JPS5836562B2 - How to get started - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for laying power cables for high-rise building construction work, and more particularly to a method for laying power cables for supplying power to high-rise building construction sites.

Generally, high-rise buildings are built one after another in units of several floors, and each time the tower crane's pedestal must be lifted and the power supply wiring must be installed accordingly. Power for work, etc. must be supplied from the ground.

For this reason, it is common to supply power by running cables to each construction site, but this requires a large number of power cables, which increases the installation space, making it uneconomical and reducing work efficiency. be.

In order to improve this, a power cable with branch lines arranged at desired intervals is prepared in advance, a drum around which the power cable is wound is installed on the ground, and the tip of the power cable is lifted upward as construction progresses. It is proposed to connect the electrical equipment at each construction site to the branch line when it reaches a predetermined point. Since the branch lines also move upward accordingly, there is a drawback that the branch lines corresponding to each floor and the connection lines to the electrical equipment at the construction site must be reconnected.

The present invention is a novel invention that improves the above-mentioned conventional drawbacks, and its purpose is to provide a method for laying power cables that eliminates the need to reconnect branch lines even when the building progresses to the upper floors, and improves workability. It's about doing.

In order to achieve this purpose, the power cable installation method for high-rise building construction of the present invention involves feeding out a power cable with branch lines provided at predetermined intervals from a drum installed on the mount of a tower crane, and When the tower crane is lifted as the construction of a high-rise building progresses to the upper floors, the drum is simultaneously lifted and rotated to feed out the power cable, and a new one is drawn out accordingly. This system is characterized by connecting the power supply line of the construction site on the upper layer to the branch line that has been opened.Examples will be described in detail below.

The figure is an explanatory diagram of an embodiment of the present invention, where 1 is a power cable of a three-core twisted type, etc., and 2at, 2b, . 3 is a drum around which the power cable 1 is wound, 4 is a ground power source, 5 is a tower crane, 6 is a pedestal,
7 is a rotating sheep, and 8a, 8by...8n are power supply lines for each floor.

One end of the power cable 1, which is wound around the drum 3 with a branch line 2at2b;-...2n provided in advance, is connected and fixed to the power source 4 on the ground. The other end of the cable 1 or the final lead-out portion of the branch line is connected for power supply to the tower crane 5.

In addition, the construction site on the first floor is supplied with power by connecting the branch line 2a and the power supply line 8a, and the construction site on the second floor is supplied with power by connecting the branch line 2b and the power supply line 8b. power supply to the construction site.

As the construction progresses, for example, when constructing every third floor, the tower crane 5 is lifted every third floor, and the drum 3 is thereby pulled up, so that the power cable 1 is rewound.

Since the branch line is fed out for each floor, the connection of the branch line on the lower floor remains the same, and the newly drawn out branch line is connected to the power supply line on the upper floor where construction will be performed next. It can be connected to supply power.

In addition, when the tower crane is fixed after being lifted, the drum 3 is fixed so that the extra power cable 1 is not drawn out from the drum 3, or the power cable 1 is fixed at the rotating sheep 7 part.

Further, when lifting the tower crane, the drum 3 rotates, so the power supply line to the tower crane must be disconnected, but if a plug-in system is adopted, the connection and disconnection will be easy.

Alternatively, connect the drum 3 to the tower crane.
If a rotating connection part, such as a slip ring, is provided at an appropriate location, the tower can be lifted up without changing the connection.

Although the drum 3 can be installed using a drum stand, it is also possible to use a double rotating drum without using a stand.

Also, branch lines 2a, 2b,...2n and feeder line 8a@8bp
The connection to the 8n is generally a terminal connection, but a plug-in type connection is also possible.

Moreover, if the power consumption of the construction site on each floor is large, two or more drums 3 can be provided and power can be supplied via a plurality of power cables.

As explained above, according to the power cable installation method of the present invention, power for the construction work of high-rise buildings can be supplied in parallel to each layer with a small number of power cables, the installation space is reduced, and It becomes economical.

Furthermore, as the construction progresses from the lower layer to the upper layer, the drum is pulled up, so the connection between the branch line and the feeder line on the lower layer is step 11, and the feeder line must be connected to the newly drawn out branch line on the upper layer. Since power can be supplied to the construction site on the upper level, the work is simple and can be completed in a short time.

[Brief explanation of drawings]

The figure is an explanatory diagram of an embodiment of the present invention. 1 is a power cable, 2at 2b,...2n is a branch line, 3 is a drum, 4 is a ground power source, 5 is a tower crane,
6 is a mount, 7 is a rotating sheep, 8 a p 8 bs・
...8n is a power supply line.

Claims (1)

[Claims] 1. A power cable with branch points set in advance at predetermined intervals is fed out from a drum installed on the mount of a tower crane, and its end is connected to a power source on the ground. When the tower crane is lifted, the drum is also lifted and rotated at the same time to let out the power cable, and connect the power supply line of the upper construction site to the newly paid out branch line accordingly. Method for laying power cables for high-rise building construction.