JPH07122349B2 - Natural period variation type laminated rubber seismic isolation device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a natural period variation type laminated rubber seismic isolation device for reducing seismic force acting on a building.

The present invention is divided into 1) a natural period variation mechanism that improves the performance of a laminated rubber seismic isolation device, and 2) a control mechanism that utilizes buckling deformation of an elastic thin plate laminate. First, regarding 1), a conventional technique, a problem to be solved by the invention, means for solving the problem, and an operation will be described.

(Prior Art) In a conventional seismic isolation device using laminated rubber, a plurality of laminated rubbers are installed between a foundation and a structure to support the structure in a horizontally movable state and prevent resonance. A vibration damping device is installed to reduce the horizontal seismic force acting on the building.

Vibration damping devices are a) those that utilize elasto-plastic deformation of steel materials, b) those that utilize the shear resistance of viscous bodies, c) those that utilize the flow resistance of fluids, d) those that utilize frictional forces, e)
A combination of some of a) to d) is used. In addition, in order to improve the restoring performance of the seismic isolation device, a laminated rubber having a large horizontal spring constant is used as the laminated rubber.

(Problems to be solved by the invention) From the viewpoint of performance, the requirements for an ideal seismic isolation device (for horizontal seismic force) are: i) relative displacement of the building in the horizontal direction with respect to the foundation Then, the deformation resistance of the seismic isolation device is zero, ii) the natural period of the seismic isolation device is infinite, and iii) the ability to return the building to its original position.

If i) is satisfied, the horizontal seismic force acting on the structure will be zero regardless of any earthquake. As the deformation resistance increases from zero, the horizontal seismic force acting on the building also increases, so it is better that the seismic isolation device has as little deformation resistance as possible.

If ii) is satisfied, it will have seismic isolation capability and will not resonate against earthquakes of any vibration period.
The seismic isolation device can reduce the seismic force acting on the building.
Since the vibration period is limited to earthquakes smaller than the natural period of the seismic isolation device, the natural period of the seismic isolation device should be as large as possible. In addition, if the proper circumference of the seismic isolation device is not infinite,
A device that avoids resonance is needed.

The deformation resistance of the seismic isolation device increases as the horizontal spring constant of the laminated rubber used increases. Further, when the vibration damping device as in the above a) to e) is used, the deformation resistance of the seismic isolation device becomes large as compared with the case where only the laminated rubber without the vibration damping device is used. In the case of a conventional seismic isolation device, it is necessary to use a laminated rubber with a large horizontal spring constant and a large deformation resistance in order to secure a restoring force, and in addition to considering the worst expected resonance, the deformation resistance is considerably high. Since it is necessary to install a large vibration damping device, the deformation resistance of the seismic isolation device becomes considerably large. Further, since the natural period of the seismic isolation device decreases as the deformation resistance increases, the range of earthquakes that can be seismically isolated is considerably limited in the case of the conventional seismic isolation device.

From the above, although the conventional laminated rubber seismic isolation device has a certain degree of seismic isolation capability in the case of a specific earthquake, it is clear that the performance as a seismic isolation device is still insufficient.

(Means for Solving Problems) In the present invention, the horizontal spring constant of the seismic isolation device is reduced by the following method to improve its performance. In the present invention, instead of the laminated rubber of the conventional seismic isolation device, a laminated rubber building supporting device in which two laminated rubbers are joined via a connecting body is used. use.

(1) Instead of the vibration damping device, a mechanism was adopted that avoids resonance by varying the natural period of the seismic isolation device. If a vibration damping device is installed, the horizontal spring constant of the seismic isolation device will be larger than when using only laminated rubber, but in the case of this natural period fluctuation type resonance avoidance mechanism, the horizontal spring constant will not increase. The horizontal spring constant of the seismic isolation device is almost determined by the horizontal spring constant of the laminated rubber building support device used.

(2) By using a restoration promoting mechanism that compensates for the restoring force of the laminated rubber building support device, the laminated rubber building support device having a small horizontal spring constant can be installed. The restoration promotion mechanism uses small vibrations before the end of the earthquake to restore the seismic isolation device to its original shape.

(3) The seismic isolation device is provided with an operating mechanism so that a laminated rubber building support device having a small horizontal spring constant can be used.
When a laminated rubber building support device having a small horizontal spring constant is used, the restoring force is insufficient and the building may be shaken by wind pressure or the like. To prevent this
Normally, we installed an operating mechanism that constrains the deformation of the seismic isolation device and activates the seismic isolation device only when an earthquake that requires seismic isolation occurs.

(Operation) The seismic isolation device is constantly restrained from being deformed by the vibration control device. When the wind pressure acts on the building, the vibration control device does not activate the seismic isolation device, so that the building does not shake. Even if a small earthquake occurs, the vibration control device does not activate the seismic isolation device. Therefore, at this time, the building vibrates together with the foundation and the ground.

When a medium earthquake or a large earthquake occurs, the vibration control device releases the deformation constraint and activates the seismic isolation device. by this,
The seismic isolation device enters into long-period seismic isolation vibration in which each laminated rubber building support device is entirely deformed, and the building slowly vibrates in its own oscillation cycle regardless of seismic motion. Since the horizontal seismic force acting on the building due to this vibration is small, the building is not damaged or the furniture is not fallen down.

When a long period of vibration appears in the earthquake motion and the seismic isolation device is likely to resonate, the vibration control device converts the deformation of each laminated rubber building support device from the whole deformation state to the partial deformation state. When entering the partially deformed state, each laminated rubber building support device deforms only a part of the upper part thereof, and the seismic isolation device performs short-period seismic isolation vibration. A laminated rubber restraint device is provided alongside each laminated rubber building support device. When the laminated rubber restraint device is in a restrained state, the laminated rubber building support device is in a partially deformed state, and when it is in a released state, it is in a totally deformed state. When the seismic isolation device enters from the long-period seismic isolation vibration to the short-period seismic isolation vibration, resonance of the seismic isolation device is avoided. In the case of short-period seismic isolation vibration, the seismic isolation device can prevent the ground motion from being amplified and acting on the building, but cannot reduce the horizontal seismic force acting on the building. However, since the earthquake motion at this time is a long-period vibration with a small acceleration, the horizontal seismic force acting on the building will be slight unless the earthquake motion is amplified.

When a short period of vibration appears in the earthquake motion and the seismic isolation device is about to resonate, the vibration control device returns each laminated rubber building support device to the entire deformed state, and avoids the resonance of the seismic isolation device.

When the seismic motion decreases, the vibration control device gradually restores the seismic isolation device to its original shape by using the small vibration. Following this, the structure will return to its original position when the earthquake subsides.

Next, 2) a conventional technique relating to a control mechanism utilizing buckling deformation of an elastic thin plate laminate, problems to be solved by the invention, means for solving the problems, and actions will be described.

(Prior Art) In the example of the conventional natural period fluctuation type seismic isolation device (pillar-type building seismic isolation device having inspection work space, patent application number 59-221997), the operation of the seismic isolation device and conversion of the natural period are performed. In the vibration control device for performing the above, a mechanism in which the laminated body I and the laminated body II are arranged in series is used.

The laminated body I and the laminated body II are formed by stacking a large number of metal thin plates slightly curved into a cylindrical shell shape, and have the following characteristics. a) When a compressive force is applied in the cylinder axis direction,
The laminate undergoes little deformation until the compressive force reaches the buckling load of the laminate. b) When the compressive force reaches the buckling load, the laminate suddenly undergoes buckling deformation. (The buckling load at this time is called unconstrained buckling load) c) If the compressive force is removed before the buckling deformation becomes excessive, the laminated body returns to its original shape again. d) If the lateral pressure is applied to both plate surfaces of the laminated body in advance, the buckling load of the laminated body becomes larger than that in the case where the lateral pressure is not applied. (The buckling load at this time is referred to as a restraining buckling load.) The laminated body II is provided with a buckling restraint device that can apply a lateral pressure to the plate surface of the laminated body II as needed. In the laminated body I and the laminated body II attached to the vibration control device, the unconstrained buckling load of the laminated body II is smaller than the unconstrained buckling load of the laminated body I, and the constrained buckling load of the laminated body II is ,
It is made to be larger than the unconstrained buckling load of the laminate I.

When an earthquake occurs and horizontal shearing force acts on the seismic isolation device,
An axial compressive force acts on the laminate I and the laminate II. At this time, since the buckling restraint device of the laminated body II is in the released state, when the horizontal shear force acting on the seismic isolation device exceeds the operating shear force, the axial compression force causes the laminated body II to buckle and deform. . As a result, the seismic isolation device is activated, and long-period seismic isolation vibration is entered. When the long-period base isolation vibration is likely to resonate, the buckling restraint device restrains the laminated body II from buckling. As a result, the laminated body I is buckled and deformed instead of the laminated body II, and the seismic isolation device enters short-period seismic isolation vibration. When resonance is likely to occur in the short-period seismic isolation vibration, the buckling restraint of the laminated body II is released, and the laminated body II causes buckling deformation instead of the laminated body I, and the seismic isolation device has a long-period seismic isolation vibration. to go into.

In order to ensure switching from long-period seismic isolation vibration to short-period seismic isolation vibration or from short-period seismic isolation vibration to long-period seismic isolation vibration, laminate II against unconstrained buckling load of laminate II
The ratio of the constrained buckling load of is at least about 1.5 times.

The conventional buckling restraint system for seismic isolation devices is composed of a telescopic pressure-bearing body mounted on a bogie and a solenoid for moving the bogie.These devices are provided on the concave plate side and the convex plate side of the laminated body II. It is installed in each. The expansion and contraction pressure bearing body is formed by stacking a dozen or more light metal plates having a convex cylindrical surface or a concave cylindrical surface formed so as to be in close contact with the plate surface of the laminated body II via a spring. It can be expanded and contracted in the axial direction.

When the buckling restraint device is in the released state, the laminated body II is held in a loosely coupled state in which the thin metal plates are lightly adhered to each other. When the buckling restraint device is in the restrained state, the plate surface of the laminate II is pressed by the expandable pressure bearing member, and the thin metal plates are in close contact with each other.

(Problems to be Solved by the Invention) The unconstrained buckling load of the laminated body II changes depending on the degree of adhesion of the metal thin plates, and the stronger the metal thin plates are in close contact with each other, the larger the buckling load. Therefore, in order to keep the unconstrained buckling load constant, the unconstrained thin metal plate must always be held with a constant degree of adhesion. Moreover, in order to increase the ratio of the restrained buckling load to the unconstrained buckling load as much as possible, it is necessary to hold the thin metal plate as loose as possible in the unconstrained state. However, when the buckling restraint device is restrained and the thin metal plates are tightly adhered to each other, even if the buckling restraint device is released, the original loose state cannot be restored. Therefore, the conventional buckling restraint device requires a device for returning the laminated body II to its original loose state, for example, a device for applying vibration or impact.

(Means for Solving Problems) In the conventional buckling restraint device, the thin metal plates of the laminated body II are strongly adhered to each other to increase the constrained buckling load of the laminated body II. The buckling restraint device described in (1) increases the restraining buckling load of the laminate II by deforming the cylindrical curved surface of each metal thin plate into a curved surface having a larger curvature.

The buckling restraint device of the embodiment of the present invention has a convex pressing body and a concave pressing body in which a cylindrical curved surface having a larger curvature than the curved surface of the metal thin plates constituting the laminated body II is formed. The convex pressing body is arranged on the concave plate surface side of the laminate II, and the concave pressing body is arranged on the convex plate surface side of the laminated body II to press the plate surface. The convex pressure member and the concave pressure member are formed by polymerizing a plurality of convex surface members or concave surface members, and are capable of expanding and contracting in the axial direction of the laminated body II. In the case of the embodiment of the present invention, the convex pressure member and the concave pressure member are pressed against the plate surface by using a vacuum device, but as in the conventional buckling restraint device, a solenoid is added to the force applying device. It is also possible to use

(Operation) When the buckling restraint device of the embodiment of the present invention is brought into a restrained state, the concave pressure body supports both ends, the convex pressure body pushes the central portion, and the laminated body II has a concentrated load on the central portion. Bending in a state similar to that of a simple burr that acts on the sheet metal increases the curvature of the curved surface of each thin metal plate. In the case of a cylindrical shell-shaped thin metal plate having a not so large curvature, the buckling load remarkably increases when the curvature becomes slightly larger. The rate of increase in curvature, that is, the rate of increase in the restraining buckling load, is the magnitude of the force acting on the convex and concave pressure bodies, or the curvature of the curved surface of the convex and concave pressure bodies. Can be freely adjusted by.

When the buckling restraint system of the embodiment of the present invention is released, the elastic metal sheet returns to the original curvature again, and the unconstrained buckling load also returns to the value before the buckling restraint system was restrained. . Since the restoring force of the metal thin plate is quite strong, when the buckling restraint device is released, the metal thin plate automatically returns to the original curvature, and the unconstrained buckling load always shows a constant value. This is a feature of the buckling restraint system.

Example FIG. 1 and FIG. 2 show a part of a building (1) on which the seismic isolation device of the present invention is installed and its foundation (2). The seismic isolation device of the present invention is composed of laminated rubber building support devices (3) (3) ..., Laminated rubber restraint devices (4) (4) ..., and vibration control devices (5) (5). .

3 to 5 are detailed views of the laminated rubber building support device (3) and the laminated rubber restraint device (4) of the present invention.

The laminated rubber building support device (3) includes two laminated rubbers (8) formed by alternately laminating a rubber (6) and a steel plate (7).
(8) is polymerized via a connecting body (9), and mounting plates (10) and (10) are provided on the upper and lower sides. The connecting body (9) is fixed to the upper and lower laminated rubbers (8) (8), and is attached to the mounting plates (10) (1).
0) is fixed to the laminated rubber (8). Further, the lower mounting plate (10) is fixed to the foundation (2), and the upper mounting plate (10) is fixed to the lower surface of the building (1). The laminated rubber building support devices (3) (3) ... Are installed directly under the main pillars or main walls of the building (1).

The laminated rubber restraint device (4) is a horizontal moving body (1) provided by being connected to a connecting body (9) of the laminated rubber building support device (3).
1) and two restraint devices (12) (12) for restraining the movement of the horizontal moving body (11).

The horizontal moving body (11) includes a flat plate-like body (14) having a connecting body holding frame (13) at its central portion, and eight vertical connecting rods (15) for supporting the flat plate-like body (14) in a horizontally movable manner. It is composed of (15). The connecting body holding frame (13) is connected to the connecting body (9) so as to be capable of relative displacement in the vertical direction. The vertical connecting rod (15) has the upper end on the lower surface of the plate-like body (14) and the lower end through the universal joint (16) and the bottom plate (1) of the restraint device (12).
7) Each is connected to the top surface.

The restraint device (12) includes a bottom plate (1) fixed to the foundation (2).
7), vertical cylinder (18) provided on the bottom plate (17),
Support materials (19) (19) for supporting the vertical cylinder (18),
The vertical cylinder device (22) is composed of a piston (20) and a spring (21) inserted into the vertical cylinder (18), and a convex body (23) and a concave body (24). The convex body (23) has a conical convex surface on the upper surface, and the concave body (24) has a conical concave surface on the lower surface. The convex body (23) is fixed to the head of the piston (20), and the concave body (24) is fixed to the lower surface of the flat plate (14). Since the piston (20) is pushed upward by the spring (21) and hydraulic pressure, the conical convex surface of the convex body (23) and the conical concave surface of the concave body (24) are in mesh with each other.

FIG. 11 is an explanatory diagram showing each device of the embodiment of the present invention and the connection relationship of each device. The vibration control device (5) includes a laminated body control cylinder device (25), a hydraulic device (26), a vacuum device (27), and a microcomputer device (28).

6 and 7 are detailed views of the laminated body control cylinder device (25) of the present invention. Stack control cylinder device (2
5) is the main cylinder device (29) and the sub cylinder device (30)
(30), the laminated body II device (31), the laminated body I device (32), the convex body (33), the concave body (34), and the support frame (35).

The main cylinder device (29) is inserted into the upper cylinder (36) fixed to the upper center of the support frame (35), the lower cylinder (37) connected to the upper cylinder (36), and the upper cylinder (36). Large piston (38), small piston (39) inserted into the lower cylinder (37), connecting rod (40) connecting the large piston (38) and small piston (39), inserted into the upper cylinder (36) Spring (41), lower cylinder (37)
It is composed of a valve piston (42) inserted into the lower cylinder (37) and an annular outflow passage (43) attached to the lower cylinder (37).

The upper cylinder (36) is provided with an upper outlet (44) and a lower outlet (45), respectively. Upper outlet (44)
The lower outlet (45) is formed so that the outlet gradually becomes smaller when the large piston (38) further descends from a predetermined position. The lower cylinder (37) is provided with an annular outlet (46) communicating with the outflow passage (43).
The annular outlet (46) is closed by the valve piston (42) when the valve piston (42) is in the home position.

The sub-cylinder device (30) includes a cylinder (47) fixed to the support frame (35), a valve piston (48) inserted into the cylinder (47), and an annular outflow attached to the cylinder (47). It is composed of a road (49). Cylinder (4
The upper part of 7) is closed and the lower part has an annular outlet (50) leading to the outflow channel (49). Annular outlet (50)
Is closed by the valve piston (48) when the valve piston (48) is in the home position.

8 to 10 are enlarged detailed views of the laminate II device (31) of the present invention. The laminate II device (31) includes a pressure bottom plate (51) fixed to the bottom plate of the support frame (35), a laminate II (52) installed on the pressure bottom plate (51), and a laminate II (5).
Pressure top plate (53) placed on top of 2), laminated body II (5
Convex pressure body (54) installed on the concave plate surface of 2), laminated body II (5
Concave pressure body (55) and laminated body II (5) installed on the convex plate surface of 2)
2) by the covering rubber (56) for sealing the convex pressure body (54) and the concave pressure body (55), and the moving frame (57) connected to the pressure top plate (53). Composed. Convex pressure body (54), concave pressure body (55), and covering rubber (56)
Is connected to the vacuum device (27) to form a buckling restraint device for the laminate II (52).

As shown in FIGS. 6 and 7, a laminated body I device (32)
Is a pressure bottom plate (5) installed on the top of the frame (57) during movement.
8), laminated body I (59) installed on the pressure bottom plate (58),
Pressure top plate (60) placed on top of laminate I (59), coating rubber (61) for covering laminate I (59), pressure top plate (6)
Upper pressure plate (62) installed on the upper part of (0), and upper pressure plate receivers (63) (63) fixed on the upper part of the moving frame (57)
Composed by.

The pressure bottom plates (51) (58) and pressure top plates (53) (60) are moved to the surface of the laminated body II (52) or laminated body I (59) toward the edge as shown in FIG. A strip-shaped pressure surface (64) parallel to the inner frame (57) is formed on the laminated body.
Both edges of the II (52) or the laminated body I (59) are configured to contact only the strip-shaped pressure surface (64). Also,
The pressurizing top plate (53) is provided with an exhaust port (65) and an intake port (66) communicating with the inside of the covering rubber (56).

As shown in FIGS. 8 to 10, the laminated body II (52) and the laminated body I (59) are formed by stacking a large number of rectangular metal thin plates (67) (67) ... It is a combination. In the laminated body II (52) and the laminated body I (59), the edges of the metal thin plates (67) (67) ... are added to the pressure bottom plates (51) (58) or the pressure top plates (53) (60). It is installed so as to be orthogonal to the pressure surface (64).

The convex pressing body (54) has a plurality of convex members (68) having a convex cylindrical surface with a curvature larger than the curved surface of the metal thin plates (67) (67) on the side of the laminated body II (52) with respect to the concave plate surface. (68) is formed by polymerizing. The convex surface members (68) (68) are divided into an upper group and a lower group, and an expansion / contraction space (70) held by two springs (69) is provided at a connecting portion between the upper group and the lower group. It is provided. The rubber plates (71) (71) are attached to both wings of the convex members (68) (68), and the convex member (68) below the expansion space (70) has an expansion space. A connection plate (72) surrounding the three sides of (70) is attached.

The concave pressing body (55) has a plurality of concave members (73) having a concave cylindrical surface having a curvature larger than the curved surface of the metal thin plates (67) (67) on the side of the laminated body II (52) with respect to the convex plate surface. (73) is formed by polymerizing. The concave members (73) (73) are divided into an upper group and a lower group, and an expansion / contraction space (75) held by two springs (74) is provided at a connecting portion between the upper group and the lower group. It is provided. In addition, in the concave surface material (73) at the bottom of the expansion and contraction space (75),
A connection plate (76) surrounding three sides of the expansion / contraction space (75) is attached.

The coated rubber (56) (61) has a tubular main body and upper and lower flanges made of rubber having excellent expansion and contraction performance and sealing performance. The covering rubbers (56) (61) are attached to the pressure bottom plates (51) (58) and the pressure top plates (53) (60) with the outer peripheral bands of the flanges in close contact with each other.

As shown in FIGS. 6 and 7, it is framed during movement (57).
Slides up and down along the guides of the support frame (35) and can be lowered until the tips of both legs come into contact with the bottom plate of the support frame (35). The valve pistons (48) of the sub-cylinder devices (30) (30) are connected to the upper portions of the moving frames (57), respectively. Valve piston (48)
Closes the annular outlet (50) of the cylinder (47) when the laminated body II (52) does not buckle, and when the laminated body II (52) buckles, it moves along with the frame (57) during movement. It descends and opens the annular outlet (50).

The upper pressure plate (62) slides up and down along the guides of the support frame (35), and the upper pressure plate receiver (63) (6)
It can descend until it contacts the tip of 3). The valve piston (42) of the main cylinder device (29) is connected to the upper portion of the upper pressure plate (62). The valve piston (42) descends together with the upper pressure plate (62) to the annular outlet (46) when either or both of the laminated body II (52) and the laminated body I (59) are buckled and deformed. Open.

The convex body (33) has a conical convex surface on the upper surface, and the concave body (3
4) has a conical concave surface on the lower surface. Convex body (33)
Is fixed to the head of the large piston (38) of the main cylinder device (29), and the concave body (34) is fixed to the lower surface of the building (1). Since the large piston (38) is pushed up by the hydraulic pressure acting on the spring (41) and the small piston (39), the conical convex surface of the convex surface body (33) and the concave surface body (34).
The conical concave surfaces of are in the engaged state.

The laminated body control cylinder device (25) is installed on the foundation (2) and fixed by the retaining wall (77) and the support frame (78) so as not to laterally shake.

As shown in FIG. 11, the hydraulic device (26) includes an oil tank (7
9), oil pump (8) connected to the oil tank (79)
0), and each oil feed pipe.

The oil feed pipe connecting the oil tank (79) and the main cylinder device (29) of the laminated body control cylinder device (25) includes an oil feed pipe A (81) connected to the lower cylinder (37) and an outflow passage (43). Connected oil pipe B (82) and upper cylinder (36)
There is an oil feed pipe C (83) connected to the upper outlet (44) of the. The oil supply pipe A (81) is provided with a check valve A (84) and a solenoid valve A (85) for limiting the flow of hydraulic oil in the direction from the oil tank (79) to the lower cylinder (37). Mounted in parallel.

The oil feed pipe connecting the oil tank (79) and the auxiliary cylinder device (30) (30) of the laminated body control cylinder device (25) includes an oil feed pipe D (86) connected to the cylinder (47) and an outflow passage. There is an oil pipe E (87) connected to (49). The oil supply pipe D (86) is provided with a check valve D (88) for limiting the flow of hydraulic oil in the direction from the oil tank (79) to the cylinder (47).
Solenoid valves D (89) are mounted in parallel.

For other oil supply pipes, the vertical cylinders (18) (18) of the laminated rubber restraint device (4) and the laminated body control cylinder device (25).
Oil pipe F (90) that connects the cylinders (47) (47) of the above, and the upper cylinder (3) of the laminated body control cylinder device (25).
There is an oil feed pipe G (91) connecting the lower outlet (45) of 6) and the cylinder (47). The oil supply pipe G (91) is provided with a check valve G (92) for limiting the flow of hydraulic oil in the direction from the lower outlet (45) to the cylinder (47).

Vertical cylinders (18) (18) of laminated rubber restraint system (4),
The upper cylinder (36) of the laminated body control cylinder device (25),
Lower cylinder (37), Outflow passage (43), Cylinder (47)
(47), the outflow passage (49), and each part of the hydraulic device (26) are filled with hydraulic oil, and a constant hydraulic pressure is always maintained by the oil pump (80).

The vacuum device (27) includes a vacuum tank (93) and a vacuum tank (9
Vacuum pump (94) and vacuum tank (93) connected to 3)
And an exhaust pipe (95) that connects the exhaust port (65) of the stack control cylinder device (25), and the stack control cylinder device (2
5) The intake pipe (96) is connected to the intake port (66). The exhaust pipe (95) has a solenoid valve H (97).
However, the intake valve (96) is provided with a solenoid valve J (98), respectively. The atmospheric pressure in the vacuum tank (93) is the same as the vacuum tank (94).
Is always maintained at a constant value close to vacuum.

The microcomputer device (28) includes a microcomputer (99), a detecting device and its circuit, and an operating circuit of a solenoid valve.

The detector is a detector A (100) that detects the vibration of the ground,
Detector B (101) that detects the vibration of the building (1), detector C (102) that detects the horizontal relative displacement of the building (1) with respect to the foundation (2), and the seat of the laminated body II (52) A detector D (103) for detecting bending deformation, a detector E (104) for detecting buckling deformation of the laminated body I (59), and a circuit and an interface A (connecting each detector and the microcomputer (99). 105).

The operating circuit of the solenoid valve is solenoid valve A (85), solenoid valve D (8
9), solenoid valve H (97), and solenoid valve J (98) operating circuits, and these circuits and microcomputer (99)
It is configured by an interface B (106) that connects the two.

The operation and effect of the embodiment of the present invention are as follows.

(1) When the seismic isolation device does not operate When a small earthquake or wind pressure acts on the building (1), the building (1) tends to be horizontally displaced relative to the foundation (2). This allows the stack control cylinder device (2
The horizontal shearing force acts between the sliding pair consisting of the convex body (33) and the concave body (34) in (5), and the convex body (33) becomes the concave body (3).
Pushed down by 4). At this time, the oil pipe A (8
The solenoid valve A (85) of 1) is closed, and the annular outlet (46) of the lower cylinder (37) is also closed, so the small piston via the large piston (38) and the connecting rod (40). (39)
When a downward force is applied to, the hydraulic pressure in the lower cylinder (37) increases. Along with this, the valve piston (42) and the upper pressure plate (62) are pushed downward, and the axial compression force acts on the laminated body I (59) and the laminated body II (52). Laminated body II (52)
Although the buckling restraint device in Fig. 2 is in the released state, the laminated body I (59) and laminated body II (52) are designed so that they do not buckle in the event of a small earthquake or wind pressure. Even if a force is applied, buckling deformation does not occur in the laminated body I (59) and the laminated body II (52). Therefore, the annular outlet (46) remains closed by the valve piston (42), and the hydraulic oil in the lower cylinder (37) cannot flow out. Therefore, the convex body (33) receiving the downward force descends. Be blocked. If the convex body (33) cannot descend, the convex body (33) and the concave body (3
There is no slip between 4) and horizontal displacement relative to the building (1) and foundation (2). As a result, the building (1) vibrates integrally with the foundation (2) and the ground in the case of a small earthquake, and the building (1) does not shake when the wind pressure acts.

(2) Operation of seismic isolation device and long-period seismic isolation vibration FIG. 12 is an explanatory diagram showing a case where the seismic isolation device of the present invention enters into long-period seismic isolation vibration. In addition, the arrow in a figure has shown the direction where hydraulic fluid flows.

When a medium or large earthquake occurs, the same process as in (1) above is followed, and the axial compression force acts on the laminated body I (59) and laminated body II (52) of the laminated body control cylinder device (25). To do. The unconstrained buckling load of laminate II (52) is equal to that of laminate I (5
Since it is designed to be smaller than the unconstrained buckling load of 9), the convex body (3
The horizontal shearing force, which exceeds the operating shearing force, acts between the 3) and the concave body (34), and the laminate I (59) and the laminate II (52)
When an axial compressive force acts on the laminate, the laminate II (52) undergoes buckling deformation. The convex pressing body (54) and the concave pressing body (55) of the buckling restraint device compress the expansion spaces (70) (75) along with the buckling deformation of the laminated body II (52) to form a stepped shape. Therefore, the buckling deformation of the laminate II (52) is not obstructed. As a result, moving frame (57), laminated body I device (3
2), the valve piston (42) of the main cylinder device (29) and the valve piston (48) of the auxiliary cylinder devices (30) (30) descend together. When the annular outlet (46) is opened as the valve piston (42) is lowered, the hydraulic oil in the lower cylinder (37) passes through the outflow passage (43) and the oil feed pipe B (82) to the oil tank ( It flows to 79). At the same time, the small piston (39), the large piston (38), and the convex body (33) that are receiving the downward force descend, and the concave body (34) and the building (1) become the foundation (2). On the other hand, a relative displacement is generated in the horizontal direction. On the other hand, when the valve piston (48) of the sub cylinder device (30) (30) is lowered and the annular outlet (50) is opened, the inside of the vertical cylinders (18) (18) of the laminated rubber restraint device (4). Of the hydraulic fluid flows to the oil tank (79) through the oil feed pipe F (90), the cylinder (47), the outflow passage (49), and the oil feed pipe E (87). Therefore, when horizontal relative displacement occurs between the foundation (2) and the building (1) and the laminated rubber building support device (3) is deformed, the flat body ( 14) moves horizontally, and the convex body (23) and the piston (20) are pushed down by the concave body (24). Since the laminated rubber constraining device (4) is not restrained, the laminated rubber building supporting devices (3), (3), ... Are deformed because the upper laminated rubber (8) and the lower laminated rubber (8) are both deformed. The seismic device enters the long-period seismic isolation vibration.

The building (1) makes horizontal relative displacement in the opposite direction to the foundation (2), and the downward force does not act on the convex body (33) of the laminated body control cylinder device (25). Then, the convex body (33) is pushed upward by the spring (41) and hydraulic pressure. At the same time, the laminated body II (52) pushes up the frame (57) and the laminated body I device (32) during movement and returns to the original shape by itself. When the horizontal relative displacement between the foundation (2) and the building (1) progresses and the horizontal shearing force exceeding the working shearing force again acts between the convex body (33) and the concave body (34), the laminated body Buckling deformation occurs in II (52), and the seismic isolation device continues the long-period seismic isolation vibration following the above-mentioned process. As a result,
However strong the horizontal vibration of the ground is, the building (1) slowly vibrates with its own natural period, and the horizontal seismic force acting on the building (1) becomes small.

(3) Short-period seismic isolation vibration and avoidance of resonance FIG. 13 is an explanatory diagram showing a state where the seismic isolation device of the present invention enters short-period seismic isolation vibration. In addition, the arrow in a figure has shown the direction where hydraulic fluid flows.

When the seismic isolation device is operated as described in (2) above, the microcomputer device (28) becomes
9), the detector A (100), the detector B (101), and the detector C (102) are used to monitor the vibration state of the foundation (2) and the building (1). At this time, the seismic isolation device is performing long-period seismic isolation vibration, but if long-period vibration appears in the seismic motion and the seismic isolation device tends to resonate, the microcomputer (99) uses the detector D (103). Stack I
After confirming that the I (52) has returned to its original shape, the laminated body II (5
2) Put the buckling restraint device in the restrained state. Laminated body II (52)
If does not return to its original shape, open solenoid valve A (85) and solenoid valve D (89) to let out the hydraulic oil in the lower cylinder (37) and cylinders (47) (47), and stack II (Five
After returning 2) to the original shape, put the buckling restraint device in the restrained state. When putting the buckling restraint device into the restraint state, use the solenoid valve J
(98) is closed and solenoid valve H (97) is opened. When the buckling restraint is completed, the solenoid valve A (85) and the solenoid valve D (89) are closed. When this operation is performed, the atmospheric pressure inside the rubber cover (56) of the buckling restraint device is lowered, so that the convex pressure body (54) and the concave pressure body (55) are affected by the pressure difference between the inside and outside of the rubber cover (56). Upon receiving the generated pressure, the concave plate surface and the convex plate surface of the laminate II (52) are pressed. Convex pressure body (54) and concave pressure body (5
The curved surface of 5) is the thin metal plate (6
7) Since it is formed on a convex cylindrical surface or a concave cylindrical surface having a larger curvature than the curved surface of (67) ..., this pressurization transforms the curved surface of the thin metal plates (67) (67) ... into a curved surface having a larger curvature. . When the buckling restraint is in the restrained state, the stack II (5
Since the constrained buckling load of 2) is larger than the unconstrained buckling load of the laminate I (59), the horizontal shearing force exceeding the working shearing force between the convex body (33) and the concave body (34). Is working,
The laminated body I (5
9) buckles and deforms. When the laminated body I (59) is buckled and deformed, the upper pressure plate (62) and the valve piston (42) are lowered,
Since the annular outlet (46) of the lower cylinder (37) is opened, the working oil in the lower cylinder (37) flows into the outflow passage (43),
It flows into the oil tank (79) through the oil feed pipe B (82). As a result, the convex body (33) is pushed down by the concave body (34), and the horizontal relative displacement occurs between the foundation (2) and the building (1). On the other hand, since the laminated body II (52) does not buckle and the frame (57) remains in the original position during movement, the annular outlet (50) of the sub cylinder device (30) (30) is (Four
It will be closed by 8). Annular outlet (50)
Is closed, the flow of hydraulic oil from the vertical cylinders (18) (18) of the laminated rubber restraint device (4) to the oil tank (79) via the annular outlet (50) is stopped, so that the vertical cylinder ( 18) (18) piston (20) cannot move down. On the contrary, the hydraulic oil flows from the oil tank (79) to the vertical cylinders (18) and (18) via the check valve D (88), the oil feed pipe D (86), the cylinder (47) and the oil feed pipe F (90). Since it can flow, the convex body (23) of the laminated rubber restraint device (4)
(23) and pistons (20) (20) are concave bodies (24)
When (24) returns to its original position, it is pushed up to its original position by the spring (21) and hydraulic pressure. When the convex bodies (23) (23) are engaged with the concave bodies (24) (24) respectively,
The flat body (14) cannot be horizontally displaced relative to the foundation (2), and deformation of the laminated rubber (8) below the laminated rubber building support device (3) is restricted. by this,
The laminated rubber building supporting devices (3) (3) ... Start short-period seismic isolation vibration in which only the upper laminated rubber (8) is deformed. As a result, the natural period of the seismic isolation device is the upper and lower laminated rubber (8).
(8) becomes smaller than the natural period of the long-period base-isolated vibration that deforms, and the resonance caused by the long-period base-isolated vibration is avoided. When entering the short-period seismic isolation vibration, the seismic isolation device cannot reduce the horizontal seismic force acting on the building (1), but the seismic motion at this time is a fairly long-period vibration with small acceleration, Moreover, since the seismic isolation device does not amplify the ground motion and does not act on the building (1), the horizontal seismic force acting on the building (1) is small.

The microcomputer device (28) has a foundation (2) and a building (1) even after the seismic isolation device enters short-period seismic isolation vibration.
Continue to monitor the vibration of the. When a sign of resonance appears in the short-period seismic isolation vibration, the solenoid valve H (97) is closed and the solenoid valve J (98) is sequentially closed using the microcomputer (99), and the laminated body II ( 52) Open the buckling restraint system. When the atmospheric pressure in the covering rubber (56) returns to the atmospheric pressure, the lateral pressure due to the convex pressing body (54) and the concave pressing body (55) disappears, so that the metal thin plates (67) (67) of the laminated body II (52). )
The curved surface of ... returns to the original curvature. As a result, the convex body (3
When a horizontal shearing force exceeding the operating shearing force acts between 3) and the concave body (34), the laminated body II (52) is buckled and deformed by the axial compressive force, and the seismic isolation device (2)
Enter the long-period seismic isolation vibration. Then, the resonance caused by the short-period seismic isolation vibration is avoided. In this way, the microcomputer device (28) switches the natural period of the seismic isolation device from a long period to a short period or from a short period to a long period at any time to avoid resonance occurring in the seismic isolation device.

(4) Other actions and effects When the seismic isolation device is activated by an earthquake with a short period and large amplitude, the convex body (33) of the laminated body control cylinder device (25) rapidly descends a considerable distance. Stack at the same time
The II (52) buckles and the valve piston (42) of the main cylinder device (29) descends, but the frame (57) descends a certain distance during movement to prevent excessive deformation of the laminated body II (52). Then, the tips of both legs come into contact with the bottom plate of the supporting frame (35). For this reason, when the small piston (39) is rapidly lowered by a considerable distance, the hydraulic oil in the lower cylinder (37) may not flow out from the annular outlet (46). At this time, the laminated body II (52) and the laminated body I (59) are also buckled and deformed, the valve piston (42) is further lowered, and the annular outlet (46) is expanded to cause the hydraulic oil to flow out. Promote. The upper pressure plate receivers (63) (63) are devices for preventing excessive deformation of the laminated body I (59), and when the upper pressure plate (62) hits the upper pressure plate receivers (63) (63), they are laminated. Body I (59) can no longer be deformed.

It is dangerous that the horizontal relative displacement of the building (1) with respect to the foundation (2) exceeds the allowable deformation amount of the laminated rubber building support device (3). Therefore, the laminated body control cylinder device (25) is provided with the following deformation limiting buffer device.

In long-period seismic isolation vibration, if the horizontal relative displacement of the building (1) with respect to the foundation (2) becomes large, the convex body (3
The large piston (38) and the small piston (39) greatly descend through the 3). The large piston (38) is inserted into the large diameter upper cylinder (36), and the small piston (39) is inserted into the small diameter lower cylinder (37), and both pistons are connected by the connecting rod (40). As both pistons descend, the volume of the portion surrounded by the large piston (38) and the small piston (39) decreases. Therefore, in order for both pistons to descend, a part of the hydraulic oil filled between the large piston (38) and the small piston (39) must flow out of the cylinder. When the large piston (38) is descending above the upper outlet (44) of the upper cylinder (36), the hydraulic oil between the large piston (38) and the small piston (39) flows to the upper outlet (44). ) And the lower outlet (45). When the large piston (38) descends to a position where it closes the upper outlet (44), the hydraulic oil between the large piston (38) and the small piston (39) flows out from the lower outlet (45). When the large piston (38) further descends, the lower outlet (45)
Is gradually fitted by a large piston (38) and finally closed. When the lower outlet (45) is closed, the hydraulic oil between the large piston (38) and the small piston (39) cannot flow out, so the annular outlet (46) of the lower cylinder (37) is open. However, both pistons and the convex body (33) gradually slow down and stop gently. As a result,
The horizontal relative displacement of the building (1) with respect to the foundation (2) also stops gently as the convex body (33) moves.

In the case of short-period seismic isolation vibration, only the upper laminated rubber (8) is deformed, so the allowable deformation amount of the laminated rubber building support device (3) is smaller than in the case of long-period seismic isolation vibration. When the large piston (38) is descending above the upper outlet (44) due to short-period seismic isolation vibration, the hydraulic oil between the large piston (38) and the small piston (39) is ) Outflow. The oil supply pipe G (91) connected to the lower outlet (45) is connected to the cylinder (47) of the sub-cylinder device (30). In the case of periodic seismic isolation vibration, do not flow hydraulic oil. When the large piston (38) further descends, the upper outlet (44) is gradually fitted by the large piston (38) and then closed. Upper outlet (4
4) closed, large piston (38) and small piston (3)
Because the hydraulic oil between 9) cannot flow out, both pistons and convex body (33) gradually slow down and stop gently even if the annular outlet (46) of the lower cylinder (37) is open. To do. As a result, the horizontal relative displacement of the building (1) with respect to the foundation (2) also gently stops as the convex body (33) moves.

When the horizontal shear force acting between the convex surface body (33) and the concave surface body (34) of the laminated body control cylinder device (25) becomes smaller than the operating shear force near the end of the earthquake, the laminated body I ( Five
9) or the laminated body II (52) does not buckle even when subjected to an axial compressive force. Therefore, the hydraulic oil in the lower cylinder (37) stops flowing out, and the convex body (33) cannot descend. On the contrary, since the hydraulic oil can always flow into the lower cylinder (37) from the oil tank (79) via the check valve A (84) and the oil feed pipe A (81), the downward force does not act. Then, the convex body (33) is pushed up by the spring (41) and hydraulic pressure. As the convex body (33) is pushed up, the vibration range of the concave body (34) is gradually reduced, and the building (1) returns to its original position when the earthquake subsides.

In the laminated rubber restraint device (4) (4) ..., the laminated body II (52)
When is no longer buckled, the hydraulic oil in the vertical cylinders (18) (18) stops flowing out and the pistons (20) (20) and convex bodies (23) (23) cannot descend. On the contrary, the vertical cylinders (18) (18) have check valves D (88),
The hydraulic oil can always flow in from the oil tank (79) through the oil supply pipe D (86), the cylinder (47), and the oil supply pipe F (90), so that the piston (20) (2) becomes effective when the downward force stops acting.
0) and the convex bodies (23, 23) are pushed up by the spring (21) and hydraulic pressure. As the convex bodies (23) (23) are pushed up, the vibration range of the concave bodies (24) (24) is gradually reduced, and when the earthquake subsides, the flat body (14) returns to its original position.

When the microcomputer (99) learns that the earthquake has subsided by the detector A (100), the detector E (10)
4), the detector D (103), and the detector C (102) are used to return the laminated body I (59) and laminated body II (52) to the original shape,
Confirm that building (1) has returned to its original position. When the laminated body I (59) or the laminated body II (52) does not return to its original shape, the solenoid valve A (85) and the solenoid valve D (89) are opened to prompt the return of the original shape. Laminate I (59) or Laminate II (5
If 2) does not return to its original shape, or the building (1)
If does not return to the original position, the status is displayed on the monitoring device and finally the function of the microcomputer device (28) is stopped.

The hydraulic device (26) and the vacuum device (27) drive the oil pump (80) or the vacuum pump (94) according to the oil pressure of the oil tank (79) or the atmospheric pressure of the vacuum tank (93) regardless of the earthquake. It has a dedicated control device.

(Effect of the Invention) The ability to reduce the seismic force acting on a building is superior to the conventional laminated rubber seismic isolation device.

The ability to reduce the seismic force acting on a building is determined by the deformation resistance of the seismic isolation device when the building is horizontally displaced relative to the foundation. The smaller the deformation resistance, the smaller the seismic force acting on the building. In an ideal seismic isolation system with zero deformation resistance, the horizontal seismic force acting on the building is zero regardless of any earthquake motion.

When the vibration damping device is not installed, the deformation resistance of the seismic isolation device increases as the horizontal spring constant of the laminated rubber used increases. Also, when comparing the seismic isolation device with the vibration damping device and the seismic isolation device without the vibration damping device, if the horizontal spring constant of the laminated rubber used is the same, the seismic isolation device with the vibration damping device installed is Deformation resistance is larger than that of a seismic isolation device without a vibration damping device.

Since the seismic isolation apparatus of the present invention has the later-described restoration promoting mechanism, it is possible to use a laminated rubber building support device having a smaller horizontal spring constant than the laminated rubber of the conventional seismic isolation apparatus. Further, the seismic isolation device of the present invention does not require a vibration damping device, whereas the conventional seismic isolation device requires a vibration damping device. Therefore, the horizontal spring constant of the laminated rubber building support device is small and the seismic isolation device of the present invention does not have a vibration damping device, as compared with the conventional seismic isolation device having a large horizontal spring constant of laminated rubber and a vibration damping device. Has a small deformation resistance.

On the other hand, the seismic isolation device can reduce the seismic force acting on the structure only in the range where the vibration period of the seismic motion is smaller than the natural period of the seismic isolation device. Therefore, the larger the natural period of the seismic isolation device is, The range in which the seismic isolation device can exert its seismic isolation capability becomes wider. An ideal seismic isolation device with infinite natural period and zero deformation resistance has seismic isolation capability for earthquake motions with any vibration period. The natural period of the seismic isolation device is determined by its deformation resistance, and the seismic isolation device with smaller deformation resistance has a larger natural period. Therefore, the seismic isolation device of the present invention having a small deformation resistance has a larger natural period than the conventional seismic isolation device having a large deformation resistance.

When the earthquake subsides, the building can be reliably returned to its original position.

Convex body (33) of laminated body control cylinder device (25) of the present invention
It cannot descend unless the seismic isolation device is activated, but it can always rise when downward force ceases. Therefore, the laminated rubber building support device (3)
Even when the building (1) cannot be completely returned to its original position by the restoring force of (3) ..., the laminated body control cylinder device (25) gradually reacts with the slight vibration to move the building (1). Return to original position.

In the conventional laminated rubber seismic isolation device without this restoration promotion mechanism,
Unless you increase the horizontal spring constant of the seismic isolation device considerably,
It is difficult to reliably return a building to its original position.

The structure will not be shaken when an external force other than an earthquake such as wind pressure is applied.

In the case of a conventional laminated rubber seismic isolation device that does not have an actuating device, the building may be shaken due to resonance of vibration other than an earthquake, such as vibration due to wind pressure, mechanical vibration, or vibration due to a passing vehicle. Although the shaking does not damage the building or the equipment in the room, it is not preferable that the building vibrates even with a slight vibration in consideration of habitability.

Since the convex body (33) and the concave body (34) of the laminated body control cylinder device (25) are always engaged with each other in the seismic isolation device of the present invention, the building may be shaken by vibrations other than an earthquake. Absent.

From the above, it is clear that the seismic isolation device of the present invention is closer to an ideal seismic isolation device and has an excellent seismic isolation capability as compared with the conventional laminated rubber seismic isolation device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line BB of the embodiment of the present invention (the cutting point is shown in FIG. 2). FIG. 2 is a vertical sectional view taken along the line AA of the embodiment of the present invention (the cutting point is shown in FIG. 1). FIG. 3 is a front view and a vertical sectional view of a laminated rubber building support device and a laminated rubber restraint device according to an embodiment of the present invention. FIG. 4 is a side view of a laminated rubber building support device and a laminated rubber restraint device according to an embodiment of the present invention. FIG. 5 is a top view and a cross-sectional view of a laminated rubber building support device and a laminated rubber restraint device according to an embodiment of the present invention. 6 and 7 ... Longitudinal sectional views of a laminated body control cylinder device according to an embodiment of the present invention. FIG. 8 is a cross-sectional view taken along the line EE of the laminated body II device of the embodiment of the present invention (the cut portion is shown in FIG. 10). FIG. 9: a vertical cross-sectional view taken along line CC of the laminated body II device of the embodiment of the present invention (the cut portion is shown in FIG. 8). FIG. 10 is a vertical sectional view taken along the line D-D of the laminated body II apparatus of the embodiment of the present invention (the cut portion is shown in FIG. 8). FIG. 11 is an explanatory diagram showing each device of the embodiment of the present invention and the connection relationship of each device. FIG. 12 ... Explanatory drawing showing an operation during long-period seismic isolation vibration according to the embodiment of the present invention. FIG. 13 is an explanatory diagram showing an operation during short-period seismic isolation vibration according to the embodiment of the present invention. (1) ... Building, (2) ... Foundation, (3) ... Laminated rubber building support device, (4) ... Laminated rubber restraint device, (5) ... Vibration control device, (6) ... Rubber, (7) ... steel plate, (8) ... laminated rubber, (9) ... connecting body, (10) ... mounting plate, (11) ... horizontal moving body, (12) ... restraint device, (14) ... flat plate-like body, (15)
… Vertical connecting rod, (17)… Bottom plate, (18)… Vertical cylinder,
(20) ... Piston, (22) ... Vertical cylinder device, (23)
… Convex body, (24)… Concave body, (27)… Vacuum device, (52)
… Laminated body II, (54)… Convex pressure body, (55)… Concave pressure body, (5
6)… Coated rubber, (67)… Metal sheet, (68)… Convex material,
(70) (75) ... Expandable space, (73) ... Concave material, (90) ... Oil transfer pipe F, (93) ... Vacuum tank, (94) ... Vacuum pump.

Claims (13)

[Claims] 1. A plurality of laminated rubber building supporting devices obtained by vertically stacking two laminated rubbers via a connecting body are installed between an upper building and a lower building, and the upper building is arbitrarily set. Is supported so that it can move horizontally in the direction of, and has a piston that moves up and down,
A vertical cylinder device installed in one building and a plate-shaped body mounted facing the piston can be horizontally moved in any direction using multiple flexible vertical connecting rods. The connected horizontal moving body, and the concave surface and the convex surface are overlapped with each other by contacting the convex surface with the concave surface, and one convex surface or the concave surface body, the piston of the vertical cylinder device, the other concave surface or the convex surface body, A plurality of elastic rubber restraint devices each having a sliding pair fixed to the flat plate of the horizontal moving body are installed for each laminated rubber building support device by connecting the flat plate to the connecting body, and a large number of elastic members are installed. Laminated body I and laminated body II formed by stacking thin plates, pressurizing device for applying axial compressive force to the laminated body I and laminated body II, and laminated body
II buckling restraint device, a main cylinder device provided with a large piston that moves up and down and connected to the pressurizing device of the laminated body I and the laminated body II, and a concave body and a convex body with a concave surface in contact with a convex surface Of one or a plurality of units each having a sliding pair in which one convex body or concave body is fixed to the large piston of the main cylinder device and the other concave body or convex body is fixed to the other building. The laminated body control cylinder device is installed in one of the buildings, and the vertical cylinder device of the laminated rubber restraint device, the oil supply pipe connecting the pressurizing device of the laminated body I and the laminated body II, and the hydraulic pressure of each device are held. Microcomputer devices for controlling the hydraulic device, the buckling restraint device, and the laminated body control cylinder device are respectively provided, and by using these vibration control devices, the piston of the vertical cylinder device and the main cylinder device are controlled. The piston is actuated, the natural period variation type laminated rubber seismic isolation apparatus adapted to control the deformation that occurs to each laminated rubber structures supporting device. 2. The natural period according to claim 1, wherein the laminated rubber is a laminated rubber formed by alternately laminating rubber and a hard plate such as a steel plate and joining a mounting plate to each of a top portion and a bottom portion. Flexible laminated rubber seismic isolation device. 3. A structure according to claim 1, wherein one of the structures is a lower structure and the other structure is an upper structure.
The natural period variable laminated rubber seismic isolation device described in the paragraph. 4. A flexible vertical connecting rod has a flat body at the upper end,
4. The natural period variable laminated rubber seismic isolation device according to claim 3, which is a vertical connecting rod whose lower end is connected to a lower structure through universal joints. 5. One of the claims 1 to 4 wherein one convex body or concave body is one convex body and the other concave body or convex body is the other concave body. The natural period variation type laminated rubber seismic isolation device described in. 6. A concave body having a conical concave surface, and a convex body having a conical convex surface.
The natural period variation type laminated rubber seismic isolation device according to one of the items selected from [5]. 7. A laminated body I and a laminated body comprising a laminated body I and a laminated body II, wherein a plurality of elastic thin plates curved in a cylindrical shell shape are superposed on each other, and a pressurizing surface perpendicular to the cylindrical axis is formed on each of the small edges. The natural period variation type laminated rubber seismic isolation device according to one of claims 1 to 6 which is the body II. 8. The natural period variation type laminated rubber seismic isolation device according to claim 1, wherein the elastic thin plate is a metal thin plate. 9. A buckling restraint device, wherein a convex pressing body having a convex cylindrical surface having a curvature larger than that of the concave plate surface is mounted on the concave plate surface side of the laminate II, and the convex plate surface side is mounted on the convex plate surface side. A concave pressure body having a concave cylindrical surface with a larger curvature is attached, and a force device for moving the convex pressure body and the concave pressure body is provided, so that both plate surfaces of the laminated body II are convex pressure bodies. And a natural pressure variation type laminated rubber seismic isolation device according to claim 7 or 8, which is a buckling restraint device capable of pressurizing with a concave pressurizing body. 10. A convex pressing body is formed by polymerizing a plurality of convex bodies having a convex cylindrical surface having a curvature larger than that of the concave plate surface of the laminated body II so as to expand and contract in the direction of the cylindrical axis of the laminated body II. A concave pressurizing body that covers the plate surface and has a concave cylindrical surface with a curvature larger than that of the convex plate surface of the laminated body II is superposed so that it can expand and contract in the direction of the cylindrical axis of the laminated body II. A vacuum that reduces the atmospheric pressure in the flexible coating by a force applying device that seals the laminated body II and the convex and concave pressing bodies with a flexible coating. The natural period variable laminated rubber seismic isolation device according to claim 9, which is provided with a device. 11. The natural period variable laminated rubber seismic isolation device according to claim 10, wherein the flexible coating is a coated rubber. 12. The vacuum device according to claim 10 or 11, wherein the vacuum device is a vacuum device equipped with a vacuum tank and a vacuum pump.
The natural period variable laminated rubber seismic isolation device described in the paragraph. 13. The natural period variable laminated rubber seismic isolation device according to claim 1, wherein the upper structure is a structure and the lower structure is a foundation.