Amphibious vehicle

An amphibious vehicle comprising:

• a vehicle body;
• a flap supported at a lower portion in a traveling direction of the vehicle body to be capable of swing in a direction in which an upper edge portion approaches and separates from the vehicle body;
• a support column which has a fluid actuator capable of expanding and contracting in accordance with a pressure of a working fluid supplied to a cylinder chamber, is connected to the flap in at least a first end portion in a longitudinal direction, and performs adjustment of a swinging angle of the flap by expansion and contraction of the fluid actuator;
• a power source which supplies the working fluid to the cylinder chamber;
• and
• a safety valve which communicates with the cylinder chamber, and opens when an internal pressure of the cylinder chamber becomes greater than a predetermined pressure to be able to discharge the working fluid in the cylinder chamber
• wherein the flap has
• a first flap supported by the vehicle body, and
• a second flap supported by the first flap,
• the support column includes
• a first support column which adjusts a swinging angle of the first flap with respect to the vehicle body, and
• a second support column which adjusts a swinging angle of the second flap with respect to the first flap, and
• the safety valve includes
• a first safety valve which communicates with a cylinder chamber of the first support column and opens when the internal pressure of the cylinder chamber of the first support column becomes larger than a predetermined pressure to be able to discharge the working fluid in the cylinder chamber of the first support column, and
• a second safety valve which communicates with a cylinder chamber of the second support column and opens when the internal pressure of the cylinder chamber of the second support column becomes greater than a predetermined pressure to be able to discharge the working fluid in the cylinder chamber of the second support column.