| 摘要 |
An alignment device (1) on a crane boom (2) having telescopic boom sections (5, 14a, 14) and a side stowable boom extension (3) swingable from a stowed position to a working position and connectable to a nose assembly (4) on a boom section (5) by upper and lower clevis connections (6, 7, 8, 9, 3b) on each side of the nose assembly (4). The alignment device (1) includes an abutment assembly (12) mounted on the nose assembly boom section (5), and another abutment assembly (13) mounted on another boom section (14). The abutment assemblies (12, 13) engage each other during relative retracting movement of the boom sections (5, 14) and forcibly engage the end (3b) of the boom extension (3) to align the apertures (3c, 9b) of the clevis connection and nose assembly to facilitate the insertion of the pin (11) therein. <IMAGE> |
