SHEET FEED DEVICE, AND IMAGE FORMING APPARATUS INCLUDING THE SAME

摘要

A sheet feed device includes a device main body, a sheet feed cassette, a sheet conveyance path, a sheet feed roller, a retard roller, a support unit, and a pair of lock mechanisms. The retard roller is disposed to face the sheet feed roller in the device main body and, together with the sheet feed roller, forms a sheet feed nip portion through which the sheet is passed. The support unit is disposed in the device main body and supports the retard roller. The lock mechanisms are supported by the support unit in the device main body so as to face the wall portion of the sheet feed cassette. The lock mechanisms are disposed on both sides of the retard roller in the sheet width direction and lock the sheet feed cassette attached to the device main body and position the sheet feed cassette in the attachment direction.

主权项

1. A sheet feed device comprising:
a device main body; a sheet feed cassette inserted and attached to the device main body in a predetermined attachment direction and including a sheet storage portion and a wall portion, the sheet storage portion storing a sheet, the wall portion standing upright at a position more on a front side in the attachment direction than the sheet storage portion; a sheet conveyance path provided in the device main body and configured to guide the sheet stored in the sheet storage portion into the device main body from an entrance formed more on the front side in the attachment direction than the wall portion; a sheet feed roller disposed at a central portion of the device main body in a sheet width direction crossing the attachment direction, on a side of the entrance of the sheet conveyance path and configured to feed the sheet into the sheet conveyance path; a retard roller disposed to face the sheet feed roller in the device main body and, together with the sheet feed roller, forming a sheet feed nip portion through which the sheet is passed; a support unit disposed in the device main body and supporting the retard roller; and a pair of lock mechanisms supported by the support unit so as to face the wall portion of the sheet feed cassette, the lock mechanisms respectively disposed on both sides of the retard roller in the sheet width direction and configured to lock the sheet feed cassette attached to the device main body and position the sheet feed cassette in the attachment direction.