JPH033725Y2 - - 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.
Furthermore, in the case of using a jack or the like, a large and complicated control device is required, resulting in high cost.

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 simple structure seismic isolation device which can be displaced only in response to a strong shock caused by an earthquake and which acts effectively to attenuate the shock.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a U-shaped metal body with two upper and lower plates connected at their bases in a tightenable manner on either the building or the foundation; A metal plate is provided, the tip of this metal plate is inserted between two upper and lower metal plates, and a tightening means using a bolt or a spring is provided on the metal body, and the upper and lower two plates are held together while sandwiching the metal plate. The gist is that by tightening, the metal plate is movably clamped to the metal body while creating friction.

[Effect]

According to the present invention, the metal plate is sandwiched between two upper and lower plates of the metal body by the tightening force of the tightening means, so that weak vibrations such as wind and traffic vibrations can be prevented. On the other hand, when a large displacement occurs due to an earthquake, the metal plate moves while creating friction within the metal body to which it is sandwiched, and at that time, the frictional force becomes thermal energy and is consumed. , due to this consumed 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 side view showing one embodiment of the seismic isolation device of the present invention, and Fig. 2 is a side view of the entire installed state of the same.
In the figure, 1 indicates a building, and 2 indicates a foundation that supports this building 1.

The foundation 2 and the building 1 are not rigidly connected and are movable, and one example of this is to interpose between them a shoe 3 made of laminated rubber with a steel plate interposed in a rubber column. Sometimes.

A U-shaped metal body 4 is installed horizontally on the columnar protrusion 1a on the side of the building 1, which is made up of two upper and lower plates that are tightenably connected at the base. can be followed. That is, as shown in FIG. 1, the mounting member 6 of the metal body 4 is made to be able to slide in the vertical blind groove 5 of the columnar projection 1a, and as shown in FIG. A mounting member 6' provided at the other end of the support rod 7 attached above the protrusion 1a is slidably inserted into a groove 8 formed horizontally on the upper surface of the metal body 4, and the support rod 7 is attached to the metal body. The body 4 is lifted and supported.

A tightening means 10 using a bolt or a spring is disposed between the upper and lower two plates of the metal body 4, and this tightening means 10
This tightens the space between the plates.

On the other hand, as shown in FIG. 5, a vertical blind groove 5 is also formed in the columnar projection 2a on the side of the foundation 2, into which a mounting member 6'' is slidably inserted, and a metal plate 9 is horizontally inserted into the groove. Attach to.

In this way, the metal plate 9 is projected horizontally and movably up and down from the columnar projection of the foundation 2, and its tip is inserted into the interior through the opening of the metal body 4. is clamped between the two upper and lower plates of the metal body 4 by the clamping means 10, thereby being movably clamped while generating friction.

Incidentally, the frictional force caused by this clamping can be changed by adjusting the tightening means 10 made of bolts or springs and changing the tightening force.

Further, the method of attaching the metal body 4 and the metal plate 9 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 bonding relationship that is not fixed is achieved. It is also possible to use universal joint hardware.

Furthermore, the metal plate 9 may be provided on the building 1 side, and the metal body 4 may be attached on the foundation 2 side.

Next, the usage and operation will be explained. In this way, the building 1 and the foundation 2 are connected via the metal body 4 and the metal plate 9, and the metal body 4 is connected to the upper and lower parts.
Since the metal plate 9 is fastened by the fastening force of the fastening means 10, the building 1 and the foundation 2 are rigidly connected to each other in order to prevent the building 1 from shaking as much as possible against minor vibrations such as wind and traffic vibrations. consideration will be given to

On the other hand, when an earthquake occurs, a force that causes a large relative displacement is applied in the horizontal direction, and the metal body 4 and the metal plate 9 try to separate from each other against the tightening force.
At that time, friction occurs.

This friction becomes a braking force and is consumed as thermal energy, thereby damping the relative displacement between the building 1 and the foundation 2.

The graph in Figure 6 shows this state; the waves drawn by the solid line indicate the vibration in the absence of the frictional force, and the waves drawn by the dotted line indicate how the vibration is attenuated as the frictional force turns into heat. There is.

In addition, regarding vertical movement caused by traffic vibrations or earthquakes, the metal body 4 and metal plate 9
Since it is attached to A so that it can move up and down, and can follow it, no braking force is applied.

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 effectively works to attenuate the relative displacement of only the former. Furthermore, since the device itself is relatively simple and simple, it can be realized at low cost.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the seismic isolation device of the present invention, Fig. 2 is an overall side view showing an example of its installation,
Fig. 3 is a view taken along the line A-A in Fig. 1, Fig. 4 is a perspective view of the joint between the support rod and the metal body, and Fig. 5 is a perspective view of the joint between the metal plate and the columnar protrusion. , FIG. 6 is a graph showing the operation of the device of the present invention. 1...Building, 1a, 2a...Column-like protrusion, 2...
...Foundation, 3...Rubber shoes, 4...Metal body, 5...
...Vertical bag groove, 6, 6', 6''...Mounting member, 7...
Support rod, 8...Fall groove, 9...Metal plate, 10...Tightening means.

Claims (1)

[Scope of utility model registration request] A U-shaped metal body consisting of two upper and lower plates connected at their bases so that they can be tightened is provided on either the building or the foundation, and a metal plate is provided on the other of the building or the foundation.
By inserting the tip of this metal plate between the upper and lower two plates of the metal body, providing a tightening means using a bolt or a spring on the metal body, and tightening the two upper and lower plates together while sandwiching the metal plate, the metal A seismic isolation device for a building characterized by a plate movably attached to a metal body while generating friction.