Free access floor panel

Claim 2

A free access floor panel comprising a top plate and a bottom plate which is provided with an upright wall along its peripheral edge, said bottom plate and top plate being made of flat steel plates and connected to each other at the peripheral edges thereof to form a quadrate floor panel, and said floor panel is characterized in that either said top plate or bottom plate is divided along a diagonal line into two triangular pieces, and a remaining plate in a quadrate shape functions as a hinge so that the entire quadrate floor panel conforms with any regularities of a base on which said floor on which said floor panel is installed.

Claim 3

A free access floor panel comprising a quadrate top plate and a quadrate bottom plate wherein one of said plates is divided along a diagonal line, said top plate and said bottom plate being made of steel sheets formed into specified shapes by press forming, in which a peripheral surface of the free access floor panel is formed by upright walls provided on either the quadrate top plate or the quadrate bottom plate, the top plate and bottom plate are integrated into a single body by crimping an entire periphery of a respective one of either said top or bottom plates to an entire periphery of said upright walls, and props are provided inside of said upright walls and between said top and bottom plates, said props being in contact with either one of said bottom or top plates.

Claim 4

A free access floor panel comprising a quadrate top plate and a quadrate bottom plate wherein one of said plates is divided along a diagonal line, said top plate and said bottom plate being made of steel sheets formed into specified shapes by press forming, in which a peripheral surface of the free access floor panel is formed by upright walls provided on either the quadrate top plate or the quadrate bottom plate, the top plate and bottom plate are integrated into a single body by crimping an entire periphery of a respective one of either said top or bottom plates to an entire periphery of said upright walls, and props are provided inside of said upright walls and between said top and bottom plates, said props being in contact with either one of said bottom or top plates.

Claim 5

A free access floor panel according to claim 2, wherein said top plate is divided into two pieces along said diagonal line, and the divided edge portions thus formed are bent so that the edges are in touch with or in a vicinity with said bottom plate, said divided edges thus forming diagonal ribs which are integral with said top plate.

Claim 6

A free access floor panel according to claim 2, wherein said top plate is divided into two pieces along said diagonal line, and diagonal ribs which are formed by cutting sections of said bottom plate and bent upright are brought in a vicinity to said top plate.

Claim 7

A free access floor panel according to claim 2, wherein said top plate is divided into two pieces along said diagonal line, and divided pieces thus formed are connected to each other by a channel of steel which functions as diagonal rib.

Claim 8

A free access floor panel according to claim 2, wherein said bottom plate is divided into two pieces along said diagonal line, and divided edges thus formed are bent at substantially right angles to form diagonal ribs so that said ribs are in touch with or in a vicinity of said quadrate top plate.

Claim 9

A free access floor panel according to claim 2, wherein peripheral edges of said top plate and said bottom plate are crimped so that said plates are integrated.

Claim 10

A free access floor panel according to claim 2, wherein a filling of non-organic material is filled into a space between said top plate and bottom plate.