JP2007191989A - Sound insulating floor structure of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively enhance sound insulating performance in a floor structure using exposed beams. <P>SOLUTION: This sound insulating floor structure is a sandwich structure formed by dividing a plurality of exposed beams 1 disposed almost parallel with one another and projected into a lower floor space 30, into upper beams 2 formed of wooden square bars, for instance, to support floor constitutive members such as floor backing members 11 and floor boards 12, and lower beams 3 formed of wooden square bars, for instance, to support ceiling constitutive members such as steel joists 16 and ceiling boards 17, and interposing vibration control members 4 between the upper beams 2 and the lower beams 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sound insulation floor structure in a building such as a detached house.

  Conventionally, in a detached house, the lower floor beam of the upper floor is exposed by projecting it into the lower floor space such as a living room, and a ceiling plate is directly attached to the floor beam of the upper floor to provide a ceiling surface of the lower floor space. A floor structure is known in which the lower floor space is expanded by raising the height and the interior of the lower floor space is enhanced.

  However, in such a floor structure, since the upper floor beam, so-called beam, is exposed in the lower floor space, if floor impact sound is generated on the floor of the upper floor, the floor impact sound is In addition to being radiated from the ceiling board to the lower floor space via the sash, it will be radiated directly from the express beam to the lower floor space.

  Therefore, the vibration propagation path between the floor board and the ceiling board is compared with the normal floor structure where the ceiling board is suspended and supported from the upper floor floor beam and the upper floor floor beam is not visible from the lower floor space. It is difficult to insulate, and it has been confirmed that the sound insulation performance is lowered.

  In general, in order to improve the sound insulation performance of the floor, measures such as increasing the weight of the floor board and the ceiling board are taken. However, when increasing the weight of floor boards and ceiling boards, it is necessary to change the design of the structure to support the floor boards and ceiling boards. Especially in wooden houses and lightweight steel houses, floor boards are required from the viewpoint of structural strength. And the weight of the ceiling panel cannot be increased unnecessarily.

  In addition, there is a method of improving the sound insulation performance by providing a double floor on the floor, but in this case, the floor level will rise and the indoor space will be narrowed, so it can be applied to general detached houses. Have difficulty.

  Therefore, a structure has been proposed in which a vibration isolating material is interposed between the floor plate and the floor beam so that the vibration of the floor plate is attenuated by the vibration isolating material (see, for example, Patent Document 1).

JP 2005-155288 A

  However, as described above, when a vibration isolator is interposed between the floor board and the floor beam, the floor board is likely to sink, which may lead to deterioration of walking feeling and generation of noise. was there.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to effectively enhance the sound insulation performance in a floor structure using an express beam without causing the above problems.

  In order to solve the above-described problems, the sound insulation floor structure of a building according to the present invention supports the floor constituent members 11 and 12 with a plurality of beams 1.. For example, the upper beam 2 made of wooden squares and the lower beam 3 made of, for example, wooden squares that support the ceiling components 16 and 17 are divided, and the vibration isolator is provided between the upper beam 2 and the lower beam 3. 4 is interposed.

  Further, between the adjacent upper beams 2..., Auxiliary beams 10... Made of, for example, wooden square members that support the floor constituent members 11 and 12 are arranged substantially in parallel with the upper beams 2. Further, the distance L between the central axes of the upper beam 2 and the auxiliary beam 10 is about 250 mm. Furthermore, the beam of the upper beam 2 and the auxiliary beam 10 are made substantially the same.

  Further, a floor base material 11 is mounted across the upper surfaces of the upper beams 2 and the auxiliary beams 10 and a ceiling plate 17 is mounted between the side surfaces of the lower beams 3 and.

  In the sound insulation floor structure according to the present invention, the use of a sandwich structure beam having an anti-vibration material interposed between the upper beam and the lower beam which are separated from each other, the floor component member side to the ceiling component member side The vibration propagating to the floor can be attenuated by the vibration-proof material, and the noise radiated to the lower floor space can be greatly reduced. The sound insulation performance can be effectively enhanced without causing the generation of sound.

  Moreover, since the auxiliary beam is arrange | positioned between adjacent upper beams and the reduction | decrease of the cross-sectional performance by dividing the express beam is compensated, required structural yield strength can be maintained favorable.

  Furthermore, by setting the distance between the central axes of the upper beam and the auxiliary beam to about 250 mm, it is possible to favorably support the floor constituent members such as the floor base material and the floor board, and the joists for supporting the floor base material. Can be abolished.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 show a sound insulation floor structure according to an embodiment of the present invention. In the figure, 1... Indicate the beams to be constructed on the upper floor in a wooden house, for example. Each representation beam 1 is divided into an upper beam 2 and a lower beam 3, and has a sandwich structure in which a vibration isolator 4 is interposed between the upper beam 2 and the lower beam 3.

  The upper beam 2 is made of, for example, a wooden square, and has a width of about 120 mm and a height of about 150 mm. The lower beam 3 is made of, for example, a wooden square, and has a width of about 120 mm and a height of about 170 mm. The anti-vibration material 4 is made of a band plate-like anti-vibration rubber, and has a width of about 120 mm and a thickness of about 10 mm.

  The upper beam 2 and the lower beam 3 are in a state in which both end portions thereof are separately connected to pillars and outer peripheral beams (not shown) and cut off from each other. The lower surface of the upper beam 2 and the upper surface of the lower beam 3 The anti-vibration material 4 is attached with an adhesive or the like. The anti-vibration material 4 may be simply sandwiched between the upper beam 2 and the lower beam 3 without being attached with an adhesive or the like. Further, it is not always necessary to provide the entire length of the upper beam 2 and the lower beam 3 in the longitudinal direction. For example, a plurality of vibration isolating materials 4 are spaced between the upper beam 2 and the lower beam 3 in the longitudinal direction. You may make it open and provide.

  The representation beams 1... Thus configured have a width of about 120 mm and a height of about 330 mm, and are arranged substantially parallel to each other so that the distance between their central axes is about 500 mm. ing.

  Reference numerals 10... Denote auxiliary beams arranged between the upper beams 2 and 2 of the adjacent display beams 1 and 1, respectively. The auxiliary beam 10 is made of, for example, a wooden square having approximately the same size as that of the upper beam 2 and has a width of about 120 mm and a height, that is, a beam length of about 150 mm. Etc. The distance L between the central axes of the auxiliary beam 10 and the upper beam 2 adjacent to each other is about 250 mm, and the upper surfaces of the auxiliary beams 10 and the upper beams 2 are positioned at the same height level. The auxiliary beams 10 are arranged substantially parallel to the upper beams 2.

Thus, by arranging the auxiliary beams 10... And increasing the number of beams, the necessary structural strength is ensured by compensating for the deterioration of the cross-sectional performance due to the division of the represented beams 1. In addition, the lower beam 3 in the shown beam 1 does not bear the force in the initial stage when the vertical force is applied, but the upper beam 2 deflects and interferes with the lower beam 3 By doing so, the force is borne and the beam strength is doubled.

  And the floor component is supported with respect to the upper beam 2 of the display beam 1 arranged in this way, and the auxiliary beam 10. That is, a floor base material 11 made of, for example, a substantially rectangular structural plywood is attached across the upper surfaces of the upper beam 2 of the representative beam 1 .. and the auxiliary beam 10.・ ・ Floor board 12 ・ ・ is laid on the top. Since the floor base material 11 is supported by the upper beams 2 and the auxiliary beams 10 that are arranged at a narrow interval of about 250 mm pitch, the joist usually provided to support the floor base material 11. Is abolished.

  Moreover, the ceiling structural member is supported with respect to the lower beams 3 of the representative beams 1. That is, a plurality of steel field edges 16 are passed between the side surfaces of the lower beams 3 of the representative beam 1 .. via the U-shaped holding frames 15, 15, and these steel field edges 16. A ceiling plate 17 made of, for example, a substantially square gypsum board is attached to the lower surface of. A heat insulating material 20 is filled between the floor base material 11 and the ceiling plate 17.

  In this construction state, the ceiling plate 17 is placed between the side surfaces of the lower beam 3 of the adjacent beam 1 and so on, so that the lower beam 3 of the beam 1 Projecting downward from the plate 17...

  In the above configuration, when an impact force is applied to the floor plate 12..., The floor plate 12... Vibrates due to the impact force, and the vibration is expressed through the floor base material 11. Propagate to

  At this time, the beam 1 has a sandwich structure in which the anti-vibration material 4 is sandwiched between the upper beam 2 and the lower beam 3 that are separated from each other, so that vibration propagating from the upper beam 2 to the lower beam 3 is generated. Damped by the vibration isolator 4. Therefore, the floor impact sound radiated from the lower beam 3 of the beam 1... And the ceiling plate 17 to the lower floor space 30 can be greatly reduced.

  Further, the auxiliary beams 10 are covered with the ceiling plate 17 and are cut off from the ceiling structural members such as the steel field edge 16 and the ceiling plate 17. The floor impact sound radiated from the auxiliary beams 10 .. rarely becomes a problem in the lower floor space 30. Thereby, although it is a floor structure using the representation beam 1 ..., sound insulation performance can be improved effectively.

  In addition, although the beam for ceiling suspension was separately provided in the beam 1 for the display, and a structure for attaching the ceiling constituent member to the beam for the ceiling hanging in a state of being separated from the beam 1 for the ceiling was examined, In this case, it is not possible to reduce the floor impact sound radiated directly from the beam 1... To the lower floor space, and to improve the sound insulation performance as in the case of using the beam 1. I could n’t.

  The present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention. For example, the size and the arrangement interval of the upper beam 2, the lower beam 3, and the auxiliary beam 10 in the representation beam 1 are not limited to the above embodiment, and may be appropriately changed according to the situation.

It is a longitudinal section of a sound insulation floor structure concerning one embodiment of this invention. It is the partial enlarged view similarly. It is a fracture perspective view of a sound insulation floor structure.

Explanation of symbols

  1 .... Render beam 2 .... Upper beam 3 .... Lower beam 4 .... Anti-vibration material 10 .... Auxiliary beam 11 .... Floor base material 12 .... Floor plate 16 .... Steel field edge , 17 ... Ceiling board, 30 ... Lower floor space

Claims (6)

A plurality of display beams (1), which are arranged substantially in parallel with each other and project into the lower floor space (30), an upper beam (2) for supporting the floor constituent members (11) (12) and a ceiling constituent member ( 16) It is divided into a lower beam (3) that supports (17), and a vibration isolator (4) is interposed between the upper beam (2) and the lower beam (3). Sound insulation floor structure of the building. The auxiliary beams (10) for supporting the floor constituent members (11) (12) are arranged between the adjacent upper beams (2), and substantially parallel to the upper beams (2). Sound insulation floor structure of the building described. The sound insulation floor structure of a building according to claim 2, wherein a distance (L) between central axes of the upper beam (2) and the auxiliary beam (10) is about 250 mm. The sound insulation floor structure of a building according to claim 2 or 3, wherein the beam of the upper beam (2) and the auxiliary beam (10) are substantially the same. A floor base material (11) is attached across the upper surfaces of the upper beams (2) and auxiliary beams (10), and a ceiling board is straddled between the side surfaces of the lower beams (3). The sound insulation floor structure of a building according to any one of claims 2 to 4, wherein (17) is attached. The sound insulation floor structure of a building according to any one of claims 2 to 5, wherein the upper beam (2), the lower beam (3), and the auxiliary beam (10) are made of wooden squares.