JP2000045372A - Rain water permeation basin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide good rain water permeation performance and prevent the run-off of surrounding sediment by forming a bottom wall and a side wall of the main body of a basin with an expansive board of water permeable glass fiber-reinforced polyolefin-based stampable sheet. SOLUTION: A basin is formed with a basin main body 1, adjuster 2 and lid 3. And a bottom wall 11, column member 12, side wall member 13 and adjuster receiving frame 14 are assembled to a hollow, almost cubical shape. It is formed with expansive boards of the wall member 11, 13 and water permeable glass fiber-reinforced polyolefin-based stampable sheet. Also, the rate of water permeability of the expansive board is in the range of 1.5 to 5.0 ml/ min.cm2. Therefore, rain water flowed from a rain water inlet pipe 5 is filtered by a filter medium 4a of a filter 4 with dust removed and only clean rain water is stored in the main body 1 of basin. Next, stored rain water W permeates the wall members 11, 13 at an adequate rate of water permeability and then permeates underground. If the main body 1 is full, then water is drained by a discharge pipe 6. In this way, the rate of water permeability becomes adequate and thus any displacement of permeation basin can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater infiltration basin in which rainwater falling on a house or the like is introduced into a basin and penetrates into the ground.

[0002]

2. Description of the Related Art In an urbanized area where there are few unpaved roads and vacant spaces, rainwater falling on houses, parking lots, roads, etc. flows into rivers and the like through gutters without penetrating into the ground. There is a risk that a large amount of rainwater will concentrate on the river, exceed the capacity of the river in a short time, and cause a so-called urban flood.

Further, in an urbanized area where rainwater hardly penetrates into the ground, if a factory or the like pumps and uses a large amount of groundwater, it is a major cause of land subsidence.

[0004] Under such circumstances, a rainwater infiltration basin for permeating rainwater falling on a house or the like into the ground has been buried in residential land. In general, this rainwater infiltration basin is a bucket-shaped basin in which a number of water-permeable holes are drilled in the bottom wall and side walls, and rainwater flowing into the basin from an inflow pipe connected to the side wall passes through the water-permeable holes to reach the ground. It is designed to penetrate inside.

[0005]

However, in the above-described rainwater infiltration basin, since a large amount of rainwater flows out from the water permeation hole into the surrounding ground, the soil around the rainwater infiltration basin gradually flows down with the rainwater and the voids Is formed, and there is a problem that the rainwater infiltration basin is tilted or displaced.

The above-mentioned rainwater infiltration basin is formed of a thermoplastic synthetic resin, but is relatively large and heavy.
There was also a problem that it was difficult to handle and carry.

The present invention has been made in view of the above problems, and has as its object to provide good rainwater penetration performance since the bottom wall and the side wall of the box body have an appropriate amount of water permeation. An object of the present invention is to provide a lightweight rainwater infiltration basin that does not have to worry about eroding soil.

[0008]

According to a first aspect of the present invention, there is provided a rainwater infiltration basin according to the first aspect of the present invention, wherein a bottom wall and / or a side wall of the basin body is made of a glass fiber reinforced polyolefin-based material having water permeability. It is characterized by being composed of an expandable plate of a stampable sheet.

The rainwater infiltration basin according to claim 2 is characterized in that the water permeation amount of the expansion plate is 1.5 to 5.0 ml / min · cm ² , A rainwater infiltration basin according to claim 4, wherein a cylindrical adjuster is connected to the upper opening of the basin main body, and a diameter of the adjuster is set to a diameter of the adjuster. The length or diameter of one side of the box body is larger than that of the box body.

[0010] The expansion plate of the glass fiber reinforced polyolefin stampable sheet is permeable to water and the amount of water permeation is just enough to fit into the rainwater infiltration basin.
When the bottom wall and / or side wall of the basin is composed of the expansion plate as in the case of a rainwater infiltration basin, the rainwater flowing into the inside of the basin passes through the bottom wall and / or the side wall and enters an appropriate amount into the surrounding ground. It will gradually penetrate. Therefore, the rainwater infiltration basin according to claim 1 has no fear that surrounding soil is washed away by the infiltrating rainwater, and can exhibit good rainwater infiltration performance. In this case, if crushed stone is buried around the main body of the basin, the effect of preventing soil loss and the performance of rainwater penetration will be further improved.
In addition, the rainwater infiltration basin according to claim 1 using the expandable plate of the stampable sheet has a low specific gravity of the expandable plate, is lightweight, is easy to handle and carry, and has good burying workability.

As is well known, a stampable sheet has good moldability, and its expansion plate is lightweight and has high strength. Therefore, it has been rapidly spread in recent years as a material for automobile parts. Has found that the expansion plate of the stampable sheet has a water permeability (amount of water permeation) suitable for the rainwater infiltration basin, and completed the present invention by applying this to the rainwater infiltration basin.

More specifically, the water permeability of the expansion plate is preferably in the range of 1.5 to 5.0 ml / min · cm ² , and the water permeability is 1.5 ml / min · cm ^2. c
If an expansion plate with less than m ² is used, the rainwater penetration performance will be significantly reduced. On the other hand, the water permeability is 5.0 ml / min · cm
^{Since the} expansion plate more than ² has insufficient internal void volume and insufficient strength, when such an expansion plate is used for the bottom wall or the side wall,
The strength of the rainwater infiltration basin is weakened, which may cause damage due to earth pressure.

Further, when a filter for filtering rainwater is attached to the upper opening of the main body of the basin as in the rainwater infiltration basin according to the third aspect, dirt, dust and the like contained in the rainwater are removed by the filter, and the filter is clean. Since only rainwater flows into the basin body, dust and dirt do not clog the internal space of the expansion plate when the rainwater passes through the expansion plate on the bottom and side walls.
Good rainwater penetration performance can be maintained over a long period of time.

Furthermore, as in the rainwater infiltration basin of claim 4, the length or diameter of one side of the basin body is set to be larger than the diameter of the cylindrical adjuster connected to the upper opening of the basin body. Even though the diameter of the upper end opening of the adjuster exposed to the ground is small, the capacity of the basin body is large, so a large amount of rainwater can be temporarily stored and permeated into the surrounding ground, and When burying crushed stone around,
It is economically advantageous because the amount of buried stone can be reduced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a rainwater infiltration basin according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the rainwater infiltration basin, FIG. Fig. 5 is an enlarged view of a portion surrounded by a circle in Fig. 3, Fig. 5 shows an adjuster receiving frame of the rainwater infiltration basin, (a) is a bottom view of the receiving frame, and (b)
6 is a side view of the receiving frame, FIG. 6 is a plan view of a bottom wall material of the rainwater infiltration basin, FIG. 7 is a partial perspective view of a column member of the rainwater infiltration basin, and FIG. 8 is a plan view of a filter support member.

As shown in FIG. 1, the rainwater infiltration basin of this embodiment has a basin body 1, a cylindrical adjuster 2, and a lid 3 as shown in FIG.
It is composed of The adjuster 2 adjusts the overall height of the rainwater infiltration basin, and is formed in a cylindrical shape from polypropylene or another thermoplastic resin. As shown in FIG. Is formed.

The lid 3 is made of a high-strength resin concrete or the like and is formed into a disk shape. As shown in FIG.
An annular convex portion 3a formed on the back surface of the peripheral portion of the lid 3 is fitted to the lid receiving groove 2a of the adjuster 2 so as to be openably and closably attached to the upper end opening of the adjuster 2. A pair of handles 3b,
3b is formed.

As shown in FIG. 2, the basin body 1 of the rainwater infiltration basin has a hollow substantially cubic shape formed by a bottom wall material 11, four pillars 12 at four corners, four side wall materials 13, and an upper adjuster receiving frame 14. The length of one side (the length of one side in a plane) is set to be larger than the diameter of the adjuster 2.

Both the bottom wall material 11 and the side wall material 13 are made of a water-permeable glass fiber reinforced polyolefin stampable sheet expansion plate. This expansion plate is formed by heating and pressing a stampable sheet in which glass fibers are dispersed using a polyolefin such as polypropylene or polyethylene as a matrix resin and then expanded in the thickness direction.

In particular, a stampable sheet in which glass fibers are dispersed by about 25 to 50% by weight using polypropylene as a matrix resin is expanded by about 1.5 to 5 times in the thickness direction to form a stampable sheet having a basis weight of 600 to 6000 g / m 2. The expansion plate having a thickness of about ² and a thickness of about 7 to 22 mm is lightweight and has high strength, and 1.5 to 5.0 ml suitable for a rainwater infiltration basin.
/ Min · cm ² , the bottom wall material 1
It is very suitable as 1 or the side wall material 13. The stampable sheet may be manufactured by any of a lamination method, a wet fiber dispersion method, and a dry fiber dispersion method.

As described above, the water permeability of the expansion plate is 1.5 to
Is preferably in the range of 5.0ml / min · cm ^2, the water permeability is to use a less expansion board than 1.5ml / min · cm ² as the bottom wall member 11 and sidewall members 13, the Masumoto body 1 rainwater penetration Inconvenience such as a significant decrease in performance occurs. On the other hand, an expansion plate having a water permeability of more than 5.0 ml / min · cm ² has too much internal void space and lacks strength. Therefore, when such an expansion plate is used as the bottom wall material 11 or the side wall material 13, The strength of the basin body 1 is weakened, and the basin body 1 may be damaged by earth pressure.

As shown in FIG. 6, at the four corners of the bottom wall member 11 made of the above-mentioned expansion plate of the box body 1, there are formed concave portions 11a for erecting the column members 12, as shown in FIG. To
The column members 12 are erected on the concave portions 11a at the four corners, respectively, and are adhered and fixed with an adhesive. As shown in FIG. 6, fitting grooves 11b are formed along the four sides of the bottom wall member 11, and as shown in FIG.
Are fitted in the respective fitting grooves 11b and are fixedly adhered with an adhesive.

The column member 12 is formed of a synthetic resin having a high strength such as ABS or reinforced polyvinyl chloride. As shown in FIG. The fitting grooves 12a are formed over the entire length in the longitudinal direction. Then, as shown in FIG. 2, both side edges of the side wall member 13 are fitted into the opposed fitting grooves 12a, 12a of each column member 12, and are fixedly bonded with an adhesive.

The adjuster receiving frame 14 mounted on the column member 12 and the side wall member 13 is made of a synthetic resin having the same high strength as the column member 12, and has a circular opening 14a in the center as shown in FIG. It is formed into a square plate (a square plate having the same size as the bottom wall material 11),
The length of one side thereof is larger than the diameter of the adjuster 2, and an annular ridge 14b provided at the edge of the opening 14a is formed with an annular receiving groove 14c for receiving the lower end of the adjuster 2. . As shown in FIG. 5, a concave portion 14d is formed on the back surface of each of the four corners of the adjuster receiving frame 14, and a fitting groove 14 is formed on the back surface of the receiving frame 14.
e is formed along four sides. The recesses 14d at the four corners are placed on the upper ends of the pillars 12 and are fixed with an adhesive, and the upper edges of the four side walls 13 are fitted into the fitting grooves 14e and fixed with the adhesive. As a result, the substantially cubic cell body 1 having a hollow structure is assembled. still,
14f is a rib for increasing the strength of the adjuster receiving frame 14.

The lower end of the adjuster 2 is fitted into the annular receiving groove 14c of the adjuster receiving frame 14 of the box body 1 assembled as described above, and is fixed by an adhesive.
Then, the opening 1 of the adjuster receiving frame 14 of the basin body 1
As shown in FIG. 3, a filter 4 for filtering rainwater is attached to 4a.

As shown in FIGS. 2 to 4, the filter 4 includes a filter material 4a in which several water-permeable sheets such as nonwoven fabrics are stacked,
And a water-supporting support 4b for supporting the filter medium 4a. The support 4b is a circular support by combining two half-shaped support bodies 40b each having a circular saw shape as shown in FIG. It was a tool. Such a filter 4 is shown in FIGS.
As shown in FIG. 7, the support 4b is mounted so as to cover the opening 14a by locking the peripheral portion of the support 4b to the inner peripheral edge of the annular raised portion 14b of the adjuster receiving frame 14. Although a circular saw-shaped support tool that is formed in a circular shape from the beginning may be mounted, when the support tool half 40b is divided into two parts, there is an advantage that the mounting operation is easy.

As shown in FIG. 3, in the rainwater infiltration basin having the above structure, the height of the entire basin is adjusted by the adjuster 2 so that the lid 3 and the ground GL are flush with each other. A rainwater inflow pipe 5 and a rainwater outflow pipe 6 are connected to a connection port formed in a wall, and crushed stones (not shown) are preferably put around the cell body 1 and buried in the ground.

When the rainwater infiltration basin is buried and constructed as described above, the rainwater flowing from the rainwater inflow pipe 5 is filtered by the filter medium 4a of the filter 4, and the trash and dust contained in the rainwater are removed. The rainwater W temporarily stored in the basin main body 1 causes the bottom wall material 11 and the side wall material 13 made of a permeable expansion plate to be 1.5 to
It permeates at an appropriate water permeability of about 5.0 ml / min · cm ² and penetrates into the surrounding ground. When the basin body 1 is full of rainwater, such as during a heavy rainfall, excess rainwater is drained through the rainwater outflow pipe 6.

Since the rainwater infiltration basin has an appropriate amount of water permeation as described above, it can exhibit good rainwater permeation performance, and can prevent the surrounding soil from being washed away by the permeated and permeated rainwater. . Therefore, it is possible to sufficiently eliminate the disadvantage that the surrounding soil is washed away along with a large amount of rainwater flowing out from the hole of the basin wall as in the conventional rainwater infiltration basin, and the rainwater permeation basin is tilted or displaced.

In addition, since the rainwater infiltration basin uses a lightweight stampable sheet expansion plate as the bottom wall material 11 and the side wall material 13, it is easy to handle and carry, and has good embedding workability. In addition, since the expansion plate has high strength, the fear of breakage due to earth pressure is eliminated.

Further, in this rainwater infiltration basin, since the capacity of the underground basin main body 1 is large even if the diameter of the upper end opening of the adjuster 2 exposed to the ground is small, a large amount of rainwater is temporarily stored to surround the basin. In addition to being able to penetrate the ground, there is an advantage that the amount of crushed stone buried around the main body of the basin can be reduced.

In the above embodiment, the bottom wall material 1
Although the expansion plate of the stampable sheet is used for both the side wall member 1 and the side wall member 13, an expansion plate may be used for either the bottom wall member 11 or the side wall member 13. In the above-described embodiment, the bottom wall member 11 and the side wall member 13 use flat expansion plates. However, the present invention is not limited to the flat expansion plate. For example, an expansion plate curved in an arc shape is used as the side wall member 13. Then, the side wall of the box body 1 may be formed in a cylindrical shape, and may be a closed-end box-shaped box body having a diameter larger than that of the adjuster 2.

[0034]

According to the rainwater infiltration basin of the present invention, since the bottom wall and / or the side wall of the basin body formed by the expandable plate of the stampable sheet have an appropriate amount of water permeation, the permeation and permeation of the surrounding soil together with the permeated and permeated rainwater are achieved. However, there is a remarkable effect that a disadvantage that the rainwater infiltration basin is tilted or displaced due to erosion can be eliminated. In addition, since the expansion plate is lightweight and has high strength, it is easy to handle and carry, has good embedding workability, and has an effect of being hardly damaged even when subjected to earth pressure. Furthermore, a rainwater infiltration basin in which the length or diameter of one side of the basin body is larger than the diameter of the adjuster can temporarily store a large amount of rainwater and allow it to permeate appropriately, and preferably the amount of crushed stone buried in the surrounding area This also has the effect of reducing the number of times.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rainwater seepage measure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the rainwater seepage measure.

FIG. 3 is a sectional view showing a use state of the rainwater infiltration basin.

FIG. 4 is an enlarged view of a portion surrounded by a circle in FIG. 3;

5A and 5B show an adjuster receiving frame of the rainwater infiltration basin, wherein FIG. 5A is a bottom view of the receiving frame and FIG. 5B is a side view of the receiving frame.

FIG. 6 is a plan view of a bottom wall material of the rainwater infiltration basin.

FIG. 7 is a partial perspective view of a column member of the rainwater infiltration basin.

FIG. 8 is a plan view of a filter supporting member of the rainwater infiltration basin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Masu main body 11 Bottom wall material 12 Column material 13 Side wall material 14 Adjuster receiving frame 14a Opening 2 Adjuster 3 Lid 4 Filter 4a Filter material 4b Supporting tool

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoto Ishikawa 2-3-13 Azuchicho, Chuo-ku, Osaka City Inside Takiron Co., Ltd. (72) Satoru Matsumoto 2-3-13 Azuchicho, Chuo-ku, Osaka City F-term in Takiron Co., Ltd. (reference) 2D063 AA14 AA15 DA04 DB04

Claims (4)

[Claims] 1. A rainwater infiltration basin characterized in that a bottom wall and / or a side wall of the basin main body is made of a water-permeable glass fiber reinforced polyolefin-based stampable sheet expansion plate. 2. The expansion plate has a water permeability of 1.5 to 5.0 ml / m.
The rainwater infiltration basin according to claim 1, wherein the basin is in cm ² . 3. The stormwater infiltration basin according to claim 1, wherein a filter for filtering rainwater is attached to an upper opening of the basin body. 4. A cylindrical adjuster is connected to an upper opening of the box body, and a length or a diameter of one side of the box body is larger than a diameter of the adjuster.
A rainwater infiltration basin according to any one of claims 3 to 4.