| 摘要 |
PROBLEM TO BE SOLVED: To secure sufficient sealing performance even if a rubber ring with a large elasticity of 75° or lower of hardness is used, and to improve durability (maintenance performance) and reliability by enabling the selection of a material with more excellent chemical resistance. SOLUTION: As an elastic ring 7, the rubber ring 7r with 75° or lower of hardness is used. The length Lw in the width direction of a parallel piece 6a... is selected so that a clearance C between a wall face 4w of a seal groove 4 opposing a tip edge 6as... of each of the pair of parallel pieces 6a... in a jacket 6 is larger than a predetermined size Lc when a first member 2 and a second member 3 are installed. Selection is performed so that a distance between a ring projection 8aa... nearest to the tip edge 6as... out of the plurality of ring projections 8aa, 8ab... formed on the surface of the parallel pieces 6a... and the tip edge 6as... is not longer than a predetermined length Lr. COPYRIGHT: (C)2010,JPO&INPIT |
