Hydroelectric power generation system

Abstract

To provide a power generation system capable of making a dynamo provided on a bicycle generate power without pedaling.SOLUTION: A hydraulic power generation system S is a hydraulic power generation system of a bicycle 1 having a plurality of spokes provided on a wheel 10 and a dynamo adjacent to the wheel 10 and generating power by rotation of the wheel 10, and includes a blade 4 and a second stand 3. The blade 4 includes a holding portion having a substantially C-shaped cross section and a plurality of plate members. The holding portion has a hollow portion extending in the longitudinal direction and in which the spoke is disposed, and a slit continuous with the hollow portion, extending in the longitudinal direction, and through which the spoke is passed. The plate member extends radially outward from the longitudinal direction of the holding portion. The second stand 3 exposes the upper half of the wheel 10 on which the blade 4 is arranged from the water surface, and separates the wheel 10 from the bottom so that the blade 4 on the lower side of the wheel 10 is at a height to receive the resistance of the water.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a power generation system using a bicycle. [Background technology]

[0002] Traditionally, bicycles have been equipped with a dynamo (generator) mounted on the front wheel, which generates electricity to power the front light. Dynamos are broadly divided into rim dynamos and hub dynamos. Rim dynamos are a long-standing power generating device consisting of a main body and an axle extending from the main body. This axle contacts the side of the bicycle's front wheel rim or tire and rotates as the bicycle moves. Rim dynamos generate electricity through this rotational motion. Unlike these traditional rim dynamos, rim dynamos that utilize eddy current have recently been released. Hub dynamos, on the other hand, are generators built into the front wheel axle (hub). Like rim dynamos, hub dynamos generate electricity by rotating the hub while the bicycle is moving. Hub dynamos generate electricity more efficiently because they have less resistance than contact-type rim dynamos.

[0003] Devices that utilize the power generated by such bicycle dynamos have been developed. For example, the power supply system disclosed in Patent Document 1 includes a charging module electrically connected to the dynamo, and supplies power to a mobile phone or storage battery via a USB connector. This power supply system effectively utilizes the power generated by the bicycle dynamo. Furthermore, such a power supply system can also be effectively used as a temporary power supply in the event of a power outage due to a disaster.

[0004] The power supply system disclosed in Patent Document 1 generates electricity while the vehicle is moving, so it cannot generate electricity unless the pedals are pedaled. Therefore, although it can be effectively used as a short-term power generation system in the event of a power outage during a disaster, if the power outage lasts for a long period of time, it is insufficient as a power source until the power is restored. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3189067 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a power generation system that can make a dynamo mounted on a bicycle generate electricity without the need for pedaling. [Means for solving the problem]

[0007] In order to solve the above problems, the hydroelectric power generation system according to the present invention comprises: A bicycle hydroelectric power generation system having a plurality of spokes attached to a wheel and a dynamo adjacent to the wheel for generating electricity by the rotation of the wheel, a blade having a holding portion with a generally C-shaped cross section, the holding portion having a hollow portion extending in the longitudinal direction and in which the spokes are disposed, and slits continuing into the hollow portion and extending in the longitudinal direction and through which the spokes are passed, and a plurality of plate members extending radially outward from the longitudinal direction of the holding portion; and a stand that exposes the upper half of the wheel on which the blade is arranged from the water surface and raises the blade below the wheel to a height that receives water resistance.

[0008] In order to solve the above problems, the hydroelectric power generation blade according to the present invention comprises: A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, a retaining portion having a generally C-shaped cross section, the retaining portion having a hollow portion extending in the longitudinal direction and in which the spokes are disposed, and a slit continuing from the hollow portion and extending in the longitudinal direction; and a plurality of first plate members extending radially outward from the side portions of the retaining portion in the longitudinal direction; A fixed portion; The wheel is provided with two second plate members each extending outward from the longitudinal ends of the slit, the inner surfaces of which form guide sections that guide the spokes into the hollow section, and second plate members that are fixed by fixing sections when the two second plate members are stacked on top of each other.

[0009] In order to solve the above problems, the hydroelectric power generation blade according to the present invention comprises: A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, two third plate members; a fixing portion, Both or either one of the two third plate members has a groove extending in the longitudinal direction at the center in the short side direction, The two third plate members are overlapped with each other and fixed by the fixing parts with the spokes placed in the grooves, so that they are held by the spokes, and the parts extending outward from the spokes form the blade parts.

[0010] The hydroelectric power generation blade preferably has: The fixing portion is a hook-and-loop fastener constituted by a male hook-and-loop fastener provided on the inner surface of one of the second plate members and a female hook-and-loop fastener provided on the inner surface of the other second plate member.

[0011] The hydroelectric power generation blade preferably has: The fixing portion is a spring member, The spring member biases the guide portion of the second plate member to close.

[0012] In order to solve the above problems, the hydroelectric power generation blade according to the present invention comprises: A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, a holding portion having a generally C-shaped cross section, the holding portion having a cavity portion extending in the longitudinal direction and a slit continuing from the cavity portion and extending in the longitudinal direction; a plurality of first plate members extending radially from the longitudinal direction of the holding portion; a ring spring; The two ends of the ring spring contact the first plate member or retainer and bias the slit closed.

[0013] In order to solve the above problems, the hydroelectric power generation blade according to the present invention comprises: A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, a plurality of first plate members extending radially outward from a central portion; spokes are arranged at the base ends of two opposing first plate members, and then rubber bands are fastened to the first plate members and then straddle the spokes and fastened to another first plate member, thereby fixing the hydroelectric power generation blades to the spokes; It does not have any cavities in which the spokes are placed.

[0014] In order to solve the above problem, the stand according to the present invention comprises: A stand for use in a hydroelectric power generation system for a bicycle having a plurality of spokes attached to a wheel and a dynamo adjacent to the wheel for generating electricity by rotation of the wheel, The hydroelectric power generation system includes a hydroelectric power generation blade having a plurality of first plate members connected to each spoke and extending radially outward from the spokes; The stand is two first plates each having a locking portion that is locked to the wheel and that are erected on the left and right sides of the wheel, respectively; two second plates pivotally connected to the front ends of the first plates; and a fixing means for fixing the second plate at a desired angle; The upper half of the wheel on which the hydroelectric power generation blades are arranged is exposed above the water surface, and the hydroelectric power generation blades below the wheel are at a height where they are subjected to water resistance, and water is guided to the wheel by two second plates and two first plates.

[0015] In order to solve the above problems, a hydroelectric power generation method according to the present invention includes: A hydroelectric power generation method for a bicycle having a plurality of spokes attached to a wheel and a dynamo adjacent to the wheel for generating electricity by the rotation of the wheel, comprising: a hydroelectric power generation blade having a holding portion with a generally C-shaped cross section, the holding portion having a hollow portion extending in the longitudinal direction and a slit continuing into the hollow portion and extending in the longitudinal direction, and a plurality of first plate members extending radially from the longitudinal direction of the holding portion, the hydroelectric power generation blade being held on each spoke of a bicycle; Place your bicycle where the water flows, The stand exposes the upper half of the wheel on which the hydroelectric power generation blades are arranged from the water surface, and the hydroelectric power generation blades below the wheel are subjected to water resistance. [Effects of the Invention]

[0016] The hydroelectric power generation system according to the present invention can use hydraulic power to make a dynamo mounted on a bicycle generate electricity without the need to pedal. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic side view showing a hydroelectric power generation system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic perspective view showing the blade shown in FIG. 1. [Figure 3] 1 is a schematic cross-sectional view showing several examples of blades. [Figure 4] FIG. 1 is a schematic perspective view showing blades placed on spokes. [Figure 5] FIG. 1 is a schematic side view showing blades positioned on each spoke. [Figure 6]1 is a schematic side view showing a hydroelectric power generation system installed in a waterway. [Figure 7] FIG. 10 is a schematic side view showing another example of the arrangement of the front wheels. [Figure 8] FIG. 10 is a schematic cross-sectional view showing a modified example of the blade. [Figure 9] FIG. 10 is a schematic cross-sectional view showing yet another modified example of the blade. [Figure 10] FIG. 10 is a schematic perspective view showing yet another modified example of the blade. [Figure 11] FIG. 10 is a schematic diagram showing yet another modified example of the blade. [Figure 12] FIG. 10 is a perspective view showing a modified example of the second stand. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of a hydroelectric power generation system and a hydroelectric power generation blade (hereinafter simply referred to as "blade") used in the system of the present invention will be described with reference to the accompanying drawings. In the drawings, the X axis indicates the front-rear direction, the Y axis indicates the left-right direction, and the Z axis indicates the up-down direction.

[0019] FIG. 1 is a schematic side view showing a hydroelectric power generation system S according to this embodiment. As shown in FIG. 1, the hydroelectric power generation system S includes a bicycle 1, a plurality of blades 4, a first stand 2, and a second stand 3. The second stand 3 corresponds to the "stand" of the present invention. The hydroelectric power generation system S is configured to function as a power generation system using a so-called undershot turbine, but as will be explained later, it can also be used as a power generation system using a breastshot turbine.

[0020] <Bicycle> The bicycle 1 is a conventional bicycle 1, and includes a front wheel 10, a rear wheel 11, a saddle 12, left and right pedals 13, a handlebar 14, and a dynamo (not shown).

[0021] The front wheel 10 has a hub 101, and a dynamo (hub 101 dynamo) is disposed on the hub 101. The dynamo is configured to generate electricity when the front wheel 10 rotates. In this embodiment, the dynamo is a hub 101 dynamo, but this is merely an example and it may also be a rim dynamo disposed on the rim. In this case, it is preferable that the rim dynamo is configured to be able to generate electricity without contacting the rim so that power generation efficiency does not decrease even if the rim is wet. Note that the dynamo may be any dynamo that generates electricity through the rotation of the front wheel 10, and is not limited to a hub dynamo or a rim dynamo.

[0022] In this way, bicycle 1 according to this embodiment only needs to be equipped with a dynamo that generates electricity when the wheels rotate, and no special modifications are required for power generation. Also, bicycle 1 is configured to generate electricity through the rotation of front wheel 10, but it may also be configured with a dynamo that generates electricity through the rotation of rear wheel 11, for example.

[0023] <Blade> FIG. 2 is a schematic perspective view showing the blades 4 shown in FIG. 1. As shown in FIG. 2, each blade 4 includes a holding portion 40, a first plate member 41, a second plate member 42, and a fixing portion (not shown). In this embodiment, the number of blades 4 is 36, but this is merely an example and is not limited to this. For example, the number of blades 4 may be 6 to 12. The holding portion 40, the first plate member 41, and the second plate member 42 may be made of, for example, plastic or a rust-resistant metal such as aluminum or stainless steel. Furthermore, although the holding portion 40, the first plate member 41, and the second plate member 42 are integrally formed, this is merely an example and they may be formed separately.

[0024] The retaining portion 40 has a slit 40b formed in a cylinder, and is formed with a generally C-shaped cross section. The longitudinal length of the retaining portion 40 is configured to be shorter than the length of the spokes 102. The spokes 102 pass through the slit 40b, and the hollow portion 40a accommodates the spokes 102. The slit 40b of the retaining portion 40 is configured to be able to contract or close as the retaining portion 40 flexes. This allows the retaining portion 40 to hold the blade 4 to the spoke 102.

[0025] As shown in Figures 2 and 3A, the first plate members 41 extend radially outward from the longitudinal direction of the holding part 40. In this embodiment, the first plate members 41 are made up of three pieces, but this is merely an example and is not limiting. For example, the first plate members 41 may be made up of four or more pieces, as shown in Figures 3B to 3D.

[0026] The length of the first plate member 41 in the short direction is configured to be a length that does not contact the front fork, mudguard parts, etc. of the bicycle 1 when the front wheel 10 rotates. The length of the first plate member 41 in the short direction does not have to be uniform along the longitudinal direction. For example, the length of the first plate member 41 in the short direction may be shorter the closer it is to the hub 101 of the front wheel 10, and longer the closer it is to the tire of the front wheel 10. Furthermore, the length of the first plate member 41 in the longitudinal direction may be, for example, more than one-fifth and less than one-half the length of the spokes 102.

[0027] 2, the two second plate members 42 extend outward from the longitudinal ends of the slits 40b, and the inner surfaces of the two second plate members 42 form guide portions 42a that guide the spokes 102 into the hollow portions 40a.

[0028] When the spokes 102 are passed through the guide portions 42a to the holding portions 40, the two second plate members 42 are fixed by the fixing portions in an overlapping state as shown in FIG.

[0029] The fixing portion is formed, for example, by a hook-and-loop fastener, a screw, a clip, or a rubber band 47. When the fixing portion is formed by a hook-and-loop fastener, it is formed by a male hook-and-loop fastener provided on the inner surface of one of the second plate members 42 and a female hook-and-loop fastener provided on the inner surface of the other second plate member. In this case, the size and number of the male hook-and-loop fastener and the female hook-and-loop fastener are not particularly limited.

[0030] When the fixing portion is formed by a plurality of screws, the two second plate members 42 have a plurality of screw holes and are fixed by the plurality of screws while overlapping each other. When the fixing portion is formed by clips, the two second plate members 42 are fixed by one or more clips while overlapping each other. When the fixing portion is formed by rubber bands 47, the two second plate members 42 are fixed by wrapping one or more rubber bands 47 around them while overlapping each other.

[0031] 5 shows that the blades 4 are held on all of the spokes 102. As described above, the number of blades 4 may be, for example, 6 to 12, and it is not necessary for the blades 4 to be disposed on all of the spokes 102.

[0032] <Stand> As shown in Figure 6, the first stand 2 and the second stand 3 are respectively attached to the hubs 101 of the front wheel 10 and the rear wheel 11 of the bicycle 1, and secure the bicycle 1 in an upright position in a location where water flows. The location where water flows may be, for example, a waterway or a river. The second stand 3 exposes the upper half of the front wheel 10 above the water surface and separates the front wheel 10 from the bottom so that the blade 4 below the front wheel 10 is at a height where it receives water resistance. This allows the blade 4 to rotate the front wheel 10 in response to the flow of water.

[0033] 7, the second stand 3 can be configured such that the front wheels 10 are installed at a place where water falls, such as a step or a weir in a river, so that the falling water can rotate the front wheels 10 more efficiently. In this way, the hydroelectric power generation system S can function as both an undershot turbine and a breastshot turbine.

[0034] As described above, the hydroelectric power generation system S can generate electricity from the dynamo by rotating the front wheels 10 with the flow of water. Therefore, the hydroelectric power generation system S can be effectively used for a long time as a temporary power source even in the event of a power outage due to a disaster.

[0035] The hydroelectric power generation system S and the blades 4 according to one embodiment of the present invention have been described above, but the present invention is not limited to the above embodiment. For example, the present invention may be implemented by the following modifications, or by combining the following modifications as appropriate.

[0036] <Modification> FIG. 8 is a schematic cross-sectional view showing a modified example of the blade 4. As shown in FIG. 8, the blade 4 may include, for example, two third plate members 43 instead of two second plate members 42. Both or either of the third plate members 43 (both in FIG. 8) have a longitudinally extending groove 43a at the center in the lateral direction. The two third plate members 43 are then overlapped and fixed by fasteners with the spokes 102 positioned in the grooves 43a, thereby being held by the spokes 102, and both side portions extending outward from the spokes 102 form blade portions. In this case, as shown in FIG. 8, the blade 4 may further include a first hinge 44 disposed at the end of the third plate member 43 and enabling the two third members to be opened and closed. Furthermore, as shown in FIG. 8, the blade 4 may further include a groove 43a, i.e., a first plate member 41 extending outward from the center of the blade 4.

[0037] FIG. 9 is a schematic cross-sectional view showing another modified example of the blade 4. The fixing portion may be, for example, a spring member, or may be a ring spring 45 as shown in FIGS. 9A and 9B. In this case, the blade 4 does not need to include a second member, and the first plate member 41 may have a hole through which the ring spring 45 passes. As shown in FIGS. 9A and 9B, the support portion of the blade 4 may be divided into two parts connected by a second hinge 46, and may be biased toward the slit 40b by the biasing force of the ring spring 45, like a clothespin. Both ends of the ring spring 45 may be configured to contact the first plate member 41 as shown in FIG. 9A, or may be configured to contact the support member as shown in FIG. 9B.

[0038] The fixed portion may be formed of a helical spring instead of the ring spring 45. In this case, the helical spring is fixed to the second hinge 46 and biases the slit 40b to close. Furthermore, as long as the fixed portion is formed of a spring member and the spring member biases the slit 40b to close, the spring member is not limited to the ring spring 45 or the helical spring.

[0039] Furthermore, when the fixing portion is configured as a spring member, the blade 4 may be configured to include both the second plate member 42 and the spring member. When the spring member is configured as a ring spring 45, both ends of the ring spring 45 are configured to contact the outer surface of the second plate member 42 and bias the guide portion 42a to close.

[0040] FIG. 10 is a schematic perspective view showing yet another modified example of the blade 4. As shown in FIGS. 10A and 10B, the blade 4 may be composed of, for example, multiple first plate members 41 extending radially outward from the center and rubber bands 47. In this case, the blade 4 is fixed to the spokes 102 by (1) arranging spokes 102 at the base ends 41a of opposing first plate members 41 as shown in FIG. 10C, and (2) engaging rubber bands 47 with the first plate members 41 and straddling the spokes 102, thereby engaging rubber bands 47 with another first plate member 41 as shown in FIG. 10D. In this case, the blade 4 does not have a hollow portion 40a. It is also preferable that the ends of the first plate members 41 be rounded to prevent the rubber bands 47 from being cut.

[0041] 11A and 11B are schematic diagrams showing yet another modified example of the blade 4, with FIG. 11A being a front view and FIG. 11B being a perspective view. Like the blade 4 shown in FIG. 10, the blade 4 shown in FIG. 11 also has a plurality of first plate members 41 extending radially outward from the center. And, like the blade 4 shown in FIG. 10, this blade 4 is also fixed to the spokes 102 with rubber bands 47. The blade 4 further has a member with a V-shaped cross section at the tip of the lower first plate member 41 in FIGS. 11A and 11B. However, this is simply a member attached to the first plate member 41, and a blade 4 with such a shape also falls within the scope of the present invention.

[0042] FIG. 12 is a perspective view showing a modified example of the second stand 3. As shown in FIG. 12, the second stand 3 may have, for example, two first plates 30, two second plates 31, two third hinges 32, a bottom plate 33, and a fixing means (not shown). The two first plates 30 have locking portions 30a that are locked to wheels and are arranged on the left and right. The two second plates 31 are rotatably connected to the front ends of the respective first plates 30 via the third hinges 32. The bottom plate 33 is fixed to the lower ends of the two first plates 30. The fixing means is a set screw, a tension rod, or the like, and is configured to fix the second plate 31 at a desired angle. The second stand 3 positions the front wheel 10 (rear wheel 11) between the two first plates 30, exposes the upper half of the front wheel 10 (rear wheel 11) above the water surface, and is at a height where the blade 4 below the front wheel 10 (rear wheel 11) receives water resistance. Furthermore, the second stand 3 can adjust the amount of water flowing between the two second plates 31 and the two first plates 30 by opening the two second plates 31 to a desired angle. [Explanation of symbols]

[0043] S Hydroelectric Power Generation System 1. Bicycle 10 Front wheels 101 Hub 102 spokes 11 Rear wheel 12 Saddle 13 Pedals 14 Handle 2. First Stand 3. Second Stand 30 Plate 1 30a Locking part 31 Second Plate 32 Third hinge 33 Bottom plate 4 blades 40 Holding part 40a Cavity 40b slit 41 1st plate member 41a proximal end 42 Second plate member 42a Guide part 43 Third plate member 43a Groove 44 First hinge 45 Ring spring 46 Second hinge 47 Rubber Band

Claims

1. A hydroelectric power generation system for a bicycle having a plurality of spokes attached to a wheel and a dynamo adjacent to the wheel for generating electricity by rotation of the wheel, a blade having a holding portion with a generally C-shaped cross section, the holding portion having a hollow portion extending in a longitudinal direction and in which the spokes are disposed, and a slit continuing to the hollow portion and extending in the longitudinal direction and through which the spokes are passed, and a plurality of plate members extending radially outward from the longitudinal direction of the holding portion; a stand that exposes the upper half of the wheel on which the blades are arranged above the water surface and that sets the blades below the wheel at a height that receives water resistance.

2. A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, a holding portion having a generally C-shaped cross section, the holding portion having a cavity portion extending in a longitudinal direction and in which the spokes are disposed, and a slit continuing from the cavity portion and extending in the longitudinal direction; a plurality of first plate members extending radially outward from longitudinal side portions of the holding portion; A fixed portion; A hydroelectric power generation blade comprising: two second plate members extending outward from the longitudinal ends of the slit, the inner surfaces of the two second plate members forming guide portions that guide the spokes into the hollow portion, and the second plate members fixed by the fixing portions when the two second plate members are stacked on top of each other.

3. A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, two third plate members; a fixing portion, Both or either one of the two third plate members has a groove extending in the longitudinal direction at the center in the short side direction, A hydroelectric power generation blade in which the two third plate members are held by the spokes by being overlapped with each other and fixed by the fixing portions with the spokes placed in the grooves, and the portions extending outward from the spokes form the blade portion.

4. 3. The hydroelectric power generation blade according to claim 2, wherein the fixing portion is a hook-and-loop fastener constituted by a male hook-and-loop fastener provided on the inner surface of one of the second plate members and a female hook-and-loop fastener provided on the inner surface of the other of the second plate members.

5. The fixing portion is a spring member, The hydroelectric power generating blade according to claim 2 , wherein the spring member biases the guide portion of the second plate member so as to close the guide portion.

6. A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, a holding portion having a generally C-shaped cross section, the holding portion having a cavity portion extending in a longitudinal direction and a slit continuing from the cavity portion and extending in the longitudinal direction; a plurality of first plate members extending radially from the longitudinal direction of the holding portion; a ring spring; The two ends of the ring spring contact the first plate member or the retaining portion and urge the slit to close.

7. A hydroelectric power generating blade used for hydroelectric power generation of a bicycle having a wheel, a plurality of spokes provided on the wheel, and a dynamo adjacent to the wheel that generates electricity by rotation of the wheel, a plurality of first plate members extending radially outward from a central portion; and a rubber band that is engaged with the first plate members after the spokes are placed at the base ends of the two opposing first plate members and then straddles the spokes and is engaged with another first plate member, thereby fixing the hydroelectric power generation blade to the spokes, A hydroelectric power generating blade that does not have a cavity in which the spokes are arranged.

8. A stand for use in a hydroelectric power generation system for a bicycle having a plurality of spokes attached to a wheel and a dynamo adjacent to the wheel for generating electricity by rotation of the wheel, The hydroelectric power generation system includes a hydroelectric power generation blade having a plurality of first plate members connected to each of the spokes and extending radially outward from the spokes; The stand is two first plates each having a locking portion that is locked to the wheel and that are erected on the left and right sides of the wheel, respectively; two second plates pivotally connected to the front ends of the first plates; and a fixing means for fixing the second plate at a desired angle, A stand that exposes the upper half of the wheel on which the hydroelectric power generation blades are arranged above the water surface, and is at a height where the hydroelectric power generation blades below the wheel are subjected to water resistance, and guides water to the wheel by two of the second plates and two of the first plates.

9. 1. A hydroelectric power generation method for a bicycle having a plurality of spokes attached to a wheel and a dynamo adjacent to the wheel for generating electricity by rotation of the wheel, comprising: a hydroelectric power generation blade having a holding portion with a generally C-shaped cross section, the holding portion having a hollow portion extending in a longitudinal direction and a slit continuing into the hollow portion and extending in the longitudinal direction, and a plurality of first plate members extending radially from the longitudinal direction of the holding portion, the hydroelectric power generation blade being held on each of the spokes of the bicycle; placing the bicycle in a location where water flows; a stand for exposing an upper half of the wheel on which the hydroelectric power generation blades are arranged from the water surface, and for separating the wheel from the bottom so that the hydroelectric power generation blades below the wheel are at a height that causes them to receive water resistance.

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