| 摘要 |
PURPOSE:To freely regulate the frictional force between a rake and a screen by a method in which a dust cleaning unit is provided on the frame provided in parallel with the screen, and the frame is supported in a freely separable manner with the screen by a supporting mechanism provided on a pond. CONSTITUTION:When a motor 10 is driven, a winding drum 8 is turned, and a rope 5 is rewound, a rake 4 goes down with its tip being separated from the screen 1 under its own weight, and is stopped on a raking position on the lower end of the screen 1. When the motor 10 is inversely turned, the rope 5 is wound around the drum 8 and tensed, and the tip of the rake 4 becomes almost vertical to the screen 1 and goes up on the screen 1. Whereupon, dust 13 adhered to the screen 1 is raked up by the rake 4, dropped on a chute 6, and discharged to the outside. When the raking operation becomes impossible due to excessive friction between the rake 4 and the screen 1, a frame angle regulator 9 is operated, and the frame 2 is clockwise turned at the hinge 7 as a supporting point to widen the interval between the rake 4 and the screen 1. |
