JPH0868191A - Floor plate - Google Patents

Abstract

PURPOSE: To reduce the bending rigidity of the floor base plate as much as possible, and to easily deform the whole of the floor so as to show the excellent damping work when an impact is applied to the surface of the floor. CONSTITUTION: A soft synthetic resin sheet 2 is attached to the surface of a wood base plate 3, and plural grooves are formed in the wood base plate 3 at a depth for passing from the back surface side of the wood base plate 3 to the soft synthetic resin sheet 2. A veneer 1 at a thickness smaller than the thickness of the soft synthetic resin sheet 2 is attached to the surface of the resin sheet 2, and a buffer material 4 is attached to the back surface of the wood base plate 3. Wood powder at 30-60% by weight is desirably mixed in the soft synthetic resin sheet 2.

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 front surface of a wooden board, and a back groove is formed on the back surface of the board to impart plasticity to the board. There is known a floor board which is provided with a sound-proofing property by adhering a cushioning material such as, and which can be constructed in a state where the unevenness of the floor base is absorbed.

[0003]

However, the groove formed in the wooden board can be formed at least to a depth where two veneers on the surface are left when the board is a 5-ply plywood board, for example. There wasn't. This is because when a groove is formed deeper, the bending strength of the remaining part on the groove surface side connecting the floor plates becomes very low, and the groove surface remains on the surface side due to an impact from the surface during or after construction. This is because the problem that the broken part is easily broken occurs.

Therefore, the groove can be formed only in a state where the substrate has a certain bending rigidity, and the substrate cannot have a sufficient vibration damping effect. Therefore, when a shock is applied to the substrate surface. In addition, the substrate is apt to vibrate, and even with the cushioning material on the back surface side, the vibration cannot be sufficiently absorbed and is transmitted to the downstairs.

In order to solve this problem, it has been attempted to increase the vibration absorbing capacity by increasing the thickness of the cushioning material. However, as the thickness of the cushioning material increases, the load on the floorboard increases. There is a problem that the floorboard sinks when it acts and the walking feeling deteriorates, and the floorboard sinks when a heavy object is placed, which actually causes damage to the floorboard joints, etc. I was not satisfied.

[0006]

SUMMARY OF THE INVENTION In view of the above problems, the present invention has conducted extensive studies to reduce the bending rigidity of a wooden board as much as possible and to provide a floor board having a damping effect on the entire floor board. As a result, it was completed.

That is, according to the present invention, a soft synthetic resin sheet is attached to the front surface of a wooden board, and a plurality of grooves are formed from the back surface side of the wooden board to a depth that almost penetrates the soft synthetic resin sheet. The floor board is characterized in that a veneer having a thickness smaller than that of the synthetic resin sheet is attached to the front surface of the synthetic resin sheet, and a cushioning material is attached to the back surface of the wooden substrate.

As the wood board of the flooring material of the present invention, wood board such as plywood, wood fiber board, wood shaving board, and single board laminated board can be used.

A plurality of grooves are formed on the wooden substrate so as to substantially penetrate from the back side to the front side. Preferably, a plurality of the grooves are formed in parallel at least in a direction orthogonal to the length direction of the wooden board, and the wooden board is divided into a large number of blocks by the grooves. By thus dividing the wooden board into a large number of blocks, the bending rigidity in the length direction of the wooden board is almost lost in a span larger than the block size. Further, by forming the grooves in the direction parallel to the length direction and forming the grooves in a lattice shape, the bending rigidity in the width direction of the wooden substrate is also lost.

Since the flexural rigidity of the wooden board is substantially lost through the formation of the grooves in this way, the flexural rigidity of the floor board, which is a laminate, is the same as that of the soft synthetic resin sheet attached to the surface of the wood board. It has almost the same flexural rigidity as that of the floor plate, the plasticity of the floor plate is improved, and the entire floor plate is easily deformed when an impact is applied to the surface of the floor plate, resulting in an extremely excellent vibration damping effect.

The groove can be formed by cutting from the back surface side of the wooden substrate with the soft synthetic resin sheet and the wooden substrate adhered to each other. Ideally, the depth of the groove should be such that it penetrates the wood substrate and does not cut the soft synthetic resin sheet 2, but it is extremely difficult to adjust the cutting depth in practice. , Even if the groove is formed with a depth where the front side of the wooden board is slightly left or a depth where the back side of the soft synthetic resin sheet is slightly cut, the flexural rigidity as a floor board can be almost the same. There is no problem because it is done.

As the veneer, a natural veneer obtained by cutting natural wood, an artificial veneer, and a veneer sheet lined with a non-woven cloth, paper, or a synthetic resin sheet can be used. Adhered to the sheet surface. An overcoat layer may be provided on the surface of the veneer. The veneer is thinner than the soft synthetic resin sheet, and preferably has a thickness of 0.1 to 10.
Use one with a range of 1.0 mm. If a thick sheet having a thickness of 1.0 mm or more is used, the bending rigidity of the veneer plate becomes larger than the bending rigidity of the soft synthetic resin sheet, and the plasticity of the floor plate is reduced to reduce the vibration damping effect. Furthermore, since the hardness of the surface of the floor plate increases, the collision noise generated when the metal spoon falls and collides, for example, and the soundproofing performance against light weight impact noise is deteriorated, which is not preferable.

As the soft synthetic resin sheet, 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, the plasticizer is 10 parts per 100 parts of the resin. From 20 to 20 parts of semi-rigid vinyl chloride or resin 100
It is possible to use soft vinyl chloride with 20 to 90 parts of plasticizer mixed per part. Further, other resins may be used as long as they have mechanical properties equivalent to those of the semi-rigid vinyl chloride and soft vinyl chloride in flexural rigidity, tensile strength and hardness (elasticity). If a flexible synthetic resin sheet having a flexural rigidity or hardness higher than these is used, the flexural rigidity of the floor board becomes high, and the shock cannot be absorbed due to the deformation of the entire floor board. On the other hand, use of a material having a bending rigidity or hardness lower than these makes it difficult to control the size and thickness regulation of the soft synthetic resin sheet, and it is not preferable because a floor material having a uniform standard cannot be supplied.

Further, as the soft synthetic resin sheet of the present invention, it is particularly preferable to use a sheet in which wood powder is mixed in the resin in an amount of 30 to 60% by weight. By using a material mixed with wood powder in this way, the wood powder part exposed on the sheet surface wets the adhesive better than other resin parts, and the adhesive easily penetrates. The adhesion strength at the time of adhering the sheet to the surface veneer and the wooden substrate 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 with respect to temperature change in a proportion of 30 to 60% by weight, the temperature of the soft synthetic resin sheet can be improved. It is possible to suppress contraction and expansion due to changes, and it is possible to prevent problems such as warpage of the floor boards and push-up at the joint between the floor boards.

On the four peripheral surfaces of the floor plate, the actual fruit for fitting can be processed and formed. In this case, it is preferable to form the fruit so that the soft synthetic resin sheet is exposed on the surface side of the male fruit. With such a configuration, the soft synthetic resin sheet having elasticity is interposed in the mating portion with the female fruit, and it is possible to prevent the squeaking noise of the mating portion from occurring.
At the same time, it also serves as a connecting material between males and females divided by the groove, and damage to the males can be prevented.

The cushioning material attached to the back surface of the wooden substrate has a cushioning function of absorbing impact energy by shrinking and deforming the impact applied to the surface of the floorboard, and is made of, for example, polyethylene resin or polypropylene resin. A synthetic resin foam or a rubber foam such as a polyurethane resin or a polystyrene resin can be preferably used.
It is preferable to use an open-cell foaming type without causing an air spring phenomenon and to exhibit an excellent cushioning effect. Also, by making it an open cell type,
Excellent performance is also obtained in the restoring force when released from the contracted state by a long-term load.

By forming the convex portion on at least the back surface of the cushioning material, when the convex portion of the cushioning material shrinks, the space between the convex portions and the air in the bubbles of the convex portion shrinks. It will be secured as a place to move with, and a floor material with more excellent soundproofing performance can be obtained. Furthermore, by forming the convex portion not only on the back surface side but also on the front surface side, the same function is exhibited on the front surface side, and the sound insulation performance is further improved.

As the cushioning material, a laminated body composed of the synthetic resin foam and a non-woven fabric can be used. As the non-woven fabric, it is possible to use those using synthetic fibers or natural fibers, preferably by bonding the non-woven fabric to the back surface of the wooden substrate, without increasing the bending rigidity of the wooden substrate by its tensile strength, Those having an excellent expansion and contraction ability in the plane direction are preferable.

Further, this non-woven fabric absorbs a sufficient amount of adhesive in order to prevent an excessive amount of the adhesive from penetrating into the synthetic resin foam when the cushioning material and the wooden substrate are bonded using the adhesive. Use the one with the ability. Specifically, when a synthetic fiber non-woven fabric is used, the adhesive having a basis weight of 25 g / m ² or more sufficiently absorbs the adhesive and does not penetrate into the opposite side. By using a laminate of such a non-woven fabric and a synthetic resin foam as a cushioning material, the adhesive may be hardened while permeating into the synthetic resin foam in the manufacturing process to reduce the expansion and contraction function of the foam, Further, when the flooring material obtained after laminating and bonding the cushioning material is piled up and cured, the impregnated adhesive agent is hardened in the state where the synthetic resin foam is compressed by the weight of the flooring material, and the compressed state Even after the release, the synthetic resin foam 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 is used.

[0020]

In the floorboard of the present invention, a plurality of grooves are formed to a depth almost penetrating from the back side of the wooden board to the soft synthetic resin sheet, and the rigidity of the wooden board is substantially completely lost. The flexural rigidity of the floorboard depends on the flexural rigidity of the surface veneer, the soft synthetic resin sheet and the cushioning material. Furthermore, since the thickness of the veneer on the surface is smaller than that of the soft synthetic resin sheet, and the bending rigidity of the veneer is smaller than that of the soft synthetic resin sheet, the bending rigidity of the cushioning material is small enough to be ignored. The flexural rigidity as is almost the same as the flexural rigidity of the soft synthetic resin sheet, resulting in a floorboard having a very high degree of plasticity. For this reason, when an impact is applied to the surface of the floorboard, the entire floorboard is easily deformed, and an extremely excellent vibration damping effect is exhibited.

Further, by using the soft synthetic resin sheet mixed with wood powder, the adhesive of the wood powder exposed on the surface is well wetted and the adhesive easily penetrates. The adhesion strength at the time of adhering the veneer on the surface and the wooden substrate is improved. Therefore, even if the floor plate is repeatedly deformed when the above impact is applied, it is possible to sufficiently prevent delamination on these attachment surfaces. Further, when the floorboard of the present invention is held during transportation or construction, a U-shaped or inverted U-shaped curve is easily generated.
Although shear deformation occurs in the soft synthetic resin sheet and causes peeling between layers, such deformation also makes peeling less likely. Further, the soft synthetic resin sheet alone causes a large proportion of shrinkage and expansion due to temperature change, which causes problems such as warpage of the floorboard and push-up of joints, but 30 to 60% by weight of wood powder that does not cause dimensional change due to temperature change is mixed. As a result, shrinkage and expansion of the soft synthetic resin sheet with respect to temperature changes can be suppressed, and problems such as warpage and push-up can be prevented.

[0022]

FIG. 1 shows an example of the construction of a floorboard 1 according to the present invention, in which a soft synthetic resin sheet 2 is provided on the surface of a wooden board 3 having a fruit for fitting formed on the side surface thereof. A veneer 1 that is thinner than the resin sheet 2 is attached, and a plurality of grooves 5 that substantially penetrates from the back surface of the wooden substrate 3 to the soft synthetic resin sheet 2 are formed. Further, the back surface of the wooden substrate 3 has a plurality of convex portions. The cushioning material 4 made of synthetic resin foam having the portion 4a on the back surface side is attached.

A real nut for fitting is formed on the four circumferential side surfaces of the floor plate 1, but actual processing is performed so that the soft synthetic resin sheet 2 is exposed on the surface side of the male fruit 6.

FIG. 2 shows a modified example of the floorboard structure shown in FIG. 1, in which a laminated body composed of a non-woven fabric 7 and the synthetic resin foam 8 is used as the cushioning material 4, and the non-woven fabric 7 is provided on the back surface of the wooden substrate 3 on the side thereof. It is affixed.

[0025]

EFFECTS OF THE INVENTION The floorboard according to the structure of the present invention is extremely rich in plasticity, and when a shock is applied to the surface of the floorboard, the entire floorboard is easily deformed, so that an excellent vibration damping effect can be exhibited.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a configuration example of a floor panel according to the present invention.

FIG. 2 is a cross-sectional view showing a floorboard configuration according to a modification of FIG.

[Explanation of symbols]

 1 Floor Board 2 Soft Synthetic Resin Sheet 3 Wooden Substrate 4 Cushioning Material 4a Convex 5 Groove 6 Male 7 Nonwoven Fabric 8 Synthetic Resin Foam

Claims (6)

[Claims] 1. A soft synthetic resin sheet is attached to the front surface of a wooden substrate, and a plurality of grooves are formed from the back surface side of the wooden substrate to a depth that substantially penetrates the soft synthetic resin sheet. A floor board characterized in that a veneer having a thickness smaller than that of the resin sheet is attached to the front surface of the resin sheet, and a cushioning material is attached to the back surface of the wooden substrate. 2. Wood powder is contained in the soft synthetic resin sheet.
The floorboard according to claim 1, wherein the floorboard is mixed in an amount of 0 to 60% by weight. 3. The soft synthetic resin sheet contains 10 to 90 parts of a plasticizer to 100 parts of vinyl chloride resin,
The floor board according to claim 1, which is a vinyl chloride sheet containing 30 to 60% by weight of wood powder. 4. A fitting means is formed on the four peripheral surfaces of the floor board by actual machining, and the actual fruit is formed on the male fruit surface side so that the soft synthetic resin sheet is exposed. The floor board according to claim 1. 5. The floor board according to claim 1, wherein the cushioning material is a synthetic resin foam having convex portions formed on the front and back surfaces. 6. The floorboard according to claim 1, wherein the cushioning material is formed as a laminated body composed of an open-cell type synthetic resin foam and a non-woven fabric, and the non-woven fabric side is attached to the back surface of the wooden substrate. .