| 摘要 |
PURPOSE:To suppress slip of each roller and enhance the durability by forming the lower roller and at least one of the side rollers supporting each electrically driven dolly running along a rail from a plurality of rollers arranged rotatably independent from one another. CONSTITUTION:Electrically driven dollies 3 are supported with possibility of running on a rail 1 fixed to a ceiling, etc., of a factory through a supporting arm 2. A drive motor 4 is installed over each dolly 3, and a drive wheel 6 is mounted on the output shaft 5. A lower roller is arranged under the dolly 3. Side rollers 8 in rolling contact with the side of the rail 1 are furnished above and below the dolly 3 and on the left and right of the front and rear rails 1. Therein the lower roller 7 is composed of a plurality of rollers 7a which are rotatable independently from one another and arranged along the rotary shaft. Each side roller 8 is alike composed of a plurality of rollers 8a in a similar arrangement. |
