JPH08303010A - Steel tower-mounted type lifting device - Google Patents

Abstract

PURPOSE: To provide a simple and safe lifting device capable of directly lifting materials up to the neighborhood of an assembly position at the time of assembling the end of steel tower arm outside the working radius of a climbing crane. CONSTITUTION: Mounting brackets 2 are secured to the upper ends of two steel tower main pillars 33 projected upward at an assembly process and, then, the base ends of boom posts are held on the brackets 2. Also, the upper ends of the boom posts are jointed to each other, thereby forming a boom 8 capable of reaching the end of an arm 32. A rod wire 14 for lifting materials is extended along blocks 12, 13 and 15, and led clown to the ground along the post 36 of climbing crane 35 for locking with a winch. Also, one end of a wire 17 for elevating the boom 8 is hooked to the end thereof, and the intermediate section of the wire 17 is led along another block 18 on the post 36 of the climbing crane 35, and led down to the ground along the post 36 for locking with another winch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel tower-mounted hoisting device used for hoisting materials outside the working radius of a climbing crane in the construction of power transmission towers.

[0002]

2. Description of the Related Art For example, in the construction work of a transmission line steel tower 31 shown in FIG. 5, a climbing crane 35 having a jib 37 at the upper end is assembled with a raised pillar 36 at the center of the steel tower 31 under construction. It is used. The material of the tower 31 is hoisted by the climbing crane 35, and the tower is sequentially assembled upward. Then, according to the assembling, the pillar 36 of the climbing crane 35 is raised,
The pillar units are added to the bottom one by one. However,
For example, if the space between the left and right transmission lines is large,
An iron tower of a type in which the arm 32 of the iron tower greatly extends to the side is installed. Therefore, the jib 37 of the climbing crane 35 may not reach the tip of the steel tower arm 32. In this case, the material forming the tip of the arm 32 cannot be directly lifted by the climbing crane 35 to the vicinity of the assembly position.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is a relatively simple and easy method for hoisting the materials directly to the vicinity of the assembling position when assembling the tip of the tower arm extending outside the working radius of the climbing crane. It is an object to provide a safe lifting device.

[0004]

According to the present invention, in order to solve the above problems, the arm 32 is being assembled.
Mounting brackets 2 are fixed to two horizontal points such as the main tower material 33 of the tower whose upper end projects upward, and the base ends of the boom columns 7 are pivotally attached to the respective mounting brackets 2. Are connected to each other to form a hoisting boom 8 that reaches the tip of the arm 32. Pulleys 12, 1 are attached to the tip of the boom 8.
3, the pulley 16 attached to the pulleys 12 and 13 and the pillar 36 of the climbing crane 35 is hung up around the load wire 14 for lifting the material, and the load wire 14 is pulled down along the pillar 36 to the ground. And one end 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 pillar 36 of the climbing crane 35. It was pulled down to the ground and the other end was locked to another winch to construct a hoisting device on the tower.

[0005]

The hoisting device of the present invention is used for hoisting materials when assembling the tip of the arm 32 of the steel tower. Jib 37 of climbing crane 35
Does not reach the tip of the tower arm 32. The boom 8 of the hoisting device of the present invention can reach the tip of the steel tower arm 32 and hoist the material of the arm 32. The boom 8 is composed of two boom columns 7 and 7 assembled in a V shape, and the base end of the boom column 7 is located at the upper end of the tower main pillar member 33 whose upper end projects above the arm 32. Since it is pivotally supported by the mounting brackets 2 provided at such two horizontal points, it is safe without swinging even if a side wind is received. It has a simple structure and is easy to assemble and remove.

[0006]

An embodiment of the present invention will be described with reference to the drawings. 1 is a schematic front view of the 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.

In FIG. 1, reference numeral 31 is a power transmission line tower under construction. The steel tower 31 is an arm 3 that horizontally extends to the side.
2 Main pillar members 33 (two in left and right in FIG. 1, a total of four) constituting the steel tower 31 extend obliquely upward from below, and the upper ends thereof are joined to the base of the arm 32. The upper ends of the left and right main pillar members 33 project upward from the two horizontal steel members above the arms 32, respectively. A post (not shown) is connected to the projecting portion 34 later so that the steel tower 1 can be assembled further upward. A pillar 36 of a climbing crane 35 is erected at the center of the steel tower 31.

The lifting device 1 is equipped with a mounting bracket 2
It is installed on the arm 32. The mounting member 2 is attached to the protruding portion 34 of the main pillar member 33 that protrudes above the arm 32. As shown in FIGS. 3 and 4, the mounting bracket 2
Has a pair of holding members 3 and 4. The protrusions 34 can be sandwiched between the holding members 3 and 4 and tightened with bolts and nuts 5. A universal bearing 6 for connecting the base ends of the boom columns 7 is provided on one of the holding members 3. The boom 8 is composed of two boom columns 7 that are connected in a substantially V shape on the tip side. The boom columns 7 each have a bearing portion 9 on the base end side. Bearing part 9
Corresponds to the universal bearing portion 6 of the mounting member 2 and is freely coupled to each other by a shaft penetrating both. As shown in FIG. 2, a connecting rod 10 for connecting the boom support columns 7 is provided in the middle portion of the boom 8. The connecting rod 10 has a turnbuckle 11 in the middle, and pulls between the boom columns 7 by adjusting the turnbuckle 11.

As shown in FIG. 2, pulleys 12 and 13 are attached to the tip of the boom 8. This pulley 1
Load wires 1 and 2 for lifting materials
The middle of 4 is hung around. That is, as shown in FIG. 1, one end of the load wire 14 is locked to the column 36 of the climbing crane 35 and hangs down via the pulley 12.
The hook is folded back through the pulley 15 and is hung by the pulley 16 attached to the pillar 36 of the climbing crane 35 through the pulley 13 and then pulled down to the ground along the pillar 36 and locked by a winch (not shown). ing. Also,
One end of an undulating wire 17 is locked at the tip of the boom 8. The undulating wire 17 is passed through another pulley 18 attached to a column 36 of the climbing crane 35,
It is pulled down to the ground along the column 36 and is locked by another winch (not shown).

However, in the construction work of the power transmission tower 31, the climbing crane 35 is mainly used for lifting the materials. The hoisting device 1 is used when hoisting the material forming the tip of the arm 32 that the jib 37 of the climbing crane 35 cannot reach. That is, when the steel tower 31 has been assembled to a predetermined portion, the pulleys 16 and 18 are attached to the support column 36, and the attachment fitting 2 is fixed to the protrusion 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 reaches the tip of the steel tower arm 32,
2 materials can be lifted. The hoisting of the material is performed by winding up the load wire 14 with a winch on the ground not shown, and the hoisting operation of the boom 8 is performed by operating the wire 17 with another winch on the ground not shown. The boom 8 is composed of two boom pillars 7, 7 assembled in a V shape, and the base end of the boom 8 is composed of two main pillar members 3
Since it is pivotally supported by the mounting brackets 2 and 2 provided at the upper end of 3, it is safe without swinging even when receiving a side wind. When the boom 8 moves up and down, the universal bearing 6
The angle of the boom strut 7 with respect to the mounting bracket 2 changes without hindrance. It should be noted that any of the wires 14 and 17 can be wound around another route. The mounting site of the mounting bracket 2 is not limited to the upper end of the main pillar 33.

[0011]

As described above, according to the present invention, the fittings 2 are fixed to two horizontal points such as the upper end of the main tower pillar member 33 whose upper end projects above the arm 32, and each mounting is performed. The base end of the boom strut 7 is pivotally attached to the metal fitting 2, and the boom strut 7
End portions of the booms 8 are connected to each other to form a hoisting boom 8 that reaches the tip of the arm 32. Pulleys 12 and 13 are attached to the tip end of the boom 8 to support the pulleys 12 and 13 and the climbing crane 35. A load wire 14 for hoisting material is hung around a pulley 16 attached to 36, and the load wire 14 is pulled down to the ground along a support column 36 and locked to a winch. The side is locked to the tip of the boom 8, the middle is hung on another pulley 18 attached to the support 36 of the climbing crane 35, and it is pulled down to the ground along the support 36, and the other end is engaged with another winch. Since the construction was suspended and a hoisting device was installed on the steel tower, a climbing crane was used to hoist the material of the arm 32, which is a small number for the entire construction. , There is no need to be large in weight. Since the boom 8 is composed of the two boom columns 7, it is safe without swinging even when receiving a side wind. It has an effect that the structure is simple, and it is easy to assemble and remove.

[Brief description of 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 fitting.

FIG. 4 is a schematic plan view of a fitting.

FIG. 5 is a schematic view of conventional steel tower construction work.

[Explanation of symbols]

 1 Lifting device 2 Mounting bracket 7 Boom support 8 Boom 12 Pulley 13 Pulley 14 Load wire 18 Pulley 17 Elevating wire 31 Steel tower 32 Arm 33 Steel tower main pillar material 35 Climbing crane 36 Strut

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Sumitomo Yokoyama, 1 Higashishinmachi, Higashi-ku, Nagoya City Chubu Electric Power Co., Inc. (72) Inventor Harumi Harumi, 3-3-1, Sennen, Minen-ku, Nagoya City Toeneck Head Office Annex Building (72) Toshio Isomura Inventor Toshio Isomura, 3-chome 3 Minen-ku, Minato-ku, Nagoya Annex Main Building (72) Inventor Takaho Iida 3-chome 1-32, Minen-ku, Nagoya-shi Toeneck Head Office Annex (72) Inventor Hiroaki Ueno 6-5-19 Minami-Shinagawa, Shinagawa-ku, Tokyo Sanwa Techchi Co., Ltd.

Claims (4)

[Claims] 1. A hoisting device which is installed on a steel tower under construction and is used outside the working radius of a climbing crane in a steel tower construction work in which a pillar of a climbing crane is erected in the center. Mounting brackets fixed to two horizontal points on the steel tower on the way, a boom composed of two boom columns whose base ends are pivotally attached to each mounting bracket, and tip ends of which are connected to each other, and a material on one end side. It can be suspended, and the middle part is pulled down to the ground along this strut through the pulley attached to the tip of the boom and the pulley attached to the strut of the climbing crane, and the other end is locked to the winch. A load wire and one end of the boom are attached to the tip of the boom, and the middle part of the climbing crane is attached to the pole through another pulley to the ground. It can unloaded, pylons on installation type lifting device and the other end side is provided with a hoisting wire, which is engaged in a separate winch. 2. The hoisting-on-elevator-mounted hoisting system according to claim 1, wherein the fitting is fixed to a projecting upper end of a steel column main pillar whose upper end projects upward during assembly. apparatus. 3. The mounting fixture has a pair of holding members for holding the projecting upper end portion of the main tower pillar material with bolts, and the base end of the boom strut is provided on one of the holding members. The lifting device for stationary installation on a steel tower according to claim 1 or 2, further comprising a bearing portion for connection. 4. The hoisting tower-mounted hoisting device according to claim 1, wherein the attachment fitting has a universal bearing portion for connecting the base ends of the boom columns.