JP4349604B2 - Derrick device for top work of transmission tower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a derrick device used for construction such as replacing a brace projecting on both sides of a power transmission tower with another new brace.
[0002]
[Prior art]
For example, the work for replacing the arm that has been extended on both sides of the power transmission tower with a new arm is performed one side at a time by replacing the other side while maintaining one side in a live line state. Then, to remove the armrest, hang the wire from the pulley attached to the upper armrest, and suspend the removed lower armrest member with this wire. Proceeding with the installation of a new armrest, on the contrary, starting with the upper armrest, the method of lifting the member of the new lower armrest with the wire hung on the pulley of the new upper armrest and proceeding with the work It has been adopted. However, when replacing the uppermost armrest, there is no place to support the pulley for lifting and unloading the old and new members. Therefore, it has been proposed to attach a derrick device to the top of the steel tower and use it to lift the old and new members of the metal arm (Japanese Patent Laid-Open No. 10-102823). This derrick device comprises a support frame attached to reinforce the upper end of the main pillar material constituting the steel tower, four support legs and a boom supported on the support frame. .
[0003]
[Problems to be solved by the invention]
The conventional derrick device can be mounted on a steel tower in which the top of the steel tower is configured to be horizontal and continuous with the uppermost arm bracket, but the ground wire support portion protrudes above the upper arm arm. The steel tower has a problem in that it cannot be installed because the support part cannot be raised due to the ground support part.
Therefore, according to the present invention, the derrick device can be simply configured without raising the support leg at the center of the tower, and thereby, the replacement work of the armature of the power transmission tower can be performed efficiently, smoothly and safely. This is the issue.
[0004]
[Means for Solving the Problems]
In the first aspect of the present invention, the first to third so as to sandwich the main pillar material 34 at positions slightly below the upper ends of three of the four main pillar members 34 constituting the power transmission tower 31. Clamp fittings 2, 3 and 4 are fixed. The first clamp fitting 2 and the second and third clamp fittings 3 and 4 are horizontally coupled by two support beams 5 and 6. The second clamp fitting 3 and the third clamp fitting 4 are horizontally coupled by the first coupling member 14 including the turnbuckles 16 and 17. The first clamp fitting 2 and the intermediate portion of the first coupling member 14 are horizontally coupled by the second coupling member 18 including a turnbuckle. The base end of the boom 7 is pivotally supported by the first clamp fitting 2 so that it can be raised and lowered, and the tip end side is extended to the side of the power transmission tower 31. Further, the base end of the main pillar 8 is supported by the first clamp fitting 2 and is erected vertically. A lifting wire 24 that hangs up and down from a pulley 25 at the tip of the boom 7 is locked to the winch. The base ends of the columns 23 are coupled to the support beams 5 and 6, and the upper ends are coupled to the upper portions of the main columns 8. The main columns 8 are vertically supported by the two columns 23. One end of the boom hoisting wire 26 is locked to the tip of the boom 7, the middle is hung around the pulley 28 at the top of the main pillar, and the other end is locked to the hoisting device 27 for hoisting. Since the main pillar 8, the column 23, and the boom 7 of the derrick device 1 do not stand at the center of the steel tower 31, the ground wire support part 33 protruding upward from the upper end of the steel tower main pillar material 34 does not hinder the operation.
In the invention described in claim 2, the load receiving bracket 19 is further fixed to the main pillar 34 of the power transmission tower located below the first clamp fitting 2. The load receiving bracket 19 and the first clamp fitting 2 are coupled vertically by a third coupling member 22 including a turnbuckle to support the vertical load.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view showing a derrick device for exchanging arm of a power transmission tower, FIG. 2 is a schematic plan view showing the derrick device, FIG. 3 is a plan view of a support part of the derrick device, and FIG. 4 is a derrick device. FIG. 5 is a perspective view of a clamp fitting of the derrick apparatus, and FIG. 6 is a cross-sectional view of a support section of the derrick apparatus.
[0006]
In FIG. 1 and FIG. 2, the derrick apparatus 1 is used to replace the arm 32 that protrudes on both sides of the power transmission tower 31 with another new arm. The derrick device 1 is also used for work other than the replacement work of the brace 32. The replacement of the brace 32 is performed alternately one by one while maintaining one side in a live line state. FIG. 1 shows the replacement work of the upper arm 32 at the top of the steel tower, and the lower arm (not shown) has already been removed. The members are lifted and lowered using the derrick device 1 attached to the top of the power transmission tower 31. The derrick device 1 is provided so as not to interfere with the ground wire support portion 33 protruding from the top of the steel tower.
[0007]
The four main pillars 34 of the power transmission tower 31 are made of angle steel, and are joined to each other by a horizontal web 35 at the upper end. The derrick apparatus 1 is supported on horizontal support beams 5 and 6 fixed to the three main pillar members 34 at the upper part of the steel tower via clamp fittings 2, 3 and 4. The first to third clamp fittings 2, 3, 4 are fixed to the main column member 34 so as to sandwich the main column member 34 at a position slightly below the upper end of the main column member 34.
[0008]
As shown in FIGS. 3 and 4, the first clamp fitting 2 mainly supports the boom 7 and the main pillar 8 of the derrick device 1, and the main body 9 attached to the outside (mountain side) of the main pillar material 34. The fastening member 10 is attached to the inner side (valley side) opposite to this, and is fastened to the main column member 34 by fastening them with bolts. The main body 9 has a bearing cylinder 9a penetrating vertically. The base end side of the main column 8 is inserted and fixed to the bearing tube 9a. As shown in FIGS. 4 and 6, a ring 11 with an ear 11a is fitted between the lower portion of the main column 8 and the clamp metal fitting body 9 so as to be rotatable about its axis. The base end of the boom 7 is pivotably attached to the ear 11a. Therefore, the boom 7 can be swung and raised and lowered with respect to the clamp fitting 2. The clamp metal body 9 includes a pair of support plates 9b arranged in a direction perpendicular to each other, and end flanges 5a and 6a of the support beams 5 and 6 are connected with bolts. Two ears 9 c protrude from the lower portion of the clamp metal body 9. The fastening member 10 includes an ear 10a.
[0009]
As shown in FIGS. 3 and 5, the second clamp fitting 3 and the third clamp fitting 4 have the same structure, and are opposed to the main body 12 attached to the outside of the main pillar 34. The fastening member 13 is attached to the inner side, and is fastened to the main column member 34 by fastening between them with a bolt. The main body 12 has a support plate 12a along one outer surface of the main pillar 34, and supports the support beams 5 and 6 with U-shaped bolts 12b. The fastening member 13 is applied to the inside of the main pillar 34 and has an ear 13a. The ear 13 a faces the ear 10 a of the fastening member 10.
[0010]
The support beams 5 and 6 are made of square pipe steel, and flanges 5a and 6a on one end side are coupled to the first clamp fitting 2 and the other end side is a second or third clamp fitting with a U-shaped bolt 12b. 3 and 4 are supported. The support position by the U-shaped bolt 12 b can be changed according to the size of the steel tower 31. Ears 5b and 6b are projected from upper portions of the support beams 5 and 6 on the other end side.
[0011]
As shown in FIG. 3, the second clamp fitting 3 and the third clamp fitting 4 are horizontally coupled by a first coupling member 14. The coupling member 14 includes a central coupling rod 15 and turnbuckles 16 and 17 coupled to both ends thereof. The coupling member 14 can bear loads in both the axial compression direction and the pulling direction. The connecting rod 15 has ears 15a, 15b, and 15c at both ends and the center. The center ear 15c protrudes in the direction orthogonal to the axis. The ear 15c and the fastening member 10 of the clamp fitting 2 are connected by a second coupling member. The second coupling member includes a turnbuckle 18. The turnbuckle 18 can bear loads in both the axial compression direction and the pulling direction.
[0012]
As shown in FIG. 4, the load receiving bracket 19 is fixed to the main column member 34 at a position below the first clamp fitting 2. The load receiving bracket 19 includes a main body 20 attached to the outside of the main pillar member 34 and a fastening member 21 attached to the inside opposite to the main pillar member 34, and is fixed to the main pillar member 34 by tightening a bolt between them. The The main body 20 includes two ears 20a protruding upward. Between the ear 9 c of the ear 20a and the clamp member 12 is coupled vertically in a third coupling member. The third coupling member includes a turnbuckle 22. The turnbuckle 22 can bear loads in both the axial compression direction and the pulling direction.
[0013]
As shown in FIG. 6, two ears 8 a and 8 b are provided in the vicinity of the upper end portion of the main pillar 8 that stands vertically, and a support column is provided between these two ears 8 a and 8 b and the ears 5 b and 6 b of the support beams 5 and 6, respectively. 23 are connected.
[0014]
As shown in FIG. 1, one end of the lifting wire 24 is locked to a winch on the ground, the middle is hung around a pulley 25 at the tip of the boom, and the other end is suspended from the tip of the boom so as to be raised and lowered. In addition, you may attach a winch on a steel tower.
[0015]
One end of the boom hoisting wire 26 is locked to a hoisting device 27 for hoisting such as a chain block, the middle is hung around a pulley 28 above the main column 8, and the other end is locked to the tip of the boom 7. Is done.
[0016]
The work of replacing the uppermost arm bracket 32 of the transmission tower is performed one side at a time. When the replacement work for one arm 32 is completed, the direction of the derrick device 1 is changed and replaced, and the opposite work is performed. The arm metal 32 is removed from the main pillar 34, and the removed arm metal 32 is suspended to the ground by the derrick apparatus 1. The material constituting the new arm is lifted from the ground by the derrick device 1. In addition, the derrick apparatus 1 can be used also for the replacement work of other lower braces and the work of other facilities of the steel tower.
[0017]
【The invention's effect】
As described above, in the present invention, since the derrick device 1 is assembled to be unevenly distributed on one side of the top of the steel tower, the ground wire support part 33 of the steel tower does not become an obstacle to the operation, and the replacement work of the brace can be smoothly performed. Can proceed to. The load applied to the boom 7 is reasonably supported by the clamp fittings 2, 3, 4, the support beams 5, 6, the coupling members 14, 18, 22, the load receiving fitting 19, etc., and the load is concentrated on a part of the steel tower 31. There is no fear.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a derrick device for exchanging arm of a railway tower.
FIG. 2 is a schematic plan view showing a derrick device.
FIG. 3 is a plan view of a support portion of the derrick device.
FIG. 4 is a perspective view of a lower part of a support of the derrick device.
FIG. 5 is a perspective view of a clamp fitting of the derrick device.
FIG. 6 is a cross-sectional view of a column support part of the derrick device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Derrick apparatus 2 1st clamp metal fitting 3 2nd clamp metal fitting 4 3rd clamp metal fitting 5 1st support beam 6 2nd support beam 7 Boom 8 Main pillar 15 Connecting rod 14 1st coupling member 16 Turn buckle 17 Turnbuckle 18 Second coupling member (turnbuckle)
19 Load receiving bracket 22 Third coupling member (turn buckle)
23 Strut 24 Lifting wire 25 Pulley 26 Boom hoisting wire 27 Hoisting device 28 Pulley 31 Steel tower 32 Top arm metal 34 Main pillar material

Claims (2)

First to third clamp fittings fixed so as to sandwich the main pillar material at positions slightly below the upper ends of the three main pillar members constituting the power transmission tower, and the three main pillar members Two supporting beams for horizontally connecting the first clamp fitting and the second and third clamp fittings fixed to the central main pillar member of
A first coupling member including a turnbuckle that horizontally couples the second clamp fitting and the third clamp fitting;
A second coupling member including a turnbuckle that horizontally couples the first clamp fitting and an intermediate portion of the first coupling member;
A boom whose base end is pivotally supported by the first clamp fittings so as to be able to undulate and turn, and a tip side extends to the side of the power transmission tower;
A base column whose base end is supported by the first clamp metal fitting, and a vertical column; a pair of columns each having a base end coupled to the support beam and a top end coupled to an upper portion of the main column;
One end is locked to the winch, the middle is hung around the pulley at the tip of the boom, and the other end is suspended from the tip of the boom so that it can be raised and lowered,
A boom hoisting wire having one end locked to the hoisting device for hoisting, the middle hung around a pulley on the upper part of the main pillar, and the other end hooked to the tip of the boom;
A derrick device for top work of a power transmission tower, wherein materials are suspended at the top of the power transmission tower. A load receiving bracket that is positioned below the first clamp fitting and is fixed to a main pillar material of the power transmission tower;
The top of the transmission tower according to claim 1, further comprising a third coupling member including a turnbuckle that vertically couples between the load receiving bracket and the first clamp fitting. Derrick device.

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