US Patent 11834278 Article transport vehicle

A swing arm changes a position of a placement surface of a placement body between a horizontal position and a tilted position by swinging between a reference position at which the swing arm extends along an opposing surface facing a lower surface of the placement body and a standing position at which the swing arm is tilted relative to the opposing surface. The opposing surface is provided with a guide member configured to guide swinging movement of the swing arm, and the guide member is configured to support the swing arm by sandwiching the swing arm from both sides in an axial direction within a prescribed guide range including the reference position in a total swing range of the swing arm.