JP6354133B2 - Seismic isolation support device - Google Patents

Description

  The present invention relates to a seismic isolation support device of a rolling / sliding pendulum type.

  In order to provide seismic isolation support for fixtures such as display stands, bookcases, etc., a sliding seismic isolation support device using a sliding plate or a sliding surface, a rolling seismic isolation support device using a rolling member, or the like is used.

JP 2003-120748 A JP 2006-283958 A JP 2010-84910 A

  By the way, the slip-isolation support device and the rolling seismic isolation support device do not have a restoring force to return to the original position, and after vibration, there is a return work to manually return the furniture, the bookshelf, etc. to the original position. Necessary.

  For example, the pendulum type seismic isolation devices described in Patent Documents 1 and 2 have been proposed as the seismic isolation support device having a restoring function for generating a restoring force. Is excellent in seismic isolation due to the use of rolling, but it is difficult to obtain a damping function that preferably attenuates vibration.

  On the other hand, Patent Document 3 proposes a pendulum-type seismic isolation device using a steel rod damper to obtain a damping function in addition to the restoration function. In such a seismic isolation device, a steel rod damper is provided. As a result, it is necessary to fix one end of the steel rod damper, so that the installation work becomes large, and as the displacement increases, the effect of absorbing seismic energy decreases and an effective damping function can be obtained. Have difficulty.

  The present invention has been made in view of the above points, and its purpose is to provide an effective damping function in addition to the restoration function, and to provide seismic isolation support for fixtures such as display stands and bookcases. An object of the present invention is to provide a seismic isolation support device that can easily perform seismic isolation of an object and can easily increase the period of vibration.

  The seismic isolation support device of the present invention installed between the ground or base and the base isolation support object has an upper part and a lower part in order to support the base isolation support object on the ground or base. And a rotatable member that is rotatably arranged between the base-isolated support object and the ground or base, and the upper part is slidably in contact with the concave bottom surface of the cross-section arc provided on the base-isolated support object It has a cross-section arc-shaped convex upper surface having the same radius of curvature as that of the bottom surface of the arc-shaped concave concave section, and the lower portion is configured to freely contact the surface of the ground or the base. And the cross-section arc convex bottom surface having the same or different curvature radius as that of the cross-section arc convex top surface, and in a stationary state, the center of curvature of the cross-section arc convex top surface is the cross-section arc convex bottom surface Eccentric to the lower surface of the convex arc in the vertical direction with respect to the center of curvature To have.

  According to the seismic isolation support device of the present invention, the upper portion of the rotatable member has a cross-section arc convex upper surface that slidably contacts the cross-section arc concave bottom surface and has the same radius of curvature as that of the cross-section arc concave bottom surface. The lower part of the rotatable member has a cross-sectional arc having a curvature radius that is the same as or different from the curvature radius of the convex upper surface of the cross-section arc and is configured to freely contact the surface of the ground or base. As a result of having a convex lower surface, the center of curvature of the convex upper surface of the cross-sectional arc is decentered toward the lower surface of the convex arc of the cross-section in the vertical direction with respect to the center of curvature of the convex bottom surface of the cross-sectional arc. In addition to the function of restoring the mold, it is possible to obtain an effective damping function by the frictional resistance caused by the sliding of the upper surface of the circular arc of the cross section with respect to the lower surface of the circular arc of the cross section. Seismic isolation with just installation The seismic isolation of the object to be held can be easily performed, and the rotation period of the rotatable member, that is, the oscillation period depends on the amount of eccentricity. Periodization can be achieved.

  In the present invention, the seismic isolation support object to be supported includes furniture such as a display stand such as a store, a book shelf such as an office, a library or a general house, office equipment, a factory machine and a machine bed. , Hospital examinations, diagnostic equipment, small warehouses, etc., but the present invention is not limited to these, and the base is a foundation floor built in the ground, a store, an office, a library, etc. Or the floor of a structure such as a general house, a hospital, a warehouse, etc. can be mentioned, but the present invention is not limited to these, and the cross-section arc concave bottom surface in the present invention is a constituent member of the seismic isolation support object itself. For example, when the seismic isolation support object is a display stand of a store or the like, it may be formed on the bottom plate of the display base, and thus provided directly on the seismic isolation support object. Attached to the seismic isolation support object When the material, for example, the seismic isolation support object is a display stand such as a store, the reinforcing member or the attachment member attached to the bottom plate of the display stand (hereinafter referred to as a load receiving member in the present invention) In this way, it may be provided indirectly on the seismic isolation support object.

  In the present invention, the cross-section arc concave bottom surface and the cross-section arc convex top surface may be part of a spherical surface or part of a cylindrical surface. If the convex bottom surface of the circular arc is also made of a part of a spherical surface, it can exert a seismic isolation effect against vibrations in all directions on the horizontal plane. The direction can be given to the effect, and when the direction of the seismic isolation effect is given in this way, the cross-section arc concave bottom surface, the cross-section arc convex top surface, and the cross-section arc convex bottom surface are all configured from a part of the cylindrical surface. There is no need, and any of them may be constituted by a part of the cylindrical surface.

  Moreover, the cross-section arc convex lower surface in the present invention may be formed of a part of a spherical surface or a cylindrical surface, and when it is formed of a part of a spherical surface, as described above, If the convex upper surface of the circular arc is also made of a part of a spherical surface, it can exhibit a seismic isolation effect against vibrations in all directions on the horizontal plane. Can be given directionality.

  In a preferred example of the present invention, the cross-section arc convex bottom surface has the same radius of curvature as the cross-section arc concave bottom surface, i.e., the cross-section arc convex top surface, but instead has a different radius of curvature. You may have.

  In the present invention, the upper part may consist of a semi-spherical part or a semi-cylindrical part, the lower part may also consist of a semi-spherical part or a semi-cylindrical part, and the surface of the ground or base has a curvature. It may consist of a curved convex surface with a large radius or a truncated conical surface with a very small bevel, but preferably a substantially horizontal flat surface, and the lower part of the ground or base is stationary. It may have a flat surface that is in contact with the horizontal flat surface of the surface and is surrounded by a convex lower surface of the cross-section arc. In this case, the lower part is composed of a sphere defined by the sphere, and the cross-section arc The convex lower surface is composed of a spherical surface of the spherical band portion, and the lower flat surface may be composed of the small-diameter end surface of the spherical band portion surrounded by the spherical surface of the spherical band portion. The lower part has a pair of arcuate convex surfaces and a flat surface sandwiched between the pair of arcuate convex surfaces. On the other hand, the lower surface of the circular arc is formed by a pair of circular convex surfaces of the semi-cylindrical portion, and the lower flat surface is formed from the flat surface of the semi-cylindrical portion sandwiched between the pair of circular convex surfaces. It may be.

  The surface of the ground or base has a horizontal flat surface, and the lower part is stationary (the seismic isolation support object to be supported does not vibrate relative to the ground or base in the horizontal direction. In the state where the seismic isolation function is not exerted), if there is a flat surface that comes into contact with the horizontal flat surface of the ground or the base, the horizontal flat surface of the ground or the base Contact with the flat surface is maintained, and trigger function (function that does not cause rolling on the ground or base surface of the convex bottom surface of the circular arc in cross section when vibration acceleration is below a certain level, and causes rolling when vibration acceleration is above a certain level) It can be obtained effectively and avoids unnecessary and sensitive seismic isolation.

  In the present invention, preferably, the arc-shaped convex lower surface is formed so that the friction coefficient with respect to the surface of the ground or the base, particularly the horizontal flat surface, is larger than the friction coefficient of the cross-sectional arc convex upper surface with respect to the cross-sectional arc concave lower surface. Has been.

  In a preferred example of the present invention, the upper portion includes an upper body made of a rigid metal or a hard resin, and a coating layer that is attached to the upper body and has a cross-sectional arc-shaped upper surface, and a lower portion. Also, the lower main body is covered with a rigid lower body by thermal spraying of metal or ceramics on the lower main body or by vulcanization adhesion or sticking of an elastic body made of natural rubber, synthetic rubber or elastic synthetic resin material. And a coating layer having a convex arc bottom surface in cross section, and the upper coating layer is made of metal or ceramic on the upper body so that a damping function can be obtained by appropriate frictional resistance. It may be applied to the upper body by thermal spraying such as natural rubber, synthetic rubber or synthetic resin material, preferably hard body, in some cases vulcanization adhesion or sticking of elastic body, At least one of the cross-section arc convex top surface and the cross-section arc convex bottom surface is textured so that sliding can be secured on the concave bottom surface and rolling on the surface of the ground or base. May be.

  If at least one of the upper and lower coating layers is made of an elastic body that can be elastically deformed, it can absorb vibrations in the vertical direction of the ground or base, which may be preferable. If is made of an elastic body that can be elastically deformed, a trigger function can be effectively obtained by elastic deformation of the coating layer in a stationary state.

  In the present invention, preferably, in a stationary state, the center of curvature of the convex upper surface of the cross-section arc and the center of curvature of the convex bottom surface of the cross-section arc are located on the same vertical line.

  The seismic isolation support device of the present invention prohibits rotation of the rotatable member against the seismic isolation support object or the ground or the base from the seismic isolation support object by prohibiting the rotation of the rotatable member due to the collision of the rotatable member. A detachment preventing mechanism for preventing the detachment of the universal member may be further provided. In this case, the detachment prevention mechanism includes an enclosure that is attached to the seismic isolation support object and surrounds the rotatable member. The surrounding body may be configured to come into contact with the rotatable member in the rotation of the rotatable member more than a certain amount with respect to the seismic isolation support object or the ground or the base.

  In a seismic isolation support device equipped with a detachment prevention mechanism, even if the rotatable member is greatly rotated due to an unintended earthquake with a large acceleration or the like, the rotation of the rotatable member is prohibited by prohibiting it from rotating beyond a certain level. As a result of preventing the separation of the rotatable member from the seismic support object, it is possible to prevent the seismic isolation support object from falling, and to minimize damage caused by vibration such as a large earthquake.

  According to the present invention, in addition to the restoration function, it is possible to obtain an effective attenuation function, and it is possible to easily perform seismic isolation of seismic isolation support objects such as furniture such as display stands, bookcases, Moreover, it is possible to provide a seismic isolation support device that can easily increase the period of vibration.

FIG. 1 is an explanatory side sectional view of an example of a preferred embodiment according to the present invention. 2 is a cross-sectional explanatory view taken along the line II-II in the example shown in FIG. FIG. 3 is a perspective explanatory view of the rotatable member of the example shown in FIG. FIG. 4 is an operation explanatory diagram of the example shown in FIG. FIG. 5 is an explanatory side sectional view of another example of the preferred embodiment according to the present invention. FIG. 6 is an operation explanatory diagram of the example shown in FIG. FIG. 7 is a side cross-sectional explanatory view of still another example of a preferred embodiment according to the present invention. FIG. 8 is a side cross-sectional explanatory view of still another example of a preferred embodiment according to the present invention. FIG. 9 is a perspective explanatory view of another example of the rotatable member in the present invention. FIG. 10 is a perspective explanatory view of still another example of the rotatable member in the present invention.

  Next, the present invention will be described in more detail based on an example of a preferred embodiment shown in the drawings. The present invention is not limited to these examples.

  1 to 3, a recess 5 defined by an arc-shaped concave bottom surface 4 is flattened in the horizontal direction H on the lower surface 3 of the outer box of a fixture 2 such as a display stand such as a store as a seismic isolation support object. A disc-shaped load receiving member 7 provided on the lower surface 6 extending in the direction is provided by a screw or the like, and the seismic isolation support device 1 of this example is disposed in the recess 5 of the load receiving member 7. An upper part 8 and a lower part 11 in contact with a surface (floor surface) 10 consisting of a horizontal flat surface extending flat in the horizontal direction H of a floor 9 of a building as a base fixed on a foundation installed on the ground. And a rotatable member 12 rotatably disposed in the direction R between the fixture 2 and the floor 9 via the load receiving member 7, and the rotation in the direction R of the rotatable member 12 with respect to the fixture 2. The load receiving member 7 is prevented by prohibiting rotation in the direction R beyond a certain level due to the collision of the member 12. It has and a detachment prevention mechanism 13 for preventing disengagement of the rotatable member 12 from fixtures 2.

  The load receiving member 7 is made of rigid metal, hard resin, or the like, and the cross-section arc-shaped concave lower surface 4 is made of a part of a spherical surface, and the recess 5 is made of a part of a sphere, that is, a half It is formed in a spherical shape.

  In addition to the upper part 8 and the lower part 11, the rotatable member 12 is arranged between the upper part 8 and the lower part 11, and has a rigid disc-shaped intermediate part 21 made of a rigid metal or a hard resin. 11 and is formed integrally with.

  The upper part 8 made of a semi-spherical part is integrally formed on the circular upper surface of the intermediate part 21 with its circular large diameter surface, and is a rigid semi-spherical upper body made of a rigid metal or a hard resin. 22 and thermal spraying of metal or ceramics on the semispherical convex surface 22a of the upper main body 22, or preferably a hard body made of natural rubber, synthetic rubber, synthetic resin material, etc. The upper body 22 includes a covering layer 24 that is attached to the semispherical convex surface 22a of the upper body 22 and has an arc-shaped convex upper surface 23, and is formed of a part of a spherical surface and has a center of curvature O1. The cross-section arc convex upper surface 23 is slidably in surface contact with the cross-section arc concave bottom surface 4 with a friction coefficient μ1 in the direction R, and has the same radius of curvature r1 as the curvature radius r1 of the cross-section arc concave bottom surface 4.

  The lower portion 11 made of a semispherical portion is formed integrally with the circular lower surface of the intermediate portion 21 and has a rigid semispherical lower body 32 made of a rigid metal or a hard resin, and the lower body 32. The semicircular convex surface 32a is thermally sprayed with metal or ceramics, or vulcanized or bonded with an elastic body made of natural rubber, synthetic rubber, or a synthetic resin material having elasticity. And a covering layer 34 having an arcuate lower surface 33 having a cross-sectional arc, and a lower surface 33 having an arcuate cross-sectional surface 33 formed of a part of a spherical surface and having a center of curvature O2. The surface 10 has a radius of curvature r2 that is the same as the radius of curvature r1 of the arcuate concave bottom surface 4 and has a coefficient of friction μ2 with respect to the surface 10 of the floor 9 and has a concave arcuate bottom surface. Section larger than the friction coefficient .mu.1 arc convex upper face 23 (μ2> μ1) so as to have been formed against.

  In the stationary state, the center of curvature O1 of the arcuate convex upper surface 23 is eccentric with the amount of eccentricity δ on the side of the arcuate lower surface 33 in the vertical direction V with respect to the center of curvature O2 of the arcuate lower surface 33. The distance from the vertex 41 of the arcuate convex upper surface 23 to the vertex 42 of the arcuate convex lower surface 33, that is, the height h of the rotatable member 12 in the stationary state is r1 + r2−δ, The centers O1 and O2 and the vertex 42 are located on the same vertical line 43 in a stationary state.

  The separation preventing mechanism 13 includes a surrounding body 51 that is integrally attached to the fixture 2 via the load receiving member 7 and surrounds the rotatable member 12, and the surrounding body 51 is a load receiving member. A cylindrical portion 52 that is integrally attached to the lower surface 6 of the ring 7, and a flange portion 55 that is integrally attached to the lower end of the cylindrical portion 52 and that defines a through-hole 54 on an annular inner peripheral surface 53. The lower part 11 passes through the through-hole 54 and is point-contacted to the surface 10 of the floor 9 so as to roll freely in the direction R at the arcuate lower surface 33 in cross section. In the rotation of the rotatable member 12 through the load receiving member 7 in the direction R more than a certain direction with respect to the fixture 2, as shown in FIG. 4, by the collision of the arc-shaped convex lower surface 33 with the inner peripheral end 56 of the flange portion 55. The rotation of the rotatable member 12 in the direction R beyond a certain level is prohibited. It has become way.

  A plurality of seismic isolation support devices are arranged on the lower surface 3 of the outer box of the fixture 2 so that the fixture 2 does not tilt with respect to the horizontal direction H, that is, the lower surface 3 extends in the horizontal direction H. 1, when vibration in the horizontal direction H due to the earthquake is not applied to the floor 9, it is in a stationary state shown in FIG. On the other hand, the load of the fixture 2 on the floor 9 is leveled without tilting the fixture 2 on the floor 9 via the rotatable member 12 in contact with the surface 10 of the floor 9 at the vertex 42 of the arc-shaped convex lower surface 33. When the vibration in one direction is applied to the floor 9 in the horizontal direction H due to the earthquake, the rotatable member 12 of each seismic isolation support device 1 generates a rotational moment in one direction in the direction R. Thus, each seismic isolation support device 1 can rotate freely. As shown in FIG. 4, the material 12 has one rotational force in the direction R of the cross-section arc convex upper surface 23 with respect to the cross-section arc concave bottom surface 4 based on the difference between the friction coefficient μ 2 and the friction coefficient μ 1 (μ 2> μ 1). With the sliding in the direction, the surface 9 of the floor 9 rotates and rolls in one direction in the direction R on the arcuate lower surface 33 in section, and each seismic isolation support device 1 is moved to the floor 9 by this rolling rotation. The transmission of the applied vibration in the horizontal direction H to the fixture 2 is prevented, and thus the fixture 2 is isolated and supported, while the convex upper surface of the cross-section arc caused by the eccentricity δ between the curvature center O1 and the curvature center O2 The rotatable member 12 configured to lift the fixture 2 in the vertical direction V along with the rotation in one direction of the direction R due to the difference between the curvature radius r1 of 23 and the curvature radius r2 of the convex bottom surface 33 of the cross-section arc. Still state at each rotation position Is generated based on the amount of eccentricity δ, and the rotating member 12 rotates on the surface 10 of the floor 9 by rotating in the reverse direction in the direction R on the arcuate lower surface 33 in the cross section. A rotatable member 12 that performs a so-called pendulum motion with a fixed period by a rotational moment based on vibrations in both directions in the horizontal direction H caused by an earthquake and a return moment based on an eccentricity δ is a floor 9 in the horizontal direction H caused by an earthquake. After the vibration disappears, sliding friction with the friction coefficient μ1 of the arcuate concave lower surface 4 against the arcuate upper surface 23 and rolling friction at the arcuate lower surface 33 of the rotatable member 12 against the surface 10 of the floor 9 occurs. Along with the convergence of the pendulum motion due to the dissipation of vibration energy, it is returned to the rotational position in the stationary state shown in FIG. 1, and the fixture 2 is returned to the original position before vibration. It has become the jar.

  In the above seismic isolation support device 1 installed between the floor 9 and the fixture 2 in order to support the isolation of the fixture 2 on the floor 9, the upper portion 8 has a friction coefficient μ1 on the entire surface of the concave bottom surface 4 in the direction R. And has a cross-section arc convex upper surface 23 having the same radius of curvature r1 as the radius of curvature r1 of the cross-section arc concave bottom surface 4, and the lower portion 11 is directed to the surface 10 of the floor 9 in the direction R. It has a cross-section arc convex bottom surface 33 that is in contact with the rolling surface and has a curvature radius r2 that is the same as the curvature radius r1 of the cross-section arc concave bottom surface 4, and in a stationary state, the center of curvature O1 of the cross-section arc convex top surface 23. Is decentered by the eccentric amount δ toward the cross-section arc convex bottom surface 33 in the vertical direction V with respect to the center of curvature O2 of the cross-section arc convex bottom surface 33. As a result, in addition to the pendulum type restoration function, the cross-section arc concave bottom surface 4 Sectional arc convex upper surface 2 with respect to In addition to being able to obtain an effective damping function with frictional resistance caused by frictional sliding having a friction coefficient μ1 of 3, not only the installation of the arc-shaped concave bottom surface 4 through the load receiving member 7 to the fixture 2, but also flooring 9 can be used as it is, so that the seismic isolation of the fixture 2 can be easily performed, and the vibration can be easily prolonged by simply setting the amount of eccentricity δ as appropriate. Then, since the cross-section arc concave bottom surface 4, the cross-section arc convex top surface 23, and the cross-section arc convex bottom surface 33 are part of a spherical surface, all directions in the horizontal direction H, that is, all directions in the horizontal plane are obtained. It is possible to support the fixture 2 with seismic isolation against earthquake vibration.

  According to the seismic isolation support device 1 including the separation preventing mechanism 13, even if the rotatable member 12 is largely rotated in the direction R due to unintended large horizontal H vibrations, the rotatable member 12 can rotate more than a certain amount. As a result of prohibiting and preventing the rotatable member 12 from detaching from the fixture 2 via the load receiving member 7, the fixture 2 can be prevented from falling, and damage caused by an earthquake can be minimized.

  In addition, in the detachment prevention mechanism 13 having the surrounding body 51, the seismic isolation support device 1 is in a stationary state because the flange portion 55 is close to the surface 10 of the floor 9 in the stationary state of the seismic isolation support device 1. The inside 57 of the enclosure 51 can be semi-sealed with respect to the outside 58, dust can be prevented from entering the inside 57 from the outside 58, and malfunction of the seismic isolation support device 1 due to dust can be avoided. In order to make the seismic isolation support device 1 stand still, the floor 9 is secured after the contact of the cross-section arc convex lower surface 33 or the flat surface 61 (see FIG. 5) with the surface 10 of the floor 9 is secured. The surrounding body 51 may be formed with a flange portion 55 that is lightly in contact with the surface 10 of the substrate.

  By the way, in the seismic isolation support device 1 shown in FIG. 1, the lower part 11 is formed from a semicircular spherical part, but instead of this, as shown in FIG. 5, it is formed from a spherical part defined by a spherical band. In addition, the lower portion 11 formed of the spherical band portion shown in FIG. 5 is formed in a stationary state in addition to the arcuate convex lower surface 33 having a radius of curvature r2 and a center of curvature O2 formed of the spherical surface of the spherical band portion. 2 further includes a flat surface 61 that is in contact with the entire surface 10 of the floor 9 and is composed of a small-diameter end face 64 of a spherical zone surrounded by the cross-section arc-shaped convex bottom face 33. The flat surface 61 is formed of an exposed surface of the coating layer 34 that is integrally formed on the lower surface of the intermediate portion 21 and is attached to the rigid spherical belt-like lower main body 32 made of a rigid metal or a hard resin. Such a covering layer 34 is formed of a ball band portion of the lower main body 32. A spherical belt-like layer 63 attached to the spherical convex surface 62 and a circular end face layer 65 attached to the small-diameter end surface 64 of the spherical belt portion of the lower main body 32 are provided. The arc-shaped convex lower surface 33 having a friction coefficient μ2 is from the exposed surface of the ball-shaped layer 63, and the flat surface 61 having the friction coefficient μ2 with respect to the surface 10 of the floor 9 is the exposed surface of the end face layer 65. Respectively.

  Each of the seismic isolation support devices 1 formed in the same manner as FIG. 1 with the lower part 11 shown in FIG. 5 is in a stationary state shown in FIG. 5 when the vibration in the horizontal direction H due to the earthquake is not applied to the floor 9. The entire surface of the arcuate concave lower surface 4 is in contact with the entire surface of the arcuate concave upper surface 23 with a friction coefficient μ1, while the entire surface of the flat surface 61 is in contact with the surface 10 of the floor 9 with a friction coefficient μ2 (μ2> μ1). The load of the fixture 2 is shared and supported on the floor 9 via the rotatable member 12 so that the fixture 2 is horizontal without tilting, and a rotational moment that rotates the rotatable member 12 in the direction R is generated. The horizontal direction H caused by an earthquake with a small acceleration so as not to cause the relative sliding in the horizontal direction H between the flat surface 61 and the surface 10 of the floor 9 which are not caused to occur in the rotatable member 12 and contact with the friction coefficient μ 2. Swing When movement is applied to the floor 9, each rotatable member 12 of the seismic isolation support device 1 does not rotate in the direction R and is based on contact with the friction coefficient μ 2 between the flat surface 61 and the surface 10 of the floor 9. Thus, the vibration in the horizontal direction H of the floor 9 is transmitted to the fixture 2 via the load receiving member 7, while the acceleration of the degree that causes the rotating member 12 to generate a rotational moment that rotates the rotatable member 12 in the direction R. When a vibration in one direction of the horizontal direction H due to a large earthquake is applied to the floor 9, each of the rotatable members 12 of the seismic isolation support device 1 is in one direction in the direction R as shown in FIG. The contact of the flat surface 61 with the surface 10 of the floor 9 is released by the rotation, and the surface 10 of the floor 9 is brought into contact with the lower surface 33 having a circular arc cross section. In this contact, the difference between the friction coefficient μ2 and the friction coefficient μ1 (μ2> Based on μ1) In the direction R of the arcuate convex upper surface 23 to be rotated, the surface 9 of the floor 9 rotates and rolls in one direction in the direction R on the arcuate lower surface 33 of the cross section on the surface 10 of the floor 9. Thus, each seismic isolation support device 1 prevents the horizontal vibration H applied to the floor 9 from being transmitted to the fixture 2 and thus supports the fixture 2 in isolation, while the curvature center O1 and the curvature center O2 Due to the difference between the curvature radius r1 of the arcuate convex upper surface 23 and the radius of curvature r2 of the arcuate convex lower surface 33 due to the eccentricity δ, the fixture 2 is lifted in the vertical direction V along with the rotation of one direction in the direction R. In the rotatable member 12 configured as described above, a return moment to a stationary state at each rotation position is generated based on the amount of eccentricity δ, so that the rotatable member 12 of each seismic isolation support device 1 is flat. Surface 61 and floor 9 The vibration in the other direction of the horizontal direction H due to an earthquake with a large acceleration that restores the contact with the surface 10 with the friction coefficient μ2 and causes the rotatable member 12 to generate a rotational moment in the other direction in the direction R. When joined subsequently to the floor 9, the rotatable member 12 rolls on the surface 10 of the floor 9 on the surface 10 of the floor 9 in the direction R opposite to that described above and rolls on the convex bottom surface 33. Each of the devices 1 repeats the above operation until the vibration in the horizontal direction H that causes a rotational moment in the direction R on the rotatable member 12 disappears, and at the rotational position in the stationary state shown in FIG. 5 along with the disappearance of the vibration. After returning, the fixture 2 is returned to the original position before vibration.

  In the seismic isolation support device 1 shown in FIG. 5, in addition to the effect of the seismic isolation support device 1 shown in FIG. 1, a trigger function based on the flat surface 61 can be effectively obtained. In the case of an earthquake having a small acceleration that does not damage the article, the fixture 2 can be stably supported without causing the floor 2 to swing in the horizontal direction H on the floor 9.

  In the seismic isolation support device 1 shown in FIG. 5, the rotatable member 12 includes a flat surface 61 having a friction coefficient μ2 between the flat surface 61 and the surface 10 of the floor 9. 23, which has a friction coefficient μ3 (μ3> μ1) larger than the friction coefficient μ1 of 23, in other words, including a case where the coefficient of friction is larger than the friction coefficient μ2, and is flat in an earthquake having the maximum predicted acceleration. 61 may be formed so as to have a friction coefficient μ3 that does not slide relative to the surface 10 of the floor 9 in the horizontal direction H. In this case, the end face layer 65 is formed as a spherical belt-like layer 63. You may form with the material different from the material to do.

  In the rotatable member 12 shown in FIGS. 1 and 5, the cross-section arc convex lower surface 33 of the lower portion 11 is the curvature radius of each of the cross-section arc concave lower surface 4 of the load receiving member 7 and the cross-section arc convex upper surface 23 of the upper portion 8. Although it has the same curvature radius r2 as r1, as shown in FIG. 7, the cross-section arc convex bottom surface 33 of the lower part 11 has a cross-section arc concave bottom surface 4 of the load receiving member 7 and a cross-section arc convex shape of the top 8 The upper surface 23 may have a radius of curvature r2 that is larger than the respective radius of curvature r1. Also, as shown in FIG. It may have a radius of curvature r2 smaller than the radius of curvature r1 of the cross-section arc convex upper surface 23 of the lower surface 4 and the upper portion 8, and the cross-section arc concave lower surface 4 and the cross-section arc convex as shown in FIGS. Radius of curvature r2 different from the radius of curvature r1 of the upper surface 23 Even seismic isolation support device 1 with a rotatable member 12 having a circular arc cross sectional convex lower surface 33 which has, operates similarly to the seismic isolation support device 1 shown in FIGS. 1 and 5.

  Further, in the above rotatable member 12, the upper part 8 and the lower part 11 are formed from a semi-spherical part and the intermediate part 21 is formed in a disk shape, respectively, but instead, as shown in FIG. The lower part 11 may be formed from a semi-cylindrical part, and the intermediate part 21 may be formed in a rectangular parallelepiped shape. In the rotatable member 12 having the upper part 8 and the lower part 11 made of such a semi-cylindrical part, the cross-section arc concave bottom surface 4 is a part of a cylindrical surface, that is, a cross-section arc convex upper surface 23 that is slidably contacted in the direction R and a cross-section arc convex lower surface 33 that is slidably contacted with the surface 10 of the floor 9 in the horizontal direction H. Corresponding to this, the load receiving member 7 is preferably formed such that the cross-section arc concave bottom surface 4 is a part of the cylindrical surface, that is, the semicylindrical surface.

  As shown in FIG. 9, the upper part 8 and the lower part 11 are respectively formed from a semi-cylindrical part, the covering layers 24 and 34 are formed in a semi-cylindrical shape, and the exposed surface of the cross-section arc concave bottom surface 4 and the covering layers 24 and 34 are formed. The seismic isolation support device 1 including the rotatable member 12 in which each of the cross-section arc convex upper surface 23 and the cross-section arc convex lower surface 33 is a semicylindrical surface is provided via the load receiving member 7 in the same manner as in FIG. By being installed between the fixture 2 and the surface 10 of the floor 9, the seismic isolation support device 1 shown in FIG. 1 operates in the same manner. The seismic isolation effect can be obtained only in one direction, and the direction can be given to the seismic isolation effect.

  As shown in FIG. 10, the lower portion 11 formed of a semi-cylindrical portion shown in FIG. 9 is in contact with the surface 10 of the floor 9 in a stationary state and is a rectangular flat surface 71 sandwiched between a pair of arcuate lower surfaces 33 in section. The lower portion 11 shown in FIG. 10 includes a pair of arc convex surfaces 72 and a semi-cylindrical portion having a flat surface 71 sandwiched between the pair of arc convex surfaces 72, and the lower portion shown in FIG. 11, the cross-section arc-convex lower surface 33 is composed of a pair of arc-convex surfaces 72 of a semi-cylindrical portion, and the covering layer 34 is a rectangular sandwiched between a pair of cylindrical covering layers 73 and a pair of covering layers 73. Each of the pair of arcuate convex surfaces 72 is an exposed surface of each of the pair of covering layers 73, and the flat surface 71 is an exposed surface of the covering layer 74. And is provided with a rotatable member 12 having such a lower portion 11. The support device 1 is installed between the fixture 2 and the surface 10 of the floor 9 via the load receiving member 7 in the same manner as described above, so that in one direction in the horizontal plane due to the occurrence of an earthquake, FIG. Friction resistance due to sliding in the direction R having the friction coefficient μ1 of the arcuate convex upper surface 23 with respect to the arcuate concave lower surface 4 in addition to the pendulum type restoring function In addition to providing an effective damping function, the surface 10 of the floor 9 can be used as it is in addition to the installation of the arcuate concave bottom surface 4 through the load receiving member 7 to the fixture 2, so The seismic effect can be easily performed, and the vibration can be easily extended by simply setting the amount of eccentricity δ. In addition, the seismic isolation effect can be obtained only in one direction in the horizontal plane Can give direction to the seismic isolation effect. That.

  In the rotatable member 12 of the seismic isolation support device 1 described above, the cross-section arc convex upper surface 23, the cross-section arc convex bottom surface 33, the flat surface 61 and the flat surface 71 are formed from the exposed surfaces of the coating layer 24 and the coating layer 34. However, the present invention is not limited to this, and at least one of the coating layer 24 and the coating layer 34 is not provided, and the cross-section arc convex upper surface 23, the cross-section arc convex bottom surface 33, the flat surface 61, and the flat surface At least one of the surfaces 71 may be formed from the outer surface of the upper body 22 itself or the lower body 32 itself. In this case, the upper body 22 and the lower body 22 are arranged so that the friction coefficient μ2 is larger than the friction coefficient μ1. A material for forming the main body 32 may be appropriately selected.

  In the seismic isolation support device 1 described above, the arc-shaped concave lower surface 4 is provided on the load receiving member 7. Alternatively, it may be formed on the lower surface 3 of the outer box of the fixture 2 and provided on the fixture 2 itself. .

DESCRIPTION OF SYMBOLS 1 Seismic isolation support device 2 Fixture 3 Lower surface 4 Cross-section circular arc concave lower surface 5 Recess 6 Lower surface 7 Load receiving member 8 Upper part 9 Floor 10 Surface 11 Lower part 12 Rotating member 13 Detachment prevention mechanism

Claims (22)

A seismic isolation support device installed between the ground or the base and the base isolation support object in order to support the base isolation support object on the ground or base, and has an upper part and a lower part. It has a rotatable member that is rotatably arranged between the base-isolated support object and the ground or the base, and the upper part is slidably in contact with the concave bottom surface of the cross-sectional arc provided on the base-isolated support object Therefore, it has a cross-section arc convex upper surface having the same radius of curvature as the curvature radius of the cross-section arc concave bottom surface, and the lower portion is configured to freely contact the surface of the ground or the base and roll It has a cross-section arc convex bottom surface with the same or different radius of curvature of the arc-shaped convex top surface, and in a stationary state, the center of curvature of the cross-section arc convex top surface is the center of curvature of the cross-section arc convex bottom surface Is decentered toward the bottom side of the convex arc in the vertical direction Cage, bottom, seismic isolation support device has been surrounded by the circular arc cross sectional convex lower surface or sandwiched flat surface while in contact with the horizontal planar surface of the ground or base surface at rest. The lower part consists of a ball part defined by the ball band, the cross-section arc convex lower surface consists of the ball part of the ball part, and the lower flat surface is the ball part surface of the ball part. The seismic isolation support device according to claim 1, comprising a small-diameter end face of the enclosed ball belt portion. The lower part is composed of a semi-cylindrical portion having a pair of arc convex surfaces and a flat surface sandwiched between the pair of arc convex surfaces, and the cross-section arc convex lower surface is composed of a pair of arc convex surfaces of the semi-cylindrical portion, The seismic isolation support device according to claim 1, wherein the lower flat surface is a flat surface of a semi-cylindrical portion sandwiched between a pair of arcuate convex surfaces. The cross-section arc convex bottom surface is formed so that the friction coefficient with respect to the surface of the ground or base is larger than the friction coefficient of the cross-section arc convex top surface with respect to the cross-section arc concave bottom surface. The seismic isolation support device described in 1. Detachment prevention that prevents the detachment of the rotatable member from the seismic isolation support object by prohibiting the rotation of the rotatable member against the seismic isolation support object or the ground or base by prohibiting the rotation of the rotatable member beyond a certain level due to the collision of the rotatable member. The seismic isolation support device according to any one of claims 1 to 4, further comprising a mechanism. The detachment prevention mechanism includes an enclosure that is attached to the seismic isolation support object and surrounds the rotatable member. The enclosure has a certain level relative to the seismic isolation support object or the ground or base. The seismic isolation support device according to claim 5, wherein the seismic isolation support device comes into contact with the rotatable member when the rotatable member rotates.   A seismic isolation support device installed between the ground or the base and the base isolation support object in order to support the base isolation support object on the ground or base, and has an upper part and a lower part. It has a rotatable member that is rotatably arranged between the base-isolated support object and the ground or the base, and the upper part is slidably in contact with the concave bottom surface of the cross-sectional arc provided on the base-isolated support object Therefore, it has a cross-section arc convex upper surface having the same radius of curvature as the curvature radius of the cross-section arc concave bottom surface, and the lower portion is configured to freely contact the surface of the ground or the base and roll It has a cross-section arc convex bottom surface with the same or different radius of curvature of the arc-shaped convex top surface, and in a stationary state, the center of curvature of the cross-section arc convex top surface is the center of curvature of the cross-section arc convex bottom surface Is decentered toward the bottom side of the convex arc in the vertical direction Cage, circular cross section convex lower surface, seismic isolation support device of friction coefficient with respect to the ground or base surface is formed to be larger than the friction coefficient of the circular arc cross sectional convex upper face to its section arc concave lower surface.   Detachment prevention that prevents the detachment of the rotatable member from the seismic isolation support object by prohibiting the rotation of the rotatable member against the seismic isolation support object or the ground or base by prohibiting the rotation of the rotatable member beyond a certain level due to the collision of the rotatable member. The seismic isolation support device according to claim 7, further comprising a mechanism.   A seismic isolation support device installed between the ground or the base and the base isolation support object in order to support the base isolation support object on the ground or base, and has an upper part and a lower part. A rotation member that is rotatably arranged between the base-isolated support object and the ground or the base, and the rotation of the rotary member with respect to the base-isolated support object, the ground, or the base exceeds a certain level due to the collision of the rotary member. And an anti-separation mechanism that prevents the rotatable member from detaching from the seismic isolation support object, and the upper part is a circular arc concave bottom surface provided on the seismic isolation support object. The upper surface of the circular arc has a convex upper surface with the same radius of curvature as that of the lower surface of the concave arc of the cross section, and the lower portion is slidably in contact with the surface of the ground or base. And the curvature of the convex upper surface of the cross-section arc And has a cross-section arc convex bottom surface having the same or different curvature radius as the radius, and in a stationary state, the center of curvature of the cross-section arc convex top surface is perpendicular to the center of curvature of the cross-section arc convex bottom surface Seismic isolation support device that is eccentric to the bottom surface of the convex arc.   The detachment prevention mechanism includes an enclosure that is attached to the seismic isolation support object and surrounds the rotatable member. The enclosure has a certain level relative to the seismic isolation support object or the ground or base. 10. The seismic isolation support device according to claim 8 or 9, wherein the seismic isolation support device comes into contact with the rotatable member when the rotatable member rotates.   The seismic isolation support device according to any one of claims 7 to 10, wherein the lower portion is formed of a semi-spherical portion or a semi-cylindrical portion.   The seismic isolation support device according to any one of claims 1 to 11, wherein the upper surface of the convex arcuate section is formed of a part of a spherical surface.   The seismic isolation support device according to any one of claims 1 to 11, wherein the convex upper surface of the cross-sectional arc is a part of a cylindrical surface.   The seismic isolation support device according to any one of claims 1 to 13, wherein the arcuate lower surface of the cross-section is a part of a spherical surface.   The seismic isolation support device according to any one of claims 1 to 13, wherein the arcuate lower surface of the cross-section is a part of a cylindrical surface.   The seismic isolation supporting device according to any one of claims 1 to 15, wherein the cross-section arc convex bottom surface has the same radius of curvature as that of the cross-section arc convex top surface.   The seismic isolation support device according to any one of claims 1 to 15, wherein the cross-section arc convex bottom surface has a curvature radius different from the curvature radius of the cross-section arc convex top surface.   The seismic isolation support device according to any one of claims 1 to 17, wherein the upper portion is formed of a semicircular spherical portion or a semicylindrical portion.   The seismic isolation according to any one of claims 1 to 18, wherein the upper part comprises a rigid upper body and a covering layer attached to the upper body and having a convex cross-section upper surface. Support device.   20. The base isolation device according to any one of claims 1 to 19, wherein the lower portion includes a rigid lower main body and a covering layer that is attached to the lower main body and has a lower surface having a convex arcuate cross section. Support device.   21. The seismic isolation support device according to any one of claims 1 to 20, wherein at least one of the cross-section arc convex upper surface and the cross-section arc convex bottom surface is textured.   The base-isolated support device according to any one of claims 1 to 21, wherein the center of curvature of the convex upper surface of the circular arc and the center of curvature of the convex lower surface of the circular arc are located on the same vertical line in a stationary state. .

Images