Image forming apparatus

摘要

An image forming apparatus includes: a main body casing; a fixing unit accommodated in the casing and including a heating member and a pressing member; a first wall provided inside the casing at a position above the heating member and the pressing member and extending diagonally downward and forward; an uneven portion provided on the first wall at a position rearward of front end portion of the pressing member to restrain a dew droplet condensed on the first wall from running down along the first wall; a sheet ejection opening formed in the casing such that the recording sheet conveyed out from the fixing unit is ejected outside the casing through the sheet ejection opening; and an exhaust opening formed in the casing at a position rearward of the heating member such that air heated in the fixing unit is discharged outside the casing through the exhaust opening.

主权项

1. An image forming apparatus comprising:
a main body casing; a fixing unit accommodated in the main body casing and including a heating member configured to thermally fix a developer image on a recording sheet, and a pressing member disposed opposite to the heating member at a position diagonally upward and rearward of the heating member and configured to convey the recording sheet while the recording sheet is nipped between the heating member and the pressing member; a sheet ejection opening provide at a position frontward of the fixing unit in a front-rear direction of the image forming apparatus such that the recording sheet conveyed out from the fixing unit is ejected outside the main body casing through the sheet ejection opening; an exhaust opening formed in the main body casing at a position rearward of the heating member in the front-rear direction such that air heated by heating member is discharged outside the main body casing through the exhaust opening; a first wall provided inside the main body casing at a position above the heating member and the pressing member and extending diagonally downward and frontward from a position overlapping the exhaust opening as viewed from above to a position overlapping the heating member as viewed from above, the first wall having a lower surface facing the heating member and the pressing member and slanted such that a portion of the lower surface closer to the exhaust opening is higher than a portion of the lower surface closer to the heating member; a stepped portion provided on the lower surface of the first wall at a position rearward of a front end portion of the pressing member, and configured to restrain a dew droplet condensed on the first wall from running down along the first wall; and a third wall extending diagonally upward and frontward from a front end portion of the first wall and configured to guide the recording sheet conveyed by the heating member and the pressing member to the sheet ejection opening, wherein a plurality of ribs are provided spaced apart from each other in a right-left direction, at a lower surface of a corner portion at which the first wall and the third wall are connected, and each of the ribs protrudes downward to form a downwardly narrowing portion, and wherein lower-most portions of the ribs are arranged rearward of a lower-most portion of the corner portion.