JP2011099310A - Base isolation support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a base isolation support device which makes seismic balls drop between upper and lower rolling plates (sliding members) and roll only at the occurrence of earthquake motion for preventing oscillation of a light structure and the like due to wind or the like at a usual time by performing surface friction at a usual time without existence of the seismic balls between the upper and lower rolling plates, and preventing a rolling base isolation defect due to scattering of the seismic balls caused by the earthquake motion by always arranging a plurality of the seismic balls freely on the lower rolling plate. <P>SOLUTION: An upper sliding and rolling plate 4 is abutted onto a sliding support column mechanism unit D equipped with a horizontal bottom surface 9 with no load by the seismic balls 7, formed by fixing a plurality of cylindrical lower support columns 8, having the same height as the seismic balls 7 whose height is set equal to that of the lower rolling plate 2 surface, onto a lower support board 5 at intervals allowing the seismic balls 7 to freely roll, and the seismic balls 7 and sand grains 16 for excessive rolling prevention are dropped between the upper sliding and rolling plate 4 and the lower rolling plate 2 through a seismic ball mixed body dropping hole 15 from a seismic ball mixed body supply tank 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a seismic isolation device for light structures and the like, and more particularly, the seismic isolation device is a bearing using a plurality of seismic isolation balls having a sliding bearing function, and is provided with an upper base. By storing a mixture of a plurality of seismic isolation spheres and over-rolling control sand particles in a sphere mixture supply tank and using the seismic force to supply the mixture between the upper and lower rolling plates , While the sand granule suppresses over-rolling of the seismic isolation ball, avoids the inability to segregate rolling due to the absence of the seismic isolation ball, and the seismic isolation ball exists between the upper sliding and rolling plate and the lower support column in normal times By doing so, there is no rolling isolation between the two, the frictional resistance between them supports the load of light structures, etc., and the light structures, etc. are prevented from swinging due to external forces such as wind during normal times. This is related to a seismic isolation bearing device using a plurality of seismic isolation balls.

As seismic isolation bearing devices used for light structures, etc., seismic isolation ball bearings can be broadly classified into single-ball bearings and multi-sphere bearings. Single ball bearings are easier to constrain than single balls, but support the load locally, and there is a concern that seismic isolation balls and rolling plates may be damaged. Although it is not easy to restrain the whole ball as compared with the single ball type, it has the advantage of supporting the load at multiple points.

In addition, the conventional base-isolated ball bearings are not differentiated between single-ball bearings and multi-ball bearings, and the upper part of the base-isolated ball is always loaded with a light structure or other load. Many seismic isolation devices use the seismic isolation technology that provides seismic isolation function. Therefore, the seismic isolation ball can easily roll in normal times, and has the difficulty that light structures and the like easily swing due to an external force such as wind.

2. Description of the Related Art Conventional seismic isolation devices using monocytes are known. (For example, refer to Patent Document 1).

The above-described seismic isolation support device of Patent Document 1 includes a cradle having a recess, a ball that rolls on the recess, a housing that is supported on the cradle via the ball and to which the seismic isolation structure is attached, and one end. Is provided with a U-shaped metal plate whose other end is fixed to the housing.

It is said that the force that deflects the U-shaped metal plate during earthquake motion suppresses the displacement of the relative position between the cradle and the housing, and is also used as the suppression force of the seismic isolation structure due to external forces such as typhoons. .

However, during normal times, between the cradle and the housing, there is a ball that rolls easily when the seismic isolation structure is loaded on the ball that has started rolling. The spring force is not applied directly to the ball, but indirectly to the seismic isolation structure that is moved by the rolling of the ball, but the weight of the seismic isolation structure varies individually, It is not easy to prevent the ball from rolling by adjusting the spring force of the U-shaped metal plate to resist external forces such as typhoons, corresponding to all seismically isolated structures with different Conceivable. If a large spring restraining force that can prevent the swinging of all seismically isolated structures is added to a certain percentage, it may be possible that efficient rolling isolation is not possible.

A conventional multi-ball seismic isolation device is known. (For example, refer to Patent Document 2).

The above-described seismic isolation device of Patent Document 2 enables free rolling of a plurality of spheres in a sphere holding frame that restricts movement of the sphere in the horizontal direction between the sliding plate of the support member and the base. It is spread and comprises return means for returning the relative position of the support member and the base to the initial position.

However, in normal times, there is a sphere that rolls easily when a structure is loaded on a sphere that is in a rolling start state between the base and the sliding plate. Rocks. The return spring force is not applied directly to the sphere, but is indirectly applied to the structure that is moved by the rolling of the sphere, but the weight of the structure differs individually, and all structures that have different weights. Corresponding to each, it is considered that it is not easy to prevent the sphere from rolling by adjusting the return spring force to resist external force such as typhoon.

In addition, during the earthquake motion, multiple spheres under the sliding plate roll and perform rolling isolation. However, the displacement direction of the ground during earthquake motion is various, and is not necessarily limited to the displacement in the horizontal direction. It can be assumed that the ground is displaced in the vertical direction, the diagonally vertical direction, or the horizontal direction and the vertical direction simultaneously.

Therefore, since the spheres laid in a freely rollable manner on the base are not constrained, they may be unevenly distributed or rolled in all directions and scattered outside the base due to short-period earthquake motion. Therefore, it can be assumed that a sphere does not exist under the sliding plate, and it is possible that rolling isolation is impossible.

2. Description of the Related Art A conventional seismic isolation device with a multi-ball friction material storage tank is known. (For example, refer to Patent Document 3).

The above-mentioned seismic isolation bearing device with a friction material storage tank in Patent Document 3 rolls a single friction ball over the entire inner bottom portion of the friction material storage tank, and on the rolling friction ball at the center of the friction material storage tank. The sliding column surface of the seismic isolation sliding support column that is upright is placed on a rolling friction ball, and a predetermined amount of rolling friction ball is stored.

However, in normal times, between the inner bottom of the friction material storage tank and the sliding column surface, a structure is loaded on the rolling friction ball in the rolling start state and there is a rolling friction ball that rolls easily. The structure easily swings due to an external force such as a typhoon. In addition, there is no anti-sway device, and there is an anti-sway device for elastic force and hydraulic pressure separately from the seismic isolation bearing device with friction material storage tank. Even if it is added directly to the structure moved by the rolling of the rolling friction ball rather than directly to the ball, the weight of the structure will vary individually and will correspond to every structure with a different weight. It is considered that it is not easy to prevent the rolling friction ball from rolling by adjusting the elastic force and the oil pressure to resist the external force such as a typhoon.

In addition, the rolling friction ball under the sliding column rolls during the earthquake motion and performs rolling isolation. However, the displacement direction of the ground in earthquake motion is various, and is not necessarily limited to the displacement in the horizontal direction. It can be assumed that the ground is displaced in the vertical direction, the diagonally vertical direction, or the horizontal direction and the vertical direction at the same time.

Therefore, there is no fear that the rolling friction ball will dissipate outside the friction material storage tank, but the rolling friction ball laid in a single layer under the sliding column surface is not always present, and rolling isolation is impossible. Is also possible.

2. Description of the Related Art A conventional seismic isolation device for a lightweight structure using a plurality of balls is known. (For example, refer to Patent Document 4).

The above-mentioned seismic isolation device for a lightweight structure disclosed in Patent Document 4 is a sliding material that supports the center end surface of the support plate in an initial state so that the center end surface of the support table that faces the center end surface is slidably movable. Is fixed on the outer periphery of the center sliding member, and the center end surface of the support base is movably supported on the support base in a state of displacement in the horizontal direction of the support base. A moving body is disposed.

In normal times, the center end surface of the support base comes into contact with the sliding material on the center end surface of the bearing plate, and the sliding structure and the center end surface have a large sliding friction resistance to support the load of the upper structure. Even if an external force such as a typhoon is applied, the upper structure does not swing.

The center end face of the pedestal slides on the sliding material due to the seismic force and performs rolling isolation on the rolling elements. However, the displacement direction of the ground in earthquake motion is various, and is not necessarily limited to the displacement in the horizontal direction. It can be assumed that the ground is displaced in the vertical direction, the diagonally vertical direction, or the horizontal direction and the vertical direction at the same time.

Since the rolling elements disposed on the bearing plate are not constrained by the rolling elements that are closely contacted so that they can freely roll, whether or not the annular groove is formed concentrically on the bearing plate. , Due to short-period seismic motion, it may be unevenly distributed or rolled in any direction, and may be scattered outside the bearing plate.The rolling element will be transferred onto the sliding material, and the sliding material on the central end face It is considered that the center end face rolls to support the rolling element, and the rolling element rolls in a normal state. Therefore, the structure may easily swing due to an external force such as a typhoon.

Japanese Patent Publication No. 28856681 JP 2000-145197 A JP 2001-208130 A JP 2000-120301 A

In Patent Documents 1 and 2 described above, seismic isolation technology is used to obtain a seismic isolation function while the seismic isolation object such as a light structure is always loaded on the upper side of the rolling ball. Since the spring force is indirectly adjusted to the structure and applied to the structure to prevent the rolling ball from rolling, the rolling ball is not completely prevented from rolling. It is considered that there is a problem that a light structure or the like easily swings due to the external force.

In the above-described seismic isolation devices using multiple balls in Patent Documents 2 and 4, the multiple balls are generally technically difficult to constrain. Therefore, the multiple balls arranged on the base and the support plate so as to be freely rollable. May be unevenly distributed or rolled in any direction due to short-period seismic motion, and may be scattered outside the base plate.Therefore, it can be assumed that there is no sphere below the center end face of the sliding plate and base. It is thought that there is a problem that motion isolation is impossible.

In view of the above-described problems of the prior art, the present invention increases the frictional resistance between the upper rolling (sliding) plate and the lower rolling (sliding material) plate by eliminating the presence of the seismic isolation ball. The load of the light structure and the like is stably supported, and the light structure and the like are prevented from swinging easily by an external force such as wind during normal times. The seismic isolation ball is scattered at the time of the earthquake motion, and there is no base isolation ball between the upper and lower rolling plates, so that the rolling isolation is impossible. A plurality of seismic isolation balls that have the advantage of supporting multiple points of load, which can prevent rolling isolation from becoming impossible by successively supplying between the upper sliding and rolling plate and the lower rolling plate. The purpose of the present invention is to provide the seismic isolation device used with a simple structure, long life, easy maintenance and low cost.

A first solution to achieve the above object of the present invention is to screw a horizontal lower rolling plate on the ground side base plate, and to slide and roll a horizontal disk provided under the load support base plate. A cylindrical lower part of an appropriate diameter made of a rigid body with a height equal to the diameter value of the seismic isolation sphere on the appropriate circular area within the projected circular area on the lower rolling plate plane projected by the moving plate Multiple support columns are set so that the distance between the lower support columns is such that the seismic isolation balls can roll freely, and the lower ends are fixed on the lower rolling plate surface with the upper load placed evenly. Then, the lower rolling plate surface within the appropriate circular range is cut to an appropriate depth so that the top of the seismic isolation ball does not contact the upper sliding and rolling plate lower surface except for the fixed lower support column, A sliding support column mechanism with a seismic isolation ball unloaded horizontal bottom is formed.

A load support base is placed on the upper end of a plurality of groups of the lower support pillars by contacting the lower surface of the upper sliding and rolling plate, and flanges are disposed and fixed on the upper face of the load support base. Place the cylindrical support pillar upright, place the mounting plate on the upper end flange, place the lower end base material such as a light structure on the mounting plate, screw them together, and put in the seismic isolation ball The mouth tube is fixed to the upper edge side of the cylindrical support column, the inside of the cylindrical support column is formed as a base isolation ball mixture supply tank, and the bottom plate surface of the base isolation ball mixture supply tank Using the appropriate shape and diameter of the seismic isolation sphere mixture drop cylinder hole so that it surrounds the outer periphery of the upper sliding and rolling plate from the upper surface to the outer periphery of the outer sliding and rolling plate. , Through the top and bottom of the load support platform, open the hole, and in the seismic isolation ball mixture supply tank, overrolling into a number of base isolation balls with the same value as the height of the lower support column Sand for restraint Body of a configuration of a proper amount seismic isolation bearing device comprising storing the mixture obtained by mixing at a ratio of.

Under normal conditions, the bottom surface of the upper sliding and rolling plate is in contact with the upper end of a plurality of columnar lower support columns of a sliding support column mechanism having a horizontal bottom surface with no seismic isolation ball. Since the coefficient of friction between the upper end surface of multiple groups and the lower surface of the upper sliding / rolling plate is large, it stably supports the load of light structures, etc., even if external forces such as wind act on the light structures, etc. There is no fear of swinging.

When large earthquake motion occurs, the diameter of the base-isolated sphere and the height of the lower support column fixed on the lower rolling plate surface are the same value. Roll on the top surface of the group and ride on the seismic isolation ball to start rolling isolation. In synchronism with the horizontal displacement, the mixture of multiple seismic isolation balls and over-rolling control sand particles stored in the seismic isolation ball mixture supply tank passes through the seismic isolation ball mixture drop cylinder hole. It falls between the lower rolling plate surface and the upper sliding / rolling plate lower surface.

The seismic isolation ball that has fallen between the upper surface of the lower rolling plate and the lower surface of the rolling and rolling plate tries to spread over the upper surface of the lower rolling plate. Suppresses over-rolling, and the mixture of seismic isolation balls and over-rolling-preventing sand particles is supplied to the lower rolling plate surface one after another and falls down, so that the upper sliding and rolling plate lower surface during earthquake motion There is no fear that the seismic isolation ball will be absent between the upper surface of the lower rolling plate, and therefore there is no possibility that the rolling isolation will be impossible.

Even if the seismic isolation balls ride on a plurality of groups of the lower support columns due to displacement or jumping in various directions of the seismic motion, the distance between the lower support columns can be freely changed. As a result, the base-isolated sphere falls on the unloaded horizontal bottom surface of the base-isolated ball that has been excised to an appropriate depth so that the top of the base-isolated ball does not touch the bottom surface of the rolling and rolling plate. Is pushed by the following seismic isolation ball and moves onto the lower rolling plate surface. Therefore, the seismic isolation sphere cannot roll on the plurality of groups of the lower support columns after the end of the earthquake motion, and normally rolls between the upper sliding and rolling plate lower surface and the plurality of groups of the lower support columns. There is no problem of rolling isolation, and there is no problem that light structures and the like easily swing due to external forces such as wind.

At the end of the earthquake motion, the over-rolling control sand particles that had fallen from the seismic isolation ball mixture drop cylinder hole were deposited between the bottom end of the seismic isolation ball mixture drop cylinder hole and the lower rolling plate surface. Subsequently, the mixture of the seismic isolation ball and the over rolling suppression sand granule is automatically stopped.

The appropriate depth at which the top of the seismic isolation ball does not contact the upper sliding / rolling plate lower surface is such that the inclined surface provided between the non-loading horizontal bottom surface of the seismic isolation ball and the lower rolling plate surface This is the depth at which an angle can be obtained so that the unloaded seismic isolation ball on the bottom surface can easily climb on the lower rolling plate surface.

The appropriate shape and hole diameter of the seismic isolation ball mixture drop cylinder hole continues without the mixture of the seismic isolation ball and the over-rolling suppression sand granule clogging the seismic isolation ball mixture fall cylinder hole The shape and hole diameter can be dropped.

The mixing ratio of the appropriate amount of the seismic isolation ball and the excessive rolling suppression sand granule is between the bottom end of the base isolation ball mixture drop cylinder hole and the lower rolling plate surface, and the base isolation ball mixture drop cylinder hole is normal. The standard ratio is the mixing ratio that can prevent the amount of sand particles for over-rolling, which can prevent the seismic isolation ball falling from the inside from rolling easily and diffusing and rolling on the lower rolling plate surface. .

The selection of an appropriate circular range within the projected circular range on the lower rolling plate plane projected by the upper sliding and rolling plate is to use the upper sliding and rolling plate and the appropriate circular range as the same diameter circle, The friction coefficient between the upper sliding and rolling plate and the upper end surfaces of the plurality of groups of the lower support columns is maximized, and the smaller the appropriate circular range is, the smaller the friction coefficient is. An appropriate coefficient of friction is used by selecting an appropriate circular range.

The lower rolling plate within the projected circular range on the plane of the upper rolling plate projected by the upper sliding / rolling plate and exceeding the appropriate circular range is removed by penetrating the top and bottom, and in the removed space. A sliding support column mechanism unit with a seismic-isolated ball no-load horizontal bottom surface, which is formed by integrally forming a support plate made of a rigid body of the same shape and height and a plurality of groups of lower support columns, is inserted and fixed. Can be used.

The second solution means that the projection on the plane of the lower rolling plate is projected by the horizontal disc-like upper sliding and rolling plate instead of using the sliding support column mechanism having the horizontal bottom surface with no seismic isolation ball. Within the circular area, the appropriate circular area is cut and removed by penetrating the upper and lower surfaces of the lower rolling plate, and then part of the ground side foundation is also removed and the hole is removed. A cylindrical container with a bottom plate having the same outer diameter and circular shape made of a rigid body is inserted, and on the bottom plate of the cylindrical container, a plurality of lower support pillars having an appropriate diameter made of a rigid body, The seismic isolation balls can be freely rolled and arranged at a position to support the upper load evenly, and the lower end is fixed on the bottom plate of the cylindrical container. The upper end height of the lower support column is the outer circle of the cylindrical container. Align the upper edge of the cylindrical container with the upper edge of the peripheral edge, bring the upper edge of the cylindrical container into contact with the upper sliding and rolling plate bottom surface, and open the cylindrical wall of the cylindrical container in contact with the bottom plate of the cylindrical container First, using a sliding support column mechanism having a container with a seismic isolation ball dropping part, which is connected to one end of the seismic isolation ball rolling discharge pipe and the other end connected to the seismic isolation ball take-out chamber, It is the structure of the seismic isolation bearing apparatus described in the solution.

Even if the seismic isolation ball rides on the lower support column group due to displacement or jumping in various directions of seismic motion, the interval between the lower support columns is defined as the interval at which the seismic isolation ball can freely roll. Therefore, the seismic isolation ball falls into the container from the falling part between the lower support columns and cannot exist on the plurality of groups of the lower support columns. There is no seismic isolation ball that rolls over the group of the lower support pillars, the rolling isolation is impossible, and there is a problem that light structures easily swing due to external forces such as wind do not do. The seismic isolation ball that falls into the container stays in the seismic isolation ball extraction chamber via the seismic isolation ball rolling discharge pipe, and can be collected and reused.

Instead of using a plurality of lower support pillars that form the falling part of the seismic isolation ball, a rigid lattice-like lower support that can bear the load of a light structure or the like is attached to the outer circumference of the cylindrical container. It is possible to substitute the lattice hole diameter as the hole diameter that allows the seismic isolation sphere to easily fall with the upper end height aligned. In addition, it is not limited to a lattice-like lower support body, and any can be used as long as it has an appropriate hole shape that allows the seismic isolation ball to easily fall.

The third solution is to replace the seismic isolation ball mixture supply tank with a mixture in which a plurality of seismic isolation balls are mixed with sand particles for suppressing over-rolling in an appropriate ratio. A cylindrical seismic isolation ball supply tank is separately installed in the center of the ball mixture supply tank, and an appropriate position in the base isolation ball mixture drop cylinder hole from the entire circumference of the bottom of the base isolation ball supply tank. A secondary fall cylinder hole forming cylinder wall is disposed between and fixed, and along the inner cylinder wall of the seismic isolation sphere supply tank, the seismic isolation ball fall holes are arranged at equal intervals on the tank bottom plate using appropriate shapes and hole diameters. The seismic isolation bearing described in the first or second solution means that the sand granule for overrolling suppression is stored in the seismic isolation sphere mixture supply tank, and the seismic isolation sphere is stored in the seismic isolation sphere supply tank. It is the structure of an apparatus.

If the sand particles for over-rolling suppression and the seismic isolation sphere are separated and stored, and dropped separately between the bottom end of the cylinder base and the lower rolling plate, it will be outside the seismic isolation sphere. The falling over-rolling sand granule effectively suppresses the over-rolling of the seismic isolation ball in normal times and suppresses the over-entry of the seismic isolation ball.

In the seismic isolation bearing device according to the first solving means configured as described above, the upper bottom of the upper support and rolling plate is brought into contact with the upper end of a plurality of groups of the lower support pillars, and the seismic isolation ball unloaded horizontal bottom surface is provided. Since the sliding support column mechanism is disposed, the two surfaces are in contact with each other with a large frictional resistance, so that there is no fear that the light structure or the like swings even if an external force such as wind acts on the light structure or the like.

In synchronism with the horizontal displacement of the sliding and rolling plate during the earthquake motion, the seismic isolation ball is automatically generated by the seismic force from the upper base isolation ball mixture supply tank via the base isolation ball mixture drop cylinder hole. A mixture in which sand particles for excessive rolling suppression are mixed in an appropriate amount ratio is continuously supplied onto the lower rolling plate plane, so that the surface between the upper sliding and rolling plate and the lower rolling plate surface is supplied. In this case, the seismic isolation ball is not absent, and the over rolling suppression sand granule suppresses the over rolling of the seismic isolation ball and can continue the stable rolling isolation. At the end of the earthquake motion, the over rolling suppression sand granule closes the bottom end of the base isolation ball mixture dropping cylinder hole, and the supply of the mixture of the base isolation ball and the over rolling suppression sand granule is automatically stopped.

Even if the seismic isolation ball jumps during the earthquake motion and rolls onto the multiple groups of the lower support columns, the spacing between the support columns is set as the interval at which the seismic isolation balls can freely roll. The seismic ball falls on the horizontal bottom of the no-load-isolated ball, so that normally there is no seismic-isolated ball on the multiple groups of the lower support columns, and the upper and lower groups of the lower support columns slide upward. Rolling seismic isolation is not possible between the rolling plates, the friction resistance between them is large, and the load of light structures, etc. is stably supported, even if external forces such as wind act on the light structures, etc. There is no fear of swinging.

In the seismic isolation bearing device according to the second solving means, instead of using the sliding support column mechanism having the horizontal bottom surface of the seismic isolation ball, the sliding support column mechanism having the container with the seismic isolation ball dropping part is used. Even if the seismic isolation ball jumps during the earthquake motion and rolls on the lower support column group, the seismic isolation ball falls into the cylindrical container without stagnation.

In the seismic isolation bearing device according to the third solving means, when the over rolling suppression sand granule and the seismic isolation sphere are separated and stored, when falling onto the upper surface of the lower rolling plate, The falling over-rolling sand granule prevents over-rolling of the seismic isolation ball even more effectively.

Since the seismic isolation bearing device does not use rotating equipment and is not made of a material that deteriorates over time, maintenance management for many years is extremely economical. Furthermore, since the seismic isolation ball and the over-rolling suppression sand particles are collected and reused after the end of the earthquake motion at the end of the earthquake motion, there is an economy that does not become a consumable item.

(A) The longitudinal cross-sectional view of the seismic isolation bearing apparatus A which concerns on Embodiment 1. FIG. (B) The cross-sectional top view which shows the seismic isolation sphere mixture fall cylinder hole opened to the load support base of the XX part of FIG. 1a. (c) The enlarged plan view in the notch semicircle of the slide support column mechanism unit D with the horizontal base of the base-isolated sphere in the solid line great circle G of FIG. 1a. (d) Enlarged cross-sectional view of the sliding support column mechanism unit D having a horizontal bottom surface with no seismic isolation ball in the solid circle G shown in FIG. 1a. (A) Longitudinal sectional view of the seismic isolation bearing device A in FIG. (B) The top view at the time of the horizontal displacement state including the partial support line of the load support base of the YY part of FIG. (A) The longitudinal cross-sectional view of the seismic isolation bearing apparatus B which concerns on Embodiment 2. FIG. (B) The top view of the sliding support column mechanism E provided with the container with a seismic isolation ball drop part in the solid line great circle H of Drawing 3a. (c) The expanded sectional view of the sliding support column mechanism E provided with the container with a seismic isolation ball drop part in the solid line great circle H of Drawing 3a. (A) The longitudinal cross-sectional view of the seismic isolation bearing apparatus C which concerns on Embodiment 3. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The small black circles in the figure indicate sand particles for overrolling suppression, the central white circles indicate seismic isolation balls, and the large black circles indicate columnar lower support columns. The same number is attached to the same thing through all the drawings, and duplication of explanation is avoided.

(First Embodiment) The seismic isolation bearing device A will be described with reference to FIGS. 1 to 2. A horizontal lower rolling plate 2 is screwed onto the ground-side base plate 1, and the load supporting base 3 is placed under the load supporting plate 3. The lower rolling plate 2 plane range that is appropriately wider than the projection outer peripheral edge range projected by the provided horizontal disc-shaped upper sliding and rolling plate 4 is removed by penetrating vertically in an appropriate shape.

In a shape that fits in the space of the removed lower rolling plate 2, on the lower support plate 5 that is a rigid body of the same height, on the appropriate circular range 6 within the disc shape range of the upper sliding and rolling plate 4 , A plurality of cylindrical lower support pillars 8 having an appropriate diameter made of a rigid body having the same height as the diameter value of the base isolation sphere 7, and the base isolation balls 7 can freely roll between the lower support pillars 8. The lower end is fixed on the lower support board 5 with a possible interval and at a position where the upper load is evenly supported.

The surface of the lower support plate 5 within the appropriate circular range 6 is cut to an appropriate depth so that the top of the base isolation ball 7 does not contact the lower surface of the upper sliding and rolling plate 4 except for the fixed lower support column 8. Thus, a base-free horizontal bottom surface 9 is formed, and a sliding support column mechanism unit D having a base-free horizontal bottom surface is provided.

The lower support plate 5 of the sliding support column mechanism unit D is inserted and fixed in the space of the removed lower rolling plate 2, and the lower surface of the upper sliding and rolling plate 4 is put on the plurality of groups of the lower support columns 8. The load supporting base 3 is placed in contact therewith.

On the upper surface of the load support base 3, a cylindrical support column 10 having flanges arranged and fixed at both ends is placed and erected, a mounting plate 11 is placed on the upper end flange, and a light structure is mounted on the mounting plate 11. The base material 12 such as a lower end is mounted and screwed between the base material 12 and the base isolation ball inlet tube 13 is fixed to the upper edge side of the cylindrical support column 10. The upper slide / rolling plate 4 is formed between the upper surface of the load support base plate 3 serving as the bottom plate surface of the seismic isolation ball mixture supply tank 14 and the outer periphery of the outer slide / rolling plate 4 outside the outer circumference of the outer circle. The seismic isolation sphere mixture dropping cylinder hole 15 is opened by penetrating the upper and lower portions of the load support base 3 using an appropriate shape and hole diameter at equal intervals so as to surround the entire outer peripheral edge. In the mixture supply tank 14, an excessive amount of sand particles 16 for suppressing over-rolling is appropriately added to the plurality of base-isolated spheres 7 having the same value as the height of the columnar lower support column 8. Storing the mixture obtained by entering.

As the plurality of seismic isolation balls 7 to be used, plated steel balls, stainless steel balls, various metal balls, various plastic balls, ceramic balls, and the like are used. The sphere diameter is more suitable from the viewpoint that the small sphere supports the load more than the large sphere. The lower rolling plate 2 is appropriately selected from the diameter and the like.

The horizontal lower rolling plate 2 is a rigid body, and a plurality of seismic isolation balls 7 to be used have a smooth surface that can roll while supporting a load. Steel, light metal, high-strength concrete, fiber reinforced concrete, fiber A plate material such as reinforced plastic is used. In addition, a thin stainless steel plate is stretched over ordinary concrete, and it is used by utilizing a smooth surface and non-rusting property.

When a cushioning material 17 formed by laminating a rubber-like elastic body and a steel plate for allowing the inclination of the cylindrical support column 10 between the upper end flange of the cylindrical support column 10 and the mounting plate 11 is screwed. An upward, gently conical lower rolling plate is used, and the in-situ restoring force can be utilized.

The horizontal lower rolling plate 2 is provided on the entire outer peripheral edge side of the upper sliding and rolling plate 4 with a rolling permissible width surface that can displace the horizontal displacement required by the upper sliding and rolling plate 4 without hindrance.

The load support base 3 and the upper sliding / rolling plate 4 are preferably formed of a steel material integrally and subjected to rust prevention treatment. Any material can be used as long as it is made of a rigid material and is more economical than steel.

A mixture obtained by mixing the bottom end of the base-isolated sphere mixture dropping cylinder hole 15 of the load supporting base 3 with a plurality of base-isolated spheres 7 and an excessive rolling suppression sand granule 16 in an appropriate amount ratio is It may be used by appropriately expanding the rolling plate 2 so that it can be easily dropped. Further, the entire outer peripheral edge of the load support base 3 is also formed as an appropriate surface by making the entire outer peripheral inclined surface so that the lower surface of the upper sliding and rolling plate 4 can easily ride on the seismic isolation ball 7 without any trouble. Let

The sliding support column mechanism unit D having a seismic isolation ball no-load horizontal bottom surface is placed in an appropriate circular range 6 within the disc-shaped range of the upper sliding and rolling plate 4 on the lower support plate 5 made of steel. The lower support plate is formed by screwing the lower end side of the steel rod to be the lower support column 8 having an appropriate diameter at a position where the upper base load is evenly supported at an interval where the seismic isolation balls 7 to be used can freely roll. 5 may be opened and screwed, or a steel rod end may be inserted and bonded. Further, the lower support plate 5 and the lower support column 8 can be used by appropriately molding various materials made of a rigid body as appropriate, and integrally molding them. When integrally molded, the seismic isolation sphere unloaded horizontal bottom surface 9 can be easily formed simultaneously.

In the present embodiment, the cylindrical support column 10 will be described using the cylindrical support column 10 in the drawings, but an appropriate cylindrical support column such as a rectangular tube shape or a polygonal tube shape is used. It can be economically obtained by using a general-purpose construction steel pipe with flanges arranged at both ends and rust-proofing. Other than the steel pipe, any can be used as long as it can be formed of a cheap and suitable rigid material.

The inside of the cylindrical support column 10 is formed as a seismic isolation sphere mixture supply tank 14, and is used by penetrating the top and bottom of the load support base plate 3 that becomes the bottom plate surface of the seismic isolation sphere mixture supply tank 14. The seismic isolation ball mixture dropping cylinder hole 15 is within the range in which the load support function of the load support base 3 is not lost, and the entire outer circle of the upper sliding and rolling plate 4 from the bottom surface side of the base isolation ball mixture supply tank 14. Holes are formed at equal intervals along the outer periphery, so as to surround the entire outer periphery of the upper sliding and rolling plate 4.

Appropriate shapes and hole diameters are stored in the seismic isolation sphere mixture supply tank 14 and have a plurality of seismic isolation spheres 7 and over-rolling suppression sand granules having the same value as the height of the lower support column 8. The shape with which the mixture with No. 16 can be inserted without any trouble without clogging the seismic isolation ball mixture drop cylinder hole 15 between the upper sliding and rolling plate 4 and the lower rolling plate 2 due to seismic force during earthquake motion And the hole diameter.

The over rolling suppression sand granule 16 is made of natural sand or artificial sand. For the purpose of suppressing over rolling of the seismic isolation sphere 7, sand particles having a small particle diameter that are more likely to enter between the seismic isolation balls 7. Suitable for use, and sand particles having a particle size distribution of medium sand (about 0.5 mm particle size) or less are suitable for use. Among the sand particles, natural silica sand and artificial silica sand are widely marketed by particle size distribution, and silica sand having an appropriate particle size distribution (or single particle size) is easily used. Select and use an appropriate mineral sand granule.

The operation of the above configuration will be described below. Under normal circumstances, the bottom surface of the upper sliding and rolling plate 4 abuts on the upper end of a plurality of groups of the lower supporting columns 8 of the sliding supporting column mechanism unit D having the seismic isolation ball unloaded horizontal bottom surface 9, and the lower supporting columns 8 has a large friction coefficient between the upper end surface of the plurality of groups and the lower surface of the upper sliding / rolling plate 4 so that the load of the light structure and the like is stably supported, and even if an external force such as wind acts on the light structure or the like There is no fear that the structure will swing.

When a large earthquake motion occurs, the diameter value of the seismic isolation sphere 7 and the height of the lower support column 8 fixed on the lower rolling plate 2 surface are the same value, and therefore the lower surface of the upper sliding and rolling plate 4 is the lower support column 8. Slid on the upper end surface of the plurality of groups and ride on the seismic isolation ball 7 and start rolling isolation. In synchronism with the horizontal displacement, the mixture of the plurality of seismic isolation spheres 7 and the over rolling suppression sand granules 16 stored in the seismic isolation sphere mixture supply tank 14 is the seismic isolation sphere mixture dropping cylinder hole 15. Through the lower rolling plate 2 surface and the upper sliding and rolling plate 4 lower surface.

The seismic isolation ball 7 that has fallen between the upper surface of the lower rolling plate 2 and the lower surface of the upper sliding / rolling plate 4 tends to overroll and diffuse to the upper surface of the lower rolling plate 2. Suppresses over-rolling of the seismic isolation ball 7, and further, a mixture of the seismic isolation ball 7 and the over-rolling-preventing sand granule 16 is supplied to the lower rolling plate 2 one after another and falls down, There is no fear that the seismic isolation ball 7 is absent between the lower surface of the upper sliding / rolling plate 4 and the upper surface of the lower rolling plate 2 during the earthquake motion, and therefore there is no possibility that the rolling isolation is impossible.

Even if the seismic isolation ball 7 rides on a plurality of groups of the lower support columns 8 due to displacement or jumping in various directions of seismic motion, the seismic isolation ball 7 can freely change the interval between the lower support columns 8. The seismic isolation sphere 7 falls on the horizontal base 9 with no load on the seismic isolation sphere that has been excised to an appropriate depth so that the top of the base isolation sphere 7 does not contact the upper sliding / rolling plate 4 lower surface. Then, the unloaded seismic isolation ball 7 is pushed by the subsequent seismic isolation ball 7 and moves onto the lower rolling plate surface 2. Therefore, the seismic isolation ball 7 cannot exist on the plurality of groups of the lower support columns 8 after the end of the earthquake motion, and rolls between the bottom surface of the upper sliding / rolling plate 4 and the plurality of groups of the lower support columns 8 in a normal state. The seismic isolation ball 7 does not exist, and the rolling isolation is impossible, and there is no problem that the light structure or the like easily swings due to an external force such as wind.

At the end of the earthquake motion, the over-rolling suppression sand particles 16 that have fallen from the base isolation ball mixture drop cylinder hole 15 are deposited between the lower end of the base isolation ball mixture drop cylinder hole 15 and the lower rolling plate 2 surface. Therefore, the mixture of the subsequent seismic isolation sphere 7 and the excessive rolling suppression sand granule 16 is automatically stopped.

(Second Embodiment) The seismic isolation bearing device B will be described with reference to FIG. 3. Instead of using the sliding support column mechanism A provided with the seismic isolation ball no-load horizontal bottom surface 9, An appropriate circular range 6 within the projected circular range on the plane of the lower rolling plate 2 projected by the rolling plate 4 is cut and removed by passing between the upper and lower surfaces of the lower rolling plate 2 and continued. A part of the ground side foundation board 1 is also removed, and a cylindrical container 18 having a circular outer plate with the same outer diameter and made of a rigid body is inserted into the hole-removed space, on the bottom plate of the cylindrical container 18. The lower support pillars 8 having an appropriate diameter made of a rigid body are arranged at positions where the lower support pillars 8 can be spaced apart from each other so that the seismic isolation balls 7 can freely roll, and the upper load is evenly supported. The lower end is fixed on the bottom plate of the cylindrical container 18, the upper end height of the lower support column 8 is aligned with the upper end height of the outer peripheral edge of the cylindrical container 18, and the cylindrical container 18 is brought into contact with the lower surface of the upper sliding / rolling plate 4, and the cylindrical wall of the cylindrical container 18 in contact with the bottom plate of the cylindrical container 18 is opened to connect one end of the seismic isolation ball rolling discharge pipe 19. And, it is a configuration of the seismic isolation bearing device B using the sliding support column mechanism E having the container 18 with the seismic isolation ball dropping part, the other end of which is connected to the seismic isolation ball extraction chamber 20.

The cylindrical container 18 having a circular outer plate with the same outer diameter and made of a rigid body is made of a material such as rust-proof steel (including cast), light metal, high-strength concrete, fiber-reinforced concrete, fiber-reinforced plastic, and high-strength plastic. In addition, the lower end side of the steel rod to be the lower support pillar 8 having an appropriate diameter is formed into a screw shape, and the bottom plate is opened and screwed, or the end of the steel rod is inserted and bonded. May be used. Furthermore, the cylindrical container 18 and the lower support column 8 can be integrally molded and used by appropriately using various materials made of a rigid body.

Instead of using a plurality of the lower support pillars 8 forming the falling part of the seismic isolation sphere 7, a rigid lattice-like lower support that can bear a load of a light structure or the like is used for the cylindrical container 18. It is possible to substitute the lattice hole diameter as the hole diameter that allows the seismic isolation sphere 7 to easily fall with the upper end height of the outer circle periphery aligned. In addition, it is not limited to a grid | lattice-like lower support body, Any can be used if it has an appropriate hole shape that allows the seismic isolation ball 7 to easily fall.

The operation of the above configuration will be described below. Even if the seismic isolation ball 7 rides on a plurality of groups of the lower support columns due to displacement or jumping in various directions of the seismic motion, the seismic isolation ball 7 can freely roll between the lower support columns 8. The seismic isolation sphere 7 falls into the cylindrical container 18 from the falling part between the lower support columns 8 and cannot exist on a plurality of groups of the lower support columns 8 because the spacing is possible. Therefore, there is no seismic isolation ball 7 that rolls between the lower surface of the upper sliding / rolling plate 4 and the lower support column 8 in a normal state, and the rolling isolation is impossible. There is no problem that the structure or the like swings easily. The seismic isolation ball dropped into the cylindrical container 18 stays in the seismic isolation ball take-out chamber 20 via the seismic isolation ball rolling discharge pipe 19 and is collected after the end of the earthquake motion and can be reused.

(Third Embodiment) Explaining the seismic isolation bearing device C with reference to FIG. 3, the amount of sand particles 16 for suppressing over-rolling is appropriately determined in a plurality of seismic isolation balls 7 in the seismic isolation sphere mixture supply tank 14. In place of storing the mixture mixed in the ratio, a cylindrical seismic isolation sphere supply tank 21 is separately provided in the center of the seismic isolation sphere mixture supply tank 14 to supply the seismic isolation sphere. A sub-falling cylinder hole forming cylinder wall 22 is disposed and fixed between appropriate positions in the seismic isolation sphere mixture dropping cylinder hole 15 from the circumferential edge of the lower end of the tank 21, and the inner cylinder wall of the seismic isolation ball supply tank 21 is fixed. The base-isolated sphere dropping holes 23 are opened at equal intervals in the tank bottom plate using an appropriate shape and hole diameter, and the over-rolling suppression sand granules 16 are stored in the base-isolated sphere mixture supply tank 14. And, it is the structure of the seismic isolation bearing device C used in the first or second embodiment in which the seismic isolation sphere 7 is stored in the seismic isolation sphere supply tank 21.

The seismic isolation sphere mixture supply tank 14 and the sub-falling cylinder hole forming cylinder wall 22 are made of a material such as a steel plate, a stainless plate (treated with rust prevention), a light metal plate, a fiber reinforced plastic plate, a high strength plastic plate, or the like. Moreover, the seismic isolation sphere mixture supply tank 14 and the sub-falling cylinder hole forming cylinder wall 22 can be integrally molded and used. The seismic isolation ball mixture supply tank 14 and the load support base 3 are firmly screwed and fixed.

The operation of the above configuration will be described below. If the sand roll 16 for over-rolling suppression and the seismic isolation sphere 7 are separated and stored, and the seismic isolation sphere mixture dropping cylinder hole 15 is separately dropped between the lower end of the cylinder 15 and the two lower rolling plates, the seismic isolation is achieved. The over-rolling-suppressing sand granule 16 falling outside the sphere 7 effectively suppresses the over-rolling of the seismic isolation sphere 7 in normal times, and suppresses the over-entry of the seismic isolation sphere 7.

A Seismic isolation device according to the first embodiment.
B Seismic isolation device according to the second embodiment.
C Seismic isolation device according to the third embodiment.
D Sliding support column mechanism unit with a seismic isolation ball unloaded horizontal bottom.
E Sliding support column mechanism with a container with a seismic isolation ball drop.
G Solid line great circle.
H Solid line great circle.
1 Ground side foundation.
2 Lower rolling plate.
3 Load support base.
4 Sliding and rolling plate.
5 Lower support board.
6 Within the appropriate circular range.
7 Seismic isolation ball.
8 Columnar lower support column.
9 Seismic isolation ball no load horizontal bottom.
10 Cylindrical support column.
11 Mounting plate.
12 Lower end base material such as a light structure.
13 Seismic isolation ball inlet tube.
14 Seismic isolation ball mixture supply tank.
15 Seismic isolation ball mixture drop cylinder hole.
16 Sand granule for excessive rolling suppression.
17 cushioning material.
18 Cylindrical container with bottom plate.
19 Seismic isolation ball rolling discharge pipe.
20 Seismic isolation room.
21 Base-isolated ball supply tank.
22 Sub-falling cylinder hole forming cylinder wall.
23 Seismic isolation ball drop hole.

Claims (3)

Arranged in the main part between the lower end base material of the light structure etc. and the ground side foundation board, a plurality of seismic isolation balls are arranged freely on the lower rolling plate, and the lower end of the light structure etc. Seismic isolation with a protruding load-supporting column with a disk-shaped upper rolling plate with a smooth bottom surface at the bottom and a lower surface abutting on the base isolation sphere. In the bearing device,
The projected circular area on the lower rolling plate plane is projected by the horizontal disc-like upper sliding and rolling plate that is screwed onto the ground-side foundation and screwed into the horizontal lower rolling plate. A plurality of cylindrical lower support columns with an appropriate diameter made of a rigid body whose height is the same as the diameter value of the seismic isolation sphere, within the appropriate circular range, and the base isolation sphere Freely rollable intervals, placed at a position to support the upper load evenly, and the lower end is fixed on the lower rolling plate surface, and the lower rolling plate surface within the appropriate circular range is fixed. Except for the lower support column, the top of the base-isolated sphere is excised to an appropriate depth so that it does not come into contact with the bottom surface of the sliding and rolling plate, and a slide support column mechanism with a base-free horizontal bottom surface is formed, A load support base is placed on the upper end of a plurality of lower support pillars with the upper slide / rolling plate lower surface abutting on the upper surface of the load support base. A cylindrical support column is fixedly mounted, and a mounting plate is mounted on the upper end flange, and a lower end base material such as a light structure is mounted on the mounting plate and screwed between them. The seismic isolation ball inlet tube is fixed to the upper edge side of the cylindrical support column, and the inside of the cylindrical support column is made as a base isolation ball mixture supply tank, which becomes the bottom plate surface of the base isolation ball mixture supply tank. The seismic isolation sphere mixture drop cylinder hole is appropriately shaped at equal intervals so as to surround the entire outer periphery of the upper sliding / rolling plate from the upper surface of the load support base to the outer periphery of the upper sliding / rolling plate. And the hole diameter of the load-supporting base plate. The base-isolated sphere has a diameter equal to the height of the cylindrical lower support column in the base-isolated ball mixture supply tank. A base-isolated bearing device comprising a plurality of a mixture in which sand particles for suppressing overrolling are mixed in an appropriate amount ratio. Instead of using a sliding support column mechanism with a seismic-isolated ball no-load horizontal bottom surface, a horizontal disc-shaped upper sliding and rolling plate projects, and the appropriate shape within the disk-shaped range on the lower rolling plate plane is projected. The circular range is cut and removed by penetrating the upper and lower surfaces of the lower rolling plate, and then part of the ground side foundation is also removed, and the outer space made of a rigid body is removed in the removed space. Insert a cylindrical container with a circular circular bottom plate, and place multiple cylindrical lower support pillars of appropriate diameter made of rigid bodies on the bottom plate of the cylindrical container. It is possible to roll it, it is arranged at a position that supports the upper load evenly, the lower end is fixed on the bottom plate of the cylindrical container, the upper end height of the lower support column is aligned with the upper end height of the outer peripheral edge of the cylindrical container, The upper end side of the cylindrical container is brought into contact with the upper sliding and lower surface of the rolling plate, the cylindrical wall of the cylindrical container in contact with the bottom plate of the cylindrical container is opened, and the seismic isolation ball rolling discharge pipe The seismic isolation system according to claim 1, wherein a sliding support column mechanism having a container with a seismic isolation ball dropping part, wherein one end port is connected and the other end port is connected to a seismic isolation ball extraction chamber. Bearing device. Instead of storing a mixture of sand balls for over-rolling suppression in an appropriate amount ratio in a plurality of base isolation balls in the base isolation ball mixture supply tank, A separate cylindrical base-isolated ball supply tank is installed in the center side, and the secondary drop cylinder hole is located between the entire circumference of the bottom of the base-isolated ball supply tank and an appropriate position in the base-isolated ball mixture drop cylinder hole. Formed cylindrical wall is fixed, and along the inner cylindrical wall of the seismic isolation ball supply tank, seismic isolation ball drop holes are opened on the tank bottom plate at appropriate intervals using appropriate shapes and hole diameters. The seismic isolation bearing device according to claim 1 or 2, characterized in that a sand granule for suppressing over-rolling is stored in a mixture supply tank, and a base isolation ball is stored in the base isolation ball supply tank.

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