JP2012021638A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device which does not operate at imperceptible vibration but operates when vibration exceeds a certain earthquake intensity especially when an earthquake occurs.SOLUTION: A plurality of base isolation bodies, each of which includes a spherical or disk-like sliding member between an upper member having a curved concave surface and a lower member having a curved concave surface opposite to the upper member, are interposed between a lower side substrate mounted on a floor surface and an upper side substrate supporting a structure. A resisting means, which suppresses initial horizontal movement of the upper side substrate with respect to the lower side substrate, is arranged so that when horizontally acting force becomes equal to or more than predetermined force, the upper side substrate relatively moves with respect to the lower side substrate. The resisting means is formed of a connection member for connecting the lower side substrate to the upper side substrate. When the horizontal force equal to or more than the predetermined force acts on the connection member, the connection member is sheared, and the upper side substrate relatively moves with respect to the lower side substrate.

Description

    The present invention relates to a seismic isolation device, and more particularly to a seismic isolation device that is configured to operate beyond a certain seismic intensity without being operated by slight vibration when an earthquake occurs.

  Conventionally, various seismic isolation devices have been developed, but most of them have a seismic isolation effect of springs and rubber, sliding method at the lower end, and rolling of the sphere for electronic devices on buildings and floors. There are many methods. For example, Japanese Patent Application Laid-Open No. 2007-24123 and Japanese Patent No. 3058364 have been developed.

  Japanese Patent Laid-Open No. 2007-24123   Japanese Patent No. 3058364

  In the conventional seismic isolation unit consisting of the sliding method of the lower end and the rolling method of the sphere, the structure of the electronic device or the like that works even with slight vibrations and supports even with the slight movement of the rolls continues to swing, Moreover, the resilience of the seismic isolation unit to limit the continuation of the swing was poor.

  The seismic isolation device of the present invention is a seismic isolation device that supports vertical impacts, supports rolling in all directions, can regulate the extreme state during rolling, and can be stably supported at three fulcrums. It is a seismic isolation device that can be attached to the bottom surface of a frame or the like, and is configured to operate beyond a certain seismic intensity without being operated by a slight vibration.

  More specifically, a seismic isolation body provided with a spherical or disk-shaped sliding member between an upper member having a curved concave surface and a lower member having a curved concave surface facing the upper member is placed on the floor surface. A plurality of resistors are interposed between the side substrate and the upper substrate supporting the structure, and resistance means for suppressing the initial horizontal movement of the upper substrate with respect to the lower substrate is provided, and the force acting in the horizontal direction is predetermined. In this case, the upper substrate moves relative to the lower substrate, and the resistance means includes a connecting member that connects the lower substrate to the upper substrate. When the force is applied, the connecting member is sheared and the upper substrate moves relative to the lower substrate, and the curvature of the curved concave surface of the upper member or the lower member of the base isolation body The contact area should be the same as the curvature of the sliding member. Having a resistance means due to comb friction, and when the horizontal force greater than a predetermined value is greater than the friction force, the upper substrate moves relative to the lower substrate, and When the upper member and the lower member both have protrusions protruding inward at the periphery, and the sliding member slides between the upper member and the lower member, the upper member and the lower member The protrusions on the periphery and the protrusions on the periphery of the lower member engage with the recesses formed on the sides of the sliding member, so that the horizontal direction of the upper member relative to the lower member is increased. It is configured to restrict movement and generate a restoring force by the weight of the supporting structure, and the seismic isolation body between the upper substrate and the lower substrate is arranged at the apex of the triangle in plan view To provide a seismic isolation device characterized by the above.

  Various types of sliding members are interposed between the three upper members having the curved concave surface portions fixed to the upper substrate and the three lower members having the curved concave surface portions fixed to the lower substrate. The seismic isolation body is formed so that one or more seismic isolation units can be attached to the bottom surface of the housing, and the connecting member is inserted in the side part between the upper board and the lower board. The upper and lower structures of various types of sliding members in which the structure of the sliding member is a sphere or integrally formed are formed with various cones, and a space is formed between the various cones above and below the sliding member. The upper member stopper portion and the lower member stopper portion respectively lock the edges of the rolling members to restrict and support the sliding of the upper member and the lower member during the sliding limit operation. Between the upper and lower cones of the sliding member. A sliding member formed between the curved concave surface portion of the upper member and the curved concave surface portion of the lower member, characterized in that a space is formed and elasticity between the upper and lower various cones is given. Consists of a cylindrical part that connects the pyramids up and down, and is integrally formed of metal, plastic, POM or ceramics, and between the curved concave part of the upper member and the curved concave part of the lower member The sliding member interposed between the two has a core made of metal, plastic, POM or ceramics at the top and bottom of the central part, the peripheral part is made of hard rubber or the like, and the cone is integrally formed at the top and bottom. The sliding member interposed between the curved concave surface portion of the upper member and the curved concave surface portion of the lower member has a core made of metal, plastic, POM, or ceramic inserted through the central portion. The peripheral part is made of hard rubber etc. The upper and lower cones are integrally formed, and a sliding member interposed between the curved concave surface portion of the upper member and the curved concave surface portion of the lower member is inserted from above and below the central portion. Characterized in that it has a core made of metal, plastic, POM or ceramics, the core is fixed with hard rubber or the like, and cones are integrally formed on the top and bottom, and the upper member is curved The sliding member interposed between the concave surface portion and the curved concave surface portion of the lower member has a sphere made of metal, plastic, POM, or ceramics at the center, and the peripheral portion is made of hard rubber or the like and is vertically A seismic isolation device characterized in that a cone is integrally formed.

  The seismic isolation device of the present invention can attach a plurality of seismic isolation bodies that can be stably supported at three fulcrums to the bottom surface of a housing or the like, and when a sliding member having a space is used, the space of the sliding member The vertical impact is absorbed by the elastic action of the part, and in the limit of rolling, the stopper part of the upper member and the stopper part of the lower member are respectively in various cones of the sliding member during the extreme operation of the sliding member. The edge portions of the upper member and the lower member are regulated by locking the edge portions of the member, and the position of the sliding member is restored by the load of the housing.

  In addition, due to the action of the connecting member inserted in the side part between the upper substrate and the lower substrate, the seismic isolation body did not operate in the slight earthquake until it was damaged by the roll, the seismic intensity increased and the connecting member was damaged Since it is comprised so that a seismic isolation body may operate | move from the time, the seismic isolation apparatus of this invention will not operate | move continuously by a slight earthquake.

  In addition, the curvature of the slidable member of the sphere and the part of the curvature part of the sphere are provided in the lower member, and the slidable member of the sphere is partially fitted. The seismic isolation device of the present invention does not continuously operate due to slight earthquakes because the seismic isolation body is configured to operate with a large.

It is a top view of this invention seismic isolation apparatus. It is the sectional view on the AA line of FIG. It is sectional drawing of the state to which the upper board | substrate moved. It is the top view which attached the seismic isolation body to the housing. It is the partial front view which attached the seismic isolation body to the housing. It is sectional drawing of the seismic isolation body which shows another Example. It is sectional drawing of the seismic isolation body which shows another Example. It is sectional drawing of the seismic isolation body which shows another Example. It is a top view of the sliding member which shows another Example. FIG. 10 is a side view of FIG. 9. It is sectional drawing of FIG. It is a top view of the sliding member which shows another Example. It is sectional drawing of FIG. It is sectional drawing of the sliding member which shows another Example. It is sectional drawing of the sliding member which shows another Example. FIG. 16 is a plan view of FIG. 15. It is sectional drawing with the substantially same curvature of the partial curvature of a spherical body and a curved concave surface.

Hereinafter, the seismic isolation device of the present invention will be specifically described with reference to the drawings.
In the drawings, FIG. 1 is a plan view of the seismic isolation body of the present invention. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view showing a state in which the upper substrate has moved. FIG. 4 is a plan view of the seismic isolation body attached to the housing. FIG. 5 is a partial front view of the seismic isolation body attached to the housing. FIG. 6 is a cross-sectional view of a seismic isolation body showing another embodiment. FIG. 7 is a cross-sectional view of a seismic isolation body showing another embodiment. FIG. 8 is a cross-sectional view of a seismic isolation body showing another embodiment. FIG. 9 is a plan view of a sliding member showing another embodiment. FIG. 10 is a side view of FIG. FIG. 11 is a cross-sectional view of FIG. FIG. 12 is a plan view of a sliding member showing another embodiment. 13 is a cross-sectional view of FIG. FIG. 14 is a sectional view of a sliding member showing another embodiment. FIG. 15 is a sectional view of a sliding member showing another embodiment. FIG. 16 is a plan view of FIG. FIG. 17 is a cross-sectional view in which the sphere and the curved concave surface have substantially the same partial curvature.

  Specifically, as shown in FIGS. 1 to 3, a spherical shape is formed between the upper members 2 and 3 having the curved concave surfaces 21 and 31 and the lower members 5 and 6 having the curved concave surfaces 51 and 61 opposed to the upper members 2 and 3. Alternatively, a plurality of seismic isolation bodies 100 provided with disk-shaped sliding members 7 and 8 are interposed between the lower substrate 10 placed on the floor and the upper substrate 11 supporting the structure, and the lower side Resistive means for suppressing the initial movement of the upper substrate 1 in the horizontal direction relative to the substrate 10 is provided, and the upper substrate 1 moves relative to the lower substrate 10 when the force acting in the horizontal direction exceeds a predetermined value. And the resistance means includes a connecting member 101 that connects the lower substrate 10 to the upper substrate 1, and when a predetermined horizontal force is applied to the connecting member 101, the connecting member 101 is sheared, The upper substrate 1 is in phase with the lower substrate 10. The curvature of the curved concave surfaces 51 and 61 of the upper members 2 and 3 or the lower members 5 and 6 of the base isolation body 100 is the curvature of the spherical sliding member 7 as shown in FIG. It is substantially the same as 500, and has a resistance means by friction with a larger contact area, and when the horizontal force greater than a predetermined value becomes larger than the friction force, the upper substrate 1 moves relative to the lower substrate 10. As shown in FIGS. 6 to 8, the upper member 20 and the lower member 50 of the seismic isolation body 100 have protrusions 201 and 501 that protrude inward at the periphery. When the sliding member 70 slides between the upper member 20 and the lower member 50, the protrusion 201 on the peripheral edge of the upper member 20 and the protrusion on the peripheral edge of the lower member 50. The shaped portion 501 is formed of the sliding member 70. By engaging with a gap portion 702 formed in the portion, the horizontal movement of the upper member 20 relative to the lower member 50 is restricted, and a restoring force is generated by the weight of the supporting structure. In addition, the base isolation device 100 between the upper substrate 1 and the lower substrate 10 is disposed at the apex of the triangle 202 in plan view.

  There are various types of sliding between the three upper members 2 having the curved concave surfaces 21 fixed to the upper substrate 1 and the three lower members 5 having the curved concave surfaces 51 fixed to the lower substrate 10. The member 7 is interposed to form the seismic isolation body 100, and one or a plurality of seismic isolation bodies 100 are configured to be attachable to the bottom surface of the housing 200. In the case shown in FIGS. 6 to 8, the connecting member 101 is inserted, and in the case shown in FIG. 6 to FIG. 701, and a space portion 702 is formed between the various cones 701 above and below the sliding member, and the stopper portion 201 of the upper member 20 and the stopper portion 501 of the lower member 50 during the sliding limit operation. And the edge of the sliding member 70 The sliding of the member 20 and the lower member 50 is regulated, and a restoring force is generated by the weight of the supporting housing 200. A space portion 702 is formed between the upper and lower various cones 701 of the sliding member 70. 9 to 11, the sliding member 80 has a core 81 made of metal, plastic, POM, or ceramics above and below the central portion. And the periphery is made of hard rubber or the like, and the pyramids are integrally formed in the upper and lower sides. In the case shown in FIGS. 12 to 13, the sliding member 90 is It is a seismic isolation device characterized by comprising a cylindrical core 902 for connecting convex bodies to each other and integrally formed of metal, plastic, POM or ceramics. The sliding member 90 shown in FIG. 14 has upper and lower convex bodies supported by an elastic member such as hard rubber.

  15 to 16, the sphere 72 is held at the center of the sliding member 700, and the sphere and the marble shape are integrally formed.

  As shown in FIGS. 6 to 8, the upper and lower structures of the sliding member 70 are formed by various cones 701, and a space 702 is formed between the edge portions of the various cones 701 above and below the sliding member 70. In addition, elasticity between the edge portions is given.

  When rolling vibration is applied, the sliding member 70 slides as shown in FIG. 7 from the normal position of FIG. 6 as shown in FIGS. 6 to 8, and then the sliding limit operation as shown in FIG. At that time, the stopper portion 201 of the upper member 20 and the stopper portion 501 of the lower member 50 respectively lock the edge portions of the sliding member 70 to restrict further sliding of the upper member 20 and the lower member 50. It is configured to be.

  In the state of FIG. 8 described above, the action of returning the sliding member 70 to the original normal state is given by the weight of the casing 200.

  In the sliding member 80 shown in FIGS. 9 to 11, the upper and lower structures are each formed of various cones 801 as in the sliding member 70 shown in FIGS. 6 to 8. As shown in FIG. 11, a core 81 is integrally embedded.

  The material of the core 81 is made of metal, plastic, POM, or ceramics, and the peripheral portion is made of hard rubber or the like.

  In the sliding member 90 shown in FIGS. 12 to 13, a cylindrical core 902 is inserted through the center of the sliding member 90. In the sliding member 90 shown in FIG. 14, a hard rubber 904 or the like is provided between the upper and lower convex bodies 901. Are attached, and a cylindrical core 902 is embedded in the hard rubber 904 and the like from above and below.

  Also, the structure of the sliding member 700 shown in FIGS. 15 to 16 is such that a steel rolling sphere 72 is housed in the center of a variety of cones 71 made of upper and lower hard rubber or the like.

  The upper and lower various cones of any of the above-mentioned sliding members are formed via a gap, and elasticity is imparted between the upper and lower various cones.

  Further, the sliding member 90 has a metallic cylindrical core 902 in the center, and the convex portion formed integrally with the peripheral edge and the upper and lower sides of the cylindrical core 902 is made of hard rubber or the like. In any case, the limit state of the slide can be regulated between the stopper portion 201 of the upper member 20 and the stopper portion 501 of the lower member 50.

  The connecting member 101 is inserted in the side part between the upper substrate 1 and the lower substrate 10, and the seismic isolation body 100 does not swing by the fine vibration until the connecting member 101 is damaged by a constant vibration. The seismic isolation body 100 is configured to operate when the connecting member 101 is damaged.

  In addition, as shown in FIG. 17, the lower member 5 is provided with a partial curvature portion 500 that is substantially the same as the curvature of the spherical sliding member 7, and the spherical sliding member 7 is partially fitted so that it does not roll. In the case of a slight earthquake, the seismic isolation body does not operate, and the seismic intensity is increased so that the seismic isolation body 100 operates. Therefore, the seismic isolation device of the present invention does not continuously operate due to the slight earthquake.

DESCRIPTION OF SYMBOLS 1 Upper substrate 10 Lower substrate 100 Seismic isolation body 101 Connecting member 2 Upper member 20 Upper member 21 Curved concave surface 200 Housing 201 Stopper part 202 Triangular view 210 Curved concave surface 3 Upper member 31 Curved concave surface 4 Upper member 5 Lower member 50 Lower member 500 Substantially the same partial curvature portion 501 Stopper portion 510 Curved concave surface 51 Curved concave surface 6 Lower member 61 Curved concave surface 7 Sliding member 71 Various cones 72 Rolling sphere 73 Gap portion 8 Sliding member 81 Core 9 Sliding member 70 Sliding member 700 Sliding member 701 Various cones 702 Cavity 80 Sliding member 801 Various cones 802 Cavity 90 Sliding member 901 Convex body 902 Cylindrical core 903 Cavity 904 Hard rubber, etc.

Claims (5)

A lower substrate and a structure in which a seismic isolation body provided with a spherical or disk-like sliding member between an upper member having a curved concave surface and a lower member having a curved concave surface facing the upper member is placed on the floor surface Are interposed between the upper substrate that supports
A resistance unit that suppresses an initial horizontal movement of the upper substrate with respect to the lower substrate is provided, and the upper substrate moves relative to the lower substrate when a force acting in the horizontal direction exceeds a predetermined value. Seismic isolation device.   The resistance means includes a connecting member that connects the lower substrate to the upper substrate. When a predetermined horizontal force is applied to the connecting member, the connecting member is sheared, and the upper substrate is moved to the lower substrate. The seismic isolation device according to claim 1, wherein the seismic isolation device moves relative to the substrate.   The curvature of the curved concave surface of the upper member or the lower member of the seismic isolation body is the same as the curvature of the sliding member, the contact area is increased, and there is a resistance means by friction. The seismic isolation device according to claim 1, wherein the upper substrate moves relative to the lower substrate when it becomes larger. Each of the upper member and the lower member of the seismic isolation body has a protruding portion protruding inward at the periphery,
When the sliding member slides between the upper member and the lower member, the protruding portion on the peripheral edge of the upper member and the protruding portion on the peripheral portion of the lower member are By engaging with a recess formed in the side of the moving member, the horizontal movement of the upper member relative to the lower member is restricted, and a restoring force is generated by the weight of the supporting structure. The seismic isolation device according to claim 1.   The seismic isolation device according to claim 4, wherein the seismic isolation body between the upper substrate and the lower substrate is arranged at a vertex of a triangle in plan view.

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