JP6575570B2 - Seismic isolation floor and installation method - Google Patents

Description

  The present invention relates to a seismic isolation floor having a seismic isolation function in which equipment such as computers and servers installed in a room and machinery and equipment such as machines installed in a factory are installed, and a method of installing the same.

  With regard to a seismic isolation floor having a seismic isolation function in which machines and equipment such as computers and servers installed in rooms and machines installed in factories are installed, in Patent Document 1, for example, they are arranged on the foundation. Seismic isolation structure, and a seismic isolation floor provided with a free access floor composed of a plurality of floor panels arranged on the seismic isolation structure so as to be adjacent to each other vertically and horizontally as viewed from above A structure has been proposed.

JP 2012-97500 A

  By the way, for example, there is a method of installing a seismic isolation floor by disposing a plurality of free access panels (floor members) on a steel frame incorporating a steel frame. In this case, the steel frame and the free access panel are included. It is difficult to position each of them, and it is also difficult to re-install with the layout of the seismic isolation floor once installed.

  The present invention has been made in view of the above-mentioned points, and an object thereof is to provide a seismic isolation floor having a free access panel that can be easily arranged as a floor of the seismic isolation floor, and the seismic isolation It is to provide a floor installation method.

  The base isolation floor of the present invention includes a base body made of precast concrete, a base having a concave spherical lower sliding surface provided on the base body, a panel body made of precast concrete, and the panel body. And a free access panel disposed above the base and a convex spherical slide that is slidably in contact with the lower sliding surface of the base. It has a convex spherical sliding upper surface slidably in contact with the moving lower surface and the upper sliding surface of the free access panel, and an interposition member interposed between the base and the free access panel.

  According to such a seismic isolation floor, since the base body and the panel body are made of precast concrete, the base body and the panel body can be manufactured at the factory, and the lower sliding surface and the concave surface of the concave spherical shape are manufactured. Since the spherical upper sliding surface can be formed simultaneously with the manufacture of the base body and the panel body, the manufacturing cost can be reduced.

  In the base isolation floor of the present invention, the lower sliding surface and the upper sliding surface may have the same radius of curvature, and the sliding lower surface of the interposition member is the lower sliding surface of the base. The sliding upper surface of the interposition member may have the same curvature radius as that of the upper sliding surface of the free access panel. The sliding surface and the upper sliding surface may be formed as a part of a concave spherical surface, and the sliding lower surface and the sliding upper surface may be formed as a part of a convex spherical surface.

  In the present invention, the base includes at least one lower plate-like member made of a thin metal plate and embedded in the base main body on the upper surface of the base main body and fixed to the base main body on one surface. In this case, the lower sliding surface may be the other surface of the lower plate-like member, and the free access panel is embedded in the panel body on the lower surface of the panel body, and the panel body. May be provided with at least one upper plate-like member made of a thin metal plate and fixed on one surface, and in this case, the upper sliding surface is made of the other surface of the upper plate-like member. It may be.

  The base body may have a rectangular shape including a rectangle and a square. In this case, the base body is arranged at each of at least four corners of the upper surface of the base body and is made of four thin metal plates. Each of the lower plate-like members is embedded in the base body on the upper surface of the base body and fixed to the base body on one side, and the lower sliding surface is in the shape of a lower dish. Each of the members may consist of the other side of the member, and the panel body may have a rectangular shape including a rectangle and a square. In this case as well as the base, the free access panel is a panel. Four upper plate-like members made of a thin metal plate are disposed in each of at least four corners of the lower surface of the main body, and each upper plate-like member is embedded in the panel main body on the lower surface of the panel main body. The upper sliding surface is fixed on one surface It may be made from each of the other side.

  Further, the seismic isolation floor of the present invention may have a plurality of bases for one free access panel. In this case, the interposition member is provided between each base and the free access panel. The plurality of bases may be interposed, and the weight of each base itself can be reduced, and a space is provided between a base floor such as a floor on which the base is installed and the free access panel. Since it is formed, wiring or the like can be passed through the space.

  For the lower plate-shaped member having the lower sliding surface and the upper plate-shaped member having the upper sliding surface, those obtained by press forming a metal thin plate, preferably a stainless steel plate which is a weather-resistant steel plate, are preferable. .

  The interposition member is made of a flat sliding base formed of a metal material such as steel having a circular shape in plan view, and a synthetic resin partially embedded in and fixed to a circular concave portion on the lower surface of the sliding base. A lower sliding body, and an upper sliding body made of a synthetic resin that is partially embedded and fixed in a circular recess on the upper surface of the sliding base. The lower exposed surface (lower surface) and the upper exposed surface (upper surface) of each of the moving body and the upper sliding body are part of a spherical surface having the same radius of curvature as that of the lower sliding surface and the upper sliding surface facing each other. And may be slidably in contact with the lower sliding surface and the upper sliding surface facing each other.

  Each of the lower sliding body and the upper sliding body may be composed of a disc-shaped plate body mainly composed of polytetrafluoroethylene resin and optionally mixed with a reinforcing fiber such as glass fiber or a reinforcing material such as glass powder. Good.

  In the base-isolated floor of the present invention, the base is embedded and fixed in the rectangular base main body and passes through the lower part of the central portion of the lower sliding surface and the outer surface on the short side of the outer peripheral surface of the base main body. And at least two metal rods for temporary fixing extending at a predetermined interval in a direction from one outer surface on the short side to the other outer surface, and an end of the rod member, respectively. The free access panel may include a nut that is screwed and has an end surface exposed at the outer surface on the long side of the base body and embedded and fixed to the base body. A direction that is embedded and fixed in the main body, passes through the upper part of the center portion of the upper sliding surface, is parallel to the outer surface on the short side of the outer peripheral surface of the panel main body, and extends from one outer surface on the short side to the other outer surface Less stretched at a predetermined interval in And two metal rods for temporary fixing, parallel to the rod body for temporary fixing and embedded and fixed in the panel body, and parallel to the outer surface on the short side of the outer peripheral surface of the panel body and At least two metal connecting rods extending at a predetermined interval in the direction from one outer peripheral surface on the short side to the other outer peripheral surface, and ends of the temporary fixing and connecting rods And a nut that is exposed and fixed on the outer surface of the long side of the panel main body and is embedded and fixed to the panel main body.

  At least two metal temporary fixing rods embedded in and fixed to the free access panel and at least two metal temporary fixing rods embedded and fixed to the base are a free access panel and It is good to arrange so as to face each other in the thickness direction of the base.

  In the seismic isolation floor according to the present invention, when a plurality of seismic isolation floors are arranged in the longitudinal direction, a metal connecting plate is assigned across the end portions of the free access panels of adjacent seismic isolation floors. At least two formed through holes are matched with end faces of nuts fixed to connecting rods embedded and fixed in the panel body, and bolts are screwed and fixed to the nuts to connect the free access panels to each other. You may make it connect by.

  In the seismic isolation floor of the present invention, the base is in the form of a lower dish made of a thin metal plate having a (1) step of assembling a square-shaped formwork and (2) a concave spherical lower sliding surface in a factory. (3) a step of arranging a plurality of reinforcing bars orthogonal to each other in the mold; 4) Metal temporary fixing in which nuts are screwed and fixed to both ends at predetermined intervals along the width direction of the mold and through the center of the bottom surface of the convex spherical surface of the lower plate-shaped member. A step of disposing at least two rod-shaped bodies for use, (5) a step of placing concrete in a mold, and (6) after placing the concrete and curing the concrete sufficiently The base that is manufactured in this way may be manufactured through the process of removing the formwork. A lower plate-shaped member made of a thin metal plate embedded and fixed in at least four corners of the upper surface and having a concave spherical lower sliding surface, and a lower portion of the central portion of the convex spherical surface of the lower plate-shaped member. In addition, a rod-like body for temporary fixing, which is embedded and fixed at a predetermined interval and is screwed and fixed to both ends, is provided.

  The free access panel in the seismic isolation floor according to the present invention comprises, in a factory, (1) a process for assembling a rectangular mold, and (2) an upper plate shape made of a thin metal plate having a concave spherical lower sliding surface. (3) a step of arranging a plurality of reinforcing bars in the longitudinal direction and the width direction in the mold, and (3) a step of arranging the members with concave spherical openings facing downward at at least four corners of the mold; 4) A temporary fixing nut is screwed and fixed to both ends through the center of the convex spherical bottom surface of the upper plate-like member along the width direction of the mold frame and at a predetermined interval in the longitudinal direction of the mold frame. A step of arranging at least two temporary fixing rods made of metal, and (5) placing the temporary fixing rods side by side in the longitudinal direction at one end in the longitudinal direction of the mold and forming a mold At least a connecting nut is screwed and fixed to both ends with a predetermined interval in the longitudinal direction of the frame. A step of arranging two metal rods for connection, (6) a step of placing concrete in the mold, and (7) after the placement, curing the concrete to sufficiently harden the concrete. After that, the free access panel manufactured in this manner may be manufactured through a process of removing the formwork, and the manufactured free access panel has a concave spherical shape toward the lower side made of a thin metal plate embedded and fixed in at least four corners of the lower surface. An upper plate-shaped member having an upper sliding surface, and at least two metal temporary fixings that are embedded and fixed at predetermined intervals through the upper part of the central portion of the convex spherical bottom surface of the upper plate-shaped member And a temporary fixing rod-like body at one end in the longitudinal direction of the free access panel, and at least two metal connecting rod-like bodies embedded and fixed in parallel in the longitudinal direction. Yes.

  The base-isolated floor installation method of the present invention includes a base body made of precast concrete, a bottom sliding surface having a concave spherical shape, embedded in and fixed to the base body at least at the four corners of the top surface of the base body, and A lower plate-shaped member having a convex spherical surface, and at least two metallic first plates embedded and fixed in the base body through the upper part of the central portion of each convex spherical surface of the lower plate-shaped member A first nut for temporary fixing that is screwed and fixed to the end of the first rod-shaped body and is exposed to the side surface of the base body at the end face and embedded and fixed to the base body. A base body provided with, a panel body made of precast concrete, an upper plate-shaped member which is embedded and fixed in at least four corners of the lower surface of the panel body and has a concave spherical upper sliding surface and a convex spherical surface; The center of each convex spherical surface of this upper dish-shaped member At least two second metal rods for temporary fixing that are embedded and fixed in the panel body through the upper part of the panel, and are screwed and fixed to the end of the second bar body, and the panel body at the end surface The interposing member is exposed to the free access panel having the second nut exposed and fixed in the panel body, and the sliding lower surface of the interposing member is moved to the lower sliding surface of the lower plate-shaped member. A step of placing the moving upper surface in contact with the upper sliding surface of the upper plate-shaped member, a metal plate body having four through holes, and a third nut fixed to the plate body; A step of preparing a temporary fixing bracket provided with a first bolt screwed into the third nut, and a second through the four through holes of the plate body in the first and second nuts. Screwing together the bolts and temporarily fixing the base and the free access panel to each other by the plate of the temporary fixing bracket; Transporting the temporary fixed base and free access panel to the installation site and placing them on the foundation floor, and placing a metal floor on the foundation floor facing the tip of the first bolt And a step of bringing the tip of the first bolt into contact with the floor plate, a step of adjusting the height of the free access panel from the basic floor surface by screwing the first bolt toward the floor plate, and the free access After adjusting the height of the panel, placing a grout material in the gap between the base and the foundation floor, and removing the temporary fixing bracket from the base and the free access panel after the grout material is cured. Are provided.

  According to such a seismic isolation floor installation method, the work space can be reduced and the work time can be greatly shortened.

  According to the present invention, it is possible to produce in the factory, reduce the manufacturing cost, and since it is preliminarily integrated with the temporary fixing bracket, it is easy to carry to the installation site and easy to position and arrange. It is possible to provide a seismic isolation floor and a method for installing the seismic isolation floor.

FIG. 1 is a partially broken plan view of a preferred example of the seismic isolation floor of the present invention. FIG. 2 is an explanatory front view of the example shown in FIG. FIG. 3 is an explanatory rear view of the example shown in FIG. 4 is a cross-sectional explanatory view taken along the line IV-IV in the example shown in FIG. FIG. 5 is a cross-sectional explanatory view taken along the line VV in the example shown in FIG. 1. 6 is an enlarged front left side explanatory view of the example shown in FIG. FIG. 7 is a front right side enlarged explanatory view of the example shown in FIG. FIG. 8 is an explanatory plan view of the base shown in FIG. FIG. 9 is an explanatory plan view of the free access panel of the example shown in FIG. FIG. 10 is a partially enlarged front cross-sectional explanatory view of the example shown in FIG. FIG. 11 is an explanatory plan view in which the example shown in FIG. FIGS. 12A and 12B are explanatory views of the temporarily fixed state of the example shown in FIG. 1, where FIG. 12A is a front explanatory view and FIG. 12B is a side explanatory view. FIG. 13 is an explanatory diagram of a temporary fixing construction process in the example shown in FIG. 1. FIG. 14 is an explanatory diagram after construction of temporary fixing in the example shown in FIG. FIG. 15 is an operation explanatory diagram of the example shown in FIG. FIG. 16 is an explanatory plan view of another preferred example of the seismic isolation floor of the present invention. FIG. 17 is a partially enlarged front explanatory view of the example shown in FIG. FIG. 18 is an explanatory front view of still another preferred example of the seismic isolation floor of the present invention. FIG. 19 is an explanatory plan view of still another preferred example of the seismic isolation floor of the present invention.

  Next, embodiments of the present invention will be described in more detail based on preferred examples shown in the drawings. The present invention is not limited to these examples.

  1 to 10, a base-isolated floor 1 of this example has a base body 2 made of precast concrete and a base having a concave spherical lower sliding surface 4 provided on an upper surface 3 of the base body 2. A free access panel having a base 5, a precast concrete panel main body 6, and a concave spherical upper sliding surface 8 provided on the lower surface 7 of the panel main body 6 and disposed above the base 5 ( A floor member) 9, a convex spherical sliding lower surface 10 slidably in contact with the lower sliding surface 4 of the base 5, and a convex spherical shape slidably in contact with the upper sliding surface 8 of the free access panel 9. And an interposition member 12 interposed between the base 5 and the free access panel 9.

  The base body 2 having a rectangular shape in plan view has the upper surface 3, the lower surface 21, and the outer peripheral surface 22 that become the flat upper surface 3, the lower surface 21, and the outer peripheral surface 22 of the base main body 2, and is provided at the four corners of the upper surface 3. The rectangular concrete rectangular body 24 having a recess 23 and a rectangular parallelepiped concrete body 24, and the outer peripheral surfaces 22 are extended in parallel with the outer surfaces 25 and 26 on the long side and the outer surfaces 27 and 28 on the short side. A plurality of reinforcing bars 29a and 29b arranged in a lattice in the concrete body 24 (hereinafter, the direction in which the reinforcing bar 29a extends is referred to as direction X, and the direction in which the reinforcing bar 29b extends is referred to as direction Y). These are made of precast concrete (hereinafter abbreviated as “PC”) in which the concrete body 24 is reinforced by the reinforcing bars 29a and 29b.

  In addition to the base body 2, the base 5 is embedded in the concrete body 24 in the recesses 23 at the four corners of the upper surface 3 and is fixed to the concrete body 24 on one surface 31 and is made of four metal thin plates. The lower plate-like member 32 is embedded and fixed in the concrete body 24 and passes below the central portion of the lower sliding surface 4 and is parallel to the outer surfaces 27 and 28 in the direction Y and from the outer surface 27 to the outer surface 28. Two pairs of metal rods 33 and 34 and 35 and 36 for temporary fixing extending at a predetermined interval in the direction X toward the pair, a pair of rods 33 and 34 on the outer surface 27 side, and a pair of the outer surface 28 side. Nuts 41 which are screwed into the respective end portions 37 in the direction Y of the rod-like bodies 35 and 36 and whose end faces 39 and 40 are exposed at the outer faces 25 and 26 and are embedded and fixed in the concrete body 24. It is and a beauty 42.

  The lower plate-like member 32 disposed in each of the recesses 23 has a downwardly convex convex spherical surface 31 having a desired radius of curvature, and is complementary to the surface 31 and has the same curvature as the surface 31. The lower sliding surface 4 is composed of the other surface 45 of the lower plate-like member 32. The other surface 45 has a concave spherical surface having a radius.

  Similar to the base body 2, the panel body 6 having a rectangular shape in plan view has the lower surface 7, the upper surface 51 and the outer peripheral surface 52 which become the flat lower surface 7, the upper surface 51 and the outer peripheral surface 52 of the panel main body 6. A rectangular rectangular parallelepiped-shaped concrete body 54 having recesses 53 provided at the four corners of the outer peripheral surface 52 and outer surfaces 55 and 56 on the long side and outer surfaces 57 and 58 on the short side of the outer peripheral surface 52. Each of the reinforcing bars 59a and 59b has a plurality of reinforcing bars 59a and 59b extending in parallel and arranged in a lattice shape in the concrete body 54. The concrete body 54 is reinforced by the reinforcing bars 59a and 59b and is made of PC. .

  In addition to the panel body 6, the free access panel 9 is embedded in the concrete body 54 in the recesses 53 at the four corners of the lower surface 7, fixed to the concrete body 54 on one surface 61, and made of four thin metal plates. The upper plate-like member 62 is embedded and fixed in the concrete body 54 and passes above the center portion of the upper sliding surface 8 and is parallel to the outer surfaces 57 and 58 in the direction Y and from the outer surface 57 to the outer surface 58. Two pairs of metal rods 63 and 64 and 65 and 66 for temporary fixing extending at a predetermined interval in the direction X toward and a concrete body 54 juxtaposed in the direction X with the rods 63 and 64 and 65 and 66. In the direction Y and from the outer surface 57 toward the outer surface 58 in a predetermined direction X. Two pairs of metal connecting rods 67 and 68 and 69 and 70 extending with a gap, and rods 63 and 64 on the outer surface 57 side and rods 65 and 66 on the outer surface 58 side and for connection for temporary fixing Are screwed and fixed to both end portions 71 and 72 of the rod-like bodies 67 and 68 on the outer surface 57 side and rod-like bodies 69 and 70 on the outer surface 58 side, and the end surfaces 73 and 74 and 75 and 76 are outer surfaces 55 and 56. And nuts 77 and 78 and 79 and 80 which are exposed and fixed in the concrete body 54.

  The upper plate-like member 62 disposed in each of the recesses 53 has one surface 61 having a desired radius of curvature and a convex convex spherical surface, and is complementary to the surface 61 and has the same curvature as the surface 61. The upper sliding surface 8 includes the other surface 85 of the upper plate-like member 62.

  The concave spherical lower sliding surface 4 and the concave spherical upper sliding surface 8 have the same radius of curvature.

  The interposition member 12 that exhibits a function as a sliding member includes a flat sliding base 91 formed of a metal material such as steel having a circular shape in plan view, and a circular recess 92 on the lower surface of the sliding base 91. A synthetic resin-made sliding body 93 that is partially embedded and fixed to the sliding base 91 and has a downwardly convex convex spherical sliding lower surface 10 on the lower surface, and a circle on the upper surface of the sliding base 91 A synthetic resin sliding body 95 having a convex convex spherical sliding upper surface 11 on the upper surface is partially embedded in the shape concave portion 94 and fixed to the sliding base 91. .

  The sliding lower surface 10 and the sliding upper surface 11 of the sliding bodies 93 and 95 to be the sliding surfaces have the same radius of curvature as the concave spherical lower sliding surface 4 and upper sliding surface 8 facing each other. And is slidably in contact with the concave and lower spherical sliding surfaces 4 and 8 facing each other.

  Hereinafter, the manufacturing method of said seismic isolation floor 1 is demonstrated.

  The base 5 is, for example, a process of assembling a rectangular mold having a pair of long side frames and a pair of short side frames and a bottom frame in a factory, one convex surface 31 and A step of disposing the lower plate-like member 32 made of a thin metal plate having the other surface 45 which becomes the concave sliding surface 4 on the lower spherical surface, with the other surface 45 facing downward at the four corners of the bottom frame of the mold. And a step of arranging a plurality of reinforcing bars 29a and 29b in parallel to the long side frame and the short side frame of the mold, and above the center of the surface 31 of the lower plate-like member 32. A metal rod 33 for temporary fixing, in which nuts 41 and 42 are screwed and fixed to the end portion 37 in parallel with the frame on the short side of the frame and in a direction in which the frame on the long side of the mold extends. And 34 and 35 and 36, one pair of rod-like bodies 33 and 34 is placed on one frame side on the short side and the other pair of rods. After placing the bodies 35 and 36 on the other frame side of the short side, placing the concrete in the mold, and curing the concrete after placing, sufficiently curing the concrete, It is manufactured through a process of removing the formwork.

  The free access panel 9 is a step of assembling a rectangular form having a pair of long side frames, a pair of short side frames, and a bottom frame, for example, in a factory, as in the manufacturing method of the base 5. And an upper plate-like member 62 made of a thin metal plate having one surface 61 having a convex spherical shape and the other surface 85 serving as a concave spherical upper sliding surface 8, and the other at the four corners of the bottom frame of the mold. A step of disposing the surface 85 downward, a step of arranging a plurality of reinforcing bars 59a and 59b in parallel to the long side frame and the short side frame of the mold, and the surface of the upper plate-like member 62 The nuts 77 and 78 are screwed and fixed to the end portion 71 in a direction extending in the direction extending to the frame on the long side of the mold and parallel to the frame on the short side of the mold through the upper part of the center 61. A pair of rod-like bodies 63 and 64 and 65 and 66 for temporary fixing made of metal, one pair of rod-like bodies 63 and 4 is disposed on one frame side on the short side, and the other pair of rod-shaped bodies 65 and 66 are disposed on the other frame side on the short side, respectively, and the pair of rod-shaped bodies 63 and 64 and 65 and 66, respectively. And two pairs of metals in which nuts 79 and 80 are screwed and fixed to the end portion 72 with a predetermined interval parallel to the frame on the short side of the mold and extending in the direction of the frame on the long side of the mold In the connecting rod-like bodies 67 and 68 and 69 and 70, one pair of rod-like bodies 67 and 68 are placed on one frame side on the short side, and the other pair of rod-like bodies 69 and 70 are placed on the other side on the short side. It is manufactured through a step of placing on the frame side, a step of placing concrete in the mold, and a step of removing the mold after curing and curing the concrete sufficiently after placing.

  The base 5 and the free access panel 9 manufactured in the factory in this way, the interposition member 12, the sliding lower surface 10 as the lower sliding surface 4 of the lower dish-shaped member 32, and the sliding upper surface 11 thereof. Can be manufactured by bringing the base 5, the free access panel 9, and the interposition member 12 into assembly by bringing the base 5, the free access panel 9, and the interposition member 12 into contact with the upper sliding surface 8 of the upper plate-like member 62.

  Next, an example of the installation method of the seismic isolation floor 1 manufactured in this way at the installation site will be described with reference to FIGS.

  In the installation, each of the four temporary fixing metal fittings 100 prepared for temporarily fixing the base 5 and the free access panel 9 to form a unit includes a metal plate body 101 having a rectangular shape in plan view, and a plate body A through hole 102 formed in the upper part of the longitudinal direction of 101, a nut 104 fixed to one plate surface 103 of the plate body 101 and having an internal thread portion on the inner surface, an external thread portion 105 on the outer surface and a nut 104 A bolt 106 that is screwed to the female screw portion 105 at the male screw portion 105, a pair of through holes 107 that are formed in the plate body 101 at a predetermined interval in the width direction of the plate body 101, and a position above the through hole 107. And a pair of through holes 108 formed at a predetermined interval in the width direction of the plate body 101 and bolts 109 and 110 inserted through the through holes 107 and 108, respectively.

  In the four temporary fixing brackets 100, the other plate surface 111 of the plate body 101 is brought into contact with the outer surfaces 25 and 55 and 26 and 56 of the base body 2 and the panel body 6, respectively. Are matched with the end surfaces 39 and 40 of the nuts 41 and 42 exposed at the outer surfaces 25 and 26 of the base body 2, respectively, and the other pair of through holes 108 are exposed at the outer surfaces 55 and 56 of the panel body 6. The bolts 109 and 110 inserted through the through-holes 107 and 108 are screwed into the nuts 41 and 42 and 77 and 78, respectively, to the concrete body 24 and the concrete body 54. By fastening, the base 5 and the free access panel 9 sandwiching the interposition member 12 are temporarily connected and fixed to each other to form a unit. .

  The unitized base 5, the free access panel 9 and the interposition member 12 are lifted through a string-like body 115 such as a wire rope fixed to the through hole 102 of the plate body 101 of the temporary fixing bracket 100, and the installation site It is conveyed to.

  The base-isolated floor 1 in the temporarily fixed state conveyed to the installation site is placed on the foundation floor 121 such as a floor, and the base-isolated floor 1 is placed on the foundation floor 121, as necessary. The front end surface 122 of the bolt 106 screwed into the nut 104 fixed to one plate surface 103 of the plate body 101 of the temporary fixing metal fitting 100 is brought into contact with a metal floor plate 123 placed on the foundation floor surface 121, In this state, the bolt 106 is rotated and the nut 104 is screwed to raise the base 5 and the free access panel 9 connected and fixed by the plate body 101 to adjust the height of the seismic isolation floor 1 and adjust the height. After that, a mold is assembled (not shown) in the gap between the lower surface 21 of the concrete body 24 of the base 5 and the foundation floor 121, and a grout material 124 is placed in the mold. Temporary fixing bracket 100 after the grouting material 124 is cured Removed from MenShinyuka 1, thereby installation in the foundation floor 121 of MenShinyuka 1 is completed. When the height adjustment is unnecessary, it is not necessary to place the grout material 124.

  As described above, the base-isolated floor 1 installed on the foundation floor 121 is normally configured such that the interposition member 12 is positioned substantially at the center of the lower sliding surface 4 and the upper sliding surface 8 so that the panel body 6 A vertical load of a structure (not shown) such as a machine tool installed on the upper surface 51 is received and the structure is supported on the foundation floor 121. When a large horizontal force is applied to the foundation floor 121 and the base 5 due to seismic motion or the like, the sliding lower surface 10 and the sliding upper surface of the interposed member 12 with respect to the lower sliding surface 4 and the upper sliding surface 8. As shown in FIG. 15, the free access panel 9 and the structure are relatively vibrated in the horizontal direction H with respect to the foundation floor 121 and the base 5 while the interposition member 12 is swung. The In such vibration, the interposed member 12 tries to return to the position as shown in FIG. 2, and the vibration of the free access panel 9 and the structure based on the movement in the horizontal direction H of the foundation floor 121 and the base 5. The energy is absorbed and attenuated by friction between the lower sliding surface 4 and the upper sliding surface 8 and the sliding lower surface 10 and the sliding upper surface 11. Therefore, even if a large horizontal force such as an earthquake is applied to the foundation floor 121 and the base 5, it is possible to prevent a situation in which the structure is damaged.

  The seismic isolation floor 1 includes a base 5, a free access panel 9, and an interposition member 12 disposed between the lower sliding surface 4 and the upper sliding surface 8. As shown in FIG. 1, the plurality of such seismic isolation floors 1 are connected to the outer surface 28 of one base body 2 and the outer surface 27 of the other base body 2 which are adjacent to each other in the direction X, and one panel body. 6 and the outer surface 57 of the other panel body 6 are in contact with each other and juxtaposed in the direction X, and the metal connecting plate 131 passes through the through hole of the connecting plate 131 and is attached to the nuts 80 and 79. With the bolt 132 screwed together, the one panel body 6 and the other panel body 6 straddle one end in the direction X of one panel body 6 and the other end in the direction X of the other panel body 6 on the outer surfaces 55 and 56. It is fixed to the other panel body 6 and the connecting plate 131 Ri may be connected a plurality of MenShinyuka 1 juxtaposed in the direction X.

  Further, as shown in FIG. 18, the seismic isolation floor 1 includes two lower sliding surfaces 4 facing the upper sliding surface 8 in the direction Y and two equivalents to the base 5 respectively. The bases 141 and 142, one free access panel 9, the bases 141 and 142, and the interposition member 12 interposed between the one free access panel 9, and two bases One free access panel 9 may be supported by the intervening member 12 at 141 and 142.

  According to the seismic isolation floor 1 having the bases 141 and 142 juxtaposed with each other in the direction X, the weight can be reduced and wiring can be passed between the bases 141 and 142. At the time of installation of the seismic floor 1, not only the grout material 124 can be easily placed in the gap between the bases 141 and 142 and the foundation floor surface 121, but also the installation work can be simplified. .

  Further, as shown in FIG. 19, the seismic isolation floor 1 includes four lower plate-like members 32 provided with the lower sliding surface 4, four upper plate-like members 62 provided with the upper sliding surface 8, and In addition to the four interposition members 12, in the center portion between the lower plate member 32 and the upper plate member 62 in the direction X, the same as the lower plate member 32, the upper plate member 62, and the interposition member 12. The two lower plate-shaped members 151, the upper plate member 152, and the interposition member 153 may be provided.

DESCRIPTION OF SYMBOLS 1 Base-isolation floor 2 Base body 3 Upper surface 4 Lower sliding surface 5 Base 6 Panel main body 7 Lower surface 8 Upper sliding surface 9 Free access panel 10 Sliding lower surface 11 Sliding upper surface 12 Interposition member

Claims (8)

A base body made of precast concrete, a base having a concave spherical lower sliding surface provided on the base body, a panel body made of precast concrete, and a concave spherical surface provided on the panel body. A free access panel having an upper sliding surface and disposed above the base, a convex spherical sliding lower surface slidably contacting the lower sliding surface of the base, and an upper side of the free access panel It has a convex spherical sliding upper surface that is slidably in contact with the sliding surface, and an interposition member interposed between the base and the free access panel, and the base is embedded in the base body a first rod-like body is fixed, and comprises a first nut which is embedded and fixed to the base body with screwed to each of both ends of the first rod-shaped body, free Access panel is fixed in the panel body And a second nut that is screwed into both ends of the second rod-like body and is fixedly embedded in the panel body. The bolt is screwed into the first nut from the outer surface of the base body, and is screwed into the second nut from the outer surface of the panel body, and is fastened to the base body and the panel body. The seismic isolation floor which made it possible to connect and fix the base and the free access panel sandwiching the interposition member through temporary fixing brackets . The seismic isolation floor according to claim 1, wherein the lower sliding surface and the upper sliding surface have the same radius of curvature. The sliding lower surface of the interposed member has the same radius of curvature as the curvature radius of the lower sliding surface of the base, and the sliding upper surface of the interposed member is equal to the curvature radius of the upper sliding surface of the free access panel. The seismic isolation floor according to claim 1 or 2, having the same radius of curvature. The base is embedded in the base body on the upper surface of the base body and is fixed to the base body on one side and includes at least one lower plate-shaped member made of a thin metal plate. The seismic isolation floor according to any one of claims 1 to 3, wherein the sliding surface is composed of the other surface of the lower plate-like member. The base body has a rectangular shape, and the base is disposed at each of at least four corners of the upper surface of the base body and includes four lower plate-like members made of metal thin plates. The member is embedded in the base body on the upper surface of the base body and is fixed to the base body on one surface, and the lower sliding surface is composed of the other surface of the lower plate-shaped member. The seismic isolation floor according to any one of claims 1 to 3. The free access panel includes at least one upper plate-like member made of a thin metal plate and embedded in the panel body on the lower surface of the panel body and fixed to the panel body on one side. The seismic isolation floor according to any one of claims 1 to 5, comprising the other surface of the upper plate-like member. The panel body has a square shape, and the free access panel is arranged at each of at least four corners of the lower surface of the panel body and includes four upper plate-shaped members made of metal thin plates. 6. The member is embedded in the panel main body on the lower surface of the panel main body and fixed to the panel main body on one surface, and the upper sliding surface is composed of the other surface of each of the upper plate-shaped members. The seismic isolation floor according to any one of the above. The seismic isolation floor according to any one of claims 1 to 7, further comprising a plurality of bases, wherein the interposition member is interposed between each base and the free access panel.

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