JPH0427769B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for installing a temporary power source used when constructing a concrete building having a floor.

<Prior Art> Construction work of buildings made of reinforced concrete or the like involves the use of bolt tightening tools, welding equipment, cutting tools, etc. when assembling formwork and reinforcing bars. And since these tools are usually electric, it is necessary to install a temporary power source.

Incidentally, multi-story concrete buildings are constructed one floor at a time from the bottom to the top, but conventionally, the floor concrete for the floor to be constructed is poured, and after the concrete hardens, the concrete is An electric wire was strung over the top, a connector was connected to one end of the wire, and the other end was connected to the wire to create a temporary power source. The wires for the temporary power source are successively connected to the wires on the lower floors as they advance to the upper floors of the building.

<Problems to be solved by the invention> However, with the conventional method, it is necessary to remove the electric wires running on the concrete throughout the building after each day's work or after the completion of construction work. becomes complicated. Furthermore, since the wires were attached to the floor, it was dangerous for the wires to be stepped on or hit by objects, which could damage the wire sheathing. Furthermore, if the connector is lying on concrete, there is a high risk of electrical leakage or shortcuts if water collects on the floor during rain or the like.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a safe method for installing a temporary power source that can save troublesome removal work, prevent damage to electric wires, and prevent electric leakage and shorts.

<Means for Solving the Problems> In order to achieve the above object, the method for installing a temporary power source of the present invention is a method for installing a temporary power source used when constructing a concrete building with a floor, in which the temporary power source is installed before floor concrete is poured. Arrange the electric wires on the top of the floor formwork,
One end of this electric wire protrudes downstairs, while the other end of the electric wire is placed above the top surface of the floor concrete to be poured, at a flat position excluding the rising parts of walls and columns on the upper floor. After protruding, floor concrete is poured on the upper surface of the floor form, and after the floor concrete hardens, one end of the electric wire protruding to the downstairs side is connected to a power source, and the other end of the electric wire is connected to a connector, The present invention is characterized in that the connecting portion with the connector is enclosed in a support that is removably erected on the concrete floor, and the connector is suspended outside the support.

<Examples> Hereinafter, the present invention will be explained in detail with reference to illustrated examples.

FIG. 1 shows an example of a temporary power source installed by the method of the present invention. This temporary power supply is installed as follows.

First, the upper surface F of the floor formwork 3 before concrete pouring
Place a spacer (not shown) on the
An electric wire 2 coated with is placed. One end of this electric wire 2 is made to protrude from an end (not shown) of the upper surface F of the floor form through a pipe shaft to the downstairs D side, while the other end 2a of this electric wire 2 is made to protrude above the top surface T of the floor concrete to be cast. let The position at which the other end 2a is projected is on a plane excluding rising parts of the exterior of the building, such as walls and pillars on the upper floors, and is at a position that does not interfere with construction work. And the above electric wire 2
After erecting an L-shaped anchor bolt 5 near one end, floor concrete C is placed on the upper surface F of the floor formwork.
to be poured.

After the floor concrete C has hardened, a vinyl tube 6 shorter than the anchor bolt 5 is placed on the floor concrete C with the anchor bolt 5 at the center. This tube 6 accommodates the end 2a of the electric wire 2 inside. V-shaped notches 7 are made in two places at the top of this tube 6. The insulating material 10 covering the electric wire 11 connected to the female connector 8 is tightly inserted into the stopper 12 provided inside the lower end of the notch 7, and the waterproof female connector 8 is suspended from the tube 6. Inside the tube 6, the tip 11b of this electric wire 11 and the electric wire 2 arranged in the floor concrete C
and the other end 2a. At this time, the tip 8a of the female connector 8 is moved from the top surface T of the concrete floor C so that the waterproof male connector (not shown) connected to the waterproof female connector 8 is slightly raised above the top surface of the concrete floor C. I try to keep it at a certain height.

Subsequently, the flange portion 16a of the hemispherical cap 16, which has a hole 15 for inserting the anchor bolt 5 in the zenith portion S, is fitted into the upper end of the tube 6.
Then, the tip 5a of the anchor bolt 5 protruding from the hole 15 is inserted into the nut 1 through a gasket (not shown).
7 to fix the tube 6 and cap 16 onto the top surface T of the concrete floor C.

Finally, one end of the electric wire 2 protruding toward the downstairs D side is connected to a power source from a pipe shaft part of the building (not shown). In this way, installation of the temporary power source is completed.

In the temporary power supply installed using the above method, the waterproof female connector 8 is suspended downward from the stopper 12 of the tube 6, so even if it rains, the rain will not enter into the waterproof female connector 8. Furthermore, since the waterproof female connector 8 is located a certain distance away from the top surface T of the concrete floor C, even if water accumulates on the concrete floor C,
The waterproof female connector 8 and the waterproof male connector connected thereto are not immersed in water, and dangers such as short circuits, shortcuts, and electric shocks can be avoided, and work safety is ensured. Furthermore, since the electric wires 2 and 11 are connected to each other inside the tube 6, electric shocks and the like can be prevented, making it even safer. Furthermore, since the temporary power source does not cross the top surface of the concrete floor C, the work of removing the electric wires at the end of each day's work can be omitted.

The temporary power source can also be used as a temporary power source for interior work, that is, finishing work, after the frame work for constructing the outer shell of the building is completed.

Furthermore, after the construction of the building is completed, the electric wires 2 and 11 and the waterproof female connector 8 on the concrete floor C can be easily removed by simply cutting the electric wire 2 at the very edge of the top surface T of the concrete floor. This eliminates the need for complicated removal work as in the past, improving work efficiency. Further, the cylindrical body 6 can be easily removed by removing the nut 17 and can be used again, which is economical.

By the way, in the above embodiment, the anchor bolt 5 was used to fix the cylinder 6 which is the support body, but instead of this, a cap nut was buried in the floor concrete C and a threaded bolt was screwed into this. Good too.
Further, although the tube 6 is fixed, it may be movable by attaching a handle and placed on the protrusion of the temporary power source. Further, the electric wires 2 and 11 may be connected to each other inside the tube 6 using a harmonica terminal.

<Effects of the Invention> As is clear from the above explanation, according to the temporary power supply installation method of the present invention, one end of the electric wire for the temporary power supply is connected to the downstairs side, and the other end is connected to the upright wall or pillar of the upper floor. After making the floor concrete protrude above the top surface of the floor concrete to be cast at a plane position excluding the position of the part, pour the floor concrete, and after the floor concrete hardens, connect a power source to one end of the above electric wire and a connector to the other end. Since the wires are connected, the wires do not cross the top surface of the concrete floor, so there is no risk of damaging the covered wires, and there is no need to remove them at the end of each day's work. Furthermore, after the construction of the building is completed,
By simply cutting the wires at the concrete floor surface, there is no need to remove the temporary power source, which is the complicated work required in the past, and work efficiency is greatly improved.

In addition, since the connection part with the connector is contained in the support set up on the concrete floor, and the connector is suspended outside the support, it is possible to prevent water from entering the connector.
There is no risk of electrical leakage or shortcuts, ensuring work safety. Furthermore, since the support is removable, it can be reused and is economical.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing a temporary power source installed by the method of the present invention. C...Floor concrete, D...Downstairs, F...Top surface of floor formwork, S...Top portion, T...Top surface of floor concrete, 1, 10...Insulating material, 2, 11...Electric wire, 3... ...Floor formwork, 5...Anchor bolt, 6...
... tube, 7 ... notch, 8 ... waterproof female connector, 16 ... cap.

Claims (1)

[Claims] 1. In a method for installing a temporary power source used when constructing a concrete building with a floor, an electric wire is arranged on the upper surface of the floor form before the floor concrete is poured, and one end of the electric wire is made to protrude to the downstairs side. on the other hand,
After making the other end of the above electric wire protrude above the top surface of the floor concrete to be poured in a plane position excluding the positions of rising parts such as walls and columns on the upper floor, place the other end of the above electric wire on the top surface of the above floor formwork. After pouring concrete and hardening the floor concrete, connect one end of the above electric wire protruding to the downstairs side to a power source, connect the other end of the above electric wire to a connector, and remove the connection part with the above connector onto the floor concrete. A method for attaching a temporary power source, characterized in that the connector is enclosed in a support that can be erected, and the connector is suspended outside the support.