JP4481771B2 - Rainwater tank - Google Patents

Description

  The present invention relates to a rainwater tank that accumulates rainwater that has fallen on the roof of a building and measures the use of rainwater.

    Conventionally, rainwater that has fallen on the roof is collected in a rainwater tank to measure the use of rainwater.

    Conventional rainwater tanks have a cylindrical shape, and are often placed directly on the ground foundation outside the building and fixed with anchor bolts. The rainwater tank is made of a corrosion resistant material such as vinyl chloride or stainless steel. Such a rainwater tank is generally restricted in height in consideration of water pressure applied to the tank. When the height is increased, stainless steel is used.

    When the height is low in a cylindrical tank, the tank capacity is secured by increasing the diameter. When the height is high, the upper part is close to the eaves, but it is made of stainless steel to withstand the water head and its own strength.

Rainwater is used as a miscellaneous water for flush toilets, for bathing, and for washing without being used for drinking except in light rain zones.
JP 2002-54188 A JP 2001-279728 A

    The problem to be solved is to provide a rainwater tank having a structure that makes it difficult to support the tank body and prevents deformation from the shape of the tank itself when it is well placed along the building so as to produce an aesthetic appearance. To do.

1st invention which concerns on this application is a rainwater tank which stores the rainwater which fell on the roof of the building,
a. On the outside side of the frame along the outer wall, the main pillar standing on the ground in the respective prospective direction of the frame and near the first floor eaves and near the second floor eaves, near the ground, near the first floor eaves, near the first floor eaves and near the second floor eaves In the vicinity, a tank support having a frame having each girder for connecting the main columns, a tank mounting portion provided for each of the main columns and each girder, and a connecting unit for connecting the frame and the building frame. A member,
b. A front plate located in the eaves in parallel with the rear plate and the rear plate parallel to the outer plate in a substantially hollow rectangular parallelepiped surrounded by the main pillar and the upper and lower opposing girders and arranged close to the tank support member And a tank body having a side plate that surrounds and ties the edges of the rear plate and the front plate, and a tank side mounting portion that is provided over the entire circumference of the side plate and is connected to the tank mounting portion,
c. Means for flowing rainwater into the tank body;
d. Taking out rain water from the tank body;
The rainwater tank is characterized in that the tank body is supported by the tank support member which is flat along the outer wall surface and surrounds the side plate side of the tank body over the entire circumference of the side plate side of the tank body.

    A second invention according to the present application is the rainwater tank according to the first invention, wherein the tank support member is made of steel and the tank body is made of FRP.

    According to the rainwater tank of the present invention, the tank main body is disposed in the vicinity of the tank support member and surrounded by the girders that are vertically opposed to the main column, and the tank support member is attached to the tank support member over the entire circumference on the side plate side of the tank. Since the tank portion and the tank side mounting portion are connected, the tank body can be supported without giving a large load to the tank body which is flat and high in height and difficult to obtain strength and rigidity along the outer wall. Therefore, deformation of the tank body can be suppressed.

    Since the tank body is flat and the width seen from the prospective direction fits between the adjacent pillars, the tank body is long enough to fit in the building.

    That is, since the installation area is reduced due to the length of the tank body and is disposed along the outer wall, there are few protrusions from the outer wall of the building to the outside. Nevertheless, the amount of rain that can be stored is practically sufficient due to the tank body having the height of the first floor of the building.

In the rainwater tank 3 (first floor installation 3a, second floor installation 3b) that stores rainwater that has fallen on the roof 2 of the building 1, referring to FIG.
a. On the outside of the adjacent pillar 1a along the outer wall 1b, the main pillar 4a standing on the ground in each prospective direction of the pillar 1a (see FIG. 2) and near the lower floor of the first floor eaves, and the first floor near the ground Near the eaves or near the first floor height and near the second floor eaves, the columns connecting the main columns 4a, that is, the lower columns 4c, the middle columns 4d, the upper columns 4e (4e not shown), the main columns 4a and the columns A tank support member 6 having a frame body 4 having a tank mounting portion 4f provided on each of 4c, 4d, and 4e, and a connecting portion 5 that connects the frame body 4 and a pillar 1a that is a housing of the building 1,
b. A main plate 4a and a rear plate 7a parallel to the outer wall 1b in a substantially hollow rectangular parallelepiped disposed between the main pillar 4a and the vertically opposed beams 4c and 4d or 4d and 4e and close to the tank support member 6; A front plate 7b parallel to the rear plate 7a and located in the eaves, side plates 7c, 7d, and 7e surrounding and connecting the edges of the rear plate 7a and the front plate 7b, and the entire circumference of the side plates 7c, 7d, and 7e. A tank body 7 having a tank side mounting portion 7f provided and connected to the tank mounting portion 4f;
c. Means 8 for flowing rainwater into the tank body 7,
d. Taking-out means 9 for taking out rainwater from the tank body;
The tank body 7 is supported over the entire circumference of the tank body 7 by the tank support member 6 that is flat along the outer wall 1b surface and surrounds the side plates 7c, 7d, and 7e of the tank body 7.

    In the above, the tank support member 6 is made of steel, and the tank body 7 is made of FRP.

    The rainwater inflow means 8 is connected to the rain gutter 2b and the tank body 7 via a filtration device 15, and the rainwater take-out means 9 is connected to the tank body 7 at the suction port side and discharged. The pump 13 is connected to the sprinkler 14 on the side, and the sprinkler 14 is provided on the roof 2 of the building. The rainwater is sent to the sprinkler 14 by the pump 13 and the rainwater is sprayed on the roof 2 by the sprinkler 14. The rain water sprayed on the roof 2 is collected by the rain gutter 2b and returned to the tank body 7 by the rain water inflow means 8.

    In the above watering device, the watering device 14 is provided along the building.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of a rainwater tank, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a plan view of FIG. FIG. 4 is a perspective view of the building.

(Water collection structure and inflow means)
Rainwater that falls on the roof 2 of the building 1 shown in FIG. 4 flows down the roof 2 and is collected in the eaves 2b1. The rainwater flowing down to the eaves 2b1 flows into the tank body 7 through the filtering device 15 interposed in the ancho 2b2, the call 2b3, and the call 2b3.

    The rain gutter 2b and the filter device 15 constituted by the eaves eaves 2b1, the anko 2b2 and the call 2b3 constitute the rainwater inflow means 8.

(Rainwater tank)
The tank body 7 is a substantially rectangular parallelepiped as shown in FIGS. The rear plate 7a is parallel to and close to the outer wall 1b, and the side plate 7c, 7d, 7e and the side plate are connected to surround the front plate 7b, the rear plate 7a, and the front plate 7b. 7c, 7d, 7e and a tank side mounting portion 7f provided intermittently or continuously over the entire circumference.

    The tank body 7 can be selected from FRP or stainless steel plate. 1 to 3 show the case of FRP. As shown in FIG. 1, the tank body 7 in this example is bonded, welded, etc. by contacting the outer flanges 7g provided around the edges of the respective openings of the divided pieces 7-1 to 7-5 divided into five. It is sealed and fixed by. The divided piece 7-1 is a container with a top plate 7e and the divided piece 7-5 is a ground plate 7d. Each of the split pieces 7-2 to 7-4 penetrates up and down and has a cylindrical shape. Outer flanges 7g are provided at the edges of the openings of the divided pieces 7-1 to 7-5, respectively. The edges of the divided pieces 7-1 to 7-5 provided with the outer flange 7g are reinforced by increasing the thickness.

    Ribs 7h are formed in the shape of a vertical groove when viewed from the outside through each of the divided pieces 7-1 to 7-5, and a vertical protrusion when viewed from the inside (see FIG. 5). The tank body 7 is reinforced and stiffened by the flange 7g and the rib 7h.

    The top plate 7e of the tank body 7 is provided with a rainwater inlet 7i. A call 2b3 is inserted into the inflow port 7i. The tip of the nominal 2b3 is provided in the upper part of the tank body 7 so that rainwater flowing into the tank body 7 is aerated.

    In addition, the top plate 7e of the tank body 7 is provided with an insertion port 7j into which the water pipe 16 is inserted. An electromagnetic valve 17 is interposed in the water pipe 16.

    Although not shown, the tank body 7 is provided with water level detection means. When the water level detection means detects the lower limit water level in the tank body 7, the water level detection means sends a lower limit water level signal to a control device (not shown). When the lower limit water level signal is received, the control device opens the electromagnetic valve 17 via a driver (not shown), and water is supplied from the water pipe 16 to the tank body 7 by opening the electromagnetic valve 17. When the water level in the tank body 7 rises due to this water supply and the water level detection means detects the upper limit water level, an upper limit water level signal is sent from the water level detection means to the control device. When receiving the upper limit water level signal, the control device closes the solenoid valve via the driver. Here, the upper limit water level is below the overflow water level described below.

    In addition, when providing the tank main body 7 only in the first floor height mentioned above, the opening connected with external air above an overflow water level is required. That is, in the case of FIG. 1, it is preferable to provide a gap between the nominal 2b3 and its inlet 7i, or to provide a gap between the water pipe 16 and its insertion port 7j. However, when there is no possibility that the inflow means 8 is blocked and becomes airtight, air is supplied to the tank body 7 through the inflow means 8, so that the tank body 7 can be a sealed tank.

    An overflow hole 7k is provided in the upper part of the side plate 7c of the tank body 7. A vertical overflow pipe 18 is provided along the side plate 7c to the overflow hole 7k and near the ground. When the water level in the tank body 7 reaches the overflow hole 7k, which becomes the overflow water level, due to the inflow of rainwater, more rainwater is discharged through the overflow pipe 18 as the overflow hole 7k.

    A drain port 7 m is provided in the ground side plate 7 d of the tank body 7. The other end of the suction pipe 13 b whose one end is connected to the drain port 7 m is connected to the suction port of the pump 13. The suction pipe 13b protrudes above the ground side plate 7d in the tank body 7. That is, the sediment at the bottom of the tank body 7 is prevented from flowing out. A stop valve 13c is interposed in the suction port 13b.

    Further, a cleaning port 7n is provided in the ground side plate 7d of the tank body 7. A plug 19 having a dust collecting function is provided at the cleaning port 7n. The stopper 19 has a hollow container shape, and an upper portion is opened toward the inside of the tank body 7. From this open upper part, the sediment to be deposited on the bottom surface of the tank body 7 is collected. Here, the precipitate is fine powder in rainwater that has passed through the filtration device 15.

    A water stop cock (not shown) for controlling the water supply to the rainwater tank 3 is provided on the upstream side of the water pipe 16. By closing the stop cock, the rainwater tank 3 is dedicated to rainwater.

(Tank support member)
The rainwater tank 3 is composed of a tank body and a support member. The plurality of rainwater tanks 3a and 3b are supported by a common support member.

    Next, the support of the tank body 7 will be described. As shown in FIGS. 1 to 3, a main pillar 4a is erected on a foundation 21 provided on the ground GL. The height of the main pillar 4 a is about the height of the first floor of the building 1 when there is only one tank body 7. The height of the main pillar 4a is the height of the second floor of the building when there are two tank bodies 7. Therefore, when the eaves are protruding from the roof of the building, the main pillar 4a is provided to the vicinity of the eaves. The position of the main pillar 4a in the prospective direction from the outer wall 1b of the building 1 is at the center position in the front-rear direction of the side plate 7c. By providing the main column 4a at the center position in the front-rear direction of the side plate 7c, no moment is applied to the main column 4a in the expected direction plane. Therefore, the main pillar 4a does not require special strength, and it is only necessary to withstand buckling by the tank body 7a filled with rainwater.

    The main pillar 4a is in the prospective direction of the pillar 1a on the exterior side of the adjacent pillar 1a along the outer wall 1b, for example, the frame of the building 1, and there are two main pillars 4a. Near the ground, near the height of the first floor (in the case of a one-story building, near the eaves), the main columns 4a are connected by girders 4c and 4d. In the case where the building 1 is a two-story building and the tank body 7 is connected vertically, a girder 4e is provided along the top side plate 7e of the upper tank body (referred to as 7A). Both ends are connected to the main pillar 4a extending upward. The connecting portion between the main column 4a and the girders 4c, 4d, 4e is formed by welding or a connecting member.

    In order to connect the main tank 4 and the main pillar 4a and the girders 4c, 4d, and 4e to the inner side of the main body 4a and the girders 4c, 4d, and 4e, the main pillar 4a A tank mounting portion 4f coupled to the tank side mounting portion 7f is provided on the inner peripheral side surrounded by the opposed girders 4c and 4d and 4d and 4e.

    Details of the tank side mounting portion 7f and the tank mounting portion 4f in the case where the tank main bodies 7 and 7A are made of resin are shown in FIG. 6 of the AA enlarged sectional view of FIG. The tank-side mounting portion 7f includes a base plate 7f1 embedded along the side plates 7c, 7d, and 7e of the tank body 7 and a flange 7f2 that stands up from the base plate 7f1 toward the outside of the tank body 7. The tank mounting portion 4f on the support member 4 side is a flange 4f1 provided along the member longitudinal direction of the main pillar 4a and girders 4c, 4d and 4e. The flange 7f2 and the flange 4f1 are fixed by bolts and nuts 22 which are overlapped and inserted therethrough.

    Thus, since the tank body 7 is provided with the tank side mounting portion 7f at the bisecting position on the surface in the expected direction of the side plates 7c, 7d, 7e, the tank body 7 is flat along the outer wall 1b. Even though the strength and rigidity cannot be increased, the tank body 7 is supported on the entire periphery of the side plate, so that deformation of the tank body 7 can be suppressed.

    As shown in FIGS. 2 and 3, the main pillar 4a is connected to the pillar 1a by the connecting portion 5 at a position where it intersects the girders 4c, 4d and 4e. However, since the connection part 5 should just be connected with the housing of the building 1, you may fix to a beam, a girder, etc. The connection part 5 and the main pillar 4a are joined by welding. The connection between the connecting portion 5 and the pillar 1a is made by screwing and fixing the screw through the flange 5a provided in the connecting portion 5 to the pillar 1a. Since the main column 4a supports just inside the expected direction of the tank body 7, no load is normally applied to the connecting portion 5. When the direction magnitude of the acceleration generated in an earthquake or the like is different between the tank body 7 and the housing, the strength of the connecting portion 5 and the connecting portion between the connecting portion 5 and the column 1a may be considered.

    In the above, the main pillar 4a, girders 4c, 4d, 4e, and the connecting portion 5 constituting the tank support member 4 are each made of steel. As this steel material, stainless steel is desirable from the viewpoint of corrosion resistance.

(Rainwater extraction means)
The means 9 for taking out rainwater stored in the tank body 7 will be described. The take-out means 9 may be simply piped to the demand destination depending on the purpose of use on the rainwater demand side. The rainwater demand destination is, for example, a bath, washing machine, flush toilet, etc. installed on the first floor.

    In this example, rainwater is pumped to the customer using the pump 13. The pump 13 is, for example, a well pump that is controlled at a constant end pressure. In such a case, the discharge pipe 13d connected to the discharge port of the pump 13 is connected to a bath and a washing machine through a water tap, and is connected to a water tank with a ball tap in a flush toilet. In addition, when rainwater is used for garden watering and car washing, a discharge pipe 13d is connected to an outdoor water tap.

(Decorative cover)
In the above, the decorative cover 23 which covers the support member 4 and the tank main bodies 7 and 7A is provided. As shown in FIG. 3, the decorative cover 23 has a U-shaped horizontal cross section and is disposed so that flange portions 23b formed by bending both sides of a front member 23a that is a web along the front plate 7b are in contact with the outer surface of the main column 4a. . Although not shown, a screw member that passes through the decorative cover 23 is screwed into the main pillar 4 a and the decorative cover 23 is fixed to the support member 4. There is a gap between the front member 23 a of the decorative cover 23 and the flat front plate 7 b of the tank body 7. Naturally, the gap is such that the edge of the outer flange 7g is separated from the front member 23a. As shown in FIG. 4, the decorative cover 23 is provided so as to cover the tank main bodies 7 and 7A installed at the first and second floor heights. That is, the decorative cover 23 is continuously provided up and down.

    The decorative cover 23 is preferably a fire-resistant member, for example, an iron plate, and an iron plate coated with acrylic resin is used from the viewpoint of corrosion resistance.

    Since there is a decorative cover 23, the tank body 7 and the tank support member 4 cannot be seen from the outside as shown in FIG. 4, and the appearance is particularly refreshed and the aesthetic appearance is improved by only seeing the decorative cover 23 having only three planes. it can. And even if the tank main body 7 is in a place with long sunshine, the tank main body 7 does not receive sunlight, and the temperature rise of rainwater in the tank main body 7 can be suppressed.

(Piping with upper tank body)
FIG. 1 shows piping around the tank main body 7 in the case of the first floor height (referring to the height from near the ground to the vicinity of the second floor surface or the vicinity of the first floor eaves). The piping when the tank main bodies 7 and 7A are connected in the case where there is a flat wall surface from the ground up to the second floor height (which means the height from near the ground to the vicinity of the second floor eaves) will be described. The upper tank body 7A is directly above the lower tank body 7.

    FIG. 8 is an example of a piping diagram when tank bodies are arranged vertically. In FIG. 8, the inflow means 8 is the same as in FIG. 1, and the inflow of rainwater from the inflow means 8 to the rainwater tank 3 is limited to the inflow to the upper tank body 7A. That is, the nominal 2b3 is not connected to the lower tank body 7. The nominal 2b3 is inserted into the inlet 7i of the top plate 7e of the tank body 7A. The overflow pipe 18a provided in the tank main body 7A has an upper end positioned at the upper overflow water level of the upper tank main body 7A and communicates with the tank main body 7A through the upper outlet 7p. The overflow pipe 18a Is connected to the inlet 7q of the top plate 7e of the lower tank body 7.

    An overflow port 7r to the second overflow pipe 18b provided in the tank body 7A is provided above the upper outlet 7p, which is a connecting portion between the upper tank body 7A and the overflow pipe 18a, that is, above the overflow water level. is there. The second overflow pipe 18b has one end connected to the overflow port 7r and the other end opened close to the ground. The overflow pipe 18a and the tank body 7 are sealed at the inlet 7q. That is, the lower tank body 7 is a sealed tank.

    The take-out means 9 includes a lower tank body 7 and a suction port of a pump 13 connected to each other by a suction pipe 13b via a check valve 13g, and a lower outlet 7s provided on the ground plate 7d of the upper tank body 7A. And a suction pipe 13 f communicating with the suction port of the pump 13. The suction pipes 13b and 13f are outflow pipes. This outflow pipe may be connected to the pipe to the customer without using a pump. A check valve 13g is interposed in the suction pipe 13b. The check valve 13g can flow rainwater from the lower tank body 7 through the suction pipe 13b (outflow pipe), but can flow rainwater to the tank body 7 through the suction pipe 13b (outflow pipe). There is no orientation.

    The water supply pipe 16 is inserted into the tank body 7A through the insertion port 7j. There is a gap between at least one of the call 2b3 and the inlet 7i and between the water pipe 16 and the insertion port 7j. However, as already described, when there is no possibility that the inflow means 8 is blocked and becomes airtight, the upper tank body 7A can be a sealed tank.

    The operation of the rainwater tank of FIG. 8 will be described. Rainwater that has flowed into the upper tank body 7A from the nominal 2b3 through the filtration device 15 is stored in the tank body 7A. The rainwater level in the tank body 7A rises due to the inflow of rainwater into the tank body 7A. When this water level becomes the overflow water level, rainwater flows from the upper outlet 7p into the lower tank body 7 through the overflow pipe 18a. Rainwater that has flowed into the tank body 7 is stored in the tank body 7. The rainwater level in the tank body 7 rises due to the inflow of rainwater into the tank body 7. Then, when the tank body 7 is full, the overflow pipe 18a is also full. Since the water level in the upper tank body 7A further rises due to the inflow of rainwater, the second overflow occurs from the overflow port 7r provided further above the upper outlet 7p from the tank body 7A to the overflow pipe 18a. It is discharged through the pipe 18b.

    Since the check pipe 13g is interposed in the suction pipe 13b, the rain water in the tank body 7A does not flow to the tank body 7 through the suction pipes 13f and 13b. If the upper tank body 7A is not fully filled, The inflow of rainwater into the tank body 7 does not start.

    When the upper tank main body 7A and the lower tank main body 7 are full of water, the operation of the rainwater take-out means 9 is as follows. When the pump 13 operates, the rainwater in the upper tank body 7A tends to be sucked in through the suction pipe 13f due to the negative pressure generated at the suction port of the pump 13, and the rainwater in the lower tank body 7 is sucked through the check valve 13g. It is going to be sucked through the pipe 13b. Since there is a head difference between the rain water in the upper tank body 7A and the lower tank body 7, rain water is sucked into the pump 13 from each tank body 7, 7A according to the water head difference and the piping resistance difference of the suction system. . However, this water head difference is remarkably larger than the pipe resistance difference between the suction pipe 13f and the suction pipe 13b with the check valve 13g interposed, so that the water level in the upper tank body 7A is considerably lowered until the water level in the upper tank body 7A drops considerably. Rainwater is sucked into the pump 13 through the suction pipe 13f.

    After the rainwater in the upper tank body 7A becomes empty or nears empty, the water is sucked into the pump 13 from the lower tank body 7 through the suction pipe 13b with the check valve 13g interposed.

    The advantage of this embodiment is that rainwater falling on the roof is first stored in the upper tank body 7A, so that the head of rainwater is effectively used.

    That is, even when rainwater can be stored only in the upper tank body 7A in a season with little rainfall, the rainwater in the tank body 7A has a large head. Even if it overflows from the upper tank main body 7A and rainwater enters the lower tank main body 7 and the lower tank main body 7 is full of rain water or less, the rainwater in the upper tank main body 7A The head of the rainwater is effectively used by giving priority to outflow.

    Therefore, on average, the pump load is small. And even when rainwater is made to flow directly into a flush toilet, a bath, and a washing machine without using a pump, the water supply speed is fast. The upper tank body is used as the main tank, and the lower tank body is used as the sub tank.

    In the embodiment of FIG. 9, the ground plate 7d which is the bottom of the upper tank body 7A and the top plate 7e of the lower tank body 7 are connected by a pipe 25 so that the upper tank body 7A and the lower tank body 7 communicate with each other. is there. The overflow pipe 18b is provided only in the upper tank body 7A. According to this embodiment, the same effect is obtained as when the tank bodies 7 and 7A are integrated. That is, rainwater flowing from the nominal 2b3 through the inlet 7i once enters the upper tank body 7A, but enters the lower tank body 7 through the pipe 25, and the water level of the lower tank body 7 rises and becomes full. After that, water storage in the upper tank body 7A begins. Since the tank bodies 7 and 7A are like one water tank, when using water, all the water heads are added to the suction port of the pump 13, so the pump load is high while there is rainwater in the upper tank body 7A. It's small.

    In addition, rain water may be caused to flow into the tank main bodies 7 and 7A from the call 2b3, and the rain water may be taken out from the tank main bodies 7 and 7A by the pump 13. In this case, the rainwater collected at the eaves 2b1 is distributed and diverted to each call 2b3.

(Watering device)
Buildings are heated significantly during the summer, especially when their outer walls and roofs receive sunlight. In particular, the roof is exposed to sunlight almost all day long as long as there is sunlight, so the degree of heating it receives from sunlight is large. Therefore, the temperature rise of the roof is remarkable. For this reason, room temperature is raised by the transfer of heat into the room. And since the heat capacity around the roof is large, the room is kept hot even at night.

    Another object of the present invention is to provide a watering device that has a very small installation area as described above, and that can be installed in a building together with a rainwater tank that does not protrude outward from the outer wall of the building. There is to do.

    As shown in FIG. 4, a sprinkler 14 is provided along the ridge of the roof 2 of the building 1. By providing the sprinkler 14 along the building, the aesthetic appearance of the building 1 is hardly affected.

    As shown in FIG. 4, the discharge pipe 13 d of the pump 13 is erected along the outer wall 1 b of the building 1, goes around the eaves 2 c from the bottom of the eave to the roof 2, and is piped upward on the slope of the roof 2 along the normal. It connects with the center part of the longitudinal direction of the arranged sprinkler 14. The discharge pipe 13d is preferably made of, for example, stainless steel made of a weather resistant material.

    As shown in FIG. 7, the sprinkler 14 is disposed on the ridge 2d along the ridge 2d, and is locked to the edge of the ridge 2d having a cross-sectional shape with a stopper 14a. Here, the roof 2 is a flat steel plate, a flat plate slate, a color vest (product name) and the like similarly uses a ridge 2d shaped like a cross section. Then, the above-mentioned ridge 2d is covered from the top of the straw. And it is good to bend and stop the both edges of the longitudinal direction of the ridge 2d to the lower edge of the straw.

    The sprinkler 14 communicates with the discharge pipe 13d at the center in the longitudinal direction. The sprinkler 14 is, for example, a pipe made of stainless steel or synthetic resin such as vinyl chloride. Both ends of the sprinkler 14 are closed with caps or stoppers.

    A large number of small holes 14 b are formed along the bus bar of the water sprinkler 14. There are one or two busbars, and the size, number, and arrangement of the small holes 14b are determined so that water flows on the roof 2 on average.

    In FIG. 4, when the pump 13 is driven, the water in the rainwater tank 3 is sucked into the pump 13 and sent to the sprinkler 14 through the discharge pipe 13d. The rainwater pumped to the sprinkler 14 flows down on the roof 2. When the roof 2 flows down, the roof 2 heated by sunlight and heated is cooled. This cooling is due to heat exchange with rainwater and evaporation heat of rainwater. Thus, the rainwater heated on the roof 2 flows from the roof 2 into the rainwater tank 3 from the call 2b3 through which the eaves 2b1, the ank 2b2, and the filtration device 15 are interposed. Rainwater flowing into the rainwater tank 3 stays until it is sucked again by the pump 13. Since the tank bodies 7 and 7A have a larger surface area than the volume, heat dissipation is performed efficiently. In particular, there are gaps between the rear plate 7a and the outer wall 1b of the tank bodies 7 and 7A, the front plate 7b and the front member 23a of the decorative cover 23, the side plate 7c and the flange 23b of the decorative cover 23, and the air rising through these gaps. Therefore, the tank bodies 7 and 7A are efficiently cooled, and the temperature of the rainwater in the tank bodies 7 and 7A can be lowered.

(Other embodiments of inflow means)
FIG. 10 shows another embodiment of the inflow means.

    In this embodiment, the inflow means for rainwater and the overflow pipe when rainwater becomes excessive are used. The overflow pipes 18 and 18b for overflowing and discharging from the tank body 7 or 7A to the outside are not provided.

    The nominal 2b4 is connected to the inflow side of the filtration device 15 in FIG.

    Attach the upper end of the flange 2b5 to the lower end of the ank 2b2. The lower end of the flange 2b5 is followed by a small diameter portion having the same diameter as the flange 2b5 at the upper end of the divergent pipe 2b6. The upper end of the overflow chamber 2b7 continues to the lower end whose diameter is larger than the upper end of the divergent pipe 2b6. The overflow chamber 2b7 is a container in this example, for example, a container having a circular horizontal cross section, and has a bottom 2b8. An overflow pipe 18c is provided in the eaves direction through the bottom 2b8. The overflow pipe 2b8 has an upper end 18c1 opened in the overflow chamber 2b7.

    The nominal 2b4 is connected to the peripheral wall of the overflow chamber 2b7 and communicates with the overflow chamber 2b7.

    As shown in FIG. 10, there is a difference in height h between the upper end 18c1 of the overflow pipe 18c and the uppermost position of the inner peripheral surface of the hollow cylindrical nominal diameter 2b4. The upper part is at a position higher than the upper end of the overflow pipe 18c. The height h is significantly smaller than the diameter of the nominal 2b3. In this example, the solid name 2b3 and the tank body 7 (the same applies to the case where there is one tank main body), the tank main body 7A (the same applies to the case where the tank main bodies 7 and 7A are connected up and down, the same applies) 2b3 The connecting portion is sealed. That is, in this case, the tank body 7 or 7A to which the nominal 2b3 is connected is a sealed tank.

    In the above, the tank 2b5, the divergent pipe 2b6, the overflow chamber 2b7, and the overflow pipe 18c form a water collection port for the tank body 7 or 7A. These members are integrally formed of synthetic resin by molding, bonding or the like.

    Next, the operation will be described. When rainwater enters the divergent pipe 2b6 from the coral 2b2 through the ridge 2b5, an action along the peripheral wall of the divergent pipe 2b6 occurs due to the action of the flow velocity. If this action is difficult to occur, an umbrella-shaped member having an outer diameter slightly larger than the diameter of the overflow pipe 18c is provided apart from the upper end 18c1 of the overflow pipe 18c. The umbrella-shaped member is supported by a plurality of legs erected from the upper end 18c1 of the overflow pipe 18c (the above is not shown).

    Rainwater flowing down the divergent pipe 2b6 falls around the overflow pipe 18c in the overflow chamber 2b7. Then, it flows from the overflow chamber 2b7 to the nominal 2b4, is filtered by the filtration device 15, and flows into the tank body 7 or 7A through the nominal 2b3.

    When the tank body 7 or 7A is full, the inflow of rainwater into the tank body 7 or 7A through the call 2b4 is stopped. Therefore, the water level in the overflow chamber 2b7 of rainwater flowing into the overflow chamber 2b7 through the ank 2b2, the ridge 2b5 and the divergent pipe 2b6 rises. When the rainwater level exceeds the upper end 18c1 of the overflow pipe 18c, the rainwater is discharged through the overflow pipe 18.

    If the amount of precipitation is very high, even if the tank body 7 or 7A is not full, rainwater will flow into the tank body 7 or 7A and allow the piping system from the nominal 2b4 to the tank bodies 7 and 7A. Due to the inflow of the rainwater exceeding the amount of water into the overflow chamber 2b7, part of the rainwater having a flow rate higher than the flow rate to the tank body 7 or 7A is discharged through the overflow pipe 18c through the nominal 2b4.

  From the embodiment, it is effective as a rainwater tank attached to a building.

It is a front view of a rainwater tank. It is a right view of FIG. It is a top view of FIG. It is a perspective view which shows a watering apparatus. It is a horizontal sectional view showing the shape of a rib. It is an AA expanded sectional view of FIG. It is a perspective view of a watering apparatus. It is a piping diagram in case a tank main body is two tanks. It is a piping diagram in case a tank main body is two tanks. It is a longitudinal cross-sectional view of the other Example of the inflow means incorporating the overflow pipe | tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Building 1a ... Pillar 1b ... Outer wall 2 ... Roof 2b ... Rain gutter 2b1 ... Eaves 2b2 ... Anko 2b3 ... Call 2c ... Eaves 2d ... Wing 3, 3a, 3b ... Rain water tank 4 ... Frame 4a ... Main pillar 4c ... Lower girder 4d ... Middle girder 4e ... Upper girder 4f ... Tank mounting part 4f1 ... Flange 5 ... Connecting part 5a ... Flange 6 ... Tank support members 7, 7A ... Tank body 7a ... Rear plate 7b ... Front plate 7c ... Side plate 7d ... Ground side plate 7e ... Top side plate 7f ... Tank side mounting portion 7f1 ... Base plate 7f2 ... Flange 7g ... Outer flange 7h ... Rib 7i ... Inlet 7j ... Insertion port 7k ... Overflow hole 7m ... Drainage port 7n ... Cleaning port 7q ... Inlet 7s, 7p ... Outlet 7r ... Overflow port 8 ... Inlet means 9 ... Extraction means 13 ... Pump 13b ... Suction pipe 13c ... Stop valve 13d ... Discharge pipe 13f ... Suction pipe 13g ... Check valve 14 ... Spatter 14a ... Clasp 14b ... Small hole 15 ... Filtration device 16 ... Water pipe 17 ... Solenoid valve 18 ... Overflow pipe 18a ... Overflow pipe 18b ... Second overflow pipe 19 ... Plug 21 ... Base 22 ... Bolt nut 23 ... Cosmetic cover 23a ... Front member 23b ... Flange 25 ... Piping

Claims (2)

In a rainwater tank that stores rainwater that falls on the roof of a building,
a. On the outside side of the frame along the outer wall, the main pillar standing on the ground in the respective prospective direction of the frame and near the first floor eaves and near the second floor eaves, near the ground, near the first floor eaves, near the first floor eaves and near the second floor eaves In the vicinity, a tank support having a frame having each girder for connecting the main columns, a tank mounting portion provided for each of the main columns and each girder, and a connecting unit for connecting the frame and the building frame. A member,
b. A front plate located in the eaves in parallel with the rear plate and the rear plate parallel to the outer plate in a substantially hollow rectangular parallelepiped surrounded by the main pillar and the upper and lower opposing girders and arranged close to the tank support member And a tank body having a side plate that surrounds and ties the edges of the rear plate and the front plate, and a tank side mounting portion that is provided over the entire circumference of the side plate and is connected to the tank mounting portion,
c. Means for flowing rainwater into the tank body;
d. Taking out rain water from the tank body;
A rainwater tank comprising: a tank main body that is flat along an outer wall surface and is supported by the tank support member that surrounds the side plate side of the tank main body over the entire circumference of the side of the tank main body. The rainwater tank according to claim 1, wherein the tank support member is made of steel and the tank body is made of FRP.

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