The present disclosure relates to a robot cleaner, more particularly, to a robot cleaner that may be escaped from a trapped state by an escaping unit formed in an inner surface of a wheel, when a body of the robot cleaner is caught in a protrusion to put the robot cleaner in a trapped state where the robot cleaner cannot run during the running on the floor of a cleaning area.

A adjustable caster mounting plate for moving modular structures or other heavy materials with a mounting plate, a caster assembly attached to the bottom of the mounting plate, a primary guide tab attached to the top of the mounting plate, a secondary guide tab attached to the top of the mounting plate, and a mounting tab disposed on the top surface of the mounting plate.