JPH0941712A - Response control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small-sized response control device with long durability and capable of bearing heavy load by spherically contacting respectively between a fist member and a sliding member and between a second member and the sliding member. SOLUTION: When a response control device 3 is displaced, a spherical surface for making up the forms of a first sliding surface 7 of a first member 4 and a first bearing surface 9 of a sliding member 6 brought into contact therewith each other is made. A spherical surface for making up the forms of a second sliding surface 8 of a second member 5 and a second bearing surface 10 of the sliding member 6 is also made. Cylindrical skirt members 11 as lateral displacement control members are mounted to a building 1 so as to surround the first member 4, second member 5 and sliding member 6. Circular elastic members 12 are fixed to the lower ends of the insides of the skirt members 11 and are positioned at a certain interval (g) from the circumference of the second member 5. Rolling vibration acts on the response control device 3, and when the first member 4 is relatively displaced over displacement (g) to the second member 5, the elastic members 12 control the displacement of the first member 4 to lighten the shock in the case of clashing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device which is interposed, for example, between a building and a foundation of the building to protect the building from rolling vibrations such as an earthquake.

[0002]

2. Description of the Related Art Conventionally, a seismic isolation device for protecting a building from rolling vibrations such as an earthquake has been constructed by supporting a building through a rubber or a spring so that the elastic force of the rubber or the spring causes the seismic vibration. Most of them adopted a configuration that absorbs. However, since rubber and spring deteriorate relatively quickly, they are not necessarily suitable as seismic isolation devices used for buildings on the assumption that they will be used for a long time. In addition, supporting a large load is considerably large and has a limit, and a large number of seismic isolation devices are required to disperse and support the large load.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a seismic isolation device having a long service life, a small size, and a large load.

[0004]

In order to achieve the above object, the present invention has the following as a first structure thereof. That is, it is interposed between the lower member and the upper member,
In a seismic isolation device which supports the upper member so as to be relatively displaceable laterally with respect to the lower member, a first member fixed to the upper member, a second member fixed to the lower member, and A sliding member that is interposed between a first member and the second member and that is relatively displaceable laterally with respect to the first member and the second member, There is a spherical contact between one member and the sliding member and between the second member and the sliding member. A preferable mode based on the above configuration is as described in claims 9 to 11 in the claims.

In order to achieve the above object, the present invention has the following second construction. That is, in a seismic isolation device that is interposed between a lower member and an upper member and supports the upper member so as to be relatively displaceable laterally with respect to the lower member, a first member fixed to the upper member. And a second member fixed to the lower member, and interposed between the first member and the second member, and relatively displaceable laterally with respect to the first member and the second member. A first sliding surface having a spherical surface is formed on a lower surface of the first member, and a second sliding surface having a spherical surface is formed on an upper surface of the second member. A moving surface is formed, and the sliding member has a first supporting surface formed of a spherical surface that is complementary to the first sliding surface on the upper surface thereof, and the second sliding surface on the lower surface thereof. A second supporting surface is formed of a spherical surface that is complementary to the first supporting surface, and the first supporting surface is the first sliding surface. Coherent, the second supporting surface is brought into close contact with the second sliding surface, some such as configuration. A preferable mode based on the above configuration is as described in claims 3 to 13 in the claims.

[0006]

According to the invention described in claim 1, since the sliding member is in spherical contact with the first member and the second member, the first member and the sliding member become the second member. On the other hand, it is possible to slide laterally in any direction, and it is possible to effectively provide seismic isolation regardless of the direction in which a rolling vibration such as an earthquake is transmitted.

Further, since the first member and the second member are in spherical contact with the sliding member, respectively, it is possible to obtain a sufficiently large contact area. Can be supported. And since it can be basically constituted by the three elements of the first member, the second member and the sliding member, the constitution is simple and the construction is easy. Further, it is possible to use it virtually semipermanently without causing a problem of fatigue due to long-term use.

According to the invention described in claim 2, the first
The first sliding surface of the member and the first supporting surface of the sliding member that comes into contact therewith form spherical surfaces that are complementary to each other, and the second sliding surface of the second member
Since the sliding surface and the second supporting surface of the sliding member form spherical surfaces that are complementary to each other, these members can be brought into contact with each other with a sufficiently large contact area. Therefore, this seismic isolation device can operate smoothly even when a large load is supported. Then, the same effect as the effect corresponding to claim 1 can be obtained.

By adopting the structure as described in claims 3 to 6, on the premise of the structure of claim 2, a specific uneven shape of each sliding surface and each supporting surface is provided. .

With the structure as described in claim 7, a plurality of sliding members are provided for one first member and the second member, and the first member and the second member are arranged in the lateral direction. It is possible to support a large load with a shape as small as possible while securing relative displacement.

With the structure as described in claim 8, since the sliding member is arranged at the apex position of the triangle, the load of the upper member is surely shared by the sliding members and supported. can do.

By adopting the structure as described in claim 9, it is possible to realize the effects corresponding to claims 1 and 2 sufficiently while implementing at low cost.

With the structure as described in claim 10, it is preferable to automatically and surely return the first member to the original position, that is, the neutral position by the restoring force of the spring member.

According to the eleventh aspect, the damper can attenuate the lateral vibration.

With the structure as described in claim 12, it is preferable to always position the sliding member at a predetermined neutral position by utilizing the load from the upper member.

With the structure as described in claim 13, the displacement regulating member is utilized to regulate the lateral relative displacement of the first member with respect to the second member or more, and the first of the sliding member. While trying to prevent the member and the second member from falling off,
By using the elastic member, it is possible to reduce the impact and the lateral vibration when the lateral relative displacement is restricted.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. In FIG. 1, a building such as a building and a house is indicated by reference numeral 1, and a foundation member on which the building 1 is constructed is indicated by reference numeral 2.
Indicated by The building 1 corresponds to the upper member in the claims, and the base member 2 corresponds to the lower member in the claims. In FIG. 1, a seismic isolation device is indicated by reference numeral 3. The seismic isolation device 3 is provided between the building 1 and the foundation member 2 in an appropriate number. Only the individual is shown.

The seismic isolation device 3 is the first fixed to the building 1.
The member 4, the second member 5 fixed to the base member 2, and the first
Between the member 4 and the second member 5, the first member 4 and the second member 5
Sliding member 6 interposed so as to be relatively displaceable laterally with respect to
And

A first sliding surface 7 consisting of a convex spherical surface is formed on the lower surface of the first member 4, and an upper surface of the second member 5 is formed on the upper surface.
A second sliding surface 8 formed of a convex spherical surface is formed.
On the upper surface of the sliding member 6, a first supporting surface 9 composed of a concave spherical surface which is complementary to the first sliding surface 7 is formed, and on the lower surface of the sliding member 6, a second supporting surface 9 is formed. A second support surface 10 formed of a concave spherical surface that is complementary to the sliding surface 8 is formed. Then, as shown in FIG. 1, the first support surface 9
Is in close contact with the first sliding surface 7, and the second supporting surface 10 is in close contact with the second sliding surface 8. The first sliding surface 7 and the second sliding surface 9 are each set to have a sufficiently larger area than (the respective supporting surfaces 9, 10 of) the sliding member 6.

The spherical centers of the first sliding surface 7 and the first supporting surface 9 share the same spherical center α. The spherical center of the second sliding surface 8 and the second supporting surface 10 have the same spherical center β in common. Then, the center of each spherical surface α
And β are in the vertical direction (vertical direction) through the center of the sliding member 6 when the sliding member 6 is in a predetermined neutral position (center position) with respect to the upper member 4 and the lower member 5. It is set to be located on the same straight line that extends to. This makes it easier for the sliding member 6 to return to the predetermined neutral position when receiving a load from the building 1, and is preferable for ensuring smooth lateral relative displacement.

The first member 4, the second member 5, and the sliding member 6 are each made of an iron-based metallic material. The reason why these members are made of iron-based metallic materials is to increase the service life of the seismic isolation device 3. Therefore, the materials of the first member 4, the second member 5, and the sliding member 6 are not limited to the iron-based metal materials, and various highly rigid materials such as ceramic materials and aluminum alloys may be used. You can Further, even when these members are made of an iron-based metal material, the sliding member 6 is replaced by the other two members 4,
By using an iron-based metal material having a component composition different from that of 5, the sliding property of the sliding member 6 can be increased. At least one of the sliding surfaces 7 and 8 or the supporting surfaces 9 and 10 may be subjected to a coating treatment (surface treatment) for ensuring smooth sliding.

As shown in FIG. 1, the building 1 is provided with a tubular skirt member 11 as a lateral displacement restricting member so as to surround the first member 4, the second member 5 and the sliding member 6. It is installed. An annular elastic member 12 is fixed to the lower end of the inner surface 11a of the skirt member 11,
Are located at a constant distance g from the peripheral surface of the second member 5.
When the rolling vibration acts on the seismic isolation device 3 and the first member 4 is displaced relative to the second member 5 by a displacement amount g or more, the elastic member 12 collides with the peripheral surface of the second member 5. The function of regulating the displacement amount of the first member 4 and mitigating the impact at the time of collision is fulfilled. Of course, by the skirt member 11, the sliding member 6
It is also possible to prevent the falling off from the first member 4 or the second member.

2 and 3 show the displacement of the seismic isolation device 3 subjected to a rolling vibration. In the figure, the diameters of the first member 4 and the second member 5 are 700 mm, and the spherical radii of the first sliding surface 7, the second sliding surface 8, the first supporting surface 9, and the second supporting surface 10 are each 1000 mm. Then, when the first member 4 moves 188 mm to the position of the broken line 4 ', the sliding member 6 tilts 5 degrees from the central axis, and the first member 4 descends 8 mm.

When the seismic isolation device 3 is displaced as shown in FIG. 2 and FIG. 3, the first sliding surface 7 of the first member 4 and the first supporting surface 9 of the sliding member 6 contacting the first sliding surface 7 are in contact with each other. A complementary spherical surface is formed, and the second sliding surface 8 of the second member 5 and the sliding member 6 are formed.
Since the second supporting surface 10 of (1) also forms spherical surfaces which are complementary to each other, these members 4, 5, 6 are in contact with each other with a sufficiently large contact area. Therefore, this seismic isolation device 3
Can operate smoothly even when bearing a large load.

FIG. 4 shows a second embodiment of the present invention, in which the same components as those of the above-mentioned embodiment are designated by the same reference numerals and their duplicate description will be omitted (this will be described in yet another embodiment below). The same about). In this embodiment, the first sliding surface 7 and the second supporting surface 10 are convex spherical surfaces,
The sliding surface 8 and the first support surface 9 are formed by concave spherical surfaces.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, the first sliding surface 7 and the second sliding surface 8 are formed by concave spherical surfaces, and the first supporting surface 9 and the second supporting surface 10 are formed.
And are composed of convex spherical surfaces.

6 and 7 show a fourth embodiment of the present invention. In this embodiment, a plurality of (three in the embodiment) first sliding surfaces 14 independent of each other are formed on the first member 13, and the second member 15 corresponds to the first sliding surfaces 14, respectively. A plurality of (three in the embodiment) second independent of each other
A sliding surface 16 is formed. A sliding member 17 is interposed between the corresponding first sliding surface 14 and second sliding surface 16 (the number of sliding members 17 is three in the embodiment). According to the seismic isolation device having such a configuration, since the bearing area of the load is increased, it becomes possible to operate smoothly even when a large load is applied. In the embodiment, 3
Each individual sliding member 17 (each sliding surface 14, 16) is
It is arranged so as to be located at the apex of a regular triangle, more specifically a regular triangle, so that the load of the building 1 is applied to the sliding member 17 substantially evenly.

8 and 9 show a fifth embodiment of the present invention. In this embodiment, the first member 4 and the second member 5 are hemispherical, and a spring member 18 for applying a restoring force to the first member 4 is provided between the first member 4 and the base member 2. A damper 19 that gives a cushioning force to the first member 4 when the first member 4 moves.
It is through the and. The elastic force of the spring member 18 urges the first member 4 so as to always return to the original position (neutral position), and when the first member 4 receives lateral vibration, the damper 19
The damping effect is obtained.

Although the embodiment has been described above, the present invention is not limited to this and includes, for example, the following cases. (1) Contrary to FIG. 4, the first sliding surface 7 and the second supporting surface 10 may be concave, and the second sliding surface 8 and the first supporting surface 9 may be convex. (2) The lower member may be a lower floor member in a building, and the upper member may be an upper floor member located slightly above the lower floor member (the upper floor member has a floating structure. , A structure for protecting a precision product such as a computer from lateral vibration when the precision product such as a computer is disposed on the upper floor member). (3) The upper and lower outer peripheral edge portions of the sliding member 6 may be formed so as to be separated from the corresponding sliding surface 7 or 8 (as chamfered or facing the outer peripheral direction of the sliding member 6). Formation of an inclined surface that is gradually separated from the sliding surface 7 or 8). By doing so, it becomes preferable in order to ensure smooth movement when the sliding member 6 is displaced relative to the first member 3 and the second member 4 (prevention of galling).

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of a seismic isolation device of the present invention.

FIG. 2 is a plan view showing displacement of a first member of the seismic isolation device of FIG.

FIG. 3 is a side view showing a displacement of the seismic isolation device of FIG. 1.

FIG. 4 is a vertical cross-sectional view of a second embodiment of the seismic isolation device of the present invention.

FIG. 5 is a vertical cross-sectional view of a third embodiment of the seismic isolation device of the present invention.

FIG. 6 is a plan view of a fourth embodiment of the seismic isolation device of the present invention.

7 is a cross-sectional view of the seismic isolation device taken along the line AA of FIG.

FIG. 8 is a side view of a fifth embodiment of the seismic isolation device of the present invention.

9 is a plan view of the first member of the embodiment of FIG.

[Explanation of symbols]

 1: Building (upper member) 2: Foundation member (lower member) 3: Seismic isolation device 4: First member 5: Second member 6: Sliding member 7: First sliding surface 8: Second sliding Surface 9: 1st support surface 10: 2nd support surface 11: Displacement regulation member 12: Elastic member 13: 1st member 14: 1st sliding surface 15: 2nd member 16: 2nd sliding surface 17: Sliding Element

Claims (13)

[Claims] 1. A seismic isolation device which is interposed between a lower member and an upper member, and which supports the upper member so as to be relatively displaceable laterally with respect to the lower member, and is fixed to the upper member. A first member, a second member fixed to the lower member, a second member interposed between the first member and the second member, and laterally with respect to the first member and the second member. And a sliding member interposed so as to be relatively displaceable, and a spherical contact is made between the first member and the sliding member and between the second member and the sliding member. Seismic isolation device characterized by being 2. A seismic isolation device which is interposed between a lower member and an upper member and which supports the upper member so as to be relatively displaceable laterally with respect to the lower member, and is fixed to the upper member. A first member, a second member fixed to the lower member, a second member interposed between the first member and the second member, and laterally with respect to the first member and the second member. A first sliding surface formed of a spherical surface is formed on a lower surface of the first member, and a spherical surface is formed on an upper surface of the second member. A second sliding surface is formed, and the sliding member has a first supporting surface formed of a spherical surface that is complementary to the first sliding surface on the upper surface thereof and the second supporting surface on the lower surface thereof. A second supporting surface is formed of a spherical surface that is complementary to the sliding surface, and the first supporting surface is the first supporting surface. A seismic isolation device, wherein the seismic isolation device is in close contact with a sliding surface, and the second supporting surface is in close contact with the second sliding surface. 3. The spherical surface of claim 2, wherein the first sliding surface and the second sliding surface are convex spherical surfaces, and the first supporting surface and the second supporting surface are concave spherical surfaces. The seismic isolation device is characterized by being composed of. 4. The spherical surface of claim 2, wherein the first sliding surface and the second supporting surface are convex spherical surfaces, and the second sliding surface and the first supporting surface are concave spherical surfaces. The seismic isolation device is characterized by being composed of. 5. The second sliding surface according to claim 2, wherein the first sliding surface and the second sliding surface are concave spherical surfaces, and the first supporting surface and the second supporting surface are convex spherical surfaces. The seismic isolation device is characterized by being composed of. 6. The surface of claim 2, wherein the first sliding surface and the second supporting surface are concave spherical surfaces, and the second sliding surface and the first supporting surface are convex spherical surfaces. The seismic isolation device is characterized by being composed of. 7. The second sliding surface according to claim 2, wherein the first sliding surface is formed on the first member independently of each other, and the second sliding surface is formed on the second sliding member. A plurality of them are formed independently of each other so as to correspond to the respective surfaces, and between the corresponding first sliding surface and second sliding surface,
A seismic isolation device characterized in that each of the sliding members is interposed. 8. The number of the first sliding surface, the second sliding surface, and the number of the sliding members are each three, and the first sliding surface, the second sliding surface, and the sliding member are each included. The seismic isolation device characterized in that the moving member is arranged so as to be located at the apex of the triangle. 9. The seismic isolation device according to claim 1 or 2, wherein the first member, the second member, and the sliding member are each formed of an iron-based metal. . 10. The spring member according to claim 1, wherein a spring member is provided between the first member and the lower member for applying a restoring force to the first member toward a predetermined neutral position. A seismic isolation device characterized by being interposed. 11. The seismic isolation device according to claim 10, further comprising a damper interposed between the first member and the lower member. 12. The spherical surface center of the first sliding surface and the first supporting surface are coincident with each other at a first center point according to any one of claims 2 to 8, The spherical centers of the surface and the second support surface are respectively aligned at the second center points, and when the sliding member is at a predetermined neutral position in the lateral direction, on the vertical center line passing through the center of the sliding member, The seismic isolation device, wherein the first center point and the second center point are located. 13. The displacement restricting member according to claim 1, wherein a displacement restricting member is provided on one of the upper member and the lower member so as to surround the sliding member. When the upper member is laterally displaced relative to the lower member by a predetermined amount or more, the displacement regulating member abuts on the other member of the upper member and the lower member, and the lateral displacement of the predetermined amount or more. It is set so as to regulate the direction relative displacement, at the contact portion between the displacement regulating member and the member on the other side,
A seismic isolation device characterized in that an elastic member is provided.