| 摘要 |
PROBLEM TO BE SOLVED: To automatically restore an indicating pole to its original indicating position when it is rotated, by mounting an indicating position restoring apparatus having a coil spring on an area between a support pipe and the indicating pole rotatably supported by the same. SOLUTION: A support tube 2 embedded in the ground rotatably supports an almost crank-shaped indicating pole 3. This road boundary indicating pole has an indicating position restoring apparatus 4 having a coil spring 41 mounted on an area between the support tube 2 and the indicating pole 3. Then, engaging pieces 41A, 41B formed on both edges of the spring 41 are engaged with engaged portions 42, 43 attached to the indicating pole 3 and the support tube 2, respectively. When the indicating pole 3 is in the indicating position, the state is held, whereas if the indicating pole 3 is rotated in a manner leaving the indicating position, the pole 3 is restored to the indicating position by a repulsive force of the spring 41. |
