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US 11,987,466 B2Granted
Sheet processing apparatus and image forming system
AssigneeCanon Kabushiki Kaisha
InventorsTakao Izaki, Jun Agata, Yasuhiro Nakahara
Life of this patent
Estimating the term…
Abstract
A sheet processing apparatus includes a first conveyance rotary member, a second conveyance rotary member, a punch member, a sensor, a punch motor, a conveyance motor, a first drive transmission portion including a first number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the first conveyance rotary member, and a second drive transmission portion including a second number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the second conveyance rotary member, the second number being larger than the first number.
Claims22
A sheet processing apparatus comprising:
- a first conveyance rotary member configured to convey a sheet in a sheet conveyance direction;
- a second conveyance rotary member disposed downstream of the first conveyance rotary member in the sheet conveyance direction and configured to convey the sheet;
- a punch member disposed between the first conveyance rotary member and the second conveyance rotary member in the sheet conveyance direction and configured to perform punching on the sheet conveyed by the first conveyance rotary member while rotating;
- a sensor disposed between the first conveyance rotary member and the punch member in the sheet conveyance direction and configured to change an output value based on presence or absence of the sheet at a detection position;
- a punch motor configured to be driven based on a detection result of the sensor and drive the punch member;
- a conveyance motor configured to drive the first conveyance rotary member and the second conveyance rotary member;
- a first drive transmission portion including a first number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the first conveyance rotary member;
- and
- a second drive transmission portion including a second number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the second conveyance rotary member, the second number being larger than the first number,
- wherein the first conveyance rotary member and the second conveyance rotary member convey the sheet, conveyed at a first speed in a position upstream of the first conveyance rotary member in the sheet conveyance direction, at a second speed higher than the first speed, and
- wherein the first conveyance rotary member performs rated rotation to convey the sheet at the second speed after a leading edge of the sheet passes through the first conveyance rotary member and before the leading edge reaches the detection position of the sensor.
8 more elements
The sheet processing apparatus comprising:
- a first conveyance rotary member disposed in a first conveyance path and configured to convey a sheet in a sheet conveyance direction;
- a second conveyance rotary member disposed in the first conveyance path and downstream of the first conveyance rotary member in the sheet conveyance direction and configured to convey the sheet;
- a punch member disposed in the first conveyance path, between the first conveyance rotary member and the second conveyance rotary member in the sheet conveyance direction, and configured to perform punching on the sheet conveyed by the first conveyance rotary member while rotating;
- a sensor disposed between the first conveyance rotary member and the punch member in the sheet conveyance direction and configured to change an output value based on presence or absence of the sheet at a detection position;
- a punch motor configured to be driven based on a detection result of the sensor and drive the punch member;
- a conveyance motor configured to drive the first conveyance rotary member and the second conveyance rotary member;
- a first drive transmission portion including a first number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the first conveyance rotary member;
- a second drive transmission portion including a second number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the second conveyance rotary member, the second number being larger than the first number;
- a reversing portion configured to reverse the sheet received from the first conveyance path;
- a stacking portion on which the sheet reversed by the reversing portion is stacked;
- a second conveyance path extending below the first conveyance path and configured to receive the sheet reversed by the reversing portion and guide the sheet to the stacking portion;
- a discharge portion configured to discharge the sheet to outside of the apparatus;
- a third conveyance path extending from the stacking portion toward the discharge portion and configured to guide the sheet to the discharge portion;
- and
- a rotary member pair disposed in the second conveyance path and configured to discharge the sheet to the stacking portion.
12 more elements
A sheet processing apparatus comprising:
- a first conveyance rotary member configured to convey a sheet in a sheet conveyance direction;
- a second conveyance rotary member disposed downstream of the first conveyance rotary member in the sheet conveyance direction and configured to convey the sheet;
- a punch member disposed between the first conveyance rotary member and the second conveyance rotary member in the sheet conveyance direction and configured to perform punching on the sheet conveyed by the first conveyance rotary member while rotating;
- a sensor disposed between the first conveyance rotary member and the punch member in the sheet conveyance direction and configured to change an output value based on presence or absence of the sheet at a detection position;
- a punch motor configured to be driven based on a detection result of the sensor and drive the punch member;
- a conveyance motor configured to drive the first conveyance rotary member and the second conveyance rotary member;
- a pinion gear fixed to an output shaft of the conveyance motor;
- an output gear fixed to a drive shaft of the first conveyance rotary member;
- and
- an idler gear configured to mesh with the pinion gear and the output gear.
7 more elements
A sheet processing apparatus comprising:
- a first conveyance rotary member configured to convey a sheet in a sheet conveyance direction;
- a second conveyance rotary member disposed downstream of the first conveyance rotary member in the sheet conveyance direction and configured to convey the sheet;
- a punch member disposed between the first conveyance rotary member and the second conveyance rotary member in the sheet conveyance direction and configured to perform punching on the sheet conveyed by the first conveyance rotary member while rotating;
- a sensor disposed between the first conveyance rotary member and the punch member in the sheet conveyance direction and configured to change an output value based on presence or absence of the sheet at a detection position;
- a punch motor configured to be driven based on a detection result of the sensor and drives the punch member;
- a conveyance motor configured to drive the first conveyance rotary member and the second conveyance rotary member;
- an output gear fixed to a drive shaft of the first conveyance rotary member;
- and
- a gear fixed to an output shaft of the conveyance motor and meshes with the output gear.
6 more elements
Dependencies are inferred from the claim text.