JPH0932256A - Floor board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce bending rigidity of a floor board substrate to the utmost possible, allow the whole floor board to be easily deformed for exerting an excellent vibration control action when an impact is applied to the surface of the floor board, and prevent a warp of the floor board by shrinkage and expansion. SOLUTION: A soft synthetic resin sheet 3 integrally laminated with constraining sheets 2, 4 on the surface and back face is stuck on the surface of a wood substrate 5, and multiple grooves 6 are formed from the back face side of the wood substrate 5. A veneer 1 thinner in thickness than the soft synthetic resin sheet 3 is stuck on its surface, and a cushioning material 8 is stuck on the back face of the wood substrate 5. Wood flour of 30-60wt.% is preferably mixed in the soft synthetic resin sheet 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a floorboard.

[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 on the wooden substrate can be formed at least to a depth where two veneers on the surface are left when the substrate is a 5-ply plywood. 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, in which restraint sheets are laminated and integrated on the front and back sides, is attached to the front surface of a wooden board, and a plurality of grooves are formed from the back side of the wooden board. A floorboard characterized in that a veneer having a thickness thinner than that of the soft synthetic resin sheet is attached to the surface of the synthetic resin sheet, and a cushioning material is attached to the back surface of the wooden substrate. Is.

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

A plurality of grooves which substantially penetrate from the back surface side to the front surface side are formed on the wooden substrate.
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 flexural rigidity of the soft synthetic resin sheet provided on the surface of the wood board. It becomes almost equal to the rigidity, the plasticity of the floorboard is improved, and the entire floorboard is easily deformed when an impact is applied to the surface of the floorboard, 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, in which the constraining sheets are laminated and integrated on the front and back sides, attached to the wooden substrate. Ideally, the depth of the groove should be such that it penetrates the wood substrate and does not cut the backside restraint sheet of the soft synthetic resin sheet, but such cutting depth adjustment is practically impossible. It is extremely difficult to bend as a floorboard even if the groove is formed at a depth where the front side of the wooden board is partially left or a depth where the back side restraint sheet of the soft synthetic resin sheet is slightly cut partially. Since it is possible to obtain almost the same rigidity, there is no problem.

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 a metal spoon falls and collides, for example, and the soundproof performance against light weight impact noise deteriorates, 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 10
It is possible to use soft vinyl chloride in which 20 to 90 parts of a plasticizer is mixed with 0 part. Further, also in other resins, 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), they are used as the soft synthetic resin sheet of the floorboard of the present invention. It can be used preferably. 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.

In the present invention, it is particularly preferable to use, as the soft synthetic resin sheet, 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 when attaching the restraint sheet to the front and back surfaces of the sheet 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.

The constraining sheets to be laminated on the front and back of the soft synthetic resin sheet are synthetic fibers such as polyester and nylon, natural fibers such as cotton and wool, or non-woven fabrics formed from fibrous materials such as glass fibers or the like. Woven cloth can be preferably used.

The constraining sheet is laminated and integrated on the front and back sides of the soft synthetic resin sheet to constrain the contraction and expansion of the soft synthetic resin sheet due to heat and the contraction and expansion of the projecting plate, thereby preventing the floor board from warping. Further, by interposing a restraining sheet between the soft synthetic resin sheet and the wood substrate and between the soft synthetic resin sheet and the surface veneer, respectively, it also has a function of improving the adhesive strength between them.

On the other hand, it is desirable to use, as the restraint sheet, one having an excellent stretchability in the plane direction so that the bending rigidity of the soft synthetic resin sheet is not increased by the integral integration of the restraint sheets. From this point of view, too dense one is not preferable, and for example, in the case of non-woven fabric, one having a basis weight of about ²⁰ to 200 g / m ² , particularly 100 g / m ² or less is suitable for use as a restraining sheet of the floorboard of the present invention. Is.

Means for laminating and integrating the constraining sheet on the front and back surfaces of the soft synthetic resin sheet is not particularly limited, but the constraining sheet is laminated so as to be partially embedded in the front and back surfaces of the soft synthetic resin sheet by, for example, heat fusion. It is preferable to integrate them. By doing so, the constraining sheet firmly adheres to the soft synthetic resin sheet and does not cause delamination, and the floor plate warp prevention effect due to the contraction and expansion is maximized. However, when the constraining sheet is made of glass fiber, it is difficult to bond the soft synthetic resin sheet with the glass fiber alone. Therefore, it is preferable to heat-bond the resin sheet with a non-woven fabric made of glass fiber. .

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 contracting and deforming the impact applied to the surface of the floorboard. 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. 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.

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 the 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.

In addition, 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.

[0024]

1 shows the construction of a floorboard according to an embodiment of the present invention, in which the front surface and the back surface of a wooden substrate 5 having a fruit for fitting formed on the side surface thereof are provided with restraining sheets 2, 4 on the front and back sides. The veneer 1 that is thinner than the soft synthetic resin sheet 3 is attached via the soft synthetic resin sheet 3 that is laminated and integrated, and the soft synthetic resin sheet back side restraining sheet 4 from the back surface of the wooden substrate 5
A plurality of grooves 6 that almost penetrate up to are formed, and a cushioning material 8 made of a synthetic resin foam having a plurality of convex portions 7 on the front and back is attached to the back surface of the wooden substrate 5.

A real fruit for fitting is formed on the four peripheral side surfaces of the floor plate 1, but actual processing is performed so that the soft synthetic resin sheet 3 is exposed on the surface side of the male fruit 9.

FIG. 2 shows a modified example of the floorboard structure shown in FIG. 1, in which a laminated body composed of the synthetic resin foam 8 and the non-woven fabric 10 is used as a cushioning material, and the non-woven fabric 10 is attached to the back surface of the wooden substrate 5. It was done.

In these floor boards, a plurality of grooves 6 are formed from the back surface side of the wooden board 5 to a depth almost penetrating the back surface side restraining sheet 4 of the soft synthetic resin sheet 3, so that the rigidity of the wood board 5 is increased. Are virtually completely lost.
Further, the veneer 1 on the surface is thinner than the soft synthetic resin sheet 3, and the flexural rigidity thereof is smaller than that of the soft synthetic resin sheet 3. Further, the flexural rigidity of the cushioning material 8 is small enough to be ignored. Therefore, the flexural rigidity of these floorboards is almost equal to the flexural rigidity of the soft synthetic resin sheet 3, and the floorboard is very plastic. Therefore, it was proved that the entire floor plate was easily deformed when an impact was applied to the surface of the floor plate, and a very excellent vibration damping effect was exhibited.

Further, by using a non-woven fabric made of glass fiber as the restraint sheets 2 and 4, even under the condition that a heating load is applied for a long time due to the use of hot carpet or the like, the glass is not affected by heat and moisture. The fibers exhibited extremely high stability, and it became possible to completely prevent warping of the floorboard.

[0029]

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.

Further, by laminating and integrally forming the restraint sheets on the front and back surfaces of the soft synthetic resin sheet, it is possible to effectively prevent the floor board from warping due to contraction and expansion.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a floorboard according to an embodiment of the present invention.

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

[Explanation of symbols]

 1 Veneer 2 Restraint Sheet 3 Soft Synthetic Resin Sheet 4 Restraint Sheet 5 Wood Substrate 6 Groove 7 Convex 8 Synthetic Resin Foam 9 Male Fruit 10 Nonwoven Fabric

Claims (7)

[Claims] 1. A soft synthetic resin sheet, in which restraint sheets are laminated and integrated on the front and back, 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,
A veneer having a thickness smaller than that of the soft synthetic resin sheet is attached to the surface of the front side restraining sheet of the soft synthetic resin sheet, and a cushioning material is attached to the back surface of the wooden substrate. And the floorboard. 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. . 7. The floorboard according to claim 1, wherein the restraint sheet is a non-woven fabric made of glass fiber.