JPH10169710A - Base isolation device for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the smooth and horizontal movement of a linear movement mechanism even if heavy weight is loaded, to increase load supporting capacity, by interposing many rollers between the upper surface of an X guide rail and a linear movement mechanism, also the lower surface of a Y guide rail and the linear movement mechanism. SOLUTION: The load of a structure is loaded onto a base via an upper plate 2, a Y guide rail fitting plate 5, a Y guide rail 6, a roller, a linear movement mechanism 9, a roller, an X guide rail 4, an X guide rail fitting plate 3, and a lower plate 1. Here when the upper plate 2 makes horizontally directional displacement in an X direction to the lower plate 1, the upper plate 2, together with the rail 6 and the mechanism 9, moves along the X guide rail 4. When the upper plate 2 makes horizontally directional movement in a Y direction, the upper plate 2, together with the rail 6, moves to the mechanism 9. In any case, the respective rollers movably rotate while contacting the upper surface of the rail 4 and the lower surface of the rail 6, the respective bearings movably rotate along the grooves of the rails 4 and 6 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device for protecting a structure such as a building from vibration such as an earthquake.

[0002]

2. Description of the Related Art Conventional seismic isolation devices generally include an elastic body provided between a foundation and a structure, and a vibration damping device and a structure restoring device in addition to the elastic body. Used in

[0003]

However, in the conventional seismic isolation device, the pull-out resistance for preventing the upward displacement of the structure is small, and the load bearing force, rigidity and horizontal deformation capacity per one seismic isolation device are required. There is a problem in that there is a limit in the setting of the parameters, and these performances interfere with each other, so that a large performance change cannot be made individually.

The present invention solves such a problem, has a large pull-out resistance, a load bearing force, a rigidity and a horizontal deformation ability, and can set a restoring force and a damping force independently without interfering with each other. It is an object of the present invention to provide a seismic isolation device as described above.

[0005]

According to the present invention, there is provided a rolling device for horizontally moving a load between a lower plate and an upper plate, a restoring device for restoring the horizontal movement, and a damping device for attenuating the horizontal movement. A seismic isolation device for a structure, comprising: And
The present invention also provides a linear X guide rail having a continuous groove on the side surface and fixed to the upper surface of the lower plate, and an upper plate having a continuous groove on the side surface in a direction orthogonal to the X guide rail. A linear movement mechanism fixed to the lower surface of the X guide rail; a lower portion sandwiching the X guide rail movably from above, and an upper portion sandwiching the Y guide rail movably from below; A number of rollers interposed between the upper surface of the X guide rail and the linear motion mechanism, and between the lower surface of the Y guide rail and the linear motion mechanism, between the groove on the side of the X guide rail and the linear motion mechanism, and A rolling device consisting of a number of balls inserted between a groove on the side surface of the Y guide rail and the linear motion mechanism, and a restoration device consisting of a coil spring mounted between the lower surface of the upper plate and the upper surface of the lower plate. Equipment and oil dan Or it relates to a seismic isolation device characterized by comprising a damping device comprising a shock absorber. It is good that the above upper guide rail has multiple sections,
At least one restoration device and at least one damping device are required.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional plan view of an example of the embodiment of the present invention viewed from II in FIG. 3, and FIG. 2 is a cross-sectional view of an example of the embodiment of the present invention viewed from II-II in FIG. FIG. 3 is a plan view, and FIG. 3 is a front view of FIG. 1. An upper plate 2 is disposed above a lower plate 1, and the lower plate 1 and the upper plate 2 are made of a flat plate and have substantially the same shape. In the illustrated embodiment, the lower plate 1 and the upper plate 2 are octagonal, but they may be formed in a square or a circle.

On the upper surface of the lower plate 1, an X guide rail mounting plate 3
, Two X guide rails 4 are fixed in parallel in the left-right direction in the figure. In the illustrated embodiment, the number of the X guide rails 4 is two, but three or more parallel X guide rails 4 are provided.
Alternatively, one X guide rail 4 fixed so as to cross substantially the center of the upper surface of the lower plate 1 may be used.

On the lower surface of the upper plate 2, a Y guide rail mounting plate 5 is provided.
Two Y guide rails 6 are fixed to each other via the X guide rail 4 (see FIG. 3) in a direction perpendicular to the X guide rail 4. Although two X guide rails 6 are used in the illustrated embodiment, three or more parallel Y guide rails 6 may be used, or one Y guide rail fixed so as to cross substantially the center of the lower surface of the upper plate 2. The guide rail 6 may be used.

A continuous groove 7 is provided on both sides of the X guide rail 4 as shown in FIG. 5, and a continuous groove 8 is also provided on both sides of the Y guide rail 6. I have.
And, between the X guide rail 4 and the Y guide rail 6, X
A linear motion mechanism 9 that movably sandwiches the guide rail 4 and the Y guide rail 6 is provided.

As shown in FIGS. 1 to 4, the linear motion mechanism 9 is formed by integrally combining an X linear motion mechanism 10 and a Y linear motion mechanism 11, and the X linear motion mechanism 10 is an X linear motion mechanism.
The guide rail 4 is movably sandwiched from above, and the Y linear motion mechanism 11 is configured to sandwich the Y guide rail 6 movably from below.

As shown in FIG. 5, the X linear motion mechanism 10 is provided with a number of rollers 12 interposed between the upper surface of the X guide rail 4 and the X linear motion mechanism 10. Can be circulated while rolling while passing from the upper surface of the X guide rail 4 through a roller circulation path 13 formed in the X linear motion mechanism 10 in a vertically long and oblong oblong shape.

Further, the X guide rail 4 of the X linear motion mechanism 10
A large number of bearings 14 are provided between a lower portion sandwiching the groove and grooves 7 provided continuously on both side surfaces of the X guide rail 4.
Can be circulated while rolling by passing through a bearing circulation path 15, which is formed in the lower part of the X linear motion mechanism 10 sandwiching the X guide rail 4 from the groove 7, and is formed in a horizontally-long oblong shape in a horizontal plane. , So that the X linear motion mechanism 10 does not come out above the X guide rail 4.

End seals 16 are attached to both end surfaces of the X linear motion mechanism 10, and the X guide rails 4 are provided.
From the lower lower surface of the X linear motion mechanism 10 sandwiching
A side seal 17 facing the side surface of the guide rail 4 is attached.

As shown in FIG. 4, the Y linear motion mechanism 11, which is integrally connected to the X linear motion mechanism 10, has turned the above-described X linear motion mechanism 10 upside down and turned 90 degrees horizontally. It has a configuration.

The Y linear motion mechanism 11 includes a Y guide rail 6
(See FIG. 3) Many rollers 1 interposed between the lower surface
8 (see FIG. 4), these rollers 18
Can be circulated while rolling while passing through a roller circulation path 19 formed in the Y linear motion mechanism 11 in a vertically long and oblong oval shape.

Further, the Y guide rail 6 of the Y linear motion mechanism 11
A large number of bearings 20 are provided between the upper portion sandwiching the groove and grooves 8 (see FIG. 5) provided continuously on both side surfaces of the Y guide rail 6. Can be circulated while rolling by passing through a bearing circulation path 21 which is formed in the upper part sandwiching the Y guide rail 6 of the Y linear motion mechanism 11 from the groove 8 and is formed in a horizontal plane and oblong in an oblong shape. To prevent the Y linear motion mechanism 11 from falling below the Y guide rail 6.

As shown in FIGS. 1 to 3, between the lower plate 1 and the upper plate 2, the X coil springs 22, the X oil dampers 23, and the ends of the Y guide rails 6 are located near and outside the X guide rails 4. A Y coil spring 24 and an X oil damper 25 are arranged near and outside.

Next, the operation of the above-described device will be described.

The lower plate 1 is fixed to a foundation, and the upper plate 2 (see FIG. 3) is fixed to the lower side of a structure such as a building. Thereby, the load of the structure is limited to the upper plate 2, the Y guide rail mounting plate 5, the Y guide rail 6, the roller 18 (see FIG. 4), the linear motion mechanism 9, the roller 12 (see FIG. 5), the X guide rail 4, Through the X guide rail mounting plate 3 (see FIGS. 1 to 3) and the lower plate 1,
Will be loaded on the foundation.

When the upper plate 2 is displaced horizontally relative to the lower plate 1 in the left and right X directions in FIG. 1, the upper plate 2 is provided with a Y guide rail 6 and a linear motion mechanism as shown in FIGS. With 9, it moves along the X guide rail 4. At this time, the roller 12 (see FIG. 5) rolls while being in contact with the upper surface of the X guide rail 4, and the bearing 14 rolls along the groove 7 of the X guide rail 4.

When the upper plate 2 is displaced horizontally relative to the lower plate 1 in the Y direction in FIG. 1, the upper plate 2 moves together with the Y guide rail 6 with respect to the linear motion mechanism 9. At this time, the roller 18 (see FIG. 4) rolls while contacting the lower surface of the Y guide rail 6, and the bearing 20
It rolls along the groove 8 of the guide rail 6 (see FIG. 5).

As described above, when the upper plate 2 is displaced in the horizontal direction between the lower plate 1 and the middle between the X direction and the Y direction, the linear motion mechanism 9 is moved between the X guide rail 4 and the Y guide rail 6. Since the rollers 12 and 18 are interposed, the upper plate 2 can move smoothly even when the weight of the structure loaded on the upper plate 2 is extremely heavy.

If the lengths of the X guide rail 4 and the Y guide rail 6 are set to be long, it is possible to provide a large horizontal displacement capability.

When the upper plate 2 is displaced in the horizontal direction with respect to the lower plate 1, the upper ends of the X coil springs 22 and the X oil dampers 23 move and deform together with the upper plate 2 as shown in FIG. 2, a restoring force and a damping force are applied.

When an upward force, ie, a pulling force, is applied to the upper plate 2, the linear motion mechanism 9 is located between the groove 7 on the side of the X guide rail 4 and the groove 8 on the side of the Y guide rail 6. Since a large number of balls 14 and 20 interposed prevent the upward movement of the Y guide rail 6 and the linear motion mechanism 9,
A large pull-out resistance will result.

[0027]

According to the present invention, since a large number of rollers are interposed between the upper surface of the X guide rail and the linear motion mechanism and between the lower surface of the Y guide rail and the linear motion mechanism, an extremely large weight is applied. Even if a load is applied, horizontal movement can be performed smoothly, and there is an effect that the load bearing capacity is large.

Also, a large number of bearings interposed between the groove on the side of the X guide rail and the groove on the side of the Y guide rail and the linear motion mechanism prevent the Y guide rail and the linear motion mechanism from moving upward. This has the effect of producing a large pull-out resistance.

Further, the load bearing capacity, pull-out resistance, horizontal deformation capacity, restoring force, and damping force required for the seismic isolation device can be set independently of each other. Particularly important load-bearing capacity, pull-out resistance, and horizontal deformation capacity are important. There is an effect that can be increased.

Further, since all the constituent members are incorporated and unitized between the lower plate and the upper plate, the number of installations can be appropriately increased or decreased according to the conditions of the structure.
There is an effect that the construction is easy and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of an example of an embodiment of the present invention as viewed from the line II in FIG.

FIG. 2 is a cross-sectional plan view of an example of the embodiment of the present invention as viewed from II-II in FIG.

FIG. 3 is a front view of an example of the embodiment of the present invention.

FIG. 4 is a perspective view showing an example of an embodiment of a linear motion mechanism.

FIG. 5 is a partial perspective view showing a part of the linear motion mechanism cut away.

FIG. 6 is a cross-sectional plan view showing an operation state of the embodiment of the present invention.

FIG. 7 is a front view of FIG. 6;

[Explanation of symbols]

 Reference Signs List 1 lower plate 2 upper plate 4 X guide rail 6 Y guide rail 7 groove (X rail) 8 groove (Y rail) 9 linear motion mechanism 12 roller 14 bearing 18 roller 20 bearing 22 X coil spring 23 X oil damper 24 Y coil spring 25 Y oil damper

Claims (2)

[Claims] 1. A structure comprising a rolling device for horizontally moving a load between a lower plate and an upper plate, a restoring device for returning the horizontal movement to its original state, and a damping device for attenuating the horizontal movement. For seismic isolation device. 2. A linear X guide rail having a continuous groove on a side surface and fixed to an upper surface of a lower plate, and an upper plate having a continuous groove on a side surface in a direction orthogonal to the X guide rail. A linear motion mechanism having a linear Y guide rail fixed to a lower surface, a lower portion sandwiching the X guide rail movably from above, and an upper portion sandwiching the Y guide rail movably from below; A large number of rollers interposed between the upper surface and the linear motion mechanism, between the lower surface of the Y guide rail and the linear motion mechanism, and between the groove on the side of the X guide rail and the linear motion mechanism; A rolling device consisting of a number of balls inserted between a groove on the side surface of the guide rail and a linear motion mechanism, and a restoring device consisting of a coil spring mounted between the lower surface of the upper plate and the upper surface of the lower plate. And oil damper Or a seismic isolation device comprising a damping device comprising a shock absorber.