JPH11256804A - Floor panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor panel capable of preventing slippage in a joint section between the outside end of a top plate and the outside end of a bottom plate by simple constitution even if heavy load is applied thereto from above. SOLUTION: A core is interiorly provided between a top plate 1 of steel plate having an approximately square shaped perimeter in a plane shape and a bottom plate 3 of steel plate equipped with a recess section having an approximately square shaped perimeter. Bending pieces 5 on the peripheral ends in the top plate 1 are bent to the lower surface side of the peripheral ends in the bottom plate 3 to hold. Holding sections of the peripheral ends in the bottom plate 3 are caulked with the bending pieces 5 of the peripheral ends in the top plate 1 to fix.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor panel used for a double floor system called a free access floor which is widely used as a wiring system in an office in an office building or a computer building. .

[0002]

2. Description of the Related Art In recent years, a double-floor system has been adopted to cope with an increase in the amount of electric power, telephone and data. This double floor system, for example, has a large number of support legs standing on a floor substrate such as a concrete slab, and supports the floor panel with the support legs, thereby providing a gap between the floor panel and the floor substrate. Is used as a wiring space, and cables such as power lines and information lines are arranged in the wiring space.

As the floor panel used in the above-mentioned double floor system, for example, a flat plate-shaped steel plate top plate having a substantially rectangular periphery and a steel plate bottom plate provided with a concave portion and having a substantially rectangular periphery are provided. And a core material is interposed therebetween, and a bent piece at the outer peripheral end of the top plate is bent and sandwiched (that is, hemmed) on the lower surface side of the outer peripheral end of the bottom plate.

However, in this conventional example, the outer end of the top plate and the outer end of the bottom plate are formed by bending the bent piece of the outer end of the top plate to the lower surface of the outer end of the bottom plate as described above. The problem is that the outer peripheral edge of the top plate is shifted from the outer peripheral edge of the bottom plate when the floor panel is subjected to a large load from above because the bonding strength is only weakened by bending and clamping. There is. Here, there is a fixing method by welding, but a fixing device by welding is required separately for fixing by welding, and there is a problem that the cost is increased.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a simple structure even when a large load is applied from above. It is an object of the present invention to provide a floor panel capable of preventing a displacement at a joint portion with an outer end of the floor panel.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a floor panel according to the present invention has a flat plate-shaped top plate 1 made of a steel plate having a substantially square periphery and a concave portion 2 and has a substantially square periphery. A core material 4 is interposed between the bottom plate 3 made of a steel plate and a bent piece 5 at the outer peripheral end of the top plate 1 is bent and sandwiched on the lower surface side of the outer peripheral end of the bottom plate 3 to sandwich the top plate 1. Bent piece 5 at the outer peripheral end of
, And a clamping portion at the outer peripheral end of the bottom plate 3 is caulked and fixed. With such a configuration, the displacement of the coupling portion at the sandwiched portion due to the bending of the bending piece 5 is prevented by caulking and fixing.

Further, it is preferable to provide a support portion 7 supported by support legs at four corners of the floor panel 6, and to form a caulking fixing portion 8 near the support portion 7. With such a configuration, the corners of the floor panel 6 at the four corners are prevented from being displaced at the sandwiched portions near the support portions 7 and the floor panel 6 is prevented from being curved, whereby the support portions 7 are used as support legs. It can be stably supported.

It is preferable that a notch 9 for leading out the wiring be provided at the outer peripheral end of the floor panel 6 and a caulking fixing portion 8 be provided at the inner periphery of the notch 9 for leading out the wiring. By adopting such a configuration, it is possible to prevent a displacement of the notched portion 9 in the wiring leading cutout 9 at the sandwiched portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings. 1 to 4 show one embodiment of the present invention. 5 and 6 show another embodiment of the present invention. The floor panel 6 of the present invention comprises an outer shell composed of a flat plate-shaped top plate 1 made of a steel plate having a substantially square periphery and a bottom plate 3 made of a steel plate provided with a recess 2 and having a substantially square periphery. A core member 4 is provided between the top plate 1 and the bottom plate 3 constituting the outer shell. The outer peripheral end of the top plate 1 and the outer peripheral end of the bottom plate 3 are mechanically connected.

The core member 4 is, for example, a plate member such as a particle board having a substantially square shape in a plan view. The front and back surfaces of the core member 4 or one of the two surfaces is bonded to the top plate 1 to the bottom plate 3 with an adhesive 10. I have. Of course, the plate material may be other than the particle board, for example, a lightweight concrete panel, or any other material.

The outer peripheral end of the top plate 1 and the outer peripheral end of the bottom plate 3 are mechanically connected by the following method. That is, as shown in FIG. 3, a bent piece 5 is provided on the outer peripheral end of the top plate 1, the outer peripheral end of the top plate 1 is overlapped with the outer peripheral end of the bottom plate 3, and the bent piece 5 is placed on the top plate. 1 is bent and sandwiched on the lower surface side of the outer peripheral end portion. That is, hemming is performed. Then, in the present invention, as shown in FIG. 4, the sandwiched portion of the outer peripheral end of the bottom plate 3 by the bent piece 5 of the outer peripheral end of the top plate 1 is caulked and fixed, and the outer peripheral end of the top plate 1 is fixed. The outer peripheral end of the bottom plate 3 is fixed by clamping by the bent pieces 5 and fixed by caulking, and the outer peripheral end of the top plate 1 and the outer peripheral end of the bottom plate 3 are joined together. It is strong.

At the four corners of the floor panel 6, supporting portions 7 supported by supporting legs are formed. In the embodiment shown in the attached drawings, the four corners of the lower surface of the bottom plate 3 are supported by the supporting legs. The supporting portion 7 is supported.
That is, although not shown, a large number of support legs are erected on a floor base material such as a concrete slab, and the support portions 7 provided at the four corners of the floor panel 6 are mounted on the upper ends of the support legs. A double floor is constituted by installing and supporting. Therefore, the load applied to the upper surface of the floor panel 6 from above is supported by the support legs via the support portions 7 provided at the four corners of the floor panel 6.

In the present invention, as shown in FIG. 1 and FIG. 5, the outer peripheral end of the top plate 1 and the outer peripheral end of the bottom plate 3 near the support portions 7 at the four corners of the floor panel 6. Is further secured by a caulking fixing portion 8. That is, in the embodiment shown in FIGS. 1 and 5, the outer peripheral edge of the top plate 1 and the outer peripheral edge of the bottom plate 3 overlap at the four corners of the floor panel 6. A caulking fixing portion 8 is formed at each of the sandwiching portions near the corner on both sides of the corner where the portion where the outer peripheral end of the bottom plate 3 overlaps with the outer edge of the bottom plate 3. A caulking fixing portion 8 is formed. By forming the caulking fixing portion 8 near the corner in this way, it is possible to prevent the displacement of the floor panel 6 at the clamping portion in the vicinity of the support portion 7 at the four corners, thereby preventing the floor panel 6 from bending. Thus, the support portion 7 can be stably supported on the support leg, and the displacement at the sandwiched portion can be effectively prevented by the small caulking fixation.

In the embodiment shown in FIGS. 1 and 5, the bent portion 5 at the outer peripheral end of the floor panel 6 is bent toward the lower surface of the outer peripheral end of the top plate 1 to crimp the clamped portion. In fixing and forming the caulking fixing portion 8, in addition to the caulking fixing portions 8 at the four corners as described above, approximately the center of each side is caulked and fixed, and four portions are formed at the approximate center of each side. A total of 1
It is swaged and fixed at two places. By doing so, the bonding strength between the outer peripheral end of the top plate 1 and the outer peripheral end of the bottom plate 3 is further improved as compared with the above-described embodiment, and the displacement at the sandwiched portion is further prevented. Is what you can do.

By the way, as in the embodiment shown in FIGS. 5 and 6, one or more of the four sides of the outer peripheral end of the floor panel 6 are provided with the wiring leading Folded piece 5 at the inner periphery of notch 9 for drawer
Is crimped and fixed at the sandwiched portion where it is bent and clamped on the lower surface of the outer peripheral end portion of the top plate 1 to form the swage fixing portion 8. Thus, the notch 9 for drawing out the wiring
By providing the caulking fixing portion 8 on the inner peripheral portion of the wire, it is possible to prevent the displacement of the notched portion 9 in the wiring lead-out notch 9 at the sandwiched portion. The notched portion 9 for wiring lead has a stepped portion at the inner peripheral portion of the cutout portion 9 for wiring drawn out, and a lid is placed and supported on this stepped portion. The lid is provided with, for example, a knockout portion, and the knockout portion is knocked out to form a wiring lead portion. Of course, the wiring lead-out part may be formed in the lid in advance.

As in each of the above embodiments, the bent portion 5 at the outer peripheral end of the floor panel 6 is bent to the lower surface of the outer peripheral end of the top plate 1 and the clamped portion is partially caulked and fixed at a plurality of locations. Although an example has been described, in caulking and fixing, the caulking and fixing may be performed over the entire circumference or substantially the entire circumference of the sandwiched portion of the outer peripheral end of the floor panel 6.

The number of joints by caulking and fixing at one caulking fixing portion 8 is five caulking where there are five short caulking joints as shown in FIG. 7A, or FIG. 7B.
As shown in FIG. 7 (c), various types of caulking can be adopted, such as three caulking where there are three short caulking joints, or a long caulking having a band shape as shown in FIG. 7 (c).
The band-shaped long caulking shown in (c) is effective because the number of joints by caulking and fixing can be reduced when caulking and fixing over the entire circumference or substantially the entire circumference of the sandwiched portion of the outer peripheral end of the floor panel 6. . Of course, the form of caulking can be arbitrarily set depending on the size of the floor panel 6, the size of the sandwiching portion, and the like.

The direction of caulking is shown in FIG.
As shown in (b), the fixing may be either by caulking from the back side of the floor panel 6 or by caulking from the front side of the floor panel 6. In the case of caulking and fixing from the back side, when the caulking fixing portion 8 is exposed only on the back side and is not visible from the front side as shown in FIG. There is no unevenness due to this, and it is beautiful and has little effect on a floor finishing material (not shown) laid on the floor panel 6.

In any of the embodiments, the outer peripheral end of the top plate 1 and the outer peripheral end of the bottom plate 3 are overlapped, and the bent piece 5 is bent toward the lower surface of the outer peripheral end of the top plate 1 and sandwiched. The caulking fixation can be performed at the same time as the work of attaching, and the fixation by pinching and the fixation by caulking can be simultaneously performed by simple processing.

[0020]

According to the first aspect of the present invention, as described above, the bent piece at the outer peripheral end of the top plate is bent and clamped on the lower surface side of the outer peripheral end of the bottom plate, Since the clamped portion of the outer peripheral end of the bottom plate by the bent piece of the outer peripheral end of the top plate is caulked and fixed, the displacement of the coupling portion in the clamped portion due to the bending of the bent piece can be prevented by the caulked fixed portion. ,
With a simple configuration, the outer peripheral edge of the top plate and the outer peripheral edge of the bottom plate can be firmly joined, and there is no variation in the compressive load resistance and the deflection resistance to the floor panel. The crimping and fixing can be performed at the same time when the bent piece is bent and clamped on the lower surface of the outer peripheral end portion of the top plate, and a strong connection can be achieved with a simple processing. In addition, even during the curing period until the adhesive bonding to the core material and the bottom plate or the top plate is hardened due to the presence of the caulking fixing portion, it is possible to prevent the displacement of the coupling portion at the sandwiched portion as described above, and to achieve high quality. Floor panels can be provided.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, a support portion supported by support legs is provided at four corners of the floor panel. Since the caulking fixing part is formed nearby, it is possible to prevent the displacement of the sandwiching part near the support part and prevent the floor panel from bending, thereby stably supporting the support part on the support legs. You can do it.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, a notch for leading out a wire is provided at the outer peripheral end of the floor panel. Since the caulking fixing part is provided on the inner peripheral part of the notch for drawing out, it is possible to prevent displacement at the sandwiched part in the notch for drawing out the wire, and it is accurate to attach the lid to the notch for drawing out the wiring. The lid can be securely attached in a proper positional relationship.

[Brief description of the drawings]

FIG. 1 is a bottom view of one embodiment of a floor panel of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a cross-sectional view showing a sandwiching portion in which the above-described bent piece is bent and sandwiched.

FIG. 4A is a cross-sectional view of one embodiment showing a caulking fixing portion, and FIG. 4B is a cross-sectional view of another embodiment.

FIG. 5 is a bottom view of another embodiment of the present invention.

FIG. 6 is a perspective view of the same.

FIGS. 7 (a), (b) and (c) are explanatory views showing respective examples of the caulking fixing portion of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 2 Concave part 3 Bottom plate 4 Core material 5 Bending piece 6 Floor panel 7 Supporting part 8 Caulking fixing part 9 Notch part for wiring drawing

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tokuzo Kobayashi 635 Nika, Kawakami-cho, Kawakami-gun, Okayama Pref.

Claims (3)

[Claims] 1. A core material is interposed between a flat top plate made of a steel plate having a substantially square shape and a bottom plate made of a steel plate having a recess and a substantially square shape, and an outer periphery of the top plate. The bent piece at the end is bent and clamped on the lower surface side of the outer peripheral end of the bottom plate, and the clamped portion at the outer peripheral end of the bottom plate is bent and fixed by the bent piece at the outer peripheral end of the top plate. Characterized by floor panels. 2. The floor panel according to claim 1, wherein a support portion supported by support legs is provided at four corners of the floor panel, and a caulking fixing portion is formed near the support portion. 3. The wiring panel according to claim 1, wherein a notch portion for leading out a wire is provided at an outer peripheral end of the floor panel, and a caulking fixing portion is provided at an inner peripheral portion of the notch portion for drawing out the wiring. The described floor panel.