JP2017145674A - Base-isolated free-access floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base-isolated free-access floor, particularly, a base-isolated free-access floor that improves aseismic performance coping with short-period and long-period seismic ground motions, by making free-access floor itself have a base-isolated structure.SOLUTION: Basically, a base-isolated free-access floor has a basic structure in which a plurality of supports are erected in a constantly arranged manner on a concrete floor slab of a building, in which a sphere holding part is provided at the tip of the support, and in which a steel plate superposed on an undersurface of a floor panel via a sphere rotatably held by the plurality of sphere holding parts is supported.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a seismic isolation free access floor, and more particularly to a seismic isolation free access floor having a seismic isolation structure as a seismic isolation structure and improved seismic performance corresponding to short-period ground motion and long-period ground motion.

  Basically, a plurality of columns are erected in a fixed arrangement on a concrete floor slab of a building, and have a sphere holder at the tip of the column, and are rotatably held by the plurality of sphere holders. The basic structure is to support the steel plates laminated on the lower surface of the floor panel via a spherical body.

  The steel plates laminated on the lower surface of the floor panel are designed to reinforce joints and prevent bending of adjacent floor panels.

  Conventionally, various types of various structures have been proposed and publicly known for free access floors such as offices where high-precision production facilities, computers, office automation equipment, and the like are installed.

  JP 2008-255587 A   JP 2006-348748 A

  In Japanese Patent Application Laid-Open No. 2008-255587, a free access constructed by standing a plurality of support legs on a floor slab of a building in a fixed arrangement and supporting a floor panel on a panel receiving portion at the upper end of the support legs. A structure in which a floor and a structural frame of a building are connected so as to be able to transmit a horizontal force has been proposed.

  In JP 2006-348748 A described above, in the seismic isolation floor in which a plurality of ball bearings are fixed to the frame to displace the frame on the floor slab, the frame faces the opening downward. In addition, a ball bearing is fixed to the inner surface of the upper plate portion of the C-shaped steel, and a mounting height adjusting mechanism for the ball bearing is provided.

  On the other hand, the seismic isolation free access floor of the present invention is configured as follows.

  A plurality of pillars are erected in a fixed arrangement on a concrete floor slab of a building, and have a sphere holder at the tip of the pillar, and the spheres are rotatably held by the plurality of sphere holders. The steel plate laminated on the floor panel is supported, and the steel plate laminated on the lower surface of the floor panel has the effect of reinforcing the joint of the adjacent floor panel and preventing the floor panel from being bent. Among the plurality of support columns arranged on the concrete floor slab, a part of the plurality of support columns is a ball plunger in which a sphere is urged upward. The steel plate is formed with concave portions facing downward in a certain arrangement, and a spherical body biased upward is fitted into the concave portion, and an earthquake Short of time When the floor panel slides on the sphere with the initial swing, the sphere is removed from the concave portion of the steel plate, and the entire weight of the floor panel is added to the sphere other than the plunger. When weight is added to the column, the sphere rotates even if the floor panel slides in all directions in the event of an earthquake, so the slide resistance is small and a sufficient seismic isolation effect can be obtained. A plurality of pillars standing on a concrete floor slab of a building in a fixed arrangement, having a sphere holder at the tip of the pillar, and a sphere rotatably held in the plurality of sphere holders. Supporting a downward concave steel plate laminated to the adjacent joint reinforcement of the floor panel through, and configured to be able to restore the amount of movement of the sphere, and a support column erected on the concrete floor slab The base is fixed to the base plate, the tip is fixed to the sphere holding part via the support plate, and the sphere held rotatably by the sphere holding part is depressed downward while being braked by the friction material in the sphere holding part. The steel plate is supported, and the movement of the sphere pauses at the end of the downwardly concave steel plate, and then moves in the restoring direction. The column has a long nut and a lock nut for height adjustment during installation. It is a seismic isolation free access floor characterized by being.

  In the embodiment shown in FIG. 9, the downward concave steel plate 200 laminated on the floor panel 1 has the effect of reinforcing the adjacent joint of the floor panel 1 and preventing deflection.

  Further, in the embodiment shown in FIG. 9 to FIG. 10, a plurality of support columns 10 are erected in a fixed arrangement on the concrete floor slab 7 of the building, and have a spherical body holding portion 91 at the tip of the support column 10. Supporting the downward concave thin steel plate 200 laminated on the floor panel 1 via the sphere 8 rotatably held by the plurality of sphere holding portions 91, the movement amount of the sphere 8 is configured to be reconstructable. A base portion of a column 10 erected on the concrete floor slab 7 is fixed to the base plate 2, and a sphere holding portion 91 is fixed to the tip portion via a support plate 9, and the sphere holding portion 91 is rotatably held by the sphere holding portion 91. The formed sphere 8 supports the downward concave steel plate 200 while being braked by the friction material 92 in the sphere holding portion, and after the movement of the spheres 8 and 81 is stopped at the end of the downward concave steel plate 200, the restoring direction is caused by reaction. Features moving to And, provides a seismic isolation raised floor to the nut 62 and lock nut 63 for height adjustment during installation is provided in the post 10.

  The steel plate 6 laminated on the back surface of the floor panel 1 is formed with a downward recess 61, and the sphere 40 held at the tip of the ball plunger 12 is formed in the recess 61 as shown in FIGS. 2 to 5. It is inserted.

  Since the amount of displacement is small in small earthquake motions, the above-mentioned fitting state is maintained. However, when shifting to large earthquake motions, as shown in FIGS. 3 to 6, the recesses 61 and the spheres 40 and 41 are fitted. The ball plunger 12 is released and the entire weight of the floor panel 1 is urged by the spheres 4, 40, 41.

  The floor panel 1 held by the rotatable spheres 4 and 41 can slide in all directions, and the seismic isolation effect is exhibited.

It is the top view which showed notionally the support | pillar structure of the seismic isolation free access floor which concerns on this invention. It is the fragmentary sectional view which showed notionally the support | pillar structure of the seismic isolation free access floor which concerns on this invention. It is the fragmentary sectional view which showed notionally the support | pillar structure of the seismic isolation free access floor which concerns on this invention. It is the top view which showed notionally the support | pillar structure of the seismic isolation free access floor which concerns on this invention. It is the fragmentary sectional view which showed notionally the support | pillar structure of the seismic isolation free access floor which concerns on this invention. It is the fragmentary sectional view which showed notionally the support | pillar structure of the seismic isolation free access floor which concerns on this invention. It is sectional drawing which shows the state currently fitted by the steel plate recessed part of the steel plate laminated | stacked on the floor panel lower surface by the upper part of the spherical body of a ball plunger. It is sectional drawing which shows the state which the upper part of the spherical body of the ball plunger left | separated from the steel plate recessed part of the steel plate laminated | stacked on the floor panel lower surface, and the steel plate contact | abutted to the partial plane part of the spherical body. It is a fragmentary perspective view of the seismic isolation free access floor which concerns on this invention. It is a fragmentary sectional view showing the 2nd example of the seismic isolation free access floor concerning the present invention.

  As shown in FIG. 2, a plurality of pillars 10 are erected in a fixed arrangement on a concrete floor slab 7 of a building, and have a sphere holder 3 at the tip of the pillar 10. The steel plate 6 laminated | stacked on the floor panel 1 is supported through the spherical bodies 4 and 41 hold | maintained rotatably.

  In a small earthquake motion, as shown in FIG. 2, the sphere 41 is held in the steel plate recess 61 laminated on the floor panel 1, and when it changes to a large earthquake motion, as shown in FIG. The above-mentioned fitting state is released, the leaf spring 5 is pressed downward, and the total load of the floor panel on which the steel plates are laminated is added to the spheres 4, 41 other than the ball plunger, so that the rotatable spheres 4, 41 The floor panel 1 held in the slidable manner in all directions is effective in seismic isolation.

  Even if the floor panel 1 slides in all directions, since the spheres 4 and 41 rotate, the sliding resistance is small and a sufficient seismic isolation effect can be obtained.

  Moreover, as shown in FIG. 10, the downward concave steel plate 200 laminated | stacked on the lower surface of the floor panel 1 can acquire the joint reinforcement of the mutually adjacent floor panel 1, and the effect of prevention of the bending of the floor panel 1. FIG.

  Of the plurality of columns arranged on the concrete floor slab of the building, the ball plunger is a plunger in which the spherical body holding portion 3 biased upward is formed.

  As shown in FIG. 2, a steel plate 6 is laminated on the lower surface of the floor panel 1, and a concave portion 61 facing downward is formed in the steel plate 6 in a certain arrangement, and the upper portion is formed in the concave portion. A spherical body 40 biased in the direction is fitted.

  When the floor panel 1 slides on the sphere 40 during an earthquake, the sphere 40 is detached from the recess 61 of the steel plate 6 and the entire weight of the floor panel 1 is added to the other spheres 4 and 41.

  When the total weight of the floor panel is added to the column, even if the floor panel 1 slides in all directions, the spheres 4 and 41 rotate even if the floor panel 1 slides in all directions, so that sliding resistance is small and a sufficient seismic isolation effect can be obtained. It is configured to be able to.

  As shown in FIG. 9 to FIG. 10, a plurality of support columns 10 are erected in a fixed arrangement on a concrete floor slab 7 of a building, and have a sphere holding portion 91 at the tip of the support column 10. The downward concave steel plate 200 laminated on the adjacent joint reinforcement of the floor panel 1 is supported via the spheres 8 and 81 rotatably held in the holding portion 91, and the movement amount of the spheres 8 and 81 can be restored. ing.

  Further, as shown in FIGS. 9 to 10, the base portion of the column 10 erected on the concrete floor slab 7 is welded to the base plate 2, and the sphere holding portion 91 is fixed to the tip portion via the support plate 9. The sphere 8 rotatably held by the sphere holding portion 91 supports the downward concave steel plate 200 while being braked by the friction material 92 in the sphere holding portion, and the sphere 81 is formed at the end of the downward concave steel plate 200. After reaching the end of the downward concave steel plate 200, it is configured so that it can be restored to its original position by reaction, and the spheres 8, 81 move in the recovery direction along the downward concave shape.

  Moreover, all the support | pillars 10 are equipped with the long nut and lock nut 63 for height adjustment at the time of installation.

  In addition, since the moving range of the spheres 8 and 81 is wider than that of other spheres, it can cope with long-period shaking of the earthquake, and the floor panel 1 can slide in all horizontal directions. The seismic isolation effect can be obtained.

1 Floor panel 10 Post (Height adjustment long nut combined post)
DESCRIPTION OF SYMBOLS 11 Spring 12 Ball plunger 2 Base plate 21 Welding part 3 Sphere holding part 4 Sphere 40 Sphere 41 Sphere 411 Partial plane part of sphere 5 Leaf spring 6 Steel plate 61 Steel plate recessed part 63 Lock nut 7 Concrete floor slab 8 Sphere 81 Sphere 9 Support plate 91 Sphere holder 92 Friction material 200 Downward concave steel plate 201 Fixing screw

Claims (10)

  A plurality of pillars are erected in a fixed arrangement on a concrete floor slab of a building, and have a sphere holder at the tip of the pillar, and the spheres are rotatably held by the plurality of sphere holders. Seismic-isolated free access floor characterized by supporting steel sheets laminated on the floor panel.   2. The seismic isolation free access floor according to claim 1, wherein the steel plates laminated on the lower surface of the floor panel have an effect of reinforcing joints between adjacent floor panels and preventing the floor panel from bending.   The seismic isolation free access floor according to claim 1, wherein the column arranged on the concrete floor slab of the building is a ball plunger whose sphere is biased upward.   Steel plates are laminated on the lower surface of the floor panel, and concave portions facing downward are formed in a certain arrangement on the steel plates, and spheres biased upward are fitted into the concave portions. The seismic isolation free access floor according to claim 1.   When the floor panel slides on the sphere due to a short period swing during an earthquake, the sphere is removed from the recess of the steel plate, and the entire weight of the floor panel is biased by the sphere other than the plunger. The seismic isolation free access floor according to claim 1.   The ball plunger sphere is rotated by the short-period oscillating ground motion, and the partial plane of the sphere is brought into contact with the steel plate laminated on the floor panel. The total weight of the steel plate and the floor panel is a plunger other than the center plunger. A seismically isolated free access floor that is configured to be energized by a sphere.   When the entire weight of the floor panel is added to the column, the sphere rotates even if the floor panel slides in all directions, so the sliding resistance is small and sufficient seismic isolation effect can be obtained. The seismic isolation free access floor according to claim 1, wherein the seismic isolation free access floor is provided.   A plurality of pillars are erected in a fixed arrangement on a concrete floor slab of a building, and have a sphere holder at the tip of the pillar, and the spheres are rotatably held by the plurality of sphere holders. A seismic-isolated free access floor that supports a downwardly concave steel sheet laminated on the adjacent joint reinforcement of the floor panel and is configured to restore the amount of movement of the sphere.   The base part of the column erected on the concrete floor slab is fixed to the base plate, and the sphere holding part is fixed to the tip part via the support plate, and the sphere held rotatably on the sphere holding part holds the sphere. 9. The seismic isolation system according to claim 8, wherein the steel plate supports the downward concave steel plate while being braked by the friction material in the portion, and moves in the restoring direction after the movement of the sphere stops at the end of the downward concave steel plate. Free access floor.   The seismic isolation free access floor according to claim 1, wherein the support is provided with a long nut and a lock nut for height adjustment at the time of installation.

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