JPS5847860A - Vibration dampening 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 The present invention is based on a floor slab whose periphery is structurally supported by walls and beams, such as a floor slab in an apartment complex, and on which a floor plate is supported via a vibration isolating material. The purpose of the vibration-proof floor structure is to greatly improve the effect of improving floor impact noise through simple improvements.

In the past, for example, a large number of vibration-proofing materials (75) were arranged in a matrix pattern as shown in Figs. 5 and 6, all of which had the same spring constant.
(3) is a beam, (4) is a closet, and (8) is a floorboard.
In this case, it is difficult to say that floor impact noise has been sufficiently improved. The reason for this is that the impact force tends to be applied evenly to both the center and the periphery of the floor slab, whereas the floor slab of unit a is weaker in the center and stronger in the periphery supported by walls and beams. This is because there is an imbalance (batterers are smaller in the peripheral areas).

Recently, hard anti-vibration materials have been installed around rooms (2 rooms in Figure 5) where heavy wrinkled items such as chests of drawers and other furniture are placed.

It was proposed to use a soft vibration-proofing material in the center, and the mourning
Since it was not about unit floor slabs, there were problems similar to those in 7 above.

The present invention is based on the new viewpoint that it is necessary to use a floor slab whose periphery is structurally supported by walls and beams as a unit in order to reduce the amount of impact. When the supporting action of the floor plate is viewed over the entire area of the unit floor slab, the apparent spring constant per unit area is smaller at the periphery of the floor slab than at the center of the floor slab.

The feature is that the vibration isolating material is provided under the following conditions.

There are three main ways to do this:

(a) A large number of vibration-proofing materials that take advantage of the actual spring constant.

Arrange them in a grid pattern with the same spacing.

The actual spring constant of the vibration isolating material around the periphery is large.

(b) A large number of vibration isolating materials having the same actual spring constant are arranged in a grid pattern with the spacing varying depending on the location. The spacing on the peripheral side is small.

#/) A series of vibration isolating materials are laid over the entire surface of the floor slab, with the density (4/7) being higher on the periphery.

As described above, each of (a), (b), and G'1Ktj has advantages and disadvantages in terms of construction orientation, cost, etc., but in any case, according to the structure of the present invention, the impact force applied on the floorboard is When transmitted to the slab, the structurally weak center of the floor slab -
By making simple improvements, such as rounding, which is supported by walls and beams and transmits more force to the surrounding area of the slab, and reducing the difference in the spring constant of the vibration isolating material, the effect of suppressing floor impact noise is reduced. , we have reached the point where it can be greatly improved.

Examples will be described below with reference to FIGS. 1 and 2.

+13 has a concrete wall for 1114 around it (!)
A floor slab with a similar concrete wall one floor below (
It is a single unit whose periphery is supported by pillars and beams (3). +41 closet, (i) is a window opening, and (6) is a door opening. (7) is a vibration isolating material, and in terms of the actual spring constant, that is, hardness, white circles (0) indicate soft, circles (■) indicate medium, and black circles (•) indicate hard. (8) is the floor plate, and the impact force (reaction force against depression) applied to it is larger on the peripheral side as shown in the graph. (II) is the liner.

[Experiment example]

Table 1 Compression molded glass wool with the performance shown in the table above.

The amount of improvement in transmitted sound ΔL (difference from a bare slab) is obtained by using a nine-vibration isolating material covered with a rubber thin film in the pattern shown in Figure 1.

The unit was dB). Also, all vibration isolating materials are 3.1
In the case of ×10'N/m (conventional example)
However, the vibration isolating material located along the partition wall is 13,1X
Measurements were also made in the case of light (others are as shown above) (comparative example) using the one with 10' N/+m. The results are shown in the table below.

Table 2 shows that if the present invention is applied, the amount of improvement will be greatly increased, and that one partition will be hardened (which will actually produce worse results).

Figure 3 shows the results when the spacing of vibration isolators (7) with the same spring constant is changed, and Figure 4 shows the results of vibration isolators (1) spread over the entire surface of the floor slab (TI). This figure shows the case where the density is higher on the peripheral side.

It is also conceivable to appropriately mix any two or all of the above 311 styles.

In addition, in the case of Figures 1 and 3, the vibration isolating material (7) is a high-density inorganic woven fabric! 11k (glass wool, rock wool, etc.) covered with a thin rubber film, or made entirely of hard rubber. In the case of Fig. 4, the vibration isolating material (7) is preferably bare glass wool or rock wool.

[Brief Description of the Drawings] The drawings illustrate embodiments of the vibration-proof floor structure according to the present invention,
FIG. 1 is a schematic plan view, FIG. 2 is a schematic cross-sectional view also showing a reaction force distribution graph, FIG. 3 is a schematic plan view of another embodiment, and the fourth factor is a schematic cross-sectional view of another embodiment. Further, FIGS. 6 and 6 are a schematic plan view and a schematic plan view of the conventional structure.

Claims (1)

[Claims] ■ A unit floor slab whose periphery is structurally supported by walls and beams (
1) A structure in which a floor plate (8) is supported via a vibration isolating material (1), and the vibration isolating material (7) is placed in the center of the floor slab (1) per unit area. The vibration-proof floor structure is characterized in that the upper spring constant is apparently located at the periphery, but is smaller than that. (2) The vibration-isolating floor structure according to claim 0, wherein one means for the difference in spring constant is a difference in the actual spring constant of a plurality of vibration-proof materials arranged in a matrix pattern. (2) The vibration-isolating floor structure according to claim 0 or 5, wherein the spring constant difference zero means is based on a difference in the arrangement spacing of a large number of vibration-isolating materials () having the same actual spring constant. Φ The vibration-isolating floor structure according to claim 0, wherein the first means for the difference in the spring constant is a difference in the density of a series of vibration-proof materials (7) laid over the entire surface of the floor slab. .