JP4688771B2 - Gondola suspension mechanism for maintenance of cylindrical steel tower used in horizontal axis wind power generation system, and gondola suspension method for maintenance of cylindrical steel tower - Google Patents

Description

  The present invention relates to a maintenance gondola suspension mechanism for a cylindrical steel tower used in a horizontal axis type wind power generation system that operates a generator by rotating a predetermined blade provided in a nacelle disposed on an upper part of a cylindrical steel tower. The present invention relates to a method for hanging a gondola for maintenance of a cylindrical steel tower.

  The cylindrical steel tower used in the horizontal axis wind power generation system that operates a generator by rotating a predetermined blade provided in the nacelle arranged on the upper part of the cylindrical steel tower does not have a working scaffold or the like It is common.

Therefore, when painting work etc. on a cylindrical steel tower, a method of assembling a scaffold from the ground, a method of placing an aerial work vehicle, or a method of creating a lift type scaffold by installing rails on the wall of a steel tower, etc. Was taken.
nothing special

  However, there are no metal fittings or scaffolding attached to the cylindrical steel tower for wind power generation, and these methods are applied to the extremely high cylindrical power tower for wind power generation of 60 m on average. Was difficult.

  Therefore, we considered a method of hanging a maintenance gondola from the nacelle placed on the top of the cylindrical tower of wind power generation, and tried to pull out the wire directly from the nacelle, but there were no holes in the wall of the nacelle body. Therefore, the wire could not be pulled out from the nacelle.

  For this reason, we tried to provide holes for pulling out wires in the lower part of the nacelle, but the shape and size of the nacelle parts differ from manufacturer to manufacturer. In addition, with respect to the number of wires and the like, it was necessary to proceed with work for determining a preferable hole position and number of wires for each nacelle.

  The present invention has been created in view of the above points. As a first object, a hole is provided in a wall surface (including a floor, front / rear / left / right side walls, a ceiling, etc.) of a nacelle body to suspend a wire or the like. By arranging the mechanism, the above-described problems are solved.

  In addition, the present invention has a plurality of objects as follows.

  That is, as a conventional adverse effect, there has been a case where it is difficult to make a working hole on the bottom surface of the nacelle. For example, flooring such as gratings and striped steel sheets spread in the nacelle becomes an obstacle, or equipment in the nacelle is densely arranged and becomes narrow, making it difficult to secure a working space, etc. This is the case.

  The present invention was created in view of the above points. As a second object, the suspension mechanism can be freely installed when it is difficult to drill a working hole in the bottom surface of the nacelle. By making it possible, the above-described problems are solved.

  Further, as an adverse effect of the prior art, when a working hole is formed in the side surface direction of the nacelle, it may be dangerous to apply a wire load to the hole. For example, if a wall surface material such as FRP on the side surface of the nacelle is subjected to a full load and may damage the wall surface, or if it is difficult to estimate the strength of the wall material of the existing nacelle, As for the reinforcement, there are cases where the reinforced range varies depending on the manufacturer and becomes expensive.

  The present invention was created in view of the above points. As a third object, the jig of the suspension mechanism is protruded in any direction, up, down, front, back, left, and right, regardless of the housing shape of the nacelle. The above-described problems can be achieved by providing a rigid structure mechanism that can suspend and construct a wire without being affected by the strength of the FRP material such as the wall surface or bottom surface of the nacelle housing. It has been solved.

  Furthermore, as a fourth object of the present invention, it is possible to install a hole for operation that can be arranged without bringing the suspension mechanism into contact with the FRP material of the casing, and to perform construction using an existing opening. This solves the above-described problems.

The present invention is a gondola suspension mechanism for maintenance of a cylindrical steel tower used in a horizontal axis type wind power generation system that operates a generator by rotating a predetermined blade provided in a nacelle arranged on an upper part of a cylindrical steel tower. There is a frame body suspended from the nacelle and a gondola suspended from the frame body,
The frame body is equipped with a hanging position adjustment device,
The frame body suspending position adjusting device is disposed horizontally on the frame body, and is disposed so as to surround the suspending point adjusting rail, and a suspending point adjusting rail having a notch for position fixing on the lower surface side. It consists of a cylindrical hanging point adjustment jig that can move horizontally along the adjustment rail, and the hanging point adjustment jig is connected to the fixing wire attached to the nacelle, and slightly upwards due to the pulling force of the wire By moving the engagement notch on the lower side of the cylindrical inner peripheral surface so that it moves and meshes with the position fixing notch of the hanging point adjustment rail to prevent the movement of the hanging point adjustment jig , Solved the problem mentioned above.

  Moreover, the subject mentioned above was solved similarly because the flame | frame main body is arrange | positioned so that the outer peripheral surface of a column-shaped steel tower may be enclosed.

  Furthermore, since the frame body can form a frame in accordance with the shape of the nacelle, the above-mentioned problem has been solved.

  Moreover, the frame main body is suspended from the nacelle by at least four wires, thereby solving the above-described problem.

  In addition, the hang point adjustment jig has solved the above-described problem by arranging a roller that contacts the hang point adjustment rail on the upper side of the cylindrical inner peripheral surface.

  Moreover, the frame main body was suspended by the wire pulled out from the nacelle, thereby solving the above-described problem.

  Furthermore, the frame main body is hung through arms protruding in the horizontal direction from the front, rear, left and right side wall surfaces of the nacelle, thereby solving the above-described problem.

  In addition, the frame main body is suspended through an arm disposed above the upper surface of the nacelle, thereby solving the same problem as described above.

  In addition, the length of the arm can be adjusted to solve the above-mentioned problem.

  Moreover, the arm was supported by the support | pillar standingly installed in the floor board member currently fixed in the nacelle, and solved the subject mentioned above similarly.

  In addition, the above-described problem has been solved by the fact that the pillars standing on the floor plate member receive various loads applied to the arm.

  Moreover, the support | pillar was able to expand-contract in the up-down direction, and solved the subject mentioned above similarly.

  Furthermore, the support | pillar was standingly arranged in the floor board member through the jack member, and solved the subject mentioned above similarly.

  Further, the jack base of the jack member is fixed to the floor plate member covered with the grating in the nacelle via a comb-shaped pedestal that can pass the grating stitch, thereby solving the above-mentioned problem.

  In addition, the nacelle for suspending the frame body has solved the above-described problem by providing a working hole on one of the outer walls such as the lower surface, front and rear left and right side wall surfaces, and the upper surface.

  Moreover, the problem mentioned above was solved by attaching the door for closure to the hole for operation | work provided in the nacelle.

  In addition, the above-described problem has been solved by attaching an extendable anti-rest member that suppresses the swing of the frame body between the arm and the frame body.

  In addition, the gondola is arranged so as to surround the outer peripheral surface of the cylindrical steel tower, thereby solving the above-described problem.

  Furthermore, the gondola can be moved up and down along a cylindrical steel tower, thereby solving the above-mentioned problem.

  Further, the gondola is suspended from the frame body by at least three wires, thereby solving the above-mentioned problem.

  In addition, the above-mentioned problem has been solved by providing an anti-scattering net around the gondola.

  In addition, an anti-scattering net surrounding the nacelle tower is interposed between the frame main body and the gondola, and the anti-scattering net can be expanded and contracted following the up-and-down movement of the gondola relative to the frame main body. Solved the problem mentioned above.

On the other hand, the present invention provides a maintenance gondola suspension for a cylindrical steel tower used in a horizontal axis type wind power generation system that operates a generator by rotating a predetermined blade provided in a nacelle disposed on an upper part of a cylindrical steel tower. A method comprising the steps of suspending a frame body on a nacelle and suspending a gondola on the frame body,
The process of suspending the frame body on the nacelle involves pulling out the tegs from the wire take-up device installed inside the nacelle and connecting it to the lifting wire located on the ground, and winding the tegs with the wire take-up device. The process of taking the lifting wire into the nacelle, the process of fixing the lifting wire to the nacelle, the process of connecting the lifting wire to the lifting wire take-up device of the frame body, and the lifting of the frame body The wire winding device winds up the wire for lifting and lifts the frame body located on the ground to a position close to the nacelle, and the step of fixing the frame body to the nacelle using the fixing wire. In this way, the above-mentioned problem has been solved.

  Moreover, the process of suspending the frame body on the nacelle solved the same problem as described above by suspending the frame body with a wire drawn from the nacelle.

  Moreover, the process of suspending the frame main body on the nacelle solved the same problem as described above by suspending the frame main body via arms protruding in the horizontal direction from the front, rear, left and right side wall surfaces of the nacelle.

  In addition, the step of suspending the frame main body on the nacelle solved the same problem as described above by suspending the frame main body via an arm disposed above the upper surface of the nacelle.

  In addition, the process of suspending the frame body on the nacelle is the same as described above by suspending the frame body using a working hole provided on any of the lower surface, front / rear / left / right side wall surfaces, upper surface and the like of the nacelle. Solved the problem.

  In addition, the process of suspending the gondola on the frame body includes the step of pulling the wire from the frame body and connecting it to the winding winder device of the gondola located on the ground, and winding the wire by the winding winder device to position it on the ground. The above-mentioned problem was solved by comprising a step of lifting the gondola to a position close to the frame body.

  The process of suspending the gondola on the frame body includes either the process of lifting the gondola located on the ground to a position close to the frame body, or the process of hanging the gondola existing near the frame body toward the ground. This also solves the above-mentioned problem.

  Furthermore, the problem mentioned above was also solved by including the process of suspending a rectangular box-shaped standard gondola directly from an arm.

  Moreover, the problem mentioned above was also solved by including the process of directly suspending the rectangular box-shaped standard gondola from the frame body.

  In addition, the problem mentioned above was solved by including the step of attaching a splash prevention net around the gondola.

  Moreover, the problem mentioned above was solved by including the process of interposing the expansion-contraction scattering prevention net which surrounds the tower of a nacelle between a frame main body and a gondola.

  The present invention is a gondola suspension mechanism for maintenance of a cylindrical steel tower used in a horizontal axis type wind power generation system that operates a generator by rotating a predetermined blade provided in a nacelle arranged on an upper part of a cylindrical steel tower. Yes, because it consists of a frame body suspended from the nacelle and a gondola suspended from the frame body, it achieves extremely uniform work when placing the gondola on the steel tower, reducing work time , Work labor can be reduced.

  That is, in the present invention, first, after opening a work hole for hanging the frame body on the outer wall of the nacelle arranged on the upper part of the cylindrical steel tower, the frame body is fixed in the vicinity of the nacelle, Thereafter, a gondola is suspended from the frame body via a wire. For this reason, it is no longer necessary to adopt the preferred position for each site for the position and number of wires to be pulled out from the frame body, realizing extremely uniform work when placing the gondola on the steel tower, and reducing the work time. It is intended to shorten and reduce work labor.

  Moreover, since the frame body is disposed so as to surround the outer peripheral surface of the columnar steel tower, it is easy to fix the frame body to the nacelle. Further, the gondola can be suspended with good balance by this frame body.

  Further, since the frame body can be formed into a frame in accordance with the shape of the nacelle, the frame body having a shape corresponding to the nacelle can be fixed regardless of the shape of the nacelle.

  Moreover, since the frame body is suspended from the nacelle by at least four wires, the frame body can be fixed in the vicinity of the nacelle with a good balance. Further, the frame main body suspended from the nacelle reliably prevents the occurrence of a situation of falling.

  In addition, since the frame main body includes the suspension position adjusting device, the frame main body can be fixed to the nacelle with a good balance.

  In addition, the frame body suspension position adjustment device is disposed horizontally on the frame body, and is disposed so as to surround the suspension point adjustment rail, and a suspension point adjustment rail having a notch for position fixing on the lower surface side. It consists of a cylindrical hanging point adjustment jig that can move horizontally along the point adjustment rail. The hanging point adjustment jig is connected to the fixing wire attached to the nacelle, and is slightly raised by the pulling force of the wire. Since the engagement notch is engraved on the lower side of the cylindrical inner peripheral surface so as to mesh with the position fixing notch of the suspension point adjustment rail and prevent the suspension point adjustment jig from moving, The hanging point adjusting jig can be moved and fixed very easily, and the frame body can be fixed to the nacelle with a good balance.

  In addition, since the suspending point adjustment jig has a roller that contacts the suspending point adjustment rail above the cylindrical inner peripheral surface, the suspending point adjustment jig moves smoothly through this roller. it can.

  Moreover, since the frame main body is suspended from the wire pulled out from the nacelle, the working time can be shortened and the working labor can be reduced.

  Furthermore, since the frame body is suspended through arms protruding in the horizontal direction from the front, rear, left, and right side wall surfaces of the nacelle, it is difficult to drill a working hole on the bottom surface of the nacelle. In addition, the suspension mechanism can be freely installed.

  In other words, when flooring such as gratings or striped steel sheets spread in the nacelle becomes an obstacle, or the equipment in the nacelle is densely arranged and becomes narrow, making it difficult to secure a working space, etc. In this case, the frame main body can be suspended through the arms protruding in the horizontal direction from the front, rear, left and right side wall surfaces of the nacelle.

  In addition, since the frame body is suspended via an arm arranged above the upper surface of the nacelle, the suspension mechanism can be freely installed even if it is difficult to install the arm inside the nacelle. Is possible.

  In addition, since the length of the arm can be adjusted, the length of the arm can be appropriately adjusted according to the size of the nacelle.

  Moreover, the arm is supported by the support | pillar standing in the floor board member currently fixed in the nacelle, and the support | pillar standing in the floor board member can receive the various load concerning an arm.

  Therefore, it can be set as the rigid structure mechanism which can hang and construct a wire, without being influenced by the intensity | strength by FRP materials etc., such as the wall surface and bottom face of a housing | casing of a nacelle.

  Specifically, as a conventional adverse effect, when a working hole is drilled in the side surface direction of the nacelle, it may be dangerous to apply a wire load to the hole. For example, if a wall surface material such as FRP on the side surface of the nacelle is subjected to a full load and may damage the wall surface, or if it is difficult to estimate the strength of the wall material of the existing nacelle, As for the reinforcement, there are cases where the reinforced range varies depending on the manufacturer and becomes expensive.

  In the present invention, since the pillars standing on the floor plate member receive various loads applied to the arm, the lifting mechanism jig can be mounted in any direction, up, down, front, back, left, and right, regardless of the casing shape of the nacelle. It can be a mechanism that can be protruded, and realizes a rigid structure mechanism that can suspend and construct a wire without being influenced by the strength of the FRP material etc. such as the wall surface and bottom surface of the nacelle housing .

  Moreover, since the support | pillar can be expanded-contracted to an up-down direction, the length of a support | pillar can be suitably adjusted according to the magnitude | size of a nacelle. In addition, it is possible to install a work hole that can be arranged without bringing the suspension mechanism into contact with the FRP material of the housing. Further, it is possible to install a suspension mechanism using an existing opening.

  In addition, since the support column is erected on the floor plate member via the jack member, the arm height can be easily adjusted, whereby the horizontal suspension adjustment of the frame body can be performed smoothly.

  Moreover, since the jack base of the jack member is fixed to the floor plate member covered with the grating in the nacelle via a comb-shaped pedestal that can pass the grating stitch, the grating and stripes spread in the nacelle The suspension mechanism can be freely installed without the floor material such as a steel plate becoming an obstacle.

  In addition, the nacelle for suspending the frame body has working holes in the outer wall such as the lower surface, front / rear left / right side wall surfaces, upper surface, etc. It becomes possible to project the jig of the suspension mechanism in a free direction.

  In addition, since a closing door is attached to the working hole provided in the nacelle, it can be easily opened and closed without using a special jig for opening and closing the hole. Moreover, it can be used as a door for lighting, ventilation, etc., except for maintenance work. In addition, it is possible to prevent water leakage during rainy weather.

  In addition, since the telescopic steadying member that suppresses the swinging of the frame main body is attached between the arm and the frame main body, the gondola can be suspended with a good balance through the stable frame main body.

  Moreover, since the gondola is arranged so as to surround the outer peripheral surface of the columnar steel tower, it is possible to easily perform various operations such as painting of the columnar steel tower with an operator on the gondola. .

  In addition, since the gondola can be moved up and down along a cylindrical steel tower, various types of work are performed on the entire tower, from the top to the bottom of the tower, such as maintenance of deterioration investigation, maintenance and repair, and painting of the entire tower. Work can be done.

  Further, since the gondola is suspended from the frame body by at least three wires, the gondola can be suspended from the frame body in a well-balanced manner. In addition, the gondola hung on the frame main body reliably prevents the situation of falling.

  Furthermore, since a splash prevention net is provided around the gondola, it is possible to prevent the paint, etc., from splashing around the gondola deck and in the gap between the gondola and the steel tower.

  Further, an anti-scattering net surrounding the nacelle tower is interposed between the frame main body and the gondola, and the anti-scattering net can be expanded and contracted following the up-and-down movement of the gondola relative to the frame main body. By moving up and down, the scattering prevention net can be smoothly stored and deployed around the steel tower.

  On the other hand, in a gondola suspension method for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system that operates a generator by rotating a predetermined blade provided in a nacelle arranged on the upper part of a cylindrical steel tower, Because it consists of the process of suspending the frame body on the nacelle and the process of suspending the gondola on the frame body, it realizes extremely uniform work when placing the gondola on the steel tower, shortening the work time, Work labor can be reduced.

  That is, in the present invention, first, a frame main body is hung near the nacelle arranged in the upper part of the columnar steel tower, and then a gondola is hung on the frame main body via a wire.

  In this way, the gondola is not directly suspended from the nacelle, but the frame main body is interposed, and in particular, the work of suspending the gondola to the frame main body is standardized. It is no longer necessary to use a preferred position and number for each site, thereby reducing work time and labor.

  In the process of suspending the frame body on the nacelle, the frame body is suspended by the wire drawn from the nacelle. Therefore, the frame body lifted in the vicinity of the nacelle is securely fixed to the nacelle, and the frame body falls. The occurrence of the situation is surely prevented.

  Furthermore, the process of suspending the frame body on the nacelle includes the steps of drawing out the tegs from the wire take-up device installed inside the nacelle and connecting them to the lifting wire located on the ground, and the wire take-up device. Winding the hoisting wire into the nacelle, fixing the hoisting wire to the nacelle, connecting the hoisting wire to the hoisting wire take-up device of the frame main body, and the frame main body Winding the lifting wire with the lifting wire winding device and lifting the frame body located on the ground to a position close to the nacelle; fixing the frame body to the nacelle using the fixing wire; and The frame body can be easily lifted in the vicinity of the nacelle. That.

  In addition, the step of suspending the frame body on the nacelle suspends the frame body via the arms protruding in the horizontal direction from the front, rear, left and right side wall surfaces of the nacelle, so that a work hole is drilled on the bottom surface of the nacelle. Even if this is difficult, the suspension mechanism can be freely installed.

  In other words, when flooring such as gratings or striped steel sheets spread in the nacelle becomes an obstacle, or the equipment in the nacelle is densely arranged and becomes narrow, making it difficult to secure a working space, etc. In this case, the frame main body can be suspended through the arms protruding in the horizontal direction from the front, rear, left and right side wall surfaces of the nacelle.

  In addition, the process of suspending the frame main body on the nacelle is a case where it is difficult to install the arm inside the nacelle because the frame main body is suspended via the arm disposed above the upper surface of the nacelle. However, the suspension mechanism can be freely installed.

  In addition, the process of suspending the frame body on the nacelle suspends the frame body using work holes provided on any one of the lower surface of the nacelle, the front and rear side walls, the upper surface, etc. The holes enable lashing during transportation and use during construction.

  In addition, the process of suspending the gondola on the frame body includes the step of pulling the wire from the frame body and connecting it to the winding winder device of the gondola located on the ground, and winding the wire by the winding winder device to position it on the ground. And the step of lifting the gondola close to the frame body, the gondola can be easily lifted near the frame body.

  The process of suspending the gondola on the frame body includes either the process of lifting the gondola located on the ground to a position close to the frame body, or the process of hanging the gondola existing near the frame body toward the ground. The gondolas can be moved up and down along the cylindrical steel tower. As a result, various operations can be performed on the entire tower, such as painting the entire tower from above to below.

  In addition, since a rectangular box-shaped standard gondola is directly suspended from the arm, the existing gondola can be easily arranged on the cylindrical steel tower without affecting the existing facilities of the wind power generation facility.

  For example, when a circular gondola is not used, various types of gondola, such as a standard gondola or a single-passenger gondola, can be lifted directly by the arm without going through the frame body. Various specifications can be selected.

  In addition, since it includes a step of directly suspending the rectangular box-shaped standard gondola from the frame body, the existing gondola can be easily arranged on the cylindrical steel tower without affecting the existing facilities of the wind power generation facility. For example, when a circular gondola is not used, various gondolas such as a standard gondola or a single-passenger gondola can be lifted through the frame body.

  In addition, since it includes a step of attaching a splash prevention net around the gondola, it is possible to prevent the paint, etc. from splashing around the gondola deck.

  In addition, since it includes a step of interposing a scattering prevention net surrounding the steel tower of the nacelle between the frame body and the gondola, it is possible to prevent scattering of paint or the like in the gap between the gondola and the steel tower.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the present invention is used in a horizontal axis wind power generation system 1 that operates a generator by rotating a predetermined blade B provided in a nacelle N disposed on an upper portion of a cylindrical steel tower P. The present invention relates to a maintenance gondola suspension mechanism for a cylindrical steel tower P and a maintenance gondola suspension method for a cylindrical steel tower P.

  As shown in FIGS. 2 and 3, the maintenance gondola suspension mechanism for the columnar steel tower P includes a frame body F suspended from the nacelle N via a first wire W1 (fixing wire W2 for the frame body F). 4 and FIG. 5, a circular gondola G suspended from the frame body F via a suspension wire W3 for the circular gondola G.

  As shown in FIGS. 1 to 5, the frame main body F is disposed so as to surround the outer peripheral surface of the cylindrical steel tower P, and the frame main body F can be easily fixed to the nacelle N. The circular gondola G can be hung with good balance by the frame body F.

  Further, the frame body F can be formed in a frame according to the shape of the nacelle N, and the frame body F having a shape corresponding to the nacelle N can be fixed regardless of the shape of the nacelle N. .

  Furthermore, the frame body F is suspended from the nacelle N by at least four first wires W1 (fixing wires W2 for the frame body F), and fixes the frame body F in the vicinity of the nacelle N in a well-balanced manner. At the same time, the occurrence of a situation where the frame main body F suspended from the nacelle N falls is reliably prevented.

  In addition, the frame main body F includes the suspension position adjusting device 2, and the frame main body F can be fixed to the nacelle N with a good balance.

  Hereinafter, the configuration of the frame main body F will be described in detail.

  As shown in FIG. 6, the frame main body F has a pair of main frames F1 arranged on both sides of a columnar steel tower P and a base end portion of both main frames F1 in order to connect the pair of main frames F1 to each other. By a pair of connecting frames F2 arranged in parallel on the side, the frame is formed so as to be substantially U-shaped as a whole.

  A reinforcing frame F3 is arranged in a skewed manner between the pair of connecting frames F2. In addition, reinforcing frames F3 are also arranged in an oblique manner between the inner connecting frame F2 and the pair of main frames F1. Furthermore, on the tip side of the pair of main frames F1 opposite to the positions of the pair of connecting frames F2, a pair of projecting frames F4 are arranged inward of each other. The pair of projecting frames F4 are opposed to each other while being slightly shifted back and forth.

  The frame body F (F1, F2, F3, F4) can be freely changed in mounting position and combination according to the shape of the nacelle N and the arrangement of the suspension points.

  The pair of main frames F1, the connecting frame F2 positioned inside the main frame F1, and the pair of protruding frames F4 positioned on the front end side of the main frame F1 surround the outer peripheral surface of the columnar steel tower P. Has been placed.

  As shown in FIG. 6, the frame main body F includes suspension position adjusting devices 2 at four positions on the upper surface side. Specifically, one end side of the connecting frame F2 located on the outside, one end side of the reinforcing frame F3 located on the opposite side, and a pair of protruding frames F4 located on the tip side of the pair of main frames F1. The suspension position adjusting device 2 is disposed on each of the tip sides. The four suspension position adjusting devices 2 are arranged so as to surround the outer peripheral surface of the columnar steel tower P as a whole.

  The four suspension position adjusting devices 2 are arranged so as to surround the outer peripheral surface of the columnar steel tower P as a whole, but according to the shape of the nacelle N and the position of the hole 5 opened in the outer wall of the nacelle N. The frame body F can be attached to an arbitrary position.

  Further, in the frame main body F, as shown in FIGS. 7 to 9, four lifting wire winding devices 4 are attached adjacent to the four lifting position adjusting devices 2.

  On the other hand, inside the nacelle N, as shown in FIG. 10, four electric reels 7D are attached. The electric reel 7D is attached to a position corresponding to the suspension position adjusting device 2 of the frame body F inside the nacelle N.

  In the nacelle N, a hole 5 for introducing the first wire W1 is provided at a position adjacent to the electric reel 7D, and a predetermined curing measure is applied to the hole 5.

  Hereinafter, the lifting of the frame main body F will be described in detail.

  Since the electric reel 7D attached to the inside of the nacelle N winds up the predetermined tag 6, the reel 6 is rewound and pulled out from the hole 5 of the nacelle N, and the first wire W 1 positioned on the ground Connect Tegs 6 to Then, as shown in FIG. 10, the tegs 6 are wound up by the electric reel 7 </ b> D, the first wire W <b> 1 enters the nacelle N, and the first wire W <b> 1 is fixed to the nacelle N. Also, the first wire W1 is connected to the lifting wire take-up device 4 of the frame body F, and the first wire W1 is taken up by the lifting wire take-up device 4 of the frame body F so as to be positioned on the ground. Lift F to a position close to nacelle N.

  In this manner, the frame main body F is suspended from the nacelle N by the four first wires W1. The four first wires W1 that lift the frame body F are, for example, those having a diameter of 8 mm. The first wire W1 having a diameter of 8 mm is merely for lifting the frame body F, and then, for example, the frame body F is fixed to the nacelle N by switching to the fixing wire W2 for the frame body F having a diameter of 12 mm.

  Hereinafter, the fixing of the frame main body F to the nacelle N will be described in detail.

  The frame body F is fixed to the nacelle N using a suspension position adjusting device 2 provided on the frame body F as shown in FIGS.

  The suspension position adjusting device 2 for the frame main body F is disposed horizontally on the frame main body F as shown in FIG. Further, as shown in FIG. 11, the suspending position adjusting device 2 is arranged so as to surround the suspending point adjusting rail 2A and the suspending point adjusting rail 2A in which the position fixing notch 2C is engraved on the lower surface side. It comprises a cylindrical hanging point adjustment jig 2B that can move in the horizontal direction along the rail 2A.

  As shown in FIG. 11, the hanging point adjusting jig 2B is connected to the fixing wire W2 of the frame main body F attached to the nacelle N, and moves slightly upward by the pulling force of the fixing wire W2 of the frame main body F. An engagement notch 2D is formed on the lower side of the cylindrical inner peripheral surface so as to be engaged with the position fixing notch 2C of the suspension point adjusting rail 2A and to prevent the movement of the suspension point adjusting jig 2B.

  The suspending point adjustment jig 2B has a roller 2E that is in contact with the suspending point adjustment rail 2A on the upper side of the cylindrical inner peripheral surface.

  The fixing wire W2 of the frame main body F attached to the hanging point adjusting jig 2B is secured in advance so that the base end portion is attached to the first wire W1, and the frame main body is lifted by the first wire W1. When F is close to the nacelle N and the fixing wire W2 of the frame body F together with the first wire W1 passes through the hole 5 in the outer wall of the nacelle N, the fixing wire W2 of the frame body F is separated inside the nacelle N. The base end portion of the fixing wire W2 of the frame body F is temporarily fixed to the fixing base in the nacelle N (a slack state where no tension is applied). At this time, the frame main body F is in a state of being hung on the nacelle N by four first lifting wires W1 having a diameter of 8 mm.

  At this time, as shown in FIG. 11, the suspending point adjusting jig 2B is not lifted by the fixing wire W2 of the frame main body F, and the force by which the suspending point adjusting jig 2B is lifted upward is not affected. Not done. Therefore, the roller 2E attached to the upper side of the cylindrical inner peripheral surface of the suspending point adjustment jig 2B is in contact with the suspending point adjustment rail 2A. Therefore, the suspending point adjusting jig 2B is moved in the horizontal direction along the suspending point adjusting rail 2A via the roller 2E, and directly below the hole 5 of the nacelle N from which the fixing wire W2 of the frame body F is drawn. The suspension point adjusting jig 2B is disposed on the side.

In the four suspension position adjusting devices 2 installed on the frame body F, all the four suspension point adjustment jigs 2B are placed directly below the holes 5 of the nacelle N from which the fixing wires W2 of the frame body F are drawn. After the arrangement, the lifting wire winding device 4 of the frame main body F is operated to slightly rewind the first wire W1, and the frame main body F is turned into the nacelle N.
Move away from the ground (ground side).

  Then, as shown in FIG. 11, the suspending point adjusting jig 2B is lifted by the fixing wire W2 of the frame body F and lifted upward. As a result, the engagement notch 2D engraved on the lower side of the cylindrical inner peripheral surface of the suspending point adjustment jig 2B meshes with the position fixing notch 2C of the suspending point adjustment rail 2A from below to suspend the point adjustment. The movement of the tool 2B is prevented.

  In this way, the frame main body F is suspended from the nacelle N by the fixing wires W2 of the four frame main bodies F, and is firmly fixed to the nacelle N.

  Then, the circular gondola G is suspended by the wire W3 for suspending the circular gondola G by the frame main body F arranged so as to surround the outer peripheral surface of the columnar steel tower P.

  As shown in FIG. 5, the circular gondola G is disposed so as to surround the outer peripheral surface of a cylindrical steel tower P. Moreover, the circular gondola G can be moved up and down along a cylindrical steel tower P as shown in FIGS. Further, the circular gondola G is suspended from the frame body F by at least three circular gondola G suspension wires W3.

  The configuration of the circular gondola G will be described in detail below.

  As shown in FIGS. 1, 4, and 6, the circular gondola G has a work floor formed in a substantially C-shaped circular donut shape as viewed from above. In addition, the circular gondola G is provided with a pair of left and right blade inspection scaffolds 7 on the C-shaped open part toward the outside. Then, by disposing the C-shaped open portion of the circular gondola G and the pair of left and right blade inspection scaffolds 7 on the blade B side provided in the nacelle N, a part of the blade B is vertically lowered from the nacelle N. Even when it is facing and stopped, the circular gondola G can be moved up and down along the cylindrical steel tower P while avoiding the blade B.

  Further, as shown in FIGS. 1 and 4, the circular gondola G is provided with wind-up winder devices 8 at three positions divided into three at equal intervals. This winding winder device 8 winds up the wire W3 for suspending the circular gondola G or unwinds it, and moves the circular gondola G up and down along the columnar steel tower P. The winding winder device 8 is attached to the circular gondola G so as to be tiltable in the radial direction of the circular gondola G. The circular gondola G can be disassembled into a plurality of parts by a joint system, which will be described later, so that it can be easily transported on a narrow road and assembled and disassembled in a narrow site.

  Hereinafter, lifting of the circular gondola G will be described in detail.

  First, the hanging wire W3 for the three circular gondola G is fixed to the frame main body F, and the frame main body F is lifted while the hanging wire W3 for the circular gondola G is fed out on the ground. As shown in FIGS. 4 and 6, the fixing position of the hanging wire W3 for the circular gondola G is located at the center of the connecting frame F2 located inside the frame main body F and at the tip side of the pair of main frames F1. Two locations of the pair of main frames F1. Two locations of the pair of main frames F1 are located in the vicinity of the base ends of the pair of protruding frames F4. The central part of these connection frames F2 and the two parts located on the tip side of the pair of main frames F1 are respectively located at the apexes of an equilateral triangle.

  As shown in FIG. 4, the tip ends of the suspension wires W <b> 3 of the three circular gondola G fixed to the frame main body F are connected to the three winding winder devices 8 attached to the circular gondola G, respectively. The circular gondola G is disposed so as to surround the outer peripheral surface of the cylindrical steel tower P, and is close to the frame body F fixed to the nacelle N by winding the wire W3 for suspending the circular gondola G by the winding winder device 8. Can be lifted to position. Moreover, the circular gondola G can be suspended toward the ground by rewinding the wire W3 for suspending the circular gondola G by the winding winder device 8. In this way, the circular gondola G is suspended from the frame body F so as to be able to move up and down along the columnar steel tower P.

  For maintenance of the cylindrical steel tower P used in the horizontal axis wind power generation system 1 that operates a generator by rotating a predetermined blade B provided in the nacelle N disposed on the upper part of the cylindrical steel tower P below. The gondola hanging method will be described in detail.

  As shown in FIG. 12, the maintenance gondola suspension method includes a step of suspending the frame body F on the nacelle N via the first wire W1 (the fixing wire W2 of the frame body F), and FIG. As described above, the circular gondola G is suspended from the frame main body F via the suspension wire W3 for the circular gondola G.

  Moreover, the process of suspending the frame main body F on the nacelle N via the first wire W1 (fixing wire W2 for the frame main body F) is an electric reel 7D installed inside the nacelle N as shown in FIG. Pull out the gut 6 from the wire and connect it to the first wire W1 for lifting, which is located on the ground, and wind up the gut 6 with the electric reel 7D and enter the first wire W1 for lifting into the nacelle N A step of fixing the first wire W1 for lifting to the nacelle N, a step of connecting the first wire W1 for lifting to the lifting wire winding device 4 of the frame main body F, The lifting wire winding device 4 winds up the first wire W1 for lifting and brings the frame body F located on the ground to a position close to the nacelle N. A step of raising Ri, and fixing the frame body F to the nacelle N using a fixed wire W2 of the frame body F, consists.

  Further, in the process of suspending the circular gondola G on the frame body F via the suspension wire W3 for the circular gondola G, the suspension wire W3 for the circular gondola G is pulled down from the frame body F as shown in FIG. A step of connecting the winding gondola G of the circular gondola G located on the ground to the winding winder device 8, and the winding winder device 8 winds up the wire W3 for suspending the circular gondola G to frame the circular gondola G positioned on the ground And a process of lifting up to a position close to the main body F.

  Further, the process of suspending the circular gondola G on the frame body F via the suspension wire W3 of the circular gondola G is similar to the frame main body F, as shown in FIG. Both the process of lifting to a position and the process of hanging the circular gondola G present at a position close to the frame main body F toward the ground are included.

  Below, the specific apparatus with which the gondola suspension mechanism for maintenance of the column-shaped steel tower P used for a horizontal axis type wind power generation system is provided is explained in full detail.

(Frame body steadying device)
The steady rest device 9 fixes the frame main body F suspended from the nacelle N to a columnar steel tower P.

  As shown in FIG. 15, the steady rest device 9 is installed in at least three places with respect to the frame main body F. In other words, the steady rest device 9 is installed at three locations, that is, the inner connecting frame F2 constituting the frame main body F, and the tip side portions of the pair of main frames F1. The steady rest device 9 is attached to each of the inner connecting frame F2 and the pair of main frames F1 via an attachment angle adjustable plate 9A.

  As shown in FIG. 16, the steady rest device 9 is configured such that a long screw cylinder 9D having a length adjusting lever 9C is rotatable on a mounting angle adjustable plate 9A with a rotation shaft via a flange 9B. It is attached. A screw rod 9F having four arms 9E that can be opened and closed at the tip is screwed into the screw cylinder 9D. Then, by operating the length adjusting lever 9C, the screw rod 9F rotates with respect to the screw tube 9D, so that the screw rod 9F itself can move back and forth along the screw tube 9D.

  Further, each arm 9E is rotatably connected by a hinge mechanism 9G provided at the tip of the screw rod 9F, and the rear side of the tip side of each arm 9E and the rear of the hinge mechanism 9G along the screw rod 9F. Each arm 9E always maintains a conical open state by stretching the reaction force spring 9H between the two sides. When each arm 9E is pressed against the peripheral surface of the columnar steel tower P, each arm 9E is further rotated in the direction of opening via the hinge mechanism 9G and resists the biasing force of the reaction force spring 9H. The arms 9E are in close contact with the peripheral surface of the cylindrical steel tower P.

  Further, as shown in FIG. 17, damage prevention rubber 9I having a non-slip pattern is attached to the front surface of each arm 9E to improve the adhesion of each arm 9E to the peripheral surface of the columnar steel tower P. Yes. Also, by attaching a plastic roller 9J to the tip of each arm 9E, each arm 9E pressed against the peripheral surface of the columnar steel tower P opens smoothly. In addition, as shown in FIG. 18, you may install four steadying apparatuses 9 with respect to the frame main body F. As shown in FIG.

(Other examples of frame body suspension position adjustment device)
19 to 21 show another example of the hanging position adjusting device 2 for the frame main body F. FIG. The suspension position adjusting device 2 automatically operates the device.

  That is, as shown in FIG. 20, a track rail 21 made of H-shaped steel is disposed on the upper surface of the frame body F as the suspension position adjusting device 2 for the frame body F. The track rail 21 has stoppers at both ends. Then, as shown in FIG. 21, a self-propelled carriage 24 that can be automatically moved on the track rail 21 by a roller 22A and a drive source 22B provided on the track rail 21 and has a winder device 23 on the upper surface. Is installed. In addition, a wire tilt sensor 25 is disposed in the vicinity of the winding winder device 23.

  When the first wire W1 is tilted, the wire tilt sensor 25 is pushed by the first wire W1, the switch 22D is switched on, and the carriage 24 is moved to move the first wire W1. Remove the tilt. When the sensor 25 returns to the original position, the drive source 22B is turned off. Thus, the suspension position adjusting device 2 can be automatically moved directly below the hole 5 of the nacelle N from which the first fixing wire W1 is drawn.

  Then, by pushing a lock pin 26 provided on the side surface of the carriage 24 toward the track rail 21, the carriage 24 is fixed to the track rail 21.

(Balance adjustment device with counterweight that can be freely installed)
The balance adjusting device 10 is attached to an arbitrary position of the frame main body F by a counterweight (not shown) that can be freely installed, so that the horizontal balance of the frame main body F can be always maintained.

(Wire extra length automatic winding device)
In the wire extra length automatic winding device 11, as shown in FIG. 22, the extra length portion of the first wire W1 and the fixing wire W2 of the frame main body F hangs down along the columnar steel tower P. Is to prevent.

  As shown in FIG. 23, the wire surplus length automatic winding device 11 winds the surplus length portion of the first wire W1 by the surplus length wire take-up drum 11A provided on the lower surface side of the frame main body F. The extra length portion of the fixing wire W2 of the frame main body F is the same as described above, or is structured to be accommodated in the wire storage box 11B disposed in the vicinity of the winding winder device 8 on the circular gondola G.

(Nacelle hole curing jig)
As shown in FIG. 24, the curing jig 12 of the hole 5 provided in the nacelle N has a resin pedestal 12B disposed above the hole 5 provided in the nacelle N made of FRP resin, and is hollow or filled with resin. A cylindrical tube body 12C having a cylindrical end section processed into a curved shape in order to prevent damage to the large side surface, the first wire W1, and the fixing wire W2 of the frame body F is provided in the nacelle N. It is mounted across the resin pedestal 12B. Further, a rectangular plate 12D welded in a bowl shape to the upper peripheral surface of the tubular body 12C is arranged so as to be partially embedded in the upper surface of the resin pedestal 12B. Further, as shown in FIG. 25, the upper portion of the tube body 12C is sealed with a cap 12F made of plastic or rubber.

  Further, in order to prevent the cap 12F from falling off or being lost, a loss prevention pin 12E is integrally formed on one end of the upper surface of the plate 12D, and the cap 12F is connected to the loss prevention pin 12E via a loss prevention rope 12G. . The cap 12F is formed in a hollow shape with a bottom, and the upper side is folded back in an inverted U shape so as to be fitted into the opening edge of the tubular body 12C. Further, an annular non-slip protrusion 12H is integrally formed on the outer peripheral surface on the front end side of the cap 12F, and the cap 12F is firmly attached to the tubular body 12C.

(Drilling jig called so-called hole saw)
The hole processing jig 13 is used for forming the hole 5 in the outer wall of the nacelle N made of FRP resin.

  As shown in FIG. 26, the hole drilling jig 13 is a disc-shaped hole cutter 13B having a rotary shaft 13A directly connected to a drill machine (not shown) and an annular cutting edge parallel to the rotary shaft 13A at the peripheral edge. Is fixed, and the cutting edge of the hole cutter 13B rotates coaxially with the rotation of the rotating shaft 13A.

  A pair of blade-shaped drop prevention metal fittings 13C that can swing from the obliquely closed state to the horizontal open state so as to face the cutting edge of the hole cutter 13B are provided on the tip side of the rotating shaft 13A. It is attached.

  When the drilling jig 13 is used, the tip of the rotary shaft 13A is applied to a predetermined location on the outer wall of the nacelle N, and the drilling machine is driven. Then, first, a small hole is formed in the center by the rotating shaft 13A, and then the peripheral portion of the small hole is cut into a circular shape and cut by the cutting edge of the hole cutter 13B. At this time, the fragment cut into the circular shape is received by the drop prevention metal fitting 13C at the tip of the rotating shaft 13A, and the situation where the fragment cut into the circular shape falls below the nacelle N is surely prevented.

(Joint system of circular gondola)
As shown in FIG. 27, the joint system 14 is formed by a polygonal structure 14A such as an octagon so that the circular gondola G can be divided into eight along the circumference, for example, and the mounting angle is free. These polygonal structures 14 </ b> A are connected to each other through a joint fitting (not shown) that can be set as follows.

  Further, as shown in FIG. 28, the polygonal structure 14A is provided with a slide-type opening / closing door portion 14B that can be opened and closed regardless of the connection angle. Furthermore, in conjunction with the opening / closing movement of the sliding opening / closing door portion 14B, a sliding floor portion 14C is provided that can be moved to the adjacent polygonal structure 14A.

(Other example of nacelle lifting wire winding device)
As shown in FIG. 10, the lifting wire winding device 4 of the nacelle N is attached to the one end side of the upper surface of the resin pedestal 12 </ b> B by pivotally attaching the rear end of the arm 7 </ b> B having the gold wheel 7 </ b> A at the tip. The formed flip-up gold wheel 7C and an electric reel 7D disposed on the other end of the upper surface of the resin pedestal 12B in symmetry with the position of the flip-up gold wheel 7C.

  The arm 7B of the flip-up type gold wheel 7C is bent in a substantially square shape, and the lower surface of the bent portion serves as a contact portion 7E with respect to the upper edge of the tubular body 6C.

  When this flip-up type gold wheel 7C is used, the cap is removed from the tube body 6C, and the arm 7B of the flip-up type gold wheel 7C is rotated so that the gold wheel 7A faces the upper side of the tube body 6C. . Then, the tegs 6 connected to the end of the first wire W1 is wound up by the electric reel 7D via the gold wheel 7A, and the first wire W1 is pulled.

  On the other hand, when the flip-up gold wheel 7C is not used, the arm 7B of the flip-up gold wheel 7C is rotated to retract the gold wheel 7A from the position of the tubular body 6C, and a cap is fitted into the tubular body 6C. Keep sealed.

(Other examples of maintenance gondola suspension mechanism)
Hereinafter, another example of the maintenance gondola suspension mechanism for the cylindrical steel tower P used in the horizontal axis wind power generation system will be described in detail.

  The basic installation situation of the suspension mechanism in this example is that work holes are opened in the top, bottom, left, and front and rear surfaces of the casing of the nacelle N of the horizontal axis type wind power generation system, or The structural member of the suspension mechanism is projected outside the casing of the nacelle N using existing openings such as hatches and nacelle lifting work holes.

  At this time, the structural member of the suspension mechanism is projected without applying any load to the hole of the nacelle N or the existing opening itself.

  Furthermore, according to the construction method of this example, it can be installed from any surface such as the top surface, left and right side walls, and front and rear surfaces of the nacelle N depending on the combination of the components of the suspension mechanism and the location of the work holes It is trying to become. In addition, the suspension mechanism used in this construction method can be transported, installed, and removed only by human power without using a large machine such as a heavy machine.

(Structure of the suspension mechanism)
As shown in FIGS. 29 and 30, there are four suspension mechanisms, two at the front and rear positions on the left wall surface and two at the front and rear positions on the right wall surface of the casing of the nacelle N of the horizontal axis wind power generation system. A work hole 5 is opened.

  Further, as shown in FIGS. 31, 32 and 33, a plurality of support columns 32 are arranged on the upper surface of the floor plate member 31 installed and fixed on the floor side in the nacelle N. The arm 33 extending in the direction is supported. That is, each of the arms 33 is supported by the two support columns 32 in the nacelle N so as to protrude outward from the holes 5 of the nacelle N.

  Specifically, the two arms 33 are each supported by the support column 32 so that one end of the arm 33 protrudes at the front and rear positions of the left side wall surface of the nacelle N. Further, the two arms 33 are supported by the columns 32 so that one end of the arm 33 protrudes at the front and rear positions of the right side wall surface of the nacelle N.

  As shown in FIGS. 30 and 33, a frame body F is suspended from one end of the arm 33 protruding from the hole 5 via a fixing wire W2. Further, a circular gondola G is suspended through suspension wires W3 installed at three points on the frame body F.

  The support column 32 that supports the arm 33 in the nacelle N can be freely adjusted in height according to the shape of the nacelle N by interposing a jack member 34, for example.

  As shown in FIG. 34, when the floor board member 31 in the nacelle N is covered with the grating 31 a on the upper surface, the jack base is fixed to the floor board member 31 via the comb-shaped pedestal 35. The comb-shaped pedestal 35 is configured to be able to pass the stitches of the grating 31a.

  At this time, in order to prevent the support column 32 from being displaced on the surface of the jack base that contacts the floor plate member 31, for example, anti-skid measures such as arranging a protrusion or attaching a non-slip sheet such as rubber are taken. ing.

  In addition to changing the height of the column 32 by adjusting the level of the jack member 34 as described above, a method of changing the column 32 having different lengths in an appropriate combination, or the arm 33 in the lateral direction with respect to the column 32 that is erected. There is a method of using it so that it can slide freely.

  Further, as shown in FIG. 31, the columns 32 are connected to each other via a connecting member 37 that can be adjusted in length, such as a single pipe pipe, connected by a connecting clamp 36.

  At this time, the coupling clamp 36 can be attached to an arbitrary position or angle of the support column 32. Further, on the side surface of the support column 32, a metal fitting for arranging support column fixing devices such as a mounting wire is attached. With this metal fitting, a mounting wire or the like can be freely arranged according to the internal state of the nacelle N. In addition, a metal fitting for attaching a fall prevention rope is attached to the side surface of the support column 32.

  The length of the arm 33 can be freely adjusted by appropriately combining beam materials having different lengths according to the internal state of the nacelle N. Further, the arm 33 can freely select either the type in which both ends of the arm 33 protrude from both sides of the nacelle N or the type in which one end of the arm 33 protrudes from only one side of the nacelle N by this combination. .

  Further, as shown in FIGS. 33 and 34, the arm 33 is provided with a plurality of support mounting holes 33a in order to freely adjust the interval between the support posts 32 on both sides supporting the arm 33 by joining with bolts. Yes. In addition, the arm 33 is provided with a bracket for arranging column fixing devices such as a U-shaped handle bracket and a mounting wire that are convenient for transportation and lifting.

  A plurality of attachment devices such as wires and safety ropes are arranged at the tip of the arm 33. Further, as shown in FIG. 34, the arm 33 is provided with a telescopic steady member 38 for suppressing the swinging of the frame body F. One end of the telescopic steady member 38 is fixed to the arm 33 protruding from the nacelle N, and the other end is connected to a universal hand 39 disposed on the frame body F.

  As shown in FIG. 35, the frame main body F suspended from the nacelle N has a pair of main frames F1 disposed on both sides of a columnar steel tower P and a pair of main frames F1. The entire frame is framed by a connecting frame F2 disposed on the base end side of the frame F1 so as to be substantially U-shaped.

  Each of the connecting frame F2 and the pair of main frames F1 is provided with a wire fixing portion 40 for connecting the upper end of the hanging wire W3, and the lower end side of the hanging wire W3 is arranged on the circular gondola G. The circular gondola G is lifted to the frame main body F side by the three suspension wires W3 by being wound around the winder 8.

  Furthermore, a wire fixing portion 41 for connecting the end portion of the fixing wire W2 connected to one end of the arm 33 is provided at the symmetrical position of the pair of main frames F1. Further, a plurality of mounting holes 42 fixed by joining with bolts are provided so that the mounting positions of the wire fixing portions 40 and 41 can be appropriately changed along the longitudinal direction of the pair of main frames F1.

  In the hole 5 provided in the nacelle N, as shown in FIGS. 36 and 37, for example, a movable closing door 51 (hereinafter referred to as a hatch) that can be sealed in a drip-proof manner that can withstand wind pressure based on the Building Standard Law. Can be opened and closed.

  That is, the hatch 51 can be opened and closed outward and upward via the hinge 52 on the upper end side. A handle 53 is attached to the outer center of the hatch 51. The handle 53 is configured such that the open state of the hatch 51 is maintained by hooking a suspension bar 54 disposed on the upper side to the handle 53.

  Further, when the hole 5 of the nacelle N is not used, the closed hatch 51 is prevented from being inadvertently opened by the tightening-adjustable holding screws 55 arranged on the lower side and the left and right sides of the hole 5. . Further, a waterproof seal material 56 is attached to the inner peripheral edge of the hole 5.

  The hatch 51 shown in FIG. 36 is formed in a substantially dish shape whose outer surface is slightly recessed inward, and the hatch 51 shown in FIG. 37 is formed by a flat plate having substantially the same thickness as the wall surface of the nacelle N.

  In addition, the hatch 51 can be selected in various ways, such as adopting a light transmission type that can always illuminate. The opening / closing direction of the hatch 51 can be selected from an outward opening, an inner opening, a vertical direction, a horizontal direction, and the like.

  In addition, by using the same FRP resin as the outer wall of the nacelle N as the opening frame of the hole 5, integration after bonding is possible. Moreover, the hole 5 itself is reduced in weight by processing with FRP resin including this frame portion. Furthermore, it can be produced with a predetermined strength without being influenced by the strength of the existing outer wall.

(Another example of a suspension mechanism installed in advance when the nacelle N is manufactured)
FIG. 38 shows a side protrusion type suspension mechanism. That is, the tip of the arm 33 protrudes from the working hole 5 in which the hatch 51 is opened, and the arm 33 can slide in the lateral direction with respect to the column 32 standing on the floor plate member 31 in the nacelle N. I have to. That is, when the arm 33 is not used, the arm 33 is accommodated in the nacelle N.

  FIG. 39 shows a ceiling protruding type suspension mechanism. In this mechanism, the pillars 32 erected on the left and right positions of the floor plate member 31 in the nacelle N are extendable and retractable by, for example, a hydraulic jack, a mechanical jack using gears and screws, or the like. At the upper end of these columns 32, an arm 33 that can be rotated in the up-and-down direction is attached. In the ceiling of the nacelle N, the arm 33 itself protrudes upward from the pair of work holes 5 in which the hatch 51 is opened, and then the tip of the arm 33 rotates sideways.

  Further, as shown in FIG. 40, on the ceiling of the nacelle N, the arm 33 is horizontally mounted on both support columns 32 protruding upward from the pair of work holes 5 in which the hatch 51 is opened, and both ends of the arm 33 are You may connect the wire W2 for fixation to.

  As shown in FIG. 41, a lid 61 that can be opened in one side is provided so that the entire ceiling of the nacelle N is opened, and the arms 33 that are horizontally mounted on both columns 32 are opened upward by opening the lid 61. The fixing wire W <b> 2 may be connected to one end of the arm 33.

  In addition, as shown in FIG. 42, a middle subframe 62 may be provided on the floor plate member 31 via a pair of support columns 32. At this time, a pair of sub-supports 63 are erected on the sub-frame 62 in a narrow shape. Then, the existing hatch 51 is opened so that the ceiling central portion of the nacelle N is opened, and the sub strut 63 protrudes upward, and the arm 33 is suspended from the sub strut 63 via the suspension member 64.

  Further, as shown in FIGS. 43, 44 (a), and 44 (b), when the circular gondola G is not used, various gondola 71 such as a standard gondola and a single-seat gondola without using the frame main body F are used. May be directly lifted from the arm 33 via the fixing wire W2.

  At this time, as shown in FIG. 43, various gondolas 71 are suspended in a suspended state from the front ends of the arms 33 protruding from the pair of front and rear holes 5 on the side wall surface of the nacelle N via the fixing wires W2. And tow it with a winch or the like installed on the ground.

  As shown in FIG. 44 (a), the existing hatch 51 is opened at one end of the ceiling of the nacelle N, and a pair of arms 33 extending in an L shape are projected from the rectangular opening 72 to fix the nacelle N. Various gondolas 71 may be suspended in a suspended state via the wire W2. Alternatively, the existing hatch 51 behind the nacelle N is opened, the pair of arms 33 is protruded from the rectangular opening 73, and various gondolas 71 are suspended in a suspended state via the fixing wires W2. May be.

  Furthermore, as shown in FIG. 44 (b), a slope portion 74 is provided from the rear side to the bottom surface of the nacelle N, the existing hatch 51 in the slope portion 74 is opened, and a pair of arms is formed from the rectangular opening portion 75. The fixing wire W2 connected to the tip of 33 may be suspended.

  FIG. 45 shows a configuration in which blade inspection is possible using the frame body F.

  That is, an auxiliary frame 81 is extended on the blade side of the frame main body F, and a pair of pulleys are attached to rails formed along the auxiliary frame 81 so as to be movable back and forth. Various gondolas 71 such as a ride gondola are directly suspended via a suspension wire 82.

  Then, a balance auxiliary frame 83 is extended to the opposite rear side of the frame main body F, and a balance wire 84 for adjusting the balance of the frame main body F is attached to the balance auxiliary frame 83, and this is tensioned on the ground. As a result, the load balance with the various gondola 71 suspended at the tip is adjusted.

  That is, the balance wire 84 plays a role of adjusting the inclination of the frame main body F itself by the load of the various gondola 71 suspended on the front side of the frame main body F to keep it substantially horizontal. At this time, a balance weight 85 is attached to the balance auxiliary frame 83. The balance wire 84 is secured to the ground anchor 86 via the turnbuckle 87.

  FIG. 46 shows a configuration in which a small scattering prevention net 91 is stretched around the circular gondola G.

  That is, the anti-scattering net 91 is formed to have a length that can completely cover the circumference of the circular gondola G, and rollers 93 are attached to the upper and lower sides of the circular gondola G via the net arms 92 at, for example, four equal intervals. The roller 93 rolls along the circumferential direction while being in contact with the circumferential surface of the columnar steel tower P so as to be slidable. Further, the anti-scattering net 91 deployed on the upper and lower parts of the circular gondola G is structured to follow the diameter of the steel tower P that changes when the circular gondola G is raised and lowered, and prevents scattering even while the circular gondola G is raised and lowered. The net 91 can always maintain a state of being in close contact with the steel tower P.

  When the scattering prevention net 91 is not used, the scattering prevention net 91 is folded at one end of the circular gondola G by moving the rollers 93 in the direction in which they are closed along the circumferential direction. Further, when the scattering prevention net 91 is used, the rollers 93 move in a direction of opening each other along the circumferential direction, so that the scattering prevention net 91 is unrolled around one end of the circular gondola G. Is done.

  FIG. 47 shows a configuration in which a scattering prevention net 91 is stretched around a steel tower P using a circular gondola G and a frame main body F in combination.

  That is, a net storage case 94 for storing the lower side of the telescopic scattering prevention net 91 suspended from the frame body F in a folded shape is attached to the upper outer peripheral edge of the circular gondola G. The scattering prevention net 91 is provided so as to be able to expand and contract following the up-and-down movement of the circular gondola G with respect to the frame main body F. As a result, when the circular gondola G descends from the upper side of the steel tower P to the lower side of the frame main body F, the anti-scattering net 91 surrounding the steel tower P is stretched between the frame main body F and the circular gondola G. Established.

  On the other hand, when the circular gondola G rises from the lower side of the steel tower P to the upper side with respect to the frame body F, the scattering prevention net 91 surrounding the steel tower P is relaxed at the lower end side in the net storage case 94 of the circular gondola G. Stored.

  Note that, on the lower side of the circular gondola G, the anti-scattering net 91 is developed in an inverted conical shape through the net arm 92 and the roller 93 described above.

  As a method for connecting the suspension wire and the base in the nacelle N, there is a method of using a wedge-shaped clamp K1 used for a crane hook as shown in FIG. Further, as shown in FIG. 48B, there is a method of using, for example, a two-sheet clamp type wire clamp K2 used for an overhead wire tool. In addition to this, a method of using a compression terminal for a wire terminal (not shown), a method of fixing each time with a wire clip (not shown), a method of using a wire-specific gripping bracket such as a KITO clip (see FIG. A well-known method such as (not shown) is adopted.

  The maintenance gondola suspension mechanism for the cylindrical steel tower P used in the horizontal axis wind power generation system according to the present invention and the maintenance gondola suspension method for the cylindrical steel tower P include, for example, a power transmission tower, a radio tower, a water tower, and the like. It is widely applied to painting, inspection, repair work, etc. of steel towers P of various circumferential shapes.

It is a perspective view which shows the state which suspended the frame main body via the wire in the nacelle, and also suspended the circular gondola on the frame main body via the wire in the steel tower of a horizontal axis type wind power generation system. It is a perspective view which shows the state which lifts a frame main body via a wire in the steel tower of a horizontal axis type wind power generation system. It is a side view which shows the state which lifts a frame main body via a wire in the steel tower of a horizontal axis type wind power generation system. It is a perspective view which shows the state which lifts a circular gondola through a wire in the steel tower of a horizontal axis type wind power generation system. It is a side view which shows the state which lifts a circular gondola through a wire in the steel tower of a horizontal axis type wind power generation system. It is a top view which shows the assembly | attachment state of the frame main body and circular gondola with respect to a steel tower. It is a side view which shows the assembly | attachment state of the frame main body and circular gondola with respect to a steel tower. It is a front view which shows the assembly | attachment state of the frame main body and circular gondola with respect to a steel tower. It is a side view which shows an example of the suspension position adjustment apparatus in a frame main body. It is a side view which shows an example of the lifting wire winding apparatus attached to the nacelle. It is a side view which shows the structure of the position adjustment apparatus in a frame main body. It is explanatory drawing which detailed the process of suspending a frame main body to a nacelle via a wire. It is explanatory drawing which detailed the process of suspending a circular gondola on a frame main body via a wire. It is explanatory drawing which detailed the content of the process of suspending a circular gondola on a frame main body via a wire. It is a top view which shows the structure of the steadying apparatus in a frame main body. It is a side view which shows the operation state of the steadying apparatus in a flame | frame main body. It is an enlarged front view which shows the state which the front-end | tip part of the steadying apparatus opened. It is a top view which shows the other structure of the steadying apparatus in a frame main body. It is a side view which shows the other example of the suspension position adjustment apparatus in a frame main body. It is an enlarged side view which shows the other example of the suspension position adjustment apparatus in a frame main body. It is an enlarged front view which shows the other example of the suspension position adjustment apparatus in a frame main body. It is the side view which showed the state which the extra length part of a wire hangs down along a column-shaped steel tower. It is a side view which shows the outline of a wire extra length automatic winding apparatus. It is a side view which shows the structure of the curing jig distribute | arranged to the hole of the nacelle. It is a side view which shows the state which has sealed the curing jig distribute | arranged to the hole of the nacelle with the cap. It is a side view which shows the structure of a hole processing jig. It is a bottom view which shows the structure of the joint system of a circular gondola. It is a side view which shows the structure of the slide-type opening / closing door part of a polygonal structure. Schematic side view showing another example of the maintenance gondola suspension mechanism, in which the arm of the suspension mechanism protrudes from the working hole opened in the side wall of the nacelle and the frame body is suspended through this arm FIG. It is a perspective view which shows the state which makes the arm of a suspension mechanism project from the hole for work opened on the side wall of the nacelle, and has suspended the frame main body via this arm. It is a top view which shows the assembly | attachment state of the arm in a nacelle, and the protrusion state of the arm from a nacelle. It is a perspective view which shows the state in which the arm is attached to the upper surface of a floor board member through the support | pillar via the support | pillar. FIG. 6 is a rear view showing a state in which one end of an arm is protruded from a working hole opened in the side wall of the nacelle, a frame main body is suspended through the arm, and a circular gondola is suspended from the frame main body. FIG. 6 is a rear view showing a state in which one end of an arm is protruded from a working hole opened in the side wall of the nacelle, a frame main body is suspended through the arm, and a circular gondola is suspended from the frame main body. The structural example of a frame main body is shown, (a) is a top view, (b) is a front view, (c) is a side view. The structural example of a hatch is shown, (a) is a perspective view, (b) is sectional drawing. The other structural example of a hatch is shown, (a) is a perspective view, (b) is sectional drawing. It is a front view which shows the other example of the suspension mechanism using the arm which slides and protrudes in the side wall of a nacelle. It is a front view which shows the other example of the suspension mechanism using the arm rotated above a nacelle. It is a front view which shows the other example of the suspension mechanism using the arm arrange | positioned above the nacelle. It is a front view which shows the other example of the suspension mechanism using an arm in the nacelle provided with the lid | cover part which can be opened once. It is a front view which shows the other example of the suspension mechanism using the arm arrange | positioned above the nacelle. It is a schematic side view which shows the state which the arm has suspended various gondola without going through a flame | frame main body. The other example of the state which the arm has suspended various gondola is shown, (a) is a perspective view, (b) is a side view. It is a schematic side view which shows the state which extended the auxiliary | assistant frame to the frame main body and suspended various gondola. It is a side view which shows the structure which has spread the scattering prevention net around the circumference | surroundings of a circular gondola. It is a side view which shows the structure which spreads the scattering prevention net around the steel tower using a circular gondola and a frame main body together. An example of the jig | tool used for the connection of a hanging wire and a stand is shown, (a) is a side view of a wedge-shaped clamp, (b) is a side view of a wire-dedicated clamp.

Explanation of symbols

P ... Cylindrical steel tower B ... Blade N ... Nasser F ... Frame body F1 ... Main frame F2 ... Connection frame F3 ... Reinforcement frame F4 ... Projection frame G ... Circular gondola W1 ... First wire W2 ... Fixing wire W3 ... Circular Wire for hanging the gondola K1 ... Wedge clamp K2 ... Wire dedicated clamp 1 ... Horizontal axis wind power generation system 2 ... Hanging position adjusting device 2A ... Hanging point adjusting rail 2B ... Hanging point adjusting jig 2C ... Indent for fixing position 2D ... Engagement notch 2E ... Roller 4 ... Lifting wire take-up device 5 ... Hole 6 ... Tegs 6C ... Tubing 7 ... Blade inspection scaffold 7A ... Gold wheel 7B ... Arm 7C ... Spring type gold wheel 7D ... Electric reel 7E ... Buffer Material (cushion material)
DESCRIPTION OF SYMBOLS 8 ... Winding-up winder device 9 ... Stabilizer 9A ... Mounting angle free plate 9B ... Flange 9C ... Length adjustment lever 9D ... Screw cylinder 9E ... Arm 9F ... Screw rod 9G ... Hinge mechanism 9H ... Reaction force spring 9I ... Damage prevention rubber 9J ... Plastic roller 10 ... Balance adjustment device 11 ... Automatic wire length take-up device 11A ... Wire length take-up drum 11B ... Wire storage box 12 ... Curing jig 12B ... Resin base 12C ... Tube 12D ... Plate 12E ... Loss Prevention pin 12F ... Cap 12G ... Loss prevention rope 12H ... Annular anti-slip projection 13 ... Hole drilling jig 13A ... Rotating shaft 13B ... Hall cutter 13C ... Fall prevention fitting 14 ... Joint system 14A ... Polygonal structure 14B ... Slide type Opening / closing door 14C ... Sliding floor 21 ... Track rail 22 ... roller 22B ... drive source 23 ... hoist winder apparatus 24 ... carriage 25 ... wire tilt sensor 26 ... lock pin 31 ... floor member 31a ... flooring (grating)
32 ... Column 33 ... Arm 33a ... Column mounting hole 34 ... Jack member 35 ... Comb base 36 ... Connection clamp 37 ... Connection material 38 ... Telescopic anti-rest member 39 ... Universal hand 40 ... Wire fixing portion 41 ... Wire fixing portion 42 ... Wire fixing part mounting hole 51 ... Hatch 52 ... Hinge 53 ... Handle 54 ... Suspension bar 55 ... Presser screw 56 ... Waterproof seal material 61 ... Lid part 62 ... Sub frame 63 ... Sub prop 64 ... Suspension material 71 ... Various gondola 72 ... Opening 73 ... Opening 74 ... Slope 75 ... Opening 81 ... Auxiliary frame 82 ... Suspension wire 83 ... Balance auxiliary frame 84 ... Balance wire 85 ... Balance weight 86 ... Anchor 87 ... Turnbuckle 91 ... Spattering prevention net 92 ... Arm for net 93 ... Roller 94 ... Net storage case

Claims (33)

It is a gondola suspension mechanism for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system that operates a generator by rotating a predetermined blade provided in a nacelle arranged at the top of a cylindrical steel tower. It consists of a suspended frame body and a gondola suspended on the frame body.
The frame body is equipped with a hanging position adjustment device,
The frame body suspending position adjusting device is disposed horizontally on the frame body, and is disposed so as to surround the suspending point adjusting rail, and a suspending point adjusting rail having a notch for position fixing on the lower surface side. It consists of a cylindrical hanging point adjustment jig that can move horizontally along the adjustment rail, and the hanging point adjustment jig is connected to the fixing wire attached to the nacelle, and slightly upwards due to the pulling force of the wire A horizontal axis type with a notch for engagement on the lower side of the cylindrical inner peripheral surface so that it moves and engages with the notch for fixing the position of the suspension point adjustment rail to prevent the suspension point adjustment jig from moving. A gondola suspension mechanism for maintenance of cylindrical steel towers used in wind power generation systems.   The frame main body is a gondola suspension mechanism for maintenance of a cylindrical steel tower used in the horizontal axis wind power generation system according to claim 1, which is disposed so as to surround an outer peripheral surface of the cylindrical steel tower.   The frame main body can be formed into a frame in accordance with the shape of the nacelle. The maintenance-use gondola suspension mechanism for a cylindrical steel tower used in a horizontal axis wind power generation system for a cylindrical steel tower according to claim 1 or 2.   The frame main body is a gondola suspension mechanism for maintenance of a cylindrical steel tower used in the horizontal axis wind power generation system according to any one of claims 1 to 3, wherein the frame body is suspended from the nacelle by at least four wires. The column-shaped steel tower used for the horizontal axis type wind power generation system according to claim 1 , wherein the suspending point adjusting jig has a roller abutting on the suspending point adjusting rail disposed above the cylindrical inner peripheral surface. Gondola suspension mechanism for maintenance. The frame main body is a gondola suspension mechanism for maintenance of a cylindrical steel tower used in the horizontal axis wind power generation system according to any one of claims 1 to 4 , wherein the frame body is suspended from a wire drawn from the nacelle. The column-shaped steel tower used for the horizontal axis type wind power generation system according to any one of claims 1 to 4 , wherein the frame main body is suspended through arms protruding in the horizontal direction from front, rear, left and right side wall surfaces of the nacelle. Gondola suspension mechanism for maintenance. The frame main body is suspended through an arm disposed above the upper surface of the nacelle, and a cylindrical gondola for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system according to any one of claims 1 to 4. Hanging mechanism. The arm is a gondola suspension mechanism for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system according to claim 7 or 8 , wherein the length of the arm can be adjusted. Maintenance of the column-shaped steel tower used for the horizontal axis type wind power generation system in any one of Claims 7 thru | or 9 with which an arm is supported by the support | pillar standing upright on the floor board member currently fixed in the nacelle Gondola suspension mechanism. 11. A maintenance gondola for a cylindrical steel tower for use in a horizontal axis wind power generation system according to any one of claims 7 to 10 , wherein various loads applied to the arm are received by a support column standing on the floor plate member. Hanging mechanism. 12. The maintenance gondola suspension mechanism for a columnar steel tower used in a horizontal axis wind power generation system according to claim 10 or 11 , wherein the column is extendable in the vertical direction. The column-shaped maintenance tower gondola suspension mechanism used in the horizontal axis type wind power generation system according to any one of claims 10 to 12 , wherein the column is erected on the floor plate member via a jack member. The jack base of the jack member is used for the horizontal axis wind power generation system according to claim 13 , which is fixed to a floor plate member covered with grating in the nacelle via a comb-shaped pedestal capable of passing a grating stitch. Gondola suspension mechanism for maintenance of cylindrical steel towers. The horizontal axis type wind power generation system according to any one of claims 6 to 8 , wherein the nacelle for suspending the frame main body is provided with a working hole in any one of the outer walls such as a lower surface, front and rear side walls, and an upper surface. Gondola suspension mechanism for maintenance of columnar steel towers used for construction. The gondola suspension mechanism for columnar steel tower maintenance used in the horizontal axis wind power generation system according to claim 15 , wherein a closing door is attached to a work hole provided in the nacelle. The maintenance of the column-shaped steel tower used for the horizontal axis type wind power generation system in any one of Claims 7 thru | or 10 which attaches the expansion-contraction-type steady member which suppresses rocking | fluctuation of a frame main body between an arm and a frame main body. Gondola suspension mechanism.   The gondola suspension mechanism for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system according to claim 1, wherein the gondola is arranged so as to surround an outer peripheral surface of the cylindrical steel tower. The gondola suspension mechanism for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system according to claim 1 or 18 , wherein the gondola can be moved up and down along a cylindrical steel tower. The gondola is suspended from a frame main body by at least three wires, and the gondola for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system according to any one of claims 1, 18 and 19 is used. mechanism. Around the gondola, claim 1, which additionally provided a scattering prevention nets, horizontal axis type wind power columnar shape used in the system tower of maintenance gondola hanging mechanism according to any one of claims 18 to 20. The anti-scattering net surrounding the tower of the nacelle is interposed between the frame main body and the gondola, and the anti-scattering net can be expanded and contracted following the up-and-down movement of the gondola with respect to the frame main body. A gondola suspension mechanism for maintenance of a cylindrical steel tower used in the horizontal axis wind power generation system according to any one of 18 to 21 . It is a gondola suspension method for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system that operates a generator by rotating a predetermined blade provided in a nacelle arranged on the top of a cylindrical steel tower. The process comprises the steps of suspending the frame body and suspending the gondola on the frame body.
The process of suspending the frame body on the nacelle involves pulling out the tegs from the wire take-up device installed inside the nacelle and connecting it to the lifting wire located on the ground, and winding the tegs with the wire take-up device. The process of taking the lifting wire into the nacelle, the process of fixing the lifting wire to the nacelle, the process of connecting the lifting wire to the lifting wire take-up device of the frame body, and the lifting of the frame body The wire winding device winds up the wire for lifting and lifts the frame body located on the ground to a position close to the nacelle, and the step of fixing the frame body to the nacelle using the fixing wire. For maintenance of cylindrical steel towers used in horizontal axis wind power generation systems Handler hanging method. The method of suspending the frame body on the nacelle is a maintenance gondola suspension method for a cylindrical steel tower used in a horizontal axis wind power generation system according to claim 23 , wherein the frame body is suspended by a wire drawn from the nacelle. 24. The column used in the horizontal axis wind power generation system according to claim 23 , wherein the step of suspending the frame body on the nacelle suspends the frame body through arms protruding in the horizontal direction from the front, rear, left and right side wall surfaces of the nacelle. Gondola suspension method for maintenance of shaped steel towers. To suspended frame body nacelle step, of cylindrical shape used in the horizontal axis wind power generation system of claim 23, suspended frames body via an arm which is arranged above the upper surface of the nacelle pylon Gondola suspension method for maintenance. A step of suspended frame body nacelle, the lower surface of the nacelle, either before or after the right and left side wall surfaces, claims 23 to 26 suspended frame body by utilizing the holes for work provided on either the upper surface or the like The gondola suspension method for maintenance of the column-shaped steel tower used for the horizontal axis type wind power generation system of description. The process of suspending the gondola on the frame main body is a process of pulling down the wire from the frame main body and connecting it to the winding winder device of the gondola located on the ground, and winding the wire by the winding winder device and positioning it on the ground A method for suspending a cylindrical steel tower for use in a horizontal axis wind power generation system according to claim 23 , comprising the step of suspending a gondola to a position close to the frame body. The process of hanging the gondola on the frame body includes both the process of lifting the gondola located on the ground to a position close to the frame body and the process of hanging the gondola existing near the frame body toward the ground. 29. A gondola suspension method for maintenance of a cylindrical steel tower used in the horizontal axis wind power generation system according to claim 23 or 28 . 27. A method for suspending a cylindrical steel tower maintenance gondola used in a horizontal axis wind power generation system according to claim 25 or 26 , comprising the step of directly suspending a rectangular box-shaped standard gondola from an arm. 24. A method for suspending a cylindrical steel tower maintenance gondola used in a horizontal axis wind power generation system according to claim 23 , comprising a step of directly suspending a rectangular box-shaped standard gondola from a frame body. 30. A gondola suspension method for maintenance of a cylindrical steel tower used in a horizontal axis wind power generation system according to any one of claims 23 , 28 or 29 , comprising a step of attaching a scattering prevention net around a gondola. Between the frame body and the gondola, claim 23 including the step of interposed a stretchable shatterproof net surrounding the tower of the nacelle, the horizontal axis wind power generation system according to any one of claims 28 or 29 A gondola suspension method for maintenance of the cylindrical steel tower used.

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