Telescopic jib for vehicular cranes

摘要

A telescopic jib (22) includes a base part (8), and at least one telescopic part (1) telescoped in the base part (8). A shift mechanism (28) extends and retracts each telescopic part (1). The base part (8) and each telescopic part (1) includes an upper semi-box shaped section part (2), and at least one of the base part (8) and the telescopic part (1) includes a lower section part (3) having shell segments (4, 5, 6, and 7) adjoining each other. Each shell segment (4, 5, 6, and 7) has an outwardly curved shape. <IMAGE>