JPH0932261A - Base isolation floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a installation cost low and shorten an installation period by forming part of a floor structure constituted of a lower floor and an upper floor into a base isolation structure. SOLUTION: A fixed base 9 is installed on a concrete floor. A moving base 10 is provided movably in the horizontal direction above the fixed base 9. Sliding stanchions 11 supporting the moving base 10 are slidably provided. A base isolation unit 13 is buried in a floor panel 14 so that the center of the moving base 10 coincides with the center of the fixed base 9. Panel stanchions 15 for supporting the base isolation floor panel 14 are erected on the moving base 10.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a seismic isolation floor structure,
Particularly, the present invention relates to a seismic isolation floor structure configured so that a seismic isolation floor can be easily installed on the floor of a structure.

[0002]

2. Description of the Related Art Generally, the floor of a computer room in which a large computer is installed has a seismic isolation floor structure in order to prevent the components of the computer from collapsing due to vibration when an earthquake occurs.

In this type of seismic isolation floor structure, a floor panel (upper floor) of a computer room in which computer equipment is installed is movably installed in a horizontal direction with respect to a concrete floor (lower floor) of a building, and A steel frame for supporting the floor panel in a space formed between the floor panel, a damper for slidably supporting the steel frame with respect to the concrete floor, and a buffer for relative movement of the steel frame and the floor panel, and a steel frame and A plurality of coil springs for urging the floor panel to return to the position before the movement is provided.

Further, a plurality of discs filled with oil and stacked at predetermined intervals are provided in the damper, and when acceleration due to vibration is transmitted, the discs are filled with oil. A shearing force acts to reduce the acceleration due to vibration.

[0005]

However, in the conventional seismic isolation floor structure, in order to make the entire computer room a seismic isolation floor structure as described above, steel frames, dampers, coil springs, etc. for supporting the floor panel are provided on the entire floor. It had to be installed and required a fairly large-scale installation work. Therefore, in the past, not only the construction cost for installing the base isolation floor structure was high, but also the construction period was long.

Further, when adopting the seismic isolation floor structure as described above, since it is necessary to increase the strength of the concrete floor so as to withstand a considerable weight, the seismic isolation floor structure is constructed from the stage of building a building. It is necessary to secure the strength of the concrete floor by considering where to install the floor. Therefore, it was difficult to install a seismic isolation floor structure on the floor of an already constructed building.

Further, conventionally, since the entire computer room has a seismic isolation floor structure, not only computer equipment requiring seismic isolation but also equipment not requiring seismic isolation are placed on the floor panel, Or the aisles were seismically isolated, and there was a lot of waste. Then, this invention aims at providing the base isolation floor structure which solved the said problem.

[0008]

In order to solve the above problems, the present invention has the following features. The invention according to claim 1 is characterized in that a part of the floor structure including the lower floor and the upper floor is a seismic isolation structure.

Therefore, according to claim 1, a part of the floor structure consisting of the lower floor and the upper floor is made to be a seismic isolation structure,
Only the parts that need seismic isolation can be operated, and it is possible to install the entire floor more easily than with a seismic isolation structure, which reduces installation costs and installs in a short period of time. be able to.

Further, the invention of claim 2 is the seismic isolation floor structure according to claim 1, wherein a fixed base installed on the lower floor and an upper surface of the fixed base are provided so as to face each other. A movable base that relatively moves with respect to the fixed base, a pillar that supports the movable base horizontally with respect to the fixed base, and the movable base such that the center of the movable base faces the center of the fixed base. A seismic isolation unit consisting of an urging member for urging the above is embedded in the upper floor.

Therefore, according to the second aspect, the seismic isolation unit including the fixed base, the movable base, the support column for movably supporting the movable base in the horizontal direction, and the biasing member for biasing the movable base. Since it is embedded in the upper floor, the structure can be simplified and the weight can be reduced, and the installation work can be easily performed.

The invention according to claim 3 is the seismic isolation floor structure according to claim 1, wherein a plurality of the seismic isolation units are embedded in the floor in an arbitrary pattern. Is. Therefore, according to claim 3, since a plurality of seismic isolation units are buried in the floor in an arbitrary pattern, the seismic isolation units can be installed in accordance with the floor plan of the room to be installed and the size and shape of the equipment to be placed. The installation pattern can be selected.

Further, the invention of claim 4 is characterized in that, in the plurality of seismic isolation units, the moving bases of the seismic isolation units provided adjacent to each other are connected by a connecting member. Therefore, according to claim 4, since the moving bases of the plurality of seismic isolation units are connected by the connecting member, the plurality of seismic isolation units can simultaneously perform the seismic isolation operation, and the plurality of seismic isolation units are isolated from the vibration caused by the earthquake. Since it can be distributed to the seismic units, the seismic isolation effect can be enhanced even when the mounted devices are not evenly arranged.

The invention of claim 5 is characterized in that a low-friction member is provided at the sliding end of the column. Therefore, according to the fifth aspect, since the low friction member is provided at the sliding end portion of the column, the relative movement of the movable base with respect to the fixed base becomes smooth, and the seismic isolation effect can be further enhanced.

The invention of claim 6 is characterized in that the moving base supports a floor panel provided so as to close an opening formed in the upper floor. Therefore, according to the sixth aspect, by supporting the floor panel provided so that the moving base closes the opening formed in the upper floor, it is possible to prevent the stress of the biasing member from acting on the floor panel. Therefore, the equipment placed on the floor panel can be stably supported.

The invention of claim 7 is characterized in that the floor panel slidably contacts the upper surface of the upper floor, and slides along with the movement of the movable base. Therefore, according to claim 7, the edge portion of the floor panel slidably abuts on the upper surface of the upper floor and slides with the movement of the moving base, so that the floor panel can be laid so as not to get in the way. At the same time, the floor panel can be configured so as not to interfere with the seismic isolation operation.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a base isolation floor structure according to the present invention will be described below with reference to the drawings. 1 is a perspective view showing a state where the base isolation floor structure is installed, and FIG. 2 is an enlarged perspective view showing the base isolation floor structure.

In the computer room 1, a CPU main body 2a, a communication control device 2b, a magnetic disk device 2c, a terminal device 3 and the like which constitute the computer 2 are installed. The floor structure of the computer room 1 is constructed by laying a square floor panel (upper floor) 5 above a concrete floor (lower floor) 4.

Each floor panel 5 is supported by support legs 6 which are provided upright on the concrete floor 4. Also,
The support legs 6 are adjustable in height so that the floor panels 5 have the same height, and are arranged so as to support the butted portions between the floor panels 5 adjacent to each other.

A space 7 having a predetermined height is formed between the concrete floor 4 and the floor panel 5, and each space of the computer 2 and each cable pulled out from the terminal device 3 is formed in this space 7. A type (not shown) is inserted. In this embodiment, only the CPU main body 2a, which requires the most seismic isolation, is placed on the seismic isolation floor structure 8 among the respective devices of the computer 2. The seismic isolation floor structure 8 does not seismically isolate the entire computer room 1, but only a part of the floor panel 5 of the computer room 1 is seismic isolated. It is installed so that only the CPU main body 2a, which is greatly damaged when it is collapsed by, is seismically isolated.

The structure of the seismic isolation floor structure 8 will now be described. 3 is a plan view showing the base isolation floor structure with the floor panel removed, FIG. 4 is a side view of the base isolation floor structure 8, and FIG. 5 is a side view for explaining the configuration of the base isolation unit 13. is there. The seismic isolation floor structure 8 is roughly slidable with respect to the fixed base 9, a fixed base 9 laid on the concrete floor 4, a movable base 10 provided above the fixed base 9 so as to be horizontally movable. Four sliding columns 11 are provided to support the moving base 10, and the center of the moving base 10 is the fixed base 9.
A seismic isolation unit 13 including four coil springs (urging members) 12 for urging the moving base 10 so as to coincide with the center of the base is embedded in the floor panel 5. Further, panel pillars 15 for supporting the seismic isolation floor panel 14 having a square shape are erected on the moving base 10.

The fixed base 9 has a rubber friction plate (not shown) adhered to the lower surface of the iron plate 9a. Since this friction plate is directly placed on the concrete floor 4, the fixed base 9 and It is locked in an immovable state due to friction. Therefore, the fixed base 9 does not need to use anchor bolts or the like for fixing to the concrete floor 4,
It can be easily installed because it is only placed on.

The fixed base 9 is square when viewed from above, and a smooth sliding plate 9b is integrally provided on the upper surface of the iron plate 9a. In this embodiment, four fixed bases 9 are laid for one seismic isolation unit 13, and each sliding plate 9b is provided so as to be located at the four corners of the four fixed bases 9. .

Further, locking pins 16 for locking one end of each coil spring 12 are erected near the centers of the four fixed bases 9. The other end of each coil spring 12 is hooked on the sliding column 11, and is arranged so as to extend radially in a diagonal direction with respect to the four fixed bases 9.

Since the retaining pin 16 is fixed to the fixed base 9, the coil spring 12 can expand and contract around the retaining pin 16. Therefore, each sliding strut 11 is urged toward the center of the four fixed bases 9 by the four coil springs 12 arranged radially.

The moving base 10 is formed in a rectangular shape by iron beams 10a to 10d having a quadrangular cross section, and a reinforcing member 10e is horizontally installed in the center. The sliding bases 11 are provided at the four corners of the moving base 10. Further, panel supports 15 for supporting the seismic isolation floor panel 14 are erected on the upper end sides of the ends and middles of the beams 10a to 10d of the moving base 10 and the middle of the reinforcing member 10e. In this way, the seismic isolation floor panel 1 in which the moving base 10 is provided so as to close the opening formed in the floor panel 5
By supporting 4, it is possible to prevent the stress of the coil spring 12 from directly acting on the seismic isolation floor panel 14, and
The equipment placed on the seismic isolation floor panel 14 can be stably supported.

The panel support column 15 is fitted into a recess 14a formed in the lower surface of the seismic isolation floor panel 14, and the seismic isolation floor panel 14 is fitted.
Is provided with a locking portion 15a. The locking portion 15a is composed of four protrusions formed by a cross-shaped groove when viewed from above, and the edge portion of the seismic isolation floor panel 14 is fitted into the cross-shaped groove to fit into the recess 14a. It is attached to fit.

Therefore, the seismic isolation floor panel 14 is locked by the locking portion 15a provided at the upper end of the panel support 15 to restrict the mounting position, and is prevented from falling off from the panel support 15. The seismic isolation floor panel 14 is formed to have substantially the same size as the floor panel 5, and in this embodiment,
4 seismic isolation floor panels for 1 seismic isolation unit 13
4 is configured to be supported.

Since the seismic isolation unit 13 is sized to support the four seismic isolation floor panels 14 as described above, the seismic isolation unit 13 has a relatively compact structure and can be installed easily. In addition, the floor panel 5 is provided around the seismic isolation floor panel 14.
A sliding panel 17 is provided which slides on the floor panel 5 when it is placed on the upper surface of the floor and performs a base isolation operation together with the base isolation floor panel 14. This sliding panel 17 is also the seismic isolation floor panel 14 described above.
Similarly, the panel support 15 is attached so as to be supported in a state of being locked by the locking portion 15a of the panel support 15.

Then, the floor panel 5 is provided by the sliding panel 17.
The seismic isolation floor panel 14 is closed so that the seismic isolation unit 13 cannot be seen from above the floor panel 5.
Further, the sliding panel 17 is formed in a thin plate shape so as not to hinder the passage of traffic, and even when the seismic isolation operation is performed in the event of an earthquake, the thin plate portion only slides on the floor panel 5, so it is safe. Is.

Further, the panel column 15 has a threaded structure at its intermediate portion so that the height can be adjusted, and the nut portion 15b formed on the outer periphery is extended and contracted in the vertical direction by turning the nut portion 15b with a tool. 15a can be raised and lowered. Therefore, after the seismic isolation unit 13 is installed, the height positions of the seismic isolation floor panel 14 and the sliding panel 17 can be adjusted according to the floor panel 5.

FIG. 6 is an enlarged side view showing the mounting state of the sliding column 11 and the coil spring 12. Sliding support 1
1 is a bracket 1 provided at four corners of the moving base 10.
Screw hole 18a of the cylindrical bush 18 provided at 0f
It is screwed to. Further, the protruding length of the sliding strut 11 that protrudes downward from the bracket 10f is determined by the amount of screwing into the screw hole 18a by engaging the tool with the square-shaped engaging portion 11a provided at the upper end and rotating the tool. It is adjusted to a predetermined protrusion length. And the sliding support 11
After the protrusion length is adjusted, the nut 19 is tightened and fixed.

A disc-shaped low-friction member 20 is fixed to the lower end recess of the sliding column 11. The low-friction member 20 is made of, for example, acetal resin, and is attached so as to contact the sliding plate 9b of the fixed base 9. The sliding strut 11 is a low friction member 2
Since it is slidably provided on the sliding plate 9b of the fixed base 9 through 0, when a horizontal acceleration is applied due to an earthquake, the low friction member 20 causes the sliding plate 9 of the fixed base 9 to move.
Sliding on b with low friction. Therefore, in the moving base 10 supported by the sliding column 11, the sliding column 11 slides and the spring force of the four coil springs 12 radially arranged is balanced with the force applied by the earthquake. And moves to the fixed base 9 for seismic isolation. Then, when the acceleration becomes zero due to the earthquake, the moving base 10 returns to the position before the operation by the spring force of the four coil springs 12. As a result, the CP installed on the seismic isolation floor panel 14
It is possible to prevent the U body 2a from collapsing due to an earthquake.

Of course, a single ball bearing or a plurality of ball bearings may be provided at the lower end of the sliding column 11 instead of the disk-shaped low friction member 20. As described above, the seismic isolation floor structure 8 is configured to seismically isolate a part of the computer room 1. Therefore, the construction cost can be reduced, the construction period can be shortened, and the seismic isolation floor structure 8 can be installed in a short period of time. In addition, since the seismic isolation floor structure 8 has a compact structure, it is possible to isolate the floor area according to the size of the equipment to be seismically isolated, and it can be installed in an already constructed building. it can.

In this embodiment, only the CPU body 2a is installed on the seismic isolation floor structure 8 as an example. However, each equipment other than the CPU body 2a can be seismically isolated. Of course, each seismic isolation floor structure 8 may be provided. Seismic isolation unit 1 configured as above
3 can be used alone, but computer room 1
Plural units can be connected according to the floor plan and the size and shape of the equipment to be placed.

Next, a case where a plurality of seismic isolation units 13 are connected and used will be described. In addition, FIG. 7 is a plan view of the seismic isolation floor structure 21 when four seismic isolation units 13 are combined, and FIG. 8 is an enlarged view of one seismic isolation unit 13 for explaining a state in which the seismic isolation units 13 are connected. 8 is a side view for explaining a state in which the seismic isolation units 13 are connected to each other.

The seismic isolation floor structure 21 includes four seismic isolation units 1
Each seismic isolation unit 1 has a configuration in which 3 are arranged in a square shape.
The moving base 10 of No. 3 is connected to the moving bases 10 of the seismic isolation units 13 adjacent to each other via a pair of connecting rods 22. In the present embodiment, the pair of connecting rods 22 in which the moving bases 10 of the seismic isolation units 13 are arranged in parallel with each other.
Are connected to each other in the X and Y directions.

Therefore, the four seismic isolation units 13 can simultaneously perform the seismic isolation operation, and the moving bases 10 of the seismic isolation units 13 can slide in the same direction by the same distance. Therefore, although the four seismic isolation units 13 are each divided, the connecting rods 22 are configured to function as one seismic isolation floor structure.

That is, when the vibration is transmitted to the concrete floor 4 due to the occurrence of an earthquake, the moving bases 10 of the seismic isolation units 13 integrally perform seismic isolation operation and are supported by the four seismic isolation units 13. Seismic isolation floor panel 14
And the sliding panel 17 disposed around it slides relative to the floor panel 5 as one floor.

Therefore, each device installed on the seismic isolation floor panel 14 is prevented from collapsing due to the earthquake by the seismic isolation operation of each seismic isolation unit 13. Thus, by arranging a plurality of seismic isolation units 13 in an arbitrary pattern, a large floor area can be provided as a seismic isolation floor structure, or seismic isolation units 13 can be appropriately installed in a plurality of locations in a large room. It is also possible to arrange. Therefore, the combination of the plurality of seismic isolation units 13 can be set in various combinations depending on the situation of the site where the seismic isolation floor structure 21 is installed.

Further, since a pair of connecting rods 22 are laterally installed between the seismic isolation units 13, there is always a space of a constant width, and this space is effectively used as a space for arranging cables. can do. That is, by arranging cables or the like connected to equipment other than the equipment to be seismically isolated between the connecting rod 22 and the concrete floor 4 which are spaces between the seismic isolation units 13,
Even when the seismic isolation operation of 3 is performed, these cables do not come into contact with the moving base 10, and damage to the cables due to the seismic isolation operation is prevented.

In particular, a plurality of seismic isolation units 1 are installed in an existing building.
When installing 3, the cables already placed under the floor are passed between the connecting rod 22 and the concrete floor 4 to minimize the movement to each cable and to reduce the cost of remodeling work. You can Further, by arranging various cables arranged under the floor below the connecting rod 22, it is possible to prevent the seismic isolation operation of the moving base 10, the sliding column 11, and the coil spring 12 from being disturbed.

For example, as shown in FIG. 10, the moving bases 10 of two seismic isolation units 13 may be connected to each other to form one seismic isolation floor structure 22, or FIG.
As shown in FIG. 3, even if three seismic isolation units 13 are arranged in a hook shape and the moving bases 10 of the three seismic isolation units 13 are connected to each other to form one seismic isolation floor structure 23. good.

In the above embodiment, the seismic isolation floor panel 14 is supported by the panel pillars 15 standing on the upper surface of the moving base 10. However, the present invention is not limited to this.
The seismic isolation floor panel 14 may be placed directly on the upper surface of the. In that case, since the height of the seismic isolation floor structure can be shortened by the amount that the panel support 15 is removed, the seismic isolation floor structure can be thinned.

Although the height of the seismic isolation floor panel 14 can be adjusted by the panel support column 15 in the above embodiment, a damper may be provided instead of the panel support column 15. In that case, since the seismic isolation floor panel 14 is supported by the damper interposed between the moving base 10 and the seismic isolation floor panel 14, the vertical vibration is absorbed by the damper. Therefore, it is possible to produce a floor structure that prevents vertical vibration from propagating to the base-isolated floor panel 14 even when a direct earthquake occurs.

Further, a smooth plate is installed on the upper surface of the moving base 10, and a low friction member is provided at the lower end of the panel supporting column 15, so that the panel supporting column 15 slides on the plate provided on the moving base 10. It may be configured to. In that case, since the movable base 10 can slide horizontally on the fixed base 9 and the seismic isolation floor panel 14 can also slide horizontally on the movable base 10, a more seismic isolation effect can be obtained. Can be increased.

For example, the moving base 10 and the seismic isolation floor panel 1 are set by setting the spring constant for urging the panel support 15 larger than the coil spring 12 for urging the sliding support 11.
4 can be seismically isolated in accordance with the magnitude of the earthquake. For example, when a medium-scale earthquake occurs, the mobile base 10 is isolated and a large-scale earthquake occurs. The seismic isolation operation of the movable base 10 and the seismic isolation floor panel 14 of the mobile base 10 can be performed.

[0048]

As described above, according to the first aspect of the present invention, by making a part of the floor structure consisting of the lower floor and the upper floor a seismic isolation structure, it is possible to perform seismic isolation operation only on the part where seismic isolation is required. Therefore, it is possible to install the floor more easily than the case where the whole floor is seismically isolated, the installation cost can be kept low, and the installation can be done in a short period of time. Moreover, since the structure can be made compact, installation work can be easily performed even in a building already constructed.

According to claim 2, a fixed base,
A seismic isolation unit consisting of a moving base, a pillar that supports the moving base horizontally so that it can move horizontally, and a biasing member that biases the moving base is embedded in the upper floor, which simplifies and reduces the weight of the structure. Installation work can be done easily.

Further, according to claim 3, since a plurality of seismic isolation units are buried in the floor in an arbitrary pattern, the seismic isolation units are isolated according to the floor plan of the room to be installed and the size and shape of the equipment to be placed. The seismic unit installation pattern can be selected as appropriate, and the seismic units can be installed in combination according to the situation.

Further, according to claim 4, since the moving bases of the plurality of seismic isolation units are connected by the connecting member, the plurality of seismic isolation units can simultaneously perform seismic isolation operation, and the vibration due to the earthquake can be prevented. Since it can be distributed to a plurality of seismic isolation units, the seismic isolation effect can be enhanced even when the equipment to be placed is not evenly arranged.

According to the fifth aspect, since the low friction member is provided at the sliding end of the support column, the relative movement of the movable base with respect to the fixed base becomes smooth, and the seismic isolation effect can be further enhanced. it can. Further, according to claim 6, the moving base supports the floor panel provided so as to close the opening formed in the upper floor, whereby the stress of the biasing member can be prevented from acting on the floor panel. Therefore, the equipment placed on the floor panel can be stably supported.

According to claim 7, the edge portion of the floor panel slidably abuts on the upper surface of the upper floor, and the floor panel is laid so as not to interfere with the movement of the moving base. The floor panel can be configured so as not to interfere with the seismic isolation operation.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which an embodiment of a base isolation floor structure according to the present invention is installed.

FIG. 2 is an enlarged perspective view showing a seismic isolation floor structure.

FIG. 3 is a plan view showing the seismic isolation floor structure with the floor panel removed.

FIG. 4 is a side view of a base isolation floor structure.

FIG. 5 is a side view for explaining the configuration of the seismic isolation unit.

FIG. 6 is a side view showing, in an enlarged manner, a mounting state of a sliding strut and a coil spring.

FIG. 7 is a plan view of a seismic isolation floor structure when four seismic isolation units are combined.

FIG. 8 is a plan view showing, in an enlarged manner, one seismic isolation unit for explaining a state where the seismic isolation units are connected to each other.

FIG. 9 is a side view for explaining a state where the seismic isolation units are connected to each other.

FIG. 10 is a plan view of a seismic isolation floor structure in the case where two seismic isolation units are connected.

FIG. 11 is a plan view of a seismic isolation floor structure in which three seismic isolation units are arranged in a hook shape and connected to each other.

[Explanation of symbols]

 1 Computer Room 2 Computer 4 Concrete Floor 5 Floor Panel 6 Support Legs 8, 21, 22, 23 Seismic Isolation Floor Structure 9 Fixed Base 10 Moving Base 11 Sliding Struts 12 Coil Spring 13 Seismic Isolation Unit 14 Seismic Isolation Floor Panel 15 Panel Struts 16 Latching pin 20 Low friction member

Claims (7)

[Claims] 1. A seismic isolated floor structure, wherein a part of a floor structure composed of a lower floor and an upper floor is a seismic isolated structure. 2. The seismic isolation floor structure according to claim 1, wherein a fixed base installed on the lower floor and an upper surface of the fixed base are provided so as to face each other and move relative to the fixed base. A moving base; a support for supporting the moving base horizontally with respect to the fixed base; and a biasing member for biasing the moving base so that the center of the moving base faces the center of the fixed base. A seismic isolation floor structure characterized in that a seismic isolation unit consisting of and is embedded in the upper floor. 3. The seismic isolation floor structure according to claim 1, wherein a plurality of the seismic isolation units are embedded in the floor in an arbitrary pattern. . 4. The seismic isolation floor structure according to claim 3, wherein the plurality of seismic isolation units are connected between the movable bases of adjacent seismic isolation units by a connecting member. 5. The seismic isolated floor structure according to claim 2, wherein the supporting column is provided with a low friction member at a sliding end thereof. 6. The seismic isolated floor structure according to claim 2, wherein the movable base supports a floor panel provided so as to close an opening formed in the upper floor. 7. The seismic isolated floor structure according to claim 6, wherein an edge portion of the floor panel slidably abuts on an upper surface of the upper floor and slides along with the movement of the movable base.