JPH0474982B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Application Field> The present invention involves passing a hydroponic solution through a pipe, letting the hydroponic solution flow out from a small hole provided around the pipe, and wrapping the end around the pipe. The present invention relates to a cloth bed type hydroponic cultivation device in which the hydroponic solution is allowed to flow down and permeate into a bag-shaped body attached to the bag to grow plants.

<Conventional technology> For plant growth, an appropriate amount of water, fertilizer,
and oxygen must be provided. Hydroponic cultivation is a method that has been studied and implemented in order to grow plants uniformly, quickly and favorably by appropriately adjusting these conditions. Conventionally used systems for absorbing liquid fertilizer include the following.

1 Roots are immersed in a large amount of liquid fertilizer tank.

-Liquid fertilizer can be absorbed through the roots, but since the supply of oxygen depends on dissolved oxygen in the water, the supply of oxygen is insufficient and there are problems with growth.

2. Liquid fertilizer is constantly flowing at the bottom of the gutter where the root tips are located.

- Oxygen is well supplied, but water and fertilizer can only be absorbed through the root tips.

3. Liquid fertilizer is poured or dripped into voids that serve as a liquid retainer and root support in place of soil.
(Use rock wool, gravel, etc.) - Oxygen, fertilizer, and water can be absorbed through the entire root, which is good for plant growth, but there are problems such as heavy labor and pollution when cleaning or disposing of accumulated salts at the end of cultivation. arise. In addition, substances such as rock wool that are leached into water have a negative impact on plants.

As can be seen from the above-mentioned current situation, it can be said that the ideal system for growing plants is one that can absorb plenty of air, water, and fertilizer through the entire root system. A fabric bed hydroponic system has been proposed as a system that approximates this ideal state. In this system, liquid fertilizer is constantly flowed down from the top of a bag-like body made of cloth along the inner surface of the bag-like body, and the entire root of the plant comes into contact with the inner wall surface of the bag-like body, absorbing the liquid fertilizer from the entire surface. At the same time, since the entire roots are in the air, they are supplied with sufficient oxygen, making it an ideal system for plant growth.

<Problems to be solved by the invention> Conventionally proposed cloth bed cultivation devices are
As shown in the figure, the cloth constituting the cloth floor part is held by the clamping member 1.
The cloth-like material was inserted in a state in which it hung down almost vertically to limit the root area and to provide some degree of liquid retention of the cloth-like material. A very important feature of this cloth bed method is that the roots can directly absorb an abundance of oxygen. However, since the fabric floor cloth hangs vertically, even if the body of the holding member 1 is enlarged into a via dal shape in order to increase the capacity of the root portion, the fabric floor section is not expanded, and the fabric floor sheet is The objects 5, 5 are brought into close contact with each other due to the surface tension of the water, resulting in a state in which the amount of free air is small, causing a problem in the supply of oxygen, which is the purpose of this system.

<Means for Solving the Problems> The present invention provides an inner frame body, such as a rod-shaped article or a band-shaped article 17, which is shaped along the cross-sectional shape of the inner side of the holding member 1 from the inside of the bag-like sheet-like article 5. This hydroponic cultivation apparatus is characterized in that the bag-like sheet material 5 is brought into close contact with the inner surface of the holding member 1, and the cavity of the bag-like body is constantly expanded.

Next, one embodiment of the device of the present invention will be described in detail based on the attached drawings. In FIG. 1, on the inner surface near both free ends of the upper end of the holding member 1, which has a U-shaped cross section and is made of water-impermeable synthetic resin or metal plate,
A sheet-like material 4 that forms recesses 3, 3 for holding the pipes 2, 2 for supplying hydroponic liquid and absorbs and holds the hydroponic liquid on the inner surface of the holding member 1, and a cloth from which the roots absorb the liquid from the surface. The floor sheet-like material 5 is stacked and folded in half, with the sheet-like material 5 on the inside and the sheet material 4 on the outside. The upper ends of the sheet-like materials 4 and 5 are sandwiched between the inner surface and the bag-like material 5.
The bag-like body 5 and the water retaining material 4 are brought into close contact with the inner surface of the holding member 1 by a plurality of expansion members 17 from the inner surface of the bag-like body to expand the internal cavity of the bag-like body and hold the holding member 1 in a vertical posture. Holders 6, 6 and 7
It is held and configured by The pipes 2, 2 are provided with a plurality of holes 8 near the upper ends of the sheet materials 4, 5, and the holding position of the holding member 1 is as shown in FIG. The holding members 1 are held by the respective holders 6 so as to be inclined in the length direction, and the holding members 1 are arranged in a plurality of rows in parallel as shown by the phantom line in FIG. 1 with the inclined lower end sides of the holding members 1 aligned.
A gutter-like body 9 is provided in an inclined manner on the inclined lower end side,
The inclined lower end of this gutter-like body 9 faces into the hydroponic liquid tank 10, and a pumping pipe 11 is provided between the hydroponic liquid tank 10 and the liquid supply pipes 2, 2. Communicate between the two. It is even more advantageous to insert a bypass 12 between the pump 11 and the supply pipes 2, 2 and to provide a volume regulating valve 14 between the branch point 13 of the bypass 12 and the supply pipes 2, 2. Furthermore, pump 11 and power supply 1
A 24-hour timer may be installed between 5 and the pump power may be turned on and off as appropriate.

In addition, 16 and 16 in the figure are sponge elastic bodies,
This is provided on the upper outer side of the opposing sheet-like materials 4, 4 and 5, 5, and is for tightly press-welding the upper portions of the sheet-like materials 5, 5. In this case, the liquid supply pipes 2, 2 and the sheet materials 4, 4 and 5,
A sheet-like material of sponge elastic material 16, 16 is placed between 5 and 5.
The liquid supply pipes 2, 2 may be placed facing each other at a short distance, and the sheet-like materials 5, 5 may be closely pressed together.

With plant seeds elastically sandwiched between the opposing sheet-like materials 4, 4 and 5, 5 that are pressed against the sponge elastic bodies 16, 16, water is pumped up from the hydroponic liquid tank 10 by the pump 11 to perform hydroponic cultivation. The liquid is supplied into the pipes 2,2. The hydroponic liquid in the pipes 2, 2 penetrates into the upper ends of the sheet materials 4, 4 and 5, 5 through the plurality of holes 8, and sequentially flows downward along the inner surfaces of the sheet materials 4, 4 and 5, 5. Penetrate. Then, the surplus hydroponic liquid reaches the bottom surface of the holding member 1, flows into the gutter-like body 9 due to its inclination, and is returned to the hydroponic liquid tank 10.

The features of the device of the present invention are as shown in FIG.
An inner frame body 17 is installed inside the cloth bag-like body 5 for pushing and expanding the cloth bag-like body 5 from inside along the shape of the holding member 1. This makes it possible to supply abundant air, or oxygen, to the roots.

The inner frame body used in the present invention, that is, the expansion material, can be made of any material that has shape retention properties, such as resin, metal, and wood. Further, the expansion member may be composed of a rod-like object with a round cross section, a band-like object with a flat cross-section, or another cross-sectional shape. Furthermore, the molded shape may be such that it extends almost all the way around the cross section of the holding member, or it may be such that only the upper part or only the lower part is expanded.

As described above in detail with reference to the drawings, the present invention allows the hydroponic liquid supplied from the hydroponic liquid supply pipes 2, 2 through the plurality of discharge ports 8 to be transferred between the outer peripheral surfaces of the pipes 2, 2 and the clamping member 1. The hydroponic solution is caused to flow down along the bag-like body 5 of the fabric bed sheet-like material whose upper end is held between the inner surfaces of the holding recesses 3, 3, and the roots of the plants are allowed to flow through the inner surface of the bag-like body in the air. In a fabric bed type hydroponic cultivation device in which plants grow by absorbing liquid and using the inside of the bag-like body as a root region,
The bag-like body 5 is characterized in that a plurality of inner frames 17 are installed inside the bag-like body 5 to keep the bag-like body expanded at all times. The surface tension of the water prevents too much oxygen in the root zone and prevents the stagnation of hydroponic fluid in the root zone, which enables an abundant supply of oxygen to the root zone and maintains healthy roots without rot. This led to the growth of plants.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of the apparatus of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a cross-sectional view of the main part thereof. Further, FIG. 4 is a cross-sectional view of a main part of an apparatus that does not employ the present invention.

Claims (1)

[Claims] 1 Hydroponic liquid is allowed to flow down along the bag-like body of the fabric bed sheet, and the roots of the plants absorb the liquid from the surface of the bag-like body in the air, and the plants grow using the inside of the bag-like body as a root zone. In the fabric bed type hydroponic cultivation apparatus, an inner frame body is installed inside the bag-like object to press the bag-like object from the inside against the holding member along the shape of the holding member covering the outside of the bag-like object. A hydroponic cultivation device characterized by: