| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact bearing device which is excellent in bearing characteristics of load in vertical and horizontal directions and which follows rotation in a vertical plane to sufficiently absorb vibration.SOLUTION: A bearing device 1 comprises a plurality of protrusions 8 and a plurality of recesses 9 on an upper shoe fixed to a bridge girder, each of the protrusions 8 and recesses 9 having a substantially trapezoidal cross section. On a lower shoe 3 fixed to the bridge girder, a plurality of protrusions 11 and a plurality of recesses 12 are provided, each of the protrusions 11 and recesses 12 having a substantially trapezoidal cross section and engaging with each of the protrusions 8 and recesses 9 of the upper shoe 2. The protrusions 8 and recesses 9 of the upper shoe 2 extend substantially linearly in a bridge axial direction, and the side faces thereof are inclined planes 8a. The protrusions 11 and recesses 12 of the lower shoe 3 also extend substantially linearly in a bridge axial direction, and the side faces thereof are inclined planes 11a. A rubber layer 4 is provided between each of the inclined planes of the upper shoe 2 and each of the inclined planes of the lower shoe 3 facing each other to bear horizontal and vertical loads. The protrusions and recesses engaging with each other are extended in a bridge axial direction to follow rotary motion caused by swinging in a vertical plane of the bridge girder. |
