Transport vehicle

A transport vehicle for transporting an article, the transport vehicle comprising:

• a moving body configured to travel along a travel path;
• a transfer device configured to transfer the article;
• and
• an overturning prevention device configured to prevent overturn, wherein:
• the transfer device comprises:
• a mast fixed to the moving body and disposed along an up-down direction;
• a raising-lowering body configured to be raised and lowered along the mast;
• and
• a transfer machine supported by the raising-lowering body;
• when a direction where the moving body travels is defined as a vehicle-body front-rear direction, a direction perpendicular to the vehicle-body front-rear direction in a top-bottom view is defined as a vehicle-body width direction, a dimension of the moving body in the vehicle-body front-rear direction is defined as a length dimension, a dimension of the moving body in the vehicle-body width direction is defined as a width dimension, and a height from a bottom end of the moving body to an upper end of the mast is defined as a height dimension, the length dimension and the height dimension are larger than the width dimension;
• the overturning prevention device comprises:
• a shaking occurrence information acquisition section configured to acquire shaking occurrence information indicating that shaking of a travel face where the moving body travels is equal to or more than a predetermined reference value;
• a support arm supported by the moving body;
• and
• an arm driving device configured to drive the support arm;
• the support arm is configured to be changeable between a projecting state where the support arm projects outwardly in the vehicle-body width direction from the moving body to be grounded on the travel face outside the moving body in the vehicle-body width direction and a retracted state where the support arm is retracted inside the width dimension of the moving body;
• and
• in a case where the shaking occurrence information acquisition section acquires the shaking occurrence information, the arm driving device executes an arm projecting operation to change the support arm from the retracted state to the projecting state.