JP3676149B2 - Rainwater storage device - Google Patents

Rainwater storage device Download PDF

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Publication number
JP3676149B2
JP3676149B2 JP30841999A JP30841999A JP3676149B2 JP 3676149 B2 JP3676149 B2 JP 3676149B2 JP 30841999 A JP30841999 A JP 30841999A JP 30841999 A JP30841999 A JP 30841999A JP 3676149 B2 JP3676149 B2 JP 3676149B2
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rainwater
channel
convex portion
storage device
drainage channel
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JP2001123484A (en
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明博 毛利
健司 川地
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Fukuvi Chemical Industry Co Ltd
Yagikuma Co Ltd
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Fukuvi Chemical Industry Co Ltd
Yagikuma Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108—Rainwater harvesting

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Description

【０００１】
【発明の属する技術分野】
本発明は、雨水貯留装置の改良、より詳しくは、塵埃を多く含む降り始めの初期雨水を排除して、それ以後のきれいな雨水を貯留することができる雨水の貯留装置に関するものである。
【０００２】
【従来の技術】
従来、建物の屋根や屋上に降った雨水を貯留タンクに貯め、この雨水を生活用水として有効利用することが行なわれている。しかしながら、従来の雨水貯留装置は、屋根に配設された雨樋と貯留タンクとを単に連結したものであり、全ての雨水を貯留タンクに集める構造になっていたため、空気中や屋根面の塵埃を多く含んだ降り始めの初期雨水をもタンクに集めることになり、貯留した雨水が汚れてしまったり、タンク内にすぐに塵埃が溜まって頻繁に清掃しなければならないなどの難点があった。
【０００３】
【発明が解決しようとする課題】
本発明は、従来の雨水貯留装置に上記の如き難点があったことに鑑みて為されたものであり、塵埃を多く含んだ降り始めの汚れた初期雨水を排除して、それ以後のきれいな雨水をタンクに貯留することができる、構造簡素で分解容易な雨水貯留装置を提供することを技術的課題とするものである。
【０００４】
また、本発明の他の技術的課題は、塵埃を多く含んだ降り始めの汚れた初期雨水を確実に排水路へ排除することができる雨水貯留装置を提供することにある。
【０００５】
また、本発明の他の技術的課題は、貯留タンクが満杯になったときに、余分な雨水を、初期雨水を排除した排水路の方へ流出させることができる雨水貯留装置を提供することにある。
【０００６】
また、本発明の他の技術的課題は、雨水を汚れた初期雨水ときれいな雨水とに分流する分流器を雨樋から取り外して簡単に清掃することができるメンテナンス容易な雨水貯留装置を提供することにある。
【０００７】
更にまた、本発明の他の技術的課題は、雨水の貯留量を適宜に増減することができる雨水貯留装置を提供することにある。
【０００８】
【課題を解決するための手段】
本発明は、上記技術的課題を解決するために、
雨水が流れる雨樋Ｇに接続され、内部で排水路11と集水路12とに分岐した分流器１と、この分流器１の集水路12に接続され、雨水を貯留する貯留タンク２とから成る雨水貯留装置であって、
この分流器１は、雨樋Ｇに接続される導入端部10ａの部分を除いて、角形管状に成形された導入路10と、この導入路10の下方で二股に分岐した角形管状の排水路11および集水路12とを備える一方、この分流器１が前記二股に分岐する当該分岐部の下方には前記集水路 12 と排水路 11 とを連通する越流路 16 が形成されて前記貯留タンク２が満杯時の余剰雨水を排水路 11 へ排水可能であり、かつ、この排水路11と集水路12とに分岐する当該分流器１の内面には集水路12へ向けて突出した分流凸部13が形成されていると共に、この分流凸部13の上方には当該分流凸部13とは反対方向へ相向いに差し向かうごとく突出した整流凸部14を形成して導入端部10ａを通じ雨樋Ｇから流入する雨水が導入路10の前記分流突部 13 と整流突部 14 とを流下するように構成することにより、
分水器１に流れ込む雨水量が小さくて整流凸部14および分流凸部13を流下する雨水Ｗ1 の水位が低いときには、当該雨水Ｗ1 が分流凸部13の端縁から排水路11へ流れ込ませることによって排水させ、
分水器１に流れ込む雨水量が大きくなり整流凸部14および分流凸部13を流下する雨水Ｗ2 の水位が高くなったときには、当該雨水Ｗ2 が流下慣性を得て勢いよく集水路12に注ぎ込むことによって集水できるように構成した点に特徴がある。
【０００９】
また、本発明は上記課題を解決するために、必要に応じて上記手段に加えて、排水路11と集水路12とに分岐する当該導入路10の雨水流路を挟む路壁内面に、排水路11側の側端部15ａが低くて集水路12側の側端部15ｂが高い傾斜状の誘導凸部15が形成するという技術的手段を採用した。
【００１０】
【００１１】
また、本発明は上記課題を解決するために、必要に応じて上記手段に加え、分流器１が合成樹脂にて一体成形されており、雨樋Ｇに対し着脱自在に構成されているという技術的手段を採用した。
【００１２】
更にまた、本発明は上記課題を解決するために必要に応じて上記手段に加え、複数の貯留タンク２が分離可能に連結されているという技術的手段を採用したのである。
【００１３】
【発明の実施の形態】
以下、本発明に係る雨水貯留装置を添付図面に示す実施形態に基いて詳しく説明する。なお、図１は本実施形態の雨水貯留装置の全体側面図、図２は同雨水貯留装置の分流器の全体斜視図、図３は図２中のＡ−Ａ線断面図、図４は図２中のＢ−Ｂ線断面図、図５及び図６は同雨水貯留装置の分流器が雨水を分流する様子を示す断面模式図、図７は同雨水貯留装置の分流器が貯留タンクの余分な雨水を排水路へ越流させる様子を示す断面模式図である。
【００１４】
本実施形態の雨水貯留装置は、図１に示すように、建物Ｈの屋根に降った雨水を集水する周知の雨樋Ｇ・Ｇ′の途中に接続された分流器１と、この分流器１に接続された貯留タンク２とから構成されている。
【００１５】
本実施形態の分流器１は、図２に示すように、中空成形法によりポリエチレン樹脂で一体成形されており、雨樋Ｇから雨水を導入する角形管状の導入路10と、この導入路10の下方で二股に分岐した角形管状の排水路11および集水路12とから構成されている。この分流器１の導入路10の端部10ａには上方の雨樋Ｇが着脱自在に接続され、排水路11の端部11ａには下方の雨樋Ｇ′が着脱自在に接続され、集水路12の端部12ａには後述する貯留タンク２が着脱自在に接続されるのである。
【００１６】
この分流器１の内面には、図２及び図５に示すように、排水路11と集水路12との分岐部分に、集水路12の方へ差し懸かるごとく突出した分流凸部13が形成されていると共に、この分流凸部13の上方には、当該分流凸部13とは反対方向へ相向いに差し向かうごとく突出した整流凸部14が形成されている。なお、図中、符号13ａ・14ａで指示するものは、これら分流凸部13および整流凸部14の各々を補強するために分流器１の導入路外面に形成した凹陥リブであり、これら凹陥リブ13ａ・14ａの導入路内面側が分流凸部13と整流凸部14とを形成している。
【００１７】
また、この分流器１の内面の分岐部には、図２及び図３に示すように、排水路11と集水路12とに分岐する当該導入路10の雨水流路を挟む路壁内面に、排水路11側の側端部15ａが低くて集水路12側の側端部15ｂが高い傾斜状の誘導凸部15が形成されている。この誘導凸部15によって、分岐部の側面を伝う初期雨水を排水路11方向へ誘導するのである。なお、本実施形態では、分流器１の分流凸部13を挟む角形管状の導入路10の内壁面両側に、互いに対向するごとく誘導凸部15・15が形成してある。
【００１８】
更にまた、この分流器１の分岐部の下方には、図２及び図５に示すように、集水路12と排水路11とを連通する越流路16が形成されていると共に、この越流路16の内側面には、図２及び図４に示すように、互いに対向し合う計二対の鉛直棒状の補助凸部17・17、18・18が形成されている。これら補助凸部17・17、18・18によって、汚れた初期雨水が越流路16の内側面を伝って集水路12側へ流れるのを防ぐと共に、きれいな雨水が越流路16の内側面を伝って排水路11側へ流れるのを防ぐのである。
【００１９】
一方、本実施形態の貯留タンク２は、中空成形法によってポリエチレン樹脂で一体成形されて箱型に構成されており、図１に示すように、タンク本体の両側には各々、上下一対の連結口20・20…が突設されていて、隣り合う貯留タンク２・２の連結口20・20・…同士が連結管３によって分離可能に連結されている。このように、本実施形態の雨水貯留装置は、必要に応じて、複数の貯留タンク２を連結して雨水貯留量を適宜に増減することができるのである。なお、この貯留タンク２の連結口20には、図示しないフィルタが装着されており、タンク内へのゴミの流入や蚊等の侵入を防いでいる。
【００２０】
また、この貯留タンク２の底部には、水抜栓21が設けられていて、タンク内の貯留雨水を完全に抜くことができる。このことにより貯留タンク２内に溜まったゴミや塵埃を簡単に取り除くことができ、冬期間の貯留雨水の凍結を防止する。なお、図中、符号22で指示するものは、タンク上部に設けられた上部栓であり、符号23で指示するものは、槽内の水位を目視するためのタンク内と連通した水位計であり、符号24で指示するものは、最端の貯留タンク２の連結口20に取り付けられた取水コックである。
【００２１】
しかして、本実施形態の雨水貯留装置は、雨樋Ｇに接続した分流器１によって塵埃を多く含んだ降り始めの初期雨水を排除して、それ以後のきれいな雨水を貯留タンク２に貯留し、そして、この貯留タンク２が満杯になったときには余分な雨水を排水路へ流出させるのである。
【００２２】
つまり、降り始めの初期雨水は、一般的に、その降雨強度（mm／時）が小さく、分流器１の導入路10に流入する雨水流量も小さいので（例えば、１リットル／分以下）、図５に示すように、初期雨水Ｗ1 は整流凸部14で整流されて下方に位置する分流凸部13の先端寄りに流れ落ち当該分流凸部を低い水位で流下して分流凸部13の端縁から排水路11へ流れ落ち、当該排水路11を流下して雨樋Ｇ′へ排水される。こうして、塵埃を多く含んだ降り始めの汚れた初期雨水Ｗ1 は排水路11を通じて排水されるのである。なお、このとき分岐部の側面を伝って集水路12側へ流れ込もうとする初期雨水は、誘導凸部15・15によっても排水路11方向へ誘導されるので、初期雨水Ｗ1 は確実に排水路11へ排水されるのである。
【００２３】
これに対し、雨が本降りになって導入路10を流れる雨水流量が大きくなると（例えば、１リットル／分以上）、図６に示すように、この流量の大きい本降り雨水Ｗ2 は整流凸部14を流下して分流凸部13の根元寄りに流れ落ち、当該分流凸部の斜面を高い水位で滑降して流下慣性を得て勢いよく集水路12に注ぎ込ませることになる。こうして、初期雨水の後のきれいになった本降り雨水Ｗ2 は集水路12を通じて貯留タンク２に貯められる。なお、このとき、越流路16の内壁面に形成された補助凸部18・18の誘導作用により、きれいな本降り雨水Ｗ2 が当該越流路16を通じて排水路11側へ漏れてしまうこともない。
【００２４】
そして、貯留タンク２に雨水が貯められてこの貯留タンク２が満杯になったときには、図７に示すように、タンクを溢れた余分な雨水Ｗ3 は、分流器１の越流路16を通じて排水路11へ排水できるのである。
【００２５】
このように、本実施形態の雨水貯留装置は、分流器１によって塵埃を多く含んだ初期雨水とそれ以後のきれいな雨水とをその流量差を利用して分流することができるので、従来品の如く、塵埃を多く含み、酸性度も高めの初期雨水によってタンク内に貯留している雨水が汚れてしまうような不都合もなく、またタンク内にすぐに塵埃が溜まって頻繁に清掃しなければならないなどの難点もない。
【００２６】
また、この分流器１には、排水路11と集水路12との分岐部に、排水路11側の側端部15ａが下がり、集水路12側の側端部15ｂが上がった誘導凸部15が形成されているので、この分岐部の側面を伝って集水路12側へ流れ込もうとする初期雨水を排水路11方向へ誘導することができ、雨水流量が小さい初期雨水を確実に排水路11へ排除することができる。
【００２７】
また、この分流器１には、集水路12と排水路11とを連通する越流路16が設けられているので、貯留タンク２が満杯になったときの余分な雨水を、初期雨水を排水するための排水路11を利用して流出させることができ、貯留タンク２には何らの排水機構も付加する必要がない。したがって、貯留タンク２の構造をその分、簡素化することができ、安価な雨水貯留装置を提供することが可能なのである。
【００２８】
また、本実施形態の雨水貯留装置は、分流器１及び貯留タンク２が構造簡素で合成樹脂にて一体成形されており、しかも、分流器１を雨樋から簡単に取り外すことができると共に、分流器１と貯留タンク２とも簡単に分離することができるので、これらの清掃を容易に行うことができ、メンテナンスも頗る容易である。
【００２９】
更にまた、本実施形態の雨水貯留装置にあっては、貯留タンク２同士を連結することができるので、必要に応じて、複数の貯留タンク２を連結して雨水貯留量を適宜に増減することができる。
【００３０】
【発明の効果】
以上、実施形態をもって説明したとおり、本発明に係る雨水貯留装置にあっては、分流器内面の分流凸部によって、塵埃を多く含んだ初期雨水とそれ以後のきれいな雨水とをその流量差を利用して分流することができるので、従来品の如く塵埃を多く含み、酸性度も高めの初期雨水によってタンク内に貯留している雨水が汚れてしまうような不都合もなく、またタンク内にすぐに塵埃が溜まって頻繁に清掃しなければならない難点もない。
【００３１】
また、この分流器には、排水路と集水路との分岐部に、排水路側の側端部が下がり、集水路側の側端部が上がった誘導凸部が形成されているので、この分岐部の側面を伝って集水路側へ流れ込もうとする初期雨水を排水路方向へ誘導することができ、雨水流量が小さい初期雨水を確実に排水路へ排除することができるのである。
【図面の簡単な説明】
【図１】 本実施形態の雨水貯留装置の全体側面図である。
【図２】 同雨水貯留装置の分流器の全体斜視図である。
【図３】 図２中のＡ−Ａ線断面図である。
【図４】 図２中のＢ−Ｂ線断面図である。
【図５】 同雨水貯留装置の分流器が雨水を分流する様子を示す断面模式図である。
【図６】 同雨水貯留装置の分流器が雨水を分流する様子を示す断面模式図である。
【図７】 同雨水貯留装置の分流器が貯留タンクの余分な雨水を排水路へ越流させる様子を示す断面模式図である。
【符号の説明】
１ 分流器
11 排水路
12 集水路
13 分流凸部
13ａ （分流凸部の）凹陥リブ
14 整流凸部
14ａ （整流凸部の）凹陥リブ
15 誘導凸部
15ａ （誘導凸部15の排水路11側の）側端部
15ｂ （誘導凸部15の集水路12側の）側端部
16 越流路
２ 貯留タンク
Ｇ・Ｇ′ 雨樋
Ｗ1 ・Ｗ2 雨水[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a rainwater storage device, and more particularly to a rainwater storage device capable of removing initial rainwater at the beginning of falling, which contains a lot of dust, and storing clean rainwater thereafter.
[0002]
[Prior art]
Conventionally, rainwater that has fallen on the roof or roof of a building is stored in a storage tank, and this rainwater is effectively used as domestic water. However, the conventional rainwater storage device simply connects the rain gutter disposed on the roof and the storage tank, and has a structure that collects all rainwater in the storage tank. The initial rainwater that began to fall, which contained a lot of water, was also collected in the tank, and the stored rainwater became dirty, and dust accumulated in the tank immediately and had to be frequently cleaned.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described drawbacks of the conventional rainwater storage device, eliminates dirty initial rainwater that begins to descend and contains a lot of dust, and clean water after that. It is a technical problem to provide a rainwater storage device that can store water in a tank and has a simple structure and is easily disassembled.
[0004]
Another technical problem of the present invention is to provide a rainwater storage device that can reliably remove dirty initial rainwater that starts to fall and contains a lot of dust to the drainage channel.
[0005]
Another technical problem of the present invention is to provide a rainwater storage device capable of allowing excess rainwater to flow toward the drainage channel from which initial rainwater has been removed when the storage tank is full. is there.
[0006]
In addition, another technical problem of the present invention is to provide an easy-to-maintain rainwater storage device that can be easily cleaned by removing a diverter that diverts rainwater into dirty initial rainwater and clean rainwater from the gutter. It is in.
[0007]
Furthermore, the other technical subject of this invention is providing the rainwater storage apparatus which can increase / decrease the rainwater storage amount suitably.
[0008]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention provides:
A shunt 1 connected to a rain gutter G through which rainwater flows and internally branched into a drainage channel 11 and a catchment channel 12 and a storage tank 2 connected to the catchment channel 12 of the shunt 1 and storing rainwater A rainwater storage device,
The shunt 1 includes an introduction channel 10 formed into a rectangular tube, except for a portion of the introduction end portion 10a connected to the gutter G, and a rectangular tubular drainage channel that is bifurcated below the introduction channel 10. 11 and while Ru and a water collecting route 12, the reservoir the flow divider 1 is said below the branch section that branches into two is formed overflow channel 16 which communicates the drainage channel 11 and the condensing water channel 12 tank 2 Ri drainable der excess rainwater during full to drainage 11, and the inner surface of the flow divider 1 that branches to the the drainage channel 11 and the water collecting route 12 diverted protruding toward the water collecting route 12 A convex portion 13 is formed, and a rectifying convex portion 14 is formed above the diverting convex portion 13 so as to protrude in a direction opposite to the diverting convex portion 13 and through the introduction end portion 10a. that rainwater flowing from the gutter G can be configured to flow down the said shunt projection 13 of the feed path 10 and the rectifying protrusion 14 The
When the amount of rainwater flowing into the water separator 1 is small and the water level of the rainwater W 1 flowing down the rectifying convex portion 14 and the diverting convex portion 13 is low, the rainwater W 1 flows from the edge of the diverting convex portion 13 to the drainage channel 11. drained by the Maseru write,
When the amount of rainwater flowing into the diverter 1 increases and the water level of the rainwater W 2 flowing down the rectifying convex portion 14 and the diverting convex portion 13 becomes high, the rainwater W 2 gains the flowing inertia and vigorously enters the collecting channel 12. It is characterized in that it is configured to collect water by pouring.
[0009]
Further, in order to solve the above-mentioned problems, the present invention adds drainage to the inner surface of the road wall sandwiching the rainwater flow path of the introduction path 10 that branches into the drainage path 11 and the water collection path 12 in addition to the above means as necessary. A technical means was adopted in which an inclined guide convex portion 15 having a low side end 15a on the side of the channel 11 and a high side end 15b on the side of the water collecting channel 12 was formed.
[0010]
[0011]
Further, in order to solve the above-described problems, the present invention provides a technology in which, in addition to the above-described means, the shunt 1 is integrally formed of a synthetic resin and is detachable from the gutter G. Adopted the means.
[0012]
Furthermore, in order to solve the above-described problems, the present invention employs technical means that a plurality of storage tanks 2 are connected in a separable manner in addition to the above-described means.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a rainwater storage device according to the present invention will be described in detail based on an embodiment shown in the accompanying drawings. 1 is an overall side view of the rainwater storage device of the present embodiment, FIG. 2 is an overall perspective view of the shunt of the rainwater storage device, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. FIG. 5 and FIG. 6 are schematic cross-sectional views showing a state in which the diverter of the rainwater storage device diverts rainwater, and FIG. 7 is an extra storage tank in the diverter of the rainwater storage device. It is a cross-sectional schematic diagram which shows a mode that a storm water overflows to a drainage channel.
[0014]
As shown in FIG. 1, the rainwater storage device of this embodiment includes a shunt 1 connected in the middle of a well-known rain gutter G · G ′ that collects rainwater that has fallen on the roof of a building H, and the shunt 1 and a storage tank 2 connected to 1.
[0015]
As shown in FIG. 2, the shunt 1 of the present embodiment is integrally formed of a polyethylene resin by a hollow molding method, and includes a rectangular tubular introduction path 10 for introducing rainwater from a gutter G, and the introduction path 10. It is composed of a rectangular tubular drainage channel 11 and a water collecting channel 12 that are bifurcated downward. An upper gutter G is detachably connected to the end 10a of the introduction channel 10 of the flow divider 1, and a lower gutter G 'is detachably connected to the end 11a of the drainage channel 11. A storage tank 2, which will be described later, is detachably connected to the 12 end portions 12a.
[0016]
As shown in FIGS. 2 and 5, on the inner surface of the flow divider 1, a branching convex portion 13 is formed at a branching portion between the drainage channel 11 and the catchment channel 12 so as to protrude toward the catchment channel 12. At the same time, a rectifying convex portion 14 is formed above the diverting convex portion 13 so as to protrude in the opposite direction to the diverting convex portion 13. In the figure, what is indicated by reference numerals 13a and 14a are recessed ribs formed on the outer surface of the introduction path of the flow divider 1 in order to reinforce each of the flow dividing convex portion 13 and the rectifying convex portion 14. The inner surface side of the introduction passages 13a and 14a forms a branching convex portion 13 and a rectifying convex portion 14.
[0017]
Further, as shown in FIGS. 2 and 3, the branch portion of the inner surface of the flow divider 1 is formed on the inner surface of the road wall that sandwiches the rainwater flow path of the introduction path 10 that branches into the drainage path 11 and the water collection path 12. An inclined guide convex portion 15 is formed which has a low side end portion 15a on the drainage channel 11 side and a high side end portion 15b on the water collection channel 12 side. By this guiding convex portion 15, the initial rainwater that travels along the side surface of the branching portion is guided toward the drainage channel 11. In the present embodiment, guide convex portions 15 and 15 are formed on both sides of the inner wall surface of the rectangular tubular introduction path 10 sandwiching the flow dividing convex portion 13 of the flow divider 1 so as to face each other.
[0018]
Furthermore, as shown in FIGS. 2 and 5, an overflow channel 16 that connects the water collection channel 12 and the drainage channel 11 is formed below the branch portion of the flow divider 1. As shown in FIGS. 2 and 4, a total of two pairs of vertical rod-like auxiliary convex portions 17, 17, 18, 18 facing each other are formed on the inner surface of the path 16. These auxiliary projections 17, 17, 18, and 18 prevent dirty initial rainwater from flowing along the inner surface of the overflow channel 16 to the catchment channel 12 side, and clean rainwater on the inner surface of the overflow channel 16 It is prevented from flowing to the drainage channel 11 side.
[0019]
On the other hand, the storage tank 2 of the present embodiment is integrally formed of polyethylene resin by a hollow molding method and is configured in a box shape. As shown in FIG. 1, a pair of upper and lower connection ports are provided on both sides of the tank body. Are connected so as to be separable by a connecting pipe 3. The connecting ports 20, 20... Of adjacent storage tanks 2, 2. As described above, the rainwater storage device of the present embodiment can increase or decrease the rainwater storage amount appropriately by connecting a plurality of storage tanks 2 as necessary. A filter (not shown) is attached to the connection port 20 of the storage tank 2 to prevent inflow of dust and mosquitoes from entering the tank.
[0020]
Further, a water drain plug 21 is provided at the bottom of the storage tank 2 so that the stored rainwater in the tank can be completely removed. This makes it possible to easily remove dust and dust collected in the storage tank 2 and prevent the stored rainwater from freezing in winter. In the figure, what is indicated by reference numeral 22 is an upper stopper provided at the upper part of the tank, and what is indicated by reference numeral 23 is a water level meter that communicates with the inside of the tank for visually checking the water level in the tank. The reference numeral 24 indicates a water intake cock attached to the connection port 20 of the outermost storage tank 2.
[0021]
Thus, the rainwater storage device of the present embodiment eliminates initial rainwater that begins to fall and contains a lot of dust by the shunt 1 connected to the gutter G, and stores clean rainwater after that in the storage tank 2. And when this storage tank 2 becomes full, excess rainwater is discharged to a drainage channel.
[0022]
That is, the initial rainwater at the beginning of falling generally has a low rainfall intensity (mm / hour) and a small amount of rainwater flowing into the introduction path 10 of the flow divider 1 (for example, 1 liter / minute or less). As shown in FIG. 5, the initial rain water W 1 is rectified by the rectifying convex portion 14 and flows down toward the tip of the diverting convex portion 13 located below, and flows down the diverting convex portion at a low water level to the edge of the diverting convex portion 13 The water flows down to the drainage channel 11, flows down the drainage channel 11, and is drained to the rain gutter G '. Thus, the dirty initial rainwater W 1 that starts to fall and contains a lot of dust is drained through the drainage channel 11. At this time, the initial rainwater that is going to flow into the catchment channel 12 side along the side of the branch portion is also guided to the drainage channel 11 direction by the guide convex portions 15 and 15, so the initial rainwater W 1 is surely It is drained into the drainage channel 11.
[0023]
In contrast, when the rainwater flow through the feed path 10 by the rain becomes regular rainfall increases (e.g., 1 liter / min or more), as shown in FIG. 6, a large regular rainfall rainwater W 2 of the flow rectifying protrusion 14 , And flows down to the base of the diverting convex portion 13, and descends the slope of the diverting convex portion at a high water level to obtain the flowing inertia and vigorously pour it into the water collecting channel 12. Thus, the main rainwater W 2 that has been cleaned after the initial rainwater is stored in the storage tank 2 through the catchment channel 12. At this time, clean main rainwater W 2 does not leak to the drainage channel 11 side through the overflow channel 16 by the guiding action of the auxiliary convex portions 18 and 18 formed on the inner wall surface of the overflow channel 16. .
[0024]
Then, when rainwater is stored in the storage tank 2 and the storage tank 2 becomes full, as shown in FIG. 7, excess rainwater W 3 overflowing the tank is drained through the overflow channel 16 of the flow divider 1. It can drain to Road 11.
[0025]
As described above, the rainwater storage device according to the present embodiment can divert the initial rainwater containing a lot of dust and the clean rainwater after that using the flow divider 1 by utilizing the difference in flow rate. There is no inconvenience that the rainwater stored in the tank is contaminated by the initial rainwater containing a lot of dust and high acidity, and the dust immediately accumulates in the tank and must be cleaned frequently. There are no difficulties.
[0026]
Further, in this diverter 1, a guiding convex portion 15 in which a side end portion 15a on the drainage channel 11 side is lowered and a side end portion 15b on the water collection channel 12 side is raised at a branch portion between the drainage channel 11 and the water collection channel 12 is provided. Therefore, it is possible to guide the initial rainwater that is going to flow into the catchment channel 12 side along the side of this branching part toward the drainage channel 11, and reliably drain the initial rainwater with a small rainwater flow rate. 11 can be eliminated.
[0027]
The shunt 1 is also provided with an overflow channel 16 that connects the catchment channel 12 and the drainage channel 11, so that excess rainwater when the storage tank 2 is full is drained from the initial rainwater. Therefore, it is possible to cause the drainage to flow out by using the drainage channel 11, and it is not necessary to add any drainage mechanism to the storage tank 2. Therefore, the structure of the storage tank 2 can be simplified correspondingly, and an inexpensive rainwater storage device can be provided.
[0028]
Further, in the rainwater storage device of this embodiment, the flow divider 1 and the storage tank 2 are simple in structure and are integrally formed of synthetic resin, and the flow divider 1 can be easily detached from the rain gutter, and the flow is divided. Since the container 1 and the storage tank 2 can be easily separated from each other, they can be easily cleaned and maintenance is easy.
[0029]
Furthermore, in the rainwater storage device of the present embodiment, the storage tanks 2 can be connected to each other. Therefore, if necessary, a plurality of storage tanks 2 are connected to appropriately increase or decrease the amount of rainwater storage. Can do.
[0030]
【The invention's effect】
As described above with the embodiment, in the rainwater storage device according to the present invention, the flow difference between the initial rainwater containing a lot of dust and the clean rainwater after that is used by the shunt convex portion on the inner surface of the shunt. Therefore, there is no inconvenience that the rainwater stored in the tank is contaminated by the initial rainwater that contains a lot of dust and has a high acidity as in the conventional product. There is no problem that dust accumulates and must be cleaned frequently.
[0031]
In addition, in this shunt, a guiding convex portion is formed at the branch portion between the drainage channel and the catchment channel, with the side end portion on the drainage channel side lowered and the side end portion on the catchment channel side raised. Therefore, it is possible to guide the initial rainwater to flow into the drainage channel through the side surface of the section in the direction of the drainage channel, and to reliably exclude the initial rainwater having a small rainwater flow rate to the drainage channel.
[Brief description of the drawings]
FIG. 1 is an overall side view of a rainwater storage apparatus according to an embodiment.
FIG. 2 is an overall perspective view of a shunt of the rainwater storage device.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
4 is a sectional view taken along line BB in FIG. 2. FIG.
FIG. 5 is a schematic cross-sectional view showing a state in which the flow divider of the rainwater storage device diverts rainwater.
FIG. 6 is a schematic cross-sectional view showing a state in which the flow divider of the rainwater storage device diverts rainwater.
FIG. 7 is a schematic cross-sectional view showing a state in which the shunt of the rainwater storage device causes excess rainwater in the storage tank to overflow into the drainage channel.
[Explanation of symbols]
1 shunt
11 Drainage channel
12 Catchment channel
13 Shunt convexity
13a Recessed rib
14 Rectification convex part
14a Recessed rib (of rectifying convex part)
15 Guide convex
15a Side end (on the drainage channel 11 side of the guide projection 15)
15b Side edge (on the catchment channel 15 side of the catchment channel 12)
16 Overflow channel 2 Storage tanks G and G 'Rain gutter W 1 and W 2 Rainwater

Claims (4)

雨水が流れる雨樋に接続され、内部で排水路と集水路とに分岐した分流器と、この分流器の集水路に接続され、雨水を貯留する貯留タンクとから成る雨水貯留装置であって、この分流器は、雨樋に接続される導入端部の部分を除いて、角形管状に成形された導入路と、この導入路の下方で二股に分岐した角形管状の排水路および集水路とを備える一方、この分流器が前記二股に分岐する当該分岐部の下方には前記集水路と排水路とを連通する越流路が形成されて前記貯留タンクが満杯時の余剰雨水を排水路へ排水可能であり、かつ、この排水路と集水路とに分岐する当該分流器の内面には集水路へ向けて突出した分流凸部が形成されていると共に、この分流凸部の上方には当該分流凸部とは反対方向へ相向いに差し向かうごとく突出した整流凸部を形成して導入端部を通じ雨樋から流入する雨水が導入路の前記分流凸部と整流凸部とを流下するように構成することにより、分水器に流れ込む雨水量が小さくて整流凸部および分流凸部を流下する雨水の水位が低いときには、当該雨水が分流凸部の端縁から排水路へ流れ込ませることによって排水させ、分水器に流れ込む雨水量が大きくなり整流凸部および分流凸部を流下する雨水の水位が高くなったときには、当該雨水が流下慣性を得て勢いよく集水路に注ぎ込むことによって集水可能にしたことを特徴とする雨水貯留装置。A rainwater storage device comprising a shunt connected to a rain gutter through which rainwater flows and internally branched into a drainage channel and a water collection channel, and a storage tank connected to the water collection channel of the flow divider and storing rainwater, This shunt has an introduction channel formed into a rectangular tube, except for the portion of the introduction end connected to the rain gutter, and a rectangular tubular drainage channel and a water collecting channel that are bifurcated under the introduction channel. On the other hand, an overflow channel that connects the water collecting channel and the drainage channel is formed below the bifurcated portion where the diverter branches into the bifurcated portion, and drains excess rainwater when the storage tank is full to the drainage channel. A shunting convex portion projecting toward the water collecting channel is formed on the inner surface of the shunt that branches into the drainage channel and the water collecting channel, and above the shunting convex portion, the shunting flow is formed. Rectification that protrudes in the opposite direction to the convex part By parts is rainwater flowing from the rain gutter through the input end to form a configured to flow down the said diversion protrusion of the introduction path and the rectifying protrusion, rectification convex small rainwater amount flowing into the water separator When the water level of the rainwater flowing down the head and the shunting convex portion is low, the rainwater is drained by flowing into the drainage channel from the edge of the shunting convex portion, and the amount of rainwater flowing into the water separator increases, so that the rectifying convex portion and the shunting flow A rainwater storage device characterized in that, when the level of rainwater flowing down a convex portion becomes high, water can be collected by obtaining the inertia of the rainwater and pouring it into the water collecting channel vigorously. 排水路と集水路とに分岐する当該導入路の雨水流路を挟む路壁内面に、排水路側の側端部が低くて集水路側の側端部が高い傾斜状の誘導凸部が形成されていることを特徴とする請求項１記載の雨水貯留装置。  On the inner surface of the road wall that sandwiches the rainwater flow path of the introduction path that branches into the drainage channel and the catchment channel, an inclined guiding convex portion is formed with a lower side end on the drainage channel side and a higher side end on the catchment channel side. The rainwater storage device according to claim 1, wherein 分流器が合成樹脂にて一体成形されており、雨樋に対し着脱自在に構成されていることを特徴とする請求項１又は２に記載の雨水貯留装置。The rainwater storage device according to claim 1 or 2 , wherein the shunt is integrally formed of a synthetic resin and is detachable from the rain gutter. 複数の貯留タンクが分離可能に連結されていることを特徴とする請求項１〜請求項３の何れか一つに記載の雨水貯留装置。Rainwater storage device according to any one of claims 1 to 3 in which a plurality of the storage tank is characterized in that it is connected detachably.
JP30841999A 1999-10-29 1999-10-29 Rainwater storage device Expired - Fee Related JP3676149B2 (en)

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