| 摘要 |
<p>PURPOSE: To ensure easy movement from a temporary lock position to a release position by forming a temporary lock means with a free end of a hook called a 'temporary lock portion', engaging the portion in proximity to a cutout behind a projection and arranging it in line with the projection. CONSTITUTION: The extension 4 of a clamper consists of a first portion 7a, located close to an ear 2 and having a lateral dimension almost equal to that of the ear 2 and a second portion 7b having a projection 4a at the free end thereof. The lateral dimension is almost equal to 1s of the projection 4a and smaller than the width of the first portion 7a. This arrangement facilitates passage of the projection 4a through a cutout 5. The first portion 7a has a swelling 9, and the second portion 7b has a length greater than the thickness (e) of the free end of a hook 3. Easy movement between a temporary lock position is facilitated and a release position is thus ensured and the hook 3 is automatically engaged with a temporary lock portion if the ear 2 is unlocked because of incomplete engagement.</p> |
