JPH01315551A - Free access floor plate - Google Patents

Abstract

PURPOSE:To prevent rattling of a square panel by providing flexibility properly along one of the diagonal lines of the panel which is transformed along the groove of the floor surface when the panel is placed on the under floor ground of an inferior flatness. CONSTITUTION:A top sheet 1 shaped in a plane steel plate and a bottom sheet 2 forming a vertical wall around its outer circumference are used to constitute a square floor panel that is made of the top sheet 1 and the bottom sheet 2 connected to each other at the outer circumference edges. Then, legs 9 mounted at the 4 corners of the bottom sheet 2, a diagonal line groove 5 formed along the diagonal line of the top sheet 1, and the flexibility of the steel plate at the bottom surface of the diagonal line groove 5 constitute a structure that enables the entire square floor panel to adapt itself to the groove of the floor surface. Thus, when the flatness of the under floor ground is inferior, the transformation is generated at the dividing part of the diagonal line and the legs at the 4 corners adapt themselves to keep contact with the ground at their respective levels, eliminating the generation of rattling.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a floorboard used as a free access floor in office automation rooms, general offices, and the like.

[Conventional technology]

The structure of conventional floor panels made of metal 1, for example, steel plates, is to integrate a bottom sheet with an uneven reinforcement structure into a roughly rectangular top sheet, and a finishing material such as a carpet or a synthetic resin layer on the top surface of the top sheet. It had a structure in which they were glued together. Furthermore, floorboards made of aluminum alloy or calcium silicate have a structure that is integrally formed by casting, molding, or the like.

IMI to be Solved by the Invention As described above, the conventional floorboard had a rigid structure formed in one piece, and therefore had the following problems. That is, if there is variation in the height direction of the four corners, wobbling will occur, so a high planar accuracy of the panel is required during manufacturing. Furthermore, during construction, if the flatness of the subfloor surface is not good, the floor surface will appear uneven, which requires a lot of time to adjust. Such looseness can be prevented by making the flooring material triangular and using a plurality of triangular flooring materials to make the same size as the square flooring material, as a three-point support assembly. However, triangular flooring materials are difficult to carry and handle, and some of the corners are sharp unlike square ones, making them weak. The disadvantage is that the cost per unit is high. Also,
There are also two triangular floorboards that are connected by a flexible surface material attached to the top surface, but because of the large amount of deformation, the surface materials and adhesives that can be used are limited, and care must be taken when transporting and handling. There are many problems such as Furthermore, no increase in strength can be expected compared to a single triangular floor panel. [Means for Solving the Problems] The present inventor took into account that square flooring materials are easier to carry and are cheaper than triangular flooring materials, and on the other hand, triangular flooring materials require three-point support. There is no backlash, so
For reasons such as no need to adjust play, we developed a flooring material that has the advantages of both triangular and rectangular flooring. That is, it consists of a flat steel plate top sheet (1) and a bottom sheet (2) with vertical walls formed on the outer periphery. In a rectangular floor panel formed by joining a top sheet (1) and a bottom sheet (2) at the outer periphery, legs (9) are provided at the four corners of the bottom sheet (2), and the top sheet (1) A diagonal groove (5) is formed on the diagonal of the floor panel, and the flexibility of the steel plate on the bottom of the diagonal groove (5) allows the entire rectangular floor panel to conform to the unevenness of the floor surface. (Function) A free access floor board with such a structure deforms at the diagonal dividing part when the flatness of the installed subfloor surface is poor.
The legs (9) at the four corners are attached to each other so as to be in contact with the ground at their respective levels, which has the effect of preventing any wobbling.

【Example】

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and is an enlarged cross-sectional view taken along the line AA in FIG. 2, and FIG. 2 is a plan view of an embodiment of a free access floor board with the surface material cut away. 3 to 5 are enlarged sectional views of the divided portion. In this example, the raised floorboard is a rectangular top sheet (
A flexible surface material (4) such as a carpet is pasted on the surface of a steel plate floor panel composed of a bottom sheet (1) and a bottom sheet (2). The surface material and the top sheet (1) may be attached over the entire surface with an adhesive, but may also be attached partially to increase the flexibility of the entire floor panel. The top sheet (1) is unique in that it is divided into two approximately triangular pieces at or near the diagonal line, and the diagonal ribs (3) are formed on each piece by bending the diagonal dividing plane at right angles. A diagonal groove (5) is formed between each diagonal rib. The diagonal ribs (3) are the divided portions (12) of the top sheet (1).
) may be formed by folding back the edges, or as shown in Figure 3, the bottom sheet (2) may be partially cut up and welded to the back side of the top sheet (1). Alternatively, as shown in FIGS. 4 and 5, separate members may be welded together as diagonal ribs. Symbols (9) are legs provided at the four corners, and (10) are auxiliary legs that are slightly lower than the legs provided along the diagonal grooves, and in this embodiment, they are separate members and are detachably provided on the floor panel body. However, the bottom sheet (2) may be formed into a convex shape. The reason for dividing the top sheet (1) is that when a load is applied to the floorboard, compressive stress is applied to the top side of the floorboard, and tensile stress is applied to the bottom side of the floorboard, so dividing the bottom side causes a decrease in strength. It is from. Furthermore, it is easier and cheaper to divide the top sheet 1-(1), which is a simple flat plate, than to divide the bottom sheet (2), which has irregularities for reinforcement, and it is easier and cheaper to divide it along the dividing line. Since diagonal ribs are provided, the strength is not reduced. FIG. 6 is a perspective view showing an example of the bottom sheet (2) of the free access floorboard as shown in FIG. A part of the corner of the rectangle that is on the dividing line of the top sheet (1) is provided with a slit (6) all the way to the bottom. Then, the diagonal groove (5
) forms a flat surface. In this embodiment, the parts other than the bottom (7) of the diagonal groove are as follows:
It has many convex drawing parts, but any other shape is acceptable, but when used after welding and assembling the top sheet (1), the top sheet (1) The shape is set to ensure dent strength, overall bending strength, and breaking strength. In all of the above examples, there is a cavity between the top sheet 1-(1) and the bottom sheet (2), but it is also possible to fill this portion with stuffing. The fillings include lightweight foam concrete, foam resin, wood, and honeycomb core. Similarly, in these examples, if the flatness of the installed subfloor surface is poor, the diagonal grooves (5) deform and conform to each other, preventing wobbling. A raised floor board like the one above has legs (9) at its four corners.
, if additional strength is required. Auxiliary legs (■0), which are slightly shorter than the legs (9) attached to the four corners, are provided at appropriate intervals in the diagonal grooves (12). The width of the dividing part (12) is preferably 0.5 to several millimeters. If you do this, the right angle corner of the finished product of the raised floor can be installed on a floor surface with unevenness of up to about 21 mm.
- to do. In addition, conventionally, there are rectangular floor panels such as JP-A No. 51-66129 and JP-A-57-180759 that are made to conform to uneven floor surfaces, but they are made of a material different from the floor panel itself. It is bonded with flexible material. Therefore, these are inconvenient to carry because of the excessive amount of deformation, and the strength is extremely reduced because the floor panel has a triangular configuration and the diagonal portions are only surface materials. The floor panel of the present invention is originally a rectangular panel, and only the top sheet is triangular. The panel itself is just a square, and the flexibility of the material that makes up the square panel allows it to conform to uneven floor surfaces. That is, since the flexibility of the hinge portion is due to the elasticity or flexibility of the steel plate constituting the floorboard, the amount of deformation thereof is small. Expressed in concrete numerical values, the amount of deformation per meter of panel length is a slight amount of deformation of about 4 to 6 m. However, the actual unevenness of the floor surface to be constructed is about 2 m per 1 m, and the panel of the present invention can sufficiently fit such an uneven floor surface. Therefore, since the floor panel of the present invention has fewer deformed layers, it is not inconvenient to carry, and its strength is comparable to that of conventional rectangular floor panels. Moreover, it is unique in that it is a completely square floor panel. In addition, in the case of rough and uneven floors (for example, 5
- 10m of unevenness) is used in combination with another level adjustment leg, etc. As mentioned above, the conventional floor panel is based on a triangular panel and deforms greatly, whereas the present invention is based on a square floor panel and aims to conform to small unevenness of the actual construction floor surface. - Both effects and composition are different. In particular, the present invention is significantly superior to conventional examples in terms of ease of handling and strength. Note that in the present invention, a rectangle does not only mean a regular square, but also includes a rectangle with different lengths and widths, and a shape with a corner cut out.

【Effect of the invention】

Although the free access floorboard of the present invention described in detail above is rectangular in shape, it absorbs the poor floor surface and plane accuracy and does not cause wobbling, similar to the triangular shape. It is easier to carry than a triangular type, and there is no need to mark out or adjust looseness, making construction extremely easy and reducing construction costs.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is an enlarged cross-sectional view taken along the line AA in FIG. 2, and FIG. 2 is a plan view of an embodiment of a free access floor board with the surface material cut away. 3 to 5 are enlarged sectional views of the divided portion. FIG. 6 is a perspective view showing an example of the bottom sheet. (1) Top sheet (2) Bottom sheet (3) Diagonal ribs (4) Surface material (5) Diagonal grooves (9
) Legs (10) Assistance! /IJ (11) Stuffing (1
2) Above the dividing part

Claims (1)

[Claims] 1 Consists of a steel plate flat top sheet (1) and a bottom sheet (2) with vertical walls formed on the outer periphery.
1) and a bottom sheet (2) joined together at the outer periphery, legs (9) are provided at the four corners of the bottom sheet (2), and legs (9) are provided on the diagonal lines of the top sheet (1). forming a diagonal groove (5); said diagonal groove (5);
A free access floor panel characterized in that the entire rectangular floor panel conforms to the unevenness of the floor surface due to the flexibility of the steel plate on the bottom surface.