JP3030682B2 - Soundproof floorboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to floorboards.

[0002]

2. Description of the Related Art Conventionally, a decorative veneer is adhered to the surface of a floor plate substrate, and a back groove is formed on the back surface of the floor plate substrate to impart plasticity to the floor plate substrate. 2. Description of the Related Art Floorboards are known which provide soundproofing performance by adhering a cushioning material such as a nonwoven fabric, and which can be constructed with a shape that absorbs unevenness of a floor substrate.

[0003]

In these floorboards,
Attempts were made to increase the vibration absorption capacity by increasing the thickness of the cushioning material, but as the thickness of the cushioning material was increased, the floorboard surface after construction was very soft and a feeling of walking was very high. However, there were problems such as the fact that the actual portion, which is the joint portion of the floorboards, was easily damaged, and the like, which was not satisfactory.

[0004]

DISCLOSURE OF THE INVENTION In view of the above problems, the present invention has been intensively studied to provide a floor panel having excellent soundproofing performance and a good walking feeling, and as a result, the present invention has been completed. It has been reached. In other words, the present invention provides a method in which a soft sheet and a decorative material are sequentially adhered to the surface of a substrate having a fruit formed at a tip end thereof, a plurality of back grooves are formed on the back surface of the substrate, and a buffer sheet is attached. The attached soundproof floor panel is made of an open-cell synthetic resin foam or rubber foam that is thicker than the soft sheet and that is uniformly foamed and then heat molded to reduce the expansion ratio. A soundproof floor panel characterized in that a buffer sheet having a load sinking amount of 2.0 to 3.5 mm later is attached. "

[0005]

The sound-insulating floorboard of the present invention has a plurality of grooves formed from the back side of the substrate, the rigidity of the substrate is reduced, and the front surface has high flexibility and excellent strength against tensile loads. Since the flexible sheet having the following is adhered, the flexural rigidity of the soundproof floorboard of the present invention becomes a very soundproof soundproof floorboard.

[0006] Therefore, when an impact is applied to the surface of the soundproofing floorboard, the entire soundproofing floorboard is easily deformed, so that an excellent vibration damping effect is exhibited. Furthermore, since a sheet having excellent shock-absorbing performance and having a load sinking amount of 2.0 to 3.5 mm after construction of the floorboard is used, anxiety of walking without lowering soundproofing performance. This makes it possible to prevent the joint portion from being damaged.

[0007]

FIG. 1 shows an example of a sectional view of a soundproof floor panel 1 according to the present invention.
The veneer 1 is adhered to the surface of the substrate 3 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 adhered to the back surface of the substrate 3.

As the substrate 3 of the present invention, for example, a wood board such as a plywood, a wood fiber board, a wood chip board, a laminated veneer board can be used. The substrate 3 has a plurality of grooves 5 formed in parallel from at least the back surface to the front surface at least in a direction orthogonal to the length direction of the substrate. Become.

Further, by forming the grooves 5 in a direction parallel to the length direction and forming the grooves 5 in a lattice pattern, the bending rigidity in the width direction of the substrate 3 can be similarly reduced, and the plasticity of the soundproof floor panel can be improved. When the impact is applied to the surface of the sound-insulating floorboard, the entire sound-insulating floorboard is easily deformed, thereby exhibiting an excellent vibration-damping effect.

The groove 5 can be formed by cutting from the back surface side of the substrate 3. The deeper the groove, the more the rigidity of the substrate 3 can be reduced, and the greater the plasticity of the substrate. Become. For this reason, the depth of the groove 5 was smaller than the thickness of the soft sheet, and was formed to such a depth that the surface layer remained at a thickness not less than the thickness of the veneer adhered to the surface, and the groove 5 was formed. It is formed to a depth at which the bending rigidity of the substrate 3 is smaller than the bending rigidity of the soft sheet 2.

Further, in the case of forming a groove to such a depth, if a substrate having a wood fiber direction is used as a substrate, when the soundproof floorboard is transported or constructed, the groove portion is centered at right angles to the fiber direction. 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 substrate having no specific fiber direction, such as a wood fiber board, as the substrate.

As shown in FIG. 2, a plurality of grooves 5 penetrating from the back surface to the front surface of the substrate 3 are formed in parallel at least in a direction perpendicular to the longitudinal direction of the floor plate substrate. Divided into a number of blocks. By dividing the substrate 3 into a number of blocks in this manner, 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 also 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, so that the laminated body is not used. The flexural rigidity of a certain floor panel is a soft sheet 2
Is substantially equal to the flexural rigidity of the floorboard, the plasticity of the floorboard is further improved, and when an impact is applied to the floorboard surface, the entire floorboard is easily deformed, thus exhibiting an excellent vibration damping effect.

The veneer 1 may be a natural veneer obtained by cutting natural wood, an artificial veneer, or a veneer sheet lined with a nonwoven fabric, paper, or a synthetic resin sheet. It is formed by bonding to the surface of the soft sheet 2. Further, an overcoat layer can be provided on the surface of the veneer 1.

The veneer 1 has a thickness smaller than that of the soft sheet and preferably ranges from 0.1 to 1.0 mm. If a thick material of 1.0 mm or more is used,
Becomes greater than the bending rigidity of the soft sheet 2, and the plasticity of the soundproof floor plate is reduced, and the vibration damping effect is reduced.

Further, the hardness of the surface of the soundproof floor plate is increased, for example, the impact noise generated when a spoon made of all metals falls and collides becomes large, and the soundproof performance against light impact noise is lowered, which is not preferable.

As the soft sheet 2, a thermoplastic resin such as a vinyl chloride resin, a polyethylene resin and a polypropylene resin can be used. For example, in the case of a vinyl chloride resin, 10 parts of a plasticizer is added to 100 parts of the resin. Part 2
0 parts of semi-rigid vinyl chloride sheet or resin 1 mixed
A soft vinyl chloride sheet obtained by mixing 20 to 90 parts of a plasticizer with respect to 00 parts can be used.

In addition, other resins can 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 rigidity (elasticity). . If the flexible sheet 2 having a higher bending rigidity or hardness is used, the bending rigidity of the sound-insulating floorboard increases, and the impact cannot be absorbed by deformation of the entire sound-insulating floorboard.

On the other hand, if a material having a lower bending rigidity or hardness is used, it becomes difficult to control the size and thickness of the soft sheet 2, and it is not possible to supply a floor material of a uniform plan. .

Further, as the soft sheet 2 of the present invention, it is preferable to use a sheet obtained by mixing wood powder at a ratio of 30 to 60% by weight with respect to these resins. By using a mixture of wood flour in this way, the wood flour exposed on the surface of the sheet has better wettability of the adhesive than other resin parts and the adhesive easily penetrates. This improves the adhesion strength when bonding the substrate 1 and the substrate 3, and can prevent the problem of delamination.

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

Further, when fitting nuts are formed on the four peripheral surfaces of the soundproof floor plate as shown in FIG. 1, it is preferable to form the fruits so that the soft sheet 2 is exposed on the surface side of the male nuts 6. With such a configuration, an elastic soft sheet is interposed in the fitting portion with the female member, and it is possible to prevent generation of squeak noise in the fitting portion.

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

Furthermore, when the foaming form is of the open-cell type, an excellent spring effect can be exhibited without the occurrence of an air spring phenomenon. In addition, by using the open-cell type, excellent performance can be obtained with an excellent restoring force when released from a state contracted by a long-term load.

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

Further, a foamed sheet of an open-cell type, which has been foamed evenly once, is subjected to heat molding without breaking the foamed form as much as possible, and the thickness and the expansion ratio are used. Such a foamed sheet had a large number of spherical air bubbles in a state where it was foamed evenly, but because it was in a state where the voids in the foamed sheet were held as a flat spherical shape in which the spherical shape was crushed by heat molding. , For example, the same 2
Even if it is foamed 0 times, it should be 4 times
In the case of foaming up to 0 times and making it 20 times by heat molding, the number of bubbles existing in the same volume is about twice that of the latter sheet even if the proportion occupied by the air bubbles existing in the same volume is the same. It will be. Furthermore, although the amount of resin serving as a skeleton for holding bubbles is equal, the resin skeleton for holding twice the number of bubbles is thin, and the number of resin skeletons required for holding one bubble form can be taken as the number. If
The number is twice or more dense.
For this reason, since it becomes a state where it is buffered by a double amount of a thin spring, the buffer function of absorbing an impact becomes very excellent.

Further, the foamed sheet which is formed by heating to reduce the thickness of the foamed sheet while keeping the flat foamed sheet in a flat state, has a large flattening of the bubbles at the front and back portions of the foamed sheet near the heating section. In the central part of the foamed sheet far from the heating section, the air bubbles hardly flatten and remain spherical and the volume of the air bubbles is large.

That is, the volume of one bubble is flattened at the front and back portions to be smallest, and as the volume approaches the center portion, the bubble volume gradually decreases.
It is molded in a state in which the volume of the individual has increased. For this reason,
In actuality, the above-described spring has a large number of very thin springs near the front and back, and a small number of thick springs near the center.

That is, when the springs having different thicknesses coexist, when the vibration is transmitted from the substrate, the contraction of the small spring starts first and the large spring contracts gradually, so that a wide range of vibration can be absorbed. In addition, the smaller the spring, the smaller the contraction width is, and if it contracts to some extent, no further contraction occurs, so that the maximum sinking amount is smaller than that in the state of the uniformly large bubbles (only the thick spring). That is, a very good buffering function is exhibited in a small amount of sinking.

Further, as shown in FIG. 1, by forming a convex portion 4a on at least the back surface of the buffer sheet 4, when the convex portion 4a of the buffer sheet 4 contracts, a space between the convex portion 4a and the convex portion 4a is formed. Is secured as a place where the air in the air bubbles in the convex portion 4a moves with shrinkage, and a flooring 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 side but also on the front side, the same function is exerted on the front side, and further excellent soundproofing performance is obtained. . Further, as shown in FIG. 4, a laminate comprising the synthetic resin foam 8 and the nonwoven fabric 7 can be used as a buffer sheet. As the non-woven fabric 7, a non-woven fabric using a synthetic resin or a natural fiber can be used. Preferably, the non-woven fabric 7 is adhered to the back surface of the substrate 3 to increase the bending rigidity of the substrate 3 by its tensile strength. However, those having excellent elasticity in the plane direction are preferable.

The non-woven fabric 7 prevents the unnecessarily large amount of adhesive from penetrating into the synthetic resin foam 8 when the buffer sheet 4 and the substrate 3 are bonded to each other using an adhesive. Use something with the ability. Specifically, when the nonwoven fabric 7 of synthetic fiber is used, by using a nonwoven fabric having a basis weight of 25 g / m ² or more, the adhesive is sufficiently absorbed and does not penetrate into the opposite side. By using such a laminate of the nonwoven fabric 7 and the synthetic resin foam 8 as the buffer sheet 4, the adhesive is hardened while penetrating into the synthetic resin foam 8 in the manufacturing process, so that the foam After reducing the stretching function, or after laminating and bonding the buffer sheet 4, when the obtained floorboards are stacked and cured, the synthetic resin foam 8 is compressed by the weight of the floorboards. Is hardened, the synthetic resin foam 8 cannot return to the original thickness even after being released from the compressed state, and problems such as a reduction in soundproofing performance can be prevented. Such an effect is particularly remarkable when an open-cell synthetic resin foam 8 is used.

[0033]

According to the soundproofing floorboard of the present invention, a plurality of grooves are formed from the back side of the substrate to reduce the rigidity of the substrate. Since a soft sheet having excellent strength is adhered, the surface layer can be prevented from being damaged if it remains on the surface side of the groove portion of the floorboard substrate.

Further, since the veneer having a thickness smaller than that of the soft sheet and having a bending rigidity smaller than that of the soft sheet is used, and the bending rigidity of the cushioning sheet is almost negligible, the soundproofing of the present invention can be achieved. The bending stiffness as the floorboard is equal to the sum of the stiffness of the surface layer portion left on the groove surface side of the substrate and the bending stiffness of the soft sheet,
It becomes an extremely plastic soundproof floorboard.

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

Further, since a flexible sheet having high flexibility is laminated on the lower surface of the veneer, the hardness of the surface of the soundproofing floor is reduced, and the surface is deformed when an impact is applied to the surface of the soundproofing flooring. Can be absorbed. For this reason,
In particular, the soundproof performance against a light impact sound such as a collision sound generated when a spoon made of all kinds falls and collides is improved.

In addition, since a cushioning sheet having excellent cushioning performance and having a load sinking amount after construction of the floorboard of 2.0 to 3.5 mm is used, the walking is performed without deteriorating the soundproof performance. This makes it possible to eliminate the uneasiness of feeling and prevent the joint from being damaged.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a floor plate 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 a groove 5 penetrates a substrate 3;

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

FIG. 4 shows a buffer sheet 4 made of a nonwoven fabric 7 and a synthetic resin foam 8
It shows the case formed by.

[Explanation of symbols]

1: single plate, 2: soft sheet, 3: substrate, 4: buffer sheet, 5: groove, 6: male, 7: non-woven fabric, 8: synthetic resin foam.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04F 15/04 E04F 15/18

Claims (2)

(57) [Claims] 1. The method according to claim 1, wherein the surface of the substrate on which the fruit is formed at the opening is
The soft sheet and the decorative material are sequentially attached, and a plurality of back grooves are engraved on the back surface of the substrate, and the sound-insulating floor material to which the buffer sheet is attached is configured to be thicker than the soft sheet, and moreover, uniformly. It is made of an open-cell synthetic resin foam or rubber foam which has been subjected to heat molding to reduce the expansion ratio after foaming, and has a load sinking amount of 2.0 to less after construction of the floorboard.
A soundproof floor panel characterized in that a 3.5 mm buffer sheet is attached. 2. The soundproof floor panel according to claim 1, wherein the volume ratio of the bubbles per unit volume of the buffer sheet is smaller at the front and back portions than at the center portion.