Floating fish reef

Abstract

To suppress oscillation such as rolling due to a wave force on the sea with a compact structure.SOLUTION: A surface layer type floating fish reef floats in the ocean with a part of a surface layer floating body 11 sunk under the water. The surface layer floating body 11 has: a deck part 11a which normally projects from the sea surface and is provided with meters such as a lamp 11a3 and an antenna 11a4 via a fence 11a1 and a mast 11a2; an outer shell part 11b suspending vertically from an outermost part of the deck part 11a and becoming a side surface; an inclined surface part 11d extending while tilting toward the center as it goes downward from a lower end of the outer shell part 11b; a bottom surface part 11c extending from the lower end of the inclined surface part 11d facing the deck part 11a; and an oscillation suppression part 11e which is integrated with the outer shell part 11b from a boundary between the outer shell part 11b and the inclined surface part 11d, and opens downward by extending downward while facing the inclined surface part 11c flush, becomes resistance when the surface layer type floating fish reef 1 oscillates, and suppresses the oscillations.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a surface-type floating fish reef that can suppress motions such as rolling caused by wave forces at sea. [Background technology]

[0002] Surface-type floating fish reefs are required to be structurally safe against waves, tidal currents, wind, etc., and more specifically, the floating body must be statically and dynamically stable against the effects of waves, tidal currents, wind, etc. In particular, surface-type floating fish reefs are highly susceptible to wave force, so they are required to remain almost upright on the sea surface against wave force.

[0003] Therefore, in order to improve the safety of surface-type floating fish reefs and reduce wave motion, a floating fish reef has been proposed that consists of a surface floating body that floats on the sea surface, a column that connects a mooring line to a lower part that hangs down from the bottom end of the surface floating body into the sea, and a large, planar artificial seabed structure that is installed horizontally below the column, in which a stabilizing rudder with a vertical stabilizer and a horizontal stabilizer is installed so as to protrude from one planar end of the artificial seabed structure (see, for example, Patent Document 1).

[0004] In this surface-type floating fish reef, the stabilizing rudder that protrudes from the artificial seabed structure functions as a stabilizer against wave-induced motion, suppressing motion such as lateral swaying caused by wave forces at sea and preventing the surface-type floating fish reef from tilting too much in the ocean. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3011374 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the surface-type floating fish reef described in Patent Document 1 has a large artificial seabed structure attached to the bottom of the surface float, which makes the entire floating fish reef larger and heavier, resulting in the problem of a heavy workload when transporting the surface-type floating fish reef on land or installing it in the ocean.

[0007] In particular, the surface-type floating fish reef described in Patent Document 1 has a stabilizing rudder that protrudes outward from the artificial seabed structure, which also makes the entire surface-type floating fish reef larger, posing the problem of a heavy workload during transportation and installation.

[0008] Furthermore, the floating fish reef described in Patent Document 1 has an artificial seabed structure, which means that the surface floating body is large to ensure buoyancy, and as the surface floating body becomes larger, the area that receives pressure from waves, etc. also increases, which places a heavy burden on the mooring lines, which is an undesirable design problem.

[0009] Therefore, the present invention has been made in consideration of these problems, and aims to provide a surface-type floating fish reef that has a compact structure and can suppress movements such as rolling caused by wave forces at sea. [Means for solving the problem]

[0010] In order to solve the above problems, the surface-type floating fish reef of the present invention is a floating fish reef having a surface float that floats with a portion submerged below the water surface, and is characterized in that the surface float is provided with an inclined surface portion that slopes downward toward the center, and has a motion suppression portion that extends downward facing the inclined surface portion, opening downward and providing resistance when the surface-type floating fish reef moves, suppressing the motion. Furthermore, the surface-type floating fish reef of the present invention is further characterized in that it has an outer shell portion extending upward from the outermost side of the inclined surface portion, and the motion suppression portion is arranged flush with the outer shell portion or joined to the outer surface of the outer shell portion so as to hang down downward. Furthermore, the surface-type floating fish reef of the present invention is further characterized in that it has an outer shell portion extending upward from the outermost part of the inclined surface portion, and the motion suppression portion is arranged so as to hang down from the middle of the inclined surface portion at a predetermined distance from the outer shell portion. The surface-type floating fish reef according to the present invention is also characterized in that a reinforcing plate is provided between the inclined surface portion and the motion suppression portion. The surface-type floating fish reef according to the present invention is also characterized in that the motion suppression section is provided with a plurality of holes. [Effects of the Invention]

[0011] The surface floating fish reef of the present invention has a compact structure and can suppress lateral swaying and other movements caused by wave forces at sea, because the resistance from seawater acts on the motion suppression section due to the movement of the motion suppression section in response to the motion of the floating body caused by waves, etc. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a front view showing a floating fish reef according to a first embodiment of the present invention. [Figure 2] 2(a) and (b) are respectively a partially enlarged cross-sectional view of part A in FIG. 1 and a bottom view of the floating fish reef of embodiment 1. [Figure 3] (a) and (b) are front views showing the state of a surface-type floating fish reef of embodiment 1 of the present invention when it is moving on the sea surface and the movement of seawater in the motion suppression section, and a front view showing the state of a surface-type floating fish reef without a motion suppression section when it is moving on the sea surface and the movement of seawater near the boundary between the outer shell section and the inclined surface section, respectively. [Figure 4] (a) and (b) are respectively an enlarged partial cross-sectional view of part A in Figure 1 showing another installation example of the motion suppression unit in the floating fish reef of embodiment 1, and a bottom view of a surface-type floating fish reef when the other installation example is adopted. [Figure 5] (a) to (c) are respectively an enlarged partial cross-sectional view of part A in Figure 1 when a reinforcing plate is provided between the motion suppression section and the inclined surface section in a surface-type floating fish reef of embodiment 1 of the present invention, and a bottom view showing an example of the installation of the reinforcing plate. [Figure 6] 1(a) and 1(b) are bottom views showing an example of installation in which motion suppression units are intermittently provided in a surface-type floating fish reef according to the first embodiment of the present invention. [Figure 7] 1 is a front view showing an example in which holes are provided in the motion suppression section of the surface-type floating fish reef according to the first embodiment of the present invention. FIG. [Figure 8] 1(a) and 1(b) are bottom views showing an example of installation of a motion suppressing unit when the surface floating body of the surface-type floating fish reef of the first embodiment according to the present invention has an oval shape (oval shape) in plan view. [Figure 9] FIG. 10 is a front view showing a surface-type floating fish reef according to a second embodiment of the present invention. [Figure 10] 10(a) and (b) are respectively a partially enlarged cross-sectional view of part B in FIG. 9 and a bottom view of the surface-type floating fish reef of the second embodiment. [Figure 11] 10(a) and 10(b) are bottom views showing an example of installation in which motion suppression units are intermittently provided in a surface-type floating fish reef according to a second embodiment of the present invention. [Figure 12] 10A and 10B are bottom views showing an example of installation of a motion suppressing unit when the surface floating body of the surface-type floating fish reef of the second embodiment according to the present invention has an oval shape (oval shape) in plan view. DETAILED DESCRIPTION OF THE INVENTION

[0013] The following describes embodiments 1 and 2 of the surface-type floating fish reef according to the present invention. Note that the embodiments 1 and 2 described below are merely examples of the present invention, and the present invention is not limited to the following embodiments 1 and 2, but can be modified as appropriate within the creative scope of the technical concept of the present invention.

[0014] Embodiment 1. The surface-type floating fish reef 1 of the first embodiment according to the present invention is configured to include a surface floating body 11 that floats in the ocean with a portion of it submerged below the water surface, and a mooring line 12 connected to the surface floating body 11. The mooring line 12 is configured to include an upper mooring chain 12a connected to the surface floating body 11, a mooring wire 12b connected to the lower end of the upper mooring chain 12a, and a lower mooring chain 12c connected to the lower end of the mooring wire 12b and to the upper end of an anchor 2 connected to the seabed, and the surface-type floating fish reef 1 is moored via the anchor 2 to prevent it from drifting away.

[0015] The surface floating body 11 normally has a deck portion 11a that protrudes above the sea surface, an outer shell portion 11b, a bottom portion 11c, an inclined surface portion 11d, a motion suppression portion 11e, etc., and is formed in an approximately circular shape when viewed from above.

[0016] A fence (handrail) 11a1 is provided on the deck section 11a, and a mast 11a2 is provided in the center surrounded by the fence (handrail) 11a1, and various lighting devices 11a3, antennas 11a4, etc. are provided on the upper end of the mast 11a2.

[0017] The outer shell portion 11b is a side surface portion that hangs down vertically from the outermost edge of the deck portion 11a to the inclined surface portion 11d.

[0018] The bottom surface portion 11c is the part corresponding to the bottom of the surface floating body 11, and is the surface facing the deck portion 11a, and is provided with a mooring rope connection portion 11c1 to which the upper mooring chain 12a of the mooring rope 12 is connected, multiple leg portions 11c2, etc.

[0019] The inclined surface portion 11d is a slope that slopes linearly or curves from the lower end of the outer shell portion 11b toward the bottom surface portion 11c, and is generally sloped toward the center of the bottom surface portion 11c, and is provided with a corrosion protection plate 11d1, etc. In this embodiment, the inclined surface portion 11d is linearly sloped from the lower end of the outer shell portion 11b toward the bottom surface portion 11c.

[0020] As shown in Figures 1 and 2(a), the motion suppression section 11e extends downward from the boundary between the lower end of the outer shell section 11b and the upper end of the inclined surface section 11d, being integral with the outer shell section 11b and flush with the outer shell section 11b, facing the inclined surface section 11d, and widens as it moves downward between the inclined surface section 11d.Since the surface floating body 11 is approximately circular in plan view, the motion suppression section 11e is provided continuously around the outer edge of the inclined surface section 11d, as shown in Figure 2(b).

[0021] Here, the protrusion length L (see Figure 2(a)), which is the vertical length of the motion suppression section 11e, is set to approximately 200 mm, for example, when the diameter R (see Figure 2(b)) of the surface floating body 11 is set to 8000 mm in the experiment.

[0022] Experiments have shown that when the protruding length L of the motion suppression section 11e is long, for example, about 400 mm, the longer the protruding length L of the motion suppression section 11e, the more seawater is moved by the motion suppression section 11e when the surface-type floating fish reef 1 is moved, increasing the resistance to motion. However, if the protruding length L of the motion suppression section 11e is increased, the pressure-receiving area against waves, currents, etc. increases, increasing the resistance to waves, currents, etc., and also increasing the burden on the mooring lines 12, requiring the strength of the mooring lines 12 to be increased, which undesirably increases the price of the surface-type floating fish reef 1 itself.

[0023] Therefore, as shown in Figure 3(a), when the surface-type floating fish reef 1 of embodiment 1 according to the present invention is swayed by waves or the like, the surface-type floating fish reef 1 of embodiment 1 is provided with a motion suppression section 11e so that the distance between it and the inclined surface section 11d widens as it goes downward. Therefore, the movement of the motion suppression section in conjunction with the motion of the float causes resistance from seawater to act on the motion suppression section, so that it is possible to suppress motion such as lateral swaying caused by wave forces at sea with a compact structure.

[0024] In contrast, in the case of a surface-type floating fish reef that does not have a motion suppression section 11e as shown in Figure 3(b), there is no part that provides resistance to seawater at the boundary between the inclined surface section 11d and the outer shell section 11b, so the motion of the floating fish reef cannot be suppressed. Note that in Figures 3(a) and (b), for the sake of simplicity, the antenna 11a4, mooring rope 12, etc. are not shown.

[0025] As described above, in the surface-type floating fish reef 1 of embodiment 1 according to the present invention, a motion suppression section 11e is provided which is integral with the outer shell section 11b from the boundary between the outer shell section 11b and the inclined surface section 11d, and extends downward while being flush with the inclined surface section 11d. Therefore, when the surface-type floating fish reef 1 moves, the movement of the motion suppression section in conjunction with the motion of the float causes resistance from seawater to act on the motion suppression section, so that motions such as lateral motion caused by wave forces at sea can be suppressed with a compact structure.

[0026] Furthermore, the motion suppression section 11e is integral with the outer shell section 11b and is arranged so as to hang down flush around the outer periphery of the surface floating body 11. This allows for a compact shape without protruding from the outer shell section 11b, while ensuring a maximum distance between the center of the surface floating body 11, which is the center of motion, and the motion suppression section 11e, which is the point where resistance is generated, thereby more effectively suppressing the motion of the floating fish reef 1.

[0027] In the surface-type floating fish reef 1 of the first embodiment described above, the motion suppression unit 11e is described as being integral with and flush with the outer shell portion 11b from the boundary between the outer shell portion 11b and the inclined surface portion 11d, but the present invention is not limited to this. For example, as shown in Figures 4(a) and 4(b), the inner peripheral surface (inner side) of the motion suppression unit 11e, which is separate from the outer shell portion 11b, may be joined to the outer peripheral surface (outer side) of the outer shell portion 11b by welding or the like. By providing the separate motion suppression unit 11e by welding or the like in this way, it becomes possible to easily provide the motion suppression unit 11e as a retrofit even on an existing surface-type floating fish reef that does not have the motion suppression unit 11e, as shown in Figure 3(b).

[0028] Furthermore, in the floating fish reef 1 of the first embodiment described above, the motion suppression portion 11e is not reinforced, but the present invention is not limited to this. For example, as shown in Fig. 5(a), four triangular reinforcing plates 11f may be arranged at 90-degree intervals from the center of the floating fish reef 1 as shown in Fig. 5(b), or eight reinforcing plates 11f may be arranged at 45-degree intervals from the center of the surface-type floating fish reef 1 as shown in Fig. 5(c), and reinforced by welding or the like to the surface of the inclined surface portion 11d and the motion suppression portion 11e. By providing the reinforcing plates 11f in this manner, the strength of the motion suppression portion 11e is improved, so that even if the motion suppression portion 11e is repeatedly subjected to resistance from seawater when the surface-type floating fish reef 1 moves, bending or deformation of the motion suppression portion 11e can be prevented, and the motion of the surface-type floating fish reef 1 can be quickly suppressed.

[0029] Furthermore, in the surface-type floating fish reef 1 of the first embodiment described above, the motion suppression portion 11e is provided continuously and uninterruptedly in a circular shape on the inclined surface portion 11d of the surface-type floating fish reef 1 as shown in Figures 1, 2(b), 3(a), and 4(b). However, the present invention is not limited to this. For example, as shown in Figures 6(a) and 6(b), the motion suppression portion 11e may be divided into multiple parts and provided partially. In Figure 6(a), the motion suppression portion 11e is divided into four parts with four notches, and in Figure 6(b), the motion suppression portion 11e is divided into two parts with two notches. When the inclined surface portion 11d is provided partially in this manner, when the surface-type floating fish reef 1 is moved by waves or the like, the interrupted portions of the inclined surface portion 11d cannot capture seawater and resist motion, resulting in a reduced motion suppression force. However, the interrupted portions of the inclined surface portion 11d are lighter, and therefore motion, such as lateral rolling, can be suppressed by the reduced weight. In this case, since the strength of the vibration suppression portion 11e is reduced by dividing the vibration suppression portion 11e into multiple parts and providing them partially, it is advisable to provide a reinforcing plate 11e between the inclined surface portion 11d and the vibration suppression portion 11e as shown in Figures 5(a) to (c).

[0030] Furthermore, in the surface-type floating fish reef 1 of the first embodiment described above, no special processing is performed on the motion suppression portion 11e. However, as shown in FIG. 7, for example, multiple holes 11g may be provided at predetermined intervals in the motion suppression portion 11e near the waterline or near the boundary between the outer shell portion 11b and the inclined surface portion 11d. Providing multiple holes 11g in the motion suppression portion 11e allows air that has entered the space S (see FIG. 2(a)) between the inclined surface portion 11d and the motion suppression portion 11e when the surface-type floating fish reef 1 moves to be expelled. This increases the amount of seawater captured by the motion suppression portion 11e, allowing the surface-type floating fish reef 1 to stabilize more quickly. In this case, since providing the holes 11g reduces the strength of the motion suppression portion 11e, it is even more preferable to provide a reinforcing plate 11e between the inclined surface portion 11d and the motion suppression portion 11e, as shown in FIGS. 5(a) to 5(c). 7, the antenna 11a4, the mooring rope 12, etc. are omitted from the illustration, as in FIGS. 3(a) and 3(b).

[0031] Furthermore, in the surface-type floating fish reef 1 of the first embodiment, the surface float 11 has been described as being circular in plan view, but the present invention is not limited to this. For example, it may be formed into an oval shape in plan view, as shown in Figures 8(a) and 8(b). In this case, since the outer shell portion 11b of the floating fish reef 1 has an oval shape, the motion suppression portion 11e can also be flush with the outer shell portion 11b and provided as a continuous oval shape as shown in Figure 8(a), or as an intermittent oval shape as shown in Figure 8(b). Note that even in the case of the motion suppression portion 11e shown in Figures 8(a) and 8(b), a reinforcing plate 11e or holes 11g may be provided.

[0032] Embodiment 2. In the floating fish reef 1 of the above-mentioned embodiment 1, the motion suppression portion 11e was described as being arranged so as to hang down flush with the outer shell portion 11b of the surface floating body 11, but the floating fish reef 1' of embodiment 2 according to the present invention is characterized in that it is arranged so as to have a motion suppression portion 11e' that protrudes downward from the middle of the inclined surface portion 11d by a length of about 200 mm, and the distance between it and the inclined surface portion 11d gradually increases as it goes downward, as shown in Figures 9 and 10(a) and (b).

[0033] Therefore, according to the surface-type floating fish reef 1' of embodiment 2, when the surface-type floating fish reef 1' is swayed by waves or the like, as in the case of the surface-type floating fish reef 1 of embodiment 1, the movement of the motion suppression section 11e' provided in the middle of the inclined surface section 11d in conjunction with the motion of the float causes resistance from seawater to act on the motion suppression section, so that motions such as lateral swaying caused by wave forces at sea can be suppressed with a compact structure.

[0034] Furthermore, in the surface-type floating fish reef 1' of embodiment 2, the distance between the center of the surface floating body 11, which is the center of motion, and the motion suppression section 11e', which is the point where resistance is generated, is smaller than in the case of the motion suppression section 11e of the surface-type floating fish reef 1 of embodiment 1, so the suppression force against motions such as lateral motion at sea is smaller, but since the length of the motion suppression section 11e' is shorter, the weight of the entire surface-type floating fish reef 1' can be reduced accordingly, and the more compact structure can suppress motions such as lateral motion caused by wave forces at sea.

[0035] In the description of the surface-type floating fish reef 1' of the second embodiment above, the motion suppression section 11e' was described as being provided continuously and uninterrupted in an annular shape on the inclined surface section 11d of the surface-type floating fish reef 1 as shown in Figures 9 and 10(a) and (b), but it is of course also possible to divide the motion suppression section 11e' and provide it in parts, as shown in Figures 11(a) and (b). In Figure 11(a), the motion suppression section 11e' is divided into four sections, with four notches, as in Figure 6(a), and in Figure 11(b), the motion suppression section 11e' is divided into two sections, with two notches, as in Figure 6(b).

[0036] Furthermore, in the surface-type floating fish reef 1' of the second embodiment, the surface floating body 11 has been described as being circular in plan view, but this is not limiting and the surface floating body 11 may be formed in an oval shape in plan view. In this case, since the outer shell portion 11b of the surface-type floating fish reef 1 has an oval shape, the motion suppression portion 11e' may be provided so as to continue from the middle of the inclined surface portion 11d in an oval shape as shown in Figure 12(a), or may be provided so as to partially extend from the middle of the inclined surface portion 11d in an oval shape as shown in Figure 12(b). [Explanation of symbols]

[0037] 1…Surface floating fish reef 11...Surface floating body 11a...Deck section 11a1...Fence (handrail) 11a2...Mast 11a3…Lighting device 11a4...antenna 11b...Outer shell 11c…Bottom part 11c1…Mooring cable connection part 11c2…legs 11d…Slanted surface part 1d1...Corrosion Plate 11e, 11e'... Vibration suppression section 11f...Reinforcement plate 11g…hole 12...Mooring rope 12a...Upper mooring chain 12b...Mooring wire 12c…Lower mooring chain 2...Anchor

Claims

1. A floating fish reef having a surface float that floats with a part of it submerged below the water surface, characterized in that the surface float is provided with an inclined surface portion that slopes downward toward the center, and has a motion suppression portion that extends downward facing the inclined surface portion, opening downward and providing resistance when the floating fish reef moves, suppressing the motion.

2. The floating fish reef according to claim 1, Furthermore, the inclined surface portion has an outer shell portion extending upward from the outermost side thereof, A floating fish reef characterized in that the motion suppression portion is flush with the outer shell portion or joined to the outer surface of the outer shell portion and hangs down.

3. Furthermore, the inclined surface portion has an outer shell portion extending upward from the outermost side thereof, A floating fish reef characterized in that the motion suppression portion is arranged to hang down from the middle of the inclined surface portion at a predetermined distance from the outer shell portion.

4. The floating fish reef according to claim 1, A floating fish reef characterized in that a reinforcing plate is provided between the inclined surface portion and the motion suppression portion.

5. The floating fish reef according to claim 1, A floating fish reef characterized in that the motion suppression section is provided with a plurality of holes.

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