JPH02190560A - Free-access floor board of steel plate - Google Patents

Abstract

PURPOSE:To obtain a lightweight floor board with high strength by filling foaming resin dispersed cement, into which foaming resin beads are dispersed, in the inside space of the floor board, and providing fitting grooves to fit bearing legs in receiving plate peripheral ribs to four corners of a rear plate. CONSTITUTION:A pyramid-like hollow is provided at the center of the rear plate 2 of steel plate and, at the same time, hook-like throttle sections 13 in the shape of three overlapped hemispheres are formed at four corners, and a large number of hemispherical throttle sections 14 are formed in a remaining part After that, the foaming resin dispersed cement 4, into which foaming resin beads 5 are dispersed, is filled in the inside space of a floor board consisting of the front plate 1 of steel plate and the rear plate 2 of steel plate. Fitting grooves 3 to fit receiving plate peripheral ribs 11 of bearing legs 10 are formed at corners of the rear plate 2, and the floor board is spread all over the receiving plate of the bearing legs 10 to fit and fix to the peripheral ribs 11. According to the constitution, the floor board can be easily manufactured by lightweight and high rigid press-working and, at the time, it can be easily spread all over the receiving plate.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a method for constructing a free access floor in a room equipped with various types of equipment such as OA equipment and computers by laying a plurality of sheets formed into a predetermined shape. This relates to floorboards.

<Prior Art> Free access floorboards are made of aluminum or aluminum alloy, steel, inorganic material such as concrete, synthetic resin, wood, etc. These are formed into a rectangular shape and are laid directly on the floor or supported at a predetermined height by a support stand b).

This is the so-called free access floor, and heavy items such as computers, surrounding root zones, and other OA equipment are often installed above it.
It is desirable that a room equipped with such a raised floor be kept at a predetermined temperature for equipment management purposes, and that the noise of workers walking and the noise generated from the equipment be suppressed as much as possible.

<Problems to be Solved by the Invention> ■When a free access floorboard is supported by support legs, the corner portions of the four floorboards are usually gathered and supported on the upper support plate of the support leg. In the case of aluminum free access floor boards, there have conventionally been cases in which a fitting recess into which the protrusion of the receiving plate fits is formed during processing. On the other hand, in the case of free access floorboards made of steel plates, through holes are provided at the four corners of the back plate of the floorboard, and protrusions provided on the receiving plates of the support legs are fitted into these holes for positioning and interconnection of the floorboards.

In other words, when fitting the protrusions provided on the support legs into the four corner holes of the floorboard, in order to provide the protrusions on the support legs, should the support legs be made of aluminum die-casting, or should a separate part be attached if they are made of steel? Alternatively, complicated press processing is required, resulting in increased costs on the support leg side. There was also a problem with the strength of the protrusions (protrusions with sufficient strength would significantly increase material costs, etc.). Therefore, there were problems such as time-consuming fitting and complicated support legs, which had to be solved.

■Also. Among conventional free access floorboards, those made of aluminum or steel plates are made hollow between the front and back panels to reduce weight, or synthetic resin tiles or carpets are placed above the front panel in hopes of providing some degree of sound insulation and heat insulation. Although it is attached,
These have not been proactive solutions, and there have been fixed points such as the need to use a considerable weight per unit area in order to obtain a predetermined flexural strength. Concrete-1-
Inorganic panels, such as those made from inorganic materials, have excellent fire resistance and are inexpensive, but they are generally weak against impact, so they are not suitable for large floorboards, and they are also heavy and difficult to install and layout, making them an important asset for buildings. Undesirable.

Furthermore, there is a drawback that dust and chips occur. On the other hand, synthetic tree Fo
'R and wooden ones have the advantage of being cheap and light, but they have poor fire resistance and can easily catch fire. In addition, because of its low strength, it has the disadvantage that it is limited to use as a floorboard or on small floorboards. There have also been attempts to fill the interior with CI (carbon fiber reinforced cement 1) or G RC (glass fiber reinforced cement), but the shrinkage strain is large and the I have a problem.

For these reasons, steel raised floor boards are attracting attention because of their high strength, high rigidity, ease of manufacture through press working, and low cost. It is thought that it will be excellent in non-1:
As proposed in No. 7.

A system in which the inside of a steel raised floor board is filled with inorganic hollow particles such as shirasu balloons has been proposed, but there was a need for improvement due to the labor-intensive nature of the materials, cost, and ease of manufacturing.

Means for Solving the Problems> Therefore, the inventors of the present invention have conducted various studies on free access floor boards made of steel plates in order to solve the above-mentioned ms. The back plate (2) of the floor plate consists of ribs (11) around the receiving plate of the support legs (10) at the four corners.
We have developed a new structure in which a fitting groove (3) is formed.

The shape of the fitting groove (3) herein is not particularly limited as long as it corresponds to the shape of the receiving plate peripheral rib (11). The groove may be continuous or discontinuous over the entire groove.

In addition, for the above question (a), consider a solution other than inorganic hollow particles! Foamed resin beads (5
) was solved by creating a structure filled with foamed resin-dispersed cement I-(4) in which the particles were dispersed.

Examples of the foamed resin beads mentioned here include foamed polyethylene, foamed polyurethane, foamed polystyrene, etc., and foamed polystyrene is a particularly preferred example because it has high bead strength, can be easily mass-produced, and is inexpensive. The particle size is preferably 1 to 5 mm. The foamed resin beads are solidified by adding cement, aggregate, admixtures, and other additives.

In order to make the cement (4) in which such foamed resin beads are dispersed exist in the internal space of the floorboard, the steel plate front plate (1) and the steel plate i back plate (2), which have been formed into a predetermined shape, are required to exist in the internal space of the floorboard.
) is formed into a predetermined shape by injecting slurry-like cement containing foamed resin beads into the internal space formed by combining the two and solidifying the foamed resin beads, or by molding or cutting the foamed resin dispersed cement h (4). The plate is inserted by inserting the steel plate front plate (1) and the steel back plate (2) when they are combined.

Effect〉 As mentioned above, the back plate of the steel free access floor plate (2
) When the fitting grooves (3) are provided at the corners, the floor plate can be simply laid on the support plate of the support legs (10) and the peripheral ribs (11
) A [fixed and positioned, and
Unlike in the case of flowering, the grooves are made of a continuous steel plate and are shaped like concave and convex ridges, so that a reinforcing effect similar to that of reinforcing ribs can be obtained.

When using the free access floor board of the present invention, the supporting legs only need to form ribs on the outer periphery of the circular board (or square board, etc.).
It is easy to manufacture and inexpensive. Its strength can also be easily increased. As described above, the fitting of the floor plate onto the support leg is also easier than the conventional fitting of a protrusion and a hole.

In addition, the structure in which the internal space of the floorboard is filled with foamed resin-dispersed cement 1-(4) in which foamed resin beads (5) are dispersed maintains the rigidity required for a raised steel floorboard.
The overall structure is lightweight, and it also provides sound insulation and heat insulation.

<Example> Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a bottom view of a steel free access floor plate according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line B--
B is an enlarged sectional view. FIG. 4 is a plan view of the main part showing the steel free access floor plate of the present invention placed on the receiving plate of the support leg. No. 51!1 is a partially cutaway side view of the same.

In the first embodiment of the steel free access floor board of the present invention, the steel front plate (1) and the steel back plate (2) are formed in advance and then combined, fl! The plate surface plate (1) is a flat rectangular plate. The back plate (2) of the steel plate is formed by applying a special press to the steel plate.

In addition to leaving the periphery and providing a step inside, a large truncated pyramid-shaped depression is provided in the center, and three hook-shaped depressions are provided at the four corners.
An angular embossed part (13) in the shape of overlapping hemispheres is formed, and the remaining part is formed with a large number of hemispherical apertures (14) (in this example, 20 hemispheres are overlapped). ).

In these shapes, the truncated pyramidal constricted portion (15) in the center is used for attaching an outlet, and the constricted portions in other portions are for adding strength.

In addition, the hemispherical aperture part (14) has a truncated hemispherical shape.

The truncated pyramidal aperture part (15) at the center may also be prismatic or truncated conical, but it requires at least a space for attaching an outlet. Therefore, it is necessary to make it 1.0 mm higher than the surrounding hemispherical constriction part (14). In this embodiment, the size is approximately the same as the combined area of the four hemispherical apertures (14). Further, the position of 7 is not limited to the center, but may be at a corner.

An outlet is attached to this part by drilling a hole, etc.

In other words, the aperture shape of the back plate is one large-area electrical outlet I.
A truncated conical constriction part (15) as a mounting constriction part and a large number of hemispherical constriction parts (14) are arranged in the remaining part.

By doing this, it has the necessary strength as a floorboard, has 1 outlet for 1 outlet, has a filling space for filling material inside, and has an excellent aesthetic appearance. be able to.

Next, on the peripheral edge of the floorboard, there are peripheral notches (1
6) is provided. This peripheral notch (16) is for passing the wiring cord, depending on the case.

It is also possible to add an outlet or the like. Also.

By matching with the peripheral notch (16) of the adjacent floor plate, it is possible to obtain twice the opening size without increasing the strength. The position of this notch is not limited to two corresponding sides, and may be one or more.

Corner slits I-(17) are provided at the four corners of the back plate from the bottom to the front plate, and these are used to fill the internal space formed by the front plate and the back plate with a filler. The back plate also serves as an air vent when
The holes (18) at the four corners serve as air vents and injection ports when filling the filling material, and caps are fitted after filling.

Steel plate back plate of such steel plate raised floor plate (
Fitting grooves (3) are formed at the four corners of 2). In this example, the fitting groove portion (3) is provided as an arcuate groove. As shown in FIGS. 4 and 5, the steel raised floor plate of the present invention is &! An upwardly facing rib (1
1), and the fitting groove (3) fits into this rib (11).

The internal space of the floorboard consisting of the steel plate surface plate (1) and the steel plate W11A face plate (2) is filled with foamed resin-dispersed cement 1 to (4) in which foamed resin beads (5) are dispersed. Table 1 shows an example of the raw materials and blending ratios of resin-decomposed cement 1-(4).

In this example, a front plate made of FF4 plate (1) and a back plate made of steel plate (2) are combined in advance, and a slurry with foamed resin beads (5) dispersed inside is poured into the space formed inside. However, on the contrary, four parts of the steel back plate (2) before the steel plate front plate (1) were combined with the above-mentioned foamed resin dispersion cement (4). It is also possible to fill the cement slurry liquid in which foamed vIJ fat beads (5) are dispersed inside as shown in the formulation example, solidify this to form a foamed resin-dispersed cement board, and then combine it with the steel plate surface board (1). can.

Solidification will be completed within a day or night! do.

Effects of the Invention> Although the steel plate free access floor plate of the present invention detailed above is made of steel plate, it is different from other aluminum I! It can be easily laid on support legs like free access floorboards such as. Also, it has excellent insulation properties.

1I5i and high strength.

[Brief explanation of the drawing]

FIG. 1 is a bottom view of the steel free access floor plate on the mainstream side of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A in FIG. FIG. 3 is an enlarged sectional view taken along the line Is-Is. Figure 4 shows the steel free access floor plate f& of the present invention on the support plate of the support leg.
Looks like I posted it! FIG. FIG. 5 is a partially cutaway side view of the same. (1) Surface plate made of fi4 plate (2) Back plate made of steel plate (3) Fitting groove (4) Foamed resin dispersed cement 1-(
5) Foam @fat beads (10) Support legs (11) Ribs
(12) Receiving plate (13) Hook-shaped drawing part (1
4) Hemispherical aperture part (15) truncated pyramidal aperture part (1G) peripheral notch part (17) corner slit or more

Claims (1)

[Claims] 1. The support plate peripheral ribs (11) of the support legs (10) fit into the four corners of the back plate (2) of a floor plate consisting of a steel plate front plate (1) and a steel plate back plate (2). A free access floor plate made of a steel plate characterized by forming a fitting groove (3). 2.The internal space of the floorboard consisting of a steel front plate (1) and a steel back plate (2) is filled with foamed resin dispersed cement (4) in which foamed resin beads (5) are dispersed. Free access floor plate made of steel plate.