JP2019135932A - Hydroponic system - Google Patents

Abstract

To provide a hydroponic system that can convey cultivation plates unfailingly.SOLUTION: A hydroponic system comprises: a nutritious liquid tank 1 whose planar shape is an approximately rectangular-shaped; a plurality of cultivation plates which are installed on both end walls 1a, 1b in the longer direction of the nutritious liquid tank 1 in a serially arrayed manner; and conveying means 2a, 2b, 2c, 2d for conveying a plurality of cultivation plates in the longer direction of the nutritious liquid tank 1. Then, the cultivation plate has means for connecting with an adjacent cultivation plate. Further, the conveying means 2a, 2b, 2c, 2d are conveying means which contact both sides of the cultivation plate which are parallel with the longer direction of the nutritious liquid tank 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hydroponic cultivation system, and more particularly to a hydroponic cultivation system for facilitating conveyance of a cultivation plate.

  A nutrient solution tank used in a plant factory or the like is a storage tank that stores a nutrient solution, and supplies water, nutrients, and the like required by the plant by immersing the roots of the plant in it. And in a nutrient solution tank, a plurality of cultivation plates are arranged in series. An operator is configured so that the cultivation plate can be installed by sequentially placing and conveying the cultivation plate on one end of the nutrient solution tank without moving.

  In recent years, as plant factories and the like have increased in size, nutrient solution tanks as long as 50 m have been used. As the length of such a nutrient solution tank increases, the number of cultivation plates used in one nutrient solution tank increases, and the area of the cultivation plate also increases. Therefore, the total weight of the cultivation plate used in one nutrient solution tank may reach several tens to 100 kg, and it is becoming difficult to convey it manually. Then, the automatic conveyance mechanism of the plate for cultivation is considered.

  For example, a system has been proposed in which cultivation plates arranged in series are transported by being placed on transport means such as a transport rope or a transport chain conveyor. In order to quickly transport the cultivation plate to the vicinity of the shipping work site, the material for the cultivation plate is taken into consideration and placed on a conveying means made of a material having a relatively high friction coefficient, so that the cultivation plate can be quickly delivered to the vicinity of the shipping work site A panel for cultivation is conveyed (for example, patent documents 1).

In advanced hydroponics, the transport mechanism is required not only to be used for harvesting but also to be used for moving the cultivation plate to a different nutrient solution tank.
For example, in plants such as vegetables, it is known that pre-harvest treatment is effective in order to improve the ORAC value (active oxygen absorption capacity value) and reduce the amount of nitrate ions contained. For example, a method for producing vegetables by hydroponics under artificial lighting in a state in which nutrition, light, water, and temperature as growth conditions are controlled, and the grown vegetables are put in water immediately before harvesting. A production method characterized in that the production method is characterized in that it is replaced and is subjected to hydroponics for a period of 1 day or more and 7 days or less with a day length of 17 hours or more and an upper limit of light intensity in the day length of 20000 lux. It has been proposed (for example, Patent Document 2).

  In the mass production site, replacing the nutrient solution in the nutrient solution tank with a different nutrient solution during the cultivation is substantially difficult in terms of management and increases the production cost. Therefore, it is necessary to provide a nutrient solution tank for normal nutrient solution and a nutrient solution tank for nutrient solution just before harvesting, and to move the cultivation plate from the former nutrient solution tank to the latter nutrient solution tank. .

JP2008-86248 JP2015-192682A

  In the conveyance system as disclosed in Patent Document 1, liquid such as nutrient solution adheres to the cultivation plate, the coefficient of friction with the conveyance means decreases, and the cultivation plate becomes slippery with respect to the conveyance means. There was a problem. Alternatively, the cultivation plate to which the liquid is attached and the cultivation plate to which the liquid is not attached have a large difference in the friction coefficient with the conveying means, resulting in variations in the conveyance of the entire plurality of cultivation plates, and stable. There has been a problem that the conveyance becomes difficult. Considering the material of the cultivation plate, it has been devised to carry it on a conveyance means made of a material with a relatively high friction coefficient, but it is sufficient to transmit the conveyance force to the cultivation plate sufficiently. It could not be said that it was a devise.

  Further, in a nutrient solution tank for mass production having a length of 50 m, the transportation means such as a transportation rope and a transportation chain conveyor become large-scale, and the cost of equipment and maintenance and inspection are significantly increased. There was also a problem.

  Further, in order to reliably perform advanced processing such as pre-harvest processing as disclosed in Patent Document 2, it is necessary to completely replace the nutrient solution. That is, it is necessary to replace the nutrient solution containing nitric acid with a nutrient solution from which nitric acid has been completely removed. Moreover, since the light source may be changed, in the mass production apparatus, it is efficient in performing the operation to transfer the cultivation plate to a different hydroponics nutrient solution tank.

  That is, it is necessary to move the cultivation plate from a normal nutrient solution tank to a nutrient solution tank for pre-harvest processing. Therefore, in advanced hydroponics, a transport means for enabling the cultivation plate to move between such nutrient solution tanks is also desired.

  The present invention has been made to solve the above-described problems, and provides a system that can reliably transport a cultivation plate even with a simple transport device.

Hydroponic cultivation system according to the present invention,
A nutrient solution tank having a substantially rectangular planar shape;
A plurality of cultivation plates installed in series on both end walls in the longitudinal direction of the nutrient solution tank;
Conveying means for conveying the plurality of cultivation plates in the longitudinal direction of the nutrient solution tank;
A hydroponics system comprising:
The said cultivation plate has a means combined with an adjacent cultivation plate, It is characterized by the above-mentioned.

Hydroponic cultivation system according to the present invention,
A nutrient solution tank having a substantially rectangular planar shape;
A plurality of cultivation plates installed in series on both end walls in the longitudinal direction of the nutrient solution tank;
Conveying means for conveying the plurality of cultivation plates in the longitudinal direction of the nutrient solution tank;
A hydroponics system comprising:
The conveying means is a conveying means that comes into contact with both side surfaces parallel to the longitudinal direction of the nutrient solution tank of the cultivation plate.

  In recent years, the cultivation of plants such as vegetables using hydroponics has been one of the trends of mass cultivation using a large-scale hydroponics system. With the increase in the length of the nutrient solution tank, the size of the cultivation panel to be used, and the increase in the number of cultivation panels, it has become difficult to carry the cultivation panel with human power. Automation is also desired from the viewpoint of reducing running costs.

  However, there is still no system suitable for conveying cultivation panels. This is because the transport system used at the manufacturing site for machine products and electrical products is merely diverted without taking into account the special characteristics of hydroponics.

  The special characteristics of hydroponics are that the product to be transported is a very delicate plant, the transport system is easily wetted by nutrient solution and water vapor transpiration from the plant, and plants such as vegetables are inexpensive. Yes, from the viewpoint of equipment cost, an expensive conveyance system cannot be used.

  The present invention is a transport system that takes into account the special characteristics of hydroponic cultivation as described above, and is a system that can transport a cultivation plate reliably without damaging plants while having a simple configuration. Since it has a simple configuration, it is possible to reduce equipment costs and maintenance inspection costs. In particular, even if the nutrient solution tank becomes long, the cost of the facility is small, and the system can be installed later in a nutrient solution tank that does not have an automatic transport mechanism.

  Moreover, in the recent advanced hydroponics, the case where a series of cultivation is performed using a plurality of nutrient solution tanks is increasing. In such a case, it is necessary to transfer the cultivation plate between the nutrient solution tanks, but the present invention also considers the transfer of the cultivation plate between the nutrient solution tanks.

It is the (a) top view and (b) side view of the nutrient solution tank and conveyance means which comprise the hydroponic cultivation system which concerns on this invention. It is a perspective view of the plate for cultivation which constitutes the hydroponics system concerning the present invention. It is the (a) top view and (b) side view of the hydroponics system concerning the present invention. It is a top view of the conveyance means which comprises the hydroponic cultivation system which concerns on this invention. It is the (a) perspective view and (b) partial enlarged view of another plate for cultivation which constitutes the hydroponics system concerning the present invention. It is a figure which shows the union state of the plate for cultivation which comprises the hydroponic cultivation system which concerns on Embodiment 2 of this invention. It is (a) top view and (b) side view for demonstrating one usage example of the hydroponic cultivation system which concerns on Embodiment 2 of this invention. It is a side view for demonstrating one usage example of the hydroponic cultivation system which concerns on Embodiment 2 of this invention. It is a side view for demonstrating one usage example of the hydroponic cultivation system which concerns on Embodiment 2 of this invention.

  In the following, the configuration and usage of the hydroponics system according to the present invention will be described with reference to the drawings. The following description discloses a good example relating to the present invention, and the present invention is not limited to the embodiment.

Embodiment 1 FIG.
<Configuration>
FIG. 1: is the (a) top view and (b) side view of the nutrient solution tank and conveyance means which comprise the hydroponic cultivation system of this Embodiment.
Moreover, FIG. 2 is a perspective view of the plate for cultivation which comprises a hydroponic cultivation system.
3 is (a) a top view and (b) a side view when the cultivation plate shown in FIG. 2 is installed in the nutrient solution tank and the conveying means shown in FIG. 1, that is, the present embodiment. It is a figure showing the whole hydroponic cultivation system.

  The hydroponic cultivation system of the present embodiment includes a plurality of cultivation plates that are arranged in series on the nutrient solution tank 1 having a substantially rectangular planar shape and both end walls 1a and 1b in the longitudinal direction of the nutrient solution tank 1. 4 and transport means 2a, 2b, 2c and 2d for transporting a plurality of cultivation plates 4 in the longitudinal direction of the nutrient solution tank 1 are provided. The cultivation plate 4 has means for coupling with the adjacent cultivation plate 4.

  Moreover, conveyance means 2a, 2b, 2c, and 2d are conveyance means which contact | abut on the both sides | surfaces parallel to the longitudinal direction of the nutrient solution tank 1 of the plate 4 for cultivation.

  As shown in FIG. 1 etc., the nutrient solution tank 1 is a container for putting the nutrient solution 1c required for the growth of a plant, the planar shape is substantially rectangular. Along with the recent increase in scale, cases in which the longitudinal direction is about 50 m and the lateral direction is about 2 m are increasing. The present invention is a system suitable for such a long nutrient solution tank, but from the viewpoint of making the drawing easy to see, the nutrient solution tank 1 having a relatively small aspect ratio is shown.

  As shown in FIG. 2, the cultivation plate 4 is provided with a plant insertion opening 4a, which is a through hole for inserting a plant. In addition, when the cultivation plates 4 are arranged, fitting structures 4 b and 4 c are provided for connecting adjacent cultivation plates 4 to each other. In order to join adjacent cultivation plates 4 to each other, for example, a joining jig or a magnetic force may be used, but it is cheaper if the cultivation plate 4 itself has a fitting structure. And the work becomes simple.

  In order to form the fitting structures 4b and 4c at low cost, the cultivation plate 4 may be formed of a material such as resin that can be easily molded. The most common material for cultivation plates is foamed resin such as polystyrene foam. Since the foamed resin contains a large amount of bubbles, the specific gravity is small and it floats on water. On the other hand, it is difficult to make a high-strength one and it is easy to transmit light. As the cultivation plate 4, a foamed resin may be used, but a resin that does not contain bubbles, such as polypropylene, is desirable. In particular, a resin that does not transmit visible light is desirable.

  In this system, the cultivation plate 4 is installed in series on both end walls 1a, 1b in the longitudinal direction of the nutrient solution tank 1, as shown in FIG. Therefore, it is not necessary to float on the nutrient solution, and therefore low specific gravity is not essential as a material for the cultivation plate 4. Moreover, since it has fitting structure 4b, 4c, it must be high intensity | strength. For example, in the case of a large nutrient tank having a longitudinal direction of 50 m, the number of cultivation plates to be used is about 20. The weight per piece is about 2 kg when the plant grows. Therefore, when 20 sheets are connected, the total weight becomes 40 kg. Therefore, since a large load is applied to the fitting structure during conveyance, a high-strength material is desirable.

  As shown in FIG. 3, the conveying means 2 a, 2 b, 2 c, and 2 d abut on both side surfaces parallel to the longitudinal direction of the nutrient solution tank 1 of the cultivation plate 4. The conveying means 2a and 2b are in contact with both side surfaces of the cultivation plate 4 on the rightmost side. Similarly, the conveying means 2c and 2d are in contact with both side surfaces of the cultivation plate 4 on the leftmost side.

As shown in FIG. 4, each of the conveying means 2 a, 2 b, 2 c, and 2 d includes a rotation contact portion 21 that is a roller, a rotation shaft 22 of the rotation contact portion 21, and a rotation contact that supports the rotation shaft 22. Part support part 23, rotation shaft 24 of rotation contact part support part 23, elastic body 26 that urges rotation contact part support part 23 to the cultivation plate side, fixing part 25 that fixes elastic body 26, etc. Has been.
In addition, since the motor and power supply for driving the rotation contact part 21 may be general, description is abbreviate | omitted in the figure.

Since it is such a structure, the plate 4 for cultivation can be clamped firmly from both sides by a pair of conveyance means, and it can convey in the longitudinal direction of a nutrient solution tank. Therefore, even when the cultivation plate 4 is wet by a nutrient solution or the like, the rotational force of the rotation contact portion 21 that is a roller or the like can be reliably transmitted to the cultivation plate 4.
Moreover, the plate 4 for cultivation is installed on the both end walls of the longitudinal direction of a nutrient solution tank, and the incidence of the light to a nutrient solution tank is prevented. For example, when the conveyance mechanism is provided below the cultivation plate 4, the cultivation plate 4 and the both end walls in the longitudinal direction of the nutrient solution tank 1 do not come into contact with each other. It becomes a factor of the generation of algae. When the transporting means 2a, 2b, 2c, and 2d are used, the cultivation plate 4 and both end walls in the longitudinal direction of the nutrient solution tank 1 come into contact with each other, so that no gap for light to enter is generated. Furthermore, if the cultivation plate is made of a material that does not transmit visible light, it is possible to more reliably prevent light from entering the nutrient solution tank.

In addition, this conveyance means 2a, 2b, 2c, 2d has the feature that it is also easy to provide later in the nutrient solution tank which does not have a conveyance means.
In particular, as shown in FIG. 2 and FIG. 3, there is no need to provide a large number of conveying means 2a, 2b, 2c, and 2d because the adjacent cultivation plates 4 are joined, and two pairs as shown in FIG. However, it can be transported sufficiently. Therefore, the installation cost is low and maintenance is easy.

<Usage example>
As shown in FIG. 3, a plurality of cultivation plates 4 are installed in series on both end walls 1 a and 1 b in the longitudinal direction of the nutrient solution tank 1. When installing, in FIG. 3, first, one sheet is installed from the right side. Then, the second sheet is installed by connecting to the first sheet. Move one sheet to the left (in the direction of the white arrow A) by using the transport means 2a and 2b. Then, the second sheet is connected to the second sheet. Such a procedure is repeated to install all the cultivation plates 4 in the nutrient solution tank 1.

  When a plant grows and harvests, it is moved one sheet to the left (in the direction of the white arrow A) by the conveying means 2c and 2d. By this operation, the leftmost cultivation plate 4 moves onto the harvesting table 3. After harvesting on the harvesting table 3, the transport means 2 c and 2 d move one sheet to the left (in the direction of the white arrow A) to harvest the second sheet. By repeating such an operation, it is possible to harvest all the plants on the cultivation plate 4.

<Summary of Embodiment 1>
The present invention fully considers the peculiarities of hydroponics, and is a hydroponic system suitable for transporting a hydroponics cultivation panel.
The special characteristics of hydroponics are that the product to be transported is a very delicate plant, the transport system is easily wetted by nutrient solution and water vapor transpiration from the plant, and plants such as vegetables are inexpensive. Yes, from the viewpoint of equipment cost, an expensive conveyance system cannot be used.

  First, since the adjacent cultivation plates can be connected, the transport system can have a very simple structure. In particular, the merit is extremely large in the case of an extended nutrient solution tank. That is, by connecting a plurality of cultivation plates arranged in series, the contact point between the conveyance system and the cultivation plate can be significantly reduced. As shown in FIGS. 1 and 3, even two pairs of transport means can sufficiently perform the transport function. Thereby, simplification of a conveyance system, cost reduction, and easy maintenance can be realized.

In addition, since the adjacent cultivation plates can be connected, the interval (gap) between the adjacent cultivation plates can be minimized, so that the incidence of light to the nutrient solution tank is cut off, such as aquatic etc. The generation of microalgae can be suppressed. Even during transportation, adjacent cultivation plates are not separated from each other. Therefore, in addition to the stability of transportation, the effect of preventing the incidence of light can be obtained. In particular, if a material that does not transmit visible light is used as the material for the cultivation plate, the effect of blocking the incidence of light can be further ensured.
In addition, by connecting adjacent plates for cultivation, the spacing between the plates for cultivation can be minimized, but by making the structure so as to cover the contact portion of the adjacent plates for cultivation, it is more perfect Can block light. For example, an eaves-like protrusion may be provided at one end of the cultivation plate, and the abutting portion of the adjacent cultivation plate may be covered by the protrusion. Or you may make it the edge part of an adjacent plate for cultivation overlap slightly, and a contact part may be covered.

Next, many more merits are acquired by using the conveyance means which contact | abuts to the both sides parallel to the longitudinal direction of the nutrient solution tank of a cultivation plate as a conveyance means.
First, because the cultivation plate can be firmly clamped from both sides, even when the cultivation plate is wet with nutrient solution, etc., the rotational force of the rotating contact portion such as a roller can be reliably transmitted to the cultivation plate. it can.

Moreover, since the plate for cultivation can be installed on the both end walls of the longitudinal direction of a nutrient solution tank, incidence | injection of the light to a nutrient solution tank can be prevented and generation | occurrence | production of a micro algae can be suppressed.
This transport means also has a feature that it can be easily provided later in a nutrient solution tank that does not have a transport means.

Furthermore, since the rotation contact portion such as a roller is brought into contact with the side surface of the cultivation plate, the roots of the plant are hardly entangled. In a transport mechanism in which a transport belt or the like comes into contact with the bottom surface of the cultivation plate, it is difficult to prevent roots from being entangled with the transport mechanism.
Further, since the conveying means is in a position where it can be visually observed, it is possible to easily recognize an abnormality caused by a leaf entangled and the like, and since it is installed at an easily accessible position, maintenance is easy.

Embodiment 2. FIG.
<Configuration>
In the present embodiment, a cultivation plate having a structure different from that of the first embodiment is used. As shown in FIG. 5, the cultivation plate 5 is different from the cultivation plate 4 of the first embodiment in the fitting structure that is a connecting means. FIG. 6 is a diagram showing only the fitted portion.
As shown in the partially enlarged view of FIG. 5B, the fitting portion 5b of the cultivation plate 5 is L-shaped, the fitting portion 5e is male, and the opening portion of the fitting portion 5c is female. It is a fitting part. The width W of the fitting part 5e is narrower than the width of the opening part of the fitting part 5c. Therefore, a gap is formed in the portion indicated by the white arrow C in FIG. 6, and the fitting portion 5b can be rotated. That is, adjacent cultivation plates 5 can be joined so as to be rotatable in a plane perpendicular to the short direction of the nutrient solution tank.

  In addition, the shape joined so that rotation is not restricted to the shape of FIG. 5, What kind of shape may be sufficient. Any shape that can be rotatably joined by fitting may be used.

<Use Example 1>
The usage example of the plate 5 for cultivation is demonstrated using FIG. 7 and FIG. For example, it has the feature that it is easy to carry out automatic conveyance when transferring the cultivation plate 5 from a normal nutrient solution tank to a nutrient solution tank filled with the nutrient solution before harvesting.

  FIG. 7A is a top view and FIG. 7B is a side view for explaining an example of use of the hydroponic cultivation system, in which the cultivation plate 5 is not installed. FIG. 8 shows a state where the cultivation plate 5 is installed.

Both figures have shown the case where the cultivation plate 5 is automatically conveyed from the nutrient solution tank 1 filled with the normal nutrient solution 1c to the nutrient solution tank 10 filled with the nutrient solution 10c before harvesting. A bridge 6 is provided between the nutrient solution tank 1 and the nutrient solution tank 10. The bridge 6 has a rail shape so as not to damage the roots of the plant to be cultivated.
The bridge 6 is arched as shown in FIG. 7 (b) so that the roots of the plant do not hit the short-side end walls 1d and 10d of the nutrient solution tank. is there.

  As shown in FIG. 8, the cultivation plate 5 passes over the bridge 6 and is conveyed from the nutrient solution tank 1 to the nutrient solution tank 10. The pair of transport means 2a, 2b provided in the nutrient solution tank 1 and the pair of transport means 20a, 20b provided in the nutrient solution tank 10 both convey the cultivation plate 5 in the direction of the white arrow D. To do.

  Since the bridge 6 has an arch shape, when the cultivation plate 5 gets over the bridge 6, the angle changes as shown in FIG. 8. Therefore, joining between the cultivation plates 5 is required to be possible to rotate in a plane perpendicular to the short direction of the nutrient solution tank.

<Usage example 2>
Another example of use of the cultivation plate 5 will be described with reference to FIG. For example, it is a usage example in the case where the cultivation plate 5 is transferred from a normal nutrient solution tank to a nutrient solution tank filled with the nutrient solution before harvesting, as in Use Example 1, but is different from Use Example 1 Is that the nutrient solution tanks are lined up and down. The normal nutrient solution tank 1 is installed below, and the nutrient solution tank 100 filled with the nutrient solution before harvesting is installed above.

  At one end in the longitudinal direction of the nutrient solution tanks 1 and 100, a transfer slope 7 which is a slope for inclining the cultivation plate 5 is provided. The transfer slope 7 is inclined upward toward the outside of the nutrient solution tank 1 or 100 and becomes a rail-like slope so as not to damage the roots of the plants cultivated on the cultivation plate. ing. Similarly to the bridge 6 shown in the first use example, the transfer slope 7 is also provided to prevent plant roots from coming into contact with the end walls 1d and 10d in the short direction of the nutrient solution tanks 1 and 100. .

  A plurality of cultivation plates 5 arranged in series are conveyed to the right by a pair of conveying means 2a, 2b (2a not shown) provided in the nutrient solution tank 1, and the rightmost cultivation plate 5 is transferred. Stops on the slope 7 for use. The rightmost cultivation plate 5 is conveyed onto the transfer slope 7 of the upper nutrient solution tank 100 along the white arrow by a robot arm or an elevator type transfer system. The fitting portions 5b and 5c of the cultivation plate 5 are detached by the transfer system pulling up the slanting plate 5 obliquely upward, and can be easily combined by inserting the slanting top downward.

<Summary of Embodiment 2>
The hydroponic cultivation system of the present embodiment is a system that can further expand the application range of the hydroponic cultivation system shown in the first embodiment. The difference in composition is the fitting part of the cultivation panel, and has a structure that enables rotation between adjacent cultivation panels. Thus, the cultivation panel connected on the bridge | bridging or the slope can be mounted by giving the rotation freedom degree between the cultivation panels.

In the summary of the first embodiment, some special characteristics of hydroponics are listed, but in this embodiment, another special characteristic is considered. That is, it is a request that the roots of plants should not hit the walls of the nutrient solution tank. In the harvesting operation shown in the first embodiment, there is no problem even if the root of the plant hits the wall of the nutrient solution tank. If harvesting is done, roots are basically unnecessary. However, when moving the nutrient solution tank during cultivation and continuing cultivation, it is absolutely necessary to avoid damaging the roots.
The answer to the request is a configuration such as a cultivation panel that fits in a rotatable manner, and a bridge and a slope.

The purpose of transferring the cultivation panel between the nutrient tanks is not limited to pre-harvest processing. For example, it is also effective when reducing production costs. In plant factories, light for photosynthesis is a fluorescent lamp or LD light, and very strong light is required. The electricity cost of this light source accounts for a considerable cost in the overall production cost. In order to use LD light etc. effectively, it is necessary to irradiate from a place as close as possible to the plant, but changing the position of the light source according to the growing plant requires a space in the height direction. Also, a moving mechanism for the light source is necessary. Therefore, it is reasonable to transfer the cultivation plate according to the growth of the plant between the nutrient tanks provided with the light sources having different heights.
If the cultivation plate is transferred between the nutrient solution tanks, it is possible to obtain an appropriate nutrient solution according to the growth, thereby improving the quality of the plant and increasing the yield.

  However, it is very hard work for people to relocate cultivation panels. A large cultivation panel weighs about 2kg including plants and has a panel width of 1.5m.

  Therefore, automation is desired. In the structure shown in this embodiment mode, it can be moved without damaging the roots of delicate plants. In multi-stage cultivation, the cultivation plate comes out to the slope outside the nutrient solution tank, so there is no need to insert a robot arm or the like on the nutrient solution tank, and it is necessary to provide an extra space in the height direction. The space efficiency in the height direction is not deteriorated.

DESCRIPTION OF SYMBOLS 1 Nutrient tank 1a, 1b End wall of longitudinal direction of nutrient tank 1c Nutrient liquid 1d End wall 2a, 2b, 2c, 2d of lateral direction of nutrient tank 21 Means of rotation 21 Rotating contact part 22 Rotating shaft 23 Rotating contact part support part 24 Rotating shaft 25 Fixed part 26 Elastic body 3 Harvesting table 4 Cultivation plate 4a Plant insertion opening 4b, 4c Combined part (coupling means)
5 Cultivation Plate 5a Plant Insertion Opening 5b, 5c Joint (Coupling means)
6 Bridge 10 Pre-harvest nutrient solution tank 10d End wall in the short direction of the pre-harvest nutrient solution tank 10c Pre-harvest nutrient solution 7 Transfer slope 100 Pre-harvest nutrient solution tank

Claims (7)

A nutrient solution tank having a substantially rectangular planar shape;
A plurality of cultivation plates installed in series on both end walls formed along the longitudinal direction of the nutrient solution tank;
Conveying means for conveying the plurality of cultivation plates in the longitudinal direction of the nutrient solution tank;
A hydroponics system comprising:
The hydroponic cultivation system characterized in that the cultivation plate has means for coupling with an adjacent cultivation plate. The means for coupling to the adjacent cultivation plates is means for joining the adjacent cultivation plates so as to be rotatable in a plane perpendicular to the short direction of the nutrient solution tank. The hydroponic cultivation system according to 1. The hydroponic cultivation system according to claim 1 or 2, wherein the means for coupling with the adjacent cultivation plates is a fitting means for coupling the adjacent cultivation plates with each other by fitting. At one end in the longitudinal direction of the nutrient solution tank, a transfer slope that is a slope for inclining the cultivation plate is provided,
The transfer slope is a rail-like slope which is inclined upward toward the outside of the nutrient solution tank and does not damage the roots of the plants cultivated on the cultivation plate. The hydroponic cultivation system according to claim 2. A nutrient solution tank having a substantially rectangular planar shape;
A plurality of cultivation plates installed in series on both end walls in the longitudinal direction of the nutrient solution tank;
Conveying means for conveying the plurality of cultivation plates in the longitudinal direction of the nutrient solution tank;
A hydroponics system comprising:
The hydroponic cultivation system, wherein the conveying means is a conveying means that contacts both side surfaces of the cultivation plate parallel to the longitudinal direction of the nutrient solution tank. The hydroponic cultivation system according to claim 5, wherein the conveying means has a pressure to sandwich the cultivation plate from both side surfaces parallel to the longitudinal direction of the nutrient solution tank of the cultivation plate. The hydroponic cultivation system according to any one of claims 1 to 6, wherein the cultivation plate is made of a material that does not transmit light.