JP2018016989A - Sound insulation floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulation floor structure capable of improving the sound insulation performance of a floor in a building structure having a cement flooring material.SOLUTION: A sound insulation floor structure in a building structure having a cement flooring material includes rib materials arranged in parallel on the upper side of the cement flooring material, buffer materials in a piece form that are disposed on the cement flooring material between the cement flooring material and the rib materials and stuck thereto at prescribed intervals in the longitudinal direction of the rib materials, and a floor substrate material disposed on the rib materials arranged in parallel, having a damping material at the underside.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sound insulation floor structure in a building structure using a cement floor material.

  Conventionally, in prefabricated apartment buildings that are building structures, cement-based flooring such as lightweight aerated concrete (ALC) and extruded cement board is laid on the beam, and wooden flooring is the finishing material on it. Has been laid as. In such a floor structure such as an apartment house, the influence of the sound of the upper floor on the lower floor is particularly significant, and a construction method using a combination of various materials has been taken in order to improve the sound insulation performance.

  There are light and heavy impact sounds for floor impact sounds, and there is room for improvement with floor finish materials (flooring materials) for light impact sounds. It depends on the material. For this reason, it is necessary to select and construct a flooring material having excellent sound insulation performance against heavy impact sound from the design stage.

  As a structure to mitigate heavy impact sound, cushioning material and ribs are provided on the cement-based flooring to improve sound insulation performance, and sand-like bodies are enclosed in the floor panel of extruded cement board to improve sound insulation performance. Although the structure etc. to be made are proposed, adoption may be difficult in terms of workability and cost.

  In particular, it is difficult to insulate sound in the low frequency range (250 Hz or less) of weight impact sound, and conventionally, sound insulation performance is ensured by increasing the thickness of the flooring and increasing the weight. However, when the weight of the flooring increases, it is necessary to enlarge the base steel frame that supports the floor, leading to an increase in cost and a reduction in the area of the living room.

  Also, in prefabricated houses, since the members are standardized, the thickness and module cannot be changed depending on the type of flooring, and the necessary sound insulation performance must be obtained within a predetermined range. If the member dimensions change depending on the sound insulation performance, the housing design must be changed according to the type of the member, and in prefabricated houses where workability and cost are reduced by standardization, the cost will increase significantly. End up.

  As a prior art of this type, there is a floor structure in which a rib is formed on the upper surface of a concrete plate, and a sound insulating material, a vibration damping mat, and a floor plate material are superposed on the rib as a vibration insulating material (for example, Patent Documents). 1).

  As another prior art, there is a sound insulation floor structure in which a plurality of ribs are provided at intervals on the upper surface of a cement board floor material, and the floor material is laid on the upper surface of the rib via a cushioning material (for example, a patent Reference 2). In this sound insulating floor structure, a rib space formed between the ribs opens at an end surface in the extending direction of the ribs, and floor impact sound is removed from the opening.

  As another prior art, the floor impact of the upper floor is caused by the first sound absorber that is mounted and fixed on the upper surface of the ceiling board, and the second sound absorber that is mounted and fixed on the upper surface of the ceiling base material. There is also a ceiling sound absorption structure that absorbs sound (see, for example, Patent Document 3).

JP2015-214804A Japanese Patent Application Laid-Open No. 2015-074964 JP 2015-148108 A

  However, since the ribs are formed on the concrete plate in the structure of Patent Document 1, the positions of the ribs are fixed, and the degree of freedom in arranging the sound insulating material and the flooring material is lowered. For this reason, the degree of freedom of design is also limited.

  Moreover, in the structure of the said patent document 2, although improvement in sound insulation performance can be aimed at by making the omission of air propagation, it may be difficult to obtain required sound insulation performance depending on the structure of a building structure.

  In addition, in the structure of the said patent document 3, since a heavy article will be laid on a ceiling board, the attachment intensity | strength to the ceiling base material of a ceiling board is needed. Moreover, long-term durability is also required because heavy objects are laid on the ceiling board.

  Then, an object of this invention is to provide the sound-insulating floor structure which can improve the sound-insulating performance of a floor in the building structure using the cement-type flooring.

  In order to achieve the above object, the present invention provides a sound insulation floor structure in a building structure using a cement-based flooring, wherein the rib material is arranged side by side on the upper surface side of the cement-based flooring, and the cement-based flooring. A piece of cushioning material disposed on the cement-based flooring between the flooring and the ribbed material, and pasted at a predetermined interval in the longitudinal direction of the ribbed material, and the ribbed material arranged side by side And a floor base material having a vibration damping material on the lower surface. The “cement-based flooring” in the specification and claims includes lightweight cellular concrete (ALC), extruded cement board, PC board, RC structure, and the like.

  With this configuration, since the piece-like cushioning material is stuck at a predetermined interval in the longitudinal direction of the rib material, it is possible to support a load by these cushioning materials and to form a space through which an impact sound is removed. And since the shock absorbing material is previously affixed on the rib material, the workability of the shock absorbing material and the rib material can be improved. In addition, the use of a damping material that is suitable for the desired sound insulation performance while reducing the propagation of impact sound by combining the damping material between the rib material and the floor base material. This makes it easy to design for sound insulation performance.

  Further, the floor base material may be configured to be divided and installed at a position of two or three intervals between the rib members arranged side by side. If comprised in this way, the division | segmentation edge part of a floor base material can be supported by a rib material, and can be fixed.

  Moreover, the said damping material may further be provided with the lower surface board stuck on the lower surface side between the said rib materials. If comprised in this way, propagation of the impact sound to a cement-type flooring material can further be reduced by the lower surface board stuck on the lower surface side of the damping material.

  A ceiling damping material supported by the ceiling base material may be installed on the top of the ceiling base material of the ceiling structure located below the cement-based floor material. If configured in this way, the combination of the cushioning material and damping material installed above the cement-based flooring and the damping material for ceiling installed below, without increasing the thickness from floor to ceiling, more Sound insulation performance can be improved effectively.

  Moreover, the said damping material for ceilings may be installed in the weight of the range of 2-25% with respect to the weight per square meter of the said cementitious flooring. If comprised in this way, by combining the damping material for ceilings of predetermined weight with respect to the weight of a cement-type flooring, the weight load of a ceiling base material can be made into an appropriate range, and sound insulation performance can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, in the building structure using a cement-type flooring, it becomes possible to improve a sound insulation performance by the reduction of the impact sound by a shock absorbing material, and the loss of an impact sound.

FIG. 1 is a cross-sectional view showing a sound insulating floor structure according to a first embodiment of the present invention. FIG. 2 is a perspective view of the sound insulation floor structure shown in FIG. FIG. 3 is a perspective view showing an example of a rib member in the sound insulating floor structure shown in FIG. FIG. 4 is a cross-sectional view showing a sound insulation floor structure according to a second embodiment of the present invention. FIG. 5 is a perspective view of the sound insulating floor structure shown in FIG. FIG. 6 is a perspective view showing an example of division of the floor base material in the sound insulating floor structure shown in FIG. FIG. 7 is a cross-sectional view showing a sound insulation floor structure according to a third embodiment of the present invention. FIG. 8 is a perspective view of the sound insulation floor structure shown in FIG. FIG. 9 is a cross-sectional view showing a sound insulation floor structure according to a fourth embodiment of the present invention. FIG. 10 is a graph showing the sound insulation effect of an example in one embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a sound insulation floor structure 1 of a building structure using the sound insulation floor rib material 20 will be described. An example in which an extruded cement board 10 is used as a cement floor material will be described. The concept of the up / down / left / right direction in the document of this specification and the claims shall be the same as the concept of the up / down / left / right direction in the state toward the sound insulation floor structure 1 shown in FIG.

(First embodiment)
Drawing 1 is a sectional view showing sound insulation floor structure 1 concerning a 1st embodiment. FIG. 2 is a perspective view of the sound insulation floor structure 1 shown in FIG. As shown in the drawing, in the sound insulation floor structure 1 according to the first embodiment, an extrusion-molded cement board 10 is attached to the upper part of a beam 11 to constitute a cement-based flooring.

  In the sound insulation floor structure 1, a plurality of cushioning materials 22 are installed at a predetermined interval on the upper surface of the extruded cement board 10 (floor panel), and a long rib material 21 is installed on the upper portion thereof. The rib members 21 are installed in parallel so as to extend in one direction (longitudinal direction of the extruded cement board 10) on the upper surface of the extruded cement board 10. The cushioning material 22 is adhered to the rib material 21, thereby forming the sound insulating floor rib material 20 (FIG. 3). The buffer material 22 and the rib material 21 are fixed to the floor material by screws or pins (not shown). A damping material 30 (damping sheet) is provided on the upper part of the rib member 21 arranged in parallel on the upper surface of the extruded cement board 10. A floor base material 31 is provided above the damping material 30, and a floor finishing material 32 is provided above the floor base material 31. The damping material 30 is attached to the lower surface of the floor base material 31.

  FIG. 3 is a perspective view showing an example of the rib member 20 in the sound insulating floor structure 1. In this embodiment, the sound-insulating floor rib material 20 is formed by sticking piece-shaped cushioning materials 22 to the lower surface of the rib material 20 at predetermined intervals in the longitudinal direction. As the cushioning material 22, the planar view is square in this embodiment, but it may be of a size that fits within the width of the rib material 21, and its shape may be a rectangle, a round shape, a rhombus, a polygon, etc. It is not limited. Further, the size may be appropriately set according to the target sound insulation performance. As in this embodiment, it is not necessary to attach the cushioning material 22 to the extruded cement board 10 at the construction site by preliminarily attaching the cushioning material 22 to the rib material 21 to form the sound insulating floor rib material 20. Workability can be improved.

  Examples of the buffer material 22 include natural rubber, synthetic natural rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, chlorosulfonated polyethylene rubber, acrylic rubber, urethane rubber, silicone rubber, and fluorine rubber. Polysulfide rubber and all these foams can be used. As the buffer material 22, one having a durometer type A hardness of 30 to 70 in JIS K6253 is used.

  As the rib member 21, a material obtained by processing a long piece of wood, cement slate board, or synthetic resin can be used.

Moreover, as the damping material 30, a sheet-like damping sheet having a thickness of 4 to 12 mm made of high specific gravity rubber, asphalt sheet, vinyl chloride (made of synthetic resin) can be used. As the damping material 30, a material in which a metal foil such as aluminum is sandwiched between these damping sheets can also be used. As the damping material 30, a material having a density of about 2.0 to 3.0 g / cm ³ can be used.

  Furthermore, as the floor base material 31, a particle board, plywood or the like can be used. As the floor finishing material 32, conventional materials such as wooden flooring materials and cushion flooring materials can be used. The damping material 30 and the floor base material 31 are fixed by screws (not shown) penetrating from the floor base material 31 to the rib material 21.

  According to the sound insulation floor structure 1 of this embodiment, since the impact sound between the extrusion-molded cement board 10 and the vibration damping material 30 passes through between the piece-like cushioning materials 22, it is possible to eliminate the impact sound in multiple directions. Can be done effectively. Thereby, an impact sound can be reduced effectively. In addition, the impact sound can be effectively reduced by the effect of reducing the impact sound by the damping material 30.

(Second Embodiment)
FIG. 4 is a cross-sectional view showing the sound insulating floor structure 2 according to the second embodiment. FIG. 5 is a perspective view of the sound insulating floor structure 2 shown in FIG. In addition, the same code | symbol is attached | subjected and demonstrated to the structure same as the sound insulation floor structure 1 of the said 1st Embodiment.

  As shown in the drawing, in the sound insulating floor structure 2 of this embodiment, a lower surface board 33 is adhered between the rib members 21 on the lower surface side of the vibration damping material 30. As the lower surface board 33, a cement slate board, a wood board, a synthetic resin board, a metal plate, or the like can be used. Other configurations are the same as those of the sound insulation floor structure 1 of the first embodiment, and a plurality of piece-like cushioning materials 22 are installed on the upper surface of the extrusion-molded cement board 10 at predetermined intervals. An elongated rib member 21 is provided on the upper portion 22. A damping material 30 is provided on the upper portion of the rib member 21, and a lower surface board 33 is adhered between the rib members 21 on the lower surface side of the damping material 30. A floor base material 31 is provided above the damping material 30, and a floor finishing material 32 is provided above the floor base material 31.

  6 is a perspective view showing an example of division of the floor base material 31 in the sound insulating floor structure 2 shown in FIG. As shown in the figure, the floor base material 31 may be divided at the positions of two or three intervals between the rib members 21 arranged side by side. If it does in this way, the division | segmentation edge part of the floor base material 31 can be supported by the rib material 21, and can be fixed. Moreover, by dividing in this way, even if the damping material 30 and the lower surface board 33 are attached to the floor base material 31 and the weight of the floor base material 31 becomes heavy, the individual weight of the divided floor base material 31 This makes it possible to carry out the transfer work efficiently.

  According to the sound insulation floor structure 2 of this embodiment, in addition to the effects of the sound insulation floor structure 1 of the first embodiment, the propagation of the impact sound is further performed by the lower surface board 33 attached to the lower surface side of the vibration damping material 30. Can be reduced. Therefore, the propagation of impact sound to the extruded cement board 10 can be further reduced and the sound insulation effect can be improved.

(Third embodiment)
FIG. 7 is a cross-sectional view showing the sound insulation floor structure 3 according to the third embodiment. FIG. 8 is a perspective view of the sound insulation floor structure 3 shown in FIG. In this embodiment, the ceiling structure 40 is combined with the sound insulating floor structure 2 of the second embodiment. The same components as those in the second embodiment will be described with the same reference numerals.

  As shown in the figure, the configuration of the upper portion of the extruded cement board 10 is the same as that of the second embodiment, and a plurality of piece-shaped cushioning materials 22 are provided on the upper surface of the extruded cement board 10 with a predetermined interval. An elongated rib member 21 is provided on the upper portion of the buffer member 22. A damping material 30 is provided on the upper portion of the rib member 21, and a lower surface board 33 is adhered between the rib members 21 on the lower surface side of the damping material 30. A floor base material 31 is provided above the damping material 30, and a floor finishing material 32 is provided above the floor base material 31.

  And the damping material 41 for ceilings is installed in the ceiling structure 40 of the lower floor located under the extrusion-molded cement board 10 of this sound-insulating floor structure 3. FIG. The damping material 41 for ceiling is provided on the upper surface of the ceiling base material 43 (field edge) on which the ceiling material 42 is provided. The damping material 41 for the ceiling is installed on the upper surface of the ceiling base material 43 (including the “ceiling base material receptacle”) so as to contact only the ceiling base material 43. For this reason, the load of the ceiling damping material 41 is not applied to the ceiling material 42.

  As the damping material 41 for ceilings, a resin bag, a nonwoven fabric bag, or the like is filled with a damping material. Damping materials include resin pellets, resin beads (foamed and unfoamed), sand, crushed stone, pumice, volcanic gravel, slag, metal pieces, ceramic crushed particles, cement product crushed particles (ALC, extruded cement) Board, slate board, etc.) can be used. The weight of the damping material 41 for the ceiling is preferably in the range of 2 to 25% with respect to the weight per square meter of the extruded cement board 10 (cement-based flooring).

  According to the sound insulation floor structure 3 of this embodiment, when an impact sound (vibration) is generated on the floor by the vibration damping material 41 for the ceiling, the sound is transmitted to the ceiling base material 43 in the downstairs, and the ceiling base material 43 vibrates. The energy is absorbed as energy for vibrating the damping material of the ceiling damping material 41. According to the sound insulation floor structure 3, in addition to the effect in the sound insulation floor structure 3 of the second embodiment, the vibration of the ceiling base material 43 due to the impact sound is reduced, so that the propagation of the impact sound can be reduced. Therefore, the sound insulation effect can be further improved.

  The ceiling damping material 41 of this embodiment is arranged on the entire surface so as to contact only the ceiling base material 43 across the ceiling material 42. For example, the ceiling damping material 41 is formed in a strip shape. You may make it install only in the upper part of the ceiling base material 43. FIG.

(Fourth embodiment)
FIG. 9 is a cross-sectional view showing the sound insulating floor structure 4 according to the fourth embodiment. In addition, the same code | symbol is attached | subjected and demonstrated to the same structure as the said 2nd Embodiment. This embodiment is an example of the sound insulating floor structure 4 in the reinforced concrete structure floor 50 (cement-based floor material) in the case of reforming.

  In the case of reforming in the reinforced concrete structure floor 50, the support legs 51 are installed so as to form a double floor, and the double floor board 52 is supported by the support legs 51. As the double floor board 52, a particle board, a plywood, etc. can be used.

  And the sound insulation floor structure 2 same as the said 2nd Embodiment is provided in the upper part of this double floor board 52. FIG. Specifically, a plurality of piece-like cushioning materials 22 are installed on the upper surface of the double floor plate 52 at a predetermined interval, and a long rib material 21 is provided on the cushioning material 22. . A damping material 30 is provided on the upper portion of the rib member 21, and a lower surface board 33 is adhered between the rib members 21 on the lower surface side of the damping material 30. A floor base material 31 is provided above the damping material 30, and a floor finishing material 32 is provided above the floor base material 31.

  Moreover, in this embodiment, the damping material 41 for ceilings is installed in the upper surface of the ceiling base material 43 (field edge) in the ceiling structure 40 of a lower floor similarly to the said 3rd Embodiment. Since the ceiling damping material 41 is the same as that of the third embodiment, description thereof is omitted.

  According to the sound insulation floor structure 4 of this embodiment, in the renovation building, in addition to the effect of the sound insulation floor structure 3 of the second embodiment, the ceiling foundation material 43 of the impact sound is used as in the third embodiment. Since vibration is reduced, the propagation of impact sound can be reduced. Therefore, the sound insulation floor structure 4 with a high sound insulation effect can be comprised.

(Sound insulation effect of the example)
FIG. 10 is a graph showing the sound insulation effect of the example. The vertical axis represents the floor impact sound level (dB), and the horizontal axis represents the octave band center frequency (Hz).

  The test body of the comparative example was attached to the upper part of the beam 11 with 8 sheets of extruded cement plates 10 having a width of 500 mm, a length of 2000 mm, and a thickness of 100 mm as a flooring material. As the buffer material 22 and the rib material 21, 24 buffer materials 22 made of synthetic rubber and having a hardness of 45 mm × 45 mm and a thickness of 10 mm on a wooden rib material 21 having a length of 2000 mm, a width of 70 mm, and a thickness of 20 mm. They were attached so that the longitudinal direction was equally spaced and the width direction was the central part.

  The rib material 21 to which the cushioning material 22 was attached was attached with 12 pins at a pitch of 250 mm parallel to the longitudinal direction of the extruded cement board 10 with the cushioning material 22 facing down. The pin was attached by providing a through-hole penetrating from the rib member 21 to the extruded cement plate 10 so as to penetrate the center portion of the cushioning material 22 every two pins. The floor impact sound level was measured using a particle board having a thickness of 15 mm as a floor base material 31 and a flooring material having a thickness of 12 mm as a floor finish 32 adhered thereon.

  On the other hand, in the test body of the example, eight extruded cement plates 10 having a width of 500 mm, a length of 2000 mm, and a thickness of 100 mm were attached to the upper portion of the beam 11 as a flooring material. As the buffer material 22 and the rib material 21, 24 buffer materials 22 made of synthetic rubber and having a hardness of 45 mm × 45 mm and a thickness of 10 mm on a wooden rib material 21 having a length of 2000 mm, a width of 70 mm, and a thickness of 20 mm. Sticked. The buffer material 22 was stuck so that the longitudinal direction of the rib material 21 was equidistant, and the width direction was a central part. The rib material 21 to which the cushioning material 22 was adhered was attached with 12 pins at a pitch of 250 mm parallel to the longitudinal direction of the extruded cement board 10 with the cushioning material 22 facing down. The pin was attached by providing a through-hole penetrating from the rib member 21 to the extruded cement plate 10 so as to penetrate the center portion of the cushioning material 22 every two pins.

And the asphalt sheet | seat (density 2.5g / cm < ³ >) of thickness 12mm as the damping material 30 (damping sheet) was provided on the rib material 21. FIG. A lower surface board 33 is attached to the vibration damping material 30 between the portions where the rib material 21 contacts. On this vibration damping material 30, a 15 mm thick particle board is pasted as a floor base material 31, and a flooring material 12 mm thick is pasted thereon as a floor finishing material 32. It was measured. The result of the comparative example is indicated by “□”, and the result of the example is indicated by “◯”.

  As the sound insulation effect of this embodiment, the floor impact sound level can be reduced by about 0.6 dB to about 2.2 dB in the low sound range as compared with the comparative example.

(Summary)
As described above, according to the sound insulating floor structures 1 to 4 described above, the extrusion cement board 10 and the control are made between the piece-shaped cushioning material 22 installed on the upper surface of the extrusion cement board 10 that is a cement floor material. The impact sound between the vibration member 30 can be effectively removed, and the impact sound can be effectively reduced. Moreover, the sound insulation floor structures 1 to 4 that can improve the sound insulation performance without increasing the thickness of the entire floor by combining the damping material can be configured. Furthermore, the vibration damping material can be easily designed in accordance with the sound insulation performance by combining with the desired sound insulation performance.

  Further, by combining the vibration damping material 41 for the ceiling, it is possible to further reduce the impact sound in the low frequency range and further improve the sound insulation performance.

  In the above-described embodiment, the extrusion-molded cement board 10 is described as an example of the cement-based floor material. However, the present invention is similarly applied to a cement-based floor material such as lightweight cellular concrete (ALC), a PC board, and an RC floor. The cement-based flooring is not limited to the above embodiment.

  Further, in the above-described embodiment, the sound insulating floor rib material 20 in which the buffer material 22 is bonded to the rib material 21 has been described as an example. However, the buffer material 22 and the rib material 21 are individually installed. The configurations of the buffer material 22 and the rib material 21 are not limited to the above embodiment.

  Further, in the above-described embodiment, the example in which the rib member 21 is arranged so as to extend in the longitudinal direction of the extruded cement board 10 has been described. However, the rib member 21 extends in a direction intersecting the longitudinal direction of the extruded cement board 10. However, the arrangement direction of the rib member 21 is not limited to the above embodiment.

  In addition, the above-described embodiment shows an example. Even if only the sound insulating floor structure on the upper surface side of the cement-based flooring material (lightweight aerated concrete (ALC), extrusion-molded cement board, PC board, RC structure) is used, A combination of the floor structure and the ceiling structure on the lower surface side of the cement-based flooring may be used, and various modifications are possible without departing from the spirit of the present invention, and the present invention is limited to the above-described embodiment. It is not a thing.

1-4 Sound insulation floor structure 10 Extruded cement board 11 Beam 20 Sound insulation floor rib material 21 Rib material 22 Buffer material 30 Damping material 31 Floor base material 32 Floor finishing material 33 Lower surface board 40 Ceiling structure 41 Ceiling damping material 42 Ceiling material 43 Ceiling base material 50 Reinforced concrete structure floor 51 Support leg 52 Double floor board

Claims (5)

A sound insulation floor structure in a building structure using a cement-based floor material,
A rib member arranged side by side on the upper surface side of the cement-based flooring;
Piece-shaped cushioning material disposed on the cement-based flooring material between the cement-based flooring material and the rib material, and pasted at predetermined intervals in the longitudinal direction of the rib material;
A sound insulation floor structure comprising: a floor base material installed on the rib material arranged side by side and having a vibration damping material on a lower surface thereof.   The sound-insulating floor structure according to claim 1, wherein the floor base material is configured to be divided and installed at a position of two or three intervals between the rib members arranged side by side. The vibration damping material further includes a lower surface board attached to the lower surface side between the rib members,
The sound insulation floor structure according to claim 1 or 2.   4. The ceiling damping material supported by the ceiling foundation material is provided on an upper part of the ceiling foundation material of the ceiling structure located below the cement-based flooring, according to claim 1. Sound insulation floor structure. The sound-insulating floor structure according to claim 4, wherein the ceiling damping material is installed with a weight in a range of 2 to 25% with respect to a weight per square meter of the cement-based flooring.

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