JP2004003160A - Base rod device for dismantling steel tower, and method of dismantling steel tower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base rod device for efficiently dismantling a transmission steel tower, that is easily and removably attachable to the tower while requiring little space to install. <P>SOLUTION: The base rod device 1 is mounted to a main pole T1 to dismantle a transmission steel tower T. The base rod device 1 has a boom 3 connected to a mounting bracket 2 used for the main pole T1, with the boom 3 fixed in place using a guide fitting 4. Using the boom 3, used materials such as the main poles T1 are hung down with a hanging wire 5. The guide fitting 4, with a bolt 17, tightens together a counter-base 16 that grips the boom 3 and a pressing plate 18. A spacer is fitted around the shank of the bolt 17 to widen the spacing between the counter-base 16 and the pressing plate 18 to guide the boom 3 in moving axially. Thus, once the upper main pole T1 is hung down by the base rod device 1, the boom 3, together with the mounting bracket 2, is moved to the adjoining lower main pole T2 therebelow, then the operation of removing the lower main pole T2 is carried out. These operations are repeated for the main poles T1 and T2 on four sides, whereby the transmission steel tower T is dismantled from its top. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rod device for efficiently dismantling a power transmission tower from above and a dismantling method using the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in the dismantling work of a power transmission tower, large equipment such as a crane truck and a crane device is carried in and installed at a position around the power transmission tower, and components of the steel tower are sequentially removed, and then dismantled.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional crane trucks and crane devices, there are cases where it is difficult or inappropriate for a crane truck such as an urban area or a mountain area to enter or to carry a crane. In such a case, a bar device is simply used. In this bar apparatus, a boom is attached to one of four main pillars constituting a power transmission tower, and the boom is suspended by a hanging wire that winds another main pillar with a winch. Adjustment of the position of the boom in the front-rear direction is performed by operating the hoisting operation wire from the tip end thereof via a guide pulley on a steel tower on the ground. Positioning of the boom in the left-right direction is performed by setting turning operation branch lines on both the left and right sides of the boom and operating this from the ground. Then, the bar device moves the steel tower from the upper part to the lower part, and sequentially removes the main pillars.
However, in this rod device, a branch line for turning operation and a wire for undulating operation must be provided on the ground, and a space must be provided on the ground so as not to hinder the operation.
Accordingly, an object of the present invention is to provide a tower dismantling rod device and a dismantling method that can be easily attached to and detached from an existing power transmission tower, does not take up installation space, and can dismantle the power transmission tower efficiently.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, in the first invention, in order to disassemble the power transmission tower T, in the steel tower dismantling bar device 1 which is sequentially removed from the upper parts of the four main pillars T1 and T2 in which the steel tower T is assembled. The mounting bracket 2 is attached to the lower main pillar T2 adjacent below the upper main pillar T1 to be removed, the base end of the mounting bracket 2 is pivotally supported, and upward along the upper main pillar T1. At least, the boom 3 is arranged at a height at which the upper main column member T1 can be suspended, and the middle of the boom 3 is fixed to the lower main column member T2 with the guide fitting 4, and the pulley 20 at the tip of the boom 3 is set. The hanging wire 5 is wound around the upper pillar, and the upper pillar is suspended by a winch. The upper pillar T1 is attached to the lower pillar T2, and the upper pillar T1 is suspended. Move to the lower main pillar adjacent to the lower Lower perform work, by repeating this, and so successively dismantling the transmission tower T from the top.
In the second invention, the middle of the boom 3 is fixed to the lower main pillar T2 with the guide fitting 4 and the upper main pillar T1 is suspended, and then the boom 3 is movable axially downward with the guide fitting 4. It was configured to be guided.
In the third aspect of the present invention, the guide fitting 4 is provided with a bolt 17 for tightening so as to grip around the boom 3, and the tightening is regulated by interposing a spacer 19 on the shaft, so that the movement of the boom 3 in the axial direction is prevented. Guided.
In the fourth invention, in the method for dismantling the power transmission tower T by sequentially removing the power transmission tower T from the upper parts of the four main pillars T1 constituting the power transmission tower T, the method is adjacent to below the upper main pillar T1 to be removed. The boom 3 is fixed to the lower main pole T2, the hanging wire 5 is hung around the pulley 20 at the tip of the boom 3, the upper main pole T1 is suspended by a winch, and then the lower main pole T2 is removed. To be targeted, the boom 3 is moved and fixed to the lower main pole T2 adjacent to the lower main pole T2, and the operation of hanging down the main pole T2 is repeated, and the power transmission tower T is sequentially dismantled from the top. A tower dismantling method was adopted.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1 and FIG. 2, the power transmission tower T is provided with a rod device 1 on its main pillar T1 to disassemble the tower. The bed device 1 includes a mounting bracket 2 for mounting to the main pillar T1, a boom 3 erected on the mounting bracket 2, a guide bracket 4 for fixing the boom 3 and guiding movement. A hanging wire 5 for hanging used materials such as the main pillar T1 using the boom 3 is provided.
[0006]
As shown in FIG. 3 and FIG. 4, the mounting bracket 2 includes a backing plate 6 which forms a substantially right angle along the inside thereof so as to be mounted on a main pillar T2 which is an angle steel material. On both plate surfaces of the backing plate 6, three lateral bolt insertion slots 6a are provided vertically. A stop plate 8 for sandwiching both edges of the main pillar T1 with the backing plate 6 and fixing it with bolts 7 is connected to the backing plate 6. The stopper plate 8 is formed with a step which coincides with the surface of the main pillar T2 and the surface of the backing plate 6 so as to overlap both side edges of the main pillar T2 and the backing plate 6. A horizontal plate 9 is horizontally fixed inside the backing plate 6. An eye 10 is erected on the horizontal plate 9. A pair of support plates 11 facing each other at a distance in the horizontal direction are fixed to the lower surface of the horizontal plate 9 and the inner surface of the backing plate 6 in the vertical direction.
[0007]
As shown in FIGS. 1 and 2, the boom 3 is made of a steel pipe, and has a clevis 3 a at a lower end for pivotally supporting the eye 10 of the mounting bracket 2. A pulley 20 for hanging the hanging wire 5 is hung on the mounting piece 3b at the tip of the boom 3, and a pulley 21 for guiding the hanging wire 5 is provided on the lower mounting piece 3c. The mounting piece 3b is provided rotatably around the axis with respect to the boom 3 so that the main column members T1 and T2 can be tilted toward the inside of the steel tower, that is, the so-called rolling angle, and the position at which the suspension wire 5 is extended from the pulley 20 can be extended. Can be arranged on the back side of the boom 3 and the workability when the hanging wire 5 is fastened to the material can be considered. One end of the suspension wire 5 holds a material such as the upper main pillar T1 to be removed, and the other end is wound around a winch (not shown) installed on the ground.
[0008]
As shown in FIGS. 5 and 6, the guide fitting 4 is provided with a backing plate 12 that forms a substantially right angle along the inside of the guide fitting 4 in substantially the same manner as the mounting fitting 2, for attachment to the main pillar T <b> 1. The backing plate 12 is provided with two horizontal bolt insertion slots 12a at the top and bottom. The backing plate 12 is provided with a stopper plate 14 that overlaps with this and sandwiches both side edges of the main pillar T2 with the backing plate 12 and connects them with bolts 13. The stopper plate 14 is formed with a step which coincides with the surface of the main pillar T2 and the surface of the backing plate 12 so as to overlap both side edges of the main pillar T2. A receiving plate 16 that is curved in an arc-shaped cross section and that receives the side surface of the boom 3 is vertically fixed to the inside of the backing plate 12 via a pair of horizontal plates 15 that are provided at an interval vertically. A holding plate 18 having an arc-shaped cross section for holding the boom 3 is fixed to the receiving plate 16 with bolts 17. As shown in FIG. 7, a substantially U-shaped spacer 19 is fitted on the shaft of the bolt 17 in order to guide the boom 3 freely in the axial direction by widening the space between the receiving plate 16 and the holding plate 18. Can be combined.
[0009]
In this rod device 1, in order to sequentially remove from the upper one T1 of the upper and lower connected main pillars T1 and T2 constituting the power transmission tower T, a four-sided lower main pillar T2 forming the steel tower T is used. Attach to each. In the base device 1, first, the mounting bracket 2 is attached to the lower main column T2, the boom 3 is supported by the lower main column T2, and the guide metal 4 is mounted to the lower main column T2 to fix the boom 3. The mounting bracket 2 has the backing plate 6 applied to the inside of the lower main pillar T2, and the stopper plate 8 overlapped so as to straddle the backing plate 6 and both side edges of the lower main pillar T2. And tighten it. The clevis 3a of the boom 3 is pin-connected to the eye 10 of the mounting bracket 2. The guide metal fitting 4 applies the backing plate 12 to the inside of the lower main pillar T2, overlaps the stopper plate 14 so as to straddle the backing plate 12 and both edges of the lower main pillar T2, and inserts the bolt 13 into the elongated hole 12a. It is inserted and fastened and fixed to the lower main pillar T2. The guide fitting 4 is gripped by sandwiching the boom 3 between the receiving plate 16 and the holding plate 18 and tightening with the bolt 17.
[0010]
In the suspension work, first, the material such as the upper main pillar T1 or the oblique material attached thereto is tied to the suspension wire 5, then the material is detached from the steel tower T, and guided by the pulley 21 at the bottom, and the winch on the ground is Is operated to suspend the material in the ground space inside the tower T.
When the mounting piece 3b is provided rotatably about the axis of the boom 3, the mounting piece 3b is turned to place the pulley 20 on the back side of the boom 3 inclined by the rolling angle together with the main pillars T1 and T2. If it arrange | positions, since the hanging wire 5 will be paid out from the pulley 20 on the same side as the main pillar T1 with respect to the boom 3, workability | operativity when tying the hanging wire 5 to a material will become favorable. In this case, after the hanging wire 5 is tied to the material, the material is turned and arranged on the ventral side of the boom 3, and then the material is hung down in the same manner as above.
[0011]
When the upper main pillar T1 is suspended by the bar device 1, the bolts 7 of the mounting bracket 2 and the bolts 13 of the guide bracket 4 are loosened to remove the metal fittings 2 and 4, and the lower main pillar T2 is to be removed. For this purpose, the bar device 1 is moved to and attached to the lower main column T2 adjacent to the lower portion, and the operation of removing the upper main column T2 is performed in the same manner. These operations are performed on the four main pillars T1 and T on which the transmission tower T is assembled, and the transmission tower T is sequentially dismantled from the upper part to the lower part.
[0012]
At the time of shifting to the lower main pillar T2 of the rod device 1, the bolt 17 of the guide fitting 4 is loosened to widen the space between the receiving plate 16 and the holding plate 18, and the spacer 19 is attached to the shaft of the bolt 17 between them. And the bolts 17 are tightened again to fix the spacers 19 in advance. Then, the bolt 7 of the mounting bracket 2 is loosened while supporting the boom 3, the mounting bracket 2 is removed from the lower main pillar T2, and the boom 3 is moved to the lower main pillar T2 adjacent to the lower part of the mounting bracket 2. Then, it is fixed with the mounting bracket 2 and another new guide fitting 4 in the same manner as described above. At this time, the boom 3 is guided in the axial direction by the guide fitting 4, so that the boom 3 does not fall down and is less likely to shake laterally, so that the operation is safe and easy. The guide member 4 used to move the boom 3 is removed from the main pillar T2 after the boom 3 is moved. Thus, the two guide fittings 4 are used alternately.
[0013]
【The invention's effect】
As described above, the present invention can be easily attached to and detached from the power transmission tower, so that the installation position on the power transmission tower can be relatively easily changed from the upper part to the lower part. The transmission tower can be dismantled while hanging down on the inner ground space and moving downward. As a result, it is possible to save the installation space for the crane truck and the crane device on the ground and the working space such as the branch line for operating the bar device as in the related art, and have the effect that the demolition work can be performed efficiently. . In particular, it is most suitable for dismantling power transmission towers in places where it is difficult or inappropriate for a crane truck to enter or carry a crane.
[Brief description of the drawings]
FIG. 1 is a perspective view of a use state of a tower dismantling bar apparatus according to the present invention.
FIG. 2 is a front view in which a part of a rod device is omitted.
FIG. 3 is a perspective view of a mounting bracket.
FIG. 4 is a plan view of a mounting bracket.
FIG. 5 is a perspective view of a guide fitting.
FIG. 6 is a plan view of a guide fitting.
FIG. 7 is an exploded perspective view of a guide fitting.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stand apparatus 2 Mounting bracket 3 Boom 4 Guide bracket 5 Hanging wire 6 Backing plate 8 Stop plate 12 Backing plate 14 Stop plate 16 Receiving plate 17 Bolt 18 Pressing plate 19 Spacer 20 Pulley 21 Pulley T Transmission tower T1 Upper main column T2 Lower pillar material

Claims (4)

In order to dismantle the power transmission tower, in the steel tower dismantling bar device that is sequentially removed from the top of the four main pillars that make up the tower,
A mounting bracket to be attached to a lower main pillar material adjacent below the upper main pillar material to be removed,
A boom whose base end is pivotally supported by the mounting bracket, extends along the upper main column, and has a front end reaching a height position capable of suspending at least the upper main column,
A detachable guide fitting for fixing the middle of the boom to the lower main pillar,
One end is locked to the winch, the middle is hung around the pulley at the tip of the boom, the other end is suspended from the tip of the boom so as to be able to move up and down, and a hanging wire for hanging the upper main pillar is provided. And
After hanging down the upper main pillar material by attaching to the lower main pillar material, the lower main pillar material is moved to the lower main pillar material adjacent to the lower main pillar material, and the lower main pillar material is suspended, and the work is repeated. A bar device for dismantling steel towers, which is dismantled sequentially from the top. The guide metal fitting fixes the middle of the boom to the lower main column material, and after hanging down the upper main column material, guides the boom movably downward. . The guide fitting includes a bolt that is tightened to grip around the boom, and a spacer that is interposed on the shaft of the bolt to restrict tightening and release the boom so as to be movable in the axial direction. 3. The bar assembly for assembling a steel tower according to claim 2, wherein: In the tower dismantling method of dismantling the transmission tower by sequentially removing from the top of the four main pillars constituting the transmission tower,
Fix the boom to the lower main column material adjacent below the upper main column material to be removed,
Hanging the hanging wire around the pulley at the tip of this boom, hanging down the upper main pillar with a winch,
In order to remove the lower main pillar, the boom is moved and fixed to the lower main pillar adjacent to the lower main pillar further below,
A method for dismantling a steel tower, comprising repeatedly dismantling a main pole material and sequentially disassembling a power transmission tower from an upper portion.

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