JP2000220276A - Floor backing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent moisture from the underfloor and to improve strength. SOLUTION: In this floor backing structure, a plurality of support legs 5 are fitted to a floor backing panel 10 with moisture proof layer 2 formed of a polyolefine resin sheet 21 at least on the underfloor side lower face of a hygroscopic base 1. The support legs 5 of a plurality of floor backing panels 10 are grounded on a floor foundation bed 7 to lay the floor backing panels 10 with a space provided between the floor foundation bed 7 and the floor backing panels 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor structure provided at a predetermined height from a floor base such as a concrete slab.

[0002]

2. Description of the Related Art There is known a floor base structure constructed by a so-called floor-laying method in which floor base panels having supporting legs attached to a hygroscopic substrate made of plywood or particle board of a predetermined size are arranged side by side on a concrete slab. Have been. In such a floor placement method, there is also a floor foundation structure constructed by a so-called space construction method in which adjacent floor foundation panels are laid side by side at predetermined intervals without abutting each other. In any case, a finishing material is stuck on the floor base panel to form a floor structure. In the space construction method, a discard material is stuck on the floor base panel, and a finishing material is stuck on the discard material. In addition, in recent years, the import and price of South Sea wood have become unstable in order to prevent the destruction of tropical rain forests, and wood-based core boards such as particle boards and fiber boards have been used instead of plywood. More.

[0003]

SUMMARY OF THE INVENTION Moisture builds up between a concrete slab and an underfloor panel, and the hygroscopic substrate of the underfloor panel absorbs moisture, causing the substrate to stretch, shrink, warp, etc. Those using a wood board were inferior in strength, dimensional stability and moisture resistance.

Accordingly, an object of the present invention is to provide an underfloor structure in which the underfloor panel used in the floor placement method has a moisture-proof property from under the floor and has improved strength.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a floor base panel having a moisture-resistant layer formed of a sheet of a polyolefin resin on at least a lower surface of a floor under a floor of a hygroscopic substrate. Is mounted, the support legs of the plurality of floor base panels are grounded on the floor base, and the floor base panels are laid side by side with an interval between the floor base and the floor base panel.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the embodiment shown in FIG. 1, particle board, fiber board, OSB (oriented strand board), MDF (wood fiber board), plywood, gypsum board,
A moisture-resistant layer 2 is formed on the lower surface on the underside of a moisture-absorptive substrate 1 such as a cement plate or an asbestos plate, and paper 3 is attached on the upper surface on the upper side of the floor. The moisture-resistant layer 2 was a sheet 21 of a polyolefin resin. Examples of the polyolefin resin include polyethylene, polypropylene, polybutene-1, polyisobutylene, poly-4-methyl-1-pentene, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, ethylene / propylene copolymer, Ethylene-propylene-diene copolymer (EPDM), ethylene-butene copolymer, ethylene-butene-diene copolymer, etc. can be suitably used. In particular, polyethylene or polypropylene sheets are preferable in terms of moisture-proof property and cost. Can be used. For example, the thickness of the polyethylene sheet 21 is
About 10 to 30 μm is advantageous from the viewpoint of moisture resistance, cost, and ease of handling. Paper 3 has a basis weight of 20 to 1
Thin paper, kraft paper, ceramic paper, paper-to-paper reinforcing paper, titanium paper, etc. of about 00 g / m ² , preferably 20 to 70 g / m ² can be used. Particularly, paper having a rough surface such as kraft paper can be used. It is suitable because of good workability. In addition, from the viewpoint of workability, stiff paper having a basis weight of 100 g / m ² or more can be suitably used particularly for the upper surface.
Thin paper or kraft paper is suitable for realizing the inter-paper peel strength. When thick paper is used, separation between papers can be prevented by impregnating with a water repellent, for example, paraffin or SBR.

In order to attach the polyolefin resin sheet 21 to the hygroscopic substrate 1, the sheet 21 may be subjected to a plasma discharge treatment or a corona discharge treatment and then bonded using a general adhesive. By performing such a discharge treatment on the polyolefin-based resin sheet 21, the surface of the sheet 21 is activated and can be attached to the substrate 1 with an adhesive. When the sheet 21 not subjected to the discharge treatment is attached to the substrate 1, the sheet 21 cannot be adhered with an adhesive,
The sheet 21 is adhered to the surface of the substrate 1 to which the adhesive has been applied while the surface of the sheet 21 is being melted. However, the sheet 21 whose surface is melted is fluttered and difficult to handle, and the substrate 1
It was difficult to paste them on By performing the discharge treatment on the sheet 21, it is not necessary to melt the sheet 21, and thus the sheet 21 can be easily attached.

Paper 3 is provided on the upper and lower surfaces of the hygroscopic substrate 1.
A projection 4 is provided at a predetermined location on the lower surface of the floor base panel 10 to which the sheet 21 is adhered.
Are fitted. The support leg 5 is formed of a plastic cylinder, and a cushion rubber 6 is provided at a lower end thereof. The cushion rubber 6 of the support leg 5 is grounded on a floor base 7 such as a concrete slab, and the floor base 7 and the base panel 1 are grounded.
A predetermined interval is provided between the two.

Further, it is preferable to apply a water-repellent material or a waterproof material to the side surface (kiguchi) of the floor base panel 10 attached to the paper 3 or the sheet 21. Thereby, it becomes more excellent in moisture resistance performance. As a coating material, SBR, paraffin, acrylic resin, urethane resin, epoxy resin and the like are preferably used.

FIG. 2 shows a floor base panel 10 as shown in FIG.
Are laid out at intervals from each other, and the floor base structure is a so-called space construction method. On the floor base panels 10 laid out in this manner, a cut-off material (not shown) is usually attached, and a finishing material (not shown) is attached on the cut-off material.

In the embodiment shown in FIG.
, A polyethylene having a basis weight of 16 g / m ² was used as the sheet 21, and a paper 3 having a basis weight of 23 g / m ² was used as the paper 3. A vinyl acetate-based adhesive was applied to the lower surface of the substrate 1, a sheet 21 subjected to a discharge treatment was attached to the adhesive applied surface, and the whole was press-bonded to manufacture the floor base panel 10.

When a plywood is used as the moisture-absorbing substrate 1, wood-based core boards such as a particle board and a fiber board are superior to the plywood in terms of strength, dimensional stability and water resistance. These properties are inferior,
The range of use is limited. However, in the floor base panel 10 of the present invention, even when the wooden core board is used as the substrate 1, the strength can be improved due to the presence of the sheet 21 and the paper 3, the dimensional stability is improved, and the water resistance is further improved. The performance is also improved. Further, as the substrate 1, a material obtained by attaching plywood to both surfaces of a wooden core board can be used. In the present invention, the floor base panel 10
It is preferable to use a wooden core board as the moisture-absorbing substrate 1 from the viewpoint of cost reduction.

The moisture resistant layer 2 has a moisture permeability of 100 g /
m is preferably ² · 24h or less. This moisture permeability is measured based on the condition A of JIS Z0208. This JIS standard specifies a method of using a moisture-permeable cup for testing the moisture permeability of a packaging material such as a plastic film or processed paper for the purpose of moisture-proofing. Here, the moisture permeability refers to the amount of water vapor that permeates a unit area of a film material in a certain time. According to the JIS standard, a moisture-proof packaging material is used as a boundary surface at a temperature of 25 ° C. or 40 ° C. When the relative humidity was 90% and the air on the other side was kept dry by a moisture absorbent, the mass (g) of water vapor passing through this interface in 24 hours was converted into a value per 1 m ^{2 of} the material. The moisture permeability of the material.

FIG. 3 shows an example in which the moisture-resistant layer 2 is formed by laminating the paper 3 and the sheet 21 from the substrate 1 side. Conversely, the moisture-resistant layer 2 can be formed from a sheet 21 and a paper 3 laminated in this order. In this case, as shown in FIG. 4, the paper 3 wound around the roll 30 is sent out, and the molten olefin resin in the resin tank 32 is extruded onto the paper 3 on the drum 31 to laminate the sheet 21 on the paper 3. To form a laminated body. Next, the laminate (the sheet 21 and the paper 3) is passed between the electrodes 34 of the corona discharge device 33 and subjected to electric discharge machining. The laminate subjected to electric discharge machining is wound around a roll 35. The laminate wound around the roll 35 is cut into the size of the substrate 1 and the sheet 21 side is attached to the substrate 1 with an adhesive. The output of the corona discharge device 33 was 2,000 W, the processing time was 0.1 to 0.6 seconds, and the frequency was 45 KHz. However, the output was 10 to 5,000 W, the processing time was 0.01 to 30 seconds, and the frequency was 30 to It was possible to stick the sheet 21 to the substrate 1 with an adhesive within the range of 60 KHz.

In the embodiment shown in FIG.
An example in which a sheet of a polyolefin resin sandwiched between sheets of paper 3 is used is shown. These three moisture resistant layers 2
After the sheets 3 and one sheet 21 are laminated and passed through a hot roll to be fused, the three-layer sheet can be adhered to the lower surface of the hygroscopic substrate 1 with an adhesive. This three-layer laminate also has a moisture permeation resistance of 100 g / m ^2.
-The thing of 24h or less is preferable.

In each of the above-described embodiments, instead of adhering only the paper 3 on the upper surface of the hygroscopic substrate 1, a configuration in which a polyethylene sheet 21 is sandwiched between two sheets of paper 3 can be used. Twenty-one layers can also be attached.

FIG. 6 is a sectional view showing another embodiment. In this embodiment, the height of the floor base panel 10 can be adjusted by using bolts in which the upper and lower screws are reversely threaded as the support legs 5. It is shown. Paper 3 is adhered to the lower surface of the hygroscopic substrate 1, and a sheet 21 made of an olefin resin is attached to the paper 3.
Is affixed. This two-layer laminate also has a moisture permeation resistance of 100.
g ^/ m 2 · 24h or less being preferred. A sheet 21 subjected to discharge treatment is attached to the upper surface of the substrate 1, and a paper 3
Is affixed. A through hole 8 is formed at a predetermined position of the floor base panel 10, and a metal fitting 9 having a female screw formed on the inner peripheral surface thereof is fixed to the through hole 8 so that the upper screw of the support leg 5 is screwed into the through hole 8. Has become. The lower screw of the support leg 5 is screwed into a female screw formed on the inner peripheral surface of the metal fitting 11 fixed to the cushion rubber 6. FIG.
The relationship between the male screw and the female screw shown in the figure is opposite, that is, the male screw is projected from the floor base panel 10 side, the male screw is also projected from the cushion rubber 6 side, and the female screw is formed on the inner peripheral surface such that the upper and lower parts are reverse-threaded. A cylindrical member formed on the peripheral surface may be screwed into these male screws. In the two-layer portion on the lower surface of the floor base panel 10, the vertical relationship between the sheet 21 and the paper 3 may be reversed.

In each of the above-described embodiments, the moisture-resistant layer 2 has a single-layer structure (A) including only the polyolefin resin sheet 21;
A two-layer structure of the sheet 21 and the paper 3 (the order of the sheet and the paper is B,
The order of paper and sheets is C), and a three-layer structure (D) in which a sheet 21 is sandwiched between two sheets of paper 3 is shown. (On the floor).
The combination is

[Table 1] 16 types. Further, there is an example in which nothing is provided on the floor, and there are 24 possible combinations including an example in which only the paper 3 is provided. Among these combinations, the most effective in preventing moisture and preventing warpage were BC, BD, DC,
It was a combination of DD.

FIG. 7 shows a base panel 10 in which a moisture-resistant layer 2 is formed on the lower surface of the substrate 1. The base panel 10 is separated from the floor base 7 by a support leg 5 and a support plate 81 at a predetermined distance. Here is an example of opening and supporting. The base panels 10 are placed on the support plate 81 with a gap therebetween. Support leg 5
A rubber cushion 6 is provided at the lower end of the base material, and the rubber 6 is grounded to the floor base 7. A screw is cut on the outer periphery of the support leg 5, and this screw portion is screwed into the metal fitting 9. The metal fitting 9 is fixed to the support plate 81, is exposed from the upper end opening of the metal fitting 9, and is formed with a groove 5 </ b> A at the upper end of the support leg 5 with the face being seen through the gap between the base panels 10.
A level adjustment of the base panel 10 can be achieved by inserting a screwdriver into A and rotating the support leg 5 to either side. Further, the support plate 81 may be formed of a particle board, a plywood or a plastic material, and a rubber sheet or an adhesive sheet may be pasted on an upper surface thereof, that is, a surface in contact with the base panel 10. Further, the above-described moisture-resistant layer 2 can be provided on the lower surface of the support plate 81. Further, in the case of a low floor structure, the entire support leg 5 can be formed of rubber or the like. In this embodiment, the base panels 10 are spaced from each other, but may be abutted without leaving a gap.

FIG. 8 is a plan view of the example shown in FIG. 7, in which four corners and a middle part in the longitudinal direction of the rectangular base panel 10 are supported by a support plate 81, and the base panel 10 is aligned with its short sides. It is staggered so that it does not exist. On the base panel 10, a normal material is pasted, and a finishing material is pasted thereon. The shape of the support plate 81 is not limited to a square, but may be a circle or any other shape. The number of the support plates 81 is
Of course, it can be appropriately changed depending on the size of the base panel and the required rigidity.

The moisture-resistant layer 2 shown in FIG. 7 has a two-layer structure of only the sheet 21 and the sheet 21 and the paper 3 as described above.
Any of the three-layer structures in which the sheet 21 is sandwiched between sheets of paper can be adopted (combinations in Table 1). The moisture permeability of the moisture-resistant layer 2 is also set to 100 g / m ² · 24 h or less.

[0023]

As described above, according to the present invention, a plurality of support legs are attached to a floor base panel provided with a moisture-resistant layer made of a polyolefin resin sheet on at least the lower surface on the lower floor side of the moisture-absorbing substrate. Since the support legs of the plurality of floor base panels are grounded on the floor base and the floor base panels are laid out with a space between the floor base and the floor base panel, the hygroscopic substrate absorbs moisture from under the floor. Can be prevented, and the dimensional stability of the floor base panel can be ensured. In addition, in the case of a sheet and paper or paper attached to the upper surface of the floor above the moisture-absorbing substrate, there is a case where a wood-based core board such as a particle board or a fiber board having low strength is used as the moisture-absorbing substrate. However, since the strength is improved and the moisture resistance is also improved, it can be used for various applications. Also, if a laminate of paper and a sheet of polyolefin-based resin is used as the moisture-resistant layer, both are fused between hot rolls,
The paper side can be attached to the substrate with an adhesive, which prevents the substrate from absorbing moisture and is easy to manufacture. In addition, when the sheet is directly adhered to the substrate after performing the plasma discharge treatment or the corona discharge treatment, the work can be easily and securely adhered, and the surface does not have to be melted by heating.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a perspective view showing a state where floor base panels are laid on a floor base.

FIG. 3 is a sectional view showing another embodiment of the floor base panel.

FIG. 4 is a process diagram of a corona discharge treatment.

FIG. 5 is a sectional view showing still another embodiment of the floor base panel.

FIG. 6 is a sectional view showing another embodiment.

FIG. 7 is a sectional view showing still another embodiment.

FIG. 8 is a schematic plan view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hygroscopic board 2 Moisture resistant layer 3 Paper 5 Support leg 7 Floor base 10 Floor base panel 21 Sheet of polyolefin resin

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nobuaki Kaminishi 3133-1-1114, Irumagawa, Sayama-shi, Saitama (72) Inventor Hidefumi Yanagi Shinichi 3-5-604 Ogawa Higashicho, Kodaira City, Tokyo

Claims (7)

[Claims] A plurality of support legs are attached to a floor base panel having a moisture-resistant layer formed of a sheet of a polyolefin resin on at least a lower surface of a floor under a floor of a hygroscopic substrate, and the support legs of the plurality of floor base panels are mounted on the floor base. An underfloor structure, characterized in that the underfloor panels are laid side-by-side with a space between the floor base and the underfloor panels when grounded. 2. The floor substrate structure according to claim 1, wherein the moisture-resistant layer is formed by laminating a polyolefin-based resin sheet and paper in this order from the moisture-absorbing substrate side or in the reverse order. . 3. The floor substrate structure according to claim 1, wherein the polyolefin-based resin sheet is subjected to plasma discharge treatment or corona discharge treatment and then attached to a hygroscopic substrate. 4. The floor substrate structure according to claim 1, wherein the moisture-resistant layer is formed by sandwiching a polyolefin resin sheet between two sheets of paper. 5. The moisture-resistant layer has a moisture permeability of 100 g / m ² ···
The underfloor structure according to any one of claims 1 to 4, wherein the length is 24 hours or less. 6. A sheet made of paper or a polyolefin resin adhered to the upper surface of the upper floor of a hygroscopic substrate, or a sheet of paper and a polyolefin resin laminated.
The underlayer structure according to any one of claims 1 to 5, wherein a sheet in which a polyolefin resin sheet is sandwiched between sheets of paper is attached. 7. The floor substrate structure according to claim 1, wherein polyethylene or polypropylene is used as said polyolefin resin.