| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a pushing force of a one-motion grommet which is engaged with a through hole of a vehicle body panel with a pushing process in one direction. SOLUTION: An enlarged-diameter cylinder is provided between a first small- diameter cylinder and a second small-diameter cylinder provided in both sides in the longitudinal direction. The enlarged-diameter cylinder is formed by extending a lightening hole from the rear end surface of the enlarged-diameter cylinder in the side being continuous to the second small-diameter cylinder, in the shape continued to a large-diameter portion from a conic portion in the axial direction in order to branch the large-diameter cylinder to an external cylinder and an internal cylinder continued to the second small-diameter cylinder. An inclining wall and a vertical wall are projected opposed with each other at the external circumferential surface of the external cylinder. An opening side of the lightening hole located at the internal side of the vertical wall is inclined, so that the opening end side of the external circumferential surface is widened and a rib is projected keeping an interval between this inclining surface and the external circumferential surface of the internal cylinder provided opposed to the inclining surface.</p> |
