Article conveyance device

An article conveyance device, comprising:

• a support pillar having a longitudinal direction corresponding to an up-and-down direction;
• an ascending and descending stage provided so as to be movable in the up-and-down direction along the support pillar;
• a toothed belt stretched from the ascending and descending stage both upward and downward along the support pillar;
• a first pulley provided to the support pillar on one side with respect to the ascending and descending stage in the up-and-down direction, the toothed belt being wound around the first pulley;
• a second pulley provided to the support pillar on the other side with respect to the ascending and descending stage in the up-and-down direction, the toothed belt being wound around the second pulley;
• a drive device that drives the first pulley to rotate, the first pulley being a toothed pulley that meshes with the toothed belt, the second pulley being a flat pulley;
• and
• a counter weight that moves in a direction opposite to a moving direction of the ascending and descending stage when the ascending and descending stage moves,
• the toothed belt including
• a first toothed belt that is wound around the first pulley to connect the ascending and descending stage and the counter weight to each other, and
• a second toothed belt that is wound around the second pulley to connect the ascending and descending stage and the counter weight to each other.