JPH0337404Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a turban reef for growing turban shells.

[Prior art]

Once the turban shells have passed the juvenile stage and enter the growth stage, they begin to live in rocky areas in shallow waters where sunlight reaches the ocean floor, where there is plenty of algae to feed on. In order to hide from their predators, such as other fish, they have the habit of hiding in the depressions of rocky reefs during the day and searching for food at night. Traditionally, natural stones have been dumped into the sea to create habitats for these turban shells. However, natural stones dumped on the seabed in this way are scattered by ocean currents and rough waves, so they continue to be dumped one after another on a regular basis. Recently, however, it has become difficult to secure natural stone due to regulations for preserving the natural environment and regulations regarding quarrying, so concrete blocks have been erected instead.

The present applicant had also previously developed and applied for a block for growing turban shells and abalone (Utility Application No. 58-45772).
issue). FIG. 2 is a perspective view showing the shape of a block for growing turban shells and abalone that was previously filed by the applicant. As shown in the figure, the blocks for growing turban shells and abalone are made of 10 26-sided concrete blocks.
0, and has a shape in which a large number of semi-elliptic spherical concave depressions 101 are provided on the outer surface of the concrete block 100.

If the block for growing turban shells and abalone with the above structure is sunk in shallow waters where sunlight reaches the seabed, turban shells will live in the concave depressions that are exposed to sunlight at the top, and the blocks at the bottom that are not exposed to sunlight. Abalone live in the concave depressions.

[Problem that the invention attempts to solve]

As mentioned above, in the above block for growing turban shells and abalone, turban shells live in the upper concave depression that is exposed to sunlight, and abalones live in the lower depression that is not irradiated with sunlight, thereby growing turban shells and abalone. It has been confirmed through experiments that the reef is highly effective when deposited in shallow rocky waters off the coast of Japan, but there have been problems in efficiently collecting grown turban shells. That is, as is well known, turban shells cannot be collected with nets and must be collected one by one by diving, etc., but turban shells can be collected with nets during nighttime foraging activities.
When collecting turban shells with a net in this manner, the above-mentioned 26-sided concrete block had the disadvantage that when the net was pulled up, the net would become entangled with the bottom of the concrete block.

In addition, in the concrete block of the above structure,
When making concrete blocks with a weight suitable for the sea area, taking into consideration factors such as the size of waves and the speed of ocean currents, formwork of various sizes is prepared, and the formwork is changed depending on the weight to manufacture concrete blocks. Therefore, it had the disadvantage that it could only be completed by preparing a large number of formworks.

Furthermore, since the concrete block of the above structure is not a reef exclusively for turban shells, it also has the disadvantage that it is not possible to provide a large number of sunlight-irradiated depressions on the outer surface of the reef where turban shells like to live.

The present invention was developed in view of the above points, and is suitable for collecting turban shells. It is possible to produce many types of concrete blocks with different weights using one formwork without having to prepare many large and small formworks, and it is suitable for collecting turban shells. To provide a turban shell reef with a structure capable of providing a large number of sunlight-irradiated concave depressions where turban shellfish prefer to live.

[Means for solving problems]

In order to solve the above problems, the present invention forms a turban reef by forming a large number of concave depressions composed of many flat surfaces on the outer surface of a concrete block formed in the shape of a truncated polygonal pyramid, and The concrete block is characterized by having a cavity whose bottom and top are open to the top and bottom surfaces of the concrete block.

[Effect]

By making the turban reef with the above structure, since the concrete block that is the base of the reef is a truncated polygonal pyramid, the top surface and surrounding side surfaces are the surfaces that are irradiated with sunlight, so the concave depressions provided on these surfaces. is a favorite habitat for turban shells. In addition, since the concrete block is a truncated polygonal pyramid, even if a net for collecting turban shells is placed over the concrete block and the net is pulled up, the net will not get caught on the concrete block, making it easier to collect turban shells. .
In addition, since cavities of various sizes are provided inside the concrete block and communicate with the top and bottom,
A single outer frame for manufacturing concrete blocks can manufacture turban reefs of various weights.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 and 3 to 5 are diagrams showing the structure of a turban reef according to the present invention.

As shown in Fig. 1, the turban reef 1 consists of a concrete block in the shape of a hexagonal truncated pyramid, and its six slanted outer circumferential sides 11 and the top 12 have multifaceted concave depressions 14, 15 in which turban shells live. form a large number of

Figure 3a is a partial front view of the turban reef 1 mentioned above.
Figure b is a partial sectional view on the line A-A of Figure a, Figure 4a.
4B is a partial plan view of the turban reef 1, and FIG. 4B is a partial sectional view taken along the line B--B in FIG. Outer peripheral side 11
The concave depression 14 formed in the figure is a depression having a space in the shape of a distorted four-sided truncated pyramid formed from five flat sides, as shown in the figure. The concave depression 15 formed in the top portion 12 is a depression having an approximately square pyramid-shaped space formed from five sides.

Inside the turban reef 1, as shown in the longitudinal cross-sectional view in FIG.
7 is formed, and a hollow portion 17 has a bottom portion communicating with the bottom of the turban reef 1 and an upper portion communicating with the top of the turban reef 1 through a hole 13. The size of the cavity 17 is formed according to the weight of the turban reef 1, and for a heavy turban reef 1 that is submerged in an ocean area with rough waves and strong ocean currents, the cavity 17 is indicated by the dotted line A in the figure. The turban reef 1, which is small in size and has a light weight and is submerged in an area with calm waves and calm ocean currents, has a hollow part 17.
is increased as shown by dotted line B in the same figure. That is, when manufacturing the turban reef 1, whether the turban reef 1 is heavy or the turban reef 1 is light, the outer formwork used has the same dimensions, and the hollow part 1 is
By changing the dimensions of the formwork of the portion forming the turban shell 7 according to the weight, turban reefs 1 of various weights can be made using the outer formwork of the same size. Note that the shape of the hollow portion 17 is not limited to a truncated cone shape, but may be a hexagonal truncated pyramid shape similar to the outer shape of the turban reef 1, or may be of other shapes. Further, three hanging fittings 16 for hoisting the turban shell reef 1 are provided on the top 12 of the turban shell reef 1.

When installing the turban reef 1 having the above structure in a shallow sea area where sunlight reaches the seabed, the hanging fitting 1
Step 6: Pass the lifting wire rope through the crane and lift it to the seabed. At this time, turban reef 1
The air in the internal cavity 17 of is released through the hole 13 in the top 12, and the cavity 17 is filled with seawater. Since the turban reef 1 is shaped like a truncated cone, it can be stably deposited on the seabed.

As described above, when the turban shell reef 1 is sunk in a shallow sea area where sunlight reaches the seabed, the sunlight illuminates the outer peripheral side surface 11 and the top 12 of the turban shell 1, and the concave depressions 14 and 15 are where turban shells prefer to live. A place to arrive. Therefore, during the day, the nocturnal turban shellfish 18, as shown in FIG. 3b and FIG.
5, and will be active at night in search of nocturnal food such as seaweed.

When the turban shell reef 1 having the above structure is sunk on the seabed and the turban shells living mainly on the turban shell reef 1 are collected, the turban shell reef 1 is covered with a net 19 for collecting turban shells from above, as shown in FIG. As a result, Turban Reef 1
When the turban shells entering the concave depression 14 on the outer circumferential side surface 11 or the concave depression 15 in the top 12 go out of the turban shell reef 1 in search of food, the rod-shaped projections of their shells become entangled in the net 19. Furthermore, when a turban shell returning to the turban shell reef 1 from the outside tries to enter the concave depression 14 on the outer circumferential side surface 11 or the concave depression 15 on the top 12, the rod-shaped protrusion of the shell becomes entangled in the net 19. Therefore, when the net 19 is pulled up, the turban shells entangled in the net 19 can be collected. When the net 19 is pulled up, the net 19 will not be caught on the turban reef 11 because the turban reef 1 is shaped like a truncated cone with a large bottom and a small top. As explained above, according to the above embodiment, since the turban reef 1 has a hexagonal truncated pyramid shape,
Since the outer circumferential side surface 11 and the top portion 12 are illuminated by sunlight and become a favorite habitat for turban shells, the concave depression 1 is
Turban shells like to live on 4th and 15th. Furthermore, since a cavity 17 of a size corresponding to the weight of the turban shell reef 1 is formed inside the turban shell reef 1, it is possible to create turban shell reefs 1 with the same external dimensions but different weights using the same outer frame. . Furthermore, since the turban shell reef 1 is made of a hexagonal truncated pyramid concrete block, there is no place for the turban shell collecting net to get caught, making it extremely easy to collect turban shells.

In addition, since the turban shell reef 1 has a hexagonal truncated pyramid shape, when a wave hits the turban shell reef 1, an upward vortex is generated, which causes an abundance of oxygen to exist around the turban shell reef 1. This makes it an excellent habitat for turban shells.

In the above embodiment, the turban reef 1 is made of a concrete block with a hexagonal truncated pyramid, but it is not limited to this, and it may have a smaller number, for example, a 4- or 5-sided truncated pyramid, or a larger number of 7- or 8-sided truncated pyramids. It goes without saying that a concrete block of the body could also be used.

[Effect of idea]

As explained above, according to the present invention, since the concrete block that serves as the base of the reef is a truncated polygonal pyramid, the top surface and surrounding side surfaces are surfaces that are irradiated with sunlight, and the concave depressions provided on these surfaces are will like to live there. In addition, since the concrete block is a truncated polygonal pyramid, even if a net for collecting turban shells is placed over the concrete block and the net is pulled up, the net will not get caught on the concrete block, making it easier to collect turban shells. . In addition, since cavities of various sizes communicating with the top and bottom are provided inside the concrete block, it becomes possible to manufacture turban reefs of various weights with a single outer frame for manufacturing the concrete block. Excellent effects can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the appearance of a turban reef according to the present invention, Fig. 2 is a perspective view showing the appearance of a block for growing turban shells and abalone that the applicant previously applied for, and Fig. 3a is a perspective view showing the appearance of a turban shell reef according to the present invention. A partial front view of the turban reef, FIG.
Figure 4b is a partial plan view of the turban reef according to the present invention.
5 is a longitudinal sectional view of the turban reef according to the present invention, and FIG. 6 is a perspective view showing the state in which the turban reef according to the present invention is covered with a net. be. In the figure, 1... Turban reef, 11... Outer circumferential side, 1
2...Top part, 13...Hole, 14, 15...Concave depression, 16...Hanging fitting, 17...Cavity part, 18...
Turban shell, 19...net.

Claims (1)

[Scope of utility model registration request] A large number of concave depressions composed of many flat surfaces are formed on the outer surface of a concrete block formed in the shape of a truncated polygonal pyramid, and a cavity whose bottom and top are open to the top and bottom surfaces of the concrete block is formed inside the concrete block. A turban reef characterized by the fact that it was created.