JP4353341B2 - Seismic isolation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic isolation device that attenuates and absorbs vibration such as an earthquake transmitted from a floor slab of a building and protects a precise protected device that is vulnerable to vibration.
[0002]
[Prior art]
A conventional seismic isolation device will be outlined. The seismic isolation device protects various devices in the building against vibrations caused by an earthquake or the like. With recent changes in the communication environment, large-scale host computers, servers, and communication-related devices such as PBXs (indoor exchanges) that incorporate hard disks and optical disks in the seismic isolation devices of seismic isolation devices have also increased.
[0003]
A communication cable or the like is connected to the protected devices of these communication-related facilities. In this case, in many cases where the seismic isolation device is installed, the number of floors is increased to perform under-floor wiring, and an additional floor is often installed. Hereinafter, such an extension floor has already been added before the installation of the seismic isolation device, and is particularly referred to as an existing floor.
[0004]
When there is an existing floor, there are restrictions on the seismic isolation devices that can be used. For example, a seismic isolation device such as that described in JP-A-6-33583 is a seismic isolation device in which a thin sliding plate is disposed on a floor slab, and a sliding type or rolling type seismic isolation mechanism is disposed thereon. . In such a seismic isolation device, during the vibration, the seismic isolation frame, the support column, etc. of the seismic isolation mechanism vibrate in the horizontal direction, and a situation occurs in which the seismic isolation device comes into contact with the adjacent existing floor.
[0005]
The existing floor may be destroyed by the contact, or the protected device on the base isolation frame may be damaged by the impact of the contact. Therefore, it is necessary to separate the seismic isolation device from the existing floor to prevent contact, and it is necessary to provide a shock absorber in preparation for situations where the seismic isolation device and the existing floor contact or interfere with each other. The seismic device was restricted in installation when there was an existing floor.
[0006]
Moreover, in the seismic isolation device described in JP-A-6-33583, since a coil spring or the like is arranged outside, a large area is required for installation of the seismic isolation device, and the existing floor is not installed apart from the area. There was a problem that it should not be. There was a request to reduce the total area of the seismic isolation device.
[0007]
Further, when it is desired to be able to adjust the elastic force or damping force applied to the seismic isolation frame of the seismic isolation device, a coil spring or a damper is attached to the outside of the seismic isolation device as in the seismic isolation device described in JP-A-6-33583. From this point of view, there was a problem that the seismic isolation device and the existing floor had to be installed separately. When an adjustment mechanism for elastic force or damping force is involved, it is difficult to arrange a coil spring or a damper inside.
[0008]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems, and even when the seismic isolation device is disposed at a position where the existing floor with the increased floor surrounds the periphery, it is easy to adjust the elastic force or the damping force. The purpose is to provide a seismic isolation device that can be used in the state where the existing floor is adjacent to the surrounding area.
[0009]
[Means for Solving the Problems]
In order to solve the above problem, according to the seismic isolation device of claim 1,
A plurality of pillars erected on the floor slab;
A plurality of support portions respectively provided at tips of the plurality of struts;
A base-isolated base that is supported by the plurality of support parts so as to be movable in the horizontal direction;
Reinforcing brackets passed between the two struts,
A mounting bracket for attaching the reinforcing bracket to the column while moving vertically along the column and changing the mounting height of the reinforcing bracket,
An elastic member for imparting an elastic force to the base isolation frame;
A damping member for applying a damping force for damping the vibration of the base isolation frame;
It said elastic member Oyo connected with the seismic isolation mount the front Symbol damping member beauty, and a universal fitting for changing the mounting position by moving in the horizontal direction along the reinforcing metal fitting,
With
And adjusting said to grant the seismic isolation frame by changing the mounting position of the universal fitting elastic force and decrease衰力with changing the mounting height of the mounting bracket.
[0010]
Moreover, according to the seismic isolation device of claim 2,
The seismic isolation device according to claim 1,
Wherein the plurality of bearing is characterized by a plurality of balls der Rukoto.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the seismic isolation device of the present invention will be described. FIG. 1 is a side view showing the present embodiment, FIG. 2 is a plan view when the base is also removed, FIG. 3 is an explanatory view for explaining the mounting bracket and the reinforcing bracket, and FIGS. It is explanatory drawing of a metal fitting.
[0012]
In addition, in addition to the seismic isolation device of this embodiment, the existing floor 100 provided around the seismic isolation device is also illustrated in FIG. The existing floor 100 is expanded with floor posts 100a. Under the existing floor 100, for example, although not shown, a communication cable or the like is wired under the floor and connected by the protected device 2. .
[0013]
The seismic isolation device of the present embodiment includes an example of a base isolation rack 1, a sliding plate 3, a support column 4, a ball bearing 5, a ball 6 as an example of a support portion, a mounting bracket 7, a reinforcing bracket 8, a positioning bracket 9, and an example of an elastic member. Are provided with a coil spring 10, a damper 11 as an example of a damping member, and a universal bracket 12.
[0014]
The base isolation frame 1 is a flat plate formed in a substantially rectangular shape, and a protected device 2 is placed on the upper surface of the base isolation frame 1 as shown in FIG. The protected device 2 is fixed on the base isolation frame 1 by a fixing bracket (not shown) provided on the base isolation frame 1. Sliding plates 3 are attached to the four corners of the lower surface of the seismic isolation rack 1, respectively.
[0015]
On the other hand, a ball receiver 5 is provided at each end of the support column 4. The ball receiver 5 is in contact with the spherical surface of the ball 6 so that the ball 6 can rotate. The pillars 4 are respectively set directly below the sliding plates 3 at the four corners of the base isolation frame 1 so that the balls 6 are in contact with all of the sliding plates 3 attached to the four corners. These balls 6 are in contact with the sliding plate 3 to support the base isolation frame 1 and facilitate the horizontal movement of the base isolation frame 1. These balls 6 correspond to the support portion of the present invention. By comprising in this way, the seismic isolation stand 1 becomes movable in a horizontal direction.
[0016]
As shown in FIG. 3A, the mounting bracket 7 includes mounting brackets 7a and 7b and a screw 7c, and a hole is formed at the center when the mounting brackets 7a and 7b are assembled. When attaching the mounting bracket 7 to the column 4, it is possible to pass the column-shaped column 4 through the hole of the mounting bracket 7, move the mounting bracket 7 in the vertical direction, and fix it at the optimal mounting height. it can.
[0017]
At the same time that the mounting bracket 7 is attached to the column 4, the reinforcing bracket 8 is stretched and attached between the two columns 4. In this embodiment, the reinforcing metal fitting 8 is formed by arranging two L-shaped angles 8a to form a lattice beam as shown in FIG. 3B, and the sliding groove 8b is formed as shown in FIG. As shown in a), the two L-shaped angles 8a are fixed to the support column 4 with screws 7c with a part of the mounting brackets 7a and 7b being sandwiched therebetween.
[0018]
In addition, in the mounting bracket 7 attached to one support column 4, two reinforcing brackets 8 are mounted substantially vertically, but the reinforcing bracket 8 is substantially perpendicular between the two reinforcing brackets 8. One positioning fitting 9 is handed over, and the two reinforcing fittings 8 and the positioning fitting 9 are fixed together by screws. As shown in FIG. 2, the positioning metal fitting 9 is attached to the reinforcing metal fitting 8 by all four support columns 4, and the four reinforcing metal fittings 8 are integrally connected. With the reinforcing bracket 8 and the positioning bracket 9, the exact mounting positions of the four columns 4 are determined.
[0019]
While determining the mounting height in the vertical direction of the four reinforcing brackets 8 that are integrally connected in this manner and having a substantially rectangular shape in the plane, the mounting bracket 7 firmly sandwiches the column 4 using the screws 7c, The reinforcing bracket 8 and the mounting bracket 7 are integrally fixed to the four columns 4. The mounting height adjustment operation will be described later.
[0020]
As shown in FIG. 2, four coil springs 10 are passed between the base isolation frame 1 and the four support columns 4, and an elastic force is applied in the horizontal direction.
Although the connection between the base isolation frame 1 and the coil spring 10 is not shown, the connection between the base 4 and the coil spring 10 is performed by a hook pin protruding from the base isolation base 1. It is hooked and connected to a locking pin protruding on the outer periphery.
[0021]
In addition, a plurality of dampers 11 are passed between the base isolation frame 1 and the reinforcing bracket 8. The reinforcing metal fitting 8 and the damper 11 are connected via the universal metal fitting 12.
The universal bracket 12 will be described. As shown in FIGS. 4A and 4B, the universal bracket 12 includes a bolt 12a, a rotating shaft 12b, a U-shaped bracket 12c, and a nut 12d.
[0022]
The universal bracket 12 is configured to be movable along the sliding groove 8b of the reinforcing bracket 8, and can be fixed at a desired position.
Bolts 12 a are inserted into sliding grooves 8 b provided in the reinforcing metal fitting 8. A rotating shaft 12b is provided at one end of the bolt 12a. A hole at the tip of the damper 11 is inserted into the rotating shaft 12b so that the damper 11 can be pivoted.
[0023]
On the other hand, at the other end of the bolt 12a, a nut 12d is screwed through a U-shaped metal fitting 12c having a substantially U-shaped cross section. When the nut 12d is loosened, the universal fitting 12 can be moved along the sliding groove 8b of the reinforcing fitting 8, and the universal fitting 12 can be fixed on the reinforcing fitting 8 by tightening the nut 12d at a desired mounting position. . The universal bracket 12 is configured in this way, and is connected so that the damper 11 can be rotated in the horizontal direction as shown in FIG.
[0024]
Further, the connection between the base isolation frame 1 and the damper is also configured to have a rotation axis in the same manner as the above-described universal bracket 12, and the damper 11 rotates in the horizontal direction also in the connection between the base isolation frame 1 and the damper 11. They are connected so as to be free.
When such a universal bracket 12 is moved, the damper 11 expands or contracts while the damper 11 rotates. The seismic isolation device is configured in this way.
[0025]
Next, adjustment of the damping force using the universal bracket 12 will be described. As shown by the arrow in FIG. 2, the position of the damper 11 is changed as shown by the dotted line in FIG. 2 by moving the universal fitting 12 along the sliding groove 8 b of the reinforcing fitting 8. The solid line damper 11 is in a contracted state, and the dotted line damper 11 is in an expanded state. Since the damping force changes substantially by changing the direction in which the damping force is applied, a desired damping force can be applied to the seismic isolation gantry 1 and the direction and magnitude of the damping force can be adjusted.
[0026]
4 is configured such that the damper 11 can be rotated only in the horizontal direction. However, the damper 11 may be configured to be able to rotate not only in the horizontal movement of the universal bracket 12 but also in the vertical direction.
[0027]
For example, in the universal bracket 12 as shown in FIG. 5, in addition to the bolt 12a, the U-shaped bracket 12c, and the nut 12d, the rotating shaft 12e for rotating the damper 11 in the horizontal direction, and the rotating shaft 12e are rotated. An L-shaped bracket 12f that is pivotally supported and pivoted, and a pivot shaft 12g that projects from the L-shaped bracket and pivots the damper 11 also in the vertical direction.
[0028]
With such a universal bracket 12, when the mounting height of the mounting bracket 7 and the reinforcing bracket 8 is changed, the universal bracket 12 moves in the vertical direction, and the damper 11 moves while the extension 11 is expanded or contracted. The damping force changes following this.
That is, the mounting bracket 7 and the reinforcing bracket 8 are moved in the vertical direction to move the universal bracket 12 in the vertical direction, or the universal bracket 12 is moved along the sliding groove 8b in the horizontal direction. When moved, the damping force of the damper 11 can be expanded. The seismic isolation device of the present invention can also be configured in this way.
In addition to the universal bracket 12 as shown in FIGS. 4 and 5, the eyebolt may be hooked. In other words, the present invention can be implemented if the universal metal fitting 12 is configured to be connected so that the coil spring 10 and the damper 11 follow the movement of the universal metal fitting 12.
[0029]
In the present embodiment, it has been described that the seismic isolation device is configured to connect only the damper 11 with the universal bracket 12 and adjust only the damping force.
However, although not shown, the seismic isolation device can adjust not only the damping force but also the elastic force. In this case, instead of the damper 11 shown in FIG. 2, the coil spring 10 is connected to the reinforcing fitting 8 via the universal fitting 12, and the damper 11 is connected to the column 4 instead of the coil spring 10 shown in FIG. 2. It ’s fine. Thus, it is good also as a seismic isolation apparatus which can adjust only an elastic force.
[0030]
Further, the coil spring 10 and the damper 11 may be connected to the reinforcing metal fitting 8 via the universal metal fitting 12. In this case, both the elastic force and the damping force can be adjusted, and the adjustable range can be widened.
As described above, whether to use a seismic isolation device that adjusts only the elastic force, a seismic isolation device that adjusts only the damping force, or a seismic isolation device that adjusts the elastic force and damping force. Although it is determined in consideration of the conditions, the effect of the present invention can be achieved in any form.
[0031]
According to the seismic isolation device of the present invention, only the base isolation frame 1 moves in the horizontal direction during vibration. Therefore, if the base isolation frame 1 is higher than the existing floor 100, the existing floor 100 and the base isolation frame 1 does not come into contact, and there is no need to provide a shock absorber.
Further, since the coil spring 10 and the damper 11 are housed inside the seismic isolation device, the area of use of the seismic isolation device can be reduced.
In this way, the existing floor 100 can be placed in the immediate vicinity of the seismic isolation device, and since the use area of the seismic isolation device is small, the connection with the existing floor is simple, and there are few installation restrictions. Become.
[0032]
In addition, since the universal bracket 12 described above is disposed in the vicinity of the side surface of the seismic isolation device, if a worker who removes a part of the existing floor 100 and enters the side of the seismic isolation device moves the universal bracket 12, It is possible to easily adjust only the elastic force, only the damping force, or the elastic force and the damping force.
[0033]
Further, when the coil spring 10 is connected using the free metal fitting 12, first, the free metal fitting 12 and the coil spring 10 are connected in a state where the elastic force is small, and then the free metal fitting 12 is moved to increase the elastic force. In this case, the connection can be simplified and the installation work can be facilitated. Further, there is no situation in which the coil spring 10 is suddenly expanded or contracted when the coil spring 10 is connected using the universal metal fitting 12, and the installation work of the coil spring 10 is safe.
[0034]
In addition, since the degree of freedom of the connection position is high in the connection using the universal bracket 12, it is not necessary to set the mechanical accuracy of the parts to a strict value, and various functions are sufficient when assembled even as a seismic isolation device using parts with low mechanical accuracy. A seismic isolation device can be manufactured.
In addition, the need for additional parts to be manufactured and manufactured by using commercially available products such as L-shaped angles as they are, and the structure of the seismic isolation device itself is simplified, thereby reducing the price of the seismic isolation device itself.
In addition, since the seismic isolation device can be easily attached, the construction cost can be kept low. The price of seismic isolation devices can be kept low.
[0035]
【The invention's effect】
According to the present invention, as compared with the conventional seismic isolation device, even when the seismic isolation device is disposed at a position where the existing floor with the increased floor surrounds the surroundings, it is easy to adjust the elastic force or the damping force, and It is possible to provide a seismic isolation device that can be used with the floor adjacent to the surroundings.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a seismic isolation device of the present invention.
FIG. 2 is a plan view of the seismic isolation device according to the embodiment of the present invention with the seismic isolation rack removed.
FIG. 3 is an explanatory diagram for explaining a mounting bracket and a reinforcing bracket of the seismic isolation device according to the embodiment of the present invention.
FIG. 4 is an explanatory view of a universal bracket of the seismic isolation device according to the embodiment of the present invention.
FIG. 5 is an explanatory diagram of a universal bracket of the seismic isolation device according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seismic isolation stand 2 Protected device 3 Sliding plate 4 Support column 5 Ball receiver 6 Ball 7 Mounting bracket 8 Reinforcing bracket 8a L-shaped angle 8b Sliding groove 9 Positioning bracket 10 Coil spring 11 Damper 12 Swivel bracket 12a Bolts 12b, 12e, 12g Rotating shaft 12c U-shaped bracket 12d Nut 12f L-shaped bracket 100 Existing floor 100a Floor support

Claims (2)

A plurality of pillars erected on the floor slab;
A plurality of support portions respectively provided at tips of the plurality of struts;
A base-isolated base that is supported by the plurality of support parts so as to be movable in the horizontal direction;
Reinforcing brackets passed between the two struts,
A mounting bracket for attaching the reinforcing bracket to the column while moving vertically along the column and changing the mounting height of the reinforcing bracket,
An elastic member for imparting an elastic force to the base isolation frame;
A damping member for applying a damping force for damping the vibration of the base isolation frame;
It said elastic member Oyo connected with the seismic isolation mount the front Symbol damping member beauty, and a universal fitting for changing the mounting position by moving in the horizontal direction along the reinforcing metal fitting,
With
Seismic isolation apparatus characterized by adjusting said to grant the seismic isolation frame by changing the mounting position of the universal fitting elastic force and decrease衰力with changing the mounting height of the mounting bracket. The seismic isolation device according to claim 1,
Wherein the plurality of bearing portions seismic isolation device according to claim plurality of balls der Rukoto.

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