JPH06248792A - Floor material - Google Patents

Abstract

PURPOSE:To reduce the generation of cracking caused by nailing of joint by fitting a medium specific gravity fiber plate layer integrally to the surface or back face of a strand board layer formed by laminating numerous thin single plates. CONSTITUTION:Single plates cut thin are numerously laminated to form a strand board layer 11. At this time, the single plates are laminated with the fiber arranged directions changed randomly or changed to various angles within 20-30 deg., or in such a way that the fiber arranged direction of each layer is mutually orthogonal. In addition, the thickness of each single plate of the strand board layer 11 is set to be 0.5mm or less, and the specific gravity of a plate body is set to be 0.5 or more so as not to generate strength shortage. Try wood 13 of 0.5 or more in specific gravity with a medium specific gravity fiber layer 12 disposed is integrally fitted to the surface and back face of the strand board layer 11 in such a way as not to lie on a tongue 11a. Back cracking is thereby prevented at the time of driving a nail into the tongue 11a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to floor materials used in houses, educational facilities and the like.

[0002]

2. Description of the Related Art Conventionally, as a floor material, a single-layer flooring 1 shown in FIG. 5 or a plywood 2 in which odd-numbered veneers shown in FIG. 6 are alternately laminated has been used. In the case of plywood, the thickness of the veneers 3, 4, ..., 7 to be composed is limited to at most about 1 mm for productivity reasons. Was at most about 3 sheets.

On the other hand, at the time of constructing a floor of a house or an educational facility, it is common practice to hammer a nail into the convexity of the floor material so that the floor material is fixedly integrated with the base material, and the construction is carried out by the joist construction method. is there.

As shown in FIG. 4, when the lengthwise joints of the flooring members 8 and 9 are butted on one joist 10, the joist 1
Since the width of 0 is usually only about 45 mm, even if one nail is struck on each floor material, the projections 8a, 9
It had to be hit close to the end of a within about 20 mm.

[0005]

However, in the case of the conventional single-layer flooring, as shown in FIG. 5, since the convex portion 1a is a single layer, there is a drawback that it is extremely fragile when nailing. there were.

In the plywood shown in FIG. 6, each veneer is thick and many back cracks occur during the production of the veneer by the rotary race, and the cracks can be spread by nailing. However, there is a drawback in that the projection 2a is easily cracked. Further, in plywood, only about three veneers are located in the actual part, so when one is chipped or cracked, the strength of that part becomes extremely weak. There was a drawback that cracks were likely to occur.

Therefore, the shape of the fruit itself has been improved and the shape shown in FIG.
As shown in Fig. 2, the lower part of the convex seed 2a is projected in a mating shape, the number of veneer layers in the part where the nail is driven is increased, and resistance to spread of cracks caused by driving the nail is improved. In some cases, the lower part of the concave seed 2b needs to have a recessed structure in accordance with this, and the actual shape becomes large, resulting in a significant decrease in yield. .

Therefore, the present invention has been conceived in order to eliminate the above drawbacks, and reliably reduces the occurrence of cracking of the fruit due to nailing, without using the fruit of a special structure which reduces the yield. The object is to provide a floor material that can be used.

[0009]

In the flooring material of the present invention, in the cross-section of the flooring material, the central portion where the actual position is located is a strand board layer in which a plurality of thinly cut veneers are laminated, and the surface of the strand board layer is The back surface or the front surface is a medium specific gravity fiberboard layer, and a plate-like body (hereinafter referred to as triwood) in which the strand board layer and the medium specific gravity fiberboard layer are integrated is appropriately applied with makeup.

[0010]

The triwood constructed as described above is cut in the same manner as ordinary plywood to form fruit. The flooring material thus obtained is constructed by the joist construction method as in the case of ordinary plywood. At this time, in the process of nailing the convex solid and fixing and integrating with the joist material as the base material, the single plate of the convex solid portion is thin and many are laminated, and about one of them is cracked, Even if there are defects such as chipping or death, the strength of that part does not become significantly weaker, and since the veneer does not have a single fiber direction, it is tenacious and resists spread by nailing.

The medium specific gravity fiberboard layers provided on the front and back surfaces or the front surface maintain extremely good smoothness on the front and back surfaces or the front surface.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a medium specific gravity fiber board is formed on the front and back surfaces of a strand board layer 11 having a structure in which a large number of single plates cut to a thickness of 0.5 mm or less are laminated so as not to cover convex portions 11a. A triwood 13 having a specific gravity of 0.5 or more, on which the (MDF) layer 12 is arranged, is cut in the same manner as a normal plywood to form a fruit to form a floor material.

In the present embodiment, a large number of veneers are laminated to form a strand board layer.
As shown in FIG. 3, the fiber directions of the individual plates 11n, 11n, ...

Also, a single plate 11n of a strand board layer
Is cut to a thickness of 0.5 mm or less, and 5 to 6 to 20 sheets are located on the convex portion.

Furthermore, the tri-wood 13 of this embodiment is
If the specific gravity is less than 0.5, the strength of the flooring material may be insufficient. Therefore, the specific gravity is 0.5 or more, which is necessary for a floor material for a general joisting method.

With the above construction, the present embodiment has uniform strength, a portion of the strength is not significantly reduced, and the occurrence of back cracking is extremely small during the production of the veneer by the rotary race, and the convex portion 11a is nailed. It is possible to form an extremely tough fruit that tenaciously resists the spread by the nail when driving, and it is possible to extremely reduce the occurrence of cracks in the convex fruit 11a.

Further, since the medium specific gravity fiberboard layer 12 is completely integrated and provided on the front and back surfaces or the front surface of the strand board layer 11, it is a flooring material having high strength and excellent surface smoothness. .

As shown in FIG. 2, the medium specific gravity fiber board 12 may be provided only on the surface of the strand board layer 11.

The flooring material of this embodiment constructed as described above is appropriately applied with makeup. This makeup means applying a veneer to the front and back or front surface of the flooring material, It is to stick a sheet of paper, vinyl chloride or the like, or to apply processing such as direct printing.

As a second embodiment, when the strand board layer is formed, the stacking method of the single plates is generally one direction,
We provide various veneers laminated at different angles within 20 to 30 degrees by shifting the fiber direction.

In the case of this embodiment, there is no need to intentionally shift the fiber direction of each veneer by about 20 to 30 degrees, but it is possible to shift it by just trying to stack it in approximately one direction, so the angle of The misalignment is considered as an error, and the stacking is easy and easy to form. Moreover, since a strand board in which the fiber directions are considerably intersected with each other can be formed, a material which is not so inferior to the first embodiment can be expected.

As a third embodiment, when the strand board layer is formed, a plurality of layers are combined to form a strand board layer. Each of the plurality of layers is formed in a layer in which the fiber directions of the individual veneers are offset from each other at various angles within 20 to 30 degrees, although they are generally in one direction. Then, the respective layers are combined so that the fiber directions thereof are substantially orthogonal to each other to form the entire strand board layer.

In the case of this embodiment, it can be considered as a construction like plywood, but since it is a construction made by laminating thin veneers, a material having a strength substantially equal to or higher than that of the first embodiment is expected. it can.

In each of the first, second, and third embodiments, the strand board layer 11 and the medium-density fiber board layer 12 are made of a relatively low-quality raw material such as radiata pine that grows quickly and is easy to plant. It can be used with high yield, and it is not necessary to use rainforest materials such as lauan. The reason is that since the thin single plates are laminated and formed, it is possible to produce an excellent flooring material having uniform strength.

The flooring material of the present invention is another building material having fruit,
For example, it can be applied to ceilings, walls, and various panels.

[0026]

According to the present invention, it is possible to reduce the occurrence of cracks due to actual nailing without changing the actual shape of the flooring material to a special shape that leads to a reduction in yield, The productivity and the workability can be improved, and it is possible to prevent troubles after the work, which is extremely useful.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in the width direction of a single flooring material showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view in the width direction of a flooring material showing an example in which a medium specific gravity fiberboard layer is provided only on the surface of one embodiment of the present invention.

FIG. 3 is an explanatory view showing how the single plates forming the strand board layer of the first embodiment of the present invention are overlapped.

FIG. 4 is a plan view showing a nail driving position when a seam of a flooring material comes on a joist.

FIG. 5 is a cross-sectional view in the width direction of a single flooring material of a conventional single-layer flooring.

FIG. 6 is a cross-sectional view in the width direction of a single flooring material using a conventional plywood as a base material.

FIG. 7 is a cross-sectional view in the width direction of a single flooring material using a plywood having a fruit of a crack preventing structure in which a lower portion of a conventional convex fruit is projected as a base material.

[Explanation of symbols]

 1 single-layer flooring 1a convex solid 1b concave solid 2 plywood 2a convex solid 2b concave solid 3 plywood surface material 4 plywood cross layer 5 plywood core layer 6 plywood cross layer 7 plywood backing material 8 floor material 8a convex solid 9 floor Material 9a Convex fruit 10 joist 11 Strandboard layer 11a Convex fruit 11b Concave fruit 11n Veneer 12 Medium density fiberboard layer 13 Triwood 14 Nail

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area B32B 21/10

Claims (5)

[Claims] 1. In the cross section of the flooring material, the central portion where the fruit is actually located is a strand board layer formed by laminating a large number of thinly cut veneers, and the front and back surfaces or the surface of the strand board layer are medium specific gravity fiber board layers. A floor material comprising a plate-like body in which the strand board layer and the medium specific gravity fiber board layer are integrated, and which is appropriately applied with makeup. 2. The thickness of each veneer of the strand board layer is 0.5 mm or less, and the specific gravity of the plate is 0.5.
The flooring material according to claim 1, which is the above. 3. The flooring material according to claim 1 or 2, wherein the strand board layer has a structure in which the direction in which the fibers of each veneer are arranged is randomly changed and laminated. 4. The flooring material according to claim 1 or 2, wherein the strand board layer has a structure in which fibers of each veneer are laminated by changing the direction in which the fibers are arranged at various angles within 20 to 30 degrees. 5. The strandboard layer comprises a plurality of layers obtained by changing the direction in which the fibers of each veneer are lined up at various angles within 20 ° to 30 ° so as to be aligned in substantially one direction and laminating the fibers of each layer. The flooring material according to claim 1 or 2, wherein the flooring material has a laminated structure such that the aligned directions are substantially orthogonal to each other.