JP2022019281A - Hydroponics plate and hydroponics equipment - Google Patents

Abstract

To provide a hydroponics plate that is hard to bend even if a ventilation hole is provided.SOLUTION: A hydroponic plate 5 is transferred and used in the Y direction according to the growth of a plant, and has a width in the X direction perpendicular to the Y direction. The hydroponic plate 5 comprises a flat plate portion 21 having a plant holding hole 25 and a ventilation hole 27. The ventilation hole 27 is provided with a reinforcing rib 50 that crosses the ventilation hole 27 in the X direction and is connected to the flat plate portion 21.SELECTED DRAWING: Figure 6

Description

The present disclosure relates to a hydroponic cultivation plate for cultivating a plant, and a hydroponic cultivation apparatus using the hydroponic cultivation plate.

In recent years, a hydroponic cultivation device capable of efficiently cultivating plants by controlling the temperature while supplying light and nutrients indoors has been attracting attention. The hydroponic cultivation device does not require the use of soil and enables the production of high-density plants in a narrow indoor space. Further, in the hydroponic cultivation apparatus, the temperature, humidity and the like can be adjusted without being affected by the weather, and it is easy to remove the pollution caused by various germs and pests.

The conventional hydroponic cultivation apparatus mainly includes a hydroponic cultivation plate having a plant holding hole, a hydroponic cultivation tank arranged under the plant holding hole, and a means for transferring the hydroponic cultivation plate. (See Patent Document 1).

In the hydroponic cultivation device disclosed in Patent Document 1, the hydroponic cultivation plates are arranged in multiple stages at intervals in the vertical direction, and a lighting device is provided above each hydroponic cultivation plate. Further, in order to effectively utilize the light of the lighting device, the cultivation area of the hydroponic cultivation device is covered with a film or a plate having a light-reflecting film or a sheet on the inner wall. On the other hand, in order to prevent air from staying in the cultivation area and causing a temperature difference between the hydroponic cultivation plates in each stage, the hydroponic cultivation equipment is provided with ventilation equipment, and the hydroponic cultivation plates in each stage are equipped with ventilation equipment. Ventilation holes that penetrate up and down are provided.

Japanese Unexamined Patent Publication No. 2018-7652

However, if a ventilation hole is formed in the hydroponic cultivation plate in order to increase the vertical aeration amount in the hydroponic cultivation apparatus, the strength of the hydroponic cultivation plate decreases. Further, since the hydroponic cultivation plate used in the conventional hydroponic cultivation device is supported by a plurality of rows of transfer means arranged along a predetermined direction, it is used for hydroponic cultivation in the area between the transfer means. The plate becomes easier to bend. As a result, there are problems that the growth of plants is adversely affected and that the smooth transfer of hydroponic plates becomes difficult.

In view of the above, it is an object of the present disclosure to provide a hydroponic cultivation plate that is hard to bend even if a vent is provided, and a hydroponic cultivation apparatus using the hydroponic cultivation plate.

In order to achieve the above object, the first aspect according to the present disclosure is used by transferring in a first direction according to the growth of a plant, and has a width in a second direction perpendicular to the first direction. A plate for hydroponics having a flat plate portion having a plant holding hole and a vent hole, and a reinforcing rib that crosses the vent hole in the second direction and is connected to the flat plate portion. It is a plate for.

According to the first aspect, the vents formed in the flat plate portion of the hydroponic cultivation plate are provided with vents in the width direction (second direction) perpendicular to the transfer direction (first direction) of the plate. Reinforcing ribs are provided across. Therefore, since the strength of the peripheral portion of the ventilation hole in the hydroponic cultivation plate is increased, it is possible to prevent the hydroponic cultivation plate from bending and bending in the width direction.

In the present disclosure, the "reinforcing rib that crosses the ventilation hole in the second direction" is not only the "reinforcing rib whose crossing direction completely coincides with the second direction" but also the "second direction component in the crossing direction". It shall also include "reinforcing ribs including". In order to suppress the deflection of the hydroponic plate in the width direction (second direction), it is better to have more components in the second direction in the transverse direction of the reinforcing ribs, and in particular, the angle difference between the transverse direction and the second direction is large. The angle difference is preferably 45 ° or less, more preferably 30 ° or less, and further preferably 15 ° or less.

A second aspect according to the present disclosure is a hydroponic plate in which the thickness of the reinforcing ribs is larger than the thickness of the flat plate portion in the first aspect.

According to the second aspect, since the thickness of the reinforcing rib is larger than the thickness of the flat plate portion, the strength of the peripheral portion of the vent hole in the hydroponic cultivation plate is further increased. Therefore, the deflection of the hydroponic plate can be further suppressed.

A third aspect according to the present disclosure is, in the second aspect, the reinforcing rib is a plate for hydroponics including a first standing wall portion extending upward from the upper surface of the flat plate portion.

According to the third aspect, in addition to the same effect as the second aspect, the following effects can be obtained. That is, when a plate connecting structure extending above the upper surface of the flat plate portion is provided at both ends of each plate in the transfer direction in order to connect the hydroponic plates to each other, the structure is passed through the first standing wall portion. It becomes easy to connect the reinforcing ribs. As a result, the deflection of the hydroponic plate can be further suppressed.

A fourth aspect according to the present disclosure is, in the third aspect, a second standing wall extending upward from the upper surface of the flat plate portion and extending in the first direction on the side surface of the first standing wall portion in the second direction. It is a plate for hydroponics to which the parts are connected.

According to the fourth aspect, by connecting the reinforcing rib to the second standing wall portion through the first standing wall portion, the strength of the peripheral portion of the vent hole in the hydroponic cultivation plate is further increased. Further, by connecting the reinforcing ribs to the plate connecting structure through the second standing wall portion and the first standing wall portion, the deflection of the hydroponic cultivation plate can be further suppressed.

In the present disclosure, the "second standing wall portion extending in the first direction" is not only the "second standing wall portion whose extension direction completely coincides with the first direction", but also "partially extends in the first direction". It shall also include "the second standing wall portion" and "the second standing wall portion whose extension direction includes the first direction component". For example, the connection portion of the second standing wall portion with the first standing wall portion extends in the first direction, but the other portion of the second standing wall portion may extend along the peripheral edge of the ventilation hole. Further, when the first standing wall portion, that is, the reinforcing rib extends with an angle difference from the second direction, the second standing wall portion may also extend with an angle difference from the first direction.

A fifth aspect according to the present disclosure is, in the fourth aspect, the second standing wall portion is provided so as to sandwich the vent holes on both sides of the first standing wall portion in the second direction. It is a plate for.

According to the fifth aspect, since the first standing wall portion of the reinforcing rib is sandwiched by the second standing wall portion from both sides in the width direction, the strength of the peripheral portion of the vent hole in the hydroponic cultivation plate is further increased.

A sixth aspect according to the present disclosure is, in any one of the second to fifth aspects, the reinforcing rib includes a third standing wall portion extending downward from the lower surface of the flat plate portion, and the third standing wall portion. A fourth standing wall portion extending downward from the lower surface of the flat plate portion and extending in the first direction is connected to the side surface of the portion in the second direction, and the fourth standing wall portion is the second standing wall portion of the third standing wall portion. It is a plate for hydroponics provided so as to sandwich the vent holes on both sides in two directions.

According to the sixth aspect, in addition to the same effect as the second aspect, the following effects can be obtained. That is, by connecting the reinforcing rib to the fourth standing wall portion through the third standing wall portion, the strength of the peripheral portion of the vent hole in the hydroponic cultivation plate is further increased. Further, since the third standing wall portion of the reinforcing rib is sandwiched by the fourth standing wall portion from both sides in the width direction, the strength of the peripheral portion of the vent hole in the hydroponic cultivation plate is further increased.

In the present disclosure, the "fourth standing wall portion extending in the first direction" is not only the "fourth standing wall portion whose extension direction completely coincides with the first direction", but also "partially extends in the first direction". It shall also include "the fourth standing wall portion" and "the fourth standing wall portion whose extension direction includes the first direction component". For example, the connection portion of the fourth standing wall portion with the third standing wall portion extends in the first direction, but the other portion of the fourth standing wall portion may extend along the peripheral edge of the ventilation hole. Further, when the third standing wall portion, that is, the reinforcing rib extends with an angle difference from the second direction, the fourth standing wall portion may also extend with an angle difference from the first direction.

A seventh aspect according to the present disclosure is a hydroponic cultivation plate according to any one of the first to sixth aspects and a hydroponic cultivation arranged under the plant holding hole in the hydroponic cultivation plate. It is a hydroponic cultivation apparatus including a tank and a transfer means for holding the hydroponic cultivation plate and transferring the hydroponic cultivation plate in the first direction.

According to the seventh aspect, since the hydroponic cultivation plate according to any one of the first to sixth aspects according to the present disclosure is used, the strength of the peripheral portion of the vent hole in the hydroponic cultivation plate is increased. Therefore, to prevent the hydroponic plate from bending and bending in the width direction (second direction) perpendicular to the transfer direction (first direction) in which the transfer means for holding the hydroponic plate is arranged. Can be done.

An eighth aspect according to the present disclosure is, in the seventh aspect, the vent is arranged at a substantially central portion of the hydroponic plate in the second direction, and the transfer means is for hydroponics. A hydroponic cultivation device arranged below both ends of the plate in the second direction.

According to the eighth aspect, even in a configuration in which a load is applied to the central portion in the width direction in which the vent holes are formed in the hydroponic cultivation plate, the deflection of the hydroponic cultivation plate can be suppressed.

According to the present disclosure, it is possible to provide a hydroponic cultivation plate that is hard to bend even if a vent is provided, and a hydroponic cultivation apparatus using the hydroponic cultivation plate.

FIG. 1 is a cross-sectional view in the plate width direction (X direction) of the hydroponic cultivation apparatus according to the embodiment. FIG. 2 is an enlarged view showing a hydroponic cultivation plate used in the hydroponic cultivation apparatus shown in FIG. 1 and its vicinity. FIG. 3 is a cross-sectional view of the plate transfer direction (Y direction) in the hydroponic cultivation apparatus according to the embodiment. FIG. 4 is an enlarged view showing a part of the hydroponic cultivation apparatus shown in FIG. FIG. 5 is a view of the supply pipe of the plant culture solution in the hydroponic cultivation apparatus shown in FIG. 3 as viewed from the side in the Y direction of the hydroponic cultivation apparatus. FIG. 6 is a plan view showing the surface of the hydroponic cultivation plate according to the embodiment. FIG. 7 is a view of the hydroponic cultivation plate shown in FIG. 6 as viewed from the side in the Y direction. FIG. 8 is a view of the hydroponic cultivation plate shown in FIG. 6 as viewed from the side surface in the X direction. FIG. 9A is a diagram showing a first example of a planar configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 9B is a diagram showing a second example of a planar configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 9C is a diagram showing a third example of the planar configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 9D is a diagram showing a fourth example of a planar configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 10 is a diagram showing a fifth example of a planar configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 11A is a diagram showing a first example of a cross-sectional configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 11B is a diagram showing a second example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 11C is a diagram showing a third example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 11D is a diagram showing a fourth example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 12A is a diagram showing a fifth example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 12B is a diagram showing a sixth example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 12C is a diagram showing a seventh example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 12D is a diagram showing an eighth example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 12E is a diagram showing a ninth example of the cross-sectional configuration of the vent holes, the reinforcing ribs, and the standing wall portion provided in the hydroponic cultivation plate according to the embodiment. FIG. 12F is a diagram showing a tenth example of a cross-sectional configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 13A is a diagram showing an eleventh example of a cross-sectional configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment. FIG. 13B is a diagram showing a twelfth example of a cross-sectional configuration of a vent hole, a reinforcing rib, and a standing wall portion provided on the hydroponic cultivation plate according to the embodiment.

(Embodiment)
Hereinafter, one embodiment of the present disclosure will be described in detail with reference to the drawings. The present disclosure is not limited to the embodiments shown below, and various changes can be made without departing from the technical idea of the present disclosure. In addition, since each drawing is for conceptually explaining the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding.

<Overview of hydroponic cultivation equipment>
The hydroponic cultivation device 1 of the present embodiment has a rectangular parallelepiped cultivation area inside thereof, and the hydroponic cultivation device 1 is prevented from being affected by various influences such as weather, outside air temperature, and pests. The upper surface and the side surface of 1 are covered with a plate-like body. The inner wall surface of the plate-like body constitutes a reflective surface for increasing the efficiency of light. Hydroponic cultivation plates 5 are arranged in multiple stages in the vertical direction of the hydroponic cultivation apparatus 1, and each hydroponic cultivation plate 5 is made of a material that efficiently reflects light. This promotes photosynthesis of plants and enables stable plant cultivation.

An intake port and an exhaust port are provided in the lower part and the upper part of the hydroponic cultivation device 1, respectively, and a ventilation hole 27 which is a through hole is provided in each hydroponic cultivation plate 5. Therefore, since an air flow is generated in the cultivation area of the hydroponic cultivation apparatus 1, a temperature difference is less likely to occur between the hydroponic cultivation plates 5 in each stage.

As described above, the hydroponic cultivation device 1 of the present embodiment is mainly a device for cultivating plants indoors, and while supplying nutrients necessary for plant cultivation and light necessary for photosynthesis to plants. , External air (or air-conditioned air) can be taken into the cultivation area from below the hydroponic cultivation device 1, and the temperature inside the device can be made substantially uniform.

<Details of hydroponics equipment>
Hereinafter, the hydroponic cultivation apparatus 1 of the present embodiment will be described in detail with reference to FIGS. 1 to 5. In FIGS. 1 to 4, the plate-like body covering the side surface of the hydroponic cultivation device 1 and the plants held on the hydroponic cultivation plate 5 are not shown. Further, in the following description, the direction in which the hydroponic plate 5 is transferred according to the growth of the plant is referred to as the transfer direction (Y direction), and the direction perpendicular to the transfer direction is referred to as the width direction (X direction). To tell.

In the present embodiment, as an example, two hydroponic cultivation plates 5 are arranged in the width direction in each stage of the hydroponic cultivation apparatus 1. Further, a plurality of (9 in FIG. 3) hydroponic cultivation devices 1 are connected in the transfer direction. Each hydroponic cultivation device 1 is arranged so as to be in a straight line in the Y direction with the directions in the Y direction and the X direction aligned. The dimensions of the hydroponic cultivation apparatus 1 of the present embodiment can be, for example, 1.5 m in the X direction, 14.6 m in the Y direction, and 2.7 m in height.

When the hydroponic cultivation device 1 is used in a single minimum unit, the hydroponic cultivation plate 5 may be fixed and used until the plant cultivation is completed. On the other hand, when a plurality of hydroponic cultivation devices 1 are connected and used as in the present embodiment, the hydroponic cultivation plates 5 of each stage are configured to be movable in the Y direction in each hydroponic cultivation device 1. May be. By sliding the hydroponic plate 5 in the Y direction according to the growing condition of the plant, the cultivation work can be made highly efficient. Further, the culture solution may be configured to be able to flow in and out between the hydroponic cultivation tanks 7 of the hydroponic cultivation devices 1 adjacent to each other in the Y direction. By connecting the hydroponic cultivation tanks 7 between the hydroponic cultivation devices 1, it is possible to collectively control the concentration and temperature of the culture solution. The hydroponic cultivation tank 7 may be connected by extending the hydroponic cultivation tank 7 to a longer length, or the hydroponic cultivation tanks 7 may be connected to each other by piping. In this case, in the hydroponic cultivation devices 1 adjacent to each other in the Y direction, openings corresponding to the shape of the hydroponic cultivation tank 7 and the shape of the connecting pipe may be provided on the side plates facing each other. In this way, when a plurality of hydroponic cultivation devices 1 are arranged in series, the culture solution used in the hydroponic cultivation tank 7 is common, but since the cultivation area is divided for each hydroponic cultivation device 1, the cultivation area is divided. Exhaust and ventilation can be reliably performed in each hydroponic cultivation device 1. In addition, temperature conditions and the like can be set independently for each hydroponic cultivation device 1, whereby different plants can be cultivated between each hydroponic cultivation device 1.

The cultivation area of the hydroponic cultivation device 1 forms a box-shaped space as a whole, and the hydroponic cultivation device 1 is configured by placing other parts in the cultivation area. The cultivation area includes a ceiling plate 3A, four columns 3B arranged at substantially four corners of the cultivation area to support the weight of the hydroponic cultivation device 1, and side plates serving as walls in the transfer direction (Y direction) (not shown). It is composed of and. Each of the four columns 3B is arranged at a predetermined interval, and a ceiling plate 3A and a side plate are attached to the columns 3B. It is preferable that there is no gap through which light leaks at the contact portion between the ceiling plate 3A and the side plate.

The inner wall surface of the ceiling plate 3A and the side plate is a surface that reflects light, whereby light can be reflected and diffused in the cultivation area. The side plate may be held by the support column 3B from the outside of the cultivation area, or may be held by the support column 3B from the inside of the cultivation area. The side plate may be integrated in the height direction of the support column 3B, or may be divided according to the height of each stage of the hydroponic cultivation device 1. The side plates divided at the height of each step are lighter than the ones that are integrated, so that they are easy to handle. Further, the side plate may be a planar member such as a roll curtain having flexibility. If the side plate is a flexible planar member, the weight can be further reduced, so that the opening / closing operation is easy when it becomes necessary to collect the hydroponic cultivation plate 5 from the X-direction side surface of the hydroponic cultivation apparatus 1. It will be possible to do it.

In the present embodiment, the length of the side plate in the height direction is set shorter than the length of the support column 3B, so that only the lower end of the support column 3B abuts on the floor without the side plate contacting the floor. As a result, a slit-shaped opening is formed below the hydroponic cultivation device 1, and the inside and the outside of the cultivation area communicate with each other through the opening. Therefore, external air (or air-conditioned air) can be easily taken into the cultivation area from below the hydroponic cultivation device 1.

Further, in the present embodiment, in order to exhaust the air in the cultivation area to the outside, for example, an exhaust fan 11 is provided at an exhaust port (not shown) provided on the ceiling plate 3A. As a result, an air flow flowing from the bottom to the top can be generated in the cultivation area, and as a result, the environment (temperature, humidity, carbon dioxide concentration, etc.) in the cultivation area can be made uniform. As the exhaust fan 11, various types can be used, and for example, a case fan or the like used in an electromechanical device or the like may be used. The exhaust fan 11 and the exhaust port may be arranged on the side plate as long as they are above the vicinity of the uppermost hydroponics plate 5. Further, the exhaust fan 11 may be directly attached to the exhaust port, or the exhaust fan 11 may be attached to a distance from the exhaust port via a duct or the like.

Inside the hydroponic cultivation apparatus 1, for example, seven shelves 13 are provided at predetermined intervals in the vertical direction. Each shelf 13 includes a plurality of longitudinal beams 13A arranged in the transfer direction (Y direction) and a plurality of lateral beams 13B arranged in the X direction and connecting the longitudinal beams 13A at predetermined intervals. It is a ladder-shaped frame composed of. If the shelves 13 are arranged in multiple stages at predetermined intervals in the cultivation area, the number of cultivated plants can be increased, but depending on the type of plant to be cultivated, the shelves 13 may be arranged in a single stage. When the shelves 13 are arranged in multiple stages, for example, the bottom shelf 13 may be used for raising seedlings, and the other shelves 13 may be used for planting. It should be noted that between the two hydroponic cultivation plates 5 arranged in the width direction in each stage of the hydroponic cultivation apparatus 1, an intermediate portion arranged in the transfer direction (Y direction) and connected to the shelves 13 in each stage. The beam 13C is arranged.

Each shelf 13 of the hydroponic cultivation device 1 mainly has a hydroponic cultivation plate 5 for holding a plant and a plurality of long (gutter-shaped) hydroponics for supplying a culture solution to the plant. A cultivation tank 7, a transfer means 15 that holds the hydroponic cultivation plate 5 and transfers it in the transfer direction (Y direction), and a lighting device 33 that promotes photosynthesis of plants are provided.

The hydroponic plate 5 includes a flat plate portion 21 having a plurality of plant holding holes 25 and a plurality of vent holes 27. At both ends of the hydroponic cultivation plate 5 (flat plate portion 21) in the transfer direction, a plate connecting structure 23 for connecting the hydroponic cultivation plates 5 to each other in the transfer direction is provided. The plate connecting structure 23 extends upward from the upper surface of the flat plate portion 21. The details of the structure of the hydroponic plate 5 will be described later.

The ratio of the area of the hydroponic cultivation plate 5 to the area of the cultivation area seen from the plane direction in the hydroponic cultivation apparatus 1 may be set in the range of, for example, about 50 to 95%, per unit area. The ratio may be set higher in order to increase the cultivation amount. If the area of the hydroponic cultivation plate 5 is increased in order to increase the ratio, the gap between the hydroponic cultivation plate 5 and the side plate of the hydroponic cultivation device 1 becomes smaller, but in the present embodiment, the hydroponic cultivation is performed. Since the ventilation holes 27 are formed in the plate 5, the heat retention in each stage of the hydroponic cultivation device 1 can be alleviated. Further, since the exhaust fan 11 is provided on the ceiling plate 3A, the heat retention in each stage of the hydroponic cultivation apparatus 1 is further alleviated, and it is possible to suppress the occurrence of temperature unevenness between each stage (shelf 13). ..

Further, in order to make the temperature, humidity, carbon dioxide concentration, etc. in the cultivation area of the hydroponic cultivation device 1 uniform, it is preferable to have a large amount of airflow in the cultivation area, but if the wind speed becomes too large, the plant will be affected. Photosynthesis is suppressed due to the stress of carbon dioxide. Therefore, in the hydroponic cultivation device 1 of the present embodiment, the ratio of the openings (vent holes 27 and other openings) to the area of the hydroponic cultivation plate 5 (closed portion excluding the ventilation holes 27) of each stage is, for example. It may be in the range of about 3 to 50%.

The hydroponic cultivation tank 7 is arranged below the plant holding hole 25 in the hydroponic cultivation plate 5. The hydroponic cultivation tank 7 is a long water tank having a substantially U-shaped cross-sectional shape, and may be configured by using, for example, a synthetic resin residential gutter or the like. Since the hydroponic cultivation tank 7 stores or circulates the culture solution that promotes the growth of plants, both ends in the longitudinal direction of the hydroponic cultivation tank 7 are to prevent the culture solution from flowing out to the outside. Is provided with an end wall. Each hydroponic cultivation tank 7 is held on the upper surface of a plurality of lateral beams 13B constituting the shelf 13 so that the plurality of hydroponic cultivation tanks 7 are arranged substantially in parallel along the transfer direction (Y direction). Will be done.

In the present embodiment, each hydroponic cultivation plate 5 and each hydroponic cultivation tank 7 are installed so that one hydroponic cultivation plate 5 straddles a plurality of (for example, four) hydroponic cultivation tanks 7. As a result, the roots of the plants held in the holding holes 25 for each plant of the hydroponic cultivation plate 5 are immersed in the culture solution in the hydroponic cultivation tank 7, and a plurality of plant roots are immersed in one hydroponic cultivation plate 5. Plants can be harvested.

Since the hydroponic cultivation plate 5 and the hydroponic cultivation tank 7 are arranged substantially parallel to the transfer direction (Y direction), when the hydroponic cultivation plate 5 is slid in the transfer direction (Y direction), the said The plant moves along the hydroponic cultivation tank 7 together with the hydroponic cultivation plate 5. The ventilation hole 27 provided in the hydroponic cultivation plate 5 is located above between the adjacent hydroponic cultivation tanks 7, and the positional relationship is such that the hydroponic cultivation plate 5 is transferred in the transfer direction (Y direction). It is maintained even if it slides.

The transfer means 15 is arranged below both ends of the hydroponic cultivation plate 5 in the X direction. The transfer means 15 is, for example, a roller type conveyor. A long rail 31 is provided on the shelf 13 along the transfer direction (Y direction), and the transfer means 15 is attached to the rail 31. The hydroponic cultivation plate 5 can be supported and slid by abutting the roller type conveyor serving as the transfer means 15 from the lower surface side of the hydroponic cultivation plate 5. The rail 41 is fixed to the upper surface of the lateral beam 13B constituting the shelf 13. A pair of roller holding portions 17 are provided on the upper surface of the lateral beam 13B so as to sandwich the rail 41 in the X direction. The roller rotation shaft 16 of the transfer means 15 is held by the bearing 18A of each roller holding portion 17. In the vicinity of the intermediate beam 13C, the roller rotation shaft 16 of the transfer means 15 is held by the bearing 18B provided on the intermediate beam 13C and the bearing 18A of the roller holding portion 17.

The lighting device 33 is provided at the lower part (lower side of the hydroponic cultivation tank 7) of each shelf 13 other than the lowermost stage in the hydroponic cultivation device 1. The lighting device 33 is a lighting device that emits light in a cultivation area and supplies light necessary for photosynthesis of plants. As the light source of the lighting device 33, for example, a long HF type fluorescent tube, a fluorescent tube type LED, or the like may be used. The lighting device 33 is fixed to the lower surface of the longitudinal beam 13A substantially parallel to the X direction on the lower side of the hydroponic cultivation tank 7. Depending on the size and shape of the cultivation area of the hydroponic cultivation device 1, the lighting device 33 may be fixed to the lower surface of the lateral beam 13B substantially parallel to the Y direction.

In the present embodiment, a tank 35 for storing the fertilizer stock solution, a tank 37 for storing the culture solution in which the fertilizer stock solution and water are mixed, and a hydroponic cultivation are provided under the lowermost shelf 13 in the hydroponic cultivation device 1. A pump 39 for circulating the culture solution is provided in the device 1. The culture solution sent out from the pump 39 passes through the main pipe 41 and is located at one end in the Y direction from the lower side of the lowermost shelf 13 to the hydroponic cultivation device 1 (hereinafter, the upstream side hydroponic cultivation device 1). It is transferred to the outer surface in the Y direction of) and supplied to the hydroponic cultivation tank 7 of each stage. The culture solution that has passed through the hydroponic cultivation tank 7 of each stage is the main pipe 41 from the outer surface in the Y direction of the hydroponic cultivation device 1 (hereinafter referred to as the downstream hydroponic cultivation device 1) located at the other end in the Y direction. It is discharged to the tank 37 and collected in the tank 37.

As shown in FIGS. 3 to 5, the main pipe 41 extends vertically along the outer surface of the hydroponic cultivation device 1 on the upstream side in the Y direction, and the hydroponic cultivation tank 7 of each stage (each shelf 13) has a main pipe 41. A branch portion 41a located at a height branches into a horizontally extending sub-pipe 42. Each sub-pipe 42 has a branch portion 43 at a position in the X direction of the hydroponic cultivation tank 7. A connection pipe 47 connected to each hydroponic cultivation tank 7 is provided on the outer surface of the hydroponic cultivation device 1 on the upstream side in the Y direction, and the culture solution is connected to the connection pipe 47 from the branch portion 43 via the hose 45. Is supplied.

Further, as shown in FIG. 5, the main pipe 41 extends vertically along the Y-direction outer surface of the hydroponic cultivation device 1 on the downstream side, and extends on the Y-direction outer surface of the hydroponic cultivation device 1 on the downstream side. , A connection pipe 49 connected to each hydroponic cultivation tank 7 is provided. The culture solution that has passed through the hydroponic cultivation tank 7 of each stage is discharged from the connection pipe 49 to the main pipe 41 via the same configuration (not shown) as the hydroponic cultivation device 1 on the upstream side, and is discharged to the tank 37. Will be collected in. In FIGS. 3 to 5, the culture solution flowing through each pipe or the like is indicated by a broken line arrow.

<Structure of plate for hydroponics>
Hereinafter, the hydroponic cultivation plate 5 of the present embodiment will be described in detail with reference to FIGS. 6 to 8. The hydroponic cultivation plate 5 is a base for plant cultivation by immersing the roots of the plant in the culture solution in the hydroponic cultivation tank 7 while holding the plant.

The hydroponic plate 5 shown in FIG. 6 has a substantially quadrangular shape, but depending on the type of cultivated product, the planting density, etc., the hydroponic plate 5 has a polygonal planar shape such as a triangle or a pentagon. You may. The hydroponic cultivation plate 5 is provided with a plant holding hole 25 formed of through holes for holding plants and a predetermined number of vent holes 27 serving as air passages at predetermined intervals. The dimensions of the hydroponic plate 5 in the X direction and the Y direction are, for example, 600 mm and 450 mm, and the thickness of the flat plate portion 21 may be, for example, 2 mm. The plant holding hole 25 and the vent hole 27 penetrate the flat plate portion 21 of the hydroponic cultivation plate 5 from the front surface to the back surface. The opening diameter of the plant holding hole 25 may be, for example, 23 mm, and the dimensions of the ventilation hole 27 in the X direction and the Y direction may be, for example, 24 mm and 114 mm. The ventilation holes 27 are not limited to those recognized as holes in a single hydroponic plate 5, for example, a semicircular notch is formed in one hydroponic plate 5 to form another water. It also includes those that function as holes when butt-butted against the hydroponic plate 5. That is, it includes a device that functions as a ventilation hole 27 when assembled as a device.

In the hydroponic plate 5, the vents 27 are arranged around the plant holding holes 25. In this way, when air passes through the vents 27, the air easily hits the lower surface of the leaves of the plant held in the plant holding holes 25, and fresh air can be supplied to the leaves, so that the plant can be grown. Be promoted. The distance between the ventilation holes 27 and the plant holding holes 25 depends on the type of plant to be cultivated, but is preferably as small as possible, and may be shorter than the distance between the plant holding holes 25, for example.

A plant is inserted into the plant holding hole 25 together with a substantially sponge-like medium made of, for example, urethane resin, whereby the plant is held by the plant holding hole 25. On the back surface (lower surface) of the hydroponic cultivation plate 5, protrusions 21a are provided along the peripheral edge of the plant holding hole 25 in order to improve the holding power of the plant by the plant holding hole 25. The number of plant holding holes 25 is determined by the number of co-cultivated plants in one hydroponic plate 5. A predetermined number of plant holding holes 25 are provided along the longitudinal direction (that is, the Y direction) of the hydroponic cultivation tank 7 so that the roots of the plants are immersed in the culture solution in the hydroponic cultivation tank 7.

The ventilation holes 27 are air passages between the front surface side and the back surface side of the hydroponic cultivation plate 5. The number of vents 27 is determined by the total volume of the cultivation area of the hydroponic cultivation device 1 and the volume between the shelves 13. A predetermined number of ventilation holes 27 are provided along the area between the adjacent hydroponic cultivation tanks 7.

In the present embodiment, in order to cultivate a large amount of plants, a plurality of hydroponic cultivation plates 5 are used side by side on a hydroponic cultivation tank 7 which is connected and lengthened by a joint or the like. Further, in a state where the hydroponic cultivation plates 5 are butted against each other in the Y direction, a transfer means 15, for example, a roller type conveyor is driven to move the hydroponic cultivation plate 5. As a result, even when a plurality of hydroponic cultivation devices 1 are connected in the Y direction, plants can be taken in and out at two locations, the hydroponic cultivation device 1 on the upstream side and the hydroponic cultivation device 1 on the downstream side. Sex improves. As shown in FIG. 7, a protrusion 21a serving as a guide for the transfer means 15 is provided on the back surface (lower surface) of the hydroponic cultivation plate 5 along the Y direction.

At both ends of the hydroponic cultivation plate 5 in the Y direction, a plate connecting structure 23 for connecting the hydroponic cultivation plates 5 to each other and extending above the upper surface of the flat plate portion 21 is provided. The plate connecting structure 23 has a different shape at both ends of the hydroponic cultivation plate 5 in the Y direction. For example, at one end of the hydroponic plate 5 in the Y direction, the plate connecting structure 23 has an inside corner end portion 23a, and at the other end of the hydroponic cultivation plate 5 in the Y direction, the plate connecting structure 23 has. It has a protruding corner end portion 23b. The inside corner end portion 23a and the outside corner end portion 23b are configured to fit each other. The hydroponic cultivation plates 5 can be connected to each other in the Y direction by the inside corner end portion 23a and the outside corner end portion 23b.

In the hydroponic cultivation plate 5 of the present embodiment, as an example, as shown in FIG. 6, plant holding hole rows in which three plant holding holes 25 are arranged at a predetermined pitch in the Y direction are evenly spaced in the X direction. It is arranged in 4 rows. Between adjacent rows of plant retention holes, each plant retention hole 25 is staggered. As a result, the plant becomes easy to grow, the productivity of the plant is improved, and the workability in the X direction is improved. In the intermediate region between the plant holding hole rows, a vent hole row in which three vent holes 27 are arranged at a predetermined pitch in the Y direction is arranged. That is, three rows of ventilation holes are arranged at equal intervals in the X direction. In this case, the row of vents in the middle is arranged substantially in the center of the hydroponic plate 5 in the X direction. Regarding the plant holding hole rows located near both ends of the hydroponic cultivation plate 5 in the X direction, the hydroponic cultivation plate 5 is located between the hydroponic cultivation plate 5 and the Y direction side plate, or is adjacent to each other in the X direction. The space between them is the vertical path of air.

As one of the features of the hydroponic cultivation plate 5 of the present embodiment, the ventilation holes 27 are provided with reinforcing ribs 50 that cross the ventilation holes 27 in the X direction and are connected to the flat plate portion 27. The width (dimension in the Y direction) of the reinforcing rib 50 may be, for example, 2 mm. The number and positions of the reinforcing ribs 50 provided in each ventilation hole 27 are not particularly limited, but for example, one reinforcing rib 50 may be provided in the center of each ventilation hole 27 in the Y direction. The thickness of the reinforcing rib 50 may be larger than the thickness of the flat plate portion 21.

In order to ensure ventilation, the Y-direction dimension of the reinforcing rib 50 (the total dimension in the Y direction when a plurality of ventilation holes 27 are provided for one ventilation hole 27) is the Y-direction dimension of the ventilation hole 27. It is preferably 1/5 or less, more preferably 1/10 or less, and further preferably 1/20 or less. The dimension of the reinforcing rib 50 in the Y direction may be determined depending on the material of the reinforcing rib 50 (that is, the plate 5 for hydroponics), but when ABS resin or the like is used, it is preferably 4 mm or less, preferably 3 mm. It is more preferably 2 mm or less, and further preferably 2 mm or less. In order to secure the strength, the dimension of the connecting portion of the reinforcing rib 50 with the flat plate portion 21 in the Y direction may be larger than that of the other portion of the reinforcing rib 50. Further, the Y-direction dimension of the portion of the reinforcing rib 50 other than the connection portion with the flat plate portion 21 is preferably 0.5 mm or more, and more preferably 1 mm or more when using, for example, ABS resin. preferable.

The reinforcing rib 50 may include a first standing wall portion 51 extending above the upper surface of the flat plate portion 21. A second standing wall portion 52 extending upward from the upper surface of the flat plate portion 21 and extending in the Y direction may be connected to the side surface of the first standing wall portion 51 in the X direction. The second standing wall portion 52 may be provided so as to sandwich the ventilation holes 27 on both sides of the first standing wall portion 51 in the X direction. In particular, by providing a reinforcing rib 50 including the first standing wall portion 51 and to which the second standing wall portion 52 is connected, the vent hole 27 in the central portion in the X direction, which is the most flexible in the hydroponic cultivation plate 5, is provided in the central portion. It is possible to suppress the bending of the hydroponic cultivation plate 5 in the vicinity. In this case, each second standing wall portion 52 is extended in the Y direction and integrated, and the integrated second standing wall portion 52 is connected to the plate connecting structure 23 at both ends of the hydroponic cultivation plate 5 in the Y direction. You may. As a result, the bending of the hydroponic plate 5 can be further suppressed.

The reinforcing rib 50 may include a third standing wall portion 53 extending below the lower surface of the flat plate portion 21. A fourth standing wall portion 54 extending downward from the lower surface of the flat plate portion 21 and extending in the Y direction may be connected to the side surface of the third standing wall portion 53 in the X direction. The fourth standing wall portion 54 may be provided so as to sandwich the ventilation holes 27 on both sides of the third standing wall portion 53 in the X direction. In this case, each of the fourth standing wall portions 54 is extended in the Y direction and integrated, and the integrated fourth standing wall portion 54 is connected to the plate connecting structure 23 at both ends of the hydroponic cultivation plate 5 in the Y direction. You may. As a result, the bending of the hydroponic plate 5 can be further suppressed.

The heights of the first to fourth standing wall portions 51 to 54 are, for example, 16 mm, 16 mm, 5 mm, and 5 mm, respectively, and the widths (dimensions in the X direction) of the second and fourth standing wall portions 52, 54 are, for example, respectively. It may be 2 mm or 2 mm.

The third standing wall portion 53 and the fourth standing wall portion 54 may be provided for all the reinforcing ribs 50 (that is, all the ventilation holes 27). On the other hand, the first standing wall portion 51 and the second standing wall portion 52 may be selectively provided with respect to the reinforcing rib 50 (that is, the ventilation hole 27) at or near the central portion in the X direction of the hydroponic cultivation plate 5. In this way, in the region from the central portion in the X direction to both ends in the X direction in the hydroponic cultivation plate 5, the peripheral edges of the plant holding holes 25 and the vent holes 27 and their vicinity are on the same plane as the surface of the flat plate portion 1. Located in. As a result, since the region of the hydroponic cultivation plate 5 from the central portion in the X direction to both ends in the X direction has a smooth surface, problems such as seedling planting are less likely to occur, and workability is improved.

By the way, when the seedlings at the initial stage of cultivation are small, the contact between the seedlings is small, so that many seedlings can be grown by the hydroponic cultivation plate 5 having many plant holding holes 25. On the other hand, as the seedlings become larger, the contact between the seedlings increases, so that it becomes necessary to transfer the seedlings to the hydroponic cultivation plate 5 having few plant holding holes 25. At the time of this replanting, the first and second standing wall portions 51 and 52 extending above the upper surface of the flat plate portion 21 are selectively arranged near the center in the X direction in the hydroponic cultivation plate 5. The first and second standing wall portions 51 and 52 can smoothly perform the replanting work without getting in the way. By performing the replanting offline (in a state where the hydroponic cultivation plate 5 is removed from the shelf 13), the influence of connecting a plurality of hydroponic cultivation plates 5 can be avoided.

<Example of plan configuration of vents, reinforcing ribs, and standing walls in a plate for hydroponics>
Hereinafter, a plan configuration example of the ventilation holes 27, the reinforcing ribs 50, and the standing wall portions 51 to 54 in the hydroponic cultivation plate 5 of the present embodiment will be described with reference to FIGS. 9A to D and FIGS. 10.

In the hydroponic cultivation plate 5 shown in FIG. 6, the planar shape of the ventilation holes 27 is not limited to the track shape, but may be, for example, a rectangular shape as shown in FIG. 9A. It may have a circular shape as shown in 9B to D. Alternatively, as shown in FIG. 10, the ventilation hole 27 has a continuous opening shape in the Y direction, and a plurality of reinforcing ribs 50 (first standing wall portion 51 and / or a first wall portion 51 and / or a thirth) that cross the ventilation hole 27 in the X direction. 3 Standing wall portion 53 may be included) may be provided.

Further, as shown in FIGS. 9A, 9B, and 10, the second standing wall portion 52 and / or the fourth standing wall portion 54 may extend in the Y direction perpendicularly to the reinforcing rib 50, and FIG. 9C, FIG. As shown in FIG. 9D, it may be curved and extended along the peripheral edge of the ventilation hole 27. Further, as shown in FIG. 9D, the second standing wall portion 52 and / or the fourth standing wall portion 54 may extend so as to surround the ventilation hole 27.

In the present disclosure, the "reinforcing rib 50 that crosses the ventilation hole 27 in the X direction" is not only the "reinforcing rib 50 whose crossing direction completely coincides with the X direction", but also "the component in the X direction in the crossing direction". Reinforcing rib 50 including "is also included. In order to suppress the deflection of the hydroponic plate 5 in the X direction, it is better that the reinforcing rib 50 has more components in the X direction in the transverse direction, and in particular, the angle difference between the transverse direction and the X direction is 45 ° or less. It is preferable, the angle difference is more preferably 30 ° or less, and further preferably the angle difference is 15 ° or less.

Further, in the present disclosure, the "second standing wall portion 52 extending in the Y direction" is not only the "second standing wall portion 52 whose extension direction completely coincides with the Y direction", but also "a second standing wall portion extending partially in the Y direction". It is also assumed that "2 standing wall portion 52" and "second standing wall portion 52 whose extension direction includes a Y-direction component" are also included. For example, the connection portion of the second standing wall portion 52 with the first standing wall portion 51 extends in the Y direction, but the other portion of the second standing wall portion 52 may extend along the peripheral edge of the ventilation hole 27. Further, when the first standing wall portion 51, that is, the reinforcing rib 50 extends with an angle difference from the X direction, the second standing wall portion 52 may also extend with an angle difference from the Y direction.

Further, in the present disclosure, the "fourth standing wall portion 54 extending in the Y direction" is not only the "fourth standing wall portion 54 whose extension direction completely coincides with the Y direction" but also the "partially extending in the Y direction". It is assumed that "4 standing wall portion 54" and "fourth standing wall portion 54 whose extension direction includes a Y-direction component" are also included. For example, the connection portion of the fourth standing wall portion 54 with the third standing wall portion 53 extends in the Y direction, but the other portion of the fourth standing wall portion 54 may extend along the peripheral edge of the ventilation hole 27. Further, when the third standing wall portion 53, that is, the reinforcing rib 50 extends with an angle difference from the X direction, the fourth standing wall portion 54 may also extend with an angle difference from the Y direction.

<Example of cross-sectional configuration of vents, reinforcing ribs, and standing walls in a plate for hydroponics>
Hereinafter, with reference to FIGS. 11A to 11D, FIGS. 12A to F, and FIGS. 13A and 13B, examples of cross-sectional configurations of the ventilation holes 27, the reinforcing ribs 50, and the standing wall portions 51 to 54 in the hydroponic cultivation plate 5 of the present embodiment will be referred to. explain.

As the simplest configuration, as shown in FIG. 11A, the reinforcing rib 50 may have the same thickness as the flat plate portion 21 of the hydroponic cultivation plate 5.

As shown in FIGS. 11B to 11D, when the reinforcing rib 50 includes the first standing wall portion 51 extending upward from the upper surface of the flat plate portion 21, as shown in FIG. 11C, one of the first standing wall portions 51 in the X direction. The second standing wall portion 52 may be provided only on the side surface, or as shown in FIG. 11D, the second standing wall portion 52 may be provided on both side surfaces of the first standing wall portion 51 in the X direction.

As shown in FIGS. 12A to 12C, when the reinforcing rib 50 includes a first standing wall portion 51 extending upward from the upper surface of the flat plate portion 21 and a third standing wall portion 53 extending downward from the lower surface of the flat plate portion 21. , As shown in FIG. 12B, the second standing wall portion 52 and the fourth standing wall portion 54 may be provided only on one side surface in the X direction of the first standing wall portion 51 and the third standing wall portion 53. Alternatively, as shown in FIG. 12C, the second standing wall portion 52 and the fourth standing wall portion 54 may be provided on both side surfaces of the first standing wall portion 51 and the third standing wall portion 53 in the X direction.

Further, as shown in FIGS. 12D to 12F, the reinforcing rib 50 has a first standing wall portion 51 extending upward from the upper surface of the flat plate portion 21 and a third standing wall portion 53 extending downward from the lower surface of the flat plate portion 21. When included, as shown in FIG. 12D, the second standing wall portion 52 may be provided only on one side surface of the first standing wall portion 51 in the X direction. Alternatively, as shown in FIG. 12E, the fourth standing wall portion 54 may be provided only on one side surface of the third standing wall portion 53 in the X direction. Alternatively, as shown in FIG. 12F, the second standing wall portion 52 is provided only on one side surface of the first standing wall portion 51 in the X direction, and the fourth standing wall portion 54 is provided only on the other side surface of the third standing wall portion 53 in the X direction. You may.

As shown in FIG. 13A, the reinforcing rib 50 may include only the third standing wall portion 53 extending downward from the lower surface of the flat plate portion 21. In this case, the fourth standing wall portion 54 may be provided only on one side surface of the third standing wall portion 53 in the X direction, or the fourth standing wall portion 54 may be provided on both side surfaces of the third standing wall portion 53 in the X direction. May be good.

Further, as shown in FIG. 13B, when the reinforcing rib 50 includes the first standing wall portion 51 extending upward from the upper surface of the flat plate portion 21, the auxiliary rib 50 supports the first standing wall portion 51 from the outside in the X direction of the ventilation hole 27. A portion 55 may be further provided. The auxiliary portion 55 may be provided on both sides of the first standing wall portion 51 in the X direction, or the second standing wall portion 52 may be interposed between the auxiliary portion 55 and the first standing wall portion 51.

Similarly, when the reinforcing rib 50 includes the third standing wall portion 53 extending downward from the lower surface of the flat plate portion 21, an auxiliary portion for supporting the third standing wall portion 53 from the X-direction outer side of the ventilation hole 27 may be further provided. .. The auxiliary portion may be provided on both sides of the third standing wall portion 53 in the X direction, or the fourth standing wall portion 54 may be interposed between the auxiliary portion and the third standing wall portion 53.

<Effect of embodiment>
According to the present embodiment described above, the ventilation holes 27 are formed in the flat plate portion 21 of the hydroponic cultivation plate 5 in the width direction (X direction) perpendicular to the transfer direction (Y direction). A reinforcing rib 50 is provided so as to cross the. Therefore, since the strength of the peripheral portion of the ventilation hole 27 in the hydroponic cultivation plate 5 is increased, it is possible to prevent the hydroponic cultivation plate 5 from bending and bending in the width direction.

Further, in the hydroponic cultivation plate 5 of the present embodiment, when the thickness of the reinforcing rib 50 is larger than the thickness of the flat plate portion 21, the strength of the peripheral portion of the ventilation hole 27 in the hydroponic cultivation plate 5 is further increased. do. Therefore, the deflection of the hydroponic plate 5 can be further suppressed.

Further, in the hydroponic cultivation plate 5 of the present embodiment, when the reinforcing rib 50 includes the first standing wall portion 51 extending upward from the upper surface of the flat plate portion 21, the plate connecting structure 23 is passed through the first standing wall portion 51. It becomes easy to connect the reinforcing ribs 50. Therefore, the deflection of the hydroponic plate 5 can be further suppressed.

When the first standing wall portion 51 is provided, the second standing wall portion 52 extending upward from the upper surface of the flat plate portion 21 and extending in the Y direction may be connected to the side surface of the first standing wall portion 51 in the X direction. By doing so, the reinforcing rib 50 is connected to the second standing wall portion 52 through the first standing wall portion 51, so that the strength of the peripheral portion of the ventilation hole 27 in the hydroponic cultivation plate 5 is further increased. Further, by connecting the reinforcing rib 50 to the plate connecting structure 23 through the second standing wall portion 52 and the first standing wall portion 51, the deflection of the hydroponic cultivation plate 5 can be further suppressed.

When the second standing wall portion 52 is provided, the second standing wall portion 52 may be provided so as to sandwich the ventilation holes 27 on both sides of the first standing wall portion 51 in the X direction. In this way, the first standing wall portion 51 of the reinforcing rib 50 is sandwiched by the second standing wall portions 52 from both sides in the X direction, so that the strength of the peripheral portion of the ventilation hole 27 in the hydroponic cultivation plate 5 is further increased. ..

Further, in the hydroponic cultivation plate 5 of the present embodiment, the reinforcing rib 50 includes a third standing wall portion 53 extending downward from the lower surface of the flat plate portion 21, and a flat plate is formed on the side surface of the third standing wall portion 53 in the X direction. A fourth standing wall portion 54 extending downward from the lower surface of the portion 21 and extending in the Y direction is connected, and the fourth standing wall portion 54 is provided so as to sandwich the ventilation holes 27 on both sides of the third standing wall portion 53 in the X direction. May be done. By doing so, the reinforcing rib 50 is connected to the fourth standing wall portion 54 through the third standing wall portion 53, so that the strength of the peripheral portion of the ventilation hole 27 in the hydroponic cultivation plate 5 is further increased. Further, since the third standing wall portion 53 of the reinforcing rib 50 is sandwiched by the fourth standing wall portion 54 from both sides in the X direction, the strength of the peripheral portion of the ventilation hole 27 in the hydroponic cultivation plate 5 is further increased.

Further, according to the hydroponic cultivation apparatus 1 of the present embodiment, the hydroponic cultivation plate 5 described above and the hydroponic cultivation tank 7 arranged under the plant holding hole 25 in the hydroponic cultivation plate 5 , A transfer means 15 for holding the hydroponic plate 5 and transferring it in the Y direction is provided. Therefore, since the strength of the peripheral portion of the vent hole 27 in the hydroponic cultivation plate 5 increases, water is water in the X direction perpendicular to the Y direction in which the transfer means 15 for holding the hydroponic cultivation plate 5 is arranged. It is possible to prevent the plate 5 for hydroponics from bending and bending.

Further, in the hydroponic cultivation apparatus 1 of the present embodiment, the ventilation holes 27 are arranged in the substantially central portion in the X direction of the hydroponic cultivation plate 5, and the transfer means 15 is in the X direction of the hydroponic cultivation plate 5. It may be placed below both ends. By doing so, even in a configuration in which a load is applied to the central portion of the hydroponic cultivation plate 5 in which the vent holes 27 are formed in the X direction, the deflection of the hydroponic cultivation plate 5 can be suppressed.

(Other embodiments)
In the above embodiment, the roller type conveyor is provided as the transfer means 15 of the hydroponic cultivation plate 5, but instead of this, for example, a belt type conveyor or the like may be provided.

Further, in the above embodiment, the case where the ventilation holes 27 are arranged at the center of the hydroponic cultivation plate 5 in the X direction is illustrated, but the arrangement position of the ventilation holes 27 in the hydroponic cultivation plate 5 is not particularly limited. Further, in the above embodiment, the case where the reinforcing rib 50 crosses the center of the ventilation hole 27 in the Y direction is exemplified, but the arrangement position of the reinforcing rib 50 in the ventilation hole 27 is not particularly limited. Further, in the above embodiment, the reinforcing ribs 50 are provided in all the ventilation holes 27, but for example, the ventilation holes 27 near the end where the plate 5 for hydroponics is less likely to bend, or the passage having a relatively small size. Reinforcing ribs 50 may not be provided in the pores 27 and the like.

Further, the hydroponic cultivation device 1 of the above embodiment may be further provided with a mist sprayer for spraying mist in the cultivation area, a temperature control device capable of arbitrarily adjusting the temperature in the cultivation area, and the like. By using a mist sprayer to change a liquid such as liquid fertilizer, liquefied carbon dioxide gas or an insecticide into mist and spray it, the cultivation efficiency of plants can be further improved. By adjusting the temperature in the cultivation area to a temperature suitable for growing the plant by using the temperature control device, the cultivation efficiency of the plant can be further improved.

Although the embodiments have been described above, it will be understood that various modifications of the embodiments and details are possible without departing from the spirit and scope of the claims. Further, the above embodiments may be appropriately combined or replaced as long as the functions of the subject of the present disclosure are not impaired. Furthermore, the above-mentioned descriptions of "first", "second", ... Are used to distinguish the words and phrases to which these descriptions are given, and also limit the number and order of the words and phrases. is not it.

1 Hydroponic cultivation equipment 5 Hydroponic cultivation plate 7 Hydroponic cultivation tank 15 Transfer means 21 Flat plate part 25 Plant holding hole 27 Vent hole 50 Reinforcing rib 51 1st standing wall part 52 2nd standing wall part 53 3rd standing wall part 54 4th Standing wall

Claims (8)

A plate for hydroponics that is transferred and used in the first direction according to the growth of plants and has a width in the second direction perpendicular to the first direction.
A flat plate with plant holding holes and vents,
It is provided with a reinforcing rib that crosses the ventilation hole in the second direction and is connected to the flat plate portion.
Plate for hydroponics. The thickness of the reinforcing rib is larger than the thickness of the flat plate portion.
The plate for hydroponics according to claim 1. The reinforcing rib includes a first standing wall portion extending above the upper surface of the flat plate portion.
The plate for hydroponics according to claim 2. A second standing wall portion extending upward from the upper surface of the flat plate portion and extending in the first direction is connected to the side surface of the first standing wall portion in the second direction.
The plate for hydroponics according to claim 3. The second standing wall portion is provided so as to sandwich the ventilation holes on both sides of the first standing wall portion in the second direction.
The plate for hydroponics according to claim 4. The reinforcing rib includes a third standing wall portion extending below the lower surface of the flat plate portion.
A fourth standing wall portion extending downward from the lower surface of the flat plate portion and extending in the first direction is connected to the side surface of the third standing wall portion in the second direction.
The fourth standing wall portion is provided so as to sandwich the ventilation holes on both sides of the third standing wall portion in the second direction.
The plate for hydroponics according to any one of claims 2 to 5. The plate for hydroponics according to any one of claims 1 to 6 and the plate for hydroponics.
A hydroponic cultivation tank arranged under the plant holding hole in the hydroponic cultivation plate, and a hydroponic cultivation tank.
A transfer means for holding the hydroponic plate and transferring the plate in the first direction is provided.
Hydroponics equipment. The vent is arranged at a substantially central portion of the hydroponic plate in the second direction.
The transfer means is arranged below both ends of the second direction in the hydroponic plate.
The hydroponic cultivation apparatus according to claim 7.

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