Paper floating detection apparatus, paper conveyance apparatus and image recording apparatus

摘要

A paper floating detection apparatus is arranged at a conveyance path of a conveyance device which holds paper on a conveyance surface and conveys the paper in a conveyance direction while causing a surface of the paper to face a droplet ejection head. The detection apparatus includes: a light emission unit and a light reception unit arranged to face each other across the conveyance path, such that an optical path of detection light emitted from the light emission unit and received by the light reception unit is substantially perpendicular to the conveyance direction, floating up of the paper from the conveyance surface being detected by detecting that the conveyed paper has shielded the detection light; and an air flow diverting guide member which is arranged in a periphery of the optical path and configured to prevent inflow of air having a temperature differential sufficient to affect the optical path.