JP4659919B1 - Seismic isolation device - Google Patents

Abstract

【Task】
The upper load is evenly supported on the entire surface of the upper sliding / rolling plate and the sliding friction resistance between the upper sliding / rolling plate and the lower support column is reduced, so that the upper sliding / rolling plate is changed from rolling isolation to sliding isolation. The seismic isolation device is provided that can withstand slip even if there is no seismic isolation ball on the lower rolling plate and the upper sliding / rolling plate in the event of an earthquake motion. .
[Solution]
The unused surface on the lower surface of the load support base 3 is made to slide on the outer peripheral edge and the rolling plate 24, and the central support column 25 is erected in the seismic isolation ball mixture supply tank 14 to support it evenly. The seismic ball no-load horizontal bottom surface 9 is returned to the level of the lower rolling plate 2 before excision, and the seismic isolation ball 7 is caused to roll as a sliding plate 27 for reducing sliding friction so that the upper sliding and rolling plate 4 A height lower than the ball height of the seismic isolation sphere 7 at a position on the lower rolling plate 2 where the sliding friction resistance between the lower support columns 8 is reduced and does not interfere with the rolling isolation of the seismic isolation sphere 7 A plurality of sliding seismic isolation protrusions 31 whose upper ends are semi-spherical are fixed to enable sliding isolation.
[Selection] Figure 2

Description

The present invention supports the load as a sliding support between the cylindrical lower support column and the upper sliding and rolling plate, utilizing the seismic force from the seismic isolation sphere mixture supply tank in the cylindrical support column, In a base-isolated bearing device that supplies a plurality of base-isolated balls and sand particles for over-rolling suppression between the upper and lower rolling plates and makes the rolling seismic isolation, the upper load and the rolling plate must support the imbalance. In addition, the sliding friction resistance force between the upper sliding / rolling plate and the lower support column is reduced, and the height of the lower rolling plate is appropriately lower than the ball height of the seismic isolation sphere. The present invention relates to a case where a plurality of sliding seismic isolation protrusions are arranged and fixed so that they can be isolated in the event of rolling isolation.

In the conventional technology, the load is supported as a sliding support between the cylindrical lower support column and the upper sliding and rolling plate, and the seismic force is utilized from the seismic isolation sphere mixture supply tank in the cylindrical support column, There is a seismic isolation bearing device that supplies a plurality of seismic isolation balls and over-rolling suppression sand particles between upper and lower rolling plates to make the rolling isolation. (For example, refer to Patent Document 1).

The above seismic isolation bearing device will be described below.

The upper load of a light structure or the like is in contact with the lower surface from the cylindrical support column 10 to the load support base 3 and further from the horizontal disc-shaped upper sliding and rolling plate 4 provided below the load support base 3. The ground side foundation 1 is supported via the lower rolling plate 2 through the cylindrical lower support pillars 8.

Then, the entire outer peripheral edge of the upper sliding / rolling plate 4 is provided between the upper surface of the load supporting base plate 3 and the outer peripheral edge of the upper sliding / rolling plate 4, which is the bottom plate surface of the seismic isolation ball mixture supply tank 14. The seismic isolation sphere mixture dropping cylinder hole 15 is opened by penetrating the upper and lower portions of the load support base plate 3 using an appropriate shape and hole diameter at equal intervals so as to surround it.

In addition, the seismic isolation is within the appropriate circular range 6 within the projected circular range on the surface of the lower rolling plate 2 projected by the horizontal disc-shaped upper sliding and rolling plate 4 provided below the load support base 3. A plurality of cylindrical lower support pillars 8 having an appropriate diameter made of a rigid body having a height equal to the diameter value of the sphere 7, and the lower support pillars 8 are spaced apart from each other so that the seismic isolation sphere 7 can freely roll. The lower end is fixed on the lower support board 5 at a position where the upper load is evenly supported, and the fixed lower support pillar 8 is removed on the surface of the lower support board 5 in the appropriate circular range 6. Then, the top of the base-isolated ball 7 is cut to an appropriate depth so that it does not contact the bottom surface of the top-sliding / rolling plate 4 to form a sliding support column mechanism unit D having a base-free base 9 for base-isolated balls. Sometimes the upper load is supported by the plurality of lower support pillars 8 from the upper sliding and rolling plate 4.

Japanese Patent No. 4510932

In the conventional seismic isolation bearing device described above, since the seismic isolation ball mixture dropping cylinder holes 15 are provided at equal intervals so as to surround the entire outer circumferential edge of the upper sliding and rolling plate 4, the light structure The upper slide and the rolling plate 4 support the upper load such as from the cylindrical support column 10 via the partial load support base 3 having a small area between the plurality of base-isolated sphere mixture dropping cylinder holes 15. The load is concentrated on a part of the load support base 3 having a small area, and the entire surface of the upper sliding / rolling plate 4 does not bear the upper load evenly. In order to support a heavier load evenly on the upper sliding and rolling plate 4, it is necessary to take measures such as increasing the thickness of the load support base 3.

Next, since the upper load is supported by the plurality of lower support columns 8 from the upper sliding / rolling plate 4 in normal times, the sliding friction resistance force between the lower surface of the upper sliding / rolling plate 4 and the lower support column 8 is large. . Therefore, it is difficult to start the sliding seismic isolation operation in response to the small horizontal seismic force, and further, the horizontal seismic force exceeding the sliding frictional resistance force between the two acts during the seismic motion, and the upper sliding and rolling plate 4 When the upper slide / rolling plate 4 rolls off the seismic isolation ball 7 and rides on the lower support column 8 and shifts to the seismic isolation. Due to the difference in frictional resistance between rolling friction and sliding friction, a large shock is generated each time, which adversely affects the light structure and the like with a decrease in shock and seismic attenuation.

In addition, since the seismic isolation sphere mixture dropping cylinder hole 15 is not provided with a fall prevention tool for the seismic isolation sphere 7, the seismic isolation sphere mixture supply tank 14 in the cylindrical support column 10 has a plurality of seismic isolation spheres 7 and When the excessive rolling suppression sand granule 16 is stored, it is easily dropped from the seismic isolation sphere mixture dropping cylinder hole 15 and the workability is remarkably hindered.

Furthermore, the seismic isolation sphere 7 stored in a large amount in the base isolation sphere mixture supply tank 14 during a large earthquake motion is stored on the surface of the lower rolling plate 2 from the base isolation sphere mixture drop cylinder hole 15. Since 7 is supplied as long as 7 exists, there is little possibility that the seismic isolation sphere 7 is absent on the lower rolling plate 2 plane. However, large earthquakes sometimes move far beyond expectations. Assuming that the seismic isolation ball 7 is not present between the lower rolling plate 2 surface and the upper sliding / rolling plate 4, the side surface of the upper sliding / rolling plate 4 becomes the side surface of the cylindrical lower support column 8. It is expected to crash, and it can be assumed that seismic isolation is impossible.

The present invention solves the above-described problems of the conventional seismic isolation bearing device described above, and eliminates the fact that the upper slide / rolling plate 4 supports the upper load unbalanced. The sliding friction resistance force between the rolling plate 4 and the cylindrical lower support column 8 is reduced, and the seismic isolation operation is started in response to a smaller horizontal seismic force, and the light structure is adversely affected. Furthermore, the seismic isolation ball 7 stored in the seismic isolation ball mixture supply tank 14 is prevented from falling off and the workability is improved. Also, the upper sliding and rolling plate 4 To provide a seismic isolation bearing device that can perform sliding isolation operation even if the base isolation ball 7 does not exist during this period, with a simple structure, low cost, long life, and easy maintenance. Objective.

In order to achieve the above object of the present invention, a first solving means is the same plane in which the lower surface of the load supporting base contacting the outer periphery of the upper sliding / rolling plate is continuous with the horizontal lower surface of the upper sliding / rolling plate. In addition, the seismic isolation sphere is formed as a sliding and rolling plate on the outer peripheral edge, and on an appropriate circular range within the projected circular range on the lower rolling plate surface projected by the sliding and rolling plate on the outer peripheral edge. The cylindrical lower support pillars made of a rigid body with the same height as the diameter value of the cylinders, and the lower support pillars are spaced apart from each other so that the seismic isolation balls can roll freely. The lower end of the seismic isolation ball is fixed on the lower rolling plate surface within the appropriate range, except for the fixed lower support column. Is cut to an appropriate depth that does not contact the bottom surface of the sliding and rolling plate to form a sliding support column mechanism with a horizontal bottom surface with no seismic isolation ball Shin is the configuration of the bearing unit.

By providing a sliding and rolling plate on the outer peripheral edge, the load on the upper load of a light structure, etc. is concentrated only on a part of the load support base with a narrow area between the plurality of base-isolated ball mixture drop cylinder holes. Without this, the upper sliding / rolling plate and the outer peripheral upper sliding / rolling plate can be dispersedly supported.

In addition, the non-use surface on the bottom surface of the load support base is made effective as a sliding and rolling plate on the outer peripheral edge without increasing the diameter of the cylindrical support column, and thus the area of sliding and rolling becomes wider and wider. As a result, the number of contacts between the seismic isolation ball and the rolling plate increases at the time of rolling isolation, and the seismic isolation ball supports the upper load more and can perform stable rolling isolation.

In addition, by forming a sliding support column mechanism with a non-loading horizontal bottom surface on the outer peripheral edge above the sliding and rolling plate, the sliding between the outer peripheral upper sliding and rolling plate and the cylindrical lower support column group is formed. Seismic isolation balls cannot exist, and the upper load is stably supported by preventing sliding due to strong winds by sliding friction resistance force between the outer peripheral upper sliding and rolling plate lower surface and the cylindrical lower support column group at normal times. And can be supported by a cylindrical lower support column.

The second solving means is a central support of an appropriate shape made of a rigid body between the upper surface of the load support base plate and the lower surface of the mounting plate, which becomes the bottom plate surface of the seismic isolation sphere mixture supply tank in the cylindrical support column. Place an appropriate number of columns, stand upright with both ends abutting the upper surface of the load support base and the lower surface of the mounting plate, and properly support and fix the central support column to the inner surface side of the seismic isolation sphere mixture supply tank It is a configuration.

By providing an appropriate number of central support pillars of appropriate shape, the upper load of light structures, etc. can be efficiently distributed to the central support pillar, eliminating the upper load from being supported by the sliding and rolling plates in an unbalanced manner. It can be evenly supported by the lower support pillar and the base-isolated ball.

The appropriate shape and the appropriate number of central support pillars indicate that a plurality of seismic isolation balls and over-rolling control sand granules stored in the seismic isolation ball mixture supply tank can be used without any problems during earthquake motion. In addition to being able to drop and supply from the hole onto the surface of the lower rolling plate, the shape and number are such that the amount of storage of the mixture is not reduced as much as possible.

The third solution is that an appropriate small number of seismic isolation spheres ride on the height of the base bottom of the base-isolated spheres at the appropriate lower or upper support pillars in the base-free horizontal base of the base isolation sphere. Within the range that can be removed, return to the level of the lower rolling plate plane before the excision, put an appropriate small number of seismic isolation balls on the returned lower rolling plate surface, and the top of the base isolation ball will slide upward It is the structure which became the rolling plate surface for sliding friction reduction which can contact the rolling plate lower surface.

The reason why an appropriate small number of seismic isolation balls can be used is that a large number of seismic isolation balls can be installed on the rolling plate surface for reducing sliding friction. When the ball rides on and rolls, the rolling friction exceeds the sliding friction, and the sliding friction resistance decreases too much, so that the strong wind swinging between the upper sliding / rolling plate and the cylindrical lower support column is normal. Prevents sliding friction resistance. Therefore, it is possible to reduce the surplus sliding friction resistance force while securing the number of cylindrical lower support columns that can obtain strong wind swing resistance sliding friction resistance force. A rolling plate surface for reducing sliding friction with a small area where a seismic ball can ride is required.

In normal times, the upper load of a light structure, etc., can maintain a small number of seismic isolation spheres and high wind resistant anti-sliding sliding frictional resistance, where the base isolation sphere height and the lower support column height are the same. Both the columnar lower support pillars share and support and hold strong wind-resistant anti-sliding frictional resistance.

At the time of earthquake motion, a small number of seismic isolation spheres on the rolling plate surface for reducing sliding friction roll to start sliding and rolling seismic isolation in response to the seismic motion of smaller horizontal seismic force, The outer peripheral upper sliding / rolling plate and the upper sliding / rolling plate can be easily transferred onto the seismic isolation ball. Furthermore, even during full-amplitude horizontal displacement, the difference in frictional resistance between sliding and rolling friction and rolling friction is reduced, and the moment of transition from rolling isolation to a cylindrical lower support column is reduced. It will become smaller, and the adverse effects of shocks and reduced seismic vibration damping on light structures will be reduced.

The fourth solution consists of the upper surface of the load support base plate which is the bottom plate surface in the seismic isolation sphere mixture supply tank and has an opening of the seismic isolation sphere mixture dropping cylinder hole, and the lower end flange lower surface of the cylindrical support column. The appropriate height and width of the seismic isolation ball fall stop plate made of a rigid plate of an appropriate size that can close the opening of each base isolation ball mixture drop cylinder The seismic isolation ball drop stop plate insertion opening is appropriately opened, and the base isolation ball drop stop plate is inserted into the base isolation ball drop stop plate insertion port.

Appropriate opening of the seismic isolation ball fall stop plate insertion opening allows the bottom end of the cylindrical support column in contact with the outer edge side of the seismic isolation ball mixture drop cylinder hole and the bottom surface of the flange to enter and exit the seismic isolation ball fall stop plate. Cut the width and height, or leave a space between the width and height, and insert and fix a packing plate matching the height between the upper surface of the remaining load support base and the lower surface of the flange. To obtain a slot for the base-ball drop stop plate.

By providing a seismic isolation ball fall stop plate, it is possible to store and store a plurality of seismic isolation balls and over-rolling sand particles in the seismic isolation ball mixture supply tank at all times. By inserting and placing the device until the installation is completed, the seismic isolation ball does not fall off and the workability is improved.

A fifth solution is to provide a plurality of sliding seismic isolation protrusions having a suitably small diameter and a semi-spherical upper end, which are appropriately lower than the ball height of the seismic isolation sphere, on the lower rolling plate surface In addition, the mutual separation that does not hinder the rolling isolation of the seismic isolation ball is maintained, and the upper ends of a plurality of appropriate sliding seismic isolation protrusions are in contact with the lower surface of the upper sliding / rolling plate, so that the upper load is evenly distributed. It is the structure which arrange | positions so that it can support and can carry out a seismic isolation, and adheres suitably.

The height of the sliding seismic isolation protrusion, which is appropriately lower than the height of the base isolation sphere, is a low height that prevents the sliding and rolling plate from colliding with the sliding base isolation protrusion during rolling isolation on the base isolation sphere. In the unlikely event that there is no seismic isolation ball between the plane of the lower rolling plate and the upper sliding / rolling plate, the upper sliding / rolling plate slides on the sliding seismic isolation projection and is isolated. It is a height that can be easily transferred without hindrance when moving on the lower support pillar of the same height.

Appropriate fixation of the sliding seismic isolation protrusion on the lower rolling plate surface is achieved by bonding or welding the lower end side of the semi-spherical sliding seismic isolation projection to the lower rolling plate surface, or on the lower rolling plate. A screw may be attached. Further, the lower rolling plate and the sliding seismic isolation protrusion can be integrally formed and used.

If a seismic isolation ball is not present between the lower sliding plate plane and the upper sliding / rolling plate in the event of an earthquake motion, the upper sliding / rolling plate will not slip. When sliding on the seismic protrusion and further moving onto the lower support column, which is the same height as the ball of the seismic isolation ball, the upper sliding and rolling plate easily rides without colliding with the lower support column. Can be isolated without any problems.

In the seismic isolation bearing device according to the first solving means configured as described above, the entire lower surface of the load supporting base plate is converted into a sliding and rolling plate by providing the sliding and rolling plate on the outer peripheral edge, and a light structure, etc. The upper load of the upper-sliding and rolling plate of the entire lower surface of the load support base and the load is not concentrated on only a part of the load support base with a small area between the plurality of base-isolated sphere mixture dropping cylinder holes. The outer peripheral upper sliding and rolling plate can be dispersed and supported. It is not necessary to increase the thickness of the load support base.

Further, the non-use surface of the lower surface of the load support base plate 3 is enabled as the sliding / rolling plate 24 on the outer peripheral edge without increasing the diameter of the cylindrical support column, and thus the area of the sliding and rolling is widened. By increasing the width, the number of contacts between the base isolation ball and the rolling plate increases during the base isolation, and the base isolation ball can support the upper load more and can perform stable base isolation.

In addition, by forming a sliding support column mechanism with a non-loading horizontal bottom surface on the outer peripheral edge above the sliding and rolling plate, the sliding between the outer peripheral upper sliding and rolling plate and the cylindrical lower support column group is formed. Seismic isolation balls cannot exist, and the upper load is stably supported by preventing sliding due to strong winds by sliding friction resistance force between the outer peripheral upper sliding and rolling plate lower surface and the cylindrical lower support column group at normal times. And can be supported by a cylindrical lower support column.

In the seismic isolation bearing device according to the second solving means configured as described above, by providing an appropriate number of central support columns having an appropriate shape, the upper load of a light structure or the like is efficiently distributed to the central support columns. In addition, the upper sliding and rolling plate can be supported in an unbalanced manner by supporting the upper load, and the lower supporting column and the seismic isolation ball can be supported evenly.

In the seismic isolation bearing device according to the third solving means configured as described above, a small number of seismic isolation ball heights and lower support column heights are applied to the upper load of a light structure or the like in normal times. Both the seismic ball and the number of cylindrical lower support pillars that can hold strong wind-resistant anti-sliding frictional resistance share and support, and hold anti-strong wind-resistant anti-slip frictional resistance. .

At the time of earthquake motion, a small number of seismic isolation spheres on the rolling plate surface for reducing sliding friction roll to start sliding and rolling seismic isolation in response to the seismic motion of smaller horizontal seismic force, The outer peripheral upper sliding / rolling plate and the upper sliding / rolling plate can be easily transferred onto the seismic isolation ball. In addition, even during horizontal displacement, the difference in frictional resistance between sliding / rolling friction and rolling friction is reduced, and the moment at which a transition from rolling isolation to a cylindrical lower support column is reduced. In addition, the adverse effects of shock and seismic attenuation reduction on light structures will decrease.

In the seismic isolation bearing device according to the fourth solving means configured as described above, by providing a seismic isolation ball falling stop plate, a plurality of seismic isolation balls and over-rolling suppression sand particles are mixed. The seismic isolation ball can be stored and stored in the body supply tank at all times, and the seismic isolation ball does not fall off by inserting until the installation of the seismic isolation bearing device is completed.

In the seismic isolation bearing device according to the fifth solving means configured as described above, the height of the sliding seismic isolation protrusion is set to be appropriately lower than the ball height of the seismic isolation sphere, and is fixed on the lower rolling plate. Therefore, if there is no seismic isolation ball on the lower rolling plate plane and the upper sliding / rolling plate in the unlikely event of an earthquake motion, The rolling plate can slide on the sliding seismic isolation protrusion, and can easily get on the lower support column with the same height as the ball of the seismic isolation ball without hindrance, and can slide on both sides without hindrance. it can.

(A) The longitudinal cross-sectional view of the seismic isolation bearing apparatus K which concerns on Embodiment 1. FIG. (B) The enlarged plane sectional view of the ZZ section of Drawing 1a. (c) An enlarged vertical sectional view of a part of the solid line circle P in FIG. 1a. (A) The longitudinal cross-sectional view of the seismic isolation bearing apparatus L which concerns on Embodiment 2. FIG. (B) Enlarged longitudinal sectional view showing the position of the sliding friction reducing rolling plate surface in the solid line great circle G of FIG. 2a. (c) The plane sectional view of an example which shows the position and range of the rolling plate surface for sliding friction reduction of the QQ part of 2b. (A) An enlarged vertical sectional view of a part of the seismic isolation bearing device S according to the third embodiment. (B) The base isolation ball drop stop plate is inserted into the base isolation ball drop stop plate opening opened between the upper surface of the load support base of the RR portion in FIG. 3a and the lower surface of the lower end flange of the cylindrical support column. Explanatory plane sectional view of the inserted state. (c) Explanatory plan view of the state where the seismic isolation ball falling stop plate of FIG. (A) The state explanatory top view which has arrange | positioned several sliding seismic isolation protrusion of the seismic isolation bearing apparatus T which concerns on Embodiment 4 on the lower rolling plate surface. (B) State explanatory plan view of the plurality of sliding base isolation protrusions and the plurality of base isolation balls in FIG. (c) The expanded longitudinal cross-sectional view of the UU part of FIG. 4b.

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 spheres, the crossed central circles indicate cylindrical lower support pillars, the double circles indicate sliding isolation bases, Nakadaimaru with a horizontal dotted line indicates the plane position and range of the rolling plate surface for reducing sliding friction. Throughout the drawings, the same components are denoted by the same reference numerals.

(First Embodiment) If the seismic isolation bearing device K is described with reference to FIG. 1, the bottom surface of the load supporting base 3 that contacts the outer periphery of the upper sliding / rolling plate 4 is placed horizontally on the upper sliding / rolling plate 4. The upper surface of the load supporting base plate 3 is formed as a sliding and rolling plate 24 on the outer peripheral edge of the same plane that is continuous with the lower surface, and further serves as the bottom plate surface of the base-isolated ball mixture supply tank 14 in the cylindrical support column 10. A suitable number of central support pillars 25 of an appropriate shape made of a rigid body are disposed between the bottom surface of the mounting plate 11 and the bottom surface of the mounting plate 11, and both ends of the central supporting column 25 are in contact with the top surface of the load support base 3 and the bottom surface of the mounting plate 11. Then, the central support column 25 is appropriately supported and fixed to the inner surface side of the seismic isolation sphere mixture supply tank 14.

Further, a rigid body having a height equal to the diameter value of the seismic isolation sphere 7 on an appropriate circular range within the projected circular range on the lower rolling plate 2 surface projected by the sliding and rolling plate 24 on the outer peripheral edge. A plurality of cylindrical lower support pillars 8 having appropriate diameters are arranged at positions where the lower support pillars 8 are spaced apart from each other so that the seismic isolation sphere 7 can freely roll, and the upper load is evenly supported. Then, the lower end is fixed on the lower rolling plate 2 surface, and the top of the seismic isolation ball 7 is excised to an appropriate depth that does not contact the lower surface of the rolling and rolling plate 4 except for the fixed lower support column 8. , With a non-loading horizontal bottom surface integrated with the sliding support column mechanism unit D, which has a base-free horizontal bottom surface 9 with a base-isolating ball and a sliding base 4 with a base-free horizontal bottom surface on the upper sliding and rolling plate 4 The sliding support column mechanism unit D is assumed.

Appropriate inclined surface that allows the lower peripheral edge 26 to easily ride on the lower support column 8 and the seismic isolation ball 7 without any trouble when the horizontal displacement is applied. It is good to do. Further, the lower support column 8 located closest to the outer circle periphery of the seismic isolation ball no-load horizontal bottom surface 9 may have an appropriate inclined surface on the outer edge side for the same reason. Furthermore, if the bottom end cylindrical hole opening of the base isolation ball mixture dropping cylinder hole 15 is formed on an appropriate inclined surface, the base isolation ball 7 can easily drop onto the lower rolling plate 2 surface.

The central support column 25 needs an appropriate shape and number made of a rigid body capable of supporting the upper load on the load support base 3, and is suitable for use with a steel material. The shape may be appropriate, and the number is used as little as possible. Therefore, it is preferable not to reduce the storage amount of the seismic isolation ball 7 and the excessive rolling suppression sand granule 16 as much as possible. FIG. 1 shows an example in which a single round steel bar is erected at the center of the base-isolated ball mixture supply tank 14. Further, the convenience of maintenance management such as replacement of the load support base 3 is improved by merely bringing both ends into contact with the upper surface of the load support base 3 and the lower surface of the mounting plate 11 without being fixed. The central support column 25 may be suitably fixed and supported on the inner tank wall of the seismic isolation sphere mixture supply tank 14 by using an appropriate support material.

Explaining the enlarged vertical sectional view in the solid line great circle P in FIG. 1c, the base-free horizontal bottom surface 9 is formed on the lower surface of the outer peripheral upper sliding / rolling plate 24, and the upper sliding / rolling plate 4 lower surface is isolated. The sliding support column mechanism unit D with the ball-unloaded horizontal bottom surface and the sliding support column mechanism unit D with the seismic isolation ball-unloaded horizontal bottom surface 9 are integrated. The plate 4 and the outer peripheral upper sliding / rolling plate 24 abut against and support the lower support column 8.

By providing the outer peripheral upper sliding / rolling plate 24, the entire lower surface of the load supporting base plate 3 is converted into an upper sliding / rolling plate, and the upper load of the light structure or the like is caused by the plurality of seismic isolation ball mixture dropping cylinder holes 15. The load is not concentrated on only a part of the load support base 3 having a small area between them, and the upper slide / rolling plate 4 and the outer peripheral upper slide / rolling plate 24 on the lower surface of the entire load support base 3 are dispersed. Can be supported.

Further, the non-use surface on the lower surface of the load support base 3 is made effective as the sliding / rolling plate 24 on the outer peripheral edge without increasing the diameter of the cylindrical support column 10, so that the area of sliding and rolling is widened. As a result of the widening, the number of contacts of the seismic isolation ball 7 with the upper sliding and rolling plate 4 and the lower rolling plate 2 at the time of rolling isolation is increased, and the seismic isolation ball 7 supports the upper load more in many points. Stable rolling isolation.

Furthermore, the upper load of a light structure or the like is efficiently distributed to the central support column 25, and the upper load is eliminated from being supported by the upper sliding / rolling plate 4 in an unbalanced manner. 7 can be evenly supported.

Note that the central support column 25 can efficiently support the upper load by using the central support column 25 in an upright manner in the seismic isolation sphere mixture supply tank 14 in the cylindrical support column 10. Therefore, a short cylindrical ring having an inner diameter that fits the outer diameter of the cylindrical support column 10 is welded to the entire outer peripheral edge of the load support base 3 to form a concave lid-shaped load support base, and the cylindrical support column. 10 can be used by being screwed onto the outer cylinder wall of the cylindrical support column 10 so as to cover the lower end side of the cylindrical support column 10 so that the lower end side of the tube 10 comes into contact with the upper surface of the load support base 3. In addition, a load supporting base 3 having the same diameter as the outer diameter of the cylindrical supporting column 10 is directly welded to the lower end side of the cylindrical supporting column 10 to form a cylindrical supporting column with a bottomed cylindrical load supporting base. It can also be used.

(Second Embodiment) Explaining the seismic isolation bearing device L with reference to FIG. 2, the seismic isolation ball unloaded horizontal bottom surface 9 is provided with an appropriate singular or plural positions of the cylindrical lower support pillar 8 sides. The lower rolling plate 2 returned to the height of the lower rolling plate 2 plane before the excision within the range in which the seismic ball unloaded horizontal bottom surface 9 can be put on an appropriate small number of seismic isolation balls 7. A small number of seismic isolation spheres 7 are placed on the height surface, and the top of the seismic isolation sphere 7 can be brought into contact with the bottom surface of the upper sliding and rolling plate 4 to provide a sliding plate 27 for reducing sliding friction. .

The reason why an appropriate small number of seismic isolation balls 7 are required is that a large number of sliding friction reduction rolling plate surfaces 27 on which a large number of seismic isolation balls 7 can be mounted are provided. When the seismic isolation ball 7 rides on and rolls, the rolling friction exceeds the sliding friction, and the sliding friction resistance decreases too much, so that the upper sliding / rolling plate 4 and the cylindrical lower support column 8 in normal times. It is impossible to obtain a sliding friction resistance force that prevents strong wind fluctuations. Therefore, after securing the number of cylindrical lower support pillars 8 capable of obtaining a strong wind swaying prevention sliding friction resistance force, the surplus sliding friction resistance force can be reduced, and a small number of them can be reduced at one position. The rolling plate surface 27 for reducing sliding friction with a small area on which the seismic isolation ball 7 can ride is required.

The position of the rolling plate surface 27 for reducing the sliding friction in the QQ part of FIG. 2b will be described with reference to the reduced sectional plan view of FIG. Among the cylindrical lower support pillars 8 arranged on the surface of the support board 5, several peripherals centering on one cylindrical lower support pillar 8 out of four places capable of evenly supporting the upper load. Rolling plate surface for reducing sliding friction in a small area, on which a small number of seismic isolation spheres 7 can ride by returning the space between the columnar lower support columns 8 to the level of the lower rolling plate 2 before the cutting. 27 (indicated by a medium large circle with a horizontal dotted line) is obtained.

Although the appropriate number of positions is shown in the above-mentioned figure at four locations, it may be increased or decreased as appropriate, and may be used at a single position. A few seismic isolation spheres 7 are used by appropriately selecting the number of positions and positions that can effectively support the upper load. Further, in the above figure, the space between several cylindrical lower support columns 8 around a single cylindrical lower support column 8 is shown as a rolling plate surface 27 for reducing sliding friction with a small area. Only the space between the columnar lower support columns 8 may be appropriately increased or decreased.

Maintains the upper load of light structures, etc. under normal conditions, with a few seismic isolation spheres 7 and high wind-resistant anti-sliding sliding frictional resistance where the base isolation sphere 7 height and the lower support column 8 height are the same height. Both the number of columnar lower support pillars 8 that can be shared and supported.

During the earthquake motion, a small number of seismic isolation balls 7 on the sliding friction reducing rolling plate surface 27 on a small area roll into the seismic isolation ball unloaded horizontal bottom surface 9 and the lower rolling plate 2. Pushed by the rolling motion of the seismic isolation ball 7 on the surface, the seismic isolation ball 7 rides on the rolling plate surface 27 for reducing sliding friction one after another and rolls into the no-load horizontal bottom surface 9 of the seismic isolation ball. By doing so, it becomes possible to start the sliding and rolling seismic isolation operation in response to the seismic motion of a smaller horizontal seismic force, and the outer edge upper sliding and rolling plate 24 and the upper sliding and rolling plate 4 are easy. It is possible to move on the seismic isolation ball 7. Further, even at the time of full amplitude horizontal displacement, the difference in frictional resistance between the sliding and rolling friction and the rolling friction is reduced, and the moment of transition from the rolling isolation to the cylindrical lower support column 8 is shocked. Will be reduced, and the adverse effects of shocks and reduced seismic vibration damping on light structures will be reduced.

As another means for reducing the sliding friction resistance between the upper sliding / rolling plate 4 and the cylindrical lower support column 8, the upper sliding / rolling plate 4 and the cylindrical lower support column 8 are made of a smoother material. As a matter of course, a material having a low friction coefficient can be used to form both or one of the above, or a material having a low friction coefficient can be reduced by plating or coating.

Rolling frictional resistance is much smaller than sliding frictional resistance, using rolling plate surface 27 for reducing sliding friction, effectively using rolling seismic isolation, and appropriately using a material with a small friction coefficient. You can also The over rolling suppression sand granule 16 acts to increase the sliding friction resistance, and wears the coated or coated material having a small friction coefficient more quickly.

(Third Embodiment) Explaining the seismic isolation bearing device S with reference to FIG. 3, the base isolation surface 14 in the base isolation ball mixture supply tank 14 is opened, and the base isolation ball mixture drop cylinder hole 15 is opened. A rigid plate of an appropriate size that can close each of the 15 seismic isolation sphere mixture drop cylinder holes 15 between the upper surface of the load support base 3 and the lower surface of the lower end flange 28 of the cylindrical support column 10. The seismic isolation ball drop stop plate insertion opening 30 having an appropriate gap height and width that allows the base isolation ball fall stop plate 29 to enter and exit is appropriately opened. A seismic ball falling stop plate 29 is inserted and provided.

The seismic isolation ball drop stop plate insertion opening 30 enters and exits the base isolation ball drop stop plate 29 through the lower end of the cylindrical support column 10 that contacts the outer edge of the base isolation ball mixture drop cylinder hole 15 and the lower surface of the flange 28. It is good to excise and open the width and height to make it free.

Further, a space between the width and the height is secured, and a packing plate matching the height is inserted and fixed between the upper surface of the remaining load supporting base 3 and the lower surface of the flange 28 to prevent the seismic isolation ball from falling. A plate insertion opening 30 can also be obtained. It is good to use with opening appropriately.

The seismic isolation ball falling stop plate 29 is composed of the base isolation ball 7 stored in the base isolation ball mixture supply tank 14 on the base isolation ball mixture drop cylinder hole 15 and the sand granule 16 for suppressing overrolling. A steel plate, a light metal plate, a synthetic resin plate, or the like having a strength that does not fall off from the body dropping cylinder hole 15 is appropriately selected and used.

By providing the seismic isolation ball falling stop plate 29, the seismic isolation ball 7 and the excessive rolling suppression sand granule 16 can be stored and placed in the seismic isolation ball mixture supply tank 14 at all times. By inserting and placing until the installation of the seismic support device is completed, the seismic isolation ball 7 and the over-rolling suppression sand granule 16 do not fall off and workability is improved.

In addition, when the central support column 25 is provided in the seismic isolation sphere mixture supply tank 14, the storage amount of the seismic isolation sphere 7 and the excessive rolling suppression sand granule 16 is considered to be insufficient, or the cylindrical support column 10. In the case where it is desired to use a smaller diameter, the upper sliding / rolling plate 4 and the outer peripheral upper sliding / rolling plate 24 are placed on the cylindrical lower support column 8 and after the placement. The seismic isolation ball 7 and the excessive rolling suppression sand granule 16 are manually added in an appropriate amount within an appropriate circular range on the surface of the lower rolling plate 2 including the inside of the no-load horizontal bottom surface 9 of the base isolation ball. It can be used by arranging.

Furthermore, when the seismic isolation ball drop stopper plate 29 is pulled out from the base isolation ball drop stopper plate insertion port 30 when the base isolation bearing device is installed, several types of base isolation ball drop holes with different drop hole diameters are provided. Prepare the base-isolated ball drop hole with the appropriate drop hole diameter so that the base-isolated ball drop hole of the base-isolated ball drop hole plate overlaps the base-isolated ball mixture drop cylinder hole 15 of the load support base 3. By inserting and using a plate with a hole in the seismic isolation ball drop stop plate insertion port 30, the amount of fall of the seismic isolation ball can be appropriately adjusted and used.

(Fourth Embodiment) The seismic isolation bearing device T will be described with reference to FIG. 4. The base height of the seismic isolation sphere 7 is appropriately lower than that of the seismic isolation sphere 7, and the upper end has a semi-spherical shape with an appropriate small diameter made of a rigid body. A plurality of sliding seismic isolation protrusions 31 are provided, and a mutual spacing that does not hinder rolling isolation of the seismic isolation ball 7 is maintained on the surface of the lower rolling plate 2, and an appropriate amount is provided on the lower surface of the upper sliding and rolling plate 4. The upper ends of the plurality of sliding seismic isolation protrusions 31 are in contact with each other so that the upper load can be evenly supported, and are fixed appropriately.

The height of the sliding seismic isolation protrusion 31 that is appropriately lower than the ball height of the seismic isolation sphere 7 is a low height that does not collide with the sliding seismic isolation protrusion 31 while the upper sliding / rolling plate 4 is rolling on the base isolation ball 7 In addition, in the unlikely event that there is no seismic isolation ball between the lower rolling plate plane and the upper sliding and rolling plate, the upper sliding and rolling plate slides on the sliding seismic isolation projection, It is a height that can be easily transferred without any trouble when moving on the lower support column of the same height as the baseball.

The appropriate small diameter is a small diameter that allows a number of seismic isolation spheres 7 to come into contact with the lower surface of the upper sliding / rolling plate 4 so as to be capable of rolling isolation, and the upper ends of the plurality of sliding isolation base protrusions 31. Is an appropriate small diameter that falls within a range where it can abut against the lower surface of the upper-sliding / rolling plate 4 and can support the upper load evenly and can be isolated from the slip.

The seismic isolation protrusion 31 having a semispherical upper end with an appropriate diameter is required to be a rigid body that can support the upper load and the upper sliding and rolling plate 4 can be subjected to sliding isolation, and has a small friction coefficient. .

In the case where the material of the lower rolling plate 2 that is fixedly used is made of steel, the lower rolling plate surface 2 is made of steel, the lower end side is formed in an appropriate shape, and the lower end side of the sliding seismic isolation protrusion 31 is formed. Further, it may be appropriately bonded or welded, or may be screwed to the lower rolling plate 2 or the like. Furthermore, the sliding seismic isolation protrusion 31 and the lower rolling plate 2 can be formed by press molding integrally, or can be integrally molded by other appropriate molding methods. A material having a small friction coefficient may be used by coating or the like.

In the case of the lower rolling plate 2 made of another material, the sliding seismic isolation protrusion 31 made of an optimum material is used correspondingly, or is integrally formed by a forming method.

If there is no seismic isolation ball 7 between the lower rolling plate 2 and the upper sliding / rolling plate 4 in the event of an earthquake motion, the upper sliding / rolling plate 4 slides on the sliding isolation protrusion 31. It is possible to perform seismic isolation and to easily get on the columnar lower support column 8 having the same height as the ball of the base isolation ball 7 without any trouble, and to perform sliding seismic isolation on both sides without any trouble.

Any configuration other than those described above may be used as long as it does not depart from the gist of the present invention.

K Seismic isolation support device according to the first embodiment.
L Seismic isolation bearing device according to the second embodiment.
S Seismic isolation device according to the third embodiment.
T Seismic isolation bearing device according to the fourth embodiment.
D Sliding support column mechanism unit with a seismic isolation ball unloaded horizontal bottom.
P Solid line great circle.
G Solid line great circle.
2 Lower rolling plate.
3 Load support base.
4 Sliding and rolling plate.
7 Seismic isolation ball.
8 Columnar lower support column.
9 Seismic isolation ball no-load horizontal bottom.
10 Cylindrical support column.
11 Mounting plate.
14 Seismic isolation ball mixture supply tank.
15 Seismic isolation ball mixture drop cylinder hole.
16 Sand granule for excessive rolling suppression.
24 Sliding and rolling plate on outer periphery.
25 Center support column.
26 Full outer periphery at the lower end.
27 Rolling plate surface for reducing sliding friction.
28 Bottom flange.
29 Seismic isolation ball falling stop plate.
30 Seismic isolation ball drop stop plate insertion slot.
31 Sliding seismic isolation protrusion.

Claims (5)

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. Appropriate shape of the seismic isolation ball mixture drop cylinder holes at equal intervals so as to surround the outer periphery of the upper sliding / rolling plate between the upper surface of the load support platform and 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. In the seismic isolation bearing device, in which a mixture in which sand particles for suppressing overrolling are mixed in an appropriate amount ratio is stored in a plurality,
The lower surface of the load support base contacting the outer peripheral edge of the upper sliding / rolling plate is formed as an outer peripheral upper sliding / rolling plate on the same plane that is continuous with the horizontal lower surface of the upper sliding / rolling plate. An appropriate diameter circle made of a rigid body having a height equal to the diameter value of the seismic isolation sphere on the lower circular plate surface on the lower rolling plate surface projected by the upper sliding and rolling plate. The columnar lower support pillars are spaced apart from each other so that the seismic isolation balls can roll freely, and the lower ends are on the lower rolling plate surface at positions where the upper load is evenly supported. Except for the fixed lower support pillar, the top of the seismic isolation ball is cut to an appropriate depth so that the top of the seismic isolation sphere does not contact the upper sliding and lower surface of the rolling plate. A seismic isolation bearing device, characterized by forming a sliding support column mechanism having a horizontal bottom surface with no seismic isolation ball. An appropriate number of central support columns made of a rigid body are arranged between the upper surface of the load support base plate and the lower surface of the mounting plate, which will be the bottom plate surface of the seismic isolation sphere mixture supply tank in the cylindrical support column. The both ends are set up in contact with the upper surface of the load support base and the lower surface of the mounting plate, and the central support column is appropriately supported and fixed to the inner surface side of the seismic isolation sphere mixture supply tank. The seismic isolation bearing device according to Item 1. Excise the height of the bottom surface of the lower support pillar at the appropriate single or multiple positions within the horizontal bottom surface of the base-free ball without load within the range where a small number of base-isolated balls can ride. Return to the previous lower rolling plate plane height, and a small number of appropriate seismic isolation balls ride on the returned lower rolling plate surface, and the top of the base isolation ball comes into contact with the upper sliding and lower surface of the rolling plate. The seismic isolation bearing device according to claim 1, wherein the seismic isolation bearing device is a rolling plate surface for reducing sliding friction. Between the upper surface of the load support base plate, which is the bottom plate surface in the seismic isolation ball mixture supply tank, with the opening of the seismic isolation ball mixture dropping cylinder hole, and the lower surface of the lower end flange of the cylindrical support column, Seismic isolation ball drop stopper with appropriate gap height and width that allows the base isolation ball falling stopper plate made of a rigid plate of appropriate width to be able to block the opening of the base isolation ball mixture drop cylinder hole. The plate insertion opening is appropriately opened, and the seismic isolation ball drop stop plate is inserted into the base isolation ball drop stop plate insertion port, respectively. Seismic isolation device. Provide a plurality of sliding seismic isolation protrusions with an appropriately small diameter and a semi-spherical upper end, which is appropriately lower than the ball height of the base isolation ball, and the base isolation ball rolls on the lower rolling plate surface. An arrangement is made so that the upper load can be evenly supported by maintaining the mutual spacing that does not hinder the dynamic isolation, and the upper ends of a plurality of appropriate sliding isolation protrusions coming into contact with the lower surface of the upper sliding / rolling plate. The seismic isolation bearing device according to any one of claims 1 to 4, wherein the seismic isolation device is installed and appropriately fixed.

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