CONTROLLER FOR TELESCOPIC MECHANISM

摘要

PROBLEM TO BE SOLVED: To provide a controller for a telescopic mechanism that can automatically telescopically drive a single-cylindered telescopic mechanism even in a telescopic pattern used in a maintenance operation thereof. SOLUTION: A controller 65 stores a plurality of telescopic patterns as a normal telescopic mode comprising a boom length and each stage boom extension ratio used in a normal operation of a telescopic boom, and a plurality of telescopic patterns as a maintenance telescopic mode comprising a boom length and each stage boom extension ratio used in a maintenance operation of the telescopic boom. A telescopic mechanism operating means 60 selects the normal telescopic mode or the maintenance telescopic mode and selects a target telescopic pattern in the selected telescopic mode, so that the telescopic mechanism 140 is automatically telescopically driven in the telescopic pattern.