JP7562034B1 - Exterior - Google Patents

Abstract

[Problem] The object of the present invention is to provide an attractive exterior structure that can prevent inland flooding. [Solution] The exterior structure (1) comprises a water tank (38), a recess (14) formed in a concave shape in the ground of the garden, an overflow basin (42) buried in the ground of the recess (14), a rainwater guide path (30) that guides rainwater that falls on the roof of a house (3) to the water tank (38) and the overflow basin (42) and guides rainwater that overflows from the water tank (38) when the water tank (38) is full to the overflow basin (42), and a catchment basin (50) buried in the ground of the recess (14) at a position away from the overflow basin (42). [Selected Figure] Figure 1

Description

The present invention relates to exterior structures.

Patent Document 1 discloses a reverse reflux purification device that removes impurities from domestic wastewater. The reverse reflux purification device is equipped with a purification mechanism, an open channel structure, and a retention basin mechanism. The purification mechanism is a manhole structure located upstream into which the water to be treated, such as various types of domestic wastewater, flows and is purified through settling and filtration. The retention basin mechanism is located downstream of the open channel structure, which allows for planting. The retention basin mechanism purifies the water to be treated by contacting it with air after it has been purified by the purification mechanism.

Patent Document 2 discloses a technology in which a water intake device installed midway through a downspout divides rainwater flowing down from the downspout above the water intake device into two channels: the downspout below the water intake device and a tank. When the tank becomes full of rainwater, the rainwater in the water intake device overflows from the tank into the downspout below. During rainy weather, after the tank is full, the amount of water discharged from the downspout into the sewer increases, and a full tank can lead to inland flooding.

Publication No. 3016288 JP 2015-1057 A

The present invention was made in consideration of the above circumstances, and the object of the present invention is to provide an attractive exterior structure that can prevent inland flooding.

The reference numbers in parentheses below refer to Figures 1 to 4.

In order to solve the above problems, an exterior structure (1) constructed outside a house (3) is provided.
The exterior structure (1) is
A water tank (38) for storing rainwater;
A recess (14) formed in a concave shape on the ground of a garden outside the house (3);
an overflow basin (42) that is buried in the ground of the recess (14), is partially exposed above the ground, has an overflow outlet (42a) in the exposed part, collects rainwater up to the overflow outlet (42a), and overflows the rainwater from the overflow outlet (42a) into the recess (14);
A rainwater guideway (30) that guides rainwater that falls on a carport or the roof of the house (3) to the water tank (38) and the overflow basin (42) and guides rainwater that overflows from the water tank (38) when the water tank (38) is full to the overflow basin (42);
a catchment basin (50) that is buried in the ground of the recess (14) at a position away from the overflow basin (42), is partially exposed above the ground, has a water intake (50a) on the exposed part, and takes in and stores rainwater that has been stored in the recess (14) up to the water intake (50a) through the water intake (50a);
Equipped with.

According to the above , during rainy weather, the rainwater guide path (30) guides rainwater to the water tank (38), so that the rainwater is stored in the water tank (38). Rainwater that does not flow into the water tank (38) is guided by the rainwater guide path (30) to the overflow manhole (42) and stored in the overflow manhole (42). After the water tank (38) is full, rainwater that overflows from the water tank (38) is also guided by the rainwater guide path (30) to the overflow manhole (42) and stored in the overflow manhole (42). Even if the rainwater in the overflow manhole (42) overflows from the overflow outlet (42a) of the overflow manhole (42), the rainwater is stored in the recess (14). When the water level of the rainwater inside the recess (14) reaches the intake (50a) of the catchment basin (50), the rainwater flows through the intake (50a) into the catchment basin (50) and is stored in the catchment basin (50). Storing rainwater in four locations, the water tank (38), the overflow basin (42), the recess (14), and the catchment basin (50), contributes to reducing the amount of rainwater discharged into the sewer system. Therefore, the exterior structure (1) contributes to preventing inland flooding.
Since a portion of the rainwater inside the recess (14) seeps into the ground, the amount of rainwater discharged into the sewer system is reduced. Thus, the exterior structure (1) contributes to preventing inland flooding.
When it rains, rainwater collects in the recess (14), making it look like a pond has appeared. If the rain continues to fall, you can see the water flowing from the overflow basin (42) to the catchment basin (50). After the rain stops, the rainwater in the recess (14) seeps into the ground or evaporates, making the pond look like it has dried up and disappeared. These things contribute to improving the appeal of the exterior structure (1).
The rainwater stored in the water tank (38) can be used, for example, for cleaning, watering plants, or for daily life during a water outage.

In the exterior structure (1),
The recess (14) may have a bottom that slopes downward from the overflow basin (42) towards the catch basin (50).

According to the above , since the bottom of the recess (14) slopes downward from the overflow box (42) toward the catchment box (50), when it starts to rain and rainwater starts to overflow from the overflow box (42), the water flow from the overflow box (42) toward the catchment box (50) is visible. Even if rainwater accumulates in the recess (14), if the recess (14) is shallow, the water flow from the overflow box (42) toward the catchment box (50) is visible. Such water flow during rainy weather contributes to improving the appeal of the exterior structure (1).
Since debris such as dead leaves contained in rainwater tends to accumulate near the catchment basin (50) in the recess (14), the recess (14) is easy to clean.

In the exterior structure (1),
The depth from the intake (50a) to the bottom of the catchment basin (50) may be greater than the depth from the overflow outlet (42a) to the bottom of the overflow basin (42).

According to the above , the rainwater inside the recess (14) is prone to become mixed with mud, etc., and since the catchment basin (50) is deeper than the overflow basin (42), a large amount of mud in the rainwater accumulates in the catchment basin (50).

The exterior structure (1) is
A drainage pipe (52) is buried underground from the catchment basin (50) to the sewer and is connected to the catchment basin (50) and the sewer.
The present invention may also include:

According to the above , since the drain pipe (52) is connected to the catchment basin (50) and the sewer, the rainwater stored in the catchment basin (50) is discharged into the sewer.

The exterior structure (1) is
Plants (16) planted at the bottom of the recess (14) or around the recess (14), or both.
The present invention may also include:

As described above , since the plants (16) are planted at the bottom of the recess (14) or around the recess (14), or both, rainwater can easily infiltrate into the ground. By allowing the rainwater to infiltrate into the ground, the amount of rainwater discharged into the sewer system is reduced, and the rainwater pollution is eliminated. Therefore, the exterior structure (1) contributes to preventing inland flooding and reducing the environmental load.

The exterior structure (1) is
The recess (14) may be provided with natural grass planted at the bottom or around the recess (14) or both.

According to the above , since the natural grass is planted at the bottom of the recess (14) or around the recess (14), or both, rainwater can easily penetrate into the ground. Therefore, the exterior structure (1) contributes to preventing inland flooding and reducing environmental load.

The exterior structure (1) is
Crushed stones (18) piled on top of the overflow basin (42)
The present invention may also include:

As described above , the crushed stones (18) are piled on top of the overflow basin (42), and the overflow basin (42) is hidden under the crushed stones (18), improving the design of the exterior structure (1). In addition, when it rains, rainwater appears to spring from the crushed stones (18), which contributes to improving the appeal of the exterior structure (1).

The exterior structure (1) is
Crushed stones (20) piled on top of the catchment basin (50)
The present invention may also include:

As described above , the crushed stones (20) are piled on top of the catchment basin (50), and the catchment basin (50) is hidden under the crushed stones (20), improving the design of the exterior structure (1). In addition, when it rains, rainwater appears to seep in between the crushed stones (20), which contributes to improving the appeal of the exterior structure (1).

In the exterior structure (1),
The depth from the ground around the recess (14) to the overflow outlet (42a) may be equal to the depth from the ground around the recess (14) to the intake (50a).

According to the above , the water level of rainwater stored in the recess (14) is adjusted to the depth of the overflow port (42a) and the water intake port (50a).

In the exterior structure (1),
The rainwater guideway (30)
An upper downspout (32a) attached to the exterior wall of the house (3) so as to extend vertically along the exterior wall;
a branch joint (34) connected to a lower end of the upper downspout (32a) and the water tank (38);
A lower downspout (32b) attached to the outer wall so as to extend vertically along the outer wall from the branch joint (34) to the ground;
and
The branch joint (34) guides rainwater flowing down the upper downspout (32a) to the lower downspout (32b) and the water tank (38), and may also cause rainwater to overflow from the water tank (38) into the lower downspout (32b) when the water tank (38) is full.

According to the present invention, the exterior structure contributes to preventing inland flooding. The exterior structure has a high level of appeal.

FIG. 1 is a cross-sectional view showing a schematic view of the exterior structure. FIG. 2 is a plan view of the exterior structure. FIG. 3 is a cross-sectional view of a branch joint provided midway through a downspout. FIG. 4 is a cross-sectional view showing a schematic configuration of the exterior of a modified example.

The following describes embodiments with reference to the drawings. The features and technical effects of the embodiments can be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. The drawings are provided for illustrative purposes only, and therefore the scope of the present invention is not limited to the illustrations in the drawings.

＜1. Exterior＞
Fig. 1 is a cross-sectional view showing a schematic of the exterior structure 1 during rainy weather. Fig. 2 is a plan view of the exterior structure 1. The exterior structure 1 is constructed outside the house 3 on a site on which the house 3 is built. The exterior structure 1 includes a garden, a rainwater infiltration zone 12, a dry pond 14, plantings 16, a first crushed stone 18, a second crushed stone 20, a rainwater guideway 30, a water tank 38, an underground pipe 40, an overflow basin 42, a catchment basin 50, and a drainage pipe 52.

The garden is constructed outside the house 3 within the site. The house 3 is a detached house or an apartment building.

The rainwater infiltration zone 12 is created by preparing the ground of the garden so that rainwater can infiltrate the ground of the garden appropriately. For example, the rainwater infiltration zone 12 may be created by excavating a part or the whole of the garden and backfilling the excavated area with soil of appropriate permeability. The backfilled soil may be compacted to adjust the permeability of the soil. The soil backfilled in the excavation area may include excavated soil (soil generated by excavation), black soil, Kanuma soil, Akadama soil, Arakida soil, Masago soil, compost, peat moss, vermiculite, smoked charcoal, perlite, zeolite, leaf mold, large gravel, medium gravel, or fine gravel, or two or more of these. Two or more of the above soils may be layered in the excavation area. Excavated soil refers to soil and sand generated by excavation. The excavated soil may be sieved. A permeable sheet may be laid at the bottom of the excavation area, and the soil may be backfilled on top of the permeable sheet. If the original ground of the garden has a geology that allows rainwater to infiltrate appropriately, the original ground may be leveled to create a rainwater infiltration zone 12. Grass may be planted in the rainwater infiltration zone 12. The grass may be either natural grass or artificial grass.

The dry pond 14 is a recess formed in a concave shape in the rainwater infiltration zone 12. The bottom of the dry pond 14 slopes downward from a shallow point of the dry pond 14 to a deep point of the dry pond 14. The deepest point of the dry pond 14 is, for example, 200 mm deep from the ground surrounding the dry pond 14. Grass may be grown on the bottom of the dry pond 14. Stones such as large pebbles, medium sized pebbles, or fine gravel may be deposited on the bottom of the dry pond 14. In FIG. 2, a dot pattern is drawn in the area where the dry pond 14 has been created. Contour lines are drawn in the area where the dry pond 14 has been created so that the dot pattern becomes darker as the bottom of the dry pond 14 becomes deeper.

The first crushed stone 18 is piled in a shallow part of the dried-up pond 14. The second crushed stone 20 is piled in a deep part of the dried-up pond 14. The crushed stones 18, 20 may be piled up and spread to the outside of the dried-up pond 14. There is no particular limitation on the stones used for the crushed stones 18, 20, but for example, decorative stones may be used for the crushed stones 18, 20.

During rainy weather, rainwater flows into the dry pond 14 and accumulates there up to a specified water level, and water that exceeds the specified water level flows out of the dry pond 14. During rainy weather, water appears to spring from the first crushed stone 18 into the dry pond 14. During rainy weather, water in the dry pond 14 appears to flow into the second crushed stone 20. When the rain stops, the water accumulated in the dry pond 14 evaporates or seeps into the ground. Therefore, the water in the dry pond 14 dries up except during rainy weather and for a specified period of time thereafter. The route that rainwater takes to flow into and out of the dry pond 14 during rainy weather will be described in detail later.

The plants 16 are planted in the rainwater infiltration zone 12. Specifically, the plants 16 are planted around the dry pond 14 or at the bottom of the dry pond 14.

The route that rainwater takes during rainy weather will be explained in detail.
The rainwater path is composed of a rainwater guideway 30, a water tank 38, an overflow basin 42, a dry pond 14, a catchment basin 50 and a drainage pipe 52.

The rainwater guideway 30 guides rainwater that falls on the roof of the house 3 to an above-ground water tank 38 and an underground overflow basin 42, and guides rainwater that overflows from the water tank 38 when the water tank 38 is full to the overflow basin 42. The rainwater guideway 30 includes a horizontal gutter 31, a vertical gutter 32, a branch joint 34, a connecting pipe 36, and an underground pipe 40.

The gutter 31 is attached along the eaves of the roof of the house 3. Rainwater that falls on the roof flows into the gutter 31. The gutter 31 collects the rainwater that flows down from the roof and guides it to the downspout 32.

The downspout 32 is attached to the exterior wall of the house 3 so as to extend vertically along the exterior wall. The upper end of the downspout 32 is connected to the horizontal gutter 31 via a call pipe and a water collector. The downspout 32 extends underground, and the lower end of the downspout 32 is connected to one end of an underground pipe 40. The underground pipe 40 is buried in the ground in the yard from the lower end of the downspout 32 to a shallow part of the dried-up pond 14, and the other end of the underground pipe 40 is connected to an overflow basin 42. The underground pipe 40 may be inclined downward from the downspout 32 to the overflow basin 42. The downspout 32 guides rainwater flowing from the horizontal gutter 31 to the underground pipe 40 underground. The underground pipe 40 guides rainwater flowing from the downspout 32 to the overflow basin 42. The lower end of the downspout 32 may be directly connected to the overflow basin 42.

The branch joint 34 is provided midway between the upper end and the lower end of the downspout 32. The part of the downspout 32 above the branch joint 34 is called the upper downspout 32a, and the part below the branch joint 34 is called the lower downspout 32b. The branch joint 34 is connected to the lower end of the upper downspout 32a, connected to the upper end of the lower downspout 32b, and further connected to one end of the connecting pipe 36. The other end of the connecting pipe 36 is connected to the upper part of the water tank 38. The water tank 38 is installed on the ground in the garden near the outer wall of the house 3. The water tank 38 may be placed directly on the ground or on a pedestal on the ground. The water tank 38 is located at a position higher than the ground in the rainwater infiltration zone 12. The water tank 38 is a rainwater tank made of resin. The water tank 38 has a faucet 38a at the lower part of the side. When the faucet 38a is opened, the rainwater inside the water tank 38 is discharged through the faucet 38a. The water can be used for cleaning, watering plants, or for daily life during a water outage. The water tank 38 has an air vent on the upper part of its side or on its top surface. The position of the air vent is the maximum water level of the water tank 38. A filtration layer may be provided inside the water tank 38, and the rainwater stored in the water tank may be filtered by the filtration layer, and the filtered water may be discharged from the faucet 38a.

The branch joint 34 divides the rainwater flowing down the upper downspout 32a and directs it to the lower downspout 32b and the connecting pipe 36. When the water tank 38 is full, the water levels in the water tank 38 and the connecting pipe 36 reach the branch joint 34, causing the branch joint 34 to overflow the water in the connecting pipe 36 into the lower downspout 32b.

3 is a vertical cross-sectional view of the branch joint 34. As shown in FIG. 3, the branch joint 34 has an upper connection part 34a, an upper body 34b, a water distribution plate 34c, a lower body 34f, a branch port 34h, and a lower connection part 34g. The upper connection part 34a, the upper body 34b, and the lower connection part 41f are formed in a tubular shape. The upper connection part 41a is connected to the upper downspout 32a so as to hold the lower end of the upper downspout 32a. The upper body 34b is connected to the lower part of the upper connection part 34a. The water distribution plate 34c is provided in the perimeter hole 34e at the lower end of the upper body 34b. The water distribution plate 34c has a center hole 34d in its center and has multiple perimeter holes 34e around the center hole 34d. The lower body 34f is connected to the lower end of the upper body 34b. The branch port 34h is connected to the side of the lower body 34f. The branch port 34h is connected to one end of the connection pipe 36. The lower connection part 34g is inserted into the lower body 34f from the lower end of the lower body 34f until the height of the upper end of the lower connection part 34g reaches the height of the upper and lower middle part of the branch port 34h. The upper end of the lower connection part 34g is located below the maximum limit water level in the water tank 38 and above the position where the connection pipe 36 is connected to the water tank 38. The upper part of the part of the lower connection part 34g inserted into the lower body 34f is separated from the inner circumferential surface of the lower body 34f. The lower part of the part of the lower connection part 34g inserted into the lower body 34f is in close contact with the inner circumferential surface of the lower body 34f. The lower end of the lower connection part 34g is connected to the upper end of the lower downspout 32b.

Rainwater flowing down from the upper downspout 32a flows into the upper body 34b through the upper connection part 34a. The rainwater hits the water distribution plate 34c and is divided into the center and the periphery.
The rainwater separated in the center passes through center hole 34d of water dividing plate 34c, flows inside lower connection part 34g within lower body 34f, and further flows down into lower downspout 32b.
The rainwater divided to the periphery flows through the perimeter hole 34e of the water distribution plate 34c and flows to the outside of the lower connection part 34g in the lower body 34f. If the water tank 38 is not full, the rainwater that flows to the outside of the lower connection part 34g flows to the water tank 38 through the branch port 34h and the connection pipe 36. This allows the rainwater to accumulate in the water tank 38. The water level in the water tank 38 when it is full is determined by the height of the upper end of the lower connection part 34g. If the water tank 38 is full, the water level inside the water tank 38 and the connection pipe 36 reaches the upper end of the lower connection part 34g, so that the rainwater overflows from the outside to the inside of the lower connection part 34g. Therefore, most of the rainwater that flows from the upper downspout 32a into the branch joint 34 flows into the lower downspout 32b.

The water diversion plate 34c also functions as a strainer, and debris in the rainwater is captured by the water diversion plate 34c. If the upper connection part 34a is removed upward from the upper body 34b while the upper downspout 32a is still fitted into the upper connection part 34a, debris accumulated in the upper body 34b can be discharged. After debris is removed, the upper connection part 34a can be lowered to the upper body 34b below while the upper downspout 32a is still fitted into the upper connection part 34a, and connected to the upper body 34b.

As shown in Figures 1 and 2, the overflow manhole 42 is buried in the ground in a shallow part of the dried-up pond 14. The upper part of the overflow manhole 42 is exposed from the ground at the bottom of the dried-up pond 14. The outer shape of the overflow manhole 42 is cylindrical or rectangular prism-shaped, and the overflow manhole 42 is hollow. The upper end of the overflow manhole 42 may be a detachable cover for the manhole body below. The overflow manhole 42 has an overflow opening 42a at the upper end or side. If the overflow opening 42a is formed on the side of the overflow manhole 42, the overflow opening 42a is located away from the lower end of the overflow manhole 42 toward the upper end. The entire upper end of the overflow basin 42 may be open, and the opening may be an overflow outlet 42a. In this case, a punching plate, wire mesh, or strainer is installed at the opening to prevent the first crushed stone 18 described below from falling into the overflow basin 42. The overflow outlet 42a is not buried in the shallow part of the dried-up pond 14, but is exposed from the ground at the bottom of the dried-up pond 14. The depth of the overflow outlet 42a is, for example, 50 mm from the ground surrounding the dried-up pond 14. The overflow basin 42 is a non-permeable rainwater basin. The overflow basin 42 is made of resin, metal, reinforced concrete, or a composite of two or more of these. For example, the overflow basin 42 is made of polyvinyl chloride resin.

The overflow basin 42 is placed under the first crushed stone 18. The part of the overflow basin 42 that is exposed above the ground at the bottom of the dried-up pond 14 is hidden under the first crushed stone 18.

During rainy weather, rainwater flows into the overflow basin 42 through the downspout 32 and underground pipe 40. When the water level of the rainwater stored in the overflow basin 42 exceeds the overflow outlet 42a of the overflow basin 42, the rainwater is discharged from the overflow basin 42 through the overflow outlet 42a into the dry pond 14. The discharged rainwater appears to spring from the first crushed stone 18 into the dry pond 14.

The catchment basin 50 is buried in the ground at a deep part of the dry pond 14. The catchment basin 50 is located away from the overflow basin 42. The upper part of the catchment basin 50 is exposed from the ground at the bottom of the dry pond 14. The outer shape of the catchment basin 50 is cylindrical or rectangular prism-shaped, and the catchment basin 50 is hollow. The upper end of the catchment basin 50 may be a detachable cover for the basin body below. The catchment basin 50 has a water intake 50a at its upper end or on its side. When the water intake 50a is formed on the side of the catchment basin 50, the water intake basin 50a is located away from the lower end of the catchment basin 50 toward the upper end. The entire upper end of the catchment basin 50 may be open, and the opening may be the intake basin 50a. In this case, a punching plate, wire mesh, or strainer is installed at the opening to prevent the second crushed stones 20 described later from falling into the catchment basin 50. The intake basin 50a is not buried in the ground at a deep part of the dried-up pond 14, but is exposed from the ground at the bottom of the dried-up pond 14. The depth of the intake basin 50a is equal to the depth of the overflow basin 42a of the overflow basin 42. The depth of the intake basin 50a may be deeper than the depth of the overflow basin 42a of the overflow basin 42. The depth of the intake basin 50a is 50 mm from the ground around the dried-up pond 14. The depth from the intake basin 50a to the bottom of the catchment basin 50 is deeper than the depth from the overflow basin 42a of the overflow basin 42 to the bottom of the overflow basin 42. The catchment basin 50 is a non-permeable rainwater basin. The catchment basin 50 may be a permeable rainwater basin with permeation holes on the side or bottom. The catchment basin 50 is made of resin, metal, reinforced concrete, or a composite of two or more of these. For example, the catchment basin 50 is made of polyvinyl chloride resin.

When the water level of the rainwater that overflows from the overflow basin 42 into the dry pond 14 reaches the intake 50a of the catchment basin 50, the rainwater flows into the catchment basin 50 through the intake 50a. The depth of the intake 50a is deeper than the depth of the ground around the overflow basin 14, which is 0 mm, to prevent the rainwater from overflowing from the dry pond 14 onto the surrounding ground. The rainwater that flows into the catchment basin 50 is stored in the catchment basin 50.

The drain pipe 52 is buried underground from the catchment basin 50 to the sewer outside the site. One end of the drain pipe 52 is connected to the catchment basin 50, and the other end of the drain pipe 52 is connected to the sewer. The drain pipe 52 may be inclined downward from the catchment basin 50 toward the sewer. When the water level of the rainwater stored in the catchment basin 50 reaches the part where the drain pipe 52 is connected to the catchment basin 50, the rainwater flows from the catchment basin 50 into the drain pipe 52. The drain pipe 52 guides the rainwater to the sewer. One or more rainwater basins may be provided in the middle of the drainage pipe 52. The rainwater basin may be either permeable or non-permeable, and both permeable and non-permeable basins may be used.

2. Modified Examples
The following describes changes from the above-described embodiment. Any one of the changes (1) to (3) described below may be adopted, or two or more of the changes (1) to (3) may be combined and applied.

(1) The exterior structure 1 may have a carport. In this case, a rain gutter may be piped from the carport roof to the upper downspout 32a, and rain that falls on the carport may be guided to the upper downspout 32a by the rain gutter. Alternatively, the carport's downspout is piped from the carport roof to the ground along the pillars supporting the carport's roof, and the lower end of the downspout is connected to the underground pipe 40 through a second underground pipe. And, just as the water tank 38 is connected to the downspout 32 by the connecting pipe 36 and the branch joint 34, the carport's water tank is connected to the carport's downspout by the connecting pipe and the branch joint.

(2) As shown in FIG. 4, crushed stones 51 may be contained in a catchment basin 50. The catchment basin 50 functions as an infiltration basin. The catchment basin 50 may not be buried in the location where the catchment basin 50 is buried, and crushed stones 51 may be buried in that location, with the end of the drainage pipe 52 opening on the side of the hole where the crushed stones 51 are buried.

(3) As shown in FIG. 4, a permeation layer 15 made of crushed stone may be deposited under the bottom of the dry pond 14. The permeation layer 15 may be exposed at the bottom of the dry pond 14, or soil and sand may be deposited on the permeation layer 15. If soil is deposited on the permeation layer 15, grass may be grown on the soil. When the permeation layer 15 is formed, permeation holes may be formed on the side of the catchment basin 50, and rainwater that permeates the permeation layer 15 may seep into the catchment basin 50 through the permeation holes. If such a permeation layer 15 is formed, the water retention capacity of the rainwater permeation zone 12 will be increased. Note that the changes listed in (2) and the changes listed in (3) may be adopted together.

<3. Summary>
(1) During rainy weather, rainwater is guided to the water tank 38 by the rainwater guide path 30, and the rainwater is stored in the water tank 38. Rainwater that does not flow into the water tank 38 is guided to the overflow manhole 42 by the rainwater guide path 30, and the rainwater is stored in the overflow manhole 42. After the water tank 38 is full, rainwater that overflows from the water tank 38 is also guided to the overflow manhole 42 by the rainwater guide path 30, and the rainwater is stored in the overflow manhole 42. Even if the rainwater in the overflow manhole 42 overflows from the overflow outlet 42a of the overflow manhole 42, the rainwater is stored in the dry pond 14. When the water level inside the dry pond 14 reaches the intake 50a of the catchment basin 50, the rainwater flows through the intake 50a into the catchment basin 50 and is stored in the catchment basin 50. By storing rainwater in four places, the water tank 38, the overflow basin 42, the dry pond 14, and the catchment basin 50, the amount of rainwater discharged into the sewer system is reduced. Therefore, this exterior structure 1 contributes to preventing inland flooding.

(2) Because some of the rainwater inside the dry pond 14 seeps into the ground, the amount of rainwater discharged into the sewer system is reduced. This also contributes to preventing inland flooding.

(3) When it rains, rainwater is stored in the dry pond 14, making it appear as if a pond has appeared. If it continues to rain, you can see the water flowing from the overflow basin 42 to the collection basin 50. After the rain stops, the rainwater inside the dry pond 14 seeps into the ground or evaporates, making the pond appear to have dried up and disappeared. These things contribute to improving the appeal of the exterior structure 1.

(4) Because the bottom of the dry pond 14 slopes downward from the overflow basin 42 toward the collection basin 50, when it starts to rain and rainwater begins to overflow from the overflow basin 42, the water flow from the overflow basin 42 toward the collection basin 50 is visible. Even if rainwater collects in the recess 14, if the recess 14 is shallow, the water flow from the overflow basin 42 toward the collection basin 50 is visible. This type of water flow during rainy weather contributes to improving the appeal of the exterior structure 1.

(5) The slope of the bottom of the dry pond 14 allows debris such as dead leaves contained in rainwater to be collected near the catch basin 50. This makes it easy to clean the dry pond 14.

(6) Mud and other materials easily mix with the rainwater inside the dry pond 14, and because the catchment basin 50 is deeper than the overflow basin (42), a large amount of mud and other materials in the rainwater accumulates in the catchment basin 50.

(7) The drain pipe 52 is connected to the catchment basin 50 and the sewer, so that the rainwater stored in the catchment basin 50 is discharged into the sewer.

(8) Because the plants 16 are planted in the bottom of the dried-up pond 14 or around the dried-up pond 14, or both, rainwater can easily seep into the ground. By allowing the rainwater to seep into the ground, the amount of rainwater discharged into the sewer system is reduced and the rainwater is decontaminated. This prevents inland flooding and reduces the burden on the environment.

(9) Because natural grass is planted on the bottom of the pond 14, around the pond 14, or both, rainwater can easily seep into the ground. This prevents inland flooding and reduces the burden on the environment.

(10) Because the first crushed stones 18 are piled on top of the overflow basin 42, the overflow basin 42 is hidden under the first crushed stones 18, improving the design of the exterior structure 1. In addition, when it rains, rainwater appears to spring from the first crushed stones 18, which contributes to improving the appeal of the exterior structure 1.

(11) Because the second crushed stones 20 are piled on top of the catchment basin 50, the catchment basin 50 is hidden under the second crushed stones 20, improving the design of the exterior structure 1. In addition, during rainy weather, rainwater appears to seep in between the second crushed stones 20, which contributes to improving the appeal of the exterior structure 1.

(12) The depth from the ground surrounding the dry pond 14 to the overflow outlet 42a is equal to the depth from the ground surrounding the dry pond 14 to the water intake 0a, so the maximum water level of rainwater stored in the dry pond 14 is adjusted to the depth of the overflow outlet 42a and the water intake 50a.

(13) If House 3 is a wooden house, the energy used from the production to the disposal and disposal of wood is less than the energy used from the production to the disposal and disposal of metal materials or concrete materials. Therefore, House 3 contributes to the realization of a decarbonized society by promoting carbon neutrality, which reduces carbon dioxide emissions to virtually zero, and to the achievement of the Sustainable Development Goals (SDGs).

(14) As mentioned above, the exterior structure 1 contributes to reducing the burden on the environment and the sewer system. In turn, the exterior structure 1 contributes to creating a town where everyone can live safely and continue to live in a disaster-resistant manner.

1 Exterior 3 Housing 14 Dried pond (recess)
16 Planting 18 First crushed stone 20 Second crushed stone 30 Rainwater guideway 32 Downspout 32a Upper downspout 32b Lower downspout 34 Branch joint 38 Water tank 42 Overflow basin 42a Overflow outlet 50 Collection basin 50a Water intake 52 Drain pipe

Claims (9)

An exterior structure constructed outside a house,
A rainwater storage tank,
A recess formed in a concave shape on the ground of a garden outside the house;
An overflow basin is buried in the ground of the recess, is partially exposed above the ground, has an overflow outlet at the exposed part, stores rainwater up to the overflow outlet, and overflows the rainwater from the overflow outlet into the recess;
A rainwater guideway that guides rainwater that falls on a carport or the roof of the house to the water tank and the overflow basin and guides rainwater that overflows from the water tank due to the water tank being full to the overflow basin;
A catchment basin is buried in the ground of the recess at a position away from the overflow basin, is partially exposed above the ground, has a water intake at the exposed part, and takes in and stores the rainwater stored in the recess up to the water intake through the water intake;
Equipped with
This exterior structure is characterized in that the depth from the water intake to the bottom of the water collection basin is deeper than the depth from the overflow outlet to the bottom of the overflow basin . An exterior structure constructed outside a house,
A rainwater storage tank,
A recess formed in a concave shape on the ground of a garden outside the house;
An overflow basin is buried in the ground of the recess, is partially exposed above the ground, has an overflow outlet at the exposed part, stores rainwater up to the overflow outlet, and overflows the rainwater from the overflow outlet into the recess;
A rainwater guideway that guides rainwater that falls on a carport or the roof of the house to the water tank and the overflow basin and guides rainwater that overflows from the water tank due to the water tank being full to the overflow basin;
A catchment basin is buried in the ground of the recess at a position away from the overflow basin, is partially exposed above the ground, has a water intake at the exposed part, and takes in and stores the rainwater stored in the recess up to the water intake through the water intake;
Crushed stones piled on the overflow basin;
An exterior structure characterized by comprising: An exterior structure constructed outside a house,
A rainwater storage tank,
A recess formed in a concave shape on the ground of a garden outside the house;
An overflow basin is buried in the ground of the recess, is partially exposed above the ground, has an overflow outlet at the exposed part, stores rainwater up to the overflow outlet, and overflows the rainwater from the overflow outlet into the recess;
A rainwater guideway that guides rainwater that falls on a carport or the roof of the house to the water tank and the overflow basin and guides rainwater that overflows from the water tank due to the water tank being full to the overflow basin;
A catchment basin is buried in the ground of the recess at a position away from the overflow basin, is partially exposed above the ground, has a water intake at the exposed part, and takes in and stores the rainwater stored in the recess up to the water intake through the water intake;
Crushed stones piled on the catchment basin;
An exterior structure characterized by comprising: An exterior structure constructed outside a house,
A rainwater storage tank,
A recess formed in a concave shape on the ground of a garden outside the house;
An overflow basin is buried in the ground of the recess, is partially exposed above the ground, has an overflow outlet at the exposed part, stores rainwater up to the overflow outlet, and overflows the rainwater from the overflow outlet into the recess;
A rainwater guideway that guides rainwater that falls on a carport or the roof of the house to the water tank and the overflow basin and guides rainwater that overflows from the water tank due to the water tank being full to the overflow basin;
A catchment basin is buried in the ground of the recess at a position away from the overflow basin, is partially exposed above the ground, has a water intake at the exposed part, and takes in and stores the rainwater stored in the recess up to the water intake through the water intake;
Equipped with
An exterior structure characterized in that the depth from the ground surrounding the recess to the overflow outlet is equal to the depth from the ground surrounding the recess to the intake outlet . An exterior structure constructed outside a house,
A rainwater storage tank,
A recess formed in a concave shape on the ground of a garden outside the house;
An overflow basin is buried in the ground of the recess, is partially exposed above the ground, has an overflow outlet at the exposed part, stores rainwater up to the overflow outlet, and overflows the rainwater from the overflow outlet into the recess;
A rainwater guideway that guides rainwater that falls on a carport or the roof of the house to the water tank and the overflow basin and guides rainwater that overflows from the water tank due to the water tank being full to the overflow basin;
A catchment basin is buried in the ground of the recess at a position away from the overflow basin, is partially exposed above the ground, has a water intake at the exposed part, and takes in and stores the rainwater stored in the recess up to the water intake through the water intake;
Equipped with
The storm water guideway,
An upper downspout attached to the exterior wall of the house so as to extend vertically along the exterior wall;
A branch joint connected to a lower end of the upper downspout and the water tank;
A lower downspout is attached to the exterior wall so as to extend vertically along the exterior wall from the branch joint to the ground;
having
The branch joint guides rainwater flowing down the upper downspout to the lower downspout and the water tank, and allows rainwater to overflow from the water tank into the lower downspout when the water tank is full.
The exterior is characterized by: The exterior structure according to any one of claims 1 to 5 ,
An exterior structure characterized in that the recess has a bottom that slopes downward from the overflow box toward the collection box. The exterior structure according to any one of claims 1 to 5 ,
An exterior structure characterized by comprising a drainage pipe buried underground from the catchment basin to the sewer and connected to the catchment basin and the sewer. The exterior structure according to any one of claims 1 to 5 ,
An exterior structure characterized by having plants planted at the bottom of the recess, around the recess, or both. The exterior structure according to any one of claims 1 to 5 ,
The exterior structure is characterized by having natural grass planted at the bottom of the recess, around the recess, or both.

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