| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration control device that alleviates stress concentration to a rubber plate caused by action of compressive force to the vibration control device having a laminated structure of rigid plates and the rubber plate and that effectively prevents the occurrence of cracking in the rubber plate over a long period of time. SOLUTION: A recessed part 5 recessed in a curved shape is provided to the contour of the rubber plate 2 between the rigid plates on the side of either one of the rigid plates, and a projected part 6 is provided continued from the recessed part 5 and protruded outward in a curved shape. End portions on the rigid plate sides of the recessed part 5 and the projected part 6 are terminated by recessed curved lines 7, 8, respectively. An intersection angle (θ1) formed at the outside of the rubber plate by a virtual straight line A passing an intersection a with one horizontal line segment 10 and extending in contact with the projected part 6 is set within 100-120°, and a ratio (β/α) of a horizontal distanceβbetween an intersection c of the virtual straight line A with the other horizontal line segment 9, and an intersection d of a perpendicular line from the deepest position of the recessed part 5 to the other horizontal line segment 9, with respect to a distanceαbetween the two horizontal line segments 9, 10, is set to within 0.18-0.40. COPYRIGHT: (C)2011,JPO&INPIT |
