JP2010043449A - Panel for free-access floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel for a free-access floor, which can enhance the strength and rigidity of the whole panel, and which can prevent an increase in the weight and cost of a 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 a reinforcing plate member 21 which is joined to a leading end of the first rib 6a, formed on the outermost peripheral side of the panel body portion 12, among the plurality of ribs 6; and a leading end of the first rib 6a and the reinforcing plate member 21 are joined together with a frictional agitating joint means. The strength and rigidity of the whole panel for the free-access floor can be enhanced, 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.

  14 and 15 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 formed ribs 6 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. 16 is a side cross-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 an aluminum alloy plate-like material into a slightly smaller size than the flat plate portion 4 of the panel main body portion 12, and the surface on the panel main body portion 12 side. Are fixed to the respective tip surfaces 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.

  Further, 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 adhesion 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, the reinforcing plate member 14 is easily peeled off. There has been a problem that it is difficult to improve the strength and rigidity of the entire panel by joining both the rib 14 and the rib 6 with a larger (sufficient) strength that exceeds the above-mentioned fixed range.

  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 a problem that it is difficult to improve the strength and rigidity of the entire panel by joining both the reinforcing plate member 14 and the rib 6 with 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 provides a panel for a free access floor that can improve the strength and rigidity of the entire panel and can prevent an increase in the weight and cost of the panel body. Is an issue.

In order to solve the above problems, a panel for a free access floor according to the present invention is:
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;
Among the plurality of ribs, a reinforcing plate member joined to the tip end portion of the first rib formed on the outermost peripheral side of the panel main body portion,
The tip end portion of the first 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 reinforcing plate member has notches formed at four corners.

Moreover, the panel for free access floors by this invention is the following.
The plurality of ribs include a second rib formed so as to extend in a direction parallel to the side of the front plate portion in an inner region of the first rib.
At least one or more tip portions of the second ribs and the reinforcing plate member are joined to each other.

Moreover, the panel for free access floors by this invention is the following.
The plurality of ribs include a third rib formed to extend in a direction inclined at a predetermined angle with a side of the front plate portion in an inner region of the first rib,
At least one or more tip portions of the third ribs and the reinforcing plate member are joined together.

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;
Among the plurality of ribs, a reinforcing plate member joined to the tip end portion of the first rib formed on the outermost peripheral side of the panel main body portion,
The tip of the first rib and the reinforcing plate member are joined by friction stir welding means,
The overall strength and rigidity of the panel can be improved, and the weight and cost of the panel body can be prevented.
In particular, when the reinforcing plate member is bonded only to the other ribs in the inner region of the first rib by bonding the reinforcing plate member to the tip of the first rib formed on the outermost peripheral side of the panel main body. Compared to the above, the strength and rigidity of the entire panel can be greatly improved.

Moreover, according to the panel for free access floors according to the present invention,
By forming notches at the four corners of the reinforcing plate member,
Since the lower surface of the four corners of the panel body can be in direct contact with the support surface of the panel support, the four corners of the panel body can be supported on the support surface of the panel support with high accuracy.

Moreover, according to the panel for free access floors according to the present invention,
The plurality of ribs include a second rib formed so as to extend in a direction parallel to the side of the front plate portion in an inner region of the first rib.
By joining at least one tip of the second rib and the reinforcing plate member,
In addition to joining the reinforcing plate member to the tip end portion of the first rib formed on the outermost peripheral side of the panel main body portion, at least one tip end portion of the second rib and the reinforcing plate member are provided. Since it is joined, the strength and rigidity of the entire panel can be further improved as compared with the case where the reinforcing plate member is simply joined to the tip of the first rib.

Moreover, according to the panel for free access floors according to the present invention,
The plurality of ribs include a third rib formed to extend in a direction inclined at a predetermined angle with a side of the front plate portion in an inner region of the first rib,
By joining at least one tip of the third rib and the reinforcing plate member,
In addition to joining the reinforcing plate member to the tip end portion of the first rib formed on the outermost peripheral side of the panel main body portion, at least one tip end portion of the third rib and the reinforcing plate member are provided. Since it is joined, the strength and rigidity of the entire panel can be further improved as compared with the case where the reinforcing plate member is simply joined to the tip of the first rib.

  Hereinafter, the best mode for carrying out the panel for a free access floor according to the present invention will be specifically described with reference to the drawings.

  In the following, since the present invention has a large number of embodiments, each of the plurality of embodiments, including overlapping ones, will be described separately for each group having a common point to each other. To do.

  FIGS. 1 to 3 are views referred to for explaining a free access floor panel 20 according to a first example of the first embodiment of the present invention. The same parts as those of the free access floor panel 10 according to the second prior art will be described using the same reference numerals, and overlapping description of the same configuration as the conventional one 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 is reinforced to be joined to the panel body 12 and the lower portions of the plurality of ribs 6. A plate member 21 is provided. The reinforcing plate member 21 has a planar shape that is the same quadrangle as the flat plate portion 4 (front plate portion) of the panel main body 12, and is a plane that is slightly smaller than the flat shape of the flat plate portion 4. It has a shape.

As shown in FIG. 1, the reinforcing plate member 21 is in contact with all of the plurality of ribs 6 on the panel main body 12 side surface, but as shown in FIG. Among these ribs 6, tips of four ribs 6 (hereinafter referred to as first ribs 6 a) arranged on the outermost peripheral side of the quadrilateral of the flat plate portion 4 and formed along each side of the quadrilateral. It is joined to the part.
The joining at this time is joined by a 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 protruding portion (hereinafter referred to as a probe) is pressed substantially perpendicularly to the surface corresponding to the bonding portion of the bonding members or the surface in the vicinity thereof while rotating around the axis.

  At this time, the frictional heat between the rotating probe and the joining member softens the joining member just before liquefaction, and the probe enters the thickness of the softened joining member from its tip, A joining means in which plastic flow is generated by an agitating action by a probe rotating between members, and is integrated by kneading the structure of the joint portion between the joining members, and then solidified by a temperature drop.

  The friction stir welding operation between the first rib 6a of the panel body 12 and the reinforcing plate member 21 in the panel 20 is performed on the back side of the reinforcing plate member 21 on the plane opposite to the panel body 12 ( A probe tip of a rotating tool of a device (not shown) that performs friction stir welding is pressed to a position corresponding to the first rib 6a on the panel main body 12 side.

  The probe softens the reinforcing plate member 21 by heat as described above, proceeds toward the first rib 6a, penetrates the thickness of the reinforcing plate member 21, and the probe tip is the first rib. It also sinks into the tip of 6a and softens that part to the point before liquefaction. Thereafter, the probe is moved along the length direction of the first rib 6a, whereby the friction stir welding between the first rib 6a and the reinforcing plate member 21 is performed.

  In FIG. 3, the reinforcing plate member 21 of the panel 20 is actually joined to the outermost first rib 6 a (not shown) of the flat plate portion 4 in the panel main body 12 at the planar peripheral portion. It is the bottom view of the panel 20 which showed the part of the joining area | region and showed this by hatching. The shape of such a joining area | region is along the position and length of the outermost four 1st rib 6a in the flat plate part 4 of the panel main body part 12 shown in FIG. Are formed in the shape of a band constituting each of the four sides of the quadrilateral.

  In addition, in FIG. 3, about the solid line and broken line (refer FIG. 2) which show the outline of the 1st rib 6a of the outermost periphery in the flat plate part 4 of the panel main-body part 12, and each of several other ribs 6 (refer FIG. 2), It is not shown in order to prevent the drawing from becoming complicated.

  According to the free access floor panel 20 of the first example according to the first embodiment of the present invention, the reinforcing plate member 21 is the first rib on the outermost periphery of the panel body 12. In the joining region shown by hatching in FIG. 3, the strength and rigidity of the entire panel 20 can be improved and the weight of the panel main body 12 can be improved. And cost increase can be prevented.

  In particular, by joining the reinforcing plate member 21 to the tip end portion of the first rib 6a formed on the outermost peripheral side of the panel main body 12, the reinforcing plate member 21 is connected to other ribs in the inner region of the first rib 6a. Compared with the case where only 6 is joined, the strength and rigidity of the entire panel can be greatly improved.

  Next, FIG.4 and FIG.5 is the panel for free access floors of the 2nd-20th Example including the panel 20 of the above-mentioned 1st Example based on the 1st Embodiment of this invention. It is a list figure referred in order to demonstrate about 22-40. Each of these figures corresponds to FIG. 3 referred to when the panel 20 of the first embodiment described above is described.

  In FIG. 4 and FIG. 5, in the parentheses attached to the upper left side of each of these lists, two numbers written with a hyphen in between are the numbers on the front side of the hyphen correspond to the embodiment of the present invention. The numbers from 1 to 20 on the back side of the hyphen are serial numbers assigned to each of the embodiments. For example, the notation [1-2] indicates that the figure relates to the first embodiment and is the panel of the second embodiment.

  Hereinafter, the same notation is also applied to the panels of the respective examples according to the second to fourth embodiments.

  In the panel 20 of the first example according to the first embodiment, denoted as [1-1] in FIG. 4, as shown in FIG. Only the outermost first rib 6a (not shown) of the panel main body 12 arranged on the back side of the figure is joined in this hatching region.

  As shown in FIGS. 4 and 5, in the panels 22 to 40 of the second to twentieth examples [1-2] to [1-20] according to the first embodiment, the reinforcing plate The member 21 is common in that it is joined to the outermost first rib 6a (not shown) of the panel main body 12, but is formed inside the outermost first rib 6a. Each of the embodiments is different from the panel 20 of the first embodiment in that the other ribs 6 (not shown) are also joined in the hatched region in the drawing.

  Further, each of the panels 22 to 40 of the second to twentieth examples according to the first embodiment is arranged in the vertical direction, the horizontal direction, or the diagonal direction on the plane of the reinforcing plate member 21. On the back side in the figure of the region other than the region (joining region) shown by the band-like hatching, which is formed so as to be extended or formed in an annular shape continuously in the circumferential direction, the panel body 12 Whether or not the other ribs 6 are formed may be either, but it is assumed that the ribs 6 corresponding to the hatching are always arranged on the back side of the belt-like region shown by hatching in the drawing.

  According to the second to twentieth examples [1-2] to [1-20] free access floor panels 22 to 40 according to the first embodiment of the present invention as described above, Similar to the free access floor panel 20 of the first example [1-1] according to the present embodiment, the reinforcing plate member 21 is provided on the outermost first rib 6 a of the panel body 12. Since it is joined by the friction stir welding, the strength and rigidity of the entire panel can be improved, and the weight and cost of the panel body 12 can be prevented.

  Further, according to the panels 22 to 40 of the second to twentieth examples according to the present embodiment, the reinforcing plate member 21 is the outermost periphery of the plurality of ribs 6 of the panel body 12. Not only to the first rib 6a, but also to the other ribs 6 formed on the inner side of the outermost first rib 6a in the various joint regions by the friction stir welding. Therefore, the strength and rigidity of the entire panel can be further improved as compared with the case where the reinforcing plate member 21 is merely joined to the tip end portion of the first rib 6a.

  Next, FIG.6 and FIG.7 is a figure referred in order to demonstrate the panel 50 for free access floors of the 1st Example based on the 2nd Embodiment of this invention. The same reference numerals are used for the same parts as the free access floor panel 20 of the first example according to the first embodiment, and the duplicate description of the same configuration is omitted as much as possible. To do.

  The free access floor panel 50 of the first example (hereinafter also referred to as the panel 50) according to the second embodiment is similar to the free access floor panel of each of the above examples. A main body 12 and a reinforcing plate member 51 are provided.

  As shown in FIG. 6, the reinforcing plate member 51 of the panel 50 has first corners formed at the four corners of the flat plate portion 4 of the panel main body portion 12, that is, the outermost peripheral side of the flat plate portion 4. Cutouts 51a are formed at the four corners of the reinforcing plate member 51 corresponding to the four corners of the rib 6a.

  That is, the reinforcing plate member 51 of the panel 50 is a square whose planar shape is slightly smaller than the flat plate portion 4 of the panel main body portion 12, and the first rib is formed at each of the four corners of the square. A notch 51a is formed in a shape in which small squares corresponding to the four corners of 6a are cut off.

  For this reason, only the four corners of the first rib 6a formed on the outermost peripheral side of the flat plate portion 4 of the panel body 12 are not covered with the reinforcing plate member 51, and the front side in FIG. Is exposed on the base concrete floor side).

  When the panel 50 is an aluminum die-cast panel, for example, in FIG. 6, the mounting portions 6 e shown by the L-shaped portions with diagonal lines of the ribs 6 a at the four corners of the panel main body 12 are the support planes of the panel support adjustment base. 6 so that the height of the mounting portion 6e slightly protrudes toward the front side in FIG. 6 (the base floor surface side at the time of installation) than the height of the ribs 6 in other portions. It is made high. In order to stably place the four corners of the panel on the support plane portion of the panel support adjustment table, the placement portion 6e needs to have flatness, and the placement portion 6e is generally machined. Is given.

  For this reason, since the flatness of the placement portion 6e described above may be lost due to processing for joining the reinforcing plate member 51 to the rib, such as welding, for example, swells, this may be lost. In order to prevent this, the reinforcing plate member 51 avoids the mounting portion 6e, and cutout portions 51a are formed at the four corners of the reinforcing plate member 51.

  FIG. 7 is a bottom view of the panel 50 showing the joining region between the reinforcing plate member 51 and the first rib 6a in the panel main body 12, and this is shown by hatching. The reinforcing plate member 51 is joined to the first rib 6a of the panel body 12 over the entire length of the outer periphery. In FIG. 7, the four corners of the first rib 6a and the other ribs 6 are omitted in order to clarify the joining region indicated by hatching in the drawing.

  According to the panel 50 of the first example according to the second embodiment of the present invention, the reinforcing plate member 51 is the outermost outer periphery of the plurality of ribs 6 in the panel body 12. In the joining region shown by hatching in FIG. 7 with respect to the first rib 6a, it is joined by the friction stir welding, so that the strength and rigidity of the entire panel can be improved, and the weight of the panel body 12 is increased. And an increase in cost can be prevented.

  In particular, the reinforcing plate member 51 is joined to the tip end portion of the first rib 6a formed on the outermost peripheral side of the panel main body portion 12 so that the reinforcing plate member 51 is placed in the other area inside the first rib 6a. Compared with the case where only the rib 6 is joined, the strength and rigidity of the whole panel can be greatly improved.

  Further, according to the panel 50 of the present embodiment, since the notch portions 51a are formed at the four corners of the reinforcing plate member 51, the reinforcing plate member 51 is joined to the rib 6a, for example, the joining portion is raised like welding. By the processing for the purpose, it is possible to prevent the possibility that the flatness of the placement portion 6e described above is lost.

  Next, FIG. 8 shows the second to tenth embodiments [2-2] including the panel 50 of the above-described first embodiment [2-1] according to the second embodiment of the present invention. To [2-10] free access floor panels 55 to 63 for reference.

  As shown in FIG. 8, in the panels 55 to 63 of the second to tenth examples according to the second embodiment, the reinforcing plate member 51 is the first plate according to the present embodiment described above. Similar to the panel 50 of the embodiment, the first rib 6a (not shown in FIG. 8) of the panel body 12 is joined to the first rib 6a similar to the first rib 6a shown in FIG. It is joined not only to 6a but also to the other ribs 6 inside thereof.

  According to the second to tenth embodiments [2-2] to [2-10] of the panels 55 to 63 according to the second embodiment of the present invention, the present embodiment described above is used. In the same manner as the panel 50 of the first embodiment [2-1], the reinforcing plate member 51 is provided on the outermost first rib 6a among the plurality of ribs 6 in the panel body 12. In various joining regions, since the joining is performed by the friction stir welding, the strength and rigidity of the entire panel can be improved, and the weight and cost of the panel body 12 can be prevented.

  Further, according to the panels 55 to 63 of the second to tenth examples according to the second embodiment, similarly to the panel 50 of the first example according to the present embodiment described above, Since the notches 51a (the reference numerals are not shown in FIG. 8) are formed at the four corners of the reinforcing plate member 51, the reinforcing plate member 51 is joined to the rib 6a, for example, the joining portion is raised like welding. Therefore, it is possible to prevent the flatness of the placement portion 6e from being lost.

  Further, according to the panels 55 to 63 of the second to tenth examples according to the present embodiment, the reinforcing plate member 51 is against the outermost first rib 6 a of the panel body 12. In addition, since the other ribs 6 formed inside the first rib 6a are joined by the friction stir welding in various joining regions, the reinforcing plate member 51 is attached to the first rib 6a. The strength and rigidity of the entire panel can be further improved as compared with the case where it is merely joined to the tip of the rib 6a.

  Next, FIGS. 9 to 11 show free access floor panels 71 to 91 according to the first to twenty-first examples [3-1] to [3-21] according to the third embodiment of the present invention. It is a list figure referred in order to explain about.

  Each of the panels 71 to 91 of the first to twenty-first examples according to the third embodiment is a part of the panel of each example according to the first or second embodiment described above. Although overlapped with each other, the following description will be given again in order to clarify the structures that are characteristic of the various panels according to the present embodiment. The description of the same configuration as that already described in the description of each example according to the first and second embodiments will be omitted as much as possible.

  As shown in FIGS. 9 to 11, in each of the panels 71 to 91 of the first to twenty-first examples according to the third embodiment, the hatching region on the reinforcing plate member 21 or 51 is shown. As a part of the plurality of ribs 6 (not shown) of the panel body 12 formed on the back side, the first outermost rib 6a among the plurality of ribs 6 (see FIGS. 2 and 6). A rib 6 (not shown) (corresponding to a second rib) extending in a direction parallel to any of the four sides of the flat plate portion 4 of the panel main body portion 12 is formed in the inner region of.

  That is, in each of the panels 71 to 91 of the first to twenty-first examples according to the third embodiment, the first outermost rib among the plurality of ribs 6 in the panel main body 12. 6a (see FIG. 2 and FIG. 6) is formed so that all or part of the rib 6 formed in the inner region extends in a direction parallel to any one of the four sides of the flat plate portion 4 of the panel body portion 12. ing.

  In each of the panels 71 to 85 of the first to fifteenth embodiments [3-1] to [3-15], the reinforcing plate member 21 (see FIG. 2) has the outermost outer periphery. In the inner region of one rib 6a, it is also joined to at least one of the ribs 6 formed to extend in a direction parallel to any of the four sides of the flat plate portion 4. .

  Further, in each of the panels 86 to 91 of the sixteenth to twenty-first embodiments [3-16] to [3-21], the reinforcing plate member 51 having the notches 52 (see FIG. 6) at the four corners. In the inner region of the outermost first rib 6a, at least one of the ribs 6 formed so as to extend in a direction parallel to any of the four sides of the flat plate portion 4 is provided. Is also bonded to.

  According to the first to twenty-first examples [3-1] to [3-21] of the panels 71 to 91 according to the third embodiment of the present invention, the reinforcing plate member 21 or 51 is a rib formed not only to the outermost first rib 6a of the panel main body 12 but also to extend in parallel with any of the four sides of the flat plate portion 4 of the panel main body 12 on the inner side. 6, at least one or more ribs 6 are also joined by the friction stir welding in various joining regions, so that the reinforcing plate member 21 or 51 is attached to the tip of the first rib 6 a. The strength and rigidity of the entire panel can be further improved as compared with the case where the panel is simply joined.

  Next, FIG. 12 and FIG. 13 show free access floor panels 101 to 113 of the first to thirteenth embodiments [4-1] to [4-13] according to the fourth embodiment of the present invention. It is a list figure referred in order to explain about.

  Each of the panels 101 to 113 of the first to thirteenth examples according to the fourth embodiment is the same as one or more of the first and second embodiments described above. Although it overlaps with a part of panels of each of the examples, the following description will be given again in order to clarify the characteristic configuration of the various panels according to the present embodiment. The description of the same configuration as that already described for the panel of each example according to the first and second embodiments will be omitted as much as possible.

  As shown in FIGS. 12 and 13, in each of the panels 101 to 113 of the first to thirteenth examples according to the fourth embodiment, the hatching region on the reinforcing plate member 21 or 51 is shown. Of the plurality of ribs 6 (not shown) in the panel main body 12 formed on the back side, the panel main body 12 has a region inside the outermost first rib 6a (see FIGS. 2 and 6). A rib 6 (not shown) (corresponding to a third rib) extending in a direction parallel to one of the diagonal lines of the flat plate portion 4 (a direction inclined at a predetermined angle with each side of the flat plate portion 4) is formed. Yes.

  That is, in each of the panels 101 to 113 of the first to thirteenth embodiments, the outermost first rib 6a among the plurality of ribs 6 in the panel main body 12 (see FIGS. 2 and 6). All or part of the ribs 6 formed in the inner region of the panel body 12 are formed so as to extend in a direction parallel to any one of the diagonal lines of the flat plate portion 4 of the panel main body portion 12.

  In each of the panels 101 to 109 of the first to ninth embodiments [4-1] to [4-9], the reinforcing plate member 21 is the first outermost rib of the panel body 12. In the inner region of 6a, it is joined also to at least one rib 6 among the ribs 6 formed so as to extend in a direction parallel to any one of the diagonal lines of the flat plate portion 4. .

  Further, in each of the panels 110 to 113 of the tenth to thirteenth embodiments [4-10] to [4-13], the reinforcing plate member 51 having notches 51a (see FIG. 6) at the four corners. At least one of the ribs 6 formed so as to extend in a direction parallel to one of the diagonal lines of the flat plate portion 4 in the inner region of the outermost first rib 6a of the panel body portion 12. It is joined also to two or more ribs 6.

  According to the first to thirteenth examples [4-1] to [4-13] of the panels 101 to 113 according to the fourth embodiment, the reinforcing plate member 21 or 51 is Not only with respect to the outermost first rib 6a of the panel main body part 12, but also within any one of the diagonal lines of the flat plate part 4 of the panel main body part 12 inside the first outermost rib 6a. Among the ribs 6 formed so as to extend in the parallel direction, at least one or more ribs 6 are also joined by the friction stir welding in various joining regions. The strength and rigidity of the entire panel can be further improved as compared with the case where the first rib 6a is merely joined to the tip portion.

  In each of the panels of each example according to each of the above embodiments, the reinforcing plate member 21 or 51 and the outermost first rib 6a and other ribs 6 of the panel body 12 are Although it joined continuously in the direction where a rib extends, it may join intermittently in the direction where a rib extends. In such a case, the joining portion may be joined by a spot-like joining region.

  Further, in each of the panels of each example according to each of the above embodiments, the ribs 6 in the panel main body 12 are all formed to have the same height, but the reinforcing plate member 21 or 51 The ribs that are not joined to each other may be formed to have a lower height than the ribs 6 that are joined.

  Further, in the panel 50 of the first example according to the second embodiment shown in [2-1] in FIG. 8, as shown in FIG. The first outermost rib 6a has ribs 6a having mounting portions 6e at the four corners thereof, and notches are not formed. Depending on the support type, notches may be formed at the four corners of the outermost first rib 6a. In this case, only the four corners of the flat plate portion 4 are present in the panel main body 12, Only the four corners of the flat plate portion 4 may be supported by the support legs.

  Further, the panels 55 to 63 of the second to tenth examples [2-2] to [2-10] according to the second embodiment may be the same as described above.

  In addition, the panels 101 to 113 of the first to thirteenth examples according to the fourth embodiment have ribs 6 extending in a direction parallel to any of the diagonal lines of the flat plate portion 4. However, when the flat plate portion 4 is square, the diagonal line has ribs 6 extending in a direction inclined at an angle of 45 ° with respect to each side of the flat plate portion 4. However, the rib 6 may extend in a direction inclined at an angle other than 45 °.

  Further, in each of the examples according to the third and fourth embodiments, the reinforcing plate member 21 or 51 is parallel to not only the first rib 6 a but also any one of the four sides of the flat plate portion 4. Of the second ribs 6 formed so as to extend in the direction, and a direction parallel to one of the diagonal lines of the flat plate portion 4 and the “at least one or more” ribs 6 In the third rib 6 formed so as to extend in the direction described above, the case of joining also to “at least one or more” ribs 6 has been described, but the number of the second and third ribs 6 is small. In this case, “all” second and third ribs 6 may be joined.

It is side surface sectional drawing which shows the panel 20 for free access floors of the 1st Example based on the 1st Embodiment of this invention. It is a bottom view which shows the panel 20 for free access floors in FIG. It is a bottom view which shows the joining area | region of the panel 20 for free access floors in FIG. The joining area | region of the panels 20 and 22-30 for the free access floors of the examples [1-1] to [1-10] of the first to tenth embodiments according to the first embodiment of the present invention is shown. It is a bottom view. The bottom view which shows each joining area | region of the panels 31 to 40 for free access floors of the 11th to 20th Examples [1-11] to [1-20] according to the first embodiment of the present invention. It is. It is a bottom view which shows the panel 50 for free access floors of the 1st Example based on the 2nd Embodiment of this invention. It is a bottom view which shows the joining area | region of the panel 50 for free access floors in FIG. The bottom view which shows the joining area | region of the panels 50 for free access floors of the 1st-10th Example [2-1] to [2-10] and 55-63 based on the 2nd Embodiment of this invention. It is. It is a bottom view which shows the joining area | region of the panels 71-77 for free access floors of the 1st-7th Example [3-1] to [3-7] based on the 3rd Embodiment of this invention. . It is a bottom view which shows the joining area | region of the panels 78-84 for free access floors of the 8th to 14th Examples [3-8] to [3-14] based on the 3rd Embodiment of this invention. . It is a bottom view which shows the joining area | region of the panels 85 to 91 for free access floors of the 15th to 21st Example [3-15] to [3-21] based on the 3rd Embodiment of this invention. . It is a bottom view which shows the joining area | region of the panels 101-107 for the free access floors of the 1st-7th Example [4-1] to [4-7] based on the 4th Embodiment of this invention. . It is a bottom view which shows the joining area | region of the panels 108 to 113 for free access floors of the 8th to 13th examples [4-8] to [4-13] according to the fourth embodiment of the present invention. . It is a top view which shows the panel 2 for free access floors concerning a 1st prior art. It is AA arrow sectional drawing of the panel 2 for free access floors 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 portion 4a Fitting hole 6 Rib 6a First rib 6e Placement portion 10 Free access floor panel 12 Panel body portion 14 Reinforcing plate members 20, 22 to 40, 50, 55 to 63, 71 to 91, 101 to 113 Free access floor panel 21, 51 Reinforcing plate member 51a Notch

Claims (4)

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;
Among the plurality of ribs, a reinforcing plate member joined to the tip end portion of the first rib formed on the outermost peripheral side of the panel main body portion,
The free access floor panel, wherein a tip end portion of the first rib and the reinforcing plate member are joined by friction stir welding means. The notch part is formed in the four corners of the said reinforcement board member. The panel for free access floors of Claim 1 characterized by the above-mentioned. The plurality of ribs include a second rib formed so as to extend in a direction parallel to the side of the front plate portion in an inner region of the first rib.
The free access floor panel according to claim 1 or 2, wherein at least one or more tip ends of the second ribs and the reinforcing plate member are joined. The plurality of ribs include a third rib formed to extend in a direction inclined at a predetermined angle with a side of the front plate portion in an inner region of the first rib,
The panel for a free access floor according to any one of claims 1 to 3, wherein at least one or more tip ends of the third ribs and the reinforcing plate member are joined.

Images