JPH1026179A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve living comfortability and safety by damping vibration of a building, or the like due to an earthquake, wind, or the like by replacing horizontal vibration kinetic energy of a structure to a form of rotational operating energy by converting it to rotational energy of a flywheel. SOLUTION: A bidirectional rotational damping mechanism is provided in parallel with laminated rubber, etc., as a base isolation device between a structure and the ground. It is constituted by combining an X directional rotational damping mechanism 11 and a Y directional rotational damping mechanism 12 and individually converts rectilinear motion on both of XY directional flat surfaces to rotation of a flywheel. Accordingly, a rack 5 is manufactured in a mechanism to give torque to rotating gears 6, 7, and torque in the reverse rotational direction is constituted to slide. Consequently, transmission gears 8, 9 transmit torque only in the same direction by reciprocal motion of the rack 5, and the flywheel is rotated only in one direction. Additionally, even when the rack 5 stops, the flywheel 4 keeps rotating, discharging accumulated rotational kinetic energy little by little by the amount of friction of a bearing and absorbs vibration of the structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application field] The present invention is useful for attenuating coupled vibrations caused by earthquakes, winds, and the like in buildings and the like that use laminated rubber for vibration isolation to enhance livability and safety.

[0002]

[Prior art] Vibration isolation devices, such as laminated rubber, have been used in combination with various types of dampers. Examples include damping material dampers using oil dampers and lead rod dampers, and torsion bar damping. All of them convert energy into heat and release energy.
None of these are efficient at converting kinetic energy.

[0003]

[Problems to be Solved by the Invention] The above-mentioned existing damping method has poor energy conversion efficiency, and due to its adverse effects, the structure shakes forever and long. In addition, attenuated materials have aged and require long-term operation and maintenance costs.

[0004]

[Means for Solving the Problems] In order to increase the energy conversion efficiency, the relative linear motion between the ground and the structure is directly converted into the rotary motion of the flywheel via the gear mechanism. In order to convert the movement of the relative linear reciprocating movement between the ground and the structure in the opposite direction of the return and return to one-way rotation of the flywheel,
The problem is solved by providing a one-way gear mechanism. The flywheel continues to rotate even if the relative linear movement between the ground and the structure is stopped by the two sets of one-way gear mechanism.

[0005]

[Action]

As shown in [Fig. 1], the structure 3 generates deformation corresponding to the spring constant of the laminated rubber 2 etc. due to an external force such as an earthquake or wind.

As shown in Fig. 2, the combination of the X-direction rotary damping mechanism 11 and the Y-direction rotary damping mechanism 12 causes the linear motion on the plane in both XY directions to individually rotate the flywheel. The rack 5 applies a rotating force to the rotating gears 6 and 7. Gears 6 and 7 are made with a mechanism that can apply torque only in one direction in the same rotation direction. Gears 6 and 7 will slip in the reverse rotation direction. As a result, the transmission gears 8 and 9 transmit the torque only by the reciprocating motion of the rack 5, and as a result, the flywheel rotates only in one direction. The flywheel continues to rotate even if the rack 5 stops. The rotating kinetic energy of the flywheel that has been stored slowly over time,
Release the friction of the bearing little by little.

[0006]

Embodiment An embodiment according to the present invention will be described with reference to FIG. When the laminated rubber 2 and the rotary damping mechanism 1 are arranged below the building, the spring constant between the ground and the building 3 is determined by the laminated rubber, and the damping constant is determined by the rotary damping mechanism. Each constant is designed to be the optimum value according to the inertial mass of the building, and vibration isolation by external force can be set optimally.

[0007]

[Effects of the Invention] When a large force such as an earthquake is applied to a structure, it has an effect of reducing the impact and damping the vibration quickly. Also, when a periodic small force such as wind is applied to a structure, it has the effect of sufficiently attenuating the fluctuation at the natural frequency of the structure.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a front sectional view of the damping device of the present invention.

FIG. 3 is a side sectional view of the damping device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 XY two-way rotary damping mechanism 2 Vibration isolation device of laminated rubber etc. 3 Structure (building etc.) 4 Handwheel 5 Rack (linear gear) 6 One-way rotary gear 7 One-way rotary gear 8 Transmission gear 9 Transmission gear 10 Transmission gear 11 X direction rotary damping mechanism 12 Y direction rotary damping mechanism

Claims (1)

[Claims] [1] If the structure supported by the vibration-isolation support mechanism consisting only of the laminated rubber 2, the roller bearings 2, etc. is used as it is, it will shake greatly in a long cycle due to the force of the earthquake or wind. In order to attenuate the shaking, the horizontal shaking kinetic energy of the structure is converted to the rotational energy of the flywheel, and the energy is replaced with harmless rotating kinetic energy to reduce the shaking of the structure. Vibration isolation support mechanisms such as the laminated rubber 2 and the roller bearing 2, and the relative movement of the horizontal plane between the foundation and the structure in the X and Y 2 directions are converted into the rotational movement of the flywheel of the rotation damping device 1 to convert the kinetic energy of the structure. An anti-vibration device consisting of a damping device that can be released.