JPH06346578A - Base isolation double floor - Google Patents

Abstract

PURPOSE:To facilitate construction work by fixing an elastic leg on a foundation floor surface to connect a panel support plate with an upper section of the elastic leg and fitting an engaging projection and an engaging recessed section to fix a floor panel. CONSTITUTION:A strut 2 is bonded and fixed on a foundation floor surface 1, the height of a panel plate 24 is adjusted to assemble it on the strut 2, and a floor panel 3 is fixed on the panel support plate 24 to construct a double floor. Next, when a body vibrates due to earthquake, a fixed base plate 20 fixed on the foundation floor surface 1 moves horizontally and integrally with the foundation floor surface 1. A movable plate 22 which supports a floor panel 3 which is a double floor moves relatively in the horizontal direction due to elastic deflection to absorb horizontal force of earthquake force. Also, with regard to vibration in the up and down directions, up and down movement which is transmitted to the movable plate 22 is absorbed by elastic expansion and contraction of an elastic plate 25 via a ball 33. Consequently, earthquake force can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base isolation double floor for reducing seismic force applied to a building.

[0002]

2. Description of the Related Art Conventionally, the most widely used technology for building earthquake countermeasures is a seismic structure that resists seismic forces due to the structure of the building. There is a structural type. This seismic structure prevents collapse of the building due to seismic force, and humans and objects in the building are directly affected by the earthquake, so they cannot avoid the primary or secondary damage of the earthquake. .

Therefore, the floor of a building having an earthquake-resistant structure has an independent double-floor structure which is separate from the building frame, and the independent double-floor is arranged on the foundation of the floor through a displacement mechanism such as rubber. , A seismic isolation double floor that is designed to escape or absorb and reduce the seismic force applied to the building has been proposed and put into practical use.

The seismic isolation double floor prevents the collapse of the building from being transmitted to the floor on which humans and articles are placed, while preventing the collapse due to the earthquake by making the building itself a seismic resistant structure and preventing the humans and articles in the building from being affected by the earthquake. Since it is possible to avoid the primary or secondary damage, and only the floor in the building of the earthquake-resistant structure can be made a floor separate from the building frame, and a structure corresponding to the seismic force can be provided. , It has the advantage that only the floor of the existing building can be renovated and constructed.

However, in the conventional seismic isolation double floor that has been generally constructed, a pillar provided with a displacement mechanism such as rubber is placed on the floor foundation of the building frame, and the joists are supported by this pillar.
Since the floor panel is fixed on the joists to form the floor, the distance between the floor foundation surface of the building frame and the double floor surface becomes large, and when installed in an existing building, the floor surface to the ceiling There was a problem that the height was too small.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to directly support a floor panel on a column provided with a displacement mechanism so that the space between the floor foundation surface and the double floor surface can be as small as possible.
The goal is to make it small enough to make the height from the floor to the ceiling large enough.

Further, the structure of the elastic leg members for supporting the floor panel is simplified to reduce the manufacturing cost and to facilitate the construction work of the base isolation double floor.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the means adopted by the present invention is such that, when a building body vibrates due to an earthquake, the vibrations in the horizontal direction are displaced horizontally from each other, and seismic energy is increased. The movable plate and the fixed base plate that supports the movable plate and is installed on the foundation floor surface of the building body so that the horizontal seismic force is reduced between the movable plate and the fixed base plate. A support panel having a panel support plate for supporting the floor panel at the center of the upper part of the movable plate with an elastic body interposed therebetween, and a column having an adjusting member for vertically moving the panel support plate, and a floor panel of a predetermined size. In addition, the panel support plate is connected to the floor panel by connecting screws while being fitted to each other, and the floor panel is placed and connected on the panel support plate.

[0009]

The elastic legs are fixed on the foundation floor, and the panel support plate is connected to the upper portions of the elastic legs while adjusting the height. The floor panel is placed on the panel support plate while fitting the engaging projections and the engaging recesses, and is connected by the connecting screws to construct a double floor. When seismic force is applied, the elastic body of the rubber or spring that connects the fixed base plate and the movable plate flexes for horizontal shaking, and the rubber plate of the fixed floor plate expands and contracts for vertical shaking, Reduce seismic force. A plurality of balls interposed between the fixed base plate and the movable plate facilitate the relative displacement between the two.

[0010]

According to the present invention, the floor panel can be directly placed on the upper part of the support column to construct the double floor, and the height of the elastic body can be reduced. The height can be made extremely small compared to the case where joists are used, and when installed in an existing building, the indoor height can be made sufficiently large, so of course not only for new buildings. Therefore, it can be applied to existing buildings without any problems. In addition, since the columns including the elastic members are integrated as a whole, the columns can be easily handled and the seismic isolation double floor can be constructed easily.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings. With reference to FIG. 1, a seismic isolation double floor according to the present invention is fixed to and supported on a foundation floor surface (1) integral with a building frame, and a pillar (2) supported on the pillar (2). It is composed of a floor panel (3) connected to each other, and a plurality of floor panels (3) are arranged on the same plane while being supported by columns (2), and a predetermined space is provided above the foundation floor surface (1). Keep and make a double floor. The constructed double floor surface is separated from the foundation floor surface (1) by the pillars (2), and the peripheral part of the double floor surface is separated from the wall surface of the building frame and terminated, thus The entire floor has a structure that is separated from the building body,
As will be described later, by absorbing the seismic force by the pillars (2), even if the building frame is shaken by the earthquake, the double floor surface becomes a seismic isolated floor that is protected from the earthquake.

The support column (2) has a lower fixed base plate (20), an elastic leg (21) integrally joined to the fixed base plate (20), and an upper end of the elastic leg (21). Movable plate (22) that is joined to the movable plate (22), the elastic leg (23) attached to the center of the movable plate (22), and the elastic leg (23) are screwed so as to be vertically retractable. It consists of a panel support plate (24).

The fixed base plate (20) is made of a rectangular or circular metal plate as shown in the drawing, an elastic plate (25) can be inserted and attached to the center, and the elastic legs (21) are integrated. . Elastic Plate (25)
Is an elastic plate (25) that is elastically expanded and contracted by a vertical load, and is made of, for example, a rubber plate and is attached to the center of the fixed base plate (20).
May be integrated with the fixed base plate (20) and the elastic legs (21). A plurality of annular grooves (26) are preferably formed on the bottom surface of the elastic plate (25) so as to exhibit a desired elasticity, and a plurality of half grooves for preventing balls from falling off are formed on the upper surface thereof. Circular ridges (27) are formed along the outer peripheral edge. Also, elastic plate
A metal ball receiving plate (28) is integrally superposed on the upper surface of (25) to facilitate rolling of a ball described later. The upper surface of the ball receiving plate (28) and the outer peripheral upper surface of the elastic plate (25) are mounted flush with each other, and the three stopper projections (29) set up on the upper surface of the elastic plate (25) are provided with balls. It projects upward from the hole (30) of the backing plate (28).

The elastic legs (21) are made of thin plate-like rubber pieces arranged at equal intervals in four diametrical positions. The lower part is a fixed base plate (20) and the upper part is a movable plate (22). It has a structure in which it is vulcanized and bonded to be integrated, and the rubber pieces (31) having a ring-like thickness are connected between the rubber pieces. The upper and lower surfaces of the outer peripheral edge of the movable plate (22) are covered with a rubber cover (32),
Wiring is protected.

Between the movable plate (22) and the ball receiving plate (28), a plurality of (3 in the illustrated embodiment) balls (3) made of steel balls are provided.
3) is arranged, and when the fixed base plate (20) and the movable plate (22) are displaced relative to each other in the horizontal direction due to an earthquake, they roll to ensure a smooth displacement movement.

Reference numeral (34) is a ring that holds the balls (33) together, and is held by the stopper projection (29). However, when the movement shifts due to an earthquake, this stopper projection (29) is the ring (34). Easily cut off with balls (33) and rings (34)
Free movement is allowed.

The elastic leg (23) is composed of a screw tube (35) fixed to the center of the movable plate (22) and a screw rod screwed into the screw tube (35).
It consists of (36) and. In the illustrated embodiment, a threaded rod (36)
Is a turnbuckle type in which the upper and lower screws are reversed, but it goes without saying that it is not limited to this. Screw rod (36)
A panel support plate (24) is screwed into the upper part of the so as to be vertically movable. Further, as shown in FIG. 5, a screw rod (36) may be installed in the movable plate (22) and the panel support plate (24) may be directly screwed into the movable plate (22) so as to be vertically movable.

The panel support plate (24) has a cross section in which the periphery is bent downward substantially vertically.

[Outer 1] Has a screw tube (37) with which the screw rod (36) is screwed, and a plurality of engaging projections (38) projecting upward in a hemispherical shape are predetermined. They are regularly arranged at intervals. In the illustrated embodiment, four engaging protrusions (38) are formed around the central screw cylinder (37), but the number is not limited to this. The top of the engaging protrusion (38) is formed into a horizontal flat surface, and a screw hole (39) is formed in the center thereof.

On the floor panel (3) which constitutes the actual floor surface,
The engaging recesses (40) into which the engaging protrusions (38) engage are arranged regularly in a lattice pattern, and the hemispherical engaging protrusions (38) and recesses
Engage with (40) and tighten with screws (41) to fix. The floor panel (3) and the panel support plate (24) are disclosed in detail in Japanese Patent Application No. 5-100186 filed previously by the present inventor.

In order to construct a double floor, first the foundation floor surface (1)
After adhering and fixing the support (2) at a predetermined interval above,
The height of the panel support plate (24) is adjusted so that the panel support plate (24) is positioned on the same horizontal plane, and is attached to the support column (2). Then, the floor panel (3) is placed on the panel support plate (24), and the engaging projection (38) is fitted into the engaging recess (40) and connected to construct a double floor. .

When an earthquake force is applied, the fixed base plate (20) fixed on the foundation floor surface (1) moves in the horizontal direction together with the foundation floor surface (1), but the floor panel ( The movable plate (22) supporting 3) relatively shifts in the horizontal direction due to the elastic bending of the elastic legs (21), the horizontal force of the seismic force is absorbed, and the floor panel (3) is not moved. Practically gone. Further, with respect to vertical vibration, the vertical movement transmitted to the movable plate (22) is absorbed by the elastic expansion and contraction of the elastic plate (25) via the balls (33), so that the floor panel (3). The vertical movement of is also virtually eliminated.

FIG. 6 shows a modification, in which the central portion of the elastic plate (25) is slightly recessed in an arc shape so that the balls (33) are gathered at the center. This eliminates the need to use a ring (34) that collects and holds the ball (33).

7 and 8, the elastic leg (21) is replaced by a spring (42) instead of a rubber piece, and a fixed base plate (20) and a movable plate (22) are used.
It is stretched at a diametrically opposed position between the and. The fixed base plate (20) is fixed on the foundation floor surface (1) via a coil spring (43) which absorbs vertical vibrations. The coil spring (43) may be interposed between the movable plate (22) and the panel support plate (24).

9 and 10 show still another embodiment of the present invention, in which a fixed base plate (20) also serving as a ball receiving plate and a movable plate (22) are formed by a plurality of elastic columns (44) made of rubber. The elastic columnar body (44) allows horizontal displacement movement by connecting them. Further, the screw cylinder (35) or the screw rod (36) is fixed to the center of the upper surface of the movable plate (22) through an elastic plate (45) made of rubber that absorbs vertical vibrations. In the illustrated embodiment, the elastic columnar bodies (44) are provided in the form of columns each having one columnar member at each of the four corners, but the present invention is not limited to this.
Further, instead of the elastic plate (45), one having the same shape as the elastic columnar body may be used.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line AA of FIG.

FIG. 2 is a perspective view

FIG. 3 is an exploded perspective view

FIG. 4 is a plan view.

FIG. 5 is a longitudinal sectional view of a modification.

FIG. 6 is a longitudinal sectional view of another modification.

FIG. 7 is a plan view of still another modification.

FIG. 8 is a sectional view taken along the line BB of FIG.

FIG. 9 is a perspective view of still another modification.

FIG. 10 is a sectional view of FIG.

[Explanation of symbols]

 (1) Foundation floor (2) Support post (3) Floor panel (4) Connecting screw (5) Exit closure (6) Lid (7) Bus (8) Tile carpet (9) Wiring (10) Wiring support bar (11) Desk (12) Flexible pipe (13) Smoke hood (14) Exhaust means (15) Flat surface (16) Paper piece (17) Cut and raised piece (18) Ashtray support (19) Ashtray support (20) Fixed base plate (21) Elastic legs (22) Movable plate (23) Elastic legs (24) Panel support plate (25) Elastic plate (26) Annular groove (27) Ridge (28) Ball receiving plate (29) Stopper protrusion (30) Hole (31) Rubber ring (32) Rubber cover (33) Ball (34) Ring (35) Screw tube (36) Screw rod (37) Screw tube (38) Engagement protrusion ( 39) Screw hole (40) Engagement recess (41) Screw (42) Spring (43) Coil spring (44) Elastic column (45) Elastic plate

Claims (11)

[Claims] 1. A movable plate and a foundation of a building frame supporting the movable plate so that when the building frame vibrates due to an earthquake, the horizontal vibrations move horizontally so that seismic energy can be absorbed. A panel that includes a fixed base plate installed on the floor surface, and an elastic body that can reduce a horizontal seismic force is interposed between the movable plate and the fixed base plate to support the floor panel in the upper center of the movable plate. A support plate and a column having an adjusting member that can vertically move the panel support plate, and a floor panel of a predetermined size.The panel support plate is connected to the floor panel with connecting screws while fitting with each other. A seismically isolated double floor characterized in that a floor panel is placed and connected on a panel support plate. 2. An elastic body is provided on at least a part of the fixed base plate so that when the building frame vibrates due to an earthquake, the vibration energy in the vertical direction can be absorbed. Seismic isolation double floor as described. 3. An elastic body is arranged between the movable plate and the panel support plate so as to absorb the vibration energy in the vertical direction when the building frame vibrates due to an earthquake. ) Seismically isolated double floor. 4. The seismic isolation duplex according to claim 1, wherein the elastic body interposed between the movable plate and the fixed base plate is made of a rubber piece and is fixed by vulcanization adhesion. floor. 5. The adjusting member comprises a screw rod in which a screw provided on the panel support plate side of the support column and a screw provided on the leg plate side are reversed, and the floor panel of the floor panel is mounted and connected to the panel support plate. The seismic isolated double floor according to any one of claims 1 and 2, characterized in that the pillar can be vertically moved up and down by rotating from above the four corners. 6. A rubber plate as an elastic body is vulcanized and fixed to at least a part of at least the outer peripheral lower surface of the movable plate of the column, and a bottom plate is vulcanized and fixed to the rubber lower surface to receive one or more balls of the same diameter. The seismic isolated double floor according to any one of claims (1) and (2), characterized in that the base is placed on a plate and the central portion of the lower surface of the movable plate is supported by the sphere. 7. A bottom plate, which has a circular hole with the same diameter as the inner circumference of the rubber and is larger than the outer circumference of the rubber, is vulcanized and fixed to at least a part of the outer circumference of the horizontal circular movable plate of the column, and the bottom plate is larger than the outer circumference of the rubber on the lower surface of the rubber. A shallow cylindrical enclosure member is temporarily fixed and placed in the center of the circular ball receiving plate that is vulcanized and fixed and inscribed in the circular hole, and the enclosure member is larger than the height of one or more enclosure members in the enclosure member. A diameter ball is placed, and the movable plate is supported by the ball.
(6) Seismic isolation double floor. 8. A bottom plate, which has a circular hole with the same diameter as the inner circumference of the rubber and is larger than the outer circumference of the rubber, is vulcanized and fixed to at least a part of the lower surface of the outer circumference of the horizontal circular movable plate of the strut. A shallow tubular enclosure member is temporarily fixed and placed in the center of a circular leg plate receiving plate that is vulcanized and adhered, is inscribed in the circular hole, and has at least a part of its lower surface vulcanized and adhered with rubber. The seismically isolated double floor according to claim (2), wherein one or more spheres having the same diameter larger than the height thereof are placed inside and the leg plate is supported by the spheres. 9. A rubber ball is vulcanized and fixed to at least a part of the lower surface at the periphery and in the vicinity of the center to a position equidistant from the center of a circular ball receiving plate, and the rubber penetrates the ball receiving plate to form an ultrafine shape. Three or more pieces are erected to form a temporary fixing material, a shallow tubular enclosure member is placed inside the temporary fixing material, and one or more spheres having the same or larger height are placed in the enclosure member. The seismically isolated double floor according to claim 8, wherein the leg plate is supported. 10. A bottom plate, which has a circular hole of the same diameter as the inner circumference of the rubber and is larger than the outer circumference of the rubber, is fixed to the lower surface of the outer circumference of the horizontal circular movable plate of the support column by vulcanization and fixation. One or more spheres with the same diameter are vulcanized and fixed, and the center of the circular hole is slightly indented in the circular hole and rubber is vulcanized and fixed to at least a part of the lower surface of the circular plate-shaped ball receiving plate. The movable plate is mounted and supported by the sphere.
(2) Seismic isolation double floor as described. 11. A rubber as an elastic body is vulcanized and fixed to at least a part of an outer peripheral lower surface of a movable plate of the support column, a bottom plate is vulcanized and fixed to the lower rubber surface, and the lower surface of the movable plate is a smooth ball receiving plate. The seismic isolated double floor according to claim 1 or 2, which has been placed.