JPH0978809A - Prefabricated floor slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to embody a floor capable of withstanding a large live load with a component material which is small-sized and light weight as much as possible and execute bolt turning work for the level adjustment of a main body panel from the top side. SOLUTION: A main body panel comprises a light weight foam metal and is rectangular-shaped in the plan while a reinforcing projected area 2 is integrally formed on the bottom. A wiring take-out notched part is formed respectively on the four sides while a through hole 4 is formed in the four corner areas in the vertical direction. When a large number of panels 1 are laid out side by side without a gap, there is provided a metal-made connecting plate 5, which is so large that it may be loaded over the bottom of the four cornered areas of each panel 1. Four holes, which are agreeable to adjacent four through holes 4 of the four main body panels 1 laid out close thereto, are formed on the connecting plate 5 when a nut member 6 is fixedly mounted thereon so that an adjusting bolt 7 may be screwed into the nut member 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure (generally called a free access floor) in which wiring of electronic equipment such as a computer is freely laid out and hidden under the floor.
The present invention relates to a prefabricated floor slab for installing on a building floor.

[0002]

2. Description of the Related Art A general free access floor is constructed as follows. A prefabricated floor slab is laid out like a tile on the concrete floor in the building. One floor slab consists of a square body panel of about 50 cm square. In order to install the main body panel with a gap of about several centimeters on the main body floor surface (concrete floor), a level adjustable leg structure is combined with the lower surface of the main body panel. The space between the building floor and the main body panel provides a wiring space in which layout can be freely performed. A small cable outlet is formed on the main body panel so that the cable routed under the panel can be pulled out indoors.

As a leg structure for supporting the main body panel, leg bolts are provided at the four corners of each panel, and the intersections of the four corners of four adjacent main body panels are integrally supported by one leg bolt. The structure is known. Regardless of the leg structure, put the pedestal on the lower surface of the main body panel,
The leg bolt is screwed into the nut member integrated with the pedestal from below. By changing the screwing amount of this leg bolt,
The length of the legs on the bottom surface of the panel can be finely adjusted appropriately. At the lower end of the leg bolt, a sole that comes into contact with the floor surface of the body is attached by a joint structure.

[0004]

In the conventional assembling floor slab, as described above, the pedestal integrated with the nut member is applied to the lower surface of the main body panel, and the leg bolt is screwed into the nut member from below. Lay the main body panel with the bottom sole in contact with the body floor surface. Then, the load of electronic devices such as computers and communication devices mounted on the main body panel is supported by the leg bolts.

In this leg structure, even if the leg bolts are screwed in the most and the leg lengths are made the shortest, the upper ends of the leg bolts are almost in contact with the lower surface of the main body panel.
Normally, the leg bolts will be installed with a slightly smaller amount of screwing in, so in order to increase the strength of this leg structure, increase the length of the nut member and increase the engagement length of the bolt and nut. Need to be large enough. However, if the engagement length of the bolts and nuts is increased, the leg length becomes unnecessarily long, and there is a problem that the distance between the body floor surface and the body panel becomes too large. Therefore, the engagement length of the bolt and nut cannot be so large.

Since the strength of the leg structure is not sufficient, the following problems further occur. On the free access floor with the conventional assembling floor slab, when a large heavy object such as a large cabinet or safe installed in the room collapses due to an earthquake,
The impact causes the leg structure under the main body panel to be broken or disengaged, causing the floor to collapse like the main body panel being depressed, resulting in a more violent collapse of furniture.

Further, the operation of screwing the leg bolts must be performed on the lower surface side of the main body panel, and the adjustment work is troublesome, so that there is a problem that it takes time to lay the prefabricated floor slab.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to realize a floor that can withstand a large load by using components that are as small and lightweight as possible.
Another object of the present invention is to provide a prefabricated floor slab capable of rotating bolts for adjusting the level of the main body panel from above the main body panel.

[0009]

In the assembled floor slab of the present invention, the main body panel is made of lightweight foam metal, has a substantially rectangular planar shape, and a reinforcing convex portion is integrally formed on the lower surface, and the center of the four sides is formed. Notches for taking out the wiring are formed in the respective portions, and through holes penetrating vertically are formed in the four corners. In addition, when a large number of the main body panels are arranged side by side without a gap, at the intersection of the four main body panels adjacent to each other, the metal body is sized to be hung on the lower surfaces of the four corners of the four main body panels. There is a connecting plate. Further, the connection plate is formed with four holes that match the four adjacent through holes of the four main body panels that are adjacently arranged, and the nut member is concentric with each of the holes. Adjustment bolts that are respectively fixed to the lower surface of the plate and that are vertically screwed into the nut member are inserted into the through holes. Further, the upper ends of the adjusting bolts are accommodated in the through holes, the upper ends thereof have hexagonal holes for rotating operation, and the lower ends of the four adjusting bolts attached to the one connecting plate are the building floors. It contacts one sole plate placed on the surface.

[0010]

1 and 2 show the construction of a prefabricated floor slab according to an embodiment of the present invention. The main body panel 1 is made of lightweight foam metal such as aluminum die-cast, and has a plane shape of a square with a side of about 50 cm as shown in FIG. Reinforcing protrusions 2 are integrally formed on the lower surface of the main body panel 1 in a grid pattern. Also,
An appropriate number of notches 3 for taking out the wiring are formed in the central portions of the four sides of the main body panel 1, respectively. Further, through holes 4 are formed at the four corners of the main body panel 1 so as to vertically pass therethrough.

Further, when a large number of main body panels 1 are lined up without a gap and laid out like tiles, they are adjacent to each other.
At the intersections of the main body panels 1, there are metal connecting plates 5 sized so as to be stretched over the lower surfaces of the four corners of the four main body panels 1. The connecting plate 5 is formed with four holes 5a corresponding to the four adjacent through holes 4 of the adjacent four body panels 1, and the nut member 6 is concentric with each of the holes 5a. Are fixed to the lower surface of the connecting plate, respectively. The connecting plate 5 is not a simple flat plate, but has convex ribs formed in an appropriate pattern to enhance the strength.

Adjustment bolts 7 are vertically screwed into four nut members 6 fixed to one connecting plate 5 in a predetermined arrangement. When the connecting plate 5, to which the nut member 6 is fixed and the adjusting bolt 7 is screwed, is applied to the regular position on the lower surface of the main body panel 1, the mounting portion of the nut member 6 is inserted into the through hole 4 of the main body panel 1. Adjusting bolt 7 fitted and protruding from the nut member 6
The upper end portion of is inserted into the through hole 4. Further, a hexagonal hole 7a for rotating operation is provided at the upper end of the adjusting bolt 7, and a hexagonal wrench can be inserted into the through hole 4 from the upper surface side of the main body panel 1 to rotate the adjusting bolt 7 in the hole 4. .

The lower ends of the four adjusting bolts 7 mounted on the single connecting plate 5 are in contact with the single sole plate 9 mounted on the body floor surface 8. The sole plate 9 is formed by pressing a metal plate similar to the connecting plate 5, and is formed with a recess for receiving the lower ends of the four adjusting bolts 7 so as not to be displaced. The through hole 4 of the main body panel 1 is closed by a disc lid 10 made of a metal plate so that the upper surface of the panel 1 is flush.

The assembling floor slab constructed as described above is arranged such that the cables are laid out on the body floor surface 8 in a predetermined layout while the sole plates 9 are not trampled, and the sole plate is not trampled. 9. The assembly parts of the connecting plate 5 with the four adjusting bolts 7 and the nut members are arranged on the body floor surface 8 in a predetermined arrangement. And four connecting plates 5 in which the four corners of one body panel 1 are appropriately arranged
Mounted on each of them (the connection plate 5 is placed while finely adjusting the position of the assembly parts around the connection plate 5), the main body panel 1 is pressed from above, and the nut member is attached to the lower portion of the through hole 4. Fit the attachment part of 6. At this time, the protruding lengths of the adjusting bolts 7 are made uniform by pre-adjustment, but it is difficult to spread the many main body panels 1 on the assembled parts of the many connecting plates 5 without any steps. Therefore, while laying a certain number of main body panels 1, the adjustment bolt 7 is rotated at a necessary position so that the upper surface of each panel 1 is horizontal without any step and the amount of screwing is adjusted. This bolt operation can of course be easily performed from the upper surface side of the panel 1. That is, the disc lid 10 may be removed (it may not be attached from the beginning), and the bolt 7 visible inside the through hole 4 may be rotated with a hexagon wrench. Further, while laying out the main body panel 1, the cables below the panel were taken out upward from the cutout portion 3 at a required location, and the cables were passed through the cutout portion 10a into the hole formed by the cutout portion 3 of the adjacent panel 1. State.

[0015]

In the prefabricated floor slab of the present invention, the adjacent four
One connecting plate is applied to the lower surface of the intersecting portion of the one body panel, and the load on the panel is supported by the four adjusting bolts and the sole plate mounted on the connecting plate. Since the upper end of each adjustment bolt is inserted into the through hole of the main body panel, the engagement length of the bolts and nuts can be large even if the overall height is limited, and the bottom surface of the main body panel is used for reinforcement. A convex portion is also formed. Therefore, the strength of the leg structure is increased, the maximum load capacity can be made considerably larger than that of the conventional structure, and even if the furniture on the floor falls due to an earthquake or the like and the big impact is applied, the main panel collapses greatly. It doesn't happen.

Further, since the adjusting bolt can be rotated from above the main body panel, the level adjustment work of the main body panel becomes extremely simple.

[Brief description of drawings]

FIG. 1 is a plan view showing the structure of an assembling floor slab according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the assembling floor slab of the same.

[Explanation of symbols]

 1 Body Panel 2 Reinforced Convex 3 Wiring Extraction Notch 4 Through Hole 5 Connecting Plate 5a Hole 6 Nut Member 7 Adjustment Bolt 7a Hexagonal Hole 8 Body Floor 9 Sole Plate 10 Disc Cover

Claims (1)

[Claims] 1. A prefabricated floor slab having the following requirements. The main body panel is made of lightweight foamed metal, and its planar shape is almost rectangular.The lower surface is integrally formed with reinforcing protrusions, the central portions of the four sides have cutouts for wiring, and the four corners have Through-holes are formed so as to penetrate vertically. When a large number of the main body panels are arranged side by side without a gap, a metal connecting plate of a size hung over the lower surfaces of the four corners of the four main body panels at the intersections of the four adjacent main body panels. There is. The connecting plate is formed with four holes that match the four adjacent through holes of the four body panels that are arranged adjacent to each other, and a nut member is concentric with each of the holes, and a nut member is formed on the lower surface of the connecting plate. The adjusting bolts, which are fixed to the nut member and are vertically screwed into the nut member, are inserted into the through holes. The upper end of the adjusting bolt is contained in the through hole, and the upper end of the adjusting bolt has a hexagonal hole for rotation operation. The lower ends of the four adjusting bolts mounted on the one connecting plate are on the body floor surface. A sole plate placed on the.