JPH0696902B2 - Soundproof flooring - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a house, and particularly to a soundproof flooring material for use in an upper floor portion, which prevents a solid sound from propagating downstairs due to a floor impact.

[Prior art and its problems]

The following publicly known examples can be given as soundproof flooring materials that are used in the upper part of the floor to prevent the solid sound from propagating downstairs due to the impact of the floor surface.

(A) Japanese Utility Model Publication No. 50-49915: The floor material of this known example has a soft high foam layer having a foaming ratio of 3 to 10 times and a foaming ratio of 1.5 to be embossed on the back surface of the floor plate body.
The soft low-foam layer of less than 3 times is sequentially laminated.

(B) Japanese Utility Model Publication No. 61-47339 In this known sound-insulating wooden flooring material, a sound-insulating foam body composed of a plurality of layers is attached to the entire lower surface of the wooden board, and foaming of the upper and lower layers adjacent to each other. The magnification is different from each other.

And in a composite of foams having different expansion ratios such as these known examples, it is a buffer material having low rigidity, and when an impact force is immediately received by the buffering effect, while the foam is deformed, Even if the buffering time becomes long and the momentum changes, that is, the temporal integration value of impulse and impact force are constant, the peak value of impact force and the impact natural frequency are reduced, and the impact input energy to the substrate is reduced. The sound and vibration caused by the impact are both reduced.

When these cushioning materials are compounded on the back surface of the flooring material, the shock absorbing effect absorbs energy by the expansion and contraction deformation of the cushioning material caused by the bending vibration of the flooring material.

However, the influence of the thickness ratio between the floor material and the cushioning material is high,
It is necessary to make the thickness ratio 2 to 3 times, the cushioning material becomes too thick, the deflection of the floor material itself is severe, the actual damage of the floor material occurs, and the walking becomes unstable. Is left.

[Means to solve the problem and its action]

The present invention has the following structure in order to solve the problems of the conventional soundproof flooring material as described above. That is, the soundproof flooring material of the present invention has an arbitrary makeup applied to its surface,
A damping material 5 consisting of a non-foamed sheet-like material with a plate-like restraining member 4 as a core on the back surface side of the floorboard body 1 on which the upper and lower solids 2 and 3 are formed on the edge of the wood The cushioning material 6 made of a foamed sheet is attached to the other surface of the floorboard body 1
The composite vibration damping material 7 having the same size as the width and length of the same is overhanged so that the surface of the vibration damping material 5 is in contact with the vibration damping material 5 and the width of the floor board main body 1 is formed in the width and length directions. In this case, the fitting concave groove 8 is fixedly formed.

Since the soundproof flooring material of the present invention has the above structure, the damping material 5 and the plate-shaped restraining material 4 absorb the impact and the vibration energy, and the cushioning material 6 absorbs the impact and the vibration energy. It has improved soundproofing effect.

[Explanation of Examples]

 Examples of the soundproof flooring material of the present invention will be described below.

In the drawings, reference numeral 1 is a floor board body, and a plate-like body such as plywood, fiber board, and particle board is used as a substrate, and pattern printing, veneer sticking, synthetic resin or synthetic resin foam decorative sheet sticking, decorative paper or synthetic An arbitrary make-up such as resin-impregnated decorative paper sticking is applied, and the upper edge is 2 on the two sides in the width and length directions orthogonal to the four edges of the wood edge, and the width and length directions orthogonal to the other wood edges. The bottom 3 is formed on the two sides of.

Plywood, fiberboard, paperboard, particle board, synthetic resin board, metal board, concrete board, on the back side of the floorboard body 1.
Compressive Young's modulus consisting of plate-shaped materials such as 500 to 150,000 kg /
a plate-like restraint member 4 cm ² and a core material, rubber on one side thereof, synthetic resin, sheet of asphalt, or Namariko (sound insulation of certain ones) a specific gravity of 4 or more heavies such as iron oxide Compressive Young's modulus consisting of non-foamed sheet material such as the above-mentioned sheet material mixed with
/ cm ² damping material 5, the other side of which is a rubber-based or synthetic resin-based foamed sheet material with a compressive Young's modulus of 0.05 to 50 kg / c
A composite damping material 7 having the same size as the width and length of the floorboard body 1 to which the m ² cushioning material 6 is attached is laminated. It is preferable that the foamed synthetic resin-based sheet-like material has perfectly circular internal bubbles. This is because the true circular shape has the highest resistance to compression.

Then, so that the surface of the vibration damping material 5 of the composite vibration damping material 7 contacts
In addition, the floorboard body 1 is fixed so as to jut out by an appropriate width on the upper side 2 formed in the width and length directions, and the fitting groove 8 is formed to obtain a soundproof flooring.

Since the composite damping material 7 laminated on the floorboard body 1 is provided with a viscoelastic damping material between the plate-shaped restraining material 4 having high rigidity and the floorboard body 1, it is possible to reduce the impact force applied to the floorboard body 1. Since the expansion and contraction due to bending vibration acts from the front surface side of the vibration damping material 5, the surface of the vibration damping material 5 extends in the plane direction, and the back surface side of the vibration damping material 5 is constrained by the plate-shaped constraining material 4. Shear deformation that does not move, such that it extends on the front surface side and does not move on the back surface side, occurs in the vibration damping material 5, and this shear deformation absorbs the impact force and vibration energy applied to the floorboard body 1.

Further, since the cushioning material 6 having elasticity is provided on the back surface side of the plate-like restraining material 4 having high rigidity, the impact force reduced and propagated by the vibration damping material 5 and the plate-like restraining material 4 is further absorbed. It is absorbed by the elastic deformation of 6. Therefore, in combination with the absorption of the impact force and the vibration energy by the plate-shaped restraining member 4 and the vibration damping member 5, the soundproof effect against solid sound becomes excellent.

As described above, the damping material 5 expands and contracts due to bending vibration due to the impact force of the floorboard body 1 from the front surface side, and is restrained by the plate-shaped restraining material 4 on the back surface side. Shear deformation occurs in the, and this shear deformation absorbs energy. Therefore, when the compressive Young's modulus is 50 kg / cm ² or less, the shearing deformation of the damping material 5 due to the bending generated in the floorboard body 1 is large, and the restraining force of the plate-like restraining material 4 almost restrains the bending of the floorboard body 1. Instead, the floor plate body 1 expands and contracts independently, which makes it difficult to absorb energy. On the contrary, if the damping Young's modulus of the vibration damping material 5 is 1000 kg / cm ² or more, the floorboard body 1
The shearing deformation of the damping material 5 due to the bending caused by the above is small, and the restraining force of the plate-like restraining member 4 directly acts on the floor plate body 1 as it is, so that the floor plate body 1 and the plate-like restraining member 4 are integrally bent. It is impossible to absorb energy.

The cushioning material 6 absorbs the impact energy of the propagating impact force by contracting and deforming itself, and when the compressive Young's modulus is 0.05 kg / cm ² or less, the contracting deformation can be facilitated but the impact energy is absorbed. However, if the compressive Young's modulus is 50 kg / cm ² or more, the rigidity becomes high and the shrinkage deformation is small so that energy cannot be absorbed sufficiently.

As described above, as the damping material 5 and the cushioning material 6 used in the floorboard body 1, a damping material having an appropriate shear deformation capacity and a damping material having an appropriate expansion and contraction ability are used. The shear deformation capacity of this damping material and the expansion and contraction capacity of the cushioning material are different functions, and when expressed in terms of a commonly used measure called the compressive Young's modulus,
What can be used as a damping material is 10 to 1000 kg / cm ² ,
The material that can be used as a cushioning material is 0.05 to 50 kg / cm ² .

Further, a non-foamed sheet-like material is used as the vibration damping material 5 constituting the composite damping material layer of the present invention, and a foamed sheet-like material is used as the cushioning material 6. This is because the foamed sheet material has a large number of bubbles inside, so when a shock is applied from the surface side,
This bubble part is compressed and crushed, and the volume of the entire sheet becomes smaller (shrinks) to absorb energy. Conversely, the compressed bubble part returns to its original volume due to the force to restore it and the resin's restoring force. This is because, in order to restore, the shock absorbing material absorbs the impact from the surface side by the expansion and contraction deformation, and thus has a preferable function. Further, when a load is applied from an unspecified direction, the non-foamed sheet-like material absorbs energy by deforming while trying to maintain the volume of the entire sheet. Therefore, when used as the damping material of the present invention, a pulling force in the plane direction acts on the front surface side and is restrained by the restraining material on the back surface side,
Energy can be absorbed by the overall deformation, that is, shear deformation, in which the film is stretched in the plane direction because it is pulled on the surface side, and at the same time, the overall thickness becomes thin. On the other hand, if a foamed sheet material is used as the damping material, it deforms with the deformation of the air bubbles while changing the overall volume.Therefore, pulling in the plane direction is independent of the binding force of the binding material on the back side. Deformation occurs only in the vicinity of the surface side where the force is applied, which is almost the same as the state in which the floorboard body is deformed alone, which is not preferable because the function as the damping material in the present invention cannot be fulfilled.

Since the cushioning material 6 is provided in the lowermost layer of the soundproof flooring material, when the construction is performed on a concrete foundation or the like, unevenness of the foundationing material is absorbed by the cushioning material itself, which may cause a difference in flooring material. Absent.

Further, the floorboard body 1 has upper and lower solids 2 and 3 formed on the edge of the wood by phase-shifting processing, and the composite damping material 7 is fixed so as to overhang on the upper solid 2 side by an appropriate width, and fitted. Since the groove 8 is formed, the butt construction can be easily performed by fitting the solid 3 of the other floor material into the groove. Furthermore, since the protrusion 2 is appropriately extended on the side, nailing is easily performed on the extended portion to improve workability, and the abutting portion of the floor plate body 1 and the composite damping material 7 is different. For,
The soundproofing effect of each floor material, which is observed when the butted portion passes through, is not divided or reduced.

For reference, the solid sound prevention material will be described.

Solid sound prevention material (A) Anti-vibration material A material that mainly prevents sound from propagating vibrations by shielding sound, and usually adds a heavy substance to the material that constitutes the propagation system to increase the specific gravity of the material. .

(B) Damping material By absorbing the energy of vibration, that is, by converting it into heat energy, resonance amplification of the natural vibration system is suppressed, distance attenuation of vibration propagation is increased, and energy accumulation of diffusion diaphragm is prevented. It is a material to do.

(1) Centralized damping material A typical example is a resistance type damper used in parallel or in series with a spring material in a natural vibration system composed of a weight and a spring.

(2) Distributed damping material In general, a viscoelastic material having a large internal loss is formed into a sheet and is used by adhering it to one side of the vibration-damped base material or the middle of the base material. In some cases, the air flow resistance of a sound absorbing material is used. Both of them dampen the bending vibration of the plate in the mid-high range.

(3) General characteristics of damping material Most of the materials are rubber-based, plastic-based, and asphalt-based compound materials, all of which utilize viscoelasticity near the glass transition point.

It is important that the damping material have sufficient loss above all else, but in order to bear the force and obtain a large energy loss, it must have an appropriate Young's modulus for the base material side. It is also important.

Next, the constrained vibration damping material used in the present invention will be described.

Restraint type damping material A viscoelastic material is used to restrain the expansion and contraction due to bending vibration of the substrate on the opposite side with a damping material in which a viscoelastic layer is adhered to one side of the substrate and a constraint layer with a high Young's modulus is provided on the surface. The energy is absorbed by the shear deformation generated in the layer.

The damping characteristics are determined by the elastic coefficient and thickness of each layer and the loss coefficient of the viscoelastic layer.

It is a natural result that the closer the compressive rigidity of the constraining layer to the substrate is, the larger the overall loss coefficient is because the shear deformation of the viscoelastic material is larger. The difference is that the thickness of the viscoelastic material is almost irrelevant, and sufficient performance is obtained even at 0.1 mm or less.

FIG. 3 schematically illustrates the use condition classification of the damping material, where 1 is a substrate, 2 is a vibration damping material, and 3 is a restraining material.

〔effect〕

(A) On the back surface of the floorboard main body of the present invention, a damping material made of a non-foamed sheet material that absorbs shock by shear deformation, a highly rigid plate-like restraint material, and a foam sheet shape that absorbs shock by shrinkage deformation. Since the cushioning material consisting of objects is laminated in this order, the impact force applied to the floorboard body is reduced by the energy absorption due to the combined action of the shear deformation by the damping material and the restraining force by the plate-shaped restraining material. The propagating impact force is further absorbed by the contractive deformation of the cushioning material. Therefore, the effects of the plate-shaped restraining material, the damping material, and the cushioning material are combined to provide an excellent soundproofing effect against solid sound.

(B) Since the cushioning material 6 is provided in the lowermost layer of the soundproof flooring material, when the construction is performed on a concrete foundation, the unevenness of the foundationing material itself is absorbed by the cushioning material itself. It never happens.

(C) The floorboard main body 1 has upper and lower solids 2 and 3 formed on the edge of the wood by phase-shifting processing, and the composite damping material 7 is fixed to the upper solid 2 side so as to overhang by an appropriate width, and fitted. Since the mating concave groove 8 is formed, the butt construction can be facilitated by fitting the solid 3 of the other floor material into the concave groove. Furthermore, since the protrusion 2 is appropriately extended on the side, nailing is easily performed on the extended portion to improve workability, and the abutting portion of the floor plate body 1 and the composite damping material 7 is different. Therefore, the soundproof effect of each floor material, which is observed when the butted portion passes through, is not divided or reduced.

[Brief description of drawings]

 Fig. 1: Cross-sectional view of the soundproofing flooring material of the present invention, Fig. 2: Same perspective view thereof, Fig. 3: Explanatory drawing of classification of conditions of use of damping material, 1: Floor plate body, 2: Upper solid, 3: Lower Actually, 4: Plate restraint material, 5: Damping material, 6: Damping material, 7: Composite damping material, 8: Fitting groove.

Claims (1)

[Claims] 1. A plate-like restraint member 4 is used as a core on the back surface side of a floorboard main body 1 on the surface of which an optional make-up is applied and whose upper edge 2 and lower edge 3 are formed by phase-shifting processing, and one side of which is a core. A damping material 5 made of a non-foamed sheet material, and a cushioning material 6 made of a foamed sheet material on the other surface of the floor board body 1 and laminated with a composite damping material 7 of the same size as the length, The composite damping material 7 is fixed so that the damping material 5 is in contact with the surface of the floorboard body 1 so as to jut out by an appropriate width on the side of the upper body 2 formed in the width and length directions of the floorboard body 1, and the fitting groove 8 is formed. A soundproof flooring material characterized by being formed.