JPH11266736A - Fish bank and setup thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fish bank capable of effectively culturing small fishes (having culturing function) and capable of attracting large fishes using the small fishes thus cultured as targets (having fish-attracting function), and to provide for setting up the fish bank. SOLUTION: This fish bank is constructed by the following procedure: eight pole members 3 are set upright on the bottom bed 1 placed at the bottom 2 of the sea; among these pole members, the four members are arranged, on the upper part thereof, with shelters 4 for small fishes at intervals each narrower than the body lengths of large fishes; the remaining four members 3 in the vicinity of the shelters 4 are mounted with shielding plates 5 ensuring the downstream side of seawater current not to be seen and also securing a space of slow current of seawater in front of this fish bank so as to allow small fishes to stay; the bottom bed 1 is provided with a shelter 1c for large fishes, and each of the shelters 4 for small fishes is provided with holes 4a for small fish passage at intervals each greater than the body lengths of small fishes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a steel reef and a method for installing the same.

[0002]

2. Description of the Related Art With the establishment of the 200 nautical miles system, the number of fishing grounds outside the country has been greatly reduced.
Therefore, the importance of coastal fisheries is increasing in order to ensure a stable supply of marine products, and artificial reefs have been installed as part of the development of fishing grounds.

[0003] Conventional steel reefs are 30-80.
Many were installed on the seabed in a relatively shallow sea area of about m, and mainly aimed at collecting bottom fish species. And, from the image of a fish reef with such a fish collecting function as an alternative to a concrete reef, the weight is often several tons to several tens of tons, and after assembling the whole on land, transporting it to the installation sea area, It was lifted and installed with a water crane. A conventional fish reef having a fish collecting function has been manufactured based on the idea that fish gather in a turbulent area generated behind a fish reef by a flow.

[0004]

In a relatively shallow water area where conventional fish reefs are installed and light reaches, plankton is breeding. Therefore, it is possible to culture small fish feeding on plankton. Reefs that are installed on the seabed in relatively shallow waters are restricted to fish species that collect in the bottom layer.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has been developed in order to improve the efficiency of fisheries, in addition to the function of collecting fish, which was the object of the conventional fish reef, a reef having a culture function. , And a method of installing this fish reef.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a small fish retreat with upper holes provided with small fish passage holes at intervals larger than the length of the small fish. In addition to making the downstream side invisible, a shield plate is installed in front of the reef to ensure a space where small fish can stay at a low flow rate, and a hideout for large fish is provided in the bottom layer. By doing so, effective cultivation of small fish and collection of large fish are possible.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In a fish reef according to the present invention, a plurality of pillar members are raised from a bottom layer placed on the sea floor, and a hideout for small fish is provided on an appropriate number of these pillar members at the upper part thereof, which is narrower than a large fish. In addition to being arranged at intervals, the downstream side of the stream is not visible on any of the remaining pillar members in the vicinity of these small fish hideouts, and small fish can stay in front of the fish reef. A shield plate for securing a space with a low flow velocity is installed, and a cover for large fish is provided in the bottom layer, and a hole for passing small fish is provided in the cover for small fish. It is provided at intervals larger than the body length of the fish.

[0008] According to the fish reef of the present invention, a shield for small fish is provided at the upper part, and a shield plate is provided to keep the downstream side of the stream from being seen and to secure a space at a low flow velocity where small fish can stay in front of the fish reef. The small fish hideout is provided with holes for the passage of the small fish at intervals larger than the length of the small fish, so that the culture of the small fish can be performed effectively. In addition, since a hideout for large fish is installed in the bottom layer, large fish gather for the cultured small fish.

The above-described fish reef of the present invention is divided into three blocks: a bottom layer, a high-rise section in which a small fish hideout and a shield plate are installed on the column members, and a column member group connecting the bottom layer and the high-rise sections. After dividing these blocks and connecting them with connecting members, and transporting these divided blocks of the bottom layer, the high section and the column member group to a predetermined installation sea area, the bottom layer section, the column member group, and the high layer By connecting and installing each divided block while laying down in the order of the parts, it is possible to use a general surface crane even if the fish reef becomes large, without using a large surface crane corresponding to the fish reef. Can be used to set up large reefs.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fish reef of the present invention will be described based on one embodiment shown in FIGS. 1 to 3, and a method of installing the fish reef divided into blocks of a bottom layer, a high layer and a column member group will be described. FIG. 4-
This will be described with reference to FIG. FIG. 1 is an overall view of a fish reef of the present invention,
2, the lower half of FIG. 2 is an AA view of FIG. 1, the upper half is an BB view of FIG. 1, FIG. 3 (a) is a CC view of FIG.
1 is an arrow DD view of FIG. 1, (c) is a longitudinal sectional view showing an enlarged main part of (b), (d) is an EE view of FIG. 1, (e)
1 is an arrow FF view of FIG. 1, (f) is an arrow GG view of FIG. 1,
4A and 4B are views showing an example of a shackle used in the method of the present invention. FIG. 4A is a diagram showing a load, FIG. 4B is a diagram showing no load, FIG. FIG. 7 is an explanatory view of an installation method of the present invention using a guide wire system, and FIGS. 7A and 7B are views showing an example of a connecting member. FIG.

In FIGS. 1 and 2, reference numeral 1 denotes a steel pipe or a mold steel, for example, as shown in FIG. 2 (a), the bottom diameter is about 20 m, the top diameter is about 5 m, and the height is about 8. 5 m is a bottom layer portion formed in a truncated octagonal pyramid shape, and a leg portion 1 a is provided at each apex portion of the bottom surface.
m buried on the seabed 2.

For example, a shielding plate 1b is attached to the upper outer peripheral surface of the truncated octagonal pyramid of the bottom layer portion 1 so as to be invisible from above, and a large fish hideout aiming at a small fish cultured in a hideout 4 described later. 1c.

Reference numeral 3 denotes eight column members raised at the top, for example, at each apex, of the upper surface of the bottom layer portion 1 formed in the shape of a truncated octagonal pyramid. For example, a steel pipe having a length of 24 m is employed. You. Then, the diameter is 2.1 m at the upper part of the four pillar members 3 at one interval, for example, at a position of 36 to 39 m in water depth.
The four cylindrical steel chambers are arranged in the same plane, four in the height direction, at intervals smaller than the body length of the large fish, and the small fish hideout 4 that feeds on plankton within the reach of light is formed. doing.

As shown in FIG. 3C, for example, the diameter of the twelve hiding places 4 is, for example, 50 to 15 mm.
A large number of 0 mm small fish passage holes 4 a are provided at intervals larger than the body length of the small fish, for example, at intervals of 50 mm or more. The size and the installation position of the passage hole 4a are not particularly limited, but are preferably provided at random.

Reference numeral 5 denotes the remaining four pillar members 3 in the vicinity of the small fish hiding place 4 where the hiding place 4 is not installed.
In addition, for example, a shielding plate installed toward the center of the eight pillar members 3, when installed on the seabed 2, makes the downstream side of the stream invisible and small fish stay in front of the fish reef. This is to secure a space where the flow velocity is low.

Numeral 6 designates a top formed at the tip of the above-mentioned column member 3 by, for example, a quadrangular pyramid made of a steel shape. In this embodiment, a shielding plate 6a is also attached to the upper portion of the top 6 to form a small fish hideout 6b. Shows what was formed.

The fish reef of the present invention has the above-described configuration. For example, the length of the pillar member 3 is determined according to the water depth of the installation sea area so that the hideout 4 for small fish is located at a depth of about 30 to 40 m. Then, the hideout 4 and the downstream side of the stream are not visible, and the plankton that feeds to the hideout 4 is provided by the action of the shield plate 5 which secures a space at a low flow velocity where small fish can stay in front of the reef. It is possible to effectively culture the small fish gathered aiming at. Then, large fish gather in the hidden house 1c installed in the bottom layer part 1, aiming at the cultured small fish.

The fish reef of the present invention is made of steel,
In the case of a large size, if it is manufactured on land, transported to a predetermined sea area, and submerged, the generally adopted effective lifting load is 200 ton class (actual effective lifting load is 50 tons).
A floating crane with a lifting capacity greater than Such large lifting cranes have a small number and high rental and voyage costs.

Accordingly, the above-mentioned fish reef of the present invention is constructed by combining the bottom layer 1, the high-rise section 7 in which the small fish hideout 4 and the shielding plate 5 are installed on the pillar member 3, and connecting the bottom layer 1 and the high-rise section 7 to each other. If the block is divided into three blocks of three groups of pillar members to be connected, and these blocks are connected by the connecting member 8, even if it is a large fish reef, a large water crane is not used. It can be installed using a simple water crane.
This is the fish reef of the second invention.

Next, a method of installing a fish reef according to the second invention in a predetermined sea area will be described with reference to FIGS. As described above, each divided block of the bottom layer 1, the high-rise section 7, and the column member 3 group is transported to a predetermined installation sea area. Then, using a water crane, first, the bottom layer 1 is wire rope 10
And suspended at a predetermined location.

At this time, when the bottom layer 1 (column group 3 and high section 7) is loaded, the frictional force of the pin 9a overcomes the urging force of the spring 9b and the state shown in FIG. By holding, the bottom layer 1 (group 3 of pillars, high-rise section 7) can be lifted, while the bottom layer 1 has landed on the seabed 2 (group 3 of pillars, high-rise section 7 has bottom layer 1, At the time of no load (placed on the column member 3 group), as shown in FIG. 4B, the pin 9a is retracted by the urging force of the spring 9b, and the wire rope 10 is opened. If the shackle 9 is installed in the bottom layer 1 (the column member 3 group, the high-rise section 7), work efficiency can be improved.

After the bottom layer 1 is landed on a predetermined place,
While each of the divided blocks is connected and installed while being sunk in the order of the column member 3 group and the high-rise section 7, at this time, for example, as shown in FIG. The pillars 11 are projected and the center pillars 11 are used as guides for submerging the column members 3 and the high-rise portions 7, and as shown in FIG. A plurality of cable guides 12 are installed, and a guide wire 13 passed through the cable guides 12 is used as a guide for the column member 3.
If the group and the high-rise section 7 are laid down, positioning between the divided blocks can be easily performed.

It is needless to say that the guide wire 13 is connected in advance when the bottom layer 1 is on the water. Further, after the installation of the fish reef is completed, the guide wire 13 is cut on the water to be a discard wire. In addition, 14 in FIG. 6 is a crane barge.

The configuration of the connecting member 8 for connecting the divided blocks is not particularly limited as long as the connecting member 8 is easily connected and cannot be easily removed after the connection is completed. The structure shown in FIG.

That is, the connecting member 8 shown in FIG. 7 includes a male member 8a and a female member 8b. The male member 8a has, for example, two engagement pieces 8aa attached to the distal end thereof with the distal end side pivotally supported.
A weight 8ad is suspended from a mandrel 8ab having a central portion penetrating therethrough through a weak link 8ac having only one chain thinned. On the other hand, the female member 8b
The male member 8a is inserted into the male member 8a.
A hole 8ba having substantially the same shape as the tip of the male member 8a is provided in the hole 8ba, and an engagement hole 8bb is provided in a side wall facing the engagement piece 8aa when the tip of the male member 8a is fitted into the hole 8ba.

When such a connecting member 8 is employed, the engagement is completed only by pushing down the mandrel 8ab after the tip of the male member 8a is fitted into the female member 8b. That is, when the mandrel 8ab is depressed, the weak link 8ac
As a result, the weight 8ad falls and the engaging piece 8aa is pushed open so that the engaging piece 8aa fits into the engaging hole 8bb. After the fitting, the engaging piece 8aa is kept expanded by the weight 8ad, so that the engaging piece 8aa does not easily come off.

According to the installation method of the present invention as described above, even if the size of the fish reef is increased, a large crane suitable for the fish reef can be used without using a large crane. Fish reefs can be set up.

[0028]

As described above, according to the fish reef of the present invention, a hideout for small fish is provided at the upper part, and the flow velocity at which the small fish can stay in front of the fish reef while making the downstream side of the stream invisible. A shield plate that secures a small space is installed, and holes for small fish are provided in the hiding place for small fish at intervals larger than the body length of small fish, so that small fish can be cultured effectively. In addition, since a hiding place for large fish is installed in the bottom layer, large fish can be collected by aiming at the cultured small fish. That is, since the reef of the present invention is a reef having a fish collecting function and a culturing function, it plays a great role in improving fishing efficiency.

The above-mentioned fish reef of the present invention is divided into three parts: a bottom part, a high part where a small fish hideout and a shielding plate are installed on the column member, and a column member group connecting the bottom part and the high part. After being divided into blocks, each of these blocks is configured to be connectable by a connecting member, and these divided blocks of the bottom layer, the high-rise portion, and the column member group are transported to a predetermined installation sea area, the bottom layer portion, the column member group By installing the connected blocks between the divided blocks while laying down in the order of the high-rise sections, even if the reef becomes large, it is possible to use a general crane without using a large crane suitable for the reef To set up a large reef.

[Brief description of the drawings]

FIG. 1 is an overall view of a fish reef of the present invention.

2 is a view taken along the line AA of FIG. 1 in the lower half, and a view taken along the line BB of FIG. 1 in the upper half.

3A is a sectional view taken along the line CC of FIG. 1, FIG. 3B is a sectional view taken along the line DD of FIG. 1, and FIG. 1, (d) is an EE view in FIG. 1, (e) is an FF view in FIG. 1, and (f) is a GG view in FIG.

FIGS. 4A and 4B are diagrams showing an example of a shackle used in the method of the present invention, wherein FIG.

FIG. 5 is an explanatory diagram of an installation method of the present invention using a center pillar system.

FIG. 6 is an explanatory view of an installation method of the present invention using a guide wire method.

FIGS. 7A and 7B are diagrams showing an example of a connecting member, wherein FIG. 7A shows a state before connection and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom layer part 1c Hidden house 3 Column member 4 Hidden house 4a Passage hole 5 Shield plate 7 High-rise part 8 Connection member

Claims (3)

[Claims] 1. A plurality of pillar members are raised from a bottom layer placed on the seabed, hideouts for small fish are arranged at appropriate upper portions of these pillar members at intervals smaller than the body length of the large fish, and these small members are arranged. A shield that prevents the downstream side of the flow from being seen in any of the column members near the fish hiding place, and that secures a space at a low flow velocity where small fish can stay in front of the fish reef. A board is installed, and a structure is provided in which a hide for large fish is provided in the bottom layer portion.In the hide for small fish, holes for passing small fish are provided at intervals larger than the body length of the small fish. A fish reef characterized by that. 2. The fish reef according to claim 1, comprising a bottom layer portion, a high-rise portion having a small fish hideout and a shielding plate installed on the column member, and a column member group connecting the bottom layer portion and the high-rise portion. A fish reef characterized by being divided into blocks and connecting these blocks with connecting members. 3. The method according to claim 2, wherein each of the divided blocks of the bottom layer, the high-rise section, and the column member group is transported to a predetermined installation sea area, and then the bottom layer section and the column member group are installed. And connecting the divided blocks while laying down in the order of the high-rise part.