| 主权项 |
1. A lid-fastening structure comprising:
an undercover having an adjustment opening; a lid for closing the adjustment opening of the undercover; and a bolt rotatably held in the lid, wherein the lid includes:
an insertion hole formed to allow insertion of the bolt;a backslide-limiting opening formed by cutting out a portion of a circumferential edge of the insertion hole in such a way as to allow the bolt to slide, the backslide-limiting opening being continuous with the circumferential edge of the insertion hole and configured to limit returning of the bolt to the insertion hole;a supporting/fastening hole formed continuous with the backslide-limiting opening to a radius smaller than a radius of the insertion hole, the supporting/fastening hole having a circumferential edge partially cut out to allow the bolt to enter the supporting/fastening hole; anda retainer part formed between an external thread and a bearing surface of the bolt for preventing the bolt from dropping off, wherein the lid further includes one end portion releasably connectable to the undercover and an opposite end portion including a T-shaped engagement hook engaged with and held on the undercover, wherein the undercover has a stepped section configured to extend along an edge of the adjustment opening for engagement with the engagement hook, wherein the stepped section has a wall formed to extend upright from an inner surface of the undercover, and a step formed continuously with an upper end of the wall and extending parallel to the inner surface of the undercover, wherein the stepped section is receptive of a part of the lid when the lid is closed, wherein the wall of the stepped section is configured to extend along an edge of the opposite end portion of the lid, wherein the undercover has a T-shaped assembly hole of a T-shaped configuration formed to penetrate the stepped section and configured to allow passage of the T-shaped engagement hook of the lid, the T-shaped assembly hole including an insertion hole formed in the step and extending in a direction along the wall of the stepped section, the insertion hole being configured to allow insertion of the engagement hook from below, a slide hole extending te-perpendicularly from the insertion hole vertically across the wall and having a width smaller than a width of the insertion hole, and a suspension hole continuous with the slide hole and formed in the inner surface of the undercover, whereby the T-shaped engagement hook of the lid inserted in the insertion hole is displaceable through the slide hole to the suspension hole where the engagement hook is hooked on the wall of the stepped section, and wherein when the lid is closed, the T-shaped engagement hook lies flat on the inner surface of the undercover, and when the lid is opened, the T-shaped engagement hook is hooked on the wall of the stepped section to thereby allow the lid to hang down from the undercover without detachment from the undercover. |
