JPH0350058B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method of constructing a floor slab for office automation.

BACKGROUND ART In recent years, due to dramatic advances in office automation, the spread of so-called OA equipment has been remarkable, and with this, the amount of floor wiring for connecting the terminals of OA equipment has also tended to increase.

Conventionally, most of this type of floor wiring has been done by burying wiring ducts in the concrete of the floor slab, and running wires according to the purpose inside these wiring ducts, but conventional wiring was exclusively used for indoor electrical wiring and telephone wiring. Because the wiring capacity was not very large, the wiring ducts were installed in the concrete of the floor slab in one direction.
It was sufficient to bury ~3 of them.

Problems to be Solved by the Invention However, as mentioned above, due to the remarkable spread of office automation equipment, the types and amount of wiring have increased significantly, and it has become impossible to accommodate them with only one-way wiring ducts. It is also possible to bury the wiring ducts in two directions, crossing each other vertically, but simply installing them one on top of the other will cause various problems, such as making the floor slab considerably thicker.

This invention was made in view of these circumstances, and by maintaining the conventional floor slab thickness (within 15 cm) and making it possible to install wiring ducts in two directions, it is possible to install wiring ducts in two directions. The object of the present invention is to provide a method of constructing a floor slab for office automation that is compatible with automation.

Means for Solving the Problems This invention lays precast concrete plates (hereinafter referred to as PC plates) between beam members, separates the ends of the PC plates for a certain period of time at the upper ends of the beam members, and At the same time, install a wiring duct in one direction along the longitudinal direction of the beam member in the space between the PC boards, and install a wiring duct in the other direction on top of the PC board, crossing this wiring duct. The wiring duct is installed in the concrete of the floor slab by pouring concrete on top of it.

Embodiment Hereinafter, a method for installing a wiring duct according to the present invention will be explained step by step based on FIGS. 1 and 2.

Small beams 2, 2 made of precast concrete members with a channel-shaped cross section are erected at regular intervals in the longitudinal direction of the large beam 1, opening directly below between the large beams 1, 1 made of H-section steel. A required number of stud bolts 1a, . . . are provided protruding from the upper end surface of the girder 1.

Next, several PC boards 3 are placed between the small beams 2, 2,
...to be laid down. Assume that omnia boards are used for PC boards 3,... Furthermore, floor reinforcing bars are placed on top of the PC board 3 if necessary. PC board 3,
3 is placed shallowly on the upper end of the small beam 2, thereby forming a gap 4 that continues in the longitudinal direction of the small beam 2 between the left and right PC boards 3, 3.

Next, connect the wiring duct 5 to the small beam 2 in the space 4.
It is installed along the longitudinal direction of the beam and is appropriately fixed to the small beam 2.

The wiring duct 5 is formed to have a substantially rectangular cross section with a height equal to or smaller than the thickness of the left and right PC boards 3. Further, a required number of access units 6, . . . are attached to the wiring duct 5 at regular intervals in the longitudinal direction of the wiring duct 5. The access units 6, . . . are drawer openings for drawing out various types of wiring within the wiring duct 5 into the room.

Subsequently, a plurality of wiring ducts 7, . . . are installed on the PC boards 3, 3 at regular intervals in the longitudinal direction of the wiring duct 5, and are appropriately fixed. Further, the wiring duct 7 is installed to intersect with the wiring duct 5 at a substantially right angle. Further, the wiring duct 7 is formed to have a substantially rectangular cross section smaller than the wiring duct 5. Further, a required number of insert units 8, . . . are installed in the wiring duct 7 at regular intervals in the longitudinal direction of the wiring duct 7. The insert unit 8 has almost the same role as the access unit 6. In addition, an access hole 9 is provided in the portion of each wiring duct 7 that overlaps with the wiring duct 5, and in this access hole 9, various wiring ducts 7 and 5 are provided.
Connect between.

Subsequently, cast-in-place concrete 10 is poured to a certain thickness on the PC boards 3, . . . , and the wiring ducts 5 and 7 are buried in the concrete 10.

Next, Fig. 3 shows that small beams 2, 2 made of precast concrete members having a T-shaped cross section are erected at regular intervals in the longitudinal direction of the girder 1 between the girders 1 and 1. This is an example different from the example, and is performed in the same order as the following wiring duct installation method.

The upper end surfaces of the access units 6, . . . and the insert units 8, . . . are not completely buried in the concrete, but are exposed on the concrete surface.

Through the above steps, it is possible to construct a floor slab for office automation in which wiring ducts 5 and 7 are installed in two directions in the concrete of the floor slab. Note that the access units 6, . . . of the wiring duct 5 can be pulled out below the small beam 2 if necessary (see FIG. 2).

Effects of the Invention Since the present invention has the above configuration, it has the following effects.

The required number of wiring ducts can be installed in the concrete of a reinforced concrete floor slab in two directions within the conventional floor slab thickness (approximately 15 cm) without reducing the rigidity of the floor slab.

Further, the construction can be carried out regardless of whether the beam member is made of reinforced concrete or steel, and it is extremely easy to construct.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention; Figure 1 is a partial perspective view of a floor slab for office automation showing a method of constructing the floor slab for office automation; Figure 2 is a partial perspective view of a floor slab for office automation; is a partial sectional view thereof, and FIG. 3 is a partial sectional view of another embodiment. 1...Large beam, 2...Small beam, 3...PC board, 4...
... Spacing part, 5, 7... Wiring duct, 6... Access unit, 8... Insert unit, 9...
...Access hole, 10...Cast-in-place concrete.

Claims (1)

[Claims] 1. Lay a precast concrete plate between the beam members, and butt the ends of the PC plates at the upper end of the beam member with a certain distance between them.
A wiring duct in one direction is installed along the longitudinal direction of the beam member in the space between the PC boards, and a wiring duct in the other direction is installed on top of the PC board, intersecting with this wiring duct. A method of constructing a floor slab for office automation, which is characterized by pouring concrete.