Image forming apparatus

摘要

A stapling section staples a sheet has an opening. The opening has a first open side facing a moving direction of a recording medium moved by the medium moving section and a second open side extending along the moving direction. A shutter is near the second open side in the stapling section. The shutter has a first end axially supported in a freely rotatable manner on an upstream side in the moving direction for arranging the sheet at the stapling position, and a second end portion that hangs down toward the downstream side in the moving direction. When the sheet is not in the stapling section, the second end of the shutter hangs down to block the second open side. When the sheet enters the stapling section through the opening section, the second end of the shutter is pushed up by the axially supported end as the support shaft.

主权项

1. An image forming apparatus comprising:
an image forming section that forms an image on a recording medium; a post-processing tray on which the recording medium is temporarily placed for post-processing with respect to the recording medium on which the image is formed; a sheet-discharging tray to which a post-processed sheet is discharged; a branching unit that includes:
a casing with first and second casing sections integrated therein, the first casing section having a conveyance opening facing the post-processing tray,a conveying passage in the first casing section and accommodating movement of the recording medium,a conveying section in the first casing section and conveying the recording medium in a first direction along the conveying passage to the post-processing tray, anda branching lever provided in the first casing section along the conveying passage and configured for guiding the recording medium to be post-processed to the post-processing tray and then guiding the post-processed recording medium from the post-processing tray to the sheet-discharging tray; a medium moving section that moves the recording medium placed on the post-processing tray in a second direction orthogonal to said first direction of the conveying section; a post-processing section in the second casing section and including a post-processing device that performs a post-processing operation with respect to the recording medium at a post-processing position, the second casing section including: a first opening portion that opens to the conveying passage in the first casing section to receive therein a part of the recording medium moved by the medium moving section, a second opening portion that defines a continuation of the conveyance opening and extends from one end of the first opening portion to a predetermined position along the second direction and that allows movement of the recording medium, the second casing section having no opening portion other than the first opening portion for allowing the recording sheet to enter the post-processing position in the second direction; and a shutter near the second opening portion, the shutter having a length extending from a position in proximity to the one end of the first opening portion substantially to the predetermined position of the second opening portion along said second direction, the shutter allowing the recording medium that is moved along said second direction by the medium moving section to enter an area surrounded by the first and second opening portions and prevents entry of an object into the post-processing position from the second opening portion along said first direction as the recording medium retreats from the area.