Gondola device

Abstract

To provide a gondola device that facilitates transportation to mountain areas and narrow places while using a conventional gondola.SOLUTION: A gondola device comprises: a circular rail attached on a platform and arranged so as to surround a steel tower body in order to be attached on a steel tower provided with the platform and the steel tower body; a suspension device movably arranged along the circular rail; and a gondola arranged on the suspension device so as to be suspended therefrom.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a gondola device that is attached to a steel tower having a platform and a steel tower body. [Background technology]

[0002] The number of steel towers, especially those used for mobile phone base stations, is increasing, and the maintenance work for these towers is also increasing. In particular, these towers are exposed to the elements, and there is an increasing demand for repainting the surface.

[0003] In such cases, the steel scaffolding method or the gondola method using a gondola is used for the painting and repair work of radio towers. For example, in the steel scaffolding method, the materials for the scaffolding must be brought in to set up the scaffolding, and depending on the height of the radio tower, the materials or equipment required to set up the scaffolding surrounding the radio tower may become large, which may cause problems in bringing them in. In particular, in the case of radio towers, they may be installed in mountainous areas or narrow areas, and it is extremely inconvenient to transport a large amount of materials to such places. Furthermore, there are many steps to assemble the scaffolding, and the construction period is expected to be long, so there was a demand for efficiency in painting and repair work.

[0004] In addition, to install a gondola on the radio tower and repaint it, i.e., to perform the gondola method, a pier is installed on the radio tower and a gondola is suspended from it to perform the repainting work. In this way, the gondola method is a rational method in that it requires less materials to assemble before construction compared to steel scaffolding, and the transportation burden and preparation before construction are light. In this method, the gondola is generally raised and lowered by a suspension wire fixed to the platform to perform the painting work.

[0005] However, in this gondola method, painting work is carried out by moving a gondola up and down using a hoisting wire fixed to the platform, but because the hoisting wire is fixed to the suspension point, the gondola can only move up and down. Therefore, in order to paint the entire radio tower, it is necessary to change the hoisting wire for each work area, which is called re-laying. However, this re-laying is a major burden on the construction work, so there is a demand for more efficient painting and repair work.

[0006] Therefore, JP 2002-038709 A discloses a circular gondola device for cylindrical tower construction, which is used to paint, inspect, and repair various cylindrical towers such as cylindrical power transmission towers, radio towers for mobile phones, and water towers, and which is characterized in that the gondola body is formed into a circular donut shape so that it is arranged around the cylindrical tower, a winding winder device is installed in the gondola body, and the gondola body is raised and lowered by winding up a suspension wire connected to this winding winder device.

[0007] The above invention allows a worker aboard the gondola body to carry out painting work without the need for so-called repainting. The above-mentioned circular doughnut-shaped gondola body 1 can be disassembled into three arc-shaped parts, so the above publication states that it is extremely easy to transport the gondola body 1 on narrow roads or to assemble and disassemble the components within a narrow site.

[0008] However, even though the gondola body 1 is disassembled into three parts, the disassembled gondola body is still large and not as compact as conventional gondolas, and it is not easy to transport it to mountainous areas or narrow areas where radio towers are installed. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2002-038709 A Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a gondola device which can be easily transported to mountainous areas or narrow areas while still using a conventional gondola. [Means for solving the problem]

[0011] In order to solve the above problems, the gondola device in a first aspect has a circular rail that is attached to a steel tower having a platform and a steel tower body and is arranged to surround the steel tower body, a suspension device that is arranged so as to be movable along the circular rail, and a gondola that is arranged so as to be suspended from the suspension device.

[0012] In order to solve the above-mentioned problems, the gondola device in the second aspect has a circular rail that is attached to a steel tower having a platform and a steel tower body and is arranged to surround the steel tower body, a plurality of suspension devices that are arranged movably along the circular rail, and gondolas that are respectively arranged so as to be suspended from the plurality of suspension devices.

[0013] In order to solve the above-mentioned problems, the gondola device in the third aspect is adapted to be attached to a steel tower having a platform and a steel tower body, and comprises a circular rail that is attached to the platform and arranged to surround the steel tower body, a suspension device that is arranged movably along the circular rail, a first gondola that is arranged to be suspended from the suspension device, a second circular rail that is attached to the platform and arranged to surround the steel tower body, a suspension device that is movably attached to the second circular rail, and a second gondola that is arranged to be suspended from the second suspension device.

[0014] In order to solve the above problems, the gondola device in a fourth aspect has a circular rail that is attached to a steel tower having a platform and a steel tower body and is arranged to surround the steel tower body, a suspension device that is attached so as to be movable along the circular rail, and a gondola that is arranged to be suspended from the suspension device, the suspension device having a primary suspension section and a secondary suspension section, and the primary suspension section and the secondary suspension section suspend the gondola.

[0015] In order to solve the above-mentioned problems, the gondola device in the fifth aspect has a circular rail that is attached to a steel tower having a platform and a steel tower body and is arranged to surround the steel tower body, a plurality of suspension devices that are arranged movably along the circular rail, and gondolas that are respectively arranged to be suspended from the plurality of suspension devices, the plurality of suspension devices having a plurality of main suspension sections and a plurality of secondary suspension sections, and the plurality of main suspension sections and the plurality of secondary suspension sections suspend the plurality of gondolas, respectively.

[0016] In order to solve the above problems, a gondola device in a sixth aspect is provided for mounting on a steel tower having a platform and a steel tower body, and includes a circumferential rail that is attached to the platform and arranged to surround the steel tower body, a suspension device that is arranged to be movable along the circumferential rail, a first gondola that is arranged to be suspended from the suspension device that is arranged to be movable along the circumferential rail, a second circumferential rail that is attached to the platform and arranged to surround the steel tower body, and a suspension device that is arranged to be movable around the second circumferential rail. The first gondola has a first suspension device and a second gondola arranged to be suspended from the suspension device arranged movably along the second circular rail, and the suspension device arranged movably along the second circular rail each have a main suspension section and a secondary suspension section, and the main suspension section and the secondary suspension section arranged movably along the circular rail suspend the first gondola, and the main suspension section and the secondary suspension section arranged movably along the second circular rail suspend the second gondola.

[0017] In order to solve the above-mentioned problems, the gondola device in a seventh aspect is the first, second, fourth and fifth aspects, further comprising a power cord winding device for winding up a power cord for supplying electricity to the suspension device.

[0018] In order to solve the above-mentioned problems, the gondola device in an eighth aspect is such that, in the third and sixth aspects, the first and second gondolas further have a power cord winding device for winding up a power cord for supplying electricity to the suspension device. 7. A gondola apparatus as claimed in claim 3 or 6.

[0019] In order to solve the above-mentioned problems, the gondola device in a ninth aspect is similar to the third and sixth aspects in that the suspension device has a connecting portion which connects the main suspension portion and the secondary suspension portion, and the first gondola and the second gondola further have a power cord winding device which winds up a power cord for supplying electricity to the suspension device. Effect of the Invention

[0020] Since the present invention is constructed and operates as described above, it is possible to provide a gondola apparatus that can be easily transported to mountainous areas or narrow areas while still using a conventional gondola. [Brief description of the drawings]

[0021] [Figure 1] This is a conceptual diagram of a gondola device attached to a steel tower. [Diagram 2] 1A is a conceptual plan view of the gondola device of the first embodiment attached to a platform, and FIG. 1B is a conceptual side view of the gondola device of the first embodiment attached to a platform. [Diagram 3] 1A is a conceptual diagram of a state in which a gondola is suspended from a primary suspension part of a suspension device, and FIG. 1B is a conceptual diagram of a state in which a gondola is suspended from a secondary suspension part of a suspension device. [Figure 4] A is a schematic front view of the main suspension unit. B is a schematic right side view of A. [Diagram 5] 1A is a schematic front view of the secondary hanging unit, and FIG. [Figure 6] A is a schematic front view of the gondola. B is a schematic side view of the gondola. C is a cross-sectional view of A taken along the line VIIC-VIIC. [Figure 7] 1A is a schematic plan view of a gondola device according to a second embodiment attached to a platform, and FIG. 1B is a schematic side view of a gondola device according to a second embodiment attached to a platform. [Figure 8] 1A is a schematic plan view of a gondola device according to a third embodiment attached to a platform, and FIG. 1B is a schematic side view of a gondola device according to a third embodiment attached to a platform. [Figure 9] 13A is a schematic plan view of a gondola device according to a fourth embodiment attached to a platform, and FIG. 13B is a schematic side view of a gondola device according to a fourth embodiment attached to a platform. [Figure 10] FIG. 1 is a conceptual diagram of a hanger winch. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] A gondola device 10 of the first embodiment will be described below with reference to the illustrated embodiment. The gondola device 10 of the first embodiment is attached to a steel tower 500 having a platform 600 and a steel tower body 550, and has a circular circumferential rail 20 attached to the platform 600, a suspension device 40 movably attached to the circular circumferential rail 20, and a gondola 80 suspended from the suspension device 40. When the gondola device 10 is attached to a steel tower 500 having a plurality of platforms 600 (described later), the gondola device 10 can be attached to the platform 600 located at the lowest position.

[0023] The steel tower 500 is preferably a radio tower used, for example, as a mobile phone base station, and preferably comprises a steel tower main body 550 and a platform 600 that is circular in plan view and surrounds the steel tower main body 550, and the steel tower 500 is preferably a so-called cylinder steel tower, a triangular rigid frame steel tower, or an angle steel tower.

[0024] The platform 600 has a platform main body 610 having a circular shape in a plan view, and a platform mounting part 650 for mounting the platform main body 610 to the tower main body 550. The platform 600 can be equipped with an antenna (not shown). A circular rail 20 is attached to the platform 600 having a circular shape in a plan view so as to be suspended.

[0025] The circumferential rail 20 is arranged so as to surround, i.e., to go around, the tower body 550. The circumferential rail 20 of this embodiment is preferably circular in plan view, but is not limited thereto as long as the suspension device 40 described later can go around the tower body 550, and may be elliptical or polygonal in plan view (not shown).

[0026] The circulating rail 20 also has a ring-shaped rail main body 21 and suspenders 25 that suspend the rail main body 21 from the platform 600. Specifically, the rail main body 21, which is ring-shaped in plan view, is attached to a platform mounting portion 650 of the platform 600, which is cross-shaped in plan view, via a plurality of suspenders 25. The rail main body 21 is preferably made of a so-called H-beam.

[0027] The suspension device 40 is attached so as to be movable along the circumferential rail 20, and can move around the periphery of the tower body 550 while suspending the gondola 80. In addition, the suspension device 40 preferably has a pair of a main suspension part 50 and a secondary suspension part 60.

[0028] Main suspension unit 50 is preferably, for example, a device called a three-phase electric trolley, and is capable of moving along circulating rail 20. That is, main suspension unit 50 has drive unit 52 consisting of a motor, and drive unit 52 drives wheel units 53, 53. Wheel units 53, 53 are disposed so as to be in contact with rail main body 21, and main suspension unit 50 can move along rail 20 as wheel units 53, 53 rotate.

[0029] Furthermore, the main suspension unit 50 has a rope 56 connected to the main suspension device 55. The rope 56 is for suspending the gondola 80.

[0030] The secondary suspension unit 60 is preferably a device called a manual gear trolley, and can move along the circulating rail 20. That is, it moves so as to circle around the tower body 550. The secondary suspension unit 60 has wheel portions 63, 63, and the wheel portions 63, 63 are arranged so as to contact the rail body 21.

[0031] Further, the secondary suspending section 60 has a rope 66 connected to the secondary suspending device 65. The rope 66 is for suspending the gondola 80.

[0032] Furthermore, suspension device 40 has a connecting portion 70. Connecting portion 70 determines the distance between primary suspension portion 50 and secondary suspension portion 60, and is preferably a rod-shaped member. Support portion 70 is connected to connect primary suspension device 55 of primary suspension portion 50 and secondary suspension device 65 of secondary suspension portion 60.

[0033] In this way, the main suspension unit 50 and the secondary suspension unit 60 are connected by the connecting unit 70, and when the drive unit 52 of the main suspension unit 50 in the suspension device 40 is driven, the main suspension unit 50 moves along the circular rail 20, and the secondary suspension unit 60 connected to the connecting unit 70 can follow the movement of the main suspension unit 50, so that the suspension device 40 can move the gondola 80 around the tower body 550 along the circular rail 20.

[0034] The gondola 80 is for a worker to board when performing painting repair work, for example, and has a box-shaped gondola main body 81. The gondola main body 81 itself can be the same as a conventional one. In addition, it is preferable that the gondola main body 81 has a space for one or more workers to work. In addition, the gondola 80 has a pair of winding devices 85, 85. The pair of winding devices 85, 85 are for winding up the ropes 56, 66 for suspending the gondola 80, respectively, and the pair of winding devices 85, 85 can move the gondola 80 in the up and down directions by winding up the ropes 56, 66, respectively. In addition, the pair of winding devices 85, 85 are arranged in the box-shaped gondola main body 81. In addition, the gondola 80 has wheel parts 89 that serve as wheels at the four corners of the bottom 88.

[0035] The gondola 80 has power cord winding devices 90, 90 that wind up the power cord that supplies electricity to drive the main suspension unit 50 in the suspension device 40. Since the power cord winding devices 90, 90 are arranged outside the gondola body 81, the space in which the worker can work is not reduced, and the space can be effectively utilized. In addition, the worker is relieved from the task of winding up the power cord. The power cord can be connected to a battery (not shown). Or, it can be connected to a power source arranged on the ground. In this way, the power source can be secured.

[0036] The power cord that supplies electricity to drive the main suspension unit 50 in the suspension device 40 has a different required length depending on the up and down movement of the gondola 80, so by winding up the power cord appropriately using power cord winding devices 90, 90, it is possible to prevent the work space of the gondola from being encroached upon. Furthermore, without the power cord winding devices 90, 90, the worker would have to store the power cord on the gondola, which would be a heavy workload, but this workload can be reduced.

[0037] The gondola 80 in the gondola device 10 of the first embodiment having the above-mentioned configuration moves around the tower main body 550 on the hanging device 40, and also moves in the vertical direction of the tower main body 550 by winding up the ropes 56, 66 respectively using a pair of winding devices 85, 85, thereby making it possible to improve the efficiency of painting renovation work on the tower 500.

[0038] Also, the gondola device 10 of the first embodiment is different from the conventional device in that it is composed of the circulating rail 20, the suspension device 40, and the gondola 80, and since the circulating rail 20 can be easily disassembled, they are extremely compact. Therefore, it is easy to transport to mountainous areas and narrow areas. Also, when using a conventional gondola as it is, there is no unnecessary increase in manufacturing costs.

[0039] Moreover, the gondola device 12 of the second embodiment has two sets of suspension devices 40 and gondolas 80 on one circular rail 20. Since the suspension devices 40 and gondolas 80 have already been explained as above, the same reference numerals are used and the explanation thereof may be omitted.

[0040] In this way, two sets of suspension devices 40 and gondolas 80 can be attached to one circumferential rail 20, so that the efficiency of the painting and repair work of the steel tower 500 can be further improved by having multiple workers work on it. The gondola device 12 of the second embodiment also consists of the circumferential rail 20, the suspension devices 40, 40, and the gondolas 80, 80, and since the circumferential rail 20 can be easily disassembled, they are extremely compact. Therefore, it is easy to transport to mountainous areas and narrow areas. In addition, when a conventional gondola is used as it is, there is no unnecessary increase in manufacturing costs.

[0041] Thus, the gondola device 13 of the third embodiment is also different from the conventional device, and is composed of the circulating rail 20, the second circulating rail 200, the suspension devices 40, 40, and the gondolas 80, 80. The circulating rail 20 and the second circulating rail 200 can be easily disassembled, so they are extremely compact. Therefore, they can be easily transported to mountainous areas or narrow areas. In addition, when a conventional gondola is used as it is, there is no unnecessary increase in manufacturing costs.

[0042] Next, the third gondola device 13 will be described. The third gondola device 13 has a circular circumferential rail 20, a suspension device 40, and a first gondola 80, and further has a circular second circumferential rail 200 having a larger diameter than the circular circumferential rail 20, a suspension device 40, and a second gondola 80. The circular circumferential rail 20 and the circular second circumferential rail 200 are preferably concentric in plan view, but are not limited thereto. Since the suspension device 40 and the gondola 80 have already been described above, the same reference numerals may be used and their description may be omitted. Here, the gondola 80 arranged on the circular circumferential rail 20 is referred to as the first gondola 80, and the gondola 80 arranged on the circular second circumferential rail 200 is referred to as the second gondola 80, but both are the same as the gondola 80 described above.

[0043] The second circulating rail 200 can be arranged outside the circulating rail 20. In other words, the circulating rail 20 and the second circulating rail 200 can be configured to be doubled in plan view. Therefore, a worker (not shown) aboard a gondola 80 arranged on the second circulating rail 200 is preferable when painting the underside of the platform 600, and the efficiency of the painting and repair work of the steel tower 500 can be further improved.

[0044] The second circuit rail 200 has a ring-shaped rail main body 210 and a suspending device 25 that suspends the rail main body 210, and the suspending device 25 is attached so as to be suspended from the platform 600. Specifically, the rail main body 210, which is ring-shaped in plan view, is attached via a plurality of suspending devices 25 to a platform mounting portion 650 of the platform 600, which is cross-shaped in plan view. Note that it is preferable to use a so-called H-beam for the rail main body 210.

[0045] The second gondola 80 is movably attached to the rail body 210 via the suspension device 40, but since the gondola 80 attached via the suspension device 40 has already been explained, the same reference numerals may be used and the explanation thereof may be omitted. In this way, the third gondola device 13 can be arranged on the steel tower 500.

[0046] Next, the fourth gondola device 14 will be described. The fourth gondola device 14 has a circular circumferential rail 20, a suspension device 40, 40, and a first gondola 80, 80, and further has a circular second circumferential rail 200 having a larger diameter than the circular circumferential rail 20, a suspension device 40, 40, and a second gondola 80, 80. The circular circumferential rail 20 and the circular second circumferential rail 200 are preferably concentric in plan view, but are not limited thereto. Since the suspension device 40 and the gondola 80 have already been described above, the same reference numerals may be used and their description may be omitted. Here, the gondola 80 arranged on the circular circumferential rail 20 is referred to as the first gondola 80, and the gondola 80 arranged on the circular second circumferential rail 200 is referred to as the second gondola 80, but both are the same as the gondola 80 described above.

[0047] In this way, the fourth gondola device 14 has two gondolas 80 arranged on the circular circumferential rail 20, and two gondolas 80 arranged on the second circumferential rail 200. Therefore, each of the suspension devices 40 also has two suspension devices 40, for a total of four suspension devices 40. The suspension devices 40 are as described above, and preferably have a pair of a main suspension unit 50 and a secondary suspension unit 60. Also, the same components are given the same reference numerals, and their explanation may be omitted.

[0048] The second circulating rail 200 can be arranged outside the circulating rail 20. In other words, the circulating rail 20 and the second circulating rail 200 can be configured to be doubled in plan view. Therefore, a worker (not shown) aboard a gondola 80 arranged on the second circulating rail 200 is preferable when painting the underside of the platform 600, and the efficiency of the painting and repair work of the steel tower 500 can be further improved.

[0049] The second circuit rail 200 has a ring-shaped rail main body 210 and a suspending device 25 that suspends the rail main body 210, and the suspending device 25 is attached so as to be suspended from the platform 600. Specifically, the rail main body 210, which is ring-shaped in plan view, is attached via a plurality of suspending devices 25 to a platform mounting portion 650 of the platform 600, which is cross-shaped in plan view. Note that it is preferable to use a so-called H-beam for the rail main body 210.

[0050] The second gondola 80 is movably attached to the rail body 210 via the suspension device 40, but since the gondola 80 attached via the suspension device 40 has already been described, the same reference numerals may be used and the description thereof may be omitted. In this manner, the fourth gondola device 14 can be disposed on the steel tower 500.

[0051] Thus, the gondola device 14 of the fourth embodiment is different from the conventional device, and is composed of the circulating rail 20, the suspension devices 40, 40 attached to the circulating rail 20, the gondolas 80, 80 and the second circulating rail 200, the suspension devices 40, 40 attached to the second circulating rail 200, and the gondolas 80, 80. The circulating rail 20 and the second circulating rail 200 can be easily disassembled, so they are extremely compact. Therefore, it is easy to transport to mountainous areas and narrow areas. In addition, when a conventional gondola is used as it is, there is no unnecessary increase in manufacturing costs.

[0052] Here, a case where a paint repair work is carried out using the gondola device 10 of the first embodiment will be described. As shown in FIG. 1, after the gondola device 10 of the first embodiment is attached to the steel tower 500, a worker (not shown) boards the gondola 80 and performs a so-called cleaning work process in which rust, dirt, and old paint films adhering to the paint part of the steel tower 500 to be painted are removed, and the painted part is prepared and subjected to a base treatment. After that, an inspector (not shown) boards the gondola 80 and inspects the cleaning work process. If the inspection is not passed, the cleaning work process is carried out again. If it is passed, the process moves to the next base coating process.

[0053] Next, a worker (not shown) boards the gondola 80 and performs the undercoating process, which applies an undercoat to the steel tower 500. After that, an inspector (not shown) boards the gondola 80 and inspects the undercoating process. If the inspection does not pass, the undercoating process is performed again. If the inspection passes, the next process of overcoating is performed.

[0054] Next, a worker (not shown) boards the gondola 80 and performs the topcoat process, which applies a topcoat to the steel tower 500. After that, an inspector (not shown) boards the gondola 80 and inspects the topcoat process. If the inspection is not passed, the topcoat process is performed again. When the inspection is passed, the painting renovation work is completed.

[0055] In this way, since there is no need to perform so-called re-laying work in each of the above-mentioned processes and inspections, the painting repair work can be carried out efficiently. Note that in the conventional device, the re-laying work is not only performed once in each process, but may be performed six or more times, for example, so that a total of 36 re-laying works can be reduced. Note that the re-laying work can also be reduced in the gondola device 12 of the second embodiment, the gondola device 13 of the third embodiment, and the gondola device 14 of the fourth embodiment in the same way.

[0056] Next, when painting repair work is performed using the gondola device 12 of the second embodiment, since there are two gondolas 80, the efficiency of the painting repair work is further improved. Also, with the gondola device 13 of the third embodiment, painting repair work of the platform 600 can be performed not only from the gondola 80 suspended from the circulating rail 20, but also from the gondola 80 suspended from the second circulating rail 200. Furthermore, with the gondola device 14 of the fourth embodiment, since there are two gondolas 80 on each of the circulating rail 20 and the second circulating rail 200, the efficiency of the painting repair work is further improved.

[0057] In this way, the gondolas 80 in the gondola device 10 of the first embodiment, the gondola device 12 of the second embodiment, the gondola device 13 of the third embodiment, and the gondola device 14 of the fourth embodiment can move not only vertically but also horizontally, so that the reach of the workers is not restricted. Furthermore, by reducing the need for workers to work in awkward positions, such as stretching their arms out as far as possible, construction quality, inspection quality, workability, and safety can be improved.

[0058] Next, a method of assembling the gondola device 13 of the third embodiment will be described. The equipment and materials consisting of the circulating rail 20, the second circulating rail 200, the two gondolas 80, the eight suspending devices 25, the two suspending devices 40, the hanger winch 100 (see FIG. 10), the water draining hardware 101, and the hanger winch wire 102 for suspending the hanger winch are carried to the site. The water draining hardware 101 is for suspending the hanger winch wire 102.

[0059] Next, the circulating rail 20 and the second circulating rail 200, which have been disassembled in advance, are assembled on the ground.

[0060] Next, the eight suspending devices 25 and the not-shown circulating rail 20 and second circulating rail 200 are attached to the platform 600. A water draining hardware 101 is attached to the platform 600, a hanger winch wire 102 is attached to the water draining hardware 101, a hanger winch 100 is hung, and the hanger winch 100 is used to lift the eight suspending devices 25 and the not-shown circulating rail 20 and second circulating rail 200. However, the circulating rail 20 and second circulating rail 200 can also be disassembled in advance and then lifted. In that case, the disassembled circulating rail 20 and second circulating rail 200 are then assembled (not shown).

[0061] Next, the circulating rail 20 and the second circulating rail 200 assembled on the platform 600 are lifted up using the hanger winch 100 .

[0062] Thereafter, eight hanging tools 25 are attached to platform 600, and circumferential rail 20 and second circumferential rail 200 are attached to the eight hanging tools 25. In this embodiment, eight hanging tools 25 are attached to platform 600, but the number varies depending on the scale of steel tower 500, and is not limited to this number.

[0063] Next, the suspension devices 40 are attached to the circular rail 20 and the second circular rail 200, respectively.

[0064] Rope 56 is attached to the main suspension part 50 of the suspension device 40, and rope 66 is attached to the secondary suspension part 60, and these ropes 56 and 66 are attached to the gondola 80 placed on the ground. In this manner, the gondola device 13 of the third embodiment can be assembled. When the painting renovation work is completed, the gondola device 13 of the third embodiment can be removed from the steel tower 500 by going through the above-mentioned steps in reverse.

[0065] Thus, the gondola device 13 of the third embodiment is different from the conventional device in that the circulating rail 20 and the second circulating rail 200 can be easily disassembled and are extremely compact. The same is true for the suspension device 40 and the gondola 80. Therefore, it is easy to transport to mountainous areas and narrow areas.

[0066] In addition, most of the installation process is completed by attaching the circulating rail 20 and the second circulating rail 200 to the platform 600, so no large-scale installation work is required. Furthermore, since conventional gondolas can be used as they are, there is no need to unnecessarily increase manufacturing costs. The gondola device 10 of the first embodiment, the gondola device 12 of the second embodiment, and the gondola device 14 of the fourth embodiment are also similarly similar to the above-mentioned method, so they can be easily transported to mountainous areas and narrow areas.

[0067] Moreover, the diameter of the circulating rail 20 in any of the gondola device 10 of the first embodiment, the gondola device 12 of the second embodiment, the gondola device 13 of the third embodiment, and the gondola device 14 of the fourth embodiment can be easily changed. Therefore, it can be applied to various steel towers 500 having different diameters. Also, as described above, the respective connecting parts of the circulating rail 20 and the second circulating rail 200 can be assembled by fastening bolts (not shown).

[0068] The same is true for the gondola device 13 of the third embodiment and the gondola device 14 of the fourth embodiment. In this respect, such a change is difficult in the conventional gondola body formed in a circular doughnut shape. In addition, since the gondola 80 can use an existing gondola as it is, it is not necessary to manufacture a special gondola, and the cost for manufacturing the gondola device 10 of the first embodiment, the gondola device 12 of the second embodiment, and the gondola device 13 of the third embodiment can be reduced compared to the conventional case. [Explanation of symbols]

[0069] 10 Gondola device of the first embodiment 12 Gondola device of the second embodiment 13 Gondola device of the third embodiment 14 Gondola device of the fourth embodiment 20 Circulating Rail 21 Rail body 25 Hanging Device 40 Suspension device 50 Main suspension section 60 Secondary suspension part 70 Connection part 80 Gondola, 1st Gondola, 2nd Gondola 90 Power cord winder 200 2nd lap rail 500 Steel Tower 550 Tower body 600 Platform

Claims

1. For mounting on a tower having a platform and a tower body, A circumferential rail attached to the platform and arranged to surround the steel tower body; A suspension device that is movably disposed along the circulating rail; A gondola device having a gondola arranged to be suspended from the suspension device.

2. For mounting on a tower having a platform and a tower body, A circumferential rail attached to the platform and arranged to surround the steel tower body; A plurality of suspension devices movably disposed along the circulating rail; A gondola device having a gondola arranged so as to be suspended from each of the plurality of suspension devices.

3. For mounting on a tower having a platform and a tower body, A circumferential rail attached to the platform and arranged to surround the steel tower body; A suspension device that is movably disposed along the circulating rail; A first gondola is arranged to be suspended from the suspension device; A second circumferential rail attached to the platform and arranged to surround the tower body; A suspension device movably attached to the second rotating rail; A gondola apparatus having a second gondola arranged to be suspended from the second suspension device.

4. For mounting on a tower having a platform and a tower body, A circumferential rail attached to the platform and arranged to surround the steel tower body; A suspension device that is movably attached along the circumferential rail; A gondola is arranged to be suspended from the suspension device, The suspension device has a main suspension part and a secondary suspension part, The main suspension unit and the secondary suspension unit form a gondola device that suspends the gondola.

5. For mounting on a tower having a platform and a tower body, A circumferential rail attached to the platform and arranged to surround the steel tower body; A plurality of suspension devices movably disposed along the circulating rail; and a gondola arranged so as to be suspended from each of the plurality of suspension devices, The plurality of suspension devices include a plurality of primary suspension units and a plurality of secondary suspension units, A gondola device in which the plurality of main suspension units and the plurality of secondary suspension units suspend the plurality of gondolas, respectively.

6. For mounting on a tower having a platform and a tower body, A circumferential rail attached to the platform and arranged to surround the steel tower body; A suspension device that is movably disposed along the circulating rail; A first gondola is arranged so as to be suspended from a suspension device arranged so as to be movable along the circulating rail; A second circumferential rail attached to the platform and arranged to surround the tower body; A suspension device movably disposed on the second circular rail; A second gondola is arranged to be suspended from a suspension device arranged to be movable along the second circular rail, A suspension device that is movably disposed along the circulating rail; The suspension devices movably disposed along the second circular rail each have a primary suspension portion and a secondary suspension portion, A main suspension unit and a sub suspension unit that are movably arranged along the circulating rail suspend the first gondola, A gondola device in which a main suspension unit and a secondary suspension unit are arranged movably along the second circular rail and suspend the second gondola.

7. 6. The gondola apparatus according to claim 1, further comprising a power cord winding device for winding up a power cord for supplying electricity to the suspension device.

8. The gondola apparatus according to claim 3 or 6, wherein the first gondola and the second gondola further include a power cord winding device for winding up a power cord for supplying electricity to the suspension apparatus.

9. The suspension device has a coupling portion, The gondola device described in claim 3 or 6, wherein the connecting portion connects the main hanging portion and the secondary hanging portion, and the first gondola and the second gondola further have a power cord winding device that winds up a power cord for supplying power to the hanging device.

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