JP2002369638A - Artificial fish shelter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial fish shelter produced by effectively utilizing wood resources as the material for artificial fish shelter. SOLUTION: The artificial fish shelter contains formed blocks 1 produced by solidifying charcoal with a binder and a frame 4 to hold the formed blocks filled in the frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial reef used to form a good fishing ground when installed underwater.

[0002]

2. Description of the Related Art Artificial reef technology has a long history of installing a shaped object (artificial reef) on the water floor to obtain a good fishing ground. In the old days, stone, wood, ring were used as artificial reefs. Since 1954, when the creation of fishing grounds with artificial reefs was promoted as a national business, various artificial and reef-based reefs, including plastic, old tires, steel, etc. Artificial reefs have been devised. In particular, recently, many local governments have been trying to use wood, especially thinned wood as artificial reef material.

[0003] The use of thinned wood for artificial reefs is a major problem. In addition to effective use of the thinned wood, it is necessary to use wood for breeding microorganisms that feed on fish and seaweeds such as scallop. It is expected that this will help create a more efficient artificial reef. In addition, artificial reefs made from thinned timber reduce the supply of nutrient-rich sediment including humus generated in mountain forests to the sea due to the installation of dams in many rivers. It can also help to improve the situation that it is inhibiting.

[0004]

As described above, the use of wood, particularly thinned wood, as artificial reef material can be expected to have many effects. However, there are still some things that do not use thinned wood directly for artificial reefs. For example, it takes time before microorganisms and seaweeds can use useful components contained in wood, which delays the creation of good fishing grounds. In terms of the problem of thinned wood, it is also important to promote the industry in mountainous areas. However, in this regard, the direct use of thinned wood for artificial reefs is insufficient.

[0005] The present invention has been made from such a viewpoint, and it is an object of the present invention to provide an artificial reef that enables more effective use of wood resources as artificial reef material.

[0006]

According to the present invention, there is provided an artificial reef comprising a molded block obtained by solidifying charcoal with a binder, and a frame for filling and holding the molded block. .

Further, in the present invention, using such artificial reefs, use of charcoal crushed into granules, use of charcoal obtained from thinned wood, use of cement as a binder, formation of a frame body by wood material, The use of thinned wood as a wood material, the formation of a molded block in a columnar shape with through holes, that the molded block contains rice hulls, and that the molded block contains porous mineral grains It is a preferable requirement that any one or a combination of these is further added.

[0008]

Embodiments of the present invention will be described below. FIG. 1 shows the appearance of a charcoal molding block according to an embodiment of the present invention. The charcoal molding block 1 is formed in a columnar shape having an axial through hole 2 at the center as an overall shape. The block shape in which the through-hole 2 is provided as in this example is preferable because the specific surface area can be increased in appearance, and the through-hole 2 provides advantages such as providing a favorable environment for growing small fish and the like. In addition to the examples shown in the drawings, various shapes such as a prism and a trapezoid can be adopted. Also, a shape without a through hole may be used.

On the other hand, the composition of the charcoal molding block 1 is mainly charcoal, and if necessary, an appropriate additive is added thereto, and these are solidified with a binder. As the charcoal, charcoal crushed into granules is used because it is suitable for being molded with a binder. The size of the charcoal grains is, for example, 0 (powder) to 5 m centering on 2 to 3 mm.
m, or 5-10 mm centered on 7-8 mm,
It is preferable to use a mixture of these two types of size distribution.

[0010] The type of charcoal is not particularly limited, and besides charcoal obtained by firing ordinary wood, bamboo charcoal obtained by firing bamboo can also be used. However, more preferably, charcoal made from thinned wood is used. This leads to effective use of thinned wood. At the same time, not only utilizing thinned wood, but also firing the thinned wood, it can also contribute to industrial promotion in the area where the thinned wood is produced.

As an example of the additive, a granulating material for porosity and a nutritional additive are used. Preferred examples of the porous material include rice husks, porous soil materials and mineral particles. In particular, the rice hull has a function of preventing the phenomenon called uneven rock, which tends to occur when mixing the granular materials in the hopper, that is, the phenomenon of uneven distribution of the particle size, in addition to the function of making porous, and can be said to be a preferable additive. . Examples of the porous soil material include calcium silicate-based granules, Akadama, Kanuma soil, and the like, which are commercially available, for example, under the trade name “TBX”.

[0012] The addition of nutritional additives has the purpose of providing an initial source of nutrients for the microorganisms underlying the ecosystem. Typical examples of such a substance suitable for such a purpose include alginsan, which is a polysaccharide contained in seaweed, and quinsan, which activates the metabolism of living organisms. Algin sun and quensen are usually powders, and are dissolved in water, soaked in charcoal or the like, or added in such a manner as to be applied.

There are inorganic and organic binders.
Inorganic materials include cement, gypsum, water glass, etc.
Examples of the organic type include a starch paste, a synthetic resin adhesive, and a lignin adhesive. Cement is the best in terms of ease of use and cost, and is usually used.

FIG. 2 shows an example of an artificial fishing reef using the charcoal molding block as described above. The artificial reef 3 has a configuration in which a charcoal molding block 1 is filled and held at random or in an aligned state at an appropriate interval inside a frame 4 formed in a box shape. The frame 4 is preferably formed in a box shape by assembling appropriate rod-shaped members in a lattice shape, and may be formed as a molded body of concrete or synthetic resin material. A wood material, a synthetic resin material, a steel material, or the like can be used for the rod-shaped material. A more preferable example is to use a wood material. In particular, it is preferable to use the thinned wood in a log state because it is effectively used.

Such artificial reefs 3 are used by being installed in appropriate numbers on the sea floor at appropriate intervals, similarly to conventional general artificial reefs. And since the artificial reef 3 uses the charcoal molding block 1 obtained by solidifying charcoal with a binder as a shaped product for a reef, it works to form an ecosystem as a good fishing ground in a shorter time and more abundantly. . It can have several effects. For example, charcoal contains major nutrient salts such as potassium and phosphorus as ash. The nutrient salts in this ash form are available directly to aquatic organisms, so to speak, and provide better initial conditions for the formation of good fishing grounds. In addition, since charcoal is porous and highly biophilic, spores of seaweed, eggs of shellfish, and the like are easily settled, which also provides better initial conditions for forming a good fishing ground. Charcoal also has the property of accumulating nutrients and the like in seawater due to its adsorptive properties, which also helps to enrich the ecosystem.

[0016] In addition to the above-described action peculiar to charcoal, the action of adding granulation material for porous material and nutrient additives also contributes to the formation of a good fishing ground. That is, the porous material provides a porous structure with pores that are larger than that of charcoal, and this porous structure, combined with the porous structure of charcoal, assists in the rich formation of ecosystems. Nutritional additives also provide an initial source of nutrients for the microbes that underlie the ecosystem, which also helps to create an ecosystem for better fishing grounds in less time.

[0017]

According to the present invention as described above, wood resources are carbonized and used as artificial reef materials.
In addition to the same effect as when using wood such as thinned wood as artificial fishing reef material, it is possible to provide useful ingredients contained in wood to underwater organisms in a more accessible form,
It can give better initial conditions to the formation of good fishing grounds,
Therefore, there is an effect that it is possible to form a more efficient reef. In addition, since the timber resources such as thinned timber are accompanied by value-added processing, it can be expected to contribute to the industrial promotion of timber producing areas.

[Brief description of the drawings]

FIG. 1 is an external view of a charcoal molding block according to one embodiment.

FIG. 2 is a schematic external view of an artificial reef according to one embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Charcoal molding block 2 Through hole 3 Artificial reef 4 Frame

Claims (9)

[Claims] 1. An artificial reef comprising a molded block obtained by solidifying charcoal with a binder, and a frame for filling and holding the molded block. 2. The artificial reef according to claim 1, wherein charcoal crushed into granules is used. 3. The artificial reef according to claim 1, wherein charcoal obtained from thinned wood is used. 4. The artificial reef according to claim 1, wherein cement is used as a binder. 5. The artificial reef according to claim 1, wherein the frame is made of wood. 6. The artificial reef according to claim 5, wherein a thinned wood is used as the wood material. 7. The artificial reef according to claim 1, wherein the molded block is formed in a columnar shape with a through hole. 8. The artificial reef according to claim 1, wherein the molded body block includes rice hulls. 9. The artificial reef according to claim 1, wherein the molded body block contains porous mineral grains.