JP5501558B2 - Flooring - Google Patents

Description

  The present invention relates to a flooring having a hollow portion formed of wood powder obtained from waste material and plastic and extending in the longitudinal direction.

Recycled composite materials formed by pulverizing, mixing, melting and extruding wood and plastic discharged from construction sites and factories are used as flooring materials for outdoor decks (see Patent Documents 1 and 2). ). This flooring has a structure in which the plastic fills the space between the wood flours and protects the surface, so that it has high water resistance and is resistant to corrosion by bacteria and termite damage. In addition, because waste materials are used, it is a product that is friendly to the global environment from the viewpoint of resource protection.
JP 2003-201760 A Design Registration No. 1245461

  Since this flooring is a composite material of wood and plastic, at the time of development, it was considered that there was no expansion due to water absorption. However, if the water drainage is bad due to poor ventilation or drainage clogging due to fallen leaves, dust, etc., water will penetrate into the floor material due to capillary action over several months to several years, and the floor material will It has been found by the inventors' investigation that it expands.

  In the construction of the flooring material, a clearance of 5 mm or more is taken between the flooring materials arranged continuously, but even when the clearance is 10 mm, there is a situation in which the clearance is completely eliminated due to the expansion of the flooring material. . As a result, there is a problem that water accumulates in the hollow portion, and the flooring is warped or cracked.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent floor material from warping and cracking so that water does not collect in the hollow portion of the floor material.

To achieve the above object, the present invention is formed by extruding a mixed material of wood flour and plastic obtained from waste, extend longitudinally, in flooring which have a hollow portion opening at small, When the clearance provided between the floor materials that are continuously provided disappears due to the expansion of the floor material, a notch for draining the water that has permeated the hollow portion to the outside is formed at the lower end of the small edge . It is characterized by.
Here, the small edge refers to an end face in the longitudinal direction of the flooring. The lower end portion of the fore edge is a part that becomes the lower side of the fore edge when the flooring is constructed.
In the present invention, a floor material formed by extruding a mixed material of wood powder and plastic and extending in the longitudinal direction to form a hollow portion that opens at the fore end, a notch that communicates with the hollow portion at the lower end portion of the fore end Since the portion is provided, even when there is no clearance between the floor materials due to the expansion of the floor material, the water that has permeated into the hollow portion is drained to the outside from the notch portion. For this reason, water does not accumulate in the hollow part, and warping and cracking do not occur in the flooring.
In addition, according to the present invention, the cutout portion can be formed simply by cutting the lower end portion of the forehead, and therefore the manufacture is also easy.

In the present invention, is formed by extruding a mixed material of wood flour and plastic obtained from waste, extend longitudinally, in flooring which have a hollow portion opening at small, it is continuously provided the When the clearance provided between the floor materials disappears due to the expansion of the floor material, a slit may be formed on the bottom surface for draining water that has permeated into the hollow portion to the outside .
Here, the bottom surface is a surface that becomes the bottom side when a flooring is constructed.
By forming a slit that communicates with the hollow portion on the bottom surface, as in the case of the above-described invention, even when there is no clearance between the flooring materials due to the expansion of the flooring material, the water infiltrated into the hollow portion is drained to the outside through the slits. The

In the present invention, a mixed material of wood flour and plastic by extrusion molding, and extends in the longitudinal direction, The flooring forming the hollow portion opening at small, the lower end or bottom surface of the small, and medium hollow portion Since the notched portion or slit that communicates is provided, even when the clearance is completely eliminated due to the expansion of the flooring material, the water that has entered the hollow portion is drained to the outside through the notched portion or the slit. For this reason, water does not accumulate in the hollow part, and warping and cracking do not occur in the flooring.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the flooring according to the present invention as viewed from the bottom side, and FIG. 2 is a view of the flooring as viewed from the side.
The flooring 1 according to the present invention is a rectangular plate-shaped recycled composite material formed by extrusion molding of a mixed material of wood powder and plastic and having a width of about 145 mm, a thickness of about 30 mm, and a length of about 4000 mm. is there. A hollow portion 3 extending in the longitudinal direction is formed inside the flooring 1.

  The hollow portion 3 is partitioned by partition walls 4 and 5 extending in the longitudinal direction. In particular, the partition wall 4 has a cross-sectional shape of 8 so that screws can easily penetrate the partition wall 4. . In addition, a concave portion 7 is formed in the longitudinal direction on each side surface portion, and a plurality of grooves 9 extending in the longitudinal direction are formed on the bottom surface 8 at predetermined intervals in the width direction of the flooring 1. Yes.

  A cutout portion 6 communicating with the hollow portion 3 is formed at the lower end portion of the fore edge 2 over the entire width of the flooring 1. The notch 6 is for draining the water that has entered the hollow part 3 to the outside, and the depth D is preferably 3 mm or more.

Here, the material and manufacturing method of the flooring 1 will be described.
Wood flour is made by pulverizing waste materials, wood used in pallets and thinned wood, etc. Plastic, on the other hand, is a crushed flake of factory waste trays, automobile bumpers, agricultural vinyl, and the like. As the plastic material, for example, thermoplastic resins such as vinyl chloride resin, foamed vinyl chloride resin, polyethylene resin, polypropylene resin, ABS resin, polycarbonate resin, polystyrene resin, etc. are used, among which vinyl chloride resin, polyethylene resin, polypropylene Resins are preferred.

  Waste materials that come out when the house is demolished are subjected to acceptance inspections, and then foreign materials such as metal and pebbles are removed and pulverized in stages. And finally, it is made into a wood flour having a particle size of about several hundred microns with a uniform particle size by a sieving machine and sent to the blending step. In addition, the waste plastic from the plastic factory is pulverized to a particle size of about 10 mm by a pulverizer after receiving inspection and sent to the blending process. In the blending step, wood powder, waste plastic, and additives are heated and mixed at a predetermined ratio (for example, about 55% of wood and about 45% of plastic) to produce an intermediate raw material (pellet). Then, the intermediate raw material is heated again by the extruder and formed into a predetermined shape using a mold.

  The flooring 1 can be recycled any number of times, and it has been confirmed that even if the recycling is repeated 10 times, the quality is the same as the first quality. Further, the present flooring 1 has excellent weather resistance, and at the same time, there are no warping, twisting, cracking, crushing, rotting, and small variations in strength, which are the disadvantages of natural materials. Furthermore, it has been confirmed that heavy metals do not elute because it does not use applied parts such as CCA (chromium, copper, arsenic compound wood preservatives) among the building demolition materials. Also for formaldehyde, which is considered to be part, the amount of emission is 0.02 mg / L.

When the flooring 1 is used as an outdoor deck, support legs (not shown) are erected at predetermined intervals in two horizontal directions, and the joists 10 and 10 are arranged on the support legs in parallel. The flooring 1 is installed between them (see FIG. 3). At this time, a clearance of 5 mm or more is provided between the flooring materials 1 and 1 so that water that has permeated into the hollow portion 3 is drained from the clearance to the outside.
However, if the air permeability is poor or the drainage groove is blocked by fallen leaves, dust, etc., and the drainage is poor, water penetrates into the flooring 1 due to the capillary phenomenon, and the flooring 1 expands, and the clearance is completely eliminated. Occasionally, there will be situations where they disappear. However, in the present invention, as shown in FIG. 3, even when there is no clearance at all, water is drained to the outside from the notch portion 6 communicating with the hollow portion 3, so that water does not accumulate in the hollow portion 3. The flooring 1 does not warp or crack.

Next, another embodiment of the flooring according to the present invention will be described.
In FIG. 4, the sectional side view of other embodiment of the flooring which concerns on this invention is shown.
In this embodiment, in order to improve the appearance, the forehead 2 is closed with the blindfold plate 12 so that the hollow portion 3 cannot be seen. At this time, in order to secure a bonding area between the blindfold 12 and the flooring 1, a slit 11 communicating with the hollow part 3 is formed in the bottom surface 8 of the flooring 1 in the width direction of the flooring 1 instead of the notch. ing.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit thereof. For example, in the above embodiment, the flooring has a rectangular cross section, but it goes without saying that other cross sectional shapes such as a square may be used. Moreover, in said embodiment, although the character-shaped partition wall of the cross section 8 which partitions a hollow part is provided, the shape of a partition wall may be another shape, or a partition wall may be eliminated. Furthermore, in the above embodiment, the slits are provided in the width direction of the floor material, but may be provided in the longitudinal direction. In short, it is only necessary to obtain the desired function in the present invention.

It is the perspective view which looked at the flooring concerning the present invention from the bottom side. It is a side view of the flooring concerning the present invention. It is a block diagram of the outdoor deck using the flooring which concerns on this invention. It is a sectional side view which shows other embodiment of the flooring which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor material 2 Small opening 3 Hollow part 4, 5 Partition wall 6 Notch part 7 Recessed part 8 Bottom face 9 Groove 10 joist 11 Slit 12 Blindfold board D Depth

Claims (2)

Formed a mixed material of wood flour and plastic obtained from waste material extruded by extending longitudinally, in flooring which have a hollow portion opening at small,
When the clearance provided between the floor materials that are continuously provided disappears due to the expansion of the floor material, a notch for draining the water that has permeated the hollow portion to the outside is formed at the lower end of the small edge . Flooring characterized by Formed a mixed material of wood flour and plastic obtained from waste material extruded by extending longitudinally, in flooring which have a hollow portion opening at small,
A floor formed with a slit on the bottom surface for draining water that has permeated into the hollow part to the outside when the clearance provided between the floor materials arranged in series is lost due to expansion of the floor material. Wood.

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