APPARATUS FOR COVERING AN OPENING DEFINED IN A STRUCTURE

摘要

A cover (10) including a generally L-shaped end plate (20) for stretching and fastening the cover (10) to a frame structure (30). End plate (20) is lockable into a fixed, stretching position with respect to the frame structure (30). Different locking arrangements for accomplishing this are disclosed. Structure (160) is provided for mounting the frame structure (30) to the box of a pickup truck or an equivalent apparatus. Structure is also provided for preventing the cover (10) from ballooning during use.