JPH0662084U - Floor panel - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent local strain from occurring due to concentrated load on the center. [Structure] A floor panel for constructing a double floor, in which an upper first plate 11 and a lower plate 12 are joined together to form a square panel shape. In the floor panel in which 21 and the cross-shaped second ridge 22 are formed, a central reinforcing portion 25 is formed in the center of the second ridge 22. The central reinforcing portion 25 includes a central concave portion 26 formed in a truncated cone shape, and a radial concave portion 27 that is concentric with the central concave portion 26 and that is arranged similarly to the second ridge 22. [Effect] The concentrated load on the central portion of the main body 10 is
Since it is dispersed in a wide range by the radial concave portions 27, local strain can be prevented. Further, the depression of the central portion can be prevented by the hole bottom wall of the central concave portion 26.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a floor panel, and more particularly to a floor panel laid on a floor surface of a building to form a double floor.

[0002]

[Prior art]

 By laying floor panels on the floor of the building to build a double floor, you can freely wire cables for electric devices such as telephones and computers in the space between the floor panels and the floor. . By opening a cable outlet in the floor panel in advance, the cables wired between the floor panel and the floor surface can be pulled out from the desired location onto the floor panel, and the desired telephone, computer, etc. Can be connected to electrical equipment.

As a conventional floor panel of this type, there is a floor material disclosed in Japanese Utility Model Publication No. 3-99140. In other words, this floor material has a square panel-shaped main body formed by joining an upper plate formed in a square flat plate shape and a lower plate formed in a plate shape having substantially the same contour as the upper plate to each other. Has been formed. The lower plate is formed with a first convex strip projecting downward along the outer peripheral edge thereof in a square ring shape on the plate surface, and radially from the center position of the plate surface toward each corner of the first convex strip. In addition, the second ridge protruding downward from the plate surface is formed continuously with the first ridge. The upper plate and the lower plate are opposed to each other and fixed to each other on the plate surface excluding the portions where the first and second ridges are formed. Further, each of the corners of the first ridge is provided with a mounting holding portion for supporting the main body at a predetermined distance from the construction foundation surface.

[0004]

[Problems to be solved by the device]

 However, in the floor panel as described above, it is conceivable that the central portion of the floor panel is locally distorted when the load is concentrated on the central portion.

Therefore, conventionally, in order to prevent the local distortion, the plate thickness of each floor panel is designed to be thick as a whole, or a reinforcing material such as high-strength concrete material is provided in the space of each floor panel. Is considered to be filled.

An object of the present invention is to prevent the occurrence of local strain due to a concentrated load on the central portion without filling a reinforcing material, and to make the strain due to the concentrated load uniform over the entire floor panel. To provide.

[0007]

[Means for Solving the Problems]

 The floor panel according to the present invention has a polygonal panel shape in which an upper plate formed in a polygonal flat plate shape and a lower plate formed in a plate shape having substantially the same contour as the upper plate are joined to each other. The main body of the lower plate is formed, and at least the ridges protruding from the plate surface center position of the lower plate toward the respective corners of the main body and protruding downward from the plate surface are formed. The upper plate and the lower plate are opposed to each other and fixed to each other except the plate surface, and further, a mounting holding portion is provided at each corner of the main body for supporting the main body at a predetermined distance from the construction foundation surface. In the floor panel, the central reinforcing portion is formed so as to project relatively upward in the central portion of the lower plate so as to be continuous with the ridge, and the central reinforcing portion is concentric with the center of the ridge. The central recess that is placed and shaped like a frustum, In central recess concentric, and is characterized by comprising a radial recess that is formed radially so arranged that it is similar to the ridge.

[0008]

[Action]

 According to the above-mentioned means, since the central reinforcing portion is formed in the central portion of the ridge, even when a large load is concentrated on the central portion of the upper plate, the central portion of the floor panel main body is No distortion occurs in the part. That is, since the upper surface of the hole bottom wall in the central concave portion of the central reinforcing portion is abutted and fixed to the lower surface of the upper plate, the thickness of the central portion of the floor panel body is doubled by the upper plate and the lower plate. It has become the thickness of. Therefore, the plate surface at the center of the floor panel body will not be locally depressed.

When the central portion of the floor panel body 10 having the two-plate structure is to be entirely depressed with the two-plate structure, the side forming the conical surface of the central concave portion of the central reinforcing portion. Since the load in the vertical direction is distributed diagonally downward by the wall, a part of the sinking force acting in the vertical direction relatively escapes in the horizontal direction. Further, the obliquely downward force distributed on the side wall portion forming the conical surface of the central concave portion is transmitted to the radial concave portion integrally provided on the side wall portion of the central concave portion. Since the radial concave portion extends radially farther than the conical surface of the central concave portion, the force transmitted to the radial concave portion is dispersed farther.

Then, the force dispersed by the central concave portion and the radial concave portion is finally transmitted to the lower surface wall of the ridge. Since the force transmitted to the bottom wall of this ridge is supported by an extremely large area on the bottom wall of this ridge, when the load concentrated on the center of the floor panel is relatively large. However, the force supported by each local part of the ridge is suppressed to a small value. Therefore, each of the ridges can fully support a large load concentrated on the central portion of the floor panel without locally sinking.

As described above, according to the above-mentioned means, even when a large load is concentrated on the central portion of the floor panel body, it is possible to prevent a depression from being generated in the central portion of the upper plate. In addition to being able to prevent, it is possible to effectively prevent the entire central portion where the upper plate and the lower plate of the floor panel body are joined from sinking.

[0012]

【Example】

 1A and 1B are views showing a floor panel according to an embodiment of the present invention. FIG. 1A is a bottom view, FIG. 1B is a front sectional view, and FIG. 1C is a partial sectional view taken along line cc. 2 (a) is a partially omitted plan view of the floor panel, and FIG. 2 (b) is a cross-sectional view of essential parts showing a state in which the floor panel is placed on the floor surface. 3A and 3B are views showing the central reinforcing portion, FIG. 3A is a perspective view, and FIG. 3B is an enlarged partial sectional view.

In this embodiment, a plurality of floor panels according to the present invention are laid on the floor surface of a building to be used to construct a double floor. The floor panel 1 is provided with a main body 10, and the main body 10 is formed into a square panel shape as a whole by joining two steel plates vertically (front and back). As the steel plate, it is possible to use an inexpensive ordinary steel plate, a galvanized steel plate, a vibration damping steel plate, or the like.

One of the two steel plates of the floor panel body 10 is formed as a square flat plate as the upper plate 11. The other steel plate is formed as the lower plate 12 into a square plate shape having irregularities. In a state where the upper plate 11 and the lower plate 12 are vertically stacked, the upper surface of the upward convex portion of the lower plate 12 is brought into contact with the lower surface of the upper plate 11, and spot welding or rivet caulking is performed between the contact surfaces. A fixed portion (not shown) such as a portion is formed, and caulking is performed on the outer periphery of the fixed portion so that they are firmly connected to each other.

At the four corners of the floor panel body 10, connecting tool mounting portions 13 are formed in a quadrant shape. Each connecting portion mounting portion 13 is formed by vertically bending downward in a state where the upper plate 11 and the lower plate 12 are joined and then further horizontally bending. In a state where the four floor panels 1 are butted against each other, a circular hole is formed by the four connector mounting portions 13, and a connector (not shown) is inserted into the circular hole, so that the four holes are connected to each other. By engaging the connecting part with the engaging part of the mounting part 13, the four floor panels 1 are connected to each other.

Female screw fittings 14 for attaching the support legs 15 are vertically inserted and fixed inside the four connector attachment portions 13 of the floor panel body 10. A support leg 15 having a male screw portion is screwed into and attached to the female screw fitting 14. The four support legs 15 are erected on the floor surface 16 so that the floor panel 1 is horizontally supported while being floated from the floor surface 16.

A pair of cable outlets 17, 17 is formed in a substantially U-shape on one of the opposite sides (hereinafter referred to as the front side and the rear side) of the four front, rear, left and right sides of the floor panel body 10. It has been opened. The cable outlet 17 has a notch 18 cut out in a substantially U shape in the upper plate 11 and a bent portion 19 bent upward in a notch in a lower U shape in the lower plate 12. It is formed by being caulked. The cable outlet 17 allows cables (not shown) wired in the space below the floor panel 1 group to be drawn out to the space above the floor panel 1 group.

A first ridge 21 and a second ridge 22 are formed on the lower plate 12 into a substantially grooved steel shape by embossing. That is, the first ridges 21 and the second ridges 22 are formed in a substantially groove-shaped steel shape having a side wall portion protruding downward from the plate surface of the lower plate 12. In this embodiment, the side walls of the first ridge 21 and the second ridge 22 are formed in a substantially flat plate shape, but these side walls also have gentle curves like the side walls of the recesses described later. You may form in.

The first ridge 21 is formed in a square annular substantially grooved steel shape along the outer peripheral edge of the lower plate 12, and is concentrically arranged on the lower plate 12. That is, the first ridge 21 is formed in a substantially square frame shape in which a bottom view is slightly similar to the lower plate 12, and the lower plate 12 has a fixing margin portion left on the outer peripheral side thereof. They are arranged concentrically within the 12 plate surfaces.

The second ridge 22 is formed in a substantially grooved steel shape having a cross shape in a bottom view, and is arranged along the diagonal line at the center of the lower plate 12. That is, the second ridge 22 is formed in a cross shape having a length slightly shorter than a pair of diagonal lines of the lower plate 12 when viewed from the bottom, and the center thereof is aligned with the center of the lower plate 12, The four terminal portions are connected to the four corner portions of the first ridge 21.

The four corners of the first ridge 21 and the four end portions of the second ridge 22 are in a mutually continuous state. That is, the valley-shaped ridge line, which is the connecting portion between the four corners of the first ridge 21 and the four end portions of the second ridge 22, is gentle without any breaks or steps on its side wall and bottom wall. It has a curved surface and is continuously connected.

The lower plate 12 has four Nakasu-shaped portions 23 formed in a substantially isosceles triangular shape by being surrounded by the first ridges 21 and the second ridges 22. They are formed so as to be opposed to each other on the 12 vertical and horizontal centerlines. Inside each of the Nakasu-shaped portions 23, each of the protrusions 24 is formed so as to protrude downward from the plate surface by embossing. Each of the convex portions 24 is formed in a substantially triangular shape whose bottom view is small and similar to the Nakasu-shaped portion 23, and is arranged in a similar shape to the Nakasu-shaped portion 23.

Incidentally, each of the protrusions 24 is formed to be lower than the first protrusion 21 and the second protrusion 22 within a range not exceeding the elongation limit of the material. However, it is desirable that the protrusions 24 are formed at the same height as the first protrusions 21 and the second protrusions 22 as long as the elongation limit of the material is not exceeded.

In the present embodiment, the area of the cruciform intersection of the second ridges 22 is relatively wide, being about one ninth of the entire lower plate 12. Therefore, the central reinforcing portion 25 is arranged on the lower plate 12 at the cross-shaped intersection of the second ridges 22 so as to relatively project upward from the plate surface of the second ridges 22 by embossing. It is integrally molded. The central reinforcing portion 25 is composed of a central concave portion 26 and a radial concave portion 27.

The central concave portion 26 of the central reinforcing portion 25 is arranged so as to be concentric with the center of the cross shape of the second ridge 22. The central concave portion 26 is formed into a substantially frustoconical hole shape having an outer diameter smaller than the inner diameter of the cross-shaped central portion of the second convex strip 22, and the side wall forming the conical surface is located on the upper plate 11 side. It is formed on an extremely gentle convex curved surface that projects. Further, the depth of the central concave portion 26 is set to be equal to the height of the second convex strip 22, and the hole bottom wall of the central concave portion 26 is formed in a flat plate shape. Therefore, the central concave portion 26 is abutted against the lower surface of the upper plate 11 on the upper surface of the hole bottom wall and fixed by spot welding or the like.

On the other hand, the radial concave portion 27 is formed in a substantially equilateral angle steel shape having a cross shape in a bottom view, and the widthwise dimension of the four radial portion pieces is larger than the widthwise dimension of the second ridge 22. It is small and is formed so that it becomes thinner toward the tip. The radial concave portions 27 are arranged so that the center of the cross shape thereof coincides with the center of the central concave portion 26, and is similar to the cross shape of the second projection 22.

Further, the depth of the radial concave portions 27 is set to be shallower than the height of the second convex stripes 22, and the apex angle portion thereof is separated from the upper plate 11. The vicinity of the central portion of the radial concave portion 27 is integrally connected to the side wall forming the conical surface of the central concave portion 26. Then, the valley-shaped ridge line, which is the connecting portion between the radial concave portion 27, the central concave portion 26, and the second convex line 22, is continuously connected with an appropriate curved surface without any breaks or steps. Is formed in.

In the present embodiment, a space is formed below the upper plate 11 by the uneven portions of the lower plate 12 of the floor panel body 10. The floor panel body 10 is configured to prevent vibration when a person walks or a load carrier travels while being laid on the floor surface 16.

In addition, when the floor panel body 10 is manufactured using the upper plate 11 and the lower plate 12, if the edge portions of the upper plate 11 and the lower plate 12 are caulked over the entire circumference. Both are fixed by spot welding or riveting. Further, the contact surfaces of the upper plate 11 and the lower plate 12 are joined to each other by spot welding, riveting or the like.

Next, a method of using the floor panel having the above structure will be described.

When the floor panel 1 is laid on the floor surface, the male screw portions of the support legs 15 are respectively screwed into the female screw fittings 14 at four locations. The floor panel 1 is placed on the floor surface 16 with the support legs 15 facing downward, with the lengths of the support legs 15 screwed in appropriately adjusted. When the floor panel 1 has rattling, the height of each support leg 15 is appropriately finely adjusted.

After the plurality of floor panels 1 are placed on the floor surface 16, the four floor panels 1 are abutted at their four corners. Connecting tools (not shown) are mounted in the circular holes formed by the respective connecting tool mounting portions 13 of the four floor panels 1 to connect the four floor panels 1 to each other. With this connection, the plurality of floor panels 1 are stably laid on the floor surface 16.

When an electric cable, a telephone cable, or the like is connected to an electric device such as a telephone or a computer, cables (not shown) wired on the floor surface 16 are pulled out from the cable outlet 17 to the floor panel. 10 is pulled out and connected to an electric device, a telephone or the like.

As described above, after the plurality of floor panels 1 are laid on the floor surface 16, a desk, an electric device or the like is installed on each floor panel 1. At this time, a relatively large load may be concentrated on the floor panel 1, and the floor panel 1 may act arbitrarily without specifying the location in advance. Therefore, each floor panel 1 needs to be robustly designed over the entire double floor.

When a large load is applied to the entire floor panel according to the present embodiment, the first ridges 21, the second ridges 22 and the ridges 24 are formed in a tubular shape having side wall portions. Since the floor panel body 10 exhibits sufficient rigidity, it is not locally distorted.

Further, since the first protrusion 21 formed in an annular shape and the second protrusion 22 formed in a radial shape are concentrically combined and arranged, the first protrusion 21 and the second protrusion 22 formed in a radial shape are arranged from the peripheral portion of the floor panel body 10. There is no flat part that continues to the center. Therefore, buckling does not occur in either the radial direction or the annular direction of the floor panel body 10.

By the way, assuming that a large load is concentratedly applied to the central portion of the floor panel body 10, when the central reinforcing portion 25 is not formed in the central portion of the second ridge 22, the central portion of the upper plate 11 is not formed. Can be locally distorted (dented).

However, in this embodiment, since the central reinforcing portion 25 is formed in the central portion of the second ridge 22, it is possible to apply a large load to the central portion of the upper plate 11 in a concentrated manner. However, the distortion does not occur in the central portion of the floor panel body 10.

That is, in this embodiment, since the hole bottom wall upper surface in the central recess 26 of the central reinforcing portion 25 is abutted and fixed to the lower surface of the upper plate 11, the central portion of the floor panel body 10 is fixed. The plate thickness of the upper plate 11 and the lower plate 12 is doubled. Therefore, the state where the plate surface in the central portion of the floor panel body 10 is locally depressed does not occur.

When the central portion of the floor panel body 10 having the two-plate structure is to be entirely depressed with the two-plate structure, the conical surface of the central concave portion 26 of the central reinforcing portion 25 is formed. Since the vertical load is distributed diagonally downward by the side wall part, the part of the vertical sinking force relatively escapes in the horizontal direction.

Further, the obliquely downward force distributed to the side wall portion forming the conical surface of the central recess 26 is transmitted to the radial recess 27 integrally connected to the side wall of the central recess 26. Since the radial recesses 27 extend radially farther than the conical surface of the central recess 26, the force transmitted to the radial recesses 27 is dispersed farther.

Then, the force dispersed by the central concave portion 26 and the radial concave portion 27 is finally transmitted to the lower surface wall of the second ridge 22. The force transmitted to the lower wall of the second ridge 22 is supported by the extremely large area of the lower wall of the second ridge 22, so that the load concentrated on the central portion of the floor panel 10 is applied. Even if it is relatively large, the force supported by each local portion of the second ridge 22 is suppressed to be small. Therefore, each of the second ridges 22 can sufficiently support a large load intensively applied to the central portion of the floor panel 10 without sinking locally.

As described above, in the floor panel according to the present embodiment, even when a large load is intensively applied to the central portion of the floor panel body 10, the upper panel 11 has a central portion. It is possible to prevent the occurrence of a depression, and it is possible to effectively prevent the entire central portion where the upper plate 11 and the lower plate 12 of the floor panel body 10 are joined from sinking.

It is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

For example, when the steel plate used for the lower plate 12 is thin, etc., the central reinforcing portion may be configured as shown in FIG. That is, the central reinforcing portion 25A shown in FIG. 4 is formed in a cross shape in which the radial concave portion 27A is within the range of the cross intersection of the second ridges 22. That is, the radial concave portions 27A are formed concentrically with the central concave portion 26A so that the respective tip portions thereof do not reach the inside of the vertical stripe side and the horizontal stripe side of the second convex stripe 22.

Further, the central concave portion of the central reinforcing portion is not limited to be formed in a truncated cone shape, but may be formed in a polygonal truncated cone shape such as a triangle or a hexagon.

By forming the floor panel having the above-mentioned configuration using a metal plate material, it is possible to secure a sufficient load strength for practical use, but in particular, a higher load strength is required. In some cases, such as when the steel plate is particularly thin, the internal space between the upper plate and the lower plate may be filled with a reinforcing material such as foaming cement or mortar.

The floor panel body 10 is not limited to a square plate shape, but may be a polygonal plate shape such as a triangle or a hexagon.

[0049]

[Effect of device]

 As described above, according to the present invention, even when a large load is concentrated on the central portion of the floor panel body, it is possible to prevent the depression from being generated in the central portion of the upper plate. In addition, it is possible to effectively prevent the entire central portion where the upper and lower plates of the floor panel body are joined from sinking.

[Brief description of drawings]

1A and 1B are views showing a floor panel according to an embodiment of the present invention, in which FIG. 1A is a bottom view, FIG. 1B is a front sectional view, and FIG.
FIG. 7 is a partial cross-sectional view taken along the line cc.

FIG. 2A is a partially omitted plan view of the floor panel, and FIG. 2B is a cross-sectional view of essential parts showing a state in which the floor panel is placed on the floor surface.

FIG. 3 is a view showing a central reinforcing portion, (a) is a perspective view,
(B) is an enlarged partial sectional view.

FIG. 4 is a view showing a floor panel according to another embodiment of the present invention, (a) is a bottom view, (b) is a front sectional view,
(C) is a partial sectional view taken along the line cc.

[Explanation of symbols]

10 ... Floor panel, 11 ... Upper plate, 12 ... Lower plate, 13 ...
Connector mounting portion, 14 ... Female thread fitting, 15 ... Support leg, 16
… Floor, 17… Cable outlet, 18… Notch, 19…
Bent part, 21 ... 1st convex line, 22 ... 2nd convex line, 23 ... Nakashu shape part, 24 ... Convex part, 25, 25A ... Central reinforcement part, 2
6, 26A ... central recess, 27, 27A ... radial recess.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hayanobu Seto Itoki Toko Mfg. Co., Ltd. 423 Kuito, Iwai City, Ibaraki Prefecture (72) Inventor Kayasu Sato Kamiyabe-cho, Totsuka-ku, Yokohama-shi, Kanagawa 320 Fujii Hashimoto Forming Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An upper plate formed in a polygonal flat plate shape,
A polygonal panel-shaped main body is formed by joining the upper plate and a lower plate formed in a plate shape having substantially the same contour, and each corner portion of the main body is formed from at least the center position of the plate surface of the lower plate. A ridge that is radially directed toward and that projects downward from the plate surface is formed, and the upper plate and the lower plate are fixed so as to face each other on the plate surface excluding the location where the ridge is formed. In a floor panel in which an attachment holding portion that supports the main body at a predetermined distance from each of the corner portions is provided in each corner portion, a central reinforcing portion projects relatively upward in the central portion of the lower plate, and The central reinforcing portion is formed so as to be continuous with the ridge, and the central reinforcing portion is arranged concentrically with the center of the ridge and is formed into a frustum shape, concentric with the central concave portion, and It is arranged so as to be similar to the ridge and is formed in a radial shape A floor panel having a radial recess formed therein.