JP2000145103A - Laying floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a floor substrate panel absorb moisture under the floor, and eliminate a fear of dimensional stability caused by the occurrence of expansion, contraction, and warpage by forming the floor substrate panel with a moisture-proofing layer formed on the lower surface of a moisture-absorbing base plate, and forming the moisture-proofing layer of a polyolefin resin sheet. SOLUTION: A floor substrate panel 2 being resiliently supported by short legs 1 is placed on a floor baserock 3, and flooring material 4 is provided on the panel 2. Also, panel 2 is that a moisture-proofing layer 6 is formed on the lower surface of a moisture-absorbing base plate 5, and the moisture proofing layer 6 is formed of a polyolefin resin sheet 7, then adhering paper 8 on the upper surface of the moisture-absorbing base plate 5. Herein, in order to adhere the polyolefin resin sheet 7 to the moisture-absorbing base plate 7, the sheet 7 is activated by a plasma discharge treatment and corona discharge treatment to be adhered by an adhesive. In this manner, by carrying out a discharge treatment to the sheet 7, melting is not required, and adhering work becomes easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called low-floor flooring structure in which a floor base panel supported by an elastic body is placed on a floor base such as a concrete slab and a finishing material is provided on the floor base panel. .

[0002]

2. Description of the Related Art There is known a low-floor type floor structure in which a floor base panel is placed on a floor base such as a concrete slab and a finishing material is provided on the floor base panel. As the floor base panel, a wood-based core board such as a particle board, a fiber board, an OSB or an MDF, which is inexpensive and has a stable supply, is often used. The wooden core board is
Although it is inferior to plywood in terms of strength, dimensional stability, water resistance, etc., the timber used for plywood is restricted in felling to protect tropical rainforests, and its price and supply are unstable.

[0003]

When a wood-based material having a hygroscopic property, including plywood, is used as a material of the floor base panel, it absorbs moisture under the floor, causing expansion, shrinkage, warpage, etc., and dimensional stability. Lack of sex. Further, when the floor base panel is formed of a wood-based core board, there is a drawback that strength is inferior to plywood.

Accordingly, an object of the present invention is to provide a floor-standing structure having excellent strength and dimensional stability and sufficient moisture resistance.

[0005]

In order to achieve the above-mentioned object, the present invention places a floor base panel elastically supported by short legs on a floor base and provides a finishing material on the floor base panel. In the floor-standing structure, a floor base panel is formed by forming a moisture-resistant layer on at least the lower surface of a moisture-absorbing substrate, and the moisture-resistant layer is formed of a polyolefin-based resin sheet.

[0006]

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

In the embodiment shown in FIG. 1, a floor base panel 2 elastically supported by short legs 1 is placed on a floor base 3, and a finishing material 4 is provided on the floor base panel 2. The height H of the floor surface from the floor base 3 is 100 mm or less. Floor base panel 2
Has a moisture-resistant layer 6 formed on the lower surface of the hygroscopic substrate 5. The moisture resistant layer 6 is formed of a polyolefin resin sheet 7. Further, paper 8 is attached to the upper surface of the hygroscopic substrate 5. As the hygroscopic substrate 5, use is made of a wood-based core board such as particle board, fiber board, OSB (oriented strand board), MDF (wood fiber board), plywood, gypsum board, cement board, asbestos board and the like. Can be. Examples of the polyolefin resin adhered to the lower surface of the hygroscopic substrate 5 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 preferably used, and in particular, A polyethylene or polypropylene sheet can be preferably used in terms of moisture resistance and cost. For example, the thickness of the polyethylene sheet 7 is preferably about 10 to 30 μm from the viewpoint of moisture resistance, cost, and ease of handling. The paper 8 has a basis weight of about ²⁰ to 100 g / m ² ,
Preferably, thin paper of ^{20 to} 70 g / m ² , kraft paper, ceramic paper, inter-sheet reinforcing paper, titanium paper, or the like can be used. In particular, paper having a rough surface such as kraft paper does not slip and has good workability. Suitable for. 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 7 to the hygroscopic substrate 5, the sheet 7 may be subjected to a plasma discharge treatment or a corona discharge treatment and then bonded using a general adhesive. By performing such discharge treatment on the polyolefin-based resin sheet 7, the surface of the sheet 7 is activated and can be attached to the substrate 5 with an adhesive. When the sheet 7 not subjected to the discharge treatment is attached to the substrate 5, the sheet 7 cannot be adhered with an adhesive, and is attached to the surface of the substrate 5 to which the adhesive has been applied while the surface of the sheet 7 is melted. However, the sheet 7 whose surface has been melted
Was fluttered and was difficult to handle, and it was difficult to attach it to the substrate 5. By performing a discharge treatment on the sheet 7,
Since there is no need for melting, the sticking operation is also facilitated.

Further, it is preferable to apply a water-repellent material or a waterproof material to the side surface (kiguchi) of the floor base panel 2 attached to the paper 8 or the sheet 7. 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.

In the embodiment shown in FIG. 1, rubber feet are attached to the four corners of the floor base panel 2 as the legs 1, but the material for forming the legs 1 is urethane, concrete, or the like. Styrofoam, wood, springs, air cushions, etc. can also be used. In the embodiment shown in FIG. 1, the floor base panels 2 are placed on top of each other, and the stiff paper 8 is attached to the upper surface thereof.
The finishing material 4 can be directly pasted on the paper 8.

In the embodiment shown in FIG.
, A polyethylene having a basis weight of 16 g / m ² was used as the sheet 7, and a sheet 8 having a basis weight of 23 g / m ² was used as the paper 8. A vinyl acetate-based adhesive was applied to the lower surface of the substrate 5, a discharge-treated sheet 7 was attached to the adhesive-applied surface, and the whole was pressure-bonded to produce the floor panel 2.

FIG. 2 is a cross-sectional view showing another example of the structure of the floor base panel 2, in which a moisture-resistant layer 6 formed on the lower surface of a moisture-absorbent substrate 5 is a laminate of paper 8 and a polyolefin resin sheet 7. The sheet 7 and the paper 8 are stacked on the upper surface of the substrate 5 in this order. The paper 8 and the sheet 7 can be melted by passing between the hot rolls, or the paper 8 and the sheet 7 can be bonded using an adhesive. In addition, as an adhesive to be used, in addition to an inexpensive vinyl acetate-based adhesive, an ethylene-vinyl acetate copolymer (EV
A) Adhesives mainly composed of olefin resins can also be used. In order to attach the sheet 7 to the upper surface of the substrate 5, the sheet 7 is subjected to a plasma discharge treatment and then bonded with an adhesive.

As shown in FIG. 3, the moisture-resistant layer 6 shown in FIG. 2 feeds out the paper 8 wound around the roll 30 and extrudes the molten olefin resin in the resin tank 32 onto the paper 8 on the drum 31. To form a laminate in which the sheet 7 is laminated on the paper 8. Next, the laminate (the sheet 7 and the paper 8) 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 5 and the sheet 7 is attached to the substrate 5 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 attach the sheet 7 to the substrate 5 with an adhesive within the range of 60 KHz.

In the embodiment shown in FIG.
An example in which a polyolefin resin sheet 7 is sandwiched between sheets of paper 8 is shown. The three-layer moisture-resistant layer 6 is fused by passing between two heat rolls in a state in which two sheets of paper 8 and one sheet 7 are laminated, and then the three-layer sheet is attached to the lower surface of the hygroscopic substrate 5. Can be attached with an adhesive.

Any of the above-described one-layer, two-layer and three-layer moisture resistance
Layer 6 also has a moisture permeability of 100 g / m. ²・ 24 hours or less
Preferably. This moisture permeability is based on JIS Z 020
The measurement is performed based on the condition A of 8. This JIS standard is
For the purpose of moisture-proofing plastic film, processed paper, etc.
Use a moisture permeable cup to test the moisture permeability of the packaging material
Stipulates the method to be used. Where moisture permeability
Is the amount of water vapor that permeates a unit area
In this JIS standard, the temperature is 25 ° C or 40 ° C
The moisture-proof packaging material is used as the boundary surface in
Relative humidity 90%, air on the other side dried with a moisture absorbent
Water vapor passing through this interface for 24 hours
The mass (g) of qi is 1 m²Value converted to per
Is the moisture permeability of the material.

In another embodiment shown in FIG. 5, the floor base panels 2 are placed at a predetermined distance 9 from each other, and a metal fitting 10 is provided at a space 9 between adjacent floor base panels 2. The upper part of the support bolt 11 is rotatably attached to the metal fitting 10,
The male threaded portion on the lower end side of the support bolt 11 is screwed into a member 12 having a female thread on the inner peripheral surface, and this member 12 is attached to a cushion member 13. The underfloor space is widened by rotating the support bolt 11 in one direction, and the underfloor space is narrowed by rotating the support bolt 11 in the other direction, that is, the height can be adjusted. The legs 1 are constituted by members indicated by reference numerals 10 to 13. When the floor base panels 2 are placed at intervals 9 without abutting in this way, a pruning material 14 is attached to the upper surface of the floor base panel 2, and the finishing material 4 is provided on the piling material 14.

In each of the above embodiments, the moisture-resistant layer 6 has a single-layer structure (A) composed of only the polyolefin resin sheet 7;
Two-layer structure of sheet 7 and paper 8 (the order of sheet and paper is B,
The order of paper and sheets is C), and a three-layer structure (D) in which a sheet 7 is sandwiched between two sheets of paper 8 is shown. (On the floor). The combination is

[Table 1] 16 types. Furthermore, there is an example in which nothing is provided on the floor, and 24 combinations are possible including an example in which only the paper 8 is provided. Among these combinations, the most effective in preventing moisture and preventing warpage were BC, BD, DC,
It was a combination of DD.

[0018]

As described above, according to the present invention, the floor panel is formed by forming a moisture-resistant layer on at least the lower surface of the moisture-absorbing substrate and forming the moisture-resistant layer from a polyolefin resin sheet. The panel does not absorb moisture under the floor, and may be stretched, shrunk, warped, or the like, and the dimensional stability may not be impaired. In addition, the formation of the moisture resistant layer can improve the strength of the floor base panel itself. In the case where the moisture-resistant layer is formed of two layers of a sheet and paper, when the sheet is formed of polyethylene or polypropylene, it can be heat-pressed with paper, and is easy to handle at low cost and excellent in moisture resistance. . Furthermore, in the case where at least paper is attached to the upper surface of the moisture-absorbing substrate, the dimensional stability and strength are further improved, and the finishing material can be directly provided on the paper without using a discard material. 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 cross-sectional view showing another example of the floor base panel.

FIG. 3 is a process chart of a corona discharge treatment.

FIG. 4 is a sectional view showing still another embodiment of the floor base panel.

FIG. 5 is a sectional view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg part 2 Floor base panel 3 Floor base 4 Finishing material 5 Hygroscopic board 6 Moisture resistant layer 7 Polyolefin resin sheet

 ──────────────────────────────────────────────────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] 1. A floor placement structure in which a floor base panel elastically supported by short legs is placed on a floor base and a finishing material is provided on the floor base panel, wherein the floor base panel is formed of at least a hygroscopic substrate. A floor-standing structure, wherein a moisture-resistant layer is formed on a lower surface, and the moisture-resistant layer is formed of a polyolefin-based resin sheet. 2. The floor-standing 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 hygroscopic substrate side or in the reverse order. 3. The floor-standing structure according to claim 1, wherein the polyolefin resin sheet is subjected to plasma discharge treatment or corona discharge treatment and then attached to a hygroscopic substrate. 4. The floor-standing structure according to claim 1, wherein the moisture-resistant layer has a sheet made of a polyolefin resin sandwiched between two sheets of paper. 5. The moisture-resistant layer has a moisture permeability of 100 g / m ² ···
The floor placing 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 sheet adhered to the upper surface of the floor above the hygroscopic substrate, or a sheet made of paper and a polyolefin resin sheet laminated thereon.
The floor-standing structure according to any one of claims 1 to 5, wherein a sheet made of a polyolefin resin sheet sandwiched between sheets of paper is attached. 7. The floor structure according to claim 1, wherein polyethylene or polypropylene is used as the polyolefin resin.