JP2003206986A - Base-isolating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base-isolating device which prevent falling of an isolated structure by keeping the positional relation between the gravity center of the isolated structure and each of rollers at an earthquake, and supports the isolated structure for stable base-isolation. <P>SOLUTION: A first roller 5 and a second roller 6 are loaded on recesses 4c and 3c of each rail from above a second rail 4 and a first rail 3, and the second rail and the first rail are arranged under the first roller and the second roller. Thus, a constant distance is kept to the installation points of each of the first roller and the second roller, and falling caused by an inertial force F acting on the gravity center G1 of the isolated structure can be prevented, and stable base-isolating performance can be provided. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a seismic isolation device that damps vibrations (vibrations) such as earthquakes.

[0002]

2. Description of the Related Art Conventionally, as a seismic isolation device, for example, a seismic isolation device 200 as shown in FIG. 7 has been known.

In this conventional seismic isolation device 200, rails extending linearly in the horizontal direction and curved in the vertical direction and rollers for rolling the rails are arranged in a well shape at an angle of approximately 90 degrees. The rail is composed of a rail 201 arranged on the upper pedestal 1 on which the seismic isolation target P1 is installed, and a rail 202 arranged on the lower pedestal 2 installed on the support surface T via the pedestal Q. It Further, the rollers are composed of rollers 204 rolling on the rails 202 and rollers 203 movably supporting the rails 201, and are interposed between the upper mount 1 and the lower mount 2.

According to this conventional seismic isolation device 200, the rail 201 is moved by the roller 20 due to horizontal vibration caused by earthquake motion.
3 is movably supported, and the rail 201 moves along the curve of the rail 201 so as to roll the roller 203. Then, the vibration in the horizontal direction is damped by its own weight (the load of the seismic isolation target P1 and the like) and the restoring force due to the bending of the rail 201 that moves the roller 203. Therefore, the vibration energy in the horizontal direction is absorbed and attenuated by repeating the absorption and attenuation of the vibration.

Further, for example, the one described in Japanese Patent No. 3131830 is known. Similar to the seismic isolation device 200 shown in FIG. 7, this seismic isolation device has a rail extending linearly in the horizontal direction and curved in the vertical direction and a roller rolling the rail in a well-shaped manner at an angle of approximately 90 degrees. It will be arranged. The rail is composed of a pair of an upper rail and a lower rail that are placed opposite to each other so as to sandwich the roller, and performs a seismic isolation operation similar to that of the seismic isolation device 200 described above to isolate the seismic isolation target from seismic motion. ing.

[0006]

However, in the above-described conventional seismic isolation device 200 and the seismic isolation device described in Japanese Patent No. 3131830, the rail 201 that extends linearly in the horizontal direction and is curved in the vertical direction is curved. The concave surface 201a is installed downward with respect to the seismic isolation target P1. The structure of such a seismic isolation device is configured such that the distances r1 and r between the center of gravity G1 of the seismic isolation target P1 and the roller 203 in the normal state.
2 has a center of gravity of G1 to G2 due to seismic isolation during an earthquake
By moving the center of gravity G2 to the roller 203, the distances from the center of gravity G2 to the rollers 203 are different from each other, and the distance from the center of gravity to the roller is constantly changed. Therefore,
The center of gravity G2 of the seismic isolation target P2 during an earthquake will always move with respect to the roller 203, which poses a problem of increasing the risk of the seismic isolation target P1 falling.

The present invention has been made in consideration of the above problems, and prevents the seismic isolation target from falling over by making the positional relationship between the center of gravity of the seismic isolation target and each roller in an earthquake motion constant. , It is an object to provide a seismic isolation device that supports a seismic isolation target and stably isolates it.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the seismic isolation apparatus according to the present invention employs the following means.

That is, according to the first aspect of the present invention, a seismic isolation device is provided in which rails that extend linearly in the horizontal direction and are curved in the vertical direction and rollers that roll the rails are arranged in a well shape with an angle of approximately 90 degrees. In the above, the upper mount and the lower mount face the seismic isolation target and the supporting surface, and the second rail on which the first roller rolls and the second roller on which the first rail rolls are the upper mount. The first roller is disposed between the base and the lower base, and the first roller is installed on the upper base on which the base-isolation target is installed, and the first roller is moved from the center of gravity of the base-isolation target to It is characterized in that the distance to the first roller is constant.

According to this means, the center of gravity of the seismic isolated object moved in seismic isolation operation is set with respect to the installation position of the first roller by installing the first roller on the upper frame on which the seismic isolated object is installed. It is always kept constant.

According to a second aspect of the present invention, in the seismic isolation apparatus according to the first aspect, the distance from the center of gravity of the seismic isolated object moved by the seismic isolation operation to the second roller is constant. And

According to this means, as in the first aspect, the center of gravity of the seismic isolation object moved in seismic isolation operation is always maintained constant with respect to the installation position of the second roller.

According to a third aspect of the present invention, in the seismic isolation apparatus according to the first or second aspect, the first rail and the second rail are disposed with their curved concave sides facing upward, and the first roller and the second roller are , And are mounted on the concave surfaces, respectively.

In this means, the first roller and the second roller are mounted on the concave surfaces of the rails from above the second rail and the first rail, and the second rail and the first rail are the first roller and the first roller. By being arranged below the second roller, the seismic isolation target object installed above the seismic isolation device is stably supported by the first roller and the second roller during seismic isolation. Seismic isolated.

[0015]

Embodiments of the seismic isolation device according to the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment (1) of a seismic isolation device according to the present invention.

In this embodiment, the supporting surface T on which the seismic isolation target P1 is installed is made of a slab which is a structural body. Moreover, what is installed on the pedestal Q fixed to the support surface T is shown.

The seismic isolation device 100 of this embodiment is mainly composed of an upper frame 1, a lower frame 2, a first rail 3, a second rail 4, a first roller 5 and a second roller 6.

The upper pedestal 1 is a flat plate material having a relatively large thickness facing the seismic isolation target P1 and is formed in a rectangular shape with one side W2 and the other side W1. Along the one side of the lower surface of the upper pedestal 1, a fixed surface 8a of the bearing portion 8 formed in a box shape.
Are abutted and fixed. The first roller 5 has a bearing portion 8
Is installed through. The upper surface of the upper mount 1 is
It is installed in contact with the seismic isolation target P1.

The first roller 5 includes two rollers 5a on one side,
5b is an inter-installation distance R2, and a total of four are installed in the bearing portion 8. The first roller 5 is configured to be installed so as to project from the side surface side adjacent to the fixed surface 8a, not the lower surface of the bearing portion facing the fixed surface 8a of the bearing portion 8.

The lower pedestal 2 is a flat plate member having a relatively large thickness facing the support surface T, and is formed in a rectangular shape corresponding to the upper pedestal 1. A first rail 3 is attached along the other side of the upper surface of the lower mount 2. The lower surface of the lower mount 2 is
It is installed in contact with the pedestal Q.

The first rail 3 has a concave surface 3c extending linearly in the horizontal direction and curved in the vertical direction, and two rails 3a and 3b on one side are set as one set, and a part of the disposition area is overlapped. Are arranged in parallel so as to have an overlapping section D1 formed by Two rails on each side, for a total of four rails, each with a rail length of L
At 1, the second roller 6 rolls on each rail.

The second rail 4 on which the first roller 5 mounted on the upper frame 1 rolls is engraved on a columnar rail frame 9.

The second rail 4 has a concave surface 4c which extends linearly in the horizontal direction in which two rollers 5a and 5b each having a rail length L2 and two rollers 5a and 5b roll on one side, and which is curved vertically. It is composed of rails 4a and 4b arranged above. Further, the two rails 4a and 4b are installed in parallel on the same base axis. Therefore, the bearing portion 8 of the first roller 5
The protruding lengths from are set to the same length.

The second roller 6 rolling on the first rail 3 mounted on the lower mount 2 is mounted on a columnar roller frame 10.

The second roller 6 is composed of rollers 6a and 6b corresponding to the two rails 3a and 3b on one side, which are arranged in parallel with each other so as to overlap a part thereof with an overlapping section D1. The two rollers 6a and 6b on one side are configured so that the protruding lengths from the roller frame 10 are d1 and d2, respectively.

The rail frame 9 and the roller frame 10 described above are assembled in a two-well shape to form a dolly together with the second rail 4 and the second roller 6.
It is movably arranged between the lower frame 2 and the lower frame 2.

The first rollers 5a and 5b are connected to the second rail 4
The second roller 6 and the second roller 6 are arranged so as to be located at substantially the central portion 40a on the rollers a and 4b, respectively.
Similarly to the first roller 5, a and 6b are arranged at an installation distance R1. Therefore, the first roller 5 and the second roller 6 roll on the respective rails within the rail length range during the seismic isolation operation, and the rolling distance is a maximum of approximately ½ of each rail length. Strokes S2 and S1.

In this embodiment (1), the seismic isolation target P
1 is installed on the upper surface side of the upper pedestal, and the height from the first roller 5 installed on the lower surface side of the upper pedestal 1 to the center of gravity G1 of the seismic isolation target P1 is H1. The height from the two rollers 6 to the center of gravity G1 is H2.

Therefore, as shown in FIG. 1, the seismic isolation device 100 of the embodiment (1) has the first roller 5 fixed to the upper mount 1 on which the seismic isolation target P1 is installed. The distances La and Lb from the center of gravity G1 of P1 to the first rollers 5a and 5b are always constant.

Further, as shown in FIG. 3, also in the second roller 6 movably arranged between the upper mount 1 and the lower mount 2, the center of gravity of the seismic isolation target P1 is, like the first roller 5. G1
To the second rollers 6a, 6b from the respective distances Ld,
Lc is always constant.

Further, the first roller 5 and the second roller 6
Are mounted on the concave surfaces 4c, 3c of the respective rails from above the second rail 4 and the first rail 3, and the second rail 4
Since the first rail 3 is disposed below the first roller 5 and the second roller 6, the center of gravity G1 of the seismic isolation target P1 is
Provides an optimum configuration in which a constant distance is maintained with respect to the respective installation positions of the first roller 5 and the second roller 6.

Further, the seismic isolation device 100 is arranged at a position from the seismic isolation target P1 to the seismic isolation target P1 → upper mount 1 → first roller 5 → second rail 4, second roller 6 → first rail 3 →
The lower pedestal 2 becomes the supporting surface F, and the seismic isolation target object P1 installed on the upper side of the seismic isolation device 100 is supported by the first roller 5 and the second roller 6, and is stably seismically isolated.

Therefore, the seismic isolation operation of the seismic isolation device 100 in the seismic motion corresponds to the vibration in the horizontal direction by the first roller 5,
The second roller 6 rolls and moves on the second rail 4 and the first rail 3 along the curved concave surfaces 4c and 3c. And
Then, by its own weight (the load of the seismic isolation target P1 and the like) and the restoring force by the curved concave surfaces 4c and 3c of the second rail 4 and the first rail 3 on which the first roller 5 and the second roller 6 roll,
Horizontal vibrations are dampened. Therefore, the vibration energy in the horizontal direction is absorbed and attenuated by repeating the absorption and attenuation of the vibration.

Next, the conditions under which the seismic isolation target P1 does not fall during seismic isolation operation due to seismic motion will be described using mathematical expressions and the like.

In FIGS. 1 and 3, the seismic isolation target in a normal state in which the seismic isolation device 100 does not perform seismic isolation is P1, and its center of gravity is G1. The seismic isolation target object of the seismic isolation operation due to the seismic motion of the seismic isolation device 100 is P2, and its center of gravity is G2. Therefore, the seismic isolation operation moves the seismic isolation target from the seismic isolation target P1 to the seismic isolation target P2 in the Y1 direction, and the center of gravity of the seismic isolation target also moves from G1 to G2.

The installation positions of the first rollers 5a and 5b, which are installed on the lower surface side of the upper pedestal 1 via the bearing portion 8a, are fulcrums Ja and Jb, respectively, and the points at which the center of gravity G1 hits the upper pedestal 1 vertically intersect. Let K1. The distances from the intersection K1 to the fulcrums Ja and Jb on both sides are La and Lb.
The weight of the seismic isolation target P1 is W.

At the time of seismic isolation, the center of gravity G of the seismic isolation object P1
The inertial force F1 acts on the support member 1 horizontally with respect to the support surface T. The inertial force F1 is expressed as F1 = (W / g) × a1 (Equation 1) by defining the acceleration when the upper pedestal 1 moves in the Y1 direction due to earthquake motion as the fall response acceleration of the seismic isolation device 100. be able to. In addition, the condition that the seismic isolation target P1 does not fall is the intersection point K caused by the weight of the seismic isolation target P1.
The rotational moment M1 = W × La at 1 is the inertia force F
It suffices that the rotation moment M2 is larger than M2 = F1 × H1. Therefore, F1 × H1 <W × La (Equation 2) is established, and from Equations 1 and 2, the fall response acceleration a1 of the seismic isolation device 100 is expressed as a1 <(La / H1) × g (Equation 3). It is represented by 3, which is a condition that the seismic isolation target P1 does not fall. Here, g indicates gravitational acceleration.

In the seismic isolation operation, the first roller 5 and the second roller 6 roll on the curved first rail 3 and second rail 4 having the concave surfaces 3c and 4c, so that the first roller 5 and the second roller 6 are moved. The displacement amount h1 that moves vertically is a value that is sufficiently smaller than H1. Therefore, the fulcrums Ja and Jb in Expression 3 are
The center of gravity G of the seismic isolation target P1 from the (first rollers 5a, 5b)
Since the distance H1 to 1 is H1 >> h1,
H1≈H1 + h1 may be set as a constant.

Therefore, in equation 3, H1 and g can be treated as constants, so that the fall response acceleration a1 of the seismic isolation device is from the intersection K1 to the fulcrums Ja and Jb (first roller 5a,
It is proportional to the distances La and Lb to the installation position 5b).

Therefore, the distance L of the conventional embodiment shown in FIG.
Is shortened from the distance r2 to the distance r4 during seismic isolation,
The fall response acceleration repeatedly increases and decreases as the distance L expands and contracts, and the seismic isolation target P1 may not be stably supported, and the seismic isolation target P1 may fall. However, according to this embodiment (1), since the distances La and Lb are constant at normal times and during seismic isolation due to seismic motion, the center of gravity of the seismic isolated object P1 is set with respect to the seismic isolated object P1. It provides extremely stable seismic isolation performance to prevent falls due to the acting inertial force F.

Further, as shown in FIG. 3, the seismic isolation target P1
The second roller 6 that rolls on the first rail 3 installed on the lower mount 1 even if the vehicle moves in the X1 direction during seismic isolation is configured in the same manner as the first roller 5 and is attached to the first rail 3. Since they are mounted, the distances from the intersection K2 to the fulcrums Jc, Jd (second rollers 6a, 6b) are Ld, Lc, and the fulcrum Jc,
As the height H2 from Jd to the center of gravity G1, the fall response acceleration a2 of the seismic isolation device 100 is a2 <(Lc / H2) × g (Equation 4) from the above Equation 3, and the above-mentioned first roller 5 and The same action and effect as the second rail 4 are exhibited.

Therefore, the seismic isolation device 100 is the upper mount 1.
It provides constant fall response accelerations a1 and a2 to the seismic isolation target P1 installed on the upper surface of the seismic isolation target P1.
It is possible to stabilize the movement of the center of gravity G1 of the vehicle and to provide the seismic isolation performance that is more improved by preventing the vehicle from falling.

Further, the seismic isolation device 10 thus constructed
The first rails 3a and 3b of 0 are the conventional seismic isolation devices 2 described above.
As in 00, two rails are not arranged in a straight line, but the overlapping regions D1 are partially overlapped to form an overlapping section D1. The length of the other side is W1 = L1 + L1-D1 and it is possible to reduce the length of the overlapping section D1.

Further, the seismic isolation device 100 capable of reducing the length of the overlapping section D1 has the same length as the seismic isolation device 100 without reducing the rail length of the first rail 3 on which the second roller 6 rolls. Since the outer dimensions are reduced, each rail length L1 is ensured for the seismic isolation device to exert sufficient performance in seismic isolation operation, and the rolling distance of the roller rolling on the rail is sufficiently provided.

Therefore, the seismic isolation device 100 is not limited to the rail length of the first rail 3 to be installed, and the seismic isolation target P
It is also possible to provide the seismic isolation device 100 corresponding to various shapes, sizes, etc.

Further, the rail frame 9 and the roller frame 10 are assembled in a well shape and movably interposed between the upper mount 1 and the lower mount 2, whereby the first roller 5a,
5b, from the side surface side adjacent to the fixed surface 8a of the bearing portion 8,
This makes it easier to vertically install the second rail in the longitudinal direction, and installs the first roller 5a, 5b on the lower surface side of the bearing portion 8 on the side opposite to the fixed surface 8a as compared with the case where the first roller 5a, 5b is installed. The distance between the platform 1 and the lower platform 2 is determined by the first rollers 5a, 5b.
The width of the wheel can be reduced, and the center of gravity G1 of the seismic isolation target P1 can be kept low. Therefore, seismic isolation target P
1 is more stable and is installed on the upper surface of the upper mount 1.

Further, the second rollers 6a, 6b protruding from the roller frame 10 are also installed so as to vertically project in the lengthwise direction of the first rail, so that the upper mount 1 and the lower mount 2 are separated from each other. Reduced from the distance between them, the seismic isolation target P1
It is possible to further lower the height at which the seismic motion can fall (the center of gravity G1 of the seismic isolation target P1), and it is possible to prevent the seismic isolation target P1 from falling.

Furthermore, the two first rails 3a and 3b are
It is arranged in parallel so as to provide an overlapping section D1 in the arrangement area. Therefore, the stroke lengths S1 of the second rollers 6a and 6b that roll due to horizontal vibration are overlapped by the overlap section D1, and the overlap distance is about D1.
Since the horizontal vibration in which the vibration energy for the overlapping distance D1 is attenuated is transmitted to the upper base 1, the absorption attenuation of the vibration energy is further improved.

Further, in the operation of absorbing and damping the vibration energy, the upper pedestal 1 is formed of a relatively thick plate material facing the seismic isolation target P1, and the first roller 5 and the bearing portion 8 function as a reinforcing material. Since the lower pedestal 2 is attached to the support surface T and the first rail 3 is attached as a reinforcing material by being formed of a relatively thick plate material facing the support surface T, the seismic isolation strength is increased and the seismic isolation device 100 is installed. The twist deformation of the is prevented. Therefore, an effective seismic isolation function is provided for a long period of time.

Further, the second rail 4, the second roller 6, the rail frame 9, and the roller frame 10, which are assembled in the shape of a car and are formed into a dolly, are movable between the upper pedestal 1 and the lower pedestal 2. And the first roller 5, the bearing portion 8, and the first rail 3, which are fixedly mounted on the upper mount 1 and the lower mount 2, are separately arranged, so that the upper mount 1, the lower mount 2
The installation space, which is the space between, becomes low. Therefore, it can be easily installed on the support surface T composed of an underfloor slab,
The center of gravity G1 of the seismic isolation target P1 installed on the upper surface of the upper mount 1 can be maintained at a lower position, and stable seismic isolation performance can be exhibited.

4 to 6 show an embodiment (2) according to the present invention.

In this embodiment (2), an opening 7 is opened at approximately the center of the upper frame 1 and the lower frame 2 of the above-mentioned embodiment (1).

The seismic isolation device 150 of this embodiment (2)
Assuming that the seismic isolation target P1 installed on the upper surface of the upper pedestal 1 is a rack of electronic equipment such as a server rack or an exhibition stand for works of art, etc., wiring such as lighting and cables when used. An opening 7 is provided for inserting the.

A square wiring opening 7a having a side of W3 is formed at a substantially central portion of the upper mount 1, and a square wiring having a side of W4 is formed at a substantially central portion of the lower mount 2. Opening 7
b is opened.

Further, the protective member 12 is supported in the wiring opening 7a of the upper mount 1 via the support plate 11. The support plate 11 is provided with a mounting hole 11a in which a protective member 12 is fitted and mounted in the central portion thereof, and a large number of elongated ventilation holes 1 are formed in the periphery.
Since 1b is perforated in a staggered manner and surrounded by a mounting frame 11c, the mounting frame 11c is screwed onto the upper mount 1
It is installed in.

The protective member 12 is an elastic body formed of a coil spring in a conical cylindrical shape, and has a minimum diameter portion 12a provided near the lower end portion having a reduced diameter from the upper portion, and the minimum diameter portion 12a.
An expanding portion 12b having a diameter larger than that of the minimum diameter portion 12a is provided at the lower end portion of the lower part of the lower part of the base plate.
It is located between the first rail 3, the second rail 4, the first roller 5, and the second roller 6 which are in the shape of a well, facing the wiring opening 7b.

According to this embodiment (2), the space between the pedestal 2 and the supporting surface T below the pedestal Q is used to connect the wiring arranged under the floor to the display stand, electronic equipment and the like. The equipment C can be retracted under the lower mount 2. Then, the retracted wiring facility C is passed through the wiring opening 7b of the lower pedestal 2 and the protective member 12 (the wiring opening 7a of the upper pedestal 1) to provide seismic isolation such as an exhibition stand or electronic devices. It can be connected to the object P1. Therefore, since it is not necessary to install the wiring facility C for an unnecessarily long time, the seismic isolation operation of each rail and roller is not hindered during seismic isolation.

Further, in the protection member 12 in the operation of absorbing and damping the vibration energy, the minimum diameter portion 12a comes into contact with the wiring equipment C by the displacement of the upper pedestal 1 and the lower pedestal 2 and elastically deforms the whole, and the wiring equipment C is obtained. Buffer protect. The expanded portion 12b of the protection member 12 facilitates elastic deformation of the protection member 12. Further, since the expanded portion 12b of the protection member 12 is in a free state with respect to the lower mount 2, the elastic deformation amount of the protection member 12 becomes large.

Further, according to this embodiment (2),
The inside of the protection member 12 and the ventilation hole 11b of the support plate 11 ensure the ventilation A between the seismic isolation target P1 side and the support surface T side. Therefore, the cooling air supplied from below the floor to the seismic isolation target P1 can be circulated.

Further, as shown in FIG. 6, for example, during an earthquake, the first roller 5 moves on the second rail 4 in the X2 direction by the rolling distance S1, and the second roller 6 moves on the first rail in the Y2 direction. Move the rolling distance S2. At this time, the openings where the openings 7a and 7b of the upper pedestal 1 and the lower pedestal 2 overlap each other are formed in a square shape with one side length W5 and the other side length W6.
And wiring of cables connected to the seismic isolation target P1 are surely inserted to prevent the first rail 3, the second rail 4, the first roller 5, and the second roller 6 in seismic isolation operation at the time of earthquake. There is no. Therefore, the seismic isolation performance does not deteriorate, and the wiring such as the cable connected to the seismic isolation target P1 is not damaged. It should be noted that other actions and effects are achieved in the same manner as in the above-described embodiment (1).

As described above, in addition to the illustrated embodiment, the first rail 3 is a pair of individual rails 3a and 3b.
Is mounted on the lower mount 2, but like the second rail 4,
Each may be formed integrally. Conversely, the second rail 4
It is also possible to individually form and arrange a and 4b,
As for the first rail 3, the rails 3a and 3b may be arranged on the same base axis as the second rail 4 without providing the overlapping section D1.

Further, the upper mount 1 and the lower mount 2 may employ a structure composed of an angle member or the like, and the rail frame 9 and the roller frame 10 are not limited to columnar shapes. It can also be configured as a plate.

Further, the support surface T on which the seismic isolation target P1 is installed is not limited to one made of a slab which is a structural body, and there is no problem even if the support surface is a normal floor surface.

Further, the ventilation holes 11b of the support plate 11 may be circular holes, and it is not necessary to form the long holes in a staggered manner. Further, the support plate 11 may be attached by directly using a binder instead of the screw 13, and the shape and the attaching method are not limited to the above.

[0066]

As described above, in the seismic isolation apparatus according to the present invention, by installing the first roller on the upper platform on which the seismic isolation target is installed, the seismic isolation device is moved during seismic isolation operation during an earthquake. The center of gravity of the seismic object is always maintained at a constant distance with respect to each installation position of the first roller, and is also maintained at a constant distance also at the second roller. Therefore, the movement of the center of gravity of the seismic isolation target in a seismic motion is a constant distance, so the inertial force F acting on the center of gravity of the seismic isolation target is constant, preventing the seismic isolation target from falling and providing stable isolation. It can provide seismic performance.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing an embodiment (1) of a seismic isolation device according to the present invention.

FIG. 2 is a plan view showing a part of FIG. 1 removed.

FIG. 3 is a central longitudinal sectional view showing an embodiment (1) of the seismic isolation device according to the present invention.

FIG. 4 is a perspective view showing an embodiment (2) of the seismic isolation device according to the present invention.

5 is a central vertical cross-sectional view of the installed state of FIG.

FIG. 6 is a simplified cross-sectional view during a base isolation operation in FIG.

FIG. 7 is a vertical cross-sectional view showing a conventional example.

[Explanation of symbols]

1 Top stand 2 Lower stand 3 first rail 4 second rail 5 First roller 6 Second roller 7a Aperture opening 7b Lower frame opening 8 bearing Frame for 9 rails Frame for 10 rollers 11 Support plate 12 Protective material 100 Seismic Isolation Device of Embodiment (1) 150 Seismic Isolation Device of Embodiment (2) 200 seismic isolation device (conventional example) Center of gravity of G1 seismic isolation target (at normal time) G2 Center of gravity of seismic isolation target (at the time of seismic isolation) P1 seismic isolation target (normal time) P2 seismic isolation target (at the time of seismic isolation) T support surface

Claims (3)

[Claims] 1. A seismic isolation device in which rails extending linearly in the horizontal direction and curved in the vertical direction and rollers for rolling the rails are arranged in a well shape with an angle of approximately 90 degrees, and The lower mount is faced between the seismic isolation target and the supporting surface, and the second rail on which the first roller rolls and the second roller rolling on the first rail are connected to the upper mount and the lower mount. The first roller, which is disposed between the first roller and the center of gravity of the seismic isolated object that is moved by seismic isolation operation, is installed on an upper frame on which the seismic isolated object is installed. A seismic isolation device characterized by a constant distance. 2. The seismic isolation device according to claim 1, wherein the distance from the center of gravity of the seismic isolation target moved by the seismic isolation operation to the second roller is constant. . 3. The seismic isolation apparatus according to claim 1, wherein the first rail and the second rail are provided with curved concave surfaces on the upper surfaces, and the first roller and the second roller are respectively formed on the concave surfaces. Seismic isolation device characterized by being installed.