Lifting device and lifting method

Abstract

To provide a lifting device and a lifting method capable of safely lifting a pedestal.SOLUTION: The lifting device according to the technique includes a pedestal 2 and a support column 4 erected along a columnar object 3 in a lifting device 1 that lifts the pedestal 2 that lifts or lowers the member along a columnar object 3. The pedestal 4 is provided with a lifting mechanism 6 for lifting the pedestal 2 and a positioning mechanism 7 for fixing the pedestal 2 at a predetermined position.SELECTED DRAWING: Figure 16

Description

[Technical field]

[0001] The present technology relates to a lifting device and a lifting method for raising and lowering a platform rod for lifting or lowering a member along a column-shaped object. [Background technology]

[0002] Conventionally, prefabricated steel towers have been used for various purposes such as power transmission and distribution line poles, antenna poles, lighting poles, radio poles, etc. Prefabricated steel towers are made by joining tubular column-shaped parts together to form a single column, and the erection methods for these towers are broadly divided into an erection method, in which the column-shaped parts are joined together in a horizontal position to form an assembled steel tower, and a stacking method, in which the column-shaped parts are assembled from the bottom up.

[0003] The stacking method includes the crane lifting method, in which the column parts of the steel tower are lifted with a large heavy machine such as a crane, and the stand pole method, in which a rod-shaped member called a stand pole is fixed to an existing column part, etc., and the column parts are lifted by a wire rope hung on a pulley attached to the stand pole. The stand pole method allows the steel tower to be assembled on-site in a horizontal position, and can be assembled on-site even in mountainous areas or narrow areas where it is difficult to bring in large heavy machines. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-204506 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the stand pole method, each time a column part is assembled, the stand pole that was fixed to the existing column part is removed and then pulled up to the top column part and fixed in place. During this type of work, it is necessary to prevent accidents such as accidentally dropping the stand pole (see Figure 24). For example, in construction work for erecting steel towers of relatively low height in mountainous areas or narrow areas, the stand pole is attached, detached, and transported by hand, so measures to prevent it from falling are particularly required.

[0006] Therefore, an object of the present technology is to provide a lifting device and a lifting method that can safely lift and lower a platform rod. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the lifting device according to the present technology is a lifting device that lifts and lowers a platform rod that lifts or lowers a member along a pillar-shaped object, and includes a platform rod and a support pillar that is erected along the pillar-shaped object, and the support pillar is provided with a lifting mechanism that lifts and lowers the platform rod and a positioning mechanism that fixes the platform rod at a predetermined position. The lifting mechanism has a carriage to which the platform is attached and a rail section that continues along the longitudinal direction of the support pillar, and the platform can be raised and lowered by the carriage running along the rail section, and the positioning mechanism has a plurality of insertion holes provided along the longitudinal direction of the rail section and a fixing pin that is inserted into the insertion holes, and the position of the platform is fixed by abutting the fixing pin against the carriage. It is something.

[0008] In addition, the lifting method of the present technology is a lifting method in which a platform rod for hoisting or lowering a component is raised and lowered along a column-shaped object or a column-shaped part that constitutes the column-shaped object, and includes a platform rod, a cart to which the platform rod is attached, a support pillar that is erected along the column-shaped object or the column-shaped part, and a rail section that is connected to the support pillar and continues along the longitudinal direction of the support pillar, and the platform rod is raised and lowered by the cart running along the rail section. Effect of the Invention

[0009] According to this technology, the platform is moved and fixed using a lifting mechanism and a positioning mechanism, which means that, unlike when the platform is attached, detached, or transported by human power, accidents involving the platform falling can be prevented and construction can be carried out safely. [Brief description of the drawings]

[0010] [Figure 1]FIG. 1 is a diagram showing a columnar object formed by assembling columnar parts. [Diagram 2] FIG. 2 is a plan view showing a state in which the support part is fixed to the column-shaped part. [Diagram 3] FIG. 3 is an exploded perspective view showing the support carriage. [Figure 4] FIG. 4 is a perspective view showing a manual trolley. [Diagram 5] FIG. 5 is a perspective view illustrating the connection of the rail portions. [Figure 6] FIG. 6 is a perspective view showing a state in which the driving bogie is fixed by the positioning mechanism. [Figure 7] FIG. 7 shows the process of installing the bottom columnar part in the borehole. [Figure 8] FIG. 8 is a diagram showing a process of assembling a column part to the upper part of the column part protruding above the ground. [Figure 9] FIG. 9 is a diagram showing a process of placing the bottom support part adjacent to the column-shaped part. [Figure 10] FIG. 10 is a diagram showing a process of lifting the column-shaped part by the lifting device. [Figure 11] FIG. 11 is a diagram showing a process of lifting the support part by the lifting device. [Figure 12] FIG. 12 is a diagram showing a process of lifting the support part by the lifting device. [Figure 13] FIG. 13 is a diagram showing a process of lifting the platform rod by the lifting device. [Figure 14] FIG. 14 is a diagram showing a process of lifting the platform rod by the lifting device. [Figure 15] FIG. 15 is a diagram showing a process of fixing the platform rod at a raised position by the lifting device. [Figure 16] FIG. 16 is a diagram showing a process of lifting the column-shaped part by a lifting device. [Figure 17] FIG. 17 is a diagram showing a process of lifting the column-shaped part by a lifting device. [Figure 18]FIG. 18 is a diagram showing a process of lifting the support part by the lifting device. [Figure 19] FIG. 19 is a diagram showing a process of lifting the platform rod by the lifting device. [Figure 20] FIG. 20 is a diagram showing a column-shaped object erected by the platform pole method using a lifting device. [Figure 21] FIG. 21 is a diagram showing a process of lifting the support part by the lifting device. [Figure 22] FIG. 22 is a diagram showing a process in which the support parts installed on the ground are removed together with the base pole by ground workers. [Figure 23] FIG. 23 is a diagram showing the state after the pillar-shaped object has been erected and the support pillar has been removed. [Figure 24] FIG. 24 shows an accident in which the platform rod falls. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a lifting device and a lifting method to which the present technology is applied will be described in detail with reference to the drawings. Note that the present technology is not limited to the following embodiments, and various modifications are possible within the scope of the present technology. In addition, the drawings are schematic, and the ratios of the dimensions may differ from the actual ones. Specific dimensions should be determined with reference to the following explanation. In addition, the drawings include parts in which the dimensional relationships and ratios differ from each other.

[0012] The lifting device 1 to which this technology is applied is a lifting device that raises and lowers a platform rod that hoists or lowers components along a pillar-shaped object, and the lifting device 1 is equipped with a platform rod 2 and a support pillar 4 that is connected and fixed to the pillar-shaped object 3, and the support pillar 4 is equipped with a lifting mechanism 6 that raises and lowers the platform rod 2, and a positioning mechanism 7 that fixes the platform rod 2 at a predetermined position.

[0013] [Columnar object] The columnar structure 3 is a prefabricated tower used for various purposes such as power transmission and distribution line poles, antenna poles, lighting poles, radio poles, etc., and is constructed by assembling multiple columnar parts. Each columnar part is assembled in order from the ground surface, and the upper columnar part is lifted up by a platform pole method.

[0014] For example, as shown in FIG. 1, the columnar object 3 is formed by connecting a number of columnar parts 10. Each columnar part 10 has a cylindrical shape and a conical cross section, and the diameter gradually decreases from the base to the tip. Therefore, the columnar object 3 tapers upward, and the columnar part 10 to be lifted also has a smaller diameter as it goes upward, resulting in a reduction in weight. The shape of the columnar object 3 is not limited to a tapered shape, and may be a columnar object with a constant thickness. The shape of the columnar object 3 is not particularly limited, and may be a square column or other polygonal cross section in addition to a cylinder.

[0015] In addition, each columnar part 10 is connected by fitting the tip of the columnar part 10 with the base of another columnar part 10 to be assembled on the upper part. There is no particular limitation on the method of connecting each columnar part 10, and a connecting method other than fitting may be used.

[0016] In addition, it is preferable to provide a scaffold on the column part 10 so that workers can climb up and work on it. This allows two workers to work on erecting the column, one who climbs the support part 5 (described later) and the other who climbs the column part 10.

[0017] The columnar parts 10 of the columnar object 3 include functional members such as lighting and antennas in addition to the members constituting the column. The lifting device 1 according to the present technology can also lift and lower the members that perform functions according to the applications of these columnar objects 3.

[0018] The material of the pillar 3 is not particularly limited, and can be appropriately designed according to the purpose, height, etc. For example, the pillar 3 is a steel tower.

[0019] [Standard] The platform pole 2 for hoisting these column parts 10 is, for example, cylindrical, with a first pulley 20 attached to its tip. A hoisting rope 21 is hung over the first pulley 20, and it hoists up and down the column parts 10 of the column object 3 and the support parts 5 of the support 4 (see FIG. 11).

[0020] [Prop] The support 4 is provided adjacent to the columnar object 3, and is used to raise and lower the base rod along the columnar object 3 by providing a lifting mechanism 6 described later (see FIG. 13). The support 4 is a polygonal column such as a square column or a columnar body having another shape, and is configured by connecting a plurality of support parts 5 in the longitudinal direction. Each support part 5 is formed into a square column shape by integrating, for example, four pipes 11 arranged upright in a square shape in a plan view with connecting parts 12 connecting the pipes 11 by welding or the like. Each support part 5 is provided with connecting plates 13 on the top and bottom surfaces, and is assembled by connecting the top connecting plate 13 of the lower support part 5 to the bottom connecting plate 13 of the upper support part 5 by fasteners such as bolts and nuts.

[0021] Moreover, each support part 5 is connected and fixed to a columnar part 10 of the columnar object 3. There is no limitation on the fixing method, and a known method can be adopted. For example, as shown in FIG. 2, the support part 5 can be fixed by connecting a metal fitting 15 fixed to the support part 5 with a band 16 hung around the columnar part 10. In this way, the support 4 can raise and lower the base rod 2 while being stably supported by the columnar part 10, and the base rod 2 can also lift and lower the columnar part 10 and the support part 5.

[0022] In addition, the connecting parts 12 of each support part 5, which connect the pipes 11 extending in the vertical direction, also function as a foothold for workers, allowing them to raise and lower the platform rod 2 on the support part 5, and to raise and lower, as well as install and remove, the support parts 5 and the column-shaped parts 10.

[0023] [Lifting mechanism] The platform rod 2 is raised and lowered along the support pillar 4 by a lifting mechanism 6. The lifting mechanism 6 has a support carriage 22 and a driven carriage 24 to which the platform rod 2 is attached, and a rail section 23 that continues along the longitudinal direction of the support pillar 4, and the support carriage 22 and the driven carriage 24 run along the rail section 23, thereby enabling the platform rod 2 to be raised and lowered.

[0024] [Trolley] As shown in Fig. 3, the support dolly 22 supports the dolly 2 and has a mounting section 25 to which the middle section of the dolly 2 excluding the lower end section is attached, and a running section 26 that runs on the rail section 23. The mounting section 25 has a mounting plate 27 and a mounting band 28 that fixes the dolly to the mounting plate 27. One surface of the mounting plate 27 is a mounting surface 27a for the dolly 2, and the running section 26 is provided on the opposite side of the mounting surface 27a. The mounting band 28 is, for example, a U-shaped band, and is fixed to the mounting surface 27a by fasteners such as bolts and nuts. The dolly 2 is fixed to the mounting plate 27 by being fixed to the mounting surface 27a by the mounting band 28.

[0025] The running part 26 is provided on the opposite side of the mounting surface 27a of the mounting plate 27. The running part 26 has rollers 30 that roll on the rail part 23 and a support plate 31 that rotatably supports the rollers 30. The support plate 31 is erected in a direction perpendicular to the surface direction of the mounting plate 27. The support plate 31 supports the rollers 30 so that they roll in the longitudinal direction of the platform rod 2 attached to the mounting surface 27a. The running part 26 is provided with two support plates 31, and rollers 30 are provided on the outer sides of each support plate 31. It is preferable that each support plate 31 is provided with a plurality of rollers 30 spaced apart in the running direction. The upper surface of the support plate 31 of the support dolly 22 is an abutment surface with which a fixing pin 36 of the positioning mechanism 7 described later abuts.

[0026] The lifting mechanism 6 also has a driven bogie 24 on which the lower end of the platform bar 2 is placed and which is lifted and lowered. The same components as those of the support bogie 22 of the driven bogie 24 are given the same reference numerals and their details are omitted. As shown in FIG. 4, the driven bogie 24 has a mounting plate 27 formed in an L-shaped cross section, and a bottom plate portion 27b on which the end of the platform bar 2 is placed is formed on the mounting surface 27a side. The driven bogie 24 may have the end of the platform bar 2 placed in the longitudinal direction on the bottom plate portion 27b and may fix the platform bar 2 to the mounting surface 27a by a mounting band 28. The driven bogie 24 also has a rope locking portion 32, such as an eye nut, on the bottom plate portion 27b to which a lifting rope 29 of the platform bar 2 is attached. The lower surface of the support plate 31 of the driven bogie 24 becomes the abutment surface with which a fixing pin 36 of the positioning mechanism 7 described later abuts.

[0027] [Rail section] 5, the rail section 23 on which the rollers 30 roll is a tubular body with a rectangular cross section, and an open groove 33 is continuously formed in the longitudinal direction at the center in the width direction of one of the top faces 23a. As a result, both sides of the open groove 33 on the bottom face 23b and the top face 23a of the rail section 23 are areas on which the rollers 30 roll. In addition, the support plate 31 of the running section 26 of the rail section 23 is inserted into the open groove 33.

[0028] The rail portion 23 is attached to the support part 5 with its longitudinal direction aligned with the erection direction of the support part 5. When both ends of the rail portion 23 are open and the support parts 5 are connected vertically, as shown in FIG. 5, the rail portion 23 is connected to the rail portion 23 of the connected support part 5, and in this state is fixed by the connecting fittings 34. The connecting fittings 34 have abutment surfaces that abut against the bottom surface 23b and both side surfaces 23c of the rail portion 23 and are provided in a substantially U-shape, and each abutment surface abuts across the upper and lower ends of the continuous rail portion 23. The connecting fittings 34 may be attached in advance to the lower end of the rail portion 23 so that the abutment surfaces protrude from the lower end of the rail portion 23, and when connecting to the rail portion 23 of the existing support part 5, the upper end of the lower rail portion 23 may be fitted into each abutment surface.

[0029] The rail portion 23 has insertion holes 35 formed on both side surfaces 23c, through which fixing pins 36 of the positioning mechanism 7 described later are inserted. A plurality of insertion holes 35 are formed in the longitudinal direction of the rail portion 23. For example, the insertion holes 35 are formed at both end portions of the rail 23.

[0030] [Positioning mechanism] The platform bar 2 is fixed at a predetermined position by a positioning mechanism 7. The positioning mechanism 7 has a plurality of insertion holes 35 provided along the longitudinal direction of the rail portion 23, and fixing pins 36 inserted into the insertion holes 35, and fixes the position of the platform bar 2 by abutting the fixing pins 36 against the respective support plates 31 of the support bogie 22 and the driven bogie 24.

[0031] The insertion hole 35 is a hole that penetrates straight between both side surfaces of the rail portion 23, and is provided at the upper end, lower end, middle portion, etc. in the longitudinal direction of the rail portion 23. The fixing pin 36 may be any pin having the strength to support the weight of the support cart 22 to which the platform bar 2 is attached, and may be substituted for a bolt. When a bolt is used as the fixing pin 36, the bolt can be inserted into the insertion hole 35 and fixed with a nut to prevent it from coming out of the insertion hole 35.

[0032] FIG. 6 is a perspective view showing a state in which the lower surface of the support plate 31 of the driving bogie 24 is supported by the fixing pin 36 inserted into the insertion hole 35. As shown in FIG.

[0033] [Operation of each mechanism] Next, the operation of the lifting mechanism 6 and the positioning mechanism 7 will be described. As shown in Fig. 3, the running part 26 of the support cart 22 is introduced from the open end of the rail part 23 attached to the support column part 5. The support cart 22 runs on the rail part 23 by the rollers 30 rolling on both sides of the open grooves 33 on the bottom surface 23b and the top surface 23a. Similarly, as shown in Fig. 4, the running part 26 of the driving cart 24 is introduced into the rail part 23. After the driving cart 24 is introduced, a fixing pin 36 is inserted into an insertion hole 35 of the rail part 23 to prevent the running part 26 from coming off the open end of the rail part 23.

[0034] The support dolly 22 has the dolly 2 attached to a mounting surface 27a of a mounting plate 27 by a mounting band 28. It is preferable to fix the dolly 2 to the mounting plate 27 at two or more points spaced apart in the longitudinal direction of the dolly 2 by the mounting bands 28. The driven dolly 24 has a longitudinal end of the dolly 2 placed on the bottom plate portion 27b. It is preferable that the driven dolly 24 is also fixed to the mounting surface 27a by the mounting bands 28. The lifting mechanism 6 supports the lower end of the dolly 2 by the driven dolly 24 and supports it by the support dolly 22 spaced apart in the longitudinal direction, thereby enabling the dolly 2 to be lifted and lowered stably.

[0035] One end of the lifting rope 29 is attached to the rope locking portion 32 provided on the bottom plate portion 27b of the driven cart 24. The lifting rope 29 is hung over a second pulley 38 detachably attached to the uppermost support part 5, and the other end is pulled or let out by a worker on the ground. The second pulley 38 is attached in advance to the upper part of the uppermost support part 5 by a worker. By pulling the lifting rope 29 from the ground side, the platform bar 2 can be raised along the rail portion 23 together with the driven cart 24. Also, by letting out the lifting rope 29 from the ground side, the platform bar 2 can be lowered along the rail portion 23 together with the driven cart 24.

[0036] Prior to the lifting operation of the dolly 2, the positioning mechanism 7 inserts the fixing pin 36 into an insertion hole 35 provided at a position corresponding to the lifted position of the support dolly 22, so that the support plate 31 of the support dolly 22 is abutted against it. In addition, when the lifting of the support dolly 22 stops at the position where the fixing pin 36 is inserted, the fixing pin 36 is inserted into the insertion hole 35 provided below the drive dolly 24, so that the support plate 31 of the drive dolly 24 is locked. This makes it possible to fix the position of the dolly 2.

[0037] At this time, the tip of the platform rod 2 is positioned above the uppermost support part 5. The lifting device 1 can lift up and lower the column-shaped part 10 and the support part 5 attached to the hoisting rope 21 via the first pulley 20 attached to the tip of the platform rod 2.

[0038] [Pole erection process] Next, a description will be given of a pole erection process using the lifting device 1. First, as shown in Fig. 7, a position where the pole 3 is to be erected is excavated, and after appropriate concrete is poured, the lowest pole part 10a is installed in the excavated hole 41 using a tripod or the like. The lowest pole part 10a may be a single pole part 10 or a plurality of pole parts 10 joined together in advance, and is installed so that its upper part protrudes above the ground.

[0039] Next, after backfilling the excavation hole 41, the column part 10b is assembled to the upper part of the column part 10a protruding above ground as shown in Fig. 8. At this time, if the assembly work can be performed by workers on the ground, the column part 10b is hoisted up by a tripod or the like.

[0040] Next, as shown in Fig. 9, the lowest support part 5a is installed adjacent to the column-shaped part 10b, and the support part 5a is connected to the column-shaped parts 10a and 10b. At this time, a rail part 23 is attached to the support part 5a. In addition, the support carriage 22 to which the platform rod 2 is attached and the driven carriage 24 are introduced to the rail part 23, and the platform rod 2 is fixed to a predetermined position by the positioning mechanism 7. The lowest support part 5a may be composed of one support part 5, but since it is to be installed by a ground worker, it may be composed of two or more support parts 5 connected in advance.

[0041] Next, as shown in FIG. 10, the lifting rope 21 is hung on the first pulley 20 provided at the tip of the platform 2. The lifting rope 21 has one end attached to the column part 10c via the first pulley 20, and the other end supported by a ground worker. The other end of the lifting rope 21 may be pulled by an electric winch 42 provided on the support part 5a. The column part 10c is also attached to a surrender rope 43 supported by a ground worker. Then, the other end of the lifting rope 21 is pulled, so that the column part 10c is lifted up and assembled to the top of the column part 10b by the worker who climbed up on the support part 5a and the worker who climbed up on the existing column part 10b. After that, the lifting rope 21 and the surrender rope 43 attached to the column part 10c are removed.

[0042] 11 and 12, the hoisting rope 21 and the escort rope are attached to the support part 5b to which the rail part 23 is attached, and the other end of the hoisting rope 21 is pulled to lift up the support part 5b, and the upper connecting plate 13 of the support part 5a and the lower connecting plate 13 of the support part 5b are connected with fasteners such as bolts and nuts by a worker who has climbed onto the support part 5a. Also, the support part 5b is connected to the columnar part 10c by a worker on the support part 5a.

[0043] Next, the platform bar 2 is pulled up and fixed. First, if the fixing pin 36 is inserted above the support plate 31 of the support cart 22, the fixing pin 36 is removed. Next, as shown in Figs. 13 and 14, a second pulley 38 is attached to the upper part of the support part 5b, and the lifting rope 29 is hung across it. One end of the lifting rope 29, which passes through the second pulley 38, is attached to a rope stopper 32 provided on the bottom plate 27b of the driven cart 24, and the other end is supported by a ground worker. The other end of the lifting rope 29 may be pulled by an electric winch (not shown).

[0044] Also, the fixed pin 36 is inserted into the insertion hole 35 provided at the top of the rail part 23 of the support part 5b to prevent the support cart 22 from coming off. After that, the other end of the lifting rope 29 is pulled, so that the driving cart 24 runs on the rail part 23, and the cart rod 2 and the support cart 22 are raised. When the support plate 31 of the support cart 22 abuts against the fixed pin 36, the rise stops. After that, as shown in FIG. 15, the fixed pin 36 is inserted into the insertion hole 35 provided directly below the support plate 31 of the driving cart 24 to position the cart rod 2. As a result, the tip of the cart rod 2 is positioned above the support part 5b and the columnar part 10c. If the fixed pin 36 that prevented the driving cart 24 from falling before being lifted is inserted, the fixed pin 36 is removed.

[0045] In this way, according to the lifting device 1, the platform rod 2 is moved and fixed using the lifting mechanism 6 and the positioning mechanism 7, so unlike when the platform rod is attached, detached, or transported by human power, accidents involving the platform rod falling can be prevented and construction work can be carried out safely.

[0046] Next, as shown in FIG. 16, the column part 10d is attached to one end of the lifting rope 21, which is hung over the first pulley 20 provided at the tip of the platform bar 2, via the first pulley 20. The other end of the lifting rope 21 is supported by a ground worker. The column part 10d is attached to a surrender rope 43 supported by a ground worker. Then, the column part 10d is lifted up by pulling the other end of the lifting rope 21, and is assembled to the top of the column part 10c by a worker who has climbed up onto the support part 5b and a worker who has climbed up onto the existing column part 10c. After that, the lifting rope 21 and the surrender rope 43 attached to the column part 10d are removed. The support part 5b is connected to the assembled column part 10d by a metal fitting 15, a band 16, and the like. As shown in Figure K, since the support part 5b extends above the existing column-shaped part 10c, a worker who climbs up to the support part 5b is higher than the existing column-shaped part 10c, and can guide the lifted column-shaped part 10d, thereby enabling the lifting work of the column-shaped part 10d to be performed safely.

[0047] Similarly, the column part 10e is hoisted and assembled as shown in Fig. 17. At this time, since the support part 5b is connected and fixed to the existing column part 10d, the worker on the support part 5b can work in a stable state.

[0048] 18, the lifting rope 21 and the escort rope 43 are attached to the support part 5c to which the rail part 23 is attached, and the other end of the lifting rope 21 is pulled to lift up the support part 5c, and the upper connecting plate 13 of the support part 5b and the lower connecting plate 13 of the support part 5c are connected with fasteners such as bolts and nuts by a worker who has climbed up onto the support part 5b and an existing column-shaped part 10d. The support part 5c is also connected to the column-shaped part 10e.

[0049] Next, the lifting and fixing work of the platform 2 is performed. First, the fixing pin 36 inserted above the support plate 31 of the support platform 22 is removed. Next, a worker on the support column part 5c attaches the second pulley 38 with the lifting rope 29 hung over the top of the support column part 5c. Also, the fixing pin 36 is inserted into the insertion hole 35 provided at the top of the rail part 23 of the support column part 5c to prevent the support platform 22 from coming off. Then, as shown in FIG. 19, the other end of the lifting rope 29 is pulled, causing the driving platform 24 to run on the rail part 23 and lifting the platform 2. When the support plate 31 of the support platform 22 abuts against the fixing pin 36, the lifting stops, and the fixing pin 36 is inserted into the insertion hole 35 provided directly below the support plate 31 of the driving platform 24 to position the platform 2. As a result, the tip of the base rod 2 is positioned above the support part 5c and the column-shaped part 10e.

[0050] Similarly, the steps of lifting and assembling the column part 10, lifting and connecting the support part 5, and lifting and fixing the base rod are repeated in this order. As a result, the column 3 and the support 4 adjacent to it are erected as shown in Fig. 20.

[0051] In the above-described example, the tip of the base rod 2 was raised by the height of the two columnar parts 10, and the two columnar parts 10 were lifted and assembled, followed by lifting and connecting the support part 5 and pulling up and fixing the base rod. However, in the present technology, the lifting and assembly work of the columnar parts 10, the lifting and connecting work of the support part 5, and the pulling up and fixing work of the base rod may be performed alternately.

[0052] [Support pillar removal process] Next, the support column 4 is removed. First, the lifting rope 29 is reeled out to lower the support cart 22 and the driven cart 24 from the rail section 23 of the support column part 5f located at the top to the rail section 23 of the support column part 5e located directly below the support column part 5f. A fixing pin 36 is inserted in advance into the rail section 23 of the support column part 5e, and the cart 24 is lowered to a predetermined position. As a result, the tip of the platform rod 2 is positioned at the top of the support column part 5f.

[0053] Next, the hoisting rope 21 and the escort rope 43 are tied to the uppermost pillar part 5f. The connection between the pillar part 5f and the pillar part 10 is released by, for example, removing the band that is hung around the pillar part 10 that is connected to the metal fitting 15 fixed to the pillar part 5f. Furthermore, the fastening parts that connect the pillar part 5f and each connecting plate 13 of the pillar part 5e provided at the lower part of the pillar part 5f are removed, and the connecting metal fittings 34 that connect the rail parts 23 of the pillar parts 5e, 5f are removed, and the connection is released.

[0054] Next, the hoisting rope 21 is let out to suspend the pillar part 5f to the ground. Similarly, as shown in Fig. 21, the support cart 22 and the driving cart 24 are lowered, the pillar part 5 is disconnected, and the pillar part 5 is suspended, in that order. Finally, as shown in Fig. 22, the pillar part 5a installed on the ground is removed together with the platform 2 by a ground worker, and the pillar erection process is completed (Fig. 23). [Explanation of symbols]

[0055] 1 lifting device, 2 platform bar, 3 column-shaped object, 5 support part, 6 lifting mechanism, 7 positioning mechanism, 10 column-shaped part, 11 pipe, 12 connecting part, 13 connecting plate, 15 metal fitting, 16 band, 20 first pulley, 21 lifting rope, 22 support cart, 23 rail part, 23a top surface, 23b bottom surface, 23c side surface, 24 driving cart, 25 mounting part, 26 running part, 27 mounting plate, 27a mounting surface, 27b bottom plate part, 28 mounting band, 29 lifting rope, 30 roller, 31 support plate, 32 rope locking part, 33 opening groove, 34 connecting metal fitting, 35 insertion hole, 36 fixing pin, 41 drilling hole, 42 electric winch, 43 execution rope

Claims

1. In a lifting device that raises and lowers a platform rod for lifting or lowering a member along a column-shaped object, A stand and A support pillar is provided along the columnar object, The support pillar is provided with a lifting mechanism for lifting and lowering the base rod and a positioning mechanism for fixing the base rod at a predetermined position, The lifting mechanism includes a carriage to which the carriage rod is attached and a rail portion that is continuous along the longitudinal direction of the support pillar, The carriage travels along the rail portion to move the platform up and down, the positioning mechanism has a plurality of insertion holes provided along a longitudinal direction of the rail portion, and a fixing pin inserted into the insertion holes, The position of the platform rod is fixed by abutting the fixing pin against the platform. Lifting device.

2. A lifting device for raising and lowering a platform rod for lifting or lowering a member along a column-shaped object, A stand and A support pillar is provided along the columnar object, The support pillar is provided with a lifting mechanism for lifting and lowering the base rod and a positioning mechanism for fixing the base rod at a predetermined position, The lifting mechanism includes a carriage to which the carriage rod is attached and a rail portion that is continuous along the longitudinal direction of the support pillar, The carriage travels along the rail portion to move the platform up and down, A pulley member is removably attached to the upper portion of the support column, The cart is raised and lowered by a rope attached to one end of the rope and hung on the pulley member. Lifting device.

3. 3. The lifting device according to claim 2, wherein the lifting mechanism includes a support cart that supports an intermediate portion of the carrier and a driven cart on which the lower end of the carrier is placed, and the rope is attached to the driven cart.

4. A lifting device for raising and lowering a platform for lifting or lowering a member along a column-shaped object, A stand and A support pillar is provided along the columnar object, The support pillar is provided with a lifting mechanism for lifting and lowering the base rod and a positioning mechanism for fixing the base rod at a predetermined position, The lifting mechanism includes a carriage to which the carriage rod is attached and a rail portion that is continuous along the longitudinal direction of the support pillar, The carriage travels along the rail portion to move the platform up and down, The cart has a running section provided with a plurality of rollers that run on the rail section, The rail portion has a groove portion along which the roller runs, The running portion is inserted into the groove from an opening provided at an end of the groove. Lifting device.

5. The cart has a running section provided with a plurality of rollers that run on the rail section, The rail portion has a groove portion along which the roller runs, The lifting device according to any one of claims 1 to 3, wherein the running portion is inserted into the groove from an opening provided at an end of the groove.

6. The lifting device according to any one of claims 1 to 5, wherein the support is fixedly connected to the columnar object.

7. The lifting device according to any one of claims 1 to 6, wherein the pillar-shaped object is configured by assembling a plurality of pillar-shaped parts.

8. The lifting device according to any one of claims 1 to 7, wherein the support is configured by assembling a plurality of support parts.

9. A method for raising and lowering a platform rod for lifting or lowering a member along a columnar object or a columnar part constituting the columnar object, comprising: A stand and A dolly with a dolly bar attached; A support pillar erected along the columnar object or the columnar part; a rail portion connected to the support and continuing along the longitudinal direction of the support, A lifting method in which the cart moves up and down by running along the rail portion.

10. A support carriage supporting an intermediate portion of the carriage and a driving carriage supporting a lower end of the carriage are provided. One end of a rope stretched over a pulley provided on the support is attached to the driving cart, The method for raising and lowering the platform according to claim 9, wherein the platform is raised and lowered by the rope.

11. In the column-shaped object stand rod construction method, the column parts that make up the column are lifted up or lowered by a stand rod, The above-mentioned stand rod, A dolly with a dolly bar attached; A support pillar erected along the columnar object or the columnar part; a rail portion connected to the support and continuing along the longitudinal direction of the support, A platform construction method in which the platform is raised and lowered by the carriage running along the rail portion.

Images