Patent ID: 9586757
Date: 2017-03-07
CPC Classifications: B65G,B66B,B66F

Claim:
1. A stacker crane comprising: a pair of front and back masts disposed in a vertical direction; a platform located between the pair of front and back masts and including a horizontal frame including a transfer device mounted thereon and vertical frames extending from front and back ends of the horizontal frame along the pair of front and back masts; wherein the platform is configured to be raised or lowered with the vertical frames suspended; each of the vertical frames includes a pair of first guide rollers sandwiching one of the pair of front and back masts in a lateral direction perpendicular or substantially perpendicular to a front-back direction and is connected to the horizontal frame to be rotatable with respect to the horizontal frame about an axis extending along the lateral direction; and each of the vertical frames includes a hook spaced from one of the pair of front and back masts and configured to be stopped by the one of the pair of front and back masts spaced from the hook when the vertical frame rotates in a direction in which the vertical frame moves away from the one of the pair of front and back masts.