| 摘要 |
PURPOSE:To prevent the meandering of a conveying belt and to make conveying speed the game at both ends in the width direction of the conveying belt. CONSTITUTION:A meandering detecting means 60 detects the displacement of a conveying belt 28 in the width direction caused by the meandering. A roller moving means 40 is provided on any of plural rollers 26, 27 and 40 so as to move the roller in a rotary shaft direction. A meandering preventing control means 61 controls the movement of the roller of the means 40 so as to negate the displacement of the conveying belt detected by the means 60. |
