TELESCOPIC BOOM MOUNTING STRUCTURE

摘要

A telescopic boom mounting structure is provided which can use an existing shaft member even if the width of the main body of the boom base is increased. This telescopic boom mounting structure mounts a boom base (210) by a bracket (300) so as to enable rising and lowering, wherein the bracket (300) is provided with a pair of contact plates (310) which are bonded to both lateral walls of the base boom (210) and are held between a pair of opposite holding units on a swivel post, and each contact plate (310) comprises a shaft portion (314) which is attached to a holding unit so as to allow rising and falling; a predetermined region (315) that includes the shaft portion (314) is configured on each of base pieces (312), and width of the bracket (300) outside of said predetermined region (315) is set to be greater than the width of the bracket (300) in the predetermined region (315).