VIBRATION DAMPING DEVICE

摘要

PROBLEM TO BE SOLVED: To enable the generation of a given damping force through high- efficient shearing deformation in a horizontal direction of a columnar elastic plastic substance by an inputted vibration source and besides prevent the occurrence of centralization of a stress to loading of a vertical load. SOLUTION: A vibration damping device comprises a lamination rubber body 10 where a rubber layer 13 is lamination-molded between a first upper steel plate 11 and a lower steel plate 12 and a hollow rubber body 10a is formed at a central part; and a columnar lead plug 20 disposed in the hollow part 10a of the lamination rubber body 10. The lead plug 20 is charged in the hollow part 10a of the lamination rubber body 10 in a state to be surrounded by a lamination rubber auxiliary body 30 formed that rubber layers 33 and intermediate steel sheets 34 are alternately lamination-molded between a second upper steel plate 31 and a second lower steel plate 32. The rubber layer 33 of the lamination rubber auxiliary body 30 is formed in thickness thick enough to be hardly cut into even through repeated plastic deformation of the lead plug 20.