JPH033727Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a seismic isolation device installed in a building.

[Prior art and its problems]

The major causes of relative displacement between a building and its foundation are earthquakes, while minor causes include vibrations from traffic and wind, and each must be dealt with accordingly.

In other words, if a building is supported by a flexible structure that can be displaced by a foundation, it is necessary to maintain a high degree of rigidity by strengthening the bonding state against slight vibrations caused by traffic or wind, while On the other hand, making it possible to displace it will prevent major damage.

By the way, as a method to enable relative displacement between the building and the foundation, the building is installed on the foundation with laminated rubber, springs, and bearings interposed. ,
When a large displacement occurs due to an earthquake, etc., a means to absorb the amount of displacement and contain it in a short period of time is also required.

As a means for suppressing displacement, it is possible to connect the building and the foundation by connecting members to each other, so that when the displacement exceeds a certain level due to an earthquake or the like, the edges of the joints between the members are severed.

In addition, as a means to absorb the displacement that has already occurred, a shock absorber such as a jack or an elastic body is provided, and when the displacement exceeds a certain level, this jack or elastic body acts to block the displacement energy. Many things have been proposed.

However, there was no one that could provide a detailed response that could both suppress and absorb displacement.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
It is an object of the present invention to provide a seismic isolation device having a simple structure that can be displaced only in response to a strong shock caused by an earthquake, and that acts effectively to attenuate the shock.

[Means to resolve the problem]

In order to achieve the above-mentioned object, the present invention has a pillar-shaped projection on the building side and a pillar-shaped projection on the foundation side facing each other, and a U-shaped metal body with an opening facing sideways is installed horizontally on one of the pillar-shaped projections. A metal plate is attached to the other columnar protrusion so as to protrude horizontally, and the tip of the metal plate is inserted into the U-shaped metal body through the opening, and a pressing force is applied into the U-shaped metal body. The gist of this method is to interpose a controllable pressing means such as an air spring or a jack, and use this pressing means to press the U-shaped metal body and the metal plate into contact with each other.

[Effect]

According to the present invention, the pressing force of the pressing means is increased to press the U-shaped metal body and the metal plate against weak vibrations. In this way, the building and the foundation can be firmly connected by combining the U-shaped metal body and the metal plate.

On the other hand, when a large displacement occurs due to an earthquake,
If the pressing force of the pressing means is lowered, the metal plate moves while creating friction against the metal body, and at that time, the frictional force is consumed as thermal energy generated when metals rub against each other, and this is consumed. Since there is energy, the relative displacement gradually decreases.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical side view showing one embodiment of the seismic isolation device of the present invention, and FIG. 2 is a plan view of the main part. In the figure, 1 is a building and 2 is a foundation that supports this building 1. In the figure, 3 indicates a columnar protrusion of the building 1, and 4 indicates a columnar protrusion of the foundation 2. As shown in Fig. 3, the foundation 2 and the building 1 are not rigidly connected and are movable; one example is a laminated rubber shoe with a steel plate interposed in a rubber column between them. 5 etc. may be used.

A U-shaped metal body 6 is horizontally protruded from the columnar projection 3 on the side of the building 1 with its opening 6a facing sideways, so that it can follow the vertical movement of the building 1. That is, the attachment member 7 of the metal body 6 is made to be able to slide within the vertical blind groove 8 of the columnar projection 3, as shown in FIG.

Further, as shown in FIG. 4, a mounting member 10 provided at the other end of the support rod 9 whose one end is rotatably mounted above the columnar projection 3 is attached to a bag groove formed horizontally on the upper surface of the metal body 6. 11, and the U-shaped metal body 6 is suspended and supported by the support rod 9.

On the other hand, the columnar protrusion 4 on the foundation 2 side also has a vertical blind groove 8.
The mounting member 7 is slidably inserted into the mounting member 7, and the metal plate 13 is horizontally mounted thereon.

In this way, the metal plate 13 is projected horizontally and movably up and down from the columnar projection 4 of the foundation 2, and its tip is connected to the opening 6 of the U-shaped metal body 6.
It is inserted into the interior from a.

In this way, a gap is created between the U-shaped metal body 6 and the metal plate 13 inserted into it, and an air spring 12 as shown in FIGS. 6 and 7 is arranged here as a pressing means. Set this air spring 1
2 presses the metal plate 13 against the metal body 6.

The air spring has metal plates 12b and 12c attached to the top and bottom of a single-layer or multi-layer main body 12a,
The lower metal plate 12b is bolted to the lower piece of the metal body 6, and the upper metal plate 12c is slidably coupled to the side surface of the metal body 6. Its mounting mechanism is
The coupling relationship between the cap groove 8 and the mounting member 7 can be utilized.

Further, the main body 12a of the air spring 12 is connected to the intake pipe 14.
a and an exhaust pipe 14b, a control valve 15 is installed in the middle thereof, and the end of the intake pipe 13 is connected to an air supply source 1 such as an air compressor or a cylinder.
I connected it to 7. Further, acceleration, velocity, and displacement sensors 16 are connected to the control valve 15 via a control device such as a microcomputer.

Note that the method for attaching the U-shaped metal body 6 and the metal body 13 to the columnar projections 3 and 4 so as to be movable up and down is not limited to the above method, and any method may be used as long as a free joining relationship that is not fixed is achieved. It is also possible to use universal joint hardware.

Further, a metal plate 13 is provided on the columnar protrusion 3 on the building 1 side, and a U-shaped metal body 6 is provided on the columnar protrusion 4 on the foundation 2 side.
You may also install it.

By the way, as an example of the present invention, as shown in FIGS. 1 and 7, a case was shown in which a three-layer air spring was used, but the air spring is not limited to three layers, but can be any number of layers. Although not shown, a hydraulic jack or an air jack may be used instead of the air spring as the pressing means, and this may be controlled by a hydraulic or pneumatic control circuit.

Next, the usage and operation will be explained. In this way, the building 1 and the foundation 2 are connected to the U-shaped metal body 6.
is connected to the metal body 6 via a metal plate 13.
sandwich the metal plate 13 with the pressing force of the air spring 12,
Since the metal plate 13 is pressed against the metal body 6, the building 1 is protected against minor vibrations such as wind and traffic vibration.
and the foundation 2 are rigidly connected to prevent the building 1 from shaking as much as possible.

By the way, the frictional force generated between the U-shaped metal body 6 and the metal plate 13 increases as the pressing force of the air spring 12 increases, and the pressing force of the air spring 12 increases as the internal pressure of the air spring increases. In the normal case where there is no air spring 12, the internal pressure of the air spring 12 is increased to strengthen the bonding force between the foundation 2 and the building 1.

On the other hand, when an earthquake occurs and the sensor 16 detects that the relative displacement applied to the building exceeds a certain level, the sensor 16 emits a signal and sends it to the control valve 15 via the control device. Upon receiving this signal, the control valve 15 opens the valve to remove air from the air vent 18 and release the air spring 12.
Slightly lower the internal pressure inside.

As a result, the bonding force between the U-shaped metal body 6 and the metal plate 13 weakens a little, allowing them to slide, and due to the relative displacement of the earthquake, the U-shaped metal body 6 and the metal plate 13 tend to separate against the pressing force. At that time, friction occurs.
This friction becomes a braking force and is consumed as thermal energy, and this consumed energy is used for building 1 and foundation 2.
Attenuates the relative displacement between the

In addition, regarding the vertical movement caused by traffic vibrations or earthquakes, the U-shaped metal body 6 and the metal plate 13 are attached to the columnar protrusions 3 and 4 so that they can move vertically, and can follow this movement, so no braking force is applied. It becomes something that does not exist.

As a result, even if displacement in the vertical direction occurs in addition to displacement in the horizontal direction, it will effectively act only on the horizontal displacement, and there is no possibility that this effect will be inhibited by the displacement in the vertical direction.

[Effect of idea]

As mentioned above, the building seismic isolation device of the present invention is
It separates large horizontal vibrations caused by earthquakes from small vibrations caused by other causes, and works effectively to attenuate the relative displacement of only the former, making it possible to take detailed measures.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the seismic isolation device of the present invention, Figure 2 is a plan view of the same as above, Figure 3 is an overall side view showing an example of its installation, and Figure 4 is a support rod and metal body. 5 is a perspective view of a joint between a metal body or metal plate and a columnar projection, FIG. 6 is a plan view of the air spring, and FIG. 7 is a front view thereof. 1...Building, 2...Foundation, 3...Protrusion of building, 4...Protrusion of foundation, 5...Rubber shoe, 6
... U-shaped metal body, 6a... Opening, 7... Mounting member, 8... Cap groove, 9... Support rod, 10... Horizontal mounting member, 11... Horizontal pocket groove, 12... Air spring,
13...Metal plate, 12a...Main body, 12b, 12
c...Metal plate, 14a...Intake pipe, 14b...Exhaust pipe, 15...Control valve, 16...Sensor, 17...Air supply source, 18...Air vent.

Claims (1)

[Scope of utility model registration request] The columnar protrusion on the building side and the columnar protrusion on the foundation side are placed opposite each other, and a U-shaped metal body with a sideways opening is provided on one columnar protrusion so as to protrude horizontally, and on the other columnar protrusion, A metal plate is attached so as to protrude horizontally, and the tip of the metal plate is inserted into the U-shaped metal body through the opening, and a pressing force such as an air spring or jack that can control the pressing force is applied inside the U-shaped metal body. A seismic isolation device for a building, characterized in that a means is interposed and the pressing means presses a U-shaped metal body and a metal plate.