Sound insulation structure of building

Abstract

To provide a sound insulation structure of a building capable of further suppressing the propagation of a heavy floor impact sound from an upper floor to a lower floor in the building using a CLT panel as a floor panel.SOLUTION: A building 1 includes a sound insulation structure provided between an upper floor 1b and a lower floor 1a. The building 1 includes a floor panel 12 formed of a CLT panel, a ceiling panel 14, and a plurality of vibration-damping bodies 17. The floor panel 12 is stretched between wall panels 11 on side parts. The ceiling panel 14 is arranged so as to be separated downward from the floor panel 12, and is stretched as a ceiling of the lower floor 1a between the wall panels 11. The plurality of vibration-damping bodies 17 are placed on the ceiling panel 14, contain a main material composed of at least one kind selected from a synthetic resin and a synthetic rubber, and have vibration-damping granular bodies having a specific gravity of 0.9 to 2.5 and a particle diameter of 0.5 mm to 6.0 mm.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] In some buildings, a structure using panels made of CLT (Cross Laminated Timber) is used as a floor panel between the lower and upper floors. When CLT panels are used as floor panels in this way, there is a problem that heavy floor impact noise is loud, transmitted from the upper floor to the lower floor. Heavy floor impact noise is the impact noise that occurs, for example, when a child jumps or runs around on the upper floor.

[0003] Patent Document 1 discloses a structure for suppressing the transmission of heavy floor impact sound to the floor below when the above-mentioned CLT panels are used as floor panels. In the structure disclosed in Patent Document 1, a wooden rib structure made of beams arranged in a lattice pattern is joined to the bottom of the floor panel made of CLT panels. Patent Document 1 claims that by joining the wooden rib structure to the bottom of the floor panel, it is possible to suppress the deflection of the floor panel and suppress the transmission of heavy floor impact sound to the floor below. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-94680 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, even with the structure disclosed in the above Patent Document 1, it is believed that the propagation of heavy floor impact noise to the floors below cannot be sufficiently suppressed compared to reinforced concrete construction.

[0006] The present invention has been made to solve the above-mentioned problems, and has an object to provide a sound insulation structure for a building that can further suppress the propagation of heavy floor impact sound from upper floors to lower floors in a building that uses CLT panels as floor panels. [Means for solving the problem]

[0007] A sound insulation structure for a building according to one embodiment of the present invention is a sound insulation structure provided between an upper floor and a lower floor of a building, comprising: a floor panel constructed using CLT panels and stretched between the side wall panels between the upper floor and the lower floor; a ceiling panel arranged at a distance below the floor panel and stretched between the side wall panels as a ceiling of the lower floor; and one or more vibration dampers placed on the ceiling panel, wherein the vibration damper contains a main material consisting of at least one type selected from synthetic resin and synthetic rubber, and has vibration damping granules with a specific gravity of 0.9 to 2.5 and a particle size of 0.5 mm to 6.0 mm.

[0008] The sound insulation structure for a building according to the above embodiment is provided with one or more vibration-damping bodies placed on the ceiling panel. Therefore, the vibration energy of floor impact sound (particularly heavy floor impact sound) generated on the upper floor is absorbed and dissipated by collision and friction between the vibration-damping granular bodies of the vibration-damping body. As a result, the vibration energy of airborne sound from the floor panel and solid-borne sound from the floor panel through the wall panel is absorbed and dissipated by the vibration-damping body placed on the ceiling panel, suppressing the radiation of heavy floor impact sound to the lower floor.

[0009] The sound insulation structure for a building according to the above aspect may further include glass wool placed on the ceiling panel.

[0010] In the sound insulation structure for buildings according to the above aspect, since glass wool is also placed on the ceiling panel, it is possible to more effectively absorb the energy of airborne sound from the floor panel. Therefore, in the sound insulation structure for buildings according to the above aspect, it is possible to more effectively suppress the propagation of heavy floor impact sound from upper floors to lower floors.

[0011] In the sound insulation structure for a building according to the above aspect, the glass wool may be placed so as to cover the vibration-damping body.

[0012] In the soundproofing structure for buildings according to the above-mentioned aspect, the glass wool is arranged to cover the vibration-damping body, so that the energy of airborne sound from the floor panel can be directly absorbed by the glass wool, which is advantageous in reducing airborne sound compared to when there is a vibration-damping body on top.

[0013] The sound insulation structure for a building according to the above aspect may further include a ceiling joist disposed between the floor panel and the ceiling panel and spaced downward from the floor panel, and having an outer periphery joined to the inner wall surface of the wall panel. In this case, the ceiling panel may be joined to the ceiling joist.

[0014] In the sound insulation structure for buildings according to the above aspect, the ceiling panel is joined to the ceiling joists, so the vibration of the ceiling panel can be suppressed compared to when it is not joined, which is advantageous in suppressing the propagation of heavy floor impact noise from upper floors to lower floors.

[0015] In the sound insulation structure for a building according to the above aspect, the ceiling joists may be arranged with a space therebetween so as to be structurally separated from each other.

[0016] In the sound insulation structure of the building according to the above aspect, the ceiling joists are arranged with a space between them and the floor panels, and no structural joint structure is provided between them. That is, the ceiling joists are only joined to the wall panels at their outer periphery, and no direct joint structure is provided between them and the floor panels. Therefore, the solid-borne sound input to the ceiling panel through the ceiling joists is limited to the path from the wall panel through the ceiling joists, and compared to the case where there is a direct joint structure between the floor panel and the ceiling joists, the input path of the heavy floor impact sound input to the ceiling panel can be reduced, and the vibration damping body placed on the ceiling panel can more reliably insulate the sound.

[0017] In the sound insulation structure for a building according to the above aspect, the vibration damping body may be arranged on the ceiling panel at least along the outer periphery of the ceiling joist.

[0018] In the sound insulation structure for a building according to the above-mentioned aspect, the arrangement of the vibration-damping body on the ceiling panel is made to include at least a portion along the outer periphery, so that the input energy can be effectively absorbed and dissipated by the vibration-damping body arranged at the input portion of the vibration energy from the wall panel to the ceiling panel.

[0019] In the sound insulation structure for a building according to the above aspect, a plurality of the vibration-damping bodies may be placed on the ceiling panel. In this case, the plurality of vibration-damping bodies may be distributed on the ceiling panel such that adjacent vibration-damping bodies are spaced apart with a gap of at least one of the vibration-damping bodies therebetween.

[0020] In the sound insulation structure for buildings according to the above aspect, multiple vibration dampers are distributed on the ceiling panel, so vibration energy can be absorbed and dissipated over a relatively wide area on the ceiling panel while limiting the number of vibration dampers. Therefore, in the sound insulation structure for buildings according to the above aspect, the number of vibration dampers placed on the ceiling panel can be reduced, thereby effectively suppressing the propagation of heavy floor impact sound from upper floors to lower floors while suppressing increases in manufacturing costs and weight.

[0021] In the sound insulation structure for a building according to the above aspect, the vibration-damping body may further include a bag having the vibration-damping granular material stored therein and the edges of which are closed.

[0022] In the sound insulation structure for a building relating to the above-mentioned aspect, the vibration-damping body has a bag and the vibration-damping granular material is stored in the bag, thereby improving workability when placing the vibration-damping body on the ceiling panel. Effect of the Invention

[0023] In the sound insulation structures for buildings according to the above-mentioned aspects, in buildings using CLT panels as floor panels, the propagation of heavy floor impact noise from upper floors to lower floors can be further suppressed. [Brief description of the drawings]

[0024] [Figure 1] 1 is a cross-sectional view showing a partial structure of a building according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a plan view showing the arrangement of vibration dampers. [Diagram 3] FIG. 2 is a perspective view (partially cross-sectional view) showing the configuration of a vibration damper. [Figure 4] FIG. 11 is a plan view showing the arrangement of vibration dampers in a building according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a plan view showing the arrangement of vibration dampers in a building according to a third embodiment of the present invention. [Figure 6] FIG. 11 is a plan view showing the arrangement of vibration dampers in a building according to a fourth embodiment of the present invention. [Figure 7] FIG. 13 is a plan view showing a part of the arrangement of vibration dampers in a building according to a fifth embodiment of the present invention. [Figure 8] FIG. 11 is a cross-sectional view showing the arrangement of vibration dampers in a building according to Modification 1. [Figure 9] FIG. 11 is a cross-sectional view showing the inside of an arrangement of vibration dampers in a building according to Modification 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example of the present invention, and the present invention is not limited to the embodiment described below except for the essential configuration.

[0026] [First embodiment] 1. Structure of Building 1 The structure of a building 1 according to this embodiment will be described with reference to Fig. 1. In Fig. 1, the portion between a lower floor 1a and an upper floor 1b in the building 1 is illustrated.

[0027] As shown in Figure 1, the building comprises a wall panel 10 arranged to surround the side of the lower floor 1a, a wall panel 11 arranged to surround the side of the upper floor 1b, and a floor panel 12 stretched across the space between the wall panels 10, 11. The wall panels 10, 11 and the floor panel 12 are each made of CLT panels.

[0028] In this embodiment, the lower floor 1a and the upper floor 1b are separated by two overlapping floor panels 12. The total thickness of the two floor panels 12 is, for example, 210 mm.

[0029] Two sheets of gypsum boards 13 are joined under the floor panel 12. The gypsum boards 13 are arranged for fire prevention purposes. Although not shown in FIG. 1, a rough frame is interposed between the floor panel 12 and the gypsum boards 13.

[0030] Below the gypsum board 13, ceiling joists 15 are arranged at a distance in the Z direction (separated with a space 1c). The outer periphery of the ceiling joists 15 contacts the inner wall surface 10a of the wall panel 10 and is joined to the wall panel 10. Note that in this embodiment, the ceiling joists 15 are not directly joined to the floor panel 12 or the gypsum board 13. In other words, the ceiling joists 15 are not suspended from the floor panel 12 or the like by hanging bolts or the like, but are supported by the wall panel 10.

[0031] However, in cases where the distance (span) between the wall panels 10 is large, the floor panel 12 and the ceiling joists 15 may be connected with hanging bolts.

[0032] In addition to the outer periphery where the ceiling joist 15 is joined to the wall panel 10, the ceiling joist 15 has a plurality of portions each extending in a direction perpendicular to the plane of the paper in FIG.

[0033] Two ceiling panels 14 are arranged below the ceiling joists 15. The ceiling panels 14 are made of, for example, gypsum board, and are joined to the ceiling joists 15. In other words, the ceiling panels 14 are also supported by the ceiling joists 15, rather than being suspended from the floor panels 12, etc., by hanging bolts or the like.

[0034] A plurality of vibration dampers 17 are placed in a distributed manner on the ceiling panel 14 such that a gap corresponding to at least one vibration damper 17 is provided between adjacent vibration dampers 17. Glass wool 16 is placed on the plurality of vibration dampers 17 and on the area of ​​the ceiling panel 14 on which no vibration damper 17 is placed. That is, in this embodiment, the glass wool 16 is arranged so as to cover the entire top of the ceiling panel 14.

[0035] The arrangement of the vibration damping body 17 on the ceiling panel 14 will be described later.

[0036] Two gypsum boards 18 and a cement board 19 are stacked in this order on the floor panel 12. Furthermore, two particle boards 20 are arranged on the cement board 19 at a distance above the cement board 19 (separated with a space 1d between them).

[0037] A plurality of support legs 22 are arranged in a space 1d between the cement board 19 and the particle board 20 in the vertical direction (Z direction). Each support leg 22 is provided on the cement board 19 so as to support the lower surface of the particle board 20. The plurality of support legs 22 are arranged in a dispersed manner in the space 1d.

[0038] On top of the particle board 20, flooring 21 which forms the floor of the upper floor 1b is laid.

[0039] 2. Arrangement of the vibration damping body 17 on the ceiling panel 14 The arrangement of the vibration damping body 17 on the ceiling panel 14 will be described with reference to Fig. 2. Fig. 2 is a plan view showing the ceiling joists 15, the ceiling panel 14, and the vibration damping body 17, with the glass wool 16 omitted. Note that in Fig. 2, the vibration damping body 17 is hatched to make it easier to distinguish it from the other components.

[0040] As shown in Fig. 2, the ceiling joist 15 has an outer periphery 15a arranged along the inner wall surface 10a of the wall panel 10 at the side, and a plurality of inner parts 15b arranged in parallel to each other in the area surrounded by the outer periphery 15a. The inner parts 15b of the ceiling joist 15 are spaced apart from each other in the X direction (a direction perpendicular to the Z direction) and are formed to extend in the Y direction (a direction perpendicular to both the X direction and the Z direction). Between the inner parts 15b in the X direction and between the outer periphery 15a and the inner parts 15b, partitioned areas 1e extending in the Y direction are formed.

[0041] A plurality of vibration dampers 17 are disposed in each divided region 1e. The vibration dampers 17 in each divided region 1e are disposed in the Y direction with a gap of the same size as the vibration dampers 17 between adjacent vibration dampers 17.

[0042] In addition, when the arrangement of the vibration dampers 17 is viewed along the X direction, no vibration dampers are arranged in the adjacent area across the inner portion 15b of the vibration damper 17 arranged in any partitioned area 1e, and a vibration damper 17 is arranged in the adjacent area across the inner portion 15b. In other words, the vibration dampers 17 are arranged every other one in the X direction. That is, in this embodiment, when the multiple vibration dampers 17 on the ceiling panel 14 are viewed in plan from the +Z side (a direction perpendicular to the paper surface of FIG. 2), the multiple vibration dampers 17 on the ceiling panel 14 are arranged so as to form a so-called checkerboard pattern.

[0043] 3. Structure of vibration damper 17 The configuration of the vibration suppressor 17 will be described with reference to FIG.

[0044] As shown in the main view and cross-sectional view A1 of FIG. 3, the vibration damping body 17 has a bag 170 and vibration damping granular material 171 stored in the bag 170. The bag 170 is formed by closing both edge portions 170a of a resin tube by heat welding. The material of the bag 170 is not particularly limited, but may be, for example, a film of polyethylene, polypropylene, polyethylene terephthalate, or the like. Of these, flexible polyethylene is preferable. Furthermore, the bag 170 may be formed from a nonwoven fabric.

[0045] As shown in the partially enlarged view A2 of Fig. 3, a plurality of ventilation holes 170b are provided in the bag 170. Each ventilation hole 170b is formed with a diameter smaller than the particle size of the vibration damping granular material 171 contained therein (for example, a diameter of 0.5 mm to 2.0 mm). Air can pass in and out between the inside and outside of the bag 170 through the ventilation holes 170b.

[0046] The vibration-damping granular material 171 contains at least one main material selected from synthetic resin and synthetic rubber in its composition. The specific gravity (true specific gravity) of the vibration-damping granular material 171 is adjusted to 0.9 to 2.5, more preferably 1.2 to 2.2. The particle size of the vibration-damping granular material 171 is 0.5 mm to 6.0 mm, more preferably 1.0 mm to 5.0 mm.

[0047] Examples of the synthetic resin that can be used include PVC (polyvinyl chloride), PP (polypropylene), LDPE (low density polyethylene), HDPE (high density polyethylene), PS (polystyrene), ABS (acrylonitrile-butadiene-styrene copolymer) resin, PET (polyethylene terephthalate), soft PVC, olefin-based elastomers, styrene-based elastomers, polyester-based elastomers, urethane-based elastomers, polybutadiene-based elastomers, and polyamide-based elastomers.

[0048] As the synthetic rubber, styrene butadiene rubber (SBR), butadiene rubber (BR), butyl rubber (IIR), nitrile rubber (NBR), ethylene propylene rubber (EPDM), etc. can be used.

[0049] Furthermore, the vibration-damping granules 171 can contain, in addition to the above-mentioned main materials, secondary materials such as a plasticizer, a filler (a filler for adjusting specific gravity), and a fiber material.

[0050] Here, as the above-mentioned filler, for example, inorganic fillers such as calcium carbonate, talc, aluminum oxide, kaolin, calcium silicate, etc. can be used.

[0051] As the fiber material, organic fibers such as cellulose fibers, paper and pulp, and inorganic fibers such as glass fibers and carbon fibers can be used.

[0052] In this embodiment, the "main material" does not necessarily have to be based on the blending ratio. That is, the "main material" is at least one material selected from synthetic resin and synthetic rubber.

[0053] Next, in the vibration damper 17 of this embodiment, the filling rate of the vibration damping granules 171 in the bag 170 is adjusted to 30 volume % to 90 volume %, more preferably 40 volume % to 80 volume %. By storing the vibration damping granules 171 in the bag 170 at such a filling rate, the vibration damping granules 171 can move easily within the bag 170, and vibration energy can be absorbed and dissipated with high efficiency. Note that the above filling rate is the volume ratio that the vibration damping granules 171 occupy with respect to the maximum volume of the bag 170.

[0054] 4.Effects The building 1 according to this embodiment is equipped with a plurality of vibration dampers 17 placed on the ceiling panel 14. Therefore, for floor impact sound (particularly heavy floor impact sound) generated on the upper floor 1b, the vibration damping granules 171 in the bags 170 of the vibration dampers 17 collide and rub against each other, absorbing and dissipating the vibration energy. Therefore, the vibration energy of the airborne sound from the floor panel 12 and the solid-borne sound from the floor panel 12 via the wall panel 10 is absorbed and dissipated by the vibration dampers 17 placed on the ceiling panel 14, suppressing the radiation of heavy floor impact sound to the lower floor 1a.

[0055] In addition, in the building 1 according to this embodiment, glass wool 16 is also placed on the ceiling panel 14, so that it is possible to more effectively absorb and dissipate vibration energy for airborne sound from the floor panel 12. Therefore, in the building 1, it is possible to more effectively suppress the propagation of heavy floor impact sound from the upper floor 1b to the lower floor 1a.

[0056] In addition, in the building 1 of this embodiment, the glass wool 16 is designed to cover the vibration-damping body 17, so that the energy of the airborne sound from the floor panel 12 can be directly absorbed by the glass wool 16, which is advantageous in reducing airborne sound compared to the case where the vibration-damping body 17 is placed on top of the glass wool 16.

[0057] In addition, in the building 1 according to this embodiment, the ceiling panel 14 is joined to the ceiling joists 15, so the ceiling joists 15 act as reinforcing materials and can suppress the vibration of the ceiling panel 14 compared to when the ceiling panel 14 is not joined to the ceiling joists 15. This is therefore more advantageous in suppressing the propagation of heavy floor impact sound from the upper floor 1b to the lower floor 1a.

[0058] Furthermore, in the building 1 according to this embodiment, no direct joint structure is provided between the floor panel 12 and the ceiling joist 15, and the solid-borne sound input to the ceiling panel 14 via the ceiling joist 15 only travels through the wall panel 10 and the ceiling joist 15. Therefore, compared to a case where there is a direct joint structure (e.g., a hanging bolt) between the floor panel 12 and the ceiling joist 15, the input path of the heavy floor impact sound input to the ceiling panel 14 can be reduced, and sound can be more reliably insulated by the vibration damper 17 placed on the ceiling panel 14.

[0059] Furthermore, in the building 1 of this embodiment, the arrangement of the vibration control body 17 on the ceiling panel 14 is made to include a portion that follows the outer periphery 15a of the ceiling joists 15, so that the vibration energy input by the vibration control body 17 arranged at the input portion of the vibration energy from the wall panel 10 to the ceiling panel 14 can be effectively absorbed and dissipated.

[0060] 2, in the building 1 according to this embodiment, multiple vibration dampers 17 are distributed on the ceiling panel 14, so that vibration energy can be absorbed and dissipated in a relatively wide area on the ceiling panel 14 while limiting the number of vibration dampers 17. Therefore, in the building 1, the number of vibration dampers 17 placed on the ceiling panel 14 can be reduced, thereby effectively suppressing the propagation of heavy floor impact sound from the upper floor 1b to the lower floor 1a while suppressing increases in weight and cost.

[0061] Furthermore, in the building 1 according to this embodiment, the vibration-damping granules 171 are stored in the bags 170 in the vibration-damping body 17, which improves the workability when placing the vibration-damping body 17 on the ceiling panel 14. In other words, this makes it possible to reduce the amount of work involved compared to when attempting to place vibration-damping granules that are not stored in bags on the ceiling panel 14.

[0062] As described above, in the building 1 according to this embodiment, while using CLT panels as the floor panels 12, the propagation of heavy floor impact noise from the upper floor 1b to the lower floor 1a can be further suppressed.

[0063] 5. Confirmation of effectiveness The effectiveness was confirmed based on JIS A 1419-2:2000 "Method of evaluation of sound insulation performance of buildings and building materials." Note that, in this effectiveness confirmation, the sound insulation performance was confirmed at a frequency of 63Hz.

[0064] First, the following examples and comparative examples were evaluated.

[0065] (Example) As an example, a building with the same structure as this embodiment was used. That is, a building in which a plurality of vibration-damping bodies 17 were placed on a ceiling panel 14 so as to form a checkerboard pattern in a plan view, and glass wool 16 was further placed on the entire structure was used as the example.

[0066] (Comparative Example) As a comparative example, in contrast to the above embodiment, a building was used in which no vibration damping body 17 was placed on the ceiling panel 14, and only glass wool 16 was placed thereon.

[0067] In each of the embodiment and comparative example having the above-mentioned configuration, the following floor impact sounds were measured.

[0068] Example: 72.0 dB Comparison example: 80.8 dB As described above, from the measurement results at a frequency of 63 Hz, the floor impact sound level in the building according to the embodiment was 8.8 points lower than the floor impact sound level in the building according to the comparative example.

[0069] From the above, it was confirmed that the building in the embodiment had high sound insulation performance between the upper and lower floors.

[0070] [Second embodiment] A soundproofing structure for a building 2 according to a second embodiment of the present invention will be described with reference to Fig. 4. Fig. 4 illustrates only a portion of the structure of the building 2. The portions not illustrated in Fig. 4 have the same structure as the first embodiment. Therefore, in the following, a description of portions that overlap with the first embodiment will be omitted.

[0071] In FIG. 4 as well, the vibration damping body 17 is hatched to make it easier to distinguish it from the other components.

[0072] As shown in Fig. 4, in the building 2 according to this embodiment, a plurality of vibration-damping bodies 17 are also placed on the ceiling panel. The vibration-damping bodies 17 are arranged between each space between the ceiling joists 15. In the building 2, the vibration-damping bodies 17 are arranged over the entire portion adjacent to the inner periphery 15a of the ceiling joists 15. This is a difference from the first embodiment.

[0073] The building 2 according to this embodiment differs from the first embodiment only in the arrangement of the vibration dampers 17, and therefore can obtain the same effects as the first embodiment.

[0074] In addition, in the building 2 according to this embodiment, the vibration damping body 17 is arranged over the entire portion adjacent to the inside of the outer periphery 15a of the ceiling joist 15, so the energy of the solid-borne sound input through the wall panel 10 can be absorbed and dissipated at the entrance to the ceiling panel. Therefore, the building 2 according to this embodiment is advantageous in further suppressing the propagation of heavy floor impact sound from the upper floor 1b to the lower floor 1a while using CLT panels as the floor panels 12.

[0075] [Third embodiment] A soundproofing structure for a building 3 according to a third embodiment of the present invention will be described with reference to Fig. 5. Fig. 5 illustrates only a portion of the structure of the building 3. The same structure as in the first embodiment is adopted for the portions not illustrated in Fig. 5. Therefore, in the following, a description of the portions that overlap with the first embodiment will be omitted, and differences from the second embodiment will be mainly described.

[0076] In FIG. 5 as well, the vibration damping body 17 is hatched to make it easier to distinguish it from the other components.

[0077] 5, in the building 3 according to this embodiment, a plurality of vibration dampers 17 are placed on the ceiling panel. The vibration dampers 17 are disposed in partitioned areas 3e formed between the ceiling joists 15.

[0078] Here, in the second embodiment, the vibration damping body 17 is arranged over the entire portion adjacent to the inside of the outer periphery 15a of the ceiling joist 15, but in this embodiment, the vibration damping body 17 is arranged over only the entire portion adjacent to the inside of the outer periphery 15a extending in the X direction on both the +Y side and the -Y side. The arrangement of the vibration damping body 17 in the remaining area is the same as in the first embodiment.

[0079] As described above, the building 3 of this embodiment differs from the first and second embodiments only in the arrangement of the vibration-damping body 17, and therefore can obtain the same effects as the first and second embodiments.

[0080] Furthermore, in the building 3 according to this embodiment, the number of vibration dampers 17 arranged on the ceiling panel is reduced compared to the second embodiment, and therefore costs and weight can be reduced accordingly.

[0081] [Fourth embodiment] A soundproofing structure for a building 4 according to a fourth embodiment of the present invention will be described with reference to Fig. 6. Fig. 6 illustrates only a portion of the structure of the building 4. The same structure as in the first embodiment is adopted for the portions not illustrated in Fig. 6. Therefore, in the following, a description of the portions that overlap with the first embodiment will be omitted.

[0082] In FIG. 6 as well, the vibration damping body 17 is hatched to make it easier to distinguish it from the other components.

[0083] As shown in Fig. 6, in the building 4 according to this embodiment, the vibration dampers 17 are placed between the ceiling joists 15 on the ceiling panel with almost no gaps (over the entire area except above the ceiling joists 15). This is a difference from the first embodiment and the like.

[0084] The building 4 of this embodiment differs from the first embodiment only in that the vibration-damping body 17 is placed with almost no gaps over the entire area of ​​the ceiling panel except above the ceiling joists 15, and therefore the same effects as those of the first embodiment can be obtained.

[0085] Furthermore, in the building 4 according to this embodiment, the vibration damping bodies 17 are placed on the entire ceiling panels, which is even more advantageous in suppressing the propagation of heavy floor impact noise from the upper floor 1b to the lower floor 1a.

[0086] [Fifth embodiment] A soundproofing structure for a building 5 according to a fifth embodiment of the present invention will be described with reference to Fig. 7. Fig. 7 illustrates only a portion of the structure of the building 5. The same structure as in the first embodiment is adopted for the portions not illustrated in Fig. 7. Therefore, in the following, a description of the portions that overlap with the first embodiment will be omitted.

[0087] In FIG. 7 as well, the vibration damping body 17 is hatched to make it easier to distinguish it from the other components.

[0088] First, in the first embodiment, in each partitioned region 1e, the vibration dampers 17 are arranged so that every other one is spaced apart in the Y direction. And, the gap between the vibration dampers 17 in the Y direction in each partitioned region 1e is substantially the same as the Y direction dimension of the vibration dampers 17.

[0089] In contrast, in the building 5 according to this embodiment, the gap between the vibration dampers 17 in the Y direction in each partitioned area 5e is larger than the Y direction dimension of the vibration dampers 17. In other words, as shown in Fig. 7, when viewing adjacent partitioned areas 5e in the X direction, any one of the vibration dampers 17 and the vibration damper 17 arranged adjacently in the adjacent partitioned area 5e are arranged so that a gap G is provided in the Y direction between them.

[0090] When considering the arrangement of the vibration dampers 17 within the same partition area 5e, the gap between the vibration dampers 17 in the Y direction is the sum of the Y direction dimension of the vibration damper 17 and the gap G x 2.

[0091] As described above, the building 5 according to this embodiment differs from the first embodiment only in the arrangement of the vibration dampers 17, and therefore can obtain the same effects as the first embodiment.

[0092] Furthermore, in the building 5 according to this embodiment, the number of vibration dampers 17 arranged on the ceiling panel is reduced compared to the first embodiment, and therefore costs and weight can be reduced accordingly.

[0093] [Variation 1] The sound insulation structure of the building 6 according to the first modification will be described with reference to Fig. 8. In Fig. 8, the vibration damper 27 and its surrounding area on the ceiling panel 14 are extracted and illustrated. The parts not illustrated in Fig. 8 have the same configuration as the first embodiment and the like. Therefore, in the following, explanations of parts that overlap with the first embodiment and the like will be omitted.

[0094] 8, in the building 6 according to this modification, at least a portion of the vibration damping bodies 27 is disposed on the ceiling panel 14 so as to straddle the ceiling joists 15. The vibration damping bodies 27 are disposed so as to straddle the ceiling joists 15 and cover the ceiling panel 14 in adjacent compartment areas 6e.

[0095] Although the vibration damper 27 differs from the vibration damper 17 in bag size, it is the same as the vibration damper 17, including the composition of the vibration damping granular material filled therein.

[0096] The building of this modified example differs from the first embodiment and the like in that at least some of the vibration-damping bodies 27 are arranged to straddle the ceiling joists 15, but the other configurations are similar to those of the first embodiment and the like, so that the same effects as those of the first embodiment and the like can be obtained.

[0097] Furthermore, in the building of this modified example, at least some of the vibration-damping bodies 27 are arranged so as to straddle the ceiling joists 15 and cover the ceiling panels 14 in adjacent compartment areas 6e, so that the number of vibration-damping bodies 17 used can be reduced, which is excellent from the standpoints of component management, ease of construction, etc.

[0098] [Variation 2] The sound insulation structure of the building 7 according to the second modification will be described with reference to Fig. 9. Fig. 9 illustrates only the vibration damping body 17 arranged along the inner side of the wall panel 10 among the multiple vibration damping bodies 17 placed on the ceiling panel 14. The same configuration as in the first embodiment and the like is adopted for the parts not illustrated in Fig. 9. Therefore, in the following, the explanation of the parts overlapping with the first embodiment and the like will be omitted.

[0099] 9, in the building 7 according to this modification, a part of the vibration-damping body 37 arranged in the compartment area adjacent to the inside of the wall panel 10 climbs over the ceiling joists 15 and is arranged along the inner wall surface 10a of the wall panel 10. That is, in the building 7 according to this modification, the vibration-damping body 37 arranged in the compartment area adjacent to the inside of the wall panel 10 has a mounting portion 37a that is placed on the ceiling panel 14 and an inner abutment portion 37b that abuts against the inner wall surface 10a of the wall panel 10.

[0100] Although the vibration damper 37 differs from the vibration damper 17 in bag size, it is the same as the vibration damper 17, including the composition of the vibration damping granular material filled therein.

[0101] The building 7 of this modified example has a configuration similar to that of the above-mentioned first embodiment, etc., except that the configuration of the vibration-damping body 37 arranged in the compartment area adjacent to the inside of the wall panel 10 is different, and therefore it can obtain the same effects as the above-mentioned first embodiment, etc.

[0102] In addition, in the building 7 according to this modification, a part (the inner contact portion 37b) of the vibration damping body 37 is disposed along the inner wall surface 10a of the wall panel 10, so that the vibrations propagated from the upper floor 1b through the wall panel 10 can be absorbed and dissipated by the inner contact portion 37b of the vibration damping body 37. Therefore, in the building 7 according to this modification, the propagation of heavy floor impact sound from the upper floor to the lower floor can be more effectively suppressed.

[0103] [Other variations] In the first to fifth embodiments and the first and second modifications, the vibration-damping body 17, 27, 37 is formed by storing the vibration-damping granular material 171 in the bag 170, but the present invention is not limited to this. For example, the vibration-damping granular material may be directly disposed on the ceiling panel.

[0104] In the first to fifth embodiments and the first and second modifications, the glass wool 16 is placed on the ceiling panel 14 together with the vibration dampers 17, 27, and 37, but the glass wool is not an essential component in the present invention. Rock wool may be used instead of the glass wool 16.

[0105] In the first to fifth embodiments and the first and second modified examples, the ceiling panel 14 is joined to the lower part of the ceiling joist 15, but the ceiling joist is not an essential component of the present invention. The ceiling panel may be joined directly to the wall panel.

[0106] In the above first to fifth embodiments and the above modified examples 1 and 2, two floor panels 12, each made of a CLT panel, are stacked and arranged between the upper floor 1b and the lower floor 1a, but in the present invention, it is not necessarily necessary to arrange multiple floor panels.

[0107] In the first to fifth embodiments and the first and second modifications, CLT panels are used for the wall panels 10 and 11, but in the present invention, it is not necessary to use CLT panels for the wall panels. Laminated wood, gypsum board, etc. can also be used.

[0108] In the first to fifth embodiments and the first and second modifications, the vibration-damping granular material 171 is a granular material having the main material and the sub-material as described above, but in the present invention, waste PVC wallpaper (cloth) can also be used. This reduces waste materials, which is environmentally friendly. [Explanation of symbols]

[0109] Buildings 1-7 10,11 Wall Panel 12 Floor Panel 14 Ceiling Panel 15 Ceiling joists 17, 27, 37 Vibration damper 170 bags 171 Granular materials for vibration damping

Claims

1. A soundproofing structure provided between the upper and lower floors of a building, Between the upper floor and the lower floor, a floor panel is constructed using a CLT panel and stretched between the side wall panels; A ceiling panel is disposed below the floor panel and spaced apart from the floor panel, and is stretched between the wall panels on the sides as a ceiling of the lower floor; One or more vibration dampers placed on the ceiling panel; Equipped with The vibration damping body includes a main material made of at least one selected from synthetic resin and synthetic rubber, and has a vibration damping granular material having a specific gravity of 0.9 to 2.5 and a particle size of 0.5 mm to 6.0 mm. Soundproofing of buildings.

2. Further comprising glass wool placed on the ceiling panel. The sound insulation structure for a building according to claim 1.

3. The glass wool is placed so as to cover the vibration damping body. The sound insulation structure for a building according to claim 2.

4. A ceiling joist is further provided between the floor panel and the ceiling panel, the ceiling joist being disposed below the floor panel and spaced apart from the floor panel, and having an outer periphery joined to the inner wall surface of the wall panel; The ceiling panel is joined to the ceiling joists. The sound insulation structure for a building according to claim 1.

5. The ceiling joists are spaced apart so as to be structurally separated from the floor panels. The sound insulation structure for a building according to claim 4.

6. The vibration damping body is disposed on the ceiling panel at least along the outer periphery of the ceiling joist. The sound insulation structure for a building according to claim 4 or 5.

7. A plurality of the vibration dampers are placed on the ceiling panel, The plurality of vibration dampers are disposed on the ceiling panel in a dispersed manner so that adjacent vibration dampers are spaced apart with a gap of at least one vibration damper therebetween. The sound insulation structure for a building according to claim 1.

8. The vibration damping body further includes a bag having the vibration damping granular material stored therein and a closed edge. The sound insulation structure for a building according to claim 1.

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