Telescopic jib for vehicular cranes

摘要

A telescopic jib includes a base part, and at least one telescopic part telescoped in the base part. A shift mechanism extends and retracts each telescopic part. The base part and each telescopic part includes an upper semi-box shaped section part, and at least one of the base part and the telescopic part includes a lower section part having shell segments adjoining each other. Each shell segment has an outwardly curved shape.