JPH11241394A - Check valve in catch basin - Google Patents
Check valve in catch basinInfo
- Publication number
- JPH11241394A JPH11241394A JP5609198A JP5609198A JPH11241394A JP H11241394 A JPH11241394 A JP H11241394A JP 5609198 A JP5609198 A JP 5609198A JP 5609198 A JP5609198 A JP 5609198A JP H11241394 A JPH11241394 A JP H11241394A
- Authority
- JP
- Japan
- Prior art keywords
- main body
- pipe
- pipe connection
- drainage basin
- upstream pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Sewage (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば宅地からの
排水管の中継点や合流点等に設置される排水桝に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage basin installed at a junction or a junction of a drainage pipe from a residential land, for example.
【０００２】[0002]
【従来の技術】宅地からの排水管の中継点に設置される
従来の排水桝（公共桝）を図７に示す。該排水桝１Ｐに
は、宅地側からの上流管４Ｐａと、下水本管５Ｐに連絡
する下流管４Ｐｂとが接続されている。このような排水
桝１Ｐにおいて、該上流管４Ｐａは、該上流管４Ｐａの
内側底面41Ｐａが該排水桝１Ｐの内側底面14Ｐよりも高
くなるように接続されており、該下流管４Ｐｂは、該下
流管４Ｐｂの内側底面41Ｐｂが該排水桝１Ｐの内側底面
14Ｐと略同じ位置になるように接続されているため、通
常の状況の下では、排水は上流管４Ｐａから排水桝１Ｐ
を介して下流管４Ｐｂにスムーズに流下して行く。2. Description of the Related Art A conventional drainage basin (public basin) installed at a junction of a drainage pipe from a residential land is shown in FIG. An upstream pipe 4Pa from the residential land side and a downstream pipe 4Pb communicating with the sewage main pipe 5P are connected to the drainage basin 1P. In such a drainage basin 1P, the upstream pipe 4Pa is connected such that the inner bottom surface 41Pa of the upstream pipe 4Pa is higher than the inner bottom surface 14P of the drainage basin 1P, and the downstream pipe 4Pb is connected to the downstream pipe 4Pb. The inner bottom surface 41Pb of the pipe 4Pb is the inner bottom surface of the drainage basin 1P.
Under normal conditions, drainage flows from the upstream pipe 4Pa to the drainage basin 1P
Through the downstream pipe 4Pb smoothly.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、例えば
洪水や下水本管５Ｐの管詰まり等によって、下水本管５
Ｐが排水（雨水・汚水）で満管状態になった場合、該下
水本管内５Ｐの排水は下流管４Ｐｂを経て排水桝１Ｐ内
に逆流する。そして、該排水桝１Ｐ内の水位が上流管４
Ｐａの内側底面41Ｐａよりも高くなると、該排水は排水
桝１Ｐから上流管４Ｐａに流れ込み、宅地側に逆流して
しまう（図７点線）。However, due to, for example, flooding or clogging of the sewage main pipe 5P, the sewage main pipe 5P is not provided.
When P becomes full due to drainage (rainwater and sewage), the drainage in the sewage main pipe 5P flows back into the drainage basin 1P via the downstream pipe 4Pb. The water level in the drainage basin 1P is
If the inner bottom surface of Pa becomes higher than 41Pa, the drainage flows from the drainage basin 1P into the upstream pipe 4Pa and flows back to the residential land side (dotted line in FIG. 7).
【０００４】従って、本発明の課題は、排水桝において
排水の逆流を防止することのできる手段を提供すること
である。[0004] Accordingly, an object of the present invention is to provide means capable of preventing backflow of drainage in a drainage basin.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記課題を解
決するために、排水桝本体（11）下部に上流管接続部
（２）と下流管接続部（12）とを設けた構成であって、
該上流管接続部（２）は管本体（23）と該管本体（23）
端部に形成されている受口部（21）とからなり、該管本
体（23）が該受口部（21）よりも下方に大径とされるこ
とによって該管本体（23）と該受口部（21）との境界に
は段部（22）が形成され、該上流管接続部（２）の内側
上部からは弁体（３）が揺動可能に吊り下げられてお
り、該弁体（３）は、該排水桝（１）内の水位が上昇す
ると浮力によって揺動して該段部（22）に当接し、もっ
て該上流管接続部（２）の管路を閉塞することを特徴と
する排水桝（１）における逆流防止弁を提供するもので
あり、また、管本体（23）と該管本体（23）端部に形成
されている受口部（21）とからなり、該管本体（23）が
該受口部（21）よりも下方に大径とされることによって
該管本体（23）と該受口部（21）との境界に段部（22）
が形成されている排水桝用上流管接続部材（２）と、該
接続部材（２）の内側上部から揺動可能に吊り下げられ
た弁体（３）とから構成され、該弁体（３）は、該排水
桝（１）内の水位が上昇すると浮力によって揺動して該
段部（22）に当接し、もって該接続部材（３）の管路を
閉塞することを特徴とする排水桝用逆流防止弁付上流管
接続部材を提供するものであり、更に、排水桝本体（1
1）下部に、上記逆流防止弁付上流管接続部材と、下流
管接続部（12）とを設けたことを特徴とする排水桝
（１）を提供するものである。According to the present invention, in order to solve the above-mentioned problems, an upstream pipe connecting portion (2) and a downstream pipe connecting portion (12) are provided below a drainage basin body (11). So,
The upstream pipe connection part (2) includes a pipe body (23) and the pipe body (23).
The pipe body (23) has a larger diameter below the mouth part (21). A step (22) is formed at the boundary with the receiving portion (21), and a valve element (3) is swingably suspended from the upper inside of the upstream pipe connection part (2). When the water level in the drainage basin (1) rises, the valve element (3) swings due to buoyancy and abuts on the step (22), thereby closing the pipeline of the upstream pipe connection part (2). The present invention provides a check valve in a drainage basin (1), and comprises a pipe body (23) and a port (21) formed at an end of the pipe body (23). The pipe body (23) has a larger diameter below the port (21), so that a step (22) is formed at the boundary between the pipe body (23) and the port (21).
And a valve element (3) suspended from the upper inside of the connection member (2) so as to be swingable, and the valve element (3) ) Is characterized in that when the water level in the drainage basin (1) rises, it swings by buoyancy and abuts on the step (22), thereby closing the conduit of the connecting member (3). The present invention provides an upstream pipe connecting member with a check valve for a basin.
1) A drainage basin (1) characterized in that an upstream pipe connecting member with a check valve and a downstream pipe connecting portion (12) are provided in a lower portion.
【０００６】上記弁体（３）は、該上流管接続部（２）
の管路を閉塞する本体部（31）と、該本体部（31）上縁
に連続し該上流管接続部（２）の内側上部に取り付けら
れる取付部（32）とを具備し、該本体部（31）と該取付
部（32）との境界部分がヒンジ（33）を構成しており、
該本体部（31）の比重が１未満であるものであってもよ
いし、該上流管接続部（２）の管路を閉塞する本体部
（31Ｂ）と、該本体部（31Ｂ）上縁に連続し該上流管接
続部（２）の内側上部に取り付けられる取付部（32Ｂ）
と、該本体部（31Ｂ）の下部に設けられ該本体部（31
Ｂ）に浮力を与えるフロート部（34Ｂ）とを具備し、該
本体部（31Ｂ）と該取付部（32Ｂ）との境界部分がヒン
ジ（33Ｂ）を構成しているものであってもよい。The valve element (3) is connected to the upstream pipe connection part (2).
A main body part (31) for closing the pipe line of the above, and a mounting part (32) which is connected to the upper edge of the main body part (31) and is mounted on the upper inside of the upstream pipe connection part (2). A boundary portion between the portion (31) and the mounting portion (32) forms a hinge (33),
The specific gravity of the main body portion (31) may be less than 1, or a main body portion (31B) for closing a pipe of the upstream pipe connection portion (2) and an upper edge of the main body portion (31B). (32B) attached to the upper part inside the upstream pipe connection part (2)
And a main body (31B) provided below the main body (31B).
B) may be provided with a float portion (34B) for giving buoyancy, and a boundary between the main body portion (31B) and the mounting portion (32B) may constitute a hinge (33B).
【０００７】[0007]
【発明の実施の形態】以下、図面を参照して本発明を詳
細に説明する。本発明の一実施形態による排水桝を図１
に示す。図１に示す排水桝１は、桝本体11と、該桝本体
11の下流側下部に突設され下流管４ｂが接続される下流
管接続部12と、該桝本体11の上流側下部に貫通配設され
上流管４ａが接続される上流管接続部２とを具備する。
該桝本体11の上端は点検筒接続部13となっており、該桝
本体11の内側底面14は下流側が低くなるように若干傾斜
している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 shows a drainage basin according to an embodiment of the present invention.
Shown in The drainage basin 1 shown in FIG.
A downstream pipe connecting portion 12 protruding from a lower portion on the downstream side of the pipe 11 and connected to the downstream pipe 4b, and an upstream pipe connecting portion 2 disposed through the lower portion on the upstream side of the box body 11 and connected to the upstream pipe 4a. Have.
The upper end of the box body 11 is a check tube connecting portion 13, and the inner bottom surface 14 of the box body 11 is slightly inclined so that the downstream side becomes lower.
【０００８】本実施形態では、該下流管接続部12は挿口
となっており、該下流管接続部12の内側底面121 が桝本
体11の内側底面14と略同じ高さになるように、該桝本体
11の下流側周壁下部に突設されている。該上流管接続部
２は、管本体23と該管本体23の端部に形成されている受
口部21とからなり、該管本体23は、該受口部21よりも下
方に大径とされており、それによって該管本体23と該受
口部21との境界には段部22が形成されている（図２参
照）。この上流管接続部２は、該管本体23の外側底面23
1 が上記桝本体11の内側底面14に接触するように、該桝
本体11の上流側下部に貫通配設されている。In the present embodiment, the downstream pipe connecting portion 12 is an opening, and the inner bottom surface 121 of the downstream pipe connecting portion 12 is substantially the same height as the inner bottom surface 14 of the box body 11. The main body
It protrudes from the lower part of the 11 downstream peripheral wall. The upstream pipe connecting portion 2 includes a pipe main body 23 and a receiving portion 21 formed at an end of the pipe main body 23, and the pipe main body 23 has a large diameter below the receiving portion 21. As a result, a step 22 is formed at the boundary between the pipe main body 23 and the socket 21 (see FIG. 2). The upstream pipe connecting portion 2 is provided on the outer bottom surface 23 of the pipe main body 23.
1 is provided at the lower portion on the upstream side of the box body 11 so as to contact the inner bottom surface 14 of the box body 11.
【０００９】該上流管接続部２の内側上部からは、弁体
３が吊り下げられている。該弁体３は、図２に示すよう
に、上流管接続部２の管路を閉塞する縦長楕円形状の本
体部31と、該本体部31上縁に連続し該上流管接続部２の
内側上部に取り付けられる取付部32とからなる。該本体
部31と該取付部32との境界部分には切込みが入れられ、
該本体部31が揺動可能なようにヒンジ部33を構成してい
る。A valve 3 is suspended from the upper inside of the upstream pipe connection 2. As shown in FIG. 2, the valve body 3 has a vertically-elliptical main body 31 that closes the conduit of the upstream pipe connection part 2, and is connected to the upper edge of the main body 31 and is inside the upstream pipe connection part 2. And an attachment part 32 attached to the upper part. A cut is made in a boundary portion between the main body 31 and the mounting portion 32,
The hinge part 33 is configured so that the main body part 31 can swing.
【００１０】上記弁体３は、非透水性及び可撓性を有す
る必要があるが、それ以外にも、少なくとも本体部31が
水に浮くように、比重が１未満である必要がある。この
ような弁体３の材料としては、ポリエチレン、ポリプロ
ピレン、あるいは独立気泡を有する発泡ポリエチレン、
発泡ポリプロピレン、発泡ポリスチレン、ウレタン発泡
体、ゴムの発泡体、スチレン−ブタジエン−スチレン共
重合体（ＳＢＳ）、スチレン−エチレン／ブチレン−ス
チレン共重合体（ＳＥＢＳ）、スチレン−イソプレン−
スチレン共重合体（ＳＩＳ）、スチレン−エチレン／プ
ロピレン−スチレン共重合体（ＳＥＰＳ）等のエラスト
マーの発泡体等が挙げられる。[0010] The valve element 3 needs to have water impermeability and flexibility, but also needs to have a specific gravity of less than 1 so that at least the main body 31 floats on water. As a material of such a valve body 3, polyethylene, polypropylene, or foamed polyethylene having closed cells,
Expanded polypropylene, expanded polystyrene, urethane foam, rubber foam, styrene-butadiene-styrene copolymer (SBS), styrene-ethylene / butylene-styrene copolymer (SEBS), styrene-isoprene-
Elastomer foams such as styrene copolymer (SIS) and styrene-ethylene / propylene-styrene copolymer (SEPS) are exemplified.
【００１１】上記弁体３は、本体部31を上流管接続部内
方側にして取付部32を介して該上流管接続部２に取り付
けられ、常態において、該本体部31は該取付部32と略直
角をなすか、又は該本体部31の下縁が若干上流側に寄る
ように傾いており、該本体部31の下縁と該上流管接続部
２との間には間隙がある。該本体部31が該上流管接続部
２の受口部21側に揺動すると、該本体部31の下縁が該上
流管接続部２の段部22上縁に当接すると同時に、該本体
部31が該上流管接続部２の管路を閉塞する。The valve body 3 is attached to the upstream pipe connection part 2 via a mounting part 32 with the main body part 31 being on the inner side of the upstream pipe connection part. It forms a substantially right angle, or the lower edge of the main body 31 is slightly inclined toward the upstream side, and there is a gap between the lower edge of the main body 31 and the upstream pipe connection 2. When the main body 31 swings toward the receiving port 21 side of the upstream pipe connection section 2, the lower edge of the main body section 31 contacts the upper edge of the step 22 of the upstream pipe connection section 2, and The part 31 closes the pipeline of the upstream pipe connection part 2.
【００１２】上記排水桝１においては、通常の状況の下
では、上流管４ａから流れてきた排水は、弁体３の本体
部31下縁と上流管接続部２の段部22との間を通って、ま
たは排水の量が多く勢いがある場合には、該弁体３本体
部31を排水桝１の内方に揺動させながら該排水桝１の中
に流れ込む（図３）。該排水桝１の中に流れ込んだ排水
は、該排水桝１桝本体11の傾斜した内側底面14に沿って
流下し、下流管接続部12を介して下流管４ｂに排出され
る。In the drainage basin 1, under normal conditions, the drainage flowing from the upstream pipe 4 a flows between the lower edge of the main body 31 of the valve 3 and the step 22 of the upstream pipe connection 2. When the amount of drainage passes through or when the amount of drainage is strong, the valve body 3 flows into the drainage basin 1 while swinging the body 31 of the valve body 3 inward (FIG. 3). The drainage flowing into the drainage basin 1 flows down along the inclined inner bottom surface 14 of the drainage basin 1 basin body 11, and is discharged to the downstream pipe 4b via the downstream pipe connection portion 12.
【００１３】一方、例えば洪水等によって排水が下流管
４ｂから排水桝１内に逆流して、該排水桝１内の水位が
弁体３の本体部31下端よりも高くなると、図４に示すよ
うに該本体部31が浮力によってヒンジ部33を軸として揺
動し、該本体部31の下縁が上流管接続部２の段部22上縁
に当接すると同時に、該本体部31が該上流管接続部２の
管路を閉塞する。そのため、排水桝１内の排水が上流管
４ａに逆流することが防止される。なお、排水桝１内の
排水の水位が下降すれば、それに伴って弁体３の本体部
31が常態に戻り、上流管接続部２の管路が開放される。On the other hand, when drainage flows backward from the downstream pipe 4b into the drainage basin 1 due to, for example, flooding, and the water level in the drainage basin 1 becomes higher than the lower end of the main body 31 of the valve body 3, as shown in FIG. At the same time, the main body 31 swings about the hinge 33 by buoyancy, and the lower edge of the main body 31 contacts the upper edge of the step 22 of the upstream pipe connecting portion 2 and at the same time, the main body 31 The pipe line of the pipe connection part 2 is closed. Therefore, the drainage in the drainage basin 1 is prevented from flowing back to the upstream pipe 4a. When the water level of the drainage in the drainage basin 1 falls, the body of the valve body 3
31 returns to the normal state, and the pipeline of the upstream pipe connection part 2 is opened.
【００１４】本発明における排水桝、上流管接続部、弁
体等は、図面に示した態様に限定されることはなく、本
発明の範囲を逸脱しない限り種々の変更を施すことがで
きる。例えば、弁体を発泡ポリエチレン、発泡ポリプロ
ピレン等によって成形した場合、図５に示すように、該
弁体３Ａの本体部31Ａは肉厚にするのが好ましい。The drainage basin, upstream pipe connection, valve body, etc. in the present invention are not limited to the embodiments shown in the drawings, and various modifications can be made without departing from the scope of the present invention. For example, when the valve body is formed of foamed polyethylene, foamed polypropylene, or the like, it is preferable that the body portion 31A of the valve body 3A be thick as shown in FIG.
【００１５】また、図６に示すように、弁体３Ｂ本体部
31Ｂの下部に比重の小さい、即ち浮力の大きいフロート
部34Ｂを設けてもよい。該フロート部34Ｂは、例えば発
泡スチロール、発泡ウレタン等よって形成してもよい
し、ポリエチレン、ポリプロピレン等の合成樹脂からな
る中空体としてもよい。このようなフロート部34Ｂを設
ければ、弁体３Ｂ自体の比重を１未満に制限する必要は
ない。As shown in FIG. 6, the main body of the valve body 3B
A float 34B having a small specific gravity, that is, a large buoyancy may be provided at a lower portion of the bottom 31B. The float portion 34B may be formed of, for example, styrene foam, urethane foam, or the like, or may be a hollow body made of a synthetic resin such as polyethylene or polypropylene. If such a float portion 34B is provided, it is not necessary to limit the specific gravity of the valve body 3B itself to less than 1.
【００１６】以上説明した本発明の排水桝は、宅地から
の排水管の中継点、合流点等に設置されるいわゆる公共
桝として使用することもできるし、宅地内に設置される
排水桝として使用することもできる。The drainage basin of the present invention described above can be used as a so-called public basin installed at a junction or a junction of a drainage pipe from a residential land, or as a drainage basin installed in a residential land. You can also.
【００１７】[0017]
【発明の効果】本発明によれば、排水桝における排水の
逆流を防止することができる。According to the present invention, backflow of drainage in a drainage basin can be prevented.
【図１】本発明の一実施形態による排水桝の断面図であ
る。FIG. 1 is a sectional view of a drainage basin according to an embodiment of the present invention.
【図２】図１の排水桝における上流管接続部及び弁体の
分解斜視図である。FIG. 2 is an exploded perspective view of an upstream pipe connection portion and a valve body in the drainage basin of FIG.
【図３】図１の排水桝における上流管接続部及び弁体の
断面図（通常時）である。FIG. 3 is a sectional view (at normal time) of an upstream pipe connection portion and a valve body in the drainage basin of FIG. 1;
【図４】図１の排水桝における上流管接続部及び弁体の
断面図（水位上昇時）である。FIG. 4 is a cross-sectional view (when the water level rises) of an upstream pipe connection portion and a valve body in the drainage basin of FIG. 1;
【図５】本発明における弁体の他の実施形態を示す斜視
図である。FIG. 5 is a perspective view showing another embodiment of the valve body according to the present invention.
【図６】本発明における弁体の別の実施形態を示す斜視
図である。FIG. 6 is a perspective view showing another embodiment of the valve body according to the present invention.
【図７】従来の排水桝の断面図である。FIG. 7 is a sectional view of a conventional drainage basin.
１，１Ｐ…排水桝 11…桝本体 12…下流管接続部 121 …内側底面 13…点検筒接続部 14，14Ｐ…内側底面 ２…上流管接続部 21…受口部 22…段部 23…管本体 231 …外側底面 ３，３Ａ，３Ｂ…弁体 31，31Ａ，31Ｂ…本体部 32，32Ａ、32Ｂ…取付部 33，33Ａ，33Ｂ…ヒンジ部 34Ｂ…フロート部 ４ａ，４Ｐａ…上流管 ４ｂ，４Ｐｂ…下流管 41Ｐａ，41Ｐｂ…内側底面 ５Ｐ…下水本管 1, 1P ... drainage basin 11 ... basin body 12 ... downstream pipe connection part 121 ... inner bottom surface 13 ... inspection tube connection part 14, 14P ... inner bottom surface 2 ... upstream pipe connection part 21 ... receiving part 22 ... step part 23 ... pipe Body 231 ... Outside bottom surface 3,3A, 3B ... Valve element 31,31A, 31B ... Main body part 32,32A, 32B ... Mounting part 33,33A, 33B ... Hinge part 34B ... Float part 4a, 4Pa ... Upstream pipe 4b, 4Pb … Downstream pipe 41Pa, 41Pb… Inner bottom face 5P… Sewage main pipe
Claims (5)
接続部とを設けた構成であって、該上流管接続部は管本
体と該管本体端部に形成されている受口部とからなり、
該管本体が該受口部よりも下方に大径とされることによ
って該管本体と該受口部との境界には段部が形成され、
該上流管接続部の内側上部からは弁体が揺動可能に吊り
下げられており、該弁体は、該排水桝内の水位が上昇す
ると浮力によって揺動して該段部に当接し、もって該上
流管接続部の管路を閉塞することを特徴とする排水桝に
おける逆流防止弁。An upstream pipe connection portion and a downstream pipe connection portion are provided at a lower portion of a drainage basin main body, the upstream pipe connection portion being a pipe main body and a receiving portion formed at an end of the pipe main body. Consisting of
A step is formed at the boundary between the pipe main body and the receiving portion by the pipe main body having a larger diameter below the receiving portion,
A valve body is hung from the upper inside of the upstream pipe connection portion so as to be swingable, and the valve body swings by buoyancy when the water level in the drainage basin rises and abuts on the step portion, A check valve in a drainage basin characterized by closing a pipe line of the upstream pipe connection portion.
する本体部と、該本体部上縁に連続し該上流管接続部の
内側上部に取り付けられる取付部とを具備し、該本体部
と該取付部との境界部分はヒンジを構成しており、該本
体部の比重は１未満である請求項１記載の排水桝におけ
る逆流防止弁。2. The valve body comprises: a main body for closing a conduit of the upstream pipe connection; and a mounting part connected to an upper edge of the main body and mounted on an upper inside of the upstream pipe connection. The check valve in a drainage basin according to claim 1, wherein a boundary portion between the main body portion and the mounting portion forms a hinge, and a specific gravity of the main body portion is less than 1.
する本体部と、該本体部上縁に連続し該上流管接続部の
内側上部に取り付けられる取付部と、該本体部の下部に
設けられ該本体部に浮力を与えるフロート部とを具備
し、該本体部と該取付部との境界部分はヒンジを構成し
ている請求項１記載の排水桝における逆流防止弁。3. The valve body includes a main body that closes a conduit of the upstream pipe connection part, a mounting part that is connected to an upper edge of the main body part and is mounted on an upper inside of the upstream pipe connection part, and the main body. 2. The check valve according to claim 1, further comprising: a float provided at a lower portion of the portion to give buoyancy to the main body, wherein a boundary between the main body and the mounting portion constitutes a hinge.
受口部とからなり、該管本体が該受口部よりも下方に大
径とされることによって該管本体と該受口部との境界に
段部が形成されている排水桝用上流管接続部材と、該接
続部材の内側上部から揺動可能に吊り下げられた弁体と
から構成され、該弁体は、該排水桝内の水位が上昇する
と浮力によって揺動して該段部に当接し、もって該接続
部材の管路を閉塞することを特徴とする排水桝用逆流防
止弁付上流管接続部材。4. A pipe main body and a receiving portion formed at an end of the pipe main body, wherein the pipe main body has a larger diameter below the receiving portion, so that the pipe main body and the receiving portion are formed. An upstream pipe connecting member for a drainage basin having a step formed at the boundary with the mouth, and a valve body swingably suspended from the upper inside of the connecting member. An upstream pipe connection member with a check valve for a drainage basin, characterized in that when the water level in the drainage basin rises, it swings due to buoyancy and abuts on the step, thereby closing the pipe of the connection member.
防止弁付上流管接続部材と、下流管接続部とを設けたこ
とを特徴とする排水桝。5. A drainage basin comprising the upstream pipe connection member with a check valve according to claim 4 and a downstream pipe connection portion provided below the drainage basin body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5609198A JPH11241394A (en) | 1998-02-20 | 1998-02-20 | Check valve in catch basin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5609198A JPH11241394A (en) | 1998-02-20 | 1998-02-20 | Check valve in catch basin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11241394A true JPH11241394A (en) | 1999-09-07 |
Family
ID=13017438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5609198A Withdrawn JPH11241394A (en) | 1998-02-20 | 1998-02-20 | Check valve in catch basin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11241394A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006183454A (en) * | 2004-12-01 | 2006-07-13 | Tokyo Metropolitan Sewerage Service Corp | Check valve and drainage facilities |
| JP2006283547A (en) * | 2005-03-08 | 2006-10-19 | Maezawa Kasei Ind Co Ltd | Backflow preventive device of public basin, public basin and method for installing backflow preventive device for public basin in public basin |
| JP2008261223A (en) * | 2005-03-08 | 2008-10-30 | Maezawa Kasei Ind Co Ltd | Public basin |
| JP2008297772A (en) * | 2007-05-30 | 2008-12-11 | Toa Grout Kogyo Co Ltd | Socket for gully |
| JP2012162981A (en) * | 2004-12-01 | 2012-08-30 | Tokyo Metropolitan Sewerage Service Corp | Check valve and drainage facility |
| CN104278731A (en) * | 2013-07-01 | 2015-01-14 | 天津滨海德美机电设备工程有限公司 | Duckbill valve moistureproof well system |
| JP2018204197A (en) * | 2017-05-31 | 2018-12-27 | アロン化成株式会社 | Catch basin |
| JP2020153508A (en) * | 2019-03-22 | 2020-09-24 | 前澤化成工業株式会社 | Backflow prevention device |
| JP2021038662A (en) * | 2020-12-08 | 2021-03-11 | アロン化成株式会社 | Check valve |
| JP2021055535A (en) * | 2020-12-01 | 2021-04-08 | アロン化成株式会社 | Catch basin |
-
1998
- 1998-02-20 JP JP5609198A patent/JPH11241394A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006183454A (en) * | 2004-12-01 | 2006-07-13 | Tokyo Metropolitan Sewerage Service Corp | Check valve and drainage facilities |
| JP2012162981A (en) * | 2004-12-01 | 2012-08-30 | Tokyo Metropolitan Sewerage Service Corp | Check valve and drainage facility |
| JP2006283547A (en) * | 2005-03-08 | 2006-10-19 | Maezawa Kasei Ind Co Ltd | Backflow preventive device of public basin, public basin and method for installing backflow preventive device for public basin in public basin |
| JP2008261223A (en) * | 2005-03-08 | 2008-10-30 | Maezawa Kasei Ind Co Ltd | Public basin |
| JP2008261222A (en) * | 2005-03-08 | 2008-10-30 | Maezawa Kasei Ind Co Ltd | Backflow prevention device for public basin, and public basin |
| JP2008297772A (en) * | 2007-05-30 | 2008-12-11 | Toa Grout Kogyo Co Ltd | Socket for gully |
| CN104278731A (en) * | 2013-07-01 | 2015-01-14 | 天津滨海德美机电设备工程有限公司 | Duckbill valve moistureproof well system |
| JP2018204197A (en) * | 2017-05-31 | 2018-12-27 | アロン化成株式会社 | Catch basin |
| JP2020153508A (en) * | 2019-03-22 | 2020-09-24 | 前澤化成工業株式会社 | Backflow prevention device |
| JP2021055535A (en) * | 2020-12-01 | 2021-04-08 | アロン化成株式会社 | Catch basin |
| JP2021038662A (en) * | 2020-12-08 | 2021-03-11 | アロン化成株式会社 | Check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050510 |