Class / Patent application number | Description | Number of patent applications / Date published |
399036000 | Of motive power or driven unit | 18 |
20090097870 | ABNORMAL SOUND DIAGNOSTIC APPARATUS, ABNORMAL SOUND DIAGNOSTIC METHOD, RECORDING MEDIUM STORING ABNORMAL SOUND DIAGNOSTIC PROGRAM AND DATA SIGNAL - An abnormal sound diagnostic apparatus for an image formation device, which includes: a specification section that specifies an independently operable drive section; an operation section that selectively operates the drive section specified by the specification section; a receiving section that receives an abnormal sound confirmation input which is inputted in a case where an abnormal sound occurs by operating the drive section through the operation section; and an identifying section that, on the basis of the abnormal sound confirmation input received by the receiving section, identifies the drive section specified by the specification section as an abnormal sound occurring location. | 04-16-2009 |
20090148173 | Image forming apparatus - An image forming apparatus includes: a rotation shaft ( | 06-11-2009 |
20090202262 | METHOD AND ASSEMBLY FOR GENERATING A GIVEN REVOLVING SPEED OF AN ENDLESS BAND-SHAPED IMAGE SUPPORT - In a method to determine a curve of revolution speed of a continuous belt-shaped image substrate, at least two color separations are generated on the image substrate and transferred from the image substrate onto a substrate material to generate a print image. A first offset in a transport direction of the substrate material between the at least two color separations of the print image is determined at a first point. At least one second offset in the transport direction is determined between the at least two color separations of the print image at least one second point. The first point and the second point have at least one interval relative to one another in the transport direction. The curve of the revolution speed of the image substrate is determined with aid of the first offset and the second offset. | 08-13-2009 |
20090324262 | Image forming apparatus - An image forming apparatus is disclosed that includes an image carrier, a driving source, a rotation detection unit, and a control unit that performs fluctuation pattern recognition processing, control pattern construction processing, speed fine-adjustment processing, and remaining pattern recognition processing. The control unit is configured to perform control pattern correction processing for setting a frequency band of a remaining speed fluctuation to be detected by the remaining pattern recognition processing narrower than a frequency band of a speed fluctuation to be detected by the fluctuation pattern recognition processing and correcting the speed control pattern so as to be a pattern capable of reducing even the remaining speed fluctuation based on a remaining speed fluctuation pattern recognized by the remaining pattern recognition processing. | 12-31-2009 |
20100080581 | Image-Forming Device - In the image-forming device, the second driving force is transmitted from each input coupling to the corresponding output coupling to rotate the corresponding photosensitive drum when each input coupling is positioned at a predetermined position for the corresponding output coupling. The first detecting unit and the second detecting units detect a position of each input coupling and a position of each output coupling respectively before the first driving unit begins to provide the first driving force and the second driving unit begins to provide the first driving force. The calculating unit calculates, based on the position of each input coupling and the position of each output coupling, a first start timing when a first photosensitive drum starts to rotate and a second start timing when a second photosensitive drum starts to rotate. The controlling unit controls the first driving unit to begin to provide the first driving force after the first start timing and before the second start timing. | 04-01-2010 |
20100142979 | MOTOR CONTROL APPARATUS AND IMAGE FORMING APPARATUS - An image forming apparatus which forms an image on a sheet by using an image bearing member, the image forming apparatus includes a motor configured to rotate the image bearing member, a speed detection unit configured to detect a rotation speed of the motor or the image bearing member, a feedback control unit configured to supply the motor with a PWM signal which is acquired by performing a pulse width modulation on a feedback control value which is based on a target rotation speed, the rotation speed detected by the speed detection unit, and a feedback gain, and a gain updating unit configured to sample the PWM signal output from the feedback control unit during the image bearing member is in a steady rotation for an image forming operation and update the feedback gain based on the sampled PWM signal. | 06-10-2010 |
20100266298 | IMAGE FORMING APPARATUS - Disclosed is an image forming apparatus, which makes it possible to appropriately conduct a controlling operation for eliminating the velocity fluctuation of the photoreceptor drum without generating any malfunction. The apparatus includes a photoreceptor member driven by a motor and a control section that is provided with a feed forward controlling section that stores parameters derived from driving errors for one revolution of the photoreceptor member to create a reverse-phase instruction value based on the parameters and a feedback controlling section that controls a velocity of the photoreceptor member, so as to keep the velocity of the photoreceptor member constant. During an initial operating time, the control section deactivates the feed forward controlling section, while only activates the feedback controlling section to drive the photoreceptor member so as to measure a driving toque of the driving motor, and selects a parameter from the parameters, corresponding to the driving toque measured. | 10-21-2010 |
20100266299 | METHOD AND APPARATUS FOR IMAGE FORMING CAPABLE OF EFFECTIVELY ELIMINATING COLOR DISPLACEMENT BY RECOGNIZING A ROTATIONAL POSITION OF A ROTATING MEMBER WITH A MECHANISM USING DETECTION MARKS - An image forming apparatus includes a rotating member, a motor configured to rotate the rotating member, and a marking member having primary and secondary portions. The image forming apparatus also includes a mark sensor configured to detect the primary and secondary portions, and output a primary signal and a secondary signal, and a position sensor configured to determine a rotational position of the rotating member based on a primary reception time of one of the primary and secondary signals that comes immediately after the other of the primary and secondary signals when the position sensor receives the other of the primary and secondary signals at a start of a mark detecting operation. Further, the image forming apparatus includes a motor controller configured to control the motor based on the recognition result and make the rotational position consistent with a target position at a predetermined time during the mark detecting operation. | 10-21-2010 |
20110129241 | IMAGE FORMING APPARATUS USING PLURALITY OF ROTATION MEMBERS, AND CONTROL METHOD THEREOF - An image forming apparatus includes first and second rotation members which are a plurality of rotation members for performing image formation and rotate in contact with each other. A first driving motor drives the first rotation member. A second driving motor drives the second rotation member. The obtaining unit obtains pieces of motor driving information about driving states of the first or second driving motor at respective relative driving speeds when the relative driving speed of the second driving motor with respect to the driving speed of the first driving motor is changed to a plurality of relative driving speeds. The control unit controls the driving speed of at least either the first or second driving motor in image formation to reduce the relative speed difference between the circumferential velocities of the first and second rotation members based on the pieces of motor driving information obtained by the obtaining unit. | 06-02-2011 |
20110229163 | LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY - A load abnormality detection apparatus detects a load abnormality in at least one of a first rotational member and a second rotational member. An element acquisition part acquires a first control element and a second control element. A first comparison part compares the first control element with a first threshold value and also compares the first control element with a second threshold value larger than the first threshold value. A second comparison part compares the second control element with a third threshold value and also compares the second control element with a fourth threshold value larger than the third threshold value. An abnormality detection part detects a load abnormality in a load applied to at least one of the first and second rotational members based on results of comparison by the first comparison part and the second comparison part and identifies a cause of the detected load abnormality. | 09-22-2011 |
20110229164 | ELECTRONIC DEVICE, MALFUNCTION DETERMINING METHOD, AND COMPUTER PROGRAM PRODUCT - An electronic device including a first motor, the electronic device including: a first movable body that is driven to move by the first motor; a detecting unit that detects a signal according to rotation of the first motor or movement of the first movable body; an analyzing unit that performs frequency analysis of the signal and generates an analysis result with respect to each frequency; and a determining unit that determines presence or absence of malfunction of the first motor or the first movable body based on an analysis result of a first frequency preset with respect to the first motor or the first movable body out of frequencies, and determines presence or absence of malfunction of a part other than the first motor and the first movable body on the basis of an analysis result of a second frequency preset with respect to the part out of the frequencies. | 09-22-2011 |
20120070168 | LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY - A load abnormality detection apparatus detects a load abnormality in first and second rotational members acting on each other. An inclination calculation part calculates an inclination of a second control element. A first comparison part compares a first control element with a first threshold value and also with a second threshold value larger than the first threshold value. A second comparison part compares an inclination of change in the second control element with a third threshold value of a negative value and also with a fourth threshold value of a positive value. An abnormality detection part detects a load abnormality in a load applied to the first rotational member and the second rotational member based on results of comparison by the first comparison part and the second comparison part and identifies a cause of the detected load abnormality. | 03-22-2012 |
20120207493 | ROTATING MECHANISM DRIVING APPARATUS, IMAGE FORMING APPARATUS, NON-TRANSITORY READABLE MEDIUM IN WHICH COMPUTER PROGRAM FOR EXECUTING METHOD FOR DRIVING THE ROTATING MECHANISM IS RECORDED, ROTATING MECHANISM DRIVING SYSTEM AND IMAGE FORMING SYSTEM - A rotating mechanism driving apparatus is disclosed that includes a frictional transmission configured to output torque via a viscous fluid, the torque being input from the motor; an input shaft rotational amount detecting part configured to detect a rotational amount of an input shaft of the frictional transmission; an output shaft rotational amount detecting part configured to detect a rotational amount of an output shaft of the frictional transmission; an input torque detecting part configured to detect input torque of the frictional transmission; a slip amount calculating part configured to calculate a slip amount between the input shaft and the output shaft; and abnormal state determining part configured to determine abnormal state of a rotating mechanism connected to the output shaft of the frictional transmission based on the input torque and to determine an abnormal state of the frictional transmission based on the slip amount. | 08-16-2012 |
20130084086 | TECHNOLOGY FOR PREVENTING IMAGE DEFECTS IN IMAGE FORMING APPARATUS - A secondary transfer motor drive control unit drives a secondary transfer motor such that an intermediate transfer belt and a secondary transfer roller satisfy a follower condition. When the follower condition is satisfied, a difference in the circumferential surface speeds of the intermediate transfer belt and the secondary transfer roller can be appropriately controlled to the extent that color misregistration and image defects do not easily occur. | 04-04-2013 |
20130272728 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information. | 10-17-2013 |
20130343772 | LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY - A load abnormality detection apparatus includes first and second rotational members that contact each other directly or via a recording medium interposed therebetween, a first motor that drives the first rotational member and is controlled by a first drive current and a second motor that drives the second rotational member and is controlled by a second drive current. The load abnormality detection apparatus further includes a current detection part configured to detect the first and second drive currents, a first judgment part configured to judge whether the first drive current is within a first range, a second judgment part configured to judge whether the second drive current is within a second range and an abnormality detection part configured to detect a load abnormality of the first and/or second rotational members and identify a cause of the load abnormality based on results from the first and second judgment parts. | 12-26-2013 |
20140064752 | DRIVING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH SAME - A driving device includes a motor, a pulley, a metal belt, a first unit, a second unit, a biasing member and a detector. The motor includes a drive shaft. The pulley includes an output shaft extending in parallel to the drive shaft. The pulley is rotatably supported on the first unit with the output shaft as a rotary shaft and the circumferential surface is arranged at a distance from the drive shaft in a radial direction of the rotation. The second unit supports the motor and is slidable relative to the first unit. The biasing member biases the second unit in a direction to move the drive shaft away from the output shaft in a state where the metal belt is mounted between the drive shaft and the pulley. The detector detects a change in an inter-axial distance between the drive shaft and the output shaft. | 03-06-2014 |
20150043928 | ABNORMALITY MONITORING SYSTEM AND IMAGE FORMING APPARATUS - An abnormality monitoring system includes: an electronic component that outputs a lock signal of “High” when the electronic component stops functioning and outputs a lock signal of “Low” when the electronic component functions; a signal device that supplies power to the electronic component and outputs an ON operation signal instructing the electronic component to function and an OFF operation signal instructing the electronic component to stop functioning; a harness member that connects the electronic component and the signal device and transmits and receives a signal; and a monitor device that determines abnormality of the electronic component when the operation signal is ON and the lock signal is “Low”, and determines abnormality of the harness member when the operation signal is OFF and the lock signal is “Low”. | 02-12-2015 |