EP3048071A1 - Print sheet transfer device - Google Patents
Print sheet transfer device Download PDFInfo
- Publication number
- EP3048071A1 EP3048071A1 EP16151945.9A EP16151945A EP3048071A1 EP 3048071 A1 EP3048071 A1 EP 3048071A1 EP 16151945 A EP16151945 A EP 16151945A EP 3048071 A1 EP3048071 A1 EP 3048071A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- print sheet
- rollers
- guide plate
- roller
- upstream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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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
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
- B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
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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
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/36—Article guides or smoothers, e.g. movable in operation
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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
- B65H29/20—Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders
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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
- B65H29/52—Stationary guides or smoothers
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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
- B65H29/58—Article switches or diverters
- B65H29/60—Article switches or diverters diverting the stream into alternative paths
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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
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
- B65H5/068—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between one or more rollers or balls and stationary pressing, supporting or guiding elements
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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
- B65H85/00—Recirculating articles, i.e. feeding each article to, and delivering it from, the same machine work-station more than once
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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
- B65H2301/51212—Bending, buckling, curling, bringing a curvature perpendicularly to the direction of displacement of handled material, e.g. forming a loop
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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
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/40—Details of frames, housings or mountings of the whole handling apparatus
- B65H2402/44—Housings
- B65H2402/441—Housings movable for facilitating access to area inside the housing, e.g. pivoting or sliding
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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
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/40—Details of frames, housings or mountings of the whole handling apparatus
- B65H2402/45—Doors
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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
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/60—Coupling, adapter or locking means
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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
- B65H2403/00—Power transmission; Driving means
- B65H2403/70—Clutches; Couplings
- B65H2403/72—Clutches, brakes, e.g. one-way clutch +F204
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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
- B65H2404/10—Rollers
- B65H2404/15—Roller assembly, particular roller arrangement
- B65H2404/153—Arrangements of rollers facing a transport surface
- B65H2404/1531—Arrangements of rollers facing a transport surface the transport surface being a cylinder
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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
- B65H2404/10—Rollers
- B65H2404/16—Details of driving
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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
- B65H2404/61—Longitudinally-extending strips, tubes, plates, or wires
- B65H2404/611—Longitudinally-extending strips, tubes, plates, or wires arranged to form a channel
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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
- B65H2407/00—Means not provided for in groups B65H2220/00 – B65H2406/00 specially adapted for particular purposes
- B65H2407/20—Means not provided for in groups B65H2220/00 – B65H2406/00 specially adapted for particular purposes for manual intervention of operator
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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
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/10—Ensuring correct operation
- B65H2601/11—Clearing faulty handling, e.g. jams
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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
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/30—Facilitating or easing
- B65H2601/32—Facilitating or easing entities relating to handling machine
- B65H2601/321—Access
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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
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/30—Facilitating or easing
- B65H2601/32—Facilitating or easing entities relating to handling machine
- B65H2601/325—Manual handling 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
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/06—Office-type machines, e.g. photocopiers
Definitions
- the present invention relates to a print sheet transfer device used as a unit to transfer a print sheet in, e.g., an image forming apparatus, and more particularly, to a print sheet transfer device capable of, when inconvenience has occurred in transfer timing or when a print sheet has been jammed in a transfer route (so-called paper jam), removing the print sheet from the transfer route with a simple manipulation.
- the apparatuses tend to have complicated and high-density packaged internal structure.
- the print sheet transfer path is often provided in a deep inner part of the apparatus, and surrounded by other devices and constituents.
- the space to insert an operator's hand is extremely limited.
- the print sheet is charged with static electricity by contact charge with the transfer path and is attached to the transfer path. It is very difficult to remove the print sheet.
- Patent Literature 1 indicated below discloses an invention of a print sheet transfer device with a purpose of removal of a jammed print sheet with ease from the print sheet transfer path of the print sheet transfer device.
- a pair of paper conveying rollers 7 are provided on an inner side surface of a jam access cover 2 with which a part of a paper conveying passage 17 is opened to the outside.
- the paper conveying rollers 7 are provided in an inverting section 18 of the paper conveying passage 17 to invert the print sheet transfer direction in an intermediate portion.
- the print sheet transfer roller 7 is configured with a pair of driving roller 3 and driven roller 4.
- the driving roller 3 is provided inside from the driven roller 4 in the print sheet transfer device.
- the operator when an operator peers into the device to check the position of a jammed print sheet, the operator inserts his/her hand in the device to pull out the jammed print sheet from the device.
- the operation is troublesome, and the hand becomes dirty with toner, which is unpleasant for the operator.
- it is possible to pull out jammed print sheet in the print sheet transfer path to the outside by only opening the opening type cover. This simplifies the operation to remove the jammed print sheet upon occurrence of paper jam. Further, it is possible to comfortably perform the operation without getting the operator's hand dirty.
- Patent Literature 1 According to the invention of the print sheet transfer device disclosed in Patent Literature 1 indicated above, it is possible to comparatively easily remove a jammed print sheet in a portion where the jam access cover to open a part of the print sheet transfer path can be provided.
- the jam access cover in correspondence with many positions of the print sheet transfer path.
- many image forming apparatuses having the print sheet transfer device have a structural problem that there is no room for the special structure to open a part of the print sheet transfer path along with the print sheet conveying roller to the outside. Accordingly, in the structure of Patent Literature 1 described above, it is difficult to easily remove a jammed print sheet and all the print sheets existing in the print sheet transfer path upon occurrence of paper jam with a hand.
- the present invention has been made in view of the conventional technique and its problem, and aims to enable, in a print sheet transfer device, removal of a print sheet jammed in the print sheet transfer path and other print sheets staying in the print sheet transfer path upon occurrence of paper jam, easily with a hand.
- a print sheet transfer device including: an upstream roller that conveys a print sheet; a downstream roller that conveys the print sheet; a guide plate, provided between the upstream roller and the downstream roller, that is movable between a guide position to guide the print sheet and a release position to release the print sheet; a first interlocking mechanism that rotates at least one of the upstream roller and the downstream roller in accordance with an operation to move the guide plate from the guide position to the release position, to form a sag in the print sheet between the upstream roller and the downstream roller, and when the print sheet is transferred, does not transmit rotation of the upstream roller and the downstream roller to the guide plate.
- the first interlocking mechanism rotates the upstream roller in a print sheet transfer direction in accordance with the operation to move the guide plate from the guide position to the release position, so as to feed the print sheet in contact with the upstream roller in the transfer direction, to form the sag in the print sheet.
- the first interlocking mechanism rotates the downstream roller in an opposite direction to a print sheet transfer direction in accordance with the operation to move the guide plate from the guide position to the release position, so as to feed the print sheet in contact with the downstream roller in the opposite direction to the transfer direction, to form the sag in the print sheet.
- the print sheet transfer device in the second or third aspect further includes a second interlocking mechanism that rotates the downstream roller or the upstream roller in an opposite direction to a rotational direction of the upstream roller or the downstream roller in accordance with a rotation of the upstream roller or the downstream roller interlocked with the operation to move the guide plate from the guide position to the release position, so as to form the sag in the print sheet, and when the print sheet is transferred, does not transmit the rotation of the upstream roller or the downstream roller to the downstream roller or the upstream roller.
- a second interlocking mechanism that rotates the downstream roller or the upstream roller in an opposite direction to a rotational direction of the upstream roller or the downstream roller in accordance with a rotation of the upstream roller or the downstream roller interlocked with the operation to move the guide plate from the guide position to the release position, so as to form the sag in the print sheet, and when the print sheet is transferred, does not transmit the rotation of the upstream roller or the downstream roller to the downstream roller or the upstream roller.
- the print sheet transfer device in the first aspect of the present invention when the guide plate is moved from the guide position to the release position, at least one of the upstream roller and the downstream roller is rotated in accordance with the movement. Then the print sheet between the upstream roller and the downstream roller is fed, and a sag is formed between the both rollers. Further, upon transfer of the print sheet, the rotation of the upstream roller and the downstream roller is not transmitted to the guide plate, and there is no trouble in print sheet transfer.
- the upstream roller when the guide plate is moved from the guide position to the release position, the upstream roller is rotated in the print sheet transfer direction in accordance with the movement.
- the print sheet in contact with the upstream roller is fed in the transfer direction, and a sag is formed between the upstream roller and the downstream roller which stands still.
- the downstream roller when the guide plate is moved from the guide position to the release position, the downstream roller is rotated in the direction opposite to the print sheet transfer direction in accordance with the movement.
- the print sheet in contact with the downstream roller is fed in the direction opposite to the transfer direction, and a sag is formed between the upstream roller which stands still and the downstream roller.
- the upstream roller when the guide plate is moved from the guide position to the release position, the upstream roller is rotated in the print sheet transfer direction in accordance with the movement.
- the downstream roller is rotated in the direction opposite to the rotation of the upstream roller in accordance with the rotation of the upstream roller.
- a sag is formed in the print sheet between the upstream roller and the downstream roller.
- the downstream roller is rotated in the direction opposite to the print sheet transfer direction in accordance with the movement.
- the upstream roller is rotated in the print sheet transfer direction in accordance with the rotation of the downstream roller.
- the present embodiment relates to an image forming apparatus having a print sheet transfer device.
- a transfer path 3 to guide a print sheet P is set in a casing 2 of an image forming apparatus 1.
- the transfer path 3 has a closed loop-shaped circulation path 7 configured with a horizontal lower path 4 to perform image formation on the print sheet P as a recording medium, a horizontal upper path 5 to reverse the print sheet P in which image formation has been made on its front surface and return the print sheet P to the lower path 4, and two connection paths 6 connecting respective both ends of the lower path 4 and the upper path 5.
- the print sheet P is subjected to image formation in the middle of transfer in the circulation path 7 in a counterclockwise direction in the figure.
- a paper feeding section 8 to feed the print sheet P is connected to the upstream side of the lower path 4 in the transfer path 3.
- the paper feeding section 8 is configured to feed the top print sheet P, among the print sheets P stacked on a paper feed table, vertically movable with an unshown mechanism, into the lower path 4.
- a belt transfer mechanism 9 as a conveyance section is provided on the lower side of a central portion of the lower path 4.
- the belt transfer mechanism 9 has a belt 10 which has a large number of unshown holes and which is circulate-driven, and a suction part 11 which sucks air downward from the holes of the belt 10 moving on the upper side to suck the print sheet P to the upper surface of the belt 10. It is possible to transfer the print sheet P, in a state where it is sucked to the upper surface of the belt 10, along the lower path 4.
- Rollers 20 for transfer as a transfer section for the print sheet P, are provided at arbitrary intervals at both ends of the lower path 4, the upper path 5 and the two connection paths 6, corresponding to both sides of the belt transfer mechanism 9.
- the print sheet P is transferred along these respective paths 4, 5 and 6 (7).
- the rollers 20 are provided along the circulation path 7 in this manner, and in addition, are provided at arbitrary intervals in a paper discharge path and a switchback path branched from the circulation path 7 as described later.
- An image forming section 30 is provided above the belt transfer mechanism 9 on the lower path 4.
- the image forming section 30 is a device having four ink-jet devices to discharge K (black) ink, C (cyan) ink, M (magenta) ink and Y (yellow) ink arrayed along a transfer direction of the print sheet P. It is possible to form a desired color image by discharging color ink on the upper surface of the print sheet P fed with the belt transfer mechanism 9.
- a paper discharge path 21 provided with the rollers 20 is branched toward a diagonal upward direction on the downstream side of the upper path 5 in the circulation path 7.
- the terminal end of the paper discharge path 21 is connected to a paper discharge table 22 provided in the casing 2.
- the end side (downstream side) of the paper discharge table 22 is raised in a slope shape.
- the print sheet P, where the image has been formed with the image forming section 30 on the upper surface is discharged, in a faced down state (the upper surface is faced down), onto the paper discharge table 22. Further, the print sheet, where images are formed on the both surfaces, is discharged, with its surface first subjected to the image formation faced up, onto the paper discharge table 22.
- a switchback path 25 is branched in the middle of one of the connection paths 6 connecting the downstream side of the upper path 5 and the upstream side of the lower path 4, and slightly on the downstream side from the branching point of the paper discharge path 21.
- the switchback path 25 has a dead-end structure. Although the details are unshown, the rollers 20 are provided in the middle of the path.
- the print sheet P already subjected to image formation and guided from the circulation path 7 to the switchback path 25, is reciprocated in the switchback path 25, then returned to the circulation path 7.
- the printing sheet P in the circulation path 7 is reversed. Accordingly, in this structure, it is possible to perform printing on the both surfaces of one print sheet P by a series of operations.
- an image is formed with the ink-jet device (image forming section) 30 on one surface of the print sheet P while the print sheet P is transferred along the lower path 4 in the circulation path 7. Then, the print sheet P is sent from the upper path 5 into the switchback path 25. The print sheet P is sent backward from the switchback path 25 into the circulation path 7. Thus the print sheet P is reversed. The print sheet is transferred again along the lower path 4 and is passed in the vicinity of the ink-jet device (image forming section) 30, and another image is formed on the other surface of the print sheet P.
- the print sheet P is fed from the paper feeding section 8 into the lower path 4 in the circulation path 7.
- the ink-jet device (image forming section) 30 on the surface of the print sheet P and the print sheet P is discharged to the paper discharge table 22, it is possible to discharge the print sheet with the image forming surface is faced down.
- This is single-sided printing of forming an image on only one surface of the print sheet P.
- the print sheet P with one surface subjected to the image formation is not discharged to the paper discharge table 22 but the print sheet P is guided to the switchback path 25.
- the print sheet P is reversed by being reciprocated in the switchback path 25, and then returned to the circulation path 7.
- the print sheet P is transferred again along the circulation path 7, and an image is formed with the ink-jet device (image forming section) 30, on the rear surface of the print sheet P. It is possible to discharge the print sheet P, with the surface first subjected to the image formation faced up, onto the paper discharge table 22.
- the image forming apparatus 1 has a configuration for removing the print sheet P, when it is jammed in the print sheet transfer device, from the transfer path 3.
- an opening 40 (indicated with a broken line) to access the inner mechanisms is formed in a side plate of the casing 2, i.e., a plate body on the front surface side or rear surface side of the casing 2 provided orthogonally to the drawing surface of the figure.
- the opening 40 is opened or closed with an unshown door.
- the opening 40 and the door are provided in plural positions corresponding to the transfer path 3 for access to the print sheet P in any position of the transfer path 3.
- the opening 40 and the door are provided in the vicinity of a part of the upper path 5 close to the paper discharge path 21.
- Figs. 2 and 3 are perspective diagrams showing the opening 40 (indicated with an alternate long and short dash line) and a part of the print sheet transfer device provided in the casing 2, viewed from the outside through the casing 2 from a diagonal upper position.
- Fig. 4 is a perspective diagram showing a part of the print sheet transfer device viewed through the casing 2 from the front surface side. The opening 40 is not shown. Note that these figures do not show the door to open/close the opening 40.
- the print sheet transfer device has, as a pair of guide plates forming the transfer path 3, an upper first guide plate 41 and a lower second guide plate 42 provided in parallel to each other at a predetermined interval.
- the first guide plate 41 is on the upper side and the second guide plate 42 is on the lower side.
- the reference numerals are assigned merely to show relative positional relation.
- the pair of guide plates are provided as a right side first guide plate and a left side second guide plate, in parallel to each other at a predetermined interval.
- the guide plates are provided in parallel to each other at a predetermined interval as a pair.
- the guide plates are not necessarily provided as a pair.
- the print sheet P may be guide-transferred along a concave surface side of one guide plate.
- This print sheet transfer device has plural rollers 20 for transfer provided along the first guide plate 41 and the second guide plate 42.
- the plural rollers 20 are configured as plural pairs of rollers to transfer the print sheet P held between the rollers.
- Figs. 1 to 3 among the plural pairs of rollers, two pairs of rollers are shown.
- upstream rollers 20a respective rollers 20 of the pairs of rollers 20 on the upstream side with respect to a print sheet transfer direction F
- downstream rollers 20b respective rollers 20 of the pairs of rollers 20 on the downstream side with respect to the print sheet transfer direction F.
- the rollers 20 are provided in pairs. However, even when the rollers 20 are not in pairs, it is possible to transfer the print sheet P. For example, it is possible to transfer the print sheet P while holding the print sheet P between the surface of one guide plate and one roller 20.
- One of two rollers 20 forming a pair is a driving roller, and the other one, a driven roller.
- the two rollers 20 making up a pair are in contact with each other in the position of a through hole 43 formed in one or both of the first guide plate 41 and the second guide plate 42. It is possible to transfer the print sheet P along a gap between the first guide plate 41 and the second guide plate 42 by driving one of the rollers while holding the print sheet P between the rollers.
- the first guide plate 41 on the upper side an edge on the upstream side orthogonal to the print sheet transfer direction F is fixed to a fulcrum shaft 45 via an accouplement 44.
- the fulcrum shaft 45 is rotatable.
- the fulcrum shaft 45 is provided in an adjacent part on the upstream side from the rotary shaft 46 of the upper upstream rollers 20a and is in parallel to the rotary shaft 46 of the upper upstream rollers 20a.
- the first guide plate 41 on the upper side is divided into a downstream first plate body 41a and an upstream second plate body 41b along a parting line parallel to the direction orthogonal to the print sheet transfer direction F.
- the first plate body 41a and the second plate body 41b are rotatably connected with a hinge 47. Accordingly, the upstream second plate body 41b is connected to the fulcrum shaft 45. Further, a jam clear lever 48, projecting to the outside of the casing 2 from the opening 40 from which the door is opened, is attached to a side edge of the first plate body 41a on the downstream side.
- Fig. 2 when an operator holds the jam clear lever 48 with his/her fingers and raises it, then as shown in Fig. 3 , the first guide plate 41 swings upward about the fulcrum shaft 45 while it is bent in an upward-convex shape at the hinge 47, then the entire first guide plate 41 is lifted up away from the second guide plate 42. With this operation, when the print sheet P exists between the first guide plate 41 and the second guide plate 42, it is exposed. Accordingly, the print sheet P is easily removed upon occurrence of paper jam.
- the position of the guide plate when the first guide plate 41 and the second guide plate 42, facing each other at a predetermined interval is referred to as a guide position to guide the print sheet P transferred with the rollers 20.
- the position to lift up the first guide plate 41 by using the jam clear lever 48 to release the print sheet P in the gap between the first guide plate 41 and the second guide plate 42 is referred to as a release position to release the jammed print sheet P. It is possible to move the first guide plate 41 between the relatively lower guide position and the relatively upper release position within about a 90-degree range by manipulation of the jam clear lever 48. It is possible to selectively set the first guide plate 41 in the both positions.
- the jam clear lever 48 is attached to the first plate body 41a only when the door is opened to open the opening 40 and the jam clear lever 48 is used for jam clear.
- the jam clear lever 48 is removed from the first plate body 41a.
- the jam clear lever 48 is slidably attached to the first plate body 41a along the direction orthogonal to the print sheet transfer direction F.
- the jam clear lever 48 is inserted in the casing 2 and accommodated in a position not to interfere with the unshown door. Only when the door is opened to open the opening 40 and the jam clear lever 48 is used for jam clear, it is pulled out to the outside from the opening 40 of the casing 2.
- the first guide plate 41 is rotatable about the fulcrum shaft 45.
- the present print sheet transfer device has a mechanism to rotate the upper side of the upstream rollers 20a in a direction where the print sheet P is transferred in the print sheet transfer direction F in accordance with the rotation of the first guide plate 41, to feed the print sheet P between the upstream rollers 20a and the downstream rollers 20b, to form a sag as shown in Fig. 3 .
- a first interlocking mechanism to form a sag in the print sheet P will be described.
- a first large gear 50 is connected to one end of the fulcrum shaft 45 connected to the first guide plate 41 on the opening 40 side.
- the first large gear 50 is engaged with a first small gear 51.
- the first small gear 51 is connected to the rotary shaft 46 coaxially with a second large gear 52.
- a second small gear 54 is attached via a one-way clutch 53 to the rotary shaft 46 of the upper roller 20 of the upstream rollers 20a.
- the second large gear 52 is engaged with the second small gear 54.
- the one-way clutch 53 between the rotary shaft 46 and the second small gear 54 of the upper upstream roller 20a does not transmit rotation from the rotary shaft 46 to the second small gear 54, while transmitting rotation from the second small gear 54 to the rotary shaft 46. That is, when one of the upstream rollers 20a is driven with a motor upon transfer of the print sheet P, the one-way clutch 53 does not transmit the rotation to the second small gear 54. When the second large gear 52 is rotated to drive the second small gear 54, the one-way clutch 53 transmits the rotational force to the rotary shaft 46 of the upper upstream roller 20a.
- the opening 40 of the casing 2 is opened, such that the jam clear lever 48 is projected to the outside of the opening 40, as shown in Fig. 2 .
- the operator grasps the jam clear lever 48, and raises it in a direction opposite to the print sheet transfer direction F and upward.
- the first guide plate 41 swings upward about the fulcrum shaft 45 while it is bent with the hinge 47, lifted away from the second guide plate 42. With this operation, when the print sheet P exists between the first guide plate 41 and the second guide plate 42, it is exposed. Accordingly, upon occurrence of paper jam, the operator merely inserts his/her hand from the opening 40, and then easily removes the print sheet P.
- the fulcrum shaft 45 is rotated in accordance with the movement, to rotate the first large gear 50 as indicated with an arrow.
- the rotation of the first large gear 50 rotates the second large gear 52 via the first small gear 51 as indicated with an arrow.
- the rotation of the second large gear 52 rotates the rotary shaft 46 of the upper upstream roller 20a in the print sheet transfer direction F via the second small gear 54 and the one-way clutch 53.
- the print sheet P When the print sheet P is jammed between the upstream rollers 20a and the downstream rollers 20b, the print sheet P is fed to the downstream side, and stopped with the downstream rollers 20b, thus a sag is formed between the both rollers 20a and 20b.
- the operator merely inserts his/her hand from the opening 40 to remove the print sheet P as described above.
- the print sheet P is automatically sagged in accordance with the operation to release the first guide plate 41 as described above. Accordingly, it is easier to remove the print sheet P.
- the formation of sag in the print sheet P in accordance with the operation of setting the first guide plate 41 in the release position, to facilitate removal of the print sheet P is particularly advantageous when the upstream side of the print sheet P is held with the upstream rollers 20a while the downstream side is free, or when the upstream side of the print sheet P is held with the upstream rollers 20a while the downstream side is held with the downstream rollers 20b.
- Other states than this state i.e., when the print sheet P is held only with the downstream rollers 20b, or when the print sheet P is not held with any of the upstream rollers 20a and the downstream rollers 20b, it is possible to easily take the print sheet P away with fingers, without sagging the print sheet P. Accordingly, in those states, it is not necessary to forcibly form a sag as in the case of the present embodiment.
- a height H of the opening 40 should have a size to allow the rotation, i.e., the length of the first guide plate 41 in the print sheet transfer direction F.
- the first guide plate 41 since the first guide plate 41 is configured with the first plate body 41a and the second plate body 41b connected with the hinge 47, it is bent between the first plate body 41a and the second plate body 41b upon rotation. Accordingly, the height H of the opening 40 is smaller than the length of the first guide plate 41 in the print sheet transfer direction F.
- the jam clear lever 48 is set to a state not to interfere with the unshown door from the state shown in Fig. 2 or 4 , and the opening 40 of the casing 2 is closed with the door.
- the respective rollers 20 on the driving side of the print sheet transfer device are driven to transfer the print sheet P.
- the respective driving side rollers 20 of the upstream rollers 20a and downstream rollers 20b are driven, the print sheet P is held between the upstream rollers 20a the downstream rollers 20b and transferred toward the downstream.
- the rotation of the upstream rollers 20a is not transmitted via the respective gears to the fulcrum shaft 45.
- the fulcrum shaft 45 is not rotated to swing the first guide plate 41. That is, there is no trouble in the transfer of the print sheet P.
- the upstream rollers 20a are rotated in the transfer direction. Then the print sheet P held with the upstream rollers 20a is fed in the print sheet transfer direction F, to form a sag between the upstream rollers 20a and the downstream rollers 20b.
- the entire configuration of the image forming apparatus 1 in a second embodiment is the same as that in the first embodiment.
- the configuration of the print sheet transfer device different from that in the first embodiment will be described.
- Figs. 5 and 6 are perspective diagrams of a part of the print sheet transfer device provided in the casing 2, viewed through the casing 2 from a diagonal upper position, and viewed from the opposite side to that in Fig. 1 of the first embodiment. Note that in these figures, the opening 40 and the door to open/close the opening 40 exist in a deep inner part of the drawings, although they are not shown.
- the print sheet transfer device has the first interlocking mechanism to interlock the first guide plate 41 with the upstream rollers 20a as in the case of the first embodiment. Accordingly, when the first guide plate 41 is released, the upper side upstream rollers 20a are rotated in the print sheet transfer direction F in accordance with the release operation of the first guide plate 41. The print sheet P held with the upstream rollers 20a is fed in the print sheet transfer direction F.
- the print sheet transfer device has a second interlocking mechanism to interlock the upstream rollers 20a with the downstream rollers 20b.
- the other end of the rotary shaft 46 of the upper upstream rollers 20a and the other end of the rotary shaft 55 of the lower downstream rollers 20b are connected with toothed belt pulleys 56.
- a toothed belt 57 is put around the two toothed belt pulleys 56.
- a one-way clutch is provided at least between the other end of the rotary shaft 46 of the upper upstream rollers 20a and the toothed belt pulley 56 or between the other end of the rotary shaft 55 of the lower downstream roller 20b and the toothed belt pulley 56 (illustration is omitted).
- the upper upstream rollers 20a are rotated in the transfer direction of the print sheet P as indicated with an arrow in accordance with the movement of the first guide plate 41. Further, the rotation of the rotary shaft 46 holding the upstream rollers 20a rotates the rotary shaft 55 of the lower downstream rollers 20b in the opposite direction to the print sheet transfer direction F as indicated with an arrow via the two toothed belt pulleys 56 and the toothed belt 57.
- the upstream side end of the print sheet P held with the upstream rollers 20a is fed in the print sheet transfer direction F, while the downstream side end of the print sheet P held with the downstream rollers 20b is fed in the opposite direction to the print sheet transfer direction F. Accordingly, in comparison with the first embodiment, the print sheet P is further sagged between the upstream rollers 20a and the downstream rollers 20b. The print sheet P stopped by paper jam is more easily removed.
- the release direction of the first guide plate 41 is opposite to that in the second embodiment.
- the upper downstream rollers 20b are rotated in the opposite direction to the transfer direction of the print sheet P in accordance with the movement of the first guide plate 41 to the release position.
- the rotation of the rotary shaft holding the downstream rollers 20b may rotate the rotary shaft of the lower upstream rollers 20a in the print sheet transfer direction F via the two toothed belt pulleys 56 and the toothed belt 57.
- the print sheet transfer device it is possible to infallibly form a sag in the print sheet P as long as the print sheet P is held with at least the upstream rollers 20a or the downstream rollers 20b.
- the print sheet transfer device described above in the respective embodiments is provided in the image forming apparatus 1.
- the purpose of the print sheet transfer device according to the embodiments is not limited to the image forming apparatus 1. It is applicable to all the apparatuses to transfer a sheet type material.
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Abstract
Description
- The present invention relates to a print sheet transfer device used as a unit to transfer a print sheet in, e.g., an image forming apparatus, and more particularly, to a print sheet transfer device capable of, when inconvenience has occurred in transfer timing or when a print sheet has been jammed in a transfer route (so-called paper jam), removing the print sheet from the transfer route with a simple manipulation.
- There is an increasing need from users for downsizing of various apparatuses such as an image forming apparatus having the print sheet transfer device. To meet the requirement, the apparatuses tend to have complicated and high-density packaged internal structure. For this purpose, the print sheet transfer path is often provided in a deep inner part of the apparatus, and surrounded by other devices and constituents. In this case, upon removal of a print sheet jammed in the print sheet transfer path, the space to insert an operator's hand is extremely limited. In many cases, the print sheet is charged with static electricity by contact charge with the transfer path and is attached to the transfer path. It is very difficult to remove the print sheet.
- Generally, when paper jam occurs in the print sheet transfer path of the print sheet transfer device, it is necessary to remove all the print sheets staying in the transfer path. However, in the image forming apparatus which is provided with the print sheet transfer device, the interval between the print sheets transferred with the print sheet transfer device is narrowed in accordance with accelerated image forming speed. The number of print sheets existing in the print sheet transfer path during the operation of the device tends to be increased. Accordingly, when paper jam occurs, the removal of all the large number of print sheets in the print sheet transfer path is very troublesome.
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Patent Literature 1 indicated below discloses an invention of a print sheet transfer device with a purpose of removal of a jammed print sheet with ease from the print sheet transfer path of the print sheet transfer device. According to this print sheet transfer device, as shown inFigs. 2 and3 , a pair ofpaper conveying rollers 7 are provided on an inner side surface of ajam access cover 2 with which a part of a paper conveying passage 17 is opened to the outside. Thepaper conveying rollers 7 are provided in an inverting section 18 of the paper conveying passage 17 to invert the print sheet transfer direction in an intermediate portion. Further, the printsheet transfer roller 7 is configured with a pair ofdriving roller 3 and drivenroller 4. Thedriving roller 3 is provided inside from the drivenroller 4 in the print sheet transfer device. - In the conventional print sheet transfer device, when an operator peers into the device to check the position of a jammed print sheet, the operator inserts his/her hand in the device to pull out the jammed print sheet from the device. The operation is troublesome, and the hand becomes dirty with toner, which is unpleasant for the operator. However, according to this invention, it is possible to pull out jammed print sheet in the print sheet transfer path to the outside by only opening the opening type cover. This simplifies the operation to remove the jammed print sheet upon occurrence of paper jam. Further, it is possible to comfortably perform the operation without getting the operator's hand dirty.
- {Patent Literature 1} Japanese Published Unexamined Patent Application No.
Hei 11-198470 - According to the invention of the print sheet transfer device disclosed in
Patent Literature 1 indicated above, it is possible to comparatively easily remove a jammed print sheet in a portion where the jam access cover to open a part of the print sheet transfer path can be provided. However, as described above, when paper jam occurs in the print sheet transfer path, it is necessary to remove all the large number of print sheets staying in the print sheet transfer path. Accordingly, it is necessary to provide the jam access cover in correspondence with many positions of the print sheet transfer path. However, many image forming apparatuses having the print sheet transfer device have a structural problem that there is no room for the special structure to open a part of the print sheet transfer path along with the print sheet conveying roller to the outside. Accordingly, in the structure ofPatent Literature 1 described above, it is difficult to easily remove a jammed print sheet and all the print sheets existing in the print sheet transfer path upon occurrence of paper jam with a hand. - The present invention has been made in view of the conventional technique and its problem, and aims to enable, in a print sheet transfer device, removal of a print sheet jammed in the print sheet transfer path and other print sheets staying in the print sheet transfer path upon occurrence of paper jam, easily with a hand.
- According to a first aspect of the present invention, there is provided a print sheet transfer device including: an upstream roller that conveys a print sheet; a downstream roller that conveys the print sheet; a guide plate, provided between the upstream roller and the downstream roller, that is movable between a guide position to guide the print sheet and a release position to release the print sheet; a first interlocking mechanism that rotates at least one of the upstream roller and the downstream roller in accordance with an operation to move the guide plate from the guide position to the release position, to form a sag in the print sheet between the upstream roller and the downstream roller, and when the print sheet is transferred, does not transmit rotation of the upstream roller and the downstream roller to the guide plate.
- According to a second aspect of the present invention, in the print sheet transfer device in the first aspect, the first interlocking mechanism rotates the upstream roller in a print sheet transfer direction in accordance with the operation to move the guide plate from the guide position to the release position, so as to feed the print sheet in contact with the upstream roller in the transfer direction, to form the sag in the print sheet.
- According to a third aspect of the present invention, in the print sheet transfer device in the first aspect, the first interlocking mechanism rotates the downstream roller in an opposite direction to a print sheet transfer direction in accordance with the operation to move the guide plate from the guide position to the release position, so as to feed the print sheet in contact with the downstream roller in the opposite direction to the transfer direction, to form the sag in the print sheet.
- According to a fourth aspect of the present invention, the print sheet transfer device in the second or third aspect further includes a second interlocking mechanism that rotates the downstream roller or the upstream roller in an opposite direction to a rotational direction of the upstream roller or the downstream roller in accordance with a rotation of the upstream roller or the downstream roller interlocked with the operation to move the guide plate from the guide position to the release position, so as to form the sag in the print sheet, and when the print sheet is transferred, does not transmit the rotation of the upstream roller or the downstream roller to the downstream roller or the upstream roller.
- According to the print sheet transfer device in the first aspect of the present invention, when the guide plate is moved from the guide position to the release position, at least one of the upstream roller and the downstream roller is rotated in accordance with the movement. Then the print sheet between the upstream roller and the downstream roller is fed, and a sag is formed between the both rollers. Further, upon transfer of the print sheet, the rotation of the upstream roller and the downstream roller is not transmitted to the guide plate, and there is no trouble in print sheet transfer.
- According to the print sheet transfer device in the second aspect of the present invention, when the guide plate is moved from the guide position to the release position, the upstream roller is rotated in the print sheet transfer direction in accordance with the movement. The print sheet in contact with the upstream roller is fed in the transfer direction, and a sag is formed between the upstream roller and the downstream roller which stands still.
- According to the print sheet transfer device in the third aspect of the present invention, when the guide plate is moved from the guide position to the release position, the downstream roller is rotated in the direction opposite to the print sheet transfer direction in accordance with the movement. The print sheet in contact with the downstream roller is fed in the direction opposite to the transfer direction, and a sag is formed between the upstream roller which stands still and the downstream roller.
- According to the print sheet transfer device in the fourth aspect of the present invention, when the guide plate is moved from the guide position to the release position, the upstream roller is rotated in the print sheet transfer direction in accordance with the movement. The downstream roller is rotated in the direction opposite to the rotation of the upstream roller in accordance with the rotation of the upstream roller. As a result, a sag is formed in the print sheet between the upstream roller and the downstream roller. Otherwise, when the guide plate is moved from the guide position to the release position, the downstream roller is rotated in the direction opposite to the print sheet transfer direction in accordance with the movement. The upstream roller is rotated in the print sheet transfer direction in accordance with the rotation of the downstream roller. As a result, a large sag is formed in the print sheet between the upstream roller and the downstream roller. In transfer of the print sheet, the rotation of the upstream roller is not transmitted to the downstream roller, and the rotation of the downstream roller is not transmitted to the upstream roller. There is no trouble in the print sheet transfer.
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Fig. 1 is a cross-sectional diagram schematically showing a structure of an image forming apparatus according to a first embodiment of the present invention; -
Fig. 2 is a perspective diagram of a print sheet transfer device according to the first embodiment, viewed from a diagonal upper position, showing a state where a guide plate is set in a print sheet guide position; -
Fig. 3 is a perspective diagram of the print sheet transfer device according to the first embodiment, viewed from the diagonal upper position, showing a state where the guide plate is set in a print sheet release position; -
Fig. 4 is a perspective diagram of the print sheet transfer device according to the first embodiment, viewed from a front side, showing a state where the guide plate is set in the print sheet guide position; -
Fig. 5 is a perspective diagram of the print sheet transfer device according to a second embodiment of the present invention, viewed from a diagonal upper position in the device, showing a state where the guide plate is set in the print sheet guide position; and -
Fig. 6 is a perspective diagram of the print sheet transfer device according to the second embodiment, viewed from the diagonal upper position in the device, showing a state where the guide plate is set in the print sheet release position. - The present embodiment relates to an image forming apparatus having a print sheet transfer device.
- As shown in
Fig. 1 , atransfer path 3 to guide a print sheet P is set in acasing 2 of animage forming apparatus 1. Thetransfer path 3 has a closed loop-shapedcirculation path 7 configured with a horizontallower path 4 to perform image formation on the print sheet P as a recording medium, a horizontalupper path 5 to reverse the print sheet P in which image formation has been made on its front surface and return the print sheet P to thelower path 4, and twoconnection paths 6 connecting respective both ends of thelower path 4 and theupper path 5. The print sheet P is subjected to image formation in the middle of transfer in thecirculation path 7 in a counterclockwise direction in the figure. - As shown in
Fig. 1 , apaper feeding section 8 to feed the print sheet P is connected to the upstream side of thelower path 4 in thetransfer path 3. Thepaper feeding section 8 is configured to feed the top print sheet P, among the print sheets P stacked on a paper feed table, vertically movable with an unshown mechanism, into thelower path 4. Further, in thetransfer path 3, abelt transfer mechanism 9 as a conveyance section is provided on the lower side of a central portion of thelower path 4. Thebelt transfer mechanism 9 has abelt 10 which has a large number of unshown holes and which is circulate-driven, and asuction part 11 which sucks air downward from the holes of thebelt 10 moving on the upper side to suck the print sheet P to the upper surface of thebelt 10. It is possible to transfer the print sheet P, in a state where it is sucked to the upper surface of thebelt 10, along thelower path 4. -
Rollers 20 for transfer, as a transfer section for the print sheet P, are provided at arbitrary intervals at both ends of thelower path 4, theupper path 5 and the twoconnection paths 6, corresponding to both sides of thebelt transfer mechanism 9. The print sheet P is transferred along theserespective paths rollers 20 are provided along thecirculation path 7 in this manner, and in addition, are provided at arbitrary intervals in a paper discharge path and a switchback path branched from thecirculation path 7 as described later. - An
image forming section 30 is provided above thebelt transfer mechanism 9 on thelower path 4. Theimage forming section 30 is a device having four ink-jet devices to discharge K (black) ink, C (cyan) ink, M (magenta) ink and Y (yellow) ink arrayed along a transfer direction of the print sheet P. It is possible to form a desired color image by discharging color ink on the upper surface of the print sheet P fed with thebelt transfer mechanism 9. - A
paper discharge path 21 provided with therollers 20 is branched toward a diagonal upward direction on the downstream side of theupper path 5 in thecirculation path 7. The terminal end of thepaper discharge path 21 is connected to a paper discharge table 22 provided in thecasing 2. The end side (downstream side) of the paper discharge table 22 is raised in a slope shape. The print sheet P, where the image has been formed with theimage forming section 30 on the upper surface is discharged, in a faced down state (the upper surface is faced down), onto the paper discharge table 22. Further, the print sheet, where images are formed on the both surfaces, is discharged, with its surface first subjected to the image formation faced up, onto the paper discharge table 22. - In the
circulation path 7, aswitchback path 25 is branched in the middle of one of theconnection paths 6 connecting the downstream side of theupper path 5 and the upstream side of thelower path 4, and slightly on the downstream side from the branching point of thepaper discharge path 21. Theswitchback path 25 has a dead-end structure. Although the details are unshown, therollers 20 are provided in the middle of the path. In this structure, the print sheet P, already subjected to image formation and guided from thecirculation path 7 to theswitchback path 25, is reciprocated in theswitchback path 25, then returned to thecirculation path 7. Thus the printing sheet P in thecirculation path 7 is reversed. Accordingly, in this structure, it is possible to perform printing on the both surfaces of one print sheet P by a series of operations. That is, an image is formed with the ink-jet device (image forming section) 30 on one surface of the print sheet P while the print sheet P is transferred along thelower path 4 in thecirculation path 7. Then, the print sheet P is sent from theupper path 5 into theswitchback path 25. The print sheet P is sent backward from theswitchback path 25 into thecirculation path 7. Thus the print sheet P is reversed. The print sheet is transferred again along thelower path 4 and is passed in the vicinity of the ink-jet device (image forming section) 30, and another image is formed on the other surface of the print sheet P. - As described above, in the
image forming apparatus 1 according to the present embodiment, the print sheet P is fed from thepaper feeding section 8 into thelower path 4 in thecirculation path 7. When an image is formed with the ink-jet device (image forming section) 30 on the surface of the print sheet P and the print sheet P is discharged to the paper discharge table 22, it is possible to discharge the print sheet with the image forming surface is faced down. This is single-sided printing of forming an image on only one surface of the print sheet P. Further, it is possible to perform double-sided printing of forming images on both surfaces of the print sheet P. In this case, the print sheet P with one surface subjected to the image formation is not discharged to the paper discharge table 22 but the print sheet P is guided to theswitchback path 25. The print sheet P is reversed by being reciprocated in theswitchback path 25, and then returned to thecirculation path 7. The print sheet P is transferred again along thecirculation path 7, and an image is formed with the ink-jet device (image forming section) 30, on the rear surface of the print sheet P. It is possible to discharge the print sheet P, with the surface first subjected to the image formation faced up, onto the paper discharge table 22. - The
image forming apparatus 1 has a configuration for removing the print sheet P, when it is jammed in the print sheet transfer device, from thetransfer path 3. In theimage forming apparatus 1 shown inFig. 1 , an opening 40 (indicated with a broken line) to access the inner mechanisms is formed in a side plate of thecasing 2, i.e., a plate body on the front surface side or rear surface side of thecasing 2 provided orthogonally to the drawing surface of the figure. Theopening 40 is opened or closed with an unshown door. Theopening 40 and the door are provided in plural positions corresponding to thetransfer path 3 for access to the print sheet P in any position of thetransfer path 3. InFig. 1 , as a representative example, theopening 40 and the door are provided in the vicinity of a part of theupper path 5 close to thepaper discharge path 21. -
Figs. 2 and3 are perspective diagrams showing the opening 40 (indicated with an alternate long and short dash line) and a part of the print sheet transfer device provided in thecasing 2, viewed from the outside through thecasing 2 from a diagonal upper position. Further,Fig. 4 is a perspective diagram showing a part of the print sheet transfer device viewed through thecasing 2 from the front surface side. Theopening 40 is not shown. Note that these figures do not show the door to open/close theopening 40. - The print sheet transfer device has, as a pair of guide plates forming the
transfer path 3, an upperfirst guide plate 41 and a lowersecond guide plate 42 provided in parallel to each other at a predetermined interval. Note that in this embodiment, thefirst guide plate 41 is on the upper side and thesecond guide plate 42 is on the lower side. However, the reference numerals are assigned merely to show relative positional relation. For example, as theconnection paths 6 connecting thelower path 4 and theupper path 5 are paths provided in a vertical direction, the pair of guide plates are provided as a right side first guide plate and a left side second guide plate, in parallel to each other at a predetermined interval. - Further, the guide plates are provided in parallel to each other at a predetermined interval as a pair. However, the guide plates are not necessarily provided as a pair. For example, in a curved path provided in the vertical direction as in the case of the
connection paths 6 connecting thelower path 4 with theupper path 5, the print sheet P may be guide-transferred along a concave surface side of one guide plate. - This print sheet transfer device has
plural rollers 20 for transfer provided along thefirst guide plate 41 and thesecond guide plate 42. Theplural rollers 20 are configured as plural pairs of rollers to transfer the print sheet P held between the rollers. InFigs. 1 to 3 , among the plural pairs of rollers, two pairs of rollers are shown. For the sake of convenience,respective rollers 20 of the pairs ofrollers 20 on the upstream side with respect to a print sheet transfer direction F are referred to as upstream rollers 20a, whilerespective rollers 20 of the pairs ofrollers 20 on the downstream side with respect to the print sheet transfer direction F are referred to asdownstream rollers 20b. - Note that in the present embodiment, the
rollers 20 are provided in pairs. However, even when therollers 20 are not in pairs, it is possible to transfer the print sheet P. For example, it is possible to transfer the print sheet P while holding the print sheet P between the surface of one guide plate and oneroller 20. - One of two
rollers 20 forming a pair is a driving roller, and the other one, a driven roller. The tworollers 20 making up a pair are in contact with each other in the position of a throughhole 43 formed in one or both of thefirst guide plate 41 and thesecond guide plate 42. It is possible to transfer the print sheet P along a gap between thefirst guide plate 41 and thesecond guide plate 42 by driving one of the rollers while holding the print sheet P between the rollers. - As shown in
Figs. 2 and3 , in thefirst guide plate 41 on the upper side, an edge on the upstream side orthogonal to the print sheet transfer direction F is fixed to afulcrum shaft 45 via anaccouplement 44. Thefulcrum shaft 45 is rotatable. Thefulcrum shaft 45 is provided in an adjacent part on the upstream side from therotary shaft 46 of the upper upstream rollers 20a and is in parallel to therotary shaft 46 of the upper upstream rollers 20a. Further, thefirst guide plate 41 on the upper side is divided into a downstream first plate body 41a and an upstreamsecond plate body 41b along a parting line parallel to the direction orthogonal to the print sheet transfer direction F. The first plate body 41a and thesecond plate body 41b are rotatably connected with ahinge 47. Accordingly, the upstreamsecond plate body 41b is connected to thefulcrum shaft 45. Further, a jamclear lever 48, projecting to the outside of thecasing 2 from the opening 40 from which the door is opened, is attached to a side edge of the first plate body 41a on the downstream side. InFig. 2 , when an operator holds the jamclear lever 48 with his/her fingers and raises it, then as shown inFig. 3 , thefirst guide plate 41 swings upward about thefulcrum shaft 45 while it is bent in an upward-convex shape at thehinge 47, then the entirefirst guide plate 41 is lifted up away from thesecond guide plate 42. With this operation, when the print sheet P exists between thefirst guide plate 41 and thesecond guide plate 42, it is exposed. Accordingly, the print sheet P is easily removed upon occurrence of paper jam. - As shown in
Fig. 2 , the position of the guide plate when thefirst guide plate 41 and thesecond guide plate 42, facing each other at a predetermined interval, is referred to as a guide position to guide the print sheet P transferred with therollers 20. Further, the position to lift up thefirst guide plate 41 by using the jamclear lever 48 to release the print sheet P in the gap between thefirst guide plate 41 and thesecond guide plate 42 is referred to as a release position to release the jammed print sheet P. It is possible to move thefirst guide plate 41 between the relatively lower guide position and the relatively upper release position within about a 90-degree range by manipulation of the jamclear lever 48. It is possible to selectively set thefirst guide plate 41 in the both positions. - Note that it may be configured such that the jam
clear lever 48 is attached to the first plate body 41a only when the door is opened to open theopening 40 and the jamclear lever 48 is used for jam clear. When the print sheet transfer device is used while the door is closed, the jamclear lever 48 is removed from the first plate body 41a. Further, it may be configured such that the jamclear lever 48 is slidably attached to the first plate body 41a along the direction orthogonal to the print sheet transfer direction F. When the print sheet transfer device is used while the door is closed, the jamclear lever 48 is inserted in thecasing 2 and accommodated in a position not to interfere with the unshown door. Only when the door is opened to open theopening 40 and the jamclear lever 48 is used for jam clear, it is pulled out to the outside from theopening 40 of thecasing 2. - As described above, the
first guide plate 41 is rotatable about thefulcrum shaft 45. The present print sheet transfer device has a mechanism to rotate the upper side of the upstream rollers 20a in a direction where the print sheet P is transferred in the print sheet transfer direction F in accordance with the rotation of thefirst guide plate 41, to feed the print sheet P between the upstream rollers 20a and thedownstream rollers 20b, to form a sag as shown inFig. 3 . Hereinbelow, a first interlocking mechanism to form a sag in the print sheet P will be described. - Note that in the following description, as a simplified expression of "rotating the
roller 20 in the direction where the print sheet P is transferred in the print sheet transfer direction F", "rotating theroller 20 in the print sheet transfer direction F" will be used. - As shown in
Figs. 2 to 4 , a firstlarge gear 50 is connected to one end of thefulcrum shaft 45 connected to thefirst guide plate 41 on theopening 40 side. The firstlarge gear 50 is engaged with a firstsmall gear 51. The firstsmall gear 51 is connected to therotary shaft 46 coaxially with a secondlarge gear 52. A secondsmall gear 54 is attached via a one-way clutch 53 to therotary shaft 46 of theupper roller 20 of the upstream rollers 20a. The secondlarge gear 52 is engaged with the secondsmall gear 54. - The one-way clutch 53 between the
rotary shaft 46 and the secondsmall gear 54 of the upper upstream roller 20a does not transmit rotation from therotary shaft 46 to the secondsmall gear 54, while transmitting rotation from the secondsmall gear 54 to therotary shaft 46. That is, when one of the upstream rollers 20a is driven with a motor upon transfer of the print sheet P, the one-way clutch 53 does not transmit the rotation to the secondsmall gear 54. When the secondlarge gear 52 is rotated to drive the secondsmall gear 54, the one-way clutch 53 transmits the rotational force to therotary shaft 46 of the upper upstream roller 20a. - According to the configuration for removal of jammed paper in the print sheet transfer device, the following operations are obtained regarding removal of print sheet P upon paper jam.
- Assuming that paper jam occurs upon print sheet transfer and the print sheet P is to be removed from the
transfer path 3, then theopening 40 of thecasing 2 is opened, such that the jamclear lever 48 is projected to the outside of theopening 40, as shown inFig. 2 . The operator grasps the jamclear lever 48, and raises it in a direction opposite to the print sheet transfer direction F and upward. - As shown in
Fig. 3 , thefirst guide plate 41 swings upward about thefulcrum shaft 45 while it is bent with thehinge 47, lifted away from thesecond guide plate 42. With this operation, when the print sheet P exists between thefirst guide plate 41 and thesecond guide plate 42, it is exposed. Accordingly, upon occurrence of paper jam, the operator merely inserts his/her hand from theopening 40, and then easily removes the print sheet P. - As shown in
Fig. 3 , when thefirst guide plate 41 is moved from the guide position to the release position, thefulcrum shaft 45 is rotated in accordance with the movement, to rotate the firstlarge gear 50 as indicated with an arrow. The rotation of the firstlarge gear 50 rotates the secondlarge gear 52 via the firstsmall gear 51 as indicated with an arrow. The rotation of the secondlarge gear 52 rotates therotary shaft 46 of the upper upstream roller 20a in the print sheet transfer direction F via the secondsmall gear 54 and the one-way clutch 53. When the print sheet P is jammed between the upstream rollers 20a and thedownstream rollers 20b, the print sheet P is fed to the downstream side, and stopped with thedownstream rollers 20b, thus a sag is formed between the bothrollers 20a and 20b. The operator merely inserts his/her hand from theopening 40 to remove the print sheet P as described above. The print sheet P is automatically sagged in accordance with the operation to release thefirst guide plate 41 as described above. Accordingly, it is easier to remove the print sheet P. - In this manner, the formation of sag in the print sheet P in accordance with the operation of setting the
first guide plate 41 in the release position, to facilitate removal of the print sheet P, is particularly advantageous when the upstream side of the print sheet P is held with the upstream rollers 20a while the downstream side is free, or when the upstream side of the print sheet P is held with the upstream rollers 20a while the downstream side is held with thedownstream rollers 20b. Other states than this state, i.e., when the print sheet P is held only with thedownstream rollers 20b, or when the print sheet P is not held with any of the upstream rollers 20a and thedownstream rollers 20b, it is possible to easily take the print sheet P away with fingers, without sagging the print sheet P. Accordingly, in those states, it is not necessary to forcibly form a sag as in the case of the present embodiment. - Note that when the
first guide plate 41 is a single plate body, the rotational radius of thefirst guide plate 41 about thefulcrum shaft 45 is the same as the length of thefirst guide plate 41 in the print sheet transfer direction F. The rotational radius of the jamclear lever 48 following the rotation of thefirst guide plate 41 is also the same as the length of thefirst guide plate 41 in the print sheet transfer direction F. Accordingly, a height H of theopening 40 should have a size to allow the rotation, i.e., the length of thefirst guide plate 41 in the print sheet transfer direction F. However, in the present embodiment, since thefirst guide plate 41 is configured with the first plate body 41a and thesecond plate body 41b connected with thehinge 47, it is bent between the first plate body 41a and thesecond plate body 41b upon rotation. Accordingly, the height H of theopening 40 is smaller than the length of thefirst guide plate 41 in the print sheet transfer direction F. - Upon print sheet transfer, the jam
clear lever 48 is set to a state not to interfere with the unshown door from the state shown inFig. 2 or4 , and theopening 40 of thecasing 2 is closed with the door. Therespective rollers 20 on the driving side of the print sheet transfer device are driven to transfer the print sheet P. When the respectivedriving side rollers 20 of the upstream rollers 20a anddownstream rollers 20b are driven, the print sheet P is held between the upstream rollers 20a thedownstream rollers 20b and transferred toward the downstream. At this time, the rotation of the upstream rollers 20a is not transmitted via the respective gears to thefulcrum shaft 45. Thefulcrum shaft 45 is not rotated to swing thefirst guide plate 41. That is, there is no trouble in the transfer of the print sheet P. - In the first embodiment, by setting the
first guide plate 41 in the release position, the upstream rollers 20a are rotated in the transfer direction. Then the print sheet P held with the upstream rollers 20a is fed in the print sheet transfer direction F, to form a sag between the upstream rollers 20a and thedownstream rollers 20b. - However, it is possible to adopt a mechanism to rotate the
downstream rollers 20b in an opposite direction to the transfer direction by setting thefirst guide plate 41 in the release position. The print sheet P held with thedownstream rollers 20b is fed in the direction opposite to the transfer direction, to form a sag between thedownstream rollers 20b and the upstream rollers 20a. In this case, the direction to release thefirst guide plate 41 is opposite to that in the first embodiment. Thedownstream rollers 20b are rotated in the opposite direction to the transfer direction in accordance with the operation to release thefirst guide plate 41. - Further, it is possible to adopt a mechanism to rotate the upstream rollers 20a in the print sheet transfer direction F in accordance with the operation to release the
first guide plate 41, and rotate thedownstream rollers 20b in the opposite direction to the print sheet transfer direction F. In this case, as long as the print sheet P between the upstream rollers 20a and thedownstream rollers 20b is held with at least the upstream rollers 20a or thedownstream rollers 20b, it is possible to form a sag in the print sheet P. - The entire configuration of the
image forming apparatus 1 in a second embodiment is the same as that in the first embodiment. The configuration of the print sheet transfer device different from that in the first embodiment will be described. -
Figs. 5 and6 are perspective diagrams of a part of the print sheet transfer device provided in thecasing 2, viewed through thecasing 2 from a diagonal upper position, and viewed from the opposite side to that inFig. 1 of the first embodiment. Note that in these figures, theopening 40 and the door to open/close theopening 40 exist in a deep inner part of the drawings, although they are not shown. - As shown in
Figs. 5 and6 , the print sheet transfer device has the first interlocking mechanism to interlock thefirst guide plate 41 with the upstream rollers 20a as in the case of the first embodiment. Accordingly, when thefirst guide plate 41 is released, the upper side upstream rollers 20a are rotated in the print sheet transfer direction F in accordance with the release operation of thefirst guide plate 41. The print sheet P held with the upstream rollers 20a is fed in the print sheet transfer direction F. In addition, the print sheet transfer device has a second interlocking mechanism to interlock the upstream rollers 20a with thedownstream rollers 20b. That is, the other end of therotary shaft 46 of the upper upstream rollers 20a and the other end of therotary shaft 55 of the lowerdownstream rollers 20b are connected with toothed belt pulleys 56. Atoothed belt 57 is put around the two toothed belt pulleys 56. Further, a one-way clutch is provided at least between the other end of therotary shaft 46 of the upper upstream rollers 20a and thetoothed belt pulley 56 or between the other end of therotary shaft 55 of the lowerdownstream roller 20b and the toothed belt pulley 56 (illustration is omitted). - With this one-way clutch, when the
first guide plate 41 is set in the release position, the rotation of therotary shaft 46 of the upper upstream rollers 20a rotates therotary shaft 55 of the lowerdownstream rollers 20b in the opposite direction to the print sheet transfer direction F via thetoothed belt pulley 56 and thetoothed belt 57. When the upstream rollers 20a and thedownstream rollers 20b are driven with the motor in the print sheet transfer direction F upon transfer of the print sheet P, the upstream rollers 20a and thedownstream rollers 20b are not interlocked. The print sheet P is transferred without any trouble. - As shown in
Fig. 6 , in the print sheet transfer device, when thefirst guide plate 41 is moved from the guide position to the release position, the upper upstream rollers 20a are rotated in the transfer direction of the print sheet P as indicated with an arrow in accordance with the movement of thefirst guide plate 41. Further, the rotation of therotary shaft 46 holding the upstream rollers 20a rotates therotary shaft 55 of the lowerdownstream rollers 20b in the opposite direction to the print sheet transfer direction F as indicated with an arrow via the two toothed belt pulleys 56 and thetoothed belt 57. Accordingly, the upstream side end of the print sheet P held with the upstream rollers 20a is fed in the print sheet transfer direction F, while the downstream side end of the print sheet P held with thedownstream rollers 20b is fed in the opposite direction to the print sheet transfer direction F. Accordingly, in comparison with the first embodiment, the print sheet P is further sagged between the upstream rollers 20a and thedownstream rollers 20b. The print sheet P stopped by paper jam is more easily removed. - Note that as a modification to the second embodiment, the following configuration may be used. That is, the release direction of the
first guide plate 41 is opposite to that in the second embodiment. The upperdownstream rollers 20b are rotated in the opposite direction to the transfer direction of the print sheet P in accordance with the movement of thefirst guide plate 41 to the release position. Further, the rotation of the rotary shaft holding thedownstream rollers 20b may rotate the rotary shaft of the lower upstream rollers 20a in the print sheet transfer direction F via the two toothed belt pulleys 56 and thetoothed belt 57. With this configuration, it is possible to form a sag larger than that in the first embodiment in the print sheet P as in the case of the second embodiment. - Further, in the print sheet transfer device according to the second embodiment, it is possible to infallibly form a sag in the print sheet P as long as the print sheet P is held with at least the upstream rollers 20a or the
downstream rollers 20b. - Note that the print sheet transfer device described above in the respective embodiments is provided in the
image forming apparatus 1. However, the purpose of the print sheet transfer device according to the embodiments is not limited to theimage forming apparatus 1. It is applicable to all the apparatuses to transfer a sheet type material. - Description of reference numerals given in the figures is as follows:
- 1··· image forming apparatus
- 2··· casing
- 3··· transfer path
- 20··· roller for transfer
- 20a··· upstream roller
- 20b··· downstream roller
- 41··· first guide plate
- 41a··· first plate body
- 41b··· second plate body
- 42··· second guide plate
- 45··· fulcrum shaft forming first interlocking mechanism
- 46··· rotary shaft forming first interlocking mechanism
- 50··· first large gear forming first interlocking mechanism
- 51··· first small gear forming first interlocking mechanism
- 52··· second large gear forming first interlocking mechanism
- 53··· one-way clutch forming first interlocking mechanism
- 54··· second small gear forming first interlocking mechanism
- 56··· toothed belt pulley forming second interlocking mechanism
- 57··· toothed belt forming second interlocking mechanism
- F··· print sheet transfer direction
- P··· print sheet
Claims (4)
- A print sheet transfer device comprising:an upstream roller that conveys a print sheet;a downstream roller that conveys the print sheet;a guide plate, provided between the upstream roller and the downstream roller, that is movable between a guide position to guide the print sheet and a release position to release the print sheet;a first interlocking mechanism that rotates at least one of the upstream roller and the downstream roller in accordance with an operation to move the guide plate from the guide position to the release position, to form a sag in the print sheet between the upstream roller and the downstream roller, and when the print sheet is transferred, does not transmit rotation of the upstream roller and the downstream roller to the guide plate.
- The print sheet transfer device according to claim 1, wherein the first interlocking mechanism rotates the upstream roller in a print sheet transfer direction in accordance with the operation to move the guide plate from the guide position to the release position, so as to feed the print sheet in contact with the upstream roller in the transfer direction, to form the sag in the print sheet.
- The print sheet transfer device according to claim 1, wherein the first interlocking mechanism rotates the downstream roller in an opposite direction to a print sheet transfer direction in accordance with the operation to move the guide plate from the guide position to the release position, so as to feed the print sheet in contact with the downstream roller in the opposite direction to the transfer direction, to form the sag in the print sheet.
- The print sheet transfer device according to claim 2 or 3, further comprising a second interlocking mechanism that rotates the downstream roller or the upstream roller in an opposite direction to a rotational direction of the upstream roller or the downstream roller in accordance with a rotation of the upstream roller or the downstream roller interlocked with the operation to move the guide plate from the guide position to the release position, so as to form the sag in the print sheet, and when the print sheet is transferred, does not transmit the rotation of the upstream roller or the downstream roller to the downstream roller or the upstream roller.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015010450A JP2016132570A (en) | 2015-01-22 | 2015-01-22 | Sheet conveyance device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3048071A1 true EP3048071A1 (en) | 2016-07-27 |
Family
ID=55177845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16151945.9A Withdrawn EP3048071A1 (en) | 2015-01-22 | 2016-01-19 | Print sheet transfer device |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160214814A1 (en) |
EP (1) | EP3048071A1 (en) |
JP (1) | JP2016132570A (en) |
CN (1) | CN105819247A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6817536B2 (en) * | 2016-11-29 | 2021-01-20 | 株式会社リコー | Conveyor device and image forming device |
CN108116062B (en) * | 2016-11-30 | 2019-11-05 | 东友科技股份有限公司 | Print media feed mechanism with adjustable contact roller support arm |
CN108116061B (en) * | 2016-11-30 | 2019-08-09 | 东友科技股份有限公司 | The print media feed mechanism of adjustable idler wheel pressing force |
CN107393136B (en) * | 2017-08-14 | 2023-08-01 | 昆山古鳌电子机械有限公司 | Paper money conveying device |
JP7073662B2 (en) * | 2017-09-29 | 2022-05-24 | コニカミノルタ株式会社 | Image forming device and jam processing method |
JP7160654B2 (en) * | 2018-11-29 | 2022-10-25 | 長野日本無線株式会社 | How to clear a printer jam |
JP7323863B2 (en) * | 2019-09-19 | 2023-08-09 | セイコーエプソン株式会社 | MEDIUM CONVEYING DEVICE, POST-PROCESSING DEVICE AND RECORDING DEVICE |
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US5326092A (en) * | 1992-01-10 | 1994-07-05 | Kabushiki Kaisha Toshiba | Apparatus for conveying a paper along with a paper conveying path |
JPH11198470A (en) | 1998-01-20 | 1999-07-27 | Murata Mach Ltd | Paper conveying device |
US20090196635A1 (en) * | 2008-02-01 | 2009-08-06 | Konica Minolta Business Technologies, Inc. | Sheet conveying device |
JP2012035942A (en) * | 2010-08-04 | 2012-02-23 | Sharp Corp | Image forming device |
US20120188324A1 (en) * | 2011-01-24 | 2012-07-26 | Toshiba Tec Kabushiki Kaisha | Sheet conveying apparatus, erasing apparatus, and image forming apparatus |
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JPH09188438A (en) * | 1996-01-08 | 1997-07-22 | Canon Inc | Sheet material conveyance device and image forming device |
JP2003072978A (en) * | 2001-09-07 | 2003-03-12 | Ricoh Co Ltd | Image forming device |
JP2003321145A (en) * | 2002-05-02 | 2003-11-11 | Murata Mach Ltd | Image recorder |
JP2005035789A (en) * | 2003-06-30 | 2005-02-10 | Kyocera Mita Corp | Punching device and post-processing device with the same being mounted |
JP2007055780A (en) * | 2005-08-25 | 2007-03-08 | Fuji Xerox Co Ltd | Conveying device |
CN101247452B (en) * | 2007-02-16 | 2011-03-16 | 致伸科技股份有限公司 | Automatic paper feeder capable of loosing clamped paper |
JP2009208951A (en) * | 2008-03-06 | 2009-09-17 | Riso Kagaku Corp | Image forming device |
-
2015
- 2015-01-22 JP JP2015010450A patent/JP2016132570A/en active Pending
-
2016
- 2016-01-08 CN CN201610010644.8A patent/CN105819247A/en active Pending
- 2016-01-14 US US14/995,762 patent/US20160214814A1/en not_active Abandoned
- 2016-01-19 EP EP16151945.9A patent/EP3048071A1/en not_active Withdrawn
Patent Citations (5)
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US5326092A (en) * | 1992-01-10 | 1994-07-05 | Kabushiki Kaisha Toshiba | Apparatus for conveying a paper along with a paper conveying path |
JPH11198470A (en) | 1998-01-20 | 1999-07-27 | Murata Mach Ltd | Paper conveying device |
US20090196635A1 (en) * | 2008-02-01 | 2009-08-06 | Konica Minolta Business Technologies, Inc. | Sheet conveying device |
JP2012035942A (en) * | 2010-08-04 | 2012-02-23 | Sharp Corp | Image forming device |
US20120188324A1 (en) * | 2011-01-24 | 2012-07-26 | Toshiba Tec Kabushiki Kaisha | Sheet conveying apparatus, erasing apparatus, and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN105819247A (en) | 2016-08-03 |
JP2016132570A (en) | 2016-07-25 |
US20160214814A1 (en) | 2016-07-28 |
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