| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric winch capable of reducing uncomfortable operation noise, and stably preventing the looseness of a belt, and a wheelchair traction device. SOLUTION: A one-way clutch 24 is provided between a drum 25 and an electric motor 5, and a loosenss-removing mechanism 71 giving a rotary force toward a take-up direction of a belt 2 is provided at the drum 25. The one-way clutch 24 is configured to transmit a drive force of the electric motor 5 to the drum 25 only when the rotary force based on the tension of the belt 2 is given to the drum 25. The loosenss-removing mechanism 71 has a small electric motor continuously driven to give the rotary force to the drum 25. COPYRIGHT: (C)2011,JPO&INPIT |
