JP2017121213A - Plantation plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plantation plate which can improve strength and weather resistance while suppressing weight increase, and which can control contamination and reduce the cultivation cost of crops.SOLUTION: A plantation plate 1 which is used in floating situation on a nutrient solution S within a water tank T in hydroponics, has a plurality of planting holes H penetrating toward the thickness direction, and holds a seedling P of the crop in the planting hole H to cultivate crops with the nutrient solution S is configured with a substrate 2 which is a foaming-synthetic-resin plastic body and a plastic paint film 3 which covers the substrate 2 and is a paint film of a solventless type plastic paint. Since the surface of the substrate 2 of a foaming-synthetic-resin plastic body which is lightweight is covered with the plastic paint film body 3, strength and weather resistance are improved while suppressing weight increase. In addition, since the roots of algae and crops, and the like do not encroach into the fine gaps of the substrate 2 which is a foaming-synthetic-resin plastic body, contamination of the planting plate 1 can be suppressed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fixed planting plate that is used in a hydroponics state floated on a nutrient solution in a water tank, and holds a seedling of the crop in a fixed planting hole and grows the crop with the nutrient solution.

  In hydroponics that grows crops using nutrient solution instead of soil, a fixed planting board that holds the seedlings of the crop in a state of floating in the nutrient solution in the aquarium is used. This fixed planting plate is in the form of a rectangular plate having a plurality of fixed planting holes penetrating in the thickness direction, and foamed synthetic resin particles (beads) are subjected to in-mold foam molding from the viewpoint of cost reduction and weight reduction. The thing made from the polystyrene foamed resin shape | molded by the method has been used abundantly (for example, refer the cover 4 of patent document 1, the fixed planting board 7 of patent document 2, and the fixed planting board 1 of patent document 3).

Japanese Utility Model Publication No. 01-072054 Japanese Patent Laid-Open No. 10-248416 Japanese Patent Laid-Open No. 10-271926

The fixed-planting plate formed by in-mold foam molding of the foamed synthetic resin particles as in Patent Documents 1 to 3, although the foamed synthetic resin particles are foamed and melted by steam heat at the time of molding, are integrated with each other. If observed, fine gaps remain.
Therefore, as such a fixed planting plate is used in a state where the seedling of the crop is held in the fixed planting hole and floated on the nutrient solution, the roots of the algae and the crop bite into the gap, so that the fixed planting plate is contaminated. The

In the case of recycling and using the contaminated fixed planting board, it is necessary to clean and remove algae or crop roots that have engulfed into the gaps in order to improve hygiene and crop growth. is there.
However, since the roots of algae and crops have entered the gaps of the fixed planting plate, they cannot be removed sufficiently even by rubbing the surface of the fixed planting plate with a brush or the like during washing with water. Since the surface strength is not large, the surface may be damaged.
Therefore, there is a possibility that the yield of the crop may be reduced, and the labor for the cleaning work and the like will be increased, and the cultivation cost of the crop will increase.

  Therefore, in view of the above-described situation, the present invention intends to provide a fixed planting plate that can improve strength and weather resistance while suppressing increase in weight, suppress contamination, and reduce crop cultivation costs. It is in.

  The fixed planting plate according to the present invention is used in a state where it floats on the nutrient solution in the water tank in hydroponics for solving the above problems, and has a plurality of fixed planting holes penetrating in the thickness direction. A fixed planting plate that holds a seedling of a crop and grows the crop with the nutrient solution. It is comprised by the resin coating film body which is a coating film (Claim 1).

According to such a configuration, since the resin coating film covering the surface of the substrate is a coating film of a solventless type synthetic resin paint, the substrate which is a foamed synthetic resin molded body is not eroded.
In addition, since the surface of the base made of the foamed synthetic resin molding that is lightweight is covered with the resin coating film, the strength against cracking, bending, shredding and abrasion of the fixed planting plate while suppressing an increase in weight, and It is difficult to cause alteration such as deformation, discoloration, and deterioration, and weather resistance is dramatically improved.
Furthermore, since the surface of the substrate made of the foamed synthetic resin molding having fine gaps is covered with the resin coating body, algae and crop roots do not bite into the fine gaps. The contamination of the board can be suppressed. Therefore, the frequency of cleaning the planting plate is reduced and the plant can be efficiently cleaned, so that the cleaning work is not troubled, the planting plate is not damaged or worn, and the yield of the crop is not reduced. The cultivation cost of can be reduced.

Here, it is preferable that the resin coating film has a thickness of 0.2 mm or more and 0.7 mm or less, more preferably 0.3 mm or more and 0.6 mm or less.
According to such a configuration, the thickness of the resin coating body is 0.2 mm or more and 0.7 mm or less, more preferably 0.3 mm or more and 0.6 mm or less, and the thickness is maintained while maintaining a required strength. Since the thickness is relatively thin, an increase in weight due to the resin coating can be reduced, so that an increase in work burden accompanying an increase in weight can be suppressed.

The foamed synthetic resin is more preferably a foamed polystyrene-based resin (claim 3).
According to such a configuration, since the foamed synthetic resin for molding the base is a foamed polystyrene resin, a lightweight and low-cost base can be obtained.
In addition, since the substrate is covered with the resin coating body to become a fixed planting board, the resin coating body can give a required strength to the fixed planting board. Therefore, since the polystyrene foam resin for molding the substrate can be made into a low-cost product with a high expansion ratio, the manufacturing cost of the substrate can be reduced.

Furthermore, it is more preferable that the resin coating body contains at least one of an algae, a visible light responsive photocatalyst, and a white pigment (claim 4). You may coat | cover with the 2nd resin coating film body which is a coating film of the synthetic resin coating material in which at least one of the anti-algae agent, visible light responsive photocatalyst, and white pigment entered.
By adding an anti-algae agent to the outermost resin coating or the second resin coating on the planting plate, it is possible to suppress the generation of algae that need to be washed frequently. Can be reduced.
By putting a visible light responsive photocatalyst into the outermost resin coating body or second resin coating body of the planting plate, it has a high antifouling action and antibacterial action even in an indoor low light environment, so it is less likely to be contaminated, A fixed planting board having an antibacterial function can be obtained.
By adding a white pigment to the outermost resin coating body or second resin coating body of the planting board, the planting board is colored white, so that the reflectance of the planting board important in visible light cultivation can be increased. At the same time, the deterioration with time can be prevented.

As described above, according to the fixed planting plate according to the present invention,
(1) The structure in which the surface of the substrate is covered with the resin coating, and the strength and weather resistance of the fixed planting plate can be dramatically improved while suppressing an increase in weight.
(2) Algae and crop roots do not bite into the fine gaps of the substrate, which is a foamed synthetic resin molded body, and contamination of the fixed planting board can be suppressed, so that it does not take time for cleaning operations and the yield of crops is reduced. Not to reduce the cost of crop cultivation,
There are remarkable effects such as.

It is a fragmentary longitudinal cross-section which shows an example of the hydroponics using the fixed planting board which concerns on Embodiment 1 of this invention. It is a perspective view of the said fixed planting board. It is a principal part expanded vertical sectional view of the said fixed planting board. It is a principal part expansion longitudinal cross-sectional view of the fixed planting board which concerns on Embodiment 2 of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste.

Embodiment 1 FIG.
1 is an example of hydroponics using the fixed planting plate according to Embodiment 1 of the present invention, and shows seedlings P, P,... Of crops such as leaf vegetables grown using urethane U as a medium. The state which transplanted to the fixed planting holes H, H, ... of the fixed planting board 1, and the fixed planting board 1 was floated in the nutrient solution S in the water tank T is shown.
The seedlings P, P,... Of the crops in the fixed planting holes H, H,... Grow while absorbing nutrients from the roots extending into the nutrient solution S while being kept at an appropriate interval by the fixed planting board 1. Hydroponic cultivation is carried out until the crop becomes a crop in the state shown in 1.

As shown in the partial vertical cross-sectional view of FIG. 1, the perspective view of FIG. 2, and the enlarged vertical cross-sectional view of the main part of FIG. 3, the fixed planting board 1 according to Embodiment 1 of the present invention has a plurality of penetrating holes in the thickness direction. This is a rectangular plate-like form having fixed planting holes H, H,..., A base 2 that is a foamed synthetic resin molded body, and a coating film of a solventless type synthetic resin paint that covers the surface of the base 2. It is comprised by the resin coating body 3.
The rectangular plate-shaped fixed planting plate 1 has a long side of 890 mm, a short side of 590 mm, a thickness of 30 mm, a long side of 960 mm, a short side of 590 mm, a thickness of 25 mm, and the like. The size is not limited. In addition, when the weight of the fixed planting board 1 of the present invention becomes too heavy by providing the resin coating film body 3, the resin coating film body 3 is covered with the resin coating film body 3 after being set to, for example, half the size described above. If it makes it, since the weight of the fixed planting board 1 will become light and operativity will increase, it is preferable. In this way, when the size is cut in half, the cut surface is also covered with the resin coating 3, so that the surface strength does not decrease, and no problem occurs.
Moreover, the diameter of the fixed planting hole H is about 25-30 mm, and the number of the fixed planting holes H is parallel in addition to the four rows of 7, 8, 7, and 8 in a staggered arrangement as shown in FIG. The arrangement can be of an appropriate arrangement and number, such as four in each of eight rows, and the shape of the fixed planting hole is not limited to a round hole, but is a square hole or an elliptical hole. May be.

As the foamed synthetic resin for molding the substrate 2, for example, a foamed polystyrene-based resin or a foamed polyolefin-based resin can be used, and among them, the foamed polystyrene-based resin is mainly preferable from the viewpoint of cost.
Furthermore, since the polystyrene foam resin has a weaker surface strength than other resins, the resin coating 3 according to the present invention is provided on the surface of the fixed planting board 1 to prevent the invasion of algae and crop roots. This is extremely useful for preventing cracks and chips on the surface.
Therefore, the polystyrene foam resin for molding the substrate 2 can be made a low-cost product with a high expansion ratio, so that the manufacturing cost of the substrate 2 can be reduced. Moreover, since the base | substrate 2 can be reduced in weight by setting it as a high foaming ratio, the weight increase of the fixed planting board 1 formed by covering the base | substrate 2 with the resin coating film body 3 can be reduced.
For example, the fixed-planting board 1 which covers the base body 2 with the resin coating body 3, whereas the foaming ratio of the fixed-planting board made of only the expanded polystyrene resin base body 2 which is not covered with the resin coating body 3 is about 40 times. The expansion ratio of the base 2 made of expanded polystyrene resin in can be about 60 to 70 times.

As the solventless synthetic resin coating, a urethane resin which is a polymer compound formed by copolymerization of an isocyanate and a polyol can be used, but a synthetic resin other than the urethane resin may be used.
For example, the hard type (isocyanate (N liquid): SH-4000N, polyol (R liquid): SH-110R) of the trade name “Efletane” (registered trademark) which is a urethane resin for coating manufactured by Taisei Kayaku Co., Ltd. The resin coating body 3 can be formed by spraying and coating the base body 2 using a spray device.

Since the urethane resin for coating is a low-viscosity liquid, the surface of the substrate 2 can be coated without diluting at the time of use, and it is a two-component reaction type and fast-curing. To harden.
Further, since the urethane resin for coating is a solventless type, the base 2 that is a foamed synthetic resin molded body does not erode.
Thus, the resin coating 3 formed so as to cover the surface of the substrate 2 is rich in elasticity unique to urethane, exhibits tough properties excellent in impact resistance, and has a smooth and glossy surface. It will be something.
In addition, it is preferable to use the resin coating film body 3 used for this invention which was adapted to the food hygiene law.

In the case where the resin coating 3 is a urethane resin, the specific gravity is relatively large as about 1.03 to 1.18. From the viewpoint of reducing the burden when performing work using the fixed planting board 1, It is better to make the thickness of the resin coating body 3 as thin as possible while maintaining the strength.
That is, the thickness of the resin coating 3 is preferably 0.2 mm or more and 0.7 mm or less, more preferably 0.3 mm or more and 0.6 mm or less.
Here, when the resin coating 3 is formed by spray coating, once applied, the thickness becomes about 0.4 mm to 0.5 mm, and when applied twice, about 0.8 mm to 1.0 mm. It becomes the thickness of. Therefore, in order to reduce the weight of the fixed planting plate 1 as much as possible, it is preferable to form the resin coating body 3 by once coating the fixed planting plate 1 by spray coating.
Thus, since the thickness of the resin coating film body 3 is relatively thin while maintaining the required strength, the increase in weight due to the resin coating film body 3 can be reduced. Can be suppressed.

According to the configuration of the fixed planting plate 1 having the above-described configuration, the surface of the base 2 made of the lightweight foamed synthetic resin molded body is covered with the resin coating body 3, so that the fixed planting plate is suppressed while suppressing an increase in weight. The strength against cracking, bending, tearing and abrasion of 1 and deterioration such as deformation, discoloration, and deterioration are unlikely to occur, and weather resistance is greatly improved.
In addition, since the surface of the substrate 2 made of a foamed synthetic resin molding having a fine gap is covered with the resin coating 3, algae and crop roots do not bite into the fine gap. Contamination of the fixed planting board 1 can be suppressed. Therefore, since the frequency of washing the planting plate 1 is reduced and can be efficiently washed, there is no time and effort for the washing operation, and the planting plate is not damaged or worn, and the yield of the crop does not decrease. Crop cultivation costs can be reduced.

The resin coating 3 is more preferably one containing at least one of an algae, a visible light responsive photocatalyst, and a white pigment.
By adding an anti-algae agent to the resin coating 3, it is possible to suppress the generation of algae that need to be washed frequently, so that the number of washings of the fixed planting plate 1 can be greatly reduced.
By inserting a visible light responsive photocatalyst into the resin coating 3, it has a high antifouling action and antibacterial action even in an indoor low-light environment, so that it is possible to obtain a fixed planting plate 1 that is further less contaminated and has an antibacterial function.
By adding a white pigment to the resin coating 3, the fixed planting plate 1 is colored white, so that it is possible to prevent a decrease in the reflectance of the fixed planting plate 1 that is important in visible light cultivation.

Here, organic anti-algae can be used as the anti-algae.
For example, the product name "Monside" (registered as an industrial algae / antifungal agent manufactured by Osaka Gas Chemical Co., Ltd.), which contains an organic nitrogen compound, organic nitrogen sulfur compound, or organic iodine compound as an active ingredient. By blending the trademark ST with the urethane resin for coating, the resin film body 3 can be made to contain an algaeproofing agent.
Further, as the visible light responsive photocatalyst, a non-titanium oxide composite visible light responsive photocatalyst that exhibits a catalytic effect even with purple or blue light having a wavelength longer than that of ultraviolet light can be used.
For example, the product name “Runecat” (registered trademark), which is a visible light responsive photocatalyst manufactured by Toshiba Materials Co., Ltd., is mixed with the urethane resin for coating, so that the resin coating 3 is filled with a visible light responsive photocatalyst. Can be a thing.
Furthermore, as the white pigment, a general white pigment such as titanium dioxide or zinc white can be used, and the resin coating 3 can be colored white by mixing the white pigment into the coating urethane resin.
In addition, it is recommended to use an algae-proofing agent, a photocatalyst, a pigment and the like used in the present invention that comply with the Food Sanitation Law.

Embodiment 2. FIG.
In the fixed planting board 1 which concerns on Embodiment 2 of this invention shown in the principal part expansion longitudinal cross-sectional view of FIG. 4, the same code | symbol as FIGS. 1-3 of Embodiment 1 has shown the same or equivalent part.
The fixed planting board 1 according to the second embodiment includes a base body 2 that is a foamed synthetic resin molded body, a resin coating body 3 that is a coating film of a solventless synthetic resin coating that covers the surface of the base body 2, and a resin. It is comprised by the 2nd resin coating film body 4 which is a coating film of the synthetic resin paint which covers the coating film body 3.
Here, since the 2nd resin coating film body 4 covers the resin coating film body 3, it is not necessary to make it a solventless type, and a solvent containing type may be sufficient as it.
For example, the second resin coating film body 4 is formed by spraying a paint made of a synthetic resin material such as polyurethane resin, acrylic resin, alkyd resin, amino resin or the like on the resin coating film body 3 using a spray device. Can be formed.
In order to reduce the weight of the planting plate 1 as much as possible, it is preferable to form the second resin coating body 4 as thin as possible together with the resin coating body 3.
In addition, it is preferable that the 2nd resin coating film body 4 used for this invention uses what was adapted to the food hygiene law.

It is more preferable that the second resin coating 4 of the outermost layer of the planting plate 1 contains at least one of an algae, a visible light responsive photocatalyst, and a white pigment.
By adding an anti-algae agent to the second resin coating 4, it is possible to suppress the generation of algae that need to be washed frequently, so that the number of washings of the planting plate 1 can be greatly reduced.
By adding a visible light responsive photocatalyst to the second resin coating 4, it has a high antifouling action and antibacterial action even in an indoor low light environment, so that it is possible to obtain a fixed planting plate 1 that is further less contaminated and has an antibacterial function. .
By adding a white pigment to the second resin coating 4, the planting plate 1 is colored white, so that the reflectance of the planting plate 1 that is important in visible light cultivation can be increased and its deterioration with time can be reduced. Can be prevented.

DESCRIPTION OF SYMBOLS 1 Fixed planting board 2 Base | substrate 3 Resin coating film body 4 2nd resin coating body H Fixed planting hole P Crop seedling S Nutrient solution T Water tank U Urethane

Claims (5)

In hydroponic cultivation, it is used in a state of floating in a nutrient solution in a water tank, and has a plurality of fixed planting holes that penetrate in the thickness direction. Is a fixed planting board,
A fixed planting board comprising: a base body which is a foamed synthetic resin molded body; and a resin coating body which is a coating film of a solventless synthetic resin coating covering the surface of the base body.   The fixed planting board of Claim 1 whose thickness of the said resin coating film body is 0.2 mm or more and 0.7 mm or less, More preferably, it is 0.3 mm or more and 0.6 mm or less.   The fixed planting board according to claim 1 or 2, wherein the foamed synthetic resin is a foamed polystyrene resin.   The fixed planting board according to any one of claims 1 to 3, wherein the resin coating body contains at least one of an anti-algae, a visible light responsive photocatalyst, and a white pigment. The said resin coating film body is covered with the 2nd resin coating film body which is a coating film of the synthetic resin coating material in which at least one of the algaeproofing agent, the visible light responsive photocatalyst, and the white pigment entered. The fixed planting board of any one of 3.

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