Wave power generation device and wave power generation system

Abstract

Provided are a wave power generator and a wave power generation system that can prevent the housing of the wave power generator from becoming large even when the distance between the water surface and a power generation unit is large. [Solution] The wave power generator (10) comprises a float (50) at least a portion of which is capable of floating on the water surface (W) and which moves up and down in response to changes in the position of the water surface (W) caused by waves, a pulley (31), a rope (41) including an end (46) connected to the float (50) and which rotates the pulley (31) with the up and down movement of the float (50), and a power generator which converts the rotational motion of the pulley (31) into electricity. The wave power generator (10) comprises a weight (60), which is connected to an end (47) different from the end (46) of the rope (41). When the position of the float (50) changes, the load of the weight (60) pulls the rope (41), causing the pulley (31) to rotate.

Description

[Technical Field]

[0001] The present invention relates to a wave power generation device and a wave power generation system. [Background technology]

[0002] Patent Document 1 describes a wave power generator having a pressing part, a rod-shaped body, a frame part, a gear, a shaft, and a power generation part located on land. The pressing part, the rod-shaped body, and the frame part are fixed to one another. The power generation part, the rod-shaped body, the frame part, the gear, and the shaft are housed in a single housing. The pressing part is located on the water surface, and when the pressing part moves due to the force of the waves, the rod-shaped body and the frame part move. The frame part and the gear are meshed, and when the frame part moves, the gear rotates. The shaft is fixed to the gear. When the gear rotates, the shaft rotates. The power generation part includes a dynamo. When the shaft rotates, the dynamo generates electricity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-4606 Summary of the Invention [Problem to be solved by the invention]

[0004] In a wave power generator such as that described in Patent Document 1, the distance from the position where the power generating unit is located to the water surface where the pressing unit (floating body) is located can be large. In such cases, the housing (wave power generator) for fixing the power generating unit, rod-shaped body, frame unit, and gear inside ends up becoming large. Therefore, there is a need for a wave power generator and a wave power generation system that can prevent the wave power generator from becoming large even when the distance between the water surface and the power generating unit is large.

[0005] An object of the present disclosure is to provide a wave power generation device and a wave power generation system that can prevent the housing of the wave power generation device from becoming large even when the distance between the water surface and the power generation unit is large. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, a wave power generation device according to a first aspect of the present disclosure comprises: a float, at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the position of the water surface caused by waves; a first pulley; a motion transmission member which includes a first end connected to the float and rotates the first pulley by the up and down movement of the float, wherein at least the portion hooked on the first pulley is formed in the shape of a string, belt, or chain; and a power generation unit which converts the rotational motion of the first pulley into electricity.

[0007] A wave power generation system according to a second aspect is a wave power generation system including a plurality of wave power generation devices, each of which includes a float, at least a portion of which is floatable on the water surface and moves up and down in response to changes in the water surface position caused by waves, a first pulley, a motion transmission member including a first end connected to the float and rotating the first pulley with the up and down movement of the float, where at least the portion hooked on the first pulley is formed in a string, belt, or chain shape, a power generation unit that converts the rotational motion of the first pulley into electric power, and a first pulley housing that houses the first pulley and the power generation unit, and the plurality of first pulley housings arranged in the plurality of wave power generation devices are connected to each other by a connecting member. [Effects of the Invention]

[0008] According to the above configuration, even if the distance between the water surface and the power generating unit is large, it is possible to prevent the wave power generating device from becoming large in size. [Brief explanation of the drawings]

[0009] A brief description of the drawings will be provided after the description of the specification has been finalized. [Figure 1]FIG. 1 is a block diagram of a wave power generation system 100 according to a first embodiment. [Figure 2] FIG. 2 is a plan view of the inside of the housing 12 of the wave power generator 10 as seen from above. [Figure 3] FIG. 3 is a schematic diagram showing the configuration of the gear box 23. [Figure 4] FIG. 4 is a schematic diagram showing the configuration of the gear box 23. [Figure 5] FIG. 5 is a perspective view of the wave power generation device 10. [Figure 6] FIG. 6 is a side view of the wave power generation device 10. [Figure 7] FIG. 7 is a diagram showing the configuration of the rail member 70. As shown in FIG. [Figure 8] FIG. 8 is a diagram for explaining the change in the position of the floating body 850 and the change in the position of the weight 60 due to the movement of the water surface W. [Figure 9] FIG. 9 is a diagram for explaining the change in the position of the floating body 850 and the change in the position of the weight 60 due to the movement of the water surface W. [Figure 10] FIG. 10 is a plan view of the floating body 50. As shown in FIG. [Figure 11] FIG. 11 is a diagram showing the configuration of a wave power generator 10a according to a first modification of the first embodiment. [Figure 12] FIG. 12 is a diagram showing the configuration of a wave power generator 10b according to a second modification of the first embodiment. [Figure 13] FIG. 13 is a diagram showing the configuration of a wave power generator 10c according to a third modification of the first embodiment. [Figure 14] FIG. 14 is a diagram showing the configuration of a wave power generator 10d according to a fourth modification of the first embodiment. [Figure 15] FIG. 15 is a diagram showing the configuration of a wave power generator 10e according to a fifth modification of the first embodiment. [Figure 16] FIG. 16 is a diagram showing the configuration of a wave power generator 10f according to a sixth modified example of the first embodiment. [Figure 17] FIG. 17 is a diagram showing the configuration of a wave power generator 10g according to a seventh modification of the first embodiment. [Figure 18] FIG. 18 is a diagram showing the configuration of a wave power generator 10h according to an eighth modification of the first embodiment. [Figure 19] FIG. 19 is a diagram showing the configuration of a wave power generation device 210 according to the second embodiment. [Figure 20] FIG. 20 is a diagram showing the configuration of a wave power generation device 310 according to the third embodiment. [Figure 21] FIG. 21 is a diagram showing the configuration of a wave power generation device 310a according to a ninth modification of the third embodiment. [Figure 22] FIG. 22 is a diagram showing the configuration of a wave power generation device 310b according to a tenth modification of the third embodiment. [Figure 23] FIG. 23 is a diagram showing the configuration of a wave power generation device 310c according to an eleventh modification of the third embodiment. [Figure 24] FIG. 24 is a diagram showing the configuration of a wave power generator 310d according to a twelfth modification of the third embodiment. [Figure 25] FIG. 25 is a diagram showing the configuration of a wave power generator 310e according to a thirteenth modification of the third embodiment. [Figure 26] FIG. 26 is a diagram showing the configuration of a wave power generator 310e according to a thirteenth modification of the third embodiment. [Figure 27] FIG. 27 is a diagram showing the configuration of a floating body 350f according to a fourteenth modification of the third embodiment. [Figure 28] FIG. 28 is a diagram showing the configuration of a floating body 350g according to a fifteenth modified example of the third embodiment. [Figure 29] FIG. 29 is a diagram showing the configuration of a floating body 350h according to a sixteenth modification of the third embodiment. [Figure 30] FIG. 30 is a diagram showing the configuration of a wave power generation device 510 according to the fourth embodiment. [Figure 31] FIG. 31 is a diagram showing the configuration of a wave power generation device 610 according to the fifth embodiment. [Figure 32] FIG. 32 is a cross-sectional view of a wave power generation device 610 according to the fifth embodiment. [Figure 33]FIG. 33 is a diagram showing the configuration of a container 620 according to the fifth embodiment. [Figure 34] FIG. 34 is a diagram showing the configuration of a wave power generation device 710 according to the sixth embodiment. [Figure 35] FIG. 35 is a diagram showing the configuration of a wave power generation device 710 according to the sixth embodiment. [Figure 36] FIG. 36 is a cross-sectional view of a wave power generation device 710a according to a modification (seventeenth modification) of the sixth embodiment. [Figure 37] FIG. 37 is a diagram showing the configuration of a wave power generation device 810 according to the seventh embodiment. [Figure 38] FIG. 38 is a diagram showing the configuration of a wave power generation system 800 according to the seventh embodiment. [Figure 39] FIG. 39 is a diagram showing the configuration of a wave power generation system 800a according to an eighteenth modification of the seventh embodiment. [Figure 40] FIG. 40 is a diagram showing the configuration of a wave power generation system 800b according to a nineteenth modification of the seventh embodiment. [Figure 41] FIG. 41 is a diagram showing the configuration of a wave power generation system 800c according to a twentieth modification of the seventh embodiment. [Figure 42] FIG. 42 is a diagram showing the configuration of a wave power generation system 800d according to a twenty-first modified example of the seventh embodiment. [Figure 43] FIG. 43 is a diagram showing the configuration of a wave power generator 810e according to a twenty-second modified example of the seventh embodiment. [Figure 44] FIG. 44 is a diagram showing the configuration of a wave power generation system 800f according to a twenty-third modified example of the seventh embodiment. [Figure 45] FIG. 45 is a diagram showing the configuration of a wave power generation system 800g according to a twenty-fourth modification of the seventh embodiment. [Figure 46] FIG. 46 is a diagram showing the configuration of a wave power generation system 800h according to a twenty-fifth modified example of the seventh embodiment. [Figure 47] FIG. 47 is a diagram showing the configuration of a wave power generation system 800i according to a 26th modified example of the seventh embodiment. [Figure 48]FIG. 48 is a diagram showing the configuration of a wave power generation device 910 according to the eighth embodiment. [Figure 49] FIG. 49 is a diagram showing the configuration of a wave power generation device 910 according to the eighth embodiment. [Figure 50] FIG. 50 is a diagram showing the configuration of a wave power generation device 910 according to the eighth embodiment. [Figure 51] FIG. 51 is a diagram showing the configuration of a breakwater member 960a according to a 27th modified example of the eighth embodiment. [Figure 52] FIG. 52 is a diagram showing the configuration of a breakwater member 960b according to a 28th modified example of the eighth embodiment. [Figure 53] FIG. 53 is a diagram showing the configuration of a wave power generator 1010 according to the ninth embodiment. [Figure 54] FIG. 54 is a diagram showing the configuration of a wave power generation system 1100 according to the tenth embodiment. [Figure 55] FIG. 55 is a diagram for explaining the configuration of a wave power generation system 1200 according to the eleventh embodiment. [Figure 56] FIG. 56 is a diagram for explaining the configuration of a wave power generation system 1200 according to the eleventh embodiment. [Figure 57] FIG. 57 is a diagram illustrating the configuration of a wave power generation system 1300 according to a twenty-ninth modification of the eleventh embodiment. [Figure 58] FIG. 58 is a diagram illustrating the configuration of a wave power generation system 1300 according to a twenty-ninth modification of the eleventh embodiment. [Figure 59] FIG. 59 is a diagram illustrating the configuration of a wave power generation system 1300a according to a 30th modification of the 11th embodiment. [Figure 60] FIG. 60 is a diagram illustrating the configuration of a wave power generation system 1300b according to a thirty-first modified example of the eleventh embodiment. [Figure 61] FIG. 61 is a diagram illustrating the configuration of a wave power generation system 1300c according to a thirty-second modified example of the eleventh embodiment. [Figure 62] FIG. 62 is a diagram illustrating the configuration of a container 1420 according to the thirty-third modified example. [Figure 63]FIG. 63 is a diagram illustrating the configuration of a container 1420 according to a thirty-third modified example. [Figure 64] FIG. 64 is a diagram illustrating the configuration of a container 1420a according to a thirty-fourth modified example. [Figure 65] FIG. 65 is a diagram illustrating the configuration of a container 1420b according to a thirty-fifth modified example. [Figure 66] FIG. 66 is a diagram illustrating the configuration of a container 1420b according to a thirty-fifth modified example. [Figure 67] FIG. 67 is a diagram illustrating the configuration of a wave power generation device 1510 according to a thirty-sixth modified example. [Figure 68] FIG. 68 is a diagram illustrating the configuration of a wave power generation device 1610 according to the thirty-seventh modified example. [Figure 69] FIG. 69 is a diagram showing the configuration of a wave power generation device 1710 according to a thirty-eighth modified example. [Figure 70] FIG. 70 is a diagram showing the configuration of a floating body 1850 according to a thirty-ninth modified example. [Figure 71] FIG. 71 is a diagram showing the configuration of a floating body 1850a according to a fortieth modified example. [Figure 72] FIG. 72 is a diagram showing the configuration of a floating body 1850b according to a 41st modified example. [Figure 73] FIG. 73 is a diagram showing the configuration of a floating body 1850c according to a 42nd modified example. [Figure 74] FIG. 74 is a diagram showing the configuration of a wave power generation device 1910 according to a 43rd modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following embodiments, and appropriate design modifications can be made within the scope of the configuration of the present disclosure. In the following description, the same reference numerals are used in common between different drawings for identical parts or parts having similar functions, and repeated description thereof will be omitted. In addition, the respective configurations described in the embodiments and modified examples may be combined or modified as appropriate. In addition, to make the description easier to understand, the drawings referred to below show simplified or schematic configurations, and some components are omitted.

[0011] [First embodiment] (Overview of Wave Power Generation System 100) FIG. 1 is a block diagram of a wave power generation system 100 according to a first embodiment. The wave power generation system 100 is a system that converts wave energy into electric power. The wave power generation system 100 includes a plurality of wave power generation devices 10. A portion of the electric power output by the plurality of wave power generation devices 10 is converted by a power conversion device 101 to a voltage appropriate for a device 102 and supplied to the device 102. A portion of the electric power output by the plurality of wave power generation devices 10 is also converted by the power conversion device 101 to a voltage appropriate for a storage battery 103 and supplied to the storage battery 103. When the wave power generation system 100 is installed on a quay, the device 102 is, for example, a pier light or a light or electrical device in a facility on land.

[0012] (Configuration of wave power generation device 10) Fig. 2 is a plan view of the interior of the housing 12 of the wave power generator 10, viewed from above. As shown in Fig. 2, the wave power generator 10 includes a housing 20, a power generator 21, a flywheel 22, a gearbox 23, shafts 24 to 26, a pulley 31, a pulley 32, and a rope 40. The housing 20 has the power generator 21, the flywheel 22, the gearbox 23, the shafts 24 to 26, the pulley 31, the pulley 32, and a first portion 41 of the rope 40 arranged therein.

[0013] <Configuration of the power generating device 21 and the flywheel 22> Power generating device 21 includes a dynamo (not shown). When shaft 25 connected to the dynamo rotates, an electromotive force is generated in the dynamo, and power generating device 21 generates electricity. Flywheel 22 is fixed to shaft 25. Flywheel 22 has a disk shape and functions to stabilize the rotation of the dynamo in power generating device 21 by the moment of inertia generated by the rotation of shaft 25.

[0014] <Gearbox 23 configuration> As shown in FIG. 2, the shaft 24 and the shaft 25 are connected to the gear box 23. FIGS. 3 and 4 are schematic diagrams showing the configuration of the gear box 23. As shown in FIG. 3, when the pulley 31 rotates, the rotational force of the pulley 31 is transmitted to the ratchet gear 23a via the shaft 24, and as the ratchet gear 23a rotates, the gear 23b, the shaft 23c, the gear 23d, the gear 23e, the shaft 25, and the flywheel 22 rotate sequentially. Here, the rotational force transmitted to the flywheel 22 is transmitted to the dynamo of the power generating device 21 via the shaft 25 as the flywheel 22 rotates. Note that, although the rotational force transmitted to the gear 23e is transmitted to the ratchet gear 23f as the gear 23e rotates, the rotational direction of the ratchet gear 23f is restricted, and the ratchet gear 23f rotates freely.

[0015] 4, when pulley 31 rotates in the opposite direction to that in FIG. 3, the rotational force of pulley 31 rotates ratchet gear 23f, sequentially rotating gears 23e, 23d, 23b, and flywheel 22. The rotational force transmitted to flywheel 22 is transmitted to the dynamo of power generator 21 as flywheel 22 rotates. Note that, although the rotational force transmitted to gear 23b is transmitted to ratchet gear 23a as gear 23b rotates, the rotational direction of ratchet gear 23a is restricted, causing ratchet gear 23a to spin freely. As a result, gearbox 23 rotates shaft 25 in the same direction regardless of the rotational direction of pulley 31 (shaft 24).

[0016] <Configuration of pulleys 31 and 32> As shown in FIG. 2 , pulley 31 rotates around shaft 24 as the axis of rotation in response to the movement of rope 40. Rope 40 has a first portion 41 that is hung on pulley 31 and pulley 32. That is, first portion 41 connects pulley 31 and pulley 32. Pulley 32 rotates around shaft 26 as the axis of rotation in response to the movement of rope 40. Container 20 includes bottom plate 20a. Bottom plate 20a includes holes 20b and 20c. Rope 40 extends toward the outside (downward) of container 20 through holes 20b and 20c. Rope 40 is connected to float 50 and sinker 60 below container 20. That is, pulley 31 and pulley 32 are disposed in an upper position relative to float 50. Moreover, the pulley 31 is disposed closer to the quay wall S than the pulley 32.

[0017] <Configuration of beam member 27> Fig. 5 is a perspective view of the wave power generator 10. Fig. 6 is a side view of the wave power generator 10. Fig. 7 is a diagram showing the configuration of the rail member 70. Figs. 8 and 9 are diagrams for explaining changes in the position of the floating body 850 and changes in the position of the sinker 60 due to movement of the water surface W. Here, in the following explanation, the upward direction is the Z1 direction, the downward direction is the Z2 direction, the direction from the shore toward the open sea is the Y1 direction, the direction from the open sea toward the shore is the Y2 direction, the right direction as seen from the open sea is the X1 direction, and the left direction as seen from the open sea is the X2 direction.

[0018] 5 and 6, the wave power generation device 10 includes a plurality of beam members 27. The plurality of beam members 27 are fixed to the upper surface of the quay wall S. The plurality of beam members 27 are fixed to the quay wall S, for example, with anchor bolts. The housing body 20 is fixed to the plurality of beam members 27 so as to protrude from the quay wall S toward the sea and so as to hang down from the plurality of beam members 27.

[0019] <Configuration of the floating body 50 and the rail member 70> As shown in Figures 5 and 6, the wave power generator 10 includes a floating body 50 and a plurality of rail members 70. Figure 7 is a diagram for explaining the fixing of the floating body 50 to the rail members 70. As shown in Figure 6, the floating body 50 is configured so that at least a portion of it can float on the water surface W. For example, the floating body 50 is formed in the shape of a box with air sealed inside.

[0020] The multiple rail members 70 are fixed to the quay wall S by anchor bolts (not shown). As shown in FIG. 7, the rail members 70 are formed in an H-shape in a plan view. A member 71 (trolley) that fits into a groove in the rail member 70 is fixed to the surface of the float 50 facing the quay wall S. While movement of the member 71 in the horizontal direction is restricted, the member 71 is not fixed to the rail member 70 in the up-down direction. The member 71 is fixed to the float 50. For example, multiple members 71 are fixed to the float 50. This allows the float 50 to move in the up-down direction while movement in the horizontal direction is restricted.

[0021] FIG. 8 is a diagram illustrating the up and down movement of the floating body 50 due to changes in the height position of the water surface W. When waves move from the state shown in FIG. 6 toward the quay wall S (wave power generation device 10) from the offshore, the height position of the water surface W increases. As the water surface W rises, the floating body 50 increases in height due to buoyancy. Thereafter, the height position of the water surface W decreases, and as the water surface W decreases, the floating body 50 decreases in height. As a result, the floating body 50 moves up and down due to the waves.

[0022] As shown in FIG. 5, the floating body 50 includes an upper surface 52 having an inclined surface that slopes downward from the quay wall S toward the open sea. Even if waves run up on the floating body 50, the upper surface 52 can direct the water toward the open sea. The floating body 50 also includes a lower surface 53 having an inclined surface that slopes upward as it moves away from the rail member 70. As a result, the floating body 50 is pushed up by waves traveling from the open sea toward the quay wall S (rail member 70), so the amount of movement of the floating body 50 can be increased. As a result, the amount of power generated by the power generation device 21 can be increased.

[0023] Fig. 10 is a plan view of the floating body 50. As shown in Fig. 10, the floating body 50 has a shape in which the width decreases from the quay wall S toward the open sea in a plan view. With this configuration, when waves travel along the quay wall S, the water in the waves flows toward the open sea along the shape of the floating body 50, thereby preventing the floating body 50 from being subjected to a force that would pull it away from the rail member 70.

[0024] <Configuration of Weight 60> As shown in Fig. 5, the wave power generator 10 includes a sinker 60. The sinker 60 applies a load to the rope 40, thereby pulling the floating body 50 via the pulleys 31 to 34. This prevents the rope 40 from becoming loose. The weight of the sinker 60 is, for example, half or less of the weight of the floating body 50. However, the weight of the sinker 60 is not limited to this, and may be designed to be more than half the weight depending on the buoyancy of the floating body 50.

[0025] As shown in FIG. 6 , the weight 60 is disposed between the float 50 and the container 20 (pulleys 31 and 32) in the vertical direction. This prevents the weight 60 from sinking in the water. The weight 60 is disposed on the rail member 70 on which the float 50 is disposed so as to be movable up and down. The weight 60 is fixed to a member 71 disposed on the rail member 70. This allows the weight 60 to move up and down relative to the rail member 70 while its movement in the horizontal direction is restricted by the member 71, similar to the float 50 shown in FIG. 7 . The rail member 70 restricts the movement of the float 50 and the weight 60 in directions other than the vertical direction (horizontal direction). Furthermore, since the float 50 and the weight 60 are disposed on the same rail member 70, the number of rail members 70 can be reduced compared to when the float 50 and the weight 60 are disposed on separate rail members 70.

[0026] As shown in FIG. 6 , the weight 60 has an upper surface 62 and a lower surface 63. The upper surface 62 has an inclined surface that is inclined with respect to the horizontal plane. For example, the upper surface 62 has a mountain-like shape with an apex at the center. The lower surface 63 also has a mountain-like shape with an apex at the center. As a result, the weight 60 has a shape that tapers upward and downward in a side view. This reduces air resistance when the weight 60 moves up and down. As a result, the resistance to the rotation of the pulley 31 is reduced, and the amount of power generated by the power generation device 21 can be increased.

[0027] <Configuration of pulley 33, pulley 34, and container 29> As shown in FIG. 6 , the wave power generator 10 includes a pulley 33 and a pulley 34 disposed below the float 50, and a box-shaped container 29 that houses the pulleys 33 and 34. The pulley 33 is disposed below the pulley 31 and is disposed closer to the quay wall S than the pulley 34. A fourth portion 44 of the rope 40 is hung between the pulley 33 and the pulley 34. The pulleys 33 and 34 are fixed to the container 29, which is fixed to the quay wall S. The container 29 also includes an upper surface 29a that slopes downward as it moves away from the rail member 70. When waves travel along the upper surface 29a, the water surface W near the float 50 tends to rise, thereby increasing the amount of movement of the float 50. This increases the amount of power generated by the power generator 21.

[0028] <Composition of Rope 40> As shown in FIG. 6 , the rope 40 includes a second portion 42, a third portion 43, a fourth portion 44, and a fifth portion 45. The second portion 42 extends downward from the housing 20 (hole 20b) and is connected to the fourth portion 44. The third portion 43 extends downward from the housing 20 (hole 20c). The third portion 43 also includes an end portion 47 fixed to a hook 61 disposed on an upper surface 62 of the sinker 60. The fourth portion 44 is a portion of the rope 40 that is hooked on the pulleys 33 and 34, and a portion of the fourth portion 44 is disposed below the pulleys 33 and 34. The fifth portion 45 extends upward from the pulley 34 (toward the float 50). The fifth portion 45 includes an end portion 46 fixed to a hook 51 disposed on the lower surface 53 of the float 50. As a result, rope 40 extends downward from floating body 50, and is arranged across (via) pulley 34, pulley 33, pulley 31, and pulley 32, and connected to sinker 60 (arranged in an S-shape). As a result, when floating body 50 rises, rope 40 moves, and sinker 60 rises. When floating body 50 descends, rope 40 moves, and sinker 60 descends. Then, as rope 40 moves, pulley 31 rotates, and the energy of the rotational motion is converted into electricity (power generation) by power generation device 21.

[0029] In this way, the movement of the rope 40 can transmit the motion of the floating body 50 to the power generation device 21. Because the rope 40 is string-like, no housing is required to house the rope 40. This makes it possible to prevent the wave power generation device 10 from becoming larger even if the distance between the water surface W on which the floating body 50 is placed and the power generation device 21 is large. For example, even if the distance between the top surface of the quay S and the water surface W is large, it is possible to prevent the wave power generation device 10 from becoming larger. Furthermore, the distance between the water surface W and the power generation device 21 varies depending on the installation location of the wave power generation device 10, but by changing the length of the rope 40 according to the distance between the water surface W and the power generation device 21, the wave power generation device 10 can be installed in a variety of installation locations.

[0030] Here, the speed at which the water surface W rises due to waves is slower than the speed at which the water surface W falls after the waves have passed. Therefore, when a float is suspended from above by a rope, if the water surface rises more rapidly than the speed at which the pulley rotates, slack will occur in the rope. If the float descends during the period when slack occurs, it becomes difficult to convert the up and down movement of the float into rotational movement of the pulley. In contrast, in the first embodiment, when the float 50 rises, the rope 40 is pulled upward, so that even if the water surface W rises sharply, the rope 40 does not slacken and the pulley 31 rotates. As a result, the amount of power generated by the power generation device 21 can be increased.

[0031] <Configuration of Elastic Member 80> As shown in Figure 6, the wave power generator 10 includes an elastic member 80 that connects the sinker 60 and the floating body 50. Even if the position of the floating body 50 changes suddenly, the elastic member 80 allows the position of the sinker 60 to change in accordance with the movement of the floating body 50. The elastic member 80 is formed, for example, by a spring. However, the elastic member 80 is not limited to this and may be formed by rubber. As a result, it is possible to prevent slack from occurring in the rope 40 that connects the floating body 50 and the sinker 60 via the pulleys 31, 32, 33, and 34.

[0032] <Configuration of box member 28> As shown in Figure 6, the wave power generator 10 includes a box member 28 that houses a portion of the rail member 70, including the upper end 72, and has an open bottom. The housing 20 that houses the power generator 21, pulleys 31, and pulleys 32 is disposed above the box member 28. The box member 28 is fixed to the housing 20. The housing 20 and the box member 28 are formed continuously, and all of the box member 28 except for its bottom is sealed. In other words, even if water attempts to seep in from the bottom side of the box member 28, the water will not seep in because there is no escape route for the air inside the box member 28 and the housing 20.

[0033] FIG. 9 is a diagram illustrating the position of the float 50 when the water surface W is higher than the bottom surface of the box member 28. When relatively large waves occur and the water surface W is higher than the bottom surface of the box member 28, as shown in FIG. 9, the box member 28 and the container 20 have no escape route for the air inside the box member 28 and the container 20, so water does not enter. As a result, the water surface Wa inside the box member 28 is lower than the water surface W. For example, the water surface Wa is located near the bottom surface of the box member 28. As a result, even if the float 50 and the sinker 60 move toward the upper end 72 of the rail member 70, the float 50 and the sinker 60 can be stopped from rising inside the box member 28. The float 50 stops rising near the water surface Wa. This prevents the float 50 and the sinker 60 from colliding with the pulleys 31 and 32.

[0034] [First to Eighth Modifications of the First Embodiment] Next, modified examples (first to eighth modified examples) of the first embodiment will be described. Note that, in the following, the same components as those described above in the first embodiment etc. will be assigned the same reference numerals and description thereof will be omitted.

[0035] (First Modification) FIG. 11 is a diagram showing the configuration of a wave power generator 10a according to a first modified example of the first embodiment. In the present disclosure, as in the wave power generator 10a according to the first modified example shown in FIG. 11, an elastic member 80a may be arranged on the rope 40a. For example, the elastic member 80a is arranged on the third portion 43 of the rope 40a (the portion between the pulley 32 and the weight 60). The elastic member 80a is formed, for example, by a spring member. Note that the elastic member 80a is not limited to a spring member and may be made of a rubber material. This makes it possible to prevent the portion of the rope 40a between the pulley 32 and the weight 60 from slackening.

[0036] (Second Modification) FIG. 12 is a diagram showing the configuration of a wave power generator 10b according to a second modification of the first embodiment. In the present disclosure, as in the wave power generator 10b according to the second modification shown in FIG. 12, an elastic member 80b may be arranged on the rope 40b. For example, the elastic member 80b is arranged on the second portion 42 of the rope 40b (the portion between the pulley 31 and the pulley 33). The elastic member 80b is formed, for example, by a spring member. Note that the elastic member 80b is not limited to a spring member and may be made of a rubber material. This makes it possible to prevent the portion of the rope 40b between the pulley 31 and the pulley 33 from slackening.

[0037] (Third Modification) Fig. 13 is a diagram showing the configuration of a wave power generator 10c according to a third modified example of the first embodiment. In the present disclosure, as in the wave power generator 10c according to the third modified example shown in Fig. 13, elastic members 80, 80a, and 80b may be arranged on the rope 40c. This makes it possible to prevent the rope 40b from slackening.

[0038] (Fourth Modification) Fig. 14 is a diagram showing the configuration of a wave power generator 10d according to a fourth modified example of the first embodiment. In the present disclosure, as in the wave power generator 10d according to the fourth modified example shown in Fig. 14, a tensioner 80c may be provided that presses the third portion 43 of the rope 40c in the horizontal direction. This makes it possible to prevent the rope 40c from slackening.

[0039] (Fifth Modification) FIG. 15 is a diagram showing the configuration of a wave power generator 10e according to a fifth modification of the first embodiment. In the first embodiment, the pulley 31 and the pulley 32 are configured to rotate around separate shafts as their rotation axes. However, as in the wave power generator 10e according to the fifth modification shown in FIG. 15, the pulleys 31e and 32e may be configured to rotate around a common shaft 24e as their rotation axis. That is, the shaft 24e passes through the pulleys 31e and 32e. The wave power generator 10e also includes a rope 40ea connected to the floating body and a rope 40eb connected to the sinker. That is, in the fifth modification, unlike the first embodiment, separate ropes are provided for the pulleys 31e and 32e. The rope 40ea is fixed to the shaft of the pulley 31e. The rope 40eb is fixed to the shaft of the pulley 32e.

[0040] (Sixth Modification) FIG. 16 is a diagram showing the configuration of a wave power generator 10f according to a sixth modified example of the first embodiment. In the fifth modified example, separate ropes are provided for the pulleys 31e and 32e, but the present disclosure is not limited to this. As in the wave power generator 10f according to the sixth modified example shown in FIG. 16, a common rope 40f may be provided for the pulleys 31e and 32e. In this case, for example, a through-hole 24fa is provided in the shaft 24f that passes through the pulleys 31e and 32e, and the rope 40f is disposed within the through-hole 24fa. This prevents the rope 40f from slipping relative to the pulleys 31e and 32e.

[0041] (Seventh and Eighth Modifications) FIG. 17 is a diagram showing the configuration of a wave power generator 10g according to a seventh modified example of the first embodiment. FIG. 18 is a diagram showing the configuration of a wave power generator 10h according to an eighth modified example of the first embodiment. In the first embodiment, an example was described in which the first portion 41 was configured using a rope (string-like member), but the present disclosure is not limited to this. For example, as in the wave power generator 10g according to the seventh modified example shown in FIG. 17, the first portion 41g of the operation transmission member 40g, which is engaged between the pulleys 31g and 32g, is configured in a chain-like manner. Furthermore, the pulleys 31g and 32g each have a plurality of teeth that mesh with the first portion 41g. The pulleys 31g and 32g are sprockets. Note that the fourth portion 44g of the operation transmission member 40g, which is engaged between the pulleys 33g and 34g, may also be configured in a chain-like manner.

[0042] Furthermore, as in a wave power generator 10h according to an eighth modified example shown in Fig. 18, the operation transmission member 40h is configured in a band shape (a belt). The operation transmission member 40h is hung on a pulley 31h, a pulley 32h, a pulley 33h, and a pulley 34h.

[0043] [Second embodiment] Next, the configuration of a wave power generator 210 according to a second embodiment will be described with reference to Fig. 19. Fig. 19 is a diagram showing the configuration of the wave power generator 210 according to the second embodiment. As shown in Fig. 19, the wave power generator 210 includes a pulley 231, a flywheel 222, and a housing body 220. The housing body 220 houses the pulley 231 and the flywheel 222. A cushioning material 220b is disposed at the lower end of the housing body 220. The cushioning material 220b is made of, for example, a rubber material such as a tire. The pulley 231 is connected to the flywheel 222 and the power generator (not shown) via a shaft (not shown) and a gearbox. The housing body 220 is fixed to, for example, a quay wall.

[0044] 19 , the wave power generator 210 includes a pulley 232, a rope 240, a float 250, a first load member 290, a connecting member 291, a connecting member 292, and a second load member 293. The pulley 232 is disposed below the float 250. The pulley 232 is fixed onto the second load member 293. The first load member 290 is disposed below the second load member 293. The connecting member 292 is a string-like or chain-like member that connects the first load member 290 and the second load member 293. The connecting member 291 connects the first load member 290 and the housing 220. One end of the connecting member 291 is fixed to the upper surface of the first load member 290, and the other end of the connecting member 291 is fixed to the bottom surface 220a of the housing 220. The first load member 290 is placed on the seabed G. Although the seabed G is given as an example, the wave power generation device 210 may be placed in a location other than the sea (for example, a lake or a river), and when the wave power generation device 210 is placed in a lake or river, the first load member 290 is placed on the lake or river bottom.

[0045] The rope 240 includes an end 247 connected to a hook 251 arranged on the upper surface of the float 250. The rope 240 extends upward from the end 247, passes through the pulley 231, extends downward, passes through the pulley 232, and extends upward from the pulley 232. The rope 240 includes an end 246 connected to a hook 252 arranged on the lower surface of the float 250. As a result, when the float 250 rises as the water surface W rises, the rope 240 is pulled by the hook 252. When the float 250 descends as the water surface W descends, the rope 240 is pulled by the hook 251. As a result, unlike the first embodiment, the rope 240 can be moved and the pulley 231 can be rotated without providing a weight.

[0046] As shown in FIG. 19 , in the second embodiment, the float 250 includes a hole 253a in which a portion of the rope 240 is disposed. The hole 253a is a through-hole through which the rope 240 passes in the vertical direction. With this configuration, the rope 240 comes into contact with the inner surface of the hole 253a of the float 250, thereby preventing the float 250 from moving in the horizontal direction. Furthermore, by disposing the rope 240 in the hole 253a, the area (horizontal dimension) in which the rope 240 and the float 250 are disposed can be reduced. As a result, the wave power generation device 210 can be made smaller.

[0047] 19, the float 250 has a hole 253b in which a part of the connecting member 291 is disposed. That is, the connecting member 291 penetrates the float 250 in the up-down direction via the hole 253b. This allows the float 250 to function as a guide for movement (up-down movement) between the pulleys 231 and 232. This makes it possible to prevent the float 250 from moving (wobbling) in the horizontal direction.

[0048] 19, the float 250 has a recess 255 that is recessed toward the inside of the float 250 and into which water enters. The recess 255 is recessed from the bottom surface of the float 250 toward the top. This allows the weight of the water to be applied to the float 250, so that the speed at which the float 250 descends can be increased. Furthermore, unlike the case where a metal member (weight) is provided inside the float 250, the water around the float 250 can be used, so that the material of the wave power generation device 210 can be reduced.

[0049] 19, the floating body 250 includes a member 253 in which holes 253a and 253b are formed. The member 253 includes, for example, a flexible hose (containing resin, rubber, or the like). Lower ends 253c and 253d of the member 253 (hose) are disposed at positions lower than a lower end 254 of the edge of the recess 255. This prevents air from entering the recess 255 through the holes 253a and 253b, even if the water surface W drops below the bottom surface (the highest part) of the recess 255. Therefore, the floating body 250 can descend quickly due to the weight of the water disposed in the recess 255.

[0050] [Third embodiment] Next, the configuration of a wave power generator 310 according to a third embodiment will be described with reference to Fig. 20. Fig. 20 is a diagram showing the configuration of a wave power generator 310 according to the third embodiment. As shown in Fig. 20, unlike the second embodiment, the wave power generator 310 is provided with a weight 360 connected to a rope 340.

[0051] As shown in Fig. 20, the wave power generator 310 includes a rope 340, a floating body 350, and a sinker 360. The rope 340 is arranged across the pulley 231 and the pulley 232. The end of the rope 340 extending downward from the pulley 231 is connected to the sinker 360. The end of the rope 340 extending upward from the pulley 232 is connected to the floating body 350. The other configurations are the same as those of the second embodiment.

[0052] [Ninth to Sixteenth Modifications of the Third Embodiment] Next, modifications (9th to 16th modifications) of the third embodiment will be described.

[0053] (Ninth Modification) FIG. 21 is a diagram showing the configuration of a wave power generator 310a according to a ninth modification of the third embodiment. As shown in FIG. 21, instead of the connecting member 291 according to the third embodiment, the wave power generator 310a includes a rod member 391a that passes through the hole 253b. The rod member 391a is fixed to the first load member 290. Unlike the third embodiment, the rod member 391a is not fixed to the housing 220. The rod member 391a is flexible. The rod member 391a is made of, for example, carbon fiber reinforced plastic. However, the rod member 391a is not limited to this and may be made of bamboo or the like.

[0054] (Tenth Modification) FIG. 22 is a diagram showing the configuration of a wave power generator 310b according to a tenth modification of the third embodiment. As shown in FIG. 22, the wave power generator 310b according to the tenth modification has a rod member 391b that penetrates the hole 253b, instead of the connecting member 291 according to the third embodiment. The rod member 391b is fixed to the housing 220. Unlike the ninth modification, the rod member 391b is not fixed to the load member 290b. The rod member 391b is flexible. The rod member 391b is made of, for example, carbon fiber reinforced plastic. However, the rod member 391b is not limited to this and may be made of bamboo or the like.

[0055] (Eleventh Modification) Fig. 23 is a diagram showing the configuration of a wave power generator 310c according to an eleventh modification of the third embodiment. As shown in Fig. 23, the wave power generator 310c includes a load member 290c. The load member 290c is fixed to a quay wall S. The load member 290c also includes a protrusion 290ca that protrudes from the quay wall S toward the sea at a position below the floating body 350. A pulley 232c is fixed to the upper surface of the protrusion 290ca.

[0056] (12th Modification) Fig. 24 is a diagram showing the configuration of a wave power generator 310d according to a twelfth modification of the third embodiment. As shown in Fig. 24, the wave power generator 310d includes a float 350d. The float 350d includes a through-hole 355d that penetrates from the bottom surface 255d of the recess 255 to the upper surface 351d of the float 350d, and a plug member 356d that is detachable from the through-hole 355d. With the plug member 356d removed from the through-hole 355d (shown by the dotted line), water is placed in the recess 255, and by placing the plug member 356d in the through-hole 355d in this state, it is possible to prevent air from entering the recess 255 (maintaining the state in which water is placed in the recess 255).

[0057] (13th Modification) 25 and 26 are diagrams illustrating the configuration of a wave power generator 310e according to a thirteenth modification of the third embodiment. The wave power generator 310e according to the thirteenth modification includes a float 350e and a pipe 351e that vertically penetrates the float 350e. While the recess 255 in the third embodiment has a shape that is recessed upward from the bottom, the recess 255e of the float 350e according to the thirteenth modification has a shape that is recessed inward from the side surface 350ea of ​​the float 350e. An opening 255ea is provided in the side surface 350ea of ​​the float 350e at a position higher than the lowest position (bottom) within the recess 255e. As a result, when the water surface W rises above the opening 255ea, water enters the recess 255e. Subsequently, as shown in FIG. 26, even when the water surface W falls below the opening 255ea, water remains in the recess 255e. As a result, the floating body 350e moves downward due to the weight of the water remaining in the recess 255e.

[0058] (14th Modification) 27 is a diagram showing the configuration of a floating body 350f according to a fourteenth modification of the third embodiment. The floating body 350f has a recess 255f recessed inward from the side surface. An upper surface 255fa of the recess 255f is inclined with respect to the horizontal plane so as to gradually descend from an opening 255fb toward the interior.

[0059] (15th Modification) 28 is a diagram showing the configuration of a floating body 350g according to a fifteenth modification of the third embodiment. The floating body 350g has a recess 255g recessed inward from the top surface. Water is placed in the recess 255g.

[0060] (16th Modification) 29 is a diagram showing the configuration of a float 350h according to a sixteenth modification of the third embodiment. The float 350h has a recess 255e. The float 350h has a through-hole 350ha that penetrates upward from the recess 255e. When water enters the recess 255e, air can be released through the through-hole 350ha.

[0061] [Fourth embodiment] Next, the configuration of a wave power generator 510 according to a fourth embodiment will be described with reference to Fig. 30. Fig. 30 is a diagram showing the configuration of a wave power generator 510 according to the fourth embodiment. As shown in Fig. 30, the wave power generator 510 of the fourth embodiment is provided with a submersible floating body 560 instead of a sinker.

[0062] As shown in Figure 30, the wave power generator 510 is disposed in water and includes a submersible floating body 560 having buoyancy. A rope 540 is connected to the lower end of the submersible floating body 560. The rope 540 extends downward from the submersible floating body 560, passes through pulleys 34 and 33, extends upward, passes through pulleys 31 and 32, extends downward, and is connected to a hook 551 of the floating body 550. The submersible floating body 560 is disposed between the float 550 and the pulley 34 in the vertical direction. A load member 552 is disposed inside the float 550. Furthermore, both the float 550 and the submersible floating body 560 are fixed to rail members 70. This allows the submersible floating body 560 to function as a sinker.

[0063] [Fifth embodiment] Next, the configuration of a wave power generator 610 according to a fifth embodiment will be described with reference to Figures 31 to 33. Figure 31 is a diagram showing the configuration of a wave power generator 610 according to the fifth embodiment. Fig. 32 is a cross-sectional view of a wave power generator 610 according to the fifth embodiment. Fig. 33 is a diagram showing the configuration of a housing body 620 according to the fifth embodiment.

[0064] As shown in Fig. 31 , a wave power generator 610 of the fifth embodiment includes a cylindrical container 620 having a closed bottom 620a, a pulley 631, a pulley 633, a pulley 634, a float 650, and a sinker 660. The pulleys 631, 633, 634, the float 650, and the sinker 660 are arranged inside the container 620. The pulley 631 is arranged at a position above the float 650. The sinker 660 is arranged between the float 650 and the pulley 631. The pulleys 633 and 634 are arranged at a position below the float 650. A rope 640 is connected to the underside of the float 650 and is connected to the upper surface of the sinker 660 via the pulleys 634, 633, and 631.

[0065] As shown in Fig. 32, the float 650 includes a plurality of rollers 651 that contact the inner surface of the container 620. This allows the float 650 to move up and down within the container 620. As shown in Fig. 33, the container 620 is provided with a plurality of holes 621. The plurality of holes 621 allow water to circulate between the outside and the inside of the container 620. This allows the float 650 to move up and down in response to changes in the position of the water surface W, causing the pulley 631 to rotate. The pulley 631 is connected to a power generation device (not shown).

[0066] [Sixth embodiment] Next, the configuration of a wave power generator 710 according to a sixth embodiment will be described with reference to Figures 34 and 35. Figures 34 and 35 are diagrams showing the configuration of the wave power generator 710 according to the sixth embodiment. The wave power generator 710 includes a pulley 731, a rope 740, a float 750, and a sinker 760. As shown in Figure 35, the float 750 is provided with a recess 751 through which the sinker 760 can pass in the vertical direction. The rope 740 is hung on the pulley 731, and one end is connected to the float 750 and the other end is connected to the sinker 760. This allows the float 750 and the sinker 760 to be close to each other (overlapped) in the vertical direction, thereby enabling the wave power generator 710 to be made smaller in size in the vertical direction.

[0067] [Modification of the sixth embodiment] (17th Modification) Figure 36 is a cross-sectional view of a wave power generator 710a according to a modification (seventeenth modification) of the sixth embodiment. As shown in Figure 36, the wave power generator 710a includes a float 750a and a sinker 760a. The float 750a is provided with a through-hole 751a through which the sinker 760a can pass in the vertical direction.

[0068] [Seventh embodiment] Next, the configuration of a wave power generation system 800 according to the seventh embodiment will be described with reference to Figs. 37 and 38. Fig. 37 is a diagram showing the configuration of a wave power generation device 810 according to the seventh embodiment. Fig. 38 is a diagram showing the configuration of the wave power generation system 800 according to the seventh embodiment. As shown in Fig. 37, the wave power generation system 800 has a plurality of wave power generation devices 810 arranged side by side along a quay wall S. Each wave power generation device 810 includes a pulley 831, a rope 840, a float 850, a sinker 860, and a container 820 fixed to the quay wall S. The floats 850 and the sinkers 860 are arranged alternately along the quay wall S. The container 820 includes a first member 821 arranged between the float 850 and the quay wall S, and a second member 822 surrounding the sinker 860. The first member 821 is connected to the second member 822 of another adjacent wave power generation device 810. 38, the housing body 820 is open on the offshore side relative to the float 850, allowing water to enter. The second member 822 prevents waves from hitting the sinker 860. The second member 822 has a side that approaches the float 850 as it approaches the quay S from offshore. This allows the housing body 820 to protect the sinker 860 from waves and also collect water from the waves toward the float 850, thereby increasing the amount of movement of the float 850. As a result, the amount of power generated by the power generation device can be increased while protecting the sinker 860 from waves.

[0069] [Modifications of the Seventh Embodiment (Modifications 18 to 26)] Next, modifications of the seventh embodiment (18th to 26th modifications) will be described.

[0070] (18th Modification) Fig. 39 is a diagram showing the configuration of a wave power generation system 800a according to an eighteenth modification of the seventh embodiment. As shown in Fig. 39, the wave power generation system 800a according to the eighteenth modification of the seventh embodiment includes a weight container 820a that does not contain a float 850 but contains a weight 860. The weight container 820a has a triangular shape in a plan view. The weight container 820a is fixed to a quay wall S. A side surface 821a of the weight container 820a is perpendicular to the quay wall S. A side surface 822a, which is different from the side surface 821a of the weight container 820a, intersects with the side surface 821a and the quay wall S.

[0071] (19th Modification) FIG. 40 is a diagram showing the configuration of a wave power generation system 800b according to a 19th modified example of the seventh embodiment. As shown in FIG. 40, the wave power generation system 800b according to the 19th modified example of the seventh embodiment includes a weight container 820b that does not contain a float 850 but contains a weight 860. The weight container 820b has a triangular shape in a plan view. A side surface 821b of the weight container 820b protrudes from the triangular portion so as to cover at least a part of the offshore side of the float 850. The side surface 821b forms an angle θ1 with the quay wall S. The angle θ1 has the relationship 0 degrees < θ1 < 90 degrees. This allows waves traveling from offshore (normal waves at the location where the wave power generation system 800b is located) to lift the float 850 within the range of angle θ1 from the quay wall S. Furthermore, the side surface 821b can prevent waves traveling from offshore (waves in emergencies such as typhoons) from traveling toward the floating body 850 outside the range of angle θ1 from the quay wall S. This can prevent the floating body 850 from being damaged by large waves.

[0072] (20th Modification) FIG. 41 is a diagram showing the configuration of a wave power generation system 800c according to a twentieth modification of the seventh embodiment. As shown in FIG. 41, the wave power generation system 800c according to the twentieth modification of the seventh embodiment includes a weight container 820c that does not contain a float 850 but contains a weight 860. The weight container 820c has a triangular shape in a plan view. A side surface 821c of the weight container 820c protrudes from the triangular portion so as to cover at least a part of the offshore side of the float 850. The side surface 821c forms an angle θ2 with the quay wall S. The angle θ2 has a relationship of θ2<θ1 (19th modification). The side surface 821c can prevent waves traveling from offshore (waves in emergencies such as during a typhoon) from traveling toward the float 850 outside the range of angle θ2 from the quay wall S.

[0073] (21st Modification) Fig. 42 is a diagram showing the configuration of a wave power generation system 800d according to a twenty-first modified example of the seventh embodiment. As shown in Fig. 42, the wave power generation system 800d according to the twenty-first modified example of the seventh embodiment includes a weight container 820d that does not contain a float 850 but contains a weight 860. The weight container 820d has a triangular shape in a plan view. The triangular part of the weight container 820d is arranged on the offshore side of the float 850. A side surface 821d of the weight container 820d is fixed to the quay wall S.

[0074] (22nd Modification) Fig. 43 is a diagram showing the configuration of a wave power generator 810e according to a 22nd modified example of the seventh embodiment. As shown in Fig. 43, the wave power generator 810e according to the 22nd modified example of the seventh embodiment includes a weight container 820e that does not contain a float 850 but contains a weight 860. The weight container 820e has a triangular shape in a plan view. The weight container 820e is fixed to a quay wall S. The weight container 820e has a portion 823e that protrudes below the float 850. The portion 823e has buoyancy. The buoyancy can reduce the load on the weight container 820e.

[0075] (23rd Modification) Fig. 44 is a diagram showing the configuration of a wave power generation system 800f according to a 23rd modified example of the seventh embodiment. As shown in Fig. 44, the wave power generation system 800f according to the 23rd modified example of the seventh embodiment includes a weight container 820f that does not contain a floating body 850 but contains a weight container 820f that contains a weight 860. The weight container 820f is fixed to a quay wall S and has a spiral shape. The weight container 820f includes a wall portion 822f that gradually moves away from the floating body 850 as it extends from the shore toward the offshore, and a wall portion 821f that covers the offshore side of the floating body 850.

[0076] (24th Modification) Fig. 45 is a diagram showing the configuration of a wave power generation system 800g according to a 24th modified example of the seventh embodiment. As shown in Fig. 45, the wave power generation system 800g according to the 24th modified example of the seventh embodiment includes a container 820g. The container 820g includes a wall 821g that gradually moves away from the floating body 850 as it extends from the shore toward the open sea, and a wall 1822g that covers the offshore side of the floating body 850.

[0077] (25th Modification) Fig. 46 is a diagram showing the configuration of a wave power generation system 800h according to a 25th modified example of the seventh embodiment. As shown in Fig. 46, the wave power generation system 800h according to the 25th modified example of the seventh embodiment includes a container 820h. The container 820h has walls 821h and 822h that gradually move away from the floating body 850 (approaching the sinker 860) as they move from the shore toward the open sea.

[0078] (26th Modification) Fig. 47 is a diagram showing the configuration of a wave power generation system 800i according to a 26th modified example of the seventh embodiment. As shown in Fig. 47, the wave power generation system 800i according to the 26th modified example of the seventh embodiment includes a container 820i. The container 820i covers the left-right surfaces (X1 direction and X2 direction) of the floating body 850, and includes wall portions 821i and 822i whose distance between them gradually increases from the shore toward the open sea.

[0079] [Eighth embodiment] Next, the configuration of a wave power generator 910 according to the eighth embodiment will be described with reference to Figs. 48 to 50. Figs. 48 to 50 are diagrams showing the configuration of the wave power generator 910 according to the eighth embodiment. As shown in Fig. 48, the wave power generator 910 includes a container 920 that houses a power generator and a pulley (not shown), a float 950 arranged below the container 920, and a wavebreak member 960. The wavebreak member 960 is fixed to the offshore side of the container 920. The wavebreak member 960 has a portion 961 fixed to the container 920 and a portion 962 extending downward below the container 920. The portions 961 and 962 are connected to each other at their upper ends. As shown in Fig. 50, the portion 962 is formed in a plate shape. As a result, even if the water surface Wb rises to the height where the container body 920 is located, the breakwater member 960 can protect the floating body 950 and the container body 920 from waves while flexing and deforming. This makes it possible to protect the power generation device and pulley housed in the container body 920 from the impact of waves. This makes it possible to prevent damage to the wave power generation device 910.

[0080] [Modifications of the Eighth Embodiment (Modifications 27 and 28)] Next, modifications (27th and 28th modifications) of the eighth embodiment will be described. Fig. 51 is a diagram showing the configuration of a breakwater member 960a according to the 27th modification of the eighth embodiment. Fig. 52 is a diagram showing the configuration of a breakwater member 960b according to the 28th modification of the eighth embodiment. As shown in Fig. 51, the breakwater member 960a includes two members 962a. Furthermore, as shown in Fig. 52, the breakwater member 960b includes three or more members 962b.

[0081] [Ninth embodiment] Next, the configuration of a wave power generator 1010 according to the ninth embodiment will be described with reference to Fig. 53. Fig. 53 is a diagram showing the configuration of the wave power generator 1010 according to the ninth embodiment. As shown in Fig. 53, the wave power generator 1010 includes a buoyant member 1011 fixed to the underside of the housing 99. The buoyant member 1011 is, for example, polystyrene foam or a box member with air sealed inside. This allows the wave power generator 1010 to reduce its load by using the buoyant member 1011.

[0082] [Tenth embodiment] Next, the configuration of a wave power generation system 1100 according to the tenth embodiment will be described with reference to Fig. 54. Fig. 54 is a diagram showing the configuration of a wave power generation system 1100 according to the tenth embodiment. As shown in Fig. 54, the wave power generation system 1110 has a plurality of wave power generation devices 10 arranged side by side along a quay wall S.

[0083] [Eleventh embodiment] Next, the configuration of a wave power generation system 1200 according to an eleventh embodiment will be described with reference to Fig. 55 and Fig. 56. Fig. 55 and Fig. 56 are diagrams for explaining the configuration of the wave power generation system 1200 according to the eleventh embodiment. As shown in Fig. 55, the wave power generation system 1200 includes a plurality of wave power generation devices 10 arranged in a matrix in a plan view. The wave power generation system 1200 includes a support body 1220 having a rectangular shape in a plan view, and a plurality of support floats 1250. The support floats 1250 are arranged at each of the four corners of the support body 1220. As will be described later, the support body 1220 may be configured to have a shape other than a rectangular shape in a plan view.

[0084] As shown in FIG. 56 , the support float 1250 has buoyancy and supports the support body 1220 at a height position above the water surface W. A housing 20 of the wave power generation device 10 and a rail member (not shown) are fixed to the support body 1220. The float 50 of the wave power generation device 10 floats on the water surface W. The wave power generation system 1200 includes a load member 1290 disposed on the seabed G and a connection member 1291 that connects the load member 1290 to the support float 1250. The connection member 1291 connects the load member 1290 to the support float 1250 so that the support float 1250 does not move horizontally (does not drift) due to waves. Note that, although the eleventh embodiment illustrates an example in which the wave power generation device 10 according to the first embodiment is disposed on the support body 1220, the present disclosure is not limited thereto. In other words, a wave power generation device according to any embodiment or any modification of the present disclosure may be disposed on the support body 1220.

[0085] [Modifications of the eleventh embodiment (Modifications 29 to 32)] Next, modifications of the eleventh embodiment (29th to 32nd modifications) will be described.

[0086] (29th Variation) 57 and 58 are diagrams illustrating the configuration of a wave power generation system 1300 according to a twenty-ninth modified example of the eleventh embodiment. As shown in FIG. 57, the wave power generation system 1300 includes a plurality of wave power generation devices 310 (wave power generation devices according to the third embodiment). The plurality of wave power generation devices 310 are fixed to a support 1220. The floats 350 of the wave power generation devices 310 are connected to the floats 350 of adjacent wave power generation devices 310 by connecting members 1351. The connecting members 1351 are made of a flexible and deformable member. For example, the connecting members 1351 are made of a rubber material. As a result, as shown in FIG. 58, even if the heights of the water surface W of the plurality of wave power generation devices 310 differ from one another, the connecting members 1351 deform, allowing the height positions of the plurality of floats 350 to follow the height of the water surface W. Furthermore, the multiple connection members 292 connected to the first load members 290 of the multiple wave power generators 310 are connected to one another by linking members 1390. This prevents the multiple connection members 292 from moving in water. Furthermore, even if the force of water is applied to one of the multiple connection members 292, the linking member 1390 can distribute the force to the other connection members 292, preventing the connection members 292 from being damaged.

[0087] (30th Variation) Fig. 59 is a diagram illustrating the configuration of a wave power generation system 1300a according to a 30th modified example of the 11th embodiment. As shown in Fig. 59, the wave power generation system 1300a includes a plurality of load members 290aa. The plurality of load members 290aa are arranged on the seabed G so as to overlap with a portion of the adjacent load members 290aa. This prevents the load members 290aa from moving on the seabed G.

[0088] (31st Variation) Fig. 60 is a diagram illustrating the configuration of a wave power generation system 1300b according to a thirty-first modified example of the eleventh embodiment. As shown in Fig. 60, the wave power generation system 1300b includes a plurality of load members 290ab. Each of the plurality of load members 290ab includes a convex portion 291ab and a concave portion 292ab. The plurality of load members 290ab are arranged such that the convex portion 291ab of an adjacent load member 290ab fits into the concave portion 292ab. This prevents the load members 290ab from moving (scattering) on ​​the seabed G.

[0089] (32nd Variation) Fig. 61 is a diagram illustrating the configuration of a wave power generation system 1300c according to a thirty-second modified example of the eleventh embodiment. As shown in Fig. 61, the wave power generation system 1300c includes a connecting member 1351c that connects multiple floats 350. The connecting member 1351c is a chain. As a result, even if the height position of the water surface W differs for each float 350, the connecting member 1351c deforms, so the height positions of the multiple floats 350 can follow the height of the water surface W.

[0090] [Variations] The above-described embodiments are merely examples for carrying out the present disclosure. Therefore, the present disclosure is not limited to the above-described embodiments, and the above-described embodiments can be appropriately modified and carried out without departing from the spirit of the present disclosure. Furthermore, each of the above-described embodiments (first to eleventh embodiments) and each of the modified examples (first to thirty-second modified examples) may be combined in any way, and the modified examples shown below may also be combined.

[0091] (1) In the first to eleventh embodiments, the upper surface of the wave power generation device's container is arranged parallel to a horizontal plane, but the present disclosure is not limited to this. The upper surface of the container may be inclined relative to a horizontal plane, as in the container 1420 according to a thirty-fourth modified example shown in Fig. 62 and Fig. 63 and the container 1420a according to a thirty-fifth modified example shown in Fig. 64.

[0092] (2) In the first to eleventh embodiments, no configuration for opening the container of the wave power generation device is shown, but the present disclosure is not limited to this. The container may be configured to be openable for maintenance, as in the container 1420 according to the thirty-third modified example shown in Figures 62 and 63 and the container 1420b according to the thirty-fifth modified example shown in Figures 65 and 66.

[0093] (33rd Variation) 62 and 63 are diagrams illustrating the configuration of a storage body 1420 according to a thirty-third modified example. As shown in Fig. 62, the storage body 1420 includes an upper surface 1421 and a hinge 1422. The upper surface 1421 has a curved surface that gradually slopes downward from the quay wall S toward the open sea. This allows waves to be diverted offshore by the upper surface 1421, even if they run up on the quay wall S.

[0094] The housing body 1420 is fixed to the quay wall S via pillars 1427 fixed to the quay wall S. As shown in FIG. 63 , the top surface 1421 rotates around hinges 1422, thereby opening the interior of the housing body 1420. In this state, maintenance of the power generation device and pulleys arranged in the housing body 1420 is performed. The housing body 1420 also includes string members 1423 that limit the range of movement of the top surface 1421. The string members 1423 connect the top surface 1421 and the pillars 1427.

[0095] (34th Variation) Fig. 64 is a diagram illustrating the configuration of a storage body 1420a according to a thirty-fourth modified example. As shown in Fig. 64, the storage body 1420a includes an upper surface 1421a. The upper surface 1421a has an inclined surface that gradually slopes downward from the quay wall S toward the open sea. As a result, even if waves run up on the quay wall S, the upper surface 1421a can divert them toward the open sea.

[0096] (35th Variation) 65 and 66 are diagrams illustrating the configuration of a housing 1420b according to a thirty-fifth modified example. As shown in FIG. 65, the housing 1420b includes a frame 1421b fixed to a pillar 1427 and a case 1422b. A power generator and a pulley (not shown) are fixed to the frame 1421b. As shown in FIG. 66, the case 1422b is configured to be detachable from the frame 1421b. This allows maintenance to be performed inside the housing 1420b with the case 1422b removed from the frame 1421b.

[0097] (3) In the first to eleventh embodiments, no example was shown in which a mechanism for winding up the rope was provided, but the present disclosure is not limited to this. As in a wave power generator 1510 according to a thirty-sixth modification shown in Fig. 67, a spiral spring 1531a fixed to a pulley 1531 and winding up a first rope 1541 may be provided.

[0098] (36th Variation) FIG. 67 is a diagram illustrating the configuration of a wave power generator 1510 according to a thirty-sixth modification. As shown in FIG. 67, the wave power generator 1510 includes pulleys 1531 to 1533, first ropes 1541 and 1542, a float 1550, a spiral spring 1531a fixed to the pulley 1531, and a weight 1560. The pulley 1531 is connected to a power generator (not shown). When the float 1550 rises, the spiral spring 1531a winds up the first rope 1541 connected to the upper surface of the float 1550. One end of the rope 1542 is connected to the lower surface of the float 1550, and is connected to the upper surface of the weight 1560 via the pulleys 1533 and 1532. As a result, when the water surface W descends, the weight of the weight 1560 causes the float 1550 to descend. By providing spiral spring 1531a, it is not necessary to provide a weight for rotating pulley 1531, and the number of weights can be reduced.

[0099] (4) In the first to eleventh embodiments, no example was shown in which another pulley was provided above the pulley connected to the power generation device, but the present disclosure is not limited to this. As in a wave power generation device 1610 according to a thirty-eighth modified example shown in Fig. 68, a pulley 1632 may be further disposed above the pulley 1631.

[0100] (37th Variation) FIG. 68 is a diagram illustrating the configuration of a wave power generator 1610 according to the thirty-seventh modified example. As shown in FIG. 68, the wave power generator 1610 includes pulleys 1631 to 1633, ropes 1641 and 1642, a floating body 1650, and a sinker 1660. The pulley 1631 is connected to a power generation device (not shown). The pulley 1632 is disposed at a higher position than the pulley 1631. The rope 1642 connects the floating body 1650 and the sinker 1660 via the pulleys 1631 and 1633. The rope 1641 connects the floating body 1650 and the sinker 1660 via the pulley 1632. This allows the floating body 1650 and the sinker 1660 to move only within the range of the length of the rope 1641. This makes it possible to prevent the float 1650 from colliding with the pulley 1633 when the water surface W drops.

[0101] (5) In the above first to eleventh embodiments, examples have been shown in which the rope is arranged so as to be directly hung on the pulley, but the present disclosure is not limited to this. (Thirty-eighth Modification) As in a wave power generation device 1710 according to a thirty-eighth modification shown in Fig. 69, an arm member 1731a may be arranged between the pulley 1731 and the rope 1740. The rope 1740, which is connected to a floating body 1750, may be connected to one end of the arm member 1731a connected to the pulley 1731, and a weight 1760 may be connected to the other end.

[0102] (6) In the first to eleventh embodiments, examples of the shape of the float were shown, but the present disclosure is not limited to the above. For example, floats according to the 39th to 42nd modified examples shown in Figs. 70 to 73 may be used in a wave power generation device. (39th Modification) A float 1850 according to the 39th modified example shown in Fig. 70 has an upper surface 1851 that tapers upward. A recess 1852 is formed on the underside of the float 1850. (40th Modification) A float 1850a according to the 40th modified example shown in Fig. 71 includes a box-shaped main body 1851a and a protruding portion 1852a that protrudes downward from the main body 1851a. The portion surrounded by the protruding portion 1852a functions as a recess in the float 1850a where water is placed. (Forty-first Modification) A float 1850b according to the forty-first modification shown in Fig. 72 includes a portion 1851a of the lower surface that is inclined relative to the horizontal plane, and a protruding portion 1852b that protrudes downward from the main body of the float 1850b. The portion surrounded by the protruding portion 1852b functions as a recess in the float 1850b in which water is placed. (Forty-second Modification) A float 1850c according to the forty-second modification shown in Fig. 73 includes a central portion 1851c (cylindrical portion), an inclined surface 1852c that gradually slopes downward from the central portion 1851c outward, and a recess 1853c that is recessed upward.

[0103] (7) In the above tenth embodiment, an example was shown in which the wave power generation devices were arranged in a row on the quay wall S, but the present disclosure is not limited to this. A plurality of wave power generation devices may be arranged in a matrix in plan view, lined up from the quay wall S toward the open sea.

[0104] (8) In the eleventh embodiment, an example was shown in which the support body was formed into a rectangular shape in a plan view, but the present disclosure is not limited to this. For example, the support body may be configured to have a circular shape in a plan view, a triangular shape, a polygonal shape (with five or more corners), or a circular or elliptical shape. That is, the multiple wave power generation devices arranged on the support body may also be arranged so as to have a triangular shape in a plan view, a polygonal shape (with five or more corners), a circular shape, or an elliptical shape, in accordance with the shape of the support body.

[0105] (9) In the first to eleventh embodiments, the power converter and the storage battery are provided outside the wave power generation system, but the present disclosure is not limited to this. For example, at least one of the power converter and the storage battery may be provided inside the wave power generation system.

[0106] (10) In the first to eleventh embodiments, the power generation device is disposed inside the housing, but the present disclosure is not limited to this. That is, the power generation device may be disposed outside the housing (for example, on a quay).

[0107] (11) In the first embodiment, the wave power generation device is mounted on a rail member fixed to the shore, but the present disclosure is not limited to this. For example, the wave power generation device may be mounted on an arm fixed to the shore, or on a rail fixed to the seabed that extends in the vertical direction.

[0108] (12) In the above eleventh embodiment (twenty-ninth modified example), an example was shown in which multiple wave power generators were connected by elastic connecting members, but the present disclosure is not limited to this. The connecting members may be composed of non-elastic bolts and nuts. Furthermore, multiple wave power generators may be connected by welding without using connecting members. Furthermore, multiple wave power generators do not have to be connected to each other.

[0109] (13) In the second embodiment described above, an example was shown in which the entire underside of the first load member 290 contacts the seabed G as shown in Fig. 19, but the present disclosure is not limited to this. (43rd Modification) For example, as in a wave power generation device 1910 according to the 43rd modification shown in Fig. 74, one side 1290aa of the underside of the first load member 1290a contacts the seabed G, but the other side 1290ab is suspended above water. As a result, the load of the first load member 1290a is applied to the pulley 232, and slack in the rope 240 can be prevented via the pulley 232.

[0110] The present disclosure can also be explained as follows.

[0111] A wave power generation device according to a first configuration comprises: a float, at least a portion of which can float on the water surface and which moves up and down in response to changes in the position of the water surface caused by waves; a first pulley; a motion transmission member which includes a first end connected to the float and rotates the first pulley by the up and down movement of the float, wherein at least the portion hooked on the first pulley is formed in the shape of a string, belt, or chain; and a power generation unit which converts the rotational motion of the first pulley into electricity (first configuration).

[0112] According to the first configuration, the motion of the float can be transmitted to the power generation unit by the motion transmission member. Because the operation transmission member is configured in the form of a string, band, or chain, no housing is required to house the operation transmission member. This prevents the wave power generation device from becoming too large, even when the distance between the water surface on which the float is placed and the power generation unit is large. Furthermore, the distance between the water surface and the power generation unit varies depending on the installation location of the wave power generation device. However, by changing the length of the operation transmission member configured in the form of a string, band, or chain depending on the distance between the water surface and the power generation unit, the wave power generation device can be installed in various installation locations.

[0113] In the first configuration, the wave power generator may further include a weight, and the motion transmission member may include a second end connected to the weight (second configuration).

[0114] According to the second configuration, the floating body can be pulled by the weight, which can prevent the occurrence of slack in the drive transmission member.

[0115] In the second configuration, the wave power generator may further include a second pulley arranged at a lower position relative to the floating body. The first pulley may be arranged at an upper position relative to the floating body. A part of the motion transmission member may be arranged across the first pulley and the second pulley. The first end may be an upper end of a portion of the motion transmission member that extends upward from the second pulley. The second end may be a lower end of a portion of the motion transmission member that extends downward from the first pulley. The weight may be arranged between the floating body and the first pulley in the vertical direction (third configuration).

[0116] Here, the speed at which the water surface rises due to waves is slower than the speed at which the water surface falls after the waves have passed. Therefore, when the float is suspended from above by the drive transmission member, if the water surface rises more rapidly than the speed at which the first pulley rotates, slack will occur in the drive transmission member. If the float descends during this period of slack, it becomes difficult for the float's up and down movement to be converted into rotational movement of the first pulley. In contrast, with the third configuration, when the float rises, the drive transmission member is pulled upward, so even if the water surface rises sharply, the drive transmission member does not slacken and the second pulley and the first pulley rotate. As a result, the amount of power generated by the power generation unit can be increased.

[0117] In the third configuration, the wave power generator may further include a first elastic member connecting the sinker and the floating body (fourth configuration).

[0118] According to the fourth configuration, even if the position of the float changes suddenly, the first elastic member can change the position of the sinker to follow the movement of the float, thereby preventing slack from occurring in the drive transmission member connecting the float and the sinker via the first pulley and the second pulley.

[0119] In the third or fourth configuration, the wave power generator may further include a rail member on which the float is arranged to be able to move up and down, and a second pulley housing that houses the second pulley. The second pulley housing may include an upper surface having a first inclined surface that slopes downward as it moves away from the rail member (fifth configuration).

[0120] According to the fifth configuration, when waves travel along the first inclined surface, the water surface tends to rise, which increases the amount of movement of the float, thereby increasing the amount of power generated by the power generation unit.

[0121] In any one of the second to fifth configurations, the wave power generator may further include a rail member on which the float is arranged so as to be able to move up and down. The sinker may be arranged on the rail member so as to be able to move up and down (sixth configuration).

[0122] According to the sixth configuration, the float and the sinker can be restricted from moving in directions other than the up-down direction (horizontal direction) by the rail members. Furthermore, since the float and the sinker can be arranged on the same rail member, the number of rail members can be reduced compared to when the float and the sinker are arranged on separate rails.

[0123] In the sixth configuration, the wave power generator may further include a box member having an open bottom and containing a portion of the rail member, including the upper end thereof, and the power generating unit and the first pulley may be disposed above the box member (seventh configuration).

[0124] According to the seventh configuration, the box member is filled with air, so that the water level inside the box member is unlikely to rise even when waves advance. Therefore, even if the float and sinker move toward the upper end of the rail member, the rise of the float and sinker can be stopped inside the box member, preventing the float and sinker from colliding with the first pulley.

[0125] In the sixth or seventh configuration, the rail members may be fixed to a quay. The floating body may be configured so that its width decreases from the quay toward the open sea in a plan view (eighth configuration).

[0126] Here, if the rail members are fixed to a quay wall, when waves travel along the quay wall, a force is applied to the float that pulls the float away from the rail members. In contrast, with the eighth configuration, even when waves travel along the quay wall, the water in the waves flows toward the sea along the shape of the float, preventing the float from being pulled away from the rail members.

[0127] In any one of the sixth to eighth configurations, the floating body may include a lower surface having a second inclined surface that slopes upward as it moves away from the rail member (ninth configuration).

[0128] According to the ninth configuration, the floating body is pushed up by waves traveling along the second inclined surface toward the rail member, thereby increasing the amount of movement of the floating body, and as a result, the amount of power generated by the power generation unit can be increased.

[0129] In any one of the second to ninth configurations, the wave power generator may further include a weight container for accommodating the weight at a position adjacent to the floating body, the weight container being fixed to a quay wall. The weight container may be configured to have a side surface that approaches the floating body as it approaches the quay wall from offshore (tenth configuration).

[0130] According to the tenth configuration, the weight holder can protect the weight from waves, and the side of the weight holder can collect water from the waves toward the float, increasing the amount of movement of the float. As a result, the amount of power generated by the power generation unit can be increased while protecting the weight from waves.

[0131] In any one of the first to tenth configurations, the wave power generation device may further include a first pulley housing that houses the power generation unit and the first pulley at a position above the floating body, the first pulley housing being fixed to a quay wall, and a breakwater member arranged offshore of the first pulley housing (eleventh configuration).

[0132] According to the eleventh configuration, the power generating section and the first pulley can be protected from the impact of waves, thereby preventing damage to the wave power generator.

[0133] In any one of the first to eleventh configurations, the motion transmission member may include a tensioner that presses a part of the part other than the part that is hung on the first pulley, or may include a second elastic member that forms a part of the part other than the part that is hung on the first pulley (twelfth configuration).

[0134] According to the twelfth configuration, the tensioner can prevent the driving force transmission member from loosening.

[0135] In any one of the first to twelfth configurations, the wave power generator may further include a submersible float disposed underwater and having buoyancy, and a third pulley disposed below the submersible float. A portion of the motion transmission member may be disposed across the first pulley and the third pulley. The motion transmission member may include a third end portion that is the upper end portion of a portion extending upward from the third pulley and that is connected to the submersible float. The first end portion may be the lower end portion of a portion of the motion transmission member that extends downward from the first pulley. The submersible float may be disposed between the float and the third pulley in the vertical direction (thirteenth configuration).

[0136] According to the thirteenth configuration, the underwater floating body can be made to function as a sinker.

[0137] In any one of the first to thirteenth configurations, the wave power generation device may further include a float housing that houses the float so that the float can move up and down, and that allows water to pass between the inside of the float housing section and the outside of the float housing section (fourteenth configuration).

[0138] According to the fourteenth configuration, the floating body can be made to move up and down in response to the movement of the water surface while restricting the horizontal movement of the floating body.

[0139] In any one of the first to fourteenth configurations, the wave power generator may further include a shaft member that forms the rotation axis of the first pulley. A part of the portion of the motion transmission member that is hung on the first pulley may be disposed so as to pass through the shaft member (fifteenth configuration).

[0140] According to the fifteenth configuration, by passing the shaft member through, it is possible to prevent the power transmission member from slipping relative to the first pulley.

[0141] In any one of the first to fifteenth configurations, the float may include a hole in which a part of the motion transmission member is disposed, or a recess in which a part of the motion transmission member is disposed (sixteenth configuration).

[0142] According to the sixteenth configuration, the operation transmission member comes into contact with the hole or recess of the float, thereby preventing the float from moving horizontally. Furthermore, by arranging the operation transmission member in the hole or recess, the area in which the operation transmission member and the float are arranged can be reduced. As a result, the wave power generator can be made smaller.

[0143] In any one of the first to sixteenth configurations, the wave power generator may further include a fourth pulley arranged at a lower position relative to the floating body. A part of the motion transmission member may be arranged across the first pulley and the fourth pulley. The first end may be a lower end of a portion of the motion transmission member that extends downward from the first pulley. The first end may be connected to an upper end of the floating body. The motion transmission member may include a fourth end that is an upper end of a portion that extends upward from the fourth pulley, the fourth end being connected to the lower end of the floating body (seventeenth configuration).

[0144] According to the seventeenth configuration, there is no need to provide a weight.

[0145] In the seventeenth configuration, the wave power generator may further include a load member fixed to the fourth pulley and pulling the fourth pulley toward the bottom of the water (eighteenth configuration).

[0146] According to the eighteenth configuration, the driving force transmission member hung on the fourth pulley can be prevented from loosening.

[0147] In any one of the first to eighteenth configurations, the wave power generation device may further include a first pulley housing that houses the power generation unit and the first pulley at a position above the float, the first pulley housing being fixed to a quay wall, and a connecting member that connects the load member and the first pulley housing. The float may have a first through-hole in which a part of the connecting member is disposed (a nineteenth configuration).

[0148] According to the nineteenth configuration, since a connecting member that connects the load member (fourth pulley) and the first pulley housing is disposed in the first through-hole of the float, the connecting member can function as a guide for the movement (vertical movement) of the float between the first pulley and the fourth pulley, thereby preventing the float from moving (wobbling) in the horizontal direction.

[0149] In any one of the first to nineteenth configurations, the wave power generation device may further include a first pulley housing that houses the power generation unit and the first pulley at a position above the floating body and is fixed to a quay. An upper surface of the first pulley housing may be configured to have a fourth inclined surface that slopes downward from the quay toward the sea (twentieth configuration).

[0150] According to the twentieth configuration, even if waves run up on the quay wall, the fourth inclined surface can direct the water toward the open sea.

[0151] In the twentieth configuration, the upper surface of the floating body may be configured to have a fifth inclined surface that slopes downward from the quay toward the open sea (twenty-first configuration).

[0152] According to the twenty-first configuration, even if waves run up onto the floating body, the fifth inclined surface can cause the water to flow offshore.

[0153] In any one of the first to twenty-first configurations, the float may be configured to have a recess that is recessed toward the inside of the float and into which water enters (twenty-second configuration).

[0154] According to the 22nd configuration, the weight of the water is applied to the float, so the speed at which the float descends can be increased. Also, unlike when a metal member (weight) is provided inside the float, the water around the float can be used, so the material required for the wave power generator can be reduced.

[0155] In the twenty-second configuration, the recess may be recessed upward from the lower surface of the float. The float may include a second through-hole that penetrates from the bottom surface of the recess to the upper surface of the float, and a plug member that is detachable from the second through-hole (twenty-third configuration).

[0156] According to the above 23rd configuration, by placing water in the recess with the plug member removed from the second through hole and then placing the plug member in the second through hole in that state, it is possible to prevent air from entering the recess (maintaining the state in which water is placed in the recess).

[0157] In any one of the first to twenty-third configurations, the bottom surface of the floating body may be configured to have a sixth inclined surface that is inclined relative to the horizontal plane (twenty-fourth configuration).

[0158] According to the 24th configuration, the resistance of the float to water when it sinks can be reduced, which increases the amount of movement of the float, thereby increasing the amount of power generated by the power generation unit.

[0159] In any one of the second to twenty-fourth configurations, in a configuration including a weight, the upper surface or the lower surface of the weight may be configured to have a seventh inclined surface inclined with respect to the horizontal plane (twenty-fifth configuration).

[0160] According to the twenty-fifth configuration, the air resistance when the weight moves up and down can be reduced. As a result, the resistance to the rotation of the first pulley is reduced, and the amount of power generated by the power generation unit can be increased.

[0161] In any one of the first to twenty-fifth configurations, the first pulley includes a spiral spring member that winds up the motion transmission member (twenty-sixth configuration).

[0162] According to the twenty-sixth configuration, the first pulley can be rotated by moving the drive transmission member in conjunction with the movement of the float without providing a weight.

[0163] A wave power generation system according to a 27th configuration is a wave power generation system including a plurality of wave power generation devices. Each of the plurality of wave power generation devices includes: a float, at least a portion of which is floatable on the water surface and moves up and down in response to changes in the water surface position caused by waves; a first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley with the up and down movement of the float, the motion transmission member having at least a portion hooked on the first pulley in a string-like, belt-like, or chain-like shape; a power generation unit that converts the rotational motion of the first pulley into electric power; and a first pulley housing that houses the first pulley and the power generation unit. The plurality of first pulley housings arranged in the plurality of wave power generation devices are connected to each other by a connecting member (27th configuration).

[0164] According to the twenty-seventh configuration, it is possible to provide a wave power generation system that can prevent the wave power generation device from becoming large even when the distance between the water surface and the power generation section is large.

[0165] In the 27th configuration, each of the plurality of wave power generators may include a sinker and a sinker housing that surrounds the sinker in a plan view and is fixed to a quay wall. The motion transmission member may include a second end connected to the sinker. The float and the sinker may be arranged alternately along the quay wall. The sinker housing may include a first member arranged between the float and the quay wall and a second member that surrounds the sinker. The plurality of wave power generators may include a first wave power generator and a second wave power generator adjacent to the first wave power generator. The first member of the first wave power generator may be connected to the second member of the second wave power generator (28th configuration).

[0166] According to the 28th configuration, by arranging multiple weight receptacles in a row along the quay, the weights of multiple wave power generation devices including the first wave power generation device and the second wave power generation device can be protected from waves by the second member, and wave water can be collected on the float by the first member. [Explanation of symbols]

[0167] 10: wave power generator, 10a: wave power generator, 10b: wave power generator, 10c: wave power generator, 10d: wave power generator, 10e: wave power generator, 10f: wave power generator, 10g: wave power generator, 10h: wave power generator, 12: container, 20: container, 20a: bottom plate, 20b: hole, 20c: hole, 21: generator, 22: flywheel, 23: gearbox, 23a: ratchet gear, 23b: gear, 23c: shaft, 23d: gear, 23e: gear, 23f: ratchet gear, 24: shaft, 24e: shaft, 24f: shaft, 24fa: through hole, 2 5: shaft, 26: shaft, 27: beam member, 28: box member, 29: container, 29a: upper surface, 31: pulley, 31e: pulley, 31g: pulley, 31h: pulley, 32: pulley, 32e: pulley, 32g: pulley, 32h: pulley, 33: pulley, 33g: pulley, 33h: pulley, 34: pulley, 34g: pulley, 34h: pulley, 40: rope, 40a: rope, 40b: rope, 40c: rope, 40ea: rope, 40eb: rope, 40f: rope, 40g: operation transmission member, 40h: operation transmission member, 41: first part, 41g: first part, 42: second part, 43: third part, 4 4: fourth part, 44g: fourth part, 45: fifth part, 46: end part, 47: end part, 50: float, 51: hook, 52: upper surface, 53: lower surface, 60: weight, 61: hook, 62: upper surface, 63: lower surface, 70: rail member, 71: member, 72: upper end, 80: elastic member, 80a: elastic member, 80b: elastic member, 80c: tensioner, 99: housing, 100: wave power generation system, 101: power conversion device, 102: equipment, 103: storage battery, 210: wave power generation device, 220: housing, 220a: bottom surface, 220b: cushioning material, 222: flywheel, 231: pulley, 232 : pulley, 232c: pulley, 240: rope, 246: end, 247: end, 250: float, 251: hook, 252: hook, 253: member, 253a: hole, 253b: hole, 253c: lower end, 253d: lower end, 254: lower end, 255: recess, 255d: bottom surface, 255e: recess, 255ea: opening, 255f: recess, 255fa: upper surface, 255fb: opening, 255g: recess, 290: first load member, 290aa: load member, 290ab: load member, 290b: load member, 290c: load member, 290ca: protrusion, 291: connecting member, 291ab: convex portion,292: connecting member, 292ab: recess, 293: second load member, 310: wave power generation device, 310a: wave power generation device, 310b: wave power generation device, 310c: wave power generation device, 310d: wave power generation device, 310e: wave power generation device, 340: rope, 350: float, 350d: float, 350e: float, 350ea: side, 350f: float, 350g: float, 350h: float, 350ha: through hole, 351d: upper surface, 351e: pipe, 355d: through hole, 356d: plug member, 360: weight, 391a: rod member, 391b: rod member, 510: wave power generation device, 540: rope , 550: float, 551: hook, 552: load member, 560: underwater float, 610: wave power generation device, 620: container, 620a: bottom, 621: hole, 631: pulley, 633: pulley, 634: pulley, 640: rope, 650: float, 651: roller, 660: sinker, 710: wave power generation device, 710a: wave power generation device, 731: pulley, 740: rope, 750: float, 750a: float, 751: recess, 751a: through hole, 760: sinker, 760a: sinker, 800: wave power generation system, 800a: wave power generation system, 800b: wave power generation system, 800c: wave power generation system power generation system, 800d: wave power generation system, 800f: wave power generation system, 800g: wave power generation system, 800h: wave power generation system, 800i: wave power generation system, 810: wave power generation device, 810e: wave power generation device, 820: container, 820a: weight container, 820b: weight container, 820c: weight container, 820d: weight container, 820e: weight container, 820f: weight container, 820g: container, 820h: container, 820i: container, 821: first member, 821a: side surface, 821b: side surface, 821c: side surface, 821d: side surface, 821f: wall portion, 821g: wall portion , 821h: wall portion, 821i: wall portion, 822: second member, 822a: side surface, 822f: wall portion, 822h: wall portion, 822i: wall portion, 823e: part, 831: pulley, 840: rope, 850: float, 860: weight, 910: wave power generation device, 920: container, 950: float, 960: breakwater member, 960a: breakwater member, 960b: breakwater member, 961: part, 962: part, 962a: member, 962b: member, 1010: wave power generation device, 1011: member, 1100: wave power generation system, 1110: wave power generation system, 1200: wave power generation system, 1220: support body,1250: supporting float, 1290: load member, 1290a: first load member, 1290aa: one side, 1290ab: other side, 1291: connecting member, 1300: wave power generation system, 1300a: wave power generation system, 1300b: wave power generation system, 1300c: wave power generation system, 1351: connecting member, 1351c: connecting member, 1390: connecting member, 14 20: container, 1420a: container, 1420b: container, 1421: upper surface, 1421a: upper surface, 1421b: frame, 1422: hinge, 1422b: case, 1423: string member, 1427: pillar material, 1510: wave power generation device, 1531: pulley, 1531a: spiral spring, 1532: pulley, 1533: pulley, 1541: first rope, 1542: rope rope, 1550: float, 1560: sinker, 1610: wave power generator, 1631: pulley, 1632: pulley, 1633: pulley, 1641: rope, 1642: rope, 1650: float, 1660: sinker, 1710: wave power generator, 1731: pulley, 1731a: arm member, 1740: rope, 1750: float, 1760: sinker, 1822g: wall portion, 1850: Floating body, 1850a: floating body, 1850b: floating body, 1850c: floating body, 1851: upper surface, 1851a: main body, 1851c: central part, 1852: recess, 1852a: protruding part, 1852b: protruding part, 1852c: inclined surface, 1853c: recess, 1910: wave power generation device, G: seabed, S: quay, W: water surface, Wa: water surface, Wb: water surface, θ1: angle, θ2: angle,

Claims

1. a floating body at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a weight; and The motion transmission member includes a second end connected to the weight.

2. Further, a second pulley is disposed at a lower position relative to the floating body, The first pulley is disposed at an upper position relative to the floating body, a portion of the motion transmission member is disposed across the first pulley and the second pulley; the first end is an upper end of a portion of the motion transmission member that extends upward from the second pulley, the second end is a lower end of a portion of the motion transmission member that extends downward from the first pulley, The wave power generator according to claim 1 , wherein the sinker is disposed between the floating body and the first pulley in the vertical direction.

3. The wave power generator according to claim 2 , further comprising a first elastic member connecting the sinker and the floating body.

4. a rail member on which the float is arranged so as to be able to move up and down; A second pulley housing that houses the second pulley, The wave power generation device according to claim 2 , wherein the second pulley housing includes an upper surface having a first inclined surface that slopes downward as it moves away from the rail member.

5. The float further includes a rail member arranged to allow vertical movement, The wave power generator according to claim 1 , wherein the sinker is arranged on the rail member so as to be capable of moving up and down.

6. a box member having an open bottom and a portion of the rail member including the upper end housed therein; The wave power generator according to claim 5 , wherein the power generating unit and the first pulley are disposed above the box member.

7. The rail member is fixed to the quay wall, The wave power generator according to claim 5 , wherein the floating body has a shape in which the width decreases from the quay wall toward the open sea in a plan view.

8. The wave power generator according to claim 5 , wherein the floating body includes a lower surface having a second inclined surface that slopes upward as it moves away from the rail member.

9. The floating structure further includes a sinker housing for housing the sinker, the sinker housing being fixed to a quay wall at a position adjacent to the floating structure, The wave power generator according to claim 1 , wherein the sinker housing has a side surface that approaches the floating body as it approaches the quay from offshore.

10. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a first pulley housing that houses the power generation unit and the first pulley at a position above the floating body, the first pulley housing being fixed to a quay; a breakwater member arranged on the offshore side of the first pulley housing, The wave power generation device, wherein the breakwater member is configured to be flexible and deformable.

11. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power, A wave power generation device in which the motion transmission member includes a tensioner that presses a part of the part other than the part that is hooked on the first pulley, or includes a second elastic member that forms a part of the part other than the part that is hooked on the first pulley.

12. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a submersible floating body disposed in water and having buoyancy; a third pulley arranged at a lower position relative to the underwater floating body, a portion of the motion transmission member is disposed across the first pulley and the third pulley; the motion transmission member includes a third end portion that is an upper end portion of a portion extending upward from the third pulley, the third end portion being connected to the underwater floating body; the first end is a lower end of a portion of the motion transmission member that extends downward from the first pulley, The underwater floating body is arranged between the floating body and the third pulley in the vertical direction.

13. 2. The wave power generation device according to claim 1, further comprising a float housing that houses the float inside so that the float can move up and down, and that allows water to pass between the inside and the outside.

14. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a shaft member that constitutes a rotation shaft of the first pulley, A wave power generation device, wherein a part of the portion of the motion transmission member that is hung on the first pulley is arranged to pass through the shaft member.

15. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power, The wave power generation device, wherein the floating body includes a hole in which a part of the motion transmission member is disposed, or a recess in which a part of the motion transmission member is disposed.

16. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a fourth pulley arranged at a lower position relative to the floating body, a portion of the motion transmission member is disposed across the first pulley and the fourth pulley; the first end is a lower end of a portion of the motion transmission member that extends downward from the first pulley, the first end is connected to the upper end of the floating body; A wave power generation device wherein the motion transmission member includes a fourth end which is the upper end of the portion extending upward from the fourth pulley and which is connected to the lower end of the float.

17. 17. The wave power generation device according to claim 16, further comprising a load member fixed to the fourth pulley and pulling the fourth pulley towards the bottom of the water.

18. a first pulley housing that houses the power generation unit and the first pulley at a position above the floating body, the first pulley housing being fixed to a quay; A connecting member that connects the load member and the first pulley housing, The wave power generator according to claim 17, wherein the floating body has a first through-hole in which a part of the connecting member is disposed.

19. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a first pulley housing that houses the power generation unit and the first pulley at a position above the floating body, the first pulley housing being fixed to a quay; A wave power generation device, wherein the upper surface of the first pulley housing has a fourth inclined surface that slopes downward from the quay wall toward the offshore.

20. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power, The wave power generation device, wherein the upper surface of the float has a fifth inclined surface that slopes downward from the quay toward the open sea.

21. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power, The float has a recess that is recessed toward the inside of the float and into which water enters, The recess has a shape recessed inward from the side surface of the float, A wave power generation device, wherein the side of the floating body has an opening at a position higher than the bottom of the recess, through which water enters the recess.

22. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power, The float has a recess that is recessed toward the inside of the float and into which water enters, The recessed portion is recessed upward from the lower surface of the floating body, The floating body is a second through hole penetrating from the bottom surface of the recess to the upper surface of the floating body; a plug member that is detachable from the second through hole.

23. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a rail member that holds the floating body in a state where it can move up and down, the lower surface of the floating body has a sixth inclined surface inclined with respect to a horizontal plane, The wave power generation device, wherein the sixth inclined surface has a shape that slopes upward as it moves away from the rail member.

24. The wave power generation device according to claim 1 , wherein the upper surface of the weight or the lower surface of the weight has a seventh inclined surface that is inclined with respect to a horizontal plane.

25. A float at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power, The wave power generation device, wherein the first pulley includes a spiral spring member that winds up the motion transmission member.

26. A wave power generation system including a plurality of wave power generation devices, Each of the plurality of wave power generation devices is a floating body at least a portion of which is capable of floating on the water surface and which moves up and down in response to changes in the water surface position caused by waves; A first pulley; a motion transmission member including a first end connected to the float and rotating the first pulley by the up and down movement of the float, wherein at least a portion of the motion transmission member hooked on the first pulley is formed in a string, band, or chain shape; a power generating unit that converts the rotational motion of the first pulley into electric power; a first pulley housing that houses the first pulley and the power generation unit; a weight; and the motion transmission member includes a second end connected to the weight; A wave power generation system, wherein the first pulley housings arranged at the plurality of wave power generation devices are connected to each other by connecting members.

27. Each of the plurality of wave power generation devices includes a weight housing that surrounds the weight in a plan view and is fixed to a quay wall, The floating bodies and the sinkers are alternately arranged along the quay wall, The weight container is a first member disposed between the floating body and a quay wall; a second member surrounding the weight, the plurality of wave power generation devices include a first wave power generation device and a second wave power generation device adjacent to the first wave power generation device; 27. The wave power generation system according to claim 26, wherein the first member of the first wave power generation device is connected to the second member of the second wave power generation device.

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