JP4072391B2 - Water retention board for greening - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water retention board for greening that is laid on a rooftop of a building, a veranda of a general house, or the like and on which soil for cultivating plants is deposited.
[0002]
[Prior art]
In recent years, as part of environmental measures such as mitigation of heat island phenomenon in urban areas and CO2 reduction, there is a lot of movement toward greening by depositing lightweight soil on rooftops and verandas of buildings and cultivating flowers, grass, trees, etc. It has become.
Conventionally, as a mat laid for depositing lightweight soil on the rooftop or veranda of a building, for example, there is a water retention mat for rooftop greening disclosed in Japanese Patent Application Laid-Open No. 2000-14246.
The mat is formed with a plurality of water retaining recesses on the upper surface of the mat made of synthetic resin, and a flat portion is formed on the upper surface of the partition wall between the plurality of water retaining recesses. The excess water that is retained and overflows from the water retaining recess is transmitted to the flat portion to be diffused or drained.
[0003]
However, according to the above prior art, when a water retaining sheet made of a nonwoven fabric or the like is laid on the top surface of the mat, and soil is deposited on the water retaining sheet, the water retaining sheet strongly adheres to the surface of the flat portion protruding upward. Because of the contact, there is no space on the surface of the flat portion, and there is a concern that the excess water overflowing from the water retaining recess cannot be diffused and drained smoothly.
Moreover, in order to promote the cultivation of plants, in addition to the above-mentioned diffusion and drainage of surplus water, it is indispensable to supply air into the soil. Was not done.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional circumstances, and the objective treatment is to provide a water retention board for greening that can efficiently diffuse and drain excess water and guide air into the soil. There is to do.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is a water retention board for greening in which a plurality of water retention recesses are formed on a surface supporting a water retention sheet, and is substantially horizontal on the upper surface of a partition wall between the plurality of water retention recesses on the surface. A water passage ventilation groove extending in the direction is formed, and a water retention recess communication groove is formed on the upper surface of the partition wall between the adjacent water retention recesses to communicate between the upper portions of the water retention recesses. The groove is characterized by dividing the water flow ventilation groove.
[0006]
Furthermore, the present invention is characterized in that a drain vent hole penetrating to the back surface side is formed at the bottom of the water vent groove .
Furthermore, the present invention forms a fitting portion on one side facing each other so that the plurality of water retention boards for greening are joined to each other, and the other side has an uneven shape on the fitting portion. The to-be-fitted part which fits in was formed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of the water retention board A for greening which is an embodiment of the present invention will be described based on the drawings.
The water retention board A for greening is a foam molded body made of a synthetic resin such as polystyrene resin, polyethylene resin, polypropylene resin, ethylene-vinyl acetate resin, vinyl chloride resin, urethane resin, and a plurality of water retention recesses 10 are formed on the surface thereof. , Water passage vents 21, 22 extending in the XY direction, drainage vents 30 disposed on the bottom surface of the water passage vent, and communication grooves 41 between the water retaining recesses in the XY direction communicating the adjacent water retaining recesses 10. , 42 and the like, the drainage ventilation groove 50 is formed on the back surface, and the fitting portion 71 and the fitting portion 72 are formed on the side surface.
[0008]
The water retaining recess 10 is a bottomed hole having a rectangular shape in plan view, and has a storage portion 11 narrowed in an inverted trapezoidal shape in the longitudinal section on the bottom side.
The width dimension (the dimension in the X direction in FIG. 1) of the water retaining recess 10 is not particularly limited, but porous granular soil such as pearlite, baked soil, pumice, etc. is easily inserted into the water retaining recess 10. In view of the above, it is preferably 10 mm or more, and is preferably 70 mm or less so that it is easy to walk during work and the inserted porous grain soil is not crushed and cracked, and is a particularly preferable example of the present embodiment. According to this, it is set within a 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 the water retaining recesses 10 and 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 a <b> 2 and a <b> 3 partition the water retaining recesses 10, 10 aligned in the X direction. One partition wall a2 is wider than the other partition wall a3, and is arranged for each of the two water retaining recesses 10 and 10. On the upper surface of the partition wall a2, there is a water passage ventilation groove 22 in the Y direction. 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 concave shape in the longitudinal section, and extends in a substantially horizontal direction.
Further, drain vent holes 30 are formed at predetermined intervals on the bottom surface of the water flow vent groove 21 in the X direction so as to include the intersection of the water flow vent groove 21 and the water flow vent groove 22 in the Y direction. Yes.
[0012]
In addition, according to an example of this 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 shape. Two water retaining recesses 10 are arranged in each lattice formed by the water flow vents 21 and 22. Further, a water flow vent is formed on the upper surface of the partition wall a3 to further increase the water flow rate. You may make it improve air permeability.
[0013]
The drainage vent hole 30 is penetrated from the bottom surface of the water flow vent groove 21 in the X direction to the upper surface of the drain vent groove 50 on the back side of the water retention board A for greening, and from the drain vent groove 50 to the water vent groove 21. , 22, and drainage from the water vent grooves 21, 22 to the drain vent groove 50.
[0014]
The water retaining recess communication grooves 41 and 42 in the X direction and the Y direction are formed between the upper portions 12 and 12 of the adjacent water retaining recesses 10 and 10 so as to communicate with each other. The communication groove 41 between the water retaining recesses in the X direction divides the water ventilation groove 22 and the partition walls a2 and a3 in the Y direction, and the communication groove 42 between the water retaining recesses in the Y direction is the water passage ventilation groove 21 in the X direction. And the partition wall a1 is divided.
These water retaining recess communication grooves 41, 42 disperse excess water overflowing from the reservoir 11, which is the lower portion of the water retaining recess 10, to other water retaining recesses 10 adjacent in the XY direction.
[0015]
The drainage ventilation groove 50 is provided on the back side of the water retention board A for greening so as to cross at least the drainage ventilation hole 30 so as to secure air introduced into the drainage ventilation hole 30 or to pass water. It becomes a passage for draining the water that has flowed into the drain vent hole 30 from the vent grooves 21 and 22.
According to a preferred example of the present embodiment, the drainage ventilation groove 50 corresponds to the water passage ventilation groove 21 in the X direction and the water ventilation groove 22 in the Y direction, respectively. The lower end opening of the drain vent hole 30 is disposed on the upper surface in the groove 50.
[0016]
In addition, on the outer circumferential side surface of the water retention board A for greening, a fitting portion 71 is formed on one side surface facing each other so that the plurality of water retention boards for greening are joined to each other, and the other side surface Is formed with a fitted portion 72 that fits into the fitting portion 71 in a concavo-convex shape (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 side surface is recessed inward, and is an example of this embodiment. According to this, it is formed on one of both side surfaces in the X direction and one of both side surfaces in the Y direction.
[0018]
The mated portion 72 has the upper half of the side surface of the water retention board A for greening recessed inward so that the mated portion 71 fits in an uneven shape, and the lower half of the side surface is outward. It is formed on the other of the two side surfaces in the X direction and on the other of the two side surfaces in the Y direction.
[0019]
In addition, the shape of the fitting part 71 and the to-be-fitted part 72 is not limited to this Embodiment, For example, while forming a fitting part in a longitudinal cross-section convex shape, it fits in the said fitting part. You may form in the vertical cross-section concave shape which fits.
[0020]
Next, an example of cultivating a plant on the roof 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, the waterproof layer 62 and the insulating sheet 63 are laid in order on the foundation concrete 61 on the roof of the building, and the water retention board A for greening is laid on the insulating sheet 63. In general, as a waterproof layer laid on the foundation concrete 61 on the roof of a building, an asphalt waterproof layer made of asphalt, a coating waterproof layer formed by applying urethane, vinyl chloride, olefin, acrylic, etc. There is a sheet waterproof layer made of a resin sheet. In this case, the insulating sheet 63 may not be laid. However, if the water retention board A for greening is adversely affected by contact with the waterproof layer 62, the waterproof layer An insulating sheet 63 is laid between 62 and the greening water retention board A. That is, for example, when the waterproof layer 62 is made of a vinyl chloride sheet waterproof layer and the water retention board A for greening is made of a polystyrene resin foam molded product, the plasticizer added to the vinyl chloride sheet is the water retention board A for greening. In this case, the insulating sheet 63 is laid down because the water retention board A for greening may be deformed. 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 adverse effects described above.
And in the water retention recessed part 10 of the water retention board A for greening, the porous granulated soil 64 which has water retention and lightweight, such as a pearlite, a baking soil, a pumice stone, is inserted, and also the water retention sheet 65 which consists of a nonwoven fabric on it. The soil 66 is deposited on the upper surface of the water retaining sheet 65.
[0021]
According to the above configuration, a space is secured between the lower surface of the water retaining sheet 65 and the bottom surface of the water flow ventilation grooves 21, 22 by the water flow ventilation grooves 21, 22. It communicates with the space in the drainage ventilation groove 50 on the back side of the water retention board A for greening.
Therefore, the air introduced from the drainage ventilation groove 50 through the drainage ventilation hole 30 is diffused in the horizontal direction by the waterflow ventilation grooves 21 and 22, passes through the upper water retention sheet 65 and permeates into the soil 66. Become.
In addition, when water is sprayed on the soil 66, water is stored in the reservoir 11 (see FIGS. 1 and 2) of the water retaining recess 10, and excess water in the water retaining recess 10 is communicated between the water retaining recesses. 41 is dispersed one after another to adjacent water retaining recesses 10.
Further, when the amount of water sprayed onto the soil 66 is excessive, excess water overflowing from the water retaining recess 10 flows into the water flow vent grooves 21 and 22 and is diffused in the horizontal direction, and the drain vent hole 30. The water is drained from the end portion of the water retention board A for greening through the inside and the drainage ventilation groove 50 in order.
[0022]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
For one, because it forms the water passing ventilation groove extending in the upper surface of the partition wall between the water retention recess to the substantially horizontal direction, water retaining sheet made of a nonwoven fabric on the upper surface of the partition wall is laid, over the-holding water sheet Even when soil is deposited on the surface, 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 there is too much water sprinkling to the soil on the water retention board for greening, this space is drained by diffusing excess water overflowing from the water retention recesses in the horizontal direction or leading to the end of the water retention board for greening. and becomes a water passage to or, when excess water is not flowing over the less water retention recess watering amount, ventilation path for guiding into the soil to diffuse air in the horizontal direction with that to ensure the essential air plant growth It becomes.
Therefore, the diffusion and drainage of surplus water can be efficiently performed, air can be guided into the soil, and the cultivation of plants can be promoted dramatically.
[0023]
Furthermore , the drainage vents drain excess water in the water flow vent groove to the back side of the water retention board for greening, or guide air from the back side of the water retention board for greening to the water flow vent groove. In addition to improving the drainage efficiency of surplus water, air can be more reliably introduced into the soil.
Moreover, since the drainage vents are disposed on the bottom surface of the water flow vent groove, even if a water retention sheet is laid on the top surface of the water retention board for greening, the bottom surface of the water retention sheet and the bottom surface of the water flow vent groove It is possible to prevent the upper end opening of the drain vent hole from being blocked by the water retaining sheet by the space secured between the two.
[0024]
Furthermore , the water accumulated in the water retaining recesses can be successively dispersed to the adjacent water retaining recesses by the water retaining recess communication grooves before being diffused or discharged by the water vent grooves and the drain vent holes.
And since the excess water in a water retention recessed part becomes difficult to flow into a water flow ventilation groove | channel, the securing and diffusion effect of the air by a water flow ventilation groove, and the air introduction effect by a drain ventilation hole can be improved.
[0025]
Furthermore , since the connection of the plurality of water retention boards for greening can be reliably performed by the fitting portion and the fitted portion that fit in a concavo-convex shape, even if the connection location is in the communication groove between the water retention recesses, the connection The dispersion effect of the excess water by the communication groove between the water retaining recesses is not impaired due to water leakage from the location.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a water retention board for greening according to the present invention, with a main part cut away.
FIG. 2 is a cross-sectional view of an essential part showing a state in which two water retention boards for greening are connected, (a) is a cross section taken along line (a)-(a) in FIG. 1, and (b) Is shown by a cross section taken along line (b)-(b) in FIG.
FIG. 3 is a cross-sectional view showing a state in which plants are cultivated on the roof using the water retention board for greening.
[Explanation of symbols]
10: Water retaining recess 12: Upper part a1, a2, a3: Partition wall 21, 22: Water vent groove 30: Drain vent hole 41, 42: Communication groove between water retaining recesses 50: Drain vent groove A: Water retention board for greening

Claims (3)

A water retention board for greening in which a plurality of water retention recesses are formed on a surface supporting a water retention sheet, and 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 on the surface, On the upper surface of the partition wall between the adjacent water retaining recesses, a water retaining recess communication groove that communicates between the upper portions of the water retaining recesses is formed, and the water retaining recess communication groove divides the water vent groove. A water retention board for greening.   The water retention board for greening according to claim 1, wherein a drainage ventilation hole penetrating to the back side is formed on the bottom surface of the water flow ventilation groove. A fitting portion is formed on one side surface facing each other so that the plurality of water retention boards for greening are joined to each other, and the other side surface is fitted into the fitting portion in an uneven shape. The water retention board for greening according to claim 1 or 2, wherein a portion is formed.

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