Patent ID: 9534352
Date: 2017-01-03
CPC Classifications: E02F

Claim:
1. A boom for a working machine, the boom comprising: a forked base support of which a base end side is pivotally supported by a machine body and a fore end side is connected with a boom main body, the base support comprises: the body part includes: the upper wall of the body part includes: on the first side of the upper wall of the body part, an enlarged opening part that extends in an upward direction away from the lower wall from the fore end side toward a forked side is formed, and on the second side of the upper wall of the body part, a swelling part that extends in the upward direction away from the lower wall from the fore end side toward the forked side so as to correspond to the first side of the upper wall, and skirt parts that separate in a forked shape and extend downward from a lateral center of a top part of the swelling part toward upper surfaces of the left and right leg parts are formed.