JP6507431B2 - Wave power generator - Google Patents

Description

  The present invention relates to a wave power generator that generates power using energy when the float moves up and down, and more particularly to a wave power generator that can be miniaturized while improving power generation efficiency. is there.

  The column includes a column anchored in the water with the axial direction as the vertical direction, and a float arranged to be movable up and down along the column, and generates power using energy when the float moves up and down by waves. Various wave power generation devices have been proposed (see, for example, Patent Document 1).

  The wave power generator described in Patent Document 1 is moored by a pile mooring method in which a column is directly fixed to the seabed. In a relatively shallow water area, the wave power generator can be moored by this pile mooring method, but in a relatively deep water area, the length of the support becomes too long and the installation cost of the wave power generator increases. Therefore, in a relatively deep sea area, the anchor is sunk to the seabed and moored by a single cord tension mooring method in which the lower ends of the anchors and columns are connected by mooring ropes.

  As shown in FIG. 8, the conventional wave power generation device 1X moored by the single cord tension mooring method has a pillar 24 moored in a state where its upper end projects above the water surface, and a through hole through which the pillar 24 penetrates And a float 4X that moves up and down along the support column 24. A mooring rope 11 is connected to the lower end of the column 24 and the other end of the mooring rope 11 is connected to an anchor 12 sunk on the seabed.

  Further, in order to float the column 24 in water and to project the upper end thereof above the water surface, the buoyant body 25 is installed under the column 24. In order to make the annular float 4X move up and down smoothly along the column 24, the column 24 is required to be in the vertical state. In order to stabilize the posture of the upright support, conventionally, a huge buoyant body 25 having a size equal to or larger than that of the float 4X has been installed.

  When waves or wind collide with the float 4X disposed at the upper end of the column or the upper end of the column 24 protruding from the water surface, the column 24 supports the lower end to which the mooring rope 11 is connected as shown in FIG. It easily tilts as p. Since the column 24 has a center of gravity at a position higher than the fulcrum point p, when the column 24 is inclined, it is difficult to obtain a restoring force to restore the inclination. That is, the columns were anchored in water in a mechanically unstable state.

  When the column 24 is inclined, the float 4X is difficult to move up and down smoothly along the column 24, and the power generation efficiency of the wave power generation device 1X is reduced. Therefore, conventionally, by making the buoyant body 25 installed on the column 24 larger, a method of stabilizing the posture of the column 24 has been adopted. However, as described above, since the posture of the support 24 is mechanically unstable, even if the huge buoyant body 25 is installed on the support 24, it is insufficient to suppress the support 24 from tilting. . Therefore, it was difficult to improve the power generation efficiency of the wave power generation device 1X.

  Further, in order to stabilize the posture of the column 24, it is necessary to install a larger buoyant body 25. Therefore, it is difficult to stabilize the posture of the column 24 while miniaturizing the wave power generation device 1X. On the other hand, although it is possible to reduce the size of the buoyant body 25 required by reducing the float 4X, reducing the size of the float 4X reduces the amount of power generation of the wave power generation device 1X.

Japanese Patent Application Publication No. 2009-535565

  The present invention has been made in view of the above problems, and an object thereof is to provide a wave power generation device that can be miniaturized while improving power generation efficiency by a structure that stabilizes the posture of the wave power generation device. It is.

In order to achieve the above object, a wave power generation apparatus according to the present invention generates electric power using the relative movement of a floating body moving up and down by waves, a support anchored in water, and the floating body and the support. A wave power generation device having a power generation mechanism, wherein the floating body has a float floating on a water surface and a rod portion extending downward from the float to be erected, the rod portion being the rod portion in water The density is adjusted so that the buoyancy of the rod portion is smaller than the mass of the rod portion, and the support member is vertically penetrated, and the rod portion is vertically moved relative to the support member. The power generation mechanism generates power.

  According to the present invention, the rod portion is suspended from the float floating on the water surface, and the erected state in which the axial direction of the rod portion is vertical is mechanically stable, so that the rod portion has the axial direction It becomes easy to maintain the vertical state. The rod portion, which can easily maintain the standing state stably, can move up and down smoothly with respect to the support, so that the power generation efficiency of the wave power generator can be improved.

  This is advantageous for miniaturizing the wave power generation device because the conventionally installed buoyant body is not required to stabilize the posture.

  In addition, the rod part extending downward from the float floating on the water surface is always in the water and there is no part projecting from the water surface, so it is not influenced by the wind and is not influenced by the waves, stabilizing the attitude of the wave power generator. It is advantageous to

  The float can also consist of a sphere or an ellipsoid formed hollow.

  The power generation mechanism can also be configured to include a permanent magnet installed in the rod portion and a coil installed in the support. Since the permanent magnet moves up and down with the vertical movement of the floating body to repeatedly disturb the magnetic field near the coil, power can be generated by electromagnetic induction.

  The power generation mechanism includes a rack installed along the axial direction of the rod portion, a generator installed inside the support, and a pinion gear installed on the rotation shaft of the generator in a state of meshing with the rack. It can also be The rack-and-pinion can convert the vertical movement of the floating body into rotational movement to rotate the generator for power generation.

  The weight may be installed at the lower end portion of the rod portion. Since the mechanical stability is enhanced by installing the weight, it becomes easy to maintain the posture of the rod portion in the standing state.

A plurality of floats can be arranged for one support. According to this configuration, it is possible to increase the number of floating bodies that receive energy from the waves, which is advantageous for increasing the amount of power generation of the wave power generation device and increasing the scale. In addition, since it is sufficient to install a smaller number of supports in the water than the number of floating bodies, it is advantageous to reduce the cost and the number of steps of the installation work for installing the wave power generator.

  It may be configured to include a base to which a plurality of supports are fixed. Since the distance between the supports can be fixed by arranging the supports on the base portion, the density at which the supports and the floating body are arranged can be increased to increase the power generation of the wave power generator.

It is a perspective view which illustrates the outline of the wave power generator of the present invention. It is explanatory drawing which illustrates the support body shown in FIG. 1 in a cross section. It is a perspective view which illustrates the outline of the wave power generation device of a different embodiment. It is an explanatory view which illustrates a modification of a power generation mechanism. It is explanatory drawing which illustrates the wave power generator shown in FIG. 4 in an AA cross section. It is a perspective view which illustrates the outline of the wave power generation device of a different embodiment. It is explanatory drawing which illustrates the outline of the state which installed the support body in the base part. It is explanatory drawing which illustrates the outline of the conventional wave electric power generation apparatus. It is explanatory drawing which illustrates the state which the support | pillar of the conventional wave power generation device inclined.

  Hereinafter, the wave power generator of the present invention will be described based on the embodiment shown in the drawings.

  As illustrated in FIG. 1 and FIG. 2, the wave power generation device 1 of the present invention is placed in the water by mooring from the seabed by a floating body 2 that moves up and down following the up and down movement of waves, And a supporting body 3.

  The floating body 2 has a float 4 which floats on the water surface and which is vertically moved by a wave, and a rod portion 5 which extends downward from the lower surface of the float 4 and which is erected in water. The float 4 of this embodiment is formed in a spherical shape, and has a configuration in which a part thereof is projected on the water surface by buoyancy and the remaining part is submerged. The float 4 can be configured by, for example, filling a rubber float formed of rubber with a gas such as air or nitrogen gas. At the time of a typhoon, the gas filled rubber float can evacuate the gas and sink the entire float 4. Thereby, it can control that wave power generation device 1 is destroyed by the wave etc. at the time of a typhoon.

  The configuration of the float 4 is not limited to the above. For example, the shape can be an arbitrary shape such as an ellipsoid whose cross section is an ellipse, a substantially rectangular parallelepiped, or a substantially cubic shape. Further, the material forming the float 4 is not limited to rubber, and can be formed of any material such as plastic, carbon fiber reinforced plastic, glass fiber reinforced plastic, iron, aluminum or aluminum alloy.

  The rod portion 5 fixed to the lower surface of the float 4 is formed in a cylindrical shape, and is entirely submerged. The rod portion 5 can be made of, for example, an iron column or the like. The density of the rod portion 5 is adjusted to be equal to or greater than the density of seawater in the sea area where the wave power generation device 1 is installed. Therefore, in the water, the rod portion 5 does not receive a buoyancy larger than its mass and does not rise to the water surface. The axial length of the rod portion 5 is determined from the amplitude of the wave in the sea area where the wave power generator 1 is installed. For example, when the amplitude of the wave is about ± 2.0 m in the vertical direction, the axial length of the rod portion 5 is about 5.0 to 7.0 m.

  Since the float 4 floats in water and the rod portion 5 stops or sinks in water, the floating body 2 can easily maintain the posture in which the rod 4 is placed with the float 4 up. That is, the rod portion 5 has a stable posture in which the rod portion 5 is suspended from the float 4.

  The rod portion 5 is fixed to the float 4 in a state where an extension line of the central axis of the rod portion 5 passes the center of gravity of the float 4. Therefore, when the floating body 2 is floated in water, the posture in which the axial direction of the rod portion 5 is perpendicular to the horizontal plane is the dynamic stable posture of the floating body 2.

  The weight 6 may be installed at the lower end portion of the rod portion 5. The density of the weight 6 is adjusted to be larger than the density of seawater in the sea area where the wave power generation device 1 is installed. By installing the weight 6, the rod portion 5 is pulled upward by the float 4 at its upper end and pulled downward by the weight 6 at its lower end, which is advantageous for maintaining an upright posture in water.

  It is desirable that the weight 6 be formed, for example, in the shape of a rectangular parallelepiped or a cylinder, and the outer diameter of the weight 6 be larger than the inner diameter of the through hole 8 of the support 3. As a result, even if the floating body 2 rises more than expected due to the arrival of high waves, it is possible to prevent the rod portion 5 from coming off the support 3 and separating the floating body 2 and the support 3 from each other.

  The support 3 in this embodiment is a box disposed close to the rod 5 of the floating body 2, and the frame 7 is fixed below the support 3. The support 3 is provided with a through hole 8 penetrating the bottom surface from the top surface thereof, and the rod portion 5 is arranged to be able to move up and down along the through hole 8.

  The frame portion 7 has four columnar members 9 extending downward from four corners of the lower surface of the support 3 and a bottom plate 10 fixed to the lower end portion of the columnar members 9. The frame portion 7 is disposed in a state of covering the periphery of the rod portion 5 protruding and moving up and down from the lower side of the support 3, so that a drifting object or the like moving in water is prevented from colliding with the rod portion 5 it can. On the other hand, since the flow of water such as tidal current can pass through the frame portion 7, it is advantageous to reduce the external force in the horizontal direction generated in the frame portion 7 by this tidal current to stabilize the posture of the support 3 .

  The density of the whole of the support 3 and the frame portion 7 can be determined by setting the hollow structure inside the support 3 or installing the buoyancy body at the upper end of the support 3 or the frame portion 7 The density is adjusted to be equal to or smaller than the density of seawater or the like. Therefore, the support 3 does not sink in water. Since the whole of the support 3 is under the water surface, it is not necessary to set a large buoyant even if the buoyant is installed.

  The mooring rope 11 is connected to the bottom plate 10 of the frame portion 7, and the anchor 12 is installed at the other end of the mooring rope 11 and the support 3 is moored in water by sinking to the bottom of the water. That is, the support 3 of this embodiment is moored in a single cord mooring system.

  As illustrated in FIG. 2, the power generation mechanism 13 includes an annular core 14 disposed inside the support 3 and surrounding the outer peripheral surface of the rod portion 5, and a coil 15 wound around the core 14. A permanent magnet 16 installed on the rod portion 5 is provided.

  The permanent magnet 16 is embedded in the outer peripheral surface of the rod portion 5 and is disposed in a state where the outer surface of the permanent magnet 16 is flush with the outer peripheral surface of the rod portion 5. Since the permanent magnet 16 moves along with the vertical movement of the rod portion 5 to change the magnetic field around the coil 15, the power generation mechanism 13 can generate power by electromagnetic induction. Since the power generation mechanism 13 can perform power generation with the coil 15 and the permanent magnet 16 in a non-contact state, the support 3 can be configured in a watertight state. As a result, the core 14 and the coil 15 do not come in contact with water, which is advantageous for improving the durability.

The configuration in which the permanent magnet 16 is disposed is not limited to the above. For example, the permanent magnet 16 is disposed inside the rod portion 5 or the permanent magnet 16 is disposed in a state of projecting from the outer peripheral surface of the rod portion 5 be able to.

  It is also possible to fill the inside of the support 3 with a filler such as urethane foam. By adjusting the mass of the filler, the density of the entire support 3 can be adjusted. The filler can also protect the core 14 and the coil 15.

  The power generation mechanism 13 is connected to a power transmission cable 17 for sending electricity to a demand place such as land. The position of the support 3 anchored by the mooring rope 11 in water as shown in FIG. 1 hardly changes. By arranging the coil 15 of the power generation mechanism 13 on the support 3, the power transmission cable 17 connected to the power generation mechanism 13 can be easily fixed at any position in the water, so that the power transmission cable 17 can be efficiently laid. Is advantageous.

  The power generation mechanism 13 is not limited to the above-described configuration, as long as the power generation is performed from the relative vertical movement of the rod portion 5 with respect to the support 3. Alternatively, a hollow may be formed in the rod portion 5 and the coil 15 may be installed in the hollow and the permanent magnet 16 may be installed in the support 3.

  The plurality of coils 15 may be arranged side by side in the axial direction of the rod portion 5. As a result, the amount of power generation of the wave power generation device 1 can be increased. Further, a plurality of supports 3 may be arranged side by side in the axial direction of the rod portion 5. As a result, since electricity can be obtained from the coils 15 installed on the respective supports 3, the amount of power generation can be increased.

  Next, the operation of the wave power generation device 1 will be described. The float 4 moves up and down by the collision of waves generated on the water surface. As the float 4 moves up and down, the rod portion 5 fixed to the lower surface of the float 4 also moves up and down.

  Since the support 3 is moored to the sea bed by the mooring rope 11 and hardly moves up and down, the rod portion 5 moves up and down relative to the support 3. Since the permanent magnet 16 installed in the rod 5 repeatedly disturbs the magnetic field in the vicinity of the coil 15 installed in the support 3 by the vertical movement of the rod 5, electricity is generated in the coil 15. That is, the power generation mechanism 13 generates power by the vertical movement of the rod portion 5. This electricity is supplied to the demand point via the transmission cable 17.

  When an external force in the horizontal direction is generated on the floating body 2 by the collision of the waves, the floating body 2 is tilted about the fulcrum point p at the height of the waterline of the float 4. When the fulcrum point p of the float 4 is pushed in the horizontal direction by waves, there is no rotational moment M for rotating the rod portion 5 in the vertical plane about the fulcrum point p, so the rod portion 5 does not rotate and stands upright Can be maintained.

  A horizontal external force may also be generated on the submerged lower portion of the float 4 and the rod portion 5 due to waves or tidal currents. As illustrated in FIG. 1, the force F of waves and tides is smaller in the water than in the vicinity of the water surface. Therefore, for example, even if the rod portion 5 receives a force in the horizontal direction, the tilting of the rod portion 5 around the fulcrum p becomes small.

  Further, even if the rod portion 5 is rotated about the fulcrum point p, it is possible to obtain a restoring force returning to the erected state in which the axial direction is made vertical by its own weight. When the weight 6 is installed at the lower end portion of the rod portion 5, the restoring force is further increased. Since the posture in which the rod portion 5 is in the standing position in water is mechanically stable, it is easy to maintain the standing position. The rod portion 5 which maintains the standing state can move up and down smoothly with respect to the support 3, which is advantageous for improving the power generation efficiency of the wave power generation device 1.

In addition, since the entire rod portion 5 is always underwater and is not affected by the wind, it is easier to maintain the standing state significantly as compared with the conventional wave power generation device having a column protruding above the water surface.

  As illustrated in FIG. 9, the support 24 of the conventional wave power generation device 1X is configured to tilt with the lower end anchored to the seabed as the fulcrum p. Therefore, when an external force in the horizontal direction is generated on a separate float 4X installed at a position far from the fulcrum p, the support 24 is inclined due to a large rotational moment about the fulcrum p. Due to the structure that the supporting point p of the support 24 is at the lower end, even if the buoyant body 25 installed on the support 24 is enlarged to stabilize the posture of the support 24, the float 4X resists the horizontal force received from waves. It was difficult.

  The wave power generation device 1 of the present invention is advantageous for downsizing because the huge buoyant body, which has conventionally been installed to make the support upright, is not necessary. The miniaturization of the wave power generation device 1 improves the handling when transporting the wave power generation device 1 to a predetermined sea area.

  With the configuration in which the coil 15 of the power generation mechanism 13 is installed on the support 3 side, the rod portion 5 only needs to have a space for installing the permanent magnet 16, so the rod portion 5 can be formed thinner. As a result, the external force in the horizontal direction generated in the rod portion 5 due to the collision of the tidal current can be reduced, which is advantageous for maintaining the standing state of the rod portion 5.

  The wave power generation device 1 illustrated in FIG. 3 includes an ellipsoidal float 4A which has an elliptical cross section in the vertical direction and is spherical in plan view. That is, the float 4A has a shape obtained by compressing the spherical float 4 in the vertical direction. The float 4A, which has a vertical axis shorter than the horizontal axis, generates a reaction force against the rotational moment M about the pivot point p at the height of the draft line of the float 4A. It is further advantageous to maintain the standing condition of 5.

  In the case of the spherical float 4 illustrated in FIGS. 1 and 2, when a rotational moment M is generated in the floating body 2 around the fulcrum p, the float 4 is not changed in shape of the interface between the float 4 and water. Rotate. On the other hand, the float 4A illustrated in FIG. 3 has to rotate while pushing away water when a rotation moment M is generated to rotate the rod portion 5 in the vertical plane about the fulcrum p. That is, since the float 4A can obtain the reaction force against the rotational moment M from water, it becomes easy to maintain the standing state of the rod portion 5.

  The frame portion 7 in this embodiment includes a plate 18 which covers between the four columnar members 9 extending downward from the support 3. The installation of the plate 18 can prevent a drifting object moving in the water from colliding with the rod portion 5. Thereby, even if the rod portion 5 is formed to be thin, it is possible to prevent an accident in which the stray matter collides with the rod portion 5 and the rod portion 5 is deformed. In FIG. 3, the lower end portion of the rod portion 5, the weight 6, and the columnar member 9 are shown by broken lines for the sake of explanation.

  In this embodiment, the inside of the frame 7 is filled with water through the through holes 8 etc. However, the frame 7 may be made watertight to fill the inside with a gas such as air. it can. Thereby, the buoyancy generated in the support 3 can be increased. This increase in buoyancy increases the tension generated in the mooring rope 11, which is advantageous for stabilizing the posture of the support 3. Further, in this embodiment, since the support 3 is anchored by two mooring ropes 11, it is further advantageous for stabilizing the attitude of the support 3. As the number of mooring ropes 11 connected to the frame portion 7 is increased, the installation cost of the wave power generation device 1 increases, but the posture of the support 3 becomes easier to stabilize.

The wave power generation device 1 illustrated in FIGS. 4 and 5 has a support 3 having a shape in which a part of an annular shape formed by combining rectangles in a plan view is cut out. The support 3 is provided with a rectangular through hole 8 penetrating the bottom surface from the top surface, and a rod portion 5 formed in a prismatic shape is arranged along the through hole 8 so as to be vertically movable.

  The power generation mechanism 13 installed in the wave power generator 1 includes a generator 19 installed inside the hollow support 3 and a state where the generator 19 penetrates from the generator 19 to the outside of the support 3. , A pinion gear 21 installed at an end of the rotation shaft 20, and a rack 22 installed at the rod portion 5. The rotation shaft 20 is disposed in a state in which the axial direction is a horizontal direction orthogonal to the axial direction of the rod portion 5. In FIG. 4 and FIG. 5, the generator 19 disposed inside the support 3 and a part of the rotating shaft 20 are shown by broken lines for the purpose of explanation.

  The rack 22 is installed along the axial direction of the rod portion 5 on the surface of the prismatic rod portion 5 facing the pinion gear 21. The rack 22 moves along with the vertical movement of the floating body 2 and rotates the rotation shaft 20 of the generator 19 via the pinion gear 21 meshing with the rack 22. That is, the vertical movement of the floating body 2 is converted into rotational movement via the rack 22 and the pinion gear 21 and is converted into electricity by rotating the generator 19.

  Not only the above rack and pinion but also a conversion mechanism such as a timing belt or a ball screw may be used to convert the vertical movement of the floating body 2 into rotational movement and rotate the generator 19.

  The support 3 in this embodiment does not have the frame portion 7. Therefore, two mooring ropes 11 are directly connected to the support 3 and moored to the seabed. This configuration makes it possible to make the wave power generation device 1 smaller.

  The float 4B is an elliptical shape whose major axis is the direction from the upstream side to the downstream side of the wave in plan view and whose horizontal axis is orthogonal to the flow direction of the wave is the minor axis. The axis of direction is formed into a short oval.

  Since the float 4B is formed in an elliptical shape in plan view, the area of the side surface of the float 4B on the upstream side of the wave is reduced, and the float 4B is less likely to receive horizontal external force from the wave. This is further advantageous for maintaining the erected state of the rod portion 5.

  As illustrated in FIG. 6, a plurality of through holes 8 may be formed in one support 3, and the floating body 2 may be disposed in each of the through holes 8. The support 3 is formed of a large-sized rectangular parallelepiped box, and the frame 7 is not provided. The support 3 is moored by a plurality of mooring ropes 11.

  The arrangement of the plurality of floats 2 on one support 3 fixes the distance between the floats 2. Therefore, the floating bodies 2 do not collide with each other even if the floating bodies 2 are arranged in a narrow and dense state. As a result, the number of floating bodies 2 that can be installed per unit area can be increased, so that the amount of power generation per unit area in the sea area where the wave power generation device 1 is installed can be significantly increased.

  When installing this wave power generator 1 in water, the floating body 2 is previously installed in the support body 3, and the wave power generator 1 whole is arrange | positioned in water at one time. With this configuration, a plurality of floating bodies 2 can be arranged at one time, which is advantageous for shortening the process of installing the wave power generation device 1 and reducing the number of man-hours.

A plurality of supports 3 may be fixed to one base portion 23 as illustrated in FIG. 7. The base portion 23 is a structure configured by combining a plurality of columnar members. In this embodiment, the foundation portion 23 is anchored at its lower end portion to the anchor 12 and is moored by a pile mooring method directly fixed to the seabed. In a relatively deep water area, the base portion 23 may be configured to float and be moored by the mooring rope 11.

  Since the plurality of supports 3 can be fixed to one base portion 23 and integrated, the plurality of supports 3 can be arranged at one time when arranging the supports 3 in water. That is, by the structure which installs the several support body 3 in one foundation part 23, the process at the time of arrange | positioning the support body 3 in water can be shortened, and a man-hour can be reduced. Further, since the distance between the supports 3 can be fixed as in the embodiment of FIG. 6, the amount of power generation per unit area can be increased by arranging the supports 3 and the floating body 2 in a dense state.

  Since the support 3 is firmly fixed when the base portion 23 is laid on the seabed, the standing state of the rod portion 5 is maintained even if the weight 6 is not installed at the lower end portion of the rod portion 5 It becomes easy to do. In such a case, the weight 6 may be installed inside the float 4.

  Since the force which descent | falls of the float 4 becomes strong by this structure, it becomes easy to make the floating body 2 track a wave also to a wave with a short wavelength, and it can improve power generation efficiency. When installing the weight 6 on the float 4, it is possible to inject seawater etc. into the inside of the float 4 and use it as the weight 6.

  The wave power generator 1 of the present invention is only exposed to part of the float 4 on the water surface, and the rod portion 5 is always in the water, so it is not easily affected by waves. The external force generated on the rod portion 5 at the time of a typhoon is significantly smaller than that in the conventional case where a part of the support pillars protrudes above water, which is advantageous for avoiding the failure or the like of the wave power generation device 1 at the time of a typhoon.

REFERENCE SIGNS LIST 1 wave power generator 2 floating body 3 support 4, 4 A, 4 B float 5 rod 6 weight 7 frame 8 through hole 9 columnar member 10 bottom plate 11 mooring rope 12 anchor 13 power generation mechanism 14 core 15 coil 16 permanent magnet 17 power transmission Cable 18 Plate 19 Generator 20 Rotation shaft 21 Pinion gear 22 Rack 23 Base part p Support point M Rotational moment F Wave force

Claims (7)

What is claimed is: 1. A wave power generation apparatus comprising: a floating body that moves up and down by waves, a support that is anchored in water, and a power generation mechanism that generates power using relative movement of the floating body and the support.
The floating body has a float that floats on the water surface and a rod portion that extends downward from the float and is placed upright, and the rod portion has a smaller buoyancy than the mass of the rod portion in water. The density is adjusted to be in the state and the support body is vertically penetrated, and the power generation mechanism generates electric power based on the vertical movement of the rod portion with respect to the support body. Power generator. It has a frame portion installed below the support,
The frame portion has four columnar members extending downward from four corners of the lower surface of the support, and a bottom plate fixed to the lower end of the columnar member, and projects vertically from the lower side of the support. wave power generator according to claim 1, wherein the frame portion in a state covering the periphery of the rod portion is Ru is arranged to.   The wave power generator according to claim 1 or 2, wherein the power generation mechanism includes a permanent magnet installed in the rod portion and a coil installed in the support. The wave power generator according to claim 3 , wherein a filler is filled in the inside of the support.   The power generation mechanism includes a rack installed along an axial direction of the rod portion, a generator installed inside the support, and a pinion installed on a rotating shaft of the generator in a state of meshing with the rack The wave power generator according to claim 1 or 2 provided with a gear. The wave power generator according to any one of claims 1 to 5 which has a weight in a lower end part of said rod part. The float according to any one of claims 1 to 4, wherein the float is formed in an elliptical shape whose minor axis is a horizontal direction orthogonal to the flow direction of the wave, where the major axis is the direction from upstream to downstream of the wave in plan view. Wave power generator described in.

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