JP2016079761A - Installation method and removal method for connection-type pole structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation method and a removal method for a connection-type pole structure for facilitating installation in a narrow site.SOLUTION: A pole having a plurality of nodes is connected using two functions of an auxiliary connecting tool, namely a shifting function in a vertical direction and a rotating function on a horizontal surface. For this reason, the auxiliary connection tool is divided into an upper auxiliary connection tool 30a and a lower auxiliary connection tool 30b. A third node 12c is connected to the upper auxiliary connection tool 30a, and the lower auxiliary connection tool 30b is lifted such that the third node 12c comes above a second node 12b. Then, the upper auxiliary connection tool 30a is rotated and the third node 12c is positioned directly above the second node 12b, for connecting two poles. The series of steps are repeated for installing a connection-type pole structure. When removing the connected pole structure, the pole is removed one by one starting from a topmost one, by carrying out the steps for installation in a reversed order.SELECTED DRAWING: Figure 4

Description

The present invention relates to a method for installing and removing a connected pole structure in which a plurality of poles are connected.

In the case of building a long columnar body with a total length of several tens of meters, there is a conventionally known method in which a plurality of masts are connected on the ground to form a single continuous columnar body and then raised using a hoist. Even now, building pillar construction by this method is being carried out at many sites. However, this method requires a large and flat site where long columnar bodies can be placed upside down, and also requires a sufficient working radius for safe operation of the hoist. It is not suitable for construction in large urban areas and mountain areas that require logging.

Several techniques have been proposed so far for enabling construction on a narrow site, and typical ones include those disclosed in Patent Documents 1 and 2. Patent Document 1 discloses a construction method in which masts are added one by one from the top to the bottom. On the other hand, Patent Document 2 discloses a method of stacking one section at a time from the bottom to the top.

JP-A-7-301026 JP-A-8-296346

In the construction method of adding a mast to the bottom as disclosed in Patent Document 1, when a new mast is added, a plurality of masts connected so far must be lifted and floated in the air. A lifting device with a simple structure and a pedestal for supporting them are required. Therefore, there is a problem that the work load at the preparatory work stage before the start of the main work is large and the construction cost increases.

On the other hand, in the construction method in which masts are stacked on top of each other, the load burden applied when the mast is raised and lowered is a part of the mast, so that the support structure including the lifting device can be simplified. However, in Patent Document 2, since it is a stacking work while simultaneously manipulating two ropes, a rope for lifting the mast and a rope for guiding the position, the work difficulty is high, and time is wasted if not used. Become.

The present invention was created as a problem to be solved to solve the problems in the prior art, and its purpose is to install a connecting pole structure that facilitates construction in a narrow site To provide a method and removal method.

According to a first aspect of the present invention, in the installation method of the connected pole structure composed of a plurality of nodes, a step of connecting the first node and the second node in advance, the first node and the second node A step of mounting the first guide rail, a step of raising the first node and the second node in the vertical direction, and a first part and a second part, and the first part and the second part are relative to each other. Mounting a rotationally displaceable coupling aid movably along the first guide rail, mounting a second guide rail on the third section to be coupled to the second section, Mounting the third section on the first part of the connection aid, raising the connection aid in the vertical direction, relatively rotating and displacing the first part and the second part, Connecting the lower end of the third section to the upper end of the second section, and the second guide The lower end of the rail comprising the step of connecting the upper end of the first guide rail.

According to a second aspect of the present invention, in the first aspect, a step of attaching a third guide rail to the fourth section to be coupled to the third section, and the fourth section on the first portion of the coupling aid. A step of ascending the connection aid in the vertical direction, a step of relatively rotating and displacing the first part and the second part, and a lower end of the fourth section of the third section. The method further includes a step of connecting to the upper end and a step of connecting the lower end of the third guide rail to the upper end of the second guide rail.

According to a third aspect of the present invention, in the second aspect, a step of attaching an uppermost node to the first portion of the connection aid, a step of raising the connection aid in a vertical direction, and the first portion And a step of relatively rotating and displacing the second portion, and a step of connecting a lower end of the uppermost node to an upper end of an existing node.

According to a fourth aspect of the present invention, in the first aspect, the step of attaching a winch to the first node, the step of attaching a pulley to the second node, and the rope of the winch via the pulley It further includes a step of mooring to the second part of the connection aid.

According to a fifth aspect of the present invention, in the fourth aspect, the method further includes a step of moving the pulley mounted on the second section to the third section.

According to a sixth aspect of the present invention, there is provided a method for removing a connecting pole structure installed by the method according to the third aspect, the step of raising the connecting auxiliary tool in the vertical direction, and the uppermost node. Attaching to the first part of the connection aid, the step of relatively rotating and displacing the first part and the second part, and the step of lowering the connection aid in the vertical direction.

According to a seventh aspect of the present invention, in the sixth aspect, the step of attaching a winch to the first node, the step of attaching a pulley to the existing node, and the rope of the winch through the pulley It further includes a step of mooring to the second part of the connection aid.

The present invention employs a method in which poles are connected one by one in the vertical direction from bottom to top. The poles are connected by combining the vertical movement function of the connection aid and the rotation function in the horizontal plane. The connection aid is divided into two parts, a first part and a second part. A pole to be connected is attached to the upper first part, and the second part is lifted up. When the pole to be connected rises to a height exceeding the existing pole, the first portion is rotationally displaced, the pole to be connected is positioned directly above the existing pole, and both poles are connected. By repeating this series of operations, the connected pole structure can be installed. When the pole structures connected by the above method are removed, the pole structures are removed one by one in order from the top in the reverse order of installation.

According to the present invention, since the poles are connected by using the vertical movement function and the rotation function of the connection auxiliary tool, the connection work is possible even in a narrow site where there is no room for heavy equipment and the like. is there. Moreover, even if it is not a skilled engineer, a connection work and removal work can be performed easily.

Overall view of the wind observation mast Schematic diagram showing the basic structure of a wind observation mast Schematic showing the structure of the coupling aid Schematic showing how to install a wind observation mast Schematic showing how to install a wind observation mast Schematic showing how to install a wind observation mast Schematic showing how to install a wind observation mast

Embodiments of the present invention will be described with reference to the accompanying drawings. A wind condition observation mast 10 shown in FIG. 1 is a structure for observing and recording a wind condition at an installation location. The wind observation mast 10 is a structure having a total height of about 40 m composed of 14-node poles 12 connected in the vertical direction, and is supported by four branch lines 11 from four directions. Wind direction and anemometers are installed at 30m and 40m above the ground respectively, and a lightning rod is installed at the top. An anchor 13 for mooring the base plate 16 and the branch line 11 in consideration of ground strength is installed on the ground surface.

A method for installing the wind condition observation mast will be described with reference to the schematic diagrams shown in FIGS. FIG. 2 shows a state in which two poles 12a and 12b are connected in the vertical direction. The pole constituting the lowest node of the wind observation mast 10 is the first node 12a, and the pole connected right above the first node is the second node 12b. The poles of the first to thirteenth sections are mainly round steel pipes with a total length of 3 m. The top section of the 14th section pole of the wind observation mast is about half the length of the other sections. It is a lightning rod. The twelve poles of the second node mast to the thirteenth node are all the same type, and the upper and lower ends of each node are flange portions 14 used when connecting to other nodes. The lowermost end of the first joint 12a is connected to a mast metal receiver 18 pivotally supported on the base plate 16. The uppermost end of the first node 12a is a flange portion 14 like the other nodes.

The 13 poles of the 1st node mast to the 13th node are configured by adding a lifting scaffold, FM Skylock (registered trademark), and a guide rail 20 to a hollow round steel pipe. FM Sky Rock (registered trademark) is a safety facility for preventing a worker who climbs and descends the wind observation mast 10 from using a lifting scaffold. The guide rail 20 is arranged in parallel with the pole, and the total length of the guide rail 20 other than the first node 12a is equal to the total length of each node. The total length of the guide rail 20a of the first node 12a is shorter at the lower end side than the total length of the pole, and a gap of about several tens of centimeters is formed between the guide rail 20a and the base plate 16.

A method for installing the wind condition observation mast will be described with reference to the schematic diagrams shown in FIGS. The wind observation mast 10 is a connected pole structure composed of 14 poles. The first joint 12a located at the lowermost part and the second joint 12b located above the first joint 12a are connected in a state of being laid down and then erected on the base plate 16. The lower end portion of the first node 12a is connected to the mast receiver 18 in advance. A winch base 22 is attached to a position closer to the base plate 16 than the center of the first section 12a, and a hand-wound winch 24 is installed. A pulley support fitting 26 is attached at a position slightly above the center of the second joint 12b. The pulley support fitting 26 is provided with two pulleys, on which the rope 28 of the hand-winding winch 24 is suspended.

The coupling aid 30 is used for installing the poles of the third to the fourteenth sections. As shown in FIG. 3, the connection assisting tool 30 is composed of two parts, an upper connection assisting tool 30 a and a lower connection assisting tool 30 b, and both parts are connected by a turntable 32. A mandrel is built in the upper and lower boundary portions of the upper and lower connection assisting tool 30 in accordance with the center axis, and the upper connection assisting tool 30a and the lower connection assisting tool 30b are relatively rotatable around the center axis. The upper coupling assisting tool 30a is provided with sliders 34 on the side surfaces facing each other across the central axis. One slider 34 is provided at each of the center of the upper connection auxiliary tool and the vicinity of both upper and lower ends, and a fixing pin is provided on the lowermost slider 34. The lower coupling assisting tool 30b is provided with a slider 34 only on one side surface. Each of these sliders 34 is provided at the center of the lower connection assisting tool 30b and in the vicinity of both upper and lower ends as in the case of the upper connection assisting tool 30a. Furthermore, a hanging bracket 36 is attached to the lower connection auxiliary tool 30b at a position slightly below the center. The coupling aid 30 can be moved up and down along the pole by mounting the slider 34 on the guide rail 20.

Hereinafter, a method of connecting the third node 12c onto the second node 12b will be described. First, the connection assisting tool 30 is divided into upper and lower parts, and only the upper connection assisting tool 30a is mounted on the guide rail 20a of the first joint 12a. The guide rail 20c of the third joint 12c is attached to the slider 34 on the side surface opposite to the slider 34 attached to the guide rail 20a. At this time, the guide rail 20c and the slider 34 are temporarily fixed by the fixing pins 38. As a result, the third joint 12c is temporarily fixed to the upper connection assisting tool 30a, and can move up and down following the movement of the upper connection assisting tool 30a. When the mounting of the upper connection assisting tool 30a is completed, it is raised along the guide rails 20a and 20b, and the lower connection assisting tool 30b is connected directly below the upper connection assisting tool 30a. At the time of connection, a mandrel is inserted into the upper and lower boundary portions, and temporarily fixed using an anti-rotation pin so that the upper connection assisting tool 30a and the lower connection assisting tool 30b are not rotationally displaced.

A hand-wound winch 24 is used to raise the third node 12c. First, the shackle 40 attached to the tip of the rope 28 is attached to the hanging bracket 36 of the lower connection assisting tool 30b. When the manual winding winch 24 is operated and the connection assisting tool 30 is pulled up, the third joint 12c is raised accordingly. As shown in FIG. 4, the third node 12c is raised to such a height that a gap of about several centimeters is formed between the lower end of the third node 12c and the upper end of the second node 12b.

Next, the rotation prevention pin temporarily fixed to the upper connection assisting tool 30a and the lower connection assisting tool 30b is removed, and the upper connection assisting tool 30a is rotated by 180 degrees around the central axis as shown in FIGS. Invert the third clause 12c. As a result, the third node 12c is positioned immediately above the second node 12b. In this state, as shown in FIG. 6, the hand wound winch 24 is slightly loosened to lower the third joint 12c, and the flanges 14 of the third joint 12c and the second joint 12b are joined. Thereafter, the flanges 14 are fixed with bolts while finely adjusting the alignment so that the guide rail 20c of the third joint 12c and the guide rail 20b of the second joint 12b are continuous. When the fixing of the second joint 12b and the third joint 12c is completed, the fixing pin that fixes the guide rail 20c and the slider 34 is removed, and the temporary fixing of the coupling aid 30 and the third joint 12c is released. Thereby, the connection auxiliary tool 30 can be moved away from the third joint 12c.

The connection in the fourth section can also be performed by the same method as described above. That is, in order to connect the third joint 12c, the connection assisting tool 30 moving to the uppermost part is lowered to the lowermost part, the fourth joint is mounted on the upper connection assisting tool 30a, and temporarily fixed by the fixing pin. The pulley support bracket 24 attached to the second joint 12b is once removed and moved to the third joint 12c. When the hand-winding winch 24 is operated and the connection aid 30 is pulled up, the fourth section rises along with this and can be connected to the third section. The connection from the fifth section onward is performed in the same way.

The branch lines are attached in advance to the steel pipes of the corresponding nodes, and are appropriately extended according to the connection state of each node and fixed to the ground surface with anchors. After connecting up to the 14th section, the guide rail mounted on the poles of the 1st section to the 13th section is removed. This is to reduce the total weight of the wind observation mast 10 and to reduce the wind resistance as much as possible. Further, the winch mount 22, the hand-wound winch 24, and the pulley support fitting 26 used for connecting the poles are also removed.

Remove guide rails in order starting from Section 13. First, the pulley support fitting 26 is attached to the twelfth node. Next, the connection assisting tool 30 is raised to the top, and the guide rail of the thirteenth section is temporarily fixed to the upper connection assisting tool 30a. Next, the pole of the thirteenth joint and the guide rail are released, and after the guide rail is separated from the pole, the upper connection assisting tool 30a is rotationally displaced by 45 degrees to 90 degrees. The amount of displacement is appropriately set so that the guide rail separated from the 13th joint does not interfere with the guide rail attached to the 12th section when the connection assisting tool 30 is lowered. Next, the connection assisting tool 30 is lowered, and alignment is performed at a height at which the guide rail of the twelfth node is directly beside the upper connection assisting tool 30a. Next, the upper connection assisting tool 30a is rotationally displaced by 45 to 90 degrees, and the guide rail of the twelfth node is temporarily fixed to the portion facing the twelfth node. Next, the fixation of the pole and the guide rail of the twelfth node is released, and the guide rail is separated from the pole. As a result of the above operation, the guide rail separated from the 13th section and the guide rail separated from the 12th section are temporarily fixed to the upper connection assisting tool 30a. When the connection assisting tool 30 is lowered in this state, the two guide rails separated from the poles of the 13th and 12th nodes can be lowered to the ground at the same time. Remove the guide rails from Section 11 onwards in a similar manner.

Finally, we will briefly explain how to remove the wind observation mast. The removal of the wind observation mast 10 can be performed by the reverse procedure of the installation method described above. First, the guide rail 20 is mounted on the first to thirteenth poles, and the winch mount 22, the hand-wound winch 24, and the pulley support fitting 26 are mounted at predetermined positions. The pulley support fitting 26 is attached to the thirteenth section. Next, the connection auxiliary tool 30 is raised to the top, and the 14th node is fixed to the upper connection auxiliary tool 30a. Next, the connection of the 14th section and the 13th section is released, and the upper connection assisting tool 30a is rotationally displaced by about 180 degrees. Thereafter, when the connection aid 30 is lowered, the fourteenth section can be lowered to the ground. Sections 13 and on will be removed in the same way.

The embodiment of the present invention has been described above, but the present invention can also be applied to a connected pole structure other than a wind observation mast. In this case, the material and shape of the pole, the number of connected parts, etc. It can be arbitrarily selected according to the size of the structure and the purpose of use.

DESCRIPTION OF SYMBOLS 10 Wind observation mast 12 Pole 20 Guide rail 24 Manual winding winch 26 Pulley support bracket 30 Connection auxiliary tool 30a Upper connection auxiliary tool 30b Lower connection auxiliary tool 34 Slider 36 Hanging bracket 38 Fixing pin

Claims (7)

In the installation method of the connected pole structure composed of a plurality of nodes,
Connecting the first section and the second section in advance;
Attaching the first guide rail to the first section and the second section;
Erecting the first section and the second section in a vertical direction;
A step of mounting a connection aid that is divided into a first portion and a second portion, and the first portion and the second portion are relatively rotationally displaceable along the first guide rail;
Attaching a second guide rail to the third section to be coupled to the second section;
Attaching the third section to the first part of the connection aid;
Raising the connecting aid in the vertical direction;
Relatively rotating and displacing the first part and the second part;
Connecting the lower end of the third section to the upper end of the second section;
Connecting the lower end of the second guide rail to the upper end of the first guide rail,
Installation method. Attaching a third guide rail to the fourth section to be connected to the third section;
Attaching the fourth section to the first part of the connection aid;
Raising the connecting aid in the vertical direction;
Relatively rotating and displacing the first part and the second part;
Connecting the lower end of the fourth section to the upper end of the third section;
Connecting the lower end of the third guide rail to the upper end of the second guide rail,
The installation method according to claim 1. Attaching the uppermost node to the first part of the connection aid;
Raising the connecting aid in the vertical direction;
Relatively rotating and displacing the first part and the second part;
A step of connecting a lower end of the uppermost node to an upper end of an existing node,
The installation method according to claim 2. Attaching a winch to the first section;
Attaching a pulley to the second section;
Mooring the rope of the winch to the second part of the coupling aid via the pulley;
The installation method according to claim 1. Further including the step of moving the pulley mounted on the second section to the third section,
The installation method according to claim 4. In the removal method of the connection type pole structure installed by the method according to claim 3,
Raising the connecting aid in the vertical direction;
Attaching the uppermost node to the first part of the connection aid;
Relatively rotating and displacing the first part and the second part;
Including the step of lowering the connection aid in the vertical direction,
Removal method. Attaching a winch to the first section;
Attaching a pulley to the existing node;
Mooring the rope of the winch to the second part of the coupling aid via the pulley;
The removal method according to claim 6.

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