JPH08260678A - Floor panel and dry floor-placing construction using the panel - Google Patents

Abstract

PURPOSE: To improve construction efficiency and simplify construction work by preventing a gap from being formed between floor panels so that a double floor of uniform level can be constructed. CONSTITUTION: A unit supporting leg 20, in which a receiving board 31 having thereon a pressure sensitive adhesive double coated sheet 35 is vertically adjustably mounted to the upper ends of bar-shaped legs 21, 23, is used, and a floor panel 10, in which a tongue member 13 is secured to a groove 12 of a pair of perpendicularly intersecting end surfaces of a rectangular particle board having the groove 12 longitudinally along each end surface of four sides, is used. A predetermined points on the edges of the panel 10 are supported by the legs 20 disposed on the floor surface of a foundation floor 1 at predetermined pitches, and the floor panels 10 are successively arranged in such a manner that a tongue member 13 or a groove 12 of one of the adjoining panels 10 is engaged with a groove 12 or a tongue member 13 of the other panel 10 so as to be fixed by the sheet 35 on the upper surface of the receiving board. The panels 10 are installed so as to be supported by the legs 20 at a predetermined level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry floor construction method for constructing a double floor by forming a space between it and an existing foundation floor in various buildings such as apartment houses, and a floor panel used therefor.

[0002]

2. Description of the Related Art A double floor is a plurality of floor panels (floor board materials).
Is constructed so that it is supported at a certain height by a plurality of support legs arranged on the foundation floor.The space between the existing floor surface and the double floor is used for various pipes such as water supply and drainage pipes and gas pipes. As a space for passing through, a space for passing wiring for electricity and communication, a space for installing an air conditioning duct and a heating and cooling duct under the floor, a space for laying a heat insulating material and a soundproofing material under the floor, etc. It is used as an air-conditioning duct for enhancing the soundproofing effect or the heat retaining effect. For such double-floor construction, there is a demand for a low-cost dry double-floor construction method that reflects the current labor shortage and the rise in prices and is as time-consuming as possible.

As a typical example of a conventional dry floor construction method, Japanese Patent Laid-Open No. 3-17348 discloses a unit comprising a rod-shaped leg portion and a receiving plate mounted on the upper end portion of the rod-shaped leg portion so as to be vertically adjustable. A method for constructing a dry double floor using a combination of a support leg group and a fixed-length rectangular floor panel group is disclosed. In this method, the unit support legs are arranged at a predetermined pitch on the floor surface of the foundation floor, and the floor base panel arranged with a predetermined gap is used to support the unit at the edge or a predetermined position on the longitudinal centerline. It is supported by legs. After laying the floor base panel in this way,
A floor plywood is laid to cover all floor base panels to form a floor base, and a floor finish material such as a CF sheet or a carpet is laid on the floor base.

[0004]

[Patent Document 1] Japanese Patent Application Laid-Open No. 3-173
According to the method described in Japanese Patent Publication No. 48, the floor base panel can be laid relatively easily and efficiently. However, in this construction method, since the edge portions are supported by the unit support legs with a space between each adjacent floor base panel, generally, a throwing plywood is attached to the upper surface of the laid floor base panel. , And lay a floor finish on it. If a floor finishing material, especially a soft finishing material such as a CF sheet or a carpet, is laid directly on the laid floor underlaying panel without laying a throwing plywood between the floor underlaying panels when a person walks. Each time you step on the gap part of the foot, you feel the gap part on the bottom of the foot, and generally, because one of the floor base panels is weighted, there is a step between the floor base panels and the stability is poor. In addition, there is a problem in that the user feels a sense of incongruity or squeaks by feeling the step on the bottom of the foot.

Due to these problems, particularly when laying a thin finishing material, after laying the floor base panel, it was necessary to throw a throwing plywood so as to cover the entire surface. As a result, an increase in cost due to the material cost of the discarded plywood, an increase in labor cost due to the time and effort required to put the discarded plywood, and a prolonged construction period cannot be avoided. On the other hand, when applying a wooden floor finishing material (flooring), it is possible to omit the throwing plywood because it has relatively high strength, but after applying the floor base panel once, wood flooring is also performed at the same place. Since it is necessary to construct the floor covering material, there is a problem that it is troublesome twice, the construction cost and the material cost are increased, and the construction time is lengthened.

Therefore, the object of the present invention is that there is no gap between the floor panels and that the floor panel is stable despite the use of waste plywood. It is an object of the present invention to provide a floor panel capable of constructing a double floor on a uniform floor level that does not cause a feeling of discomfort even when stepped on and a dry floor construction method using the floor panel. Further, an object of the present invention is to provide a double floor which has sufficient strength without using a throwing plywood even when a thin soft finishing material such as a CF sheet or a carpet is used, which makes the construction efficient and simple. It is to provide a construction method and a floor panel used therefor. Further, an object of the present invention is to provide a floor panel in which a floor base panel and a floor finishing material are integrated, whereby a double floor excellent in strength and stability can be constructed, and the construction cost and the construction period can be shortened. It is to provide a dry floor construction method capable of achieving the above.

[0007]

In order to achieve the above object, according to the present invention, a pair of orthogonal end faces of a rectangular particle board having grooves formed along the longitudinal direction on each end face of four sides is formed. There is provided a floor panel comprising a tongue member fixed to the groove. The term “rectangle” as used herein means a concept (rectangle) including a rectangle and a square. In the floor panel of a preferred embodiment, a tongue member made of hard plastic and having a substantially elliptical cross section is fixed to the groove portions of the pair of end faces of the particle board which are orthogonal to each other. A floor panel in which a floor base panel and a floor finishing material are integrated is also provided. Preferable examples thereof include a veneer on the surface of the particle board, a veneer with a decorative groove, a synthetic resin sheet, and a carpet, especially a tile. A floor panel to which a finishing material such as carpet is attached. Also,
It can also be a floor panel with a finish coating on the surface.

Further, according to the present invention, there is also provided a dry floor construction method using the floor panel as described above. The basic mode is a dry floor construction method in which a group of unit support legs and a group of floor panels are combined, and the unit support legs are mounted on a rod-shaped leg and the upper end of the rod-shaped leg so as to be vertically adjustable. A rectangular particle board having a groove formed along each longitudinal direction on each end face of four sides as the floor panel, using a unit supporting leg having an adhesive layer on the upper surface of the receiving plate. , Using a floor panel in which tongue members are fixed to the groove portions of a pair of orthogonal end surfaces, the unit support legs are arranged on the floor surface of the foundation floor at a predetermined pitch, and the floor panel is The groove portion or tongue member of one floor panel adjacent to the groove member or groove portion of the other floor panel adjacent to each other so that a predetermined portion is supported by the unit support leg and is fixed by the adhesive layer on the upper surface of the receiving plate. Sequentially arranged while engaged, it is characterized in that laying the floor panels in a state of being supported at a predetermined height level by the unit supporting leg.

According to a first specific aspect of the method of the present invention, there is provided a dry floor construction method in which a group of unit support legs and a group of floor panels are combined, wherein the unit support legs are:
A receiving plate having a level adjusting nut fitted in an insertion hole at a substantially central portion and having an adhesive layer on the upper surface, a floor contact base and a support rotatably erected on the floor contact base. While using a unit support leg composed of a rod-shaped leg portion composed of a bolt, as the floor panel, a pair of orthogonal end surfaces of a rectangular particle board having grooves formed along the longitudinal direction on each end surface of the four sides. Using a floor panel in which a tongue member is fixed to the groove portion, the unit support legs are arranged at a predetermined pitch on the floor surface of the foundation floor, and the floor panel is supported at a predetermined edge portion of the unit support unit. Place the upper end of the level adjusting nut on the upper surface of the receiving plate of the leg so that the upper end portion is at least partially exposed, and fix by the adhesive layer on the upper surface of the receiving plate.
After rotating the support bolt to adjust it to a predetermined height level, an adhesive is injected from the upper end of the level adjusting nut to fix the level adjusting nut and the upper end of the supporting bolt screwed to the level adjusting nut, Then, the groove member or groove member of the end face of the floor panel fixed to the receiving plate upper surface of the unit supporting leg is fitted with the tongue member or groove member of the other floor panel and adhered to the receiving plate upper surface of the unit supporting leg. There is provided a dry floor construction method characterized in that a step of fixing by layers is sequentially repeated and a floor panel is laid in a state of being supported at a predetermined height level by unit support legs.

According to a second specific aspect of the method of the present invention, a unit support leg and floor panel similar to those used in the first specific aspect are used, but supported by the unit support leg. As described above, a thin level adjusting base material is laid in advance and the height level thereof is adjusted, and then a floor panel is laid. That is, the unit support legs are arranged on the floor surface of the foundation floor at a predetermined pitch, and a predetermined level so that the thin level adjusting base material is supported by the unit support legs and the upper end surface of the support bolt is exposed. Placed through the gap between the above, fixed by the adhesive layer on the upper surface of the receiving plate, rotate the support bolt to adjust the level adjusting base material to a predetermined height level, and then from the upper end of the level adjusting nut. An adhesive is injected to fix the level adjusting nut and the upper end of the support bolt screwed to the level adjusting nut, and then the floor panel is placed on the level adjusting base material laid in this way, and one of the adjacent floors. There is provided a dry floor construction method characterized by sequentially laying while fitting a tongue member or a groove portion of another floor panel to a groove portion or a tongue member of a panel. In the first and second specific aspects, it is possible to use a floor panel having a floor base panel and a finishing material, for example, a veneer on the surface of the particle board, a veneer having a decorative groove process, a composite. A floor panel to which a finishing material such as a resin sheet or carpet is attached can be used. It is also possible to use a floor panel whose surface is finish-painted.

Further, according to a third specific aspect of the present invention, there is provided a construction method capable of adjusting a height level after laying a floor panel as a whole. That is, a receiving plate having a level adjusting nut fitted in an insertion hole at a substantially central portion and having an adhesive layer on an upper surface, a floor base and a floor base rotatably erected on the floor base. , And a rectangular particle board in which a groove is formed along each of the end faces of the four sides along the longitudinal direction while using a unit support leg composed of a rod-shaped leg made up of a support bolt having a groove on the upper end face A tongue member is fixed to the groove portion of the pair of end faces, and a hole or notch having a size substantially equal to or larger than the diameter of the support bolt is provided at an edge portion with a space corresponding to the arrangement pitch of the unit support legs. By using a floor panel provided with parts, the unit support legs are arranged on the floor surface of the foundation floor at a predetermined pitch, and the floor panel is aligned so that the holes or notches align with the support bolts of the unit support legs. The edge of the The floor member or groove member of the adjacent floor panel is fitted to the groove member or the groove member of the adjacent floor panel so that the groove member or the groove member of one of the adjacent floor panels is supported by the floor supporting leg and is fixed by the adhesive layer on the upper surface of the receiving plate. While arranging in sequence, adjust the height level by rotating the support bolt, and then inject the adhesive from the upper end of the level adjusting nut to attach the level adjusting nut and the upper end of the supporting bolt screwed to it. There is provided a dry floor construction method, which comprises fixing, and then embedding an embedding member having substantially the same size as the hole or notch in the floor panel and covering the finishing material.

[0012]

The basic construction of the dry floor construction method of the present invention is, as described above, a pair of orthogonal end faces of a rectangular particle board having grooves formed along the longitudinal direction on the end faces of the four sides. A floor panel having a tongue member fixed to the groove is used, and predetermined edge portions thereof are supported by unit support legs arranged on the floor surface of the foundation floor at a predetermined pitch, and the adhesive layer on the upper surface of the receiving plate. So that they can be fixed by fitting the groove member or groove member of one adjacent floor panel to the groove member or groove member of the other floor panel one after another, and supporting them at a predetermined height level by the unit support legs. The floor panel is laid in the laid state, so that no gap is created between the laid adjacent floor panels, and the surface can be a continuous and uniform level surface.

It is possible to form a continuous surface without forming a gap between the adjacent floor panels by forming the tongue portion and the groove portion in the floor panel itself. However, since the particle board itself has sufficient thickness to withstand the load, when the tongue part is formed on the end surface of the particle board, the tongue part itself has weak strength, especially against shear stress. Will be weakened. In addition, each time a person walks, the weight of one of the floor panels is generally applied. At that time, stress (shear stress) concentrates on the tongue of the floor panel, so the tongue is easily subjected to repeated loading. It breaks, and after that, there is a step between the floor panels each time you walk, resulting in poor stability and a feeling of discomfort by feeling the step on the back of your foot, and a problem of squeaking noise. To do.

On the other hand, like the floor panel used in the present invention, the floor panel itself and the tongue member are formed separately, and for example, a hard plastic tongue member is fitted into the groove formed on the end face of the floor panel and bonded. By fixing with an agent,
The tongue itself can have a stable structure with extremely high strength, and has a structure with extremely excellent resistance to shear stress in particular, and has sufficient resistance even when subjected to repeated loads by walking and has an extremely long length. Can maintain a continuous and uniform floor level over a period of time. As a result, the problems described above do not occur. In addition, it is not necessary to put a throwing plywood like the conventional construction method, and further, a veneer on the surface of the particle board, a veneer with a decorative groove processing, a synthetic resin sheet, or a finishing material such as a carpet is attached, By applying a finish coating on the surface, it can be a floor panel that has both the function as a floor base panel and the function as a floor finishing material, and it is possible to omit construction of discarded plywood and wood finishing material as in the past, Therefore, the material cost can be saved, and the construction can be made efficient and simplified. As a result, the construction cost can be reduced and the construction period can be shortened.

According to the first specific embodiment of the dry floor construction method of the present invention, the groove portion or the tongue member of the end face of the floor panel fixed to the upper surface of the receiving plate of the unit supporting leg is provided with another floor panel. The floor panel is laid in a state of being supported at a predetermined height level by the unit support legs by sequentially repeating the steps of fitting the base member or the groove portion and fixing the same to the upper surface of the receiving plate of the unit support legs with the adhesive layer. . Therefore, the waste plywood is not required at all, and by using the floor panel that has both the function as the floor base panel and the function as the floor finishing material as described above, the construction of the floor finishing material becomes unnecessary, and the floor finishing material is unnecessary. Construction can be performed once.

On the other hand, according to the second specific aspect,
Before the floor panel is laid by being supported by the unit support legs arranged at a predetermined pitch on the floor surface of the foundation floor, a thin level adjusting base material is previously supported by the unit support legs, and the support bolts are provided. The floor panels are arranged with a predetermined gap so that the upper end surface is exposed, and the floor panel is laid on the level adjusting base material thus arranged. Therefore, although the extra step of constructing the base material for level adjustment is required, it is possible to smoothly perform the work of adjusting the height level and injecting the adhesive into the level adjusting nut of the unit support leg, thus improving workability. The advantage is that you can.

According to a third specific aspect of the present invention, a tongue member is provided in the groove portions of a pair of orthogonal end faces of a rectangular particle board in which groove portions are formed along the longitudinal direction on the end faces of four sides. Is fixed, and the floor panel is provided with a hole or a notch portion having a dimension substantially equal to or larger than the diameter of the support bolt at the edge with a space corresponding to the arrangement pitch of the unit support legs, and the above-mentioned hole. Alternatively, a predetermined edge portion is supported by the unit support leg so that the cutout portion is aligned with the support bolt of the unit support leg arranged on the floor surface of the foundation floor. Therefore, according to this aspect, after laying the floor panel as a whole, the rotary tool tip is inserted into the groove portion of the upper end surface of the support bolt through the hole portion or the hole portion formed by the notched portions facing each other of the adjacent floor panel. By fitting and rotating the support bolt, the height level of the floor panel can be adjusted to a constant level, and the height level can be easily adjusted, thereby improving workability. After the floor panel is constructed, an embedding member having substantially the same size as that of the floor panel is embedded in the hole or the cutout portion of the floor panel and the finishing material is covered.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more specifically below with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows an example of a dry floor construction method of the present invention. In the figure, reference numeral 1 is a foundation floor such as concrete slab, 2 is a wall or partition, 10 is a floor panel, 20 is a unit support leg, and 40 is a joist unit. Is shown.

As shown in FIGS. 2 and 3, the floor panel 10 has a rectangular particle board 11 in which grooves 12 are formed along the longitudinal direction on the end faces of the four sides, and the groove parts 12 are formed on a pair of orthogonal end faces. The tongue member 13 having a substantially elliptical cross section is fixedly attached by an adhesive or the like. The floor panel 10 is manufactured in such a manner that each end face of the rectangular particle board 11 as shown in FIG. 4 (A) is grooved by a router or the like, and the tongue member is formed as shown in FIG. 4 (B). A groove 12 having a cross-sectional shape corresponding to the cross-sectional shape is formed, an adhesive is applied to the groove 12 or the tongue member 13, and then the groove 12 is formed on the groove 12 as shown in FIGS. The tongue member 13 is fitted and fixed and the floor panel 10 is formed in this manner. The tongue member 13 may be made of hard plastic, wood, or the like that does not easily cause flooring noise, and hard plastic is particularly preferable because it exhibits excellent resistance to shear stress. The cross-sectional shape of the tongue member 13 (therefore, the cross-sectional shape of the groove portion 12) is arbitrary as long as it has a rounded cross-sectional shape so that the tongue member can be easily fitted into the groove portion. For example, a circular shape or a rounded shape. It can be formed into a rectangular shape or a polygonal shape, but an oval shape is particularly preferable.

FIGS. 5 to 8 show some modifications of the floor panel having both the function as the floor base panel and the function as the floor finishing material. Floor panel 10a shown in FIG.
Has the same basic structure as that of the floor panel shown in FIGS. 2 and 3, but has a veneer on the surface of the particle board 11,
A synthetic resin sheet such as a polyvinyl chloride sheet and a finishing material 14 such as a carpet or a tile carpet are attached by an adhesive or the like. Floor panel 1 shown in FIG.
0b has the same structure as that of the floor panel shown in FIG. 5, but the end surface of the finishing material 14 such as a projecting plate is tapered to form a tapered surface 15. 7 and 8 show a floor panel 10c in which a veneer 16 having a decorative groove 17 is attached to the surface of a particle board 11, and in this floor panel 10c as well, the edge of the veneer 16 is tapered. To form a tapered surface 15. In this way, by applying the decorative groove processing to the surface of the projecting plate 16 and tapering the edge thereof, when the floor panel is laid, the tapered surfaces are in contact with each other and it looks like a decorative groove. The advantage is that the seams between the panels are not bothered.

In the case of a floor panel to which a wood-based finishing material such as a veneer or a veneer having a decorative groove is attached, the appearance can be improved by applying a finish coating to the surface thereof. Further, in the case of the floor panel 10 to which the finishing material as shown in FIG. 2 is not attached, the surface of the floor panel 10 is subjected to finish painting so that the floor panel has both a function as a floor base panel and a function as a floor finishing material. Can also be used as is.

FIG. 9 shows an example of the unit support leg used in the present invention. As shown in FIG. 9, the unit support leg 20 includes a vibration-proof floor-contact base 21 made of an elastic material such as rubber.
And a level-adjusting nut 29 having a rod-shaped leg portion composed of a support bolt 23 rotatably erected on the base 21, a ring-shaped support portion 30 projecting from a substantially central portion of the outer periphery, and a central portion. And a receiving plate 31 having an insertion hole 32 into which the upper portion of the level adjusting nut 29 is fitted. The receiving plate 31 is formed in a square shape or a rectangular shape, but its shape may be arbitrary. The floor-contacting base 21 is made of a relatively hard elastic material such as rubber or synthetic resin, and is adapted to just fit to a foundation floor surface such as a concrete slab and to perform a vibration-proof function. A non-through central hole 22 for inserting the base round bar portion 25 of the support bolt 23 is formed in the central portion of the upper surface thereof.

On the other hand, the support bolt 23 is integrally provided with an annular flange portion 24 projecting laterally on the outer peripheral surface at a position spaced upward from the lower end by a predetermined distance, and a screw portion 27 is formed above the flange portion. The base end portion 25 below the flange portion 24 is formed as a round bar portion having a circular cross section, and a bulge portion 26 is formed at the lower end of the base end round rod portion 25. Further, on the top end surface of the support bolt 23, a groove portion 28 (in the illustrated example, a minus groove, but may be a plus groove or a square concave portion) is formed to fit the tip of the rotating tool. Then, the base round bar portion 2 of the support bolt 23
By inserting 5 into the central hole 22 of the floor-contacting base 21, the support bolt 23 is rotatably erected on the floor-contacting base 21 with the flange 24 as the support portion. Also,
The bulging portion 26 formed at the lower end of the base round bar portion 25 of the support bolt 23 allows the base round bar portion 25 of the support bolt 23 to temporarily move.
After it is inserted into the center hole 22 of the floor-contacting base 21, it will not come out easily. The length of the base round bar portion 25 is shallower than the depth of the central hole 22 of the floor-contacting base 21, and the length is such that the air chamber 36 is formed thereunder. By thus providing the air chamber 36 below the base round bar portion 25, the air chamber 36 functions as an air cushion, and the vibration damping effect is further improved. Further, a lubricant such as grease is applied to the inner surface of the central hole 22 of the floor-contacting base 21 so that the support bolt 23 can be smoothly rotated and the air chamber 36 is hermetically sealed. Is preferred.

The upper part of the insertion hole 32 of the receiving plate 31 is chamfered and expanded. The level adjusting nut 29 is fitted into the insertion hole 32 of the receiving plate 31, and then the upper portion of the nut 29 is expanded and partially embedded in the chamfered portion 33 of the receiving plate inserting hole 32, so that the level adjusting nut 29 is inserted into the receiving plate 31. Can be firmly attached. At the same time, an adhesive reservoir 34 is formed on the level adjusting nut 29. In this way, the receiving plate 31
The unit support leg 20 is assembled as shown in FIG. 9 by screwing the upper end portion of the screw portion 27 of the support bolt 23 into the level adjusting nut 29 fitted in the insertion hole 32 of the. Further, as shown in FIG. 9, a double-sided adhesive sheet 35 is attached to the upper surface of the receiving plate 31 of the unit supporting leg 20, and the release sheet covering the double-sided adhesive sheet 35 at the time of use (see FIG. It is used by peeling off (not shown). Alternatively, the pressure-sensitive adhesive layer may be directly applied on the upper surface of the receiving plate 31, and a release paper may be attached onto the pressure-sensitive adhesive layer for convenience of storage and transportation. In the unit support leg 20 assembled as described above, the tip of a rotating tool such as a screwdriver is fitted into the minus groove 28 formed in the upper end surface of the support bolt 23 to rotate the level adjusting nut 2.
9 and the receiving plate 31 to which it is fixed can move up and down, and the floor level of the floor panel supported by the receiving plate 31 can be adjusted.

In order to smoothly supply the adhesive to the threaded portion 27 of the support bolt 23 and the threaded portion of the level adjusting nut 29, one screw is provided in the axial direction in the inner peripheral threaded portion of the level adjusting nut 29. Alternatively, it is desirable to form a plurality of grooves, and each groove can be stopped up to the vicinity of the lower end of the level adjusting nut 29 to form a non-penetrating groove to prevent the adhesive from dripping. Alternatively, the screw portion 2 of the support bolt 23
7 It is also possible to form a groove in the axial direction at the upper end. FIG.
0 indicates a preferable example of the level adjusting nut 29,
The level adjusting nut 29 is formed with two grooves 37 in the axial direction on its inner peripheral thread portion so as to penetrate each thread from the upper end to the lower end. Such a level adjusting nut 29
When the adhesive is injected into the adhesive reservoir 34 after the floor level is adjusted, the adhesive will be applied to the groove 37.
Since it is supplied to the threaded portion of the support bolt 23 and the level adjusting nut 29 and spreads therethrough, the support bolt 23 and the level adjusting nut 29 can be efficiently fixed to each other by a single adhesive injection operation.

11 and 12 show the structure of the support bolts of the unit support legs and the floor-contacting base used in the present invention, and modifications of their mounting forms. In the case of the unit support leg 20a shown in FIG. 11, an annular groove 38 is formed on the outer peripheral surface of the base round bar 25a projecting downward from the flange 24a of the support bolt 23a, while the floor contact base 21a is formed. An annular protrusion 22 a that fits into the annular groove 38 is formed in the substantially central portion of the inner peripheral surface of the central hole 22. Therefore, once the base round bar portion 2 of the support bolt 23a is
After the 5a is fitted into the central hole 22 of the floor-contacting base 21a, the protrusion 22a fits into the annular groove 38, so that it does not come out easily. Note that the air chamber 36 functioning as an air cushion is formed in the lower portion of the base round bar portion 25a, as in the unit support leg shown in FIG.

On the other hand, the unit support leg 20b shown in FIG.
In this case, the flange portion and the base round bar portion are not formed on the support bolt 23b, and the disk-shaped base portion 39 is formed on the lower end of the support bolt 23b. On the other hand, the floor-contacting base 21b is formed with a central hole 22b having a size such that the disc-shaped base portion 39 can be fitted therein, and the disc-shaped base portion 39 at the lower end of the support bolt 23b is fitted into the central hole 22b. It is configured to stand. In any of the unit support legs 20a and 20b, the support bolts 23a and 23b
So that the rotation of the floor can be performed smoothly, the floor contact bases 21a, 21
It is preferable to apply a lubricant such as grease to the central holes 22 and 22b of b.

Next, construction of the dry floor construction method of the present invention will be described. First, a basic construction method will be described. As shown in FIG. 1, a joist unit 40 or an extra joist is installed so that the joist 41 is located along a predetermined height of the room wall or the partition 2, and One side of the floor panel 10 is placed on the top and fixed with nails, an adhesive or the like. Joist unit 40
The other edge of the floor panel 10 that is not in contact with the joist 41 is mounted on the unit support leg 20 arranged on the floor surface of the foundation floor (concrete slab) 1 at a predetermined pitch in a cantilevered manner. The unit support leg 20 and the floor panel 10 are attached via the adhesive sheet 35 or the like attached to the upper surface of the receiving plate 31 of the unit support leg 20, and the floor panel 10 is pressure-bonded to the adhesive sheet 35 when the floor panel is laid. Keep it fixed.
Then, if necessary, the support bolts 23 of the unit support legs 20 are turned to move the receiving plate 31 up and down to adjust the floor level, and then the edge of the floor panel 10 is nailed to receive the unit support legs 20. It is fixed to the plate 31. Since the pressure-sensitive adhesive sheet attached to the upper surface of the backing plate has a problem in durability, it is preferable to perform final fixing by nailing. afterwards,
Groove 12 or tongue member 1 of one adjacent floor panel 10
3, the tongue member 13 or the groove portion 12 of the other floor panel 10 is fitted and sequentially arranged, the floor panel 10 is fixed to the receiving plate 31 by nailing in the same manner as described above, and the predetermined height is provided by the unit supporting legs. Lay floor panels without any gaps while being supported by the level.

Repeat the above work for each floor panel,
In a small space such as a corner of a room where a standard floor panel cannot fit,
After installing the joist unit or extra joist, process the floor panel,
Match the dimensions and arrange the unit support legs as appropriate to spread the floor panel. Even at the construction site,
Grooving of the cut floor panel and mounting of the tongue member can be easily performed by the operation as described with reference to FIG. Further, in consideration of the expansion margin of the floor panel, the edge portion of the floor panel adjacent to the room wall or the partition 2 is arranged with a slight gap between it and the room wall or the partition.

FIG. 13 shows an example of a joist unit having vertically adjustable support legs used in the floor placing method of the present invention. FIG. 13 shows one structure of a joist unit. This joist unit 40 has through holes 42 in the longitudinal direction at least at two spaced apart laterally long joists 41 made of wood or other materials. A flanged nut 43 is fitted and fixed to the lower portion of the through hole 42, and an upper end portion of a support bolt (support leg) 44 is screwed into the nut 43. The lower end of the support bolt 44 is rotatably attached to a rubber pedestal 45 having sufficient strength as with the unit support leg, if necessary. Alternatively, it is also possible to use one without a rubber pedestal. On the upper end surface of the support bolt 44, a minus groove (not shown) is provided similarly to the support bolt of the unit support leg shown in FIG. Therefore, the through hole 42
The upper surface of the joist 41 can be adjusted to a desired height level by inserting the tip of the rotating tool from the upper part, fitting it into the minus groove, and rotating the support bolt 44.

The other joist unit is an L-shaped receiving member having a supporting leg receiving portion with a screw hole formed in the side wall portion, unlike the method of directly attaching the supporting leg to the joist material so as to be vertically adjustable as described above. And a supporting leg member having at least an upper end portion provided with a screw portion to be screwed into the screw hole is used. For example, as shown in FIG. An L-shaped receiving member 47a having a support leg receiving portion 49a in which 50a is formed,
A support leg member 51 including a support bolt 52 having an outer peripheral surface threaded and a height adjusting groove 53 provided on an upper end surface thereof, and a pedestal 54 rotatably attached to a lower end portion of the support bolt 52. In this method, a horizontally long joist 55 is supported by using a joist receiving metal fitting 46a. On the other hand, FIG. 15 shows another example of the L-shaped receiving member. In the L-shaped receiving member 47b of the joist receiving bracket 46b, a cylindrical support leg receiving portion 49b is formed on the protruding portion 56 protruding outward from between the side wall portions 48b by, for example, a squeeze molding method, and then the support leg is formed. A screw hole 50b is formed by threading the inner circumference of the receiving portion 49b. In any joist receiving bracket, the height of the L-shaped receiving member can be adjusted by rotating the support bolt.
Further, the L-shaped receiving member and the joist can be fixed by a suitable means such as a nail, a screw, or an adhesive.

The fixing of the joist unit to the wall or partition of the joist unit as described above can be performed by an appropriate means such as nails, screws or an adhesive. As a countermeasure against floor squeaking noise or floor impact noise, it is preferable to interpose a cushioning material such as foaming resin or flexible resin between the wall or partition 2 and the joist 41 of the joist unit 40. Fixing between the joist of the joist unit, the cushioning material, and the wall or partition can be performed by applying an adhesive to both sides of the cushioning material, or by using nails or screws, but the most convenient way is to use both sides as the cushioning material. It is preferable to use an adhesive sheet. Thus, by interposing the cushioning material between the joist and the wall or the partition, the squeaking noise of the floor can be further reduced. In addition, it is possible to block and buffer the floor cushioning sound and the propagation of vibration from the wall. In the floor placing method of the present invention, not only the joist unit as described above, but also the conventional joist construction, that is, the joist is fixed to the wall or the partition at a predetermined floor height position with a nail, etc. It is also possible to adopt a construction method in which bundles for supporting joists are inserted at an appropriate interval between the foundation floor (concrete slab) and the joists, and then the joists and the joists are fixed with nails or the like.

Next, a concrete construction example of the floor placing method of the present invention will be explained. In the construction example shown in FIG. 16, the floor panel 10c shown in FIGS. 7 and 8 and the unit support leg 20 shown in FIG. 9 are used. First, as already described in connection with FIG. 1, the floor panel 1 adjacent to the wall or partition.
One side of 0c is placed and fixed on the joist unit or the outer joist. Next, the other edge of the floor panel 10c is exposed on the upper surface of the receiving plate 31 of the unit supporting legs 20 arranged on the floor surface of the foundation floor 1 at a predetermined pitch so that the upper end portion of the level adjusting nut 29 is exposed. The floor panel 10c and its tongue member after nailing from above the tongue member 13 of the floor panel 10c so that the nail is not exposed. 13 and the receiving plate 31 of the unit supporting leg 20 are firmly fixed together by the nail 60. Then, if necessary, the tip of a rotating tool such as a screwdriver is inserted from above the insertion hole 32 of the receiving plate 31 and fitted into the groove 28 formed on the top end surface of the support bolt to rotate the support bolt 23. After adjusting the floor level to a predetermined height level, the level adjustment nut 2
Adhesive is injected from the upper end of 9 and level adjustment nut 2
9 and the upper end portion of the support bolt 23 screwed thereto, and then the support plate 3 of the unit support leg 20 is thus fixed.
1. Tongue member 1 on the end face of floor panel 10c fixed to the upper surface
3 is fitted with the groove portion 12 of the other floor panel 10c,
The edge portion is fixed to the upper surface of the receiving plate 31 of the unit supporting leg 20 with the adhesive sheet 35. After that, the other edge of this floor panel is placed on another unit supporting leg, and fixing by nailing, floor level adjustment and adhesive injection are performed in the same manner as described above. Such steps are sequentially repeated to lay the floor panel 10c in a state of being supported by the unit supporting legs 20 at a predetermined height level.

FIG. 17 shows that the seam portion of the laid floor panel 10c is located substantially on the center line of the receiving plate 31 of the unit supporting leg 20, that is, the edge portion of the floor panel 10c receives the unit supporting leg 20. The construction example in which the upper end of the level adjusting nut 29 is placed on the upper surface of the plate 31 so as to be partially exposed is shown. The construction method is basically the same as the construction example shown in FIG. . However, FIG.
In the construction example shown in 7, since the upper end of the level adjusting nut 29 is partially exposed, there is no hindrance to the injection of the adhesive, but the tip of the rotating tool such as a screwdriver is inserted from above, It is difficult to fit the groove 28 in the top end surface of the support bolt 20. Therefore, in this construction example, for example, the nut 61 is screwed into the support bolt 23, and is swaged at an appropriate position (the upper portion of the flange portion 24 in the illustrated example) and fixed by welding or the like. The nut 61 and the support bolt 23 to which the nut 61 is fixed by a wrench or the like.
It is necessary to rotate and adjust the floor level. Instead of the nut 61 as described above, the flange portion 24
It is also possible to form a square shape and rotate this portion with a spanner or the like, or to form the square portion integrally with the support bolt 23 in advance.

FIG. 18 uses the same unit supporting legs 20 as used in the construction example shown in FIG. 16 and the floor panel 10a shown in FIG. 5, but is thin in advance so as to be supported by the unit supporting legs 20. An example of construction is shown in which the floor panel 10a is laid after the level adjusting base material 62 is laid and the height level thereof is adjusted. That is, after arranging the unit support legs 20 on the floor surface of the foundation floor 1 at a predetermined pitch, the thin level adjusting base material 62 is supported by the unit support legs 20 so that the edges thereof are supported by the unit support legs 20. 23
Arrange it through a predetermined gap so that the upper end surface of is exposed,
It is fixed by the adhesive sheet 35 on the upper surface of the receiving plate 31. Then, the tip of a rotating tool such as a screwdriver is inserted from above the insertion hole 32 of the receiving plate 31 to insert the groove 2 on the top end surface of the support bolt.
8, the support bolt 23 is rotated to adjust the level adjusting base material 62 to a predetermined height level, and then an adhesive is injected from the upper end portion of the level adjusting nut 29 to obtain the level adjusting nut 29 and the level adjusting nut 29. Support bolt 2 screwed together
3 Fix the upper end. Then, the floor panel 10a is placed on the level adjusting base material 62 laid in this way, and the tongue member 13 or the groove 12 of the adjacent one floor panel 10a.
Then, the groove portion 12 or the tongue member 13 of the other floor panel 10a is laid while being fitted. When the floor panels 10a are sequentially laid, nailing is performed from above the tongue member 13 of the floor panel 10a to receive the floor panel 10a and the tongue member 13 and the receiving plate 31 of the unit supporting leg 20 or further for level adjustment. The base material 62 can also be firmly fixed together.

As the level adjusting base material 62, a size slightly smaller than the size of the floor panel to be laid (when laying, a predetermined gap equal to or slightly larger than the diameter of the support bolt 23 can be opened). (Size) panel material can be used, or an elongated plate material that can perform the same work as joist construction can be used.In this case, the unit support legs are used to support the level adjustment base material over the entire laying area. After the entire construction, the level can be adjusted as a whole, and the level adjustment accuracy and workability are improved.

In each of the construction examples described above, a flooring material was used in which a finishing material was adhered to the surface of the flooring panel and had a function as a floor base panel and a function as a floor finishing material. It shows a construction example in which the floor panel and the finishing material are separated and the floor level can be adjusted after the floor panel is laid entirely. That is, FIG. 19 and FIG.
In the construction example shown in 0, a rectangular particle board 11 having grooves 12 formed along the longitudinal direction on each end face of four sides
Of the tongue member 13 in the groove portion 12 of the pair of orthogonal end faces.
Is fixed to the floor panel 10d having a cutout portion 18 having a dimension substantially equal to or larger than the diameter of the support bolt at the edge with a space corresponding to the arrangement pitch of the unit support legs 20. To use. First, the unit support legs 20 are arranged on the floor surface of the foundation floor 1 at a predetermined pitch,
The floor panel 10d is temporarily fixed to the upper surface of the receiving plate 31 of the unit supporting leg 20 with an adhesive sheet 35 so that the cutout portion 18 is aligned with the support bolt 23 of the unit supporting leg 20. Then floor panel 10d
A nail is nailed from the upper part of the tongue member 13, and the floor panel 10d, the tongue member 13 and the receiving plate 31 of the unit supporting leg are fixed together by the nail 60. After that, the unit support leg 2
The groove portion of the other floor panel 10d is fitted into the tongue member 13 of the end surface of the floor panel 10d fixed to the upper surface of the receiving plate 31 of No. 0, and the edge portion is attached to the upper surface of the receiving plate 31 of the unit supporting leg 20 by an adhesive sheet. Fix with 35. After repeating such operations in sequence and laying the floor panel 10d as a whole,
Insert the tip of a rotating tool such as a screwdriver through the hole formed by the pair of notched portions 18, 18 facing each other in the floor panel 10d, fit it into the groove 28 on the top end surface of the support bolt, and rotate the support bolt 23 to raise the height. After adjusting the level, an adhesive is injected from the upper end of the level adjusting nut 29 to fix the level adjusting nut 29 and the upper end of the support bolt 23 screwed thereto. After that, an embedding member of substantially the same size is embedded in the hole formed by the pair of notched portions 18 of the floor panel 10d facing each other, and the finishing material is covered.

In the construction example shown in FIG. 19, the finishing material 14a
An embedding member 19a projecting at a predetermined pitch is integrally formed on the lower surface of the floor member, and at the same time when the finishing material 14a is laid, the embedding member 19a is inserted into the hole formed by the cutout portion 18 of the floor panel 10d. Embedding is also performed. On the contrary,
In the construction example shown in FIG. 20, the finishing material 14b and the embedding member 1
9b is a separate body, and after embedding the embedding member 19b in all the holes formed by the cutout portions 18 of the floor panel 10d, the finishing material 14b is laid. When the finishing material and the embedding member are integrally molded, the material thereof is preferably synthetic resin such as polyvinyl chloride. When using a finishing material that integrates such embedded members, it also has the effect of fixing the floor panel so that it does not move.
The fixing of the floor panel and the backing plate by nailing as described above can be omitted. Further, instead of the notch as described above, a hole may be formed in the edge portion of the floor panel.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various design changes can be made. Further, in FIG. 1, an arrangement form in which each floor panel is laid in parallel is shown,
Various arrangement forms are possible, for example, they can be arranged in a staggered manner. Furthermore, in the case of a floor panel of a relatively small size, it may be arranged such that several side edges in the longitudinal direction are supported by the unit support legs, but in the case of a floor panel of a relatively wide width, only the side edges of the floor panel are relatively wide. Instead, it is preferable that the unit support legs support the short side center portion and several points on the floor panel center line connecting the short side center portions.

[0040]

As described above, according to the floor panel of the present invention and the dry floor construction method using the floor panel, no gap is formed between the adjacent floor panels laid and the surface is continuous. It can be a level. In addition, the floor panel of the present invention is one in which the floor panel itself and the tongue member are separate bodies, for example, a hard plastic tongue member is fitted into the groove formed on the end surface of the floor panel and fixed by an adhesive or the like. , The tongue itself can have a stable structure with extremely high strength, and has a structure with extremely excellent resistance to shear stress in particular, and has sufficient resistance even when subjected to repeated loads by walking, Can maintain a continuous and uniform floor level for a long period of time. As a result, there is a step between floor panels each time you walk like a conventional double floor, which causes poor stability and a feeling of discomfort by feeling the step on the back of your foot, and squeaking noises occur. Such problems can be solved. Also, unlike the conventional construction method, it is not necessary to throw away the plywood, and
By attaching a finishing material such as a veneer, a veneer with a decorative groove, a synthetic resin sheet, and a carpet to the surface of the particle board, or by applying a finish coating to the surface, it functions as a floor base panel and as a floor finishing material. It is possible to use a floor panel that also has the function of, and it is possible to omit the conventional construction of waste plywood and wood finishing materials, which saves material costs, and makes the construction more efficient and simple. as a result,
It is possible to reduce the construction cost and the construction period. The other effects of the present invention and the effects of the above-described specific embodiment will be already clear from the above.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing a construction example of a floor placing method using a floor panel of the present invention.

FIG. 2 is a plan view showing an embodiment of the floor panel of the present invention.

3 is a cross-sectional view of the floor panel shown in FIG.

FIG. 4 is a partially cutaway perspective view showing a manufacturing process of the floor panel shown in FIG.

FIG. 5 is a cross-sectional view showing another embodiment of the floor panel of the present invention.

FIG. 6 is a cross-sectional view showing another embodiment of the floor panel of the present invention.

FIG. 7 is a sectional view showing still another embodiment of the floor panel of the present invention.

8 is a plan view of the floor panel shown in FIG. 7. FIG.

FIG. 9 is a partial cross-sectional side view of an example of a unit supporting leg used in the dry floor construction method of the present invention.

FIG. 10 is a plan view showing an example of a level adjusting nut used for a unit supporting leg.

FIG. 11 is a partial cross-sectional side view of another example of the unit support leg used in the dry floor construction method of the present invention.

FIG. 12 is a partial cross-sectional side view of still another example of the unit support leg used in the dry floor construction method of the present invention.

FIG. 13 is a partially cutaway perspective view of an example of a joist unit used in the dry floor construction method of the present invention.

FIG. 14 is an exploded perspective view showing an example of a joist receiving bracket used in the dry floor construction method of the present invention.

FIG. 15 is a perspective view showing another example of the L-shaped receiving member of the joist receiving bracket.

FIG. 16 is a partial cross-sectional side view showing another construction example of the dry floor construction method of the present invention.

FIG. 17 is a partial sectional side view showing still another construction example of the dry floor construction method of the present invention.

FIG. 18 is a partial cross-sectional side view showing another construction example of the dry floor construction method of the present invention.

FIG. 19 is a partial sectional side view showing still another construction example of the dry floor construction method of the present invention.

FIG. 20 is a partial sectional side view showing still another construction example of the dry floor construction method of the present invention.

[Explanation of symbols]

1 foundation floor, 2 walls or partitions 10, 10a, 10
b, 10c, 10d floor panel, 11 particle board, 12 groove part, 13 tongue member, 14 finishing material,
15 Tapered surface, 16 Veneer, 17 Decorative groove, 18
Notch part, 19a, 19b Embedded member, 20, 20
a, 20b Unit support leg, 21, 21a, 21b
Floor base, 23, 23a, 23b Support bolt, 29
Level adjustment nut, 30 support, 31 support plate, 3
5 Double-sided adhesive sheet, 36 air chamber, 37 groove, 40
Joist unit, 41 joist, 43 collar nut, 44
Support bolt, 45 rubber pedestal, 46a, 46b joist receiving bracket, 47a, 47b L-shaped receiving member, 48a,
48b Side wall, 49a, 49b Support leg receiving part, 51 Support leg member, 55 joist, 60 nail, 61 nut, 6
2 level adjustment base material

Claims (11)

[Claims] 1. A floor panel comprising a rectangular particle board in which grooves are formed along the longitudinal direction on each of the end faces of four sides, and a tongue member is fixed to the groove parts of a pair of orthogonal end faces. . 2. The floor panel according to claim 1, wherein the tongue member is formed of a hard plastic having a substantially elliptical cross section. 3. A veneer on the surface of the particle board,
The floor panel according to claim 1 or 2, wherein a finishing material selected from the group consisting of a veneer having a decorative groove processing, a synthetic resin sheet, and a carpet is attached. 4. The floor panel according to any one of claims 1 to 3, wherein the surface of the particle board is subjected to finish coating. 5. A dry floor construction method in which a group of unit support legs and a group of floor panels are combined, wherein the unit support legs are attached to a rod-shaped leg and an upper end of the rod-shaped leg so as to be vertically adjustable. While using a unit support leg having a backing plate and having an adhesive layer on the upper surface of the backing plate, as the floor panel, a rectangular particle board in which grooves are formed along the longitudinal direction on each end face of the four sides, Using a floor panel in which a tongue member is fixed to the groove portions of a pair of orthogonal end surfaces, the unit support legs are arranged on the floor surface of the foundation floor at a predetermined pitch, and the floor panel is provided with a predetermined edge portion. Fitting the tongue member or groove portion of the other floor panel to the groove portion or tongue member of the adjacent floor panel so that the location is supported by the unit support leg and fixed by the adhesive layer on the upper surface of the receiving plate. Together However, the dry floor construction method is characterized in that the floor panels are laid in such a manner that they are sequentially arranged and supported by the unit support legs at a predetermined height level. 6. A dry floor construction method performed by combining a unit support leg group and a floor panel group, wherein the unit support leg includes a level adjusting nut fitted in an insertion hole at a substantially central portion, Further, while using a unit support leg composed of a receiving plate having an adhesive layer on the upper surface, a barbed base and a rod-shaped leg portion composed of a support bolt rotatably erected on the floor base, As the floor panel, a rectangular particle board in which grooves are formed along the longitudinal direction on each end surface of the four sides, a floor panel in which a tongue member is fixed to the groove portions of a pair of orthogonal end surfaces is used. The unit support legs are arranged on the floor surface of the unit at a predetermined pitch, and the floor panel is provided with a predetermined edge portion at least partly exposing the upper end of the level adjusting nut on the upper surface of the receiving plate of the unit support leg. Place it like After fixing with the adhesive layer on the upper surface of the receiving plate and rotating the support bolt to adjust it to a predetermined height level, an adhesive is injected from the upper end of the level adjusting nut to adjust the level adjusting nut and it. Secure the upper end of the screwed support bolt, and then insert the tongue member or groove of another floor panel into the groove or tongue member of the end face of the floor panel fixed to the upper surface of the receiving plate of the unit support leg. The dry floor construction method characterized in that the floor panel is laid in a state of being supported at a predetermined height level by the unit support legs by sequentially repeating the steps of fitting and fixing to the upper surface of the receiving plate of the unit support legs with an adhesive layer. . 7. A dry floor construction method performed by combining a group of unit support legs and a group of floor panels, wherein the unit support legs include a level adjusting nut fitted in an insertion hole at a substantially central portion, Further, while using a unit support leg composed of a receiving plate having an adhesive layer on the upper surface, a barbed base and a rod-shaped leg portion composed of a support bolt rotatably erected on the floor base, As the floor panel, a rectangular particle board in which grooves are formed along the longitudinal direction on each end surface of the four sides, a floor panel in which a tongue member is fixed to the groove portions of a pair of orthogonal end surfaces is used. The unit support legs are arranged on the floor surface of the unit at a predetermined pitch, and a thin level adjusting base material is supported by the unit support legs, and a predetermined gap is provided so that the upper end face of the support bolt is exposed. And place it above After fixing with the adhesive layer on the upper surface of the backing plate and rotating the support bolt to adjust the level adjusting base material to a predetermined height level, inject adhesive from the upper end of the level adjusting nut to adjust the level. The nut and the upper end of the support bolt screwed to the nut are fixed to each other, and then the floor panel is placed on the groove or the tongue member of one adjacent floor panel on the level adjusting base material thus laid. The dry floor construction method characterized in that the tongue members or groove portions of the floor panel are sequentially laid while being fitted. 8. The floor panel has tongue members made of a hard plastic having a substantially elliptical cross section fixed to the groove portions of a pair of end surfaces of a particle board which intersect at right angles, and the surface thereof is provided with a veneer and a decorative groove. The dry floor construction method according to any one of claims 5 to 7, which is a floor panel to which a finishing material selected from the group consisting of a veneer, a synthetic resin sheet, and a carpet is attached. 9. A dry floor construction method performed by combining a group of unit support legs and a group of floor panels, wherein the unit support legs include a level adjusting nut fitted in an insertion hole at a substantially central portion, And a rod-shaped leg portion including a receiving plate having an adhesive layer on the upper surface thereof, a floor-contacting base, and a support bolt rotatably erected on the floor-contacting base and having a groove on the upper end surface thereof. While using the support legs, as the floor panel, a rectangular particle board in which grooves are formed along the longitudinal direction on each end surface of the four sides, the tongue member is fixed to the groove portions of a pair of orthogonal end surfaces, A floor panel provided with holes or notches at the edges corresponding to the arrangement pitch of the unit support legs and having a dimension substantially equal to or larger than the diameter of the support bolts is used on the floor surface of the foundation floor. Specified unit support leg The floor panel, the floor panel is supported by the unit support legs at predetermined edge portions so that the holes or notches align with the support bolts of the unit support legs, and the adhesive layer on the upper surface of the receiving plate. So that they can be fixed by fitting the groove or tongue member of the adjacent floor panel to the tongue or groove member of the other floor panel while fitting them in order, and rotating the support bolt to adjust the height level. After that, an adhesive is injected from the upper end of the level adjusting nut to fix the level adjusting nut and the upper end of the support bolt screwed to the level adjusting nut, and then to the hole or notch of the floor panel. A dry floor construction method in which an embedding member of substantially the same size is embedded and a finishing material is covered. 10. The dry floor construction method according to claim 9, wherein the embedding member is formed integrally with the finishing material. 11. The dry floor construction method according to claim 5, wherein the floor panel is nailed to a receiving plate of the unit supporting leg.