JP6836481B2 - Sliding pendulum type seismic isolation device - Google Patents

Description

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

Conventionally, such a sliding pendulum type seismic isolation device has been used to support the upper structure on the lower structure and suppress the vibration of the earthquake from being transmitted from the lower structure to the upper structure. ing. This seismic isolation device typically has 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. A sliding body that supports the upper sliding surface in a sliding state with respect to the lower sliding surface and the upper sliding surface is provided (see Patent Documents 1 to 3).

Such a seismic isolation device is called a spherical sliding bearing in Patent Documents 1 and 2, and when an earthquake occurs, a sliding body that supports the upper structure on the lower sliding surface is formed on the upper sliding surface and the lower side. It slides on the sliding surface and returns to its original position by the principle of pendulum when the earthquake subsides. As a result, the seismic isolation device has a damping function of absorbing the energy of the earthquake and a restoring function of returning the swaying structure to its original position.

Therefore, in order for such a function to be normally exerted in the event of an earthquake, 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, in order to prevent dust or the like that hinders such sliding from entering the upper sliding surface and the lower sliding surface, the upper sliding surface and the lower sliding surface are used. A dustproof cover or the like, in which a rubber plate is fastened with a band, is installed on the outer circumference of the constituent members.

Japanese Unexamined Patent Publication No. 2016-138592 Japanese Unexamined Patent Publication No. 11-324397 Japanese Unexamined Patent Publication No. 2000-46104

However, when a seismic isolation device is installed at a location where a part of the building is seismically isolated or a part of the existing building is seismically isolated after construction, the lower sliding surface and the upper sliding surface are installed. Is composed of a plate-shaped member 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-shaped member does not protrude from the upper surface and the lower surface, as described above. The dustproof cover cannot be installed.

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

The sliding pendulum type seismic isolation device according to the present invention
A lower member having a partially spherical lower sliding surface in which the center of curvature is located above and fixed to the lower structure,
An upper member having a partially spherical upper sliding surface in which the center of curvature is located below and being fixed to the upper structure,
The lower sliding surface and the upper supporting surface have a lower supporting surface and an upper supporting surface, and the lower supporting surface and the upper supporting surface are slidably in contact with the lower sliding surface and the upper sliding surface, respectively. A sliding pendulum type seismic isolation device provided with a sliding body arranged between the sliding surface and the upper sliding surface.
A closing member that is arranged between the lower sliding surface and the upper sliding surface and closes between the peripheral edge of the lower sliding surface and the peripheral edge of the upper sliding surface at least in a part in the circumferential direction. equipped with a,
The lower sliding surface is connected to the upper surface of the lower structure via a peripheral wall surface rising from the peripheral edge thereof.
The upper sliding surface is connected to the lower surface of the upper structure via a peripheral wall surface that rises from the peripheral edge thereof.
The closing member has an outer peripheral surface that is in contact with the peripheral wall surface of the lower sliding surface and the upper sliding surface in at least a part in the circumferential direction.

According to the first invention, at least a necessary part in the circumferential direction between the peripheral edge of the lower sliding surface and the peripheral edge of the upper sliding surface is closed by a closing member, whereby the part thereof. It is possible to prevent dust and the like from entering the lower sliding surface and the upper sliding surface from the location. This prevents the smooth sliding between the lower sliding surface or the upper sliding surface and the sliding body from being hindered by dust, and ensures the normal operation of the sliding pendulum type seismic isolation device in the event of an earthquake. it can.
Further, since the outer peripheral surface of the closing member is in contact with the peripheral wall surface of the lower sliding surface and the upper sliding surface at least in a part in the circumferential direction, the peripheral end corresponding to the part of the lower sliding surface and 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 edges, and to more reliably maintain the function of the sliding pendulum type seismic isolation device.

In the sliding pendulum type seismic isolation device according to the second invention, in the first invention, the closing member has a contact surface for contacting the sliding body and positioning the sliding body in the horizontal direction, and an earthquake occurs. It is characterized by having flexibility that does not hinder the sliding of the lower support surface and the upper support surface of the sliding body and the lower sliding surface and the upper sliding surface at the time.

According to the second invention, since the closing member does not hinder the sliding of the sliding body at the time of an earthquake, the original function of the sliding pendulum type seismic isolation device can be exhibited without any trouble at the time of an earthquake. Here, the flexibility means the ease of deformation in both the case of plastic deformation and the case of elastic deformation.

On the other hand, in order for the restoration function of the sliding pendulum type seismic isolation device to be performed reliably, 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 placed at the center position, and the upper side is careful not to move the sliding body from that position. It is necessary to arrange the sliding surface.

In this regard, according to the second invention, when the sliding pendulum type seismic isolation device is installed, the closing member is arranged on the lower sliding surface, and the sliding body is further arranged so as to abut on the contact surface of the closing member. 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 horizontally positioned and supported on the lower sliding surface by the closing member, so that the sliding body does not deviate from the support position on the lower sliding surface. Carelessness is not required and the upper sliding surface can be easily placed on the lower sliding surface.

The sliding pendulum type seismic isolation device according to the third invention is characterized in that, in the first or second invention, the closing member is made of sponge rubber.

According to the third invention, since the closing member is made of sponge rubber, the closing member does not prevent the sliding body from sliding between the upper sliding surface and the lower sliding surface in the event of an earthquake. .. Therefore, the function of the sliding pendulum type seismic isolation device can be surely exhibited.

It is sectional drawing which shows the appearance that the sliding pendulum type seismic isolation device which concerns on one Embodiment of this invention is installed between the lower structure and the upper structure. FIG. 2A is a plan view of the concave surface plate constituting the lower sliding surface and the 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 closing member of the sliding pendulum type seismic isolation device of FIG. 5A to 5D are cross-sectional views showing a modified example of the closing member that can be used in the present invention. FIG. 6A is a cross-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 in which the upper structure to which the sliding pendulum type seismic isolation device is applied to the 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, the sliding pendulum type seismic isolation device 1 according to the embodiment of the present invention supports the upper structure 3 on the lower structure 2, and the vibration of the earthquake is from the lower structure 2 to the upper side. It suppresses transmission to the structure 3.

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. The upper member is provided with a sliding body 6 that supports the upper sliding surface 5 on the lower sliding surface 4 in a slidable state.

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 in contact with the lower sliding surface 4 and the upper sliding surface 5 so as to be slidable, 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 separated in the vertical direction with a certain interval.

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 is between the two peripheral edges 7. A disk-shaped closing member 9 having an outer peripheral portion 8 for closing is arranged.

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

FIG. 2A is a plan view of the 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 by, for example, pressing a square stainless steel plate having a thickness of 1 mm and a square shape of about 350 mm, which is obtained by shirring 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 a central portion by the press working, and a peripheral portion 11 thereof. Each of the four sides around the peripheral portion 11 has sink marks 12 produced by the above-mentioned press working.

The lower sliding surface 4 and the upper sliding surface 5 are formed by using a material such as polytetrafluoroethylene having a low coefficient of friction in order to reduce the frictional resistance when the sliding body 6 slides on these surfaces. May be good. Further, it may be formed by using a material in which the static friction resistance and the dynamic friction resistance are significantly different so that the sliding body 6 has a characteristic (trigger characteristic) that the sliding body 6 starts to slide after a relatively large shaking occurs.

Further, a stud bolt 13 provided with a male screw is fixed by CD welding in the vicinity of each corner of the back surface of the peripheral portion 11. 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 embedded in the surface of the lower structure 2 or the upper structure 3 with mortar and attached. 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 portion of the upper sliding surface 5 or the lower sliding surface 4 of the concave plate 10 and the peripheral portion 11, a peripheral wall surface 14 formed by the above press working is formed. 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 thereof, and is connected to the upper surface 15. The sliding surface 5 is connected to the lower surface 16 of the upper structure 3 via the peripheral wall surface 14 that descends 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. The sliding body 6 has, for example, a diameter of about 55 mm and a height of about 45 mm, a plurality of holes 18 are provided in the upper support surface 6b, and a solid lubricant is embedded in each hole 18. The upper support surface 6b has the same radius of curvature as the upper sliding surface 5. The lower support surface 6a of the sliding body 6 has a similar shape.

FIG. 4 is a plan view of the closing member 9. As shown in the figure, a through hole 19 forming a contact surface for positioning the sliding body 6 in the horizontal direction is provided in the central portion 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 hinder the sliding of the sliding body 6 and the lower sliding surface 4 and the upper sliding surface 5 in the event of an earthquake. Will be done. That is, the closing member 9 may be deformed without impairing the function of the sliding pendulum type seismic isolation device 1 and can 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 also be made of a flexible material other than sponge rubber, an elastically deformable material, or the like. However, those that are destroyed when an earthquake occurs and whose fragments interfere with the sliding of the sliding body 6 are excluded.

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

Next, the closing member 9 is arranged on each concave plate 10 of the lower concrete plate, and the sliding body 6 is arranged in the through hole 19. As a result, the sliding body 6 is supported in the horizontal direction by the through hole 19, so that the sliding body 6 is easily positioned with respect to the center of the concave plate 10.

Next, the upper concrete plate is formed 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 concave plate 10 for the corresponding lower sliding surface 4. Place above the lower concrete plate. As a result, the lower concrete plate and the upper concrete plate face each other at intervals of, for example, about 15 mm, and the installation of the sliding pendulum type seismic isolation device 1 is completed.

When an earthquake occurs, a force acting in the direction of horizontal displacement acts between the upper structure 3 and the lower structure 2. As a result, the upper structure 3 and the lower structure 2 sway relatively in a pendulum manner via the sliding body 6 between each lower sliding surface 4 and the corresponding upper sliding surface 5. Due to this pendulum-like swing, the seismic isolation function of the sliding pendulum type seismic isolation device 1 is exhibited.

During this time, the closing member 9 between the lower sliding surface 4 and the upper sliding surface 5 is easily deformed, so that the seismic isolation function is not impaired. When the earthquake subsides, the functions of each lower sliding surface 4, upper sliding surface 5 and sliding body 6 and the action of gravity acting on the upper structure 3 cause each lower sliding surface 4 and the corresponding upper sliding surface 5 And are positioned so that their central axes coincide with each other. As a result, the positional relationship between the upper structure 3 and the lower structure 2 is restored to the state before the earthquake (restoration function).

As described above, according to the present embodiment, the closing member 9 closes between the peripheral edge 7 of the lower sliding surface 4 and the peripheral edge 7 of the upper sliding surface 4. As a result, dust or the like invades the lower sliding surface 4 or the upper sliding surface 5 from between the two peripheral edge 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 from being hindered. Therefore, the seismic isolation function and the restoration function can be maintained for a long period of time so that the sliding pendulum type seismic isolation device 1 operates reliably in the event of an earthquake.

Further, since the closing member 9 has a through hole 19 for supporting the sliding body 6, when the sliding pendulum type seismic isolation device 1 is installed, the closing member 9 is arranged on the lower sliding surface 4 and the through hole is provided. By arranging the sliding body 6 at 19, the sliding body 6 can be easily arranged at the center of the lower sliding surface 4.

Then, when the upper sliding surface 5 is arranged 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. As a result, 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 arranged 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 formed between the lower sliding surface 4 and the peripheral edge 7 of the upper sliding surface 5. Can be effectively prevented from entering the lower sliding surface 4 and the upper sliding surface 5. As a result, the function of the sliding pendulum type seismic isolation device 1 can be reliably maintained for a long period of time.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, the closing member 9 in FIG. 1 has a rectangular cross-sectional shape, but may be a closing member having another cross-sectional shape, for example, a cross-sectional shape as shown in FIGS. 5A to 5D. Each of these closing members has the shape of a rotating body in which each cross-sectional shape is rotated around the central axis AX.

The closing member 9b of 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 extending from the lower sliding surface 4 to the upper sliding surface 5 is provided in the central portion of the closing member 9b to accommodate the sliding body 6 and support it in the horizontal direction.

The closing member 9c of FIG. 5B has a cylindrical member 21 reaching from the lower sliding surface 4 to the upper sliding surface 5 at the center, and a disk-shaped member 22 having a hole in contact with the outer surface of the cylindrical member 21. A sliding body 6 is housed inside the cylindrical member 21 and is supported in the horizontal direction.

The closing member 9d of FIG. 5C has a cross-sectional shape on the lower side similar to that of the closing member 9b of FIG. 5A. 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-shaped member 22 of FIG. 5B are considered to be integrated.

The closing member 9e of FIG. 5D has a cross-sectional shape as if the disk-shaped closing member 9 of FIG. 1 is divided into upper and lower parts, and has a through hole 19c in which the sliding body 6 is arranged at the center. However, the peripheral edge of the closing member 9e is in contact with the peripheral edge of the lower sliding surface 4 and the upper sliding surface 5, and is more effective between the peripheral edge of the lower sliding surface 4 and the peripheral edge of the upper sliding surface 5. Blocks. The closing member 9e may be divided into three or more parts.

Further, as the sliding body arranged 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 of FIG. Good. The sliding body 23 is composed of a columnar main body 24 and disk-shaped sliding members 25 provided on the upper surface and the lower surface of the main body 24, respectively. The surface of the sliding member 25 on the lower surface side constitutes a lower support surface 25a that abuts on the lower sliding surface 4. The surface of the sliding member 25 on the upper surface side constitutes an upper supporting surface 25b that abuts on the upper sliding surface 5.

The main body 24 is made 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 embedding it in recesses formed on the upper surface and the lower surface of the main body 24.

Further, the dimensions and materials of each part such as the thickness and size of the stainless steel plate material constituting the concave surface plate 10, the curvature of the lower sliding surface 4 and the upper sliding surface 5, the diameter and height of the sliding body 6, and the like. 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 frequency and amplitude of the vibration intended for seismic isolation, and the like.

Further, the closing member may be a member that closes between the peripheral edge 7 of the lower sliding surface 4 and the peripheral edge 7 of the upper sliding surface 5 at 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 have a perfect disk shape, and a part of the outer peripheral portion may be omitted.

FIG. 7A shows a state in which the upper structure 3 to 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. The sliding pendulum type seismic isolation device 31 is different from the sliding pendulum type seismic isolation device 1 in FIG. 1 only in the configuration of the closing member, and is the same in other respects.

As shown in FIGS. 7A and 7B, the closing member 9f and the sliding body 6 are arranged between the concave plate 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 abbreviated form.

That is, each closing member 9f has a substantially fan shape, and has a shape such that a through hole for arranging the sliding body 6 is provided at a key portion thereof. Each closing member 9f is formed between the concave plate 10 of each set of the four corners of the lower structure 2 and the upper structure 3 of the peripheral edge 7 (see FIG. 1) of the lower sliding surface 4 and the upper sliding surface 5. It is arranged so as to close the corners of the four corners between them.

In this way, when a plurality of sliding pendulum type seismic isolation devices are installed 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 are installed. By closing only the side facing the periphery with the closing member, it is possible to prevent the 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 it has the above-mentioned function of preventing the intrusion of dust and the function of supporting the sliding body in the horizontal direction. ..

Further, the contact surface for positioning the sliding bodies 6 and 23 in the horizontal direction is such that the contact surface is in contact with the entire circumference of the sliding bodies 6 and 23 like the contact surface composed of the through holes 19, 19b and 19c. Not limited. The contact surface may be in contact with a part around the sliding bodies 6 and 23 as long as the sliding bodies 6 and 23 can be positioned in the horizontal direction.

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 circumference, 9, 9b, 9c, 9d, 9e, 9f ... Closure member, 10 ... Concave plate, 11 ... Peripheral part, 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-shaped member, 24 ... body, 25 ... sliding material.

Claims (3)

A lower member having a partially spherical lower sliding surface in which the center of curvature is located above and fixed to the lower structure,
An upper member having a partially spherical upper sliding surface in which the center of curvature is located below and being fixed to the upper structure,
The lower sliding surface and the upper supporting surface have a lower supporting surface and an upper supporting surface, and the lower supporting surface and the upper supporting surface are slidably in contact with the lower sliding surface and the upper sliding surface, respectively. A sliding pendulum type seismic isolation device provided with a sliding body arranged between the sliding surface and the upper sliding surface.
A closing member that is arranged between the lower sliding surface and the upper sliding surface and closes between the peripheral edge of the lower sliding surface and the peripheral edge of the upper sliding surface at least in a part in the circumferential direction. equipped with a,
The lower sliding surface is connected to the upper surface of the lower structure via a peripheral wall surface rising from the peripheral edge thereof.
The upper sliding surface is connected to the lower surface of the upper structure via a peripheral wall surface that rises from the peripheral edge thereof.
The sliding pendulum type seismic isolation device, wherein the closing member has an outer peripheral surface that is in contact with the peripheral wall surface of the lower sliding surface and the upper sliding surface in at least a part in the circumferential direction. The closing member has an abutting surface for abutting on the sliding body and positioning the sliding body in the horizontal direction, and the lower support surface and the upper support surface of the sliding body at the time of an earthquake and the above. The sliding pendulum type seismic isolation device according to claim 1, further comprising flexibility that does not hinder sliding between the lower sliding surface and the upper sliding surface. The sliding pendulum type seismic isolation device according to claim 1 or 2 , wherein the closing member is made of sponge rubber.