JP4845194B2 - Floor panel and manufacturing method thereof - Google Patents

Description

  The present invention relates to an improvement of a floor panel for forming a double floor of an office building or the like and a manufacturing method thereof.

Conventionally, floor panels for forming a double floor have been widely used.
That is, as a flooring material for realizing a free access floor, a double floor structure in which a square panel of a predetermined size is connected and supported vertically and horizontally at a predetermined height by a support arm arranged on a slab or the like is widely spread. is doing. Below the floor panel constituting this double floor, power supply and signal wiring can be routed vertically and horizontally.

Such floor panels, in particular, are formed by using mortar or concrete in addition to those formed by iron plates or aluminum die casts (see Patent Documents 1 and 2).
Among such floor panels, those using concrete have the advantages of high rigidity, good walking feeling, and low manufacturing costs.

Utility Kaihei 1-75527 Utility Model 1-75528

By the way, when a concrete panel is used as a floor panel for forming a double floor, electromagnetic waves generated by various wirings and electronic / electrical devices under the floor pass. For this reason, there exists a fault which gives various bad effects, such as a noise appearing on the front side of a floor. This is because the concrete of the concrete panel itself transmits electromagnetic waves.
By the way, in the conventional floor panel of the said patent document 1 etc., the metal reinforcement board is being fixed to the bottom part of a concrete panel. Therefore, when such a reinforcing plate is fixed to the concrete panel, it is considered that the region covered with the reinforcing plate can be shielded against electromagnetic waves by forming the reinforcing plate with a conductive metal.

  However, considering that the bending stress acts when fixing the reinforcing plate to the concrete panel, as described in Patent Documents 1 and 2, a part of the metal reinforcing plate is cut and raised, It is necessary to form a large number of projecting pieces that enter the panel and be firmly fixed. For this reason, since the portion where the projecting piece is formed becomes a hole, in the conventional structure, there are a large number of holes through which the electromagnetic wave is removed in the metal reinforcing plate, which cannot be shielded.

  The present invention has been made in order to achieve the above object, and has a high rigidity, good walking feeling, low manufacturing cost, and a floor panel having the ability to shield electromagnetic waves and its manufacture It aims to provide a method.

The floor panel of the present invention is fixed to the panel body so as to cover a panel body made of concrete or mortar, a reinforcing plate with an anchor fixed to one surface of the panel body, and the other surface and side surface of the panel body. A through hole is formed so as to penetrate the conductive metal cap, the panel body, and the reinforcing plate in order to insert a screw for fixing to the support arm. And the opening in the reinforcing plate of the through hole has a large diameter that does not restrain the screw when the screw is inserted, and the through hole opening of the conductive metal cap is inward. It is provided with the inclination peripheral part which inclines toward .

According to the said structure, since the panel main body of the panel for floors of this invention is formed with concrete or mortar, it can be manufactured cheaply. Moreover, since the reinforcing plate is fixed to the panel body using an anchor, it is difficult to be destroyed even if bending stress is applied. Furthermore, since the cap made of conductive metal is fixed to the panel body, particularly from one side of the floor panel to the other side, that is, when this is disposed on the double floor, from the space under the panel, To the front side of the panel (
(Or vice versa) It is possible to appropriately prevent the electromagnetic wave from passing through and to realize a double floor for electromagnetic wave shielding.
Further, if the hole into which the screw of the support plate of the support leg on which the floor panel is to be placed and fixed is tapered so as to be convex upward, this convex taper portion is the aforementioned large portion. Enter the diameter opening and align. For this reason, the alignment of the holes between the floor panel and the support plate is facilitated, and the fixing operation is facilitated.
Furthermore, when the through-hole opening has an inclined peripheral edge that is inclined inward, the head portion of the screw can be brought into contact with the inclined peripheral edge when fixing with a countersunk screw. . For this reason, the formed floor surface becomes flat without the head portion of the screw projecting from the floor panel.

Preferably, the panel body is a square or a rectangle.
According to the above configuration, when the panel body is square or rectangular, the floor panel can also have such a form, and the layout design is facilitated when a large number of panels are arranged vertically and horizontally.

Preferably, the outer edge of the reinforcing plate is formed smaller than the outer edge of the panel body.
According to the said structure, even if a reinforcement board and a panel main body shift to some extent in the process of manufacturing a floor panel, a reinforcement board does not protrude from the outer edge of a panel main body.

Preferably, the panel body is G
It is formed by RC.
According to the above configuration, a floor panel having low cost, high rigidity, and good walking feeling can be obtained.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

1 and 2 are explanatory views showing a double floor structure 10 formed by floor panels according to an embodiment of the present invention.
In the schematic perspective view of FIG. 1, support legs 11 are arranged on a floor slab or the like. The support leg 11 has a support plate 12 for supporting the floor panel above the floor slab, for example.
On the support plate 12, square floor panels 20, 20, 20 are placed in the illustrated case. Each floor panel 20 is formed with a through hole 31 for inserting a screw, and is fixed with screws using the through hole 13 of the support plate 12 as described later.
In the case shown in the figure, the support legs 11 are arranged at the intersections where the corners of the four floor panels are brought into contact with each other, and the support legs 11 place the corners of the four floor panels on the support plate 12. The example of a structure in the case of mounting on and fixing is shown, and space US is formed under the panel for floors. In this space US, an electric wiring cord or the like required in the office can be routed.

The structure of FIG. 1 is formed on the entire upper surface of a floor slab, for example, and a tile carpet 50, for example, is laid on the structure as shown in FIG. On top of that, for example, office furniture K can be arranged.
In this way, the space US shown in FIG. 1 is formed so as not to be seen under the floor of the office so that necessary electrical wiring and accessory devices can be accommodated, and the cords can be freely routed when these wirings are changed. Has been.

Next, the configuration of the floor panel 20 according to the embodiment of the present invention will be described with reference to FIGS. 3 to 6. 3 is a schematic plan view of the floor panel, FIG. 4 is a schematic perspective view showing an enlarged part of the floor panel, FIG. 5 is a schematic cut end view taken along the line AA of FIG. 3, and FIG. FIG.
As shown in FIG. 3, the floor panel 20 can be formed in a square or rectangular shape as a whole, and can have other geometric shapes, not limited to these shapes. In designing the double floor, the floor and floor are fixed, and no matter how many squares are arranged, the vertical and horizontal sizes are always the same, and there is an advantage that work is easy.

  Recesses 21 and 21 are formed in the center of, for example, two sides of the floor panel 20. As shown in FIG. 4, the concave portion 21 has a configuration in which the edge portion is cut out, and is used to draw a cord from the underfloor space US described in FIG. 1 or to form an outlet in this portion. It has become so. In the case of FIG. 3, two recesses 21 are formed, but either one may be formed or may not be formed depending on the panel.

FIG. 5 shows a detailed cross-sectional configuration of the floor panel 20, and reference is made to FIGS. 5 and 6.
In these drawings, a floor panel 20 includes a panel main body 22 made of concrete or mortar, a reinforcing plate 23 with an anchor fixed to one surface (lower surface in the figure), and the other surface (upper surface) of the panel main body 22. ) And a conductive metal cap (hereinafter referred to as “cap”) 24 fixed to the panel main body 22 so as to cover the side surface.

The panel main body 22 is a plate having the same shape as the floor panel 20 shown in FIG.
When the panel body 22 is formed of mortar or concrete, there is an advantage that the manufacturing cost can be suppressed as compared with the case of forming the panel body 22 from metal.
In the present embodiment, the panel body 22 is particularly formed of GRC (Glassfiber Reinforced Concrete) (glass fiber reinforced concrete), and has a high rigidity structure.

A reinforcing plate 23 is fixed to the lower surface of the panel body 22 through a process described later. The reinforcing plate 23 is used to reinforce the concrete panel main body so that the concrete panel body is not broken when bending stress is applied. For example, a metal plate made of a metal material such as a zinc steel plate is used. ing.
The reinforcing plate 23 is deformed by raising a tongue-like portion formed by punching the reinforcing plate 23 while leaving a part of the connection portion in order to strengthen the fixation with the panel body 22 and protrudes upward in the figure. As a projection, the tip 24 is bent further to have a claw-like anchor 24.
The reinforcing plate 23 has an outer shape slightly smaller than the outer shape of the panel body 22, so that a gap 25 is formed.

Further, a cap 28 is fixed to the panel body 22 in order to realize an electromagnetic wave shield described later. The cap 28 is formed by press-molding a conductive metal, for example, a galvanized steel plate. The cap 28 covers the entire top surface of the panel body 22 and the side surface covering the side surfaces (all four side surfaces) of the panel body 22. It has a portion 28b.
That is, the cap 28 is an electromagnetic shield plate that covers the entire outer surface other than the surface covered by the reinforcing plate 23 of the panel body 22.

Further, as shown in detail in FIG. 6, a through hole 31 is formed so as to penetrate the cap 28, the panel body 22, and the reinforcing plate 23. The through-hole 31 has at least a (hole) portion 34 formed in the panel main body 22 larger than the outer shape of the fixing screw 35, and similarly, the opening 32 in the reinforcing plate 23 of the through-hole is inserted. The diameter of the screw 35 is slightly larger than that of the screw 35, that is, a diameter that does not restrain the screw.
Moreover, the through-hole opening of the cap 28 is made into the inclined peripheral part 33 which inclines in a mortar shape or taper shape toward inward as shown in figure.

The floor panel 20 of the present embodiment is configured as described above, and a conductive metal cap 28 is fixed to the panel body 22.
For this reason, as shown in FIG. 6, even if the electromagnetic wave E generated in the space US under the floor passes through the hole formed by cutting and raising the anchor 24 of the reinforcing plate, The electromagnetic wave E always strikes the cap 28. Here, since the cap 28 is formed of a conductive metal, the electromagnetic wave E is shielded by the cap 28 and does not pass outside.
Thus, when the floor panel 20 is used to form a double floor as described with reference to FIGS. 1 and 2, the floor panel 20 is moved from one side to the other side, that is, from the surface side of the panel, or from the interior of the room. It is possible to appropriately prevent electromagnetic waves generated by equipment and the like from passing from the room to the bottom of the floor, and to realize a double floor for shielding electromagnetic waves.

Further, as described with reference to FIG. 1, the support legs 11 of FIG. 1 are arranged on a floor slab or the like, and the floor panel 20 of the present embodiment is fixed to the support plate 12. Further, as described with reference to FIG. 6, in order to insert the fixing screw 35, the cap 28
A through hole 31 is formed so as to penetrate the panel body 22 and the reinforcing plate 23, and an opening 32 in the reinforcing plate 23 of the through hole 31 is formed.
However, the diameter is larger than the normal hole diameter. That is, the opening 32 has a large diameter so as not to come into contact with or mesh with the male screw portion of the screw 35 inserted through the through hole 31.

Here, the peripheral region 15 of the through hole 13 of the support plate 12 of the support leg on which the floor panel 20 is to be mounted and fixed is formed in a tapered shape so as to protrude upward as shown in the figure. If so, the convex taper portion 15 enters the large-diameter opening 32 and is aligned. For this reason, the alignment of the through holes between the floor panel 20 and the support plate 12 is facilitated, and the fixing work is facilitated.
That is, as shown in FIG. 1, when a plurality of floor panels 20 are placed on the support plate 12, the through holes 13 of the support plate 12 become invisible. For this reason, when the alignment is enabled as described above, the fixing operation of the floor panel 20 becomes extremely easy.

  In addition, as described in FIG. 6, when the through hole opening of the cap 28 includes the inclined peripheral edge portion 33 that is inclined inward, the cap 28 is fixed by using a (dish) screw 35 as illustrated. Further, the tapered side surface 35 b of the screw head portion 35 a can be brought into contact with the inclined peripheral edge portion 33. In this state, when the through hole 13 of the support plate 12 is inserted and screwed with the nut 16 or the like, the head portion 35a of the screw 35 does not protrude from the upper surface of the floor panel 20, and the formed floor surface is flat. It will be a thing. For this reason, when the tile carpet 50 or the like is further laid on the floor panel 20, the floor can be formed with good finish.

(Production method)
Next, an example of a method for manufacturing the floor panel 20 will be briefly described with reference to FIGS.
(Insert process)
As shown in FIG. 7, the above-described reinforcing plate 23 is placed on the inner mold 32 having a flat upper surface. In this case, the reinforcing plate 23 is formed with an anchor 24 whose tip protrudes in a claw shape in advance and is arranged in a state of protruding upward.

(Concrete and mortar placement process)
Concrete or mortar is disposed on the reinforcing plate 23.
In the case of this embodiment, it is formed by GRC, and in addition to cement, sand, an admixture, and water, concrete 31 in which glass fiber chopped strands are kneaded with a mixer or the like is poured and arranged.
(Pressing process)
Next, as shown in FIG. 7, the upper die 33 having an inner surface shape corresponding to the shape of the panel main body 22 described above is lowered in the arrow direction. Thereby, the concrete 31 is pressed and dehydrated in the mold.

(Curing process)
After leaving the mold, the concrete is cured by leaving it for a predetermined time, and as shown in FIG. 8, a panel body 22 with a reinforcing plate 23 fixed thereto is formed.
(Cap fixing process)
Next, the cap 28 described with reference to FIGS. 5 and 6 is fixed so as to cover the panel body 22 as shown in FIG. That is, the cap 28 made of a conductive metal is firmly fixed to the panel main body 22 by bonding and fixing.
Thus, the floor panel 20 is completed.

According to the manufacturing method of the present embodiment, the floor structure having the electromagnetic wave shielding performance described with reference to FIG. 6 is formed only by adding a step of covering and fixing a conductive metal cap to the manufacturing process of the conventional floor panel. Floor panel 20 can be manufactured.
In particular, if the outer edge of the reinforcing plate 23 is formed smaller than the outer edge of the panel body to be molded in the process of FIG. 7, the concrete 31 to form the reinforcing plate 23 and the panel body when the mold is closed. Even if the position is slightly shifted, the reinforcing plate 23 does not protrude from the outer edge of the panel body 22 in the state of FIG.

The present invention is not limited to the above-described embodiments. The outer shape of the floor panel is not limited to a rectangle or a square, but may be another polygon or a curved outer shape.
Each configuration in each of the above-described embodiments may be implemented under a combination of different configurations, if necessary, by omitting a part thereof or replacing other configurations.

The figure for demonstrating the double floor structure formed using the floor panel concerning embodiment of this invention. Schematic which shows an example of the external appearance of the floor structure of FIG. 1 is a schematic plan view of a floor panel according to an embodiment of the present invention. The partial expansion perspective view which expands and shows a part of floor panel of FIG. The AA cut | disconnection end elevation of FIG. The figure which expands and shows a part of FIG. The figure which shows an example of the manufacturing process of the panel for floors of FIG. The figure which shows an example of the manufacturing process of the panel for floors of FIG. The figure which shows an example of the manufacturing process of the panel for floors of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Support leg, 12 ... Support plate, 13 ... Through-hole, 20 ... Floor panel, 21 ... Recess, 22 ... Panel body, 23 ... Reinforcement plate, 24 ... Anchor, 28 ... (made of conductive metal) cap, 31 ... through hole, 32 ... opening

Claims (4)

A panel body made of concrete or mortar,
A reinforcing plate with an anchor fixed to one surface of the panel body;
A conductive metal cap fixed to the panel body so as to cover the other surface and side surface of the panel body,
In order to insert a screw for fixing to the support arm, a through-hole is formed so as to penetrate the conductive metal cap, the panel body, and the reinforcing plate, and the through-hole in the reinforcing plate When the opening is inserted through the screw, the diameter is large enough not to restrain the screw,
The floor panel according to claim 1 , wherein the through-hole opening of the conductive metal cap includes an inclined peripheral edge portion inclined inward .   The floor panel according to claim 1, wherein the panel body is square or rectangular.   The floor panel according to claim 1, wherein the reinforcing plate outer edge is formed smaller than the panel main body outer edge.   The floor panel according to any one of claims 1 to 3, wherein the panel body is formed of GRC.

Images