JPH0139187Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Technical field of the invention This invention relates to an artificial fish reef that is installed on the seabed to exhibit the effect of attracting fish. This invention relates to artificial reefs that do not require grading the ground or selecting the sea area for installation.

(2) Prior Art and Problems Conventionally, artificial reefs have been installed on the ocean floor by sinking reef bodies made of concrete or the like into the ocean floor. In this case, the fish reef body is pre-formed on land in a certain shape so that when it is sunk on the seabed, it can be used alone or when several reef bodies overlap to form a space that can serve as a refuge for fish. has been done. Therefore, the above-mentioned fish reef body has the disadvantage that it is large in both volume and weight, making it difficult to transport. Furthermore, since the topography of the ocean floor is not necessarily flat, installing an artificial reef in a desired sea area requires preparation such as grading the ground so that the artificial reef can be stably installed. The disadvantage is that installation costs are high because it is necessary to select suitable terrain for installation.

(3) Purpose of the invention The present invention was made to solve the above problems, and is easy to transport to the installation location.
The purpose of the present invention is to provide an artificial fish reef that does not require grading the seabed or selecting a sea area for installation at the time of installation.

(4) Structure of the invention According to the invention, the above object is to have a plurality of bases connected to each other so as to be rotatable, and to be installed by bending at the connecting parts of the bases according to the topography of the seabed. This is achieved by providing an artificial reef characterized by:

(5) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail based on the attached drawings.

FIG. 1 is an explanatory diagram showing an artificial reef according to the present invention. The fish reef body 1 is a structure in which a plurality of bases 2, 2... are connected to each other so as to be rotatable.
An artificial reef is formed by installing the artificial reef in such a way that it is bent appropriately at the location where there is such a thing and is adapted to the topography of the seabed 3. As shown in FIGS. 2a and 2b, the base 2 is made of concrete, synthetic resin, etc., and has a flat plate-like main body 5 that is elongated and rectangular in plan view, with a window 6 formed therein, and anchors on two sides of the upper and lower ends. Mooring hook 7
A connecting portion 8 is formed on each side adjacent to another base 2 to be connected to this base 2. The window portion 6 is for increasing the sinking speed when sinking the fish reef body 1 and further reducing the drag force due to water current or wave force after installation.
A suitable number of holes have been opened. This window portion 6 is connected to the main body 5
It may not be necessary to provide it if the weight of the device is heavy. The anchor mooring hook 7 is used to connect an anchor 9 (described later) to improve stability after installation, and is fixed to the main body 5 by embedding an iron bar bent into a hook shape into the side wall of the main body 5. ing.
This anchor mooring hook 7, like the window portion 6 described above, is provided as necessary, and may not be provided when the main body 5 is heavy. The connecting portion 8 is
This is for connecting the bases 2, 2 so that they can rotate with each other, and an eye bolt-shaped connecting rod is embedded in the side wall of the base 2. When the connecting parts 8 are connected to each other by a connecting tool 10 described later,
It protrudes to a length that allows the bases 2, 2 to be folded at the connecting portion.

The base plates 2, 2, . . . formed in this manner are sequentially connected laterally, as shown in FIG. That is, as shown in FIG. 4, after the holes 11 of the connecting parts 8, 8 of the two substrates 2, 2 to be connected are overlapped, they are connected by a connecting tool 10 such as a shackle or iron wire, and the The reef body 1 shown in FIG. 1 is formed.

FIGS. 5a and 5b are explanatory diagrams showing other modifications of the base 2. FIG. In this modification, the connecting portion 8 of the base 2 shown in FIG. 2 is formed integrally with the base 2. That is, an appropriate number of protrusions are formed on the side of the base 2 adjacent to the other base 2, and holes 11' are formed in these protrusions in parallel with the side of the base 2 adjacent to the other base 2. The connecting portion 8' is formed by drilling. At this time, each of the protruding pieces can fit into the gap between the protruding pieces formed on one side and connect the bases 2 of the same shape sequentially so as to mesh with each other. It is located in
As shown in FIG. 6, the bases 2, 2, . . . are sequentially connected by a bolt and nut connector 10.

Although the base plate 2 shown in FIGS. 2 and 5 is shown as having a flat plate shape, the present invention is not limited to this, and the base plate 2 may have an appropriate shape such as a chevron shape or a wave shape.

Next, a method for installing an artificial reef of the present invention using the above-mentioned reef body 1 will be explained. As shown in FIG. 7, the fish reef body 1 is loaded onto the work boat 12 in a folded state. After transporting them to the installation area, they will be dropped into the sea one after another, starting with the last base 2. As shown in Fig. 1, the fish reef body 1 that has sunk to the seabed 3 has its bases 2 rotatably connected to each other. It will be installed in a shape that adapts to the topography of Seabed 3. In this case, if the installation of the reef body 1 is unstable, as shown in Fig. 8, anchors 9 such as cross anchors or Danforth anchors shown in Fig. 9, or mooring boats can be moored to the anchor mooring hook 7 described above. It may be stabilized by In addition, if the seabed 3 in the installation sea area is flat due to sandy soil, etc., as shown in FIG. The fish reef body 1 may be installed three-dimensionally.

FIG. 11 is an explanatory diagram showing a second embodiment of the present invention. In this embodiment, artificial or natural seaweed or seaweed gametes, spores, and buds are attached to the substrate 2 in the first embodiment using, for example, an adhesive. In this case, as shown in FIGS. 12a and 12b, a recess 15 is formed in the center of the base 2.
By forming the recess 15 and attaching the seaweed 14 to the recess 15, it is possible to prevent the seaweed 14 from being damaged even when the fish reef body 1 is folded. In this embodiment, in addition to the fish reef effect, it can also function as a seaweed bed.

FIG. 13 is an explanatory diagram showing a third embodiment of the present invention. In this embodiment, the base 2 in the first embodiment described above is covered with a seed holding material 16 such as a seed net. This seed-retaining material 16 is made by attaching seaweed eggs, zoospores, etc. to a net-like material, and culturing the attached eggs, zoospores, etc. until they become young buds.
As shown in the figure, a fish reef body 1 connecting the base 2 is shown.
It is formed slightly narrower and longer than the width of. This type of holding material 16 is fixed at appropriate locations on the base 2.

Next, a method for installing an artificial reef according to the third embodiment will be explained. First, the reef body 1 is formed by interconnecting the bases 2 on land. At this time, the first
As shown in FIG. 4, a buoy 17 is attached to the reef body 1 to provide appropriate buoyancy. Next, after fixing the seed retaining material 16 to the surface of this fish reef body 1,
It is towed by the work boat 12 to the sea area where the artificial reef will be installed. When the installation area is reached, the buoy 17 attached to the fish reef body 1 is separated by an appropriate means, and the fish reef body 1 is lowered to the seabed 3. After this, if necessary, the reef body 1 may be stabilized on the seabed 3 by the anchor 9 as shown in FIG. Artificial reefs are formed by installing artificial reefs.
The method of installing the artificial reef according to this third embodiment is not limited to the method described above. For example, as shown in FIG. 1, after forming the artificial reef, a diver etc. The seed retaining material 16 may be fixed.

In the third embodiment, the gametes or buds of the seaweed attached to the seed retaining material 16 grow reliably, so it is possible to provide a fish habitat that serves as both a fish reef and a seaweed bed. Further, since the base 2 has a flat surface on which the seed retaining material 16 is attached, the seed retaining material 16 has good adhesion to the base 2 and will not fall off due to ocean currents or the like. Furthermore, since the fish reef body 1 is arranged linearly in the longitudinal direction in plan view, it is easy to fix the seed retaining material 16, which has almost the same shape in plan view, to the base 2 of the fish reef body 1 at appropriate locations. It is possible to establish large-scale fish reefs and seaweed beds. Furthermore, as shown in FIG. 10, when the seed retaining material 16 is attached to the fish reef body 1 installed three-dimensionally, the sand of the seabed 3 covers the seed retaining material 16 and the gametes of seaweed etc. can be prevented from dying.

(6) Effects of the invention Since the present invention is constructed as described above, by making the reef body 1 mutually rotatable, it can be easily transported without taking up much space. In addition, since each of the bases 2 can be bent to each other, it can be installed in a shape that adapts to the topography of the seabed 3, and there is no need to level the seabed 3 or select the installation area at the time of installation, and it is possible to create an artificial fish reef. can be installed in desired sea areas. Furthermore, when artificial or natural seaweed or seaweed gametes, spores, and buds are attached to the substrate 2, it can function as a seaweed bed in addition to the fish reef effect. Furthermore, if the above-mentioned substrate is covered with a seed-retaining material to which seaweed gametes or buds are attached, an artificial reef that has both a fish reef effect and a seaweed bed function can be more reliably obtained. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention;
FIG. 2 is an explanatory diagram showing the base, FIG. 3 is an explanatory diagram showing the connected state of the base, FIG. 4 is an enlarged view of a portion of FIG. 3, and FIG. 5 is an explanatory diagram showing another modification of the base. FIG. 6 is an explanatory diagram showing the connected state of the base of the above modification, FIG. 7 is an explanatory diagram showing the method of installing an artificial reef,
Fig. 8 is an explanatory diagram showing a state in which an artificial reef is stabilized using an anchor, Fig. 9 is an explanatory diagram showing a Danforth anchor, Fig. 10 is an explanatory diagram showing another installation example, and Fig. 11 is an explanatory diagram showing a state in which an artificial reef is stabilized using an anchor. An explanatory diagram showing a second embodiment of the present invention, FIG. 12 is an explanatory diagram showing a modification of the base 2 in the second embodiment, FIG. 13 is an explanatory diagram showing a third embodiment of the present invention, FIG. 14 is an explanatory diagram showing a method of installing an artificial reef according to the third embodiment. DESCRIPTION OF SYMBOLS 1... Reef body, 2... Base, 3... Seabed, 8... Connecting part, 10... Connector, 11... Hole, 14... Seaweed, 1
6...Seed retention material.

Claims (1)

[Claims for Utility Model Registration] 1. An artificial fish reef characterized by being formed by connecting a plurality of bases so as to be rotatable with each other, and being installed by bending at the connecting part of the bases according to the topography of the seabed. . 2. The artificial reef according to claim 1, which is a utility model, and is characterized in that artificial or natural seaweed or gametes, spores, and buds of seaweed are attached to the base. 3. The artificial reef according to claim 1, wherein the base is covered with a seed retaining material to which gametes, spores, or buds of seaweed are attached.