Wave power generation device and motion transmission device

Abstract

To provide a wave power generating device and a motion transmitting device which can prevent deterioration even in a place where there is a high possibility of contact with water. [Solution] A wave power generator (10) includes a float, a sinker, a pulley (31) including a portion with diameter R1 and a portion with diameter R2 different from diameter R1, a rope (40a) wound around the portion with diameter R1 and pulled by the float, a rope (40b) wound around the portion with diameter R2 and pulled by the sinker, and a power generator (21) that converts the rotational motion of the pulley (31) into electric power. The pulley (31) includes a through-hole (31c) through which the rope (40a) and the rope (40b) are connected.

Description

[Technical Field]

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

[0002] Patent Document 1 describes a wave power generator having a float that floats on the sea. The float is fixed to an arm that is fixed to a quay. When the sea level rises, the buoyancy of the float causes the arm to move the float upward, and when the sea level falls, the gravity of the float causes the float to move downward. A conversion mechanism is fixed to the float, which converts only the movement when it descends into mechanical power. The conversion mechanism rotates a shaft connected to a generator via a chain (converting up and down movement into rotational movement). The generator converts the rotational movement into electricity. The wave power generator is also equipped with a tensioning device that applies a certain tension to the chain to prevent slack in the chain when the float rises. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-47147 Summary of the Invention [Problem to be solved by the invention]

[0004] The power generating device or motion transmission device described in Patent Document 1 uses a chain, which has the problem that the chain is prone to deterioration (rust) in places where there is a high possibility of water coming into contact with the chain.

[0005] An object of the present disclosure is to provide a wave power generation device and a motion transmission device that can prevent deterioration even in places where there is a high possibility of contact with water. [Means for solving the problem]

[0006] To achieve the above object, a wave power generator according to a first aspect of the present disclosure includes 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 including a weight, a first part, and a second part, the first part and the second part rotating integrally, a first rope partially wound around the first part and pulled by the float, a second rope partially wound around the second part and pulled by the weight, and a power generation unit that converts the rotational motion of the first pulley into electric power. The first pulley includes a through hole through which the first rope and the second rope are connected inside.

[0007] A wave power generator according to a second aspect includes 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 including a weight, a first portion, and a second portion, wherein the first portion and the second portion rotate integrally, a first rope partially wound around the first portion and pulled by the float, a second rope partially wound around the second portion and pulled by the weight, and a power generating unit that converts the rotational motion of the first pulley into electric power. The first pulley includes a first through hole in which the first rope is arranged and fixed, and a second through hole in which the second rope is arranged and fixed.

[0008] A motion transmission device according to a third aspect includes a moving member that moves up and down due to an external force, a first pulley including a weight, a first part, and a second part, the first part and the second part rotating integrally, a first rope partially wound around the first part and pulled by the moving member, and a second rope partially wound around the second part and pulled by the weight. The first pulley includes a through hole through which the first rope and the second rope are connected internally.

[0009] A motion transmission device according to a fourth aspect includes a moving member that moves up and down due to an external force, a first pulley including a weight, a first part, and a second part, wherein the first part and the second part rotate integrally, a first rope partially wound around the first part and pulled by the moving member, and a second rope partially wound around the second part and pulled by the weight. The first pulley includes a first through hole in which the first rope is disposed and fixed, and a second through hole in which the second rope is disposed and fixed. [Effects of the Invention]

[0010] According to the above configuration, deterioration can be prevented even in places where there is a high possibility of contact with water. [Brief explanation of the drawings]

[0011] [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 the pulley 31 according to the first embodiment. [Figure 12] FIG. 12 is a diagram showing the configuration of a pulley 2031 according to a first modified example of the first embodiment. [Figure 13A] FIG. 13A is a diagram showing the configuration of a pulley 2131 according to a second modified example of the first embodiment. [Figure 13B] FIG. 13B is a diagram showing the configuration of a pulley 2131 according to a second modified example of the first embodiment. [Figure 13C] FIG. 13C is a diagram showing the configuration of a pulley 2131 according to a second modified example of the first embodiment. [Figure 14] FIG. 14 is a diagram showing the configuration of a pulley 2231 according to a third modified example of the first embodiment. [Figure 15] FIG. 15 is a diagram showing the configuration of a pulley 2331 according to a fourth modified example of the first embodiment. [Figure 16] FIG. 16 is a diagram showing the configuration of a pulley 2431 according to a fifth modified example of the first embodiment. [Figure 17] FIG. 17 is a diagram showing the configuration of a pulley 2531 according to a sixth modified example of the first embodiment. [Figure 18] FIG. 18 is a diagram showing the configuration of a wave power generator 10d according to a seventh 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 an eighth 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 ninth modification of the third embodiment. [Figure 23] FIG. 23 is a diagram showing the configuration of a wave power generation device 310c according to a tenth modification of the third embodiment. [Figure 24]FIG. 24 is a diagram showing the configuration of a wave power generator 310d according to an eleventh modification of the third embodiment. [Figure 25] FIG. 25 is a diagram showing the configuration of a wave power generator 310e according to a twelfth modification of the third embodiment. [Figure 26] FIG. 26 is a diagram showing the configuration of a wave power generator 310e according to a twelfth modification of the third embodiment. [Figure 27] FIG. 27 is a diagram showing the configuration of a floating body 350f according to a thirteenth modified example of the third embodiment. [Figure 28] FIG. 28 is a diagram showing the configuration of a floating body 350g according to a fourteenth modified example of the third embodiment. [Figure 29] FIG. 29 is a diagram showing the configuration of a floating body 350h according to a fifteenth modified example 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 (sixteenth 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 a seventeenth modification of the seventh embodiment. [Figure 40] FIG. 40 is a diagram showing the configuration of a wave power generation system 800b according to an eighteenth 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 nineteenth 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 twentieth modification of the seventh embodiment. [Figure 43] FIG. 43 is a diagram showing the configuration of a wave power generator 810e according to a twenty-first 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-second 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-third modified example 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-fourth modification of the seventh embodiment. [Figure 47] FIG. 47 is a diagram showing the configuration of a wave power generation system 800i according to a twenty-fifth 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 twenty-sixth modified example of the eighth embodiment. [Figure 52] FIG. 52 is a diagram showing the configuration of a breakwater member 960b according to a 27th 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 28th modification of the 11th embodiment. [Figure 58] FIG. 58 is a diagram illustrating the configuration of a wave power generation system 1300 according to a 28th modification of the 11th embodiment. [Figure 59] FIG. 59 is a diagram illustrating the configuration of a wave power generation system 1300a according to a twenty-ninth modification of the eleventh embodiment. [Figure 60] FIG. 60 is a diagram illustrating the configuration of a wave power generation system 1300b according to a 30th modification of the 11th embodiment. [Figure 61] FIG. 61 is a diagram illustrating the configuration of a wave power generation system 1300c according to a thirty-first modified example of the eleventh embodiment. [Figure 62] FIG. 62 is a diagram illustrating the configuration of a container 1420 according to a thirty-second modified example. [Figure 63] FIG. 63 is a diagram illustrating the configuration of a container 1420 according to a thirty-second modified example. [Figure 64] FIG. 64 is a diagram illustrating the configuration of a container 1420a according to the thirty-third modified example. [Figure 65] FIG. 65 is a diagram illustrating the configuration of a container 1420b according to the thirty-fourth modified example. [Figure 66] FIG. 66 is a diagram illustrating the configuration of a container 1420b according to a thirty-fourth modified example. [Figure 67] FIG. 67 is a diagram illustrating the configuration of a wave power generation device 1510 according to a thirty-fifth modified example. [Figure 68] FIG. 68 is a diagram illustrating the configuration of a wave power generation device 1610 according to the thirty-sixth modified example. [Figure 69] FIG. 69 is a diagram showing the configuration of a wave power generation device 1710 according to a thirty-seventh modified example. [Figure 70] FIG. 70 is a diagram showing the configuration of a floating body 1850 according to a thirty-eighth modified example. [Figure 71] FIG. 71 is a diagram showing the configuration of a floating body 1850a according to a thirty-ninth modified example. [Figure 72] FIG. 72 is a diagram showing the configuration of a floating body 1850b according to the fortieth modified example. [Figure 73] FIG. 73 is a diagram showing the configuration of a floating body 1850c according to a forty-first modified example. [Figure 74] FIG. 74 is a diagram illustrating the configuration of a wave power generation device 2631 according to a 42nd modified example. [Figure 75] FIG. 75 is a diagram illustrating the configuration of a wave power generation device 2731 according to a 43rd modified example. [Figure 76] FIG. 76 is a diagram illustrating the configuration of a wave power generation device 2731 according to a 43rd modified example. [Figure 77] FIG. 77 is a diagram illustrating the configuration of a wave power generation device 2831 according to a 44th modified example. [Figure 78] FIG. 78 is a diagram illustrating the configuration of a wave power generation device 2931 according to a 45th modified example. [Figure 79] FIG. 79 is a diagram illustrating the configuration of a wave power generation device 3031 according to the 46th modified example. [Figure 80] FIG. 80 is a diagram illustrating the configuration of a wave power generation device 3131 according to the 47th modified example. [Figure 81] FIG. 81 is a diagram illustrating the configuration of a wave power generation device 3231 according to a 48th modified example. DETAILED DESCRIPTION OF THE INVENTION

[0012] 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.

[0013] [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.

[0014] (Configuration of wave power generation device 10) Figure 2 is a plan view of the interior of the housing 12 of the wave power generator 10, viewed from above. As shown in Figure 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, a rope 40a, and a rope 40b. The housing 20 contains the power generator 21, the flywheel 22, the gearbox 23, the shafts 24 to 26, the pulley 31, the pulley 32, a portion of the rope 40a, and a portion of the rope 40b.

[0015] <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.

[0016] <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.

[0017] 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).

[0018] <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 ropes 40a and 40b. Rope 40a has a first portion 41a wound around pulley 31. Rope 40b has a first portion 41b wound around pulley 31. Rope 40b is hung on pulley 32. Pulley 32 rotates around shaft 26 as the axis of rotation in response to the movement of rope 40b. Container 20 includes a bottom plate 20a. Bottom plate 20a includes holes 20b and 20c. Rope 40a and rope 40b extend toward the outside (downward) of container 20 through holes 20b and 20c, respectively. Rope 40a is connected to floating body 50 below container 20. Rope 40b is connected to weight 60 below container 20. That is, the pulley 31 and the pulley 32 are disposed at a position above the floating body 50. The pulley 31 is disposed at a position closer to the quay wall S than the pulley 32.

[0019] <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.

[0020] 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.

[0021] <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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] <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 40b, thereby pulling the floating body 50 via the pulleys 31 to 34. This makes it possible to prevent slack from occurring in the ropes 40a and 40b. 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.

[0027] 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.

[0028] 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.

[0029] <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. Fourth portions 44 of the ropes 40a and 40b are hung on the pulleys 33 and 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.

[0030] <Configuration of the ropes 40a and 40b> As shown in FIG. 6 , the rope 40a includes a second portion 42, a third portion 43, a fourth portion 44, and a fifth portion 45. The rope 40b includes the third portion 43. 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 the upper surface 62 of the sinker 60. The fourth portion 44 is a portion of the rope 40a 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, ropes 40a and 40b extend downward from floating body 50, and are arranged across (via) pulleys 34, 33, 31, and 32, and connected to sinker 60 (arranged in an S-shape). As a result, when floating body 50 rises, ropes 40a and 40b move, causing each pulley to rotate and sinker 60 to rise. When floating body 50 descends, ropes 40a and 40b move, causing each pulley to rotate and sinker 60 to descend. Then, as ropes 40a and 40b move, pulley 31 rotates, and the energy of the rotational motion is converted into electricity by power generation device 21 (power generation).

[0031] In this way, the movement of the ropes 40a and 40b can transmit the motion of the floating body 50 to the power generation device 21. Because the ropes 40a and 40b are string-like, no housing is required to house the ropes 40a and 40b. This prevents the wave power generation device 10 from becoming larger even when 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 when the distance between the top surface of the quay S and the water surface W is large, the wave power generation device 10 can be prevented 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 ropes 40a and 40b 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 various installation locations.

[0032] 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 40a is pulled upward, so that even if the water surface W rises sharply, the rope 40a 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.

[0033] <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, slack can be prevented from occurring in the ropes 40a and 40b that connect the floating body 50 and the sinker 60 via the pulleys 31, 32, 33, and 34.

[0034] <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.

[0035] 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.

[0036] (Detailed configuration of the pulley 31 according to the first embodiment) FIG. 11 is a perspective view showing the configuration of pulley 31 according to the first embodiment. As shown in FIG. 11, pulley 31 includes a portion 31a having a diameter R1 and a portion 31b having a diameter R2 smaller than diameter R1. Portion 31a is formed integrally with portion 31b and rotates integrally with it. Although not shown in FIG. 11, pulley 31 rotates integrally with shaft 24, with shaft 24 serving as the rotation axis.

[0037] Portion 31a has groove 31aa formed in a spiral shape along the axial direction of pulley 31 (left-right direction on the paper in FIG. 11). Portion 31b has groove 31ba formed in a spiral shape along the axial direction of pulley 31 (left-right direction on the paper in FIG. 11). A first portion 41a of rope 40a is wound around groove 31aa of portion 31a. A first portion 41b of rope 40b is wound around groove 31ba of portion 31b. When pulley 31 rotates in one direction, it winds up rope 40a and releases the wound rope 40b. When pulley 31 rotates in the other direction, it releases the wound rope 40a and winds up rope 40b.

[0038] The pulley 31 also has a through hole 31c formed from the outer periphery of the portion 31a to the outer periphery of the portion 31b. The ropes 40a and 40b are continuously disposed in the through hole 31c. That is, in the first embodiment, the ropes 40a and 40b are one continuous rope.

[0039] Here, the diameter R2 of the portion 31b around which the rope 40b connected to the sinker 60 is wound is smaller than the diameter R1 of the portion 31a around which the rope 40a connected to the floating body 50 is wound, and therefore, as shown in Figures 6, 7, and 9, the distance that the sinker 60 moves is shorter than the distance that the floating body 50 moves. As a result, even if the movement range of the sinker 60 is limited, the up and down movement of the floating body 50 can be converted into the rotational movement of the pulley 31, and electricity can be generated by the power generation device 21.

[0040] [First to fifth modified examples of the first embodiment] Next, modified examples (first to fifth 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.

[0041] (First Modification) FIG. 12 is a diagram illustrating the configuration of a pulley 2031 according to a first modified example of the first embodiment. In the present disclosure, instead of a groove, a protrusion 2031aa protruding from an outer peripheral surface 2031ab of the portion 2031a and a protrusion 2031ba protruding from an outer peripheral surface 2031bb of the portion 2031b may be provided, as in the pulley 2031 according to the first modified example shown in FIG. The protrusions 2031aa and 2031ba are formed in a spiral shape. A rope 40a is disposed between adjacent protrusions 2031aa, and a rope 40b is disposed between adjacent protrusions 2031ba. The diameter R1a of the portion 2031a is larger than the diameter R2a of the portion 2031b.

[0042] (Second Modification) 13A to 13C are diagrams showing the configuration of a pulley 2131 according to a second modified example of the first embodiment. The pulley 2131 according to the second modified example shown in Fig. 13A has a portion 2131a and a portion 2131b provided at positions that overlap in the radial direction of the pulley 2131. Note that a diameter R1b of the portion 2131a is larger than a diameter R2b of the portion 2131b.

[0043] As shown in Fig. 13B, portion 2131a has through-hole 2131ca through which rope 40a is placed and secured. Rope 40a is secured to portion 2131a by rope knot 2140aa being hooked onto one end of through-hole 2131ca. As shown in Fig. 13C, portion 2131b has through-hole 2131cb through which rope 40b is placed and secured. Rope knot 2140ba is hooked onto one end of through-hole 2131cb, thereby securing rope 40b to portion 2131b.

[0044] (Third Modification) Fig. 14 is a diagram showing the configuration of a pulley 2231 according to a third modified example of the first embodiment. As shown in Fig. 14, in the pulley 2231 according to the third modified example, a flywheel 2222 is disposed between the portion 31a and the portion 31b.

[0045] (Fourth Modification) FIG. 15 is a diagram illustrating the configuration of a pulley 2331 according to a fourth modified example of the first embodiment. As shown in FIG. 15, the pulley 2331 according to the fourth modified example includes a portion 31a, a portion 31b, a flywheel 2322, and a portion 2331c. The portions 31a, 31b, the flywheel 2322, and 2331c are formed in this order, and the portions 31a, 31b, the flywheel 2322, and 2331c rotate integrally. Neither the rope 40a nor the rope 40b is wound around the portion 2331c, but the connecting portion of the rope 40a and the rope 40b is disposed therein. The pulley 2331 has a through hole 2331d formed from the portion 2331c to the portion 31b, and a through hole 2331e formed from the portion 2331c to the portion 31a. The rope 40b is disposed in the through hole 2331d. The rope 40a is disposed in the through-hole 2331e.

[0046] (Fifth Modification) 16 is a diagram showing the configuration of a pulley 2431 according to a fifth modified example of the first embodiment. As shown in FIG. 16, the pulley 2431 according to the fifth modified example includes a portion 31a, a portion 31b, and a gear 2431c. The gear 2431c meshes with a gear in the gear box 23, and transmits the rotational motion of the pulley 2431 to the gear in the gear box 23.

[0047] (Sixth Modification) Fig. 17 is a diagram showing the configuration of a pulley 2531 according to a sixth modified example of the first embodiment. As shown in Fig. 17, the pulley 2531 according to the sixth modified example includes a portion 31a, a portion 31b, and a shaft portion 2531c disposed between the portions 31a and 31b. The shaft portion 2531c rotates integrally with the portions 31a and 31b.

[0048] (Seventh Modification) Fig. 18 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. 18, a tensioner 80c may be provided to press the third portion 43 of the rope 40a in the horizontal direction. This makes it possible to prevent the rope 40a from slackening.

[0049] [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.

[0050] 19 , the wave power generator 210 includes a pulley 232, ropes 240a and 240b, a float 250, a load member 290, a connecting member 291, a connecting member 292, and a sinker 293. The pulley 232 is disposed below the float 250. The pulley 232 is fixed on the sinker 293. The load member 290 is disposed below the sinker 293. The connecting member 292 is a string-like or chain-like member that connects the load member 290 and the sinker 293. The connecting member 291 connects the load member 290 and the container 220. One end of the connecting member 291 is fixed to the top surface of the load member 290, and the other end of the connecting member 291 is fixed to the bottom surface 220a of the container 220. The load member 290 is disposed 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 if the wave power generation device 210 is placed in a lake or river, the load member 290 is placed on the lake or river bottom.

[0051] Rope 240a includes end 247 connected to hook 251 arranged on the upper surface of float 250. Rope 240a extends upward from end 247 and is wound around pulley 231. Rope 240b is wound around pulley 231, extends downward from pulley 231, passes through pulley 232, and extends upward from pulley 232. Rope 240b includes end 246 connected to hook 252 arranged on the underside of float 250. As a result, when float 250 rises as the water surface W rises, rope 240b is pulled by hook 252. When float 250 descends as the water surface W descends, rope 240a is pulled by hook 251.

[0052] As shown in FIG. 19 , in the second embodiment, the float 250 includes a hole 253a in which a part of the rope 240b is arranged. The hole 253a is a through-hole through which the rope 240b passes in the vertical direction. With this configuration, the rope 240b 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 arranging the rope 240b in the hole 253a, the area (horizontal dimension) in which the rope 240b and the float 250 are arranged can be reduced. As a result, the wave power generation device 210 can be made smaller.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] [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 according to the third embodiment is provided with a weight 360 suspended from a rope 340b.

[0057] As shown in Fig. 20, the wave power generator 310 includes ropes 340a and 340b, a floating body 350, and a sinker 360. The rope 340b is arranged across the pulley 231 and the pulley 232. The end of the rope 340b extending downward from the pulley 231 is connected to the sinker 360. The end of the rope 340a 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.

[0058] [Eighth to fifteenth modified examples of the third embodiment] Next, modifications (eighth to fifteenth modifications) of the third embodiment will be described.

[0059] (Eighth Modification) FIG. 21 is a diagram showing the configuration of a wave power generator 310a according to an eighth 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 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.

[0060] (Ninth Modification) FIG. 22 is a diagram showing the configuration of a wave power generator 310b according to a ninth modification of the third embodiment. As shown in FIG. 22, the wave power generator 310b according to the ninth 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 eighth 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.

[0061] (Tenth Modification) Figure 23 is a diagram showing the configuration of a wave power generator 310c according to a tenth modification of the third embodiment. As shown in Figure 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.

[0062] (Eleventh Modification) Fig. 24 is a diagram showing the configuration of a wave power generator 310d according to an eleventh 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).

[0063] (12th Modification) 25 and 26 are diagrams illustrating the configuration of a wave power generator 310e according to a twelfth modification of the third embodiment. The wave power generator 310e according to the twelfth modification includes a float 350e and a pipe 351e that vertically penetrates the float 350e. In the third embodiment, the recess 255 has a shape that is recessed upward from the bottom surface. However, the recess 255e of the float 350e according to the twelfth 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.

[0064] (13th Modification) 27 is a diagram showing the configuration of a floating body 350f according to a thirteenth 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 inside.

[0065] (14th Modification) 28 is a diagram showing the configuration of a floating body 350g according to a fourteenth 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.

[0066] (15th Modification) 29 is a diagram showing the configuration of a float 350h according to a fifteenth 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.

[0067] [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.

[0068] As shown in Figure 30, the wave power generator 510 is disposed in water and includes a submersible floating body 560 that has buoyancy and functions as a sinker. A rope 40b is connected to the lower end of the submersible floating body 560. The rope 40b extends downward from the submersible floating body 560, passes through pulleys 34 and 33, extends upward, and is wound around pulley 31. 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.

[0069] [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 the wave power generator 610 according to the fifth embodiment. Figure 32 is a cross-sectional view of the wave power generator 610 according to the fifth embodiment. Figure 33 is a diagram showing the configuration of a housing 620 according to the fifth embodiment.

[0070] As shown in Fig. 31 , a wave power generator 610 of the fifth embodiment includes a cylindrical housing 620 having a closed bottom 620a, a pulley 631, a pulley 633, a pulley 634, ropes 640a and 640b, a float 650, and a sinker 660. The pulleys 631, 633, 634, the float 650, and the sinker 660 are arranged inside the housing 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. The rope 640a is connected to the underside of the float 650, and is wound around the pulley 631 via the pulleys 634 and 633. The rope 640b is connected to the top surface of the weight 660.

[0071] 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).

[0072] [Sixth embodiment] Next, the configuration of a wave power generator 710 according to a sixth embodiment will be described with reference to FIGS. 34 and 35. FIGS. 34 and 35 are diagrams illustrating the configuration of the wave power generator 710 according to the sixth embodiment. The wave power generator 710 includes a pulley 731, ropes 740a and 740b, a float 750, and a sinker 760. As shown in FIG. 35, the float 750 has a recess 751 through which the sinker 760 can pass in the vertical direction. The ropes 740a and 740b are hung on the pulley 731, with the rope 740a connected to the float 750 and the rope 740b connected to the sinker 760. In the sixth embodiment, the diameter of the portion around which the rope 740b is wound is larger than the diameter of the portion around which the rope 740a is wound. This allows a large torque to be generated even if the weight of the sinker 760 is small. As a result, the sinker 760 can be made smaller. Furthermore, since the floating body 750 and the sinker 760 can be brought close to each other (overlapped) in the vertical direction, the wave power generator 710 can be made smaller in size in the vertical direction.

[0073] [Modification of the sixth embodiment] (16th Modification) Figure 36 is a cross-sectional view of a wave power generator 710a according to a modification (sixteenth 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.

[0074] [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, ropes 840a and 840b, 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.

[0075] [Modifications of the Seventh Embodiment (Modifications 17 to 25)] Next, modifications of the seventh embodiment (17th to 25th modifications) will be described.

[0076] (17th Modification) Fig. 39 is a diagram showing the configuration of a wave power generation system 800a according to a seventeenth modification of the seventh embodiment. As shown in Fig. 39, the wave power generation system 800a according to the seventeenth 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.

[0077] (18th Modification) FIG. 40 is a diagram showing the configuration of a wave power generation system 800b according to an eighteenth modification of the seventh embodiment. As shown in FIG. 40, the wave power generation system 800b according to the eighteenth modification 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.

[0078] (19th Modification) FIG. 41 is a diagram showing the configuration of a wave power generation system 800c according to a 19th modified example of the seventh embodiment. As shown in FIG. 41, the wave power generation system 800c according to the 19th modified example 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 (18th modified example). The side surface 821c can prevent waves traveling from offshore (waves during emergencies such as typhoons) from traveling toward the float 850 outside the range of angle θ2 from the quay wall S.

[0079] (20th Modification) Fig. 42 is a diagram showing the configuration of a wave power generation system 800d according to a twentieth modification of the seventh embodiment. As shown in Fig. 42, the wave power generation system 800d according to the twentieth modification 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.

[0080] (21st Modification) Fig. 43 is a diagram showing the configuration of a wave power generator 810e according to a twenty-first modified example of the seventh embodiment. As shown in Fig. 43, the wave power generator 810e according to the twenty-first 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.

[0081] (22nd Modification) Fig. 44 is a diagram showing the configuration of a wave power generation system 800f according to a 22nd modified example of the seventh embodiment. As shown in Fig. 44, the wave power generation system 800f according to the 22nd modified example of the seventh embodiment includes a weight container 820f that does not contain a float 850 but 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 float 850 as it extends from the shore toward the open sea, and a wall portion 821f that covers the open sea side of the float 850.

[0082] (23rd Modification) Fig. 45 is a diagram showing the configuration of a wave power generation system 800g according to a 23rd modified example of the seventh embodiment. As shown in Fig. 45, the wave power generation system 800g according to the 23rd 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.

[0083] (24th Modification) Fig. 46 is a diagram showing the configuration of a wave power generation system 800h according to a 24th modified example of the seventh embodiment. As shown in Fig. 46, the wave power generation system 800h according to the 24th 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.

[0084] (25th Modification) Fig. 47 is a diagram showing the configuration of a wave power generation system 800i according to a 25th modified example of the seventh embodiment. As shown in Fig. 47, the wave power generation system 800i according to the 25th 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.

[0085] [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.

[0086] [Modifications of the Eighth Embodiment (Modifications 26 and 27)] Next, modifications (the 27th and 27th modifications) of the eighth embodiment will be described. Fig. 51 is a diagram showing the configuration of a breakwater member 960a according to the 26th modification of the eighth embodiment. Fig. 52 is a diagram showing the configuration of a breakwater member 960b according to the 27th 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.

[0087] [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.

[0088] [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.

[0089] [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.

[0090] 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.

[0091] [Modifications of the eleventh embodiment (Modifications 28 to 31)] Next, modifications of the eleventh embodiment (28th to 31st modifications) will be described.

[0092] (28th Variation) 57 and 58 are diagrams illustrating the configuration of a wave power generation system 1300 according to a 28th modified example of the 11th 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 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.

[0093] (29th Variation) Figure 59 is a diagram illustrating the configuration of a wave power generation system 1300a according to a 29th modified example of the 11th embodiment. As shown in Figure 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.

[0094] (30th Variation) Fig. 60 is a diagram illustrating the configuration of a wave power generation system 1300b according to a 30th modified example of the 11th 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.

[0095] (31st Modification) Fig. 61 is a diagram illustrating the configuration of a wave power generation system 1300c according to a thirty-first 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-like member. 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.

[0096] [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 modifications (first to thirty-first modifications) may be combined in any way, and the modifications shown below may also be combined.

[0097] (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-third modified example shown in Fig. 62 and Fig. 63 and the container 1420a according to a thirty-fourth modified example shown in Fig. 64.

[0098] (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-second modified example shown in Figures 62 and 63 and the container 1420b according to the thirty-fourth modified example shown in Figures 65 and 66.

[0099] (32nd Variation) 62 and 63 are diagrams illustrating the configuration of a storage body 1420 according to a 32nd 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.

[0100] 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.

[0101] (33rd Variation) Fig. 64 is a diagram illustrating the configuration of a storage body 1420a according to the thirty-third 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.

[0102] (34th Variation) 65 and 66 are diagrams illustrating the configuration of a housing 1420b according to a thirty-fourth 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.

[0103] (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-fifth modified example shown in Fig. 67, a spiral spring 1531a fixed to a pulley 1531 and winding up a first rope 1541 may be provided.

[0104] (35th Variation) FIG. 67 is a diagram illustrating the configuration of a wave power generator 1510 according to a thirty-fifth 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.

[0105] (4) In the first to eleventh embodiments, no example is shown in which another pulley is 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-seventh modified example shown in Fig. 68, a pulley 1632 may be further disposed above the pulley 1631.

[0106] (36th Variation) FIG. 68 is a diagram illustrating the configuration of a wave power generator 1610 according to the thirty-sixth 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.

[0107] (5) In the second embodiment described above, an example was shown in which the entire underside of the load member 290 contacts the seabed G as shown in Fig. 19, but the present disclosure is not limited to this. (37th Modification) For example, as in a wave power generation device 1910 according to the 37th modification shown in Fig. 69, one side 1290aa of the underside of the first load member 1290a contacts the seabed G, while 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 240b can be prevented via the pulley 232.

[0108] (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 38th to 41st modified examples shown in Figs. 70 to 73 may be used in a wave power generator. (38th Modification) A float 1850 according to the 38th 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. (39th Modification) A float 1850a according to the 39th 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. (Fortieth Modification) A float 1850b according to the fortieth 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-first Modification) A float 1850c according to the fortieth 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.

[0109] (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.

[0110] (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.

[0111] (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.

[0112] (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).

[0113] (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.

[0114] (12) In the above eleventh embodiment (28th variant), 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.

[0115] (13) In the first to eleventh embodiments, examples have been shown in which the pulleys are configured so that the diameter of the first portion is different from the diameter of the second portion, but the present disclosure is not limited to this. (Forty-Second Modification) As in the pulley 2631 of the forty-second modification shown in Figure 74, the pulley 2631 may be configured so that the diameter of the first portion 2631a is the same as the diameter of the second portion 2631b.

[0116] (14) In the first to eleventh embodiments, examples have been described in which the rope is wound spirally around the pulley. However, the present disclosure is not limited thereto. (43rd Modification) As shown in FIGS. 75 and 76 , a pulley 2731 of a 43rd modification may be provided with a first portion 2731a around which the rope 40a is wound and overlapped in the radial direction, and a second portion 2731b around which the rope 40b is wound and overlapped in the radial direction. The pulley 2731 includes a shaft portion 2731c that serves as a rotation axis for the first portion 2731a and the second portion 2731b and rotates integrally with the first portion 2731a and the second portion 2731b. As shown in FIG. 76, the rope 40a and the rope 40b are connected within a through-hole 2731ca provided in the shaft portion 2731c.

[0117] (14) In the first to eleventh embodiments, examples of through holes have been described, but the present disclosure is not limited thereto. For example, as in a pulley 2831 of a 44th modified example shown in FIG. 77 (44th modified example), a plurality of through holes 2831c extending in the same direction may be provided. Alternatively, as in a pulley 2931 of a 45th modified example shown in FIG. 78 (45th modified example), a plurality of through holes 2931c extending in different directions (for example, a star shape) may be provided. Furthermore, as in a pulley 3031 of a 46th modified example shown in FIG. 79 (46th modified example), a through hole 3031ca through which the rope 40a is arranged may be provided in the first portion 3031a, a through hole 3031cb through which the rope 40b is arranged may be provided in the second portion 3031b, and a through hole 3031cc extending from the first portion 3031a to the second portion 3031b may be further provided.

[0118] (15) In the first to eleventh embodiments, examples have been described in which the rope is wound around the pulley, but the present disclosure is not limited thereto. For example, as in the pulley 3131 of the 47th modified example shown in Fig. 80 (47th modified example), a through-hole 3131a to which the rope 40a is fixed may be provided in one portion (first portion) of the pulley 3131, and a through-hole 3131b to which the rope 40b is fixed may be provided in the other portion (second portion) of the pulley 3131, and the ropes 40a and 40b may be wound alternately in the axial direction of the pulley 3131. Furthermore, (48th Variant) As in the pulley 3231 of the 48th variant shown in Figure 81, a through hole 3131a to which the rope 40a is fixed is provided in one side portion (first portion) of the pulley 3131, and a through hole 3231b to which the rope 40b is fixed is provided in the central portion (second portion) of the pulley 3231, and the ropes 40a and 40b may be wound alternately in the axial direction of the pulley 3131.

[0119] The present disclosure can also be explained as follows.

[0120] A wave power generator according to a first configuration includes 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 including a weight, a first part, and a second part, the first part and the second part rotating integrally, a first rope partially wound around the first part and pulled by the float, a second rope partially wound around the second part and pulled by the weight, and a power generating unit that converts the rotational motion of the first pulley into electric power. The first pulley includes a through hole through which the first rope and the second rope are connected inside (first configuration).

[0121] According to the first configuration, even if the first rope and the second rope come into contact with water, they are less likely to deteriorate than metal chains. Furthermore, because the first rope and the second rope are connected within the through-hole of the first pulley, the first rope and the second rope can be easily fixed to the first pulley.

[0122] A wave power generator according to a second configuration includes 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 including a weight, a first portion, and a second portion, with the first portion and the second portion rotating integrally, a first rope partially wound around the first portion and pulled by the float, a second rope partially wound around the second portion and pulled by the weight, and a power generating unit that converts the rotational motion of the first pulley into electric power. The first pulley includes a first through hole in which the first rope is arranged and fixed, and a second through hole in which the second rope is arranged and fixed (second configuration).

[0123] According to the second configuration, even if the first rope and the second rope come into contact with water, they are less likely to deteriorate than metal chains.

[0124] In the first or second configuration, the diameter of the second portion may be larger than the diameter of the first portion (third configuration).

[0125] According to the third configuration, the diameter of the second portion is larger than the diameter of the first portion, so that a large torque can be generated even if the weight of the weight pulling the second rope wound around the second portion is small. This prevents slack from occurring in the first rope. As a result, even if the size of the weight is limited, it is possible to convert up-and-down motion into rotational motion and generate electricity.

[0126] In the first or second configuration, the diameter of the second portion may be smaller than the diameter of the first portion (fourth configuration).

[0127] According to the fourth configuration, the diameter of the second portion is smaller than the diameter of the first portion, so the second rope wound around the second portion can be configured to be short. This reduces the movement range of the sinker, so even if the movement range of the sinker is limited, the up and down movement of the float can be converted into rotational movement of the first pulley, and electricity can be generated by the power generation unit. As a result, even if the movement range of the sinker is limited, the up and down movement can be converted into rotational movement, and electricity can be generated.

[0128] In any one of the first to fourth configurations, the first portion may have a groove formed in a spiral shape along the axial direction of the first portion, and the first rope may include a portion wound around the groove (fifth configuration).

[0129] According to the fifth configuration, the first rope can be wound in association with the rotation of the first pulley.

[0130] In any one of the first to fifth configurations, the wave power generator may further include a second pulley arranged at a position below the floating body, and the first rope may be connected to a lower end of the floating body via the second pulley (sixth configuration).

[0131] Here, the speed at which the water surface rises due to waves may usually be higher than the speed at which the water surface falls due to waves. In this case, if the float is suspended and the float rises sharply, the first pulley may not be able to reel in the first rope in time, causing the first rope to slacken. In contrast, according to the sixth configuration, when the float moves sharply, the first rope is pulled, and when the float moves slowly, the first rope is reeled in by the first pulley. As a result, when the float moves sharply, the first rope does not slacken, so that up and down motion can be reliably converted into rotational motion.

[0132] In any one of the first to fourth configurations, the wave power generator may further include a third pulley arranged at a position below the floating body. The sinker may be fixed to the third pulley so as to apply a load to the third pulley. The second rope may be connected to a lower end of the floating body via the third pulley. The first rope may be connected to an upper end of the floating body (seventh configuration).

[0133] According to the seventh configuration, the first rope is connected to the upper end of the float and the second rope is connected to the lower end of the float, thereby preventing the float from moving (swaying) horizontally.

[0134] An eighth configuration of the driving force transmission device includes a moving member that moves up and down due to an external force, a first pulley that includes a weight, a first part, and a second part, the first part and the second part rotating integrally, a first rope that is partially wound around the first part and pulled by the moving member, and a second rope that is partially wound around the second part and pulled by the weight. The first pulley includes a through hole through which the first rope and the second rope are connected internally (eighth configuration).

[0135] A driving force transmission device according to a ninth configuration includes a moving member that moves up and down due to an external force, a first pulley that includes a weight, a first part, and a second part, the first part and the second part rotating integrally, a first rope that is partially wound around the first part and pulled by the moving member, and a second rope that is partially wound around the second part and pulled by the weight. The first pulley includes a first through hole in which the first rope is arranged and fixed, and a second through hole in which the second rope is arranged and fixed (ninth configuration).

[0136] According to the eighth or ninth configuration, deterioration can be prevented even in a location where there is a high possibility of contact with water. [Explanation of symbols]

[0137] 10: wave power generator, 10d: 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, 25: shaft, 26: shaft, 27: beam member, 28: box member, 29: container, 29a: upper surface, 31: pulley, 31a: part, 31aa: groove, 31b: part, 31ba: groove, 31c: through hole, 32: pulley, 33: pulley, 34: pulley , 40a: rope, 40b: rope, 41a: first part, 41b: first part, 42: second part, 43: third part, 44: fourth part, 45: fifth part, 46: end, 47: end, 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, 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: cushion material, 222: flywheel, 231: pulley, 232: pulley, 232c: pulley, 240a: rope, 240b: 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: load member, 290aa: load member, 290ab: load member, 290b: load member, 290 c: load member, 290ca: protrusion, 291: connecting member, 291ab: convex portion, 292: connecting member, 292ab: concave portion, 293: weight, 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, 340a: rope, 340b: 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: sinker, 391a: rod member, 391b: rod member, 510: wave power generator, 550: float, 552: load member, 560: underwater float, 610: wave power generator, 620: container, 620a: bottom, 621: hole, 631: pulley, 633: pulley, 634: pulley, 640a: rope, 640b: rope, 650: float, 651: roller, 660: sinker, 710: wave power generator, 710a: wave power generator, 731: pulley, 740a: rope, 740b: rope, 750: float, 750a: float, 751: recess, 751a: through hole, 760: sinker, 760a: sinker, 80 0: wave power generation system, 800a: wave power generation system, 800b: wave power generation system, 800c: wave 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, 821b: side, 821c: side, 821d: side, 821f: wall portion, 821g: wall portion, 821h: wall portion, 821i: wall portion, 822: second member, 822a: side, 822f: wall portion, 822h: wall portion, 822i: wall portion, 823e: part, 831: pulley, 840a: rope, 840b: rope, 850: float, 860: sinker, 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, 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, 1420: container, 1420a: container, 1420b: container, 1421: upper surface,1421a: upper surface, 1421b: frame, 1422: hinge, 1422b: case, 1423: string member, 1427: pillar member, 1510: wave power generator, 1531: pulley, 1531a: spiral spring, 1532: pulley, 1533: pulley, 1541: first rope, 1542: 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 generation device, 1822g: wall portion, 1850: floating body, 1850a: floating body, 1850b: floating body, 1850c: floating body, 1851: upper surface, 1851a: main body, 1851c: central portion, 1852: recess, 1852a: protrusion, 1852b: protrusion, 1852c: inclined surface, 1853c: recess, 1910: wave power generation device, 2031: pulley, 2031a: portion, 2031aa: protrusion, 2031ab: outer peripheral surface, 2031b: portion, 2031ba: protrusion, 2031bb: outer peripheral surface, 2131: pulley , 2131a: part, 2131b: part, 2131ca: through hole, 2131cb: through hole, 2140aa: eye, 2140ba: eye, 2222: flywheel, 2231: pulley, 2322: flywheel, 2331: pulley, 2331c: part, 2331d: through hole, 2331e: through hole, 2431: pulley, 2431c: gear, 2531: pulley, 2531c: shaft, 2631: pulley, 2631a: first part, 2631b: second part, 2731: pulley, 2731a: first part, 2 731b: second part, 2731c: shaft part, 2731ca: through hole, 2831: pulley, 2831c: through hole, 2931: pulley, 2931c: through hole, 3031: pulley, 3031a: first part, 3031b: second part, 3031ca: through hole, 3031cb: Through hole, 3031cc: Through hole, 3131: Pulley, 3131a: Through hole, 3131b: Through hole, 3231: Pulley, 3231b: Through hole, 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; With a weight, a first pulley including a first portion and a second portion, the first portion and the second portion rotating integrally; a first rope partially wound around the first portion and pulled by the floating body; a second rope partially wound around the second portion and pulled by the weight; 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 through hole through which the first rope and the second rope are connected internally.

2. 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; With a weight, a first pulley including a first portion and a second portion, the first portion and the second portion rotating integrally; a first rope partially wound around the first portion and pulled by the floating body; a second rope partially wound around the second portion and pulled by the weight; a power generating unit that converts the rotational motion of the first pulley into electric power, The first pulley is a first through hole in which the first rope is disposed and to which the first rope is fixed; a second through hole through which the second rope is disposed and to which the second rope is fixed.

3. The wave power generator according to claim 1 or 2, wherein the diameter of the second portion is larger than the diameter of the first portion.

4. The wave power generator according to claim 1 or 2, wherein the diameter of the second portion is smaller than the diameter of the first portion.

5. the first portion has a groove portion formed spirally along the axial direction of the first portion, The wave power generator according to claim 1 or 2, wherein the first rope includes a portion wound around the groove.

6. Further, a second pulley is disposed at a lower position relative to the floating body, The wave power generator according to claim 1 or 2, wherein the first rope is connected to a lower end of the floating body via the second pulley.

7. Further provided is a third pulley arranged at a lower position relative to the floating body, the weight is fixed to the third pulley so as to apply a load to the third pulley; the second rope is connected to the lower end of the floating body via the third pulley, The wave power generator according to claim 1 or 2, wherein the first rope is connected to an upper end of the float.

8. a moving member that moves up and down due to an external force; With a weight, a first pulley including a first portion and a second portion, the first portion and the second portion rotating integrally; a first rope partially wound around the first portion and pulled by the moving member; a second rope partially wound around the second portion and pulled by the weight; The first pulley includes a through hole through which the first rope and the second rope connect.

9. a moving member that moves up and down due to an external force; With a weight, a first pulley including a first portion and a second portion, the first portion and the second portion rotating integrally; a first rope partially wound around the first portion and pulled by the moving member; a second rope partially wound around the second portion and pulled by the weight; The first pulley is a first through hole in which the first rope is disposed and to which the first rope is fixed; a second through hole through which the second rope is disposed and to which the second rope is fixed.

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