JPS6342058B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound insulation structure used for a concrete wall.

In buildings used for housing complexes, hotels, etc., a high degree of sound insulation performance is required for parting walls between adjacent units or adjacent rooms to ensure privacy. Therefore, in the case of cast-in-place concrete buildings, It is necessary to have a structure that has sufficient sound insulation performance, including the interior base.

Therefore, the interior foundation construction method used for cast-in-place concrete buildings is the gypsum board direct pasting method B, in which a gypsum board 3 is crimped onto one concrete wall via a mortar adhesive 5, as shown in Figure 4. There is also a construction method C in which mortar or plaster 6 is troweled onto one surface of a concrete wall as shown in Figure 5.

However, although the former B has many advantages in terms of workability and the like, the mortar adhesive 5 that supports the gypsum board 3 increases rigidity and allows vibrations to be propagated efficiently. As a result, as shown in curve B in Figure 3, this construction method B has sound insulation properties in the low frequency range (around 250Hz).
There is a noticeable drop in the high frequency range (near 4KHz), and these frequency bands correspond to the vowels and consonants of speech, and the disadvantage is that the transmitted sound from the next door can be clearly heard.

The latter C has almost good sound insulation performance (curve C in Figure 3), but has the drawbacks of contaminating the room due to the wet construction method and requiring a long construction period, approximately 20 days including curing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a sound insulation structure that provides a large improvement in sound insulation in the medium and high sound ranges, has a short construction period, and does not pollute the interior of the room during construction.

A feature of the present invention is that a surface material such as a gypsum board is attached to a concrete surface via an elastic support means, and a support plate for attaching this elastic support means to the concrete surface has a buffer material and a spring effect located on the buffer material. It consists of an elastic support fitting that fixes the fitting member, and a mounting member that is removably fitted with the fitting member. In the present invention, by elastically supporting the surface material with respect to the basic frame, the bass resonance frequency is shifted to a lower region, and the influence of fixed vibration due to the reduction in the rigidity of the surface material is reduced, and as a result, This provides a high degree of sound insulation performance.

Embodiments of the present invention will be described based on the drawings. As shown in the first diagram, the sound insulation structure A according to the present invention includes:
A gypsum board 3 is attached to a concrete wall 1 via elastic support means 2 with tapping screws. As shown in the second figure, the elastic support means is composed of an elastic support fitting 21 and a mounting member 22 that is removably fitted to the elastic support fitting. In the elastic support fitting 21, a fitting member 213 is positioned on the upper surface of the central bent portion 211a of the support plate 211 with a buffer material 212 interposed therebetween, and is integrally coupled with screws 214. The fitting member 213 is made of a material that has a spring effect such as phosphor bronze, and is formed so that both ends are branched into a fork shape, each bent in an arc shape, and the tip thereof is bent in the opposite direction. . The mounting member 22 has a U-shaped long column, and has long grooves 22 at a predetermined interval in the center.
a is bored, and when it is fitted with the fitting member 213, it is fitted in a four-point supported state as shown in Figure 1, and this material is made of lightweight material such as light iron, non-ferrous metal, or synthetic resin. The material is selected and molded as appropriate. Therefore, the mounting member 22 is connected to the fitting member 2.
13, it can be fastened with one touch. By aligning the opening of the mounting member 22 with the position of the fitting member 213 and fastening the fitting member 213, the mounting member 22 can be smoothly adjusted by rotating the screw 214 from the opening to the right or left. Then, the gypsum board 3 is attached to the mounting member 22.
are joined together using a tapping screw (not shown). As shown in the first figure, glass wool 4 is filled in the air space between the gypsum board 3 and the concrete wall 1 to prevent standing waves.

An example of improved sound insulation using the present invention is a concrete frame with a thickness of 200 mm.
When applied to both sides of a concrete structure with an air layer thickness of 25 mm, as shown by curve A in Figure 3, the maximum increase in the frequency range of 200 Hz or higher is over 10 dB compared to the conventional direct plasterboard installation method B. Significant sound insulation improvement can be achieved, and similar sound insulation improvement can be achieved compared to mortar or trowel finishing method C.

As described above, according to the present invention, the mounting member is elastically supported by the fitting member having a spring effect, and the cushioning material is interposed between the fitting member and the support plate, so that a high vibration isolation function is achieved. The result is a remarkable effect of improving sound insulation performance over the entire band, and it also has a significant effect of shortening the construction period and preventing indoor contamination during construction.

[Brief explanation of the drawing]

FIG. 1 is a sectional view, FIG. 2 is a perspective view of the elastic support means, FIG. 3 is a graph showing the sound insulation effect, and FIGS. 4 and 5 are sectional views showing examples of conventional structures. 1... Concrete wall, 2... Elastic support means,
3... Surface material, 21... Elastic support fitting, 22...
Mounting member, 211... Support plate, 212... Cushioning material, 213... Fitting member.

Claims (1)

[Scope of Claims] 1. An elastic support fitting attached to a concrete surface, and an elastic support fitting attached to a surface material facing the concrete surface at a predetermined distance and detachably fitted to the elastic support fitting. The elastic support fitting is equipped with a mounting member having a shock absorbing material and a fitting member having a spring effect located on the shock absorbing material, which is attached to a support plate to be attached to a concrete surface. , wherein the fitting member elastically supports the mounting member. 2. The sound insulation structure according to claim 1, wherein the surface material is gypsum board or plywood. 3. The sound insulation structure according to claim 1, wherein the fitting member has a shape that supports the mounting member at four points.