Sound insulation floor structure

Abstract

To provide a sound insulation floor structure that is easy to install.SOLUTION: The sound insulation floor structure of the present invention comprises: a bonding layer having a sound absorption layer composed of a sound-absorbing material and a plate-shaped sound absorption layer retaining layer disposed over and bonded to the sound absorption layer; and an upper layer disposed above the bonding layer and composed of a base material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Conventionally, a floor structure that reduces the transmission of impact sounds from upper floors to lower floors in a building has been known (see Patent Document 1). This floor structure comprises a sound-absorbing layer made of glass wool, rock wool, or the like and placed on a structural floor, and a floor panel layer that is a plate-like member and placed on the sound-absorbing layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2-190565 Summary of the Invention [Problem to be solved by the invention]

[0004] The construction of this floor structure involves laying soft glass wool on the structural floor, and then placing a plate-shaped floor panel layer on top of the laid glass wool, which is a complex and labor-intensive process.

[0005] Therefore, an object of the present invention is to provide a sound-insulating floor structure that is easy to construct. [Means for solving the problem]

[0006] The sound-insulating floor structure of the present invention is a sound absorbing layer made of a sound absorbing material; and a bonding layer having a plate-shaped sound absorbing layer holding layer disposed on the sound absorbing layer and bonded to the sound absorbing layer; and an upper layer disposed above the bonding layer and made of a base material.

[0007] According to this configuration, the sound-absorbing layer is joined to the sound-absorbing layer retaining layer, so that during construction, the sound-absorbing layer and the plate-shaped member (sound-absorbing layer retaining layer) placed on top of the sound-absorbing layer can be laid at the same time, making construction easier.

[0008] The sound-insulating floor structure may also include a vibration-damping sheet layer that is disposed between the joining layer and the upper layer and is made of a vibration-damping sheet.

[0009] In this way, by placing a vibration-damping sheet layer between the joining layer and the upper layer, it is possible to further reduce the sound transmitted from the upper floor to the floor below, i.e., sound insulation is further improved.

[0010] In addition, in the sound-insulating floor structure, The sound absorbing layer support layer and the sound absorbing layer may be joined by adhesive.

[0011] With this configuration, the sound absorbing layer is held by the sound absorbing layer holding layer with sufficient strength, and the sound absorbing layer is prevented from peeling off from the sound absorbing layer holding layer during transportation or installation.

[0012] In this case, for example, the sound absorbing layer support layer is a wood cement board, The sound absorbing layer may be a rock wool sound absorbing plate made by shaping rock wool into a plate with a binder.

[0013] The sound-insulating floor structure is: a fixing member that fixes the upper layer to the bonding layer; The fixing member may be inserted into the bonding layer in a non-penetrating manner.

[0014] With this configuration, the fixing member is prevented from contacting the structural floor, components, etc. below the joining layer, thereby making it possible to fix the upper layer to the joining layer while preventing damage to the structural floor, components, etc. caused by the fixing member contacting the joining layer. [Effects of the Invention]

[0015] As described above, according to the present invention, it is possible to provide a sound-insulating floor structure that is easy to construct. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a cross-sectional view of the sound-insulating floor structure according to this embodiment. [Figure 2] FIG. 2 is an exploded view of the sound-insulating floor structure. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0018] The sound-insulating floor structure according to this embodiment is formed on the structural floor of each floor of a building having two or more floors, for example.

[0019] Specifically, as shown in Figures 1 and 2, the sound-insulating floor structure 1 comprises a joining layer 2, a vibration-damping sheet layer 3, an upper layer 4, and a surface layer 5, which are stacked in this order from the structural floor R upward. The sound-insulating floor structure 1 also comprises at least one fixing member 6 that fixes the upper layer 4 and the vibration-damping sheet layer 3 to the joining layer 2.

[0020] The bonding layer 2 is placed on the structural floor R. The bonding layer 2 is a member made up of multiple layers (two layers in this embodiment), and the bonding layer 2 in this embodiment is a member made up of a sound absorbing layer 21 and a sound absorbing layer holding layer 22. The sound absorbing layer 21 and the sound absorbing layer holding layer 22 are bonded together.

[0021] In the bonding layer 2 of this embodiment, the sound absorbing layer 21 and the sound absorbing layer holding layer 22 are bonded together by adhesion. That is, the sound absorbing layer 21 and the sound absorbing layer holding layer 22 are bonded together via an adhesive layer made of an adhesive. The sound absorbing layer 21 and the sound absorbing layer holding layer 22 are also bonded together by the adhesive over the entire area of ​​their opposing surfaces.

[0022] In the bonding layer 2 of this embodiment, the sound absorbing layer holding layer 22 is thicker than the sound absorbing layer 21, that is, the thickness dimension of the sound absorbing layer holding layer 22 in the stacking direction is greater than the thickness dimension of the sound absorbing layer 21. In the sound-insulating floor structure 1, the sound absorbing layer holding layer 22 is thicker than any of the vibration-damping sheet layer 3, the upper layer 4, and the surface layer 5.

[0023] The sound absorbing layer 21 is made of a sound absorbing material. For example, the sound absorbing layer 21 is made of a member in which a fibrous material is formed into a plate shape using a resin binder. The sound absorbing layer 21 of this embodiment is made of rock wool, and has a density that can prevent sinking when workers or the like walk on the surface layer 5. The sound absorbing layer 21 of this embodiment has a thickness of 5 to 25 mm. Note that the sound absorbing layer 21 is not limited to rock wool, and may be made of any material having sound absorbing properties, such as glass wool or polyester wool.

[0024] The sound absorbing layer retaining layer 22 is a plate-like member that is placed on the sound absorbing layer 21 and to which the sound absorbing layer 21 is joined. The sound absorbing layer retaining layer 22 is a member that has a higher density and rigidity than the upper layer 4. The sound absorbing layer retaining layer 22 of this embodiment is made of a wood cement board (JIS A5404) that is easy to process, for example by cutting. The sound absorbing layer retaining layer 22 of this embodiment has a thickness of 15 to 30 mm. Note that the sound absorbing layer retaining layer 22 is not limited to a wood cement board, and may be made of any plate-like member that is more rigid than the sound absorbing layer 21, such as ALC or extruded cement board.

[0025] The vibration-damping sheet layer 3 is disposed on the bonding layer 2. This vibration-damping sheet layer 3 is made of a vibration-damping sheet having predetermined vibration-damping performance. The vibration-damping sheet layer 3 of this embodiment is made of an asphalt-based vibration-damping sheet. The thickness of the vibration-damping sheet layer 3 of this embodiment is 2 to 12 mm. Note that the vibration-damping sheet layer 3 is not limited to an asphalt-based vibration-damping sheet, and may be made of a resin-based vibration-damping sheet, a rubber-based vibration-damping sheet, or the like.

[0026] The upper layer 4 is disposed on the vibration-damping sheet layer 3. The upper layer 4 is made of plywood. In this embodiment, the thickness of the upper layer 4 is 6 to 15 mm. The upper layer 4 may be made of any material that can fix the members that make up the surface layer 5 with nails, screws, adhesives, or the like, and may be made of, for example, a particle board.

[0027] The surface layer 5 is placed on the upper layer 4. This surface layer 5 is made of a finishing material such as flooring or tiles. In this embodiment, the surface layer 5 is adhered or joined to the upper layer 4 with adhesive or nails. The thickness of the surface layer 5 in this embodiment is 5 to 15 mm. The surface layer 5 may also be made of soundproof flooring, tatami mats, carpet, boards such as gypsum boards or cement boards, etc.

[0028] The fixing member 6 is a member that fixes the vibration-damping sheet layer 3 and the upper layer 4 to the joining layer 2. This fixing member 6 is inserted (screwed in in this embodiment) into the sound-absorbing layer holding layer 22 to a position where it does not penetrate the sound-absorbing layer holding layer 22, while penetrating downward through the upper layer 4 and the vibration-damping sheet layer 3. Note that the fixing member 6 does not need to penetrate the joining layer 2, and may be inserted all the way up to the sound-absorbing layer 21.

[0029] Various materials can be selected for the fixing member 6 as long as it is capable of integrally fixing the bonding layer 2, the vibration-damping sheet layer 3, and the upper layer 4. The fixing member 6 in this embodiment is a screw. However, the fixing member 6 may also be a nail, a tacker, or the like.

[0030] Next, we will explain the construction method for the sound-insulating floor structure 1. In the construction method for the sound-insulating floor structure of this embodiment, a bonding layer forming step, a vibration-damping sheet layer forming step, an upper layer forming step, a fixing step, and a surface layer forming step are carried out in this order.

[0031] In the bonding layer forming step, the member in which the sound absorbing layer 21 and the sound absorbing layer holding layer 22 are bonded together is placed on the structural floor R with the sound absorbing layer 21 facing downwards, thereby forming the bonding layer 2.

[0032] In the vibration-damping sheet layer forming step, an asphalt-based vibration-damping sheet is disposed (laminated) on the bonding layer 2, thereby forming the vibration-damping sheet layer 3.

[0033] In the upper layer forming step, the upper layer 4 is formed by placing (stacking) plywood on the vibration-damping sheet layer 3.

[0034] In the fixing step, screws (fixing members) 6 are driven (screwed) from the upper layer 4 toward the bonding layer 2, thereby fixing the vibration-damping sheet layer 3 and the upper layer 4 to the bonding layer 2. At this time, each screw (fixing member) 6 is driven so that the tip of the screw (fixing member) 6 does not penetrate the sound-absorbing layer holding layer 22 and reach the sound-absorbing layer 21.

[0035] In the surface layer forming process, the surface layer 5 is formed by attaching a finishing material onto the upper layer 4. As a result, a sound-insulating floor structure 1 is formed on the structural floor R as a floating floor structure in which vibrations transmitted from the floor surface (surface of the surface layer 5) to the structural floor R are damped by the sound-absorbing layer 21.

[0036] In the construction method for this sound-insulating floor structure 1, when the vibration-damping sheet layer 3 and the upper layer 4 are fixed to the joining layer 2 by the fixing members, an adhesive may be applied between the layers.

[0037] The above-described sound-insulating floor structure 1 includes a sound-absorbing layer 21 made of a sound-absorbing material, a joining layer 2 having a plate-shaped sound-absorbing layer holding layer 22 disposed on top of the sound-absorbing layer 21 and joined to the sound-absorbing layer 21, and an upper layer 4 disposed above the joining layer 2 and made of a base material. Because the sound-absorbing layer 21 is joined to the sound-absorbing layer holding layer 22 in this manner, the sound-absorbing layer 21 and the plate-shaped member (sound-absorbing layer holding layer) 22 placed on top of the sound-absorbing layer 21 can be laid at the same time during construction, facilitating construction. In other words, by constructing the joining layer 2 by laying a member in which the sound-absorbing layer 21 and the sound-absorbing layer holding layer 22 are joined, the step of laying only the sound-absorbing layer 21 can be omitted, thereby shortening construction time. In other words, a floating floor structure using the sound-absorbing layer 21 can be constructed with the same number of man-hours as laying the plate-shaped member (sound-absorbing layer holding layer) 22.

[0038] Furthermore, since the sound absorbing layer 21 and the sound absorbing layer holding layer 22 are integrally (joined) to form the joining layer 2, the sound absorbing layer 21 and the sound absorbing layer holding layer 22 can be transported as a unit, processed by cutting, laid on the structural floor R, etc., making the work of constructing the sound insulating floor structure 1 easier.

[0039] Furthermore, because rock wool and the like are light and soft materials, when a worker stands on a sound-absorbing layer made of rock wool, partial depressions such as footprints are created in the sound-absorbing layer, so if the components that make up the sound-absorbing layer and the plate-like components that are layered on top of the sound-absorbing layer are laid separately, the worker cannot stand on the sound-absorbing layer when laying the plate-like components on top of the sound-absorbing layer, making the work procedure complicated. However, by laying the sound-absorbing layer 21 and the sound-absorbing layer holding layer 22 as a single unit as in the above configuration, the number of steps is reduced and the laying work is made easier.

[0040] The sound-insulating floor structure 1 of this embodiment also includes a vibration-damping sheet layer 3 that is disposed between the joining layer 2 and the upper layer 4 and is made of a vibration-damping sheet.

[0041] In this way, by disposing the vibration-damping sheet layer 3 between the joining layer 2 and the upper layer 4, it is possible to further reduce the sound transmitted from the upper floor to the floor below, that is, the sound insulation is further improved.

[0042] In the sound-insulating floor structure 1 of this embodiment, the sound-absorbing layer holding layer 22 and the sound-absorbing layer 21 are joined by adhesive. This allows the sound-absorbing layer 21 to be held by the sound-absorbing layer holding layer 22 with sufficient strength, preventing the sound-absorbing layer 21 from peeling off from the sound-absorbing layer holding layer 22 during transportation or installation.

[0043] The sound-insulating floor structure 1 of this embodiment also includes fixing members 6 that fix the upper layer 4 to the joining layer 2, and the fixing members 6 are inserted into (thrust through) the joining layer 2 in a non-penetrating manner.

[0044] This configuration prevents the fixing members 6 from coming into contact with the structural floor R, components, etc. below the joining layer 2, thereby making it possible to fix the upper layer 4 to the joining layer 2 while preventing damage to the structural floor R, components, etc. that would otherwise result from the fixing members 6 coming into contact with them. Furthermore, it is preferable that the fixing members 6 do not penetrate at least the sound absorbing layer 21 of the joining layer 2, as this does not impede the sound absorbing function of the sound absorbing layer 21.

[0045] The sound-insulating floor structure of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, or part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, part of the configuration of one embodiment can be deleted.

[0046] Furthermore, in the bonding layer 2 of the above embodiment, the sound absorbing layer 21 and the sound absorbing layer holding layer 22 are bonded (joined) over the entire area of ​​their opposing surfaces, but this configuration is not limited to this. The sound absorbing layer 21 and the sound absorbing layer holding layer 22 may also be partially bonded. The bonding between the sound absorbing layer 21 and the sound absorbing layer holding layer 22 is not limited to bonding, and they may be bonded using, for example, pins or double-sided tape. In other words, as long as the sound absorbing layer 21 is bonded so that it does not come off the sound absorbing layer holding layer 22 during transportation, processing (cutting, etc.), installation, etc. of the bonding layer 2 (members constituting the bonding layer 2), the specific bonding method and bonding members between the sound absorbing layer 21 and the sound absorbing layer holding layer 22 are not limited to this.

[0047] In the bonding layer 2 of the above embodiment, the sound absorbing layer holding layer 22 is thicker than the sound absorbing layer 21, but this configuration is not limited to this. The sound absorbing layer holding layer may be thinner than the sound absorbing layer 21 or may have the same thickness as the sound absorbing layer 21.

[0048] Furthermore, in the sound-insulating floor structure 1 of the above embodiment, the vibration-damping sheet layer 3 is disposed between the joining layer 2 and the upper layer 4, but the configuration is not limited to this. The sound-insulating floor structure 1 may be configured so that the vibration-damping sheet layer 3 is not disposed between the joining layer 2 and the upper layer 4. The sound-insulating floor structure 1 may also be configured so that the surface layer 5 is not disposed. Even with these configurations, the sound-absorbing layer 21 and the plate-like member (sound-absorbing layer holding layer) 22 disposed on the sound-absorbing layer 21 can be laid at the same time during construction, making construction easier. [Explanation of symbols]

[0049] 1...soundproof floor structure, 2...joint layer, 21...sound absorbing layer, 22...sound absorbing layer holding layer, 3...vibration-damping sheet layer, 4...upper layer, 5...surface layer, 6...fixing member, R...structural floor

Claims

1. a sound absorbing layer made of a sound absorbing material; and a bonding layer having a plate-shaped sound absorbing layer holding layer disposed on the sound absorbing layer and bonded to the sound absorbing layer; An upper layer arranged above the bonding layer and composed of a base material.

2. 2. The sound-insulating floor structure according to claim 1, further comprising a vibration-damping sheet layer disposed between the joining layer and the upper layer and made of a vibration-damping sheet.

3. The sound-insulating floor structure according to claim 1 or 2, wherein the sound-absorbing layer support layer and the sound-absorbing layer are joined by adhesive.

4. the sound absorbing layer support layer is a wood cement board, 4. The sound-insulating floor structure according to claim 3, wherein the sound-absorbing layer is a rock wool sound-absorbing board formed by bonding rock wool to a plate shape.

5. a fixing member that fixes the upper layer to the bonding layer; The sound-insulating floor structure according to claim 4, wherein the fixing members are inserted into the joining layer in a non-penetrating manner.

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