JP2017115960A - Base isolation mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation mechanism that can be made small in size and have a movable element that can be prevented from being removed out of an upper guide member and a lower guide member.SOLUTION: A first upper slant surface 211 is formed into a plane that gradually faces downward to one side in a direction X, a second upper slant surface 212 is formed into a plane that gradually faces downward to the other side in a direction X, a third upper slant surface 213 is formed into a plane that gradually faces downward at a larger graduation than that of the first upper slant surface 211, the fourth upper slant surface 214 is formed into a plane that gradually faces downward at a larger graduation than that of the second upper slant surface 212. A first lower slant surface 311 is formed into a plane that gradually faces upward to one side in a direction Y, a second lower slant surface 312 is formed into a plane that gradually faces upward to the other side in a direction Y, a third lower slant surface 313 is formed into a plane that gradually faces upward at a larger graduation than that of the first lower slant surface 311, and a fourth lower slant surface 314 is formed into a plane that gradually faces upward at a larger graduation than that of the second lower slant surface 312.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seismic isolation mechanism for supporting seismic isolation objects such as buildings and precision equipment.

  Conventionally, seismic isolation mechanisms for preventing (suppressing) earthquake damage to buildings and precision equipment are known. For example, in Patent Document 1, a mover that serves as a slider between an upper guide member that is fixed to the bottom of an upper structure to be seismically isolated and a lower guide member that is fixed to the upper part of the lower structure. A seismic isolation mechanism is disclosed. In this seismic isolation mechanism, the sliding surface between the mover and the upper guide member is formed in an inclined surface having an inverted V shape along one horizontal direction, and the sliding surface between the mover and the lower guide member is It is formed in the inclined surface which becomes V shape along the other horizontal direction orthogonal to one horizontal direction. By moving the mover along the inclined surface, it is possible to reduce acceleration, attenuate vibrations, and recover displacement when an earthquake occurs.

JP 2013-130216 A

However, when the response displacement due to the earthquake exceeds the assumption, there is a possibility that the mover moves greatly with respect to the upper guide member and the lower guide member, and the mover is detached from the upper guide member and the lower guide member. Further, there is a possibility that the mover may be detached from the upper guide member and the lower guide member due to an external force from one direction due to wind or the like for a long time.
On the other hand, it is conceivable to lengthen the upper guide member and the lower guide member in the direction of relative displacement with the mover. However, there is a problem that the seismic isolation mechanism is enlarged and the installation space is increased.

  Then, an object of this invention is to provide the seismic isolation mechanism which can prevent that a needle | mover remove | deviates from an upper guide member and a lower guide member, and can be reduced in size.

  In order to achieve the above object, a seismic isolation mechanism according to the present invention is fixed to the bottom of the upper structure in a seismic isolation mechanism provided between an upper structure and a lower structure that are relatively displaceable in a horizontal direction. An upper guide member, a lower guide member fixed to the upper portion of the lower structure, and the upper guide member and the lower guide member, and is relatively displaced in the same horizontal direction as the upper guide member. The lower guide member and a movable element that is relatively displaceable in another horizontal direction orthogonal to the one horizontal direction, and the upper guide member is an upper contact with which the movable element abuts. A first upper inclined surface disposed on one side of the one horizontal direction from the upper central portion serving as the one horizontal central portion, and the upper central portion. The second upper portion disposed on the other horizontal side of the one An inclined surface, a third upper inclined surface arranged on one side in the one horizontal direction from the first upper inclined surface, and an other side in the one horizontal direction from the second upper inclined surface A fourth upper inclined surface, wherein the first upper inclined surface is formed in a plane gradually going downward from the upper central portion toward one side of the one horizontal direction, and the second upper inclined surface The surface is formed in a plane gradually going downward from the upper central portion toward the other side in the one horizontal direction, and the third upper inclined surface is formed in the first horizontal direction toward the one side in the one horizontal direction. 1 is formed in a plane gradually going downward with a larger gradient than the upper inclined surface, and the fourth upper inclined surface gradually increases with a larger gradient than the second upper inclined surface toward the other side in the one horizontal direction. Formed in a plane facing downward, the lower part The inner member has a lower abutting surface with which the movable element abuts, and the lower abutting surface is arranged on the one side in the other horizontal direction from the lower central portion serving as the other horizontal central portion. The first lower inclined surface, the second lower inclined surface disposed on the other side in the other horizontal direction from the lower central portion, and the one other side in the other horizontal direction than the first lower inclined surface. A third lower inclined surface, and a fourth lower inclined surface disposed on the other side in the other horizontal direction than the second lower inclined surface, and the first lower inclined surface is The second lower inclined surface is formed from the lower central portion toward the other side in the other horizontal direction. The second lower inclined surface is formed from the lower central portion toward the other side in the other horizontal direction. And the third lower inclined surface is formed in one of the other horizontal directions. The fourth lower inclined surface is formed on a plane gradually going upward with a larger gradient than the first lower inclined surface toward the side, and the fourth lower inclined surface is more than the second lower inclined surface toward the other side in the other horizontal direction. The movable element is formed in a plane gradually going upward with a large gradient, and the mover includes a main body, a first upper abutting member fixed to the main body and capable of abutting on the first upper inclined surface, and the main body A second upper abutting member fixed to the portion and capable of contacting the second upper inclined surface; a third upper abutting member fixed to the main body portion and capable of contacting the third upper inclined surface; A fourth upper abutting member fixed to the main body and capable of contacting the fourth upper inclined surface, and a first lower abutting member fixed to the main body and capable of contacting the first lower inclined surface And a second lower abutting member fixed to the main body and capable of abutting on the second lower inclined surface A third lower contact member fixed to the main body portion and capable of contacting the third lower inclined surface; and a fourth lower contact member fixed to the main body portion and capable of contacting the fourth lower inclined surface. In an initial state, the mover is disposed below the upper central portion, the first upper contact member contacts the first upper inclined surface, and the second upper contact A contact member abuts on the second upper inclined surface, the third upper abutment member and the fourth upper abutment member are separated from the upper abutment surface, and the mover is located above the lower central portion. The first lower contact member is in contact with the first lower inclined surface, the second lower contact member is in contact with the second lower inclined surface, the third lower contact member, and the The fourth lower contact member is separated from the lower contact surface, and the first guide member is moved relative to the upper guide member from the initial state. The first upper abutting member abuts against the first upper inclined surface and the third upper abutting member contacts the third upper inclined surface. The first upper contact member is in contact with the first upper inclined surface until the second upper contact member, the third upper contact member, and the fourth upper contact are in contact with each other. A member is separated from the upper abutment surface, and is displaced relative to the upper guide member from the initial state toward the other side in the one horizontal direction with respect to the upper guide member, and the second upper abutment member Until the fourth upper abutting member abuts on the fourth upper inclined surface and the second upper abutting member abuts on the second upper inclined surface. , The first upper contact member, the third upper contact member, and the fourth upper A first abutting member that abuts against the first upper inclined surface, and a third upper abutting member that contacts the third upper inclined surface. From the state, when the relative displacement with respect to the upper guide member toward the one side in the one horizontal direction with respect to the upper guide member, the third upper abutment member abuts on the third upper inclined surface, The first upper contact member, the second upper contact member, and the fourth upper contact member are separated from the upper contact surface, and the second upper contact member is in contact with the second upper inclined surface. And when the fourth upper abutting member is displaced relative to the upper guide member from the state in which the fourth upper abutting member is in contact with the fourth upper inclined surface toward the other side in the one horizontal direction with respect to the upper guide member, The fourth upper abutting member abuts on the fourth upper inclined surface, The upper abutting member, the second upper abutting member, and the third upper abutting member are separated from the upper abutting surface, and the other horizontal direction side of the lower guiding member from the initial state Until the first lower abutting member comes into contact with the first lower inclined surface and the third lower abutting member comes into contact with the third lower inclined surface. The first lower contact member is in contact with the first lower inclined surface, and the second lower contact member, the third lower contact member, and the fourth lower contact member are in the lower contact. The second lower abutting member is moved away from the surface and relatively displaced from the initial state relative to the lower guide member toward the other side in the other horizontal direction. The fourth lower contact member is in contact with the surface and the fourth lower contact member is inclined The second lower abutting member abuts on the second lower inclined surface until the second lower abutting member abuts on the surface, the first lower abutting member, the third lower abutting member, and the fourth lower abutting surface. The member is separated from the lower contact surface, the first lower contact member is in contact with the first lower inclined surface and the third lower contact member is in contact with the third lower inclined surface, When the lower guide member is displaced relative to the lower guide member so as to be directed to one side in the other horizontal direction, the third lower contact member comes into contact with the third lower inclined surface, and the first lower portion The abutting member, the second lower abutting member, and the fourth lower abutting member are separated from the lower abutting surface, and the second lower abutting member abuts on the second lower inclined surface and the first 4 From the state in which the lower contact member is in contact with the fourth lower inclined surface, the lower guide member On the other hand, when the relative displacement with the lower guide member toward the other side in the other horizontal direction, the fourth lower contact member contacts the fourth lower inclined surface, the first lower contact member, The second lower contact member and the third lower contact member are separated from the lower contact surface.

  In the present invention, since the gradient of the third upper inclined surface is larger than the gradient of the first upper inclined surface, the movable element and the upper guide are arranged such that the movable element is directed to one side in one horizontal direction with respect to the upper guide member. When the relative displacement between the movable member and the member moves along the first upper inclined surface, the movable member moves along the third upper inclined surface, so that the relative displacement between the movable member and the upper guide member is reduced. Therefore, it is possible to prevent the mover from coming off to one side in the horizontal direction of the upper guide member. Since the gradient of the fourth upper inclined surface is larger than the gradient of the second upper inclined surface, the mover and the upper guide member are relative to each other so that the mover faces the other side of the one horizontal direction with respect to the upper guide member. Since the mover that has moved along the second upper inclined surface moves along the fourth upper inclined surface when displaced, the relative displacement between the mover and the upper guide member is decelerated. Can be prevented from coming off to the other horizontal side of the upper guide member.

Further, the relative displacement between the mover and the lower guide member is also movable because the gradient of the third lower inclined surface is larger than the gradient of the first lower inclined surface, similar to the relative displacement between the mover and the upper guide member. When the mover and the lower guide member are displaced relative to each other so that the child is directed to one side in the other horizontal direction with respect to the lower guide member, the mover moved along the first lower inclined surface is the third lower portion. By moving along the inclined surface, the relative displacement between the mover and the lower guide member is decelerated, so that the mover can be prevented from coming off to the other side in the other horizontal direction of the lower guide member. Since the gradient of the fourth lower inclined surface is larger than the gradient of the second lower inclined surface, the mover and the lower guide member are relative to each other so that the mover faces the other side in the other horizontal direction with respect to the lower guide member. When the mover moves, the mover that has moved along the second lower inclined surface moves along the fourth lower inclined surface, so that the relative displacement between the mover and the lower guide member is decelerated. Can be prevented from coming off to the other side in the other horizontal direction of the lower guide member.
Moreover, since it is not necessary to lengthen the upper guide member and the lower guide member in the direction of relative displacement with the mover, the seismic isolation mechanism can be reduced in size.

  In the seismic isolation mechanism according to the present invention, the first upper abutting member, the second upper abutting member, the third upper abutting member, and the fourth upper abutting member may have the upper abutting surface. The first lower abutting member, the second lower abutting member, the third lower abutting member, and the fourth lower abutting member are formed of slidable sliding members. You may be comprised with the sliding member which can slide.

  With this configuration, the first upper contact member, the second upper contact member, the third upper contact member, and the fourth upper contact member can roll on the upper contact surface. It is comprised with a member, and the load resistance per 1st lower contact member, 2nd lower contact member, 3rd lower contact member, and 4th lower contact can be enlarged.

  In the seismic isolation mechanism according to the present invention, the first upper abutting member and the second upper abutting member are constituted by sliding members that can slide on the upper abutting surface, and the third upper abutting member. The contact member and the fourth upper contact member are configured by a rolling member capable of rolling on the upper contact surface, and the first lower contact member and the second lower contact member are the lower contact. The third lower contact member and the fourth lower contact member may be formed of a rolling member capable of rolling on the lower contact surface. .

With this structure, when the mover moves from the lower side of the first upper inclined surface to the lower side of the third upper inclined surface and the third upper abutting member comes into contact with the third upper inclined surface. Moreover, since the impact of this contact can be absorbed by the rolling of the third upper abutting member, the relative displacement between the mover and the upper guide member can be performed smoothly. When the mover moves from the lower side of the second upper inclined surface to the lower side of the fourth upper inclined surface and the fourth upper abutting member comes into contact with the fourth upper inclined surface, the impact of this contact is transferred to the fourth upper portion. Since the contact member can be absorbed by rolling, the mover and the upper guide member can be smoothly displaced relative to each other.
In addition, regarding the relative displacement between the mover and the lower guide member, the mover moves from the upper side of the first lower inclined surface to the upper side of the third lower inclined surface in the same manner as the relative displacement between the mover and the upper guide member. When the third lower abutting member comes into contact with the third lower inclined surface, the impact of this contact can be absorbed by the rolling of the third lower abutting member. Relative displacement can be performed smoothly. When the mover moves from the upper side of the second lower inclined surface to the upper side of the fourth lower inclined surface and the fourth lower abutting member comes into contact with the fourth lower inclined surface, the impact of this contact is applied to the fourth lower abutting surface. Since the member can be absorbed by rolling, the mover and the lower guide member can be smoothly displaced relative to each other.
Further, since the rolling member has a smaller coefficient of friction with the rolling surface (sliding surface) than the sliding member, the mover can be easily restored to the initial state.

  In the seismic isolation mechanism according to the present invention, the third upper contact member, the fourth upper contact member, the third lower contact member, and the rolling member constituting the fourth lower contact member are It is preferable to have a damping material that attenuates the impact of contact with the rolling surface.

  With such a configuration, the third upper abutting member and the fourth upper abutting member can absorb the impact of the contact with the upper inclined surface, so that the mover and the upper guide member are smoothly relative to each other. Can be displaced. Further, since the third lower contact member and the fourth lower contact member can absorb the impact of the contact with the lower inclined surface, the movable element and the lower guide member can be smoothly displaced relative to each other.

Further, in the seismic isolation mechanism according to the present invention, the first upper inclined surface and the third upper inclined surface are disposed at positions shifted in the other horizontal direction, and the first upper inclined surface is arranged on the first upper inclined surface. A first upper overlapping range in which a portion on one side in one horizontal direction and a portion on the other side in the first horizontal direction of the third upper inclined surface overlap each other when viewed from the other horizontal direction, In a state where the mover is positioned below the first upper overlapping range, the first upper contact member contacts the first upper inclined surface and the third upper contact member is the third upper portion. The second upper contact member and the fourth upper contact member are separated from the upper contact surface, and the second upper inclined surface and the fourth upper inclined surface are in contact with the other horizontal surface. And the other one of the one horizontal direction of the second upper inclined surface is disposed at a position shifted in the direction And a portion of the fourth upper inclined surface on one side in the one horizontal direction overlap with each other when viewed from the other horizontal direction, and the mover has the second upper portion. In a state of being positioned below the overlapping range, the second upper contact member contacts the second upper inclined surface, and the fourth upper contact member contacts the fourth upper inclined surface, The first upper abutting member and the third upper abutting member are separated from the upper abutting surface, and the first lower inclined surface and the third lower inclined surface are arranged at positions shifted in the one horizontal direction. And the other horizontal portion of the first lower inclined surface and the other horizontal portion of the third lower inclined surface are viewed from the one horizontal direction. A first lower overlapping range, and the mover is positioned above the first lower overlapping range. The first lower contact member is in contact with the first lower inclined surface and the third lower contact member is in contact with the third lower inclined surface, and the second lower contact member and the first lower contact member are in contact with each other. 4 lower abutting members are separated from the lower abutting surface, the second lower inclined surface and the fourth lower inclined surface are disposed at a position shifted in the one horizontal direction, and the second lower inclined surface A second lower overlapping range in which the other horizontal portion of the surface overlaps with the other horizontal portion of the fourth lower inclined surface as viewed from the one horizontal direction. In a state where the mover is positioned above the second lower overlapping range, the second lower contact member contacts the second lower inclined surface and the fourth lower contact member is 4. The first lower contact member and the third lower contact member are in contact with the lower inclined surface. May be separated from the lower contact surface.
By adopting such a configuration, the relative displacement between the mover and the upper guide member can be achieved by adjusting the dimensions of the first upper overlapping range, the second upper overlapping range, the third upper overlapping range, and the fourth upper overlapping range. Since the relative displacement between the mover and the lower guide member can be decelerated at a desired position, the relative displacement between the mover and the upper guide member and the relative displacement between the mover and the lower guide member can be reduced at an early stage. It can be carried out.

  According to the present invention, it is possible to prevent the mover from being detached from the upper guide member and the lower guide member, and it is possible to reduce the size of the seismic isolation mechanism.

It is the model which shows an example which looked at the seismic isolation mechanism by 1st Embodiment of this invention from the Y direction. It is the schematic diagram which shows an example which looked at the seismic isolation mechanism by 1st Embodiment of this invention from the X direction. It is a disassembled perspective view which shows an example of the seismic isolation mechanism by 1st Embodiment of this invention. It is a top view of the seismic isolation mechanism by 1st Embodiment of this invention. It is the perspective view which looked at the needle | mover from the upper side. It is the perspective view which looked at the needle | mover from the lower side. It is the sectional view on the AA line of FIG. It is a B direction arrow directional view of FIG. It is a figure explaining a mode that a mover is located above the 1st lower part inclined surface. It is a figure explaining a mode that a mover is located above the 3rd lower part inclined surface. It is a figure explaining a mode that a needle | mover is located above a 2nd lower inclined surface. It is a figure explaining a mode that a needle | mover is located above a 4th lower inclined surface. It is a figure explaining a mode that a mover is located above the 1st upper part inclined surface. It is a figure explaining a mode that a mover is located above the 3rd upper part inclined surface. It is a figure explaining a mode that a mover is located above the 2nd upper part inclined surface. It is a figure explaining a mode that a mover is located above the 4th upper inclined surface. (A) is a diagram for explaining the seismic isolation mechanism and its own weight in the initial state, (b) is a diagram for explaining the seismic isolation mechanism and restoring force when the mover is located below the first upper inclined surface, (c) ) Is a diagram for explaining the seismic isolation mechanism and the restoring force when the mover is positioned below the third upper inclined surface. It is a figure explaining a restoring force characteristic (load-deformation relationship). (A) is the perspective view which looked at the needle | mover of the seismic isolation mechanism by 2nd Embodiment of this invention from the upper side, (b) is CC sectional view taken on the line of (a), (c) is D of (a). FIG. It is sectional drawing orthogonal to the axis line of a roller. (A) is a schematic diagram which shows an example which looked at the seismic isolation mechanism by 1st Embodiment of this invention from the Y direction, (b) is an example which looked at the seismic isolation mechanism by 1st Embodiment of this invention from the X direction. It is a schematic diagram shown. (A) is the figure which looked at the upper guide member from the bottom, (b) is the figure which looked at the lower guide member from the top. (A) is the perspective view which looked at the needle | mover from the upper side, (b) is the perspective view which looked at the needle | mover from the lower side. It is a figure explaining a mode that a mover is located in the upper part of the 1st lower part inclined surface and the 2nd lower part inclined surface. It is a figure explaining a mode that a mover is located in the upper part of the 1st lower pile range, the 3rd lower slope, the 2nd lower pile range, and the 4th lower slope. It is a figure explaining a mode that a mover is located under the 1st upper slope and the 2nd upper slope. It is a figure explaining a mode that a mover is located in the 1st upper overlapping range, the 3rd upper inclined surface, the 2nd upper overlapping range, and the 4th upper inclined surface.

(First embodiment)
Hereinafter, a seismic isolation mechanism according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the seismic isolation mechanism 1 </ b> A according to the first embodiment is provided in the seismic isolation layer 13 between the upper structure 11 and the lower structure 12. The lower structure 12 is supported by the ground. The upper structure 11 and the lower structure 12 are configured to be relatively displaceable in the horizontal direction. The seismic isolation layer 13 is provided with a plurality of seismic isolation mechanisms 1A.
The seismic isolation mechanism 1A includes an upper guide member 2 fixed to the bottom of the upper structure 11, a lower guide member 3 disposed below the upper guide member 2 and fixed to the upper portion of the lower structure 12, and an upper guide. And a movable element 4 interposed between the member 2 and the lower guide member 3.
The upper guide member 2 and the lower guide member 3 are configured to be relatively displaceable in the horizontal direction, and the relative displacement in the vertical direction is determined by the relative displacement in the horizontal direction.

As shown in FIGS. 1 to 3, the upper guide member 2 is formed of a long block-like member, and is arranged in a direction in which the longitudinal direction is one horizontal direction (X direction). In the present embodiment, as shown in FIGS. 1 and 2, the upper guide member 2 is fixed to the upper structure 11 via a flat fixed plate portion 22. In FIG. 3, the fixed plate portion 22 is omitted.
As shown in FIGS. 2 and 3, the lower surface of the upper guide member 2 is formed such that a substantially central portion in the X direction is convex upward along the X direction. The lower surface of the upper guide member 2 is referred to as an upper contact surface 21, and the substantially central portion in the X direction of the upper contact surface 21 is referred to as an upper central portion 21 a.
The upper contact surface 21 includes a first upper inclined surface 211 extending from the upper central portion 21a to one side in the X direction, a second upper inclined surface 212 extending from the upper central portion 21a to the other side in the X direction, and a first upper portion A third upper inclined surface 213 extending from one end in the X direction of the inclined surface 211 to one side in the X direction, and an end on the other side in the X direction of the second upper inclined surface 212 from the other end in the X direction. And a fourth upper inclined surface 214 extending.

The first upper inclined surface 211 is formed on a plane that gradually goes downward as it goes from the upper central portion 21a to one side in the X direction. The inclination angle of the first upper inclined surface 211 with respect to the horizontal plane is θ ₁ .
The second upper inclined surface 212 is formed on a plane that gradually goes downward from the upper central portion 21a toward the other side in the X direction. The inclination angle of the second upper inclined surface 212 with respect to the horizontal plane is the same θ ₁ as the inclination angle of the first upper inclined surface 211 with respect to the horizontal plane. The first upper inclined surface 211 and the second upper inclined surface 212 are continuous in the upper central portion 21a.

The third upper inclined surface 213 is formed on a plane that gradually goes downward as it goes to one side in the X direction. The inclination angle of the third upper inclined surface 213 with respect to the horizontal plane is θ ₂ that is larger than the inclination angle θ _{1 of} the first upper inclined surface 211 with respect to the horizontal plane. The first upper inclined surface 211 and the third upper inclined surface 213 are continuous so as to form a predetermined angle.
The fourth upper inclined surface 214 is formed in a plane that gradually goes downward as it goes to the other side in the X direction. The inclination angle of the fourth upper inclined surface 214 with respect to the horizontal plane is larger than the inclination angle θ _{1 of} the second upper inclined surface 212 with respect to the horizontal plane, and is the same θ ₂ as the inclination angle of the third upper inclined surface 213 with respect to the horizontal plane. . The inclination angles θ ₁ and θ ₂ satisfy θ ₂ > θ ₁ .
Each of the first to fourth upper inclined surfaces 214 is provided with a sliding material such as Teflon (registered trademark).

The upper guide member 2 is formed with a pair of stoppers 23 and 23 projecting downward from the upper contact surface 21 at both ends in the X direction, and on the surfaces of the pair of stoppers 23 and 23 facing each other, Cushioning materials 24 and 24 are provided for absorbing shock when the movable element 4 collides with the stoppers 23 and 23. The stoppers 23 and 23 and the cushioning materials 24 and 24 are disposed on the track of the mover 4 when the upper guide member 2 and the mover 4 are relatively displaced.
For example, an elastic body, a viscous body, a viscoelastic body, or the like is used as the cushioning materials 24, 24. Specifically, a vibration-proof rubber, a silicon-based viscous body, a high damping rubber, or the like is used.

As shown in FIGS. 1 to 3, the lower guide member 3 is formed of a block-like member having substantially the same length as the upper guide member 2, and the other horizontal direction (Y It is arranged in the direction that becomes the direction. In the present embodiment, as shown in FIGS. 1 and 2, the lower guide member 3 is fixed to the lower structure 12 via a flat fixed plate portion 32. In FIG. 3, the fixed plate portion 32 is omitted.
As shown in FIGS. 1 and 3, the upper surface of the lower guide member 3 is formed such that a substantially central portion in the Y direction protrudes downward along the Y direction. The upper surface of the lower guide member 3 is defined as a lower contact surface 31, and the substantially central portion in the Y direction of the lower contact surface 31 is defined as a lower central portion 31a.
The lower contact surface 31 includes a first lower inclined surface 311 extending from the lower central portion 31a to one side in the Y direction, a second lower inclined surface 312 extending from the lower central portion 31a to the other side in the Y direction, 1 a third lower inclined surface 313 extending from one end in the Y direction of the lower inclined surface 311 to one side in the Y direction, and another end in the Y direction from the other end in the Y direction of the second lower inclined surface 312 And a fourth lower inclined surface 314 extending to the side.

The first lower inclined surface 311 is formed on a plane that gradually goes upward as it goes from the lower central portion 31a to one side in the Y direction. The inclination angle of the first lower inclined surface 311 with respect to the horizontal plane is θ ₁ .
The second lower inclined surface 312 is formed on a plane that gradually goes upward as it goes from the lower central portion 31a to the other side in the Y direction. The inclination angle of the second lower inclined surface 312 with respect to the horizontal plane is the same θ ₁ as the inclination angle of the first lower inclined surface 311 with respect to the horizontal plane. The first lower inclined surface 311 and the second lower inclined surface 312 are continuous in the lower central portion 31a.

The third lower inclined surface 313 is formed on a plane that gradually goes upward as it goes to one side in the Y direction. The inclination angle of the third lower inclined surface 313 with respect to the horizontal plane is θ ₂ that is larger than the inclination angle θ _{1 of} the first lower inclined surface 311 with respect to the horizontal plane. The first lower inclined surface 311 and the third lower inclined surface 313 are continuous to form a predetermined angle.
The fourth lower inclined surface 314 is formed on a plane that gradually goes upward as it goes to the other side in the Y direction. The inclination angle of the fourth lower inclined surface 314 with respect to the horizontal plane is larger than the inclination angle θ _{1 of} the second lower inclined surface 312 with respect to the horizontal plane, and is the same θ ₂ as the inclination angle of the third lower inclined surface 313 with respect to the horizontal plane. . The inclination angles θ ₁ and θ ₂ satisfy θ ₂ > θ ₁ .
Each of the first to fourth lower inclined surfaces 314 is provided with a sliding material such as Teflon (registered trademark).

The lower guide member 3 is formed with a pair of stoppers 33 and 33 projecting upward from the lower abutment surface 31 at both ends in the Y direction. The pair of stoppers 33 and 33 are movable on the mutually opposing surfaces. Cushioning materials 34 and 34 are provided for absorbing shock when the child 4 collides with the stoppers 33 and 33. The stoppers 33 and 33 and the cushioning materials 34 and 34 are disposed on the track of the mover 4 when the lower guide member 3 and the mover 4 are relatively displaced.
For example, an elastic body, a viscous body, a viscoelastic body, or the like is used as the buffer material 34, 34, and specifically, a vibration-proof rubber, a silicon-based viscous body, a high damping rubber, or the like is used.

  The upper guide member 2 and the lower guide member 3 are arranged so as to overlap each other with an interval in which the movable element 4 is arranged in the vertical direction. As shown in FIG. 4, the mover 4 is disposed at an intersection 5 between the upper guide member 2 and the lower guide member 3 where the upper guide member 2 and the lower guide member 3 overlap in the vertical direction.

As shown in FIGS. 1 to 3 and FIGS. 5 to 8, the mover 4 includes a main body portion 41, first to fourth upper contact members 42 to 45 provided on the upper portion of the main body portion 41, and a main body. First to fourth lower contact members 46 to 49 provided at the lower portion of the portion 41.
The first to fourth upper contact members 42 to 45 are constituted by sliding members that can slide along the upper contact surface 21, and the first to fourth lower contact members 46 to 49 are lower contact surfaces. It is comprised with the sliding member which can slide along 31. FIG.

The main body 41 has a base 411 formed in a substantially rectangular parallelepiped shape, a pair of upper projecting plate portions 412 and 412 (see FIGS. 1 and 3) projecting upward from the base 411, and projecting downward from the base 411. And a pair of lower protruding plate portions 413 and 413 (see FIGS. 2 and 3).
The base 411 is arranged such that the upper surface and the lower surface are each directed in the vertical direction, the pair of opposed side surfaces are directed in the X direction, and the other pair of opposed side surfaces are directed in the Y direction.

The pair of upper protruding plate portions 412 and 412 protrude upward from both ends of the base portion 411 in the Y direction, and each plate surface is formed in a flat plate shape facing the Y direction. Between the pair of upper protruding plate portions 412 and 412, first to fourth upper contact members 42 to 45 are arranged.
Sliding materials 414 and 414 (see FIGS. 1 and 5) such as Teflon (registered trademark) are provided in the vicinity of the upper end portions of the surfaces of the pair of upper protruding plate portions 412 and 412 facing each other.
When the vicinity of the upper end of each of the pair of upper protruding plate portions 412 and 412 protrudes above the first to fourth upper contact members 42 to 45, and the movable element 4 is disposed below the upper guide member 2. The upper guide member 2 is disposed on the side of the upper guide member 2 so as to sandwich the upper guide member 2 from both sides in the Y direction, and the sliding members 414 and 414 provided on the upper guide member 2 are in contact with the side surfaces of the upper guide member 2. Yes.

The pair of lower protruding plate portions 413 and 413 protrudes downward from both ends of the base portion 411 in the X direction, and each plate surface is formed in a flat plate shape facing the X direction. Between the pair of lower projecting plate portions 413 and 413, first to fourth lower contact members 46 to 49 are disposed.
Sliding materials 415 and 415 (see FIGS. 2 and 6) such as Teflon (registered trademark) are provided in the vicinity of the lower end portions of the opposing surfaces of the pair of lower protruding plate portions 413 and 413, respectively.
When the vicinity of the lower end of each of the pair of lower protruding plate portions 413 and 413 protrudes below the first to fourth lower contact members 46 to 49 and the movable element 4 is disposed above the lower guide member 3. The lower guide member 3 is disposed on the side of the lower guide member 3 so as to sandwich the lower guide member 3 from both sides in the X direction, and the sliding members 415 and 415 provided on the lower guide member 3 are in contact with the side surfaces of the lower guide member 3. Yes.

As shown in FIGS. 2, 3, 5 and 7, the first to fourth upper contact members 42 to 45 are each formed in a substantially plate shape, and one plate surface 42 a to 45 a is the upper contact surface 21. The other plate surface side is fixed to the main body 41. These one plate surfaces 42a to 45a are referred to as upper surfaces 42a to 45a, respectively.
The first to fourth upper abutting members 42 to 45 are arranged in the X direction, and the third upper abutting member 44, the first upper abutting member 42, and the second upper abutting toward the other side in the X direction. The contact member 43 and the fourth upper contact member 45 are arranged in this order.
The first upper contact member 42 and the second upper contact member 43 are arranged at the same height, and the third upper contact member 44 and the fourth upper contact member 45 are arranged at the same height. Thus, the first upper contact member 42 and the second upper contact member 43 are disposed above the third upper contact member 44 and the fourth upper contact member 45.

The first upper abutting member 42 is formed on a plane that gradually goes downward as the upper surface 42a goes to one side in the X direction. Inclination angle relative to the horizontal plane of the upper surface 42a of the first upper contact member 42 has a theta ₁ (see FIG. 7). The first upper contact member 42 is configured to be able to come into surface contact with the first upper inclined surface 211.
The second upper abutting member 43 is formed on a plane that gradually goes downward as the upper surface 43a goes to the other side in the X direction. Inclination angle relative to the horizontal plane of the upper surface 43a of the second upper contact member 43, has the same theta ₁ and the inclination angle theta ₁ with respect to the horizontal plane of the upper surface 42a of the first upper contact member 42 (see FIG. 7). The second upper contact member 43 is configured to be able to come into surface contact with the second upper inclined surface 212.

The third upper abutting member 44 is formed on a plane that gradually goes downward as the upper surface 44a goes to one side in the X direction. The inclination angle of the upper surface 44a of the third upper contact member 44 with respect to the horizontal plane is θ ₂ that is larger than the inclination angle θ ₁ of the upper surface 42a of the first upper contact member 42 with respect to the horizontal plane (see FIG. 7).
The fourth upper abutting member 45 is formed in a plane that gradually goes downward as the upper surface 45a goes to the other side in the X direction. Inclination angle relative to the horizontal plane of the upper surface 45a of the fourth upper contact member 45 is larger than the inclination angle theta ₁ with respect to the horizontal plane of the upper surface 43a of the second upper contact member 43, the horizontal plane of the upper surface 44a of the third upper contact member 44 Θ ₂ which is the same as the inclination angle with respect to (see FIG. 7). The fourth upper contact member 45 is configured to be able to come into surface contact with the fourth upper inclined surface 214.

As shown in FIGS. 1, 6, and 8, the first to fourth lower contact members 46 to 49 are each formed in a substantially plate shape, and one plate surface 46 a to 49 a faces the lower contact surface 31. The other plate surface side is fixed to the main body 41. This one plate surface 46a-49a is made into the lower surface 46a-49a, respectively.
The first to fourth lower contact members 46 to 49 are arranged in the Y direction, and the third lower contact member 48, the first lower contact member 46, and the second lower contact are arranged toward the other side in the Y direction. The contact member 47 and the fourth lower contact member 49 are arranged in this order.
The first lower contact member 46 and the second lower contact member 47 are disposed at the same height, and the third lower contact member 48 and the fourth lower contact member 49 are disposed at the same height. Thus, the first lower contact member 46 and the second lower contact member 47 are disposed below the third lower contact member 48 and the fourth lower contact member 49.

The first lower abutting member 46 is formed on a plane that gradually goes upward as the lower surface 46a goes to one side in the Y direction. Inclination angle relative to the horizontal plane of the lower surface 46a of the first lower contact member 46 has a theta ₁ (see FIG. 8). The first lower contact member 46 is configured to be able to come into surface contact with the first lower inclined surface 311.
The second lower abutting member 47 is formed on a plane that gradually goes upward as the lower surface 47a goes to the other side in the Y direction. The inclination angle of the lower surface 47a of the second lower contact member 47 with respect to the horizontal plane is the same θ ₁ as the inclination angle θ ₁ of the lower surface 46a of the first lower contact member 46 with respect to the horizontal plane (see FIG. 8). The second lower contact member 47 is configured to be able to come into surface contact with the second lower inclined surface 312.

The third lower abutting member 48 is formed on a plane that gradually goes upward as the lower surface 48a goes to one side in the Y direction. The inclination angle of the lower surface 48a of the third lower contact member 48 with respect to the horizontal plane is θ ₂ which is larger than the inclination angle θ ₁ of the lower surface 46a of the first lower contact member 46 with respect to the horizontal plane (see FIG. 8). The third lower contact member 48 is configured to be able to come into surface contact with the third lower inclined surface 313.
The fourth lower abutting member 49 is formed on a plane that gradually goes upward as the lower surface 49a goes to the other side in the Y direction. Inclination angle relative to the horizontal plane of the lower surface 49a of the fourth lower contact member 49 is larger than the inclination angle theta ₁ with respect to the horizontal plane of the lower surface 47a of the second lower contact member 47, the horizontal plane of the lower surface 48a of the third lower contact member 48 It has the same theta ₂ an inclination angle with respect to (see FIG. 8). The fourth lower contact member 49 is configured to be able to come into surface contact with the fourth lower inclined surface 314.

In the initial state, the seismic isolation mechanism 1A has an upper center portion 21a of the upper guide member 2 and a lower center portion 31a of the lower guide member 3 vertically as shown in FIGS. The movable element 4 is arranged between the upper central portion 21a of the upper guide member 2 and the lower central portion 31a of the lower guide member 3 so as to overlap in the direction.
As shown in FIG. 2, the upper surface 42 a of the first upper contact member 42 is in surface contact with the first upper inclined surface 211, and the upper surface 43 a of the first upper contact member 43 is in contact with the second upper inclined surface 212. In contact. The third upper abutting member 44 is disposed below the first upper inclined surface 211, and the upper surface 44 a is separated from the first upper inclined surface 211. The fourth upper contact member 45 is disposed below the second upper inclined surface 212, and the upper surface 45 a is separated from the second upper inclined surface 212.
As shown in FIG. 1, the first lower contact member 46 has a lower surface 46 a in surface contact with the first lower inclined surface 311, and the second lower contact member 47 has a lower surface 46 a in surface contact with the second lower inclined surface 312. In contact. The third lower abutting member 48 is disposed above the first lower inclined surface 311, and the lower surface 46 a is separated from the first lower inclined surface 311. The fourth lower contact member 49 is disposed on the upper side of the second lower inclined surface 312, and the lower surface 46 a is separated from the second lower inclined surface 312.

  In the initial state, the first upper contact member 42, the second upper contact member 43, the first lower contact member 46, and the second lower contact member 47 each bear the load of the upper structure.

Next, the behavior of the seismic isolation mechanism 1A according to the present embodiment will be described.
As shown in FIGS. 9 to 16, when an earthquake occurs and the upper structure 11 and the lower structure 12 are relatively displaced in the horizontal direction, the upper guide member 2 and the lower guide member 3 are relatively displaced in the horizontal direction. The intersection 5 moves with respect to the upper guide member 2 and the lower guide member 3.
The mover 4 is always arranged at the intersection 5 between the upper guide member 2 and the lower guide member 3. Therefore, when the movable element 4 and the lower guide member 3 are relatively displaced in the Y direction from the initial state shown in FIGS. 1 and 2, as shown in FIGS. The position of the child 4 becomes higher than the initial state, and potential energy (potential energy) is accumulated. Further, as shown in FIGS. 13 to 16 from the initial state, when the mover 4 and the upper guide member 2 are relatively displaced in the X direction, the position of the upper guide member 2 relative to the mover 4 is more than the initial state. The position becomes high and potential energy (potential energy) is accumulated.

  As shown in FIG. 9, the mover 4 moves from the initial state toward one side in the Y direction with respect to the lower guide member 3, the first lower contact member 46 contacts the first lower inclined surface 311, and the third lower portion The first lower contact member 46 contacts the first lower inclined surface 311 until the contact member 48 contacts the third lower inclined surface 313. At this time, since the second lower contact member 47 is separated from the second lower inclined surface 312 and is also separated from the first lower inclined surface 311, among the first to fourth lower contact members 46 to 49, Only the first lower contact member 46 contacts the lower contact surface 31, and the second to fourth lower contact members 47 to 49 are separated from the lower contact surface 31.

As shown in FIG. 10, from the state where the first lower contact member 46 contacts the first lower inclined surface 311 and the third lower contact member 48 contacts the third lower inclined surface 313, the mover 4 is further moved. In a state where the head is directed to one side in the Y direction with respect to the lower guide member 3, the third lower contact member 48 contacts the third lower inclined surface 313. At this time, the first lower contact member 46 is separated from the first lower inclined surface 311 and is also separated from the third lower inclined surface 313, and therefore, among the first to fourth lower contact members 46 to 49, Only the third lower contact member 48 contacts the lower contact surface 31, and the first, second, and fourth lower contact members 46, 47, 49 are separated from the lower contact surface 31.
When the mover 4 comes into contact with the buffer material 34 of the stopper 33 of the lower guide member 3, the movement toward the one side in the Y direction with respect to the lower guide member 3 is restricted.

  As shown in FIG. 11, the mover 4 moves from the initial state toward the other side in the Y direction with respect to the lower guide member 3, and the second lower contact member 47 contacts the second lower inclined surface 312 and the fourth lower portion. The second lower contact member 47 contacts the second lower inclined surface 312 until the contact member 49 contacts the fourth lower inclined surface 314. At this time, the first lower contact member 46 is separated from the first lower inclined surface 311 and is also separated from the second lower inclined surface 312. Only the second lower contact member 47 contacts the lower contact surface 31, and the first, third, and fourth lower contact members 46, 48, and 49 are separated from the lower contact surface 31.

As shown in FIG. 12, the fourth lower abutting member 49 abuts on the fourth lower inclined surface 314 in a state where the movable element 4 further moves toward the other side in the Y direction with respect to the lower guide member 3. At this time, the second lower abutting member 47 is separated from the second lower inclined surface 312 and is also separated from the fourth lower inclined surface 314. Therefore, among the first to fourth lower abutting members 46 to 49, Only the fourth lower contact member 49 contacts the lower contact surface 31, and the first to third lower contact members 46 to 48 are separated from the lower contact surface 31.
When the mover 4 abuts against the buffer material 34 of the stopper 33 of the lower guide member 3, the movement toward the other side in the Y direction with respect to the lower guide member 3 is restricted.

  As shown in FIG. 13, the mover 4 moves from the initial state toward one side in the X direction with respect to the upper guide member 2, and the first upper contact member 42 contacts the first upper inclined surface 211 and the third upper portion. The first upper contact member 42 contacts the first upper inclined surface 211 until the contact member 44 contacts the third upper inclined surface 213. At this time, since the second upper contact member 43 is separated from the second upper inclined surface 212 and also from the first upper inclined surface 211, among the first to fourth upper contact members 42 to 45, Only the first upper contact member 42 contacts the upper contact surface 21, and the second to fourth upper contact members 43 to 45 are separated from the upper contact surface 21.

As shown in FIG. 14, the movable element 4 further moves upward from the state in which the first upper contact member 42 contacts the first upper inclined surface 211 and the third upper contact member 44 contacts the third upper inclined surface 213. In a state toward the one side in the X direction with respect to the guide member 2, the third upper contact member 44 comes into contact with the third upper inclined surface 213. At this time, since the first upper contact member 42 is separated from the first upper inclined surface 211 and also from the third upper inclined surface 213, among the first to fourth upper contact members 42 to 45, Only the third upper contact member 44 contacts the upper contact surface 21, and the first, second and fourth upper contact members 42, 43, 45 are separated from the upper contact surface 21.
When the mover 4 comes into contact with the buffer material 24 of the stopper 23 of the upper guide member 2, the movement toward the one side in the X direction with respect to the upper guide member 2 is restricted.

  As shown in FIG. 15, the mover 4 moves from the initial state toward the other side in the X direction with respect to the upper guide member 2, and the second upper contact member 43 contacts the second upper inclined surface 212 and the fourth upper portion. The second upper contact member 43 contacts the second upper inclined surface 212 until the contact member 45 contacts the fourth upper inclined surface 214. At this time, the first upper abutting member 42 is separated from the first upper inclined surface 211 and also from the second upper inclined surface 212, and therefore, among the first to fourth upper abutting members 42 to 45, Only the second upper contact member 43 contacts the upper contact surface 21, and the first, third, and fourth upper contact members 42, 44, 45 are separated from the upper contact surface 21.

As shown in FIG. 16, the movable element 4 further moves from the state in which the second upper contact member 43 contacts the second upper inclined surface 212 and the fourth upper contact member 45 contacts the fourth upper inclined surface 214. In the state toward the other side in the X direction with respect to the upper guide member 2, the fourth upper contact member 45 contacts the fourth upper inclined surface 214. At this time, since the second upper contact member 43 is separated from the second upper inclined surface 212 and also from the fourth upper inclined surface 214, among the first to fourth upper contact members 42 to 45, Only the fourth upper contact member 45 contacts the upper contact surface 21, and the first to third upper contact members 42 to 44 are separated from the upper contact surface 21.
When the mover 4 comes into contact with the buffer material 24 of the stopper 23 of the upper guide member 2, the movement toward the other side in the X direction with respect to the upper guide member 2 is restricted.

As shown in FIG. 17A, if the axial force (self-weight) supported by the seismic isolation mechanism 1A is W, the restoring force (horizontal force) F ₁ due to the inclination of the first upper inclined surface 211 shown in FIG. is represented by the formula (1), the restoring force due to the inclination of the third upper slanted surface 213 shown in FIG. 17 (c) (horizontal force) _{F 2} are represented by the formula (2). In FIG. 17, as compared with the inclination angle θ1 of the first upper slanted surface 211 of the upper guide member 2, for easy understanding of the difference between the inclination angle theta ₂ of the third upper slanted surface 213, and other figures X The direction dimension is reduced.

Here, since θ ₂ > θ ₁ , F2> F1.
When the friction coefficient of the first upper abutting member 42 is μ ₁ = 0.1, the restoring force F ₁ acting on the upper guide member 2 is expressed by Expression (3).

This is the same as the case where a constant load spring having a pre-tension force F is installed between the upper structure 11 and the lower structure 12, and is constant regardless of the relative displacement amount of the upper structure 11 and the lower structure 12. The restoring force F acts. If tan θ ₁ ≧ μ ₁ , the residual displacement can be completely removed, but it is described in Japanese Patent Application Laid-Open No. 2011-201873 that the residual displacement can be removed even with a value corresponding to 1/2 to 1/10. Has been. Thus, in this embodiment, it turns out that there exists the same effect, without installing a constant load spring.
When the friction coefficient of the second upper contact member 43 is μ ₂ , (μ ₂ + tan θ ₂ )> (μ ₁ + tan θ ₁ ).

The restoring force (horizontal force) due to the inclination of the second upper inclined surface 212, the first lower inclined surface 311 and the second lower inclined surface 312 is represented by F ₁ in the above equations (1) and (3), The restoring force (horizontal force) due to the inclination of the upper inclined surface 214, the third lower inclined surface 313, and the fourth lower inclined surface 314 is also expressed by F ₂ in the above equation (2).

FIG. 18 shows the restoring force characteristics (load-deformation relationship) of the seismic isolation mechanism 1A according to this embodiment.
Restoring force characteristics (μ ₁ W ₁ , μ ₂ W ₂ ) due to frictional resistance when the first to fourth upper abutting members 42 to 45 and the first to fourth lower abutting members 46 to 49 slide, and restoration due to inclination A combination of the force characteristics (F ₁ = Wtan θ ₁ , F ₂ = Wtan θ ₂ ) and the restoring force characteristics of the stoppers 23 and 33 is the restoring force characteristic of the seismic isolation mechanism 1A according to this embodiment.
In Figure 18 L1 shows the inclination angle theta ₁ ranging from the upper abutment surface 21 and a lower abutment surface 31, L2 is the inclination angle of theta ₂ range of the upper abutment surface 21 and a lower abutment surface 31 Show.

Next, the operation and effect of the seismic isolation mechanism 1A according to the first embodiment will be described with reference to the drawings.
In the seismic isolation mechanism 1A according to the first embodiment described above, the gradient of the third upper inclined surface 213 with respect to the horizontal plane is configured to be greater than the gradient of the first upper inclined surface 211 with respect to the horizontal plane. Accordingly, when the mover 4 and the upper guide member 2 are relatively displaced so that the mover 4 is directed to one side in the X direction with respect to the upper guide member 2 from the initial state, the mover 4 is tilted to the first upper inclination. Compared to the relative displacement toward the one side in the X direction along the surface 211, the relative displacement of the mover 4 toward the one direction in the X direction along the third upper inclined surface 213 is decelerated by the inclination angle. The movable portion can be prevented from moving to one side in the X direction from the third upper inclined surface 213, and the mover 4 can be prevented from coming off the upper guide member 2.
Similarly, the gradient of the fourth upper inclined surface 214 with respect to the horizontal plane is configured to be larger than the gradient of the second upper inclined surface 212 with respect to the horizontal plane, so that the movable element 4 is more than the fourth upper inclined surface 214. The movement to the other side in the X direction can be suppressed, and the mover 4 can be prevented from being detached from the upper guide member 2.

Further, the gradient of the third lower inclined surface 313 with respect to the horizontal plane is configured to be larger than the gradient of the first lower inclined surface 311 with respect to the horizontal plane. Accordingly, when the mover 4 and the upper guide member 2 are relatively displaced so that the mover 4 is directed to one side in the Y direction with respect to the upper guide member 2 from the initial state, the mover 4 is inclined to the first lower inclination. Since the relative displacement of the mover 4 in one direction in the X direction along the third lower inclined surface 313 is decelerated by the inclination angle, compared to the relative displacement in the Y direction along the surface 311. The movable portion can be prevented from moving to one side in the Y direction with respect to the third upper inclined surface 213, and the movable element 4 can be prevented from being detached from the lower guide member 3.
Similarly, since the gradient of the fourth lower inclined surface 314 with respect to the horizontal plane is configured to be larger than the gradient of the second lower inclined surface 312 with respect to the horizontal plane, the mover 4 is more than the fourth lower inclined surface 314. The movement to the other side in the Y direction can be suppressed, and the mover 4 can be prevented from coming off the lower guide member 3.

Moreover, since it is not necessary to lengthen the upper guide member 2 and the lower guide member 3 in the direction in which the upper guide member 2 and the lower guide member 3 are displaced relative to the mover 4, the seismic isolation mechanism 1A can be downsized.
In addition, the first to fourth upper abutting members 42 to 45 and the first to fourth lower abutting members 46 to 49 are configured by sliding members that can slide on the inclined surfaces, respectively. Compared to the case where these first to fourth upper abutting members 42 to 45 and the first to fourth lower abutting members 46 to 49 are constituted by rolling members capable of rolling on an inclined surface. The load capacity per seismic isolation mechanism can be increased.

(Second Embodiment)
Next, other embodiments will be described with reference to the accompanying drawings, but the same or similar members and parts as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. A different configuration will be described.
As shown in FIG. 19, the seismic isolation mechanism 1B according to the second embodiment includes a third upper contact member 44B, a fourth upper contact member 45B, a third lower contact member 48B, and a fourth lower portion of the mover 4B. The contact member 49B is composed of three rollers (rolling members) 7, 7, and 7 having substantially the same shape, instead of the sliding member as in the first embodiment. The upper guide member and the lower guide member are configured similarly to the upper guide member 2 and the lower guide member 3 (see FIGS. 1 and 2) of the first embodiment.

The three rollers 7, 7, 7 of the third upper abutting member 44 </ b> B are disposed between the pair of upper projecting plate portions 412, 412 with their axes extending in the Y direction, and the pair of upper projecting plate portions 412, 1212. 412 is supported so as to be rotatable about an axis. The three rollers 7, 7, and 7 are arranged along a planar first upper virtual inclined surface 75a that gradually becomes lower as it goes to one side in the X direction. The first upper virtual inclined surface 75a is continuous with the surface 76a including the upper surface 42a of the first upper contact member 42, and the inclination angle with respect to the horizontal plane is the upper surface 44a of the third upper contact member 44 of the first embodiment. Is set to the same θ ₂ as the angle of inclination with respect to the horizontal plane. For this reason, when the movable element 4B is disposed on the lower side of the third upper inclined surface 213 (see FIG. 14), the three rollers 7, 7, and 7 are in contact with the third upper inclined surface 213, respectively. It is configured to be able to roll along the upper inclined surface 213.

The three rollers 7, 7, 7 of the fourth upper abutting member 45 </ b> B are disposed between the pair of upper protruding plate portions 412, 412 with their axes extending in the Y direction. 412 is supported so as to be rotatable about an axis. The three rollers 7, 7, 7 are arranged along a planar second upper virtual inclined surface 75 b that gradually becomes lower as it goes to the other side in the X direction. The second upper virtual inclined surface 75b is continuous with the surface 76b including the upper surface 43a of the second upper contact member 43, and the inclination angle with respect to the horizontal plane is the upper surface 45a of the fourth upper contact member 45 of the first embodiment. Is set to the same θ ₂ as the angle of inclination with respect to the horizontal plane. For this reason, when the movable element 4B is disposed below the fourth upper inclined surface 214 (see FIG. 16), the three rollers 7, 7, and 7 are in contact with the fourth upper inclined surface 214, respectively. It is configured to roll along the upper inclined surface 214.

The three rollers 7, 7, and 7 of the third lower abutting member 48B are disposed between the pair of lower projecting plate portions 413 and 413 in such a manner that the axis extends in the X direction, and the pair of lower projecting plate portions 413 and 413, respectively. 413 is supported so as to be rotatable around the axis. The three rollers 7, 7, 7 are arranged along a planar first lower virtual inclined surface 75 c that gradually becomes upper as it goes to one side in the Y direction. The first lower virtual inclined surface 75c is continuous with the surface 76c including the lower surface 46a of the first lower contact member 46, and the inclination angle with respect to the horizontal plane is the lower surface 48a of the third lower contact member 48 of the first embodiment. Is set to the same θ ₂ as the angle of inclination with respect to the horizontal plane. For this reason, the three rollers 7, 7, 7 contact the third lower inclined surface 313, respectively, when the movable element 4 </ b> B is disposed on the upper side of the third lower inclined surface 313 (see FIG. 10). It is configured to roll along the inclined surface 313.

The three rollers 7, 7, 7 of the fourth lower abutting member 49 </ b> B are disposed between the pair of lower protruding plate portions 413, 413 with the axes extending in the X direction, and the pair of lower protruding plate portions 413, 413. 413 is supported so as to be rotatable around the axis. The three rollers 7, 7, 7 are arranged along a planar second lower virtual inclined surface 75 d that gradually becomes upper as it goes to the other side in the X direction. The second lower virtual inclined surface 75d is continuous with the surface 76d including the lower surface 47a of the second lower contact member 47, and the inclination angle with respect to the horizontal plane is the lower surface 49a of the fourth lower contact member 49 of the first embodiment. Is set to the same θ ₂ as the angle of inclination with respect to the horizontal plane. For this reason, when the movable element 4B is disposed on the upper side of the fourth lower inclined surface 314 (see FIG. 12), the three rollers 7, 7, and 7 are in contact with the fourth lower inclined surface 314, respectively. It is configured to roll along the inclined surface 314.

  As shown in FIG. 20, these rollers 7, 7... Each include a pipe body 71 such as a pipe disposed on the outer periphery, a shaft part 72 inserted into the pipe body 71, a shaft part 72 and a pipe. And an attenuation material 73 filled between the inner peripheral surface of the body 71. As the damping material 73, a viscoelastic body or the like is employed.

In the seismic isolation mechanism 1B according to the second embodiment, the third upper abutting member 44B of the mover 4B is composed of the rollers 7, 7, and 7 so that the upper guiding member 2 is on one side in the X direction. When the moving movable element 4 passes through the boundary between the first upper inclined surface 211 and the second upper inclined surface 212 and comes into contact with the first upper inclined surface 211, or when the first movable inclined surface 211 and the third upper inclined surface 213 When the roller 7, 7, 7 of the third upper contact member 44 </ b> B rolls when passing through the boundary and contacting the third upper inclined surface 213, the impact of the contact can be absorbed.
Further, since the fourth upper abutting member 45B of the mover 4B is composed of the rollers 7, 7, 7, the mover 4 toward the other side in the X direction with respect to the upper guide member 2 is inclined to the first upper portion. When passing through the boundary between the surface 211 and the second upper inclined surface 212 and coming into contact with the second upper inclined surface 212, or passing through the boundary between the second upper inclined surface 212 and the fourth upper inclined surface 214, the fourth upper inclined surface. When the roller 7, 7, 7 of the fourth contact member rolls when it comes into contact with 214, the impact of the contact can be absorbed.
By these things, the needle | mover 4 and the upper guide member 2 can be displaced relatively smoothly.

Further, since the third lower abutting member 48B of the mover 4B is configured by the rollers 7, 7, 7, the mover 4 directed to one side in the Y direction with respect to the lower guide member 3 is inclined to the first lower portion. When passing through the boundary between the surface 311 and the second lower inclined surface 312 and contacting the first lower inclined surface 311, or passing through the boundary between the first lower inclined surface 311 and the third lower inclined surface 313, the third lower inclined surface When the roller 3, 7, 7 of the third lower abutting member 48 </ b> B rolls when contacting the 313, the impact of the contact can be absorbed.
Further, since the fourth lower abutting member 49 of the mover 4 is composed of the rollers 7, 7, 7, the mover 4 toward the other side in the Y direction with respect to the lower guide member 3 is inclined to the first lower portion. When passing through the boundary between the surface 311 and the second lower inclined surface 312 and contacting the second lower inclined surface 312, or passing through the boundary between the second lower inclined surface 312 and the fourth lower inclined surface 314, the fourth lower inclined surface When the roller 7, 7, 7 of the fourth lower contact member 49 </ b> B rolls when contacting the 314, it is possible to absorb the impact of the contact.
By these things, the needle | mover 4 and the lower guide member 3 can be displaced relatively smoothly.

In addition, the rollers 7, 7, 7 have the damping material 73 that attenuates the impact with the upper contact surface 21 and the lower contact surface 31, respectively. , 7 can absorb the impact when contacting the upper contact surface 21 or the lower contact surface 31, so that the movable element 4 and the upper guide member 2 and the lower guide member 3 are smoothly displaced relative to each other. Can do.
The third and fourth upper abutting members 44 and 45 and the third and fourth lower abutting members rollers 7, 7 and 7 are like the first upper abutting member 42 and the second upper abutting member 43. Since the coefficient of friction is smaller than that of a sliding member, the movable element 4 can easily return to the initial position even with its own weight.

(Third embodiment)
As shown in FIGS. 21 and 22, in the seismic isolation mechanism 1C according to the third embodiment, the first upper inclined surface 211C and the third upper inclined surface 213C of the upper guide member 2C are not continuous in the X direction, First upper inclined surfaces 211C and 211C are formed on both sides of the third upper inclined surface 213C in the Y direction, respectively. The inclination angle of the first upper inclined surfaces 211C and 211C with respect to the horizontal plane is θ ₁ as in the above embodiment, and the inclination angle of the third upper inclined surface 213C with respect to the horizontal plane is θ as in the above embodiment. ₂
The two first upper inclined surfaces 211C and 211C are arranged at positions overlapping each other when viewed from the Y direction. A portion on one side in the X direction of the two first upper inclined surfaces 211C and 211C and a portion on the other side in the X direction on the third upper inclined surface 213C are arranged at positions overlapping each other when viewed from the Y direction. A portion overlapping the two first upper inclined surfaces 211C and 211C and the third upper inclined surface 213C when viewed from the Y direction is defined as a first upper overlapping range 215.

The second upper inclined surface 212C and the fourth upper inclined surface 214C of the upper guide member 2C are not continuous in the X direction, and the second upper inclined surfaces 212C and 212C are respectively provided on both sides of the fourth upper inclined surface 214C in the Y direction. Is formed. The inclination angle of the second upper inclined surfaces 211C and 211C with respect to the horizontal plane is θ ₁ as in the above embodiment, and the inclination angle of the fourth upper inclined surface 214C with respect to the horizontal plane is θ as in the above embodiment. ₂
The two second upper inclined surfaces 212C and 212C are arranged at positions overlapping each other when viewed from the Y direction. The other X-direction portion of the two second upper inclined surfaces 212C and 212C and the one X-direction portion of the fourth upper inclined surface 214C are arranged at positions overlapping each other when viewed from the Y direction. A portion where the two second upper inclined surfaces 212C and 212C overlap with the fourth upper inclined surface 214C when viewed from the Y direction is defined as a second upper overlapping range 216.

The first lower inclined surface 311C and the third lower inclined surface 313C of the lower guide member 3C are not continuous in the X direction, and the first lower inclined surfaces 311C and 311C are respectively provided on both sides of the third lower inclined surface 313C in the X direction. Is formed. The inclination angle of the first lower inclined surfaces 311C and 311C with respect to the horizontal plane is θ ₁ as in the above embodiment, and the inclination angle of the third lower inclined surface 313C with respect to the horizontal plane is θ as in the above embodiment. ₂
The two first lower inclined surfaces 311C and 311C are arranged at positions overlapping each other when viewed from the X direction. A portion on one side in the Y direction of the two first lower inclined surfaces 311C and 311C and a portion on the other side in the Y direction on the third lower inclined surface 313C are arranged at positions overlapping each other when viewed from the X direction. A portion overlapping the two first lower inclined surfaces 311C and 311C and the third lower inclined surface 313C when viewed from the X direction is defined as a first lower overlapping range 315.

The second lower inclined surface 312C and the fourth lower inclined surface 314C of the lower guide member 3C are not continuous in the X direction, and the second lower inclined surfaces 312C and 312C are respectively provided on both sides of the fourth lower inclined surface 314C in the X direction. Is formed. The inclination angle of the second lower inclined surfaces 312C and 312C with respect to the horizontal plane is θ ₁ as in the above embodiment, and the inclination angle of the fourth lower inclined surface 314C with respect to the horizontal plane is θ as in the above embodiment. ₂
The two second lower inclined surfaces 312C and 312C are arranged at positions overlapping each other when viewed from the X direction. The other portion in the Y direction of the two second lower inclined surfaces 312C and 312C and the one portion in the Y direction of the fourth lower inclined surface 314C are disposed so as to overlap each other when viewed from the X direction. A portion overlapping the two second lower inclined surfaces 312C, 312C and the fourth lower inclined surface 314C when viewed from the X direction is defined as a second lower overlapping range 316.

Further, as shown in FIGS. 21 and 23, in the third embodiment, the first upper contact member 42C and the third upper contact member 44C of the mover 4C are not arranged in the X direction. First upper contact members 42C and 42C are provided on both sides in the Y direction of the upper contact member 44C, respectively. The inclination angle of the upper surface 42a of the first upper abutting members 42C and 42C with respect to the horizontal plane is θ ₁ as in the above embodiment. The inclination angle of the upper surface 44a of the third upper contact member 44 with respect to the horizontal plane is θ ₂ as in the above embodiment.
The two first upper abutting members 42C and 42C are configured to be in surface contact with the first upper inclined surfaces 211C and 211C, respectively. The third upper contact member 44C is configured to be able to come into surface contact with the third upper inclined surface 213C.

The second upper abutting member 43C and the fourth upper abutting member 45C of the mover 4C are not arranged in the X direction, and the second upper abutting members are respectively provided on both sides of the fourth upper abutting member 45C in the Y direction. 43C and 43C are provided. The inclination angle of the upper surface 43a of the second upper abutting members 43C and 43C with respect to the horizontal plane is θ ₁ as in the above embodiment. The inclination angle of the upper surface 45a of the fourth upper contact member 45 with respect to the horizontal plane is θ ₂ as in the above embodiment.
The two second upper abutting members 43C and 43C are configured to be in surface contact with the second upper inclined surfaces 212C and 212C, respectively. The fourth upper contact member 45C is configured to be able to come into surface contact with the fourth upper inclined surface 214C.

The first lower abutting member 46C and the third lower abutting member 48C of the mover 4C are not arranged in the Y direction, and the first lower abutting members are respectively provided on both sides of the third lower abutting member 48C in the Y direction. 46C and 46C are provided. The inclination angle of the lower surface 46a of the first lower abutting members 46C and 46C with respect to the horizontal plane is θ ₁ as in the above embodiment. The inclination angle of the lower surface 48a of the third lower contact member 48 with respect to the horizontal plane is θ ₂ as in the above embodiment.
The two first lower abutting members 46C and 46C are configured to be in surface contact with the first lower inclined surfaces 311C and 311C, respectively. The third lower contact member 48C is configured to be able to come into surface contact with the third lower inclined surface 313C.

The second lower abutting member 47C and the fourth lower abutting member 49C of the mover 4C are not arranged in the Y direction, and the second lower abutting members are respectively provided on both sides of the fourth lower abutting member 49C in the Y direction. 47C and 47C are provided. The inclination angle of the lower surface 47a of the second lower contact members 47C and 47C with respect to the horizontal plane is θ ₁ as in the above embodiment. The inclination angle of the lower surface 49a of the fourth lower contact member 49 with respect to the horizontal plane is θ ₂ as in the above embodiment.
The two second lower contact members 47C and 47C are configured to be in surface contact with the second lower inclined surfaces 312C and 312C, respectively. The fourth lower contact member 49C is configured to be able to come into surface contact with the fourth lower inclined surface 314C.

In the initial state, as shown in FIG. 21, the seismic isolation mechanism 1C has an upper center portion 21a of the upper guide member 2C and a lower center portion 31a of the lower guide member 3C that overlap in the vertical direction. The mover 4C is disposed between the upper center portion 21a of the upper guide member 2C and the lower center portion 31a of the lower guide member 3C.
The upper surface 42a of the first upper contact member 42C is in surface contact with the first upper inclined surface 211C, and the upper surface 43a of the second upper contact member 43C is in surface contact with the second upper inclined surface 212C. The third upper contact member 44C is separated from the first upper inclined surface 211C without overlapping in the vertical direction. The fourth upper contact member 45C is spaced apart from the second upper inclined surface 212C without overlapping in the vertical direction.

  The lower surface 46a of the first lower contact member 46C is in surface contact with the first lower inclined surface 311C, and the lower surface 47a of the second lower contact member 47C is in surface contact with the second lower inclined surface 312C. The third lower contact member 48C is separated from the first lower inclined surface 311C without overlapping in the vertical direction. The fourth lower contact member 49C is spaced apart from the second lower inclined surface 312C without overlapping in the vertical direction.

  As shown in FIG. 24, the first lower abutting member 46 </ b> C is the first lower abutting member 46 </ b> C from the initial state toward the one side in the Y direction with respect to the lower guide member 3 </ b> C and up to the first lower overlapping range 315. It contacts the lower inclined surface 311C. At this time, since the second lower contact member 47C is separated from the second lower inclined surface 312C and also from the first lower inclined surface 311C, among the first to fourth lower contact members 46C to 49C, Only the first lower contact member 46 </ b> C contacts the lower contact surface 31, and the second to fourth lower contact members 47 to 49 </ b> C are separated from the lower contact surface 31. FIG. 24 also shows a state in which the mover 4C is disposed above the first lower inclined surface 311C and a state where the mover 4C is disposed above the second lower inclined surface 312C.

  As shown in FIG. 25, when the movable element 4C further moves toward one side in the Y direction with respect to the lower guide member 3C and reaches the first lower overlapping range 315, the first lower contact member 46C is moved to the first lower inclined surface. The third lower contact member 48C contacts the third lower inclined surface 313C. At this time, of the first to fourth lower contact members 46C to 49C, the first and third lower contact members 48C contact the lower contact surface 31, and the second and fourth lower contact members 49C are the lower portions. It will be in the state spaced apart from the contact surface 31. FIG. 25 also shows a state in which the mover 4C is disposed above the first lower overlapping area 315, the third lower inclined surface 313C, the second lower overlapping area 316, and the fourth lower inclined surface 314C, The display of the structure 11 is omitted.

  In a state in which the movable element 4C is further directed to one side in the Y direction with respect to the lower guide member 3C from the first lower overlapping range 315, the third lower contact member 48C contacts the third lower inclined surface 313C. At this time, since the first lower contact member 46C is separated from the first lower inclined surface 311C, only the third lower contact member 48C among the first to fourth lower contact members 46C to 49C is the lower contact. The first, second and fourth lower contact members 49C are in contact with the surface 31, and are separated from the lower contact surface 31.

  Returning to FIG. 24, the second lower abutting member 47 </ b> C is inclined from the initial state toward the other side in the Y direction with respect to the lower guide member 3 </ b> C up to the second lower overlapping range 316. Abuts with surface 312C. At this time, since the first lower contact member 46C is separated from the first lower inclined surface 311C and also from the second lower inclined surface 312C, among the first to fourth lower contact members 46C to 49C, Only the second lower contact member 47 </ b> C contacts the lower contact surface 31, and the first, third, and fourth lower contact members 46 </ b> C, 48 </ b> C, and 49 </ b> C are separated from the lower contact surface 31.

  As shown in FIG. 25, when the movable element 4C further moves toward the other side in the Y direction with respect to the lower guide member 3C and reaches the second lower overlapping range 316, the second lower contact member 47C is moved to the second lower inclined surface. The fourth lower contact member 49C contacts the 312C, and the fourth lower contact member 49C contacts the fourth lower inclined surface 314C. At this time, among the first to fourth lower contact members 46C to 49C, the second and fourth lower contact members 49C contact the lower contact surface 31, and the first and third lower contact members 46C and 48C. Is separated from the lower contact surface 31.

  In a state where the movable element 4C further moves from the second lower overlapping range 316 toward the other side in the Y direction with respect to the lower guide member 3C, the fourth lower contact member 49C contacts the fourth lower inclined surface 314C. At this time, since the second lower contact member 47C is separated from the second lower inclined surface 312C, only the fourth lower contact member 49C among the first to fourth lower contact members 46C to 49C is the lower contact. The second, third, and fourth lower contact members 46C, 47C, 49C are in contact with the surface 31, and are separated from the lower contact surface 31.

  As shown in FIG. 26, the first upper abutting member 42 </ b> C first upper portion extends from the initial state toward the first upper overlapping range 215 toward the one side in the X direction with respect to the upper guide member 2 </ b> C from the initial state. It abuts on the inclined surface 211C. At this time, the second upper contact member 43C is separated from the second upper inclined surface 212C and is also separated from the first upper inclined surface 211C, and therefore, among the first to fourth upper contact members 42C to 45C, Only the first upper contact member 42 </ b> C contacts the upper contact surface 21, and the second to fourth upper contact members 43 </ b> C to 45 </ b> C are separated from the upper contact surface 21. FIG. 26 also shows a state in which the mover 4C is disposed below the first upper inclined surface 211C and a state disposed above the second upper inclined surface 212C.

  As shown in FIG. 27, when the movable element 4C further moves toward one side in the X direction with respect to the upper guide member 2C and reaches the first upper overlapping range 215, the first upper contact member 42C is moved to the first upper inclined surface. The third upper contact member 44C contacts the second upper inclined surface 213C. At this time, of the first to fourth upper contact members 42C to 45C, the first and third upper contact members 44C contact the lower contact surface 31, and the second and fourth lower contact members 47C and 49C. Is separated from the lower contact surface 31. FIG. 27 also shows a state in which the mover 4C is disposed below the first upper overlapping range 215, the third upper inclined surface 213C, the second upper overlapping range 216, and the fourth upper inclined surface 214C. The display of the lower structure 12 is omitted.

  In a state where the movable element 4C is further directed to one side in the X direction with respect to the upper guide member 2C from the first upper overlapping range 215, the third upper contact member 44C contacts the third upper inclined surface 213C. At this time, since the first upper contact member 42C is separated from the first upper inclined surface 211C, only the third upper contact member 44C among the first to fourth upper contact members 42C to 45C is the upper contact. The first, second, and fourth upper contact members 42C, 43C, and 45C are in contact with the surface 21, and are separated from the upper contact surface 21.

  Returning to FIG. 26, the second upper abutting member 43 </ b> C is inclined from the initial state toward the other side in the X direction with respect to the upper guide member 2 </ b> C until the second upper overlapping range 216. Abuts with surface 212C. At this time, since the first upper contact member 42C is separated from the first upper inclined surface 211C and also from the second upper inclined surface 212C, among the first to fourth upper contact members 42C to 45C, Only the second upper contact member 43C contacts the upper contact surface 21, and the first, third, and fourth upper contact members 42C, 44C, and 45C are separated from the upper contact surface 21.

  As shown in FIG. 27, when the movable element 4C further moves toward the other side in the X direction with respect to the upper guide member 2C and reaches the second upper overlapping range 216, the second upper contact member 43C is moved to the second upper inclined surface. The fourth upper contact member 45C contacts the fourth upper inclined surface 214C. At this time, among the first to fourth upper contact members 42C to 45C, the second and fourth upper contact members 45C contact the upper contact surface 21, and the first and third upper contact members 42C and 44C. Is separated from the upper contact surface 21.

  In a state where the movable element 4C further moves from the second upper overlapping range 216 toward the other side in the X direction with respect to the upper guide member 2C, the fourth upper contact member 45C contacts the fourth upper inclined surface 214C. At this time, since the second upper contact member 43C and the second upper inclined surface 212C are separated from each other, only the fourth upper contact member 45C among the first to fourth upper contact members 42C to 45C is the upper contact surface. 21, the first to third upper contact members 42 </ b> C to 44 </ b> C are separated from the upper contact surface 21.

According to the seismic isolation mechanism 1C according to the third embodiment, the same effects as those of the first embodiment can be obtained.
Further, the movable element 4C moves in the first upper overlapping range 215 toward one side in the X direction, so that the relative displacement between the movable element 4C and the upper guide member 2C can be reduced, and the movable element 4C By moving the second upper overlapping range 216 toward the other side in the X direction, the relative displacement between the mover 4C and the upper guide member 2C can be decelerated. Thereby, since the mover 4C does not move greatly in the X direction, the length of the upper guide member 2C in the X direction can be suppressed.

  In addition, the movable element 4C moves in the first lower overlapping range 315 toward one side in the Y direction, so that the relative displacement between the movable element 4C and the lower guide member 3C can be reduced, and the movable element 4C By moving the second lower overlapping range 316 toward the other side in the Y direction, the relative displacement between the mover 4C and the lower guide member 3C can be decelerated. Thereby, since the mover 4C does not move greatly in the Y direction, the length of the upper guide member 2C in the Y direction can be suppressed.

The first upper overlapping range 215, the second upper overlapping range 216, the first lower overlapping range 315 and the second lower overlapping range 316, the restoring force _{F 3} is expressed by the following formula (4).

  For this reason, it is possible to decelerate at a desired position by adjusting the dimensions of the first upper overlapping range 215, the second upper overlapping range 216, the first lower overlapping range 315, and the second lower overlapping range 316.

As mentioned above, although embodiment of the seismic isolation mechanism by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the first embodiment, the first to fourth upper contact members 42 to 45 are configured to be slidable on the upper contact surface, but may be configured to be able to roll. The first to fourth lower contact members 46 to 49 are configured to be slidable on the lower contact surface, but may be configured to be able to roll.
In the second embodiment, the third upper abutting member 44, the fourth upper abutting member 45, the third lower abutting member 48, and the fourth lower abutting member 49 have three rollers 7, However, the number of rollers 7 may be set as appropriate.
Moreover, in said 2nd Embodiment, although the 1st-4th upper contact member 42-45 and the 1st-4th lower contact member 46-49 are comprised by the roller 7, it replaces with the roller 7. You may be comprised with the bearing.
In the above embodiment, the roller 7 includes the damping material 73, but may not include the damping material 73.

  In the above embodiment, the third upper inclined surface 213 is formed on one side in the X direction of the first upper inclined surface 211, and the fourth upper inclined surface 214 is formed on the other side in the X direction of the second upper inclined surface 212. The third lower inclined surface 313 is formed on one side of the first lower inclined surface 311 in the Y direction, and the fourth lower inclined surface 314 is formed on the other side of the second lower inclined surface 312 in the Y direction. Yes. On the other hand, an inclined surface having a larger gradient is formed on one side in the X direction of the third upper inclined surface 213, and an inclined surface having a larger gradient is formed on the other side in the X direction of the fourth upper inclined surface 214, An inclined surface with a larger gradient is formed on one side in the Y direction of the third lower inclined surface 313, and an inclined surface with a larger gradient is formed on the other side in the Y direction of the fourth lower inclined surface 314. These inclined surfaces The movable element 4C may be moved and decelerated.

  In the third embodiment, the first upper inclined surface 211C is disposed on each side of the third upper inclined surface 213C in the Y direction, and the second upper inclined surface 212C is disposed in the Y direction of the fourth upper inclined surface 214C. The first lower inclined surface 311C is disposed on each side in the X direction of the third lower inclined surface 313C, and the second lower inclined surface 312C is disposed on each side in the X direction of the fourth lower inclined surface 314C. Has been. In contrast, the third upper inclined surface 213C is disposed on each side in the Y direction of the first upper inclined surface 211C, and the fourth upper inclined surface 214C is disposed on each side in the Y direction of the second upper inclined surface 212C. The third lower inclined surface 313C may be disposed on each side in the X direction of the first lower inclined surface 311C, and the fourth lower inclined surface 314C may be disposed on each side in the X direction of the second lower inclined surface 312C.

1A to 1C Seismic isolation mechanism 2, 2C Upper guide member 3, 3C Lower guide member 4, 4B, 4C Movable element 5 Intersection 7 Roller (rolling member)
DESCRIPTION OF SYMBOLS 11 Upper structure 12 Lower structure 13 Seismic isolation layer 21 Upper contact surface 21a Upper center part 23 Stopper 31 Lower contact surface 31a Lower side center part 33 Stopper 42, 42C 1st upper contact member 43, 43C 2nd upper part Contact member 44, 44B, 44C Third upper contact member 45, 45B, 45C Fourth upper contact member 46, 46C First lower contact member 47, 47C Second lower contact member 48, 48B, 48C Third Lower contact member 49, 49B, 49C Fourth lower contact member 73 Damping material 211, 211C First upper inclined surface 212, 212C Second upper inclined surface 213, 213C Third upper inclined surface 214, 214C Fourth upper inclined surface 215 First upper overlapping range 216 Second upper overlapping range 311, 311C First lower inclined surface 312, 312C Second lower inclined surface 313, 313C First Lower inclined surface 314,314C fourth lower slanted surface 315 first lower overlapping range 316 second lower overlapping range

Claims (5)

In the seismic isolation mechanism provided between the upper structure and the lower structure that can be relatively displaced in the horizontal direction,
An upper guide member fixed to the bottom of the upper structure;
A lower guide member fixed to an upper portion of the lower structure;
Another horizontal member that is interposed between the upper guide member and the lower guide member and is relatively displaceable in one horizontal direction with the upper guide member and that is orthogonal to the lower guide member and the one horizontal direction. A mover capable of relative displacement in the direction,
The upper guide member has an upper contact surface with which the mover contacts,
The upper abutting surface includes a first upper inclined surface disposed on one side of the one horizontal direction from an upper central portion serving as the one horizontal central portion, and the one horizontal direction from the upper central portion. A second upper inclined surface disposed on the other side of the first upper inclined surface, a third upper inclined surface disposed on one side in the one horizontal direction with respect to the first upper inclined surface, and the second upper inclined surface with respect to the second upper inclined surface. A fourth upper inclined surface disposed on the other horizontal side of one,
The first upper inclined surface is formed on a flat surface that gradually goes downward from the upper central portion toward the one horizontal side.
The second upper inclined surface is formed in a plane gradually going downward as it goes from the upper central portion to the other side in the one horizontal direction,
The third upper inclined surface is formed on a plane gradually going downward with a larger gradient than the first upper inclined surface toward one side in the one horizontal direction,
The fourth upper inclined surface is formed in a plane gradually going downward with a larger gradient than the second upper inclined surface toward the other side in the one horizontal direction,
The lower guide member has a lower contact surface with which the mover contacts,
The lower abutting surface includes a first lower inclined surface disposed on one side of the other horizontal direction from a lower central portion which is the other horizontal central portion, and the other lower central portion from the lower central portion. From a second lower inclined surface arranged on the other side in the horizontal direction, a third lower inclined surface arranged on the one other side in the other horizontal direction than the first lower inclined surface, and the second lower inclined surface And a fourth lower inclined surface disposed on the other horizontal side of the other,
The first lower inclined surface is formed on a plane that gradually goes upward as it goes from the lower central portion to one side in the other horizontal direction,
The second lower inclined surface is formed on a plane gradually going upward as it goes from the lower central part to the other side in the other horizontal direction,
The third lower inclined surface is formed in a plane gradually going upward with a larger gradient than the first lower inclined surface as it goes to one side of the other horizontal direction,
The fourth lower inclined surface is formed on a plane gradually going upward with a larger gradient than the second lower inclined surface as it goes to the other side in the other horizontal direction,
The mover includes a main body part,
A first upper abutting member fixed to the main body and capable of abutting on the first upper inclined surface;
A second upper abutting member fixed to the main body and capable of abutting against the second upper inclined surface;
A third upper abutting member fixed to the main body and capable of abutting on the third upper inclined surface;
A fourth upper abutting member fixed to the main body and capable of abutting on the fourth upper inclined surface;
A first lower contact member fixed to the main body and capable of contacting the first lower inclined surface;
A second lower contact member fixed to the main body and capable of contacting the second lower inclined surface;
A third lower contact member fixed to the main body and capable of contacting the third lower inclined surface;
A fourth lower abutting member fixed to the main body part and capable of abutting on the fourth lower inclined surface;
In an initial state, the mover is disposed below the upper central portion, the first upper abutting member abuts on the first upper inclined surface, and the second upper abutting member is on the second upper portion. The third upper contact member and the fourth upper contact member are spaced apart from the upper contact surface, and the movable element is disposed above the lower central portion. 1 lower contact member is in contact with the first lower inclined surface, the second lower contact member is in contact with the second lower inclined surface, and the third lower contact member and the fourth lower contact member are Spaced apart from the lower abutment surface;
The first upper abutting member is in contact with the first upper inclined surface while being displaced relative to the upper guide member from the initial state so as to be directed to one side of the one horizontal direction with respect to the upper guide member. Until the third upper abutting member abuts on the third upper inclined surface, the first upper abutting member abuts on the first upper inclined surface, the second upper abutting member, 3 upper contact members and the fourth upper contact member are separated from the upper contact surface,
The second upper contact member is displaced relative to the upper guide member from the initial state so as to be directed to the other side of the one horizontal direction with respect to the upper guide member, and the second upper contact member is in contact with the second upper inclined surface. Until the fourth upper contact member contacts the fourth upper inclined surface, the second upper contact member contacts the second upper inclined surface, and the first upper contact member, 3 upper contact members and the fourth upper contact member are separated from the upper contact surface,
From the state where the first upper abutting member abuts on the first upper inclined surface and the third upper abutting member abuts on the third upper inclined surface, the one horizontal surface with respect to the upper guide member is provided. When the upper guide member is displaced relative to the one side in the direction, the third upper contact member comes into contact with the third upper inclined surface, and the first upper contact member and the second upper contact member And the fourth upper contact member is separated from the upper contact surface,
From the state in which the second upper abutting member abuts on the second upper inclined surface and the fourth upper abutting member abuts on the fourth upper inclined surface, the one horizontal surface with respect to the upper guide member is provided. When the relative displacement with the upper guide member is directed toward the other side of the direction, the fourth upper contact member contacts the fourth upper inclined surface, and the first upper contact member and the second upper contact member And the third upper contact member is separated from the upper contact surface,
The first lower abutting member comes into contact with the first lower inclined surface while being relatively displaced from the initial state relative to the lower guide member so as to be directed to one side in the other horizontal direction with respect to the lower guide member. Until the third lower abutting member abuts on the third lower inclined surface, the first lower abutting member abuts on the first lower inclined surface, the second lower abutting member, 3 lower contact members and the fourth lower contact member are separated from the lower contact surface,
From the initial state, the second guide member is displaced relative to the lower guide member toward the other side in the other horizontal direction with respect to the lower guide member, and the second lower contact member comes into contact with the second lower inclined surface. Until the fourth lower abutting member abuts on the fourth lower inclined surface, the second lower abutting member abuts on the second lower inclined surface, and the first lower abutting member, 3 lower contact members and the fourth lower contact member are separated from the lower contact surface,
From the state in which the first lower abutting member abuts on the first lower inclined surface and the third lower abutting member abuts on the third lower inclined surface, the other horizontal member with respect to the lower guide member When the relative displacement with the lower guide member is directed to one side of the direction, the third lower contact member contacts the third lower inclined surface, and the first lower contact member and the second lower contact member And the fourth lower contact member is separated from the lower contact surface,
From the state in which the second lower abutting member abuts on the second lower inclined surface and the fourth lower abutting member abuts on the fourth lower inclined surface, the second horizontal abutting member is in contact with the other lower horizontal guide member. When the relative displacement with respect to the lower guide member is directed toward the other side of the direction, the fourth lower contact member contacts the fourth lower inclined surface, and the first lower contact member and the second lower contact member And the third lower contact member is separated from the lower contact surface. The first upper abutting member, the second upper abutting member, the third upper abutting member, and the fourth upper abutting member are constituted by sliding members that can slide on the upper abutting surface,
The first lower abutment member, the second lower abutment member, the third lower abutment member, and the fourth lower abutment member are constituted by sliding members that can slide on the lower abutment surface. The seismic isolation mechanism according to claim 1. The first upper abutment member and the second upper abutment member are constituted by sliding members that can slide on the upper abutment surface,
The third upper abutting member and the fourth upper abutting member are constituted by rolling members capable of rolling on the upper abutting surface,
The first lower abutting member and the second lower abutting member are constituted by sliding members that can slide on the lower abutting surface,
2. The seismic isolation mechanism according to claim 1, wherein the third lower contact member and the fourth lower contact member are configured by a rolling member capable of rolling on the lower contact surface.   The third upper abutting member, the fourth upper abutting member, the third lower abutting member, and the rolling members constituting the fourth lower abutting member are each contact impacts with the rolling surfaces. The seismic isolation mechanism according to claim 3, further comprising a damping material that attenuates the vibration. The first upper inclined surface and the third upper inclined surface are disposed at a position shifted in the other horizontal direction, and the one horizontal portion of the first upper inclined surface, A portion of the third upper inclined surface on the other side in the one horizontal direction overlaps when viewed from the other horizontal direction, and the mover is below the first upper overlap range. When the first upper contact member is in contact with the first upper inclined surface, the third upper contact member is in contact with the third upper inclined surface, and the second upper contact member is in contact with the third upper inclined surface. A contact member and the fourth upper contact member are separated from the upper contact surface;
The second upper inclined surface and the fourth upper inclined surface are disposed at positions shifted in the other horizontal direction, and the second horizontal inclined portion of the second upper inclined surface, A portion of the fourth upper inclined surface on one side in the one horizontal direction has a second upper overlapping range that overlaps when viewed from the other horizontal direction, and the mover is below the second upper overlapping range. When the second upper contact member is in contact with the second upper inclined surface, the fourth upper contact member is in contact with the fourth upper inclined surface, and the first upper contact member is in contact with the fourth upper inclined surface. A member and the third upper contact member are separated from the upper contact surface;
The first lower inclined surface and the third lower inclined surface are disposed at positions shifted in the one horizontal direction, and the other one horizontal portion of the first lower inclined surface, A first lower overlapping range that overlaps the other horizontal portion of the third lower inclined surface when viewed from the one horizontal direction, and the mover is located above the first lower overlapping range. In the positioned state, the first lower contact member contacts the first lower inclined surface, the third lower contact member contacts the third lower inclined surface, and the second lower contact member. And the fourth lower contact member is separated from the lower contact surface,
The second lower inclined surface and the fourth lower inclined surface are disposed at a position shifted in the one horizontal direction, and the other horizontal portion of the second lower inclined surface, A portion of the fourth lower inclined surface on one side in the other horizontal direction overlaps when viewed from the one horizontal direction, and the mover is located above the second lower overlap range. In the positioned state, the second lower contact member contacts the second lower inclined surface, and the fourth lower contact member contacts the fourth lower inclined surface, and the first lower contact member 5. The seismic isolation mechanism according to claim 1, wherein the third lower contact member is separated from the lower contact surface.

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