JPS6355256A - Floor panel - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a floor panel that is laid above a reference floor surface to form a double floor.

(Prior art) A double floor to ensure free space below the floor for use in laying cables, etc. usually consists of a plurality of floor panels supported by support legs placed adjacent to each other on a standard floor surface. It is composed of

Conventionally, such floor panels have been used, such as those made of die-cast aluminum with lattice-shaped reinforcing ribs integrally molded, those made of GRC, and those made of particle board.

Examples include those in which a pressed steel plate back plate is press-formed to form lattice-like ribs, and this is spot welded to a pressed steel plate front plate, and particle board or reinforced cement board is sandwiched between steel plates. be.

(Problems to be Solved by the Invention) However, among the above-mentioned conventional floor panels, aluminum die-cast floor panels have the following problems.

The production cost is high, and forming reinforcing ribs increases the panel thickness, which not only makes it difficult to lower the finished height of the double floor to a sufficiently low level, but also has the drawbacks of loud running noise.

In addition, a floor panel made of GRC has the disadvantage that a portion of the corner thereof is easily destroyed because the glass fibers are not sufficiently distributed around the peripheral edge of the panel.

Floor panels made of particle board have the disadvantage that the panel must be fairly thick in order to obtain sufficient strength.

In addition, floor panels made of pressed steel plates have the drawbacks of being easily bent, not having sufficient strength, and producing walking noise.And what about particle boards or reinforced cement boards? The floor panel is made of sand-inched copper plates.

It tends to be heavy, and the floor construction is not easy.
-a. It also has the disadvantage of high manufacturing cost.

Apart from floor panels installed in computer rooms where heavy objects such as large computers are installed, floor panels used in offices of general office buildings are required to have the following characteristics. Ru.

First, since it is used as a floor in a general office, heavy floor panels used in computer rooms, machine rooms, etc. are of excessive quality and are not economical for widespread use.

In addition, since it is installed in a general office, there are many cases where the indoor height is not sufficient or it must be installed on the existing floor, so the total thickness of the floor panel must be as thin as possible. be.

Furthermore, since equipment is frequently introduced and moved, it must be lightweight and easy to remove and install.

Also, the load-bearing performance is at least 3 [] OKg/yr? Must be on μ.

When floor panels are installed in a general office, the partitions will be installed upright on the floor panels, so noise from one side of the partition will be transmitted through the underfloor space to the other side. At least 35 dB (500 Hz
Sound insulation performance of the same level as transmission loss is required.

Therefore, one purpose of the present invention is to provide lightweight floor construction with excellent floor construction properties.
To provide a floor panel that has a large sound insulation effect, has sufficient strength even when the panel thickness is reduced, is easy to manufacture, and can keep manufacturing costs low.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the floor panel of the present invention has the following structure l1i2. That is, in a floor panel formed by joining a front plate made of a steel plate and a back plate made of a steel plate to each other at least at their edges, the back plate has an annular rib protruding in a direction opposite to the front plate in the center part. A peripheral rib is formed along the curved portion of the back surface, protruding in the same direction as the four-shaped rib, and extending so as to surround the annular rib. A reinforcing rib is formed on the back plate, and extends in the direction of the support leg engaging portion of the floor panel.

A flat part is formed on the outside of the peripheral rib of the back plate, and extends along the edge of the back plate and contacts the front plate in a band-like manner, and the flat part is formed between the front plate and the back plate. It is characterized by sealing the space with an inorganic seismic filler.

(action, effect) The floor panel of the present invention has such a configuration.

A space is formed between a front plate made of a thin steel plate and a back plate, and a plurality of ribs formed on the back plate.

These spaces are sealed with an inorganic filler made of mortar mixed with perlite, making the floor lightweight and easy to install.

In addition, the inorganic filler sealed in the space between the front plate and the back plate covers the entire panel area, including the corners where multiple ribs converge and the reinforcing effect is weakened. By filling and unifying the front and back surfaces, the shearing force against the load on the floor panel increases, and sufficiently high strength can be obtained, with little deflection.

Furthermore, there are only a few areas where the front plate and the back plate are directly connected, and there are only a few areas where the panel thickness is extremely thin, and most areas are in indirect contact via an inorganic filler. , it is possible to obtain the required sound insulation performance.

In addition, there are annular ribs on the center and edges, which have a large amount of deflection when a load is applied to the floor panel.

Since a peripheral rib is formed and both of these ribs are connected by a reinforcing rib extending toward the supporting leg engaging portion of the floor panel, the central portion of the floor panel and the adjacent supporting leg engaging portion are connected. The load applied to the edges between the floor panels is effectively distributed and supported by the plurality of support legs of the floor panel. That is,
The annular ribs, peripheral ribs, and reinforcing ribs of the floor panel connect multiple support legs attached to the floor panel to form a beam structure, so together with the presence of the inorganic filler, the strength of the floor panel increases. will improve dramatically.

Also, the ribs that protrude from the back side of the floor panel.

This is because it is composed of an annular rib provided at the center, a peripheral rib extending along the rim, and a reinforcing rib that connects both of these ribs and extends toward the support leg engaging portion.

It becomes possible to effectively improve the strength of the floor panel in a minimum space. A wide recess can be formed in the part where the rib is not formed, and it is possible to cross the underfloor wiring in this recess, and it is also possible to form an opening in this recess and install various types of equipment. Therefore, even if the floor panel is installed at a low position on the reference floor surface, the function of the floor panel will not be impaired.

Also, since the front and back plates of the Fucoa panel of the present invention are made of steel plates, they are easy to process.

Since the annular rib, the peripheral rib, and the reinforcing rib are connected to each other to form a continuous space, the inorganic filler can be easily injected and evenly distributed. Therefore, production of the floor panel is easy and production costs can be kept low.

(Implementation column) Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

The floor panel 1 is made of inorganic cement-based mortar, which is formed by integrally joining a front plate 2 made of pressed steel plate and a back plate 6 made of pressed steel plate, and made of mortar mixed with granular pearlite in the space between each drawing plate 2.6. It is constructed by sealing the filling material 4.

The surface plate 2 has a rectangular shape as a whole, and has quarter-shaped shoulders 2a and quarter-shaped notches 2 at its four corners.

An annular rib 3a is formed on the back plate B by press drawing.
, peripheral rib 64. A reinforcing rib 6c is formed to protrude.

The annular rib 64 is provided at the center of the back plate 6, and a circular central recess 6d is formed in the area surrounded by the annular rib 6a. Intersecting ribs 6d' intersecting each other in a cross shape are protrudingly formed within the central recess 6d, and arcuate flat portions 6e that abut against the surface plate 2 are formed at portions sandwiched between the intersecting ribs 3d'.

The peripheral rib 6b extends along the edge of the floor panel 1,
It surrounds the annular rib 6a. A filling hole 6f is provided in the peripheral rib 6k.
An air vent hole 6g is formed, and a filling hole 6f is formed in the cap 5.
covered with Sleeves 8 for press-fitting support legs are fitted and fixed to the four corners of the peripheral rib 66, and these sleeves 6 have sleeves 8 to which support legs 7 are screwed.
is press-fitted. The support leg 7 is composed of a bolt rod,
Also.

The sleeve 8 is provided with a flange 8a. In addition.

In the figure, 6h is a reinforcing support 111! This is a small recess into which an IT (not shown) is fitted.

The reinforcing ribs 6c extend in the diagonal direction of the floor panel 1,
The annular rib 6Q and the peripheral rib 6b are connected. Reinforcement rib 6
c needs to extend at least in the direction of the support leg 7.

Annular rib 6a and opening rib 6! ) and the reinforcing ribs 6c, a recess 61 with an arcuate edge is formed. Two conical recesses 6j are formed within the recess 31 (see II in FIG. 4), and the tops 6k of the conical recesses 6j abut against the surface plate 2.

On the outside of the peripheral rib 6, there is a flat g(
S31 is formed.

And this flatness? A packing mounting groove 6m is formed on the outside of A31 by bending the back plate 6 in the opposite direction of the front plate 2. In FIG. 5, numeral 9 indicates a gasket fitted into this gasket mounting groove 6m.

The four corners of the back plate 6 have shapes that match the shoulders 2a and notches 26 of the first front plate 2, and when laying the floor panel, the presser member 10 is held at the N part 2Q as shown in FIG. The floor panel 1 can be fixed by engaging the bolt 11 with the nut holder 12 and screwing the bolt 11 into the nut holder 12. Third
In the figure, reference numeral 16 denotes a mounting plate that is fixed to the reference floor surface 14 and supports the support legs 7 of the floor panel 1.

To manufacture the floor panel 1 described above, 1 the front plate 2 and the back plate 6 are press-drawn and formed, 1 they are brought into contact with each other, and the flat parts 3e and 31 are spot welded at appropriate intervals. The tops 6k of the two conical recesses 6j are spot welded to integrate the first front plate 2 and the back plate 6. Next, the floor panel 1 is tilted so that the air vent hole 6g is slightly upward, and after the cap 5 is removed, an inorganic filler 4 made of mortar mixed with pearlite is press-fitted through the filling hole 6f. Completion of filling may be hindered by the filling material 4 flowing out from the air vent hole 6g.

When filling is completed, the camp 5 is fitted and the filling material 4 is produced.

FIG. 7 shows the flow of stress within the ribs when a concentrated load is applied to the center of the floor panel 1 or the center of the sides of the floor panel 1. As is clear from the figure, the ribs 3a, 34
．． 3(!) is combined with the support leg 7 to construct a beam that supports the load, so the strength of the floor panel 1 is greatly increased.

(Experimental Row 1) Figure 8 shows the load-deflection curves for one variety of floor panels. In the figure, A is the panel of the present invention, B to G are commercially available conventional panels, and A to G are the results when a concentrated load was applied to the center of each floor panel with a 50φ pressure plate, respectively. FIG.

A... Floor panel dimensions of the present invention: 500 x 500 x 27 Weight: 35 Kg/m'' Surface plate: Pressed steel plate with a thickness of 1.6 mm Back plate: Pressed steel plate with a thickness of 1.2 tram B... Carbon Floor panel dimensions: 600 x 600 x 24 m weight: 41.7 KLi/m" C...Floor panel dimensions: 500 x 500 x 2 am weight: 28.4 Kg/m"・Floor panel made by laminating two sheets of highly compressed particle board together.Dimensions: 450x450x64m.Weight: 31. IK9/E...Pressed steel floor panel dimensions: 600x600x27■ Weight: 22.2Kg/m F...GRC floor panel dimensions: 500x500x20 Weight: 44.0KLi/G...Aluminum die-cast Floor panel dimensions: 50
0x5C] 0x54 Weight: 21.2Kg/m" As is clear from the figure, the floor panel of the present invention has a deflection of 1.5 or less for a load of 600 to 9. This target I could be sufficiently achieved. Further, this deflection occurred only near the central recess 6d, and hardly occurred around it.

Looking at the load-deflection curve and gland in Figure 8, 1. The diagram A of the floor panel of the present invention is the diagram E of the floor panel made of pressed steel plate.
and GRCg floor panel F have a curve approximately proportional to l. In other words, the floor panel of the present invention has a strength higher than that of a GRCd floor panel up to its elastic limit, and even when exposed to more than that limit, it does not immediately break and lose its strength like a GRC floor panel, but has the viscoelasticity of a steel plate. Its strength can be maintained.

(Experiment Row 2) Figure 89 is a diagram showing the results of a sound insulation performance test of the floor panel of the present invention. This diagram is based on test method B52750.
Based on Sound Insulation Variation Geke B55821.

Regarding sound insulation for the first shift, there are no standards for double floors, but
Since it is related to the AT to the next room, it is thought that the same level of sound insulation as a normal partition is required.

According to Ndopunku, a noise countermeasure compiled by the Nihon Hikyo Materials Association, the standard sound insulation level for office partitions is 35 dB (500 Hz).
transmission loss). Furthermore, according to the ISO international standard (draft), the degree of sound insulation between adjacent dwelling units (boundary walls) is 51 (ISO sound insulation degree). but.

In the case of a double floor, sound is insulated twice: when it passes into the floor and when it passes from under the floor to the next room.

Furthermore, since there is also a transmission loss in the underfloor space, it is thought that the same sound insulation effect can be achieved with one sound insulation shift that is less than half the amount of one normal partition. Therefore, it is sufficient to aim for a sound insulation degree of 20 to 25 according to the ISO standard (same as the BS standard).

As is clear from FIG. 9, the results of the sound insulation performance test of the floor panel of the present invention are at a satisfactory level, exceeding the standard sound insulation degree for office partitions.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the floor panel of the present invention. Figure 2 is a bottom view of the floor panel in Figure 1, Figure 3 is
FIG. 2 is a cross-sectional view taken along line l-1 in FIG. 2; FIG. 4 is a partially cutaway perspective view of the floor panel of FIG. 1. FIG. 5 is a perspective view of one embodiment of the support leg. FIG. 3 is a perspective view of the main parts showing the floor panel installation state. FIG. 7 is a sectional view showing the relationship between the ribs and support legs of the floor panel of the present invention. FIG. 8 is a load-deflection diagram of the floor panel. FIG. 9 is a diagram showing the sound insulation effect of the floor panel of the present invention. 1...Floor panel. 2...Surface plate. 3...Back board. 4...Filling material. 6G...Annular rib. 66...Peripheral rib. 6c...Other strong ribs. Figure 2 Figure 7 Figure 8 Deflection (mm)

Claims (4)

[Claims] (1) In a floor panel formed by joining a front plate made of a steel plate and a back plate made of a steel plate to each other at least at their edges, an annular rib projects in the center of the back plate in a direction opposite to the front plate. a peripheral rib that protrudes in the same direction as the annular rib and extends so as to surround the annular rib is formed along the edge of the back plate, and the annular rib and the peripheral rib are A reinforcing rib is formed on the back plate and extends in the direction of the supporting leg engaging portion of the floor panel, and a reinforcing rib is formed on the back plate and extends along the edge of the back plate on the outside of the peripheral rib of the back plate. 1. A floor panel characterized in that a flat part is formed in a band shape and contacts the front plate, and an inorganic filler is sealed in a space between the front plate and the back plate. (2) A packing mounting groove extending along the edge of the floor panel is formed between the outer side of the flat part of the back plate and the front plate. floor panel. (3) The peripheral edge of the recess surrounded by the annular rib, the peripheral rib, and the reinforcing rib of the back plate is formed into an arc shape, and a plurality of conical recesses that contact the front plate are provided in the recess. 2. The floor panel according to claim 1, wherein the back plate and the front plate are spot welded in the conical recess. (4) The floor panel according to claim 1 or 3, wherein the front plate and the back plate are spot-welded at appropriate intervals along the flat portion of the back plate.