JP5715832B2 - Maintenance method for tower structures - Google Patents

Description

  The present invention relates to a maintenance method for a tower-like structure for maintenance and inspection of the surface of an existing tower or a structure installed on the upper end of the existing tower. Preferably, a tower-like structure for replacing a faulty part for maintenance inspection of a wind power generation facility consisting of a nacelle and a blade that can be swung freely at the upper end of an existing tower via a yaw ring or the like. The maintenance method or the maintenance such as painting of the surface of the existing tower can be employed.

Conventionally, in order to assemble a wind power generation facility, it has been assembled using a huge crane device that is higher than the wind power generation facility. However, in order to assemble a huge crane device, it requires a great deal of cost and construction time. It was an economy. Further, it is difficult to secure a scaffold in a mountainous area or the like, and it has been necessary to construct a temporary road or the like, or the crane apparatus itself cannot be used depending on the terrain.
Therefore, a method for constructing a tower-like structure and an apparatus therefor have been proposed by the applicant of the present invention as exemplified in Patent Document 1 below.
On the other hand, as a simple repair method and repair device for an existing wind power generation device, a repair method and a repair device for a wind power generation tower and the like exemplified in Patent Document 2 below have also been proposed.

Japanese Patent No. 3732414 (refer to the claims) Japanese Patent Laying-Open No. 2005-002875 (see abstract)

  The construction method and apparatus of the tower-like structure as the first conventional example disclosed in Patent Document 1 will be described with reference to FIG. 9. FIG. ) (B) As shown in (C), in the method of connecting a plurality of blocked tower-like structures 101a, 101b, 101c to construct a tower-like structure, the first block tower is formed at the base. A step of erecting the structure 101a, and assembling each of the four guide towers 102a and 102b up and down so as to surround the first block tower structure 101a, between the first block tower structure 101a and the guide tower 102a In the step of providing the support member 106, the guide tower 102a assembled so as to surround the first block tower structure 101a is substantially the same height as the first block tower structure 101a. The first guide tower 102a provided on the lower side and the second guide tower 102b provided on the upper side thereof, the second guide tower 102b provided on the upper side move the raised block structure in the lateral direction. Are open to carry in,

  The telescopic mechanism (as shown in FIGS. 9D, 9E, and 9F) on the guide tower 121 includes upper and lower pins 147 and 104b that engage and disengage with the upper and lower engaging holes 120a to 120e of the guide tower 121. The lift-up device 104 is moved up and down with respect to the guide tower 121) and the block tower structure holding and lateral movement mechanism is provided. A step of attaching the lift-up device 104, and a block tower body which is lifted along the guide tower by holding the block tower structure in the lateral movement mechanism of the lift-up device 104 and lifting the telescopic mechanism by the intermittent insect action. The structure 101b is moved in the horizontal direction by the horizontal movement mechanism and connected to the first block tower structure 101a. It is.

  Even if it is in a mountainous area that is not suitable for assembling a huge crane device in such a construction method of a tower-like structure, a wind-up method using a stable guide tower can be used without securing a vast scaffold. It is possible to construct a tower-like structure at a low cost in a short period of time without being affected by such influences.

  A repair method and a repair device such as a wind power generation tower as a second conventional example disclosed in Patent Document 2 will be described with reference to FIG. An operation step of winding and fixing the rail mounting band 220, a step of installing a fixed lifting rail 210 between the pair of rail mounting bands 220, and a lifting drive device on the lifting rail 210 On the work platform 230, the work process of assembling the work platform 230 with the attached work, the work process of sequentially adding a plurality of lifting rails 210 toward the upper end of the tower using the work platform 230, And a process of performing repair work such as painting. The lifting rails 210 may be arranged in parallel at a plurality of locations in the outer peripheral direction of the tower 201.

  With such repair methods and equipment for wind power generation towers, the cylindrical large towers such as wind power generation towers are periodically repainted, and the variable pitch mechanism at the base of the blades of power generation wind turbines It became possible to reduce the cost and time required for repair and replacement work.

  However, in the construction method of the tower-like structure of the first conventional example, the lift-up method using a stable guide column by a simple construction method can be realized in a short period of time without using a huge crane device. Although it is possible to construct a tower-like structure, the guide struts will be removed after construction of the tower-like structure is completed, so in wind power generators, etc., it is installed at the upper end of the existing tower. It was only possible to replace parts with a crane device that could be suspended by about 1 ton installed in the nacelle. Therefore, in order to maintain and replace heavy objects such as transmission devices and blades in the nacelle, it has been necessary to install and construct guide struts around the existing tower again. For this reason, it is necessary to lay temporary roads such as iron plates again in mountainous areas and the like, and there is a risk that the cost of installing relatively expensive guide struts at four locations around the existing tower may increase.

  Further, in the repair method and the repair device such as the wind power generation tower of the second conventional example, the work platform 230 with a lift drive device is simply assembled to the lift rail 210 installed on the outer peripheral surface of the support column 201. Therefore, although it is suitable for minor maintenance and inspection such as painting, it is completely unsuitable for moving up and down to the ground to maintain and replace heavy objects such as transmission devices and blades in the nacelle. It was.

  Therefore, the present invention solves the problems of the conventional tower-like structure construction method, the wind power generation tower repair method and the repair device, etc., and has high strength even with a simple structure using the minimum necessary members. An object of the present invention is to provide a maintenance method for a tower-like structure that allows lifting and lowering of heavy components.

  Therefore, the present invention provides a tower-like structure maintenance method for maintaining and inspecting a structure installed on the surface of an existing tower or an upper end portion of the existing tower, and a pair of the tower-like structures assembled and connected to the existing tower substantially in parallel. A lifting frame is installed on the maintenance column so as to be movable up and down, and a maintenance inspection of the surface of the existing tower or the structure installed on the upper end of the existing tower is performed using the lifting frame. Further, the present invention provides a lift frame for a maintenance support by a lift-up device that operates like a scale by a combination of upper and lower pins engaged and disengaged with respect to the assembled maintenance support and a jack for extending and contracting between the pins. It is configured to move up and down. In the invention, it is preferable that the upper part of the maintenance column is assembled by a member that is lifted by the lifting frame. Further, according to the present invention, the maintenance column and the existing tower are a belt stay spanned around the existing tower at a plurality of parts in the vertical direction, and a tension member interposed between the maintenance column and the existing tower. It is connected by these. Further, the present invention is characterized in that the elevating frame is guided by rollers or the like at least at two portions separated from each other vertically with respect to the maintenance column. Further, the present invention uses a portal frame or a carriage that is slidably installed on the lifting frame, disassembles the structure installed at the upper end of the existing tower, moves it to an appropriate position of the lifting frame, maintenance inspection, etc. It is characterized by being raised and lowered between the ground and the like. Further, the present invention is characterized in that after the assembly of the maintenance column is completed, a lift device for raising and lowering the worker is installed at or near the maintenance column, and these are used as means for solving the problems.

According to the present invention, in the maintenance method for a tower-like structure for the maintenance inspection of the structure installed on the surface of the existing tower or the upper end of the existing tower, which is a constituent requirement according to claim 1, A lifting frame is installed on a pair of maintenance columns that are assembled by connecting them almost in parallel to the tower, and the portal frame or carriage that is slidably installed on the lifting frame is used to attach the lifting frame to the upper end of the existing tower. Disassemble the installed structure, move it to the appropriate position of the lifting frame, lift it up and down with the ground for maintenance and inspection, etc., and use the lifting frame on the surface of the existing tower or the upper end of the existing tower By performing maintenance and inspection of the installed structure, even if it is a simple structure using the minimum necessary members, it can be connected using the predetermined strength of the existing tower. By a pair of maintenance strut, maintenance method tower-like structure that enables vertical movement of the weight parts of a stable strength is provided. In addition, even disassembled parts that are relatively heavy can be loaded onto the lifting frame with simple work using a portal frame or carriage, so that disassembled parts can be safely maintained, inspected, or replaced on the ground. It becomes possible to do.

In addition, the lifting frame, which is a constituent element of claim 2, is a lift that operates like a scale by a combination of upper and lower pins that are engaged and disengaged with respect to the assembled maintenance column and a jack that expands and contracts between these pins. When it is configured to move up and down with respect to the maintenance column by the lifting device, even if it is a simple structure and a small capacity lift-up device, it is backed up by the strength of the existing tower and the assembled maintenance column is lifted up As a part of this, it is possible to reliably raise and lower the elevating frame so that the loaded heavy parts and the like can be raised and lowered stably.
Furthermore, when the assembly of the upper part of the maintenance column, which is a constituent requirement according to claim 3, is performed by a member lifted by the lifting frame, the already assembled maintenance column is used as a part of the lift-up device. Since only the lightweight upper member can be sequentially transported and assembled by the lifting frame, the maintenance column can be assembled by a light lift-up method.

Furthermore, the maintenance strut and the existing tower, which are constituent elements according to claim 4, include a belt stay spanned around the existing tower at a plurality of vertical portions, a maintenance strut and the existing tower. When connected by a strut member interposed between them, a simple member such as a belt stay and a strut member makes it easy to maintain the maintenance strut parallel to the existing tower while assembling the maintenance strut. Can be connected firmly.
In addition, when the lifting frame is guided by rollers or the like at least at two locations separated from each other in the vertical direction with respect to the maintenance column, It is possible to reliably maintain the horizontality of the lifting frames that intersect, and to reliably receive the moment caused by the heavy load loaded at the biased position of the lifting frames.

Further, the configuration requirements of claim 6, before after assembling complete texture Maintenance strut, when installing a lifting device for personnel lifting to the maintenance strut or near the worker for the work It can be moved up and down quickly.

It is the whole side view and front view which show the maintenance method of the tower-like structure of this invention. It is principal part sectional drawing and connection component figure which show the connection state of the existing tower and a maintenance support | pillar in the maintenance method of the tower-shaped structure of this invention. FIG. 6 is a cross-sectional view of a main part showing a connection state between a somewhat larger diameter existing tower and a maintenance column. FIG. 5 is an overall side view showing a tower-like structure maintenance method applied to the wind turbine generator, and shows a state in which the lifting frame moves up and down on the maintenance column. It is a principal part expanded side view which shows the state which suspended the nacelle using the portal frame | frame for the yawing exchange in a wind power generator. It is a principal part expanded side view which shows the process of the yawing replacement | exchange using the trolley | bogie in a wind power generator. It is a principal part expanded side view which shows the braid | blade removal process using the portal frame in a wind power generator. It is a principal part expanded side view which shows the blade load handling process using the crane vehicle etc. near the ground in a wind power generator. It is explanatory drawing of the construction method of the tower-like structure of a 1st prior art example, and its apparatus. It is explanatory drawing of the simple repair method and repair apparatus of the wind power generator of a 2nd prior art example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out a maintenance method for a tower structure according to the invention will be described with reference to the drawings. The tower-like structure maintenance method of the present invention is, as shown in FIG. 1, a tower-like structure maintenance method for maintenance inspection of the structure installed on the surface of the existing tower 1 or the upper end of the existing tower 1. The lift frame 5 is installed on a pair of maintenance columns 2A, 2B that are assembled by being connected to the existing tower 1 substantially in parallel, and the portal frame 6 installed on the lift frame 5 is slidable. Using the carriage 7, the structure installed at the upper end of the existing tower 1 is disassembled and moved to an appropriate position of the elevating frame 5, and is raised and lowered between the ground and the like for maintenance and inspection. The maintenance inspection of the structure installed in the surface of the existing tower 1 or the upper end part of this existing tower 1 is performed using this.

  FIG. 1 is an overall side view and a front view showing one embodiment of the tower structure maintenance method of the present invention. In the example shown in the figure, when maintenance / inspection or replacement of the in-service parts of the wind power generator in service is required, the existing tower 1 of the wind power generator is used to slightly increase the one side of the existing tower 1. A pair of first and second maintenance columns 2A, 2B and a maintenance column 2 constructed by connecting them with connecting beams 2C at a number of locations above and below as a minimum member at intervals. It is. The existing tower 1 and the maintenance column 2 are connected to each other by belt stays (in the example shown, five places of stayings 1 to 5) 3 and a projecting member 4 (see FIG. 2 described later) at a plurality of positions above and below. .

  A pair of first and second maintenance struts 2A and 2B and maintenance struts 2 formed by connecting them with connecting beams 2C at a plurality of upper and lower portions are tower-like structures described in the first of FIG. It is assembled in the same way as the guide tower construction method. Although not described in detail, for example, the parts and members for each block defined by the connecting beam 2C as shown in FIG. 1B are preferably placed on a lifting frame 5 that moves up and down with respect to the maintenance column 2. Are assembled sequentially. A number of holes or grooves (corresponding to the engagement holes 120a-e in FIG. 9) are provided on the left and right side surfaces of the first and second maintenance columns 2A, 2B in the front view of FIG. 1 (B). The pins (corresponding to the pins 147 and 104b in FIG. 9) that appear and disappear in these holes or grooves and are selectively engaged with each other are installed on the cylinder and the piston that extend and retract from each other. Lifting up of the lifting frame 5 with respect to the maintenance column 2 by holes and grooves on both side surfaces of the maintenance column 2A, 2B, and a cylinder and a piston that are installed on a lifting frame 5 provided with a pin for engaging and disengaging them. The device is configured.

  As shown in the side view of FIG. 1A, the elevating frame 5 is disposed substantially horizontally so as to intersect the maintenance column 2 and is guided vertically on both side surfaces of the maintenance columns 2A and 2B. A vertical frame 5D is provided. A reinforcing diagonal frame 5E is provided between the horizontal portion of the elevating frame 5 and the vertical frame 5D. The horizontal portion of the elevating frame 5 disposed on both side surfaces of the maintenance columns 2A and 2B and the vertical frame 5D are connected by a connecting beam 5C. The ends of the horizontal portion of the elevating frame 5 are also connected by a connecting beam 5C. Between the vertical frame 5D of the elevating frame 5 and the front and rear surfaces of the maintenance posts 2A and 2B (left and right in FIG. 1A), guide rollers 17 are installed at a sufficiently isolated vertical position. Thus, the level of the elevating frame 5 intersecting the maintenance column 2 can be reliably maintained, and the moment caused by the heavy load loaded on the position where the elevating frame 5 is biased can be reliably received.

  On the upper surface of the horizontal portion of the elevating frame 5, a portal frame 6 or a cart 8 (sub-carts 8A and 8B) is slidably installed. Although not shown, the slide rails for the portal frame 6 and the carriage 8 in the lift frame 5 are laid independently of each other. For example, in FIG. 1B, slide rails for the slide carriage 7 installed at the lower part of the gate frame 6 are laid on the upper surfaces of the left and right sides. A slide rail is laid. When the lifting / lowering frame 5 is positioned in the middle of the lifting / lowering of the maintenance column, the maintenance columns 2A and 2B obstruct the movement of the upper surface of the horizontal part of the lifting / lowering frame 5 back and forth (left and right direction in FIG. 1A). However, as shown in FIGS. 5 to 8 described later, at the upper end position of the maintenance column 2, the slide carriage 7 and the sub carriages 8A and 8B of the portal frame 6 are moved back and forth and disassembled. Parts can be moved. The portal frame 6 is also composed of a first portal frame 6A, a second portal frame 6B, and a connecting beam 6C connecting them.

  Further, after the assembly of the maintenance column 2 is completed, although not shown, a lift device for lifting and lowering the worker of an appropriate type and structure is installed in the maintenance column 2 and its vicinity. Thereby, the worker can quickly go up and down for work. For example, by a lift lift for workers installed on a cylinder and a piston that extend and retract a plurality of pins that selectively engage and disengage with a large number of holes or grooves on the left and right side surfaces of the first and second maintenance columns 2A and 2B. , Using a large number of holes or grooves provided on the left and right side surfaces of the first and second maintenance columns 2A, 2B, and the pins that are engaged and disengaged to the endless track belt. You may comprise the raising / lowering lift for workers which drives what is protrudingly provided on the surface.

  FIG. 2 is a cross-sectional view at the staying (for example, No. 1) position in FIG. 1 (A), and shows a main part showing a connection state between the existing tower and the maintenance column in the tower structure maintenance method of the present invention. It is sectional drawing and a connection component figure. The maintenance strut 2 and the existing tower 1 are a belt stay 3 spanned around the existing tower 1 at a plurality of vertical portions, and a tension member interposed between the maintenance strut 2 and the existing tower 1. 4 is connected. As shown in FIG. 2 (A), the tension member 4 is attached to a fixed beam 4E fixed to a pair of first and second maintenance columns 2A, 2B connected by a connection beam 2C by an appropriate fixing tool. The first projecting member 4A and the second projecting member 4B are installed by the diagonal member 4C and the supplementary beam 4D.

  Both end portions of the band stay 3 spanned around the existing tower 1 are connected to the projecting members 4A and 4B by a band stay holder 13 and a length adjuster 14, respectively. The belt stay 3 is preferably made of a material such as nylon that does not damage the surroundings of the existing tower 1, but does not hinder the use of a steel belt or a chain. In that case, a cushioning material may be interposed between the belt stay 3 and the periphery of the existing tower 1. On the diagonal member 4C of each of the projecting members 4A and 4B, a contact 15 that is in pressure contact with the peripheral surface of the existing tower 1 is disposed so as to be freely advanced and retracted by an adjusting tool 16. By adjusting the tension with the adjusting tool 14 for the projecting member 4 of the belt stay 3 spanned around the existing tower 1 and adjusting the advance / retreat by the adjusting tool 16 of the contact 15 that is in pressure contact with the peripheral surface of the existing tower 1, The parallelism, that is, the gap adjustment between the tower 1 and the maintenance column 2 is appropriately performed. Thus, with the simple members such as the belt stay 3 and the projecting member 4, the maintenance column 2 can be easily and securely connected to the existing tower 1 while being maintained while the maintenance column 2 is assembled.

  FIG. 3 is a cross-sectional view of an essential part showing a connection state between the existing tower 1 having a somewhat larger diameter and the maintenance column. In this example, a pair of maintenance columns 2A, 2B standing along a large-diameter existing tower 1 are arranged on an extension of a tangential line of a substantially parallel belt stay 3 spanning the existing tower 1. Established. Therefore, although the pair of projecting members 4A and 4B are disposed adjacent to each other in the example of FIG. 2, the reinforcing beam 4D is omitted in this example.

  FIG. 4 is an overall side view showing a tower-like structure maintenance method applied to the wind turbine generator, and shows a state in which the lifting frame moves up and down on the maintenance column. A nacelle 9 composed of a transmission device or the like is installed at the upper end of the existing tower 1 via a yaw ring 11 so as to be swingable. A plurality of blades 10 are rotatably supported on the front surface of the nacelle 9. When the assembly of the maintenance column 2 is completed, as described above, the pistons and cylinders installed in the elevating frame 5 are expanded and contracted, and pins provided so as to be able to protrude and retract are connected to both side surfaces of the maintenance columns 2A and 2B. The lifting frame 5 can be moved up and down with respect to the maintenance column 2 by a scale-up operation by a lift-up device selectively engaged with and disengaged from the holes or grooves.

  FIG. 5 is an enlarged side view of a main part showing a state in which a nacelle is suspended using a portal frame for yawing replacement in a wind turbine generator. The gate frame 6 is moved to the center of gravity of the nacelle 9 by the slide carriage 7 on the upper surface of the horizontal portion of the elevating frame 5 and fixed at that position. Next, the nacelle 9 is lifted by the suspension cable 6 </ b> C using the connecting beam 6 </ b> C in the portal frame 6. In the illustrated example, the yaw ring 11 that supports the nacelle 9 on the upper end of the existing tower 1 is fixed to the upper end of the existing tower 1. In FIG. 5, the old yaw ring 11A to be replaced is fixed to the upper end of the existing tower 1, and the new replace yaw ring 11B is suspended from the sub-cart 8B. On the right side of the horizontal portion of the elevating frame 5, a sub-trolley 8A that removes and moves the old yawing 11A stands by. In the case where the yaw ring 11 is attached to the lower part of the nacelle 9, the sub carts 8 </ b> A and 8 </ b> B are subjected to the attaching and detaching work of the yaw rings 11 </ b> A and 11 </ b> B at the attachment position of the lower part of the nacelle 9.

  FIG. 6 is an enlarged side view of a main part showing a yawing exchanging process using a carriage in the wind turbine generator. As shown in FIG. 6 (A), the sub-carriage 8A is moved from the right side and positioned on the upper part of the old yaw ring 11A to be replaced, and then the old yaw ring 11A is removed with a screw jack or the like and moved to the right side to move to the ground. Wait for descent transport to. Then. As shown in FIG. 6 (B), the sub-cart 8B in which the new replacement yaw ring 11B is suspended is moved to a predetermined position from the left side of the drawing, and is installed at the upper end of the existing tower 1 to complete the exchange. Then, as shown in FIG. 6C, the nacelle 9 is suspended and installed at the upper end of the existing tower 1 through a new replacement yaw ring 11B so as to be swingable. Thereafter, the old yawing 11A is transported down to the ground by the elevating frame 5 and discarded or repaired.

  FIG. 7 is an enlarged side view of an essential part showing a blade removing process using a portal frame in the wind turbine generator. When one of the plurality of blades 10 is damaged, as shown in FIG. 7A, the lifting frame 5 is raised, and then the upper end of the existing tower 1 is shown in FIG. As described above, the slide carriage 7 of the portal frame 6 is moved to the vicinity of the shaft support portions of the nacelle 9 and the blade 10 on the upper surface of the horizontal portion of the elevating frame 5. At this position, the blade 10 is suspended by the suspension cable 12 using the connecting beam 6 </ b> C of the portal frame 6, and the axial support of the nacelle 9 and the blade 10 is released. Then, as shown in FIG. 7C, the portal frame 6 is moved to the right side of the lifting frame 5 together with the blade 10 by the slide carriage 7 and is put on standby.

  FIG. 8 is an enlarged side view of a main part showing a blade load handling process using a crane truck or the like near the ground in the wind power generator. As shown in FIG. 8A, when the elevating frame 5 reaches the vicinity of the ground while the blade 10 is suspended from the portal frame 6, the blade 10 is suspended by a 20t crane vehicle or a 100t crane vehicle waiting on the ground. Next, as shown in FIG. 8 (B), the blade 10 is lifted by a 20t crane truck or a 100t crane truck and lowered to the ground for repair or replacement.

  The embodiment of the present invention has been described above, but within the scope of the present invention, the shape of the existing tower (in the illustrated example, it is a circular section, but does not exclude an elliptical section or a rectangular section), Type, maintenance mode (in addition to maintenance by lowering the parts of the upper end of the existing tower and dropping it to the ground, painting around the existing tower and repair maintenance of the welded parts are also included), upper end of the existing tower The form of the structure installed in the wind turbine (preferably applied to nacelle, yawing or blade maintenance in wind power generators, but other parts installed at the upper end of the tower-like structure requiring maintenance and inspection, etc. (It can also be applied to maintenance), lift-up form of the lifting frame with respect to the maintenance column (in the embodiment, it is related to the hole or groove on the side of the maintenance column) In addition to constituting a lift-up device that operates like a scale by combining the upper and lower pins and jacks that expand and contract between the pins, an appropriate type of lift-up device can be constructed), the shape and type of the lifting frame, and Direction of hole or groove forming surface in the maintenance column constituting the lift-up device (not limited to the side surface of the maintenance column in the embodiment, it may be the front surface of the maintenance column), connection form of the maintenance column and the existing tower (In addition to what is connected by the belt stay spanned around the existing tower of the embodiment and the strut member interposed between the maintenance column and the existing tower, between the maintenance column and the existing tower Belt straps spanned around both the installed strut members and the maintenance struts and the existing tower May be composed of a chromatography), the other guided by at least roller or the like at sequestered two sites above and below the lift frame for maintenance struts may be guided by more than two. As appropriate for the sliding form of the portal frame or carriage in the lifting frame, the shape and form of the portal frame or carriage, the suspension form of the disassembled parts in the portal frame, the installation form of the lift device for lifting the worker to the maintenance column, etc. Can be selected. In addition, the specifications described in the examples are merely examples in all respects and should not be interpreted in a limited manner.

  The maintenance method of the tower-like structure of the present invention is preferably a failure due to maintenance and inspection of a wind power generation facility consisting of a nacelle and a blade that is swingably installed at the upper end of an existing tower via a yaw ring or the like. Although it is applied to the maintenance method of the tower-like structure for exchanging the parts, it can also be adopted for maintenance such as painting of the surface of the existing tower. Furthermore, the present invention can also be applied to maintenance of parts installed at the upper end of a tower-like structure that requires other maintenance and inspection.

DESCRIPTION OF SYMBOLS 1 Existing tower 2 Maintenance support | pillar 2A 1st maintenance support | pillar 2B 2nd maintenance support | pillar 2C Connection beam 5 Lifting frame 5A 1st frame 5B 2nd frame 5C Connection beam 5D Vertical frame 5E Diagonal frame 6 Portal frame 6A 1st portal frame 6B Second portal frame 6C Connecting beam 7 Slide cart 8 Sub-cart 17 Guide roller

Claims (6)

In a maintenance method for a tower-like structure for maintenance and inspection of the surface of an existing tower or a structure installed on the upper end of the existing tower, a lifting frame is attached to a pair of maintenance struts that are assembled and connected substantially parallel to the existing tower. , And using a portal frame or carriage installed slidably on the lifting frame, disassemble the structure installed on the upper end of the existing tower and move it to the appropriate position of the lifting frame, A tower-like structure characterized in that it is moved up and down between the ground and the like for maintenance and inspection, and maintenance and inspection is performed on the surface of the existing tower or the structure installed on the upper end of the existing tower using the lifting frame. Maintenance method of things. The lifting frame is lifted and lowered with respect to the maintenance column by a lift-up device that operates like a scale by combining the upper and lower pins that engage and disengage with the assembled maintenance column and the jack that expands and contracts between these pins. The tower-like structure maintenance method according to claim 1, wherein the tower-like structure is maintained. The tower-like structure maintenance method according to claim 1 or 2, wherein the upper part of the maintenance column is assembled by a member lifted by the lifting frame. The maintenance strut and the existing tower are connected by a belt stay spanned around the existing tower at a plurality of portions in the vertical direction, and a tension member interposed between the maintenance strut and the existing tower. The maintenance method of the tower-like structure in any one of Claim 1 to 3 characterized by the above-mentioned. 5. The tower-like structure according to claim 1, wherein the elevating frame with respect to the maintenance column is guided by rollers or the like at least at two locations separated from each other vertically. Maintenance method. The tower-like structure maintenance method according to any one of claims 1 to 5 , wherein a lift device for raising and lowering a worker is installed at or near the maintenance column after the assembly of the maintenance column.

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