| 摘要 |
<p>A mechanism of the hold-down type is provided which permits a predetermined load to be applied to a unit, e.g. an avionics box, secured upon a structure, while also permitting insertion and extraction of that unit through operation of the mechanism. The mechanism is particularly adapted for use in relatively confined areas. It includes a hook (70) which is mounted to the unit itself, and a housing (20) which is constructed for releaseable engagement with the hook (70) and which houses a clutching mechanism (28,30,38,42,43,45). A drive shaft portion (3l) extends from one end only of the housing (20) and is retained by a hinge-type mounting which includes a bracket member (50) secured to the structure supporting the unit, and a nut element (5l). The nut element (5l) and bracket member (50) are constructed so as to limit both the downward and upward pivotal movement of the housing (20) and the drive shaft (30).</p> |
