流入口付き継手管7内に配置した後、アダプター部材3をある程度回転させることで、回転ロック式嵌合部4と突起部9を嵌合させ、アダプター部材3を流入口付き継手管7内に固定することができる。
逆流防止弁1は、配管構造の内部に配置固定される、シリコンゴムなど弾性を有する素材から構成される部材であって、略筒形状にして本体部1aと、本体部1aの上流側の端部に備えた開口部1bと、本体部1aの下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部1cと、を備えてなる。
この逆流防止弁1は、上記のように構成したことで、上流側の端部である開口部1bから排水が流入すると、その重量/水圧により、下流側の閉塞部1cが弾性変形し、開口して内部の排水を排出する。排水の排出が完了し、内部の排水の量が減少すると、開口した閉塞部1cが弾性により元の閉塞状態に変形し、閉塞部1cが閉塞する。
下流側から屋内側に臭気や排水、害虫類などが逆流しようとした場合、配管の途中に配置されたこの逆流防止弁1の閉塞部1cが閉塞していることにより、通過することができないため、この逆流防止弁1よりも上流側に逆流することができない。また通気や排水の逆流が生じた場合でも、外周方向から圧力が加えられた場合では、閉塞部1cの対向する面同士がより強く当接するため、閉塞を維持し、下流側から上流側への通過、即ち逆流を防止する。
このように、排水を行う配管構造の内部に配置され、下流側から屋内側への臭気や害虫類の逆流を防止する部材を、排水トラップと呼ぶ。尚、排水トラップは臭気や害虫類の逆流を防止する機能が必須である一方で、排水の逆流に対しては防止する機能が必須では無いが、この第二実施例の排水トラップである逆流防止弁1は、排水などに対しても逆流を防止する機能を有している。
更に本第二実施例の逆流防止弁1には、弾性を有する本体部1aと一体に構成される逆流防止弁密閉部1dが備えられてなる。
該逆流防止弁密閉部1dについて詳述すると、本体部1aの内周縁に、内周縁に沿って連続して設けられるリブ部分であって、取付部3aのコの字の内部に嵌合するように形成されてなる。
また、逆流防止弁密閉部1dの外周部分に、周縁に沿って連続して設けた凸条からなるアダプター密閉部2を設けてなる。該アダプター密閉部2は、アダプター部材3に取り付けられた逆流防止弁1を、流入口付き継手管7内に配置したとき、アダプター密閉部2の凸条の外側面が、流入口付き継手管7の、内側面であって、上流の管体部分8と下流側の管体部分8の間に配置され、アダプター部材3と、管体である流入口付き継手管7の内部との間で密閉を生じるように構成されてなる。
Next, a second embodiment of the present invention will be described with reference to the drawings.
The pipe structure provided with the backflow prevention valve according to the second embodiment of the present invention shown in FIGS. 4 to 6 includes the bathtub B, the washing pan W, the tube T, the backflow prevention valve 1 and the like described below. It is comprised from the piping member which consists of, and another member.
The bathtub B is a tank body whose upper side is open, and is provided with a bathtub drainage port B1 for discharging the bath water stored in the inside on the bottom surface.
The washing place pan W is a waterproof pan provided adjacent to the bathtub B where the user of the bathroom is washing the body and the like. Prepare.
The piping member is a member for connecting the drainage in the bathtub B or the drainage generated on the washing ground pan W to the piping on the sewage side through the bathtub drainage port B1 or the washing ground drainage port, and is described below. It is comprised from the pipe body T, the adapter member 3, the backflow prevention valve 1, etc.
The tube T is a cylindrical member for connecting the waste water generated from the wash bowl SB of the wash basin S to the drain main pipe on the sewage side, and is a straight straight pipe or an elbow bent at an angle. There are types of pipes and joint pipes 7 with inlets which will be described in detail below. These are composed of a hard resin, a metal material, or the like, and are connected using a nut member or an adhesive.
The joint pipe 7 with the inflow port is a kind of the tube T, and has a substantially cylindrical shape, and is divided into other pipe members (tube bodies) so that the inflow port 7a is divided upward and downward at the opposite position on the side surface. Tube portions 8 for connection with T) are provided. In addition, the inflow port 7a is configured to be watertightly connectable to the washroom drain port. In addition, the inner surface of the inflow port 7a is provided with a protruding portion 9 that is fitted to a rotation lock type fitting portion 4 of the adapter member 3 described later.
The adapter member 3 is a substantially cylindrical member, and includes a flow path portion 3b through which fluid (drainage in the present embodiment) passes inside the adapter member 3 from the upper end to the lower end of the cylindrical shape.
In addition, an attachment portion 3a is provided on the downstream end portion of the downstream end portion of the flow path portion 3b. The attachment portion 3a is in abutment with and fitted to the backflow prevention valve sealing portion 1d.
The mounting portion 3a will be described in detail. A portion having a substantially U-shaped cross section, which is continuously provided along the periphery of the outer peripheral portion of the downstream end portion of the flow path portion 3b. It is formed facing outward. By adopting the U shape in this way, the upper surface and the lower surface of the U shape, that is, the opposing surface P is formed.
In addition, the adapter member 3 is provided with a rotation lock type fitting portion 4 at the side surface portion, and after the adapter member 3 is disposed in the joint pipe 7 with an inlet, by rotating the adapter member 3 to some extent, The adapter member 3 can be fixed in the joint pipe 7 with the inflow port by fitting the rotation lock type fitting part 4 and the protruding part 9.
The backflow prevention valve 1 is a member made of an elastic material such as silicon rubber, which is disposed and fixed inside the piping structure, and has a substantially cylindrical shape, and a main body portion 1a and an upstream end of the main body portion 1a. An opening portion 1b provided in the portion, and a closing portion 1c provided at the end portion on the downstream side of the main body portion 1a, which is closed by contacting with an inclined surface so that the opposing surfaces gradually approach each other. It becomes.
Since the backflow prevention valve 1 is configured as described above, when drainage flows from the opening 1b that is the upstream end, the downstream blocking portion 1c is elastically deformed by its weight / water pressure, and the opening And drain the internal drainage. When the drainage is completed and the amount of the internal drainage is reduced, the opened closing portion 1c is elastically deformed to the original closed state, and the closing portion 1c is closed.
When odor, drainage, pests, etc. try to flow backward from the downstream side to the indoor side, the closed portion 1c of the backflow prevention valve 1 arranged in the middle of the piping is blocked and cannot pass therethrough. Therefore, it is not possible to reversely flow upstream from the check valve 1. Further, even when a reverse flow of ventilation or drainage occurs, when pressure is applied from the outer peripheral direction, the opposing surfaces of the closed portion 1c come into contact with each other more strongly, so that the closed state is maintained and the downstream side to the upstream side is maintained. The passage, that is, the backflow is prevented.
In this way, a member that is disposed inside the piping structure that drains water and prevents backflow of odors and pests from the downstream side to the indoor side is called a drain trap. Although the drain trap has a function to prevent the backflow of odors and pests, the drain trap does not necessarily have a function to prevent the backflow of drainage. However, the drain trap is the drain trap of the second embodiment. The valve 1 has a function of preventing a backflow against drainage or the like.
Further, the backflow prevention valve 1 according to the second embodiment is provided with a backflow prevention valve sealing portion 1d configured integrally with the elastic main body portion 1a.
The backflow prevention valve sealing part 1d will be described in detail. The rib part is provided continuously along the inner peripheral edge of the main body part 1a so as to fit inside the U-shape of the attachment part 3a. Formed.
Moreover, the adapter sealing part 2 which consists of the protruding item | line provided continuously along the periphery is provided in the outer peripheral part of the backflow prevention valve sealing part 1d. The adapter sealing portion 2 is configured such that when the backflow prevention valve 1 attached to the adapter member 3 is disposed in the joint pipe 7 with an inlet, the outer side surface of the ridge of the adapter sealing section 2 is connected to the joint pipe 7 with an inlet. The inner surface of the pipe member 8 is disposed between the upstream tube portion 8 and the downstream tube portion 8, and is sealed between the adapter member 3 and the inside of the joint pipe 7 with an inlet which is a tube body. It is comprised so that it may produce.

上記の各部材から構成される浴槽・浴室の逆流防止弁1を備えた配管構造は、以下のようにして施工され、排水を下水側に排出する。
洗い場排水口に、流入口付き継手管7の流入口7aを接続固定する。次に、流入口付き継手管7の上流側の管体部分8を浴槽排水口B1に、下流側の管体部分8を下水側の配管に、それぞれ管体Tによって配管接続する。管体Tの接続部分はパッキングを利用したナット締め固定、または接着剤を利用した接着固定で行い、各接続部分を漏水等が生じないように充分な密閉強度にて接続する。また配管接続に際しては、直線状の管体Tをカットすることで位置あわせを行う。
また、アダプター部材3に逆流防止弁1を接続する。この接続においては、逆流防止弁1の逆流防止弁密閉部1dを、アダプター部材3の取付部3aに嵌合させて取り付ける。具体的には、配管部材であるアダプター部材3の取付部3aの断面略コの字形状の部分において、コの字の開口から、コの字の内部に、逆流防止弁1の逆流防止弁密閉部1dのリブ部分を収納するようにして嵌合させることで、アダプター部材3に逆流防止弁1を密閉的に嵌合させ、接続固定する。このように、取付部3aのコの字形状において、コの字の上側の面と下側の面、即ち対向する面Pに、逆流防止弁1の逆流防止弁密閉部1dのリブ部分が、上下から挟持されるようにして嵌合することで、アダプター部材3と逆流防止弁1の間が密閉的に接続される。
最後に、流入口付き継手管7の流入口7aから、逆流防止弁1を接続したアダプター部材3を挿入し、アダプター部材3を流入口付き継手管7に嵌合固定させる。
この時には、アダプター部材3は、アダプター部材3の側面にて、回転ロック式嵌合部4を備えてなり、アダプター部材3を流入口付き継手管7内に配置した後、アダプター部材3をある程度回転させることで、アダプター部材3を流入口付き継手管7内に固定することができる。
また、逆流防止弁密閉部1dの外周部分に設けたアダプター密閉部2が、流入口付き継手管7の内面に、周縁に沿って連続して当接し、上流の管体部分8と下流側の管体部分8の間に配置され、逆流防止弁1を介して、アダプター部材3と流入口付き継手管7の内部との間で密閉を生じる。これにより、逆流防止弁1の外部と管体Tの内部との間で密閉が達成され、逆流防止弁1の上流側と下流側の間で、逆流防止弁1の閉塞部1cが閉塞されている状態において、流体である排水の通過が生じないようにすることができる。
The piping structure provided with the backflow prevention valve 1 for the bathtub / bathroom constituted by each of the above members is constructed as follows and discharges the wastewater to the sewage side.
The inlet 7a of the joint pipe 7 with the inlet is connected and fixed to the washing ground drain. Next, the pipe portion 8 on the upstream side of the joint pipe 7 with the inlet is connected to the bathtub drain B1 and the pipe portion 8 on the downstream side is connected to the sewage side pipe by the pipe T. The connecting portion of the tube body T is fixed by nut tightening using packing or adhesive fixing using an adhesive, and the connecting portions are connected with sufficient hermetic strength so that water leakage does not occur. Further, when piping is connected, alignment is performed by cutting the straight tubular body T.
Further, the backflow prevention valve 1 is connected to the adapter member 3. In this connection, the backflow prevention valve sealing portion 1 d of the backflow prevention valve 1 is fitted and attached to the attachment portion 3 a of the adapter member 3. Specifically, the backflow prevention valve 1 of the backflow prevention valve 1 is sealed from the opening of the U shape into the inside of the U shape at the portion of the mounting portion 3a of the adapter member 3 which is a piping member. By fitting the rib portion of the portion 1d so as to be accommodated, the backflow prevention valve 1 is hermetically fitted to the adapter member 3 and connected and fixed. Thus, in the U-shape of the mounting portion 3a, the rib portion of the backflow prevention valve sealing portion 1d of the backflow prevention valve 1 is formed on the upper surface and the lower surface of the U shape, that is, the opposing surface P. By fitting so as to be sandwiched from above and below, the adapter member 3 and the backflow prevention valve 1 are hermetically connected.
Finally, the adapter member 3 to which the check valve 1 is connected is inserted from the inlet 7a of the joint pipe 7 with the inlet, and the adapter member 3 is fitted and fixed to the joint pipe 7 with the inlet.
At this time, the adapter member 3 is provided with a rotation lock type fitting portion 4 on the side surface of the adapter member 3, and after the adapter member 3 is disposed in the joint pipe 7 with the inlet, the adapter member 3 is rotated to some extent. By doing so, the adapter member 3 can be fixed in the joint pipe 7 with an inflow port.
Further, the adapter sealing portion 2 provided on the outer peripheral portion of the backflow prevention valve sealing portion 1d continuously contacts the inner surface of the joint pipe 7 with an inlet along the peripheral edge, and is connected to the upstream tube portion 8 and the downstream side. It arrange | positions between the pipe-body parts 8, and produces sealing between the adapter member 3 and the inside of the coupling pipe 7 with an inflow port through the backflow prevention valve 1. FIG. Thereby, sealing is achieved between the outside of the backflow prevention valve 1 and the inside of the tube body T, and the closed portion 1c of the backflow prevention valve 1 is closed between the upstream side and the downstream side of the backflow prevention valve 1. In such a state, it is possible to prevent passage of drainage which is a fluid.

上記のように構成した浴槽・浴室の配管構造では、下水側の臭気や害虫類は、
1.排水が無い状態では逆流防止弁1の閉塞部1cは閉塞しており、逆流防止弁1の閉塞部1cを通過して下流側から上流側(屋内側)に逆流することはできない。
2.逆流防止弁1とアダプター部材3との間は、逆流防止弁密閉部1dと取付部3aとが嵌合していることと、取付部3aと逆流防止弁1に由来する弾性を備えた逆流防止弁密閉部1dとが水密的に当接することから、密閉されており、逆流防止弁1とアダプター部材3との間を通過して下流側から上流側(屋内側)に逆流することはできない。
3.管体T内面とアダプター部材3との間は、逆流防止弁1に設けたアダプター密閉部2が管体T内面に当接していることと、逆流防止弁1の本体部1aに由来する弾性を備えたアダプター密閉部2が、管体T内面と水密的に当接することから、密閉されており、アダプター部材3と管体T内面の間を通過して下流側から上流側(屋内側)に逆流することはできない。
また通気や排水の逆流が生じた場合でも、外周方向から圧力が加えられた場合では、閉塞部1cの対向する面同士がより強く当接するため、閉塞を維持し、下流側から上流側への通過、即ち逆流を防止する。
このようにして、配管構造内に配置された逆流防止弁の上流側と下流側は、配管構造内を流体が上流から下流側へ適切に通過している状態以外の時は、逆流防止弁の密閉により区画されている。
In the bathtub / bathroom piping structure configured as described above, sewage odors and pests
1. In the state where there is no drainage, the closed portion 1c of the check valve 1 is closed, and it cannot pass back from the downstream side to the upstream side (indoor side) through the closed portion 1c of the check valve 1.
2. Between the backflow prevention valve 1 and the adapter member 3, the backflow prevention valve sealing part 1d and the attachment part 3a are fitted, and the backflow prevention is provided with elasticity derived from the attachment part 3a and the backflow prevention valve 1. Since the valve sealing portion 1d is in watertight contact with the valve sealing portion 1d, the valve sealing portion 1d is sealed and cannot pass back from the downstream side to the upstream side (indoor side) through the space between the backflow prevention valve 1 and the adapter member 3.
3. Between the inner surface of the tube body T and the adapter member 3, the adapter sealing portion 2 provided on the backflow prevention valve 1 is in contact with the inner surface of the tube body T, and elasticity derived from the main body portion 1 a of the backflow prevention valve 1 is obtained. Since the provided adapter sealing portion 2 is in watertight contact with the inner surface of the tube body T, the adapter is sealed, and passes between the adapter member 3 and the inner surface of the tube body T, from the downstream side to the upstream side (indoor side). It cannot be reversed.
Further, even when a reverse flow of ventilation or drainage occurs, when pressure is applied from the outer peripheral direction, the opposing surfaces of the closed portion 1c come into contact with each other more strongly, so that the closed state is maintained and the downstream side to the upstream side is maintained. The passage, that is, the backflow is prevented.
In this way, the upstream side and the downstream side of the backflow prevention valve arranged in the piping structure are not connected to the backflow prevention valve except when the fluid is properly passing through the piping structure from the upstream side to the downstream side. It is partitioned by sealing.

浴槽排水口B1上に排水が生じると、排水は、浴槽排水口B1から、管体Tを介し、側面の管体部分8から流入口付き継手管7の内部に流入し、逆流防止弁1内部に溜まる。
逆流防止弁1内部に溜まった排水の重量/水圧により、逆流防止弁1の閉塞部1cは、弾性変形を生じて開口されるため、内部の排水が排出され、そのまま排水は流入口付き継手管7の下流側の管体部分8から、管体Tを介して下水側の配管に排出される。排水の排出が終了し、逆流防止弁1内部の排水が失われると、排水の重量/圧力が無くなったことで、閉塞部1cは再び弾性変形し、閉塞部1cを閉塞して、排水が完了する。
また、洗い場パンW上に排水が生じると、排水は、洗い場パン排水口W1から、流入口7aを介し、流入口付き継手管7の内部に流入し、逆流防止弁1内部に溜まる。以下は浴槽排水口B1からの排水と同様の手順にて排水が行われ、洗い場パンW上に生じた排水の排水が完了する。
このように、本実施例の逆流防止弁1は、排水を上流側から下流側に排出することが可能である一方で、下流側から上流側(屋内側)への臭気や害虫類の逆流を防止する機能を有することから、排水トラップとして機能する。
When drainage is generated on the bathtub drain B1, the drainage flows from the bathtub drain B1 through the tube T to the inside of the joint pipe 7 with the inflow port from the side pipe part 8, and inside the check valve 1. It collects in.
The closed portion 1c of the backflow prevention valve 1 is elastically deformed and opened due to the weight / water pressure of the wastewater accumulated in the backflow prevention valve 1, so that the internal wastewater is discharged and the wastewater is directly connected to the joint pipe with an inlet. 7 is discharged from the tube portion 8 on the downstream side through the tube T to the sewage-side piping. When the drainage of the drainage is finished and the drainage in the check valve 1 is lost, the drainage weight / pressure disappears, so that the closed portion 1c is elastically deformed again, and the closed portion 1c is closed to complete the drainage. To do.
Further, when wastewater is generated on the washing place pan W, the wastewater flows into the inside of the joint pipe 7 with the inflow port from the washing place pan drainage port W1 through the inflow port 7a and accumulates in the backflow prevention valve 1. In the following, drainage is performed in the same procedure as the drainage from the bathtub drain B1, and drainage of the drainage generated on the wash basin pan W is completed.
As described above, the backflow prevention valve 1 of the present embodiment can discharge the wastewater from the upstream side to the downstream side, while preventing the backflow of odors and pests from the downstream side to the upstream side (indoor side). Since it has a function to prevent, it functions as a drain trap.

また、長期間の使用により、逆流防止弁1や配管構造内に塵芥などが堆積した場合、アダプター部材3と流入口付き継手管7との嵌合を解除し、アダプター部材3を管体である流入口付き継手管7の上端に設けた流入口7aから取り出すことで、逆流防止弁1やアダプター部材3の清掃を行うことができる。また、配管構造内部に塵芥等が溜まって管詰まりを生じた場合等は、アダプター部材3を取り出した後、流入口7aから高圧洗浄器やカンツール機など、管体Tの清掃器具を配管構造内部に挿通して、管詰まりを解消することができる。   Further, when dust or the like accumulates in the backflow prevention valve 1 or the piping structure due to long-term use, the adapter member 3 is released from the fitting pipe 7 with the inlet, and the adapter member 3 is a tubular body. By taking out from the inlet 7a provided in the upper end of the joint pipe 7 with an inlet, the backflow prevention valve 1 and the adapter member 3 can be cleaned. In addition, when dust or the like accumulates inside the piping structure and the pipe is clogged, the adapter member 3 is taken out, and then a cleaning tool for the tubular body T such as a high pressure washer or a can tool machine is connected to the piping structure from the inlet 7a. Pipe clogging can be eliminated by inserting inside.

次に、本発明の第三実施例について、図面を参照しつつ説明する。
図7乃至図9に示した、本発明の第三実施例の逆流防止弁1を備えた配管構造は、以下に記載する、換気ファンFと、管体T等からなる配管部材(換気ダクト管)と、その他の部材より構成されてなる。
換気ファンFは屋内と屋外との間で通気を行うための、空気の流れを生じさせる部材である。本実施例では屋内から屋外へ通気を行うために、屋内から屋外に向かって空気の流れを生じさせる(従って、屋内側が上流、屋外側が下流となる)。
配管部材は、屋内と屋外との間で通気を行うための、換気ファンFから屋外側への空気の流れを導くための部材であって、以下に記載する管体T、アダプター部材3、逆流防止弁1等より構成される。
管体Tは、内部に空気が流れる、アルミニウム等の金属材によって構成される筒状の部材であって、直線状の直管や、角度を持って屈曲したエルボ管、また下記に詳述する取出口付き継手管6等の種類がある。これらの管体Tは、ビスとナット部材などを利用して接続し、換気ファンFから目的とする部屋(又は位置)までつり下げ金具Kなどを利用し、天井につり下げるようにして配管する。
取出口付き継手管6は、管体Tの一種であって、略円筒形状であって、側面に取出口6aを、円筒の両端に他の配管部材(管体T)との接続部分を、それぞれ備えてなる。また、取出口6aを閉塞する蓋部5を備えてなる。
アダプター部材3は、略円筒形状の部材であって、円筒形状の部材の両端に、アダプター部材3内部に流体(本実施例の場合空気)が通過する流路部3bを備えてなる。
また、下流側の端部であって、流路部3bの下流側端部の外周部分に、逆流防止弁密閉部1dに密閉的に当接し、嵌合する、断面凹形状に屈曲する事で、上流方向に向かって凸となるリブ部分を周縁に沿って備えた取付部3aを備えてなる。
逆流防止弁1は、配管構造の内部に配置固定される、シリコンゴムなど弾性を有する素材から構成される部材であって、略筒形状にして本体部1aと、本体部1aの上流側の端部に備えた開口部1bと、本体部1aの下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部1cと、を備えてなる。
更に本第三実施例の逆流防止弁1には、弾性を有する本体部1aと一体に構成される逆流防止弁密閉部1dが備えられてなる。
該逆流防止弁密閉部1dについて詳述すると、本体部1aの内周縁に、内周縁に沿って連続して設けられる、断面略コの字形状の部分であって、コの字の開口が下流側方向を向いて形成されてなる。このようにコの字形状としたことで、コの字の上側の面と下側の面、即ち対向する面Pが形成されてなる。
また、逆流防止弁密閉部1dの断面視略コの字形状の外周部分に、コの字の外周部分に周縁に沿って連続して設けた凸条からなるアダプター密閉部2を設けてなる。該アダプター密閉部2は、アダプター部材3に取り付けられた逆流防止弁1を、取出口付き継手管6内に配置したとき、アダプター密閉部2の凸条の外側面が、取出口付き継手管6の、内周面であって、アダプター部材3と、管体である取出口付き継手管6の内部で密閉を生じるように構成されてなる。
この逆流防止弁1は、上記のように構成したことで、換気ファンF等を作動させる事などで上流側の端部である開口部1bから正圧を作用されるか、または下流側から負圧が作用されるかして、下流側に比べ上流側の圧力が増大すると、その圧力差により、下流側の閉塞部1cが弾性変形し、開口して上流側から下流側へ内部の空気を通気させる。換気ファンFが停止する等して上流側と下流側の気圧差が無くなると、開口した閉塞部1cが弾性により元の閉塞状態に変形し、閉塞部1cが閉塞する。
上流側に比べ下流側の圧力が増大した場合、外周方向から圧力が加えられる事となり、閉塞部1cの対向する面同士がより強く当接するため、閉塞を維持し、下流側から上流側への通過、即ち逆流を防止する。
また、逆流防止弁密閉部1dの外周部分に、周縁に沿って連続して設けた凸条からなるアダプター密閉部2を設けてなる。該アダプター密閉部2は、アダプター部材3に取り付けられた逆流防止弁1を、取出口付き継手管6内に配置したとき、アダプター密閉部2の凸条の外側面が、取出口付き継手管6の、アダプター部材3と、管体である取出口付き継手管6の内部との間で密閉を生じるように構成されてなる。
Next, a third embodiment of the present invention will be described with reference to the drawings.
The piping structure provided with the backflow prevention valve 1 of the third embodiment of the present invention shown in FIGS. 7 to 9 is a piping member (ventilation duct pipe) composed of a ventilation fan F and a tubular body T described below. ) And other members.
The ventilation fan F is a member that generates an air flow for ventilation between the indoor and the outdoor. In this embodiment, in order to ventilate from indoor to outdoor, an air flow is generated from indoor to outdoor (therefore, the indoor side is upstream and the outdoor side is downstream).
The piping member is a member for guiding the air flow from the ventilation fan F to the outdoor side for ventilation between the indoor and the outdoor. The pipe member T, the adapter member 3, and the backflow described below It consists of a prevention valve 1 and the like.
The tube T is a cylindrical member made of a metal material such as aluminum through which air flows, and is a straight straight tube, an elbow bent at an angle, and detailed below. There are types such as a joint pipe 6 with an outlet. These pipes T are connected by using screws and nut members, etc., and are piped from the ventilation fan F to the target room (or position) by using a metal fitting K or the like and suspended from the ceiling. .
The joint pipe 6 with an outlet is a kind of a tubular body T, is substantially cylindrical, has an outlet 6a on a side surface, and connecting portions with other piping members (tubular T) on both ends of the cylinder. Each is provided. Moreover, the cover part 5 which closes the outlet 6a is provided.
The adapter member 3 is a substantially cylindrical member, and is provided with a flow path portion 3b through which fluid (air in the present embodiment) passes inside the adapter member 3 at both ends of the cylindrical member.
Further, by bending to the downstream end portion, the outer peripheral portion of the downstream end portion of the flow path portion 3b, sealingly contacting and fitting the backflow prevention valve sealing portion 1d. The mounting portion 3a includes a rib portion that protrudes toward the upstream direction along the periphery.
The backflow prevention valve 1 is a member made of an elastic material such as silicon rubber, which is disposed and fixed inside the piping structure, and has a substantially cylindrical shape, and a main body portion 1a and an upstream end of the main body portion 1a. An opening portion 1b provided in the portion, and a closing portion 1c provided at the end portion on the downstream side of the main body portion 1a, which is closed by contacting with an inclined surface so that the opposing surfaces gradually approach each other. It becomes.
Further, the backflow prevention valve 1 of the third embodiment is provided with a backflow prevention valve sealing portion 1d configured integrally with the elastic main body portion 1a.
The backflow prevention valve sealing portion 1d will be described in detail. A substantially U-shaped cross section is provided on the inner peripheral edge of the main body 1a continuously along the inner peripheral edge. It is formed facing the side direction. By adopting the U shape in this way, the upper surface and the lower surface of the U shape, that is, the opposing surface P is formed.
Further, an adapter sealing portion 2 made of a ridge continuously provided along the peripheral edge of the U-shaped outer peripheral portion is provided on the outer peripheral portion of the substantially U-shaped cross-sectional view of the backflow prevention valve sealing portion 1d. The adapter sealing portion 2 is configured such that when the backflow prevention valve 1 attached to the adapter member 3 is disposed in the joint pipe 6 with an outlet, the outer surface of the protruding portion of the adapter sealing section 2 is connected to the joint pipe 6 with an outlet. These are the inner peripheral surfaces of the adapter member 3 and the joint pipe 6 with outlet, which is a tubular body, and is configured to be sealed.
Since the backflow prevention valve 1 is configured as described above, positive pressure is applied from the opening 1b which is the upstream end by operating the ventilation fan F or the like, or negative pressure is generated from the downstream side. If the pressure is applied, and the upstream pressure increases compared to the downstream side, the downstream closed portion 1c is elastically deformed due to the pressure difference, and the air is opened from the upstream side to the downstream side. Allow to vent. When the air pressure difference between the upstream side and the downstream side disappears, for example, when the ventilation fan F is stopped, the opened closed portion 1c is deformed to the original closed state due to elasticity, and the closed portion 1c is closed.
When the pressure on the downstream side is increased compared to the upstream side, the pressure is applied from the outer peripheral direction, and the opposing surfaces of the closed portion 1c come into contact with each other more strongly, so that the closed state is maintained and the downstream side to the upstream side is maintained. The passage, that is, the backflow is prevented.
Moreover, the adapter sealing part 2 which consists of the protruding item | line provided continuously along the periphery is provided in the outer peripheral part of the backflow prevention valve sealing part 1d. The adapter sealing portion 2 is configured such that when the backflow prevention valve 1 attached to the adapter member 3 is disposed in the joint pipe 6 with an outlet, the outer surface of the protruding portion of the adapter sealing section 2 is connected to the joint pipe 6 with an outlet. The adapter member 3 and the inside of the joint pipe 6 with an outlet, which is a pipe body, are configured to be sealed.

上記の各部材から構成される換気ファンFの逆流防止弁を備えた配管構造は、以下のようにして施工され、屋内から屋外への通気(換気)を行う。
建物の、屋外に面した位置の開口に、換気ファンFを設置する。
次に、換気を行う対象の部屋(位置)から、換気ファンF迄を、つり下げ金具K等を利用しつつ、途中に取出口付き継手管6を介して、配管接続する。接続部分はビスとナット部材等を利用したナット締め固定等で行い、各接続部分を通気洩れが生じないように充分な密閉強度にて接続する。
また、アダプター部材3に逆流防止弁1を接続する。この接続においては、逆流防止弁1の逆流防止弁密閉部1dを、アダプター部材3の取付部3aに嵌合させて取り付ける。具体的には、逆流防止弁密閉部1dの断面略コの字形状の部分において、コの字の開口から、コの字の内部に、アダプター部材3の取付部3aのリブ部分を収納するようにして嵌合させることで、アダプター部材3に逆流防止弁1を接続固定する。このように、逆流防止弁密閉部1dのコの字形状において、コの字の内側の面と外側の面、即ち対向する面Pに、アダプター部材3の取付部3aのリブ部分が内側と外側から挟持されるようにして嵌合することで、アダプター部材3と逆流防止弁1の間が密閉的に接続される。
最後に、取出口付き継手管6の取出口6aから、逆流防止弁1を接続したアダプター部材3を挿入し、アダプター部材3を取出口付き継手管6に嵌合固定させる。
この時には、取出口6aからアダプター部材3を挿入し、取出口6よりも下流の、管体Tの内側面に開口が無い部分にスライドさせる。この時、逆流防止弁密閉部1dの断面視略コの字形状の外周部分に設けたアダプター密閉部2が、管体Tの内側面に、周縁に沿って連続して当接し、逆流防止弁1を介して、アダプター部材3と取出口付き継手管6の内部との間で密閉を生じる。
これにより、逆流防止弁1の外周と管体である取出口付き継手管6の内周との間で密閉が達成され、逆流防止弁1の上流側と下流側の間で、逆流防止弁1の閉塞部1cが閉塞されている状態において、流体である空気の通過が生じないようにすることができる。
最後に、蓋部5により取出口6aを閉塞して、建物の換気の為の換気ファンの、逆流防止弁を備えた配管構造の施工が完了する。
The piping structure provided with the backflow prevention valve of the ventilation fan F composed of the above members is constructed as follows, and ventilates (ventilates) indoors to outdoors.
A ventilation fan F is installed in the opening of the building facing the outside.
Next, piping from the room (position) to be ventilated to the ventilation fan F is connected via the joint pipe 6 with an outlet on the way using the hanging bracket K or the like. The connecting parts are fixed by tightening nuts using screws and nut members, etc., and each connecting part is connected with a sufficient sealing strength so that air leakage does not occur.
Further, the backflow prevention valve 1 is connected to the adapter member 3. In this connection, the backflow prevention valve sealing portion 1 d of the backflow prevention valve 1 is fitted and attached to the attachment portion 3 a of the adapter member 3. Specifically, the rib portion of the attachment portion 3a of the adapter member 3 is accommodated in the U-shaped opening from the U-shaped opening in the substantially U-shaped section of the backflow prevention valve sealing portion 1d. Thus, the backflow prevention valve 1 is connected and fixed to the adapter member 3. As described above, in the U-shape of the backflow prevention valve sealing portion 1d, the rib portions of the mounting portion 3a of the adapter member 3 are located on the inner side and the outer side on the inner surface and the outer surface, that is, the opposing surface P of the U shape. The adapter member 3 and the backflow prevention valve 1 are hermetically connected by being fitted so as to be sandwiched from each other.
Finally, the adapter member 3 to which the check valve 1 is connected is inserted from the outlet 6a of the joint pipe 6 with outlet, and the adapter member 3 is fitted and fixed to the joint pipe 6 with outlet.
At this time, the adapter member 3 is inserted from the outlet 6a, and is slid to a portion downstream of the outlet 6 and having no opening on the inner side surface of the tube T. At this time, the adapter sealing portion 2 provided on the outer peripheral portion of the substantially U-shaped cross-sectional view of the backflow prevention valve sealing portion 1d continuously contacts the inner side surface of the tube body T along the peripheral edge. 1, a seal is generated between the adapter member 3 and the inside of the joint pipe 6 with an outlet.
Thereby, sealing is achieved between the outer periphery of the backflow prevention valve 1 and the inner periphery of the joint pipe 6 with a take-out port, and the backflow prevention valve 1 is located between the upstream side and the downstream side of the backflow prevention valve 1. In the state where the closed portion 1c is closed, passage of air as a fluid can be prevented.
Finally, the outlet 6a is closed by the lid 5, and the construction of the piping structure including the backflow prevention valve of the ventilation fan for ventilation of the building is completed.

上記のように構成した換気ファンFの配管構造では、
1.通気が無い状態では逆流防止弁1の閉塞部1cは閉塞しており、逆流防止弁1の閉塞部1cを通過して下流側(屋外側)から上流側(屋内側)に空気が逆流することはない。
2.逆流防止弁1とアダプター部材3との間は、逆流防止弁密閉部1dと取付部3aとが嵌合していることと、逆流防止弁1の本体部1aに由来する弾性により逆流防止弁密閉部1dと取付部3aとが気密的に当接することから、密閉されており、逆流防止弁1とアダプター部材3との間を通過して下流側(屋外側)から上流側(屋内側)に空気が逆流することはない。
3.管体T内面とアダプター部材3との間は、逆流防止弁1に設けたアダプター密閉部2が管体T内面に当接していることと、逆流防止弁1の本体部1aに由来する弾性によりアダプター密閉部2が管体T内面と逆流防止弁1を介して気密的に当接することから、密閉されており、逆流防止弁1とアダプター部材3との間を通過して下流側(屋外側)から上流側(屋内側)に空気が逆流することはない。
このようにして、配管内に配置された逆流防止弁1の上流側(屋内側)と下流側(屋外側)は、配管内を空気が上流側(屋内側)から下流側(屋外側)へ適切に通過している状態以外の時は、逆流防止弁1の密閉により区画されている。
In the piping structure of the ventilation fan F configured as described above,
1. When there is no ventilation, the closed portion 1c of the check valve 1 is closed and air flows backward from the downstream side (outdoor side) to the upstream side (indoor side) through the closed portion 1c of the check valve 1. There is no.
2. Between the backflow prevention valve 1 and the adapter member 3, the backflow prevention valve sealing portion 1d and the mounting portion 3a are fitted, and the backflow prevention valve is sealed due to the elasticity derived from the main body portion 1a of the backflow prevention valve 1. Since the portion 1d and the mounting portion 3a are in airtight contact with each other, they are sealed and pass between the backflow prevention valve 1 and the adapter member 3 from the downstream side (outdoor side) to the upstream side (indoor side). Air does not flow backwards.
3. Between the inner surface of the tube body T and the adapter member 3, the adapter sealing portion 2 provided on the backflow prevention valve 1 is in contact with the inner surface of the tube body T and the elasticity derived from the main body portion 1 a of the backflow prevention valve 1. Since the adapter sealing portion 2 is in airtight contact with the inner surface of the tube body T via the backflow prevention valve 1, the adapter sealing portion 2 is sealed, passes between the backflow prevention valve 1 and the adapter member 3, and is located downstream (outdoor side). ) From the air to the upstream side (indoor side).
In this way, on the upstream side (indoor side) and downstream side (outdoor side) of the backflow prevention valve 1 arranged in the pipe, the air flows from the upstream side (indoor side) to the downstream side (outdoor side) in the pipe. When it is not properly passing, it is partitioned by sealing the backflow prevention valve 1.

換気ファンFを作動させ、屋外に向けて気体の排気を行うと、配管の逆流防止弁1よりも下流側の気圧は上流側の気圧に比較して低くなり、逆流防止弁1の下流側の方が、上流側に比べて負圧(低圧)になる。このように、下流側に比べ上流側の圧力が増大すると、その圧力差により、逆流防止弁1の閉塞部1cは、弾性変形を生じて開口されて気圧の高い上流側(屋内側)から気圧の低い下流側(屋外側)に通気を生じる。換気ダクトを停止させるなどにより、逆流防止弁1の上流側(屋内側)と下流側(屋外側)との気圧差が解消されると、閉塞部1cは再び弾性変形し、閉塞部1cを閉塞して、通気が終了する。   When the ventilation fan F is operated and the gas is exhausted to the outside, the pressure on the downstream side of the backflow prevention valve 1 of the pipe becomes lower than the pressure on the upstream side. However, the negative pressure (low pressure) is higher than the upstream side. Thus, when the pressure on the upstream side increases compared to the downstream side, the closed portion 1c of the check valve 1 is elastically deformed due to the pressure difference, and is opened from the upstream side (indoor side) where the atmospheric pressure is high. Ventilation is generated on the low downstream side (outdoor side). When the pressure difference between the upstream side (indoor side) and the downstream side (outdoor side) of the backflow prevention valve 1 is resolved by stopping the ventilation duct, the closing portion 1c is elastically deformed again, and the closing portion 1c is closed. Then, the ventilation ends.

換気ダクトが動作していない状態(または換気ダクトにより生じる空気の流れが充分でない場合)において、上流側に比べ下流側の圧力が増大した場合、外周方向から圧力が加えられる事となり、閉塞部1cの対向する面同士がより強く当接するため、閉塞を維持する。
また、アダプター密閉部2、管体T内面、逆流防止弁1の間も密閉されて通気が生じないように構成されていることから、下流側(屋外側)から上流側(屋内側)に空気が逆流を生じることはない。
In the state where the ventilation duct is not operating (or when the air flow generated by the ventilation duct is not sufficient), when the pressure on the downstream side increases compared to the upstream side, the pressure is applied from the outer peripheral direction, and the blocking portion 1c. Since the opposing surfaces of the two come into contact with each other more strongly, the blockage is maintained.
In addition, since the adapter sealing portion 2, the inner surface of the tube T, and the backflow prevention valve 1 are also sealed so as not to generate ventilation, air flows from the downstream side (outdoor side) to the upstream side (indoor side). Does not cause backflow.

また、長期間の使用により、逆流防止弁1等が劣化する等して、メンテナンスが必要になった場合、蓋部5による取出口6aの閉塞を解除し、アダプター部材3と取出口付き継手管6との嵌合を解除し、アダプター部材3を取出口6aから取り出すことで、逆流防止弁1やアダプター部材3の清掃/交換を行うことができる。   In addition, when maintenance is required due to deterioration of the backflow prevention valve 1 or the like due to long-term use, the closure of the outlet 6a by the lid 5 is released, and the adapter member 3 and the joint pipe with the outlet are removed. The backflow prevention valve 1 and the adapter member 3 can be cleaned / replaced by releasing the fitting with 6 and taking out the adapter member 3 from the outlet 6a.

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。
例えば上記第一実施例、第二実施例においては、配管構造は排水機器の排出を行う排水配管に対応するものであるが、本発明は上記実施例に限定されるものではなく、給水管に対して行う配管構造に採用してももちろん構わない。
また、上記各実施例では、アダプター部材3を採用した場合、アダプター密閉部2を、逆流防止弁1の逆流防止弁密閉部1dの外側面に、凸条として設けているが、本発明は上記実施例に限定されるものではなく、逆流防止弁1上であれば、どの位置に構成しても構わないし、また、図10に示したように管体Tの内面の傾斜面や、図11に示したように管体Tの内面の段部に当接するように構成しても構わない。また、図10や図11の実施例のように、適切に当接するので有れば、必ずしも凸条を必要とするものでもない。
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 first embodiment and the second embodiment, the pipe structure corresponds to the drainage pipe for discharging the drainage equipment, but the present invention is not limited to the above embodiment, and the water supply pipe Of course, it does not matter if it is adopted for the piping structure.
Moreover, in each said Example, when the adapter member 3 is employ | adopted, although the adapter sealing part 2 is provided in the outer surface of the backflow prevention valve sealing part 1d of the backflow prevention valve 1 as a protruding item | line, this invention is described above. The present invention is not limited to the embodiment, and any position may be used as long as it is on the backflow prevention valve 1, and an inclined surface of the inner surface of the tube T as shown in FIG. As shown in Fig. 5, the tubular body T may be configured to abut on the step on the inner surface. Moreover, as long as it contacts appropriately like the Example of FIG.10 and FIG.11, it does not necessarily require a protruding item | line.

1 逆流防止弁 1a 本体部
1b 開口部 1c 閉塞部
1d 逆流防止弁密閉部 2 アダプター密閉部
3 アダプター部材 3a 取付部
3b 流路部 4 回転ロック式嵌合部
5 蓋部 6 取出口付き継手管
6a 取出口 7 流入口付き継手管
7a 流入口 8 管体部分
9 突起部 T 管体
S 洗面台 SB 洗面ボウル
S1 洗面台排水口 C キャビネット部
B 浴槽 B1 浴槽排水口
W 洗い場パン W1 洗い場パン排水口
F 換気ファン K つり下げ金具
O Oリング部材 P コの字の対向する面
DESCRIPTION OF SYMBOLS 1 Backflow prevention valve 1a Main-body part 1b Opening part 1c Closure part 1d Backflow prevention valve sealing part 2 Adapter sealing part 3 Adapter member 3a Mounting part 3b Flow path part 4 Rotation lock type fitting part 5 Lid part 6 Joint pipe 6a with an outlet Outlet 7 Joint pipe 7a Inlet 8 Inlet 8 Tube part 9 Protrusion T Tube S Wash basin SB Wash bowl S1 Wash basin drain C Cabinet part B Bath tub B1 Bath tub drain W Wash basin W1 Wash basin pan drain Ventilation fan K Suspension bracket O O-ring member P Opposite face of U-shape

Claims (8)

配管内に配置されて配管内の逆流を防止する逆流防止弁を備えた配管構造であって、
配管構造を成す管体Tの内部に配置される、弾性を有する素材から構成される逆流防止弁1を、
略筒形状の本体部1aと、
本体部1aの上流側の端部に備えた開口部1bと、
本体部1aの下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部1cと、
弾性を有する逆流防止弁1と一体に設けられ、逆流防止弁1の周縁に、周縁に沿って連続して設けられる、対向する面Pを備えてなり、該対向する面P同士の間に、配管構造に備えられる配管部材のリブ部分を有する取付部3aを密閉的に当接させ挟持することで、
逆流防止弁1の開口部1bから閉塞部1c以外の流路を、逆流防止弁1の上流側と下流側とに密閉的に区画する逆流防止弁密閉部1dと、
から構成してなることを特徴とする、逆流防止弁を備えた配管構造。
A piping structure provided with a backflow prevention valve arranged in the piping to prevent backflow in the piping,
A backflow prevention valve 1 made of an elastic material, which is arranged inside the pipe body T forming the piping structure,
A substantially cylindrical main body 1a;
An opening 1b provided at an upstream end of the main body 1a;
A closed portion 1c provided at the downstream end of the main body portion 1a and closed by contacting with an inclined surface so that the opposing surfaces gradually approach each other;
Provided integrally with the backflow prevention valve 1 having elasticity, and provided with opposing surfaces P provided continuously along the periphery at the periphery of the backflow prevention valve 1, and between the opposing surfaces P, By tightly abutting and clamping the mounting portion 3a having the rib portion of the piping member provided in the piping structure,
A backflow prevention valve sealing portion 1d that hermetically partitions a flow path other than the closing portion 1c from the opening 1b of the backflow prevention valve 1 into an upstream side and a downstream side of the backflow prevention valve 1,
A piping structure provided with a backflow prevention valve, characterized by comprising:
配管内に配置されて配管内の逆流を防止する逆流防止弁を備えた配管構造であって、
配管構造を成す管体Tの内部に配置される、弾性を有する素材から構成される逆流防止弁1を、
略筒形状の本体部1aと、
本体部1aの上流側の端部に備えた開口部1bと、
本体部1aの下流側の端部に備えた、対向する面同士が漸次近接するように設けた傾斜により当接することで閉塞される閉塞部1cと、
弾性を有する逆流防止弁1と一体に設けられるリブ部分であって、逆流防止弁1の周縁に、周縁に沿って連続して設けられ、配管構造に備えられる配管部材の対向する面Pを有する取付部3aに挟持されて、
逆流防止弁1と管体Tの内部との間を密閉的に当接させることで、
逆流防止弁1の開口部1bから閉塞部1c以外の流路を、逆流防止弁1の上流側と下流側とに密閉的に区画する逆流防止弁密閉部1dと、
から構成してなることを特徴とする、逆流防止弁を備えた配管構造。
A piping structure provided with a backflow prevention valve arranged in the piping to prevent backflow in the piping,
A backflow prevention valve 1 made of an elastic material, which is arranged inside the pipe body T forming the piping structure,
A substantially cylindrical main body 1a;
An opening 1b provided at an upstream end of the main body 1a;
A closed portion 1c provided at the downstream end of the main body portion 1a and closed by contacting with an inclined surface so that the opposing surfaces gradually approach each other;
It is a rib part provided integrally with the backflow prevention valve 1 which has elasticity, Comprising: It has the surface P which is provided in the periphery of the backflow prevention valve 1 continuously along the periphery, and opposes the piping member with which a piping structure is equipped. Sandwiched between the attachment portions 3a,
By sealingly contacting the backflow prevention valve 1 and the inside of the tube T,
A backflow prevention valve sealing portion 1d that hermetically partitions a flow path other than the closing portion 1c from the opening 1b of the backflow prevention valve 1 into an upstream side and a downstream side of the backflow prevention valve 1,
A piping structure provided with a backflow prevention valve, characterized by comprising:
上記逆流防止弁を備えた配管構造において、
配管構造を成す管体Tの内部にアダプター部材3を備え、
該アダプター部材3は、
管体Tの内側面に密閉的に当接するアダプター密閉部2と、
アダプター部材3内部に設けられ、アダプター密閉部2によって区画された上流側と下流側とを連通する、流体が通過する流路部3bと、
流路部3bの下流側に設けられた、逆流防止弁1の密閉部に当接して逆流防止弁1を取り付ける取付部3aと、
から構成されることを特徴とする、請求項1又は請求項2に記載の逆流防止弁を備えた配管構造。
In the piping structure provided with the backflow prevention valve,
The adapter member 3 is provided in the inside of the tubular body T that forms the piping structure,
The adapter member 3 is
An adapter sealing portion 2 that tightly contacts the inner surface of the tube T;
A flow path portion 3b that is provided inside the adapter member 3 and communicates between the upstream side and the downstream side partitioned by the adapter sealing portion 2, and through which the fluid passes;
A mounting portion 3a provided on the downstream side of the flow path portion 3b and attached to the sealing portion of the backflow prevention valve 1 to attach the backflow prevention valve 1;
The piping structure provided with the backflow prevention valve according to claim 1 or 2, characterized by comprising:
上記逆流防止弁を備えた配管構造において、
アダプター密閉部2を、
弾性を有する逆流防止弁1と一体に構成することを特徴とする、
請求項3に記載の逆流防止弁を備えた配管構造。
In the piping structure provided with the backflow prevention valve,
Adapter sealing part 2
It is constituted integrally with the backflow prevention valve 1 having elasticity,
A piping structure comprising the check valve according to claim 3.
上記逆流防止弁を備えた配管構造において、
逆流防止弁1の逆流防止弁密閉部1d、または取付部3aの一方の形状を、断面視略コの字形状とすると共に、
他方の形状を、コの字の開口部1b分に密閉的に嵌合するフランジ部と、から構成することを特徴とする、請求項3又は請求項4に記載の逆流防止弁を備えた配管構造。
In the piping structure provided with the backflow prevention valve,
While making one shape of the backflow prevention valve sealing part 1d of the backflow prevention valve 1 or the attachment part 3a into the cross-sectional view substantially U-shape,
The pipe having the backflow prevention valve according to claim 3 or 4, wherein the other shape is formed of a flange portion hermetically fitted to the U-shaped opening 1b. Construction.
上記逆流防止弁を備えた配管構造において、
逆流防止弁密閉部1dの断面視略コの字形状の外周部分に、
コの字の外周部分に周縁に沿って連続して設けた凸条を備え、
該凸条を管体Tの内側面に密閉的に当接させることで、アダプター密閉部2とすることを特徴とする、
請求項5に記載の逆流防止弁を備えた配管構造。
In the piping structure provided with the backflow prevention valve,
In the outer periphery of the reverse flow prevention valve sealing part 1d in a substantially U-shaped cross-sectional view,
Equipped with ridges continuously provided along the periphery on the outer periphery of the U-shape,
By making the ridges contact the inner surface of the tube T in a sealing manner, the adapter sealing portion 2 is provided.
A piping structure comprising the check valve according to claim 5.
上記逆流防止弁を備えた配管構造において、
配管構造を成す管体Tの側面に、逆流防止弁1を取り出す取出口6aを設けたことを特徴とする、
請求項1乃至請求項5のいずれか一つに記載の逆流防止弁を備えた配管構造。
In the piping structure provided with the backflow prevention valve,
An outlet 6a for taking out the backflow prevention valve 1 is provided on the side surface of the tubular body T forming the piping structure.
A piping structure comprising the backflow prevention valve according to any one of claims 1 to 5.
上記逆流防止弁を備えた配管構造において、
管体Tの側面に、逆流防止弁1を取り出す取出口6aを設けると共に、
アダプター部材3によって該取出口6aを閉塞するように構成したことを特徴とする、
請求項3乃至請求項6のいずれか一つに記載の逆流防止弁を備えた配管構造。
In the piping structure provided with the backflow prevention valve,
On the side surface of the tube body T, an outlet 6a for taking out the backflow prevention valve 1 is provided,
The adapter member 3 is configured to close the outlet 6a,
A piping structure comprising the check valve according to any one of claims 3 to 6.
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