JPH0886080A - Soundproof floor board - Google Patents

Abstract

PURPOSE: To ensure the soundproof performance and walking feeling of a floor board by a method wherein a soft sheet and a facing material are stuck successively on the surface of a substrate, in which tongues are formed to a butt end section, rear grooves are notched to the rear of the substrate, a fixed quantity of sinking by withstand load is set and a cushioning sheet is stuck. CONSTITUTION: A plurality of grooves 5 are formed from the rear side of a substrate 3, the rigidity of the substrate 3 is reduced, and a soft sheet 2 is pasted on the surface side, thus preventing the damage of a surface layer section. The veneer 1, thickness of which is thinner than the soft sheet 2 and flexural rigidity of which is smaller than the soft sheet 2, of a surface is used at that time, thus improving plasticity. Consequently, an impact applied to the surface of a soundproof floor board can be absorbed by the deformation of the whole sound-proof floor board, thus ensuring soundproof performance. The quantity of sinking by withstand load after the execution of the floor board is set in 2.0-3.5mm and the thickness of the sheet 4 at a value from 3.5mm to 6.0mm as the cushioning sheet 4.

Description

Detailed Description of the Invention

[0001]

This invention relates to floorboards.

[0002]

2. Description of the Related Art Conventionally, a decorative veneer is attached to the surface of a floorboard substrate, and a back groove is formed on the backside of the floorboard substrate to give the floorboard substrate plasticity. There is known a floor board which is provided with a cushioning material such as a non-woven fabric so as to provide soundproofing performance and which can be constructed by a bear which absorbs unevenness of the floor base.

[0003]

DISCLOSURE OF THE INVENTION In these floor boards,
Attempts have been made to improve the vibration absorption capacity by increasing the thickness of the cushioning material, but as the thickness of the cushioning material is increased, the floorboard surface after construction becomes very soft and gives a very walking feeling. It was not satisfactory, and there was a problem that the actual portion, which is the joint portion of the floorboard, was easily damaged, and it was not sufficiently satisfactory.

[0004]

SUMMARY OF THE INVENTION The present invention has been completed as a result of earnest studies to provide a floor board having excellent soundproofing performance and a good walking feeling in view of such problems. It came to. That is, according to the present invention, a soft sheet and a decorative material are sequentially attached to the surface of a substrate having a fruit at the mouth end, a plurality of back grooves are formed on the back surface of the substrate, and a buffer sheet is attached. In the soundproof floorboard, the soundproof floorboard is characterized in that it is thicker than the soft sheet, and that a cushioning sheet having a load sunk amount after the construction of the floorboard of 2.0 to 3.5 mm is attached.

[0005]

In the soundproof floorboard of the present invention, a plurality of grooves are formed from the back side of the substrate, the rigidity of the substrate is reduced, the surface side is rich in flexibility and has excellent strength against tensile load. Since the soft sheet having the above is attached, the bending rigidity of the soundproof floorboard of the present invention becomes a soundproof floorboard having a very high degree of plasticity.

Therefore, when an impact is applied to the surface of the soundproof floorboard, the entire soundproof floorboard is easily deformed, and an excellent vibration damping effect is exhibited. Furthermore, since a cushioning sheet having an excellent cushioning performance and a load-bearing sunk amount after construction of the floorboard of 2.0 to 3.5 mm is used, anxiety about walking feeling without deteriorating soundproofing performance. This makes it possible to prevent damage to the joint portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a sectional view of a soundproof floorboard 1 according to the present invention.
The single plate 1 is attached to the surface of the substrate via the soft sheet 2, and a plurality of grooves 5 are formed from the back surface of the substrate 3. Further, a buffer sheet 4 is attached to the back surface of the substrate 3.

As the substrate 3 of the present invention, for example, a wood board such as plywood, wood fiber board, wood shaving board, and single board laminated board can be used. The substrate 3 has a plurality of grooves 5 formed in parallel from at least the back surface side to the front surface side at least in a direction orthogonal to the length direction of the substrate. The grooves 5 reduce the rigidity of the wooden substrate 3 and are highly plastic. Become.

Further, by forming the grooves 5 in the direction parallel to the lengthwise direction and forming the grooves 5 in a lattice shape, the bending rigidity in the width direction of the substrate 3 can be similarly reduced, and the plasticity of the soundproof floor board can be improved. The soundproof floorboard is improved, and the entire soundproof floorboard is easily deformed when an impact is applied to the surface of the soundproof floorboard, which shows an excellent vibration damping effect.

The groove 5 can be formed by cutting from the back surface side of the substrate 3, and the deeper the depth, the more the rigidity of the substrate 3 can be reduced and the plasticity of the substrate increases. Become. Therefore, the groove 5 is formed so that the depth of the groove 5 is smaller than that of the soft sheet, and the surface layer is left to a thickness equal to or larger than the thickness of the veneer attached to the surface. The substrate 3 is formed to a depth such that the bending rigidity of the substrate 3 is smaller than the bending rigidity of the soft sheet 2.

Further, when a groove is formed to such a depth, if a substrate having a wood fiber direction is used as the substrate, the groove part is centered and orthogonal to the fiber direction during transportation or construction of the soundproof floorboard. When the soundproof floorboard is bent in the direction, the problem that the wood fiber is broken easily occurs. For this reason, it is preferable to use a homogeneous base material such as a wood fiber board which does not have a specific fiber direction.

Further, as shown in FIG. 2, in this substrate 3, a plurality of grooves 5 penetrating from the back surface side to the front surface side are formed in parallel at least in a direction orthogonal to the length direction of the floor board, and the board 5 is formed by the grooves 5. It is also possible to use a block divided into a large number of blocks. By thus dividing the substrate 3 into a large number of blocks, the bending rigidity in the length direction of the substrate 3 is almost lost in a span larger than the block size.

Further, by forming the grooves 5 in the direction parallel to the length direction and forming the grooves 5 in a lattice shape, the bending rigidity in the width direction of the substrate 3 is also lost, and therefore the laminated body is formed. Bending rigidity as a certain floor board is a soft sheet 2
The flexural rigidity is almost the same as that of No. 1, the plasticity of the floorboard is further improved, and the entire floorboard is easily deformed when an impact is applied to the surface of the floorboard, which is an excellent damping effect.

As the veneer 1, a natural veneer obtained by cutting natural wood, an artificial veneer, and a veneer sheet lined with a non-woven fabric, paper, or a synthetic resin sheet can be used, and an adhesive is used. It is formed by adhering to the surface of the soft sheet 2. Also, an overcoat layer may be provided on the surface of the single plate 1.

The veneer 1 has a thickness smaller than that of the soft sheet, and is preferably 0.1 to 1.0 mm. If you use a thicker piece of 1.0 mm or more, the veneer 1
Has a flexural rigidity greater than that of the soft sheet 2, and the plasticity of the soundproof floor plate is reduced, so that the vibration damping effect is reduced.

Furthermore, the hardness of the surface of the soundproofing floorboard increases, and, for example, the collision noise generated when the spoons made by all kinds of metals fall and collide with each other, and the soundproofing performance against light weight impact noise is deteriorated, which is not preferable.

As the soft sheet 2, a thermoplastic resin such as vinyl chloride resin, polyethylene resin or polypropylene resin can be used. For example, in the case of vinyl chloride resin, 10 parts of plasticizer are added to 100 parts of the resin. From part 2
Semi-hard vinyl chloride sheet or resin mixed with 0 parts 1
A soft vinyl chloride sheet in which 20 to 90 parts of a plasticizer is mixed with 00 parts can be used.

Further, other resins may be used as long as they have mechanical properties equivalent to those of the semi-rigid vinyl chloride sheet and the soft vinyl chloride sheet in bending rigidity, tensile strength and hardness (elasticity). . If the soft sheet 2 having a bending rigidity or hardness higher than these is used, the bending rigidity of the soundproof floor board becomes high, and the shock cannot be absorbed due to the deformation of the entire soundproof floor board.

On the other hand, if a material having a bending rigidity or hardness lower than these is used, it becomes difficult to control the size and the thickness regulation of the soft sheet 2, and it is not preferable because a uniform floor material cannot be supplied. .

Further, as the soft sheet 2 of the present invention, it is preferable to use one in which wood powder is mixed in the resin in an amount of 30 to 60% by weight. By using such a mixture of wood powder, the wood powder part exposed on the surface of the sheet wets the adhesive better than other resin parts, and the adhesive penetrates easily. The adhesion strength when bonding 1 and the substrate 3 is improved, and the problem of delamination can be prevented.

Further, while the resin alone has a large movement of shrinkage and expansion due to temperature change, by mixing wood powder which does not cause dimensional change due to temperature change at a rate of 30 to 60% by weight, the soft sheet 2 is obtained. It is possible to suppress the contraction and expansion with respect to the temperature change, and to prevent the problems such as the warpage of the soundproof floor boards and the push-up at the joint between the soundproof floor boards.

Further, as shown in FIG. 1, when forming the actual fruit for fitting on the four circumferential surfaces of the soundproof floor plate, it is preferable to form the fruit so that the soft sheet 2 is exposed on the surface side of the male fruit 6. With such a configuration, it is possible to prevent the generation of the squeak noise of the fitting portion by interposing the elastic soft sheet in the fitting portion with the female fruit.

Further, the cushioning sheet 4 has a cushioning function of absorbing impact energy by shrinking and deforming the impact applied to the surface of the soundproof floor board. For example, polyethylene resin, polypropylene resin, polyurethane resin. A synthetic resin foam such as polystyrene resin or a rubber foam can be used.

Further, it is preferable to use an open-cell foaming type, which does not cause an air spring phenomenon and can exhibit an excellent cushioning effect. Further, by adopting the open-cell type, it is possible to obtain an excellent performance in the restoring force when the contracted state is released by the long-term load.

Further, the cushioning sheet 4 having a load bearing sinking amount of 2.0 to 3.5 mm after construction of the floorboard is used. This load-bearing sinkage is 50
It means a value obtained by averaging the amount of sinking of the floorboard surface at four points 150 mm away from the loading plate to which the load is applied when a load of 80 kg is applied to the loading plate of mm. The cushioning sheet having such a load bearing sunk amount within the above range has a thickness of 6 mm thicker than the maximum load bearing sunk amount of 3.5 mm.
A sheet having a foaming ratio of 5 to 30 times in the following range can be used.

Further, it is preferable that an open-cell type foam sheet that has been uniformly foamed once is heat-molded so as not to break the foamed form as much as possible so that the thickness and the expansion ratio are within the ranges. In such a foamed sheet, a large number of spherical bubbles existed in a uniformly foamed state, but the spherical shape was crushed by heating and the voids were retained in the foamed sheet as a flat spherical shape. For example, even the same 20-fold foam, evenly foamed one, and once foamed up to 40-fold and heat-molded to 20-fold, have the same proportion of bubble portions existing in the same volume. The number of bubbles existing in the same volume is about twice that of the latter sheet. Furthermore, although the amount of resin that is the skeleton for holding bubbles is the same, the resin skeleton for holding twice the number of bubbles is thin, and the number of resin skeletons required to hold one bubble form can be grasped. If
The number is twice or more densely packed.
For this reason, the state is such that the double amount of the thin spring is used for cushioning, so that the cushioning function for absorbing impact becomes very excellent.

Further, in the foamed sheet heat-formed to reduce the thickness of the foamed sheet while keeping the flat foamed sheet in a flat state, air bubbles are largely flattened in the front and back portions of the foamed sheet near the heating portion. In the center of the foamed sheet far from the heating part, the bubbles are hardly flattened and remain spherical, and the volume of the bubbles is large.

That is, the volume of one bubble is flattened to the smallest in the front and back parts, and the bubble 1 gradually becomes closer to the center part.
It is molded in a state where the volume of each piece has increased. For this reason,
In practice, the springs described above have a large number of very thin springs near the front and back, and a small number of thick springs at the center.

That is, when the springs having different thicknesses are mixed, when the vibration is transmitted from the substrate, the small spring starts to contract first, and the large spring gradually contracts, so that a wide range of vibration can be absorbed. In addition, the smaller the spring is, the smaller the contraction width is, and if it contracts to a certain degree, further contraction does not occur. Therefore, the maximum sinking amount is smaller than that in an evenly large bubble (only thick spring) state. That is, it exhibits a very excellent buffering function in a range where the sinking amount is small.

Further, as shown in FIG. 1, by forming the convex portion 4a on at least the back surface of the cushioning sheet 4, when the convex portion 4a of the cushioning sheet 4 contracts, a space between the convex portion 4a and the convex portion 4a is formed. The space portion is secured as a place where the air in the bubbles of the convex portion 4a moves along with the contraction, and a floor material having more excellent soundproofing performance can be obtained.

Further, as shown in FIG. 3, by forming the convex portion 4b not only on the back surface side but also on the front surface side, the same function is exerted on the front surface side, and the soundproofing performance is further improved. . Further, as shown in FIG. 4, a laminated body composed of the synthetic resin foam 8 and the non-woven fabric 7 may be used as a buffer sheet. As the non-woven fabric 7, synthetic resin or natural fiber may be used. Preferably, the non-woven fabric 7 is attached to the back surface of the substrate 3 to increase the bending rigidity of the substrate 3 by its tensile strength. However, it is preferable that it has excellent stretchability in the plane direction.

Further, this non-woven fabric 7 absorbs a sufficient amount of adhesive in order to prevent an excessive amount of the adhesive from penetrating into the synthetic resin foam 8 when the buffer sheet 4 and the substrate 3 are bonded using the adhesive. Use the one with the ability. Specifically, when the synthetic fiber non-woven fabric 7 is used, the adhesive having a basis weight of 25 g / m ² or more is used to sufficiently absorb the adhesive and prevent it from permeating to the opposite side. By using such a laminated body of the non-woven fabric 7 and the synthetic resin foam 8 as the buffer sheet 4, the adhesive is hardened while permeating into the synthetic resin foam 8 in the manufacturing process, so that the foam The impregnated adhesive is used in a state where the synthetic resin foam 8 is compressed by the weight of the floor plates when the resulting floor plates are stacked and cured after the expansion and contraction function is reduced or the buffer sheets 4 are laminated and bonded. However, even after releasing from the compressed state, the synthetic resin foam 8 cannot return to its original thickness, and problems such as deterioration in soundproofing performance can be prevented. Such an effect is particularly remarkable when an open-cell type synthetic resin foam 8 is used.

[0033]

EFFECTS OF THE INVENTION The soundproof floorboard of the present invention has a plurality of grooves formed from the back surface side of the board to reduce the rigidity of the board, and moreover, the surface side thereof is rich in flexibility and resistant to pulling load. Since a soft sheet having excellent strength is attached, it is possible to prevent the surface layer portion from being damaged when it remains on the surface side of the groove portion of the floor board substrate.

Furthermore, since the surface veneer is thinner than the soft sheet and has a bending rigidity smaller than that of the soft sheet, and the bending rigidity of the cushioning sheet is small enough to be ignored, the soundproofing of the present invention is achieved. The flexural rigidity as a floor plate is equal to the sum of the flexural rigidity of the soft sheet and the rigidity of the surface layer portion left on the groove surface side of the substrate,
It will be a soundproof floorboard with very high flexibility.

For this reason, the impact applied to the surface of the soundproof floorboard can be absorbed by the deformation of the entire soundproof floorboard, and excellent soundproofing performance is exhibited. Further, when the groove is formed so as to penetrate all the way to the surface, the plasticity of the entire soundproof floor plate is further increased, and a further excellent vibration damping effect is exhibited.

Further, since the soft sheet having high flexibility is laminated on the lower surface of the veneer, the hardness of the surface of the soundproofing floor plate is also lowered, and when the surface of the soundproofing floor plate is deformed, the surface is deformed to give an impact. Can be absorbed. For this reason,
In particular, the soundproofing performance against light weight impact noise such as impact noise generated when the all-genuine spoons collide with each other becomes excellent.

Further, since a cushioning sheet having excellent cushioning performance and having a load-bearing sunk amount after the construction of the floor plate of 2.0 to 3.5 mm is used, the cushioning sheet can be walked without deteriorating the soundproofing performance. It is possible to prevent the feeling of concern and prevent the joint from being damaged.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a floorboard of the present invention, showing a case where a groove 5 of a substrate 3 does not penetrate the substrate 1.

FIG. 2 also shows a case where the groove 5 penetrates the substrate 3.

FIG. 3 also shows a case where a convex portion 4b is formed on the front surface side of the cushioning sheet 4.

FIG. 4 shows a cushioning sheet 4 made of non-woven fabric 7 and synthetic resin foam 8.
It shows the case of forming.

[Explanation of symbols]

1: Single plate, 2: Soft sheet, 3: Substrate, 4: Buffer sheet, 5: Groove, 6: Male, 7: Nonwoven fabric, 8: Synthetic resin foam.

Claims (2)

[Claims] 1. A surface of a substrate on which a fruit is formed at the mouth end,
A soft sheet and a decorative material are sequentially attached, and a plurality of back grooves are engraved on the back surface of the substrate, and a cushioning sheet is attached to the soundproof floorboard, which is thicker than the soft sheet,
Moreover, the load-bearing sunk amount after construction of the floorboard is 2.0-
A soundproof floorboard having a 3.5 mm cushioning sheet attached thereto. 2. The buffer sheet is thicker than 3.5 mm and 6.0.
The soundproof floor board according to claim 1, having a size of not more than mm.