| 摘要 |
PURPOSE: A stacker crane is provided to increase the rigidity of the frame structure of the stacker crane in the travel direction and restrict swing in the travel direction by connecting the upper part of the mast and the upper part of the ladder with the upper frame, and to simplify the structure by decreasing the thickness of the mast. CONSTITUTION: A mast in a conventional stacker crane is configured to extend in a vertical direction. Accordingly, the mast is not sufficiently rigid, and swings in a running direction during running or when the running operation is stopped. An attempt to increase the rigidity results in a thicker mast, thus increasing the size of the stacker crane. A stacker crane comprises a mast(146) extended vertically from a lower frame(145) and a platform(134) that elevates and lowers along the mast, wherein a ladder(147) is extended vertically at a position opposite to the mast across the platform in a direction in which the lower frame runs. A top of the mast is connected with a top of the ladder via an upper frame(148). Working is performed easily at the high land by using the ladder.
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