JP2009127228A

JP2009127228A - Catch basin

Info

Publication number: JP2009127228A
Application number: JP2007301177A
Authority: JP
Inventors: Takahiro Kobayashi; 毅博小林; Kenichiro Imakubo; 謙一郎今久保
Original assignee: Kubota CI Co Ltd
Current assignee: Kubota CI Co Ltd
Priority date: 2007-11-21
Filing date: 2007-11-21
Publication date: 2009-06-11
Anticipated expiration: 2027-11-21
Also published as: JP5269397B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel catch basin and to provide a catch basin capable of maintaining ventilating function over a long period. <P>SOLUTION: The catch basin 10 includes a basin body 12 and a ventilation lid 14, and is provided in a draining path of a building. The basin body 12 includes an inflow port 20, an outflow port 22 and an inspection port 18. The ventilation lid 14 is connected to the inspection port 18. The ventilation lid 14 includes a ventilation valve 27. The ventilation valve 72 ordinarily maintains a closed state to prevent leak of drainage to the outside and leak of bad smell within the basin body 12. When a negative pressure is caused within the basin body 12, the ventilation valve 72 connects the inside of the basin body 12 with the outside air. The outside air is taken into the basin body 12, and the inside of the basin body 12 is maintained at the atmospheric pressure. The ventilation valve 72 can appropriately ventilate the basin body 12 with the outside air. The ventilation valve 72 is never broken even if the ventilation lid 14 receives an external shock since it is provided in the ventilation lid 14 and never exposed to the outside. Failures of the ventilation valve 72 can be thus prevented. Consequently, the ventilating function of the catch basin 10 can be maintained over a long period. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、排水桝に関し、特にたとえば、流入口、流出口および点検口を有する桝本体と、点検口に接続した通気蓋を備える排水桝に関する。 The present invention relates to a drainage basin, and more particularly, to a drainage basin including a casket body having an inlet, an outlet and an inspection port, and a vent lid connected to the inspection port.

従来のこの種の排水桝の一例が特許文献１に開示されている。特許文献１の技術は、排水桝を用いた屋内の床下配管とその施工方法であって、この排水桝は、桝本体と桝本体の点検口を密閉する桝蓋とを備えている。そして、桝蓋には、排水桝内に負圧が発生することを防止するための吸気弁が設けられる。
特開２００１−４０７４５号［Ｅ０３Ｆ３／０２］ An example of a conventional drainage basin of this type is disclosed in Patent Document 1. The technique of patent document 1 is an indoor underfloor pipe using a drainage basin and its construction method, and this drainage basin includes a casket body and a casket lid that seals the inspection port of the casket body. The lid is provided with an intake valve for preventing a negative pressure from being generated in the drain.
JP 2001-40745 [E03F 3/02]

特許文献１の技術では、吸気弁が桝蓋の上面から突出する形態で設けられ、物理的な衝撃に弱い部位であるにもかかわらず、吸気弁が外部に露出している。よって、点検のために桝蓋を外す際などに、外力を受けた吸気弁が破損してしまい、吸気弁が故障するという問題があった。また、吸気弁が外部に露出しているため、埃などが弁座と弁体との間に挟まり、弁座の開口を適切に閉じることができなくなるなどの故障が生じる恐れもある。ここで、吸気弁が故障すると、吸気機能に不具合が生じて桝内に空気を取り入れられなくなったり、逆止機能に不具合が生じて桝内の異臭が外部に漏れたりしてしまう。特許文献１の技術では、吸気弁が故障しやすいため、排水桝は、吸気機能や逆止機能などの通気機能を長期間にわたって維持することができない。 In the technique of Patent Document 1, the intake valve is provided so as to protrude from the upper surface of the lid, and the intake valve is exposed to the outside despite being a portion that is vulnerable to physical impact. Therefore, when removing the lid for inspection, there has been a problem that the intake valve that has received an external force is damaged and the intake valve fails. In addition, since the intake valve is exposed to the outside, dust or the like may be caught between the valve seat and the valve body, and a failure such as failure to properly close the opening of the valve seat may occur. Here, if the intake valve breaks down, a malfunction occurs in the intake function, and air cannot be taken into the bag, or a malfunction occurs in the check function and a strange odor in the bag leaks to the outside. In the technique of Patent Document 1, since the intake valve is likely to break down, the drainage basin cannot maintain a ventilation function such as an intake function or a check function over a long period of time.

それゆえに、この発明の主たる目的は、新規な、排水桝を提供することである。 Therefore, the main object of the present invention is to provide a novel drainage basin.

この発明の他の目的は、長期間にわたって通気機能を維持することができる、排水桝を提供することである。 Another object of the present invention is to provide a drainage basin capable of maintaining a ventilation function over a long period of time.

本発明は、上記の課題を解決するために、以下の構成を採用した。なお、括弧内の参照符号および補足説明などは、本発明の理解を助けるために後述する実施の形態との対応関係を示したものであって、本発明を何ら限定するものではない。 The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses, supplementary explanations, and the like indicate correspondence relationships with embodiments described later to help understanding of the present invention, and do not limit the present invention in any way.

第１の発明は、流入口、流出口および点検口を有する桝本体と、点検口に接続した通気蓋とを備える排水桝において、通気蓋は、常時は閉止状態を保持し、桝本体の内部が負圧になったときに外気と桝本体の内部とを連通する通気弁がその内部に設けられることを特徴とする。 A first aspect of the present invention is a drainage basin comprising a main body having an inflow port, an outflow port and an inspection port, and a vent lid connected to the inspection port. The vent cover is normally kept closed, and the interior of the main body of the main body A vent valve that communicates the outside air with the inside of the bag main body when the air pressure becomes negative is provided therein.

第１の発明では、排水桝（１０）は、たとえば建築物の床（１２０）下に設けられ、桝本体（１２）と通気蓋（１４）とを備える。桝本体は、流入口（２０）、流出口（２２）および点検口（１８）を有し、塩化ビニルなどの合成樹脂によって形成される。また、通気蓋は、桝本体の点検口に接続され、その内部に通気弁（７２）が設けられる。通気弁は、通常時には閉止状態を維持して、外部への排水の漏れ、および桝本体内部の悪臭の漏れを防止する。また、桝本体内で負圧が発生したときには、通気弁は、外気と桝本体内部とを連通する。そして、外部の空気が桝本体内に取り込まれ、桝本体内は大気圧に保たれる。このように、通気弁は、桝本体と外部とを適切に通気することができる。さらに、通気弁は、通気蓋の内部に設けられて外部に露出しないため、通気蓋が外部から衝撃を受けても破損することがない。これにより、通気弁の故障が防止される。 In the first invention, the drainage gutter (10) is provided, for example, under the floor (120) of a building, and includes a gutter body (12) and a vent lid (14). The bag main body has an inflow port (20), an outflow port (22), and an inspection port (18), and is formed of a synthetic resin such as vinyl chloride. The vent lid is connected to the inspection port of the bag main body, and a vent valve (72) is provided therein. The vent valve is normally closed to prevent leakage of drainage to the outside and leakage of bad odor inside the bag body. Further, when a negative pressure is generated in the bag main body, the ventilation valve communicates the outside air with the inside of the bag main body. And external air is taken in in the bag main body, and the inside of the bag main body is maintained at atmospheric pressure. In this way, the vent valve can properly vent the bag body and the outside. Further, since the vent valve is provided inside the vent lid and is not exposed to the outside, the vent lid is not damaged even if it receives an impact from the outside. Thereby, failure of the vent valve is prevented.

第１の発明によれば、排水桝の通気機能を長期間にわたって維持することができる。 According to 1st invention, the ventilation function of a drainage can be maintained over a long period of time.

第２の発明は、請求項１の発明に従属し、通気蓋には、外気と通気蓋の内部とを連通する空気流入口が形成される。 The second invention is dependent on the invention of the first aspect, and the vent lid is formed with an air inlet that communicates the outside air with the inside of the vent lid.

第２の発明では、通気蓋（１４）には、通気蓋の外部と内部とを連通するための空気流入口（３４）が形成される。そして、通気弁（７２）は、空気流入口を介して外部空気を取り入れる。これにより、たとえば、空気流入口を通気弁の容量に合わせて必要最低限の大きさに調整すれば、通気弁を外部に露出させている場合と比較して、通気弁が外気を吸引する際に同時吸引してしまう埃などの量を低減することができる。 In the second invention, an air inlet (34) for communicating the outside and the inside of the ventilation lid is formed in the ventilation lid (14). The ventilation valve (72) takes in external air through the air inlet. Thus, for example, if the air inlet is adjusted to the minimum necessary size in accordance with the capacity of the vent valve, the vent valve sucks outside air as compared with the case where the vent valve is exposed to the outside. It is possible to reduce the amount of dust and the like that are sucked simultaneously.

第３の発明は、請求項１または２の発明に従属し、通気蓋の内部には、空気流入口から外気が流入する空気流入室が形成され、通気蓋は、常時は閉止状態を保持し、桝本体の内部が負圧になったときに、空気流入口と通気弁とを連通する第２の通気弁をさらに含み、第２の通気弁は、空気流入室を介して空気流入口と連通することを特徴とする。 A third invention is dependent on the invention according to claim 1 or 2, and an air inflow chamber into which outside air flows from an air inflow port is formed in the inside of the vent lid, and the vent lid always maintains a closed state. And a second ventilation valve that communicates the air inlet and the ventilation valve when the inside of the bag main body becomes negative pressure, and the second ventilation valve is connected to the air inlet through the air inflow chamber. It is characterized by communication.

第３の発明では、通気蓋（１４）の内部には、空気流入口（３４）より外気が流入する空間である空気流入室（６２）が形成される。また、通気蓋は、第２の通気弁（８０）をさらに含む。通気弁（７２）および第２の通気弁は、通常時には閉止状態を維持して、外部への排水の漏れ、および桝本体（１２）内部の悪臭の漏れを防止する。そして、桝本体内で負圧が発生したときには、桝本体と連通する通気弁が開くと同時に、第２の通気弁が、空気流入室を介して、空気流入口と通気弁とを連通する。これにより、外部の空気が桝本体内に取り込まれ、桝本体内は大気圧に保たれる。 In the third invention, an air inflow chamber (62), which is a space into which outside air flows from the air inflow port (34), is formed inside the vent lid (14). The vent lid further includes a second vent valve (80). The ventilation valve (72) and the second ventilation valve are normally closed to prevent leakage of drainage to the outside and leakage of malodor inside the bag main body (12). When a negative pressure is generated in the bag main body, the vent valve communicating with the bag main body is opened, and at the same time, the second vent valve communicates the air inlet and the vent valve via the air inflow chamber. As a result, outside air is taken into the bag body, and the inside of the bag body is maintained at atmospheric pressure.

第３の発明によれば、通気弁および第２の通気弁のいずれか一方に不具合が生じた場合であっても、桝本体と外部とを適切に通気することができる。 According to the third aspect of the present invention, even if any one of the vent valve and the second vent valve is defective, the main body and the outside can be properly ventilated.

第４の発明は、請求項３の発明に従属し、通気蓋は、通気弁および第２の通気弁が設けられる弁支持体を含み、空気流入室は、弁支持体の内部に形成される。 A fourth invention is dependent on the invention of claim 3, the vent lid includes a valve support provided with a vent valve and a second vent valve, and the air inflow chamber is formed inside the valve support. .

第４の発明では、通気蓋（１４）は、通気弁（７２）および第２の通気弁（８０）が設けられる弁支持体（４２）を含む。弁支持体は、たとえば、通気蓋とは別体として形成され、通気蓋の内部に装着される。たとえば、弁支持体は、その外面が通気蓋の内面に沿う円筒形状の側壁部（４４）を備える。また、弁支持体の内部には、内壁部（５６）が形成される。空気流入室（６２）は、側壁部および内壁部によって囲まれた弁支持体の内部に形成される。すなわち、空気流入室および各通気弁を通気蓋の内部に設けるのに、弁支持体を通気蓋の内部に設けるだけでよい。 In the fourth invention, the vent lid (14) includes a valve support (42) provided with a vent valve (72) and a second vent valve (80). For example, the valve support is formed as a separate body from the vent lid, and is mounted inside the vent lid. For example, the valve support includes a cylindrical side wall (44) whose outer surface is along the inner surface of the vent lid. An inner wall (56) is formed inside the valve support. The air inflow chamber (62) is formed inside the valve support surrounded by the side wall and the inner wall. That is, in order to provide the air inflow chamber and each vent valve inside the vent lid, it is only necessary to provide the valve support inside the vent lid.

第４の発明によれば、少ない部品数によって、通気蓋を形成することができる。 According to the fourth invention, the ventilation lid can be formed with a small number of parts.

第５の発明は、請求項４の発明に従属し、通気蓋は、上端を封止した筒状に形成される筒状部を含み、弁支持体は、筒状部の内部に装着されて、通気弁と第２の通気弁とを連通する弁間連通室を形成し、さらに弁支持体には、空気流入室の上部および下部の位置に、筒状部の内面と前記弁支持体との間を密封するシール部材が設けられる。 A fifth invention is dependent on the invention of claim 4, the vent lid includes a cylindrical portion formed in a cylindrical shape with the upper end sealed, and the valve support is mounted inside the cylindrical portion. An inter-valve communication chamber that communicates the vent valve and the second vent valve, and further, the valve support is provided at the upper and lower positions of the air inflow chamber at the inner surface of the tubular portion and the valve support. A sealing member is provided for sealing between the two.

第５の発明では、通気蓋（１４）は、上端を封止した筒状に形成される筒状部（３０）を含む。そして、弁支持体（４２）を筒状部の内部に装着すると、筒状部の内面と弁支持体によって、通気弁（７２）と第２の通気弁（８０）とを連通する弁間連通室（６６）が形成される。また、弁支持体（４２）の側壁部（４４）の外面上部および外面下部には、第１凹部（４８）および第２凹部（５０）が形成される。第１凹部および第２凹部は、空気流入室（６２）の上部および下部に位置する。そして、第１凹部および第２凹部のそれぞれにシール部材（５２、５４）が装着されて、筒状部の内面と弁支持体の側壁部の外面との間の気密性および水密性が保たれる。したがって、空気流入口から流入する外気を、漏れることなく空気流入室に案内して、通気することができると共に、弁間連通室によって、通気弁と第２の通気弁とを気密的に連通することができる。 In 5th invention, a ventilation lid (14) contains the cylindrical part (30) formed in the cylinder shape which sealed the upper end. When the valve support (42) is attached to the inside of the cylindrical portion, the inter-valve communication that connects the vent valve (72) and the second vent valve (80) by the inner surface of the cylindrical portion and the valve support. A chamber (66) is formed. Moreover, the 1st recessed part (48) and the 2nd recessed part (50) are formed in the outer surface upper part and outer surface lower part of the side wall part (44) of a valve support body (42). The first recess and the second recess are located in the upper and lower portions of the air inflow chamber (62). And the sealing member (52, 54) is attached to each of the first recess and the second recess, and the airtightness and watertightness between the inner surface of the cylindrical portion and the outer surface of the side wall portion of the valve support body are maintained. It is. Therefore, the outside air flowing in from the air inlet can be guided to the air inflow chamber without leaking and vented, and the vent valve and the second vent valve are hermetically communicated by the inter-valve communication chamber. be able to.

この発明によれば、通気弁を通気蓋の内部に設けたため、排水桝の通気機能を長期間にわたって維持することができる。 According to this invention, since the vent valve is provided inside the vent lid, the vent function of the drainage can be maintained for a long period of time.

この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の実施例の詳細な説明から一層明らかとなろう。 The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

図１および図２を参照して、この発明の一実施例である排水桝１０は、たとえば床下１２０下などに設けられ、桝本体１２と通気蓋１４とを備える。 Referring to FIGS. 1 and 2, a drainage basin 10 according to an embodiment of the present invention is provided, for example, under a floor 120 and includes a casket body 12 and a vent lid 14.

桝本体１２は、塩化ビニルなどの合成樹脂からなり、トイレや風呂などの住設機器から排出された生活排水を流す第１排水管１２２と、生活排水を外部に排出する第２排水管１２４とを繋ぎ、第１排水管１２２から流入した排水を、第２排水管１２４へと排出する。また、通気蓋１４は、桝本体１２の点検口１８に着脱自在に接続される。 The main body 12 is made of a synthetic resin such as vinyl chloride, and includes a first drain pipe 122 that flows domestic wastewater discharged from residential equipment such as a toilet and a bath, and a second drain pipe 124 that discharges domestic wastewater to the outside. , And the waste water that flows in from the first drain pipe 122 is discharged to the second drain pipe 124. The vent lid 14 is detachably connected to the inspection port 18 of the bag main body 12.

図３に示すように、桝本体１２は、射出成形などによって形成され、円筒形状の側壁部１６を含む。側壁部１６の上端は開口しており、点検口１８が形成される。点検口１８の呼び径は、たとえば１５０ｍｍである。点検口１８には、後述する通気蓋１４が接続される。 As shown in FIG. 3, the bag main body 12 is formed by injection molding or the like and includes a cylindrical side wall portion 16. The upper end of the side wall portion 16 is open, and an inspection port 18 is formed. The nominal diameter of the inspection port 18 is, for example, 150 mm. A vent lid 14 described later is connected to the inspection port 18.

また、側壁部１６の側面には、流入口２０および流出口２２が形成される。流入口２０および流出口２２のそれぞれは、対向する位置に形成される。流入口２０は、受口構造を有する円筒形状に形成され、その呼び径は、たとえば７５ｍｍである。流入口２０の内周面には、シール溝２４が形成され、このシール溝２４にシール部材２６（たとえばＯリング）が装着されている。たとえば、流入口２０に第１排水管１２２が挿入されて、桝本体１２と第１排水管１２２とはゴム輪接合される。また、流出口２２は、差口構造を有する円筒形状に形成され、その呼び径は、たとえば７５ｍｍである。たとえば、流出口２２はシール材等が内面に設けられた第２排水管１２４に挿入されて、桝本体１２と第２排水管１２４とはゴム輪接合される。 In addition, an inflow port 20 and an outflow port 22 are formed on the side surface of the side wall portion 16. Each of the inflow port 20 and the outflow port 22 is formed in the position which opposes. The inflow port 20 is formed in a cylindrical shape having a receiving structure, and its nominal diameter is, for example, 75 mm. A seal groove 24 is formed on the inner peripheral surface of the inflow port 20, and a seal member 26 (for example, an O-ring) is attached to the seal groove 24. For example, the first drain pipe 122 is inserted into the inflow port 20, and the rod main body 12 and the first drain pipe 122 are joined by a rubber ring. Moreover, the outflow port 22 is formed in the cylindrical shape which has an outlet structure, The nominal diameter is 75 mm, for example. For example, the outflow port 22 is inserted into a second drainage pipe 124 provided with a sealing material or the like on the inner surface, and the bag body 12 and the second drainage pipe 124 are joined by a rubber ring.

また、側壁部１６の下端には、底部２８が形成される。底部２８は、側壁部１６に形成される流入口２０の下端から流出口２２側に向けて滑らかに湾曲して流出口２２の下端と連なっている。底部２８は、流入口２０から流入する排水を案内して、排水の流れ方向を流出口２２の方向、すなわち斜め下向きにスムーズに変化させる案内機能を有し、流入口２０への排水の逆流を防止する。 A bottom portion 28 is formed at the lower end of the side wall portion 16. The bottom portion 28 is smoothly curved from the lower end of the inflow port 20 formed in the side wall portion 16 toward the outflow port 22 side, and is continuous with the lower end of the outflow port 22. The bottom portion 28 has a guide function for guiding the wastewater flowing in from the inlet 20 and smoothly changing the flow direction of the wastewater in the direction of the outlet 22, that is, obliquely downward, and the reverse flow of the wastewater to the inlet 20 is provided. To prevent.

図４および図５に示すように、通気蓋１４は、射出成形などによって形成され、たとえば、上端を封止した円筒状の筒状部３０、および筒状部３０の外面下部に形成される鍔部３２を備える。通気蓋１４を桝本体１２の点検口１８に装着したときには、鍔部３２の下面周縁部が桝本体１２の側壁部１６の上端に当接する。鍔部３２の下面から筒状部３０の上面までの高さは、たとえば４０ｍｍである。 As shown in FIGS. 4 and 5, the ventilation lid 14 is formed by injection molding or the like. For example, the cylindrical lid 30 is sealed at the upper end, and is formed at the lower part of the outer surface of the tubular portion 30. The unit 32 is provided. When the ventilation lid 14 is attached to the inspection port 18 of the heel body 12, the lower peripheral edge portion of the heel portion 32 abuts on the upper end of the side wall portion 16 of the heel body 12. The height from the lower surface of the collar part 32 to the upper surface of the cylindrical part 30 is 40 mm, for example.

筒状部３０には、鍔部３２の上面に沿うように、外部と後述する弁支持体４２の空気流入室６２とを連通するための空気流入口３４が形成される。また、筒状部３０の内面下部には、ネジ溝３６が形成される。さらに、鍔部３２の下面には、円筒形状の嵌合部３８が形成される。嵌合部３８の外面は、桝本体１２の側壁部１６の内面に沿い（図１参照）、たとえば、嵌合部３８の外面に装着されるシール部材４０（たとえばＯリング）によって、桝本体１２の側壁部１６内面と、嵌合部３８外面との間の気密性および水密性が確保される。 An air inflow port 34 is formed in the tubular portion 30 so as to communicate the outside and an air inflow chamber 62 of the valve support 42 described later along the upper surface of the flange portion 32. In addition, a screw groove 36 is formed in the lower portion of the inner surface of the cylindrical portion 30. Further, a cylindrical fitting portion 38 is formed on the lower surface of the collar portion 32. The outer surface of the fitting portion 38 extends along the inner surface of the side wall portion 16 of the heel body 12 (see FIG. 1), and is, for example, a seal member 40 (for example, an O-ring) attached to the outer surface of the fitting portion 38. Airtightness and watertightness between the inner surface of the side wall portion 16 and the outer surface of the fitting portion 38 are ensured.

また、上述したように、通気蓋１４の内部には、通気蓋１４とは別体として形成される弁支持体４２を含み、弁支持体４２には、通気弁７２が設けられる。そして、弁支持体４２は、通気蓋１４の筒状部３０の内部に取り付けられる。 Further, as described above, the vent cover 14 includes the valve support 42 formed separately from the vent cover 14, and the valve support 42 is provided with the vent valve 72. The valve support 42 is attached to the inside of the tubular portion 30 of the ventilation lid 14.

具体的には、図６および図７に示すように、弁支持体４２は、その外面が筒状部３０の内面に沿う円筒形状の側壁部４４を備える（なお、図６では、通気弁７２および第２の通気弁８０を省略して示す）側壁部４４の外面下部には、筒状部３０のねじ溝３６に対応するねじ山４６が形成されており、ねじ溝３６とねじ山４６との螺合によって、通気蓋１４に弁支持体４２が着脱可能に取り付けられる。 Specifically, as shown in FIGS. 6 and 7, the valve support 42 includes a cylindrical side wall portion 44 whose outer surface is along the inner surface of the cylindrical portion 30 (in FIG. 6, the vent valve 72 is provided). A thread 46 corresponding to the thread groove 36 of the tubular portion 30 is formed on the lower portion of the outer surface of the side wall portion 44 (illustrated without the second vent valve 80), and the thread groove 36, the thread 46, Thus, the valve support 42 is detachably attached to the vent lid 14.

また、弁支持体４２の側壁部４４の外面上部および外面下部には、第１凹部４８および第２凹部５０が形成される。第１凹部４８および第２凹部５０は、後述する空気流入室６２の上部および下部に位置する。第１凹部４８および第２凹部５０のそれぞれには、シール部材（たとえばＯリング）５２および５４が装着されており、筒状部３０の内面と弁支持体４２の側壁部４４の外面との間の気密性および水密性が保たれている。なお、通気蓋１４に弁支持体４２を取り付ける場合には、ねじ結合以外にも適宜な方法を用いてよく、たとえば、バヨネット結合（差し込んで回転させることによって固定する方法）を利用することもできる。 In addition, a first recess 48 and a second recess 50 are formed in the upper and lower outer surfaces of the side wall 44 of the valve support 42. The first recess 48 and the second recess 50 are located at the upper and lower portions of an air inflow chamber 62 described later. Sealing members (for example, O-rings) 52 and 54 are attached to the first recess 48 and the second recess 50, respectively, and between the inner surface of the tubular portion 30 and the outer surface of the side wall portion 44 of the valve support 42. Airtightness and watertightness are maintained. In addition, when attaching the valve support body 42 to the vent lid 14, an appropriate method other than the screw connection may be used. For example, a bayonet connection (a method of fixing by inserting and rotating) may be used. .

また、弁支持体４２の側壁部４４には、通気蓋１４の筒状部３０の空気流入口３４に対応する位置に、後述する空気流入室６２と空気流入口３４とを連通する空気連通孔６８が形成されており、空気流入室６２は、外部と連通する。 Further, the side wall portion 44 of the valve support 42 has an air communication hole that communicates an air inflow chamber 62 and an air inflow port 34 described later at a position corresponding to the air inflow port 34 of the tubular portion 30 of the vent lid 14. 68 is formed, and the air inflow chamber 62 communicates with the outside.

弁支持体４２の内部には、内壁部５６が形成される。内壁部５６は、長方形の板状に垂直方向に立ち上がる第１内壁部５８、および円板状の第２内壁部６０によって形成され、通気蓋１４の筒状部３０の内部を、空気流入室６２、桝内連通室６４および弁間連通室６６の３つの弁室に分割する。 An inner wall portion 56 is formed inside the valve support 42. The inner wall portion 56 is formed by a first inner wall portion 58 that rises vertically in the shape of a rectangular plate and a second inner wall portion 60 that is disk-shaped, and the inside of the tubular portion 30 of the vent lid 14 is passed through the air inflow chamber 62. , And is divided into three valve chambers, a communication chamber 64 in the tub and a communication chamber 66 between the valves.

すなわち、弁間連通室６６は、筒状部３０の内面と弁支持体４２の第２内壁部６０とによって形成され、後述する第１連通孔７０と第２連通孔７８とが閉止状態のときには、閉空間となる。また、桝内連通室６４は、下部が開口して、桝本体１２の内部と連通する。 That is, the inter-valve communication chamber 66 is formed by the inner surface of the cylindrical portion 30 and the second inner wall portion 60 of the valve support 42, and when a first communication hole 70 and a second communication hole 78, which will be described later, are closed. It becomes a closed space. Moreover, the lower part of the inner communication chamber 64 is open and communicates with the interior of the main body 12.

ここで、第２内壁部６０の桝内連通室６４と弁間連通室６６とを分割する部位には、桝内連通室６４と弁間連通室６６とを連通する第１連通孔７０が形成され、通気弁７２が設けられる。また、第２内壁部６０の弁間連通室６６と空気流入室６２とを分割する部位には、弁間連通室６６と空気流入室６２とを連通する第２連通孔７８が形成される。そして、この第２連通孔７８には、第２の通気弁８０が設けられる。 Here, a first communication hole 70 that connects the intra-chamber communication chamber 64 and the inter-valve communication chamber 66 is formed in a portion of the second inner wall portion 60 that divides the intra-chamber communication chamber 64 and the inter-valve communication chamber 66. A vent valve 72 is provided. In addition, a second communication hole 78 that connects the inter-valve communication chamber 66 and the air inflow chamber 62 is formed in a portion of the second inner wall portion 60 that divides the inter-valve communication chamber 66 and the air inflow chamber 62. A second ventilation valve 80 is provided in the second communication hole 78.

通気弁７２は、円柱状の摺動軸７４、摺動軸７４の下端に形成されてその上面に合成ゴム等のシール部材が設けられる円盤状の弁体７６を備える。通常時、通気弁７２は、弾性力などによって第１連通孔７０を閉止状態にする。 The vent valve 72 includes a cylindrical slide shaft 74 and a disc-shaped valve body 76 formed at the lower end of the slide shaft 74 and provided with a sealing member such as synthetic rubber on the upper surface thereof. Normally, the vent valve 72 closes the first communication hole 70 by an elastic force or the like.

第２の通気弁８０は、円柱状の摺動軸８２、および摺動軸８２の上端に形成されてその下面に合成ゴム等のシール部材が設けられる円盤状の弁体８４等を備える。通常時、第２の通気弁８０は、自重によって第２連通孔７８を閉止状態にする。 The second vent valve 80 includes a cylindrical slide shaft 82 and a disc-shaped valve body 84 formed on the upper end of the slide shaft 82 and provided with a sealing member such as synthetic rubber on the lower surface thereof. At normal times, the second ventilation valve 80 closes the second communication hole 78 by its own weight.

第１連通孔７０および第２連通孔７８は、通気弁７２および第２の通気弁８０によって閉止状態にあり、これらのダブルシールによって、外部への排水の漏れ、および桝本体１２内の悪臭の漏れを確実に防止する。一方、桝本体１２内で負圧が発生したときには、通気弁７２が下降し、桝内連通室６４と弁間連通室６６とが連通する。そして、これとほぼ同時に第２の通気弁８０が上昇し、弁間連通室６６と外部に連通する空気流入室６２とが連通する。これによって、外部の空気が桝本体１２内に取り込まれ、桝本体１２内は大気圧に保たれる。このように、弁支持体４２に通気弁７２および第２の通気弁８０の２つの弁を設けたため、通気弁７２および第２の通気弁８０のいずれか一方に不具合が生じた場合であっても、桝本体１２と外部とを適切に通気することができる。 The first communication hole 70 and the second communication hole 78 are closed by the ventilation valve 72 and the second ventilation valve 80, and these double seals prevent leakage of drainage to the outside and offensive odor in the bag body 12. Make sure to prevent leaks. On the other hand, when a negative pressure is generated in the bag main body 12, the vent valve 72 is lowered, and the bag communication chamber 64 and the valve communication chamber 66 communicate with each other. At substantially the same time, the second vent valve 80 rises, and the inter-valve communication chamber 66 and the air inflow chamber 62 communicating with the outside communicate with each other. As a result, outside air is taken into the bag main body 12, and the inside of the bag main body 12 is maintained at atmospheric pressure. As described above, since the valve support 42 is provided with the two valves, the vent valve 72 and the second vent valve 80, a problem occurs in either the vent valve 72 or the second vent valve 80. In addition, the bag main body 12 and the outside can be appropriately ventilated.

排水桝１０では、桝本体１２に接続される通気蓋１４の内部に通気弁７２、８０が設けられる。これにより、通常時には、通気弁７２、８０が連通孔７０、７８を閉止するため、外部への排水の漏れ、および桝本体１２内の悪臭の漏れを防止することができる。また、桝本体１２で負圧が発生したときには、通気弁７２，８０が作動して、桝内連通室６４と空気流入室６２とを連通する。そして、外部の空気が桝本体１２内に取り込まれ、桝本体１２内は大気圧に保たれる。このように、通気弁７２、８０は、桝本体１２と外部とを適切に通気することができる。さらに、通気弁７２、８０は、筒状部３０の内部に設けられて外部に露出しないため、通気蓋１４が外部から衝撃を受けても破損しない。これにより、通気弁７２、８０の故障が防止される。したがって、排水桝１０の通気機能を長期間にわたって維持することができる。 In the drainage basin 10, ventilation valves 72 and 80 are provided inside the ventilation lid 14 connected to the basin body 12. Thereby, since the vent valves 72 and 80 normally close the communication holes 70 and 78, leakage of drainage to the outside and leakage of malodor in the bag main body 12 can be prevented. Further, when a negative pressure is generated in the rod main body 12, the vent valves 72 and 80 are operated to communicate the rod communication chamber 64 and the air inflow chamber 62. And external air is taken in in the coffin main body 12, and the inside of the coffin main body 12 is maintained at atmospheric pressure. Thus, the vent valves 72 and 80 can properly vent the bag body 12 and the outside. Further, since the vent valves 72 and 80 are provided inside the cylindrical portion 30 and are not exposed to the outside, the vent lid 14 is not damaged even if it receives an impact from the outside. Thereby, failure of the vent valves 72 and 80 is prevented. Therefore, the ventilation function of the drainage basin 10 can be maintained over a long period of time.

また、通気弁７２、８０は、通気蓋１４の筒状部３０に形成される空気流入口３４を介して、外部空気を取り入れる。よって、たとえば、空気流入口３４の大きさを通気弁７２、８０の容量に合わせて必要最低限に調整すれば、通気弁を外部に露出させている場合と比較して、通気弁７２、８０が外部空気と同時に吸引してしまう埃などの量を低減することができる。 The vent valves 72 and 80 take in external air through the air inlet 34 formed in the cylindrical portion 30 of the vent lid 14. Therefore, for example, if the size of the air inlet 34 is adjusted to the minimum necessary in accordance with the capacity of the vent valves 72, 80, the vent valves 72, 80 are compared with the case where the vent valves are exposed to the outside. Can reduce the amount of dust or the like that is sucked simultaneously with the external air.

さらに、弁支持体４２の側壁部４４の外面かつ空気流入室６２の上部および下部の位置に、第１凹部４８および第２凹部５０のそれぞれを形成し、シール部材５２、５４を装着した。これにより、筒状部３０の内面と弁支持体４２の側壁部４４の外面との間の気密性および水密性が保たれる。したがって、空気流入口３４から流入する外気を、漏れることなく空気流入室に案内して、通気することができる。さらに、筒状部３０の内面と弁支持体４２によって気密性が保たれた空気流入室６２が形成される。 Further, the first recess 48 and the second recess 50 were formed on the outer surface of the side wall 44 of the valve support 42 and the upper and lower positions of the air inflow chamber 62, and the seal members 52 and 54 were mounted. Thereby, the airtightness and watertightness between the inner surface of the cylindrical part 30 and the outer surface of the side wall part 44 of the valve support body 42 are maintained. Therefore, the outside air flowing in from the air inlet 34 can be guided and ventilated to the air inflow chamber without leaking. Further, an air inflow chamber 62 that is kept airtight is formed by the inner surface of the cylindrical portion 30 and the valve support 42.

また、通気蓋１４の筒状部３０の内側には、空気流入室６２が形成され各通気弁７２、８０が設けられる弁支持体４２が着脱可能に取り付けられる。これにより、空気流入室６２および各通気弁７２、８０を通気蓋１４の内部に設けるのに、弁支持体４２を通気蓋１４の内部に取り付けるだけでよい。したがって、少ない部品数によって、通気蓋１４を形成することができる。 In addition, a valve support 42 in which an air inflow chamber 62 is formed and the respective vent valves 72 and 80 are provided is detachably attached to the inside of the tubular portion 30 of the vent lid 14. Thus, the valve support 42 need only be attached to the inside of the vent lid 14 in order to provide the air inflow chamber 62 and the vent valves 72 and 80 inside the vent lid 14. Therefore, the ventilation lid 14 can be formed with a small number of parts.

また、筒状部３０の内面と弁支持体４２によって弁間連通室６６を形成し、弁支持体４２の第１凹部４８および第２凹部５０のそれぞれにシール部材５２、５４を装着した。これにより、筒状部３０の内面と弁支持体４２の側壁部４４の外面との間の気密性および水密性が保たれる。したがって、通気弁７２と第２の通気弁８０とを気密的に連通することができる。 Further, an inter-valve communication chamber 66 was formed by the inner surface of the cylindrical portion 30 and the valve support 42, and seal members 52 and 54 were mounted in the first recess 48 and the second recess 50 of the valve support 42, respectively. Thereby, the airtightness and watertightness between the inner surface of the cylindrical part 30 and the outer surface of the side wall part 44 of the valve support body 42 are maintained. Therefore, the vent valve 72 and the second vent valve 80 can be communicated in an airtight manner.

また、通気弁７２、８０が桝本体１２と外部とを適切に通気して、桝本体１２内の負圧を解消するため、排水を円滑に流すことができる。よって、排水量を増加させるために桝本体１２の管径を大きくとる必要がなく、桝本体１２を小型化することができる。 In addition, since the vent valves 72 and 80 properly vent the bag main body 12 and the outside to eliminate the negative pressure in the bag main body 12, the drainage can flow smoothly. Therefore, it is not necessary to increase the pipe diameter of the rod main body 12 in order to increase the amount of drainage, and the rod main body 12 can be downsized.

図８に示すこの発明の他の一実施例である排水桝１０は、桝本体１２が、複数の流入口２０と１つの流出口２２とを有する、いわゆる合流桝である。以下、図１に示す排水桝１０と同様である部分に関しては、詳細な説明は省略する。 A drainage basin 10 according to another embodiment of the present invention shown in FIG. 8 is a so-called merging basin in which the main body 12 has a plurality of inlets 20 and one outlet 22. Hereinafter, detailed description of the same parts as the drainage basin 10 shown in FIG. 1 will be omitted.

図８に示すように、桝本体１２は、その内部に仕切体８６を備え、たとえば、その側方から流入した排水を下方へ排出する、いわゆるドロップ桝である。具体的には、図９に示すように、桝本体１２は、射出成形などによって形成され、円筒形状の側壁部８８を含む。側壁部８８の内径は、たとえば１５５ｍｍである。側壁部８８の上端は開口しており、点検口１８が形成される。点検口１８の呼び径は、たとえば１５０ｍｍである。点検口１８には、通気蓋１４が接続される。 As shown in FIG. 8, the bag main body 12 is a so-called drop bottle that includes a partition 86 inside and discharges the waste water flowing in from the side thereof downward. Specifically, as shown in FIG. 9, the bag main body 12 is formed by injection molding or the like, and includes a cylindrical side wall portion 88. The inner diameter of the side wall portion 88 is, for example, 155 mm. The upper end of the side wall part 88 is opened, and the inspection port 18 is formed. The nominal diameter of the inspection port 18 is, for example, 150 mm. A vent lid 14 is connected to the inspection port 18.

また、側壁部８８は、一方が内側に向かって凹んでおり、そこに段差部９０が形成される。段差部９０の両側端上部のそれぞれは段差状になっており、そこに第１支持部９２が形成され、その第１支持部９２の水平面同士を結ぶように、円弧状に突出する第２支持部９４が形成される。 Moreover, one side of the side wall part 88 is dented inward, and the step part 90 is formed there. Each of the upper portions on both side ends of the stepped portion 90 has a stepped shape, and a first support portion 92 is formed there, and a second support projecting in an arc shape so as to connect the horizontal surfaces of the first support portion 92 to each other. A portion 94 is formed.

側壁部８８の段差部９０を除く３方側のそれぞれには、外方に向かって突出するように、複数（この実施例では３つ）の流入口２０が設けられる。流入口２０は、受口構造を有する円筒形状に形成され、その内径は、たとえば９０ｍｍである。流入口２０は、接着接合などによって第１排水管１２２と接続される。 A plurality of (three in this embodiment) inflow ports 20 are provided on each of the three sides of the side wall portion 88 excluding the stepped portion 90 so as to protrude outward. The inflow port 20 is formed in a cylindrical shape having a receiving structure, and an inner diameter thereof is, for example, 90 mm. The inflow port 20 is connected to the first drain pipe 122 by adhesive bonding or the like.

また、側壁部８８の下部には、テーパ状の底壁部９６が形成され、底壁部９６の上面、すなわち桝本体１２の底部は中心方向に向かって下り勾配となる。この底壁部９６の中心部に、円筒形状の流出口２２が下側に延びて形成される。流出口２２は、差口構造を有する円筒形状に形成され、その外径は、たとえば１０６ｍｍである。流出口２２は、接着接合などによって第２排水管１２４と接続される。 Further, a tapered bottom wall portion 96 is formed at the lower portion of the side wall portion 88, and the upper surface of the bottom wall portion 96, that is, the bottom portion of the eaves body 12 is inclined downward toward the center direction. A cylindrical outlet 22 is formed at the center of the bottom wall 96 so as to extend downward. Outflow port 22 is formed in a cylindrical shape having a differential structure, and its outer diameter is, for example, 106 mm. The outflow port 22 is connected to the second drain pipe 124 by adhesive bonding or the like.

また、図１０および図１１に示すように、桝本体１２の内部には、仕切体８６が着脱自在に設けられる。仕切体８６は、射出成形などによって形成され、当接板９８および仕切板１００を備える。当接板９８は、桝本体１２の段差部９０と対向するように形成される板状体であって、その両側部の上部は、桝本体１２の段差部９０の両側端と沿う。また、当接板９８の上端には、外方に向かって突出する第１当接部１０２が形成される。この第１当接部１０２は、段差状の第１支持部９２に沿う形状に形成され、桝本体１２に仕切体８６を取り付けたときに、第１当接部１０２と第１支持部９２とが当接する。 Further, as shown in FIGS. 10 and 11, a partition body 86 is detachably provided inside the bag main body 12. The partition 86 is formed by injection molding or the like, and includes a contact plate 98 and a partition plate 100. The contact plate 98 is a plate-like body formed so as to face the stepped portion 90 of the heel body 12, and upper portions of both side portions thereof are along both side ends of the stepped portion 90 of the heel body 12. A first contact portion 102 that protrudes outward is formed at the upper end of the contact plate 98. The first contact portion 102 is formed in a shape along the step-shaped first support portion 92, and when the partition body 86 is attached to the main body 12, the first contact portion 102, the first support portion 92, Abut.

仕切板１００は、各流入口２０の間を区画するものであり、各流入口２０に対向する位置のそれぞれに形成される。具体的には、仕切板１００は、流入口２０に対向する主面１００ａを有し、主面１００ａの下端中央から上方および両側方に向かうに伴い、流出口２２に向かって湾曲する板状体に形成される。つまり、仕切板１００は、流入口２０の桝本体１２中心側の開口部１０４を庇状に覆い、仕切板１００の側面上部１０６は、開口部１０４の上側半周に亘って、桝本体１２の側壁部８８の内面に沿う。また、仕切板１００の側面下部１０８は、下端に向かうに伴い内側に向かって放物線を描くように湾曲する。つまり、仕切板１００の側面下部１０８と桝本体１２の側壁部８８の内面とは離れており、その間には空間が形成される。この空間は、仕切板１００によって区画される排水の通路同士を、桝本体１２の周方向に連通する。 The partition plate 100 divides between the inflow ports 20, and is formed at each position facing the inflow ports 20. Specifically, the partition plate 100 has a main surface 100a that faces the inflow port 20, and is a plate-like body that curves toward the outflow port 22 from the center of the lower end of the main surface 100a toward the upper side and both sides. Formed. That is, the partition plate 100 covers the opening 104 of the inflow port 20 on the center side of the cocoon body 12 in a bowl shape, and the side surface upper portion 106 of the partition plate 100 extends over the upper half circumference of the opening 104. Along the inner surface of the portion 88. Further, the lower side surface 108 of the partition plate 100 is curved so as to draw a parabola inward as it goes toward the lower end. That is, the side surface lower portion 108 of the partition plate 100 is separated from the inner surface of the side wall portion 88 of the bag main body 12, and a space is formed therebetween. This space communicates the drainage passages partitioned by the partition plate 100 in the circumferential direction of the main body 12.

また、仕切体８６は、その外面が仕切板１００の側面上部と同一面となる壁部１１０を備える。この壁部１１０は、当接板９８と一体となって略円筒形に形成され、壁部１１０の外面は、側壁部８８の内面に沿う。壁部１１０の上端には、その全周に亘って、第１当接部１０２と一体になって外方に向かって突出する第２当接部１１２が形成される。桝本体１２に仕切体８６を取り付けたときには、第２当接部１１２と第２支持部９４とが当接し、第１当接部１０２および第２当接部１１２の上面は、段差部９０の上面と同一面を形成する。 Further, the partition body 86 includes a wall portion 110 whose outer surface is flush with the upper side surface of the partition plate 100. The wall 110 is formed in a substantially cylindrical shape integrally with the contact plate 98, and the outer surface of the wall 110 is along the inner surface of the side wall 88. A second abutting portion 112 is formed at the upper end of the wall portion 110 so as to be integral with the first abutting portion 102 and project outwardly over the entire circumference. When the partition 86 is attached to the main body 12, the second contact portion 112 and the second support portion 94 are in contact with each other, and the upper surfaces of the first contact portion 102 and the second contact portion 112 are Form the same surface as the top surface.

また、通気蓋１４を桝本体１２の点検口１８に取り付けた際は、通気蓋１４の嵌合部３８の下端と、第１当接部１０２、第２当接部１１０および段差部９０の上面とが当接する。したがって、仕切体８６は、桝本体１２と通気蓋１４とに挟まれる状態となり、しっかりと固定されるので、排水が仕切体８６にぶつかる等しても、仕切体８６はがたつかない。 When the ventilation lid 14 is attached to the inspection port 18 of the bag main body 12, the lower end of the fitting portion 38 of the ventilation lid 14 and the upper surfaces of the first contact portion 102, the second contact portion 110, and the step portion 90. And abut. Therefore, since the partition body 86 is sandwiched between the bag main body 12 and the ventilation lid 14 and is firmly fixed, the partition body 86 does not rattle even if drainage collides with the partition body 86.

このように、合流桝である桝本体１２の点検口１８に通気蓋１４を接続した。これにより、流入口２０を複数有することによって、流入口２０が１つの桝本体１２と比較して負圧が発生しやすい桝本体１２でも、外気と桝本体１２内部とを適切に通気することができる。 In this way, the vent lid 14 was connected to the inspection port 18 of the main body 12 that is a joining rod. Thereby, by having a plurality of inflow ports 20, even if the inflow port 20 is more likely to generate a negative pressure than a single reed body 12, the outside air and the inside of the reed body 12 can be properly ventilated. it can.

なお、上述の各実施例ではいずれも、通気蓋１４の内部には、通気弁７２と第２の通気弁８０とが形成されたが、これに限定されない。たとえば、通気蓋１４の内部にひとつの通気弁のみを形成してもよく、別の形状からなる通気弁を適宜採用してもよい。 In each of the above embodiments, the vent valve 72 and the second vent valve 80 are formed inside the vent lid 14, but the present invention is not limited to this. For example, only one vent valve may be formed inside the vent lid 14, or a vent valve having a different shape may be appropriately employed.

また、上述の各実施例ではいずれも、桝本体１２および通気蓋１４をそれぞれ別体として着脱可能に形成したが、これに限定されず、桝本体１２と通気蓋１４とを一体として形成してもよい。 In each of the above-described embodiments, the heel body 12 and the ventilation lid 14 are detachably formed as separate bodies. However, the present invention is not limited to this, and the heel body 12 and the ventilation lid 14 are integrally formed. Also good.

さらに、図１２に示すように、別体に形成した桝本体１２と通気蓋１４との固定を、桝本体１２に形成する係合部１１４および通気蓋１４に形成する受部１１６によって、補強することもできる。たとえば、桝本体１２の側壁部１６の上端には、外方向に向かって突出する係合部１１４が形成される。そして、通気蓋１４の鍔部３２には、鍔部３２の端部と一体となって「コ」字状の断面形状を有する受部１１６が形成される。桝本体１２の上端に蓋１４の嵌合部３８を挿入し、受部１１６の側方から桝本体１２の係合部１１４を回し込むように、受部１１６に係合部１１４を挿入することによって、桝本体１２に通気蓋１４が取り付けられる。これにより、桝本体１２内部に正圧が発生した場合にも、通気蓋１４は桝本体１２から外れない。なお、係合部１１４を形成する桝本体１２は、合流桝でもよい。 Further, as shown in FIG. 12, the fixation between the heel body 12 formed separately and the ventilation lid 14 is reinforced by the engaging portion 114 formed on the heel body 12 and the receiving portion 116 formed on the ventilation lid 14. You can also. For example, an engaging portion 114 that protrudes outward is formed at the upper end of the side wall portion 16 of the bag main body 12. Then, a receiving portion 116 having a “U” -shaped cross-sectional shape is formed in the flange portion 32 of the ventilation lid 14 integrally with the end portion of the flange portion 32. Inserting the engaging portion 114 into the receiving portion 116 so that the fitting portion 38 of the lid 14 is inserted into the upper end of the heel body 12 and the engaging portion 114 of the heel body 12 is turned from the side of the receiving portion 116. Thus, the ventilation lid 14 is attached to the bag main body 12. Thereby, even when a positive pressure is generated inside the bag main body 12, the ventilation lid 14 does not come off the bag main body 12. Note that the heel body 12 forming the engaging portion 114 may be a merging heel.

また、上述の各実施例ではいずれも、弁支持体４２を通気蓋１４と別体に形成したが、これに限定されず、弁支持体４２を一体化させた通気蓋１４を形成してもよい。 In each of the above-described embodiments, the valve support 42 is formed separately from the vent lid 14. However, the present invention is not limited to this, and the vent lid 14 may be formed by integrating the valve support 42. Good.

さらにまた、上述の各実施例ではいずれも、空気流入口３４を鍔部の上面に沿うように形成したが、これに限定されない。たとえば、筒状部３０の上部に空気流入口３４を形成してもよい。 Furthermore, in each of the above-described embodiments, the air inlet 34 is formed so as to be along the upper surface of the flange portion, but the present invention is not limited to this. For example, the air inlet 34 may be formed in the upper part of the cylindrical part 30.

また、上述の各実施例ではいずれも、通気弁７２は弾性力などによってその閉止状態が維持され、第２の通気弁８０は自重によってその閉止状態が維持されたが、これに限定されない。たとえば、通気弁７２の弁体７０を摺動軸６８の上端に形成して、自重によって閉止状態を維持させ、そして、第２の通気弁８０の弁体１１２を摺動軸１１２の下端に形成して、弾性力などによって閉止状態を維持させてもよい。 In each of the above-described embodiments, the closed state of the vent valve 72 is maintained by elastic force or the like, and the closed state of the second vent valve 80 is maintained by its own weight. However, the present invention is not limited to this. For example, the valve body 70 of the vent valve 72 is formed at the upper end of the sliding shaft 68 to maintain the closed state by its own weight, and the valve body 112 of the second vent valve 80 is formed at the lower end of the sliding shaft 112. Then, the closed state may be maintained by an elastic force or the like.

さらにまた、上述の各実施例ではいずれも、排水桝１０を建築物の床１２０下に設けたが、これに限定されず、建築物の排水経路であれば、任意の場所に設けることができる。 Furthermore, in each of the above-described embodiments, the drainage basin 10 is provided under the floor 120 of the building. However, the present invention is not limited to this, and any drainage route of the building can be provided in any place. .

なお、上述した径や高さ等の具体的数値は、いずれも単なる一例であり、必要に応じて適宜変更可能である。 Note that the specific numerical values such as the diameter and height described above are merely examples, and can be appropriately changed as necessary.

この発明の一実施例の排水桝によって第２排水管と第１排水管とを接続した状態を示す断面図である。It is sectional drawing which shows the state which connected the 2nd drain pipe and the 1st drain pipe with the drainage basin of one Example of this invention. 図１の排水桝を示す図解図である。It is an illustration figure which shows the drainage tank of FIG. 図１の桝本体を示す断面図である。It is sectional drawing which shows the bag main body of FIG. 図１の通気蓋を示す斜視図である。It is a perspective view which shows the ventilation lid of FIG. 図４の通気蓋を示す断面図である。It is sectional drawing which shows the ventilation lid of FIG. 図７の通気蓋が備える弁支持体を示す斜視図である。It is a perspective view which shows the valve support body with which the ventilation lid of FIG. 7 is provided. 図７の通気蓋が備える弁支持体を示す断面図である。It is sectional drawing which shows the valve support body with which the ventilation lid of FIG. 7 is provided. この発明の他の実施例の排水桝によって第２排水管と第１排水管とを接続した状態を示す断面図である。It is sectional drawing which shows the state which connected the 2nd drain pipe and the 1st drain pipe with the drainage basin of the other Example of this invention. 図８の桝本体を示す断面図である。It is sectional drawing which shows the bag main body of FIG. 図８の桝本体を示す斜視図である。It is a perspective view which shows the bag main body of FIG. 図８の桝本体が備える仕切体を示す斜視図である。It is a perspective view which shows the partition with which the bag main body of FIG. 8 is provided. この発明の他の一実施例の排水桝を示す図解図である。It is an illustration figure which shows the drainage of another Example of this invention.

Explanation of symbols

１０ …排水桝
１２ …桝本体
１４ …通気蓋
１６ …側壁部
１８ …点検口
２０ …流入口
２２ …流出口
３０ …筒状部
３２ …鍔部
３４ …空気流入口
４２ …弁支持体
７２ …通気弁
８０ …第２の通気弁
１２４ …第１排水管
１２４ …第２排水管 DESCRIPTION OF SYMBOLS 10 ... Drainage basin 12 ... Sag body 14 ... Vent cover 16 ... Side wall part 18 ... Inspection port 20 ... Inlet 22 ... Outlet 30 ... Cylindrical part 32 ... Girder part 34 ... Air inlet 42 ... Valve support 72 ... Ventilation Valve 80 ... Second vent valve 124 ... First drain pipe 124 ... Second drain pipe

Claims

In a drainage basin comprising a main body having an inlet, an outlet and an inspection port, and a vent lid connected to the inspection port,
The vent lid is normally kept closed, and is provided with a vent valve that communicates the outside air with the inside of the bag body when the inside of the bag body becomes negative pressure. , Drainage.

The drainage basin according to claim 1, wherein an air inlet that communicates outside air and the inside of the vent lid is formed in the vent lid.

An air inflow chamber into which outside air flows from the air inflow port is formed inside the vent lid,
The vent lid further includes a second vent valve that normally maintains a closed state and communicates the air inlet and the vent valve when the inside of the bag main body becomes negative pressure,
The drainage basin according to claim 1 or 2, wherein the second vent valve communicates with the air inlet through the air inflow chamber.

The vent lid includes a valve support provided with the vent valve and the second vent valve,
The drainage basin according to claim 3, wherein the air inflow chamber is formed inside the valve support.

The vent lid includes a cylindrical portion formed in a cylindrical shape with its upper end sealed,
The valve support is mounted inside the tubular portion to form an inter-valve communication chamber that communicates the vent valve and the second vent valve, and further, the air inflow to the valve support The drainage basin according to claim 4, wherein a seal member that seals between an inner surface of the cylindrical portion and the valve support is provided at positions of an upper portion and a lower portion of the chamber.