JPS61277740A - Building panel - 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] (Industrial application field) The present invention is applicable to houses, particularly apartment buildings, where neighboring houses are used.

This invention relates to a construction panel that has the effect of absorbing and insulating vibration noise from an adjacent room.

(Prior Art) In recent years, noise such as the sounds of musical instruments and people's voices coming from the next door or room in apartment complexes has become a major social problem.

Conventionally, in a single concrete wall, the transmission loss TL of air sound follows the following mass law, so the sound insulation properties are improved by increasing the thickness of the wall and increasing the mass. For example, in order to reduce the sound insulation performance (ability to reduce the sound pressure level of generated sound by 50d3 when it passes through a wall) of D-50 according to the Architectural Institute of Japan's standards by 1q, 150m thick concrete (density 2300m/♂) is required. thick walls are required.

(Problem to be Solved by the Invention) However, with the conventional single wall described above, it is necessary to increase the thickness of the wall to improve sound insulation, which increases the weight of the frame and is disadvantageous in terms of structural design. There was a problem.

For this purpose, various hollow double wall structures have been proposed in place of the heavy wall structure. But in this one, frmd
Although it is advantageous because the transmission loss increases in the frequency range between (low frequency resonance transmission frequency) and Fc (coincidence frequency), in addition to the reduction in sparseness due to the coincidence effect, the amount of insulation due to resonance transmission 9 in the low frequency range increases. (see Figure 3), and it is difficult to obtain the sound insulation performance of D-50.

The present invention has been made in view of the above points, and its purpose is to create a structure for architectural panels such as wall materials that utilizes the principle of a dynamic vibration absorber and shifts the coincidence frequency to the higher frequency range. By doing so, the objective is to eliminate the influence of sound insulation deterioration due to the coincidence effect and to reduce low frequency resonance transmission, thereby improving sound insulation performance, without increasing the overall weight.

(Means for solving the problems) In order to achieve the above object, the architectural panel of the present invention has the following features:
A hollow panel body having unidirectional or lattice-shaped grooves on its surface and a hollow part inside, and a rubber or 'Fe foam plastic that is filled and fixed in the hollow part of the hollow panel body and has a spring constant smaller than that of the hollow panel body. It has a structure consisting of an elastic body made of plastic and a high-density body made of metal, mineral, etc. contained within the elastic body.

(Function) With the above configuration, in the present invention, the grooves on the surface of the hollow panel body function to shift the coincidence frequency fc, which is normally in the 500 to 4000 H2 band, to the high frequency side. In other words, in general, as the thickness of the panel increases, the bending rigidity also increases, and the natural vibration frequency shifts to the lower range, but by making grooves on the surface, the bending rigidity of the panel decreases.
The natural vibration frequency also shifts to the higher range side, and as a result, the coincidence frequency fc also shifts to the higher range side, making it possible to increase the coincidence frequency to 13 (fc = 4K) - 12 or more, which reduces the reduction in sound insulation due to the coincidence effect. The impact can be reduced. If the groove is filled with an elastic or viscoelastic material, the energy absorption effect of the elasticity or viscoelasticity will increase the coincidence frequency "G".
This has the advantage of reducing the drop in passing loss.

Furthermore, when the excitation force due to sound waves is applied, the hollow panel itself tries to vibrate, but since the high-density body can move inside the elastic body, when the hollow panel body vibrates, the high-density body tries to vibrate. The body tries to stay in the same position due to its inertia and deforms the elastic body, and a part of the vibration energy of the panel itself is consumed as deformation energy of the elastic body. While the vibration is occurring, the above-mentioned effect continues, and the vibration of the panel itself is reduced and shortened. Moreover, since the system of the elastic body and the high-density body acts as a dynamic vibration absorber for panel vibration, by appropriately selecting the spring constant of the elastic body and the mass of the high-density body, the vibration can be reduced normally in the 63 to 250 Hz band. It is possible to absorb vibrations in the low frequency range by reducing resonance transmission in the low frequency range. Furthermore, it is preferable to mix elastic bodies with different spring constants and high-density bodies with different masses in one panel so that vibrations can be absorbed at the same time when imaging a wide range of frequencies.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 shows an example in which the architectural panel A according to the embodiment of the present invention is applied to a hollow double wall structure. In the figure, 1 is a ceiling slab made of concrete or the like, and below the ceiling slab 1, two architectural panels A and A are used as wall materials, forming a C-shaped channel with a certain gap between them. 2 to f
F L, is fixed upright, and both architectural panels A and A
A glass wool cushioning material 3 is interposed in the gap between them, and a decorative finishing material 4 is placed on the surface of each of the 11 construction panels A.
are attached to form a hollow double wall structure.

As shown in detail in FIG. 1, the construction panel A has a lattice-like groove 5 formed on both surfaces thereof, and hollow parts 6 penetrating the interior thereof formed in horizontal rows. It is composed of a panel body 7, an elastic body 8 filled and fixed in the hollow part 6 of the hollow panel body 7, and a high-density body 9 embedded and contained in the elastic body 8. The hollow panel 7 above is cement-based, calcium silicate, ALC, gypsum-based, particle board, fiberboard, plywood,
It is made of wood cement board, rubber, etc., and is molded by extrusion, pouring, or assembly so that a hollow part 6 is formed inside. Further, the elastic body 8 is made of rubber,
It is made of an elastic material such as foamed plastic or various fibers that has a smaller spring constant than the material of the hollow panel 7. Further, the high-density body 9 is made of a metal having a specific gravity of 2.0 or more (
(iron, lead, etc.) or minerals (rock, sand, etc.), and its shape is not specified, such as spherical, flaky, rod-like, etc., and it is continuous or discontinuous along the hollow part 6. will be placed.

Further, the lattice-shaped grooves 5 are filled with an elastic body 10 having elasticity or viscoelasticity, such as rubber. Note that the grooves 5 may not be in a lattice shape, but may be unidirectional grooves, or may be provided only on one side of the hollow panel 7 instead of on both sides. In addition, in FIG. 2, 11 is a caulking material.

Therefore, in the hollow double wall structure i constructed in this way, the grooves 5 on the surface of the architectural panel A as a wall material shift the natural vibration frequency of the panel A to the higher range side, and the normal vibration frequency is 500-4000t- Since it works to shift the coincidence frequency fc in the 1z band to the higher range side, as shown by the broken line in Figure 3, the coincidence frequency "C" is shifted to the upper range (4KH2 or higher) where it becomes a problem as noise. It is possible to reduce the effect of sound insulation deterioration.

Moreover, since the groove 5 is filled with an elastic body 10 having elasticity or viscoelasticity, the drop in transmission loss at the coincidence frequency fc can be reduced by the energy absorption effect of the viscosity, and therefore, the drop in transmission loss at the coincidence frequency fc can be reduced. It is possible to improve the low-pitched sound performance.

Further, when an excitation force due to a sound wave is applied to the architectural panel 8, the inertia of the granite body 9 causes deformation of the elastic body 8, and the vibration energy of the panel itself is consumed. As a result, the vibration of the architectural panel △ itself is small,
And it is usually shortened to 63~ as shown by the broken line in Figure 3.
It is possible to absorb vibrations in the low frequency range by reducing resonance transmission in the low frequency range of the panel in the 2501-1z band, and it is possible to improve sound insulation performance in the low frequency range.

Specifically, we will create a hollow panel body with a thickness of 40 cm and a hollow ratio of 30% by filling the surface grooves (3 mm width, 5 wrm depth, 300 wm pitch grid shape) with rubber material, and Two architectural panels were made by applying adhesive to the surface of soft urethane foam (20 times foamed) and inserting iron rods into the parts. These architectural panels were made double-sided, and a glass wool cushioning material was placed in the middle. (96 to 9/♂, thickness 40
A double wall with a total thickness of 120 mm was constructed by sandwiching 2 mm), and when it was measured using the sound insulation measurement method specified in JrSA1416, a sound insulation performance of D-50 was obtained.

In the above description, the construction panel of the present invention was used as a wall material, but it can also be applied to other materials such as ceiling materials and floor materials, and the same excellent sound insulation performance can be obtained.

(Effects of the Invention) As explained above, according to the present invention, it is possible to effectively absorb vibrations in the low frequency range (63 to 2501(l)) by acting as a dynamic vibration absorber, and also reduce the coincidence frequency. Since it is possible to shift the D value above the high frequency range to reduce the influence of sound insulation reduction due to the coincidence effect, it is possible to significantly improve sound insulation performance without causing an increase in the weight of the frame. A panel suitable for construction in an apartment complex can be provided.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; Fig. 1 is a slope view of a construction panel, Fig. 2 is a vertical cross-sectional view of a hollow double wall construction state, and Fig. 3 is a diagram showing transmission loss characteristics with respect to frequency. be. A... Architectural panel, 5... Groove, 6... Hollow part,
7...Hollow panel body, 8...Elastic body, 9...High density body, 10...Elastic body.

Claims (4)

[Claims] (1) Consisting of a hollow panel body having unidirectional or lattice-shaped grooves on its surface and a hollow part inside, and a material such as rubber or foamed plastic that is filled and fixed in the hollow part and has a spring constant smaller than that of the hollow panel body. 1. A construction panel comprising an elastic body and a high-density body made of metal, mineral, etc. contained in the elastic body. (2) The construction panel according to claim (1), wherein the hollow panel body has grooves on its surface filled with an elastic or viscoelastic material. (3) The construction panel according to claim (1) or (2), wherein the groove is provided on one side of the hollow panel body. (4) The construction panel according to claim (1) or (2), wherein the grooves are provided on both sides of the hollow panel body.