| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal device for an oil filler port which prevents reversing to display excellent durability while ensuring a follow-up character in a lip part of a seal packing. SOLUTION: When an oil filler gun 10 is drawn out, a tip end side 2a1 of a lip part 2a has high rigidity with deformation difficult, so that a root 2a2 of the lip part 2a tends to generate deformation of deflection so as to maintain a contact position relating to the external periphery of a nozzle part. Here, by supporting the lip part 2a with a protruded part 4b1 of an engaging part 4b of a plate 4 abutting to a step difference wall surface 2c in the internal periphery of the lip part 2a, its root 2a2 is reinforced, the root 2a2 of this lip part 2a is prevented from deformation of deflection.
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