JP6748930B2 - Seismic isolation mechanism - Google Patents

Description

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

Conventionally, seismic isolation mechanisms for preventing (suppressing) earthquake damage to buildings and precision equipment have been known. For example, in Patent Document 1, a mover serving as a slider is provided between an upper guide member fixed to a bottom portion of an upper structure to be seismically isolated and a lower guide member fixed to an upper portion of a lower structure. There is disclosed a seismic isolation mechanism which is interposed. In this seismic isolation mechanism, the sliding surface between the mover and the upper guide member is formed into an inclined V-shaped inclined surface along one horizontal direction, and the sliding surface between the mover and the lower guide member is formed. It is formed in a V-shaped inclined surface along the other horizontal direction orthogonal to the one horizontal direction.
By moving the mover along the inclined surface, it is possible to reduce acceleration when an earthquake occurs, reduce vibration, and recover displacement.

JP, 2013-130216, A

However, when the response displacement due to the earthquake exceeds the expected value, the mover may move largely with respect to the upper guide member and the lower guide member, and the mover may be disengaged from the upper guide member and the lower guide member. Further, the mover may be disengaged from the upper guide member and the lower guide member by an external force from one direction such as wind 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 in which they are displaced relative to the mover, but there is a problem that the seismic isolation mechanism becomes large and the installation space increases.

Therefore, an object of the present invention is to provide a seismic isolation mechanism that can prevent the mover from coming off from the upper guide member and the lower guide member and can be downsized.

In order to achieve the above object, the seismic isolation mechanism according to the present invention is a seismic isolation mechanism provided between an upper structure and a lower structure that can be relatively displaced in the horizontal direction, and is fixed to the bottom of the upper structure. Is disposed between the upper guide member, the lower guide member fixed to the upper portion of the lower structure, the upper guide member and the lower guide member, and is displaced relative to the upper guide member in a horizontal direction. The upper guide member has a lower guide member and a movable element that is relatively displaceable in the other horizontal direction orthogonal to the one horizontal direction, and the upper guide member has an upper contact with which the movable element abuts. A first upper inclined surface disposed on one side in the one horizontal direction from an upper center portion which is the central portion in the horizontal direction, and an upper contact portion. A second upper sloping surface arranged on the other side in the one horizontal direction, a third upper sloping surface arranged on one side in the one horizontal direction with respect to the first upper sloping surface, and the second upper section A fourth upper sloping surface disposed on the other side of the one horizontal direction with respect to the sloping surface, the first upper sloping surface extending from the upper central portion to the one horizontal side of the one horizontal direction. According to the second upper inclined surface, the second upper sloping surface is formed in a plane gradually declining toward the other horizontal side from the upper central portion, and the third upper sloping surface is formed. The surface is formed in a plane that gradually goes downward with a larger gradient than the first upper inclined surface toward one side in the one horizontal direction, and the fourth upper inclined surface is the other in the one horizontal direction. The lower guide member has a lower contact surface with which the mover abuts, and the lower guide member is formed on a flat surface that gradually goes downward with a greater gradient than the second upper inclined surface. Is a first lower sloping surface disposed on one side of the other horizontal direction from a lower center portion that is the other horizontal center portion, and the other horizontal direction of the other from the lower center portion. A second lower sloping surface, a third lower sloping surface disposed on one side of the first lower sloping surface in the horizontal direction other than the first lower sloping surface, and a horizontal direction other than the second lower sloping surface. A fourth lower sloping surface disposed on the other side in the direction, and the first lower sloping surface is a plane that gradually increases toward the upper side from the lower central portion toward the other horizontal direction. The second lower sloping surface is formed in a plane that gradually increases toward the other side in the other horizontal direction from the lower central portion, and the third lower sloping surface is in the other horizontal direction. One side Is formed in a plane that gradually increases toward the upper side with a gradient larger than that of the first lower inclined surface, and the fourth lower inclined surface is closer to the other side in the other horizontal direction than the second lower inclined surface. The movable element is formed on a plane that gradually increases upward with a large gradient, and the mover includes a main body portion, a first upper contact member that is fixed to the main body portion and is capable of contacting the first upper inclined surface, and the main body. A second upper abutment member fixed to the portion and abutting against the second upper inclined surface; and a third upper abutment member fixed to the main body portion and abuttable against the third upper inclined surface; A fourth upper abutment member fixed to the body portion and abutting against the fourth upper inclined surface, and a first lower abutment member fixed to the body portion and abuttable against the first lower inclined surface. A second lower contact member that is fixed to the main body portion and can contact the second lower inclined surface, and a third lower contact member that is fixed to the main body portion and can contact the third lower inclined surface. A contact member and a fourth lower contact member that is fixed to the main body and can contact the fourth lower inclined surface. In the initial state, the mover is located below the upper central portion. And the first upper abutment member abuts the first upper sloped surface, the second upper abutment member abuts the second upper sloped surface, the third upper abutment member and the third upper abutment member. 4 The upper contact member is separated from the upper contact surface, the mover is arranged above the lower central portion, and the first lower contact member contacts 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 fourth lower contact member are separated from the lower contact surface, and the third lower contact member and the fourth lower contact member are separated from the initial state. The upper guide member is relatively displaced with respect to the upper guide member toward the one side in the horizontal direction, the first upper contact member contacts the first upper inclined surface, and the third upper contact member. Until the contact member contacts the third upper inclined surface, the first upper contact member contacts the first upper inclined surface, and the second upper contact member and the third upper contact member. , And the fourth upper abutment member is separated from the upper abutment surface, and is relatively displaced with respect to the upper guide member from the initial state toward the other side in the one horizontal direction. The second upper contact member is in contact with the second upper inclined surface while the second upper contact member is in contact with the second upper inclined surface and the fourth upper contact member is in contact with the fourth upper inclined surface. The first upper contact member, the third upper contact member, and the fourth upper member that contact the second upper inclined surface. The partial contact member is separated from the upper contact surface, the first upper contact member contacts the first upper inclined surface, and the third upper contact member 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 is performed relative to the upper guide member, the third upper contact member contacts 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 contacts the second upper inclined surface. Along with the fourth upper contact member contacting the fourth upper inclined surface, relative displacement with the upper guide member toward the other side of the one horizontal direction with respect to the upper guide member, The fourth upper abutment member abuts the fourth upper inclined surface, and the first upper abutment member, the second upper abutment member, and the third upper abutment member are separated from the upper abutment surface. Then, relative to the lower guide member, the first lower contact member is displaced relative to the lower guide member toward one side in the other horizontal direction, and the first lower contact member contacts the first lower inclined surface. The first lower contact member contacts the first lower inclined surface until the third lower contact member contacts the third lower inclined surface, and the second lower contact member, The third lower abutment member and the fourth lower abutment member are separated from the lower abutment surface so that the third lower abutment member faces the other horizontal direction of the lower guide member from the initial state. Until the second lower abutment member abuts the second lower inclined surface and the fourth lower abutment member abuts the fourth lower inclined surface, the first lower guide member is displaced relative to the lower guide member. A second lower contact member contacts the second lower inclined surface, and the first lower contact member, the third lower contact member, and the fourth lower contact member separate from the lower contact surface; From the state in which the first lower contact member contacts the first lower inclined surface and the third lower contact member contacts the third lower inclined surface, the other horizontal position with respect to the lower guide member. When the relative displacement with the lower guide member is made toward 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 abutment member is separated from the lower abutment surface, the second lower abutment member abuts the second lower inclined surface, and the fourth lower abutment member is the fourth lower inclined surface. From the state of contacting the surface to the lower guide member On the other hand, when the lower guide member is relatively displaced toward the other side in the other horizontal direction, the fourth lower contact member contacts the fourth lower inclined surface, and the first lower contact member, A position where the second lower contact member and the third lower contact member are separated from the lower contact surface, and the first upper inclined surface and the third upper inclined surface are displaced in the other horizontal direction. And a portion of the first upper sloping surface on one side in the horizontal direction and a portion of the third upper sloping surface on the other side in the horizontal direction are in the other horizontal direction. When the movable element is located below the first upper overlapping area, the first upper abutting member contacts the first upper inclined surface. The third upper contact member abuts on the third upper inclined surface, and the second upper contact member and the fourth upper contact member are separated from the upper contact surface, The surface and the fourth upper sloped surface are arranged at positions different from each other in the other horizontal direction, and the second horizontal side of the second upper sloped surface and the fourth upper sloped surface. A portion on one side of the one horizontal direction of the surface has a second upper overlapping range that overlaps when viewed from the other horizontal direction, and the mover is located below the second upper overlapping range. In the state in which 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 and the first upper contact member 3. The upper contact member is separated from the upper contact surface, and the first lower inclined surface and the third lower inclined surface are arranged at positions shifted in the one horizontal direction, and A first lower overlapping range in which the portion of the inclined surface on one side in the other horizontal direction and the portion of the third lower inclined surface on the other side in the other horizontal direction overlap with each other when viewed from the one horizontal direction. And in a state in which the mover is located above the first lower overlapping range, the first lower contact member contacts the first lower inclined surface, and the third lower contact member operates. The second lower contact member and the fourth lower contact member are separated from the lower contact surface, and the second lower inclined surface and the fourth lower inclined surface are: The second lower sloping surface is disposed at a position displaced in the one horizontal direction, and the other horizontal side portion of the second lower sloping surface and the other horizontal one side of the fourth lower sloping surface. And a second lower overlapping area in which the portion overlaps when viewed from the one horizontal direction, In a state in which the second lower contact member is located above the second lower overlapping range, the second lower contact member contacts the second lower inclined surface, and the fourth lower contact member contacts the fourth lower inclined surface, The first lower contact member and the third lower contact member are separated from the lower contact surface.

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

As for the relative displacement between the mover and the lower guide member, similarly to the relative displacement between the mover and the upper guide member, the gradient of the third lower inclined surface is larger than the gradient of the first lower inclined surface, so that the movable element is movable. When the mover and the lower guide member are relatively displaced so that the child is directed to the other horizontal direction side with respect to the lower guide member, the mover that has moved along the first lower inclined surface is moved to the third lower part. By moving along the inclined surface, the relative displacement between the mover and the lower guide member is reduced, so that the mover can be prevented from coming off to the other horizontal side of the lower guide member. Since the slope of the fourth lower inclined surface is larger than the slope of the second lower inclined surface, the mover and the lower guide member face each other so that the mover faces the other side in the other horizontal direction with respect to the lower guide member. When displaced, the mover that has moved along the second lower inclined surface moves along the fourth lower inclined surface, and the relative displacement between the mover and the lower guide member is decelerated. Can be prevented from coming off to the other horizontal side of the lower guide member.
Further, 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 downsized.

Further, in the present invention, the first upper sloped surface and the third upper sloped surface are arranged at positions that are offset from each other in the other horizontal direction, and the first upper sloped surface and one horizontal side portion of the first upper sloped surface. , A portion of the third upper inclined surface on the other side in the horizontal direction has a first upper overlapping range when viewed from the other horizontal direction, and the mover is located below the first upper overlapping range. The first upper contact member contacts the first upper inclined surface, the third upper contact member contacts the third upper inclined surface, and the second upper contact member and the fourth upper contact member are in contact with each other. Is separated from the upper abutment surface, the second upper inclined surface and the fourth upper inclined surface are arranged at positions displaced from each other in the other horizontal direction, and at the other side of the second upper inclined surface in the other horizontal direction. The portion and the portion on one side in the horizontal direction of the fourth upper inclined surface have a second upper overlapping range overlapping with each other when viewed from the other horizontal direction, and the mover is located below the second upper overlapping range. In the positioned state, the second upper abutting member abuts the second upper inclined surface, the fourth upper abutting member abuts the fourth upper inclined surface, and the first upper abutting member and the third upper abutting member contact. The contact member is separated from the upper contact surface, and the first lower inclined surface and the third lower inclined surface are arranged at positions shifted in one horizontal direction, and one of the first lower inclined surfaces in the other horizontal direction. Has a first lower overlapping range in which the side portion and the other side portion of the third lower inclined surface in the other horizontal direction overlap each other when viewed from one horizontal direction, and the mover is located above the first lower overlapping range. In the state in which the first lower contact member is in contact with the first lower inclined surface, the third lower contact member is in contact with the third lower inclined surface, and the second lower contact member and the fourth lower member are in contact with each other. The contact member is separated from the lower contact surface, the second lower inclined surface and the fourth lower inclined surface are arranged at positions horizontally offset from each other, and the second lower inclined surface is moved in the other horizontal direction. There is a second lower overlapping range in which the other side portion and the other one side portion of the fourth lower inclined surface in the horizontal direction overlap with each other when viewed from one horizontal direction, and the mover has the second lower overlapping range. In the state of being located on the upper side, the second lower contact member contacts the second lower inclined surface, the fourth lower contact member contacts the fourth lower inclined surface, and the first lower contact member and the third lower contact member The lower contact member is separated from the lower contact surface.
With such a configuration, the relative displacement between the mover and the upper guide member is adjusted 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 reduced 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.

In the seismic isolation mechanism according to the present invention, the first upper contact member, the second upper contact member, the third upper contact member, and the fourth upper contact member have the upper contact surface. The first lower abutment member, the second lower abutment member, the third lower abutment member, and the fourth lower abutment member are slidable sliding members. It may be composed of a slidable sliding member.

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 composed of a member, and it is possible to increase the withstand load per one of the first lower contact member, the second lower contact member, the third lower contact member, and the fourth lower contact member.

Further, in the seismic isolation mechanism according to the present invention, the first upper abutment member and the second upper abutment member are slidable members capable of sliding on the upper abutment surface, and the third upper abutment member. The contact member and the fourth upper contact member are rolling members capable of rolling on the upper contact surface, and the first lower contact member and the second lower contact member are the lower contact members. The third lower abutment member and the fourth lower abutment member may be formed of a sliding member capable of sliding on a surface, and may be a rolling member capable of rolling on the lower abutment surface. ..

With this configuration, 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 contact 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 contact member, the relative displacement between the mover and the upper guide member can be smoothly performed. 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 contact member comes into contact with the fourth upper inclined surface, the impact of this contact is applied to the fourth upper inclined surface. Since the contact member can be absorbed by rolling, the mover and the upper guide member can be smoothly displaced relative to each other.
As for the relative displacement between the mover and the lower guide member, similarly to the relative displacement between the mover and the upper 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. When the third lower contact 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 contact member. Relative displacement can be performed smoothly. When the mover moves from above the second lower sloping surface to above the fourth lower sloping surface and the fourth lower abutment member contacts the fourth lower sloping surface, the impact of this contact is applied to the fourth lower abutment. 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.

According to the present invention, the mover can be prevented from coming off the upper guide member and the lower guide member, and the seismic isolation mechanism can be downsized.

It is a 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 schematic diagram which shows an example which looked at the seismic isolation mechanism by 1st Embodiment of this invention from the Y direction. It is an exploded perspective view showing an example of the seismic isolation mechanism by a 1st embodiment of the present invention. FIG. 3 is a plan view of the seismic isolation mechanism according to the first embodiment of the present invention. It is the perspective view which looked at a mover from the upper part. It is the perspective view which looked at a mover from the lower side. It is the sectional view on the AA line of FIG. It is a B direction arrow view of FIG. It is a figure explaining a mode that a mover is located above the 1st lower slope. It is a figure explaining a mode that a mover is located above the 3rd lower slope. It is a figure explaining a mode that a mover is located above the 2nd lower slope. It is a figure explaining a mode that a mover is located above the 4th lower slope. It is a figure explaining a mode that a mover is located above the 1st upper slope. It is a figure explaining a mode that a mover is located above the 3rd upper slope. It is a figure explaining a mode that a mover is located above the 2nd upper slope. It is a figure explaining a mode that a mover is located above the 4th upper part slope. (A) is a figure explaining a seismic isolation mechanism in an initial state and its own weight, (b) is a figure explaining a seismic isolation mechanism and a restoring force when the mover is located below the first upper inclined surface, (c) [Fig. 6] is a diagram illustrating a seismic isolation mechanism and a restoring force when the mover is located below the third upper inclined surface. It is a figure explaining a restoring force characteristic (load-deformation relation). (A) is a perspective view of the mover of the seismic isolation mechanism according to the second embodiment of the present invention seen from above, (b) is a sectional view taken along the line CC of (a), and (c) is D of (a). It is a -D line sectional view. 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 X direction, (b) is an example which looked at the seismic isolation mechanism by 1st Embodiment of this invention seen from Y direction. It is a schematic diagram which shows. (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 a perspective view of the mover seen from above, and (b) is a perspective view of the mover seen from below. It is a figure explaining a mode that a mover is located above the 1st lower slope and the 2nd lower slope. It is a figure explaining a mode that a mover is located above the 1st lower part overlap range, the 3rd lower part slope, the 2nd lower part overlap range, and the 4th lower part slope. It is a figure explaining a mode that a mover is located below a 1st upper slope and a 2nd upper slope. It is a figure explaining a mode that a mover is located below the 1st upper part overlap, the 3rd upper slope, the 2nd upper overlap, and the 4th upper slope.

(First embodiment)
Hereinafter, a seismic isolation mechanism according to an embodiment of the present invention will be described with reference to FIGS. 1 to 18.
As shown in FIGS. 1 and 2, the seismic isolation mechanism 1A according to the first embodiment is provided in a seismic isolation layer 13 between an upper structure 11 and a 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 portion of the upper structure 11, a lower guide member 3 arranged below the upper guide member 2 and fixed to an upper portion of the lower structure 12, and an upper guide member. The movable element 4 is 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 composed of a long block-shaped member, and is arranged so that the longitudinal direction thereof 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 plate-shaped fixing plate portion 22. In addition, in FIG. 3, the fixing plate portion 22 is omitted.
As shown in FIGS. 2 and 3, the lower surface of the upper guide member 2 is formed so that the substantially central portion in the X direction is convex upward along the X direction. The lower surface of the upper guide member 2 is the upper contact surface 21, and the substantially central portion of the upper contact surface 21 in the X direction is the upper central portion 21a.
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 of the inclined surface 211 on one side in the X direction to one side in the X direction, and another 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 that extends.

The first upper sloping surface 211 is formed in a plane that gradually goes downward from the upper central portion 21a toward 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 sloping surface 212 is formed in 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 θ ₁ which is the same 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 sloping surface 213 is formed in a flat surface that gradually decreases toward the 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 which 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 sloping 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 are θ ₂ >θ ₁ .
A sliding member such as Teflon (registered trademark) is provided on each of the first to fourth upper inclined surfaces 214.

The upper guide member 2 is formed with a pair of stoppers 23, 23 projecting downward from the upper contact surface 21 at both end portions in the X direction, and the pair of stoppers 23, 23 are provided on opposite surfaces thereof. Cushioning materials 24, 24 are provided to absorb the impact when the mover 4 collides with the stoppers 23, 23. The stoppers 23, 23 and the cushioning materials 24, 24 are arranged on the orbit of the mover 4 when the upper guide member 2 and the mover 4 are relatively displaced.
For the cushioning members 24, 24, for example, an elastic body, a viscous body, a viscoelastic body, or the like is used, and 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 composed of a long block-shaped member that is substantially the same as the upper guide member 2, and has a longitudinal direction orthogonal to the X direction in a plan view in another horizontal direction (Y Direction and) is arranged in 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 plate-shaped fixing plate portion 32. The fixing plate portion 32 is omitted in FIG.
As shown in FIGS. 1 and 3, the upper surface of the lower guide member 3 is formed such that the substantially central portion in the Y direction is convex downward along the Y direction. The upper surface of the lower guide member 3 is the lower contact surface 31, and the substantially central portion of the lower contact surface 31 in the Y direction is the 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, and (1) a third lower sloped surface 313 extending from one end in the Y direction of the lower sloped surface 311 to one side in the Y direction, and the other end in the Y direction from the other end in the Y direction of the second lower sloped surface 312 And a fourth lower inclined surface 314 extending to the side.

The first lower sloping surface 311 is formed in a plane that gradually goes up from the lower central portion 31a toward 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 sloping surface 312 is formed in a plane that gradually extends upward from the lower central portion 31a toward 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 as the inclination angle of the first lower inclined surface 311 with respect to the horizontal plane, θ ₁ . The first lower inclined surface 311 and the second lower inclined surface 312 are continuous at the lower central portion 31a.

The third lower sloping surface 313 is formed in a plane that gradually increases toward the 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 which is larger than the inclination angle θ _{1 of} the first lower inclined surface 311 with respect to the horizontal plane. The first lower sloping surface 311 and the third lower sloping surface 313 are continuous so as to form a predetermined angle.
The fourth lower sloping surface 314 is formed in a plane that gradually increases toward 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 are θ ₂ >θ ₁ .
A sliding member such as Teflon (registered trademark) is provided on each of the first to fourth lower inclined surfaces 314.

The lower guide member 3 is formed with a pair of stoppers 33, 33 projecting upward from the lower contact surface 31 at both ends in the Y direction, and the pair of stoppers 33, 33 are movable on opposite surfaces. Cushioning materials 34, 34 are provided to absorb the impact when the child 4 collides with the stoppers 33, 33. The stoppers 33, 33 and the cushioning members 34, 34 are arranged on the orbit of the mover 4 when the lower guide member 3 and the mover 4 are relatively displaced.
For the cushioning materials 34, 34, for example, an elastic body, a viscous body, a viscoelastic body, or the like is used, 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 with each other with a gap in which the mover 4 is arranged in the vertical direction. As shown in FIG. 4, the mover 4 is arranged at an intersection 5 of the upper guide member 2 and the lower guide member 3 where the upper guide member 2 and the lower guide member 3 overlap each other 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 abutting members 42 to 45 provided on an upper portion of the main body portion 41, and a main body. The first to fourth lower abutment members 46 to 49 provided on the lower portion of the portion 41.
The first to fourth upper abutment members 42 to 45 are sliding members that can slide along the upper abutment surface 21, and the first to fourth lower abutment members 46 to 49 are lower abutment surfaces. The sliding member is slidable along 31.

The main body portion 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) protruding upward from the base 411, and protruding downward from the base 411. And a pair of lower projecting plate portions 413 and 413 (see FIGS. 2 and 3).
The base portion 411 is arranged such that the upper surface and the lower surface face the vertical direction, the pair of side surfaces facing each other face the X direction, and the other pair of facing side surfaces respectively face the Y direction.

The pair of upper projecting plate portions 412 and 412 project upward from both end portions of the base portion 411 in the Y direction, and each plate surface is formed in a flat plate shape facing the Y direction. The first to fourth upper abutting members 42 to 45 are arranged between the pair of upper projecting plate portions 412 and 412.
Sliding members 414 and 414 (see FIGS. 1 and 5) such as Teflon (registered trademark) are provided in the vicinity of the upper ends of the pair of upper projecting plate portions 412 and 412 in the surfaces facing each other.
The vicinity of the upper end of each of the pair of upper projecting plate portions 412 and 412 projects above the first to fourth upper abutting members 42 to 45, and the mover 4 is arranged below the upper guide member 2. , The upper guide member 2 is arranged laterally of the upper guide member 2 so as to be sandwiched from both sides in the Y direction, and the sliding members 414 and 414 provided on the upper guide member 2 are configured to contact the side surfaces of the upper guide member 2. There is.

The pair of lower projecting plate portions 413, 413 are projected 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. The first to fourth lower abutting members 46 to 49 are arranged between the pair of lower projecting plate portions 413 and 413.
Sliding members 415 and 415 (see FIG. 2 and FIG. 6) such as Teflon (registered trademark) are provided near the lower ends of the pair of lower projecting plate portions 413 and 413 in the surfaces facing each other.
The vicinity of the lower end of each of the pair of lower projecting plate portions 413 and 413 projects below the first to fourth lower contact members 46 to 49, and the mover 4 is disposed above the lower guide member 3. The lower guide members 3 are arranged laterally of the lower guide member 3 so as to sandwich the lower guide members 3 from both sides in the X direction, and the sliding members 415 and 415 provided on the lower guide members 3 are configured to contact the side surfaces of the lower guide member 3. There is.

As shown in FIGS. 2, 3, 5 and 7, each of the first to fourth upper abutment members 42 to 45 is formed in a substantially plate shape, and one plate surface 42 a to 45 a is the upper abutment surface 21. The other plate surface side is fixed to the main body portion 41. The one plate surfaces 42a to 45a are referred to as upper surfaces 42a to 45a, respectively.
The first to fourth upper abutment members 42 to 45 are arranged in the X direction, and the third upper abutment member 44, the first upper abutment member 42, and the second upper abutment member are arranged 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 arranged above the third upper contact member 44 and the fourth upper contact member 45.

The first upper abutting member 42 is formed in a plane in which the upper surface 42a gradually decreases toward one side in the X direction. The inclination angle of the upper surface 42a of the first upper contact member 42 with respect to the horizontal plane is θ ₁ (see FIG. 7). The first upper contact member 42 is configured to be in surface contact with the first upper inclined surface 211.
The second upper contact member 43 is formed in a plane in which the upper surface 43a gradually decreases toward 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 in surface contact with the second upper inclined surface 212.

The third upper contact member 44 is formed in a plane in which the upper surface 44a gradually decreases toward 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 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 abutment member 45 is formed in a plane in which the upper surface 45a gradually decreases toward the other side in the X direction. The inclination angle of the upper surface 45a of the fourth upper abutting member 45 with respect to the horizontal plane is larger than the inclination angle θ ₁ of the upper surface 43a of the second upper abutting member 43 with respect to the horizontal plane, and the horizontal surface of the upper surface 44a of the third upper abutting member 44. It has the same theta ₂ an inclination angle with respect to (see FIG. 7). The fourth upper contact member 45 is configured to be in surface contact with the fourth upper inclined surface 214.

As shown in FIGS. 1, 6 and 8, each of the first to fourth lower abutment members 46 to 49 is formed in a substantially plate shape, and one plate surface 46 a to 49 a faces the lower abutment surface 31. The other plate surface side is fixed to the main body 41. The one plate surfaces 46a to 49a are referred to as lower surfaces 46a to 49a, respectively.
The first to fourth lower abutment members 46 to 49 are arranged in the Y direction, and the third lower abutment member 48, the first lower abutment member 46, and the second lower abutment member 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.
Further, the first lower contact member 46 and the second lower contact member 47 are arranged at the same height, and the third lower contact member 48 and the fourth lower contact member 49 are arranged at the same height. Thus, the first lower contact member 46 and the second lower contact member 47 are arranged below the third lower contact member 48 and the fourth lower contact member 49.

The first lower contact member 46 is formed in a plane in which the lower surface 46a gradually increases toward the one side in the Y direction. The inclination angle of the lower surface 46a of the first lower contact member 46 with respect to the horizontal plane is θ ₁ (see FIG. 8). The first lower contact member 46 is configured to be in surface contact with the first lower inclined surface 311.
The second lower contact member 47 is formed in a plane in which the lower surface 47a gradually increases toward the other side in the Y direction. Inclination angle relative to the horizontal plane of the lower surface 47a of the second lower contact member 47 is made same as theta ₁ and the inclination angle theta ₁ with respect to the horizontal plane of the lower surface 46a of the first lower contact member 46 (see FIG. 8). The second lower contact member 47 is configured to be in surface contact with the second lower inclined surface 312.

The third lower contact member 48 is formed in a plane in which the lower surface 48a gradually increases toward the 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 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 in surface contact with the third lower inclined surface 313.
The fourth lower contact member 49 is formed in a plane in which the lower surface 49a gradually increases toward the other side in the Y direction. The inclination angle of the lower surface 49a of the fourth lower contact member 49 with respect to the horizontal plane is greater than the inclination angle θ ₁ of the lower surface 47a of the second lower contact member 47 with respect to the horizontal plane, and the lower surface 48a of the third lower contact member 48 has a horizontal surface. 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 in surface contact with the fourth lower inclined surface 314.

In the seismic isolation mechanism 1A, in the initial state, as shown in FIGS. 1, 2 and 4, the upper center portion 21a of the upper guide member 2 and the lower center portion 31a of the lower guide member 3 move vertically. The mover 4 is arranged between the upper center portion 21a of the upper guide member 2 and the lower center portion 31a of the lower guide member 3 so as to overlap each other in the direction.
As shown in FIG. 2, the upper surface 42a of the first upper contact member 42 is in surface contact with the first upper inclined surface 211, and the upper surface 43a of the second upper contact member 43 is in contact with the second upper inclined surface 212. Are in contact. The third upper contact member 44 is disposed below the first upper inclined surface 211, and the upper surface 44a is separated from the first upper inclined surface 211. Further, the fourth upper contact member 45 is arranged below the second upper inclined surface 212, and the upper surface 45a is separated from the second upper inclined surface 212.
As shown in FIG. 1, the lower surface 46a of the first lower contact member 46 is in surface contact with the first lower inclined surface 311, and the lower surface 46a of the second lower contact member 47 is in contact with the second lower inclined surface 312. Are in contact. The third lower contact member 48 is disposed above the first lower inclined surface 311, and the lower surface 46a is separated from the first lower inclined surface 311. The fourth lower contact member 49 is arranged above the second lower inclined surface 312, and the lower surface 46a 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 bear the load of the upper structure 11, respectively.

Next, the behavior of the seismic isolation mechanism 1A according to this 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 of the upper guide member 2 and the lower guide member 3. Therefore, when the mover 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. 9 to 12, the movable member 4 and the lower guide member 3 move relative to the lower guide member 3. The position of the child 4 becomes higher than that in the initial state, and potential energy (potential energy) is accumulated. When the movable element 4 and the upper guide member 2 are relatively displaced in the X direction from the initial state as shown in FIGS. 13 to 16, the position of the upper guide member 2 with respect to the movable element 4 is more than that in the initial state. It becomes a high position and potential energy (potential energy) is accumulated.

As shown in FIG. 9, the mover 4 moves from the initial state to one side in the Y direction with respect to the lower guide member 3, and the first lower contact member 46 contacts the first lower inclined surface 311 and the third lower part. 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, the second lower contact member 47 is separated from the second lower inclined surface 312 and also separated from the first lower inclined surface 311. Therefore, 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. The third lower contact member 48 contacts the third lower inclined surface 313 in a state where the first lower contact member 48 faces one side in the Y direction with respect to the lower guide member 3. At this time, since the first lower contact member 46 is separated from the first lower inclined surface 311 and also separated from the third lower inclined surface 313, 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 contacts the cushioning material 34 of the stopper 33 of the lower guide member 3, the mover 4 is restrained from moving further toward the one side in the Y direction with respect to the lower guide member 3.

As shown in FIG. 11, the mover 4 moves from the initial state to 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 part. 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. Therefore, among the first to fourth lower contact members 46 to 49, Only the second lower contact member 47 contacts the lower contact surface 31, and the first, third, and fourth lower contact members 46, 48, 49 are separated from the lower contact surface 31.

As shown in FIG. 12, when the mover 4 further faces the other side in the Y direction with respect to the lower guide member 3, the fourth lower contact member 49 contacts the fourth lower inclined surface 314. At this time, since the second lower contact member 47 is separated from the second lower inclined surface 312 and also separated from the fourth lower inclined surface 314, among the first to fourth lower contact 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 comes into contact with the cushioning member 34 of the stopper 33 of the lower guide member 3, the mover 4 is restrained from moving further toward the other side in the Y direction with respect to the lower guide member 3.

As shown in FIG. 13, the mover 4 moves from the initial state to 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 part. 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 separated 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, when 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, the mover 4 further moves upward. The third upper contact member 44 contacts the third upper inclined surface 213 in a state of heading toward the one side in the X direction with respect to the guide member 2. At this time, since the first upper contact member 42 is separated from the first upper inclined surface 211 and also separated 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 cushioning material 24 of the stopper 23 of the upper guide member 2, the movement of the mover 4 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 to 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 part. 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 is also separated from the second upper inclined surface 212. 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, when 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, the mover 4 is further moved. The fourth upper contact member 45 contacts the fourth upper inclined surface 214 in a state of heading toward the other side in the X direction with respect to the upper guide member 2. At this time, since the second upper contact member 43 is separated from the second upper inclined surface 212 and also separated 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 cushioning material 24 of the stopper 23 of the upper guide member 2, the movement of the mover 4 toward the other side in the X direction with respect to the upper guide member 2 is restricted.

As shown in FIG. 17A, when 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. 17B. Is expressed by Expression (1), and the restoring force (horizontal force) F ₂ due to the inclination of the third upper inclined surface 213 shown in FIG. 17C is expressed by Expression (2). Note that, in FIG. 17, in order to make it easier to understand the difference between the inclination angle θ ₁ of the first upper inclined surface 211 of the upper guide member 2 and the inclination angle θ _{2 of} the third upper inclined surface 213, compared with other drawings. The dimensions in the X direction are scaled down.

Here, since θ ₂ >θ ₁ , F ₂ >F ₁ .
Further, when the friction coefficient of the first upper contact member 42 is μ ₁ =0.1, the restoring force F ₁ acting on the upper guide member 2 is expressed by the equation (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 will act. If tan θ ₁ ≧μ ₁ , the residual displacement can be completely removed, but it is described in JP 2011-201873 A that the residual displacement can be removed even with a value corresponding to 1/2 to 1/10. Has been done. As described above, in this embodiment, it can be seen that the same effect can be obtained without installing the constant force 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 formulas (1) and (3), and 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 represented by F2 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 contact members 42 to 45 and the first to fourth lower contact members 46 to 49 slide, inclination The restoring force characteristic of the seismic isolation mechanism 1A according to the present embodiment is a combination of the restoring force characteristics (F ₁ =Wtan θ ₁ , F ₂ =Wtan θ ₂ ) and the restoring force characteristics of the stoppers 23 and 33.
In FIG. 18, L1 indicates a range where the inclination angles of the upper contact surface 21 and the lower contact surface 31 are θ ₁ , and L2 indicates a range where the inclination angle of the upper contact surface 21 and the lower contact surface 31 is θ ₂ . Showing.

Next, the operation and effect of the seismic isolation mechanism 1A according to the first embodiment described above 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 from the initial state so that the mover 4 faces the one side in the X direction with respect to the upper guide member 2, the mover 4 is inclined by the first upper tilt. Compared with the relative displacement toward the one side in the X direction along the surface 211, the relative displacement toward the one side in the X direction along the third upper inclined surface 213 of the mover 4 is decelerated by the inclination angle. The mover 4 can be prevented from moving to the one side in the X direction with respect to the third upper inclined surface 213, and the mover 4 can be prevented from coming off the upper guide member 2.
Similarly, since the gradient of the fourth upper sloping surface 214 with respect to the horizontal plane is configured to be larger than the gradient of the second upper sloping surface 212 with respect to the horizontal plane, the mover 4 has a greater slope than the fourth upper sloping surface 214. It is possible to suppress the movement to the other side in the X direction, and it is possible to prevent the mover 4 from coming off 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 from the initial state so that the mover 4 faces the one side in the Y direction with respect to the upper guide member 2, the mover 4 is inclined to the first lower tilt. Compared with the relative displacement toward the one side in the Y direction along the surface 311, the relative displacement toward the one side in the X direction along the third lower inclined surface 313 of the mover 4 is decelerated by the inclination angle. The mover 4 can be prevented from moving to the one side in the Y direction with respect to the third upper inclined surface 213, and the mover 4 can be prevented from coming off the lower guide member 3.
Similarly, since the gradient of the fourth lower inclined surface 314 with respect to the horizontal plane is larger than the gradient of the second lower inclined surface 312 with respect to the horizontal plane, the mover 4 has a greater inclination 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.

Further, 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 relatively displaced, the seismic isolation mechanism 1A can be downsized.
Further, the first to fourth upper abutting members 42 to 45 and the first to fourth lower abutting members 46 to 49 are configured as sliding members that are slidable on the inclined surfaces, respectively. In comparison with the case where the first to fourth upper contact members 42 to 45 and the first to fourth lower contact members 46 to 49 are rolling members capable of rolling on the inclined surface, The withstand load per seismic 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 portions as those of the above-described first embodiment will be denoted by the same reference numerals and description thereof will be omitted, and The different configuration will be described.
As shown in FIG. 19, the seismic isolation mechanism 1B according to the second embodiment has a third upper contact member 44B, a fourth upper contact member 45B, a third lower contact member 48B, and a fourth lower part of the mover 4B. The contact member 49B is composed of three rollers (rolling members) 7, 7, 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 in the same manner as 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 contact member 44B are arranged between the pair of upper projecting plate portions 412, 412 with their axes extending in the Y direction. It is supported by 412 so as to be rotatable around its axis. The three rollers 7, 7, 7 are arranged along the first upper virtual sloping surface 75a having a planar shape that gradually decreases toward the 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. It is set to the same θ ₂ as the inclination angle of the horizontal plane. For this reason, when the mover 4B is arranged below the third upper inclined surface 213 (see FIG. 14), the three rollers 7, 7, 7 come into contact with the third upper inclined surface 213 and move to the third roller 7, respectively. It is configured to be rollable along the upper inclined surface 213.

The three rollers 7, 7, 7 of the fourth upper abutment member 45B are arranged between the pair of upper projecting plate portions 412, 412 in a posture in which the axis extends in the Y direction, and the pair of upper projecting plate portions 412, 412. It is supported by 412 so as to be rotatable around its axis. The three rollers 7, 7, 7 are arranged along the second upper virtual sloping surface 75b, which is a flat upper surface and gradually lowers toward 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. It is set to the same θ ₂ as the inclination angle of the horizontal plane. For this reason, when the mover 4B is arranged below the fourth upper inclined surface 214 (see FIG. 16), the three rollers 7, 7, 7 come into contact with the fourth upper inclined surface 214 and move to the fourth It is configured to be rollable along the upper inclined surface 214.

The three rollers 7, 7, 7 of the third lower contact member 48B are arranged between the pair of lower projecting plate portions 413, 413 with the axes extending in the X direction, and the pair of lower projecting plate portions 413, 413 are provided. It is supported by 413 so as to be rotatable around its axis. The three rollers 7, 7, 7 are arranged along a planar first lower virtual inclined surface 75c which gradually becomes the upper side toward the 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. It is set to the same θ ₂ as the inclination angle of the horizontal plane. For this reason, when the mover 4B is arranged above the third lower inclined surface 313 (see FIG. 10), the three rollers 7, 7, 7 come into contact with the third lower inclined surface 313 and the third lower portion, respectively. It is configured to be able to roll along the inclined surface 313.

The three rollers 7, 7, 7 of the fourth lower contact member 49B are arranged between the pair of lower projecting plate portions 413, 413 with their axes extending in the X direction. It is supported by 413 so as to be rotatable around its axis. The three rollers 7, 7, 7 are arranged along a planar second lower virtual inclined surface 75d that gradually becomes the upper side 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. It is set to the same θ ₂ as the inclination angle of the horizontal plane. For this reason, when the mover 4B is arranged above the fourth lower inclined surface 314 (see FIG. 12), the three rollers 7, 7, 7 contact the fourth lower inclined surface 314 and the fourth lower portion, respectively. It is configured to be able to roll along the inclined surface 314.

As shown in FIG. 20, these rollers 7, 7... Include a tubular body 71 such as a pipe arranged on the outer peripheral portion, a shaft portion 72 inserted into the tubular body 71, a shaft portion 72 and a pipe body, respectively. The damping material 73 filled between the body 71 and the inner peripheral surface of the body 71. A viscoelastic body or the like is used as the damping material 73.

In the seismic isolation mechanism 1B according to the second embodiment, since the third upper contact member 44B of the mover 4B is composed of the rollers 7, 7, 7, the upper guide member 2 is provided 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 upper inclined surface 211 and the third upper inclined surface 213 are moved. When the roller passes through the boundary and comes into contact with the third upper inclined surface 213, the rollers 7, 7, 7 of the third upper contact member 44B roll to absorb the impact of the contact.
Further, since the fourth upper contact member 45B of the mover 4B is composed of the rollers 7, 7, 7, the mover 4 heading toward the other side in the X direction with respect to the upper guide member 2 has the first upper inclination. When passing through the boundary between the surface 211 and the second upper inclined surface 212 and contacting the second upper inclined surface 212, or when 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 second contact member 214 is contacted, the rollers 7, 7, 7 of the fourth contact member roll to absorb the impact of contact.
Due to these, the mover 4 and the upper guide member 2 can be smoothly displaced relative to each other.

Further, since the third lower contact member 48B of the mover 4B is composed of the rollers 7, 7, 7, the mover 4 heading toward the one side in the Y direction with respect to the lower guide member 3 has the first lower inclination. When passing the boundary between the surface 311 and the second lower sloping surface 312 and making contact with the first lower sloping surface 311, or passing through the boundary between the first lower sloping surface 311 and the third lower sloping surface 313, the third lower sloping surface When contacting 313, the rollers 7, 7, 7 of the third lower contact member 48B roll to absorb the impact of contact.
Further, since the fourth lower contact member 49 of the mover 4 is composed of the rollers 7, 7, 7, the mover 4 heading to the other side in the Y direction with respect to the lower guide member 3 has the first lower tilt. When passing through the boundary between the surface 311 and the second lower sloping surface 312 and contacting the second lower sloping surface 312, or when passing through the boundary between the second lower sloping surface 312 and the fourth lower sloping surface 314, the fourth lower sloping surface When contacting 314, the rollers 7, 7, 7 of the fourth lower contact member 49B roll to absorb the impact of contact.
Due to these, the mover 4 and the lower guide member 3 can be smoothly displaced relative to each other.

Further, the rollers 7, 7, 7 have the damping members 73 for damping the impact with the upper contact surface 21 and the lower contact surface 31, respectively. , 7 can absorb the impact when the upper contact surface 21 or the lower contact surface 31 comes into contact, 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. You can
The rollers 7, 7, 7 of the third and fourth upper abutment members 44, 45 and the third and fourth lower abutment members are similar to the first upper abutment member 42 and the second upper abutment member 43. Since the coefficient of friction is smaller than that of a sliding member, the mover 4 can easily return to the initial position even if only by 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. _{It is 2} .
The two first upper inclined surfaces 211C and 211C are arranged at positions overlapping with each other when viewed in the Y direction. The portions of the two first upper inclined surfaces 211C and 211C on one side in the X direction and the portions of the third upper inclined surface 213C on the other side in the X direction are arranged at positions that overlap when viewed in the Y direction. A portion where the two first upper inclined surfaces 211C and 211C and the third upper inclined surface 213C overlap each other when viewed from the Y direction is referred to 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 provided on both sides of the fourth upper inclined surface 214C in the Y direction. Are 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 surface is θ as in the above embodiment. _{It is 2} .
The two second upper inclined surfaces 212C and 212C are arranged at positions overlapping with each other when viewed in the Y direction. The portions of the two second upper inclined surfaces 212C and 212C on the other side in the X direction and the portions of the fourth upper inclined surface 214C on the one side in the X direction are arranged at positions that overlap when viewed in the Y direction. A portion where the two second upper inclined surfaces 212C and 212C and the fourth upper inclined surface 214C overlap each other when viewed from the Y direction is referred to 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 provided on both sides of the third lower inclined surface 313C in the X direction. Are 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. _{It is 2} .
The two first lower inclined surfaces 311C and 311C are arranged at positions overlapping with each other when viewed in the X direction. The portions of the two first lower inclined surfaces 311C and 311C on one side in the Y direction and the portions of the third lower inclined surface 313C on the other side in the Y direction are arranged at positions that overlap with each other when viewed in the X direction. A portion where the two first lower inclined surfaces 311C and 311C and the third lower inclined surface 313C overlap with each other when viewed from the X direction is referred to 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 provided on both sides of the fourth lower inclined surface 314C in the X direction. Are 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. _{It is 2} .
The two second lower inclined surfaces 312C and 312C are arranged at positions overlapping with each other when viewed in the X direction. The portions of the two second lower inclined surfaces 312C and 312C on the other side in the Y direction and the portions of the fourth lower inclined surface 314C on the one side in the Y direction are arranged at positions that overlap when viewed in the X direction. A portion where these two second lower inclined surfaces 312C and 312C and the fourth lower inclined surface 314C overlap each other when viewed from the X direction is referred to 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, and the third First upper contact members 42C and 42C are provided on both sides of the upper contact member 44C in the Y direction.
The inclination angle of the upper surfaces 42a of the first upper contact members 42C, 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 contact members 42C, 42C are configured to be in surface contact with the first upper inclined surfaces 211C, 211C, respectively. The third upper contact member 44C is configured to be in 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 member is 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 surfaces 43a of the second upper contact members 43C, 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 contact members 43C, 43C are configured to be in surface contact with the second upper inclined surfaces 212C, 212C, respectively. The fourth upper contact member 45C is configured to be in surface contact with the fourth upper inclined surface 214C.

The first lower contact member 46C and the third lower contact member 48C of the mover 4C are not arranged in the Y direction, and the first lower contact member is provided on both sides of the third lower contact member 48C in the Y direction. 46C and 46C are provided. The inclination angle of the lower surface 46a of the first lower contact members 46C, 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 contact 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 in 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 member is 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, 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 in surface contact with the fourth lower inclined surface 314C.

In the seismic isolation mechanism 1C as described above, in the initial state, as shown in FIG. 21, the upper center portion 21a of the upper guide member 2C and the lower center portion 31a of the lower guide member 3C are vertically overlapped with each other. The mover 4C is arranged 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 in the vertical direction without overlapping.
In addition, the fourth upper contact member 45C is separated from the second upper inclined surface 212C without vertically overlapping.

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 in the vertical direction without overlapping.
Further, the fourth lower contact member 49C is separated from the second lower inclined surface 312C in the vertical direction without overlapping.

As shown in FIG. 24, the movable element 4C faces the one side in the Y direction with respect to the lower guide member 3C from the initial state, and the first lower contact member 46C moves the first lower contact member 46C to the first lower overlap region 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 separated from the first lower inclined surface 311C, among the first to fourth lower contact members 46C to 49C. Only the first lower contact member 46C contacts the lower contact surface 31C, and the second to fourth lower contact members 47 to 49C are separated from the lower contact surface 31C. Note that FIG. 24 also shows a state in which the mover 4C is arranged above the first lower inclined surface 311C and a state where it is arranged above the second lower inclined surface 312C.

As shown in FIG. 25, when the mover 4C further faces the one side in the Y direction with respect to the lower guide member 3C and reaches the first lower overlapping region 315, the first lower contact member 46C moves the first lower inclined surface. 311C is contacted, and the third lower contact member 48C is contacted with the third lower inclined surface 313C. At this time, among the first to fourth lower contact members 46C to 49C, the first and third lower contact members 48C contact the lower contact surface 31C, and the second and fourth lower contact members 49C move downward. The contact surface 31C is separated from the contact surface 31C. Note that, in FIG. 25, a state in which the mover 4C is arranged 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 is also shown. The display of the structure 11 is omitted.

In a state in which the mover 4C further faces the 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 of the first to fourth lower contact members 46C to 49C is in lower contact. It comes into contact with the surface 31C, and the first, second, and fourth lower contact members 49C are separated from the lower contact surface 31C.

Returning to FIG. 24, the second lower contact member 47C moves from the initial state to the other side in the Y direction with respect to the lower guide member 3C, and the second lower contact member 47C tilts to the second lower tilt until the second lower overlapping range 316. Abut on the surface 312C. At this time, since the first lower contact member 46C is separated from the first lower inclined surface 311C and also separated from the second lower inclined surface 312C, among the first to fourth lower contact members 46C to 49C. Only the second lower contact member 47C contacts the lower contact surface 31C, and the first, third, and fourth lower contact members 46C, 48C, 49C are separated from the lower contact surface 31C.

As shown in FIG. 25, when the mover 4C further faces the other side in the Y direction with respect to the lower guide member 3C and reaches the second lower overlapping region 316, the second lower contact member 47C causes the second lower inclined surface to move. The fourth lower contact member 49C contacts the third lower surface 314C and the fourth lower contact member 49C contacts the fourth lower inclined surface 314C. At this time, of the first to fourth lower contact members 46C to 49C, the second and fourth lower contact members 49C contact the lower contact surface 31C, and the first and third lower contact members 46C and 48C. Is separated from the lower contact surface 31C.

The fourth lower contact member 49C contacts the fourth lower inclined surface 314C in a state in which the mover 4C further extends from the second lower overlapping region 316 toward the other side in the Y direction with respect to the lower guide member 3C. 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 of the first to fourth lower contact members 46C to 49C is in lower contact. It comes into contact with the surface 31C, and the second, third and fourth lower contact members 46C, 47C, 49C are separated from the lower contact surface 31C.

As shown in FIG. 26, the mover 4C faces the one side in the X direction with respect to the upper guide member 2C from the initial state, and the first upper contact member 42C first upper portion until the first upper overlapping range 215. It contacts the inclined surface 211C. At this time, since the second upper contact member 43C is separated from the second upper inclined surface 212C and also separated from the first upper inclined surface 211C, among the first to fourth upper contact members 42C to 45C. Only the first upper contact member 42C contacts the upper contact surface 21C, and the second to fourth upper contact members 43C to 45C are separated from the upper contact surface 21C. In addition, in FIG. 26, the state where the mover 4C is arranged below the first upper inclined surface 211C and the state where it is arranged above the second upper inclined surface 212C are also shown.

As shown in FIG. 27, when the mover 4C further faces the 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 moves the first upper inclined surface. The second upper contact member 44C contacts the second upper inclined surface 213C. At this time, of the first to fourth upper abutment members 42C to 45C, the first and third upper abutment members 44C abut the lower abutment surface 31C, and the second and fourth lower abutment members 47C and 49C. Is separated from the lower contact surface 31C. Note that, in FIG. 27, the state in which the mover 4C is arranged below the first upper overlapping area 215, the third upper inclined surface 213C, the second upper overlapping area 216, and the fourth upper inclined surface 214C is also shown. The display of the lower structure 12 is omitted.

In a state in which the mover 4C further faces the 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 of the first to fourth upper contact members 42C to 45C is in upper contact. It comes into contact with the surface 21C, and the first, second, and fourth upper contact members 42C, 43C, 45C are separated from the upper contact surface 21C.

Returning to FIG. 26, while the mover 4C moves from the initial state to the other side in the X direction with respect to the upper guide member 2C, and until the second upper overlapping range 216, the second upper contact member 43C tilts to the second upper tilt. It abuts the surface 212C. At this time, the first upper contact member 42C is separated from the first upper inclined surface 211C and also separated from the second upper inclined surface 212C, so that among the first to fourth upper contact members 42C to 45C. Only the second upper contact member 43C contacts the upper contact surface 21C, and the first, third and fourth upper contact members 42C, 44C, 45C are separated from the upper contact surface 21C.

As shown in FIG. 27, when the mover 4C further faces 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 causes the second upper inclined surface to move. 212C, and the fourth upper contact member 45C contacts the fourth upper inclined surface 214C. At this time, of the first to fourth upper contact members 42C to 45C, the second and fourth upper contact members 45C contact the upper contact surface 21C, and the first and third upper contact members 42C and 44C. Is separated from the upper contact surface 21C.

In a state in which the mover 4C further extends from the second upper overlapping area 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 of the first to fourth upper contact members 42C to 45C is the upper contact surface. 21C, and the first to third upper contact members 42C to 44C are separated from the upper contact surface 21C.

According to the seismic isolation mechanism 1C of the third embodiment, the same effect as that of the first embodiment can be obtained.
Further, by moving the mover 4C toward the one side in the X direction in the first upper overlapping range 215, the relative displacement between the mover 4C and the upper guide member 2C can be decelerated, and the mover 4C By moving the second upper overlapping area 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. As a result, the mover 4C does not move significantly in the X direction, so that the length of the upper guide member 2C in the X direction can be suppressed.

Further, by moving the mover 4C in the first lower overlapping range 315 toward one side in the Y direction, the relative displacement between the mover 4C and the lower guide member 3C can be decelerated, and the mover 4C By moving the second lower overlapping area 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. As a result, the mover 4C does not move significantly in the Y direction, so that the length of the upper guide member 2C in the Y direction can be suppressed.

Further, in 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).

Therefore, 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, it is possible to decelerate at a desired position.

Although the embodiments of the seismic isolation mechanism according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the spirit thereof.
For example, in the above-described first embodiment, the first to fourth upper contact members 42 to 45 are configured to be slidable on the upper contact surface 21, but may be configured to be rollable. Further, the first to fourth lower contact members 46 to 49 are configured to be slidable on the lower contact surface 31, but may be configured to be rollable.
In addition, in the above-described second embodiment, the third upper contact member 44, the fourth upper contact member 45, the third lower contact member 48, and the fourth lower contact member 49 each include three rollers 7, Although the number of rollers 7 is 7, the number of rollers 7 may be set appropriately.
Further, in the second embodiment described above, the first to fourth upper abutment members 42 to 45 and the first to fourth lower abutment members 46 to 49 are configured by the roller 7, but instead of the roller 7. It may be composed of a bearing.
Further, in the above embodiment, the roller 7 has the damping material 73, but the damping material 73 may not be provided.

Further, 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. Is formed, a third lower inclined surface 313 is formed on one side in the Y direction of the first lower inclined surface 311, and a fourth lower inclined surface 314 is formed on the other side in the Y direction of the second lower inclined surface 312. There is. On the other hand, an inclined surface having a larger gradient is formed on one side of the third upper inclined surface 213 in the X direction, and an inclined surface having a greater inclination is formed on the other side of the fourth upper inclined surface 214 in the X direction. An inclined surface having a larger gradient is formed on one side of the third lower inclined surface 313 in the Y direction, and an inclined surface having a greater inclination is formed on the other side of the fourth lower inclined surface 314 in the Y direction. The mover 4C may move and be decelerated.

Further, in the above-described third embodiment, the first upper inclined surface 211C is arranged on both sides of the third upper inclined surface 213C in the Y direction, and the second upper inclined surface 212C is arranged in the Y direction of the fourth upper inclined surface 214C. The first lower inclined surface 311C is arranged on both sides of the third lower inclined surface 313C in the X direction, and the second lower inclined surface 312C is arranged on both sides of the fourth lower inclined surface 314C in the X direction. Has been done. On the other hand, the third upper inclined surfaces 213C are arranged on both sides of the first upper inclined surface 211C in the Y direction, and the fourth upper inclined surfaces 214C are arranged on both sides of the second upper inclined surface 212C in the Y direction. The third lower inclined surface 313C may be arranged on both sides of the first lower inclined surface 311C in the X direction, and the fourth lower inclined surface 314C may be arranged on both sides of the second lower inclined surface 312C in the X direction.

1A-1C Seismic isolation mechanism 2,2C Upper guide member 3,3C Lower guide member 4,4B,4C Mover 5 Intersection 7 Roller (rolling member)
11 Upper structure 12 Lower structure 13 Seismic isolation layer 21, 21C Upper contact surface 21a Upper central part 23 Stopper 31, 31C Lower contact surface 31a Lower central part 33 Stopper 42, 42C First upper contact member 43, 43C 2nd upper contact member 44,44B,44C 3rd upper contact member 45,45B,45C 4th upper contact member 46,46C 1st lower contact member 47,47C 2nd 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 4 upper inclined surface 215 first upper overlapping range 216 second upper overlapping area 311 311C first lower inclined surface 312, 312C second lower inclined surface 313, 313C third lower inclined surface 314, 314C fourth lower inclined surface 315th 1 Lower overlap range 316 Second lower overlap range

Claims (4)

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 the upper portion of the lower structure,
It is interposed between the upper guide member and the lower guide member, is relatively displaceable in one horizontal direction with the upper guide member, and is horizontal with the lower guide member and orthogonal to the one horizontal direction. And a mover capable of relative displacement in the direction,
The upper guide member has an upper contact surface with which the mover abuts,
The upper abutment surface includes a first upper inclined surface disposed on one side of the one horizontal direction from an upper center portion which is the one center portion in the horizontal direction, and the one horizontal direction from the upper center portion. A second upper sloping surface disposed on the other side, a third upper sloping surface disposed on the one horizontal direction side of the first upper sloping surface, and a second upper sloping surface of the second upper sloping surface. A fourth upper sloping surface disposed on the other side of the one horizontal direction,
The first upper sloping surface is formed in a plane that gradually goes to the lower side from the upper central portion toward the one horizontal direction side,
The second upper sloping surface is formed in a plane that gradually goes downward from the upper central portion toward the other side in the one horizontal direction,
The third upper sloping surface is formed in a plane that gradually goes downward with a greater gradient than the first upper sloping surface toward one side in the one horizontal direction,
The fourth upper sloping surface is formed into a flat surface that gradually goes downward with a greater gradient than the second upper sloping surface toward the other side in the one horizontal direction.
The lower guide member has a lower contact surface with which the mover abuts,
The lower abutment surface includes a first lower inclined surface disposed on one side of the other horizontal direction from a lower center portion which is the other horizontal center portion, and a lower center portion of the other lower contact portion. A second lower sloping surface arranged on the other side in the horizontal direction, a third lower sloping surface arranged on the other horizontal direction from the first lower sloping surface, and a second lower sloping surface. Also has a fourth lower inclined surface disposed on the other side in the other horizontal direction,
The first lower sloping surface is formed in a plane that gradually increases toward the upper side from the lower central portion toward the other side in the horizontal direction,
The second lower sloping surface is formed in a plane that gradually increases toward the other side from the lower central portion toward the other side in the other horizontal direction,
The third lower sloping surface is formed in a plane that gradually increases toward the upper side with a gradient larger than that of the first lower sloping surface toward one side in the other horizontal direction.
The fourth lower sloping surface is formed in a plane that gradually increases toward the other side in the other horizontal direction with a gradient larger than that of the second lower sloping surface.
The mover includes a main body,
A first upper contact member that is fixed to the main body and can contact the first upper inclined surface;
A second upper contact member that is fixed to the main body and is capable of contacting the second upper inclined surface;
A third upper contact member that is fixed to the main body and is capable of contacting the third upper inclined surface;
A fourth upper contact member that is fixed to the main body and can contact the fourth upper inclined surface;
A first lower contact member that is fixed to the main body and can contact the first lower inclined surface;
A second lower contact member that is fixed to the main body and can contact the second lower inclined surface;
A third lower contact member that is fixed to the main body and can contact the third lower inclined surface;
A fourth lower contact member that is fixed to the main body and can contact the fourth lower inclined surface;
In the 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 causes the second upper abutting member to contact the second upper portion. The third upper contact member and the fourth upper contact member are separated from the upper contact surface by contacting the inclined surface, and the mover is arranged above the lower central portion, The first lower contact member contacts the first lower inclined surface, the second lower contact member contacts the second lower inclined surface, and the third lower contact member and the fourth lower contact member Separated from the lower contact surface,
With respect to the upper guide member, the first upper contact member is relatively displaced with respect to the upper guide member toward the one side in the horizontal direction, and the first upper contact member contacts the first upper inclined surface. Until the third upper contact member contacts the third upper inclined surface, the first upper contact member contacts the first upper inclined surface, the second upper contact member, and the second upper contact member. 3 upper contact member and the fourth upper contact member are separated from the upper contact surface,
With respect to the upper guide member, the second upper contact member is displaced relative to the upper guide member toward the other side in the one horizontal direction, and the second upper contact member contacts 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, the first upper contact member, and the first upper contact member. 3 upper contact member and the fourth upper contact member are separated from the upper contact surface,
From the state in which the first upper abutment member abuts the first upper inclined surface and the third upper abutment member abuts the third upper inclined surface, the first horizontal member is aligned with the first guide member. When relatively displaced to the one side in the direction of the upper guide member, the third upper contact member contacts 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 the second upper inclined surface and the fourth upper abutting member abuts the fourth upper inclined surface, the one horizontal position with respect to the upper guide member is set. When the fourth upper contact member abuts against the fourth upper inclined surface when the relative displacement with the upper guide member toward the other side of the direction, the first upper contact member, the second upper contact member. , And the third upper contact member is separated from the upper contact surface,
With respect to the lower guide member, the first lower contact member is displaced relative to the lower guide member toward one side of the other horizontal direction, and the first lower contact member contacts the first lower inclined surface. Until the third lower contact member contacts the third lower inclined surface, the first lower contact member contacts the first lower inclined surface, the second lower contact member, and the second lower contact member. 3 lower contact member and the fourth lower contact member are separated from the lower contact surface,
While being relatively displaced from the initial state to the lower guide member toward the other side in the other horizontal direction with respect to the lower guide member, the second lower contact member contacts the second lower inclined surface, and Until the fourth lower contact member contacts the fourth lower inclined surface, the second lower contact member contacts the second lower inclined surface, the first lower contact member, and the first lower contact member. 3 lower contact member and the fourth lower contact member are separated from the lower contact surface,
From the state in which the first lower contact member contacts the first lower inclined surface and the third lower contact member contacts the third lower inclined surface, the other horizontal position with respect to the lower guide member. When the relative displacement with the lower guide member is made toward 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 where the second lower abutment member abuts the second lower inclined surface and the fourth lower abutment member abuts the fourth lower inclined surface, the second lower abutting member is further horizontal to the lower guide member. When the lower guide member is relatively displaced toward the other side in 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 sloping surface and the third upper sloping surface are arranged at positions different from each other in the horizontal direction, and a portion of the first upper sloping surface on one side in the horizontal direction, A portion of the third upper inclined surface on the other side in the one horizontal direction has a first upper overlapping range where the third upper inclined surface overlaps when viewed from the other horizontal direction, and the mover is below the first upper overlapping range. In the state of being located on the side, the first upper contact member contacts the first upper inclined surface, the third upper contact member contacts the third upper inclined surface, and the second upper contact member contacts the third upper inclined surface. The contact member and the fourth upper contact member are separated from the upper contact surface,
The second upper sloping surface and the fourth upper sloping surface are arranged at positions different from each other in the horizontal direction, and a portion of the second upper sloping surface on the other side in the one horizontal direction, A portion of the fourth upper inclined surface on one side in the 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. In the state of being located on the side, the second upper contact member contacts the second upper inclined surface, the fourth upper contact member contacts the fourth upper inclined surface, and the first upper contact member The contact member and the third upper contact member are separated from the upper contact surface,
The first lower sloping surface and the third lower sloping surface are arranged at positions shifted in the one horizontal direction, and a portion of the first lower sloping surface on one side in the other horizontal direction, A portion of the third lower inclined surface on the other side in the other horizontal direction has a first lower overlapping range when viewed from the one horizontal direction, and the mover is above the first lower overlapping range. 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 The member and the fourth lower contact member are separated from the lower contact surface,
The second lower sloping surface and the fourth lower sloping surface are arranged at positions shifted in the one horizontal direction, and a portion of the second lower sloping surface on the other side in the other horizontal direction, A portion of the fourth lower inclined surface on the one side in the other horizontal direction has a second lower overlapping range when seen from the one horizontal direction, and the mover is above the second lower overlapping range. The second lower contact member contacts the second lower inclined surface and the fourth lower contact member contacts the fourth lower inclined surface, the first lower contact member A seismic isolation mechanism, wherein the member and the third lower contact member are separated from the lower contact surface. The first upper abutment member, the second upper abutment member, the third upper abutment member, and the fourth upper abutment member are configured as sliding members capable of sliding on the upper abutment surface,
The first lower abutment member, the second lower abutment member, the third lower abutment member, and the fourth lower abutment member are configured as sliding members capable of sliding on the lower abutment surface. The seismic isolation mechanism according to claim 1, wherein: The first upper abutting member and the second upper abutting member are configured by sliding members capable of sliding on the upper abutting surface,
The third upper contact member and the fourth upper contact member are rolling members capable of rolling on the upper contact surface,
The first lower abutting member and the second lower abutting member are configured by sliding members capable of sliding on the lower abutting surface,
The seismic isolation mechanism according to claim 1, wherein the third lower contact member and the fourth lower contact member are rolling members that can roll on the lower contact surface. The rolling members constituting the third upper abutment member, the fourth upper abutment member, the third lower abutment member, and the fourth lower abutment member are impacts of contact with rolling surfaces, respectively. The seismic isolation mechanism according to claim 3, further comprising a damping material for damping the vibration.

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