| 摘要 |
PURPOSE:To obviate in advance any trouble causing damage to a device, etc., when conveying failure happens, by making a spiral roller displaceable in a thrust direction, in case of a conveying device for powdery granules, using said spiral roller. CONSTITUTION:Due to use for a long time, when fur falling out a fur brush and/or fibrous waste paper mixed in toner block up the inlet of a toner recovery element 12 as well as when a great quantity of toner is fed in the course of conveyance due to something unusual in a device or the toner is dissolved by frictional heating during conveying, a large transfer load will act on a spiral roller 7. Since this load converts a part of turning force acting on the roller 7 into a force in a thrust direction, the spiral roller 7 compresses an expanding spring 9 on the shaft end and moves forward, making contact with a shaft transfer detection sensor 11 and making this sensor 11 to detect a state of transfer failure. Power transmission to the spiral roller 7 is intercepted whereby the roller 7 is stopped with a detection output signal and a related signal is displayed on a display panel. |
