[Problem] To provide a lightweight and high-rigidity telescopic boom in which strain during manufacturing is suppressed.[Solution] In a telescopic boom 13, a plurality of booms forms a telescope structure, and the telescopic boom 13 includes a boom fixing mechanism 15 that fixes a top boom 21 disposed relatively inside at a predetermined position with respect to a first intermediate boom 22 disposed relatively outside. The boom fixing mechanism 15 includes a boom fixing pin 26 that is provided to the top boom 21 and advances and retreats with respect to the first intermediate boom 22, a fixing boss 32 that is provided to the first intermediate boom 22 and into which the boom fixing pin 26 is inserted and extracted, and a gap maintaining member 90 that is provided to the fixing boss 32 and protrudes outward to maintain a gap between the first intermediate boom 22 and a second intermediate boom 23 disposed further outside.
TELESCOPIC BOOM
TELESKOPAUSLEGER
FLÈCHE TÉLESCOPIQUE
2024-05-29
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |