JPS61165044A - Vibration, earthquake isolator - Google Patents

Abstract

PURPOSE:To isolate horizontal vibration as well as perpendicular vibration only when required by inserting electromagnets having magnetic force controllable with correspondence to the output of sensor into rubber vibration isolator in several layers. CONSTITUTION:Planar electromagnets 3 are inserted horizontally in several layers with proper interval into a rubber vibration isolator 1 having pressure receiving boards 2 at the upper and lower ends. A controller 4 for controlling the strength of magnetic force is connected to the electromagnet 3 and a sensor 5 to modify the control mode of the electromagnet 3 with correspondence to the output from the sensor 5. Load gauge, displacement gauge, accelerograph, speed meter, etc. for measuring the vibration characteristic of the disturbance in building are included in the sensor 5 which can be employed in combination.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to vibration isolation and seismic isolation devices for buildings.

[Conventional technology and its problems]

Anti-vibration rubber made of synthetic rubber in the form of blocks or columns is well known. Although such anti-vibration rubber has a spring constant that effectively acts against vertical vibrations and is extremely effective, it has a weak restoring force and cannot exhibit the expected effect against horizontal vibrations caused by earthquakes, etc. There are many.

On the other hand, for structures that are affected by wind, such as outdoor buildings, the rigidity should be increased to eliminate horizontal vibrations as much as possible during normal times, and the rigidity should be lowered only in emergencies such as earthquakes. Although it is desirable to attenuate the vibration, such fine-grained support has not been possible with conventional anti-vibration rubber.

The purpose of the present invention is to eliminate the disadvantages of the conventional example, and to provide a vibration isolation and seismic isolation device that exhibits a vibration damping effect only when necessary, and that can sufficiently cope with not only vertical vibration but also horizontal photography. It is about providing.

[Means for solving problems]

In order to achieve the above object, the present invention inserts flat electromagnets in several layers into a rubber body for vibration isolation, and equips the electromagnets with a controller that controls the strength of the magnetic force according to the output of the sensor. The gist is that the connection was made.

[Effect]

According to the present invention, the rubber acts against vertical vibrations and exerts a vibration-proofing effect, and the horizontal restoring force of the magnet acts against horizontal vibrations, maintaining the stability of the building at all times and providing a vibration-proofing effect. demonstrate. Furthermore, this horizontal restoring force is made more versatile by weakening the magnetic force and reducing the rigidity of the device only in the event of an abnormality such as an earthquake, thereby obtaining a vibration isolation effect and a vibration damping effect.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a longitudinal sectional front view showing one embodiment of the vibration damping and seismic isolation device of the present invention, and in the figure, 1 indicates a rubber body for vibration isolation provided with receiving pressure Fi2 at both upper and lower ends. The horizontal cross-sectional shape of the rubber body 1 may be circular or square.

A flat electromagnet 3 was inserted into the rubber body 1 horizontally and divided into several layers at appropriate intervals.

The shape of the electromagnet 3 may be circular or square, and may also be open in the center or ring-shaped.

A controller 4 that controls the strength of the magnetic force is connected to the electromagnet 3, and the controller 4 is further connected to a sensor 5, and when it receives a measurement output from the sensor 5, it controls the electromagnet 3 according to the content. The control contents can now be changed.

In addition, as the sensor 5, a load meter, a displacement meter, an accelerometer,
It captures the vibration characteristics of disturbances in buildings such as speedometers, and it is conceivable to use some of these in combination as appropriate.

Next, how to use it will be explained. As mentioned above, the device of the present invention is used as the foundation of an outdoor building, and the rubber body 1 contributes to vertical vibrations such as traffic vibrations. The function is the same as that of conventional anti-vibration rubber, and the natural frequency of the building is changed by the spring constant of the rubber body 1 to avoid resonance with the vertical vibration of the ground.

On the other hand, in a normal case without an earthquake, the magnetic force of the electromagnet 3 is strengthened by the controller 4, and the rigidity of the device is set to a value determined in advance by analysis to prevent shaking due to wind, small earthquakes, etc.

On the other hand, during an earthquake, the controller 4 controls the electromagnet 3.
weaken the magnetic force of the device and reduce the rigidity of the device.

In this way, when the rubber body 1 deforms as shown in FIG. 2 due to horizontal vibration caused by an earthquake, and the electromagnets 3 try to separate from each other, the displacement is attenuated by the restoring force of the magnetic force. FIG. 3 shows this situation, where the solid line shows the case where there is no magnetic force due to the electromagnet 3, and the dotted line shows the case with the device of the present invention.

The controller 4 makes all determinations of normal times or earthquakes based on the measurement output from the sensor 5.

〔Effect of the invention〕

As described above, the vibration isolation and seismic isolation device of the present invention can not only deal with vertical vibrations when used for outdoor building foundations, but also act extremely effectively against horizontal vibrations caused by earthquakes etc. due to the action of magnetic force. Furthermore, it is possible to use the device in a more detailed manner, such as by strengthening the magnetic force under normal conditions to increase the flexibility of the device and reduce shaking caused by wind or the like.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the vibration isolation and seismic isolation device of the present invention, FIG. 2 is a perspective view showing the state during an earthquake, and FIG. 3 is a graph showing the action during the earthquake. 1...Rubber body 2...Pressure plate 3...Electromagnet 4...Controller 5...Sensor Figure 1 Figure 2

Claims (1)

[Claims] A vibration-proofing device characterized in that a flat electromagnet is inserted in several layers into a rubber body for vibration-proofing, and a controller is connected to the electromagnet to control the strength of the magnetic force according to the output of a sensor. Seismic isolation device.