Sheet skew feeding correction device and image forming apparatus

A sheet skew feeding correction device comprising:

• a first sheet conveying portion that conveys a sheet;
• a second sheet conveying portion that is disposed at the downstream side of the first sheet conveying portion in a sheet conveying direction and conveys a sheet while nipping the sheet;
• a moving member that includes a sheet stopping portion located at a position on the upstream of a nip portion of the second sheet conveying portion in the sheet conveying direction so as to stop the leading end of the sheet while abutting the leading end of the conveyed sheet and is movable between a first posture in which the sheet stopping portion stops the leading end of the sheet conveyed by the first sheet conveying portion and a second posture which allows the passage of the sheet;
• an urging portion that urges the moving member so that the sheet stopping portion is in the first posture;
• a movable fixing portion that fixes the sheet stopping portion in the first posture and is able not to fix the sheet stopping portion in the first posture so that the sheet stopping portion is movable between the first posture and the second posture;
• and
• a controller that controls the first sheet conveying portion, the second sheet conveying portion, and the fixing portion, performs a first mode in which the leading end of the sheet abuts the sheet stopping portion in the first posture while the sheet stopping portion is not fixed in the first posture by the fixing portion and the sheet moves the sheet stopping portion toward the second posture against the urging force of the urging portion and a second mode in which the leading end of the sheet abuts the sheet stopping portion while the sheet stopping portion is fixed in the first posture by the fixing portion, the fixing operation of the sheet stopping portion is released, and the sheet moves the sheet stopping portion to the second posture against the urging force of the urging portion.

An image forming apparatus comprising:

• a first sheet conveying portion that conveys a sheet;
• a second sheet conveying portion that is disposed at the downstream of the first sheet conveying portion in a sheet conveying direction and conveys a sheet while nipping the sheet;
• an image forming portion that forms an image on the sheet conveyed by the second sheet conveying portion;
• a moving member that includes a sheet stopping portion located at a position on the upstream of a nip portion of the second sheet conveying portion in the sheet conveying direction so as to stop the leading end of the sheet and is movable between a first posture in which the sheet stopping portion stops the leading end of the sheet conveyed by the first sheet conveying portion and a second posture which allows the passage of the sheet;
• an urging portion that urges the moving member so that the sheet stopping portion is in the first posture;
• and
• a controller that controls the first sheet conveying portion and the second sheet conveying portion, performs a first mode in which the leading end of the sheet conveyed by the first conveying portion abuts the sheet stopping portion in the first posture, and the sheet is nipped by the second conveying portion operating to convey the sheet while the sheet moves the sheet stopping portion toward the second posture against the urging force of the urging portion and a second mode in which the leading end of the sheet conveyed by the first conveying portion abuts the sheet stopping portion in the first posture, the sheet moves the sheet stopping portion against the urging force of the urging portion, and the leading end of the sheet abuts the nip portion of the stopped second sheet conveying portion so that the sheet is formed in a loop shape.

A sheet conveying apparatus comprising:

• a conveying portion that conveys a sheet;
• a pair of rotating members that is disposed at the downstream of the conveying portion in a sheet conveying direction and conveys the sheet while nipping the sheet at a nip portion;
• a movable moving member that includes a sheet stopping portion disposed at the upstream of the nip portion of the pair of rotating members in the sheet conveying direction so as to stop the leading end of the conveyed sheet;
• an urging portion that urges the moving member toward a position where the leading end of the sheet abuts the sheet stopping portion;
• and
• a controller that performs a first mode in which the sheet is nipped by the pair of rotating members being rotating while the leading end of the sheet conveyed by the conveying portion moves the moving member against the urging force of the urging portion and a second mode in which the leading end of the sheet abuts the pair of rotating members being stopped while the leading end of the sheet conveyed by the conveying portion moves the moving member against the urging force of the urging portion.