JP2001263414A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device which simplifies the structure thereof, reduces the cost, and has a braking device of high responsiveness. SOLUTION: This base isolation device comprises a support mechanism portion 6 which is provided between a base side member 4 and a structure side member 2 to permit the relative motion along a predetermined plane, a braking portion 11 as a braking means to brake the relative motion of the base side member 4 to the structure side member 2 by the viscous force applied to the base side member 4 and the structure side member 2, and a control circuit to operate the braking portion 11 by controlling the viscous force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator suitable for structures such as houses and small buildings.

[0002]

2. Description of the Related Art Heretofore, as a vibration isolating device for ground vibration of a large structure such as a building, there is known a vibration isolating device which obtains a vibration isolating effect by interposing a vibration isolating body between a base and a building. . As the above-mentioned vibration isolator, for example, a structure in which a hard plate such as a metal plate and a soft plate such as rubber are alternately laminated is known, and is applied to a large-scale structure such as a low-rise building or a bridge. I have. By the way, the rigidity of an elastic body such as rubber forming a soft plate used for a vibration isolator having a laminated structure in which a hard plate and a soft plate are stacked as described above is relatively large to be applied to a large structure. . For this reason, in order to obtain an effective vibration isolating effect by applying the above-described laminated vibration isolator to a structure such as a private house or a small building, the rigidity of the elastic body such as rubber must be reduced by the mass of the structure. It is necessary to make it small according to. However, when the rigidity of the elastic body is reduced, there is a problem that the vibration is easily generated by an external force such as wind force acting on the structure, and the stability of the structure is easily deteriorated.

[0003]

Instead of the vibration isolator having a laminated structure as described above, a rolling element such as a sphere or a roller is interposed between the structure and a base on which the structure is installed. There are known vibration isolation devices that allow horizontal relative movement between a structure and a base to protect the structure from vibrations such as earthquakes. By preventing the body from rolling, the structure is prevented from being destroyed or damaged.
In the above-described vibration isolator, since the structure and the base are not basically restrained, when an external force such as wind acts on the structure, the structure moves with respect to the base, and the structure is destroyed.
A brake device is required to restrain the structure and the base because it may be damaged.

Conventionally, as a brake device of the above-mentioned vibration isolation device, for example, in normal times when vibration such as an earthquake does not occur, the structure and the base are restrained, and the restraint is released in response to the occurrence of the vibration such as an earthquake. Type that does not restrain the structure and the base when vibration such as an earthquake does not occur, and that restrains the structure and the base only when external force such as wind acts on the structure And is known. These brake devices are required to be low-cost and have a simple structure in order to be applied to houses, etc., but in addition to these requirements, in addition to vibrations such as sudden earthquakes and gusts, And high responsiveness that can respond immediately.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a vibration isolator having a brake device having a relatively simple structure, a low cost, and a high responsiveness. The purpose is to do.

[0006]

SUMMARY OF THE INVENTION A vibration isolator according to the present invention is provided between a base and a structure, and supports the relative movement between the base and the structure along a predetermined plane. When,
A braking unit that applies a viscous force between the base and the structure to brake the relative movement between the base and the structure; and a control unit that controls the viscous force to operate the braking unit. .

Further, the vibration isolator of the present invention has a base-side vibration detecting means for detecting a vibration acting on the base side, and the braking means is configured to control the relative vibration in a state where the vibration does not act on the base side. The movement is braked by the viscous force, and the control means reduces the viscous force and releases the braking by the braking means in response to the detection of the vibration toward the base by the base-side vibration detecting means.

[0008] The braking means is provided on the structure side and has a first opposing portion provided with a first opposing surface opposing the base side, and is provided on the base side and is provided on the first opposing surface. A second surface having a second opposing surface opposing at a predetermined gap;
An opposing portion, a magnetic viscous fluid interposed in a gap between the first opposing surface and the second opposing surface, a permanent magnet for applying a constant magnetic field to the magnetic viscous fluid, and a magnetic field of the permanent magnet. It has an electromagnet capable of generating a magnetic field in a direction to cancel, and a power supply for supplying a current to the electromagnet.

[0009] Preferably, the second opposing portion has an accommodating recess for accommodating the magnetic viscous fluid whose bottom surface constitutes the second opposing surface, and the first opposing portion has a top surface having the top surface. First
And a protruding portion protruding with respect to the housing recess forming the opposing surface, and the permanent magnet and the electromagnet are provided on the protruding portion.

[0010] More preferably, the apparatus further comprises structure-side vibration detecting means for detecting the vibration on the structure side, wherein the control means is provided on the basis of detection signals from the structure-side vibration detecting means and the base-side vibration detecting means. , Controlling the operation of the braking means.

Further, the vibration isolator of the present invention has an external force detecting means for detecting an external force acting on the structure side, and the braking means has a function of detecting the relative movement of the relative movement when the external force does not act on the structure side. The braking is released, and the control means raises the viscous force of the braking means to brake the relative movement in response to the detection of the external force by the external force detecting means.

[0012] The braking means is provided on the structure side and has a first opposing portion provided with a first opposing surface opposing the base side, and is provided on the base side and is provided on the first opposing surface. A second surface having a second opposing surface opposing at a predetermined gap;
, A magnetic viscous fluid interposed in a gap between the first opposing surface and the second opposing surface, an electromagnet capable of applying a magnetic field to the magnetic viscous fluid, and a power supply for supplying a current to the electromagnet And

In the vibration isolator according to the present invention, basically, when the base side vibrates due to an earthquake or the like, the structure is installed on the base via the support means. A vibration isolating effect can be obtained without doing so. In addition, the relative movement between the base and the structure is damped by viscous force, and the control means changes the viscous force, whereby the relative movement between the base and the structure is braked and released.

In the braking means according to the first aspect of the present invention, the structure is braked by viscous force in a state where vibration such as an earthquake does not act on the base side. When a vibration such as an earthquake occurs in a state where the structure is braked, for example, a base-side vibration detection unit including a seismometer detects the vibration. The control means responds to the detection of the vibration by the base-side vibration detection means,
Release the braking force by reducing the viscous force. Thereby, relative motion is started by vibration such as an earthquake, and the structure is isolated. Specifically, the viscous force is applied to the structure and the base by using the magnetic viscous fluid, and the viscous force is maintained in a high state by constantly applying a magnetic field to the magnetic viscous fluid by the permanent magnet. The relative movement between the base and the structure is damped.
When a magnetic field is applied from the electromagnet to the magnetic viscous fluid in a direction to cancel the magnetic field of the permanent magnet in response to the detection of the vibration by the base-side vibration detecting means, the viscosity of the magnetic viscous fluid immediately decreases, and the base and the structure Is released.

Further, in the braking means according to the second aspect of the present invention, the structure is not braked in a state where vibration such as an earthquake does not act on the base, and the relative mobility is increased when the vibration such as an earthquake occurs. To be isolated. When an external force such as wind acts on the structure,
The external force is detected by the external force detecting means, and in response to the detection, the control means increases the viscous force to brake the structure. As a result, even when an external force such as wind acts on the structure,
The structure does not move. Specifically, a viscous force is applied to the structure and the base by using a magnetic viscous fluid, but in a state where vibration such as an earthquake does not act on the base, no magnetic field is applied to the magnetic viscous fluid, Viscous force is small. When the external force detecting means detects the external force and a magnetic field is applied from the electromagnet to the magnetic viscous fluid, the viscosity of the magnetic viscous fluid immediately increases, and the base and the structure are braked.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a configuration diagram showing a schematic configuration of a vibration isolation device according to an embodiment of the present invention, where (a) is a side view and (b) is a plan view. In FIG. 1, for example, a vibration isolation device according to the present embodiment is provided to face a structure side member 2 and a structure side member 2 constituting a bottom surface of a structure such as a house or a small building, and is provided on the ground GR. It includes a support mechanism 6 and a brake 11 provided between the base member 4 and the base member 4. Note that the support mechanism 6 constitutes the support means of the present invention, and the brake section 11 constitutes the brake means of the present invention.

In FIG. 1, the support mechanism 6 supports the structure-side member 2 and allows relative movement of the structure-side member 2 and the base-side member 4 along a horizontal plane. Here, FIG. 2 is a sectional view showing a schematic structure of the support mechanism 6. As shown in FIG. 2, the support mechanism unit 6 includes a plurality of rolling elements RL that can roll with respect to the structure-side member 2 and the base-side member 4, for example, a sphere, a column, and the like. As described above, since the rolling element RL is capable of rolling with respect to both the structure-side member 2 and the base-side member 4, for example, the base-side member 4 is moved by arrows B <b> 1 and B <b> 2 due to an earthquake or the like.
When the base member 4 and the structural body member 2
Relative to the base member 4
Is not transmitted, or even if transmitted, the force is very small.

Further, when an external force such as wind power acts on a structure such as a house provided on the structure-side member 2, the structure-side member 2
Moves in the directions of arrows A1 and A2 with respect to the base member 4. If the structure-side member 2 moves in the directions of the arrows A1 and A2 with the base-side member 4 stopped, the structure such as a house provided on the structure-side member 2 may be broken or damaged.

The brake section 11 brakes the movement of the structure-side member 2 in a state where the base member 4 is stopped. The brake portions 11 are provided at four corners of the structure-side member 2 and the opposing base-side member 4, and the relative movement of the structure-side member 2 with respect to the base-side member 4 when no vibration is applied to the base-side member 4. Is braked by viscous force.

FIGS. 3A and 3B are views showing the structure of the brake unit 11, wherein FIG. 3A is a sectional view, and FIG. 3B is a plan view as viewed from the direction of arrow D in FIG. As shown in FIG. 3, the brake portion 11 is provided on a surface of the structural member 2 facing the base member 4, and at a position facing the protrusion member 16 of the base member 4. And an opposing member 13.

The projecting member 16 is, for example, a disk-shaped member formed of a ferromagnetic material. This protruding member 16
A permanent magnet 18 is provided at the center on the side of the facing surface 16a facing the facing member 13, and a coil 17 is provided around the permanent magnet 18. The opposing surface 16a, which is the top surface of the protruding member 16, and the surface 18 of the permanent magnet 18
“a” forms a predetermined gap “d” with the opposing surface 13 a of the opposing member 13.

The facing member 13 is made of, for example, a ferromagnetic material, and has a housing recess 13b formed by an outer peripheral wall 13c. A predetermined amount of the magnetic viscous fluid MR is accommodated in the accommodation recess 13b of the facing member 13. This magnetic viscous fluid MR is interposed in a gap d between the facing surface 16a of the protruding member 16 and the facing surface 13a which is the bottom surface of the housing recess 13b of the facing member 13.

The magnetic viscous fluid MR is, for example, a fluid in which microparticles of iron or an iron-based alloy are coated with a surfactant and dispersed in water, silicon oil or hydrocarbon-based oil. This magnetic viscous fluid MR has a structure in which the above-mentioned fine particles are connected in a chain shape under a magnetic field and have a structure against external force, so that the apparent viscosity changes.

A diaphragm 15 is provided between the side surface of the protruding member 16 and the upper surface of the wall portion 13c of the opposing member 13. The diaphragm 15 is provided with a magnetic viscous fluid MR accommodated in the accommodating recess 13b. The space between the protruding member 16 and the wall 13c is sealed so as not to leak out of the outside 13b. Further, when the protruding member 16 and the opposing member 13 move relative to each other, the diaphragm 15 is elastically deformed in response to the relative movement, and allows the relative movement between the protruding member 16 and the opposing member 13.

The surface 18a of the permanent magnet 18 is in contact with the magnetorheological fluid MR, and applies a constant magnetic field to the magnetorheological fluid MR. As a result, the magnetic viscous fluid MR enters a high viscosity state.

The coil 17 forms an electromagnet with the projecting member 16. When a current in a predetermined direction is supplied to the coil 17, a magnetic field is generated in a direction to cancel the magnetic field of the permanent magnet 18.

The coil 17, the permanent magnet 18, the magnetic viscous fluid MR, the opposing member 13 made of a ferromagnetic material, and the projecting member 16 made of a ferromagnetic material constitute a magnetic circuit. That is, in a state where no current is supplied to the coil 17, the permanent magnet 18
Is generated, the magnetic viscous fluid MR interposed in the gap d is in a high viscous state, and acts so as to hinder the relative movement between the projecting member 16 and the opposing member 13, ie,
Acts as a brake.

When a current is supplied to the coil 17, the coil 1
The electromagnet constituted by 7 and the projecting member 16 generates a magnetic field so as to cancel the magnetic field of the permanent magnet 18. As a result, the magnetic viscous fluid MR interposed in the gap d becomes in a low viscosity state, and the state in which the relative movement between the projecting member 16 and the opposing member 13 is braked is released.

FIG. 4 is a configuration diagram showing a configuration of a control system of the vibration isolator according to the present embodiment. In FIG. 4, the control system of the vibration isolation device according to the present embodiment includes a power supply 32 that supplies a current to the coil 17, a control circuit 31 that controls supply / cutoff of a current from the power supply 32 to the coil 17, 33 in total,
An accelerometer 34 is provided.

The seismometer 33 is installed, for example, on the base member 4, detects vibration such as an earthquake acting on the base member 4, and outputs a detection signal 33 s to the control circuit 31. The seismometer 33 corresponds to a specific example of the base-side vibration detection means of the present invention.

The accelerometer 34 is provided, for example, on a structure such as a house provided on the structural member 2, detects acceleration (vibration) of the structural member 2, and outputs a detection signal 34 s to the control circuit 31. . The accelerometer 34 corresponds to a specific example of the structure-side vibration detecting means of the present invention.

The control circuit 31 detects the detection signal 3 of the seismometer 33
3s or the detection signal 33 of the seismometer 33
Based on s and the detection signal 34s of the accelerometer 34, the supply / cutoff of the current from the power supply 32 to the coil 17 is controlled, and the viscosity of the magnetic viscous fluid MR is controlled. That is, the control circuit 31 reduces the apparent viscosity of the magnetic viscous fluid MR by supplying a current to the coil 17, and the coil 1
The interruption of the current to 7 increases the apparent viscosity of the magnetic viscous fluid MR.

Next, an example of the operation of the vibration isolator having the above configuration will be described. In a normal state in which vibration such as an earthquake does not occur, the magnetic viscous fluid MR interposed in the gap d between the protruding member 16 of the brake unit 11 and the opposing member 13 is in a high viscous state due to the magnetic field of the permanent magnet 18, Part 1
Numeral 1 brakes the relative movement between the structural member 2 and the base member 4.

In the above-described state, for example, even when an external force such as wind acts on a house or the like provided on the structural member 2, the structural member 2 is braked by the brake portion 11. The house does not move with respect to the member 4, so that the house does not slide or break or be damaged by external force such as wind.

For example, when an earthquake occurs, the seismometer 33
Detects this, and outputs a detection signal 33s to the control circuit 31. In the control circuit, the detection signal 33s from the seismometer 33
In response, the supply of the current from the power supply 32 to the coil 17 is started. When a current is supplied to the coil 17, the magnetic field of the permanent magnet 18 is canceled by the magnetic field of the electromagnet constituted by the coil 17 and the projecting member 16. This allows
The apparent viscosity of the magnetic viscous fluid MR decreases instantaneously,
The braking by the brake unit 11 is released. The time required from the detection of vibration by the seismometer 33 to the release of the braking of the brake unit 11 is, for example, on the order of ms.
The response until braking is released is very fast.

When the braking of the brake portion 11 is released, the structure side member 2 and the base side member 4 can move relative to each other, and the structure side member 2 is substantially moved with respect to the base side member 4 which rolls due to the earthquake. It is located at a fixed position, and the roll due to the earthquake does not directly act on the house provided on the structural member 2, and is isolated.

The control circuit 31 continues to supply current from the power supply 32 to the coil while the seismometer 33 detects vibration. When the earthquake converges and the seismometer 33 no longer detects vibration, the control circuit 31 cuts off the supply of current from the power supply 32 to the coil 17. When the supply of current to the coil 17 is interrupted, braking by the brake unit 11 is performed again.

On the other hand, the house provided on the structural member 2 is vibration-isolated, but the earthquake causes some shaking in the house. This shake is caused by the accelerometer 34 provided in the house.
Is detected by The detection signal 34 s of the acceleration of the house detected by the accelerometer 34 is input to the control circuit 31.

In the control circuit 31, even if the seismometer 33 stops detecting the vibration, the control circuit 31 does not merely cut off the supply of the current to the coil 17 to perform the braking by the brake unit 11, but also
Based on the detection signal 34s of the accelerometer 34, the operation of the brake unit 11 is controlled in order to quickly converge the shaking of the house. For example, the brake unit 11 is adjusted in accordance with the period of the shaking of the house detected from the detection signal 34 s of the accelerometer 34.
Until the swing of the house converges, the current supplied to the coil 17 is adjusted to reduce the braking force of the brake unit 11 and the damping effect of the brake unit 11 is positively increased. Utilize it to quickly converge the shaking of the house.

As described above, according to the vibration isolator according to the present embodiment, the magnetic viscous fluid MR is used for the brake portion 11 that brakes the relative movement between the structural member 2 and the base member 4.
By controlling the viscosity of the magnetic viscous fluid MR, the response of the brake unit 11 can be made extremely high,
Immediate response to sudden earthquakes. At normal times, the magnetic viscous fluid MR
Is in a highly viscous state, and the relative movement between the structure-side member 2 and the base-side member 4 is braked, so that even if external force such as wind acts on the house, the house is prevented from sliding and breaking or being damaged. be able to. In addition, at normal times, since no electric power is required for braking the brake unit 11, running costs can be suppressed.

Further, according to the vibration isolator according to the present embodiment, a driving means such as a hydraulic cylinder or the like is not required to restrain the relative movement between the structural member 2 and the base member 4, so that the structure is reduced. It can be simplified and cost can be reduced. Further, according to the vibration isolator according to the present embodiment, even if the relative position of the structure-side member 2 and the base-side member 4 causes the positional relationship between the protruding member 16 of the brake portion 11 and the facing member 13 to change. The brake can be operated at an arbitrary position, and has a greater degree of freedom than a brake mechanically braked by engagement of a pin or the like, for example. Note that, in the above-described embodiment, the configuration including the seismometer 33 and the accelerometer 34 is employed, but a configuration including only the seismometer 33 may be employed.

Second Embodiment FIG. 5 is a view showing the structure of a brake unit of a vibration isolator according to a second embodiment of the present invention, and FIG. 6 is a diagram showing the structure of a brake according to a second embodiment of the present invention. FIG. 3 is a configuration diagram of a control system of the vibration device. In addition,
5 and 6, the same components as those in the first embodiment are denoted by the same reference numerals. The arrangement of the brake unit with respect to the structural member 2 and the base member 4 is the same as in the first embodiment.

The brake unit 101 according to the present embodiment and the first
5 is different from the brake unit 11 according to the embodiment of FIG.
As shown in FIG. 5, the brake unit 101 according to the present embodiment is not provided with the permanent magnet 18. Brake section 101
Does not include the permanent magnet 18, the magnetic viscous fluid MR interposed in the gap d is in a low viscosity state when no current is supplied to the coil 17, and the relative movement between the protruding member 16 and the opposing member 13 Do not act to hinder.

Therefore, in the vibration isolator according to this embodiment, the structure side member 2 is normally used when no earthquake occurs.
And the base member 4 can move relative to each other. For example, when wind acts on a house installed on the structure member 2, the structure member 2 may move with respect to the base member 4. is there.

As shown in FIG. 6, the control system of the vibration isolator according to this embodiment includes a power supply 32 for supplying a current to the coil 17.
And a control circuit 131 for controlling supply / interruption of a current from the power supply 32 to the coil 17, an anemometer 40, and an operation switch 41.

The anemometer 40 detects the wind force acting as an external force acting on the house installed on the structural member 2 and outputs a detection signal 40 s to the control circuit 131. This anemometer 4
0 is installed in a part of a house, for example.

The operation switch 41 is, for example, a switch that can be operated by a resident of the house. When the occupant operates the operation switch 41, the operation signal 41 s is transmitted to the control circuit 13.
1 is output. The operation switch 41 is installed in the house.

The control circuit 131 controls the supply / interruption of the current from the power supply 32 to the coil 17 based on the detection signal 40 s of the anemometer 40 or the operation signal 41 s of the operation switch 41, and controls the viscosity of the magnetic viscous fluid MR. Control. That is, the control circuit 131 increases the apparent viscosity of the magnetic viscous fluid MR by supplying a current to the coil 17,
By interrupting the current to the coil 17, the magnetic viscous fluid MR
Reduces the apparent viscosity of

Specifically, the control circuit 131 controls the anemometer 4
When the wind power detected by 0 is equal to or greater than a certain magnitude, the current is supplied to the coil 17, and when the wind power becomes equal to or less than a certain value, the current supply to the coil 17 is cut off. . The control circuit 131 supplies a current to the coil 17 when the operation signal 41s of the operation switch 41 is input, and shuts off the current supply to the coil 17 when the input of the operation signal 41s stops.

Next, an example of the operation of the vibration isolator according to this embodiment will be described. In a normal state in which vibration such as an earthquake does not occur, the protruding member 16
Magnetic viscous fluid MR interposed in the gap d between
Is in a low-viscosity state, and the brake unit 101 does not brake the relative movement between the structural member 2 and the base member 4.

In the state described above, for example, when an external force such as wind acts on the house provided on the structural member 2, the structural member 2 is not braked by the brake portion 101, so If the brake unit 101 is not actuated, the house may slide and be destroyed or damaged by an external force such as wind.

For example, when an earthquake occurs, the viscosity of the magnetic viscous fluid MR is in a low state, so that the structure-side member 2 and the base-side member 4 move relative to each other, and the base-side member 4 that rolls due to the earthquake. The structure-side member 2 is located at a substantially fixed position, and the roll due to the earthquake does not directly act on the house provided on the structure-side member 2, and the vibration is isolated.

For example, when no earthquake has occurred,
When a strong wind blows, the anemometer 40 detects the wind force and outputs the wind force to the control circuit 131. The control circuit 131 supplies a current from the power supply 32 to the coil 17 if the value is equal to or more than a certain value.
When a current is supplied to the coil 17, a magnetic field is applied to the magnetic viscous fluid MR, and the apparent viscosity of the magnetic viscous fluid MR instantaneously increases, and braking by the brake unit 101 is performed. Detection of strong wind by anemometer 40
The time required until the braking of No. 1 starts is, for example,
ms, and the response is very fast.

When the braking of the brake unit 101 is started,
The movement of the structure-side member 2 and the base-side member 4 is damped, and the sway of the house due to the wind is instantaneously suppressed.

For example, when the resident of the house senses the shaking of the house due to the strong wind, he operates the operation switch 41. As a result, the control circuit 131 supplies a current from the power supply 32 to the coil 17, and the swing of the house due to the wind is instantaneously suppressed by the braking of the brake unit 101.

As described above, according to the present embodiment, the magnetic viscous fluid MR is used for the brake unit 101 that brakes the relative movement between the structural member 2 and the base member 4, and the viscosity of the magnetic viscous fluid MR is reduced. By controlling, the responsiveness of the brake unit 101 can be made very high, and it is possible to immediately respond to external force such as a suddenly generated wind. Can be prevented.
Furthermore, according to the vibration isolator according to the present embodiment, since a driving means such as a hydraulic cylinder is not required to restrict the relative movement between the structure-side member 2 and the base-side member 4, the structure can be simplified. And cost reduction can be realized.

Although the vibration isolator of the present invention has been described with reference to various embodiments, the present invention is not limited to the above embodiments. In the above-described embodiment, the case where the viscosity of the magnetic viscous fluid MR is used as the viscous force acting between the structure-side member 2 and the base-side member 4 has been described. Any fluid such as a fluid whose viscosity can be controlled can be used.

[0058]

According to the present invention, the structure of the brake device of the vibration isolator can be relatively simplified, the cost can be reduced, and the responsiveness can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a schematic configuration of a vibration isolation device according to an embodiment of the present invention, where (a) is a side view and (b) is a plan view.

FIG. 2 is a cross-sectional view showing a schematic structure of a support mechanism 6;

FIG. 3 is a view showing a structure of a brake unit 11,
(A) is a cross-sectional view, and (b) is a plan view seen from the direction of arrow D in (a).

FIG. 4 is a configuration diagram illustrating a configuration of a control system of the vibration isolation device.

FIG. 5 is a diagram illustrating a structure of a brake unit of a vibration isolation device according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram illustrating a configuration of a control system of a vibration isolation device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Structure side member 4 ... Base member 6 ... Support mechanism part 11 ... Brake part 13 ... Opposing member 15 ... Diaphragm 16 ... Projection member 17 ... Coil 18 ... Permanent magnet 31 ... Control circuit 32 ... Power supply 33 ... Seismograph 34 ... Accelerometer 40 ... Anemometer 41 ... Operation switch MR ... Magnetic viscous fluid

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) E04B 1/36 E04B 1/36 L E04H 9/02 331 E04H 9/02 331Z F16F 9/53 F16F 9/53

Claims (11)

[Claims] A supporting means provided between the base and the structure to allow relative movement along a predetermined plane between the base and the structure; and a viscous material between the base and the structure. An anti-vibration device comprising: a braking unit capable of applying a force to brake the relative movement between the base and the structure; and a control unit configured to control the viscous force to operate the braking unit. 2. A base-side vibration detecting means for detecting vibration acting on the base side, wherein the braking means brakes the relative movement by the viscous force in a state where the vibration does not act on the base side. 2. The vibration isolator according to claim 1, wherein the control unit reduces the viscous force and releases the braking by the braking unit in response to the detection of the vibration toward the substrate by the substrate-side vibration detecting unit. 3. A first opposing portion provided on the structure side and having a first opposing surface opposing the base side, the braking means being provided on the base side, the first opposing portion being provided on the base side. A second opposing portion having a second opposing surface opposing the surface with a predetermined gap; a magnetic viscous fluid interposed in a gap between the first opposing surface and the second opposing surface; The vibration isolator according to claim 2, comprising: a permanent magnet that applies a constant magnetic field to the fluid; an electromagnet that can generate a magnetic field in a direction to cancel the magnetic field of the permanent magnet; and a power supply that supplies a current to the electromagnet. 4. The second opposing portion includes an accommodation recess for accommodating the magnetic viscous fluid whose bottom surface constitutes the second opposing surface, and a top surface of the first opposing portion has the first surface. 4. The vibration isolator according to claim 3, further comprising: a protruding portion that protrudes with respect to the housing recess that forms the facing surface of the electromagnet; 5. A structure-side vibration detecting means for detecting vibration on the structure side, wherein the control means controls the braking based on detection signals from the structure-side vibration detecting means and the base-side vibration detecting means. The vibration isolator according to any one of claims 2 to 4, which controls an operation of the means. 6. An external force detecting means for detecting an external force acting on the structure side, wherein the braking means releases the braking of the relative motion in a state where the external force does not act on the structure side. 2. The vibration isolation device according to claim 1, wherein the control unit increases the viscous force of the braking unit to brake the relative movement in accordance with the detection of the external force by the external force detection unit. 3. 7. A first opposing portion provided on the structure side and having a first opposing surface opposing the base side, the braking means being provided on the base side, the first opposing portion being provided on the base side. A second opposing portion having a second opposing surface opposing the surface with a predetermined gap; a magnetic viscous fluid interposed in a gap between the first opposing surface and the second opposing surface; The vibration isolator according to claim 6, further comprising: an electromagnet capable of applying a magnetic field to the fluid; and a power supply configured to supply a current to the electromagnet. 8. The second opposing portion includes an accommodation recess for accommodating the magnetic viscous fluid whose bottom surface constitutes the second opposing surface, and a top surface of the first opposing portion has the first surface. The vibration isolator according to claim 7, further comprising: a protruding portion that protrudes with respect to the housing concave portion that forms the facing surface of the electromagnet; 9. The seal according to claim 4, further comprising sealing means for sealing between the housing recess of the second facing portion and the projecting portion of the first facing portion while allowing the relative movement. Shaking device. 10. The vibration isolator according to claim 9, wherein said sealing means is a diaphragm. 11. The control unit controls supply and cutoff of current to the electromagnet by the power supply in accordance with detection of vibration by the base-side vibration detection unit or detection of an external force by the external force detection unit. Or the vibration isolator according to 7.