JP3612366B2 - Tower-mounted lifting device - Google Patents

Description

[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a tower-mounted lifting device used for lifting a material outside a working radius of a climbing crane in a construction work for a transmission line tower.
[0002]
[Prior art]
For example, in the construction work of the transmission line tower 31 shown in FIG. 5, a climbing crane 35 is used in which a lifting column 36 is assembled at the center of the tower 31 under construction and a jib 37 is provided at the upper end. With this climbing crane 35, the material of the steel tower 31 is lifted, and the steel tower is sequentially assembled upward. Then, according to the assembly, the column 36 of the climbing crane 35 is raised, and the column unit is sequentially added to the lower part. However, for example, in the case where the interval between the left and right power transmission lines is large, a steel tower of a type in which the arm 32 of the steel tower protrudes to the side is installed. For this reason, the jib 37 of the climbing crane 35 may not reach the tip of the steel tower arm 32. In this case, the material constituting the tip of the arm 32 cannot be lifted directly to the vicinity of the assembly position by the climbing crane 35.
[0003]
[Problems to be solved by the invention]
Therefore, the present invention provides a relatively simple and safe lifting device that can lift a material directly to the vicinity of the assembly position when assembling the tip of a steel tower arm that extends outside the working radius of the climbing crane. It is an issue.
[0004]
[Means for Solving the Problems]
In the present invention, in order to solve the above-described problems, the mounting bracket 2 is fixed to two horizontal points such as a tower main pillar 33 whose upper end protrudes above the arm 32 during the assembly process. The base end of the boom post 7 is pivotally connected, and the tip ends of the boom post 7 are coupled to each other to form a hoistable boom 8 that reaches the tip of the arm 32, and the pulleys 12, 13 are attached to the tip of the boom 8. The load wire 14 for lifting the material is wound around the pulley 16 attached to the pulleys 12 and 13 and the column 36 of the climbing crane 35, and the load wire 14 is pulled down to the ground along the column 36 to become a winch. Further, another end of the hoisting wire 17 of the boom 8 is locked to the tip of the boom 8, and another pulley 18 attached to the column 36 of the climbing crane 35 at the middle. Multiplied by Hikioroshi to the ground along the column 36, to constitute a steel tower on installation type lifting device engages the other end to another winch.
[0005]
[Action]
The lifting device of the present invention is used for lifting a material when assembling the tip of the tower arm 32. The jib 37 of the climbing crane 35 does not reach the tip of the steel tower arm 32. The boom 8 of the lifting device of the present invention reaches the tip of the steel tower arm 32 and can lift the material of the arm 32. The boom 8 is composed of two boom struts 7, 7 assembled in a V-shape, and the base end of the boom strut 7 is the upper end of the tower main pillar 33 whose upper end protrudes above the arm 32. Since it is pivotally supported by the mounting brackets 2 provided at two horizontal points as described above, it is safe without swinging even if it receives a cross wind. Simple structure, easy to assemble and remove.
[0006]
【Example】
An embodiment of the present invention will be described with reference to the drawings. 1 is a schematic front view of a lifting device, FIG. 2 is a schematic plan view of a boom of the lifting device, FIG. 3 is a schematic front view of a mounting bracket, and FIG. 4 is a schematic plan view of the mounting bracket.
[0007]
In FIG. 1, 31 is a transmission line tower under construction. The steel tower 31 has an arm 32 that projects horizontally to the side. Main pillar members 33 constituting the steel tower 31 (two on the left and right in FIG. 1, a total of four) extend obliquely upward from below, and their upper ends are coupled to the base of the arm 32. The upper ends of the left and right main pillar members 33 protrude upward from the two horizontal steel members at the top of the arm 32, respectively. A pillar (not shown) is connected to the protrusion 34 later, and the tower 1 is assembled further upward. A pillar 36 of a climbing crane 35 is erected at the center of the steel tower 31.
[0008]
The lifting device 1 is installed on the arm 32 by the mounting bracket 2. The mounting bracket 2 is attached to the protruding portion 34 of the main pillar member 33 protruding upward from the arm 32. As shown in FIGS. 3 and 4, the mounting bracket 2 has a pair of clamping members 3 and 4. The clamping members 3 and 4 can be clamped with bolts and nuts 5 with the protruding portion 34 interposed therebetween. On one clamping member 3, a universal bearing portion 6 for connecting the base end of the boom column 7 is provided. The boom 8 is composed of two boom struts 7 connected in a substantially V shape on the distal end side. Each boom post 7 has a bearing 9 on the base end side. The bearing portion 9 corresponds to the universal bearing portion 6 of the mounting bracket 2 and is freely coupled to each other by a shaft passing through the both. As shown in FIG. 2, a connecting rod 10 that couples the boom struts 7 is provided at an intermediate portion of the boom 8. The connecting rod 10 has a turnbuckle 11 in the middle, and is attracted between the boom struts 7 by adjustment thereof.
[0009]
As shown in FIG. 2, pulleys 12 and 13 are attached to the tip of the boom 8. The pulleys 12 and 13 are hung in the middle of a load wire 14 for lifting materials. That is, as shown in FIG. 1, one end of the load wire 14 is locked to the support 36 of the climbing crane 35, hangs down via the pulley 12, turns back through the hook pulley 15, and climbs through the pulley 13. After being hung on the pulley 16 attached to the column 36 of the crane 35, the crane 35 is pulled down to the ground along the column 36 and locked to a winch (not shown). In addition, one end of the hoisting wire 17 is locked to the tip of the boom 8. The hoisting wire 17 is pulled down to the ground along another support pulley 18 attached to the support 36 of the climbing crane 35 and locked to another winch (not shown).
[0010]
Therefore, in the construction work of the transmission line tower 31, the climbing crane 35 is mainly used for lifting the material. And when lifting the material which comprises the front-end | tip part of the arm 32 which the jib 37 of the climbing crane 35 does not reach, the lifting apparatus 1 is used. That is, when the steel tower 31 is assembled to a predetermined portion, the pulleys 16 and 18 are attached to the support column 36, and the mounting bracket 2 is fixed to the projecting portion 34 of the main pillar member located at the base of the arm 32, and the boom 8 is attached thereto. Support. The boom 8 can reach the tip of the steel tower arm 32 and can lift the material of the arm 32. The material is lifted by winding the load wire 14 with a ground winch (not shown), and the boom 8 is raised and lowered by operating the wire 17 with another ground winch (not shown). The boom 8 is composed of two boom struts 7 and 7 assembled in a V shape, and the base ends thereof are pivotally supported by mounting brackets 2 and 2 provided at the upper ends of the two main pillar members 33. Therefore, it is safe without swinging even when subjected to crosswinds. When the boom 8 moves up and down, the angle of the boom column 7 with respect to the mounting bracket 2 is changed without any trouble by the universal bearing portion 6.
Note that any of the wires 14 and 17 can be routed by another route. The attachment part of the attachment fitting 2 is not limited to the upper end portion of the main column member 33.
[0011]
【The invention's effect】
As described above, in the present invention, the mounting bracket 2 is fixed to two horizontal points such as the upper end portion of the tower main pillar 33 whose upper end protrudes above the arm 32, and the boom strut is attached to each mounting bracket 2. 7 is pivotally attached to each other, and the boom struts 7 are joined to each other to form a hoistable boom 8 that reaches the tip of the arm 32, and pulleys 12 and 13 are attached to the tip of the boom 8. The load wire 14 for lifting the material is hung on the pulley 16 attached to the pulleys 12 and 13 and the column 36 of the climbing crane 35, and the load wire 14 is pulled down to the ground along the column 36 and locked to the winch. Further, one end side of the hoisting wire 17 of the boom 8 is locked to the tip of the boom 8, and the middle is hung on another pulley 18 attached to the column 36 of the climbing crane 35, along the column 36. Since it was pulled down to the ground and the other end side was locked to another winch to construct a tower-mounted lifting device, a large climbing crane was used to lift the material of the arm 32, which is a small number for the entire construction, There is no need to increase the weight. Since the boom 8 is composed of the two boom struts 7, it is safe without swinging even if it receives a crosswind. The structure is simple, and it has the effect of being easy to assemble and remove.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a lifting device.
FIG. 2 is a schematic plan view of a boom of the lifting device.
FIG. 3 is a schematic front view of a mounting bracket.
FIG. 4 is a schematic plan view of a mounting bracket.
FIG. 5 is a schematic view of conventional steel tower construction work.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lifting apparatus 2 Mounting bracket 7 Boom prop 8 Boom 12 Pulley 13 Pulley 14 Load wire 18 Pulley 17 Hoisting wire 31 Steel tower 32 Arm 33 Steel tower main pillar material 35 Climbing crane 36 Strut

Claims (4)

In the construction work of a steel tower that is carried out by standing a climbing crane column in the center, it is installed on the steel tower under construction and is used outside the working radius of the climbing crane,
Mounting brackets fixed to two horizontal points on the steel tower during assembly;
A boom composed of two boom struts, the base ends of which are pivotally attached to the respective mounting brackets, and the distal ends are coupled to each other;
The material can be suspended on one end side, and the middle part is pulled down to the ground along this pillar via a pulley attached to the tip of the boom and a pulley attached to the pillar of the climbing crane, and the other end is A load wire locked to the winch;
One end side is locked to the tip of the boom, the middle part is pulled down to the ground along this column through another pulley attached to the column of the climbing crane, and the other side is locked to another winch A tower-mounted lifting device characterized by comprising a wire for undulations. The tower mounting type lifting device according to claim 1, wherein the mounting bracket is fixed to a projecting upper end portion of a tower main column member whose upper end projects upward during assembly. The mounting bracket has a pair of clamping members for clamping the protruding upper end portion of the tower main pillar material with bolts, and a bearing for connecting the base end of the boom column on one clamping member The tower-mounted installation type lifting device according to claim 1 or 2, characterized in that it has a section. 4. The tower-mounted installation type lifting device according to claim 1, wherein the mounting bracket has a universal bearing portion for connecting a base end of the boom column. 5.

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