Steel tower dismantling and assembly device, steel tower dismantling method, and steel tower assembly method

Abstract

To provide a technique capable of disassembling existing steel towers and assembling new steel towers by using a device suitable for small-scale steel towers in order to solve problems of a conventional technique.SOLUTION: An steel tower disassembling / assembling device is used for disassembling an existing steel tower and assembling a new steel tower, and is provided with a columnar mast, mast support means, and member elevating / lowering means. The mast support means includes a "horizontal branch line" attached to the steel tower and a cylindrical "horizontal branch line fastener" supported by the horizontal branch line, and the mast is slidably inserted into the horizontal branch line fastener. In the state in which a demolition material and an assembly part of a steel tower are attached to the cargo handling rope, when a cargo handling rope is pulled down, disassembly materials and the like are lowered downward, and when the cargo handling rope is pulled up, assembly parts and the like are pulled up.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The invention of the present application relates to a technology for disassembling existing iron towers and assembling new iron towers. More specifically, it relates to an iron tower disassembly and assembly device that can be suitably used for disassembling and assembling relatively small-scale iron towers, and a method using the same.

Background Art

[0002] Transmission towers are one of the extremely important facilities for stably supplying power to consumers, and numerous towers are used in various places. Therefore, there are relatively new towers, towers that have been in use for a considerable period, and there are also not a few towers that have become difficult to continue using due to aging. Such aging towers may be repaired or reinforced, and in some cases, depending on the degree, it is not uncommon to disassemble them and construct new ones.

[0003] When disassembling an iron tower, generally the same device (method) as when the iron tower was assembled is used, and the procedure is generally the reverse of the procedure during assembly. And the device adopted during assembly (that is, disassembly) is planned according to the scale of the iron tower and the construction environment. For example, when constructing on flat land or gentle hills where a loading path is ensured, a mobile crane is adopted; when constructing in mountainous areas where it is difficult to move in large machinery, a steel support rod is used; when constructing a large iron tower in mountainous areas, a climbing crane is often adopted.

[0004] In the derrick construction method, as disclosed in Patent Document 1, a "derrick" is used, which is made by extending a boom of about 4m in length until it reaches the required length (for example, about 8 to 18m). The device used in the derrick construction method is generally a derrick structure with a maximum lifting capacity of about 2t, and the derrick, which is a steel truss or lattice structure, is the component corresponding to the boom part. This derrick is attached to the main column of the steel tower and is configured to be raised and lowered by operating guy wires. Then, by operating a winch on a wire rope that hangs down from the tip of the derrick (i.e., the tip of the boom) via a pulley, the suspended load attached to a hook at the lower end of the wire rope is raised and lowered. Generally, the derrick construction method is considered suitable for the assembly (i.e., dismantling) of steel towers that are over 20m in height and where the spacing between the main columns at the bottom of the tower (the so-called root spread) exceeds 5m.

[0005] In contrast, the climbing crane method, as disclosed in Patent Documents 2 and 3, primarily utilizes a mast and boom. The mast is positioned almost vertically and temporarily fixed to the upper end of the tower. The boom, one end of which is attached to the mast, is designed to be freely luffable, and a wire rope hangs from a pulley at the tip of the boom. By operating this wire rope with a winch, the suspended load attached to a hook at the lower end of the wire rope is raised and lowered. Generally, the climbing crane method is used when the minimum width of the tower exceeds the width of the crane equipment, and is therefore considered more suitable for the assembly (i.e., dismantling) of larger towers than the platform method. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2005-068864 [Patent Document 2] Japanese Patent Publication No. 2017-203358 [Patent Document 3] Japanese Patent Publication No. 2010-235265 [Overview of the project] [Problems that the invention aims to solve]

[0007] Incidentally, as mentioned earlier, some of these transmission towers have been standing for a considerable period of time, and some of the oldest are over half a century old. As a result, very few of the equipment and tools used to construct these older towers remain. Even if we were to try to dismantle the towers using equivalent equipment and tools in the reverse order of the original assembly method, it would be impossible to do so in light of current safety standards. Therefore, when dismantling older transmission towers, there is no choice but to adopt the methods that have become mainstream in recent years, namely the support pole method, the climbing crane method, or methods using mobile cranes.

[0008] On the other hand, older transmission towers, as can be understood from the technological level at the time of their construction, are shorter in height compared to recent towers, and the tower components used are thinner and more delicate, and most are considered to be small in scale. In other words, even these small towers are dismantled using methods such as the support pole method or the climbing crane method, but the dismantling equipment is excessive for the size of the tower, resulting in a poor cost balance, and some towers are so fragile and small that it is not even possible to attach steel support poles or climbing cranes to them.

[0009] The objective of the present invention is to solve the problems of the prior art, namely, to provide a technology that enables the dismantling of existing steel towers and the assembly of new steel towers using equipment suitable for small-scale steel towers. [Means for solving the problem]

[0010] The present invention focuses on reducing the weight of individual components by constructing the mast from multiple segmented columnar bodies, in order to achieve efficient and safe dismantling and assembly even for small-scale steel towers. This invention is based on an unprecedented idea.

[0011] The steel tower dismantling and assembly device of the present invention is a device used for dismantling existing steel towers and assembling new steel towers, and comprises a columnar mast, a mast support means, and a member lifting means. The mast is positioned inside the steel tower in a substantially vertical (including vertical) position and is formed by connecting multiple segmented columnar bodies vertically. The mast support means is positioned at two or more locations vertically to support the mast, and the member lifting means comprises a "cargo handling pulley" positioned at the top of the mast and a "cargo handling rope" wrapped around the cargo handling pulley. The mast support means is composed of a "horizontal guy wire" attached to the steel tower and a cylindrical "horizontal guy wire fastener" supported by the horizontal guy wire, and the mast is slidably inserted into the horizontal guy wire fastener. After attaching the dismantling materials and assembly parts of the steel tower to the cargo handling rope, pulling down the cargo handling rope lowers the dismantling materials, and pulling up the cargo handling rope lifts the assembly parts.

[0012] The tower dismantling and assembly apparatus of the present invention may also be configured to include two or more means for lifting and lowering members. In this case, by operating each of the load-handling ropes, two or more dismantling materials or assembly parts can be lifted and lowered independently.

[0013] The tower dismantling and assembly device of the present invention may further be equipped with one or two or more guide ropes. These guide ropes are installed under tension by having their upper ends fixed to the top of the mast and their lower ends fixed to a lower fastener installed on the tower (or on the ground).

[0014] The tower dismantling and assembly apparatus of the present invention may further be equipped with a mast lifting mechanism. This mast lifting mechanism is a means having a "mast pulley" that can be installed on the top of the tower and a "mast rope" that is wrapped around the mast pulley. In this case, multiple segmented column bodies connected vertically can be lifted by the mast lifting mechanism, and a new segmented column body can be connected to the lowest end while the column is in that state.

[0015] The present invention relates to a method for dismantling a steel tower, which involves using the steel tower dismantling and assembly device of the present invention to dismantle an existing steel tower, and comprises a mast construction process, a mast support process, a partial dismantling process, and a loading process. In the mast construction process, the mast is constructed by lifting the upper section of the column and then raising it while connecting the section to the lowest end. In the mast support process, the mast is supported by attaching one end of a horizontal guy wire to the steel tower and the other end to a horizontal guy wire fastener into which the mast is inserted. In the partial dismantling process, the steel tower located above the uppermost horizontal guy wire is dismantled, and in the loading process, the dismantled materials generated in the dismantling process are lowered to the ground by pulling down a cargo rope to which the dismantled materials are attached.

[0016] The present invention's method for dismantling a steel tower can also be used to construct a mast with horizontal guy wire fasteners temporarily fixed to the segmented column bodies. However, the horizontal guy wire fasteners are temporarily fixed with the segmented column bodies inserted inside. In this case, during the mast support process, after attaching the horizontal guy wires to the horizontal guy wire fasteners, the temporary fixing of the segmented column bodies and the horizontal guy wire fasteners is released.

[0017] The method for dismantling a steel tower according to the present invention may further include a horizontal guy wire removal step and a mast lowering step. In this horizontal guy wire removal step, after dismantling the tower located above the uppermost horizontal guy wire in the partial dismantling step, the uppermost horizontal guy wire is removed. In the mast lowering step, the mast is shortened by lifting it and removing the lowest section of the column, and the shortened mast is then lowered. In this case, in the partial dismantling step, the tower located above the newly designated uppermost horizontal guy wire is dismantled.

[0018] The present invention relates to a method for assembling a new steel tower using the present invention's steel tower dismantling and assembly device, and comprises a partial assembly process, a mast construction process, a mast support process, and a lifting process. In the partial assembly process, parts of the tower are assembled sequentially from the bottom up. In the mast construction process, the mast is constructed by lifting the segmented column bodies located at the top and then raising them while connecting the segmented column bodies to the lowest end. In the mast support process, one end of a horizontal guy wire is attached to the tower assembled in the partial assembly process, and the other end of the horizontal guy wire is attached to a horizontal guy wire fastener into which the mast is inserted, thereby supporting the mast. In the lifting process, assembly parts located above the tower assembled in the partial assembly process are attached to a cargo rope, and the assembly parts are lifted by pulling up the cargo rope. The newly constructed steel tower is then completed by assembling the assembly parts lifted in the lifting process, moving upwards. [Effects of the Invention]

[0019] The present invention provides the following advantages of a steel tower dismantling and assembly apparatus, a steel tower dismantling method, and a steel tower assembly method. (1) When dismantling or assembling small-scale transmission towers, it is possible to avoid using large-scale construction methods such as the support pole method or the climbing crane method. As a result, the cost and construction period for dismantling and assembling transmission towers can be reduced. (2) Conventional support pole methods and climbing crane methods require considerable lifting capacity, resulting in heavy equipment and leading to serious industrial accidents such as workers being caught or entangled in the machinery. In contrast, the present invention reduces the lifting capacity, thereby reducing the weight of the equipment used, which simplifies the work (especially work on top of towers), and ultimately improves the working environment and safety. (3) Even steel towers that are too fragile to install steel support poles or climbing cranes can be dismantled according to the present invention, and the dismantling and assembly of steel towers can be carried out even in locations (sites) where it is difficult to secure access routes. [Brief explanation of the drawing]

[0020] [Figure 1] Side view schematically showing an example of a tower targeted by the invention of the present application. [Figure 2] Side view schematically showing a tower disassembling and assembling device of the invention of the present application. [Figure 3] Side view schematically showing a mast formed by vertically connecting a plurality of divided column bodies. [Figure 4] (a) Side view schematically showing mast support means composed of a horizontal line and a horizontal line fixture, (b) Cross-sectional view schematically showing mast support means composed of a horizontal line and a horizontal line fixture. [Figure 5] (a) Side view schematically showing a tower disassembling and assembling device in which the lower end of a guide rope is fixed to a lower fixture, (b) Side view schematically showing a tower disassembling and assembling device in which the lower end of a guide rope is fixed to a lower fixture via an intermediate fixture. [Figure 6] Side view schematically showing a tower disassembling and assembling device in which the lower end of a guide rope is fixed to an anchor driven into the ground. [Figure 7] Side view schematically showing a rotating body locked to a guide rope and a carrier with disassembled materials attached. [Figure 8] (a) Plan view and side view schematically showing a circular top fixture, (b) Plan view and side view schematically showing a cross-shaped top fixture, (c) Plan view and side view schematically showing a top fixture having a shape in which guide ropes and cargo handling ropes are set in two upper and lower stages. [Figure 9] (a) Side view schematically showing mast lifting means installed on a tower, (b) Partial side view schematically showing a divided column body to which a mast rope is attached to a locking tool provided near the middle. [Figure 10] Side view explaining a work block of a tower. [Figure 11] Flow chart showing the main process flow of the tower disassembling method of the invention of the present application. [Figure 12] Step diagram schematically showing the main process of the tower disassembling method of the invention of the present application. [Figure 13] Flow chart showing the main process flow of the tower assembling method of the invention of the present application. [Figure 14] A step diagram schematically showing the main steps of the transmission tower assembly method of the present invention. [Modes for carrying out the invention]

[0021] An example of an embodiment of the present invention concerning the tower dismantling and assembly apparatus, tower dismantling method, and tower assembly method will be described with reference to the figures.

[0022] Figure 1 is a schematic side view showing an example of a steel tower ST that is the subject of the present invention. As shown in this figure, a steel tower ST is composed of members such as main column members Ma, web members Mb, crossarm members Mc, and top members Md. The present invention is a technology that can efficiently carry out the dismantling and assembly of such a steel tower ST. For convenience, a steel tower that is already installed will be referred to as an "existing steel tower," and a steel tower to be newly constructed will be referred to as a "newly constructed steel tower." Furthermore, the disassembled members that result from the dismantling of an existing steel tower will be referred to as "dismantled materials," and the parts necessary when assembling a newly constructed steel tower will be referred to as "assembly parts."

[0023] 1. Steel tower dismantling and assembly device First, the tower dismantling and assembly device of the present invention will be described. The tower dismantling method of the present invention is a method for dismantling an existing tower using the tower dismantling and assembly device of the present invention, and the tower assembly method of the present invention is a method for assembling a new tower using the tower dismantling and assembly device of the present invention. Therefore, the tower dismantling and assembly device of the present invention will be described first, and then the tower dismantling method and tower assembly method of the present invention will be described.

[0024] Figure 2 is a schematic side view of the tower dismantling and assembly device 100 of the present invention. As shown in this figure, the tower dismantling and assembly device 100 of the present invention is composed of a mast 110, a mast support means 120, and a member lifting means 130, and may also be composed of a top fastener 140, a guide rope 150 (described later), a transport body 160, a mast lifting means 170, and the like.

[0025] The following describes in detail each of the main elements that constitute the steel tower dismantling and assembly device 100 of the present invention.

[0026] (mast) As shown in Figure 2, the mast 110 is a columnar (tubular or rod-shaped) member positioned within the tower ST in a nearly vertical (including vertical) orientation. The mast 110 is formed by connecting multiple (five in the figure) segmented columnar bodies 111 vertically, as shown in Figure 3, and therefore connecting parts 112 are provided between vertically adjacent segmented columnar bodies 111. When installing the mast 110 within the tower ST, the lower end can be placed directly on the ground, or a mast support 113 as shown in Figure 3 can be used. This mast support 113 is composed of a plate-shaped member and a tubular member, and the mast 110 is stabilized by placing the plate-shaped member on the ground and then inserting the end (lower end) of the lowest segmented columnar body 111 into the tubular member.

[0027] It is preferable to use lightweight materials for the segmented columns 111 rather than relatively heavy materials such as metal. For example, it is desirable to make them as lightweight as possible (for example, about 10 kg per column) by using FRP (Fiber Reinforced Plastics) such as CFRP (Carbon Fiber Reinforced Plastics) or by wrapping reinforcing CFRP around general-purpose resin pipes.

[0028] The connection between the divided columns 111 at the connecting section 112 should be designed to allow for easy attachment and detachment. For example, the diameter of one end can be made smaller than the other, and the smaller diameter divided column 111 can be inserted into the larger diameter divided column 111 to connect them. In this case, the upper and lower divided columns 111 can be wrapped with adhesive tape such as OPP (Oriented Polypropylene) tape to prevent them from coming apart, or a structure can be created in which pins or the like are inserted through small holes provided on both sides. Alternatively, the upper and lower divided columns 111 can simply be butted together and then wrapped with OPP tape or the like to create a connecting structure.

[0029] (Mast support means) The mast support means 120 is a means for supporting the mast 110, and is arranged at multiple locations (five locations in the figure) separated vertically, as shown in Figure 2. The mast support means 120 also includes horizontal guy wires 121 and horizontal guy wire fasteners 122, as shown in Figure 4. Figure 4 is a schematic diagram of the mast support means 120 consisting of horizontal guy wires 121 and horizontal guy wire fasteners 122, where (a) is a side view and (b) is a cross-sectional view taken from the horizontal plane.

[0030] The horizontal guy wire 121 is a rope-like, rod-like, or tubular member, and as shown in Figure 4, one end is attached to a part of the tower ST (especially the main column member Ma), and the other end is attached to the horizontal guy wire fastener 122. Therefore, as many horizontal guy wires 121 as there are main column members Ma can be installed. For example, in the case of Figure 4, since this tower ST has four main column members Ma, four horizontal guy wires 121 are installed.

[0031] The horizontal guy wire fastener 122 is a cylindrical member, and its inner diameter is slightly larger than the outer diameter of the mast 110 (i.e., the segmented column 111). This allows the mast 110 (i.e., the segmented column 111) to slide through the horizontal guy wire fastener 122. Furthermore, as described above, the horizontal guy wire fastener 122 is attached to the horizontal guy wire 121, and the horizontal guy wire 121 is attached to the tower ST. In other words, the horizontal guy wire fastener 122 is supported by the tower ST via the horizontal guy wire 121. Therefore, when the mast 110 (i.e., the segmented column 111) is inserted into the horizontal guy wire fastener 122, the mast 110 is supported by the horizontal guy wire fastener 122 (indirectly, by the tower ST).

[0032] (Means for lifting and lowering members) As shown in Figure 2, the member lifting means 130 is composed of a cargo handling pulley 131 and a cargo handling rope 132, and may also be composed of an auxiliary cargo handling pulley 133. The cargo handling pulley 131 is provided at the top of the mast 110, and the cargo handling rope 132 is wrapped around this cargo handling pulley 131. When arranging the cargo handling pulley 131, it is preferable to install a generally plate-shaped top fastener 140 at the top of the mast 110 and attach the cargo handling pulley 131 to this top fastener 140.

[0033] One end of the cargo handling rope 132, which is wrapped around the cargo handling pulley 131 (hereinafter referred to as the "lifting end"), is fitted with dismantled materials or assembled parts (hereinafter collectively referred to as "lifting members"), while the other end (hereinafter referred to as the "operating end") is used for operations such as winding (pulling) or unwinding (loosening). Therefore, the operating end of the cargo handling rope 132 is lowered to the ground and used in a position that is roughly horizontal, for example, via the cargo handling auxiliary pulley 133. The operation (winding and unwinding) of the operating end of the cargo handling rope 132 can be performed manually or using a winding device such as a hand winch.

[0034] By attaching a lifting member to the load-side end of the cargo handling rope 132 and operating the operating end, the load is raised or lowered. For example, when dismantling an existing steel tower, the dismantling material attached to the load-side end of the cargo handling rope 132 can be lowered to the ground by pulling down the load-side end of the cargo handling rope 132, and when assembling a new steel tower, the assembly parts attached to the load-side end can be lifted to the designated position by pulling up the load-side end of the cargo handling rope 132.

[0035] Furthermore, the member lifting means 130 can be placed in multiple locations, and it is particularly desirable to place the same number of means as the number of main column members Ma that make up the steel tower ST (for example, 4). In this case, multiple (for example, 4) load-handling pulleys 131 are placed at the top of the mast 110 (top fastener 140), and load-handling pulleys 131 are wrapped around each load-handling pulley 131. If a hand winch or the like is used, the hand winch or the like is connected to the operating end of each. Therefore, in the case where multiple member lifting means 130 are provided, multiple suspended loads can be lifted or lowered simultaneously or separately, or in other words, each member lifting means 130 can lift or lower a suspended load independently.

[0036] (Guide rope) Depending on the size of the transmission tower ST to be dismantled or assembled (especially its height and base spread), the mast 110 may be able to stand stably on its own, but in some cases it may require some form of support. In this case, it is advisable to create a structure that supports the mast 110 by tensioning a guide rope 150. For this reason, it is desirable to install the guide rope 150 under tension, fixing its upper end to the top of the mast 110 (top fastener 140) and, while pulling it, fixing its lower end to the bottom of the transmission tower ST. When fixing the lower end of the guide rope 150 to the bottom of the transmission tower ST, it can be fixed to a lower fastener 151 installed below the transmission tower ST, as shown in Figure 5(a). Depending on the size of the transmission tower ST, it can also be fixed to the lower fastener 151 via an intermediate fastener 152 installed near the middle of the transmission tower ST, as shown in Figure 5(b). Furthermore, the lower end of the guide rope 150 can be fixed not only to the lower fastener 151 installed on the transmission tower ST, but also to a lower fastener 151 installed on the ground (ground). For example, in Figure 6, an anchor serving as the lower fastener 151 is driven into the ground, and the lower end of the guide rope 150 is fixed to this anchor (the lower fastener 151 in this case). Of course, in addition to anchors driven into the ground, simple piles, weights placed on the ground, and other existing structures can also be used as the lower fastener 151.

[0037] By the way, when raising or lowering the lifting member attached to the load-side end of the cargo handling rope 132, it is possible that the lifting member may come into contact with the steel tower ST because the cargo handling rope 132 is close to the steel tower ST. In this case as well, it is advisable to install a guide rope 150. By installing the guide rope 150 at a position away from the steel tower ST and raising or lowering the lifting member along this guide rope 150, contact with the steel tower ST can be avoided. When raising or lowering the lifting member along the guide rope 150, a transporter 160 as shown in Figure 7 can be used. This transporter 160 has rotating parts 161 such as pulleys or rollers, and by locking these rotating parts 161 to the guide rope 150, it can move along the guide rope 150. Therefore, by attaching the lifting end of the cargo handling rope 132 to, for example, the demolition material PD, securing the rotating body 161 to the guide rope 150, and further attaching the transport body 160 to the demolition material PD, the demolition material PD can be raised and lowered along the guide rope 150.

[0038] In terms of supporting the mast 110, it is desirable to tension it from multiple directions, and therefore it is good to tension the guide ropes 150 in multiple lines. Also, in terms of avoiding contact with the tower ST, it is good to tension the guide ropes 150 as far away from the mast 110 as possible. For this reason, the top fastener 140 installed at the top of the mast 110 should have the shape shown in Figure 8. For example, the top fastener 140 shown in Figure 8(a) has a structure in which the upper end of the guide rope 150 is fixed to a circular plate, and it is possible to fix multiple guide ropes 150 and ensure a distance between the guide ropes 150 and the mast 110. The top fasteners 140 shown in Figure 8(b) and Figure 8(c) have a structure in which the upper end of the guide rope 150 is fixed to each of the four arms, and in this case as well, it is possible to fix four guide ropes 150 and ensure a distance between the guide ropes 150 and the mast 110. While it is desirable to install multiple guide ropes 150 when supporting the mast 110, if the purpose is solely to avoid contact with the tower ST, it is sufficient to install the same number of guide ropes 150 as the number of member lifting means 130 (cargo handling ropes 132). Therefore, in the case where one member lifting means 130 is installed, one guide rope 150 is installed.

[0039] (Mast lifting mechanism) As previously described, the mast 110 is formed by connecting multiple segmented columns 111 vertically. A mast lifting mechanism 170 is used to construct the mast 110. As shown in Figure 9(a), this mast lifting mechanism 170 consists of a mast pulley 171 and a mast rope 172, and can also include an auxiliary mast pulley 173. The mast pulley 171 is installed at the top of the tower ST, and the mast rope 172 is wrapped around this mast pulley 171.

[0040] A segmented column 111 is attached to one end (hereinafter referred to as the "mast end") of the mast rope 172, which is wrapped around the mast pulley 171, and the other end (hereinafter referred to as the "operation end") is used for operations such as winding (pulling) and unwinding (loosening). For this reason, the operation end of the mast rope 172 should be lowered to the ground and used in a position that is roughly horizontal, for example, via the mast auxiliary pulley 173. The operation (winding and unwinding) of the operation end of the mast rope 172 can be performed manually or using a winding device such as a hand winch.

[0041] The procedure for constructing the mast 110 using the mast lifting mechanism 170 will be described below with reference to Figure 9. First, the mast lifting mechanism 170 is installed in a predetermined position, such as by fixing the mast pulley 171 to the top of the tower ST. Next, the segmented column 111 (however, the segmented column 111 that constitutes the uppermost part of the mast 110) is attached to the mast-side end of the mast rope 172, and the segmented column 111 is lifted by winding up the operating end. Note that the completed mast 110 needs to protrude even higher than the top of the tower ST, so it is preferable to attach the mast-side end of the mast rope 172 to the middle of the segmented column 111 rather than the upper end. For example, in Figure 9(b), the mast-side end of the mast rope 172 is attached to a locking device 114 provided near the middle of the segmented column 111.

[0042] When the uppermost segmented column 111 is lifted, the second segmented column 111 (the second highest segmented column 111) is set directly below it, connecting the vertically aligned segmented columns 111. By repeating this series of operations, the mast 110 is completed. In Figure 9(a), the mast lifting mechanism 170 is lifting the three vertically connected segmented columns 111, and is about to set the fourth segmented column 111 directly below them.

[0043] The procedure for dismantling the mast 110 can generally be done by reversing the construction procedure. That is, first, with the mast lifting mechanism 170 supporting the weight of the mast 110 (or multiple connected segmented columns 111), the lowest segmented column 111 is removed. Then, the segmented columns 111 connected to the same height as the removed segmented column 111 are lowered, and with the mast lifting mechanism 170 supporting the weight of the segmented columns 111, the segmented column 111 that was designated as the lowest is removed. By repeating this series of operations, the mast 110 can be dismantled.

[0044] 2. Method for dismantling transmission towers Next, the method for dismantling a transmission tower according to the present invention will be explained with reference to the diagram. The method for dismantling a transmission tower according to the present invention is a method for dismantling an existing transmission tower using the transmission tower dismantling and assembly device 100 described so far. Therefore, explanations that overlap with the explanation of the transmission tower dismantling and assembly device 100 will be avoided, and only the contents specific to the transmission tower dismantling method according to the present invention will be explained. In other words, contents not described here are the same as those explained in "1. Transmission Tower Dismantling and Assembly Device".

[0045] The method for dismantling a steel tower according to the present invention is best carried out by dividing it into multiple blocks (hereinafter referred to as "work blocks") with the mast support means 120 as the boundary. For example, in Figure 10, since five stages of mast support means 120 are arranged in the middle, the first work block BL01 to the sixth work block BL06 are set from the top. A typical steel tower ST is constructed by bolting together members (main column members Ma and bracing members Mb, etc.). Therefore, it is best to determine the position of the bolt connections and then set up the work blocks (arrange the mast support means 120) so that dismantling can be done by simply releasing the bolt connections. If members remain that straddle the work blocks, they can be dismantled by cutting the members using gas or the like.

[0046] The main steps of the tower dismantling method of the present invention will be explained below with reference to Figures 11 and 12. Figure 11 is a flowchart showing the main steps of the tower dismantling method of the present invention, and Figure 12 is a step diagram schematically showing the main steps of the tower dismantling method of the present invention. For convenience, the explanation here will use an example in which a tower dismantling assembly device 100 without guide ropes 150 is not installed.

[0047] First, the top member Md of the tower ST is removed in advance, and the mast lifting means 170 is installed in a predetermined position, such as by fixing the mast pulley 171 to the top of the tower ST. Next, a segmented column 111 (however, the segmented column 111 that constitutes the uppermost part of the mast 110) is attached to the mast-side end of the mast rope 172, and the segmented column 111 is lifted by winding up the operating end. Once the uppermost segmented column 111 is lifted, the segmented column 111 (the second uppermost segmented column 111) is set directly below it, and the segmented columns 111 that are lined up vertically are connected. As shown in Figure 12(a), the mast 110 is completed by repeating this series of operations (Step 201 in Figure 11).

[0048] When constructing the mast 110, it is advisable to temporarily fix the horizontal guy wire fasteners 122 in advance at the positions where the mast support means 120 will be placed on the mast 110. Specifically, the horizontal guy wire fasteners 122, which are inserted through the segmented column 111, are temporarily fixed to the segmented column 111 at the predetermined positions, meaning that the mast 110 is completed while lifting the segmented column 111 equipped with the horizontal guy wire fasteners 122. At this time, the horizontal guy wire fasteners 122 should be temporarily fixed to the segmented column 111 using a method that allows for easy removal, such as fixing the horizontal guy wire fasteners 122 with tape. When using a tower dismantling and assembly device 100 with guide ropes 150 (hereinafter referred to in particular as "tower dismantling and assembly device 100 with guide ropes"), the guide ropes 150 should be installed after the mast 110 has been constructed.

[0049] Once the mast 110 is constructed, it is supported by the mast support means 120 (Step 202 in Figure 11). Specifically, one end of the horizontal guy wire 121 is attached to a part of the tower ST (especially the main column member Ma), and the other end is attached to the horizontal guy wire fastener 122. When the horizontal guy wire 121 is attached to the horizontal guy wire fastener 122, the temporary fixing between the divided column body 111 and the horizontal guy wire fastener 122 is released. Once the mast 110 is supported by all stages of the mast support means 120, the tower dismantling and assembly device 100 is completed as shown in Figure 12(b).

[0050] Once the tower dismantling and assembly device 100 is complete, the mast pulley 171 is removed, and the work block above the mast support means 120 located at the top (the first work block BL01 in Figure 10) is partially dismantled (Step 203 in Figure 11). Specifically, the main column members Ma and bracing members Mb are removed while releasing the bolt connections (or gas cutting). Then, as shown in Figure 12(c), the dismantling material PD is attached to the load-side end of the handling rope 132, and the load-side end of the handling rope 132 is pulled down to lower the dismantling material PD to the ground (Step 204 in Figure 11). In the case of using the tower dismantling and assembly device 100 with a guide rope, it is preferable to use the guide rope 150 and the transport body 160, that is, to lower the dismantling material PD to the ground along the guide rope 150.

[0051] Once the partial dismantling of the uppermost work block (for example, the first work block BL01) is complete, the mast support means 120 located at the top is removed as shown in Figure 12(d) (Step 205 in Figure 11). Next, a mast pulley 171 is installed at the top of the current tower ST, and the lowest segmented column 111 is removed with the mast lifting means 170 supporting the weight of the mast 110 as shown in Figure 12(e). Furthermore, the shortened mast 110 (i.e., the multiple connected segmented column 111s) is lowered by the mast lifting means 170 until it touches the ground (Step 206 in Figure 11), as shown in Figure 12(f). In the case of using the tower dismantling and assembly device 100 with guide ropes, the guide ropes 150 are temporarily removed before removing the lowest segmented column 111, and the guide ropes 150 are re-tensioned once the segmented column 111 has been lowered and touched the ground.

[0052] The existing transmission tower is dismantled by repeating the series of operations described above (Steps 203 to 206 in Figure 11) for all work blocks.

[0053] 3. Method of assembling the transmission tower Next, the method for assembling a steel tower according to the present invention will be explained with reference to the figures. The method for assembling a steel tower according to the present invention is a method for assembling a new steel tower using the steel tower dismantling and assembly device 100 described so far. Therefore, explanations that overlap with those described for the steel tower dismantling and assembly device 100 and the steel tower dismantling method will be avoided, and only the contents specific to the steel tower assembly method according to the present invention will be explained. In other words, contents not described here are the same as those described in "1. Steel Tower Dismantling and Assembly Device" and "2. Steel Tower Dismantling Method".

[0054] The main steps of the tower assembly method of the present invention will be explained below with reference to Figures 13 and 14. Figure 13 is a flowchart showing the main steps of the tower assembly method of the present invention, and Figure 14 is a step diagram schematically showing the main steps of the tower assembly method of the present invention. For convenience, the explanation here will use an example in which a tower dismantling and assembly device 100 without guide ropes 150 is not installed.

[0055] First, as shown in Figure 14(a), the lowest work block, the "foundation block (6th work block BL06 in Figure 10)," is constructed (Step 301 in Figure 13), and the mast pulley 171 is fixed to the top of the foundation block to install the mast lifting mechanism 170. Then, using the mast lifting mechanism 170, the segmented column 111 is lifted to construct a "foundation mast (connected segmented column 111)" that protrudes from the foundation block by a predetermined length (Step 302 in Figure 13).

[0056] Once the foundation mast is constructed, the mast pulley 171 is removed, and the mast pulley 171 is then partially assembled on the work block above the foundation block (the fifth work block BL05 in Figure 10) (Step 303 in Figure 13). Specifically, the main column members Ma and bracing members Mb are connected by bolting (or welding). At this time, as shown in Figure 14(b), the assembly part PA is attached to the load-side end of the cargo handling rope 132, and then the load-side end of the cargo handling rope 132 is pulled up to lift the assembly part PA to the predetermined position.

[0057] Once the assembly of the second work block (the fifth work block BL05 in Figure 10) is complete, a mast pulley 171 is installed at the very top of the existing tower ST, and as shown in Figure 14(c), the mast lifting mechanism 170 supports the weight of the divided column 111, and a new divided column 111 is connected to the lowest end (Step 304 in Figure 13). As the mast 110 is partially extended in this way, the mast support mechanism 120 supports the mast 110 as shown in Figure 14(d) (Step 305 in Figure 13). Specifically, one end of the horizontal guy wire 121 is attached to a part of the tower ST (especially the main column member Ma), and the other end is attached to the horizontal guy wire fastener 122.

[0058] The new transmission tower is assembled by repeating the series of operations described so far (Steps 303 to 305 in Figure 13) for all work blocks. [Industrial applicability]

[0059] The present invention provides a tower dismantling and assembly apparatus, a tower dismantling method, and a tower assembly method that can be used for the dismantling and assembly of various types of towers, including power transmission towers. According to this invention, the dismantling and assembly of towers can be carried out efficiently and economically, and considering that this contributes to extending the lifespan of power transmission towers, which are extremely important social infrastructure, this invention is not only industrially applicable but also has the potential to make a significant social contribution. [Explanation of symbols]

[0060] 100 The present invention of a steel tower dismantling and assembly device 110 (Mast of a transmission tower dismantling and assembly device) 111 (Mast) Divided Column 112 (Mast) connection section 113 (Mast) Mast support 114 (Mast) Locking device 120 (Mast support means of the tower dismantling and assembly device) 121 Horizontal guy wires (of mast support means) 122 Horizontal guy wire fastener (for mast support means) 130 (Means for lifting and lowering members of a transmission tower dismantling and assembly device) 131 (Pulley for lifting / lowering members) 132 (For lifting and lowering components) Cargo handling ropes 133 Auxiliary pulley for material handling (of a means for lifting and lowering components) 140 (Top fastener of the tower dismantling and assembly device) 150 (Guide rope for the tower dismantling and assembly device) 151 Lower fastener (for guide rope) 152 (Intermediate fastener for guide rope) 160 (Transporter body for tower dismantling and assembly equipment) 161 Rotating body (of a conveyor) 170 (Mast lifting / lowering means of a steel tower dismantling and assembly device) 171 Mast pulley (for mast lifting / lowering mechanism) 172 (Mast rope for mast raising / lowering mechanism) 173 Auxiliary pulley for the mast (for mast lifting / lowering mechanism) Ma main pillar material Mb belly material Mc arm metal Md top member PA Assembly Parts PD demolition materials ST transmission tower

Claims

1. A device used for dismantling existing steel towers or assembling new steel towers, A columnar mast is formed by connecting multiple segmented columnar bodies vertically or in a nearly vertical position within the aforementioned tower, Mast support means arranged at two or more locations above and below to support the mast, A member lifting means having a cargo handling pulley positioned at the top of the mast and a cargo handling rope wrapped around the cargo handling pulley, The mast comprises a plate-shaped top fastener installed on the top of the mast, The aforementioned load-handling pulley is attached to the aforementioned top fastener. The mast support means comprises a horizontal guy wire attached to the tower and a cylindrical horizontal guy wire fastener supported by the horizontal guy wire. The mast is slidably inserted into the horizontal guy wire fastener, The aforementioned cargo handling rope can be used to attach dismantled materials from the steel tower or assembly parts from the steel tower, and then the cargo handling rope can be lowered and raised. A tower dismantling and assembly device characterized by the following features.

2. Further comprising two or more guide ropes, The aforementioned top fastener has a plurality of small holes or arms, Each of the aforementioned guide ropes, while under tension, has its upper end fixed to the small hole or arm related to the top fastener, and its lower end fixed to the lower fastener installed on the tower or on the ground. The mast can be supported by pulling it from multiple directions using two or more of the aforementioned guide ropes. The tower dismantling and assembly apparatus according to claim 1, characterized in that it is a steel tower dismantling and assembly apparatus.

3. A device used for dismantling existing steel towers or assembling new steel towers, A columnar mast is formed by connecting multiple segmented columnar bodies vertically or in a nearly vertical position within the aforementioned tower, Mast support means arranged at two or more locations above and below to support the mast, The system comprises two or more lifting means for a cargo handling pulley positioned at the top of the mast, and a cargo handling rope wrapped around the cargo handling pulley. The mast support means comprises a horizontal guy wire attached to the tower and a cylindrical horizontal guy wire fastener supported by the horizontal guy wire. The mast is slidably inserted into the horizontal guy wire fastener, By attaching the dismantling materials or assembly parts of the steel tower to the aforementioned cargo handling ropes, and then lowering and raising each of the cargo handling ropes, two or more of the dismantling materials or assembly parts can be raised and lowered independently. A tower dismantling and assembly device characterized by the following features.

4. A device used for dismantling existing steel towers or assembling new steel towers, A columnar mast is formed by connecting multiple segmented columnar bodies vertically or in a nearly vertical position within the aforementioned tower, Mast support means arranged at two or more locations above and below to support the mast, A member lifting means having a cargo handling pulley positioned at the top of the mast and a cargo handling rope wrapped around the cargo handling pulley, The system comprises a mast lifting mechanism having a mast pulley that can be installed on the top of the aforementioned steel tower, and a mast rope that is wrapped around the mast pulley, The mast support means comprises a horizontal guy wire attached to the tower and a cylindrical horizontal guy wire fastener supported by the horizontal guy wire. The mast is slidably inserted into the horizontal guy wire fastener, With the mast lifting mechanism in place, a new segmented column can be connected to the lowest end while the multiple segmented column bodies connected vertically are suspended. The aforementioned cargo handling rope can be used to attach dismantled materials from the steel tower or assembly parts from the steel tower, and then the cargo handling rope can be lowered and raised. A tower dismantling and assembly device characterized by the following features.

5. A method for dismantling an existing steel tower using a steel tower dismantling and assembly device, The aforementioned tower dismantling and assembly apparatus comprises a columnar mast formed by vertically connecting a plurality of segmented columnar bodies arranged vertically or substantially vertically within the tower, mast support means arranged at two or more locations vertically to support the mast, and member lifting means consisting of a cargo handling pulley positioned at the top of the mast and a cargo handling rope wrapped around the cargo handling pulley. The mast support means comprises a horizontal guy wire attached to the tower and a cylindrical horizontal guy wire fastener supported by the horizontal guy wire. The mast construction process involves lifting the segmented column located above and then raising it while connecting the segmented column to the lowest end, thereby constructing the mast, A mast support step involves attaching one end of the horizontal guy wire to the tower and attaching the other end of the horizontal guy wire to the horizontal guy wire fastener into which the mast is inserted, thereby supporting the mast. A partial demolition process for dismantling the tower located above the uppermost horizontal guy wire, The dismantled materials generated in the partial dismantling process are attached to the cargo handling rope, and the cargo handling rope is lowered to the ground in the unloading process. A method for dismantling a transmission tower, characterized by comprising the following features.

6. In the mast construction process, the mast is constructed with the divided column body inserted into the horizontal guy wire fastener and the horizontal guy wire fastener temporarily fixed to the divided column body. In the mast support process, after attaching the horizontal guy wire to the horizontal guy wire fastener, the temporary fixing between the divided column and the horizontal guy wire fastener is released. The method for dismantling a transmission tower according to claim 5, characterized in that it is a feature of the present invention.

7. After dismantling the tower located above the uppermost horizontal guy wire in the aforementioned partial dismantling process, a horizontal guy wire removal process is performed to remove the uppermost horizontal guy wire. The system further comprises a mast lowering step, in which the mast is shortened by lifting the mast and then removing the lowermost segmented column, and the shortened mast is lowered. In the aforementioned partial dismantling process, the tower located above the newly designated uppermost horizontal guy wire is dismantled. The method for dismantling a transmission tower according to claim 5 or 6, characterized in that it is the method for dismantling a transmission tower.

8. A method for assembling a newly constructed steel tower using the steel tower dismantling and assembly apparatus described in any one of claims 1 to 4, A partial assembly process for assembling a portion of the aforementioned transmission tower, The mast construction process involves lifting the segmented column located above and then raising it while connecting the segmented column to the lowest end, thereby constructing the mast, A mast support step is performed in which one end of the horizontal guy wire is attached to the steel tower assembled in the partial assembly step, and the other end of the horizontal guy wire is attached to the horizontal guy wire fastener into which the mast is inserted, thereby supporting the mast. A lifting process involves attaching the assembled parts, which are positioned above the steel tower assembled in the aforementioned partial assembly process, to the cargo handling rope, and then lifting the assembled parts by pulling up the cargo handling rope. The newly constructed steel tower is completed by assembling the assembly parts that were lifted in the aforementioned lifting process. A method for assembling a steel tower, characterized by the features described herein.

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