Patent ID: 8331845
Filing Date: 2012-12-11
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image forming apparatus main body; a cover provided openably/closably with respect to the image forming apparatus main body; a conveyance passage, formed in the image forming apparatus main body, on which a recording medium is conveyed; a detection device that detects movement of the recording medium conveyed on the conveyance passage; a first guide member provided oppositely to the detection device, the first guide member being movable separate from the cover when the cover is opened and fixed when the cover is closed; a second guide member that movably guides the conveyed recording medium; and a holding unit that holds the second guide member in a status where the conveyance passage is opened, wherein a portion of the first guide member is provided further upstream in a recording medium conveyance direction than the second guide member, a first branch passage branched from the conveyance passage and is employed to convey the recording medium passed through the conveyance passage and again pass the recording medium through the conveyance passage; a second branch passage branched from the conveyance passage; and a switching member being movable between wherein the second guide member closes the conveyance passage by its own weight, and opens the conveyance passage by being pressed with the recording medium by conveyance of the recording medium when the switching member is moved to the first position, and is moved to a position so as not to obstruct the conveyance passage and closes the first branch passage when the switching member is moved to the second position.