| 摘要 |
<p>The tackle is for handling prefab concrete components with the aid of ropes, chains etc., having a headed anchor bolt concreted into the component, and with which a spherical piece with a lifting eye engages. The piece has a slot in which the bolt shank is accommodated, ending in an opening through which the bolt head is inserted, and running through roughly 180 deg. There is a spring-loaded locking bolt mounted near the opening, and released by a rope pull-pulling on a lever. The lever (15) is angular, its actuating arm (18) pivoting on the eye portion (7), while its control arm (19), when the locking bolt (12) is in the engaged position, is parallel to the eye portion. There is a connecting rod (20) between actuating arm and locking bolt, coupled to both by pivot pins (21, 22).</p> |
