Sheet conveyance device and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorYuki Kobayashi
Life of this patent
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Abstract
A sheet conveyance device includes a feeding unit, a first conveyance path, a registration roller pair, a first conveyance roller pair, a first sensor, a second sensor, and a control unit, wherein the control unit controls the first conveyance roller pair to correct skew of the sheet, and when a sheet is conveyed from the first conveyance roller pair toward the registration roller pair, in a case where a time is a first time, the control unit controls the conveyance of the sheet so that the sheet is conveyed toward the second sensor at a first speed, and in a case where a time is a second time longer than the first time, the control unit controls the conveyance of the sheet so that the sheet is conveyed toward the second sensor at a second speed larger than the first speed.
Claims11
A sheet conveyance device comprising:
- a feeding unit configured to feed a sheet from a sheet storage unit configured to store a sheet;
- a first conveyance path on which the sheet fed by the feeding unit is conveyed in a sheet conveyance direction;
- a registration roller pair that is arranged on the first conveyance path, and is configured to come into contact with a leading end of the sheet in the sheet conveyance direction and correct skew of the sheet, and then convey the sheet while nipping the sheet therebetween;
- a first conveyance roller pair that is arranged on the first conveyance path, and is configured to convey the sheet to the registration roller pair;
- a first sensor that is arranged between the first conveyance roller pair and the registration roller pair on the first conveyance path, and is configured to detect the leading end of the sheet;
- a second sensor that is arranged between the registration roller pair and the first sensor, and is configured to detect the leading end of the sheet;
- and
- a control unit configured to control conveyance of the sheet,
- wherein, based on a detection result of the second sensor, the control unit controls the first conveyance roller pair to correct skew of the sheet, and
- wherein, when a sheet is conveyed from the first conveyance roller pair toward the registration roller pair,
- in a case where a time from a timing at which the feeding unit feeds the sheet until the leading end of the sheet is detected by the first sensor is a first time, the control unit controls the conveyance of the sheet so that the sheet is conveyed toward the second sensor in a state in which a conveyance speed of the first conveyance roller pair is a first speed, and
- in a case where a time from a timing at which the feeding unit feeds the sheet until the leading end of the sheet is detected by the first sensor is a second time longer than the first time, the control unit controls the conveyance of the sheet so that the sheet is conveyed toward the second sensor in a state in which a conveyance speed of the first conveyance roller pair is a second speed larger than the first speed.
Dependencies are inferred from the claim text.