JPS6238533Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to an artificial fishing reef made of reinforced concrete blocks that was created mainly for the purpose of spawning squid, which approaches the coast in the spring and hangs on a nearly horizontal flat surface. To provide an artificial reef for spawning porpoise squid that adapts to the habits of porpoise squid that have spawned in this way.

The feature of this invention is that the main block body is formed by integrally forming a cruciform beam block with drainage holes along the center line of each side of the block on the lower side of a rectangular flat block. This main block body is stacked in multiple stages with the flat block facing upward, and vertical column blocks are placed at the ends of the cross-shaped beam block and placed on each side of the flat block. Each main block body is fixed to form a rectangular drainable space on all sides of each tier.It is a combination of multiple tiers of main blocks that are fixed to each other to form a rectangular drainable space on all sides of each tier, and each space of the multiple tiers has a wide flat surface for spawning. It consists in having a part.

Next, an embodiment based on the above characteristics will be described with reference to the accompanying drawings.

A main block body 3 is formed by integrally providing cross-shaped beam blocks 2 on the lower surface of a large rectangular flat block 1 along the center line of each side of the block 1.

The length of the cruciform beam block 2 is that of the flat block 1.
The beam block 2 is formed in the same manner as the beam block 2, and drainage holes 4 are provided on each side of the beam block 2.

While stacking a plurality of main block bodies 3,
Column blocks 5 are installed vertically at the side ends of the beam blocks 2 on all sides of the stacked main block bodies 3, and the beam blocks 2 of each main block body 3 are attached to the column blocks 5.
Attach 6.

The fastening is carried out by appropriate means, but bolts 6a embedded in the four ends of each main block body 3 are used.
In the figure, each is inserted into the column block 5 and tightened with a nut 6b.

In the figure, 7 is a side wall provided on both sides of the beam block 2 in the longitudinal direction, and 8 is a hanging fitting provided at the upper end of each column block 5. The number of main blocks 3 to be stacked is preferably 4 to 10, but it goes without saying that numbers other than this may also be used.

The artificial fishing reef A of this invention, which is made up of a plurality of stacked main blocks 3 connected by several pillar blocks 5, has a rectangular space 9 between each flat block 1, which serves as a wide spawning ground. It is formed into a shape.

Since this invention is as described above, it has the following effects.

That is, first, a cross-shaped beam block 2 having a drainage hole 4 is provided on the lower surface of a large flat block 1 to form a main block body 3.
A plurality of main block bodies 3 are stacked and connected by appropriate means, so that large flat block bodies 1 are arranged in a plurality of stages through a rectangular space 9 that can be drained freely on all sides. Because of this, the porpoise squid hangs down from the bottom surface of the flat block body 1 and lays eggs, resulting in an effective artificial fishing reef with several tiers of wide spawning spaces 9.

Secondly, since the cruciform beam block 2 is provided with a drainage hole 4, the spawning space 9 can be used effectively.
Also, the resistance to the current will be small.

Thirdly, each main block body 3 is fixedly attached 6 to the pillar block 5, so that it is firmly integrated.

Fourthly, since the large flat blocks 1 are arranged in several tiers, they become densely packed like large block clusters, effectively attracting fish, and can be effectively used as fishing reefs for fish after squid are caught. It will be done.

Furthermore, Japanese Utility Model Application Publication No. 51-46797 discloses a fishing reef construction board for shrimp and abalone, which is made by stacking plastic elongated plates with protrusions in the lengthwise direction of the upper and lower surfaces, each of which is butted against each other, in multiple tiers. It has been proposed,
In addition, abalone with vertical perforated walls on the top and bottom of the plate,
A fishing reef block for sea urchins is known from Japanese Utility Model Application No. 57-65065.

However, both of these reefs are not artificial reefs for spawning porpoise squid, and the structure described above is not suitable for the habits of porpoise squid and cannot be expected to produce porpoise squid spawning effects. In other words, in the former case, the ridges act as partition walls, making it a very narrow space where seawater can flow in only one direction, making it difficult for porpoise squid to spawn due to difficulties in tidal current conditions, light and darkness, etc. Since the ridges of the elongated plates are simply butted against each other and stacked together, it is unstable and the space is likely to be destroyed. In the latter case, the upper and lower porous walls get in the way, making it impossible to stack the plate-like bodies.

However, in this invention, a main block body is formed by integrally forming a cruciform beam block having drainage holes along the center line of each side of the block on the lower side of a rectangular flat block. Stack the block bodies in multiple stages with the flat block on top,
Vertical pillar blocks are located at the ends of the cross-shaped beam blocks and arranged on the four sides of the flat block, and each main block body is fixed to the vertical pillar blocks, so that rectangular drains are formed on the four sides of each stage. Because it is made by connecting multiple main blocks with flexible spaces, each of the multiple stages has a wide rectangular spawning space on all sides, and all of them are in communication with each other through drainage holes, so that they can be easily accessed from all sides. The flow of seawater, light and darkness, etc. become suitable for spawning squid, resulting in excellent spawning effects. Also,
Each cruciform beam block is placed on a flat block and is stacked stably, and the vertical column block is located at the end of the cruciform beam block and is fixed to each main block body, resulting in a stable and solid structure. It becomes an artificial reef for spawning. For example, as a result of experiments on the structure of beam blocks, it was found that a structure with a rectangular spawning space formed on all sides, such as the one shown in Fig. 5A, effectively spawns eggs in the space on all four sides, as shown by the shaded area. However, in the case where the cross-shaped beam block is installed diagonally to the flat block to form a triangular space on all sides as shown in Figure 5B, an effective spawning condition appears only in one space. However, in the case where an elongated space in one direction was formed using an I-shaped beam block as shown in Figure 5C, there was only a small amount of spawning near the entrance, and this design has an excellent spawning effect for squid. I found out that

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is an overall perspective view of the artificial fishing reef, Fig. 2 is a front view of the same as above, Fig. 3 is a side view, and Fig. 4 is a sectional view taken along the line A-A in Fig. 2. , FIGS. 5A, B, and C are explanatory diagrams of the spawning state. 1...Flat block, 2...Beam block, 3
...Main block type, 9...Space.

Claims (1)

[Scope of utility model registration request] A main block body is formed by integrally forming a cruciform beam block having drainage holes along the center line of each side of the block on the lower surface of a rectangular flat block, and this main block body is formed into a flat plate shape. A plurality of blocks are stacked one on top of the other, and vertical column blocks are placed at the ends of the cross-shaped beam blocks on all sides of the flat block, and each main block body is fixed to the vertical column blocks. An artificial fishing reef for spawning squid, characterized by a plurality of main block bodies connected together, each of which has a rectangular rectangular space on the four sides of each tier.