JP5279798B2 - Base-isolated floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base-isolated floor structure which can prevent equipment and the like, disposed in an upper section thereof, from being displaced or upset by earthquakes and the like, which can reduce costs required for installation of the equipment and the like, which can prevent a hindrance to operability of the equipment and the like, and which enables the equipment and the like to undergo a base-isolating operation. <P>SOLUTION: A base-isolated floor structure includes a base-isolated structure 24 disposed on a foundation floor surface 11, and a support frame 42 integrally provided on the base-isolated structure 24. The base-isolated floor structure can prevent equipment and the like, disposed in an upper section thereof, from being displaced or upset by earthquakes and the like, can reduce costs required for installation of the equipment and the like, can prevent a hindrance to operability of the equipment and the like, and enables the equipment and the like to undergo a base-isolating operation. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention provides a seismic isolation floor that is used to prevent vibrations and displacements such as earthquakes from being directly transmitted to the free access floor, etc. Concerning structure.

  As a conventional base isolation floor structure, as shown in FIG. 7, there was a base isolation floor structure including a base isolation frame 4 arranged on a flat foundation floor 11. This seismic isolation frame 4 has been used to prevent vibrations and displacements such as earthquakes from being directly transmitted to the free access floor 6 when the free access floor 6 is mounted thereon (see Patent Document 1). ).

  As shown in FIG. 8, the seismic isolation frame 4 having such a conventional seismic 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.

  The frame 8 of the seismic isolation frame 4 has a U-shaped cross section as shown in FIGS. 7 and 9, and the end portions in the length direction are connected to each other as shown in FIGS. It was connected by the member 10, and was able to extend by extending in the length direction.

  That is, the connecting member 10 is formed in a U-shaped cross section so that the cross-sections of the frames 8 adjacent to each other in the lengthwise direction overlap the outside of the U-shaped end portion. By being fixed over both ends, the frames 8 adjacent to each other in the length direction can be added in the length direction.

  A plurality of connecting ribs 12 of the seismic isolation frame 4 are arranged side by side between the frames 8 so that the length direction of the connecting ribs 12 extends in a direction substantially perpendicular to the length direction of the frame 8. As shown in FIG. 2, the frame 8 and the connecting ribs 12 form a large number of lattice frames when viewed from above. 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.

  The frame 8 of the seismic isolation frame 4 is provided with a plurality of ball bearings 16 as shown in FIG. 9 at a position below the position spaced apart in the length direction. Since these ball bearings 16 come into contact with the foundation floor 11 and roll, the seismic isolation frame 4 can move freely on the foundation floor 11 in any horizontal direction.

  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 attaching dampers and coil springs (not shown) to the four corners of the entire seismic isolation frame 4 thus enlarged, the seismic isolation frame 4 moves in the horizontal direction by absorbing vibrations and displacements such as earthquakes. In addition, the damper and coil spring exert a restoring force on the seismic isolation frame 4 that has moved in the horizontal direction relative to the room in which the seismic isolation frame 4 is installed. It was possible to return to the original relative position.

  On the other hand, as shown in FIG. 10, the free access floor 6 can be placed on the seismic isolation frame 4. The free access floor 6 has a plurality of floor panels 18 arranged on the same horizontal surface above the seismic isolation frame 4 so as to be adjacent to each other vertically and horizontally as viewed from above, and the floor panel 18. It is comprised by the support leg 20 which supports this from the bottom.

  The support leg 20 of the free access floor 6 supports the four corners of the floor panel 18 whose planar shape is substantially square from the lower side, and the planar shape of the planar adjustment plate formed in a circular or rectangular shape. 20a, and a leg portion 20b that is connected to the lower end portion of the panel adjustment base 20a on the same axis and has a lower end portion fixed to the frame 8 so as to stand upright from the upper surface 8b of the frame 8 of the seismic isolation frame 4.

  According to the seismic isolation frame 4 having such a conventional seismic isolation floor structure, when the earthquake or the like occurs, the seismic isolation frame 4 moves in the horizontal direction. It was possible to perform seismic isolation such as transmitting displacements without reducing them directly.

Japanese Patent No. 4279075

  In the conventional base-isolated floor structure, as shown in FIG. 7, the base-isolated frame 4 is arranged on the foundation floor surface 11, and on the base-isolated frame 4, as shown in FIG. 6 is installed, for example, when a device such as a large server or a device (hereinafter referred to as “equipment”) is installed in the room, it is placed on the upper surface 18a of the floor panel 18 of the free access floor 6. become.

  If these devices are simply placed on the upper surface 18 a of the floor panel 18 of the free access floor 6 on the seismic isolation frame 4, the seismic isolation frame 4 swings and moves on the floor panel 18 in the event of an earthquake or the like. May be fixed to the floor panel 18 because it may move or fall over.

  However, since the floor panel 18 may be removed from the support leg 20 in order to use the underfloor space below the floor panel 18 after the laying of the free access floor 6, the floor panel 18 is placed on the support leg 20. In general, a panel-free structure that can be detachably mounted on a panel is adopted.

  In such a panel-free type free access floor 6, the floor panel 18 is merely placed on the support leg 20, so that the seismic isolation frame in which vibrations and displacement transmitted to the equipment due to an earthquake or the like are located below is provided. 4, the floor panel 18 to which the devices are fixed may be lifted from the support leg 20.

  Therefore, there is a problem that the devices cannot be prevented from moving or falling due to an earthquake or the like simply by being fixed to the floor panel 18 of the panel-free free access floor 6.

  For this reason, when installing devices on the free access floor 6, for example, it may be possible to adopt a panel fixing type structure in which the four corners of the floor panel 18 are fixed to the support legs 20. However, it is necessary to use an uncommon special floor panel different from the panel-free type floor panel 18, and in order to use an underfloor space below the floor panel 18 after laying, etc. Since it is necessary to release the fixing of the 18 to the support legs 20, there is a problem that it takes time and effort.

  Moreover, when installing equipment on the floor panel 18, it is necessary to attach and detach the floor panel 18 or to process it, and it takes time and effort to increase the cost of the installation. There was a problem.

  For this reason, it is conceivable to install the devices directly on the foundation floor surface 11, but there is a problem that the devices cannot be installed at a position where the seismic isolation frame 4 or the free access floor 6 is located.

  Even if a place without the seismic isolation frame 4 and the free access floor 6 is created and such devices are directly installed on the foundation floor surface 11 of the place, the floor panels 18 of the surrounding free access floor 6 When the devices are installed at a position lower than the upper surface 18a, there is a problem that inconvenience in operation of the devices occurs.

  Further, as described above, when the equipment is installed directly on the foundation floor surface 11, the seismic isolation frame 4 is not provided between the equipment and the foundation floor surface 11. There was a problem that the seismic frame 4 could not be used for seismic isolation.

  Therefore, in view of the above problems, the present invention can prevent the devices arranged in the upper part from moving or toppling due to an earthquake or the like, and can reduce the cost for installing the devices. An object of the present invention is to provide a seismic isolation floor structure that can prevent the operability of equipment from being damaged and that allows the equipment to undergo seismic isolation.

In order to solve the above problems, the seismic isolation floor structure according to the present invention is:
A plurality of frames in which the length directions of the frames are arranged substantially in parallel, a connecting rib that connects the frames in the width direction, and a bearing support member that supports a bearing provided in a lower portion of the frame; A base-isolated structure in which the frame and the connecting rib are arranged along a foundation floor surface;
A support frame that has a substantially rectangular parallelepiped structure whose outer dimension in the horizontal direction is smaller than the outer dimension in the horizontal direction of the base isolation structure, and is provided integrally or detachably on the base isolation structure. It is characterized by having.

Moreover, the seismic isolation floor structure according to the present invention is:
The support frame is formed by combining angle members having an L-shaped cross section .

Moreover, the seismic isolation floor structure according to the present invention is:
The angle member at the lower part of the support frame is installed only on the frame of the seismic isolation structure.

Moreover, the seismic isolation floor structure according to the present invention is:
A free access floor is provided in an area where the support frame is not provided on the seismic isolation structure.

According to such a base-isolated floor structure of the present invention,
By providing the base isolation structure disposed on the foundation floor and the support frame integrally provided on the base isolation structure,
It is possible to prevent equipment placed on the support frame from moving or falling over due to an earthquake, etc., reducing the cost of equipment installation, and damaging the operability of equipment. And the devices can receive seismic isolation.

It is a front view which shows the seismic isolation floor structure 40 which concerns on one embodiment of this invention. It is a top view of the seismic isolation floor structure 40 shown in FIG. FIG. 3 is a top view of the support frame 42 shown in FIG. 1. FIG. 4A is a front view of the support frame 42, and FIG. 4B is a cross-sectional view of the support frame 42 taken along line AA in FIG. 3. 5A and 5B are views showing one of the frame bodies 50 shown in FIG. 3, in which FIG. 5A is a top view thereof, FIG. 5B is a side view thereof, and FIG. 5C is a frame in FIG. It is a B arrow view of the body 50. FIG. It is a front view which shows the seismic isolation floor structure 40 shown in FIG. 1, and the free access floor 6 collectively. 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. It is CC sectional view expanded sectional drawing in the seismic isolation frame 4 shown in FIG. It is a front view which shows the seismic isolation frame 4 and the free access floor 6 shown in 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.

  FIG. 1 to FIG. 6 are diagrams which are referred to for explaining a seismic isolation floor structure 40 according to an embodiment of the present 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 seismic isolation floor structure 40 according to an embodiment of the present invention has a base isolation frame 24 (base isolation structure) disposed on the foundation floor 11. A ball bearing 16 provided at the lower portion of the frame 8 can be brought into contact with the foundation floor surface 11 to roll. The seismic isolation frame 24 has the same configuration as the seismic isolation frame 4 which is the conventional seismic isolation floor structure.

  As shown in FIGS. 1 and 2, the seismic isolation floor structure 40 is configured such that a support frame 42 is placed and fixed above the upper surface 8 b of the frame 8 of the seismic isolation frame 24.

  As shown in FIGS. 3 and 4 (a) and 4 (b), the support base 42 of the seismic isolation floor structure 40 is made of steel and has an L-shaped section 44, 46, 48, 52, 54. , 56 (long members) are combined so as to extend in three directions of length, width, and height, and the portions in contact with each other are fixed by screw fastening or welding, thereby connecting the corners of the outer shape. The inside of the line is formed in a rectangular parallelepiped shape.

  That is, as shown in FIG. 3, the support frame 42 of the base isolation floor structure 40 is formed in a substantially rectangular frame shape having a length in the vertical direction in FIG. The two frame bodies 50 are connected to each other in the length direction of the support frame 42 and are spaced from each other so that the length directions thereof are substantially parallel to each other. And a plurality of rows are arranged side by side.

  As shown in FIGS. 5A to 5C, the frame 50 of the support frame 42 includes a lower angle member 44 and an upper angle member disposed so that the cross section is symmetrical above the lower angle member 44. 46 and a connecting angle member 48 as described below are combined.

  That is, the connecting angle member 48 has its both ends in the length direction abutted and fixed to the upward surface 44a of the lower angle member 44 and the downward surface 46a of the upper angle member 46, whereby the lower angle member 44 is fixed. And the upper angle member 46 are connected to each other in the vertical direction.

  As shown in FIGS. 3 and 4A and 4B, the support frame 42 has a connection angle member 52, and the length direction of the connection angle member 52 is relative to the length direction of the frame body 50. 3 are arranged so as to extend in a substantially vertical direction, and each of the longitudinal ends of the frame 50 constituting the upper and lower ends of the support frame 42 in FIG. On one side, the outer surface of the side having a width in the vertical direction in FIG. 4A is fixed in contact.

  The support frame 42 includes a connection angle member 54, and the connection angle member 54 is disposed between the frame bodies 50 so that the length direction thereof is substantially perpendicular to the length direction of the frame body 50. 4B of the upper angle member 46 in which both ends in the length direction are the inner side surfaces of the side parallel to the length direction of the frame 50 out of the two L-shaped sides of the cross section of the connecting angle member 48. It is fixed in contact with the outer surface of the side in the middle vertical direction. For this reason, the connection angle member 54 connects the frame bodies 50 to each other in a direction substantially perpendicular thereto.

  3, among the plurality of frames 50 of the support frame 42, the outer vertical surface of the upper angle member 46 of the frame body 50 positioned on both ends in the width direction of the support frame 42 is shown in FIG. As shown, the outer vertical surface of the mounting angle member 56 whose section is arranged in an inverted L shape is fixed in contact.

  As shown in FIG. 1, the support frame 42 has a bottom surface of the lower angle member 44 of the frame 50 on the upper surface 8 b of the frame 8 of the seismic isolation frame 24 via a plate-like member (not shown). The seismic isolation frame 24 as shown in FIGS. 2 and 9 is placed at a position higher than the upper surface of the connecting member 10 and is integrally fixed to the frame 8 with bolts or the like.

  At this time, since the support frame 42 is detachably fixed to the seismic isolation frame 24, it can be attached and detached in the room where the seismic isolation frame 24 is installed. .

  Further, since the bottom surface of the lower angle member 44 of the frame body 50 is fixed only above the upper surface 8b of the frame 8 of the seismic isolation frame 24, the support frame 42 is installed on the support frame 42. When wiring the devices to be connected, other parts other than the frame 50 are not hindered.

  Further, the support frame 42 may be configured by only a plurality of parallelly arranged frames 50 fixed above the upper surface 8b of the frame 8 of the seismic isolation frame 24 and members that connect the frames 50 to each other. Therefore, the number of parts can be reduced and the weight can be reduced.

  As shown in FIG. 6, the free access floor 6 is placed around the support frame 42 fixed on the seismic isolation frame 24 in the horizontal direction, and the lower end portion of the support leg 20 is the seismic isolation frame 24. The frame 8 is fixed.

  At this time, free access is made to the upper surface of the horizontal side of the two sides of the inverted L-shaped cross section of the connection angle member 52 and the mounting angle member 56 fixed to the outer periphery in the horizontal direction of the support frame 42. The lower surface of the floor panel 18 of the floor 6 can be contacted and fixed, and the support frame 42 and the free access floor 6 can be integrated so that there is no gap between them.

  At this time, as shown in FIG. 6, the height of the upper surface of the upper angle member 46 of the frame 50 of the support base 42 is set to the upper surface 18 a of the floor panel 18 of the free access floor 6 fixed on the seismic isolation frame 24. It is almost the same as the height.

  Further, on the upper surface of the connection angle member 52 and the mounting angle member 56 of the support frame 42 and the lower surface of the floor panel 18 of the free access floor 6 is fixed in contact with the upper surface, the support legs 20 of the free access floor 6 are provided below. Therefore, the number of parts can be reduced.

  Around the seismic isolation floor structure 40, there is a seismic isolation frame 24 in which only the free access floor 6 is placed, as shown in FIG. 10, and the free access floor 6 as shown in FIG. Another seismic isolation frame 24 provided with the support frame 42 in the center can be appropriately selected and connected according to the layout of the room, and can be laid in the entire room or in a necessary area.

  As described above, according to the seismic isolation floor structure 40 according to the present embodiment, since the devices are not placed on the free access floor 6, the floor panel of the free access floor 6 is used. Since it is not necessary to increase the strength of 18 or the support leg 20, it is possible to prevent the weight from increasing by increasing the strength thereof.

  In addition, since the above-described devices can be mounted and fixed on the support frame 42, vibration transmitted to the devices by the seismic isolation frame 24 performing a seismic isolation operation in the event of an earthquake or the like. And the displacement can be reduced, and the seismic isolation frame 24 can be prevented from moving or toppling over due to the shaking motion.

  Moreover, since it is not necessary to attach and detach the floor panel 18 when placing the equipment, and it is not necessary to perform processing for installing the equipment on the floor panel 18, it does not take time and effort. The cost for installing the equipment can be reduced.

  In addition, since the devices as described above can be sufficiently supported on the support frame 42, it is not necessary to install the devices directly on the foundation floor surface 11, so that the floor of the surrounding free access floor 6 can be removed. Equipment is not installed at a position lower than the upper surface 18a of the panel 18, and it is possible to prevent inconvenience in operating heavy equipment.

  In addition, the above-described devices can be placed on the support frame 42, and the seismic isolation frame 24 is disposed between the support frame 42 and the foundation floor 11, so that the devices are The seismic isolation operation by the seismic isolation frame 24 can be sufficiently received.

  In addition, since the support base 42 has a structure having an opening, wiring of equipment can be performed using the opening, so that it is not necessary to provide a large hole for wiring in the floor panel 18. It is possible to prevent the processing from being time-consuming.

  The support frame 42 in the base isolation floor structure 40 according to the above embodiment is fixed on the base isolation frame 24 having a structure capable of performing base isolation in the horizontal direction. It may be fixed on a base isolation frame having a structure capable of performing base isolation in the vertical direction, or in the horizontal and vertical directions.

  Further, the support frame 42 in the base isolation floor structure 40 according to the above-described embodiment has two frame bodies 50 connected to each other in the length direction, and is spaced from the length direction in the vertical direction. However, the frame bodies 50 are arranged side by side without being connected two by two in the length direction. Alternatively, three or more frame bodies 50 may be arranged side by side in a state of being connected in the length direction.

  Further, the support frame 42 in the base isolation floor structure 40 according to the above embodiment has a plate-like shape (not shown) in which the bottom surface of the lower angle member 44 of the frame body 50 is on the upper surface 8b of the frame 8 of the base isolation frame 24. However, the lower angle member 44 is provided with a notch for avoiding the connecting member 10, for example. The bottom surface of the lower angle member 44 may be fixed in direct contact with the upper surface 8b of the frame 8 of the seismic isolation frame 24.

  Alternatively, the bottom surface of the lower angle member 44 of the support frame 42 may be fixed to the connecting rib 12 and the brace 14 of the seismic isolation frame 24.

  Moreover, it is not necessary to limit the height position of the bottom surface of the lower angle member 44 of the support base 42 as in the base-isolated floor structure 40 according to the above-described embodiment, and screw fastening means such as a jack, You may come to have the structure which can adjust the height position of the bottom face of the lower angle member 44 by other means.

  Further, the support frame 42 need not be limited to the structure according to the above-described embodiment, and any other support frame structure may be used.

  Further, although the support frame 42 in the base isolation floor structure 40 according to the above embodiment is arranged at the center of the base isolation frame 24, it is arranged at the corner of the base isolation frame 24. Alternatively, it may be arranged over the entire upper surface of the seismic isolation frame 24.

DESCRIPTION OF SYMBOLS 4 Seismic isolation frame 6 Free access floor 8 Frame 8a Protrusion part 8b Upper surface 10 Connection member 11 Foundation floor surface 12 Connection rib 14 Brace 16 Ball bearing 18 Floor panel 18a Upper surface 20 Support leg 20a Panel adjustment stand 20b Leg part 24 Isolation frame 40 Base-isolated floor structure 42 Support base 44 Lower angle member 44a Upward surface 46 Upper angle member 46a Downward surface 48 Connection angle member 50 Frame 52, 54 Connection angle member 56 Mounting angle member

Claims (4)

A plurality of frames in which the length directions of the frames are arranged substantially in parallel, a connecting rib that connects the frames in the width direction, and a bearing support member that supports a bearing provided in a lower portion of the frame; A base-isolated structure in which the frame and the connecting rib are arranged along a foundation floor surface;
A support frame that has a substantially rectangular parallelepiped structure whose outer dimension in the horizontal direction is smaller than the outer dimension in the horizontal direction of the base isolation structure, and is provided integrally or detachably on the base isolation structure. Seismic isolation floor structure characterized by having. The seismic isolation floor structure according to claim 1, wherein the support frame is configured by combining angle members having an L-shaped cross section . The base isolation structure according to claim 2, wherein the angle member at the lower part of the support base is installed only on the frame of the base isolation structure.   The seismic isolation floor structure according to any one of claims 1 to 3, wherein a free access floor is provided in an area where the support base is not provided on the base isolation structure.

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