JP3684502B2 - Cast iron framework timber fish reef - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention aims to generate various types of plankton and fry in the natural environment under the sea, and to grow up to adult fish, the structure of cast iron framework wood reef, concrete reef, piped reef, and concrete block for mooring, It belongs to the technical field regarding the placement method and the like.
[0002]
[Prior art]
In the past, fish reefs have been generally distributed irregularly by dropping a large number of one type of reef, but only a limited number of fish species that prefer the shape of the reef, or fish of a specific size. There was a strong tendency to gather.
[0003]
In such fish reefs, there is not enough environment for plankton and small animals to inhabit the gathered fish, so a food chain is not built for the gathered fish to grow inside and around the reef, and as a result Problems such as few or no fish settled on the reef were not solved.
0004
Because it does not consider the propagation of fish in the reefs that are installed, only fish gathered from the surrounding waters are caught near the reefs, and the reefs themselves have no ability to generate new resources.
[0005]
Timber fish reefs that use thinned wood are based on concrete, where one end of the timber is embedded, or timber is fixed using reinforcing bars fixed to the concrete. Since it disappears in ~ 3 years, the effective period as a fish reef is very short, and there was a big problem in cost effectiveness.
[0006]
The establishment of fish reefs has been addressed for many years as a central measure of fishery promotion throughout the country, but basically lacks the ability to increase fish, so in the long term, fishing is contrary to the purpose of fishery promotion. The decline in fisheries has caused serious declines, and the slump in fisheries is getting worse.
[0007]
[Problems to be solved by the invention]
To create an environment where fry can grow in large quantities by this fish reef and to realize a fishing environment blessed with rich marine resources.
[0008]
Most of the sea floor is sandy except near the shore, and there are cases where rocks and gravel are scattered, but there are very few rocks, holes, and gaps that are suitable habitats for fish. Therefore, unless this situation is greatly improved, an increase in fishery resources cannot be expected.
[0009]
The current mainstream method of installing a large number of single-type reefs only gathers migratory fish and cannot create an environment with a food chain for fish to grow from fry. Does not contribute.
[0010]
Since many fish reefs are installed on the seabed at a depth of 50 to 100 meters, they are beyond the scope of diving work, making post-installation surveys and management virtually impossible.
[0011]
Since the installed reefs are hardly managed after installation and are virtually neglected, the installed reefs have lost their intended performance in a short period of time.
[0012]
Since wood fish reefs currently made in Japan use concrete as a weight, only a concrete base that has no function as a fishing reef is left after the disappearance of wood, and the fatal life of the fish reef is short The wood that is effective for the growth of fish is not fully utilized.
[0013]
Currently, in order to efficiently capture large quantities of fish gathering at reefs using fishing nets and other fishing methods, the fishing rate exceeds the recovery rate of resources due to the growth of fry, leading to depletion of fishery resources.
[0014]
[Means for Solving the Problems]
By installing this fish reef on the seabed at a depth of about 20 to 30 meters, it becomes possible to regularly check and manage the state of the fish reef through diving surveys, and the effect of installing the fish reef can be maintained over a long period of time.
[0015]
By using a cast iron frame that has a large specific gravity as a weight for timber fish reefs, it becomes possible to incorporate a larger amount of wood more efficiently than in the case of concrete, and it is possible to secure more gaps and spaces where fish prefer to live.
0016
The cast iron frame can maintain its ability as a fish reef for many years because it can be pulled up and replenished again and again even if the wood disappears in 2 to 3 years.
[0017]
Surrounding the timber fish reef with a large concrete fish reef is expected to have the effect of ensuring the durability of the entire reef against tidal currents and preventing fry fish from being swept away by a strong tidal current.
[0018]
The concrete fish reef has a structure suitable for anchoring a relatively large fish while providing a function of adjusting a tidal current flowing into the reef by providing several spaces above and below.
[0019]
About the shape of the concrete fish reef, by providing an inclination so as to become lower toward the outside, it has the effect of pushing up the tide flowing in the horizontal direction along the sea floor by the inclination, which makes the concrete fish reef a strong tide However, it is stable and has the effect of continuously supplying organic and inorganic nutrients from the seabed to the upper part of the fish reef, which can promote the generation and growth of phytoplankton and zooplankton near the upper part of the fish reef.
[0020]
The pipe fish reef is composed of large and small circular and rectangular pipes, and has a large number of small hole-like spaces in the form of honeycomb, ensuring an environment where a large number of fry can live while protecting themselves from external enemies,
Improve and expand fishery resources by increasing the survival rate of fry.
[0021]
By installing this fish reef with a large area on the sea floor, floats floating on the sea from mooring concrete blocks installed at regular intervals become an obstacle, and fishing methods that lead to overfishing such as nets and bottom nets can no longer be implemented in that sea area In the long run, a significant increase in catch is possible.
[0022]
[Embodiments of the Invention]
In order to facilitate the incorporation of wood, a large number of holes corresponding to the diameter and number of wood to be incorporated are formed in a rectangular thick cast iron plate frame.
[0023]
By aligning the number and thickness of timber according to the number of holes in the cast iron frame, and inserting them into the holes in the cast iron frame from both sides of the timber, To do.
[0024]
In order to prevent the inserted wood from coming out of the cast iron frame, the lumber is secured by nailing a total of four places at both ends of the wood on the inside and outside of the cast iron frame inserted about 10 cm from both ends of the wood. Secure to cast iron frame.
[0025]
One timber fish reef is formed by alternately stacking vertical and horizontal cocoon-like units composed of wood and two cast iron frames according to the number of holes in the cast iron frame.
[0026]
By adjusting the number of wood to be used and the number of steps of the cast iron frame, it is possible to obtain a fish reef corresponding to the target fish species and the size of the fish body.
[0027]
These cubic cast iron framed wood fish reefs are arranged vertically and horizontally at regular intervals, and the outer periphery is surrounded by a larger concrete fish reef to constitute a wood fish reef system.
[0028]
About the shape of the concrete fish reef, by setting the slope so as to become lower toward the outside, the action of pushing the flowing tide upwards along this slope occurs, and thereby the concrete fish reef is pressed against the sea bottom by reaction Born, and can stably protect the entire timber reef system even under strong tides such as typhoons.
[0029]
Concrete fish reefs are provided with several box-shaped tunnels in the horizontal direction to ensure an appropriate amount of tidal current to the wood reef inside and provide a habitat for large fish.
[0030]
Space where small fish and small fry can inhabit by placing pipe fish reefs with a certain shape by stacking pipes of various thicknesses of circular or rectangular of a certain length between concrete fish reefs and wood reefs, etc. I will provide a.
[0031]
In the case of this timber fish reef system, it is necessary to arrange the concrete timber reefs and pipe reefs after placing concrete reefs in the initial construction, so the work boat is fixed at a fixed position on the ocean where there is a tide. As described above, heavy mooring concrete blocks are arranged at regular intervals between concrete fish reefs.
[0032]
The system will allow mooring of crane work boats to the required locations by floating floats on the water surface with rope from mooring concrete blocks.
0033
Timber that has been incorporated into timber fish reefs and submerged in the sea disappears in about 2 to 4 years due to the damage of marine organisms, so it is necessary to supplement the wood regularly over a period of about 4 to 5 years. In addition, it is possible to perform the sinking work by fixing the work ship at an optimal position using the float.
[0034]
A large-scale timber reef system can be constructed by arranging a timber reef system surrounded by a concrete reef as a unit, and extending this vertically and horizontally, and a significant increase in catch can be realized.
[0035]
【The invention's effect】
By effectively arranging various types of fish reefs according to the present invention, it is possible to grow from a large number of fry to adults in the natural environment, and by appropriately managing this, a significant increase in the catch is permanently achieved. Can be realized.
[0036]
By utilizing the present invention, it becomes possible to greatly increase the catch of rooted fish such as ara and red sea bream which are generally regarded as high grade.
[0037]
The location of the fish reef is targeted at relatively shallow waters with a water depth of about 20 to 30 meters. The distance from the coast is close, and the main fishing operations are small fishing boats. It eliminates the need for expensive fishery equipment such as radar and radio equipment, and requires only a small amount of fuel for the ship. This greatly reduces the economic burden on fishermen.
[0038]
If the area where fish reefs are installed increases, the mooring float becomes an obstacle, and fishing methods such as purse seine and bottom fishing that are harmful to the increase in fish cannot be practically implemented in the vicinity. Advancing and realizing a dramatic increase in fishery resources.
[0039]
If the fish reef system becomes widespread and catches on the coast increase, the return from the ocean fishery by large vessels and conversion will progress, and the energy consumption will be reduced, which will greatly contribute to CO2 emission reduction and environmental pollution measures by exhaust gas. It will be.
[0040]
It is possible to monitor the sea area where fish reefs are installed from the coast, which can prevent illegal operations and operations by foreign ships.
[0041]
The fish species that grow on this reef are small in number because there are many high-class fish such as ara, sea bream, and flounder, and large migratory fish gather for the purpose of supplementing them because there are large numbers of fry and small fish. However, because sufficient profits can be expected, the number of operating days and operating hours can be shortened, freed from dangerous operations during heavy labor and stormy weather, and the working environment of fishermen is greatly improved.
[0042]
Thinned wood used for fish reefs does not need to remove the skin and does not need to be dried, so there is a merit that processing work can be minimized, and there are almost no problems with slight deformation and size. Therefore, timber fish reefs are very effective as a treatment for thinned wood.
[0043]
To protect and foster forests, large-scale and continuous use of thinned wood, which is currently an urgent issue, will be established.
[0044]
As thinning progresses, the water retention capacity of the forest is improved, resulting in a disaster prevention effect due to reduced flood damage and the elimination of water shortages.
[0045]
Timber that has not been usefully used and discarded at the tip of regularly harvested timber other than thinning can be used effectively for fish reefs.
[0046]
The decline in food self-sufficiency in Japan has not stopped, but if the increase in catch by the fish reef is realized, high-quality protein sources will become self-sufficient, and the value of the food strategy for the future Is immeasurable.
[0047]
If thinning is carried out properly, it will lead to a reduction in enormous national losses, especially medical expenses, as a measure against hay fever centering on cedar pollen, which is said to be one in ten.
[Brief description of the drawings]
[Fig. 1] Plan view from the top of the structure of the cast iron frame [Fig. 2] Front view of the cast iron frame [Fig. 3] Side view of the cast iron frame [Fig. 4] How to overlap the cast iron frames [Fig. [Fig. 6] Overview of cast iron frame overlay [Fig. 7] Overview of cast iron frame [Fig. 8] Overview of state in which wood is incorporated into the cast iron frame [Fig. 9] Method of fixing wood to cast iron frame [Fig. 10] Cast iron frame assembly overview [Fig. 11] Cast iron framework lumber fish reef Plan view [Fig. 12] Front view [Fig. 13] Side view [Fig. 14] Side view of submarine concrete fish reef and wood fish reef arrangement [Fig. 15] Peripheral concrete Fish reef plan [Fig. 16] Concrete fish reef front view (common for outer periphery and partition)
[Fig. 17] Peripheral concrete fish reef side view [Fig. 18] Perimeter concrete fish reef overview [Fig. 19] Mooring concrete block [Fig. 20] Cubic large lobster shelf (pipe-assembled fish reef) Front view [Fig. 21] Overview [Figure 22] Cylindrical large lobster shelf (pipe-assembled fish reef)
[Figure 23] Cylindrical large lobster shelf (pipe-assembled fish reef)
[Fig.24] Variations in the lobster shelf (pipe assembled reef) for gaps
Rectangular partition type Ise shrimp shelf [Figure 25] Circular partition type Ise shrimp shelf (pipe-assembled fish reef)
[Figure 26] Installation overview of Ise shrimp shelf (pipe-assembled fish reef) [Figure 27] Layout plan of wood fish reef, concrete fish reef and Ise shrimp shelf [Figure 28] Layout plan of wood fish reef, concrete fish reef and Ise shrimp shelf- 2
[Figure 29] Layout of the large reef system [Figure 30] Overview of the installation work of the reef system

Claims (8)

Along with forming a lot of circular holes in a rectangular cast iron, two cast iron frames with shallow grooves formed in four places on both sides of this cast iron are arranged, and a certain length of wood is inserted into each hole of the cast iron frame. The cast iron frame and the wood are fixed to each other by driving about half of the length of the nail into the inside and outside of the cast iron frame on both sides of the wood to form a scissors-like unit, and the units are connected to each other with shallow grooves. Cast iron framed timber fish reef, which is assembled in a cross-beam shape so that they overlap 2. The cast iron framework lumber fish reef according to claim 1, wherein the cast iron framework lumber fish reef is arranged on the bottom of the sea at regular intervals in all directions. 3. A cast-iron-framed timber fish reef according to claim 1 or 2, wherein concrete fish reefs are arranged around the outer periphery to prevent the influence of ocean currents and tidal currents. 4. The cast iron framework lumber fish reef according to claim 3, wherein the concrete fish reef is formed with an inclined portion that becomes lower toward the outside so that the tidal current can be received upward. The cast-iron-framed lumber fish reef according to claim 3 or 4, wherein the concrete fish reef is provided with several square-shaped tunnel spaces in the horizontal direction. 6. The cast iron framework according to claim 3, 4 or 5, wherein a pipe assembled fish reef having a large number of finely partitioned spaces such as a rectangular shape or a circular shape or a box shape is disposed between the concrete fish reefs. Wood fish reef The cast iron framework wood fish reef according to claim 3, 4, 5 or 6, wherein a concrete block for mooring is arranged between the concrete fish reefs. 8. The cast iron framework lumber fish reef according to claim 7, wherein a float is floated on the water surface with a rope from the mooring concrete block, and the work ship can be fixed at a certain position on the ocean.

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