JP2001227147A - Floor board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor board, in which a tongue section is not broken and damaged even in holding a heavy article for a prolonged term and which has excellent strength. SOLUTION: In the floor board in which arbitrary decoration is executed onto the surfaces of baseboard while the tongue sections composed of male tongues 4 and female recess 5 having a shape that both can be fitted mutually are formed at the four peripheral edges of the baseboards, a surface-layer woody fiber board 1, in which hard layers 1a, 1b having specific gravity higher than a central section in the thickness direction are formed on a surface and a rear while its mean specific gravity is higher than that of an intermediate-layer woody fiber board and is set in 0.6-1.4 is stuck on the surface of the intermediate-layer woody fiber board 2, in which hard layers 2a, 2b having specific gravity higher than a central section in the thickness direction are formed on a surface and a rear while its mean specific gravity is set in 0.4-1.0, a rear-layer woody board 3 is stuck on the rear of the intermediate-layer woody fiber board, and a floor-board substrate is constituted of the three layers of these surface-layer woody fiber board, intermediate-layer woody fiber board and rear-layer woody board. The rear-side hard layer 1b of the surface-layer woody fiber board or the surface-side hard layer 2a of the intermediate-layer woody fiber board is exposed from the top faces of the male tongues.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a floorboard.

[0002]

2. Description of the Related Art Conventionally, various wooden materials have been used as substrates, and the surface of the substrates has been arbitrarily decorated. A floorboard formed at four peripheral edges is provided.

[0003] Such a floor plate is installed on a floor base such as a joist, a floor base plate or a concrete slab by driving a fixing tool such as a nail or a finish nail from above the male.
Construct the floor of the room.

[0004]

Since the interior of the room after the floorboards are constructed is generally used as a living room, furniture, pianos, televisions and other various electric appliances and other heavy objects are arranged on the floor. And the floorboard will bear the load of these heavy objects for a long period of time.

On the other hand, of the real part of the floorboard, the male part is cut off at the upper and lower layers of the substrate edge to form a convex part, and the female part is formed at the middle part of the substrate edge to form a concave part. The part is cut off, and in any case, because the part in the thickness direction is cut off at the edge of the substrate, the strength is weaker than other parts, and it is easily broken when subjected to a large load or strong impact Things.

For this reason, if the above-mentioned heavy object is disposed immediately above the joint portion between the floor plates formed by the fitting of the male and female members, the load is applied to the actual portion and the real portion is destroyed. In some cases, the nails could not work and the floorboards were raised, causing floor noises and irregularities.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned problems in the prior art, and provides a floor panel excellent in strength which does not cause destruction or breakage in a real part even when a heavy load is applied for a long period of time. The purpose is to provide.

In order to achieve this object, according to the present invention, a real part is formed on the surface of a substrate, the male part having a shape capable of fitting with each other, and a male part and a female part being formed at the four peripheral edges thereof. In the floorboard, a hard layer having a higher specific gravity than the center in the thickness direction is formed on the front and back surfaces, and the average specific gravity is 0.4 to 1.0. A hard layer having a higher specific gravity is formed on the front and back sides, and an average specific gravity is higher than the average specific gravity of the middle-layer wood fiber board, and a surface wood fiber board having an average specific gravity of 0.6 to 1.4 is affixed thereto. A back layer wood board is stuck on the back of the board, and the surface board is constituted by three layers of the surface wood fiber board, the middle wood fiber board and the back wood board. Is the back side of the surface wood fiberboard or the front side of the middle wood fiberboard. Hard layer of Zureka is characterized by comprising been exposed.

According to a preferred embodiment of the present invention, the hard layer on the back side of the middle-layer wood fiberboard is exposed on the lower surface of the male fruit.

[0010] According to another preferred embodiment of the present invention, a wood fiber board having a hard layer having a higher specific gravity than its center in the thickness direction is used as the back wood board. In this case, more preferably, either the back side hard layer of the middle layer wood fiberboard or the front side hard layer of the back layer wood fiberboard is exposed on the lower surface of the male. Further, it is preferable that the rear hard layer of the surface wood fiberboard is exposed on the upper surface of the female grain and / or the front hard layer of the back wood fiber board is exposed on the lower surface of the female grain.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a floor panel according to an embodiment of the present invention; FIG.
The floorboard 1 has a substrate formed by laminating a surface wood fiber board 1, an intermediate wood fiber board 2, and a back wood board 3 in this order from the front side.

Surface wood fiberboard 1 and middle wood fiberboard 2
The wood fiberboard is made of softwood such as pine, cedar and cypress or hardwood such as Rawan, Kapole, chestnut and poplar, as well as house or sawmill waste, and bonded to the resulting wood fiber. It is obtained by forming after adding an agent and then pressing and bonding. Such a wood fiber board has excellent dimensional stability because the dimensional change rate per 1% of water content is extremely small, 0.03 to 0.04%.

The wood fiber board has a hard layer on both sides.
That is, the hard layers 1a, 1
b, hard layers 2a, 2b
have. These hard layers have a higher specific gravity than the center in the thickness direction, and have a layer thickness of about 0.3 to 3 mm. By providing hard layers with high specific gravity and excellent tensile strength and compressive strength on the front and back of the wood fiber board, the flexural strength is excellent, the amount of deflection under a unit load is very small, and the surface It also has excellent scratch resistance and surface smoothness.

The average specific gravity of the whole wood fiberboard is in the range of 0.4 to 1.0, and the average specific gravity of the surface wood fiberboard 1 is in the range of 0.4 to 1.0.
Is larger than the average specific gravity and is in the range of 0.6 to 1.4.

As described above, by making the average specific gravity of the surface wood fiber board 1 larger than the average specific gravity of the middle wood fiber board 2, the surface wood board 1 which is more excellent in strength is located on the substrate surface, Strength and surface hardness can be improved.

With respect to the specific gravity of the hard layer, the specific gravity of the front and back hard layers 2a and 2b of the middle-layer wood fiber board 2 is 0.8 to 1.4, and the specific gravity of the front and back hard layers 1a and 1b of the surface wood fiber board 1 is 0.9 to 1.6. If the specific gravity of the hard layer of each wood fiber board is smaller than the above lower limit, sufficient tensile strength or compressive strength cannot be obtained, and conversely, if it is larger than the above upper limit, the impact resistance decreases and the layer becomes brittle. This causes problems such as being easily broken when subjected to an impact.

The back layer wood board 3 constituting the back layer of the floor board is made of any wood board such as solid wood, plywood, veneer laminate, particle board, wood fiber board, and glued laminated wood.

The surface wood fiber board 1, the middle wood fiber board 2 and the back wood fiber board 3 are laminated and bonded via an optional adhesive to form a floor board substrate. The front side hard layer 1a of the surface wood fiber board 1 is exposed on the surface of this floor board substrate, and inside the floor board board, the back side hard layer 1b of the surface wood fiber board 1 and the middle wood fiber board 2 are formed. The front side hard layer 2a is adjacent to and forms a thick hard layer with these two layers, and the back side hard layer 2b of the middle-layer wood fiber board 2 is included therein.

A decorative layer (not shown) is formed on the surface of the substrate. For example, on a substrate surface, a natural veneer or artificial veneer, or a veneer sheet lined with a veneer sheet such as a nonwoven fabric, paper, or a synthetic resin sheet, or a decorative sheet such as a decorative paper, a decorative synthetic resin sheet or a film. Can be applied to make up. The surface of the applied decorative sheet may be further coated. Alternatively, makeup by pattern printing may be applied.

At the four peripheral edges of the substrate, as is well known, a real part composed of a male nut 4 and a female nut 5 that can be fitted to each other is formed. The male nut 4 is formed so that either the hard layer of the back side hard layer 1b of the surface wood fiber board 1 or the front hard layer 2a of the middle wood fiber board 2 is exposed. In FIG. 1, male seeds 4 and female seeds 5 are formed using the entire thickness of the middle-layer wood fiber board 2, and the surface-side hard layer 2 a is exposed on the upper surface of the male seeds 4. In FIG. 2, male fruit 4 and female fruit 5 having a thickness obtained by adding the thickness of the back side hard layer 1 b of the surface wood fiber board 1 to the total thickness of the middle wood fiber board 2 are formed. Board 1
Is exposed on the upper surface of the male 4.

As described above, by exposing the hard layer on the upper surface of the male nut, the male nut which is insufficient in strength due to its thinness is reinforced, and the male nut is subjected to an impact or a load. Sometimes it is possible to prevent the male fruit from being damaged or destroyed. In addition, it is excellent in the function of preventing breakage when nails are driven into the floorboard at the time of construction, and firmly holding the driven nails with a hard layer having a high specific gravity.

According to a preferred embodiment of the present invention,
The hard layer is also exposed on the lower surface of the. In FIGS. 1 and 2, the back side hard layer 2 b of the middle-layer wood fiber board 2 is exposed on the lower surface of the male 4. By exposing the hard layers on both the upper and lower surfaces of the male nut 4 in this manner, the reinforcing effect on the male nut is more remarkably exhibited, and the nails driven are held by two hard layers spaced apart from each other. Therefore, the nail holding force becomes extremely large.

Further according to a preferred embodiment of the present invention,
The hard layer is also exposed on the upper and lower surfaces of the female nut 5. For example, in FIG. 1, as described above, the male fruit 4 and the female fruit 5 are formed using the entire thickness of the middle-layer wooden fiber board 2, so that the rear hard layer 1 b of the surface wood fiber board 1 It is exposed on the upper surface. This also reinforces the female nuts and prevents damage to the female nuts even when the male nuts move up and down due to the impact on the floorboard and collide with the inner surface of the female nuts that have fitted the male nuts. can do.

As the back layer wood board 3, a wood fiber board having a hard layer on the front and back can be used. In this case, the hard layer is also provided on the bottom surface of the floor board, so that Surface side hard layer 1a of surface wood fiber board 1 arranged on the surface
Together with this, it is possible to greatly improve the bending strength of the floorboard, and to suppress the expansion and contraction due to the change in the water content, thereby providing extremely excellent dimensional stability.

FIGS. 3 and 4 show examples of the configuration of the embodiment in this case. The surface wood fiber board 1, the middle wood fiber board 2 and the back wood fiber board 3 'are laminated and adhered in this order from the front side. To form a floorboard substrate.

In FIG. 3, the total thickness of the middle-layer wood fiber board 2 is added to the thickness of the back hard layer 1b of the surface wood fiber board 1 and the thickness of the front hard layer 3a of the back wood fiber board 3 '. A male fruit 4 and a female fruit 5 are formed, and the rear hard layer 1b of the surface wood fiber board 1 is on the upper surface of the male wood 4 and the front hard layer 3a of the back wood fiber board 3 'is male. The lower surface of each of the male members 4 is exposed to reinforce the male member 4 and increase the nail holding force.

In FIG. 4, a male fruit 4 and a female fruit 5 are formed by using the entire thickness of the middle-layer wood fiber board 2, and the front hard layer 2a and the rear hard layer 2b are formed on the upper surface of the male wood 4, respectively. And exposed on the lower surface, similarly reinforcing the male 4 and increasing the nail holding force. Furthermore, in this embodiment, the back hard layer 1b of the surface wood fiber board 1 and the front hard layer 3a of the back wood fiber board 3 'are exposed on the upper surface and the lower surface of the female nut 5, respectively. Is also well reinforced.

The back layer fiberboard 3 'preferably has substantially the same specific gravity and thickness as the surface layer wood fiberboard 1, that is, the same wood fiberboard is bonded to the surface layer wood fiberboard 1 and the back layer fiberboard 3'. Is preferably used. As a result, the mechanical properties and dimensional changes of the front and back layers of the floorboard substrate become equal, and the front and back layers are constrained and balanced with each other, thereby preventing the occurrence of warpage due to the dimensional change.

According to such an embodiment, the surface-side hard layer 1a of the surface wood fiber board 1 is exposed on the surface of the floor board board, and the inside of the floor wood board 1 Back side hard layer 1b and middle layer wood fiber board 2
A front hard layer 2a of the middle wood fiber board 2 and a front hard layer 3a of the back wood fiber board 3 '. A hard layer having a thick layer is included therein, and the back side hard layer 3b of the back layer wood fiber board 3 'is exposed on the back side of the floorboard substrate.
According to such a configuration of the floor board substrate, the bending strength is further increased, and the balance between the front and back sides is good, and the dimensional stability is very excellent.

[0030]

As described above, according to the floorboard of the present invention, the upper surface of the male formed at the edge of the floorboard substrate has the lower surface side of the surface wood fiberboard or the upper surface side of the middle wood fiberboard. Either of the hard layers is exposed, and the male part is sufficiently reinforced, so that damage or destruction of the male part due to driving of nails or finish nails during construction of the floorboard is prevented, and the floorboard is fixed. And the workability is improved.

The floorboard substrate of the present invention is formed by laminating a surface wood fiber board, a middle wood fiber board and a back wood fiber board in this order from the front side, and the front wood fiber board and the middle wood fiber board each have hard layers on the front and back. Therefore, the surface side hard layer of the surface wood fiber board is exposed on the substrate surface, and inside the floorboard substrate, the back side hard layer of the surface wood fiber board and the surface of the middle wood fiber board are exposed. The side hard layer is adjacent to and forms a thick hard layer with these two layers, and the hard layer on the back side of the middle-layer wood fiber board is embedded therein, and the mechanical strength is improved by these at least three hard layers. It is a very good substrate.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a floor panel according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a floor panel according to another embodiment of the present invention.

FIG. 3 is a sectional view showing a floor panel according to still another embodiment of the present invention.

FIG. 4 is a sectional view showing a floor panel according to still another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 surface wood fiber board 1a front hard layer 1b back hard layer 2 middle wood fiber board 2a front hard layer 2b back hard layer 3 back wood board 3 'back wood fiber board 3a front hard layer 3b back Hard layer 4 Male 5 Female

 ──────────────────────────────────────────────────続 き Continued from the front page F term (reference) 2B250 AA05 BA05 CA11 DA04 EA02 EA13 EA18 FA21 FA28 FA31 FA33 2B260 AA12 BA01 BA19 CB01 CD03 CD22 EA03 EB06 EB19 EB21 4F100 AP01C AP02C AP03A AP03B AP03C BA03 BA07 BA10B BA10B JA13B JA13C JK12A JK12B YY00A YY00B

Claims (5)

[Claims] 1. A floor panel in which a real part made of a male and a female that can be fitted to each other is formed on the four peripheral edges of the floor plate, the surface of the substrate being provided with an arbitrary makeup, and a center in the thickness direction. A hard layer having a higher specific gravity than the center portion in the thickness direction is formed on the surface of the middle-layer wood fiber board having a specific gravity of 0.4 to 1.0 and a hard layer having a higher specific gravity than the upper and lower portions. And a surface wood fiber board whose average specific gravity is higher than the average specific gravity of the middle wood fiber board and is 0.6 to 1.4 is adhered, and a back wood board is provided on the back surface of the middle wood fiber board. The substrate is composed of three layers of the surface wood fiber board, the middle wood fiber board, and the back wood fiber board, and the upper surface of the male is on the back side of the surface wood fiber board. Alternatively, make sure that any hard layer on the surface side of the middle-layer wood fiberboard is exposed. Floorboards characterized by. 2. The floorboard according to claim 1, wherein a hard layer on the back side of the middle-layer wood fiberboard is exposed on the lower surface of the male fruit. 3. The floorboard according to claim 1, wherein a wood fiberboard having a hard layer having a higher specific gravity than the center in the thickness direction is used as the back layer wood board. 4. The floorboard according to claim 3, wherein either the back side hard layer of the middle layer wood fiber board or the front side hard layer of the back layer wood fiber board is exposed on the lower surface of the male fruit. 5. The backside hard layer of the surface wood fiberboard is exposed on the upper surface of the female nut, and / or the front side hard layer of the backwood fiberboard is exposed on the lower surface of the female nut. The floor panel according to claim 4, characterized in that: