JPS6469842A - Vibration absorbing and vibration isolating device - Google Patents

Abstract

PURPOSE:To prevent a device easily damaged by vibration from earthquake vibration and environmental vibration, by a method wherein, by mounting a vibration isolating bed on a foundation bed, supported on rolling balls, through lamination rubber structures, vibration during earthquake is absorbed and fine vibration, e.g. environmen tal vibration, are enoughly absorbed. CONSTITUTION:Vibration of micron order, e.g. environmental vibration, is transmitted to a foundation bed 16 through rolling balls 12, 12... and support seats 14, 14.... Fine vibration in a horizontal direction and vertical direction generated to the foundation bed 16 is absorbed by means of lamination rubber structures 32, 32.... Thereby, fine vibration is not transmitted to a vibration isolating bed 34, and a device easily dam aged by vibration on the vibration isolating bed 34 is hardly influenced by fine vibra tion. When earthquake occurs, the rolling balls 12, 12... are rolled on a foundation bed floor 10, and vibration of the foundation bed 16 generated by earthquake is re placed with low frequency through the force of springs 20 and 20. The foundation bed 16 and the vibration isolating bed 34 are widely resonated approximately in an equal phase, slow and high swing is generated on the vibration isolating bed 34, and the vibration is gradually absorbed. Thus, the device easily damaged by vibration on the vibration isolating bed 34 is widely swung in a horizontal direction, but a fear of the device falling down is eliminated.