Position detection apparatus and image forming apparatus

摘要

A position detection apparatus comprises a sensor unit 80 and a moving holder 81 and a holder drive portion 82. The sensor unit has a plurality of pairs of sensors, each of which includes a light emitting portion held on the first holding surface 81a and a light receiving portion held on a second holding surface 81b as a pair and which are arranged along sheet width direction, and the sensor unit detects the edge position of the sheet S while the holder drive portion moves the moving holder in the sheet width direction and every other light emitting portions in the plurality of pairs of sensors is turned on.

主权项

1. A position detection apparatus comprising:
a sensor unit which includes a light emitting portion and a light receiving portion and detects an edge position in a sheet width direction of a sheet conveyed in a sheet conveying path; a moving holder including a first holding surface that holds the light emitting portion of the sensor unit and a second holding surface that holds the light receiving portion which face each other so that the edge of the sheet passing through the sheet conveying path in the sheet width direction is enclosed, the moving holder being able to reciprocate in the sheet width direction; and a holder drive portion which drives the moving holder in the sheet width direction, wherein the sensor unit has a plurality of pairs of sensors, each of which includes the light emitting portion held on the first holding surface and the light receiving portion held on the second holding surface as a pair and which are arranged along the sheet width direction, and the sensor unit detects the edge position of the sheet while the holder drive portion moves the moving holder in the sheet width direction and every other light emitting portions in the plurality of pairs of sensors is turned on.