Mattress construction

Abstract

Facilitate the fitting of the female and male fruits to improve workability. 【Solution means】It contains a vinyl chloride resin of 20% to 30% by mass that does not contain a plasticizer and calcium carbonate of 70% to 80% by mass, and includes a base material 10 with a thickness of 4 mm to 6 mm. A female fruit Ja having a concave portion C and a male fruit Jb having a convex portion R are provided at side end portions along a pair of opposite sides in a plan view of the base material 10. The female fruit Jb has a concave portion C, an upper jaw portion 10a, and a lower jaw portion 10b. In the concave portion C, both side surfaces sandwiching the bottom portion G are inclined such that the width along the thickness direction of the base material 10 gradually widens toward the opening side. In the convex portion R, both side surfaces sandwiching the top portion H are inclined such that the width along the thickness direction of the base material 10 gradually narrows toward the tip side. The length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is larger than the thickness Ta from one surface of the base material 10 to the other surface side of the top portion H of the base material 10.

Description

Technical Field

[0001] The present invention , Floor relates to a floor covering construction structure.

Background Art

[0002] In recent years, from the viewpoint of environmental protection and the like, floor materials using a hard SPC (Stone Plastic Composite) base material mainly made of natural stone powder such as calcium carbonate have attracted attention.

[0003] For example, Patent Document 1 discloses a vinyl composition tile for floor finishing containing 100 parts by mass of vinyl chloride resin, 400 to 600 parts by mass of calcium carbonate, and 20 to 40 parts by mass of a fatty acid alkyl ester plasticizer.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in floor materials using a hard base material such as an SPC base material, when performing actual processing on the end face of the base material and sticking it to the floor surface such as a slab, for example, it is difficult to fit the female part of the already pasted floor material and the male part of the floor material to be pasted next in order, so there is room for improvement in workability.

[0006] The present invention has been made in view of such points, and an object thereof is to make it easier to fit the female part and the male part and improve workability.

Means for Solving the Problems

[0007] In order to achieve the above object, the floor material according to the present invention Construction Structure is A floor material construction structure comprising a floor base and a plurality of floor materials installed on the floor base above the floor base so as to fit into each other, wherein the floor materials are It contains 20% to 30% by mass of a vinyl chloride resin without a plasticizer and 70% to 80% by mass of calcium carbonate, and has a rectangular plate-shaped substrate with a thickness of 4 mm to 6 mm in a plan view. A female member having a recess is provided at a side end along one of a pair of opposite sides in the plan view of the substrate, and a male member having a protrusion that fits into the recess is provided at a side end along the other of the pair of sides. The female member has the recess, an upper jaw portion provided on one surface side of the substrate of the recess, and a lower jaw portion provided on the other surface side of the substrate of the recess and protruding toward the opening side of the recess more than the upper jaw portion. and The recess has side surfaces on both sides sandwiching the bottom inclined such that the width along the thickness direction of the substrate gradually widens toward the opening side, and the protrusion has side surfaces on both sides sandwiching the top inclined such that the width along the thickness direction of the substrate gradually narrows toward the tip side. The length of the lower jaw portion protruding from the upper jaw portion is larger than the thickness from one surface of the substrate to the other surface side of the top of the substrate. and a gap is provided between the top of the male joint of one of the pair of adjacent floor materials of the plurality of floor materials and the floor base side, and between the bottom of the female joint of the other floor material and the floor base side, and a modified silicone-based adhesive is provided between the floor base and the plurality of floor materials.

[0008] According to the above configuration, since the base material in the shape of a rectangular plate in plan view with a thickness of 4 mm to 6 mm contains a vinyl chloride resin of 20% to 30% by mass without a plasticizer and 70% to 80% by mass of calcium carbonate, it is possible to form a hard so-called SPC base material with excellent dimensional stability. And in that base material, a female joint having a recess is provided at a side end along one of a pair of opposite sides in plan view, and a male joint having a protrusion that fits into the recess is provided at a side end along the other of the pair of opposite sides in plan view. Here, the female joint has a recess into which the protrusion of the male joint fits, an upper jaw portion provided on one surface side of the base material of the recess, and a lower jaw portion provided on the other surface side of the base material of the recess and protruding to the opening side of the recess rather than the upper jaw portion. The length of the lower jaw portion protruding from the upper jaw portion is larger than the thickness from one surface of the base material to the other surface side of the top of the base material. Therefore, when sequentially pasting a plurality of floor materials on the floor under the floor through an adhesive, for example, by bringing the floor material (male joint) to be pasted next in order closer to the already pasted floor material (female joint) from obliquely above, the lower end of the top of the protrusion of the male joint of the floor material to be pasted next can be surely brought into contact with the upper surface of the lower jaw portion (on one surface side of the base material) of the female joint of the already pasted floor material. Further, in the recess of the female joint, the side surfaces on both sides sandwiching the bottom are inclined so that the width along the thickness direction of the base material gradually widens toward the opening side, and in the protrusion of the male joint, the side surfaces on both sides sandwiching the top are inclined so that the width along the thickness direction of the base material gradually narrows toward the tip side. Therefore, while moving the lower end of the top of the protrusion of the male joint so as to slide on the lower side surface (upper surface of the lower jaw portion) of the recess of the female joint, and by tilting the floor material to be pasted next so that the floor materials are in the same plane, the protrusion of the male joint can be easily fitted into the recess of the female joint. As a result, the predetermined portion (lower end of the top of the protrusion) of the male joint of the floor material to be pasted next can be surely brought into contact with the predetermined portion (upper surface of the lower jaw portion) of the female joint of the already pasted floor material, and the protrusion of the male joint can be easily fitted into the recess of the female joint. Thus, it is easy to fit the female joint and the male joint together, and the workability can be improved.In addition, in the recess of the female fruit, the side surfaces on both sides sandwiching the bottom are inclined such that the width along the thickness direction of the base material gradually widens toward the opening side, and in the convex portion of the male fruit, the side surfaces on both sides sandwiching the top are inclined such that the width along the thickness direction of the base material gradually narrows toward the tip side. Therefore, the strength of the upper jaw part and the lower jaw part of the female fruit, as well as the convex part of the male fruit, is ensured, and their breakage can be suppressed. In addition, since a modified silicone-based adhesive is provided between the floor base and the plurality of floor materials installed so as to fit into each other, unevenness adjustment of the plurality of floor materials can be performed with a high-viscosity modified silicone-based adhesive. Further, in each floor material, the length of the lower jaw protruding from the upper jaw is larger than the thickness from one surface of the base material to the other surface of the top base material, so that the modified silicone-based adhesive disposed on the back surface of the floor material can be prevented from protruding to the surface of the floor material.

[0009] The length of the lower jaw part protruding from the upper jaw part may be greater than the thickness of the base material.

[0010] According to the above configuration, since the length of the lower jaw part protruding from the upper jaw part is greater than the thickness of the base material, the lower end of the top of the convex part of the male fruit of the floor material to be successively pasted on the upper surface (on one surface side of the base material) of the lower jaw part in the female fruit of the floor material already pasted can be more surely brought into contact.

[0011] On one surface of the base material, a protective layer containing spherical glass beads is provided, and the average particle diameter of the beads may be 1.0 times to 1.5 times the thickness of the protective layer.

[0012] According to the above configuration, a protective layer containing spherical glass beads is provided on one surface of the base material, and the average particle diameter of the beads is 1.0 to 1.5 times the thickness of the protective layer. Therefore, the surface of the protective layer becomes uneven due to the spherical beads, which can suppress the wear of the shoe sole when stepping on the floor material with bare feet, impart anti-slip performance, and impart scratch resistance to the coating film surface. Here, when the average particle diameter of the beads is smaller than 1.0 times the thickness of the protective layer, the beads are likely to be buried in the protective layer, resulting in a decrease in anti-slip performance and scratch resistance. Also, when the average particle diameter of the beads is larger than 1.5 times the thickness of the protective layer, the beads are likely to fall off from the protective layer, leading to a decrease in anti-slip performance and scratch resistance, and dirt is likely to accumulate in the depressions where the beads have fallen off on the protective layer. Furthermore, since the beads are spherical with a predetermined size (average particle diameter of 1.0 to 1.5 times the thickness of the protective layer), it is difficult for dirt to adhere to the surface of the protective layer. Even if dirt adheres to the surface, it can be easily wiped off.

[0013] Between the above protective layer and the above base material, a projecting plate and a waterproof sheet may be provided in order from the base material side.

[0014] According to the above configuration, since the projecting plate and the waterproof sheet are provided in order from the base material side between the protective layer and the base material, the projecting plate can impart design to the surface of the floor material, and the waterproof sheet can suppress the discoloration of the projecting plate due to water absorption.

[0015] A decorative sheet may be provided between the above protective layer and the above base material.

[0016] According to the above configuration, since a decorative sheet is provided between the protective layer and the base material, the decorative sheet can impart design to the surface of the floor material 。

Advantages of the Invention

[0017] According to the present invention, since the length of the lower jaw portion protruding from the upper jaw portion in the female fruit is greater than the thickness from one surface of the base material to the other surface side at the top of the convex portion in the male fruit, it is easier to fit the female fruit and the male fruit together, and the workability can be improved.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiments.

[0020] 《First Embodiment》 FIG. 1 shows a first embodiment of a floor material and a floor material construction structure according to the present invention. Here, FIG. 1 is a cross-sectional view of the floor material 50a of the present embodiment and the floor material construction structure S including the same.

[0021] As shown in FIG. 1, the floor material 50a includes a base material 10, a projecting plate 15, a waterproof sheet 20a, and a protective layer 30 that are sequentially provided on the base material 10.

[0022] The base material 10 contains 20% to 30% by mass of vinyl chloride resin (CAS No. 9002-86-2) that does not contain a plasticizer and 70% to 80% by mass of calcium carbonate (CAS No. 471-34-1), and is provided in a plate shape with a thickness of 4 mm to 6 mm and a rectangular shape in plan view (for example, a rectangle with a length of about 900 mm and a width of about 150 mm). Further, on one side end portion (end face) along one of the pair of opposing long sides of the base material 10, a female socket Ja (see FIG. 1) is provided, and on one side end portion (end face) along one of the pair of opposing long sides, a male socket Jb (see FIG. 1) is provided. Furthermore, on one side end portion (end face) along one of the pair of opposing short sides of the base material 10, a female socket Ja (see FIG. 1) is provided, and on one side end portion (end face) along one of the pair of opposing short sides, a male socket Jb (see FIG. 1) is provided. Here, as the vinyl chloride resin, as long as it does not contain a plasticizer, either virgin resin or recycled resin can be used. As the calcium carbonate, for example, powder produced by pulverizing general limestone can be used, but powder obtained by pulverizing and purifying shells or the like can also be used. Also, when the content of the vinyl chloride resin is less than 20% by mass, since the content of calcium carbonate is too high, it becomes difficult to uniformly knead the vinyl chloride resin and calcium carbonate. Further, when the content of the vinyl chloride resin is more than 30% by mass, since the resin content increases, in particular, the dimensional change with respect to temperature becomes large, and the environmental influence becomes large. The base material 10 is a so-called SPC base material, which is composed of vinyl chloride resin and calcium carbonate and is difficult for moisture to penetrate, so the dimensional change with respect to humidity is small and the dimensional stability is excellent.

[0023] As shown in FIG. 1, the female socket Ja has a concave portion C, an upper jaw portion 10a provided on one surface side (negative side in the Y direction in the figure) of the base material 10 of the concave portion C, and is provided on the other surface side (positive side in the Y direction in the figure) of the base material 10 of the concave portion C, and has a lower jaw portion 10b that protrudes toward the opening side (positive side in the X direction in the figure) of the concave portion C from the upper jaw portion 10a. Here, as shown in FIG. 1, the concave portion C has side surfaces on both sides sandwiching the bottom G that are inclined so that the width along the thickness direction (Y direction in the figure) of the base material 10 gradually widens toward the opening side (positive side in the X direction in the figure).

[0024] As shown in FIG. 1, the male Jb has a convex portion R that fits into the concave portion C. Here, as shown in FIG. 1, the convex portion R has side surfaces on both sides sandwiching the top portion H that gradually narrow in width along the thickness direction (Y direction in the figure) of the base material 10 toward the tip side (negative side in the X direction in the figure). The inclination angle of the side surface of the convex portion R with respect to the surface of the base material 10 is the same as the inclination angle of the side surface of the concave portion C (fitting into the convex portion R) with respect to the surface of the base material 10, as shown in FIG. 1.

[0025] In the base material 10 having the above configuration, the length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is, for example, about 5 mm, and as shown in FIG. 1, the thickness Ta from the surface of one side (negative side in the Y direction in the figure) of the base material 10 to the other surface side (positive side in the Y direction in the figure) of the base material 10 at the top portion H is preferably larger than the thickness Tb of the base material 10.

[0026] The protruding plate 15 is formed to a thickness of 0.2 mm to 0.4 mm from porous woods such as beech, elm, cherry, oak, Katsura, or paulownia, or ring-porous woods such as oak or white oak. Further, as the protruding plate 15, a so-called dried protruding plate with a moisture content of 10% or less is used. This moisture content is the so-called absolute dry moisture content and is defined as moisture content / absolute dry mass × 100 (%). Here, when sticking a so-called raw protruding plate (high moisture content protruding plate) with a high moisture content, moisture is volatilized all at once with a large amount of heat by hot press. However, in this embodiment, in order not to cause thermal deformation of the base material 10, it is pressed at room temperature (for example, under an atmospheric temperature condition of about 10°C to 45°C) or by instantaneous hot pressing (for example, pressing with a hot plate at 100°C to 130°C for about 5 seconds to 10 seconds), so moisture is difficult to escape. Therefore, if a raw protruding plate is used as the protruding plate 15, there is a risk that the moisture content of the protruding plate is too high and the protruding plate may change color. Further, when the thickness of the protruding plate 15 is less than 0.2 mm, it becomes difficult to produce a protruding plate 15 with a uniform thickness, and the protruding plate 15 is likely to crack due to drying, making stable production difficult. Further, when the thickness of the protruding plate 15 is greater than 0.4 mm, the expansion and contraction due to humidity become large, so warping may occur in the floor material 50a due to repeated drying and wetting, and the protruding plate 15 may peel off. Note that the protruding plate 15 is adhered to one surface of the base material 10 using, for example, a polyurethane-based reactive hot melt adhesive or the like.

[0027] The waterproof sheet 20a is formed of, for example, a resin film such as an olefin resin with a thickness of about 150 μm. Note that the waterproof sheet 20a is adhered to the surface of the protruding plate 15 using, for example, a polyurethane-based reactive hot melt adhesive or the like.

[0028] As shown in FIG. 1, the protective layer 30 includes, for example, a protective layer main body formed of an acrylic resin or the like, and glass solid or hollow spherical beads B dispersed and contained in the protective layer main body, and is provided to a thickness of about 10 μm to 20 μm. Here, the protective layer 30 is formed by applying a coating liquid in which beads B are added to an acrylic resin or the like to the surface of the waterproof sheet 20a and drying and curing it.

[0029] The average particle diameter of the beads B is 1.0 to 1.5 times the thickness of the protective layer 30. Here, when the average particle diameter of the beads B is smaller than 1.0 times the thickness of the protective layer 30, the beads B are likely to be buried in the protective layer 30, and the anti-slip performance and scratch resistance will deteriorate. Also, when the average particle diameter of the beads B is larger than 1.5 times the thickness of the protective layer 30, the beads B are likely to fall off from the protective layer 30, and the anti-slip performance and scratch resistance will deteriorate. In addition, dirt is likely to accumulate in the depressions where the beads B have fallen off in the protective layer 30.

[0030] The floor material 50a described above is directly applied to a floor base F such as a concrete slab, etc., to form a floor material application structure S. Here, as shown in FIG. 1, the floor material application structure S includes a floor base F and a plurality of floor materials 50a installed so as to be fitted to each other by female fruits Ja and male fruits Jb, and an adhesive 5 such as a modified silicone-based material is provided between the floor base F and the plurality of floor materials 50a.

[0031] Next, a method for manufacturing the floor material 50a of the present embodiment will be described. The method for manufacturing the floor material 50a of the present embodiment includes a base material forming step, an attaching step, a cracking step, a chamfering step, a fruit processing step, and a painting step.

[0032] <Base material forming step> With respect to the total amount of the kneaded material, 20% to 30% by mass of vinyl chloride resin and 70% to 80% by mass of calcium carbonate are kneaded by, for example, a kneader mixer or a roll mixer, and then extruded from a mold as a plate-shaped molded body by extrusion molding. By adjusting the thickness with a metal rotating roll while cooling the plate-shaped molded body, a base material (10) having a thickness of 4 mm to 6 mm is formed. Here, in order to uniformly knead the calcium carbonate with the vinyl chloride resin, the average particle diameter D 50 is preferably 0.1 μm to 10 μm, but the particle diameter becomes finer due to the rubbing of the calcium carbonate particles against each other during the kneading process.

[0033] <Attaching step> After applying, for example, a polyurethane-based reactive hot melt adhesive or the like to one surface of the base material (10) formed in the above base material forming step, a butt plate (15) with a moisture content of 10% or less and a thickness of 0.2 mm to 0.4 mm is attached. Subsequently, after applying, for example, a polyurethane-based reactive hot melt adhesive or the like, a waterproof sheet (20a) is attached. Further, by compacting at room temperature (pressurizing with a load of about 1 MPa to 10 MPa), a laminated integrated body is formed to form an attached body. Here, room temperature refers to the normal atmospheric temperature without heating, cooling, etc., for example, a temperature in the range of 10°C in winter to 45°C in summer.

[0034] <Small cutting step> The attached body formed in the above attachment step is cut into a predetermined size using a processing machine such as a rotary saw, etc., to be divided into a plurality in plan view to form a divided body having a rectangular shape in plan view.

[0035] <Chamfering process> On the four peripheral edges of the surface on the waterproof sheet (20a) side of the divided body formed in the above small cutting step, chamfering is performed using, for example, a rotary saw or the like to form a chamfered body.

[0036] <Actual processing step> On the four end faces of the chamfered body formed in the above chamfering process, a male joint Ja or a female joint Jb is formed using a processing machine such as a rotary saw or the like to perform actual processing to form an actual processed body.

[0037] <Painting process> After applying an ultraviolet curable paint made of, for example, an acrylic resin containing beads B or the like to the surface of the waterproof sheet 20a in the actual processed body formed in the above actual processing step, the ultraviolet curable paint is cured by irradiation with ultraviolet rays to form a protective layer 30.

[0038] In the above manner, the floor material 50a of the present embodiment can be manufactured.

[0039] Next, the construction method of the floor material 50a of the present embodiment will be described.

[0040] First, an adhesive 5 such as a modified silicone-based adhesive is applied in a bead shape onto the surface of the subfloor F, and then the first floor material 50a is installed.

[0041] Subsequently, the next floor material 50a is brought closer to the first floor material 50a from obliquely above so that the lower end of the top H of the convex portion R in the male fruit Jb of the next floor material 50a abuts on the upper surface of the lower jaw portion 10b of the female fruit Ja of the first floor material 50a.

[0042] Furthermore, with the lower end of the top H of the next floor material 50a abutted on the upper surface of the lower jaw portion 10b of the first floor material 50a, the top H of the next floor material 50a is moved so as to slide on the upper surface of the lower jaw portion 10b of the first floor material 50a, and the next floor material 50a is tilted so that the first and the next floor materials 50a are in the same plane, whereby the convex portion R of the male fruit Jb of the next floor material 50a is fitted into the concave portion C of the female fruit Ja of the first floor material 50a.

[0043] Thereafter, by repeating the above-described steps, the floor material construction structure S can be formed, and the floor material 50a of the present embodiment can be constructed.

[0044] As described above, according to the floor material 50a of the present embodiment, the rectangular plate-shaped base material 10 having a thickness of 4 mm to 6 mm in plan view contains 20% to 30% by mass of vinyl chloride resin containing no plasticizer and 70% to 80% by mass of calcium carbonate. Therefore, a hard so-called SPC base material with excellent dimensional stability can be formed. In the base material 10, a female joint Ja having a recess C is provided at a side end along one of a pair of long sides (short sides) facing each other in plan view, and a male joint Jb having a protrusion R that fits into the recess C is provided at a side end along the other of the pair of long sides (short sides) facing each other in plan view. Here, the female joint Ja has a recess C into which the protrusion R of the male joint Jb fits, an upper jaw portion 10a provided on one surface side of the base material 10 of the recess C, and a lower jaw portion 10b provided on the other surface side of the base material 10 of the recess C and protruding toward the opening side of the recess C more than the upper jaw portion 10a. The length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is larger than the thickness Ta from one surface of the base material 10 to the other surface side of the top H of the base material 10. Therefore, when a plurality of floor materials 50a are sequentially pasted on the floor base F via the adhesive 5, for example, when the floor material 50a (female joint Ja) already pasted is approached from an obliquely upper direction by the floor material 50a (male joint Jb) to be pasted next in order, the lower end of the top H of the protrusion R in the male joint Jb of the floor material 50a to be pasted next can be surely brought into contact with the upper surface of the lower jaw portion 10b (on one surface side of the base material 10) in the female joint Ja of the floor material 50a already pasted. Further, in the recess C of the female joint Ja, the side surfaces on both sides sandwiching the bottom G are inclined so that the width along the thickness direction of the base material 10 gradually widens toward the opening side, and in the protrusion R of the male joint Jb, the side surfaces on both sides sandwiching the top H are inclined so that the width along the thickness direction of the base material 10 gradually narrows toward the tip side. Therefore, while moving the lower end of the top H of the protrusion R in the male joint Jb so as to slide on the lower side surface (upper surface of the lower jaw portion 10b) of the recess C in the female joint Ja, and by laying down (lying down) the floor material 50a to be pasted next in order so that the floor materials 50a are in the same plane, the protrusion R of the male joint Jb can be easily fitted into the recess C of the female joint Ja.As a result, it is possible to reliably bring into contact a predetermined position (the lower end of the top H of the convex portion R) of the male fruit Jb of the floor material 50a to be successively attached to a predetermined position (the upper surface of the lower jaw portion 10a) of the female fruit Ja of the floor material 50a already attached, and it is possible to easily fit the convex portion R of the male fruit into the concave portion C of the female fruit. Therefore, it is easier to fit the female fruit Ja and the male fruit Jb together, and the workability can be improved. Further, in the concave portion C of the female fruit Ja, the side surfaces on both sides sandwiching the bottom portion G are inclined so that the width along the thickness direction of the base material 10 gradually increases toward the opening side, and in the convex portion R of the male fruit Jb, the side surfaces on both sides sandwiching the top portion H are inclined so that the width along the thickness direction of the base material 10 gradually decreases toward the tip side. Thus, the strength of the upper jaw portion 10a and the lower jaw portion 10b of the female fruit Ja and the base portion of the convex portion R of the male fruit Jb is ensured, and their breakage can be suppressed.

[0045] Moreover, according to the floor material 50a of the present embodiment, since the length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is larger than the thickness Tb of the base material 10, the lower end of the top H of the convex portion R of the male fruit Jb of the floor material 50a to be successively attached to the upper surface (on one surface side of the base material 10) of the lower jaw portion 10b in the female fruit Ja of the floor material 50a already attached can be made to contact more reliably (on the other surface side of the base material 10).

[0046] Moreover, according to the floor material 50a of the present embodiment, a protective layer 30 containing spherical glass beads B is provided on one surface of the base material 10, and since the average particle diameter of the beads B is 1.0 times to 1.5 times the thickness of the protective layer 30, the surface of the protective layer 30 becomes uneven due to the spherical beads B, so that shaving of the shoe sole when stepping on the floor material 50a with bare feet can be suppressed, anti-slip performance can be imparted, and scratch resistance performance of the coating film surface can be imparted. Further, since the beads B are spherical with a predetermined size (the average particle diameter is 1.0 times to 1.5 times the thickness of the protective layer), it is difficult for dirt to adhere to the surface of the protective layer 30, and even if dirt adheres to the surface, the dirt can be easily wiped off.

[0047] Further, according to the floor material 50a of the present embodiment, since the projecting plate 15 and the waterproof sheet 20a are sequentially provided from the base material 10 side between the protective layer 30 and the base material 10, the projecting plate 15 can impart design properties to the surface of the floor material 50a, and the waterproof sheet 20a can suppress discoloration of the projecting plate 15 due to water absorption.

[0048] Further, according to the floor material construction structure S provided with the floor material 50a of the present embodiment, since the modified silicone-based adhesive 5 is provided between the floor base F and the plurality of floor materials 50a installed so as to be fitted to each other, unevenness adjustment of the plurality of floor materials 50a can be performed by the high-viscosity modified silicone-based adhesive 5. Further, in each floor material 50a, since the length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is larger than the thickness Ta from one surface of the base material 10 to the other surface side of the top H of the base material 10 and the thickness Tb of the base material 10, it is possible to suppress the protrusion of the modified silicone-based adhesive 5 disposed on the back surface of the floor material 50a to the surface of the floor material 50a.

[0049] 《Second Embodiment》 FIG. 2 shows a second embodiment of the floor material and the floor material construction structure according to the present invention. Here, it is a cross-sectional view of the floor material 50b of the present embodiment. In the following embodiments, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

[0050] In the first embodiment, the floor material 50a in which the projecting plate 15 and the waterproof sheet 20a are provided between the base material 10 and the protective layer 30 is exemplified. In the present embodiment, the floor material 50b in which the decorative sheet 20b is provided between the base material 10 and the protective layer 30 is exemplified.

[0051] As shown in FIG. 2, the floor material 50b includes a base material 10, and a waterproof sheet 20b and a protective layer 30 sequentially provided on the base material 10.

[0052] The decorative sheet 20b is formed of a resin film such as an olefin resin having a thickness of about 150 μm, for example. Here, patterns such as wood grain or stone grain are printed on the decorative sheet 20b. Note that the decorative sheet 20b is adhered to one surface of the base material 10 using, for example, a polyurethane-based reactive hot melt adhesive or the like.

[0053] The floor material 50b described above is directly applied to a floor base F such as a concrete slab in the same manner as the floor material 50a of the first embodiment, thereby constituting a floor material application structure S. Here, the floor material application structure S includes the floor base F and a plurality of floor materials 50b installed so as to be fitted to each other by the female fruits Ja and the male fruits Jb, and an adhesive 5 such as a modified silicone-based adhesive is provided between the floor base F and the plurality of floor materials 50b.

[0054] The floor material 50b of the present embodiment can be manufactured by omitting the attachment of the veneer (15) and attaching a decorative sheet (20b) instead of the waterproof sheet (20a) in the attachment step in the manufacturing method of the floor material 50a of the first embodiment.

[0055] Also, the floor material 50b of the present embodiment can be applied in the same manner as the application method of the floor material 50b of the first embodiment.

[0056] As described above, according to the flooring material 50b of this embodiment, the base material 10, which is a rectangular plate-like substrate in plan view with a thickness of 4 mm to 6 mm, contains 20% to 30% by mass of vinyl chloride resin that does not contain plasticizers and 70% to 80% by mass of calcium carbonate, and can be a so-called SPC base material that is hard and has excellent dimensional stability. In the base material 10, a female nut Ja having a recess C is provided at a side end along one of a pair of opposing long sides (short sides) in plan view, and a male nut Jb having a protrusion R that fits into the recess C is provided at a side end along the other of a pair of opposing long sides (short sides) in plan view. Here, the female fruit Ja has a recess C into which the convex portion R of the male fruit Jb fits, an upper jaw portion 10a provided on one surface side of the substrate 10 of the recess C, and a lower jaw portion 10b provided on the other surface side of the substrate 10 of the recess C and protruding toward the opening side of the recess C further than the upper jaw portion 10a, and the length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is greater than the thickness Ta from one surface of the substrate 10 to the other surface side of the substrate 10 at the apex H. Therefore, when multiple flooring materials 50b are attached in sequence onto the floor base F via adhesive 5, for example, the next flooring material 50b (its male fruit Jb) to be attached in sequence can be brought diagonally closer from above to the already attached flooring material 50b (its female fruit Ja), so that the lower end (on the other surface side of the substrate 10) of the apex H of the convex portion R of the male fruit Jb of the flooring material 50b to be attached in sequence can be securely abutted against the upper surface (on one surface side of the substrate 10) of the lower jaw portion 10b of the female fruit Ja of the already attached flooring material 50b. Furthermore, the concave portion C of the female fruit Ja has both side surfaces sandwiching the bottom G inclined so that its width in the thickness direction of the substrate 10 gradually widens toward its opening side, and the convex portion R of the male fruit Jb has both side surfaces sandwiching the top H inclined so that its width in the thickness direction of the substrate 10 gradually narrows toward its tip side. Therefore, by sliding the lower end of the top H of the convex portion R of the male fruit Jb along the lower side surface (upper surface of the lower jaw portion 10b) of the concave portion C in the female fruit Ja and tilting (laying down) the floor material 50b to be attached next so that the floor materials 50b are on the same plane, the convex portion R of the male fruit Jb can be easily fitted into the concave portion C of the female fruit Ja.This enables the predetermined position (the lower end of the top H of the convex portion R) of the male fruit Jb of the floor material 50b to reliably contact the predetermined position (the upper surface of the lower jaw portion 10a) of the female fruit Ja of the already pasted floor material 50b, and the convex portion R of the male fruit can be easily fitted into the concave portion C of the female fruit. Therefore, it is easier to fit the female fruit Ja and the male fruit Jb together, and the workability can be improved. Further, in the concave portion C of the female fruit Ja, the side surfaces on both sides sandwiching the bottom G are inclined such that the width along the thickness direction of the base material 10 gradually widens toward the opening side, and in the convex portion R of the male fruit Jb, the side surfaces on both sides sandwiching the top H are inclined such that the width along the thickness direction of the base material 10 gradually narrows toward the tip side. Thus, the strength of the upper jaw portion 10a and the lower jaw portion 10b of the female fruit Ja and the base portion of the convex portion R of the male fruit Jb is ensured, and their breakage can be suppressed.

[0057] Moreover, according to the floor material 50b of the present embodiment, since the length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is larger than the thickness Tb of the base material 10, the lower end of the top H of the convex portion R of the male fruit Jb of the floor material 50b to be successively pasted on the upper surface (on one surface side of the base material 10) of the lower jaw portion 10b of the female fruit Ja of the already pasted floor material 50b can be made to contact more reliably.

[0058] Furthermore, according to the floor material 50b of the present embodiment, a protective layer 30 containing spherical glass beads B is provided on one surface of the base material 10, and since the average particle diameter of the beads B is 1.0 to 1.5 times the thickness of the protective layer 30, the surface of the protective layer 30 becomes uneven due to the spherical beads B. This can suppress the wear of the shoe sole when stepping on the floor material 50b with bare feet, impart anti-slip performance, and also impart scratch resistance to the coating film surface. Also, since the beads B are spherical with a predetermined size (the average particle diameter is 1.0 to 1.5 times the thickness of the protective layer), dirt hardly adheres to the surface of the protective layer 30, and even if dirt adheres to the surface, it can be easily wiped off.

[0059] Further, according to the floor material 50b of the present embodiment, since the decorative sheet 20b is provided between the protective layer 30 and the base material 10, the decorative sheet 20b can impart design properties to the surface of the floor material 50b.

[0060] Further, according to the floor material construction structure S including the floor material 50b of the present embodiment, since the modified silicone-based adhesive 5 is provided between the floor base F and the plurality of floor materials 50b installed so as to fit together, unevenness adjustment of the plurality of floor materials 50b can be performed by the high-viscosity modified silicone-based adhesive 5. Further, in each floor material 50b, since the length L of the lower jaw portion 10b protruding from the upper jaw portion 10a is larger than the thickness Ta from one surface of the base material 10 to the other surface side of the top H of the base material 10 and the thickness Tb of the base material 10, it is possible to suppress the protrusion of the modified silicone-based adhesive 5 disposed on the back surface of the floor material 50b to the surface of the floor material 50b.

[0061] 《Other Embodiments》 In each of the above embodiments, a floor material in which actual processing is performed on the four peripheral end faces along the short side and the long side of a rectangular base material in plan view is exemplified. However, the present invention can also be applied to, for example, a floor material in which actual processing is performed on the end faces of two sides along the long side or the short side of a rectangular base material in plan view.

[0062] Further, in each of the above embodiments, a floor material in which actual processing is performed on the end face of a rectangular base material in plan view is exemplified. However, the present invention can also be applied to, for example, a floor material in which actual processing is performed on the end face of a square base material in plan view.

[0063] Further, in each of the above embodiments, a floor material including a rectangular base material in plan view is exemplified. However, the present invention can also be applied to, for example, a floor material including a base material having a shape in which a pair of opposing sides in plan view have both ends of the pair of sides connected by curves.

Industrial Applicability

[0064] As described above, the present invention is extremely useful because it can facilitate the fitting of the female and male fruits and improve the workability.

Description of Symbols

[0065] B beads C recess F floor base G bottom H top Ja female fruit Jb male fruit R protrusion S floor material construction structure 5 adhesive 10 base material 10a upper jaw part 10b lower jaw part 15 protruding plate 20a waterproof sheet 20b decorative sheet 30 protective layer 50a, 50b floor materials

Claims

1. A floor underlayment, A flooring construction structure comprising a plurality of floorings installed on the floor base so as to fit together, The above flooring materials are The plasticizer-free plasticizer-free plasticizer contains 20% by mass to 30% by mass of vinyl chloride resin and 70% by mass to 80% by mass of calcium carbonate. The plasticizer-free plasticizer-free plasticizer contains a substrate having a rectangular plate shape in a plan view and a thickness of 4 mm to 6 mm. A female fruit having a recess is provided at a side end along one of a pair of sides facing each other in a plan view of the base material, and a male fruit having a protrusion that fits into the recess is provided at a side end along the other side of the pair of sides, The female fruit has the recess, an upper jaw portion provided on one surface side of the substrate of the recess, and a lower jaw portion provided on the other surface side of the substrate of the recess and protruding toward an opening side of the recess more than the upper jaw portion, The recess has inclined side surfaces on both sides of a bottom portion so that the width of the recess in the thickness direction of the base material gradually increases toward the opening side, The convex portion has inclined side surfaces on both sides of the apex so that the width along the thickness direction of the base material gradually narrows toward the tip side, a length of the lower jaw portion protruding from the upper jaw portion is greater than a thickness from one surface of the base material to the other surface side of the base material at the top portion, A gap is provided between the top of the male fruit of one of the adjacent pairs of flooring materials and the floor base side of the other flooring material, and between the bottom of the female fruit of the other flooring material and the floor base side of the other flooring material. A flooring construction structure characterized in that a modified silicone adhesive is provided between the floor base and the plurality of flooring materials.

2. In the flooring construction structure according to claim 1, A flooring construction structure characterized in that the length of the lower jaw portion protruding from the upper jaw portion is greater than the thickness of the base material.

3. In the flooring construction structure according to claim 1 or 2, A protective layer including spherical glass beads is provided on one surface of the substrate; A flooring construction, characterized in that the average particle size of the beads is 1.0 to 1.5 times the thickness of the protective layer.

4. In the flooring construction structure according to claim 3, A flooring construction structure characterized in that a veneer and a waterproof sheet are provided in this order from the substrate side between the protective layer and the substrate.

5. In the flooring construction structure according to claim 3, A flooring construction, characterized in that a decorative sheet is provided between the protective layer and the base material.

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