JPH0335890B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an artificial reef installed in the sea or freshwater for collecting fish.

[Conventional technology]

Conventional artificial reefs include square concrete blocks, old tires, and abandoned buses dumped into the sea.

[Problem that the invention seeks to solve]

However, since these conventional fish reefs are heavy, they are difficult to move once they are installed.As a result, they are often unable to respond to deteriorating environmental conditions in the ocean area, making it impossible to select the optimal reef location. It is also difficult to respond quickly to changes in the environment. In addition, a large work boat is required for transportation and installation, making these operations large-scale and expensive.

Furthermore, not only when old tires and abandoned buses are used, but even when rectangular concrete blocks are used, the shape is limited, so it is difficult to obtain a complex three-dimensional fish reef, and a large fish reef effect cannot be expected.

Furthermore, since the fish reef itself does not have the means to catch fish, there is a limit to the amount of fish that can be caught.

Therefore, as seen in Japanese Utility Model Application Publication No. 58-113357, for example, there are some systems that provide a weight adjustment chamber in the reef body so that the weight of the reef body can be adjusted arbitrarily, making it easier to install and move. , this fruit was developed in 1978.
Since the model No. 113357 requires a separate air chamber to be attached to the reef structure as a weight adjustment device, it requires installation space for the air chamber, which increases the overall size of the reef, making it difficult to use it as a reef. I can't plan it enough.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
Reefs can be made lighter, easier to move and install, have a greater effect on fish collection, and increase the amount of fish caught.In addition, the optimal reef shape for each species, the selection of suitable locations in certain sea areas, and the ecology of The purpose of the present invention is to provide an artificial reef that can be used for research on fish reefs such as surveys.

[Means for solving problems]

In order to achieve the above object, the present invention forms a frame by connecting rectangular vertical walls made of lightweight material such as plastic and having a window in the center with columnar hollow connecting members. The frames are combined to constitute a reef body, the hollow part of the connecting member is used as a weight adjustment chamber, and a water injection and draining pipe arranged along the frame is connected to the weight adjustment chamber to constitute a weight adjustment device. The gist of this is that

[Effect]

According to the present invention, since the reef body is made of lightweight material such as plastic, it can be made into a complex shape, making it easy for fish to gather.In addition, the weight adjustment device makes the reef heavy when it is sunk, making it difficult to transport and install. Being lightweight makes these tasks easier and allows for easy movement to the optimal reef location.

In this case, since the weight adjustment device utilizes the connecting member constituting the reef body as a part thereof, no separate space is required for arranging the weight adjustment device.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an overall perspective view of the artificial reef of the present invention, and FIG.
The figure is a perspective view of the weight adjustment device, which is the main part of the same as above, and 1 in the figure.
is made of lightweight material such as plastic, with window 1 in the center.
2 is a columnar connecting member that is made of a heavy material such as concrete and connects the wall 1 to each other, and the connecting member 2 is formed hollow inside, and this hollow portion The weight adjustment chamber 3 constitutes a part of the weight adjustment device. Also, 4 in the figure
Reference numeral 5 indicates an inlet/outlet pipe which also constitutes the weight adjustment device, and 5 indicates a branch pipe of the inlet/outlet pipe 4.

To assemble the reef body using such members, the three walls 1 are made vertical and are connected to each other via the connecting member 2, and the triangular prism-shaped frame 11 thus formed is attached to one side of the wall 1. The wall body 1 and the connecting member 2 are shared and successively connected, and the whole structure is hexagonal in plan, and the upper layer is one size smaller than the other.

The water supply and drainage pipe 4 is located at the center of the top of the fish reef main body A which has a truss shape and is opened in the vertical direction.
After connecting the lower ends of the pipes 5 and branching from there, branch pipes 5 are first arranged radially along the upper surface of the upper wall 1, and then connected to the upper end of the weight adjustment chamber 3 formed in the upper connecting member 2. Connecting. Then, a branch pipe 5 is further connected to the lower end of this weight adjustment chamber 3, and after the upper surface of the lower wall 1 is attached, the lower connecting member 2
It communicates with a weight adjustment chamber 3 formed in .

A feeding device 6 is attached to the upper end of the water supply pipe 4,
A fish collecting device 7 is provided below the water supply pipe 4 and near the fish reef body A.

Further, in the figure, 8 indicates a capture net large enough to envelop the fish reef body A, 9 indicates a breeding net for seaweed disposed within the fish reef body A as shown in FIG. 3, and 10 indicates an anchor.

Next, to explain how to install such an artificial reef in the sea, as shown in Figures 4a and 4b,
First, the water in the weight adjustment chamber 3 is drained using the water filling pipe 4 and the branch pipe 5 to reduce the weight of the reef body A.
The fish reef main body A is moved by a work boat 11 to a place where it is placed on the sea surface while floating on the sea surface. This work boat 11 has a fish reef main body A floating on the sea surface, so
A small one will suffice.

Then, a capture net 8 is laid on the seabed at the sinking location,
Water is injected into the water supply pipe 4 to supply water into the branch pipe 4 and the weight adjustment chamber 3, thereby increasing the weight of the fish reef main body A, allowing it to naturally sink into the sea, and then being placed on the fishing net 8. At this time, the upper end of the water supply and drainage pipe 4 is installed so as to be located on the sea surface, and the anchor 10 is used as necessary.

The fish reef main body A sunk in the seabed in this way becomes a suitable habitat for fish by the action of the fish collection device 7 and the feed supplied from the feeding device 6 on the sea surface, and seaweed grows in the breeding net 9.

To pull up the reef body A, as shown in Fig. 4c, the water in the weight adjustment chamber 3 is drained using the water supply pipe 4 and the branch pipe 5, which reduces the weight of the reef body A, and its buoyancy allows it to float on the sea. surface and float.

Then, in the same manner as described above, the work boat 11 is used to move it to a new location, or replace it with a new one.

Next, the fish and shellfish that lived on the submerged fish reef body A,
To explain the method of capturing seaweed, etc., this is done at the same time as the above-mentioned pulling up of the fish reef body A. As shown in FIGS. The rope 12 is attached to the end of a capture net 8, and when the fish reef body A is pulled up, the rope 12 is also lifted so that the capture net 8 wraps around the reef body A, and the capture net 8 is pulled up together with the fish reef body A.

When the fishing is completed, the fish reef main body A is pulled out from the fishing net 8, moved to another location, and the opening of the fishing net 8 is closed. You can capture them all.

Note that the shape of the fish reef body A is not limited to this embodiment, and the shape that is most suitable for the species and age of the fish may be determined as appropriate.

〔Effect of the invention〕

As described above, since the artificial fish reef of the present invention is made of lightweight materials such as plastic, it is easy to process and assemble, and it is possible to create large and complex combinations, thereby obtaining the optimal shape depending on the species of fish. be able to.
Furthermore, the weight of the fish reef can be arbitrarily adjusted to make it lighter or heavier, making installation work easier. In this case, since the weight adjustment device utilizes the hollow portion of the connecting member constituting the reef body, there is no need for a separate installation space for the weight adjustment device, and the reef can be fully utilized. Furthermore, since they can be floated on the sea, they can move freely, and the optimal reef position can be selected according to environmental conditions, making it easy to deal with environmental deterioration. Moreover, since a small work boat is sufficient for moving and installing, the cost required for this is also low.

Furthermore, when pulling up a fish reef, all the fish living there can be captured at once, so a large catch can be expected.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing an embodiment of the artificial fish reef of the present invention, Fig. 2 is a perspective view of the weight adjustment device which is the main part of the same, Fig. 3 is a perspective view of the growth network of the same marine algae,
FIGS. 4a, 4b, and 4c are explanatory diagrams showing the installed state, and FIGS. 5a, 5b, and 5c are explanatory diagrams showing the captured state. 1...Wall, 1a...Window, 11...Frame, 2...
...Connecting member, 3... Weight adjustment chamber, 4... Inlet/drain pipe, 5... Branch piping, 6... Feeding device, 7... Fish collecting device, 8... Capture net, 9... Breeding net, 10... …
Anchor, 11...Work boat, 12...Rope, A
...The main body of the fish reef.

Claims (1)

[Claims] 1 Rectangular vertical walls made of lightweight material such as plastic and having a window in the center are interconnected with column-shaped hollow connecting members to form a frame, and the frames are combined to form a fish reef body. An artificial reef comprising: a hollow portion of the connecting member serving as a weight adjustment chamber; and a weight adjustment device being constructed by connecting an inlet/outlet pipe disposed along the frame to the weight adjustment chamber.