JPH05321447A - Free access floor panel and manufacture thereof - Google Patents

Abstract

PURPOSE:To dispense with extra material and a bending process. CONSTITUTION:A bottom plate 16 provided with a peripheral edge flange 11 and numerous spherical protruding parts 13 disposed on the upper face of the inner recessed part is spot-welded to a flat upper face plate 17 of the same outside dimension as the flange outside dimension through the flange 11 and spherical protruding parts 13 to form a free access floor panel 10. In this panel 10, plural lap preventing protrusions partially bent downward at a right angle are provided at each side of the flange peripheral edge of the bottom plate. In order to manufacture this panel 10, bottom plate material cut into specified dimension is formed into specified shape by press working, and numerous spherical protrusions 13 are formed inside. The lap preventing protrusions 15 are further formed at the flange 11 to form the bottom plate 16. This bottom plate 16 is then spot-welded to the flat upper face plate 17 of the same outside dimension as the flange outside dimension through the flange 11 and spherical protruding parts 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel for a free access floor for forming a wiring space for a computer, a personal computer and other office automation equipment on the floor of an existing office building, and a method for manufacturing the panel.

[0002]

2. Description of the Related Art As one of conventional panels for free access floors, a bottom plate 3 having a flange 1 at the peripheral edge and a large number of spherical convex portions 2 on the upper surface of an inner concave portion is provided as shown in FIG. There is a panel 5 for a free access floor, which is formed by joining the flange 1 and the spherical convex portion 2 by spot welding to a flat upper surface plate 4 having the same external dimension as the above.

This free access floor panel 5 is
As shown in FIG. 10, four corners are placed on the supporting legs 7 arranged vertically and horizontally on the concrete floor 6 at regular intervals, and the corners are arranged vertically and horizontally, and the computer, personal computer, and other office automation equipment are installed under the panel 5. The wiring space 8 is formed.

By the way, since the thickness of the flange 1 portion of the free access floor panel 5 is about 3 mm, the peripheral edges of adjacent panels 5 overlap each other as shown in FIG. Since it is necessary to remove all the panels 5 up to that portion when modifying this later, it is a difficult work.

For this reason, recently, in order to prevent the peripheral portions of adjacent panels 5 from overlapping with each other, the peripheral portion of the upper plate 4 is bent downward at a right angle as shown in FIG. However, bending the periphery of the upper plate 4 downward at a right angle in this way requires an extra material for the upper plate 4 by the bending margin, and also requires a bending process, thus increasing the number of processes.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a panel for a free access floor which does not require extra material and does not require a folding step, and a method of manufacturing the panel.

[0007]

A panel for a free access floor according to the present invention for solving the above-mentioned problems comprises a bottom plate having a flange on its peripheral edge and a large number of spherical convex parts on the upper surface of an inner concave part, and a flange. In a panel for a free access floor that is spot-welded to a flat top plate that has the same outer dimensions as the flange outer dimensions with spherical projections, on each side of the peripheral edge of the flange of the bottom plate, partly downward The present invention is characterized in that a plurality of overlapping prevention protrusions bent at a right angle are provided.

Further, according to the manufacturing method of the present invention for manufacturing the panel for the free access floor, the bottom plate material cut into a predetermined size is pressed to form U-shaped notches at the four corners at an angle of 45 degrees. Form a plurality of indented cuts on each side of the outer peripheral side, then press work to form a large number of spherical convex parts inside, and then press work to form the peripheral wall and flange on the outer peripheral side It is made into a concave shape, and then it is pressed to cut and form the outer peripheral edge of the flange to a predetermined size, and at the same time, the inside part of the notch of the above-mentioned shape is bent at a right angle downward to form an overlap prevention projection to form a bottom plate The bottom plate is spot-welded to a flat top plate having the same outer dimensions as the flange outer dimensions by the flange and the spherical convex portion.

[0009]

As described above, the free access floor panel of the present invention is provided with the overlap preventing projections which are partially bent downward at a right angle on the peripheral edge of the flange of the bottom plate. When the four corners of the panel are placed on the supporting legs arranged side by side and arranged vertically and horizontally,
The peripheral portions of adjacent free access floor panels do not overlap with each other and are flatly butted against each other.

Further, according to the method of manufacturing a panel for a free access floor of the present invention, when the bottom plate is finish-formed into a predetermined size, the material of the part to be cut is used to form the inner part of the ridge-shaped cut formed in the previous step. Is bent downward at a right angle to form an overlap prevention protrusion, so no extra material is required,
In addition, there is no need for a special step of forming the overlap prevention protrusion by bending, and the number of steps does not increase.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a free access floor panel and a method of manufacturing the same according to the present invention will be described with reference to the drawings. FIG. 1 shows a panel 10 for a free access floor according to the present invention. This panel 10 is provided with a flange 11 at its peripheral edge, a large number of spherical convex portions 13 inside an inner concave portion 12, and a transparent portion around it. A bottom plate 16 having holes 14 formed therein and partially bent on both sides of the peripheral edge of the flange 11 downward at a right angle and provided with overlap preventing projections 15 is formed on the flange 11 and the spherical convex portion 13. Then, it is spot-welded to a flat upper surface plate 17 having the same outer dimensions as the flange 11.

Next, a manufacturing method of the present invention for manufacturing the panel 10 for the free access floor having the above structure will be described.
As shown in FIG. 2, the rectangular bottom plate material 20 cut and formed into a predetermined size is pressed, and as shown in FIG.
Form the U-shaped notch 21 at an angle of
Forming a notch 23 on each side of each side 22 on the outer peripheral side. Next, this bottom plate material 20 was pressed to form a large number of spherical convex portions 13 inside as shown in FIG. Next, this bottom plate material 20 was pressed to form a peripheral wall 24 and a flange 11 on the outer peripheral side as shown in FIG. Next, the bottom plate material 20 is pressed to cut and form the outer peripheral edge of the flange 11 into a predetermined size as shown in FIG. The projection 15 is formed, and the through hole 14 is formed around the spherical convex portion 13 to form the bottom plate 16. Then, as shown in FIG. 7, the bottom plate 16 is replaced with a flat top plate 17 having a flange 11 and a spherical convex portion 13 and having the same outer dimensions as those of the flange 11.
And spot welding were performed to obtain a panel 10 for a free access floor shown in FIG.

As shown in FIG. 8, a panel 10 for a free access floor of this embodiment has four corners mounted on support legs 7 which are vertically and horizontally arranged on a concrete floor 6 with a predetermined space therebetween. The bottom plate 1 of the panel 10 when it is butt-mounted
Since the overlapping prevention protrusion 15 is provided on the peripheral edge of the flange 11 of No. 6, the overlapping prevention protrusion 15 does not ride on the adjacent panel 10, and therefore the adjacent panels 10 do not overlap each other and are flat. They are arranged in abutment with each other.

Further, as can be seen from the method of manufacturing the panel 10 for a free access floor of the above-mentioned embodiment, when the outer peripheral edge of the flange 11 of the bottom plate 16 of the panel 10 is cut and finish-molded to a predetermined size, a portion to be cut is formed. The bottom plate material 20 may be of the same size as the conventional one because the inner portion of the U-shaped notch 21 formed in the previous step is bent at a right angle downward to form the overlap preventing projection 15 using a material, and the extra material can be used. It is not necessary, and there is no need for a special step of forming the overlap prevention protrusion 15 by bending, so that the number of steps does not increase.

[0015]

As described above, the panel for a free access floor of the present invention is bent downward at a right angle partially at the peripheral edge of the flange of the bottom plate when the four corners are placed on the support legs and are arranged vertically and horizontally. Since the overlapping prevention protrusions are provided, adjacent free access floor panels do not overlap with each other, and are arranged so as to be flatly butted against each other. Therefore, time-consuming repair work is unnecessary.

Further, according to the method of manufacturing a panel for a free access floor of the present invention, when the bottom plate is finish-molded to have a predetermined size, the inner portion of the crenellated notch formed by using the material of the portion cut off in the previous step. Is bent downward at a right angle to form the overlap prevention protrusions, so that an extra material is not required as in the conventional case, and the step of specially forming the overlap prevention protrusions is unnecessary, and the number of steps is not increased. Good productivity.

[Brief description of drawings]

FIG. 1 is an elevation perspective view showing an embodiment of a free access floor panel of the present invention.

2 to 7 are views showing steps of a method of manufacturing a panel for a free access floor according to the present invention.

FIG. 8 is a view showing a state in which the free access floor panel of FIG. 1 is placed with its four corners mounted on support legs and butted vertically and horizontally.

FIG. 9 is a partially cutaway perspective view showing a conventional panel for a free access floor.

FIG. 10 is a view showing a state in which the free access floor panel of FIG. 9 is placed with its four corners mounted on a support leg and butted vertically and horizontally.

11 is a diagram showing a state in which the peripheral portions of the adjacent free access floor panels shown in FIG. 10 are overlapped with each other.

FIG. 12 is a cross-sectional view showing another conventional free access floor panel.

[Explanation of symbols]

 10 Free Access Floor Panel 11 Flange 12 Inner Recess 13 Spherical Convex 15 Overlapping Prevention Protrusion 16 Bottom Plate 17 Top Plate 20 Bottom Plate Material 21 U-Shaped Notch 22 Each Side 23 V-Shaped Notch 24 Peripheral Wall

Claims (2)

[Claims] 1. A bottom plate having a flange on the periphery and a large number of spherical convex portions on the upper surface of the inner concave portion, and the flange and the spherical convex portion are spotted on a flat upper surface plate having the same outer dimensions as the flange outer dimensions. In a welded free access floor panel, on each side of the peripheral edge of the bottom plate flange,
A panel for a free access floor, which is provided with a plurality of overlapping prevention protrusions which are partially bent at a right angle. 2. A bottom plate material cut into a predetermined size is pressed to form U-shaped cuts at 45 degrees at four corners, and at the same time, a plurality of U-shaped cuts are formed on each side of the outer circumference. Next, press working to form many spherical convex parts inside, then press working to form a peripheral wall and flange on the outer peripheral side to make a concave shape, and then press working to make the outer peripheral edge of the flange a predetermined size. Simultaneously with cutting and forming into a bottom plate, the inner part of the notch-shaped notch is bent at a right angle downward to form an overlap prevention projection to form a bottom plate, and then this bottom plate is formed into a flange and a spherical convex portion with the outer dimensions of the flange. A method for manufacturing a panel for a free access floor, which is characterized by spot welding to a flat upper surface plate having the same external dimensions.