JPS61294063A - Float floor structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a floating floor structure, and more particularly to a floating floor structure that has an excellent sound insulation effect and is also excellent in water resistance.

Technical background of the invention and its problems In recent years, Western-style rooms that do not use tatami mats have become more preferred than Japanese-style rooms in Japanese homes. Along with that,
Building materials are also being made from thinner and stronger materials.

Western-style rooms that do not use tatami mats use a lot of thin, strong building materials, so the noise of children jumping around inside the room,
There is an increasing need for countermeasures against noise generated inside a house, such as footsteps in a room, noise generated when moving furniture, etc., or noise such as walking noise in hallways, stairs, etc.

Measures against such noise are particularly important in concrete-based mid-to-high-rise housing complexes such as public housing and private condominiums.

As a noise countermeasure for medium-to-high-rise condominiums in the Concrete 1 system, for example, it is possible to make the concrete slab floor thicker to increase its mass and reduce the natural frequency of the concrete slab, which causes noise. Although this method is known to be good, it is undesirable because it poses problems in terms of earthquake resistance, increases construction costs, and goes against the recent trend of reducing the weight of buildings.

For this reason, glass wool,
Methods have been proposed such as adopting a floating floor structure in which a cushioning material such as rock wool is laid down and a floating floor layer made of concrete is provided on top of this cushioning material. Among these, floating floor structures that use glass wool as a cushioning material are excellent floating floor structures because glass wool has excellent dimensional stability, durability, and heat resistance, but they have the following problems. Ta.

That is, as shown in FIG. 5, the glass wool cushioning material 2
If there is a convex part 12 on the concrete 1 to slab 1 on which a is laid, the concrete slab and the floating floor layer 3, which is also a cement product, may come into direct contact at this part,
A Norland bridge or an acoustic bridge (sound type) may be formed at this contact portion, resulting in a significant reduction in the sound insulation effect. For this reason]]
Before laying the glass wool cushioning material 2a on the slab 1,
The convex portion 12 on the concrete slab 1 had to be removed in advance, which was time-consuming. Furthermore, at the edge of the wall where the side wall 4 rises from the slab floor 1, as shown in FIG. There is a problem in that a gap is generated in the abutting portion 13, a sound bridge is formed, and the sound insulation effect is likely to deteriorate.

In order to solve these problems, there have been attempts to use foamed polystyrene as a cushioning material, but foamed polystyrene itself was too hard to be used as a sound-insulating cushioning material and did not have a satisfactory dynamic spring per unit area. It did not have a constant and could not be used as a buffer material that exhibited excellent performance. For this reason, it has been proposed to use foamed polystyrene, which is obtained by compressing foamed polystyrene and destroying some of the foam cells, as a cushioning material, but this method requires that the foamed polystyrene be compressed in advance. As a result, there are problems in that products tend to vary and molding is time-consuming, and the aforementioned problem of having to match the cushioning material and the upright insulating material at the walls of the slab floor still remains. was.

OBJECTS OF THE INVENTION The present invention attempts to solve all of the problems associated with the prior art as described above, and has the following objects.

(a) To provide a floating floor structure in which even if a concrete slab floor has a convex part, the convex part and the floating floor layer do not come into direct contact with each other, and therefore, a sound bridge is hardly formed and has an excellent sound insulation effect. .

(b) The cushioning material and upright insulating material can be formed integrally so that there is no need to butt the cushioning material and upright insulating material against the wall where the side wall rises from the concrete slab floor, thus providing excellent sound insulation. To provide an effective floating floor structure.

(C) To provide a floating floor structure that has low water absorption and water permeability and can therefore be used on rooftops or stairs exposed to rainwater.

Summary of the Invention The floating floor structure according to the present invention is a floating floor structure in which a floating floor layer is laid on a concrete slab floor through a buffer layer consisting of a buffer material and an upright insulating material. Dynamic spring constant per area is load mass 250 k
It is characterized in that foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene is used, which is 0.8 to 4.8x10 N/m2 in terms of g/m2.

DETAILED DESCRIPTION OF THE INVENTION The present invention will be explained below with reference to embodiments shown in the drawings.
The same members as those shown in the figures and FIG. 6 are given the same reference numerals.

In the floating floor structure according to the present invention, as shown in a schematic cross-sectional view in FIG. 1, a buffer layer 2 as described later is laid on a concrete slab floor 1, and cement A floating floor layer 3, which is a product, is being laid.

This buffer layer 2 is made up of a buffer material 2a and a standing insulating material 2b rising from this end along the side wall, and has a loading mass m 2
0.8 to 4.8x10 N for 50 kq/m”
It has a dynamic spring constant per unit area of /m2 and is composed of foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene.

If the dynamic spring constant per unit area of the cushioning material 2a is less than 0.8x10"N/m2 when the load mass is 250 kg/m2, or exceeds 4.8x106N/m2, the floating floor This is not preferable because the buffering performance deteriorates and a sufficient sound insulation effect cannot be obtained.

Since the cushioning material 2a is made of foamed polypropylene, foamed polypropylene-styrene copolymer, or foamed polyethylene as described above, it is possible to form the cushioning material 2a into a desired complex shape using glass wool, raw wool, etc. It is significantly easier than other methods. That is, as shown in FIG. 2(a), for example, it is possible to integrally form the buffer material 2a directly behind the concrete slab floor 1 and the rising insulating material 2b in contact with the side wall 4 rising from the concrete slab floor. In this respect, the problem that the cushioning material 2a and the upright insulating material 2b are insufficiently butted against each other near the wall, resulting in the formation of sound ridges and a decrease in the sound insulation effect, is completely solved. Also, in some cases,
As shown in FIG. 2(b), units 5a and 5b are prepared, each having a stand-up insulating material 2b standing up along the side wall at one end of a buffer material 2a, and a plate-shaped The buffer layer 2 can also be made in combination with the buffer material 5G. In this way, the cushioning material according to the present invention can be easily installed in rooms of various sizes. Furthermore, in some cases, as shown in FIG. 2(C), the cushioning material 2a and the upright insulating material 2b may be formed separately, and then combined when being laid on the concrete slab 1.

However, in this case, there is a butting part 13 between the cushioning material 2a and the upright insulating material 2b, and there is a risk that a sound bridge will occur in this part, as in the conventional example, and from this point of view it is not preferable. do not have.

In particular, if the flat plate portions 5C of the cushioning material 2a as shown in FIG. 2(b) are connected with a recess 4 as shown in FIG. 2(d), a sound bridge will be formed at this connection. This effectively prevents the sound insulation effect from decreasing.

In addition, in the present invention, although it is necessary for the buffer material 2a to have a specific dynamic spring constant, it is preferable that the upright insulating material 2b is also integrally formed with the same material as the buffer material 2a. The raised insulation material 2b is also the cushioning material 2a.
It is preferable to have a specific dynamic spring constant as well.

Since this cushioning material 2a is made of foamed plastic such as foamed polypropylene having a specific dynamic spring constant, even if there are some convexities 12 on the concrete slab floor 1, these convexities This prevents direct contact between the concrete slab floor 1 and the floating floor layer 3, prevents the formation of sound bridges on the convex portions 12 of the concrete slab floor 1, and provides an excellent sound insulation effect. A floating floor structure with .

Furthermore, foamed plastics such as foamed polypropylene used as the cushioning material 2a have low water absorption and water permeability, and therefore can be used on rooftops, stairs, etc. that are exposed to rainwater.

The cushioning material 2a is usually 2Qmm or more, preferably 25 to 60mm.
The thickness of the raised insulating material 2b is usually 1Qmm or more, preferably 25 to 5Qmm.
It is preferable to have a thickness of .

The floating floor layer 3 is preferably made of cement products such as mortar, concrete, lightweight concrete, or stone, and in the case of mortar concrete, the thickness is 5 Q mm or more, preferably 60 mm or more, and in the case of lightweight concrete, the thickness is 60 mm. More preferably, it is 100 mm or more.

It is preferable that the floating floor layer 3 has a thickness or weight above a certain level as described above. If a floating floor layer having a thickness less than the above range is used, the performance as a floating floor will deteriorate and the sound insulation will be poor. It is not preferable because the effect is not sufficiently recognized.

In the floating floor structure according to the present invention, on the floating floor layer 3,
If desired, a finishing material 6 such as carpet or tatami mats may be laid down.

Also, on the cushioning material 2a, a floating floor layer 3 is laid on top of the cushioning material 2a.
In order to prevent slag, such as concrete forming the structure, from flowing in, it is preferable to lay a waterproof layer (not shown) such as a polyethylene sheet on the upper surface of the buffer material 2a. To prevent moisture from entering the rough concrete slab floor 1,
A polyethylene sheet,
A waterproof and moisture-proof layer (not shown) such as aluminum kraft paper may also be interposed.

Furthermore, in order to prevent cracks from occurring in the floating floor layer 3, a welded wire mesh (not shown) is installed in the floating floor layer 3.
It can also be reinforced by placing reinforcement. In Figure 1, 7 is a partition wall, 8 is a joint bar, and 9 is a partition wall.
is the baseboard.

As mentioned above, the floating floor structure according to the present invention can be used on rooftops or stairs that are exposed to rainwater because the cushioning material has low water absorption and water permeability. An explanatory sectional view is shown in FIG. When the floating floor structure according to the present invention is applied to stairs, the structure is basically the same as that shown in FIG. An integrally formed buffer layer 2 is provided, and a floating floor layer 3 made of stone or cement is fitted into the space surrounded by the buffer layer 2. A non-slip member 10 and a cover 11 are provided on the stepped portion as necessary.

Further, FIG. 4 shows an explanatory sectional view when the floating floor structure according to the present invention is applied to a rooftop. In this case as well, a buffer layer 2 in which a buffer material 2a and an upright insulating material 2b are integrally formed is provided on the concrete slab floor 1 via a waterproof layer 12, and the buffer layer 2 surrounded by the buffer layer 2 is A floating floor layer 3 made of concrete or the like is fitted in the space, and a cover 11 is provided as necessary on the exposed portion of the buffer layer 2. In the description, the cushioning material 2a and the rising insulating material 2b are formed integrally, but the cushioning material 2a and the rising insulating material 2b may be formed separately.

Effects of the Invention In the floating floor structure according to the present invention, foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene having a specific dynamic spring constant per unit area is used as the cushioning material. Even if there is a convex part on the slab floor, the foamed plastic can be deformed according to the convex part, and for this reason, the concrete slab floor and the floating floor layer do not come into direct contact, so it is difficult to form a sound bridge. A floating floor structure with excellent sound insulation effect is obtained.

Furthermore, since the above-mentioned foamed plastics can be easily molded into any shape, it is possible to integrally form the cushioning material and the standing insulating material rising from the cushioning material at an angle of approximately 90'. Therefore, it is possible to eliminate the need to butt the cushioning material and the rising insulation material at the wall where the side wall rises from the slab floor, and in this case, it is possible to prevent the formation of sound bridges at the butt part, A floating floor structure with excellent sound insulation effects can also be obtained.

Furthermore, the above-mentioned foamed plastics have low water absorption and water permeability, so they can be used for floating floor structures such as roofs, stairs, landing areas, terraces, etc. that are exposed to rainwater.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the floating floor structure according to the present invention, and the second
Figures (a) to (d) are cross-sectional views showing a combination of a buffer material and an upright insulating material forming a buffer layer, and Figures 3 and 4 are
The figure is a sectional view showing another embodiment of the floating floor structure according to the present invention, and FIGS. 5 and 6 are explanatory diagrams of drawbacks in the conventional floating floor structure. 1... Concrete slab, 2... Buffer layer, 2a.
...Buffer material, 2b...Insulating material for standing up, 3...Floating floor layer, 4...Side wall. Agent Patent Attorney Shun Suzuki - Department Figure 1 Figure 3 Figure 4 Figure 11 11. Figure 5

Claims (4)

[Claims] (1) In a floating floor structure in which a floating floor layer is laid on a concrete slab floor through a buffer layer consisting of a buffer material and an upright insulating material, the dynamic spring constant per unit area is loaded as a buffer material. 0 if the mass is 250kg/cm^2
．． A floating floor structure characterized in that foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene having a tensile strength of 8 to 4.8 x 10^6 N/m^2 is used. (2) The floating floor structure according to claim 1, wherein the cushioning material is foamed polypropylene. (3) The floating floor structure according to claim 1, wherein the cushioning material and the upright insulating material are integrally formed. (4) The floating floor structure according to claim 1, wherein the end portion of the cushioning material has a connecting portion such as a phase-cut structure.