JP2010043448A - Panel for free-access floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel for a free-access floor, which enables a panel body portion and a reinforcing plate member to be joined together with sufficient strength, and which can prevent an increase in the weight and cost of the panel body portion. <P>SOLUTION: This panel for the free-access floor comprises the panel body portion 12 which has a face plate portion 4 and a plurality of ribs 6 integrally formed with a height on the backside of the face plate portion 4, and the reinforcing plate member 14 which is joined to height ends of the plurality of ribs 6. The height end of the rib 6 and the reinforcing plate member 14 are joined together with a frictional agitating joint means. The panel body portion and the reinforcing plate member can be joined together with the sufficient strength, and the increase in the weight and cost of the panel body portion can be prevented. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a free access floor panel that forms a floor surface of a free access floor laid on a floor of a room such as a clean room or a computer room.

  2 and 3 are a plan view and a side sectional view showing a panel 2 for free access floor (hereinafter also referred to as panel 2) according to the first prior art. This panel 2 is maintained in a state where it is horizontally supported at a predetermined height by support legs (not shown), and is arranged side by side so as to form a floor surface of a room such as a clean room or a computer room. A free access floor is formed so that piping and wiring can be passed through the space between 2 and the underlying floor surface below.

  This conventional free access floor panel 2 is a die-cast product using an aluminum alloy as its material, and is integrally formed with a flat plate portion 4 forming the floor surface of the free access floor and a back surface side of the flat plate portion 4. A plurality of ribs 6 to be formed are provided. Each of the plurality of ribs 6 is formed to extend in length along the flat plate portion 4, and is arranged in a lattice shape as shown in FIG. The panel 2 is formed with such a plurality of ribs 6 so that its strength is improved.

  Next, FIG. 4 is a side sectional view showing a panel 10 for free access floor (hereinafter also referred to as panel 10) according to the second prior art (see, for example, Patent Document 1). Similar to the panel 2 according to the first prior art, the panel 10 according to the second prior art includes a flat plate portion 4 and a plurality of ribs 6.

  The flat plate portion 4 and the plurality of ribs 6 in the panel 10 according to the second prior art are integrally formed in the same manner as the panel 2 according to the first prior art, and the material thereof is aluminum. It is a die-cast product using an alloy. In the panel 10, a portion configured by including the flat plate portion 4 and the plurality of ribs 6 is referred to as a panel main body portion 12.

The second conventional panel 10 includes a reinforcing plate member 14. The reinforcing plate member 14 is formed by cutting a plate-like material made of an aluminum alloy into the same size as the flat plate portion 4 of the panel main body portion 12, and the surface on the panel main body portion 12 side is Each of the plurality of ribs 6 is in contact with the front end surface and fixed to the front end surface of the plurality of ribs 6 by adhesion or welding.
Japanese Utility Model Publication No. 63-94241

  However, in the free access floor panel 2 according to the first prior art, in order to improve the strength, the flat plate portion 4 of the panel 2 and the thickness of each of the plurality of ribs 6 are increased, Or the number of ribs 6 was increased. For this reason, there is a problem that the free access floor panel 2 according to the first prior art inevitably increases its weight and costs when it is attempted to improve its strength.

  However, as in the case of the panel 10 according to the second prior art, when the reinforcing plate member 14 is fixed to the front end surface of the rib 6 of the panel body 12 by bonding or welding, the first prior art is used. Like the panel 2, the strength of the flat plate portion 4 and the plurality of ribs 6 can be improved within a certain range without increasing the thickness of each rib 6 or increasing the number of ribs. Can do.

  However, in the panel 10 according to the second prior art, when the reinforcing plate member 14 is fixed to the front end surface of the rib 6 of the panel main body 12 by adhesion, both the reinforcing plate member 14 and the rib 6 are used. Are difficult to integrate with a larger (sufficient) strength exceeding the above-mentioned fixed range, and there is a problem that they are easily peeled off.

  Further, in the panel 10 according to the second prior art, the outer peripheral portion of the reinforcing plate member 14 is fixed to the tip end portion of the rib 6 arranged along the outer peripheral portion of the flat plate portion 4 of the panel main body portion 12 by welding. In this case, when both the reinforcing plate member 14 and the panel body 12 are made of a metal material mainly composed of aluminum, the metal mainly composed of aluminum has characteristics that are not suitable for welding work. Defects are likely to occur. For this reason, there is still a problem that it is difficult to integrate both the reinforcing plate member 14 and the rib 6 with the sufficient strength.

  As a result, in the panel 10 according to the second prior art, there is a limit to the improvement in strength by the reinforcing plate member 14. Since the thickness of each of the twelve flat plate portions 4 and the plurality of ribs 6 must be increased or the number of ribs 6 must be increased, the weight and cost of the panel main body portion 12 can be avoided. There was no problem.

  Therefore, in view of the above problems, the present invention can join the panel main body portion and the reinforcing plate member with sufficient strength, and can prevent weight increase and cost increase of the panel main body portion. It is an object of the present invention to provide an access floor panel.

In order to solve the above problems, the present invention
A panel body portion having a front plate portion and a plurality of ribs integrally formed with a height on the back side of the front plate portion;
A reinforcing plate member joined to the height end of the plurality of ribs,
The height tip of the rib and the reinforcing plate member are joined by friction stir welding means.

Moreover, the panel for free access floors by this invention is the following.
The panel main body and the reinforcing plate member are both made of the same material.

Moreover, the panel for free access floors by this invention is the following.
The same material is formed by the same manufacturing method.

Moreover, the panel for free access floors by this invention is the following.
The same material has the same composition.

Moreover, the panel for free access floors by this invention is the following.
The panel main body portion and the reinforcing plate member are formed of different materials.

Moreover, the panel for free access floors by this invention is the following.
The different materials are formed by different manufacturing methods.

Moreover, the panel for free access floors by this invention is the following.
The different materials have different compositions.

According to such a panel for a free access floor according to the present invention,
A panel body portion having a front plate portion and a plurality of ribs integrally formed with a height on the back side of the front plate portion;
A reinforcing plate member joined to the height end of the plurality of ribs,
Between the height tip of the rib and the reinforcing plate member is joined by friction stir welding means,
While being able to join between a panel main-body part and a reinforcement board member with sufficient intensity | strength, the weight increase and cost increase of a panel main-body part can be prevented.

Moreover, according to the panel for free access floors according to the present invention,
The panel body and the reinforcing plate member are both formed of the same material,
The joint strength between the panel main body and the reinforcing plate member can be reliably improved.

Moreover, according to the panel for free access floors according to the present invention,
The same material is formed by the same manufacturing method,
Again, the bonding strength between the panel main body and the reinforcing plate member can be reliably improved.

Moreover, according to the panel for free access floors according to the present invention,
The same material has the same composition,
Again, the bonding strength between the panel main body and the reinforcing plate member can be reliably improved.

Moreover, according to the panel for free access floors according to the present invention,
The panel body and the reinforcing plate member are made of different materials,
The range of materials that can be used for the panel main body or the reinforcing plate member can be expanded.

Moreover, according to the panel for free access floors according to the present invention,
The different materials are formed by different manufacturing methods,
The range of the manufacturing method of the material which can be used for a panel main-body part or a reinforcement board member can be expanded.

Moreover, according to the panel for free access floors according to the present invention,
The different materials have different compositions,
The range of the composition of the material that can be used for the panel main body or the reinforcing plate member can be expanded.

Hereinafter, the best mode for carrying out a panel for a free access floor according to the present invention will be specifically described with reference to the drawings.
FIG. 1 is a diagram referred to for explaining a free access floor panel 20 according to an embodiment of the present invention. The same parts as those in the prior art will be described using the same reference numerals, and overlapping description of the same parts as in the conventional art will be omitted as much as possible.

  As shown in FIG. 1, the free access floor panel 20 (hereinafter also referred to as the panel 20) according to the present embodiment has its reinforcing plate member 14 joined to the front ends of the plurality of ribs 6 in the panel body 12. Has been. And these two are joined by what is called friction stir welding means (Friction Stir Welding).

  Here, the friction stir welding means, for example, as described in Japanese Patent Nos. 2712838 and 2792233, is a substantially cylindrical portion and a screw rod shape protruding from the tip surface of the portion on the same axis. A tool having a protrusion (hereinafter referred to as a probe) is pressed substantially perpendicularly to the plane of the joining portion of the joining members or the vicinity thereof while rotating around the axis.

  At this time, the joining member is softened by frictional heat between the rotating probe and the joining member, and the probe enters the thickness of the softened joining member from its tip portion and rotates between the joining members. This means a joining means in which a plastic flow is generated by a stirring action by a probe to be integrated, and a structure of a joining portion between joining members is integrated by kneading and then solidified by a temperature drop.

  The friction stir welding operation between the rib 6 of the panel main body 12 and the reinforcing plate member 14 in the panel 20 is performed on the back side (panel main body portion) of the reinforcing plate member 14 on the side opposite to the panel main body 12. The probe tip of a rotating tool of a device (not shown) that performs friction stir welding is pressed against the position corresponding to the rib 6 on the (12 side), and this probe softens the reinforcing plate member 14 by heat, It sinks in the thickness of the reinforcing plate member 14 toward the rib 6, and then the probe of the tool moves along the length direction of the rib 6, so that the gap between the rib 6 and the reinforcing plate member 14 is reached. Friction stir welding is performed.

  The reinforcing plate member 14 may be joined over the entire length of the rib 6, or may be joined only at a plurality of locations along the length of the rib 6. Alternatively, the reinforcing plate member 14 may be joined only to any predetermined number of the plurality of ribs 6.

  Further, each of the panel main body 12 and the reinforcing plate member 14 in the panel 20 may be formed of the same metal material, or each of the panel main body 12 and the reinforcing plate member 14 is different from each other. It may be made of a material.

  Here, as an example in which each of the panel main body 12 and the reinforcing plate member 14 is formed of the same metal material, it is conceivable to use the same aluminum alloy for die casting. That is, when both the panel main body 12 and the reinforcing plate member 14 are the same die-casting aluminum alloy and are formed as a die-cast product using an aluminum alloy containing the composition components in the same ratio, these panel main bodies are used. It can be said that the portion 12 and the reinforcing plate member 14 are formed of the same metal material.

  For example, each of the panel main body portion 12 and the reinforcing plate member 14 of the panel 20 includes Si (silicon), Mg (magnesium), Mn (manganese), Cu (copper), a component added to aluminum as its material. Alternatively, an aluminum alloy containing any one or more of other components can be used.

  On the other hand, in the case where the same metal material is used for each of the panel main body 12 and the reinforcing plate member 14, it can also be formed using other metal materials such as steel materials other than aluminum alloys.

  Moreover, as an embodiment in which each of the panel main body 12 and the reinforcing plate member 14 is formed of different metal materials, of course, these metals are obviously different from each other such as aluminum and steel. Even when the materials are the same kind of metal, the case where the composition components are included in different ratios is also included.

  For example, even when both the panel body 12 and the reinforcing plate member 14 are manufactured from the same aluminum alloy, the panel body 12 is formed as a die cast product, and the reinforcing plate member 14 is rolled and manufactured. In the case of cutting and forming from a plate-shaped material, the ratio of the composition components will inevitably differ due to different manufacturing methods, so the panel body 12 and the reinforcing plate member 14 are: It can be said that different metal materials are used.

  As described above, according to the panel 20 according to the present embodiment, the friction stir welding is performed between the height front end portions of the plurality of ribs 6 of the panel main body portion 12 and the flat portion of the reinforcing plate member 14. Since it is joined by the means, the joining strength between the rib 6 and the reinforcing plate member 14 can be sufficiently improved as compared with welding or welding.

  That is, according to the panel 20 according to the present embodiment, as described above, the bonding strength between the plurality of ribs 6 of the panel body 12 and the reinforcing plate member 14 can be improved. Due to the force acting on the central portion of the flat plate portion 4 from above, the front ends of the ribs 6 arranged so as to face each other in the peripheral portion of the panel body portion 12 can be prevented from opening each other. Strength against bending load and the like can be improved.

  As described above, since the strength of the panel 20 can be improved, the thickness of each of the flat plate portion 4 and the plurality of ribs 6 of the panel main body portion 12 is increased, or the number of ribs 6 is increased. Therefore, it is possible to prevent the panel body 12 from being increased in weight and cost.

  Further, according to the panel 20 according to the present embodiment, when each of the panel main body portion 12 and the reinforcing plate member 14 is formed of the same metal material as described above, the friction stir welding means As a result, both materials are plastically softened and easily mixed, so that the bonding strength between the panel body 12 and the reinforcing plate member 14 can be reliably improved.

  Further, according to the panel 20 according to the present embodiment, even when each of the panel body 12 and the reinforcing plate member 14 is formed of metal materials having different meanings as described above, the friction stir welding is performed. Therefore, the range of materials that can be used for the panel body 12 or the reinforcing plate member 14 can be expanded.

  In the above-described embodiment, the case where the front end of the rib 6 of the panel main body 12 and the “plane portion” of the reinforcing plate member 14 are joined by the friction stir welding means has been described. If the reinforcing plate member 14 can come into contact with the height tip portion of the rib 6 without a gap, a “convex portion” formed on the height tip portion of the rib 6 and the flat portion of the reinforcing plate member 14 The “concave portion” or “through hole” may be joined by friction stir welding means.

It is side surface sectional drawing which shows the panel 20 for free access floors concerning one embodiment of this invention. It is a top view which shows the panel 2 for free access floors concerning a 1st prior art. FIG. 3 is a cross-sectional view of the free access floor panel 2 shown in FIG. It is side surface sectional drawing which shows the panel 10 for free access floors concerning a 2nd prior art.

Explanation of symbols

2 Free Access Floor Panel 4 Flat Plate 6 Rib 10 Free Access Floor Panel 12 Panel Main Body 14 Reinforcement Plate Member 20 Free Access Floor Panel

Claims (7)

A panel body portion having a front plate portion and a plurality of ribs integrally formed with a height on the back side of the front plate portion;
A reinforcing plate member joined to the height end of the plurality of ribs,
A panel for a free access floor, characterized in that a front end of the height of the rib and the reinforcing plate member are joined by friction stir welding means.   The panel for a free access floor according to claim 1, wherein the panel main body and the reinforcing plate member are both made of the same material.   The free access floor panel according to claim 2, wherein the same material is formed by the same manufacturing method.   The free access floor panel according to claim 2, wherein the same material has the same composition.   The panel for a free access floor according to claim 1, wherein the panel body and the reinforcing plate member are formed of different materials.   The panel for a free access floor according to claim 5, wherein the different materials are formed by different manufacturing methods.   The panel for a free access floor according to claim 5, wherein the different materials have different compositions.

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