EP0934224A1 - Reversing mechanism for sheet-like items - Google Patents
Reversing mechanism for sheet-like itemsInfo
- Publication number
- EP0934224A1 EP0934224A1 EP97947696A EP97947696A EP0934224A1 EP 0934224 A1 EP0934224 A1 EP 0934224A1 EP 97947696 A EP97947696 A EP 97947696A EP 97947696 A EP97947696 A EP 97947696A EP 0934224 A1 EP0934224 A1 EP 0934224A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- area
- path
- sheets
- switch unit
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H15/00—Overturning articles
- B65H15/004—Overturning articles employing rollers
-
- 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
- B65H2404/63—Oscillating, pivoting around an axis parallel to face of material, e.g. diverting means
- B65H2404/632—Wedge member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S271/00—Sheet feeding or delivering
- Y10S271/902—Reverse direction of sheet movement
Definitions
- the present invention relates to a turning arrangement in a guiding system for sheets of sheet material, in particular for single sheets of paper in a single sheet printer with a paper guiding system, the guiding system containing switch elements which make it possible to use one or the other of the sheets as required other side of it up to a unit for further processing.
- the invention further relates to a passive switch unit.
- a sheet transport device is known from Patents Abstracts of Japan M-701 together with JP 62-290 668 A, which has three areas which are connected by transport paths.
- An active switch unit and a passive switch unit enable single sheets coming from a first area to be fed either directly without turning or by means of the passive switch unit under turning to a third area.
- a similar arrangement is also known from DE 37 27 555 AI.
- DE 88 03 496 U1 describes a printer with a plurality of output channels for recording media. Single sheets are required via deflection elements in the printer. Extruded profiles are arranged close to the feed rollers and their contours lie relatively close to these rollers.
- DE 39 14 183 AI also describes a transport device for paper sheets, with switch assemblies being used.
- the conveyor track is formed by extruded profiles which are arranged close to conveyor rollers and whose contours correspond.
- a transport device for paper in a copier is known from US Pat. No. 5,014,976.
- a guide element with different curvatures is known in the feed path for single sheets. The single sheets are guided along these curves.
- the invention is based on the object of providing a reliable turning arrangement and a passive switch unit with a simple structure.
- the invention has a triangular arrangement of a first region or region of origin, a second region or target region and a third region or turning region, with which the transport direction is reversed.
- a first region or region of origin In the target area, one obtains either sheets with one side facing upwards from the area of origin directly to the target area, or sheets with the other side facing upwards by moving indirectly from the area of origin via the reverse area, where their transport direction is reversed will be fed to the target area.
- the combination of the triangular arrangement formed by the three regions with the reversal of the transport direction taking place in the reversal region thus enables the arches to be turned.
- the invention requires only a few moving parts, is therefore simple in construction and can be produced with little effort.
- the active switch unit is a controlled deflection element which, depending on the control, deflects the sheets transported from the origin area into the first path or into the second path.
- the entire turning process of a sheet is thus achieved by a single, small, deflecting element, which greatly reduces the risk of paper jams in the turning device.
- the passive switch unit only allows arcs to pass either along the second path from the origin area to the reversal area or along the third path from the reversal area to the destination area.
- the arches have only two options for going through the turning arrangement, namely directly from the origin area to the target area or indirectly from the origin area via the reversal area to the target area, one side or the other of the arcs points up in the target area.
- the reversing unit consists of a pair of counter-rotating rollers with a feed area between the rollers and a position detector for detecting the feed position of the sheets, wherein the pair of rollers can be operated in two directions for pulling in and pushing out the sheets in the opposite direction.
- the position detector e.g. in the form of a light barrier, detects when the rear end of the curve has completely passed through the passive switch unit. Only then can the transport of the sheet in the forward direction be stopped and the transport direction reversed, whereby when the sheet is subsequently transported in the backward direction, the passive switch unit is passed through the bow differently due to its special shape than when the sheet is transported in the forward direction.
- the different paths and the active as well as the passive switch unit are defined by means of extruded profiles lying opposite one another, which are fastened between two plates arranged in parallel.
- one of the paired extruded profiles is arranged so as to be pivotable about an axis of rotation running perpendicular to the transport direction of the sheets and m of the plane of the sheets and can be locked between the two plates arranged in parallel at the position defining the respective path. This pivoting some of the extruded profiles the turret assembly made light ⁇ a fast and easy access to all areas of the paper path and the switch units in case of paper jams.
- a pair of rollers for transporting the sheets is arranged in each of the three areas with a position detector assigned to the respective pair of rollers for detecting the position of the sheets, the path length along the different paths between the respective pairs of rollers of the three areas is shorter than the length of the sheet to be transported. This ensures that a sheet to be transported through the paths is always between one of the roller pairs of the three areas and that its further transport is ensured.
- a design of the turning arrangement is particularly expedient, in which the contours of the extruded profiles lie in the three regions close to the contours of the respective rolls. This minimizes the risk of paper jams in the area of the roller pairs when transitioning from one end of the channel to the next beginning of a path.
- the contours of the extruded profiles and the rollers partially overlap, and projections of the extruded profiles engage in depressions in the rollers and / or projections of the rollers in the depressions of the extruded profiles. Due to this extremely close approach of the rolls to the extruded profiles, the "transfer" of the sheets from the channels to the transport rolls and vice versa from the Transport rollers to the channels are associated with an extremely low risk of paper jams.
- the deflecting element of the active switch unit is essentially wedge-shaped, the tapering decision edge of the wedge being directed towards the path for the sheet hm transported to the turning arrangement and the wedge in the region of its base around a perpendicular to the transport ⁇ chtung the arc and to the plane of the sheet duri ⁇ parallel Fende axis of rotation is arranged to be pivotable between a first position and a second position, wherein the base of the wedge perpendicular to the axis of rotation of the wedge the area between the entrance regions m, the two paths for the target area or shielded to the reversal area shielded and the bends e are directed along the wedge surface m one way or the other according to the position of the deflecting element.
- This configuration of the active or dynamic switch unit achieves an efficient and reliable switch function with little risk of paper jams. Due to the wedge shaped configuration of the deflecting element also occurring when moving the Umlenkele ⁇ ments dynamic forces are very small, whereby, for example, let realize a high switching frequency for the Umlenke- lement.
- the passive switch unit has a fixed wedge with a decision edge, the tapering wedge being bent away from a path cb with respect to the bisector of the angle formed by the tangents to the two paths ac and cb in the region of the passive switch unit.
- This special shape of the passive or static switch unit enables the paper to pass through the bulged part of this path in a curved manner on the way to the reversal area when paper is supplied from the active or dynamic switch unit along the path ac.
- the extruded profile of the path ac is bulged in the area opposite the bent wedge, so that the gap width of the path ac between the extruded profile and the bent away wedge is essentially constant. This avoids a narrowing and thus an increased resistance for the arcs in the path ac.
- a passive switch unit is specified, the features of which are defined in claim 11.
- FIG. 1 shows a sectional view of a first embodiment of the turning arrangement according to the invention
- FIG. 2 shows a sectional view of a second embodiment of the turning arrangement according to the invention
- Fig. 3 is a sectional view illustrating the
- FIG. 4 is a sectional view illustrating the
- Fig. 5 shows a sectional view of a device built inven inventive turn arrangement.
- the turning arrangement contains a combination of profiles Pl to P5, which are e.g. are extruded profiles and are between two plates (not shown), e.g. Sheet metal plates are attached.
- the extruded profiles Pl to P5, which make a contribution to the device stability, are with the side plates, e.g. can have a thickness of only 2 mm, rigidly screwed.
- screw fastening e.g. self-tapping screws are used. The screwing takes place in m openings (not shown) which have already been formed in the respective extruded profile Pl to P5 for this purpose.
- the extruded profiles P3 and P5 are rotatably fastened about a respective axis of rotation G, so that they can be pivoted away, for example to clear a paper jam.
- a button K protrudes outwards at the pivotable end, on which the operator can grip and pivot the respective profile.
- This button K is used for fastening to a rod (not shown) which is mounted in one of the shaped openings of the respective profile and for positioning the profile m a hole in the rear rare plate is inserted.
- the axis of rotation G, about which such a movable profile can be pivoted, is also mounted in such an opening.
- the swiveling profiles P are monitored electronically, which means that it is displayed whether they are open or closed.
- a region of origin A contains a pair of rollers 6a, 6b and a position detector 8.
- a target region B also contains a pair of rollers 14a, 14b and a position detector 16.
- a reversal region C contains a pair of rollers 10a, 10b and a position detector 12.
- the position detectors 8, 12, 16 are preferably designed as light barriers.
- Profiles P1 to P5 define the path for the paper, namely path ac between area A and area C, path ab between area A and area B, and path cb between area C and Area B.
- An active or dynamic switch unit 2 is formed in the paths from and ac.
- This switch unit 2 contains a pivotable deflection element 2a, which e.g. can be controlled electrically or pneumatically.
- the deflection element 2a of the active switch unit 2 is wedge-shaped, its tapering decision edge being directed towards the path for the sheets hm transported to the turning arrangement.
- the wedge-shaped deflecting element 2a is pivotable in the area of its base about a rotation axis 2b running perpendicular to the transport direction of the sheets and parallel to the plane of the sheets between a position b and a position c (in the state shown, the deflecting element is in position c), so that it Transport the sheets from the origin area A, to the destination area B or to the reversal area C.
- the bends slide along the cell surface Kb or Kc m or the path ac.
- a passive or static switch unit 4 is arranged on the paths ac and cb in front of the reversal area C.
- a fixed, tapered wedge 4a with a decision edge, at which it is decided in which direction the sheet is transported, is arranged in such a way that it extends from the area A derived sheets through the path ac to the reversing area C be composer is, during a reversal of the area C of the arc derived ⁇ only m the path cb to the destination area B can be be be.
- This is possible because the tapered wedge with respect to the bisector W ac of the two tangents Tl, T2 (see. Fig.
- the profile Pl of the path ac is convexly curved in the region of the wedge 4a bent away, so that the gap width s of the path ac is not narrowed and there is no increased resistance for the sheets to be transported.
- the reversal area C has the task of moving an arc brought up via the path ac between the pair of rollers 10a, 10b, until the trailing edge of the sheet has passed through the position detector 12, whereupon the rotation of the roller pair 10a, 10b is stopped and reversed, so that the sheet is moved in the opposite direction by the passive switch unit 4, but this time it is no longer back into the path ac , but m the path cb to the target area B is requested.
- two operating cases can be distinguished. If the deflecting element is in position b, the paper originating from area of origin A is transported directly to target area B. If, on the other hand, the deflection element 2a of the active switch unit 2 is in position c, the paper is first transported through the path ac through the passive switch unit 4 m to the reversing area C, in which it is first drawn in to the right and then discharged again in the opposite direction - to be eating. Due to the special shape of the paper channel, the paper sheet ejected in the opposite direction now moves path cb and finally to Target area B.
- the two operating cases determined by the position of the deflecting element 2a of the active switch unit 2 each transport an arc with one or the other of its sides upward, ie with its front side or its rear side upward, to the target area B. From from there, the turned or non-turned sheets can be fed to a post-processing unit.
- the profiles P1, P4 are screwed in tightly, while the profiles P2, P3, P5 can be pivoted, the profiles P2 and P3 being firmly connected to one another outside the path cb by webs 20, 22 and thus being pivotable only together.
- the swiveling movement takes place in each case about the axis of rotation of the profiles designated by G.
- the natural metallic surface is deliberately maintained, that is, in particular no anodizing is carried out, so that any electrostatic charge that might arise due to the movement of the paper is easily dissipated.
- FIG. 2 shows a sectional view of a second embodiment of the turning arrangement according to the invention.
- the turning arrangement contains a combination of profiles P6 to P12. Elements which correspond to those of FIG. 1 have the same reference symbols.
- the paper is turned or not turned fed to the target area B.
- the paper can also be brought from area C.
- the passive switch unit 4 it automatically takes the path to area B.
- the profiles P7 and P8 are fixed.
- the other profiles P6, P9, P10, Pll and P12 are pivotable about their respective axis of rotation G.
- FIG. 3 shows a more detailed sectional view of the dynamic switch unit 2 according to the invention with profiles P13 to P17.
- the deflecting element 2a which can be pivoted about the axis of rotation 2b, is shown m in the two positions b and c, the deflecting element 2a being drawn with a continuous line in position b and with a dash-dotted line in position c. If the deflection element 2a is in position b, an arc originating from area A is deflected to area B. If, however, the deflecting element 2a is in position c, the sheet originating from area A is transported to area C.
- the arrangement shown in FIG. 3 is a pure switch arrangement, since it has no reversing area necessary for the turning function. Both the area B and the area C serve for the further transport of the sheets.
- the dash-dotted lines show some of the profiles, e.g. the profiles P13, P14 and P16, m swung out state.
- the passive switch unit 4 shows a more detailed sectional view of the passive switch unit 4 according to the invention.
- the passive switch unit 4 is formed by three profiles P18, P19 and P20.
- the profile P18 and the profile P19 each form, together with the profile P20, a path w1 and w2, respectively, which extend upwards to the left and a path which extends upwards to the right.
- the tapered wedge 4a is firmly connected to the profile P3, the tapered decision edge of the wedge 4a essentially pointing towards the path hm coming from below.
- the tangent T1 along the path pointing upward to the left and the tangent T2 along the path pointing upward to the right span an angle with a bisector W.
- the tapered wedge 4a of the passive switch unit 4 is bent away from the direction of the bisector W.
- This special shape of the passive switch unit 4 offers two possibilities for a paper sheet to pass through the switch unit 4.
- An arc brought up from below along the arrow R3 passes the switch unit 4 along the path pointing upward to the left, which is indicated by the arrow R1. Due to the stiffness of the paper, it is impossible for the leading paper end of the sheet brought up from below in the switch unit to reach the path which is directed to the top right 4 m.
- the path to the top right can only be traversed by a paper which is guided through this path from top right along the arrow R2.
- the paper sheet brought up from the top right can pass the S-shaped area of this path with respect to the wedge 4a with the bulge 18, which wedge is bent away from the bisecting wall W. If the sheet of paper brought up from the top right is fed to a reversing unit in the area below the switch unit 4, the paper which is now moving upwards again no longer returns to the channel pointing to the top right, from which it previously came, but moves along the channel pointing upwards to the left in the direction of the arrow Rl. Here, too, the stiffness and spring action of the paper is used, which after its bending through the S-shaped area during the downward movement again aligns itself essentially in a straight line when it is transported to the top left after reversing its direction.
- FIG. 5 shows a sectional view of the turning arrangement according to the invention installed in a device with a housing 30 and which contains the profiles P21 to P25.
- the device is, for example, an electrophotographic printer.
- the built-in reversing arrangement enables paper to be dispensed either face up or face down.
- paper is first introduced through a channel along the arrow R1 to the turning arrangement according to the invention.
- the paper then passes through area A and is then depending on the position of the active switch unit 2 is transported along the path to the area B, from which it is fed along the arrow R2, for example to a post-processing unit.
- the image side of the single sheet faces upwards.
- the active switch unit 2 m If the active switch unit 2 m is switched over to its other position, the arc which is brought along the arrow R1 over the area A is deflected to the left, crosses the path ac and the passive switch unit 4, in order finally to reach the area C, where it initially is drawn in and then ejected again and is finally transported along the path cb to the area B. Now the picture side of the paper sheet is at the bottom, so that the paper is fed to the post-processing unit in the reversed state.
- All distances along the path elements between successive pairs of rollers must be shorter in the arrangements according to the invention than the length of the paper sheet transport direction to be transported.
- Each pair of rollers is em position detector z.
- a first area or area of origin A first area or area of origin
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19643666 | 1996-10-22 | ||
DE19643666 | 1996-10-22 | ||
PCT/DE1997/002431 WO1998017570A1 (en) | 1996-10-22 | 1997-10-20 | Reversing mechanism for sheet-like items |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0934224A1 true EP0934224A1 (en) | 1999-08-11 |
EP0934224B1 EP0934224B1 (en) | 2001-06-13 |
Family
ID=7809513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97947696A Expired - Lifetime EP0934224B1 (en) | 1996-10-22 | 1997-10-20 | Reversing mechanism for sheet-like items |
Country Status (4)
Country | Link |
---|---|
US (1) | US6129349A (en) |
EP (1) | EP0934224B1 (en) |
DE (2) | DE59703823D1 (en) |
WO (1) | WO1998017570A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6328303B1 (en) * | 1997-11-13 | 2001-12-11 | Canon Kabushiki Kaisha | Image forming apparatus with built-in surface reverse path |
US6398212B1 (en) * | 1998-12-18 | 2002-06-04 | Canon Kabushiki Kaisha | Sheet surface reversing device and image forming apparatus having the same |
DE20006890U1 (en) * | 2000-04-14 | 2000-06-21 | NexPress Solutions LLC, Rochester, N.Y. | Three-way switch |
DE10024206A1 (en) * | 2000-05-17 | 2001-11-22 | Nexpress Solutions Llc | Paper guide |
JP3805269B2 (en) * | 2002-03-13 | 2006-08-02 | キヤノン株式会社 | Sheet guide apparatus and image forming apparatus provided with the apparatus |
US7108260B2 (en) * | 2003-12-19 | 2006-09-19 | Palo Alto Research Center Incorporated | Flexible director paper path module |
US7185888B2 (en) * | 2004-03-29 | 2007-03-06 | Palo Alto Research Center Incorporated | Rotational jam clearance apparatus |
US7512455B2 (en) * | 2004-03-29 | 2009-03-31 | Palo Alto Research Center Incorporated | Method for self-synchronization of modular production systems |
US7606632B2 (en) * | 2004-06-16 | 2009-10-20 | Cryovac, Inc. | Apparatus for dispensing activated monitoring devices |
DE102004031172A1 (en) * | 2004-06-28 | 2006-01-12 | Eastman Kodak Co. | Device for handling a printing material |
US8172228B2 (en) * | 2009-03-26 | 2012-05-08 | Xerox Corporation | Integrated module |
CN101987700B (en) * | 2009-07-31 | 2013-06-05 | 山东新北洋信息技术股份有限公司 | Recording medium turnover mechanism and recording medium processing device using same |
DE102009052379A1 (en) | 2009-11-09 | 2011-05-12 | Wincor Nixdorf International Gmbh | Device for handling notes of value |
DE102011000785A1 (en) * | 2011-02-17 | 2012-08-23 | Wincor Nixdorf International Gmbh | Device for debiting checks |
CN102139818B (en) | 2011-04-13 | 2013-03-06 | 广州广电运通金融电子股份有限公司 | Guider for conveying sheets |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5922848A (en) * | 1982-07-28 | 1984-02-06 | Canon Inc | Reversing apparatus for sheet |
GB8315734D0 (en) * | 1983-06-08 | 1983-07-13 | Xerox Corp | Sheet reversing apparatus |
JPS60137759A (en) * | 1983-12-27 | 1985-07-22 | Toshiba Corp | Paper sheet transport apparatus |
JPS61132578A (en) * | 1984-11-30 | 1986-06-20 | 京セラ株式会社 | Metallization of ceramic |
US4921236A (en) * | 1986-06-05 | 1990-05-01 | Ricoh Company, Ltd. | Recycling automatic document feeder |
JPH0423888Y2 (en) * | 1986-08-20 | 1992-06-04 | ||
JPH062552B2 (en) * | 1986-08-27 | 1994-01-12 | 富士ゼロックス株式会社 | Paper feeder for copier |
DE3807808A1 (en) * | 1988-03-10 | 1989-09-21 | Philips Patentverwaltung | OFFICE MACHINE, e.g. PRINTER |
DE8803496U1 (en) * | 1988-03-15 | 1988-05-11 | Nixdorf Computer Ag, 4790 Paderborn | Printer with a plurality of output channels for recording media |
DE3914183A1 (en) * | 1988-05-01 | 1989-11-09 | Minolta Camera Kk | TRANSPORTATION DEVICE FOR PAPER SHEETS |
US5014976A (en) * | 1990-04-04 | 1991-05-14 | Xerox Corporation | Exit roller shield for duplex printing |
JPH05310356A (en) * | 1992-05-07 | 1993-11-22 | Fuji Xerox Co Ltd | Paper turning-over device |
US5303017A (en) * | 1993-05-07 | 1994-04-12 | Xerox Corporation | Print skip avoidance for on-line compiling |
US5415391A (en) * | 1994-05-31 | 1995-05-16 | Xerox Corporation | Low cost compact inverter |
US5449164A (en) * | 1994-08-29 | 1995-09-12 | Xerox Corporation | Sheet inverter apparatus |
US5629762A (en) * | 1995-06-07 | 1997-05-13 | Eastman Kodak Company | Image forming apparatus having a duplex path and/or an inverter |
-
1997
- 1997-10-20 US US09/284,921 patent/US6129349A/en not_active Expired - Lifetime
- 1997-10-20 DE DE59703823T patent/DE59703823D1/en not_active Expired - Fee Related
- 1997-10-20 EP EP97947696A patent/EP0934224B1/en not_active Expired - Lifetime
- 1997-10-20 WO PCT/DE1997/002431 patent/WO1998017570A1/en active IP Right Grant
- 1997-10-20 DE DE19781155T patent/DE19781155D2/en not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO9817570A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0934224B1 (en) | 2001-06-13 |
US6129349A (en) | 2000-10-10 |
DE19781155D2 (en) | 1999-10-28 |
WO1998017570A1 (en) | 1998-04-30 |
DE59703823D1 (en) | 2001-07-19 |
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