US20180162146A1 - Sheet conveying system and image forming system - Google Patents
Sheet conveying system and image forming system Download PDFInfo
- Publication number
- US20180162146A1 US20180162146A1 US15/815,921 US201715815921A US2018162146A1 US 20180162146 A1 US20180162146 A1 US 20180162146A1 US 201715815921 A US201715815921 A US 201715815921A US 2018162146 A1 US2018162146 A1 US 2018162146A1
- Authority
- US
- United States
- Prior art keywords
- upstream
- downstream
- paper sheet
- sheet
- conveyor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/007—Conveyor belts or like feeding devices
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
- G03G15/6561—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration
- G03G15/6564—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration with correct timing of sheet feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0045—Guides for printing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
- B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/20—Controlling associated apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/004—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet
- B65H9/006—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet the stop being formed by forwarding means in stand-by
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
- H04N1/00588—Conveying sheets before or after scanning to the scanning position
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
- H04N1/00591—Conveying sheets before or after scanning from the scanning position
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
- H04N1/00599—Using specific components
- H04N1/00602—Feed rollers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
- H04N1/00599—Using specific components
- H04N1/0061—Feed belts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0062—Removing sheets from a stack or inputting media
- H04N1/00623—Selectively inputting media from one of a plurality of input sources, e.g. input trays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/00649—Control or synchronising different handling operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/00649—Control or synchronising different handling operations
- H04N1/00652—Control of feeding speed, e.g. fast feeding to scanning position
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
- H04N1/00684—Object of the detection
- H04N1/00687—Presence or absence
- H04N1/00689—Presence
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
- H04N1/00742—Detection methods
- H04N1/00745—Detecting the leading or trailing ends of a moving sheet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
- H04N1/00763—Action taken as a result of detection
- H04N1/00774—Adjusting or controlling
- H04N1/00779—Adjusting settings, e.g. mode, feeding rate or type of paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/10—Sequence control of conveyors operating in combination
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/10—Modular constructions, e.g. using preformed elements or profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/20—Calculating means; Controlling methods
- B65H2557/25—Modular control, i.e. systems which work independently or partially dependently on other systems
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00919—Special copy medium handling apparatus
- G03G2215/00945—Copy material feeding speed varied over the feed path
Definitions
- the present invention relates to a sheet conveying system and an image forming system in which plural apparatuses are interconnected and which conveys a paper sheet.
- a technique in which a slave central processing unit (CPU) for motor control is provided in addition to a host CPU and the host CPU controls the motor via the slave CPU by, in response to a trigger command issued by the host CPU, the slave CPU rotating the motor on the basis of acceleration information stored in a built-in random access memory (RAM) has been proposed (for example, see JP 3096114 B2).
- a system in which plural apparatuses for conveying paper sheets are interconnected has a configuration in which a controller is provided in each of an upstream apparatus and a downstream apparatus, conveying rollers of the upstream apparatus are controlled by the controller of the upstream apparatus, and conveying rollers of the downstream apparatus is controlled by the controller of the downstream apparatus.
- a conveying roller of the upstream apparatus is driven by the controller of the upstream apparatus and a conveying roller of the downstream apparatus is driven by the controller of the downstream apparatus, and thus it is difficult to synchronize conveyance between these apparatuses.
- the present invention has been made in order to solve such problems, and an object of the present invention is to provide a sheet conveying system and an image forming system in which conveyance of a sheet in an upstream apparatus and conveyance of the sheet in a downstream apparatus can be synchronized in the case where the paper sheet is conveyed in a state of straddling the upstream apparatus and the downstream apparatus.
- FIG. 1 is a configuration diagram showing an example of a sheet conveying system according to an embodiment
- FIG. 2 is a flowchart showing an example of an operation of the sheet conveying system according to the embodiment
- FIGS. 3A to 3F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system according to the embodiment
- FIG. 4 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment.
- FIGS. 5A to 5F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system according to the embodiment.
- FIG. 6 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment.
- FIG. 1 is a configuration diagram showing an example of a sheet conveying system of the present embodiment.
- a sheet conveying system 1 A of the present embodiment constitutes a conveyance path between the sheet feeding apparatus 100 A and the image forming apparatus 10 A through which a paper sheet P is conveyed.
- the sheet feeding apparatus 100 A is an example of an upstream apparatus, and includes a conveyor 101 that conveys a paper sheet P and a single or plural sheet feeding trays 102 that store paper sheets P.
- the sheet feeding apparatus 100 A separates a paper sheet P from the paper sheets P stacked on the sheet feeding tray 102 by using force of air or the like, attracts the separated paper sheet P to a feeding portion such as a conveyance belt 103 , and feeds the paper sheet P to the conveyor 101 .
- the conveyor 101 of the sheet feeding apparatus 100 A is provided with plural pairs of rollers that nip and convey the paper sheet P at plural positions along a conveyance direction of the paper sheet P, and is provided with a guide plate that guides conveyance of the paper sheet P. and thus a conveyance path for the paper sheet P is formed.
- the image forming apparatus 10 A is an example of a downstream apparatus, and includes a conveyor 11 that conveys a paper sheet P, an image forming portion 12 that forms an image on the paper sheet P, a fixing portion 13 that fixes the image on the paper sheet P.
- the conveyor 11 of the image forming apparatus 10 A is provided with plural pairs of rollers that nip and convey the paper sheet P at plural positions along a conveyance direction of the paper sheet P. and is provided with a guide plate that guides conveyance of the paper sheet P. and thus a conveyance path for the paper sheet P is formed.
- the image forming portion 12 forms a toner image on an image bearing member, transfers the toner image onto an intermediate transfer member through primary transfer, and transfers the toner image transferred onto the intermediate transfer member through primary transfer onto the paper sheet P through secondary transfer. Therefore, the image forming portion 12 includes a photosensitive drum 120 which is an image bearing member, a developing device 121 , and an intermediate transfer belt 122 which is an intermediate transfer member.
- a latent image is formed by charging the surface of the photosensitive drum 120 in accordance with the image, toner is attached, by the developing device 121 , to the latent image formed on the photosensitive drum 120 , and thus the latent image is visualized as a toner image.
- the toner image formed on the photosensitive drum 120 is transferred onto the intermediate transfer belt 122 through primary transfer, and the toner image transferred onto the intermediate transfer belt 122 through primary transfer is transferred from the intermediate transfer belt 122 onto the paper sheet P through secondary transfer by a transfer portion 124 constituted by the intermediate transfer belt 122 and a transfer roller 123 .
- the fixing portion 13 is provided on a downstream side of the image forming portion 12 in the conveyance direction of the paper sheet P indicated by an arrow F, and heats and pressurizes the toner image the toner image transferred onto the paper sheet P in the image forming portion 12 to fix the toner image onto the paper sheet P.
- the sheet conveying system 1 A In the sheet conveying system 1 A, the conveying path constituted by the conveyor 101 of the sheet feeding apparatus 100 A and the conveying path constituted by the conveyor 11 of the image forming apparatus 10 A are interconnected.
- the sheet conveying system 1 A includes a first conveying roller R 1 and a second conveying roller R 2 in the conveyor 101 of the sheet feeding apparatus 100 A.
- the first conveying roller R 1 is provided on an upstream side of the second conveying roller R 2 in the conveyance direction of the paper sheet P indicated by the arrow F, and the second conveying roller R 2 serving as an upstream conveyor is provided on the most downstream side in the conveyor 101 .
- the sheet conveying system 1 A includes a third conveying roller R 3 and a fourth conveying roller R 4 in the conveyor 11 of the image forming apparatus 10 A.
- the third conveying roller R 3 serving as a downstream conveyor is provided on the most upstream side in the conveyance direction of the paper sheet P, and the fourth conveying roller R 4 is provided on a downstream side of the third conveying roller R 3 .
- the paper sheet P is conveyed by the third conveying roller R 3 , the leading end of the paper sheet S is caused to abut a nip portion constituted by an abutting portion of a pair of the fourth conveying roller R 4 , the paper sheet P is conveyed until the paper sheet P takes a warped state that is referred to as “loop”, and thus skew of the paper sheet P in a direction along the surface of the paper sheet P is corrected.
- the fourth conveying roller R 4 is rotated along the conveyance direction of the paper sheet P, and thus the paper sheet P is nipped and conveyed in a state in which the skew has been corrected. Further, by moving the fourth conveying roller R 4 in a main scanning direction, the position of the paper sheet P in the main scanning direction is corrected.
- a series of sheet position correcting operations for correcting the deviation of the position of the paper sheet P in the main scanning direction is referred to as registration swing. Therefore, the third conveying roller R 3 is also referred to as a hoop roller, and the fourth conveying roller R 4 is also referred to as a registration roller.
- the paper sheet P conveyed by the first conveying roller R 1 and the second conveying roller R 2 passes by the first conveying roller R 1 , the paper sheet P is conveyed by the second conveying roller R 2 and is output from the sheet feeding apparatus 100 A to the image forming apparatus 10 A.
- the leading end of the paper sheet P is nipped by the third conveying roller R 3 .
- a paper sheet P whose length in the conveyance direction exceeds the predetermined length is also referred to as a long paper sheet, and a paper sheet P whose length in the conveyance direction is equal to or smaller than the predetermined length is simply referred to as a paper sheet.
- the paper sheet P input from the sheet feeding apparatus 100 A to the image forming apparatus 10 A is a long paper sheet or a paper sheet
- the paper sheet P straddles the sheet feeding apparatus 100 A and the image forming apparatus 10 A, and is conveyed by the second conveying roller R 2 of the sheet feeding apparatus 100 A and the third conveying roller R 3 of the image forming apparatus 10 A.
- the decelerated long paper sheet at the time of forming a loop and conveyance thereof being stopped is conveyed by the second conveying roller R 2 of the sheet feeding apparatus 100 A and the third conveying roller R 3 of the image forming apparatus 10 A.
- the accelerated long paper sheet at the time of resuming the conveyance thereof after forming the loop is conveyed by the second conveying roller R 2 of the sheet feeding apparatus 100 A and the third conveying roller R 3 and the fourth conveying roller R 4 of the image forming apparatus 10 A.
- the decelerated paper sheet at the time of forming a loop and conveyance thereof being stopped is conveyed by the third conveying roller R 3 of the image forming apparatus 10 A.
- the accelerated paper sheet at the time of resuming the conveyance thereof after forming the loop is conveyed by the third conveying roller R 3 and the fourth conveying roller R 4 of the image forming apparatus 10 A.
- the sheet feeding apparatus 100 A includes a first motor M 1 that drives the first conveying roller R 1 and a second motor M 2 serving as an example of an upstream driver that drives the second conveying roller R 2 .
- the image forming apparatus 10 A includes a third motor M 3 serving as an example of a downstream driver that drives the third conveying roller R 3 and a fourth motor M 4 serving that drives the fourth conveying roller R 4 . Since each motor can control the rotation angle, each motor is preferably a stepping motor.
- the sheet feeding apparatus 100 A includes a first sensor Sa that detects the paper sheet P
- the image forming apparatus 10 A includes a second sensor Sb.
- the first sensor Sa is provided on a downstream side of the second conveying roller R 2 in the conveyance direction of the paper sheet P.
- the second sensor Sb is provided upstream of the fourth conveying roller R 4 and downstream of the third conveying roller R 3 in the vicinity of the fourth conveying roller R 4 in the conveyance direction of the paper sheet P.
- the image forming apparatus 10 A includes a main body controller 20 serving as an example of a downstream controller that controls the third motor M 3 , the fourth motor M 4 , and the like.
- the sheet feeding apparatus 100 A includes a sheet feeding apparatus controller 200 serving as an example of an upstream controller that controls the first motor M 1 , the second motor M 2 , and the like.
- the first motor M 1 provided in the sheet feeding apparatus 100 A is driven by the sheet feeding apparatus controller 200 .
- the second motor M 2 provided in the sheet feeding apparatus 100 A is driven by the sheet feeding apparatus controller 200 or the main body controller 20 .
- the third motor M 3 provided in the image forming apparatus 10 A is driven by the main body controller 20 or the sheet feeding apparatus controller 200 . Further, the fourth motor M 4 provided in the image forming apparatus 10 A is driven by the main body controller 20 .
- the sheet feeding apparatus controller 200 is connected to the first motor M 1 of the sheet feeding apparatus 100 A via a driving signal line S 1 , and drives the first motor M 1 .
- the sheet feeding apparatus controller 200 is connected to the second motor M 2 of the sheet feeding apparatus 100 A via a driving signal line S 2 1 serving as an example of an upstream driving signal line, and drives the second motor M 2 .
- the sheet feeding apparatus controller 200 is connected to the third motor M 3 of the image forming apparatus 10 A via a driving signal line S 3 2 serving as an example of a downstream sub-driving signal line, and directly drives the third motor M 3 not through the main body controller 20 .
- the main body controller 20 is connected to the third motor M 3 of the image forming apparatus 10 A via a driving signal line S 3 1 serving as an example of a downstream sub-driving signal line, and drives the third motor M 3 .
- the main body controller 20 is connected to the fourth motor M 4 of the image forming apparatus 10 A via a driving signal line S 4 , and drives the fourth motor M 4 .
- the main body controller 20 is connected to the second motor M 2 of the sheet feeding apparatus 100 A via a driving signal line S 2 2 serving as an example of an upstream sub-driving signal line, and directly drives the second motor M 2 not through the sheet feeding apparatus controller 200 .
- the main body controller 20 determines, on the basis of sheet information such as the size of the paper sheet P set by an operation portion 30 , whether to drive the second motor M 2 by the sheet feeding apparatus controller 200 or by the main body controller 20 . In addition, the main body controller 20 determines whether to drive the third motor M 3 by the sheet feeding apparatus controller 200 or by the main body controller 20 .
- the main body controller 20 determines a timing for switching the drive of the third conveying roller R 3 from by the main body controller 20 to by the sheet feeding apparatus controller 200 .
- the main body controller 20 determines a timing for switching the drive of the second conveying roller R 2 from by the sheet feeding apparatus controller 200 to by the main body controller 20 and a timing for switching the drive of the second conveying roller R 2 from by the main body controller 20 to by the sheet feeding apparatus controller 200 .
- the main body controller 20 is connected to the sheet feeding apparatus controller 200 via a control signal line Sc.
- the main body controller 20 outputs a control signal for causing the sheet feeding apparatus controller 200 to drive the first motor M 1 and the second motor M 2 to the sheet feeding apparatus controller 200 through the control signal line Sc.
- the sheet feeding apparatus controller 200 In the case where the second motor M 2 is driven by the sheet feeding apparatus controller 200 and the third motor M 3 is driven by the main body controller 20 , the sheet feeding apparatus controller 200 outputs a driving signal for driving the first motor M 1 to the first motor M 1 through the driving signal line S 1 , and thus drives the first motor M 1 . In addition, the sheet feeding apparatus controller 200 outputs a driving signal for driving the second motor M 2 to the second motor M 2 through the driving signal line S 2 1 , and thus drives the second motor M 2 .
- the main body controller 20 outputs a driving signal for driving the third motor M 3 to the third motor M 3 through the driving signal line S 3 1 , and thus drives the third motor M 3 .
- the main body controller 20 outputs a driving signal for driving the fourth motor M 4 to the fourth motor M 4 through the driving signal line S 4 , and thus drives the fourth motor M 4 .
- the sheet feeding apparatus controller 200 does not output a driving signal for driving the third motor M 3 .
- the main body controller 20 does not output a driving signal for driving the second motor M 2 .
- the main body controller 20 In the case where the main body controller 20 has determined that the sheet feeding apparatus controller 200 drives the second motor M 2 and the third motor M 3 , the main body controller 20 outputs a control signal for causing the sheet feeding apparatus controller 200 to drive the first motor M 1 , the second motor M 2 , and the third motor M 3 to the sheet feeding apparatus controller 200 through the control signal line Sc.
- the sheet feeding apparatus controller 200 In the case where the second motor M 2 and the third motor M 3 are driven by the sheet feeding apparatus controller 200 , the sheet feeding apparatus controller 200 outputs a driving signal for driving the first motor M 1 to the first motor M 1 through the driving signal line S 1 , and thus drives the first motor M 1 . In addition, the sheet feeding apparatus controller 200 outputs a driving signal for driving the second motor M 2 to the second motor M 2 through the driving signal line S 2 1 , and thus drives the second motor M 2 . Further, the sheet feeding apparatus controller 200 outputs a driving signal for driving the third motor M 3 to the third motor M 3 through the driving signal line S 3 2 , and thus drives the third motor M 3 .
- the main body controller 20 outputs a driving signal for driving the fourth motor M 4 to the fourth motor M 4 through the driving signal line S 4 , and thus drives the fourth motor M 4 .
- the main body controller 20 does not output a driving signal for driving the third motor M 3 .
- the main body controller 20 does not output a driving signal for driving the second motor M 2 .
- the main body controller 20 In the case where the main body controller 20 has determined that the main body controller 20 drives the second motor M 2 and the third motor M 3 , the main body controller 20 outputs a control signal for causing the sheet feeding apparatus controller 200 to drive the first motor M 1 and to not drive the second motor M 2 to the sheet feeding apparatus controller 200 through the control signal line Sc.
- the sheet feeding apparatus controller 200 outputs a driving signal for driving the first motor M 1 to the first motor M 1 through the driving signal line S 1 , and thus drives the first motor M 1 .
- the sheet feeding apparatus controller 200 does not output a driving signal for driving the second motor M 2 .
- the sheet feeding apparatus controller 200 does not output a driving signal for driving the third motor M 3 .
- the main body controller 20 outputs a driving signal for driving the second motor M 2 to the second motor M 2 through the driving signal line S 2 2 , and thus drives the second motor M 2 .
- the main body controller 20 outputs a driving signal for driving the third motor M 3 to the third motor M 3 through the driving signal line S 3 1 , and thus drives the third motor M 3 .
- the main body controller 20 outputs a driving signal for driving the fourth motor M 4 to the fourth motor M 4 through the driving signal line S 4 , and thus drives the fourth motor M 4 .
- FIG. 2 is a flowchart showing an example of an operation of the sheet conveying system of the present embodiment
- FIGS. 3A to 3F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system of the present embodiment
- FIG. 4 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment.
- the main body controller 20 switches the drive of the third conveying roller R 3 to be performed under the control of the sheet feeding apparatus controller 200 at a predetermined timing, and thus synchronizes the first conveying roller R 1 , the second conveying roller R 2 , and the third conveying roller R 3 .
- the main body controller 20 switches the drive of the second conveying roller R 2 to be performed under the control of the main body controller 20 at a predetermined timing, and thus synchronizes the second conveying roller R 2 , the third conveying roller R 3 , and the fourth conveying roller R 4 .
- step SA 1 of FIG. 2 and FIG. 3A the first motor M 1 that drives the first conveying roller R 1 and the second motor M 2 that drives the second conveying roller R 2 are controlled by the sheet feeding apparatus controller 200 shown in FIG. 1 .
- the third motor M 3 that drives the third conveying roller R 3 and the fourth motor M 4 that drives the fourth conveying roller R 4 are controlled by the main body controller 20 .
- the sheet feeding apparatus controller 200 controls the first motor M to drive the first conveying roller R 1 and controls the second motor M 2 to drive the second conveying roller R 2 , and thus the long paper sheet P 1 is conveyed.
- the third conveying roller R 3 and the fourth conveying roller R 4 are stopped.
- the drive of the third conveying roller R 3 is switched to be performed under the control of the sheet feeding apparatus controller 200 in step SA 3 of FIG. 2 .
- the switching of conveying rollers controlled by the controlled by the main body controller 20 and the sheet feeding apparatus controller 200 is performed while the conveying rollers to be switched are stopped, there is no influence such as fluctuation of the rotational speed of the conveying rollers.
- the sheet feeding apparatus controller 200 controls the drive of the first conveying roller R 1 , the second conveying roller R 2 , and the third conveying roller R 3
- the main body controller 20 controls the drive of the fourth conveying roller R 4
- the sheet feeding apparatus controller 200 directly controls the drive of the third conveying roller R 3 through the driving signal line S 3 2 shown in FIG. 1 , and thus the third conveying roller R 3 is driven in synchronization with the first conveying roller R 1 and the second conveying roller R 2 to convey the long paper sheet P 1 .
- the fourth conveying roller R 4 is stopped.
- the drive of the first conveying roller R 1 is stopped.
- deceleration of the second conveying roller R 2 and the third conveying roller R 3 is started, and the drive thereof is stopped.
- the long paper sheet P 1 is conveyed by a predetermined amount by the second conveying roller R 2 and the third conveying roller R 3 with the fourth conveying roller R 4 stopped, the leading end of the long paper sheet P 1 is caused to abut a nip portion constituted by an abutting portion of a pair of the fourth conveying roller R 4 , and thus a loop of the long paper sheet P 1 is formed between the third conveying roller R 3 and the fourth conveying roller R 4 as shown in FIG. 3C .
- the decelerated long paper sheet P 1 at the time of forming a loop and conveyance thereof being stopped is conveyed by the second conveying roller R 2 of the sheet feeding apparatus 100 A and the third conveying roller R 3 of the image forming apparatus 10 A.
- the conveyance thereof is stopped while the long paper sheet P 1 is straddling the sheet feeding apparatus 100 A and the image forming apparatus 10 A.
- the third conveying roller R 3 of the image forming apparatus 10 A being controlled by the sheet feeding apparatus controller 200 , the timings of deceleration and stop of the second conveying roller R 2 and the third conveying roller R 3 are synchronized. As a result of this, pulling and loosening of the long paper sheet P 1 are suppressed.
- the sheet feeding apparatus controller 200 controls the drive of the first conveying roller R 1
- the main body controller 20 controls the drive of the second conveying roller R 2 , the third conveying roller R 3 , and the fourth conveying roller R 4 .
- the main body controller 20 controls the drive of the third conveying roller R 3 through the driving signal line S 3 1 shown in FIG. 1 , and directly controls the drive of the second conveying roller R 2 through the driving signal line S 2 2 shown in FIG. 1 , and thus the second conveying roller R 2 is driven in synchronization with the third conveying roller R 3 and the fourth conveying roller R 4 to resume the conveyance of the long paper sheet P 1 .
- the first conveying roller R 1 is stopped.
- the accelerated long paper sheet P 1 at the time of resuming the conveyance thereof after forming the loop is conveyed by the second conveying roller R 2 of the sheet feeding apparatus 100 A and the third conveying roller R 3 and the fourth conveying roller R 4 of the image forming apparatus 10 A.
- the conveyance thereof is resumed from the state in which the long paper sheet P 1 is straddling the sheet feeding apparatus 100 A and the image forming apparatus 10 A.
- the second conveying roller R 2 of the sheet feeding apparatus 100 A being controlled by the main body controller 20 , the timings of acceleration of the second conveying roller R 2 , the third conveying roller R 3 , and the fourth conveying roller R 4 are synchronized. As a result of this, pulling and loosening of the long paper sheet P 1 are suppressed.
- step SA 6 of FIG. 2 when the leading end of the long paper sheet P 1 having passed by the first sensor Sa is detected, the drive of the second conveying roller R 2 is stopped, and the drive of the second conveying roller R 2 is switched to be performed under the control of the sheet feeding apparatus controller 200 in step SA 7 of FIG. 2 .
- the sheet feeding apparatus controller 200 controls the drive of the first conveying roller R 1 and the second conveying roller R 2
- the main body controller 20 controls the drive of the third conveying roller R 3 and the fourth conveying roller R 4 .
- FIGS. 5A to 5F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system of the present embodiment
- FIG. 6 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment.
- the sheet feeding apparatus controller 200 controls the drive of the first conveying roller R 1 and the second conveying roller R 2
- the main body controller 20 controls the drive of the third conveying roller R 3 and the fourth conveying roller R 4 in FIG. 5A .
- the first conveying roller R 1 and the second conveying roller R 2 are driven to convey the paper sheet P 2 .
- the third conveying roller R 3 and the fourth conveying roller R 4 are stopped.
- the third conveying roller R 3 is driven. Since the second conveying roller R 2 and the third conveying roller R 3 need only be synchronized before the leading end of the paper sheet P 2 conveyed by the second conveying roller R 2 reaches the third conveying roller R 3 , the paper sheet P 2 is not pulled or loosened even in the case where the second conveying roller R 2 is controlled by the sheet feeding apparatus controller 200 and the third conveying roller R 3 is controlled by the main body controller 20 . In the state of FIG. 5B , the fourth conveying roller R 4 is stopped.
- the drive of the first conveying roller R 1 is stopped.
- the drive of the second conveying roller R 2 is stopped. Further, in the case where the paper sheet P 2 is detected by the second sensor Sb, deceleration of the third conveying roller R 3 is started, and the drive thereof is stopped.
- the paper sheet P 2 is conveyed by a predetermined amount by the third conveying roller R 3 with the fourth conveying roller R 4 stopped, the leading end of the paper sheet P 2 is caused to abut a nip portion constituted by an abutting portion of a pair of the fourth conveying roller R 4 , and thus a loop of the paper sheet P 2 is formed between the third conveying roller R 3 and the fourth conveying roller R 4 as shown in FIG. 5C .
- the trailing end of the decelerated paper sheet P 2 at the time of forming a loop and conveyance thereof being stopped has passed by the second conveying roller R 2 , and the paper sheet P 2 is conveyed by the third conveying roller R 3 of the image forming apparatus 10 A. Therefore, there is no need to synchronize the second conveying roller R 2 of the sheet feeding apparatus 100 A with the third conveying roller R 3 of the image forming apparatus 10 A.
- the third conveying roller R 3 and the fourth conveying roller R 4 are driven to resume the conveyance of the paper sheet P 2 in FIG. 5D .
- the first conveying roller R 1 and the second conveying roller R 2 are stopped.
- the accelerated paper sheet P 2 at the time of resuming the conveyance thereof after forming the loop is conveyed by the third conveying roller R 3 and the fourth conveying roller R 4 of the image forming apparatus 10 A as shown in FIG. 5E . Therefore, there is no need to synchronize the second conveying roller R 2 of the sheet feeding apparatus 100 A with the third conveying roller R 3 of the image forming apparatus 10 A.
- the present invention may be applied to an image forming system in which a long paper sheet of a length large enough to stop in a state of straddling devices in the middle of processing is conveyed.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Control Of Multiple Motors (AREA)
- Handling Of Sheets (AREA)
- Paper Feeding For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
- The entire disclosure of Japanese patent Application No. 2016-242684, filed on Dec. 14, 2016, is incorporated herein by reference in its entirety.
- The present invention relates to a sheet conveying system and an image forming system in which plural apparatuses are interconnected and which conveys a paper sheet.
- As a configuration in which a paper sheet is conveyed by driving a conveying roller by a motor, a technique in which a slave central processing unit (CPU) for motor control is provided in addition to a host CPU and the host CPU controls the motor via the slave CPU by, in response to a trigger command issued by the host CPU, the slave CPU rotating the motor on the basis of acceleration information stored in a built-in random access memory (RAM) has been proposed (for example, see JP 3096114 B2).
- In addition, a technique in which a CPU that outputs a motor control command outputs motor selection information together with the motor control command, a CPU interface simultaneously outputs motor control commands to plural pulse generation portions selected in accordance with the motor selection information, and thus plural motors are controlled simultaneously has been proposed (for example, see JP 4221652 B2).
- Meanwhile, a system in which plural apparatuses for conveying paper sheets are interconnected has a configuration in which a controller is provided in each of an upstream apparatus and a downstream apparatus, conveying rollers of the upstream apparatus are controlled by the controller of the upstream apparatus, and conveying rollers of the downstream apparatus is controlled by the controller of the downstream apparatus.
- In a system in which plural apparatuses for conveying paper sheets are interconnected, in the case of stopping a paper sheet in a state of straddling the upstream apparatus and the downstream apparatus or resuming conveyance of the paper sheet stopped in the state of straddling the upstream apparatus and the downstream apparatus, a conveying roller of the upstream apparatus is driven by the controller of the upstream apparatus and a conveying roller of the downstream apparatus is driven by the controller of the downstream apparatus, and thus it is difficult to synchronize conveyance between these apparatuses.
- Also, if the controller of one of the upstream apparatus and the downstream apparatus drives the conveying rollers via the controller of the other apparatus, a delay occurs and it is difficult to achieve the synchronization.
- The present invention has been made in order to solve such problems, and an object of the present invention is to provide a sheet conveying system and an image forming system in which conveyance of a sheet in an upstream apparatus and conveyance of the sheet in a downstream apparatus can be synchronized in the case where the paper sheet is conveyed in a state of straddling the upstream apparatus and the downstream apparatus.
- To achieve the abovementioned object, according to an aspect of the present invention, a sheet conveying system reflecting one aspect of the present invention comprises: an upstream apparatus provided on an upstream side in a conveyance direction of a paper sheet; a downstream apparatus provided on a downstream side of the upstream apparatus in the conveyance direction of the paper sheet; an upstream conveyor that is provided in the upstream apparatus and conveys the paper sheet; an upstream driver that is provided in the upstream apparatus and drives the upstream conveyor, a downstream conveyor that is provided in the downstream apparatus, receives the paper sheet conveyed from the upstream conveyor, and conveys the paper sheet received from the upstream conveyor, a downstream driver that is provided in the downstream apparatus and drives the downstream conveyor, an upstream controller that is provided in the upstream apparatus, connected to the upstream driver via an upstream driving signal line, and connected to the downstream driver via a downstream sub-driving signal line; and a downstream controller that is provided in the downstream apparatus, connected to the downstream driver via a downstream driving signal line, and connected to the upstream driver via an upstream sub-driving signal line, wherein the sheet conveying system switches control on the basis of sheet information between first control in which the upstream controller controls the upstream driver via the upstream driving signal line and the downstream driver via the downstream sub-driving signal line and second control in which the downstream controller controls the downstream driver via the downstream driving signal line and the upstream driver via the upstream sub-driving signal line.
- The advantages and features provided by one or more embodiments of the invention will become more fully understood from the detailed description given hereinbelow and the appended drawings which are given by way of illustration only, and thus are not intended as a definition of the limits of the present invention:
-
FIG. 1 is a configuration diagram showing an example of a sheet conveying system according to an embodiment; -
FIG. 2 is a flowchart showing an example of an operation of the sheet conveying system according to the embodiment; -
FIGS. 3A to 3F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system according to the embodiment; -
FIG. 4 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment; -
FIGS. 5A to 5F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system according to the embodiment; and -
FIG. 6 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment. - Hereinafter, one or more embodiments of a sheet conveying system and an image forming system according to the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the disclosed embodiments.
-
FIG. 1 is a configuration diagram showing an example of a sheet conveying system of the present embodiment. In this example, in animage forming system 110A including asheet feeding apparatus 100A, animage forming apparatus 10A, a finishing apparatus that is not illustrated, and so forth, a sheet conveying system 1A of the present embodiment constitutes a conveyance path between thesheet feeding apparatus 100A and theimage forming apparatus 10A through which a paper sheet P is conveyed. - The
sheet feeding apparatus 100A is an example of an upstream apparatus, and includes aconveyor 101 that conveys a paper sheet P and a single or pluralsheet feeding trays 102 that store paper sheets P. Thesheet feeding apparatus 100A separates a paper sheet P from the paper sheets P stacked on thesheet feeding tray 102 by using force of air or the like, attracts the separated paper sheet P to a feeding portion such as aconveyance belt 103, and feeds the paper sheet P to theconveyor 101. - The
conveyor 101 of thesheet feeding apparatus 100A is provided with plural pairs of rollers that nip and convey the paper sheet P at plural positions along a conveyance direction of the paper sheet P, and is provided with a guide plate that guides conveyance of the paper sheet P. and thus a conveyance path for the paper sheet P is formed. - The
image forming apparatus 10A is an example of a downstream apparatus, and includes aconveyor 11 that conveys a paper sheet P, animage forming portion 12 that forms an image on the paper sheet P, afixing portion 13 that fixes the image on the paper sheet P. Theconveyor 11 of theimage forming apparatus 10A is provided with plural pairs of rollers that nip and convey the paper sheet P at plural positions along a conveyance direction of the paper sheet P. and is provided with a guide plate that guides conveyance of the paper sheet P. and thus a conveyance path for the paper sheet P is formed. - In this example, the
image forming portion 12 forms a toner image on an image bearing member, transfers the toner image onto an intermediate transfer member through primary transfer, and transfers the toner image transferred onto the intermediate transfer member through primary transfer onto the paper sheet P through secondary transfer. Therefore, theimage forming portion 12 includes aphotosensitive drum 120 which is an image bearing member, a developingdevice 121, and anintermediate transfer belt 122 which is an intermediate transfer member. - In the
image forming portion 12, a latent image is formed by charging the surface of thephotosensitive drum 120 in accordance with the image, toner is attached, by the developingdevice 121, to the latent image formed on thephotosensitive drum 120, and thus the latent image is visualized as a toner image. In theimage forming portion 12, the toner image formed on thephotosensitive drum 120 is transferred onto theintermediate transfer belt 122 through primary transfer, and the toner image transferred onto theintermediate transfer belt 122 through primary transfer is transferred from theintermediate transfer belt 122 onto the paper sheet P through secondary transfer by atransfer portion 124 constituted by theintermediate transfer belt 122 and atransfer roller 123. - The
fixing portion 13 is provided on a downstream side of theimage forming portion 12 in the conveyance direction of the paper sheet P indicated by an arrow F, and heats and pressurizes the toner image the toner image transferred onto the paper sheet P in theimage forming portion 12 to fix the toner image onto the paper sheet P. - In the sheet conveying system 1A, the conveying path constituted by the
conveyor 101 of thesheet feeding apparatus 100A and the conveying path constituted by theconveyor 11 of theimage forming apparatus 10A are interconnected. The sheet conveying system 1A includes a first conveying roller R1 and a second conveying roller R2 in theconveyor 101 of thesheet feeding apparatus 100A. - In the
conveyor 101 of thesheet feeding apparatus 100A, the first conveying roller R1 is provided on an upstream side of the second conveying roller R2 in the conveyance direction of the paper sheet P indicated by the arrow F, and the second conveying roller R2 serving as an upstream conveyor is provided on the most downstream side in theconveyor 101. - In addition, the sheet conveying system 1A includes a third conveying roller R3 and a fourth conveying roller R4 in the
conveyor 11 of theimage forming apparatus 10A. In theconveyor 11 of theimage forming apparatus 10A, the third conveying roller R3 serving as a downstream conveyor is provided on the most upstream side in the conveyance direction of the paper sheet P, and the fourth conveying roller R4 is provided on a downstream side of the third conveying roller R3. - In the
image forming apparatus 10A, in a state in which the fourth conveying roller R4 is stopped, the paper sheet P is conveyed by the third conveying roller R3, the leading end of the paper sheet S is caused to abut a nip portion constituted by an abutting portion of a pair of the fourth conveying roller R4, the paper sheet P is conveyed until the paper sheet P takes a warped state that is referred to as “loop”, and thus skew of the paper sheet P in a direction along the surface of the paper sheet P is corrected. - Further, in the
image forming apparatus 10A, after correcting the skew of the paper sheet P, the fourth conveying roller R4 is rotated along the conveyance direction of the paper sheet P, and thus the paper sheet P is nipped and conveyed in a state in which the skew has been corrected. Further, by moving the fourth conveying roller R4 in a main scanning direction, the position of the paper sheet P in the main scanning direction is corrected. As described above, a series of sheet position correcting operations for correcting the deviation of the position of the paper sheet P in the main scanning direction is referred to as registration swing. Therefore, the third conveying roller R3 is also referred to as a hoop roller, and the fourth conveying roller R4 is also referred to as a registration roller. - In the sheet conveying system 1A, when the trailing end of the paper sheet P conveyed by the first conveying roller R1 and the second conveying roller R2 passes by the first conveying roller R1, the paper sheet P is conveyed by the second conveying roller R2 and is output from the
sheet feeding apparatus 100A to theimage forming apparatus 10A. - In the sheet conveying system 1A, before the trailing end of the paper sheet P conveyed by the second conveying roller R2 passes by the second conveying roller R2, the leading end of the paper sheet P is nipped by the third conveying roller R3.
- In addition, in the sheet conveying system 1A, when the length of the paper sheet P in the conveyance direction exceeds a predetermined length, before the trailing end of the paper sheet P passes by the second conveying roller R2, the leading end of the paper sheet P reaches the fourth conveying roller R4 and a loop is formed.
- Further, when the length of the paper sheet P in the conveyance direction is equal to or smaller than the predetermined length, after the trailing end of the paper sheet P passes by the second conveying roller R2, the leading end of the paper sheet P reaches the fourth conveying roller R4 and a loop is formed. A paper sheet P whose length in the conveyance direction exceeds the predetermined length is also referred to as a long paper sheet, and a paper sheet P whose length in the conveyance direction is equal to or smaller than the predetermined length is simply referred to as a paper sheet.
- As a result, in the sheet conveying system 1A, in either case where the paper sheet P input from the
sheet feeding apparatus 100A to theimage forming apparatus 10A is a long paper sheet or a paper sheet, the paper sheet P straddles thesheet feeding apparatus 100A and theimage forming apparatus 10A, and is conveyed by the second conveying roller R2 of thesheet feeding apparatus 100A and the third conveying roller R3 of theimage forming apparatus 10A. - When the paper sheet P conveyed by the second conveying roller R2 and the third conveying roller R3 across the
sheet feeding apparatus 100A and theimage forming apparatus 10A is a long paper sheet, the leading end of the long paper sheet reaches the fourth conveying roller R4 of theimage forming apparatus 10A before the trailing end of the long paper sheet passes by the second conveying roller R2, and thus a loop is formed. - As a result, the decelerated long paper sheet at the time of forming a loop and conveyance thereof being stopped is conveyed by the second conveying roller R2 of the
sheet feeding apparatus 100A and the third conveying roller R3 of theimage forming apparatus 10A. In addition, the accelerated long paper sheet at the time of resuming the conveyance thereof after forming the loop is conveyed by the second conveying roller R2 of thesheet feeding apparatus 100A and the third conveying roller R3 and the fourth conveying roller R4 of theimage forming apparatus 10A. - Meanwhile, when the paper sheet P conveyed by the second conveying roller R2 and the third conveying roller R3 across the
sheet feeding apparatus 100A and theimage forming apparatus 10A is a paper sheet, the leading end of the paper sheet P reaches the fourth conveying roller R4 after the trailing end of the paper sheet P passes by the second conveying roller R2, and thus a loop is formed. - As a result, the decelerated paper sheet at the time of forming a loop and conveyance thereof being stopped is conveyed by the third conveying roller R3 of the
image forming apparatus 10A. In addition, the accelerated paper sheet at the time of resuming the conveyance thereof after forming the loop is conveyed by the third conveying roller R3 and the fourth conveying roller R4 of theimage forming apparatus 10A. - In the sheet conveying system 1A, the
sheet feeding apparatus 100A includes a first motor M1 that drives the first conveying roller R1 and a second motor M2 serving as an example of an upstream driver that drives the second conveying roller R2. In addition, in the sheet conveying system 1A, theimage forming apparatus 10A includes a third motor M3 serving as an example of a downstream driver that drives the third conveying roller R3 and a fourth motor M4 serving that drives the fourth conveying roller R4. Since each motor can control the rotation angle, each motor is preferably a stepping motor. - Further, in the sheet conveying system 1A, the
sheet feeding apparatus 100A includes a first sensor Sa that detects the paper sheet P, and theimage forming apparatus 10A includes a second sensor Sb. The first sensor Sa is provided on a downstream side of the second conveying roller R2 in the conveyance direction of the paper sheet P. The second sensor Sb is provided upstream of the fourth conveying roller R4 and downstream of the third conveying roller R3 in the vicinity of the fourth conveying roller R4 in the conveyance direction of the paper sheet P. - The
image forming apparatus 10A includes amain body controller 20 serving as an example of a downstream controller that controls the third motor M3, the fourth motor M4, and the like. In addition thesheet feeding apparatus 100A includes a sheetfeeding apparatus controller 200 serving as an example of an upstream controller that controls the first motor M1, the second motor M2, and the like. - In the sheet conveying system 1A, the first motor M1 provided in the
sheet feeding apparatus 100A is driven by the sheetfeeding apparatus controller 200. In addition, the second motor M2 provided in thesheet feeding apparatus 100A is driven by the sheetfeeding apparatus controller 200 or themain body controller 20. - The third motor M3 provided in the
image forming apparatus 10A is driven by themain body controller 20 or the sheetfeeding apparatus controller 200. Further, the fourth motor M4 provided in theimage forming apparatus 10A is driven by themain body controller 20. - Therefore, the sheet
feeding apparatus controller 200 is connected to the first motor M1 of thesheet feeding apparatus 100A via a driving signal line S1, and drives the first motor M1. In addition, the sheetfeeding apparatus controller 200 is connected to the second motor M2 of thesheet feeding apparatus 100A via a driving signal line S2 1 serving as an example of an upstream driving signal line, and drives the second motor M2. Further, the sheetfeeding apparatus controller 200 is connected to the third motor M3 of theimage forming apparatus 10A via a driving signal line S3 2 serving as an example of a downstream sub-driving signal line, and directly drives the third motor M3 not through themain body controller 20. - The
main body controller 20 is connected to the third motor M3 of theimage forming apparatus 10A via a driving signal line S3 1 serving as an example of a downstream sub-driving signal line, and drives the third motor M3. In addition, themain body controller 20 is connected to the fourth motor M4 of theimage forming apparatus 10A via a driving signal line S4, and drives the fourth motor M4. Further, themain body controller 20 is connected to the second motor M2 of thesheet feeding apparatus 100A via a driving signal line S2 2 serving as an example of an upstream sub-driving signal line, and directly drives the second motor M2 not through the sheetfeeding apparatus controller 200. - The
main body controller 20 determines, on the basis of sheet information such as the size of the paper sheet P set by anoperation portion 30, whether to drive the second motor M2 by the sheetfeeding apparatus controller 200 or by themain body controller 20. In addition, themain body controller 20 determines whether to drive the third motor M3 by the sheetfeeding apparatus controller 200 or by themain body controller 20. - Further, on the basis of the position of the paper sheet P conveyed in the
sheet feeding apparatus 100A and detected by the first sensor Sa, themain body controller 20 determines a timing for switching the drive of the third conveying roller R3 from by themain body controller 20 to by the sheetfeeding apparatus controller 200. In addition, on the basis of the position of the paper sheet P conveyed in theimage forming apparatus 10A and detected by the second sensor Sb, themain body controller 20 determines a timing for switching the drive of the second conveying roller R2 from by the sheetfeeding apparatus controller 200 to by themain body controller 20 and a timing for switching the drive of the second conveying roller R2 from by themain body controller 20 to by the sheetfeeding apparatus controller 200. - The
main body controller 20 is connected to the sheetfeeding apparatus controller 200 via a control signal line Sc. In the case where themain body controller 20 has determined that the sheetfeeding apparatus controller 200 drives the second motor M2 and themain body controller 20 drives the third motor M3, themain body controller 20 outputs a control signal for causing the sheetfeeding apparatus controller 200 to drive the first motor M1 and the second motor M2 to the sheetfeeding apparatus controller 200 through the control signal line Sc. - In the case where the second motor M2 is driven by the sheet
feeding apparatus controller 200 and the third motor M3 is driven by themain body controller 20, the sheetfeeding apparatus controller 200 outputs a driving signal for driving the first motor M1 to the first motor M1 through the driving signal line S1, and thus drives the first motor M1. In addition, the sheetfeeding apparatus controller 200 outputs a driving signal for driving the second motor M2 to the second motor M2 through the driving signal line S2 1, and thus drives the second motor M2. - The
main body controller 20 outputs a driving signal for driving the third motor M3 to the third motor M3 through the driving signal line S3 1, and thus drives the third motor M3. In addition, themain body controller 20 outputs a driving signal for driving the fourth motor M4 to the fourth motor M4 through the driving signal line S4, and thus drives the fourth motor M4. The sheetfeeding apparatus controller 200 does not output a driving signal for driving the third motor M3. In addition, themain body controller 20 does not output a driving signal for driving the second motor M2. - In the case where the
main body controller 20 has determined that the sheetfeeding apparatus controller 200 drives the second motor M2 and the third motor M3, themain body controller 20 outputs a control signal for causing the sheetfeeding apparatus controller 200 to drive the first motor M1, the second motor M2, and the third motor M3 to the sheetfeeding apparatus controller 200 through the control signal line Sc. - In the case where the second motor M2 and the third motor M3 are driven by the sheet
feeding apparatus controller 200, the sheetfeeding apparatus controller 200 outputs a driving signal for driving the first motor M1 to the first motor M1 through the driving signal line S1, and thus drives the first motor M1. In addition, the sheetfeeding apparatus controller 200 outputs a driving signal for driving the second motor M2 to the second motor M2 through the driving signal line S2 1, and thus drives the second motor M2. Further, the sheetfeeding apparatus controller 200 outputs a driving signal for driving the third motor M3 to the third motor M3 through the driving signal line S3 2, and thus drives the third motor M3. - The
main body controller 20 outputs a driving signal for driving the fourth motor M4 to the fourth motor M4 through the driving signal line S4, and thus drives the fourth motor M4. Themain body controller 20 does not output a driving signal for driving the third motor M3. In addition, themain body controller 20 does not output a driving signal for driving the second motor M2. - In the case where the
main body controller 20 has determined that themain body controller 20 drives the second motor M2 and the third motor M3, themain body controller 20 outputs a control signal for causing the sheetfeeding apparatus controller 200 to drive the first motor M1 and to not drive the second motor M2 to the sheetfeeding apparatus controller 200 through the control signal line Sc. - In the case where the second motor M2 and the third motor M3 are driven by the
main body controller 20, the sheetfeeding apparatus controller 200 outputs a driving signal for driving the first motor M1 to the first motor M1 through the driving signal line S1, and thus drives the first motor M1. The sheetfeeding apparatus controller 200 does not output a driving signal for driving the second motor M2. In addition, the sheetfeeding apparatus controller 200 does not output a driving signal for driving the third motor M3. - The
main body controller 20 outputs a driving signal for driving the second motor M2 to the second motor M2 through the driving signal line S2 2, and thus drives the second motor M2. In addition, themain body controller 20 outputs a driving signal for driving the third motor M3 to the third motor M3 through the driving signal line S3 1, and thus drives the third motor M3. Further, themain body controller 20 outputs a driving signal for driving the fourth motor M4 to the fourth motor M4 through the driving signal line S4, and thus drives the fourth motor M4. - <Exemplary Operation of Sheet Conveying System and Image Forming System of Present Embodiment>
-
FIG. 2 is a flowchart showing an example of an operation of the sheet conveying system of the present embodiment,FIGS. 3A to 3F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system of the present embodiment, andFIG. 4 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment. - First, the processing in the case of conveying a long paper sheet as the paper sheet P will be described with reference to corresponding drawings. In the case where the
main body controller 20 has determined that the paper sheet P is a long paper sheet P1 on the basis of sheet information such as the size of the paper sheet P set via theoperation portion 30, themain body controller 20 switches the drive of the third conveying roller R3 to be performed under the control of the sheetfeeding apparatus controller 200 at a predetermined timing, and thus synchronizes the first conveying roller R1, the second conveying roller R2, and the third conveying roller R3. In addition, themain body controller 20 switches the drive of the second conveying roller R2 to be performed under the control of themain body controller 20 at a predetermined timing, and thus synchronizes the second conveying roller R2, the third conveying roller R3, and the fourth conveying roller R4. - That is, in step SA1 of
FIG. 2 andFIG. 3A , the first motor M1 that drives the first conveying roller R1 and the second motor M2 that drives the second conveying roller R2 are controlled by the sheetfeeding apparatus controller 200 shown inFIG. 1 . In addition, the third motor M3 that drives the third conveying roller R3 and the fourth motor M4 that drives the fourth conveying roller R4 are controlled by themain body controller 20. - As described above, the sheet
feeding apparatus controller 200 controls the first motor M to drive the first conveying roller R1 and controls the second motor M2 to drive the second conveying roller R2, and thus the long paper sheet P1 is conveyed. As shown inFIG. 4 , in the state ofFIG. 3A , the third conveying roller R3 and the fourth conveying roller R4 are stopped. - As shown in
FIG. 3B , when the leading end of the long paper sheet P1 is conveyed to a position where the leading end of the long paper sheet P1 passes by the first sensor Sa and the long paper sheet P1 is detected by the first sensor Sa in step SA2 ofFIG. 2 , the drive of the third conveying roller R3 is switched to be performed under the control of the sheetfeeding apparatus controller 200 in step SA3 ofFIG. 2 . In the case where the switching of conveying rollers controlled by the controlled by themain body controller 20 and the sheetfeeding apparatus controller 200 is performed while the conveying rollers to be switched are stopped, there is no influence such as fluctuation of the rotational speed of the conveying rollers. - Accordingly, the sheet
feeding apparatus controller 200 controls the drive of the first conveying roller R1, the second conveying roller R2, and the third conveying roller R3, and themain body controller 20 controls the drive of the fourth conveying roller R4. The sheetfeeding apparatus controller 200 directly controls the drive of the third conveying roller R3 through the driving signal line S3 2 shown inFIG. 1 , and thus the third conveying roller R3 is driven in synchronization with the first conveying roller R1 and the second conveying roller R2 to convey the long paper sheet P1. In the state ofFIG. 3B , the fourth conveying roller R4 is stopped. - After the trailing end of the long paper sheet P1 has passed by the first conveying roller R1, the drive of the first conveying roller R1 is stopped. In addition, in the case where the long paper sheet P1 is detected by the second sensor Sb in step SA4 of
FIG. 2 , deceleration of the second conveying roller R2 and the third conveying roller R3 is started, and the drive thereof is stopped. - As described above, the long paper sheet P1 is conveyed by a predetermined amount by the second conveying roller R2 and the third conveying roller R3 with the fourth conveying roller R4 stopped, the leading end of the long paper sheet P1 is caused to abut a nip portion constituted by an abutting portion of a pair of the fourth conveying roller R4, and thus a loop of the long paper sheet P1 is formed between the third conveying roller R3 and the fourth conveying roller R4 as shown in
FIG. 3C . - The decelerated long paper sheet P1 at the time of forming a loop and conveyance thereof being stopped is conveyed by the second conveying roller R2 of the
sheet feeding apparatus 100A and the third conveying roller R3 of theimage forming apparatus 10A. In the case of the long paper sheet P1, the conveyance thereof is stopped while the long paper sheet P1 is straddling thesheet feeding apparatus 100A and theimage forming apparatus 10A. However, as a result of the third conveying roller R3 of theimage forming apparatus 10A being controlled by the sheetfeeding apparatus controller 200, the timings of deceleration and stop of the second conveying roller R2 and the third conveying roller R3 are synchronized. As a result of this, pulling and loosening of the long paper sheet P1 are suppressed. - When the conveyance of the long paper sheet P1 is stopped in the state of
FIG. 3C , the drive of the second conveying roller R2 and the third conveying roller R3 is switched to be performed under the control of themain body controller 20 in step SA5 ofFIG. 2 . Accordingly, as shown inFIG. 3D , the sheetfeeding apparatus controller 200 controls the drive of the first conveying roller R1, and themain body controller 20 controls the drive of the second conveying roller R2, the third conveying roller R3, and the fourth conveying roller R4. - The
main body controller 20 controls the drive of the third conveying roller R3 through the driving signal line S3 1 shown inFIG. 1 , and directly controls the drive of the second conveying roller R2 through the driving signal line S2 2 shown inFIG. 1 , and thus the second conveying roller R2 is driven in synchronization with the third conveying roller R3 and the fourth conveying roller R4 to resume the conveyance of the long paper sheet P1. In the state ofFIG. 3D , the first conveying roller R1 is stopped. - The accelerated long paper sheet P1 at the time of resuming the conveyance thereof after forming the loop is conveyed by the second conveying roller R2 of the
sheet feeding apparatus 100A and the third conveying roller R3 and the fourth conveying roller R4 of theimage forming apparatus 10A. In the case of the long paper sheet P1, the conveyance thereof is resumed from the state in which the long paper sheet P1 is straddling thesheet feeding apparatus 100A and theimage forming apparatus 10A. However, as a result of the second conveying roller R2 of thesheet feeding apparatus 100A being controlled by themain body controller 20, the timings of acceleration of the second conveying roller R2, the third conveying roller R3, and the fourth conveying roller R4 are synchronized. As a result of this, pulling and loosening of the long paper sheet P1 are suppressed. - In step SA6 of
FIG. 2 , when the leading end of the long paper sheet P1 having passed by the first sensor Sa is detected, the drive of the second conveying roller R2 is stopped, and the drive of the second conveying roller R2 is switched to be performed under the control of the sheetfeeding apparatus controller 200 in step SA7 ofFIG. 2 . Accordingly, as shown inFIG. 3E , the sheetfeeding apparatus controller 200 controls the drive of the first conveying roller R1 and the second conveying roller R2, and themain body controller 20 controls the drive of the third conveying roller R3 and the fourth conveying roller R4. - As shown in
FIG. 3F , in the case where the trailing end of the long paper sheet P1 has passed by the third conveying roller R3, the drive of the third conveying roller R3 is stopped. Then the long paper sheet P1 is conveyed to theimage forming portion 12 shown inFIG. 1 by the fourth conveying roller R4, and image formation is performed on the long paper sheet P1 whose skew and position in the main scanning direction have corrected by the registration swing. -
FIGS. 5A to 5F are each a diagram for explaining an operation showing an example of the operation of the sheet conveying system of the present embodiment, andFIG. 6 is a timing chart showing an example of an operation of the sheet conveying system according to the embodiment. - Next, the processing in the case of conveying a paper sheet as the paper sheet P will be described with reference to corresponding drawings. In the case where the
main body controller 20 has determined that the paper sheet P is a paper sheet P2 on the basis of sheet information such as the size of the paper sheet P set via theoperation portion 30, the sheetfeeding apparatus controller 200 controls the drive of the first conveying roller R1 and the second conveying roller R2, and themain body controller 20 controls the drive of the third conveying roller R3 and the fourth conveying roller R4 inFIG. 5A . Then the first conveying roller R1 and the second conveying roller R2 are driven to convey the paper sheet P2. As shown inFIG. 6 , in the state ofFIG. 5A , the third conveying roller R3 and the fourth conveying roller R4 are stopped. - As shown in
FIG. 5B , in the case where the leading end of the paper sheet P2 has been conveyed to a position where the leading end of the paper sheet P2 passes by the first sensor Sa and the paper sheet P2 is detected by the first sensor Sa, the third conveying roller R3 is driven. Since the second conveying roller R2 and the third conveying roller R3 need only be synchronized before the leading end of the paper sheet P2 conveyed by the second conveying roller R2 reaches the third conveying roller R3, the paper sheet P2 is not pulled or loosened even in the case where the second conveying roller R2 is controlled by the sheetfeeding apparatus controller 200 and the third conveying roller R3 is controlled by themain body controller 20. In the state ofFIG. 5B , the fourth conveying roller R4 is stopped. - After the trailing end of the paper sheet P2 has passed by the first conveying roller R1, the drive of the first conveying roller R1 is stopped. In addition, after the trailing end of the paper sheet P2 has passed by the second conveying roller R2, the drive of the second conveying roller R2 is stopped. Further, in the case where the paper sheet P2 is detected by the second sensor Sb, deceleration of the third conveying roller R3 is started, and the drive thereof is stopped.
- As described above, the paper sheet P2 is conveyed by a predetermined amount by the third conveying roller R3 with the fourth conveying roller R4 stopped, the leading end of the paper sheet P2 is caused to abut a nip portion constituted by an abutting portion of a pair of the fourth conveying roller R4, and thus a loop of the paper sheet P2 is formed between the third conveying roller R3 and the fourth conveying roller R4 as shown in
FIG. 5C . - The trailing end of the decelerated paper sheet P2 at the time of forming a loop and conveyance thereof being stopped has passed by the second conveying roller R2, and the paper sheet P2 is conveyed by the third conveying roller R3 of the
image forming apparatus 10A. Therefore, there is no need to synchronize the second conveying roller R2 of thesheet feeding apparatus 100A with the third conveying roller R3 of theimage forming apparatus 10A. - After forming a loop of the paper sheet P2 and stopping the conveyance thereof, the third conveying roller R3 and the fourth conveying roller R4 are driven to resume the conveyance of the paper sheet P2 in
FIG. 5D . In the state ofFIG. 5D , the first conveying roller R1 and the second conveying roller R2 are stopped. - The accelerated paper sheet P2 at the time of resuming the conveyance thereof after forming the loop is conveyed by the third conveying roller R3 and the fourth conveying roller R4 of the
image forming apparatus 10A as shown inFIG. 5E . Therefore, there is no need to synchronize the second conveying roller R2 of thesheet feeding apparatus 100A with the third conveying roller R3 of theimage forming apparatus 10A. - As shown in
FIG. 5F , in the case where the trailing end of the paper sheet P2 has passed by the third conveying roller R3, the drive of the third conveying roller R3 is stopped. Then, the paper sheet P2 is conveyed to theimage forming portion 12 shown inFIG. 1 by the fourth conveying roller R4, and image formation is performed on the paper sheet P2 whose skew and position in the main scanning direction have been corrected by the registration swing. - The present invention may be applied to an image forming system in which a long paper sheet of a length large enough to stop in a state of straddling devices in the middle of processing is conveyed.
- Although embodiments of the present invention have been described and illustrated in detail, the disclosed embodiments are made for purposes of illustration and example only and not limitation. The scope of the present invention should be interpreted by terms of the appended claims.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016-242684 | 2016-12-14 | ||
JP2016242684A JP6756257B2 (en) | 2016-12-14 | 2016-12-14 | Paper transport system and image formation system |
Publications (2)
Publication Number | Publication Date |
---|---|
US9994050B1 US9994050B1 (en) | 2018-06-12 |
US20180162146A1 true US20180162146A1 (en) | 2018-06-14 |
Family
ID=62485681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/815,921 Active US9994050B1 (en) | 2016-12-14 | 2017-11-17 | Sheet conveying system and image forming system |
Country Status (3)
Country | Link |
---|---|
US (1) | US9994050B1 (en) |
JP (1) | JP6756257B2 (en) |
CN (1) | CN108227420B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210155428A1 (en) * | 2019-11-27 | 2021-05-27 | Riso Kagaku Corporation | Transportation apparatus |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3096114B2 (en) | 1991-10-23 | 2000-10-10 | キヤノン株式会社 | Facsimile machine |
US5228558A (en) * | 1991-12-23 | 1993-07-20 | Interroll Holding A.G. | Control system for an accumulating conveyor |
DE60221412T2 (en) * | 2001-06-20 | 2008-04-10 | Itoh Electric Co. Ltd., Kasai | ZONE CONTROL |
JP4221652B2 (en) | 2002-11-27 | 2009-02-12 | 日本パルスモーター株式会社 | Multiple motor simultaneous control method, multiple motor control system, multiple motor control pulse generation circuit, and multiple motor control pulse generation IC |
JP4942151B2 (en) * | 2005-04-25 | 2012-05-30 | キヤノン株式会社 | Image forming system and image forming apparatus |
JP5335342B2 (en) * | 2008-09-17 | 2013-11-06 | キヤノン株式会社 | Image forming system, sheet conveyance control method thereof, image forming apparatus, and sheet supply apparatus |
DE102009016206A1 (en) * | 2009-04-03 | 2010-10-14 | Robert Bosch Gmbh | Method for web tension adjustment |
JP5538814B2 (en) * | 2009-10-26 | 2014-07-02 | キヤノン株式会社 | Sheet processing apparatus system and sheet processing apparatus |
JP5646866B2 (en) * | 2010-03-31 | 2014-12-24 | キヤノン株式会社 | Medium transport device |
US8550234B2 (en) * | 2010-12-07 | 2013-10-08 | Interroll Corporation | Sequential controlled start-up for zoned conveyor systems |
JP5664587B2 (en) * | 2012-04-16 | 2015-02-04 | コニカミノルタ株式会社 | Image forming system and program |
JP5874573B2 (en) * | 2012-08-07 | 2016-03-02 | コニカミノルタ株式会社 | Relay device and image forming system |
-
2016
- 2016-12-14 JP JP2016242684A patent/JP6756257B2/en active Active
-
2017
- 2017-11-17 US US15/815,921 patent/US9994050B1/en active Active
- 2017-12-07 CN CN201711283451.0A patent/CN108227420B/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210155428A1 (en) * | 2019-11-27 | 2021-05-27 | Riso Kagaku Corporation | Transportation apparatus |
US11584599B2 (en) * | 2019-11-27 | 2023-02-21 | Riso Kagaku Corporation | Transportation apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN108227420A (en) | 2018-06-29 |
JP2018095435A (en) | 2018-06-21 |
CN108227420B (en) | 2019-08-30 |
US9994050B1 (en) | 2018-06-12 |
JP6756257B2 (en) | 2020-09-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8308160B2 (en) | Sheet conveying apparatus and image forming apparatus with oblique feed rollers | |
JP5721461B2 (en) | Image forming apparatus and control method thereof | |
US10618760B2 (en) | Sheet conveyance apparatus | |
JP5201966B2 (en) | Image forming apparatus | |
US9272862B2 (en) | Sheet feeding device and image forming apparatus | |
JP5750413B2 (en) | Recording medium conveying apparatus and image forming apparatus | |
US20190025749A1 (en) | Sheet conveyance apparatus | |
JP2008239332A (en) | Sheet carrier device, image formation device and image reading device | |
US10747161B2 (en) | Sheet conveyance apparatus | |
US11299360B2 (en) | Image forming apparatus for forming image on sheet | |
US10852683B2 (en) | Sheet conveyance apparatus | |
US8622380B2 (en) | Sheet feeding device and image forming apparatus | |
US9994050B1 (en) | Sheet conveying system and image forming system | |
JP2017114613A (en) | Sheet post-processing device | |
JP6214354B2 (en) | Sheet feeding apparatus and image forming apparatus | |
US9878863B2 (en) | Device and method for controlling paper interval in paper feeder of image forming apparatus, and image forming apparatus including the device | |
JP7282499B2 (en) | Sheet conveying device and image forming device | |
US20140284875A1 (en) | Sheet processing apparatus and image forming apparatus | |
JP2008037635A (en) | Recording paper conveying device for image forming device | |
JP4549305B2 (en) | Image forming system, sheet conveying apparatus, image forming apparatus, and control method thereof | |
JP2014101186A (en) | Paper feeder and image formation system | |
JP2002029649A (en) | Sheet carrying device and image forming device | |
JP2002019997A (en) | Image forming device and paper carrying method | |
US20230159297A1 (en) | Sheet discharge apparatus and image forming system | |
JP2008273673A (en) | Sheet skew correcting device and image forming device using the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KONICA MINOLTA, INC., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOJIMA, KIYOTO;YOKOYA, TAKAHIRO;NISHIKAWA, EIJI;REEL/FRAME:044159/0193 Effective date: 20171107 |
|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.) |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |