JP2004049137A - Water retention board for greening - Google Patents

Abstract

An object of the present invention is to provide a watering board for greening capable of efficiently diffusing and draining surplus water and guiding air into soil.
A water retention board for greening having a plurality of water retention recesses formed on a surface thereof, wherein a water passage ventilation groove extending in a substantially horizontal direction is formed on an upper surface of a partition wall between the plurality of water retention recesses. This facilitated diffusion and drainage of surplus water and secured a space for guiding air into the soil.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a watering board for greening, which is laid on the roof of a building or on a veranda of a general house, and on which soil for growing plants is deposited.
[0002]
[Prior art]
In recent years, as part of environmental measures such as the mitigation of the heat island phenomenon in urban areas and the reduction of CO2, the movement to greening by cultivating flowers, grass, trees, etc., by depositing lightweight soil on the rooftops of buildings and verandas, etc., has been active. Has become.
BACKGROUND ART Conventionally, as a mat laid to deposit lightweight soil on a rooftop of a building, a veranda, or the like, there is, for example, a water retention mat for rooftop greening disclosed in Japanese Patent Application Laid-Open No. 2000-14246.
This mat has a plurality of water retention recesses formed on an upper surface of a mat made of a synthetic resin, and a flat portion formed on an upper surface of a partition wall between the plurality of water retention recesses. It holds, and the excess water overflowing from the water holding recess is transmitted to the flat portion to diffuse and drain.
[0003]
However, according to the above prior art, a water retention sheet made of a nonwoven fabric or the like is laid on the upper surface of the mat, and when soil is deposited on the water retention sheet, the water retention sheet is strongly applied to the surface of the flat portion projecting upward. Because of the contact, there is no space on the surface of the flat portion, and there is a concern that diffusion and drainage of surplus water overflowing from the water holding recess cannot be performed smoothly.
Further, in order to promote plant cultivation, in addition to the above-mentioned diffusion and drainage of excess water, supply of air into the soil is indispensable. In the above-mentioned conventional technology, a device for guiding air into the soil is required. Was not done.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide a water retention board for greening that can efficiently diffuse and drain excess water and guide air into soil. Is to do.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a first invention is a watering board for greening having a plurality of water holding recesses formed on a surface thereof, and a water passage extending in a substantially horizontal direction on an upper surface of a partition wall between the plurality of water holding recesses. A ventilation groove is formed.
[0006]
Further, the second invention is characterized in that a drainage vent hole penetrating to the back side is formed on the bottom surface of the water-permeable vent groove.
Further, the third invention is characterized in that a communication groove between the water holding recesses which connects these water holding recesses is formed between the upper portions of the adjacent water holding recesses.
Furthermore, the fourth invention is such that a plurality of the water retention boards for greening are joined to each other, so that a fitting portion is formed on one of the opposed side surfaces, and the other side surface is provided with the fitting portion. It is characterized in that a fitted portion that fits in an uneven shape is formed.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of a watering board A for greening which is an embodiment of the present invention will be described with reference to the drawings.
The water retention board A for greening is a foamed molded body made of a synthetic resin such as a polystyrene resin, a polyethylene resin, a polypropylene resin, an ethylene-vinyl acetate resin, a vinyl chloride resin, and a urethane resin. , The water-permeable ventilation grooves 21 and 22 extending in the XY directions, the drainage ventilation holes 30 arranged on the bottom surface of the water-permeable ventilation grooves, and the communication grooves 41 between the water-retention concave parts in the XY direction communicating the adjacent water-retention concave parts 10. , 42 and the like, a drainage groove 50 is formed on the back surface, and a fitting portion 71 and a fitted portion 72 are formed on the side surface.
[0008]
The water retention concave portion 10 is a bottomed hole having a rectangular shape in a plan view, and has a storage portion 11 narrowed in an inverted trapezoidal vertical cross section on the bottom side.
The width (dimension in the X direction in FIG. 1) of the water retaining recess 10 is not particularly limited, but it is easy to insert pearlite, fired soil, pumice or other porous granular soil into the water retaining recess 10. From the viewpoint of 10 mm or more, and it is preferable to be 70 mm or less so that the inserted porous granular soil is easy to walk at the time of work, and is not crushed and cracked, and is a particularly preferable example of the present embodiment. According to this, it is set in the range of 25 to 50 mm.
[0009]
A plurality of the water retention recesses 10 are arranged in the X direction and the Y direction (see FIG. 1) of the greening water retention board via the partition walls a1, a2, and a3.
[0010]
The partition wall a1 partitions between the water retaining recesses 10 arranged in the Y direction, and a water flow ventilation groove 21 in the X direction is formed on the upper surface thereof.
The partition walls a2 and a3 partition between the water retaining recesses 10, 10 arranged in the X direction. One partition wall a2 is wider than the other partition wall a3, and is disposed for each of the two water retaining recesses 10, 10. On the upper surface of the partition wall a2, a water-flow ventilation groove 22 in the Y direction is provided. It is formed.
[0011]
Each of the water flow ventilation grooves 21 and 22 in the X direction and the Y direction is a groove having a vertical cross-sectional concave shape, and extends in a substantially horizontal direction.
Drainage ventilation holes 30 are formed at predetermined intervals on the bottom surface of the X-direction water-permeable ventilation groove 21 so as to include the intersection of the water-permeable ventilation groove 21 and the Y-direction water-permeable ventilation groove 22. I have.
[0012]
In addition, according to an example of the present embodiment, by providing the water flow ventilation grooves 21 and 22 on the upper surfaces of the partition walls a1 and a2, the water flow ventilation grooves 21 and 22 are arranged in a square lattice. The two water holding recesses 10 are arranged in each lattice formed by the water passage and ventilation grooves 21 and 22, but the water passage and ventilation grooves are further formed on the upper surface of the partition wall a3 to further increase the water passage. The air permeability may be improved.
[0013]
The drainage vent 30 penetrates from the bottom surface of the water passage ventilation groove 21 in the X direction to the upper surface of the drainage ventilation groove 50 on the back side of the water retention board A for greening. , 22 and drainage from the water flow ventilation grooves 21, 22 to the drainage ventilation groove 50.
[0014]
The communication grooves 41, 42 between the water retention recesses in the X direction and the Y direction are formed between the upper portions 12, 12 of the adjacent water retention recesses 10, 10, so as to communicate the water retention recesses 10, 10. The communication groove 41 between the water retention recesses in the X direction divides the water flow ventilation groove 22 and the partition walls a2 and a3 in the Y direction. And the partition wall a1.
Then, the communication grooves 41 and 42 between the water retention recesses disperse the excess water overflowing from the storage portion 11 which is the lower part of the water retention recess 10 to other water retention recesses 10 adjacent in the XY directions.
[0015]
The drainage ventilation groove 50 is disposed on the back side of the water retention board A for greening at least in a cross shape with the drainage ventilation hole 30 so as to secure air introduced into the drainage ventilation hole 30 or to allow water to flow therethrough. It becomes a passage for draining water flowing into the drainage vent hole 30 from the ventilation grooves 21 and 22.
According to a preferred example of the present embodiment, the drainage ventilation groove 50 is formed on the back surface of the watering board for greening so as to correspond to the water transmission ventilation groove 21 in the X direction and the water transmission ventilation groove 22 in the Y direction, respectively. The lower end opening of the drainage hole 30 is disposed on the upper surface in the groove 50.
[0016]
In addition, a fitting portion 71 is formed on one of the opposed side surfaces so that a plurality of the greening water retention boards are joined to each other on the outer peripheral side surface of the greening water retention board A, and the other side surface is formed. Is formed with a fitted portion 72 that fits into the fitting portion 71 in an uneven manner (see FIGS. 2A and 2B).
[0017]
The fitting portion 71 has a shape in which the upper half of the side surface of the water retention board A for greening protrudes outward, and the lower half of the same side surface is recessed inward. According to this, it is formed on one of both sides in the X direction and one on both sides in the Y direction.
[0018]
The fitted portion 72 indents the upper half of the side surface of the watering board A for greening inward so as to fit into the fitting portion 71 in an uneven manner, and the lower half of the same side faces outward. And is formed on the other of the two side surfaces in the X direction and the other of the two side surfaces in the Y direction, respectively.
[0019]
The shapes of the fitting portion 71 and the fitted portion 72 are not limited to those in the present embodiment. For example, the fitting portion may be formed in a convex shape in vertical section, and may be fitted in the fitting portion. It may be formed in a concave shape with a matching vertical section.
[0020]
Next, an example in which plants are cultivated on the rooftop of a building using the water retention board A for greening having the above configuration will be described in detail with reference to FIG.
First, a waterproof layer 62 and an insulating sheet 63 are laid in order on a base concrete 61 on the roof of a building, and a water retention board A for greening is laid on the insulating sheet 63. Normally, as the waterproof layer laid on the foundation concrete 61 on the roof of the building, the asphalt waterproof layer made of asphalt, the coated waterproof layer made of urethane or the like, a vinyl chloride-based, olefin-based, acrylic-based, etc. There is a sheet waterproof layer made of a resin sheet. In this case, the insulating sheet 63 may not be laid. However, in the case where the watering board A for greening is adversely affected by contact with the waterproof layer 62, the waterproof layer is used. An insulating sheet 63 is laid between 62 and the water retention board A for greening. That is, for example, when the waterproofing layer 62 is formed of a vinyl chloride-based sheet waterproofing layer and the greening water retention board A is formed of a polystyrene resin foam molded article, the plasticizer added to the vinyl chloride-based sheet uses the greening water retention board A. In some cases, the water retention board A for greening may be deformed due to the shift to the polystyrene resin system, and in such a case, the insulating sheet 63 is laid. Therefore, as the insulating sheet, a sheet of polyethylene, polypropylene, urethane or the like or a foamed sheet is usually used in order to avoid the above-mentioned adverse effects.
A water-retentive and lightweight porous granular soil 64 such as pearlite, fired soil or pumice is inserted into the water-retaining recess 10 of the water-retaining board A for greening, and a water-retaining sheet 65 made of a nonwoven fabric is further placed thereon. Is laid, and soil 66 is deposited on the upper surface of the water retention sheet 65.
[0021]
According to the above-described configuration, a space is secured between the lower surface of the water retention sheet 65 and the bottom surface of the water flow ventilation grooves 21 and 22 by the water flow ventilation grooves 21 and 22. It communicates with the space in the drainage groove 50 on the back side of the watering board A for greening.
Therefore, the air introduced from the drainage vent 50 through the drainage vent 30 is diffused in the horizontal direction by the water vents 21 and 22, passes through the upper water retention sheet 65, and permeates into the soil 66. Become.
When water is sprinkled on the soil 66, water is stored in the storage portion 11 (see FIGS. 1 and 2) of the water holding recess 10, and excess water in the water holding recess 10 is used to communicate between the water holding recesses. By 41, the water-retaining concave portions 10 are successively dispersed.
If the amount of water sprinkled on the soil 66 is excessive, the excess water that overflows from the water holding recess 10 flows into the water flow ventilation grooves 21 and 22 and is diffused in the horizontal direction, and the drain water ventilation hole 30 is formed. The water flows through the inside and the drainage groove 50 in order, and is drained from the end of the watering board A for greening.
[0022]
【The invention's effect】
The present invention is configured as described above, and has the following functions and effects.
According to the first invention, since a water-permeable ventilation groove extending in a substantially horizontal direction is formed on the upper surface of the partition wall between the water-retaining recesses, a water-retaining sheet made of nonwoven fabric is laid on the upper surface of the partition wall, Even when soil is deposited on the sheet, a space is secured between the lower surface of the water retention sheet and the bottom surface of the water flow ventilation groove.
And, when the amount of water sprayed on the soil on the water retention board for greening is too large, this space diffuses excess water overflowing from the water retention recess in the horizontal direction or guides it to the end of the water retention board for greening to drain water. When there is no excess water overflowing from the water holding recess with a small amount of water spray, there is a ventilation channel to secure air essential for plant growth and diffuse the air in the horizontal direction and guide it into the soil. Become.
Therefore, excess water can be efficiently diffused and drained, and air can be introduced into the soil, which can dramatically promote plant cultivation.
[0023]
Furthermore, according to the second invention, the drainage vent drains excess water in the water-flowing ventilation groove to the back side of the watering board for greening, or the water-flowing ventilation groove from the rear side of the watering board for greening. Since the air is guided to the air, the drainage efficiency of the surplus water can be improved, and the air can be more reliably introduced into the soil.
Moreover, since the drainage vents are provided on the bottom surface of the water passage ventilation groove, even if a water retention sheet is laid on the upper surface of the water retention board for greening, the lower surface of the water retention sheet and the bottom surface of the water passage ventilation groove are not covered. The space secured between them can prevent the upper end opening of the drainage vent from being closed by the water retention sheet.
[0024]
Further, according to the third invention, before the water accumulated in the water retention recess is diffused or discharged by the water passage ventilation groove and the drainage ventilation hole, the water retention recess communication passage communicates with the adjacent water retention recess one after another. And can be dispersed.
In addition, since it becomes difficult for surplus water in the water holding recess to flow into the water flow ventilation groove, the effect of securing and diffusing air by the water flow ventilation groove and the effect of introducing air by the drain water ventilation hole can be improved.
[0025]
Furthermore, according to the fourth invention, the connection of the plurality of water retention boards for greening can be surely performed by the fitting portion and the fitted portion which are fitted in an uneven shape, so that the connection portion is formed in the communication groove between the water retention recesses. Even if it does, the effect of dispersing the excess water by the communication groove between the water holding recesses is not impaired due to water leakage from the connection point.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a watering board for greening according to the present invention, in which main parts are cut away.
FIG. 2 is a sectional view of a main part showing a state in which two water retention boards for greening are connected, wherein (a) is a cross section taken along line (a)-(a) in FIG. 1, and (b) Is a cross section taken along line (b)-(b) in FIG.
FIG. 3 is a cross-sectional view showing a state where plants are cultivated on the rooftop using the watering board for greening.
[Explanation of symbols]
10: Water retention recess 12: Upper part a1, a2, a3: Partition wall 21, 22: Water passage ventilation groove 30: Drain ventilation hole 41, 42: Water retention recess communication groove 50: Drain ventilation groove A: Water retention board for greening

Claims (4)

A water retention board for greening having a plurality of water retention recesses formed on its surface,
A water retention board for greening, wherein a water flow ventilation groove extending in a substantially horizontal direction is formed on an upper surface of a partition wall between the plurality of water retention recesses. The water retention board for greening according to claim 1, wherein a drainage ventilation hole penetrating to a back surface side is formed in a bottom surface of the water passage ventilation groove. The water retention board for greening according to claim 1 or 2, wherein a communication groove between the water retention recesses that communicates the water retention recesses is formed between the upper portions of the adjacent water retention recesses. A fitting portion is formed on one of the opposing side surfaces so that the plurality of greening water retention boards are joined by side surfaces, and the other side surface is fitted into the fitting portion in an uneven manner. The watering board for greening according to any one of claims 1 to 3, wherein a portion is formed.

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