JP3983107B2 - Steel tower device and steel tower dismantling method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a base bar device for efficiently dismantling a power transmission tower from above and a dismantling method using the same.
[0002]
[Prior art]
Conventionally, in the dismantling work of a power transmission tower, large facilities such as crane trucks and crane devices are installed and installed around the power transmission tower, and the components of the steel tower are sequentially removed and suspended.
[0003]
[Problems to be solved by the invention]
In the conventional crane vehicles and crane devices described above, it may be difficult or inappropriate to enter a crane vehicle such as an urban area or a mountainous area or to carry a crane. In such a case, a base bar device is simply used. This base bar device attaches a boom to one of the four main pillar members constituting the power transmission tower, and suspends the other main pillar member with a suspension wire that winds the main pillar member with a winch. The position adjustment of the boom in the front-rear direction is performed by operating the hoisting operation wire from the tip of the hoisting operation wire on the ground via a guide pulley on the steel tower. Positioning of the boom in the left-right direction is performed by placing branch lines for turning operation on both the left and right sides of the boom and operating this from the ground. And the pedestal device moves the steel tower downward from the upper part and removes the main pillar material sequentially.
However, in this pedestal device, a branch line for turning operation and a wire for undulation operation must be stretched on the ground, and a space must be provided on the ground so as not to hinder the operation.
Therefore, an object of the present invention is to provide a tower demolition pedestal device and a demolition method that can be easily detached from an existing power transmission tower, can take up installation space, and can efficiently dismantle the power transmission tower.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the invention of this application, a mounting rod 2, a boom 3, a guide fitting 4, and a suspension wire 5 are provided to constitute a pedestal device for dismantling a steel tower. The mounting bracket 2 is detachably attached to the lower main pillar material T2 adjacent to the lower side of the upper main pillar material T1 to be removed from the steel tower T. The boom 3 has a base end pivotally supported by the mounting bracket 2, extends along the lower main column member T2 and the upper main column member T1, and has a tip portion that can suspend the upper main column member T1 after disassembly. To the position. The guide metal fitting 4 is detachably attached to the lower main pillar material T2 in order to fix the middle of the boom 3 to the lower main pillar material T2. One end of the hanging wire 5 is locked to the winch, the middle is hung around the pulley 20 at the tip of the boom 3, and the other end is suspended from the pulley 20 and locked to the upper main column member T1. The guide fitting 4 includes a bolt 17 for gripping the periphery of the boom and a spacer 19 interposed on the shaft of the bolt 17 in order to fix the middle of the boom 3 to the lower main pillar material T2. The spacer 19 holds the boom 3 movably in the axial direction by restricting tightening around the boom by the bolt 17.
In addition, the invention of this application provides a new dismantling method of a steel tower using the above-mentioned bar device. In this method, the base rod device is sequentially moved downward on the four main pillar materials, and is sequentially disassembled from the upper main pillar material T1 to the lower main pillar material T2 and suspended by the base rod device. Process. The step of fixing the mounting bracket 2 to the lower main column material T2 adjacent to the lower main column material T1 to be removed, the guide metal fixture 4 is attached to the lower main column material T2, and the bolt 17 of the guide metal fixture 4 is tightened The process of gripping the middle of the boom 3 with the guide metal fitting 4, the step of locking the tip of the suspension wire 5 to the upper main column member T1, and then disassembling the upper main column member T1, the disassembled upper main column The process of suspending the material T1 to the ground with the winch and the suspension wire 5, after the disassembled upper main pillar material T1 is suspended to the ground, the lower main pillar material T2 on which the base bar device is supported is to be removed. In order to do this, in the step of moving the boom 3 to the lower main columnar member T2 that is further adjacent to the lower main columnar member T2, the bolt of the guide fitting 4 that holds the middle of the boom 3 in the step of moving the boom 3 Loosen 17 A step of holding the boom 3 movably in the axial direction by interposing a spacer 19 on the shaft of the bolt 17, and then moving the mounting bracket 2 to the lower main pillar material T <b> 2 while moving the boom 3 to the guide bracket 4, a step of moving the guide bracket 4 downward, a step of fixing the mounting bracket 2 moved downward to a predetermined position of the lower main pillar material T2 below, and another guide metal fixture 4 on the lower main pillar material T2 below. Mounting, tightening the bolts 17 of the guide fitting 4 and gripping the middle of the boom 3 with the guide fitting 4, and then removing the guide fitting 4 with the spacer 19 interposed from the main pillar material T2. This is a method for dismantling the steel tower.
While the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to this.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
In FIG.1 and FIG.2, the base-bar apparatus 1 is attached to the main pillar material T1 in order to dismantle this to the power transmission tower T. In FIG. The base bar device 1 includes a mounting bracket 2 for mounting on the main pillar member T1, a boom 3 standing on the mounting bracket 2, a guide bracket 4 for fixing the boom 3 and guiding movement, The boom 3 is provided with a suspension wire 5 for suspending used materials such as the main pillar material T1.
[0006]
As shown in FIGS. 3 and 4, the mounting bracket 2 is provided with a contact plate 6 that forms a substantially right angle along the inner side thereof in order to be attached to the main pillar material T <b> 2 that is an angle steel material. On both plate surfaces of the abutting plate 6, three lateral bolt insertion holes 6 a are provided in the upper and lower sides. A stop plate 8 for sandwiching both edge portions of the main pillar material T1 with the contact plate 6 and fixing them with bolts 7 is coupled to the contact plate 6. The stop plate 8 is formed with a step that coincides with the both side edges of the main column T2 and the contact plate 6 so as to coincide with the main column T2 surface and the contact plate 6 surface. A horizontal plate 9 is fixed horizontally inside the abutting 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 contact plate 6 in the vertical direction.
[0007]
As shown in FIGS. 1 and 2, the boom 3 is made of a steel pipe material, and has a clevis 3 a for pivotally supporting the eye 10 of the mounting bracket 2 at the lower end. A pulley 20 for hanging the suspension wire 5 is suspended from the attachment piece 3b at the tip of the boom 3, and a pulley 21 for guiding the suspension wire 5 is provided on the lower attachment piece 3c. The mounting piece 3b is provided so as to be rotatable about the axis with respect to the boom 3, so that the suspension wire 5 is fed out from the pulley 20 with respect to the inclination angle of the main column members T1 and T2 to the inside of the steel tower, so-called rolling angle. Can be arranged on the back side of the boom 3 and workability when the hanging wire 5 is tied to the material can be taken into consideration. One end of the suspension wire 5 is fastened with materials such as the upper main pillar material 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 metal fitting 4 is attached to the lower main pillar material T <b> 2 connected to the lower side of the upper main pillar material to be disassembled . The guide fitting 4 includes a contact plate 12 that is refracted substantially at right angles along the inner side of the main pillar material T2 . The contact plate 12 is provided with two lateral bolt insertion holes 12a in the vertical direction. The backing plate 12 is provided with a stopper plate 14 that overlaps with this and sandwiches both side edges of the main column T2 with the backing plate 12 and couples them with bolts 13. The stop plate 14 is formed with a step that matches the surface of the main column T2 and the surface of the contact plate 12 so as to overlap both side edges of the main column T2. A receiving plate 16 that is curved in a circular arc shape and receives the side surface of the boom 3 is fixed vertically to the inside of the backing plate 12 via a pair of horizontal plates 15 that are spaced apart vertically. A holding plate 18 having an arc cross section that holds the boom 3 is fixed to the receiving plate 16 with a bolt 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 bar apparatus 1, four main lower pillars T <b> 2 that form the tower T in order to sequentially remove from the upper one T <b> 1 among the main pillars T <b> 1 and T <b> 2 connected to the upper and lower sides constituting the transmission tower T. Attach to each. First, the mounting rod 2 is attached to the lower main column member T2, the boom 3 is supported by the lower main column member T2, and the guide bracket 4 is attached to the lower main column member T2 to fix the boom 3. In the mounting bracket 2, the contact plate 6 is applied to the inner side of the lower main column member T2, the stop plate 8 is stacked so as to straddle the contact plate 6 and both side edges of the lower main column member T2, and the bolt 7 is inserted into the long hole 6a. Insert and tighten. The clevis 3a of the boom 3 is pin-coupled to the eye 10 of the mounting bracket 2. The guide metal fitting 4 has the contact plate 12 applied to the inner side of the lower main column member T2, the stop plate 14 is overlapped so as to straddle the both ends of the contact plate 12 and the lower main column member T2, and the bolt 13 is inserted into the long hole 12a. It is inserted and tightened, and fixed to the lower main pillar material T2. The guide fitting 4 is held by clamping the boom 3 between the receiving plate 16 and the holding plate 18 and fastening with the bolt 17.
[0010]
The hanging work is performed by first tying the material such as the upper main pillar T1 or the diagonal member attached thereto to the suspension wire 5, and then removing the material from the steel tower T and guiding it with the lower pulley 21 while grounding the winch. The material is suspended in the ground space inside the steel tower T by operating.
When the mounting piece 3b is provided so as to be rotatable around the axis of the boom 3, the mounting piece 3b is turned so that the pulley 20 is placed on the back side of the boom 3 which is inclined by the turning angle together with the main column members T1 and T2. If it arrange | positions, since the suspension wire 5 is drawn | fed out from the pulley 20 on the same side as the main pillar material T1 with respect to the boom 3, workability | operativity when the suspension wire 5 is tied to material becomes favorable. In this case, after the suspension wire 5 is tied to the material, the material is swung and disposed on the ventral side of the boom 3, and then the material is suspended in the same manner as described above.
[0011]
When the upper main column member T1 disassembled by the base bar device 1 is suspended, the bolt 7 of the mounting bracket 2 and the bolt 13 of the guide bracket 4 are loosened to remove the brackets 2 and 4, and then the lower main column member T2 is removed. The pedestal device 1 is moved and attached to the lower main pillar material T2 that is further adjacent to the lower main pillar material T2 to be removed, and the removal operation of the upper main pillar material T2 is similarly performed. These operations are performed for each of the four main pillar members that form the transmission tower T, and the transmission tower T is sequentially disassembled from the upper part to the lower part.
[0012]
When the base rod device 1 is shifted to the lower main column member T2, 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 spacer 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 column T2, and the boom 3 is moved to the lower main column T2 adjacent to the lower portion of the mounting bracket 2 as well. After that, the mounting bracket 2 and another new guide bracket 4 are fixed in the same manner as before. At this time, since the boom 3 is guided in the axial direction by the previous guide metal fitting 4, the boom 3 is not toppled over and is not easily shaken in the lateral direction, so that the operation is safe and easy. The guide metal fitting 4 used for the movement of the boom 3 is removed from the main pillar material T2 after the transition of the boom 3. 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 changed relatively easily from the upper part to the lower part. The power transmission tower can be dismantled while hanging down on the inner ground space and moving downward. As a result, it is possible to save work space such as crane vehicles and crane devices on the ground and operation branch lines of the base bar device as in the prior art, and it is possible to efficiently perform the dismantling work. . In particular, it is most suitable for dismantling power transmission towers in places where it is difficult to enter cranes or carry cranes, or where it is not appropriate.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a perspective view of a tower tower dismantling device according to the present invention in use.
FIG. 2 is a front view in which a part of the base bar 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 Bar apparatus 2 Mounting bracket 3 Boom 4 Guide bracket 5 Suspension wire 6 Stopping plate 8 Stopping plate 12 Stopping plate 14 Stopping plate 16 Receiving plate 17 Bolt 18 Presser plate 19 Spacer 20 Pulley 21 Pulley T Transmission tower T1 Upper main pillar T2 Lower main pillar material

Claims (3)

In order to dismantle the transmission tower, the main pillar material for the tower dismantling used for the work of dismantling and hanging down the four main pillar members that form the steel tower from the upper main pillar material to the lower main pillar material,
A mounting bracket that is detachably attached to a lower main pillar material adjacent to the lower part of the upper main pillar material to be removed;
A boom whose base end portion is pivotally supported by the mounting bracket, extends along the lower main column material and the upper main column material, and a tip portion reaches a height position at which the upper main column material after disassembly can be suspended. When,
In order to fix the middle of the boom to the lower main pillar material, a guide fitting removably attached to the lower main pillar material,
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 pulley, and includes a hanging wire that can be locked to the upper main pillar material,
The guide metal fittings are bolts that grip around the boom in order to fix the middle of the boom to the lower main pillar material;
A tower disassembling pedestal device comprising a spacer interposed on the shaft of the bolt for holding the boom movably in the axial direction by restricting tightening around the boom . 2. The tower dismantling device for tower demolition according to claim 1, wherein the pulley is supported at a tip end portion of the boom so as to be rotatable around an axis of the boom . A tower dismantling method in which the base bar device according to claim 1 is sequentially moved downward on the four main pillar members, and then disassembled and suspended from the upper main pillar member to the lower main pillar member,
Fixing the mounting bracket to the lower main pillar material adjacent to the lower part of the upper main pillar material to be removed; and
Attaching the guide fitting to the lower main pillar, tightening the bolt of the guide fitting, and gripping the middle of the boom with the guide fitting;
A step of disassembling the upper main pillar member after locking the tip of the hanging wire to the upper main pillar member;
A step of suspending the disassembled upper main pillar material to the ground with the winch and a suspension wire;
After the disassembled upper main pillar material is suspended to the ground, the lower main pillar material, which is adjacent to the lower main pillar material, is further adjacent to the lower main pillar material so as to be removed. And a step of moving the boom to the pillar material,
In the step of moving the boom, loosening the bolt of the guide fitting holding the middle of the boom, and interposing a spacer on the axis of the bolt, thereby holding the boom movably in the axial direction; ,
Next, while moving the mounting bracket to the lower main pillar material below, the step of guiding the boom to the guide bracket and moving downward,
Fixing the mounting bracket moved downward at a predetermined position of the lower main pillar member below;
A process of attaching another guide fitting to the lower lower main pillar member, tightening a bolt of the guide fitting, and gripping the middle of the boom with the guide fitting,
Next, a method of dismantling the steel tower , comprising the step of removing the guide metal fitting provided with the spacer from the main pillar material .

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