| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal structure capable of reducing the number of components, attachment time of each seal member to a seal groove, and man-hours for attachment.SOLUTION: A seal structure provided in a sliding clearance between a cylinder 1 and a rod 2 in a hydraulic-pneumatic apparatus and partitioning a high pressure side from a low pressure side includes a seal groove 20A annularly provided along a peripheral direction of an outer peripheral surface of the rod 2, and a seal member 20 stored in an inside of the seal groove 20A and closing the sliding clearance between the cylinder 1 and the rod 2. The seal member 20 includes a sliding ring 230 abutted to the outer peripheral surface of the rod 2, and a backup ring 220 arranged in a low pressure side with respect to the sliding ring 230, and the sliding ring 230 has a first ring region 231a positioned in a higher pressure side than the backup ring 220 and extended in a radial direction, and a second ring region 231b extended to a direction orthogonal to the first ring region 231a and positioned in the radial outer side of the backup ring 220 when viewed in a radial direction. |
