HORIZONTAL ROTATION AUTOMATIC CORRECTION DEVICE

PROBLEM TO BE SOLVED: To provide a horizontal rotation automatic correction device capable of preventing a fitting body, fitted to a column in a projecting state, from being broken or from changing in fitting angle owing to a shock applied to the fitting body.SOLUTION: A horizontal rotation automatic correction device includes a fixed-side pipe 2 fixed to a column 1 and a rotated-side pipe 3 to which a curve mirror 4 is fixed. The rotated-side pipe 3 is mounted rotatably outside the fixed-side pipe 2 and a cam surface 21 which is cut in a substantially V shape in side view is formed at an upper end of the fixed-side pipe 2. The rotated-side pipe 3 is supported by the fixed-side pipe 2 while a support shaft 31 fixed penetrating an upper part of the rotated-side pipe 3 in a radial direction is placed on a bottom part of the cam surface 21.