Wave power generation device

Abstract

To provide a wave power generation device in which a positional relation between components can be installed accurately, and installation work is easy and kept safe, and which is installed on a quay or the like, and can be protected by being easily removed from the quay or the like in bad weather.SOLUTION: A wave power generation device is composed of: a float 1; a device body 6 housing a rack 2, a pinion 3, a speed increase mechanism 4, and a generator 5; a float guide 8 provided with an installation fixing frame 10 serving as fixing during installation, housing the device body 6, the float 1 and the rack 2, and guiding the vertical movement of the rack 2 coupled to the float 1 to transmit it to the device body 6 and generate power; and a device holding part 10 installed on a quay or the like, and hanging and fixing the float guide 8.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wave power generation device that generates electricity by installing a device on a quay wall or the like in wave power generation that generates electricity using the energy of ocean waves, and transmitting the movement of a float that moves up and down with waves to a generator to generate electricity.

Background Art

[0002] Conventionally, various wave power generation devices have been proposed that include a float arranged in a vertically movable state and generate electricity using the energy when the float moves up and down due to the vertical movement of the water surface.

[0003] Fig. 7 shows a conventional wave power generation device 100. It includes a wave receiving member 101 that receives waves, a wave receiving float 102 provided on the front surface of the wave receiving member 101 that can move up and down with waves, a rack member 103 provided on the back surface of the wave receiving float 102, a pinion 104 that meshes with the rack member 103, and a power generation device 105 that generates electricity by the rotation of the pinion 104. The pinion 104 and the power generation device 105 are provided in a space 107 of an upper concrete 106.

[0004] When the wave receiving float 102 provided on the front surface of the wave receiving member 101 rises with waves, the back surface of the wave receiving float 102 meshes with the rack member 103 provided on the wave receiving member 101 and the pinion 104, and the pinion 104 rotates due to the rise of the wave receiving float 102. Therefore, the power generation device 105 generates electricity in response to the rotation.

[0005] As shown in Fig. 8, a plurality of vertically movable wave receiving floats 102 are arranged at predetermined intervals on the upper concrete 106. Steel materials with an H-shaped cross-section are fixed as guide members 108 at predetermined intervals on the front surface 106c of the upper concrete 106. Guide grooves 108d are formed in the vertical direction on both sides of a connecting surface 108c that connects the front surface 108a and the back surface 108b of the guide member 108.

[0006] As shown in Fig. 9, the wave receiving float 102 is in the shape of a rectangular plate with a hollow interior and is made of, for example, steel. The wave receiving float 102 is attached to the guide grooves 108d on both sides of the guide member 108 so as to be vertically movable with both sides being thin plate portions 102b thinner than the plate thickness of the central portion 102a. A wave receiving portion 101 in the shape of a protrusion protruding forward is formed at the lower end of the central portion 102a of the wave receiving float 102. The wave receiving float 102 is formed in a substantially L shape. When the wave receiving portion 101 receives a wave, the wave receiving float 102 is lifted and rises along the guide groove 108d of the guide member 108.

[0007] In Fig. 9, for example, two rack members 103 are attached vertically to the back surface of the wave receiving float 102. A plurality of, for example, four rollers 108 are rotatably embedded outside the rack member 103. The rollers 109 are installed on the upper and lower sides on both the left and right sides of the back surface. The rollers 109 can smooth the lifting and lowering movement of the wave receiving float 102 with respect to the upper concrete 106 when the wave receiving float 102 moves up and down.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0009] In the wave power generation device of Patent Document 1, a box-shaped space is formed in the upper concrete, and a pinion and a power generation device for generating power by receiving its rotation are installed. However, it is difficult to install the box-shaped space while maintaining an accurate positional relationship, which is costly, and waves may invade and cause damage during bad weather such as typhoons. It is difficult to provide a box-shaped space in the upper concrete. Especially, it is almost impossible with existing upper concrete.

[0010] A plurality of wave-receiving floats are arranged at predetermined intervals along the extending direction on the upper concrete which is a breakwater, guide members are fixed at predetermined intervals, and guide grooves are formed on both side portions of the guide members. However, it is difficult to install and fix them while maintaining an accurate positional relationship with the upper concrete. The work on the vertical surface of the quay wall is highly difficult, requires a large crane, etc., and there are waves, making it a dangerous operation, and it is also difficult to maintain the safety of the work. The cost also becomes high. Also, it is stated that a plate-shaped steel plate is installed and fixed to the rear surface of the steel plate and the upper concrete by welding, bolts, etc., but similarly, a large crane, etc., is required, it is difficult to maintain the safety of the work, and the cost also becomes high.

[0011] The wave-receiving float is in the shape of a square plate and has a hollow interior, and is made of steel, for example. The wave-receiving float has a thin plate portion thinner than the plate thickness at the center attached to the guide groove of the guide member. Moreover, a wave-receiving portion protruding forward is formed at the lower end. However, if it is made of steel and has a hollow interior, it involves welding, etc. for preventing water intrusion, which is technically costly and difficult. Forming a thin plate portion with a small thickness by the wave-receiving float itself is also technically costly and difficult.

[0012] A rack member is attached to the back surface of the wave-receiving float in the vertical direction. And a plurality of rollers are rotatably embedded outside the rack member. However, the wave-receiving float performs a lifting and lowering motion by the force of tilting when receiving waves, and it may be difficult to rotate the pinion with the rack member. The rollers may also be submerged in seawater, and may stop rotating due to corrosion, and smooth lifting and lowering motion may not be possible.

Means for Solving the Problems

[0013] In order to solve the above problems, the wave power generation device according to claim 1 of the present invention includes a float that moves up and down with waves, two racks connected to the float and moving up and down, two sets of meshing between the two racks, and two pinions that transmit in the same rotation direction during ascent and descent next, a speed increasing mechanism that increases the rotation speed of this pinion and transmits it to a generator, a generator that generates electricity in the same rotation direction by this speed increasing mechanism, a device main body that houses the pinion, the speed increasing mechanism, and the generator, and is installed on a vertical wall such as a quay wall, guides the up and down movement of the float and the rack connected to this float, houses the device main body, and is provided with an installation fixing frame that suspends and fixes the device, and a float guide, and a device holding part installed on a quay wall or the like that suspends and fixes the float guide.

[0014] According to the above invention, when the wave rises, the float guide guides it, and the rack connected to the float also rises together. The rack rotates the pinion, but in set A of the rack and the pinion, the pinion transmits the rotation to the speed increasing mechanism, and set B does not transmit. When the wave descends, the rack also descends together and rotates the pinion, but in set B of the rack and the pinion, the pinion transmits the rotation to the speed increasing mechanism, and set A does not transmit. In both ascent and descent, the speed increasing mechanism rotates the generator in the same direction at a predetermined rotation speed to generate electricity.

[0015] Since the float guide houses the device main body, the rack, and the float, their relative positional relationships are maintained with high precision, industrial production is possible, and power generation operation can be carried out efficiently and stably. Furthermore, since the float guide is inserted into the device holding part, the installation work only requires installing the device holding part on a quay wall or the like, does not require a crane or the like, does not involve welding work, and ensures work safety. There is no need to provide a space on the quay wall to house the device main body. Naturally, the installation cost is low.

[0016] The wave power generation device according to claim 2 is such that the device main body houses the pinion, the speed increasing mechanism, and the generator by adding an installation fixing frame and a rack, the float guide separates the installation fixing frame, the device main body, and the rack and guides only the up and down movement of the float, and the device holding part suspends and fixes the device main body.

[0017] According to the above invention, when the wave rises, the float guide guides the float, and the rack connected to the float also rises together. The rack rotates the pinion, but in the set A of the rack and the pinion, the pinion transmits the rotation to the speed increasing mechanism, while in set B, it does not. When the wave descends, the rack also descends together to rotate the pinion, but in the set B of the rack and the pinion, the pinion transmits the rotation to the speed increasing mechanism, while in set A, it does not. In both the ascending and descending processes, the speed increasing mechanism rotates the generator in the same direction at a predetermined rotational speed to generate electricity.

[0018] Since the float guide houses the float and the device body houses the installation and fixing frame, rack, pinion, speed increasing mechanism, and generator, their relative positional relationships are maintained with high precision, enabling industrial production and efficient and stable power generation operation. The installation work only requires installing the float guide and the device holding part on the quay wall or the like, without the need for a crane or welding work, ensuring work safety. Naturally, the installation cost is low.

[0019] For the wave power generation device according to claim 3, the device holding part inserts the installation and fixing frame in the horizontal position, and is provided with a device holding part C-shaped channel that rotates horizontally to vertically on the left and right, and a vertical position holding channel that stops the rotation of the device holding part C-shaped channel in the vertical position.

[0020] According to the above invention, when the device holding part has its device holding part C-shaped channel in the horizontal position and inserts the device body having the installation and fixing frame or the float guide and rotates it vertically, the device can be installed. When inserting the device body, a float guide needs to be installed on the quay wall separately. Work safety is ensured, and the installation work can be easily carried out. The installation cost is low.

[0021] The wave power generation device according to claim 4 is such that the float guide is provided with a vertical movement guide frame that moves vertically left and right with respect to the surface of the quay wall, and a vertical movement guide channel that slides on the outer surface of this vertical movement guide frame is provided. A float and a rack are connected to this vertical movement guide channel. Further, a device body guide channel is provided where the device body slides upward and is inserted and held at a predetermined position.

[0022] According to the above invention, since the float guide houses the device body, the float, and the rack, their relative positional relationships are maintained with high precision, industrial production is possible, and power generation operation can be carried out efficiently and stably. During bad weather such as typhoons, the float guide can be lifted from the vertical to the horizontal to pull out the main three components from the float guide, and the float guide can also be pulled out and separated from the device body to take shelter in a place where there is no influence from the typhoon.

[0023] The wave power generation device according to claim 5 is such that the float guide is provided with a vertical movement guide frame that guides the vertical movement of the float left and right at the part with respect to the surface of the quay wall. To maintain the mutual spacing of this vertical movement guide frame, a plurality of float guide horizontal frames are provided from the upper end to the lower end. A float guide protection frame in a U-shape is provided that is connected to this float guide horizontal frame and surrounds the outer shape of the float. A float sliding frame is provided that is positioned and connected vertically with a plurality of horizontal float guide protection frames. On one float, a float sliding plate that moves vertically while contacting the float sliding frame is provided. Further, a float vertical movement guide part is provided with a structure such that it does not become disengaged from the vertical movement guide frame while moving vertically. Also, a connection frame for the rack that transmits the vertical movement of the float to the rack is provided. On the other hand, the vertical movement guide frame has a structure such that the float vertical movement guide part does not become disengaged while moving it vertically.

[0024] According to the above invention, in bad weather with strong winds, the moment load received by the float may exceed the allowable value of materials such as aluminum. However, the U-shaped float guide protection frame can suppress the lateral sway of the float, reduce the moment, and prevent destruction. When the wind speed is low, power generation can also be maintained by the up-and-down movement while the float sliding plate and the float sliding frame are in contact with each other.

[0025] In the wave power generation device according to claim 6, in the float guide, the up-and-down movement guide frame is a grooved frame material with grooves provided on two sides to four sides of a quadrilateral cross-section, the up-and-down movement guide channel covers the outer surface of this grooved frame material, and a plurality of slide screws that slide in grooves are inserted into the grooves corresponding to the grooves of the grooved frame material. On its central plane, both sides of the rack are integrally fixed by sandwiching them with two L-shaped channels for the rack.

[0026] According to the above invention, the rack is integrally fixed to the up-and-down movement guide channel. The up-and-down movement guide channel inserts slide screws into the grooves of the grooved frame material, which is the up-and-down movement guide frame, to prevent detachment and enable stable up-and-down movement. This structure is simple and can be industrially produced at a low cost.

Advantages of the Invention

[0027] According to the present invention, since the device main body, the rack, and the float are housed in the float guide, their relative positional relationships are maintained with high precision, industrial production is possible, and power generation operation can be carried out efficiently and stably. Furthermore, since the float guide housing the device main body, the rack, and the float is inserted into the device holding part, the installation work only requires installing the device holding part on a quay wall or the like, without the need for a crane or the like and without welding work, and the safety of the work is ensured. There is also no need to provide a space on the quay wall for housing the device main body. Naturally, the installation cost is low.

[0028] The float is stored in the float guide, and since the device body is connected to the rack stored in the float guide, their relative positional relationship is maintained with high precision, enabling industrial production and efficient and stable power generation operation. The installation work only requires installing the float guide and the device holding part on the quay wall or the like, without the need for a crane or the like, and without welding work, ensuring work safety. Naturally, the installation cost is low.

[0029] According to the present invention, when the device holding part has its C-shaped channel horizontal and inserts the device body or the float guide having the installation fixing frame and rotates it vertically, the device can be installed. When inserting the device body into this device holding part, a float guide is separately installed on the quay wall. Work safety is ensured, and the installation work can be easily carried out. The installation cost is low.

[0030] According to the present invention, since the float guide houses the device body, the float, and the rack, their relative positional relationship is maintained with high precision, enabling industrial production and efficient and stable power generation operation. During bad weather such as typhoons, which are important for device maintenance, the float guide can be raised from vertical to horizontal to pull out the main part from the float guide, and the float guide can also be pulled out and separated from the device body to take shelter in a place where there is no influence from the typhoon.

[0031] According to the present invention, during bad weather with strong winds, the moment load received by the float may exceed the allowable value of aluminum or the like and cause destruction. However, the U-shaped float guide protection frame can suppress the lateral sway of the float, reducing the moment and preventing destruction. When the wind speed is low, power generation can also be maintained by the up-and-down movement while the float sliding plate and the float sliding frame are in contact.

[0032] According to the present invention, since the up-and-down movement guide frame uses a grooved frame material, the up-and-down movement guide channel integrated with the rack can insert a slide screw into the groove of the up-and-down movement guide frame to enable stable up-and-down movement while preventing the up-and-down movement from coming off. This structure is simple, can be industrially produced, and can be realized at a low cost.

Brief Description of the Drawings

[0033]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

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Figure 8

Figure 9

Mode for Carrying Out the Invention

[0034] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the solution means of the invention.

[0035] In FIG. 1, there are a float 1 that floats on the sea surface and moves up and down due to the up and down movement of waves, two racks 2 connected to this float 1 that move up and down, two pinions 3 that engage the two racks 2 in two sets and transmit the rotation in the same direction for both upward and downward movements, a speed increasing mechanism 4 that increases the rotational speed of the two pinions 3, a generator 5 that rotates in the same direction by the speed increasing mechanism 4 to generate electricity, a device main body 6 that houses the pinions 3, the speed increasing mechanism 4, and the generator 5, an installation fixing frame 8 that is installed on a wall perpendicular to the sea surface such as a quay wall 7, guides the up and down movement of the float 1 and the racks 2 connected to this float 1, houses the device main body 6, and serves as a suspension and fixing role during the installation of the device, and a device holding part 10 that is installed on the quay wall or the like and suspends and fixes the float guide 9, which constitutes a wave power generation device 50a.

[0036] When the wave rises, the float guide 9 guides and the rack 2 connected to the float 1 also rises together. The rack 2 rotates the pinion 3, but for the set A of the rack 2 and the pinion 3, the pinion 3 transmits the rotation to the speed increasing mechanism 4, while the set B does not transmit. When the wave descends, the float 1 and the rack 2 also descend together to rotate the pinion 3, but for the set B of the rack 2 and the pinion 3, the pinion transmits the rotation to the speed increasing mechanism 4, while the set A does not transmit. In both upward and downward movements, the speed increasing mechanism 4 rotates the generator 5 in the same direction at a predetermined rotational speed to generate electricity.

[0037] Since the pinions 3, the speed increasing mechanism 4, and the generator 5 are housed in the device main body 6, and the device main body 1, the rack 2, and the float 1 are housed in the float guide 9, their relative positional relationships are maintained with high precision, industrial production is possible, and power generation operation can be carried out efficiently and stably. Furthermore, since the float guide 9 that houses the device main body 1, the rack 2, and the float is inserted into the device holding part 10, the installation work only requires installing the device holding part 10 on the quay wall 7 or the like, does not require a crane or the like, and there is no welding work, ensuring work safety. Naturally, the installation cost is low.

[0038] In FIG. 2, the apparatus main body 6 houses the pinion 3, the speed increasing mechanism 4, and the generator 5 in addition to the installation and fixing frame 8 and the rack 2. The float guide 9 separates the installation and fixing frame 9, the apparatus main body 6, and the rack 2 to guide the vertical movement of the float 1. The apparatus holding part 10 suspends and fixes the apparatus main body 6. In this way, the wave power generation device 50b is configured.

[0039] When the wave rises, the float guide 9 guides and the rack 2 connected to the float 1 also rises together. The rack 2 rotates the pinion 3. However, for the set A of the rack 2 and the pinion 3, the pinion 3 transmits the rotation to the speed increasing mechanism 4, while for the set B, it does not. When the wave descends, the float 1 and the rack 2 also descend together to rotate the pinion 3. However, for the set B of the rack 2 and the pinion 3, the pinion transmits the rotation to the speed increasing mechanism 4, while for the set A, it does not. In both the rising and falling processes, the speed increasing mechanism 4 rotates the generator 5 in the same direction at a predetermined rotational speed to generate electricity.

[0040] The rack 2, the pinion 3, the speed increasing mechanism 4, and the generator 5 are housed in the apparatus main body 6, and the float 1 is housed in the float guide 9. Since the rack 2 housed in the apparatus main body 1 and the float guide 9 is connected, their relative positional relationship is maintained with high precision, industrial production is possible, and power generation operation can be carried out efficiently and stably. The installation work only requires installing the float guide 9 and the apparatus holding part 10 on the quay wall 7 or the like, without the need for a crane or the like, and there is no welding work, ensuring work safety. Naturally, the installation cost is low.

[0041] In FIG. 3, the apparatus holding part 10 is provided with apparatus holding part C-shaped channels 12 that are horizontally inserted into the installation and fixing frame 8 at the horizontal position and rotate from horizontal to vertical around the rotating shaft 11 on the left and right. A vertical position holding channel 13 is provided to stop the rotation of the apparatus holding part C-shaped channels 12 at the vertical position. A fall prevention part 14 is provided to fix the inserted installation and fixing frame 8 so that it does not fall into the sea after the apparatus holding part C-shaped channels 12 are rotated vertically.

[0042] The device holding part 10 can install the device by inserting the device body 6 or the float guide 9 having the installation and fixing frame 8 with the C-shaped channel 12 of the device holding part horizontal and then rotating it vertically. When inserting the device body 6, the float guide 9 is separately installed on the quay wall. It can ensure the safety of the work and enable easy installation work. Naturally, the installation cost is low.

[0043] In Fig. 4, on the float guide 8, left and right vertical movement guide frames 15 are provided with respect to the surface of the quay wall 7, and vertical movement guide channels 16 that cover and slide on the outer surface of the vertical movement guide frames 15 are provided. The float 1 is connected to the vertical movement guide channel 16 by a connecting part 17. Similarly, the rack 2 is also connected. Further, device body guide channels 18 into which the device body 6 slides and is inserted are provided on the upper part with respect to the sea surface. The device body 6 is prevented from falling and stopping at a predetermined position in the device body guide channels 18. The device body 6 is provided with a device body installation frame 19 for inserting it into the device body guide channels 18.

[0044] Since the float guide 8 houses the device body 6, the float 1, and the rack 2, their relative positional relationships are maintained with high precision, industrial production is possible, and power generation operation can be carried out efficiently and stably. In the event of bad weather such as typhoons, which are important for device maintenance, the float guide 8 can be lifted from vertical to horizontal to pull out the main components from the float guide 8, and the float guide 8 can also be pulled out and separated from the device body 6 to take shelter in a place where there is no influence from the typhoon.

[0045] In FIG. 5, the float guide 8 is provided with a vertical movement guide frame 15 for guiding the vertical movement of the floats 1 left and right at the portion facing the surface of the quay wall 7. In order to maintain the mutual distance of this vertical movement guide frame 15, a plurality of float guide horizontal frames 20 are provided from the upper end to the lower end. A float guide protection frame 21 having a U-shaped form is provided so as to surround the outer shape of the float 1 by connecting to this float guide horizontal frame 20. A float sliding frame 22 is provided which is positioned and connected vertically with a plurality of horizontal float guide protection frames 21. On one float 1, a float sliding plate 23 which moves up and down while being in contact with the float sliding frame 22 is provided. Further, a float vertical movement guide portion 24 is provided which has a structure such that it does not come off from the vertical movement guide frame 15 even while moving up and down. Also, a rack connection frame 25 for transmitting the vertical movement of the float 1 to the rack 2 is provided. On the other hand, the vertical movement guide frame 15 has a structure such that it does not come off while moving the float vertical movement guide portion 24 up and down.

[0046] In bad weather with strong winds, the moment load received by the float 1 may exceed the allowable value of aluminum or the like, and the float 1 may be blown off the device. Against strong winds, the U-shaped float guide protection frame 21 suppresses the lateral sway of the float 1 and reduces the moment, preventing destruction. When the wind speed is low, power generation can also be maintained by the float sliding plate 23 and the float sliding frame 22 moving up and down while being in contact.

[0047] In FIG. 6, the vertical movement guide frame 15 of the float guide 9 is a grooved frame material provided with grooves 26 from two sides to four sides of a quadrilateral cross-section. The vertical movement guide channel 16 covers the outer surface of the grooved frame material which is the float guide 9. A plurality of slide screws 27 which slide in the groove 26 are inserted into the groove 26 at positions corresponding to the groove 26 of the grooved frame material. On its central surface, both sides of the rack 2 are sandwiched and fixed integrally by two rack L-shaped channels 28.

[0048] According to the above invention, the rack 2 is integrally fixed to the vertical movement guide channel 16. The vertical movement guide channel 16 is a grooved frame material of the vertical movement guide frame 15. By inserting the slide screw 27 into the groove 26, stable vertical movement can be achieved while preventing detachment. This structure is simple and can be industrially produced, and can be realized at a low cost.

Industrial Applicability

[0049] The wave power generation device of the present invention can be used as a power generation device when installed on a quay wall, a breakwater, etc. and used for power generation in a place where commercial power is not discharged.

Explanation of Reference Numerals

[0050] 1 Float 2 Rack 3 Pinion 4 Speed-increasing mechanism 5 Generator 6 Device main body 7 Quay wall 8 Installation and fixing frame 9 Float guide 10 Device holding part 11 Rotation shaft 12 Device holding part C-channel 13 Vertical position holding channel 14 Fall prevention part 15 Vertical movement guide frame 16 Vertical movement guide channel 17 Connection parts 18 Device main body guide channel 19 Device main body installation frame 20 Float guide horizontal frame 21 Float guide protection frame 22 Float sliding frame 23 Float sliding plate 24 Float vertical movement guide part 25 Rack connection frame 26 Groove 27 Slide screw 28 Rack L-channel Wave power generation devices 50a and 50b

Claims

1. A wave power generation device comprising: a float that floats on the sea surface and moves up and down due to waves; two racks that are connected to the float and move up and down; two pinions that engage with the two racks in two sets and transmit in the same rotation direction during ascent and descent; a speed increasing mechanism that increases the rotational speed of the two pinions; a generator that generates electricity in the same rotation direction by the speed increasing mechanism; a device body that houses the pinions, the speed increasing mechanism, and the generator; an installation and fixing frame that serves to suspend and fix during installation; a float guide that houses the device body, the float, and the rack, guides the up and down movement of the rack connected to the float, and transmits it to the device body; and a device holding part that is installed on a quay wall or the like and suspends and fixes the float guide.

2. The device body is provided with the installation and fixing frame, houses the rack, the pinion, the speed increasing mechanism, and the generator. The float guide transfers the installation and fixing frame, the device body, and the rack to the device body, houses the float, guides its up and down movement, and transmits it to the device body. The device holding part suspends and fixes the device body. The wave power generation device according to Claim 1.

3. The device holding part is provided with a device holding part C-shaped channel that inserts the installation and fixing frame in a horizontal position and rotates from horizontal to vertical around a rotation axis on the left and right, and a vertical position holding channel that stops the rotation of the device holding part C-shaped channel in a vertical position. After rotating the device holding part C-channel vertically, a fall prevention part is provided to fix the installation and fixing frame inserted into the device holding part C-channel so that it does not fall into the sea. The wave power generation device according to Claim 1.

4. The float guide is provided with up and down movement guide frames on the left and right with respect to the surface of the quay wall, an up and down movement guide channel that slides on the outer surface of the up and down movement guide frames, connects the float and the rack to the up and down movement guide channel, and further provides a device body guide channel through which the device body slides and is inserted upward with respect to the sea surface and is held at a predetermined position. The wave power generation device according to Claim 1.

5. In the float guide, a vertical movement guide frame for guiding the vertical movement of the float left and right is provided at a portion facing the surface of the quay wall. To maintain the mutual distance of this vertical movement guide frame, a plurality of float guide horizontal frames are provided from the upper end to the lower end. A float guide protection frame is provided which is connected to this float guide horizontal frame and forms a U-shape so as to surround the outer shape of the float. A float sliding frame is provided which is positioned and connected in the vertical direction to a plurality of horizontal float guide protection frames. A float sliding plate is provided on one float which moves up and down while being in contact with the float sliding frame. Further, a float vertical movement guide portion is provided which has a structure such that it does not become disengaged from the vertical movement guide frame even while moving up and down. Also, a rack connection frame for transmitting the vertical movement of the float to the rack is provided. On the other hand, in the vertical movement guide frame, the vertical movement guide portion described in claim 2 is structured such that it does not become disengaged while moving the vertical movement guide portion up and down.

6. In the float guide, the vertical movement guide frame is a grooved frame material provided with grooves on two sides to four sides of a four-sided cross-section. The vertical movement channel covers the outer surface of this grooved frame material. A plurality of slide screws that slide in grooves are inserted into grooves corresponding to the grooves of the grooved frame material. On its central surface, both sides of the rack are sandwiched and fixed integrally by two L-shaped channels for the rack. The wave power generation device according to claim 1.

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