JPH0520830Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to improvement of wooden flooring materials.

<Prior art and its problems> Among wooden flooring materials, flooring boards are installed on the joists in wooden houses using the nailing method, but in non-wooden buildings, a joist base is installed on the concrete floor and then installed on top of that. Alternatively, it can be attached using a so-called adhesive method, in which it is attached directly with an adhesive.

However, when a long rectangular wood product is placed directly on concrete, it often absorbs moisture in the concrete and warps or bends, causing it to separate from the floor. Also, if the floor surface is not flat, when gluing, pressing down on one side may cause the other side to rise.
Enforcement is extremely difficult. Warpage is particularly large if the flooring boards are made of bare wood.

As one of the conventional techniques to solve this inconvenience,
There is a flooring material described in Japanese Utility Model Application No. 62-7542. This is made by forming a base plate by arranging a large number of wooden unit pieces horizontally with gaps in the shape of a piano keyboard, and then bonding a thin wooden surface material to the base plate. .

However, this flooring requires a great deal of expense to manufacture. That is, the raw material is dried in the sun for 3 to 4 months and artificially dried for several days, and then cut into small pieces. These small pieces are arranged, spaced apart by metal wires, and connected to form a base plate. For this reason, manufacturing requires a large area for drying in the sun, as well as
Many machines and equipment are required, such as an artificial dryer, boiler, unit piece manufacturing machine, alignment device, combination molding and connection device, and polishing machine.

However, in this composite flooring material, a surface material is adhered onto the above-mentioned base plate to finally form a single flooring material. For this reason, there is no inevitable reason to create a base plate by connecting unit pieces at intervals with metal wires, and it would be sufficient to provide narrow grooves at intervals on the base plate from the beginning.

Further, in the above-mentioned composite flooring material, one thin plate is bonded onto each unit piece. This is because the product needs to have the strength, rigidity, durability, and aesthetics of flooring, although it can be bent to some extent in the length direction.
This is because it must be 2 mm or more and less than 4 mm.

However, it is difficult to make such high-quality thick veneer without warping or cracking, and the cost is high. On the other hand, if a thin veneer of around 1mm is used, it will be easier to bend in the longitudinal direction, but on the other hand, it will be limp and lack the rigidity and strength to be used as a flooring material, making it prone to cracking.

To avoid this, a backing material may be provided between the decorative material and the base plate to reinforce it. However, bonding the decorative material and the backing material onto the base plate is difficult to manufacture and increases the number of steps, which increases costs.

<Means for solving the problem> The present invention is a wooden flooring material developed to solve the above problems, and is constructed as follows.

That is, the fiber direction of the surface veneer of a rectangular plywood serving as a base plate is aligned with the longitudinal direction of the plywood, and a veneer having the same fiber direction as this is glued onto the surface layer veneer as a surface decorative material, In the base plate part,
This is a wooden flooring material in which a number of narrow grooves with open lower ends are provided at intervals, perpendicular to the fiber direction of the surface decorative material, and at a depth that leaves one surface layer veneer on the base plate.

<Example> Below, an example of the present invention will be described based on the drawings. First, prepare a rectangular plywood 2 with 3 to 5 plies that will serve as the base plate 1. The fiber direction of the surface veneer 21 of the plywood 2 is formed along the longitudinal direction of the plywood 2. A single veneer 4 is glued onto the base plate 1 as a surface decorative material 3 to form an integral structure. The fiber direction of the veneer 4 is
They are combined so that the fiber direction is the same as that of the surface layer veneer 21. The thickness of the veneer 4 shall be less than 4 mm.

A large number of narrow grooves 5 are formed in a portion of the base plate 1 at predetermined intervals. The narrow grooves 5 are formed in a direction perpendicular to the width direction of the base plate 1, that is, the fiber direction of the surface veneer 21, and have a depth such that one surface veneer 21 remains. In this way, the surface layer veneer 21 remains as a single sheet without being cut, so this surface layer veneer 21 functions as a backing material. The reason why the fiber direction of the surface layer veneer 21 is the longitudinal direction is because, as a property of wood, fibers are arranged in parallel in the fiber direction, so wood is strong against bending stress in this direction. However, in a direction perpendicular to this, the fibers are short and the fibers are arranged in parallel like a piano keyboard, resulting in a decrease in both rigidity and strength. For this reason, it is easy to bend and tears easily occur between the fibers, which reduces its strength as a backing material.

The interval between each narrow groove 5 shall be 5 mm or more and less than 50 mm.
The reason for this is that if the spacing is less than 5 mm, the edges of the grooves are likely to chip, while if the spacing is more than 50 mm, the cut portions may appear knotted or striped on the surface, and are easy to bend and easy to install. This is because the property disappears.

As shown in FIG. 2, the four circumferences of the base plate 1 are provided with dowels 6 and eyes 7 on two adjacent circumferences so that they can be connected in the vertical and horizontal directions.

<Effects of the invention> Since the invention is configured as explained above,
It has the following effects.

1. The surface veneer of the plywood was not cut and 1
It remains as a single plate. Furthermore, the fiber direction is the same as that of the decorative veneer. Therefore, the veneer has appropriate elasticity in the longitudinal direction, that is, in the fiber direction, and also has the minimum necessary strength as a board, making it an effective backing material. As a result, there is no need to thicken the surface decorative material or intervene with a backing material, resulting in cost reduction.

2. Unlike conventional products where the base plate is formed by arranging a large number of unit veneers, by simply providing narrow grooves at intervals on the base plate, a product with mosaic parquet on the base plate and flooring board on the surface can be obtained. .
Therefore, in addition to the alignment device and molding connection device that were necessary in the conventional product, a large number of mechanical equipment is no longer necessary to manufacture the base plate portion, resulting in a significant cost reduction.

[Brief explanation of drawings]

FIG. 1 is an explanatory perspective view showing the base plate and surface decorative material of the present invention, and FIG. 2 is a perspective view showing the appearance of the same. 1...Bedboard, 2...Plywood, 21...Surface veneer,
3...Surface decorative material, 4...Single board, 5...Small groove.

Claims (1)

[Scope of utility model registration request] The fiber direction of the surface veneer of the rectangular plywood that will become the base plate is aligned with the longitudinal direction of the plywood, and a veneer with the same fiber direction as this is glued onto the surface layer veneer as a surface decorative material. A wooden flooring material in which a number of narrow grooves with open lower ends are provided at intervals in the board part, perpendicular to the fiber direction of the surface decorative material, and at a depth that leaves one surface veneer of the base plate.