JP7609403B2 - Lifting device and lifting method - Google Patents

Description

Patent Law Article 30, Paragraph 2 applied Test date: July 12, 2020 Test location: Tokyo System Tokki Co., Ltd. Construction Headquarters (1-423-9 Ogawacho, Kodaira City, Tokyo)

This technology relates to a lifting device and a lifting method that raises and lowers a platform rod that lifts or lowers a component along a column-shaped object.

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

The stacking method includes the crane lifting method, in which the columnar parts of the tower are hoisted with a crane or other large heavy equipment, and the stand pole method, in which a rod-shaped component called a stand pole is fixed to an existing columnar part, and the columnar part is hoisted by a wire rope attached to a pulley attached to the stand pole. The stand pole method allows the 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 equipment.

JP 2004-204506 A

With 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 there. During this type of work, care must be taken to prevent the stand pole from accidentally falling (see Figure 24). For example, in construction work for relatively low-height steel towers in mountainous areas or on narrow land, the stand pole is attached, detached, and transported by hand, so measures to prevent it from falling are particularly required.

Therefore, the objective of this technology is to provide a lifting device and a lifting method that can safely raise and lower the platform.

In order to solve the above-mentioned problems, the lifting device of the present technology is a lifting device that raises and lowers a platform bar that hoists or suspends a component along a pillar-shaped object, and is equipped with the platform bar and a support pillar that is erected along the pillar-shaped object, and the support pillar is provided with a lifting mechanism that raises and lowers the platform bar and a positioning mechanism that fixes the platform bar at a predetermined position , the lifting mechanism has a cart to which the platform bar is attached and a rail portion that continues along the longitudinal direction of the support pillar, and the platform bar can be raised and lowered by the platform bar running along the rail portion, and the positioning mechanism has a plurality of insertion holes provided along the longitudinal direction of the rail portion and a fixing pin that is inserted into the insertion holes, and the position of the platform bar is fixed by abutting the fixing pin against the cart .

The lifting method according to the present technology is a method for lifting and lowering a platform rod for lifting or lowering a member along a columnar object or a columnar part that constitutes the columnar object, and includes a platform rod, a cart to which the platform rod is attached, a support erected along the columnar object or the columnar part, and a rail section that is connected to the support and continues along the longitudinal direction of the support, and the platform rod is raised and lowered by the cart running along the rail section.

With this technology, the platform is moved and fixed using a lifting mechanism and a positioning mechanism, which, unlike attaching, detaching, or transporting the platform by human power, prevents the platform from falling and allows construction work to be carried out safely.

FIG. 1 is a diagram showing a columnar object formed by assembling columnar parts. FIG. 2 is a plan view showing a state in which the support part is fixed to the column-shaped part. FIG. 3 is an exploded perspective view showing the support carriage. FIG. 4 is a perspective view showing a manual trolley. FIG. 5 is a perspective view illustrating the connection of the rail portions. FIG. 6 is a perspective view showing a state in which the driving bogie is fixed by the positioning mechanism. FIG. 7 is a diagram showing the process of installing the bottom pillar part in the drilled hole. FIG. 8 is a diagram showing a process of assembling a column part to an upper part of the column part protruding above the ground. FIG. 9 is a diagram showing the process of placing the bottom support part adjacent to the column-shaped part. FIG. 10 is a diagram showing a process of lifting the column-shaped part by the lifting device. FIG. 11 is a diagram showing a process of lifting the support part by the lifting device. FIG. 12 is a diagram showing a process of lifting the support part by the lifting device. FIG. 13 is a diagram showing a process of lifting the platform rod by the lifting device. FIG. 14 is a diagram showing a process of lifting the platform rod by the lifting device. FIG. 15 is a diagram showing a process of fixing the platform rod at a raised position by the lifting device. FIG. 16 is a diagram showing a process of lifting the column-shaped part by a lifting device. FIG. 17 is a diagram showing a process of lifting the column-shaped part by a lifting device. FIG. 18 is a diagram showing a process of lifting the support part by the lifting device. FIG. 19 is a diagram showing a process of lifting the platform rod by the lifting device. FIG. 20 is a diagram showing a column-shaped object erected by the platform pole method using a lifting device. FIG. 21 is a diagram showing a process of lifting the support part by a lifting device. 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. FIG. 23 shows the state after the pillars have been erected and the supports have been removed. FIG. 24 is a diagram showing an accident in which the platform rod falls.

Below, 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 without departing from the spirit 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 one another.

The lifting device 1 to which this technology is applied is a lifting device that raises and lowers a platform rod that lifts or lowers a component along a column-shaped object, and the lifting device 1 is equipped with a platform rod 2 and a support pole 4 that is connected and fixed to the column-shaped object 3, and the support pole 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.

[Columnar object]
The columnar structure 3 is a prefabricated tower used for various purposes such as a power transmission and distribution line column, an antenna column, a lighting column, a wireless column, etc., and is constructed by assembling a number of 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.

For example, as shown in FIG. 1, the columnar object 3 is formed by connecting multiple 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 that is lifted also becomes smaller in 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 of constant thickness. There are also no particular restrictions on the shape of the columnar object 3, and it may be a square prism or other polygonal cross section in addition to a cylinder.

In addition, each columnar part 10 is connected by fitting the tip of the columnar part 10 to the base of another columnar part 10 that is to be assembled to the top. There are no particular limitations on the method of connecting each columnar part 10, and a connecting method other than fitting may be used.

It is also 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 carry out the erection work: one who climbs the support part 5 (described below) and the other who climbs the column part 10.

The columnar parts 10 of the columnar object 3 include functional components such as lighting and antennas in addition to the components that make up the column. The lifting device 1 according to the present technology can also lift and lower components that perform functions according to the application of these columnar objects 3.

There are no particular limitations on the material of the pillar 3, and it can be designed appropriately depending on the purpose, height, etc. For example, the pillar 3 is a steel tower.

[Stand pole]
The platform 2 for hoisting these columnar 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 the first pulley 20 hoists and lowers the columnar parts 10 of the columnar object 3 and the support parts 5 of the support 4 (see FIG. 11).

[Support]
The support 4 is provided adjacent to the columnar object 3, and is used to raise and lower the platform 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 other shaped columnar body, 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. In addition, each support part 5 is provided with connecting plates 13 on the top and bottom surfaces, and is assembled by connecting the upper connecting plate 13 of the lower support part 5 to the lower connecting plate 13 of the upper support part 5 by fasteners such as bolts and nuts.

Each support part 5 is connected and fixed to a columnar part 10 of the columnar object 3. There are no limitations on the fixing method, and any known method can be used. 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. This allows the support 4 to raise and lower the base rod 2 while being stably supported by the columnar part 10, and also allows the base rod 2 to lift and lower the columnar part 10 and support part 5.

The connecting parts 12 that connect the pipes 11 extending in the vertical direction of each support part 5 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 columnar parts 10.

[Lifting mechanism]
The platform 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 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 2 to be raised and lowered.

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

The running section 26 is provided on the opposite side of the mounting surface 27a of the mounting plate 27. The running section 26 has a roller 30 that rolls on the rail section 23 and a support plate 31 that rotatably supports the roller 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 roller 30 so that it rolls in the longitudinal direction of the platform 2 attached to the mounting surface 27a. The running section 26 is provided with two support plates 31, and rollers 30 are provided on the outer side 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 cart 22 is the contact surface with which the fixed pin 36 of the positioning mechanism 7 described later comes into contact.

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

[Rail section]
5, the rail portion 23 on which the rollers 30 roll is a cylindrical 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 surfaces 23a. As a result, both sides of the open groove 33 on the bottom surface 23b and the top surface 23a of the rail portion 23 are areas in which the rollers 30 roll. In addition, the support plate 31 of the running portion 26 of the rail portion 23 is inserted into the open groove 33.

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. In addition, 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 roughly 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 extend beyond the lower end of the rail portion 23, and when connecting to the rail portion 23 of an existing support part 5, the upper end of the lower rail portion 23 may be fitted into each abutment surface.

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 below are inserted. A plurality of insertion holes 35 are formed along the longitudinal direction of the rail portion 23. For example, the insertion holes 35 are formed at both ends of the rail 23.

[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.

The insertion hole 35 is a hole that penetrates straight through both sides of the rail section 23, and is provided at the upper end, lower end, middle part, etc. in the longitudinal direction of the rail section 23. The fixing pin 36 may be any pin that has 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.

Figure 6 is a perspective view showing the state in which the underside of the support plate 31 of the driving bogie 24 is supported by the fixing pin 36 inserted through the insertion hole 35.

[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 driven cart 24 is introduced into the rail part 23. After the driven 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.

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

One end of the lifting rope 29 is attached to the rope hook 32 provided on the bottom plate 27b of the driven cart 24. The lifting rope 29 is hung over a second pulley 38 that is detachably attached to the topmost 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 top of the topmost 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 part 23 together with the driven cart 24. In addition, by letting out the lifting rope 29 from the ground side, it can be lowered along the rail part 23 together with the driven cart 24.

Prior to the lifting of the platform 2, the positioning mechanism 7 inserts the fixed pin 36 into an insertion hole 35 provided at a position corresponding to the lifted position of the support platform 22, so that the support plate 31 of the support platform 22 is abutted against it. In addition, when the lifting of the support platform 22 stops at the position where the fixed pin 36 is inserted, the fixed pin 36 is inserted into an insertion hole 35 provided below the driven platform 24, so that the support plate 31 of the driven platform 24 is locked. This allows the position of the platform 2 to be fixed.

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

[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 appropriate concrete is poured, and then 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.

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

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 section 23 is attached to the support part 5a. In addition, a support carriage 22 to which a platform rod 2 is attached and a driven carriage 24 are introduced to the rail section 23, and the platform rod 2 is fixed in a predetermined position by a positioning mechanism 7. The lowest support part 5a may be made of a single support part 5, but since it is installed by a ground worker, it may be made of two or more support parts 5 connected in advance.

Next, as shown in FIG. 10, the lifting rope 21 is hung over 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, by pulling the other end of the lifting rope 21, 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.

Next, as shown in Figures 11 and 12, the lifting rope 21 and the escort rope are attached to the support part 5b to which the rail section 23 is attached, and the other end of the lifting rope 21 is pulled to lift up the support part 5b, and a worker who has climbed onto the support part 5a connects the upper connecting plate 13 of the support part 5a to the lower connecting plate 13 of the support part 5b with fasteners such as bolts and nuts. The worker on the support part 5a also connects the support part 5b to the columnar part 10c.

Next, the platform bar 2 is raised 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 Figures 13 and 14, a second pulley 38 is attached to the top of the support part 5b, and the lifting rope 29 is hung across it. One end of the lifting rope 29, which is connected via 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).

In addition, a fixed pin 36 is inserted into an insertion hole 35 provided at the top of the rail portion 23 of the support part 5b to prevent the support cart 22 from falling out. After that, the other end of the lifting rope 29 is pulled, causing the driven cart 24 to run on the rail portion 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. Then, as shown in FIG. 15, the cart rod 2 is positioned by inserting the fixed pin 36 into an insertion hole 35 provided directly below the support plate 31 of the driven cart 24. 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 driven cart 24 from falling before being lifted is inserted, the fixed pin 36 is removed.

In this way, with the lifting device 1, the platform rod 2 is moved and fixed using the lifting mechanism 6 and positioning mechanism 7. This prevents the platform rod from falling, unlike when the platform rod is attached, detached, or transported by human power, and allows construction work to be carried out safely.

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 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 also 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 the support part 5b and a worker who has climbed up 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 also connected to the assembled column part 10d by metal fittings 15, bands 16, etc. As shown in Fig. 1G, because the support part 5b extends above the existing column-shaped part 10c, the worker who climbs up to the support part 5b is higher than the existing column-shaped part 10c, so the lifted column-shaped part 10d can be guided and the work of lifting the column-shaped part 10d can be performed safely.

In the same manner, as shown in FIG. 17, the column part 10e is lifted and assembled. At this time, the support part 5b is connected and fixed to the existing column part 10d, so the worker on the support part 5b can work in a stable position.

Next, as shown in FIG. 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 to the support part 5b or the existing column part 10d. The support part 5c is also connected to the column part 10e.

Next, the work of lifting and fixing 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 stretched across it to the top of the support column part 5c. The fixing pin 36 is also 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 falling out. Then, as shown in FIG. 19, the other end of the lifting rope 29 is pulled, causing the driven 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 platform 2 is positioned by inserting the fixing pin 36 into the insertion hole 35 provided directly below the support plate 31 of the driven platform 24. As a result, the tip of the base rod 2 is positioned above the support part 5c and the columnar part 10e.

Then, the same process is repeated in this order: lifting and assembling the column part 10, lifting and connecting the support part 5, and lifting and fixing the base rod. As a result, the column 3 and the support 4 adjacent to it are erected, as shown in Figure 20.

In the above example, the tip of the base rod 2 is raised by the height of the two columnar parts 10, and the two columnar parts 10 are lifted and assembled, after which the support part 5 is lifted and connected, and the base rod is raised and fixed. However, in this technology, the lifting and assembly of the columnar parts 10, the lifting and connection of the support part 5, and the lifting and fixing of the base rod may be performed alternately.

[Support 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 part 5f located at the top to the rail section 23 of the support part 5e located directly below the support part 5f. A fixing pin 36 is inserted in advance into the rail section 23 of the support part 5e, and the cart 24 is lowered to a predetermined position. As a result, the tip of the platform 2 is positioned at the top of the support part 5f.

Next, the lifting rope 21 and the escort rope 43 are tied to the topmost 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 fittings 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 bottom of the pillar part 5f are removed, and the connecting metal fittings 34 that connect the rail parts 23 of each pillar part 5e, 5f are removed, and the connection is released.

Next, the hoisting rope 21 is let out to suspend the support part 5f to the ground. As shown in FIG. 21, the support cart 22 and the driving cart 24 are lowered, the support part 5 is disconnected, and the support part 5 is suspended in the same manner, in that order. Finally, as shown in FIG. 22, the support part 5a installed on the ground is removed together with the platform 2 by a ground worker, and the pole erection process is completed (FIG. 23).

1 Lifting device, 2 Platform bar, 3 Pillar-shaped object, 5 Support part, 6 Lifting mechanism, 7 Positioning mechanism, 10 Pillar part, 11 Pipe, 12 Connection part, 13 Connection 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 Drive 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 Connection metal fitting, 35 Insertion hole, 36 Fixing pin, 41 Drilling hole, 42 Electric winch, 43 Execution rope

Claims (11)

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. 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,
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. 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. 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 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 portion through an opening provided at an end of the groove portion .
Lifting device. 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. The lifting device according to any one of claims 1 to 5 , wherein the support is fixedly connected to the columnar object. 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. The lifting device according to any one of claims 1 to 7 , wherein the support is configured by assembling a plurality of support parts. 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 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. 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. 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.

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