Patent application number | Description | Published |
20080211176 | Image forming apparatus - A common driving source transmits a drive force to a driving unit that drives a feeding unit and a conveying unit. The driving source is a motor that rotates in either of a normal direction and a reverse direction. The feeding unit includes a mechanical drive-blocking mechanism in its driving sequence. The conveying unit includes a two-system driving sequence and a mechanical drive-blocking mechanism in the driving sequence so as to rotate in one direction regardless of a rotating direction of the driving source. A reduction ratio of each driving sequence in the conveying unit is identical. | 09-04-2008 |
20090017953 | Rotary drive device and image forming apparatus - A rotary drive device includes a motor including a rotary shaft, a planetary gear mechanism, and a rotation position detector. The planetary gear mechanism decelerates a rotation output of the motor at a reference reduction ratio and includes an outer gear, multistage gears, and an output shaft. The outer gear is fixed to a housing of the motor. The multistage gears are provided inside the outer gear. The output shaft transmits the decelerated rotation output of the motor to an outside of the rotary drive device. The rotation position detector detects a rotation position of the output shaft to control rotation of the motor. The motor, the planetary gear mechanism, and the rotation position detector are combined into a single integrated unit and aligned in an axial direction of the rotary shaft of the motor. | 01-15-2009 |
20090169225 | Driving control device and image forming apparatus including the same - A driving control device for use in an image forming apparatus includes a control unit that analyzes any one of a speed variation pattern and a thickness variation pattern of an endless belt member of the image forming apparatus per at least one rotation of the endless belt member while endlessly moving the endless belt member by a driving rotating unit, and starts to execute, based on a result of analysis, a driving-speed-control-pattern updating process to update a driving speed control pattern of the driving rotating unit per at least one rotation of the endless belt member, after a power of an image forming apparatus is turned on and within a preparation period in which a predetermined preparation process is completed so that an image forming operation can be started based on an image formation command from an operator. | 07-02-2009 |
20090169259 | Driving-force transmission device and image forming apparatus - A driving-force transmitting member is formed of a material having a linear expansion coefficient larger than that of a sleeve bearing, and Δx1>r1×Δt×a−R1×Δt×b is satisfied, where R1 is inner radius of the sleeve bearing, r1 is outer radius of a rotary shaft unit, Δx1 is difference between the inner radius R1 and the outer radius r1 at a reference temperature, Δt is maximum amount of temperature change of the driving-force transmitting member relative to the reference temperature, a is linear expansion coefficient of the sleeve bearing, and b is linear expansion coefficient of the driving-force transmitting member. | 07-02-2009 |
20090190972 | BELT DRIVE CONTROL UNIT, BELT DRIVE CONTROL METHOD, BELT DRIVE CONTROL PROGRAM, AND IMAGE FORMING APPARATUS USING SAME - A belt drive control unit controls a rotation of belt supported by first and second rollers. Each of rotations of the first and second rollers are detected as first and second results. A rotation of the first roller is controlled in connection with thickness fluctuation in the belt using the first and second results. The belt drive control unit includes a sampling data acquisition unit, a correction value generator, a correction value storage, and a correction value reading controller. The sampling data acquisition unit obtains sampling data by sampling a difference value between the first and second results. The correction value generator generates correction value data for the belt based on the sampling data. The correction value storage stores the correction value data. The correction value reading controller reads the correction value data based on a rotation number of the belt to control a rotation of the first roller. | 07-30-2009 |
20090238613 | BELT DRIVE CONTROL DEVICE, BELT DEVICE, IMAGE FORMING APPARATUS, AND BELT DRIVE CONTROL METHOD - A belt drive control device includes: first and second detection devices which detect the angular displacement or velocity of a driven rotary member and the angular displacement or velocity of a drive rotary member, respectively; an extraction device which extracts, from the difference between the detection results of the first and second detection devices, the amplitude and phase of a variation component due to belt thickness variation; a control device which controls the rotation of the drive rotary member in accordance with the extracted amplitude and phase; first and second holding devices which hold the extracted amplitude and phase and normal ranges of the amplitude and phase, respectively; and first and second feedback devices which feed back the amplitude and phase to the rotation control, and performs feedback by using a substitution value for the amplitude or phase if the amplitude or phase is out of the normal range, respectively. | 09-24-2009 |
20090263158 | Belt driving device and image forming apparatus - In an image forming apparatus, during a rotation of an intermediate transfer belt performed after a contact-state-changing rotation in which the number of photoconductors contacting the intermediate transfer belt has changed, a control unit of a belt driving device controls the driving speed of a belt driving motor based on a period of the intermediate transfer belt determined in the rotation immediately before the contact-state-changing rotation instead of a period determined in the contact-state-changing rotation. | 10-22-2009 |
20120102677 | FRICTION HINGE FOR A CONSOLE BOX LID - The hinge structure of a console box including a brake shaft and a braking device, arranged in a place displaced in the axial direction of a hinge shaft and disposed on one side of the hinge shaft. When opening and closing a lid, the drive shaft and the hinge shaft rotate in conjunction with the rotation of the lid, while a friction plate between the brake shaft and a braking plate is pressed against the rotating end face and the stationary brake plate, which is secured to a storage box, and a predetermined friction force can be produced continuously. Due to the friction force, the lid can be rotated under the influence of a moderate extent of rotational resistance when opening and closing the lid, and the position of the lid can be kept in the place where the lid stopped rotating within a rotatable range of the lid. | 05-03-2012 |