Soundproof floor structure

Abstract

To provide a soundproof floor structure capable of exhibiting a sufficient soundproofing effect against noise propagating to the outside of a building due to an impact acting on the first floor of the building.SOLUTION: A soundproof floor structure 100A has a floor beam 110A placed on the building's earthen floor H13, a joist 120A supported by the floor beam 110A, floor material 130A supported by the joist 120A, and vibration-damping material 140A placed between the floor beam 110A and the joist 120A.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a sound-insulating floor structure. [Background technology]

[0002] Conventionally, there are known inventions relating to soundproof floor structures that have soundproofing properties against everyday sounds and the like (see, for example, Patent Document 1 below). In the soundproof floor structure described in Patent Document 1, floor members are separated from each other, and the separated areas are filled with a sealant with an elastic recovery rate of 60% or more and 95% or less.

[0003] In the soundproof floor structure described in Patent Document 1, the floor members are separated from each other, so that, for example, sound generated in a certain location can be prevented from propagating to the surrounding area by solid propagation through the floor. Furthermore, the separated locations are filled with a sealing material, so that the airborne propagation of sound due to gaps is also prevented.

[0004] There is also a known invention relating to a soundproofing structure that can effectively suppress vibrations propagating from the upper floor to the lower floor in a wooden house (see, for example, Patent Document 2 below). The soundproofing structure between the upper and lower floors in a wooden house described in Patent Document 2 supports the peripheral portion of the ceiling of the lower floor with the peripheral portion of the lower floor, and supports the middle portion of the ceiling at multiple points on the floor structure of the upper floor via vibration-isolating means. Furthermore, the upper portions of multiple partition posts arranged around the periphery of the lower floor are connected to each other with horizontal members, and the ends of the horizontal members are connected to pillar members arranged around the lower floor without contacting the floor structure of the upper floor.

[0005] In the soundproofing structure described in Patent Document 2, impact vibrations and airborne vibrations input to the floor structure of the upper floor propagate through the floor structure and are radiated as sound from the ceiling and walls of the lower floor. Most of the vibrations propagate vertically downward from the floor structure of the upper floor, but because the middle part of the ceiling of the lower floor is connected to the floor structure of the upper floor via vibration isolation means, radiated sound generated by vibrations from the upper floor propagating directly from the floor surface of the upper floor to the ceiling of the lower floor is sufficiently suppressed. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2018-96083 [Patent Document 2] Japanese Patent Application Publication No. 11-324161 Summary of the Invention [Problem to be solved by the invention]

[0007] In modern buildings, noise caused by impacts on the first floor of a building and transmitted outside the building can become a problem, and measures to address this problem are needed. However, the conventional soundproofing structure described in Patent Document 2 above is intended to prevent noise from being transmitted from upper floors to lower floors. Furthermore, it is unclear whether the conventional soundproofing floor structures and soundproofing structures described in Patent Documents 1 and 2 above can provide sufficient soundproofing effects against noise caused by impacts on the first floor of a building and transmitted outside the building.

[0008] The present invention was made in consideration of the above-mentioned problems, and aims to provide a soundproof floor structure that can exert a sufficient soundproofing effect against noise that propagates outside the building due to impacts acting on the first floor of a building. [Means for solving the problem]

[0009] In order to achieve the above object, one aspect of the soundproof floor structure according to the present invention is as follows: A soundproof floor structure on the first floor of a building, A floor beam placed on the earthen floor of the building; A joist supported by the floor beams; A floor material supported by the joists; The structure is characterized in that it has vibration-damping materials that are placed between the floor beams and the joists or between the joists and the floor material.

[0010] According to this aspect, even if an impact is applied to the flooring material, for example, when children run around on the flooring material in a playroom on the first floor of a building, the impact can be absorbed and the vibration can be damped by the vibration-damping material placed between the floor beams and the joists or between the joists and the flooring material. As a result, sound radiated from the flooring material to the space below the first floor of the building can be reduced, and noise caused by an impact acting on the flooring material on the first floor of the building and propagating outside the building can be effectively suppressed. Note that reducing sound radiated from the flooring material on the first floor of the building to the space below the floor can reduce noise propagating outside the building for reasons such as reducing sound reverberating in the space below the floor and reducing noise leaking outside the building through ventilation openings below the floor.

[0011] Another aspect of the soundproof floor structure according to the present invention is as follows: A soundproof floor structure on the first floor of a building, A floor beam placed on the earthen floor of the building; A joist supported by the floor beams; A floor material supported by the joists, A first gap is provided between the interior side of the exterior wall, the lower end of which is supported by the rising part of the foundation on the periphery of the earthen floor, and the floor material.

[0012] According to this aspect, even if an impact is applied to the floor material when children run around on the floor material in a playroom on the first floor of a building, the first gap provided between the interior side of the exterior wall and the floor material suppresses solid-state propagation of vibration from the floor material to the exterior wall. As a result, noise radiating from the exterior wall to the outside of the building is suppressed, and noise propagating to the outside of the building due to an impact applied to the floor material on the first floor of the building can be effectively suppressed.

[0013] Another aspect of the soundproof floor structure according to the present invention is as follows: A soundproof floor structure on the first floor of a building, A floor beam placed on the earthen floor of the building; A joist supported by the floor beams; A floor material supported by the joists; The floor beams and the joists are provided with vibration-proof materials arranged between the joists and the floor material, A first gap is provided between the interior side of the exterior wall, the lower end of which is supported by the rising part of the foundation on the periphery of the earthen floor, and the floor material.

[0014] According to this aspect, even if an impact is applied to the flooring material due to children running around on the flooring material in a playroom on the first floor of a building, for example, the impact can be absorbed by the vibration-damping material disposed between the floor beams and the joists or between the joists and the flooring material, thereby attenuating the vibration of the flooring material. As a result, sound radiating from the flooring material to the floor below on the first floor of the building can be reduced. Furthermore, even if vibration occurs in the flooring material, the first gap provided between the interior side of the exterior wall and the flooring material suppresses solid-state propagation of the vibration from the flooring material to the exterior wall. As a result, noise radiating from the exterior wall to the outside of the building is suppressed, and noise propagating outside the building due to an impact acting on the flooring material on the first floor of the building can be more effectively suppressed.

[0015] Another aspect of the soundproof floor structure according to the present invention is as follows: The floor beam further includes a fastener that is provided at the upper end of the floor beam to prevent lateral displacement between the support plate that supports the joists and the joists, The fastener is inserted from below into a first through hole provided in the support plate and fastened to the underside of the joist.

[0016] According to this aspect, even if an impact is applied to the flooring material, the fasteners inserted from below into the first through-holes of the support plates at the upper ends of the floor beams that support the joists from below and fastened to the underside of the joists suppress lateral displacement between the joists supporting the flooring material and the support plates at the upper ends of the floor beams. This suppresses lateral displacement between the vibration-proofing material, flooring material, and the joists. Here, "lateral direction" includes the horizontal direction and the approximately horizontal direction (a direction slightly inclined from the horizontal). Examples of fasteners include screws, nails, and lag screw bolts with internal threads, or bolt units with insert nuts.

[0017] Another aspect of the soundproof floor structure according to the present invention is as follows: The floor beam further includes a fastener that is provided at the upper end of the floor beam to prevent lateral displacement between the support plate that supports the joists and the joists, The vibration-damping material is disposed between the support plate and the joist, The fastener is characterized in that it is inserted from below through a first through hole provided in the support plate and a second through hole provided in the vibration-damping material at a position corresponding to the first through hole, and is fastened to the underside of the joist.

[0018] According to this aspect, even if an impact acts on the flooring, lateral displacement of the floor beams, vibration-damping material, and joists is suppressed by fasteners inserted from below through the first through-holes in the support plates of the floor beams and the second through-holes in the vibration-damping material arranged between the support plates of the floor beams and the joists and fastened to the underside of the joists. Furthermore, when the flooring vibrates vertically, the fasteners inserted through the first through-holes in the support plates of the floor beams and the second through-holes in the vibration-damping material allow vertical elastic deformation of the vibration-damping material. Therefore, while the fasteners suppress lateral displacement of the flooring supported on the joists, the vibration-damping material absorbs the impact acting on the flooring, and the vibration-damping material attenuates vertical vibrations of the flooring.

[0019] In another aspect of the soundproof floor structure according to the present invention, The flooring material is characterized by being a laminated material of an underfloor material and a soundproof mat.

[0020] According to this aspect, for example, in a playroom on the first floor of a building, the soundproof mat included in the flooring can absorb the impacts that act on the flooring when children run around on it, thereby reducing the sound that radiates from the flooring to the space below the first floor of the building. Therefore, it is possible to more effectively suppress noise that propagates outside the building due to impacts that act on the flooring on the first floor of the building.

[0021] In another aspect of the soundproof floor structure according to the present invention, The end of the flooring is located below a baseboard attached to the lower end of the interior side of the exterior wall, A second gap is provided between the upper surface of the end of the flooring material and the lower surface of the baseboard.

[0022] According to this aspect, the first gap between the interior side of the exterior wall and the edge of the flooring material is covered by the baseboard, improving the aesthetic appearance of the boundary between the edge of the flooring material and the exterior wall. Furthermore, the second gap between the upper surface of the edge of the flooring material and the lower surface of the baseboard prevents vibrations from the flooring material from propagating through a solid from the flooring material to the baseboard, thereby suppressing noise propagating from the exterior wall to the outside of the building. Furthermore, if the soundproof floor structure includes vibration-damping material, when an impact acts on the flooring material, the vibration-damping material may be compressed vertically and elastically deformed. The elastic deformation of the vibration-damping material may then be restored, causing an upward rebound (such as bouncing up or bulging) due to the reaction to the restoration. In cases where such rebound is possible, contact between the upper surface of the flooring material and the lower surface of the baseboard can be avoided by setting the amount of rebound and taking the amount of rebound into account when setting the height of the second gap. [Effects of the Invention]

[0023] As can be understood from the above explanation, according to each of the above aspects of the present invention, it is possible to provide a soundproof floor structure that can exert a sufficient soundproofing effect against noise that propagates outside the building due to an impact acting on the first floor of a building. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a cross-sectional view of a part of a building showing a first embodiment of the soundproof floor structure of the present invention. [Figure 2] FIG. 2 is an enlarged cross-sectional view of the soundproof floor structure of the building shown in FIG. [Figure 3] FIG. 10 is an enlarged cross-sectional view showing a second embodiment of the soundproof floor structure of the present invention. [Figure 4] FIG. 10 is an enlarged cross-sectional view showing a third embodiment of the soundproof floor structure of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of the soundproof floor structure of the present invention will be described with reference to the accompanying drawings. In this specification and drawings, substantially identical components will be designated by the same reference numerals, and redundant explanations may be omitted.

[0026] [Embodiment 1] 1 is a cross-sectional view of a part of a building H showing a soundproof floor structure according to a first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a soundproof floor structure 100 of the building H shown in FIG.

[0027] A building H equipped with the soundproof floor structure 100 of this embodiment is, for example, a wooden house or other structure, as shown in Figure 1, and has a foundation H1 and an exterior wall H2. The building H also has, for example, roof beams H3, girders H4, roof joists H5, rafters H6, sheathing boards H7, tile roofing H8, and ceiling H9 shown in Figure 1, as well as foundations, studs, pipe columns, through columns, braces, eaves beams, ridge beams, and other components not shown. The building H may also be a steel-framed house or other structure.

[0028] The foundation H1 is, for example, a strip foundation including a footing H11 and a rising portion H12, and an earthen floor H13 is provided inside the strip foundation H1. The footing H11 and the rising portion H12 are, for example, a reinforced concrete structure provided as an integral unit, and the cross section perpendicular to the longitudinal direction thereof has an inverted T-shape. The earthen floor H13 is also called a concrete floor or moisture-proof concrete, and is a reinforced concrete structure provided on a moisture-proof sheet laid on the ground. Here, the foundation H1 may be a mat foundation in which the slab and rising portion are integrated, in addition to the strip foundation shown in the example.

[0029] A ventilation opening V is generally provided at the lower end of the exterior wall H2 supported by the rising portion H12 of the foundation H1. This ventilation opening V connects the underfloor space with the outdoors and enables ventilation of the underfloor space. Here, the ventilation opening V may be provided in the rising portion H12 of the foundation H1.

[0030] The soundproof floor structure 100 is a structure that constitutes the first floor of a building H. For example, as shown in FIG. 2, the soundproof floor structure 100 has floor beams 110, joists 120, floor materials 130, and vibration-damping materials 140. The soundproof floor structure 100 may further have fasteners 150, for example. The soundproof floor structure 100 may also have joists between the joists 120 and the floor materials 130, for example.

[0031] The floor beams 110 are placed on the dirt floor H13 of the building H and support the joists 120 from below. The floor beams 110 have, for example, a flat bottom plate 111 placed on the top surface of the dirt floor H13, columnar legs 112 extending vertically from the center of the bottom plate 111, and flat support plates 113 provided at the upper ends of the legs 112 and supporting the joists 120 from below. Here, the floor beams 110 may have a pair of side walls 114 that rise from both ends of the support plate 113 in the width direction of the joists 120 and extend upward along the side surfaces of the joists 120.

[0032] The joists 120 are supported from below by the floor beams 110, and support the floor material 130 from below. The soundproof floor structure 100 comprises, for example, a plurality of joists 120 arranged at predetermined intervals and a plurality of floor beams 110 supporting each of the joists 120. The plurality of joists 120 may be arranged, for example, in a lattice pattern. The joists 120 are, for example, horizontal beams made of square timber measuring approximately 90 mm square, and are connected to a base (not shown) supported on the rising portion H12 of the foundation H1. If the building H is a steel-framed house, the joists 120 may be made of steel.

[0033] The floor material 130 is supported from below by joists 120 and constitutes the first floor of the building H. A floor finishing material such as flooring is laid on top of the floor material 130. The floor material 130 may be a laminate material, for example, as shown in FIG. 2. In the example shown in FIG. 2, the floor material 130 is a laminate material in which an underfloor material 131, a soundproof mat 132, and an underfloor material 133 are layered from the lower layer side to the upper layer side. When the floor material 130 is a laminate material, the number of layers of the underfloor material and the soundproof mats and the order in which they are layered are not particularly limited.

[0034] The materials for the underfloor materials 131 and 133 may be, for example, plywood or particle board. The material for the soundproof mat 132 may be any material capable of absorbing impacts acting on the floor material 130, such as a rubber mat, a high-density glass wool board, a resin mat, a special asphalt sheet, or a composite material of these.

[0035] 2, a first horizontal gap G1 is provided between the indoor side of an exterior wall H2, the lower end of which is supported by a rising portion H12 of a foundation H1 on the periphery of a dirt floor H13, and the floor material 130. The first gap G1 has a dimension that can prevent solid-state propagation of vibrations from the floor material 130 to the exterior wall H2. Specifically, the dimension of the first gap G1 is, for example, about 1 mm to 5 mm.

[0036] 2, the end of the floor material 130 is located below a baseboard H21 attached to the lower end of the interior side of the exterior wall H2. A second vertical gap G2, for example, is provided between the upper surface of the end of the floor material 130 and the lower surface of the baseboard H21. The dimension of the second gap G2 is set, for example, so that when an impact acts on the floor material 130, the vibration-proofing material 140 is compressed and elastically deformed, and then the vibration-proofing material 140 recovers from its elastic deformation and rebounds upward in reaction to the recovery, the floor material 130 and the floor finishing material do not come into contact with the lower surface of the baseboard H21. Specifically, the dimension of the second gap G2 is, for example, approximately 1 mm to 5 mm.

[0037] The vibration-damping material 140 is disposed, for example, between the floor beam 110 and the joist 120. Alternatively, the vibration-damping material 140 may be disposed between the joist 120 and the floor material 130, as described below. The vibration-damping material 140 may be any material capable of absorbing impacts acting on the floor material 130 and suppressing vibrations of the floor material 130, such as a rubber mat, a high-density glass wool board, a resin mat, a special asphalt sheet, or a composite of these. The thickness of the vibration-damping material 140 may be greater than the thickness of the soundproof mat 132 that constitutes the floor material 130. The thickness of the vibration-damping material 140 may be less than the height of the side wall portions 114 provided at both ends of the support plate 113 of the floor beam 110.

[0038] Fastener 150 is provided at the upper end of floor beam 110 and prevents lateral displacement between support plate 113, which supports joist 120, and joist 120. Fastener 150 is inserted from below into first through-hole TH1 provided in support plate 113 of floor beam 110 and fastened to the underside of joist 120. Fastener 150 can be, for example, a screw, a nail, a lag screw bolt with an internal thread, or a bolt unit or an insert nut and bolt unit.

[0039] The support plate 113 of the floor beam 110 is, for example, a square or rectangular plate-like member having a width roughly equal to that of the joist 120. First through holes TH1 are provided at the four corners of the support plate 113. The number of first through holes TH1 provided in the support plate 113 is an example and is not particularly limited. It is preferable that the support plate 113 has at least one pair of first through holes TH1 provided on both sides of the leg portion 112 in the width direction of the joist 120.

[0040] 2, vibration-isolating material 140 is disposed between support plate 113 of floor beam 110 and joist 120. Vibration-isolating material 140 is, for example, a square or rectangular plate-like member that corresponds to the shape of support plate 113 of floor beam 110, as shown in top view TV of vibration-isolating material 140 surrounded by a two-dot chain line in FIG.

[0041] Second through holes TH2 are provided in the vibration-proof material 140 at four corners corresponding to the first through holes TH1 at the four corners of the support plate 113. Note that the number of second through holes TH2 provided in the vibration-proof material 140 is just an example and is not particularly limited. It is preferable that the vibration-proof material 140 has at least one pair of second through holes TH2 corresponding to at least one pair of first through holes TH1 in the support plate 113.

[0042] In the example shown in Figure 2, the fastener 150 is inserted from below through a first through hole TH1 provided in the support plate 113 of the floor beam 110 and a second through hole TH2 provided at a position corresponding to the first through hole TH1 of the vibration-damping material 140, and is fastened to the underside of the joist 120.

[0043] For example, when fastener 150 is inserted through first through hole TH1 and second through hole TH2, there may be a gap of about 1 mm to several mm between fastener 150 and the inner walls of first through hole TH1 and second through hole TH2. Furthermore, at the lower end of fastener 150, there is provided a head portion having a diameter larger than the diameter of first through hole TH1. When fastened to the underside of joist 120, there is a gap of about 1 mm to 5 mm between the head portion of fastener 150 and support plate 113 of floor beam 110.

[0044] The operation of the soundproof floor structure 100 of this embodiment will now be described.

[0045] For example, when children run around on flooring in a playroom or the like on the first floor of a building, impacts are applied to the flooring. Noise caused by such impacts acting on the flooring may propagate outside the building and affect neighboring areas. The soundproof floor structure 100 of this embodiment is a structure constituting the first floor of building H, which can provide sufficient soundproofing against noise caused by impacts acting on flooring materials 130 on the first floor of building H and propagating outside the building H. Specifically, the soundproof floor structure 100 includes floor beams 110 placed on the earthen floor H13 of building H, joists 120 supported by the floor beams 110, flooring materials 130 supported by the joists 120, and vibration-damping materials 140 arranged between the floor beams 110 and the joists 120 or between the joists 120 and the flooring materials 130. The soundproof floor structure 100 has a first gap G1 between the floor material 130 and the indoor side of the exterior wall H2, the lower end of which is supported by the rising portion of the foundation H1 on the periphery of the earthen floor H13.

[0046] According to the soundproof floor structure 100 of this embodiment, the vibration-damping materials 140 placed between the floor beams 110 and the joists 120 or between the joists 120 and the floor material 130 can mitigate impacts acting on the floor material 130. As a result, it is possible to reduce sound radiated from the floor material 130 to the underfloor area on the first floor of the building H. Therefore, it is possible to significantly reduce noise caused by impacts acting on the floor material 130 and propagating to the outside of the building H through the underfloor ventilation openings V and the exterior wall H2.

[0047] Furthermore, according to the soundproof floor structure 100 of this embodiment, even if vibrations occur in the floor material 130 due to an impact acting on the floor material 130, solid-state propagation of the vibrations from the floor material 130 to the exterior wall H2 is suppressed by the first gap G1 provided between the interior side of the exterior wall H2 and the floor material 130. As a result, noise radiated from the exterior wall H2 to the outside of the building H is suppressed, and noise propagating to the outside of the building H due to an impact acting on the floor material 130 on the first floor of the building H can be more effectively suppressed.

[0048] Specifically, by using the soundproof floor structure 100 of this embodiment, the noise that propagates outside the building H due to the impact that acts on the floor material 130 when someone steps on it can be reduced to, for example, about NC-20, which is significantly lower than the original noise level of NC-40. Furthermore, when a similar test is conducted on the soundproof floor structure 100 of this embodiment using an impact ball, which is a floor impact source defined in JIS A1418-2:2019, the noise that propagates outside the building H can be reduced to, for example, about NC-55, which is significantly lower than the original noise level of NC-80.

[0049] The soundproof floor structure 100 of this embodiment also has fasteners 150 that are provided at the upper ends of the floor beams 110 and that prevent lateral displacement between the support plates 113 that support the joists 120 and the joists 120. The fasteners 150 are inserted from below through first through holes TH1 provided in the support plates 113 of the floor beams 110 and fastened to the underside of the joists 120.

[0050] With this configuration, even if an impact acts on the floor material 130, fasteners 150 inserted from below into the first through holes TH1 of the support plate 113 of the floor beam 110 and fastened to the underside of the joists 120 suppress lateral displacement between the joists 120 supporting the floor material 130 and the floor beams 110. This makes it possible to suppress lateral displacement between the vibration-proof material 140 or the floor material 130 and the joists 120.

[0051] The soundproof floor structure 100 of this embodiment also has fasteners 150 that are provided at the upper ends of the floor beams 110 and that suppress lateral displacement between the support plates 113 that support the joists 120 and the joists 120. The vibration-damping materials 140 are also disposed between the support plates 113 of the floor beams 110 and the joists 120. The fasteners 150 are inserted from below through a first through hole TH1 provided in the support plate 113 of the floor beams 110 and a second through hole TH2 provided in the vibration-damping material 140 at a position corresponding to the first through hole TH1, and are fastened to the underside of the joists 120.

[0052] With this configuration, even if an impact acts on the floor material 130, the fasteners 150 inserted through the first through-holes TH1 of the support plates 113 of the floor beams 110 and the second through-holes TH2 of the vibration-damping materials 140 and fastened to the joists 120 suppress lateral displacement of the floor beams 110, the vibration-damping materials 140, and the joists 120. Furthermore, when an impact acts on the floor material 130, the fasteners 150 inserted through the first through-holes TH1 of the support plates 113 of the floor beams 110 and the second through-holes TH2 of the vibration-damping materials 140 allow vertical elastic deformation of the vibration-damping materials 140. Therefore, the fasteners 150 suppress lateral displacement of the floor material 130 supported on the joists 120, while the vibration-damping materials 140 absorb the impact acting on the floor material 130, thereby suppressing vibration of the floor material 130.

[0053] 2, side walls 114 are provided on both sides of the support plate 113 of the floor beam 110, along the side surfaces of the joists 120, and the thickness of the vibration-damping material 140 is smaller than the height of the side walls 114. Therefore, even when fasteners 150 are not provided, the side walls 114 provided on the support plate 113 of the floor beam 110 can suppress lateral displacement of the vibration-damping material 140 and joists 120.

[0054] In the soundproof floor structure 100 of this embodiment, the floor material 130 is a laminated material of underfloor materials 131 and 133 and a soundproof mat 132.

[0055] With this configuration, for example, the soundproof mat 132 included in the floor material 130 can mitigate the impact that acts on the floor material 130 when children run around on the floor material 130 in a playroom or the like on the first floor of the building H. As a result, it is possible to reduce the sound that radiates from the floor material 130 to the underfloor space on the first floor of the building H. Therefore, it is possible to more effectively suppress noise that propagates outside the building H due to impacts that act on the floor material 130 on the first floor of the building H.

[0056] In the soundproof floor structure 100 of this embodiment, the end of the floor material 130 is located below a baseboard H21 attached to the lower end of the interior side of the exterior wall H2. A second gap G2 is provided between the upper surface of the end of the floor material 130 and the lower surface of the baseboard H21.

[0057] With this configuration, the first gap G1 provided between the interior side of the exterior wall H2 and the end of the flooring 130 is covered by the baseboard H21, improving the aesthetic appearance of the boundary between the end of the flooring 130 and the exterior wall H2. Furthermore, the second gap G2 provided between the upper surface of the end of the flooring 130 and the lower surface of the baseboard H21 prevents vibrations from the flooring 130 from propagating through a solid from the flooring 130 to the baseboard H21, thereby suppressing noise propagating from the exterior wall H2 to the outside of the building H. When an impact is applied to the flooring 130, the vibration-proofing material 140 is compressed vertically and elastically deforms, after which the vibration-proofing material 140 recovers from its elastic deformation. The flooring 130 may rebound upward in reaction to this recovery of the vibration-proofing material 140, but the second gap G2 prevents contact between the upper surface of the flooring 130 and the lower surface of the baseboard H21.

[0058] As described above, according to this embodiment, it is possible to provide a soundproof floor structure 100 that can exert a sufficient soundproofing effect against noise that propagates outside the building H due to an impact acting on the floor material 130 that constitutes the first floor of the building H.

[0059] [Embodiment 2] A second embodiment of the soundproof floor structure according to the present disclosure will be described below with reference to Fig. 3 and Fig. 1 of the first embodiment described above. Fig. 3 is an enlarged cross-sectional view showing the second embodiment of the soundproof floor structure of the present invention.

[0060] The soundproof floor structure 100A of this embodiment shown in FIG. 3 differs from the soundproof floor structure 100 of the first embodiment described above mainly in the following respects. First, the vibration-proof material 140A is disposed between the joist 120 and the floor material 130A and does not have the second through-hole TH2. Second, the floor material 130A does not have the first gap G1 or the second gap G2 between the exterior wall H2 and the baseboard H21. Third, the soundproof floor structure 100A does not have the fastener 150. Fourth, the floor material 130A is composed of an underfloor material rather than a laminated material. Fifth, the floor beam 110A does not have the first through-hole TH1 or the side wall portion 114 in the support plate 113.

[0061] Other configurations of the soundproof floor structure 100A of this embodiment are similar to those of the soundproof floor structure 100 of the first embodiment described above, so the same parts are given the same reference numerals and the description thereof will be omitted.

[0062] Similar to the soundproof floor structure 100 of the first embodiment, the soundproof floor structure 100A of this embodiment shown in Figure 3 is a structure that constitutes the first floor of a building H. The soundproof floor structure 100A has floor beams 110A placed on the earthen floor H13 of the building H, joists 120 supported by the floor beams 110A, and floor materials 130A supported by the joists 120. The soundproof floor structure 100A also has vibration-damping materials 140A placed between the joists 120 and the floor materials 130A.

[0063] With this configuration, for example, even if an impact acts on floor material 130A when children run around on the floor material 130A in a playroom on the first floor of building H, the impact can be absorbed by vibration-damping material 140A disposed between joists 120 and floor material 130A. Therefore, according to the soundproof floor structure 100A of this embodiment, similar to the soundproof floor structure 100 of embodiment 1 described above, it is possible to reduce the sound radiated from floor material 130A into the underfloor space on the first floor of building H, and effectively suppress noise propagating outside building H due to an impact acting on floor material 130A on the first floor of building H.

[0064] [Embodiment 3] Hereinafter, a third embodiment of the soundproof floor structure according to the present disclosure will be described with reference to Fig. 4, with reference to Fig. 1 of the first embodiment described above. Fig. 4 is an enlarged cross-sectional view showing the third embodiment of the soundproof floor structure of the present invention.

[0065] The soundproof floor structure 100B of this embodiment shown in Figure 4 differs from the soundproof floor structure 100 of the first embodiment described above mainly in the following points. First, the soundproof floor structure 100B does not have vibration-damping materials 140. Second, the soundproof floor structure 100B does not have fasteners 150. Third, the floor material 130A is made of an underfloor material rather than a laminated material. Fourth, the floor beam 110A does not have the first through hole TH1 and the side wall portion 114 in the support plate 113.

[0066] Other configurations of the soundproof floor structure 100B of this embodiment are similar to those of the soundproof floor structure 100 of the first embodiment described above, so the same parts are given the same reference numerals and descriptions thereof will be omitted.

[0067] The soundproof floor structure 100B of this embodiment shown in Figure 4 is a structure that constitutes the first floor of a building H, similar to the soundproof floor structure 100 of the first embodiment described above. The soundproof floor structure 100B has floor beams 110A placed on the earthen floor of the building H, joists 120 supported by the floor beams 110A, and floor material 130A supported by the joists 120. The soundproof floor structure 100B has a first gap G1 between the indoor side of an exterior wall H2, the lower end of which is supported by a rising portion H12 of a foundation H1 on the periphery of the earthen floor H13, and the floor material 130A.

[0068] With this configuration, even if an impact is applied to the floor material 130A, for example, when children run around on the floor material 130A in a playroom on the first floor of the building H, the first gap G1 provided between the interior side of the exterior wall H2 and the floor material 130A suppresses solid-state propagation of vibration from the floor material 130A to the exterior wall H2. Therefore, according to the soundproof floor structure 100B of this embodiment, similar to the soundproof floor structure 100 of the above-mentioned first embodiment, it is possible to suppress noise radiating from the exterior wall H2 to the outside of the building H and effectively suppress noise propagating to the outside of the building H due to an impact acting on the floor material 130A on the first floor of the building H.

[0069] In addition, in the soundproof floor structure 100B of this embodiment, the end of the floor material 130A is located below a baseboard H21 attached to the lower end of the interior side of the exterior wall H2, and a second gap G2 is provided between the upper surface of the end of the floor material 130A and the lower surface of the baseboard H21.

[0070] With this configuration, the first gap G1 provided between the interior side of the exterior wall H2 and the end of the floor material 130A is covered by the baseboard H21, improving the aesthetic appearance of the boundary between the end of the floor material 130A and the exterior wall H2. In addition, the second gap G2 provided between the upper surface of the end of the floor material 130A and the lower surface of the baseboard H21 prevents vibrations of the floor material 130A from propagating through a solid from the floor material 130A to the baseboard H21, thereby suppressing noise propagating from the exterior wall H2 to the outside of the building H.

[0071] The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments. Various modifications, substitutions, etc. may be applied to the above-described embodiments without departing from the scope of the present invention. Furthermore, each of the features described with reference to the above-described embodiments may be combined as appropriate unless technically inconsistent. [Explanation of symbols]

[0072] 100: Soundproof floor structure 100A: Soundproof floor structure 100B: Soundproof floor structure 110: Floor bundle 110A: Floor bundle 113: Support plate 120: Joist 130: Flooring 131: Floor underlayment 132: Soundproof mat 133: Floor underlayment 140: Vibration isolation material 150: Fastener G1: First gap G2: Second gap H:Building H1: Foundation (cloth foundation) H12: Rising section H13: Earthen floor H2: Exterior wall H21: Baseboard TH1: 1st through hole TH2: 2nd through hole

Claims

1. A soundproof floor structure on the first floor of a building, A floor beam placed on the earthen floor of the building; A joist supported by the floor beams; A floor material supported by the joists; A soundproof floor structure characterized by having vibration-damping materials arranged between the floor beams and the joists or between the joists and the floor material.

2. A soundproof floor structure on the first floor of a building, A floor beam placed on the earthen floor of the building; A joist supported by the floor beams; A floor material supported by the joists, A soundproof floor structure characterized in that a first gap is provided between the interior side of an exterior wall whose lower end is supported by a rising portion of the foundation on the periphery of the earthen floor and the floor material.

3. A soundproof floor structure on the first floor of a building, A floor beam placed on the earthen floor of the building; A joist supported by the floor beams; A floor material supported by the joists; The floor beams and the joists are provided with vibration-proof materials arranged between the joists and the floor material, A soundproof floor structure characterized in that a first gap is provided between the interior side of an exterior wall whose lower end is supported by a rising portion of the foundation on the periphery of the earthen floor and the floor material.

4. The floor beam further includes a fastener that is provided at the upper end of the floor beam to prevent lateral displacement between the support plate that supports the joists and the joists, A soundproof floor structure according to any one of claims 1 to 3, characterized in that the fastener is inserted from below through a first through hole provided in the support plate and fastened to the underside of the joist.

5. The floor beam further includes a fastener that is provided at the upper end of the floor beam to prevent lateral displacement between the support plate that supports the joists and the joists, The vibration-damping material is disposed between the support plate and the joist, 4. The soundproof floor structure according to claim 1, wherein the fasteners are inserted from below through a first through hole provided in the support plate and a second through hole provided in the vibration-damping material at a position corresponding to the first through hole, and are fastened to the underside of the joists.

6. 4. The soundproof floor structure according to claim 1, wherein the floor material is a laminated material of an underfloor material and a soundproof mat.

7. The end of the flooring is located below a baseboard attached to the lower end of the interior side of the exterior wall, 4. The soundproof floor structure according to claim 2, wherein a second gap is provided between the upper surface of the end of the flooring material and the lower surface of the baseboard.

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