Book storage and transportation bin

摘要: A rectangular bin for storing and transporting books at a sorting station in library has base on wheels with four side walls horizontal floor panel movable vertically within the bin. An optical sensor is mounted adjacent upper rim controlled by control unit such that during filling mode of bin, detection book interrupting beam lowers so as to allow further up height an unloading operation reversed. battery pack located cavity front wall when being charged loading automatically operates disconnected mode. The actuator two pairs levers electrically actuated screw moving lower end housed bottom housing hung below base.