JP2010270472A - Frame for free access floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame for a free access floor, facilitating installation and construction while allowing the installation of a heavy facility at the upper part without amplifying vibration from a floor. <P>SOLUTION: A lower frame 38a is provided above posts 23. The lower frame 38a is composed of frame members 37a. Each frame member 37a has holes 55 at both ends, and holes 26 are provided between the holes 55. The hole 55 is a joint part to the post 29 and internally threaded inside. The frame member 37a is of linear shape, and four frame members 37a are joined to form the substantially rectangular lower frame 38a, that is, the frame members 37a are overlapped in a vertically alternate manner with the mutually adjacent frame members 37a. The overlapped frame members 37a are aligned at the holes 55 and joined by the posts 29, that is, the posts 29 are screwed into the holes 55 of the frame members 37a in the overlapped state. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention is used for a free access floor and can be installed with equipment or the like on the upper part, suppresses amplification of vibration from the floor part, and does not transmit amplified vibration to equipment installed on the upper part. The present invention relates to a rigid free access floor mount.

  Conventionally, the floor panel which comprises a free access floor is arrange | positioned on a support body, and space is formed under a floor panel. The underfloor is used for arranging wiring and flowing air, and a light floor panel is used in consideration of workability and the like.

  However, when installing heavy objects such as equipment on the free access floor, a certain degree of strength is required for the floor panel and the support. In particular, manufacturing equipment such as a semiconductor substrate is vulnerable to vibration, and if the rigidity of the floor panel and the support is insufficient, the support or the like amplifies the vibration of the floor surface and transmits large vibration to the equipment.

  For this reason, when installing facilities that are heavy objects that do not like vibration, such as semiconductor substrate manufacturing equipment, on the free access floor, concrete is placed in advance at the installation location of the equipment, or an equipment installation section is provided, or a solid It is necessary to reinforce the steel structure. However, it is difficult to place and weld concrete in a clean room, and it is difficult to relocate or add equipment by changing the layout.

  As a floor panel in consideration of such strength, there is a panel for a free access floor provided on the back of a continuous concavo-convex shape (Patent Document 1).

  In addition, there is a free access floor in which border panel support legs and support beams are provided in the vicinity of the wall surface to increase the installation strength in the vicinity of the wall surface (Patent Document 2).

Japanese Patent Laid-Open No. 11-6276 JP-A-5-118120

  However, in the panel for the free access floor described in Patent Document 1, there is a limit to improving the strength of the panel itself, and it is necessary to improve the strength of the support that supports the panel. Is not taken into consideration, so there is a problem that there is a limit to the installation of heavy objects on the panel.

  In addition, the free access floor described in Patent Document 2 is an improvement in the strength of the support in the vicinity of the wall surface. For the method of improving the strength of the support in the center of the room, the lower part of the support is fixed. Only the effect of improving the bonding area between the plate and the floor is described, there is no description of a specific support structure for supporting a heavy object from the top and having high rigidity, and Patent Document 1 Similarly, there is a problem that there is a limit in installing heavy objects on the panel.

  For this reason, it is difficult for the panel and support described in Patent Document 1 and Patent Document 2 to secure sufficient strength for installing the equipment, and to amplify vibration from the floor surface. There is a problem that it is difficult to ensure such a high rigidity. Therefore, it is possible to cope with a layout change and the like while ensuring high rigidity, an assembly work or the like is easy, and a pedestal that can be installed on a free access floor is desired.

  The present invention has been made in view of such problems, and it is possible to install heavy equipment on the top without amplifying vibration from the floor, and a free access floor that is easy to install and construct. The purpose is to provide a platform.

  In order to achieve the above-described object, the present invention includes a lower plate, a first column provided on the lower plate, a lower frame joined to the lower plate via the first column, A second support provided on the lower frame; an upper frame joined to the lower frame via the second support; and an upper plate joined to the upper frame; At least one of the lower frame and / or the upper frame is divided into four parts, and is a free-access floor gantry characterized by having a substantially rectangular shape by joining the four divided frame members.

  The frame member is a linear plate-like member straddling the adjacent second support columns, and the adjacent frame members may be overlapped and bonded at a joint portion with the second support columns. Good.

  In the frame member, the thickness in the vicinity of the joint portion between the frame members is thinner than the thickness of the portion other than in the vicinity of the joint portion, and the thickness of the joint portion and the portion other than the joint portion are in a state where the frame members are joined together. The thickness may be approximately equal. In this case, the joint portion provided at both ends of the frame member is thin on one side of the frame member so as to form a step portion on the upper surface side of the frame member. On the other side, it is preferable that the wall thickness is thin so as to form a step portion on the lower surface side of the frame member.

  According to the present invention, since the upper and lower frames are divided, the weight of the frame can be dispersed, so that the installation of the frame is easy, and installation work can be performed more efficiently without the need for equipment such as a crane. It can be carried out. Also, if the frame is divided into four and each frame member is a linear plate-like member straddling the second column, the frame members can be joined at the junction of the second column, A separate connecting member is not necessary.

  In addition, if the thickness of the joint part between the frame members is made thinner than other parts (for example, if the thickness is 1/2 that of other parts), the frame members are overlapped and joined, The total thickness of the joint portion and the thickness of the frame member alone other than the joint portion can be made substantially equal. For this reason, the frame joined to the support has no strength or directionality with respect to vibration, and can exhibit stable strength and the like.

  In particular, if the thin portions on both sides of the frame member are arranged so that one is on the upper surface side and the other is on the lower surface side, four frame members having the same shape can be combined.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to install a heavy installation in the upper part, without amplifying the vibration from a floor, and can provide the base for free access floors which installation and construction are easy.

The exploded perspective view which shows the mount frame 1. FIG. FIG. 3 is an assembled perspective view showing the gantry 1. The front view which shows the mount frame 1. FIG. It is a figure which shows the frame member 37a, (a) is a front view, (b) is a top view. The figure which shows the state which installed the mount frame 1. FIG. The disassembled perspective view which shows the mount frame 1a. The assembly perspective view which shows the mount frame 1a. The front view which shows the mount frame 1a. The front view which shows the frame member 37c. The front view which shows the frame members 37e and 37d. The exploded perspective view which shows the mount frame 80. FIG. The assembly perspective view which shows the mount frame 80. FIG. The front view which shows the mount frame 80. FIG. The figure which connected the frame member 47 and was seen from the bottom face. It is a figure which shows the support | pillar 31, (a) is a perspective view, (b) is the sectional view on the AA line of (a). The top view of the frame member 47. FIG.

  Hereinafter, the gantry 1 according to the embodiment of the present invention will be described. FIG. 1 is an exploded perspective view showing a gantry 1 according to the first embodiment, FIG. 2 is an assembled perspective view of the gantry 1, and FIG. 3 is a front view of the gantry 1.

  The gantry 1 mainly includes a lower plate 3, a lower frame 38a (frame member 37a), support columns 23 and 29, an upper frame 40a (frame member 37b), an upper plate 45, and the like.

  The lower plate 3 is a part bonded to the floor when the gantry 1 is installed on the floor. The lower plate 3 is a steel plate-like member, for example, and is provided with notches 8 at portions corresponding to the four corners of the gantry 1. The notch 8 is for preventing interference with a support member for installing a floor panel for free access when the mount 1 is installed. That is, the gantry 1 can be installed without interfering with the legs of the existing support.

  A reinforcing member 25 is provided on the lower plate 3. The reinforcing member 25 is a steel plate-like member, for example, and is thicker than the lower plate 3. The reinforcing member 25 is a joint portion with a post 23 described later, and is provided between the cutout portions 8. The reinforcing member 25 and the lower plate 3 may be joined by welding or other methods, and even when the reinforcing member 25 and the lower plate 3 are manufactured integrally in advance, the portion is referred to as a reinforcing member. The reinforcing member 25 is provided with a plurality of holes 27. The hole 27 is provided with a female screw. Since the hole 27 does not penetrate to the lower plate 3, the adhesive or the like does not enter from the lower plate 3 to the upper side of the lower plate 3 or the hole 27 of the reinforcing member 25.

  A plurality of support columns 23 are provided on the lower plate 3 in a substantially vertical direction. The support | pillar 23 is a rod-shaped member made of steel with a hexagonal cross section, and a bolt portion having a smaller diameter than the hexagonal cross section is provided at both ends. The bolt portion below the support 23 is screwed into the hole 27 of the reinforcing member 25 and fixed. A total of eight struts 23 are provided in the vicinity of each side of the lower plate 3 so as to receive the force from above evenly.

  In addition, the cross-sectional shape of the support | pillar 23 is not restricted to a hexagonal cross section. If the support | pillar 23 is a polygonal cross-sectional shape, since the support | pillar 23 can be rotated without requiring a special tool, attachment work is easy. Further, it is desirable to increase the surface roughness of the stepped surface between the polygonal cross-sectional shape portion and the bolt portion because the positional accuracy of the contact surface with the frame is improved and the dimensional accuracy is improved.

  Moreover, the number and installation position of the support | pillar 23 should just be able to perform joining with the lower frame 38a mentioned later reliably, and are not restricted to the form of the mount frame 1 mentioned above. However, in order to reliably obtain high rigidity, it is desirable that when the gantry 1 is viewed from above, the arrangement of the columns 23 is symmetrical with respect to the center of the gantry 1 because the load balance is excellent.

  A lower frame 38a (FIGS. 2 and 3) is provided above the column 23. The lower frame 38a is constituted by a frame member 37a. The frame member 37a is a steel plate-like member.

  4A and 4B are views showing the frame member 37a. FIG. 4A is a front view of the frame member 37a, and FIG. 4B is a plan view of the frame member 37a. The frame member 37 a has holes 55 at both ends, and the holes 26 are provided between the holes 55. The hole 26 is a connection portion with the support column 23. Moreover, the hole 55 is a junction part with the support | pillar 29 mentioned later, and an internal thread process is given to an inside. That is, the hole 26 is provided at the installation position of the column 23 when the frame member 37 a is installed on the lower plate 3.

  A fixing portion 15a is provided in the vicinity of the hole 26 of the frame member 37a. The fixing portion 15a is a joint portion with a turnbuckle described later, and protrudes from the upper surface of the frame member 37a.

  The bolt portion above the support post 23 passes through the hole 26 of the frame member 37 a and is fixed by the nut 24. That is, the frame member 37a is sandwiched between the hexagonal cross-section portion of the column 23 and the nut 24 from both sides in the vertical direction, and the column 23 is fixed to the frame member 37a.

  The frame member 37a has a linear shape, and the four frame members 37a are joined to form a substantially rectangular lower frame 38a. In other words, the frame members 37a are alternately stacked one above the other on the frame members 37a adjacent to each other. The overlapped frame member 37a is joined by a post 29 described later with the hole 55 aligned. That is, the support column 29 is screwed into the hole 55 of the frame member 37a in an overlapped state.

  In addition, since the frame members 37a are alternately stacked one above the other, the pillars 23 joined to the frame members 37a are set to corresponding heights. In addition, since the frame member 37a is overlapped at the joint portion with the support column 29, the thickness is thicker than other portions.

  Corner portions of the frame member 37a are cut. Therefore, the four corners of the lower frame 38a formed by joining the frame member 37a do not interfere with the existing support body.

  As described above, the support column 29 is provided in the substantially vertical direction on the lower frame 38a formed of the frame member 37a. Four support columns 29 are provided near the four corners of the lower frame 38a. The strut 29 is a steel hexagonal cross-section rod-shaped member, and bolts having a diameter smaller than that of the hexagonal cross-section are provided at both ends. The bolt portion below the support column 29 is fixed by being screwed into the hole 55 of the overlapped frame member 37a.

  In addition, the cross-sectional shape of the support | pillar 29 is not restricted to a hexagonal cross section. If the support | pillar 29 is polygonal cross-sectional shape, since the support | pillar 29 can be rotated without requiring a special tool, attachment work is easy. Further, it is desirable to increase the surface roughness of the stepped surface between the polygonal cross-sectional shape portion and the bolt portion because the positional accuracy of the contact surface with the frame is improved and the dimensional accuracy is improved.

  Moreover, the number and installation position of the support | pillar 29 should just be able to join with the upper flame | frame 40a mentioned later reliably, and are not restricted to the form of the mount frame 1 mentioned above. However, in order to reliably obtain high rigidity, it is desirable that when the gantry 1 is viewed from above, the arrangement of the columns 29 is symmetrical with respect to the center of the gantry 1 because the load balance is excellent. In particular, it is desirable to increase the rigidity so that the struts 29 are separated from each other so that the struts 29 are close to the four corners of the lower frame 38a.

  Above the support column 29, an upper frame 40a (FIGS. 2 and 3) is provided. The upper frame 40a is configured by a frame member 37b. The frame member 37b is a steel plate-like member. The frame member 37b has holes 13b at both ends, and holes 41a are provided at both ends of the hole 13b. The hole 13 b is a connection portion with the support column 29. Moreover, the hole 41a is a joint part with the adjustment member 39 mentioned later, and an internal thread process is given inside.

  Similar to the frame member 37a, the frame member 37b has a linear shape, and the four frame members 37b are joined to form an upper frame 40a having a substantially rectangular shape. In other words, the frame members 37b are alternately stacked with the frame members 37b adjacent to each other. The overlapped frame members 37b are joined by the columns 29 with the positions of the holes 13b being aligned. That is, the support column 29 passes through the hole 13b of the frame member 37b in an overlapped state, and is fixed by the nut 21b.

  Since the frame members 37b are alternately stacked one above the other, the joint portion with the support column 29 is thicker than other portions.

  Corner portions of the frame member 37b are cut. Therefore, the four corners of the upper frame 40a formed by joining the frame member 37b do not interfere with the existing support body.

  A fixing portion 15b is provided in the vicinity of the hole 13b of each frame member 37b. The fixed portion 15b is a joint portion with the turnbuckle and protrudes from the lower surface of the frame member 37b.

  A turnbuckle 35 is provided so as to connect the fixing portion 15a on the upper surface of the lower frame 38a and the fixing portion 15b on the lower surface of the upper frame 40a. The turnbuckle 35 is provided obliquely on a substantially diagonal line of a rectangular portion formed by the lower frame 38a, the upper frame 40a, and the support column 29. The fixing portions 15a and 15b are previously provided with bolt holes, and the turnbuckle 35 is joined to the lower frame 38a and the upper frame 40a by bolts. The turnbuckle 35 is desirably provided at an angle of approximately 45 degrees with respect to the horizontal direction. For this reason, it is desirable that the interval between the fixed portions 15a (fixed portions 15b) adjacent to each other on the same side and the interval between the lower frame 38a and the upper frame 40a are substantially equal. The height of the support column 23 and the height of the support column 29 are set in advance so as to satisfy such a relationship.

  The turnbuckle 35 mainly suppresses amplification of horizontal vibrations of the gantry 1 and can increase the rigidity of the gantry 1. Instead of the turnbuckle 35, other reinforcing members can be provided in an oblique direction between the upper frame 40a and the lower frame 38a.

  An upper plate 45 is provided on the upper frame 40a. The upper plate 45 is a rectangular member made of aluminum, and is a part where equipment and the like are installed in the upper part. As the upper plate 45, a conventional floor panel can be used, and other materials may be used. The upper plate 45 is provided with a hole 41b.

  An adjustment member 39 is provided between the upper frame 40 a and the upper plate 45. The adjustment member 39 is a member that connects the upper frame 40 a and the upper plate 45 and adjusts the height of the upper plate 45.

  The lower end of the adjustment member 39 is a bolt part, and is screwed into a hole 41a provided in the upper frame 40a (frame member 37b) and fixed with a nut. The upper end portion of the adjustment member 39 has a female screw portion into which the bolt 49 can be screwed, and is screwed with the bolt 49 penetrating the hole 41 b of the upper plate 45. That is, the lower end of the adjustment member 39 is fixed by being screwed into the hole 41 a of the upper frame 40 a, and the upper end is fixed to the upper plate 45 by the bolt 49. By adjusting the screwing allowance between the adjustment member 39 and the upper frame 40a, the distance between the upper frame 40a and the upper plate 45 can be adjusted.

  Although not shown, the hole 41b of the upper plate 45 has a stepped shape so that the head of the bolt 49 can be accommodated. When the upper plate 45 and the upper frame 40a are fixed by the bolt 49, the bolt 41b 49 does not protrude on the surface of the upper plate 45.

  Further, notches are provided in the lower surfaces of the four corners of the upper plate 45. The notch is for preventing interference with the support for installing the adjacent free access floor panel. That is, the gantry 1 can be installed without interfering with the legs of the existing support.

  Next, the installation state of the gantry 1 will be described. FIG. 5 is a plan view showing a state where the gantry 1 is installed at a position corresponding to the equipment installation site 53 on the floor on which a plurality of floor panels 51 are arranged. The upper surface of the gantry 1 is the same size as the floor panel 51. That is, the upper plate 45 is the same size as the floor panel 51.

  When the equipment installation site 53 is determined on the free access floor, the floor panel 51 corresponding to the equipment installation site 53 is removed, and the gantry 1 is installed instead. The gantry 1 may be used alone or may be two vertically and horizontally as shown in FIG. 5 depending on the size of the equipment installed in the upper part. Depending on the size of the equipment and the equipment installation site 53, the number of installations of the gantry 1 can be determined as appropriate. For example, in order to obtain a wider range of equipment installation sites 53, the adjacent floor panel 51 may be replaced with the gantry 1.

  Usually, a support is installed at the junction of each corner of the floor panel 51, and the floor panel 51 is disposed on the support. Since the gantry 1 has the notches 8 at the four corners of the lower plate 3, it does not interfere with the legs of the existing support. Further, the corners of the four corners of the lower frame 38a and the upper frame 40a are also cut and provided with cutout portions, so that they do not interfere with the support. For this reason, the gantry 1 can be installed in a state where the support is installed.

  Thus, according to the gantry 1 according to the present embodiment, since it has high rigidity (particularly horizontal rigidity), it does not amplify vibration from the floor. Even if a weak facility is installed, vibration from the floor is not amplified and transmitted.

  Further, since the lower frame 38a and the upper frame 40a are divided by the frame members 37a and 37b, respectively, the weight of each frame can be dispersed. Therefore, the installation work of the lower frame 38a and the upper frame 40a is easy, and the installation work can be performed more efficiently without the need for equipment such as a crane. Further, the frame members 37a and 37b are linear so as to straddle the second support column, and the frame members 37a and 37b can be joined to each other at the joint portion of the second support column. It is unnecessary.

  Further, since the four corners of the lower plate 3 are notched, the base plate 1 is installed in place of the existing floor panel 51 when the equipment is moved or expanded without interfering with the legs of the existing support or the like. It is possible. In particular, since the gantry 1 is easy to assemble and disassemble each member, it can be easily installed on-site without performing welding work in a clean room or requiring special cranes or other equipment. Can be performed.

  In addition, since the reinforcing member 25 is provided at the joint between the lower plate 3 and the support post 23, high rigidity can be obtained at the joint with the support post 23. Further, since the hole 27 provided in the reinforcing member 25 does not penetrate the lower plate 3, the adhesive used for bonding the lower plate 3 does not enter the hole 27. Further, if female threading is performed on the hole 27, it is not necessary to weld a nut or the like to the lower plate 3, and it is easy to join the column 23.

  Moreover, since the support | pillars 23 and 29 are polygonal cross-sectional shapes, even if there is no special tool, it can be rotated easily and attachment is easy. Moreover, since the polygonal cross-sectional shape part of the support | pillars 23 and 29 has a larger diameter than a bolt part, high rigidity can be acquired. Further, since the columns 23 and 29 are provided near the four corners of the lower frame 17 and the columns 23 and 29 are separated from each other, greater rigidity can be obtained.

  Next, the gantry 1a according to the second embodiment will be described. 6 to 8 are views showing the gantry 1a, FIG. 6 is an exploded perspective view of the gantry 1a, FIG. 7 is an assembled perspective view of the gantry 1a, and FIG. 8 is a front view of the gantry 1a. In addition, in the gantry 1a, the same number as FIG. 1-3 is attached | subjected to the component which performs the same function as the gantry 1 shown in FIGS. 1-3. The frame 1a is different from the frame member used for the frame 1.

  That is, the lower frame 38b (FIGS. 2 and 3) of the gantry 1a is configured by the frame member 37c. The upper frame 40b (FIGS. 2 and 3) includes frame members 37d and 37e.

  FIG. 9 is a view showing the frame member 37c. The frame member 37c is a steel plate-like member. The frame member 37c has holes 55 at both ends, and the holes 26 are provided between the holes 55 (see FIG. 1). The hole 26 is a connection portion with the support column 23. Moreover, the hole 55 is a junction part with the support | pillar 29 mentioned later, and an internal thread process is given to an inside.

  A fixing portion 15a is provided in the vicinity of the hole 26 of the frame member 37c. The fixing portion 15a is a joint portion with the turnbuckle and protrudes from the upper surface of the frame member 37c.

  The portions where the holes 55 of the frame 37c are provided are the joint portions 57a and 57b where the frame members 37c are joined together by the support columns 29. The joint portion 57a, which is an end portion on one side of the frame member 37c, has a stepped portion 75 on the upper surface side, and the thickness of the joint portion 57a is substantially half of the thickness of a portion other than the joint portion. . On the other hand, the joining portion 57b, which is an end portion on the other side of the frame member 37c, has a stepped portion 75 on the lower surface side, and has a thickness that is substantially half the thickness of a portion other than the joining portion.

  Four frame members 37c are joined at joints 57a and 57b to form a substantially rectangular lower frame 38b. That is, the frame member 37c is joined by overlapping the joining portions 57a and 57b between the frame members 37c adjacent to each other. The support column 29 is screwed into the hole 55 of the frame member 37c in an overlapped state.

  Since the thickness of the joint portions 57a and 57b of the frame member 37c is substantially half of the thickness of other parts, the lower frame 38b has a substantially constant thickness even when the frame members 37c are overlapped with each other. Become.

  FIG. 10 is a view showing the frame members 37d and 37e. The frame members 37d and 37e are steel plate-like members. The frame members 37d and 37e have holes 13b at both ends, and a hole 41a is provided between the holes 13b (see FIG. 1). The hole 13b is a joint portion with a support column 29 described later, and is internally threaded. The hole 41 a is a connection portion with the adjustment member 39.

  A fixing portion 15b is provided in the vicinity of the hole 41a of the frame members 37d and 37e. The fixing portion 15b is a joint portion with the turnbuckle and protrudes from the lower surfaces of the frame members 37d and 37e.

  A portion where the hole 55 of the frame 37d is provided is a joint portion 57c joined to the frame member 37e by the support column 29. Further, the portion of the frame 37e where the hole 55 is provided is a joint portion 57d that is joined to the frame member 37d by the support column 29. The joint portion 57c, which is the end portion on both sides of the frame member 37d, has a stepped portion 75 on the lower surface side, and has a thickness that is substantially half the thickness of a portion other than the joint portion. On the other hand, the joining part 57d, which is the end part on both sides of the frame member 37e, has a stepped part 75 on the upper surface side, and has a thickness approximately half of the thickness of the part other than the joining part.

  A total of four frame members 37d and frame members 37e are joined together to form a substantially rectangular upper frame 40b. That is, the frame member 37d is joined to the adjacent frame member 37e by overlapping the joining portions 57c and 57d. The support column 29 penetrates through the hole 13b of the frame members 37d and 37e in an overlapped state, and is fixed by the nut 21b.

  Since the thickness of the joint portions 57c and 57d of the frame members 37d and 37e is substantially half the thickness of the other portions, even if the joint portions 57c and 57d of the frame members 37d and 37e are overlapped, The frame 40b has a substantially constant thickness.

  The corner portions of the frame members 37c, 37d, and 37e are cut. Therefore, the four corners of the lower frame 38b and the upper frame 40b do not interfere with existing supports.

  A connecting hole 43 is provided between the holes 41a of the frame members 37d and 37e. The connection holes 43 can connect adjacent bases 1a with a connection plate (not shown). When joining the gantry 1a to each other using the connecting hole 43, the connecting plate provided with the holes in advance is assembled with the frame members 37d and 37e (upper frame 40b) of the adjacent gantry 1a. It is installed so as to straddle each upper frame 40b of 1a. The positions of the holes of the connecting plate and the connecting holes 43 correspond to each other, and the upper frames 40b are connected to each other by fixing the connecting plates to the connecting holes 43 of the adjacent upper frames 40b with bolts or the like. That is, the gantry 1a can be connected and fixed. Higher rigidity can be obtained by connecting adjacent racks 1a.

  According to the gantry 1a according to the second embodiment, the same effect as the gantry 1 can be obtained. In addition, since the frame members 37c, 37d, and 37e have the joint portions 57a, 57b, 57c, and 57d whose thickness is substantially half that of other portions, the thickness of the joint portion is different even in the joined state. It does not become thicker than the part. For this reason, it is not necessary to change the height of the column 23 or the like depending on the part like the gantry 1, and the directionality such as the strength of the gantry 1 a is lost, and uniform strength can be obtained in all directions.

  Moreover, the connection hole 43 is provided in the upper surface of the upper frame 40b, and the adjacent mount frame 1a can be fixed with a connection plate etc. For this reason, higher rigidity can be obtained as a whole of the plurality of fixed bases 1a. Further, since the connecting work can be performed from the upper surface, the connecting work can be easily performed by removing the upper plate 45.

  The frame members 37d and 37e may be applied to the upper frame, and the frame member 37c may be applied to the lower frame. Further, only one of the upper and lower frames may be divided into a plurality of frame members.

  Next, a gantry 80 according to a third embodiment will be described. 11 to 13 are views showing the gantry 80, FIG. 11 is an exploded perspective view of the gantry 80, FIG. 12 is an assembled perspective view of the gantry 80, and FIG. 13 is a front view of the gantry 80. In the gantry 80, the same reference numerals as those in FIGS. 1 to 3 are assigned to the constituent elements having the same functions as those of the gantry 1 shown in FIGS. The gantry 80 is mainly composed of the lower plate 3, the frame member 47, the support column 31, the upper frame 58, the upper plate 45, and the like.

  The lower plate 3 is a part bonded to the floor when the gantry 80 is installed on the floor. The lower plate 3 is a steel plate-like member, and the notches 8 are provided at corresponding portions of the four corners of the gantry 80. The notch 8 is for preventing interference with a support member for installing a floor panel for free access when the mount 80 is installed. That is, the gantry 80 can be installed without interfering with the legs of the existing support.

  The lower plate 3 is provided with holes 5. The hole 5 is a hole having an internal thread on the inner surface, and is screwed with a bolt 7 described later.

  A frame member 47 is provided on the lower plate 3. The frame member 47 is an L-shaped member. FIG. 14 is a view of the frame member 47 as viewed from below. Holes 61 are provided at both ends of the frame member 47, and the frame members 47 can be connected by a connecting plate 59. Four frame members 47 are provided at the corners of the gantry 1 and are connected to each other to form a substantially rectangular member. The rectangular member formed by the frame member 47 becomes the lower frame 48. That is, the lower frame 48 is a steel rectangular member. Each frame member 47 is cut at corners to prevent interference with an existing support or the like.

  A leg portion 11 is provided below each frame member 47. The leg portion 11 has a tapered shape so as to increase in diameter toward the upper side (the lower surface side of the frame member 47) at the boundary with the lower surface of the frame member 47. A lower portion of the leg portion 11 is formed in a flange shape having a diameter larger than that of the shaft portion. A hole into which the bolt 7 can be inserted is provided in the flange portion of the leg portion 11, and the lower plate 3 and the lower frame 48 are joined by screwing the bolt 7 inserted into the hole into the hole 5 of the lower plate 3. Fixed.

  A total of eight legs 11 are provided on each frame member 47 so that the legs 11 can receive the force from above evenly. Note that the number and installation positions of the leg portions 11 are not limited to the above-described form of the gantry 80 as long as the lower plate 3 and each frame member 47 can be reliably joined. However, in order to reliably obtain high rigidity, it is desirable that the arrangement of the legs 11 be symmetrical with respect to the center of the gantry 80 when the gantry 80 is viewed from above, because the load balance is excellent.

  Further, the leg portion 11 is desirably provided at a position where the frame member 47 can stand by itself. That is, since the frame member 47 does not fall while the frame member 47 is placed on the lower plate 3, the installation work of the frame member 47 is facilitated.

  Holes 13 a are provided at the corners of each frame member 47. The hole 13a is a joint portion with a support column 31 described later. The vicinity of the hole 13a is slightly thicker than the surroundings and has high strength.

  Fixing portions 15 a are provided on both sides of the hole 13 a of each frame member 47. The fixing portion 15 a is a joint portion with the turnbuckle and protrudes from the upper surface of each frame member 47.

  A support column 31 is provided on the connected lower frame 48. Four support columns 31 are provided near the four corners of the lower frame.

  15A and 15B are views showing the support 31, FIG. 15A is a perspective view of the support 31, and FIG. 15B is a cross-sectional view of the support 31 taken along the line AA. The support column 31 mainly includes a pipe 71, an upper lid 65, a lower lid 67, bolt portions 63a and 63b, and the like.

  The pipe 71 is a steel hollow pipe. An upper lid 65 and a lower lid 67 are provided at openings at both ends of the pipe 71 so as to close both ends of the pipe 71. On the upper surface of the upper lid 65, a bolt part 63 a is provided on the same axis as the pipe 71. Similarly, a bolt part 63 b is provided on the lower surface of the lower lid 67 on the same axis as the pipe 71. The pipe 71, the upper lid 65, the lower lid 67, and the bolt parts 63a and 63b may be joined by welding, for example.

  As shown in FIG. 15B, the lower lid 67 is provided with a protruding portion 69 in a direction perpendicular to the axial direction of the pipe 71. The protrusion 69 is larger than the diameter of the pipe 71 and is formed in a flange shape. The projecting portion 69 has a straight portion 73 perpendicular to the axial direction of the pipe 71. The straight line portion 73 is a straight line portion substantially parallel to the tangent line of the pipe 71 on the side where the projecting portion 69 is provided. Protrusions 69 are provided in two directions on the column 31. The two protrusions are formed in directions perpendicular to each other. That is, the straight portions 73 intersect perpendicularly to each other.

  The shape of the lower lid 67 is not limited to the example of FIG. For example, a rectangular shape may be sufficient and it may be substantially the same as the cross-sectional shape of the pipe 71 except for a protrusion part. In the example shown in FIG. 15, the protrusion 69 is provided on the lower lid 67, but it may be provided on the upper lid 65.

  The bolt part 63b of the support column 31 is inserted into the hole 13a of the lower frame 48 (frame member 47) and fixed by the nut 21a. That is, the lower frame 48 is sandwiched and fixed between the lower lid 67 and the nut 21a.

  FIG. 16 is a plan view showing a state in which the column 31 is fixed on the frame member 47. As described above, the projecting portion 69 is provided on the support 31. The projecting portions 69 provided in the two directions are disposed so as to face the fixed portion 15a. At this time, the linear portion 73 of the protruding portion 69 faces the side surface of the fixed portion 15a. That is, the side surface of the fixed portion 15a and the linear portion 73 are opposed substantially in parallel. Therefore, the protruding portion 69 can contact the side surface of the fixed portion 15a in a substantially vertical direction.

  As shown in FIG. 16, since the projecting portion 69 faces the two fixed portions 15 a perpendicular to each other, the column 31 does not rotate relative to the frame member 47. In other words, the fixed portion 15 a serves as a regulating member that regulates the rotation of the support column 31.

  In addition, the number and the installation position of the support | pillar 31 should just be able to perform joining with the upper flame | frame 58 mentioned later reliably, and are not restricted to the form of the mount frame 80 mentioned above. However, in order to reliably obtain high rigidity, it is desirable that when the gantry 80 is viewed from above, the arrangement of the columns 31 is symmetrical with respect to the center of the gantry 80 because the load balance is excellent. In particular, it is desirable to increase the rigidity of the columns 31 in the vicinity of the four corners of the lower frame 48 so that the columns 31 are separated from each other.

  An upper frame 58 is provided above the column 31. The upper frame 58 is a substantially rectangular member having a hole in the center made of steel. The upper frame 58 is provided with a connecting hole 43, a hole 13b, and a hole 41a. The vicinity of the hole 13b and the hole 41a of the upper frame 59 is slightly thicker and stronger than other parts. The hole 13b is a joint portion of the support column 31 with the bolt portion 63a. The bolt part 63a of the column 31 passes through the hole 13b and is fixed by the nut 21b. That is, the upper frame 58 is fixed to the support 31.

  Note that the corners of the four corners of the upper frame 58 are cut. This is to prevent interference with an existing support that supports the floor panel. That is, the gantry 80 can be installed without interfering with the support or the like even at a site where the existing support or the like is installed.

  The connection hole 43 can connect the adjacent bases 80 with a connection plate. As described above, the gantry 80 may be provided with a plurality of gantry 80 depending on the size and position of the equipment to be installed in the upper part. In this case, by connecting the gantry 80 adjacent to each other, High rigidity can be obtained.

  Similarly to the connection holes 43, the mounts 80 can be connected to each other using the holes 61 of the lower frame 48. That is, the width of the connecting plate 59 is made larger than the width of the lower frame 48, the connecting plate 59 is installed so as to straddle the lower frames 48 of the adjacent frames 80, and at one end side of the connecting plate 59, When the frame members 47 of one gantry 80 are connected to each other and the frame members 47 of the other gantry 80 are connected to each other on the other side of the connection plate 59, the adjacent gantry 80 are also connected to each other by one connection plate 59. Can do.

  An upper plate 45 is provided on the upper frame 58. The upper plate 45 is a rectangular member made of aluminum, and is a part where equipment and the like are installed in the upper part. As the upper plate 45, a conventional floor panel can be used, and other materials may be used. An adjustment member 39 is provided between the upper frame 58 and the upper plate 45. The adjustment member 39 is a member that connects the upper frame 58 and the upper plate 45 and adjusts the height of the upper plate 45.

  Cutouts are provided in the lower surfaces of the four corners of the upper plate 45. The notch is for preventing interference with the support for installing the adjacent free access floor panel. That is, the gantry 80 can be installed without interfering with the legs of the existing support.

  The upper frame 45 is provided with a hole 41b. The adjustment member 39 and the upper plate 45 are joined by a bolt 49 penetrating the hole 41b.

  The lower frame 48 and the upper frame 58 are joined by a turnbuckle 35. The turnbuckle 35 is joined by bolts using bolt holes provided in advance in the fixing portions 15 a and 15 b of the lower frame 48 and the upper frame 58.

  According to the gantry 80 according to the third embodiment, the same effect as that of the gantry 1 according to the first embodiment can be obtained. Further, since the lower frame 48 is divided into four L-shaped frame members 47, the weight of the lower frame 48 can be dispersed, and installation work is easy. In particular, if the frame member 47 can stand on its own, the frame member 47 can be easily installed and connected.

  Further, the frames 48 of the adjacent mounts 80 can be connected to each other by using the connecting plate 59 that connects the frame members 47 to each other. For this reason, the bases 80 installed adjacent to each other are integrated, and the rigidity can be further increased, and the connecting operation is easy.

  Moreover, since the support | pillar 31 uses the pipe 71 as a main body, it is strong and lightweight. Further, the lower lid 67 is provided with a projecting portion 69, and the projecting portion 69 comes into contact with the fixed portion 15a on the lower frame 48 to restrict the rotation. For this reason, when connecting the support | pillar 31 and the upper flame | frame 58, even if the nut 21b is screwed in the bolt part 63a of the support | pillar 31, the support | pillar 31 does not rotate. For this reason, assembly work is easy.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

1, 1a, 80 ......... Stands 3, 19 ......... Lower plate 5 ......... Hole 7 ......... Bolt 8 ......... Notch 11 ......... Legs 13a, 13b ......... Holes 15a, 15b ......... Fixing portions 21a, 21b ......... Nuts 23, 29, 31 ......... Post 24 ......... Nut 25 ......... Reinforcing member 26 ......... Hole 27 ......... Hole 35 ......... Turnbuckle 37a, 37b, 37c, 37d, 37e ......... Frame members 38a, 38b ......... Lower frame 39 ......... Adjustment members 40a, 40b, 58 ......... Upper frames 41a, 41b ......... Hole 43 ......... Connecting hole 45 ......... Upper plate 47 ......... Frame member 48 ......... Lower frame 49 ......... Bolt 51 ......... Floor panel 53 ......... Equipment installation site 55 ......... Holes 57a, 57b, 57c, 57d ......... Junction 59 ..... Connecting plate 61 .... 63a, 63 b ......... bolt portion 65 ......... lid 67 ......... bottom cover 69 ......... projection 71 ......... pipe 73 ......... straight portion 75 ......... stepped portion

Claims (4)

A lower plate,
A first support provided on the lower plate;
A lower frame joined to the lower plate via the first support column;
A second support provided on the lower frame;
An upper frame joined to the lower frame via the second column;
An upper plate joined on the upper frame;
Comprising
At least one of the lower frame and / or the upper frame is divided into four parts, and the frame for the four parts is joined to form a substantially rectangular shape.   The frame member is a linear plate-like member that straddles the adjacent second support column, and the adjacent frame members are overlapped and bonded at a joint portion with the second support column. The base for a free access floor according to claim 1.   In the frame member, the thickness in the vicinity of the joint portion between the frame members is thinner than the thickness of the portion other than in the vicinity of the joint portion, and the thickness of the joint portion and the portion other than the joint portion are in a state where the frame members are joined together. The base for a free access floor according to claim 1 or 2, wherein the thicknesses are substantially equal. The joints provided at both ends of the frame member are:
On one side of the frame member, the thickness is reduced to form a step on the upper surface side of the frame member,
4. The free access floor pedestal according to claim 3, wherein on the other side of the frame member, the thickness is thin so as to form a step portion on the lower surface side of the frame member.

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