structures

Abstract

To provide a structure that can store rainwater while making effective use of a space.SOLUTION: A structure 10 comprises a structure body 20 having a courtyard 12 without a roof, and a waterproof shutter 30 that surrounds the courtyard 12 and forms a water storage space 34 in the courtyard 12.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a structure. [Background technology]

[0002] Rainwater tanks that are installed on the side of buildings and that store rainwater that falls on the roofs of the buildings are known (see, for example, Patent Document 1). Also known are water tanks that are formed inside the bridge piers of expressways and that store rainwater that falls on the expressways (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 60-58663 [Patent Document 2] Japanese Patent Application Publication No. 11-323828 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in Patent Document 1, for example, stores rainwater in a rainwater tank during heavy rainfall, thereby preventing river flooding, flooding above floor level, etc. Furthermore, unlike the case of forming a rainwater storage tank underground, the technology disclosed in Patent Document 1 does not require excavation of the ground, improving workability.

[0005] However, the technique disclosed in Patent Document 1 requires a space to install the rainwater tank on the side of the structure. Furthermore, in the technology disclosed in Patent Document 2, the space within the bridge pier is used as a water storage space, so the amount of water that can be stored is limited.

[0006] In consideration of the above, an object of the present invention is to provide a structure that can store rainwater while making effective use of space. [Means for solving the problem]

[0007] According to the first aspect The structure includes a structural body having a courtyard with or without a roof, and a waterproofing member surrounding the courtyard and forming a water storage space in the courtyard.

[0008] First aspect According to the structure, the water-blocking member surrounds the courtyard of the structure, forming a water storage space in the courtyard. This allows rainwater to be stored in the water storage space during heavy rain, for example. This makes it possible to prevent river flooding, flooding above floor level, etc.

[0009] Furthermore, in the present invention, as described above, a water storage space is formed in the courtyard. Therefore, unlike when a rainwater storage tank is formed underground, the present invention does not require excavation underground, improving workability. Furthermore, since the water storage space is formed in the courtyard in the present invention, the amount of water stored can be increased compared to when a water storage space is formed inside a bridge pier, as in the prior art (see, for example, Patent Document 2).

[0010] Furthermore, in the present invention, the courtyard also serves as a water storage space, which allows for more efficient use of space than when a rainwater tank is provided in a structure.

[0011] According to the second aspect The structure is According to the first aspect The structure includes a drainage pipe connected to the courtyard for draining rainwater from the courtyard, and an opening / closing member attached to the drainage pipe for opening and closing the drainage pipe.

[0012] Second aspect According to the structure of the present invention, a drainage pipe for draining rainwater from the courtyard is connected to the courtyard. The drainage pipe is provided with an opening / closing member for opening and closing the drainage pipe.

[0013] Here, for example, during normal times other than heavy rain, the opening and closing member of the drain pipe is left open, so that rainwater in the courtyard is drained through the drain pipe.

[0014] On the other hand, during heavy rain, the drain pipe's opening and closing mechanism is closed, which limits the drainage of rainwater from the courtyard through the drain pipe. As a result, rainwater can be efficiently stored in the courtyard's water storage space. This further reduces river flooding and flooding above floor level (regional flooding damage).

[0015] According to the third aspect The structure is First aspect or According to the second aspect The structure includes a housing portion for housing the water-blocking member.

[0016] Third aspect According to the structure of the present invention, a storage section for storing the water-blocking member is provided. As a result, during normal times other than heavy rain, the water-blocking member is stored in the storage section, thereby eliminating water storage space from the courtyard. Therefore, the effective space of the courtyard can be expanded.

[0017] During heavy rain, the waterproofing material stored in the storage unit can be deployed into the courtyard, creating a water storage space in the courtyard. This can help prevent river flooding and flooding above floor level (regional flood damage).

[0018] According to the fourth aspect The structure is First aspect ~ Third aspect Any one of pertaining to one In the structure, the water-blocking member includes at least one of a waterproof shutter, a water-blocking plate, and pressure-resistant glass facing the courtyard.

[0019] Fourth aspect According to the structure of the present invention, a water storage space can be easily formed in the courtyard using waterproof shutters, water shielding plates, and pressure-resistant glass facing the courtyard. [Effects of the Invention]

[0020] As described above, according to the present invention, a structure capable of storing rainwater while making effective use of space can be obtained. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a plan view showing a structure according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. [Figure 3] 3 is a cross-sectional view corresponding to FIG. 2 showing a state in which a water storage space is formed in the courtyard of the structure according to the first embodiment. FIG. [Figure 4] FIG. 3 is a plan view corresponding to FIG. 2, showing a structure according to a second embodiment. [Figure 5] 5 is a cross-sectional view corresponding to FIG. 4, showing a state in which a water storage space is formed in the courtyard of the structure according to the second embodiment. FIG. [Figure 6] FIG. 4 is a longitudinal cross-sectional view showing a water shield plate according to a modified example of the first embodiment. [Figure 7] FIG. 10 is a perspective view showing a courtyard according to a modified example of the first embodiment. [Figure 8] FIG. 10 is a plan view showing a structure according to a modified example of the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] (First embodiment) First, the first embodiment will be described.

[0023] FIG. 1 shows a structure 10 according to a first embodiment. The structure 10 has a structural body 20 and a stormwater treatment facility 40 (see FIG. 2). The structural body (superstructure) 20 is formed in a rectangular ring shape (a square-shaped opening) in a plan view. An open courtyard 12 is formed in the center of the structural body 20. The courtyard 12 is formed in a rectangular shape in a plan view. The ground is exposed to this courtyard 12.

[0024] As shown in Figure 2, the structure 20 is made up of multiple floors. A room 22 on each floor of the structure 20 is provided with a balcony 24 facing the courtyard 12. A waist wall 26 is provided on the balcony 24. An opening 28 is formed above the waist wall 26. The waist wall 26 is an example of an exterior material facing the courtyard 12.

[0025] A plurality of waterproof shutters are provided on the first floor 20F1 of the structure 20. The plurality of waterproof shutters are electric shutters that are waterproof and pressure-resistant (water pressure resistant). These waterproof shutters are provided in the passageways (not shown) and verandas 24 on the first floor 20F1 of the structure 20 so as to surround the courtyard 12.

[0026] 3 shows, as an example, a waterproof shutter 30 provided on the balcony 24 on the first floor 20F1 of the structural body 20. The waterproof shutter 30 is provided on the balcony 24 so that an opening 28 can be opened and closed.

[0027] Specifically, as shown in Fig. 2, the waterproof shutter 30 is stored in an expandable manner in a storage section 32 provided on the balcony 24 on the upper floor. In this state, the opening 28 of the balcony 24 is open. On the other hand, as shown in Fig. 3, when the waterproof shutter 30 is expanded downward from the storage section 32, the waterproof shutter 30 is positioned along the outer surface of the waist wall 26, and the lower end of the waterproof shutter 30 reaches the ground of the courtyard 12. This closes the opening 28 of the balcony 24.

[0028] Here, when the multiple waterproof shutters 30 on the first floor 20F1 are deployed, the courtyard 12 is surrounded by these waterproof shutters 30. As a result, a water storage space 34 capable of storing rainwater is formed inside the multiple waterproof shutters 30.

[0029] The waterproof shutter 30 is an example of a waterproof member. A control unit 70, which will be described later, is electrically connected to the multiple waterproof shutters 30. The control unit 70 switches these waterproof shutters 30 between a housed state in which they are housed in the housing section 32 and an expanded state in which they are expanded from the housing section 32.

[0030] (Rainwater treatment facility) 2 and 3, the structure 10 is provided with a stormwater treatment facility 40 that drains stormwater into a public stormwater pipe 14. The public stormwater pipe 14 is buried in the ground G outside the site of the structure 10, for example. A public street gutter 16 or the like is connected to the public stormwater pipe 14 via a drainage pipe 18, for example.

[0031] The rainwater treatment facility 40 includes a plurality of rain gutters 44, a plurality of rainwater cisterns 46A, 46B, a plurality of drainage pipes 48, 54, a plurality of courtyard drainage pipes 52, and an opening / closing member 60. The plurality of rain gutters 44 are drainage pipes that extend vertically along the outer wall (peripheral wall) 20A of the structure 20, and are provided on both sides of the structure 20. The upper ends of these rain gutters 44 reach the roof 20R of the structure 20.

[0032] As shown in Fig. 1, parapets 36 are provided on the outer and inner peripheries of the roof 20R of the structure 20, surrounding the roof 20R. A plurality of roof drainage outlets 42 for draining rainwater are formed in the roof 20R. The plurality of roof drainage outlets 42 are formed on both sides of the roof 20R. The upper ends of the aforementioned rain gutters 44 are connected to these roof drainage outlets 42, respectively.

[0033] The floor of the rooftop 20R is provided with a drainage slope to allow rainwater to flow to the rooftop drain outlets 42. The number and arrangement of the rooftop drain outlets 42 can be changed as appropriate.

[0034] As shown in Fig. 3, the lower end of the rain gutter 44 is connected to rainwater manholes 46A and 46B, respectively. The rainwater manholes 46A and 46B are buried in the ground G on the site of the structure 10. This allows rainwater from the rooftop 20R to be drained into the rainwater manholes 46A and 46B via the rooftop drain outlet 42 (see Fig. 1) and the rain gutter 44.

[0035] The multiple rainwater manholes 46A, 46B are connected to one another via a drain pipe 48. In addition, multiple courtyard drain pipes 52 are connected to the drain pipe 48. These courtyard drain pipes 52 are connected to multiple courtyard drain outlets 50 formed in the courtyard 12. As a result, rainwater from the courtyard 12 is drained into the drain pipe 48 via the courtyard drain outlets 50 and the courtyard drain pipes 52.

[0036] Furthermore, when a water storage space 34 is formed by a plurality of waterproof shutters 30, the multiple courtyard drain outlets 50 are arranged within the water storage space 34. In other words, the water storage space 34 is connected to the drain pipe 48 via the courtyard drain outlets 50 and the courtyard drain pipe 52. As a result, rainwater W stored in the water storage space 34 is drained to the drain pipe 48 via the courtyard drain outlets 50 and the courtyard drain pipe 52. The courtyard drain pipe 52 is an example of a drain pipe.

[0037] Of the multiple storm water manholes 46A, 46B, the storm water manhole 46A on the public storm water pipe 14 side is connected to the public storm water pipe 14 via a drain pipe 54. In addition, the drain pipes 48, 54 are provided with a drainage gradient (downward gradient) that descends toward the public storm water pipe 14. This allows rainwater from the rooftop 20R and the courtyard 12 to be drained from the storm water manholes 46A, 46B via the drain pipes 48, 54 into the public storm water pipe 14.

[0038] Here, an opening / closing member 60 is provided in the storm water manhole 46A on the public storm water pipe 14 side. The opening / closing member 60 is, for example, a solenoid valve that opens and closes the drain pipe 54, or an opening / closing damper (opening / closing plate) that opens and closes the drain pipe 54. A control unit 70 is electrically connected to the opening / closing member 60. The control unit 70 switches the opening / closing member 60 between an open state that opens the drain pipe 54 and a closed state that closes the drain pipe 54.

[0039] (Control unit) The control unit 70 is configured by a computer including, for example, a CPU, a memory, and a recording device, and is electrically connected to the waterproof shutters 30 and the opening and closing members 60 described above. The control unit 70 controls the operations of the multiple waterproof shutters 30 and the opening and closing members 60. The control unit 70 of this embodiment controls the operations of the opening and closing members 60 and the multiple waterproof shutters 30 based on, for example, a precipitation forecast for the area where the structure 10 is located.

[0040] Specifically, the control unit 70 has a receiving unit that receives a precipitation forecast for the area where the structure 10 is located. When the precipitation forecast received by the receiving unit exceeds a predetermined value (threshold value), the control unit 70 activates the multiple waterproof shutters 30 on the first floor 20F1 of the structure 20 and unfolds the waterproof shutters 30 housed in the housing parts 32. As a result, the courtyard 12 is surrounded by the multiple waterproof shutters 30, and a water storage space 34 capable of storing rainwater W is formed inside these waterproof shutters 30.

[0041] Furthermore, when the precipitation forecast received by the receiving unit exceeds a predetermined value, the control unit 70 operates the opening / closing member 60 to switch from an open state that opens the drain pipe 54 to a closed state that closes the drain pipe 54. This stops the drainage W of stormwater from the stormwater treatment facility 40 of the structure 10 to the public storm sewer 14.

[0042] The predetermined value of the precipitation forecast is set based on, for example, the drainage capacity of the public storm sewer 14 and the drainage capacity of the stormwater treatment facility 40 of the structure 10. Then, the control unit 70 activates the opening / closing member 60 and the plurality of waterproof shutters 30 when, for example, the precipitation forecast received by the receiving unit exceeds the drainage capacity of at least one of the public storm sewer 14 and the stormwater treatment facility 40 of the structure 10.

[0043] (action) Next, the operation of the first embodiment will be described.

[0044] 2 shows a state (normal state) in which a plurality of waterproof shutters 30 (see FIG. 3) are housed in the housing portion 32 and the opening / closing member 60 opens the drain pipe 54. In this state, when the precipitation forecast received by the receiving portion exceeds a predetermined value, the control portion 70 first operates the plurality of waterproof shutters 30 on the first floor 20F1 of the structure 20 as shown in FIG. 3, and unfolds these waterproof shutters 30. As a result, a water storage space 34 capable of storing rainwater is formed in the courtyard 12 of the structure 20.

[0045] Next, the control unit 70 activates the opening / closing member 60, which closes the drain pipe 54. This stops the drainage of rainwater from the stormwater treatment facility 40 of the structure 10 to the public storm sewer 14. As a result, the rainwater W that falls in the courtyard 12 is stored in the water storage space 34 formed in the courtyard 12.

[0046] In this manner, in this embodiment, for example, during heavy rain, rainwater W that falls in the courtyard 12 of the structure 20 can be stored in the water storage space 34. As a result, overflow of the public storm drain 14 is suppressed. Therefore, flood damage (flooding above floor level) in the area where the structure 10 is located, river flooding, etc. can be suppressed.

[0047] Furthermore, rainwater that falls on the roof 20R of the structure 20 flows back from the storm water manholes 46A, 46B through the drain pipe 48 and the courtyard drain pipe 52, and from the courtyard drain outlet 50 to the water storage space 34, where it is stored. This further prevents the public storm water pipe 14 from overflowing.

[0048] Furthermore, in this embodiment, a water storage space 34 is formed in the courtyard 12 by using a plurality of waterproof shutters 30. Therefore, in this embodiment, unlike when a rainwater storage tank is formed underground, there is no need to excavate the ground G, which improves workability.

[0049] Moreover, in this embodiment, the courtyard 12 also serves as the water storage space 34. As a result, in this embodiment, space can be used more effectively than when a rainwater tank is provided in the structure 20. Also, in this embodiment, the water storage space 34 is formed in the courtyard 12, so the amount of water that can be stored can be increased compared to when a water storage space is formed in a bridge pier, as in the prior art (see, for example, Patent Document 2).

[0050] Furthermore, during normal times other than heavy rain, the waterproof shutter 30 can be stored in the storage section 32, thereby eliminating the water storage space 34 from the courtyard 12. Therefore, the effective space of the courtyard 12 can be expanded.

[0051] Furthermore, the drain pipe 48 is connected to the water storage space 34 via the courtyard drain pipe 52. As a result, after the heavy rain has passed, the control unit 70 operates the opening / closing member 60 to open the drain pipe 54, and the rainwater W stored in the water storage space 34 is drained into the public storm sewer 14 via the courtyard drain pipe 52 and the drain pipes 48 and 54. This makes it easy to drain the rainwater W stored in the water storage space 34.

[0052] Moreover, the waterproof shutter 30 also serves as a shutter for opening and closing the opening 28 of the balcony 24 on the first floor 20F1 of the structure 20. Therefore, in this embodiment, costs can be reduced compared to when a dedicated waterproof shutter for the water storage space 34 is provided on the first floor 20F1 of the structure 20.

[0053] Second Embodiment Next, a second embodiment will be described. In the second embodiment, the same components as those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0054] 4 and 5, the structure 10 according to the second embodiment includes a rainwater treatment facility 80. The rainwater treatment facility 80 includes a plurality of rain gutters 82, a filtration tank 84, and a treated water storage tank 86.

[0055] A plurality of rain gutters 82 are arranged in the courtyard 12 of the structure 20. The rain gutters 82 are drainage pipes that extend in the vertical direction. The upper ends of these rain gutters 82 are connected to roof drainage outlets (not shown) formed on the roof 20R of the structure 20. Meanwhile, the lower ends of the rain gutters 82 are connected to a filter tank 84 buried in the ground G of the courtyard 12. As a result, rainwater that falls on the roof 20R is drained into the filter tank 84 via the rain gutters 82.

[0056] The filtration tank 84 is buried in the ground G below the courtyard 12. This filtration tank 84 filters the rainwater W that has permeated the ground G from the courtyard 12, and removes suspended matter and the like from the rainwater W. Below this filtration tank 84, a treated water storage tank 86 is provided.

[0057] A treated water storage tank (purified water storage tank) 86 is buried in the ground G below the filtration tank 84. This treated water storage tank 86 stores filtered water (treated water) W that has been filtered in the filtration tank 84. In addition, a rainwater manhole 46A is connected to the treated water storage tank 86 via a drain pipe 88. This treated water storage tank 86 is provided with an opening / closing member 60 that opens and closes the drain pipe 88.

[0058] The treated water storage tank 86 is connected to an elevated water tank 91 provided on the roof 20R or the like of the structure 20 via an indoor water supply pipe 90. A pump 92 is also provided on the indoor water supply pipe 90. By operating this pump 92, filtered water W is supplied from the treated water storage tank 86 to the elevated water tank 91 via the indoor water supply pipe 90.

[0059] An outdoor water supply device 96 such as a faucet is connected to the treated water storage tank 86 via an outdoor water supply pipe 94. A pump 98 is provided on the outdoor water supply pipe 94. By operating this pump 98, filtered water W is supplied from the treated water storage tank 86 to the outdoor water supply device 96 via the outdoor water supply pipe 94.

[0060] The filtered water W stored in the treated water storage tank 86 is used as water for general purposes such as toilets and watering plants.

[0061] (action) Next, the operation of the second embodiment will be described.

[0062] In the structure 10 according to this embodiment, a filter tank 84 and a treated water storage tank 86 are buried in the ground G beneath the courtyard 12. As a result, rainwater W that falls on the courtyard 12 is filtered by the filter tank 84 and then stored in the treated water storage tank 86.

[0063] In addition, multiple rain gutters 82 are provided in the courtyard 12. As a result, rainwater W that falls on the rooftop 20R is drained through the multiple rain gutters 82 into a filtration tank 84, filtered in the filtration tank 84, and then stored in a treated water storage tank 86.

[0064] Here, the structure 20 is connected to the treated water storage tank 86 via an indoor water supply pipe 90, and an outdoor water supply device 96 is connected via an outdoor water supply pipe 94. This allows the rainwater (filtered water) W that falls on the courtyard 12 and rooftop 20R of the structure 20 to be reused.

[0065] In addition, a rainwater manhole 46A is connected to the treated water storage tank 86 via a drain pipe 88. As a result, when the amount of filtered water W stored in the treated water storage tank 86 exceeds a predetermined value, the filtered water W is drained into the public rainwater pipe 14 via the drain pipe 88, the rainwater manhole 46A, and the drain pipe 54.

[0066] Here, when the precipitation forecast received by the receiving unit exceeds a predetermined value, the control unit 70 of this embodiment first activates the multiple waterproof shutters 30 on the first floor 20F1 of the structure 20 as shown in Fig. 5, and unfolds these waterproof shutters 30. As a result, a water storage space 34 capable of storing rainwater W is formed in the courtyard 12 of the structure 20.

[0067] Next, the control unit 70 activates the opening / closing member 60, which closes the drain pipe 88. This stops the discharge of filtered water W from the treated water storage tank 86 to the public storm sewer 14. As a result, the rainwater W that falls on the courtyard 12 and the rooftop 20R is stored in the water storage space 34 formed in the courtyard 12. This prevents the public storm sewer 14 from overflowing. This makes it possible to prevent flooding damage (flooding above floor level) in the area where the structure 10 is located, river flooding, etc.

[0068] Furthermore, the rainwater W stored in the water storage space 34 is filtered in a filtration tank 84 and then stored in a treated water storage tank 86. The filtered water (rainwater) W stored in the treated water storage tank 86 is then supplied to an indoor water supply pipe 90 or an outdoor water supply device 96 by operating pumps 92, 98. Therefore, for example, during recovery after a heavy rain has passed, the filtered water W stored in the treated water storage tank 86 can be easily reused.

[0069] (Variation) Next, modifications of the above-described embodiment will be described. Note that, although various modifications will be described below using the above-described first embodiment as an example, these modifications can also be applied to the above-described second embodiment as appropriate.

[0070] In the first embodiment, the water storage space 34 is formed by the waterproof shutter 30 provided on the first floor 20F1 of the structure 20. However, it is also possible to provide waterproof shutters on the verandas 24 on the second and third floors of the structure 20, for example, and form water storage spaces across multiple floors of the structure 20 using these waterproof shutters. In this case, for example, the control unit 70 appropriately deploys the waterproof shutters on the second and third floors of the structure 20 in accordance with the precipitation forecast received by the receiving unit. This prevents the overflow of rainwater stored in the water storage space.

[0071] In the first embodiment, the waterproof shutter 30 serving as a water-blocking member is arranged along the outer surface of the waist wall 26 of the balcony 24 when unfolded. However, the waterproof shutter may be arranged along an exterior material such as an outer wall or sash of the structure 20 facing the courtyard 12, or opposite the exterior material when unfolded. Also, a water-blocking member such as a water shield plate or waterproof sheet may be arranged along an exterior material of the structure 20 facing the courtyard 12, or opposite the exterior material. The balcony 24 may be omitted.

[0072] In the first embodiment, the waterproof shutter 30 is used as the waterproof member. However, as in the modified example shown in Fig. 6, an undulating water shielding plate (waterproof plate) 110 may be used as the waterproof member.

[0073] Specifically, the water shielding plate 110 is formed of a metal plate, a resin plate, or the like that has water impermeability and pressure resistance (water pressure resistance). The water shielding plate 110 is provided, for example, in the passage 100 on the first floor 20F1 of the structure 20 that leads to the courtyard 12.

[0074] The water barrier 110 is housed in a concave housing 102 formed in the floor of the passage 100 so that it can be raised and lowered. The water barrier 110 is housed in the housing 102 in a horizontal position. When the water barrier 110 is housed in the housing 102, the water barrier 110 forms part of the floor of the passage 100.

[0075] A lifting arm 112 is connected to the water shielding plate 110. The lifting arm 112 is housed in the housing section 102 so as to be deployable. The lifting arm 112 is, for example, electrically operated and is operated by a control section (not shown). When the lifting arm 112 is operated, one end of the water shielding plate 110 is lifted, and the water shielding plate 110 is tilted relative to the floor. As a result, the water shielding plate 110 seals off the passage 100, and a water storage space 34 capable of storing rainwater W is formed in the courtyard 12.

[0076] The water barrier plate is not limited to the undulating type, but may be a sliding type, a swing type, or a detachable type.

[0077] 7, for example, pressure-resistant glass 124 facing a courtyard 122 of a structure 120 may be used as the water-blocking member. Specifically, the pressure-resistant glass 124 has water-blocking properties and pressure resistance (water pressure resistance). This pressure-resistant glass 124 is fitted into a window frame 126 facing the courtyard 122. By surrounding the courtyard 122 with these pressure-resistant glasses 124, a water storage space 34 is formed in the courtyard 122.

[0078] The pressure-resistant glass 124 is not limited to glass, but also includes transparent resin glass such as acrylic glass, etc. The pressure-resistant glass 124 may be of a fixed type or an openable type.

[0079] Although not shown in the drawings, the water-blocking member may be a waterproof door, etc. Furthermore, the water storage space may be formed by appropriately combining the various water-blocking members described above.

[0080] In the first embodiment, the drain pipes 48, 54 are connected to the water storage space 34 via the courtyard drain pipe 52. However, it is not necessary to connect a drain pipe to the water storage space. If a drain pipe is not connected to the water storage space, rainwater stored in the water storage space is drained, for example, by a drain hose attached to the water storage space.

[0081] In the first embodiment, the structure 20 is formed in a rectangular ring shape in a plan view. However, for example, as in a modified example shown in Fig. 8, the structure 130 of the structure 10 may be formed in a C-shape (U-shape) having an opening 132 in a plan view.

[0082] A courtyard 134 is formed inside the structure 130. In this case, a water storage space can be formed in the courtyard 134 by sealing off the opening 132 with the above-mentioned undulating water shielding plate 110 (see FIG. 6) or other water shielding member. A plurality of rooftop drainage outlets 42 are formed on the roof 130R of the structure 130.

[0083] Furthermore, in the first embodiment, the control unit 70 operates the waterproof shutter 30 and the opening / closing member 60 based on a precipitation forecast. However, the control unit 70 may operate the waterproof shutter 30 and the opening / closing member 60 based on the actual amount of precipitation in the area where the structure 10 is located. Furthermore, the waterproof shutter 30 and the opening / closing member 60 can also be operated by an operation button or the like.

[0084] In the first embodiment, the drain pipe 54 is opened and closed by the opening and closing member 60. However, the opening and closing member may also be used to open and close the courtyard drain pipe 52 and the drain pipes 48 and 54 downstream of the courtyard drain outlet 50. In addition, the opening and closing member 60 may be omitted as appropriate.

[0085] Furthermore, in the first embodiment, rainwater that falls on the rooftop 20R of the structure 20 is configured to be stored in the water storage space 34. However, the rainwater that falls on the rooftop 20R of the structure 20 may be drained into the public storm sewer 14, for example, without being stored in the water storage space 34.

[0086] In the first embodiment, the ground of the courtyard 12 is exposed. However, for example, a concrete floor (concrete floor) may be formed in the courtyard to increase the efficiency of rainwater storage in the water storage space formed in the courtyard.

[0087] In addition, in the first embodiment, the courtyard 12 does not have a roof, but the courtyard may have a roof. In this case, for example, rainwater is supplied from the roof to the courtyard (water storage space) through a rain gutter.

[0088] Furthermore, the first embodiment can be applied to various structures such as apartment buildings, public facilities, stadiums, factories, etc.

[0089] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modified examples may be used in appropriate combination, and it goes without saying that the present invention can be implemented in various forms as long as it does not deviate from the gist of the present invention. [Explanation of symbols]

[0090] 10 Structures 12 Courtyard 18 Drain pipe 20 Structure 30 Waterproof shutter (waterproof material) 32 Storage section 34 Water storage space 48 Drain pipe 52 Courtyard drain pipe (drain pipe) 54 Drain pipe 60 Opening and closing member 88 Drain pipe 102 Storage unit 110 Water shielding plate (water shielding material) 120 Structure 122 Courtyard 124 Pressure-resistant glass (water-blocking material) 130 Structure 134 Courtyard

Claims

1. A structure having an open or covered courtyard and exterior materials facing the courtyard; a water-blocking member that surrounds the courtyard and forms a water storage space in the courtyard; a housing portion that houses the water-blocking member; A structure comprising:

2. The water-blocking member includes at least one of a waterproof shutter and a water-blocking plate. The structure of claim 1 .

3. A structure having an open or covered courtyard and an exterior material facing the courtyard; a water-blocking member that surrounds the courtyard and forms a water storage space in the courtyard; Equipped with The water-blocking member includes at least one of a waterproof shutter and a water-blocking plate. structure.

4. A structure having an open or covered courtyard and an exterior material facing the courtyard; a water-blocking member that surrounds the courtyard and forms a water storage space in the courtyard; Equipped with The water-blocking member includes pressure-resistant glass facing the courtyard. structure.

5. A drainage pipe connected to the courtyard for draining rainwater from the courtyard; An opening / closing member provided on the drain pipe for opening and closing the drain pipe; The structure according to any one of claims 1 to 4, comprising:

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