Floor panel, floor panel support structure, and floor panel supporter

Abstract

The floor panel according to the present disclosure has a core material (2), a lower plate (4), and an upper plate (3). The core material (2) has an upper surface (2a), a lower surface (2b), and a side surface (2c). The lower plate (4) has a lower plate covering part (4a) that covers the lower surface (2b) of the core material (2). The upper plate (3) comprises: an upper surface covering part (3a) that covers the upper surface (2a) of the core material (2); an upper plate side surface covering part (3b) that is bent continuously from the upper surface covering part (3a), and covers the side surface (2c); an upper plate side surface extending part (3c) extending downward continuously from the upper plate side surface covering part (3b); an upper plate side surface bent-back part (3d) that is bent back continuously from the upper plate side surface extending part (3c); and a joint part (30) that is bent along the lower plate covering part (4a) continuously from the upper plate side surface bent-back part (3d), and is joined onto the lower surface of the lower plate (4).

Description

Floor panel, floor panel support structure, and floor panel support

[0001] The present invention relates to a floor panel, a floor panel support structure, and a floor panel support tool that are suitable for installation above a floor slab to form a double floor.

[0002] Offices and other facilities that use a large amount of office equipment often have double floors. These double floors have a number of support legs erected on a floor slab, which support the corners of the floor panels, creating a wiring space between the floor slab and the floor panels, and cables are routed through this wiring space.

[0003] The applicant has previously proposed a floor panel for use in a double flooring system, which comprises a core material, an upper plate covering the upper surface of the core material, and a lower plate covering the lower surface of the core material, the core material having side surfaces that rise vertically from the lower surface, the lower plate having a lower surface covering portion that covers the lower surface of the core material and a lower plate side surface covering portion that is continuous with the lower surface covering portion and bent along the side surface to cover at least a part of the side surface, the upper plate having an upper surface covering portion that covers the upper surface of the core material, an upper plate side surface covering portion that is continuous with the upper surface covering portion and bent along the side surface to cover the side surface, and a joint that is continuous with the upper plate side surface covering portion and bent along the lower surface covering portion to be joined to the underside of the lower plate, the joint being deformed when the upper and lower plates are pressed from below with a pressing tool and joined to the lower plate or the core material.

[0004] These floor panels are formed by folding, not drawing, the upper and lower panels that cover the core material, so they can be manufactured as easily as origami if you have a development diagram, and there is less waste and discarded after processing, improving yield efficiency. Also, compared to drawing, folding can make the inside radius of the bent part smaller, so when placing a pre-formed core material such as particle board in the recess of the lower panel, gaps are less likely to occur, improving the filling rate and strength.

[0005] Japanese Patent Application Laid-Open No. 2023-151106

[0006] In floor panels such as those described in Patent Document 1, when the upper and lower panels are pressed together to deform the joints with the lower panel or core material, for example by burring, distortion can occur in the lower panel. In particular, if the floor panel's periphery (for example, each of the four sides in the case of a square panel) is simultaneously joined in order to improve manufacturing efficiency, distortion can accumulate inward from all of the lower panel's periphery, causing the lower panel to bulge downward and lift off the core material.

[0007] The problem that the present invention aims to solve is to provide a floor panel, a floor panel support structure, and a floor panel support that are strong, ensure the joint strength between the upper and lower panels, and can suppress distortion of the lower panel.

[0008] The floor panel of aspect 1 according to the present disclosure comprises a core material, an upper plate covering the upper surface of the core material, and a lower plate covering the lower surface of the core material, wherein the core material has side surfaces that rise vertically from the lower surface, and the lower plate has a lower surface covering portion that covers the lower surface of the core material, and the upper plate comprises an upper surface covering portion that covers the upper surface of the core material, an upper plate side surface covering portion that is continuous with the upper surface covering portion and folded along the side surface to cover the side surface, an upper plate side surface extension portion that is continuous with the upper plate side surface covering portion and extends downward, an upper plate side surface fold portion that is continuous with the upper plate side surface extension and folded along the upper plate side surface extension, and a joint portion that is continuous with the upper plate side surface fold portion and folded along the lower surface covering portion to be joined to the lower surface of the lower plate.

[0009] The floor panel of aspect 2 according to the present disclosure is characterized in that, in aspect 1, the upper plate has a regulating recess formed on the upper surface of the upper plate, and the lower plate has a regulating protrusion on the lower surface of the lower plate that can engage with the regulating recess, and the protruding length of the regulating protrusion is longer than the height of the reinforcing rib formed by the upper plate side extension portion and the upper plate side fold portion.

[0010] The floor panel of aspect 3 according to the present disclosure is characterized in that, in aspect 2, the protruding length of the regulating convex portion is longer than the sum of the height of the reinforcing rib and the depth of the regulating concave portion.

[0011] The floor panel of aspect 4 according to the present disclosure is characterized in that, in any one of aspects 1 to 3, the joint has a deformed joint that is deformed by pressing the upper plate and the lower plate from below with a pressing tool and joined to the lower plate.

[0012] The floor panel of aspect 5 according to the present disclosure is characterized in that, in any one of aspects 1 to 3, the joint has a deformed joint that is deformed by pressing the upper plate and the lower plate from below with a pressing tool, and penetrates into the lower part of the core material and is joined to the lower plate.

[0013] The floor panel of aspect 6 according to the present disclosure is characterized in that, in any one of aspects 1 to 3, the joint has a through hole, and has a deformed joint that is deformed by pressing the upper plate and the lower plate from below the through hole with a pressing tool, thereby biting into the lower part of the core material and joining to the lower plate.

[0014] The floor panel support structure of aspect 7 according to the present disclosure has a structure in which a floor panel including a core material, an upper plate covering the upper surface of the core material, and a lower plate covering the lower surface of the core material is supported by a floor panel support, and in the floor panel, the core material has a side surface rising vertically from the lower surface, the lower plate has a lower surface covering portion covering the lower surface of the core material, and the upper plate has an upper surface covering portion covering the upper surface of the core material, an upper plate side surface covering portion that is continuous from the upper surface covering portion and is bent along the side surface to cover the side surface, and a support member is provided between the upper plate side surface covering portion and the upper plate the upper panel side extension extending downward continuously from the upper panel side extension, an upper panel side fold portion continuing from the upper panel side extension and folded back along the upper panel side extension, and a joint portion continuing from the upper panel side fold portion along the lower surface covering portion and joined to the underside of the lower panel; the floor panel support has a receiving base on which the floor panel is placed, the receiving base having an accommodation groove, and the upper panel side extension and the upper panel side fold portion of the upper panel are accommodated in the accommodation groove.

[0015] The floor panel support structure of aspect 8 according to the present disclosure is characterized in that, in aspect 7, the joint is accommodated in the accommodation groove.

[0016] A floor panel support of aspect 9 according to the present disclosure is a support for supporting a floor panel comprising a core material, an upper plate covering the upper surface of the core material, and a lower plate covering the lower surface of the core material, wherein in the floor panel, the core material has a side surface rising vertically from the lower surface, the lower plate has a lower surface covering portion covering the lower surface of the core material, the upper plate has an upper surface covering portion covering the upper surface of the core material, an upper plate side surface covering portion that is continuous from the upper surface covering portion and is bent along the side surface to cover the side surface, and the upper plate side surface covering an upper plate side extension portion extending downward continuously from the upper plate side extension portion, an upper plate side fold portion continuing from the upper plate side extension portion and folded back along the upper plate side extension portion, and a joint portion continuing from the upper plate side fold portion along the lower surface covering portion and joined to the underside of the lower plate, wherein the floor panel support has a receiving base on which the floor panel is placed, and the receiving base has an accommodation groove capable of accommodating the upper plate side extension portion and the upper plate side fold portion.

[0017] A floor panel support according to a tenth aspect of the present disclosure is the same as that of the ninth aspect, characterized in that the accommodation groove is further capable of accommodating the joint portion.

[0018] The floor panel of the present invention has a reinforcing rib formed on the upper plate, which consists of an upper plate side extension that extends downward from the upper plate side covering portion and an upper plate side fold that continues from the upper plate side extension and is folded back along the upper plate side extension, thereby increasing the strength of the peripheral edge of the floor panel. Furthermore, the upper plate side fold of the reinforcing rib presses and supports the joint from below, thereby suppressing distortion of the lower plate and increasing the joint strength between the upper and lower plates compared to a panel simply folded back without a reinforcing rib. Furthermore, it is possible to omit or reduce the number of locations where burring or other processes are performed to press and deform the joint to join it to the core material or lower plate, further suppressing distortion of the lower plate.

[0019] In addition, if a regulating recess is formed on the upper surface of the upper plate, and a regulating protrusion that can engage with the regulating recess is formed on the lower surface of the lower plate, and the protruding length of the regulating protrusion is made longer than the height of the reinforcing rib formed by the upper plate side extension portion and the upper plate side fold portion, even if the panels are stacked without engaging the regulating protrusion and regulating recess, the reinforcing rib will not come into contact with the upper surface of the lower floor panel, preventing damage to the joint or reinforcing rib.

[0020] In addition, if the protruding length of the regulating convex portion is made longer than the sum of the height of the reinforcing rib and the depth of the regulating recess, when the regulating convex portion and the regulating recess are engaged and stacked, the reinforcing rib will not come into contact with the upper surface of the lower floor panel, preventing damage to the reinforcing rib or joint.

[0021] In addition, the bent joint of the upper plate is deformed and joined to the lower plate by pressing the upper and lower plates from below with a pressing tool, so there is no downward protrusion on the underside of the joint, and even if the overlapping floor panels shift, they will not get caught and the joint will not be damaged.In addition, no separate joining tool is required, making it easy to join.

[0022] In addition, the bent joint of the upper plate is deformed by pressing the upper and lower plates from below with a pressing tool, and is inserted into the lower part of the core material and joined to the lower plate, making the upper and lower plates less likely to peel off and creating a strong structure.

[0023] In addition, the bent joint of the upper plate has a through hole, and when the upper and lower plates are pressed from below the through hole by a pressing tool, the plate is deformed and bites into the lower part of the core material, joining it to the lower plate, making it easy to position the pressing tool and also facilitating efficient deformation and joining.

[0024] According to the floor panel support structure and floor panel support of the present invention, the receiving base on which the floor panel is placed is provided with an accommodation groove, and the upper plate side extension and upper plate side fold portion of the floor panel are accommodated in the accommodation groove, so that the floor panel does not rattle on the receiving base, and there is no need to install cushioning material or the like on the upper surface of the receiving base to absorb the protruding length of the upper plate side extension and upper plate side fold portion that protrude downward.

[0025] In addition, since the joints are accommodated in the accommodation grooves, rattling of the floor panel due to the joints overlapping below the lower plate can be prevented.

[0026] 11A and 11B are plan views of a floor panel according to a first embodiment of the present invention. FIG. 11B is a bottom view of a floor panel according to the first embodiment of the present invention. FIG. 11C is a cross-sectional view taken along line A-A in FIG. 1. FIG. 11D is a cross-sectional view taken along line B-B in FIG. 1. FIG. 1D is a cross-sectional view of a main portion of a floor panel according to the first embodiment of the present invention during manufacture. FIG. 1D is a cross-sectional view of a main portion of a floor panel support structure according to the first embodiment of the present invention. FIG. 1D is a cross-sectional view of a main portion of a storage groove formed along a nut portion in a floor panel support structure according to the first embodiment of the present invention. FIG. 1D is a cross-sectional view of a main portion of a storage groove formed along a partition wall in a floor panel support structure according to the first embodiment of the present invention. FIG. 1D is a plan view of a main portion of a floor panel support structure according to the first embodiment of the present invention. FIG. 1D is a perspective view of a cradle according to the first embodiment of the present invention. FIG. 1D is a plan view of a cradle according to the first embodiment of the present invention. FIG. 1D is a plan view of a floor panel according to a second embodiment of the present invention. FIG. 1D is an enlarged plan view of a main portion of a floor panel according to the second embodiment of the present invention. FIG. 1D is a cross-sectional view taken along line C-C in FIG. 11B. FIG. 1D is a plan view of a floor panel according to a third embodiment of the present invention. FIG. 1D is a plan view of a floor panel according to a fourth embodiment of the present invention. FIG. 1D is a plan view of a floor panel according to a fifth embodiment of the present invention. FIG. 1D is a plan view of a floor panel according to a sixth embodiment of the present invention.

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings, etc. It should be noted that the present invention is not limited to the embodiments.

[0028] First Embodiment A first embodiment of the present invention will be described below with reference to FIGS.

[0029] Figure 1 is a plan view of a floor panel relating to the first embodiment, Figure 2 is an underside view of the floor panel, Figure 3 is an A-A cross-sectional view of Figure 1, Figure 4 is a B-B cross-sectional view of Figure 1, Figure 5 is a cross-sectional view of key parts during manufacture of the floor panel, Figures 6A, 6B, and 6C are cross-sectional views of key parts of the floor panel support structure, Figure 7 is a plan view of key parts of the floor panel support structure, Figure 8 is an oblique view of the receiving base, and Figure 9 is a plan view of the receiving base.

[0030] As shown in Figures 1 to 4, the floor panel 1 of this embodiment is approximately square with sides 1a measuring approximately 500 mm in length and width, and comprises a core material 2, an upper plate 3 covering the upper surface 2a of the core material 2, and a lower plate 4 covering the lower surface 2b of the core material 2.

[0031] The four corners 1b of the floor panel 1 are formed with triangular chamfered portions 20, and a step portion 21 is formed on the upper surface of each corner 1b. The step portion 21 is formed approximately 4 to 5 mm lower than the upper surface, which is the tread surface, of the floor panel 1. A rising portion 22 is formed from the upper surface of the floor panel 1 and continues to the step portion 21.

[0032] In a plan view, the rising portion 22 is linear and parallel to the end face of the chamfered portion 20. The rising portion 22 is also slightly inclined so as to gradually approach the end face of the chamfered portion 20 as it extends downward.

[0033] The core material 2 is made of a wood material, such as particle board, and has a thickness of, for example, approximately 20 mm. In particular, the particle board used as the core material 2 can have a three-layer structure with dense, hard layers on the front and back and a relatively coarse, soft layer in the middle, which can efficiently ensure bending strength. Particle board is useful because bending strength is required, especially for floor panels that are expected to bear a relatively large load, such as office floors. Furthermore, a wood-based core material 2 such as particle board can fully contribute to the active use of domestic wood, against the backdrop of initiatives such as the enactment of the Act on the Promotion of the Use of Wood in Public Buildings, etc., and the Minato Model Carbon Dioxide Fixation Certification System.

[0034] The core material 2 is a rectangular parallelepiped, and has an upper surface 2a and a lower surface 2b, and has side surfaces 2c that rise perpendicularly from the lower surface 2b.

[0035] The core material 2 has a chamfered core portion 2d at each of the four corners 1b, which is triangularly chamfered to form a straight line, a stepped core portion 2e formed continuously from the chamfered core portion 2d, and a rising core portion 2f which continues from the stepped core portion 2e and rises on the upper surface 2a in a straight line parallel to the chamfered core portion 2d.

[0036] The upper plate 3 and the lower plate 4 are metal plates such as galvanized steel plates, and their thickness is about 0.3 mm, which is thinner than the thickness of the core material 2 .

[0037] The lower plate 4 has a lower surface covering portion 4a that covers the lower surface 2b of the core material 2, and a lower plate side surface covering portion 4b that is continuous with the lower surface covering portion 4a and is bent along the side surface 2c to cover at least a portion of the side surface 2c. In this embodiment, the lower plate side surface covering portion 4b is provided, but it is not necessary. At the corner 1b of the floor panel 1, the lower plate 4 does not extend beyond the lower surface 2b of the core material 2, and is not bent along the cornered core portion 2d of the core material 2.

[0038] The length of one side of the upper plate 3 is longer than the sum of the length of one side of the core material 2 and twice the thickness of the core material 2. The upper plate 3 includes an upper surface covering portion 3a that covers the upper surface 2a of the core material 2, an upper plate side surface covering portion 3b that is continuous with the upper surface covering portion 3a and is folded along the side surface to cover the side surface 2c, an upper plate side surface extension portion 3c that is continuous with the upper plate side surface covering portion 3b and extends downward, an upper plate side surface folded portion 3d that is continuous with the upper plate side surface extension 3c and is folded back along the upper plate side surface extension 3c, and a joining portion 30 that is continuous with the upper plate side surface folded portion 3d and is folded along the lower surface covering portion 4a to be joined to the lower surface of the lower plate 4.

[0039] The double folded upper plate side extension portion 3c and the upper plate side folded portion 3d form a reinforcing rib 32 that protrudes downward from the outer periphery of the lower surface of the floor panel 1.

[0040] The joining portion 30 is pressed against and supported by the upper plate side face folded portion 3d, which is folded back along the upper plate side face extension portion 3c, and joined to the lower surface of the lower plate 4. Therefore, the joining strength can be increased compared to when the joining portion is joined to the lower plate by simply bending the upper plate side face covering portion 3b.

[0041] Furthermore, if the joint 30 is simply bent from the upper plate side surface covering portion 3b when joining the lower plate 4, force is likely to act laterally (from the periphery of the floor panel 1 toward the center) on the underside of the lower plate 4, causing the lower plate 4 to distort and bulge downward, but because the joint 30 is formed from the reinforcing rib 32, no force acts laterally on the underside of the lower plate 4, and only a pressing force acts from below, making the lower plate 4 less likely to distort and causing downward bulging. This is particularly effective in cases where the lower plate 4 does not have a lower plate side surface covering portion 4b.

[0042] Furthermore, it is possible to omit or reduce the number of locations where burring or the like is performed to press and deform the joint 30 to join it to the core material 2 or the lower plate 4, thereby further suppressing distortion of the lower plate 4. The provision of the reinforcing ribs 32 increases the strength of the peripheral edge of the floor panel 1, particularly its resistance to bending.

[0043] The joint 30 is folded back (so-called hemming) so that a folded piece 30 a is folded further toward the upper surface side toward the outside of the floor panel 1 .

[0044] At the corner 1b of the floor panel 1, the upper plate 3 is provided with a rising covering portion 3f that is continuous from the upper surface covering portion 3a and is bent along the rising core portion 2f of the core material 2 to cover the rising core portion 2f, a stepped covering portion 3e that is continuous from the rising covering portion 3f and is bent along the stepped core portion 2e to cover the stepped core portion 2e, a chamfered covering portion 3g that is continuous from the step covering portion 3e and is bent along the chamfered core portion 2d to cover the chamfered core portion 2d, and a corner joint portion 31 that is continuous from the chamfered covering portion 3g and is bent along the underside of the lower plate 4 to be overlapped and joined to the underside of the lower plate 4.

[0045] The chamfered portion 20 of the floor panel 1 is composed of the chamfered core portion 2d of the core material 2 and the chamfered covering portion 3g of the upper plate 3, the step portion 21 is composed of the step core portion 2e of the core material 2 and the step covering portion 3e of the upper plate 3, and the rising portion 22 is composed of the rising core portion 2f of the core material 2 and the rising covering portion 3f of the upper plate 3.

[0046] As described above, the upper plate 3 and lower plate 4 are formed by bending to cover the areas where the corners of the core material 2 are formed, so the filling rate of the core material 2 between the upper plate 3 and lower plate 4 can be increased, which is particularly effective when manufacturing a floor panel 1 by covering an already formed core material 2 such as particle board.

[0047] The corner joints 31 are folded back (so-called hemming) by folding back the folded pieces 31a toward the top surface and outward from the floor panel 1. At both ends of the corner joints 31 of each corner 1b (Fig. 2), through holes 12 are formed in the upper plate 3 and through holes 13 corresponding to the through holes 12 are formed in the lower plate 4 in the folded back portions. Burring pins are driven into the through holes 12 from below to deform the upper plate 3 and the lower plate 4, causing them to bite into the lower part of the core material 2 and join the corner joints 31 to the lower plate 4 (forming a deformed joint) (Fig. 4).

[0048] The corner joint 31 is joined to the lower plate 4 by being pressed from below and deformed by the upper plate 3 and the lower plate 4, so there is no downward protrusion on the underside of the corner joint 31, and even if the upper part of the stacked floor panel 1 shifts, it will not get caught and the corner joint 31 will not be damaged. In addition, no separate joining tool is required, making joining easy.

[0049] In addition, the corner joint 31 is deformed when the upper plate 3 and the lower plate 4 are pressed from below, and bites into the lower part of the core material 2 to be joined to the lower plate 4, making it difficult for the upper plate 3 and the lower plate 4 to peel off, resulting in a strong structure.

[0050] Furthermore, the corner joint 31 has a through hole 12, and the upper plate 3 and the lower plate 4 are deformed and joined to the lower plate 4 by being pressed from below the through hole 12, making it easy to position the pressing tool and also facilitating efficient deformation and joining.

[0051] The upper plate 3 has a restricting recess 11 formed on its upper surface. Specifically, a restricting recess 11 capable of engaging with a restricting protrusion 10 formed on the underside of another floor panel 1 is formed at the center of each of four divided sections on the upper surface of the floor panel 1, the divided sections being separated by vertical and horizontal center lines. The recess shape of the restricting recess 11 is such that it can accommodate a portion of the restricting protrusion 10.

[0052] 3, the back surface 110 of the restricting recess 11 is formed in close contact with a hole 111 provided in the upper surface 2a of the core material 2. Specifically, by pressing the upper plate 3 from above with a pressing tool (not shown) at a position corresponding to the restricting protrusion 10, the restricting recess 11 of the upper plate 3 and the hole 111 of the core material 2 are formed, and the back surface 110 of the restricting recess 11 and the hole 111 of the core material 2 are brought into close contact with each other.

[0053] Since the back surface 110 of the regulating recess 11 is formed in close contact with the hole 111 provided in the upper surface 2a of the core material 2, the regulating recess 11 is less likely to deform, and the regulating recess 11 and the hole 111 can be formed simultaneously by pressing from above the upper plate 3, and there is no need to align the regulating recess 11 and the hole 111 during manufacturing.

[0054] The lower plate 4 has, on its underside, restricting protrusions 10 that can engage with restricting recesses 11 of the upper plate 3 of another floor panel 1. Specifically, the lower surface of the floor panel 1 is divided into four divided areas by vertical and horizontal center lines, which are positions corresponding to the restricting recesses 11, and the restricting protrusions 10 are formed by protruding the lower plate 4 downward, respectively.

[0055] The protruding length of the regulating protrusion 10 is longer than the height of the reinforcing rib 32 formed by the upper plate side extension 3c and the upper plate side fold 3d, and longer than the sum of the height of the reinforcing rib 32 and the depth of the regulating recess 11. Specifically, the protruding length of the regulating protrusion 10 from the lower surface of the flat portion of the lower plate 4 is longer than the distance from the lower surface of the flat portion of the lower plate 4 to the lower end of the reinforcing rib 32, and is further longer than the sum of the height of the reinforcing rib 32 and the distance from the upper surface of the flat portion of the upper plate 3 to the bottom of the regulating recess 11.

[0056] If the protruding length of the regulating convex portion 10 is made longer than the height of the reinforcing rib 32, even if the regulating convex portion 10 and the regulating concave portion 11 are not engaged with each other when stacked, the reinforcing rib 32 will not come into contact with the upper surface of the lower floor panel 1, and damage to the joint 30 and the reinforcing rib 32 can be prevented.

[0057] Furthermore, if the protruding length of the regulating convex portion 10 is made longer than the sum of the height of the reinforcing rib 32 and the depth of the regulating recess 11, when the regulating convex portion 10 and the regulating recess 11 are engaged and stacked, the reinforcing rib 32 will not come into contact with the upper surface of the lower floor panel 1, preventing damage to the reinforcing rib 32 and the joint portion 30.

[0058] When a plurality of floor panels 1 are stacked before laying or during transportation, the restricting convex parts 10 and the restricting concave parts 11 of the floor panels 1 stacked one on top of the other engage with each other to restrict movement, so there is no risk of the floor panels 1 being displaced.

[0059] Furthermore, even if the overlapping floor panels 1 shift, the joints 30 and reinforcing ribs 32 of the upper plate 3 overlap the underside of the lower plate 4, and the restricting protrusions 10 also protrude from the underside of the lower plate 4, so there is no need to worry about the restricting protrusions 10 hitting the tip surfaces of the joints 30 of the upper plate 3 and causing them to peel off. The moving joints 30 and reinforcing ribs 32 move on the upper surface of the lower floor panel 1, where there are no restricting protrusions 10, so the joints 30 will not collide with the restricting protrusions 10, preventing the joints 30 from breaking and causing the upper plate 3 to peel off from the lower plate 4.

[0060] Even when multiple floor panels 1 are stacked, the restricting recess 11 will not deform because the back surface 110 is supported in close contact with the upper surface of the hole 111. Since multiple restricting protrusions 10 and restricting recesses 11 are formed (four of each in this embodiment), relative rotation between stacked floor panels 1 can also be prevented.

[0061] The floor panel 1 is manufactured, for example, as follows: The restricting protrusion 10 is formed on the lower plate 4 by pressing it with a pressing member (not shown).

[0062] Next, the lower surface 2b of the core material 2 is covered with the lower surface covering portion 4a of the lower plate 4. The lower surface 2b of the core material 2 and the lower surface covering portion 4a of the lower plate 4 may be bonded together using an adhesive or the like. The lower plate side surface covering portion 4b of the lower plate 4 is bent along the side surface 2c of the core material 2. There is a sufficient amount of core material 2 present at the corners for the bending process.

[0063] Next, the upper surface 2a of the core material 2 is covered with the upper surface covering portion 3a of the upper plate 3. The upper surface 2a of the core material 2 and the upper surface covering portion 3a of the upper plate 3 may be bonded together with an adhesive or the like. The outer peripheral edge of the upper plate 3 is folded back toward the back surface to form folded pieces 30a, 31a.

[0064] The upper surface covering portion 3 a of the upper plate 3 is pressed from above with a pressing tool (not shown) to form the restricting recess 11 in the upper plate 3 and the hole portion 111 in the core material 2 .

[0065] To form the corner 1b, the portion of the upper plate 3 that will form the corner 1b is pressed from above and bent, and the rising core portion 2f, step core portion 2e, and chamfered core portion 2d of the core material 2 are covered with the rising covering portion 3f, step covering portion 3e, and chamfered covering portion 3g of the upper plate 3. The rising core portion 2f of the core material 2 and the rising covering portion 3f of the upper plate 3, the step core portion 2e and step covering portion 3e, and the chamfered core portion 2d and chamfered covering portion 3g may be bonded together with an adhesive or the like.

[0066] The rising covering portion 3f of the upper plate 3 is bent along the rising core portion 2f of the core material 2, the stepped covering portion 3e is bent along the stepped core portion 2e, and the chamfered covering portion 3g is bent along the chamfered core portion 2d. Then, the corner joint portion 31, which has been folded back with the folded-back piece 31a, is bent along the lower surface covering portion 4a and overlapped on the lower surface of the lower plate 4. Because of the bending process, there is a sufficient amount of core material 2 at each corner.

[0067] In addition, the core material 2 is sufficiently present in areas where corners are formed in a planar view of the floor panel 1, such as the area where the side 2c of the core material 2 intersects with the cornered core portion 2d and the area where the side 2c intersects with the raised core portion 2f.

[0068] The corner joint 31 is pressed from below with a pressing tool (not shown) to deform it, a so-called burring process, and joined to the lower plate 4. The through holes 12 in the upper plate 3 and the through holes 13 in the lower plate 4 may be formed simultaneously with the burring process, or may be formed in advance.

[0069] The process of joining the corner joint 31 and the lower plate 4 and the process of forming the regulating recess 11 in the upper plate 3 may be performed in an overlapping manner. By performing the process of joining the corner joint 31 and the lower plate 4, which involves pressing from below, and the process of forming the regulating recess 11 in the upper plate 3, which involves pressing from above, in an overlapping manner, the space of the processing machine can be used effectively and the number of steps can be reduced.

[0070] To form the edge portion 1a of the floor panel 1, as shown in Figure 5, the side pressing tool P1 is brought close to the side of the core material 2 to press and bend the portion of the upper plate 3 that protrudes from the core material 2, and the end of the upper plate 3 is bent downward, so that the upper plate side covering portion 3b of the upper plate 3 covers the side surface 2c of the core material 2 from outside the lower plate side covering portion 4b.

[0071] The lower pressing tool P2 is brought close to the lower plate 4 from below and pressed, folding the portion extending downward from the upper plate side surface covering portion 3b toward the inside of the floor panel 1. At this time, by leaving a gap L between the inner surface P1a of the side pressing tool P1 and the side surface P2a of the lower pressing tool P2, the portion extending downward from the upper plate side surface covering portion 3b enters the gap L, forming an upper plate side surface extension 3c that extends continuously downward from the upper plate side surface covering portion 3b, and by pushing up with the lower pressing tool P2, the upper plate side surface fold back portion 3d is folded back continuously from the upper plate side surface extension 3c along the upper plate side surface extension 3c, forming a reinforcing rib 32, and furthermore, the upper plate side surface fold back portion 3d is folded continuously from its upper end along the lower surface covering portion 4a, forming a joint 30.

[0072] The joint 30 is pressed firmly by the lower pressing tool P2 to come into close contact with the lower plate 4, and is pressed and supported from below by the upper plate side folded-over portion 3d, thereby being joined to the lower plate 4. If a raised portion P2b formed by raising the thickness of the joint 30 is provided in a portion of the lower pressing tool P2 that is not pressing the joint 30, the raised portion P2b can also prevent the lower plate 4 from bulging downward.

[0073] The joining step of joining the joint portion 30 and the lower plate 4 and the step of forming the restriction recess 11 in the upper plate 3 may be performed in an overlapping manner. By overlapping the joining step of joining the joint portion 30 and the lower plate 4, in which pressure is applied from below, and the step of forming the restriction recess 11 in the upper plate 3, in which pressure is applied from above, the space of the processing machine can be used effectively, and the number of steps can be reduced.

[0074] The process of forming the corners 1b and the process of forming the sides 1a may be performed simultaneously or one after the other. Also, only some of the processes of forming the corners 1b and the process of forming the sides 1a may be overlapped.

[0075] 6A and 7, the floor support structure that supports the floor panels 1 has a plurality of floor panels 1 lined up above a floor slab 5 and supported by floor panel supports 6. A large number of floor panel supports 6 are erected on the floor slab 5, and the corners 1b of four floor panels 1 are butted together and supported by the floor panel supports 6. A wiring accommodation space 7 for arranging cables, etc. is formed between the floor slab 5 and the laid floor panels 1.

[0076] The floor panel support 6 includes a support leg 60, a support base 61, a pressure plate 62, and a lock screw 63. The support leg 60 has a screw shaft 600 and a base 602 that faces the lower end of the screw shaft 600 and is placed on the floor slab 5.

[0077] The support base 61 includes a cylindrical nut 610 that is screwed onto the upper portion of the screw shaft 600 , a base 611 that protrudes from the outer periphery of the cylindrical nut 610 , and a receiving base 612 that is attached to the base 611 .

[0078] By rotating the cylindrical nut 610 relative to the screw shaft 600, the length of the floor panel support 6 can be adjusted, thereby adjusting the height of the support base 61. After the height is adjusted, it can be fixed in place with a set screw 616 provided on the cylindrical nut 610.

[0079] The receiving base 612 is attached in advance by covering the base 611. The receiving base 612 is made of, for example, synthetic resin, and has a flat surface that is slightly larger than the base 611. The floor panel support 6, except for the receiving base 612, is made of, for example, metal.

[0080] As shown in Figures 8 and 9, a nut portion 614 protrudes from the center of the top surface of the receiving base 612, and four partition walls 615 are formed radially from the outer peripheral surface of the nut portion 614, dividing the top surface of the receiving base 612 into four sections.

[0081] On the upper surface of the receiving base 612, accommodation grooves 618 are formed along both side surfaces of each partition wall 615 and the outer peripheral surface of the nut portion 614. The depth of the accommodation grooves 618 is greater than the protruding length from the lower surface of the lower surface covering portion 4a to the lower end of the reinforcing rib 32.

[0082] Figure 6B is a cross-sectional view of a main portion of the floor panel support structure showing a portion of the accommodation groove 618 formed along the nut portion 614, and Figure 6C is a cross-sectional view of a main portion of the floor panel support structure showing a portion of the accommodation groove 618 formed along the partition wall 615. The width of the accommodation groove 618 formed along both side surfaces of the partition wall 615 is wider than the sum of the width of the joint portion 30 and the width of the reinforcing rib 32 (Figure 6C). The width of the accommodation groove 618 formed along the outer peripheral surface of the nut portion 614 is wider than the distance from the intersection of lines extending two adjacent peripheries of the floor panel 1 to the inner edge of the corner joint portion 31 (Figure 6B).

[0083] A peripheral wall 617 is formed along the outer periphery of the lower surface of the cradle 612, and a plurality of (four in the example shown in the figure) hooks 613 are provided at equal intervals in the circumferential direction on the lower end of the inner circumferential surface of the peripheral wall 617. The cradle 612 is placed on the upper surface of the base 611 and the hooks 613 of the cradle 612 are engaged with the lower surface of the base 611, thereby positioning the cradle 612 on the upper part of the support leg 60.

[0084] The pressure plate 62 has a thickness approximately the same as the depth of the step portion 21 (the height of the rising portion 22), and the outer shape of the pressure plate 62 is a rectangle slightly smaller than the outer shape formed by the step portions 21 of the four floor panels 1.

[0085] A screw hole 620 for inserting a lock screw 63 is formed in the center of the pressure plate 62, and a recess 621 for fitting the head of the lock screw 63 is formed on the upper surface around the screw hole 620. In addition, a plurality of (for example, four) engaging claws 631 are formed in the circumferential direction on the lower part of the neck of the lock screw 63, which abut against the underside of the screw hole 620 and engage with the pressure plate 62.

[0086] To construct the floor, as shown in Figure 6A, a base 602 is fixed onto the floor slab 5 and multiple support legs 60 are erected. The distance between the central axes of the support legs 60 is set approximately equal to the length of one side of the floor panel 1. The length of the support legs 60 is adjusted in advance according to the required height of the wiring accommodation space 7, and the height of the support base 61 is also adjusted.

[0087] Next, as shown in Figure 7, on the upper surface of the receiving base 612, the corners 1b of the floor panels 1 are placed in four compartments divided by partition walls 615, and the four floor panels 1 are arranged with the corners 1b of the panels 1 butted together. As shown in Figures 6B and 6C, the reinforcing ribs 32, joints 30, and corner joints 31 of the floor panels 1 are accommodated in the accommodation grooves 618 of the receiving base 612.

[0088] The chamfered portions 20 of the four floor panels 1 form rectangular through-holes into which nuts 614 are placed. The stepped portions 21 of the four butted floor panels 1 have a rectangular outer shape (FIG. 7).

[0089] 6A and 7, the pressure plate 62 is fitted onto the rectangular stepped portion 21. Since the rising portion 22 is inclined such that the upper portion is away from the stepped portion 21, the pressure plate 62 is guided by the rising portion 22 and easily fitted onto the stepped portion 21.

[0090] Thereafter, the lock screw 63 is threaded into the nut portion 614 through the screw hole 620 of the fitted pressure plate 62. The engagement claw 631 passes through the screw hole 620, the lock screw 63 engages with the pressure plate 62, and the pressure plate 62 presses against the step portion 21. As a result, the corner portions 1b of the four floor panels 1 are clamped between the support base 61 and the pressure plate 62, and the panels are laid stably. Alternatively, the neck portion of the lock screw 63 may be first inserted through the screw hole 620 of the pressure plate 62 to engage the engagement claw 631 with the screw hole 620, and then the lock screw 63 may be threaded into the nut portion 614.

[0091] The rising portion 22 is linear in plan view, and is fitted with one side of a pressure plate 62 that is aligned with the corner 1b of another floor panel 1 and presses the step portion 21, so that when the lock screw 63 is screwed in, the pressure plate 62 is restricted and does not spin freely, and the floor panel 1 can be reliably supported.

[0092] As shown in Figures 6B and 6C, the storage groove 618 of the receiving base 612 has a width and depth sufficient to accommodate the reinforcing rib 32, joint 30, and corner joint 31 of the floor panel 1, so that the flat underside covering portion 4a of the floor panel 1 is placed on the upper surface 612a of the receiving base 612 where the storage groove 618 is not formed, and the floor panel 1 does not rattle.

[0093] Furthermore, since the accommodation groove 618 engages with the reinforcing rib 32, the joint 30 and the corner joint 31, horizontal movement of the floor panel 1 is suppressed.

[0094] Furthermore, below the step covering portion 3e of the upper plate 3 that constitutes the step portion 21 is the step core portion 2e of the core material 2, and further below that are the corner joint portion 31 of the upper plate 3 and the lower plate 4. In other words, the core material 2 is present between the upper plate 3 and the lower plate 4 at the portion of the step portion 21 that is pressed by the pressure plate 62 and supported and held by the support base 61, increasing strength and improving deformation performance. In other words, because the core material 2 is embedded within the corner 1b of the floor panel 1 that is sandwiched between the support base 61 and the pressure plate 62, it is strong and does not easily deform even when a heavy load is applied. Furthermore, because the upper plate 3 is joined to the lower plate 4 at the corner 1b of the floor panel 1 by burring, it is not easily peeled off even by a shear force.

[0095] The floor panel 1 may be supported from below at appropriate locations except for the corners 1b by beams erected on the floor slab 5.

[0096] Furthermore, the pressure plate 62 has approximately the same thickness as the rising portion 22 of the step portion 21, and recesses 621 for fitting the heads of the lock screws 63 are formed around the screw holes 620 of the pressure plate 62, so that the upper surface of the floor is finished smoothly. Finally, a finishing material such as carpet is placed on the upper surface of the laid floor panel 1.

[0097] Second Embodiment A second embodiment of the present invention will be described below with reference to Figures 10 to 12. Note that a description of the same parts as in the first embodiment will be omitted, and differences will be mainly described.

[0098] 10 and 11, in this embodiment, a substantially rectangular cutout 14 is formed in the center of a pair of opposing side edges of the floor panel 1. The cutout 14 is used to pull out cables wired in the wiring accommodation space 7 above the floor panel 1, for example.

[0099] A notched step 15 is formed on the upper surface along the periphery of the notched portion 14. The notched step 15 is formed approximately 4 to 5 mm lower than the upper surface of the floor panel 1. A notched rising portion 16 is formed on the upper surface of the floor panel 1, continuing from the notched step 15.

[0100] 12, the core material 2 is provided with a rectangular notched core portion 2g corresponding to the notched portion 14, a stepped notched core portion 2h formed continuously from the notched core portion 2g, and a rising notched core portion 2i continuing from the stepped notched core portion 2h and rising parallel to the notched core portion 2g toward the upper surface 2a. The portion of the lower plate 4 corresponding to the notched portion 14 is cut out to be slightly larger than the notched portion 14 and is formed so as not to cover the notched core portion 2g.

[0101] The upper plate 3 is cut out in a rectangular shape corresponding to the cutout portion 14 and smaller than the cutout portion 14. The portion of the upper plate 3 that protrudes beyond the cutout portion 14 is formed by bending continuously from the upper surface covering portion 3a to form a notch rising covering portion 3h that covers the notch rising core portion 2i of the core material 2, a notch step covering portion 3i that is also bending continuously from the notch rising covering portion 3h to cover the notch step core portion 2h, a notch covering portion 3j that is also bending continuously from the notch step covering portion 3i to cover the notch core portion 2g, and a notch joint portion 33 that is also bending continuously from the notch covering portion 3j along the underside of the lower plate 4 and is overlapped and joined to the underside of the lower plate 4.

[0102] The tip of the notched joint 33 is further folded back (so-called hemming) so that a folded piece 33a is folded back onto the upper surface side.

[0103] At both ends of each side of the cutout portion 14 and at one point approximately in the middle of each side, in the folded-back portion of the cutout joint 33, a through hole 12 is formed in the upper plate 3 and a through hole 13 corresponding to the through hole 12 is formed in the lower plate 4, and by driving a burring pin from below the through hole 12, the upper plate 3 and the lower plate 4 are deformed and driven into the lower part of the core material 2, joining the corner joint 31 to the lower plate 4.

[0104] At both circumferential ends of the cutout portion 14, the end of the notch joint 33 and the end of the joint 30 of the edge portion 1a facing the cutout portion 14 are overlapped, and the through hole 12 of the notch joint 33 is aligned with the through hole 12 of the joint 30, and burring processing is performed (forming a deformed joint).

[0105] [Third Embodiment] A third embodiment of the present invention will be described below with reference to Fig. 13. Note that a description of the same parts as those in the first and second embodiments will be omitted, and differences will be mainly described.

[0106] This embodiment differs in that burring is performed not only on both ends of the corner joint 31 but also on both longitudinal ends of the joint 30. Through holes 12 are formed at both longitudinal ends of the joint 30, and burring pins are driven from below into these through holes 12 and through holes 13 in the lower plate to deform the joint, joining both ends of the joint 30 of the upper plate 3 to the lower plate 4 and core material 2 (forming a deformed joint).

[0107] The reinforcing ribs 32 may or may not be formed at both longitudinal ends of the joint 30 to be burred.

[0108] [Fourth Embodiment] A fourth embodiment of the present invention will be described below with reference to Fig. 14. Note that a description of the same parts as those in the first to third embodiments will be omitted, and differences will be mainly described.

[0109] This embodiment has a configuration similar to that of the second embodiment, but differs in that, as shown in Figure 14, burring is performed not only on both ends of the corner joint 31 but also on both ends of the joint 30 of the side portion 1a, deforming the joint 30 and joining it to the lower plate 4 (forming a deformed joint).

[0110] Fifth Embodiment A fifth embodiment of the present invention will be described below with reference to Fig. 15. Note that a description of the same parts as those in the first to fourth embodiments will be omitted, and differences will be mainly described.

[0111] This embodiment has a configuration similar to that of the third embodiment, but differs in that burring is performed not only on both ends of corner joints 31 and both ends of joint 30, but also on the longitudinal center of joint 30 of side 1a, as shown in Figure 15. Burring pins are driven from below into through-hole 12 of joint 30 at the longitudinal center of joint 30 of side 1a and through-hole 13 of lower plate 4, deforming the periphery of through-holes 12, 13 to join joint 30 to lower plate 4 (forming a deformed joint).

[0112] Sixth Embodiment A sixth embodiment of the present invention will be described below with reference to Fig. 16. Note that a description of the same parts as those in the first to fifth embodiments will be omitted, and differences will be mainly described.

[0113] The sixth embodiment is similar to the fourth embodiment, but differs in that, as shown in Figure 16, burring is performed on the longitudinal center of the joint 30 at a pair of opposing peripheries where the cutout portion 14 of the floor panel 1 is not formed, and the joint 30 of the upper plate 3 is deformed and joined to the lower plate 4 (formation of a deformed joint).

[0114] [Other Modifications] The present invention is not limited to the above-described embodiment, and includes, for example, the following.

[0115] In this embodiment, the core material 2 is made of a wood material such as particle board, but it may also be made of lightweight concrete or the like.

[0116] In this embodiment, the floor panel 1 is rectangular, but it can also be other polygonal shapes, and the number of panels laid with the corners butted together can be changed depending on the shape.

[0117] The structure of the floor panel supports 6 that support the corners of the butted floor panels 1 is also not limited to that described in this embodiment. As an example, a pressure plate may be snap-engaged with the upper ends of the support legs 60.

[0118] [Correction based on Rule 91 20.02.2025] In this embodiment, through holes 12 are provided in the joints 30, corner joints 31 or notched joints 33 of the upper plate 3, and through holes 13 are provided in the lower plate 4, but this is not limited to this. It is also possible to not provide through holes in either the upper plate 3 or the lower plate 4, but to form through holes using a pressing tool while deforming the plates to join them, or to provide a through hole in either the upper plate 3 or the lower plate 4 and then deform the plates to join them.

[0119] [Correction based on Rule 91 20.02.2025] In this embodiment, the protruding length of the regulating protrusion 10 is longer than the sum of the thickness of the joint 30 and the depth of the regulating recess 11, but this is not limited to this. As long as the protruding length of the regulating protrusion 10 is longer than the thickness of the joint 30, it may be shorter than the sum of the thickness of the joint 30 and the depth of the regulating recess 11.

[0120] In this embodiment, the corner joints 31 and the notch joints 33 are joined to the lower plate 4 by burring, but they can also be joined to the lower plate 4 by deforming them by pressing them with a lower pressing tool without driving in burring pins. In this case, reinforcing ribs 32 may be formed on the outer periphery of each of the corner joints 31 and the notch joints 33, similar to the side joints.

[0121] In this embodiment, the reinforcing rib 32, the joint 30, and the corner joint 31 are housed in the housing groove 618, but it may be such that only the reinforcing rib 32 is housed therein.

[0122] In this embodiment, no reinforcing ribs 32 are formed at the corners 1b of the floor panel 1, but this may also be used in conjunction with a method such as burring where the upper plate 3 and the lower plate 4 are joined by pressing and deforming them.

[0123] Each technical matter in any of the embodiments including the modified examples may be applied to other embodiments to be used as examples.

[0124] REFERENCE SIGNS LIST 1 Floor panel 1a Side portion 1b Corner portion 10 Restricting protrusion 11 Restricting recess 110 Back surface 111 Hole portion 12, 13 Through hole 14 Notch portion 15 Notch step portion 16 Notch rising portion 2 Core material 2a Upper surface 2b Lower surface 2c Side surface 2d Corner chamfered core portion 2e Step core portion 2f Rising core portion 2g Notch core portion 2h Notch step core portion 2i Notch rising core portion 20 Corner chamfered portion 21 Step portion 22 Rising portion 3 Upper plate 3a Upper surface covering portion 3b Upper plate side surface covering portion 3c Upper plate side surface extension portion 3d Upper plate side surface folded portion 3e Step covering portion 3f Rising covering portion 3g Corner chamfered covering portion 3h Notch rising covering portion 3i Notch step covering portion 3j Notch covering portion 30 Joint portion 31 Corner joint portion 32 Reinforcement rib 33 Notch joint portion 4 Lower plate 4a Lower surface covering portion 4b Lower plate side surface covering portion 5 Floor slab 6 Floor panel support 60 Support leg 600 Screw shaft 602 Base 61 Support base 610 Cylindrical nut 611 Pedestal 612 Receiving base 613 Hook portion 614 Nut portion 615 Partition wall 616 Set screw 617 Peripheral wall 618 Accommodation groove 62 Pressing plate 620 Screw hole 621 Recess 63 Lock screw 631 Engagement claw 7 Wiring accommodation space P1 Side pressing tool P2 Lower pressing tool

Claims

1. A floor panel comprising a core material, an upper plate covering the upper surface of the core material, and a lower plate covering the lower surface of the core material, wherein the core material has a side surface that vertically rises from the lower surface of the core material, the lower plate has a lower surface covering portion covering the lower surface of the core material, the upper plate has an upper surface covering portion covering the upper surface of the core material, an upper plate side surface covering portion that is continuously bent along the side surface from the upper surface covering portion to cover the side surface, an upper plate side surface extension portion that continuously extends downward from the upper plate side surface covering portion, an upper plate side surface folding portion that is continuously folded along the upper plate side surface extension portion from the upper plate side surface extension portion, and a joint portion that is continuously bent along the lower surface covering portion from the upper plate side surface folding portion and is overlapped and joined to the lower surface of the lower plate. A floor panel characterized by the above.

2. [Correction based on Rule 91, 20.02.2025] The upper plate has a regulating recess formed on the upper surface of the upper plate, the lower plate has a regulating projection engageable with the regulating recess on the lower surface of the lower plate, and the protruding length of the regulating projection from the lower surface of the lower plate is longer than the height of the reinforcing rib formed by the upper plate side surface extension portion and the upper plate side surface folding portion. The floor panel according to claim 1, characterized by the above.

3. The protruding length of the regulating projection from the lower surface of the lower plate is longer than the sum of the height of the reinforcing rib and the depth of the regulating recess. The floor panel according to claim 2, characterized by the above.

4. The joint portion has a deformed joint portion that is deformed by pressing the upper plate and the lower plate with a pressing tool from below and is joined to the lower plate. The floor panel according to any one of claims 1 to 3, characterized by the above.

5. The joint portion has a deformed joint portion that is deformed by pressing the upper plate and the lower plate with a pressing tool from below and bites into the lower part of the core material and is joined to the lower plate. The floor panel according to any one of claims 1 to 3, characterized by the above.

6. The joint portion is provided with a through hole, and is deformed by pressing the upper plate and the lower plate with a pressing tool from below the through hole, bites into the lower part of the core material, and has a deformed joint portion joined to the lower plate. The floor panel according to any one of claims 1 to 3, characterized by the above.

7. A floor panel support structure for supporting a floor panel comprising a core material, an upper plate covering the upper surface of the core material, and a lower plate covering the lower surface of the core material with a floor panel support. The floor panel has a core material with a side surface rising vertically from the lower surface of the core material. The lower plate has a lower surface covering portion covering the lower surface of the core material. The upper plate has an upper surface covering portion covering the upper surface of the core material, an upper plate side surface covering portion formed by bending continuously from the upper surface covering portion along the side surface to cover the side surface, an upper plate side surface extension portion extending downward continuously from the upper plate side surface covering portion, an upper plate side surface folding portion formed by folding back continuously from the upper plate side surface extension portion along the upper plate side surface extension portion, and a joint portion formed by bending continuously from the upper plate side surface folding portion along the lower surface covering portion and overlapping and joined to the lower surface of the lower plate. The floor panel support has a receiving base on which the floor panel is placed. The receiving base has a receiving groove. The upper plate side surface extension portion and the upper plate side surface folding portion are received in the receiving groove. A floor panel support structure is characterized by this.

8. The joint portion is received in the receiving groove. The floor panel support structure according to claim 7 is characterized by this.

9. A floor panel support for supporting a floor panel comprising a core material, an upper plate covering the upper surface of the core material, and a lower plate covering the lower surface of the core material. The floor panel has a core material with a side surface rising vertically from the lower surface of the core material. The lower plate has a lower surface covering portion covering the lower surface of the core material. The upper plate has an upper surface covering portion covering the upper surface of the core material, an upper plate side surface covering portion formed by bending continuously from the upper surface covering portion along the side surface to cover the side surface, an upper plate side surface extension portion extending downward continuously from the upper plate side surface covering portion, an upper plate side surface folding portion formed by folding back continuously from the upper plate side surface extension portion along the upper plate side surface extension portion, and a joint portion formed by bending continuously from the upper plate side surface folding portion along the lower surface covering portion and overlapping and joined to the lower surface of the lower plate. The floor panel support has a receiving base on which the floor panel is placed. The receiving base is characterized by having a receiving groove capable of accommodating the upper plate side surface extension portion and the upper plate side surface folding portion. A floor panel support is characterized by this.

10. The floor panel support according to claim 9, wherein the receiving groove is further capable of receiving the joint portion.

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