JP2001169658A - Formed product of artificial soil for greening building and panel for greening wall surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a formed product of an artificial soil sufficiently reduced in weight and excellent in soil holding power even when water is permeated. SOLUTION: This formed product 1 of an artificial soil for greening a building comprises a porous formed product consisting essentially of a granular artificial soil material containing swellable grains such as vermiculite and a water-resistant polyvinyl alcohol and obtained by swelling the grains, forming the grains and retaining the shape of voids formed in the artificial soil material with a cured product of the water-resistant polyvinyl alcohol. A water-resistant polyvinyl alcohol having >=1,700 degree of polymerization and >=98 mol% degree of saponification is preferably used as the water-resistant polyvinyl alcohol or a modified polyvinyl alcohol in which hydrcphobic groups are introduced into the molecular chain is preferably used as the water-resistant polyvinyl alcohol. The panels 2a and 2b for greening the wall surface are obtained by holding the formed product of the artificial soil with a frame unit and installing an engaging part 3 engageable with the wall to be greened in the frame unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial soil which is planted on the roof of a building such as a building, a roof, a veranda, an atrium, a structure such as a retaining wall or a pier, or the surface of another building. The present invention relates to an artificial soil molded article for greening a building and a panel for wall greening used in such a case.

[0002]

2. Description of the Related Art In general, important points of a building are covered with artificial soil, and cultivation plants are cultivated there for beautifully greening the artificial building to provide a calm atmosphere and a mental ease. Attempts have been made to give them a feeling.

[0003] Such greening is mainly performed on the roof of a building, a roof, a veranda, an atrium, or a structure such as a retaining wall or a pier, or the surface of another building. Various functions are required for artificial soil used so as not to be damaged or soiled.

[0004] That is, the artificial soil is as light as possible, and has a water retention property capable of growing plants in a thin layer.
And softness and breathability that do not hinder root growth.

[0005] By the way, ordinary soil has less air permeability and water retention than artificial soil, so that the soil layer necessary for growing plants needs to be formed quite thick, and the specific gravity is large. When used in a concrete basin or in a container such as a bag, there is a disadvantage that a large load is applied to the building.

Vermiculite and perlite are well known as porous artificial soil materials which are said to be low in specific gravity and light in weight. If necessary, relatively light soil materials such as peat moss, water moss and rock wool are mixed. Sometimes used. These artificial soil materials are in the form of granules, powders, or mixtures thereof (hereinafter, referred to as powders and granules). It is known that a material obtained by solidifying the material with a resin is used as a nursery bed material. I have.

[0007] As a nursery bed material obtained by solidifying granular pearlite with a water-soluble binder such as polyvinyl alcohol, Japanese Patent Application Laid-Open No. 48-26507 discloses
Molded nursery beds that can be used in automatic rice planters with rice action are described.

In Japanese Patent Application Laid-Open No. 2-128622, a water-soluble polymer (polyvinyl alcohol) is added as a binder to a mixture of natural soil and a fibrous material such as rock wool, and the density is 200 to 500 kg. / M
^A molding material for plant cultivation, which is heat-press molded into about ^three blocks, is described.

Further, Japanese Utility Model Laid-Open No. 6-38476 discloses that
It describes a nursery bed that is naturally collapsed or decomposed by microorganisms or the like when planted in pots, flower beds, fields, or the like, and is formed by molding a mixture of soil, water, and a resin powder of polyvinyl alcohol.

[0010]

However, all of the above-mentioned conventional soil compacts for plant cultivation are those in which the soil is hardened with a water-soluble polymer, and which can be placed on a building. Rather, when used for a long time, it dissolves in water or is decomposed by microorganisms and assimilated with natural soil,
It was not suitable for greening buildings.

That is, when soil formed by using water-soluble polyvinyl alcohol as a binder is installed so as to cover the roof of a building, a roof, a veranda, an atrium, or a structure such as a retaining wall or a pier, or the surface of another building. ,
Polyvinyl alcohol dissolves in water or is decomposed by microorganisms, natural or artificial soil flows out of the designated greening area of the building, and the spilled soil pollutes the building or clogs drainage pipes, etc. The problem is that this may impair the performance.

As polyvinyl alcohol having excellent water resistance, those having a high degree of polymerization and a high degree of saponification are commercially available from Kuraray Co., Ltd. However, a soil compact formed by mixing such water-resistant polyvinyl alcohol and a lightweight artificial soil that has been made porous in advance is difficult to sufficiently bind with polyvinyl alcohol, for example, when vermiculite particles are fragmented. The unbound portion is exposed and becomes easy to flow out with water, and the strength of the molded body gradually decreases, and it becomes difficult to replace the artificial soil and the planted plant with time.

[0013] Furthermore, when green walls such as vertically steep wall surfaces and steep slopes (hereinafter abbreviated as wall surfaces, etc.) are greened using artificial soil, the artificial soil becomes particularly easy to flow out with water and becomes wet with rainwater. Natural irrigation cannot be sufficiently expected due to its difficulty, and it is also difficult to irrigate so as to uniformly retain moisture in the wall direction, especially against gravity. Therefore, ivy,
Other than growing vine (vine) plants such as wisteria and morning glories over a long period of time, the walls and other areas could not be reliably greened, and there was no simple means of greening the walls to be completed in a short period of time.

Accordingly, the present invention solves the above-mentioned problems, and provides an artificial soil molded body which is sufficiently reduced in weight and has excellent soil holding power even when water permeates. It is easy to install by laying in the greening area of the part,
It is an artificial soil molded article for greening which is lightweight, can be easily replaced as needed, does not easily disintegrate even when water permeates, does not flow out of the soil, and does not impair the function and aesthetics of the building.

Further, it is possible to provide a panel for greening a wall surface which can easily and almost immediately green a substantially vertical wall surface or steep slope by using artificial soil in a short period of time and can easily irrigate water and which does not allow the artificial soil to flow out by rainwater or irrigation. is there.

Still another object of the present invention is to provide a panel for greening a wall surface which can be irrigated so that there is no difference in the amount of retained water at various points on the wall surface for greening.

[0017]

Means for Solving the Problems In order to solve the above problems, an artificial soil green compact for greening a building according to the present invention comprises a particulate artificial soil material containing swelling particles and water-resistant polyvinyl alcohol. As an essential component, a porous molded body formed by expanding the particles and molding the particles, wherein the voids formed in the artificial soil material at the time of the expansion are retained with a cured product of water-resistant polyvinyl alcohol. This is an artificial soil compact for greening of buildings. As swellable particles,
Vermiculite can be used.

In the artificial soil green compact for greening a building constructed as described above, when expanded particles are expanded, a cured product of water-resistant polyvinyl alcohol is filled in the voids formed in the artificial soil material. Since the shape is interposed, the shape of the porous molded body is reliably maintained with water-resistant polyvinyl alcohol, and the mechanical strength of the artificial soil molded body is increased, so that the molded body is less likely to collapse. Are securely held and these are hard to leak. For this reason, the artificial soil molded body does not stain the building or clog drainage pipes, and does not impair the function of the building.

When the expandable particles are expanded, the water-resistant polyvinyl alcohol is interposed in the voids as a columnar support or a three-dimensional network-like support, and the finely divided expandable particles are intercalated. Since the interval is maintained, the porous artificial soil molded body can be efficiently shaped with a small amount, and for example, an extremely lightweight artificial soil molded body having a density of the porous molded body of 200 to 500 kg / m ³ can be obtained. Can be provided.

Further, the above-mentioned artificial soil molded article for greening a building, wherein the water-resistant polyvinyl alcohol is a water-resistant polyvinyl alcohol having a degree of polymerization of 1700 or more and a degree of caking of 98 mol% or more, has particularly good water resistance. It becomes an artificial soil molded body having excellent soil holding power, which can be easily spread over the surface of the greening area of a part of the building and installed, and can be easily replaced.

Further, the water-resistant polyvinyl alcohol is highly crystallized by heat treatment, and a cross-linked structure of a thermosetting resin is introduced.
Or the artificial soil molded article for greening of the building, which is an acetalized modified polyvinyl alcohol, is further excellent in water resistance and excellent in soil holding power, and the soil does not pollute the building and clogs drainage pipes and the like. Without being impaired, the function of the building is not impaired, and it can be easily laid out and installed, and since it has good shape retention, it can be replaced very easily.

Further, in order to provide a panel for greening the wall surface in a short time simply and in a short time and not to flow out by rainwater or irrigation, the panel for greening the wall is formed by holding the above-mentioned artificial soil molded body in a frame. is there.

Further, in order to provide a panel for greening a wall surface which can be easily watered and can be watered so that there is no difference in the amount of water retained in each part of the wall surface, a water retention sheet and a waterproof sheet are provided on the back of the artificial soil molded body. The functional sheets were sequentially stacked, and these were collectively held by a frame to form a wall greening panel.

Furthermore, in order to provide a panel for wall greening that can easily be irrigated on a wall or the like, a water inlet is formed in a frame of the wall greening panel, and a water supply tube can be injected into the water inlet. It was a panel for greening the wall placed in the area.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION The particulate artificial soil material containing expandable particles used in the present invention contains expandable particles having the property of expanding due to heating, a chemical reaction, or the like. The material is not particularly limited as long as it is a relatively lightweight artificial soil material, and wood flour, charcoal, coconut husk, peach husk, etc. may be adopted. In addition, the main component may be in the form of particles, and may also include other forms such as powder, flakes, and fibers.

Specific examples of the expandable particles include pearlite, vermiculite, expanded polystyrene, and expanded polyurethane. Among them, those having a large expansion coefficient and preferable are perlite and vermiculite.

The pearlite may be either perlite or obsidian pearlite, and the size of the pearlite is usually 1 to 9, but if the formability and the degree of plant root tension are taken into consideration. No. 3 to No. 7 are preferable, and two or more kinds of pearlite may be used in combination.

Vermiculite is a hydrated silicate mineral very similar to the mica group mineral, has a hydroxyl group and water of crystallization in its crystal structure, and is heat-treated at about 800 ° C. or more, When the peroxide is brought into contact, it has a property of expanding and expanding (expanding) about 10 to 30 times so as to spread the interlayer. As the vermiculite used in the present invention, a raw vermiculite can be used irrespective of the place of production, but an ion-exchanged vermiculite produced by exchanging magnesium ions with cations such as sodium ions and ammonium ions may be used. Usually, the size of such vermiculite is preferably from No. 0 (0.1 mm square) to No. 4 (7 mm square), but from 2 to 4 is preferable for improving the growth of the root of the plant. And two or more kinds of sizes may be mixed and used.

The amount (after chemical expansion) of the vermiculite in the artificial soil material is 20 to 55% of the total volume of the compact.
And more preferably 35 to 45%. The chemically expanded vermiculite to be used is preferably a chemical-treated product having little effect on soil and having a swelling time and an exothermic temperature of 80 ° C. or more.

When calcined vermiculite is used and the resin binder is dissolved in warm water and mixed, 55% or less of the whole molded body is suitable, and more preferably 20 to 4%.
5%.

To chemically expand vermiculite, the peroxide is suspended or dissolved in an appropriate amount of a solvent, and this is mixed with the vermiculite. The vermiculite for chemical expansion used is preferably a chemical-treated product having little effect on the soil, and a type having an expansion time and an exothermic temperature of 80 ° C. or more.

As the peroxide used for chemically expanding vermiculite, hydrogen peroxide or an adduct of hydrogen peroxide (phosphate adduct, sulfate adduct, borate adduct, urea adduct) And inorganic peroxides, and organic peroxides. Examples of the organic peroxide include diacyl peroxides such as acetyl peroxide and benzoyl peroxide, ketone peroxides such as acetone peroxide, methyl ethyl ketone peroxide and cyclohexanone peroxide, t-butyl hydroperoxide, cumene hydroperoxide. Hydroxy or alkyl peroxides such as said, t-dibutyl peroxide and the like can be mentioned. Examples of the peroxide solvent include organic solvents such as water, esters such as ethyl acetate, ketones such as methyl ethyl ketone, alcohols such as isopropyl alcohol, and hydrocarbons such as hexane and benzene.

The higher the concentration of the above-mentioned peroxide in the vermiculite, the higher the degree of swelling of the vermiculite is preferable, and the time required for the swelling reaction can be shortened. When using hydrogen peroxide, it is appropriate to use an aqueous solution of about 1 to 35% using a commercially available aqueous hydrogen peroxide solution, and an aqueous solution of 15% or more is preferable because the swelling time is short.

The water-resistant polyvinyl alcohol used in the present invention is a synthetic resin synthesized by polymerizing vinyl acetate and saponifying the obtained polyvinyl acetate (polyvinyl acetate), and adjusting the degree of saponification and the degree of polymerization. A modified polyvinyl alcohol which has improved water resistance by heat treatment, or has high crystallization by heat treatment, introduction of a cross-linked structure of a thermosetting resin, or acetalization to increase water resistance.

As described above, one type of water-resistant polyvinyl alcohol suitable for the present invention is a completely saponified water-resistant polyvinyl alcohol having a degree of polymerization of 1700 or more and a degree of caking of 98 mol% or more. That is, polyvinyl alcohol has a high degree of polymerization and a high degree of saponification, but has low solubility in water. If the limit value considering practicality is shown, the degree of polymerization is 1700 to 2500 (or 240
0), with a degree of saponification of 98 to 99 mol%.

The modified polyvinyl alcohol having improved water resistance is obtained by changing the inherent water solubility of the polyvinyl alcohol by heat treatment, introduction of a crosslinked structure by addition of a thermosetting resin, or acetal treatment. The modified polyvinyl alcohol treated in this manner exhibits water resistance to such an extent that it does not dissolve in warm water or boiling water. As a commercially available modified polyvinyl alcohol having high crystallinity and further having a hydrophobic group introduced into the molecule, Kuraray: R
S polymers.

In the above heat treatment, in particular, completely saponified water-resistant polyvinyl alcohol is a polymer that is easily crystallized, and the heat resistance after curing can further increase the water resistance. As the heat treatment in that case,
Heat treatment at 160 ° C for 4-5 minutes or 180 ° C for 1-2 minutes is suitable.

As a treatment for introducing a crosslinked structure by adding a thermosetting resin, an initial condensate such as urea, melamine, or phenol resin is added to polyvinyl alcohol, for example, at 10% by weight.
By adding a suitable curing accelerator and subjecting it to a cross-linking reaction at the required temperature to copolymerize with a part of polyvinyl alcohol, or to introduce a cross-linked structure with a dispersed thermosetting resin to make water soluble. Can be prevented.

In the acetalization treatment, polyvinyl alcohol is acetalized by chemically reacting with formalin and other aldehydes using an acid catalyst.
Can be made water resistant.

In addition to the essential components described above, it is preferable to mix a fertilizer, a material for improving water permeability, a fibrous reinforcing material, and the like in the particulate artificial soil material.

Fertilizers can be used in order to give a sufficient application effect to the growth of plants.
By blending special fertilizers and the like, for example, an artificial soil molded body that does not require fertilization management for about 5 years can be obtained.
Further, the composition of the fertilizer component can be appropriately changed according to the purpose of greening and the type of plant.

As the soil material for improving water permeability, one or a mixture of two or more of carbonized wood, coconut husk, peach husk, etc. is used. The mixing amount is preferably in the range of about 0.5 to 15% by weight of the whole molded body.

In particular, when the molded body is formed into a panel type or the like, in order to improve the mechanical strength, a fibrous reinforcing material obtained by finely cutting plant fibers such as straw, corn fibers, and coconut fibers is used. It is preferable to mix them. The mixing amount is preferably in the range of about 0.5 to 10% by weight of the whole molded body.

The shape and size of the artificial soil compact in the present invention may be appropriately designed according to the purpose of greening the building, etc., but in consideration of productivity and versatility of the product, it is molded in a block. It is preferable to cut this and form it into a panel (flat or curved plate-like structure).

For example, when a panel having a basic dimension of 50 mm in thickness and a size of 300 mm square is used, the rectangular block size is set to 300 × 300 × 1000 mm, which is cut in the longitudinal direction to 50 × 300 × 300 mm. Ninety 300 mm panels are manufactured.

In the production of the above-mentioned block, when heating the particulate artificial soil material containing expandable particles such as vermiculite, the material may be heated by microwaves. Considering the penetration depth of the wave,
It is preferred to heat the panel rather than the block.

As described above, it is preferable that the artificial soil molded article for use in greening a building is in the form of a panel.
In order to more easily replace the artificial soil on a wall surface, a rooftop or the like, it is preferable to attach a handle to the panel. When molding the panel one by one, the handle can be fixed by placing the base of the handle (also referred to as a holding jig) in a molding die so as to be embedded therein and molding it as it is.

When the handle is manufactured by a microwave heating method, it is preferable to use a ceramic material or a synthetic resin having a heat-resistant temperature of 100 ° C. or more, avoiding metal.

Further, the artificial soil molded article of the present invention has a sheet or film made of woven fabric, nonwoven fabric, paper, highly water-absorbent resin, etc. having good water retention on the bottom surface and side surfaces thereof in order to enhance the water retention. It may be provided in combination with the above.

An embodiment of the invention relating to a wall greening panel will be described below with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the panel for greening a wall according to the embodiment is configured such that a plurality of formed block-shaped artificial soil compacts 1 are arranged side by side and held by a rectangular frame 2. 2, a hook-shaped locking portion 3 for installing a wall on the frame body.
Is provided. Then, on the back surface of the artificial soil molded body 1, the water retention sheet 4 and the waterproof sheet 5 are stacked in this order, and these are collectively held by the frame 2.

In such a panel for wall greening, the frame 2
A water inlet 6 is formed on the upper surface of the panel front part 2a, and a water supply tube 7 (FIG. 2) is disposed along the water inlet 6 so as to be able to inject water. The plant A for wall greening with a low height can be grown all over.

The illustrated frame 2 is formed in a lattice shape and forms a large opening area to hold the artificial soil compact 1 and a panel back 2 fixed to the wall to be greened.
b, which are assembled by fixing key points with a plurality of screws 8. The frame 2 is preferably made of a metal having low durability and required strength such as stainless steel, aluminum alloy, galvanized steel plate or the like, or a small-sized metal is preferably made of plastic and lightweight. Painted ones are preferred. As the plastic frame, a stampable sheet molded product or a sheet molding compound (SMC) molded product can be employed.

Although the opening of the panel front portion 2a is shown as being divided by the grid 9 and opening in a square shape, the opening may be divided into a large diamond-shaped mesh with a large mesh size, extending from the edge of the frame 2. By forming a holding portion such as a nail, a substantially entire opening may be formed without division.
As a specific example of the lattice or the mesh, a mesh of about 20 to 200 mm is adopted to obtain a preferable result.

The water retention sheet 4 is for uniformly supplying moisture from the back side of the artificial soil molded body 1, and employs a nonwoven fabric or a thick knitted woven fabric made of fibers that are hardly corroded. Specific examples include polyester felt and cotton felt, and the sheet may have a thickness of about 0.5 to 10 mm, and more preferably about 3 mm.

The waterproof sheet 5 prevents the water-retaining sheet 4 and the artificial soil molded article 1 from drying, and retains the moisture permeating the water-retaining sheet 4 for a long time. Also, the grown roots of the greening plant penetrate the wall greening panel,
It does not hinder the fixation to the wall. As such a waterproof sheet 5, a sheet made of a material such as rubber or plastic is suitable.

As shown in FIG. 2, the locking portion 3 has a hook-shaped turning edge portion which can be locked to a horizontal rail portion of a lattice-like construction 10 previously provided on a greening wall, and a panel rear portion 2b. Is shown at the upper edge, but is not limited to such a shape. For example, a locking hole and a nut that can be fixed to a bolt embedded in a wall, a pin, a buckle, and other well-known members. What is necessary is just what can respond to the stopping means. When a well-known locking tool (not shown) such as a claw that locks the edge of the frame 2 is provided on the lattice-shaped structure 10, the locking portion 3 is not provided on the frame 2. A wall greening panel can also be configured.

In order to arrange the water supply tube 7 on the upper surface of the frame 2 so as to be able to inject the water into the water inlet 6, a claw 11 cut into a rectangular shape on the upper surface of the frame 2 or a ring for inserting the tube,
It is preferable to provide a band or the like. Water supply tube 7
, Water supplied from a pressurizing pump (not shown) is supplied constantly or intermittently according to the required amount of irrigation, and a small hole for dropping or a water permeable portion is formed at a key point.

[0059]

Examples and Comparative Examples The physical properties (degree of polymerization, degree of saponification, presence or absence of modification) of polyvinyl alcohol used in Examples and Comparative Examples are shown below. In the tables, the abbreviations shown in <> are used. (1) Water-resistant polyvinyl alcohol (Kuraray: Poval, PVA-117) Degree of polymerization 1700, saponification degree 98 to 99 mol% <fully saponified PVA>, (2) Water-resistant polyvinyl alcohol (Kuraray: Poval, NSH-) 916) Degree of polymerization 1600, degree of saponification 99.4 mol% <highly saponified P
VA>, (3) Water-resistant polyvinyl alcohol (manufactured by Kuraray Co., Ltd .: Poval, RS-117), degree of polymerization 1700, degree of saponification 97 to 99 mol% <modified P
VA>, (4) Polyvinyl alcohol (manufactured by Kuraray: Poval, PVA-224) Degree of polymerization 2400, saponification degree 86.5 to 89.5 mol% <partially saponified PVA224> (5) Polyvinyl alcohol (manufactured by Kuraray: Poval, PVA-110) ) Degree of polymerization 1100, degree of saponification 98-99 mol% <partially saponified PVA110>.

[Examples 1-4, Comparative Examples 1-3] Soil materials (obsidian perlite, bark compost, slow-release fertilizer, straw) containing vermiculite in the composition (parts by weight) shown in Table 1 or Table 2 Mix with polyvinyl alcohol, put this in a mold for forming a square flat panel, and add 15%
Concentrated hydrogen peroxide solution or heated by microwave heating to expand vermiculite to 50 m
m × 300 mm × 300 mm porous (density 200
３００300 kg / m ³ ) An artificial soil panel was formed. The type of the chemical expansion or microwave heating of the expansion method is also shown in the table.

The obtained artificial soil panel was subjected to a one-year or two-year outdoor exposure test using a wall greening panel in the form shown in the figure, and the weather resistance was maintained by maintaining the shape of the block-type artificial soil molded product. Observed.

In order to examine the water resistance, the artificial soil molded body was immersed in running water, and the dissolution amount (the amount of weight loss) after 7 days and 300 days was examined. These results are shown in Table 1 or Table 2. It was also described in.

[0063]

[Table 1]

[0064]

[Table 2]

As is clear from the results shown in Tables 1 and 2, in Comparative Examples 1 and 2 using polyvinyl alcohol having a low degree of saponification or Comparative Example 3 using polyvinyl alcohol having a low degree of polymerization, the weather resistance was low. Is bad and eroded,
The weight was reduced by half, and in the water resistance test, the shape could not be maintained for 3 days in running water.

On the other hand, the embodiment using water-resistant polyvinyl alcohol has weather resistance that can withstand outdoor exposure for two years and water resistance that can withstand running water for 300 days and its weight hardly changes. Soil does not run off and does not pollute buildings or clog drainage pipes.
It was recognized that it had properties that did not impair the function of the building.

As a test for confirming the suitability for planting, Mexican stonecrop was cultivated for one year. In Examples 1-4, there was no abnormality in all the plants, and they were in a good growth state.

[0068]

As described above, according to the present invention, when a particulate artificial soil material containing swelling particles such as vermiculite is expanded, the voids formed in the artificial soil material are filled with water-resistant polyvinyl alcohol. Because it is an artificial soil molded product for greening of buildings, the shape of which is preserved with the cured material of the building, the shape of the porous molded product is reliably maintained with water-resistant polyvinyl alcohol to the inside, and has excellent water resistance and soil holding power It is low density and light enough, so it is easy to install and replace by simply laying in the green area of the building, and it does not run off the soil, so the building is polluted or clogs drainage pipes etc. There is an advantage that the function of the building is not impaired.

Further, in the above-mentioned artificial soil molded article for greening a building, the water-resistant polyvinyl alcohol has a degree of polymerization of 1
A water-resistant polyvinyl alcohol having a water resistance of 700 or more and a degree of caking of 98 mol% or more has particularly excellent water resistance and is suitable for greening of buildings.

[0070] In the above-mentioned artificial green compact for greening buildings, the modified polyvinyl alcohol in which the water-resistant polyvinyl alcohol has a hydrophobic group introduced into the molecular chain has better water resistance and has a higher soil holding power. It is excellent and does not impair the building and its function without fail.

Further, the panel for wall greening, in which the artificial soil molded body is held by the frame, can easily green the walls and steep slopes in a short period of construction, facilitate irrigation, and generate artificial soil from the wall greening panel. It has the advantage that it does not run out due to rainwater or irrigation.

Further, the invention relating to the wall greening panel in which a water injection port is formed in the frame body to allow water injection has an advantage that irrigation is easier, and furthermore, the wall greening panel provided with a water retention sheet and a waterproof sheet is provided. The panel has an advantage that it is a wall greening panel that can be irrigated so that there is no difference in the amount of retained moisture in each part.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of components showing an embodiment of the invention relating to a panel for wall greening.

FIG. 2 is a perspective view showing a use state of the embodiment of the invention relating to the wall greening panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Artificial soil molded object 2 Frame 2a Panel front part 2b Panel back part 3 Lock part 4 Water retention sheet 5 Waterproof sheet 6 Water inlet 7 Water supply tube 8 Screw 9 Lattice 10 Construction 11 Claw A Plant

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) E04C 2/26 E04C 2/26 Z E04B 2/00 2/46 Z (72) Inventor Kazuaki Toshikura Kita, Osaka 1-6-41 Oyodo-Kita-ku Nikko Kasei Co., Ltd. (72) Inventor Nobuhiko Awaya 1-6-141 Oyodo-Kita, Kita-ku, Osaka City Nikko Kasei Co., Ltd. (72) Inventor Masayuki Yanagi Tokyo Metropolitan Port 1-2-7 Moto-Akasaka-ku, Kashima Construction Co., Ltd. (72) Inventor Zen Kudo 2--19-1, Tobita-Shi, Chofu-shi, Tokyo Kashima Construction Co., Ltd.Technical Research Institute (72) Inventor Ken Shinkawa, Tokyo Metropolitan Port 1-2-7 Kamoto, Akasaka-ku Kashima Corporation F-term (reference) 2B022 AB04 BA01 BA04 BA07 BA12 BA14 BA21 BA22 BA23 BA25 BB03 CA04 DA19 2B027 NC02 NC05 NC14 NC18 NC21 NC24 NC37 NC39 NC41 ND02 QA04 Q C03 QC33 QC38 QC41 QD01 UA17 2D044 DA15 2D048 BA00 2E162 CA00 CA04 CB03 CB14 CD09 CE01

Claims (8)

[Claims] 1. A porous molded body comprising a particulate artificial soil material containing swellable particles and water-resistant polyvinyl alcohol as essential components, said particles being swelled and molded, and An artificial soil molded article for greening a building, characterized in that voids formed in the artificial soil material are maintained with a cured product of water-resistant polyvinyl alcohol. 2. The artificial soil compact for greening a building according to claim 1, wherein the expandable particles are vermiculite. 3. The artificial soil molded article for greening a building according to claim 1, wherein the water-resistant polyvinyl alcohol is a water-resistant polyvinyl alcohol having a degree of polymerization of 1700 or more and a degree of caking of 98 mol% or more. 4. The artificial soil molding for greening a building according to claim 1, wherein the water-resistant polyvinyl alcohol is a modified polyvinyl alcohol that has been subjected to high crystallization by heat treatment, introduction of a crosslinked structure of a thermosetting resin, or acetalization. body. 5. The density of the porous molded body is from 200 to 500.
greening artificial soil formed body of the building according to claim 1 which is kg / m ^3. 6. A panel for wall greening, wherein the artificial soil molded article according to claim 1 is held by a frame. 7. The wall greening panel according to claim 6, wherein a water retention sheet and a waterproof sheet are sequentially stacked on the back surface of the artificial soil molded body, and these are collectively held by a frame. 8. The panel for greening a wall according to claim 6, wherein a water inlet is formed in the frame, and a water supply tube is arranged so as to be able to inject the water into the water inlet.