Image forming apparatus, and toner collecting case for use in image forming apparatus

摘要

In an image forming apparatus, a dust collecting unit is disposed in the front side of image forming units. The dust collecting unit includes a dust collecting box and a fan. The dust collecting box is communicated with developer cases. The fan sucks air in the dust collecting box and discharges the air. The fan sucks air that has passed through a filter in the dust collecting box and discharges the air to an exhaust duct. The exhaust duct is disposed between a toner container and a fixing device and forms an air passage that extends in a front-rear direction to reach an opening portion provided in the rear side. The air is discharged to an outside of the apparatus from the opening portion.

主权项

1. An image forming apparatus comprising:
at least one developing portion each including a toner storing portion storing toner, and configured to perform a developing process by using the toner of the toner storing portion; a transfer portion configured to transfer a toner image formed in the developing process, onto a sheet member; a fixing portion configured to fix, by heating, the toner image transferred onto the sheet member, to the sheet member; a first duct portion communicated with the toner storing portion in such a way as to form a flow-in passage through which air having flowed in from an inside of the toner storing portion passes; a fan configured to suck the air from the flow-in passage of the first duct portion and discharge the air to an outside of the first duct portion; a filter portion disposed in the first duct portion and configured to collect flying toner included in the air that passes through the flow-in passage; a second duct portion extending from an air discharge port of the fan along the fixing portion in a vicinity of the fixing portion in such a way as to form a discharge passage through which the air discharged from the air discharge port passes; and an opening portion formed at an end of the second duct portion in an extension direction thereof in such a way as to allow an inside of the second duct portion to be communicated with an outside of an apparatus main body.