JP3227245B2 - Dry double floor construction method and dry double floor unit used therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a double floor by forming a space between existing foundation floors in various buildings such as condominiums, and a dry double floor unit used therefor.
In particular, the present invention relates to an arrangement of members for closing a gap between floor panels and each floor panel.

[0002]

2. Description of the Related Art A double floor is made up of a plurality of floor panels (floor boards) formed of wood, metal, concrete, calcium silicate-based material, etc., at a fixed height by a plurality of support legs arranged on a foundation floor. The space between the existing floor and the double floor is designed to support various pipes such as water supply and drain pipes, gas pipes, and electrical and communication wiring. Air-conditioning ducts for installing air-conditioning ducts and air-conditioning ducts under the floor, spaces for laying heat insulation and soundproofing materials under the floor, and air-conditioning ducts to enhance the sound insulation effect or heat insulation effect It is used as such.

In the conventional double floor construction method, a floor unit is arranged on a foundation floor without a gap or a predetermined gap is provided, and a discarded plywood is stretched on the floor unit. If a floor finishing material, especially a soft finishing material such as a CF sheet or carpet, is laid directly on the laid floor unit without laying the plywood, the floor units are adjacent even if they are arranged without gaps. A step occurs between the floor units. On the other hand, in the case where a gap is provided, the gap is dented every time a person walks, making it difficult to walk, and the strength of the gap is problematic. Therefore, the plywood had to be thrown away. Therefore, an increase in cost due to the material cost of the discarded plywood, an increase in labor costs due to the labor of stretching the discarded plywood, and an increase in the construction period are inevitable. However, there is a need for a low-cost dry double floor construction method that takes as little effort as possible, reflecting the current shortage of labor and rising prices.

JP-A-3-17348 discloses a unit support leg group comprising a rod-shaped leg and a receiving plate mounted on the upper end of the rod-shaped leg so as to be vertically adjustable, and a fixed-sized rectangular floor panel group. A method of constructing a dry double floor using a combination of the above is disclosed. In this method, the unit supporting legs are arranged at a predetermined pitch on the floor surface of the foundation floor, and the floor panel arranged via a predetermined gap is moved by the unit supporting legs at a predetermined position on the edge and the longitudinal center line thereof. I support it.
According to this method, the floor panels can be laid relatively easily and efficiently. However, even in this construction method, since the edges of the floor panels are supported by the unit supporting legs with a space between the adjacent floor panels, a discarded plywood is placed on the upper surface of the laid floor panel, and furthermore, Spread the floor covering on the floor. If you do not spread the discarded plywood, every time you step on the gap between the floor panels when walking, you will feel the gap at the sole of your feet, and in general, weight on one of the floor panels As a result, there is a problem that a step is generated between the floor panels and stability is deteriorated, and that the step is felt on the sole of the foot to cause a sense of incongruity.

[0005]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for constructing a dry double floor in a relatively simple manner without the use of discarded plywood. Furthermore, an object of the present invention is to provide a uniform floor that does not generate a step even when the user steps on the gap between the floor panels with a foot when walking, even though the discarded plywood is not used. It is an object of the present invention to provide a method capable of constructing a dry double floor at a surface level. Furthermore, an object of the present invention is to provide a dry double floor that has sufficient strength without using a discarded plywood even when a thin soft finishing material such as a CF sheet or a carpet is used, and can make the construction more efficient and simplified. It is an object of the present invention to provide a construction method. Another object of the present invention is to provide a dry double floor unit that can be advantageously used for the construction of a dry double floor as described above.

[0006]

According to the present invention, in order to achieve the above object, a unit support leg comprising a rod-like leg and a receiving plate mounted on the upper end of the rod-like leg so as to be vertically adjustable. In a dry double floor construction method for laying floor panels using a combination of groups and square and / or rectangular floor panels, (A) a plurality of unit supporting legs are provided on a floor surface of a foundation floor. (B) arranging a plurality of floor panels via a predetermined gap so as to be supported by the unit supporting legs at the edges thereof, and (B) outer periphery of a lower end portion of the rotating shaft. Using a cutting tool having a grooving blade and having a rotary cutting blade protruding at a predetermined upper portion thereof, a groove is formed along the edge along the edge at the same time as the step processing of the upper edge of each adjacent floor panel. The step of processing, and (C) adjacent floor panel An elongated sheet-like upper member having a width wider than the gap and a thickness substantially equal to the depth of the step formed in the above step (B), and a lower portion spaced apart from a side edge of the upper member by a predetermined distance A flexible gap closing member integrally formed from at least two parallel elongated leg members hanging down, and provided with claw portions projecting outward at lower portions of both leg members, The leg members are inserted into the gaps between adjacent floor panels so that the longitudinal edges of the sheet-like upper members are placed on the steps at the upper edges of the floor panels formed in the step (B). And a step of fitting claws protruding outwardly of the leg members on both sides into grooves formed on the end surface of the floor panel to close a gap between adjacent floor panels. Is provided.

Further, according to the present invention, as another aspect,
A unit support leg group comprising a rod-shaped leg and a receiving plate mounted on the upper end of the rod-shaped leg so as to be vertically adjustable;
Alternatively, in a dry double floor construction method in which floor panels are laid using a combination of rectangular floor panel groups, (A) a plurality of unit supporting legs corresponding to the shape of the floor panel on the floor surface of the foundation floor. A step of arranging a plurality of floor panels at a predetermined pitch and arranging a plurality of floor panels via a predetermined gap so as to be supported by the unit supporting legs at the edges thereof, and (B) forming a step at an upper edge of each floor panel. (C) forming a groove along the edge of the end face of the adjacent floor panel, and (D) a width wider than the gap between the adjacent floor panels and the step formed in the step (B). An elongated sheet-like upper member having a thickness substantially equal to the depth of the portion, and at least two parallel elongated leg members hanging downward at a predetermined distance from a side edge of the sheet-like upper member. Formed on the outside and below the leg members on both sides Using a flexible gap closing member provided with a protruding claw portion, the longitudinal edge of the sheet-like upper member is placed on the step portion at the upper edge of the floor panel formed in the step (B). The leg members are inserted into the gaps between the adjacent floor panels so as to be placed, and the claws protruding outwardly of the leg members on both sides are fitted into the grooves formed on the end surfaces of the floor panels to be adjacent to each other. A method for constructing a dry double floor, comprising a step of closing a gap between floor panels.

Still further, according to the present invention, (a) a receiving plate having an insertion hole at the center and an adhesive sheet adhered to the upper surface, and an upper portion thereof is fitted into the insertion hole of the receiving plate; And a level adjustment nut having an annular support portion protruding from the outer periphery, a support bolt having an upper threaded portion screwed to the level adjustment nut, and a pedestal fixed to a lower end portion of the support bolt. A plurality of unit support legs configured; (b)
A plurality of square and / or rectangular floor panels in which a step is formed at the peripheral upper edge and a groove is formed along the edge at the peripheral end face; and (c) a thickness substantially equal to the depth of the step of the floor panel. And an elongated sheet-like upper member having at least two parallel elongated leg members which are suspended downward at a predetermined distance from a side edge of the sheet-like upper member. A dry double-floor unit comprising: a plurality of flexible gap closing members provided with claw portions projecting outward at lower portions of the leg members.

[0009]

According to the present invention, a plurality of unit support legs are arranged on the floor surface of the foundation floor at a predetermined pitch corresponding to the shape of the floor panel, and are supported at the edges by the unit support legs. A step is formed on the upper edge of each adjacent floor panel arranged with a predetermined gap as described above, and a groove is formed on the end face along the edge, and then wider than the gap between the adjacent floor panels. An elongated sheet-shaped upper member having a width and a thickness substantially equal to the depth of the step portion, and at least two parallel elongated leg members suspended downward at predetermined intervals from side edges of the sheet-shaped upper member; And a flexible gap closing member provided with claw portions projecting outward at the lower portions of the leg members on both sides, and a longitudinal edge of the sheet-like upper member is formed on the floor. It is placed on the step at the top edge of the panel As described above, the leg members are inserted into the gaps between the adjacent floor panels, and the claws protruding outwardly of the leg members on both sides are fitted into the grooves formed on the end surfaces of the floor panels, so that the space between the adjacent floor panels is provided. This is to close the gap.
Therefore, the gap between the adjacent floor panels can be easily closed by the gap closing member without using an adhesive, and the claw protruding outside the lower portion of the leg member of the gap closing member is once attached to the floor panel. Are fitted into the groove formed on the end face of the, so that it does not easily come off. In addition, since the thickness of the sheet-like upper member of the gap closing member is equal to the depth of the step formed at the upper edge of the floor panel, the surface of the gap closing member inserted into the gap between the adjacent floor panel and the adjacent floor panel is flush. Becomes In this way, a double floor can be constructed extremely easily, and since the edges of each floor panel are stably supported by the unit support legs, there is no problem in the strength of the gap between the floor panels, and Since the gap closing member has sufficient strength and flexibility, even if one of the floor panels weighs on one of the floor panels during walking, the gap between the floor panels is increased. A smooth surface is formed on the portion by the flexible gap closing member. Therefore, there is no sense of incongruity that a gap or a step is felt on the sole of the foot as in the related art. Also,
CF sheets, carpets, etc. can be constructed without having to stretch the plywood as in the related art.

The steps at the upper edge of each floor panel and the grooves at the end faces may be processed at the construction site, or may be laid using floor panels already processed at the factory. When processing at a construction site, using a cutting tool having a grooving blade on the outer periphery of the lower end of the rotating shaft and having a rotating cutting blade protruded at a predetermined upper portion thereof, the cutting tool is adjacent to a floor panel By placing it on the edge of the gap between the floor panels and moving it along the gap, it is possible to easily perform the step processing of the upper edge of each floor panel and the groove processing of the end face simultaneously.

Hereinafter, the present invention will be described more specifically with reference to the embodiments shown in the accompanying drawings. FIG.
One embodiment of constructing a dry double floor on a foundation floor 1 according to the present invention is shown. The unit support leg 4 is not different from the conventionally known one in the basic configuration. As shown in FIGS. 2 and 3, a lower end portion is planted on a vibration isolating pedestal 7 made of an elastic material such as rubber. Rod-shaped leg 5 composed of a support bolt 6 provided, a level adjusting nut 9 having an annular support portion 10 protruding from the lower end of the outer periphery, an insertion hole 12 in the center, and an adhesive sheet on the upper surface. Receiving plate 11 to which 13 is attached
It is composed of The level adjustment nut 9 is attached to the receiving plate 1
1 is attached by being fitted into an insertion hole 12 formed in the support plate 1, or a ring-shaped adhesive sheet (not shown) is further adhered to the upper surface of the support portion 10.
It can also be attached and attached to the surrounding lower surface. The support bolt 6 of the bar-shaped leg 5 is screwed into the level adjusting nut 9 fitted in the insertion hole 12 of the receiving plate 11 in this manner,
The unit support leg 4 is assembled as shown in FIG.
In addition, a minus groove 8 (a plus groove or a polygonal concave portion may be provided) is provided on the upper end surface of the support bolt 6.
The level adjustment nut 9 and the receiving plate 11 fitted with the nut 9 are moved up and down by inserting the tip of a rotating tool such as a screwdriver into the shaft and rotating the support bolt 6 of the bar-shaped leg 5. Can adjust the floor level of the floor panel supported. In use, the release paper 14 on the top surface of the adhesive sheet 13 is peeled off.

FIG. 4 shows an arrangement of floor panels. The floor panel 15 is arranged with a predetermined gap w corresponding to the diameter of the support bolt 6, and the edge of the floor panel 15 is supported by the unit support legs 4. The arrangement of the floor panels is not limited to the illustrated form, and can be arranged in any form such as a staggered form. At the site, as shown in FIG. 1, the joist or joist unit 3 is extended along a predetermined height of the room wall 2 (or partition).
And one side of the floor panel 15 is supported thereon. The other edge of the floor panel 15 that does not contact the joist is approximately 450 mm.
Is mounted on the unit support legs 4 arranged on the foundation floor 1 at a pitch of 1 in a cantilever manner. The unit support leg 4 and the floor panel 15 are attached to the support plate 11 of the unit support leg 4.
This is performed via the adhesive sheet 13 adhered to the upper surface. The insertion hole 12 of the receiving plate 11 of the unit support leg 4 is exposed from the edge of the floor panel 15. Similarly, an adjacent floor panel is mounted on the already installed unit supporting leg 4 with a predetermined gap allowing the level of the floor panel 15 to be adjusted, and similarly, another unit supporting leg is arranged and attached. Floor panel 15
(The upper surface of the receiving plate 11) is rotated by a driver or the like, the tip of which is inserted into the groove 8 formed on the upper surface of the support bolt through the insertion hole 12, to rotate the support hole of the rod-shaped leg 5 .
Adjust by turning the bolt 6 . Repeat this work for each floor panel.In narrow places where a fixed-size floor panel does not fit, such as a corner of a room, attach a joist, process the standard-size plate, adjust the dimensions, and adjust the unit support legs as appropriate. Place and spread floor panels.

Thereafter, a stepped portion is formed on the upper edge of each floor panel and a groove is formed on the end face using a cutting tool 16 as shown in FIGS. The cutting tool 16 includes a rotating cutting blade 19 fixed to a rotating shaft 18 projecting downward from the main body 17.
And a groove machining blade 22 fixed to the lower end of the rotating shaft. The rotary cutting blade 19 has a large number of blades 21 provided on the lower surface of the annular body 20 at the lower part of the cylindrical body, while the groove processing blade 22 has a large number of blades 24 protruded from the outer periphery of the lower end of the cylindrical body 23. Any of them can be attached to the rotating shaft 18 so as to be adjustable in height.
Also, the lower surface of the cutting tool 16 is placed on the floor panel surface when processing the floor panel.
The two support legs 25a, 25b, 25c, 25d are symmetrically suspended and attached, and the two opposite support legs 2
Guide members 26a, 26c having a width substantially equal to a predetermined gap w between adjacent floor panels are provided on the lower surfaces of 5a, 25c, respectively. Reference numeral 27 denotes a handle, and reference numeral 28 denotes a switch.

At the time of machining, a switch (28) of the cutting tool 16 is pressed to operate a motor (not shown) in the main body 17 to rotate the rotary shaft 18 and the rotary cutting blade 1 fixed thereto.
While rotating 9 and the grooving blade 22, the grooving blade 22 is lowered to the end of the gap w between the adjacent floor panels 15 (or the angular gap where the corners of the four floor panels face each other), and The support leg 25a is placed on the floor panel while inserting the guide member 26a projecting from the lower surface of the support leg 25a into the gap w between the floor panels, and in this state, the guide members 26a, 26c of the support legs 25a, 25c are placed. When the cutting tool 16 is moved along the gap w between the floor panels using the guide as a guide, as shown in FIGS. 7 and 8, a step 27 is formed on the upper edge of the adjacent floor panel 15 by the rotary cutting blade 19. At the same time as the cutting process is performed, a groove 28 is formed along the edge by the groove processing blade 22 in the lower portion of the floor panel end surface. Steps and grooves are formed on other adjacent floor panels in the same manner as described above. Note that the steps and grooves of each floor panel are processed in the factory, and when they are used, the processing at the construction site is unnecessary. When the step (or groove) has already been processed and only the groove (or step) is to be processed at the construction site, the cutting tool 16 is used to rotate the rotary cutting blade 19.
(Or the grooving blade 22) may be removed and used.

After finishing the steps 27 and grooves 28 of each floor panel 15 as described above, as shown in FIG. 9, it has a width wider than the gap w between the adjacent floor panels.
And an elongated sheet-shaped upper member 30 having a thickness substantially equal to the depth of the step portion 27 of the floor panel 15, and at least two lower members suspended downward from the side edge of the sheet-shaped upper member 30 at a predetermined interval. The above-mentioned sheet-like shape is formed by using a flexible gap closing member 29 which is integrally formed with the parallel elongated leg members 31 and has claw portions 32 protruding outward at lower end portions of both leg members. The leg member 31 is inserted into the gap between the adjacent floor panels so that the longitudinal edges 30a and 30b of the upper member 30 are placed on the steps 27 of the upper edge of each floor panel 15, and both sides are inserted. The claw portion 32 protruding outside of the leg member is formed in the groove portion 2 formed in the end face of the floor panel.
8 to close the gap between adjacent floor panels as shown in FIG. Further, the angular gap (the point where the gap between the floor panels intersects) above the support bolt 6 of the unit support leg 4 where the corners of the four floor panels face each other is one gap closing member 29.
Can be extended to close, or a separate cap member can be fitted. For example, as shown in FIG. 11, when adjusting the height of the floor panel, if the tip of the support bolt 6 of the bar-shaped leg 5 projects from the receiving plate 11 of the unit support leg 4, a hollow square cylindrical cap-shaped The fitting member, that is, the bolt cover 33 is fitted into the gap between the floor panels at a position corresponding to the support bolt 6. After the gap closing member 29 (and the bolt cover 33) is fitted in the gap between all the floor panels in this manner, the CF is placed on the laid floor panel 15.
A floor finishing material 34 such as a sheet or a carpet is laid (see FIG. 1).

Although the preferred embodiment of the present invention has been described above, it is needless to say that the present invention is not limited to the above-described embodiment, and various design changes can be made. For example, FIG. 12 shows a modified example of the gap closing member shown in FIG.
Another reinforcing leg member 34 is formed between 1a in parallel with these. Further, as the claw portion, FIG.
As shown in FIG. 12, it may be formed over the entire length of the leg member 31. Alternatively, as shown in FIG.
May be formed. The gap closing members 29, 29
a has sufficient strength and flexibility so that when a step is formed at the edge of the adjacent floor panel 15 during walking, it follows the step sufficiently and a gentle surface is formed in the gap. And it can be made of, for example, plastic, metal, or the like. Further, as shown in FIG. 13, an adhesive buffer sheet 35 is interposed between the step 27 of each floor panel 15 and the edges 30a, 30b of the gap closing member 29 to bond the gap closing member to the floor panel. Also, it is possible to prevent floor noises when walking and to absorb the expansion of the floor panel.
In the case where the floor finishing material as described above is a construction method that does not use discarded plywood even for CF sheets and carpets, it is possible to use special panels that are stronger than commonly used floor panels. preferable.

[0017]

Since the present invention is configured as described above, the following effects can be obtained. (B) Even if one of the floor panels is weighted by stepping on the gap between the floor panels during walking, the gap between the floor panels is gently moved by the flexible gap closing member. Since a smooth surface is formed, there is no sense of incongruity that a gap or a step is felt on the sole of the foot as in the related art. (B) By using a cutting tool having a groove processing blade on the outer periphery of the lower end portion of the rotary shaft and having a rotary cutting blade protruding at a predetermined upper portion thereof, it is possible to simultaneously perform step processing on the upper edge portion of each floor panel. Grooving of the end face can be easily performed. Also,
The gap between the adjacent floor panels can be easily closed by the gap closing member without using an adhesive, and once attached, the claw protruding outside the lower part of the leg member of the gap closing member has an end surface of the floor panel. Since it is fitted in the groove formed in the groove, it does not easily come off. Therefore, the construction and processing of the floor panel and the construction of the gap closing member can be easily performed, and the construction can be performed at each construction site by on-site processing according to the situation. Further, since the gap closing member is attached between adjacent floor panels that are already attached and stable, a floor having excellent strength and stability can be constructed without a waste plywood. (C) Conventionally, when the floor finishing material is a thin and soft material such as a CF sheet or a carpet, it has always been necessary to construct a discarded plywood on the floor panel, but in the method of the present invention, the discarded plywood is stretched. This eliminates the need and allows the floor finish to be applied directly on the floor panel, thus reducing the material cost of the discarded plywood. In addition, since the labor for constructing the discarded plywood can be omitted and the floor finishing material can be constructed by simply performing the placing work, the construction period can be shortened and the construction cost can be reduced. (D) By installing an absorbent material between the receiving plate of the unit support leg and the floor panel and between the floor panel and the gap cover material, it is possible to prevent the floor panel from rising and squeaking due to the expansion of the floor panel. Can be.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view showing an embodiment in which a gap closing member is partially installed after laying a floor panel at a normal site by the double floor installation method of the present invention.

FIG. 2 is an exploded perspective view of a unit supporting leg used in the dry double floor construction method of the present invention.

FIG. 3 is a perspective view of an assembly of the unit support legs shown in FIG. 2;

FIG. 4 is a partial plan view of a construction example up to a usual floor panel construction in the double floor construction method of the present invention.

FIG. 5 is a side view showing one embodiment of a cutting tool used for on-site processing of a step portion and a groove portion of the floor panel of the present invention.

6 is a bottom view of the cutting tool shown in FIG.

FIG. 7 is a partial side view showing a state where a step portion and a groove portion are formed on an adjacent floor panel placed on a unit supporting leg by the double floor construction method of the present invention.

FIG. 8 is a partially broken perspective view of a floor panel in which a step portion and a groove portion are processed.

FIG. 9 is a partial perspective view showing one embodiment of a gap closing member used in the present invention.

FIG. 10 is a partial perspective view of one embodiment in which a gap closing member is inserted into a gap between adjacent floor panels by the double floor construction method of the present invention.

FIG. 11 is a partial cross-sectional view showing another embodiment of the double floor construction method of the present invention, in which a cap member is inserted into a gap between floor panels corresponding to the rod-shaped legs of the unit support leg. is there.

FIG. 12 is a partial perspective view showing another embodiment of the gap closing member used in the present invention.

FIG. 13 is a partial perspective view showing still another embodiment of the double floor construction method of the present invention.

[Explanation of symbols]

1 foundation floor, 2 wall or partition, 3 edge joist or joist unit, 4 unit supporting leg, 5 rod-shaped leg,
6 support bolt, 7 anti-vibration pedestal, 8 minus groove, 9 level adjustment nut, 10 support part, 1
1 receiving plate, 12 insertion hole, 13 adhesive sheet,
15 floor panel, 16 cutting tool, 17 body,
18 rotating shaft, 19 rotating cutting blade, 21, 24
Blade, 22 groove processing blade, 25a, 25b, 25c, 25
d support leg, 26a, 26c guide member, 27
Step portion, 28 groove portion, 29, 29a gap closing member, 30 sheet-like upper member, 30a, 30b edge portion,
31, 31a, 34 leg member, 32, 32a claw portion, 33 bolt cover

Claims (6)

(57) [Claims] 1. A floor using a combination of a unit support leg group consisting of a rod-shaped leg and a receiving plate mounted on the upper end of the rod-shaped leg so as to be vertically adjustable, and a square and / or rectangular floor panel group. In the method of constructing a dry double floor for laying panels, (A) a plurality of unit supporting legs are arranged on a floor surface of a foundation floor at a predetermined pitch corresponding to the shape of the floor panel, and the plurality of floor panels are arranged. (B) arranging a predetermined gap so as to be supported by the unit supporting leg at the edge;
Using a cutting tool having a grooving blade on the outer periphery of the lower end of the rotary shaft and having a rotary cutting blade protruding at a predetermined location on the upper surface, simultaneously with the step processing of the upper edge of each adjacent floor panel, A step of forming a groove along the edge, and (C) an elongated sheet having a width wider than a gap between adjacent floor panels and a thickness substantially equal to the depth of the step formed in the step (B). An upper member and at least two parallel elongated leg members which are suspended downward at a predetermined interval from a side edge of the sheet-like upper member are integrally formed, and are outwardly provided at lower portions of both leg members. Using a flexible gap closing member provided with a protruding claw portion, the longitudinal edge of the sheet-like upper member is placed on the step portion at the upper edge of the floor panel formed in the step (B). The leg members in the gap between adjacent floor panels so that Inserting a claw portion protruding outside of the leg members on both sides into a groove formed on an end surface of the floor panel to close a gap between adjacent floor panels. Construction method of heavy floor. 2. A floor using a combination of a unit support leg group consisting of a rod-shaped leg and a receiving plate mounted on the upper end of the rod-shaped leg so as to be vertically adjustable, and a square and / or rectangular floor panel group. In the method of constructing a dry double floor for laying panels, (A) a plurality of unit supporting legs are arranged on a floor surface of a foundation floor at a predetermined pitch corresponding to the shape of the floor panel, and the plurality of floor panels are arranged. (B) arranging a predetermined gap so as to be supported by the unit supporting leg at the edge;
Forming a step at the top edge of each floor panel, (C) forming a groove along the edge on the end face of the adjacent floor panel, and (D) a width wider than the gap between the adjacent floor panels. And an elongated sheet-like upper member having a thickness substantially equal to the depth of the step formed in the step (B), and at least two vertically suspended members spaced apart from a side edge of the sheet-like upper member by a predetermined distance. Using a flexible gap closing member formed integrally with the parallel elongated leg members and having claw portions protruding outward at the lower portions of both leg members, The leg members are fitted into gaps between adjacent floor panels so that the longitudinal edges are placed on the steps at the upper edge of the floor panel formed in the step (B), and the leg members on both sides are inserted. Hooks that protrude outwards into the grooves formed on the end face of the floor panel Combined, the construction method of dry double bed, characterized by comprising the step of closing the gap between adjacent floor panels. 3. The method according to claim 1, further comprising, after laying the floor panel, adjusting a height of a receiving plate of the unit supporting leg to keep the level of the floor panel constant. 4. The method according to claim 1, further comprising the step of laying a floor finish on the upper surface of the floor panel after assembling the floor panel and the gap closing member. 5. A receiving plate having an insertion hole in the center and having an adhesive sheet adhered to the upper surface, and an upper portion thereof is fitted into the insertion hole of the receiving plate and protruded from the outer periphery. A plurality of units each including a level adjustment nut having an annular support portion, a support bolt having an upper threaded portion screwed to the level adjustment nut, and a pedestal fixed to a lower end portion of the support bolt. (B) a plurality of square and / or rectangular floor panels in which a step is formed at the peripheral upper end edge and a groove is formed along the edge at the peripheral end face, and (c) the step of the floor panel An elongated sheet-like upper member having a thickness substantially equal to the depth of the portion, and at least two parallel elongated leg members hanging downward at a predetermined distance from a side edge of the sheet-like upper member. And protruded outward at the lower part of the leg members on both sides A dry double floor unit comprising a plurality of flexible gap closing members provided with claw portions. 6. The corners of the four floor panels are formed opposite to each other.
Into the gap above the support bolt on the unit support leg.
The dry double floor unit according to claim 5, further comprising a plurality of hollow cap members.