JPH1193456A - Base isolating structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a base isolating structure to prevent the displacement of a base-isolated structure due to high winds, etc., under a normal state, and to surely isolate the base of the base-isolated structure in an earthquake. SOLUTION: A base isolating structure includes a movable member 7 vertically movably and horizontally non-movably mounted on a base-isolated structure 2 and a fixed member 9 having a second irregular part 10 on its upper surface and fixed to a foundation structure 3, the first irregular part 8 of the movable member 7 freely removably fitting into the second irregular part 10. The base isolating structure includes a sensor 11 for detecting shaking, a determination/control means 12 for determining whether or not an earthquake has occurred, a lock/unlock mechanism 13 enabling the movable member 7 to rise in response to an unlock command signal from the determination/control means 12, and a resilient member 14 raising the movable member 7. After an earthquake has ended, the movable member 7 is lowered by a fitted state restoration member 15 to a position where the first irregular part 8 fits into the second irregular part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a seismic isolation structure.

[0002]

2. Description of the Related Art Seismic isolation structures, such as ordinary houses and other relatively small buildings, are provided as seismic isolation structures that are configured to freely roll with respect to a ground-side foundation structure during an earthquake.
2. Description of the Related Art Conventionally, it is known that a plate is fixed to a lower part of a base-isolated structure, a plate is fixed to an upper part of a foundation structure, and a sphere is interposed between upper and lower plate. there were.

[0003]

However, the above-mentioned conventional seismic isolation structure as described above can be used in a normal state other than during an earthquake.
Since the seismic isolated structure can roll over the base structure, there is a disadvantage that the seismic isolated structure may be displaced due to the wind caused by strong winds or vibration caused by the traveling of large vehicles. there were.

Accordingly, the present invention solves the above-mentioned drawbacks, can prevent the displacement of the base-isolated structure due to an external force such as wind force in a normal state, and can prevent the base-isolated structure from being displaced during an earthquake. It is an object of the present invention to provide a seismic isolation structure capable of reliably isolating earthquakes.

[0005]

In order to achieve the above object, a seismic isolation structure according to the present invention includes a seismic isolation support provided between a seismic isolated structure and a foundation structure, and a lower end surface. And a movable member which is attached to the seismic isolated structure so as to be vertically movable and non-movable horizontally, and the first concave / convex portion of the movable member is fitably and detachably fitted. A fixing member having a second concave / convex portion on the upper surface and fixed to the substructure, a sensor for detecting shaking, and a signal sent from the sensor for comparing and calculating to determine whether or not an earthquake has occurred, And a determination / control means for outputting a signal, and in a normal state, holding the movable member at a lowered position where the first concave / convex portion is fitted to the second concave / convex portion, and receiving a release command signal from the determination / control means. A lock / release mechanism that allows the movable member to be lifted; A resilient member that raises the movable member when the lock / release mechanism is released, and a fitting state return mechanism that lowers the movable member to a position where the first concave / convex portion fits into the second concave / convex portion after the end of the earthquake. And with.

Further, a seismic isolation support provided between the base-isolated structure and the base structure, a first uneven portion formed on the upper end surface, and the base structure can move up and down and cannot move horizontally. A movable member attached to the movable member, a fixed member fixed to the seismic isolated structure having a second uneven portion on a lower surface of which the first uneven portion of the movable member fits and removably fits. A sensor for detecting, a discriminating / controlling means for comparing and calculating a signal sent from the sensor to discriminate whether or not it is an earthquake and outputting a release command signal; A lock / release mechanism for holding the movable member at a raised position to be fitted to the second concave / convex portion and for allowing the movable member to descend in response to a release command signal from the determination / control means; Resilient part for lowering the movable member When, those having a fitting state returning mechanism for raising the movable member after the earthquake finished position where the first concave-convex portion is fitted into the second concave-convex portion.

Further, a seismic isolation support provided between the seismic isolated structure and the base structure, and a first uneven portion formed on a lower end surface of the seismic isolated structure, are vertically movable and horizontally movable on the seismic isolated structure. A movable member that is impossible to be attached, a fixed member that has a second uneven portion on the upper surface to which the first uneven portion of the movable member is fitted and removably fitted, and is fixed to the base structure; A sensor for detecting, a discriminating / controlling means for comparing and calculating a signal sent from the sensor to discriminate whether or not it is an earthquake and outputting a release command signal; A lifting / lowering drive mechanism for lowering the movable member in response to a release command signal from the determination / control means and lowering the movable member so as to fit the second concave / convex portion.

In addition, a seismic isolation support provided between the base-isolated structure and the base structure, a first uneven portion formed on an upper end surface, and the base structure can move up and down and cannot move horizontally. A movable member attached to the movable member, a fixed member fixed to the seismic isolated structure having a second uneven portion on a lower surface of which the first uneven portion of the movable member fits and removably fits. A sensor for detecting, a discriminating / controlling means for comparing and calculating a signal sent from the sensor to discriminate whether or not it is an earthquake and outputting a release command signal; A lifting drive mechanism that raises the movable member so as to fit into the second uneven portion and that lowers the movable member in response to a release command signal from the determination / control means.

Also, a seismic isolation support provided between the seismic isolated structure and the base structure, and an elastic covering portion at a lower end, and the seismic isolated structure can move up and down and cannot move horizontally. A movable member attached to the movable member, and a concave portion into which an elastic body covering portion of the movable member is inserted / removably inserted and a number of spheres are rotatably held on an inner peripheral surface, and is fixed to the above-mentioned basic structure. A fixed member, a sensor for detecting shaking,
A determination / control means for comparing and calculating signals sent from the sensor to determine whether or not an earthquake has occurred and to output a release command signal, and to insert the movable member into the concave portion of the elastic member in the normal state. And a lifting drive mechanism for raising the movable member in response to a release command signal from the determination / control means.

[0010] Further, the base-isolated support portion provided between the base-isolated structure and the base structure, and the base structure having an elastic covering portion at an upper end portion are attached to the base structure so as to be able to move vertically and not to move horizontally. A movable member having a concave portion into which an elastic covering portion of the movable member is removably inserted and a plurality of spheres are rotatably held on an inner peripheral surface, and fixed to the seismic isolated structure; A fixing member, a sensor that detects shaking, a comparison / calculation of a signal sent from the sensor, a determination / control unit that determines whether or not an earthquake has occurred and outputs a release command signal,
A lifting drive mechanism for raising the movable member so that the elastic covering portion is inserted into the concave portion in a normal state, and lowering the movable member in response to a release command signal from the determination / control means. Things.

In a plan view, it is preferable that the movable member and the fixed member are respectively provided at at least two places. Restoring means for restoring the base-isolated structure displaced from the base structure due to the earthquake to a normal position where the first uneven portion of the movable member and the second uneven portion of the fixed member can be fitted to each other. It is desirable to have. In addition, the seismically isolated structure that is displaced from the foundation structure due to the earthquake,
Restoring means is provided for restoring to a normal position where the elastic covering portion of the movable member can be inserted into the concave portion of the fixed member.

[0012]

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

FIG. 2 and FIG. 3 are simplified diagrams in which the seismic isolation structure according to the present invention is applied to a general house.
Are the base-isolated supports 4 provided between the base-isolated structure 2 and the base structure 3, and the base-isolated structure 2
Seismic isolated structure fixing parts 5, 5 that can be connected and fixed
And The seismic isolation support 4 includes a lower fixing piece 31 fixed to the base structure 3, an upper fixing piece 32 fixed to the seismic isolated structure 2, and an interposition between the lower fixing piece 31 and the upper fixing piece 32. And a large number of spheres 33, which are rotatably abutted on the upper surface of the lower fixing piece 31 and the lower surface of the upper fixing piece 32.

Thus, as shown in FIG. 1, the seismic isolation structure 1 has a first uneven portion 8 formed on the lower end surface thereof, and is vertically movable and horizontally immovable on the seismic isolated structure 2. A movable member 7 to be attached, a fixed member 9 having a second uneven portion 10 on the upper surface to which the first uneven portion 8 of the movable member 7 is fitted and removably fitted, and which is fixed to the substructure 3; A sensor 11 for detecting shaking, a discriminating / controlling means 12 for comparing and calculating signals sent from the sensor 11 to discriminate whether or not an earthquake has occurred and to output a release command signal; A lock / release mechanism 13 that holds the first concave / convex portion 8 at a lowered position where it is fitted to the second concave / convex portion 10 and that can receive the release command signal from the determination / control means 12 to raise the movable member 7; A resilient member that raises the movable member 7 with the release of the release mechanism 13 14, 14 and a fitted state return mechanism 15 for lowering the movable member 7 to a position where the first uneven portion 8 is fitted to the second uneven portion 10 after the end of the earthquake.

More specifically, as shown in FIGS. 4, 5 and 6, a mounting frame 6 is fixed to the lower surface of the base-isolated structure 2, and the movable member 7 is vertically moved by the mounting frame 6. Hold as possible. The mounting frame 6 has an upper horizontal plate 17 having a small through hole 16 at the center and a lower horizontal plate having a through hole 18 through which the movable member 7 is vertically movably inserted.
19, a spacer member 20 interposed between the upper horizontal plate 17 and the lower horizontal plate 19, and a guide member fixed to the lower surface of the lower horizontal plate 19
21. The resilient member 14 for raising the movable member 7 is composed of a tension spring. The upper end of the resilient member 14 is fixed to the upper horizontal plate 17 of the mounting frame 6 and the lower end is fixed to the movable member 7.

The movable member 7 has a locking hole 22 gradually expanding laterally outward at a position near the lower end. As shown in FIGS. 4 to 8, the first uneven portion 8 of the movable member 7 includes a concentric concave portion 8a and convex portions 8b, 8b.
The second uneven portion 10 of the fixing member 9 includes a concentric concave portion 10a and a convex portion 10b. Further, the first uneven portion 8 and the second uneven portion 10 have inclined surfaces such that the concave portions 8a, 10a gradually become narrower toward the bottom and the convex portions 8b, 10b gradually become narrower toward the distal end. That is, the side surfaces of the concave portions 8a and 10a and the convex portions 8b and 10b are inclined surfaces. At the four corners of the fixing member 9, holes 23 for bolt insertion are provided. Then, as shown in FIG. 3, the movable member 7 and the fixed member 9 are respectively disposed at two positions in plan view. The movable member 7 and the fixed member 9 need only be provided in at least two places, and may be provided in three or more places.

As shown in FIG. 1, FIG. 4, FIG. 5, and FIG. 6, the lock / release mechanism 13 is provided with a lock whose distal end is inserted into the lock hole 22 of the movable member 7 so as to be freely inserted and pulled out. Pin 24
And a lock resilient member 25 that constantly urges the lock pin 24 toward the distal end side, and a cylinder 26 for pulling out the lock pin 24 from the lock hole 22. Cylinder 26
Consists of an air cylinder, and a compressor
Compressed air is supplied via 27.

Next, the fitting state return mechanism 15 is fixed to the upper surface of the upper horizontal plate 17 of the mounting frame 6 and the piston rod 29
Has a cylinder 30 inserted into the small through hole 16 of the upper horizontal plate 17, and compressed air is supplied from a compressor 28 via a solenoid valve 34.

As shown in FIG. 1, the sensor 11 for detecting the shaking comprises an acceleration sensor or a displacement sensor. The sensor 11, the solenoid valves 27 and 34, and the solenoid valve of the restoring means 37 described later in detail are electrically connected to the discrimination / control means 12.

The discriminating / controlling means 12 has a built-in circuit for comparing signals sent from the sensor 11 to determine whether or not an earthquake has occurred, and the shaking detected by the sensor 11 is caused by the initial tremor (P wave) of the earthquake. It is configured to determine whether or not there is, and when it is determined that it is the initial fine movement, a release command signal is sent to the electromagnetic valve 27, and after the earthquake, the electromagnetic valve 34 and the restoring means 37
Then, it is configured to send a fitted state return signal and a seismic isolated structure position restoration signal. More specifically, the discrimination / control means 12 determines the magnitude of the shaking (vibration), the magnitude of the shaking acceleration, the frequency, and the frequency with which the acceleration equal to or higher than a certain set value is detected. It is configured to determine whether or not.

It is preferable to provide a backup power supply so that the seismic isolation structure can operate normally even when a power failure occurs when an earthquake occurs. Also, the discrimination / control means 12
In addition, a sensor 38 for detecting a wind speed (wind force) is electrically connected so that, when an earthquake occurs when the wind speed is high such as during a typhoon, the cancellation / control unit 12 does not output a release command signal. In some cases, it may be set.

Further, as shown in FIG. 3, the seismic isolation structure 1 includes a seismically isolated structure 2 displaced from a base structure 3 due to an earthquake and a first uneven portion 8 of a movable member 7. There is provided restoring means 37 for restoring to a normal position where the second concave and convex portions 10 of the fixing member 9 can be fitted to each other. The restoring means 37 has restoring driving parts 42, 42 arranged at two places in plan view. As shown in FIG. 9, the restoration drive unit 42 includes a square fixed block 39 fixed to the lower surface of the base-isolated structure 2.
And the fixed block 39 attached to the substructure 3
(Air cylinders) each having a piston rod 40 that can contact and separate freely on the four side surfaces of the cylinder 41. The cylinder 41 is provided with a piping and a solenoid valve from a compressor (not shown). Compressed air is supplied via. The fixing block 39 may be fixed to the base structure 3 and the cylinders 41 may be attached to the base-isolated structure 2. Further, the cylinder 41 may be a hydraulic cylinder. In that case, a hydraulic pump may be used instead of the compressor. In some cases, it may be configured to be driven by water pressure.

The piston rod 40 of the cylinder 41
Means that from the normal state until an earthquake occurs and then ends
At the retreat position separated from the fixed block 39, after the end of the earthquake, the solenoid valve receives a restoration signal from the discrimination / control means 12, and the cylinder 41 is operated, so that all the piston rods 40 ...
Is configured to be in the most extended state as shown by the imaginary line in FIG. 9 to return the fixed block 39 to a predetermined restoration position. Thus, the seismically isolated structure 2 can be returned to the predetermined restoration position after the earthquake.

Next, the operation of the seismic isolation structure will be described with reference to the graph of FIG. 10 and the flowchart of FIG. In FIG. 10, reference numeral 43 denotes a signal from the sensor 11;
Is an output signal to the restoring means 37, 45 is an output signal to the lock / release mechanism 13, and 46 is an output signal to the fitted state return mechanism 15.

In the normal state, as shown in FIGS. 1 and 4, the movable member 7 descends so that the first uneven portion 8 is fitted into the second uneven portion 10 of the fixed member 9, and The release mechanism 13 is kept locked. Then, the determination / control means 12 constantly determines whether or not an earthquake has occurred. In this normal state, the base-isolated structure 2 can be stopped so as not to move in the horizontal direction with respect to the base structure 3, and the base-isolated structure 2 can be subjected to strong winds or vibrations caused by running of a large vehicle. 2 can be prevented from shifting. In addition, seismically isolated structure 2
Is pressed in the horizontal direction, the first uneven portion 8 and the second uneven portion 10 are pressed.
The inclined surfaces, the component force F ₁ acts in the upward direction to the movable member 7. Furthermore, the lock pin 24 of the lock / release mechanism 13
The acts horizontal component force F ₂ in the direction passing proximally. Therefore, the lock so that the pin 24 can not be pulled out from the lock hole 22, the horizontal direction component force F _2, the locking resilient member 25
Is canceled by the force of the bullet. Then, a first uneven portion 8 and the inclined angle theta ₁ of the inclined surface of the second concave-convex portion 10, the inclination angle of the tip portion and the inclined surface of the locking hole 22 of the lock pin 24 theta ₂
And the coefficient of friction of those inclined surfaces is such that the above-described component force F _{1 in} the upward direction and the component force F _{2 in the} horizontal direction are as small as possible,
Further, the values are set so that the fitting / removing of the first concave / convex portion 8 and the second concave / convex portion 10 and the fitting / removing of the lock pin 24 into / from the locking hole 22 are smooth.

When an earthquake occurs, the initial tremor (P wave) of the earthquake is detected by the discrimination / control means 12 as shown in FIG. A release command signal is output to the release mechanism 13, and the cylinder 26 is shortened. As a result, as shown in FIG. 5, the lock pin 24 is pulled out from the lock hole 22 of the movable member 7, and the movable member 7 is pulled up by the resilient members 14, 14, so that the first unevenness of the movable member 7 is reduced. The part 8 is the second part of the fixing member 9
Detach from the uneven portion 10. Thereby, the base-isolated structure 2 can slide in the horizontal direction with respect to the base structure 3.
The above operation is completed before the S wave 48 of the earthquake arrives (see FIG. 10).

Thereafter, when the S wave 48 of the earthquake arrives, the seismically isolated structure 2 is seismically isolated by the seismic isolation supports 4. That is,
Since the base-isolated structure 2 can slide in the horizontal direction with respect to the base structure 3, the base-isolated structure 2 does not follow the swing (rolling) of the base structure 3, and the base-isolated structure 2 2 can be reduced.

Thereafter, it is determined whether or not the earthquake has ended and the shaking of the earthquake has not been detected for a predetermined time T.
If not detected, the cylinder 41 of the restoring means 37
... is extended. Thereby, the base-isolated structure 2 is restored to the original position (normal position) with respect to the foundation structure 3. Further, when the shaking of the earthquake is detected within the predetermined time T, the cylinders 41 are kept shortened, and the same judgment is repeated.

Thereafter, as shown in FIG. 6, the cylinder 30 of the fitted state return mechanism 15 is extended, the movable member 7 is lowered, and the cylinder 26 of the lock / release mechanism 13 is extended. As a result, the first uneven portion 8 of the movable member 7 fits into the second uneven portion 10 of the fixed member 9, and the lock pin 24
Is fitted into the locking hole 22 of the movable member 7 to be in a locked state. Then, the cylinders 41 of the restoring means 37 are shortened, and the cylinders 30 of the fitting state return mechanism 15 are further shortened. Then, the determination of whether or not an earthquake has occurred is started again.

As described above, according to this seismic isolation structure,
In the normal state, even if the seismic isolated structure 2 receives a large wind force, the seismic isolated structure 2 is not displaced with respect to the base structure 3 despite the existence of the seismic isolation support portions 4. So that it can be held. In addition, in the event of an earthquake, the seismic isolated structure 2 can be reliably isolated, and the seismic isolated structure 2 can be prevented from being damaged or collapsed. Further, the sensor 11 and the discrimination / control means 12 can prevent a malfunction caused by vibration caused by traveling of the large vehicle.

Although not shown, a fixed member 9 is fixed to the base-isolated structure 2 side, and a movable member 7 is fixed to the foundation structure 3 side.
May be attached. That is, the seismic isolation structure includes a seismic isolation support 4 provided between the seismic isolated structure 2 and the foundation structure 3.
And a movable member 7 having a first uneven portion 8 formed on the upper end surface and being attached to the substructure 3 so as to be vertically movable and non-movable horizontally, and the first uneven portion 8 of the movable member 7 is fitted / removed. A lower member having a second concave / convex portion 10 to be freely fitted and a fixing member 9 fixed to the seismic isolated structure 2, a sensor 11 for detecting shaking, and a signal sent from the sensor 11 are compared to calculate an earthquake. A determination / control means 12 for determining whether or not the movable member 7 is in the normal state;
A lock / release mechanism 13 which holds the concave / convex portion 8 at a raised position where it is fitted to the second concave / convex portion 10 and which can move the movable member 7 down upon receiving a release command signal from the determination / control means 12; A resilient member 14 for lowering the movable member 7 with the release of the mechanism 13;
And a fitting state return mechanism 15 that raises the fitting state to a position where it fits with the second uneven portion 12.

Next, FIG. 12 shows another embodiment of a seismic isolation structure according to the present invention. Movable member 7 attached to seismic structure 2 so as to be vertically movable and not horizontally movable
A fixing member 9 having a second concave / convex portion 10 on its upper surface to which the first concave / convex portion 8 of the movable member 7 fits / removably fits and which is fixed to the substructure 3;
And a determination / control means 12 for comparing the signals sent from the sensor 11 to determine whether or not an earthquake has occurred and for outputting a release command signal, and to move the movable member 7 in the normal state to the first uneven portion 8.
And a lifting drive mechanism 49 that lowers the movable member 7 in response to a release command signal from the determination / control means 12 and lowers the movable member 7 so as to fit into the second uneven portion 10.

The lifting drive mechanism 49 is provided on the upper horizontal plate 17 of the mounting frame 6.
Equipped with a cylinder 50 (air cylinder)
The lower end of the piston rod 51 of the cylinder 50 is connected and fixed to the upper end of the movable member 7. The inclination angle θ of the inclined surface between the first uneven portion 8 and the second uneven portion 10 and the coefficient of friction between the first uneven portion 8 and the second uneven portion 10 indicate that the base-isolated structure 2 receives strong wind. Even so, the value is set so that an upward external force does not act on the movable member 7. Other configurations are the same as those in FIGS.

Next, the operation of the seismic isolation structure 1 will be described with reference to the flowcharts of FIGS. In the normal state, the movable member 7 descends, the first uneven portion 8 fits into the second uneven portion 10 of the fixed member 9, and the lock / release mechanism
Keep 13 locked. Then, the determination / control means 12 constantly determines whether or not an earthquake has occurred.

When an earthquake occurs, a release command signal is output from the discrimination / control means 12 to the solenoid valve 52 of the elevation drive mechanism 49 immediately after the initial fine movement occurs, and the cylinder 50 is shortened. As a result, the movable member 7 rises, and the movable member 7
The first uneven portion 8 is detached from the second uneven portion 10 of the fixing member 9, so that the base-isolated structure 2 can slide in the horizontal direction with respect to the foundation structure 3.

Thereafter, when the S wave of the earthquake arrives, the base-isolated structure 2 is isolated from the base-isolated supports 4 (see FIGS. 2 and 3).
reference). Thereafter, it is determined whether or not the earthquake has ended and the shaking of the earthquake has not been detected for a predetermined time, and if not detected, the cylinders 41 of the restoring means 37 are extended. As a result, the base-isolated structure 2 is
Is restored to the original position (normal position). afterwards,
A fitting command signal is output from the determination / control means 12 to the electromagnetic valve 52 of the lifting drive mechanism 49, and the cylinder 50 is extended. As a result, the movable member 7 descends, and the first uneven portion 8 is fitted to the second uneven portion 10 of the fixed member 9. Thereafter, the cylinders 41 of the restoring means 37 are shortened. Thereafter, the determination of whether or not an earthquake has occurred is started again.

As described above, according to the seismic isolation structure 1, the structure can be simplified, the wind sway can be prevented in a normal state, and the seismic isolation during an earthquake can be reliably performed.

Although not shown, a fixed member 9 is fixed to the base-isolated structure 2 side, and a movable member 7 is fixed to the foundation structure 3 side.
May be attached. That is, the seismic isolation structure is provided between the seismic isolated structure 2 and the foundation structure 3.
And a movable member 7 having a first uneven portion 8 formed on the upper end surface and being attached to the substructure 3 so as to be vertically movable and non-movable horizontally, and the first uneven portion 8 of the movable member 7 is fitted / removed. A lower member having a second concave / convex portion 10 to be freely fitted and a fixing member 9 fixed to the seismic isolated structure 2, a sensor 11 for detecting shaking, and a signal sent from the sensor 11 are compared to calculate an earthquake. A determination / control means 12 for determining whether or not the movable member 7 is in the normal state;
An elevation drive mechanism 49 that raises and lowers the uneven portion 8 so as to fit into the second uneven portion 10 and that lowers the movable member 7 in response to a release command signal from the determination / control means 12.

In the present invention, the first uneven portion 8 and the second
The shape of the uneven portion 10 is not limited to the above-described embodiment. For example, as shown in FIGS. 14 and 15, a plurality of quadrangular pyramid-shaped protrusions 53 are formed on the movable member 7 and the fixed member 9. It is also preferable that the first uneven portion 8 and the second uneven portion 10 are formed.

As shown in FIG. 16, the restoring drive section 42 includes a fixed block 39 having an equilateral triangular shape fixed to the lower surface of the base-isolated structure 2, and three side faces of the fixed block 39. And a total of three cylinders 41 having a piston rod 40 capable of contacting and separating freely.

The cylinder 2 of the lock / release mechanism 13
6, Cylinder 30 of fitting state return mechanism 15, lifting drive mechanism 4
The nine cylinders 50 and the like may be hydraulic cylinders.
In that case, a hydraulic pump may be used instead of the compressor 28. In some cases, it may be configured to be driven by water pressure. It is also possible to use another structure as the seismic isolation support 4.

Next, FIG. 17 shows a large number of small spheres 57 that rollably contact the outer peripheral surface of the movable member 7 inside the guide member 21 in order to smoothly slide the movable member 7 in the vertical direction. .. Indicate bearing members 58, 58 arranged in the circumferential direction. 59, 59 are retaining rings for retaining the bearing members 58, 58, and the retaining rings 59, 59 are guide members.
It is screwed into female screw portions 60, 60 formed on the inner peripheral surface of 21.
With this, even if strong winds are blowing when an earthquake occurs,
The movable member 7 can be raised without fail.

FIG. 18, FIG. 19 and FIG. 20 show a main part of another embodiment of the present invention. The movable member 7 has an elastic body covering portion 56 at the lower end and a non-exposed member. Seismic structure 2
It can be moved up and down and not horizontally. Specifically, an elastic body 62 such as urethane rubber is bonded to the outer peripheral surface of the lower end of the metal movable member main body 61 to form the elastic body covering portion 56. The elastic body 62 may use rubber or resin other than urethane rubber.

The fixed member 9 is an elastic covering portion of the movable member 7.
56 are inserted so as to be able to be inserted / removed, and a plurality of spherical bodies 54 are provided on the inner peripheral surface thereof with a concave portion 55 which is rotatably held, and is fixed to the substructure 3 not shown. Specifically, the fixing member main body 63
A circular recess 64 formed in a plan view is formed on the upper surface of the bearing, and a bearing comprising a mounting ring 65 and a number of spheres 54 rotatably mounted on the inner peripheral surface side of the mounting ring 65 in the concave 64. Body 66
Are fixed to form a concave portion 55.

The outer diameter A of the elastic covering portion 56 is set to be equal to or slightly smaller than the inner diameter B of the concave portion 55. Others are the same as those described in FIG. As a result, after the earthquake occurs, the movable member 7 rises, and after the earthquake ends and the restoring means 37 (not shown) operates,
Due to the error of the restoring means 37, as shown in FIG. 20, even if the movable member 7 is displaced with respect to the concave portion 55, the elastic body 62 of the elastic body covering portion 56 is elastically contacted with the spherical body 54 while rolling. It is deformed and smoothly inserted into the concave portion 55. Further, in the normal state, even if a strong wind blows, no force in the ascending direction acts on the movable member 7, so that the movable member 7 does not come off the concave portion 55 unexpectedly.

Although not shown, a fixed member 9 is fixed to the base-isolated structure 2 side, and a movable member 7 is fixed to the foundation structure 3 side.
May be attached. That is, the seismic isolation structure includes a seismic isolation support 4 provided between the seismic isolated structure 2 and the foundation structure 3.
And a movable member 7 attached to the substructure 3 having an elastic covering portion 56 at the upper end so as to be vertically movable and not horizontally movable.
The elastic member covering portion 56 of the movable member 7 is inserted so as to be able to be inserted and detached, and the inner peripheral surface has a concave portion 55 in which a large number of spheres 54 are rotatably held. A fixed member 9 to be detected, a sensor 11 for detecting shaking, a comparison / calculation of a signal sent from the sensor 11, a determination / control means 12 for determining whether or not an earthquake has occurred and outputting a release command signal, and a normal state. An elevating drive mechanism 49 that raises the movable member 7 so that the elastic body covering portion 56 is inserted into the concave portion 55 and lowers the movable member 7 in response to a release command signal from the determination / control means 12 is provided.

[0047]

Since the present invention is configured as described above, the following effects can be obtained.

According to the seismic isolation structure of the first aspect, in the normal state, even if the seismic isolated structure 2 receives a large wind force,
Despite having the seismic isolation support 4, the seismic isolated structure 2 can be held so as not to be displaced with respect to the base structure 3. In addition, in the event of an earthquake, the seismic isolated structure 2 can be reliably isolated, and the seismic isolated structure 2 can be prevented from being damaged or collapsed.
In addition, the sensor 11 and the discrimination / control means 12 can prevent malfunction due to vibration caused by traveling of a large vehicle, construction, or the like. According to the seismic isolation structure of the second aspect, in the normal state, even if the seismic isolated structure 2 receives a large wind force, the base structure 3 is provided despite the presence of the seismic isolation support 4.
, The seismically isolated structure 2 can be held so as not to be displaced. In addition, in the event of an earthquake, the seismic isolated structure 2 can be reliably isolated, and the seismic isolated structure 2 can be prevented from being damaged or collapsed. In addition, the sensor 11 and the discrimination / control means 12 can prevent malfunction due to vibration caused by traveling of a large vehicle, construction, or the like.

According to the seismic isolation structure of the third aspect, in the normal state, even if the seismic isolated structure 2 receives a large wind force,
Despite having the seismic isolation support 4, the seismic isolated structure 2 can be held so as not to be displaced with respect to the base structure 3. In addition, in the event of an earthquake, the seismic isolated structure 2 can be reliably isolated, and the seismic isolated structure 2 can be prevented from being damaged or collapsed.
In addition, the sensor 11 and the discrimination / control means 12 can prevent malfunction due to vibration caused by traveling of a large vehicle, construction, or the like. Further, the structure is simple, construction is easy, and maintenance is easy. According to the seismic isolation structure of the fourth aspect, in the normal state, the seismic isolated structure 2
Even if a large wind is received, the seismically isolated structure 2 can be held so as not to be displaced with respect to the foundation structure 3 despite the presence of the seismic isolation support 4. And when an earthquake occurs,
The seismically isolated structure 2 can be reliably isolated, and damage or collapse of the seismic isolated structure 2 can be prevented. In addition, the sensor 11 and the discrimination / control means 12 can prevent malfunction due to vibration caused by traveling of a large vehicle, construction, or the like. Further, the structure is simple, construction is easy, and maintenance is easy.

According to the seismic isolation structure of the fifth aspect, in the normal state, even if the seismic isolated structure 2 receives a large wind force,
Despite having the seismic isolation support 4, the seismically isolated structure 2 can be reliably held so as not to be displaced with respect to the foundation structure 3. When an earthquake occurs, the seismically isolated structure 2 can be reliably isolated, and damage or collapse of the seismically isolated structure 2 can be prevented. Furthermore, the sensor 11 and the discrimination / control means 12 can prevent malfunction due to vibration caused by running of a large vehicle or construction. Further, the structure is simple, construction is easy, and maintenance is easy. According to the seismic isolation structure of the sixth aspect, in the normal state, even if the seismic isolated structure 2 receives a large wind force, the seismic isolation support portion 4 has the base isolation structure 4 despite the presence of the seismic isolation support 4. On the other hand, the seismic isolated structure 2 can be securely held so as not to be displaced. When an earthquake occurs, the seismically isolated structure 2 can be reliably isolated.
Can be prevented from being damaged or collapsed. In addition, sensor 11
And the control means 12 can prevent a malfunction caused by vibrations caused by running of a large vehicle or construction. Further, the structure is simple, construction is easy, and maintenance is easy.

According to the seismic isolation structure of the seventh aspect, in the normal state, the seismic isolation structure 2 can be fixed so as not to be displaced by a larger wind force or vibration other than an earthquake. . According to the seismic isolation structure of claim 8, even if the seismic isolated structure 2 is displaced with respect to the foundation structure 3 after the earthquake, the seismic isolated structure 2 is returned to the original predetermined position. be able to. Therefore, the first uneven portion 8 of the movable member 7 can be securely fitted to the second uneven portion 10 of the fixed member 9. According to the seismic isolation structure of claim 9, even if the seismic isolated structure 2 is displaced with respect to the foundation structure 3 after the earthquake, the seismic isolated structure 2 is returned to the original predetermined position. be able to. Therefore, the elastic body covering portion 56 of the movable member 7 is
Can be reliably inserted.

[Brief description of the drawings]

FIG. 1 is a block diagram of a seismic isolation structure according to the present invention.

FIG. 2 is a front view showing an example of a construction state of the seismic isolation structure according to the present invention.

FIG. 3 is a simplified plan view.

FIG. 4 is an enlarged sectional view of a main part in a normal state.

FIG. 5 is an explanatory diagram of an operation of a main part.

FIG. 6 is an explanatory diagram of an operation of a main part.

FIG. 7 is a bottom view of the movable member.

FIG. 8 is a plan view of a fixing member.

FIG. 9 is a simplified plan view of a main part of the restoration means.

FIG. 10 is a graph.

FIG. 11 is a flowchart.

FIG. 12 is a block diagram of another embodiment.

FIG. 13 is a flowchart.

FIG. 14 is an enlarged sectional view of another movable member and another fixed member.

FIG. 15 is an enlarged plan view of a main part.

FIG. 16 is an enlarged plan view of a main part.

FIG. 17 is an enlarged sectional view of another movable member and its vicinity.

FIG. 18 is an enlarged cross-sectional side view of a main part of another embodiment.

FIG. 19 is an enlarged sectional plan view of a main part.

FIG. 20 is an operation explanatory diagram.

[Explanation of symbols]

 2 seismic isolated structure 3 foundation structure 4 seismic isolation support 7 movable member 8 first uneven part 9 fixed member 10 second uneven part 11 sensor 12 discriminating / control means 13 lock / release mechanism 14 elastic member 15 fitting State return mechanism 37 Restoring means 49 Lifting drive mechanism 54 Sphere 55 Recess 56 Elastic body coating

Claims (9)

[Claims] 1. A base-isolated support 4 provided between a base-isolated structure 2 and a base structure 3, and a first uneven portion 8 formed on a lower end surface of the base-isolated structure 2. A movable member 7 movably mounted so as not to be horizontally movable;
Second concave / convex portion into which the first concave / convex portion 8 is fitted / removably fitted
A fixing member 9 having an upper surface 10 and fixed to the substructure 3, a sensor 11 for detecting shaking, and a signal transmitted from the sensor 11 are compared to determine whether or not an earthquake has occurred and to release a command. Discrimination / control means 12 for outputting a signal
In the normal state, the movable member 7 is held at the lowered position where the first concave / convex portion 8 is fitted to the second concave / convex portion 10 and the movable member 7 receives the release command signal from the determination / control means 12 and receives the release command signal. , A resilient member 14 for raising the movable member 7 with the release of the lock / release mechanism 13, and a first uneven portion 8 after the end of the earthquake. A seismic isolation structure comprising: a fitting state return mechanism 15 for lowering a fitting position to a position fitted to the second uneven portion 10. 2. A base-isolated support portion 4 provided between a base-isolated structure 2 and a base structure 3, and a first uneven portion 8 formed on an upper end surface of the base-isolated structure. And a movable member 7 attached to the movable member 7 so as not to be horizontally movable, and a second uneven portion 10 to which the first uneven portion 8 of the movable member 7 is fitted and detached.
And a sensor 11 for detecting shaking, and a signal transmitted from the sensor 11 is subjected to a comparison operation to determine whether or not an earthquake has occurred and to release the signal. Discrimination / control means 12 for outputting a command signal
In the normal state, the movable member 7 is held at the raised position where the first uneven portion 8 is fitted to the second uneven portion 10, and the movable member 7 receives the release command signal from the determination / control means 12, and And a resilient member 14 for lowering the movable member 7 when the lock / release mechanism 13 is released, and a first concave / convex portion 8 after the end of the earthquake. And a fitted state return mechanism 15 that raises the fitting state to a position fitted to the second uneven portion 10. 3. A seismic isolation support portion 4 provided between the seismic isolated structure 2 and the foundation structure 3, and a first uneven portion 8 formed on a lower end surface of the seismic isolated structure 2. A movable member 7 movably mounted so as not to be horizontally movable;
Second concave / convex portion into which the first concave / convex portion 8 is fitted / removably fitted
A fixing member 9 having an upper surface 10 and fixed to the substructure 3, a sensor 11 for detecting shaking, and a signal transmitted from the sensor 11 are compared to determine whether or not an earthquake has occurred and to release a command. Discrimination / control means 12 for outputting a signal
In the normal state, the movable member 7 is lowered so that the first uneven portion 8 is fitted into the second uneven portion 10, and the movable member 7 is received in response to a release command signal from the determination / control means 12. A seismic isolation structure, comprising: an elevating drive mechanism 49 for ascending. 4. A base-isolated support portion 4 provided between a base-isolated structure 2 and a base structure 3, and a first uneven portion 8 formed on an upper end surface of the base-isolated structure. And a movable member 7 attached to the movable member 7 so as not to be horizontally movable, and a second uneven portion 10 to which the first uneven portion 8 of the movable member 7 is fitted and detached.
And a sensor 11 for detecting shaking, and a signal transmitted from the sensor 11 is subjected to a comparison operation to determine whether or not an earthquake has occurred and to release the signal. Discrimination / control means 12 for outputting a command signal
In the normal state, the movable member 7 is raised so that the first uneven portion 8 is fitted into the second uneven portion 10, and the movable member 7 is received in response to a release command signal from the determination / control means 12. A seismic isolation structure, comprising: an elevating drive mechanism 49 for lowering the arm. 5. A seismic isolation support 4 provided between the base-isolated structure 2 and the base structure 3, and an elastic covering portion 56 at a lower end, and the base-isolated structure 2 can move up and down. A movable member 7 mounted so as not to move horizontally, and a concave portion into which an elastic covering portion 56 of the movable member 7 is inserted so as to be able to be inserted and removed, and a number of spheres 54 are rotatably held on the inner peripheral surface. A fixing member 9 having 55 and fixed to the base structure 3, a sensor 11 for detecting shaking, and a signal sent from the sensor 11 are compared to determine whether or not an earthquake has occurred and to output a release command signal. The discriminating / controlling means 12 which outputs the movable member 7 in a normal state so that the elastic body covering portion 56 is inserted into the concave portion 55, and upon receiving a release command signal from the discriminating / controlling means 12, A lifting drive mechanism 49 for raising the movable member 7. Seismic isolation structure to be. 6. The base-isolated support 4 provided between the base-isolated structure 2 and the base structure 3, and the base structure 3 having an elastic covering portion 56 at the upper end thereof can be moved vertically and horizontally. It has a movable member 7 that is impossible to be attached, and a concave portion 55 into which an elastic body covering portion 56 of the movable member 7 is inserted so as to be able to be inserted / removed and a large number of spheres 54 are rotatably held on the inner peripheral surface. A fixing member 9 fixed to the base-isolated structure 2, a sensor 11 for detecting shaking, and a signal sent from the sensor 11 are compared to determine whether or not an earthquake has occurred and to output a release command signal. The movable member 7 is raised in a normal state so that the elastic covering portion 56 is inserted into the concave portion 55, and the movable member 7 is moved in response to a release command signal from the determination / control device 12. Elevating drive mechanism 49 for lowering member 7
And a seismic isolation structure comprising: 7. A movable member 7 and a fixed member 9 when viewed in plan.
The seismic isolation structure according to claim 1, 2, 3, 4, 5, or 6, wherein each is disposed at at least two places. 8. The seismically isolated structure 2 displaced from the base structure 3 due to the earthquake can be fitted into the first uneven portion 8 of the movable member 7 and the second uneven portion 10 of the fixed member 9 mutually. And a restoring means 37 for restoring to a normal position.
The seismic isolation structure according to 2, 3, or 4. 9. The seismically isolated structure 2 displaced with respect to the base structure 3 due to the earthquake is attached to the elastic covering portion 56 of the movable member 7.
The seismic isolation structure according to claim 5 or 6, further comprising restoring means (37) for restoring to a normal position where the member can be inserted into the concave portion (55) of the fixing member (9).