JP3852679B2 - Method for manufacturing molded body for fishing ground facility - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molded body made of concrete or ceramic for fishing ground facilities suitable for fish reefs and breeding reefs for polychaetes, small crustaceans and fish.
[0002]
[Problems to be solved by the invention]
In recent years, fishing grounds have been improved in order to protect and cultivate marine resources at coastal fishing grounds. On the other hand, recycling of shells such as oysters has been required due to waste disposal problems. The oyster shells are recycled for use as fish reefs and breeding reefs.
[0003]
Examples of such fish reefs and breeding reefs using shells such as oysters are disclosed in, for example, JP-A-6-141727, JP-B-6-77493, and JP-A-7-236385. There is an artificial reef collection case as a breeding reef that fills the net with shells such as oysters and breeds polychaetes, small crustaceans, etc. in the gaps between the shells. In recent years, a reef block made of concrete and a reef frame body with a steel structure have been constructed, and an accommodation frame with shells fixed with mortar etc. is arranged on the upper side of the reef frame body to improve the function as a fish reef. Hybrid type artificial reefs are also used.
[0004]
As described above, various types of shellfish such as oysters have been proposed for fish reefs and breeding reefs, but disclosed in JP-A-6-141727, JP-B-6-77493, JP-A-7-236385, and the like. The artificial fish reef collection case is a structure that simply fills the water-permeable case with oyster shells, so it lacks weight, and if it is installed in a sea area where the tide is fast or where there is a lot of waves, it will be washed away early. It is difficult to keep it installed continuously. In addition, a structure that is installed in the sea as a structure of a predetermined size in advance cannot be applied to other uses for fishing ground facilities and is inferior in versatility. These reefs and breeding reefs are made of concrete and steel frames. Therefore, there is a problem that it is inconvenient to carry due to a certain size and weight, and also has a high cost due to its complicated structure.
[0005]
The present invention has been made based on the above problems, and can be used for recycling shells such as oysters, and is suitable for various uses for fishing ground facilities with a simple structure, particularly for fishing reefs and breeding reefs. and to provide a manufacturing how the strength superior fisheries facilities for molding.
[0006]
[Means for Solving the Problems]
A method for manufacturing a molded body for a fishing ground facility according to claim 1 of the present invention is a method of forming an inner cylinder formed in a hollow shape with concrete and having a water permeability so as to surround the inner cylinder. A shell is filled between the mold and the inner cylinder, and a paste-like solidifying agent is sprayed on the shell to cover the outer periphery of the inner cylinder, and the shell is on the surface side. It was molded so as to appear in
[0007]
As a result, complex irregularities due to shells are formed on the surface of the hollow molded body, and a large number of cavities are formed in the gaps between the shells. , Breeding small crustaceans, etc., and useful fish that prey on them can be effectively collected around the compact. Furthermore, since the molded body is formed by covering the outer peripheral edge of the hollow inner cylindrical body with an outer cylindrical body using a shell as an aggregate, it is possible to easily form a molded body having a complicated uneven portion due to the shell on the surface. Can be molded.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The molded body 1 for a fishing ground facility according to the present embodiment has a multiple structure including a hollow inner cylinder 2 and an outer cylinder 3 covering the outer peripheral edge of the inner cylinder 2. The inner cylinder 2 is formed in a hollow shape from concrete. The outer cylinder 3 has a shell 4 as an aggregate and is joined by concrete 5 to expose a large number of shells 4 on the surface of the outer cylinder 3 to form irregularities 6, and a number of cavities are formed in the gaps of the shell 4. Part 7 is formed. Since the hollow portions 7 between the shells 4 are not regular in arrangement, shape, size, etc., the hollow portions 7 have a complicated and complicated labyrinth shape, and seaweeds are settled, polychaetes, small shells. It has become easy to breed.
[0009]
The hollow molded body 1 as described above is first prepared by mixing an ordinary method, that is, a general sand, gravel, etc., cement, various compounding agents as an aggregate, and then a concrete mold (illustrated). No) is formed, and the hollow inner cylinder 2 is formed. Then, as shown in FIG. 2, a mold 10 having a larger diameter than the inner cylinder 2 is disposed on the outer peripheral edge of the inner cylinder 2. This mold 10 is formed of a metal net and has water permeability. Between the inner cylinder 2 and the mold 10, an oyster shell 4 is filled as an aggregate, and a solidifying agent is formed from the outside of the mold 10. Spray concrete paste P as follows. By solidifying the concrete paste P, the outer peripheral edge of the inner cylindrical body 2 is covered with the outer cylindrical body 3 so that the inner cylindrical body 2 and the outer cylindrical body 3 are integrated. As a result, the molded body 1 is formed with an outer cylindrical body 3 in which many shells 4 are exposed to form uneven portions 6 on the surface, and a large number of cavities 7 are formed by gaps between the shells 4. However, the inner cylinder 2 positioned inside is formed by a method in which concrete is filled in a general concrete formwork, and the outer cylinder 3 having the shell 4 as an aggregate is formed on the inner cylinder 2. Therefore, formation of the molded body 1 is easy. Further, the outer peripheral edge of the inner tube 2 is covered with an outer tube 3 made of a shell 4 and concrete as an aggregate so that the shell 4 is exposed on the surface of the molded body 1, and seaweeds are also formed on the surface of the molded body 1. It can grow and grow polychaetes, small crustaceans, etc., and is particularly excellent in functions as a fish reef and breeding reef.
[0010]
Next, the utilization method of the molded object 1 for fishery facilities of a present Example is demonstrated. The molded body 1 for a fishing ground facility according to the present embodiment can be used as a fish reef or a breeding reef by being laid on the seabed at an appropriate depth. Since this molded body 1 has a hollow cylindrical shape, when a tidal current comes into contact with a fish reef / growth reef in which a plurality of the molded bodies 1 are stacked, a complex swirl region is formed by radiating in various directions, and the current S is weakened. It will be. Further, a complex uneven portion 6 is formed on the front and back surfaces of the molded body 1 by the shell 4, and the inside of the uneven portion 6 is further complicated and complicated by a hollow portion 7 formed inside. Therefore, it becomes an environment suitable for the habitat of polychaetes, small crustaceans, etc., and these proliferate. In addition, large brown algae such as hondawala, arame, and scallop that grow on the seabed of the open sea, etc. grow on the molded body 1. As a result, larvae and immature fishes of useful fish such as mabals, Thailand, flounder, and sharks that use these as feeds are gathered around them, and larvae and immature fish of these useful fishes can be grown. These make it suitable for the inhabiting of fish and the like.
[0011]
Such a molded body 1 for a fishing ground facility according to the present embodiment is not only inexpensive because it has a simple configuration, but it is only necessary to stack the molded body 1 to a desired height on the seabed, so that the seabed is flat. It is not necessary and there are few restrictions on the installation location, improving versatility. Further, the molded body 1 has a multiple structure in which the inner cylinder 2 molded by a normal method is molded and the outer peripheral edge thereof is covered with the outer cylinder 3 using the shell 4 as an aggregate. The concrete strength can be increased. Thereby, durability of the molded object 1 improves and the function as a fish reef or a breeding reef can be stably maintained over a long term.
[0012]
Further, as shown in FIG. 3, a shelf frame 15 or the like having a plurality of storage frames 15A is made of a shape steel such as H-shaped steel, and the molded body 1 is stored in the storage frame 15A of the shelf frame 15 to obtain a desired shape. Large fish reefs and breeding reefs can be easily manufactured. Furthermore, as shown in FIG. 4, it is possible to obtain a fish reef / breeding reef by alternately stacking the molded bodies 1 vertically and horizontally via spacer blocks 16. As described above, the molded body 1 for a fishing ground facility according to the present embodiment can be used not only as a fish reef and a breeding reef, but also as a fish reef and a breeding reef. It can be used as an artificial fish reef of a desired size by being arranged on the 15 or the spacer block 16 or the like.
[0013]
As described above in detail, the molded body 1 of the present embodiment is provided with a hollow inner cylinder 2 and the outer periphery of the inner cylinder 2 is an outer cylinder 3 made of concrete or ceramic with a shell 4 as an aggregate. Since the hollow molded body 1 having the concavo-convex portion 6 formed by the shell 4 on the surface is formed, seaweeds are grown on the surface of the molded body 1, and polychaetes, small crustaceans, etc. are propagated. It is easy to grow and can grow fish and functions as a fish reef and breeding reef. In addition, because it can be combined with the shelf frame 15 and the spacer block 16 to make various sizes of reefs and breeding reefs, it is possible to easily manufacture reefs of sizes according to the installation location, making it versatile. Are better. In addition, as shown in FIG. 5, the concrete molded body 1 is piled up on the seabed 21 to form a mount 22, so that the upwelling flow S <b> 1 is artificially generated, and the sunlight reaches the nutrient salt on the seabed. The water depth can be increased to 20-30 m to increase the basic productivity of the sea area by activating the growth of phytoplankton. Furthermore, the upwelling flow S1 is likely to occur by stacking the hollow cylindrical shaped bodies 1 in a mountain shape. In particular, since the molded body 1 of the present embodiment uses the shell 4 as an aggregate, calcium and other trace amounts of various minerals are eluted from the shell 4, so that the fish reef and breeding reef, or the mount fish reef as a whole, can grow fish. It is particularly suitable and has little influence on the environment.
[0014]
Furthermore, the manufacturing method of the molded body 1 of the present invention is to mold the inner cylinder 2 formed in a hollow shape with concrete and to provide a cylindrical mold 10 having water permeability so as to surround the inner cylinder 2. The shell 10 is filled between the mold 10 and the inner cylinder, and the shell 4 is sprayed with a paste-like solidifying agent to cover the outer peripheral edge of the inner cylinder 2. 4 is formed so as to appear on the surface side, and therefore, a complex uneven portion 6 due to the shell 4 is formed on the outer peripheral edge of the molded body 1, and a large number of hollow portions 7 are formed in the gaps between the shells 4. The formed body 1 becomes porous, and seaweeds grow, polychaetes, small crustaceans, etc. proliferate, and useful fish that prey on them are collected around the molded body 1 effectively. Can be made. Further, the molded body 1 is formed by forming the inner cylinder 2 molded by a normal method and forming a multiple structure in which the outer peripheral edge thereof is covered with the outer cylinder 3 using the shell 4 as an aggregate. Is easy to mold.
[0015]
As mentioned above, although this invention was demonstrated based on each said Example, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above embodiment, the case of a concrete molded body has been described as an example, but the case of ceramic can also be applied by mixing and firing shellfish 4 in the same manner. Furthermore, it is applicable not only to concrete but also to mortar or cement paste. Furthermore, it may be applied to gypsum. Moreover, in the said Example, although the case of the cylindrical molded object was demonstrated, square cylinder shape, polygonal cylinder shape, etc. may be sufficient. Furthermore, it is needless to say that the shell used as the aggregate need not be oysters, and can be applied to shells other than oysters such as scallops and pearl oysters.
[0016]
【The invention's effect】
The method for manufacturing a molded body for a fishing ground facility according to claim 1 of the present invention is characterized in that the manufacturing method includes forming an inner cylinder formed in a hollow shape with concrete and providing water permeability so as to surround the inner cylinder. A cylindrical mold is provided, a shell is filled between the mold and the inner cylinder, and a paste-like solidifying agent is sprayed on the shell to cover the outer periphery of the inner cylinder. Since the shell is molded so that it appears on the surface side, complex irregularities due to the shell are formed on the surface of the hollow molded body, and moreover, many cavities are formed in the gaps between the shells. It becomes porous, and seaweeds grow, polychaetes, small crustaceans, etc. breed, and useful fish that prey on them can be effectively collected around the compact. Furthermore, the molded body can be easily molded by forming a multi-layer structure in which the outer peripheral edge of the hollow inner cylindrical body is covered with an outer cylindrical body using a shell as an aggregate.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view of a molded body showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a method for producing the molded body.
FIG. 3 is a schematic explanatory view showing a method for using the molded body.
FIG. 4 is a schematic explanatory view showing another method of using the molded body.
FIG. 5 is a schematic explanatory view showing a case where the molded body is used as a mount fish reef.
[Explanation of symbols]
1 Molded body (fishery facility molded body)
2 Inner cylinder 3 Outer cylinder 4 Seashell 5 Concrete 6 Concavity and convexity 7 Cavity
10 formwork
22 Mount Reef P Concrete paste (solidifying agent)

Claims (1)

An inner cylinder formed into a hollow shape with concrete is molded, and a cylindrical mold having water permeability is provided so as to surround the inner cylinder, and a shell is filled between the mold and the inner cylinder. And manufacturing a molded body for a fishing ground facility, wherein an outer cylinder covering the outer peripheral edge of the inner cylinder by spraying a paste-like solidifying agent on the shell is molded so that the shell appears on the surface side. Method.

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