JPH0252742B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double floor construction method for increasing heat insulation and sound insulation effects and improving livability in reinforced concrete buildings, steel frame buildings, wooden buildings, etc.

Conventional double floor construction methods include the Ohiki joist method, the laying floor method, and the foam material laying method, but each of these methods had major drawbacks. These construction methods will be explained below. is the most common construction method,
As shown in Fig. 1, large joists 1 are fixed on the subfloor b at regular intervals with anchor bolts 2, etc. On top of this, joists 3 are assembled at regular intervals in a direction perpendicular to the large joists 1. This is a construction method in which the upper floor c is formed by pasting a plywood board 4 and a finishing material 5 on top, and (a) the floor squeaks easily, resulting in poor sound insulation, (b) the floor height becomes high, and (c) There are many disadvantages, such as moisture accumulating in the space between the lower floor and the upper floor, which becomes a breeding ground for pests. is the second
As shown in the figure, this is a construction method in which a support 13 with anti-vibration rubber 12 is attached to a panel or systemized joist 11 and placed on the subfloor b, (a) the floor height becomes higher; (b) The disadvantage is that moisture accumulates in the space between the lower and upper floors, creating a breeding ground for pests. As shown in FIG. 3, a layer of foamed material 21 is formed on the lower floor b, and then a plywood board 23 is fixed to the joists 22, and a finishing material 24 is pasted on top of this to form the upper floor c.
This construction method has the disadvantage of poor sound insulation.

The present invention simultaneously eliminates the drawbacks of the above conventional methods,
This is a double floor construction method that allows comfortable living with a low floor height.A hollow plastic board with many holes arranged parallel to the surface is laid directly on the subfloor or via a flat layer. This is a double floor construction method characterized by supporting the upper floor. In other words, whereas in the past, wood such as large joists, supports, foam materials, etc. were used as supporting members to support the upper floor.
In the present invention, special hollow plates are used alone or in combination with flat layers.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained in detail below with reference to the drawings. FIG. 4 is a longitudinal sectional view showing an example of a double floor formed by the construction method of the present invention, FIG. 5 is a perspective view of a hollow plate, and FIG. 6 is a sectional view taken along the line AA in FIG. 5. When constructing the double floor shown in FIG. 3, wooden or plastic joists 32 are first fixed at regular intervals on the concrete or other subfloor b using bolts, concrete nails, adhesives, or the like. After that, sand is spread on the subfloor b to form a flat layer 33. At this time, the surface of the flat layer 33 is made flat at the same level as or slightly higher than the topmost part of the joist material 32. After that, hollow plate 3
1 is spread on the flat layer 33 and fixed to the joist material 32 with nails, wood screws, etc. Finally, a plywood board 34 and a finishing material 35 are sequentially pasted onto the hollow board 31 to form the upper floor c.

The hollow plate 31 is made of plastic, and as shown in FIGS. 5 and 6, a large number of holes 31a are arranged in parallel on its surface. For this reason, the hollow plate 31
A layer of air, which is an ideal insulating material, is formed inside the hood, so it exhibits excellent insulation performance and there is little risk of condensation. Regarding sound insulation, the wall parts that partition the holes in the hollow plate 31 act as cushions, making it difficult for vibrations to be transmitted from the top to the bottom, and the vibrations at the top vibrate the air inside the holes to do their work. , a significant sound insulation effect is achieved by reducing vibration energy. Sufficient strength can be obtained by appropriately designing the plate thickness, hole size, and spacing. It is also much more rigid than conventional foamed plastics, and there is no risk of creating squeaks. Appropriate plate thickness is about 5 to 25 mm.
The type of plastic used as the material is not particularly limited, but polyethylene and polypropyne are suitable, for example.

The flat layer 33 is constructed to fill the gap between the subfloor and the hollow plate when the subfloor is not flat, but it also has the effect of improving heat insulation and sound insulation. Although sand is used in this embodiment, the flat layer is not limited to this, and the flat layer may be formed using, for example, mortar, plaster, foamed concrete, or the like. If the subfloor is sufficiently flat, such as by directly pressing concrete, the hollow board can be attached directly on top of it using an adhesive, etc., without constructing a flat layer.

The upper floor is supported by a hollow board, and it is common to construct a finishing material 35 on a plywood board 34 as in this embodiment. However, the veneer board 34 is not necessarily required; for example, a finishing material such as a parquet block can be applied directly onto the hollow board to form a top floor. In addition, when using plywood board,
It is convenient to attach this and the hollow board in advance before construction.

As mentioned above, the construction method of the present invention has a structure in which the upper floor is supported by laying hollow boards with excellent heat insulation and sound insulation performance, so the double floor formed by this method has excellent heat insulation and sound insulation properties, and there is little risk of condensation. ,
Provides comfortable living. In addition, with the conventional double floor construction method, the floor height from the top of the lower floor to the top of the upper floor needed to be at least 80 mm to ensure comfortable living, but with the construction method of the present invention, this can be reduced by less than half. Therefore, the ceiling height of the living room can be increased, or the floor height of the building can be lowered, making it more economical. Moreover, the construction method of the present invention is easy to construct and contributes to labor saving on site.

[Brief explanation of the drawing]

Figures 1 to 3 are vertical cross-sectional views of double floors formed using the conventional construction method.
The figure relates to the floor construction method, and Figure 3 relates to the foam material laying method. FIG. 4 is a vertical cross-sectional view showing an example of a double floor formed by the construction method of the present invention, FIG. 5 is a perspective view of a hollow board,
FIG. 6 is a sectional view taken along line AA in FIG. 5. b...Lower floor, c...Upper floor, 1...Ohiki material, 2...
...Anchor bolt, 3, 11, 22, 32... Joist material, 4, 14, 23, 34... Laminated plywood board,
5, 15, 24, 35... Finishing material, 12... Anti-vibration rubber, 13... Supporting tool, 21... Foaming material, 31...
...Hollow plate, 31a...hole, 33...flat layer.

Claims (1)

[Claims] 1. In a double floor construction method in which an upper floor is constructed on a lower floor via supporting members, a hollow plastic plate with a large number of holes arranged in parallel on its surface is placed directly or flat on the lower floor. A double floor construction method characterized by supporting the upper floor through layers. 2 Fix the floor joists at appropriate intervals on the subfloor, form a flat layer of sand so that the top surface is at the same level as the top of the joists, or a little higher, to form a flat layer, and place the hollow sand on the flat layer. Lay the boards and secure them to the joists,
The double floor construction method according to claim 1, wherein a plywood veneer serving as an upper floor and a finishing material are attached on top of this to support it.