Basket for wind turbine, and wind turbine

Abstract

[Problem] The present invention addresses the problem of solving the problems in the prior art, that is, of providing a basket for a wind turbine that is partially joined by surface bonding and not joined solely by bolts between structural members, and a wind turbine using same. [Solution] A basket for a wind turbine according to the present invention is a basket constituting a wind turbine, the basket comprising a top plate made of a thin plate material, a bottom plate also made of a thin plate material, and a blade plate made of a thin plate material. In an upper joint section, the blade plate, which is arranged approximately perpendicular to the top plate, is both bolt-joined and adhesively bonded to the top plate via an angled material. In a lower joint section, the blade plate, which is arranged approximately perpendicular to the bottom plate, is both bolt-joined and adhesively bonded to the bottom plate via an angled material.

Description

Windmill basket and windmill

[0001] The present invention relates to a small wind turbine that can be installed on a building or the like, and more specifically to a wind turbine basket that is mainly made of thin plate material, and a wind turbine that uses the same.

[0002] Although electricity consumption in Japan temporarily began to decline due to the impact of the global financial crisis in 2008, it has been increasing continuously since the oil shock of 1973, expanding 2.6 times between fiscal 1973 and fiscal 2007. The reasons for this include the spread of so-called home appliances such as air conditioners and electric carpets as living standards improved, and the spread of office automation (OA) equipment and communication devices as the number of office buildings increased.

[0003] Until now, this enormous demand for electricity has been primarily met by power generation using so-called fossil fuels such as oil, coal, and natural gas. However, in recent years, attention has been focused on the depletion of fossil fuels and environmental issues associated with global warming, leading to a gradual change in power generation methods. As a result, according to statistics from the Federation of Electric Power Companies of Japan, while oil accounted for approximately 46% of annual electricity generation around 1980, this proportion had fallen to 9% by 2010. Instead, nuclear power generation has increased, accounting for just over 25% of the total (2010). Nuclear power generation has made a significant contribution to Japan's electricity demand because it significantly reduces greenhouse gas emissions compared to conventional power generation methods and can provide electricity at low cost.

[0004] Furthermore, power generation methods using renewable energy sources have also come to be adopted, as they can reduce greenhouse gas emissions. Renewable energy sources are literally renewable energy sources such as wind, solar, geothermal, small and medium-sized hydroelectric power, and woody biomass, and are expected to be a promising low-carbon energy source because they reduce greenhouse gas emissions and can be produced domestically.

[0005] Among renewable energy sources, wind power generation has the advantage of being particularly efficient at converting electrical energy. Generally, the conversion efficiency of solar power generation is approximately 20%, woody biomass power generation is approximately 20%, and geothermal power generation is 10-20%, while wind power generation is said to be 20-40%, making it more efficient at converting energy into electricity than other power generation methods. Another advantage of wind power generation is that, unlike solar power generation, it can generate electricity day and night. Due to these characteristics, wind power generation is already widely used as a major power generation method in Europe, and in Japan, as part of its "energy mix" initiative, it aims to account for 1.7% of the power generation mix by 2030.

[0006] Wind power generation can be broadly divided into onshore and offshore wind power generation depending on the location of installation. Onshore wind power generation is easier to install than offshore wind power generation, and therefore onshore wind power generation was previously the mainstream, but in recent years, offshore wind power generation has also been actively promoted. Both onshore and offshore wind power generation typically involve the installation of relatively large power generation facilities consisting of towers, nacelles, blades, etc. However, large-scale power generation facilities installed on land have been criticized for noise problems caused by extremely low and low frequencies, and there are also issues such as the severe damage that could occur if the tower were to fall over, the difficulty of securing land, and the enormous construction costs involved in the first place.

[0007] Meanwhile, recently, buildings known as "Zeb (Net Zero Energy Building)" have been attracting attention, and efforts are accelerating to realize buildings that achieve a comfortable indoor environment while achieving a zero balance of primary energy consumption within the building. Accordingly, small-scale wind power generation equipment that can be installed on the rooftops of office buildings and apartment buildings, for example, has come into use. In other words, small-scale wind power generation equipment installed in office buildings and the like is used to contribute to the energy balance. Various technologies related to small-scale wind power generation equipment have also been proposed. For example, Patent Document 1 proposes a wind turbine that uses blades with a distinctive shape.

[0008] Japanese Patent Application Laid-Open No. 2005-16405

[0009] In wind power generation, in order to generate a large amount of power, it is important to rotate the wind turbine as efficiently as possible, and therefore it is desirable to make the components that make up the wind turbine as light as possible. As shown in the wind turbine disclosed in Patent Document 1, the components that make up the wind turbine are often thin-walled, as in the case of the wind turbine disclosed in Patent Document 1, which uses thin-walled (1 mm) aluminum lumber. Therefore, it is difficult to use welding to join the components, and bolt and nut joining, as in Patent Document 1, is the mainstream method.

[0010] However, bolted joints cannot be made into so-called surface joints, but are joined at each bolt point. Therefore, stress inevitably concentrates at the bolt location, and the only way to reduce stress concentration is to increase the number of bolts. However, increasing the number of bolts increases the weight accordingly, which means that it is not a desirable measure for reducing the weight of wind turbines.

[0011] The object of the present invention is to solve the problems of the prior art, that is, to provide a wind turbine basket in which the components are not joined together only by bolts, and in which the components are joined partially by surface joints, and a wind turbine using the same.

[0012] The present invention was made based on an unprecedented idea that components are joined together using "angle members" such as angle irons, and that the components are joined together using a composite joint consisting of bolted and welded joints.

[0013] The wind turbine basket of the present invention is a basket that constitutes a wind turbine and includes a top plate made of a thin plate material, a bottom plate also made of a thin plate material, and blades also made of a thin plate material. The bottom plate is disposed approximately parallel (including parallel) to the top plate, and the blades are disposed between the top and bottom plates. At the upper joint, the blades, which are disposed approximately perpendicular (including perpendicular) to the top plate, are joined to the top plate by angled members. Similarly, at the lower joint, the blades, which are disposed approximately perpendicular (including perpendicular) to the bottom plate, are joined to the bottom plate by angled members. The angled members are members having a first abutment surface and a second abutment surface that is approximately perpendicular (including perpendicular) to the first abutment surface. At the upper joint, the first abutment surface of the angled member abuts against the top plate and the second abutment surface abuts against the blades, and the first abutment surface and the top plate are joined by bolts and adhesive, and the second abutment surface and the blades are joined by bolts and adhesive. Similarly, at the lower joint, the first abutment surface of the angled member abuts against the bottom plate and the second abutment surface abuts against the slat, and then the first abutment surface and the bottom plate are bolted and adhesively joined, and the second abutment surface and the slat are bolted and adhesively joined.

[0014] In the wind turbine basket of the present invention, the cross-sectional shape of the angled members that come into contact with the curved portions of the blades may be curved to match the blades.

[0015] The wind turbine basket of the present invention may have a plurality of angled members arranged at intervals between the upper and lower joints. In this case, the blades are partially straight and partially curved in plan view. The length of the angled members that come into contact with the curved portions of the blades is shorter than the length of the angled members that come into contact with the straight portions of the blades.

[0016] The wind turbine basket of the present invention may further include an intermediate plate made of a thin plate material, an upper intermediate joint, and a lower intermediate joint. In this case, the blades are composed of an upper blade plate and a lower blade plate, and the upper blade plate is joined to the top plate at the upper joint, and the lower blade plate is joined to the bottom plate at the lower joint. At the upper intermediate joint, the upper blade plate, which is arranged substantially perpendicular (including perpendicular) to the intermediate plate, and the intermediate plate are joined by an angle member. At the lower intermediate joint, the lower blade plate, which is arranged substantially perpendicular (including perpendicular) to the intermediate plate, and the intermediate plate are joined by an angle member. At the upper intermediate joint, the first abutment surface of the angle member abuts against the intermediate plate and the second abutment surface abuts against the upper blade plate, and the first abutment surface and the intermediate plate are bolted and adhesively joined, and the second abutment surface and the upper blade plate are bolted and adhesively joined. Similarly, at the lower intermediate joint, the first abutment surface of the angled member abuts against the intermediate plate and the second abutment surface abuts against the lower slat, and then the first abutment surface and the intermediate plate are bolted and adhesively joined, and the second abutment surface and the lower slat are bolted and adhesively joined.

[0017] In the wind turbine basket of the present invention, the upper and lower joints may be joined by structural adhesive.

[0018] The wind turbine of the present invention includes the wind turbine basket of the present invention, a top plate, and a shaft arranged substantially perpendicular (including perpendicular) to the top plate. The shaft and the top plate are joined by bolts and adhesive at the upper end of the shaft, and the shaft and the bottom plate are joined by bolts and adhesive at the lower end of the shaft. When the blades are exposed to wind, the shaft rotates around its axis together with the wind turbine basket.

[0019] The wind turbine basket and wind turbine of the present invention have the following advantages: (1) In addition to bolt connections between components, adhesive connections are made via angled bars, which allows for stronger connections than connections made with bolts alone. (2) Because connections are made using angled bars and adhesive, the joints are surface joints, which reduces stress concentration in the bolted areas. (3) Because the connections are strong, it is possible to reduce the number of joints, resulting in a reduction in overall weight.

[0020] FIG. 1 is a side view of a wind turbine according to the present invention. FIG. 2 is a perspective view of a wind turbine basket according to the present invention. (a) is a perspective view schematically showing a blade plate, and (b) is a plan view schematically showing a blade plate. FIG. 3 is a plan view of the top plate, bottom plate, and intermediate plate as viewed from above. (a) is a partial perspective view showing an "upper joint" joining the top plate and blade plate, and (b) is a partial perspective view showing a "lower joint" joining the bottom plate and blade plate. (a) is a perspective view schematically showing a angle member with a relatively short width, and (b) is a perspective view schematically showing a angle member with a relatively long width. FIG. 4 is a partial cross-sectional view schematically showing a lower joint where the bottom plate and blade plate are joined via an angle member. FIG. 5 is a partial perspective view showing an "intermediate joint" joining the upper and lower blade plates. FIG. 6 is a perspective view showing a shaft arranged between two lower blade plates joined to the bottom plate.

[0021] The present invention relates to a "wind turbine" for wind power generation and a "wind turbine basket" that constitutes the wind turbine. An example of an embodiment of the wind turbine basket and wind turbine of the present invention will be described below with reference to the drawings.

[0022] 1. Overall Overview Figure 1 is a side view showing a wind turbine 100 of the present invention. As shown in this figure, the wind turbine 100 of the present invention is configured to include a wind turbine basket 200 and a shaft 300 of the present invention, and can also be configured to include a generator 400, a speed increaser, a brake, etc. The wind turbine 100 can also be of the Savonius type, for example, as shown in Figure 1.

[0023] The shaft 300 has a structure that rotates around its axis, and the wind turbine basket 200 is attached to this shaft 300. For example, if the wind turbine 100 is installed so that the shaft 300 is in a substantially vertical (including vertical) direction, the shaft 300 will rotate around a substantially vertical (including vertical) axis. When wind hits the shaft 300, the wind turbine basket 200 exerts a rotational force (arrow in FIG. 1) on the shaft 300, causing the shaft 300 to rotate together with the wind turbine basket 200 (arrow in FIG. 1). The rotational force of the shaft 300 is then transmitted to the generator 400, and the generator 400 begins to generate electricity.

[0024] The wind turbine 100 of the present invention can have an overall height of approximately 2 to 3 m (for example, about 2.6 m), an overall longitudinal width of 1 to 2 m (for example, about 1.0 m), and can be constructed using materials with a small unit weight and thin plate materials. In other words, the wind turbine 100 of the present invention can generate electricity while being small and lightweight.

[0025] 2. Wind Turbine Basket The wind turbine basket 200 of the present invention will now be described. The wind turbine 100 of the present invention utilizes the wind turbine basket 200 of the present invention. Therefore, the wind turbine basket 200 of the present invention will be described first, followed by the wind turbine 100 of the present invention.

[0026] FIG. 2 is a perspective view showing a wind turbine basket 200 of the present invention. As shown in this figure, the wind turbine basket 200 of the present invention is configured to include a top plate 210, a bottom plate 220, blade plates 230, an upper joint 250, and a lower joint 260, and may further include an intermediate plate 240 and an intermediate joint 270. However, the wind turbine basket 200 may be configured to include two or more blade plates 230. For example, in FIG. 2, two blade plates 230 are arranged to surround the shaft 300. The top plate 210, the bottom plate 220, and the intermediate plate 240 that make up the wind turbine basket 200 are arranged approximately parallel to each other (including parallel). Meanwhile, the blade plate 230 is arranged between the top plate 210 and the bottom plate 220 and approximately perpendicular to the top plate 210 and the bottom plate 220 (including perpendicular). For example, when the top plate 210 is positioned horizontally, the bottom plate 220 and the intermediate plate 240 are also positioned horizontally, and the blade plate 230 is positioned vertically. For convenience, unless otherwise specified, the following description will be given assuming that the top plate 210 is positioned horizontally.

[0027] The top plate 210, bottom plate 220, middle plate 240, and blade plate 230 are thin plates made of lightweight (low unit weight) materials such as CFPR (Carbon Fiber Reinforced Plastics), GFPR (Glass Fiber Reinforced Plastics), aluminum, etc. Of course, in cases where the overall weight is to be significantly reduced, plates made of other materials such as steel or titanium can be used instead of CFPR.

[0028] The blade 230 can be formed as a single unit without being divided into upper and lower parts, or can be formed by combining two or more upper and lower divided members. For example, in Fig. 2, the blade 230 is formed by two upper and lower divided blades, an upper blade 231 and a lower blade 232. In this case, an intermediate plate 240 is disposed between the upper blade 231 and the lower blade 232, and an intermediate joint 270 is preferably provided to connect the upper blade 231 and the lower blade 232. Furthermore, the blade 230 can be formed as a single unit without being divided in the width direction, or can be formed by combining two or more members divided in the width direction.

[0029] 3A and 3B are diagrams schematically illustrating the blade 230, with (a) being a perspective view and (b) being a plan view viewed from above. The blade 230 is a plate material having the same cross-sectional shape continuing vertically as shown in FIG. 3A. Also, as shown in FIG. 3B, the blade 230 can have a shape that combines straight and curved (arc) portions when viewed in plan. When the blade 230 is divided into two, upper and lower, the upper blade 231 and the lower blade 232 can also have the same shape as shown in FIG. 3. As described above, the blade 230 is a thin-walled plate material made of a lightweight material such as CFPR, and the thickness is preferably designed to be, for example, about 2.0 mm.

[0030] Figure 4 is a plan view of the top plate 210 as seen from above. As shown in this figure, the top plate 210 can have an outer shape that combines straight and curved (arc) portions when viewed from above, and has a shaft hole 211 at its center for passing the shaft 300. The bottom plate 220 and intermediate plate 240 can also have a shape as shown in Figure 4, similar to the top plate 210. As mentioned above, the top plate 210, the bottom plate 220, and the intermediate plate 240 are thin plates made of a lightweight material such as CFPR, and their thickness can be designed to be, for example, about 2.0 mm, similar to that of the blade plate 230.

[0031] As also shown in Fig. 4, two blade plates 230 are arranged to surround the shaft 300, and the upper ends of the blade plates 230 are joined to the top plate 210 and the lower ends of the blade plates 230 are joined to the bottom plate 220. Fig. 5(a) is a partial perspective view showing an "upper joint 250" that joins the top plate 210 and the blade plates 230, and Fig. 5(b) is a partial perspective view showing a "lower joint 260" that joins the bottom plate 220 and the blade plates 230. As shown in this figure, the upper joint 250 and the lower joint 260 are formed by angle members 280.

[0032] FIG. 6 is a perspective view schematically illustrating an angle member 280, where (a) shows an angle member 280 with a relatively short width L, and (b) shows an angle member 280 with a relatively long width L. As shown in this figure, the angle member 280 has a first abutment surface 281 and a second abutment surface 282, which are arranged so that the first abutment surface 281 and the second abutment surface 282 are orthogonal to each other, in other words, so that the second abutment surface 282 is approximately perpendicular (including perpendicular) to the first abutment surface 281. Furthermore, bolt holes 283 for inserting bolts are provided near the centers of the first abutment surface 281 and the second abutment surface 282, respectively. The angle member 280 can be manufactured using a lightweight material such as CFPR, like the top plate 210, bottom plate 220, and slats 230, or can be manufactured by processing (cutting) conventional angle iron.

[0033] The upper joint 250 and the lower joint 260 can use angle members 280 with a relatively short width (hereinafter referred to as "short angle members 280") as shown in Figure 6(a), or can use angle members 280 with a relatively long width (hereinafter referred to as "long angle members 280") as shown in Figure 6(b). The short angle members 280 are lighter than the long angle members 280, but the long angle members 280 make it easier to ensure a surface joint than the short angle members 280.

[0034] For example, when only short angle members 280 are used, it is preferable to space multiple angle members 280 apart to form upper joint 250 and lower joint 260. On the other hand, when only long angle members 280 are used, it is possible to space one angle member 280 apart to form upper joint 250 and lower joint 260, or it is possible to space two or more angle members 280 apart to form upper joint 250 and lower joint 260.

[0035] Alternatively, short and long angle members 280 can be used in combination. For example, in FIG. 5 , long angle members 280 are arranged on the straight portions of the slat 230, and short angle members 280 are arranged on the curved portions. By combining and arranging short and long angle members 280 in this manner, the upper joint 250 and the lower joint 260 can be formed to flexibly accommodate the complex shape of the slat 230. Of course, depending on the situation, short angle members 280 can be arranged on the straight portions and long angle members 280 can be arranged on the curved portions. Note that the angle members 280 (short angle members 280 and long angle members 280) arranged on the curved portions of the slat 230 should preferably be processed to have the same curved shape (i.e., linear) as the curved shape of the slat 230 on which they are arranged. This increases the contact surface between the angle member 280 (particularly the second contact surface 282) and the slat 230, making it easier to ensure surface contact.

[0036] FIG. 7 is a partial cross-sectional view schematically illustrating the lower joint portion 260 where the bottom plate 220 and the slats 230 are joined via the angle member 280. An example of a procedure for joining the bottom plate 220 and the slats 230 will be described below with reference to this figure. First, the second abutment surface 282 (a vertical surface in the figure) of the angle member 280 is abutted against the lower end of the outer surface of the slat 230. At this time, adhesive GL is applied to the second abutment surface 282 (or the outer surface of the slat 230), so the angle member 280 is adhesively joined to the slat 230. Then, a bolt BL is inserted into a bolt hole 283 of the second abutment surface 282, and the tip of the bolt BL is threadedly engaged with a nut NT on the inside of the slat 230 and tightened, thereby bolting the angle member 280 to the slat 230. Therefore, a small hole for inserting the bolt BL is provided at a predetermined position on the blade plate 230, and when the second abutment surface 282 is abutted against the blade plate 230, the angle-shaped material 280 is positioned after aligning the position of the bolt BL with the small hole.

[0037] When the angle member 280 is adhesively joined to the slat 230 and bolted, a first contact surface 281 (a horizontal surface in the figure) of the angle member 280 abuts against the upper surface of the bottom plate 220. At this time, adhesive GL is applied to the first contact surface 281 (or the upper surface of the bottom plate 220), so the angle member 280 is adhesively joined to the bottom plate 220. Then, a bolt BL is inserted into a bolt hole 283 in the first contact surface 281, and the tip of the bolt BL is screwed into a nut NT on the underside of the bottom plate 220 and tightened, thereby bolting the angle member 280 to the bottom plate 220. Therefore, a small hole for inserting the bolt BL is provided at a predetermined position on the bottom plate 220, and when the first contact surface 281 is to be abutted against the bottom plate 220, the angle member 280 is positioned by aligning the position of the bolt BL with the small hole. Up to this point, we have explained the procedure for joining the angle-shaped material 280 and the slats 230, but depending on the situation, it is also possible to join the angle-shaped material 280 and the bottom plate 220 first, and then join the angle-shaped material 280 and the slats 230.

[0038] The procedure for joining the top plate 210 and the blade plates 230 via the angle member 280 is generally similar to the procedure described above, but an example will be described below just to be sure. First, the second abutment surface 282 of the angle member 280 is abutted against the upper end of the outer surface of the blade plate 230. At this time, adhesive GL is applied to the second abutment surface 282 (or the outer surface of the blade plate 230), so the angle member 280 is adhesively joined to the blade plate 230. Next, a bolt BL is inserted into a bolt hole 283 in the second abutment surface 282, and the tip of the bolt BL is screwed into a nut NT on the inside of the blade plate 230 and tightened, thereby bolting the angle member 280 to the blade plate 230. Therefore, a small hole for inserting the bolt BL is provided at a predetermined position on the blade plate 230, and when the second abutment surface 282 is abutted against the blade plate 230, the angle-shaped material 280 is positioned after aligning the position of the bolt BL with the small hole.

[0039] When the angle member 280 is adhesively joined to the slat 230 and bolted, a first abutment surface 281 of the angle member 280 abuts against the underside of the top plate 210. At this time, adhesive GL is applied to the first abutment surface 281 (or the underside of the top plate 210), so the angle member 280 is adhesively joined to the top plate 210. Then, a bolt BL is inserted into a bolt hole 283 in the first abutment surface 281, and the tip of the bolt BL is screwed into a nut NT on the upper side of the top plate 210 and tightened, thereby bolting the angle member 280 to the top plate 210. Therefore, a small hole for inserting the bolt BL is provided at a predetermined position on the top plate 210, and when the first abutment surface 281 is to be abutted against the top plate 210, the angle member 280 is positioned by aligning the position of the bolt BL with the small hole. Up to this point, we have explained the procedure for joining the angle-shaped material 280 and the slats 230, but depending on the situation, it is also possible to join the angle-shaped material 280 and the top plate 210 first, and then join the angle-shaped material 280 and the slats 230.

[0040] As described above, the blade plate 230 can be formed by the upper blade plate 231 and the lower blade plate 232. In this case, it is preferable to dispose the intermediate plate 240 between the upper blade plate 231 and the lower blade plate 232 and provide an intermediate joint 270 for connecting the upper blade plate 231 and the lower blade plate 232. Figure 8 is a partial perspective view showing the "intermediate joint 270" for connecting the upper blade plate 231 and the lower blade plate 232. As shown in this figure, the intermediate joint 270 is composed of an "upper intermediate joint 271" that joins the upper blade plate 231 and the intermediate plate 240 and a "lower intermediate joint 272" that joins the lower blade plate 232 and the intermediate plate 240. That is, the upper end of the upper blade plate 231 is joined to the top plate 210 by the upper joint 250, and the lower end of the upper blade plate 231 is joined to the intermediate plate 240 by the upper intermediate joint 271. Similarly, the lower slat 232 is joined at its lower end to the bottom plate 220 by a lower joint 260 , and at its upper end to the intermediate plate 240 by a lower intermediate joint 272 .

[0041] Like the upper joint 250 and the lower joint 260, the upper intermediate joint 271 and the lower intermediate joint 272 are configured by one or more angle members 280, and it is possible to selectively use short angle members 280 or long angle members 280 as appropriate. Furthermore, the procedure for joining the upper slat 231 and the intermediate plate 240 via the angle member 280 and the procedure for joining the lower slat 232 and the intermediate plate 240 via the angle member 280 can be the same as the procedure for joining the top plate 210 and the bottom plate 220 and the procedure for joining the top plate 210 and the slat 230, which have been described so far.

[0042] The adhesive GL used in the upper joint 250, the lower joint 260, and the intermediate joint 270 (the upper intermediate joint 271 and the lower intermediate joint 272) is preferably a "structural adhesive." The structural adhesive used in the present invention will be described in detail below.

[0043] (Structural Adhesives) Structural adhesives are defined in JIS K 6800, Adhesives and Adhesion Terminology, as "reliable adhesives that can withstand heavy loads for long periods of time." Examples include acrylic adhesives, epoxy adhesives, urethane adhesives, silicone adhesives, modified silicone adhesives, and phenolic adhesives. When using curing structural adhesives, any curing type, whether one-component or two-component, may be used, including heat curing, UV curing, room temperature curing, and moisture curing, or a combination of multiple types. In particular, to avoid stress concentration at each joint (upper joint 250, lower joint 260, and intermediate joint 270) in the present invention, it is recommended that the structural adhesive contain an elastomer component. Examples of elastomers include, but are not limited to, synthetic rubber, natural rubber, liquid rubber, and styrene-based, olefin-based, urethane-based, polyester-based, polyamide-based, and PVC-based thermoplastic elastomers. These elastomers can be used alone or in combination of two or more types as long as they are compatible.

[0044] (Surface Treatment of Adherends) To enhance adhesion at each joint in the present invention, it is preferable to pre-treat the surfaces of the adherends, such as the top plate 210, bottom plate 220, intermediate plate 240, and vane plate 230. Examples of such surface treatments include, but are not limited to, mechanical treatments such as sandblasting and shot blasting, physical treatments such as ultraviolet irradiation, corona discharge, plasma treatment, and laser treatment, and chemical treatments using acids, alkalis, etc. Various conventionally known treatment techniques can also be employed. Furthermore, a primer treatment may be used to protect the surface of the adherend and enhance adhesion.

[0045] 3. Wind Turbine Next, the wind turbine 100 of the present invention will be described. The wind turbine 100 of the present invention utilizes the wind turbine basket 200 of the present invention. Therefore, we will avoid any overlapping explanation with the explanation of the wind turbine basket 200 of the present invention, and will only explain the details that are unique to the wind turbine 100 of the present invention. In other words, the details not described here are the same as those explained in "2. Wind Turbine Basket."

[0046] The wind turbine 100 of the present invention is configured to include a wind turbine basket 200 and a shaft 300, and may further include a generator 400, a speed increaser, a brake, etc. The shaft 300 is arranged vertically and rotates around the vertical axis, so that when wind strikes the wind turbine basket 200, the shaft 300 rotates together with the wind turbine basket 200. The rotational force of the shaft 300 is then transmitted to the generator 400, which begins to generate electricity.

[0047] The wind turbine 100 can be manufactured generally by the following procedure. First, two lower blade plates 232 are joined to the bottom plate 220. As already mentioned, the lower blade plates 232 and the bottom plate 220 are joined by the lower joint 260. After the lower blade plates 232 and the bottom plate 220 are joined, as shown in FIG. 9 , a shaft 300 is inserted into the shaft hole 211 of the bottom plate 220 and positioned between the two lower blade plates 232. A lower flange 320 having a diameter larger than that of the shaft hole 211 is provided at the lower end of the shaft 300, and this lower flange 320 can be used to join the shaft 300 to the bottom plate 220. Specifically, the lower surface of the bottom plate 220 and the lower flange 320 are joined with adhesive GL, and the bottom plate 220 and the lower flange 320 can be joined by sewing them together with bolts BL. In other words, the joint between the shaft 300 and the bottom plate 220 is a composite joint that combines adhesive bonding and bolt bonding, similar to the upper joint 250 and the lower joint 260. The adhesive GL used to adhesively bond the bottom plate 220 and the lower flange 320 may be the same as the adhesive GL used for the upper joint 250 and the lower joint 260.

[0048] After the shaft 300 and the bottom plate 220 are joined, the two lower blade plates 232 are joined to the intermediate plate 240. At this time, as already described, the lower blade plates 232 and the intermediate plate 240 are joined by the lower intermediate joints 272. Next, the two upper blade plates 231 are arranged above the intermediate plate 240, and these upper blade plates 231 are joined to the intermediate plate 240. At this time, as already described, the upper blade plates 231 and the intermediate plate 240 are joined by the upper intermediate joints 271.

[0049] After the upper blade plate 231 and the intermediate plate 240 are joined, the shaft 300 is inserted through the shaft hole 211 in the top plate 210, and the top plate 210 is then positioned above the two upper blade plates 231. The upper end of the shaft 300 is provided with an upper flange 310 having a diameter larger than that of the shaft hole 211. Therefore, it is preferable to fix the upper flange 310 to the upper end of the shaft 300 after inserting the shaft 300 through the shaft hole 211 in the top plate 210. When the top plate 210 is positioned above the upper blade plate 231, the two upper blade plates 231 are joined to the top plate 210. As previously mentioned, the upper joints 250 join the upper blade plate 231 to the top plate 210. After the upper blade plate 231 and the top plate 210 are joined, the shaft 300 is joined to the top plate 210 using the upper flanges 310. Specifically, the upper surface of the top plate 210 and the upper flange 310 are joined with an adhesive GL, and the top plate 210 and the upper flange 310 are sewn together with bolts BL. In other words, the joint between the shaft 300 and the top plate 210 is a composite joint that combines adhesive joining and bolt joining, just like the upper joint 250 and the lower joint 260. The adhesive GL used to adhesively join the top plate 210 and the upper flange 310 may be the same as the adhesive GL used for the upper joint 250 and the lower joint 260.

[0050] Once the shaft 300 and the top plate 210 are joined, a brake, a speed increaser, a generator 400, etc. are attached to a part of the shaft 300 (for example, the lower end), and necessary wiring is performed, for example, connecting the wind turbine control panel and the generator 400 with wiring.

[0051] The wind turbine basket and wind turbine of the present invention can be used in a variety of buildings, including office buildings and apartment complexes. The present invention allows wind power generation facilities to be built at low cost in a variety of buildings, which is expected to create a more positive motivation for wind power generation. Furthermore, considering the need to provide a stable energy supply while reducing greenhouse gas emissions, the present invention is not only applicable to industry, but can also be expected to make a significant contribution to society.

[0052] 100 Wind turbine of the present invention 200 Wind turbine basket of the present invention 210 Top plate (of wind turbine basket) 211 Shaft hole (of top plate, etc.) 220 Bottom plate (of wind turbine basket) 230 Blade plate (of wind turbine basket) 231 Upper blade plate (of blade plates) 232 Lower blade plate (of blade plates) 240 Middle plate (of wind turbine basket) 250 Upper joint (of wind turbine basket) 260 Lower joint (of wind turbine basket) 270 Middle joint (of wind turbine basket) 271 Upper middle joint (of middle joints) 272 Lower middle joint (of middle joints) 280 Angle member (of wind turbine basket) 281 First abutment surface (of angle member) 282 Second abutment surface (of angle member) 283 (Angle bar) Bolt hole 300 (Wind turbine) Shaft 310 (Shaft) Upper flange 320 (Shaft) Lower flange BL Bolt GL Adhesive NT Nut

Claims

1. A basket that constitutes a wind turbine, comprising: a top plate made of a thin plate material; a bottom plate made of a thin plate material and arranged parallel or nearly parallel to the top plate; a blade plate made of a thin plate material and arranged between the top plate and the bottom plate; an upper joint where the blade plate, arranged perpendicular or nearly perpendicular to the top plate, and the top plate are joined by an angle-shaped member; and a lower joint where the blade plate, arranged perpendicular or nearly perpendicular to the bottom plate, and the bottom plate are joined by the angle-shaped member, wherein the angle-shaped member has a first abutment surface and a second abutment surface that is perpendicular or nearly perpendicular to the first abutment surface, and at the upper joint, the first abutment surface of the angle-shaped member abuts against the top plate and the second abutment surface abuts against the blade plate, and the first abutment surface and the top plate are bolted and adhesively joined, and the second abutment surface and the blade plate are bolted and adhesively joined, said lower joint portion has said first abutment surface abutting against said bottom plate and said second abutment surface abutting against said blade plate, and said first abutment surface and said bottom plate are bolted and adhesively joined together, and said second abutment surface and said blade plate are bolted and adhesively joined together.

2. A wind turbine basket as claimed in claim 1, characterized in that the blade has a part that is curved in a plan view, and the cross-sectional shape of the angle-shaped material that abuts against the curved part of the blade has the same curved shape as the curved shape of the blade at the arrangement position.

3. A wind turbine basket as claimed in claim 1, characterized in that the slats are partly straight and partly curved in plan view, a plurality of the angled members are arranged at intervals at the upper joint, a plurality of the angled members are arranged at intervals at the lower joint, and the length of the angled members abutting the curved portions of the slats is shorter than the length of the angled members abutting the straight portions of the slats.

4. The slats are composed of an upper slat and a lower slat, the upper slat is joined to the top plate at the upper joint, and the lower slat is joined to the bottom plate at the lower joint, and further comprises an intermediate plate between the top plate and the bottom plate, parallel or nearly parallel to the top plate and the bottom plate, the intermediate plate being made of a thin plate material, an upper intermediate joint at which the upper slat, which is arranged perpendicular or nearly perpendicular to the intermediate plate, and the intermediate plate are joined by the angle member, and a lower intermediate joint at which the lower slat, which is arranged perpendicular or nearly perpendicular to the intermediate plate, and the intermediate plate are joined by the angle member, 2. The wind turbine basket according to claim 1, wherein, at the upper intermediate joint, the first abutment surface of the angle-shaped material abuts against the intermediate plate and the second abutment surface abuts against the upper blade plate, and then the first abutment surface and the intermediate plate are bolted and adhesively joined, and the second abutment surface and the upper blade plate are bolted and adhesively joined; and at the lower intermediate joint, the first abutment surface of the angle-shaped material abuts against the intermediate plate and the second abutment surface abuts against the lower blade plate, and then the first abutment surface and the intermediate plate are bolted and adhesively joined, and the second abutment surface and the lower blade plate are bolted and adhesively joined.

5. The wind turbine basket according to claim 1, characterized in that, at the upper joint, the top plate and the blade plate are joined with a structural adhesive, and, at the lower joint, the bottom plate and the blade plate are joined with a structural adhesive.

6. A wind turbine comprising: the wind turbine basket according to any one of claims 1 to 5; and a shaft arranged perpendicular or approximately perpendicular to the top plate, wherein the shaft and the top plate are bolted and adhesively joined at an upper end of the shaft, and the shaft and the bottom plate are bolted and adhesively joined at a lower end of the shaft, and wherein when the blades receive wind, the shaft rotates around its axis together with the wind turbine basket.

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