JPH0415013Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a block for a floating artificial reef.

[Conventional technology]

With the decline in deep-sea fishing in Japan's fishing industry, an artificial reef block 1 as shown in FIG. 5, for example, has been used in the past in order to improve and develop Japan's coastal fishing grounds and promote coastal fishing. and,
A large number of such artificial reef blocks 1 are thrown into the sea and sunk to form an artificial reef fishing area, and then,
It is caught by pole-and-line fishing, gillnets, longlines, etc.

[Problems with conventional technology]

By the way, when fishing is carried out by net fishing using a bottom trawl net, a boat seine, etc. in such an artificial reef, as shown in FIG. easy fishing net 2
There were cases where the was damaged. In addition, since the conventional artificial reef block 1 is entirely made of concrete blocks, the shape and size are already determined at the time of molding. There was a problem in that it was necessary to prepare various blocks of different sizes.

Therefore, the technical problem of the present invention is that even when fishing is carried out by net fishing using fishing nets, especially bottom trawl nets, boat seines, etc., the fishing nets do not get caught, and the problem is that even when fishing is carried out using fishing nets, especially bottom trawl nets, boat seine nets, etc. It is an object of the present invention to provide a block for artificial reefs that can appropriately respond to these conditions.

[Technical means and actions for solving problems]

In order to achieve this purpose, the present invention consists of a base and a flexible dome-shaped floating member attached to cover the top surface of the base, and the floating member is made up of two pieces. An artificial reef fishing ground is formed by sinking a floating artificial reef block consisting of a bag made of a film and light material or air packed into the bag into the seabed.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

Figures 1 to 4 show an embodiment of the present invention, and this floating artificial fish reef block 3 is attached to a disc-shaped concrete base 4 and to cover the top surface of this base 4. It is composed of a dome-shaped floating member 5 having a flexible structure. As shown in FIG. 2, this floating member 5 consists of a bag 6 made of two membranes made of a rubber sheet, plastic film, etc., and a light material 7 stuffed into this bag 6. Compressed air is also filled in to maintain the dome shape. In addition, the bag 6 is
Its lower end is removably fixed along the periphery of the upper surface of the base 4 by a connecting means such as a hook, and apertures 8 are provided in several places so that fish can be placed inside the floating member 5. It is designed so that people can enter it.

Various floating members 5 having different shapes and sizes can be obtained depending on the shape and size of the bag 6 or the amount of light material 7 packed therein. This floating member 5
When the floating artificial reef block 3 is sunk on the seabed, the light material 7 packed inside resists the water pressure, so as long as the light material 7 is not deformed or destroyed. The performance as a float is not impaired, and a decrease in buoyancy due to volumetric deformation is prevented. In addition, use under high water pressure can be handled by increasing the filling rate of the light material 7, and stable buoyancy can be ensured. As the light material 7, for example, plastic foam such as urethane or styrene is desirable. In addition, when using a hygroscopic light material, it can be used by coating its surroundings with a waterproof material. In addition, the floating member 5
The bag 6 may contain only the light material 7, or may contain air together with the light material 7 as described above, or may contain only air instead of the light material 7. It may be something that has been done. Furthermore, the floating member 5 may be provided with openings so that fish can enter therein as described above.

When the floating artificial reef block 3 having such a configuration is to be sunk on the seabed, all that is required is to fix the floating member 5 on the base 4, then gently insert it from the ship and sink it to the seabed. When on the seabed, as shown in FIG. 3, the base 4 is installed on the seabed, and the floating member 5 is held in a dome shape by buoyancy. As a result, fish gather around and inside the floating artificial reef block 3 and spawn on the surface and inner surface of the floating member 5. In addition, this floating artificial reef block 3
Even if the fishing net 2 gets caught on the floating member 5 when using a bottom trawl net or a boat seine at an artificial reef fishing ground using an artificial reef, the floating member 5 itself is dome-shaped and the As shown, floating member 5
Since it has flexibility, it can bend in the direction in which the fishing net 2 is pulled, so the fishing net 2 will not easily come off and be damaged. Moreover, since the floating member 5 returns to its original position as soon as it is removed from the fishing net 2, its function as a fish reef is never impaired. In addition, when forming an optimal artificial reef fishing ground according to the water depth, this can be easily done by simply changing the height and size of the floating member 5.

〔effect〕

As explained above, in the floating artificial reef block according to the present invention, since the base and the floating member attached to the base are constructed as separate members, it is possible to use the floating artificial reef block during manufacturing and transportation to the artificial reef fishing grounds. The floating members are easy to handle, and once they have been sunk on the seabed, they can easily bend when they come into contact with obstacles, making them ideal for use with bottom trawl nets and boat seine nets in artificial reef fishing. Not only can it be used, but it has never caused damage to fishing nets. Furthermore, after the obstacle is removed, the reef immediately returns to its original position, so its function as an artificial reef is never impaired. Furthermore, with the floating artificial reef block according to the present invention, its height and size can be changed according to the depth of water to the seabed, so that it can easily be adapted to the formation of an optimal artificial reef fishing ground.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional explanatory diagram showing an embodiment of a block for a floating artificial fish reef according to the present invention, Fig. 2 is an enlarged view of section A in Fig. 1, and Fig. 3 is an explanatory cross-sectional view showing an embodiment of a block for a floating artificial fish reef according to this embodiment. FIG. 4 is a cross-sectional view showing a state in which a fishing net is caught on the floating artificial reef block according to this embodiment, and FIG. 5 is a conventional artificial reef block. It is a perspective view showing an example. 1... Block for artificial fish reef, 3... Block for floating type artificial fish reef, 4... Base, 5... Floating member.

Claims (1)

[Scope of utility model registration request] A bag consisting of a base and a flexible dome-shaped floating member attached to cover the upper surface of the base, the floating member being made of two membranes;
A floating artificial reef block comprising a light material or air packed into the bag.