Conveyance apparatus

A conveyance apparatus comprising:

• a fork unit;
• a lift unit configured to drive the fork unit upward and downward;
• a movable cart unit configured to support the lift unit and be movable on a traveling surface by driving a drive wheel;
• an auxiliary leg unit provided for the movable cart unit, the auxiliary leg unit being movable along a longitudinal direction of the fork unit and having an auxiliary wheel a position of which is changeable relative to the movable cart unit;
• a distal end support mechanism provided on a distal end side of the fork unit, the distal end support mechanism being switchable between a non-contact state with the traveling surface and a contact state with the traveling surface;
• a load weight detection unit configured to detect a weight of a load supported by the fork unit;
• a gravity center position calculation unit configured to calculate a position of a center of gravity of the conveyance apparatus that conveys the load based on the weight of the load;
• and
• an overturning prevention control unit configured to determine whether or not the conveyance apparatus overturns when the conveyance apparatus conveys the load based on the position of the center of gravity and movement acceleration/deceleration of the movable cart unit that is set, the overturning prevention control unit being configured to, when the overturning prevention control unit determines that the conveyance apparatus overturns, bring the distal end support mechanism in the non-contact state with the traveling surface into contact with the traveling surface, move the auxiliary leg unit such that the auxiliary wheel is brought into contact with the traveling surface behind the drive wheel, or reduce the movement acceleration/deceleration.