JPH11270187A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the device small-sized, hold base isolation function for a long term, and improve comfortability, by arranging journal bodies over two sorts to be combined in parallel, and making combination of the journal bodies into a plurality of steps to join together the displacement quantities of the respective steps of the journal bodies. SOLUTION: When earthquake force over a prescribed value is applied, lock of triggers 13 is released, and sliding journal bodies 11a, 11b, 11c and a rolling journal 12 are relatively moved in the horizontal direction. Accordingly, vibration due to earthquake force transmitted from a lower structure 3 to an upper structure 2 is lightened. Sliding journal by the slide journal bodies 11a, 11b, 11c and rolling journal 12 are combined together in parallel, and supporting force is enlarged by the sliding journal bodies 11a, 11b, 11c. The friction coefficient is made small by the rolling journal 12, and hence the shake of the upper structure 2 can be made small. Hereby, base isolation from a large-scaled building to a detached house is appropriately performed, and comfortability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seismic isolation device interposed between an upper structure and a lower structure.

[0002]

2. Description of the Related Art As a seismic isolation structure for reducing seismic force by interposing between an upper structure and a lower structure of a building, for example, an upper structure is supported while being movable with respect to the lower structure. Means for suppressing the response displacement by using a bearing and some damping device together are known.

[0003] As the above-mentioned bearing body, a laminated rubber bearing formed by alternately laminating a plurality of rubber elastic bodies and a plurality of metal plates, or a member having a small friction coefficient such as Teflon, slides on this member. 2. Description of the Related Art Generally, a sliding bearing that enables the upper structure to move in a horizontal direction with a relatively small force, and a rolling bearing that movably supports the upper structure via a rotating body such as a bearing are known. The above-described laminated rubber bearing has a seismic isolation function that extends the cycle of the building to reduce the response acceleration, and can be said to also serve as the above-described seismic isolation means.

A sliding bearing and a rolling bearing can move a supporting object in a horizontal direction with a relatively small force, and as another seismic isolation means, an elastic member such as a spring is used to form the upper structure. The natural frequency of the body is reduced to reduce the earthquake input, the relative displacement between the upper structure and the lower structure due to the earthquake is converted into thermal energy by, for example, acting on a viscous body, and the plastic deformation of the lead plug Generally, displacement is suppressed by absorbing seismic energy.

[0005] In the conventional seismic isolation device, the supporting body has one or more stages, and one type of supporting body is used for each stage.

[0006]

However, in the above-mentioned conventional seismic isolation device, since one type of support is used for each step, there are the following problems. That is,
When a rolling bearing is used as the bearing, there is a problem that the ball is severely damaged and worn, and the seismic isolation function cannot be sufficiently exerted in a relatively short period of time. Furthermore, in this case, a trigger for absorbing the seismic force and holding the initial relative positions of the upper and lower structures and releasing the holding when the seismic force exceeds a predetermined value are provided externally. There was a problem that the seismic device became large.

Further, when a sliding bearing or a laminated rubber bearing is used as the bearing, the coefficient of friction is relatively large at about 0.1. There was a problem of getting worse.

[0008] An object of the present invention is to solve such a problem, and can maintain the seismic isolation function for a long period of time, reduce the size, and improve the livability. It is to provide a seismic isolation device that can be used.

[0009]

SUMMARY OF THE INVENTION The present invention is a seismic isolation device, and is configured as follows to solve the above-mentioned technical problem. That is, the present invention relates to a seismic isolation device interposed between an upper structure and a lower structure, and
It is characterized in that various types of bearing bodies are arranged in a parallel combination.

[0010] This seismic isolation device can exhibit the characteristics of each bearing body. The combination of the bearings can be a plurality of stages. In this case, the amount of displacement of the bearing body at each stage can be used together.

The bearing body may be a laminated rubber bearing, a sliding bearing,
It can be either a rolling bearing or a spring.
In this case, suitable control can be performed using the characteristics of the support.

[0012] The at least two types of bearing bodies may be a combination of the rolling bearing and the laminated rubber bearing, a combination of the rolling bearing and the sliding bearing, a combination of the rolling bearing, the sliding bearing and the spring, or A combination of the rolling bearing, the laminated rubber, and the sliding bearing can be provided. In this case, the coefficient of friction can be reduced by the rolling bearing, and the supporting load can be increased by the laminated rubber bearing, the sliding bearing, or the spring.

A stopper for limiting the relative displacement between the upper structure and the lower structure can be integrated.
In this case, the falling off of the upper structure can be prevented. Integrating a damper for absorbing seismic force and a trigger mechanism for holding the initial relative position of the upper structure and the lower structure and releasing the holding when the seismic force exceeds a predetermined value Can be. In this case, the size of the device can be reduced.

The sliding bearing may be formed in a mortar shape or a conical shape having a downward slope toward the center. In this case, a restoring force acts when the upper structure moves horizontally. The rolling bearing may be mounted so as to be inclined downward toward the inside of the upper structure. Also in this case, a restoring force acts when the upper structure moves horizontally.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a seismic isolation device according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a structure to which a seismic isolation device 1 according to a first embodiment of the present invention is attached. This seismic isolation device 1
Is, for example, an upper structure 2 constituting a pillar of a building;
It is interposed between the lower structure 3 constituting the lower part of the pillar provided on the foundation of the building, and is provided to isolate the seismic force transmitted from the foundation to the building via the pillar.

In this seismic isolation device 1, rigid sliding bearings 11a, 11b, 11c such as, for example, a metal plate or a resin plate are stacked in, for example, five stages, and each sliding bearing 11a, 11
A rolling bearing 12 and a trigger 13 are arranged between b and 11c. That is, the sliding bearings 11a, 11b, 11c
, A rolling bearing 12 and a trigger 13 are assembled in parallel. As the rolling bearing 12,
For example, bearings can be used. Note that reference numeral 12a in the figure denotes a retainer.

The sliding bearings 11a, 11b and 11c have a large coefficient of friction but can support a large load, and the rolling bearing 12 can have a small coefficient of friction. Body 11a,
By combining the sliding bearings 11b and 11c and the rolling bearings 12 in parallel, even when the weight of the upper structure 2 is large, the upper structure 2 can be supported so as to be movable in the horizontal direction with a relatively small force. become.

The trigger 13 holds the initial relative position between the upper structure 2 and the lower structure 3 when there is no earthquake, and when the seismic force exceeds a predetermined value, the upper structure 2 and the lower structure 3 Is released. The trigger 13 includes a locking portion 15 attached to the lower sliding bearings 11b and 11c so as to protrude via a spring 14, and a locking groove 16 provided in the upper sliding bearings 11a and 11b.
It is composed of A high-viscosity viscous body is sealed in the trigger 13.

The sliding bearings 11a, 11b, 11c are square as shown in FIG. 2, and the rolling bearings 12 are arranged at the four corners of the sliding bearings 11a, 11b, 11c.
3 is arranged at the center. In addition, rolling bearing 1 of all stages
At the center of 2, an elastic tendon 17 is arranged to penetrate as shown in FIG. The lower side of the elastic tensioning member 17 is inserted into a vertical hole 18 containing a viscous body of the lower structure 3, and a compression spring 19, a retaining ring 20, a stopper 17a, and a damper 21 are sequentially inserted into the inserted portion from the top. Installed.

A horizontal cushioning member 22 is provided on the outer peripheral side of the rolling bearing 12, and upper and lower cushioning members 23 are provided above the rolling bearing 12. Sliding bearing bodies 11a, 11
b, 11c, a sealing member 2 for sealing the gap
4 are provided. On the outer peripheral side of each rolling bearing 12,
As shown in FIG. 3, a packing 25 is provided. Further, as one means for imparting a suitable restoring force, the sliding bearings 11a, 11b, 11c are formed in a mortar shape having a small inclination angle or a conical shape having a downward inclination toward the center. Is attached to the inclined surface.

Next, the operation of the seismic isolation device 1 will be described. As shown in FIG. 4, when a seismic force F greater than a predetermined value acts on the seismic isolation device 1, the lock of the trigger 13 is released,
Sliding bearing bodies 11a, 11b, 11c and rolling bearings 12
Moves horizontally relative to each other. Thereby, the vibration transmitted from the lower structure 3 to the upper structure 2 by the seismic force F is reduced.

Also, the sliding bearing bodies 11a, 11b, 11c
And the rolling bearings 12 are combined in parallel, so that the sliding bearing bodies 11a, 11b, 11c
Thus, the supporting force can be increased, and the rolling bearing 12 can reduce the friction coefficient. Accordingly, the swing of the upper structure 2 can be reduced, so that seismic isolation of not only a large-scale building but also a detached house can be suitably performed, and the livability of the detached house can be improved.

Further, as compared with the case where only the rolling bearing is used as in the conventional case, the seismic isolation device 1 has a smaller load applied to the rolling bearing 12, so that the seismic isolation function can be maintained for a long period of time. it can. Furthermore, the sliding bearings 11a, 1
Since the combination of 1b, 11c and the rolling bearing 12 has a plurality of stages, in this case, four stages, the amplitude of each stage can be used together, so that the stroke of the upper structure 2 can be increased as a whole. Can be.

When the horizontal relative displacement between the lower structure 3 and the upper structure 2 reaches a predetermined value, the stopper 17a
Acts to prevent further increase in displacement. As a result, the amplitude of the building exceeds the limit point (relative displacement of the upper structure 2 with respect to the lower structure 3) and the upper structure 2
Can be prevented from dropping from the lower structure 3.

Since the horizontal cushioning member 22 and the upper and lower cushioning members 23 are arranged on the outer peripheral side and the upper side of the rolling bearing 2,
The impact load during an earthquake can be reduced. Further, horizontal resistance is generated by the damper 21 provided below the stopper 17a, and pull-out resistance is generated by the compression spring 19, so that horizontal and vertical vibrations can be reduced. The elastic tendon 17 can be attached from above without being limited to the illustrated method. Alternatively, only the rolling bearing may be used without using the elastic tendon 17.

Since the sliding bearing bodies 11a, 11b, 11c are formed in a mortar shape or a conical shape inclined downward toward the center, they have a restoring force to the initial position, and the relative displacement of the upper structure 2 is reduced. Even if it happens, it will return to its original state. Furthermore,
Since a high-viscosity viscous material is sealed in the trigger 13, it does not recover during the seismic action, but even if a slight relative displacement remains in the upper structure 2 after the end of the earthquake, the trigger 13
Due to the restoring force of the inner spring, it can be gradually restored to the initial position. Other trigger mechanisms or displacement restoring mechanisms may be used, and can be mounted at any position. On the outer peripheral side of the sliding bearing bodies 11a, 11b, 11c,
Since the seal member 24 and the packing 25 for sealing the gaps between the slide bearing bodies 11a, 11b, 11c are provided,
Dust and moisture can be prevented from entering through this gap.

The seismic isolation device 1 includes a rolling bearing 11a,
Since the rolling bearings 11b, 11c, the rolling bearing 12, the trigger 13, and the damper 21 are integrally combined, the size of the apparatus can be reduced.

The retainer 12a of the rolling bearing 12 is connected to the upper sliding bearing 11a, 11b or the lower bearing 11a.
By fixing to either one of b and 11c, it can be used as a horizontal stopper for the sliding support 11b, 11c or 11a, 11b on the opposite side. Further, the rolling bearing 12, the trigger 13, and the damper 21 can be arranged at any positions.

Further, the rolling bearing 12 slides on the bearing 11
Attaching so as to be inclined downward toward the center of a, 11b, 11c can provide a restoring force to the initial position. The planar shape of a bearing such as a sliding bearing, a rolling bearing, or a laminated rubber may be a quadrangle, a circle, or any other shape. Further, it is also possible to adopt a form in which the tension is not applied to each spring in the initial state, and the tension is applied when deformed. In this case, it is possible to follow a larger deformation and also to expect the function of maintaining the shape. This applies to the following springs. FIG. 5 shows a structure to which the seismic isolation device 4 according to the second embodiment of the present invention is attached. In this seismic isolation device 4, for example, rigid bearings 41a, 41b, 41c such as a metal plate and a resin plate are stacked in seven stages. A round hole 42 of an appropriate size is provided at the center of the slide bearing 41b having the second to sixth cross sections, and a cylindrical and elastic protective tube 43 is inserted into the round hole 42. The protective cylinder 43 is filled with a viscous body. As the viscous body, various kinds of substances other than an electrorheological fluid can be used.

A helical spring 44 is inserted in the protective cylinder 43. Further, inside the helical spring 44,
The rolling bearings 45 are arranged in four stages. These rolling bearings 45 are arranged in parallel with the sliding bearings composed of the second to sixth sliding bearing bodies 41b. At the center of the rolling bearing 45, an upper and lower connecting member 53 having elasticity is penetrated, and each rolling bearing 45 is connected to the helical spring 44 by an elastic connecting member 54.

A horizontal viscous damper 47 is disposed above each rolling bearing 45 via upper and lower cushioning members 46. The horizontal viscous damper 47 is connected to the helical spring 44 by a connecting rod 48, and generates a damping force by viscous resistance accompanying horizontal deformation. The lowermost horizontal viscous damper 47 may be supported by a disc spring 47a (or a leaf spring).

Except for the lowermost slide bearing 41c, all the sliding bearings 41a, 41b have a downward projection 4 at their ends.
9 is formed as a stopper. In addition, all the sliding bearings 41b, 41 except for the topmost sliding bearing 41a.
On the upper surface side of c, there is provided a step portion 50 to be engaged with the projection 49. The step portion 50 is provided with a cushioning material 51.

The sliding bearings 41a, 41b, 41c are quadrangular as shown in FIG.
Triggers 55 are arranged at four corners between a, 41b, and 41c. These triggers 55 are respectively arranged in parallel with the sliding and rolling bearings 45 of each stage. The trigger 55 is the trigger 1 of the seismic isolation device 1 of the above-described first embodiment.
3 and the detailed description is omitted.

As described above, the seismic isolation device 4 of the second embodiment
Also, like the seismic isolation device 1 of the first embodiment, the sliding bearing 41
a, 41b, 41c sliding bearing and rolling bearing 45
Are arranged in parallel, so that the supporting force increases and the friction coefficient decreases, so that not only large-scale buildings but also detached houses can be seismically isolated.

Also, since the combination of the sliding bearing and the rolling bearing 45 is a plurality of stages, here, four stages, the amplitude of each stage can be used together, so that the stroke of the upper structure 2 as a whole is Can be increased.

Further, when the horizontal relative displacement between the lower structure 3 and the upper structure 2 reaches a predetermined value, the projection 49 as a stopper is locked to the step 50 so that the displacement does not increase any more. Therefore, it is possible to prevent the upper structure 2 from dropping from the lower structure 3 due to the amplitude of the building exceeding the limit point.

Further, vibration can be attenuated by the horizontal viscous damper 47, the upper structure 2 can be prevented from shaking by a small force such as wind by the trigger 55, and when the earthquake ends, the upper structure 2 can be attenuated. Even if a small relative displacement remains, the initial position can be slowly returned.

The axial force is shared by the sliding bearings 41a, 41b,
41c and the rolling bearing 45 can be borne at an appropriate ratio, and either one can be borne by 100%. Further, the lowermost horizontal viscous damper 47 is connected to the disc spring 47.
When supported by a, the shared axial force of the upper bearing can be controlled to be constant using the constant deformation range in which the reaction force of the disc spring 47a has a constant deformation range. Further, the protection member 43 can be a combination of an elastic protection member and a shape protection member having high deformation followability, and a laminated rubber can also be used. Further, a support body (not shown) such as a laminated rubber is provided around the upper and lower connecting members 53.
Can also be arranged.

When the upper and lower connecting members 53 are made of an elastic body or a viscoelastic body, a restoring force, a damping force, and a pull-out resistance can be obtained. The upper / lower connecting member 53 can be connected to the rolling bearing 45 by a connecting member (not shown), and has a position holding function of being restored to an initial position when a relative displacement occurs. One end of the upper and lower connecting member 53 can be fixed to a spring, a damper, or a stopper like the elastic tension member 17 of the seismic isolation device 1.

In the above embodiment, the stoppers 49 are provided at the ends of the upper sliding bearings 41a and 41b, and the step portions 50 are provided on the lower bearings 41b and 41c. The upper structure 2 is prevented from falling off by being locked to the step portion 50. Instead, as shown in FIG.
A groove 56 is provided in the end face of each of the sliding bearings 41a, 41b, 41c.
Alternatively, an annular stopper 57 having a U-shaped cross section can be fitted therein. The annular stopper 57 is connected to the sliding bearings 41a, 41b, 41c by a spring (not shown) for maintaining the shape. In this case, the shock can be reduced by providing the cushioning materials 58 and 59 on the bottom surface of the groove 56 and the bottom surface of the annular stopper 57.

As shown in FIG. 8, the rolling bearing 60 at the center may be held by a holding member 61, and the holding member 61 may be provided with a stopper 62 for locking the rolling bearing 60. In addition, the code | symbol 63 in a figure is a buffer material, 64 is an elastic protective material, 65 is a shape holding material, and 66 is a connection member. Also,
The positions of the elastic protective material 64, the shape retaining material 65, and the like can be appropriately switched.

FIG. 9 shows a structure to which a seismic isolation device 7 according to a third embodiment of the present invention is attached. This seismic isolation device 7
Has five sliding bearing bodies 71a, 71b, 71c stacked in five stages. As shown in FIG. 10, a rolling bearing 72 such as a bearing is disposed between the sliding bearings 71a, 71b and 71c. And the sliding bearing 71
The sliding bearing and the rolling bearing 72 formed by a, 71b and 71c are arranged in parallel.

As shown in FIG. 9, each of the sliding bearing bodies 71a-71
71e, the first and second stage sliding bearing bodies 71a, 7e
1b, and third and fourth slide bearing bodies 71c, 71d
Are connected by a leaf spring 73 and elastic tension members 74a and 74c. Also, the second and third slide bearings 71
b, 71c, and the fourth and fifth stage sliding bearing bodies 71d,
71e is connected by a leaf spring 73 and elastic tension members 74b and 74d.

In FIG. 10, the elastic tendon 74a connects the sliding bearings 71a and 71b, and the elastic tendon 74b connects the sliding bearings 71b and 71c. Elastic tendon 74a
And 74c can be connected by an elastic material (not shown).

An elastic bearing 75 is arranged between the leaf spring 73 and the sliding bearings 71a to 71e. The elastic bearing member 75 can be arbitrarily selected from, for example, rubber, laminated rubber, a sliding material, a bearing, and the like, and can be combined with each other, and the elastic bearing member 75 may not be used. The same applies to the following embodiments.

As one means for preventing the floating and maintaining the shape, a disc spring 77 is disposed on the upper surface of the four corners of each of the sliding bearings 71a to 71e as shown in FIG.
As shown in FIG. 11, these disc springs 77
8 urges the lower structure 3. Disc spring 7
An elastic supporting body 83 is laid below 7.

The seismic isolation device 7 includes all the sliding bearing bodies 71
The central portions of a to 71e are connected by a leaf spring 73 and an elastic tension member 74. In addition, all the sliding bearing bodies 71a to 71
Since means for urging the four corners of e into the lower structure 3 side with the disc spring 77 and the elastic tension member 78 can also be used, it is possible to prevent each of the sliding bearing bodies 71a to 71e from rising when an earthquake force is applied. it can. Only one of the leaf spring 73 and the disc spring 77 can be used. Further, the elastic tendon 78 may be attached to the upper part through the intermediate disc spring 77, and may be directly attached to any part through the middle disc spring by the auxiliary tendon 78b. It is. Thereby, the spring of the bearing of each stage can be suitably controlled. The sliding bearings 71a to 71e, the leaf spring 73, and the disc spring 77 are connected to each other by a connecting member (not shown), and can retain their shape even after the action of the earthquake, and have a restoring force.

The four corners of the slide bearings 71a to 71e are provided with a disc spring 77 and an elastic tension member 79 as shown in FIG.
a and 79b. One elastic tendon 79a can be attached through multiple steps, and the other elastic tendon 79b can be attached to an adjacent bearing. The disc spring 77 is attached to any position and step position on the cross section. The elastic tension members 79a or 79b are connected by an elastic member (not shown). Also, the disc spring 77
Instead, a leaf spring (not shown) or the like may be used. Further, as shown in FIG.
1h is replaced with a disc spring 77b, 77c and an auxiliary tension member 78c.
May be connected. The auxiliary tension member 78c can also be attached through the intermediate disc spring 77d.

Instead of the disc spring 77, the slide bearings 71a to 71a
FIGS. 14 to 16 show a means for connecting leaf springs 71e in a cross shape. Leaf spring 80a
Is mounted laterally on the upper surface of a sliding bearing 71a as shown in FIG. 14, and a leaf spring 80b fixed in a cross shape to this leaf spring 80a as shown in FIG.
1b is attached to the lower surface in the vertical direction.

Further, as shown in FIG.
Is mounted on the upper surface of the sliding support body 71b in the horizontal direction, and is attached to the leaf spring 80c in a cross shape by a leaf spring 80d.
Is vertically mounted on the lower surface of the sliding bearing 71c below it as shown in FIG.

That is, the cross-shaped leaf springs 80a, 80b
The upper and lower sliding bearing bodies 71a, 71b are connected by
Upper and lower sliding bearing bodies 71b, 71c are connected by cross-shaped leaf springs 80c, 80d. Hereinafter, the slide bearings 71a to 71e are attached in the same manner and connected.
The elastic tendon 81a connects the leaf springs 80a, 80b, but can also be connected to other elastic tendons 81b, 81c, 81d, etc. (not shown).

Thus, the sliding bearing bodies 71a, 71b,
By connecting the four corners of 71c with a lifting prevention mechanism composed of various leaf springs, disc springs, elastic pressure members, and elastic tension members, it is possible to prevent the sliding bearing bodies 71a, 71b, 71c from lifting. . In addition, these leaf springs and disc springs can be used in an appropriate combination, which enables effective control and shape retention. These anti-lifting mechanisms can be combined with bearings and laminated rubber or other bearings. In addition, it is assumed that the bearing can be assembled at any position.

FIG. 17 shows a structure in which the above-described seismic isolation device 1, 4 or 7 according to the present invention is mounted as a seismic isolation device 9. The seismic isolation device 9 includes a beam 90 and a foundation 91 as a substructure.
It is interposed between and. The beam 90 is arranged at a right angle as shown in FIG. 16, and the seismic isolation device 9 is arranged at the corner. A reinforcing member 97 is provided between both beams 90.

The seismic isolation device 9 has a plurality of sliding bearings 92 as shown in FIG.
For example, rolling bearings (not shown) are arranged side by side on the sliding bearing formed by. An L-shaped stopper 93 protrudes from the inner end of the lowermost slide bearing member 92.

Further, a fireproof and dustproof member 94 is attached to the outer surface of the sliding bearing 92 in order to prevent dust and the like from entering through a gap between the sliding bearing 92. At the end of the beam 90, a pillar 95 is provided upright. Beam reinforcing plates 96 are attached to both side surfaces of the beam 90 with joining bolts 98. The beam reinforcing plate 96 is integrally provided with a protruding portion 104 protruding downward. A buffer member 101 is provided at an end of the protrusion 104 at a position corresponding to the stopper 93.

A reinforcing beam 99 is fixed below the beam 90 with an adhesive, and the reinforcing beam 99 is fixed to the projecting portion 104 of the beam reinforcing plate 96 with a joining bolt 100. Furthermore, the basics 91
, A foundation beam 102 located below the reinforcing beam 99 is attached. On the upper surface of the foundation beam 102, a trigger 1
03 is provided, and this trigger 103 is
It is locked to.

The seismic isolation device 9 has a beam 90
When the beam is relatively displaced, the beam reinforcing plate 96 comes into contact with the stopper 93 of the sliding support body 92, so that the beam 90 can be prevented from falling off. In addition, since the beam 90 is reinforced by the beam reinforcing plate 96, the reinforcing beam 99 can be made smaller, thereby suppressing an increase in the height of the building.

Even when the foundation beam 102 has a T-shape or a cross shape, a form using a reinforcing member 97 or the like can be similarly used. Further, in the above-described embodiment, the case where the rolling bearing and the sliding bearing are combined has been described.
The present invention can be used in combination with at least two different types of bearings such as laminated rubber.

[0060]

As described above, according to the seismic isolation device of the present invention, by arranging at least two types of bearings in parallel, the characteristics of each bearing can be exhibited together. Because it is possible, seismic isolation control optimal for the building can be performed.

In the case where the combination of the supports is made up of a plurality of stages, the amount of displacement of the supports at each stage can be used together, so that the stroke of the structure can be increased. When the bearing is one of a laminated rubber bearing, a sliding bearing, a rolling bearing, and a spring, suitable control can be performed by utilizing the characteristics of the bearing.

[0062] At least two types of bearings may be used as a combination of a rolling bearing and a laminated rubber bearing, a combination of a rolling bearing and a sliding bearing, a combination of a rolling bearing, a sliding bearing and rubber, or a rolling bearing and a laminated rubber and sliding. When combined with a bearing, the rolling bearing can reduce the coefficient of friction and the laminated rubber bearing, sliding bearing, or spring can increase the load, so it can be applied not only to large-scale buildings but also to detached houses. it can.

When a stopper for limiting the relative displacement between the upper structure and the lower structure is incorporated integrally, it is possible to easily prevent the upper structure from falling off. When a damper that absorbs seismic force and a trigger mechanism that holds the initial relative position of the upper structure and the lower structure and releases the holding when the seismic force exceeds a predetermined value are integrated,
The device can be downsized.

In the case where the sliding bearing is formed in a mortar shape or a conical shape having a downward slope toward the center, a restoring force acts when the upper structure moves horizontally, so that the upper structure returns to the original position. Even when the rolling bearing is mounted so as to be inclined downward toward the inside of the upper structure, the restoring force acts when the upper structure moves horizontally, thereby returning to the original position.

[Brief description of the drawings]

FIG. 1 is a diagram showing a seismic isolation device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view showing another example of the rolling bearing of the seismic isolation device of the first embodiment according to the present invention.

FIG. 4 is a diagram illustrating the operation of the seismic isolation device according to the first embodiment of the present invention.

FIG. 5 is a view showing a seismic isolation device according to a second embodiment of the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a cross-sectional view showing another example of the stopper of the seismic isolation device of the second embodiment according to the present invention.

FIG. 8 is a sectional view showing another example of the rolling bearing of the seismic isolation device of the second embodiment according to the present invention.

FIG. 9 is a diagram showing a seismic isolation device according to a third embodiment of the present invention.

FIG. 10 is a sectional view taken along the line CC in FIG. 9;

FIG. 11 is a sectional view taken along line DD of FIG. 10;

FIG. 12 is a cross-sectional view showing another example of the lifting prevention mechanism of the seismic isolation device according to the third embodiment of the present invention.

FIG. 13 is a cross-sectional view showing another example of the lifting prevention mechanism of the seismic isolation device according to the third embodiment of the present invention.

FIG. 14 is a cross-sectional view showing another example of the lifting prevention mechanism of the seismic isolation device according to the third embodiment of the present invention.

FIG. 15 is a sectional view taken along line EE of FIG. 14;

FIG. 16 is a sectional view taken along line FF of FIG. 14;

FIG. 17 is a view showing a seismic isolation device according to a fourth embodiment of the present invention.

18 is a view as viewed in the direction of the arrow G in FIG. 17;

[Explanation of symbols]

1, 4, 7, 9 Seismic isolation device 2 Upper structure 3, 91 Lower structure 11a to 11c, 41a to 41c, 71a to 71e, 9
2 Sliding bearing body 12 Rolling bearing 13, 52, 55, 103 Trigger 17a, 49, 57, 62, 93 Stopper 21, 47 Damper 73 Leaf spring 77 Disc spring

Claims (9)

[Claims] 1. A seismic isolation device interposed between an upper structure and a lower structure, wherein at least two types of bearing bodies are arranged in a parallel combination. 2. The seismic isolation device according to claim 1, wherein the support members are combined in a plurality of stages. 3. The seismic isolation device according to claim 1, wherein the bearing is one of a laminated rubber bearing, a sliding bearing, a rolling bearing, and a spring. 4. A combination of the rolling bearing and the laminated rubber bearing, a combination of the rolling bearing and the sliding bearing, a combination of the rolling bearing, the sliding bearing and the spring. The seismic isolation device according to claim 3, wherein the rolling bearing, the laminated rubber, and the sliding bearing are combined. 5. The seismic isolation device according to claim 1, wherein a stopper for limiting a relative displacement amount between the upper structure and the lower structure is incorporated integrally. 6. A damper for absorbing seismic force, and a trigger mechanism for holding an initial relative position between the upper structure and the lower structure and releasing the holding when the seismic force exceeds a predetermined value. The seismic isolation device according to any one of claims 1 to 5, wherein the seismic isolation device is integrally incorporated. 7. The seismic isolation device according to claim 3, wherein the sliding bearing has a mortar shape or a conical shape that is inclined downward toward the center. 8. The seismic isolation device according to claim 3, wherein the rolling bearing is attached so as to be inclined downward toward the inside of the upper structure. 9. The spring according to claim 1, wherein the spring has an initial tension in order to obtain a restoring force and maintain a shape, or a spring having no initial tension and acting after a certain deformation. The seismic isolation device according to any one of 3 to 8.