| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder conveying device that uses a volume-type reciprocating pump capable of suppressing scattering of fine powder at a conveyance destination.SOLUTION: In a toner supply device using a diaphragm pump for conveying sub-hopper supply toner from a toner container, a drive time t2 during exhaustion in which a transmission unit member is pressed against a diaphragm by the rotation of an eccentric shaft to generate positive pressure, is set longer than a drive time t1 during sucking in which the diaphragm is pulled up by the transmission unit member by rotation of the eccentric shaft 44 to generate negative pressure in an inner space formed by the diaphragm and a pump case of the diaphragm pump. |
