Overhead conveyor

An overhead conveyor comprising:

• a monorail (100) disposed on an upper side of a working space;
• a driving trolley (210) having a drive wheel (211) rolling along the monorail (100), and a motor (212) driving the drive wheel (211);
• a driven trolley (220) disposed to be spaced apart from the driving trolley (210) on the monorail (100) and having a driven wheel (221) rolling along the monorail (100);
• a hanger (400) operatively suspended from the monorail (100) through a first frame (214) of the driving trolley (210) and a second frame (224) of the driven trolley (220) so as to carry an object thereon;
• a first friction plate (500) disposed on one side of a flat upper end of the hanger (400);
• a plurality of first jigs (121) extending from the upper side of the working space towards the first friction plate (500) along the monorail (100);
• and
• a friction drive unit (600) having a friction drive wheel (610) disposed on a lower end of the first jig so as to convey the first friction plate (500) in a running direction and a drive motor (620) driving the friction drive wheel (610),
• wherein the hanger (400) is able to be run along the monorail (100) through driving of the driving trolley (210) and/or friction drive unit (600).