JP4974275B2 - Tower assembly for steel tower assembly - Google Patents

Description

  The present invention relates to a pedestal device for attaching materials for assembling a large steel tower by attaching the small steel tower to a small steel tower in order to rebuild an existing small steel tower.

Conventionally, in a construction for rebuilding an existing small steel tower to a large steel tower, materials such as steel tower components are lifted and assembled by a large crane vehicle. Further, in places where it is difficult to enter a crane vehicle such as an urban area or a mountainous area, a base bar device is simply used. In this pedestal device, a boom is tied and fixed to the top of a small steel tower with a rope. The position adjustment of the boom in the front-rear direction is performed by operating the hoisting operation wire from the tip thereof on the ground via a guide pulley on a small steel tower. After determining the horizontal position of the boom, the guide pulley is fixed according to the direction. Positioning of the boom in the left-right direction is performed by extending branch lines on the left and right sides of the boom and operating this from the ground. The boom is constructed so that it can be raised and lowered, and it is used for the work of assembling large steel towers in sequence by lifting the suspension wire from the tip of the boom and lifting the material on the ground. The suspension wire is operated on the ground via the base of the boom. After assembling the large steel tower to the height near the top of the small steel tower, move the base bar device to the large steel tower under construction and continue the construction.
Further, there is a derrick device described in Patent Document 1 in which a support frame in which a frame material is provided between main column members at the upper end of the steel tower is provided on the steel tower, and a boom is supported by the frame material so as to be raised and lowered. This device pivotally supports a pair of front legs and rear legs on both ends of the opposing frame member, pivots the upper ends of the front legs and rear legs to the coupling member, and connects the boom hoisting operation wire to the coupling member and the boom. The material is hung on a pulley between the front end portion, locked to a hoisting winch on the ground, and the hoisting wire is operated by the hoisting winch on the ground to suspend the material by the boom 4.
JP-A-10-102823

In the conventional base bar device, since the boom is tied to the steel tower and attached, the operation is not easy. Also, since the branch line is stretched from the left and right sides of the tower to fix the horizontal position, it is difficult to work while lifting the material while balancing the left and right branch lines. The boom tends to swing left and right and cannot be positioned reliably. Moreover, if the direction of the guide pulley on the small steel tower is determined and fixed in accordance with the horizontal direction of the boom, the hoisting operation of the boom cannot be performed using the hoisting operation wire. Despite such complicated work, construction in urban areas must be completed in a short period of time.
In the derrick device described in Patent Document 1, the horizontal direction of the boom is fixed, and the material raising / lowering position cannot be changed according to the installation environment of the steel tower.
Therefore, the present invention can be attached to an existing small steel tower, the horizontal positioning of the boom is easy and reliable, its position can be easily changed, and the work efficiency of the steel tower assembly can be improved. It is an object of the present invention to provide a tower assembly base bar device that can shorten the work period and that can be smoothly raised and lowered regardless of the direction of the boom.

In order to solve the above-described problem, in the first invention, the mounting frame 2 is fixed to the upper part of the existing small steel tower T, the swiveling member 4 is supported by the mounting frame 2 so as to be rotatable in the horizontal direction, and desired. The boom 9 is fixed at an angular position, the base end of the boom 9 is connected to the swinging member 4 so as to be able to move up and down, one end of the lifting wire 11 is locked to the winch, and is hung around the tip of the boom 9 through the steel tower T. The material can be raised and lowered, and one end is locked to the hoisting winch. The steel tower T is passed through the tower T between the tower T above the mounting frame 2 and the tip of the boom 9. The tower assembly pedestal device 1 was constructed so as to perform the lifting work of the materials necessary for assembly.
In the second aspect of the invention, the connecting member 7 is pivotally supported by the fixed portion 6 fixed to the mounting frame 2 so as to be rotatable in the horizontal direction to form the turning member 4, and the fixed portion 6 has a desired horizontal angle. A plurality of insertion holes 6a whose positions can be selected are provided, the base end of the boom 9 is connected to the connection part 7 so as to be raised and lowered, and the fixing pin 8 is alternatively inserted into the insertion hole 6a to connect the connection part 7 to the fixing part 6 Against the desired angle.
In the third aspect of the invention, guide pulleys 14 and 15 are disposed at the vertical positions of the small steel tower T in order to guide the hoisting operation wire 10 for raising and lowering the boom 9 that changes the rotational position in the horizontal direction to the ground via the small steel tower T. The guide pulley 14 is pivotally supported on a vertical support pipe 14a provided on the small steel tower T so as to be pivotable in the horizontal direction, and the support pipe 14a is received so as to receive the undulation operation wire 10 passing through the support pipe 14a. A guide pulley 15 was placed at the bottom.

  In the present invention, the device can be easily attached to or detached from the existing small steel tower via the attachment frame, and the horizontal positioning of the boom is easy and reliable, and can be prevented from shaking to the left and right. The horizontal position of the boom can be changed easily, the position of raising and lowering materials can be adjusted according to the installation environment of the tower, and the efficiency of assembling the tower is improved. The guide pulley swings and adjusts to the direction when adjusting the pivot position of the boom, so there is no need to adjust the direction of the guide pulley, and the boom hoisting operation wire does not deviate from the guide pulley. It has the effect of being guided smoothly.

An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1 and FIG. 2, in order to newly install a large steel tower (not shown) so as to cover the existing small steel tower T, the base bar device 1 is attached on the small steel tower T and used for the assembly work of the large steel tower. This bar apparatus 1 is attached to a small steel tower T by an attachment frame 2. The attachment frame 2 is substantially rectangular so as to be fitted to the outside of the top of the small steel tower T. As shown in FIG. 6, the mounting frame 2 is fixed to the structural member T1 of the steel tower with the mounting bracket 3. The mounting bracket 3 includes a contact plate 3a to the component material T1 and upper, lower, left and right small angle bolts 3b that surround the component material T1 and are screwed to the contact plate 3a. As shown in FIGS. 3 to 5, the mounting frame 2 is composed of angle members 2 a on four sides, and is fixed to each other by angle bolts 2 b.

  Revolving members 4 are provided at both ends of the mounting frame 2. As shown in FIGS. 7 and 8, the pivot member 4 includes a boom beam 5 made of H-shaped steel which is fixed by an angle bolt 5 a across the center of the mounting frame 2 in the horizontal direction, and the boom beam 5. A fixing plate 6 fixed to the base plate 6, a connecting plate 7 that is pivotally supported by the fixing plate 6 and the boom beam 5 so as to be pivotable horizontally, and connects the boom 9, and a fixing pin 8. A large number of insertion holes 6a through which the fixing pins 8 can be freely inserted and removed are provided at substantially equal angular intervals on the arc-shaped edge of the fixing plate 6. A vertical shaft 7a projects downward from one end of the connecting plate 7, and brackets 7c are provided on both side edges so as to support the boom 9 with a connecting pin. A pulley mounting piece 7c for the guide pulley 18 is provided at the end. The connecting plate 7 has an insertion hole 7d corresponding to the insertion hole 6a, through which the fixing pin 8 is removably inserted to prevent the insertion.

  As shown in FIG. 1, a pulley 12 for hanging the hoisting operation wire 10 and a pulley 13 for hanging the suspension wire 11 are pivotally supported at the vertical position of the tip of the boom 9. The hoisting operation wire 10 is guided from the pulley 12 to the guide pulleys 14 and 15 provided on the small steel tower T and reaches the ground. The suspension wire 11 is guided from the pulley 13 to the guide pulley 16 suspended on the pulley mounting piece 7c of the turning member 4 and reaches the ground. By operating the hoisting operation wire 10, the boom 8 moves up and down to move the hanging wire 13 back and forth, and by operating the hanging wire 11, the hanging metal fitting such as a hook suspended on the pulley 13 is moved up and down.

  As shown in FIGS. 9 and 10, the guide pulleys 14 and 15 are provided on a pulley mounting frame 16 attached to the small steel tower T. The pulley mounting frame 16 has substantially the same configuration as the mounting frame body 2 in order to be fitted and fixed to the outside of the top portion of the small steel tower T. A undulation beam 17 is fixed in the horizontal direction at substantially the center of the pulley mounting frame 16. Guide pulleys 14 and 15 are provided at both ends of the undulation beam 17. The guide pulley 14 is pivotally supported on an upper portion of a support tube 14a that is pivotally supported by the undulation beam 17 in a horizontal direction. The guide pulley 15 is pivotally supported at a lower portion of the undulation beam 17 so that the position thereof is shifted back and forth so as to face the support tube 14a. A wire 10 for raising and lowering the guide pulley 14 is inserted into the support tube 14a so that it can be received by the guide pulley 15 regardless of the direction of the guide pulley 14.

  In this pedestal device 1, the mounting frame 2 and the pulley mounting frame 16 are respectively attached to the upper and lower positions near the top of the small steel tower T so as to be fitted to the outside. The mounting frame 2 and the pulley mounting frame 16 can be easily and securely fixed to the component T1 simply by screwing the small angle bolt 3b of the mounting bracket 3, and can be easily removed by loosening and removing the small angle bolt 3b. The boom 8 is connected to the mounting frame body 2, the hoisting operation wire 10 is hung on the guide pulleys 14 and 15 on the pulley 12 and the pulley mounting frame 16, and the suspension wire 11 is hung on the pulleys 13 and 18. If the boom 9 is swung by the swivel member 4 and directed to a desired horizontal angle, and the fixing pin 8 is inserted into the insertion holes 5a and 7d, the boom 9 is securely fixed without shaking in the left-right direction. At this time, even if the boom 9 is turned to change the position, the guide pulley 14 swings in accordance with this, but the receiving position of the guide pulley 14 of the hoisting operation wire 10 does not change, and the hoisting operation wire 10 is reliably accepted without losing. By adjusting the vertical angle of the beam 9 with the hoisting operation wire 10, the hanging wire 11 can determine the front-rear position, and can lift and lower the material.

It is a front view of the tower | rod tower apparatus for steel tower assembly which concerns on this invention. It is a top view of a bar apparatus. It is a front view of an attachment frame. It is a top view of an attachment frame. It is a side view of an attachment frame. It is a front view of a mounting bracket. It is a front view of a turning member. It is a top view of a turning member. It is a front view of a guide pulley. It is a top view of a guide pulley.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bar apparatus 2 Mounting frame 3 Mounting bracket 3b Small angle bolt 4 Turning member 5 Boom beam 6 Fixing plate 6a Insertion hole 7a Shaft 7c Bracket 7 Connecting plate 8 Fixing pin 9 Boom 10 Lifting operation wire 11 Suspension wire 14 Guide Pulley 14a Support tube 15 Guide pulley 16 Pulley mounting frame T Existing small steel tower T1 Constituent material

Claims (2)

A mounting frame fixed to the upper part of an existing small steel tower;
A swiveling member that is rotatably supported by the mounting frame in the horizontal direction and fixed at a desired angular position;
A boom whose base end is connected to the swivel member in a undulating manner;
One end is locked to the winch, passed through the steel tower, hung around the tip of the boom, and a lifting wire capable of raising and lowering materials,
A boom hoisting operation wire which is hung between a steel tower above the mounting frame and a tip of the boom and has one end locked to a hoisting winch through the steel tower;
The swivel member is fixed to the mounting frame and has a plurality of insertion holes that can select a desired angular position in the horizontal direction;
A fixed pin that is pivotally supported by the fixed portion so as to be pivotable in the horizontal direction, connects the base end of the boom so as to be raised and lowered, and is selectively inserted into the insertion hole of the fixed portion to prevent rotation at a desired angle. A connecting portion to penetrate,
A tower device for assembling a steel tower, which performs a lifting work of materials necessary for assembling a large steel tower on the existing small steel tower.   In order to guide the hoisting operation wire from the boom to the ground via the steel tower, the upper part is attached to the steel tower and is pivotally supported by a vertical support pipe provided in the steel tower so as to be pivotable horizontally 2. The tower according to claim 1, further comprising: a guide pulley, and a lower guide pulley provided at a position facing a lower portion of the support pipe so as to receive a wire for raising and lowering operation that passes through the support pipe. Assembly bar device.

Images