# US 10,246,282 B2 · Drive transmission device and image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,282 B2 - Document ID: US10246282B2 - Status: Granted - Kind: B2 - Application number: 15/508,661 - Filed: 2016-03-10 - Published: 2017-10-19 - Granted: 2019-04-02 - Earliest claimed: 2015-04-06 - Assignees: KYOCERA Document Solutions Inc. - Applicants: KYOCERA Document Solutions Inc. - Inventors: Masafumi Miki - Web page: https://patentgrep.com/patent/US10246282B2 ## CPC - B65H 3/0669: {Driving devices therefor} - B65H 1/14: comprising positively-acting mechanical devices {(B65H1/025 takes precedence)} - B65H 3/0684: {on moving support, e.g. pivoting, for bringing the roller or like rotary separator into contact with the pile} - B65H 3/5261: {Retainers of the roller type, e.g. rollers} - B65H 5/062: {between rollers or balls} - B65H 7/00: Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles - F16D 41/06: with intermediate wedging coupling members between an inner and an outer surface (F16D41/02, F16D41/24 take precedence) - F16D 48/06: Control by electric or electronic means, e.g. of fluid pressure - F16H 3/091: including a single countershaft - F16H 3/093: with two or more countershafts - F16H 3/10: with one or more one-way clutches as an essential feature - G03G 15/00: Apparatus for electrographic processes using a charge pattern (G03G16/00, G03G17/00 take precedence) - G03G 15/50: {Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control (sequencing control G03G21/14)} - G03G 15/6511: {Feeding devices for picking up or separation of copy sheets} - G03G 15/6529: {Transporting (G03G15/6555 takes precedence)} - G03G 21/1647: {Mechanical connection means} - B65H 2301/423245: the pile lying on a stationary support, i.e. the separator moving according to the decreasing height of the pile - B65H 2402/10: Modular constructions, e.g. using preformed elements or profiles - B65H 2403/72: Clutches, brakes, e.g. one-way clutch +F204 - B65H 2403/724: electromagnetic clutches - B65H 2403/82: Variable speed drive units - B65H 2405/313: with integrated handling means, e.g. separating means - B65H 2405/332: Superposed compartments - B65H 2801/06: Office-type machines, e.g. photocopiers - G03G 2215/00396: Pick-up device - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16H: GEARING - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A drive transmission device (6) includes a first drive train (62) and a second drive train (63). The first drive train (62) includes a first gear (621), a second gear (622), a rotary shaft (623), and one-way clutches (624). The second drive train (63) includes a third gear (631), a fourth gear (632), a rotary shaft (633), and an electromagnetic clutch (634). The third gear (631) engages the first gear (621) and the fourth gear (632) engages the second gear (622). A rotational speed of a pickup roller (12) is switched by switching on/off the electromagnetic clutch (634) to change a transmission path of driving force. ## Claims ### Claim 1 A drive transmission device that transmits driving force of a motor to a roller via a plurality of drive trains, the drive transmission device comprising: a controller; a first drive train including a one-way clutch; and a second drive train that is different from the first drive train and includes an electromagnetic clutch, wherein the first drive train receives the driving force from the motor and transmits the driving force to the second drive train, the second drive train transmits the driving force from the first drive train to the roller, the controller switches a rotational speed of the roller by switching on/off the electromagnetic clutch, the first drive train includes a first gear, a second gear, and a rotary shaft to which the first gear and the second gear are connected via the one-way clutch, the first gear and the second gear each have teeth on an outer circumferential surface thereof, the number of the teeth of the first gear is a first teeth number and the number of the teeth of the second gear is a second teeth number that is different from the first teeth number, the second drive train includes a third gear, a fourth gear, and a rotary shaft to which the third gear and the fourth gear are connected via the electromagnetic clutch, the third gear engages the first gear, the third gear and the fourth gear each have teeth on an outer circumferential surface thereof, and the number of the teeth of the third gear is a third teeth number and the number of the teeth of the fourth gear is a fourth teeth number that is different from the third teeth number. ### Claim 2 (depends on 1) The drive transmission device according to claim 1, wherein the one-way clutch transmits the driving force from the first gear to the rotary shaft of the first drive train only in a situation in which a rotational speed of the first gear is not less than a rotational speed of the rotary shaft of the first drive train, and transmits the driving force from the rotary shaft of the first drive train to the second gear only in a situation in which the rotational speed of the rotary shaft of the first drive train is not less than a rotational speed of the second gear. ### Claim 3 (depends on 1) The drive transmission device according to claim 1, wherein the one-way clutch transmits the driving force from the first gear to the rotary shaft of the first drive train only in a situation in which a rotational speed of the first gear rotating in a predetermined direction is not less than a rotational speed of the rotary shaft of the first drive train rotating in the predetermined direction, and transmits the driving force from the rotary shaft of the first drive train to the second gear only in a situation in which the rotational speed of the rotary shaft of the first drive train rotating in the predetermined direction is not less than a rotational speed of the second gear rotating in the predetermined direction. ### Claim 4 (depends on 1) The drive transmission device according to claim 1, wherein a drive shaft of the motor engages the first gear or the second gear, and a rotary shaft of the roller engages the third gear or the fourth gear. ### Claim 5 (depends on 1) The drive transmission device according to claim 1, wherein a drive shaft of the motor engages the first gear or the second gear, and a rotary shaft of the roller engages the third gear or the fourth gear via at least one gear. ### Claim 6 (depends on 1) The drive transmission device according to claim 1, wherein a drive shaft of the motor engages one of the first gear and the second gear, and a rotary shaft of the roller engages the other of the first gear and the second gear. ### Claim 7 (depends on 1) The drive transmission device according to claim 1, wherein a drive shaft of the motor engages one of the first gear and the second gear, and a rotary shaft of the roller engages the other of the first gear and the second gear via at least one gear. ### Claim 8 (depends on 1) The drive transmission device according to claim 1, wherein a gear ratio of the first gear to the third gear is substantially the same as a gear ratio of the fourth gear to the second gear. ### Claim 9 (depends on 1) The drive transmission device according to claim 1, wherein the fourth teeth number is substantially the same as the first teeth number, and the third teeth number is substantially the same as the second teeth number. ### Claim 10 (depends on 1) An image forming apparatus, comprising: an image forming section that forms an image on recording paper; and the drive transmission device according to claim 1. ### Claim 11 (depends on 10) The image forming apparatus according to claim 10, wherein the roller comprises at least one of a pickup roller that feeds the uppermost sheet of sheets of recording paper stacked in a paper feed cassette, a conveyance roller that conveys the recording paper, a photosensitive drum, and a fixing roller.