JP6923989B1 - Seismic isolation support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support device having a vibration isolation function, which is compact, has excellent portability, and facilitates construction. SOLUTION: A seismic isolation support device 1 supports a temporary building by a support portion 25. The damper 30 is inserted into the space defined by the outer pipe 11 and the support column 20 with the lower ends supported by the protrusions 10a and 20a. When a lateral load due to seismic force or the like is loaded on the support base 24, the support column 20 is deformed laterally. The annular spring 31 is deformed as the support column 20 is deformed. With the deformation of the annular spring 31, the air filled in the deformable container 32 is discharged to the outside through the ventilation hole 32a, or the air existing outside flows into the deformable container 32 through the ventilation hole 32a. do. Temporary buildings are seismically isolated by this mechanism. [Selection diagram] Fig. 1

Description

The present invention relates to a seismic isolation support device that isolates and supports a temporary unit house or a trailer house.

Temporary facilities such as temporary housing and mobile homes installed in the event of a disaster require prescribed habitability and seismic performance. Therefore, when setting up, a concrete foundation is laid on the ground, and after the concrete has hardened, the concrete foundation It is preferable to fasten to the anchor bolts embedded in the concrete in advance. However, in consideration of the need to set up these temporary facilities in a short period of time and the withdrawal and relocation after use, many structures supported by jacks and concrete blocks have been adopted.

In most cases, the support structure that supports the temporary facility with jacks and concrete blocks does not have sufficient countermeasures against earthquakes. In addition, it cannot be denied that there is a possibility that large shaking will occur during an earthquake, lateral displacement will occur with the support structure, or the temporary facility will separate from the support structure and collapse.

Patent Document 1 proposes a seismic isolation foundation structure using tires. Specifically, a plurality of tires with wheels filled with a filler inside a steel pipe erected on the bottom plate are stacked, a hydraulic cylinder is inserted in the center thereof, and the lower end of the hydraulic cylinder is used as the bottom plate. A seismic isolation mechanism is constructed by fixing the upper end to the uppermost wheel, and a skeleton support portion that supports the lower end of the building is provided above the seismic isolation mechanism.

Utility Model Registration Bulletin No. 3209447

However, in the seismic isolation basic structure proposed in Patent Document 1, since it is necessary to stack a plurality of tires filled with a filler in a steel pipe, the scale of the seismic isolation basic structure has to be increased. No. Moreover, since the hydraulic cylinder is inserted into the stacked tires, the construction is not always easy.

The present invention has been made by paying attention to these problems, and provides a support device which is compact, has excellent portability, and has a seismic isolation function that facilitates construction.

The invention for solving the above problems is a seismic isolation support device for supporting a temporary building, which is fixed to the outer cylinder and the outer cylinder and is housed in the outer cylinder along the direction in which the outer cylinder extends. The damper is provided with a support extending by the support, a damper in contact with both the outer cylinder and the support, and a support portion supported by the support to support a temporary building, and the damper is characterized by having a thin plate-shaped spring. ..

Due to the initial motion of the earthquake, the temporary building is impacted and tries to suddenly displace to the side. At the same time, the stanchions that support the temporary structure via the support part also try to suddenly displace laterally. At this time, the plate-shaped spring that comes into contact with both the outer cylinder and the strut expands and contracts with the displacement of the strut. Due to the elasticity of this plate-shaped spring, the sudden change in displacement speed of the temporary building is mitigated at the moment of impact. That is, according to this configuration, the seismic isolation effect of the damper can be obtained by displacing the columns supporting the temporary building via the support portion.

Here, the temporary building is a building that is temporarily installed. Specifically, it is a temporary house used in the event of a disaster, a construction site office, a trailer house, etc.

Preferably, the plate-shaped spring is an annular spring in which a plurality of plate-shaped springs are arranged in the circumferential direction of the column.

According to this configuration, since the plate-shaped spring is an annular spring in which a plurality of plate-shaped springs are arranged in the circumferential direction of the support column, the support column can be supported equally in the circumferential direction.

Preferably, the shape of the annular spring in a plan view is one of a circle, an ellipse, an oval, and a polygon.

According to this configuration, the shape of the annular spring in a plan view is any of a circle, an ellipse, an oval, and a polygon. It can be set in a timely and appropriate manner.

Preferably, the damper has a deformable container that deforms with the deformation of the annular spring, and the deformable container is characterized in that a vent for passing air is defined.

According to this configuration, as the annular spring is deformed, the air existing in the deformed container and the air existing outside the deformed container move to each other through the ventilation holes. Since the impact energy caused by the earthquake is absorbed by the air resistance when passing through the ventilation holes, the impact on the temporary building can be mitigated. Furthermore, due to the damping effect when air passes through the ventilation holes, the vibration caused by the seismic motion after the temporary building is impacted can be damped at an early stage.

Preferably, the support portion is characterized in that the support height can be adjusted.

According to this configuration, since the support height of the support portion can be adjusted, the level of the temporary building can be easily maintained even if the height of the ground on which the temporary building is installed is different.

Preferably, a part or all of the outer cylinder is buried in the ground.

According to this configuration, since the temporary building is supported in a state where a part or all of the outer cylinder is buried in the ground, it is possible to avoid an event in which the temporary building moves laterally or is blown by a strong wind.

It is a side sectional view of the seismic isolation support device. The same is a plan sectional view. It is a figure explaining the usage mode of the seismic isolation support device. It is a figure explaining the modification of the usage mode of the seismic isolation support device. It is a figure explaining another modification of the use mode of the seismic isolation support device.

Hereinafter, embodiments of the seismic isolation support device will be described in detail with reference to FIGS. 1 and 2.

As shown in FIG. 1, the seismic isolation support device 1 has an outer cylinder 10, a support column 20, a support portion 25, and a damper 30. The outer cylinder 10 has a cylindrical outer pipe 11 and a disk-shaped bottom plate 12 that closes one end of the outer pipe 11. In the present embodiment, the outer tube 11 and the outer edge of the bottom plate 12 coincide with each other in a plan view, but the bottom plate 12 may be a flat plate extending toward the outer region of the outer tube 11.

The support column 20 is a cylinder, and one end of the support column 20 is supported in a state of being fixed to a bottom plate 12 constituting the outer cylinder 10, and extends vertically upward. The outer pipe 11 and the support column 20 are located concentrically in a plan view. The outer diameter of the support column 20 is smaller than the inner diameter of the outer tube 11, and almost the entire support column 20 is housed in the outer tube 11, but the other end of the support column 20 is the other end of the outer tube 11 in a side view. It slightly protrudes from the end. In the present embodiment, the outer tube 11 and the support column 20 are cylindrical, but may be an elliptical cylinder, a long cylinder, or a square cylinder.

The support portion 25 has a pedestal 21, a height adjusting nut 22, a bolt 23, and a support base 24. The pedestal 21 is a substantially disk-shaped member provided with a circular hole 21a in the center and a flange 21b at the edge, and is fixed to the other end of the support column 20. The center of the circle of the pedestal 21 and the hole 21a coincides with the center of the support column 20. The diameter of the outer edge of the pedestal 21 is set to be larger than the diameter of the outer edge of the outer tube 11. That is, the pedestal 21 is in a state of covering the outer tube 11 in a plan view.

The collar portion 21b extends vertically downward from the outer edge of the pedestal 21. Further, the height from the bottom plate 12 to the end of the flange portion 21b is set to be smaller than the height from the bottom plate 12 to the upper end of the outer pipe 11. As a result, when the support column 20 is largely displaced laterally, the flange portion 21b and the outer pipe 11 come into contact with each other. As a result, the lateral displacement of the column 20 is constrained.

The height adjusting nut 22 is fixed to the pedestal 21 and the bolt 23 is screwed into the height adjusting nut 22. The bolt 23 penetrates the hole 21a. The upper end of the bolt 23 supports the support base 24 in a rotatable state. Therefore, by rotating the bolt 23, the support base 24 moves in the vertical direction. Since the support base 24 is supported so as to be rotatable by the bolt 23, the support base 24 does not rotate in synchronization with the rotation of the bolt 23.
Further, in order to facilitate the rotation of the bolt 23, a rod member protruding in the horizontal direction may be fixed to the bolt 23.

The damper 30 is inserted into the space defined by the outer pipe 11 and the support column 20 with the lower ends supported by the protrusions 10a and 20a. Further, the height from the bottom plate 12 to the upper end of the damper 30 is set to be substantially the same as or slightly lower than the height of the upper end of the outer pipe 11.

The protrusion 10a is an annular thin plate fixed to the outer tube 11 and projecting vertically in the direction of the support column 20. The protrusion 20a is a ring-shaped thin plate that is fixed to the support column 20 and projects vertically toward the outer tube 11. Further, the heights of the protrusion 10a and the protrusion 20a are the same.

As shown in FIG. 2, the damper 30 has nine annular springs 31 and a deformable container 32 that is housed in contact with the annular springs 31. The annular spring 31 is a cylindrical thin plate connected to both the outer tube 11 and the support column 20. Further, the annular springs 31 are in contact with each other.

In the present embodiment, the shape of the annular spring 31 in a plan view is illustrated as a circle, but it may be an ellipse, an oval, or a polygon.

The deformable container 32 is a bag made of a thin film, and a vent hole 32a for passing air is defined at the lower end portion. The side surface is in contact with the annular spring 31.

When a lateral load due to seismic force or the like is loaded on the support base 24, the support column 20 is deformed laterally. The annular spring 31 is deformed as the support column 20 is deformed. With the deformation of the annular spring 31, the air filled in the deformable container 32 is discharged to the outside through the ventilation hole 32a, or the air existing outside flows into the deformable container 32 through the ventilation hole 32a. do.

The usage mode of the seismic isolation support device 1 will be described with reference to FIG.

The seismic isolation support device 1 supports the four corners of the temporary house 100 with almost all of the outer pipe 11 buried in the ground 110. That is, a part of the outer pipe 11 and the support portion 25 project from the ground 111. The support height of the temporary house 100 is adjusted by rotating the bolt 23. By fixing the connecting plate 120 to both the temporary house 100 and the support portion 25 with screws, the temporary house 100 is fixed to the support portion 25 via the connecting plate 120.

By burying the outer pipe 11 in the ground 110, the seismic isolation support device 1 is firmly fixed in the ground 110. As a result, it is possible to avoid an event such as the temporary house 100 moving sideways or falling due to a strong wind or rolling motion of an earthquake.

The outer pipe 11 can be buried in the underground 110 only by human power using a double-acting scoop. Specifically, by inserting the outer pipe 11 into a vertical hole dug using a double-acting scoop, it can be easily buried in the underground 110. When the ground is hard, it is preferable to use an earth drill and a double-acting scoop together.

The temporary house 100 is impacted by the initial motion of the earthquake, but the elasticity of the annular spring 31 alleviates the sudden change in the displacement speed of the temporary house 100 itself at the moment of the impact. Further, as the annular spring 31 is deformed, the air existing in the deformable container 32 and the air existing outside the deformable container 32 move to each other via the ventilation holes 32a. Since the impact energy caused by the earthquake is absorbed by the air resistance when passing through the ventilation hole 32a, the impact received by the temporary house 100 can be mitigated. Further, due to the damping effect when the air passes through the ventilation holes 32a, the vibration caused by the seismic motion after the temporary house 100 is impacted can be damped at an early stage.

The present embodiment and the mode of use are examples, and it goes without saying that they can be modified without departing from the technical idea of the present invention.

In this usage mode, the case of supporting the temporary house 100 is illustrated, but the trailer house 200 to which the wheels 220 are attached may be supported. In this case, as shown in FIG. 4, it is preferable to accommodate the wheels 220 in the pit 170 provided on the ground 111 to lower the support height of the trailer house 200. This is because the burial depth of the outer pipe 11 can be increased. Further, since the height difference between the trailer house 200 and the ground 111 can be reduced, it becomes easy to come and go to the trailer house 200.

The pit 170 is preferably defined by a concrete plate. This is because the original shape can be maintained without the ruts becoming muddy due to the influence of rainfall. Further, it is preferable to provide a drainage device for draining the water accumulated in the pit 170.

Further, as shown in FIG. 5, the seismic isolation support device 201 may be placed on the ground 111 to support the trailer house 200. As a result, the trailer house 200 can be stably supported only by installing the seismic isolation support device 201 at the stop position of the trailer house 200. In this case, the wheel 220 is in contact with the flat ground 111. The bottom plate 212 projects to the outside of the outer pipe 11 in order to stabilize the seismic isolation support device 201, and the outer pipe 11 is fixed to the bottom plate 212 via the support member 213.

The vibration isolation support device of the present invention has great industrial applicability because a temporary house and a trailer house having a vibration isolation function can be easily set up at an earthquake disaster site where aftershocks are a concern.

1, 201: Seismic isolation support device 10: Outer cylinder 20: Support column 30: Damper 31: Circular spring 32: Deformed container 32a: Vent hole 100: Temporary house (temporary building)
110: Underground 200: Trailer house (temporary building)

Claims (6)

A seismic isolation support device that supports temporary buildings
With the outer cylinder
A strut fixed to the outer cylinder and extending along the direction in which the outer cylinder extends while being housed in the outer cylinder,
A damper that contacts both the outer cylinder and the support column,
A support portion that is supported by the support column and supports the temporary building is provided.
The damper is a seismic isolation support device having a thin plate-shaped plate-shaped spring. The vibration isolation support device according to claim 1, wherein the plate-shaped spring is an annular spring in which a plurality of plate-shaped springs are arranged in the circumferential direction of the support column. The vibration isolation support device according to claim 2, wherein the shape of the annular spring in a plan view is any of a circle, an ellipse, an oval, and a polygon. The second or third aspect of the present invention, wherein the damper has a deformable container that deforms with the deformation of the annular spring, and the deformable container has a vent hole for passing air. Anti-vibration support device. The vibration isolation support device according to any one of claims 1 to 4, wherein the support portion can adjust the support height. The vibration isolation support device according to any one of claims 1 to 5, wherein a part or all of the outer cylinder is buried in the ground.

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