JP2001262730A - Sound insulating wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulating wall structure for a boundary wall or partition wall for improving sound insulating performance especially in a low frequency zone. SOLUTION: In this structure provided with membrane material 4 between gypsum boards 6, 7 or the like, the membrane material 4 is installed in a loosened state to be capable of vibrating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulating wall structure such as a boundary wall or a partition wall, and more particularly to a sound insulating wall structure capable of improving sound insulating performance in a low frequency range.

[0002]

2. Description of the Related Art In a sound insulation wall such as a partition wall, there is a weight rule that the sound insulation performance of a wall is higher as the surface weight of the wall is larger. Conventionally, in order to increase the surface weight of the wall, a synthetic resin such as vinyl chloride or asphalt is mixed with iron powder to increase the specific gravity. The method has been adopted.

[0003] Gypsum board has a specific gravity of 0.8 g / cm.
³ , there is a drawback that if the number of stickers is increased because they are smaller than the sound insulation sheet or the lead plate, the wall thickness becomes thick and the room becomes narrow. In addition, since the sound insulating sheet and the lead plate have a high specific gravity, there is an advantage that even a thin sheet has a large surface weight, and the wall thickness can be reduced as compared with the case where the gypsum board is additionally attached.

Conventionally, since these sheets are usually used in a size corresponding to the pitch of the studs, the sheets are attached without slack, and thereafter, a gypsum board is attached.

[0005]

However, in the case where the above-mentioned additional gypsum board or the like, or a sound insulating sheet or a high specific gravity sheet such as a lead plate is attached without loosening, the sound insulating performance cannot be improved more than the weight law. .

On the other hand, JP-A-11-247321 discloses that
A sound insulation wall structure with improved sound insulation performance in the coincidence frequency range is disclosed. However, even with this structure, in a low frequency range, the sound insulation performance cannot be improved more than the weight law. In particular, it is well known that the decrease in the coincidence frequency range is reduced when the thickness is increased, when gypsum boards having different thicknesses are laminated, and when a sound absorbing material is contained in a hollow layer. In such a case, the sound insulation performance is determined not at the coincidence frequency range but at a low frequency range of 125 Hz. Therefore, it is desired to improve the sound insulation performance in a low frequency range.

Here, the weight rule will be described. Sound transmission loss (sound insulation performance) TL ₀ when sound is vertically incident on a wall
Is given by an equation, and when measured in a reverberation room or the like, sound randomly enters, so that the transmission loss TL can be obtained by the equation.

(Equation 1)

(Equation 2) m is the areal density of the wall (kg / m ² ), f is the frequency (H
z) This equation shows that the sound transmission loss (TL ₀ ) can be increased only by 5 dB even if the surface weight of the wall is doubled.

As described above, in the prior art, even if a high-density sound insulation sheet or lead sheet is used, the sound insulation performance is improved only by an increase in weight. For example, assuming that the surface weight of a dry double wall using gypsum board is about 40 kg / m ² , the sound insulation performance is only 1.6 dB even if the surface weight is increased by 10 kg / m ^{2 according} to this weight rule. Does not improve.

The cause is considered to be that the gypsum board is stuck directly on the sound insulation sheet or the lead sheet, and this sheet is restrained by the gypsum board and cannot be freely vibrated.

The inventors of the present invention have conducted various researches and developments on these points, and as a result, the object is to increase the weight of the film material formed of the sound insulating sheet in the entire frequency range, particularly in the low frequency range, with a simple structure. Another object of the present invention is to provide a sound insulating wall structure capable of improving sound insulating performance.

[0011]

The sound-insulating wall structure of the present invention comprises:
In a sound insulation wall structure including a film material between inorganic molding plates such as gypsum board, the gist is that the film material having a surface density of ² to 10 kg / m ² is attached so as to be vibrated in a loosened state.

A feature of the present invention is that the membrane material is provided on the wall structure so that it can vibrate in a loosened state. In the prior art, the membrane material merely serves to increase the weight of the gypsum board. Since the film material is provided directly or in a state where it is not loosened, the film material is hardly vibrated or hardly vibrated.

[0013] The vibrating means that the membrane material and the gypsum board are not bonded to each other, but the membrane material to be fixed between the stud and the gypsum board is provided in the wall structure by loosening, or the stud and the gypsum board are not provided. This is made possible by providing a spacer between them.

In order to vibrate the membrane material in a relaxed state, when forming a partition wall, the membrane material is relaxed within a range of 3 to 15% of a fixed stud spacing. Also,
In a configuration in which a spacer is interposed between the stud and the gypsum board, the thickness of the spacer is desirably 3 to 10 mm. In the configuration in which the fibrous sheet is interposed between the membrane material and the gypsum board and fixed to the stud, the thickness of the fibrous sheet is 3
８8 mm is desirable.

Here, the resonance frequency of the film material will be described. The resonance frequency of the membrane material provided so as to be able to vibrate is given by the following equation.

(Equation 3) m is the areal density of the wall (kg / m ² ), L is the air layer behind the membrane material (m)

An example will be described. For example, areal density 2-10
Since the thickness of the hollow layer in the case of a general boundary wall is about 100 mm using a film material of kg / m ^2, the resonance frequency is 60 to 134 Hz according to the equation. That is, when the film material resonates, it is converted into transmitted sound vibration energy near the resonance frequency, and is absorbed in the film material, so that the transmitted sound is reduced. Therefore, the sound insulation performance of the partition wall is often determined at 125 Hz, and the sound insulation performance can be improved by the film material absorbing sound in the low sound range around this.

The film material to be used is a sound insulating sheet in which iron powder is mixed with asphalt, a sound insulating sheet in which iron powder is mixed with synthetic resin such as vinyl chloride, a synthetic resin such as iron plate and lead plate, rubber, vinyl chloride, and a fibrous sheet. Such sheets can be used. In particular, sound insulation sheets and rubber sheets have viscoelasticity and are highly effective.

The density of the sound insulating sheet mixed with iron powder is about 4 g.
So / ^{m 3,} when the surface density 2 to 10 kg / ^{m 2,} the thickness becomes 0.5 to 2.5 mm. The density of the iron plate is 7.9
g / m ³ , the thickness is 0.25 to 1.3 mm.
Since the density of the lead plate is 11.3 g / m ³ , the thickness is 0.1%.
8 to 0.9 mm. The density of rubber and vinyl chloride is 1
g / m ³ , the thickness is 2 to 10 mm.

In the case of the present invention, the areal density is 2 to 10 kg / m
^The reason for setting to ² is that a small film material having an area density of less than 2 kg / m ² cannot obtain a sufficient improvement in sound insulation performance, and a film material having an area density exceeding 10 kg / m ² is effective. However, considering actual construction, practicality such as difficulty in handling is considered.

[0020]

According to the present invention, sound energy can be converted into vibration energy by vibrating the film material by providing the film material on the wall structure so that the film material can vibrate in a relaxed state.
In addition, the sound insulation performance is improved by increasing the weight of the film material, and the sound transmission to the sound receiving room can be suppressed by both the sound insulation performances.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are cross-sectional explanatory views showing embodiments of each example in which the present invention is used for a partition wall of a building.

FIG. 1 shows a first embodiment, in which a partition wall 1 is provided with studs 2, 2,... In a staggered manner, and a rock wool 3 is arranged between adjacent studs 2, 2. I have. The film material 4 is loosely attached to one surface of the predetermined studs 2, 2,... With a screw or a tucker 5 so as to vibrate, and two gypsum boards 6, 7 are respectively attached from both surfaces to the partition wall 1. Is configured.

The loosened state is desirably 3 to 15% with respect to the stud spacing fixed as described above, but preferably 4 to 10%. If the slack is small, the film material 4 does not vibrate sufficiently. Conversely, if too large, the film material 4
The amount of used is large, which is uneconomical, and the workability is deteriorated. In this embodiment, the film material 4 is provided on one surface of the stud 2, but may be provided on both surfaces. It goes without saying that providing the film material 4 on both surfaces increases the sound insulation performance.

FIG. 2 shows a second embodiment, in which the partition wall 10 is different from the above-described example in that a spacer 11 is interposed between the columns 2 for fixing the film material 4. In this case, the thickness of the spacer 11 is 3 to 10 as described above.
mm, it is not necessary to attach the film material 4 in a loosened state. It is sufficient to extend the film material 4 and attach it with the spacer 11 as usual.
Other configurations are the same as those in the first embodiment, and a description thereof will be omitted. Although the film material 4 is provided on one surface of the stud 2, it may be provided on both surfaces. It is needless to say that providing the film material 4 on both surfaces has higher sound insulation performance.

If the thickness of the spacer 11 is less than 3 mm, the film material 4 comes into contact with the gypsum board 6, which undesirably hinders the vibration of the film material 4. Also, if the thickness is 10
If the thickness is larger than mm, the thickness of the wall becomes thicker, which causes a disadvantage that the room becomes narrower, which is not preferable. In any case, a space that does not hinder the vibration of the film material 4 is required.

FIG. 3 shows a third embodiment, in which a partition wall 15 is formed by further attaching a fibrous material 16 to the upper surface of the membrane material 4 fixed to the columns 2 and 2 at a predetermined interval without loosening. I have. The fibrous material 16 is made of a material that is easily compressed and deformed (for example, rock wool or glass wool) and acts as a space in which the membrane material 4 vibrates, so that it does not hinder the vibration of the membrane material 4. Membrane material 4
Is provided on one surface of the stud 2 as described above, but may be provided on both surfaces.

In the second embodiment, the spacer 11 is
In the third embodiment, the fibrous material 16 is provided on the upper surface of the membrane material 4. However, the fibrous material 16 has a thickness of about 3 to 8 mm, and is light in weight. Only needs to be fixed to the stud 2 with the tucker 17 or the like, and the construction is easy.

Further, since the membrane material 4 and the fibrous material 16 may or may not adhere to each other, the same effect is exhibited even if they are not adhered. Material 18 can be used. This integrated sound absorbing material 1
The use of 8 can simplify the construction process. Moreover,
The fibrous material 16 not only secures a space for the membrane material 4 as described above, but also functions as a cushioning material. In other words, the gypsum board vibrates due to the sound, and the vibration
It also has the effect of preventing it from being transmitted.

FIG. 4 shows a fourth embodiment. Unlike the first to third embodiments, the partition wall 20 has a membrane material 4 and a fibrous material between staggered columns 2, 2,. 16
This is characterized in that the sound absorbing material 18 having an integral structure with the above is attached, and rock wools 21 and 22 are provided on both surfaces of the sound absorbing material 18. Although not shown, a configuration in which the rock wool 21 is provided only on one surface of the sound absorbing material 18 may be employed, or the membrane material 4 and the fibrous material 16 may simply contact each other without being integrated. You may do so.

With such a configuration, the third embodiment
In the same manner as described above, the fibrous material 16 not only secures a space for the membrane material 4 but also functions as a cushioning material.

In the above embodiments 2 to 4, the film material 4 is
Although it is fixed in a state where it is not loosened, it may be fixed so as to be able to vibrate in a state where it is loosened. In that case, it is possible to loosen less than 10% with respect to the stud spacing to be fixed as in the first embodiment. desirable. The gypsum boards 6 and 7 have a thickness of 12.5.
mm and 15 mm may be used.

Next, a specific embodiment of the present invention will be described. FIGS. 5 to 7 are explanatory sectional views showing Examples 1 to 3,
FIG. 8 is a cross-sectional view for explaining Comparative Example 1, and FIG.
FIG. 10 is a table showing the configuration of the sound insulating walls according to Comparative Example 3 and Comparative Examples 1 and 2, and the sound insulating performance thereof. FIG. 10 is a graph showing the measurement results of the sound transmission loss of each of the examples.

FIG. 5 shows the partition wall 30 of the first embodiment. This partition wall 30 has studs 2, 2 having a thickness of 75 mm, a width of 50 mm, and a depth of 75 mm staggered with respect to a runner having a width of 100 mm in a staggered manner. Density 40 so that the tip protrudes
Rock wool 3 of Kg / m ³ and a thickness of 55 t is filled.

A density of 4 g / m of asphalt mixed with iron powder between the protruding studs 2 on the one sound source room side.
³ , the tucker 5 without loosening the 1.4 t thick film material 4
At a density of 0.8 g / m ³ with a spacer 11 having a thickness of 5 mm interposed on the upper surface thereof.
The plaster boards 6 and 7 of t are attached with screws 8. Further, gypsum boards 6 and 7 having the same configuration are stuck with screws 8 between the studs 2 and 2 on the other sound receiving chamber side. The stud spacing to be fixed is desirably about 455 mm.

FIG. 6 shows a partition wall 33 according to the second embodiment, which is different from the third embodiment in that the film material 4 is provided on both surfaces of the pillars 2 and 2, and the other structures are the same. Therefore, the description is omitted.

FIG. 7 shows a partition wall 36 of the third embodiment. The structure of the film material 4 is different from that of the first embodiment. In other words, the film material 4 has a density of 4 g / m ³ and a thickness of 2.4 t obtained by mixing asphalt with iron powder, and has a density of 80 Kg / m ³ and a thickness of 5 t on the upper surface, for example, glass. There is a feature in a sound absorbing material 18 in which a fibrous material 16 made of a nonwoven fabric of fibers is integrated. It should be noted that a configuration in which the fibrous material 16 is simply provided on the upper surface of the membrane material 4 may be employed instead of the integral configuration. The other configuration is the same, and the description is omitted.

FIG. 8 shows a partition wall 38 of Comparative Example 1, in which the membrane material 4 and the fibrous material 16 shown in Examples 1 to 3 are omitted. Although not shown, Comparative Example 2 is different from Comparative Example 1 in that a film material 4 having a density of 4 g / m ³ and a thickness of 1.4 t is provided between the studs 2 and 2 without loosening. The film material 4 and the gypsum board 6 are in a contact state.

FIG. 9 shows the structure of the sound insulating wall according to Examples 1 to 3 and Comparative Examples 1 and 2, and the sound insulating performance thereof.

On the other hand, Examples 1 to 3 and Comparative Examples 1 and 2
FIG. 10 shows the measurement results of the sound transmission loss of the sample. The evaluation of the sound insulation performance was evaluated by a sound insulation reference curve (D curve) defined by JIS A1419 and the Architectural Institute of Japan. Since this reference curve has an interval of 5 db, a D line that can be displayed at 1 db was used.

In the above-mentioned JP-A-11-247321 "Sound insulation wall structure", the sound insulation performance was determined in the coincidence frequency range.
This is because the wall structure is as thin as 5t. Since a wall or the like is required to have a performance of D40 or more, the thickness of the gypsum board needs to be about 25 t or more. When the wall thickness is 25 t or more or when a sound absorbing material is put in the hollow layer, the drop in coincidence is reduced, and the sound insulation performance is 1
It is often determined by 25 Hz.

The above Examples 1 to 3 and Comparative Example 1 each have a wall thickness of 25 t or more and are filled with a rock wool sound absorbing material, so that the sound insulation performance is determined at 125 Hz. The sound insulation performance of Comparative Example 1 was D44 as shown in the figure, but in Comparative Example 2 in which only the film material 4 was provided as in the prior art, the sound insulation performance was improved only by the weight law and was D45. However, Example 1
Then, it improved to D48. As described above, in the calculation based on the weight law, only 1 dB is improved, but 4.1 dB is improved. In Examples 2 and 3, the calculated value of the weight rule was improved three times.

[0042]

The sound insulation wall structure of the present invention can convert sound energy to vibration energy by vibrating the film material by providing the film material inside the wall structure so as to be able to vibrate in a relaxed state. In addition, the sound insulation performance is improved by increasing the weight of the film material, and the sound transmission to the sound receiving room can be suppressed by both the sound insulation performances.

Further, by interposing a spacer between the film material and the stud, or by attaching the film material and the fibrous material in an integrated structure, the film material can vibrate, and the sound insulation performance can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing Embodiment 1 of the present invention.

FIG. 2 is an explanatory sectional view showing Embodiment 2;

FIG. 3 is a sectional explanatory view showing the third embodiment.

FIG. 4 is an explanatory sectional view showing the fourth embodiment.

FIG. 5 is an explanatory sectional view showing the first embodiment of the present invention.

FIG. 6 is an explanatory sectional view showing the second embodiment.

FIG. 7 is a sectional explanatory view showing the third embodiment.

FIG. 8 is an explanatory sectional view showing the comparative example 1.

FIG. 9 is a table showing configurations of sound insulation walls according to Examples 1 to 3 and Comparative Examples 1 and 2, and their sound insulation performance and the like.

FIG. 10 is a graph showing the measurement results of the sound transmission loss of each example.

[Explanation of symbols]

 4 Membrane material 6,7 Plaster board

Claims (5)

[Claims] 1. A sound-insulating wall structure having a film material between inorganic molding plates such as gypsum board, characterized in that the film material having an area density of ² to 10 kg / m ² is attached so as to be vibrated in a loosened state. Sound insulation wall structure. 2. The material of the membrane is 3 to 3 with respect to the fixed interval.
The sound insulation wall structure according to claim 1, wherein the sound insulation wall structure is attached so as to be able to vibrate in a state of being slackened by 15%. 3. A sound insulating wall structure, wherein a spacer is arranged between a film material and an inorganic molding plate, and a space is provided between the film material and the inorganic molding plate. 4. The sound insulation wall structure according to claim 1, wherein the film material is composed of a fibrous sheet and / or a viscoelastic sheet. 5. The fixing distance of the film material is 300 mm.
The sound insulating wall structure according to claim 1, 2, 3, or 4, wherein: