Sound insulation structure

Abstract

To provide a sound insulation structure capable of improving sound insulation performance.SOLUTION: A sound insulation structure includes: a floor material 12 supported by support legs 11 on a floor slab 2 with a first space R1 between the floor material 12 and the floor slab; and a wall material 22 arranged with a second space R2 between the wall material 22 and a partition wall 3 rising from the floor slab 2. The first space R1 and the second space R2 are mutually connected.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sound insulating structure for floors and walls. [Background technology]

[0002] Conventionally, structures capable of blocking impact sounds generated on floors and walls are known, such as that described in Patent Document 1.

[0003] Patent Document 1 describes a soundproofing structure that includes a dry floating floor (double floor) in which a floor base is supported by support legs on a concrete slab. In the soundproofing structure, a space under the floor is formed between the concrete slab and the floor base.

[0004] In the soundproofing structure described in the above Patent Document 1, the underfloor space is surrounded by walls. Therefore, the vibration caused by the floor impact sound is amplified by the effect of the air spring in the underfloor space, and there is a risk that the sound will be transmitted from the upper floor to the lower floor. For this reason, a soundproofing structure that can reduce the effect of the air spring and improve the sound insulation performance is desired. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-324205 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a sound insulation structure capable of improving sound insulation performance. [Means for solving the problem]

[0007] The problem to be solved by the present invention has been described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, the system comprises a floor material supported by support legs on the floor slab with a first space between it and the floor slab, and a wall material arranged with a second space between it and a wall rising from the floor slab, and the first space and the second space are connected to each other.

[0009] In claim 2, a wall base is provided in the second space and to which the wall material is fixed, the end of the floor material is supported by the wall base, and a wall vibration-proof part is provided at the lower end of the wall base, which has vibration-proof properties and supports the wall base against the floor slab.

[0010] In claim 3, the support leg is provided with a floor vibration-isolating part having vibration-isolating properties, and the spring constant of the wall vibration-isolating part is formed to be larger than the spring constant of the floor vibration-isolating part.

[0011] In claim 4, the wall material is provided above the floor material. Effect of the Invention

[0012] The present invention has the effect of improving sound insulation performance. [Brief description of the drawings]

[0013] [Figure 1] 1 is a side cross-sectional view showing a sound insulation structure according to an embodiment of the present invention. [Diagram 2] A front view showing the wall base and vibration-proof part of a raised wall. [Diagram 3] (a) An enlarged cross-sectional side view showing the air flow when a floor material receives an impact. (b) An enlarged cross-sectional side view showing the air flow when airborne sound enters a wall material. [Figure 4] (a) A side cross-sectional view showing a conventional double floor. (b) A side cross-sectional view showing a double floor with a gap formed between it and the partition wall. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A sound insulation structure 1 according to one embodiment of the present invention will be described below.

[0015] The sound insulation structure 1 shown in Fig. 1 is provided in a building having floors and walls. First, the building in which the sound insulation structure 1 is provided will be described below. As the building, for example, an apartment building (tenement house, condominium, etc.) can be used.

[0016] The building includes a floor slab 2, which is a structural floor. The floor slab 2 may be, for example, a slab made of reinforced concrete or a composite slab. The building also includes a partition wall 3 rising from the floor slab 2. The partition wall 3 is a wall that separates the boundaries between each dwelling unit in the apartment building. The partition wall 3 is formed, for example, by providing a surface material in front of and behind a lightweight steel frame base (such as studs). Note that FIG. 1 shows the partition wall 3 in a schematic manner. The partition wall 3 is also arranged to surround all four sides of a double floor 10, which will be described later.

[0017] Next, we will explain the sound insulation structure 1. The sound insulation structure 1 is a structure that uses a double floor 10 that forms a space between it and a floor slab 2, and a false wall 20 that forms a space between it and a parting wall 3. The sound insulation structure 1 constitutes the interior space of the second floor or higher of a building.

[0018] The double floor (floor) 10 constitutes a double-structure floor together with a floor slab 2. The double floor 10 includes support legs 11 and a floor material 12.

[0019] The support legs 11 are disposed on the floor slab 2 and support the floor material 12 described below. A plurality of support legs 11 are disposed horizontally at predetermined intervals. A vibration-isolating section 11a made of a material having vibration-isolating properties is provided at the lower part of the support legs 11. The vibration-isolating section 11a is made of, for example, rubber. By providing the vibration-isolating section 11a, it is possible to suppress the transmission of vibrations from the floor material 12 described below to the floor slab 2.

[0020] The floor material 12 constitutes the floor of the indoor space. The floor material 12 is formed in a board shape with the board surface facing up and down. The floor material 12 is formed of a floor base made of a wood-based material such as plywood or particle board, and a finishing material such as a flooring material provided on the upper surface of the floor base.

[0021] As shown in FIG. 1, the floor material 12 is supported by support legs 11 and a false wall 20 described later, and is disposed with a predetermined space from the floor slab 2. More specifically, the end (wall side end) of the floor material 12 is supported by the false wall 20. A detailed explanation of the support of the end of the floor material 12 will be given later. The part of the floor material 12 excluding the end is supported by a plurality of support legs 11. Hereinafter, the space between the floor slab 2 and the floor material 12 is referred to as a "first space R1."

[0022] The false wall 20 shown in Figures 1 and 2 constitutes a double-wall structure together with the parting wall 3. In this embodiment, an example is shown in which the false wall 20 is provided in front of the parting wall 3. It is also possible to provide a false wall 20 behind the parting wall 3. When providing an electrical outlet or the like in the indoor space, the false wall 20 is attached to the false wall 20 instead of the parting wall 3, so that the electrical outlet or the like can be installed without affecting the sound insulation performance and fire resistance performance of the parting wall 3 itself. The false wall 20 comprises a wall base 21, a wall material 22, a vibration-proof section 23, and a support material 24.

[0023] The wall base 21 is a base for attaching a wall material 22 described later. The wall base 21 is disposed in front of the partition wall 3. The wall base 21 includes a stud 21a and a runner 21b.

[0024] 1 and 2 are members to which wall materials 22, described later, are attached. The studs 21a are formed in a shape that is long in the vertical direction. As the studs 21a, for example, studs made of light-gauge steel (LSG) can be used. As shown in FIG. 2, a plurality of the studs 21a are arranged at predetermined intervals in the horizontal direction.

[0025] The runners 21b are members attached to the upper and lower ends of the multiple partition walls 21a. In the illustrated example, the lower runner 21b is illustrated, and the upper runner 21b is omitted. The runners 21b are formed in a shape that is long in the left-right direction. As shown in FIG. 1, the runners 21b are formed in a cross-sectional shape that is roughly U-shaped (C-shaped) and opens upward. The lower ends of the partition walls 21a are provided in the openings of the runners 21b.

[0026] The wall material 22 constitutes the wall surface of the raised wall 20. The wall material 22 is fixed to the front surface of the wall base 21. The wall material 22 is formed of, for example, gypsum board. A finishing material such as wallpaper is provided on the front surface of the wall material 22. As shown in FIG. 1, the wall material 22 is fixed to the wall base 21 (partition stud 21a) and is disposed with a predetermined space from the partition wall 3. Hereinafter, the space between the partition wall 3 and the wall material 22 is referred to as a "second space R2". As shown in FIG. 1, the wall material 22 is disposed so as to be located above the floor material 12. A baseboard 4 is provided at the boundary between the wall material 22 and the floor material 12.

[0027] The vibration-isolating portion 23 has vibration-isolating properties and supports the wall base 21 against the floor slab 2. The vibration-isolating portion 23 is provided at the lower end of the wall base 21. More specifically, the vibration-isolating portion 23 is provided on the lower surface of the runner 21b. The lower surface of the vibration-isolating portion 23 abuts against the floor slab 2. The vibration-isolating portion 23 is formed of, for example, rubber. Moreover, the vibration-isolating portion 23 is formed of a material that is harder (has a larger spring constant) than the vibration-isolating portion 11a of the support leg 11. As shown in FIG. 2, a plurality of vibration-isolating portions 23 are arranged at predetermined intervals (for example, about 900 mm) in the length direction (left-right direction) of the runner 21b.

[0028] The receiving material 24 supports the end of the floor material 12. The receiving material 24 is formed in a shape that is long in the left-right direction. As shown in FIG. 1, the receiving material 24 is formed in a generally L-shape in cross section. The receiving material 24 is fixed to the front surface of the lower part of the partition 21a. The receiving material 24 is disposed at approximately the same height as the support leg 11.

[0029] In this embodiment, the end of the floor material 12 is placed on the upper surface of the support material 24, and the wall base 21 of the false wall 20 is used to support the end of the floor material 12. Also, in this embodiment, the end of the floor material 12 is arranged so as to be close to the front surface of the partition 21a. That is, in this embodiment, the floor material 12 is arranged so as not to form a gap between it and the false wall 20.

[0030] In the sound insulation structure 1 as described above, the first space R1 and the second space R2 are mutually connected. This improves the sound insulation performance compared to a conventional double floor in which the underfloor space (first space R1) is sealed. First, an example of a conventional double floor 10A will be described below with reference to FIG. 4. In the example shown in FIG. 4, a false wall 20 is not formed. In the following description of the double floor 10A, the same reference numerals are used for the same configuration as in the present invention for convenience, and the description will be omitted as appropriate.

[0031] In a conventional double floor 10A shown in Figures 4(a) and (b), the ends of the floor material 12 are supported by edge joists 5, which are long members in the horizontal direction (left-right direction). A vibration-isolating part 5a made of a material with vibration-isolating properties is provided at the bottom of the edge joists 5. As shown in the figure, a material with vibration-isolating properties can also be placed between the front surface of the parting wall 3 and the edge joists 5.

[0032] Fig. 4(a) shows an example in which the end of the floor material 12 is arranged close to the front surface of the partition wall 3. In this case, the first space R1, which is the space under the double floor 10A, is sealed. For this reason, for example, if the floor material 12 of the double floor 10 receives an impact, the vibration caused by the floor impact sound is amplified by the effect of the air spring in the first space R1, and there is a risk that the floor impact sound will be transmitted widely from the upper floor to the lower floor.

[0033] Therefore, as shown in the example of FIG. 4(b), it is possible to reduce the effect of the air spring by providing a gap S between the end of the flooring 12 and the partition wall 3 (baseboard 4) to allow the air in the first space R1 to escape. However, it is assumed that it is difficult to form the above-mentioned gap S in an attractive manner. It is also assumed that relatively large furniture and other items with a large weight are placed on the end side of the flooring 12. For this reason, the end of the flooring 12 may sink due to the weight of the furniture, etc., and the gap S may become larger, which may impair the appearance. In order to reduce the sinking of the end of the flooring 12, it is possible to form the vibration-proof part 5a of the edge joist 5 from a harder material (with a larger spring constant), but in this case, vibrations may be more easily transmitted from the upper floor to the lower floor.

[0034] On the other hand, according to the sound insulation structure 1 of this embodiment, a false wall 20 is provided, and the first space R1 formed by the double floor 10 and the second space R2 formed by the false wall 20 are connected to each other. With the above configuration, when the floor material 12 receives an impact as shown in Fig. 3(a), the air in the first space R1 can be released to the second space R2 on the false wall 20 side. This makes it possible to reduce the spring constant of the air spring in the first space R1, and to suppress the deterioration of the floor impact sound insulation performance of the double floor 10 due to the influence of the air spring.

[0035] Furthermore, according to this embodiment, the air in the first space can be released without forming a gap S (see FIG. 4(b)), so it is possible to avoid the gap S becoming larger due to sinking of the floor material 12, which would impair the appearance. Furthermore, since the gap S is not formed in this embodiment, the spring constant of the vibration-proof part 23 can be set smaller than the spring constant of a general vibration-proof part provided at the end of the floor material 12 (for example, the vibration-proof part 5a of the edge joist 5). This makes it possible to prevent the transmission of vibration from the end of the floor material 12 to the floor slab 2, and suppress a decrease in floor impact sound insulation performance.

[0036] In this embodiment, the wall base 21 of the false wall 20 is used to support the ends of the floor material 12. This eliminates the need to provide components (such as edge joists 5) for supporting the ends of the floor material 12, and allows for a reduction in the number of components.

[0037] Moreover, the sound insulation structure 1 can suppress the deterioration of sound insulation performance caused by the provision of the false wall 20. That is, in a typical false wall (not shown), the second space R2 is sealed because a wall base is placed on the floor material 12. Therefore, when airborne sound enters the wall material 22, there is a risk that the sound will be transmitted significantly due to the drumming phenomenon (resonance transmission phenomenon) in which vibrations are easily transmitted to the adjacent side across the partition wall 3 due to the influence of air springs. In this case, sounds of relatively low frequencies (for example, frequencies in the 125 Hz band) are particularly likely to be transmitted.

[0038] On the other hand, according to the sound insulation structure 1 of this embodiment, the first space R1 and the second space R2 are connected to each other, so that when airborne sound enters the wall material 22, the air in the second space R2 can escape to the first space R1 on the floor side, as shown in Fig. 3(b). This makes it possible to reduce the spring constant of the air spring in the second space R2, and to suppress the deterioration of the sound insulation performance of the false wall 20 due to the influence of the air spring. In this way, according to the sound insulation structure 1 of this embodiment, it is possible to solve both the factors that cause the deterioration of the sound insulation performance of the double floor 10 and the factors that cause the deterioration of the sound insulation performance of the false wall 20.

[0039] In addition, as shown in Figs. 1 and 2, in this embodiment, the sound insulation performance of the sound insulation structure 1 can be further improved by supporting the external wall 20 itself with the vibration-proofing parts 23. That is, when improving the sound insulation performance by vibration-proofing, it is desirable to set the natural frequency of the vibration-proofing parts 23 low. Here, the natural frequency of the vibration-proofing parts 23 (one vibration-proofing part 23) is determined by the load supported by the vibration-proofing part 23 and the spring constant of the vibration-proofing part 23. More specifically, when the load supported by the vibration-proofing part 23 is increased or the spring constant of the vibration-proofing part 23 is decreased, the natural frequency of the vibration-proofing part 23 can be decreased. The load supported by one vibration-proofing part 23 can be set by adjusting the number (pitch) of the vibration-proofing parts 23.

[0040] In this embodiment, the vibration-isolating part 23 supports the false wall 20 itself, thereby increasing the load supported by the vibration-isolating part 23. This allows the natural frequency of the vibration-isolating part 23 to be relatively small, and thus improves sound insulation performance. Furthermore, by increasing the load supported by the vibration-isolating part 23 as described above, the natural frequency of the vibration-isolating part 23 can be reduced even if the spring constant of the vibration-isolating part 23 is set to a relatively large value. This allows the sound insulation performance to be improved while reducing the displacement of the vibration-isolating part 23 due to the load (sinking of the ends of the false wall 20 and floor material 12).

[0041] In addition, as described above, by reducing the natural frequency of the vibration isolation section 23, it is possible to suppress the solid-borne sound generated on the false wall 20 side from being transmitted to the floor slab 2 side (the floor below). Specifically, when the tip of a vacuum cleaner or the like hits the wall material 22, there is a possibility that the solid-borne sound will be transmitted to the floor below via the floor slab 2, but as described above, by reducing the natural frequency of the vibration isolation section 23 between the false wall 20 and the floor slab 2, it is possible to suppress the transmission of the solid-borne sound to the floor below.

[0042] As described above, the sound insulation structure 1 according to one embodiment of the present invention has the following features: A floor material 12 supported by a support leg 11 on the floor slab 2 with a first space R1 between the floor slab and the floor material 12; A wall material 22 is arranged with a second space R2 between it and a partition wall 3 (wall) rising from the floor slab 2; Equipped with The first space R1 and the second space R2 are in communication with each other.

[0043] This configuration can improve the sound insulation performance. That is, when the floor material 12 receives an impact, the air in the first space R1 of the double floor 10 can be released to the second space R2 of the false wall 20. This can reduce the spring constant of the air spring in the first space R1, and can suppress the deterioration of the floor impact sound insulation performance due to the influence of the air spring. In addition, according to this embodiment, the deterioration of the impact sound insulation performance can be suppressed without forming a gap for air escape between the wall material 22 and the floor material 12. In addition, when airborne sound enters the wall material 22, the air in the second space R2 can be released to the first space R1. This can suppress the deterioration of the sound insulation performance due to the influence of the air spring in the second space R2.

[0044] In addition, sound insulation structure 1 is A wall base 21 is provided in the second space R2 and to which the wall material 22 is fixed. The ends of the floor material 12 are supported by the wall base 21. At the lower end of the wall base 21, a vibration-isolating section 23 (wall vibration-isolating section) that has vibration-isolating properties and supports the wall base 21 against the floor slab 2 is provided.

[0045] With this configuration, by using the wall base 21 to support the ends of the floor material 12, it is possible to omit the members (edge ​​joists) that support the ends of the floor material 12, thereby reducing the number of members. In addition, by providing the vibration-proof section 23, it is possible to suppress the transmission of sound generated in the floor material 12 and the wall material 22 to the floor slab 2.

[0046] In addition, in this embodiment, the external wall 20 itself is supported by the vibration-proofing portion 23, which can further improve the sound insulation performance of the sound insulation structure 1. In other words, by increasing the load supported by the vibration-proofing portion 23, the natural frequency of the vibration-proofing portion 23 can be reduced, and thus the sound insulation performance can be improved.

[0047] In addition, the support legs 11 have: A vibration-isolating section 11a (floor vibration-isolating section) having vibration-isolating properties is provided, The spring constant of the vibration-isolating portion 23 is It is formed to have a spring constant larger than that of the vibration-proof portion 11a.

[0048] With this configuration, it is possible to improve sound insulation performance while suppressing sinking of the ends of the floor material 12.

[0049] In addition, the wall material 22 is It is provided on the upper side of the floor material 12.

[0050] With this configuration, the first space R1 and the second space R2 can be suitably connected to each other.

[0051] The parting wall 3 according to this embodiment is one form of a wall according to the present invention. Moreover, the vibration-isolating portion 11a according to this embodiment is one form of the floor vibration-isolating portion according to the present invention. The vibration-isolating portion 23 according to this embodiment is one form of a wall vibration-isolating portion according to the present invention.

[0052] Although one embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims. For example, the shapes, dimensions, and spacing of each part of the double floor 10 and the false wall 20 are not limited to those described above, and can be modified as appropriate. In addition, the specific numerical values ​​exemplified in the above description are merely examples, and can be modified as desired.

[0053] In addition, in the present embodiment, an example has been shown in which the false wall 20 is provided on the parting wall 3, but the present invention is not limited to this. For example, the false wall 20 may be provided on the outer wall or partition of a building.

[0054] In addition, in this embodiment, an example has been shown in which the sound-proofing structure 1 is applied to an apartment building (such as a tenement house or condominium), but the present invention is not limited to this and can be applied to various buildings such as detached houses, accommodation facilities, elderly care facilities (care facilities), medical facilities, commercial facilities, etc. [Explanation of symbols]

[0055] 1. Soundproofing structure 2. Floor slab 10 double floor 20. Raised Wall

Claims

1. A floor material supported by a support leg on the floor slab with a first space between the floor material and the floor slab; A wall material arranged with a second space between the wall rising from the floor slab and the wall material; Equipped with The first space and the second space are in communication with each other. Soundproofing structure.

2. A wall base is provided in the second space and to which the wall material is fixed, The end of the floor material is supported by the wall base, A wall vibration-proof part is provided at the lower end of the wall base, which has vibration-proofing properties and supports the wall base against the floor slab. The sound insulating structure according to claim 1.

3. The support legs include: A floor vibration-proof section having vibration-proof properties is provided, The spring constant of the wall vibration isolating part is The spring constant is larger than that of the floor vibration isolation part. The sound insulating structure according to claim 2.

4. The wall material is Provided on the upper side of the flooring, The sound insulation structure according to claim 2 or 3.

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