Wave-dissipating device

Abstract

To provide a wave-dissipating device capable of suppressing damage to a structure and suppressing deterioration of a landscape.SOLUTION: A wave-dissipating device is supported on a reference surface of a seabed and comprises a wave-dissipating mechanism that attenuates energy of seawater waves, and a moving mechanism that moves the wave-dissipating mechanism between a usage position on a seawater surface side and a retracted position closer to a reference surface side than the usage position.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a wave dissipating device. [Background technology]

[0002] Coastlines are gradually eroded by repeated exposure to wave energy. In order to prevent land erosion by waves, it is necessary to attenuate wave energy. For example, one known measure to attenuate wave energy is to stack and install concrete block structures, such as tetrapod-shaped structures, on coastlines or offshore, as described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-025532 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of the above-mentioned structure, when the wave energy increases due to the occurrence of a typhoon or strong wind, the wave energy may not be fully attenuated, and the structure may be damaged. Also, a part of the concrete block structure may protrude above the sea surface, which may spoil the view.

[0005] The present disclosure has been made in view of the above, and aims to provide a wave-dissipating device that can suppress damage to structures and suppress deterioration of the landscape. [Means for solving the problem]

[0006] The wave-dissipating device according to the present disclosure comprises a wave-dissipating mechanism that is supported on the seabed ground and that attenuates the energy of seawater waves, and a moving mechanism that moves the wave-dissipating mechanism between a usage position on the seawater surface side and a retracted position that is closer to the reference surface than the usage position. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a wave-dissipating device that can suppress damage to structures and suppress deterioration of the landscape. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of a wave dissipating device according to this embodiment. [Figure 2] FIG. 2 is a diagram showing an example of a wave dissipating device according to this embodiment. [Figure 3] FIG. 3 is a diagram showing another example of the wave dissipating device according to this embodiment. [Figure 4] FIG. 4 is a diagram showing another example of the wave dissipating device according to this embodiment. [Figure 5] FIG. 5 is a diagram showing another example of a wave dissipating device according to this embodiment. [Figure 6] FIG. 6 is a diagram showing another example of a wave dissipating device according to this embodiment. [Figure 7] FIG. 7 is a diagram showing another example of the wave dissipating device according to this embodiment. [Figure 8] FIG. 8 is a diagram showing another example of the wave dissipating device according to this embodiment. [Figure 9] FIG. 9 is a diagram showing another example of a wave dissipating device according to this embodiment. [Figure 10] FIG. 10 is a diagram showing another example of a wave dissipating device according to this embodiment. [Figure 11] FIG. 11 is a diagram showing another example of a wave dissipating device according to this embodiment. [Figure 12] FIG. 12 is a diagram showing another example of a wave dissipating device according to this embodiment. [Figure 13] FIG. 13 is a diagram showing another example of a wave dissipating device according to this embodiment. [Figure 14] FIG. 14 is a diagram showing another example of a wave dissipating device according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of a wave-dissipating device according to the present disclosure will be described with reference to the drawings. Note that the present invention is not limited to these embodiments. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially identical.

[0010] 1 and 2 are diagrams showing an example of a wave dissipating device 100 according to this embodiment. As shown in Fig. 1 and 2, the wave dissipating device 100 according to this embodiment includes a wave dissipating mechanism 10, a support portion 20, and a movement mechanism 30.

[0011] The wave dissipating mechanism 10 has, for example, a so-called Darrieus-type water turbine structure. The wave dissipating mechanism 10 has a base 11, a shaft 12, and blades 13. The wave dissipating mechanism 10 is supported on the seabed ground BS, which is the reference surface of the seabed, by a support 20 described below. The base 11 rotatably supports the shaft 12. The shaft 12 is rotatable about a central axis AX. A plurality of blades 13 are connected to the shaft 12 in the circumferential direction. The blades 13 are provided integrally with the shaft 12. As the shaft 12 rotates, the blades 13 rotate about the central axis AX. When the blades 13 receive seawater waves, they rotate about the central axis AX, converting the wave energy into rotational energy. This allows the wave energy to be attenuated. The wave dissipating mechanism 10 is not limited to the above configuration as long as it is configured to attenuate wave energy, and may be, for example, a tetrablock.

[0012] The support portion 20 supports the wave dissipating mechanism 10. The support portion 20 is supported on the seabed BS via, for example, a movement mechanism 30. The support portion 20 is, for example, columnar.

[0013] The moving mechanism 30 moves the wave dissipating mechanism 10 between a use position P1 and a retracted position P2. The use position P1 is a position in seawater on the sea surface SL side, where the wave dissipating mechanism 10 is used to attenuate wave energy. The retracted position P2 is a position in seawater on the seabed BS side, where the wave dissipating mechanism 10 is placed when not in use.

[0014] The moving mechanism 30 places the wave dissipating mechanism 10 at the use position P1 by placing the support part 20 in an upright position relative to the seabed BS. The moving mechanism 30 also places the wave dissipating mechanism 10 at the retracted position P2 by placing the support part 20 in a tilted position relative to the seabed BS. The moving mechanism 30 can switch the support part 20 between an upright position and a tilted position by rotating the support part 20 around an axis 31 that is aligned with the seabed BS. The moving mechanism 30 may have a locking mechanism for maintaining the support part 20 in each of the upright and tilted positions.

[0015] As shown in Fig. 1, the wave dissipating mechanism 10 can attenuate the energy of waves generated on the sea surface side of seawater by being placed at the usage position P1. Also, as shown in Fig. 2, the wave dissipating mechanism 10 can avoid the effects of waves when the energy of waves on the sea surface becomes large, for example, when a typhoon or strong wind occurs. This makes it possible to prevent damage to the wave dissipating device 100.

[0016] FIG. 3 is a diagram showing another example of a wave dissipating device according to this embodiment. In the wave dissipating device 100A shown in FIG. 3, the moving mechanism 30A has a cylinder mechanism 32 that supports the support unit 20 in an inverted orientation. The cylinder mechanism 32 is disposed tilted relative to the seabed BS. The cylinder mechanism 32 has a rod portion 32a and a cylinder portion 32b. The rod portion 32a is connected to the support unit 20. The cylinder portion 32b is rotatable around a shaft portion 32c that is parallel to the axis 31. The shaft portion 32c is supported by the seabed BS. The tilt angle of the support unit 20 can be adjusted by adjusting the position of the rod portion 32a and the tilt of the cylinder portion 32b. The height position of the wave dissipating mechanism 10 from the seabed BS can be adjusted by adjusting the tilt angle of the support unit 20. Note that instead of the cylinder mechanism 32, a torque actuator may be used to drive the support unit 20.

[0017] FIG. 4 is a diagram showing another example of the wave dissipating device according to the present embodiment. In the wave dissipating device 100B shown in FIG. 4, the moving mechanism 30B includes a damper mechanism 33 and a suspension 34 that support the support portion 20 in the inverted direction. Note that an example of the damper mechanism 33 and the suspension 34 is enlarged and shown in a part of FIG. 4. The damper mechanism 33 includes a rod portion 33a, a cylinder portion 33b, and a land portion 33c. The land portion 33c divides the inside of the cylinder portion 33b into a first chamber C1 and a second chamber C2. The land portion 33c has flow paths A1, A2 that communicate the first chamber C1 and the second chamber C2, and check valves B1, B2. The check valve B1 allows the flow of liquid from the second chamber C2 to the first chamber C1 in the flow path A1, and blocks the flow of liquid from the first chamber C1 to the second chamber C2. The check valve B2 allows the flow of liquid from the first chamber C1 to the second chamber C2 in the flow path A2, and blocks the flow of liquid from the second chamber C2 to the first chamber C1. The suspension 34 is disposed between the end portion of the cylinder portion 33b and the land portion 33c in the second chamber C2. The suspension 34 applies an elastic force to the land portion 33c. In the example shown in FIG. 4, the diameter of the flow path A1 is larger than the diameter of the flow path A2.

[0018] In this configuration, when the pressure for pressing the rod 33a toward the inside of the cylinder �b is PC1 < PC2 (pushing wave), the liquid in the cylinder 33b flows from the second chamber C2 to the first chamber C1 through the flow path A1. At this time, since the diameter of the flow path A1 is larger than the diameter of the flow path A2, the rod 33a can be quickly moved to the inside of the cylinder 33b as compared with the case of the pulling wave described later. Therefore, when a typhoon or the like occurs, the support portion 20 can be quickly toppled.

[0019] Furthermore, when the pressure exerted by the rod 33a toward the inside of the cylinder 33b is such that pressure PC1>PC2 (undertow), the liquid in the cylinder 33b flows from the first chamber C1 to the second chamber C2 via the flow path A2. At this time, because the diameter of the flow path A2 is smaller than the diameter of the flow path A1, the rod 33a can be moved more slowly toward the outside of the cylinder 33b than in the case of an undertow. As a result, the support part 20 rises more slowly than in the case of an undertow. By setting the time required for the support part 20 to rise to be longer than the wave period, the support part 20 can be maintained in a tilted state at all times during a typhoon or the like. Note that using surrounding seawater as the liquid in the cylinder 33b contributes to environmental conservation.

[0020] Figure 5 is a diagram showing another example of a wave dissipating device according to this embodiment. In the wave dissipating device 100C shown in Figure 5, the moving mechanism 30C has a receiving mechanism 35 and a counterweight 36. The receiving mechanism 35 receives seawater in the direction in which the support part 20 falls. The receiving mechanism 35 is provided, for example, on the base 11 of the wave dissipating mechanism 10. The counterweight 36 applies gravity to the support part 20 in the direction in which the support part 20 rises. The counterweight 36 is provided on the lower end of the support part 20. The support part 20 is supported rotatably about a shaft part 37 at a position above the part where the counterweight 36 is provided. The shaft part 37 is arranged along the seabed ground BS.

[0021] When the receiving mechanism 35 receives a wave that applies a moment to the support part 20 that is greater than the moment due to the counterweight 36, the support part 20 falls over. Note that, when the support part 20 falls over, an adjustment part may be provided to adjust the angle of the support part 20 so that a part of the support part 20 does not collide with the seabed BS. Furthermore, when the support part 20 falls over, a locking mechanism may be provided to maintain the support part 20 in the fallen state. In this case, the locking mechanism may be capable of being manually released.

[0022] Furthermore, when the receiving mechanism 35 receives a wave that applies a moment smaller than the moment caused by the counterweight 36 to the support part 20, the support part 20 does not fall over and remains upright.

[0023] In this way, the support part 20 can be switched between a reclined state and an upright state depending on the magnitude of the wave energy.

[0024] 6 and 7 are diagrams showing another example of a wave dissipating device according to this embodiment. In a wave dissipating device 100D shown in Figs. 6 and 7, a movement mechanism 30D has a lifting mechanism 38. The lifting mechanism 38 raises and lowers the wave dissipating mechanism 10 between the use position P1 and the retracted position P2, i.e., moves it up and down. As the lifting mechanism 38, for example, a cylinder mechanism or the like can be used.

[0025] The lifting mechanism 38 is disposed, for example, at the bottom of a hole HL formed in the seabed BS. With this configuration, when the wave-dissipating mechanism 10 is in use, the support part 20 is raised so that the wave-dissipating mechanism 10 is positioned at an in-use position P1 above the hole HL. When the wave-dissipating mechanism 10 is not in use, the support part 20 is lowered so that the wave-dissipating mechanism 10 is positioned at a retracted position P2 within the hole HL. Seawater waves or currents are unlikely to reach the retracted position P2 within the hole HL. This makes it possible to prevent damage to the wave-dissipating mechanism 10 due to the energy of waves or ocean currents in the event of a typhoon or strong wind, or when the seawater current becomes strong.

[0026] 8 and 9 are diagrams showing another example of a wave dissipating device according to this embodiment. In the wave dissipating device 100E shown in FIGS. 8 and 9, the moving mechanism 30E has a lifting mechanism 38. In the example shown in FIG. 7, no hole is provided in the seabed ground BS, and the lifting mechanism 38 is provided on the seabed ground BS. The wave dissipating device 100E further includes a wall portion 40. The wall portion 40 is arranged on the seabed ground BS to the side of the wave dissipating mechanism 10. Although FIG. 8 shows a configuration in which the wall portion 40 is arranged on one side of the wave dissipating mechanism 10, this configuration is not limited thereto, and the wall portion 40 may be arranged in multiple different directions relative to the wave dissipating mechanism 10. The wall portion 40 covers the side of the wave dissipating mechanism 10 arranged in the retracted position P2. The wall portion 40 is arranged so as to be higher than the upper end of the wave dissipating mechanism 10 arranged in the retracted position P2.

[0027] The wall portion 40 is configured so as to be switchable between an upright state and a tilted state by an inverting mechanism 41. The upright state is a state in which the wall portion 40 stands upright relative to the seabed ground BS so as to cover the sides of the wave dissipating mechanism 10. The tilted state is a state in which the wall portion 40 is tilted along the seabed ground BS. The inverting mechanism 41 can switch between the upright state and the tilted state by rotating the wall portion 40 around an axis 41a that is along the seabed ground BS. The inverting mechanism 41 may also have a rotation restricting part 41b that restricts rotation so that the wall portion 40 maintains the upright state and the tilted state.

[0028] In the wave dissipating device 100E, when the wave dissipating mechanism 10 is used, the wall portion 40 is brought into a tilted state by the inverting mechanism 41, and the support portion 20 is raised so that the wave dissipating mechanism 10 is disposed at the use position P1, as shown in Fig. 8. This allows the wave energy to be attenuated by the wave dissipating mechanism 10 on the water surface side of the seawater.

[0029] 9, when the wave-dissipating mechanism 10 is not in use, the wall portion 40 is placed in an upright position by the inverting mechanism 41, and the support portion 20 is lowered so that the wave-dissipating mechanism 10 is positioned at the retracted position P2 on the seabed ground BS side. In this state, the wall portion 40 covers the sides of the wave-dissipating mechanism 10 at the retracted position P2, making it difficult for seawater waves or currents to reach the retracted position P2. Therefore, when a typhoon or strong wind occurs, or when the seawater current becomes strong, it is possible to prevent the wave-dissipating mechanism 10 from being damaged by the energy of the waves or ocean currents.

[0030] 10 and 11 are diagrams showing another example of a wave dissipating device according to this embodiment. In a wave dissipating device 100F shown in Fig. 10 and 11, an inverting mechanism 41F has an interlocking mechanism 42 that switches the wall portion 40 between an upright state and a reclined state in conjunction with movement of the wave dissipating mechanism 10 between the use position P1 and the retracted position P2. The interlocking mechanism 42 has, for example, a wire 42a connected between the lower end of the support portion 20 or the lower end of the cylinder rod of the moving mechanism 30F and the wall portion 40, and a pulley 42b on the moving mechanism 30F side that guides the wire 42a.

[0031] With this configuration, when the wave-dissipating mechanism 10 is used in the wave-dissipating device 100F, the support part 20 is raised so that the wave-dissipating mechanism 10 is positioned at the use position P1, as shown in Figure 10, whereby the wire 42a is unwound and the wall part 40 falls over due to its own weight.

[0032] When the wave dissipating mechanism 10 is not in use, the wire 42a is retracted into the moving mechanism 30F by lowering the support part 20 so that the wave dissipating mechanism 10 is disposed at the retracted position P2, as shown in Fig. 11. As a result, the wire 42a pulls the wall part 40 in an upright direction, and the wall part 40 assumes an upright state. In this way, the wall part 40 can be switched between an upright state and a reclined state in conjunction with the raising and lowering movement of the wave dissipating mechanism 10, and therefore the power source used in the wave dissipating device 100F can be reduced.

[0033] Fig. 12 is a diagram showing another example of a wave dissipating device according to this embodiment. In a wave dissipating device 100G shown in Fig. 12, a wall portion 40G is formed in a shape that can rise up using the seawater flow ST as lift, for example, in a wing shape. The other configurations are the same as those of the wave dissipating device 100F shown in Fig. 10. With this configuration, the wall portion 40G can rise up using the seawater flow ST as lift, thereby reducing the burden on the movement mechanism 30G when moving the wall portion 40G.

[0034] 13 and 14 are diagrams showing another example of a wave dissipating device according to this embodiment. The wave dissipating device 100H shown in FIG. 13 differs from the above embodiment in the configuration of the wave dissipating mechanism 10H. The wave dissipating mechanism 10H shown in FIG. 13 includes a base 11H, a shaft 12H, and wing portions 13H. In this wave dissipating device 10H, the shaft portions 12H are arranged on both sides of one base 11H in the axial direction of the central axis AX. Furthermore, multiple wing portions 13H are provided on each shaft 12H. In this case, the dimension W of each wing portion 13H in the axial direction of the central axis AX can be half the dimension of the wing portion 13 in the above embodiment. This configuration provides a wave dissipating function twice the dimension W of each wing portion 13H, thereby increasing the strength and characteristic value of the wave dissipating mechanism 10H. Furthermore, the wing portions 13H can be easily fabricated.

[0035] The wave dissipating device 100I shown in FIG. 14 differs from the above-described embodiment in the configuration of the wave dissipating mechanism 10I. The wave dissipating mechanism 10I shown in FIG. 14 includes a base 11, a shaft 12, wing portions 13, and a ring-shaped member 14. The configurations of the base 11, shaft 12, and wing portions 13 are the same as those of the above-described embodiment. The ring-shaped members 14 are disposed on both sides of the central axis AX in the axial direction of the multiple wing portions 13, connecting the multiple wing portions 13. In other words, the multiple wing portions 13 are connected by the ring-shaped members 14 disposed on both sides of the central axis AX. This configuration increases the moment of inertia of the rotating portion (shaft 12, multiple wing portions 13, and ring-shaped member 14) relative to the base 11 compared to a configuration without the ring-shaped member 14, making it difficult for the rotating portion to stop rotating. Therefore, a configuration can be achieved in which the rotating portion can easily continue rotating despite fluctuations in wave flow velocity. Furthermore, by connecting the wing portion 13 at both ends in the axial direction of the central axis AX by ring-shaped members 14, the number of support points for the wing portion 13 increases, and the strength can be increased by sharing the load acting on the wing portion 13.

[0036] As described above, the wave-dissipating device according to the first aspect of the present disclosure comprises a wave-dissipating mechanism 10 that is supported on the seabed ground BS and that attenuates the energy of seawater waves, and a moving mechanism 30 that moves the wave-dissipating mechanism 10 between a usage position P1 on the seawater surface side and a retracted position P2 that is closer to the seabed ground BS than the usage position P1.

[0037] According to this configuration, the movement mechanism 30 can move the wave-dissipating mechanism 10 between the use position P1 on the sea surface side and the retracted position P2 on the seabed ground BS side depending on the magnitude of wave energy. This can prevent damage to the wave-dissipating mechanism 10. Also, since the wave-dissipating mechanism 10 can be kept positioned underwater so that it does not protrude above the water surface, the scenery is not damaged. Furthermore, even when the mechanism is installed in a deep location, by adjusting the use position P1 and the retracted position P2, there is no need to stack a large number of concrete blocks, which can prevent the facility from becoming too large.

[0038] The wave dissipating device according to the second aspect of the present disclosure is the wave dissipating device according to the first aspect, further comprising a columnar support portion 20 that supports the wave dissipating mechanism 10 on the seabed ground BS, and the moving mechanism 30 positions the wave dissipating mechanism 10 at the use position P1 by placing the support portion 20 in an upright position relative to the seabed ground BS, and positions the wave dissipating mechanism 10 at the retracted position P2 by placing the support portion 20 in a tilted position relative to the seabed ground BS.

[0039] According to this configuration, the wave dissipating mechanism 10 can be moved to the use position P1 and the retracted position P2 by placing the support part 20 in an upright or tilted position, so that the power and stroke required for movement can be reduced compared to, for example, a configuration in which the wave dissipating mechanism 10 is raised and lowered.

[0040] A wave dissipating device according to a third aspect of the present disclosure is the wave dissipating device according to the second aspect, wherein the movement mechanism 30 has a cylinder mechanism 32 that supports the support part 20 so that it can stand upright.

[0041] According to this configuration, the support part 20 can be appropriately moved in the inverted direction by the cylinder mechanism 32.

[0042] A wave dissipating device according to a fourth aspect of the present disclosure is the wave dissipating device according to the second aspect, wherein the movement mechanism 30 has a damper mechanism 33 and a suspension 34 that support the support part 20 so that the support part 20 can be inverted.

[0043] According to this configuration, the support part 20 can be appropriately moved in the inverted direction by the damper mechanism 33 and the suspension 34. In addition, the speed of movement in the inverted direction can be adjusted.

[0044] The wave dissipating device according to the fifth aspect of the present disclosure is the wave dissipating device according to the second aspect, in which the moving mechanism 30 has a receiving mechanism 35 that receives seawater in the direction in which the support part 20 falls, and a counterweight 36 that applies gravity to the support part 20 in the direction in which the support part 20 stands up.

[0045] According to this configuration, the support part 20 can be appropriately moved in the inverted direction by the receiving mechanism 35 and the counterweight 36.

[0046] A wave dissipating device according to a sixth aspect of the present disclosure is the wave dissipating device according to the first aspect, wherein the moving mechanism 30 has a lifting mechanism 38 that raises and lowers the wave dissipating mechanism 10 between the use position P1 and the retracted position P2.

[0047] According to this configuration, the wave dissipating mechanism 10 can be moved to the use position P1 and the retracted position P2 by raising and lowering it, thereby reducing the space required for operation compared to, for example, a configuration in which the wave dissipating mechanism 10 and the support part 20 are inverted.

[0048] The wave dissipating device of the seventh aspect of the present disclosure is the wave dissipating device of the sixth aspect, further comprising a wall portion 40 that is arranged to the side of the wave dissipating mechanism 10 on the seabed ground BS and covers the wave dissipating mechanism 10 arranged at the retracted position P2.

[0049] According to this configuration, waves or ocean currents directed toward the wave dissipating mechanism 10 arranged at the retracted position P2 can be blocked by the wall portion 40. This makes it possible to suppress damage to the wave dissipating mechanism 10 arranged at the retracted position P2.

[0050] The wave-dissipating device according to the eighth aspect of the present disclosure is the wave-dissipating device according to the seventh aspect, wherein the wall portion 40 has an inverting mechanism 41 that switches between an upright state in which it stands upright against the seabed ground BS so as to cover the sides of the wave-dissipating mechanism 10, and a tilted state in which it is tilted along the seabed ground BS, and the inverting mechanism 41 switches between the upright state and the tilted state by rotating the wall portion 40 around an axis portion 41a that is along the seabed ground BS.

[0051] According to this configuration, the inversion mechanism 41 can appropriately switch the wall portion 40 between an upright state and a reclined state.

[0052] The wave dissipating device according to the ninth aspect of the present disclosure is the wave dissipating device according to the eighth aspect, in which the inverting mechanism 41 has a linkage mechanism 42 that switches the wall portion 40 between an upright state and a retracted state in conjunction with the movement of the wave dissipating mechanism 10 between the use position P1 and the retracted position P2.

[0053] According to this configuration, the wall portion 40 can be switched between an upright state and a reclined state in conjunction with the movement of the wave-dissipating mechanism 10, so that the power used in the entire device can be reduced.

[0054] A wave dissipating device according to a tenth aspect of the present disclosure is the wave dissipating device according to the eighth or ninth aspect, wherein the inverting mechanism 41 has a rotation restricting portion 41b that restricts the rotation of the wall portion 40.

[0055] According to this configuration, by restricting the rotation of the wall portion 40, the wall portion 40 can be maintained in an appropriate position and posture.

[0056] A wave dissipating device according to an eleventh aspect of the present disclosure is the wave dissipating device according to any one of the eighth to tenth aspects, wherein the wall portion 40 is formed so as to be able to rise up using the flow of seawater as lift.

[0057] According to this configuration, the wall portion 40 can stand up by using the flow of seawater as lift, so that the power required to move the wall portion 40 can be saved.

[0058] The wave-dissipating device according to the twelfth aspect of the present disclosure is a wave-dissipating device according to any one of the first to eleventh aspects, in which the wave-dissipating mechanism 10 comprises a base 11, a shaft 12 rotatably supported on the base 11, and a plurality of wing portions 13 integrally connected to the shaft 12 and arranged circumferentially around the shaft 12.

[0059] According to this configuration, when the wing portion 13 receives waves from seawater, it rotates about the central axis AX, converting the energy of the waves into rotational energy. This allows the wave energy to be appropriately attenuated. The converted energy can be used for rotational energy storage in a reservoir with a pump, for example, or as mechanical power using an engine, or for generating electricity by driving a generator, but is not limited to these. That is, in one aspect of the present disclosure, the wave dissipating device can be a generator.

[0060] A wave dissipating device according to a thirteenth aspect of the present disclosure is the wave dissipating device according to the twelfth aspect, wherein the shaft portions 12H are arranged on both sides of one base portion 11H in the axial direction of the central axis AX.

[0061] This configuration provides a wave-dissipating function twice the dimension W of each wing portion 13H, thereby increasing the strength and eigenvalue of the wave-dissipating mechanism. In addition, the dimension of the wing portion 13H in the direction of the central axis AX can be reduced, making it easy to fabricate the wing portion 13H.

[0062] A wave dissipating device according to a fourteenth aspect of the present disclosure is the wave dissipating device according to the twelfth aspect, wherein the plurality of wing portions 13 are connected by ring-shaped members 14 arranged on both sides in the axial direction of the central axis AX.

[0063] With this configuration, the moment of inertia of the rotating parts (shaft 12, multiple wing parts 13, ring-shaped member 14) relative to base 11 is increased, making it difficult for the rotating parts to stop rotating. Therefore, it is possible to create a configuration in which the rotating parts can easily continue to rotate despite fluctuations in wave flow speed. Furthermore, by connecting wing parts 13 by ring-shaped member 14 at both ends in the axial direction of central axis AX, the number of support points for wing parts 13 increases, and the strength can be increased by sharing the load acting on wing parts 13.

[0064] The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the wave dissipating device is installed on the seabed ground BS as the seabed reference surface and moves up and down, but is not limited to this configuration. The wave dissipating device may be installed on the seabed wall WL as the seabed reference surface and move horizontally, for example. [Explanation of symbols]

[0065] 10 Wave-dissipating mechanism 11,11H base 12,12H,37,41a Shaft part 13,13H Wing section 14 Ring-shaped member 20 Support part 30,30A,30B,30C,30D,30E,30F,30G Moving mechanism 31 axes 32 Cylinder mechanism 32a, 33a Rod part 32b, 33b Cylinder section 33 Damper mechanism 33c Land Section 34 Suspension 35 Receiving mechanism 36 Counterweight 38 Lifting mechanism 40,40G wall 41,41F Inverted mechanism 41b Rotation restriction part 42 Interlocking mechanism 42a wire 42b Pulley 100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I Wave dissipating device AX center axis B1, B2 check valve BS submarine ground C1 Room 1 C2 2nd room HL Hole P1 Usage position P2 Evacuation position SL sea level WL submarine wall

Claims

1. a wave-dissipating mechanism that is supported on the seabed reference plane and attenuates the energy of seawater waves; a moving mechanism that moves the wave dissipating mechanism between a use position on the seawater surface side and a retracted position on the reference surface side of the use position; A wave-breaking device equipped with:

2. Further provided is a columnar support portion that supports the wave dissipating mechanism on the reference surface, The moving mechanism places the wave-dissipating mechanism at the use position by placing the support part in an upright position relative to the reference surface, and places the wave-dissipating mechanism at the retracted position by placing the support part in a tilted position relative to the reference surface. The wave dissipating device according to claim 1.

3. The moving mechanism has a cylinder mechanism that supports the support part so that it can stand upright. The wave dissipating device according to claim 2.

4. The moving mechanism has a damper mechanism and a suspension that supports the support part so that the support part can stand upright. The wave dissipating device according to claim 2.

5. The moving mechanism includes a receiving mechanism that receives the seawater in a direction in which the support portion falls, and a counterweight mechanism that applies gravity to the support portion in a direction in which the support portion rises. The wave dissipating device according to claim 2.

6. The moving mechanism has a lifting mechanism that lifts and lowers the wave dissipating mechanism between the use position and the retracted position. The wave dissipating device according to claim 1.

7. a wall portion that is disposed to the side of the wave dissipating mechanism on the reference plane and covers the wave dissipating mechanism that is disposed at the retracted position; The wave dissipating device according to claim 6.

8. The wall portion has an inverting mechanism that switches between an upright state standing with respect to the reference surface so as to cover the side of the wave dissipating mechanism and a downed state lying along the reference surface, The inverting mechanism switches between the upright state and the inverted state by rotating the wall portion around an axis along the reference plane. The wave dissipating device according to claim 7.

9. The inverting mechanism has a linkage mechanism that switches the upright state and the downright state of the wall portion in conjunction with movement of the wave dissipating mechanism between the use position and the retracted position. The wave dissipating device according to claim 8.

10. The inverting mechanism has a rotation restricting portion that restricts rotation of the wall portion. The wave dissipating device according to claim 8.

11. The wall portion is formed so as to be able to rise up by using the flow of seawater as lift. The wave dissipating device according to claim 8.

12. The wave dissipating mechanism includes: A base and a shaft portion rotatably supported on the base portion; a plurality of wing portions that are integrally connected to the shaft portion and are provided in the circumferential direction of the shaft portion; Equipped with The wave dissipating device according to claim 1.

13. The shaft portions are disposed on both sides of one of the base portions in the axial direction of the rotation shaft. The wave dissipating device according to claim 12.

14. The plurality of wing portions are connected by ring-shaped members disposed on both sides of the rotation axis of the shaft portion in the axial direction. The wave dissipating device according to claim 12.

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