JP2019039533A - Slide pendulum type base isolation device - Google Patents

Abstract

To provide a slide pendulum type base isolation device capable of performing dustproof measures even in a case where a dustproof cover cannot be installed.SOLUTION: A slide pendulum type base isolation device 1 comprises: a concave surface plate 10 having a lower slide surface 4 with a center of curvature positioned above, and fixed to a lower structure 2; a concave surface plate 10 having an upper slide surface 5 with a center of curvature positioned below, and fixed to an upper structure 3; a slide body 6 supporting the upper slide surface 5 on the lower slide surface 4; and a closing member 9 closing a gap between the lower side surface 4 and a peripheral end edge 7 of the upper slide surface 5. The closing member 9 has an open hole 19 supporting the slide body 6 in a horizontal direction, and is composed of sponge rubber.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sliding pendulum type seismic isolation device that suppresses transmission of earthquake vibrations.

  Conventionally, such a sliding pendulum type seismic isolation device is used to support the upper structure on the lower structure and to suppress the vibration of the earthquake from being transmitted from the lower structure to the upper structure. ing. The seismic isolation device typically includes a partially spherical lower sliding surface fixed to the lower structure, a partially spherical upper sliding surface fixed to the upper structure, and a lower sliding surface. And a sliding body that supports the upper sliding surface in a slidable state with respect to the lower sliding surface and the upper sliding surface (see Patent Documents 1 to 3).

  Such seismic isolation devices are called spherical sliding bearings in Patent Documents 1 and 2, and when an earthquake occurs, the sliding body that supports the upper structure on the lower sliding surface is the upper and lower sliding surfaces. It slides on the sliding surface, and when the earthquake stops, it returns to its original position by the pendulum principle. Thus, the seismic isolation device performs a damping function that absorbs the energy of the earthquake and a restoration function that returns the shaking structure to its original position.

  Therefore, in order for such a function to be normally performed when an earthquake occurs, it is necessary that the sliding body can slide on the upper sliding surface and the lower sliding surface without any trouble. Therefore, in the conventional sliding pendulum type seismic isolation device, the upper sliding surface and the lower sliding surface are provided in order to prevent dust or the like that prevents the sliding from entering the upper sliding surface and the lower sliding surface. A dust-proof cover or the like in which a rubber plate is fastened with a band is installed on the outer periphery of the constituent members.

JP-A-2006-138582 Japanese Patent Laid-Open No. 11-324397 JP 2000-46104 A

  However, when installing a seismic isolation device in a place where partial seismic isolation that isolates a part of a building or a post-construction seismic isolation that isolates a part of an existing building afterwards, the lower and upper sliding surfaces Is composed of plate-like members embedded in the upper surface of the lower structure and the lower surface of the upper structure, and the outer peripheral surface of the plate-like member does not protrude from the upper and lower surfaces, The dust cover cannot be installed.

  An object of the present invention is to provide a sliding pendulum type seismic isolation device capable of taking a dustproof measure even when the dustproof cover cannot be installed as described above, in view of the problems of the prior art.

The sliding pendulum type seismic isolation device according to the first invention is:
A lower member fixed to the lower structure having a lower spherical sliding surface with a partial spherical surface located above the center of curvature;
An upper member fixed to the upper structure having a partially spherical upper sliding surface in which the center of curvature is located below;
A lower support surface and an upper support surface, wherein the lower support surface and the upper support surface are slidably in contact with the lower slide surface and the upper slide surface, respectively, and the lower slide surface and the upper support surface A sliding pendulum type seismic isolation device comprising a sliding body disposed between the upper sliding surface and
A closing member that is disposed between the lower sliding surface and the upper sliding surface and closes at least part of the circumferential direction between the peripheral edge of the lower sliding surface and the peripheral edge of the upper sliding surface. It is characterized by providing.

  According to the first aspect of the present invention, at least part of the circumferential direction edge between the peripheral edge of the lower sliding surface and the peripheral edge of the upper sliding surface is closed by the closing member, thereby It is possible to prevent dust and the like from entering the lower sliding surface and the upper sliding surface from the place. This prevents the smooth sliding between the lower sliding surface or the upper sliding surface and the sliding body from being disturbed by dust, and ensures the normal operation of the sliding pendulum type seismic isolation device when an earthquake occurs. it can.

  A sliding pendulum type seismic isolation device according to a second invention is the sliding pendulum type seismic isolation device according to the first invention, wherein the blocking member has a contact surface for contacting the sliding body and positioning the sliding body in a horizontal direction, and generating an earthquake. The sliding body has flexibility so as not to prevent sliding between the lower supporting surface and the upper supporting surface of the sliding body and the lower sliding surface and the upper sliding surface.

  According to the second invention, since the blocking member does not prevent the sliding body from sliding when an earthquake occurs, the original function of the sliding pendulum type seismic isolation device can be exhibited without any problems when an earthquake occurs. Here, flexibility means ease of deformation both in the case of plastic deformation and in the case of elastic deformation.

  On the other hand, in order to reliably perform the restoration function of the sliding pendulum type seismic isolation device, it is necessary to arrange the sliding body at the center of the upper sliding surface and the lower sliding surface. For this reason, when installing the seismic isolation device, conventionally, the center position of the lower sliding surface is measured and the sliding body is arranged at the center position, and the upper side is carefully taken so that the sliding body does not move from the position. It is necessary to arrange a sliding surface.

  In this regard, according to the second invention, when the sliding pendulum type seismic isolation device is installed, the closing member is disposed on the lower sliding surface, and the sliding body is further disposed so as to contact the contact surface of the closing member. Thus, the sliding body can be easily positioned and supported in the horizontal direction on the lower sliding surface. When the upper sliding surface is arranged, the sliding body is positioned and supported on the lower sliding surface in the horizontal direction by the closing member, so that the sliding body does not deviate from the support position on the lower sliding surface. There is no need to be careful, and the upper sliding surface can be easily placed on the lower sliding surface.

A sliding pendulum type seismic isolation device according to a third invention is the first or second invention,
The lower sliding surface is connected to the upper surface of the lower structure through a peripheral wall surface rising from the peripheral edge thereof,
The upper sliding surface is connected to the lower surface of the upper structure through a peripheral wall surface falling from the peripheral edge thereof,
The closing member has an outer peripheral surface that is in contact with at least a part of the circumferential direction of the lower sliding surface and the peripheral wall surface of the upper sliding surface.

  According to the third invention, since the outer peripheral surface of the closing member is in contact with the peripheral wall surfaces of the lower sliding surface and the upper sliding surface at least in a part of the circumferential direction, the lower sliding surface and the part of the upper sliding surface. It is possible to effectively prevent dust and the like from entering the lower sliding surface and the upper sliding surface from between the peripheral edges corresponding to, and to maintain the function of the sliding pendulum type seismic isolation device more reliably.

  The sliding pendulum type seismic isolation device according to a fourth aspect of the present invention is characterized in that, in any one of the first to third aspects, the closing member is made of sponge rubber.

  According to the fourth aspect of the invention, since the closing member is made of sponge rubber, the sliding member is not prevented from sliding between the upper sliding surface and the lower sliding surface by the closing member when an earthquake occurs. . Therefore, the function of the sliding pendulum type seismic isolation device can be exhibited reliably.

It is sectional drawing which shows a mode that the sliding pendulum type seismic isolation apparatus which concerns on one Embodiment of this invention was installed between the lower structure and the upper structure. 2A is a plan view of a concave plate constituting a lower sliding surface and an upper sliding surface of the sliding pendulum type seismic isolation device of FIG. 1, and FIG. 2B is a side view thereof. It is a top view of the sliding body of the sliding pendulum type seismic isolation device of FIG. It is a top view of the obstruction | occlusion member of the sliding pendulum type seismic isolation device of FIG. FIG. 5A to FIG. 5D are cross-sectional views showing modifications of the closing member that can be used in the present invention. 6A is a sectional view showing another example of the sliding body of the sliding pendulum type seismic isolation device of FIG. 1, and FIG. 6B is a plan view thereof. FIG. 7A shows a state where an upper structure in which a sliding pendulum type seismic isolation device is applied to four corners is viewed from below. FIG. 7B is a side view of a part of the lower structure and the upper structure to which the sliding pendulum type seismic isolation device is applied.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a sliding pendulum type seismic isolation device 1 according to an embodiment of the present invention supports an upper structure 3 on a lower structure 2, and seismic vibrations move upward from the lower structure 2. Transmission to the structure 3 is suppressed.

  In FIG. 1, one sliding pendulum type seismic isolation device 1 between the lower structure 2 and the upper structure 3 is shown. The sliding pendulum type seismic isolation device 1 is provided at a plurality of necessary locations between the lower structure 2 and the upper structure 3.

  The sliding pendulum type seismic isolation device 1 includes a lower member fixed to the lower structure 2 and having a lower sliding surface 4, and an upper sliding surface 5 fixed to the upper structure 3 and facing the lower sliding surface 4. And a sliding body 6 that supports the upper sliding surface 5 in a slidable state on the lower sliding surface 4.

  The sliding body 6 has a lower support surface 6a and an upper support surface 6b, and the lower support surface 6a and the upper support surface 6b are slidably in contact with the lower slide surface 4 and the upper slide surface 5, respectively. It is arranged between the lower sliding surface 4 and the upper sliding surface 5. The peripheral edge 7 of the lower sliding surface 4 and the peripheral edge 7 of the upper sliding surface 5 are spaced apart from each other in the vertical direction.

  Between the lower sliding surface 4 and the upper sliding surface 5, it is located between the peripheral edge 7 of the lower sliding surface 4 and the peripheral edge 7 of the upper sliding surface 5 and between the peripheral edges 7. A disc-shaped closing member 9 having an outer peripheral portion 8 that closes the surface is disposed.

  The lower sliding surface 4 is a partially spherical surface having an upper center of curvature, and the upper sliding surface 5 is a partially spherical surface having a lower center of curvature. The lower sliding surface 4 and the upper sliding surface 5 have a symmetrical shape with respect to the horizontal plane between them. A line passing through both centers of curvature constitutes the central axis AX of the sliding pendulum type seismic isolation device 1.

  FIG. 2A is a plan view of a concave plate 10 constituting each of the lower member having the lower sliding surface 4 and the upper member having the upper sliding surface 5, and FIG. 2B is a side view thereof. The concave plate 10 is obtained, for example, by pressing a square stainless steel plate having a thickness of 1 mm and about 350 mm square obtained by shearing a stainless steel plate material. As the material of the stainless steel plate, for example, SUS304 can be used.

  The concave plate 10 has a lower sliding surface 4 or an upper sliding surface 5 formed in the center portion by the press working and a peripheral portion 11 thereof. On the four sides around the peripheral portion 11, there are sink marks 12 generated by the above press working.

  The lower sliding surface 4 and the upper sliding surface 5 are formed using a material such as polytetrafluoroethylene having a low friction coefficient in order to reduce the frictional resistance when the sliding body 6 slides on these surfaces. Also good. Moreover, you may form using the material from which static friction resistance and dynamic friction resistance differ significantly so that it may have the characteristic (trigger characteristic) that the sliding body 6 begins to slip after comparatively big shaking arises.

  Further, in the vicinity of each corner portion on the back surface of the peripheral portion 11, a stud bolt 13 provided with a male screw is fixed by CD welding. The stud bolt 13 has a role of preventing the concave plate 10 from being easily detached from the surface when the concave plate 10 is attached to the surface of the lower structure 2 or the upper structure 3 by being embedded with mortar. The lower sliding surface 4 and the upper sliding surface 5 have, for example, a radius of curvature of about 2000 mm and a diameter at the peripheral edge 7 of about 310 mm.

  Between the peripheral edge 7 of the part of the upper sliding surface 5 or the lower sliding surface 4 of the concave plate 10 and the peripheral part 11, it is the peripheral wall surface 14 formed with said press work. That is, in the sliding pendulum type seismic isolation device 1, as shown in FIG. 1, the lower sliding surface 4 is connected to the upper surface 15 of the lower structure 2 via the peripheral wall surface 14 rising from the peripheral edge 7. The sliding surface 5 is connected to the lower surface 16 of the upper structure 3 through a peripheral wall surface 14 that falls from the peripheral edge 7. The distance between the upper surface 15 of the lower structure 2 and the lower surface 16 of the upper structure 3 is, for example, about 15 mm.

  FIG. 3 is a plan view of the sliding body 6. For example, the sliding body 6 has a diameter of about 55 mm and a height of about 45 mm. The upper support surface 6 b is provided with a plurality of holes 18, and a solid lubricant is embedded in each hole 18. The upper support surface 6 b has the same radius of curvature as the upper sliding surface 5. The lower support surface 6a of the sliding body 6 has the same form.

  FIG. 4 is a plan view of the closing member 9. As shown in the figure, a through-hole 19 constituting a contact surface for positioning the sliding body 6 in the horizontal direction is provided at the center of the closing member 9. The diameter of the through hole 19 is about the same as the diameter of the sliding body 6. As shown in FIG. 1, the outer peripheral portion 8 of the closing member 9 has an outer peripheral surface 20 in contact with the peripheral wall surface 14 of the lower sliding surface 4 and the upper sliding surface 5.

  The material constituting the closing member 9 is made of a flexible material such as sponge rubber so as not to prevent sliding between the sliding body 6, the lower sliding surface 4 and the upper sliding surface 5 when an earthquake occurs. Is done. That is, the closing member 9 only needs to be able to be deformed without impairing the function of the sliding pendulum type seismic isolation device 1 and prevent dust from entering the lower sliding surface 4 and the upper sliding surface 5.

  Specific examples of the sponge rubber include natural sponge rubber, chloroprene sponge rubber, ethylene propylene sponge rubber, nitrile sponge rubber, silicon sponge rubber, and styrene butadiene sponge rubber.

  The closing member 9 can be made of a flexible material other than sponge rubber, a material that can be elastically deformed, or the like. However, those that are destroyed at the time of the earthquake and whose fragments prevent the sliding body 6 from sliding are excluded.

  The sliding pendulum type seismic isolation device 1 is installed as follows, for example. First, a lower concrete plate in which a required number of concave plates 10 for the lower sliding surface 4 are embedded in a predetermined location, and a concave plate 10 for the upper sliding surface 5 corresponding to each concave plate 10 of the lower concrete are provided. Prepare an upper concrete board embedded in a predetermined location. The lower concrete plate and the upper concrete plate constitute the lower structure 2 and the upper structure 3 described above.

  Next, the closing member 9 is disposed on each concave plate 10 of the lower concrete plate, and the sliding body 6 is disposed in the through hole 19. Thereby, since the sliding body 6 is supported by the through-hole 19 in the horizontal direction, the sliding body 6 is easily positioned with respect to the center of the concave plate 10.

  Next, the upper concrete plate is moved while the central portion of the concave plate 10 for each upper sliding surface 5 is supported in the vertical direction by the sliding body 6 on the corresponding concave plate 10 for the lower sliding surface 4. Place above the lower concrete board. As a result, the lower concrete plate and the upper concrete plate face each other with an interval of about 15 mm, for example, and the installation of the sliding pendulum type seismic isolation device 1 is completed.

  When an earthquake occurs, a force in a direction shifted in the horizontal direction acts between the upper structure 3 and the lower structure 2. Thereby, the upper structure 3 and the lower structure 2 are swung relatively in a pendulum manner via the sliding bodies 6 between the respective lower sliding surfaces 4 and the corresponding upper sliding surfaces 5. The seismic isolation function of the sliding pendulum type seismic isolation device 1 is exhibited by this pendulum-shaped oscillation.

  During this time, since the closing member 9 between the lower sliding surface 4 and the upper sliding surface 5 is easily deformed, the seismic isolation function is not hindered. When the earthquake stops, the lower sliding surfaces 4 and the corresponding upper sliding surfaces 5 are caused by the functions of the lower sliding surfaces 4, the upper sliding surfaces 5 and the sliding bodies 6 and the action of gravity acting on the upper structure 3. Are positioned so that their central axes coincide. Thereby, the positional relationship between the upper structure 3 and the lower structure 2 returns to the state before the occurrence of the earthquake (restoration function).

  As described above, according to the present embodiment, the closing member 9 closes the space between the peripheral edge 7 of the lower sliding surface 4 and the peripheral edge 7 of the upper sliding surface. Thus, dust or the like enters the lower sliding surface 4 or the upper sliding surface 5 from between the peripheral edges 7 and smoothly slides between the lower sliding surface 4 or the upper sliding surface 5 and the sliding body 6. Can be prevented. Therefore, the seismic isolation function and the restoration function can be maintained for a long time so that the sliding pendulum type seismic isolation device 1 operates reliably when an earthquake occurs.

  Moreover, since the closing member 9 has the through-hole 19 which supports the sliding body 6, when installing the sliding pendulum type seismic isolation apparatus 1, the closing member 9 is arrange | positioned in the lower side sliding surface 4, and the through-hole is provided. By disposing the sliding body 6 at 19, the sliding body 6 can be easily disposed at the center of the lower sliding surface 4.

  When the upper sliding surface 5 is disposed on the lower sliding surface 4, the sliding body 6 is maintained at the center of the lower sliding surface 4 by the closing member 9. Thereby, it is not necessary to pay special attention so that the sliding body 6 does not deviate from the center of the lower sliding surface 4, and the upper sliding surface 5 can be easily disposed above the lower sliding surface 4.

  Further, since the outer peripheral surface 20 of the closing member 9 is in contact with the peripheral wall surface 14 of the lower sliding surface 4 and the upper sliding surface 5, dust or the like is generated between the peripheral edge 7 of the lower sliding surface 4 and the upper sliding surface 5. Can effectively be prevented from entering the lower sliding surface 4 and the upper sliding surface 5. Thereby, the function of the sliding pendulum type seismic isolation device 1 can be reliably maintained over a long period of time.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this. For example, the closing member 9 of FIG. 1 has a rectangular cross-sectional shape, but may be a closing member having other cross-sectional shapes, for example, the cross-sectional shapes shown in FIGS. 5A to 5D. Each of these closing members has the shape of a rotating body in which the respective cross-sectional shapes are rotated around the central axis AX.

  The blocking member 9b in FIG. 5A has a shape that covers the entire surface of the lower sliding surface 4 and the upper sliding surface 5 other than the portion in contact with the sliding body 6. A through hole 19b that reaches the upper sliding surface 5 from the lower sliding surface 4 is provided in the central portion of the closing member 9b in order to accommodate the sliding body 6 and support it in the horizontal direction.

  5B includes a cylindrical member 21 that reaches the upper sliding surface 5 from the lower sliding surface 4 at the center, and a disk-shaped member 22 that has a hole that contacts the outer surface of the cylindrical member 21. Inside the cylindrical member 21, the sliding body 6 is accommodated and supported in the horizontal direction.

  The closing member 9d in FIG. 5C has the same cross-sectional shape as the closing member 9b in FIG. 5A on the lower side. The upper side of the closing member 9d has a cross-sectional shape similar to that of the closing member 9c when the cylindrical member 21 and the disk-like member 22 of FIG. 5B are considered to be integral.

  The closing member 9e in FIG. 5D has a cross-sectional shape obtained by dividing the disk-like closing member 9 in FIG. 1 into two vertically and has a through hole 19c in which the sliding body 6 is disposed at the center. However, the peripheral edge of the closing member 9e is in contact with the peripheral edges of the lower sliding surface 4 and the upper sliding surface 5, and more effective between the peripheral edge of the lower sliding surface 4 and the peripheral edge of the upper sliding surface 5. Block. The closing member 9e may be divided into three or more.

  Further, as a sliding body disposed between the lower sliding surface 4 and the upper sliding surface 5, a sliding body 23 as shown in FIGS. 6A and 6B may be used instead of the sliding body 6 in FIG. Good. The sliding body 23 includes a cylindrical main body 24 and disk-shaped sliding materials 25 provided on the upper surface and the lower surface of the main body 24, respectively. The surface of the sliding material 25 on the lower surface side constitutes a lower support surface 25 a that contacts the lower sliding surface 4. The surface of the sliding member 25 on the upper surface side constitutes an upper support surface 25 b that contacts the upper sliding surface 5.

  The main body 24 is formed of resin or steel. The sliding material 25 is made of polytetrafluoroethylene or the like. The sliding material 25 is provided in the main body 24 by being embedded in recesses formed on the upper and lower surfaces of the main body 24.

  The thickness and size of the stainless steel plate constituting the concave plate 10, the curvature of the lower sliding surface 4 and the upper sliding surface 5, the diameter and the height of the sliding body 6, and the material of each portion. Is not limited to the above example, and is appropriately selected according to the weight of the lower structure 2 and the upper structure 3, the vibration frequency and amplitude of the target vibration isolation.

  Further, the closing member may close the gap between the peripheral edge 7 of the lower sliding surface 4 and the peripheral edge 7 of the upper sliding surface 5 in a necessary part in the circumferential direction. In this case, the outer peripheral surface of the closing member is in contact with the peripheral wall surface 14 of the lower sliding surface 4 and the upper sliding surface 5 at a portion corresponding to the part in the circumferential direction. That is, the closing member may not be a complete disc shape, and a part of the outer peripheral portion may be omitted.

  FIG. 7A shows a state in which the upper structure 3 in which the sliding pendulum type seismic isolation device 31 using such a closing member is applied to the four corners is viewed from below. FIG. 7B is a side view of a part of the lower structure 2 and the upper structure 3 to which the sliding pendulum type seismic isolation device 31 is applied. This sliding pendulum type seismic isolation device 31 differs from the sliding pendulum type seismic isolation device 1 of FIG. 1 only in the configuration of the blocking member, and is the same in other respects.

  As shown in FIGS. 7A and 7B, the closing member 9 f and the sliding body 6 are disposed between the concave plates 10 of each set of the lower structure 2 and the upper structure 3. Each closing member 9f has an arcuate shape along the peripheral wall surface 14 of the corresponding concave plate 10 so that only the corners of the four corners are closed, and the central side opposite to the corners is It has an omitted form.

  That is, each closing member 9f has a substantially fan shape, and has a shape in which a through hole for disposing the sliding body 6 is provided in a main portion thereof. Each closing member 9f has a peripheral edge 7 (see FIG. 1) of the lower sliding surface 4 and the upper sliding surface 5 between each set of concave plates 10 at the four corners of the lower structure 2 and the upper structure 3. It arrange | positions in the direction which obstruct | occludes the corner | angular part side of these four corners between.

  Thus, when installing a plurality of sliding pendulum type seismic isolation devices around the lower structure 2 and the upper structure 3, the lower structure 2 and the upper structure 3 in each sliding pendulum type seismic isolation device. By closing only the side facing the periphery with the closing member, it is possible to prevent intrusion of dust from the surrounding direction.

  Further, the closing member may be provided with a plurality of holes penetrating in the vertical direction as long as the closing member has a function of preventing the intrusion of dust and a function of supporting the sliding body in the horizontal direction. .

  In addition, the contact surface for positioning the sliding bodies 6 and 23 in the horizontal direction is such that the entire surface around the sliding bodies 6 and 23 is in contact with the contact surface formed by the through holes 19, 19b and 19c. It is not limited. The contact surface may be in contact with a part of the periphery of the sliding bodies 6 and 23 as long as the sliding bodies 6 and 23 can be positioned in the horizontal direction.

  DESCRIPTION OF SYMBOLS 1, 31 ... Sliding pendulum type seismic isolation device, 2 ... Lower structure, 3 ... Upper structure, 4 ... Lower sliding surface, 5 ... Upper sliding surface, 6, 23 ... Sliding body, 6a, 25a ... Lower side Support surface, 6b, 25b ... upper support surface, 7 ... peripheral edge, 8 ... outer peripheral portion, 9, 9b, 9c, 9d, 9e, 9f ... closing member, 10 ... concave plate, 11 ... peripheral portion, 12 ... sink , 13 ... CD stud, 14 ... peripheral wall surface, 15 ... upper surface, 16 ... lower surface, 18 ... hole, 19, 19b, 19c ... through hole, 20 ... outer peripheral surface, 21 ... cylindrical member, 22 ... disk-like member, 24 ... Main body, 25 ... Sliding material.

Claims (4)

A lower member fixed to the lower structure having a lower spherical sliding surface with a partial spherical surface located above the center of curvature;
An upper member fixed to the upper structure having a partially spherical upper sliding surface in which the center of curvature is located below;
A lower support surface and an upper support surface, wherein the lower support surface and the upper support surface are slidably in contact with the lower slide surface and the upper slide surface, respectively, and the lower slide surface and the upper support surface A sliding pendulum type seismic isolation device comprising a sliding body disposed between the upper sliding surface and
A closing member that is disposed between the lower sliding surface and the upper sliding surface and closes at least part of the circumferential direction between the peripheral edge of the lower sliding surface and the peripheral edge of the upper sliding surface. A sliding pendulum type seismic isolation device characterized by comprising:   The closing member has a contact surface for contacting the sliding body to position the sliding body in a horizontal direction, and the lower support surface and the upper support surface of the sliding body at the time of an earthquake and the The sliding pendulum type seismic isolation device according to claim 1, wherein the sliding pendulum type seismic isolation device has flexibility that does not prevent sliding between the lower sliding surface and the upper sliding surface. The lower sliding surface is connected to the upper surface of the lower structure through a peripheral wall surface rising from the peripheral edge thereof,
The upper sliding surface is connected to the lower surface of the upper structure through a peripheral wall surface falling from the peripheral edge thereof,
3. The sliding pendulum type according to claim 1, wherein the closing member has an outer peripheral surface that is in contact with a peripheral wall surface of the lower sliding surface and the upper sliding surface in at least a part of a circumferential direction thereof. Seismic isolation device. The sliding pendulum type seismic isolation device according to any one of claims 1 to 3, wherein the closing member is made of sponge rubber.