| 摘要 |
PROBLEM TO BE SOLVED: To always exert a large vibration control effect regardless of a loading state of a cargo.SOLUTION: A vibration control device 10 provided on a rack 2 comprises: a first attenuating device 20 set so that it can cope with small vibration; and a second attenuating device 50 set so that it can cope with large vibration in combination with the first attenuating device 20. The first attenuating device 20 comprises a movable mass 21, a period adjusting spring 22, and a first damper 23, and its attenuating performance is set for small vibration. The movable mass 22 has a 4% to 10% mass of an entire mass of a vibration control object. The second attenuating device 50 comprises a second damper 52, and is arranged outside the movable mass 21 at a clearance between it and the movable mass 21. The second damper 52 provides attenuating force in combination with the first damper 23 when the movable mass 21 moves beyond the clearance. |
