Stacker crane

A stacker crane, comprising:

• a lower frame having:
• front and rear end portions;
• and
• running wheels operable to run freely along at least one rail, the running wheels disposed at both of the front and rear end portions;
• front and rear support rods standing respectively from the front and rear end portions of the lower frame, the front and rear support rods each having an upper end portion, a horizontal top end, and a side surface;
• an upper frame connected to the upper end portions of the front and rear support rods;
• a platform guided by the front and rear support rods and operable to be freely lifted up and down, the platform, the lower frame, the front and rear support rods, and the upper frame together defining:
• a crane rear direction;
• a crane front direction;
• a crane vertical direction;
• a crane downward direction;
• and
• a crane width direction;
• and
• the upper frame comprising:
• a main part formed by a first plate extending in the crane vertical direction and comprising:
• front and rear extensions extending respectively in the front crane and rear crane directions, the front and rear extensions each having extension ends;
• and
• front and rear mast connecting portions extending in the crane downward direction respectively from the extension ends of the front and rear extensions, the front and rear mast connecting portions being connected respectively to the front and rear support rods by bolts and being urged against the respective side surfaces of the front and rear support rods;
• a reinforcing part formed by a second plate extending horizontally in the crane width direction and extending in the front and rear crane directions;
• a pair of left and right frame portions comprising the main part and the reinforcing part of the upper frame;
• the pair of left and right frame portions are directly connected respectively to the front and rear support rods to position the front and rear support rods between the left and right frame portions;
• and
• each reinforcing part of the pair of left and right frame portions comprises a projected portion projecting in the crane width direction from the main part to extend toward a respective other one of the left and right frame portions and to be directly urged against the horizontal top ends of both of the front and rear support rods.