| 摘要 |
PURPOSE:To prevent generation of short circuit between phases of grounding, by separating each contact portion between plural trolley conductors and corresponding trolley electrodes from adjacent contact portion, so as to limit a conductive whisker generated at the contact portions to a generation area. CONSTITUTION:There are arranged in a duct 1 plural trolley conductors 3 which are separated as its interphase by an insulator 2. Each conductor 3 is in contact with each trolley electrode 4 arranged on a base 7 having wheels 9. The trolley electrodes 4 are moved relative to the trolley conductors 3 by a movement of the base 7. In this case, there is generated a conductive whisker, which is a conductive burr, at angular portions 5 of the trolley conductors 3, and the whisker tends to extend to adjacent trolley conductor 3. To cope with this problem, and the contact portion between the trolley conductors 3 and the trolley electrodes 4, that is, the conductive whisker generation area is formed to a groove in such a manner that the angular portion of the trolley conductors 3 is surrounded by both edgs of the contact portion. Thus, the conductive whisker may be limited to its generation area. |
