WO2023145759A1

WO2023145759A1 - Hydroponic panel, method for manufacturing hydroponic panel, hydroponic panel system, and hydroponic bed

Info

Publication number: WO2023145759A1
Application number: PCT/JP2023/002197
Authority: WO
Inventors: 秀治鳥井; 素晴藤井; 稔藤田; 正章末岡; 義典本橋
Original assignee: キョーラク株式会社
Priority date: 2022-01-31
Filing date: 2023-01-25
Publication date: 2023-08-03

Abstract

Provided are a hydroponic cultivation panel and a method for manufacturing a hydroponic cultivation panel with which the growth of plants can be promoted while the strength of the panel is ensured.　A hydroponic panel 10 is provided with a plurality of holes 20, wherein: the holes 20 each include an upper-surface-side opening 32 that opens on the upper surface 10a side of the hydroponic cultivation panel 10 into which a plant is inserted, and a lower-surface-side opening 42 that communicates with the upper-surface-side opening 32 and opens on the lower surface 10b side of the hydroponic cultivation panel 10 and has a shape gradually increasing in diameter toward the lower surface 10b side; the inside is hollow; the upper-surface-side openings 32 are each formed by bending a part of the upper surface 10a inward; the lower-surface-side openings 42 are each formed by bending a part of the lower surface 10b inward; and at least the upper surface 10a side is formed of a non-foaming material.

Description

Hydroponics panel, method for manufacturing hydroponic panel, hydroponic panel system, and hydroponic bed

The present invention relates to a hydroponic cultivation panel, a hydroponic cultivation panel manufacturing method, a hydroponic cultivation panel system, and a hydroponic cultivation bed.

(First viewpoint)
BACKGROUND ART Conventionally, panels used for hydroponics of plants have been proposed. For example, Patent Literature 1 discloses a hydroponics panel that is provided with a plurality of fixed planting holes into which seedbed members with plants are inserted and that floats on the surface of the nutrient solution. Each planting hole provided in this hydroponics panel has a recess opening on the upper surface side of the panel and a recessed groove opening on the lower surface side of the panel. The concave groove is concave toward the nutrient solution surface side, and a space surrounded by the nutrient solution and the concave groove is formed around the seedbed member inserted into the planting hole. Air is supplied to the roots of the plant, and the growth of the plant is promoted.

(Second viewpoint)
Patent Literature 1 discloses a hydroponics panel provided with a hole into which a cultivated product, which is constructed by planting a plant in a nursery member, is inserted.

(Third viewpoint)
In Patent Document 1, a plurality of panels are floated in series along the longitudinal direction of the aquarium tray on a nutrient solution of an elongated aquarium tray, plant seedlings are planted at one end of the aquarium tray, and the panels are placed at the other end. A technique is disclosed in which a plant is grown while moving toward the other end and the grown plant is harvested at the other end.

(Fourth viewpoint)
BACKGROUND ART Conventionally, beds have been proposed as storage tanks for storing a nutrient solution used for hydroponics of plants. For example, Patent Literature 2 discloses a plant cultivation unit that includes a resin sheet, a frame that supports the resin sheet in a bent state, and a partition wall. In this plant cultivation unit, a cultivation solution (nutrient solution) or the like is introduced into a rectangular parallelepiped (substantially concave) water storage portion formed by a resin sheet and a partition wall to perform hydroponic cultivation.

JP-A-9-103203 JP 2020-65510 A

(First viewpoint)
However, in the hydroponics panel of Patent Document 1, since the grooves of each planting hole are concavely opened toward the nutrient solution surface side, the inner surface of the grooves has a shape that spreads in the horizontal direction of the panel. there is For this reason, the width between the groove and the upper surface of the panel is small at the portion where the groove is provided, and the thickness of the panel becomes thin.

The present invention has been made in view of such circumstances, and a hydroponic cultivation panel that can promote the growth of plants while ensuring the strength of the panel, and a method for manufacturing such a hydroponic cultivation panel. It provides

(Second viewpoint)
In the panel of Patent Literature 1, the cultivated material is held in the hole by the frictional force between the seedbed member and the inner surface of the hole. However, in such a form, the frictional force is likely to be insufficient, and in that case, there is a risk that the cultivated plants may fall off.

The present invention has been made in view of such circumstances, and provides a hydroponic cultivation panel that can suppress the dropping of cultivated products from holes.

(Third viewpoint)
Multiple panels can be moved simultaneously, for example, by pushing the panel closest to one end of the aquarium tray toward the other end. However, since the panels floating on the nutrient solution tend to move in the vertical direction, there is a risk that when the panel closest to one end of the aquarium tray is pushed toward the other end, one panel may run over the adjacent panel. be.

The present invention has been made in view of such circumstances. To provide a hydroponics panel capable of suppressing riding on.

(Fourth viewpoint)
However, in the plant cultivating unit of Patent Literature 2, the water storage portion is made up of a resin sheet, so the durability of the water storage portion is lacking. Moreover, when cleaning the water storage part, it was necessary to remove the resin sheet from the frame. Furthermore, when performing hydroponics, it was necessary to provide a channel for flowing air, water, etc., as a separate member from the water storage portion. For this reason, maintenance of various members for performing hydroponics was difficult.

The present invention has been made in view of such circumstances, and aims to provide a bed for hydroponic cultivation that is excellent in durability and easy to maintain.

(First viewpoint)
According to the present invention, there is provided a hydroponic cultivation panel provided with a plurality of holes, wherein the holes are an upper surface side opening opening on the upper surface side of the hydroponic cultivation panel into which a plant is inserted; a lower surface side opening that communicates with the upper surface side opening and opens to the lower surface side of the hydroponic cultivation panel and has a shape that gradually expands in diameter toward the lower surface side; The upper surface side opening is formed by bending a portion of the upper surface toward the inside, and the lower surface side opening is formed by bending a portion of the lower surface toward the inside. A hydroponics panel is provided, wherein the upper surface side is formed of a non-foam material.

According to the present invention, there is provided a method for manufacturing a hydroponics panel having a plurality of holes, in which a first molten resin sheet is placed in a first mold and a second molten resin sheet is placed in a second mold. and a welding step of clamping the first mold and the second mold to weld the first molten resin sheet and the second molten resin sheet, wherein the arranging step comprises: The first mold is provided with a projecting portion whose outer surface gradually expands in diameter toward the first mold, and the first molten resin sheet is arranged on the surface including the projecting portion. A method for manufacturing a hydroponic cultivation panel is provided, wherein the hole is provided at a position overlapping the protrusion of the first molten resin sheet.

According to the present invention, it is possible to provide a hydroponic cultivation panel and a method for manufacturing a hydroponic cultivation panel that can promote the growth of plants while ensuring the strength of the panel.

Various embodiments of the present invention are illustrated below. The embodiments shown below can be combined with each other.
Preferably, in the hydroponic cultivation panel described above, the lower surface side opening is formed in multiple stages in such a manner that the inclination angle with respect to the normal direction of the hydroponic cultivation panel gradually decreases toward the lower surface side. incline.
Preferably, in the hydroponic cultivation panel described above, an upper surface side sheet provided on the upper surface side and a lower surface side sheet provided on the lower surface side are attached to each other, and the lower surface side opening is formed by: A portion of the lower surface side sheet is formed by bending toward the inside.
Preferably, in the hydroponic cultivation panel described above, the upper surface side opening is tapered so as to gradually increase in diameter toward the upper surface side.

(Second viewpoint)
According to the present invention, the following inventions are provided.
(1) A hydroponics panel, wherein a hole into which a cultivated product is inserted is provided in the panel so as to penetrate the panel in the vertical direction, and an annular base surface is provided in the hole. and an upper side surface extending from an outer edge of said base surface toward said upper surface, said base surface and said upper side surface being non-parallel.
(2) In the panel according to (1), the hole is provided with a lower side surface extending from an inner edge of the base surface toward the lower surface, and the base surface and the lower side surface is between 20 and 90 degrees, panel.
(3) The panel according to (2), wherein the lower side surface is a tapered surface that is inclined so as to gradually increase in diameter toward the lower surface.
(4) A method for manufacturing a hydroponics panel, comprising an arranging step, a molding step, and a post-processing step, wherein the arranging step includes first and second molds that can be opened and closed with each other in an open state. , placing the parison between first and second molds, the first mold comprising a first rib, the second mold comprising a second rib, the first and second ribs facing each other and the diameter of the outer edge of the tip surface of the first rib is larger than the diameter of the outer edge of the tip surface of the second rib, and in the molding step, the With the parison arranged, the first and second molds are closed and the first and second ribs are butted against each other to weld the facing inner surfaces of the parison to form a welded portion. is formed into a panel shape to form a formed body, and in the post-treatment step, the welded portion is removed to form a hole.
(5) The manufacturing method according to (4), wherein the removal of the welded portion is performed along the outer edge of the portion against which the tip surface of the second rib is pressed.
(6) In the method described in (4) or (5), at least one of the tip end surface of the first rib and the tip end surface of the second rib is provided with an annular annular surface, and the inner side of the annular surface is provided with an annular surface. is provided with a recess.
(7) In the method described in (6), the annular surface is provided on both the tip surface of the first rib and the tip surface of the second rib, and the width of the annular surface of the first rib is greater than the width of the annular surface of the second rib.

In the present invention, an annular base surface and a non-parallel upper side surface are provided in the hole of the panel. When the cultivated product is inserted into the hole in a compressed state, the cultivated product swells in the hole due to the restoring force and is easily held by the base surface in the hole. For this reason, it is suppressed that the cultivated product falls out of the hole.

(Third viewpoint)
According to the present invention, the following inventions are provided.
(1) A panel for hydroponic cultivation, wherein the panel has a left side and a right side, and the left side has a lower protruding portion in which the lower side of the left side protrudes more than the upper side, and the left side of the left side. The right side has a lower protrusion where the lower side of the right side protrudes more than the upper side, and an upper protrusion where the upper side of the right side protrudes more than the lower side. wherein the lower protruding portion of the left side surface and the upper protruding portion of the right side surface are provided at positions facing each other in the left-right direction, and the upper protruding portion of the left side surface and the lower side of the right side surface The panel, wherein the protrusions are provided at positions facing each other in the left-right direction.
(2) In the panel according to (1), the left side includes a pair of the upper protrusions, and on the left side, the lower protrusion is located between the pair of the upper protrusions. and wherein said right side surface comprises a pair of said lower protrusions, and on said right side surface said upper protrusion is disposed between said pair of said lower protrusions.
(3) In the panel according to (1) or (2), the left side surface and the right side surface are each provided with the convex portion at a portion adjacent to the concave portion and the convex portion in the thickness direction. and a flat portion extending over the concave portion, wherein the flat portion on the left side and the flat portion on the right side are provided at positions opposed to each other in the left-right direction.
(4) The panel according to any one of (1) to (3), wherein the panel does not have a point-symmetrical shape.
(5) The panel according to any one of (1) to (3), wherein the panel has a point-symmetrical shape.
(6) A hydroponic panel system configured by arranging a plurality of hydroponic panels in series, the plurality of hydroponic panels comprising a left panel and a right panel adjacent to each other, The left panel and the right panel are panels according to any one of (1) to (5), respectively, and the upper projecting portion of the right side surface of the left panel is the left side surface of the right panel. and the lower protrusion of the right side of the left panel is positioned below the upper protrusion of the left side of the right panel Overlapping, panel system.

When a plurality of panels for hydroponic cultivation of the present invention are arranged in series, the upper protrusion on the right side of the left panel is arranged above the lower protrusion on the left side of the right panel. Overlap such that the lower protrusion on the right side of the left panel is positioned below the upper protrusion on the left side of the right panel. Therefore, relative movement of two adjacent panels in the vertical direction is suppressed. Therefore, when moving a plurality of panels arranged in series by pushing another panel with the panel arranged at the end, it is possible to prevent one panel from running over the adjacent panel.

(Fourth viewpoint)
According to the present invention, a bed for hydroponic cultivation is provided with a substantially concave main body in which liquid is stored, the main body having a hollow interior, and having a flow path through which fluid flows in a part of the interior. provided.

According to the present invention, it is possible to provide a bed for hydroponic cultivation that has excellent durability and is easy to maintain.

Various embodiments of the present invention are illustrated below. The embodiments shown below can be combined with each other.
Preferably, the body portion is provided by a plurality of connection units connected in a first direction, and each of the plurality of connection units includes a substantially rectangular bottom plate portion and a side plate portion rising from an edge of the bottom plate portion. and at least one side in the first direction is opened in the first direction.
Preferably, each of the plurality of connection units has a fitting portion on the open side, and is connected by fitting the fitting portions of two adjacent connection units together.
Preferably, the flow path is provided at a rising tip portion of the side plate portion rising from each of the edges on both sides of the edge in a second direction perpendicular to the first direction, and the flow path is provided along the first direction. The air passage includes an air passage for sending the air, and the air passage has an outlet for blowing out the air flowing in the air passage to the bottom plate portion side.
Preferably, the channel includes a water channel that is provided on the side opposite to the side on which the side plate portion of the bottom plate portion rises and that feeds water, and the water channel has both ends thereof for supplying water to the water channel. It has an inlet for introducing.

1 is a plan view of a hydroponics panel according to a first embodiment of the first aspect of the present invention; FIG. 1 is a side view of a hydroponics panel according to a first embodiment; FIG. FIG. 2 is a cross-sectional view of the hydroponic cultivation panel according to the first embodiment in the long-side direction, and is a cross-sectional view of the III-III cross section in FIG. FIG. 2 is a cross-sectional view of the hydroponic cultivation panel according to the first embodiment in the short side direction, and is a cross-sectional view taken along line IV-IV in FIG. 1; It is sectional drawing which expanded the cross section of the hole of the hydroponics panel which concerns on 1st Embodiment. FIG. 4 is an enlarged cross-sectional view of a hole in the hydroponic cultivation panel according to the first embodiment in which a plant is inserted; 7A and 7B are cross-sectional views showing an arrangement step in the manufacturing process of the hydroponic cultivation panel according to the first embodiment. 8A and 8B are cross-sectional views showing welding steps in the manufacturing process of the hydroponic cultivation panel according to the first embodiment. It is sectional drawing which expanded the cross section of the hole of the hydroponics panel which concerns on 2nd Embodiment. It is sectional drawing which expanded the cross section of the hole of the panel for hydroponic cultivation which concerns on 3rd Embodiment. 11A is a perspective view of a hydroponics panel 310 according to an embodiment of the second aspect of the present invention, and FIG. 11B is an enlarged view of area B in FIG. 11A. 12A is a cross-sectional view passing through the center of the hydroponics panel 310 in FIG. 11A in the short direction, FIG. 12B is an enlarged view of area B in FIG. FIG. 12C is a cross-sectional view corresponding to FIG. 12B showing a state in which the hydroponic cultivation panel 310 with the object 304 inserted therein is floating on the nutrient solution 309; In addition, FIG. 12B shows the structure of the hydroponic cultivation panel 310 in detail, and in other figures, the hydroponic cultivation panel 310 is shown in a more simplified manner than in FIG. 12B. 3 is a sectional view showing a state after first and second resin sheets 305a and 305b are arranged as a parison 305 between a first mold 321 and a second mold 322; FIG. In FIGS. 13 to 20, for convenience of illustration, lines indicating parts deeper than the cross section are omitted. 14A is a cross-sectional view of the first rib 321a and the second rib 322a extracted from FIG. 13, and FIG. 14B is a cross-sectional view of the first rib 321a and the second rib 322a of FIG. 14A butted against each other. . FIG. 15 is a cross-sectional view showing a state after forming a first resin sheet 305a and a second resin sheet 305b with a first mold 321 and a second mold 322 from the state of FIG. 14; 16 is a cross-sectional view showing a state after the first mold 321 and the second mold 322 are closed from the state of FIG. 15; FIG. 17A is a cross-sectional view of a portion near the first rib 321a and the second rib 322a extracted from FIG. 16, and FIG. 17B shows a state in which the first rib 321a and the second rib 322a are removed from FIG. FIG. 17C shows the state after removing the welded portion 307 from FIG. 17B along the outer edge 320h of the portion 320g against which the tip surface 322g of the second rib 322a is pressed. FIGS. 18A to 18C correspond to FIGS. 17A to 17C, respectively, and show states in which the center positions C1 and C2 of the first rib 321a and the second rib 322a are displaced. 19A-19C correspond to FIGS. 17A-17C, respectively, and show a comparative example in which the outer edges 321h, 322h of the first rib 321a and the second rib 322a are aligned. FIGS. 20A, 20B, and 20D correspond to FIGS. 19A to 19C, respectively, and show the comparative example in which the outer edges 321h and 322h of the first rib 321a and the second rib 322a are aligned. This shows a state in which the center positions C1 and C2 of the two ribs 322a are displaced. 20C is an enlarged view of area B in FIG. 20B, and FIG. 20E is an enlarged view of area E in FIG. 20D. Fig. 21A is a perspective view seen from the front side, and Fig. 21B is a perspective view seen from the back side. A hydroponics panel system 413 of the first embodiment of the third aspect of the present invention is shown, FIG. 22A is a perspective view seen from the front side, and FIG. 22B is a perspective view seen from the back side. . 23A and 23B are sectional views taken along lines AA and BB in FIG. 22A, respectively. Fig. 24A shows a perspective view of the hydroponic cultivation panel 410 of the second embodiment of the third aspect of the present invention, and Fig. 24B is a perspective view of the back side. A hydroponics panel system 413 of a second embodiment of the third aspect of the present invention is shown, FIG. 25A is a perspective view seen from the front side, and FIG. 25B is a perspective view seen from the back side. . Fig. 26A shows a perspective view of a hydroponics panel 410 according to a third embodiment of the third aspect of the present invention, and Fig. 26B is a perspective view of the back side. A hydroponics panel system 413 of a third embodiment of the third aspect of the present invention is shown, FIG. 27A is a perspective view seen from the front side, and FIG. 27B is a perspective view seen from the back side. . 28A and 28B are cross-sectional views taken along lines AA and BB in FIG. 27A, respectively. Fig. 29A shows a perspective view of a hydroponic cultivation panel 410 according to a fourth embodiment of the third aspect of the present invention, and Fig. 29B is a perspective view of the back side. 30A is a perspective view of the hydroponic cultivation panel 410 of FIG. 29A as seen diagonally from the lower left, and FIG. 30B is a perspective view of the hydroponic cultivation panel 410 of FIG. 29A as seen diagonally from the lower right. A hydroponics panel system 413 of a fourth embodiment of the third aspect of the present invention is shown, FIG. 31A is a perspective view seen from the front side, and FIG. 31B is a perspective view seen from the back side. . 32A and 32B are sectional views taken along line AA and line BB in FIG. 31A, respectively. 33A and 33B are cross-sectional views of portions corresponding to cross sections AA and BB in FIG. 22 in the hydroponic cultivation panel system 413 of the fifth embodiment of the third aspect. Fig. 34A shows a hydroponic cultivation panel 410 of a sixth embodiment of the third aspect of the present invention, Fig. 34A is a perspective view seen from the front side, Fig. 34B is an enlarged view of region B in Fig. 34A; 34C is a perspective view seen from the back side, and FIG. 34D is an enlarged view of region D in FIG. 34C. 35A is a plan view of two hydroponic cultivation panels 410 of FIG. 34 arranged side by side, and FIG. 35B is an enlarged view of area B in FIG. 35A. The engaging recess 402f, the base recess 402g, and the engaging wall 402h cannot be visually recognized from above, but in FIG. 35, these configurations are illustrated by dotted lines for convenience. FIG. 36A is a cross-sectional view of the same area as FIG. 35B taken through the engaging projection 401f, the base recess 402g, and the engaging recess 402f. FIG. 36B shows a state in which the right panel 412 is shifted obliquely downward with respect to the left panel 411 from the state in FIG. 36A. 36 and 37, for convenience of illustration, the hydroponic cultivation panel 410 is shown solid. FIG. 37A shows the state after the right panel 412 is brought closer to the left panel 411 while being guided by the guide structure 410c from the state of FIG. 36B. FIG. 37B shows a state in which the right panel 412 is shifted upward with respect to the left panel 411 from the state in FIG. 37A. FIG. 37B is a cross-sectional view taken along line AA in FIG. 37B; Fig. 10 is a perspective view of a hydroponic cultivation bed according to an embodiment of the fourth aspect of the present invention; FIG. 4 is a perspective view showing a state in which each connection unit constituting the hydroponic cultivation bed according to the embodiment is separated; It is the perspective view which looked at the intermediate|middle connection unit of the bed for hydroponic cultivation which concerns on embodiment from the upper surface side. It is the perspective view which looked at the intermediate|middle connection unit of the bed for hydroponic cultivation which concerns on embodiment from the lower surface side. FIG. 40 is a cross-sectional view showing a fitting mode of adjacent connection units in the hydroponic cultivation bed according to the embodiment, and is a cross-sectional view taken along the line VV in FIG. 39. FIG. FIG. 4 is a perspective view showing a fitting mode of adjacent connection units in the hydroponic cultivation bed according to the embodiment. FIG. 4 is a perspective view showing a state in which each connection unit is connected by a hose member in the hydroponic cultivation bed according to the embodiment, viewed from the bottom side.

Embodiments of the present invention will be described below. Various features shown in the embodiments shown below can be combined with each other. In addition, the invention is established independently for each feature.

(Embodiment of the first aspect)
A first embodiment of the first aspect of the present invention will be described with reference to FIGS. 1 to 8. FIG. As shown in FIG. 1, the hydroponic cultivation panel 10 according to the present embodiment is a panel-shaped member having a rectangular shape in a plan view, and is used for hydroponic cultivation by being floated on a nutrient solution. The hydroponics panel 10 has a dimension in the short side direction of, for example, 60 cm, a dimension in the long side direction of, for example, 90 cm, and a thickness of, for example, 3 cm. Hereinafter, the short side direction of the hydroponic cultivation panel 10 will be described as the front-rear direction, and the long side direction as the left-right direction.

A plurality of holes 20 are regularly provided at predetermined intervals in the hydroponics panel 10 . These holes 20 penetrate in the vertical direction and open on the upper surface 10a side and the lower surface 10b side of the hydroponics panel 10 (see FIG. 2). A plant to be hydroponically cultivated is inserted into each hole 20 from the upper surface 10 a side of the hydroponic cultivation panel 10 . In addition, handles 12 which are recessed in a concave shape and serve as a grip portion when carrying the hydroponic cultivation panel 10 are provided at four locations near the edges in the front, rear, left, and right directions of the hydroponic cultivation panel 10 . there is

As shown in FIG. 2, the hydroponics panel 10 is formed by bonding two sheet-like members together. These two sheet-like members are not formed by inflating foamed beads such as styrofoam, but are formed of a non-foamed material. Specifically, the hydroponics panel 10 is formed by bonding and welding an upper surface side sheet 30 and a lower surface side sheet 40 each made of hard plastic. By forming the hydroponic cultivation panel 10 from a high-strength material such as hard plastic in this manner, the hydroponic cultivation panel 10 can be washed more easily than a panel formed from expanded polystyrene or the like. . When the hydroponic cultivation panel 10 is used for hydroponics, the hydroponic cultivation panel 10 is floated on the nutrient solution N so that the bottom sheet 40 side is immersed in the nutrient solution N (see FIG. 6).

As shown in FIG. 3, five holes 20 are provided at regular intervals along the left-right direction in the front-rear center of the hydroponics panel 10 . Further, as shown in FIG. 4 , four holes 20 are provided at equal intervals along the front-rear direction on the lateral edge side of the hydroponics panel 10 . Each hole 20 has a substantially V-shaped cross section, and the opening diameter gradually increases toward the lower surface side of the hydroponic cultivation panel 10 . Each hole 20 provided in the hydroponics panel 10 has the same shape and size.

In the hydroponics panel 10, the space between the upper surface side sheet 30 and the lower surface side sheet 40 is hollow. That is, the hydroponic cultivation panel 10 has an annular portion, which is the outer peripheral edge, welded between the upper surface side sheet 30 and the lower surface side sheet 40, and the inside is hollow. A portion of each hole 20 is provided in the upper surface side sheet 30 and the remaining portion is provided in the lower surface side sheet 40 .

Next, the shape of each hole 20 will be described in detail. As shown in FIG. 5, the hole 20 penetrates in the vertical direction, and the upper side opening 32 provided in the upper side sheet 30 and the lower side opening 42 provided in the lower side sheet 40 It is configured by communicating with That is, the upper surface side opening 32 is formed by bending a part of the upper surface side sheet 30 toward the inside of the hollow hydroponic cultivation panel 10 , and the lower surface side opening 42 is formed by bending the lower surface side sheet 40 . A portion thereof is formed by bending toward the inside of the hydroponics panel 10 . The upper surface side opening 32 is opened on the upper surface 10a side of the hydroponics panel 10, and has a tapered shape that gradually increases in diameter toward the upper surface 10a side.

The lower surface side opening 42 is opened on the lower surface 10b side of the hydroponic cultivation panel 10, and is inclined in two stages in a form that gradually expands in diameter from a portion communicating with the upper surface side opening 32 toward the lower surface 10b side. It has a tapered shape. Specifically, the lower surface side opening 42 includes a first tapered portion 42a that continues from the upper surface side opening 32, and a second tapered portion 42b that continues from the first tapered portion 42a and has a gentler inclination angle than the first tapered portion 42a. have. Therefore, the thickness of the hydroponics panel 10 (the width between the first tapered portion 42a and the upper surface 10a) is thin at the portion where the first tapered portion 42a is provided.

In the lower surface side opening 42, the inclination angle θ1 of the first tapered portion 42a with respect to the normal direction of the hydroponics panel 10 (the direction indicated by the dashed arrow in FIG. 5) is within the range of 20 to 90 degrees, preferably It is in the range of 40-90 degrees. The inclination angle θ2 of the second tapered portion 42b with respect to the normal direction of the hydroponics panel 10 is set to be smaller than the inclination angle θ1 of the first tapered portion 42a, and is within the range of 0 to 30 degrees, preferably. It is in the range of 10-20 degrees. The opening diameter D2 of the lower opening 42 is larger than the opening diameter D1 of the upper opening 32 (for example, the opening diameter D1 is 25 mm and the opening diameter D2 is 47 mm).

When hydroponics is performed using the hydroponic cultivation panel 10, plugs 50 such as sponges carrying plants P are fitted into the upper openings 32 of the holes 20, as shown in FIG. That is, the plug 50 is held in the upper opening 32 . The holding force of the plug 50 in the upper opening 32 depends on the thickness of the hydroponic cultivation panel 10 at the portion where the first tapered portion 42a connected to the upper opening 32 is provided. When the plug 50 is fitted in the upper opening 32 , a space S surrounded by the nutrient solution N and the lower opening 42 is formed around the plug 50 . Therefore, air is supplied to the roots of the plant P from the space S, and the growth of the plant P can be promoted.

In addition, in the hydroponics panel 10, the upper surface side sheet 30 is preferably white, and the lower surface side sheet 40 is preferably black. Since the white sheet has a high reflectance of sunlight, sunlight is efficiently reflected by the upper surface side sheet 30, and sufficient sunlight can be supplied to the plants P. On the other hand, since the black sheet has a low transmittance of sunlight, it is possible to prevent sunlight from penetrating through the lower surface side sheet 40 and reaching the nutrient solution N, and algae and the like grow on the nutrient solution N. can be suppressed.

Here, referring back to FIG. 5, the relationship between the widths of the upper opening 32, the first tapered portion 42a, and the second tapered portion 42b in each hole 20 will be described. In the lower surface side opening 42, a relational expression of W1≤W2 is established between the width (horizontal dimension) W1 of the second tapered portion 42b and the width (horizontal dimension) W2 of the first tapered portion 42a. In this case, the ratio of both is 1≤W2/W1≤4, preferably 1.05≤W2/W1≤3. If the ratio of the two is greater than 4, the portion where the first tapered portion 42a is provided becomes large, and the portion where the thickness of the hydroponic cultivation panel 10 is thin increases. strength decreases. Therefore, by setting the ratio of the two to 4 or less, it is possible to secure strength when the stopper 50 is held in the upper opening 32 .

Further, the widths W1 and W2, the vertical width (vertical dimension) W3 of the upper surface side opening 32, and the vertical width (vertical dimension) W4 of the lower surface side opening 42 are 0.2≦( A relational expression of W1+W2)/(W3+W4)≦0.9 holds, preferably 0.3≦(W1+W2)/(W3+W4)≦0.6. If the ratio of W1+W2 and W3+W4 is less than 0.2, the space S surrounded by the nutrient solution N and the bottom side opening 42 becomes narrow, and the growth of the plant P cannot be promoted sufficiently. On the other hand, if the ratio of W1+W2 and W3+W4 is greater than 0.9, the portion where the first tapered portion 42a is provided becomes large, and the strength of holding the plug 50 in the upper opening 32 decreases. By setting the ratio of W1+W2 and W3+W4 within the above range, the growth of the plant P can be promoted and the holding force of the plug 50 in the upper opening 32 can be increased.

In addition, the vertical widths W3 and W4 satisfy a relational expression of 1≤W4/W3≤10, preferably 3≤W4/W3≤7. If the ratio of the two is smaller than 3, the space S surrounded by the nutrient solution N and the lower surface side opening 42 becomes narrow, and the growth of the plant P cannot be promoted sufficiently. On the other hand, if the ratio of the two is greater than 7, the portion where the first tapered portion 42a is provided becomes large, and the strength of holding the plug 50 in the upper opening 32 decreases. By setting the ratio between the two within the above range, it is possible to promote the growth of the plant P and enhance the holding force of the plug 50 in the upper opening 32 .

When the horizontal widths W1, W2 and the vertical widths W3, W4 satisfy the numerical ranges described above, there is a gap between the vertical widths W3, W4 and the vertical width (vertical dimension) W5 of the second tapered portion 42b. , 0.5≦W5/(W3+W4)≦0.9, preferably 0.6≦W5/(W3+W4)≦0.7.

Next, a method for manufacturing the hydroponics panel 10 will be described. The hydroponic cultivation panel 10 according to this embodiment is formed by a resin molding device 60 . The resin molding apparatus 60 includes two resin supply apparatuses arranged opposite to each other, and molds the first molten resin sheet 30a and the second molten resin sheet 40a (see FIG. 7). A first mold 61 and a second mold 62 are arranged outside the first molten resin sheet 30a and the second molten resin sheet 40a molded by the resin molding apparatus 60, respectively.

As shown in FIG. 7A, the first mold 61 and the second mold 62 are arranged to face each other. Molds 63 and 64 are provided on the outer peripheries of the first mold 61 and the second mold 62, respectively. The first mold 61 is provided with a vacuum pump (not shown) that decompresses the space surrounded by the cavity 61 a of the first mold 61 . Similarly, the second mold 62 is also provided with a vacuum pump (not shown) for depressurizing the space enclosed in the cavity 62a of the second mold 62. As shown in FIG. In the process of manufacturing the hydroponic cultivation panel 10 , the upper sheet 30 is molded in the cavity 61 a of the first mold 61 and the lower sheet 40 is molded in the cavity 62 a of the second mold 62 .

In the cavity 61a of the first mold 61, pin heads having substantially the same shape as the openings of the upper surface side openings 32 are provided at positions corresponding to the upper surface side openings 32 of the upper surface side sheet 30 after molding. A first pin (protruding portion) 71 is provided, the pin shaft portion of which is inserted into the cavity 61a. That is, the pin head portion of the first pin 71 has a tapered shape in which the outer surface of the first pin 71 slopes toward the cavity 61 a side of the first mold 61 so as to gradually increase in diameter.

On the other hand, in the cavity 62 a of the second mold 62 , pin heads having substantially the same shape as the openings of the lower openings 42 are provided at positions corresponding to the lower openings 42 of the lower sheet 40 after molding. A second pin (protrusion) 72 is provided which is shaped and has a pin shank inserted into the cavity 62a. That is, the pin head portion of the second pin 72 has a tapered shape in which the outer surface of the second pin 72 is tapered in two stages in a manner that the diameter thereof gradually increases toward the cavity 62a side of the second mold 62 .

In the manufacturing process of the hydroponics panel 10, first, the first molten resin sheet 30a and the second molten resin sheet 40a are suspended between the first mold 61 and the second mold 62 by the resin supply device. Next, as shown in FIG. 7A, the mold 63 is moved toward the first molten resin sheet 30a and brought into contact with the sheet surface of the first molten resin sheet 30a. Similarly, the mold 64 is moved toward the second molten resin sheet 40a and brought into contact with the sheet surface of the second molten resin sheet 40a.

Next, as shown in FIG. 7B, the mold 63 and the first mold 61 are brought relatively close to each other, and the space formed by the first molten resin sheet 30a, the cavity 61a, and the mold 63 is decompressed. Then, the first molten resin sheet 30a is placed in the cavity 61a of the first mold 61 and shaped. Similarly, the mold 64 and the second mold 62 are brought relatively close to each other, and the space formed by the second molten resin sheet 40a, the cavity 62a, and the mold 64 is decompressed to obtain the second molten resin. The sheet 40a is placed in the cavity 62a of the second mold 62 and shaped (placement step).

In the arranging step, the upper surface side opening 32 is formed by the first pin 71 at a position overlapping the first pin 71 in the first molten resin sheet 30a arranged in the cavity 61a. In addition, the second pin 72 forms a lower surface side opening 42 at a position overlapping the second pin 72 in the second molten resin sheet 40a arranged in the cavity 62a. As described above, the upper surface side opening 32 is formed by bending a portion of the first molten resin sheet 30a into a shape and bending toward the inside of the manufactured hydroponic cultivation panel 10, and the lower surface side opening 42 is formed by A portion of the second molten resin sheet 40a is shaped and bent toward the inside of the hydroponic cultivation panel 10 after manufacturing.

Next, as shown in FIG. 8A, a first mold 61 with a first molten resin sheet 30a formed in a cavity 61a and a second mold with a second molten resin sheet 40a formed in a cavity 62a. The dies 62 are brought relatively close to each other, and the dies are clamped until the annular pinch-off portions 61b and 62b come into contact with each other. As a result, the first molten resin sheet 30a and the second molten resin sheet 40a are welded to each other along the pinch-off portions 61b and 62b of the outer periphery, and sandwiched between the first pin 71 and the second pin 72. Some parts are welded together (welding process), and other parts are hollow between the two. After that, the first mold 61 and the second mold 62 are opened, and the first molten resin sheet 30a and the second molten resin sheet 40a welded to each other are taken out.

As shown in FIG. 8B, the first molten resin sheet 30a removed from the first mold 61 and the second mold 62 becomes the upper surface side sheet 30, and the second molten resin sheet 40a becomes the lower surface side sheet 40. In this state, the upper surface side opening 32 formed in the first molten resin sheet 30a and the lower surface side opening 42 formed in the second molten resin sheet 40a are not communicated with each other, and the boundary portion between the two is not communicated. A joint J is formed in which the first molten resin sheet 30a and the second molten resin sheet 40a are welded and joined. Therefore, the holes 20 in the hydroponic cultivation panel 10 are provided by cutting off the joints J and connecting the upper openings 32 and the lower openings 42 . According to the above procedure, the hydroponic cultivation panel 10 according to the present embodiment can be manufactured.

In the hydroponic cultivation panel 10 manufactured as described above, the plants P are held in the upper surface side openings 32 of the holes 20 formed by bending a part of the upper surface side sheet 30 inward. A plug body 50 can be fitted. A lower surface side opening 42 of each hole 20 formed by bending a part of the lower surface side sheet 40 inward has a shape that gradually expands in diameter toward the lower surface 10b side. Therefore, in each hole 20, the width between the lower surface side opening 42 and the upper surface 10a can be increased compared to the case where the inner surface of the opening has a shape that spreads in the horizontal direction, and the hydroponic cultivation panel 10 thickness can be sufficiently secured.

Furthermore, in the hydroponic cultivation panel 10 according to the present embodiment, the upper surface side sheet 30 and the lower surface side sheet 40 are made of hard plastic, which is a non-foaming material, and the inside is hollow, thereby reducing the weight. While achieving the above, it is possible to ensure a higher rigidity than that of foamed polystyrene or the like. As a result, sufficient strength of the hydroponic cultivation panel 10 can be ensured even in the portions where the holes 20 are provided, and the load applied to the holes 20 by the growth of the plant P supported by the plugs 50 is increased. The durability of the hydroponic cultivation panel 10 can be maintained even when the height increases.

Furthermore, in the hydroponic cultivation panel 10 according to the present embodiment, the lower surface side opening 42 of each hole 20 has a shape that gradually expands in diameter toward the lower surface 10b side. A wide space S surrounded by the nutrient solution N and the lower surface side opening 42 can be secured around the plug 50 while floating on the liquid N. Therefore, the roots of the plant P can be supplied with sufficient air, and the growth of the plant P can be effectively promoted. As described above, the hydroponic cultivation panel 10 according to the present embodiment can promote the growth of the plant P while ensuring the strength of the panel.

In addition, in the hydroponic cultivation panel 10, the lower surface side opening 42 of each hole 20 is inclined in multiple stages in such a manner that the inclination angle with respect to the normal line direction of the hydroponic cultivation panel 10 gradually decreases toward the lower surface side. . According to this configuration, the lower surface side opening 42 has a shape in which the diameter gradually expands toward the lower surface 10b side while ensuring the thickness between the upper surface 10a of the hydroponics panel 10 and the first tapered portion 42a. It is possible to provide a specific configuration for

In addition, the hydroponic cultivation panel 10 is formed by bonding together an upper surface side sheet 30 provided on the upper surface 10a side and a lower surface side sheet 40 provided on the lower surface 10b side. A part of 40 is formed by bending inward. According to this configuration, in the hydroponic cultivation panel 10 formed by bonding two sheets together, a wide space S surrounded by the nutrient solution N and the lower surface side opening 42 is secured around the plug 50. can provide a specific configuration of

In addition, in the hydroponic cultivation panel 10, the lower surface side opening 42 is inclined in two stages having a first tapered portion 42a continuing from the upper surface side opening 32 and a second tapered portion 42b continuing from the first tapered portion 42a. It is tapered, and the inclination angle θ1 of the first tapered portion 42a with respect to the normal direction of the hydroponic cultivation panel 10 is 60 degrees. According to this configuration, the first tapered portion for expanding the diameter of the opening toward the lower surface 10b side while ensuring the thickness of the hydroponic cultivation panel 10 in the portion where the first tapered portion 42a is provided. An optimal tilt angle of 42a can be provided.

Further, in the hydroponic cultivation panel 10 , the upper surface side opening 32 of each hole 20 is tapered so that the diameter gradually increases toward the upper surface 10 a of the hydroponic cultivation panel 10 . As a result, since the opening diameter of each hole 20 increases toward the upper surface 10a of the hydroponic cultivation panel 10, the plug 50 carrying the plant P can be easily fitted into the upper surface side opening 32. can.

Further, the method for manufacturing the hydroponic cultivation panel 10 according to the present embodiment is a method for manufacturing the hydroponic cultivation panel 10 provided with a plurality of holes 20, in which the first molten resin sheet 30a is 61 and placing the second molten resin sheet 40a in the second mold 62; and a welding step of welding the resin sheet 40a. By arranging the first molten resin sheet 30a on the surface including the first pin 71 (inside the cavity 61a), the hole 20 is provided at the position overlapping the first pin 71 of the first molten resin sheet 30a.

According to this manufacturing method, the first molten resin sheet 30a and the second molten resin sheet 40a are molded by the resin molding apparatus 60 using a material such as hard plastic, which is superior in strength to styrofoam. The first molten resin sheet 30a and the second molten resin sheet 40a can be shaped along the first mold 61 and the second mold 62 in the placement step. In the arranging step, the position of the first molten resin sheet 30a that overlaps the first pin 71 is shaped along the outer surface of the pin head portion of the first pin 71, and the lower surface side opening is formed into a shape that gradually expands in diameter. Portion 42 is formed as part of hole 20 in hydroponic panel 10 after manufacture.

After that, in the welding step, the outer peripheral edges of the first molten resin sheet 30a and the second molten resin sheet 40a and the space between the upper surface side opening 32 and the lower surface side opening 42 are formed in such a manner that the space between the two is hollow. can be welded. After the welding step, the hydroponic cultivation panel 10 can be manufactured by forming the hole 20 to communicate between the upper surface side opening 32 and the lower surface side opening 42 . For this reason, in the method for manufacturing the hydroponic cultivation panel 10 according to the present embodiment, the hydroponic cultivation panel 10 capable of promoting the growth of the plant P while ensuring the strength of the panel is made of a material having excellent strength. can be manufactured using

(Second Embodiment of First Aspect)
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, in the description of the second embodiment, the description of the same configuration as that of the first embodiment will be omitted or simplified. Further, in FIG. 9, each part of the second embodiment corresponding to each part of the first embodiment is denoted by a reference numeral 100 added to the reference numeral of the first embodiment.

The hydroponics panel according to the second embodiment differs from the first embodiment in the shape of each hole 120 . Specifically, as shown in FIG. 9, the opening diameter D3 of the lower surface side opening 142 of each hole 120 is made larger than the opening diameter D2 of the lower surface side opening 42 of each hole 20 in the first embodiment. (for example, the opening diameter D2 is 47 mm and the opening diameter D3 is 58 mm). The opening diameter D1 of the upper surface side opening 132 of each hole 120 is the same size as the opening diameter D1 of the upper surface side opening 32 of each hole 20 in the first embodiment. Further, in the second embodiment, the inclination angle θ3 of the first tapered portion 142a with respect to the normal line direction of the hydroponic cultivation panel is the same as the inclination of the first tapered portion 42a in the first embodiment for the lower surface side opening 142 of each hole 120. The angle is set to be larger than the angle θ1 (for example, 60 degrees).

In the hydroponic cultivation panel according to the second embodiment, since each hole 120 has the shape described above, compared to the hydroponic cultivation panel 10 according to the first embodiment, The space surrounded by the lower surface side opening 142 can be widened. Therefore, the hydroponic cultivation panel according to the second embodiment can promote the growth of the plant P more effectively while ensuring the strength of the panel.

(Third Embodiment of First Aspect)
Next, a third embodiment of the present invention will be described with reference to FIG. In addition, in the description of the third embodiment, the description of the same configuration as that of the first embodiment will be omitted or simplified. Further, in FIG. 10, each part of the third embodiment corresponding to each part of the first embodiment is denoted by a reference numeral 200 added to the reference numeral of the first embodiment.

The hydroponics panel according to the third embodiment differs from the first embodiment in the shape of each hole 220 . Specifically, as shown in FIG. 10, the opening diameter D4 of the upper surface side opening 232 of each hole 220 is made larger than the opening diameter D1 of the upper surface side opening 32 of each hole 20 in the first embodiment. (for example, the opening diameter D1 is 25 mm and the opening diameter D4 is 43 mm). Furthermore, the opening diameter D5 of the lower surface side opening 242 of each hole 220 is set larger than the opening diameter D2 of the lower surface side opening 42 of each hole 22 in the first embodiment (for example, the opening diameter D2 is 47 mm, and the opening diameter D5 is 47 mm. Aperture D5 is 63 mm).

The hydroponic cultivation panel according to the third embodiment has a larger plug than the hydroponic cultivation panel 10 according to the first embodiment because each hole 220 has the shape described above. Since the body can be fitted into the upper opening 232, various plants can be accommodated. Furthermore, the hydroponic cultivation panel according to the third embodiment can widen the space surrounded by the nutrient solution and the lower surface side opening 242 compared to the hydroponic cultivation panel 10 according to the first embodiment. Therefore, the hydroponic cultivation panel according to the third embodiment can promote the growth of various plants P more effectively while ensuring the strength of the panel.

Although the embodiments of the first aspect of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible without departing from the gist thereof. For example, the size, arrangement, shape, etc. of each hole provided in the hydroponics panel can be changed as appropriate. For example, in each of the above-described embodiments, the lower opening gradually expands in diameter toward the lower surface of the hydroponic panel, but the lower opening is the lower surface of the hydroponic panel. A configuration may be adopted in which the diameter is gradually increased in an arc shape toward the side.

(Embodiment of second aspect)
Embodiments of the second aspect of the present invention will be described below. Various features shown in the embodiments shown below can be combined with each other. In addition, the invention is established independently for each feature.

1. Hydroponics panel 310
A hydroponic cultivation panel 310 according to an embodiment of the second aspect of the present invention shown in FIGS. 11 and 12 is used for hydroponic cultivation by being floated on a nutrient solution 309 as shown in FIG. 12C. . The hydroponics panel 310 is preferably made of a hollow resin molding.

The hydroponics panel 310 has a substantially rectangular shape, with a short side dimension of, for example, 20 to 60 cm, a long side dimension of, for example, 50 to 100 cm, and a thickness of, for example, 20 to 40 mm. Specifically, the dimensions in the short side direction are, for example, 20, 25, 30, 35, 40, 45, 50, 55, and 60 cm, and are within the range between any two of the numerical values exemplified here. good too. Specifically, the dimension in the long side direction is, for example, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100 cm. may be within Specifically, the thickness of the hydroponics panel 310 is, for example, 20, 25, 30, 35, and 40 mm, and may be within a range between any two of the numerical values exemplified here.

A hole 320 into which a cultivated object 304 is inserted is provided in the hydroponic panel 310 so as to penetrate the hydroponic panel 310 in the vertical direction. The cultivated product 304 is preferably constructed by planting a plant P in the plug 350 so that it can be easily held in the hole 320 . The plug 350 is preferably elastically deformable and absorbent, such as sponge. The elastic force of the plug 350 allows the plug 350 to be pressed against the inner surface of the hole 320 to hold the cultivated matter 304 in the hole 320 .

A plurality of holes 320 are provided in the hydroponics panel 310, and the plurality of holes 320 are preferably provided regularly. The interval between adjacent holes 320 is preferably 50 mm or more, for example. This interval is, for example, 50 to 150 mm, specifically, for example, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150 mm, any of the numerical values exemplified here It may range between the two or any more.

The hole 320 has an opening diameter D1 of, for example, 20 to 40 mm on the upper surface 310a side, and an opening diameter D2 of, for example, 30 to 70 mm on the lower surface 310b side. As used herein, "aperture diameter" and "diameter" mean equivalent circle diameters.

D1 is specifically, for example, 20, 25, 30, 35, 40 mm, and may be within a range between any two of the numerical values exemplified here. Specifically, D2 is, for example, 30, 35, 40, 45, 50, 55, 60, 65, 70 mm, and may be within a range between any two of the numerical values exemplified here. D2/D1 is, for example, 1.1 to 3.0, specifically, for example, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7 , 1.8, 1.9, 2.0, 2.5, 3.0, and may be in the range between any two of the values exemplified herein.

Inside the hole 320, an annular base surface 320a and an upper side surface 320i extending from an outer edge 320f of the base surface 320a toward the upper surface 310a are provided. The base surface 320a is provided so as to protrude toward the center of the hole 320 from the lower edge of the upper side surface 320i. Therefore, when the plug 350 is inserted into the hole 320 in a compressed state, the plug 350 swells in the hole due to the restoring force and is easily held by the base surface 320a in the hole 320 . Therefore, the stopper 350 is prevented from falling out of the hole 320 . Note that instead of compressing the plug 350 , part of the plant P may be compressed and inserted into the hole 320 . The following description will be continued by taking as an example the case where the plug body 350 is compressed and inserted into the hole 320 .

The base surface 320a is preferably a flat surface, but may be a curved surface. The base surface 320a is preferably parallel to the top surface 310a of the hydroponics panel 310, but may be non-parallel. The angle of the base surface 320a with respect to the upper surface 310a is, for example, -30 to 30 degrees, specifically for example, -30, -25, -20, -15, -10, -5. , 0, 5, 10, 15, 20, 25, 30 degrees, and may range between any two of the values exemplified herein. The angle when the inner edge 320b of the base surface 320a inclines closer to the upper surface 310a than the outer edge 320f is positive.

The upper side surface 320i is preferably a tapered surface that is inclined so as to gradually increase in diameter toward the upper surface 310a. The upper side surface 320i has an inclination angle γ of, for example, 0 to 30 degrees, preferably 5 to 20 degrees, with respect to the normal to the upper surface 310a. Specifically, the tilt angle γ is, for example, 0, 5, 10, 15, 20, 25, or 30 degrees, and may be within a range between any two of the numerical values exemplified here. The base surface 320a and the upper side surface 320i are non-parallel, and the angle θ between the base surface 320a and the upper side surface 320i is, for example, 90-175 degrees, preferably 95-135 degrees. Specifically, the angle θ is, for example, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175 degrees. may be within a range between any two of the numerical values exemplified in .

The opening diameter of the hole 320 is the smallest at the inner edge 320b of the base surface 320a. The opening diameter D3 at the inner edge 320b is, for example, 15 to 35 mm, specifically, for example, 15, 20, 25, 30, 35 mm, within a range between any two of the numerical values exemplified here. There may be. The diameter D4 of the outer edge 320f of the base surface 320a is, for example, 15.5 to 40 mm, specifically, for example, 15.5, 20, 25, 30, 35, and 40 mm. or within a range between the two. The width of the base surface 320a is, for example, 0.5 to 5 mm, preferably 1 to 3 mm. Specifically, this width is, for example, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 mm. Yes, and may be in a range between any two of the values exemplified here. D1/D3 is, for example, 1.10 to 1.50, specifically, for example, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40 , 1.45, 1.50, and may be in the range between any two of the values exemplified herein. The distance from the upper surface 310a to the base surface 320a is, for example, 3 to 20 mm, specifically, for example, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20 mm, and is exemplified here. It may be in a range between any two of the numbers given.

The hole 320 is preferably provided with a lower side surface 320c extending from the inner edge 320b of the base surface 320a toward the lower surface 310b. The angle α between the base surface 320a and the lower side surface 320c is preferably 20-90 degrees, more preferably 35-75 degrees. Specifically, the angle α is, for example, 20, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 degrees. may be within the range of In this case, since the angle α is a right angle or an acute angle, the protrusion 320d formed by the base surface 320a and the lower side surface 320c can be easily inserted into the plug 350. As shown in FIG. Therefore, the stopper 350 is further prevented from falling out of the hole 320 .

The lower side surface 320c is preferably a tapered surface that is inclined so as to gradually increase in diameter toward the lower surface 310b. Further, it is preferable that a tapered surface 320e having a smaller inclination angle with respect to the normal line of the lower surface 310b than the lower side surface 320c is provided closer to the lower surface 310b than the lower side surface 320c. As a result, the volume of the hole 320 on the lower surface 310b side becomes larger than the inner edge 320b, and the plug 350 is easily supplied with the nutrient solution and air. Assuming that the angles of inclination of the lower side surface 320c and the tapered surface 320e with respect to the normal to the lower surface 310b are β1 and β2, β1-β2 is, for example, 15 to 45 degrees, specifically 15, 20, and 25 degrees. , 30, 35, 40, 45 degrees, and may be in the range between any two of the values exemplified herein. β1 is, for example, 30 to 60 degrees, preferably 40 to 50 degrees. β2 is, for example, 5 to 25 degrees, preferably 10 to 20 degrees.

2. Method for Manufacturing Hydroponic Panel 310 A method for manufacturing the hydroponic panel 310 according to one embodiment of the present invention includes an arrangement step, a molding step, and a post-treatment step. Each step will be described below.

2-1. Arranging Step In the arranging step, as shown in FIG. 13, the first mold 321 and the second mold 322 that can be opened and closed are opened, and the parison 305 is placed between the first mold 321 and the second mold 322 . to place.

The first mold 321 has a first rib 321a, and the second mold 322 has a second rib 322a. The first rib 321a has a shape corresponding to the shape of the portion of the inner surface of the hole 320 closer to the upper surface 310a than the inner edge 320b, and the second rib 322a is closer to the lower surface 310b than the inner edge 320b. It has a shape corresponding to the shape of the part of Therefore, a recess having a shape corresponding to the inner surface of the hole 320 is formed by the first rib 321a and the second rib 322a. The first rib 321a and the second rib 322a are arranged to face each other.

In this embodiment, as shown in FIG. 14, the diameter of the outer edge 321h of the tip surface 321g of the first rib 321a is larger than the diameter of the outer edge 322h of the tip surface 322g of the second rib 322a. By configuring the first rib 321a and the second rib 322a in this manner, the welded portion 307 can be easily removed even when the center positions of the first rib 321a and the second rib 322a are displaced. This effect will be described in more detail in "2-4. Comparison with Comparative Example". The tip surfaces 321g and 322g are preferably flat surfaces, but may be curved surfaces. The tip surfaces 321g and 322g are preferably perpendicular to the opening/closing direction (horizontal direction in FIG. 13) of the first mold 321 and the second mold 322, but may be non-perpendicular.

The first rib 321a is preferably detachably fixed to the first base 321b. The first rib 321a can be fixed by inserting the first mounting protrusion 321c into the first mounting hole 321e of the first base 321b. Since the first ribs 321a are detachably fixed to the first base 321b, the number of the first ribs 321a provided on the first mold 321 is variable. Therefore, the number of holes 320 can be easily changed by changing the number of first ribs 321 a according to the specifications of the hydroponic cultivation panel 310 . The description here is the same for the second mold 322 ("first" should be read as "second" and reference numeral "321" should be read as "322").

The first rib 321a and the second rib 322a can be integrally formed with the first base 321b and the second base 322b so that they cannot be attached and detached. If the second rib 322a is not integrated with the first base 321b and the second base 322b, the center positions of the first rib 321a and the second rib 322a are likely to shift. However, the technical significance of applying the present invention is particularly significant when it is not integrated with the first base 321b and the second base 322b and is detachable.

The parison 305 can be formed by extruding molten resin through an extrusion head (not shown). The parison 305 may be tubular or sheet-shaped. When the parison 305 is sheet-shaped, the parison 305 is composed of, for example, a pair of a first resin sheet 305a and a second resin sheet 305b. In this case, the first resin sheet 305a and the second resin sheet 305b are arranged between the first mold 321 and the second mold 322, as shown in FIG.

The resin constituting the parison 305 is preferably a thermoplastic resin such as polyolefin. Polyolefins include low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymers and mixtures thereof. be done.

2-2. Molding Step In the molding step, as shown in FIGS. 15 and 16, the first mold 321 and the second mold 322 are closed while the parison 305 is placed between the first mold 321 and the second mold 322. By abutting the first rib 321a and the second rib 322a against each other in this state, the opposing inner surfaces of the parison 305 are welded together to form a welded portion 307, and the parison 305 is formed into a panel shape to form a molded body 308. Form. Molding methods include blow molding, vacuum molding, combinations thereof, and the like.

When the parison 305 is composed of the first resin sheet 305a and the second resin sheet 305b, first, as shown in FIG. The second resin sheet 305b is vacuum-sucked by the second mold 322 to shape the second resin sheet 305b into a shape along the shaping surface 322f of the second mold 322 . Next, as shown in FIG. 16, the first mold 321 and the second mold 322 are closed, and the first ribs 321a and the second ribs 322a are butted against each other to form the first resin sheet 305a and the second resin sheet 305a. The resin sheets 305b are welded together to form the welded portion 307, and the molded body 308 is formed by molding the first resin sheet 305a and the second resin sheet 305b into a panel shape.

2-3. Post-Processing Step In the post-processing step, as shown in FIG. 17, the welded portion 307 is removed from the compact 308 to form a hole 320 . The removal of the welded portion 307 may be performed in the first mold 321 and the second mold 322, or may be performed after the first mold 321 and the second mold 322 are opened and the compact 308 is taken out. .

As shown in FIGS. 17B to 17C, the welded portion 307 is removed along the outer edge 320h of the portion 320g against which the tip surface 322g of the second rib 322a is pressed. Thereby, a hole 320 having a shape corresponding to the outer edge 322h of the tip surface 322g is formed. The welded portion 307 can be removed by cutting the welded portion 307 with a cutter or the like. Since the portion 320g is a thin-walled portion in which the parison 305 is crushed by the tip surfaces 321g and 322g, the welded portion 307 can be easily removed by cutting the welded portion 307 along the portion 320g. can do.

In the post-treatment step, various post-treatments such as removal of burrs 305c adhering to molded body 308 are performed to obtain a desired hydroponic cultivation panel 310 as shown in FIGS. 17C and 11 to 12. can.

In the method of the present embodiment, when shaping the first resin sheet 305a and the second resin sheet 305b, the first rib 321a and the second rib 322a first hit the first resin sheet 305a and the second resin sheet 305b. After that, the other surfaces of the shaping surfaces 321f and 322f are brought into contact with the first resin sheet 305a and the second resin sheet 305b. Therefore, the first resin sheet 305a and the second resin sheet 305b are hardly or not stretched at or near the portions where the tip surfaces 321g and 322g of the first ribs 321a and the second ribs 322a are in contact with each other. The part is shaped by being stretched. Therefore, the thickness of the side wall of the hole 320 tends to increase, and the thickness in the vicinity of the mating surfaces of the first rib 321a and the second rib 322a (near the inner edge 320b) tends to increase particularly. In the vicinity of the inner edge 320b, a protruding resin portion 320l (shown in FIG. 12B) protrudes into the hollow portion of the hydroponics panel 310 due to the resin extruded when the first rib 321a and the second rib 322a are butted together. is likely to be formed, and from this point of view as well, the thickness in the vicinity of the inner edge 320b tends to increase. With such a configuration, the strength near the inner edge 320b is increased, and the welding strength between the first resin sheet 305a and the second resin sheet 305b is increased.

2-4. Comparison with Comparative Example In the configuration of the comparative example of the present invention, as shown in FIG. I am doing it. Then, in the post-processing step, as shown in FIGS. 19B to 19C, the welded portion 307 is removed along the outer edge 320h.

Such a configuration does not cause any problem if the center positions C1 and C2 of the first rib 321a and the second rib 322a are on the same straight line. The center positions C1 and C2 of the second rib 322a may be misaligned, and when the center positions C1 and C2 are misaligned, the outer edges 321h and 322h are also misaligned. A part of the outer edge 320h is provided with a portion (non-thin portion) 320j where the parison 305 is not thinned at the end surfaces 321g and 322g. Then, as shown in FIGS. 20D to 20E, when trying to remove the welded portion 307 along the outer edge 320h, it is necessary to remove the non-thin portion 320j. Otherwise, it may take longer than usual to finish the cut surface 320k of the inner surface of the hole 320 so as to be smooth.

In this embodiment, such a problem is solved by making the diameter of the outer edge 321h of the tip surface 321g of the first rib 321a larger than the diameter of the outer edge 322h of the tip surface 322g of the second rib 321a. In such a configuration, as shown in FIG. 18, when the center positions C1 and C2 of the first rib 321a and the second rib 322a are displaced, the outer edge 322h is prevented from protruding outside the outer edge 321h. Therefore, even if the center positions C1 and C2 of the first rib 321a and the second rib 322a are displaced, the entire outer edge 320h becomes a thin portion, so that the welded portion 307 can be easily removed along the outer edge 320h. be.

If the deviation between the center positions C1 and C2 of the first rib 321a and the second rib 322a is larger than the width between the outer edge 321h and the outer edge 322h, the outer edge 322h may protrude from the outer edge 321h. The width between 321h and the outer edge 322h is preferably larger than the maximum value assumed as the shift between the center positions C1 and C2 of the first rib 321a and the second rib 322a. For example, if the deviation between the center positions C1 and C2 of the first rib 321a and the second rib 322a is 1 mm at most, the width between the outer edge 321h and the outer edge 322h may be set to 2 mm, for example. The width between the outer edges 321h and 322h corresponds to the width of the base surface 320a, and the width between the outer edges 321h and 322h is, for example, 0.5 to 5 mm, preferably 1 to 3 mm. Specifically, this width is, for example, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 mm. Yes, and may be in a range between any two of the values exemplified here.

As shown in FIG. 14, it is preferable that at least one of the tip surface 321g of the first rib 321a and the tip surface 322g of the second rib 322a is provided with annular surfaces 321i and 322i. In this case, recessed portions 321j and 322j provided inside the annular surfaces 321i and 322i serve as resin reservoirs 323, and the resin reservoirs 323 can accommodate the resin extruded from the portions where the tip surfaces 321g and 322g are butted against each other.

The annular surfaces 321i and 322i are preferably provided on both the tip surface 321g of the first rib 321a and the tip surface 322g of the second rib 322a. The width of the annular surface 321i is preferably greater than the width of the annular surface 322i. In this case, the diameter of the outer edge 321h of the tip surface 321g of the first rib 321a is made larger than the diameter of the outer edge 322h of the tip surface 322g of the second rib 322a, and the resin reservoir 323 can be easily enlarged.

(Embodiment of the third aspect)
Hereinafter, embodiments of the third aspect of the present invention will be described. Various features shown in the embodiments shown below can be combined with each other. In addition, the invention is established independently for each feature.

1. First Embodiment A first embodiment of the third aspect of the present invention will be described with reference to FIGS. 21 to 23. FIG. The hydroponics panel 410 of the present embodiment is used for hydroponics by being floated on a nutrient solution. The hydroponics panel 410 has a substantially rectangular shape, with a short side dimension of, for example, 20 to 60 cm, a long side dimension of, for example, 50 to 100 cm, and a thickness of, for example, 2 to 4 cm. Specifically, the dimensions in the short side direction are, for example, 20, 25, 30, 35, 40, 45, 50, 55, and 60 cm, and are within the range between any two of the numerical values exemplified here. good too. Specifically, the dimension in the long side direction is, for example, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100 cm. may be within Specifically, the thickness of the hydroponics panel 410 is, for example, 2.0, 2.5, 3.0, 3.5, and 4.0 cm. may be within the range of

Hereinafter, for convenience of explanation, the front, rear, left, and right of the hydroponics panel 410 are defined as shown in FIG. 21A. In this definition, the short side direction of the hydroponic cultivation panel 410 is defined as the horizontal direction, but the front, rear, left, and right may be defined such that the long side direction is the horizontal direction. Further, in the above definition, the front, rear, left, and right are defined by viewing the hydroponic panel 410 from the front side of FIG. may In this case, the front, rear, left, and right in FIG. 21 are switched to the rear, front, right, and left. Further, it is assumed that the hydroponic cultivation panel 410 is moved in the left-right direction during hydroponic cultivation, but it may be moved from left to right or from right to left. In either definition, the front-rear direction is a direction perpendicular to the left-right direction.

A plurality of holes 420 are regularly provided at predetermined intervals in the hydroponics panel 410 . These holes 420 penetrate in the vertical direction and are open on the upper surface 410 a side and the lower surface 410 b side of the hydroponics panel 410 . A plant to be hydroponically grown is inserted into each hole 420 from the upper surface 410 a side of the hydroponic cultivation panel 410 .

The hydroponics panel 410 has a left side 401 and a right side 402 .

The left side surface 401 includes a lower protrusion 401a in which the lower side of the left side 401 protrudes from the upper side, and an upper protrusion 401b in which the upper side of the left side 401 protrudes from the lower side. The right side surface 402 includes a lower protrusion 402a in which the lower side of the right side 402 protrudes from the upper side, and an upper protrusion 402b in which the upper side of the right side 402 protrudes from the lower side.

The lower projecting portion 401a of the left side surface 401 and the upper projecting portion 402b of the right side surface 402 are provided at positions facing each other in the left-right direction. The upper protruding portion 401b of the left side surface 401 and the lower protruding portion 402a of the right side surface 402 are provided at positions facing each other in the left-right direction.

As shown in FIG. 22, the hydroponic panels 410 can be used to configure a hydroponic panel system 413 by arranging a plurality of hydroponic panels 410 in series in the horizontal direction. Since the hydroponic panels 410 do not have a point-symmetrical shape, when a plurality of hydroponic panels 410 are arranged in series to form a hydroponic panel system 413, the direction of the hydroponic panels 410 is incorrect. is suppressed. The number of hydroponic cultivation panels 410 arranged in series in the horizontal direction is, for example, 5 or more, preferably 5-200. Specifically, this number is, for example, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 150, 200. may be within the range.

In the hydroponic panel system 413, if the left side of two hydroponic panels 410 adjacent to each other is the left panel 411 and the right side is the right panel 412, the right side of the left panel 411 is shown in FIG. 23A. 402 overlaps the lower protrusion 402b of the left side 401 of the right panel 412 so as to be positioned above the lower protrusion 401a of the left side 401 of the right panel 412, as shown in FIG. 23B. 402a is positioned below the upper protrusion 401b of the left side 401 of the right panel 412. As shown in FIG.

That is, the left panel 411 and the right panel 412 are arranged such that the right side 402 of the left panel 411 and the left side 401 of the right panel 412 overlap each other at the overlapping portion 403, and as shown in FIG. In the first overlapping portion 403a where the lower protruding portion 401a overlaps, the left panel 411 is on the upper side, and as shown in FIG. side. Therefore, relative movement of the left panel 411 and the right panel 412 in the vertical direction is suppressed. Note that the arrangement of the first overlapping portion 403a and the second overlapping portion 403b can be interchanged as appropriate. For example, a second overlapping portion 403b in which the lower protruding portion 402a and the upper protruding portion 401b overlap is provided at the position of the AA section of FIG. 22A, and the upper protruding portion 402b and the lower A first overlapping portion 403a on which the side projecting portion 401a overlaps may be provided.

Here, two panels on the left side of the three panels in FIG. 22A are the left panel 411 and the right panel 412. , any two adjacent panels can be the left panel 411 and the right panel 412, and the vertical movement of any two adjacent hydroponic cultivation panels 410 is similarly suppressed. Therefore, when moving a plurality of hydroponic cultivation panels 410 arranged in series by pushing the other hydroponic cultivation panel 410 with the hydroponic cultivation panel 410 arranged at the end, one hydroponic cultivation panel 410 is moved. It is possible to prevent the panel 410 from running over the adjacent hydroponics panel 410 . It is preferable that the plurality of hydroponic panels 410 constituting the hydroponic panel system 413 have the same shape. It doesn't have to be.

The lengths OL1 and OL2 of the overlapping portions 403a and 403b in the horizontal direction are, for example, 5 to 50 mm, preferably 10 to 40 mm (18.2 mm in this embodiment). If this length is too short, the suppression of relative movement in the vertical direction between the left panel 411 and the right panel 412 tends to be insufficient. Also, if this length is too long, the horizontal dimension of the hydroponics panel 410 alone may become too large. Specifically, this length is, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 mm, and is within the range between any two of the numerical values exemplified here. good too. When the thickness of the hydroponics panel 410 is T, OL1/T and OL2/T are, for example, 0.1 to 3, preferably 0.2 to 2, and specifically, for example, 0. .1, 0.2, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 and within a range between any two of the numerical values exemplified herein. good too.

The left side 401 has a pair of upper protrusions 401b, and the lower protrusion 401a is arranged between the pair of upper protrusions 401b in the front-rear direction. The right side surface 402 includes a pair of lower protrusions 402a, and the upper protrusion 402b of the right side 402 is arranged between the pair of lower protrusions 402a in the front-rear direction. According to such a configuration, in the hydroponics panel system 413, the first overlapping portion 403a is sandwiched between the pair of second overlapping portions 403b, so that the left panel 411 and the right panel 412 move relative to each other in the front-rear direction. is suppressed.

As shown in FIG. 21, the left side surface 401 has an uneven portion 401c in which a concave portion 401ca and a convex portion 401cb are arranged side by side in the front-rear direction. Preferably, the concave portion 401ca is sandwiched between the pair of convex portions 401cb in the front-rear direction. In addition, the left side surface 401 has a flat portion 401d that is flat in a region that extends over the concave portion 401ca and the convex portion 401cb at a portion adjacent to the uneven portion 401c in the thickness direction. The right side surface 402 includes an uneven portion 402c in which a concave portion 402ca and a convex portion 402cb are arranged side by side in the front-rear direction. Preferably, the convex portion 402cb is sandwiched between the pair of concave portions 401ca in the front-rear direction. In addition, the right side surface 402 includes a flat portion 402d that is flat in a region that spans the concave portion 402ca and the convex portion 402cb at a portion adjacent to the uneven portion 402c in the thickness direction. The flat portion 401d and the flat portion 402d are provided at positions opposed to each other in the left-right direction.

In the hydroponics panel system 413, as shown in FIG. 22A, the convex portion 402cb of the right side surface 402 of the left panel 411 is arranged within the concave portion 401ca of the left side surface 401 of the right panel 412. Further, as shown in FIG. 22B, the flat portion 401d and the flat portion 402d are in contact with each other so that the pressing force can be efficiently transmitted between the left panel 411 and the right panel 412. As shown in FIG. It is preferable that the ratio of the thickness of the uneven portions 401c, 402c and the flat portions 401d, 402d to the thickness of the hydroponics panel 410 is 0.3 to 0.7. The ratio of the thickness of each of the uneven portions 401c, 402c and the flat portions 401d, 402d to the thickness of the hydroponics panel 410 is, for example, 0.3 to 0.7, and specifically, for example, 0.3. , 0.4, 0.5, 0.6, 0.7, and may be in the range between any two of the values exemplified herein.

In addition, even when the flat portion 401d and the flat portion 402d are in contact with each other, the tip 402cb3 of the convex portion 402cb preferably does not contact the bottom surface 401ca3 of the concave portion 401ca as shown in FIG. 23A. Thus, it is preferable that the tip 401cb3 of the convex portion 401cb does not come into contact with the bottom surface 402ca3 of the concave portion 402ca. That is, it is preferable that a gap is provided between the tip 402cb3 and the bottom surface 401ca3, and a gap is also provided between the tip 401cb3 and the bottom surface 402ca3. In this case, the pressing force between the hydroponic cultivation panels 410 is transmitted only by the flat portions 401d and 402d, and it is possible to suppress the pressing force from being transmitted to unintended portions.

As shown in FIG. 21, the recessed portion 401ca is recessed from the flat portion 401d, and the portion below the recessed portion 401ca serves as the lower projecting portion 401a. The convex portion 401cb protrudes from the flat portion 401d, and the convex portion 401cb becomes the upper protruding portion 401b. The recessed portion 402ca is recessed from the flat portion 402d, and the portion below the recessed portion 402ca serves as the lower projecting portion 402a. The convex portion 402cb protrudes from the flat portion 402d, and the convex portion 402cb becomes the upper protruding portion 402b. A side surface 402cb1 of the protrusion 402cb is inclined such that the width of the protrusion 402cb tapers toward the tip. A side surface 401ca1 of the recess 401ca is inclined such that the width of the recess 401ca narrows toward the bottom (bottom in the left-right direction). According to such a configuration, in the hydroponic cultivation panel system 413 shown in FIG.

As shown in FIGS. 21 and 23, the lower surfaces 401b2 and 402b2 of the upper protrusions 401b and 402b are inclined toward the tips of the upper protrusions 401b and 402b so as to approach the upper surface 410a. According to such a configuration, as shown in FIG. Upon collision, the upper projecting portion 402b is guided upward, making it easier to ride on the lower projecting portion 401a. The same effect is exhibited also about the upper protrusion part 401b. In this embodiment, the upper surfaces 401a2 and 402a2 of the lower protruding portions 401a and 402a are horizontal, but are inclined toward the tips of the lower protruding portions 401a and 402a so as to approach the lower surface 410b. good too. In this case, accumulation of water on the upper surfaces 401a2 and 402a2 is suppressed. Also, the inclination angle of the upper surfaces 401a2 and 402a2 is preferably less than the inclination angle of the lower surfaces 401b2 and 402b2.

The hydroponics panel 410 is preferably a resin hollow molding. The hydroponic panel 410 can be manufactured by blow molding or vacuum forming. Thermoplastic resins such as polyolefins are preferable as resins used for manufacturing the hydroponics panel 410. Polyolefins include low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, and ethylene-propylene copolymers. and mixtures thereof. Since the hydroponics panel 410 does not have an undercut shape, it can be easily manufactured by molding using a split mold.

2. Second Embodiment A second embodiment of the third aspect of the present invention will be described with reference to FIGS. 24 and 25. FIG. The hydroponic cultivation panel 410 of the present embodiment is similar to the hydroponic cultivation panel 410 of the first embodiment, and the matters described in the first embodiment are applicable to the present embodiment as long as they do not contradict the spirit thereof. also applies. The following description will focus on the differences.

As shown in FIG. 24, in the hydroponic cultivation panel 410 of this embodiment, the left side surface 401 has two lower protrusions 401a and two upper protrusions 401b, which are arranged alternately. The right side 402 has two lower protrusions 402a and two upper protrusions 402b, which are staggered. Further, the lower projecting portion 401a and the upper projecting portion 402b are arranged to face each other in the left-right direction, and the upper projecting portion 401b and the lower projecting portion 402a are arranged to face each other in the left-right direction. Moreover, the hydroponic cultivation panel 410 of this embodiment has a point-symmetrical shape. Therefore, as shown in FIG. 25, when arranging a plurality of hydroponic panels 410 in series to configure a hydroponic panel system 413, there is no need to worry about the direction of the hydroponic panels 410. There is an advantage.

3. Third Embodiment A third embodiment of the third aspect of the present invention will be described with reference to FIGS. 26 to 28. FIG. The hydroponic cultivation panel 410 of the present embodiment is similar to the hydroponic cultivation panel 410 of the first embodiment, and the matters described in the first embodiment are applicable to the present embodiment as long as they do not contradict the spirit thereof. also applies. The following description will focus on the differences.

The hydroponic cultivation panel 410 in this embodiment is not provided with the flat portions 401d and 402d, and the lengths OL1 and OL2 of the overlapping portions 403a and 403b in the horizontal direction are longer than those in the first embodiment. (36.5 mm in this embodiment). This makes it difficult for the vertical engagement between the left panel 411 and the right panel 412 to be released. Further, the tips of the lower protruding portion 401a and the upper protruding portion 401b are substantially flush, and the tips of the lower protruding portion 402a and the upper protruding portion 402b are also substantially flush.

In this embodiment, as shown in FIG. 26, a stepped portion 401ca2 is provided on the side surface 401ca1 of the concave portion 401ca provided in the lower protruding portion 401a, and the side surface 402cb1 of the protruding portion 402cb provided in the upper protruding portion 402b is provided with a stepped portion 401ca2. A step portion 402cb2 is also provided. Since the stepped portions 401ca2 and 402cb2 are planes perpendicular to the horizontal direction, in the hydroponic cultivation panel system 413 shown in FIG. A pressing force can be efficiently transmitted between the panels 412 .

Even when the stepped portions 401ca2 and 402cb2 are in contact with each other, it is preferable that the tip 402b6 of the upper projecting portion 402b does not contact the bottom surface 401ca3 of the recessed portion 401ca as shown in FIG. 28B. Moreover, it is preferable that the tip 401b6 of the upper protrusion 401b does not contact the bottom surface 402ca3 of the recess 402ca. In other words, it is preferable that a gap is provided between the tip 402b6 and the bottom surface 401ca3, and a gap is also provided between the tip 401b6 and the bottom surface 402ca3. In this case, the pressing force between the hydroponic cultivation panels 410 is transmitted only by the stepped portions 401ca2 and 402cb2, and it is possible to suppress the pressing force from being transmitted to unintended portions.

4. Fourth Embodiment A fourth embodiment of the third aspect of the present invention will be described with reference to FIGS. 29 to 32. FIG. The hydroponic cultivation panel 410 of this embodiment is similar to the hydroponic cultivation panel 410 of the first and third embodiments, and the matters described in the first and third embodiments are not contrary to the gist thereof. So far, this also applies to this embodiment. The following description will focus on the differences.

In the hydroponic cultivation panel 410 of this embodiment, the length of the overlapping portions 403a and 403b in the horizontal direction is shorter than those of the first to third embodiments (11.2 mm in this embodiment). Therefore, the horizontal dimension of the hydroponic cultivation panel 410 alone is small, and the storage space for the hydroponic cultivation panel 410 can be reduced.

In addition, inclined surfaces 401a1, 402a1, 401b1, and 402b1 are provided on the lower protruding portions 401a, 402a and the upper protruding portions 401b, 402b. The contact between the inclined surfaces 401a1 and 402b1 as shown in 32A and the contact between the inclined surfaces 402a1 and 401b1 as shown in FIG. be. The inclined surfaces 401 a 1 , 402 a 1 , 401 b 1 , 402 b 1 are flat surfaces and are preferably provided over 60% or more of the thickness direction of the hydroponics panel 410 . This ratio is, for example, 60 to 100%, specifically, for example, 60, 65, 70, 75, 80, 85, 90, 95, 100%, between any two of the numerical values illustrated here may be within the range of

Furthermore, as shown in FIG. 30A, on the left side surface 401, the parting line PL between the lower protruding portion 401a and the upper protruding portion 401b extends obliquely. The width of the edge 401a5 is narrower than the width of the root edge 401a4. That is, the lower projecting portion 401a is tapered. In addition, as shown in FIG. 30B, on the right side surface 402, the parting line PL between the lower protruding portion 402a and the upper protruding portion 402b extends obliquely. The width of 402b5 is narrower than the width of root edge 402b4. That is, the upper projecting portion 402b is tapered. According to such a configuration, in the hydroponics panel system 413, the leading edge 401a5 easily enters between the pair of lower protrusions 402a, and the leading edge 402b5 easily enters between the pair of upper protrusions 401b. Therefore, when configuring the hydroponic panel system 413, it becomes easy to engage the hydroponic panels 410 with each other.

5. Fifth Embodiment A fifth embodiment of the third aspect of the present invention will be described with reference to FIG. The hydroponic cultivation panel 410 of the present embodiment is similar to the hydroponic cultivation panel 410 of the first embodiment, and the matters described in the first embodiment are applicable to the present embodiment as long as they do not contradict the spirit thereof. also applies. The following description will focus on the differences.

In this embodiment, engaging portions 401a3, 402a3, 401b3, 402b3 are provided on the lower protruding portions 401a, 402a and the upper protruding portions 401b, 402b of the hydroponics panel 410, respectively. In the first overlapping portion 403a, the engaging portion 402b3 and the engaging portion 401a3 engage in the horizontal direction, and in the second overlapping portion 403b, the engaging portion 402a3 and the engaging portion 401b3 engage in the horizontal direction. According to this configuration, tensile force can be efficiently transmitted between the left panel 411 and the right panel 412 in the hydroponics panel system 413 . Therefore, by pulling the hydroponic panel 410 at the end of the hydroponic panel system 413, the plurality of hydroponic panels 410 included in the hydroponic panel system 413 can be moved simultaneously.

6. Sixth Embodiment A sixth embodiment of the third aspect of the present invention will be described with reference to FIGS. 34 to 38. FIG. The hydroponic cultivation panel 410 of the present embodiment has a shape in which the hydroponic cultivation panel 410 of the first embodiment is provided with a tensile force transmission structure as described in the fifth embodiment. Therefore, the matters described in the first embodiment also apply to this embodiment as long as they do not contradict the spirit of the first embodiment. The following description will focus on the differences.

In the present embodiment, the engaging projection 401f provided on the left side surface 401 is accommodated in the engaging recessed portion 402f provided on the right side surface 402, so that the two adjacent hydroponic cultivation panels 410 are arranged on the left and right sides. are directionally engaged with each other to allow transmission of tensile forces.

As shown in FIG. 34B, the engaging projection 401f is provided on the upper surface of the lower projecting portion 401a of the left side surface 401. As shown in FIG. The engagement protrusion 401f is arranged in the recess 401ca. That is, the engaging protrusion 401f is arranged between the pair of upper protrusions 401b. As shown in FIG. 34D, the upper protrusion 402b of the right side surface 402 is provided with a base recess 402g and an engaging recess 402f. The base concave portion 402g and the engaging concave portion 402f are provided on the lower surface of the upper protruding portion 402b (that is, the surface facing the lower protruding portion 401a). The base concave portion 402g is provided so as to extend from the distal end in the left-right direction of the upper projecting portion 402b toward the proximal end. The engaging recess 402f is provided so as to extend in the front-rear direction so as to be connected to the base recess 402g. An engaging wall 402h is provided on the right side of the engaging recess 402f.

When engaging two adjacent hydroponic panels 410 with each other, as shown in FIGS. 35 and 36A, the left panel 411 and the right panel 412 are brought close to each other, and then the right panel 412 is engaged. The mating projection 401 f is inserted into the base recess 402 g of the left panel 411 . As shown in FIG. 37A, when the engaging projection 401f is inserted into the engaging recess 402f to a position opposed to the front-rear direction, the right panel 412 and the left panel 411 are moved relative to each other in the front-rear direction as shown in FIG. 37B. The engagement projection 401f is inserted into the engagement recess 402f by moving the engagement projection 401f. In this state, the engaging protrusion 401f and the engaging recess 402f are engaged with each other as shown in FIG. The joint wall 402h abuts and can transmit a tensile force between the left panel 411 and the right panel 412 . The engaging projection 401f and the engaging wall 402h are preferably solid. In this case, the strength of the engaging projection 401f and the engaging wall 402h increases, and when a tensile force is applied in the direction of separating the right panel 412 and the left panel 411, the engaging projection 401f and the engaging wall 402h are less likely to deform. Become.

In the fifth embodiment, in order to engage the right panel 412 and the left panel 411, it is necessary to get over the protrusion projecting in the thickness direction. The workability when engaging the 411 tends to deteriorate. On the other hand, in the present embodiment, the left panel 411 and the right panel 412 can be engaged by moving relative to each other in the plane, so workability is excellent.

By the way, since the base concave portion 402g and the engaging concave portion 402f are provided on the lower surface of the hydroponic cultivation panel 410, when the left panel 411 and the right panel 412 are to be engaged while viewed from above, the base concave portion 402g cannot be visually recognized, and it is not easy to insert the engaging protrusion 401f into the base recess 402g. If the length of the base recessed portion 402g in the front-rear direction is increased, it becomes easier to insert the engaging projection 401f into the base recessed portion 402g. The engagement between the panel 411 and the right panel 412 is likely to be released unintentionally.

In order to solve such a problem, in the present embodiment, as shown in FIG. 36B, the engaging protrusion 401f is arranged at a position farther from the engaging wall 402h than the position where it can be inserted into the base recess 402g. In this case, the upper protruding portion 401b and the upper protruding portion 402b abut before the engaging protrusion 401f contacts the upper protruding portion 402b. A guide structure 410c that guides the engagement protrusion 401f to a position where it can be inserted into the base recess 402g is provided at a portion where the upper protrusion 401b and the upper protrusion 402b abut. is brought closer, the guide structure 410c guides the engagement protrusion 401f to a position where it can be inserted into the base recess 402g, so that the engagement protrusion 401f can be easily inserted into the base recess 402g.

The guide structure 410c is composed of a side surface 402cb1 of the left panel 411 and a side surface 401ca1 of the right panel 412. Compared to the first embodiment, the side surface 402cb1 and the side surface 401ca1 that constitute the guide structure 410c have a larger inclination angle with respect to the front-rear direction. 402cb1 and the side surface 401ca1 are in contact with each other to guide the engagement projection 401f to a position where it can be inserted into the base recess 402g. Of the side surface 402cb1 and the side surface 401ca1 that constitute the guide structure 410c, the inclination angle at the portion having the largest inclination angle is, for example, 60 to 90 degrees. 85, 90 degrees, and may range between any two of the values exemplified herein.

(Embodiment of fourth aspect)
An embodiment of the fourth aspect of the present invention will be described with reference to the drawings. As shown in FIG. 39, a hydroponic cultivation bed 501 according to the embodiment includes a main body portion 510 having a substantially rectangular outer shell and a substantially concave shape (in other words, a substantially shallow plate shape) opened upward. there is A nutrient solution used for, for example, hydroponic cultivation of plants is stored in the main body 510, and a hydroponic cultivation panel carrying a plant is floated on the nutrient solution. The body portion 510 is entirely made of hard plastic (non-foam material) and has a hollow interior. In the following description, the short side direction of the main body 510 is the front-rear direction (the front side in FIG. 39 is the front side) (second direction), and the long side direction is the left-right direction (the left side in FIG. 11 is the left side) (first direction). direction).

The body portion 510 has a bottom plate portion 512 that constitutes a bottom plate, and side plate portions 514 that rise shallowly from the front, rear, left, and right edges 512a, 512b, 512c, and 512d of the bottom plate portion 512 and constitute side plates. The side plate portion 514 has a rising portion 514a that rises slightly outward from the edge of the bottom plate portion 512 in two stages, and an overhanging portion 514b that horizontally projects outward from the rising tip of the rising portion 514a. have. A reinforcing rib 514a1 protruding inward (toward the bottom plate portion 512) is provided over substantially the entire area of the rising portion 514a. Further, the main body portion 510 has air blowing portions 516, which are provided on the front and rear projecting portions 514b on both sides, and for sending air (fluid) to the bottom plate portion 512 side, which will be described later.

As shown in FIG. 40, the body portion 510 is separated into a plurality of connection units 520, 530, 540 that are connected in the left-right direction. Specifically, the body part 510 is connected to a left end connection unit 520 connected to the left end, a right end connection unit 530 connected to the right end, and connected between the left end connection unit 520 and the right end connection unit 530 . An intermediate connecting unit 540 is composed of three connecting units 520 , 530 , 540 . Each of the connection units 520, 530, 540 has a substantially square outline and substantially the same size.

The left end connection unit 520, the right end connection unit 530, and the intermediate connection unit 540 have a left end bottom plate portion 522, a right end bottom plate portion 532, and an intermediate bottom plate portion 542, respectively, which constitute a part of the bottom plate portion 512 of the main body portion 510. , a left end side plate portion 524 , a right end side plate portion 534 , and an intermediate side plate portion 544 which constitute a part of the side plate portion 514 of the main body portion 510 . The left end side plate portion 524, the right end side plate portion 534, and the intermediate side plate portion 544 respectively have a left end rising portion 524a, a right end rising portion 534a, and an intermediate rising portion 544a that constitute a part of the rising portion 514a of the main body portion 510, It has a left end projecting portion 524b, a right end projecting portion 534b, and an intermediate projecting portion 544b, which constitute a part of the projecting portion 514b of the main body portion 510, respectively.

In the left end connection unit 520, the left end side plate portion 524 rises from the front and rear end edges 522a, 522b and the left end edge 522c of the left end bottom plate portion 522, and the right side (end edge 522d side) is open in the left-right direction. (That is, the left end side plate portion 524 is not provided). In the right end connection unit 530, a right end side plate portion 534 rises from the front and rear edges 532a and 532b and the right end edge 532d of the right end bottom plate portion 532, and the left side (edge 532c side) is open in the left-right direction. (That is, the right end side plate portion 534 is not provided). In the intermediate connection unit 540, the intermediate side plate portion 544 rises from the front and rear edges 542a and 542b of the intermediate bottom plate portion 542, and the left and right sides (edges 542c and 542d) are opened in the left and right direction (that is, , the intermediate side plate portion 544 is not provided).

In addition, the left end connection unit 520 has a lower connection portion (first fitting portion) 526 on the right (open side) edge 522d side. The right end connection unit 530 has an upper connection portion (second fitting portion) 538 on the left (open side) edge 532c side. The intermediate connecting unit 540 has an upper connecting portion (second fitting portion) 548 on the left (open side) edge 542c side and a lower connecting portion (second fitting portion) 548 on the right (open side) edge 542d side. It has a side connecting portion (first fitting portion) 546 .

As shown in FIG. 41 , the lower connecting portion 546 of the intermediate connecting unit 540 is thinner than the intermediate bottom plate portion 542 and the intermediate side plate portion 544 . Specifically, the lower connecting portion 546 is the inner portion of the intermediate bottom plate portion 542 and the intermediate side plate portion 544 in the thickness direction (the upper portion of the intermediate bottom plate portion 542, the rear portion of the intermediate side plate portion 544 on the front side, the rear side). The front side portion of the intermediate side plate portion 544) is removed. On both left and right sides of the lower connecting portion 546, there are provided fitting recesses 546a that open upward and extend in a groove shape along the front-rear direction.

Between the fitting recesses 546a, a pair of sealing material accommodating parts 546b each accommodating a sealing material 550 are provided in a groove shape along the front-rear direction (see FIG. 43). The sealing material 550 accommodated in each sealing material accommodating portion 546b has a substantially prismatic shape and extends in the front-rear direction. The sealing material 550 is made of silicon rubber, for example. The vertical thickness of the sealing material 550 is smaller than the horizontal thickness, and the upper surface of the sealing material 550 is located slightly above the opening of the sealing material accommodating portion 546b. Each fitting recess 546 a and each sealing material 550 (each sealing material housing part 546 b ) are provided from the vicinity of the front end to the vicinity of the rear end of the lower connecting part 546 .

A plurality of lower screw holes 546c (parts to be screwed) are provided between both sealing materials 550 (both sealing material housing portions 546b). In other words, both seal members 550 are provided in a manner to sandwich each lower screw hole 546c in the left-right direction. The plurality of lower screw holes 546c are provided at approximately equal intervals along the front-rear direction. A plurality of lower screw holes 546c are provided only in a portion of the lower connecting portion 546 extending from the intermediate bottom plate portion 542, and penetrate vertically. Also, the distance from each lower screw hole 546c to one sealing material 550 and the distance to the other sealing material 550 are substantially equal. A screw member S1, which will be described later, is inserted through each lower screw hole 546c. The lower connecting portion 526 provided on the left end connecting unit 520 also has the same configuration as the lower connecting portion 546 provided on the intermediate connecting unit 540 .

On the other hand, the upper connecting portion 548 of the intermediate connecting unit 540 is made thinner than the intermediate bottom plate portion 542 and the intermediate side plate portion 544, as shown in FIG. Specifically, the upper connecting portion 548 is the outer portion of the intermediate bottom plate portion 542 and the intermediate side plate portion 544 in the thickness direction (the lower portion of the intermediate bottom plate portion 542, the front portion of the intermediate side plate portion 544 on the front side, and the rear portion of the intermediate side plate portion 544). The rear portion of the intermediate side plate portion 544) is removed. The lower surface of the upper connecting portion 548 has a shape that follows the shape of the upper surface of the lower connecting portion 526 (lower connecting portion 546).

On both left and right sides of the upper connecting portion 548, fitting convex portions 548a are provided along the front-rear direction and protrude downward. A plurality of upper screw holes 548c through which the screw members S1 are inserted are provided along the front-rear direction between the fitting projections 548a. The upper connecting portion 538 provided in the right end connecting unit 530 has the same configuration as the upper connecting portion 548 provided in the intermediate connecting unit 540, and has a fitting convex portion 538a and an upper screw hole 538c at corresponding positions. provided (see FIG. 43).

As shown in FIG. 43 , the fitting projections 538 a and the upper screw holes 538 c of the upper coupling portion 538 provided on the right end coupling unit 530 are fitted to the lower coupling portions 546 of the intermediate coupling unit 540 . It is provided so as to vertically correspond to the joint recess 546a and each lower screw hole 546c. Therefore, by overlapping the upper connecting portion 538 of the right end connecting unit 530 and the lower connecting portion 546 of the intermediate connecting unit 540 in the vertical direction (normal direction of the plate surface of the intermediate bottom plate portion 542), the fitting protrusion 538a is fitted in the fitting recess 546a, and the opening of each upper screw hole 538c and the opening of each lower screw hole 546c are overlapped.

In this way, the upper connecting portion 538 of the right end connecting unit 530 and the lower connecting portion 546 of the intermediate connecting unit 540 are overlapped, and the screw member S1 is inserted from below into each lower screw hole 546c and each upper screw hole 538c. By screwing between the upper connecting portion 538 and the lower connecting portion 546, the right end connecting unit 530 and the intermediate connecting unit 540 are connected. By vertically fitting between the upper connecting portion 538 and the lower connecting portion 546, the thickness dimension thereof becomes substantially equal to the thickness dimension of the bottom plate portions 522, 532, 542 and the side plate portions 524, 534, 544. The top surfaces of the bottom plate portions 522, 532, 542 and the top surface of the upper connecting portion 538 (548) are located on the same plane. In this manner, two adjacent connection units 520, 530, 540 can be fitted vertically, so that connection can be easily performed.

Further, by screwing between the upper connecting portion 538 and the lower connecting portion 546 , the upper surface of each sealing member 550 provided on the lower connecting portion 546 presses the upper connecting portion 538 and the upper connecting portion 538 . abut. As a result, the space between the upper connecting portion 538 and the lower connecting portion 546 is sealed by the sealing materials 550 from the vicinity of the front end to the vicinity of the rear end. Therefore, in a state in which the connecting units 520, 530, 540 are connected to each other and the nutrient solution or the like is stored in the main body 510, the fitting portions (the lower connecting portions 526, 540) of the two connecting units 520, 530, 540 546 and the upper connecting portions 538, 548, and from each upper screw hole 538c and each lower screw hole 546c), it is possible to prevent leakage of the nutrient solution or the like. In addition, since the distances from each lower screw hole 546c to both seal members 550 are substantially equal, force is applied substantially equally to the pair of seal members 550 when screwing. The force pressing the connecting portions 538 and 548 can be substantially uniform. The connection between the upper connecting portion 548 provided on the intermediate connecting unit 540 and the lower connecting portion 526 provided on the left end connecting unit 520 also has the same connection mode.

Next, the blower section 516 attached to the main body section 510 of the hydroponic cultivation bed 501 will be described. As shown in FIG. 40, the air blower 516 is provided on the overhangs 524b, 534b, 544b of the connecting units 520, 530, 540, respectively. That is, the body portion 510 has six blower portions 516 . As shown in FIG. 41, the air blower 516 has a substantially semi-cylindrical shape with one flat surface, and an air passage 516a inside. The blower portion 516 is molded integrally with the main body portion 510 and is made of hard plastic (non-foaming material) like the main body portion 510 . The blower portion 516 has a dimension in the cylinder axis direction substantially equal to the lateral dimension of each projecting portion 524b, 534b, 544b provided in each of the connecting units 520, 530, 540. As shown in FIG. A plurality of outlets 516b are provided on the outer peripheral surface of the air blower 516 at approximately equal intervals along the cylinder axis direction. The opening of each blow-out port 516b has a laterally long elliptical shape (with the cylinder axis direction as the major axis direction) and is directed toward the bottom plate portion 542 (522, 532).

As shown in FIGS. 42 and 44, one end of the air blower 516 is provided with an inner connecting portion (connected port) 516d axially protruding from the end along the cylinder axis direction. . The inside of the inner connection portion 516d penetrates in the cylinder axis direction and communicates with the air passage 516a. The other end of the air blower 516 is provided with an outer connection portion (connection port) 516e that axially protrudes from the end along the cylinder axis direction. The inside of the outer connection portion 516e penetrates in the cylinder axis direction and communicates with the air passage 516a. Therefore, by sending air from the inner connection portion 516d or the outer connection portion 516e, the air can flow throughout the air passage 516a, and the air can flow from each outlet 516b toward the bottom plate portion 542 (522, 532). Air is blown out.

The opening diameter of the outer connecting portion 516e is approximately equal to the outer diameter of the inner connecting portion 516d. By inserting the inner connecting portion 516d into the outer connecting portion 516e, the inner connecting portion 516d is connected to the outer connecting portion 516e (see the broken line shown in FIG. 44). By connecting the inner connection portion 516d to the outer connection portion 516e, the air passages 516a provided inside the adjacent air blowing portions 516 communicate with each other. Therefore, by sending air from the opening of the inner connecting portion 516d or the outer connecting portion 516e exposed from one end side of the blowing portions 516 connected to each other, the air can flow through the blowing passages 516a of the blowing portions 516. can be done.

In this way, since the air blower 516 can blow air from either the opening of the inner connection part 516d or the opening of the outer connection part 516e, the hydroponic cultivation panel can be placed on the nutrient solution stored in the main body part 510. When carrying out hydroponic cultivation, the side where the air is sent (windward), that is, the side with a large air volume, is placed on the side with a large degree of growth, and the side where the air is discharged (leeward side), that is, the air volume is small. Plants with low growth rate can be placed on the side. Thereby, the growth of plants can be effectively promoted.

Next, the water supply units 529, 539, 549 provided in the hydroponic cultivation bed 501 will be described with reference to FIGS. Water supply portions 529 , 539 , 549 are provided on the lower surface side of bottom plate portions 522 , 532 , 542 of respective connection units 520 , 530 , 540 . That is, the main body part 510 has three water feeding parts 529 , 539 , 549 . Each of the water feeding portions 529, 539, 549 has the same configuration, and the water feeding portion 549 provided in the intermediate connection unit 540 will be described below.

The water supply part 549 is provided so as to extend over substantially the entire area of the lower surface of the bottom plate part 542 while bending multiple times in a curved shape. Inside the water supply section 549, a water supply channel 549a, which is a space through which water (fluid) flows, is formed. The lower surface of the bottom plate portion 542 is provided with a crimped portion 542e in which a part of the lower surface of the bottom plate portion 542 is crimped upward so as to surround the water supply passage 549a (in other words, the crimped portion 542e water feeding portion 549 is formed). That is, the water supply channel 549a is provided using a part of the space inside the hollow body portion 510, and is a space separated from the space inside the body portion 510 by the crimping portion 542e. there is Therefore, the water supply channels 529a, 539a, and 549a can be provided while reducing the weight of the hydroponic cultivation bed 501 .

One end of the water supply channel 549a (hereinafter referred to as a first introduction portion 549a1) is arranged at a substantially central position in the front-rear direction of a portion of the bottom plate portion 542 of the intermediate connection unit 540 that is close to the upper connection portion 548. The other end of the water supply channel 549a (hereinafter referred to as a second introduction portion 549a2) is arranged at a substantially central position in the front-rear direction of a portion of the bottom plate portion 542 of the intermediate connection unit 540 that is close to the lower connection portion 546. . Both of the first introduction portion 549a1 and the second introduction portion 549a2 have a substantially truncated cone shape, and an introduction port 549b opening downward is provided inside thereof. Water can be introduced into the water supply channel 549a through the inlet 549b.

A nozzle member 560 for opening and closing the introduction port 549b is attached to the introduction port 549b of each of the introduction portions 549a1 and 549a2. 43 and 45, each part of the left end connection unit 520 corresponding to the crimped portion 542e, the water supply portion 549, the water supply channel 549a, the first introduction portion 549a1 and the second introduction portion 549a2 of the intermediate connection unit 540 is Reference numerals 522e, 529, 529a, 529a1, and 529a2 indicate a right end corresponding to the crimping portion 542e of the intermediate connection unit 540, the water supply portion 549, the water supply passage 549a, the first introduction portion 549a1 and the second introduction portion 549a2, and the introduction port 549b. Each part of the connecting unit 530 is denoted by reference numerals 532e, 539, 539a, 539a1, 539a2 and 539b.

By opening the nozzle member 560 and introducing water into the water channels 529a, 539a, 549a from the inlets 539b, 549b, the connection units 520, 530, 540 provided with the water channels 529a, 539a, 549a are cooled. can do. Since the water supply portions 529, 539, 549 are provided over substantially the entire lower surfaces of the bottom plate portions 522, 532, 542, the connection units 520, 530, 540 can be effectively cooled.

Further, as shown in FIG. 45, the first introduction portions 529a1, 539a1, 549a1 provided on one side of the adjacent connection units 520, 530, 540 and the second introduction portions 529a2, 539a2, 549a2 provided on the other side of the adjacent connection units 520, 530, 540 can be connected by a hose member 570. As a result, the water channels 529a, 539a, and 549a communicate with each other through the hose member 570, so that by introducing water into some of the water channels 529a, 539a, and 549a, the water channels 529a, 539a, and 549a Water can be introduced.

As described above, the hydroponic cultivation bed 501 according to this embodiment includes the substantially concave main body 510 in which the liquid is stored. The body portion 510 has a hollow interior, and has an air passage 516a through which air flows and water passages 529a, 539a, and 549a through which water flows. As a result, air, water, and the like can flow through the hydroponic cultivation bed 501 without providing a separate member in the portion of the main body 510 where the nutrient solution or the like is stored. can be easily done. Thus, in this embodiment, it is possible to provide the hydroponic cultivation bed 501 that is excellent in durability and easy to maintain.

Furthermore, in the hydroponic cultivation bed 501 according to the present embodiment, the main body 510 is made of hard plastic, which is a non-foaming material. The nutrient solution or the like stored in 510 does not leak. Therefore, it is not necessary to lay a film member or the like on the portion where the nutrient solution is stored, unlike the conventional beds for hydroponic cultivation using polystyrene foam. Therefore, the cleaning of the portion of the main body 510 in which the nutrient solution is stored can be automated using a cleaning robot or the like, making the maintenance of the hydroponic bed 501 easier than before. be able to. In addition, since the inside of the main body part 510 is hollow, the weight of the hydroponic cultivation bed 501 can be reduced.

Further, in the hydroponic cultivation bed 501, the main body 510 is provided by three connecting units 520, 530, 540 connected in the left-right direction, and each of the connecting units 520, 530, 540 has a substantially rectangular shape. bottom plate portions 522, 532, 542 and side plate portions 524, 534, 544 rising from the edges of the bottom plate portions 522, 532, 542, and at least one side in the left-right direction is open in the left-right direction. Therefore, by connecting the open sides of the connecting units 520, 530, 540 to each other, the bottom plate portions 512, 532, 542 and the side plates can be connected to each other while the connecting units 520, 530, 540 are connected. A generally concave portion for retaining the nutrient solution surrounded by the portions 524, 534, 544 may be provided. Further, by configuring the body portion 510 in such a manner that a plurality of connection units 520, 530, and 540 are connected, the maintenance of the body portion 510 can be made easier.

In addition, in the hydroponic cultivation bed 501, each of the connection units 520, 530, 540 has lower connection portions 526, 546 and upper connection portions 538, 548 on the open side, and two adjacent connection portions are provided. The lower connecting portions 526, 546 and the upper connecting portions 538, 548 of the units 520, 530, 540 are connected by being fitted to each other. Thereby, a specific configuration for connecting two adjacent connection units 520, 530, 540 can be provided.

In addition, the hydroponic cultivation bed 501 includes rising tip portions (stretching) of the side plate portions 524, 534, and 544 that rise from the edges of the bottom plate portions 522, 532, and 542 on both sides in the front-rear direction orthogonal to the left-right direction. The air passages 516a are provided in the outlet portions 524b, 534b, 544b) and send air along the left-right direction as flow passages. It has an air outlet 516b that blows out into the air. As a result, in a state in which the hydroponic cultivation panel in which the nutrient solution is stored in the main body 510 and the plant is floated on the nutrient solution, air is sent to the plant side (the side of the bottom plate portions 522, 532, 542). can provide a specific configuration for

In addition, the hydroponic cultivation bed 501 is provided on the lower surface side of the bottom plate portions 522, 532, and 542 (on the side opposite to the side where the side plate portions 524, 534, and 544 rise), and the water channels 529a, 539a, and 549a for sending water. are included as channels, and the water channels 529a, 539a, 549a have inlets 539b, 549b at both ends thereof for introducing water into the water channels 529a, 539a, 549a. As a result, the nutrient solution can be cooled by flowing cooling water through the water supply channels 529a, 539a, and 549a in a state where the nutrient solution is stored in the main body 510. FIG. Therefore, it is possible to provide a specific configuration for providing the water supply channels 529a, 539a, 549a for cooling the nutrient solution inside the main body 510. FIG. Furthermore, by connecting the adjacent inlets 539b, 549b with the hose member 570, the water supply channels 529a, 539a, 549a can be connected between the adjacent connection units 520, 530, 540, and each connection unit 520, Cooling water can be supplied collectively to 530 and 540 .

Here, in the case of a configuration in which a water channel is provided on the upper surface side of the bottom plate portion, the water channel is immersed in the solution when the nutrient solution is stored in the main body, and the roots of the plants are entangled in the water channel. problems such as difficulty in cleaning the portion where the nutrient solution is stored may occur. On the other hand, in the hydroponic cultivation bed 501 of the present embodiment, the upper surfaces of the bottom plate portions 522, 532, and 542 are flattened by providing the water channels 529a, 539a, and 549a on the lower surface side of the bottom plate portions 522, 532, and 542. Therefore, it is possible to prevent the above problems from occurring.

Although the embodiment of the fourth aspect of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist thereof. For example, the size, arrangement, shape, etc. of each hole provided in the hydroponics panel can be changed as appropriate. For example, in the above embodiments, an example in which the hydroponic cultivation bed is configured by three connection units that are connected to each other is shown, but two or four or more connection units that connect the hydroponic cultivation bed to each other It may be configured by a unit. In addition, in the above-described embodiment, the air blower is formed integrally with the main body. There may be.

10: hydroponics panel, 10a: upper surface, 10b: lower surface, 12: handle, 20: hole, 30: upper surface side sheet, 30a: first molten resin sheet, 32: upper surface side opening, 40: lower surface side sheet , 42: lower surface side opening, 42a: first tapered portion, 42b: second tapered portion, 50: plug body, 60: resin molding apparatus, 61: first mold, 61a: cavity, 61b: pinch-off portion, 62 : Second mold 62a: Cavity 62b: Pinch-off portion 63: Formwork 64: Formwork 71: First pin 72: Second pin 120: Hole 132: Top side opening 142: Lower surface side opening, 142a: first tapered portion, 220: hole, 232: upper surface side opening, 242: lower surface side opening, D1 to D5: opening diameter, J: junction, N: nutrient solution, P: plant , S: space, W1, W2: horizontal width, W3 to W5: vertical width, θ1 to θ3: inclination angle, 304: cultivated product, 305: parison, 305a: first resin sheet, 305b: second resin sheet, 305c: Burr, 307: Welding part, 308: Molded body, 309: Nutrient solution, 310: Hydroponics panel, 310a: Upper surface, 310b: Lower surface, 320: Hole, 320a: Base surface, 320b: Inner edge, 320c: Lower side Side surface 320d: Protrusion 320e: Tapered surface 320f: Outer edge 320g: Site 320h: Outer edge 320i: Upper side surface 320j: Non-thin portion 320k: Cut surface 320l: Protruding resin portion 321: First gold Mold, 321a: first rib, 321b: first base, 321c: first mounting projection, 321e: first mounting hole, 321f: shaping surface, 321g: tip surface, 321h: outer edge, 321i: annular surface, 321j: recess 322: second mold 322a: second rib 322b: second base 322c: second mounting projection 322e: second mounting hole 322f: shaping surface 322g: tip surface 322h: outer edge; 322i: annular surface, 322j: concave portion, 323: resin reservoir, 350: plug, B: region, C1: center position, C2: center position, D1: opening diameter, D2: opening diameter, D3: opening diameter, E: Region, P: plant, α: angle, γ: inclination angle, θ: angle, 401: left side surface, 401a: lower protrusion, 401a1: inclined surface, 401a2: upper surface, 401a3: engaging portion, 401a4: root edge 401b1: Inclined surface 401b2: Lower surface 401b3: Engaging portion 401b6: Tip 401c: Uneven portion 401ca: Recessed portion 401ca1: Side surface 401ca2: Stepped portion 401ca3 : bottom surface 401cb: convex portion 401cb3: tip 401d: flat portion 401f: engaging protrusion 402: right side surface 402a: lower projecting portion 402a1: inclined surface 402a2: upper surface 402a3: engaging portion 402b: upper protruding portion, 402b1: inclined surface, 402b2: lower surface, 402b3: engaging portion, 402b4: root edge, 402b5: tip edge, 402b6: tip, 402c: uneven portion, 402ca: recessed portion, 402ca3: bottom surface, 402cb: Protruding portion 402cb1: side surface 402cb2: stepped portion 402cb3: tip 402d: flat portion 402f: engaging recessed portion 402g: base recessed portion 402h: engaging wall 403: overlapping portion 403a: first overlapping portion 403b: second overlapping portion, 410: hydroponic cultivation panel, 410a: upper surface, 410b: lower surface, 410c: guide structure, 411: left panel, 412: right panel, 413: hydroponic cultivation panel system, 420: hole , PL: parting line, 501: bed for hydroponic cultivation, 510: body portion, 512: bottom plate portion, 512a: edge, 512b: edge, 512c: edge, 512d: edge, 514: side plate portion, 514a: rising portion, 514a1: reinforcing rib, 514b: projecting portion, 516: air blowing portion, 516a: air blowing passage, 516b: air outlet, 516d: inner connecting portion, 516e: outer connecting portion, 520: left end connection unit, 522 : left end bottom plate portion 522a: edge 522b: edge 522c: edge 522d: edge 522e: crimping portion 524: left end side plate portion 524a: left end rising portion 524b: left end projecting portion 526: lower connection portion, 529: water supply portion, 529a: water supply channel, 529a1: first introduction portion, 529a2: second introduction portion, 530: right end connection unit, 532: right end bottom plate portion, 532a: edge, 532b: Edge 532c: Edge 532d: Edge 532e: Crimp portion 534: Right end side plate portion 534a: Right end rising portion 534b: Right end projecting portion 538: Upper connecting portion 538a: Fitting protrusion , 538c: upper screw hole, 539: water supply part, 539a: water supply channel, 539a1: first introduction part, 539a2: second introduction part, 539b: introduction port, 540: intermediate connection unit, 542: intermediate bottom plate part, 542a: edge, 542b: edge, 542c: edge, 542d: edge, 542e: crimped portion, 544: intermediate side plate portion, 544a: intermediate rising portion, 544b: intermediate projecting portion, 546: lower connecting portion, 546a: fitting recess, 546b: sealing material accommodating portion, 546c: lower screw hole, 548: upper connecting portion, 549: water supply portion, 549a: water supply channel, 549a1: first introduction portion, 549a2: second introduction portion, 549b: introduction port, 550: sealing material, 560: nozzle member, 570: hose member, S1: screw member

Claims

A hydroponics panel provided with a plurality of holes,
The hole has an upper surface side opening portion that opens to the upper surface side of the hydroponic cultivation panel into which the plant is inserted, and an upper surface side opening portion that communicates with the upper surface side opening portion and opens to the lower surface side of the hydroponic cultivation panel. a lower surface side opening having a shape that gradually expands in diameter toward the lower surface side,
The inside is hollow, the upper surface side opening is formed by bending a part of the upper surface toward the inside, and the lower surface side opening is formed by bending a part of the lower surface toward the inside. is formed by
At least the upper surface side is formed of a non-foamed material,
A hydroponics panel characterized by:
2. The hydroponic system according to claim 1, wherein the lower surface side opening is inclined in multiple stages in such a manner that the inclination angle with respect to the normal direction of the hydroponic cultivation panel gradually decreases toward the lower surface side. Cultivation panel.
The upper surface side sheet provided on the upper surface side and the lower surface side sheet provided on the lower surface side are attached to each other,
The lower surface side opening is formed by bending a part of the lower surface side sheet toward the inside,
The hydroponic cultivation panel according to claim 1 or 2, characterized in that:
The hydroponic cultivation panel according to any one of claims 1 to 3, wherein the upper surface side opening is tapered so as to gradually increase in diameter toward the upper surface side. .
A method for manufacturing a hydroponics panel provided with a plurality of holes,
a placing step of placing the first molten resin sheet in the first mold and placing the second molten resin sheet in the second mold;
a welding step of clamping the first mold and the second mold to weld the first molten resin sheet and the second molten resin sheet;
In the placing step, the first mold is provided with a projecting portion whose outer surface gradually expands in diameter toward the first mold, and the first molten resin sheet is placed on the surface including the projecting portion. providing the hole at a position overlapping the protrusion of the first molten resin sheet by arranging the
A method for manufacturing a hydroponics panel, characterized by:
A hydroponics panel,
The panel is provided with a hole into which the cultivated material is inserted so as to penetrate the panel in the vertical direction,
The hole is provided with an annular base surface and an upper side surface extending from the outer edge of the base surface toward the upper surface,
The panel, wherein the base surface and the upper side surface are non-parallel.
A panel according to claim 6, comprising:
The hole is provided with a lower side surface extending from the inner edge of the base surface toward the lower surface,
The panel, wherein the angle between said base surface and said lower side surface is between 20 and 90 degrees.
A panel according to claim 7, comprising:
The panel, wherein the lower side surface is a tapered surface that is inclined so as to gradually increase in diameter toward the lower surface.
A method for manufacturing a hydroponics panel,
Equipped with an arrangement process, a molding process, and a post-processing process,
In the arranging step, the parison is arranged between the first and second molds with the first and second molds that can be opened and closed to each other in an open state,
The first mold has a first rib,
The second mold has a second rib,
The first and second ribs are arranged to face each other,
The diameter of the outer edge of the tip surface of the first rib is larger than the diameter of the outer edge of the tip surface of the second rib,
In the molding step, the first and second molds are closed with the parison disposed between the first mold and the second mold, and the first and second ribs are brought into contact with each other to form the forming a welded portion by welding opposite inner surfaces of a parison to each other, and molding the parison into a panel shape to form a compact;
The method according to claim 1, wherein the post-processing step removes the welded portion to form a hole.
The manufacturing method according to claim 9,
The method according to claim 1, wherein the removal of the welded portion is performed along the outer edge of the portion against which the tip surface of the second rib is pressed.
11. A method according to claim 9 or claim 10,
At least one of the tip surface of the first rib and the tip surface of the second rib is provided with an annular annular surface,
The method, wherein the inner side of the annular surface is provided with a recess.
12. The method of claim 11, wherein
The annular surface is provided on both the tip surface of the first rib and the tip surface of the second rib,
The method, wherein the width of the annular surface of the first rib is greater than the width of the annular surface of the second rib.
A hydroponics panel,
The panel has a left side and a right side,
The left side surface includes a lower protruding part in which the lower side of the left side protrudes more than the upper side, and an upper protruding part in which the upper side of the left side protrudes more than the lower side,
The right side surface includes a lower protruding part in which the lower side of the right side protrudes more than the upper side, and an upper protruding part in which the upper side of the right side protrudes more than the lower side,
The lower protruding portion on the left side and the upper protruding portion on the right side are provided at positions facing each other in the left-right direction,
The panel, wherein the upper protruding portion of the left side surface and the lower protruding portion of the right side surface are provided at positions opposed to each other in the left-right direction.
14. A panel according to claim 13, comprising:
the left side surface includes a pair of the upper protrusions, and on the left side surface the lower protrusion is disposed between the pair of the upper protrusions;
The panel, wherein the right side surface comprises a pair of the lower protrusions, and on the right side surface the upper protrusion is located between the pair of the lower protrusions.
14. A panel according to claim 13, comprising:
The left side surface and the right side surface each include a flat portion that is flat in a range spanning the convex portion and the concave portion at a portion adjacent to the uneven portion having the concave portion and the convex portion in the thickness direction,
The panel, wherein the flat portion on the left side and the flat portion on the right side are provided at positions facing each other in the left-right direction.
The panel according to any one of claims 13 to 15,
A panel, wherein the panel does not have a point-symmetrical shape.
The panel according to any one of claims 13 to 15,
The panel, wherein the panel has a point-symmetrical shape.
A hydroponic panel system configured by arranging a plurality of hydroponic panels in series,
the plurality of hydroponic panels comprising a left panel and a right panel adjacent to each other;
The left panel and the right panel are panels according to any one of claims 13 to 15, respectively;
overlapping such that the upper protrusion of the right side surface of the left panel is positioned above the lower protrusion of the left side surface of the right panel;
A panel system wherein the lower protrusion of the right side of the left panel overlaps such that it is positioned below the upper protrusion of the left side of the right panel.
Equipped with a substantially concave body portion in which liquid is stored,
The main body has a hollow interior, and has a flow path through which a fluid flows in a part of the interior.
A hydroponics bed characterized by:
The main body is provided by a plurality of connection units connected in a first direction,
Each of the plurality of connecting units has a substantially rectangular bottom plate portion and a side plate portion rising from an edge of the bottom plate portion, and at least one side in the first direction is open in the first direction.
The bed for hydroponics according to claim 19, characterized by:
Each of the plurality of connection units has a fitting portion on the open side, and is connected by fitting the fitting portions of two adjacent connection units together.
The bed for hydroponics according to claim 20, characterized by:
The flow passages are provided at the rising tip portions of the side plate portions respectively rising from the edges on both sides of the edges in a second direction perpendicular to the first direction, and blowing air along the first direction. including roads,
The air passage has an outlet for blowing out the air flowing in the air passage to the bottom plate portion side,
The bed for hydroponics according to claim 20 or 21, characterized by:
The flow path includes a water supply path that is provided on the opposite side of the bottom plate from the side on which the side plate rises and sends water,
The water channel has inlets at both ends for introducing water into the water channel,
The bed for hydroponics according to any one of claims 20 to 22, characterized in that: