| 摘要 |
PROBLEM TO BE SOLVED: To rotate a signboard pole mounted with one or plural signboards in the case of absence of wind or weak wind with a field standing signboard device. SOLUTION: A rotary pole Pc is inserted into a housing cylinder Pb and a motor M with a reduction gear is mounted at the housing cylinder Pb. A rubber-like ring body 17 mounted at a motor shaft 15 of the motor M with the reduction gear is pressed to an outer peripheral surface 13b of the guide ring 13 mounted at the rotary pole Pc, by which the rotary pole Pc dropped in with the signboard pole Pa is rotated. |
