JP2012112225A - Assembly rainwater storage tank - Google Patents

Abstract

[PROBLEMS] To store and collect rainwater collected through rain gutters, etc., and to use it for gardening and planter plant cultivation and watering such as sprinkling water. It is easy to assemble, disassemble, relatively inexpensive, easy to maintain, and an assembled rainwater reservoir.
A cylindrical body formed from a plurality of strip-shaped side wooden boards and a polygonal bottom plate, which are connected in advance, is bound with an outer band, a waterproof bag is placed in the cylindrical body, and an inner band is inserted for waterproofing. The opening of the bag is formed, the inner diameter of the cylindrical body is maintained, and piping for introducing and discharging rainwater is performed on a piping joint provided in the waterproof bag. Such an assembly member of the rainwater storage tank is folded and overlapped to reduce the bulk so that it is stocked and transported and assembled into a finished product at the time of installation.
[Selection] Figure 2

Description

  The present invention collects rainwater collected through rain gutters, etc., and is used for small-scale rainwater use in houses, etc., for the purpose of effectively using for gardening or planter plant cultivation or sprinkling water It relates to a rainwater storage tank.

  An increasing number of households collect rainwater collected through rain gutters and use it effectively for plant cultivation in gardens and planters and for sprinkling water. Conventionally, for these purposes, containers having a capacity of about 100 to 300 liters are provided as rainwater storage tanks.

  In the rainwater storage tanks for the above-mentioned uses, plastic ones are the mainstream. In addition, there are metal, barrels and wooden ones.

Utility model literature

Utility model document 1

Utility model registration No. 3137040

Utility model document 2

Utility model registration No. 3147989

  The plastic and metal rainwater reservoirs described above are installed behind the house like trash cans and compost, and few are familiar with the landscape of the garden and the cityscape. On the other hand, some wooden rainwater storage tanks such as barrels are beautiful, but they are heavy and bulky, requiring a lot of labor for transportation and installation, and requiring specialized techniques for assembly. Remains.

  Therefore, the object of the present invention is a wooden that fits into the landscape of the garden and the streets, easy to stock and transport, easy to assemble and disassemble, relatively inexpensive, easy to maintain, etc. The goal is to provide an assembled rainwater reservoir that meets the requirements.

In order to achieve the above object, the invention according to claim 1 has a bottom plate formed in a polygonal shape, an inner groove into which the bottom plate is fitted, and an inner groove into which the bottom plate is fitted into the inner groove. A plurality of strip-shaped side wooden boards that form the body part, an outer band that is fitted in a groove provided on the outer side of the strip-shaped side board, and binds the outer periphery of the cylindrical body part, and is stored in the cylindrical body part to store rainwater A waterproof bag, an inner band that is provided at an opening edge of the waterproof bag, forms an opening of the waterproof bag, and holds an inner diameter of the cylindrical body, and is inserted into the inner wall surface of the cylindrical body, and the waterproof bag. It is equipped with a water distribution pipe with an on-off valve that guides the rainwater collected together with the pipe joint provided,
The outer band is composed of an auxiliary band that is inserted into the concave groove and connects a plurality of strip-shaped side wooden boards in advance, and a main band having a fastening tool and having a diameter larger than the groove width of the concave groove,
After inserting the auxiliary band into the concave groove and connecting a plurality of strip-shaped side wooden boards, the cylindrical body part is formed by fitting the polygonal sides of the bottom plate into the inner groove, and the main groove is further inserted into the concave groove into which the auxiliary band is fitted. The band is fitted and tightened with a tightening tool, the outer peripheral surface of the cylindrical body is bound in a state where the upper edge of the side wall of the groove is pressed, and the waterproof bag is attached to the cylindrical body with the inner band.

  According to a second aspect of the present invention, the assembly-type rainwater storage tank according to the first aspect is provided with a leg portion that is self-supporting by fitting an upper frame and a lower frame in a cross shape, and a tube is formed on the unevenness provided on the upper portion of the leg portion. The bottom part of the cylindrical body part can be fitted and set.

  The effects obtained from the first aspect are the following five points. That is, the first point is that the material of the exterior of the rainwater storage tank is wood, so that it will become familiar with the landscape of the garden and the cityscape. Secondly, the rainwater storage tank is divided into strip-shaped side wooden boards, bottom plates, outer bands, inner bands, waterproof bags, water distribution pipes with on-off valves, etc. connected to a rosary, and each member is spread and folded flat. It is possible to ship in a state where the bulk is remarkably reduced by superimposing them, and to be assembled into a finished product at the time of installation, so that inventory and transportation are facilitated. Thirdly, the assembly of parts such as the strip-shaped side wooden board, bottom plate, outer band, inner band, waterproof bag, water pipe with on-off valve, etc. connected to the rosary that constitutes the rainwater storage tank, It can be easily performed without using a tool, and can be easily moved without being damaged even when disassembled. Fourth, the rainwater storage tank is only waterproofed by placing a waterproof bag in the cylindrical body, so there is no need to carry out precise wood processing or caulking processing, and it is also possible to use cedar and birch thinning. It is possible to provide a relatively inexpensive wooden rainwater reservoir. The fifth point is that when oil pollution due to exhaust gas in urban areas is significant, the waterproof bag can be taken out and washed or replaced, and the filtration device can be retrofitted, so that maintenance is easy.

  The effects obtained from the second aspect are the following two points. That is, the first point is that the leg part is self-supporting by simply fitting the upper frame and the lower frame into a cross shape, and by simply fitting the bottom part of the cylindrical body part into the unevenness provided on the upper part of the leg part, It is easy to assemble. Secondly, since the legs become flat when divided into an upper frame and a lower frame, even if they are bundled with a rainwater reservoir, they can still be stocked and transported easily.

The external appearance perspective view of the rain water storage tank which shows embodiment of this invention. The perspective view which decomposed | disassembled the rainwater water tank shown in FIG. 1 into the assembly member. The perspective view showing the state which made the rain water storage tank shown in FIG. 1 the assembly member, and reduced the volume. The longitudinal cross-sectional view of the rainwater storage tank shown in FIG. The longitudinal cross-section partial enlarged view showing the relationship between the ditch | groove of the rectangular wooden board shown in FIG. 4, and an outer side band. The cross-sectional partial enlarged view showing the change of the relationship between the strip-shaped side wooden board and main band shown in FIG. The longitudinal cross-sectional view showing another effect | action of the rainwater storage tank shown in FIG. The longitudinal cross-sectional view showing the state which attached the filtration apparatus to the rainwater storage tank shown in FIG. The cross-sectional view showing the example of the opening restriction | limiting of a lid | cover by the safety measure of the rainwater storage tank shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In FIG. 1, the external appearance of a rainwater reservoir is shown. The outer periphery of the wooden hexagonal columnar cylindrical body 5 is fastened at two places at the top and bottom with a 16-sided outer frame (main band of the outer band) 6 made of stainless steel wire, and provided with a faucet (distribution pipe with on-off valve) 12. , Connected to a rain water collecting device 19 via a hose 18, sealed with a hexagonal wooden board lid 16 fitted into the opening, and placed on a cross-shaped leg 14 made of stainless steel wire. It is fixed with a part fixing screw 15. The xylem is, for example, a thinning material of cedar or straw and a preservative pressure injection material.

  In FIG. 2, the strip-shaped side wooden board 3, bottom board 4, outer frame (outer band main band) 6, inner frame (inner band) 8, waterproof bag 10, leg portions in which the rainwater storage tank shown in FIG. 14 and the like. Hereinafter, individual assembly members will be described.

  The strip-shaped side wooden board 3 connected in a rosary shape is configured by fitting two strings (auxiliary bands of the outer band) 2 in the upper and lower two rows of concave grooves 1b provided on the outer side of the rectangular side wooden board 1, respectively. Sixteen strip-shaped side wooden boards 1 are connected in advance. The width of the concave groove 1b is such that the string (auxiliary band of the outer band) 2 fits, and after the adhesive is put into the bottom of the concave groove 1b, the string (auxiliary band of the outer band) 2 is fitted to the bottom. The string (auxiliary band of the outer band) 2 is, for example, a tetron rope. Thus, the strip-shaped side wooden board 3 connected in a rosary manner can be flattened, bent into a bellows shape, and self-supported, or can be folded by combining the outer surface and the outer surface. A row of inner grooves 1c into which the bottom plate is fitted are provided in the lower part of the inner side surface of the 16 strip-shaped side surface wooden boards 1. A through hole 1d for passing the pipe joint 11 is formed in one of the sixteen strip-shaped side wooden boards 1 that contacts the front surface of the cylindrical body 5 and downward, and one that contacts the rear surface. There is a groove 1e on the inner surface of the through hole 1d. Further, projections 9 for receiving an inner frame (inner band) 8 are formed on the upper part of the four inner side surfaces corresponding to the right front, right back, left front, and left back of the cylindrical body part 5 among the 16 strip-shaped side wooden boards 1. A pilot hole 1f for screwing is formed, and a screw pilot hole 1g for fixing the leg portion 14 is formed in the lower portion of the outer surface.

  The bottom plate 4 has a hexagonal shape and has a thickness that fits into the inner groove 1c at the lower inner side surface of the strip-shaped side wooden board 1. The outer diameter is a cylindrical body considering the contraction of the strip-shaped side wooden board 1 in the grain direction. The inner dimension of the portion 5 is set smaller than the dimension obtained by adding the depth of the inner groove 1c.

  There are two outer frames (main bands of the outer band) 6. It is made of a stainless steel wire, has a shape in which the center of one side of the hexagon is open, and both ends of the open wire are bent into the shape of a scissors, and two concentric rings 6b are respectively provided. A nut (clamp) 6c is welded to one ring 6b and tightened through a bolt (clamp) 7 from the other ring 6b so that the diameter of the outer frame (main band of the outer band) 6 can be adjusted. . The reference inner diameter of the outer frame (main band of the outer band) 6 is set smaller than the outer diameter of the cylindrical body 5, and the outer frame (main band of the outer band) 6 with loosened bolts (clamping tools) 7. Can be elastically spread over and covered with the cylindrical body portion 5, and can be overlapped and locked in the concave groove 1b in which the string (auxiliary band of the outer band) 2 is fitted. The adjustment range of the diameter of the outer frame (main band of the outer band) 6 is sufficiently provided in consideration of contraction in the direction of the grain of the strip-shaped side wooden board 1.

  One inner frame (inner band) 8 is a closed hexagon made of stainless steel wire. The outer diameter dimension of the inner frame (inner band) 8 is set to be smaller than the inner diameter dimension of the cylindrical body portion 5 in consideration of shrinkage in the direction of the grain of the strip-shaped side wooden board 1.

  The waterproof bag 10 is made of a soft resin and has a cylindrical shape with a circular bottom. Piping joint holes 10b are formed at two locations on the lower side of the waterproof bag 10 on the front side and on the upper side of the back side, and the piping joint 11 with the convex portion 11b for preventing rotation is attached. In addition, small holes 10c are formed at equal intervals on the side of the waterproof bag 10 in the vicinity of the right front, right back, left front, and left back so as to hook onto the protrusions 9 screwed into the strip-shaped side wooden board 1.

  The leg portion 14 includes an upper frame 14d in which two small frames 14b having the same shape formed by bending stainless steel wire are welded at the upper portion, and a lower frame 14e in which the two small frames 14b are welded at the lower portion. Since both the upper frame 14d and the lower frame 14e are welded to the two small frames 14b via an intermediate material, the upper frame 14d has a slit 14f with a lower end opened, and the lower frame 14e has a slit 14f with an upper end opened. There is. The slits 14 f of the upper frame 14 d and the lower frame 14 e are fitted together to assemble the cross-shaped leg portion 14. Since the four small frames 14b have convex portions 14c obtained by extending one end of the stainless steel wire, the four convex portions 14c stick to each other when assembled to the cross-shaped leg portions 14, and the upper frame 14d and the lower frame 14e Can be kept at a right angle. The unevenness 14g on the upper part of the leg part 14 is shaped to fit with the raised bottom of the cylindrical body part 5, and as a safety measure, it is fastened to the cylindrical body part 5 with a leg fixing screw 15 via a screw attachment part 14h. Can do.

  The lid 16 is a hexagonal wooden board, and the outer diameter dimension is set smaller than the inner diameter dimension of the cylindrical body portion 5 in consideration of the shrinkage in the direction of the grain of the strip-shaped side wooden board 1. A through hole is opened in the center of the lid, a string as a handle 16b is passed through, and a square member of wood is attached to the back of the lid as an anti-warping material 16c.

  In FIG. 3, a strip-shaped side wooden board 3, bottom board 4, outer frame (main band of the outer band) 6, inner frame (inner band) 8, waterproof bag 10, leg portions in which the rainwater storage tank shown in FIG. 14 shows a state in which it is disassembled into assembly members such as 14 and placed with reduced bulk. The strip-shaped side wooden board 3 connected with a rosary is spread flatly, and the outer surface and the outer surface are folded into four to prevent scratches, and the leg portion 14 is divided into an upper frame 14d and a lower frame 14e. Further, two outer frames (main band of the outer band) 6, inner frame (inner band) 8, lid 16, and bottom plate 4 are placed on top of each other, and various parts are put in the gap, and the waterproof bag 10 It is combined with. In the state of FIG. 3, the volume can be reduced to one-third or less compared with the state of FIG. 1.

  In FIG. 4, the longitudinal cross-section of the rainwater reservoir shown in FIG. 1 is shown. Hereinafter, the method of assembling the rainwater reservoir from the disassembled assembly members shown in FIGS. 2 and 3 and the operation of the rainwater reservoir shown in FIG. 1 will be described.

  First, a method of assembling a hexagonal columnar cylindrical body portion 5 from a strip-shaped side wooden plate 3 and a bottom plate 4 connected in a rosary manner and tightening it with an outer frame (main band of an outer band) 6 will be described. The strip-shaped side wooden board 3 connected in a rosary shape is folded in a bellows shape to be self-supporting, and the rectangular side wooden board 3 connected in a rosary shape is wound around the bottom board 4 while inserting the polygonal sides of the bottom board 4 in the inner groove 1c at the lower inner side. Thus, a 16-prism cylindrical body 5 is formed. Thereafter, the two outer frames (main bands of the outer band) 6 loosened with the bolts (clamping tools) 7 are elastically spread and covered with the cylindrical body part 5, and the string (auxiliary band of the outer band) 2 is fitted. The upper and lower two rows of concave grooves 1b are fitted, and bolts (clamping tools) 7 are tightened and temporarily assembled.

  Next, a method of putting the waterproof bag 10 in the cylindrical body part 5 and attaching it with the inner frame (inner band) 8 will be described. First, the protrusions 9 including the spacers 9b and the tapping screws 9c are screwed into the four protrusion pilot holes 1f at the upper part of the inner side surface of the cylindrical body part 5. The piping joint 11 attached to the waterproof bag 10 and the through-hole 1d for the pipe joint on the rectangular side board are aligned so that the waterproof bag 10 is placed inside the cylindrical body 5 and 4 near the opening of the waterproof bag 10 is placed. The small projection holes 10c are hooked on the projections 9 respectively. An inner frame (inner band) 8 is placed inside the waterproof bag 10 and placed horizontally on the protrusion 9 to form the opening of the waterproof bag 10 and to hold the inner diameter of the cylindrical body 5.

  Thereafter, the bolts (clamps) 7 of the two outer frames (main bands of the outer band) 6 are tightened, and the outer peripheral surface of the cylindrical body part 5 is bound in a state where the upper edge of the side wall of the groove 1b is pressed. .

  Third, a method for attaching the pipe joint 11 to the cylindrical body portion 5 will be described. Using a non-square board, the waterproof bag 10 is leveled along the inside of the cylindrical body 5 and the two pipe joints 11 are inserted into the pipe joint through-holes 1d on the strip-shaped side wooden board and lightly pressed. The rotation stopper convex portion 11b is fitted into the groove 1e of the through hole 1d, and the faucet (water pipe with on-off valve) 12 and the hose nipple 13 are respectively attached from the outside of the cylindrical body portion 5.

  Fourth, a method for attaching the leg portion 14 to the cylindrical body portion 5 will be described. The upper frame 14d and the lower frame 14e of the leg portion are erected in a cross shape by fitting the slits 14f. Align the positions of the screw mounting portion 14h of the leg and the pilot hole 1g for the leg fixing screw of the strip-shaped side board, and fit the cylindrical body 5 on the leg 14 to fit the four leg fixing screws 15 Secure with.

  Finally, the lid 16 is fitted into the opening of the cylindrical body 5 and is left at the installation location, and the rain water collecting device 19 and the hose nipple 13 are connected by the hose 18.

  In addition, the following two measures are prepared as a fall prevention measure.

  One is a method of attaching a wire 21 to an upper outer frame bolt (clamp) 7 and connecting it to a pillar or the like. The other is a method in which the anchor 14 and the bent metal 23 are used to sandwich the wire of the leg 14 and fix it to the ground.

  The operation of the rainwater storage tank shown in FIG. 4 is as follows.

  The rainwater diverted by the rainwater collecting device 19 through the vertical gutter 20 is collected through the hose 18 and led out from the faucet (distribution pipe with on-off valve) 12 for use. When the rainwater collecting device 19 has an overflow function, it is not necessary to provide an overflow pipe in the rainwater storage tank. When the rainwater collecting device 19 is not provided with an overflow function, the third pipe joint 11 is provided, the overflow pipe 24 is piped, and rainwater overflowing to the seepage trough 25 or the like can be led out.

  5, the relationship between the concave groove 1b on the outer side of the strip-shaped side board shown in FIG. 4, the string (auxiliary band of the outer band) 2, and the outer frame (main band of the outer band) 6 is shown in an enlarged manner. The width of the groove 1b is substantially equal to the thickness of the string (auxiliary band of the outer band) 2, and the depth of the groove 1b is deeper than the thickness of the string (auxiliary band of the outer band) 2. Therefore, an outer frame (main band of the outer band) 6 having an inner diameter smaller than the outer diameter of the cylindrical body 5 is overlapped with the concave groove 1b into which the string (auxiliary band of the outer band) 2 is fitted. It can be locked. Further, when the outer frame (main band of the outer band) 6 is tightened with the outer frame bolt (clamping tool) 7 and the cylindrical body part 5 is fastened, the outer frame (main band of the outer band) 6 becomes the side wall of the groove 1b. The dimension at which the outer frame (main band of the outer band) 6 is fitted into the groove 1b is A when the upper edge is pressed.

  6, the change of the relationship between the strip-shaped side wooden board 1 and the outer frame (main band of the outer band) 6 shown in FIG. 4 is shown in an enlarged manner. If the strip-shaped side wooden board 1 is natural wood, it is further shrunk by solar radiation or the like even if it is a dry material. FIG. 6A shows a state before the strip-shaped side wooden board 1 is contracted, and FIG. 6A shows a state where the outer frame bolt (clamp) 7 is further tightened when the strip-shaped side wooden board 1 contracts by 2%. As shown in FIG. 5, since the outer frame (main band of the outer band) 6 is fitted in the groove 1b with the dimension A before shrinking, the outer frame (main band of the outer band) 6 is tightened. Even if it is deformed by this and the positional relationship parallel to the strip-shaped side wooden board 1 is not maintained, the appearance is not impaired. In addition, regarding the gap generated between the adjacent strip-shaped side wooden boards 1, there is no functional problem because the waterproof bag 10 is provided in the cylindrical body part 5, and the wobbling of the cylindrical body part 5 due to the gap is also internal. The water pressure is eliminated by accumulating water.

  FIG. 7 shows another function of the rainwater storage tank shown in FIG. The pipe joint 11 can be provided not only on the outer peripheral surface of the cylindrical body part 5 but also on the bottom part, and various usage methods can be provided. The pipe joint 11 attached to the bottom surface of the waterproof bag 10 is passed through the pipe joint through hole 4b of the bottom plate 4, and the hose nipple 13 and the hose 18 are connected. For example, if one of the two water distribution pipes is connected to a remote storm water collector and the other is connected to an automatic irrigation device (distribution pipe with open / close valve) 27, the rain water storage tank is separated from the downpipe. It can be installed anywhere, and watering the plants can be done automatically. In addition, the amount of stored water can be increased by connecting hoses 18 of two or more rainwater storage tanks. Furthermore, it is also possible to connect the pipe 26 to the inside of the waterproof bag 10 of the pipe joint 11 for leading rainwater so that the settled garbage is not drained.

  In FIG. 8, the state which attached the filtration apparatus 28 to the rain water reservoir shown in FIG. 1 is represented. A filtration device 28 is placed inside the waterproof bag 10 in the cylindrical body 5 and connected to the pipe joint 11 for introducing rainwater. For example, gravel or a filter for precipitating garbage is contained in the filtering device 28, and the filtering device 28 can be retrofitted according to the degree of rainwater contamination by the installation environment.

  In FIG. 9, the example which performed the opening restriction | limiting of the lid | cover 16 with the safety measure of the rainwater storage tank shown in FIG. 1 is represented. Instead of the tapping screws 9c with the spacers 9b, the heatons 31 with the spacers 9b are screwed into the four projecting pilot holes 1f in the upper part of the inner side surface of the cylindrical body part 5, and the center of the anti-curling material 16c for the lid A through-hole 16d is formed in and a resin pipe 17 is fitted therein. The string 32 is passed through the four heatons 31 and the resin pipe 17 so as to be hooked, and the cord stoppers 33 are attached to both ends of the string 32. The lifting height of the lid 16 can be changed by adjusting the length of the string 32. By providing the opening restriction as described above, it is possible to prevent the infant from falling onto the cylindrical body 5.

1. Strip-shaped side board 1b. Groove 1c. On the outer side of the strip-shaped side board. The inner groove 1d. Through hole for pipe joint of strip-shaped side board 1e. Grooves for through holes for pipe joints in strip-shaped side wooden boards 1f. Pilot holes for protrusions on a strip-shaped side wooden board 1g. 1. Pilot hole for fixing screws to the leg of the rectangular wooden board String (auxiliary band for outer band)
3. 3. Strip-shaped side wooden board connected with a rosary. Bottom plate 4b. 4. Through hole for piping joint on the bottom plate 5. cylindrical body part Outer frame (main band of outer band)
6b. Outer ring 6c. Outer frame weld nut (clamp)
7). Outer frame bolt (clamp)
8). Inner frame (inner band)
9. Protrusion 9b. Spacer 9c. Tapping screw 10. Waterproof bag 10b. Hole for piping joint of waterproof bag 10c. 10. Small hole for protrusion of waterproof bag Piping joint 11b. 11. Anti-rotation convex part of the pipe joint Faucet (distribution pipe with open / close valve)
13. Hose nipple 14. Leg 14b. Leg frame 14c. The convex part 14d of the small frame of the leg part. Leg upper frame 14e. Leg lower frame 14f. Leg slit 14g. Unevenness of leg 14h. 15. Screw mounting portion of the leg Leg fixing screw 16. Lid 16b. Lid handle 16c. Lid warping prevention material 16d. Through hole for lid warping prevention material 17. Resin pipe 18. Hose 19. Rainwater collector 20. Downspout 21. Wire 22. Anchor bolt 23. Folded hardware 24. Overflow tube 25. Osmosis cup 26. Tube 27. Automatic irrigation system (distribution pipe with open / close valve)
28. Filtration device 29. Gravel 30. Filter 31. Heaton 32. String 33. Cord stopper

Claims (2)

A bottom plate formed in a polygonal shape, an inner groove into which the bottom plate is fitted, and a plurality of strip-shaped side wooden plates that form a cylindrical body portion by fitting the bottom plate into the inner groove, the side of the strip An outer band that is fitted into a groove provided on the outer surface of the wooden board and binds the outer periphery of the cylindrical body part, a waterproof bag that is stored in the cylindrical body part and stores rainwater, and a waterproof bag provided at the opening edge of the waterproof bag An opening / closing valve for leading rainwater collected together with an inner band to be inserted into the inner wall surface of the cylindrical body part and a pipe joint provided in the waterproof bag to maintain the inner diameter of the cylindrical body part It has an attached water pipe,
The outer band is composed of an auxiliary band that is inserted into the concave groove and connects a plurality of strip-shaped side wooden boards in advance, and a main band having a fastening tool and having a diameter larger than the groove width of the concave groove,
After inserting the auxiliary band into the concave groove and connecting a plurality of strip-shaped side wooden boards, the cylindrical body part is formed by fitting the polygonal sides of the bottom plate into the inner groove, and the main groove is further inserted into the concave groove into which the auxiliary band is fitted. The band is fitted and tightened with a tightening tool, the outer peripheral surface of the cylindrical body is fastened while pressing the upper edge of the side wall of the concave groove, and the waterproof bag is attached in the cylindrical body with the inner band. Assembled rainwater reservoir.   The assembly type according to claim 1, further comprising: a leg portion that is self-supporting by fitting the upper frame and the lower frame into a cross shape, wherein the bottom portion of the cylindrical body portion can be fitted into the unevenness provided on the upper portion of the leg portion. Rainwater reservoir.

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