JP3488185B2 - Circular gondola equipment for column tower construction - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for painting, inspecting, and repairing various cylindrical steel towers such as power transmission towers, radio towers, and water towers having a cylindrical shape. The present invention relates to a circular gondola device for column tower construction. 2. Description of the Related Art In conventional column tower construction, a tower-like scaffold is constructed up to an intermediate stage of a column tower to perform painting, inspection, repair work, etc. of various towers. As a gondola device used in the conventional construction, for example, four box-type deck type gondola devices are prepared, and each gondola device is erected on a steel tower via two suspension wires, and each gondola device is provided. In some cases, a gondola device is moved up and down along a steel tower by winding a suspension wire by a winding winder device fixedly mounted on the device. [0004] However, in the conventional method of constructing a tower-like scaffold, in the case of a cylindrical tower, for example, a power transmission tower, the tower itself is often built on a narrow site. Therefore, it is very difficult to construct a scaffold on a narrow site. Also, on narrow roads, it is very difficult to transport the scaffolding material. In addition, the construction and dismantling of the scaffold required a considerable number of days, and construction costs were likely to be high. In addition, since there are many locations where the scaffold members are combined, the assembly is very complicated and troublesome, and the number of locations where safety inspection is required is inevitably increased. On the other hand, when four box deck type gondola devices are prepared and installed and used, since the hoisting winder devices are fixed to each gondola device itself, the hanging points coincide with the hoisting winder devices. The disadvantage is that only a column-sized steel tower can be installed. In addition, since a total of eight suspension wires are used, a large force of about 1232 kg acts on the column tower. Further, since four gondola devices are used, each gondola device requires an operator for operation, and it is necessary to secure at least four operators. In addition, there are many unloading members in the upper part of the columnar tower, and there is a problem that considerable time is required for erection and disassembly of the gondola device. Accordingly, the present invention has been made in view of the above-described problems that have been encountered in the past, and is easy to transport on narrow roads and assemble and disassemble on narrow premises, and to reduce the number of hanging wire members of a gondola. The present invention also provides a circular gondola device that can minimize the load on the column tower itself and use a tiltable winding winder device to easily install a gondola on a column tower of any diameter. Also,
A single gondola operator is sufficient, the cost is lower than the conventional method of constructing a scaffold, the number of assembly members is reduced, the number of places requiring safety inspections can be reduced, and the conventional scaffold can be constructed. It is an object of the present invention to provide a circular gondola device for column tower construction, which is extremely easy to install and dismantle as compared with the construction method, and requires fewer working days. Therefore, in the present invention, painting, inspection, and repair work of various cylindrical steel towers such as a transmission tower, a wireless tower such as a cellular phone, a water tower, and the like having a cylindrical shape. like a circular gondola apparatus for cylindrical tower construction for performing, rubber
The main body of the cylinder is C-shaped so that it can be placed around a cylindrical tower.
Circular donut shape, the circumference can be disassembled into three arc-shaped parts
Noh, in the gondola body, in the radial direction of the gondola body
Install a tiltable winding winder device,
Winding of the suspension wire connected to the hoisting winder
To move the gondola body up and down
The wire is on the cylindrical surface on the intermediate stage of the cylindrical tower.
A total of three around the intermediate stage at 120 degree intervals
It is hung in contact with the edge of the edge
On the outer fence of the gondola body corresponding to
At an angle of 120 degrees, tilt at the end
Connected to a total of three winding winders
The connection has solved the problem described above. In the circular gondola apparatus for column tower construction according to the present invention, the gondola body can be installed on a column tower of any diameter with a single gondola body by a winding winder apparatus which can be tilted in the radial direction. Makes use possible. The gondola body, which can be disassembled into three arc-shaped portions, makes it easier to transport members on narrow roads or assemble and disassemble members on narrow premises. Further, the three suspension wires connected to each of the three winding winders installed on the gondola main body reduce the load applied to the column tower P. The gondola body formed in the shape of a C-shaped circular donut is capable of ascending and descending while avoiding an elevating ramp in a cylindrical steel tower. An embodiment of the present invention will be described below with reference to the drawings. The circular gondola device according to the present invention is a power transmission tower having a cylindrical shape, a wireless tower such as a mobile phone,
It performs painting, inspection, repair work, etc. on various cylindrical steel towers P such as water towers. Specifically, the working gondola main body 1 is formed in a C-shaped circular donut shape, a winding winder device 3 is installed on the gondola main body 1, and the winding wire 2 connected to the winding winder device 3 is wound. The gondola body 1 is moved up and down. The hoisting winder device 3 can be tilted in the radial direction, and can correspond to any diameter size of the columnar tower P. First, as shown in FIG. 5, the gondola main body 1 is provided with a plurality of substantially horizontal U-shaped frame-shaped arm portions 4 on a cylindrical peripheral surface of an intermediate stage (iron tower intermediate landing) Q in a cylindrical iron tower P. Provide. Then, a base wire 5 having a rubber hose is wound around the arm portion 4 in an annular shape, and a shackle (U) connected to one end of the annular shape of the base wire 5 is formed.
The hanging wire 2 of the gondola main body 1 is connected to a connection metal fitting 6 formed in a chain ring shape by fixing the opening side of the metal-shaped metal fitting with a pin. The location where the hanging wire 2 abuts on the corner contact portion L of the intermediate stage Q is cured with a corner contact fitting (not shown) and a rubber hose or the like. In this way, a total of three suspending wires 2 are suspended around the intermediate stage Q at an angle of 120 degrees, and the lower end of the suspending wire 2 is a winding winder attached to the fence of the gondola body 1. It is linked to the device 3 (see FIG. 1). As shown in FIGS. 1 and 2, the gondola body 1 has a work floor formed in a C-shaped circular donut shape when viewed from the upper side. It can move up and down while avoiding the lifting ramp S. The gondola body 1 has its own circumference of 3
It can be disassembled into two arc-shaped parts, so that members can be easily transported on narrow roads and assembled and disassembled in narrow premises. As shown in FIG. 2, on the outer fence side of the gondola body 1, a net frame 7 is arranged in a cylindrical frame shape, and a curing net 8 for preventing a worker from falling is stretched on the net frame 7. Has been established. As shown in FIG. 1, a total of three guide rollers are provided on the inner peripheral side of the work floor of the gondola main body 1 at a circumferential angular interval of 120 degrees corresponding to the corner contact portions L of the intermediate stage Q. By installing the guide roller 9 and abutting the guide roller 9 so as to roll on the peripheral wall surface of the column tower P, unnecessary swing of the gondola body 1 moving up and down the column tower P is reliably prevented. Further, as shown in FIGS. 3 (a) to 3 (c) and FIG. 4, the upper end of the outer side fence of the working gondola body 1 is set at 120 degrees corresponding to the corner contact portion L of the intermediate stage Q. A total of three support bases 10 are installed at circumferential angular intervals of, and a substantially U-shaped holding frame part 1 is provided on the support base 10 so that the support base 10 can be tilted inward via a rotating shaft 11.
The lower end of the holding frame 12 is pivotally connected to support the winding winder device 3 on the U-shaped opening side of the holding frame 12 (see FIG. 3C). As described above, since the winding winder device 3 can be tilted in the radial direction, the cylindrical tower P having any diameter can be used.
The gondola main body 1 can be installed also in the above. The winding winder device 3 includes a motor, a speed reducer, a winding drum,
A well-known lifting winch including a brake and a clutch is used. A guide hole 13 is provided at an upper end of the holding frame portion 12, and is wound around a winding drum (not shown) of the winding winder device 3 in a state where the lower end of the hanging wire 2 passes through the guide hole 13. An upper limit switch 14 is provided on the upper surface of the holding frame 12 to stop the gondola body 1 from rising when the gondola body 1 moves up the column tower P and approaches the intermediate stage Q. are doing. Next, the load relationship of the gondola body 1 on the corner contact portion L of the intermediate stage Q will be described with reference to FIG. First, assuming that the height between the base wire 5 and the intermediate stage Q is H = 1600 mm, the included angle of the hanging wire 2 about the corner contact L is θ = 147 degrees. Then, the load applied to one of the suspension wires 2 of the gondola body 1 is WG = {500 kg of its own weight + 350 kg of the loading load +
Assuming that the lifting inertia force is 140 kg３３０ / 3 = 330 kg and the weight of the curing net and others is WN = 20 kg per one of the hanging wires 2, the resultant force acting on the beam of the intermediate stage Q by the hanging wires 2 is P = 2 × (WG + WN) × COS (θ / 2)
= 2 × (330 + 20) × COS (147/2) = 19
9kg, horizontal component of resultant force is Ph = P × SIN (θ / 2)
= 199 × SIN (147/2) = 191 kg, and the vertical component of the resultant force is Pv = P × COS (θ / 2) = 199 × CO
S (147/2) = 57 kg. As described above, according to the present invention, the load of the gondola main body 1 applied to the column tower P can be reduced to about half or less of the conventional case, and the load on the column tower P can be reduced. It should be noted that the present invention is not limited to the above-described embodiment, and all modifications and changes as long as the object of the present invention can be achieved are included in the present invention. The present invention is configured as described above.
It is extremely easy to transport members on narrow roads and assemble and disassemble members on narrow premises. Also,
By reducing the number of suspending wires 2 of the gondola body 1, the load on the cylindrical tower P itself can be reduced as much as possible. Further, by installing the tiltable winding winder device 3, the gondola main body 1 can be easily installed even in the case of the cylindrical steel tower P having any diameter. Moreover, only one operator is required to operate the gondola body 1. Further, the installation cost is lower than that of the conventional method of constructing a scaffold, and the number of parts to be assembled can be reduced to reduce the number of places requiring a safety inspection. In addition, the present invention provides a circular gondola device for column tower construction, which can be easily erected and dismantled compared to a conventional method of constructing a scaffold, and can reduce the number of working days. That is, in the present invention, a state in which a total of three suspending wires 2 are in contact with the angular contact portions L on the peripheral edge of the intermediate stage Q at an angular interval of 120 degrees from the cylindrical peripheral surface on the intermediate stage Q of the cylindrical tower P. And a total of three winding winders 3 arranged at 120 ° angular intervals so as to be tiltable at the upper end of the outer fence of the gondola body 1 corresponding to the corner contact portion L of the intermediate stage Q. Since each is connected, the gondola body 1 can be smoothly moved up and down. Moreover, a total of three winding winder devices 3
The three suspension wires 2 connected to the
The load applied to the columnar tower P can be reduced as much as possible. For example, the load of the gondola main body 1 applied to the column tower P can be reduced to about half or less of the related art, and the load on the column tower P can be reduced. In addition, the gondola main body 1 can be installed at any diameter size of the column tower P. Furthermore, since the gondola main body 1 can be disassembled into three arc-shaped portions, it is extremely easy to transport the gondola main body 1 on a narrow road or to assemble and disassemble members in a narrow site. In addition, since the gondola body 1 is formed in a C-shaped circular donut shape, the gondola body 1 can be moved up and down while avoiding the elevating ramp S of the columnar tower P. Next, in the corner contact portion L of the intermediate stage Q
The load relationship of the gondola body 1 will be described with reference to FIG.
I will tell. First, the wire 5 with base and the intermediate stage Q
Assuming that the height is H = 1600 mm, the suspension wire 2
Is 147 degrees.
Then, one of the hanging wires 2 of the gondola body 1
WG = 500 kg of own weight + 350 k of load
g + lifting inertia force 140 kg｝ / 3 = 330 kg, curing
WN = 20k per one wire of the hanging wire 2
g, the beam of the intermediate stage Q by the suspension wire 2
Is P = 2 × (WG + WN) × COS (θ /
2) = 2 × (330 + 20) × COS (147/2) =
199 kg, the horizontal component of the resultant force is Ph = P × SIN (θ /
2) = 199 × SIN (147/2) = 191kg,
The vertical component of the force is Pv = P × COS (θ / 2) = 199 ×
COS (147/2) = 57 kg. in this way,
According to the present invention, the gondola body 1
It is possible to reduce the load to about half or less of the conventional
The burden on the tower P can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a gondola main body showing an embodiment of the present invention. FIG. 2 is a side view of the gondola body. FIG. 3 shows the periphery of a winding winder device;
(A) is a side view in a state where the winding winder device is upright, (b) is a front view in a state where the winding winder device is upright, and (c) is a side view in a state where the winding winder device is tilted. FIG. 4 is a longitudinal sectional view of the gondola main body in a state where the winding winder device is tilted, showing a use state of the present invention. FIG. 5 is a side view illustrating a load relationship of a gondola main body applied to a corner contact portion of an intermediate stage according to the present invention. [Description of Signs] P ... Cylindrical tower Q ... Intermediate stage L ... Square abutment S ... Elevating ramp 1 ... Gondola body 2 ... Suspension wire 3 ... Winding winder device 4 ... Arm unit 5 ... Base wire 6 ... Shackle 7 ... Net frame 8 Curing net 9 Guide roller 10 Support base 11 Rotary shaft 12 Holding frame 13 Guide hole 14 Upper limit switch

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Kawada 4-10-2, Oyumino, Midori-ku, Chiba-shi, Chiba D-105 Corp. Shirazuri Kazuhiro Takaishi 2-9-1-5, Fujimi, Chuo-ku, Chiba-shi, Chiba No. Tokyo Electric Power Company Chiba Branch (72) Inventor Michio Kubota 2-15-4 Kiyomidai Higashi, Kisarazu-shi, Chiba Co., Ltd. Kubota Paint Co., Ltd. (56) References JP-A-8-246659 (JP, A) JP-A-11-270125 (JP, A) JP-A-52-52438 (JP, A) JP-A-63-130869 (JP, A) JP-A-1-1577841 (JP, U) JP-A-56-52555 (JP, A) , U) JP 8-30076 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 1/36 E04G 3/00 E04G 3/10 E04G 3/14

Claims (1)

(57) [Claims] [Claim 1] For the construction of column towers that perform painting, inspection, repair work, etc. of various transmission towers such as transmission towers, mobile phones, etc. A circular gondola device, in which the gondola body is arranged around a cylindrical tower.
C-shaped circular donut shape, the circumference of which is three arc-shaped parts
It is formed so that it can be disassembled, and the gondola body
Equipped with a winding winder that can be tilted in the radial direction
And a hanging wire connected to the winder device.
The gondola body up and down
The hanging wire is on the middle stage of the cylindrical tower
A total of three are at an interval of 120 degrees from the cylinder circumference
It is suspended in contact with the square
The outer peripheral side of the gondola body corresponding to the square contact part of the intermediate stage
120 degree angle to allow tilting at the top of the fence
To a total of three winding winders arranged at intervals
A circular gondola device for column tower construction, which is linked to each other .