JP2001082542A - Three-dimensional base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional base isolation device to provide an excellent base isolation function in a three-dimensional direction by a method wherein a horizontal base isolation device to perform exclusive horizontal base isolation and a vertical base isolation device to perform exclusive vertical base isolation are juxtaposed with each other, and the whole weight of a building is burdened on the vertical base isolation device so that the weight of the building is not exerted on the horizontal base isolation device and this operation sufficiently ensures the vertical base isolation function of the vertical base isolation device as an original horizontal base isolation function by the horizontal base isolation device is sufficiently ensured. SOLUTION: A horizontal base isolation device 16 to perform horizontal base isolation between two structures and a vertical base isolation device 18 to perform vertical base isolation between the two structures are situated in juxtaposition between a support structure 12 and a base isolation structure 14 situated above the support structure with a distance provided therebetween. A transmission means 20 to allow relative movement in a vertical direction of the base isolation structure and transmit relative movement in a horizontal direction to the horizontal base isolation device is situated between the horizontal base isolation device and the base isolation structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional seismic isolation device having horizontal and vertical seismic isolation functions.

[0002]

2. Description of the Related Art Important facilities such as nuclear power plants are constructed as buildings that minimize the effects of earthquakes and the like. It is desirable to adopt a seismic isolation structure that enables the construction of a standardized plant that aims to reduce costs through standardization.

[0003] Generally, a building such as a building is subjected to a horizontal seismic isolation structure using laminated rubber or the like. The building can be efficiently protected from the above, and the building can be standardized by applying it to the above-mentioned important facilities.

As this kind of three-dimensional seismic isolation device, for example, one disclosed in Japanese Patent Application Laid-Open No. Hei 8-218678 has been proposed. This three-dimensional seismic isolation device is constructed by adding a vertical seismic isolation mechanism to the lower or upper part of a horizontal seismic isolation device such as laminated rubber, that is, a horizontal seismic isolation device and a vertical seismic isolation mechanism are vertically arranged in series. The weight of the building is input to the horizontal seismic isolation device and the vertical seismic isolation mechanism.

[0005]

However, in such a conventional three-dimensional seismic isolation device, in order to prevent the building from resonating with the vertical vibration at the time of the earthquake input, the vertical direction on the building side is required. It is desirable to make the natural frequency of the laser beam longer. In other words, because the dominant period of vertical vibration input by an earthquake is within 0.5 seconds or less, the vertical vibration period on the building side determined by the vertical seismic isolation mechanism is set to 0.5 seconds or more. There is a need to. In order to prolong the period of the building, it is necessary to appropriately set the spring stiffness of the vertical seismic isolation mechanism.

In addition, the vertical seismic isolation mechanism is required to be able to reliably support the weight of the building and to prevent rocking vibration of the building. If the setting of the spring rigidity of the vertical seismic isolation mechanism is improper, the vertical vibration cycle of the building may be shifted from the seismic isolation region in the short period direction, and the vertical seismic isolation may not be performed effectively. Then, if it deviates from the seismic isolation region, the vertical vibration of the building increases, and the pulling force acts on the building greatly, and the horizontal seismic isolation device made of laminated rubber or the like is damaged. There is also a risk.

Further, when the spring rigidity of the vertical seismic isolation mechanism is increased to support the load of the building, the vertical fluctuation load caused by the spring rigidity of the vertical seismic isolation mechanism is reduced by the vertical seismic isolation device. Significantly affects performance. For example, when the vertical seismic isolation mechanism is provided in series on a horizontal seismic isolation device as disclosed in JP-A-8-218678, a shear force is generated in the laminated rubber due to the horizontal force. The shear resistance fluctuates greatly due to a large vertical fluctuation load. In other words, the vertical seismic isolation performance of the horizontal seismic isolation device itself is affected by the vertical fluctuation load caused by the large spring rigidity of the vertical seismic isolation mechanism on the horizontal seismic isolation performance that should be originally achieved by the horizontal spring rigidity of the horizontal seismic isolation device itself. It is difficult to design with the desired performance.

For the above reasons, it cannot be said that the conventional three-dimensional seismic isolation device can properly and sufficiently exhibit the horizontal and vertical three-dimensional seismic isolation functions. Achieving the standardization of a building by applying the method has a problem that it is extremely difficult.

Therefore, the present invention has been made in view of such a conventional problem, and a horizontal seismic isolation device that exclusively performs horizontal seismic isolation and a vertical seismic isolation device that exclusively performs vertical seismic isolation are provided side by side. The weight of the building does not act on the horizontal seismic isolation device, and the entire weight of the building is borne by the vertical seismic isolation device.
In this way, the original horizontal seismic isolation device provided by the horizontal seismic isolation device is fully secured, and the vertical seismic isolation device is also fully secured in the vertical seismic isolation function, so that the superior seismic isolation function in the three-dimensional direction can be exhibited. An object is to provide a three-dimensional seismic isolation device that can be used.

[0010]

In order to achieve the above object, a three-dimensional seismic isolator according to the present invention comprises a supporting structure and a seismic isolating structure disposed at a distance above the supporting structure. In the meantime, a horizontal seismic isolation device that horizontally isolates these two structures,
An upper and lower seismic isolation device that vertically isolates the two structures is arranged in parallel, and a vertical seismic isolation structure is provided between the horizontal seismic isolation device and at least one of the support structure and the seismic isolation structure. A transmission means for allowing relative movement in the direction and transmitting the relative movement in the horizontal direction to the horizontal seismic isolation device is interposed.

According to this structure, the horizontal seismic isolation device and the vertical seismic isolation device are arranged in parallel, and the seismic isolation structure is provided between the horizontal seismic isolation device and at least one of the support structure and the seismic isolation structure. The vertical relative movement of the vertical direction is allowed and the transmission means for transmitting the horizontal relative movement to the horizontal seismic isolation device is provided, so that the weight of the seismically isolated structure acting in the vertical direction is supported only by the vertical seismic isolation device, The weight of the seismic isolation structure is not applied to the seismic device. As a result, only the horizontal relative movement between the seismic isolation structure and the supporting structure is transmitted to the horizontal seismic isolation device via the transmission means, and the horizontal seismic isolation device can stably provide the original horizontal seismic isolation function. Can be demonstrated.

[0012] Also, regarding the vertical fluctuation load during an earthquake,
This does not act on the horizontal seismic isolation device by the transmission means,
In order to operate only on the vertical seismic isolation device, the spring rigidity of the vertical seismic isolation device is appropriately set without considering the horizontal seismic isolation device, so that the vertical It is possible to extend the period, and to exert sufficient vertical seismic isolation function. In addition, the vertical seismic isolation device can also suppress rocking vibration of the seismic isolation structure due to its rigidity.

Therefore, the horizontal seismic isolation function provided by the horizontal seismic isolation device is properly and sufficiently secured, and the vertical seismic isolation function provided by the vertical seismic isolation device is also adequately and sufficiently secured to provide an excellent three-dimensional seismic isolation function. Thus, by applying this to a building, it is possible to obtain a three-dimensional seismic isolation device that can achieve standardization of the building and site-free.

It is preferable that a sliding mechanism is provided between the vertical seismic isolation device and at least one of the support structure and the seismic isolation structure to allow relative movement of the two in the horizontal direction.

According to this configuration, the horizontal mechanism between the supporting structure and the seismic isolation structure is prevented from being input to the vertical seismic isolation device by the sliding mechanism. Can be reduced to affect the seismic isolation performance of the horizontal seismic isolation device. In addition, by appropriately setting the friction resistance value when the sliding mechanism slides, the friction resistance can function as a damping element for horizontal vibration.

Further, it is preferable that the sliding mechanism is a rolling bearing or a sliding bearing. According to this configuration,
Rolling or sliding bearings significantly reduce the input of horizontal vibration between the supporting structure and the seismic isolation structure to the vertical seismic isolation device, and the spring rigidity of the vertical seismic isolation device affects the horizontal seismic isolation device Since the horizontal seismic isolation device can be substantially eliminated, the horizontal seismic isolation device can exhibit a preset horizontal seismic isolation function,
The design of the horizontal seismic isolation device is facilitated.

Further, it is desirable that the horizontal seismic isolation device is made of, for example, a laminated rubber having a horizontal isotropic restoration performance. According to this configuration, an appropriate horizontal seismic isolation function can be exhibited in any direction in the horizontal plane.

Further, it is desirable that the above-mentioned vertical seismic isolation device is a laminated body of disc springs. According to this configuration, the conical portion of the disc spring is expanded and contracted by the input of the vertical vibration, and the conical portions are rubbed against each other by the expanded and contracted deformation, so that the rigidity and damping due to the friction effect at this time are achieved. The effect can be obtained.

Further, an energy absorbing device can be added to the above-mentioned vertical seismic isolation device. According to this configuration, the energy absorbing device operates in response to the input of the vertical vibration, thereby absorbing the vertical vibration energy.

Still further, the transmission means is provided between the horizontal seismic isolation device and at least one of the support structure and the seismic isolation structure, and is engaged with each other in a horizontal direction and is opposed in a vertical direction. It is desirable to use a pair of movable engagement members.

The pair of engaging members can move relative to each other in the vertical direction, and the weight of the seismic isolation structure and the vertical movement thereof have no effect between the engaging members. Therefore, the horizontal relative movement can be transmitted between the seismic isolation structure and the support structure to activate the horizontal seismic isolation device. Further, since the horizontal engagement and the vertical movement can be ensured, the configuration of the engagement member is extremely simple.

[0022]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIG. 1, the three-dimensional seismic isolation device 10 according to the present embodiment basically includes a support structure 12 and a seismic isolation structure 14 that is disposed above the support structure 12 with a space therebetween. Between these two structures 12, 1
A horizontal seismic isolation device 16 for horizontal seismic isolation between four spaces, and both structures 1
A vertical seismic isolation device 18 that vertically isolates the space between 2 and 14 is arranged in parallel. The transmission unit 20 is configured to transmit the relative movement in the horizontal direction to the horizontal seismic isolation device 16.

FIGS. 2 to 5 show a concrete embodiment of the three-dimensional seismic isolation device 10 of the present invention. FIG. 2 is a front view of the three-dimensional seismic isolation device, FIG. 3 is a front view of a part of the vertical seismic isolation device, FIG.
FIG. 4 is a spring characteristic diagram of the vertical seismic isolation device.

That is, the three-dimensional seismic isolation device 10 of the present embodiment
Is interposed between the support structure 12 and the seismic isolation structure 14, and the three-dimensional seismic isolation device 10, specifically, the vertical seismic isolation device 1
8 supports the vertical load of the seismic isolation structure 14. The three-dimensional seismic isolation device 10 includes a horizontal seismic isolation device 1.
6, a vertical seismic isolation device 18 arranged in parallel with this, and a transmission means 20 arranged between the horizontal seismic isolation device 16 and the seismic isolation structure 14 above it. The horizontal seismic isolation device 16, the vertical seismic isolation device 18, and the transmission means 20 form one unit as shown in FIG. It has become. On the other hand, in the case of a parallel arrangement, it is not always necessary to unitize, and the number does not need to be the same.

The horizontal seismic isolation device 16 is composed of a laminated rubber 22 in which rubber layers and steel plates are alternately laminated. The laminated rubber 22 has a lower flange 22a and an upper flange 22b.
Are provided. At the installation site of the laminated rubber 22, a reinforced concrete installation base 2 having a predetermined height from the support structure 12 is provided.
4 is protruded, and the lower flange 22 a
Is fixed, and the laminated rubber 22 is installed. Laminated rubber 22
Has isotropic recovery performance and damping performance in the horizontal direction, and exhibits accurate seismic isolation performance in all directions in the horizontal direction.

As shown in FIG. 2, the transmission means 20 includes a cylindrical body 32 erected on the upper flange 22b of the laminated rubber 22, and an upper mounting plate 3 fixed to the seismic isolation structure 14.
4 and a shaft 32a which is slidably inserted into the cylinder 32 in the up-down direction and engages with the cylinder 32 in the horizontal direction. These cylindrical body 32 and shaft body 3
As for 2a, in the illustrated example, the cylindrical body 32 is provided on the upper flange 22b and the shaft body 32a is provided on the upper mounting plate 34, but these arrangement relations may be reversed.

It is preferable that a slight gap be provided between the outer peripheral surface of the shaft body 32a and the inner peripheral surface of the cylindrical body 32 which face each other. If the outer peripheral surface and the inner peripheral surface are always in sliding contact with each other, when a relative movement in the vertical direction occurs between the seismic isolation structure 14 and the support structure 12, a frictional force is generated between the two, and the frictional force is generated. This is because the directional force may act on the horizontal seismic isolation device 16. On the other hand, if the gap between the outer peripheral surface and the inner peripheral surface is too large, when the horizontal relative movement occurs between the seismic isolation structure 14 and the support structure 12, the horizontal seismic isolation device 16 or the seismic isolation structure This is because a shocking force acts on 14.

Further, a shaft body 32a vertically opposed to the shaft body 32a
A gap larger than a gap δ1 to be described later is set between the lower end of the rubber member 22 and the upper flange 22b of the laminated rubber 22, and the shaft 32a is moved upward by the relative movement of the seismic isolation structure 14 and the support structure 12 in the vertical direction. It does not interfere with the flange 22b. The cross-sectional shape of the cylindrical body 32 and the shaft body 32a is such that the vertical slide and the horizontal engagement are maintained.
Any cross section such as a circle may be used. The shaft 32a and the cylinder 32 constitute a pair of engagement members.

On the other hand, as shown in FIG. 3, the vertical seismic isolation device 18 is constituted by using a disc spring laminated body 26 in which disc springs 26a are laminated. Here, regarding the method of stacking the disc springs 26a, when they are stacked in the same direction, they are in parallel, and when they are stacked in the opposite direction, they are in series. The disc spring laminate 26 is formed by laminating a plurality of parallel disc springs 26a alternately in series in the opposite direction. In the present embodiment, one set or a plurality of sets as shown in FIG. A spring laminate 26 is arranged. And the lower side of these four sets of disc spring laminates 26
It is mounted on a rolling bearing 28 or a sliding bearing as a sliding mechanism mounted on the support structure 12. The upper side of the disc spring laminate 26 is attached to an upper attachment plate 30 fixed to the seismic isolation structure 14.

The rolling bearing 28 of the vertical seismic isolation device 18
Is a supporting leg 28a having a flat lower surface as shown in FIG.
And an outer shell 28b that covers the peripheral edge of the support leg 28a with an appropriate gap, and a number of small balls 28c housed in a space between the support leg 28a and the outer shell 28b. You. The support leg 28a is placed on a slide board 36 laid on the upper surface of the support structure 12 with the small ball 28c interposed therebetween, and the interposed small ball 28c rolls, whereby the rolling bearing is formed. 28 and the support structure 12 are slidable with extremely small sliding resistance.

As is generally known, the disc spring 26a constituting the disc spring laminated body 26 has a donut shape having an opening at the center, and its peripheral edge forms a gentle weight. It is formed in a hat-shape with an open center. And, the disc spring 2 constituting each disc spring laminate 26
The upper mounting plate 3a has a central opening as shown in FIG.
It is fitted to the outer periphery of the cylindrical pole 38 vertically installed from zero. The lower end of the cylindrical pole 38 is connected to the rolling support 28.
A predetermined gap .delta.1 is provided between the support leg 28a and the upper surface of the support leg 28a, and a slide hole 38a is formed in the inner periphery of the lower end portion with a slightly enlarged diameter.

On the other hand, the support legs 28 of the rolling bearing 28
A dowel pin 40 protrudes from the upper surface at a position facing the cylindrical pole 38, and the dowel pin 40 is slidably fitted into the sliding hole 38a. The amount of engagement between the dowel pin 40 and the sliding hole 38a and the gap δ1 are determined according to the amount of vertical relative displacement between the support structure 12 and the seismic isolation structure 14 which is assumed in advance by the input vertical vibration. It is determined. An air vent hole (not shown) is formed in the sliding hole 38a where the dowel pin 40 slides.

By the way, as shown in the load-displacement curve of FIG. 5, the spring characteristics of the vertical seismic isolation device 18 increase the rise of the load with respect to the displacement with respect to the input load. When the load decreases, the friction between the disc springs 26a is dominant initially, and the displacement does not recover with the decrease in the load, but thereafter, the characteristic returns to the initial length according to the decrease in the load.

With the above configuration, in the three-dimensional seismic isolation device 10 of the present embodiment, the horizontal seismic isolation device 16 and the vertical seismic isolation device 18 are arranged in parallel between the support structure 12 and the seismic isolation structure 14. Thus, when vibrations due to an earthquake are input, the horizontal vibration energy is absorbed by the horizontal seismic isolation device 16 and horizontal seismic isolation is performed, and the vertical vibration energy is absorbed by the vertical seismic isolation device 18 and vertically seismically isolated. Three-dimensional seismic isolation with horizontal and vertical seismic isolation. Further, the transmission means 20 disposed above the horizontal seismic isolation device 16 has a function of preventing axial force fluctuation caused by vertical vibration from acting on the horizontal seismic isolation device 16.

By the way, the horizontal seismic isolation device 16 and the vertical seismic isolation device 18 are arranged in parallel, and the vertical relative movement of the seismic isolation structure 14 is allowed while the horizontal relative movement is
Is provided, the weight W of the seismic isolation structure 14 acting in the vertical direction is supported only by the vertical seismic isolation device 18, and the weight of the seismic isolation structure 14 is W can be prevented from acting. As described above, since the vertical load borne by the horizontal seismic isolation device 16 is eliminated,
The surface pressure dependency of the rubber layer of the laminated rubber 22 can be reduced, and the instability of the rubber properties during horizontal seismic isolation can be eliminated, and stable performance can be obtained. And horizontal seismic isolation device 1
6, only the relative movement in the horizontal direction between the seismic isolation structure 14 and the support structure 12 is transmitted via the transmission means 20, so that the laminated rubber 22 as the horizontal seismic isolation device 16 is stably and sufficiently horizontal. It can exhibit seismic isolation function. So also
The design of the horizontal seismic isolation device 16 also becomes easy.

In addition, since the vertical load does not act on the horizontal seismic isolation device 16 in this manner, the total number of the horizontal seismic isolation devices 16 disposed below the seismic isolation structure 14 can be reduced. The reduction makes it easier to secure a longer period for horizontal seismic isolation, and can also reduce costs.

Further, the vertically fluctuating load at the time of the earthquake can be borne only by the vertical seismic isolation device 18 by the transmission means 20, and the spring stiffness can be set arbitrarily to support the vertical seismic isolation device 18. Tuning of the seismic isolation structure 14 to an optimum long period in the vertical direction (for example, 0.5 seconds or more) can be facilitated, and a wide adjustment range of the support load can be secured.

In particular, in the present embodiment, since the rolling bearing 28 is provided below the upper and lower seismic isolation device 18 to enable free horizontal sliding, the support structure 12 and the seismic isolation structure 14 The input of horizontal vibrations between the upper and lower seismic isolation devices 18 is greatly reduced by the rolling bearings 28,
The influence of the spring rigidity of the vertical seismic isolation device 18 on the horizontal seismic isolation device 16 can be reduced as much as possible. From this point, the horizontal seismic isolation device 16 can exhibit a preset horizontal seismic isolation function, and the design of the horizontal seismic isolation device 16 is facilitated.
The frictional resistance when the rolling bearing 28 or the sliding bearing slides can also function as a damping element for horizontal vibration.

Further, in the three-dimensional seismic isolation device 10 of the present embodiment, the spring stiffness of the vertical seismic isolation device 18 can be appropriately set independently without having to consider the characteristics of the horizontal seismic isolation device 16 and the like. Since the entire seismic isolation structure 14 can be supported by the upper and lower seismic isolation devices 18 of a suitable setting, rocking vibration can be effectively suppressed.

Further, the vertical seismic isolation device 18 is composed of a disc spring laminated body 26. The weight of the disc spring 26a constituting the disc spring laminated body 26 is expanded and contracted by the input of vertical vibration. Disc springs 26a stacked together by deformation
Since they rub against each other, rigidity and damping effect against vertical vibration can be obtained by the friction effect at this time.
In addition, as shown by a virtual line in FIG. 2, by separately providing an energy absorbing device such as a hydraulic damper 50 between the upper mounting plate 30 of the vertical seismic isolation device 18 and the rolling bearing 28,
Since the hydraulic damper 50 operates to absorb the vibration energy by the input of the vertical vibration, the required damping can be ensured by this configuration, and the setting of the amount of attenuation as the vertical seismic isolation device 18 becomes easy.

Further, the transmission means 20 is connected to the cylindrical body 32 and the shaft body 32.
a, the horizontal engagement and the vertical relative movement can be appropriately ensured by these components, and the structure is simple and the reliability is high.

Accordingly, the three-dimensional seismic isolation device 10 of the present embodiment
Therefore, while securing the horizontal seismic isolation function of the horizontal seismic isolation device 16, the vertical seismic isolation device 18 can also sufficiently secure the vertical seismic isolation function, so that an excellent three-dimensional seismic isolation function can be exhibited. . For this reason, by applying the three-dimensional seismic isolation device 10 to structures of important facilities such as a nuclear power plant where safety during an earthquake is strongly required, standardization of the structures of the important facilities, that is, It is possible to achieve standardization of plant equipment, for example, building frames, pipes, supports, and the like. In addition, it is possible to increase the location conditions by making site-free of important facilities possible, and on the other hand, it is also possible to reduce the construction cost of facility structures.

In the present embodiment, the horizontal seismic isolation device 16 is formed of the laminated rubber 22. However, the present invention is not limited to this, and any elastic member capable of effectively achieving horizontal seismic isolation can be used. Although the disc spring laminate 26 is used, another elastic member suitable for the function can be used in place of the disc spring laminate 26. Furthermore, although the rolling bearing 28 is used as the sliding mechanism, it is needless to say that the present invention is not limited to this, and a structure allowing smooth relative movement, such as a sliding bearing or a linear rail, can be used.

FIG. 6 shows another embodiment of the present invention. As shown in the figure, in this embodiment, the vertical seismic isolation device 18 has the same configuration as the above-described embodiment, and the horizontal seismic isolation device 16 has a different configuration. A pair of walls 60 are erected on the support structure 12 so as to face each other at a considerable distance in the horizontal direction, and the seismic isolation structure 14 is hung between the pair of walls 60. A hanging part 62 is provided. A pair of elastic springs 64 and a damping device 65 that extend horizontally and extend and contract horizontally are provided between the lower ends of these hanging portions 62 and the upper ends of the wall portions 60 that face each other in the horizontal direction. The horizontal seismic isolation device 16 is constituted by the elastic spring 64 and the damping device 65. As the damping device 65, various devices such as a hysteresis type or a viscoelastic type can be used. These elastic springs 6
4 and both ends of the damping device 65 are rotatably attached to the wall portion 60 and the hanging portion 62 via a pin joint 66. Further, between the wall portion 60 and the seismic isolation structure 14, and between the hanging portion 62 and the support structure 12, the vertical relative displacement of the seismic isolation structure 14 and the support structure 12 is allowed to allow mutual displacement. A considerable vertical gap is set to prevent interference.

Therefore, in this embodiment, the structures 12,
When the horizontal relative movement occurs between the fourteen members 14, the wall portion 60 and the hanging portion 62 relatively move in the horizontal direction, whereby the elastic spring 64 and the damping device 65 are expanded and contracted, and the horizontal seismic isolation operation is performed. Is to be demonstrated. On the other hand, when the vertical relative movement occurs, the vertical seismic isolation device 18 is operated in the same manner as in the above embodiment. At this time, the wall 60
And the hanging part 62 relatively move in the vertical direction.
Since the elastic spring 64 and the damping device 65 are connected to the wall portion 60 and the hanging portion 62 via the pin joint 66, the elastic spring 64 and the damping device 65 are slightly expanded and contracted by the relative movement between the wall portion 60 and the hanging portion 62. Is small and has almost no effect on the vertical seismic isolation device 18. Thereby, even in the present embodiment, it is possible to obtain substantially the same operation and effect as in the above embodiment.

In particular, in the present embodiment, the transmission means 20 which permits the vertical relative movement of the seismic isolation structure 14 and transmits the horizontal relative movement to the horizontal seismic isolation device 16 includes a pair of wall portions 60.
And the hanging part 62. In the illustrated example, the hanging part 62 and the wall part 60 are attached to the supporting structure 12 and the hanging part 6 to the seismic isolation structure 14.
Although two are provided, these arrangements may be reversed.

[0047]

As described above, in the three-dimensional seismic isolation device according to the first aspect of the present invention, the weight of the seismic isolation structure acting in the vertical direction is supported only by the vertical seismic isolation device, The weight of the seismic isolation structure does not act on the seismic isolation device, and the horizontal seismic isolation device can transmit only the horizontal relative movement between the seismic isolation structure and the support structure via the transmission means. As a result, the original horizontal seismic isolation function can be stably and sufficiently exerted by the horizontal seismic isolation device.

Also, regarding the vertical fluctuation load at the time of an earthquake,
This does not act on the horizontal seismic isolation device by the transmission means,
Since it acts only on the vertical seismic isolation device, the spring stiffness of the vertical seismic isolation device can be appropriately set without considering the horizontal seismic isolation device, and the vertical direction of the seismic isolation structure supported by the vertical seismic isolation device It is possible to extend the period, and to exert a sufficient vertical seismic isolation function. In addition, the vertical seismic isolation device can also suppress rocking vibration of the seismic isolation structure due to its rigidity.

Further, by setting the spring stiffness of the horizontal seismic isolation device, it is possible to easily set a longer period, to simplify the arrangement layout of the device, and to reduce the cost.

Therefore, the horizontal seismic isolation device provided by the horizontal seismic isolation device is adequately and sufficiently secured, and the vertical seismic isolation device provided by the vertical seismic isolation device is also adequately and sufficiently secured to provide a superior three-dimensional seismic isolation device. Seismic performance can be exhibited, and by applying this to buildings, it is possible to achieve standardization of buildings and site-free.

Further, in the three-dimensional seismic isolator according to the second aspect of the present invention, relative movement is allowed between the vertical seismic isolator and at least one of the support structure and the seismic isolation structure. Since the sliding mechanism is interposed, input of horizontal vibration between the supporting structure and the seismic isolation structure to the vertical seismic isolation device is reduced by the sliding mechanism, and thus the rigidity of the vertical seismic isolation device is reduced. It is possible to prevent an adverse effect on the seismic isolation performance of the seismic device. In addition, by appropriately setting the frictional resistance value when the sliding mechanism slides, the frictional resistance can function as a damping element for horizontal vibration.

Further, in the three-dimensional seismic isolation device according to claim 3 of the present invention, since the sliding mechanism is constituted by a rolling bearing or a sliding bearing, the horizontal mechanism between the support structure and the seismic isolation structure is provided. Since the input of vibration to the vertical seismic isolation device can be significantly reduced, the design of the vertical seismic isolation device is facilitated.

Further, in the three-dimensional seismic isolation device according to claim 4 of the present invention, the horizontal seismic isolation device has a horizontal isotropic restoration performance, so that A suitable horizontal seismic isolation function can be exhibited in any direction.

Further, in the three-dimensional seismic isolator according to the fifth aspect of the present invention, the vertical seismic isolator is constituted by a laminated body of disc springs. The portion is expanded and contracted, and the conical springs rub against each other by the expansion and contraction deformation, so that the rigidity and the damping effect can be obtained by the friction effect at this time.

Further, in the three-dimensional seismic isolation device according to claim 6 of the present invention, since an energy absorbing device is added to the vertical seismic isolating device, the energy absorbing device is activated by the input of the vertical vibration and the vertical Vibration energy in the direction can be absorbed.

Further, in the three-dimensional seismic isolation device according to claim 7 of the present invention, the pair of engaging members are relatively movable up and down with respect to each other, so that the weight of the seismic isolation structure and the vertical While the motion does not act between the engaging members, since they are engaged with each other in the horizontal direction, the horizontal relative movement is transmitted between the seismic isolation structure and the support structure, and the horizontal seismic isolation device is used. It can be operated properly. Further, since the horizontal engagement and the vertical movement can be ensured, the configuration is very simple.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a basic structure of a three-dimensional seismic isolation device of the present invention.

FIG. 2 is a front view showing an embodiment of the three-dimensional seismic isolation device of the present invention.

FIG. 3 is a front view of a part of a vertical seismic isolation device showing one embodiment of the three-dimensional seismic isolation device of the present invention.

FIG. 4 is a plan sectional view of the upper and lower seismic isolation device showing one embodiment of the three-dimensional seismic isolation device of the present invention.

FIG. 5 is a spring characteristic diagram of the vertical seismic isolation device showing one embodiment of the three-dimensional seismic isolation device of the present invention.

FIG. 6 is a front view showing another embodiment of the three-dimensional seismic isolation device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Three-dimensional seismic isolation device 12 Support structure 14 Seismic isolation structure 16 Horizontal seismic isolation device 18 Vertical seismic isolation device 20 Transmission means 22 Laminated rubber 26 Disc spring laminated body 28 Rolling bearing 32 Cylindrical body 32a Shaft body 60 Wall 62 Hanging Part 64 elastic spring 65 damping device

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takahiro Somagi 2- 15-2 Konan, Minato-ku, Tokyo F-term (reference) 3J048 AA03 AB01 BA08 BC05 BE12 BE15 BG02 BG04 DA01 EA38

Claims (7)

[Claims] 1. A horizontal seismic isolation device for horizontally seismic isolation between a support structure and a seismic isolation structure disposed above the support structure with a space therebetween, and both structures. A vertical seismic isolation device that vertically isolates between objects is arranged in parallel, and a vertical relative position of the seismic isolation structure is located between the horizontal seismic isolation device and at least one of the support structure and the seismic isolation structure. A three-dimensional seismic isolation device characterized by interposing transmission means for allowing movement and transmitting horizontal relative movement to the horizontal seismic isolation device. 2. A sliding mechanism interposed between the vertical seismic isolation device and at least one of the support structure and the seismic isolation structure, wherein a sliding mechanism that allows horizontal relative movement between the two is provided. The three-dimensional seismic isolation device described. 3. The three-dimensional seismic isolation device according to claim 2, wherein the sliding mechanism is a rolling bearing or a sliding bearing. 4. The three-dimensional seismic isolation device according to claim 1, wherein the horizontal seismic isolation device has a horizontal isotropic restoration performance. 5. The three-dimensional seismic isolation device according to claim 1, wherein the vertical seismic isolation device is a laminate of disc springs. 6. The three-dimensional seismic isolation device according to claim 1, wherein an energy absorbing device is added to the vertical seismic isolation device. 7. The transmission means is provided between the horizontal seismic isolation device and at least one of the support structure and the seismic isolation structure, and engages with each other in a horizontal direction and relatively moves in a vertical direction. The three-dimensional seismic isolation device according to any one of claims 1 to 6, comprising a pair of possible engagement members.