US20180201461A1 - Sheet post-processing device - Google Patents
Sheet post-processing device Download PDFInfo
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- US20180201461A1 US20180201461A1 US15/919,277 US201815919277A US2018201461A1 US 20180201461 A1 US20180201461 A1 US 20180201461A1 US 201815919277 A US201815919277 A US 201815919277A US 2018201461 A1 US2018201461 A1 US 2018201461A1
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- Prior art keywords
- sheet
- speed
- post
- processing
- tray
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
- B65H29/125—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers between two sets of rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
- B65H29/14—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers and introducing into a pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/20—Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders
- B65H29/22—Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders and introducing into a pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
- B65H29/34—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from supports slid from under the articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/68—Reducing the speed of articles as they advance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/70—Article bending or stiffening arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/02—Pile receivers with stationary end support against which pile accumulates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3009—Arrangements for removing completed piles by dropping, e.g. removing the pile support from under the pile
- B65H31/3018—Arrangements for removing completed piles by dropping, e.g. removing the pile support from under the pile from opposite part-support elements, e.g. operated simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3027—Arrangements for removing completed piles by the nip between moving belts or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/34—Apparatus for squaring-up piled articles
- B65H31/36—Auxiliary devices for contacting each article with a front stop as it is piled
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/421—Forming a pile
- B65H2301/4212—Forming a pile of articles substantially horizontal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/421—Forming a pile
- B65H2301/4213—Forming a pile of a limited number of articles, e.g. buffering, forming bundles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/512—Changing form of handled material
- B65H2301/5121—Bending, buckling, curling, bringing a curvature
- B65H2301/51214—Bending, buckling, curling, bringing a curvature parallel to direction of displacement of handled material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/60—Other elements in face contact with handled material
- B65H2404/69—Other means designated for special purpose
- B65H2404/693—Retractable guiding means, i.e. between guiding and non guiding position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/10—Size; Dimensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/21—Angle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/22—Distance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/10—Mass, e.g. mass flow rate; Weight; Inertia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/24—Post -processing devices
- B65H2801/27—Devices located downstream of office-type machines
Definitions
- Embodiments described herein relate generally to a sheet post-processing device.
- a Multiple Function Peripheral (MFP) of the related art includes a sheet post-processing device that post-processes sheets transported from an image forming device.
- the sheet post-processing device includes a processing tray that holds the sheets for post-processing of the sheets, inlet rollers through which the sheet is input from the image forming device, and outlet rollers that output the sheet input from the inlet rollers to the processing tray.
- the sheet post-processing device controls a transport speed of the sheet when discharging the sheet from the outlet rollers to the processing tray. The control of the transport speed is performed at timing near the exit of a trailing end of the sheet from the outlet rollers after a leading end of the sheet comes into contact with the processing tray.
- first transport speed that is a speed for transporting the sheet
- second transport speed first transport speed>the second transport speed
- the sheet post-processing device performs control to decelerate the transport speed of the sheet from the first transport speed to the second transport speed in the vicinity of the exit of the trailing end of the sheet from the outlet rollers.
- positions of the sheets discharged on the processing tray may be varied.
- FIG. 1 is a view illustrating an entire configuration example of an image forming system of an embodiment.
- FIG. 2 is a block diagram illustrating a functional configuration example of the image forming system.
- FIG. 3 is a view schematically illustrating a configuration of a sheet post-processing device of a first embodiment.
- FIG. 4 is a block diagram illustrating functional blocks related to control of a transport speed of a sheet in a post-processing control section.
- FIG. 5 is a flowchart illustrating a control operation example of the transport speed of the sheet in the post-processing control section of the sheet post-processing device.
- FIG. 6 is a diagram comparing a control operation of the transport speed of the sheet in the post-processing control section to a control operation in the related art.
- FIG. 7 is a flowchart illustrating an operation example for controlling the transport speed of the sheet in a multistage manner in the post-processing control section of the sheet post-processing device.
- FIG. 8 is a diagram describing the control operation of the transport speed of the sheet in the multistage manner in the post-processing control section.
- FIG. 9 is a view schematically describing a configuration of the sheet post-processing device in a second embodiment.
- FIG. 10 is a view illustrating a state in which a corrugation cam is functioning.
- FIG. 11 is a block diagram illustrating functional blocks related to the control of the transport of the sheet discharged to a standby tray in the post-processing control section.
- FIG. 12 is a flowchart illustrating an operation example of control of a transport amount of the sheet on the standby tray in the post-processing control section of the second embodiment.
- FIG. 13 is a timing chart describing a control operation of the transport amount of the sheet in the post-processing control section of the second embodiment.
- a sheet post-processing device of an embodiment has a first tray, outlet rollers, and a control section.
- the first tray holds sheets for post-processing with respect to the sheets supplied from an image forming device.
- the outlet rollers discharge the sheet to the first tray.
- the control section controls a rotational speed of the outlet rollers to be decelerated after a leading end portion of the sheet passes through the outlet rollers and before the leading end portion of the sheet comes into contact with the first tray.
- FIG. 1 is a view illustrating an entire configuration example of an image forming system 1 of an embodiment.
- FIG. 2 is a block diagram illustrating a functional configuration example of the image forming system 1 illustrated in FIG. 1 .
- the image forming system 1 includes an image forming device 2 and a sheet post-processing device 3 .
- the image forming device 2 forms an image on a sheet-shaped medium (hereinafter, referred to as “sheet”) such as paper.
- sheet post-processing device 3 post-processes the sheets transported from the image forming device 2 .
- the image forming device 2 includes a control panel 11 , a scanner 12 , a printer 13 , a sheet feeding section 14 , a sheet discharge section 15 , and an image forming control section 16 .
- the control panel 11 includes various keys for receiving operations of a user. For example, the control panel 11 receives an input related to types of post-processing of the sheets. The control panel 11 transmits information (including information related to types of the sheets) related to the types of input post-processing to the sheet post-processing device 3 .
- the scanner 12 includes a reading section for reading image information of a copy object.
- the scanner 12 transmits the read image information to the printer 13 .
- the printer 13 forms an output image (hereinafter, referred to as “toner image”) by developer such as toner based on image information transmitted from the scanner 12 or an external device.
- the printer 13 transfers the toner image on a surface of the sheet.
- the printer 13 fixes the toner image onto the sheet by applying heat and pressure to the toner image that is transferred to the sheet.
- the sheet feeding section 14 supplies the sheets to the printer 13 one by one in accordance with timing when the printer 13 forms the toner image.
- the sheet discharge section 15 transports the sheet discharged from the printer 13 to the sheet post-processing device 3 .
- the image forming control section 16 controls an entire operation of the image forming device 2 . That is, the image forming control section 16 controls the control panel 11 , the scanner 12 , the printer 13 , the sheet feeding section 14 , and the sheet discharge section 15 .
- the image forming control section 16 is formed of a control circuit including a CPU, a ROM, and a RAM.
- the sheet post-processing device 3 is disposed adjacent to the image forming device 2 .
- the sheet post-processing device 3 executes post-processing that is designated through the control panel 11 on the sheets transported from the image forming device 2 .
- post-processing is stapling or sorting.
- the sheet post-processing device 3 includes a standby section 21 , a processing section 22 , a discharge section 23 , and the post-processing control section 24 .
- the standby section 21 causes the sheet S (see FIG. 3 ) transported from the image forming device 2 to temporarily stay (buffer). For example, the standby section 21 causes a following plurality of sheets S to be on standby during post-processing of a preceding sheet S performed by the processing section 22 .
- the standby section 21 is provided above the processing section 22 .
- the standby section 21 drops the staying sheet S to the processing section 22 , for example, by retreating from above the processing section 22 if the sheet of the processing section 22 is discharged to the discharge section 23 .
- the processing section 22 performs post-processing in the sheets S. For example, the processing section 22 aligns the plurality of sheets S. The processing section 22 performs stapling in the plurality of aligned sheets S. Therefore, the plurality of sheets S are bound together.
- the processing section 22 discharges the post-processed sheets S to the discharge section 23 .
- the discharge section 23 includes a fixed tray 23 a and a movable tray 23 b.
- the fixed tray 23 a is provided in an upper portion of the sheet post-processing device 3 .
- the movable tray 23 b is provided in a side portion of the sheet post-processing device 3 .
- the sorting sheets S are discharged to the fixed tray 23 a and the movable tray 23 b.
- the post-processing control section 24 controls an entire operation of the sheet post-processing device 3 . That is, the post-processing control section 24 controls the standby section 21 , the processing section 22 , and the discharge section 23 . In addition, as illustrated in FIG. 2 , the post-processing control section 24 controls an inlet roller 32 a, an outlet roller 33 a, and a paddle section 34 described below.
- the post-processing control section 24 is formed of a control circuit including a CPU, a ROM, and a RAM.
- FIG. 3 is a view schematically illustrating a configuration of the sheet post-processing device 3 of the first embodiment.
- the sheet post-processing device 3 has a transport path 31 of the sheet S, a pair of the inlet rollers 32 a and 32 b, a pair of the outlet rollers 33 a and 33 b, the standby section 21 , the paddle section 34 , and the processing section 22 .
- sheet transporting direction refers to a transporting direction D (entering direction of the sheet S to the standby tray 41 ) of the sheet S with respect to the standby tray 41 of the standby section 21 .
- upstream side and downstream side respectively refer to an upstream side and a downstream side in the sheet transporting direction D.
- leading end portion and “trailing end portion” respectively refer to “end portion on the downstream side” and “end portion of the upstream side” in the transporting direction D.
- a direction that is substantially parallel to an upper surface (transport surface) of the standby tray 41 and is substantially orthogonal to the sheet transporting direction D refers to a sheet width direction W.
- the transport path 31 is provided on the inside of the sheet post-processing device 3 .
- the transport path 31 has a sheet supply port 31 p and a sheet discharge port 31 d.
- the sheet supply port 31 p faces the image forming device 2 .
- the sheet S is supplied from the image forming device 2 to the sheet supply port 31 p.
- the sheet discharge port 31 d is positioned in the vicinity of the standby section 21 .
- the sheet S passing through the transport path 31 is discharged from the sheet discharge port 31 d onto the standby tray 41 of the standby section 21 .
- the inlet rollers 32 a and 32 b are provided in the vicinity of the sheet supply port 31 p.
- the inlet rollers 32 a and 32 b transport the sheet S supplied to the sheet supply port 31 p toward the downstream side of the transport path 31 .
- the inlet rollers 32 a and 32 b transport the sheet S supplied to the sheet supply port 31 p to the outlet rollers 33 a and 33 b.
- An inlet sensor 35 is provided in the vicinity of the inlet roller 32 a and detects the sheet S passing through the sheet supply port 31 p.
- the inlet sensor 35 outputs a detection signal of a high level, for example, when detecting the sheet S and outputs a detection signal of a low level when not detecting the sheet S.
- the outlet rollers 33 a and 33 b are provided in the vicinity of the sheet discharge port 31 d.
- the outlet rollers 33 a and 33 b receive the sheet S transported by the inlet rollers 32 a and 32 b.
- the outlet rollers 33 a and 33 b transport the sheet S from the sheet discharge port 31 d to the standby section 21 .
- An outlet sensor 36 is provided in the vicinity of the outlet roller 33 a and detects the sheet S passing through the sheet discharge port 31 d.
- the outlet sensor 36 outputs a detection signal of a high level, for example, when detecting the sheet S and outputs a detection signal of a low level when not detecting the sheet S.
- the standby section 21 has the standby tray (buffer tray) 41 , a transport guide 43 , and discharge rollers 44 a and 44 b.
- the standby tray 41 is an example of “second tray”. A rear end portion of the standby tray 41 is positioned in the vicinity of the outlet rollers 33 a and 33 b.
- the standby tray 41 overlaps the plurality of sheets S to be on standby when post-processing is performed by the processing section 22 .
- the standby tray 41 has a bottom wall 45 supporting the sheet S from below.
- the bottom wall 45 is configured of, for example, two plate-shaped members in parallel to the sheet transporting direction.
- the two plate-shaped members hold the sheet S on plate surfaces thereof.
- the two plate-shaped members drop the held sheet S on a processing tray 61 by retreating to be divided in the rightward and leftward direction perpendicular to the sheet transporting direction.
- the paddle section 34 is provided between the standby tray 41 and the processing tray 61 .
- the paddle section 34 presses the sheet S toward the processing tray 61 by rotating if the sheet S is transported from the standby tray 41 to the processing tray 61 . Furthermore, the paddle section 34 transports the sheet S dropped on the processing tray 61 to a stapler 62 described below.
- the paddle section 34 has a rotary shaft 49 , a rotary body 50 , a plurality of first paddles 51 , and a plurality of second paddles 52 .
- the processing section 22 has the processing tray 61 , the stapler 62 , transport rollers 63 a and 63 b, and a transport belt 64 .
- the processing tray 61 is an example of “first tray”.
- the processing tray 61 is provided below the standby tray 41 .
- the plurality of sheets S transported to the processing tray 61 are aligned in the sheet width direction W and the sheet transporting direction D by an alignment plate and the like.
- the stapler 62 is provided in an end portion of the processing tray 61 .
- the stapler 62 performs stapling (stitching) in a bundle of a predetermined number of the sheets S positioned on the processing tray 61 .
- the transport rollers 63 a and 63 b are disposed at predetermined intervals in the sheet transporting direction D.
- the transport belt 64 is stretched between the transport rollers 63 a and 63 b.
- the transport belt 64 is rotated in synchronization with the transport rollers 63 a and 63 b.
- the transport belt 64 transports the sheet S between the stapler 62 and the discharge section 23 .
- the post-processing control section 24 of the sheet post-processing device 3 controls the transport speed of the sheet S by controlling a rotational speed of the outlet rollers 33 a and 33 b when discharging the sheet S to the processing tray 61 .
- the control of the transport speed of the sheet S in the post-processing control section 24 in the first embodiment will be described.
- the sheet S is assumed to be in a state of being directly discharged to the processing tray 61 without passing through the standby tray 41 .
- FIG. 4 is a block diagram illustrating functional blocks related to the control of the transport speed of the sheet S in the post-processing control section 24 .
- the post-processing control section 24 includes a communication section 241 , a sheet information acquisition section 242 , a sensor information acquisition section 243 , and a rotation control section 244 .
- the communication section 241 performs communication with the control panel 11 of the image forming device 2 .
- the sheet information acquisition section 242 acquires information related to a type of post-processing input from the control panel 11 via the communication section 241 and information related to a type of the sheet S on which post-processing is performed.
- the information related to the type of the sheet S includes information (information of A4, A3, and the like) related to the size of the sheet S, information related to a basis weight of the sheet S, information related to a material of the sheet S, and the like.
- the basis weight of the sheet S is a weight of the sheet S per square meter (g/m 2 ).
- the sensor information acquisition section 243 acquires a detection signal according to the detection of the sheet S passing through the sheet discharge port 31 d from the outlet sensor 36 .
- the detection signal of the high level indicating detection of the sheet S is referred to as an ON signal and the detection signal of the low level indicating no detection of the sheet S is referred to as an OFF signal.
- the rotation control section 244 sets the first speed and the second speed that are the transport speeds of the sheet S based on the information related to the sheet S that is the transport object acquired by the sheet information acquisition section 242 .
- the rotation control section 244 controls the transport speed of the sheet S based on the detection signal and the information related to the sheet S acquired by the sensor information acquisition section 243 .
- the rotation control section 244 controls the rotational speed of a driving motor rotating the outlet rollers 33 a and 33 b by a pulse speed (pps: pulses per second). That is, the rotation control section 244 controls the transport speed of the sheet S by controlling the rotational speed of the outlet rollers 33 a and 33 b.
- the rotation control section 244 sets the first speed to a v 1 (pps) and sets the second speed of the sheet S to a v 2 (pps), for example, based on the information related to the sheet S.
- the transport speeds of the sheet S are the first speed that is a speed for transporting the sheet S in the transport path 31 and the second speed (first speed>second speed) that is a speed suitable for discharging the sheet S to the processing tray 61 .
- the speed suitable for discharging the sheet S to the processing tray 61 is a speed at which the discharged sheet S lands on a predetermined position of the processing tray 61 . That is, the post-processing control section 24 controls the sheet S so that the sheet S is transported in the transport path at the first speed or the second speed.
- the rotation control section 244 decelerates the transport speed before the leading end portion of the sheet S colliding with the processing tray 61 based on timing when the detection signal becomes the ON signal and the size of the sheet S.
- the timing when the detection signal becomes the ON signal is timing when the leading end portion of the sheet S passes through the sheet discharge port 31 d.
- the timing when the detection signal becomes the ON signal is timing when the leading end portion of the sheet S passes through the sheet discharge port 31 d.
- a transport amount from the sheet discharge port 31 d to immediately before the leading end portion of the sheet S colliding with the processing tray 61 is a first transport amount.
- the rotation control section 244 monitors the transport amount of the sheet S from a time point when the leading end portion of the sheet S passes through the sheet discharge port 31 d and performs deceleration at a time point when the sheet S is transported by the first transport amount.
- the rotation control section 244 also sets the first transport amount based on the information related to the sheet S when setting the first speed and the second speed.
- FIG. 5 is a flowchart illustrating a control operation example of the transport speed of the sheet S in the post-processing control section 24 of the sheet post-processing device 3 .
- the sheet information acquisition section 242 acquires the information related to the type of post-processing and the information related to the type of the sheet S to which post-processing is performed (ACT 11 ).
- the rotation control section 244 sets the first speed and the second speed that are the transport speeds of the sheet S, and the first transport amount based on the information related to the sheet S that is the transport object acquired by the sheet information acquisition section 242 (ACT 12 ).
- the rotation control section 244 determines whether or not the ON signal is acquired from the outlet sensor 36 by the sensor information acquisition section 243 (ACT 14 ). Here, if it is determined that the ON signal is not acquired (NO of ACT 14 ), the rotation control section 244 performs the process of ACT 14 again. If it is determined that the ON signal is acquired (YES of ACT 14 ), the rotation control section 244 determines whether or not the sheet S is transported by the first transport amount after the sheet S passes through the sheet discharge port 31 d (ACT 15 ).
- the rotation control section 244 determines whether or not the sensor information acquisition section 243 acquires the OFF signal from the outlet sensor 36 (ACT 17 ). Here, if it is determined that the OFF signal is not acquired (NO of ACT 17 ), the rotation control section 244 performs the process of ACT 17 again. If it is determined that the OFF signal is acquired (YES of ACT 17 ), the rotation control section 244 stops the driving motor of the outlet rollers 33 a and 33 b (ACT 18 ).
- FIG. 6 is a diagram comparing the control operation of the transport speed of the sheet S in the post-processing control section 24 to the control operation in the related art.
- the sheet post-processing device of the related art decelerates the speed of the sheet from a first transport speed (corresponding to the first speed in the first embodiment) to a second transport speed (corresponding to the second speed in the first embodiment) at a time t 3 elapsed a period T 1 after the ON signal of the outlet sensor is detected at a time t 1 .
- the time t 3 is timing before (before the trailing end portion of the sheet passes through a sheet discharge port) the outlet sensor outputs the OFF signal. Even if the sheet is decelerated in the timing, the sheet may be buckled due to the following reasons.
- the transport of the sheet is obstructed by friction between the sheet and the processing tray. That is, the transport speed of the leading end portion of the sheet is decreased due to the friction with the processing tray.
- first transport speed a speed difference of the transport speeds of the leading end portion of the sheet and the trailing end portion thereof is increased. Therefore, buckling is likely to occur in the sheet.
- the sheet post-processing device 3 in the first embodiment decelerates the speed of the sheet from the first speed to the second speed at a time t 2 elapsed a period T 2 after the ON signal of the outlet sensor is detected at the time t 1 .
- the time t 2 is timing elapsed the period T 2 that is a time required to transport the sheet S from the time t 1 by the first transport amount described above.
- control in which the outlet sensor issues the OFF signal at the time t 4 , and the driving motor rotating the outlet rollers 33 a and 33 b is stopped at the time t 5 is the same as that of the related art.
- the sheet post-processing device of the related art completes the deceleration from the first transport speed to the second transport speed in the vicinity of the exit of the trailing end of the sheet from the outlet rollers after the leading end portion of the sheet comes into contact with the processing tray. Therefore, the sheet collides with the processing tray at the first transport speed that is a high speed and thereafter, a behavior of the sheet transported at the first transport speed until exiting the outlet rollers is not stable due to buckling and the like.
- the sheet post-processing device 3 of the first embodiment completes the deceleration of the transport speed of the sheet S discharged to the processing tray 61 from the first speed to the second speed before the leading end portion of the sheet S comes into contact with the processing tray 61 .
- the sheet post-processing device 3 can suppress the occurrence of the buckling of the sheet S when coming into contact with the processing tray 61 . If the occurrence of the buckling of the sheet S is suppressed, thereafter, aligning and the like in the paddle section 34 are stable and accuracy of vertical alignment of the sheets S is improved.
- the post-processing control section 24 of the sheet post-processing device 3 may control the transport speed of the sheet S in a multistage manner.
- a rotation control section 244 sets a third speed in addition to the first speed and the second speed based on information related to the sheet S.
- the third speed is a value (first speed>third speed>second speed) that is less than the first speed and greater than the second speed.
- the third speed is preferably the fastest speed in a range in which the sheet S is not buckled when the sheet S comes into contact with a processing tray 61 and is, for example, v 3 (pps).
- the rotation control section 244 performs deceleration to the third speed at a time point when the sheet S is transported by the first transport amount after the leading end portion of the sheet S passes through the sheet discharge port 31 d.
- a transport amount until immediately before the trailing end portion of the sheet S passes through the sheet discharge port 31 d is referred to as a second transport amount.
- the rotation control section 244 performs the deceleration from the third speed to the second speed at a time point when the sheet S is transported by the second transport amount after the leading end portion of the sheet S passes through the sheet discharge port 31 d.
- the rotation control section 244 also sets the first transport amount and the second transport amount based on information related to the sheet S when setting the first speed, the second speed, and the third speed.
- FIG. 7 is a flowchart illustrating an operation example for controlling the transport speed of the sheet S in the multistage manner in the post-processing control section 24 of the sheet post-processing device 3 .
- the same reference numerals are given to the same processes in FIG. 6 and the description will be simplified or omitted.
- the rotation control section 244 determines whether or not the sheet S is transported by the first transport amount after the sheet S passes through the sheet discharge port 31 d (ACT 15 ). If it is determined that the sheet S is not transported by the first transport amount (NO of ACT 15 ), the rotation control section 244 performs the process of ACT 15 again.
- the rotation control section 244 determines whether or not the sheet S is transported by the second transport amount after the sheet S passes through the sheet discharge port 31 d (ACT 72 ). If it is determined that the sheet S is not transported by the second transport amount (NO of ACT 72 ), the rotation control section 244 performs the process of ACT 72 again.
- FIG. 8 is a diagram describing the control operation of the transport speed of the sheet S in the multistage manner in the post-processing control section 24 .
- the sheet post-processing device 3 in modification example of the first embodiment decelerates the speed of the sheet from the first speed to the third speed at the time t 2 elapsed the period T 2 after the ON signal of the outlet sensor is detected at the time t 1 .
- the time t 2 is timing elapsed the period T 2 that is a time required to transport the sheet S from the time t 1 by the first transport amount described above.
- the sheet post-processing device 3 decelerates the speed of the sheet S from the third speed to the second speed at a time t 6 elapsed a period T 3 from the time t 1 .
- the time t 6 is timing elapsed the period T 3 that is a time required to transport the sheet S from the time t 1 by the second transport amount.
- the control in which the outlet sensor issues the OFF signal in the time t 4 and the driving motor rotating the outlet rollers 33 a and 33 b is stopped at the time t 5 is the same as that of FIG. 6 .
- the sheet post-processing device 3 that is a modification example of the first embodiment can shorten a time until the discharge of the sheet S is completed in addition to the advantages described above in the first embodiment.
- the sheet post-processing device 3 of the first embodiment described above is configured to control the transport speed of the sheet S when the sheet S is directly discharged to the processing tray 61 without passing through the standby tray 41 .
- a sheet post-processing device 3 of a second embodiment controls the transport of the sheet S when the sheet S is directly discharged to the standby tray 41 in addition to the function of the sheet post-processing device 3 of the first embodiment.
- the sheet post-processing device 3 drops the sheets S on the processing tray 61 . Thereafter, the sheet post-processing device 3 directly discharges fourth and fifth sheets S to the processing tray 61 .
- the sheet post-processing device 3 of the second embodiment performs transporting of the fourth and fifth sheets S by the control described in the first embodiment. Then, the sheet post-processing device 3 of the second embodiment performs transporting of the initial three sheets S by control described in the second embodiment that is described below.
- an entire configuration of an image forming system 1 including the sheet post-processing device 3 of the second embodiment is the same as the configuration of FIG. 1 .
- a functional configuration of the image forming system 1 including the sheet post-processing device 3 of the second embodiment is the same as the configuration of FIG. 2 .
- FIG. 9 is a view schematically describing a configuration of the sheet post-processing device 3 in the second embodiment. Moreover, in FIG. 9 , the same references are given to the same configuration elements as FIG. 3 and the description will be simplified or omitted.
- the sheet post-processing device 3 illustrated in FIG. 9 is different from the sheet post-processing device 3 illustrated in FIG. 3 that a corrugation cam 37 is further included.
- the corrugation cam 37 is a cam that presses, for example, a center of the sheet S in a width W direction transported along the transport guide 43 .
- the corrugation cam 37 causes a shape of a pressed portion of the sheet S to be a recessed arc shape by pressing the sheet Sand imparts rigidity with respect to the sheet S. Therefore, the rigidity of the sheet S is increased in a direction parallel to the transporting direction D.
- the corrugation cam 37 illustrated in FIG. 9 has a fan-shaped form and rotates around the pivot of the fan shape as illustrated in FIG. 10 .
- the corrugation cam 37 illustrated in FIG. 9 is retreated above from the transport guide 43 and is not functioning.
- FIG. 10 is a view illustrating a state in which the corrugation cam 37 is functioning. Moreover, since each reference numeral in FIG. 10 is the same as that of FIG. 9 , the description will be omitted.
- FIG. 11 is a block diagram illustrating functional blocks related to the control of the transport of the sheet S discharged to a standby tray 41 in the post-processing control section 24 .
- the same numerals are given to the configurations having the same function as FIG. 4 and the description will be omitted.
- the post-processing control section 24 includes a communication section 241 , a sheet information acquisition section 242 , a sensor information acquisition section 243 , a rotation control section 244 a, and a posture control section 245 .
- the rotation control section 244 a controls the transport of the sheet S discharged to the standby tray 41 in addition to the function of the rotation control section 244 illustrated in FIG. 3 .
- the posture control section 245 determines whether or not the corrugation cam 37 is functioning and controls the corrugation cam 37 based on information related to the sheet S of the transport object acquired by the sheet information acquisition section 242 .
- the corrugation cam 37 is in a state of functioning illustrated in FIG. 10 or a state of not functioning illustrated in FIG.
- the posture control section 245 causes the corrugation cam 37 to function if the sheet S of the transport object is equal to or greater than a predetermined size and causes the corrugation cam 37 to do not function if the sheet S of the transport object is less than the predetermined size.
- Rigidity of paper having a large size becomes low as a distance transported from the outlet rollers 33 a and 33 b is increased when the paper remains flat.
- the shape of the sheet S is curved in the arc shape by the corrugation cam 37 , the rigidity is increased and it is possible to hold the rigidity of the sheet S even if the distance existing from the outlet rollers 33 a and 33 b is increased.
- the rotation control section 244 a performs transport of the sheet S smaller than the predetermined size by the third transport amount after the trailing end portion of the sheet S exits the sheet discharge port 31 d.
- the rotation control section 244 a performs transport of the sheet S equal to or greater than the predetermined size by the fourth transport amount after the trailing end portion of the sheet S exits the sheet discharge port 31 d.
- the rotation control section 244 a can stabilize the positions (buffer positions) of the plurality of sheets S held in the standby tray 41 by changing the transport amount with the size of the sheet S as described above.
- the rotation control section 244 a monitors the transport amount of the sheet S after a time point when the trailing end portion of the sheet S passes through the sheet discharge port 31 d and transports the sheet S by the third transport amount or the fourth transport amount depending on the size of the sheet S.
- FIG. 12 is a flowchart illustrating an operation example of control of a transport amount of the sheet S on the standby tray 41 in the post-processing control section 24 of the second embodiment.
- the sheet information acquisition section 242 acquires information related to the type of post-processing and information related to the type of the sheet S to which post-processing is performed (ACT 21 ).
- the rotation control section 244 a sets the third transport amount or the fourth transport amount as the transport amount of the sheet S based on information related to the sheet S of the transport object acquired by the sheet information acquisition section 242 (ACT 22 ).
- the sheet post-processing device 3 transports the sheet S to the standby tray 41 at the first speed if the sheet S is supplied to the sheet supply port 31 p (ACT 23 ).
- the rotation control section 244 a determines whether or not the sensor information acquisition section 243 acquires the OFF signal from the outlet sensor 36 (ACT 24 ). If it is determined that the OFF signal is not acquired (NO of ACT 24 ), the rotation control section 244 a performs the process of ACT 24 again. If it is determined that the OFF signal is acquired (YES of ACT 24 ), the rotation control section 244 a determines whether or not the size of the sheet S is equal to or greater than the predetermined size (ACT 25 ). Here, if it is determined that the size of the sheet S is less than the predetermined size (NO of ACT 25 ), the rotation control section 244 a transports the sheet S with the third transport amount (ACT 27 ).
- the rotation control section 244 a transports the sheet S with the fourth transport amount (ACT 26 ).
- the rotation control section 244 a completes the transport process with respect to the sheet S if the process of ACT 26 or ACT 27 is completed.
- the rotation control section 244 a in the second embodiment stops the transport of the sheet S at a time t 13 elapsed a period T 4 after the OFF signal of the outlet sensor is detected at a time t 11 .
- the time t 13 is timing elapsed the period T 4 that is a time required to transport the sheet S from the time t 11 by the third transport amount described above.
- the rotation control section 244 a in the second embodiment stops the transport of the sheet S at a time t 12 elapsed a period T 5 after the OFF signal of the outlet sensor is detected at a time t 11 .
- the time t 12 is timing elapsed the period T 5 that is a time required to transport the sheet S from the time t 11 by the fourth transport amount described above.
- the transport amount to be transported is shorter in a case in which the size of the sheet S is equal to or greater than the predetermined size than in a case in which the size of the sheet S is less than the predetermined size. That is, in the rotation control section 244 a, the transport amount to be transported is shortened in the case in which the size of the sheet S is equal to or greater than the predetermined size compared to the case in which the size of the sheet S is less than the predetermined size.
- the rotation control section 244 a in the second embodiment can suppress variation of the rear end position of the sheet S and stabilize the rear end position of the sheet S due to a difference in the transport path for each size of the sheet S by causing the transport amount of the sheet S to be adjusted on the standby tray 41 . Therefore, the sheet post-processing device 3 in the second embodiment can stabilize the buffer position by the standby tray 41 and then can also stabilize drop of the sheet onto the processing tray 61 .
- the sheet post-processing device 3 can suppress occurrence of the buckling of the sheet S when coming into contact with the processing tray 61 .
Abstract
Description
- This application is a Continuation of application Ser. No. 15/096,342 filed on Apr. 12, 2016, the entire contents of which are incorporated herein by reference.
- Embodiments described herein relate generally to a sheet post-processing device.
- A Multiple Function Peripheral (MFP) of the related art includes a sheet post-processing device that post-processes sheets transported from an image forming device. The sheet post-processing device includes a processing tray that holds the sheets for post-processing of the sheets, inlet rollers through which the sheet is input from the image forming device, and outlet rollers that output the sheet input from the inlet rollers to the processing tray. The sheet post-processing device controls a transport speed of the sheet when discharging the sheet from the outlet rollers to the processing tray. The control of the transport speed is performed at timing near the exit of a trailing end of the sheet from the outlet rollers after a leading end of the sheet comes into contact with the processing tray. In addition, in the transport speed of the sheet, there are a first transport speed that is a speed for transporting the sheet and a second transport speed (first transport speed>the second transport speed) that is a speed suitable for discharging the sheet to the processing tray. The sheet post-processing device performs control to decelerate the transport speed of the sheet from the first transport speed to the second transport speed in the vicinity of the exit of the trailing end of the sheet from the outlet rollers. However, in the control of the transport speed of the sheet in such a sheet post-processing device, the speed (=first transport speed) of the sheet in the middle of discharging the sheet from the outlet rollers to the processing tray is large and the sheet may be buckled and the like. Thus, positions of the sheets discharged on the processing tray may be varied.
-
FIG. 1 is a view illustrating an entire configuration example of an image forming system of an embodiment. -
FIG. 2 is a block diagram illustrating a functional configuration example of the image forming system. -
FIG. 3 is a view schematically illustrating a configuration of a sheet post-processing device of a first embodiment. -
FIG. 4 is a block diagram illustrating functional blocks related to control of a transport speed of a sheet in a post-processing control section. -
FIG. 5 is a flowchart illustrating a control operation example of the transport speed of the sheet in the post-processing control section of the sheet post-processing device. -
FIG. 6 is a diagram comparing a control operation of the transport speed of the sheet in the post-processing control section to a control operation in the related art. -
FIG. 7 is a flowchart illustrating an operation example for controlling the transport speed of the sheet in a multistage manner in the post-processing control section of the sheet post-processing device. -
FIG. 8 is a diagram describing the control operation of the transport speed of the sheet in the multistage manner in the post-processing control section. -
FIG. 9 is a view schematically describing a configuration of the sheet post-processing device in a second embodiment. -
FIG. 10 is a view illustrating a state in which a corrugation cam is functioning. -
FIG. 11 is a block diagram illustrating functional blocks related to the control of the transport of the sheet discharged to a standby tray in the post-processing control section. -
FIG. 12 is a flowchart illustrating an operation example of control of a transport amount of the sheet on the standby tray in the post-processing control section of the second embodiment. -
FIG. 13 is a timing chart describing a control operation of the transport amount of the sheet in the post-processing control section of the second embodiment. - A sheet post-processing device of an embodiment has a first tray, outlet rollers, and a control section. The first tray holds sheets for post-processing with respect to the sheets supplied from an image forming device. The outlet rollers discharge the sheet to the first tray. The control section controls a rotational speed of the outlet rollers to be decelerated after a leading end portion of the sheet passes through the outlet rollers and before the leading end portion of the sheet comes into contact with the first tray.
- Hereinafter, an image forming system including the image forming device and the sheet post-processing device of the embodiment will be described with reference to the drawings.
-
FIG. 1 is a view illustrating an entire configuration example of an image forming system 1 of an embodiment.FIG. 2 is a block diagram illustrating a functional configuration example of the image forming system 1 illustrated inFIG. 1 . The image forming system 1 includes animage forming device 2 and asheet post-processing device 3. Theimage forming device 2 forms an image on a sheet-shaped medium (hereinafter, referred to as “sheet”) such as paper. Thesheet post-processing device 3 post-processes the sheets transported from theimage forming device 2. - The
image forming device 2 includes acontrol panel 11, ascanner 12, aprinter 13, asheet feeding section 14, asheet discharge section 15, and an image formingcontrol section 16. Thecontrol panel 11 includes various keys for receiving operations of a user. For example, thecontrol panel 11 receives an input related to types of post-processing of the sheets. Thecontrol panel 11 transmits information (including information related to types of the sheets) related to the types of input post-processing to thesheet post-processing device 3. - The
scanner 12 includes a reading section for reading image information of a copy object. Thescanner 12 transmits the read image information to theprinter 13. Theprinter 13 forms an output image (hereinafter, referred to as “toner image”) by developer such as toner based on image information transmitted from thescanner 12 or an external device. Theprinter 13 transfers the toner image on a surface of the sheet. Theprinter 13 fixes the toner image onto the sheet by applying heat and pressure to the toner image that is transferred to the sheet. Thesheet feeding section 14 supplies the sheets to theprinter 13 one by one in accordance with timing when theprinter 13 forms the toner image. Thesheet discharge section 15 transports the sheet discharged from theprinter 13 to thesheet post-processing device 3. - The image forming
control section 16 controls an entire operation of theimage forming device 2. That is, the image formingcontrol section 16 controls thecontrol panel 11, thescanner 12, theprinter 13, thesheet feeding section 14, and thesheet discharge section 15. The image formingcontrol section 16 is formed of a control circuit including a CPU, a ROM, and a RAM. - Next, the
sheet post-processing device 3 will be described. - First, an entire configuration of the
sheet post-processing device 3 will be described. As illustrated inFIG. 1 , thesheet post-processing device 3 is disposed adjacent to theimage forming device 2. Thesheet post-processing device 3 executes post-processing that is designated through thecontrol panel 11 on the sheets transported from theimage forming device 2. For example, post-processing is stapling or sorting. Thesheet post-processing device 3 includes astandby section 21, aprocessing section 22, adischarge section 23, and thepost-processing control section 24. - The
standby section 21 causes the sheet S (seeFIG. 3 ) transported from theimage forming device 2 to temporarily stay (buffer). For example, thestandby section 21 causes a following plurality of sheets S to be on standby during post-processing of a preceding sheet S performed by theprocessing section 22. Thestandby section 21 is provided above theprocessing section 22. Thestandby section 21 drops the staying sheet S to theprocessing section 22, for example, by retreating from above theprocessing section 22 if the sheet of theprocessing section 22 is discharged to thedischarge section 23. - The
processing section 22 performs post-processing in the sheets S. For example, theprocessing section 22 aligns the plurality of sheets S. Theprocessing section 22 performs stapling in the plurality of aligned sheets S. Therefore, the plurality of sheets S are bound together. Theprocessing section 22 discharges the post-processed sheets S to thedischarge section 23. Thedischarge section 23 includes a fixedtray 23 a and amovable tray 23 b. The fixedtray 23 a is provided in an upper portion of thesheet post-processing device 3. Themovable tray 23 b is provided in a side portion of thesheet post-processing device 3. The sorting sheets S are discharged to the fixedtray 23 a and themovable tray 23 b. - The
post-processing control section 24 controls an entire operation of thesheet post-processing device 3. That is, thepost-processing control section 24 controls thestandby section 21, theprocessing section 22, and thedischarge section 23. In addition, as illustrated inFIG. 2 , thepost-processing control section 24 controls aninlet roller 32 a, anoutlet roller 33 a, and apaddle section 34 described below. Thepost-processing control section 24 is formed of a control circuit including a CPU, a ROM, and a RAM. - Next, a configuration of each section of the
sheet post-processing device 3 in the first embodiment will be described.FIG. 3 is a view schematically illustrating a configuration of thesheet post-processing device 3 of the first embodiment. As illustrated inFIG. 3 , thesheet post-processing device 3 has atransport path 31 of the sheet S, a pair of theinlet rollers outlet rollers standby section 21, thepaddle section 34, and theprocessing section 22. - Moreover, in the present specification, “sheet transporting direction” refers to a transporting direction D (entering direction of the sheet S to the standby tray 41) of the sheet S with respect to the
standby tray 41 of thestandby section 21. In addition, in the present specification, “upstream side” and “downstream side” respectively refer to an upstream side and a downstream side in the sheet transporting direction D. In addition, in the present specification, “leading end portion” and “trailing end portion” respectively refer to “end portion on the downstream side” and “end portion of the upstream side” in the transporting direction D. Furthermore, in the present specification, a direction that is substantially parallel to an upper surface (transport surface) of thestandby tray 41 and is substantially orthogonal to the sheet transporting direction D refers to a sheet width direction W. - The
transport path 31 is provided on the inside of thesheet post-processing device 3. Thetransport path 31 has asheet supply port 31 p and asheet discharge port 31 d. Thesheet supply port 31 p faces theimage forming device 2. The sheet S is supplied from theimage forming device 2 to thesheet supply port 31 p. On the other hand, thesheet discharge port 31 d is positioned in the vicinity of thestandby section 21. The sheet S passing through thetransport path 31 is discharged from thesheet discharge port 31 d onto thestandby tray 41 of thestandby section 21. - The
inlet rollers sheet supply port 31 p. Theinlet rollers sheet supply port 31 p toward the downstream side of thetransport path 31. For example, theinlet rollers sheet supply port 31 p to theoutlet rollers inlet sensor 35 is provided in the vicinity of theinlet roller 32 a and detects the sheet S passing through thesheet supply port 31 p. Theinlet sensor 35 outputs a detection signal of a high level, for example, when detecting the sheet S and outputs a detection signal of a low level when not detecting the sheet S. - The
outlet rollers sheet discharge port 31 d. Theoutlet rollers inlet rollers outlet rollers sheet discharge port 31 d to thestandby section 21. Anoutlet sensor 36 is provided in the vicinity of theoutlet roller 33 a and detects the sheet S passing through thesheet discharge port 31 d. Theoutlet sensor 36 outputs a detection signal of a high level, for example, when detecting the sheet S and outputs a detection signal of a low level when not detecting the sheet S. - Next, the
standby section 21 will be described. Thestandby section 21 has the standby tray (buffer tray) 41, atransport guide 43, anddischarge rollers standby tray 41 is an example of “second tray”. A rear end portion of thestandby tray 41 is positioned in the vicinity of theoutlet rollers standby tray 41 overlaps the plurality of sheets S to be on standby when post-processing is performed by theprocessing section 22. Thestandby tray 41 has abottom wall 45 supporting the sheet S from below. Thebottom wall 45 is configured of, for example, two plate-shaped members in parallel to the sheet transporting direction. The two plate-shaped members hold the sheet S on plate surfaces thereof. The two plate-shaped members drop the held sheet S on aprocessing tray 61 by retreating to be divided in the rightward and leftward direction perpendicular to the sheet transporting direction. - The
paddle section 34 is provided between thestandby tray 41 and theprocessing tray 61. Thepaddle section 34 presses the sheet S toward theprocessing tray 61 by rotating if the sheet S is transported from thestandby tray 41 to theprocessing tray 61. Furthermore, thepaddle section 34 transports the sheet S dropped on theprocessing tray 61 to astapler 62 described below. Thepaddle section 34 has arotary shaft 49, arotary body 50, a plurality offirst paddles 51, and a plurality ofsecond paddles 52. - Next, the
processing section 22 will be described. Theprocessing section 22 has theprocessing tray 61, thestapler 62,transport rollers transport belt 64. Theprocessing tray 61 is an example of “first tray”. Theprocessing tray 61 is provided below thestandby tray 41. The plurality of sheets S transported to theprocessing tray 61 are aligned in the sheet width direction W and the sheet transporting direction D by an alignment plate and the like. Thestapler 62 is provided in an end portion of theprocessing tray 61. Thestapler 62 performs stapling (stitching) in a bundle of a predetermined number of the sheets S positioned on theprocessing tray 61. - The
transport rollers transport belt 64 is stretched between thetransport rollers transport belt 64 is rotated in synchronization with thetransport rollers transport belt 64 transports the sheet S between thestapler 62 and thedischarge section 23. - The
post-processing control section 24 of thesheet post-processing device 3 controls the transport speed of the sheet S by controlling a rotational speed of theoutlet rollers processing tray 61. Hereinafter, the control of the transport speed of the sheet S in thepost-processing control section 24 in the first embodiment will be described. Moreover, as a premise of performing the control of the transport speed of the sheet S in the first embodiment, the sheet S is assumed to be in a state of being directly discharged to theprocessing tray 61 without passing through thestandby tray 41. -
FIG. 4 is a block diagram illustrating functional blocks related to the control of the transport speed of the sheet S in thepost-processing control section 24. As illustrated inFIG. 4 , thepost-processing control section 24 includes acommunication section 241, a sheetinformation acquisition section 242, a sensorinformation acquisition section 243, and arotation control section 244. - The
communication section 241 performs communication with thecontrol panel 11 of theimage forming device 2. The sheetinformation acquisition section 242 acquires information related to a type of post-processing input from thecontrol panel 11 via thecommunication section 241 and information related to a type of the sheet S on which post-processing is performed. The information related to the type of the sheet S includes information (information of A4, A3, and the like) related to the size of the sheet S, information related to a basis weight of the sheet S, information related to a material of the sheet S, and the like. The basis weight of the sheet S is a weight of the sheet S per square meter (g/m2). - The sensor
information acquisition section 243 acquires a detection signal according to the detection of the sheet S passing through thesheet discharge port 31 d from theoutlet sensor 36. In the following description, the detection signal of the high level indicating detection of the sheet S is referred to as an ON signal and the detection signal of the low level indicating no detection of the sheet S is referred to as an OFF signal. Therotation control section 244 sets the first speed and the second speed that are the transport speeds of the sheet S based on the information related to the sheet S that is the transport object acquired by the sheetinformation acquisition section 242. Therotation control section 244 controls the transport speed of the sheet S based on the detection signal and the information related to the sheet S acquired by the sensorinformation acquisition section 243. - The
rotation control section 244 controls the rotational speed of a driving motor rotating theoutlet rollers rotation control section 244 controls the transport speed of the sheet S by controlling the rotational speed of theoutlet rollers rotation control section 244 sets the first speed to a v1 (pps) and sets the second speed of the sheet S to a v2 (pps), for example, based on the information related to the sheet S. The first speed=v1 (pps) and the second speed S=v2 (pps) of the sheet are an example and therotation control section 244 can set arbitrary values according to the size and the basis weight of the sheet S. - The transport speeds of the sheet S are the first speed that is a speed for transporting the sheet S in the
transport path 31 and the second speed (first speed>second speed) that is a speed suitable for discharging the sheet S to theprocessing tray 61. The speed suitable for discharging the sheet S to theprocessing tray 61 is a speed at which the discharged sheet S lands on a predetermined position of theprocessing tray 61. That is, thepost-processing control section 24 controls the sheet S so that the sheet S is transported in the transport path at the first speed or the second speed. Therotation control section 244 decelerates the transport speed before the leading end portion of the sheet S colliding with theprocessing tray 61 based on timing when the detection signal becomes the ON signal and the size of the sheet S. The timing when the detection signal becomes the ON signal is timing when the leading end portion of the sheet S passes through thesheet discharge port 31 d. Before the leading end portion of the sheet S collides with theprocessing tray 61 refers to a period after the leading end portion of the sheet S passes through thesheet discharge port 31 d and before the sheet S comes into contact with theprocessing tray 61. - It is possible to predict that the leading end portion of the sheet S collides with the
processing tray 61 when the leading end portion of the sheet S is transported how much from thesheet discharge port 31 d based on the size and the basis weight of the sheet S, the distance from thesheet discharge port 31 d to theprocessing tray 61, and the like. Here, a transport amount from thesheet discharge port 31 d to immediately before the leading end portion of the sheet S colliding with theprocessing tray 61 is a first transport amount. Therotation control section 244 monitors the transport amount of the sheet S from a time point when the leading end portion of the sheet S passes through thesheet discharge port 31 d and performs deceleration at a time point when the sheet S is transported by the first transport amount. Therotation control section 244 also sets the first transport amount based on the information related to the sheet S when setting the first speed and the second speed. - Next, a control operation of the transport speed of the sheet S in the
post-processing control section 24 of thesheet post-processing device 3 will be described.FIG. 5 is a flowchart illustrating a control operation example of the transport speed of the sheet S in thepost-processing control section 24 of thesheet post-processing device 3. - The sheet
information acquisition section 242 acquires the information related to the type of post-processing and the information related to the type of the sheet S to which post-processing is performed (ACT11). Therotation control section 244 sets the first speed and the second speed that are the transport speeds of the sheet S, and the first transport amount based on the information related to the sheet S that is the transport object acquired by the sheet information acquisition section 242 (ACT12). Thesheet post-processing device 3 transports the sheet S at the first speed if the sheet S is supplied to thesheet supply port 31 p (ACT13). Specifically, thepost-processing control section 24 controls the rotational speed of theinlet rollers outlet rollers - The
rotation control section 244 determines whether or not the ON signal is acquired from theoutlet sensor 36 by the sensor information acquisition section 243 (ACT14). Here, if it is determined that the ON signal is not acquired (NO of ACT14), therotation control section 244 performs the process of ACT14 again. If it is determined that the ON signal is acquired (YES of ACT14), therotation control section 244 determines whether or not the sheet S is transported by the first transport amount after the sheet S passes through thesheet discharge port 31 d (ACT15). - If it is determined that the sheet S is not transported by the first transport amount (NO of ACT15), the
rotation control section 244 performs the process of ACT15 again. If it is determined that the sheet S is transported by the first transport amount (YES of ACT15), therotation control section 244 decelerates the transport speed of the sheet S from the first speed to the second speed (=v2 (pps)) (ACT16). Therefore, the speed when the sheet S collides with theprocessing tray 61 is reduced and it is possible to prevent generation of buckling of the sheet S due to the collision. - The
rotation control section 244 determines whether or not the sensorinformation acquisition section 243 acquires the OFF signal from the outlet sensor 36 (ACT17). Here, if it is determined that the OFF signal is not acquired (NO of ACT17), therotation control section 244 performs the process of ACT17 again. If it is determined that the OFF signal is acquired (YES of ACT17), therotation control section 244 stops the driving motor of theoutlet rollers - The control operation of the transport speed of the sheet S in the
post-processing control section 24 described above is described compared to a control operation in the related art.FIG. 6 is a diagram comparing the control operation of the transport speed of the sheet S in thepost-processing control section 24 to the control operation in the related art. - The sheet post-processing device of the related art decelerates the speed of the sheet from a first transport speed (corresponding to the first speed in the first embodiment) to a second transport speed (corresponding to the second speed in the first embodiment) at a time t3 elapsed a period T1 after the ON signal of the outlet sensor is detected at a time t1. The time t3 is timing before (before the trailing end portion of the sheet passes through a sheet discharge port) the outlet sensor outputs the OFF signal. Even if the sheet is decelerated in the timing, the sheet may be buckled due to the following reasons.
- If the leading end portion of the sheet from the sheet discharge port comes into contact with the processing tray, the transport of the sheet is obstructed by friction between the sheet and the processing tray. That is, the transport speed of the leading end portion of the sheet is decreased due to the friction with the processing tray. In this state, if the sheet is transported at a highspeed (first transport speed), a speed difference of the transport speeds of the leading end portion of the sheet and the trailing end portion thereof is increased. Therefore, buckling is likely to occur in the sheet.
- On the other hand, the
sheet post-processing device 3 in the first embodiment decelerates the speed of the sheet from the first speed to the second speed at a time t2 elapsed a period T2 after the ON signal of the outlet sensor is detected at the time t1. The time t2 is timing elapsed the period T2 that is a time required to transport the sheet S from the time t1 by the first transport amount described above. Moreover, control in which the outlet sensor issues the OFF signal at the time t4, and the driving motor rotating theoutlet rollers - As described above, the sheet post-processing device of the related art completes the deceleration from the first transport speed to the second transport speed in the vicinity of the exit of the trailing end of the sheet from the outlet rollers after the leading end portion of the sheet comes into contact with the processing tray. Therefore, the sheet collides with the processing tray at the first transport speed that is a high speed and thereafter, a behavior of the sheet transported at the first transport speed until exiting the outlet rollers is not stable due to buckling and the like. On the other hand, the
sheet post-processing device 3 of the first embodiment completes the deceleration of the transport speed of the sheet S discharged to theprocessing tray 61 from the first speed to the second speed before the leading end portion of the sheet S comes into contact with theprocessing tray 61. Therefore, thesheet post-processing device 3 can suppress the occurrence of the buckling of the sheet S when coming into contact with theprocessing tray 61. If the occurrence of the buckling of the sheet S is suppressed, thereafter, aligning and the like in thepaddle section 34 are stable and accuracy of vertical alignment of the sheets S is improved. - The
post-processing control section 24 of thesheet post-processing device 3 may control the transport speed of the sheet S in a multistage manner. Hereinafter, as a modification example of the first embodiment, the control of the transport speed of the sheet S in the multistate in apost-processing control section 24 will be described. Arotation control section 244 sets a third speed in addition to the first speed and the second speed based on information related to the sheet S. The third speed is a value (first speed>third speed>second speed) that is less than the first speed and greater than the second speed. The third speed is preferably the fastest speed in a range in which the sheet S is not buckled when the sheet S comes into contact with aprocessing tray 61 and is, for example, v3 (pps). - The
rotation control section 244 performs deceleration to the third speed at a time point when the sheet S is transported by the first transport amount after the leading end portion of the sheet S passes through thesheet discharge port 31 d. - Here, a transport amount until immediately before the trailing end portion of the sheet S passes through the
sheet discharge port 31 d is referred to as a second transport amount. Therotation control section 244 performs the deceleration from the third speed to the second speed at a time point when the sheet S is transported by the second transport amount after the leading end portion of the sheet S passes through thesheet discharge port 31 d. Therotation control section 244 also sets the first transport amount and the second transport amount based on information related to the sheet S when setting the first speed, the second speed, and the third speed. - Next, a control operation of the transport speed of the sheet S in the
post-processing control section 24 of thesheet post-processing device 3 will be described.FIG. 7 is a flowchart illustrating an operation example for controlling the transport speed of the sheet S in the multistage manner in thepost-processing control section 24 of thesheet post-processing device 3. Moreover, inFIG. 7 , the same reference numerals are given to the same processes inFIG. 6 and the description will be simplified or omitted. - Following the process of ACT11 to ACT14, the
rotation control section 244 determines whether or not the sheet S is transported by the first transport amount after the sheet S passes through thesheet discharge port 31 d (ACT15). If it is determined that the sheet S is not transported by the first transport amount (NO of ACT15), therotation control section 244 performs the process of ACT15 again. - If it is determined that the sheet S is transported by the first transport amount (YES of ACT15), the
rotation control section 244 decelerates the transport speed of the sheet S from the first speed to the third speed (=v3 (pps)) (ACT71). Therefore, the speed of the sheet S is reduced when colliding with theprocessing tray 61 and it is possible to prevent the occurrence of the buckling of the sheet S due to the collision. - The
rotation control section 244 determines whether or not the sheet S is transported by the second transport amount after the sheet S passes through thesheet discharge port 31 d (ACT72). If it is determined that the sheet S is not transported by the second transport amount (NO of ACT72), therotation control section 244 performs the process of ACT72 again. - If it is determined that the sheet S is transported by the second transport amount (YES of ACT72), the
rotation control section 244 decelerates the transport speed of the sheet S from the third speed to the second speed (=v2 (pps)) (ACT73). Since the following processes ACT17 and ACT18 are the same as the processes illustrated inFIG. 5 , the description will be omitted. - Next, change timing of the transport speed of the sheet S in the multistage manner will be described based on a timing chart.
FIG. 8 is a diagram describing the control operation of the transport speed of the sheet S in the multistage manner in thepost-processing control section 24. - The
sheet post-processing device 3 in modification example of the first embodiment decelerates the speed of the sheet from the first speed to the third speed at the time t2 elapsed the period T2 after the ON signal of the outlet sensor is detected at the time t1. The time t2 is timing elapsed the period T2 that is a time required to transport the sheet S from the time t1 by the first transport amount described above. - The
sheet post-processing device 3 decelerates the speed of the sheet S from the third speed to the second speed at a time t6 elapsed a period T3 from the time t1. The time t6 is timing elapsed the period T3 that is a time required to transport the sheet S from the time t1 by the second transport amount. Moreover, the control in which the outlet sensor issues the OFF signal in the time t4 and the driving motor rotating theoutlet rollers FIG. 6 . - The
sheet post-processing device 3 that is a modification example of the first embodiment can shorten a time until the discharge of the sheet S is completed in addition to the advantages described above in the first embodiment. - The
sheet post-processing device 3 of the first embodiment described above is configured to control the transport speed of the sheet S when the sheet S is directly discharged to theprocessing tray 61 without passing through thestandby tray 41. Asheet post-processing device 3 of a second embodiment controls the transport of the sheet S when the sheet S is directly discharged to thestandby tray 41 in addition to the function of thesheet post-processing device 3 of the first embodiment. - For example, if five sheets S are processed in a staple mode, after initial three sheets S are once held in the
standby tray 41, thesheet post-processing device 3 drops the sheets S on theprocessing tray 61. Thereafter, thesheet post-processing device 3 directly discharges fourth and fifth sheets S to theprocessing tray 61. In such an operation mode, thesheet post-processing device 3 of the second embodiment performs transporting of the fourth and fifth sheets S by the control described in the first embodiment. Then, thesheet post-processing device 3 of the second embodiment performs transporting of the initial three sheets S by control described in the second embodiment that is described below. - Moreover, an entire configuration of an image forming system 1 including the
sheet post-processing device 3 of the second embodiment is the same as the configuration ofFIG. 1 . A functional configuration of the image forming system 1 including thesheet post-processing device 3 of the second embodiment is the same as the configuration ofFIG. 2 . -
FIG. 9 is a view schematically describing a configuration of thesheet post-processing device 3 in the second embodiment. Moreover, inFIG. 9 , the same references are given to the same configuration elements asFIG. 3 and the description will be simplified or omitted. Thesheet post-processing device 3 illustrated inFIG. 9 is different from thesheet post-processing device 3 illustrated inFIG. 3 that acorrugation cam 37 is further included. Thecorrugation cam 37 is a cam that presses, for example, a center of the sheet S in a width W direction transported along thetransport guide 43. Thecorrugation cam 37 causes a shape of a pressed portion of the sheet S to be a recessed arc shape by pressing the sheet Sand imparts rigidity with respect to the sheet S. Therefore, the rigidity of the sheet S is increased in a direction parallel to the transporting direction D. - The
corrugation cam 37 illustrated inFIG. 9 has a fan-shaped form and rotates around the pivot of the fan shape as illustrated inFIG. 10 . Thecorrugation cam 37 illustrated inFIG. 9 is retreated above from thetransport guide 43 and is not functioning.FIG. 10 is a view illustrating a state in which thecorrugation cam 37 is functioning. Moreover, since each reference numeral inFIG. 10 is the same as that ofFIG. 9 , the description will be omitted. - As illustrated in
FIG. 10 , thecorrugation cam 37 protrudes below thetransport guide 43 by rotating in the counterclockwise direction. Therefore, a protruded portion of thecorrugation cam 37 presses, for example, substantially the center of the width of the sheet S transported along thetransport guide 43. -
FIG. 11 is a block diagram illustrating functional blocks related to the control of the transport of the sheet S discharged to astandby tray 41 in thepost-processing control section 24. InFIG. 11 , the same numerals are given to the configurations having the same function asFIG. 4 and the description will be omitted. - As illustrated in
FIG. 11 , thepost-processing control section 24 includes acommunication section 241, a sheetinformation acquisition section 242, a sensorinformation acquisition section 243, arotation control section 244 a, and aposture control section 245. Therotation control section 244 a controls the transport of the sheet S discharged to thestandby tray 41 in addition to the function of therotation control section 244 illustrated inFIG. 3 . Theposture control section 245 determines whether or not thecorrugation cam 37 is functioning and controls thecorrugation cam 37 based on information related to the sheet S of the transport object acquired by the sheetinformation acquisition section 242. Thecorrugation cam 37 is in a state of functioning illustrated inFIG. 10 or a state of not functioning illustrated inFIG. 9 depending on the control from theposture control section 245. Theposture control section 245 causes thecorrugation cam 37 to function if the sheet S of the transport object is equal to or greater than a predetermined size and causes thecorrugation cam 37 to do not function if the sheet S of the transport object is less than the predetermined size. Rigidity of paper having a large size becomes low as a distance transported from theoutlet rollers corrugation cam 37, the rigidity is increased and it is possible to hold the rigidity of the sheet S even if the distance existing from theoutlet rollers - The
rotation control section 244 a can predict whether the leading end portion of the sheet S reaches thedischarge rollers sheet discharge port 31 d based on the size and the basis weight of the sheet S, distance from thesheet discharge port 31 d to thedischarge rollers discharge rollers sheet discharge port 31 d is referred to as a third transport amount. Here, a transport amount until the leading end portion of the sheet S equal to or greater than the predetermined size reaches thedischarge rollers sheet discharge port 31 d is referred to as a fourth transport amount. The rigidity of the sheet S equal to or greater than the predetermined size is imparted by thecorrugation cam 37. Thus, the sheet S reaches thedischarge rollers - That is, the
rotation control section 244 a performs transport of the sheet S smaller than the predetermined size by the third transport amount after the trailing end portion of the sheet S exits thesheet discharge port 31 d. Therotation control section 244 a performs transport of the sheet S equal to or greater than the predetermined size by the fourth transport amount after the trailing end portion of the sheet S exits thesheet discharge port 31 d. Therotation control section 244 a can stabilize the positions (buffer positions) of the plurality of sheets S held in thestandby tray 41 by changing the transport amount with the size of the sheet S as described above. - The
rotation control section 244 a monitors the transport amount of the sheet S after a time point when the trailing end portion of the sheet S passes through thesheet discharge port 31 d and transports the sheet S by the third transport amount or the fourth transport amount depending on the size of the sheet S. -
FIG. 12 is a flowchart illustrating an operation example of control of a transport amount of the sheet S on thestandby tray 41 in thepost-processing control section 24 of the second embodiment. - The sheet
information acquisition section 242 acquires information related to the type of post-processing and information related to the type of the sheet S to which post-processing is performed (ACT21). Therotation control section 244 a sets the third transport amount or the fourth transport amount as the transport amount of the sheet S based on information related to the sheet S of the transport object acquired by the sheet information acquisition section 242 (ACT22). Thesheet post-processing device 3 transports the sheet S to thestandby tray 41 at the first speed if the sheet S is supplied to thesheet supply port 31 p (ACT23). - The
rotation control section 244 a determines whether or not the sensorinformation acquisition section 243 acquires the OFF signal from the outlet sensor 36 (ACT24). If it is determined that the OFF signal is not acquired (NO of ACT24), therotation control section 244 a performs the process of ACT24 again. If it is determined that the OFF signal is acquired (YES of ACT24), therotation control section 244 a determines whether or not the size of the sheet S is equal to or greater than the predetermined size (ACT25). Here, if it is determined that the size of the sheet S is less than the predetermined size (NO of ACT25), therotation control section 244 a transports the sheet S with the third transport amount (ACT27). If it is determined that the size of the sheet S is equal to or greater than the predetermined size (YES of ACT25), therotation control section 244 a transports the sheet S with the fourth transport amount (ACT26). Therotation control section 244 a completes the transport process with respect to the sheet S if the process of ACT26 or ACT27 is completed. - Next, a change of the transport amount of the sheet S will be described based on a timing chart.
FIG. 13 is a timing chart describing a control operation the transport amount of the sheet S in thepost-processing control section 24 of the second embodiment. InFIG. 13 , a timing chart in an upper portion is a timing chart in a case in which the size of the sheet S is less than the predetermined size. A timing chart in a lower portion is a timing chart in a case in which the size of the sheet S is equal to or greater than the predetermined size. - First, the timing chart in the upper portion will be described. The
rotation control section 244 a in the second embodiment stops the transport of the sheet S at a time t13 elapsed a period T4 after the OFF signal of the outlet sensor is detected at a time t11. The time t13 is timing elapsed the period T4 that is a time required to transport the sheet S from the time t11 by the third transport amount described above. - Next, the timing chart in the lower portion will be described. The
rotation control section 244 a in the second embodiment stops the transport of the sheet S at a time t12 elapsed a period T5 after the OFF signal of the outlet sensor is detected at a time t11. The time t12 is timing elapsed the period T5 that is a time required to transport the sheet S from the time t11 by the fourth transport amount described above. - As is apparent by comparing the period T4 and the period T5 described above, in the
rotation control section 244 a, the transport amount to be transported is shorter in a case in which the size of the sheet S is equal to or greater than the predetermined size than in a case in which the size of the sheet S is less than the predetermined size. That is, in therotation control section 244 a, the transport amount to be transported is shortened in the case in which the size of the sheet S is equal to or greater than the predetermined size compared to the case in which the size of the sheet S is less than the predetermined size. Therotation control section 244 a in the second embodiment can suppress variation of the rear end position of the sheet S and stabilize the rear end position of the sheet S due to a difference in the transport path for each size of the sheet S by causing the transport amount of the sheet S to be adjusted on thestandby tray 41. Therefore, thesheet post-processing device 3 in the second embodiment can stabilize the buffer position by thestandby tray 41 and then can also stabilize drop of the sheet onto theprocessing tray 61. - According to at least one embodiment described above, the
sheet post-processing device 3 can suppress occurrence of the buckling of the sheet S when coming into contact with theprocessing tray 61. - While certain embodiments have been described these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms: furthermore various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the invention.
Claims (6)
Priority Applications (1)
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US15/919,277 US20180201461A1 (en) | 2016-04-12 | 2018-03-13 | Sheet post-processing device |
Applications Claiming Priority (2)
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US15/096,342 US9932191B2 (en) | 2016-04-12 | 2016-04-12 | Sheet post-processing device |
US15/919,277 US20180201461A1 (en) | 2016-04-12 | 2018-03-13 | Sheet post-processing device |
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US15/096,342 Continuation US9932191B2 (en) | 2016-04-12 | 2016-04-12 | Sheet post-processing device |
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US20180201461A1 true US20180201461A1 (en) | 2018-07-19 |
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US15/096,342 Active 2036-04-21 US9932191B2 (en) | 2016-04-12 | 2016-04-12 | Sheet post-processing device |
US15/919,277 Abandoned US20180201461A1 (en) | 2016-04-12 | 2018-03-13 | Sheet post-processing device |
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US15/096,342 Active 2036-04-21 US9932191B2 (en) | 2016-04-12 | 2016-04-12 | Sheet post-processing device |
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JPS61111266A (en) * | 1984-11-01 | 1986-05-29 | Fuji Xerox Co Ltd | Paper discharge device |
US5181705A (en) * | 1988-06-23 | 1993-01-26 | Canon Kabushiki Kaisha | Sheet discharging device that chooses a sheet discharging speed according to the sheet's length or rigidity |
US5478065A (en) * | 1993-10-28 | 1995-12-26 | Nisca Corporation | Document feeding apparatus with ejecting means partly associated with transferring means |
JPH11255395A (en) * | 1999-01-14 | 1999-09-21 | Nisca Corp | Sheet conveying apparatus |
US20030057632A1 (en) * | 2001-08-23 | 2003-03-27 | Shunsuke Nishimura | Sheet processing apparatus and image forming system having the same |
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US4121187A (en) * | 1977-06-21 | 1978-10-17 | A. B. Chance Company | High speed ratio, dual fuse link |
JPS61178363A (en) * | 1985-01-30 | 1986-08-11 | Sharp Corp | Paper discharge control device for automatic document feeding device |
US5215300A (en) * | 1985-03-15 | 1993-06-01 | Canon Kabushiki Kaisha | Tray apparatus |
JPS62244864A (en) * | 1986-04-17 | 1987-10-26 | Totani Giken Kogyo Kk | Sheet material accumulating device |
JP4371960B2 (en) * | 2004-09-06 | 2009-11-25 | キヤノン株式会社 | Image forming apparatus |
JP4291243B2 (en) | 2004-09-28 | 2009-07-08 | 東芝テック株式会社 | Sheet post-processing device |
US8408544B2 (en) * | 2011-06-08 | 2013-04-02 | Eastman Kodak Company | Sorting by controlling scanned document velocity |
US8844927B2 (en) | 2011-06-30 | 2014-09-30 | Kabushiki Kaisha Toshiba | Sheet loading apparatus, erasing apparatus, and sheet loading method |
US8622390B2 (en) * | 2011-08-29 | 2014-01-07 | Kabushiki Kaisha Toshiba | Sheet processing apparatus and sheet conveying method |
US8991817B1 (en) * | 2014-02-14 | 2015-03-31 | Kabushiki Kaisha Toshiba | Paper conveyance apparatus |
JP2015160742A (en) * | 2014-02-28 | 2015-09-07 | 富士ゼロックス株式会社 | Recording material discharging device and recording material processing device using the same |
JP2016016965A (en) * | 2014-07-10 | 2016-02-01 | キヤノン株式会社 | Sheet processing device and image forming system |
-
2016
- 2016-04-12 US US15/096,342 patent/US9932191B2/en active Active
-
2018
- 2018-03-13 US US15/919,277 patent/US20180201461A1/en not_active Abandoned
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS61111266A (en) * | 1984-11-01 | 1986-05-29 | Fuji Xerox Co Ltd | Paper discharge device |
US5181705A (en) * | 1988-06-23 | 1993-01-26 | Canon Kabushiki Kaisha | Sheet discharging device that chooses a sheet discharging speed according to the sheet's length or rigidity |
US5478065A (en) * | 1993-10-28 | 1995-12-26 | Nisca Corporation | Document feeding apparatus with ejecting means partly associated with transferring means |
JPH11255395A (en) * | 1999-01-14 | 1999-09-21 | Nisca Corp | Sheet conveying apparatus |
US20030057632A1 (en) * | 2001-08-23 | 2003-03-27 | Shunsuke Nishimura | Sheet processing apparatus and image forming system having the same |
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US9932191B2 (en) | 2018-04-03 |
US20170291785A1 (en) | 2017-10-12 |
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