JP7425699B2 - Seismic isolation device - Google Patents

Description

The present invention relates to a seismic isolation device provided in a seismic isolation layer formed between a support structure and a supported structure, and a seismic isolation system using the seismic isolation device.

In recent years, seismic isolation devices have been used for purposes such as protecting buildings from earthquakes.
A seismic isolation system is made up of a combination of multiple seismic isolation devices.
For example, when an earthquake occurs, a seismic isolation device protects the building by reducing the acceleration input to the building.
For example, the seismic isolation device employs a laminated rubber bearing that has a structure in which a plurality of rubber plates and iron plates are laminated, a rolling bearing that has linear guides crossed in an XY shape, a sliding bearing that uses sliding, and others.
Furthermore, when a pulling force is applied to the foundation of a building, etc., a lifting mechanism using a disc spring or rubber material is used.
A seismic isolation system may be a combination of seismic isolation devices with multiple structures.

The main functions required of a seismic isolation device are axial force retention function, horizontal deformation performance, restoring force function, and damping function. Furthermore, the ability to lift the material from the ground or lift it up against the pull-out force may be required.
For example, a lead-containing laminated rubber bearing incorporates an axial force retention function, horizontal deformation performance, restoring force function, and damping function into a single mechanism. Rolling and sliding bearings incorporate axial force retention function and horizontal deformation performance into a single mechanism. Lead-filled laminated rubber bearings are sometimes used in combination with a structure that exhibits a floating function.

A seismic isolation device having a permanent magnet and a hard ball is disclosed in Prior Document 1 and Prior Document 2.
Moreover, a seismic isolation device using a ball bearing and a permanent magnet is disclosed in Prior Document 3.

The inventor studied the structure of a seismic isolation device that uses magnets to provide restoring force, and devised the invention of the present application.

The present invention was devised in view of the above-mentioned problems, and aims to provide a seismic isolation device that uses magnets and has a restoring force.

In order to achieve the above object, a seismic isolation device provided in a seismic isolation layer formed between a supporting structure and a supported structure according to the present invention is installed on an upper foundation structure and a supporting structure that support the supported structure. a pair of upper and lower foundation structures having a supported lower foundation structure; an axial force support mechanism that is supported by the lower foundation structure and supports the upper foundation structure so as to be relatively movable in the horizontal direction to support a vertical load; a horizontal restoring force acting mechanism supported by a foundation structure and applying a horizontal restoring force as a horizontal force to the upper foundation structure, the horizontal restoring force acting mechanism being a pair of upper and lower permanent magnets. A plurality of upper permanent magnets and a plurality of lower permanent magnets divided into upper and lower permanent magnets, and a pair of upper and lower permanent magnets made of a magnetic material are placed vertically between the lower part of the plurality of upper permanent magnets and the upper part of the plurality of lower permanent magnets. a permanent magnet holding material that holds the magnets along a virtual circle of the magnets, which is a virtual circle centered on the virtual vertical axes of the pair of upper and lower magnets, which are the virtual vertical axes when viewed from above, with a gap spaced apart by a distance of When the virtual vertical axes of the pair of upper and lower magnets are aligned when viewed from above, the positions of the plurality of upper permanent magnets and the positions of the plurality of lower permanent magnets arranged along the virtual magnet circle are mutually mutual. A magnetic field is generated so that the plurality of upper permanent magnets and the plurality of lower permanent magnets, which overlap each other and whose positions overlap when viewed from above, attract each other.

According to the configuration of the present invention, the pair of upper and lower foundation structures includes an upper foundation structure that supports the supported structure and a lower foundation structure that is supported by the support structure. An axial force support mechanism is supported by the lower foundation structure, supports the upper foundation structure so as to be relatively movable in the horizontal direction, and supports vertical loads. A horizontal restoring force applying mechanism is supported by the lower foundation structure and applies a horizontal restoring force, which is a horizontal force, to the upper foundation structure. The permanent magnet holding material is made of a magnetic material and separates the plurality of pairs of upper and lower permanent magnets by a predetermined distance in the vertical direction between the lower parts of the plurality of upper permanent magnets and the upper parts of the plurality of lower permanent magnets. A gap is provided and the magnets are held along a virtual circle of magnets, which is a virtual circle centered on virtual vertical axes of a pair of upper and lower magnets, which are virtual vertical axes when viewed from above. When the virtual vertical axes of the pair of upper and lower magnets are aligned when viewed from above, the positions of the plurality of upper permanent magnets and the positions of the plurality of lower permanent magnets arranged along the virtual magnet circle overlap with each other, A magnetic field is generated so that the plurality of upper permanent magnets and the plurality of lower permanent magnets whose positions overlap when viewed from above attract each other.
As a result, the upper foundation structure can be supported based on the lower foundation structure, and when an earthquake occurs and relative displacement occurs between the upper foundation structure and the lower foundation structure in the horizontal direction, the positions overlap when viewed from above. The magnetic flux that attracts each other between the plurality of upper permanent magnets and the plurality of lower permanent magnets whose positions overlap when viewed from above is inclined, and the horizontal component of the magnetic force along the magnetic flux that attracts the plurality of permanent magnets arranged along the virtual magnet circle. The force creates a horizontal restoring force between the upper and lower foundation structures that tends to reverse the relative horizontal displacement.

Below, a seismic isolation device according to an embodiment of the present invention will be described. The present invention includes any of the embodiments described below or a combination of two or more of them.

In the seismic isolation device according to the embodiment of the present invention, the restoring force acting mechanism is made of a plurality of upper and lower permanent magnets, which are divided into upper and lower parts, and a plurality of lower permanent magnets, and a pair of upper and lower permanent magnets. A gap is provided between the lower part of the plurality of upper permanent magnets and the upper part of the plurality of lower permanent magnets to separate the plurality of permanent magnets by a predetermined distance in the vertical direction, so that the plurality of permanent magnets are imaginary vertical axes when viewed from above. The permanent magnet holding member is held along a plurality of virtual magnet circles that are virtual circles arranged concentrically centering on a pair of upper and lower magnet virtual vertical axes.
According to the configuration of the above embodiment, the permanent magnet holding material is made of a magnetic material and is vertically separated between the lower part of the plurality of upper permanent magnets and the upper part of the plurality of lower permanent magnets, which separate the plurality of permanent magnets vertically. A pair of upper and lower magnets, which are virtual vertical axes when viewed from above, are provided with gaps spaced apart by a predetermined distance in the direction. A plurality of magnets are held along virtual circles arranged concentrically around the virtual vertical axes. do.
As a result, the upper foundation structure can be supported based on the lower foundation structure, and when an earthquake occurs and relative displacement occurs between the upper foundation structure and the lower foundation structure in the horizontal direction, the positions overlap when viewed from above. The magnetic flux that attracts the plurality of permanent magnets to each other is inclined, and the horizontal component of the magnetic force along the magnetic flux that attracts the plurality of permanent magnets arranged along the virtual circles of the plurality of concentric magnets is the upper foundation structure and the lower foundation structure. A restoring force is generated that attempts to restore the relative displacement in the horizontal direction.

The N poles and S poles of the plurality of pairs of upper and lower permanent magnets arranged along the virtual magnet circle are separated along the vertical direction, and when viewed from above, the upper part of the plurality of pairs of upper and lower permanent magnets is The poles are arranged so as to alternately become north poles and south poles along the magnet virtual circle.
With the configuration of the above embodiment, the N pole and S pole of the plurality of pairs of upper and lower permanent magnets arranged along the virtual magnet circle are separated along the vertical direction. When viewed from above, the upper poles of the plurality of pairs of upper and lower permanent magnets are arranged so as to alternately become N poles and S poles along the virtual magnet circle.
As a result, a stable magnetic flux is generated in the multiple permanent magnets due to the magnetic field, and when an earthquake occurs and a relative displacement occurs between the upper and lower foundation structures in the horizontal direction, the upper and lower foundation structures A restoring force is generated that attempts to restore the relative displacement in the horizontal direction.

In the seismic isolation device according to the embodiment of the present invention, the N poles and S poles of the plurality of pairs of upper and lower permanent magnets arranged along the virtual magnet circle are arranged radially from the virtual vertical axis of the magnets when viewed from above. They are separated along the radial direction, which is the extending direction, and when viewed from above, the outer poles along the radial direction of the upper and lower pairs of the plurality of permanent magnets are alternately N poles and S poles along the virtual magnet circle. It is arranged so that
With the configuration of the above-described embodiment, the north and south poles of the plurality of upper and lower pairs of permanent magnets arranged along the magnet virtual circle extend radially from the magnet virtual vertical axis when viewed from above. Separate along the radial direction. When viewed from above, the outer poles along the radial direction of the plurality of pairs of upper and lower permanent magnets are arranged so as to alternately become N poles and S poles along the virtual magnet circle.
As a result, a stable magnetic flux is generated in the multiple permanent magnets due to the magnetic field, and when an earthquake occurs and a relative displacement occurs between the upper and lower foundation structures in the horizontal direction, the upper and lower foundation structures A restoring force is generated that attempts to restore the relative displacement in the horizontal direction.

In the seismic isolation device according to the embodiment of the present invention, the plurality of permanent magnets in the upper and lower pairs form a gap surrounded by an internal contour in the center when viewed from above, and the horizontal restoring force acting mechanism the permanent magnet, a pair of upper and lower permanent magnet holding materials, and a magnetic pole block that is a block made of a magnetic material, and the inside of the pair of upper and lower parts arranged so as to follow the inner contour from the inside when viewed from above. A magnetic pole block.
With the configuration of the above embodiment, the plurality of pairs of upper and lower permanent magnets form a gap surrounded by an internal contour at the center when viewed from above. The pair of upper and lower internal magnetic pole blocks are blocks made of magnetic material, and are arranged so as to follow the inner contour from the inside when viewed from above.As a result, the magnetic flux that attracts the permanent magnets is transferred to the internal magnetic pole blocks. When a block passes through a block and a horizontal relative displacement occurs between the upper foundation structure and the lower foundation structure due to an earthquake, etc., the relative displacement in the horizontal direction between the upper foundation structure and the lower foundation structure occurs. Further resilience will be generated to try to return to .

The seismic isolation device according to the embodiment of the present invention has an outer contour that is a contour that the plurality of pairs of upper and lower permanent magnets follow from the outside when viewed from above, and the horizontal restoring force applying mechanism a permanent magnet, a pair of upper and lower permanent magnet holding members, and a pair of upper and lower external magnetic pole blocks that are magnetic pole blocks made of a magnetic material and arranged so as to follow the outer contour from the outside when viewed from above. and has.
With the configuration of the above embodiment, the plurality of upper and lower pairs of permanent magnets have an outer contour that is a contour that is followed from the outside when viewed from above. A pair of upper and lower external magnetic pole blocks are blocks made of a magnetic material, and are arranged so as to follow the outer contour from the outside when viewed from above.
As a result, the magnetic flux that attracts the permanent magnets passes through the external magnetic pole block, and when an earthquake or the like occurs and a relative displacement occurs between the upper and lower foundation structures in the horizontal direction, the upper and lower foundation structures An additional restoring force is generated between the structure and the structure that attempts to restore the horizontal relative displacement.

In the seismic isolation device according to an embodiment of the present invention, the horizontal restoring force acting mechanism includes a pair of upper and lower permanent magnets, a pair of upper and lower permanent magnet holding members, and a magnetic pole that is a block made of a magnetic material. The block is provided with a gap between the lower part of the plurality of upper permanent magnets and the upper part of the plurality of lower permanent magnets, each of which is spaced apart by a predetermined distance in the vertical direction, and is a virtual vertical axis when viewed from above. a plurality of intermediate magnetic pole blocks arranged along an intermediate magnetic pole block virtual circle that is a virtual circle centered on a virtual vertical axis of the intermediate magnetic pole block; When the virtual vertical axes of the pair of magnets and the virtual vertical axis of the intermediate magnetic pole block are aligned, the positions of the plurality of upper and lower pairs of permanent magnets arranged along the virtual circle of magnets and the virtual vertical axis of the intermediate magnetic pole block are The positions of the plurality of intermediate magnetic pole blocks arranged in the same direction overlap with each other.
According to the configuration of the above embodiment, the plurality of intermediate magnetic pole blocks are magnetic pole blocks that are blocks made of a magnetic material, and each of the plurality of intermediate magnetic pole blocks has a predetermined distance in the vertical direction between it and the plurality of upper and lower pairs of the permanent magnets. The intermediate magnetic pole blocks are arranged along a virtual circle of the intermediate magnetic pole block, which is a virtual circle centered on the virtual vertical axis of the intermediate magnetic pole block, which is a virtual vertical axis when viewed from above. Regarding the horizontal restoring force acting mechanism, when the virtual vertical axes of the upper and lower pairs of magnets are aligned with the virtual vertical axis of the intermediate magnetic pole block, the plurality of upper and lower pairs of magnets are arranged along the virtual circle of the magnets when viewed from above. The position of the permanent magnet and the position of the plurality of intermediate magnetic pole blocks arranged along the virtual intermediate magnetic pole block circle overlap with each other.
As a result, the magnetic flux that attracts the permanent magnets passes through the intermediate magnetic pole block, and when an earthquake or the like occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the upper and lower foundation structures An additional restoring force is generated between the structure and the structure that attempts to restore the horizontal relative displacement.

In the seismic isolation device according to the embodiment of the present invention, the horizontal restoring force acting mechanism forms a vertically extending columnar shape made of an elastoplastic material, and has an upper end relative to the upper foundation structure and a lower end relative to the lower foundation structure in the horizontal direction. and a plug supported asynchronously.
With the configuration of the above embodiment, the plug is made of an elastoplastic material and has a vertically extending columnar shape, and its upper end is supported by the upper foundation structure and its lower end is supported by the lower foundation structure so as to be immovable in the horizontal direction.
As a result, when an earthquake or similar event occurs and a horizontal relative displacement occurs between the upper and lower foundation structures, the plug shears and deforms, creating a horizontal resistance force that responds to the horizontal relative displacement. Occur.

A seismic isolation device according to an embodiment of the present invention includes a protective material made of a flexible material, the protective material covers the outer periphery of the axial force bearing mechanism and the horizontal restoring force applying mechanism, and the protective material Supports part of the outer periphery of the force bearing mechanism or horizontal restoring force acting mechanism.
With the configuration of the above embodiment, the protective material covers the outer periphery of the axial force support mechanism and the horizontal restoring force applying mechanism. The protective material supports a part of the outer periphery of the axial force support mechanism or the horizontal restoring force acting mechanism.
As a result, when an earthquake or the like occurs and a horizontal relative displacement occurs between the upper foundation structure and the lower foundation structure, the protective material can suppress the movement of the axial force bearing mechanism and the horizontal restoring force acting mechanism. .

The seismic isolation device according to the embodiment of the present invention includes a pair of upper and lower foundation structures, M (M=2, 3...) said axial force bearing mechanisms, and M horizontal restoring force acting mechanisms. , (M-1) connection plates, and one of the axial force bearing mechanisms and one of the horizontal restoring force acting mechanisms are arranged in parallel in the horizontal direction, as a seismic isolation device unit. When called, M seismic isolation device units and (M- 1) The connection plates are arranged alternately along the vertical direction, the upper foundation structure is supported at the upper end, and the lower foundation structure supports the lower end.
According to the configuration of the above embodiment, one in which one of the axial force support mechanisms and one of the horizontal restoring force acting mechanisms are arranged in the horizontal direction is referred to as a seismic isolation device unit. M number of the base isolation device units and (M-1) base isolation device units such that two of the M number of the base isolation device units U are arranged at the upper end and the lower end, respectively. and the connecting plates are arranged alternately along the vertical direction. The upper substructure is disposed on top of the upper end. The lower substructure is disposed below the lower end. The seismic isolation device unit is arranged so that one of the axial force bearing mechanisms and one of the horizontal restoring force applying mechanisms are arranged horizontally.
As a result, when an earthquake occurs and relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the M seismic isolation device units stacked in multiple stages allow relative movement in the horizontal direction. Apply horizontal restoring force.

In the seismic isolation device according to the embodiment of the present invention, the axial force support mechanism has a plurality of rolling elements and a virtual vertical axis centered on a bearing virtual vertical axis, which is a virtual vertical axis when the plurality of rolling elements are viewed from above. It has M (M=1, 2...) bearing units each having a rolling element holding member arranged along a virtual bearing circle which is a circle and holding the rolling element holding member so as to be rotatable. serves also as the intermediate magnetic pole block support body that supports the plurality of intermediate magnetic pole blocks.
With the configuration of the embodiment described above, the rolling element holding members of the M bearing units of the axial force support mechanism are arranged to have a virtual axis centered on the bearing virtual vertical axis, which is a virtual vertical axis when viewing the plurality of rolling elements from above. The bearing is placed along a virtual bearing circle and is held so as to be rotatable.
The rolling element holding material also serves as the intermediate magnetic pole block support that supports the plurality of intermediate magnetic pole blocks.
As a result, when an earthquake or the like occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the bearing unit supports the load while allowing the relative movement in the horizontal direction.

In the seismic isolation device according to the embodiment of the present invention, the axial force support mechanism includes a plurality of elastoplastic plates made of a plurality of elastoplastic materials and a plurality of metal plates made of metal, which are arranged vertically. It has laminated rubber bearings that overlap alternately in the direction, and the metal plate material also serves as the intermediate magnetic pole block support that supports the plurality of intermediate magnetic pole blocks.
According to the configuration of the above embodiment, the laminated rubber bearing of the axial force bearing mechanism has a plurality of elastic-plastic plates made of a plurality of elastic-plastic materials and a plurality of metal plates made of metal arranged vertically. overlap in alternating directions. The metal plate material also serves as the intermediate magnetic pole block support that supports the plurality of intermediate magnetic pole blocks.
As a result, when an earthquake or the like occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the laminated rubber bearing supports the load while allowing the relative displacement in the horizontal direction.

In the seismic isolation device according to the embodiment of the present invention, when viewed from above, either the axial force bearing mechanism or the horizontal restoring force applying mechanism forms a hollow space in the center, and the axial force bearing mechanism and the horizontal restoring force acting mechanism form a hollow space in the center. Either one of the restoring force acting mechanisms is accommodated in the hollow space.
With the configuration of the above embodiment, either the axial force support mechanism or the horizontal restoring force applying mechanism forms a hollow space in the center when viewed from above. Either the axial force support mechanism or the horizontal restoring force applying mechanism is accommodated in the hollow space.
As a result, a compact seismic isolation device with restoring force due to the permanent magnet can be provided.

As explained above, the seismic isolation device according to the present invention has the following effects depending on its configuration.
The axial force support structure is supported by the lower foundation structure and supports the upper foundation structure so as to be relatively movable in the horizontal direction to support a vertical load, and the pair of upper and lower permanent magnet holding members are centered around the virtual vertical axis of the magnet. The horizontal restoring force acting mechanism supports a plurality of pairs of upper and lower permanent magnets arranged along the magnetic virtual circle so that they overlap each other and are separated by a predetermined distance in the vertical direction when viewed from above, the horizontal restoring force acting mechanism is attached to the lower foundation structure. Since the upper foundation structure is supported and a horizontal restoring force is applied to the upper foundation structure, the upper foundation structure can be supported using the lower foundation structure as a foundation, and if an earthquake or the like occurs, a horizontal restoring force can be applied to the upper foundation structure and the lower foundation structure. When a relative displacement in the direction occurs, the magnetic flux that attracts the plurality of permanent magnets whose positions overlap when viewed from above is inclined, and the magnetic force along the magnetic flux that attracts the plurality of permanent magnets aligned along the virtual magnet circle The horizontal component of force generates a horizontal restoring force between the upper and lower foundation structures that attempts to restore the relative displacement in the horizontal direction.
Further, the pair of upper and lower permanent magnet holding members overlap each other when viewing from above the plurality of permanent magnets arranged along the plurality of concentric virtual magnet circles centered on the virtual vertical axis of the magnet. The horizontal restoring force exerting mechanism is supported by the lower foundation structure and applies a horizontal restoring force to the upper foundation structure, so that the upper foundation is When a relative displacement occurs in the horizontal direction between the upper foundation structure and the lower foundation structure due to an earthquake, etc., the magnetic flux that attracts the plurality of permanent magnets whose positions overlap when viewed from above is tilted. Then, the horizontal component of the magnetic force along the magnetic flux that attracts the plurality of permanent magnets arranged along the plurality of concentric virtual magnetic circles causes a relative displacement in the horizontal direction between the upper foundation structure and the lower foundation structure. It creates a restoring force that tries to return to its original state.
Further, the N poles and S poles of the plurality of permanent magnets are separated along the vertical direction, and the upper poles of the plurality of permanent magnets are alternately N and S poles along the virtual magnet circle when viewed from above. As a result, stable magnetic flux is generated in multiple permanent magnets by the magnetic field, and when an earthquake occurs, relative displacement in the horizontal direction occurs between the upper and lower foundation structures. When this occurs, a restoring force is generated between the upper foundation structure and the lower foundation structure that attempts to restore the relative displacement in the horizontal direction.
Further, the N poles and S poles of the plurality of permanent magnets are separated along a radial direction that is a direction extending radially from the virtual vertical axis of the magnets when viewed from above, and the plurality of permanent magnets are arranged in a pair of upper and lower sides when viewed from above. Since the outer poles along the radial direction of the plurality of permanent magnets held by the holding material are arranged so as to become N poles and S poles alternately along the magnet virtual circle, the magnetic field Stable magnetic flux is generated in multiple permanent magnets, and when an earthquake etc. occurs and a horizontal relative displacement occurs between the upper and lower foundation structures, horizontal displacement occurs between the upper and lower foundation structures. A restoring force is generated that attempts to restore the relative displacement in the direction.
Further, since the pair of upper and lower internal magnetic pole blocks are arranged so that the plurality of permanent magnets of the pair of upper and lower sides are arranged from inside along the inner contour surrounding the gap formed in the center when viewed from above, The magnetic flux that attracts the permanent magnets passes through the internal magnetic pole block, and when an earthquake etc. occurs and a relative displacement occurs between the upper and lower foundation structures in the horizontal direction, the difference between the upper and lower foundation structures occurs. An additional restoring force is generated that attempts to restore the relative displacement in the horizontal direction.
In addition, since the pair of upper and lower external magnetic pole blocks are arranged so as to follow the outer contour, which is the contour that the plurality of permanent magnets of the upper and lower pairs follow from the outside, the magnetic flux that attracts the permanent magnets is transmitted to the external magnetic pole block. When a relative displacement occurs in the horizontal direction between the upper foundation structure and the lower foundation structure due to an earthquake, etc., the relative displacement in the horizontal direction between the upper foundation structure and the lower foundation structure More resilience is generated to try to return.
Further, the plurality of intermediate magnetic pole blocks each have a predetermined distance in the vertical direction between the lower part of the plurality of upper permanent magnets and the upper part of the plurality of lower permanent magnets, which are a pair of upper and lower permanent magnets. A pair of upper and lower imaginary magnets are arranged along the imaginary circle of the intermediate magnetic pole block centered on the imaginary vertical axis of the intermediate magnetic pole block, which is a imaginary vertical axis when viewed from above, with the gap spaced apart. When the vertical axis and the virtual vertical axis of the intermediate magnetic pole block are aligned, the positions of the plurality of permanent magnets and the positions of the plurality of intermediate magnetic pole blocks overlap each other, so that the magnetic flux that attracts the permanent magnets is transferred to the intermediate magnetic pole block. When a relative displacement occurs in the horizontal direction between the upper foundation structure and the lower foundation structure due to an earthquake, etc., the relative displacement in the horizontal direction between the upper foundation structure and the lower foundation structure More resilience is generated to try to return.
In addition, since the plug made of elastoplastic material is supported at its upper end by the upper foundation structure and its lower end by the lower foundation structure without being able to move horizontally relative to each other, the upper foundation structure and the lower foundation are When a relative horizontal displacement occurs between the plug and the structure, the plug shears and creates a horizontal resistance force in response to the relative horizontal displacement.
Moreover, since the protective material covers the outer periphery of the axial force bearing mechanism and the horizontal restoring force acting mechanism, relative displacement in the horizontal direction between the upper foundation structure and the lower foundation structure may occur in the event of an earthquake or the like. When this occurs, the protective material can suppress the movement of the axial force support mechanism and the horizontal restoring force applying mechanism.
Further, the seismic isolation device unit includes one axial force bearing mechanism and one horizontal restoring force acting mechanism arranged in parallel along the vertical direction, and M seismic isolation device units and (M -1) Since the above-mentioned intermediate foundation structures are arranged alternately in the vertical direction, when an earthquake etc. occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures. , M base isolation device units stacked in multiple stages apply a horizontal restoring force while allowing relative movement in the horizontal direction.
In addition, since multiple bearings in the bearing unit support the supported structure, when an earthquake occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the bearing unit will move horizontally. Supports the load while allowing relative movement in the direction.
In addition, since the laminated rubber bearing supports the supported structure, when an earthquake occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the laminated rubber bearing supports the supported structure. Supports the load while allowing relative movement.
In addition, since the other of the axial force support mechanism and the horizontal restoring force acting mechanism is arranged to fit into the hollow space formed in the center of one of them when viewed from above, the permanent magnet provides a compact structure with restoring force. It is possible to provide a seismic isolation device.

1 is a conceptual diagram of a seismic isolation system according to an embodiment of the present invention. FIG. 1 is a conceptual diagram of a seismic isolation device according to a first embodiment of the present invention. FIG. 2 is a second conceptual diagram of the seismic isolation device according to the first embodiment of the present invention. 1 is a sectional view of a seismic isolation device according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram of the operation of the seismic isolation device according to the first embodiment of the present invention. FIG. 3 is a conceptual diagram of a seismic isolation device according to a second embodiment of the present invention. FIG. 3 is a sectional view of a seismic isolation device according to a second embodiment of the present invention. FIG. 3 is a conceptual diagram of a seismic isolation device according to a third embodiment of the present invention. FIG. 3 is a sectional view of a seismic isolation device according to a third embodiment of the present invention. FIG. 7 is a conceptual diagram of a seismic isolation device according to a fourth embodiment of the present invention. It is a conceptual diagram No. 1 of a seismic isolation device according to a fifth embodiment of the present invention. FIG. 2 is a second conceptual diagram of a seismic isolation device according to a fifth embodiment of the present invention. It is a sectional view of the seismic isolation device concerning the fifth embodiment of the present invention. It is an explanatory diagram of operation of the seismic isolation device concerning the fifth embodiment of the present invention. FIG. 7 is a conceptual diagram of a seismic isolation device according to a sixth embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated with reference to drawings.
FIG. 1 is a conceptual diagram of a seismic isolation system according to an embodiment of the present invention.
FIG. 1 shows how a plurality of seismic isolation devices 10 according to an embodiment of the present invention are installed in a seismic isolation layer ME between a building S and the ground G.
FIG. 1(A) is a front view of a seismic isolation system that supports a building S.
FIG. 1(B) is a sectional view taken along line II of the seismic isolation system that supports the building S.
Bolts (not shown) fasten the seismic isolation device 10 and the building S.
The seismic isolation layer ME may be different from that shown in FIG. 1 and may be located in the middle layer of the building S.

A plurality of seismic isolation devices 10 are arranged in a grid pattern to support the building S based on the ground G.
A plurality of seismic isolation devices 10 support the load of the building S.
When an earthquake occurs, the plurality of seismic isolation devices 10 isolate the shaking of the earthquake.
The plurality of seismic isolation devices 10 may be a combination of seismic isolation devices 10 having different mechanisms.
The plurality of seismic isolation devices 10 may be a combination of the seismic isolation device according to the embodiment of the present invention and a seismic isolation device having another structure.
Below, a seismic isolation device according to an embodiment of the present invention will be described.

The seismic isolation device 10 according to the embodiment of the present invention is a device provided in a seismic isolation layer ME formed between a supporting structure and a supported structure.
The seismic isolation device 10 according to the embodiment of the present invention may be a device provided in a seismic isolation layer ME formed between the building S and the ground G.
The seismic isolation device 10 according to the embodiment of the present invention may be a device provided in a seismic isolation layer ME formed in the middle of the building S. At this time, the structure above the base isolation layer ME of the building S corresponds to the supported structure, and the structure below the base isolation layer ME of the building S corresponds to the supporting structure.

The seismic isolation device 10 according to the embodiment of the present invention includes a pair of upper and lower foundation structures, an axial force bearing mechanism 10a, and one horizontal restoring force applying mechanism 10b.
The seismic isolation device 10 according to the embodiment of the present invention may include a pair of upper and lower foundation structures, an axial force bearing mechanism 10a, a horizontal restoring force applying mechanism 10b, and a protection member 6.

The seismic isolation device 10 according to the embodiment of the present invention includes a pair of upper and lower foundation structures, one axial force bearing mechanism 10a, and one horizontal restoring force applying mechanism 10b.
The seismic isolation device 10 according to the embodiment of the present invention may include a pair of upper and lower foundation structures, one axial force bearing mechanism 10a, one horizontal restoring force applying mechanism 10b, and the protection member 6.

The seismic isolation device 10 according to the embodiment of the present invention includes a pair of upper and lower foundation structures, M (M=2, 3...) axial force bearing mechanisms 10a, M horizontal restoring force applying mechanisms 10b, and (M -1) connection plates 12.
The seismic isolation device 10 according to the embodiment of the present invention includes a pair of upper and lower foundation structures, M (M=2, 3...) axial force bearing mechanisms 10a, M horizontal restoring force applying mechanisms 10b, and (M -1) connection plate 12 and protective material 6.

The pair of upper and lower foundation structures includes an upper foundation structure that supports the supported structure and a lower foundation structure that is supported by the support structure.
For example, the pair of upper and lower foundation structures includes a flange plate 4 that supports a supported structure and a flange plate 4 that is supported by the support structure.

When one axial force bearing mechanism 10a and one horizontal restoring force acting mechanism 10b are arranged in parallel in the horizontal direction is called a seismic isolation device unit U, M seismic isolation device units U are M seismic isolation device units U and (M-1) connection plates 12 are arranged along the vertical direction so that two of the seismic isolation device units U are arranged at the upper end and the lower end, respectively. may be arranged alternately.
An upper foundation structure is supported at the upper end.
An upper substructure may be secured above and supported by the upper end.
A lower foundation structure supports the lower end.
A lower foundation structure may be fixed to and support the lower end.

When viewed from above, either the axial force bearing mechanism 10a or the horizontal restoring force acting mechanism 10b forms a hollow space H in the center, and the other of the axial force bearing mechanism 10a or the horizontal restoring force acting mechanism 10b forms a hollow space. It may fall within H.
For example, when viewed from above, the axial force support mechanism 10a forms a hollow space H in the center, and the horizontal restoring force applying mechanism 10b fits in the hollow space H.
For example, when viewed from above, the horizontal restoring force acting mechanism may form a hollow space H in the center, and the axial force support mechanism may fit into the hollow space H.

The axial force support mechanism 10a is a mechanism that is supported by the lower foundation structure, supports the upper foundation structure so as to be relatively movable in the horizontal direction, and supports vertical loads.

The axial force support mechanism 10a may be a mechanism that is supported by the lower foundation structure and supports the upper foundation structure so as to be relatively movable in the horizontal direction by rolling operation of a bearing to support vertical loads. For example, the axial force support mechanism 10a may be composed of a bearing unit.
The bearing unit is composed of a plurality of rolling elements 1, a rolling element holding member 2, and a pair of upper and lower axial force receiving members 3.
The rolling element 1 is a spherical structural member.
The rolling element 1 may be a spherical structural member made of magnetic material.
For example, the rolling element 1 is a bearing-like iron ball.
The rolling element holding member 2 holds the plurality of rolling elements 1 so as to be rotatable and arranged along the virtual bearing circle R1 when viewed from above.
The rolling element holding member 2 may hold the plurality of rolling elements 1 so as to be rotatable and arranged at predetermined intervals along the bearing virtual circle R1.
The rolling element holding member 2 may hold the plurality of rolling elements 1 so as to be arranged so as to be rotatable along the plurality of bearing virtual circles R1 when viewed from above.
The rolling element holding members 2 may hold the plurality of rolling elements 1 so as to be rotatable and arranged at predetermined intervals along the plurality of bearing virtual circles R1 when viewed from above.
The rolling element holding material 2 is called a retainer in a bearing.
The plurality of rolling elements 1 may be arranged in series along the virtual bearing circle R1 when viewed from above.
The plurality of rolling elements 1 may be arranged in a staggered manner along the virtual bearing circle R1 when viewed from above.
The plurality of rolling elements 1 may be arranged according to other rules along the virtual bearing circle R1 when viewed from above.

The rolling element holding material 2 may also serve as an intermediate magnetic pole block support body that supports a plurality of intermediate magnetic pole blocks 11c, which will be described later.
The plurality of intermediate magnetic pole blocks 11c and intermediate magnetic pole block supports will be explained in the seismic isolation device according to the embodiment of the present invention.

here,
The bearing virtual vertical axis Z1 is a virtual vertical axis.
The bearing virtual circle R1 is a virtual circle centered on the bearing virtual vertical axis Z1.
The plurality of bearing virtual circles R1 are virtual circles arranged concentrically around the bearing virtual vertical axis Z1.

The axial force support mechanism 10a may be configured with a laminated rubber support.
The laminated rubber bearing has a structure in which a plurality of elastic-plastic plates RP and a plurality of metal plates SP overlap in the vertical direction.
The elastoplastic plate material RP is a plate material made of an elastoplastic material.
The metal plate material SP is a metal plate material.

The horizontal restoring force applying mechanism 10b is a mechanism that is supported by the lower foundation structure and applies a horizontal restoring force, which is a horizontal force, to the upper foundation structure.
Horizontal restoring force is a force in the horizontal direction that attempts to return the seismic isolation device to its original position when it is deformed from its original position, which is the position at the time of the earthquake.
The horizontal restoring force acting mechanism 10b may be configured with a plurality of upper and lower pairs of permanent magnets 8 and an upper and lower pair of permanent magnet holding members 9.
The horizontal restoring force effecting mechanism 10b may include a plurality of pairs of upper and lower permanent magnets 8, a pair of upper and lower permanent magnet holding members 9, and a magnetic pole block 11.
The magnetic pole block 11 may be composed of an internal magnetic pole block 11a.
The magnetic pole block 11 may be composed of an external magnetic pole block 11b.
The magnetic pole block 11 may be composed of an intermediate magnetic pole block 11c.
The horizontal restoring force effecting mechanism 10b may include a plurality of pairs of upper and lower permanent magnets 8, a pair of upper and lower permanent magnet holding members 9, a plug 6a, and a magnetic pole block 11.
The horizontal restoring force effecting mechanism 10b may include a plurality of upper and lower pairs of permanent magnets 8, an upper and lower pair of permanent magnet holding members 9, and a plug 6a.

The pair of upper and lower permanent magnets 8 are composed of upper and lower permanent magnets 8u and lower permanent magnets 8d.

The permanent magnet holding member 9 is arranged such that a gap I is provided between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 6d by a predetermined distance in the vertical direction. The magnet is held along the virtual magnet circle R8 when viewed from above.
The permanent magnet holding material 9 has a pair of upper and lower permanent magnets 8 provided with a gap I between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d by a predetermined distance in the vertical direction. The magnets may be held at predetermined intervals along the magnet virtual circle R8 when viewed from above.
Here, the magnet virtual circle R8 is a virtual circle centered on a pair of upper and lower magnet virtual vertical axes Z8, which are virtual vertical axes.
The permanent magnet holding member 9 is made of a magnetic material and has a gap I that vertically separates the pair of upper and lower permanent magnets 8 by a predetermined distance between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d. may be provided and held along a plurality of virtual magnet circles R8, which are virtual circles arranged concentrically around a pair of upper and lower magnet virtual vertical axes Z8, which are virtual vertical axes when viewed from above.
The permanent magnet holding member 9 is made of a magnetic material and has a gap I that vertically separates the pair of upper and lower permanent magnets 8 by a predetermined distance between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d. may be provided and held at predetermined intervals along a plurality of virtual magnetic circles when viewed from above.
Here, the plurality of magnet virtual circles R8 are virtual circles arranged concentrically around a pair of upper and lower magnet virtual vertical axes Z8, which are virtual vertical axes.

The permanent magnet holding member 9 may be composed of a pair of upper and lower plate-shaped holding plate members.
A pair of upper and lower holding plate members provide a gap I that vertically separates the pair of upper and lower permanent magnets 8 by a predetermined distance between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d. The magnets may be held separately along the virtual magnet circle R8 when viewed from above.
A pair of upper and lower holding plate members provide a gap I that vertically separates the pair of upper and lower permanent magnets 8 by a predetermined distance between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d. The magnets may be held at predetermined intervals along the virtual magnet circle R8 when viewed from above.
A pair of upper and lower holding plate-like members are made of a magnetic material and space the pair of upper and lower permanent magnets 8 apart by a predetermined distance in the vertical direction between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d. A gap I may be provided to hold each magnet along a plurality of virtual magnet circles R8 when viewed from above.
A pair of upper and lower holding plate-like members are made of a magnetic material and space the pair of upper and lower permanent magnets 8 apart by a predetermined distance in the vertical direction between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d. A gap I may be provided and the magnets may be held at predetermined intervals along a plurality of virtual magnet circles R8 when viewed from above.
The plate-shaped holding plate-like member may have a recess capable of holding an air layer on the surface opposite to the surface holding the permanent magnet 8.
The plate-shaped holding plate-like member may be formed with a recess capable of holding an air layer, leaving an edge on the surface opposite to the surface holding the permanent magnet 8.

When the pair of upper and lower magnet imaginary vertical axes Z8 are aligned when viewed from above, the positions of the plurality of upper permanent magnets 8u and the positions of the plurality of lower permanent magnets 8d arranged along the magnet imaginary circle R8 overlap with each other, A plurality of upper permanent magnets 8u and a plurality of lower permanent magnets 8d whose positions overlap when viewed from above generate a magnetic field so as to attract each other.

The N and S poles of a pair of upper and lower permanent magnets 8 arranged along the magnet virtual circle R8 are separated along the vertical direction, and the plurality of permanent magnets 8 arranged along the magnet virtual circle R8 when viewed from above The upper poles of the magnet 9 may be arranged so as to alternately become north poles and south poles along the virtual magnet circle R8.

The N and S poles of the plurality of pairs of upper and lower permanent magnets 8 arranged along the magnet virtual circle R8 are separated along the radial direction, which is a direction extending radially from the magnet virtual vertical axis Z8 when viewed from above. , so that the outer poles along the radial direction of the plurality of permanent magnets 8 lined up along the pair of upper and lower magnetic virtual circles R8 when viewed from above become N poles and S poles alternately along the magnetic virtual circle R8. may be placed.

A pair of upper and lower permanent magnets 8 may form a gap surrounded by an internal contour at the center when viewed from above.
The pair of upper and lower internal magnetic pole blocks 11a may be magnetic pole blocks made of a magnetic material, and may be arranged so as to follow the inner contour when viewed from above.
The pair of upper and lower internal magnetic pole blocks 11a may be magnetic pole blocks made of a magnetic material, and may be arranged so as to follow the inner contour when viewed from above.

When viewed from above, a pair of upper and lower permanent magnets has an outer contour that is a contour that is followed from the outside.
The pair of upper and lower external magnetic pole blocks 11b may be magnetic pole blocks made of a magnetic material, and may be arranged so as to follow the outer contour from the outside when viewed from above.
The plurality of upper and lower external magnetic pole blocks 11b may be magnetic pole blocks made of a magnetic material, and may be arranged so as to follow the outer contour when viewed from above.
A portion of the axial force support mechanism 10a made of a magnetic material may also serve as the external magnetic pole block 11b.

The plurality of intermediate magnetic pole blocks 11c are magnetic pole blocks made of a magnetic material, and are each arranged vertically between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d. Even if a gap Gap is provided to separate the blocks by a distance of good.
The plurality of intermediate magnetic pole blocks 11c are magnetic pole blocks made of a magnetic material, and are each arranged vertically between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d. At predetermined intervals along the intermediate magnetic pole block virtual circle R11, which is a virtual circle centered on the intermediate magnetic pole block virtual vertical axis Z11, which is a virtual vertical axis when viewed from above. may be arranged.
Here, the intermediate magnetic pole block virtual circle R11 is a virtual circle centered on the intermediate magnetic pole block virtual vertical axis Z11, which is a virtual vertical axis.
The plurality of intermediate magnetic pole blocks 11c are magnetic pole blocks made of a magnetic material, and are each arranged vertically between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d. A pair of upper and lower gaps Gap may be provided to separate the intermediate magnetic pole blocks by a distance of , and the intermediate magnetic pole blocks may be arranged along the virtual circle R11 when viewed from above.
The plurality of intermediate magnetic pole blocks 11c are magnetic pole blocks made of a magnetic material, and are each arranged vertically between the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d. A pair of upper and lower gaps Gap may be provided to separate the intermediate magnetic pole blocks by a distance of , and the intermediate magnetic pole blocks may be arranged at predetermined intervals along the virtual circle R11 when viewed from above.
Here, the intermediate magnetic pole block virtual circles R11 are virtual circles arranged concentrically around the intermediate magnetic pole block virtual vertical axis Z11, which is a virtual vertical axis.

The intermediate magnetic pole block support body provides a gap between the plurality of intermediate magnetic pole blocks 11c and the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d by a predetermined distance in the vertical direction. The intermediate magnetic pole block may be supported so as to be arranged along the virtual circle R11 when viewed from above.
A gap Gap in which the plurality of intermediate magnetic pole block supports separates the plurality of intermediate magnetic pole blocks 11c from the lower part of the plurality of upper permanent magnets 8u and the upper part of the plurality of lower permanent magnets 8d by a predetermined distance in the vertical direction, respectively. may be provided and supported so as to be arranged along the plurality of intermediate magnetic pole blocks virtual circles R11 when viewed from above.

The positions of the plurality of permanent magnets 8 in the upper and lower pair arranged along the magnet virtual circle R8 and the intermediate magnetic pole block when the upper and lower pair of magnet virtual vertical axes Z8 and the intermediate magnetic pole block virtual vertical axis Z11 are aligned with each other when viewed from above. The positions of the plurality of intermediate magnetic pole blocks 11c arranged along the virtual circle R11 may overlap with each other.

The plug 6a is made of an elastoplastic material, has a vertically extending columnar shape, and is supported by an upper foundation structure at its upper end and a lower foundation structure at its lower end so as to be immovable in the horizontal direction.
The plug 6a may be made of soft metal and have a vertically extending columnar shape.
For example, a pair of upper and lower permanent magnet holding members 9 form a through hole that extends vertically about the magnet virtual vertical axis Z8, and the plug 6a passes through the through hole.
For example, a pair of upper and lower permanent magnet holding members 9 form a through hole that extends vertically about the magnet virtual vertical axis Z8, and the plug 6a fits into and passes through the through hole.

The protective material 6 is made of a flexible material and covers the outer periphery of the axial force support mechanism and the horizontal restoring force acting mechanism.
The protective material 6 is made of a flexible material and may cover the outer periphery of the seismic isolation device unit U.
The protective material 6 may support a part of the outer periphery of the axial force support mechanism or the horizontal restoring force acting mechanism.
For example, the protective material 6 is made of rubber.
For example, the protective material 6 is made of elastomer.

EMBODIMENT OF THE INVENTION Below, the seismic isolation apparatus based on several embodiment of this invention is each demonstrated based on a figure.

First, a seismic isolation device 10 according to a first embodiment of the present invention will be explained based on the drawings.
FIG. 2 is a first conceptual diagram of the seismic isolation device according to the first embodiment of the present invention. FIG. 3 is a second conceptual diagram of the seismic isolation device according to the first embodiment of the present invention. FIG. 4 is a sectional view of the seismic isolation device according to the first embodiment of the present invention. FIG. 5 is an explanatory diagram of the operation of the seismic isolation device according to the first embodiment of the present invention.
The seismic isolation device 10 according to the first embodiment of the present invention has a single-stage seismic isolation device unit that does not include the above-described magnetic pole block 8 and plug 6a.

The seismic isolation device 10 according to the embodiment of the present invention includes a pair of upper and lower foundation structures, one axial force bearing mechanism 10a, one horizontal restoring force applying mechanism 10b, and a covering material 6.
In FIG. 2, for convenience of explanation, the horizontal restoring force applying mechanism 10b is omitted.
FIG. 2(A) shows a cross section of a seismic isolation device 10 that is a basic form for providing a restoring portion using a magnet according to the present invention.
FIG. 2(B) shows a cross section taken along II-1.
The seismic isolation device 10 includes a rolling element 1, a rolling element holding member 2, an axial force receiving member 3, a flange plate 4, a bolt hole 5 for fastening to a building S, and a protective member 6.
For example, the material of the protective material 6 is rubber.
In the example shown in FIG. 2, the rolling elements 1 are arranged in three layers on the circumference. The rolling element 1 is restrained by a rolling element holding member 2. The weight of the building S is supported by the axial force receiving member 3 and the rolling elements 1. The rolling elements are movable 360° in the horizontal direction. The axial force receiving material 3 is fastened to the flange plate 4 with bolts.
FIG. 3(A) shows a cross section of the seismic isolation device 10 according to the first embodiment of the present invention. The basic form of FIG. 2 is provided with a central permanent magnet 8 and a permanent magnet holding member 9.
FIG. 3(B) shows a cross section at the II-II position. The permanent magnet 9 is attached to a permanent magnet holding member 9. For example, the attachment method is adhesive. The material of the permanent magnet 8 is, for example, a neodymium magnet, and the magnetic poles are formed in the vertical direction. The shape is circular. The permanent magnets 8 are arranged circumferentially, and adjacent permanent magnets 8 have different poles facing each other. Moreover, the permanent magnets 8 facing each other vertically have a clear gap I and have different poles facing each other. In the example shown in FIG. 3, the permanent magnets 8 are arranged in one layer on the circumference, but they may be arranged in multiple layers. Further, the shape of the permanent magnet may be, for example, a hexahedral square shape.

FIG. 3 shows a seismic isolation device 10 that includes a pair of upper and lower foundation structures, one axial force bearing mechanism 10a, one horizontal restoring force acting mechanism 10b, and a covering material 6.
The main structures of the pair of upper and lower foundation structures are the same as those described above, so the distinctive parts will be explained.
The pair of upper and lower basic structures are a pair of upper and lower flange plates 4 that are fixed to the axial force receiving member 3 of the axial force support mechanism 10a with bolts 7.
The flange plate 4 has connecting bolt holes connected to a supporting structure or a supported structure using anchor bolts AB or stud bolts SB.

The axial force support mechanism 10a has the above-described bearing unit.
The bearing unit is composed of a plurality of rolling elements 1, one rolling element holding member 2, and a pair of upper and lower axial force receiving members 3.
A hollow space H is formed in the center of the bearing unit when viewed from above.
The rolling elements 1 may be spherical bodies made of magnetic material.
The rolling element holding material 2 is arranged along three bearing imaginary circles R1, which are imaginary circles arranged concentrically around a bearing imaginary vertical axis Z1, which is an imaginary vertical axis when the plurality of rolling elements 1 are viewed from above. They are arranged at predetermined intervals and held so as to be rotatable.
The three virtual bearing circles R1 are three virtual circles arranged concentrically around the virtual bearing vertical axis Z1, which is a virtual vertical axis when viewed from above.
In FIG. 2, 16 rolling elements 1 are arranged at predetermined intervals along one virtual bearing circle R1.
The pair of upper and lower axial force receiving members 3 are members that form rolling surfaces on which the plurality of rolling elements 1 roll.
When viewed from above, the pair of upper and lower axial force receiving members 3 form a hollow space H centered on the virtual bearing vertical axis Z1.

The horizontal restoring force acting mechanism 10b is composed of a plurality of upper and lower permanent magnets 8 and a permanent magnet holding member 9.
The pair of upper and lower permanent magnets 8 includes a plurality of upper permanent magnets 9u and a plurality of lower permanent magnets 9d.
The permanent magnet holding member 9 is composed of a pair of upper and lower plate-shaped holding plate members.
The pair of upper and lower plate-shaped holding plate-like members is arranged such that the plurality of upper and lower permanent magnets 8, the plurality of upper permanent magnets 9u, and the plurality of lower permanent magnets 9d are arranged with a gap I between them to form one magnet virtual circle R8. be held at predetermined intervals along the
The gap I separates the plurality of upper permanent magnets 9u and the plurality of lower permanent magnets 9d by a predetermined distance in the vertical direction.
The gap I may be an air layer that vertically separates the plurality of upper permanent magnets 9u and the plurality of lower permanent magnets 9d by a predetermined distance.
The magnet virtual circle R8 is a virtual circle centered on a pair of upper and lower magnet virtual vertical axes Z8, which are virtual vertical axes when viewed from above.
In FIG. 3, the pair of upper and lower holding plate-like members has a gap I that vertically separates the lower parts of the eight upper permanent magnets 9u and the upper parts of the eight lower permanent magnets 9d by a predetermined distance. A state in which a pair of upper and lower permanent magnets 8 are held at a predetermined interval along one virtual magnet circle R8 is shown.

The horizontal restoring force acting mechanism 10b is housed in the hollow space H.
For example, the outer peripheries of the pair of upper and lower plate-shaped holding plate members fit into the inner walls forming the hollow space H of the pair of upper and lower axial force receiving members 3.
A gap having the largest possible area is formed between the pair of upper and lower holding plate members and the pair of upper and lower foundation structures when viewed from above.
For example, a depression having the largest possible area is formed on the surface of the pair of upper and lower plate-shaped holding plate members facing the pair of upper and lower foundation structures.
This can prevent the magnetic flux generated from the permanent magnet 8 from leaking to the pair of upper and lower foundation structures.

When the pair of upper and lower magnet imaginary vertical axes Z8 are aligned when viewed from above, the positions of the plurality of upper permanent magnets 8u and the positions of the plurality of lower permanent magnets 8d arranged along the magnet imaginary circle R8 overlap each other, A magnetic field is generated so that the plurality of upper permanent magnets 8u and the plurality of lower permanent magnets 8d, which overlap in position when viewed from above, attract each other.
When the pair of upper and lower magnet imaginary vertical axes Z8 are aligned when viewed from above, the positions of the plurality of upper permanent magnets 8u and the positions of the plurality of lower permanent magnets 8d arranged along the magnet imaginary circle R8 overlap each other, A plurality of upper permanent magnets 8u and a plurality of lower permanent magnets 8d whose positions overlap when viewed from above generate a magnetic field by aligning their magnetic poles so that they attract each other.
If the downwardly facing pole of the upper permanent magnet 8u is the north pole, the upwardly facing pole of the lower permanent magnet 8d, which overlaps the upper permanent magnet 8u when viewed from above, is the south pole.
If the downwardly facing pole of the upper permanent magnet 8u is the S pole, the upwardly facing pole of the lower permanent magnet 8d that overlaps the upper permanent magnet 8u when viewed from above is the N pole.

The N and S poles of the plurality of pairs of upper and lower permanent magnets 9 arranged along the virtual magnet circle R8 are separated along the up and down direction.
When viewed from above, the upper poles of the plurality of pairs of upper and lower permanent magnets 9 are arranged so as to alternately become N poles and S poles along the virtual magnet circle R8.

FIG. 4 shows the longitudinal and circumferential magnetic circuit in the III-III position shown in FIG.
A magnetic field is formed from the north pole to the south pole.
When the figure is viewed from the front, the magnetic flux emitted from the N pole of the upper permanent magnet 9u passes through the rolling element holder 2 and reaches the S pole of the opposing lower magnet 8d. Further, the magnetic flux emitted from the N pole of the permanent magnet 8 reaches the S pole of the adjacent permanent magnet 8. It also passes through the permanent magnet holding material 9 and reaches the S pole of the permanent magnet 8 . The magnetic flux emitted from the N pole of the permanent magnet 8 passes through the permanent magnet holding material 9 and reaches the S pole of the adjacent permanent magnet 8 .
FIG. 4 shows the positions of a plurality of upper permanent magnets 8u and a plurality of lower permanent magnets 8d arranged along a magnet virtual circle R8 when the pair of upper and lower magnet virtual vertical axes Z8 are aligned when viewed from above. It is shown that a plurality of upper permanent magnets 8u and a plurality of lower permanent magnets 8d, which overlap each other and whose positions overlap when viewed from above, generate a magnetic field by aligning their magnetic poles so that they attract each other.

The main structure of the protective material 6 is the same as that described above, so the characteristic parts will be explained.
The protection member 6 is a cylindrical member made of a flexible material and whose upper end is fixed to the upper substructure and whose lower end is fixed to the lower magnetic substructure.

The operation of the seismic isolation device according to the first embodiment of the present invention will be explained based on the drawings.
FIG. 5(A) shows the situation when no earthquake occurs.
FIG. 5(A) shows the seismic isolation device of the first embodiment of the present invention being installed on the foundation F of the seismic isolation layer ME.
The seismic isolation device 10 is fixed to the foundation FB with anchor bolts AB or stud bolts SB.
FIG. 6(B) shows the situation when an earthquake is occurring.
Before an earthquake occurs, the upper permanent magnet 9u and the lower permanent magnet 9 are opposed to each other with a gap I in between, and are located neutrally due to the influence of the magnetic flux described above. The rolling elements 1 and the axial force receiving member 3 support the weight of the building.
When an earthquake occurs, the rolling elements 1 move horizontally on the rolling surface of the axial force receiving member 3, thereby exhibiting a seismic isolation effect. When the earthquake ends, the rolling elements 1 are pulled back by the effect of magnetic attraction, and the seismic isolation device 10 returns to its original position. The horizontal rigidity of the seismic isolation device 10 is caused by the strength of the magnetic field, and can be set by selecting the size and number of permanent magnets 8. Further, the pulling force can be adjusted in the same way.

The load of the building S is transmitted to the foundation FB through the upper foundation structure, the axial force receiving member 3, the rolling elements 1, and the lower foundation structure in this order.
The bearing unit 2 supports the building load, and the rolling elements 1 can move 360° horizontally on the rolling surface of the axial force receiving member 3.
When an earthquake occurs, horizontal force due to the earthquake is transmitted from the foundation FB to the building S through the seismic isolation device 10. Acceleration occurs in the building S and it moves horizontally.
A horizontal arbitrary force is generated in the seismic isolation device, and as seen from above, a deviation occurs in the magnet imaginary vertical axis Z8 of the upper permanent magnet 8u, the bearing imaginary vertical axis Z1, and the magnet imaginary vertical axis Z8 of the lower permanent magnet 8d.
When viewed from above, if a deviation occurs in the magnetic vertical axis Z8 of the upper permanent magnet 8u, the bearing virtual vertical axis Z1, and the magnetic vertical axis Z8 of the lower permanent magnet 8d, the magnetic flux generated in the plurality of upper and lower pairs of permanent magnets 8 Lean.
In the force that attracts the plurality of upper and lower pairs of permanent magnets 8 along the magnetic flux, a horizontal component force that tries to reduce the horizontal displacement of the upper and lower pairs of plurality of permanent magnets 8 is generated.
As a result, a horizontal restoring force acts on the building S to return the horizontal displacement to its original value.

Next, a seismic isolation device according to a second embodiment of the present invention will be explained based on the drawings.
FIG. 6 is a conceptual diagram of a seismic isolation device according to a second embodiment of the present invention. FIG. 7 is a partial sectional view of a seismic isolation device according to a second embodiment of the present invention.
FIG. 6(A) shows a sectional view of a seismic isolation device according to a second embodiment of the present invention.
The seismic isolation device according to the second embodiment of the present invention is different from the seismic isolation device according to the first embodiment of the present invention in that the magnetic poles of the permanent magnet 8 extend radially around the magnet from the virtual vertical axis Z8. This is the point where they are separated along the lines.
FIG. 6(B) is a sectional view taken along the line IV-IV of the seismic isolation device according to the second embodiment of the present invention.

The seismic isolation device 10 according to the embodiment of the present invention includes a pair of upper and lower foundation structures, one axial force bearing mechanism 10a, one horizontal restoring force applying mechanism 10b, and a covering material 6.
The configurations of the pair of upper and lower foundation structures, the one axial force support mechanism 10a, and the covering material 6 are the same as those of the seismic isolation device according to the first embodiment of the present invention, so the explanation will be omitted.

The horizontal restoring force acting mechanism 10b is composed of a plurality of upper and lower permanent magnets 8 and a permanent magnet holding member 9.
The main configurations of the plurality of upper and lower pairs of permanent magnets 8 and the permanent magnet holding member 9 are the same as those of the seismic isolation device according to the first embodiment of the present invention, so only the characteristic points will be described.

When the pair of upper and lower magnet imaginary vertical axes Z8 are aligned when viewed from above, the positions of the plurality of upper permanent magnets 8u and the positions of the plurality of lower permanent magnets 8d arranged along the magnet imaginary circle R8 overlap each other, A plurality of upper permanent magnets 8u and a plurality of lower permanent magnets 8d whose positions overlap when viewed from above generate a magnetic field so as to attract each other.
When the pair of upper and lower magnet imaginary vertical axes Z9 are aligned when viewed from above, the positions of the plurality of upper permanent magnets 8u and the positions of the plurality of lower permanent magnets 8d arranged along the magnet imaginary circle R8 overlap each other, A plurality of upper permanent magnets 8u and a plurality of lower permanent magnets 8d whose positions overlap when viewed from above generate a magnetic field by aligning their magnetic poles so that they attract each other.

The N and S poles of the plurality of pairs of upper and lower permanent magnets 8 arranged along the magnet virtual circle R8 are separated along the radial direction, which is a direction extending radially from the magnet virtual vertical axis Z8 when viewed from above. .
When viewed from above, the outer poles along the radial direction of the plurality of upper and lower pairs of permanent magnets 8 are arranged so as to alternately become N poles and S poles along the virtual magnet circle R8.

FIG. 7 shows a magnetic circuit of a seismic isolation device according to a second embodiment of the present invention.
In the seismic isolation device according to the second embodiment of the present invention, in addition to the circumferential and longitudinal magnetic circuits between the permanent magnets 8 described in the seismic isolation device according to the first embodiment of the present invention, A circumferential magnetic circuit passing through the magnetic force receiving material 3 is generated, and a stronger magnetic circuit than that of the seismic isolation device according to the first embodiment of the present invention can be easily formed, and a stronger horizontal restoring force can be obtained.

Next, a seismic isolation device according to a third embodiment of the present invention will be explained based on the drawings.
FIG. 8 is a conceptual diagram of a seismic isolation device according to a third embodiment of the present invention. FIG. 9 is a partial sectional view of a seismic isolation device according to a third embodiment of the present invention.
FIG. 8 shows a sectional view of a seismic isolation device 10 according to a third embodiment of the present invention.
The seismic isolation device according to the third embodiment of the present invention differs from the seismic isolation device according to the second embodiment of the present invention in that a magnetic pole block 11 is provided in the center. For example, the material of the magnetic pole block 11 is ferromagnetic.
The seismic isolation device 10 according to the third embodiment of the present invention differs from the seismic isolation device 10 according to the second embodiment of the present invention in that the horizontal restoring force generation mechanism 10b is equipped with a magnetic pole block 11. It is.
For example, the material of the magnetic pole block 11 is ferromagnetic.
FIG. 9 shows a radial magnetic circuit of a seismic isolation device according to a third embodiment of the invention. The seismic isolation device according to the third embodiment of the present invention includes, in addition to the circumferential and longitudinal magnetic circuits passing between the magnets and through the magnetic force receiving material, as described in the seismic isolation device according to the second embodiment of the present invention. Therefore, a magnetic circuit passing through the magnetic pole block 11 provided inside is added, and a stronger magnetic circuit than that of the seismic isolation device according to the second embodiment of the present invention is generated, and a stronger restoring effect can be obtained.

The magnetic pole block 11 is composed of an internal magnetic pole block 11a.
The magnetic pole block 11 may be composed of a plurality of internal magnetic pole blocks 11a.
The magnetic pole block 11 may include a pair of upper and lower internal magnetic pole blocks 11a.
The magnetic pole block 11 may include a plurality of upper and lower pairs of internal magnetic pole blocks 11a.
The magnetic pole block 11 may include an inner magnetic pole block 11a and an outer magnetic pole block 11b.
The magnetic pole block 11 may include a plurality of internal magnetic pole blocks 11a and a plurality of external magnetic pole blocks 11b.
The magnetic pole block 11 may include a pair of upper and lower internal magnetic pole blocks 11a and a pair of upper and lower external magnetic pole blocks 11b.
The magnetic pole block 11 may include a plurality of upper and lower pairs of internal magnetic pole blocks 11a and a plurality of upper and lower pairs of external magnetic pole blocks 11b.

The internal magnetic pole block 11a is a magnetic pole block made of a magnetic material, and is arranged so as to follow the inner contour from the inside when viewed from above.
The plurality of internal magnetic pole blocks 11a may be magnetic pole blocks made of a magnetic material, and may be arranged so as to follow the inner contour from the inside when viewed from above.
Here, the internal contour is a contour surrounding a gap formed in the center by a pair of upper and lower permanent magnets 8 when viewed from above.
That is, a plurality of pairs of upper and lower permanent magnets 8 form a gap surrounded by an internal contour at the center when viewed from above.

The external magnetic pole block 11b is a magnetic pole block made of a magnetic material, and is arranged so as to follow the outer contour from the outside when viewed from above.
The plurality of external magnetic pole blocks 11b are magnetic pole blocks made of a magnetic material, and may be arranged so as to follow the outer contour from the outside when viewed from above.
Here, the outer contour is a contour that follows the plurality of upper and lower pairs of permanent magnets 8 from the outside when viewed from above.
That is, when viewed from above, the plurality of upper and lower pairs of permanent magnets 8 have an outer contour that is a contour that is followed from the outside.
A portion of the axial force support mechanism 10a may also serve as the external magnetic pole block 11b.
FIG. 7 shows how the axial force bearing member 3 of the bearing unit of the axial force support mechanism 10a also serves as the external magnetic pole block 11b.

FIG. 9 shows a radial magnetic circuit of a seismic isolation device according to a third embodiment of the invention.
In the seismic isolation device according to the third embodiment of the present invention, the circumferential direction and the longitudinal direction passing through the axial force receiving member 3 between the permanent magnets 8 explained in the seismic isolation device according to the second embodiment of the present invention In addition to the magnetic circuit, a magnetic circuit passing through the internal magnetic pole block 11a is added, and it is easier to form a stronger magnetic circuit than in the seismic isolation device according to the second embodiment of the present invention, and it is easier to obtain stronger horizontal restoring force. .

Next, a seismic isolation device according to a fourth embodiment of the present invention will be explained based on the drawings.
FIG. 10 is a conceptual diagram of a seismic isolation device according to a fourth embodiment of the present invention.
FIG. 10 shows a cross section of a seismic isolation device according to a fourth embodiment of the present invention. In the seismic isolation device according to the fourth embodiment of the present invention, when the portion of the seismic isolation device according to the first embodiment of the present invention excluding the plunge plate 4 is referred to as a seismic isolation device unit U, the connection plate 12 are stacked vertically to form a seismic isolation device.
FIG. 10 shows a cross section of a seismic isolation device according to a fourth embodiment of the present invention. The seismic isolation device according to the fourth embodiment of the present invention has the seismic isolation device according to the first embodiment of the present invention excluding the flange plate as a seismic isolation device unit U, and is stacked vertically via the connection plate 12. This is an example of forming a seismic isolation device. Here, an example of stacking three layers is shown.
In addition, it goes without saying that the seismic isolation devices according to the second and third embodiments of the present invention may be stacked in multiple stages, but by stacking them in multiple stages in this way, the amount of horizontal movement can be increased. It is possible to obtain a large seismic isolation effect.
FIG. 10 shows an example in which three layers are stacked.
Seismic isolation device units U in a seismic isolation device other than the seismic isolation device according to the first embodiment of the present invention may be stacked in multiple stages.
By stacking them in multiple stages, the amount of movement in the horizontal direction can be increased, and a large seismic isolation effect can be obtained.

The seismic isolation device according to the fourth embodiment of the present invention is composed of a pair of upper and lower foundation structures, three axial force bearing mechanisms 10a, three horizontal restoring force applying mechanisms 10b, and two connection plates 12. be done.
Three seismic isolation device units U and two connection plates are arranged alternately along the vertical direction so that the seismic isolation device units U are arranged at the upper end and the lower end.
An upper foundation structure is supported at the upper end.
A lower foundation structure supports the lower end.
Here, a structure in which one axial force bearing mechanism 10a and one horizontal restoring force acting mechanism 10b are arranged in parallel in the horizontal direction is called a seismic isolation device unit.
In FIG. 10, the seismic isolation device unit U is composed of one axial force bearing mechanism 10a that forms a hollow space H in the center when viewed from above, and one horizontal restoring force applying mechanism 10b that fits in the hollow space H. This shows how it is done.

Next, a seismic isolation device 10 according to a fifth embodiment of the present invention will be explained based on the drawings.
FIG. 11 is a first conceptual diagram of a seismic isolation device according to a fifth embodiment of the present invention. FIG. 12 is a second conceptual diagram of the seismic isolation device according to the fifth embodiment of the present invention. FIG. 13 is a sectional view of a seismic isolation device according to a fifth embodiment of the present invention. FIG. 14 is an explanatory diagram of the operation of the seismic isolation device according to the fifth embodiment of the present invention.
The seismic isolation device 10 according to the fifth embodiment of the present invention adds an intermediate magnetic pole block 11c and a plug 6a to the seismic isolation device 10 according to the first embodiment of the present invention. This is what I did.
The seismic isolation device 10 according to the fifth embodiment of the present invention includes a plurality of intermediate magnetic pole blocks 11c and plugs 6a in the seismic isolation device 10 according to the first embodiment of the present invention. may be added.

The intermediate magnetic pole block 11c and the plug 6a will be explained below.

The intermediate magnetic pole block 11c is a magnetic pole block made of a magnetic material.
The intermediate magnetic pole block 11c has a gap Gap between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d, each of which is a pair of upper and lower permanent magnets 8, by a predetermined distance in the vertical direction. are arranged along an intermediate magnetic pole block virtual circle R11, which is a virtual circle centered on an intermediate magnetic pole block virtual vertical axis Z11, which is a virtual vertical axis when viewed from above.
The intermediate magnetic pole block 11c has a gap Gap between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d, each of which is a pair of upper and lower permanent magnets 8, by a predetermined distance in the vertical direction. The intermediate magnetic pole blocks are arranged along a plurality of intermediate magnetic pole blocks virtual circles R11, which are virtual circles arranged concentrically with the center of the intermediate magnetic pole block virtual vertical axis Z11, which is a virtual vertical axis when viewed from above.
The intermediate magnetic pole block 11c has a gap Gap between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 6d, each of which is a pair of upper and lower permanent magnets 8, by a predetermined distance in the vertical direction. A plurality of intermediate magnetic pole blocks are arranged at predetermined intervals along a plurality of intermediate magnetic pole blocks virtual circles R11, which are virtual circles arranged in concentric circles centered on the intermediate magnetic pole block virtual vertical axis Z11, which is a virtual vertical axis when viewed from above. Ru.

The intermediate magnetic pole block support body vertically extends the plurality of intermediate magnetic pole blocks 11c between the lower parts of the plurality of upper permanent magnets 8u, which are the upper and lower pairs of the plurality of permanent magnets 8, and the upper parts of the plurality of lower permanent magnets 9d. A gap Gap may be provided to separate the intermediate magnetic pole blocks by a predetermined distance, and the intermediate magnetic pole blocks may be supported so as to be arranged along the virtual circle R11.
The intermediate magnetic pole block support body vertically extends the plurality of intermediate magnetic pole blocks 11c between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d, which are a pair of upper and lower permanent magnets 8. A gap Gap may be provided to separate the intermediate magnetic pole blocks by a predetermined distance, and the intermediate magnetic pole blocks may be supported so as to be arranged at predetermined intervals along the virtual circle R11.
An intermediate magnetic pole block supporter holds the plurality of intermediate magnetic pole blocks in a predetermined vertical direction between the lower parts of the plurality of upper permanent magnets 8u and the upper parts of the plurality of lower permanent magnets 8d, each of which is a pair of upper and lower permanent magnets 8. A plurality of intermediate magnetic pole blocks may be supported so as to be arranged along a virtual circle with a gap Gap spaced apart from each other by a distance of .
An intermediate magnetic pole block supporter holds the plurality of intermediate magnetic pole blocks vertically between the lower parts of the plurality of upper permanent magnets 9u and the upper parts of the plurality of lower permanent magnets 8d, each of which is a pair of upper and lower permanent magnets 8. A plurality of intermediate magnetic pole blocks may be supported so as to be arranged at predetermined intervals along a virtual circle with a gap Gap spaced apart by a distance of .

The positions of the plurality of permanent magnets 8 in the upper and lower pairs arranged along the magnet virtual circle R8 and the intermediate magnetic pole block virtual when the upper and lower pair of magnet virtual vertical axes Z8 and the intermediate magnetic pole block virtual vertical axis are aligned when viewed from above. The positions of the plurality of intermediate magnetic pole blocks 11c arranged along the circle R11 overlap with each other.

The rolling element holding material 2 may also serve as an intermediate magnetic pole block support.
FIG. 11 shows how the rolling element holding material 2 also serves as an intermediate magnetic pole block support.

The plug 6a is a member that is made of an elastoplastic material and has a columnar shape that extends vertically, and is supported with an upper end at an upper foundation structure and a lower end at a lower foundation structure so that they cannot be phased relative to each other in the horizontal direction.
The plug 6a may pass through a vertically extending through hole formed in the pair of upper and lower permanent magnet holding members 9 with the magnet imaginary vertical axis Z8 as the center.
The plug 6a may fit into and pass through a vertically extending through hole formed in the pair of upper and lower permanent magnet holding members 9 with the magnet imaginary vertical axis Z8 as the center.

Next, a seismic isolation device according to a sixth embodiment of the present invention will be described based on the drawings.
FIG. 15 is a conceptual diagram of a seismic isolation device according to a sixth embodiment of the present invention.
FIG. 15(A) shows a cross section of a seismic isolation device according to a sixth embodiment of the present invention.
FIG. 15(B) shows the XI-XI cross section of the seismic isolation device according to the sixth embodiment of the present invention.
The seismic isolation device according to the sixth embodiment of the present invention is different from the seismic isolation device according to the first embodiment of the present invention in the structure of an axial force support mechanism 10a.
In the seismic isolation devices according to the first to fifth embodiments of the present invention, the basic form is the structure shown in FIG. may be provided.

The axial force support mechanism 10a includes a laminated rubber support.
A pair of upper and lower permanent magnet holding members 9 are sandwiched between a pair of upper and lower permanent magnet holding material bases 9a from above and below.
The permanent magnet holding material foundation 9a is sandwiched and fixed between the axial force receiving material 3 and the flange plate 4.
A laminated rubber bearing is a structure in which a plurality of elastoplastic plates made of a plurality of elastoplastic materials and a plurality of metal plates made of metal are stacked alternately in the vertical direction.
The metal plate material may also serve as an intermediate magnetic pole block supporter that supports the plurality of intermediate magnetic pole blocks 11c.

As explained above, the seismic isolation device according to the present invention has the following effects depending on its configuration.
The axial force support structure 10a is supported by the lower foundation structure and supports the upper foundation structure so as to be relatively movable in the horizontal direction to support the vertical load,
A pair of upper and lower permanent magnet holding members 9 overlap each other by a predetermined distance in the vertical direction when viewing a plurality of upper and lower pairs of permanent magnets 8 arranged along a virtual magnet circle R8 centered on a magnet virtual vertical axis Z8 from above. Since the horizontal restoring force exerting mechanism 10b that supports the spaced apart support is supported by the lower foundation structure and applies horizontal restoring force to the upper foundation structure, the upper foundation structure can be supported based on the lower foundation structure, and earthquakes etc. When a relative displacement occurs in the horizontal direction between the upper foundation structure and the lower foundation structure, the magnetic flux that attracts the plurality of permanent magnets 8 whose positions overlap when viewed from above is tilted, and the magnetic flux is inclined to the magnetic virtual circle R8. The horizontal component of the magnetic force along the magnetic flux that attracts the plurality of permanent magnets 8 that are lined up generates a horizontal restoring force between the upper foundation structure and the lower foundation structure that attempts to restore the relative displacement in the horizontal direction.
Further, the pair of upper and lower permanent magnet holding members 9 overlap each other when viewed from above the pair of upper and lower permanent magnets 8 arranged along the plurality of concentric virtual magnet circles R8 centered on the virtual vertical axis Z8. The horizontal restoring force applying mechanism 10b, which supports the upper foundation structure by a predetermined distance in the vertical direction, is supported by the lower foundation structure and applies horizontal restoring force to the upper foundation structure, so that the upper foundation structure is When an earthquake or the like occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the magnetic flux that attracts the plurality of permanent magnets 8 whose positions overlap when viewed from above is tilted. Then, the horizontal component of the magnetic force along the magnetic flux that attracts the plurality of permanent magnets 8 arranged along the plurality of concentric virtual magnet circles R8 causes a relative displacement in the horizontal direction between the upper foundation structure and the lower foundation structure. It creates a restoring force that tries to return to its original state.
Further, the N poles and S poles of the plurality of permanent magnets 8 are separated along the vertical direction, and the upper poles of the plurality of permanent magnets 8 are alternately N and S poles along the magnet virtual circle R8 when viewed from above. As a result, a stable magnetic flux is generated in the plurality of permanent magnets 8 due to the magnetic field, and when an earthquake occurs, there is a relative displacement in the horizontal direction between the upper and lower foundation structures. When this occurs, a restoring force is generated between the upper foundation structure and the lower foundation structure that attempts to restore the relative displacement in the horizontal direction.
Further, the N poles and S poles of the plurality of permanent magnets 8 are separated along the radial direction, which is a direction extending radially from the magnet virtual vertical axis Z8 when viewed from above, and the plurality of permanent magnets are held in a pair of upper and lower sides when viewed from above. Since the outer poles along the radial direction of the plurality of permanent magnets 8 held by the material 9 are arranged so as to become N poles and S poles alternately along the magnet virtual circle R8, it is stabilized by the magnetic field. magnetic flux is generated in the plurality of permanent magnets 8, and when an earthquake or the like occurs and a horizontal relative displacement occurs between the upper and lower foundation structures, horizontal displacement occurs between the upper and lower foundation structures. A restoring force is generated that attempts to restore the relative displacement in the direction.
Further, since the pair of upper and lower internal magnetic pole blocks 11a are arranged so that the plurality of permanent magnets 8 of the upper and lower pairs are arranged from the inside along the inner contour surrounding the gap formed in the center when viewed from above, the permanent magnets 8 passes through the internal magnetic pole block 11a, and when an earthquake or the like occurs and a relative displacement occurs between the upper and lower foundation structures in the horizontal direction, the An additional restoring force is generated that attempts to restore the relative displacement in the horizontal direction.
In addition, since the pair of upper and lower external magnetic pole blocks 11b are arranged so as to follow the outer contour, which is the contour that the plurality of permanent magnets 8 of the upper and lower pairs follow from the outside, the magnetic flux that attracts the permanent magnets 8 is transmitted to the external magnetic poles. When a horizontal relative displacement occurs between the upper foundation structure and the lower foundation structure due to an earthquake, etc., the block 11b passes through the block 11b. More resilience is generated to try to restore the original state.
Further, the plurality of intermediate magnetic pole blocks 11c are spaced apart by a predetermined distance in the vertical direction between the lower parts of the plurality of upper permanent magnets 8u, which are the plurality of upper and lower permanent magnets 8, and the upper parts of the plurality of lower permanent magnets 8d. The intermediate magnetic pole block 11c is arranged along a virtual circle centered on the virtual vertical axis of the intermediate magnetic pole block 11c, which is a virtual vertical axis when viewed from above with a gap Gap, and is a virtual vertical axis Z8 of a pair of upper and lower magnets when viewed from above. Since the positions of the plurality of permanent magnets 8 and the positions of the plurality of intermediate magnetic pole blocks are made to overlap with each other when the virtual vertical axis of the intermediate magnetic pole block 11c is made to coincide with When a relative displacement occurs between the upper and lower foundation structures in the horizontal direction due to an earthquake, etc., the relative displacement in the horizontal direction between the upper and lower foundation structures is restored. There will be more resilience to do so.
In addition, since the plug 6a made of an elastoplastic material is supported at its upper end by the upper foundation structure and its lower end by the lower foundation structure in a horizontally incompatible manner, the upper and lower foundation structures can When a horizontal relative displacement occurs between the plug 6a and the plug 6a, the plug 6a is sheared and generates a horizontal resistance force in response to the horizontal relative displacement.
In addition, since the protective material 6 covers the outer periphery of the axial force bearing mechanism and the horizontal restoring force acting mechanism 10b, relative displacement in the horizontal direction occurs between the upper and lower foundation structures when an earthquake or the like occurs. At this time, the protective member 6 can suppress the movement of the axial force support mechanism or the horizontal restoring force applying mechanism 10b.
In addition, in the seismic isolation device unit, one axial force bearing mechanism and one horizontal restoring force applying mechanism 10b are arranged in parallel along the vertical direction, and M seismic isolation device units and (M- 1) The multiple intermediate foundation structures are arranged alternately in the vertical direction, so when an earthquake occurs and relative displacement occurs between the upper and lower foundation structures in the horizontal direction, the multi-stage The M base isolation device units overlapping each other apply a horizontal restoring force while allowing relative movement in the horizontal direction.
In addition, since multiple bearings in the bearing unit support the supported structure, when an earthquake occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the bearing unit will move horizontally. Supports the load while allowing relative movement in the direction.
In addition, since the laminated rubber bearing supports the supported structure, when an earthquake occurs and a relative displacement occurs in the horizontal direction between the upper and lower foundation structures, the laminated rubber bearing supports the supported structure. Supports the load while allowing relative movement.
Since the other of the axial force support mechanism 10a and the horizontal restoring force acting mechanism 10b is arranged to fit into the hollow space H formed in the center of one when viewed from above, a compact structure with restoring force due to the permanent magnet 8 is constructed. A seismic isolation device can be provided.

The present invention is not limited to the embodiments described above, and various changes can be made without departing from the gist of the invention.
The seismic isolation device according to the embodiment of the present invention is not limited to the seismic isolation device according to the first to sixth embodiments. For example, the elements constituting the seismic isolation device according to the first to sixth embodiments may be arbitrarily combined.
In the description of the embodiment of the present invention, a configuration was described in which the horizontal restoring force generation mechanism 10b fits into the hollow space H formed in the center of the axial force support mechanism 10a when viewed from above, but the present invention is not limited to this. For example, the axial force bearing mechanism 10a and the horizontal restoring force generating mechanism may be configured to fit in a hollow space H formed in the center of the horizontal restoring force generating mechanism 10b when viewed from above. 10b may be arranged next to each other.
Although the example in which the axial force support mechanism 10a is a bearing unit or a laminated rubber support has been described, the present invention is not limited thereto. For example, the axial force support mechanism 10a may be an air damper. For example, the axial force support mechanism 10a may be composed of linear guides crossed in an X shape when viewed from the receiving end.

ME Seismic isolation layer N N pole of magnet S S pole of magnet AB Anchor bolt SB Stud bolt FB Foundation U Seismic isolation device unit
H Hollow space I Gap G Gap SP Metal plate RP Elastoplastic plate
X Horizontal X-axis Y Horizontal Y-axis Z8 Magnet virtual vertical axis R8 Magnet virtual circle Z1 Bearing virtual vertical axis R1 Bearing virtual circle Z11 Intermediate magnetic pole block vertical axis R11 Intermediate magnetic pole block virtual circle 1 Rolling element 2 Rolling element holding material (retainer)
3 Axial force receiving material 4 Flange plate 5 Connection bolt hole 6 Protective material 6a Plug 7 Bolt 8 Permanent magnet 8u Upper permanent magnet 8d Lower permanent magnet 9 Permanent magnet holding material 9a Permanent magnet holding material 10 Seismic isolation device 10a Axial force support mechanism 10b Horizontal restoring force action mechanism 11 Magnetic pole block 11a Internal magnetic pole block 11b External magnetic pole block 11c Intermediate magnetic pole block 12 Connection plate

JP2000-304088 Japanese Patent Application Publication No. 11-336756

Claims (24)

A seismic isolation device provided in a seismic isolation layer formed between a supporting structure and a supported structure,
a pair of upper and lower foundation structures having an upper foundation structure that supports a supported structure and a lower foundation structure that is supported by the support structure;
an axial force support mechanism that is supported by the lower foundation structure, supports the upper foundation structure so as to be relatively movable in the horizontal direction, and supports a vertical load;
a horizontal restoring force acting mechanism that is supported by the lower foundation structure and applies a horizontal restoring force that is a horizontal force to the upper foundation structure;
Equipped with
The horizontal restoring force acting mechanism includes a plurality of pairs of upper and lower permanent magnets that are divided into upper and lower parts and a plurality of lower permanent magnets, and a pair of upper and lower permanent magnets made of a magnetic material. A gap is provided between the lower part of the magnet and the upper part of the plurality of lower permanent magnets by a predetermined distance in the vertical direction, and the virtual vertical axis of the pair of upper and lower magnets is the virtual vertical axis when viewed from above. and a permanent magnet holding material that holds the magnet along a virtual virtual circle of the magnet.
When the virtual vertical axes of the upper and lower pairs of magnets are aligned when viewed from above, the positions of the plurality of upper permanent magnets and the positions of the plurality of lower permanent magnets arranged along the virtual magnet circle overlap each other, and generating a magnetic field so that the plurality of upper permanent magnets and the plurality of lower permanent magnets whose positions overlap when viewed from above attract each other;
A seismic isolation device characterized by: The horizontal restoring force acting mechanism includes a plurality of pairs of upper and lower permanent magnets, which are divided into upper and lower parts, and a plurality of upper and lower permanent magnets made of a magnetic material. A concentric circle centered on an imaginary vertical axis of the pair of upper and lower magnets, which is an imaginary vertical axis when viewed from above, with a gap spaced apart by a predetermined distance in the vertical direction between the lower part of the magnet and the upper part of the plurality of lower permanent magnets. and a permanent magnet holding material that holds the magnets along a plurality of virtual magnet circles, which are virtual circles arranged in a shape.
The seismic isolation device according to claim 1, characterized in that: N poles and S poles of the plurality of pairs of upper and lower permanent magnets arranged along the virtual magnet circle are separated along the up and down direction,
When viewed from above, the upper poles of the plurality of pairs of upper and lower permanent magnets are arranged so as to alternately become N poles and S poles along the virtual magnet circle,
The seismic isolation device according to claim 2, characterized in that: N and S poles of the plurality of pairs of upper and lower permanent magnets arranged along the virtual magnet circle are separated along a radial direction that is a direction extending radially from the virtual vertical axis of the magnet when viewed from above. ,
When viewed from above, outer poles along the radial direction of the plurality of pairs of upper and lower permanent magnets are arranged so as to alternately become N poles and S poles along the virtual magnet circle,
The seismic isolation device according to claim 3, characterized in that: A pair of upper and lower permanent magnets form a gap surrounded by an internal contour in the center when viewed from above,
The horizontal restoring force acting mechanism includes a plurality of pairs of upper and lower permanent magnets, a pair of upper and lower permanent magnet holding members, and a magnetic pole block that is a block made of a magnetic material, and the internal contour when viewed from above. A pair of upper and lower internal magnetic pole blocks arranged along the inside,
The seismic isolation device according to claim 4, characterized in that: When viewed from above, the plurality of upper and lower pairs of permanent magnets have an outer contour that is a contour that is followed from the outside,
The horizontal restoring force acting mechanism includes a plurality of pairs of upper and lower permanent magnets, a pair of upper and lower permanent magnet holding members, and a magnetic pole block that is a block made of a magnetic material, and is arranged on the outer contour when viewed from above. a pair of upper and lower external magnetic pole blocks arranged along the outside;
The seismic isolation device according to claim 5. The horizontal restoring force acting mechanism is
a pair of upper and lower permanent magnets;
a pair of upper and lower permanent magnet holding materials;
A magnetic pole block is a block made of a magnetic material, and a gap is provided between the lower part of the plurality of upper permanent magnets and the upper part of the plurality of lower permanent magnets, each spaced apart by a predetermined distance in the vertical direction. A plurality of intermediate magnetic pole blocks arranged along an intermediate magnetic pole block virtual circle, which is a virtual circle centered on the virtual vertical axis of the intermediate magnetic pole block, which is a virtual vertical axis when viewed from above,
When the virtual vertical axes of the upper and lower pairs of magnets are aligned with the virtual vertical axis of the intermediate magnetic pole block when viewed from above, the positions of the plurality of permanent magnets of the upper and lower pairs arranged along the virtual magnet circle and the intermediate magnetic poles; the positions of the plurality of intermediate magnetic pole blocks arranged along the block virtual circle overlap with each other;
The seismic isolation device according to claim 6, characterized in that: The pair of upper and lower permanent magnet holding members form a through hole that extends vertically around the virtual vertical axis of the magnet,
The horizontal restoring force acting mechanism is made of an elastoplastic material and forms a vertically extending columnar shape, passes through the through hole, and is supported by the upper end at the upper foundation structure and the lower end by the lower foundation structure so as to be immovable in the horizontal direction. having a plug;
The seismic isolation device according to claim 7, characterized in that: A protective material made of flexible material,
Equipped with
The protective material covers the outer periphery of the axial force support mechanism and the horizontal restoring force acting mechanism,
The protective material supports a part of the outer periphery of the axial force support mechanism or the horizontal restoring force acting mechanism,
The seismic isolation device according to claim 8. A pair of upper and lower foundation structures;
M (M=2, 3...) said axial force support mechanisms;
M horizontal restoring force acting mechanisms;
(M-1) connection plates;
Equipped with
When one of the axial force bearing mechanisms and one of the horizontal restoring force acting mechanisms are arranged horizontally, etc., is called a seismic isolation device unit,
M number of said base isolation device units and (M-1) number of said base isolation device units such that two said base isolation device units out of said M number of said base isolation device units are respectively arranged at the upper end and the lower end. The connecting plates are arranged alternately along the vertical direction,
the upper foundation structure is supported at an upper end;
the lower foundation structure supports a lower end;
The seismic isolation device according to claim 9. The axial force support mechanism rotates while being arranged along a virtual bearing circle, which is a virtual circle centered on a virtual bearing vertical axis, which is a virtual vertical axis when the plurality of rolling elements and the plurality of rolling elements are viewed from above. M (M=1, 2...) bearings each having a rolling element holding member that holds the rolling elements so that they can move freely, and a pair of upper and lower axial force receiving members that form a rolling surface on which a plurality of rolling elements roll. has a unit,
The rolling element holding material also serves as an intermediate magnetic pole block support that supports the plurality of intermediate magnetic pole blocks ,
The seismic isolation device according to claim 10. The axial force bearing mechanism has a laminated rubber bearing in which a plurality of elastic-plastic plate materials made of a plurality of elastic-plastic materials and a plurality of metal plate materials made of metal alternately overlap in the vertical direction,
The metal plate material also serves as an intermediate magnetic pole block supporter that supports the plurality of intermediate magnetic pole blocks,
The seismic isolation device according to claim 11. When viewed from above, either the axial force support mechanism or the horizontal restoring force acting mechanism forms a hollow space in the center,
Either the axial force support mechanism or the horizontal restoring force applying mechanism is accommodated in the hollow space;
13. The seismic isolation device according to claim 12. N poles and S poles of the plurality of pairs of upper and lower permanent magnets arranged along the virtual magnet circle are separated along the up and down direction,
When viewed from above, the upper poles of the plurality of pairs of upper and lower permanent magnets are arranged so as to alternately become N poles and S poles along the virtual magnet circle,
The seismic isolation device according to claim 1, characterized in that: N and S poles of the plurality of pairs of upper and lower permanent magnets arranged along the virtual magnet circle are separated along a radial direction that is a direction extending radially from the virtual vertical axis of the magnet when viewed from above. ,
When viewed from above, outer poles along the radial direction of the plurality of pairs of upper and lower permanent magnets are arranged so as to alternately become N poles and S poles along the virtual magnet circle,
The seismic isolation device according to claim 1, characterized in that: A pair of upper and lower permanent magnets form a gap surrounded by an internal contour in the center when viewed from above,
The horizontal restoring force acting mechanism includes a plurality of pairs of upper and lower permanent magnets, a pair of upper and lower permanent magnet holding members, and a magnetic pole block that is a block made of a magnetic material, and the internal contour when viewed from above A pair of upper and lower internal magnetic pole blocks arranged along the inside,
The seismic isolation device according to claim 1, characterized in that: When viewed from above, the pair of upper and lower permanent magnets have an outer contour that is a contour that is followed from the outside,
The horizontal restoring force acting mechanism includes a plurality of pairs of upper and lower permanent magnets, a pair of upper and lower permanent magnet holding members, and a magnetic pole block that is a block made of a magnetic material, and is arranged on the outer contour when viewed from above. a pair of upper and lower external magnetic pole blocks arranged along the outside;
The seismic isolation device according to claim 1, characterized in that: The horizontal restoring force acting mechanism includes a plurality of pairs of upper and lower permanent magnets, a pair of upper and lower permanent magnet holding members, and a magnetic pole block that is a block made of a magnetic material, the lower portions of the plurality of upper permanent magnets. A gap is provided between the upper part of the plurality of lower permanent magnets and a predetermined distance in the vertical direction, and an imaginary intermediate pole block whose center is an imaginary vertical axis, which is an imaginary vertical axis when viewed from above, is provided. A plurality of intermediate magnetic pole blocks arranged along a circular intermediate magnetic pole block virtual circle,
When the virtual vertical axes of the upper and lower pairs of magnets are aligned with the virtual vertical axis of the intermediate magnetic pole block when viewed from above, the positions of the plurality of permanent magnets of the upper and lower pairs arranged along the virtual magnet circle and the intermediate magnetic poles; The positions of the plurality of intermediate magnetic pole blocks arranged along the block virtual circle overlap with each other,
The seismic isolation device according to claim 1, characterized in that: The pair of upper and lower permanent magnet holding members form a through hole that extends vertically around the virtual vertical axis of the magnet,
The horizontal restoring force acting mechanism is made of an elastoplastic material and forms a vertically extending columnar shape, passes through the through hole, and is supported by the upper end at the upper foundation structure and the lower end by the lower foundation structure so as to be immovable in the horizontal direction. having a plug;
The seismic isolation device according to claim 1, characterized in that: A protective material made of flexible material,
Equipped with
The protective material covers the outer periphery of the axial force support mechanism and the horizontal restoring force acting mechanism,
The protective material supports a part of the outer periphery of the axial force support mechanism or the horizontal restoring force acting mechanism,
The seismic isolation device according to claim 1, characterized in that: A pair of upper and lower foundation structures;
M (M=2, 3...) said axial force support mechanisms;
M horizontal restoring force acting mechanisms;
(M-1) connection plates;
Equipped with
When one of the axial force bearing mechanisms and one of the horizontal restoring force acting mechanisms are arranged in parallel in the horizontal direction, it is referred to as a seismic isolation device unit;
M number of said base isolation equipment units and (M-1) number of said base isolation equipment units such that two said base isolation equipment units out of said M number of said base isolation equipment units are respectively arranged at the upper end and the lower end. The connecting plates are arranged alternately along the vertical direction,
the upper foundation structure is supported at an upper end;
the lower foundation structure supports a lower end;
The seismic isolation device according to claim 1, characterized in that: The axial force support mechanism rotates while being arranged along a virtual bearing circle, which is a virtual circle centered on a virtual bearing vertical axis, which is a virtual vertical axis when the plurality of rolling elements and the plurality of rolling elements are viewed from above. M (M=1, 2...) bearings each having a rolling element holding member that holds the rolling elements so that they can move freely, and a pair of upper and lower axial force receiving members that form a rolling surface on which a plurality of rolling elements roll. has a unit,
The rolling element holding material also serves as an intermediate magnetic pole block support that supports the plurality of intermediate magnetic pole blocks ,
The seismic isolation device according to claim 18. The axial force bearing mechanism has a laminated rubber bearing in which a plurality of elastic-plastic plate materials made of a plurality of elastic-plastic materials and a plurality of metal plate materials made of metal alternately overlap in the vertical direction,
The metal plate material also serves as an intermediate magnetic pole block supporter that supports the plurality of intermediate magnetic pole blocks,
The seismic isolation device according to claim 18. When viewed from above, either the axial force support mechanism or the horizontal restoring force acting mechanism forms a hollow space in the center,
Either the axial force support mechanism or the horizontal restoring force applying mechanism is accommodated in the hollow space;
The seismic isolation device according to claim 1, characterized in that: