JP2000073418A - Filling member for underground water storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filling member for an underground water storage tank capable of folding a cylindrical body to make it compact in the case of conveyance and storing, making a filling member as a cylindrical shape at one touch operation in a construction site and connecting a plurality of cylindrical bodies to each other in both vertical and horizontal directions to arrange them in a block state. SOLUTION: A filling member 1 is equipped with a cylindrical body 12 capable of connecting four panels 10 with hinges 11 to fold, at the same time, arranging the panels 10 in the vertical direction and joint plates 14 arranged to the upper end face 13 of the cylindrical body at least on the highest stage when a plurality of cylindrical bodies are arranged in a block state and connecting the cylindrical bodies to each other in the horizontal direction. The cylindrical bodies arranged in the horizontal direction and adjacent to each other are connected with a horizontal joint device 15, and the cylindrical bodies stacked in the vertical direction and adjacent to each other are connected with a vertical joint device 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground water storage space filled with a large number of tubular bodies to store rainwater, to temporarily store rainwater and slowly penetrate the ground, The present invention relates to a filling member for forming an underground water tank to be discharged into a tank.

[0002]

2. Description of the Related Art It is known to form an underground water tank with a filling member in which a number of stacking members and the like are arranged in a horizontal direction in a water storage space underground and vertically stacked. The underground water storage tank is buried underground in a city park, a plaza, a sidewalk, or the like, and is mainly used for storing rainwater. If rainwater is once stored in an underground water storage tank at the time of heavy rain or the like, the amount of water flowing into the river at a time decreases, so that a rapid rise in the water level of the river can be suppressed. The rainwater stored in the underground water storage tank can be used for irrigation of parks and green spaces, watering of grounds, firefighting water, emergency living water, and the like.

[0003] Compared with concrete tanks and ponds, underground water storage tanks formed by filling members are simple to construct, have a short construction period, are inexpensive, and are particularly excellent in earthquake resistance. Furthermore, since the upper part of the underground water tank is backfilled with soil, it can be effectively used as it is as a park.
As a filling member for an underground water storage tank, a technique of stacking boxes has already been proposed.

[0004]

However, in this conventional filling member, since the side walls of the stacked boxes are inclined, the boxes are buckled by a downward load applied to the upper part of the underground water storage tank. Cheap. As a result, there is a fear that the box body is gradually deformed to cause land subsidence.

Accordingly, the present applicant has disclosed in Japanese Patent Application Laid-Open No. H10-776.
No. 66 proposes a stacking member for an underground water storage tank as a related technique of the present invention. The stacking member is formed into a polygonal cylindrical body by facing and butting a pair of divided bodies. According to this related technology, it is possible to assemble the stacked members into a polygonal cylindrical body at the construction site of the underground water storage tank, and to improve the convenience of transportation and storage in a bulky shape, but further improvement of technology is required. Had been.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and can be compacted by folding a tubular body during transportation and storage. It is an object of the present invention to provide a filling member for an underground water storage tank in which shapes can be connected in both horizontal and vertical directions and arranged in a block shape.

[0007]

In order to achieve the above-mentioned object, a filling member for an underground water storage tank according to the present invention comprises a plurality of cylindrical bodies which are blocked in both horizontal and vertical directions in an underground water storage space. A filling member for forming an underground water tank by arranging and filling in a shape, wherein at least four panels are joined at a hinge portion so as to be foldable and the panels are arranged in a vertical direction When the cylindrical body and the plurality of cylindrical bodies are arranged in a block shape, the plurality of cylindrical bodies are arranged at least on an upper end surface of the uppermost cylindrical body and connect the plurality of cylindrical bodies in a horizontal direction. With a connecting plate,
The tubular bodies that are adjacent to each other in the horizontal direction are connected by horizontal connecting means, and the tubular bodies that are vertically stacked and vertically adjacent to each other are connected by the vertical connecting means.

[0008] When the plurality of panels in the folded state are spread through the hinges, the abutting portions formed on the adjacent panels come into contact with each other to form a predetermined tubular shape. Eggplant is preferred.

In a preferred embodiment, the horizontal connecting means and the vertical connecting means comprise a connecting plate and connecting engagement portions formed on the upper end face and the lower end face of the tubular body, respectively. And the upper surface side engaged portion for connection formed on the upper surface side of the connection plate and the engagement portion on the lower end surface side of the tubular body are engaged with each other, and the lower surface of the connection plate The plurality of cylindrical bodies are connected to each other through the connecting plate by engaging the lower surface side engaged part for connection formed on the side with the engaging part on the upper end surface side of the cylindrical body. Are connected in the horizontal direction, and the cylindrical bodies that are vertically stacked and vertically adjacent to each other are connected in the vertical direction via the connection plate.

In another preferred embodiment, the horizontal connecting means includes a horizontal connecting member formed on a projecting piece protruding outward in the horizontal direction from at least one of an upper end and a lower end of the cylindrical body. , And the horizontal connection coupling portion of one of the tubular bodies and the horizontal connection cover of the other tubular body are arranged side by side in the horizontal direction. By engaging the engaging portion,
The plurality of cylindrical bodies are directly connected to each other in the horizontal direction, and the vertical connecting means includes an engaging portion for vertical connection formed on the upper end surface and a lower end surface of the cylindrical body, and an engaged portion. The vertical connecting member formed on the upper end surface of the lower cylindrical body among the cylindrical bodies vertically stacked and vertically stacked, and
The upper and lower adjacent tubular bodies are directly connected in the vertical direction by engaging with the vertical connection engaging portions formed on the lower end surface of the upper tubular body.

In these cases, it is preferable that the outer surface side of the panel is substantially flat with little unevenness.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The filling member according to the present invention is used for filling an underground water storage space with a large number of cylindrical bodies to form an underground water storage tank. In this underground water storage tank, rainwater can be stored, rainwater can be temporarily stored and slowly penetrated into the ground, or can be discharged to a river or the like. If the underground water tank is used only for storing rainwater, it is enclosed with a sheet for blocking etc. to make it a closed structure, but if it is used to infiltrate rainwater into the ground or discharge it to rivers, etc. For example, a blocking sheet is provided only on the side wall of the underground water storage tank, and the ceiling and the bottom have an unsealed structure through which rainwater can pass. In this unsealed underground water storage tank, one overflow pipe for overflow may be provided, and rainwater flowing out of this overflow pipe may be permeated into the ground. The rainwater flowing out of the outflow pipe may permeate into the ground, and the rainwater flowing out of the other outflow pipe may be discharged to a river. In the following embodiment, an example of an underground water storage tank having a closed structure is shown.

An embodiment of a filling member for an underground water storage tank according to the present invention will be described below with reference to FIGS. FIG. 1 is a schematic longitudinal sectional view showing a state in the middle of construction work for filling a filling member, and FIG. 2 is a schematic longitudinal sectional view of an underground water storage tank in which construction work is completed.

As shown in FIG. 1 and FIG.
Is for forming the underground water storage tank 4. The underground water storage tank 4 has a plurality of cylindrical bodies 12 of the filling member 1 arranged in blocks in both horizontal and vertical directions in a water storage space 3 formed in the ground by digging the ground 2. It is formed by filling. The periphery of the filling member 1 is covered with a blocking sheet 5 having no water permeability. As a material of the shielding sheet 5, rubber having excellent aging resistance, oxidation resistance, and water resistance such as ethylene-propylene-rubber (EPDM) is preferable, but synthetic resin such as polyethylene and polyvinyl chloride is also used. Good. The blocking sheet 5 is formed in a predetermined shape in advance so as to cover the entire periphery of the block-shaped filling member 1.

The bottom surface 6 of the water storage space 3 is a smooth surface without unevenness by laying sand on crushed stone and laying a synthetic resin plate 7 or the like on the sand layer. These crushed stones and sand also exhibit a function as a water permeable material and a function as a buffer material. The filling member 1 is loaded on the bottom surface 6 via the blocking sheet 5. The filling member 1 is an assembly formed by arranging a large number of tubular bodies 12 (including 12a, 12b, 12c) and the like horizontally and stacking them vertically.
The filling member 1 has a skeletal structure made of synthetic resin.
The inside of each of the cylindrical bodies 12 itself is a space for a water reservoir, and the spaces of these cylindrical bodies 12 communicate with each other to form a large space inside the filling member 1 as a whole.

In the upper part of the underground water storage tank 4, an inspection port 8 communicating with the gap in the filling member 1 is attached. On the side of the underground water storage tank 4, supply and drainage of rainwater and the like are performed. Supply port 9a and discharge port 9b. The supply port 9a and the discharge port 9b may be provided on the upper surface side or the lower surface side of the underground water storage tank 4. Using this underground water storage tank 4, for example, rainwater collected on the roof of a building can be introduced into the gap of the filling member 1 from the supply port 9a to store water, and can be drained from the discharge port 9b.

Next, the filling member 1 will be described in detail. (First Embodiment) FIGS. 3 to 8 show a first embodiment of a filling member. FIG. 3 is a perspective view of a panel, FIG. 4 is a perspective view of a tubular body, and FIG. 5 is a tubular body. It is a perspective view which shows the state which folded. FIG. 6A is a plan view of a standard connecting plate,
FIG. 6B is a sectional view taken along line BB of FIG. 6A, and FIG.
FIG. 6D is a plan view of a connecting plate for a peripheral portion, and FIG. 6D is a plan view of another connecting plate for a peripheral portion. FIG. 7 is a perspective view showing an installation method when the filling member is installed, and FIG. 8 is a plan view showing a state where the filling member is installed.

As shown in FIG. 3 to FIG.
Has a plurality of cylindrical bodies 12 and connecting plates 14, 14a, 14b. The tubular body 12 has at least four panels 10 joined by hinges 11 so as to be foldable, and the panels 10 are arranged vertically. When the plurality of tubular bodies 12 are arranged in a block shape, the connecting plates 14, 14a, and 14b are arranged at least on the upper end surface 13 of the uppermost tubular body 12, and are connected to each other. Are connected in the horizontal direction.

The cylindrical bodies 12 that are adjacent to each other in the horizontal direction are connected by a horizontal connecting means 15, and the cylindrical bodies 12 which are vertically stacked and vertically adjacent are connected by a vertical connecting means 16. . As shown in FIG.
When a plurality of (four in the present embodiment) panels 10 in a folded state are spread through hinge portions 11, as shown in FIG.
The members 7 and 17 come into contact with each other to form a cylindrical shape having a predetermined shape (in this embodiment, a square when viewed from above and below).

The horizontal connecting means 15 and the vertical connecting means 16 include connecting plates 14, 14a, 14b and
2 are formed on the upper end surface 13 and the lower end surface 18, respectively. Connecting plate 1
Upper surface side engaged portions 20 for connection are formed on the upper surface side of 4, 14a, 14b, and lower surface side engaged portions 21 for connection are formed on the lower surface side. The connecting means 15 and 16 engage the upper-side engaged portion 20 of the connecting plates 14, 14 a and 14 b with the engaging portion 19 on the lower end surface 18 side of the tubular body 12, and connect the connecting plates 14, 14 a and 14 b. The engaged portion 21 on the lower surface side of 14b is engaged with the engaging portion 19 on the upper end surface 13 side of the tubular body 12.

In the present embodiment, the connecting plates 14, 14a, 1
The projections 20 and 21 formed on 4b are engaged parts,
Although the through hole 19 that engages with the protrusions 20 and 21 is an engaging portion of the tubular body 12, a through hole is formed as an engaged portion in the connecting plate, and the through hole 19 is formed in the tubular body 12. A projection may be formed as an engagement portion that engages with the through hole. In the present embodiment, the connecting plates 14, 14 a, 14 b and the through holes 19 of the tubular body 12 are formed by the horizontal connecting means 15 and the vertical connecting means 16.
It has both functions.

Panel 10, connecting plates 14, 14a, 14b
Is integrally formed by injection molding or the like using a hard synthetic resin such as polypropylene, polyethylene, acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl chloride, and fiber reinforced plastic (FRP) as a material. Among these materials, polypropylene and the like are preferable in that they can be formed into a low-foamed body because the thickness of the formed body can be increased, and the rigidity can be increased.

One cylindrical body 12 is formed by four panels 10.
Each panel 10 has a substantially rectangular shape as a whole and has a shape with many irregularities. Four panels 10
Have the same shape, and the adjacent panels 10 are alternately turned upside down, and are joined to each other by hinges 11 to form a tubular body 12. By joining in this way, the cylindrical body 12 can be constituted by a combination of one type of panel 10, so that only one type of die for manufacturing the panel 10 is required, and the manufacturing process is simple and the manufacturing is simple. Cost can be reduced.

In the panel 10, the abutting portions 17 are formed so as to protrude outwardly from the side portions of the upper end face 13 and the lower end face 18, respectively. A plurality of cylindrical pin supports 22 are integrally attached to both sides of the panel 10.
Is mounted with a pin 23. Since the tip portion 24 of the pin 23 has a cracked structure and has a hook shape, if the pin 23 is mounted on the pin support portion 22, the tip portion 24 spreads and is locked by the pin support portion 22. 23 does not fall off. If the adjacent panels 10 are joined in the upside down direction, a plurality of (three in this case) pin support portions 22
Are successively engaged with one pin 23. The hinge 11 is constituted by the pin support 22 and the pin 23.

By forming a plurality of windows 35 in the panel 10, the weight of the tubular body 12 is reduced, and the windows 35 also serve as communication paths for water. Since the peripheral frame 26 and the ribs 27 are integrally formed on the outer surface 25 and the inner surface 34 of the panel 10, the panel 10 is lightweight and has high rigidity. Connecting plates 14, 14 are provided on the upper end surface 13 and the lower end surface 18.
The slits 30 and 31 respectively engaging with the outer frame 28 and the inner frame 29 of a and 14b are integrally formed. The width of the central slit 30 is large because the central slit 30 is engaged with the overlapping portion of the outer frames 28 of the two connecting plates 14, 14a, 14b. The two slits 31 located on both sides of the slit 30 are engaged with the inner frames 29 of the connecting plates 14, 14a, 14b, so that their widths are small.

As shown in FIG. 4, when the four panels 10 are open, the contact portion 17 of one panel 10 and the contact portion 17 of the other panel 10 joined to one panel 10 make contact. In contact therewith, the whole of the four panels 10 has a square tubular shape when viewed from above and below. When the cylindrical body 12 is transported and stored, the cylindrical body 12 can be folded as shown in FIG. 5 by crushing the cylindrical body 12 from both sides. In this case, if the adjacent contact portions 17, 17 are separated from each other and the opposing panels 10 are pressed so as to approach each other, the tubular body 12 is folded into a plate shape. If you do this,
Since the cylindrical body 12 is not bulky, it is convenient for transportation and storage.

As shown in FIGS. 6A and 6B, the standard connecting plate 14 has a substantially octagonal ring shape, and
Inside 9 is a space 32. Inner frame 29 and outer frame 2
8 is a flat plate portion 33, and two flat protrusions 20 are formed on the flat plate portion 33 in four orthogonal directions. On the lower surface at the same position as the protrusion 20 on the upper surface, a lower surface-side protrusion 21 is formed so as to project downward. The connecting plate 14a (FIG. 6 (C)) and the connecting plate 14b (FIG. 6 (D)) are each a standard connecting plate 1
4 has a half and a quarter shape. FIG.
As shown in (1), the connecting plate 14 is mounted inside the filling member 1, and the connecting plates 14a and 14b are appropriately disposed around the filling member 1. The plurality of tubular bodies 12 are connected in the horizontal direction via the connecting plates 14, 14a, and 14b, and the vertically adjacent tubular bodies 12 stacked vertically are connected in the vertical direction. Therefore, the cylindrical bodies 12 are positioned with high precision so as to maintain a square when viewed from the vertical direction, and the cylindrical bodies 12 are firmly connected to each other to be integrated and reinforced in strength.

The procedure of the construction work for the underground water storage tank 4 is as follows.
First, as shown in FIG. 1, the ground 2 is dug down to form a water storage space 3, and then a plate material 7 is spread over the flat bottom surface 6.
To form Next, the blocking sheet 5 is laid on the bottom surface 6, and a large number of connecting plates 14 are laid thereon. The connection plates 14a and 14b are arranged in the peripheral part as needed. The tubular body 12 is pushed down from above the connecting plates 14, 14a, 14b arranged in this manner and mounted.

A folded cylindrical body 1 as shown in FIG.
2, the tubular body 12 is spread in a square tubular shape as viewed from above and below as shown in FIG.
4, 14a, and 14b are attached so as to be connected to each other.
In this case, of the pair of through holes 19, 19 arranged in the lower end surface 18 of each panel 10 of the tubular body 12, the projection 20 of one connecting plate 14 is engaged with one through hole 19, and the other The projection 20 of the other connecting plate 14 is engaged with the hole 19.
Further, the slit 31 of the lower end face 18 is connected to the inner frame 2 of the connecting plate 14.
9 and the slit 30 is attached to the two overlapping outer frames 2.
8 Thus, one connecting plate 14 connects the four cylindrical bodies 12 to each other.

On the upper end surface 13 of the cylindrical body 12, a connecting plate 14,
14a and 14b are provided. That is, the connecting plates 14, 1
One lower surface side protrusion 21 arranged on the lower surface side of 4a, 14b
Is mounted on the through-hole 19 of the upper end surface 13 of one cylindrical body 12, and the other lower surface side projection 21 is mounted on the through-hole 19 of the other cylindrical body 12. Further, two overlapping outer frames 28 are mounted on the slits 30 on the upper end surface 13, and the inner frame 29 is mounted on the slits 31. Thereby, one connecting plate 14 is engaged with the upper end surface 13 side of the tubular body 12 to connect the four tubular bodies 12.

The connecting plates 14, 14a and 14b have a function of connecting and positioning the tubular bodies 12 in the horizontal direction, and a function of connecting and positioning the upper and lower tubular bodies 12 in the horizontal direction. The connecting plates 14, 14a, 14b provided on the upper end surface 13 of the tubular body 12 also function as a lid, and the connecting plates 14, 14a, 14b serve as the lid.
Since the upper opening is closed and has a substantially flat state without large holes or protrusions, the worker can walk on the connecting plates 14, 14a, 14b during the work of installing the filling member 1.

In the following procedure, a large number of cylindrical bodies 12 are
By arranging the blocks 1 in both the horizontal and vertical directions while connecting them with the connecting plates 14, 14a, 14b, the filling member 1 having a large porosity as a whole is formed. After the entire filling member 1 has a rectangular shape, the filling member 1
Is covered with a shielding sheet 5 to make the inside a closed space. The connecting plate 1 is also provided on the upper end surface 13 of the uppermost tubular body 12.
Since the lids 4 and 14a and 14b are provided, the blocking sheet 5 is supported by the connecting plate and is covered well in a substantially flat state. When the earth and sand are backfilled as shown in FIG. 2 after the inspection port 8 is attached, the filling member 1 is filled in the water storage space 3 and the underground water storage tank 4 is completed.

In the present invention, for example, since one connecting plate 14 is connected to the four cylindrical bodies 12 at the upper part and the lower part, respectively,
The upper and lower portions are connected to four connecting plates 14 respectively, and are sandwiched between the upper and lower connecting plates 14. Projection 2 of connecting plates 14, 14a, 14b
If 0 and 21 are engaged with the through-holes 19 of the tubular body, the plurality of tubular bodies 12 are inevitably formed in a square, and are arranged with high accuracy at regular predetermined pitches in the vertical and horizontal directions and the vertical direction. Positioned. Thereby, a large number of cylindrical bodies 12
Is fixed firmly while maintaining the square shape,
Will constitute a tough skeletal structure with little wobble. Since the entire filling member 1 is integrated, the downward load applied to the upper portion of the filling member 1 can be dispersed, and large rigidity and earthquake resistance are exhibited.

(Second Embodiment) FIGS. 9 to 13 show a second embodiment. FIG. 9 is a plan view of a tubular body 12a, and FIG. 10 is a front view showing a method of applying the tubular body 12a. Fig. 11 is a plan view showing a state where the filling member 1 is installed, Fig. 12 is a front view of Fig. 11, and Fig. 13 is a modification of the second embodiment, using connecting plates 14, 14a and 14b. FIG. 12 is a diagram corresponding to FIG. In the following embodiments, the same or corresponding parts as those of the other embodiments are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.

As shown in FIGS. 9 to 12, in the present embodiment, the horizontal connecting means 15 and the vertical connecting means 16
As a result, the cylindrical members 12a are directly connected to each other in both the horizontal and vertical directions. The cylindrical body 12a is configured such that the four panels 10a are joined at the hinges 11 so as to be foldable, and the panels 10a are arranged vertically. When the plurality of cylindrical bodies 12a are arranged in a block shape, the connecting plates 40, 40a, 40b are arranged on the upper end surface 13a of the uppermost cylindrical body 12a, and are connected to the plurality of cylindrical bodies 12a.
a are connected in the horizontal direction.

The cylindrical bodies 12a adjacent to each other in the horizontal direction are directly connected by the horizontal connecting means 15, and the cylindrical bodies 12a vertically stacked and vertically adjacent to each other are vertically connected through the vertical connecting means 16. Directly linked in direction. The horizontal connecting means 15 includes an engaging portion 43 for horizontal connection formed on the protruding piece 45 and an engaged portion 44 for horizontal connection formed on the protruding piece 46. The protruding pieces 45 and 46 respectively protrude outward in the horizontal direction from at least one of the upper end 41 and the lower end 42 (the lower end 42 in the present embodiment) of the tubular body 12a.

In this embodiment, two adjacent panels 1
A plurality of (three per panel) connection projections 43 as engagement portions are formed on the protruding piece 45 of Oa. In addition, a plurality of connection holes 44 as engagement portions (three per one panel 10a) are formed in the protruding pieces 46 of the other two adjacent panels 10a which are arranged opposite to the two panels 10a. Has formed. The connecting projection 43 of one of the cylindrical bodies 12a adjacent to each other in the horizontal direction is connected to the other cylindrical body 1a.
The plurality of cylindrical bodies 12a are directly connected to each other in the horizontal direction by engaging with the connection holes 44 of 2a.

The vertical connecting means 16 comprises an engaging portion 48 and an engaged portion 49 for vertical connection formed on the upper end surface 13a and the lower end surface 47 of the cylindrical body 12a, respectively. In the present embodiment, the engaging portion 48 of the upper end surface 13a is a protruding portion 48 protruding upward, and the engaged portion 49 of the lower end surface 47 is a connecting hole 49 with which the protruding portion 48 can engage.
Is shown. The lower cylindrical body 12a of the vertically adjacent cylindrical bodies 12a stacked vertically is
By engaging the protrusion 48 formed on the upper end surface 13a of the upper cylindrical member 12 with the connection hole 49 formed on the lower end surface 47 of the upper cylindrical body 12a, the vertically adjacent cylindrical bodies 12a can be vertically connected to each other. Directly connected.

The standard connecting plate 40 has a square shape, and the connecting plates 40a and 40b for the peripheral portion have a rectangular shape which is a half and a quarter of the connecting plate 40, respectively. Connecting plates 40, 40a,
Since 40b has a plate shape with no space in the center,
It is convenient for an operator to walk on the upper part of the connection plate, and the upper surface of the connection plate can be covered with the blocking sheet 5 well. The connection plates 40, 40 a, and 40 b have connection holes 5 as engagement portions for vertical connection that can be engaged with the protrusions 48.
0 is formed. Slits 30 and 31 are formed on the upper end surface 13a of the tubular body 12a so as to be engageable with an outer frame 51 and an inner rib 52 formed to project downward from the connecting plates 40, 40a and 40b. . Note that, instead of the connecting plates 40, 40a, and 40b, the connecting plates 14, 14a, and 14b of the first embodiment are disposed on the upper end surface 13a of the uppermost tubular body 12a, and a plurality of tubular bodies 12a are provided. They may be connected in the horizontal direction (see FIG. 13).

(Third Embodiment) FIGS. 14 to 16 show a third embodiment. FIG. 14 is a plan view of a tubular body 12b, and FIG. 15 shows a state where the tubular body 12b is folded. FIG. 16 is a plan view showing a state where the tubular body 12b is folded into another shape. As shown in FIG. 14, the tubular body 12 b joins two panels 60 and four panels 61 with a hinge 62 so as to be foldable,
Panels 60 and 61 are arranged vertically.

Since the hinge portion 62 can be bent and extended by a hinge effect by forming a thin portion of polypropylene or the like, the structure of the hinge portion is simple. When the tubular body 12b is folded, the hinge portion 62 can be bent to have the shape shown in FIG. 15 or FIG. Panels 60 and 61 in a folded state
Is expanded, the hinge portion 62 is deformed, and the contact portions 63, 6 formed on the adjacent predetermined panels 60, 61, respectively.
Since the four members are in contact with each other, the cylindrical body 12b has a predetermined shape, for example, a square cylindrical shape when viewed from above and below.

(Fourth Embodiment) FIGS. 17 to 19 show a fourth embodiment. FIG. 17 is a perspective view of a panel 10c, FIG. 18 is a perspective view of a tubular body 12c, and FIG. It is a top view showing the state where state body 12c was folded. FIG.
As shown in FIG. 18, the outer surface 25c side of the panel 10c constituting the cylindrical body 12c has a substantially flat shape with little unevenness. Other configurations are substantially the same as those of the tubular body 12 of the first embodiment.

The tubular body 12c is filled in a square tubular shape as viewed from the vertical direction as shown in FIG. 18, and the tubular body 12c can be folded as shown in FIG. it can. Since the outer surface 25c side of the panel 10c is substantially flat, in the case of the filling member 1 in which the tubular body 12c is formed in a block shape, the entire outer peripheral surface of the filling member 1 becomes substantially flat with almost no irregularities. Therefore, even if the recessed portion on the outer peripheral surface of the filling member 1 is not filled with a molded article of expanded polystyrene resin or the like, the blocking sheet 5 can cover the flat outer peripheral surface of the filling member 1 well without being torn. Can be. In addition, the panel 10 in the second and third embodiments.
Also in a, 60 and 61, if the outer surface side is formed in a substantially flat shape with little unevenness, the same operation and effect as in the fourth embodiment can be obtained. Further, the second to fourth embodiments also have the same operation and effect as the first embodiment.

As described above, in the present invention, the tubular body is foldable, so that it can be folded and compact during transportation or storage, and is easy to handle. In addition, since the cylindrical body can be expanded into a predetermined shape by a simple operation of one touch from the folded state, the work of installation work of arranging a large number of cylindrical bodies in a block shape is easy, Work time is short. Since the tubular panels arranged in blocks in the horizontal and vertical directions are arranged in the vertical direction, the filling member has sufficient buckling strength to withstand a load from above. Therefore,
Even if the underground water storage tank is installed underground in a park, a plaza, a sidewalk, or the like in a city, the cylindrical body can be used for a long time without buckling deformation, and there is no danger of land subsidence.

By the horizontal connecting means and the vertical connecting means, the cylindrical bodies can be connected three-dimensionally in both the horizontal and vertical directions and positioned with high precision.
In particular, since the upper and lower tubular members are connected to each other by the vertical connecting means, there is no possibility that the tubular members may be shifted laterally. One or two types of panels are combined to form a cylindrical body, and since the panels are also thin, the injection molding die can be small and the manufacturing cost is low. In addition, the case where the cylindrical body has four panels or six panels as shown in FIGS. 14 to 16 and forms a square when viewed from above and below is shown, but a pentagon or more composed of five or more panels Polygon, or a cylinder, an ellipse, or the like. In the drawings, the same reference numerals indicate the same or corresponding parts.

[0046]

Since the present invention is constructed as described above, the cylindrical body can be folded down during transportation and storage so that it can be compacted. , Can be arranged in a block shape by being connected in both vertical directions.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional view showing a state in the middle of construction work for filling a filling member of the present invention.

FIG. 2 is a schematic longitudinal sectional view of an underground water storage tank in which construction work has been completed.

FIG. 3 to FIG. 8 are diagrams showing a first embodiment,
FIG. 3 is a perspective view of the panel.

FIG. 4 is a perspective view of a tubular body.

FIG. 5 is a perspective view showing a state where a tubular body is folded.

6A is a plan view of a connecting plate, FIG. 6A is a plan view of a standard connecting plate, FIG. 6B is a sectional view taken along line BB of FIG. 6A, and FIG. 6) is a plan view of a connecting plate for a peripheral portion, and FIG.
(D) is a plan view of another connecting plate for the peripheral portion.

FIG. 7 is a perspective view showing an installation method when installing a filling member.

FIG. 8 is a plan view showing a state where a filling member is installed.

9 to 13 are views showing a second embodiment, and FIG. 9 is a plan view of a cylindrical body.

FIG. 10 is a front view showing a method of constructing a tubular body.

FIG. 11 is a plan view showing a state where a filling member is installed.

FIG. 12 is a front view of FIG. 11;

FIG. 13 is a plan view showing a modification of the second embodiment.

14 to 16 are views showing a third embodiment, and FIG. 14 is a plan view of a cylindrical body.

FIG. 15 is a plan view showing a state where the tubular body is folded.

FIG. 16 is a plan view showing a state where the tubular body is folded into another shape.

17 to 19 show a fourth embodiment, and FIG. 17 is a perspective view of a panel.

FIG. 18 is a perspective view of a tubular body.

FIG. 19 is a plan view showing a state where the tubular body is folded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filling member 3 Water storage space 4 Underground water tank 10, 10a, 10c, 60, 61 Panel 11, 62 Hinge part 12, 12a, 12b, 12c Tubular body 13, 13a Upper end surface of a tubular body 14, 14a, 14b Connection plate 15 Horizontal connection means 16 Vertical connection means 17, 63, 64 Abutment part 18, 47 Lower end face of tubular body 19 Through hole (engagement part for connection) 20 Top surface side protrusion (top surface for connection) 21) Lower surface side protrusion (lower surface side engaged portion for connection) 25, 25c Outer surface 40, 40a, 40b Connecting plate 41 Upper end of tubular body 42 Lower end of tubular body 43 For connection Projection (engagement part for horizontal connection) 44 Connection hole (engaged part for horizontal connection) 45, 46 Projection piece 47 Lower end surface of tubular body 48 Projection part (engagement part for vertical connection) 49 Connection Hole (engaged part for vertical connection) 50 Connection Hole (Vertical Connection Engaged Part)

Claims (5)

[Claims] 1. A filling member for forming an underground water storage tank by arranging and filling a plurality of cylindrical bodies in a block shape in both horizontal and vertical directions into a water storage space under the ground. The four panels are joined together at a hinge part to enable folding, and the tubular body in which the panels are arranged in a vertical direction, and at least the uppermost stage when a plurality of these tubular bodies are arranged in a block shape. A connecting plate disposed on an upper end surface of the cylindrical body and connecting the plurality of cylindrical bodies in a horizontal direction, wherein the adjacent cylindrical bodies arranged in a horizontal direction are connected by horizontal connecting means. A filling member for an underground water storage tank, wherein the cylindrical bodies vertically stacked and connected vertically above and below are connected by a vertical connecting means. 2. When the plurality of panels in a folded state are spread through the hinge portions, the cylindrical body is brought into contact with abutting portions formed on adjacent panels so that a predetermined cylinder is formed. The filling member for an underground water storage tank according to claim 1, wherein the filling member has a shape. 3. The horizontal connecting means and the vertical connecting means are constituted by the connecting plate, and connecting engaging portions formed on the upper end face and the lower end face of the tubular body, respectively. The upper surface side engaged portion for connection formed on the upper surface side of the connection plate is engaged with the engagement portion on the lower end surface side of the tubular body, and is formed on the lower surface side of the connection plate. The plurality of cylindrical bodies are connected to each other in the horizontal direction via the connecting plate by engaging the lower surface side engaged portion for connection and the engaging portion on the upper end surface side of the cylindrical body. The filling member for an underground water storage tank according to claim 1 or 2, wherein the tubular bodies that are vertically stacked and vertically adjacent to each other are connected in the vertical direction via the connecting plate. 4. The horizontal connecting means is formed on a projecting piece protruding outward in the horizontal direction from at least one of an upper end and a lower end of the cylindrical body. And the engaged portion, the horizontal connecting engaging portion of one of the tubular bodies adjacent to each other in the horizontal direction and the horizontal connecting engaged portion of the other tubular body By engaging, the plurality of cylindrical bodies are directly connected to each other in the horizontal direction, and the vertical connecting means is provided with vertical connecting members formed on the upper end surface and the lower end surface of the cylindrical body, respectively. The vertical direction connecting engagement portion formed by the joining portion and the engaged portion, and formed on the upper end surface of the lower cylindrical body of the cylindrical bodies vertically stacked and vertically adjacent to each other, The lower end surface of the upper cylindrical body The filling for underground water storage tanks according to claim 1 or 2, wherein the vertically adjacent tubular bodies are directly connected in the vertical direction by engaging the engaged parts for direct connection. Element. 5. The panel according to claim 1, wherein an outer surface side of the panel has a substantially flat shape with little unevenness.
The filling member for an underground water storage tank according to any one of the above items.