JP2000038774A - Base isolation element, building with same and base isolation element control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation element, a building with a base isolation element and a base isolation element control method, capable of absorbing a horizontal vibration applied from a foundation to a structure, and preventing the lift of the structure from the foundation upon the occurrence of an earthquake with a simple constitution. SOLUTION: A parallel link mechanism 11 is laid between a base isolation element support means 5 and a base isolation support plate 4, and the means 5 and the plate 4 are made to relatively travel in a horizontal direction via the parallel link mechanism 11, upon exposure to the horizontal vibration of an earthquake inputted to a foundation 2, thereby absorbing a horizontal vibration applied from the foundation 2 to a building 1. The building 1 is prevented from being lifted on the operation of the parallel link mechanism 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device, in which a seismic isolation bearing means functions in the event of an earthquake to absorb horizontal vibrations that are input from a support to a supported member, a building with the seismic isolation device and The present invention relates to a seismic device operation control method.

[0002]

2. Description of the Related Art Conventionally, structures such as buildings and the like include:
As a seismic isolation device between a base (support) and a structure (supported body), there is a device equipped with seismic isolation bearing means such as a laminated rubber bearing member, a rolling bearing member, and a sliding bearing member.

[0003]

The above seismic isolation device is
It is desirable that the structure be as simple as possible to absorb horizontal vibrations that are input from the foundation to the structure in the event of an earthquake and to prevent the structure from rising from the foundation.

Accordingly, the present invention provides a seismic isolation device and a seismic isolation device that can absorb horizontal vibrations that are input from a foundation to a structure when an earthquake occurs and can prevent the structure from rising from the foundation with a simple configuration. It is an object of the present invention to provide a building with a seismic device and a method of controlling the operation of a seismic isolation device.

[0005]

In order to achieve this object, a first aspect of the present invention is an image forming apparatus in which a supporting surface is attached to one of a lower surface of a supported member and an upper surface of the supporting member and the contact supporting surface faces the other. A seismic support plate, and a seismic isolation bearing mounted on the other of the lower surface of the supported member and the upper surface of the support member and abutting on the abutting support surface of the seismic isolation support plate so as to be relatively movable in the horizontal direction. Means, and the seismic isolation support means and the seismic isolation support plate, which are interposed between the supported body and the support body to which the seismic isolation support plate is attached, and the seismic isolation support means. The seismic isolation device is provided with telescopic support means capable of permitting relative movement in the horizontal direction and preventing floating above the supported body.

According to this configuration, when the horizontal vibration of the earthquake is input to the support, the telescopic support means expands and contracts, and the seismic isolation support plate and the seismic isolation support means relatively move in the horizontal direction. This absorbs the horizontal vibration that is input from the support to the supported body, and also prevents the supported body from floating upward.

Further, the invention of claim 2 is characterized in that the expansion and contraction support means of claim 1 is a parallel link mechanism and further includes expansion and contraction restriction means for restricting expansion and contraction of the expansion and contraction support means. According to this configuration, the horizontal vibration of the earthquake that is going to be input to the supported body is absorbed by the parallel link mechanism, and the lift of the supported body is prevented by the parallel link mechanism. In addition, a restoring function, a damping function, a locking function, or the like can be provided to the telescopic support means.

Further, according to a third aspect of the present invention, the expansion and contraction support means according to the first and second aspects is a parallel link mechanism, and is interposed between the support and the supported body to be attached to the supported body. It is characterized by comprising a return means for constantly applying a return force to the original state in the horizontal direction.

According to this structure, when the horizontal vibration of the earthquake is input to the support, the parallel link mechanism expands and contracts, and the support plate for seismic isolation and the seismic isolation support means relatively move in the horizontal direction. The horizontal vibration is absorbed. At the same time, the parallel link mechanism prevents the supported body from lifting. On the other hand, after the end of the earthquake, the return means returns the supported body to its original state.

According to a fourth aspect of the present invention, the expansion and contraction support means according to any one of the first to third aspects is a parallel link mechanism, and the seismic isolation support plate is attached to the supported body and the support body. And two separable joints of the parallel link mechanism are rotatably held by the joint and the seismic isolation bearing means, respectively, and the telescopic support means is a pair of joints on the other diagonal of the parallel link mechanism. It is characterized by having a damper interposed therebetween.

According to this structure, when the horizontal vibration of the earthquake is input to the support, the parallel link mechanism expands and contracts, and the seismic isolation support plate and the seismic isolation bearing move relatively in the horizontal direction. Thus, the horizontal vibration is absorbed. At the same time,
The parallel link mechanism prevents the supported body from lifting. At this time, the damper absorbs sudden expansion and contraction of the parallel link mechanism, and the horizontal vibration of the earthquake that is going to be input from the support to the supported body is absorbed by the action of the parallel link mechanism and the damper.

Further, the invention of claim 5 is characterized in that the contact support surface of the seismic isolation support plate is concave. According to this configuration, after the end of the above-mentioned earthquake, the seismic isolation and contraction support means is moved and returned to the center of the contact support surface of the seismic isolation support plate by the action of the concave surface due to the weight of the supported body, and The supported member returns to the original state.

According to a sixth aspect of the present invention, there is provided a building with a seismic isolation device according to any one of the first to fifth aspects, wherein the supported body is a building, the supporting body is a foundation of the building, and The support means is provided with a return means, and the expansion and contraction support means is provided at a plurality of positions, and the direction of action of the horizontal return force by each of the return means is different.

According to this structure, the supported member is returned to the original state by the return force of the plurality of return means.

According to a seventh aspect of the present invention, in the seismic isolation device operation control method, the restricting means for restricting the expansion and contraction of the expansion and contraction support means is controlled by an earthquake detection means or an air flow detection means. And

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

(1) First Embodiment [Structure] <Basic structure for preventing lifting> In FIG.
Is a building (supported body) such as a house, and 2 is a foundation (supported body) of the building 1. A plurality of seismic isolation devices 3 are interposed between the lower surface of the floor 1 a of the building 1 and the foundation 2. As shown in FIGS. 1B and 2, the plurality of seismic isolation devices 3
a are arranged in the vicinity of the four corners. In addition, FIG.
2 shows the arrangement and expansion / contraction direction 3a of the seismic isolation device 3 omitting a specific configuration, FIG. 2 shows a schematic configuration and arrangement of the seismic isolation device 3, and FIG. 3 shows a schematic configuration of the seismic isolation device 3 in FIG. Is enlarged.

This seismic isolation device 3 is, as shown in FIG.
Seismic isolation support plate 4 made of iron plate attached to the upper surface of foundation 2
And seismic isolation bearing means 5 disposed between the floor 1a of the building 1 and the seismic isolation support plate 4. The seismic isolation bearing means 5 includes a support shaft 6 attached to the lower surface of the floor 1a, a ball bearing member 7 screwed to the support shaft 6, and a steel ball rotatably held by the ball bearing member 7. (Steel ball) 8. The ball 8 is in contact with the upper surface (contact support surface) 4 a of the seismic isolation support plate 4. The ball 8 allows the seismic isolation bearing means 5 to move horizontally with respect to the seismic isolation support plate 4.

Further, the seismic isolation device 3 includes a base 9 fixed on the base 2 in proximity to the seismic isolation support plate 4, a support shaft 10 protruding from the base 9, and a parallel support as telescopic support means. It has a link mechanism 11.

The parallel link mechanism 11 has four links (arms) 12, 13, 1 as shown in FIGS.
4,15. The cylindrical portions 12a and 13a at one ends of the links 12 and 13 are rotatably held by the support shaft 6 to form a first joint 16, and the cylindrical portions 14a and 15a are supported at one ends of the links 14 and 15 by the support. The second joint 17 is formed rotatably on the shaft 10 (see FIGS. 6 and 7). A line connecting the centers of the first and second joints 16 and 17 is the expansion and contraction direction 3a in FIG. 1B. The expansion / contraction direction 3a is directed to the corner direction of the building 1. In addition, the other ends of the links 13 and 14 are rotatably held by pins 20 to form a third joint 18, and the other ends of the links 12 and 15 are rotatably held by pins 21 and Joint 19
Is formed.

The first and second joints 16, 17 and 18,
19 are located diagonally. The parallel link mechanism 11 expands and contracts in the horizontal direction to allow relative movement in the horizontal direction between the seismic isolation support means 5 and the seismic isolation support plate 4.

As shown in FIG. 6 and FIG.
2a and 13a are restricted from moving in the vertical direction between the step 6a of the support shaft 6 and the ball receiving member 7, and the cylindrical portions 14a and 15a are provided at the step 10a of the support shaft 10 and the upper end of the support shaft 10. The movement in the vertical direction between the nut 22 and the screwed nut 22 is restricted. This prevents the building 1 from being lifted upward.

[Operation] Next, the operation of the building with the seismic isolation device having such a configuration will be described.

According to this configuration, when the horizontal vibration of the earthquake is input to the foundation (support) 2, the foundation 2 vibrates and moves in the horizontal direction, but the building 1 is stationary due to the inertial force. The seismic isolation support plate 4 and the base 9 vibrate in the horizontal direction, and the balls 8 of the seismic isolation support means 5 roll on the upper surface 4a of the seismic isolation support plate 4. As a result, the parallel link mechanism 1 moves in the direction in which the distance between the first and second joints 16 and 17 increases and decreases.
1 expands and contracts, and the seismic isolation bearing means 5 moves in the horizontal direction with respect to the seismic isolation support plate 4.

Furthermore, upon absorbing such vibrations, the parallel link mechanism 11 prevents the building 1 from rising.

(2) Second Embodiment In this embodiment, the structure of the first embodiment is added to FIGS. 8 (a) and 8 (b).
This is an example in which the shock absorber 23 shown in FIG.

That is, in this embodiment, the parallel link mechanism 11
8A, between the third and fourth joints 18 and 19 of FIG.
A shock absorber 23 as shown in FIG. The shock absorber 23 has a shaft-like damper 24 which can be extended and contracted, and a coil spring 25 as a return means.

The damper 24 includes a cylinder 26, a piston 27 slidably fitted in the cylinder 26 to partition the inside of the cylinder 26 into two fluid chambers 26 A, 26 B, 27 has a piston rod 28 provided integrally therewith. An orifice 29 is formed in the piston 27 to communicate the fluid chambers 26A and 26B. The fluid chambers 26A and 26B are filled with fluid such as compressible air and incompressible liquid. As the gas, for example, air can be used, and as the liquid, water (for example, tap water) or oil can be used.

A flange 30 is provided near the outer end of the piston rod 28, and a flange 31 is provided at the other end of the cylinder 26.
Between them, a coil spring 25 is interposed. Moreover, although the detailed attachment state is omitted in the drawing, the attachment portion 28a provided at the outer end of the piston rod 28 and the cylinder 26
The attachment part 26a provided at the other end of the third and fourth joints 18,
The shock absorber 23 is interposed between the third and fourth joints 18 and 19 by being rotatably supported by the pins 20 and 21 respectively.

As a result, the spring force of the coil spring 25 urges the third and fourth joints 18 and 19 in a direction to open each other, and the first and second joints 16 and 17 of the parallel link mechanism 11.
It acts as a restoring force (restoring force) in the contraction direction in which the interval between them becomes smaller. Moreover, the four corners of building 1 (four corners)
Each seismic isolation device 3 installed in the vicinity of the shock absorber 2
Three. Then, the restoring force by the spring force of the coil spring 25 of each seismic isolation device 3 acts in a different direction, that is, in the direction of expansion and contraction (the direction of each corner of the building 1) 3a.

[Operation] Next, the operation of the building with the seismic isolation device having such a configuration will be described.

According to this configuration, when the horizontal vibration of the earthquake is input to the foundation (support) 2, the foundation 2 vibrates and moves in the horizontal direction, but the building 1 is stationary due to the inertial force. The seismic isolation support plate 4 and the base 9 vibrate in the horizontal direction, and the balls 8 of the seismic isolation support means 5 roll on the upper surface 4a of the seismic isolation support plate 4. As a result, the parallel link mechanism 1 moves in the direction in which the distance between the first and second joints 16 and 17 increases and decreases.
1 expands and contracts, and the seismic isolation bearing means 5 moves in the horizontal direction with respect to the seismic isolation support plate 4.

At this time, the damper 24 of the shock absorber 23 expands and contracts against or by the spring force of the coil spring 25, and the piston 27
6, the fluid in one of the fluid chambers 26A and 26B flows into the other via the orifice 29 of the piston 27, and the horizontal vibration input to the foundation 2 is absorbed. In addition, due to the action of the damper 24, a moving force in the vibration direction slightly acts on the building 1, but the building 1 is almost prevented from vibrating due to the inertial force of trying to stop.
The flow rate of the orifice 29 and the coil spring 2
The vibration absorbing performance is determined by the spring force of No. 5.

In absorbing such vibrations, the parallel link mechanism 11 prevents the building 1 from rising.

On the other hand, after the end of the earthquake, the spring force of the coil spring (return means) 25 causes the parallel link mechanism 11 to return to its original state, and the building 1 to return to its original state. The coil springs 25 are provided in the respective seismic isolation devices 3 arranged in the vicinity of the four corners of the building 1. Acting in the direction 3a).

In the embodiment described above, the seismic isolation support plate 4 and the base 9 are attached to the foundation 2 and the seismic isolation bearing means 5 is attached to the floor 1a of the building 1, but it is not necessarily limited to this. Not something. For example, the seismic isolation support plate 4 and the base 9 may be mounted on the lower surface of the floor 1 a of the building 1, and the seismic isolation bearing means 5 may be fixed to the foundation 2.

(3) Third Embodiment In the above-described embodiment, the return means is provided by the coil spring 25.
However, the present invention is not necessarily limited to this. For example, the above-described coil spring 25 is omitted, and only the damper 24 is left as expansion / contraction limiting means as shown in FIG. 9, and the upper surface 4a of the seismic isolation support plate 4 as shown in FIG.
May be formed in a concave shape, and the upper surface 4a may be a concave contact support surface with which the ball 8 contacts.

Also in the case of this embodiment, when the horizontal vibration of the earthquake is input to the foundation (support) 2, the foundation 2 vibrates and moves in the horizontal direction, but the building 1 is stationary due to the inertial force. Therefore, the seismic isolation support plate 4 and the base 9 vibrate and move in the horizontal direction, and the ball 8 of the seismic isolation support means 5 rolls on the upper surface 4a of the seismic isolation support plate 4.

During this rolling, as the ball 8 moves toward the edge of the upper surface 4a, the ball 8 tends to return to the center of the upper surface 4a due to the weight of the building 1 and the concave shape of the upper surface 4a. Therefore, after the end of the above-mentioned earthquake, the seismic isolation expansion / contraction support means 5 is moved and returned to the center of the upper surface (contact support surface) 4a of the seismic isolation support plate 4 by the weight of the building 1 due to the concave action. The building 1 returns to its original state. still,
The operation of the damper 24 is the same as that of the above-described embodiment, and a description thereof will be omitted.

(4) Fourth Embodiment In the above-described embodiment, an example is shown in which the damper 24 is a cylinder type, but the invention is not necessarily limited to this. For example, as shown in FIGS. 11 and 12, a bellows-like bellows 30 is used as expansion and contraction limiting means instead of the above-described damper 24, and the bellows 30 and the coil spring 25 are used.
May be interposed between the third and fourth joints 18 and 19.

In this embodiment, a fluid supply source (not shown) is connected to one end of the bellows 30 via a normally closed solenoid valve 31, and a tank (not shown) is connected to the other end of the bellows 30 by a normally closed solenoid valve 32. Connected through. These solenoid valves 31 and 3
The operation of the control unit 2 is controlled by a control unit (arithmetic control circuit) 33, and a signal from an external detector 34 is input to the control unit 33. In the present embodiment, an earthquake detector (earthquake detecting means) is used as the external detector 34, and an earthquake detection signal from the external detector 34 is input to the control unit 33. The bellows 30 is filled with a liquid (fluid) such as water or oil.

According to this configuration, the occurrence of an earthquake is detected by the external detector 34 and an earthquake detection signal is input to the control unit 33. The controller 33 keeps the solenoid valves 31 and 32 closed when the input earthquake detection signal is smaller than the set value or when no earthquake detection signal is input from the external detector 34. Therefore, in this case, since the bellows 30 is locked and cannot expand and contract, even if the building 1 is exposed to a strong wind, the seismic isolation device 3 is actuated by the strong wind and the building 1 does not shake.

The controller 33 opens the solenoid valve 32 when the earthquake detection signal input from the external detector 34 is equal to or more than the set value due to the occurrence of the earthquake. As a result, the horizontal vibration of the earthquake is input to the foundation (support) 2 and the foundation 2 vibrates and moves in the horizontal direction. However, since the building 1 is stationary due to the inertial force, it is used for seismic isolation in the first embodiment. The support plate 4 and the base 9 vibrate in the horizontal direction, and the ball 8 of the seismic isolation
Will roll on the upper surface 4a of the support plate 4 for seismic isolation.
As a result, the parallel link mechanism 11 expands and contracts in the direction in which the distance between the first and second joints 16 and 17 increases and decreases, and
Moves horizontally with respect to the seismic isolation support plate 4.

At this time, the bellows 30 expands and contracts against the spring force of the coil spring 25 or due to the spring force, so that the liquid in the bellows 30 is discharged from the solenoid valve 32 and the horizontal input to the base 2. Directional vibration is absorbed. The bellows 30 also exerts a slight moving force in the vibration direction on the building 1, but the building 1 is substantially prevented from vibrating due to the inertial force of the building 1.
Then, with the end of the earthquake, the spring force of the coil spring (return means) 25 causes the parallel link mechanism 11 to return to its original state, and the building 1 to return to its original state.

On the other hand, when the controller 33 determines that the earthquake has ended based on a signal from the external detector 34, the controller 33
1 is opened and a liquid (fluid) such as water or oil is supplied from one end to a bellows 30 from a fluid supply source (not shown) to bleed air from the bellows 30, and then the solenoid valves 31 and 32 are closed to close the bellows 30. To lock. The bellows 30 can be filled with a pressurized gas (pressurized air) as a fluid in addition to the liquid. The return can be achieved by adjusting the amount of fluid in the bellows 30.

(5) Fifth Embodiment In this embodiment, in the configuration shown in FIGS. 11 and 12, the external detector 34 is replaced with an earthquake detector and used as an anemometer to control a wind speed detection signal from the external detector 34. The input is made to the unit 33. Also, a normally closed solenoid valve 31 is used,
The normally opened electromagnetic valve 32 is used, and the electromagnetic valve 31 is normally closed and the electromagnetic valve 32 is opened. Thus, when an earthquake occurs, the bellows 30 expands and contracts, and the horizontal vibration of the earthquake is absorbed as in the fourth embodiment.

When the wind speed signal input from the external detector 4 becomes equal to or more than the set value, the control unit 33 opens the solenoid valve 31 to supply the liquid to the bellows 30 from a fluid supply source (not shown). The inside of the bellows 30 is vented. Since the time required for the air bleeding can be known in advance from the liquid supply amount per unit time, the time required for the air bleeding is defined as the air bleeding time. Then, the control unit 33 opens the electromagnetic valve 32 and measures the air bleeding time from the start of liquid supply. After the lapse of the air bleeding time, the control unit 33 closes the electromagnetic valves 31 and 32 and locks the bellows 30. As a result, the seismic isolation device 3 does not operate, thereby preventing the building 1 from shaking due to strong wind.

Further, when the wind speed signal input from the external detector 4 becomes smaller than the set value, the control unit 33 closes the solenoid valve 31 and opens the solenoid valve 32, thereby turning off the seismic isolation device 3. Operable.

(6) Sixth Embodiment FIGS. 13 and 14 show a sixth embodiment of the present invention. In this embodiment, the structure of the damper 23 of the second embodiment shown in FIGS.
This is an example in which a fluid is supplied to and discharged from the apparatus.

In this embodiment, the piston 2 of the damper 23
The orifice 29 (see FIG. 8B) provided in FIG. 7 is omitted and the fluid chamber 26 is configured as shown in FIG.
A and 26B are communicated with each other through a passage 40, and a normally closed solenoid valve 41 is interposed in the passage 40. This solenoid valve 41
Is controlled to be opened and closed by a control unit 33, and a signal from an external detector 34 is input to the control unit 33. Also in this embodiment, an earthquake detector (earthquake detecting means) is used as the external detector 34, and an earthquake detection signal from the external detector 34 is input to the control unit 33. The fluid chambers 26A and 26B of the cylinder 26 are filled with a liquid (fluid) such as water or oil.

According to this configuration, the occurrence of an earthquake is detected by the external detector 34, and an earthquake detection signal is input to the control unit 33. The control unit 33 keeps the solenoid valve 41 closed when the input earthquake detection signal is smaller than the set value or when there is no input of the earthquake detection signal from the external detector 34. Therefore, in this case, since the bellows 30 is locked and cannot expand and contract, even if the building 1 is exposed to a strong wind, the seismic isolation device 3 is actuated by the strong wind and the building 1 does not shake.

The control unit 33 opens the solenoid valve 41 when the earthquake detection signal input from the external detector 34 is equal to or greater than the set value due to the occurrence of the earthquake. As a result, the horizontal vibration of the earthquake is input to the foundation (support) 2 and the foundation 2 vibrates and moves in the horizontal direction. However, since the building 1 is stationary due to the inertial force, it is used for seismic isolation in the first embodiment. The support plate 4 and the base 9 vibrate in the horizontal direction, and the ball 8 of the seismic isolation
Rolls on the concave upper surface 4a of the support plate 4 for seismic isolation. As a result, the parallel link mechanism 11 expands and contracts in the direction in which the distance between the first and second joints 16 and 17 increases and decreases, and the seismic isolation support means 5 moves in the horizontal direction with respect to the seismic isolation support plate 4.

At this time, the damper 24 expands and contracts, the liquid in the fluid chambers 26A and 26B moves mutually via the passage 40 and the electromagnetic valve 41, and the horizontal vibration input to the foundation 2 is absorbed. . Also, by the action of the damper 24,
Although a moving force in the vibration direction is applied to the building 1 to some extent, the building 1 is almost prevented from vibrating due to the inertial force that tends to stop.

When the hole 8 rolls, the ball 8
As the ball moves toward the edge of the upper surface 4a, the ball 8 tends to return to the center of the upper surface 4a due to the weight of the building 1 and the concave shape of the upper surface 4a. Therefore, after the end of the above-mentioned earthquake, the seismic isolation expansion / contraction support means 5 is moved and returned to the center of the upper surface (contact support surface) 4a of the seismic isolation support plate 4 by the weight of the building 1 due to the concave action. The building 1 returns to its original state.

On the other hand, when the controller 33 determines that the earthquake has ended based on a signal from the external detector 34, the controller 33
1 is closed to lock the extendable state of the damper 24. The bellows 30 can be filled with a pressurized gas (pressurized air) as a fluid in addition to the liquid.

(7) Seventh Embodiment In this embodiment, in the configuration shown in FIGS. 13 and 14, the external detector 34 is replaced with an earthquake detector and used as an anemometer to control a wind speed detection signal from the external detector 34. The input is made to the unit 33. In addition, a normally open electromagnetic valve 41 is used, and the electromagnetic valve 41 is normally kept open. Thus, when an earthquake occurs, the damper 24 expands and contracts, and the horizontal vibration of the earthquake is absorbed as in the fifth embodiment.

When the wind speed signal input from the external detector 4 becomes equal to or greater than the set value, the controller 33 closes the solenoid valve 41 to lock the damper 24 in a state where the damper 24 can expand and contract. As a result, the seismic isolation device 3 does not operate,
The building 1 is prevented from shaking due to strong wind.

Further, when the wind speed signal input from the external detector 4 becomes smaller than the set value, the control unit 33 opens the solenoid valve 41 to make the damper 24 expandable and contractable, and 3 is ready for operation.

(8) Others In the configurations of the first and second embodiments, an example is shown in which only the seismic isolation device 3 having the function of preventing lifting is interposed between the building 1 and the foundation 2. However, the present invention is not limited to this. That is, in addition to the configuration of the first embodiment, a seismic isolation device having no lifting prevention function may be interposed between the building 1 and the foundation 2 and used together. As the seismic isolation device, a well-known seismic isolation bearing device such as a rolling bearing device, a sliding bearing device, an elastic bearing member made of rubber or the like can be used.

Further, the electromagnetic valves 31 and 32 in the fourth and fifth embodiments and the electromagnetic valves in the sixth and seventh embodiments are Although the opening and closing of 41 is controlled by the control unit 33, the present invention is not limited to this.

For example, an earthquake exceeding a predetermined value (for example, vibration 5
The seismic motion detection valve that opens for a predetermined time during the above-mentioned earthquake) is connected to the compression tank of the air compressor, and the control valve that opens and closes with the compressed air supplied from the compression tank to the seismic motion detection valve by opening the seismic motion detection valve. May be provided, and the opening and closing of the solenoid valves 31 and 32 and the solenoid valve 41 may be controlled by the operation of the control valve as in each embodiment.

[0062]

As described above, according to the first aspect of the present invention, the first aspect of the present invention is arranged such that the supporting surface is attached to one of the lower surface of the supported member and the upper surface of the supporting member and the contact supporting surface is directed to the other. A seismic isolation support plate attached to the other of the lower surface of the supported member and the upper surface of the support member and abutting against the contact support surface of the seismic isolation support plate so as to be relatively movable in the horizontal direction. Seismic bearing means, interposed between the supported member and the supporter, to which the seismic isolation support plate is attached, and the seismic isolation bearing means, the seismic isolation bearing means and the seismic isolation support The structure is provided with expansion and contraction support means capable of permitting relative movement in the horizontal direction with respect to the plate, and capable of preventing floating above the supported body. It can absorb the horizontal vibration that is going to be input to the object and is the foundation of the structure. By the lifting of the blocking can be prevented from seismic isolation device may be damaged.

Further, according to the invention of claim 2, the expansion and contraction support means is a parallel link mechanism, and further comprises expansion and contraction restriction means for restricting expansion and contraction of the expansion and contraction support means.
The horizontal vibration of the earthquake to be input to the supported body is absorbed by the parallel link mechanism, and the lift of the supported body is prevented by the parallel link mechanism.

Further, according to the third aspect of the present invention, the expansion / contraction support means is a parallel link mechanism, and is interposed between the support and the supported body so as to be horizontally mounted on the supported body. The structure is provided with a return means that always applies a return force to the original state, so that the horizontal vibration of the earthquake that is going to be input to the supported body is absorbed by the parallel link mechanism, and the lift of the supported body is In addition to being prevented by the mechanism, after the absorption of the horizontal vibration of the earthquake, the supported object is returned to the original state by the return means.

Further, the invention according to claim 4 is characterized in that the expansion and contraction support means is a parallel link mechanism, and the supported body and the support body to which the seismic isolation support plate is attached, and the seismic isolation support means. The two joints at one diagonal of the parallel link mechanism are rotatably held respectively, and the expansion and contraction support means is interposed between a pair of joints at the other diagonal of the parallel link mechanism. Therefore, the horizontal vibration input from the support to the supported member due to the earthquake can be absorbed by the expansion and contraction action and the damping action of the damper. On the other hand, after the end of the earthquake, the parallel link mechanism can be returned to the original state by the return means, and the supported body can be returned to the original state. In addition, since the return means is incorporated in the parallel link mechanism, the parallel link mechanism and the return means can be unitized to improve handling.

Further, according to the fifth aspect of the present invention, the contact supporting surface of the seismic isolation support plate is formed in a concave shape. The means is moved and returned to the center of the abutting support surface of the seismic isolation support plate by the action of the concave surface, and the supported body returns to its original state. With this configuration, it is not necessary to provide a special component such as a spring as the return unit, and the number of components can be reduced.

According to a sixth aspect of the present invention, there is provided a building with a seismic isolation device according to any one of the first to fifth aspects, wherein the supported body is a building, and the supporting body is a foundation of the building. Since the return means is provided on the support means, the expansion / contraction support means is provided at a plurality of locations, and the action direction of the horizontal return force by each of the return means is configured to be different,
Regardless of the direction of the horizontal vibration input from the foundation to the building due to the earthquake, this horizontal vibration can be favorably absorbed.

According to a seventh aspect of the present invention, there is provided a seismic isolation device operation control method, wherein the limiting means for limiting the expansion and contraction of the expansion and contraction support means is controlled by an earthquake detection means or an air flow detection means. Therefore, it is possible to satisfactorily absorb horizontal vibrations that are input from the foundation to the structure when an earthquake occurs, and to set the supported object to be prevented from swaying due to wind or the like.

[Brief description of the drawings]

FIG. 1A is a schematic side view showing the relationship between a seismic isolation device according to the present invention and a building, and FIG. 1B is an explanatory diagram showing the arrangement of the floor of the building and the seismic isolation device in FIG. .

FIG. 2 is a schematic explanatory view more specifically showing the seismic isolation device of FIG. 1 (b).

FIG. 3 is a schematic explanatory view showing an enlarged basic configuration of the seismic isolation device of FIG. 2;

4 is a side view showing a relationship between the seismic isolation device shown in FIG. 3 and a building.

FIG. 5 is a plan view showing the relationship between the parallel link mechanism of FIG. 4 and its mounting portion.

FIG. 6 is an explanatory view taken along a line passing through first, third, and second joints in FIG. 5;

FIG. 7 is an explanatory view taken along a line passing through first, fourth, and second joints in FIG. 5;

8 (a) is a schematic explanatory view in which a return means and a damper are mounted on the seismic isolation device of FIG. 2, and FIG. 8 (b) is a sectional view of the damper and the return means of FIG.

FIG. 9 is an explanatory view of a seismic isolation device showing another embodiment of the present invention.

10 is a cross-sectional view showing the relationship between the seismic isolation support plate and the seismic isolation bearing shown in FIG.

FIG. 11 is a schematic explanatory view of a seismic isolation device showing still another embodiment of the present invention.

FIG. 12 is a sectional view of the damper of FIG.

FIG. 13 is a schematic explanatory view of a seismic isolation device showing still another embodiment of the present invention.

FIG. 14 is a cross-sectional view of the damper shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Building (supported body) 2 ... Foundation (support body) 3 ... Seismic isolation device 4 ... Seismic isolation support plate 4a ... Upper surface (contact support surface) 5 ... Seismic isolation bearing means 11 ・ ・ ・ Parallel link mechanism (expansion / contraction support means) 24 ・ ・ ・ Damper 25 ・ ・ ・ Coil spring (return means)

Claims (7)

[Claims] 1. A seismic isolation support plate attached to one of a lower surface of a supported member and an upper surface of a support member and having a contact support surface facing the other, a lower surface of the supported member and an upper surface of the support member. Seismic isolation bearing means attached to the other of the first and second and abutting movably in a horizontal direction relative to the contact support surface of the seismic isolation support plate; and the seismic isolation support plate of the supported body and the support body. Is interposed between the one with the attached and the seismic isolation bearing means,
A seismic isolation device comprising: telescopic support means capable of allowing relative movement in the horizontal direction between the seismic isolation bearing means and the seismic isolation support plate, and capable of preventing the supported body from floating upward. 2. The seismic isolation device according to claim 1, wherein the expansion / contraction support means is a parallel link mechanism, and further comprises expansion / contraction restriction means for restricting expansion / contraction of the expansion / contraction support means. 3. The expansion / contraction support means is a parallel link mechanism, and is interposed between the support and the supported body to constantly apply a horizontal and original return force to the supported body. The seismic isolation device according to claim 1 or 2, further comprising a return unit. 4. The expansion / contraction support means is a parallel link mechanism, and a pair of the parallel link mechanism is provided between the supported body and the support body to which the seismic isolation support plate is attached and the seismic isolation support means. The two joints at one corner are rotatably held, and the telescopic support means has a damper interposed between a pair of joints on the other diagonal of the parallel link mechanism. The seismic isolation device according to claim 1. 5. The seismic isolation device according to claim 1, wherein a contact support surface of the seismic isolation support plate is concave. 6. In any one of claims 1 to 5,
The supported body is a building, the support is the foundation of the building, and the expansion and contraction support means is provided with return means, the expansion and contraction support means is provided at a plurality of locations, and the return means is provided in a horizontal direction. A building with a seismic isolation device characterized in that the direction of action of the restoring force is changed. 7. A method for controlling the operation of a seismic isolation device according to claim 2, wherein the restriction means for restricting the expansion and contraction of the expansion and contraction support means of the seismic isolation device is controlled by an earthquake detection means or an air flow detection means.