JP2000354431A - Plant-culturing container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plant-culturing container capable of surely and strongly holding a supporting pole member for a culturing plant. SOLUTION: This plant-culturing container is provided by mounting a culturing frame body 5 formed with a culturing floor part 4 for housing a culturing floor material as demountable at a opening part 2A of the culturing container 2 for receiving a nutritious liquid supplied from a nutritious liquid-housing container 1, and forming a mounting part 6 capable of mounting the nutritious liquid-housing container 1 as demountable and also a holding part 11 holding a supporting pole member 10 for a cultured plant as freely capable of putting in and taking out at a position where a culturing frame body 5 and the culturing container 2 are opposing each other in their up and down direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a plant cultivator for cultivating a plant using a nutrient solution.

[0002]

2. Description of the Related Art Conventionally, as a plant cultivator of this type, there is a floor soil storage recess for storing floor soil in an opening of a cultivation container for receiving a nutrient solution, and a nutrient solution storage for supplying a nutrient solution to the cultivation container. A cultivation frame body having a container mounting concave portion for detachably mounting a container has been proposed which is detachably mounted (see, for example, Japanese Utility Model Publication No. 4-49895).

[0003]

However, depending on the type of cultivated plant, it is necessary to provide a support member for supporting the cultivated plant in order to assist its growth. Therefore, in the case of the above-mentioned conventional plant cultivator, the pillar member is pierced into the floor soil stored in the floor soil storage recess formed in the cultivation frame and held in the vertical position, but the depth of the floor soil storage recess is reduced. The shallow depth of the strut member with respect to the floor soil is short, and since such floor soil is generally soft to promote the growth of root hairs of cultivated plants, the holding power of the strut member by the floor soil is low. There was a problem of falling short and easily falling.

[0004] The present invention has been made in view of the above-mentioned circumstances, and a main problem thereof is to provide a cultivation plant supporting member that can be securely and firmly provided by rational improvement of a cultivation frame and a cultivation container. An object of the present invention is to provide a plant cultivator that can be held.

[0005]

The feature of the plant cultivator according to claim 1 of the present invention is that a cultivation floor material is stored in an opening of a cultivation container that receives a nutrient solution supplied from a nutrient solution storage container. The cultivation frame body forming the cultivation floor is detachably mounted, and the cultivation frame body is formed with a holding portion for detachably holding the nutrient solution storage container. A holding portion for holding a column member for a cultivated plant so as to be able to be freely inserted and removed is formed at a portion opposed to each other in the vertical direction. According to the above-mentioned characteristic configuration, by piercing the support member formed in the holding portion formed in a vertically opposed portion between the cultivation frame and the cultivation container, the support member extends over the cultivation frame and the cultivation container. It is held in a vertical posture.
Moreover, since the load of the cultivated plant, the cultivation floor material, the nutrient solution storage container, and the nutrient solution stored in the nutrient solution storage container is added to the cultivation frame, the cultivation frame is displaced with respect to the cultivation container. Therefore, even if an external force acts on the support member due to the falling of the cultivated plant, the external force can be received by the upper and lower holding portions. Therefore, the pillar member is surely in the vertical position,
It can be held firmly.

[0006] A feature of the plant cultivator according to claim 2 of the present invention is that the cultivation frame is provided with an attachment portion of oxygen supply means for supplying oxygen to a nutrient solution in a cultivation container, The liquid storage container is provided with a nutrient solution supply amount control means for maintaining the liquid level of the nutrient solution in the cultivation container at the set liquid level. According to the above-mentioned characteristic configuration, fresh oxygen can be supplied to the nutrient solution in the cultivation container. Therefore, the cultivated plant can supply not only water and nutrients in the nutrient solution but also fresh oxygen from its root hair. Can promote the growth of cultivated plants. In the cultivation container, the nutrient solution is automatically supplied from the nutrient solution storage container, and the liquid level of the nutrient solution in the cultivation container is maintained at the set liquid level by the nutrient solution supply amount control means. Therefore, usually, it is only necessary to pay attention to running out of the nutrient solution stored in the nutrient solution storage container, and it is not necessary to always pay attention to excess and deficiency of the nutrient solution in the cultivation container.

[0007] A feature of the plant cultivator according to claim 3 of the present invention is that the holding portion has a through hole for a support member formed in the cultivation frame, and a lower end of the support member is detachable from a vertical direction. And an engaging portion formed at the bottom of a simple cultivation container. According to the above-mentioned characteristic configuration, among the vertically opposed portions of the cultivation frame and the cultivation container, a support member insertion hole through which the support member is inserted into the cultivation frame is formed, and the support is provided at the bottom of the cultivation container. Since the lower end of the member only forms an engaging portion that can be disengaged from the vertical direction, the structure of the holding portion can be simplified, and the production cost of the plant cultivator increases with the manufacturing cost of the holding portion. Can be suppressed.

[0008]

1 to 7 show a plant cultivator according to the present invention for cultivating a plant using a nutrient solution. As shown in FIGS. 1 and 2, the nutrient solution is stored therein. A nutrient solution tank 1 as a nutrient solution storage container, a synthetic resin cultivation container 2 having an upward opening posture formed in an oblong shape in plan view, and an cultivation floor formed in an oblong shape in plan view. A cultivation frame for receiving a nutrient solution supplied from the nutrient solution tank 1, comprising a synthetic resin cultivation frame 5 having a floor material storage concave portion 4 as a cultivation floor portion for storing the material 3. The cultivation frame 5 is detachably attached to the opening 2A of the nut 2, and the cultivation frame 5 is attached to the nutrient solution storage container 1 in a state adjacent to one longitudinal end of the floor material storage recess 4. A mounting portion 6 for detachably mounting is formed.

More specifically, as shown in FIG. 6, legs 7 are integrally formed at a plurality of locations on the lower surface of the bottom wall 4A of the floor material storage recess 4 in the cultivation frame 5, and these legs 7 The bottom wall 4 </ b> A of the floor material storage recess 4 is in contact with the bottom 2 </ b> B of the cultivation container 2.
The cultivation frame 5 is placed in the cultivation container 2 with the nutrient solution reservoir 8 formed between the cultivation container 2 and the bottom of the cultivation container 2.
The cultivation frame 5 is configured to be detachably attached to the opening 2A.

In the floor material storage recess 4, floor soil, which is an example of the cultivation floor material 3, is stored, and a large number of floor soils are provided on the bottom wall 4 A of the floor material storage recess 4 of the cultivation frame 5. As shown in FIG. 6, the liquid surface level H of the nutrient solution received in the cultivation container 2 is raised to a level at which the bottom wall 4A of the floor material storage recess 4 is immersed in the nutrient solution. By doing so, the nutrient solution can be penetrated into the floor soil 3 through the large number of holes 9, and as shown in FIG. Can be tolerated through.

As shown in FIG. 1 to FIG.
In the state where the cultivation frame 5 is attached to the opening 2A of the cultivation frame 5, the peripheral flange 5A of the cultivation frame 5 and the bottom of the cultivation container 2 that are vertically opposed to each other. 2B
Is formed with a holding portion 11 for holding the column member 10 for cultivated plants in a freely removable manner.

The holding portion 11 has a through hole 11A for a column member formed through a portion of the peripheral flange portion 5A located on both sides in the short direction of the floor material storage concave portion 4; A support member concave portion 11B as a receiving portion formed on a bottom portion 2B of the cultivation container 2 whose lower end is freely insertable and removable from the vertical direction.
The support member 10 is inserted into the support member insertion hole 11A from above, and the lower end of the support member 10 is engaged with the support member concave portion 11B. The cultivation frame 5 and the cultivation container 2 are securely and firmly held in the vertical position. The support member recess 11B includes a U-shaped protrusion protruding from the bottom 2B of the cultivation container 2 and a recess surrounded by a peripheral wall 2C of the cultivation container 2. In addition, a plurality of holding portions 11 composed of the support member insertion holes 11A and the support member concave portions 11B are provided at a plurality of locations (in this embodiment, on both sides in the short direction of the floor material storage recess 4 in plan view). 3 locations).

As shown in FIGS. 3 and 4 (a) and (b), the outer side of the lateral side walls 4B forming the floor material storage recesses 4 is provided with the support members for the support members. A guide portion 12 having a substantially E-shaped cross section in a plan view is formed to move and guide the lower end of the support member 10 inserted through the insertion hole 11A to the support member recess 11B located below the support member insertion hole 11A. It is formed. Therefore, the support member insertion hole 11A
The support member 10 inserted into the guide plate 12
Since it is reliably moved and guided to the support member recess 11B through the space between 2A, the lower end of the support member 10 inserted into the support member insertion hole 11A is positioned below the support member insertion hole 11A. 11B can be reliably inserted.

The support member 10 for a cultivated plant is a rod-shaped member for preventing lodging of the cultivated plant P as it grows as shown in FIG. Then, the stem of the cultivated plant P is fixed with a string or the like, or when the cultivated plant P is a vine, the vine is wound.

Further, this plant cultivator has a structure shown in FIGS.
As shown in FIG. 7, an air pump 13 which is an example of an oxygen supply unit that supplies oxygen to the nutrient solution in the cultivation container 2 is provided. The air pump 13 takes in outside air and feeds air into the nutrient solution in the cultivation container 2. Of the cultivation frame 5, the floor material storage recess 4 and the mounting portion 6 of the nutrient solution tank 1 are provided. Are attached and fixed to the upper surface of a plate-like portion 14 connecting the two. That is, the cultivation frame 5 is formed with a plate-like portion 14 which is a mounting portion of the air pump 13 as an oxygen supply means. The air pump 13 is connected in communication with an air supply hose 15 for guiding the air sent from the air pump 13 into the nutrient solution, and the distal end of the air supply hose 15 extends along the bottom 2B of the cultivation container 2. And a tubular air ejection portion 16 made of a continuous foam (for example, sponge).

As shown in FIGS. 6 and 7, the air sent from the air pump 13 to the air ejection section 16 through the air supply hose 15 is supplied to the air ejection section 16 in the nutrient solution in the cultivation container 2. From the air, and oxygen in the air is supplied to the nutrient solution in the cultivation container 2.

The air pump 15 is an electric pump and supplies electric power from a household power supply (not shown).

As shown in FIG. 1, on both sides of the plate-like portion 14 of the cultivation frame 5, there are provided sight holes 17 for checking the presence or absence of dirt or contaminants of the nutrient solution in the cultivation container 2. In addition to being formed through, the ventilation inside and outside the cultivation container 2 can be ensured through the viewing hole 17.

Further, the nutrient solution tank 1 mounted on the mounting portion 6 of the cultivation frame 5 has a cultivation container 2 as shown in FIG.
There is provided a nutrient solution supply amount control means 19 for maintaining the liquid level H of the nutrient solution supplied therein to the set liquid level, and further, the nutrient solution tank 1 is provided with the set liquid level. Level adjusting means 20 for changing and adjusting the temperature
Is provided.

More specifically, as shown in FIG. 5, the nutrient solution tank 1 has a container body 21 made of a synthetic resin and formed into a bottomed cylindrical shape with a slightly larger diameter as it goes upward. A lid 23 made of a synthetic resin having a liquid inlet 22 smaller in diameter than the opening, and the lid 23 is held in the opening of the container body 21 in a liquid-tight manner. . A cap 24 made of synthetic resin is detachably screwed to the liquid inlet 22 of the lid 23.

A liquid injection tube 26 made of a synthetic resin which is elastically deformable is inserted and held in an opening 25 formed in the cap 24 so as to be able to retreat and retreat. The outer peripheral surface of the liquid injection pipe 26 is elastically brought into close contact with the liquid injection pipe 26 in a state where the liquid injection pipe 26 is allowed to move back and forth.
The nutrient solution is prevented from leaking from between the contact surfaces between the inner peripheral surface of the opening 25 and the outer peripheral surface of the liquid injection tube 26.

The cap 24 with the liquid injection pipe 26 inserted and held is removed from the liquid injection port 22 of the lid 23, and the liquid injection port 22 is opened. Can be supplied with nutrient solution.

As shown in FIGS. 1 and 5, the mounting portion 6 of the cultivation frame 5 has a tank mounting recess formed integrally with the cultivation frame 5, and the nutrient solution tank 1 has The nutrient solution stored in the nutrient solution tank 1 is mounted on the peripheral edge of the opening of the tank mounting recess portion 6 with the lid 23 side facing downward. Is supplied once.

On the lower surface of the bottom wall 6A of the tank mounting recess 6, a projection 28 for forming a gap 27 with the bottom 2B of the cultivation container 2 is integrally formed, and the bottom wall 6A of the tank mounting recess 6 is formed. Has a through hole 29 formed therethrough.
The nutrient solution once supplied from the nutrient solution tank 1 into the tank mounting recess 6 is further supplied into the cultivation container 2 through the liquid passage hole 29 and the gap 27. In this state, as shown in FIG. 5 to FIG. 7, the liquid surface level H of the nutrient solution supplied into the cultivation container 2 and the inside of the tank attachment concave portion 6 becomes the same level.

The liquid surface level H of the nutrient solution supplied into the cultivation container 2 and the tank mounting recess 6 is determined by the injection pipe 2.
When the liquid 6 rises to a level (level) that closes the liquid inlet 26A at the lower end of the nut 6, the inflow of air into the nutrient solution tank 1 through the liquid injection pipe 26 is prevented, and the nutrient solution from the nutrient solution tank 1 The supply is stopped, the further increase of the liquid level H is regulated, and the liquid level H of the nutrient solution in the cultivation container 2 is controlled by absorption of the nutrient solution by the cultivated plant or evaporation of water in the nutrient solution. When the liquid begins to drop, the liquid injection port 26A of the liquid injection pipe 26 is opened, air is allowed to flow into the nutrient solution tank 1 through the liquid injection pipe 26, and the liquid flows from the nutrient solution tank 1 into the tank mounting recess 6. When the nutrient solution is supplied, the liquid surface level H of the nutrient solution rises again to a height (level) that closes the injection port 26A at the lower end of the injection tube 26.

That is, in a state where the nutrient solution can be supplied from the nutrient solution tank 1 into the cultivation container 2, the liquid surface level H of the nutrient solution in the cultivation container 2 and in the tank mounting recess 6 is determined. The liquid inlet 26A of the liquid inlet pipe 26 of the nutrient solution tank 1 attached to the second tank mounting recess 6 with the lid 23 facing downward.
Can be maintained at a height (level) that blocks the liquid, and the liquid level H of the nutrient solution that blocks the liquid inlet 26A of the liquid inlet pipe 26 becomes the set liquid level, and the liquid inlet 26A of the liquid inlet pipe 26 This constitutes the nutrient solution supply amount control means 19.

Also, by artificially adjusting the length of protrusion of the liquid injection tube 26 from the opening 25 of the cap 24,
The height of the injection port 26A of the injection tube 26 can be changed, whereby the set liquid level of the nutrient solution supplied into the cultivation container 2 can be changed and adjusted. In other words, the liquid level adjusting means 20 is constituted by the liquid injection pipe 26 inserted and held in the cap 24 so as to be able to move back and forth.

In the plant cultivator constructed as described above, as shown in FIG.
Until the root hairs of the cultivated plant P planted on the bottom extend through the large number of holes 9 formed in the bottom wall 4A of the floor material storage recess 4 of the cultivation frame 5. By adjusting the projecting length of the injection tube 26, the liquid surface level H of the nutrient solution supplied into the cultivation container 2 is immersed in the nutrient solution in the cultivation container 2 by the bottom wall 4A of the floor material storage recess 4. The liquid level is set to the set liquid level so that the nutrient solution permeates the floor soil 3 through the holes 9.

Further, as shown in FIG. 7, after the root hairs of the cultivated plant P have extended downward through the large number of holes 9 formed in the bottom wall 4A of the floor material storage recess 4 of the cultivation frame 5, In accordance with the growth of the root hair, the protrusion length of the liquid injection pipe 26 as the liquid level adjusting means 20 is adjusted, and the lower end of the root hair is supplied into the cultivation container 2 within a range where the lower end of the root hair is immersed in the nutrient solution. By lowering the set liquid level of the nutrient solution, a part of the root hair can be brought into direct contact with the air, and the growth of the cultivated plant P is promoted as compared to a state in which the entire root hair is immersed in the nutrient solution. Can be done.

A drainage hole 30 for nutrient solution is formed through the peripheral wall of the cultivation container 2, and a stopper 31 made of synthetic resin is detachably mounted in the drainage hole 30.

The nutrient solution stored in the nutrient solution tank 1 may be a nutrient solution that is commercially available at a horticultural store or the like and is dissolved in water, or a nutrient solution necessary for plant growth. It is only necessary to use a hand-made nutrient solution prepared by mixing and dissolving nutrients in water, and when growing a cultivated plant P from a seed, only water is used as a nutrient solution until the seed germinates. Is also good.

[Second Embodiment] FIG. 8 shows another embodiment of the holding portion 11 in the first embodiment. In the cultivation frame 5, an outer surface of a side wall 4B of the floor material storage recess 4 is provided. Is formed integrally with the upper cylindrical portion 11C in a vertical position over the peripheral flange 5A and the side wall 4B, and penetrates vertically in the vertical direction over the peripheral flange 5A and the upper cylindrical portion 11C. A support member insertion hole 11D is formed, and a bottomed support member insertion hole 11E is located at a position vertically opposed to the support member insertion hole 11D. The lower cylindrical portion 11F in the up and down posture in which the insertion hole 11E is formed is connected to the bottom 2B of the cultivation container 2 and the peripheral wall 2B.
It is formed integrally with the C inner surface side. The holding portion 11 has an upper cylindrical portion 11C in which the support member insertion hole 11D is formed, and the support member insertion hole 11E that allows the lower end of the support member 10 to be inserted and removed from the vertical direction. And a lower cylindrical portion 11F.
0 is inserted into the support member insertion hole 11D from above, and the lower end of the support member 10 is further inserted into the support member insertion hole 11E.
, The cultivation frame 5 and the cultivation container 2 can be integrally assembled with the support member 10, so that the shift movement between the cultivation frame 5 and the cultivation container 2 can be more effectively regulated. Can be.

The other configuration is the same as that of the first embodiment. Components having the same configuration or the same function as the components described in the first embodiment are denoted by the same reference numerals and description thereof is omitted. .

[Third Embodiment] FIG. 9 shows another embodiment of the strut member 10 and the holding portion 11 in the first embodiment. The holding portion 11 is used for a strut member formed on the cultivation frame 5. The insertion hole 11A and the engaging portion 11G formed on the bottom 2B of the cultivation container 2 whose lower end of the support member 10 is detachable from the vertical direction. Specifically, a spherical bulging portion 10A is integrally formed at the lower end of the support member 10, and the holding portion 11 is provided with a short portion of the floor material storage recess 4 of the peripheral flange 5A of the cultivation frame 5. A support member insertion hole 11A penetratingly formed in a portion located on both sides in the hand direction, and an engagement portion formed in a bottom portion 2B of a cultivation container 2 in which a bulging portion 10A of the support member 10 is detachable from a vertical direction. 11G. The support member insertion hole 11A
Is formed to be larger than the outer diameter of the bulging portion 10A.

The engaging piece 11G is elastically deformed outwardly from above the bulging portion 10A of the support member 10 in accordance with the pressing contact, and when the bulging portion 10A is pushed to a predetermined position, the engaging piece 11G engages. The elastic return of the joint piece 11G is allowed and the bulging portion 10A
, The upper part of the bulging part 10A is prevented from coming out freely, and the flange part 10B is fixedly fitted in the supporting member insertion hole 11A. Inadvertent escape of the member 10 can be restricted. In addition, a pair of plate-shaped projecting pieces 11H located on both sides of the engaging piece 11G is for restricting the displacement movement of the bulging portion 10A.

In the upper and lower middle portions of the support member 10, a flange portion 10B is fitted and fixed in the support member insertion hole 11A with the support member 10 protruding from the holding portion 11.
Is externally fixed. When the support member 10 is pulled out from the holding portion 11 with a certain operating force or more, the engaging piece 11G is elastically deformed outwardly with the operation, and the engagement between the bulging portion 10A and the engaging piece 11G is caused. Is canceled,
The flange portion 10B escapes from the support member insertion hole 11A, whereby the support member 10 can be removed from the holding portion 11.

The other structure is the same as that of the first embodiment. Components having the same structure or the same function as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted. .

[Fourth Embodiment] FIG. 11 shows a fourth embodiment of the plant cultivator of the present invention.
An opening / closing valve 33 with a cock 32 operable to open and close the flow path of the liquid injection pipe 26 is provided at a portion protruding from the cap 24. Therefore, when the nutrient solution tank 1 is mounted on the periphery of the opening of the tank mounting recess 6 with its lid 23 side facing downward,
The on-off valve 33 is closed in advance, and the opening / closing valve 33 is opened via the cock 32 at a position immediately before the on-off valve enters the tank mounting recess 6, so that nutrient solution is supplied to the fingers during the mounting operation. Adhesion can be suppressed.

The other components are the same as those of the first embodiment, and the same components or components having the same functions as the components described in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. .

[Other Embodiments] In each of the above embodiments, the floor soil is exemplified as the cultivation floor material 3 stored in the cultivation floor portion 4 formed in the cultivation frame 5. However, the present invention is not limited to this. Instead, rock fiber, sponge, sand or the like may be used as the cultivation floor material 3. The oxygen supply means 13 may be, for example, an electric water turbine that supplies oxygen to the nutrient solution by stirring the nutrient solution in the cultivation container 2 together with air on the liquid level. In each of the above embodiments, a solar cell for supplying power to an air pump serving as the oxygen supply means 13 may be provided. The cultivation container 2 is used as the nutrient solution supply amount adjusting means 19.
A liquid level sensor for detecting a liquid level of the supplied nutrient solution, and an on-off valve for opening and closing the flow path of the injection pipe 26 based on a signal from the liquid level sensor. It may consist of an adjusting device. In the above embodiments, the opening 25 of the cap 24
A liquid injection tube 26 made of an elastically deformable synthetic resin is inserted and held so as to be retractable, so that the nutrient solution can be supplied from the contact surface between the inner peripheral surface of the opening 25 of the cap 24 and the outer peripheral surface of the liquid injection tube 26. However, for example, a hard synthetic resin injection tube 26 is inserted through the opening 25 of the cap 24 so as to be able to move out and back, and is held.
An elastic seal member is provided between the inner peripheral surface of the opening 25 of the cap 24 and the outer peripheral surface of the liquid injection pipe 26 to prevent leakage of nutrient solution while allowing the liquid injection pipe 26 to move out and back. May be. The nutrient solution storage container 1 may be a synthetic resin nutrient bottle formed in a bottle shape. The outer peripheral edge of the cultivation frame 5 is placed on the periphery of the opening of the cultivation container 2 while covering the opening 2A of the cultivation container 2, and the cultivation frame 5 is detached from the opening 2A of the cultivation container 2. You may attach it freely.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a plant cultivator of the present invention.

FIG. 2 is a plan view showing a state in which a nutrient solution storage container is removed.

FIG. 3 is an enlarged sectional view showing a holding unit.

4A is a sectional view taken along line aa of FIG. 3, and FIG. 4B is a sectional view taken along line bb of FIG.

FIG. 5 is an enlarged sectional view of a main part in a state where a nutrient solution storage container is mounted on the mounting part.

FIG. 6 is a sectional view showing a use state.

FIG. 7 is a sectional view showing a use state.

FIG. 8 is an enlarged cross-sectional view illustrating a holding unit according to a second embodiment of the plant cultivator of the present invention.

FIG. 9 shows a third embodiment of the plant cultivator of the present invention,
(A) is an enlarged sectional view showing the holding portion, and (B) is a plan sectional view of the engagement piece.

FIG. 10 is an enlarged sectional view of a main part showing a third embodiment of the plant cultivator of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nutrient storage container (nutrient liquid tank) 2 Cultivation container 2A Opening 2B Bottom 3 Cultivation floor material 4 Cultivation floor 5 Cultivation frame 6 Attachment part 10 Support member 11 Holding part 11A Insert hole for support member 11G Engagement part 13 Oxygen supply means 14 Mounting part 19 Nutrient solution supply amount control means

Claims (3)

[Claims] 1. A cultivation frame body having a cultivation floor for accommodating a cultivation floor material is detachably attached to an opening of a cultivation container for receiving a nutrient solution supplied from a nutrient solution storage container. In the cultivation frame, a mounting portion for detachably attaching the nutrient solution storage container is formed, and a column member for a cultivated plant can be freely inserted and removed in a vertically opposed portion of the cultivation frame and the cultivation container. A plant cultivator having a holding portion for holding. 2. The cultivation frame has a mounting portion for oxygen supply means for supplying oxygen to the nutrient solution in the cultivation container, and the nutrient solution storage container has a nutrient solution in the cultivation container. The plant cultivator according to claim 1, further comprising a nutrient solution supply amount control means for maintaining the liquid level at the set liquid level. 3. The cultivation container according to claim 3, wherein the holding portion includes a support member insertion hole formed in the cultivation frame, and an engagement portion formed at a bottom portion of the cultivation container in which a lower end of the support member is vertically detachable. The plant cultivator according to claim 1, which is constituted by: