Sound insulation structure of building

Abstract

To provide a sound insulation structure of a building capable of further improving sound insulation performance.SOLUTION: A sound insulation structure of a building comprises: a floor material; a ceiling material facing the floor material in a vertical direction across a space in the building; a partition wall extending in the vertical direction and partitioning the space into a first space and a second space adjacent to each other in a horizontal direction; a floor-side sound insulation surface material which is attached to a portion of the floor material within a thickness range of the partition wall and has a coincidence frequency different from that of the floor material; and at least one surface material of ceiling side sound insulation surface materials which are stuck to a portion in the thickness range of the partition wall in the ceiling material and have a coincidence frequency different from that of the ceiling material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Various studies have been conducted on soundproofing measures to prevent sound leakage from one space to the other between two spaces separated by a partition wall in a building, as described in Patent Document 1. Patent Document 1 describes a soundproof partition wall in which hollow columns are arranged in a staggered pattern in the cross section of the wall and different types of fire-resistant boards are attached to each hollow column in a stacked manner. This partition wall is said to suppress resonance transmission and prevent a decrease in sound insulation value by using different types of fire-resistant boards in a stacked manner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 63-37710 Summary of the Invention [Problem to be solved by the invention]

[0004] While Patent Document 1 examines ways to improve the sound insulation performance of partition walls, it does not consider measures to prevent sound leakage between rooms through flooring or ceiling materials. As a result, sound generated in one of two spaces separated by a partition wall can propagate to the other space through the flooring or ceiling materials due to the coincidence effect, resulting in an issue of insufficient sound insulation.

[0005] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a sound insulation structure for a building that can further improve sound insulation performance. [Means for solving the problem]

[0006] A sound-insulating structure for a building according to one aspect of the present invention comprises a floor material, a ceiling material that faces the floor material in a vertical direction across a space within the building, a partition wall that extends in the vertical direction and divides the space into a first space and a second space that are adjacent in the horizontal direction, and at least one of a floor-side sound-insulating surface material that is attached to a portion of the floor material within the thickness range of the partition wall and has a different coincidence frequency from that of the floor material, and a ceiling-side sound-insulating surface material that is attached to a portion of the ceiling material within the thickness range of the partition wall and has a different coincidence frequency from that of the ceiling material.

[0007] In the soundproofing structure for the building, at least one of a floor-side sound-insulating surface material having a different coincidence frequency from the floor material and a ceiling-side sound-insulating surface material having a different coincidence frequency from the ceiling material is attached to a portion of the floor material or ceiling material that is within the thickness range of the partition wall. Therefore, when sound generated in one of the first and second spaces separated by the partition wall attempts to propagate to the other space through the floor material or ceiling material due to the coincidence effect, the coincidence effect can be suppressed in the portion of the floor material or ceiling material that is within the thickness range of the partition wall. This suppresses sound leakage into adjacent spaces through the floor material or ceiling material, thereby improving soundproofing performance.

[0008] The sound-insulating structure of the building may include the floor-side sound-insulating surface material and the ceiling-side sound-insulating surface material.

[0009] This configuration makes it possible to suppress sound leakage into adjacent spaces through both the floor material and the ceiling material.

[0010] In the sound insulation structure for a building, the partition wall may include a first panel extending in the vertical direction and a second panel extending in the vertical direction and arranged horizontally with a hollow space between the first panel and the second panel. The floor-side sound-insulating panel may be attached to a portion of the flooring extending from the first panel to the second panel. The ceiling-side sound-insulating panel may be attached to a portion of the ceilinging extending from the first panel to the second panel.

[0011] With this configuration, the coincidence effect of flooring and ceiling materials can be suppressed over a wide area, and sound leakage into adjacent spaces via the flooring and ceiling materials can be more reliably suppressed.

[0012] In the sound insulation structure for a building described above, the first face member may have a first inner surface facing the hollow portion. The second face member may have a second inner surface facing the hollow portion and opposing the first inner surface across the hollow portion. The partition wall may further include a first vertical member extending in the vertical direction and fixed to the first inner surface, and a second vertical member extending in the vertical direction and fixed to the second inner surface. The first vertical members and the second vertical members may be arranged in a staggered pattern along the wall surface direction of the partition wall. The soundproofing structure of the building may further comprise at least one of a first wall-side soundproofing panel that is attached to a portion of the first inner surface so as to overlap with the second vertical member when viewed from the front of the first panel and has a different coincidence frequency than the first panel, and a second wall-side soundproofing panel that is attached to a portion of the second inner surface so as to overlap with the first vertical member when viewed from the front of the second panel and has a different coincidence frequency than the second panel.

[0013] With this configuration, by adding a surface material with a different coincidence frequency from that of the surface material of the partition wall, it is possible to suppress sound leakage into the adjacent space through the partition wall. Moreover, because the additional surface material is provided on the hollow portion side of the partition wall, it is also possible to suppress an increase in the thickness of the partition wall.

[0014] In the sound insulation structure for a building, the floor-side sound-insulating surface material may be attached to a portion of the floor material that is within the thickness range of the partition wall and has a predetermined length in the wall surface direction of the partition wall, and the ceiling-side sound-insulating surface material may be attached to a portion of the ceiling material that is within the thickness range of the partition wall and has a predetermined length in the wall surface direction of the partition wall.

[0015] With this configuration, the coincidence effect of flooring and ceiling materials can be suppressed over a wider area, making it possible to more reliably suppress sound leakage into adjacent spaces through flooring and ceiling materials.

[0016] In the sound insulation structure for a building, the partition wall may include a first panel extending in the vertical direction, a second panel extending in the vertical direction and arranged horizontally with a hollow space between it and the first panel, a first vertical member extending in the vertical direction and fixed to a first inner surface of the first panel facing the hollow space, a second vertical member extending in the vertical direction and fixed to a second inner surface of the second panel facing the hollow space, and a positioning member for positioning the first vertical member and the second vertical member. The first panel and the second panel may be arranged so that their upper end surfaces abut the ceiling panel and a gap is provided between their lower end surfaces and the floor panel. The sound insulation structure for a building may include at least the floor-side sound insulation panel of the floor-side sound insulation panel and the ceiling-side sound insulation panel. The floor-side sound-insulating surface material may be thicker than the gap, be disposed on the floor material so as to close the gap from the hollow portion side, and include a portion with a greater surface density than the positioning member.

[0017] With this configuration, the gap between the face material of the partition wall and the floor material is blocked from the hollow portion side of the partition wall with the floor-side sound-insulating face material, thereby suppressing sound leakage into the adjacent room through the gap. Moreover, because the floor-side sound-insulating face material includes a portion with a higher surface density than the positioning member, it is possible to further improve sound insulation performance compared to blocking the gap by placing the positioning member directly on the floor material.

[0018] In the sound insulation structure for a building, the partition wall may include a first panel extending in the vertical direction, a second panel extending in the vertical direction and arranged horizontally with a hollow space between it and the first panel, a first vertical member extending in the vertical direction and fixed to a first inner surface of the first panel facing the hollow space, a second vertical member extending in the vertical direction and fixed to a second inner surface of the second panel facing the hollow space, and a positioning member for positioning the first vertical member and the second vertical member. The first panel and the second panel may be arranged so that their lower end surfaces abut the floor panel and a gap is provided between their upper end surfaces and the ceiling panel. The sound insulation structure for a building may include at least the ceiling-side sound insulation panel of the floor-side sound insulation panel and the ceiling-side sound insulation panel. The ceiling-side sound-insulating surface material may be thicker than the gap, be arranged on the ceiling material so as to close the gap from the hollow portion side, and include a portion with a greater surface density than the positioning member.

[0019] With this configuration, the gap between the face material of the partition wall and the ceiling material is blocked from the hollow portion side of the partition wall with the ceiling-side sound-insulating face material, thereby suppressing sound leakage into the adjacent room through the gap. Moreover, because the ceiling-side sound-insulating face material includes an area with a higher surface density than the positioning member, it is possible to further improve sound insulation performance compared to blocking the gap by placing the positioning member directly on the ceiling material.

[0020] A sound-insulating structure for a building according to another aspect of the present invention includes a floor material, a ceiling material vertically facing the floor material across a space within the building, a partition wall extending in the vertical direction and dividing the space into a first space and a second space adjacent in the horizontal direction, the partition wall having a first outer surface facing the first space and a second outer surface facing the second space, and at least one of a first ceiling-side sound-insulating surface material having a different coincidence frequency from the ceiling material and attached to a portion of the ceiling material between a position corresponding to the first outer surface and a position corresponding to the horizontal center of the first space, and a second ceiling-side sound-insulating surface material having a different coincidence frequency from the ceiling material and attached to a portion of the ceiling material between a position corresponding to the second outer surface and a position corresponding to the horizontal center of the second space.

[0021] In the soundproofing structure of the building, a surface material with a different coincidence frequency from the ceiling material is attached to the ceiling material in a position between the position corresponding to the outer surface of the partition wall and the position corresponding to the horizontal center of the space. Therefore, when sound generated in one of the first and second spaces separated by the partition wall attempts to propagate to the other space through the ceiling material due to the coincidence effect, the coincidence effect of the ceiling material can be suppressed. Therefore, sound leakage to the adjacent space through the ceiling material is suppressed, and soundproofing performance can be improved.

[0022] A sound-insulating structure for a building according to yet another aspect of the present invention comprises a floor material, a ceiling material vertically opposed to the floor material across a space within the building, a partition wall extending in the vertical direction and dividing the space into a first space and a second space adjacent in the horizontal direction, the partition wall having a first outer surface facing the first space and a second outer surface facing the second space, an exterior wall extending in a direction intersecting the partition wall, and at least one of a first exterior-wall sound-insulating surface material having a different coincidence frequency from that of the exterior wall and attached to a portion of the exterior wall between a position corresponding to the first outer surface and a position corresponding to the horizontal center of the first space, and a second exterior-wall sound-insulating surface material having a different coincidence frequency from that of the exterior wall and attached to a portion of the exterior wall between a position corresponding to the second outer surface and a position corresponding to the horizontal center of the second space.

[0023] In the soundproofing structure of the building, a surface material with a different coincidence frequency from that of the exterior wall is attached to the exterior wall in a position between the position corresponding to the outer surface of the partition wall and the position corresponding to the horizontal center of the space. Therefore, when sound generated in one of the first and second spaces separated by the partition wall attempts to propagate to the other space through the exterior wall due to the coincidence effect, the coincidence effect of the exterior wall can be suppressed. Therefore, sound leakage into adjacent spaces through the exterior wall is suppressed, and soundproofing performance can be improved.

[0024] In the sound insulation structure for a building described above, the partition wall may include a first panel extending in the vertical direction and having a first inner surface, a second panel extending in the vertical direction and arranged between the first panel in the horizontal direction and a hollow space therebetween and having a second inner surface facing the first inner surface across the hollow space, a first vertical member extending in the vertical direction and fixed to the first inner surface, and a second vertical member extending in the vertical direction and fixed to the second inner surface. The first vertical members and the second vertical members may be arranged in a staggered pattern along the wall surface direction of the partition wall. The soundproofing structure of the building may further comprise at least one of a first wall-side soundproofing panel that is attached to a portion of the first inner surface so as to overlap with the second vertical member when viewed from the front of the first panel and has a different coincidence frequency than the first panel, and a second wall-side soundproofing panel that is attached to a portion of the second inner surface so as to overlap with the first vertical member when viewed from the front of the second panel and has a different coincidence frequency than the second panel.

[0025] With this configuration, by adding a surface material with a different coincidence frequency from that of the surface material of the partition wall, it is possible to suppress sound leakage into the adjacent space through the partition wall. Moreover, because the additional surface material is provided on the hollow portion side of the partition wall, it is also possible to suppress an increase in the thickness of the partition wall. [Effects of the Invention]

[0026] As is clear from the above description, the present invention can provide a sound insulation structure for a building that can further improve sound insulation performance. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a vertical cross-sectional view schematically showing the configuration of a sound insulation structure for a building according to a first embodiment of the present invention. [Figure 2] 1 is a horizontal cross-sectional view schematically showing the configuration of a sound insulation structure for a building according to a first embodiment of the present invention. [Figure 3]FIG. 3 is a vertical cross-sectional view schematically showing the configuration of a sound-insulating structure for a building according to a modified example of the first embodiment of the present invention. [Figure 4] FIG. 4 is a vertical cross-sectional view schematically showing the configuration of a sound-insulating structure for a building according to a second embodiment of the present invention. [Figure 5] FIG. 6 is an enlarged view of the vicinity of a floor-side sound-insulating surface material of a sound-insulating structure for a building according to a second embodiment of the present invention. [Figure 6] FIG. 10 is a vertical cross-sectional view schematically showing the configuration of a sound-insulating structure for a building according to a third embodiment of the present invention. [Figure 7] FIG. 10 is a vertical cross-sectional view schematically showing the configuration of a sound-insulating structure for a building according to a fourth embodiment of the present invention. [Figure 8] FIG. 10 is a horizontal cross-sectional view schematically showing the configuration of a sound insulation structure for a building according to a fifth embodiment of the present invention. [Figure 9] FIG. 10 is a vertical cross-sectional view schematically showing the configuration of a sound insulation structure for a building according to a fifth embodiment of the present invention. [Figure 10] FIG. 10 is a vertical cross-sectional view schematically showing the configuration of a sound-insulating structure for a building according to a modified example of the fifth embodiment of the present invention. [Figure 11] FIG. 10 is a horizontal cross-sectional view schematically showing the configuration of a sound-insulating structure for a building according to another embodiment of the present invention. [Figure 12] FIG. 10 is a vertical cross-sectional view schematically showing the configuration of a sound-insulating structure for a building according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, a sound insulation structure for a building according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0029] (Embodiment 1) First, the configuration of a sound-insulating structure 1 for a building according to a first embodiment of the present invention (hereinafter also simply referred to as "sound-insulating structure 1") will be described with reference to Fig. 1 and Fig. 2. Fig. 1 schematically shows a cross section of a partition wall 30 taken along the vertical direction. Fig. 2 schematically shows a cross section of a partition wall 30 taken along the horizontal direction.

[0030] The sound-insulating structure 1 is intended to suppress sound leakage from one of two spaces (a first space S1 and a second space S2) separated by a partition wall 30 in a building such as a house to the other. As shown in Figures 1 and 2, the sound-insulating structure 1 mainly comprises a floor material 10, a ceiling material 20, the partition wall 30, a ceiling-side sound-insulating surface material 40, a floor-side sound-insulating surface material 41, a first wall-side sound-insulating surface material 42, and a second wall-side sound-insulating surface material 43. Each of these components will be described below.

[0031] The flooring material 10 has a floor surface 13 facing a space S0 within a building (for example, a living space within a house). As shown in Figure 1, the flooring material 10 has plywood 12 laid horizontally and flooring 11 laid on the plywood 12, with the upper surface of the flooring 11 forming the floor surface 13.

[0032] The ceiling material 20 faces the floor material 10 in the vertical direction across the space S0. The ceiling material 20 is made of, for example, gypsum board, and has a ceiling underside 21 that is parallel to the floor surface 13 and faces the space S0 side.

[0033] The partition wall 30 extends vertically and divides the space S0 into a first space S1 and a second space S2 that are adjacent to each other in the horizontal direction. As shown in Fig. 1, the floor material 10 and the ceiling material 20 in this embodiment have a continuous structure without any notches or gaps formed along the way from the first space S1 to the second space S2 across the partition wall 30, but this is not limiting.

[0034] As shown in Figures 1 and 2, the partition wall 30 mainly comprises a first panel 31, a second panel 32 arranged horizontally between the first panel 31 and the second panel 32 via a hollow portion S3, a first vertical member 34 (first stud) fixed to the first panel 31, a second vertical member 35 (second stud) fixed to the second panel 32, and a sound-absorbing material 33.

[0035] 1, the first face material 31 extends in the vertical direction. The first face material 31 is disposed perpendicular to the floor material 10 and the ceiling material 20, and has a first outer surface 31A facing the first space S1, a first upper end surface 31B facing the ceiling underside 21, a first lower end surface 31C facing the floor surface 13, and a first inner surface 31D (FIG. 2) facing the hollow portion S3.

[0036] The second face material 32 extends in the vertical direction, similar to the first face material 31. The second face material 32 is disposed parallel to the first face material 31 and has a second outer surface 32A facing the second space S2, a second upper end surface 32B facing the ceiling underside 21, a second lower end surface 32C facing the floor surface 13, and a second inner surface 32D (FIG. 2) facing the hollow portion S3 and opposing the first inner surface 31D across the hollow portion S3. In this embodiment, the first face material 31 and the second face material 32 have a rectangular shape in a plan view and are made of gypsum boards that have the same thickness and the same coincidence frequency as the ceiling material 20, but are not limited to this.

[0037] The first vertical member 34 is a pillar member with a rectangular cross section that extends vertically, and one side of the pillar member is fixed to the first inner surface 31D (FIG. 2). The second vertical member 35 is a pillar member with a rectangular cross section that extends vertically so as to be parallel to the first vertical member 34, and one side of the pillar member is fixed to the second inner surface 32D.

[0038] 2, the first vertical members 34 and the second vertical members 35 in this embodiment are arranged in a staggered pattern along the wall surface direction of the partition wall 30 (a direction perpendicular to the wall thickness direction of the partition wall 30). That is, an arrangement is adopted in which the positions of the first vertical members 34 and the second vertical members 35, which are lined up in order when viewed from the wall surface direction, are alternately allocated to the first inner surface 31D and the second inner surface 32D.

[0039] The sound-absorbing material 33 is a member for absorbing sound propagating from one of the first space S1 and the second space S2 to the partition wall 30, and is laid in the hollow portion S3 between the first face member 31 and the second face member 32. As shown in Fig. 2, the sound-absorbing material 33 in this embodiment is arranged in a serpentine manner along the staggered arrangement of the first vertical members 34 and the second vertical members 35. Note that the sound-absorbing material 33 is not an essential component of the present invention and may be omitted.

[0040] The ceiling-side sound-insulating surface material 40 (FIG. 1) is attached to a portion of the ceiling material 20 that is within the thickness range of the partition wall 30 (ceiling underside 21), and has a different coincidence frequency from that of the ceiling material 20. Specifically, the ceiling-side sound-insulating surface material 40 is made of gypsum board of a constant thickness that contains glass fiber nonwoven fabric, and has a coincidence frequency that is 1 / 12 octave different from that of the ceiling material 20. The ceiling-side sound-insulating surface material 40 is attached to the ceiling underside 21 with, for example, an adhesive, and may be attached to the ceiling underside 21 after the adhesive has been applied to the entire surface, or may be attached to the ceiling underside 21 after the adhesive has been applied to part of the surface.

[0041] As shown in FIG. 1, the ceiling-side sound-insulating panel material 40 in this embodiment is attached to the entire area from the first panel material 31 to the second panel material 32 of the ceiling panel material 20 (ceiling underside surface 21). One widthwise end 40A of the ceiling-side sound-insulating panel material 40 is sandwiched between the ceiling undersurface 21 and the first upper end surface 31B, while the other widthwise end 40B of the ceiling-side sound-insulating panel material 40 is sandwiched between the ceiling undersurface 21 and the second upper end surface 32B. Furthermore, the one end 40A is substantially flush with the first outer surface 31A, and the other end 40B is substantially flush with the second outer surface 32A.

[0042] Furthermore, the ceiling-side sound-insulating surface material 40 in this embodiment is attached to a portion of the ceiling material 20 that is within the thickness range of the partition wall 30 and has a predetermined length in the wall surface direction of the partition wall 30. Specifically, the ceiling-side sound-insulating surface material 40 is attached to the ceiling underside 21 over the entire wall surface direction of the partition wall 30 (the depth direction of the paper in FIG. 1 ). In other words, the ceiling-side sound-insulating surface material 40 is a board material that has short sides corresponding to the thickness of the partition wall 30 and long sides corresponding to the width of the partition wall 30.

[0043] The floor-side sound-insulating surface material 41 is attached to a portion of the floor material 10 that is within the thickness range of the partition wall 30, and has a different coincidence frequency from that of the floor material 10. Like the ceiling-side sound-insulating surface material 40, the floor-side sound-insulating surface material 41 is made of gypsum board of a constant thickness that contains glass fiber nonwoven fabric, and has a coincidence frequency that is 1 / 12 octave different from that of the floor material 10. Like the ceiling-side sound-insulating surface material 40, the floor-side sound-insulating surface material 41 is attached to the floor surface 13 with, for example, an adhesive or the like.

[0044] The floor-side sound-insulating surface material 41 in this embodiment is attached to the entire area of ​​the floor material 10 (floor surface 13) from the first surface material 31 to the second surface material 32. As shown in Fig. 1, one end 41A in the width direction of the floor-side sound-insulating surface material 41 is sandwiched between the first lower end surface 31C and the floor surface 13, while the other end 41B of the floor-side sound-insulating surface material 41 is sandwiched between the second lower end surface 32C and the floor surface 13. The one end 41A is substantially flush with the first outer surface 31A, and the other end 41B is substantially flush with the second outer surface 32A.

[0045] The floor-side sound-insulating surface material 41 in this embodiment is attached to a portion of the floor material 10 that is within the thickness range of the partition wall 30 and has a predetermined length in the wall surface direction of the partition wall 30. Specifically, the floor-side sound-insulating surface material 41 is attached to the floor surface 13 over the entire wall surface direction of the partition wall 30. In other words, the floor-side sound-insulating surface material 41 has short sides corresponding to the thickness of the partition wall 30 and long sides corresponding to the width of the partition wall 30, and is a board material of approximately the same size and shape as the ceiling-side sound-insulating surface material 40.

[0046] As shown in Fig. 2, a plurality of first wall-side sound-insulating face materials 42 are attached to a portion of the first inner surface 31D so as to overlap the second vertical members 35 in a front view of the first face material 31 (arrow P1 in Fig. 2) and to be spaced apart from the first vertical members 34 in the wall surface direction. More specifically, the first wall-side sound-insulating face materials 42 extend in the vertical direction and are attached to the first inner surface 31D with a gap from the first vertical members 34 in the wall surface direction and a gap from the second vertical members 35 in the wall thickness direction. As shown in Fig. 2, a sound-absorbing material 33 is placed in the gap between the first wall-side sound-insulating face material 42 and the second vertical members 35. The first wall-side sound-insulating face materials 42 are attached to the first inner surface 31D with, for example, an adhesive, and the adhesive may be applied to the entire bonding surface or only a portion of the bonding surface.

[0047] 2, the first wall-side sound-insulating panel 42 is located between two adjacent first vertical members 34 in the wall surface direction. The center of the first wall-side sound-insulating panel 42 in the wall surface direction coincides with the center of the second vertical member 35 in the wall surface direction, but is not limited to this.

[0048] The first wall-side sound-insulating surface material 42 has a different coincidence frequency from the first surface material 31. Specifically, the first wall-side sound-insulating surface material 42 is made of a gypsum board with a constant thickness containing glass fiber nonwoven fabric, and has a coincidence frequency that is 1 / 12 octave different from that of the first surface material 31. In this embodiment, the first wall-side sound-insulating surface material 42 is made of a gypsum board that is thinner than the first surface material 31, but is not limited to this.

[0049] A plurality of second wall-side sound-insulating face materials 43 are attached to a part of the second inner surface 32D so as to overlap with the first vertical members 34 in a front view of the second face material 32 (arrow P2 in FIG. 2 ) and to be spaced apart from the second vertical members 35 in the wall surface direction. Specifically, the second wall-side sound-insulating face materials 43 extend in the vertical direction and are attached to the second inner surface 32D with a gap from the second vertical members 35 in the wall surface direction and a gap from the first vertical members 34. A sound-absorbing material 33 is laid in the gap between the second wall-side sound-insulating face material 43 and the first vertical members 34. The second wall-side sound-insulating face materials 43 are attached to the second inner surface 32D with, for example, an adhesive, and the adhesive may be applied to the entire bonding surface or only to a part of the bonding surface.

[0050] 2, the second wall-side sound-insulating panel 43 is located between two adjacent second vertical members 35 in the wall surface direction. The center of the second wall-side sound-insulating panel 43 in the wall surface direction coincides with the center of the first vertical member 34 in the wall surface direction, but is not limited to this.

[0051] In this embodiment, the first wall-side sound-insulating panel materials 42 and the second wall-side sound-insulating panel materials 43 are arranged in a staggered pattern along the wall surface direction of the partition wall 30. That is, the positions of the first wall-side sound-insulating panel materials 42 and the second wall-side sound-insulating panel materials 43, which are lined up in order when viewed from the wall surface direction, are alternately allocated to the first inner surface 31D and the second inner surface 32D.

[0052] The second wall-side sound-insulating panel 43 has a different coincidence frequency from the second panel 32 . Specifically, the second wall-side sound-insulating surface material 43 is made of a gypsum board with a constant thickness containing glass fiber nonwoven fabric, similar to the first wall-side sound-insulating surface material 42, and has a coincidence frequency that is 1 / 12 octave different from that of the second surface material 32. The second wall-side sound-insulating surface material 43 is made of a gypsum board that is thinner than the second surface material 32, but is not limited to this.

[0053] As described above, in the sound insulation structure 1 for a building according to this embodiment, the floor-side sound-insulating surface material 41, which has a different coincidence frequency from the floor material 10, and the ceiling-side sound-insulating surface material 40, which has a different coincidence frequency from the ceiling material 20, are attached to portions of the floor material 10 and the ceiling material 20 that are within the thickness range of the partition wall 30. Therefore, when sound generated in one of the first space S1 and the second space S2 separated by the partition wall 30 attempts to propagate to the other space through the floor material 10 and the ceiling material 20 due to the coincidence effect, the coincidence effect can be suppressed in the portions of the floor material 10 and the ceiling material 20 that are within the thickness range of the partition wall 30. This suppresses sound leakage through the floor material 10 and the ceiling material 20, improving sound insulation performance.

[0054] Fig. 3 is a vertical cross-sectional view schematically showing the configuration of a sound-insulating structure 1A for a building according to a modified example of Embodiment 1. The ceiling-side sound-insulating surface material 40 is not limited to being sandwiched between the ceiling underside 21 and the upper end surface of the partition wall 30, and may have a width that fits within the hollow portion of the partition wall 30, as shown in Fig. 3. Similarly, the floor-side sound-insulating surface material 41 may also have a width that fits within the hollow portion of the partition wall 30.

[0055] (Embodiment 2) Next, a sound insulating structure 2 for a building according to a second embodiment of the present invention (hereinafter also simply referred to as "sound insulating structure 2") will be described with reference to Figures 4 and 5. The sound insulating structure 2 according to the second embodiment basically has the same configuration and produces the same effects as the sound insulating structure 1 according to the first embodiment, but differs from the first embodiment in that the floor-side sound insulating surface material 41 is formed thicker. Only the differences from the first embodiment will be described below.

[0056] The height dimension of the first surface material 31 (the distance between the first upper end surface 31B and the first lower end surface 31C) is smaller than the distance between the floor surface 13 and the ceiling underside 21. As shown in Fig. 4, the first surface material 31 is arranged so that the first upper end surface 31B abuts against the ceiling underside 21 and so that a vertical gap (first lower gap G1) is formed between the first lower end surface 31C and the floor surface 13.

[0057] Similar to the first face material 31, the height dimension of the second face material 32 (the distance between the second upper end surface 32B and the second lower end surface 32C) is smaller than the distance between the floor surface 13 and the ceiling lower surface 21. The second face material 32 is arranged so that the second upper end surface 32B abuts against the ceiling lower surface 21 and a gap (second lower gap G2) is provided between the second lower end surface 32C and the floor surface 13.

[0058] The sound-insulating structure 2 is provided with positioning members 60 (runners) that position the first vertical members 34 and the second vertical members 35 (Fig. 2) in the horizontal direction (the wall thickness direction of the partition wall 30). As shown in Fig. 4, the positioning members 60 are placed on the floor-side sound-insulating surface material 41 and fixed to the floor surface 13 with fixing devices such as screws.

[0059] 5 is an enlarged view of the vicinity of the floor-side sound-insulating surface material 41. The floor-side sound-insulating surface material 41 is a member that is thicker than the first lower gap G1 and the second lower gap G2, is placed on the floor surface 13 so as to close the first lower gap G1 and the second lower gap G2 from the hollow portion S3 side, and includes a portion with a surface density (kg / m2) greater than that of the positioning member 60. Specifically, the floor-side sound-insulating surface material 41 includes a first surface material portion 47 that has the same thickness as the first lower gap G1 and the second lower gap G2, and a second surface material portion 46 that overlaps with the lower parts of the first surface material 31 and the second surface material 32 in the horizontal direction (wall thickness direction of the partition wall 30). The second surface material portion 46 is the portion of the floor-side sound-insulating surface material 41 above the first lower end surface 31C and the second lower end surface 32C, and both widthwise side surfaces of the first surface material portion 47 block the first lower gap G1 and the second lower gap G2 from the hollow portion S3 side.

[0060] The surface density of the second face material portion 46 is greater than the surface density of the positioning member 60. The surface density of the second face material portion 46 is preferably equal to or greater than the surface density of the first face material 31 and the surface density of the second face material 32, and is further preferably equal to or greater than the surface density of the flooring material 10. On the other hand, the surface density of the first face material portion 47 is not particularly limited, and may be smaller than the surface density of the second face material portion 46 or may be the same as the surface density of the second face material portion 46.

[0061] The floor-side sound-insulating surface material 41 in this embodiment is, for example, an asphalt-based vibration-damping material in which iron powder solidified with asphalt is sandwiched between nonwoven fabrics, but is not limited to this. Furthermore, the floor-side sound-insulating surface material 41 in this embodiment has a different coincidence frequency from the floor material 10, as in the above-mentioned embodiment 1, and it is preferable that the coincidence frequencies of the floor material 10 and the floor-side sound-insulating surface material 41 differ by 1 / 12 octave.

[0062] As shown in FIG. 5, the positioning member 60 includes a flat base 61 placed on the floor-side sound-insulating panel 41 (second panel portion 46), and a central upright portion 62, a first end-side upright portion 63, and a second end-side upright portion 64 that rise vertically from the base 61. The central upright portion 62 rises vertically from the center of the base 61 in the width direction. The first end-side upright portion 63 and the second end-side upright portion 64 rise vertically from both ends of the base 61 in the width direction. The lower portion of the first vertical member 34 (FIG. 2) is inserted into the groove between the central upright portion 62 and the first end-side upright portion 63, and the lower end of the second vertical member 35 (FIG. 2) is inserted into the groove between the central upright portion 62 and the second end-side upright portion 64. As shown in FIG. 4, a positioning member 60 is also fixed to the ceiling underside 21, and the upper ends of the first vertical member 34 and the second vertical member 35 are inserted into the grooves of the positioning member 60.

[0063] The positioning member 60 is not limited to a single plate material having two grooves formed therein. For example, two plate materials having a U-shape in cross section may be placed side by side on the floor-side sound-insulating surface material 41.

[0064] According to the sound-insulating structure 2 of the second embodiment, the gaps between the first and second face members 31 and 32 and the floor surface 13 are blocked by both side surfaces of the floor-side sound-insulating face member 41, thereby suppressing sound leakage through the gaps into adjacent rooms. Moreover, because the surface density of the floor-side sound-insulating face member 41 (second face member portion 46) is greater than the surface density of the positioning member 60, sound-insulating performance can be further improved compared to blocking the gaps by placing the positioning member 60 directly on the floor surface 13. Note that the floor-side sound-insulating face member 41 is not limited to being made of asphalt-based vibration-damping material, and may be made of gypsum board, which has a higher surface density than the positioning member 60.

[0065] (Embodiment 3) Next, a sound-insulating structure 3 for a building according to a third embodiment of the present invention (hereinafter also simply referred to as "sound-insulating structure 3") will be described with reference to Fig. 6. The sound-insulating structure 3 according to the third embodiment basically has the same configuration and produces the same effects as the sound-insulating structure 2 according to the second embodiment, but differs in that there is a gap between the upper end surface of the partition wall 30 and the ceiling underside 21, and this gap is closed by a ceiling-side sound-insulating surface material 40. Only the differences from the second embodiment will be described below.

[0066] 6, the first face material 31 is disposed so that its first lower end surface 31C abuts against the floor surface 13 and a gap (first upper gap G11) is provided between its first upper end surface 31B and the ceiling lower surface 21. Similarly, the second face material 32 is disposed so that its second lower end surface 32C abuts against the floor surface 13 and a gap (second upper gap G22) is provided between its second upper end surface 32B and the ceiling lower surface 21.

[0067] The ceiling-side sound-insulating panel material 40 is thicker than the first upper gap G11 and the second upper gap G22, is disposed on the ceiling underside 21 so as to close the first upper gap G11 and the second upper gap G22 from the hollow portion S3 side, and includes a portion with a greater surface density than the positioning member 60. Specifically, the ceiling-side sound-insulating panel material 40 includes a first panel material portion 48 having the same thickness as the first upper gap G11 and the second upper gap G22, and a second panel material portion 49 that overlaps with the upper portions of the first panel material 31 and the second panel material 32 in the horizontal direction (the wall thickness direction of the partition wall 30). The second panel material portion 49 is a portion of the ceiling-side sound-insulating panel material 40 that is lower than the first upper end surface 31B and the second upper end surface 32B, and both side surfaces in the width direction of the first panel material portion 48 close the first upper gap G11 and the second upper gap G22 from the hollow portion S3 side.

[0068] The surface density of the second face material portion 49 is greater than the surface density of the positioning member 60. The surface density of the second face material portion 49 is preferably equal to or greater than the surface density of the first face material 31 and the surface density of the second face material 32, and is further preferably equal to or greater than the surface density of the ceiling material 20. On the other hand, the surface density of the first face material portion 48 is not particularly limited, and may be smaller than the surface density of the second face material portion 49 or may be the same as the surface density of the second face material portion 49.

[0069] The ceiling-side sound-insulating surface material 40 in this embodiment is, for example, but not limited to, iron powder solidified with asphalt sandwiched between nonwoven fabrics (asphalt-based vibration-damping material). Also, like in the first embodiment, the ceiling-side sound-insulating surface material 40 in this embodiment has a different coincidence frequency from the ceiling material 20, and it is preferable that the coincidence frequencies of the ceiling material 20 and the ceiling-side sound-insulating surface material 40 differ by 1 / 12 octave.

[0070] As shown in Figure 6, the positioning member 60 is disposed below the ceiling-side sound-insulating panel material 40, and is fixed to the ceiling underside 21 together with the ceiling-side sound-insulating panel material 40 with fasteners such as screws. The upper end of the first vertical member 34 (Figure 2) is inserted into the groove between the central upright portion 62 and the first end-side upright portion 63, and the upper end of the second vertical member 35 (Figure 2) is inserted into the groove between the central upright portion 62 and the second end-side upright portion 64. The positioning member 60 is also directly fixed to the floor surface 13 with fasteners such as screws.

[0071] According to the sound-insulating structure 3 of the third embodiment, the gaps between the first and second face materials 31 and 32 and the ceiling underside 21 are blocked by both side surfaces of the ceiling-side sound-insulating face material 40, thereby suppressing sound leakage through those gaps into the adjacent room. Moreover, because the ceiling-side sound-insulating face material 40 includes the second face material portion 49 that has a higher surface density than the positioning member 60, sound-insulating performance can be further improved compared to when the positioning member 60 is directly fixed to the ceiling underside 21 to block those gaps.

[0072] The ceiling-side sound-insulating surface material 40 is not limited to being made of asphalt-based vibration-damping material, but may also be made of gypsum board, which has a higher surface density than the positioning member 60. The ceiling-side sound-insulating surface material 40 in the third embodiment may also be used in combination with the floor-side sound-insulating surface material 41 in the second embodiment.

[0073] (Embodiment 4) Next, a sound-insulating structure 4 for a building according to a fourth embodiment of the present invention (hereinafter also simply referred to as "sound-insulating structure 4") will be described with reference to Fig. 7. The sound-insulating structure 4 according to the fourth embodiment further includes a first ceiling-side sound-insulating surface material 45 and a second ceiling-side sound-insulating surface material 44 in addition to the floor material 10 (omitted from Fig. 7), ceiling material 20, and partition wall 30 described in the first embodiment. Differences from the first embodiment will be described below. Note that components corresponding to those described in the first embodiment will be given the same reference numerals, and their description will be omitted.

[0074] As shown in Fig. 7, the ceiling material 20 has a ceiling upper surface 22 facing the opposite side (towards the space above the ceiling) from the ceiling lower surface 21, and a plurality of joists 50 are arranged on the ceiling upper surface 22. In this embodiment, each joist 50 is arranged so that its length faces the wall surface of the partition wall 30 (the depth direction of the paper in Fig. 7).

[0075] The multiple siding members 50 are arranged at intervals (equally spaced apart) in the horizontal direction (a direction perpendicular to the length direction of the siding members 50) on the ceiling upper surface 22. As shown in Fig. 7, the siding members 50 are arranged in portions of the ceiling upper surface 22 that are located above the first face member 31 and the second face member 32. In other words, the siding members 50 are arranged in positions on the ceiling upper surface 22 that overlap the first face member 31 and the second face member 32 in the vertical direction.

[0076] The first ceiling-side sound-insulating surface material 45 is attached to the ceiling material 20 at least in a region between a position 22A corresponding to the first outer surface 31A and a position 22B corresponding to the center of the first space S1 in the horizontal direction (wall thickness direction). More specifically, as shown in Fig. 7, the first ceiling-side sound-insulating surface material 45 is attached to the ceiling upper surface 22 in the space between one rafter 50 that overlaps the first surface material 31 in the vertical direction and another rafter 50 that is adjacent to the one rafter 50 on the first space S1 side. The "position corresponding to the first outer surface 31A" means a position of the ceiling material 20 that overlaps the first outer surface 31A in the vertical direction.

[0077] 7, the first ceiling-side sound-insulating surface material 45 in this embodiment is attached to the ceiling upper surface 22 in a part of the space between the first rafter 50 and the other rafter 50. In other words, the width W1 of the first ceiling-side sound-insulating surface material 45 is smaller than the distance between the first rafter 50 and the other rafter 50.

[0078] Furthermore, the end of the first ceiling-side sound-insulating surface material 45 on the partition wall 30 side is in contact with the side surface of the first rafter 50 (the side surface facing the other rafter 50). In other words, the center in the width direction of the first ceiling-side sound-insulating surface material 45 is located closer to the partition wall 30 (first outer surface 31A) than the center between the first rafter 50 and the other rafter 50.

[0079] The first ceiling-side sound-insulating surface material 45 has a different coincidence frequency from that of the ceiling material 20. Specifically, the first ceiling-side sound-insulating surface material 45 is made of gypsum board containing the same glass fiber nonwoven fabric as the first wall-side sound-insulating surface material 42 and the second wall-side sound-insulating surface material 43 described in the above embodiment 1, and has a coincidence frequency that is 1 / 12 octave different from that of the ceiling material 20.

[0080] The second ceiling-side sound-insulating surface material 44 is attached to the ceiling material 20 at least in a region between a position 22C corresponding to the second outer surface 32A and a position 22D corresponding to the center of the second space S2 in the horizontal direction (wall thickness direction). Specifically, as shown in Fig. 7, the second ceiling-side sound-insulating surface material 44 is attached to the ceiling upper surface 22 in the space between one rafter 50 that overlaps the second surface material 32 in the vertical direction and another rafter 50 that is adjacent to the first rafter 50 on the side of the second space S2. The "position corresponding to the second outer surface 32A" means a position of the ceiling material 20 that overlaps the second outer surface 32A in the vertical direction.

[0081] The second ceiling-side sound-insulating surface material 44 is attached to the ceiling upper surface 22 in part of the space between the first rafter 50 and the second rafter 50. That is, the width W2 of the second ceiling-side sound-insulating surface material 44 is smaller than the distance between the rafters. Furthermore, the end of the second ceiling-side sound-insulating surface material 44 on the partition wall 30 side is in contact with the side surface of the first rafter 50 (the side surface facing the second rafter 50). That is, the center in the width direction of the second ceiling-side sound-insulating surface material 44 is located closer to the partition wall 30 (second outer surface 32A) than the center between the first rafter 50 and the second rafter 50.

[0082] The second ceiling-side sound-insulating panel material 44 has a different coincidence frequency from that of the ceiling material 20. Specifically, the second ceiling-side sound-insulating panel material 44 is made of gypsum board containing the same glass fiber nonwoven fabric as the first wall-side sound-insulating panel material 42 and the second wall-side sound-insulating panel material 43 described in the first embodiment above, and has a coincidence frequency that is 1 / 12 octave different from that of the ceiling material 20. Therefore, the first wall-side sound-insulating panel material 42, the second wall-side sound-insulating panel material 43, the first ceiling-side sound-insulating panel material 45, and the second ceiling-side sound-insulating panel material 44 can share components.

[0083] As described above, in the sound-insulating structure 4 according to the fourth embodiment, a surface material having a different coincidence frequency from that of the ceiling material 20 is attached to the ceiling material 20 in a position between a position corresponding to the outer surface of the partition wall 30 and a position corresponding to the horizontal center of the space. Therefore, when sound generated in one of the first space S1 and the second space S2 separated by the partition wall 30 attempts to propagate to the other space through the ceiling material 20 due to the coincidence effect, the coincidence effect of the ceiling material 20 can be suppressed. Therefore, sound leakage through the ceiling material 20 is suppressed, and sound-insulating performance can be improved.

[0084] (Embodiment 5) Next, a sound insulating structure 5 for a building according to a fifth embodiment of the present invention (hereinafter also simply referred to as "sound insulating structure 5") will be described with reference to Figures 8 to 10. The sound insulating structure 5 according to the fifth embodiment basically has the same configuration as the sound insulating structure 4 according to the fourth embodiment, but differs in that it has a first exterior wall sound insulating panel material 73 and a second exterior wall sound insulating panel material 74 instead of the first ceiling sound insulating panel material 45 and the second ceiling sound insulating panel material 44. Only the differences from the fourth embodiment will be described below.

[0085] 8 is a horizontal cross-sectional view of the abutting portion (joint portion) between the partition wall 30 and the exterior wall 70. The soundproof structure 5 includes the exterior wall 70 extending in a direction intersecting (orthogonal to) the partition wall 30. As shown in FIG. 8, one end of the partition wall 30 in the wall surface direction abuts against the inner surface of the exterior wall 70.

[0086] The exterior wall 70 includes an exterior wall panel 71, an exterior wall facing material 72 arranged between the exterior wall panel 71 and the exterior wall panel 71 with a hollow space therebetween, and vertical beams 75 extending vertically in the hollow space. The exterior wall facing material 72 is made of, for example, gypsum board or the like, and includes an inner surface 72A facing the space S0 inside the building and a back surface 72B facing the opposite side (the hollow space side) from the inner surface 72A. The sound-insulating structure 5 includes a first exterior-wall sound-insulating face material 73 and a second exterior-wall sound-insulating face material 74 attached to the back surface 72B of the exterior wall facing material 72.

[0087] The first exterior wall sound-insulating surface material 73 is attached to a portion of the back surface 72B of the exterior wall surface material 72 between at least a position 72C corresponding to the first outer surface 31A and a position 72E corresponding to the horizontal center of the first space S1. Here, the "position corresponding to the first outer surface 31A" means a position on the back surface 72B of the exterior wall surface material 72 through which an extension line of the first outer surface 31A passes. The first exterior wall sound-insulating surface material 73 is made of gypsum board having a different coincidence frequency from that of the exterior wall surface material 72; specifically, the coincidence frequency is 1 / 12 octave different from that of the exterior wall surface material 72.

[0088] The second exterior wall sound-insulating surface material 74 is attached to the rear surface 72B of the exterior wall surface material 72 at least in a region between a position 72D corresponding to the second outer surface 32A and a position 72F corresponding to the horizontal center of the second space S2. Here, the "position corresponding to the second outer surface 32A" means a position on the rear surface 72B of the exterior wall surface material 72 through which an extension line of the second outer surface 32A passes. The second exterior wall sound-insulating surface material 74 has a different coincidence frequency from that of the exterior wall surface material 72; specifically, the coincidence frequency is 1 / 12 octave different from that of the exterior wall surface material 72.

[0089] Fig. 9 is a partial cross-sectional view of the sound-insulating structure 5 when the inner surface 72A of the exterior wall surface material 72 is viewed from the front. As shown in Fig. 9, the first exterior-wall sound-insulating surface materials 73 have a rectangular shape that is long in the vertical direction, and a plurality of them are arranged at intervals in the horizontal direction (the wall thickness direction of the partition wall 30). Similarly, the second exterior-wall sound-insulating surface materials 74 also have a rectangular shape that is long in the vertical direction, and are arranged at intervals in the horizontal direction.

[0090] In the soundproof structure 5 according to the fifth embodiment, an additional panel having a different coincidence frequency from that of the exterior wall panel 72 is attached to the exterior wall panel 72 at a location between a position corresponding to the outer surface of the partition wall 30 and a position corresponding to the horizontal center of the space S0. Therefore, when sound generated in one of the first space S1 and the second space S2 attempts to propagate to the other space via the exterior wall 70 due to the coincidence effect, the coincidence effect of the exterior wall panel 72 can be suppressed. Therefore, sound leakage to the adjacent space via the exterior wall 70 is suppressed, improving soundproofing performance.

[0091] The ends of the first exterior wall sound-insulating panel material 73 and the second exterior wall sound-insulating panel material 74 on the partition wall 30 side may further extend in the wall surface direction to a position where they overlap the partition wall 30. As shown in Fig. 10, the first exterior wall sound-insulating panel material 73 and the second exterior wall sound-insulating panel material 74 may have a rectangular shape that is long in the horizontal direction (the wall thickness direction of the partition wall 30) and may be arranged in plurality at intervals in the vertical direction. The first exterior wall sound-insulating panel material 73 and the second exterior wall sound-insulating panel material 74 in embodiment 5 may be used in combination with the first ceiling-side sound-insulating panel material 45 and the second ceiling-side sound-insulating panel material 44 in embodiment 4.

[0092] (Other embodiments) Here, other embodiments of the present invention will be described.

[0093] In the above embodiment 1, an example was described in which both the ceiling-side sound-insulating surface material 40 and the floor-side sound-insulating surface material 41 are provided, but either the ceiling-side sound-insulating surface material 40 or the floor-side sound-insulating surface material 41 may be omitted.

[0094] In the above-described first embodiment, the ceiling-side sound-insulating surface material 40 is attached to the entire portion of the ceiling underside 21 that is within the thickness range of the partition wall 30, but the ceiling-side sound-insulating surface material 40 may be attached to only a portion of that portion. Similarly, the floor-side sound-insulating surface material 41 may be attached to only a portion of the floor surface 13 that is within the thickness range of the partition wall 30.

[0095] In the above embodiment 1, an example was described in which both the first wall-side sound-insulating surface material 42 and the second wall-side sound-insulating surface material 43 are provided, but either one of the first wall-side sound-insulating surface material 42 and the second wall-side sound-insulating surface material 43 may be omitted.

[0096] In the first embodiment, the first vertical members 34 and the second vertical members 35 are arranged in a staggered pattern, but this is not limiting. For example, as in the sound insulation structure 1B for a building shown in Fig. 11, a first wall-side sound-insulating panel member 42 and a second wall-side sound-insulating panel member 43 may be arranged between two adjacent vertical members 36, and the first wall-side sound-insulating panel member 42 and the second wall-side sound-insulating panel member 43 may face each other in the wall thickness direction. This modification can also be applied to the other embodiments.

[0097] In the above-described first embodiment, the ceiling-side sound-insulating surface material 40 is attached to the ceiling underside 21, but the ceiling-side sound-insulating surface material 40 may also be attached to the surface of the ceiling material 20 facing away from the ceiling underside 21. Furthermore, the floor-side sound-insulating surface material 41 is not limited to being attached to the floor surface 13, and may be attached to the floor material 10 in a state sandwiched between the flooring 11 and the underfloor material 14, for example, as shown in FIG.

[0098] In the first embodiment, the thickness of the plaster boards that make up the floor-side sound-insulating surface material 41 may be greater than the thickness of the plaster boards that make up the ceiling-side sound-insulating surface material 40.

[0099] In the sound insulation structures 1 to 3 of the buildings according to the above embodiments 1 to 3, either one or both of the first ceiling-side sound-insulating surface material 45 and the second ceiling-side sound-insulating surface material 44 described in the above embodiment 4 may be combined, or either one or both of the first exterior wall-side sound-insulating surface material 73 and the second exterior wall-side sound-insulating surface material 74 described in the above embodiment 5 may be combined.

[0100] In the above-described fourth embodiment, multiple sheets of either or both of the first ceiling-side sound-insulating panel material 45 and the second ceiling-side sound-insulating panel material 44 may be stacked. In this case, in order to prevent fluctuations in the coincidence frequency of the panel materials, it is preferable to stack the panel materials without bonding them together.

[0101] In the above-described fourth embodiment, either or both of the first ceiling-side sound-insulating surface material 45 and the second ceiling-side sound-insulating surface material 44 may be attached to the ceiling upper surface 22 in the entire space between adjacent joists 50. Furthermore, either or both of the first ceiling-side sound-insulating surface material 45 and the second ceiling-side sound-insulating surface material 44 may be attached to the ceiling upper surface 22 not only in one joist space but also in other joist spaces, and the method of attachment to the ceiling upper surface 22 is not particularly limited as long as it can be attached to the ceiling upper surface 22, in addition to using an adhesive.

[0102] In the fourth embodiment, either or both of the first ceiling-side sound-insulating panel material 45 and the second ceiling-side sound-insulating panel material 44 may be attached to the underside 21 of the ceiling.

[0103] In the above-described fourth embodiment, the joist 50 may be arranged so that its length faces the wall thickness direction of the partition wall 30. In this case, the first ceiling-side sound-insulating surface material 45 and the second ceiling-side sound-insulating surface material 44 may also be attached to the portion of the ceiling upper surface 22 that vertically overlaps with the hollow portion of the partition wall 30. However, in order to ensure space for wiring above the ceiling, it is not necessary to place surface materials in this portion.

[0104] In the above-mentioned embodiment 4, there is no particular limitation on whether or not the ends of the first ceiling-side sound-insulating surface material 45 and the second ceiling-side sound-insulating surface material 44 contact the above-mentioned one of the furring strips 50 and the furring strips 50 adjacent to the above-mentioned one of the furring strips 50.

[0105] In the above-described fifth embodiment, one of the first exterior wall sound-insulating surface material 73 and the second exterior wall sound-insulating surface material 74 may be omitted.

[0106] The embodiments disclosed herein are illustrative in all respects and should not be construed as limiting. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0107] 1,1A,1B,2,3,4,5 Sound insulation structure of buildings 10 Flooring 13 Floor 20 Ceiling materials 21 Ceiling surface 30 Partition Wall 31 First surface material 31A 1st outer surface 31B 1st top end surface 31C 1st bottom end surface 31D First inner surface 32 Second surface material 32A 2nd outer surface 32B 2nd top end surface 32C 2nd bottom end surface 32D Second inner surface 34 1st vertical member 35 Second vertical member 40 Ceiling sound insulation material 41 Floor-side sound insulation material 42 First wall sound insulation material 43 Second wall sound insulation material 45 No. 1 ceiling soundproofing surface material 44 Second ceiling soundproofing surface material 60 Positioning member 70 Exterior Wall 73 No. 1 exterior wall sound insulation surface material 74 Second exterior wall sound insulation surface material G1 First lower gap (gap) G11 First upper gap (gap) G2 Second lower gap (gap) G22 2nd upper gap (gap) S0 space S1 1st space S2 2nd space S3 Hollow part

Claims

1. Flooring and a ceiling material that faces the floor material in a vertical direction across a space within the building; a partition wall extending in the vertical direction, dividing the space into a first space and a second space adjacent to each other in the horizontal direction, and having a first outer surface facing the first space and a second outer surface facing the second space; an outer wall extending in a direction intersecting the partition wall; A sound-insulating structure for a building, comprising at least one of a first exterior-wall sound-insulating surface material having a different coincidence frequency from that of the exterior wall and attached to a portion of the exterior wall between at least a position corresponding to the first exterior surface and a position corresponding to the horizontal center of the first space, and a second exterior-wall sound-insulating surface material having a different coincidence frequency from that of the exterior wall and attached to a portion of the exterior wall between at least a position corresponding to the second exterior surface and a position corresponding to the horizontal center of the second space.

2. The partition wall is a first face member extending in the vertical direction and having a first inner surface; a second face material extending in the vertical direction and disposed between the first face material and the second face material in the horizontal direction via a hollow portion, the second face material having a second inner surface facing the first inner surface across the hollow portion; a first vertical member extending in the vertical direction and fixed to the first inner surface; a second vertical member extending in the vertical direction and fixed to the second inner surface, The first vertical members and the second vertical members are arranged in a staggered pattern along the wall surface direction of the partition wall, 2. The sound insulation structure for a building according to claim 1, further comprising at least one of a first wall-side sound-insulating surface material attached to a portion of the first inner surface so as to overlap with the second vertical member in a front view of the first surface material and having a different coincidence frequency from that of the first surface material, and a second wall-side sound-insulating surface material attached to a portion of the second inner surface so as to overlap with the first vertical member in a front view of the second surface material and having a different coincidence frequency from that of the second surface material.

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