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US 12,625,454 B2Granted
Sheet conveying device, image processing apparatus, and drive control method capable of suppressing temperature rise of motor with simple configuration
AssigneeKYOCERA Document Solutions Inc.
InventorTung Son Nguyen
Life of this patent
Estimating the term…
Abstract
A sheet conveying device includes a motor, a first determination processing portion, and a first restriction processing portion. The motor is used to convey a sheet. The first determination processing portion determines, each time a predetermined determination timing arrives during drive of the motor, whether or not a total drive time of the motor in a predetermined determination period up to the arrival of the determination timing exceeds a predetermined first time. The first restriction processing portion restricts the drive of the motor when the first determination processing portion determines that the total drive time exceeds the first time.
Claims4
A sheet conveying device comprising:
- a motor used to convey a sheet;
- a first determination processing portion configured to determine, each time a predetermined determination timing arrives during drive of the motor, whether or not a total drive time of the motor in a predetermined determination period up to the arrival of the determination timing exceeds a predetermined first time;
- a first restriction processing portion configured to restrict the drive of the motor when the first determination processing portion determines that the total drive time exceeds the first time;
- a second determination processing portion configured to determine whether or not an elapsed time from start of the drive of the motor immediately before a reference time at which the drive of the motor is started to the reference time exceeds a length of the determination period;
- and
- a second restriction processing portion configured to restrict the drive of the motor when the second determination processing portion determines that the elapsed time exceeds the length of the determination period and a time of the drive of the motor from the reference time exceeds a second time that is shorter than the first time, wherein
- the first restriction processing portion switches, when the first determination processing portion determines that the total drive time exceeds the first time, a conveying mode of the sheet from a normal conveying mode in which the motor is continuously driven to a low-speed conveying mode in which the motor is intermittently driven,
- the first restriction processing portion determines, when the conveying mode is shifted to the low-speed conveying mode, whether or not the total drive time of the motor in the determination period is equal to or less than a third time, which is shorter than the first time, every time the determination timing arrives, and
- the first restriction processing portion switches, when it is determined that the total drive time is equal to or less than the third time, the conveying mode from the low-speed conveying mode to the normal conveying mode.
6 more elements
A drive control method executed in a sheet conveying device including a motor used to convey a sheet, comprising:
- a first determination step of determining, each time a predetermined determination timing arrives during drive of the motor, whether or not a total drive time of the motor in a predetermined determination period up to the arrival of the determination timing exceeds a predetermined first time;
- a first restriction step of restricting the drive of the motor when it is determined in the first determination step that the total drive time exceeds the first time;
- a second determination step of determining whether or not an elapsed time from start of the drive of the motor immediately before a reference time at which the drive of the motor is started to the reference time exceeds a length of the determination period;
- and
- a second restriction step of restricting the drive of the motor when it is determined in the second determination step that the elapsed time exceeds the length of the determination period and a time of the drive of the motor from the reference time exceeds a second time that is shorter than the first time, wherein
- in the first restriction step, when the first determination step determines that the total drive time exceeds the first time, a conveying mode of the sheet is switched from a normal conveying mode in which the motor is continuously driven to a low-speed conveying mode in which the motor is intermittently driven,
- in the first restriction step, when the conveying mode is shifted to the low-speed conveying mode, whether or not the total drive time of the motor in the determination period is equal to or less than a third time, which is shorter than the first time, is determined every time the determination timing arrives, and
- in the first restriction step, when it is determined that the total drive time is equal to or less than the third time, the conveying mode is switched from the low-speed conveying mode to the normal conveying mode.
5 more elements
Dependencies are inferred from the claim text.