Lift-up device

Abstract

To easily remove a lifting device from a support pillar without pulling out upward.SOLUTION: A guide tower 21 includes: a pair of front pillars 22; and a front rail 30 and a rear rail respectively fixed to a front face 22c and a rear face of the front support pillar 22. A lifting device 40 includes: a pair of vertical frames 41; a lifting mechanism for lifting / lowering the vertical frame 41 with respect to the front support pillar 22; and a front roller 46 and a rear roller for guiding the lifting / lowering of the lifting mechanism while being engaged with the front rail 30 and the rear rail, respectively. The front rail 30 and the rear rail include: a rail body 34a having a notch part 34b; and a rail split body 34c detachably fixed to the front support pillar 22 at the notch part 34b. The lifting device 40 is configured to remove the front support pillar 22 by moving the front roller 46 and the rear roller to the outside in a width direction via the notch part 34b where the rail split body 34c is removed.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a lift-up device. [Background technology]

[0002] In a construction method for constructing a wind power generator, a lift-up device is used to transport materials to the top of the tower under construction (see, for example, Patent Document 1). The lift-up device includes a guide tower that is installed around the tower, and a lifting device that is supported by the guide tower and is configured to be able to move up and down along the guide tower.

[0003] The guide tower has a pair of front support columns spaced apart in the width direction and connected to each other, and a pair of rear support columns located behind the pair of front support columns, spaced apart in the width direction and connected to each other. The front support columns and rear support columns adjacent to each other in the fore-and-aft direction are connected via beam members.

[0004] A front rail and a rear rail extending in the up-down direction are fixed to the front and rear surfaces of the front support pillar, respectively. The lifting device has a pair of vertical frames arranged adjacent to the pair of front support columns on the outside in the width direction. A lifting mechanism is attached to the vertical frames for raising and lowering the vertical frames relative to the front support columns. The lifting device has front rollers and rear rollers slidably mounted on the front rail and the rear rail, respectively. A pair of flanges protruding outward from both axial ends of the front rollers and rear rollers engage with the side surfaces of the front rails and rear rails, respectively.

[0005] A pair of frames extending along the front-rear direction are connected to the upper ends of the pair of vertical frames, respectively. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-120775 Summary of the Invention [Problem to be solved by the invention]

[0007] When dismantling the lift-up device, if you try to remove the vertical frame by moving it outward in the width direction from the front support column, the flanges of the front and rear rollers interfere with the front and rear rails, which means you have to pull the lifting device, including the vertical frame, upward along the front support column, making the removal process complicated. [Means for solving the problem]

[0008] Various aspects of the lift-up device for solving the above problems will be described below. [Aspect 1] A lift-up device comprising: a guide tower provided around a tower of a wind power generator; and a lifting device supported by the guide tower and configured to be able to move up and down along the guide tower, When a direction perpendicular to the up-down direction is defined as a front-rear direction, and a direction perpendicular to both the up-down direction and the front-rear direction is defined as a width direction, The guide tower is A pair of support columns arranged at an interval in the width direction; a front rail and a rear rail fixed to the front and rear surfaces of the support column, respectively; The lifting device is a pair of vertical frames arranged adjacent to each other on the outer sides of the pair of support columns in the width direction; an elevating mechanism attached to the vertical frame and configured to elevate and lower the vertical frame relative to the support column; a front roller and a rear roller that engage with the front rail and the rear rail, respectively, and guide the lifting mechanism in a vertical movement; The front rail and the rear rail are a rail body extending in the vertical direction and having a cutout portion in which a portion in the vertical direction is cut out; a rail segment detachably fixed to the support at the cutout portion, The lifting device is configured to be removable from the support by moving the front rollers and the rear rollers outward in the width direction through the cutouts when the rail segments are removed. Lift-up device.

[0009] With this configuration, when the rail segments are removed from the support columns of the guide tower, the lifting device can be removed from the support columns by moving the front and rear rollers outward in the width direction through the cutouts. Therefore, the lifting device can be easily removed from the support columns without having to pull it out upward.

[0010] [Aspect 2] The rail segments are detachably fixed to the support posts via bolts. The lift-up device according to aspect 1.

[0011] According to this configuration, the rail segments can be easily attached and detached to and from the support posts by attaching and detaching the bolts. [Effects of the Invention]

[0012] According to the present invention, the lifting device can be easily removed from the support without having to be pulled out upward. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of a wind power generator according to one embodiment. [Figure 2] FIG. 2 is a perspective view showing a state in which a blade is suspended by a suspension jig of a stand disposed on an elevation device of a lift-up device according to one embodiment. [Figure 3] FIG. 3 is a perspective view of the lift-up device, focusing on the lifting device of FIG. [Figure 4] 4 is a front view of the lift-up device showing the vertical frame, the clamping mechanism, and the guide tower of the lifting device of FIG. 2. FIG. [Figure 5] FIG. 5 is an enlarged front view of the right vertical frame of FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. [Figure 8] FIG. 8 is an enlarged cross-sectional view showing a main part of FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. [Figure 10] FIG. 10 is a side view of the lower part of the guide tower. [Figure 11] FIG. 11 is a front view showing the vertical frame at its lowest position, in preparation for removal from the guide tower. [Figure 12] FIG. 12 is a front view showing the state in which the vertical frame is being removed from the guide tower. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment will be described with reference to the drawings. <Wind turbine generator 10> As shown in FIG. 1, a wind turbine generator 10 includes a tower 11 installed on a foundation, a nacelle 12 installed on the top of the tower 11, and a rotor 13 attached to the nacelle 12.

[0015] The tower 11 is formed by stacking a plurality of towers 11a to 11e. The tower 11 is formed of, from the bottom up, a bottom tower 11a, three middle towers 11b to 11d, and a top tower 11e. The tower 11 is cylindrical.

[0016] The rotor 13 has a hub 14 and a plurality of blades 15a, 15b, and 15c extending radially from the hub 14. The hub 14 is provided with a plurality of blade attachment openings 14a, 14b, and 14c to which the base ends of the plurality of blades 15a, 15b, and 15c are attached, respectively (see FIG. 2). In this embodiment, three blades 15a, 15b, and 15c are provided at 120-degree intervals around the hub 14.

[0017] <Lift-up device 20> As shown in FIG. 2, the lift-up device 20 includes a guide tower 21 provided around the tower 11, and a lifting device 40 supported by the guide tower 21 and configured to be able to move up and down along the guide tower 21.

[0018] In the following description, a direction perpendicular to the up-down direction is referred to as a front-rear direction, and a direction perpendicular to both the up-down direction and the front-rear direction is referred to as a width direction. The front-rear direction and the width direction are horizontal directions.

[0019] (Guide Tower 21) As shown in FIG. 2, the guide tower 21 includes a substantially square frame-shaped base 27 installed on the ground, and four support columns 22 and 23 erected on the four corners of the base 27.

[0020] The four pillars 22, 23 include a pair of front pillars 22 spaced apart in the width direction and connected to each other, and a pair of rear pillars 23 located behind the pair of front pillars 22, spaced apart in the width direction, and connected to each other.

[0021] The pair of front support columns 22 are connected to each other via a beam 24. The pair of rear support columns 23 are connected to each other via a beam 25. The front support columns 22 and rear support columns 23 that are adjacent in the front-to-rear direction are connected to each other via a beam 26.

[0022] Each of the pillars 22, 23 is divided into a plurality of parts in the vertical direction. Each of the pillars 22, 23 has a truss structure in the shape of a square pillar. The beams 24 to 26 also have a truss structure. The guide tower 21 includes a pair of lead-in rails 28 that are installed on the ground. The pair of lead-in rails 28 extend in the front-rear direction and are connected to the front end of the base 27.

[0023] A stay ring 29 is disposed between the tower 11 and the guide tower 21, and supports the guide tower 21 on the tower 11 by transmitting horizontal force between the tower 11 and the guide tower 21. In this embodiment, a plurality of stay rings 29 are provided at intervals from one another in the vertical direction.

[0024] 7 and 9, a front rail 30 and a rear rail 31 extending in the up-down direction are fixed to the front surface 22c and the rear surface 22d of the front support 22, respectively. The front rail 30 and the rear rail 31 are arranged to sandwich the front support 22. The front rail 30 and the rear rail 31 are provided outward of the beam material 26 in the width direction.

[0025] An inner rail 32 and an outer rail 33 extending in the up-down direction are fixed to the inner and outer side surfaces 22a, 22b, respectively, in the width direction of the front support column 22. The inner rail 32 and the outer rail 33 are arranged so as to sandwich the front support column 22. The inner rail 32 and the outer rail 33 are provided forward of the beam material 24.

[0026] (Lifting device 40) As shown in FIGS. 2 and 3, the lifting device 40 has a pair of vertical frames 41, a pair of upper horizontal frames 42, and a pair of lower horizontal frames 43.

[0027] The vertical frame 41 is disposed adjacent to the front support column 22 on the outer side in the width direction. The vertical frame 41 extends in the up-down direction. The vertical frame 41 has a truss structure.

[0028] An upper horizontal frame 42 is connected to the upper end of the vertical frame 41. The upper horizontal frame 42 protrudes forward from the vertical frame 41 and extends along the front-to-rear direction.

[0029] A lower horizontal frame 43 is connected to the lower end of the vertical frame 41. The lower horizontal frame 43 protrudes rearward from the vertical frame 41 and extends in the front-to-rear direction.

[0030] A stand 60 is disposed on the pair of upper horizontal frames 42. The stand 60 is configured to suspend a suspending jig 70. The suspending jig 70 suspends the blades 15a, 15b, and 15c.

[0031] As shown in Fig. 4, the lifting device 40 is attached to a vertical frame 41 and has a lifting mechanism 44 that raises and lowers the vertical frame 41 relative to the front support column 22. In this embodiment, two lifting mechanisms 44 are arranged side by side in the vertical direction relative to the vertical frame 41. Note that Fig. 4 only shows the vertical frame 41, the lifting mechanisms 44, and a clamping mechanism 50 (described later) that constitute the lifting device 40.

[0032] (Front roller 46, rear roller 47) As shown in FIGS. 3 and 6, the lifting device 40 includes a front roller 46 and a rear roller 47 that guide the vertical frame 41 as it moves up and down.

[0033] The front roller 46 and the rear roller 47 are provided so as to be slidable on the front rail 30 and the rear rail 31, respectively. A plurality of front rollers 46 are provided at intervals in the vertical direction.

[0034] A plurality of rear rollers 47 are provided at intervals in the vertical direction. In this embodiment, a total of three front roller sets 48, including two upper and two lower front rollers 46, are attached to mounting portions fixed to the front surface of the vertical frame 41. One front roller set 48 is provided at the upper end of the vertical frame 41. Two front roller sets 48 are provided at the lower end of the vertical frame 41, lined up one above the other.

[0035] In this embodiment, a total of two rear roller sets 49 including two upper and lower rear rollers 47 are attached to attachment portions fixed to the rear surface of the vertical frame 41. One rear roller set 49 is provided at the upper end of the vertical frame 41. Another rear roller set 49 is provided at the lower end of the vertical frame 41.

[0036] 8, a pair of flanges 47a are provided on both axial ends of the rear roller 47, protruding toward the outer periphery of the rear roller 47 and engaging with the side surfaces of the rear rail 31. Although not shown, a pair of flanges similar to those on the rear roller 47 are also provided on both widthwise ends of the front roller 46.

[0037] <Details of the front rail 30, rear rail 31, inner rail 32, and outer rail 33> 7 and 9 to 11, a first rail 34 extending in the vertical direction and having an L-shaped cross section is fixed to the front and outer corners in the width direction of the front support column 22. A flat front rail 30 and an outer rail 33 are integrally formed on the front surface and outer surface in the width direction of the first rail 34, respectively (see FIGS. 7 and 9).

[0038] As shown in FIG. 10, the first rail 34 has a rail main body 34a and a rail segment 34c. The rail main body 34a extends in the vertical direction and has a notch 34b where a portion of the rail main body 34a is cut away in the vertical direction. The rail main body 34a is fixed non-detachably to the front support column 22. In this embodiment, the rail main body 34a is fixed to the front support column 22 by welding.

[0039] The rail segment 34c is detachably fixed at the cutout 34b to the front support column 22. In this embodiment, the rail segment 34c is detachably fixed to the front support column 22 via a bolt (not shown).

[0040] 7 to 10, a second rail 35 extending in the vertical direction and having an L-shaped cross section is fixed to the rear, outer corner in the width direction of the front support column 22. A flat plate-shaped rear rail 31 is integrally formed on the rear surface of second rail 35 (see FIG. 8).

[0041] As shown in FIG. 10, the second rail 35 has a rail main body 35a and a rail segment 35c. Similar to the rail main body 34a of the first rail 34, the rail main body 35a extends in the vertical direction and has a notch 35b formed by cutting out a portion of the rail main body 35a in the vertical direction. The rail main body 35a is fixed to the front support column 22 in an undetachable manner. In this embodiment, the rail main body 35a is fixed to the front support column 22 by welding.

[0042] The rail segment 35c is detachably fixed at the cutout 35b to the front support column 22. In this embodiment, the rail segment 35c is detachably fixed to the front support column 22 via a bolt (not shown).

[0043] 7, 9, and 10, a third rail 36 extending in the vertical direction and having an L-shaped cross section is fixed to the front, widthwise inner corner of the front support column 22. A flat inner rail 32 is integrally formed on the inner widthwise surface of the third rail 36.

[0044] As shown in FIG. 10, third rail 36 differs in configuration from first rail 34 and second rail 35 in that it does not have any cutouts or rail segments. The third rail 36 is fixed non-detachably to the front support column 22. In this embodiment, the third rail 36 is fixed to the front support column 22 by welding.

[0045] As shown in FIG. 10, the first rail 34 has two notches 34b, and the second rail 35 has two notches 35b, which are spaced apart in the vertical direction. 11, when the lifting device 40 (vertical frame 41) is in the lowest position, the upper cutout 34b is provided above the upper one of the three front roller sets 48. When the lifting device 40 (vertical frame 41) is in the lowest position, the lower cutout 34b is provided above the lower two of the three front roller sets 48.

[0046] 12, the vertical length of the upper cutout 34b is slightly greater than the vertical length of the upper front roller set 48. The vertical length of the lower cutout 34b is slightly greater than the vertical length of the two lower front roller sets 48.

[0047] The position and vertical length of cutout portion 35b of second rail 35 are the same as those of cutout portion 34b of first rail 34. The lifting device 40 is configured to be removable from the front support 22 by moving the front roller 46 and the rear roller 47 outward in the width direction through the cutout portion 34b when the rail segments 34c, 35c are removed.

[0048] (Pinch mechanism 50) 3 to 5 and 9, the lifting device 40 has a clamping mechanism 50 that clamps the front support column 22 in the width direction. A plurality of clamping mechanisms 50 are provided at intervals from one another in the vertical direction. In this embodiment, two clamping mechanisms 50 are provided, one on top and one on bottom, on one front support column 22. That is, the lifting device 40 has a total of four clamping mechanisms 50.

[0049] As shown in FIG. 5, the clamping mechanism 50 includes an inner roller 52 and an outer roller 53 that are slidably provided on the inner rail 32 and the outer rail 33, respectively. As shown in Figures 3 to 5 and 9, the clamping mechanism 50 has a support arm 51 that is connected to the vertical frame 41 and supports an inner roller 52. The support arm 51 extends along the width direction. The support arm 51 is configured to be detachable from the vertical frame 41. The support arm 51 is detachably fixed to the front surface of the vertical frame 41 by a bolt (not shown).

[0050] An inner roller 52 is rotatably supported by the tip of the support arm 51. In this embodiment, one inner roller 52 is provided above and one below the tip of the support arm 51.

[0051] As shown in FIGS. 5, 6 and 9, the outer rollers 53 are in sliding contact with the outer rails 33 through openings that open on the inner side surfaces of the vertical frame 41 in the width direction. 5 and 6, in the upper clamping mechanism 50, an outer roller 53 is provided below the upper support arm 51. In this embodiment, two outer rollers 53 are provided spaced apart from each other in the vertical direction.

[0052] In the lower clamping mechanism 50, an outer roller 53 is provided above the lower support arm 51. In this embodiment, two outer rollers 53 are provided spaced apart from each other in the vertical direction.

[0053] Next, the procedure for removing the lifting device 40 from the front support column 22 will be described with reference to FIGS. 11, the lifting device 40 is lowered to the lowest position. In this state, the members of the lifting device 40 (such as the upper horizontal frame 42 and the lower horizontal frame 43) other than the vertical frame 41, the lifting mechanism 44, the front roller set 48, the rear roller set 49, and the clamping mechanism 50 are removed.

[0054] Next, the rail segments 34c and 35c are removed from the front support 22. Also, the support arm 51 of the clamping mechanism 50 is removed from the vertical frame 41. Next, as shown in FIG. 12, the lifting mechanism 44 is raised until the front roller set 48 (front rollers 46) and the rear roller set 49 (rear rollers 47) are at the height of the corresponding cutouts 34b, 35b, respectively.

[0055] Then, the front roller 46 and the rear roller 47 are moved outward in the width direction through the cutouts 34b and 35b, whereby the lifting device 40 is removed from the front support column 22. Next, the effects of this embodiment will be described.

[0056] (1) With the rail segments 34c and 35c removed from the front support 22 of the guide tower 21, the lifting device 40 can be removed from the front support 22 by moving the front rollers 46 and the rear rollers 47 outward in the width direction through the cutouts 34b and 35b. This allows the lifting device 40 to be easily removed from the front support 22 without having to pull it out upward.

[0057] (2) The rail segments 34c and 35c are detachably fixed to the front support 22 via bolts. With this configuration, the rail segments 34c, 35c can be easily attached to and detached from the front support 22 by attaching and detaching the bolts.

[0058] (3) The front roller set 48 has two front rollers 46. Therefore, compared to when there is one front roller 46, the load acting on one front roller 46 can be dispersed, thereby making it possible to reduce the size of the front roller 46. The same is true for the rear roller set 49.

[0059] (4) The lifting device 40 includes an inner roller 52 and an outer roller 53 that are slidably mounted on the inner rail 32 and the outer rail 33, respectively, and has a clamping mechanism 50 that clamps the front support 22 in the width direction.

[0060] With this configuration, the front support column 22 is clamped by the inner roller 52 and the outer roller 53 of the clamping mechanism 50 so as to be slidable in the width direction. Therefore, the vertical frame 41 can be prevented from separating from the front support column 22 outward in the width direction.

[0061] (5) A plurality of clamping mechanisms 50 are provided at intervals in the vertical direction. This configuration prevents the vertical frame 41 from moving outward in the width direction from the front support columns 22 at multiple locations in the up-down direction. Therefore, the vertical frame 41 can be effectively prevented from moving outward in the width direction from the front support columns 22.

[0062] (6) The support arm 51 that supports the inner roller 52 is connected to the front surface of the vertical frame 41. Therefore, the inner roller 52 can be easily set at a position away from the vertical frame 41.

[0063] (7) Because the lifting device 40 includes the clamping mechanism 50 that supports the inner roller 52, the following inconvenience occurs when removing the lifting device 40 from the guide tower 21. That is, the vertical frame 41 cannot be moved outward in the width direction relative to the front support column 22 due to interference from the inner roller 52. Therefore, the lifting device 40 must be pulled upward relative to the front support column 22.

[0064] In this regard, with the above-described configuration, the support arms 51 that support the inner rollers 52 can be removed from the vertical frames 41, and therefore the lifting device 40 can be removed from the front support columns 22 by moving the vertical frames 41 outward in the width direction relative to the guide tower 21. Therefore, the lifting device 40 can be easily removed from the guide tower 21.

[0065] (8) Providing the clamping mechanism 50 can prevent the vertical frame 41 from moving outward in the width direction from the front support column 22. This can prevent wear caused by contact of the front rollers 46 with the front rail 30, wear caused by contact of the rear rollers 47 with the rear rail 31, and wear of the bearings (not shown) that rotatably support the front rollers 46 and the rear rollers 47.

[0066] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0067] The clamping mechanism 50 is not limited to one having a support arm 51. In short, it is sufficient if it includes an inner roller 52 and an outer roller 53 that are slidably mounted on the inner rail 32 and the outer rail 33, respectively, and clamps the front support 22 in the width direction.

[0068] Three or more clamping mechanisms 50 may be provided at intervals in the vertical direction for one vertical frame 41. Also, one clamping mechanism 50 may be provided for one vertical frame 41.

[0069] The clamping mechanism 50 may be omitted. In the above embodiment, the lifting device 40 is illustrated as having three front roller sets 48, but the number of front roller sets 48 may be changed as needed, for example, to the same number as the rear roller sets 49.

[0070] In the above embodiment, the lifting device 40 is provided with two rear roller sets 49, but the number of rear roller sets 49 may be changed as needed, for example, to the same number as the front roller sets 48.

[0071] The front roller set 48 is not limited to having two front rollers 46, but may have one front roller 46. Furthermore, the rear roller set 49 is not limited to having two rear rollers 47, but may have one rear roller 47.

[0072] The manner in which the rail segments 34c, 35c are fixed to the front support 22 is not limited to using bolts, but may also be using pins, for example. [Explanation of symbols]

[0073] 10...wind turbine generator, 11...tower, 11a...bottom tower, 11b to 11d...middle tower, 11e...top tower, 12...nacelle, 13...rotor, 14...hub, 14a to 14c...blade mounting port, 15a to 15c...blade, 20...lift-up device, 21...guide tower, 22...front support, 22a, 22b...side, 22c...front, 22d...rear, 23...rear support, 24 to 26...beam, 27...base, 28...pulling rail, 29...staying, 30...front rail, 31...rear rail, 32...inner rail, 33...outer rail, 34 ...First rail, 34a...rail main body, 34b...cutout portion, 34c...rail segment, 35...second rail, 35a...rail main body, 35b...cutout portion, 35c...rail segment, 36...third rail, 40...lifting device, 41...vertical frame, 42...upper horizontal frame, 43...lower horizontal frame, 44...lifting mechanism, 45...guide roller, 46...front roller, 47...rear roller, 47a...flange, 48...front roller set, 49...rear roller set, 50...clamping mechanism, 51...support arm, 52...inner roller, 53...outer roller, 60...mounting stand, 70...hanging jig.

Claims

1. A lift-up device comprising: a guide tower provided around a tower of a wind power generator; and a lifting device supported by the guide tower and configured to be able to move up and down along the guide tower, When a direction perpendicular to the up-down direction is defined as a front-rear direction, and a direction perpendicular to both the up-down direction and the front-rear direction is defined as a width direction, The guide tower is A pair of support columns arranged at an interval in the width direction; a front rail and a rear rail fixed to the front and rear surfaces of the support column, respectively; The lifting device is a pair of vertical frames arranged adjacent to each other on the outer sides of the pair of support columns in the width direction; an elevating mechanism attached to the vertical frame and configured to elevate and lower the vertical frame relative to the support column; a front roller and a rear roller that engage with the front rail and the rear rail, respectively, and guide the lifting mechanism in a vertical movement; The front rail and the rear rail are a rail body extending in the vertical direction and having a cutout portion in which a portion in the vertical direction is cut out; a rail segment detachably fixed to the support at the cutout portion, The lifting device is configured to be removable from the support by moving the front rollers and the rear rollers outward in the width direction through the cutouts when the rail segments are removed. Lift-up device.

2. The rail segments are detachably fixed to the support posts via bolts. The lift-up device according to claim 1 .

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