JP2003092951A - Article for artificial fish bank and method of production for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method easily producing an article comprising concrete which uses shells of oyster as aggregates. SOLUTION: This method produces a hollow cylindrical inside body 2. A porous box is mounted on the periphery of the inside body 2, shells 4 is filled as the aggregate between the box and the inside body 2, and then concrete paste P is sprayed to form an outer cylindrical body 3. The outer cylindrical body 3 covers the periphery of the inside body 2 and integrated with the inside body 2 to form a hollow article 1. A complicated corrugated part 6 is formed on the surface of the article 1 by the shells 4, and seaweeds adhere and polychaeta, small Crustacea family or the like proliferate in cavities formed between spaces of the shells 4, and useful fishes prey on them effectively gather around the molded article 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article made of concrete or ceramic for fishery facilities suitable for fish reefs and breeding reefs for polychaetes, small crustaceans and fish.

[0002]

In recent years, fishing grounds have been developed in order to protect and nurture fishery resources in coastal fishing grounds. On the other hand, due to the problem of waste disposal, shellfish such as oysters have been lost. Recycling has been required, and oyster shells are being recycled and used as fish reefs and breeding reefs.

An example of using a shell such as an oyster for such a fish reef / propagation reef is disclosed in, for example, JP-A-6-14172.
No. 7, JP-B-6-77493 and JP-A-7-2363.
As disclosed in Japanese Patent Publication No. 85, etc., there is a fish-collecting case for an artificial fish reef as a reef that fills a net with shells such as oysters and breeds polychaetes, small crustaceans, etc. in the gaps between the shells. In recent years, a fish reef block made of concrete and a fish reef frame body with a steel frame structure are arranged, and a storage frame with shells fixed with mortar or the like is arranged above the fish reef frame body to improve the function as a fish reef. Hybrid type artificial fish reefs are also used.

As described above, various types of fish reefs / propagation reefs using shells such as oysters have been proposed, but JP-A-6-141727, JP-B-6-77493, and JP-A-7-236385 have been proposed. The artificial fish reef fish collection case disclosed in, for example, has a structure that is simply filled with oyster shells in a water-permeable case, so its weight is insufficient, and if it is installed in a sea area with fast tidal currents or large sea waves, It is washed away and it is difficult to install it continuously. In addition, a structure that is installed in advance in the sea as a structure with a predetermined size cannot be applied to other uses for fishing grounds and is inferior in versatility. Since it is composed of the above-mentioned components, it has a certain size and weight and is inconvenient to be transported. Further, the structure is complicated, and the cost is high.

The present invention has been made based on the above-mentioned problems, and it is possible to recycle and use shells such as oysters,
It is an object of the present invention to provide a molded body made of concrete or ceramic for a fishing ground facility which has a simple structure and is suitable for various uses for fishing ground facilities, particularly for fishing reefs and breeding reefs, and which is excellent in strength.

[0006]

The molded article for fishing ground facility according to claim 1 of the present invention is provided with a hollow inner cylindrical body, and the outer peripheral edge of the inner cylindrical body is concrete or ceramic using a shell as an aggregate. And a hollow molded body having a concavo-convex portion formed by the shell on the surface.

Thus, by forming the molded body with the inner cylindrical body and the outer cylindrical body, it is easy to mold the molded body and
Complex irregularities due to shells are formed on the surface of the molded body,
Seaweed is easy to grow. In addition, since a complicated intricate cavity is formed in the gap between the shells and polychaetes, small crustaceans, etc. breed, useful fish that prey on these can be effectively collected around the molded body.

Further, the molded article for a fishing ground facility according to claim 2 is the molded article according to claim 1, wherein the inner cylindrical body is molded from concrete.

As a result, the affinity between the reinforcing inner cylinder and the outer cylinder having the irregularities on the surface can be enhanced, and the inner cylinder and the outer cylinder can be firmly integrated.

Further, the molded article for fishing ground facility according to claim 3 is the molded article for fishing ground facility according to claim 1 or 2, wherein the use of the molded body for fishing ground facility is a mount fish reef, so that the water depth is 80 to The seabed height of about 100m is 10-2
If a mountain-like structure having a width of 40 to 50 m and a length of about 0 m is laid down so as to have a length of several tens to several hundreds of meters, artificial upwelling tends to occur artificially.

Further, the molded article for fishing ground facility according to claim 4 is the molded article for fishing ground facility according to claim 1 or 2, wherein the use of the molded article for fishing ground facility is fish reef or breeding reef, and a plurality of combinations are used. Is used.

[0012] As a result, by forming a shelf frame made of metal or the like and mounting it on the shelf frame, it is possible to make fish reefs of various sizes. It can be manufactured and has excellent versatility.

According to a fifth aspect of the present invention, there is provided a method for manufacturing a molded article for a fishing ground facility, in which a hollow inner cylinder is formed of concrete and the inner cylinder is surrounded by a water-permeable cylinder. A mold is provided, a shell is filled between the mold and the inner cylinder, and an outer cylinder that covers the outer peripheral edge of the inner cylinder by spraying a paste-like solidifying agent on the shell,
The shell is formed so that it appears on the surface side.

As a result, complex irregularities due to the 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, so that the shell becomes porous and seaweeds grow. It is possible to effectively collect the useful fishes that prey on the molded body by breeding dwarf hairs and small crustaceans. Further, since the molded body is formed by covering the outer peripheral edge of the hollow inner cylindrical body with the outer cylindrical body using the 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. It can be molded.

[0015]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. The fishing ground facility molding 1 of the present embodiment has a multiple structure including a hollow inner cylinder 2 and an outer cylinder 3 that covers the outer peripheral edge of the inner cylinder 2. The inner cylinder 2 is made of concrete and is hollow. When the outer shell 3 is joined with concrete 5 using the shell 4 as an aggregate, a large number of shells 4 are exposed on the surface of the outer shell 3 to form irregularities 6, and a large number of cavities are formed in the gaps of the shell 4. The part 7 is formed. The cavity 7 between each shell 4
Has no regularity in arrangement, shape, size, etc., so that the cavity 7 becomes a complicated labyrinth-like shape, and it is easy for seaweeds to grow and polychaetes, small crustaceans, etc. to proliferate. ing.

The hollow molded body 1 as described above is first prepared by a conventional method, that is, after mixing sand, gravel, etc., which are generally used as aggregates, cement, and various compounding agents and stirring the mixture, concrete molds are prepared. It is filled in a frame (not shown) to mold the hollow inner cylinder body 2. Then, as shown in FIG. 2, a mold 10 having a diameter larger than that of the inner cylinder 2 is arranged on the outer peripheral edge of the inner cylinder 2. The mold 10 is made of a metal net and has water permeability, and an oyster shell 4 is filled as an aggregate between the inner cylinder 2 and the mold 10 to solidify from the outside of the mold 10. As a concrete paste P is sprayed. By solidifying the concrete paste P, the outer peripheral edge of the inner cylindrical body 2 is covered with the outer cylindrical body 3 to integrate the inner cylindrical body 2 and the outer cylindrical body 3. As a result, in the molded body 1, many shells 4 are exposed on the surface of the molded body 1 to form the concave-convex portions 6, and the outer cylindrical body 3 in which a large number of hollow portions 7 are formed due to the gaps of the shells 4 is formed. However, the inner cylindrical body 2 located inside thereof is molded by a method of filling a general concrete formwork with concrete, and the outer cylindrical body 3 having the shell 4 as an aggregate is molded on the inner cylindrical body 2. Therefore, it is easy to form the molded body 1. Further, by covering the outer peripheral edge of the inner tubular tube 2 with an outer tubular body 3 made of concrete and a shell 4 as aggregate, the shell 4 is exposed on the surface of the molded body 1, and seaweeds are also exposed on the surface of the molded body 1. It can settle and multiply polychaetes, small crustaceans, etc., and is particularly excellent as a fish reef / propagation reef.

Next, a method of using the molded product 1 for fishing ground facilities of this embodiment will be described. Molded article 1 for fishing ground facility of this example
It can be used as a fish reef or a reef by submerging it at a suitable depth. Since this molded body 1 has a hollow cylindrical shape, a fish reef formed by stacking a plurality of this molded body 1
When the tidal current comes into contact with the reef, it radiates in various directions to form a complicated vortex region and weakens the tidal current S. Further, on the front surface and the back surface of the molded body 1, a complicated uneven portion 6 is formed by the shell 4, and the inside of the uneven portion 6 has a complicated labyrinth shape due to the cavity portion 7 formed inside. As a result, it becomes an environment suitable for inhabiting polychaetes, small crustaceans, etc., and these proliferate. In addition, large brown algae such as Honda straw, Arame, and Kajime grow on the molded body 1 and grow on the bottom of the open sea. As a result, juveniles and juveniles of useful fish such as rockfish, Thailand, flounder, and linseed that use these as baits are collected around, and juveniles and juveniles of these useful fish can be raised. These make them suitable for habitation of fish and the like.

The molded body 1 for a fishing ground facility of this embodiment
Has a simple structure, it is not only inexpensive, but also because the molded bodies 1 only need to be stacked on the seabed to the desired height, there is no need for the seabed to be flat, there are no restrictions on the installation location, and versatility is improved. It has been done. In addition, the molded body 1 has a multiple structure in which the inner cylindrical body 2 molded by a usual method is molded and the outer peripheral edge thereof is covered with the outer cylindrical body 3 using the shell 4 as an aggregate. The concrete strength can be increased. Thereby, the durability of the molded body 1 is improved, and the function as a fish reef or a breeding reef can be stably maintained for a long period of time.

Further, as shown in FIG. 3, a shelf frame 15 having a plurality of storage frames 15A is made of steel such as H-shaped steel, and the molded body 1 is stored in the storage frame 15A of the shelf frame 15. Therefore, it is possible to easily produce a fish reef / propagation reef of a desired size. Further, as shown in FIG. 4, it is also possible to stack the molded bodies 1 alternately in the vertical and horizontal directions via the spacer blocks 16 to form a fish reef / proliferation reef. in this way,
The fishing ground facility molding 1 of this embodiment can be stacked not only as fish reef / propagation reef, but also as fish reef / propagation reef by arranging each independently, and further, it can be used as a shelf frame 15 or a spacer block. It can be placed in 16 or the like and used as an artificial fish reef of a desired size.

As described above in detail, the molded body 1 of this embodiment
Is provided with a hollow inner cylindrical body 2, and the outer peripheral edge of the inner cylindrical body 2 is covered with an outer cylindrical body 3 made of concrete or ceramic with the shell 4 as an aggregate, and the uneven portion 6 due to the shell 4 is formed on the surface. Since the hollow molded body 1 having the molded body 1 is molded, it is easy for seaweeds to grow on the surface of the molded body 1 and for polychaetes, small crustaceans, etc. to propagate, and fish can grow.・ Function as a breeding reef. In addition, since it can be combined with the shelf frame 15 and the spacer block 16 to form fish reefs and breeding reefs of various sizes, it is possible to easily manufacture fish reefs of a size suitable for the installation location, and to provide versatility. Are better. Moreover, as shown in FIG. 5, by stacking the concrete molded bodies 1 on the seabed 21 in a mountain shape to form the mount 22, an artificial upwelling S1 is artificially generated, and the nutrient salts on the seabed reach the sun rays. It is possible to increase the water depth to 20 to 30 m to activate the growth of phytoplankton and increase the basal productivity of the sea area. Further, the upwelling flow S1 is easily caused 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, a small amount of various minerals such as calcium are eluted from the shell 4, so that a fish reef / propagation reef or a mount fish reef as a whole can grow fish. It is particularly suitable and has almost no effect on the environment.

Further, the method for producing the molded body 1 of the present invention is as follows.
A hollow inner cylinder 2 made of concrete is formed, and a cylindrical mold 10 having water permeability is provided so as to surround the inner cylinder 2, and a space between the mold 10 and the inner cylinder is provided. The outer shell 3 is filled with a shell 4, and a paste-like solidifying agent is sprayed on the shell 4 to cover the outer peripheral edge of the inner shell 2.
Since the shell 4 is molded so that it appears on the surface side, a complicated uneven portion 6 is formed by the shell 4 on the outer peripheral edge of the molded body 1, and a large number of gaps are formed in the spaces between the shells 4. Since the hollow portion 7 is formed in the molded body 1, the molded body 1 becomes porous, and seaweeds grow, polychaetes, small crustaceans and the like grow, and useful fish that prey on this grow around the molded body 1. It can be effectively collected. Further, the molded body 1 has a multiple structure in which the inner cylindrical body 2 molded by a normal method is molded and the outer peripheral edge of the molded body 1 is covered with the outer cylindrical body 3 using the shell 4 as an aggregate. Is also easy to mold.

Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, in the above-mentioned embodiment, the case of a concrete molded body has been described as an example, but the same can be applied to the case of ceramics by similarly mixing and burning four shellfish. Furthermore, it is applicable not only to concrete but also to mortar or cement paste. Furthermore, it may be applied to gypsum. Further, in the above-mentioned embodiment, the case of the cylindrical shaped body has been described, but the shape may be a square tubular shape, a polygonal tubular shape, or the like. Further, it is needless to say that the shell used as the aggregate does not have to be an oyster, and can be applied to shellfish other than oysters such as scallops and pearl oysters.

[0023]

The molded body for a fishing ground facility according to claim 1 of the present invention is provided with a hollow inner cylindrical body, and the outer peripheral edge of the inner cylindrical body is an outer cylinder made of concrete or ceramic having shells as aggregates. A hollow molded body is formed by covering with a body and having the irregularities formed by the shells on the surface. For this reason, seaweeds grow on the surface of the molded body, polychaetes, small crustaceans, etc. propagate, and useful fish that prey on this can be effectively collected around the molded body.

Further, the molded article for fishing ground facility according to claim 2 is the molded article for fishing ground facility according to claim 1, wherein the inner cylindrical body is molded with concrete, and therefore the inner cylindrical body for reinforcement and the surface are uneven. The affinity with the outer cylindrical body having the portion can be enhanced, and the inner cylindrical body and the outer cylindrical body can be firmly integrated.

Further, the molded article for a fishing ground facility according to claim 3 is the molded article for a fishing ground facility according to claim 1 or 2, wherein the use of the molded body for a fishing ground facility is a mount fish reef, so that the water depth is 80 to The seabed height of about 100m is 10-2
If a mountain-like structure with a width of 40 to 50 m and a length of 0 m is sunk to form a length of several tens of meters to several hundreds of meters, an upwelling will artificially occur and nutrient salts on the seabed will be removed. It can be raised to 20 to 30 m where sunlight can reach to activate the growth of phytoplankton and enhance the basic productivity of the sea area.

The molded article for fishing ground facility according to claim 4 is the molded article for fishing ground facility according to claim 1 or 2, wherein the use of the molded article for fishing ground facility is fish reef or breeding reef, and a plurality of combinations are used. Since it is used as a fish reef, it is possible to form fish reefs of various sizes by forming a shelf frame of metal etc. and mounting it on this, so it is easy to create fish reefs of a size suitable for the installation location. It can be manufactured in a variety of ways and has excellent versatility.

According to a fifth aspect of the present invention, there is provided a method for manufacturing a molded article for a fishing ground facility, in which a hollow inner cylinder is formed of concrete and the inner cylinder is surrounded by a water-permeable cylinder. A mold is provided, a shell is filled between the mold and the inner cylinder, and an outer cylinder that covers the outer peripheral edge of the inner cylinder by spraying a paste-like solidifying agent on the shell,
Since the shell is molded so as to appear on the surface side, a complicated uneven portion due to the shell is formed on the surface of the hollow molded body, and further, since many cavities are formed in the gaps between the shells. It becomes porous, and seaweeds grow and polychaetes, small crustaceans, etc. propagate, and useful fish that prey on them can be effectively collected around the molded body. Furthermore, the molded body has a multiple structure in which the outer peripheral edge of the hollow inner cylindrical body is covered with the outer cylindrical body that uses the shell as the aggregate, so that the molding of the molded body is easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a molded body according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a method for manufacturing the same molded body.

FIG. 3 is a schematic explanatory view showing a method of using the above molded body.

FIG. 4 is a schematic explanatory view showing another method of using the above molded article.

FIG. 5 is a schematic explanatory view showing a case where the above molded body is used as a mount fish reef.

[Explanation of symbols]

1 Molded body (molded body for fishing ground facility) 2 Inner cylinder 3 outer cylinder 4 shells 5 concrete 6 uneven parts 7 Cavity 10 formwork 22 Mount Fish Reef P Concrete paste (solidifying agent)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B28B 21/72 B28B 21/72 (72) Inventor Hideo Nakamura 3-2- Higashimita, Tama-ku, Kawasaki-shi, Kanagawa 3F term (reference) 2B003 AA01 BB05 DD01 DD02 DD08 4G052 AB24 AB30 AB45 4G053 AA17 BC02 CA04 EA30 EA43 EB03 4G058 AA01 AB01 AC11

Claims (5)

[Claims] 1. A hollow structure having a hollow inner cylindrical body, the outer peripheral edge of which is covered with an outer cylindrical body made of concrete or ceramic having shells as an aggregate, and the surface of which has irregularities formed by the shells. A molded body for a fishing ground facility, which is formed by molding the above molded body. 2. The molded body for a fishing ground facility according to claim 1, wherein the inner cylinder is molded of concrete. 3. The molded article for a fishing ground facility according to claim 1, wherein the molded body for a fishing ground facility is used as a mount fish reef. 4. The molded product for a fishing ground facility according to claim 1, wherein the molded product for a fishing ground facility is used as a fish reef or a reproductive reef, and a plurality of combinations are used. 5. A hollow inner cylinder made of concrete is molded, and a cylindrical mold having water permeability is provided so as to surround the inner cylinder, and the mold and the inner cylinder are connected to each other. A fishing ground facility characterized in that a shell is filled between the shells, and an outer cylindrical body that covers the outer peripheral edge of the inner cylindrical body by spraying a paste-like solidifying agent on the shells is formed so that the shells appear on the surface side. For producing a molded product for automobiles.