JPS5846993B2 - Method of constructing a steel tower using a lifting crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a steel tower using an elevating crane.

Conventionally, when constructing a steel tower, a tower crane is installed on the ground, the height of this crane is raised according to the height of the steel tower being constructed, and the crane tower is supported by the steel tower being constructed. Alternatively, construction can be carried out from the ground using a truck crane.

However, the former method requires special equipment such as a tower lifting device and a tower horizontal support device, and also requires a location on the ground for installing a crane.

Furthermore, the latter method had problems such as the impossibility of transporting a truck crane if the steel tower was constructed in a mountainous area. This invention was proposed in view of the above-mentioned conventional problems.
To provide a method of constructing a steel tower using an elevating crane, in which the crane is attached to the main pillar of the steel tower under construction by using the main pillar of the steel tower as a post for the crane, thereby eliminating the need for a crane installation location and making the crane itself small and lightweight. The purpose is to

The present invention will be described below with reference to an illustrated embodiment. A crane 1 includes a boom 2, a crane drive device 3, and a base 4.

The boom 2 consists of two booms 2a and 2b and is of a bendable intermediate joint type.

A crane drive device 3 consisting of a hoisting winch 3a and a hoisting winch 3b and a boom 2 are installed on a swivel base 5,
This swivel table 5 is rotatably provided on the base 4.

The crane 1 having such a configuration has a steel tower 6 whose lower part is constructed.
It is fixed to at least one main pillar 7a of the four main pillars 7 at its base 4.

A guide rail 8 is attached to the main column 7a in advance, and the base 4 is fixed to the guide rail 8 by pins 9, 9, and further fixed to the main column 7a by a fixing fitting 10.10.

Furthermore, a level adjustment device 17 is attached to the swivel base 5 for the purpose of correcting the inclination of the swivel base 5 due to root opening of the steel tower 6.

In this situation, the crane 1 lifts the main pillars 7,
Main pillar units 11 and 11a are added to the upper part of 7a, respectively.

As shown in FIG. 2, the main pillar unit 11a has a guide rail 8 in advance, and a pulley 12 is attached to the upper part of the guide rail 8.

Further, a pulley 13 is attached to the swivel base 5, and the pulley 1
A wire rope 14 is wound around 2 and a pulley 13, one end of which is fixed to the upper part of the main pillar unit 11a, and the other end is attached to a hook 16 of a hoisting wire rope 15.

In this state, pins 9, 9 and fixing fittings 10.10
is removed and the hoisting wire rope 15 is hoisted up, and the base 4 rises using the guide rail 8 as a guide.

In this way, the main column unit 11.1 is
1a, then the crane 1 is raised by its own blade using the drive device 3 of the crane 1, and these steps are repeated in order to construct the steel tower 6.

As mentioned above, according to the present invention, the crane is attached to the main pillar of the steel tower under construction, and the crane is supported by the main pillar of the steel tower.Furthermore, the crane ascends by itself after adding the main pillar units, so it does not require the conventional method. No special equipment is required, and no crane installation space is required.

Furthermore, since the two booms can be bent outward from the tower, sufficient work can be done without the booms interfering with the main pillar material during construction on the main pillar side to which the crane is fixed.

Furthermore, by providing the simple Raimifugu equipment, there is no need for the trouble of wiring for climbing, and the workability is very good, and the crane itself has the advantage of being small and lightweight.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a state in which a support column unit is added according to the construction method according to the present invention, and FIG. 2 is a front view showing a similar state in which the crane starts to rise. 1...Crane, 2aj2b...Boom, 3...Crane drive device, 3a...
・Hoisting winch, 3b... Lifting winch, 4
...Base, 5...Swivel base, 6...
... Steel tower, 7.7a ... Main pillar, 8 ...
Guide rail, 9...pin, 10...
Fixing bracket, 11゜11a...Main pillar unit t-
112, 13... Pulley, 14... Wire rope, 15... Wire rope for hoisting, 1
6... Hook, 17... Level adjustment device.

Claims (1)

[Scope of Claims] 1. A truss-type steel tower having a plurality of main columns and tapered upward is constructed using an elevating crane with at least one main column of the steel tower as a guide main column. In the method, the elevating crane includes a base that is removably fixed to the guide main column by a fixing fitting, and a base that is rotatably supported by the base and that is adjusted to the inclination of the guide main column by a level adjustment device. It has a swivel base that can be adjusted horizontally, and an intermediate joint type boom whose base is pivoted on the swivel base and can be bent toward the outside of the tower. A main column unit is added to the top of the main column with the guide, and a lifting rope is often used on a pulley that is detachably fixed in advance to the top of the main column with the guide. A method for constructing a steel tower using an elevating crane, which is characterized by raising the tower to an arbitrary position along the main column, fixing the base to a guide rail, and building the tower in sequence.