JPH0313853B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an artificial fish reef placed on the seabed,
Especially regarding artificial reefs that can be made larger.

(Prior Art) None of the conventional artificial reefs has achieved a remarkable effect on the collection effect, and various structures have been proposed as shown below.

For example, as a structure for building a large fish reef, (1) A combination of small units.

(2) Items that involve stacking small units or materials in random order.

There is.

In addition, the materials for the fish reef units are: (3) Those made only of concrete (steel may be used for joints, etc.);

(4) Constructed only of steel.

(5) Items made of materials other than (3) and (4) above, such as FRP.

(6) Items that use waste materials such as old tires.

There is.

Furthermore, to prevent entanglement in nets, (7) The structure of the main body of the fish reef has an arbitrary shape, and the outside is covered with a separate birdcage-shaped net frame, etc.

There is.

(Problems to be Solved by the Invention) Each of the conventional artificial reefs described above has the following problems.

(1) When using small units, there is a problem with the durability of the joints.

(2) In the case of overloading, the construction of fish reef aggregations becomes uncertain.

(3) If constructed only from concrete, the weight will increase as the size increases, making construction difficult.

(4) If it is made only of steel, it will be lightweight and there will be problems with stability.

(5) When using FRP etc., the material is expensive.

(6) When using waste materials, their use is prohibited due to environmental safety concerns.

(7) The birdcage-shaped "anti-netting frame" has a durability problem.

The present invention is an artificial fish reef that can be increased in size by using both steel and concrete materials in order to solve the various problems of the conventional art described above, and in particular, by providing a plurality of wall-shaped legs at the base. Therefore, it is an object of the present invention to provide an artificial fish reef that has a high trapping effect, is easy to install, and has good stability after installation.

(Means for Solving the Problems) The gist of the present invention is to provide a base portion placed on the seabed;
It consists of a cone shaped like a mesh basket and having an apex above, which is made of a steel frame fixed on the base, and the base has a pillar frame erected in the center and a lower part of the cone. It has a steel enclosing frame connected to the support frame, and concrete wall legs connecting the support frame and the enclosure frame, and the wall legs extend radially from the support frame to the enclosing frame. This is an artificial reef that is formed of a plurality of wall-like legs, and the wall surface of each wall-like leg is attached vertically.

Further, in the artificial reef, the wall-like leg portion is preferably formed of three pieces extending in three directions in a Y-shape.

(Function) The base section has a plurality of concrete wall-like legs, which allow the reef to fall vertically into the desired installation water area due to its weight and vertical wall surface, allowing accurate and easy installation. Afterwards, the fish reef is held stably, and the tidal current that collides with the wall of the wall-like leg section generates an upwelling current to promote the generation of food such as plankton. Further, the conical portion forms a habitat for fish inside and outside, and the conical shape prevents fish from getting caught in the net.

(Example) The present invention will be described below based on an example shown in FIGS. 1 to 4.

As shown in each figure, the artificial reef according to the present invention is
It consists of a base part 1 that is placed on the seabed, and a net cage-shaped cone part 2 that is integrally fixed onto the base part 1 and has an apex part above.

The base portion 1 has a plurality of concrete wall-like legs 3 that protrude radially in the radial direction and form a vertical wall surface. In this embodiment, three legs 3 are arranged in a Y-shape, and their inner sides are interconnected by, for example, a hexagonal plate 4. Further, the periphery of each leg 3 is covered with a steel frame 5, and the outer lower end portion 3a of each leg 3 protrudes slightly downward, making it easy to dig into the sea bed. .

On the other hand, the conical part 2 is made of a steel frame such as H-beam steel, and in this embodiment, it includes at least one support frame 6 erected from approximately the center of the base part 1, and this support frame 6. A circular ring-shaped surrounding frame 7 is fixed to the upper peripheral part of the base part 1 (in the embodiment, the steel frame 5) so as to surround it.
and the support frame 6 from this surrounding frame 7.
A plurality of inclined frames 8 are installed diagonally up to the top of the frame, a plurality of horizontal frames 9 are connected to each other adjacent inclined frames 8, and a plurality of horizontal frames 9 are installed between the support frame 6 and each inclined frame 8. It has a book transverse frame 10.

In this embodiment, the support frame 6 is made of three H-beams, and the lower part of the support frame 6 is fixed to the hexagonal plate 4 by welding or the like. Two flange plates 11 and 12 are provided at the top of each support frame 6.
are provided, and the upper part of the inclined frame 8 is fixed to the flange plates 11 and 12. That is,
The upper part of each inclined frame 8 is a lower flange plate 11
It passes through the side of the upper flange plate 12 and comes into contact with the lower surface of the upper flange plate 12, and is directly fixed to the flange plate 12 and connected to the flange plate 11 via a substantially triangular auxiliary plate 13.

Further, in this embodiment, an auxiliary inclined frame 14, which is shorter than the inclined frame 8, is installed diagonally from the surrounding frame 7 to a desired horizontal frame 9.

Furthermore, in this embodiment, the base portion 1 has a surrounding frame 15 made of steel around it, and the surrounding frame 15 is connected to the lower part of the surrounding frame 7, and the surrounding frame 7 of the conical portion 2 is connected to the surrounding frame 15. A plurality of ring-shaped horizontal frames 16 arranged substantially parallel to each other, and each horizontal frame member 16
and a plurality of vertical frame members 17 that connect the surrounding frame 7 together. The horizontal frame member 16 is fixed to the outside of the steel frame 5 of the leg portion 3, and the upper part of the steel frame 5 is connected by a steel member 18.

The artificial reef configured as described above is installed as a single reef on the seabed of a desired body of water. During this installation work, the leg portions 3 of the base portion 1 act as a conical member and a fletching member that allows vertical free fall into the water, so that it can be accurately and easily installed on the seabed of a desired body of water. Also, after installation on the seabed,
The tidal current collides with this leg 3 and generates an upwelling current, which activates the seawater and promotes the generation of plankton, which attracts various fish such as small fish and large fish that feed on it. . Furthermore, the conical part 2 made of a steel frame makes it easy for seaweed and shellfish to adhere to it, creating an environment suitable for fish to live in, and also makes it easier to catch fish gathered around it with a net. This is the shape to avoid.

Incidentally, light-shielding plates made of steel plates or the like may be installed at appropriate locations on the outer periphery of the cone portion 2 etc. to control the amount of light from the outside, thereby improving the habitability of the fish. good.

(Effects of the Invention) As described above, according to the present invention, since the reef is made as a single fish reef, it is possible to increase the size of the fish reef and to construct a fish reef at great depth. Furthermore, since the base is made of heavy concrete and the upper cone part is made of a light steel frame, it is stable, relatively inexpensive, and easy to construct. Furthermore, the structure does not harm the environment and can solve the problems of the prior art described above, such as preventing the cone portion from becoming intertwined.

In particular, the base is provided with concrete wall legs that form vertical wall surfaces extending radially in a Y-shape, etc., so that during installation, the wall legs are The artificial reef can be accurately and easily installed on the seabed of a desired body of water by acting as a conical member and a fletching member that freely falls vertically into the water. In addition, the artificial reef that was installed is
The tidal current that collides with the wall of the wall-like leg creates an upwelling current, which flows in and out of the cone formed at the top, which is a habitat for fish, and provides food for plankton and other food. Since it is possible to promote the development, it is a configuration with an extremely high concentration effect.

[Brief explanation of drawings]

FIG. 1 is a front elevational view of an artificial reef according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a cross-sectional view taken along the - line in FIG. FIG. 2 is a schematic perspective view of the main parts of FIG. 1; [Explanation of symbols], 1...base part, 2...cone part,
3...Legs, 3a...Protrusion, 4...Hexagonal plate, 5
... Steel frame, 6 ... Support frame, 7 ... Surrounding frame, 8 ... Inclined frame, 9 ... Horizontal frame, 10 ... Transverse frame, 11, 12 ... Flange plate, 13 ... Auxiliary plate, 14 ...Auxiliary inclined frame, 15...Encircling frame, 16...Horizontal frame material, 17
... Vertical frame material, 18 ... Steel frame member.

Claims (1)

[Scope of Claims] 1. Consisting of a base part that is placed on the seabed, and a pyramidal part that is shaped like a net cage and has an apex above, the base part is made of a steel frame fixed to the base part. has a pillar frame erected at the center, a steel enclosing frame connected to the lower part of the conical part, and a concrete wall-like leg part connecting the pillar frame and the enclosing frame. An artificial fish reef characterized in that the wall-like legs are formed of a plurality of pieces extending radially from the support frame toward the surrounding frame, and the wall surface of each wall-like leg is attached vertically. 2 The wall-like leg portion extends in three directions in a Y-shape.
The artificial reef according to claim 1, which is formed of a single sheet.