| 摘要 |
A vertical storage device has a number of storage platforms carried by a pair of endless chains which move the platforms from a lowermost loading and unloading station to various storage positions on one side or the other of the device. On each end of each platform is a v-shaped yoke with a traveler at the free end of each leg of the yoke. A pair of semi-circular tracks carried by a track guide serve the bottom and top of the device, at each end, one track being receptive of one of the travelers and the other track being receptive of the other traveler. The tracks cross each other midway between opposite ends forming an open intersection so that a traveler which is on the inside of path crosses over upon a reversal of direction and becomes the outside traveler. A pair of interconnected switch tongues at the intersection is moved to one position or another when pressed against by the first traveler to reach the intersection making certain that each traveler travels in the right track. |
