JP6001899B2 - Sound insulation floor structure - Google Patents

Description

  The present invention relates to a sound insulation floor structure of a building excellent in sound insulation performance.

  Patent Document 1 uses a sound insulation material for floors that improves the sound insulation performance against lightweight impact sounds and heavy impact sounds without lowering the feeling of walking, and enables finishing materials to be fixed by nailing at an arbitrary position. A sound insulation floor structure has been disclosed. In this sound insulation floor structure, a synthetic resin foam board, a flooring material, etc. are arranged on a concrete slab. Conventionally, a structure using a lightweight cellular concrete floor board (ALC floor board) as a floor member is known in a steel structure building.

Japanese Patent Laid-Open No. 9-96094

  However, in the case of the concrete slab floor as in the sound insulation floor structure of Patent Document 1, generally a thickness of about 200 mm is required as the floor thickness. In the sound insulation floor structure using the lightweight cellular concrete floor board, for example, a lightweight cellular concrete floor board having a thickness of 100 mm is used. However, with this lightweight cellular concrete floor board, high sound insulation performance due to weight cannot be expected.

  In view of the above circumstances, the present invention provides a sound insulation floor structure that can obtain high sound insulation performance while reducing its thickness by using a precast concrete floor board as a floor member and does not cause adverse effects on workability and strength. The issue is to provide.

  In order to solve the above problems, the sound insulating floor structure of the present invention is a precast concrete floor plate, a shock absorber on the beam provided between the lower surface side of the precast concrete floor plate and the upper surface side of the flange of the beam, The precast concrete floor board is used as the beam while compressing the cushion material on the beam by being pressed against the lower surface side of the flange by tightening the other fastener with respect to one fastener embedded in the lower surface of the precast concrete floor board. A fixing tool for fixing, a soundproof mat provided on the upper surface side of the precast concrete floorboard, a base plate provided on the upper surface side of the soundproof mat, a floor base plate provided on the upper surface side of the base plate, and the above A screw or a nail for fixing the floor base plate to the base plate is provided.

  With the above configuration, the precast concrete floor board used as the floor member is heavier than the lightweight cellular concrete floor board and has excellent sound insulation performance, so it can be made thinner than the lightweight cellular concrete floor board. If the thickness can be reduced, the above-mentioned beam cushioning material, the above soundproof mat, and the above base plate can be provided to further improve the sound insulation, so that the height from the upper end surface of the above beam can be reduced. It is. Moreover, since the said one fastener is embedded in the precast concrete floor board, it is not necessary to form the through hole of fixing fixture attachment in a floor board, and sound insulation performance improves also by not forming a through hole in this way. Further, since the screw or nail does not need to enter the precast concrete floor board when fixing the floor base plate to the base board, there is no adverse effect on workability and strength due to the formation of a pilot hole in the precast concrete floor board. Even if the precast concrete floor board is thinned, no problems due to the screws or nails occur. That is, by using a precast concrete floor board as a floor member, it is possible to achieve a sound insulation floor structure that can obtain high sound insulation performance while reducing its thickness and does not cause adverse effects on workability and strength.

  The soundproof mat may be placed in a non-adhesive state on the precast concrete floor board. According to this, the soundproof mat is allowed to move up and down and the cushioning property is improved, so that the sound insulation performance is further improved.

  The above-mentioned shock absorbing material on the beam may be provided discontinuously below the edge of each precast concrete floor board, and according to this, the area of vibration transmission compared to the structure in which the above-mentioned shock absorbing material on the beam is continuously provided. And the sound insulation performance is further improved.

  A plurality of the cushioning materials on the beam may be arranged at equal intervals so as not to be positioned at both ends of the edge portion, and according to this, warpage of each precast concrete floor board over time can be prevented.

  The fixture may have an upper surface facing the lower surface of the precast concrete floor board and a lower surface facing the lower surface of the flange, and the upper surface and the lower surface may be formed non-parallel to each other, According to this, even when the thickness of the flange is slightly different, the precast concrete floor board can be firmly fixed to the beam. Further, in the fixed state of the precast concrete floor board, since the rising portion that connects the lower surface and the upper surface of the fixture can be positioned away from the edge surface of the flange, the edge surface of the fixture and the flange Can be made difficult to occur. Thereby, it is possible to prevent the impact sound from being transmitted from the fixture to the edge surface of the flange, thereby further improving the sound insulation performance.

  According to the present invention, by using a precast concrete floor board as a floor member, it is possible to obtain a high sound insulation performance while reducing its thickness and exhibit various effects such as no adverse effects on workability and strength.

It is explanatory drawing which showed the building floor structure part in which the sound-insulating floor structure based on one Embodiment of this invention was utilized. It is the perspective view which showed the arrangement | positioning aspect of the PC floor board in the building floor structure part of FIG. It is the perspective view which expanded and showed the fixture for the PC floor board in the building floor structure part of FIG. It is sectional drawing which showed the fixation structure of the PC floor board using the fixing bracket of FIG. It is explanatory drawing which expanded a part of building floor structure part of FIG.

  Next, a sound insulation floor structure according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The sound insulation floor structure according to the present invention is not limited to that shown in the following embodiment, and can be implemented with appropriate modifications within a range not changing the gist thereof.

  FIG. 1 is an explanatory view showing a lightweight steel-frame building interstitial structure part in which a sound insulation floor structure according to an embodiment of the present invention is used. FIG. 2 is a perspective view showing an aspect of the arrangement of PC (Precast Concrete) floorboards 1 in the building floor structure.

  The PC floor board 1 is disposed on a flange of a beam 2 made of, for example, H-shaped steel with a buffer material 3 on the beam interposed therebetween, and is fixed to the beam 2 by a fixing bracket 4. The length of the long side of the PC floor board 1 is 1820 mm, for example, and the length of the short side is 910 mm. The PC floor board 1 has a thickness of 90 mm, for example.

  The above-mentioned cushioning material 3 on the beam is obtained by processing a material having elasticity or viscoelasticity into a hexahedron shape, and the above beams are spaced at intervals of 455 mm so that two pieces are evenly arranged on each short side of each PC floor board 1. 2 on the flange.

  As shown in FIG. 3, the fixing bracket 4 is formed in a staircase shape by bending a metal plate, and the lower step surface 4a is located on the lower surface side of the flange of the beam 2, and the upper step The surface 4b is located on the lower surface side of the PC floor board 1. A through hole 4c is formed in the upper surface 4b. Further, the upper step surface 4b is formed non-parallel to the lower step surface 4a of the fixing bracket 4, so that the PC floor board 1 can be fixed to the beam 2 even when the thickness of the flange of the beam 2 is slightly different. It has become.

  As shown in FIG. 4, in fixing the PC floor board 1, the bolt 5 is inserted into the through long hole 4 c from below and screwed into an insert nut 1 a provided on the lower surface side of the PC floor board 1. It is. When the bolts 5 are tightened, the fixing bracket 4 is pressed against the lower surface side of the flange of the beam 2 to fix the PC floor board 1 to the beam 2. When the bolt 5 is tightened, the on-beam cushioning material 3 having an original thickness of 20 mm, for example, is compressed to a thickness of 16 mm. Since the cushioning material 3 on the beam is interposed in a compressed state, the PC floor plate 1 is not fastened to the beam 2 but is loosely fixed such as a spring is compressed. 2 will be realized. By increasing the strength of the building's frame with braces or the like, no problems arise even with the above-mentioned loose fixing. A bolt may be embedded in the PC floor board 1 and a nut may be tightened into the embedded bolt.

  A rubber plate 6 is provided between the lower step surface 4a of the fixing bracket 4 and the lower surface of the flange of the beam 2, and a rubber plate is provided between the upper step surface 4b and the lower surface of the PC floor plate 1. A washer 7 is provided.

  As shown in FIG. 5, a soundproof mat 11 made of rubber or the like having a thickness of 8 mm, for example, is laid on the PC floor board 1 without an adhesive. On the upper surface of the soundproof mat 11, a steel plate (base plate) 12 having a thickness of, for example, 0.8 mm that can be fastened with screws and nails is integrated with the soundproof mat 11 by bonding. A particle board (floor base material) 13 having a thickness of, for example, 15 mm is provided on the steel plate 12, and a floor finish plate 14 having a thickness of, for example, 12 mm is provided on the particle board 13. A soundproof mat may be further disposed on the steel plate 12.

  The particle board 13 is fastened to the steel plate 12 by screws 15. The screw 15 does not enter the PC floor plate 1, and no screw pilot hole is formed in the PC floor plate 1. A nail can be used in place of the screw 15.

  As shown in FIG. 1, a ceiling base panel 8 is provided on the ceiling side of the building floor structure. The ceiling base panel 8 includes an outer frame 8a and a reinforcing member. A rock wool 9 is placed on the ceiling base panel 8.

  Since the PC floor board 1 is heavier than the lightweight cellular concrete floor board and has excellent sound insulation performance, the PC floor board 1 can be made thinner than the lightweight cellular concrete floor board. Even if the thickness of the material 3 is increased, or the soundproofing mat 11 and the steel plate 12 are provided to further improve the sound insulation, the height from the upper end surface of the beam 2 can be reduced without much increase. It is. Further, since the screw 15 does not need to enter the PC floor plate 1 when fixing the particle board 13 to the steel plate 12, there is no adverse effect on the workability and strength due to the formation of a pilot hole in the PC floor plate 1. Even if the PC floor board 1 is thinned, no problem due to the screw 15 occurs. That is, by using the PC floor board 1 as the floor member, it is possible to obtain a high sound insulation performance while reducing the thickness of the floor member, and to prevent adverse effects on workability and strength.

  Further, in this embodiment, the on-beam cushioning material 3 is discontinuously arranged on each short side of each PC floor board 1. Thus, since the above-mentioned buffer material 3 on the beam is not continuously arranged on the entire short side of each PC floor board 1, the area of vibration transmission can be reduced, and the impact sound is generated from the PC floor board 1 above. It becomes difficult to transmit to the beam 2, and the sound insulation performance is further improved. Further, when the two on-beam cushioning materials 3 are arranged at both ends of each short side, the support point interval of the on-beam cushioning material 3 becomes long, and the above-mentioned beam cushioning material 3 may be warped. However, since the above-mentioned beam cushioning material 3 is arranged so as not to be arranged at both ends, there is no possibility that the warp occurs.

  In the above example, the on-beam cushioning material 3 is provided on the flange of the beam 2 at an interval of 455 mm so that two pieces are equally arranged on each short side of each PC floor board 1. When the length of the short side of the PC floor board 1 is longer than 910 mm, for example, if the 455 mm interval is maintained, the above-mentioned cushioning material 3 on the beam is equally more than two on each short side of each PC floor board 1. Will be placed. Further, in the case where the short side length of the PC floor board 1 is, for example, 910 mm, the number of the cushioning materials 3 on the beam arranged on each PC floor board 1 may be three or more. Compared to expensive.

  When the fixing bracket 4 is used, when the PC floor plate 1 is fixed, the rising portion connecting the lower step surface 4a and the upper step surface 4b of the fixing bracket 4 is away from the edge surface of the flange of the beam 2. Therefore, contact between the fixing bracket 4 and the edge surface of the flange of the beam 2 can be made difficult, and an impact sound is transmitted from the fixing bracket 4 to the edge surface of the flange of the beam 2. Can be prevented.

  Further, since the soundproof mat 11 is laid on the PC floor plate 1 without an adhesive, the soundproof mat 11 is allowed to move up and down. As described above, when the vertical movement of the soundproof mat 11 is allowed, the cushioning property is improved and the sound insulation performance is improved. Of course, the structure in which the vertical movement of the soundproof mat 11 is allowed is a structure according to an embodiment, and an embodiment in which the soundproof mat 11 is fixed on the PC floor board 1 with an adhesive may be employed.

1 PC floor board (precast concrete floor board)
2 Beam 3 Buffer material on beam 4 Fixing bracket (fixing tool)
4a Lower step surface 4b Upper step surface 5 Bolt 11 Soundproof mat 12 Steel plate (base plate)
13 Particleboard (floor base material)
14 Floor finish board

Claims (6)

Precast concrete floorboards,
A shock absorber on the beam provided between the lower surface side of the precast concrete floor board and the upper surface side of the flange of the beam;
The precast concrete floor board is compressed to the beam while compressing the cushioning material on the beam by being pressed against the lower surface side of the flange by tightening the other fastener to the one fastener embedded in the lower surface of the precast concrete floor board. A fixing device to be fixed to,
A soundproof mat provided on the upper surface side of the precast concrete floorboard ;
The sound insulating floor structure is characterized in that a through hole for mounting the other fastener is not formed in the flange of the beam . 2. The sound insulating floor structure according to claim 1, wherein a base plate provided on the upper surface side of the soundproof mat , a floor base plate provided on the upper surface side of the base plate, and a screw for fixing the floor base plate to the base plate. Or a sound insulation floor structure comprising a nail .   The sound insulation floor structure according to claim 1 or 2, wherein the soundproof mat is placed on the precast concrete floor board in a non-adhesive state.   The sound insulation floor structure of any one of Claims 1-3 WHEREIN: The said buffer material on a beam is discontinuously provided under the edge part of each precast concrete floor board, The sound insulation floor structure characterized by the above-mentioned. 5. The sound insulation floor structure according to claim 4, wherein a plurality of the on-beam cushioning materials are arranged at equal intervals in a longitudinal direction of the flange of the beam so as not to be positioned at both ends of the edge portion. Floor structure.   The sound insulation floor structure according to any one of claims 1 to 5, wherein the fixture has an upper surface facing the lower surface of the precast concrete floor slab and a lower surface facing the lower surface of the flange, A sound insulating floor structure in which the upper and lower surface are formed non-parallel to each other.

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