JP5080534B2 - Rainwater storage tank - Google Patents

Rainwater storage tank Download PDF

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JP5080534B2
JP5080534B2 JP2009151185A JP2009151185A JP5080534B2 JP 5080534 B2 JP5080534 B2 JP 5080534B2 JP 2009151185 A JP2009151185 A JP 2009151185A JP 2009151185 A JP2009151185 A JP 2009151185A JP 5080534 B2 JP5080534 B2 JP 5080534B2
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rainwater
tank body
tank
storage tank
support
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JP2011006911A (en
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光久 藤野
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial 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

本発明は、雨水貯留タンクに関する。   The present invention relates to a rainwater storage tank.

従来、雨水貯留タンクは、その前面の下部に取水口としてのＬ字状の蛇口を水平方向に突出させて設けている（例えば、特許文献１参照）。このような構成の雨水貯留タンクは、蛇口がＬ字状に折れ曲がっていることにより、水圧の損失が生じ、充分な流量の雨水が得られないという課題があった。また、利用者が雨水貯留タンクの前面に設けた蛇口からじょうろやバケツ等の容器に直接給水するためには、前記容器が配置可能なスペースを蛇口下方に確保する必要があり、そのために雨水貯留タンクをブロック等の台座の上に設置しなければならなかった。   Conventionally, a rainwater storage tank is provided with an L-shaped faucet as a water intake protruding in the horizontal direction at the lower part of the front surface thereof (see, for example, Patent Document 1). The rainwater storage tank having such a configuration has a problem in that the faucet is bent in an L shape, resulting in a loss of water pressure and the inability to obtain a sufficient amount of rainwater. In addition, in order for a user to supply water directly to a container such as a watering can or a bucket from a faucet provided at the front of the rainwater storage tank, it is necessary to secure a space in which the container can be placed below the faucet. The tank had to be installed on a base such as a block.

特開平１１−３２４０３１公報JP 11-324031 A

本発明は以上の通りの事情に鑑みてなされたものであり、取水口の水圧の損失を低減でき、設置が容易な雨水貯留タンクを提供することを課題としている。   This invention is made | formed in view of the situation as mentioned above, and makes it the subject to provide the rainwater storage tank which can reduce the loss of the water pressure of a water intake, and is easy to install.

本発明は以下のことを特徴としている。   The present invention is characterized by the following.

第１には、竪樋から雨水を導入する雨水導入口、導入した雨水を取り出す取水口、及び過剰に導入された雨水を排水するオーバーフロー用排水口を有するタンク本体と、タンク本体を支持する筒状の支持体とを備え、支持体の前面は、凹面を有し、支持体の前方に凹みを形成しており、タンク本体の底面に、支持体前方の凹みに臨む取水口が下方に突出して設けられている。   First, a tank body having a rainwater introduction port for introducing rainwater from a gutter, a water intake port for taking out the introduced rainwater, an overflow drainage port for draining excessively introduced rainwater, and a cylinder supporting the tank body The front surface of the support body has a concave surface, and a recess is formed in front of the support body. A water intake port facing the recess in front of the support body projects downward on the bottom surface of the tank body. Is provided.

第２には、第１の発明において、支持体に嵌挿される筒状の案内部がタンク本体の底面に形成されている。   Second, in the first invention, a cylindrical guide portion to be fitted into the support is formed on the bottom surface of the tank body.

第１の発明によれば、タンク本体の底面に雨水の取水口が突出して設けられているので、Ｌ字状に折れ曲がっている従来の蛇口と比較して水圧の損失を低減して取水口から雨水を効果的に取り出すことができる。また、タンク本体内部の残水を最小限にとどめて取水口から雨水を取り出すことができるので、タンク内の雨水を有効に利用することができる。さらに、支持体の前方に凹みが形成され、その凹みに臨むように取水口が設けられているので、取水口の下方にじょうろやバケツ等の容器を配置して取水口から雨水を容器に直接給水することが可能である。したがって、じょうろやバケツ等の容器が使える高さと位置にブロック等を水平に積み上げて台座を組む等の雨水貯留タンクの足場を整えることが不要になり、設置が容易になる。   According to the first invention, since the rainwater intake is provided so as to protrude from the bottom surface of the tank body, the loss of water pressure is reduced as compared with the conventional faucet bent in an L shape. Rain water can be taken out effectively. Moreover, since rainwater can be taken out from the water intake port while keeping the residual water inside the tank body to a minimum, the rainwater in the tank can be used effectively. In addition, a depression is formed in front of the support, and a water intake is provided so as to face the depression, so a container such as a watering can or a bucket is placed below the water intake, and rainwater is directly passed from the intake to the container. It is possible to supply water. Therefore, it is not necessary to prepare a scaffold for the rainwater storage tank such as horizontally stacking blocks at a height and position where a container such as a watering can or a bucket can be used, and installation is facilitated.

第２の発明によれば、上記第１の発明の効果に加え、タンク本体の底面に設けられた支持体に嵌挿される筒状の案内部によって、支持体とタンク本体との間にずれを生じさせることなく両者の連結が容易になる。また、雨水貯留タンクを地面に設置している状態においては、振動、風雨等によるタンク本体のずれ、脱落等を防止し、確実な連結が実現される。   According to the second invention, in addition to the effect of the first invention, the cylindrical guide portion fitted into the support body provided on the bottom surface of the tank body causes a shift between the support body and the tank body. It is easy to connect the two without causing them. In addition, in a state where the rainwater storage tank is installed on the ground, the tank body is prevented from being displaced or dropped due to vibration, wind and rain, etc., and a reliable connection is realized.

本発明の雨水貯留タンクの一実施形態を示した斜視図である。It is the perspective view which showed one Embodiment of the rainwater storage tank of this invention. 図１の雨水貯留タンクの設置状態を示した背面図である。It is the rear view which showed the installation state of the rainwater storage tank of FIG. 図１の雨水貯留タンクの分解斜視図である。It is a disassembled perspective view of the rainwater storage tank of FIG.

図１は、本発明の雨水貯留タンクの一実施形態を示した斜視図であり、図２は、図１の雨水貯留タンクの設置状態を示した背面図である。   FIG. 1 is a perspective view showing an embodiment of the rainwater storage tank of the present invention, and FIG. 2 is a rear view showing an installation state of the rainwater storage tank of FIG.

本実施形態の雨水貯留タンク１は、竪樋３０からの雨水を貯留するタンク本体２と、このタンク本体２を支持する筒状の支持体２０を備え、支持体２０の上部にタンク本体２が連結される。   The rainwater storage tank 1 according to the present embodiment includes a tank body 2 that stores rainwater from the eaves 30 and a cylindrical support body 20 that supports the tank body 2, and the tank body 2 is disposed above the support body 20. Connected.

タンク本体２は、前面６ａと後面６ｄが平板形状を有し左右両側面６ｂ，６ｃが断面視半円形状の凸面を有する周側壁６と、平板形状の天板８及び底板７とで構成される樹脂成形品であり、断面視略楕円形状を有している。タンク本体２の天板８が蓋９となっており、周側壁６と底板７とよりなる上方に開口する有底筒状体の開口部分を被閉する。蓋９を取り外すことにより、タンク本体２内部を洗浄することができる。   The tank body 2 is composed of a peripheral side wall 6 having a front surface 6a and a rear surface 6d having a flat plate shape and left and right side surfaces 6b and 6c having a semicircular convex shape in cross section, a flat plate top plate 8 and a bottom plate 7. The resin molded product has a substantially elliptical shape in cross section. A top plate 8 of the tank main body 2 serves as a lid 9 and closes an opening portion of the bottomed cylindrical body that is opened upward and includes the peripheral side wall 6 and the bottom plate 7. By removing the lid 9, the inside of the tank body 2 can be cleaned.

タンク本体２の底面２ａには、後述する支持体２０前方の凹み２２に臨むように左右方向の略中央、前側に、タンク本体２内部と連通する長筒状の取水口４が底板７に略垂直に下方に突出して設けられており、コック１０を開けることによりタンク本体２内部の雨水を取り出せるようになっている。   On the bottom surface 2 a of the tank body 2, a long cylindrical water intake port 4 that communicates with the inside of the tank body 2 is formed on the bottom plate 7 at the substantially center and front side in the left-right direction so as to face a dent 22 in front of the support 20 described later. It is provided so as to protrude vertically downward, and the rain water inside the tank body 2 can be taken out by opening the cock 10.

タンク本体２の底面２ａには、さらにタンク本体２内部の雨水を排水するドレン１１（図３に図示）が設けられており、タンク本体２の水抜きを可能にしている。   A drain 11 (shown in FIG. 3) for draining rainwater inside the tank body 2 is further provided on the bottom surface 2a of the tank body 2 so that the tank body 2 can be drained.

タンク本体２の周側壁６の後面６ｄ上部には、背面側からみて右側に雨水導入口３が設けられ、左側にオーバーフロー用排水口５が設けられている。雨水導入口３はホース３１等の管を介して住宅の雨水流入系に連通されており、住宅の雨水流入系からタンク本体２に雨水が流れ込むようになっている。オーバーフロー用排水口５はホース３２等の管を介して住宅の雨水排水系に連通されており、タンク本体２の容量を超える雨水が雨水流入系からタンク本体２に流入した場合にはその過剰分の雨水がオーバーフロー用排水口５から雨水排水系に排水されるようになっている。本実施形態では、住宅の雨水流入系及び雨水排水系を竪樋３０として構成している。   In the upper part of the rear surface 6d of the peripheral side wall 6 of the tank body 2, a rainwater introduction port 3 is provided on the right side as viewed from the back side, and an overflow drainage port 5 is provided on the left side. The rainwater introduction port 3 communicates with a rainwater inflow system of a house through a pipe such as a hose 31 so that rainwater flows into the tank body 2 from the rainwater inflow system of the house. The overflow drain port 5 is connected to the rainwater drainage system of the house through a pipe such as a hose 32. If rainwater exceeding the capacity of the tank body 2 flows into the tank body 2 from the rainwater inflow system, the excess amount Rainwater is drained from the overflow drain 5 into the rainwater drainage system. In the present embodiment, the rainwater inflow system and the rainwater drainage system of the house are configured as the eaves 30.

筒状の支持体２０は、前面２０ａが断面視半円形状の凹面２１を有し、後面２０ｄが平板形状を有し、左右両側面２０ｂ，２０ｃが断面視半円形状の凸面を有している。このものはタンク本体２と同種の樹脂成形品であってもよいし、比重が高く高強度の樹脂あるいは金属材料等の無機材料で構成されるものであってもよい。本実施形態では、支持体２０は、その断面において後面２０ｄ及び左右両側面２０ｂ，２０ｃに対応する外周部分がタンク本体２断面のそれと略一致するように形成されており、支持体２０とタンク本体２が連結した状態においては、支持体２０の後面２０ｄ及び左右両側面２０ｂ，２０ｃの各々がタンク本体２の周側壁６の後面６ｄ及び左右両側面６ｂ，６ｃと面一又は略面一とされている。支持体２０前面２０ａの凹面２１は、高さ方向に支持体２０の上端から下端まで連続しており、支持体２０の前方、タンク本体２下方に半円柱形の凹み２２を形成し、じょうろやバケツ等の容器の水受部の配置を可能にしている。上述したタンク本体２の取水口４は、この凹み２２に臨むように設けられている。支持体２０の高さは、じょうろやバケツ等の容器の水受部よりも高くなるように設定されており、支持体２０前方に配置した容器の水受部をタンク本体２の取水口４の下方に配置することができる。   The cylindrical support 20 has a front surface 20a having a concave surface 21 with a semicircular shape in cross section, a rear surface 20d having a flat plate shape, and left and right side surfaces 20b, 20c having convex surfaces having a semicircular shape in cross section. Yes. This may be a resin molded product of the same type as the tank body 2 or may be composed of an inorganic material having a high specific gravity and a high strength resin or a metal material. In the present embodiment, the support 20 is formed such that the outer peripheral portion corresponding to the rear surface 20d and the left and right side surfaces 20b, 20c substantially coincides with that of the cross section of the tank body 2 in the cross section. In the state where the two are connected, the rear surface 20d and the left and right side surfaces 20b, 20c of the support body 20 are flush or substantially flush with the rear surface 6d and the left and right side surfaces 6b, 6c of the peripheral side wall 6 of the tank body 2. ing. The concave surface 21 of the front surface 20a of the support body 20 is continuous in the height direction from the upper end to the lower end of the support body 20, and forms a semi-cylindrical recess 22 in front of the support body 20 and below the tank body 2. The arrangement of the water receiving part of a container such as a bucket is made possible. The water intake 4 of the tank body 2 described above is provided so as to face the recess 22. The height of the support 20 is set to be higher than the water receiving portion of the container such as a watering can or a bucket, and the water receiving portion of the container disposed in front of the support 20 is connected to the water intake 4 of the tank body 2. It can be placed below.

図３は、図１の雨水貯留タンクの分解斜視図である。   FIG. 3 is an exploded perspective view of the rainwater storage tank of FIG.

タンク本体２の底面２ａには、支持体２０に嵌挿される筒状の案内部１２が形成されている。この案内部１２は、支持体２０の内側形状に対応する形状及び大きさを有し、タンク本体２底面２ａの外周部１３の内側に垂直方向に突設されている。タンク本体２の案内部１２が支持体２０に嵌挿した状態において、支持体２０の上端２３がタンク本体２底面２ａの外周部１３に当接し、タンク本体２が支持体２０に支持される。このような案内部１２は、支持体２０との接続をより確実なものにするために、その高さが、例えば、支持体２０の全高に対して１／４程度もしくはそれ以上に設定されることが好ましい。   On the bottom surface 2 a of the tank body 2, a cylindrical guide portion 12 that is fitted into the support 20 is formed. The guide portion 12 has a shape and a size corresponding to the inner shape of the support 20, and protrudes in the vertical direction inside the outer peripheral portion 13 of the bottom surface 2 a of the tank body 2. In a state where the guide portion 12 of the tank body 2 is fitted into the support body 20, the upper end 23 of the support body 20 comes into contact with the outer peripheral portion 13 of the bottom surface 2 a of the tank body 2, and the tank body 2 is supported by the support body 20. In order to make the connection with the support body 20 more reliable, the height of the guide section 12 is set to about 1/4 or more with respect to the total height of the support body 20, for example. It is preferable.

次に、本実施形態の雨水貯留タンク１の使用方法について説明する。図２に示したように、本実施形態の雨水貯留タンク１は地面４０に設置されるが、その際に、例えば、支持体２０をまず地面４０に設置し、次いでタンク本体２の案内部１２を支持体２０に嵌挿させ、支持体２０の上にタンク本体２を載せるようにする。もちろん、支持体２０とタンク本体２を一体化した状態で地面４０に設置してもよい。タンク本体２の雨水導入口３にはホース３１の一端が接続され、他端は竪樋３０の途中に設けられた雨水分岐部材３３の分岐部３４に接続される。雨水分岐部材３３は、降雨時、竪樋３０内を流下する雨水の一部を分岐部３４から竪樋３０の外部に流出させるものであり、雨水は、雨水分岐部材３３の分岐部３４に接続されたホース３１を介してタンク本体２に自然流入し、貯留される。タンク本体２のオーバーフロー用排水口５にはホース３２の一端が接続され、他端は竪樋３０の雨水分岐部材３３の下流に設けられる雨水合流部材３５の合流部３６に接続される。雨水合流部材３５は、竪樋３０外部の雨水を竪樋３０内を流下する雨水に合流させるものであり、タンク本体２の容量を超える雨水がタンク本体２に導入されると、その過剰分の雨水がオーバーフロー用排水口５に接続されたホース３２を介して雨水合流部材３５の合流部３６から竪樋３０に排水される。タンク本体２に貯留された雨水は、コック１０を開いて開栓することにより取水口４から自然流出し、所望量の雨水をじょうろやバケツ等の容器に取り出すことができる。必要に応じて取水口４にホースを取り付けてもよく、この場合、雨水貯留タンク１から離れた庭への散水や洗車に便利である。   Next, the usage method of the rainwater storage tank 1 of this embodiment is demonstrated. As shown in FIG. 2, the rainwater storage tank 1 of the present embodiment is installed on the ground 40. At this time, for example, the support body 20 is first installed on the ground 40, and then the guide portion 12 of the tank body 2. Is inserted into the support 20 and the tank body 2 is placed on the support 20. Of course, you may install in the ground 40 in the state which integrated the support body 20 and the tank main body 2. FIG. One end of a hose 31 is connected to the rainwater introduction port 3 of the tank body 2, and the other end is connected to a branching portion 34 of a rainwater branching member 33 provided in the middle of the rod 30. The rainwater branching member 33 allows a part of the rainwater flowing down the raft 30 to flow out of the raft 30 to the outside of the raft 30 during rain. The rainwater is connected to the branching portion 34 of the rainwater branching member 33. Naturally flows into the tank body 2 through the hose 31 and is stored. One end of a hose 32 is connected to the overflow drain 5 of the tank body 2, and the other end is connected to a junction 36 of a rainwater junction member 35 provided downstream of the rainwater branching member 33 of the basin 30. The rainwater confluence member 35 joins rainwater outside the raft 30 to rainwater flowing down the raft 30, and when rainwater exceeding the capacity of the tank body 2 is introduced into the tank body 2, the excess amount Rainwater is drained from the junction 36 of the rainwater junction member 35 to the trough 30 via the hose 32 connected to the overflow drain 5. The rainwater stored in the tank body 2 naturally flows out from the water intake 4 by opening the cock 10 and opening it, and a desired amount of rainwater can be taken out into a container such as a watering can or a bucket. If necessary, a hose may be attached to the water intake 4, and in this case, it is convenient for watering the car away from the rainwater storage tank 1 or washing the car.

本実施形態の雨水貯留タンク１は、上記のとおり、タンク本体２の底面２ａに雨水の取水口４が突出して設けられているので、従来のタンク本体の前面に設けられるＬ字状に折れ曲がっている蛇口と比較して水圧の損失を低減して取水口４から雨水を効果的に取り出すことができる。このようなタンク本体の前面にＬ字状の蛇口が設けられている雨水貯留タンクでは、タンク内の雨水の水面が蛇口よりも低くなった場合にタンク内の雨水を蛇口から取り出すことができず、タンクの底部に雨水が長期間滞留し、水質が悪化したり、泥、砂利等の堆積によって蛇口に詰まりが発生するという問題もあったが、本実施形態の雨水貯留タンク１ではこのような問題が生じない。また、タンク本体２内部の残水を最小限にとどめて取水口４から雨水を取り出すことができるので、タンク本体２内の雨水を有効に利用することができる。   As described above, the rainwater storage tank 1 of the present embodiment is provided with the rainwater intake 4 protruding from the bottom surface 2a of the tank body 2, and is bent into an L shape provided on the front surface of the conventional tank body. It is possible to effectively take out rainwater from the water intake 4 while reducing the loss of water pressure as compared with the existing faucet. In such a rainwater storage tank in which an L-shaped faucet is provided on the front surface of the tank body, the rainwater in the tank cannot be taken out from the faucet when the surface of the rainwater in the tank is lower than the faucet. The rainwater stays at the bottom of the tank for a long time, the water quality deteriorates, and there is a problem that the faucet is clogged due to accumulation of mud, gravel, etc. In the rainwater storage tank 1 of the present embodiment, There is no problem. Moreover, since the rainwater can be taken out from the water intake 4 while the remaining water in the tank body 2 is minimized, the rainwater in the tank body 2 can be used effectively.

また、支持体２０の前方の凹み２２に臨むように取水口４が設けられているので、取水口４の下方にじょうろやバケツ等の容器を配置して取水口４から雨水を容器に直接給水することが可能である。したがって、じょうろやバケツ等の容器が使える高さと位置にブロック等を水平に積み上げて台座を組む等の雨水貯留タンク１の足場を整えることが不要になり、設置が容易になる。また、見栄えがよく建物になじみやすいすっきりした外観を実現する等、意匠性に優れ、建物との調和が図れるという利点も有する。しかも本実施形態の雨水貯留タンク１は断面視略楕円形状を有し支持体２０前方に凹み２２を形成しているので、雨水貯留タンク１を地面に設置したときに長径方向に対する転倒のおそれがなく、また短径方向に対しても倒れにくくなっている。   Further, since the water intake 4 is provided so as to face the recess 22 in front of the support body 20, a container such as a watering can or a bucket is arranged below the water intake 4, and rainwater is directly supplied to the container from the water intake 4. Is possible. Therefore, it is not necessary to prepare a scaffold for the rainwater storage tank 1 such as horizontally stacking blocks at a height and position where a container such as a watering can or a bucket can be used, and installing a pedestal. In addition, it has the advantage of being excellent in design and harmonizing with the building, such as realizing a clean appearance that is easy to match with the building. In addition, since the rainwater storage tank 1 of the present embodiment has a substantially elliptical shape in cross section and has a recess 22 formed in front of the support 20, there is a risk of falling over the major axis when the rainwater storage tank 1 is installed on the ground. Also, it is difficult to fall down in the minor axis direction.

さらにまた、タンク本体２の底面２ａに設けられた支持体２０に嵌挿される筒状の案内部１２によって、支持体２０とタンク本体２との間にずれを生じさせることなく両者の連結を容易にし、雨水貯留タンク１を地面に設置している状態においては、振動、風雨等によるタンク本体２のずれ、脱落等を防止し、確実な連結が実現される。   Furthermore, the cylindrical guide portion 12 fitted into the support body 20 provided on the bottom surface 2a of the tank body 2 allows easy connection between the support body 20 and the tank body 2 without causing a shift. In the state where the rainwater storage tank 1 is installed on the ground, the tank body 2 is prevented from being displaced or dropped off due to vibration, wind and rain, etc., and a reliable connection is realized.

１ 雨水貯留タンク
２ タンク本体
２ａ 底面
３ 雨水導入口
４ 取水口
５ オーバーフロー用排水口
１２ 案内部
２０ 支持体
２０ａ 前面
２１ 凹面
２２ 凹み
３０ 竪樋 DESCRIPTION OF SYMBOLS 1 Rainwater storage tank 2 Tank main body 2a Bottom surface 3 Rainwater introduction port 4 Water intake port 5 Overflow drain port 12 Guide part 20 Support body 20a Front surface 21 Concave surface 22 Concave surface 30

Claims (2)

竪樋から雨水を導入する雨水導入口、導入した雨水を取り出す取水口、及び過剰に導入された雨水を排水するオーバーフロー用排水口を有するタンク本体と、タンク本体を支持する筒状の支持体とを備え、支持体の前面は、凹面を有し、支持体の前方に凹みを形成しており、タンク本体の底面に、支持体前方の凹みに臨む取水口が下方に突出して設けられていることを特徴とする雨水貯留タンク。   A tank body having a rainwater introduction port for introducing rainwater from a gutter, a water intake port for taking out the introduced rainwater, and an overflow drainage port for discharging excessively introduced rainwater; and a cylindrical support body for supporting the tank body; The front surface of the support body has a concave surface, a recess is formed in front of the support body, and a water intake port facing the recess in front of the support body is provided on the bottom surface of the tank body so as to protrude downward. A rainwater storage tank characterized by that. 支持体に嵌挿される筒状の案内部がタンク本体の底面に形成されていることを特徴とする請求項１に記載の雨水貯留タンク。   The rainwater storage tank according to claim 1, wherein a cylindrical guide portion fitted into the support is formed on the bottom surface of the tank body.
JP2009151185A 2009-06-25 2009-06-25 Rainwater storage tank Expired - Fee Related JP5080534B2 (en)

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