JP2001349373A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device to perform both reduction of a cost and the increase in a base isolation effect and to reliably prevent breakage of wiring during base isolation and facilitate underfloor wiring. SOLUTION: Base isolation that upper and lower stoppers 1d and 3b are brought into contact with each other and a base isolation frame 1 and an under surface cover 3 are deviated from a given range is prevented from occurring. By always maintaining a state that upper and lower wiring lead-in holes 1c and 3a are brought into a through state, wiring inserted in the upper and lower lead-in holes 1c and 3a is prevented from being cut off.

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 which attenuates and absorbs vibration transmitted from a floor of a building and protects a precise protected object which is vulnerable to vibration.

[0002]

2. Description of the Related Art Conventional seismic isolation devices are used for electronic devices such as computer servers and antique works such as dishes and jars in museums (hereinafter, collectively referred to in the present specification). (Referred to as a protective body) to protect against vibrations such as earthquakes. For example, Japanese Patent Application Laid-Open No. 11-166590 and Japanese Patent Application Laid-Open No. 11-166591 (Title of Invention: Low-floor type seismic isolation device for display case) are disclosed as conventional technologies of such an isolation device.

[0003] The structure common to these seismic isolation devices is at least two which is fixed to the lower plate on the foundation and has a low center and high ends.
Two arcuate X-rails, at least two arcuate Y-rails having a higher center and a lower end in a direction perpendicular to the X-rail fixed to the lower surface of the upper plate above these X-rails, and a lower part The upper part sandwiching the X rail is provided with a connecting block having a disc spring at the center thereof sandwiching the Y rail, the shock absorber disposed at the end of the X and Y rails, and the downwardly projecting support legs 7 fixed to the lower surface of the upper plate. It is a seismic isolation device that has In the conventional low floor type seismic isolation device for display cases, the X- and Y-rails in the shape of an arc are used. Therefore, the upper plate moves up and down as the upper plate moves horizontally during seismic isolation. To suppress the vertical movement of the top plate.

[0004]

However, the arc-shaped rail is a precision mechanism for sliding the slide portion along the arc-shaped rail, and the cost is high due to the difficulty of machining. In addition, the disc springs are also used less frequently than ordinary springs, and therefore have a higher price in inverse proportion thereto. For this reason, the conventional low-floor seismic isolation device for display cases was very expensive.

[0005] Further, as the quake of the earthquake becomes faster, the coned disc spring of the conventional low-floor seismic isolation device for display cases cannot absorb the up-and-down motion, and the upper plate is lifted up, and the object to be protected is formed on the upper plate. There is a drawback that it may move up and down, and the seismic isolation effect in the vertical direction may not be high when the shaking of the earthquake is fast.

Further, when the protected object is a computer server, a large number of wires (hereinafter simply referred to as wires in this specification) such as power supply lines and communication cables are required. At present, the number of wirings is steadily increasing, but in the seismic isolation device, the upper seismic isolation base moves due to the seismic isolation, so it was necessary to take measures to prevent the wiring from being damaged. Also, in addition to wiring outside the seismic isolation device, there has been a demand that a hole for wiring be provided in the seismic isolation device, and that the wiring be inserted through the hole so that underfloor wiring or the like can be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a seismic isolation device which realizes both low cost and increased seismic isolation effect. It is another object of the present invention to provide a seismic isolation device that reliably prevents damage to wiring during seismic isolation and facilitates wiring under the floor.

[0008]

According to a first aspect of the present invention, there is provided a seismic isolation base having an upper wiring introduction hole on which a protected object is placed. A plurality of upper slide guides attached to the seismic isolation gantry; and a plurality of lower sides to which a slide portion is attached so as to move in a direction substantially perpendicular to a moving direction of the slide portion of the upper slide guide and substantially parallel to a horizontal plane. A slide guide, having a lower wiring introduction hole, a lower surface cover to which the lower slide guide is attached, attached to extend and contract according to the movement of a slide portion of the upper slide guide and the lower slide guide, A spring for urging the seismic isolation gantry and the lower surface cover to be at predetermined positions, an upper stopper attached to the seismic isolation gantry, and a spring attached to the lower surface cover. A lower stopper, wherein the upper stopper and the lower stopper abut against each other to prevent seismic isolation in which the seismic isolation base and the lower surface cover deviate from a predetermined range, The present invention is characterized in that a state in which the upper wiring introduction hole and the lower wiring introduction hole are penetrated is always maintained to prevent disconnection of the wiring inserted into the upper wiring introduction hole and the lower wiring introduction hole.

According to the seismic isolation device of the second aspect,
2. The seismic isolation device according to claim 1, wherein the area of the upper wiring introduction hole is smaller than the area of the lower wiring introduction hole, and the upper wiring introduction hole is a lower wiring when viewed from the base. It is characterized by being always above the introduction hole and maintaining a penetrating state.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the seismic isolation device of the present invention will be described. 1 is an exploded perspective view showing the internal structure of this embodiment, FIG. 2 is an external view of the same, FIG. 3 is an explanatory view of a slide device, FIG. 4 is an internal view of the inside of a lower cover, and FIG. Inside view of FIG. 6, FIG.
FIG. 7 is a side cross-sectional view, and FIG. 8 is an explanatory view for explaining the role of the stopper during the seismic isolation operation. Hereinafter, the present embodiment according to claims 1 and 2 will be described.

As shown in FIG. 1, the seismic isolation device of the present embodiment includes a seismic isolation frame 1 on which a protected object (not shown) is mounted, and a slide device mounted below the seismic isolation frame 1. 2, a lower cover 3 attached to the lower side of the slide device, and a non-slip mat 4 arranged below the lower cover 3.

The seismic isolation gantry 1 is formed by mounting and fixing an upper cover 1a to a frame 1b in which square members are combined in a cross-girder form to form a robust structure. 1 and 2
As shown in (a), the upper cover 1a is provided with an upper wiring introduction hole 1c which is a square hole. The upper wiring introduction hole 1c is not limited to a square hole, but may be a hole having various shapes such as a round hole and a rounded corner hole. These shapes are appropriately selected and designed.

The slide device 2 uses two linear slide guides that move only in one direction. The direct-acting slide guide assumed in the present invention is such that, taking the upper slide guide 2a shown in FIG. 3 as an example, the slide portion 2b slides smoothly in the X direction along the linear guide rail portion 2c. It is a mechanical element and is generally commercially available. The movement in the XY direction is realized by combining two of the linear slide guides.

More specifically, as shown in FIG. 3, the upper slide guide 2a and the lower slide guide 2d are oriented in the X-Y direction,
b, 2e are attached via the connecting plate 2g. A hole (not shown) is provided in the connection plate 2g so as to coincide with a screw hole (not shown) provided in the slide portions 2b and 2e, and screws are screwed in the directions of arrows A and B shown in FIG. Further, springs 2h, 2i are attached to the slide portions 2b, 2e.
Attach. The springs 2h and 2i expand and contract and apply an urging force to stop at substantially the center of the guide rail portions 2c and 2f.

As shown in FIG. 1, a lower cover 3 is disposed below the slide device 2, and four slide devices 2 are attached and fixed to the lower cover 3. The lower cover 3 is also provided with a lower wiring introduction hole 3a. FIG.
In FIG. 1, the lower stopper shown in FIG. 4 is disposed around the lower wiring introduction hole 3a.
In the drawings, illustration is omitted for clarity.

With this configuration, the lower cover 3
In contrast, the seismic isolation gantry 1 moves in the XY directions. As described above, a seismic isolation device including the seismic isolation base 1, the slide device 2, and the lower cover 3 may be used. However, if the seismic isolation device is directly placed on the floor, a situation in which the user slips on the floor is assumed. It is desirable to place it on the floor via a non-slip mat 4. Further, instead of the non-slip mat 4, the surface of the lower surface cover 3 that contacts the floor may be formed as a rough surface to increase the contact resistance. In addition, a dedicated stand designed for increasing the floor can be provided to realize wiring under the floor. These configurations are appropriately selected. In addition, seismic isolation frame 1
The attachment of the slide device 2 to the lower cover 3 will be described later.

As shown in FIGS. 2A and 2C, the lower wiring introduction hole 3a and the upper wiring introduction hole 1c are located at the center, and the lower wiring introduction hole when viewed from above the seismic isolation frame 1. The hole 3a and the upper wiring introduction hole 1c are attached so as to form a through hole. Further, the area of the lower wiring introduction hole 3a is:
The area is set to be sufficiently larger than the area of the upper wiring introduction hole 1c. This means that even if the base is moved,
This is to maintain the state in which the lower wiring introduction hole 3a and the upper wiring introduction hole 1c penetrate, so that even if there is a wiring, it is not broken by the seismic isolation operation.

Next, the principle of the XY movement of the seismic isolation device will be further described. As shown in FIG. 4, a lower slide guide 2d is fixed to the lower surface cover 3, and a lower stopper 3b serving as a peripheral wall of the lower wiring introduction hole 3a is fixed. The lower stopper 3b is configured by forming a frame with an L-shaped angle and arranging a buffer body such as rubber or urethane so as to cover an inner wall surface thereof, as shown also in a sectional view taken along line AA of FIG. Have been. The lower slide guide 2d has a guide rail 2f disposed on the lower cover 3 so that the slide 2e moves in the Y direction.

As shown in FIG. 5, an upper slide guide 2a is fixed to the base isolation frame 1, and an upper stopper 1d which is a peripheral wall of the upper wiring introduction hole 1c is fixed. The upper stopper 1d has a frame formed by an L-shaped angle and a buffer such as rubber or urethane arranged so as to cover the outer wall surface thereof, as shown also in a sectional view taken along the line BB of FIG. ing. The upper slide guide 2a is a slide portion 2.
The guide rail portion 2c is arranged on the seismic isolation gantry 1 so that b moves in the X direction.

When the seismic isolation base 1, the slide device 2, and the lower cover 3 are assembled, a structure as shown in FIGS. 6 and 7 is obtained. The spring 2h is attached to the upper pin 1e as shown in the front section of the seismic isolation device in FIG. 6, and the spring 2i is attached to the lower pin 3c as shown in the side sectional view in FIG. .

With this configuration, the operation differs between the X direction and the Y direction. In the X direction, as shown in FIG. 6, the seismic isolation gantry 1 and the guide rail 2c move integrally in the X direction. However, the seismic isolation operation is performed by the expansion and contraction force of the spring h, and the seismic isolation base 1 attempts to restore to the original position. Similarly, in the Y direction, as shown in FIG. 7, the seismic isolation frame 1, the upper slide guide 2a, the connecting plate 2g, and the slide portion 2e of the lower slide guide move in the Y direction. However, the seismic isolation operation is performed by the expansion and contraction force of the spring i, and the seismic isolation gantry 1 attempts to return to the original position. However, the seismic isolation gantry 1 can move at an arbitrary angle (direction) on the XY plane with respect to the lower surface cover 3 even if the operation is different between the X direction and the Y direction. Even if a small force is applied to the seismic isolation frame 1 in any direction, the seismic isolation frame 1 moves and performs a seismic isolation operation.

The seismic isolation device which is moved in this way is prevented from moving beyond a predetermined range by the upper stopper 1d and the lower stopper 3b.
In normal times, the upper wiring introduction hole 1c and the lower wiring introduction hole 3a are located at positions where the centers thereof substantially coincide with each other by the biasing of the springs 1h and 1i as shown in FIG. When the seismic isolation operation is started, the seismic isolation base moves by the seismic isolation operation, and the upper stopper 1d and the lower stopper 3b collide with each other. Then, the movement is stopped and the vibration is absorbed by the buffer. Such a seismic isolation device enhances the seismic isolation function.

Also, with this configuration, the upper wiring introduction hole 1c and the lower wiring introduction hole 3a are always in a state of being penetrated even during the seismic isolation operation, so that a situation in which the wiring is broken can be prevented. For example, when the protected object is a server computer, a situation in which a failure occurs due to a break in wiring is avoided.

[0024]

According to the present invention, since relatively inexpensive components such as linear slide guides and coil springs can be used instead of expensive precision mechanisms such as arc-shaped rails and disc springs, the present invention is not required. The seismic device can be configured at low cost. In addition, since the seismic isolation device moves only in the horizontal XY direction and does not move in the vertical direction, the seismic isolation base moves up and down even when the earthquake shakes quickly. A situation in which the protected object moves up and down is avoided, and the vertical seismic isolation effect can be enhanced.

When the object to be protected is a computer or an electronic device, when the underfloor wiring is performed through the upper wiring introduction hole 1c and the lower wiring introduction hole 3a of the seismic isolation device, the upper stopper 1d and The state where the hole penetrates is reliably maintained by the lower stopper 3b, and the situation where the overhead wire is broken is reliably prevented.

As described above, according to the present invention, it is possible to provide a seismic isolation device which realizes both low cost and increased seismic isolation effect. In addition, it is possible to provide a seismic isolation device that reliably prevents breakage of wiring during seismic isolation and facilitates wiring under the floor.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an internal structure of an embodiment of a seismic isolation device of the present invention.

FIG. 2 is an external view of an embodiment of the seismic isolation device of the present invention.

FIG. 3 is an explanatory view of a slide device of the seismic isolation device of the present invention.

FIG. 4 is an inside view of the inside of a lower surface cover of the seismic isolation device according to the embodiment of the present invention.

FIG. 5 is an inside view of the interior of the base isolation base of the base isolation device according to the embodiment of the present invention.

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

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

FIG. 8 is an explanatory diagram illustrating a role of a stopper during the seismic isolation operation of the seismic isolation device of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismic isolation stand 1a Top cover 1b Frame 1c Upper wiring introduction hole 1d Upper stopper 1e Upper pin 2 Slide device 2a Upper slide guide 2b Slide portion 2c Guide rail portion 2d Lower slide guide 2e Slide portion 2f Guide rail portion 2g Connection plate 2h Spring 2i Spring 3 Bottom cover 3a Lower wiring introduction hole 3b Lower stopper 3c Lower pin 4 Non-slip mat

Claims (2)

[Claims] 1. A seismic isolation base having an upper wiring introduction hole, on which a protected body is placed, a plurality of upper slide guides attached to the seismic isolation base, and a moving direction of a slide portion of the upper slide guide. A plurality of lower slide guides to which a slide portion is attached so as to move in a direction substantially perpendicular to and substantially parallel to a horizontal plane; and a lower cover having a lower wiring introduction hole and to which the lower slide guide is attached. A spring attached to extend and contract in accordance with the movement of the slide portions of the upper slide guide and the lower slide guide, and biasing the seismic isolation gantry and the lower surface cover to be at predetermined positions; An upper stopper attached to the gantry, and a lower stopper attached to the lower surface cover, comprising: an upper stopper; The lower stopper abuts to prevent seismic isolation in which the seismic isolation base and the lower surface cover deviate from a predetermined range, and always maintains a state in which the upper wiring introduction hole and the lower wiring introduction hole are penetrated. A seismic isolation device characterized by preventing disconnection of wiring inserted into the upper wiring introduction hole and the lower wiring introduction hole. 2. The seismic isolation device according to claim 1, wherein the area of the upper wiring introduction hole is smaller than the area of the lower wiring introduction hole, and the upper wiring introduction hole is viewed from the seismic isolation mount side during seismic isolation. The seismic isolation device is characterized in that the hole is always above the lower wiring introduction hole and is kept penetrating.