| 摘要 |
PROBLEM TO BE SOLVED: To improve rigidity of an outer peripheral edge part of a sheet wall by embossing and molding a ring projected part projected to the upper surface side on the outer peripheral edge part of the sheet wall of a bump stopper with which a bumper rubber installed on a piston rod makes contact at the time when the piston rod of a hydraulic pressure dumper is displaced to the maximum in the contracting direction. SOLUTION: An outer cylinder of a hydraulic pressure bumper is furnished with a rod guide 19 to guide sliding of a piston rod 7 on an upper end part and an oil seal 20 to close a sliding clearance of the piston rod 7 fitted and installed on it, and an upper end surface of the outer cylinder is covered with a bump stopper 21 with which a lower end of a bumper rubber 15 makes contact at the time when the piston rod 7 is moved and contracted to the maximum. This bump stopper 21 is formed of a circular sheet wall 23 with an upper surface of which the bumper rubber 15 makes contact and a cylindrical wall 24 extending in the roughly orthogonal direction from its outer periphery, but in this case, rigidity of the sheet wall 23 is improved by embossing and molding a ring projected part 25 on an inner and outer peripheral edge part of the sheet wall 23 so as to project it to the upper surface side. |
