JP2019127704A - Floor base isolation system - Google Patents

Abstract

To realize a floor base isolation system according to the use of equipment and facilities with a simple mechanism.SOLUTION: A floor base isolation system comprising sliding seismic isolation having a plurality of friction regions, wherein a low friction region and a high friction region are arranged adjacent to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to floor isolation technology. In particular, it relates to partial seismic isolation in a test facility, a factory, or a drug storage.

Several floor isolation technologies have been proposed. For example, there is a seismic isolation system (see FIG. 7) provided with a mechanism that slides on a floor to suppress the acceleration input to the device and rides on the non-slip floor to stop.
Several other proposals have been made.
Patent Document 1 JP-A-2015-10377 includes a structural floor, a seismic isolation floor provided above the structural floor, and a seismic isolation device provided between the structural floor and the seismic isolation floor. A floor isolation system comprising: a base isolation device comprising a support for seismically supporting the base and the damping member for damping vibration due to relative displacement between the structural floor and the base in the horizontal direction An oil damper is used to provide an oil damper in which the damping force generated at a displacement larger than a predetermined displacement is larger than the damping force generated at a displacement smaller than a predetermined displacement to prevent excessive deformation while maintaining the ability to suppress response acceleration. A seismic isolation floor system (see FIG. 8) is disclosed.
Patent Document 2 JP 2008-106583A discloses a plurality of double beds 5, a walkway floor 7 and a normal floor movably supported on a foundation 3 via a hard sliding bearing 23 or a rolling bearing 29, respectively. A joint body 11 which allows movement of the body 9, the adjacent double floor body 5, the walkway floor body 7 and the normal floor body 9 to each other and restricts the movement in the lateral direction, and a part of the weight A coil spring 13 that is interposed between the floor 5, the corridor floor 7, and the normal floor 9 and the foundation 3 and performs restoration, and the heavy floor 5, the corridor floor 7, and the normal floor 9 are When supported by a plurality of rigid sliding bearings 23 or rolling bearings 29, they are constituted by the same type of rigid sliding bearings 23 or rolling bearings 29 and suppress amplification of micro vibrations and are stable against small and medium earthquakes. Disclosed a floor isolation system capable of demonstrating seismic performance It is done.
Patent Document 3 In Japanese Patent Application Laid-Open No. 2005-307695, a floor slab 2 having a square shape in plan view is placed on a beam 1 made of H-shaped steel installed between columns 5 and 5, and the floor slab 2 is a beam It is possible to slide horizontally on 1 top. The floor slab 2 and the beam 1 are connected by a rubber band 3 made of natural rubber or in the form of a bar or strip, and one end of the rubber band 3 is provided at a corner of the lower surface of the floor slab 2 and is downward The other end is fixed to the side surface 1 a of the central portion of the beam 1. A friction member 4 made of polytetrafluoroethylene is attached to the upper surface of the beam 1 to adjust the friction damping force when the floor slab 2 is moved horizontally and to prevent noise during movement. In addition, when the floor slab 2 moves in the horizontal direction, a clearance 6 is provided at the joint portion between the floor slab 2 and the columns 5 so that the floor slab 2 does not collide with the columns 5. A floor isolation system that does not change in size is disclosed.
Japanese Patent Laid-Open No. 10-176380 discloses a floor seismic isolation device in which a floor seismic isolation device 12 is disposed on a structural floor 11 of a building 10 and a seismic isolation floor 13 is disposed on the floor seismic isolation device 12. In structure 1, a floor isolation device mounting structure is disclosed in which a recess 15 is formed in a structural floor 11 and a floor isolation device 12 is disposed in the recess 15 so that the floor height can be lowered.
In the present invention, the floor directly under the equipment is seismically isolated with a low-friction sliding material, and the work floor installed around the equipment is configured with a high-friction sliding material and damping material, so that there is no wall around the equipment. In this case, a damping mechanism can be added, and the difference between the work floor and the floor directly below the equipment can be eliminated.

Unexamined-Japanese-Patent No. 2015-10377 JP 2008-106583 A JP 2005-307695 A JP 10-176380 A

  An object of the present invention is to realize a floor isolation system suitable for applications such as equipment and facilities with a simple mechanism.

The present invention forms a simple partial floor seismic isolation system by combining a low friction region and a high friction region by a slip isolation mechanism, and makes abutment from the low friction region to the high friction region in order to absorb the seismic energy gently. It is an invention.
(1) A floor isolation system comprising a slide base isolation system having a plurality of friction areas, wherein a low friction area and a high friction area are disposed adjacent to each other.
(2) The floor isolation system according to (1), wherein a floor area having high friction in stages is arranged from the low friction area toward the non-base isolation area.
(3) The floor isolation system according to (1) or (2), wherein there is a gap in the adjacent friction area, and an air gap and / or a damping material is disposed in the gap.
(4) The floor isolation system according to any one of (1) to (3), wherein the sliding member constituting the friction area is a sliding member whose friction property is adjusted by surface processing.
(5) The floor seismic isolation as described in any one of (1) to (3), wherein the sliding material constituting the friction region is a sliding material whose friction is adjusted by a combination of beads and a lubricant. system.
(6) The floor isolation system according to any one of (3) to (5), wherein the damping material is an elastic body and / or a gel body.
(7) A room having a flat floor surface on which the floor isolation system according to any one of (1) to (6) is disposed.
(8) A building having a room in which the floor isolation system according to any one of (1) to (6) is disposed.
(9) A floor isolation method using a floor isolation system in which a low friction area and a high friction area slide isolation are arranged adjacent to each other by changing a friction coefficient, and the low friction area is brought into contact with the high friction area during an earthquake A floor seismic isolation method characterized by absorbing seismic energy.

1. The present invention realizes a floor isolation system configuration by combining a low friction area and a high friction area having different friction performances by using a slide isolation mechanism which is a simple mechanism. By providing the low friction area and the high friction area, the low friction area and the high friction area are sequentially brought into contact with each other so that the seismic energy is smoothed, so that damage to the devices provided in the low friction area is reduced.
2. By setting multiple friction coefficients in stages, the absorption of seismic energy can be made smoother. The coefficient of friction can be set according to the equipment targeted for seismic isolation.
By setting the high friction area as a work space or a passage for workers and setting the floor surface to a fixed or minute shaking in an intermediate-scale earthquake, it is possible to safely take measures against earthquakes.
3. By providing an air gap and / or a damping material between the low friction area and the high friction area, it is possible to cope with the magnitude of the earthquake received. Furthermore, by adjusting the function of the friction area to several types, it is possible to add a function to flexibly receive the shock absorption of the earthquake.
For example, in a small earthquake, the low friction region absorbs with an amplitude within the width of the gap. In a slightly large earthquake, the high frictional area is fixed by absorbing the compression to the damping material. Furthermore, in the case of a large earthquake, it moves to a high friction area and absorbs. In larger earthquakes, we accept in fixed areas. Finer control can be achieved by interposing a damping material in addition to the air gap between the fixed area and the high friction area. The transition between the low friction area and the high friction area can also be controlled more finely by providing a medium friction area to make the friction coefficient finer.
By providing a plurality of friction areas, clearance (clearance) can be made smaller than when dealing with one seismic isolation mechanism. Also, when adding a home return function and a damping function, no wall is required around the seismic isolation floor.
It is a seismic isolation system that can be easily applied to non-base-isolated buildings.
4. By using a slide isolation mechanism with a controlled coefficient of friction without using equipment such as a damper, it can be made thinner and the level can be made the same as the fixed floor surface or the level difference can be made smaller. There is no need to arrange equipment under the finish floor. It can be realized by a very simple mechanism, and there is very little decline in availability. The friction is adjusted by combining the material of the friction plate, roughening of the friction surface, an additive such as paint, spheres such as beads, lubricants such as grease, and the like.
5. As the damping material, a material that can be made thin, such as a rubber body, a urethane rubber, an elastic foam, or a gel body is adopted. This eliminates the need for mechanical damping mechanisms that require height.
6. According to the present invention, since the sliding base isolation mechanism is used, it can be thin, and there can be no level difference between the base isolation floor and the work floor, and it can be flat.
7). The present invention can be applied to places where high-performance seismic isolation is not required or where it is necessary to further absorb shock even in a seismic isolation building, although damage may occur at the time of earthquake in seismic resistance.
For example, it is suitable for a room or a building provided with equipment and instruments such as precision equipment such as semiconductor manufacturing equipment, inspection / measurement equipment, medicine racks and medicine storage.
The floor of the equipment and the floor for workers are formed flat by setting the place where the equipment and equipment are placed as a low friction area and the high friction area as a work floor and a passage.

Figure showing the embodiment of multi-functional floor isolation Figure showing the implementation of multi-functional floor isolation with clearance Diagram showing an implementation of multi-function seismic isolation with damping material A schematic diagram of a room with multiple multi-functional floor isolation systems Example of sliding seismic isolation mechanism Example of sliding seismic isolation mechanism Figure showing a conventional example of sliding floor isolation The figure which shows the prior art example of patent document 1 statement.

The present invention is a floor isolation system in which low friction areas and high friction areas having different friction performances are combined by using a slide isolation system which is a simple mechanism. The floor isolation system was constructed by adjusting the sliding property between the upper sliding floor and the lower fixed plate to provide a low friction area and a high friction area. According to this configuration, in the case of an earthquake, the low-friction region to the high-friction region are sequentially brought into contact with each other to gently absorb the seismic energy, thereby reducing the damage to the devices provided in the low-friction region.
By arranging the air gap and the damping material between the low friction area and the high friction area, it is possible to softly absorb the shock of the earthquake. Furthermore, by setting the friction area in multiple stages, it is possible to gently absorb the shock of earthquakes.
Since the present invention can be applied to buildings that are not subjected to earthquake countermeasures, earthquake-resistant buildings, and the like, and is a sliding seismic isolation mechanism that can be thinned, a flat floor surface can be formed, and workability does not deteriorate.
There are the following materials for adjusting the friction mechanism.
The sliding material includes an embossed steel plate, a micro uneven surface forming steel plate, a protrusion, a protrusion for point contact, a bead, and the like.
As the sliding material, polyamide, polyimide, urethane acrylate, graphite, grease or the like can be used.
The damping material uses an elastic body or a material that is plastically deformed. Natural rubber or resin rubber is used as the elastic body. For example, urethane can be used. The material to be plastically deformed may be foam or glass fiber filled plastic. Alternatively, a bag or the like in which a gel or the like is sealed can be used.

Embodiment 1 of the present invention is shown in FIG.
In the drawing, the seismic isolation mechanism is provided directly on the slab 5, but is shown in a simplified manner. The sliding seismic isolation mechanism is provided according to each installation environment such as a double floor or a finished floor.
It is an example of a multifunctional floor seismic isolation system A in which a low friction area 1 and a high friction area 2 are disposed adjacent to each other on a slab 5. (A) A figure is an elevation, (b) A figure is a top view.
The low friction region 1 has a configuration in which a low friction sliding member 11 is disposed on a slab 5 and a sliding floor plate 12 is placed thereon. The high friction region 2 has a structure in which a high friction sliding member 21 is disposed and a sliding floor plate 22 is placed thereon.
In this low friction area 1, equipment and devices 6 are installed. The high friction area 2 is a space where the worker etc. 7 work or move. The low friction sliding member 11 is set to have lower friction than the high friction sliding member 21.
In this example, when the sliding floor plate 12 in the low friction region 1 moves, the sliding floor plate 22 in the high friction region 2 moves to ameliorate the impact when the sliding floor plate 12 abuts on the high friction region 2 and stops or has a large impact.

Embodiment 2 of the present invention is shown in FIG.
In addition to the configuration of the first embodiment, a clearance (air gap) 4 is disposed between the low friction region 1 and the high friction region 2.
In this example, the sliding floor plate 12 in the low friction area 1 moves, and the impact of a small scale earthquake stops within the clearance. When a large impact is received, the sliding floor plate 22 in the high friction area 2 moves to ameliorate the impact when the high friction area 2 abuts against the high friction area 2 and stops or the impact is large.

Embodiment 3 of the present invention is shown in FIG.
In addition to the configuration of the second embodiment, the damping material 3 is disposed on the high friction region 2 side of the clearance (gap) 4 disposed between the low friction region 1 and the high friction region 2, and further outside the high friction region 2. The clearance 4 is arranged.
In this example, the sliding floor plate 12 in the low friction area 1 moves, and the impact of a small scale earthquake stops within the clearance. When a large impact is received, the impact is absorbed by coming into contact with the damping material 3, and a large earthquake impact is stopped by coming into contact with the high friction area 2 or the sliding floor plate 22 of the high friction area 2 moves when the impact is large. This will alleviate the impact. Then, when the impact further exceeds the clearance 4 outside the high friction area 2, it is transmitted to the fixed area (non-seismic area) 9.
In this way, a floor isolation system that mitigates the impact is built in several stages according to the magnitude of the impact of the earthquake.

  The damping material 3 can be disposed between the low friction region 1 and the high friction region 2 without providing the clearance 4. In that case, the impact exceeding the low friction region 1 is transmitted to the damping material 3, and the range that can be absorbed by the ability of the damping material is suppressed by deformation of the damping material, and the impact exceeding that is transmitted to the high friction region 2 and adjusted. .

Embodiment 4 is shown in FIG. FIG. 4 schematically shows a multifunctional seismic isolation floor system room B in which a plurality of multifunctional floor seismic isolation systems A are arranged in a factory or a construction.
In this example, four multi-function floor seismic isolation systems A set according to the target devices and equipment are arranged. Thus, the multifunctional floor seismic isolation system A can be designed and arranged as necessary.

<Example of slip isolation mechanism>
An example of the slip isolation mechanism is shown in FIG. 5 (a) shows a bead / grease friction adjusting mechanism 81, FIG. 5 (b) shows a sliding surface mechanism 82, FIG. 5 (c) shows an embossing mechanism 83, and FIG. 5 (d) shows a slippery material adhering mechanism 84. Since any of these sliding isolation mechanisms can be thinned, the floor isolation mechanism can be formed substantially flat.
The bead and grease friction adjusting mechanism 81 shown in FIG. 5A is a mechanism for adjusting the sliding performance between the slab 8b and the sliding floor plate 8a by utilizing the sliding property of the bead 81a and the resistance of the grease 81b. This mechanism was installed in the lower casing 81c and the upper casing 81d. The lower housing 81c is larger than the upper housing 81d to define a movement allowance of the upper housing 81d.
The lower housing 81c is placed on the upper surface of the slab 8b and the like, the upper housing 81d is fixed to the lower surface of the sliding floor plate 8a, and the beads 81a and grease 81b are enclosed between the lower housing 81c and the upper housing 81d. .
It is a mechanism that adjusts the slip resistance by combining the rolling property of the bead 81 a and the viscosity of the grease 81 b. The beads may be made of resin or steel, and the diameter may be reduced. The difference in size between the upper and lower housings is the shock absorption difference. The impact exceeding the difference between the upper and lower casings is absorbed by the adjacent high friction region.

The slide surface mechanism 82 shown in FIG. 5 (b) has a slide mechanism in which a slide material 82a is placed on a steel plate etc. 82b and the space between the slide material 82a and the slide plate 82c is interposed between the lower slab 8b and the slide floor plate 8a. To do. It is a method of selecting the slip material and adjusting the slip property.
As the sliding material, polyamide, polyimide, urethane acrylate, or the like can be used.

The emboss mechanism 83 shown in FIG. 5C is a method of utilizing a sliding surface 83c which is brought into a point contact state by embossing a steel plate or the like. Adjust the slip according to the degree of embossing.
The steel plate or the like on which the embossed layer 83a is formed is fixed to the sliding floor plate 8a, and is interposed between the sliding floor plate 8a and the slab 8b to constitute an embossing mechanism 83.

  The slippery material adhesion mechanism shown in FIG. 5 (d) is a method in which the slippery material 84a is adhered to the lower steel plate 84b or the upper steel plate or the like arranged above and below to form a sliding surface 84c between the upper and lower steel plates. is there. The example shown in FIG. 5D is an example in which a lower steel plate or the like 84b having a slidable material 84a attached thereto is placed on a slab 8b, and a load supporting portion 84d is formed on the lower surface of the sliding floor plate 8a. A sliding surface 84c is formed between the load support portion 84d and the lower steel plate or the like 84b to which the slidable material 84a is attached. The sliding material is polyamide, polyimide, urethane acrylate or the like. Select and adjust the slip material to be attached.

An example of another sliding mechanism is shown in FIG.
6 (a) shows graphite lubrication using a graphite coating (1), FIG. 6 (b) shows graphite lubrication using a graphite mixed mortar (2), and FIG. 6 (c) shows a cast iron load supporting portion 87. It is a means to use.
In these illustrated examples, the load support portion is provided on the lower surface of the sliding floor plate 8a.
Graphite lubrication (1) 85 using a graphite coating is provided with a graphite film layer 85a on the slab 8b, and a load supporting portion 85b on the lower surface of the sliding floor plate 8a at the upper portion, and the graphite film layer 85a and the load supporting portion A sliding surface 85c is formed between 85b.
The graphite lubrication (2) 86 is provided with a graphite-containing mortar layer 86a on the slab 8b and a load support portion 86b on the lower surface of the upper sliding floor plate 8a, and between the graphite-containing mortar layer 86a and the load support portion 86b. A sliding surface 86c is formed.
The cast iron load supporting portion 87 is configured such that the sliding floor plate 8a provided with the cast iron load supporting portion 87b on the lower surface is placed on the slab 8b, and the upper surface of the slab 8b is a sliding surface 87c.

(Damping material)
The damping material uses an elastic body or a material that is plastically deformed. When a rubber elastic body is used, there is compression and repulsion, so it has a return action by pushing back the pressure due to the impact of the earthquake. A material that deforms plastically absorbs compression.
The elastic body uses natural rubber or resin rubber. For example, urethane can be used. The material to be plastically deformed may be foam or glass fiber filled plastic. Alternatively, a bag or the like in which a gel or the like is sealed can be used.
Since the present invention utilizes a sliding seismic isolation that changes in stages, equipment and devices can be easily returned to the origin by pushing back after the earthquake has settled.
The damping body of the present invention can be used in combination with an elastic body and a material that undergoes plastic deformation.

  The present invention is applied to the portion most desired to be seismically isolated. For example, a low friction area with a low coefficient of friction is applied to the part of the floor where the equipment to be isolated is installed. Then, a high friction area with a high coefficient of friction is applied to a floor surface for operating the device, which is a portion that does not need to be seismically isolated (a portion that does not want to move). A damping material can be used in the high friction area to add damping effect. According to this configuration, the low friction area slips during an earthquake and collides with the high friction area, and the high friction area absorbs an impact to exhibit a damping effect.

A Multifunctional floor seismic isolation system B Multifunctional seismic floor system room 1. Low friction area Low friction sliding material12. Sliding floor board2. High friction area 21. High friction sliding material 22. Sliding floor

3. Damping material

4. Clearance 5. Slab

6. Equipment and equipment7. Workers etc. Sliding bed mechanism 8a. Sliding floor plate 8b. Slab 81. Bead / grease friction adjusting mechanism 81a. Beads 81 b. Grease 81c. Lower housing 81 d. Upper housing

82. Sliding surface mechanism 82a. Slip material 82b. Steel plates etc. 82c. Sliding surface

83. Embossing mechanism 83a. Embossed layer

83c. Sliding surface

84. Sliding material adhesion mechanism 84a. Sliding material 84b. Lower steel plate etc. 84c. Sliding surface 84d. Load support 85. Graphite lubrication (1)
85a. Graphite film layer 85b. Load support portion 85c. Slip surface 86. Graphite lubrication (2)
86a. Graphite-mixed mortar layer 86b. Load support portion 86c. Sliding surface 87. Cast iron load support 87b. Cast iron load support 87c. Sliding surface

9. Fixed area

Claims (9)

  What is claimed is: 1. A floor isolation system comprising a slide base isolation system having a plurality of friction areas, wherein a low friction area and a high friction area are disposed adjacent to each other.   The floor isolation system according to claim 1, characterized in that a floor area having high friction in stages is arranged from the low friction area toward the non-base isolation area.   The floor isolation system according to claim 1 or 2, wherein there is a gap in the adjacent friction area, and an air gap and / or a damping material is disposed in the gap.   The floor isolation system according to any one of claims 1 to 3, wherein the sliding member constituting the friction area is a sliding member whose friction is adjusted by surface processing.   The floor seismic isolation system according to any one of claims 1 to 3, wherein the sliding material constituting the friction region is a sliding material whose friction property is adjusted by a combination of beads and a lubricant.   The floor isolation system according to any one of claims 3 to 5, wherein the damping material is an elastic body and / or a gel body.   A room characterized in that a floor surface on which the floor isolation system according to any one of claims 1 to 6 is disposed is flat.   The building which provided the room which arrange | positioned the floor seismic isolation system in any one of Claims 1-6.   A floor seismic isolation method using a floor seismic isolation system in which a low friction area and a high friction area slip isolation are arranged adjacent to each other by changing the friction coefficient, and the low friction area is brought into contact with the high friction area during an earthquake. A floor isolation method characterized by absorbing seismic energy.

Images