| 摘要 |
PROBLEM TO BE SOLVED: To provide packing smoothly inserting a tube spigot into a tube socket and used for obtaining a tube coupling excellent in watertightness in rubber packing used for the tube coupling free in the extension-contraction and an angle. SOLUTION: In this rubber packing composed of an annular packing body 1 and a lip part 2 inclined in the shaft center direction by being folded back from an inner peripheral one end part of the packing body, the rubber packing is characterized in that the outer periphery of the packing body forms a shape of a trough part 11 in the width directional center, both sides form crest-shaped shoulder parts 12 and 13, and an outer diameter of the shoulder part 12 positioned on the tip side of the lip part is set in a dimension larger than an outer diameter of the shoulder part 13 positioned on the folding-back side of the lip part. |
