| 摘要 |
PURPOSE:To allow heat generated from a heat source to be hardly transmitted to housed toner by providing ventilation fins generating an air flow for diffusing the heat retained around the outside circumferential part of a toner replenishment container. CONSTITUTION:The ventilation fins generating the air flow for diffusing the heat retained around the outside circumferential part of the toner replenishment container 1 are integrated in a gear part 1A being a driven part when the container 1 is driven to be rotated. When the container 1 is driven to be rotated by a driving device at the replenishing time of toner, the air flow is generated toward a fixing device 5 side from the toner replenishment unit 3 side of the container 1 by the actuation of the ventilation fins. That means, air enters a void 19 between the respective fins and flows around the outside circumferential part of the container 1 along the axial direction of the container 1. Thus, the heat retained around the container 1 is diffused and the heat is hardly transmitted to the toner housed in the container 1. |
