US 12,404,154 B2
Work machine and mobile crane
Kohei Honjo, Aichi (JP); and Tatsuya Matsushita, Aichi (JP)
Assigned to SUMITOMO HEAVY INDUSTRIES CONSTRUCTION CRANES CO., LTD., Tokyo (JP)
Filed by SUMITOMO HEAVY INDUSTRIES CONSTRUCTION CRANES CO., LTD., Tokyo (JP)
Filed on Sep. 23, 2022, as Appl. No. 17/951,890.
Application 17/951,890 is a continuation of application No. PCT/JP2021/012987, filed on Mar. 26, 2021.
Claims priority of application No. 2020-057213 (JP), filed on Mar. 27, 2020.
Prior Publication US 2023/0018143 A1, Jan. 19, 2023
Int. Cl. B66C 23/74 (2006.01); B66C 13/00 (2006.01); B66C 23/88 (2006.01); B66C 23/36 (2006.01)
CPC B66C 23/74 (2013.01) [B66C 13/00 (2013.01); B66C 23/88 (2013.01); B66C 23/36 (2013.01); B66C 2700/0371 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A mobile crane that is assembled or disassembled at a work site, the mobile crane comprising:
a crane body; and
a counterweight that includes weights in a plurality of stages and that is attached to the crane body,
wherein a setting is capable of being changed to any one of a plurality of lifting capacities by changing the number of stages of the weights attached to the crane body,
the plurality of lifting capacities includes a first lifting capacity and a second lifting capacity that is a lower lifting capacity than the first lifting capacity,
the mobile crane further comprises a detection unit that monitors surroundings attached to the counterweight, and
the detection unit is attached to any one of the weights other than an uppermost stage of the weights attached when the second lifting capacity is set.