JPH0572491B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cellular deck for constructing a telephone that allows a large amount of wiring to be installed in a concrete floor of a steel frame structure.

(Prior Art) Traditionally, as means for configuring electrical circuits on concrete floors of steel-framed structures, there have been electrical conduits, floor ducts, and cellular ducts buried in concrete.
In addition, there are five types of types that are not embedded in concrete, such as free access type and under carpet type. Among these, the floor duct system is currently the mainstream and is technically established. The floor duct system is a deck with a corrugated cross section in which a horizontal upper flange 1 and a horizontal lower flange 2 are connected via an inclined web 3, with alternating peaks and valleys 5, as shown in FIGS. 4a and 4b. Junction boxes 7 are placed on the peaks 4 of the plate 6 at appropriate intervals.
between the junction boxes 7, three square pipe floor ducts 8 are connected in parallel above the ridges 4 at right angles to the ridges 4, and the height of the juncture boxes 7 is placed on the deck plate 6. It is a composite floor structure made by pouring concrete 9.

However, due to the recent rapid spread of OA, the floor duct system has become unable to adequately accommodate future expansions due to the small cross-sectional area of the floor duct 8. Therefore, assuming that a large amount of wiring is possible and that it can accommodate future increase in wiring, the deck plate 6 is installed as shown in Fig. 5.
A cellular duct system in which a flat bottom plate 10 of approximately the same width is attached to the lower flange 2 by spot welding and a cellular duct 11 is formed below the peak 4 is becoming increasingly popular.

(Problems to be Solved by the Invention) In the cellular duct method described above, fires may occur because the bottom of the cellular duct 11 formed below the mountain portion 4 of the deck plate 6 is only the bottom plate 10. At this time, the electric wires, cables, etc. 12 in the cellular duct 11 burn, and flames and smoke blow out to the upper floor through the junction box 7 provided on the mountain part 4, and the fire spreads. For this reason, as shown in FIG. 5, it is necessary to apply a spray-on fireproof coating 13 such as rock wool to the underside of the bottom plate 10, which requires more time and effort in the construction of the cellular duct method and increases construction costs. There was a problem.

(Object of the Invention) The present invention was made in order to solve the above-mentioned problems, and its purpose is to provide a cellular deck that does not require fireproof coating and can constitute a large-capacity electric circuit. be.

(Means for Solving the Problems) In order to solve the above problems, the cellular deck of the present invention has a horizontal upper flange and a horizontal lower flange connected via an inclined web so that peaks and valleys alternate. A deck plate having a continuous wave shape, a locking part provided in the middle of the inclined web, and a cross-sectional shape having a convex part at the center of the width direction of the lower flange and extending in the longitudinal direction as a whole; It is characterized in that the square pipes arranged in the three valleys are each composed of a cellular duct that is supported and fixed at a distance from the left and right inclined webs and the lower flange using support metal fittings. .

(Function) When assembling the cellular deck configured as described above, the square pipes are spaced evenly from the inclined webs on both sides using support fittings within the three adjacent valleys on the already laid cellular deck. By supporting it at a distance from the lower flange, a three-way cellular duct with a large internal cross-sectional area is formed, and the assembly of the cellular deck is completed. after that,
After installing an insert stud at the required position of each cellular duct, placing a header duct on the deck plate perpendicular to the cellular duct and communicating with the cellular duct, and installing a junction box on the header duct at the communicating part. , by placing concrete on the cellular deck,
A composite slab is obtained, and cellular ducts are buried in the concrete, eliminating the need for fireproof coating.

(Embodiment) An embodiment of the cellular deck of the present invention will be described with reference to FIG. , multiple, in this example 5
The horizontal lower flanges 22 are connected and integrated through the inclined webs 23, forming a waveform in which peaks 24 and troughs 25 are alternately continuous, and further, the upper flanges 22 are connected from the approximate center of each of the inclined webs 23. 21 protrudes outward to become a locking portion 26, and the widthwise central portion of the three middle lower flanges 22 has a dovetail-shaped convex portion 27 in cross-section, and the entire width is It extends in the direction perpendicular to the direction. The lower flanges 22 on both the left and right sides have a width slightly longer than 1/2 the width of the lower flange 22 at the bottom of the valley portion 25, and have a hook-shaped bent portion 28 at the left outer end and a Z-shaped bent portion at the right outer end. A portion 29 is formed. A V-shaped groove 30 is formed in the center portion of the upper flange 21 in the width direction. Each valley 2 of the deck plate 20 having such a structure
5, a square pipe 31 is supported at a distance on the lower flange 22 by support legs 32 fixed at appropriate intervals in the longitudinal direction of the lower surface, and the upper surface is made on the same level as the upper flange 21. And each pipe 31
hook-shaped supports 3 at appropriate intervals in the longitudinal direction of
3 is fitted, the hook portions 34 on both sides are locked to the locking portions 26 of the inclined web 23, and the square pipes 31 are fixed and spaced equally from the inclined webs 23 on both sides, resulting in a 3-way cellular structure as a whole. A cellular deck 36 having a duct 35 is configured.

Cellular deck 36 configured as above
When constructing a composite floor slab for an intelligent building, it is laid with the required spacing between the deck plates to form an electric circuit in the composite floor slab.The assembly work is described below. explain. As shown in FIG. 2a, the deck plate 20' is laid on the beam 37, and the cellular deck 3 is laid at the required position.
Figure 2b shows the deck plate 20 for configuring 6.
As shown in the figure, the deck plate 20' is connected to the adjacent deck plate 20' through the left and right ends and the bent portions 28 and 29, and then laid. Next, a square pipe 31 is supported in the valley part 25 of the deck plate 20 at a distance on the lower flange 22 by the support legs 32 on the lower surface as shown in FIG.
The upper surface is made on the same level as the upper flange 21. Next, hook-shaped supports 33 are fitted at appropriate intervals in the longitudinal direction of the square pipe 31 as shown in FIG. 2d.
The hook portions 34 on both sides are connected to the locking portion 2 of the inclined web 23.
6, the square pipe 31 is fixed at an equal distance from the inclined webs 23 on both sides, a cellular duct 35 is formed in the valley part 25, and a cellular deck 36 is fixed.
Assemble. After that, use the same procedure to install Cellular Deck 3.
6 are assembled and laid with the required spacing between the deck plates 20'. Then each cellular deck 3
6, the cellular duct 35 is installed as shown in FIG. 2e.
Insert studs 39 are screwed into screw holes 38 which are pre-drilled at appropriate intervals in the longitudinal direction.
A header duct 40 is disposed on the deck plate 20 perpendicularly to the deck plate 5 and communicates with the cellular duct 35, and a junction box 41 is mounted on the header duct 40 at the communicating part. After that, the second
After arranging the mesh reinforcements 42 on the deck plates 20 and 20' as shown in Figure g, the concrete 43
When the composite slab 44 is constructed by pouring the concrete, the cellular duct 35 is buried in the concrete 43.
Fireproof coating on the cellular duct 35 becomes unnecessary.

The square pipe 31 in the cellular duct 35 of the cellular deck 36 of the above embodiment is shown in FIG.
You can change it to a built-up type square pipe 45 as shown in Figure b, or change it to an inverted trapezoidal square pipe 46 as shown in Figure b.
Alternatively, it may be changed to an irregularly shaped square pipe 47 as shown in Figure c. Furthermore, the support leg 32 of the cellular duct 35 may be replaced with a support leg 49 formed with a clamping portion 38 that elastically fits into the dovetail-shaped convex portion 27 of the lower flange 22, as shown in FIG. After changing the square pipe 31 to an inverted trapezoid square pipe 46 as shown in e,
The hook-shaped support 33 may be omitted by changing the support leg 32 to a support leg 49' having a clamping part 48' that elastically fits into the dovetail-shaped convex part 27 of the lower flange 22. It is. Furthermore, the square pipe 31 is attached to the lower flange 22 of the inclined flange 23.
As support metal fittings to be supported at a greater distance, instead of the above-mentioned support legs or hook-shaped supports, a suspension plate that is placed and fixed on the upper surface of the square pipe 31 on the left and right upper flanges 21, as shown in FIG. 3f, can be used. 50 may be installed at regular intervals in the longitudinal direction. The square pipe 31 in this case may be an inverted trapezoidal square pipe 46 as shown in Figure g. Furthermore, as support fittings for supporting the square pipe 31 at a distance from the inclined flange 23 and the lower flange 22, stud bolts 51 are installed on the lower flange 22 at regular intervals in the longitudinal direction of both left and right ends, as shown in FIG. 3h. A nut 52 is screwed onto the stud bolt 51, and brackets 53, which are fixed at regular intervals on both sides of the square pipe 31 in the longitudinal direction, are fitted onto the stud bolt 51 and placed on the nut 52. It may be something that supports it. With this type of support fitting, by turning the nut 52, the square pipe 3
There is an advantage that the height at which the cellular duct 35 is formed can be changed by adjusting the height of the cellular duct 1.

(Effects of the Invention) As can be seen from the above description, when assembling the cellular deck of the present invention, a deck plate is laid, square pipes are spaced equally from both sides of the inclined webs using support fittings in the valley, and By supporting it at a distance from the lower flange, the cellular duct can be easily assembled, resulting in extremely good workability.

In addition, an insert stud is erected on the cellular duct in the cellular deck assembled in this way, a header duct is arranged orthogonally to the cellular duct on the cellular deck for communication, and a junction box is installed on the header duct at the communicating part. Since concrete can be placed by arranging mesh reinforcements, there is no need to attach junction boxes to the deck plate body or to drill holes for this purpose, so the strength of the deck plate is not compromised. do not have.

Furthermore, since the cellular duct is supported and fixed at a distance from the bottom flange of the deck plate,
The poured concrete goes around the underside of the cellular duct, and the entire area around the cellular duct is covered with concrete, so there is no need to cover the underside of the deck plate with fireproof covering material.

Furthermore, the cellular ducts buried in concrete as described above serve as reinforcing bars in the valleys of the deck plates of the composite deck, thereby improving the strength of the composite deck.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing one embodiment of the cellular deck of the present invention, Figures 2 a to g are diagrams showing the steps from assembling the cellular deck in Figure 1 to making a composite deck, and Figure 3 a to h are sectional views showing modified examples of the cellular duct in the cellular deck of the present invention, FIGS. 4a and 4b are longitudinal sectional views and side sectional views of the floor electric circuit of the conventional floor duct system, and FIG. 5 is the conventional floor electrical circuit. FIG. 2 is a vertical cross-sectional view showing a cellular duct type floor electrical circuit. 20... Deck plate, 21... Upper flange, 22... Lower flange, 23... Inclined web,
24... Mountain part, 25... Valley part, 26... Locking part,
27... Convex portion, 31, 45, 46, 47... Square pipe, 32, 49, 49'... Support leg, 33
... hook-shaped support, 35 ... cellular duct, 3
6... Cellular deck, 50... Hanging board, 51...
...Stud bolt, 52...Natsuto, 53...Bracket.

Claims (1)

[Claims] 1 A horizontal upper flange and a horizontal lower flange are connected via an inclined web to form a waveform in which peaks and troughs are continuous alternately, and a locking part is provided in the middle of the inclined web, and the center of the lower flange in the width direction A deck plate having a cross-sectional shape with a convex portion and extending in the longitudinal direction as a whole, and 3 adjacent parts of the deck plate.
1. A cellular deck comprising a cellular duct in which rectangular pipes arranged in respective troughs are supported and fixed by support fittings at a distance from left and right inclined webs and a lower flange.