JPS6016655A - Building floor panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a building floor plate, and an object of the present invention is to provide a floor plate with excellent heat insulation properties, moldability, and durability.

BACKGROUND OF THE INVENTION Conventionally, building floorboards formed in a rectangular shape and used by laying a large number of them on the floor are made of die-cast aluminum, steel, wood, asbestos, or the like. Those made of aluminum die-casting have poor insulation properties, make footsteps sound, and are heavy.

Therefore, thick tiles or carpets are often used for soundproofing and heat insulation. It also has drawbacks such as expensive raw materials. Those made of steel (steel < tS board) also have poor insulation properties and have the disadvantage of making footsteps echo.
Moreover, it is heavy. To prevent this, we install thick tiles or carpets, or fill the hollow parts of the floorboards with soundproofing and heat-insulating foam. Building floorboards made of wood are too expensive to have a back surface shape (curved or uneven shape) to provide sufficient strength. In other words, it is not suitable for mass production. Also, it is easily flammable.

Since the water absorption rate is high, accuracy cannot be maintained well, and there are drawbacks such as warping and other distortions occurring during use. Those made of asbestos have the disadvantage that they rub against adjacent floorboards during use, producing fine powder, which gradually enlarges the joints and opens gaps. It is also heavy, has a high water absorption rate, and expands due to water absorption.

It has the disadvantage of shrinkage due to drying and lack of precision. As described above, all conventional floor boards for buildings have had problems.

The present invention has been developed by examining various drawbacks of conventional products as described above, and has developed a floorboard for buildings that has good product precision, does not distort during use, is comfortable to walk on without making footsteps echo, and can be provided at a low cost. As a result of consideration, this is what we have completed. Its structural feature is that a mixture of wood flour and thermoplastic resin is injection molded under heat to provide a plate and legs at its corners.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a front view of a building floor plate according to the present invention, and FIG.
The figure is a bottom view of the same. FIG. 3 is a sectional view taken along the line AA in FIG. 2. FIG. 4 is a partial side view of the building floorboard of the present invention installed on a height adjustment table.

As seen in these figures, the building floorboard in this embodiment has legs (2) at the four corners of a rectangular board (1). In order to further increase the strength, ribs (6) are provided in a grid pattern on the bottom surface. This shape is obtained by injection molding a mixture of wood flour and thermoplastic resin under heat. Pure style, cushion floor, or carpet is laminated to the surface of this building floorboard as a surface flooring material (3) as required. As shown in Figure 1, such floorboards for buildings are used by providing screw holes in the legs (2) and inserting height adjustment screws (4), or as shown in Figure 4. Place it on the support stand (5) so that it can be laid. The shape of the plate (1) may be triangular in addition to the rectangular shape shown in the figure.

The wood flour and thermoplastic resin that make up the building floorboard of the present invention will now be described in detail. The type of wood used as raw material for wood flour does not matter. It turns out that most trees can be used. In reality, it is best to use easily available coniferous trees. Wood flour is sawdust from lumbering, so it can be used as waste.6 Thermoplastic resins begin to carbonize when wood flour exceeds 200"C, so thermoplastic resins are limited to those that melt at temperatures below 200"C. It will be done. Such thermoplastic resins include polyethylene, polypropylene, nylon, ABS, and the like. As building floorboards are desired to have high bending strength and low water absorption, tests have shown that ABS is optimal.

When wood flour is mixed into thermoplastic resin, the properties of building floorboards become as follows.

That is, the tensile strength gradually increases until the wood flour content reaches 30%, and decreases as the wood flour content exceeds 30%.

The bending strength gradually increases as the wood flour content increases to 50%.
The water absorption rate does not change much at higher mixing rates.The water absorption rate does not change much depending on the wood flour mixing rate, but the water absorption rate is lower than those made of wood, and the dimensional change due to water absorption is also small. The sound insulation property improves in proportion to the mixing ratio of wood flour.

Regarding moldability, it was good up to a wood flour content of 70%, but moldability was impossible when it exceeded 80%. In addition, wood flour 0
%, that is, in the case of only thermoplastic resin, warpage and bending occur, causing problems in terms of dimensional accuracy and bending strength. From the above results, it is preferable to mix 50 to 70% of wood flour into building floorboards.

The above-mentioned building floorboards can be made into flame-retardant building floorboards by mixing wood flour with a flame retardant such as basic paraffin into a thermoplastic resin, or by using a thermoplastic resin that is itself flame-retardant. It is also possible to do both at the same time.

The building floorboard of the present invention as described above has the following features.

■Good dimensional accuracy and no deviations.

That is, since the water absorption rate is low, there is no dimensional change due to water absorption. In addition, it does not crack or thin, and is less likely to warp or bend due to changes in room temperature.

■Features a comfortable walk without making footsteps.

Since it's made of non-metallic material, it's not too hard, your footsteps don't make any noise, and it's comfortable to walk on.

■Suitable for mass production and can be provided at low cost.

Since the injection molding method is used, the mechanically ideal shape of building floorboards can be created at once, and the molding process does not take much time.

In addition, since there is no cutting, the material yield is 100%.
Moreover, the rib structure requires less material.

■Can be processed using woodworking machines.

Post-processing of aluminum or iron has not been easy in the past, but since it is a mixture of wood and synthetic resin, post-processing of parts of the corners of the floor can be easily done using a woodworking machine.

It is possible to manufacture floorboards for buildings with an integrated zero-surface flooring material.

By placing Pure Style, which has been coated with adhesive and dried in advance, into an injection mold, the tile installation can be completed at the same time as the floorboard molding. This reduces the number of man-hours required for tile pasting and provides a strong bond.

0 Can be used without affixing tiles or carpet to the surface.

It has excellent heat insulation properties and a good surface finish, so it can be used without the above-mentioned surface flooring materials.

■There is extremely little deformation during molding and demolding compared to synthetic resin alone. In addition, the planar accuracy and external dimensional accuracy are good.

[Brief explanation of drawings]

FIG. 1 is a front view of a building floor plate according to the present invention, and FIG.
The figure is a bottom view of the same. FIG. 3 is a sectional view taken along the line AA in FIG. 2. FIG. 4 is a partial side view of the building floorboard of the present invention installed on a height adjustment table. (1) Plate body (2) Legs (3) Surface floor material (4) Adjustment screw (5) Support stand (6) Ribs and above Applicant OEM Industries Co., Ltd. Agent Patent attorney Hirozo Mori

Claims (1)

[Claims] A floor board for a building, which is formed by injection molding a mixture of powder and thermoplastic resin under heating to integrally provide a board (1) and legs (2) at the corners thereof.