JP2003034970A - Rainwater storage/storage and infiltration tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rainwater storage and infiltration tank which is effective for reduction of transportation cost, simplification and speeding up of assembling, and is capable of following up variation in plane area and volume easily. SOLUTION: Face plate members 1, 2 have openings 11, 21 therein respectively and also at least two pairs of opposing sides of which two sides have concave parts 13, 23 and convex parts 14, 24 to correspond to each other respectively. Side plate members 3 have openings 31 therein, and are connected to one of the faces of the face plate members 1, 2 by means of tongue-and-groove joints.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater storage / storage infiltration tank. The rainwater storage / storage infiltration tank according to the present invention is
It includes both a rainwater storage tank that stores rainwater, and a rainwater storage and infiltration tank that temporarily stores rainwater and slowly infiltrates the stored rainwater into the ground for discharge.

[0002]

2. Description of the Related Art A rainwater storage and infiltration facility of this type temporarily stores collected rainwater, gently infiltrates the stored rainwater into the ground, and discharges the rainwater to prevent a rapid inflow of rainwater into a river. It is used by being buried in the ground for the purpose of adjustment, and various types have been conventionally proposed and put into practical use.

For example, Japanese Unexamined Patent Publication No. 10-237932 discloses a rainwater storage and infiltration tank in which a side wall member made of water-permeable concrete, a partition wall member, an upper floor plate member and the like are combined.

Further, Japanese Patent Laid-Open No. 2001-115508 discloses a rainwater storage structure constructed by laying water storage blocks.

Japanese Unexamined Patent Publication No. 2000-199246 discloses that box-shaped packing bodies are stacked upside down, and
Disclosed is a rainwater storage device that is connected to the top, bottom, left and right, and front and back by a connecting tool.

Further, Japanese Patent No. 2634385 discloses an underground water tank constructed by combining several types of concrete blocks having a unique structure.

However, in any of the above-mentioned conventional techniques, it is necessary to transport a member having a large volume and weight, or a bulky member to the site and combine them, resulting in a high transportation cost.

Moreover, a member having a large volume and weight, or a bulky member must be assembled on site, and in the assembly work such as connecting the members to each other by a connecting tool is required, and the assembly work is not easy. There were also points.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a rainwater storage / reservoir permeation tank that can be transported in a non-bulky manner and is therefore effective in reducing transportation costs.

Another object of the present invention is to provide a rainwater storage / reservoir permeation tank which can easily and rapidly perform an assembly operation.

Still another object of the present invention is to reduce the required number of components, reduce costs, facilitate assembly, and
It is an object of the present invention to provide a rainwater storage / reservoir permeation tank with a quick assembly.

Yet another object of the present invention is to provide a rainwater storage / reservoir permeation tank in which the width, depth and length can be freely changed to easily follow the difference in plane area and volume. .

[0013]

In order to solve the above-mentioned problems, a rainwater storage / storage permeation tank according to the present invention includes a face plate member and a side plate member. The face plate member has an opening in the plane and has at least two sets of facing sides,
Two opposite sides of the opposite side set have a concave portion and a convex portion corresponding to each other.

The side plate member has an opening in the surface, and is joined to one surface of the face plate member by concave and convex fitting.

As described above, the rainwater storage / according to the present invention
Since the storage permeation tank is divided into the face plate member and the side plate member, it can be transported in a non-bulky manner.
Therefore, transportation cost is reduced and transportation is facilitated.

In order to construct the rainwater storage / storage infiltration tank according to the present invention, the face plate member and the side plate member are three-dimensionally combined in the left, right, up and down and front and rear directions inside the hole provided in the ground. .

In the combination, first, the face plate member is used as a bottom plate, and this is arranged in a plane on the bottom surface of the hole provided in the ground. The face plate member has concave portions and convex portions corresponding to each other on the two opposite sides of the opposite side set. Therefore, in the adjoining face plate members, by the concave and convex fitting in which the other convex portion is fitted into the one concave portion, it is possible to realize a flattened bottom plate arrangement structure as a whole. In this way, since the face plate members are spread by the uneven fitting,
Assembly work of the bottom plate becomes extremely easy.

Next, on one surface of the face plate member constituting the bottom plate,
The side plate members are joined by concave and convex fitting. Since the connection between the face plate member and the side plate member is also the fitting by concavity and convexity, the assembling work becomes extremely easy.

Among the side plate members, the side plate member existing at the boundary between the adjacent face plate members is shared by the adjacent face plate members. Therefore, it is possible to reduce the number of side plate members used, reduce costs, facilitate assembly, and accelerate assembly.

The face plate member is arranged as a top plate on the side plate member arranged as described above. However, when a minimum unit of rainwater storage / storage permeation tank is obtained, it is a top plate, but when it has a stacking structure of a plurality of layers, it is not a top plate but an intermediate plate.

One surface of the face plate member constituting the top plate is joined to the side plate member by concave and convex fitting. Since the face plate member constituting the top plate is also fitted into the side plate member in a concavo-convex manner, the assembling work thereof becomes extremely easy.

Moreover, in the face plate member constituting the top plate, the two opposite sides have the concave portion and the convex portion corresponding to each other. Therefore, of the adjacent top plates, the convex portion of the face plate member that constitutes the other top plate is fitted into the concave portion of the face plate member that constitutes one top plate, and is integrated as a whole by the concave-convex fitting to be planarized. It is possible to realize the arranged top plate arrangement structure.

As described above, since it is only necessary to lay the top plate on the face plate member by fitting the concavities and convexities, the assembling work becomes extremely easy. The face plate member that constitutes the top plate is
It may be exactly the same as the face plate member that constitutes the bottom plate, or may have the same basic structure and different specific details.

After that, the face plate member constituting the top plate is used as an intermediate plate, the side plate member is fitted thereon, and the face plate member serving as the intermediate plate is further fitted into the side plate member. This provides a rainwater storage / storage permeation tank.

Since the face plate member and the side plate member have an opening in the surface, the inflowing rainwater is temporarily stored, and the stored rainwater is slowly infiltrated into the ground through the opening over time. It is possible to realize a storage penetration tank.
Further, when a water shield layer is provided around the rainwater storage tank, a rainwater storage tank can be obtained.

The plane area and volume of the rainwater storage / storage permeation tank can be arbitrarily changed by selecting the number of plane plates of the face plate member and the number of stacked face plate members and side plate members. Therefore, it is possible to easily follow the difference in plane area and volume.

A permeation protection layer such as a non-woven fabric is provided around the assembly of the rainwater storage / reservoir permeation tank according to known techniques to prevent the inflow of earth and sand into the interior of the assembly.

Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings which are examples. The drawings are merely examples.

[0029]

1 is an exploded perspective view of a rainwater storage / reservoir permeation tank according to the present invention, and FIG. 2 is a rainwater storage / reservoir shown in FIG.
It is a perspective view which shows the assembled state of a storage permeation tank. These figures show the rainwater storage / reservoir seepage tank as the smallest unit.

The illustrated rainwater storage / storage permeation tank includes face plate members 1 and 2 and side plate members 3. These can be formed as a molded product using an appropriate plastic material or a composite material in which a plastic material and an inorganic powder are mixed.

FIG. 3 is a plan view of the face plate member 1. As illustrated, the face plate member 1 has an opening 11 in the plane.
In the illustrated embodiment, the rib 1 is provided on one surface or both surfaces of the face plate member 1.
2 are arranged in a grid pattern, and openings 11 of appropriate size are provided between the ribs 12 as through holes. The number of ribs 12 and the formation position thereof are arbitrary. Further, the size and the number of the openings 11 may be arbitrary.

The face plate member 1 has at least two sets of facing sides. 2 facing each other in each of the facing sides
The sides have a concave portion 13 and a convex portion 24 at positions corresponding to each other. The face plate member 1 shown in the illustrated embodiment has a substantially square shape as a whole, and a concave portion 13 is provided at an approximately middle portion of two adjacent sides, and a convex portion 14 is provided at an intermediate portion of another adjacent two sides. It is provided. The convex portions 14 are provided on both sides of the concave portion 13, and the concave portions 13 are provided on both sides of the convex portion 14.
The concave portion 13 and the convex portion 14 have a shape capable of forming a so-called "Hatoo joint".

Unlike the embodiment, the face plate members 1 and 2 are
Other rectangular shapes, such as a hexagonal shape and an octagonal shape, may be used. The formation positions of the concave portions and the convex portions are selected according to the outer shape of the face plate member 1.

On one surface or both surfaces of the face plate member 1, a pair of projections 15 and 16 is provided along each side.
FIG. 4 is a partial cross-sectional view showing the projections 15 and 16 in an enlarged manner. In the illustrated embodiment, two protrusions 15 and 16 having a height H11 are provided at opposing positions on both sides of the face plate member 1 with a gap G11.

FIG. 5 is a partially enlarged sectional view showing another example of the protrusions 15 and 16. In this embodiment, two protrusions 15,
16 has inward hook portions 151 and 161 at the upper end.

FIG. 6 is a plan view of the face plate member 2. The face plate member 2 has the same basic structure as the face plate member 1, and may be exactly the same as the face plate member 1 shown in FIG.

The face plate member 2 illustrated in FIG. 6 has an opening 2
The size and the number of the ribs 1, the number of ribs 22 and the position where the ribs 22 are formed are different from those of the face plate member 1, and the other basic configurations are the same as those of the face plate member 1. The face plate member 1 is used when forming the uppermost surface of the illustrated face plate member teeth and intermediate plate.

The structure of the face plate member 2 will be described more specifically. Ribs 22 are arranged in a cross shape on one or both sides of the face plate member 2, and an opening 21 of an appropriate size is provided between the ribs 22. It is provided as a through hole.

The face plate member 2 shown in the illustrated embodiment has a generally square shape as a whole, and a concave portion 23 is provided at an approximately middle portion between two adjacent sides and a convex portion is provided at an intermediate portion between the other two adjacent sides. A section 24 is provided. The convex portions 24 are provided on both sides of the concave portion 23, and the concave portions 23 are provided on both sides of the convex portion 24. The concave portion 23 and the convex portion 24 also have a shape that can form a "Hato tail joint".

The face plate member 2 may also have another square shape, for example, a hexagonal shape, an octagonal shape, etc., and the formation positions of the concave portions and the convex portions are selected according to the outer shape of the face plate member 2. The facts are the same as in the case of the face plate member 1.

On one or both sides of the face plate member 2,
A pair of protrusions 25 and 26 is provided along each side. These protrusions 25 and 26 also have the structure shown in FIGS. 4 and 5.

FIG. 7 is a perspective view of the side plate member 3, and FIG. 8 is an enlarged partial sectional view taken along line 8-8 of FIG. Side plate member 3
Has an opening 31 in the plane. As shown in an enlarged view in FIG. 8, the side plate member 3 of the illustrated embodiment has outer frame portions 32 arranged so as to surround the peripheral portion thereof, and extends between the outer frame portions 32 in the vertical direction and in the lateral direction. A partition plate 33 that is continuous in a corrugated shape is arranged in the bottom of the partition plate 33, and a large number of through-hole-shaped openings 31 are provided at the peaks and valleys of the partition plate 33. The side plate member 3 of the illustrated embodiment has an L-shape including two surfaces that are substantially orthogonal to each other. The L-shape can be realized by integral molding, mechanical connection by a plate structure, or the like. Alternatively, it may be flat. Further, the opening 31 may be a slit extending in the vertical direction.

The side plate member 3 is joined to one surface of the face plate member 1 by concave and convex fitting. Specifically, the side plate member 3 has its lower end portion inserted between the two protrusions 15 and 16 provided on the face plate member 1, and is joined to one surface of the face plate member 1 by the concave and convex fitting generated at that time. . When the two protrusions 15 and 16 have the structure shown in FIG. 5, the lower end portion of the side plate member 3 is securely held by the inward hook portions 151 and 161 of the protrusions 15 and 16.

The face plate member 2 is joined to the upper end of the side plate member 3. In connection, the upper end portion of the side plate member 1 is inserted between the two protrusions 25 and 26 provided on the face plate member 2, and the concave and convex fitting generated at that time is connected to one surface of the face plate member 2. When the two protrusions 25 and 26 have the structure shown in FIG. 5, the lower end portion of the side plate member 3 has the protrusion 2
It is securely held by the inward hook portions 251 and 262 of the reference numerals 5 and 16.

As described above, rainwater storage / according to the present invention
Since the storage permeation tank is divided into the face plate members 1 and 2 and the side plate member 3, the face plate members 1 and 2 and the side plate member 3 can be transported in a non-bulky manner, and the transportation cost can be reduced. At the same time, transportation becomes easier. First, the face plate members 1 and 2 are flat plates and can be stacked and transported without being bulky. Further, since the illustrated side plate member 3 is L-shaped, it is possible to avoid bulkiness by stacking the side plate members 3 in the same direction. When the side plate member 3 has a flat plate shape, like the face plate members 1 and 2,
Can be stacked and transported.

To construct the rainwater storage / reservoir permeation tank of the illustrated embodiment, the face plate member 1 is used as a bottom plate, the side plate member 3 is joined thereto by concave and convex fitting, and the face plate member 2 is placed thereon. As the top plate, it suffices to connect them by concave and convex fitting.
Therefore, the assembly work becomes extremely easy.

The face plate members 1 and 2 and the side plate member 3 have openings 1
Since it has 1, 21, and 31, when it is buried in the ground by being covered with a water-permeable protective film, rainwater is opened to the openings 11, 21, and
Through 31, it is possible to obtain a rainwater storage permeation tank that permeates into the ground. Further, when a water shield layer is provided around the rainwater storage tank, a rainwater storage tank can be obtained.

As described above, the above description shows the rainwater storage / storage infiltration tank as the minimum unit. Next, the structure of a rainwater storage / storage permeation tank having a multilayer structure, which is more suitable for actual use, will be described.

FIG. 9 is an exploded perspective view showing a part of the configuration of the rainwater storage / storage / permeation tank according to the present invention, and FIG. 10 is a perspective view showing an assembled state of the rainwater storage / storage / permeation tank shown in FIG. .
In order to configure the illustrated rainwater storage / storage infiltration tank, the face plate members 1 and 2 and the side plate member 3 are provided inside the hole provided in the ground.
Are combined three-dimensionally in the left-right, up-down, and front-back directions.

In the combination, first, rainwater storage /
The face plate member 1 included in each of the storage and permeation tanks is used as a bottom plate, and the face plate member 1 is arranged in a flat shape on the bottom surface of the hole provided in the ground. In the face plate member 1, each of the two sets of facing sides includes two sides facing each other, one side of the two sides has a concave portion 13, and the other side has a convex portion 14 corresponding to the concave portion 13. Therefore, as shown in FIG. 11, in the adjacent face plate members 1 and 1, one concave portion 13 is fitted with the other convex portion 14 and integrated as a whole by concave and convex fitting to form a flat bottom plate arrangement structure. realizable. In this way, since the face plate member 1 serving as the bottom plate is laid over by the concave and convex fitting, the assembling work thereof becomes extremely easy.

The face plate member 1 constituting the bottom plate is
Depending on the plane area required as the storage permeation tank, the required number of sheets are arranged in the front and back and left and right in a plane, and they are connected to each other by concave and convex fitting.

Next, the side plate member 3 is joined to one surface of the face plate member 1 constituting the bottom plate by concave and convex fitting. The concavo-convex fitting is performed by two protrusions 15 provided on one surface of the face plate member 1,
This is performed by inserting the lower end portion of the side plate member 3 between 16 (see FIGS. 4 and 5, etc.). In this way, the face plate member 1 and the side plate member 3 are also joined by the concave and convex fitting, so that the assembling work becomes extremely easy.

The side plate member 3 is arranged in a tubular shape.
In this case, among the side plate members 3, the side plate member 3 existing at the boundary between the adjacent face plate members 1 is shared by the adjacent face plate members 1. Therefore, the number of side plate members 3 used is reduced,
Cost reduction, easy assembly, and quick assembly can be achieved. As the side plate member 3 that does not exist at the boundary between the adjacent face plate members 1, a flat plate-shaped member can be used in addition to the L-shaped member (see FIG. 7).

The face plate member 2 is arranged as an intermediate plate on the side plate member 3 arranged as described above. One surface of the face plate member 2 forming the intermediate plate is joined to the side plate member 3 by concave and convex fitting. The concavo-convex fitting is performed by inserting the upper end portion of the side plate member 3 between the two protrusions 25 and 26 provided on one surface of the face plate member 2 (see FIGS. 4 and 5, etc.). Therefore, the assembling work of the face plate member 2 to the side plate member 3 becomes extremely easy.

Moreover, the face plate member 2 constituting the intermediate plate is
One of the two sides facing each other has a concave portion 23, and the other side has a convex portion 24 corresponding to the concave portion 23 (see FIG. 6). Therefore, as shown in FIG. 12, among the adjacent intermediate plates, the convex portion 24 of the other face plate member 2 is fitted into the concave portion 23 of the one face plate member 2 and integrated as a whole by the concave and convex fitting to be planarized. It is possible to realize the arranged structure of the intermediate plate. As described above, since the intermediate plate only has to be spread by the concave and convex fitting of the face plate member 2, the assembling work thereof becomes extremely easy.

After that, the side plate member 3 is fitted on the face plate member 2 which constitutes the intermediate plate, and the face plate member 2 which becomes the intermediate plate is further fitted.
The assembling work of fitting the above into the side plate member 3 is repeated a necessary number of times. This provides a rainwater storage / storage permeation tank with the required volume.

The plane area and volume of the rainwater storage / storage permeation tank can be arbitrarily changed by selecting the number of face plate members 1 and 2 to be laid on a plane and the number of stacking face plate members and side plate members. Therefore, it is possible to easily realize a rainwater storage / storage permeation tank having a plane area and a volume required in a practical situation.

FIG. 13 is a diagram for explaining the arrangement of the side plate members. In the illustrated embodiment, (n × n) L-shaped side plate members are
An example in which the arrangement is n rows and n columns is shown. As shown,
When the number of rows and the number of columns are the same, the group G1 of side plate members belonging to the lower half and the group G2 of side plate members belonging to the upper half are arranged to be opposed to each other with the arrangement diagonal line D1 as a boundary line. .

FIG. 14 is a view for explaining another arrangement of the side plate member. In the illustrated embodiment, the side plate members are arranged in n rows and m columns (m
<N) is shown. As shown, the number of rows n
If the number of rows m is different, planar side plate members 3m1 and 3m2 may be used in addition to the L-shaped side plate member. Number of rows n
And, as the difference in the number of rows m increases, the number of flat side plate members increases.

As described above, in the case of using the L-shaped side plate member, even if the plane area and the volume change, it is sufficient to arrange them regularly, so that the arrangement and assembly can be performed quickly. be able to.

FIG. 15 is a view showing a state in which the rainwater storage and infiltration tank according to the present invention is buried in the ground. Rainwater storage infiltration tank F
Is placed inside the hole 5 formed in the ground 4, and the upper surface side is a layer 7 of soil, gravel, concrete, asphalt, or the like.
Is covered by. The perimeter of the rainwater storage / infiltration tank F is covered with a water-permeable protective layer 6 such as a non-woven fabric according to a known technique to prevent the inflow of earth and sand into the rainwater storage / infiltration tank F.

Since the face plate members 1 and 2 and the side plate member 3 have openings 11, 21, and 31 in the plane, respectively,
Rainwater that has flowed in from the inflow pipe 8 is temporarily stored, and the opening 1
It can be penetrated into the ground through 1, 21, 31.

The rainwater storage / storage infiltration tank F has a structure in which flat side plate members 1 and 2 and a side plate member 3 having a partition plate 33 are laminated, and a load applied from the ground side by the partition plate 33 of the side plate member 3 is applied. Since the waveform is received in the direction parallel to the plate surface (longitudinal direction), it is possible to secure sufficiently large mechanical strength against the load applied from the ground side. The earth pressure applied from the lateral direction can be sufficiently countered by forming the corrugated partition plate 33.

FIG. 16 is a view showing a state in which the rainwater storage tank according to the present invention is buried in the ground. Rainwater storage tank F is 4 underground
It is arranged inside the hole 5 formed in, and the upper surface side is covered with a layer 7 of soil, gravel, concrete or asphalt. The bottom surface and the entire side surface of the rainwater storage tank F are covered with the water shield layer 6. Therefore, the rainwater that has flowed in from the inflow pipe 8 is stored inside the rainwater storage tank F.

[0065]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a rainwater storage / storage infiltration tank that can be transported in a non-bulky manner and is effective in reducing transportation costs. (B) It is possible to provide a rainwater storage / reservoir permeation tank that can easily and quickly perform assembly work. (C) It is possible to provide a rainwater storage / storage permeation tank in which the required number of constituent members is reduced, cost is reduced, assembly is facilitated, and assembly is accelerated. (D) It is possible to provide a rainwater storage / storage infiltration tank that can freely change the width, depth, and length, and can easily follow the difference in plane area and volume.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a rainwater storage / storage permeation tank according to the present invention.

FIG. 2 is a perspective view showing an assembled state of the rainwater storage / storage permeation tank shown in FIG.

FIG. 3 shows a rainwater storage / storage infiltration tank according to the present invention.
It is a top view of a face plate member used as a bottom plate.

FIG. 4 is a partial cross-sectional view showing an enlarged portion of a protrusion of the face plate member shown in FIG.

FIG. 5 is a partially enlarged cross-sectional view showing another example of the protrusions provided on the face plate member used in the rainwater storage / storage permeation tank according to the present invention.

FIG. 6 shows a rainwater storage / storage infiltration tank according to the present invention,
FIG. 6 is a plan view of a face plate member used as a top plate or an intermediate plate.

FIG. 7 is a perspective view of a side plate member included in the rainwater storage / storage permeation tank according to the present invention.

FIG. 8 is an enlarged partial sectional view taken along line 8-8 of FIG.

FIG. 9 is an exploded perspective view showing a part of the configuration of the rainwater storage / storage permeation tank according to the present invention.

10 is a perspective view showing an assembled state of the rainwater storage / storage permeation tank shown in FIG.

FIG. 11 is a view for explaining the arrangement and connection of face plate members that form the bottom plate.

FIG. 12 is a view for explaining the arrangement and connection of face plate members that constitute a top plate or an intermediate plate.

FIG. 13 is a diagram illustrating the arrangement of side plate members.

FIG. 14 is a diagram illustrating another arrangement of side plate members.

FIG. 15 is a view showing a state in which the rainwater storage and infiltration tank according to the present invention is buried in the ground.

FIG. 16 is a view showing a state in which the rainwater storage tank according to the present invention is buried in the ground.

[Explanation of symbols]

1, 2 face plate member 3 side plate members

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[Procedure amendment]

[Submission date] August 23, 2001 (2001.8.2)
3)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater storage / storage infiltration tank. The rainwater storage / storage infiltration tank according to the present invention is
Including a rainwater storage tank to keep storing rainwater, rainwater and temporarily storing <br/> and both the rainwater storage impregnation vessel to discharge by slowly penetrate pooled rainwater into the ground.

[Procedure amendment]

[Submission date] July 15, 2002 (2002.7.1)
5)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (6)

[Claims] 1. A rainwater storage / reservoir permeation tank including a face plate member and a side plate member, wherein the face plate member has an opening in the surface and at least two sets of facing sides. Two opposite sides of the opposite side set have a concave portion and a convex portion corresponding to each other, the side plate member has an opening in the surface, and is joined to one surface of the face plate member by concave and convex fitting. Rainwater storage / storage infiltration tank. 2. The rainwater storage / storage infiltration tank according to claim 1, wherein a plurality of the face plate members and the side plate members are provided, and the plurality of face plate members are provided on one of two adjacent face plate members. The provided convex portion is arranged in a planar shape by fitting the concave portion provided on the other side with the concave portion, and a side plate member existing at a boundary between two adjacent face plate members among the plurality of side plate members is , A rainwater storage / storage infiltration tank shared by two adjacent face plate members. 3. The rainwater storage / retention infiltration tank according to claim 1, further comprising a bottom plate, wherein the bottom plate is constituted by the face plate member. 4. The rainwater storage / reservoir permeation tank according to claim 1, further comprising a top plate or an intermediate plate, wherein the top plate or the intermediate plate is constituted by the face plate member. Storage / storage permeation tank. 5. A face plate member for rainwater storage / reservoir permeation tank, which has an opening in the plane and has at least two sets of facing sides, and the two facing sides of the facing side sets are opposite to each other. A face plate member for a rainwater storage / storage permeation tank having corresponding recesses and protrusions. 6. A rainwater storage / storage / permeation tank side plate member having an opening in a plane.