Sheet feeding apparatus and image processing apparatus

A sheet feeding apparatus comprising:

• a feeding roller rotatively driven through a one-way clutch capable of selectively outputting rotation input for feeding a sheet in a sheet by sheet manner;
• an intermediate conveyance roller for conveying the sheet to an image processing section;
• intermediate conveyance roller supporting means for supporting the intermediate conveyance roller, the intermediate conveyance roller supporting means rotatable to a position rendering the intermediate conveyance roller project in a sheet conveyance route and to a position rendering the intermediate conveyance roller escape from the sheet conveyance route;
• and
• a clutch locking mechanism for locking the one-way clutch to stop rotation output given to the feeding roller and for unlocking the one-way clutch,
• wherein the one-way clutch is unlocked at a time that the intermediate conveyance roller is projecting in the sheet conveyance route by rotation of the intermediate conveyance roller supporting means.

A sheet feeding apparatus comprising:

• an intermediate conveyance roller for conveying a sheet to an image processing section;
• intermediate conveyance roller supporting means for supporting the intermediate conveyance roller, the intermediate conveyance roller supporting means rotatable to a position rendering the intermediate conveyance roller project in a sheet conveyance route and to a position rendering the intermediate conveyance roller escape from the sheet conveyance route;
• a feeding roller partly formed with a cutout for feeding the sheet in a sheet by sheet manner;
• and
• a locking mechanism for positioning the feeding roller at a prescribed rotational position,
• wherein the locking mechanism locks the rotation of the feeding roller as the cutout of the feeding roller faces to the sheet conveyance route when the intermediate conveyance roller escapes from the sheet conveyance route by the rotation of the intermediate conveyance roller supporting means, and unlocks the feeding roller when the intermediate conveyance roller projects in the sheet conveyance route by the rotation of the intermediate conveyance roller supporting means.