| 摘要 |
PURPOSE:To efficiently attenuate the residual vibration and suppress the max. shift in the application of an impact to the min. by adjusting the rigtity in the horizontal direction of a vibrantionproof supporting device with high rigidity. CONSTITUTION:The regidity in the horizontal direction is adjusted by turning only the first shaft 11 and adjusting the length of the exposed part of the second shaft 12. If each of the external thread part 13 and the internal thread part 14 of the shaft 11 has an equal pitch, the level of a machine body 15 does not vary even if the shaft 11 is revolved. In the installation of the machine body 15, the distance from the bottom surface 15' of the body 15 to a floor surface, i.e., to the bottom surface 20' of a shell body 20 is not necessarily constant according to the conditions such as floor surface. Even in this case, in this vibrantionproof supporting device, the length of the exposed part of a shaft 17 can be kept constant. In other words, the value of the rigidity w in the horizontal direction (characteristic frequency of a model having a degree of freedom of -) T (time width in the action of impact force)/pi of the supporting device can be kept at a constant value in even number, and the residual vibration can be suppressed. |
