Horizontal loading and unloading structure of cargo vehicles

A horizontal loading and unloading structure of cargo vehicles, comprising:

• a base plate;
• a drive chain belt configured to include mutually separated chains, at least a portion of which is always exposed to an upper part on the base plate;
• a passive cover joined to both ends of the drive chain belt in a planar configuration, at least a portion of which is exposed to a lower part to surround the base plate together with the drive chain belt, and configured to have a length of 80% to 120% of a length of the drive chain belt;
• a drive shaft joined to a gear of the drive chain belt at a first stage of the base plate, and transmitting a driving force in a first direction to an upper part of the drive chain belt during a loading process or transmitting the driving force in a second direction to a lower part of the drive chain belt during an unloading process;
• a passive shaft closely joined to the passive cover at a second stage of the base plate, and passively operated in accordance with a movement of the passive cover;
• and
• a driver providing the driving force in the first direction or in the second direction to the drive shaft.