JP2019215049A - Seismic isolator - Google Patents

Abstract

To provide a new seismic isolator capable of suppressing an occurrence of buckling while alleviating an impact in a collision.SOLUTION: A seismic isolator 1 includes a laminate structure 10. A stopper part 40 having a contact surface F that can come in contact with the laminate structure 10 is arranged outside at least one of an upper end part and a lower end part of the laminate structure 10. The contact surface F is inclined with respect to a vertical direction so as to separate from the laminate structure 10 as it heads from one of the upper end and the lower end of the laminate structure 10 to the other of the upper end and the lower end, and includes a first contact surface F1 that can come in contact with the laminate structure 10 at an initial stage of the contact, and a second contact surface F2 that can come in contact with the laminate structure after the contact of the first contact surface F1.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seismic isolation device.

  In a conventional seismic isolation device, an annular stopper member is arranged on the outer periphery of a laminated structure in which rigid layers and elastic layers are alternately arranged, and a contact surface of the stopper member is inclined ( For example, see Patent Document 1.) According to the stopper member, buckling of the laminated structure can be prevented, and the impact generated at the time of collision with the laminated structure can be reduced by gentle contact with the laminated structure.

JP 2012-17806 A

  However, even in the seismic isolation device described in Patent Document 1, the collision between the laminated structure and the stopper member is quite severe. For this reason, there is a possibility that damage occurring inside the building and the laminated structure installed on the seismic isolation device described in Patent Literature 1 may also increase. Therefore, the seismic isolation device described in Patent Literature 1 has room for improvement in impact mitigation at the time of collision.

  An object of the present invention is to provide a novel seismic isolation device that can suppress the occurrence of buckling while relaxing the impact at the time of a collision.

  The seismic isolation device according to the present invention includes a laminated structure in which rigid layers and elastic layers are alternately arranged in the vertical direction, and at least one of an upper end and a lower end of the laminated structure is provided outside the laminated structure. A stopper portion having a contact surface capable of contacting the laminated structure is disposed, and the contact surface extends from the upper or lower end of the laminated structure toward the other of the upper or lower end, from the laminated structure. A first contact surface that is inclined with respect to the vertical direction so as to be away from the first contact surface and that can be contacted at an initial stage of contact with the laminated structure, and a first contact surface that can be contacted after contact with the first contact surface. And two contact surfaces. ADVANTAGE OF THE INVENTION According to the seismic isolation apparatus which concerns on this invention, generation | occurrence | production of buckling can be suppressed, relaxing the impact at the time of a collision. In the present invention, the contact surface of the stopper portion may have at least two contact surfaces, that is, a first contact surface and a second contact surface. For this reason, the present invention includes a case where a third contact surface or the like that can be contacted after contact with the second contact surface is provided.

  In the seismic isolation device according to the present invention, the contact surface has a plurality of the first contact surfaces and a plurality of the second contact surfaces, and the first contact surface and the second contact surface alternately. Preferably, they are arranged. In this case, it is possible to reduce variations in impact mitigation at the time of collision and suppression of buckling, depending on the direction of shaking due to an earthquake or the like.

  In the seismic isolation device according to the present invention, it is preferable that the first contact surface and the second contact surface extend in a lateral direction. In this case, the impact at the time of collision can be reduced in a wider range around the laminated structure.

  In the seismic isolation device according to the present invention, it is preferable that the first contact surface and the second contact surface extend in a vertical direction. In this case, the impact at the time of collision can be reduced in a wider range in the vertical direction of the laminated structure.

  In the seismic isolation device according to the present invention, it is preferable that the height of the stopper portion is 5% to 40% of the height of the laminated structure. In this case, the occurrence of buckling can be suppressed more effectively while reducing the impact at the time of collision.

  In the seismic isolation device according to the present invention, it is preferable that the first contact surface is made of an elastic material. In this case, the impact at the beginning of the collision can be more effectively reduced.

  The stopper is preferably an annular stopper. In this case, the occurrence of buckling can be suppressed over the entire periphery of the laminated structure while reducing the impact at the time of collision.

  ADVANTAGE OF THE INVENTION According to the seismic isolation apparatus which concerns on this invention, generation | occurrence | production of buckling can be suppressed, relaxing the impact at the time of a collision.

It is a side view showing roughly the seismic isolation device concerning a 1st embodiment of the present invention. It is sectional drawing of FIG. It is a perspective view which shows the stopper member which concerns on the seismic isolation device of FIG. 1 with a laminated structure. FIG. 4 is a longitudinal sectional view showing a stopper member of FIG. 3. FIG. 7 is a longitudinal sectional view showing a modification of the stopper member of FIG. 3. It is a perspective view showing other modifications of a stopper member with a layered structure. FIG. 6 is a longitudinal sectional view showing the stopper member of FIG. 5. It is a longitudinal cross-sectional view which shows another modification of a stopper member.

  Hereinafter, seismic isolation devices according to various embodiments of the present invention will be described with reference to the drawings. In the following description, substantially the same items are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 1, reference numeral 1 denotes a seismic isolation device according to an embodiment of the present invention. The seismic isolation device 1A includes a laminated structure 10, a lower plate 20, an upper plate 30, and a stopper member (stopper portion) 40.

  As shown in FIG. 2, the laminated structure 10 has rigid layers 11 and elastic layers 12 alternately arranged in the vertical direction (vertical direction, height direction). The seismic isolation device 1 has a center axis O extending in the up-down direction. The central axis O is a vertical axis when the seismic isolation device 1 is erected.

  The rigid layer 11 is a layer having rigidity. In the present embodiment, the rigid layer 11 is made of a circular metal plate, specifically, a circular steel plate. The elastic layer 12 is a layer having elasticity capable of deforming and restoring. In the present embodiment, the elastic layer 12 is a circular elastic plate, specifically, a circular rubber plate. In the present embodiment, the rigid layer 11 and the elastic layer 12 have the same thickness. However, the thicknesses of the rigid layer 11 and the elastic layer 12 can be appropriately changed. Further, in the present embodiment, the outer edge in the width direction of the rigid layer 11 is covered with the outer layer 13 together with the elastic layer 12. The outer layer 13 is a cylindrical rubber plate. The outer layer 13 can be omitted.

  The lower end of the laminated structure 10 is fixed to the upper end 20e1 of the lower plate 20. The lower end 20e2 of the lower plate 20 can be fixed to a foundation (not shown) supporting a structure (not shown) such as a building, a bridge, or a house. The upper end of the laminated structure 10 is fixed to the lower end 30e1 of the upper plate 30. The upper end 30e2 of the upper plate 30 can be fixed to the structure, for example. In the present embodiment, the lower plate 20 and the upper plate 30 are formed of a circular stainless steel plate.

  The stopper member 40 can be disposed outside at least one of the upper end and the lower end of the laminated structure 10. In the present embodiment, the stopper member 40 includes a lower end stopper member 40 and an upper end stopper member 40. The lower end stopper member 40 is fixed to the upper end 20 e 1 of the lower plate 20. Thus, the stopper member 40 at the lower end is disposed outside the lower end of the laminated structure 10. The stopper member 40 at the upper end is fixed to the lower end 30e1 of the upper plate 30. Thus, the stopper member 40 at the upper end is disposed outside the upper end of the laminated structure 10.

  FIG. 3 shows a stopper member 40A according to the seismic isolation device 1 of FIG. In the present embodiment, the stopper member 40A is an annular stopper member as illustrated in FIG. Thereby, in the present embodiment, the stopper member 40A surrounds the laminated structure 10 over the entire circumference in the circumferential direction (direction around the central axis O). In the present embodiment, as described above, they are arranged at the upper end and the lower end of the laminated structure 10, respectively. Note that FIG. 3 shows only the lower end stopper member 40A.

  FIG. 4A shows the shape of the stopper member 40A in a cross section including the central axis O (hereinafter, also referred to as “longitudinal cross section”). The stopper member 40 </ b> A has a contact surface F that can contact the laminated structure 10. The contact surface F of the stopper member 40A contacts the outer surface of the laminated structure 10 (in the present embodiment, the outer layer 13), thereby suppressing buckling of the laminated structure 10. In the present embodiment, the contact surface F includes a first contact surface F1 that can be contacted at an initial stage of contact with the laminated structure 10, and a second contact surface F2 that can be contacted after contact with the first contact surface F1. And

  As shown in FIG. 4A, in the present embodiment, the first contact surface F1 is a convex surface formed on the inner peripheral surface of the stopper member 40A. In the present embodiment, the second contact surface F2 is an inclined surface formed on the inner peripheral surface of the stopper member 40A. As shown in FIG. 4A, the second contact surface F2 is inclined outward (in this embodiment, radially outward) from the lower end 40e1 to the upper end 40e2 of the stopper member 40A in a side view (vertical sectional view). are doing.

  In the present embodiment, the stopper member 40 </ b> A is configured by a convex part 41 and a main body part 42. The protrusion 41 protrudes from the inner peripheral surface of the main body 42. In the present embodiment, the first contact surface F1 is a convex surface of the convex portion 41. In the present embodiment, the second contact surface F2 is the inner peripheral surface of the main body 42. The inner peripheral surface of the main body 42 is inclined outward from the lower end to the upper end of the main body 42. In the present embodiment, the lower end of the main body 42 is the lower end 40e1 of the stopper member 40A. In the present embodiment, the upper end of the main body 42 is the upper end 40e2 of the stopper member 40A. That is, in the present embodiment, the second contact surface F2 is an inclined surface that is inclined outward from the lower end 40e1 of the stopper member 40A toward the upper end 40e2. In other words, as shown in FIG. 2, the contact surface F moves vertically from the lower end 10 e 1 or the upper end 10 e 2 of the laminated structure 10 to the other of the lower end 10 e 1 or the upper end 10 e 2, so as to move away from the laminated structure 10. It is inclined to.

  In this embodiment, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. ing.

  In the present embodiment, the plurality of convex portions 41 are arranged at an interval in the up-down direction with respect to the inner peripheral surface of the main body portion 42. In FIG. 4A, the contact surface F of the stopper member 40A has two first contact surfaces F1 and three second contact surfaces F2, and the first contact surface F1 and the second contact surface F2 are vertically aligned. They are arranged alternately.

  Further, in the present embodiment, the first contact surface F1 and the second contact surface F2 extend in the lateral direction. In this specification, the “lateral direction” refers to a direction orthogonal to the central axis O or a circumferential direction.

  In the present embodiment, the protrusion 41 is a protrusion extending in the circumferential direction. In the present embodiment, the convex portion 41 is an annular convex portion extending over the entire circumference in the circumferential direction. In the present embodiment, the main body 42 is a main body extending in the circumferential direction. In the present embodiment, the main body 42 is an annular main body that extends over the entire circumference in the circumferential direction. That is, in the present embodiment, the first contact surface F1 and the second contact surface F2 extend over the entire circumference in the circumferential direction.

  When the contact surface of the stopper member is a uniform surface as in the conventional seismic isolation device, when the laminated structure 10 is deformed in the lateral direction (radial direction), the uniform contact surface is outside the laminated structure 10. By colliding with the side surface, buckling of the laminated structure 10 can be suppressed. However, since such a stopper member has a uniform contact surface colliding with the laminated structure 10 at a time, the collision with the laminated structure 10 is quite severe.

  On the other hand, according to the seismic isolation device 1 according to the present embodiment, when the laminated structure 10 is deformed in the lateral direction, the stopper member 40A is provided outside at least one of the upper end and the lower end of the laminated structure 10. After contacting the side surface at the first contact surface F1, the contact is made at the second contact surface F2. That is, according to the present embodiment, the stopper member 40A comes into contact with the laminated structure 10 in two stages, and does not come into contact at once as in the related art.

  Therefore, according to the seismic isolation device 1 of the present embodiment, the occurrence of buckling can be suppressed while reducing the impact at the time of collision. In particular, according to the present embodiment, the stopper member 40A is provided with a degree of relationship between the first contact surface F1 and the second contact surface F2, for example, a contact area of the first contact surface F1 and a contact area of the second contact surface F2. By appropriately adjusting at least one of the contact area, the step between the first contact surface F1 and the second contact surface F2, and the like, the impact can be more appropriately mitigated.

  In this embodiment, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. ing. In this case, it is possible to reduce variations in impact mitigation at the time of collision and suppression of buckling, depending on the direction of shaking due to an earthquake or the like.

  In particular, in the present embodiment, the first contact surface F1 and the second contact surface F2 extend in the lateral direction. In this case, the impact at the time of collision can be reduced in a wider range around the laminated structure 10.

  Particularly, in the present embodiment, the stopper member 40A is an annular stopper portion. In this case, the occurrence of buckling can be suppressed over the entire circumference of the laminated structure 10 while reducing the impact at the time of collision.

  By the way, in the present embodiment, the protrusion 41 and the main body 42 can be made of the same or different materials. The protrusion 41, that is, the first contact surface F1 can be made of, for example, a metal or an elastic material. Further, the main body portion 42, that is, the second contact surface F2 can also be made of, for example, a metal or an elastic material. Examples of the metal include an aluminum alloy and stainless steel. Examples of the elastic material include rubber and resin. Further, as the resin, for example, high-hardness urethane is used.

  In this embodiment, the first contact surface F1 is preferably made of an elastic material. In this case, the impact at the beginning of the collision can be more effectively reduced. In the present embodiment, the first contact surface F1 is made of rubber. Specifically, the protrusion 41 is made of rubber. In this case, the protrusion 41 can be vulcanized and bonded to the inner peripheral surface of the main body 42.

  Next, FIG. 4B is a longitudinal sectional view showing a stopper member 40B which is a modification of the stopper member 40A. The stopper member 40 </ b> B has a concave portion (groove portion) 43 instead of providing the convex portion 41 on the main body portion 42.

  As shown in FIG. 4B, in the present modification, the first contact surface F1 is an inclined surface formed on the inner peripheral surface of the stopper member 40B. In the present modification, the second contact surface F2 is a concave surface formed on the inner peripheral surface of the stopper member 40B.

  In the present modification, the stopper member 40B includes a main body 42 and a recess 43. The recess 43 is recessed from the inner peripheral surface of the main body 42. In the present modification, the first contact surface F1 is the inner peripheral surface of the main body 42. That is, in the present modification, the first contact surface F1 is an inclined surface that is inclined outward from the lower end 40e1 of the stopper member 40B toward the upper end 40e2. In other words, in the stopper member 40B, similarly to the stopper member 40A, the contact surface F moves away from the laminated structure 10 as it goes from the lower end 10e1 or the upper end 10e2 of the laminated structure 10 to the other of the lower end 10e1 or the upper end 10e2. , Which are inclined with respect to the vertical direction. Further, in the present modification, the second contact surface F2 is a concave surface of the concave portion 43.

  In this modification, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. ing.

  In the present modification, a plurality of recesses 43 are arranged at an interval in the up-down direction with respect to the inner peripheral surface of the main body 42. In FIG. 4B, the contact surface F of the stopper member 40B has three first contact surfaces F1 and two second contact surfaces F2, and the first contact surface F1 and the second contact surface F2 are vertically aligned. They are arranged alternately.

  Furthermore, in this modification, the first contact surface F1 and the second contact surface F2 extend in the lateral direction.

  In the present modification, the concave portion 43 is a concave portion extending in the circumferential direction. In this modification, the concave portion 43 is an annular concave portion extending over the entire circumference in the circumferential direction. That is, also in this modified example, the first contact surface F1 and the second contact surface F2 extend over the entire circumference in the circumferential direction. In the present modification, by providing the concave portion 43 in the main body portion 42, the rigidity of the main body portion 42 can be reduced, and the entire contact surface F can be made elastic (flexible).

  According to the present modification, similarly to the stopper member 40A, when the laminated structure 10 is deformed in the lateral direction, the stopper member 40B is arranged on the outer surface of at least one of the upper end and the lower end of the laminated structure 10. After making contact on the first contact surface F1, it makes contact on the second contact surface F2. That is, according to the present modification, the stopper member 40B comes into contact with the laminated structure 10 in two stages, similarly to the stopper member 40A, and does not come into contact at once as in the conventional case.

  Therefore, according to the present modification, as in the case of the stopper member 40A, the occurrence of buckling can be suppressed while reducing the impact at the time of collision. Also in this modification, the stopper member 40B is provided with a degree of relationship between the first contact surface F1 and the second contact surface F2, for example, a contact area of the first contact surface F1 and a contact area of the second contact surface F2. By appropriately adjusting at least one of the contact area and the step between the first contact surface F1 and the second contact surface F2, the impact can be more appropriately mitigated.

  Also in this modification, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. Have been. Therefore, also in the present embodiment, it is possible to reduce the variation in the impact mitigation at the time of the collision and the suppression of the occurrence of the buckling in accordance with the direction of the shaking due to the earthquake or the like.

  Also in this modification, the first contact surface F1 and the second contact surface F2 extend in the lateral direction. In this case, the impact at the time of collision can be reduced in a wider range around the laminated structure 10.

  Particularly, in the present modification, the stopper member 40B is an annular stopper portion. In this case, the occurrence of buckling can be suppressed over the entire circumference of the laminated structure 10 while reducing the impact at the time of collision.

  In this modification, the first contact surface F1 is preferably made of an elastic material. In this case, the impact in the early stage of the collision can be effectively reduced. In this modification, the first contact surface F1 is made of rubber. Specifically, the main body 42 is made of rubber. Further, in the present modification, the contact surface F is provided with the concave portion 43 in the main body portion 42, so that the stopper member 40B can be made of only the same material.

  FIG. 5 shows a stopper member 40 </ b> C, which is a modification of the stopper member 40, together with the laminated structure 10. In this modification, the stopper member 40C is an annular stopper member, like the stopper member 40A.

  FIG. 6A shows the shape of the stopper member 40C in a vertical cross section. The stopper member 40C has a contact surface F that can make contact with the laminated structure 10. The contact surface F of the stopper member 40C contacts the outer surface of at least one of the upper end portion and the lower end portion of the laminated structure 10, thereby suppressing buckling of the laminated structure 10. Also in this modification, the contact surface F has a first contact surface F1 that can be contacted at an initial stage, and a second contact surface F2 that can be contacted after contact with the first contact surface F1.

  As shown in FIG. 6A, in the present modification, the first contact surface F1 is a convex surface formed on the inner peripheral surface of the stopper member 40C. In the present modification, the second contact surface F2 is an inclined surface formed on the inner peripheral surface of the stopper member 40.

  In the present modified example, the stopper member 40C includes a convex portion 44 and a main body portion 42. The protrusion 44 projects from the inner peripheral surface of the main body 42. In this modification, the first contact surface F1 is a convex surface of the convex portion 44. In the present modification, the second contact surface F2 is the inner peripheral surface of the main body 42. That is, in the present embodiment, the second contact surface F2 is an inclined surface that is inclined outward from the lower end 40e1 of the stopper member 40 toward the upper end 40e2. In other words, in the stopper member 40C, similarly to the stopper member 40A, the contact surface F moves away from the laminated structure 10 as it goes from the lower end 10e1 or the upper end 10e2 of the laminated structure 10 to the other of the lower end 10e1 or the upper end 10e2. , Which are inclined with respect to the vertical direction.

  In this modification, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. ing.

  In this modification, a plurality of convex portions 44 are arranged at intervals in the circumferential direction with respect to the inner peripheral surface of the main body portion 42. In FIG. 6A, the contact surface F of the stopper member 40C has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surface F1 and the second contact surface F2 extend in the circumferential direction. They are arranged alternately.

  Further, in this modification, the first contact surface F1 and the second contact surface F2 extend in the up-down direction.

  In the present modification, the protrusion 44 is a protrusion extending in the up-down direction. In the present modified example, the convex portion 44 is a linear convex portion extending entirely in the vertical direction from the lower end 40e1 to the upper end 40e2 of the stopper member 40C. That is, in the present modification, the first contact surface F1 and the second contact surface F2 extend over the entirety of the stopper member 40C in the vertical direction.

  According to the present modification, the stopper member 40C is provided on at least one of the outer surface of the upper end portion and the lower end portion of the laminated structure 10 when the laminated structure 10 is deformed in the lateral direction, similarly to the stopper members 40A and 40B. On the other hand, after making contact on the first contact surface F1, the contact is made on the second contact surface F2. That is, according to the present modification, the stopper member 40C also comes into contact with the laminated structure 10 in two stages, and does not contact at once as in the conventional case.

  Therefore, according to the present modification, as in the respective embodiments having the stopper members 40A or 40B, the occurrence of buckling can be suppressed while reducing the impact at the time of collision. Also in this modification, the stopper member 40C is provided with a degree of relationship between the first contact surface F1 and the second contact surface F2, for example, a contact area of the first contact surface F1 and a contact area of the second contact surface F2. By appropriately adjusting at least one of the contact area and the step between the first contact surface F1 and the second contact surface F2, the impact can be more appropriately mitigated.

  Also in this modification, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. Have been. For this reason, also in the present modification, it is possible to reduce the variation in the impact mitigation at the time of collision and the suppression of the occurrence of buckling in accordance with the direction of shaking due to an earthquake or the like.

  In the present modification, the first contact surface F1 and the second contact surface F2 extend in the up-down direction. In this case, the impact at the time of collision can be reduced in a wider range in the vertical direction of the laminated structure 10. Particularly, in the present modification, the first contact surface F1 and the second contact surface F2 extend over the entire upper and lower ends of the stopper member 40C. In this case, the impact at the time of collision can be further reduced.

  By the way, also in the present modification, the convex portion 44 and the main body portion 42 can be made of the same or different materials. The protrusion 44, that is, the first contact surface F1 can be made of, for example, a metal or an elastic material.

  In this modification, the first contact surface F1 is preferably made of an elastic material. In this case, the impact at the beginning of the collision can be more effectively reduced. In this modification, the first contact surface F1 is made of rubber. Specifically, the protrusion 44 is made of rubber.

  Next, FIG. 6B is a longitudinal sectional view showing a stopper member 40D which is a modification of the stopper member 40C. The stopper member 40D has a concave portion (groove portion) 45 instead of the convex portion 44 provided on the main body portion 42.

  As shown in FIG. 6B, in the present modification, the first contact surface F1 is an inclined surface formed on the inner peripheral surface of the stopper member 40D. In the present modification, the second contact surface F2 is a concave surface formed on the inner peripheral surface of the stopper member 40D.

  In the present modified example, the stopper member 40D includes a main body 42 and a recess 45. The recess 45 is recessed from the inner peripheral surface of the main body 42. In the present modification, the first contact surface F1 is the inner peripheral surface of the main body 42. That is, in the present modification, the first contact surface F1 is an inclined surface that is inclined outward from the lower end 40e1 of the stopper member 40D toward the upper end 40e2. In other words, in the stopper member 40D, similarly to the stopper member 40A, the contact surface F moves away from the laminated structure 10 as it goes from the lower end 10e1 or the upper end 10e2 of the laminated structure 10 to the other of the lower end 10e1 or the upper end 10e2. , Which are inclined with respect to the vertical direction. In the present modification, the second contact surface F2 is a concave surface of the concave portion 45.

  In this modification, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. ing.

  In the present modification, a plurality of recesses 45 are arranged at intervals in the circumferential direction with respect to the inner peripheral surface of the main body 42. In FIG. 6B, the contact surface F of the stopper member 40D has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surface F1 and the second contact surface F2 extend in the circumferential direction. They are arranged alternately.

  Furthermore, in the present embodiment, the first contact surface F1 and the second contact surface F2 extend in the up-down direction.

  In the present modification, the concave portion 45 is a concave portion extending in the up-down direction. In the present modification, the concave portion 45 is a linear concave portion extending over the entirety of the stopper member 40D in the vertical direction. That is, also in this modification, the first contact surface F1 and the second contact surface F2 extend over the entirety of the stopper member 40D in the vertical direction. In the present modification, as in the case of the stopper member 40B, by providing the concave portion 45 in the main body portion 42, the rigidity of the main body portion 42 can be reduced, and the entire contact surface F can be made elastic (flexible).

  According to the present modification, similarly to the stopper member 40C, when the laminated structure 10 is deformed in the lateral direction, the stopper member 40D is disposed on at least one of the upper end and the lower end of the laminated structure 10. After making contact on the first contact surface F1, it makes contact on the second contact surface F2. That is, according to the present modified example, the stopper member 40D contacts the laminated structure 10 in two stages similarly to the stopper member 40C, and does not contact at once as in the conventional case.

  Therefore, according to the present modification, as in the case of the stopper member 40C, it is possible to suppress the occurrence of buckling while reducing the impact at the time of collision. Also in this modification, the stopper member 40D is provided with a degree of the relationship between the first contact surface F1 and the second contact surface F2, for example, a contact area of the first contact surface F1 and a contact area of the second contact surface F2. By appropriately adjusting at least one of the contact area and the step between the first contact surface F1 and the second contact surface F2, the impact can be more appropriately mitigated.

  Also in this modification, the contact surface F has a plurality of first contact surfaces F1 and a plurality of second contact surfaces F2, and the first contact surfaces F1 and the second contact surfaces F2 are alternately arranged. Have been. Therefore, also in the present embodiment, it is possible to reduce the variation in the impact mitigation at the time of the collision and the suppression of the occurrence of the buckling in accordance with the direction of the shaking due to the earthquake or the like.

  Also in this modification, the first contact surface F1 and the second contact surface F2 extend in the up-down direction. In this case, the impact at the time of collision can be reduced in a wider range in the vertical direction of the laminated structure 10. In particular, in the present modification, the first contact surface F1 and the second contact surface F2 extend over the entire upper and lower ends of the stopper member 40D. In this case, the impact at the time of collision can be further reduced.

  In this modification, the first contact surface F1 is preferably made of an elastic material. In this case, the impact at the beginning of the collision can be more effectively reduced. In this modification, the first contact surface F1 is made of rubber. Specifically, the main body 42 is made of rubber. Further, in the present embodiment, since the contact surface F is provided with the concave portion 45 in the main body portion 42, the stopper member 40D can be composed only of the same material.

  Further, in the seismic isolation device according to the present invention, as shown in FIG. 1, when the height (length in the vertical direction) of the laminated structure 10 is H1 and the height of the stopper member 40 is H4, the stopper member 40 Is preferably 5% to 40% of the height H1 of the laminated structure 10. In this case, it is possible to effectively suppress the occurrence of buckling while reducing the impact at the time of collision. Specifically, when it is 5% or more, the effect of suppressing the occurrence of buckling is large. In addition, when it is 40% or less, it is expected that the collision will be moderate. Still more preferably, when the height H4 of the stopper member 40 is 20% to 30% of the height H1 of the laminated structure 10, the occurrence of buckling while more effectively reducing the impact at the time of collision is more effective. Can be suppressed.

  As described above, according to each embodiment of the present invention, it is possible to provide a seismic isolation device capable of suppressing the occurrence of buckling while reducing the impact at the time of a collision.

  The foregoing merely discloses some embodiments of the present invention, and various modifications are possible in accordance with the appended claims. The various configurations employed in the above-described embodiments can be appropriately replaced with each other. For example, according to the present invention, the main body 42 of the stopper member 40 can be provided with convex portions (41, 44) and concave portions (43, 45). In this case, the contact surface F of the stopper member 40 can be a three-stage contact of the first contact surface F1, the second contact surface F2, and the third contact surface F3. Further, the stopper member 40 is not limited to an annular member. For example, the stopper member 40 can be configured as a plurality of members arranged at intervals in the circumferential direction, or as one member.

  1: seismic isolation device, 10: laminated structure, 10e1: lower end of laminated structure, 10e2: upper end of laminated structure, 11: rigid layer, 12: elastic layer, 20 lower plate, 30 upper plate, 40, 40A ~ 40D: stopper member, 41: convex portion, 42: main body portion, 43: concave portion, 44: convex portion, 45: concave portion, F: contact surface, F1: first contact surface, F2: second contact surface, H1: lamination Structure height, H4: Stopper member height

Claims (7)

Equipped with a laminated structure in which rigid layers and elastic layers are alternately arranged in the vertical direction,
Outside at least one of the upper end and the lower end of the laminated structure, a stopper having a contact surface capable of contacting the laminated structure is arranged,
The contact surface is inclined with respect to the up and down direction so as to move away from the laminated structure as it goes from the upper end or the lower end of the laminated structure toward the other of the upper end or the lower end,
A seismic isolation device having a first contact surface that can contact at an initial stage of contact with the laminated structure and a second contact surface that can contact after contact with the first contact surface.   The said contact surface has a some 1st contact surface and a some 2nd contact surface, The said 1st contact surface and the said 2nd contact surface are arrange | positioned alternately, The said 1st contact surface. The seismic isolation device described.   The seismic isolation device according to claim 1, wherein the first contact surface and the second contact surface extend in a lateral direction.   The seismic isolation device according to any one of claims 1 to 3, wherein the first contact surface and the second contact surface extend in a vertical direction.   The seismic isolation device according to any one of claims 1 to 4, wherein a height of the stopper portion is 5% to 40% of a height of the laminated structure.   The seismic isolation device according to any one of claims 1 to 5, wherein the first contact surface is made of an elastic material.   The seismic isolation device according to any one of claims 1 to 6, wherein the stopper portion is an annular stopper portion.

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