| 摘要 |
This disclosure relates to a novel knockdown ladder particularly adapted for use with a different number of rungs depending upon the particular height to which a person desires to climb comprising a pair of side rails carrying plates inboard thereof with upwardly opening U-shaped notches with the plates and side rails also defining an upwardly opening slot, a plurality of ladder rungs, a plate secured to each ladder rung at opposite ends thereof, and the rung and rung plates being contoured to the general shape of the notches and slots respectively whereby downward movement of each ladder rung relative to the side rails and transversely opposite side rail plates results in the reception of the rung plates into the associated slots and the reception of the ladder rung into the associated notches.
|
