| 摘要 |
PURPOSE: A trolley is provided to prevent an accident due to contacting of the body of a worker with an electric wire by installing an electric wire combined to a power supply unit and a terminal box in a duct of a trolley. CONSTITUTION: A terminal box(20) is installed in the upper face of a trolley(10), and a power supply unit(30) is installed in the front face of the trolley. The power supply unit is connected with the terminal box via an electric wire(40). A duct(50) is installed while its one end is connected to the inside of the trolley and the other end is connected to the terminal box. As the electric wire is installed in the duct, the electric wire is not exposed to the outside. When a worker walks on the trolley for maintenance, the body of the worker doesn't contact to the electric wire. Therefore, such an accident as disconnection is prevented.
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