JP2019206874A - Free access floor - Google Patents

Abstract

To provide a free access floor capable of using a panel with high intensity and high rigidity in a part of a floor surface.SOLUTION: A free access floor comprises a plurality of support members disposed on a base floor, and a plurality of first and second panels placed on the plurality of support members. The first panel comprises a plate part configuring a flat upper surface, and a plurality of ribs protruding from a lower surface of the plate part and intersecting one another. The second panel comprises a base panel having a plate part and a plurality of ribs, a stiffening plate having a thickness of 5 mm or more superposed on the entire surface of the base panel to configure a floor surface, and a fixing part for fixing the stiffening plate to the base panel. The height from the base floor to the floor surface by the upper surface of the first panel and the height from the base floor to the floor surface by the stiffening plate of the second panel are the same.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a free access floor in which a space is formed on a foundation floor to form a floor surface.

  Conventionally, by placing a plurality of floor panels on a plurality of support members arranged on a foundation floor and forming the floor surface with the floor panels, a space for accommodating power cords and communication cables of various devices is defined as a floor surface. A free access floor provided between the base floor and the base floor is known (Patent Document 1). Since heavy objects such as racks and manufacturing equipment equipped with devices such as computers are placed on the floor panel, it is necessary to increase the strength and rigidity of the floor panel. The floor panel of the free access floor disclosed in Patent Document 1 includes a panel main body portion in which a plurality of ribs protrude from the lower surface of the front plate portion constituting the floor surface, and a reinforcement bonded to the lower ends of the ribs of the panel main body portion. And a board. This reinforcing plate increases the strength and rigidity of the floor panel.

JP 2010-043448 A

  However, in the conventional technology described above, the floor panels with higher strength and higher rigidity than the panel body alone are heavy. Therefore, if all floor panels are made with high strength and high rigidity, the floor panel will be used when constructing the free access floor. The burden on the worker who lays the panel is increased, which is not preferable.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a free access floor in which a high-strength and high-rigidity panel can be used as a part of the floor surface.

  In order to achieve this object, a free access floor according to the present invention includes a plurality of support members disposed on a base floor, and a plurality of first panels and second panels respectively mounted on the plurality of support members, The first panel includes a plate portion forming a flat upper surface and a plurality of ribs protruding from the lower surface of the plate portion and intersecting with each other, and the second panel includes a base having the plate portion and the plurality of ribs. A panel, a reinforcing plate having a thickness of 5 mm or more that forms a floor surface overlaid on the entire surface of the base panel, and a fixing portion that fixes the reinforcing plate to the base panel. The height from the foundation floor to the floor surface by the upper surface is the same as the height from the foundation floor to the floor surface by the reinforcing plate of the second panel.

  According to the free access floor of claim 1, the second panel has a reinforcing plate having a thickness of 5 mm or more over the entire surface of the base panel having the plate portion and the plurality of ribs, and the reinforcing plate serves as a base by the fixing portion. Fixed to the panel. Thereby, the intensity | strength and rigidity of a 2nd panel can be made high. Furthermore, the height from the foundation floor to the floor surface by the upper surface of the plate portion of the first panel is the same as the height from the foundation floor to the floor surface by the reinforcing plate of the second panel. Thereby, even if the reinforcing panel is overlapped on the base panel having the same configuration as that of the first panel to form the second panel, it is difficult to cause a step at the boundary between the first panel and the second panel. Therefore, it is possible to use a high-strength and high-rigidity second panel on a part of the floor surface while making it difficult for a step to occur at the boundary between the first panel and the second panel.

  According to the free access floor of the second aspect, the adjacent first panel and second panel are placed on the mounting portion of the support member. The height of the part on which the first panel is placed from the base floor is the same as the height of the part on which the second panel is placed from the base floor. And the thickness of the part mounted in a mounting part among base panels is smaller by the thickness of a reinforcement board than the thickness of the part mounted in a mounting part among 1st panels. Accordingly, when the second panel in which the reinforcing plate is superimposed on the base panel is placed on the placement portion, and the first panel adjacent to the second panel is placed on the same placement portion, the floor surface of the first panel is The height and the height of the floor surface of the second panel can be made the same with a simple configuration. As a result, in addition to the effect of the first aspect, it is possible to easily form a high-strength and high-rigidity second panel that hardly causes a step at the boundary with the first panel.

  According to the free access floor of the third aspect, the base panel is obtained by removing the portion of the first panel that is placed on the mounting portion from the lower side by the thickness of the reinforcing plate. In this manner, the height of the floor surface of the second panel and the height of the floor surface of the first panel can be easily matched while forming the base panel by a slight process on the first panel. As a result, in addition to the effect of the second aspect, it is possible to more easily form a high-strength and high-rigidity second panel that hardly causes a step at the boundary with the first panel.

  According to the free access floor of Claim 4, the height of the rib of the 1st panel of the part mounted in a mounting part is more than the thickness of a reinforcement board. Therefore, the base panel in which the plate portion does not interfere with the placement portion can be easily formed by removing the rib of the first panel at the portion placed on the placement portion by the thickness of the reinforcing plate. As a result, in addition to the effect of the third aspect, it is possible to more easily form a high-strength and high-rigidity second panel that hardly causes a step at the boundary with the first panel.

  According to the free access floor of the fifth aspect, the support member includes the protruding portion that protrudes upward from the placement portion and is disposed between the ribs. The height of the rib of the 1st panel of the part mounted in a mounting part is more than the total value of the thickness of a reinforcement board, and the height of a protrusion part. Therefore, the base panel where the plate part does not interfere with the protruding part can be easily formed without removing the rib of the first panel at the portion to be placed on the placement part by the thickness of the reinforcing plate and removing a part of the plate part. it can. As a result, in addition to the effect of the fourth aspect, it is possible to further easily form a high-strength and high-rigidity second panel that hardly causes a step at the boundary with the first panel.

  According to the free access floor of claim 6, the fixing portion is inserted into a through-hole penetrating the base panel and the reinforcing plate in the plate thickness direction, and is fixed in a shaft shape to fix the base panel and the reinforcing plate to the support member. It is a member. In a state where the fastening member is removed, the base panel and the reinforcing plate are not fixed, so that the base panel and the reinforcing plate can be handled separately such as during construction or dismantling of the free access floor. As a result, in addition to the effect of any one of claims 1 to 5, it is possible to reduce the burden on an operator who has a base panel and a reinforcing plate, such as when constructing or dismantling a free access floor.

It is a perspective view of the free access floor in one embodiment. It is sectional drawing of the free access floor in the II-II line of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. A free access floor 1 according to an embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of the free access floor 1. FIG. 2 is a sectional view of the free access floor 1 taken along the line II-II in FIG. In FIG. 1, for ease of understanding, one of the plurality of support members 10 and one of the four first panels 20 and the second panel 25 supported by the one support member 10 are included. It is shown in the figure. Further, in FIG. 2, a sectional view of the support member 10 is omitted, and a front view of the support member 10 is illustrated.

  As shown in FIGS. 1 and 2, the free access floor 1 includes a plurality of support members 10 arranged on a foundation floor (not shown), and is supported from below by the plurality of support members 10 to form a floor surface 4. A plurality of first panels 20 and second panels 25 are provided. The free access floor 1 is for forming a space between the first panel 20 and the second panel 25 constituting the floor surface 4 and the foundation floor. In this space, power cords, communication cables, air conditioning pipes, and the like of various devices placed on the floor surface 4 are accommodated.

  The support member 10 is connected to a support leg 11 fixed to the foundation floor, a nut 13 screwed to the male screw 12 of the support leg 11, a cylinder body 14 placed on the nut 13, and an upper end of the cylinder body 14. And a projecting portion 16 projecting upward from the placing portion 15. Such support members 10 are arranged at positions where the corners of the four first panels 20 and the second panels 25 in total, that is, at the four corners of the first panel 20 and the second panel 25.

  The cylindrical body 14 is a part into which a part of the support leg 11 is inserted, and a set screw 14a passes through a part in the radial direction. The placement part 15 is a part having a square shape when viewed from above. A total of four corners of the first panel 20 and the second panel 25 are placed on the placement surface 15 a formed by the upper surface of the placement unit 15. The placement surface 15a has the same height H3 from the base floor of the portion on which the first panel 20 and the second panel 25 are placed.

  The protruding portion 16 is a portion having a substantially rectangular shape when viewed from above, protruding upward from substantially four corners of the mounting surface 15a. The protruding portion 16 is disposed between ribs 22 and 28 of the first panel 20 and the second panel 25 described later, and the first panel 20 and the second panel 25 (ribs 22 and 28) with respect to the support member 10. Position.

  The mounting portion 15 and the protruding portion 16 are formed with insertion holes 17 penetrating vertically. A bolt 18 penetrating the first panel 20 and the second panel 25 is inserted into the insertion hole 17. A nut 19 into which a bolt 18 inserted into the insertion hole 17 is screwed is disposed in the mounting portion 15. The bolts 18 penetrating the first panel 20 and the second panel 25 are screwed into the nut 19, whereby the first panel 20 and the second panel 25 are fixed to the mounting portion 15.

  By turning the nut 13 with respect to the male screw 12, the vertical position of the nut 13 is adjusted. Along with this, the vertical position of the cylinder 14 placed on the nut 13 is adjusted, and the height H3 of the mounting surface 15a of the mounting portion 15 connected to the cylinder 14 is adjusted. Thereby, the vertical position (height H1, H2 from the foundation floor to the floor surface 4) of the 1st panel 20 and the 2nd panel 25 mounted on the mounting surface 15a is adjusted. The nut 13 is prevented from rotating by abutting a set screw 13 a that penetrates a part of the nut 13 in the radial direction against the support leg 11, and the set screw 14 a of the cylinder 14 is abutted against the support leg 11. The body 14 is prevented from rotating.

  The first panel 20 includes a plate portion 21 made of a rectangular flat plate and a plurality of ribs 22 protruding from the lower surface of the plate portion 21 and intersecting each other. The plate portion 21 and the rib 22 are cast products made of aluminum alloy that are integrally formed by die casting. As described above, by providing the ribs 22 on the plate portion 21, it is possible to secure the strength and rigidity of the first panel 20 while reducing the weight of the first panel 20.

  The upper surface of the plate portion 21 of the first panel 20 is flat and constitutes the floor surface 4 of the first panel 20. In the present embodiment, the heights L1 of the ribs 22 of the first panel 20 are all the same. The thickness and interval (number) of the ribs 22 are set as appropriate. The thicker the ribs 22 and the narrower the interval between the ribs 22 (the greater the number), the higher the strength and rigidity of the first panel 20, but the heavier. Moreover, the larger the plate thickness of the plate portion 21, the higher the strength and rigidity of the first panel 20, but the heavier.

  When the first panel 20 is placed on the placement surface 15a, the corner ribs 22 of the first panel 20 are placed on the placement surface 15a. And the protrusion part 16 is arrange | positioned between the some rib 22 mounted on the mounting surface 15a, and the rib 22 (1st panel 20) is positioned by the protrusion part 16. FIG. Further, a first hole 23 through which the head portion of the bolt 18 fits and the shaft portion of the bolt 18 passes is formed in the plate thickness direction in the portion of the plate portion 21 surrounded by the rib 22 placed on the placement surface 15a. It is formed through.

  The second panel 25 includes a base panel 26 having a plate portion 21 and a plurality of ribs 22, and a reinforcing plate 27 that is superimposed on the entire surface of the base panel 26 and constitutes the floor surface 4. The base panel 26 is obtained by removing a portion (a lower portion of the rib 22) of the first panel 20 on the mounting surface 15a from below by a thickness L2 of the reinforcing plate 27 by cutting or grinding. In the following description, the rib from which this part has been removed will be described as the rib 28. Further, in FIG. 2, the outer shape of the removed portion is shown by a two-dot chain line.

  The reinforcing plate 27 is a steel plate having a thickness L2 of 5 mm or more and 15 mm or less. In top view, the shape and dimensions of the base panel 26 (plate portion 21) and the shape and dimensions of the reinforcing plate 27 are the same. The reinforcing plate 27 is stacked on the base panel 26 so that the edge of the reinforcing plate 27 and the edge of the plate portion 21 are parallel to each other. That is, the reinforcing plate 27 is overlaid on the entire surface of the base panel 26 without protruding from the edge of the base panel 26.

  The reinforcing plate 27 superimposed on the plate portion 21 is formed with a second hole 29 (a part of the through hole) penetratingly formed in the plate thickness direction immediately above the first hole 23 (a part of the through hole) of the plate portion 21. Yes. The second hole 29 is a hole through which the head portion of the bolt 18 fits and the shaft portion of the bolt 18 passes therethrough. The bolt 18 inserted into the second hole 29 of the reinforcing plate 27 is screwed into the nut 19 in the mounting portion 15 while being inserted into the first hole 23 of the base panel 26, so that the reinforcing plate 27 and the base panel 26 are inserted. Is fixed to the mounting portion 15. Along with the fixing to the mounting portion 15, the reinforcing plate 27 is fixed to the base panel 26 by the bolt 18 (fixing portion).

  According to the above-described free access floor 1, the reinforcing plate 27, which is a steel plate having a thickness L2 of 5 mm or more, is superimposed on the entire surface of the plate portion 21 of the base panel 26 having the same configuration as the first panel 20. The reinforcing plate 27 is fixed to the base panel 26 by the bolts 18 to form the second panel 25. Thereby, the strength and rigidity of the second panel 25 can be increased with a simple configuration. In particular, the strength and rigidity of the second panel 25 are set higher than the strength and rigidity of the first panel 20.

  Therefore, for example, even if the center of the second panel 25 supported at the four corners by the support member 10 is not supported by the support member 10, the second panel 25 can be made to have high strength and high rigidity by the reinforcing plate 27. As a result, the space between the second panel 25 and the foundation floor can be prevented from being narrowed by the support member 10 provided at the center of the second panel 25.

  The placement location of the first panel 20 and the placement location of the second panel 25 that has been increased in strength and rigidity using the first panel 20 depend on the weight of the device placed on the floor surface 4 and the presence or absence of the device. Divided accordingly. The adjacent first panel 20 and second panel 25 are placed on one placement surface 15a, and the height H3 of the placement surface 15a of the portion on which each of the first panel 20 and the second panel 25 is placed is the same. By being set to, the structure of the support member 10 is simplified.

  Further, the thickness L4 of the portion (the plate portion 21 and the rib 28) placed on the placement surface 15a in the base panel 26 of the second panel 25 is the thickness of the portion of the first panel 20 placed on the placement surface 15a. The thickness L2 of the reinforcing plate 27 is smaller than the thickness L5. Therefore, by placing the first panel 20 and the second panel 25 on the placement surface 15a of one simplified support member 10, it is possible to remove from the foundation floor up to the floor surface 4 by the upper surface of the plate portion 21 of the first panel 20. And the height H2 from the foundation floor to the floor surface 4 by the reinforcing plate 27 of the second panel 25 can be made the same. As a result, the second panel 25 having high strength and high rigidity can be used for a part of the floor surface 4 while making it difficult to produce a step at the boundary with the first panel 20.

  Note that the base panel 26 does not overlap with the reinforcing plate 27, and the base panel 26 is increased in strength and rigidity by increasing the thickness of the plate portion 21 and the thickness of the ribs 22 or increasing the number of ribs 22. 26 can be used as a high-strength panel instead of the second panel 25. However, in order to integrally mold such a high-strength panel by die casting, a die casting machine having a large mold clamping force may be required, which is not preferable. In addition, increasing the thickness of the plate portion 21 and the thickness of the ribs 22 and increasing the number of ribs 22 increase the weight of the high-strength panel. At the time of construction or dismantling of 1, the burden on workers with high-strength panels is increased.

  In contrast, in the present embodiment, the second panel 25 having high strength and high rigidity is formed by overlapping the reinforcing plate 27 on the base panel 26 integrally formed by die casting. Thereby, in order to increase the strength and rigidity of the second panel 25, it is not necessary to increase the strength and rigidity of the base panel 26 itself by increasing the ribs 22 and so on, so that the base panel 26 is integrally formed. The mold clamping force of the die casting machine can be made relatively small.

  Further, the base panel 26 and the reinforcing plate 27 are fixed to the mounting portion 15 with the bolts 18, but the base panel 26 and the reinforcing plate 27 are not fixed to each other when the bolts 18 are removed. Therefore, the base panel 26 and the reinforcing plate 27 can be handled separately, such as when the free access floor 1 is constructed or disassembled, or when the base panel 26 or the reinforcing plate 27 is post-processed. As a result, compared with a case where the worker has the second panel 25 in which the reinforcing plate 27 is fixed to the base panel 26, the burden on the worker who has the reinforcing plate 27 and the base panel 26 separately can be reduced.

  Furthermore, since the reinforcing plate 27 is stacked on the base panel 26 without the reinforcing plate 27 protruding from the edge of the base panel 26, it is possible to prevent one reinforcing plate 27 from overlapping the plurality of base panels 26. it can. As a result, only one second panel 25 can be easily removed, so the number of second panels 25 to be removed can be reduced during maintenance or inspection of cords and cables under the floor.

  The base panel 26 is obtained by removing a portion of the first panel 20 placed on the placement surface 15a by a thickness L2 of the reinforcing plate 27 from below. Therefore, the height H1 of the floor surface 4 of the first panel 20 and the height H2 of the floor surface 4 of the second panel 25 are easily matched while forming the base panel 26 by a slight process on the first panel 20. be able to. As a result, it is possible to more easily form the high-strength and high-rigidity second panel 25 that is less likely to cause a step at the boundary with the first panel 20. In addition, since the base panel 26 is formed by diverting the first panel 20, a mold for the base panel 26 can be dispensed with.

  The first panel 20 that is diverted to the base panel 26 does not have to be completely the same as the first panel 20 adjacent to the second panel 25. The first panel 20 before being processed into the base panel 26 and the first panel 20 adjacent to the second panel 25 have the same outer shape and dimensions in a top view, and the thickness of the portion placed on the placement surface 15a. The length L5 may be the same. You may change suitably the raw material of both, the position of the rib 22, a number, thickness, etc.

  The height L1 of the rib 22 of the part of the first panel 20 on the mounting surface 15a is equal to or greater than the thickness L2 of the reinforcing plate 27. Here, when the height L1 is smaller than the thickness L2, the ribs 22 of the part of the first panel 20 placed on the placement surface 15a are all removed and the plate portion 21 that interferes with the placement surface 15a is removed. Some need to be removed. Thereby, the base panel 26 for making the height H1 of the floor surface 4 of the first panel 20 the same as the height H2 of the floor surface 4 of the second panel 25 is formed from the first panel 20.

  In the present embodiment, since the height L1 is equal to or greater than the thickness L2, the ribs 22 of the first panel 20 on the placement surface 15a are removed by the thickness L2 of the reinforcing plate 27 to form the ribs 28. Thus, the base panel 26 in which the plate portion 21 does not interfere with the placement surface 15a can be easily formed. As a result, the high-strength and high-rigidity second panel 25 that hardly causes a step at the boundary with the first panel 20 can be formed more easily.

  Further, the height L1 of the rib 22 of the first panel 20 on the portion placed on the placement surface 15a is equal to or greater than the total value of the thickness L2 of the reinforcing plate 27 and the height L3 of the protruding portion 16. As a result, the ribs 22 of the first panel 20 that are placed on the mounting surface 15a are removed by the thickness L2 of the reinforcing plate 27 to form the ribs 28, and the plate 21 is not removed without removing a portion of the plate portion 21. The base panel 26 in which the portion 21 does not interfere with the protruding portion 16 can be easily formed. As a result, the high-strength and high-rigidity second panel 25 that hardly causes a step at the boundary with the first panel 20 can be formed more easily.

  While the first panel 20 and the base panel 26 are made of an aluminum alloy, the reinforcing plate 27 is made of steel harder than the aluminum alloy, so that the strength and rigidity of the second panel 25 can be increased by the reinforcing plate 27. . Further, since the thickness L2 of the reinforcing plate 27 is 5 mm or more, the strength and rigidity of the second panel 25 can be sufficiently increased by the reinforcing plate 27. The thickness L2 of the reinforcing plate 27 is preferably 15 mm or less. Thereby, since it can prevent that the reinforcement board 27 becomes too heavy, the burden of the operator who has the reinforcement board 27 by construction, dismantling, etc. of the free access floor 1 can be reduced. The thickness L2 of the reinforcing plate 27 is more preferably set between 10 mm and 15 mm. In this case, the strength and rigidity of the second panel 25 can be increased by the reinforcing plate 27 while reducing the burden on the worker who has the reinforcing plate 27 in the construction or dismantling of the free access floor 1.

  By performing the same surface processing (painting, application of resin tile, etc.) on the floor surface 4 of the reinforcing plate 27 of the second panel 25 and the floor surface 4 of the plate portion 21 of the first panel 20, the second panel 25. The appearance of the floor surface 4 and the floor surface 4 of the first panel 20 can be made the same. Further, by changing the appearance of the floor surface 4 of the second panel 25 and the floor surface 4 of the first panel 20, it is possible to easily determine a place where a device requiring high strength and high rigidity can be placed.

  Although the present invention has been described based on the above-described embodiment, the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. It can be easily guessed. For example, you may change suitably the shape and dimension of each part of the supporting member 10, the 1st panel 20, and the 2nd panel 25. FIG. Further, the height L1 of the rib 22 of the portion of the first panel 20 placed on the placement surface 15a may be different from the height of the rib 22 of the portion not placed on the placement surface 15a. Further, the first panel 20 and the second panel 25 (the base panel 26 and the reinforcing plate 27) may be penetrated in the plate thickness direction to provide holes for ventilation and device fixing.

  Although the case where the first panel 20 and the base panel 26 are made of an aluminum alloy and the reinforcing plate 27 is a steel plate has been described in the above embodiment, the present invention is not necessarily limited thereto. The first panel 20 and the base panel 26 may be made of a metal other than an aluminum alloy, and the reinforcing plate 27 may be made of a metal other than steel. Furthermore, you may comprise the 1st panel 20, the base panel 26, and the reinforcement board 27 from the composite material of a synthetic resin or a metal and a synthetic resin. Further, the reinforcing plate 27 is not limited to a single plate material, and the reinforcing plate 27 may be formed of a plurality of plate materials. The total thickness of the plurality of plate members may be 5 mm or more. Since the reinforcing plate 27 is composed of a plurality of plate materials, the worker can be individually provided with each of the plate materials constituting the reinforcing plate 27 during construction and the burden on the operator can be reduced.

  The first panel 20 and the base panel 26 are not limited to die-cast integrally molded products, and other casting methods, injection molding methods, insert molding methods, etc., depending on the materials of the first panel 20 and the base panel 26. May be used to manufacture an integrally molded product of the first panel 20 and the base panel 26. Moreover, you may join the board | plate part 21 and the ribs 22 and 28 which were each shape | molded with welding, a volt | bolt, etc.

  Although the said form demonstrated the support member 10 by which the height H3 from the foundation floor of the mounting surface 15a is adjusted by adjusting the vertical position of the nut 13 with respect to the support leg 11, it is not necessarily restricted to this. Absent. As long as the support member 10 can support the first panel 20 and the second panel 25 above the foundation floor, the configuration thereof may be appropriately changed. For example, the mounting portion 15 is directly fixed to the support leg 11, or the cylindrical body 14 or the mounting portion 15 is directly fixed to the foundation floor, so that the height H <b> 3 of the mounting surface 15 a cannot be adjusted. Also good. Further, a plurality of beams may be provided on the foundation floor, and the support legs 11, the cylindrical body 14, and the placement portion 15 may be fixed on the beams. In this case, the beam is also part of the support member.

  In the above embodiment, a case has been described in which the corners of the four first panels 20 and the second panels 25 are placed on one placement surface 15a, but the present invention is not necessarily limited thereto. By appropriately setting the placement surface 15a, two first panels 20 and a second panel 25 are placed on one placement surface 15a, or one first panel 20 is placed on one placement surface 15a. Alternatively, only the second panel 25 may be placed.

  In the above embodiment, the thickness L4 of the portion of the base panel 26 that is placed on the placement surface 15a is greater than the thickness L5 of the portion of the first panel 20 that is placed on the placement surface 15a. However, the present invention is not necessarily limited to this. If the height H1 of the floor surface 4 of the first panel 20 and the height H2 of the floor surface 4 of the second panel 25 are the same, the thickness L4 of the base panel 26 and the thickness L5 of the first panel 20 Or the difference between the thickness L4 and the thickness L5 may be set to other than the thickness L2. For example, a step is provided on one mounting surface so that the height of the portion on which the first panel 20 is placed is different from the height of the portion on which the base panel 26 is placed. The thickness L4 of the panel 25 may be the same.

  Further, a spacer may be sandwiched between the first panel 20 and the mounting surface 15a so that the thickness L5 of the first panel 20 and the thickness L4 of the second panel 25 are the same. The adjacent first panel 20 and second panel 25 are supported by different support members 10 (mounting surfaces 15a), and the height H1 of the floor surface 4 of the first panel 20 and the floor surface 4 of the second panel 25 are supported. The height of the mounting surface 15a of the support member 10 may be adjusted so that the height H2 is the same.

  In the above embodiment, the bolt 18 inserted into the second hole 29 of the reinforcing plate 27 and the first hole 23 of the base panel 26 is screwed into the nut 19 in the mounting portion 15, whereby the reinforcing plate 27 and the base panel 26. Although the case where these are fixed to each other and fixed to the mounting portion 15 has been described, the present invention is not necessarily limited thereto. The reinforcing plate 27 and the base panel 26 may be fixed to the mounting portion 15 by inserting shaft-like fastening members other than the bolts 18 such as rivets and press-fit pins into the first hole 23 and the second hole 29. In addition to the member that fixes the reinforcing plate 27 and the base panel 26 to the placement portion 15, a fixing portion that fixes the reinforcing plate 27 to the base panel 26 may be provided. Examples of the fixing part include a fastening member such as a bolt, an adhesive, and a joint part by welding or friction stir welding. However, in order to reduce the burden on the operator by separately holding the base panel 26 and the reinforcing plate 27 at the time of construction, it is preferable to use a fastening member or an adhesive that is easily fixed at the construction site as the fixing portion. .

DESCRIPTION OF SYMBOLS 1 Free access floor 10 Support member 15 Mounting part 16 Projection part 18 Bolt (fixing part, fastening member)
20 1st panel 21 board part 22, 28 rib 23 1st hole (a part of through-hole)
25 Second panel 26 Base panel 27 Reinforcement plate 29 Second hole (part of the through hole)

Claims (6)

A plurality of support members disposed on the foundation floor;
A plurality of first panels and second panels respectively mounted on the plurality of support members;
The first panel includes a plate portion constituting a flat upper surface,
A plurality of ribs protruding from the lower surface of the plate portion and intersecting each other;
The second panel includes a base panel having the plate portion and a plurality of the ribs;
A reinforcing plate having a thickness of 5 mm or more that is superimposed on the entire surface of the base panel and constitutes a floor surface;
A fixing portion for fixing the reinforcing plate to the base panel;
The height from the foundation floor to the floor surface by the upper surface of the first panel is the same as the height from the foundation floor to the floor surface by the reinforcing plate of the second panel. Access floor. The support member includes a placement portion on which the first panel and the second panel adjacent to each other are placed,
In the mounting portion, the height from the foundation floor of the portion on which the first panel is placed is the same as the height from the foundation floor of the portion on which the second panel is placed,
The thickness of the portion of the base panel placed on the mounting portion is smaller than the thickness of the portion of the first panel placed on the mounting portion by the thickness of the reinforcing plate. Item 1. Free access floor.   3. The free access floor according to claim 2, wherein the base panel is obtained by removing a portion of the first panel placed on the mounting portion from the lower side by a thickness of the reinforcing plate. A part of the rib is placed on the mounting portion,
The free access floor according to claim 3, wherein a height of the rib of the first panel in a portion placed on the mounting portion is equal to or greater than a thickness of the reinforcing plate. The support member includes a protruding portion that protrudes upward from the placement portion and is disposed between the ribs,
The free height according to claim 4, wherein a height of the rib of the first panel in a portion placed on the placement portion is equal to or greater than a total value of a thickness of the reinforcing plate and a height of the protruding portion. Access floor.   The fixing portion is a shaft-shaped fastening member that is inserted into a through-hole that penetrates the base panel and the reinforcing plate in a plate thickness direction, and fixes the base panel and the reinforcing plate to the support member. The free access floor according to any one of claims 1 to 5.

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