JPH1182620A - Seismic isolation device - Google Patents

Abstract

(57) [Problem] An object of the present invention is to prevent a computer from falling over by a fall prevention means at the time of a large earthquake and to prevent damage to the computer. According to the present invention, a support member movable on a bottom plate of a cylindrical member disposed on a free access floor is provided at the center of the cylindrical member, and the support member and a spring member attached to a foundation floor (building floor) are provided. A seismic isolation device characterized by being connected by a connecting member disposed so as to penetrate a hole provided in a center of a bottom plate of a cylindrical member and a free access floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake countermeasure for a computer, and more particularly to a seismic isolation device which supports a computer leg to prevent the computer from falling.

[0002]

2. Description of the Related Art Seismic measures for computers can be roughly classified into 1) non-fixed method, 2) fixed method, and 3) seismic isolation floor method. The computer is typically mounted on a free access floor supported by a number of pedestal members located on the floor of the building. The fixing method of 2) is a method in which the computer legs are fixed by supporting members provided on the floor of the building. The computer can be prevented from moving and falling, but the response acceleration of the computer during an earthquake increases. Therefore, it is difficult to maintain the functions of the computer during an earthquake.

[0003] In the method using a base-isolated floor of 3), a spring device for applying a restoring force to a free access floor on which a computer is mounted and a supporting device that supports the floor and that can move in a horizontal direction, and a damping device for suppressing the amount of movement. It consists of a seismic isolation device consisting of
Although it is possible to maintain the function of the computer even during a large earthquake, this method requires the most cost and installation time among the three methods.

[0004] The non-fixing method of 1) includes a method of installing a simple seismic isolation device in addition to a method of installing a leveling bolt or a caster of the computer on the free access floor. However, during a large earthquake, the computer falls over, and there is a risk of occurrence of a secondary disaster such as a personal injury. The seismic isolation device in the non-fixed method has basically the same configuration as the seismic isolation device used for the seismic isolation floor, and a support member that enables the horizontal movement of the computer main body or the mount on which the computer is mounted, and a restoring force. And a damping member. Further, the spring member may be omitted in some cases.

In particular, the prior art seismic isolation device is disclosed in
As described in JP-A-69143, the first and second sliding members provided to support the legs of the computer and capable of moving the legs horizontally allow for a small earthquake. Moves the inside of the bottom plate with the first sliding member to reduce the acceleration of the computer body. In the case of a large earthquake, when the sliding member collides with the cylindrical member, the entire cylindrical member is placed on the free access floor by the second sliding member. Will slide,
The response acceleration of the computer is suppressed relatively small.

[0006]

However, the above prior art has the following technical problems. In other words, when the second sliding member slides on the free access floor in response to a large earthquake, a large slip may occur, which may cause a nearby person to hit, and also the free access floor for computer wiring. However, there is a possibility that the computer may fall over or be damaged due to the seismic isolation device falling into the hole or being caught by the wiring.

An object of the present invention is to provide a compact seismic isolation device provided with a means for preventing overturning, and to provide a simple seismic measure for directly supporting a computer main body. It exerts seismic isolation effect on small and medium earthquakes and secures the function of the computer. In the case of a large earthquake, the fall prevention mechanism prevents the computer from overturning, preventing damage to the computer and preventing secondary disasters such as personal injury It is to be.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is a seismic isolation device provided with a fall prevention means.
A first structure of the seismic isolation device of the present invention is that a support member movable on a bottom plate of a cylindrical member arranged on a free access floor is provided at the center of the cylindrical member, and the support member and a spring member or the like attached to the floor of a building are provided. Are connected by a connecting member disposed so as to penetrate a hole provided in the center of the bottom plate of the cylindrical member and the free access floor.

The second structure is a structure in which the support member and the floor of the building are connected by a turnbuckle member and an elastic member instead of the spring member. The third structure is a structure in which the support member is supported inside the holder member. This structure has a piston member coupled to a member and provided with a restoring force by a spring member, and a gap between the cylindrical surface of the holder member and the side surface of the piston member is filled with a high-viscosity material.

In the fourth structure, an appropriate gap is provided between the support member and the bottom plate of the cylindrical member in the first structure, and the gap between the support member and the bottom plate of the cylindrical member is filled with a high-viscosity material. The structure is such that a brim member is provided in the hole so that the highly viscous body does not leak from the hole in the bottom plate. Note that a universal joint member or the like is provided at a connection portion between the support member and the floor of the building so as not to restrict horizontal movement of the support member.
In addition, by providing the cushioning member on the inner wall of the cylindrical member, it is possible to suppress the collision force when the support member collides with the wall of the cylindrical member.

Next, the operation of the above structure will be described.

According to the first structure of the seismic isolation device of the present invention described above, when a horizontal seismic force is applied to the computer, the seismic force is not directly transmitted to the computer due to the horizontal movement of the support member. A seismic effect is obtained. Further, as the horizontal movement increases, the spring force generated by the spring member between the support member and the bottom plate of the cylindrical member increases,
The frictional force between the support member and the bottom plate of the cylindrical member increases, and horizontal movement is suppressed. In the case of a large earthquake, when a collision occurs with a cushioning member provided on the inner wall of the cylindrical member, the support member tends to rise, but the connection member and the spring member suppress the rise of the support member. Further, the frictional force between the movable member and the bottom plate of the cylindrical member can be adjusted by the spring member, and the amount of movement of the support member due to the seismic force can be reduced.

In the second structure of the seismic isolation device, the operation is the same as that of the first structure, but the structure is simplified. The third structure of the seismic isolation device is provided with damping means utilizing the viscous resistance force of a high-viscosity material between the holder member and the piston member, and generates a large resistance force as the movement speed of the piston increases. , The collision force when the support member collides with the buffer member can be reduced. In the fourth structure of the seismic isolation device, instead of the piston-type high-viscosity member damping means of the third structure of the seismic isolation device, the viscous resistance of the high-viscosity material provided between the support member and the bottom plate of the cylindrical member is used. It uses force.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG.

FIG. 2 is a longitudinal sectional view in which the seismic isolation device of the present invention is applied to a computer. In this embodiment, a pedestal member 16 is provided on a base floor (hereinafter, referred to as a base floor) 15, a free access floor 17 is provided thereon, and a leg 13 of the computer 12 is supported thereon. Are provided.

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

The seismic isolation device shown in FIG.
A support member 4 having a movable member 3 movable on the bottom plate 2 of the cylindrical member 1 disposed at the center is provided at the center of the cylindrical member 1. The provided universal joint members 5a and 5b are provided. The spring member 9 is provided on the holder member 8 supported by the universal joint member 5b on the base floor 15 side, and supported by the universal joint member 5a provided on the support member 4. The connecting member 7 is inserted from the upper end of the holder member 8 through the bottom plate 2 of the cylindrical member 1 and the hole 18 provided in the free access floor 17, and is inserted into the holder member 8.
The structure is such that the spring member 9 is supported at the end of the connection member 7 so that a compressive load is applied to the spring member 9 through the center of the spring member 9 disposed inside the connection member 7.

Further, the cylindrical member 1 does not necessarily need to be fixed to the free access floor 17 with bolts or the like, and a rubber plate member or the like is provided between the free access floor 17 and the bottom plate 2 of the cylindrical member 1 so that the cylindrical member 1 can be fixed. Should not slip on the free access floor 17. The leg 13 of the computer 12 is fixed to the support member 4 by a fixing member 14.

Next, the operation of this embodiment will be described.

In FIG. 1, when a horizontal seismic force is applied to the computer 12, the horizontal movement of the support member 4 does not directly transmit the seismic force to the computer 12, so that a seismic isolation effect is obtained. Also, as this horizontal movement increases,
The pressing force generated between the support member 4 and the bottom plate 2 of the cylindrical member 1 is increased by the spring member 9, so that the support member 4
The frictional force acting in the direction opposite to the moving direction of the support member 4 increases, and the horizontal movement of the support member 4 is suppressed. In the case of a large earthquake, the support member 4 tends to rise when it collides with the cushioning member 6 provided on the inner wall of the cylindrical member 1, but the connection member 7 and the spring member 9 prevent the support member 4 from rising. Is done.

At this time, since the spring member 9 is used in the compression direction, the spring member 9 cannot be deformed beyond the close contact state, so that the floating is reliably prevented. Also, the spring member 9
As a result, the moving member 3 of the support member 4 and the bottom plate 2 of the cylindrical member 1
Can be increased, and the amount of movement of the support member 4 due to the seismic force can be reduced.

FIG. 3 shows a longitudinal sectional view of another embodiment.
The embodiment in FIG. 3 has a structure in which the support member 4 is supported by a turnbuckle member 19 and an elastic member 20 instead of the holder member 8 and the spring member 9. This example is
The configuration is simpler than in FIG. 1, and substantially the same effect can be obtained.

FIG. 4 shows a longitudinal sectional view of another embodiment. In this embodiment, the universal joint member 5b supported on the base floor 15 side in FIG. 1 is provided with a bolt portion on the pedestal member 16 via the mounting member 21, and is fixed to this. In this case, the base floor 1
There is an advantage that it is not processed into 5.

FIG. 5 shows a longitudinal sectional view of still another embodiment. In this embodiment, instead of the connecting member 7, the holder member 8, and the spring member 9 provided between the universal joint members 5 in the embodiment of FIG. 1, one end of the wire member 23 is attached to the support member 4 by a wedge-shaped member 22. Is provided and fixed, and the tension type spring member 9 is attached to the other end of the wire member 23.
And a hook portion at the other end of the spring member 9 is attached to an eyebolt member 24 fixed to a spacer member 10 provided on the base floor 15 and attached. This embodiment has the simplest structure, but since the spring member 9 is used in the tension direction, it is better to use a relatively hard spring in order to prevent excessive lifting during a large earthquake.

FIG. 6 is a longitudinal sectional view of still another embodiment. In this embodiment, in the embodiment of FIG. 1, a piston member 25 connected to the support member 4 via the connecting member 7 is provided inside the holder member 8, and the cylindrical surface of the holder member 8 and the side surface of the piston member 25 are connected. This is a structure in which a high-viscosity body 26 is filled in the gap. In this way, when the support member 4 moves during an earthquake, relative movement occurs between the piston member 25 and the side surface of the holder member 8, and a viscous resistance force is generated by the high viscous body 26 therebetween. , Support member 4
Can be prevented from slipping too much.

FIG. 7 is a longitudinal sectional view of another embodiment. In this embodiment, a suitable gap is provided between the support member 4 and the bottom plate 2 of the cylindrical member 1 in FIG.
A high-viscosity body 26 is provided in the gap between the bottom plate 2 of the cylindrical member 1 and the high-viscosity body 26 does not leak from the hole of the bottom plate 2.
This is a structure in which a brim member 27 is provided in the hole. Also in this embodiment, the excessively slipping of the support member 4 can be suppressed by the high-viscosity body 26 during an earthquake.

FIG. 8 is a longitudinal sectional view of another embodiment. In this embodiment, a ball bearing member 28 is provided as the moving member 3 in FIG. In this case, since the horizontal movement of the support member 4 is smoothed by the ball bearing member 28, a large seismic isolation effect can be obtained even in a small earthquake.

[0028]

As described above, according to the present invention, it is possible to provide a seismic isolation device which is compact and can prevent a computer from falling down even during a large earthquake, and a room or a building having the seismic isolation device. it can.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a seismic isolation device shown as one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view in which the seismic isolation device of the present invention is applied to a computer room.

FIG. 3 is a longitudinal sectional view of a seismic isolation device according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a seismic isolation device according to another embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a seismic isolation device according to another embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a seismic isolation device according to another embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a seismic isolation device according to another embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a seismic isolation device according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cylindrical member, 2 ... Bottom plate, 3 ... Moving member, 4 ... Support member, 5 ... Universal joint member, 6 ... Buffer member,
7 ... connecting member, 8 ... holder member, 9 ... spring member, 10 ...
Spacer member, 11: Seismic isolation device, 12: Computer, 13 ...
Leg member, 14 ... fixing member, 15 ... foundation floor (building floor),
16: pedestal member, 17: free access floor, 18
... Hole, 19 ... Tumbuckle member, 20 ... Elastic member,
21: mounting member, 22: wedge-shaped member, 23: wire member, 24: eyebolt member, 25: piston member, 26: high-viscosity body, 27: brim member, 28: ball bearing member.

Continued on the front page (72) Inventor Mitsuo Miyamoto 1 Horiyamashita, Hadano-shi, Kanagawa Prefecture Inside the general-purpose computer division of Hitachi, Ltd. (72) Inventor Tsuneo Horie 1st Horiyamashita, Hadano-shi, Kanagawa General-purpose computer, Hitachi Within the business division

Claims (1)

[Claims] 1. A seismic isolation device disposed on a free access floor supported by a pedestal member provided on a base floor, wherein the support has a moving member that can move in a horizontal plane on a bottom plate disposed on the free access floor. The members and the foundation floor,
A seismic isolation device characterized by being connected through a hole provided in the center of the bottom plate and a free access floor.