EP0280060A1 - Dispositif de transport pour des feuilles - Google Patents

Dispositif de transport pour des feuilles Download PDF

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Publication number
EP0280060A1
EP0280060A1 EP88101194A EP88101194A EP0280060A1 EP 0280060 A1 EP0280060 A1 EP 0280060A1 EP 88101194 A EP88101194 A EP 88101194A EP 88101194 A EP88101194 A EP 88101194A EP 0280060 A1 EP0280060 A1 EP 0280060A1
Authority
EP
European Patent Office
Prior art keywords
transport
pressure
sheet material
transport device
plane
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
Application number
EP88101194A
Other languages
German (de)
English (en)
Other versions
EP0280060B1 (fr
Inventor
Adam Dr. Pawlowski
Günter Baitz
Wolfgang Malke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wincor Nixdorf International GmbH
Original Assignee
Wincor Nixdorf International GmbH
Nixdorf Computer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wincor Nixdorf International GmbH, Nixdorf Computer AG filed Critical Wincor Nixdorf International GmbH
Publication of EP0280060A1 publication Critical patent/EP0280060A1/fr
Application granted granted Critical
Publication of EP0280060B1 publication Critical patent/EP0280060B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/14—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors by photoelectric feelers or detectors
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance
    • B65H2511/224—Nip between rollers, between belts or between rollers and belts

Definitions

  • the invention relates to a transport device for sheet material, with a plurality of elastically deformable transport rollers arranged on a common drive axis, which can be adjusted in a plane transverse to the transport plane, each of which forms a transport gap for the sheet material with a plurality of harder counter elements held opposite them and held on a pendulum yoke.
  • a transport device of this type is known from DE-OS 35 11 387 and shown there in Fig. 11.
  • the drive axis of the transport rollers can be adjusted transversely to the transport plane, so that the transport rollers can be used in addition to their transport function as a sensor arrangement that determines the thickness of the sheet material to be transported in order to be able to adjust or control the distance of a printhead in the transport path from a pressure bar.
  • two transport rollers are at a distance on the drive axis arranged to each other, and the drive axis is fixed at one end, but pivoted, while its other end can be moved against the force of a spring in the direction transverse to the transport plane.
  • Pressure rollers which are rotatably mounted on the pendulum yoke, are assigned to the transport rollers as counter elements.
  • the pendulum yoke is pivotally mounted on a pendulum axis between the pressure rollers in the pivot plane of the drive axis of the transport rollers. This possibility of relocating the pressure rollers by pivoting the pendulum yoke leads to a constant pressure force of both transport rollers on the recording medium which is conveyed between the transport rollers and the pressure rollers.
  • Such a transport device works satisfactorily with simple sheet material.
  • the sheet material consists of a plurality of sheets lying one above the other, which are firmly connected to one another at their upper and / or lower edge, displacements of the individual sheets can occur relative to one another, which, due to the firm mutual connection of the sheets at their edge, lead to bulges, which then form folds in the transport gap between the respective two rollers and deform the sheet material as a whole so that proper further transport is no longer possible.
  • Such phenomena are particularly evident in multiple documents, e.g. are to be printed in POS printers and there is copy paper between their individual slip sheets that has a particularly smooth surface. If the sheet material is deformed or distorted in the manner described above, it is then no longer possible to properly print such multiple receipts at precisely specified locations.
  • transport disturbances are attributed to the fact that the transport rollers are made of an elastically deformable material exist, which is pressed in by the pressure of the harder pressure rollers in the area of the transport nip, so that the sheet material lies in a transport nip which is bent in accordance with the impression, in which it has varying degrees of frictional contact with the transport rollers and the pressure rollers.
  • the storage of the transport and pressure rollers is never possible without play and additional tolerances are caused by the suspension of the pressure rollers on a pendulum yoke and by the adjustability of the drive axis of the transport rollers, further differences in the transport effect on the top and bottom of a multiple can - sheet material occur.
  • a counter element that is stationary in the transport direction instead of a pressure roller offers the particular advantage that such a counter element can take on further tasks that have to be performed in the automatic control of a transport device. For example, it is possible to install light barriers in a counter element that is stationary in the transport direction, so that the arrival of an upper or lower edge of the sheet in the transport nip can be recognized almost immediately and, when using the transport device in a printer, better use of space when printing of the sheet material is possible.
  • the pressure surface advantageously merges at its rear end in the transport direction into an inclined surface which widens the transport gap in a funnel shape. This design facilitates the permissible insertion of the sheet material into the transport nip, since it gives it an entry form similar to that of a pressure roller.
  • the pressure surface is advantageously the end surface of a pressure body, the width of which transversely to the transport direction corresponds at least to the width of the transport roller opposite it. If there are several transport rollers then that is, several pressure bodies are provided on the pendulum yoke, each of which faces a transport roller.
  • the width of each pressure body can also be dimensioned so that a pressure body is provided for several transport rollers. This is particularly advantageous if the transport rollers are next to each other at a relatively short distance.
  • the pressure surface is expediently polished in order to keep its coefficient of friction as low as possible. Depending on the material of the pressure surface, this is important for the proper functioning of the transport device in the sense described above.
  • the pendulum yoke and the pressure body can be formed in one piece.
  • they are advantageously formed from plastic and, for example, manufactured as a single injection molded body. It is essential that the plastic material used is harder than that of the transport rollers.
  • a transport device which contains a drive axle 10 with two transport rollers 11 and 12.
  • the drive shaft 10 is at one end 13 in hers Longitudinally fixed, but pivotally mounted in a bearing arrangement 14 and can be moved with its other end 15 against the force of a spring 16 in the direction of arrow 17 to make an adjustment for the thickness evaluation of a sheet material 18 which is to be transported and with the transport rollers 11 and 12 is shown in Fig. 1 by a dashed line parallel to the drive axis 10.
  • a pendulum yoke 19 is provided, which is pivotally suspended on a pendulum axis 20 in the pivot plane of the drive axis 10.
  • the pendulum yoke 19 carries two pressure bodies 21 and 22, which each face a transport roller 11 and 12 and in the exemplary embodiment shown have a width which corresponds to that of the transport rollers 11 and 12.
  • the pendulum yoke 19 can be pivoted in the direction of the arrow 23 and is mounted on the pendulum axis 20 with a bearing block 24.
  • the pendulum axis 20 is fixed in a housing, not shown.
  • the pivot bearing 14 is arranged in a stationary manner and the spring 16 is connected to a stationary point.
  • the housing can be a printer housing in which the transport device is arranged in order to feed the sheet material 18 in the direction perpendicular to the drawing plane of a printing station.
  • the two pressure bodies 21 and 22 have a flat end face 25 or 26, which faces the respective transport roller 11 or 12. This end face 25 or 26 merges at its rear end in the transport direction into an inclined surface 27 or 28 which prevents the sheet material 18 from being introduced into the respective transport gap 29 or between a transport roller 11 or 12 and an end face 25 or 26. 30 relieved.
  • the pendulum yoke 19 follows this movement by correspondingly pivoting in the direction of the arrow 23. In this way, there is always a constant pressure between the transport rollers 11 and 12 and the respective pressure element 21 and 22 ensures that there is a smooth and tilt-free transport of the sheet material 18.
  • Fig. 2 shows the transport device seen from its right side.
  • the drive shaft end 13 and the transport roller 12 are shown, which rotates in the direction of the arrow 31 and transports the sheet material 18 in the direction of the arrow 32.
  • the transport roller 20 faces the pressure body 22 which is arranged on the pendulum yoke 19.
  • Its end face 26 is the pressure surface facing the transport roller 12, which has the lowest possible frictional resistance with respect to the upper side of the sheet material 18 and is polished for this purpose.
  • the pressure surface 26 merges at its rear end in the transport direction 32 into the inclined surface 28, which forms a funnel-shaped extension with the transport roller 12 at the entry point of the transport gap 30.
  • the transport roller 12 Since the transport roller 12 consists of an elastically deformable material that is softer than the material of the pressure body 22, the transport roller 12 is flattened in the area of mutual interaction with the pressure body 22 so that it forms a flat transport gap 30 with the pressure surface 26. A flat surface is thus present on both sides of the sheet material 18, the transport roller 12 with its flattening having a large frictional resistance and the pressure surface 26 of the pressing body 22 having a small frictional resistance to the sheet material 18. This is transported in a transport plane that is not curved. Since the pressure body 22 is arranged stationary in the transport direction 32, the sheet material 18 slides on the Pressure surface 26. The uppermost sheet of a multiple sheet material is practically not braked by the influence of friction on the pressure surface 26, so that it cannot shift relative to other, underlying sheets.
  • Fig. 2 shows dashed lines in the pressure body 22 light barrier elements 33, which can be light guides, for example. These can be inserted or cast into the pressure body 22 and end with their light-receiving surface in the pressure surface 26.
  • the advantage of a pressure body 22 which is stationary in the transport direction 32 is used, which consists in the fact that it can also be a carrier for evaluation elements due to this stationary arrangement which determine the movement of the sheet material 18.
  • Such evaluation elements must be provided outside the area of these pressure rollers in transport devices in which the pressure rollers face pressure rollers.
  • Another advantage of the light barrier arrangement is that the drive for the transport rollers only has to be switched on when the sheet material 18 is immediately in front of the transport gap 30, and can be switched off immediately when the sheet material 18 leaves the transport gap 30. This minimizes the time in which the transport rollers 11 and 12 rub directly against the pressure surfaces 25 and 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP19880101194 1987-02-27 1988-01-27 Dispositif de transport pour des feuilles Expired - Lifetime EP0280060B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8703083U 1987-02-27
DE8703083U DE8703083U1 (de) 1987-02-27 1987-02-27 Transportvorrichtung für Blattmaterial

Publications (2)

Publication Number Publication Date
EP0280060A1 true EP0280060A1 (fr) 1988-08-31
EP0280060B1 EP0280060B1 (fr) 1990-11-07

Family

ID=6805320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880101194 Expired - Lifetime EP0280060B1 (fr) 1987-02-27 1988-01-27 Dispositif de transport pour des feuilles

Country Status (2)

Country Link
EP (1) EP0280060B1 (fr)
DE (2) DE8703083U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0448384A2 (fr) * 1990-03-22 1991-09-25 AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. Appareil pour le transport de documents
US5199702A (en) * 1992-03-26 1993-04-06 Xerox Corporation Sheet transport apparatus
EP0659667A1 (fr) * 1993-12-20 1995-06-28 Canon Kabushiki Kaisha Appareil d'avancement de feuilles et appareil de triage de feuilles avec un tel dispositif

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2072150A (en) * 1979-09-28 1981-09-30 Ricoh Kk Transferring sheets from copier to sorter apparatus
DE3511387A1 (de) * 1985-03-28 1986-10-16 Nixdorf Computer Ag, 4790 Paderborn Druckwerk mit einem in druckzeilenrichtung verfahrbaren druckkopf und einem als druckgegenlager dienenden druckbalken

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2104166B1 (fr) * 1971-01-29 1972-08-24 Mathias Baeurle Gmbh
US3815899A (en) * 1973-03-19 1974-06-11 Xerox Corp Sheet delivery device
JPS5330498B2 (fr) * 1973-03-26 1978-08-28

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2072150A (en) * 1979-09-28 1981-09-30 Ricoh Kk Transferring sheets from copier to sorter apparatus
DE3511387A1 (de) * 1985-03-28 1986-10-16 Nixdorf Computer Ag, 4790 Paderborn Druckwerk mit einem in druckzeilenrichtung verfahrbaren druckkopf und einem als druckgegenlager dienenden druckbalken

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0448384A2 (fr) * 1990-03-22 1991-09-25 AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. Appareil pour le transport de documents
EP0448384A3 (fr) * 1990-03-22 1991-10-16 AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. Appareil pour le transport de documents
US5199702A (en) * 1992-03-26 1993-04-06 Xerox Corporation Sheet transport apparatus
EP0562808A1 (fr) * 1992-03-26 1993-09-29 Xerox Corporation Appareil de transport de feuilles
EP0659667A1 (fr) * 1993-12-20 1995-06-28 Canon Kabushiki Kaisha Appareil d'avancement de feuilles et appareil de triage de feuilles avec un tel dispositif
US5865434A (en) * 1993-12-20 1999-02-02 Canon Kabushiki Kaisha Sheet conveying apparatus and sheet sorting apparatus using the same

Also Published As

Publication number Publication date
DE3860954D1 (de) 1990-12-13
EP0280060B1 (fr) 1990-11-07
DE8703083U1 (de) 1987-06-11

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