Guide structure of lifting tray and guide rail and rolled steel collecting system comprising guide structure

The utility model provides a guiding structure of a lifting tray and a guide rail and a rolled steel collecting system comprising the guiding structure, and the guiding structure comprises the guide rail which is provided with a first guiding surface and a second guiding surface; the lifting tray comprises a rack, two sets of first guide wheels, two sets of second guide wheels and an adjusting device, and the two sets of first guide wheels are rotationally installed on the two sides, in the width direction, of the rack correspondingly and abut against the first guide faces on the two sides of the guide rail; the two sets of second guide wheels are movably installed on the two sides of the rack in the width direction respectively and abut against and disengage from the second guide faces on the two sides of the guide rail under adjustment of the adjusting device. The guide rail is used in the field of rolled steel collection, when the lifting tray runs and the first guide face of the guide rail is abraded, the