JP5456714B2 - Base-isolated floor structure - Google Patents

Description

  The present invention, for example, is used to prevent a building vibration or displacement due to an earthquake or the like from being transmitted directly to the floor panel or the like by performing a seismic isolation operation on the floor panel or the like placed thereon. It relates to the floor structure.

  As a conventional base isolation floor structure, as shown in FIG. 13, there was a base isolation floor structure composed of a base isolation frame 4 arranged on a flat foundation floor surface 11 of a concrete slab. This seismic isolation frame 4 is used to prevent the vibration and displacement of the building due to an earthquake or the like from being directly transmitted to the free access floor 6 when the free access floor 6 is mounted thereon (see FIG. Patent Document 1).

  As shown in FIG. 14, the seismic isolation frame 4 having such a conventional base isolation floor structure has a frame 8 formed so as to extend in the length direction (vertical direction in the figure). In order to be substantially parallel to each other, a plurality of them were arranged side by side in the direction perpendicular to the length direction (left and right direction in the drawing).

  As shown in FIG. 14, the frame 8 of the seismic isolation frame 4 is connected to each other by connecting members 10 at the end portions in the length direction, and can be extended by extending in the length direction. That is, the connecting member 10 has a U-shaped cross section as shown in FIG. 15, and both end portions in the length direction perpendicular to the cross section are spanned between the end portions in the length direction of the frame 8. The ends of the frame 8 are connected to each other.

  As shown in FIG. 14, a plurality of connecting ribs 12 of the seismic isolation frame 4 are arranged between the frames 8 such that the length direction extends in a horizontal direction substantially perpendicular to the length direction of the frame 8. When viewed from above, the frame 8 and the connecting ribs 12 form a large number of lattice frames. The brace 14 of the seismic isolation frame 4 was disposed on one diagonal line of the lattice frame formed by the frame 8 and the connecting rib 12.

  The frame 8 of the seismic isolation frame 4 is formed with a plurality of protruding portions 8a protruding in a plate shape on its side portions at predetermined intervals in the length direction, and through holes formed in the protruding portions 8a. It was connected with the connection rib 12 and the brace 14 via connection members, such as a bolt which passes along.

  Then, the frame 8 of the seismic isolation frame 4 is provided with a seismic isolation portion 60 having a ball bearing 16 as shown in FIG. 15 at the lower part of each position at regular intervals in the length direction. . Since the ball bearing 16 of the seismic isolation part 60 is configured to come into contact with the foundation floor surface 11 and roll, the seismic isolation frame 4 can freely move on the foundation floor surface 11 in any horizontal direction. It was.

  Further, the seismic isolation frame 4 having a conventional seismic isolation floor structure can be enlarged by connecting similar members in both the vertical and horizontal directions in FIG. By installing dampers and coil springs (not shown) at the four corners of the entire seismic isolation frame 4 expanded in this way, the vibration and displacement of the building due to earthquakes and the like are absorbed and the seismic isolation frame 4 moves in the horizontal direction. The damper or coil spring exerts a restoring force on the seismic isolation frame 4 that has moved relative to the wall of the room in which the seismic isolation frame 4 is installed. Can be returned to its original position relative to the wall of the room.

  As shown in FIG. 16, the free access floor 6 can be placed on the seismic isolation frame 4. The free access floor 6 is arranged on the same horizontal plane above the seismic isolation frame 4 and a plurality of floor panels 18 arranged in line so as to be adjacent to each other vertically and horizontally as viewed from above, and the floor panel 18 It was comprised by the support leg 20 which supports from below.

  The support legs 20 of the free access floor 6 are arranged such that one of the four corners of each of the four floor panels 18 whose planar shape is substantially square is arranged immediately below the position where it is concentrated in one place. Is connected to the lower end portion of the panel adjustment stand 20a on the same axis, and the lower end portion is attached to the frame 8 so as to stand upright from the upper surface 8b of the frame 8 of the seismic isolation frame 4. And fixed leg portions 20b.

  According to the seismic isolation frame 4 having such a conventional seismic isolation floor structure, the seismic isolation frame 4 can move horizontally on the foundation floor surface 11 when an earthquake or the like occurs, so that the free access floor 6 In addition, it is possible to perform seismic isolation such as transmitting vibrations and displacements of buildings due to earthquakes and the like without reducing them directly.

JP 2005-48400 A

  However, the conventional base-isolated floor structure includes a frame 8 that is added in the length direction by the connecting member 10 and arranged in a row in the horizontal direction perpendicular to the length direction. Because the seismic isolation frame 4 is arranged substantially in a room by connecting and expanding the connecting ribs 12 and braces 14 connected to the frame 8 by connecting similar members in both vertical and horizontal directions, There was a problem like this.

  In other words, the size and shape of the room of the building structure for which the seismic isolation frame 4 is to be installed differ from site to site, and the range in which the seismic isolation frame 4 is installed also varies from site to site. Therefore, it is necessary to manufacture the seismic isolation frame 4 by connecting the frame 8, the connecting member 10, the connecting rib 12 and the brace 14 for each installation site. There was a problem that it took.

  In addition, the conventional seismic isolation frame 4 has a structure in which the frame 8, the connecting member 10, the connecting rib 12, and the brace 14 are connected to each other, so that a part thereof is removed or removed after installation. There is a problem that it is not easy to attach a part to the original position again.

  For this reason, the conventional seismic isolation frame 4 has a problem that the installation layout cannot be easily changed after the installation.

  Therefore, in view of the above-mentioned problems, the labor and cost for attaching and removing the whole or a part thereof are reduced regardless of the size and size of the room of the building structure in which it is installed and the installation range in the room. An object of the present invention is to provide a seismic isolation floor structure that can be easily changed even after it is installed.

In order to solve the above problems, the seismic isolation floor structure according to the present invention is:
Have a seismic isolation unit in a lower portion, by the end portions of the plurality of frames are joined together, comprising a plurality of seismic isolation structure to which the planar shape is formed in a frame-like,
The seismic isolation structure protrudes from the outer peripheral surface so as to extend outward in the vertical direction and in the horizontal direction, and has a plurality of connecting portions formed at both ends in the length direction of the frame,
One connecting portion provided at one end of the frame of the base isolation structure is inserted between two connecting portions provided at one end of a frame of another base isolation structure that is adjacent in the horizontal direction. These connecting portions are screwed to each other by connecting means .

Moreover, the seismic isolation floor structure according to the present invention is:
A base isolation frame having a base isolation part at the bottom is detachably connected to the base isolation structure adjacent in the horizontal direction .

Moreover, the seismic isolation floor structure according to the present invention is:
The seismic isolation part has a low friction body such as a ball bearing.

According to such a base-isolated floor structure of the present invention,
By having a seismic isolation part at the bottom and connecting multiple seismic isolation structures horizontally adjacent to each other,
Regardless of the size and shape of the room of the building structure where the seismic isolation floor structure is installed, and the installation range in the room, it is possible to reduce the labor and cost related to the whole or part of the installation / removal work. Even after installation, the installation layout can be easily changed.

It is the upper surface schematic diagram which shows the seismic isolation floor structure 40 which concerns on the 1st Embodiment of this invention. FIG. 2 is a schematic top view showing a state where a plurality of seismic isolation frames 42 in the center of the base isolation floor structure 40 shown in FIG. 1 are removed. It is a top view which shows the seismic isolation frame 42 which comprises some seismic isolation floor structures 40 shown in FIG. It is A arrow directional view of the seismic isolation frame 42 shown in FIG. It is a B arrow view of the seismic isolation frame 42 shown in FIG. It is C arrow line view of the seismic isolation frame 42 shown in FIG. FIG. 7A is an enlarged view showing a connection portion between a plurality of seismic isolation frames 42 in the base isolation floor structure 40 shown in FIG. 1, and FIG. 7A is one of four corners of each of the four seismic isolation frames 42. FIG. 7B is a partial cross-sectional enlarged top view in which the circular portion D in FIG. 7A is enlarged. It is a front view of the seismic isolation floor structure 40 combined with the free access floor 6. FIG. It is the upper surface schematic diagram which shows the seismic isolation floor structure 70 which concerns on the 2nd Embodiment of this invention. It is a front view of the seismic isolation stand 72 arrange | positioned in the center part of the base isolation floor structure 70 shown in FIG. FIG. 10 is a top view in which a part of the seismic isolation frame 72 shown in FIG. 9 is broken to shorten the length. FIG. 10 is a partial cross-sectional front view taken along the line FF in FIG. 9 in a state where the seismic isolation floor structure 70 is combined with the free access floor 6. It is a front view which shows the seismic isolation frame 4 which is the conventional base isolation floor structure. It is a top view of the seismic isolation frame 4 shown in FIG. FIG. 15 is an enlarged sectional view taken along line E-E in the seismic isolation frame 4 shown in FIG. 14. It is a front view of the seismic isolation frame 4 combined with the free access floor 6. FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the seismic isolation floor structure which concerns on this invention is demonstrated concretely based on drawing.

  FIGS. 1-8 is a figure referred in order to demonstrate the seismic isolation floor structure 40 which concerns on the 1st Embodiment of this invention. In the seismic isolation floor structure 40 shown in these drawings, the same parts as those in the conventional base isolation floor structure are denoted by the same reference numerals, and overlapping description of the same configuration as the conventional one is omitted except for a part. It shall be.

  As shown in FIG. 1, the base-isolated floor structure 40 according to the first embodiment of the present invention is arranged on a horizontal and flat foundation floor surface 11 of a concrete slab so as to be adjacent to each other vertically and horizontally. It is comprised by the seismic isolation frame 42 (seismic isolation structure) arrange | positioned.

  The seismic isolation frame 42 of the seismic isolation floor structure 40 has a substantially square planar shape and is detachably connected to another seismic isolation frame 42 that is vertically and horizontally adjacent thereto. As shown in FIG. 2, from the seismic isolation floor structure 40 constituted by a plurality of seismic isolation frames 42 as shown in FIG. By releasing the connection and fixation with the seismic frame 42, it can be removed individually.

  As shown in FIG. 3, the base isolation frame 42 of the base isolation floor structure 40 has two frames 44 and 46 formed so as to extend in the length direction (vertical direction). The frames 44 and 46 are arranged so as to be parallel to each other in a horizontal direction perpendicular to the length direction of the frames 44 and 46 and facing each other.

  The two frames 48 and 50 of the seismic isolation frame 42 extend in the horizontal direction substantially perpendicular to the length direction of the frames 44 and 46 so that both end portions of the frames 44 and 46 extend. And both ends of the frames 48 and 50 are abutted against the side surfaces of both ends of the frames 44 and 46, respectively, and are integrally formed with the frames 44 and 46 by welding. It is fixed.

  For this reason, as shown in FIG. 3, the frame body of the seismic isolation frame 42 constituted by the frames 44, 46, 48, 50 has a substantially square outer shape when viewed from above and has a square shape in plan view. It is formed in a shape.

  As shown in FIG. 3, the frame 44 of the seismic isolation frame 42 has an outer side perpendicular to and horizontal from the outer surface on one end side (lower side in the figure) in the length direction. One connecting portion 44a protruding so as to extend is provided.

  As shown in FIGS. 4 and 6, a through hole 44c is formed at the distal end portion of the connecting portion 44a. The through hole 44c passes through an axis parallel to the length direction of the frame 44 from which the distal end portion protrudes.

  Further, as shown in FIG. 3, the frame 44 of the seismic isolation frame 42 is spaced apart from each other in the length direction of the frame on the other end side in the length direction (upper side in the figure). Two connecting portions 44b are provided so as to protrude from the outer surface so as to extend outward in the vertical and horizontal directions.

  As shown in FIG. 6, a through-hole 44d is formed at the tip of the two connecting portions 44b. The through-hole 44d passes through an axis parallel to the length direction of the length direction 44 of the frame protruding from the tip. ing.

  Further, as shown in FIGS. 3 to 6, each of the frames 46, 48 and 50 of the seismic isolation frame 42 has the same configuration as the frame 44. In other words, the frames 46, 48, 50 of the seismic isolation frame 42 correspond to one connecting portion 46a, 48a, 50a, 2a corresponding to one connecting portion 44a, two connecting portions 44b, and through holes 44c, 44d of the frame 44. Two connecting portions 46b, 48b, 50b and through holes 46c, 48c, 50c, 46d, 48d, 50d are provided, respectively.

  Also, as shown in FIG. 3, the frames 44 and 46 of the seismic isolation frame 42 protrude from the inner surface to extend inward in the vertical direction at positions spaced apart by a predetermined distance in the length direction. A plurality of plate-like protrusions 44e and 46e are provided.

  The brace 52 of the seismic isolation frame 42 is disposed on one diagonal line of the frame formed by the frames 44, 46, 48, 50, and is formed on the protrusions 44e, 46e of the frames 44, 46. It is connected to the frames 44 and 46 through connecting members such as bolts passing through the through holes.

  Further, as shown in FIGS. 4 to 6, the seismic isolation portion 60 is attached to each of the frames 44 and 46 of the seismic isolation frame 42, at the positions of the lower portions thereof at almost both end portions in the length direction. It is like that.

  The seismic isolation part 60 is provided with ball bearings 54 in the lower part thereof, and these ball bearings 54 can come into contact with the foundation floor 11 and roll, so that the seismic isolation frame 42 has a foundation. It can move freely on the floor surface 11 in any horizontal direction.

  In the seismic isolation floor structure 40 according to the present embodiment, as shown in FIG. 1, the seismic isolation frame 42 is arranged on the horizontal plane on the upper surface of the foundation floor 11 so as to be adjacent to each other vertically and horizontally. It arrange | positions and it connects with each other so that attachment or detachment is possible.

  7A, one connecting portion 44a of the frame 44 of the seismic isolation frame 42 is connected to two connecting portions 46b of the frame 46 of another adjacent seismic isolation frame 42 with bolts. It is connected via a nut.

  7A, one connecting portion 46a of the frame 46 of the seismic isolation frame 42 is connected to two connecting portions 44b of the frame 44 of another adjacent seismic isolation frame 42 with bolts. It is connected via a nut.

  Further, as shown on the right side of FIG. 7A, one connecting portion 48a of the frame 48 of the seismic isolation frame 42 is connected to two connecting portions 50b of the frame 50 of another adjacent seismic isolation frame 42, or 7A, one connecting portion 50a of the frame 50 of the seismic isolation frame 42 is bolted to two connecting portions 48b of the frame 48 of another adjacent seismic isolation frame 42, respectively. And are connected via a nut.

  The connection means between one connecting part of the seismic isolation frame 42 and two connecting parts of another adjacent seismic isolation frame 42 will be specifically described. As shown in FIG. The tip of one connecting portion 46a of the frame 46 is inserted between the two connecting portions 44b of the frame 44 of another adjacent seismic isolation frame 42.

  7A, and as shown in FIG. 7B, through holes 44d, 46c, 44d formed in the connecting portions 44b, 46a of the frames 44, 46 of the seismic isolation frame 42. The male screw tip of the bolt 56 (connecting means) that passes through the screw is fastened to the female screw of the nut 58 (connecting means), so that one connecting portion 46a of the frame 46 of the seismic isolation frame 42 and another adjacent The two connecting portions 44b of the frame 44 of the seismic isolation frame 42 are connected.

  Each of the one connecting portion 48a of the frame 48, one connecting portion 50a of the frame 50, and one connecting portion 44a of the frame 44 is also connected to the two connecting portions 50b of the frame 50 and the two connecting portions of the frame 48 by the screw fastening. The part 48b and the frame 46 are connected to each of the two connecting parts 46b.

  Further, as in the conventional seismic isolation frame 4, the seismic isolation floor structure 40 includes dampers and coil springs (not shown) between the corners of the seismic isolation frames 42 at the four corners and the walls and corners of the room. Can be installed.

  As shown in FIG. 8, the seismic isolation frame 42 of the base isolation floor structure 40 has the free access floor 6 placed thereon, and the lower end of the support leg 20 is the frame 44 of the base isolation frame 42 or It is fixed on the frame 46.

  The free access floor 6 is disposed on the same horizontal plane above the seismic isolation frame 42, and a plurality of floor panels 18 arranged in a row so as to be adjacent to each other vertically and horizontally as viewed from above. It is comprised by the support leg 20 which supports the panel 18 from the bottom.

  The support legs 20 of the free access floor 6 are arranged directly below the locations where the four corners of each of the four floor panels 18 having a substantially square shape are concentrated in one place. The panel adjustment base 20a supported from the lower side and the lower end of the panel adjustment base 20a are connected on the same axis, and the lower end thereof is erected on the upper surface of the frame 44 or 46 of the seismic isolation frame 42. And a leg portion 20b fixed on 44 or 46.

  Such a base-isolated floor structure 40 is configured by connecting base-isolated frames 42 having ball bearings 54 that can roll in contact with the foundation floor surface 11 to each other at their connecting portions. Therefore, a plurality of seismic isolation frames 42 are integrated and can freely move on the foundation floor 11 in any horizontal direction.

  Moreover, since the seismic isolation floor structure 40 is comprised by connecting the seismic isolation frames 42 in those connection parts, the seismic isolation floor produced beforehand in the field where the base isolation floor structure 40 is installed. Since the seismic isolation floor structure 40 can be assembled simply by arranging the frames 42 one by one and connecting them at their connecting portions, the installation work of the base isolation floor structure 40 can be facilitated.

  Moreover, since the magnitude | size of the seismic isolation floor structure 40 can be changed by increasing / decreasing the number of the seismic isolation frames 42 mutually connected, the area of a room, a shape, and the installation range are set for every installation site. Even different things can be handled.

  The seismic isolation floor structure 40 is configured by detachably connecting the seismic isolation frames 42 to each other by screw fastening with bolts 56 and nuts 58 at their connecting portions. In this case, the seismic isolation frame 42 can be disconnected from another seismic isolation frame 42 by loosening and removing the screws 56 and nuts 58, so that the seismic isolation floor structure 40 can be released. Can be easily removed.

  Further, it is possible to easily attach the seismic isolation frame 42 again to the place where the seismic isolation frame 42 is removed.

  For this reason, even after the seismic isolation floor structure 40 is installed, the installation layout of the seismic isolation frame 42 can be freely changed.

  As described above, according to the seismic isolation floor structure 40 according to the first embodiment of the present invention, the size and shape of the room of the building structure in which the seismic isolation floor structure 40 is installed, and its installation range in the room Regardless of this, the whole or a part of the seismic isolation floor structure 40 can be easily attached and detached, and the labor and cost for the installation and removal work of the seismic isolation floor structure 40 can be reduced. .

  Further, even after the base isolation floor structure 40 is installed, the installation layout of the base isolation frame 42 can be easily changed by attaching and removing the base isolation frame 42.

  Next, FIGS. 9 to 12 are views referred to for explaining the seismic isolation floor structure 70 according to the second exemplary embodiment of the present invention.

  As shown in FIG. 1, the seismic isolation floor structure 40 according to the first embodiment is composed of a seismic isolation frame 42 that is arranged in a row so as to be adjacent to each other vertically and horizontally, whereas As shown in FIG. 9, the seismic isolation floor structure 70 according to the present embodiment has the seismic isolation frame 42 at the center thereof removed, and a base isolation frame 72 is disposed on the foundation floor 11. 3 is different from the base-isolated floor structure 40 according to the first embodiment.

  The base isolation frame 72 of the base isolation floor structure 70 has a substantially rectangular plane shape and is detachably connected to a plurality of base isolation frames 42 that are vertically and horizontally adjacent to each other. The seismic isolation frame 72 that is positioned can be individually detached from the foundation floor 11 by releasing the connection with the adjacent seismic isolation frame 42.

  As shown in FIGS. 10 and 11, the base isolation frame 72 of the base isolation floor structure 70 is a long steel member, and angle members 74, 76, 78, 80, 82 having an L-shaped cross section, Combined to extend in the three directions of length, width, and height, the parts that contact each other are fixed by screw fastening or welding, so that the inside of the line connecting the corners of the outer shape becomes a rectangular parallelepiped A frame body 84 is formed.

  Such a base isolation frame 72 is sufficiently supported on the upper surface 18a of the floor panel 18 of the free access floor 6 fixed on the base isolation frame 42 in the base isolation floor structure 40 according to the first embodiment. For example, a device or device having a large shape or weight (hereinafter referred to as a device) such as a large server that cannot be mounted on the upper surface can be fixed.

  As shown in FIG. 10, the seismic isolation pedestal 72 has a longitudinal direction of a lower angle member 76 arranged so that the cross-sectional shape is symmetrical below the upper angle member 74 of the frame 84 (upper and lower in FIG. 11). A seismic isolation portion 86 is attached to each of the bottom surfaces at a certain distance in the direction).

  The seismic isolation part 86 is provided with a ball bearing 88 at the lower part thereof, and the ball bearing 88 is configured to come into contact with the foundation floor surface 11 to roll. It can move freely in any horizontal direction.

  As shown in FIGS. 10 and 11, the seismic isolation frame 72 is similar to the one connection portion 44 a, 46 a, 48 a, 50 a in the first embodiment on the lower end side of the outer peripheral side surface of the frame body 84. And the two connecting portions 84b having the same configuration as the two connecting portions 44b, 46b, 48b, and 50b in the first embodiment are formed from the outer peripheral side surface of the frame body 84, respectively. It protrudes so as to extend outward in the vertical horizontal direction, and a plurality of sets are provided at positions spaced apart from each other.

  Further, as shown in FIG. 10, through holes 84c and 84d through which a horizontal axis parallel to the outer peripheral side surface of the frame 84 passes are formed at the distal ends of the one connecting portion 84a and the two connecting portions 84b. ing.

  In the base isolation frame 72, one connecting portion 84a provided on the frame 84 is connected to one of the two connecting portions 44b, 46b, 48b, 50b of the base isolation frame 42 in the first embodiment. They are detachably connected to each other by connection means similar to the connection means. Further, the two connecting portions 84b of the frame 84 are detachably connected to any one of the connecting portions 44a, 46a, 48a, 50a of the seismic isolation frame 42 by the connecting means. ing.

  Such a base isolation floor structure 70 is configured by connecting the base isolation frame 42 having the ball bearings 54 and the base isolation frame 72 having the ball bearings 88 at their connecting portions. The seismic isolation frame 42 and the seismic isolation frame 72 are united so that they can move freely on the foundation floor 11 in any horizontal direction.

  Further, as shown in FIGS. 10 and 11, the seismic isolation frame 72 is an elongated member made of steel at the upper end side of the outer peripheral side surface of the frame 84, and angle members 90 and 92 having an L-shaped cross section are The frame 84 contacts with the vertical side of the two inverted L-shaped sides of the cross section and is fixed by welding.

  As shown in FIG. 12, the seismic isolation frame 42 of the seismic isolation floor structure 70 has the free access floor 6 mounted thereon and supports the same as the seismic isolation frame 42 in the first embodiment. The lower end of the leg 20 is fixed on one of the corresponding frames 44, 46, 48, 50 of the seismic isolation frame 42.

  At this time, the floor panel of the free access floor 6 is placed on the upper surface of the horizontal side of the two inverted L-shaped sides of the angle members 90 and 92 fixed to the outer periphery of the base isolation frame 72 in the horizontal direction. 18 can be placed, and the base isolation frame 72 and the free access floor 6 are integrated so that there is no gap between them.

  Also, as shown in FIG. 12, the height of the upper surface of the angle member 74 of the frame 84 of the base isolation frame 72 is the height of the upper surface 18a of the floor panel 18 of the free access floor 6 fixed on the base isolation frame 42. Therefore, the upper surface of the angle member 74 and the upper surface of the floor panel 18 are formed on the same horizontal plane.

  Further, a portion of the seismic isolation base 72 fixed to the upper surface of the angle members 90 and 92 by contacting the lower surface of the floor panel 18 of the free access floor 6 is located below the fixed floor panel 18 under the free access floor. Since it is not necessary to provide the six support legs 20, the number of parts can be reduced.

  According to such a base-isolated floor structure 70 according to the present embodiment, as in the effect of the base-isolated floor structure 40 according to the first embodiment, the building structure where the base-isolated floor structure 70 is installed. Regardless of the size and shape of the room and the installation range in the room, the whole or part of the seismic isolation floor structure 70 can be easily attached and removed, and the labor involved in the attachment and removal work can be reduced. Cost can be reduced.

  Even after the seismic isolation floor structure 70 is installed, the installation layout of the seismic isolation frame 42 and the seismic isolation rack 72 can be easily changed by attaching and removing the seismic isolation frame 42.

  In addition, depending on the base isolation floor structure 70 according to the present embodiment, it is possible to place and fix the devices having the large size and weight as described above on the base isolation base 72, thereby generating an earthquake or the like. In some cases, the seismic isolation frame 72 performs a seismic isolation operation to reduce the vibration and displacement of the building transmitted to the devices, and the devices placed on the seismic isolation frame 72 can be Can be prevented from moving or falling.

  The base isolation frame 42 in the base isolation floor structure 40 according to the first embodiment or the base isolation base 72 in the base isolation floor structure 70 according to the second embodiment is a horizontal and flat concrete slab. It was supposed to be placed on the foundation floor 11, but instead, a metal plate such as a stainless steel plate was laid on the concrete slab, and the smooth surface of the upper surface was used as the foundation floor. A seismic isolation stand 72 or the like may be arranged thereon.

  By using the smooth surface of the upper surface of a metal plate such as a stainless steel plate as the foundation floor surface, a foundation floor surface that is smoother than the upper surface of the concrete slab can be easily provided, and the seismic isolation frame 42 can be exempted. The ball bearing 54 provided in the lower part of the seismic part 60 and the ball bearing 88 provided in the lower part of the seismic isolation part 86 of the seismic isolation rack 72 can be rolled more smoothly than in the case of a concrete slab.

  The seismic isolation frame 42 in the base isolation floor structure 40 according to the first embodiment or the base isolation frame 72 in the base isolation floor structure 70 according to the second embodiment includes the base isolation part 60. , 86 are provided with ball bearings 54, 88, but if the friction against the foundation floor can be reduced, a low friction body other than the ball bearing can be provided. It may be.

  Further, the base isolation frame 42 in the base isolation floor structure 40 according to the first embodiment or the base isolation base 72 in the base isolation floor structure 70 according to the second embodiment is exempted in the horizontal direction. It has been designed to have a seismic isolation part that can perform seismic motion, but it has a seismic isolation part that can perform seismic isolation not only in the horizontal direction but also in the vertical direction. It may be.

  Further, the base isolation frame 42 in the base isolation floor structure 40 according to the first embodiment has a substantially square outer shape when viewed from above by combining the frames 44, 46, 48, 50, and The planar shape was formed in the shape of a square, but if it is configured to enjoy the effects of the present invention, using any other seismic isolation frame Also good.

  Further, in the base isolation frame 72 in the base isolation floor structure 70 according to the second embodiment, the frame 84 is an elongated member made of steel, and the angle members 74, 76, 78 having an L-shaped cross section. , 80 and 82 are combined so that the inside of the line connecting the corners of the outer shape is a rectangular parallelepiped. However, as long as it is configured to receive the effects of the present invention, any other You may use the base isolation frame of the structure.

  In addition, the seismic isolation frame 42 in the first embodiment is configured such that the male thread tip end of the bolt 56 is screwed to the female screw of the nut 58 so that the seismic isolation frames 42 are connected to each other. However, as long as it is configured so as to be able to enjoy the effects of the invention, for example, a structure in which a convex part having the same cross section (reverse wedge shape) is fitted to a dovetail concave part having a trapezoidal cross section, etc. Any other connecting portion configuration or connecting means may be used.

  In addition, one seismic isolation stand 72 in the second embodiment is arranged on the foundation floor 11 and connected to the seismic isolation frame 42. As in the case of the seismic frame 42, another seismic isolation frame 72 adjacent vertically and horizontally may be arranged, or a plurality of seismic isolation frames 72 may be detachably connected to each other. Good.

  Moreover, although the seismic isolation stand 72 was arranged at the center of the plurality of seismic isolation frames 42, other than the central part of the plurality of seismic isolation frames 42, such as the corners of the plurality of seismic isolation frames 42. It may be arranged at a position.

4 seismic isolation frame 6 free access floor 8 frame 8a protrusion 8b upper surface 10 connecting member 11 foundation floor 12 connecting rib 14 brace 16 ball bearing 18 floor panel 18a upper surface 20 support leg 20a panel adjustment stand 20b leg 40 seismic isolation floor structure 42 Seismic isolation frame 44 Frame 44a, 44b Connecting portion 44c, 44d Through hole 44e Protruding portion 46 Frame 46a, 46b Connecting portion 46c, 46d Through hole 46e Protruding portion 48 Frame 48a, 48b Connecting portion 48c, 48d Through hole 50 Frame 50a, 50b connecting part 50c, 50d through hole 52 brace 54 ball bearing 56 bolt 58 nut 60 base isolation part 70 base isolation floor structure 72 base isolation frame 74, 76, 78, 80, 82 angle member 84 frame body 84a, 84b connection 84c, 84d through-hole 86 MenShinbu 88 ball bearings 90, 92 angle member

Claims (3)

Have a seismic isolation unit in a lower portion, by the end portions of the plurality of frames are joined together, comprising a plurality of seismic isolation structure to which the planar shape is formed in a frame-like,
The seismic isolation structure protrudes from the outer peripheral surface so as to extend outward in the vertical direction and in the horizontal direction, and has a plurality of connecting portions formed at both ends in the length direction of the frame,
One connecting portion provided at one end of the frame of the base isolation structure is inserted between two connecting portions provided at one end of a frame of another base isolation structure that is adjacent in the horizontal direction. A base-isolated floor structure in which these connecting portions are screwed together by connecting means . The base isolation floor structure according to claim 1, wherein a base isolation base having a base isolation part at a lower part is detachably connected to the base isolation structure adjacent in a horizontal direction .   The seismic isolation floor structure according to claim 1 or 2, wherein the seismic isolation part has a low friction body such as a ball bearing.

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