JPH0355705Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a floating floor structure for reducing the propagation of floor impact noise such as the sound of jumping and walking on the upper floors to the lower floors in medium-to-high-rise residential buildings. It is about improvement.

(Prior art) Conventionally, as a technology to prevent the propagation of floor impact noise in mid-to-high-rise housing, etc. as mentioned above, glass wool mats (or rock wool mats) are laid on the subfloor of concrete floor slabs, etc. Floating floor constructions with rigid boards such as plywood or particle board and floor coverings are widely known. This floating floor structure utilizes the elasticity and restorability of glass wool pine (or rock wool pine) to reduce the impact force on the rigid surface board due to floor impact, and reduce the propagation of impact force to concrete floor slabs, etc. It is something to do.

(Problem to be solved by the invention) However, in recent years, propagated sound particularly on the upper and lower floors of mid-to-high-rise residences such as those mentioned above has become a problem, and there has been a need to further improve the sound insulation properties.

Therefore, in order to improve the sound insulation properties of the above-mentioned conventional floating floor structure, it is necessary to increase the thickness of the elastic mat made of glass wool mat or rock wool mat, or to increase the thickness of the elastic mat to a degree that does not significantly reduce its elasticity. It is conceivable to increase the absorption of the excitation force caused by impact by increasing the density.

However, increasing the thickness of the former increases the floor height, which is disadvantageous in terms of design, and also increases the reduction in thickness due to compressive deformation of the elastic mat made of glass wool mat or rock wool mat, making it vulnerable to local compression. A problem arises. In addition, because the surface of elastic mats made of glass wool mats or rock wool mats is porous, the vibrations of the floor covering material are easily transmitted laterally, and the vibrations continue indefinitely, and it takes a long time until the vibrations are attenuated. Since the propagated sound remains for a long time, there is a problem in that simply increasing the thickness cannot significantly reduce the impact transmitted energy. In other words, glass wool pine or rock wool pine has excellent elasticity but low viscosity, so when an impact force is applied to the surface of the flooring material, it immediately restores its shape after being deformed, and this deformation and restoration occurs through the rigid plate. It relies on vibrating the floor surface by acting on the floor covering. In addition, according to the latter method of increasing the density, although the vibration absorption property improves somewhat according to the mass law due to the increase in density, the glass wool mat or rock wool mat becomes hard due to the addition of a resin binder, etc. This has the disadvantage that the original shock absorption effect is reduced. For example, 96Kg/glass wool mat
m ³ , up to 120 kg/m ³ of rock wool mat is allowed as having the elasticity to be used as a floating floor, and there is a natural limit to its density, making it impossible to obtain a good sound insulation effect.

On the other hand, as a technique for preventing the propagation of vibrations on the surface of a flooring material, it is known to arrange a damping plate made of rubber or the like on the lower surface of the flooring material. Therefore, when this technology is used to place a damping plate directly on the surface of a porous elastic mat such as the above-mentioned glass wool mat, the elastic mat itself has enough rigidity to restrain the deformation and vibration of the damping material. Therefore, even if the vibration time of the floor finishing material can be shortened, it is difficult to reduce the vibration of the entire floor surface, and a sufficient combined effect cannot be obtained.

This invention was made in consideration of these points,
The purpose of this is not to place the vibration damping plate directly on the surface of an elastic mat made of glass wool mat or rock wool mat, as mentioned above.
By placing a soft fiberboard between the elastic pine and the damping plate, the reaction force caused by the deformation and restoration of the elastic pine is absorbed by the soft fiberboard, and at the same time, the damping plate is placed below the floor finishing material. It is sandwiched between the rigid board and the soft fiberboard to restrain its deformation and vibration.
Therefore, the purpose is to shorten the vibration time of the floor itself and reduce its amplitude, thereby significantly reducing the sound propagating to the lower floors.

[Means to solve the problem]

In order to achieve the above object, the solution of the present invention is to install an elastic mat made of glass wool pine or rock wool pine on the subfloor made of concrete, etc., and a wood fiber-based material that is resistant to compression and has suitable resilience. Specific gravity 0.2 with cushioning properties
~0.4 soft fiberboard and a damping plate with viscosity are sequentially laminated. Furthermore, it has a floating floor structure in which a floor finishing material is disposed on the upper surface via a rigid plate.

(Function) With the above configuration, in the present invention, a soft fiberboard with a specific gravity of 0.2 to 0.4 is arranged on an elastic mat made of glass wool mat or rock wool mat laid on the floor subfloor, so that the compression of the soft fiberboard is reduced. Due to the properties of the elastic mat having both strong and appropriate resilience and cushioning properties, deformation due to local compression of the surface of the elastic mat is prevented without reducing the excellent elasticity and resilience of the elastic mat, and the elastic mat's This will reduce the reaction force caused by deformation and restoration acting on the floor surface. Furthermore, deformation and distortion of the viscous damping plate arranged on the upper surface of the soft fiberboard is suppressed by the soft fiberboard, and good adhesion between the vibration damping plate and the rigid plate is maintained. Become. As a result, both the excellent cushioning properties of the elastic mat and the excellent vibration absorption properties of the damping plate are effectively utilized, and the vibrations of the flooring material are quickly stopped and the amplitude of the vibrations is greatly damped. The vibration becomes small and short.

Here, the above-mentioned soft fiberboard is JISA5905
Refers to wood fiberboard with a specific gravity of less than 0.4 as stipulated in The strength of the board is discovered through the intertwining of the two. At that time, the specific gravity is 0.2
If the specific gravity is less than 0.4, the voids between the fibers will become smaller and the resilience and elasticity will be lost, resulting in insufficient compression resistance. In terms of having both resilience and buffering properties, it is preferable that the specific gravity is in the range of 0.2 to 0.4.
Furthermore, due to the toughness of plant fibers such as wood fibers and the intertwining of fibers, this soft fiberboard is less durable than elastic pine, such as rock wool pine and glass wool pine, in which the fibers themselves are brittle and are integrated with adhesives. It is viscous, recovers slowly, and has a different kind of buffering effect. As a result, by laminating a viscous vibration damping plate on top of two types of mats (elastic mat and soft fiberboard) that have different buffering and restoring effects, we have found that when an impact force is applied to the floor, the floor The amplitude of the vibrations becomes smaller, the vibrations subside quickly, and the soundproofing effect for the downstairs area becomes greater.

In addition, the vibration damping plate having the above-mentioned viscosity is made of synthetic resin, rubber, asphalt, etc. mixed with high-density powder such as iron powder and an appropriate plasticizer, and has a specific gravity of 1.2 or more and a repulsion coefficient of 30% or less. It is preferable to obtain good vibration absorbing properties. In other words, lightweight materials with a specific gravity of less than 1.2 have a low ability to absorb impact energy;
Furthermore, if the coefficient of repulsion exceeds 30%, the elasticity will cause the sheet to recover quickly, and a repulsive force will act on the rigid plate, making it easier to vibrate the flooring. Furthermore, it is preferable to bond and integrate the elastic mat, the soft fiber board, and the vibration damping board from the viewpoint of ease of construction and handling.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a floating floor structure according to a basic embodiment of the present invention. In the figure, reference numeral 1 denotes a subfloor made of concrete, etc. On the subfloor 1, an elastic mat 2 made of glass wool mat or rock wool mat is disposed, and on the elastic mat 2, wood fibers are placed. A soft fiberboard 3 having a specific gravity of 0.2 to 0.4 as a main component is disposed, and a damping plate 4 having viscosity is further disposed on the soft fiberboard 2 and laminated in sequence. Further, on the upper surface of the damping plate 4, a rigid plate 5 made of particle board or plywood or the like is provided.
is stretched, and a floor finishing material 6 is placed on the rigid plate 5 to form a floating floor structure. still,
As the floor finishing material 6, a wooden floor material, a carpet, etc. are used as appropriate depending on the purpose of the room.

The soft fiberboard 3 is made of tough vegetable fibers such as wood fibers and has a specific gravity of 0.2 to 0.4.
It is strong in compression against impact force, and has both resilience and cushioning properties. If the specific gravity of the soft fiberboard 3 is less than 0.2, there will be too many voids and the compression resistance and resilience will be insufficient.
If it exceeds 0.4, the voids between the fibers will be small, and the resilience and
Since elasticity disappears, it is set between 0.2 and 0.4.

The vibration damping plate 4 is mainly made of thermoplastic resin such as vinyl chloride resin, rubber, asphalt, rubber asphalt compound, etc., and contains high-density powder such as iron powder, calcium carbonate, talc, etc. A material whose viscosity is increased by mixing an appropriate plasticizer such as an acid ester is used, and the excitation force caused by the vibration of the floor surface material (rigid board 5 or floor finishing material 6) is absorbed by internal deformation and viscous resistance. This suppresses the vibrations of the damping plate 4 itself and the floor surface material, and a material having a repulsion coefficient of 30% or less is used as its physical property. Further, it is desirable that the specific gravity is 1.2 or more and the areal density is 4Kg/m ² or more. That is,
This is because even if the specific gravity is high, if the areal density is low, the vibration of the rigid plate will not be sufficiently controlled and the vibration of the floor surface material will not be restrained.

The floating floor structure constructed in this way has an elastic mat 2 with excellent resilience and cushioning properties, a soft fiber board 3 with compressive strength and suitable resilience and cushioning properties, and vibration absorbing properties on the floor base 1. By sequentially laminating the vibration damping plates 4 with excellent vibration damping plates 4 and placing the floor finishing material 6 on the top surface with the rigid plate 5 interposed, the floor impact applied to the floor surface is absorbed by the deformation and restoration of the elastic mat 2. At the same time, the elastic mat 2 itself is deformed and
The repeated restoration is transmitted to the rigid board 5 in a relaxed state by the soft fiber board 3, and the elastic mat 2
The vibration of the floating floor due to its own recoil is reduced. In addition, the soft fiberboard 3 placed on the surface of the elastic mat 2 prevents deformation of the surface of the elastic mat 2 due to local compression without reducing the elasticity of the elastic mat 2, thereby preventing the thickness of the elastic mat 2 from decreasing. can.

Further, the vibration damping plate 4 absorbs the excitation force caused by the vibration of the floor surface material and suppresses the vibration of the floor surface material, and is also sandwiched between the soft fiber board 3 and the rigid board 5 to prevent the vibration of the floor surface material. The vibration of the damping plate 4 itself is restrained and suppressed, and the vibration damping plate 4 is maintained in a sufficiently close contact state with the rigid plate 4. Due to the above effects, the vibration of the floor surface material converges quickly and its amplitude attenuation increases, so the vibration of the entire floating floor becomes small and short, significantly reducing the sound propagated to the lower floors due to floor impact. can do. For example, the sound insulation performance can be reduced to L-45 (according to the Architectural Institute of Japan standard), compared to L-55 for conventional glass wool mats only.

2 and 3 show other embodiments of the invention. In this example, a laminated panel 7 in which an elastic mat 2, a soft fiberboard 3, and a damping plate 4 are integrated by adhesive is used, and a plurality of laminated panels 7 are placed on the floor base 1 in adjacent panels 7, 7. A certain space 8 between the side end faces of
A rigid plate 5 is placed thereon so that the upper surfaces of the laminated panels 7, 7, . . . are connected, and fixed with an adhesive or the like. In addition, the space part 8
The interval is set to about 1 to 5 times the thickness of the laminated panel 7. Furthermore, the surface of the damping plate 4 of the laminated panel 7 is provided with lattice grooves 9 and the like to form an uneven pattern, which increases the frictional resistance with the rigid plate and also improves the vibration absorbing property due to the deformation on the surface.

Therefore, in this example, the laminated panel 7 is constructed by bonding and integrating the elastic mat 2, the soft fiber board 3, and the damping plate 4, so that handling and transportation during construction and workability are simplified. becomes. Further, the space 8 does not necessarily need to be provided, and may be provided with an end face, but when an impact is applied to the laminated panel 7, the space 8 prevents the impact from propagating to the adjacent laminated panel 7. For example, according to impact tests using a tapping machine, the impact can be reduced by 2 to 3 dB compared to the case of tapping construction. Further, this space 8 can advantageously be used as a space for piping and wiring.

In FIG. 2, reference numeral 5' denotes a rigid plate made of plywood or the like which is disposed on the rigid plate 5 at different joint positions, and is attached to the rigid plate 5 by nailing.
Polymerized and fixed on the surface. This rigid plate 5, 5'
This double structure prevents the joints of the rigid plates 5 from appearing on the surface of the floor finishing material when only a soft flooring material such as a carpet 6' is installed as the floor finishing material. Also, 10 is the floor base 1 near the wall.
The upper and lower surfaces of the joist 10 are provided with cushioning materials 10a and 10a made of rubber, fiberboard, foam, etc., to prevent shocks transmitted from the joist 10. We are trying to reduce this. Furthermore, a moisture-proof sheet 11 may be placed between the elastic mat 2 and the floor base 1 to prevent moisture from the floor base 1 from coming into direct contact with the glass wool mat serving as the elastic mat 2. In this case, there is an advantage that the resilience of the elastic mat 2 can be maintained for a long period of time by preventing glass wool etc. from being affected by the alkaline components of the concrete slab.

Next, concretely, a 25 mm thick glass wool mat (actual density 64 kg/
m ³ ), a soft fiberboard with a specific gravity of 0.28 and a thickness of 9 mm, and a damping plate made of vinyl chloride resin mixed with iron powder and a plasticizer, with a repulsion coefficient of 20% and a specific gravity.
1.45 and 4 mm thick resin bodies are laminated in sequence, and on top of that, 20 mm thick particle board and 12 mm thick plywood are placed as rigid boards, and on top of that, 15 mm thick plywood is placed as a floor finishing material. Regarding the floating floor structure (example of the present invention) according to the present invention in which flooring materials are arranged, the vibration waveform of the floating floor due to the excitation force applied to the floor surface material was measured,
The results are shown in FIG. Similarly, the vibration waveforms measured for the case of using only the glass wool mat (conventional example) and the case of placing the damping plate directly on the glass wool mat (comparative example) are shown in Figures 5 and 6, respectively. . As shown in FIGS. 4 to 6, in the case of the example of the present invention (FIG. 4), the vibration subsides more quickly and the amplitude is attenuated to a greater extent than in the conventional example (FIG. 5). Furthermore, even in the case of the comparative example (FIG. 6), compared to the example of the present invention, the vibration time lasted about three times longer and the amplitude was larger, indicating that the vibration of the floor itself remained large. As a result, the sound insulation performance was L-55 for the conventional example and L-55 for the comparative example.
While it was only possible to obtain up to -50, it was confirmed that the example of the present invention could improve up to L-45.

(Effects of the invention) As explained above, according to the floating floor structure of the invention, the specific gravity is 0.2 to 0.4 soft fiberboard is used to prevent the elastic mat from thinning due to floor impact, and to prevent deformation and deformation of the elastic mat.
By reducing the reaction force caused by restoration and suppressing the deformation and distortion of the damping plate, the vibration of the entire floating floor is reduced, so the combined effect of the elastic pine and the damping plate is more than sufficient. As a result, sound propagation to the lower floors can be significantly reduced, and sound insulation can be significantly improved.

It goes without saying that the structure of the present invention can be applied not only to concrete floor slabs but also to wooden floorings.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, with FIG. 1 being a sectional view of one embodiment, and FIGS. 2 and 3 showing other embodiments, FIG. 2 being a sectional view, and FIG. is a perspective view of a laminated panel. FIGS. 4 to 6 are diagrams showing measurement results of vibration waveforms of the present invention example, the conventional example, and the comparative example, respectively. 1... Floor base, 2... Elastic pine, 3... Soft fiberboard, 4... Damping plate, 5, 5'... Rigid board, 6,
6'...Floor finishing material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An elastic mat made of glass wool pine or rock wool pine and a specific gravity mainly made of wood fiber on a subfloor made of concrete etc.
A floating floor structure in which 0.2 to 0.4 soft fiberboard and a damping plate with viscosity are sequentially laminated, and a floor finishing material is placed on the top surface with a rigid plate interposed therebetween. (2) The damping plate is made of synthetic resin, rubber, asphalt, etc. mixed with high-density powder such as iron powder and an appropriate plasticizer, and has a specific gravity of 1.2 or more and a repulsion coefficient of 30% or less. Floating floor structure described in claim (1) of the utility model registration. (3) The floating floor structure according to claim 1 or 2 of the utility model registration claim, in which an elastic mat, a soft fiberboard, and a vibration damping plate are integrally bonded.