Heliostat apparatus and solar heat collecting apparatus and concentrating photovoltaic apparatus

A heliostat apparatus that adjusts an angle of a reflecting surface of at least one reflecting mirror to follow the movement of the sun, the heliostat apparatus comprising:

• one mirror frame to support the at least one reflecting mirror;
• a pair of north-south rotational shafts whose rotational axial direction is the east-west direction for the purpose of rotating the mirror frame in the north-south direction, the pair of the north-south rotational shafts being connected to the mirror frame;
• an east-west rotational shaft whose rotational axial direction is the north-south direction for the purpose of rotating the mirror frame in the east-west direction;
• a pair of arms projecting from the east-west rotational shaft to the east and the west;
• and a support that supports the east-west rotational shaft and allows the axial rotation of the east-west rotational shaft, wherein,
• the pair of the north-south rotational shafts, capable of axial rotation, is positioned on the ends of the pair of the arms such that the north-south rotational shafts face each other;
• with the east-west rotational shaft as the rotational axis, the pair of the arms, the pair of the north-south rotational shafts, and the mirror frame are rotated as an integrated unit in the east-west direction, such that the angle of the reflecting surface of the at least one reflecting mirror supported by the mirror frame is adjusted in the east-west direction;
• and,
• with the pair of the north-south rotational shafts as the rotational axis, the mirror frame is rotated in the north-south direction such that the angle of the reflecting surface of the at least one reflecting mirror is adjusted in the north-south direction.