Article transport facility

An article transport facility comprising:

• travel rails arranged along a travel path;
• a transport vehicle configured to travel along the travel rails and transport an article;
• and
• a control unit configured to control a traveling operation of a travel unit included in the transport vehicle,
• wherein:
• the travel path includes a straight section that is formed in a straight shape in a plan view, and a curved section that is formed in a curved shape in a plan view,
• in the straight section, a first travel rail and a second travel rail among the travel rails are arranged separately on respective sides of a center portion in a widthwise direction of the travel path and, in the curved section, with one out of the first travel rail and the second travel rail being a target rail and the other one being a non-target rail, at least the target rail, out of the target rail and the non-target rail, is arranged along the travel path, and a guide rail that is different from the target rail and the non-target rail is also arranged along the travel path,
• the travel unit includes a first wheel configured to roll on a traveling surface of the first travel rail, a second wheel configured to roll on a traveling surface of the second travel rail, a drive unit configured to rotate the first wheel and the second wheel at the same speed, and a guide wheel configured to roll on a guide surface of the guide rail,
• when a target wheel is the first wheel when the target rail is the first travel rail, and when the target wheel is the second wheel when the target rail is the second travel rail, and a non-target wheel is whichever one of the first wheel and the second wheel is not the target wheel,
• the travel unit travels in the curved section in an orientation in which the target wheel comes into contact with the target rail, the guide wheel comes into contact with the guide rail, and the non-target wheel does not come into contact with the non-target rail, and
• the control unit changes a rotational speed of the first wheel and the second wheel in the curved section relative to a rotational speed of the first wheel and the second wheel in the straight section in accordance with a ratio of a second length, which is a length of the target rail along the travel path, to a first length, which is a length of the curved section along the travel path at the center portion in the widthwise direction of the travel path.