JP3045927B2 - Soundproof support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure capable of preventing noises such as toilet noises.

[0002]

2. Description of the Related Art In recent years, especially in buildings such as dwellings, since the sound insulation performance from the outside has been improved, dwellings are less affected by external noise and are quiet. For this reason, the noise generated in the house, which has been inconspicuous in the past, is often pointed out as annoying noise. Examples of such house noises include, in particular, plumbing noise and toilet noise. In particular, it has been pointed out that such noise in houses around water in apartment buildings.
For example, a urine sound of a boy is very easy to be transmitted downstairs.
In a multi-family house or the like, a Western-style toilet is often installed, and for this reason, in general, boys fly urine toward a puddle portion of the toilet. However, when urine collides with the puddle, the toilet vibrates, and this vibration propagates to the floorboard,
The sound propagating downstairs from the floorboard is perceived as unpleasant noise. Therefore, it is required to reduce such unpleasant noises particularly generated around water to a level that does not matter.

[0003] Conventionally, when installing a toilet, the toilet was directly attached to the floor of a building. However, since the above-mentioned problems have arisen, a method has been developed in which a rubber plate is interposed between the toilet and the body of the building for construction. Also, for example, a method of dispersing and mixing plywood and rubber powder or fiber, manufacturing an anti-vibration plate obtained by solidifying the mixture, and interposing the anti-vibration plate between a floor surface and a toilet bowl and constructing the method. ,It has been developed.

[0004]

In each of these methods, an anti-vibration plate is installed on a floor plate, and a toilet bowl is installed thereon. However, the toilet bowl is formed of pottery, and the contact portion of the toilet bowl with the floorboard is, as is well known, formed of an elongated flange-like edge surface, and the flange portion is formed in a ring shape as a whole, The inside of the flange portion is hollow, through which a drain pipe passes. The anti-vibration plate is installed over the entire floor surface, and a flange portion is mounted on a very small portion of the anti-vibration plate.

[0005] Therefore, when installing the vibration-preventing plate on the floorboard, first, when finishing the floor surface, the entire floor surface of the toilet is finished in consideration of the thickness of the vibration-preventing plate. Processing was necessary. In particular, if the thickness of the vibration prevention plate is small, the vibration prevention effect becomes poor, so the thickness of the vibration prevention plate needs to be considerably increased. However, when the thickness of the anti-vibration plate is increased in this way, the processing thickness of the floor surface for securing the installation portion of the anti-vibration plate increases,
In addition, since this processing needs to be performed on the entire floorboard, the construction cost is increased. In addition, it is necessary to drill a through hole in the vibration prevention plate at the site, pass a drain pipe through the through hole, and then install the toilet bowl on the plate. For this reason, a step of providing a through-hole in the vibration prevention plate and a step of passing a drain pipe or the like through the through-hole are additionally required.
The number of construction processes on site increases, which takes time.

Further, from the viewpoint of the vibration prevention effect, the contact area between the toilet and the vibration prevention plate is small, and the vibration prevention plate has a large area. Even so, the displacement of the vibration preventing plate was extremely small, so that the soundproofing effect could hardly be expected.

SUMMARY OF THE INVENTION An object of the present invention is to provide a support structure such as a toilet bowl, which can significantly reduce noise generated by impinging a liquid on a liquid surface. Also,
An object of the present invention is to make it possible to easily implement such a support structure.

[0008]

According to the present invention, there is provided a support structure for supporting a sounding body on a floor, wherein a continuous flange surface is formed below the sounding body. The elongated support member is adhered to the adhesive layer along the
The support member supports the sounding body, and the support member includes a first layer that is relatively easily deformed by a compressive stress, and a second layer that is relatively hard to be deformed. % Compressive stress is 10 kgf / cm ² or less;
The amount of displacement when a load of 3 kgf / cm ² is applied is 5 mm
The present invention relates to a soundproof support structure characterized by the following. Further, the present invention is a support structure for supporting a sounding body on a floor surface, wherein a continuous flange surface is formed below the sounding body, and an elongated support member is formed along the flange surface. Adhered by the adhesive layer, the sounding body is supported by this support member, the support member,
A plurality of air chambers that are relatively easily deformed by compressive stress,
It is composed of a crosslinked viscoelastic material layer that is relatively difficult to deform, and when the support member is viewed in a longitudinal section, the crosslinked viscoelastic material layer has a plurality of comb-shaped protrusions, Each of the air chambers is formed between the parts, and the 25% compressive stress is 10 k.
gf / cm ² or less, and a displacement amount when a load of 3 kgf / cm ² is applied is 5 mm or less.

[0009]

The present inventor has repeatedly studied to reduce the noise mainly caused by the collision of urine with the puddle. As a result, it is extremely effective to adopt a support structure satisfying the following conditions. This has led to the present invention.

First, the inventor measured the frequency distribution of noise radiated from the floor plate below the toilet downstairs when urine collides with the toilet. The graph of “Comparative Example 1” in the graph of FIG. 6 shows the measurement results. As can be seen from the measurement results, the noise at the frequency of 250 Hz to 500 Hz is significantly larger than the noise at other frequencies, and therefore, the point is a method of reducing the noise in this range. The inventor repeated many experiments,
It has been found that in order to prevent noise within this range, it is necessary to reduce the compressive stress of the elastic body for preventing vibration.

That is, depending on the conventional vibration preventing plate, even if the water surface in the toilet bowl vibrates, the vibration preventing plate is
Because it is much larger than the contact part with the toilet, it is impossible to reduce the compressive stress of the vibration prevention plate, and no matter what material is used, it is not possible to effectively prevent noise. could not. For this reason, the present inventor closely adheres the elongated support member along the curved flange surface of the toilet,
The toilet was supported by this support member. In this case, the compressive stress of the support member is reduced by appropriately selecting the material of the support member from soft materials or by forming a layer which is easily deformed as described later. Could be reduced to an effective level.

The use of such an elongated string-shaped support member has made it possible to reduce and control its compressive stress. After this, the support member 25
It was confirmed that by setting the% compressive stress to 10 kgf / cm ² or less, noise can be significantly reduced, for example, as shown in the graph of “Experimental example” in FIG. In addition to the toilet, the above-mentioned effects were confirmed for applications that generate noise when the liquid collides with the liquid surface, for example, bathrooms and kitchen sinks.

Further, since the support member is provided only along the lower flange portion of the sounding body such as a toilet, when the floor surface is finished, only the support member is provided at the installation portion of the support member. It is only necessary to perform a finishing process for forming a groove for accommodating the floor, and it is not necessary to perform such a process on the entire floor surface as in the related art. Moreover, since the support member is provided only along the lower flange portion of the sounding body, there is no need to perform a step of drilling a through hole in the vibration preventing plate on site. For the above reasons, the construction work on site is not required, and the number of construction steps is reduced.

[0014]

However, if the amount of compressive deformation of the support member is too large, the support member is likely to be subjected to permanent compression set.
Preferably, the 5% compressive stress is 1 kgf / cm ² or more. In addition, a certain degree of compressive stress is always applied to the support member, and when a user or the like rides, if the displacement of the support member is large, an uncomfortable feeling is generated. Therefore, when a load of 3 kgf / cm ² is applied to the support member, the displacement amount is 5
mm or less.

Further, when disposing the support member along the flange surface, if the flange surface is curved, it is difficult to dispose the support member on site. In particular, the flange surface of the toilet bowl has a large curvature, a curvature radius of 5 cm or more, and a curved line having an angle of 60 ° or more, and it is necessary to make the supporting member follow these. Therefore, by repeatedly forming the cutouts on the side surfaces of the support member, it is easy to greatly curve the support member during construction. In addition, from this viewpoint, it is further preferable that a plurality of cut lines are further provided on the side surface of the support member.

In the case where the pressure-sensitive adhesive layer is provided on at least one surface of the support member, particularly, for example, when the support member is applied to the flange surface of the toilet, the release paper of the pressure-sensitive adhesive layer is peeled off. It is only necessary to attach the support member to the flange surface, and the construction is extremely easy.

The width of the supporting member is preferably set to 20 mm to 50 mm. Further, the support member may be made of a single material as a whole, or may be made of a plurality of materials. If the whole support member is made of a single material,
Although the support member is easy to produce, the material that can achieve the above-described compression ability is limited. When the supporting member is made of a plurality of materials, it is easy to adjust the compressive stress.

In the case where the supporting member has the first layer which is relatively easily deformed by the compressive stress and the second layer which is relatively hard to deform, the first layer is used for the very small vibration. The layer can prevent vibration and noise, and when a large compressive stress is applied, the second layer can prevent excessive displacement.

From this viewpoint, it is particularly preferable that the support member is composed of a crosslinked viscoelastic layer and an air chamber. This is because the air chamber is hollow, which is particularly effective in reducing minute vibrations, and has a particularly large capacity in terms of absorbing vibrations and preventing sound. Moreover, when the air chamber is deformed to some extent and its volume is reduced, excessive displacement is not caused by the crosslinked viscoelastic layer.

Further, by providing a large number of protrusions and recesses on the contact surface side of the support member with the floor surface, the 25% compressive stress can be further reduced, and the soundproof performance can be further improved.
In addition, as a specific material of the support member, any material having viscoelasticity can be basically used without any particular limitation. Its hardness is 45 or less as measured by a JIS A type hardness meter. Is preferred. In addition, as a form of each layer constituting the support member, in addition to a bulk layer made of a rubber material, each vibration damping material in the form of a film, a net, a fiber, or a foam can be used.

Hereinafter, the present invention will be described in more detail with reference to the drawings. FIGS. 1A and 1B are plan views each showing a support member according to an embodiment of the present invention. FIG.
The support member 1 shown in FIG.
One side surface 1a of the support member 1 is a substantially flat surface. On the other side surface 1b, a projection 3A having a substantially triangular shape in plan view is provided.
Are repeatedly provided at a predetermined pitch in the length direction of the support member 1. Between the projections 3A, a plurality of cutouts 4A having a substantially triangular shape also in a plan view are repeatedly provided at a predetermined pitch in the length direction of the support member 1.

On the side surface 1a, a plurality of cut lines 2 are provided repeatedly at a predetermined pitch in the longitudinal direction of the support member 1. When the support member 1 is constructed along the curved flange surface, the support member can be easily bent at these cutouts 4A. However, if the support member is bent at the notch 4A, the strain naturally concentrates on the side surface 1a in the region where the protrusion 3A exists. It is effective to form a large number of cut lines 2 on the side surface 1a opposite to the cutout portion 4A from the viewpoint of releasing distortion. In particular, since this distortion is concentrated on the back side of each projection 3A, each of the cut lines 2 is
May be formed at a position facing each projection 3A,
It is valid. An adhesive layer (not shown) is formed on the adhesive surface 10A side of the support member 1.

The support member 11 shown in FIG. 1 (b) also has an elongated cord shape, and one side surface 11a of the support member 11 is substantially flat. On the other side surface 11b, fold-like projections 3B are provided repeatedly at a predetermined pitch in the longitudinal direction of the support member 11 when viewed in plan. Each projection 3B
Have a substantially semicircular shape at their ends. Notches 4B are provided between the protrusions 3B repeatedly at a predetermined pitch in the length direction of the support member 11. Side 1
On the 1a side, a number of cut lines 2 are repeatedly provided at a predetermined pitch in the length direction of the support member 11,
Each cut line 2 is formed at a position facing each projection 3B on the side surface 11a. Adhesive surface 1 of support member 11
An adhesive layer (not shown) is formed on the 0B side.

For example, as shown in FIGS. 1 (a) and 1 (b), the structure of the support member in the thickness direction of the present invention may be a single layer as described above. However, the support member has a first layer that is relatively easily deformed by compressive stress,
A second layer that is relatively hard to deform can be provided. FIGS. 2A and 2B are cross-sectional views illustrating the cross-sectional shape in the thickness direction of the support member having such a configuration.

In the supporting member shown in FIG. 2A, a vibration absorbing layer 30 is provided below the viscoelastic layer 9, and the vibration absorbing layer 30 is formed of the viscoelastic layer 7 and the air chamber. 8. Each viscoelastic layer 7 and air chamber 8
Has a shape in which irregularities are repeated, and are intertwined with each other. An adhesive layer 6 is formed below the vibration absorbing layer 30, and the release paper 5 is attached to the adhesive layer 6. When installing this support member, the release paper 5 is peeled off, and the adhesive surface 10C is attached to the flange surface.
14A is a contact surface of the support member to the floor plate.

In the supporting member shown in FIG. 2 (b), two viscoelastic layers 12A and 12B are provided as a second layer, and between these viscoelastic layers 12A and 12B,
The first layer 13 is sandwiched. The first layer 13 is preferably formed by, for example, a sponge. An adhesive layer 6 is formed below the lower viscoelastic body layer 12B, and the release paper 5 adheres to the adhesive layer 6. At the time of construction, the release paper 5 is peeled off, and the adhesive surface 10D is attached to the flange surface. 14B is a contact surface of the support member to the floor plate.

FIG. 3A is a plan view showing a part of a support member 1A according to another embodiment, and FIG. 3B is a perspective view showing a part of the support member 1A. This support member 1A
Has an elongated string shape, and one side surface 1a of the support member 1A is a substantially flat surface. On the other side surface 1b, a plurality of projections 3A having a substantially triangular shape in a plan view are repeatedly provided at a predetermined pitch in the length direction of the support member 1, and a cut is formed between the projections 3A. A plurality of notches 4A are repeatedly provided at a predetermined pitch.

Adhesive surface of support member 1A (not shown)
Is a plane. Contact surface 14 of support member 1A with floor plate
C has a pair of substantially rectangular projections 17A and 17B, respectively.
Extend in the length direction of the support member 1A.
An elongated groove 1 is provided outside each of the projections 17A and 17B.
8A and 18C are formed, and each projection 17A and 17B is formed.
An elongated groove 18B is also formed between them. Each groove 1
8A, 18B and 18C extend in the length direction of the support member 1A, respectively.

The projections 17A and 17B are provided with recesses 16 at regular intervals, respectively.
Are continuous with the grooves 18A and 18C at both ends, respectively, and are continuous with the center groove 18B. As a result, each projection has a substantially rectangular shape in plan view.

FIG. 4 is a plan view schematically showing a state in which the support member 1 of the present invention is adhered to the lower flange surface 15 of the toilet. The flange surface 15 has two corners 15
a and a curved portion 15b. The support member 1 is attached to the flange surface 15 with the notches 4A of the support member 1 facing inward.

Hereinafter, more specific experimental results will be described. The construction was performed according to the following examples, and the noise grade and the like were measured. (Embodiment 1) The planar shape shown in FIG.
A support member having the cross-sectional shape shown in FIG. However, the viscoelastic layers 12A and 12B, which are the second layers, are made of EPT solid rubber having a thickness of 1.5 mm.
3 was an EPT foam having a thickness of 3 mm, and these three layers were simultaneously vulcanized and formed. The adhesive layer 6 and the release paper 5 were attached to this. The following compounds were used as materials for these layers.

[0032]

(Table 1) EPT solid rubber constituting the viscoelastic layers 12A and 12B EPT 100 parts by weight Carbon black SRF 50 parts by weight Carbon black FT 37.5 parts by weight Carbon black FEF 25 parts by weight Stearic acid 1 part by weight Process oil 45 parts by weight Zinc white 10 parts by weight Vulcanization accelerator CM 1.3 parts by weight Vulcanization accelerator PX 0.9 parts by weight Sulfur 0.9 parts by weight Total 271.6 parts by weight

[0033]

(Table 2) (Sponge rubber constituting foam layer 13) EPT 100 parts by weight Carbon black SRF 50 parts by weight Carbon black FEF 65 parts by weight Stearic acid 2.5 parts by weight Process oil 45 parts by weight Zinc flower 3 10 parts by weight Talc 50 parts by weight Polyethylene glycol $ 4000 0.7 parts by weight Foam 2.0 parts by weight Paraffin wax 0.8 parts by weight Total 326.0 parts by weight

The thickness of the support member thus manufactured was measured with a dial gauge, and the measured values are shown in Table 6 in mm. In addition, when the thickness of the support member was compressed by 25% from the initial thickness, the 25% compressive stress was measured. Further, the amount of displacement when a load of 3 kgf / cm ² was applied by a compression tester was read and shown in Table 6.
Further, the release paper of the supporting member is peeled off, and the toilet bowl 2 shown in FIG.
The support member was attached to the second flange surface 15, and then the toilet 22 was placed on the floor plate 26. The work time required to carry out these series of steps was measured, and when the work time exceeded 10 minutes, “×” was displayed in the item of “work time” in Table 6 and it was within 10 minutes. In this case, "O" was displayed in the item of "working time".

After the toilet 22 was installed, the microphone 23 was installed under the floor plate 26, and the microphone 23 was connected to the frequency analyzer 24 and the sound level meter 25. The water in the water injection tank 21 was dropped 1.8 liters from the height of 1 m onto the surface of the toilet 22, and the N class of the noise was measured. Further, 250H was applied to Comparative Example 1 (blank) described later.
Measure the amount of improvement in noise (dB) at z and 500 Hz,
The results are shown in Table 6.

Example 2 A support member having the shape shown in FIG. 3 was prepared. The thickness of the support member was 18 mm, the thickness of each of the projections 17A and 17B was 3 mm, the depth of the groove 16 was 5 mm, and the width was 3 mm. This support member was constructed in the same manner as in Example 1, and the same measurement as in Example 1 was performed.
Table 6 shows the results. However, the following formulation was used.

[0037]

Table 3 Chloroprene rubber 100 parts by weight Carbon black FEF 50 parts by weight Light calcium carbide 50 parts by weight Dioctyl phthalate 15 parts by weight Stearic acid 1 part by weight Crosab 4.5 parts by weight Vaseline 2 parts by weight Zinc flower 3 3 parts by weight Magnesium oxide 1.5 parts by weight Vulcanization accelerator NA22 1 part by weight Vulcanization accelerator TT 0.5 part by weight Total 228.5 parts by weight

Example 3 A support member having a planar shape shown in FIG. 1A and a sectional shape shown in FIG. 2A was prepared. This support member was constructed in the same manner as in Example 1,
The same measurement as in Example 1 was performed, and the results are shown in Table 6. However, the following formulation was used.

[0039]

TABLE 4 Liquid polybutadiene 90 parts by weight Straight asphalt 60/80 120 parts by weight Process oil 100 parts by weight Calcium carbonate 40 parts by weight Antioxidant 5.1 parts by weight Curing agent 23 parts by weight

(Experimental Example) A support member having a planar shape shown in FIG. 1A and having a thickness of 10 mm and consisting of a single layer was prepared. This support member was constructed in the same manner as in Example 1, and the same measurements as in Example 1 were performed. The results are shown in Table 6. However, the following formulation was used.

[0041]

TABLE 5 Liquid polybutadiene 90 parts by weight Straight asphalt 60/80 150 parts by weight Process oil 60 parts by weight Calcium carbonate 50 parts by weight Antioxidant 5 parts by weight Foam stabilizer 0.1 parts by weight Catalyst 1 part by weight Water 3.2 parts by weight Parts curing agent 74 parts by weight

(Comparative Example 1) The same measurement as in Example 1 was performed without performing the soundproofing treatment of the toilet, and the results are shown in Table 6.
This noise value was adopted as a comparative value (blank).

Comparative Example 2 Powder rubber and nylon cord waste were compressed and attached to a plywood having a thickness of 12 mm.
An anti-vibration layer of 2 mm was formed. The obtained vibration preventing plate was set on concrete, a through hole was drilled in the vibration preventing plate, a toilet 22 was set on the vibration preventing plate, and a drain pipe was passed through the through hole. The same measurement as in Example 1 was performed, and the results are shown in Table 6.

[0044]

[Table 6]

In the first embodiment, the noise class is N─28
Therefore, it is considerably improved, and there is no uncomfortable feeling when sitting on the toilet 22 and 250 Hz and 500 H
As a result of greatly improving the noise at z, even when careful in the bedroom at night, the water sound was hardly evident.

In the second embodiment, the noise class is N─30
Therefore, it is considerably improved, and there is no uncomfortable feeling when sitting on the toilet 22 and 250 Hz and 500 H
As a result of greatly improving the noise at z, even when careful in the bedroom at night, the water sound was hardly evident. The degree of noise reduction was almost the same as in the first embodiment.

In the third embodiment, the noise class is N─25
Therefore, it is considerably improved, and there is no uncomfortable feeling when sitting on the toilet 22 and 250 Hz and 500 H
As a result of greatly improving the noise at z, even when careful in the bedroom at night, the water sound was hardly evident. Further, the degree of noise reduction is even greater than in the first and second embodiments.

In the experimental example, the noise class is N─24, which is considerably improved, so that there is no uncomfortable feeling even when sitting on the toilet 22 and the frequency is 250 Hz and 500 Hz.
As a result, the noise of the water was hardly evident even when the caution was taken in the bedroom at night.

In Comparative Example 1, the noise class was N─55.
In particular, the noise at 250 Hz and 500 Hz is large. To illustrate this point, FIG. 6 further shows the frequency distribution of the noise level of each of the comparative example 1 and the experimental example. As described above, the noise reduction amount is particularly large at 250 to 500 Hz.

In Comparative Example 2, the noise class was N─45
The noise at 250 Hz and 500 Hz is slightly improved as compared with the situation of Comparative Example 1 (before processing). However, the degree of the improvement is small and inadequate as compared with the examples of the present invention. Especially when I heard it in the bedroom at night, I could clearly see the sound of urine. In addition, the number of work steps was large, and the work time was long.

Further, supporting members having various structures are prepared, and
The noise rating was measured by the same measurement method as in Example 1 with various changes in the 5% compressive stress. For each construction example, the relationship between the 25% compressive stress of the support
As shown in FIG. As can be seen from this graph, by setting the 25% compressive stress to 10 kgf / cm ² or less, the soundproofing performance against water noise generated in the toilet was sharply improved.

[0052]

As described above, according to the present invention, it is possible to remarkably reduce the noise generated when a liquid collides with a liquid surface such as a toilet. In addition, construction of such a support structure can be easily performed in a short time.

[Brief description of the drawings]

FIG. 1A is a plan view schematically showing a support member 1 used in the present invention, and FIG. 1B is a plan view schematically showing another support member 11. FIG.

FIG. 2A is a cross-sectional view schematically illustrating a preferred example of a sectional shape of a support member used in the present invention, and FIG. 2B is a schematic view illustrating a preferred example of a sectional shape of another support member. It is sectional drawing shown in FIG.

FIG. 3A is a plan view schematically showing still another supporting member, and FIG. 3B is a cutaway perspective view schematically showing the supporting member of FIG.

FIG. 4 is a plan view schematically showing a state where the support member 1 is attached to the flange surface 15 of the toilet.

FIG. 5 is a schematic diagram showing an apparatus for measuring noise caused by water noise in a toilet.

FIG. 6 is a graph showing a noise level frequency distribution according to an experimental example and a comparative example 1.

FIG. 7 is a graph showing a relationship between a 25% compressive stress of a support member and a noise class.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A, 11 Support member 1a, 1b, 11a, 11b Side 2 Cut line 3A, 3B Side projection 4A, 4B Side notch 5 Release paper 6 Adhesive layer 7 Viscoelastic layer 8 Air chamber 10A 10B, 10C, 10D Adhesive surface 12A, 12B Second layer 013 First layer 15 Flange surface of toilet bowl 15a, 15b Curved or bent portion of flange surface 21 Water injection tank 22 Toilet bowl 23 Microphone 24 Frequency analyzer 25 Sound level meter 26 floor board

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E03D 11/16 E04F 15/20 G10K 11/16

Claims (4)

(57) [Claims] 1. A support structure for supporting a sounding body on a floor surface, wherein a continuous flange surface is formed below the sounding body, and an elongated support member is adhered along the flange surface. The sounding body is supported by the support member, and the support member supports the sounding body, and the support member has a first layer relatively easily deformed by compressive stress and a second layer relatively hard to deform. And a 25% compressive stress of 10
kgf / cm ² or less, wherein the amount of displacement when a load of 3 kgf / cm ² is 5mm or less, soundproof support structure. 2. A support structure for supporting a sounding body on a floor surface, wherein a continuous flange surface is formed below the sounding body, and an elongated support member is adhered along the flange surface. The sounding body is supported by the support member, and the support member includes a plurality of air chambers that are relatively easily deformed by compressive stress, and a crosslinked viscoelastic body that is relatively hard to deform. When the support member is viewed in a longitudinal section, the cross-linked viscoelastic layer has a plurality of comb-shaped protrusions, and the air chambers are formed between the protrusions. 25% compressive stress is 10kgf / cm
^{2. A} soundproof support structure, wherein the displacement amount when a load of 3 kgf / cm ² is applied is 5 mm or less. 3. The soundproof support structure according to claim 1, wherein the flange surface is bent, and a cutout portion is repeatedly formed on a side surface of the support member. 4. The soundproof support structure according to claim 1, wherein the support member has a plurality of protrusions and a plurality of recesses on the flange surface side. .