EP0387476B1 - Vereinzelungsvorrichtung für Bögen mittels einer Turbulenzblasdüse - Google Patents

Vereinzelungsvorrichtung für Bögen mittels einer Turbulenzblasdüse Download PDF

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Publication number
EP0387476B1
EP0387476B1 EP89870041A EP89870041A EP0387476B1 EP 0387476 B1 EP0387476 B1 EP 0387476B1 EP 89870041 A EP89870041 A EP 89870041A EP 89870041 A EP89870041 A EP 89870041A EP 0387476 B1 EP0387476 B1 EP 0387476B1
Authority
EP
European Patent Office
Prior art keywords
sheets
sheet
stack
air flow
direct
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.)
Expired - Lifetime
Application number
EP89870041A
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English (en)
French (fr)
Other versions
EP0387476A1 (de
Inventor
Guy Martin
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.)
Individual
Original Assignee
Individual
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
Priority to EP89870041A priority Critical patent/EP0387476B1/de
Priority to US07/768,400 priority patent/US5328165A/en
Priority to DE68915457T priority patent/DE68915457T2/de
Priority to EP89903067A priority patent/EP0470951A1/de
Priority to AT8989870041T priority patent/ATE105668T1/de
Application filed by Individual filed Critical Individual
Priority to ES89870041T priority patent/ES2049845T3/es
Priority to PCT/BE1989/000012 priority patent/WO1990011240A1/fr
Publication of EP0387476A1 publication Critical patent/EP0387476A1/de
Application granted granted Critical
Publication of EP0387476B1 publication Critical patent/EP0387476B1/de
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
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/48—Air blast acting on edges of, or under, articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/12—Suction bands, belts, or tables moving relatively to the pile
    • B65H3/124—Suction bands or belts
    • B65H3/128—Suction bands or belts separating from the top of pile

Definitions

  • the present invention relates to a device for automatically and regularly picking up flat sheets, for example sheets of paper, on a stack of sheets feeding a machine in which flat sheets move one by one, for example an assembly machine.
  • Friction devices use constant pressure maintained on the sheet by means of pads or casters.
  • the pressure adjustment is delicate, which only allows the treatment of a fairly limited range of sheets and does not allow the treatment of very thin sheets, for example delicate papers.
  • the suction and friction devices are not insensitive to variations in the parameters which characterize the sheets to be taken from a pile: physical dimensions, weight and size of the sheets; their humidity, their mutual adhesion, static electricity, these parameters also being randomly variable within the same stack of leaves of the same nature.
  • physical dimensions, weight and size of the sheets Considering in particular sheets of paper, it should be noted that the consumption of paper is changing in the direction of a constant increase in the use of delicate papers, for example carbonless papers. Friction machines currently known do not meet the working conditions in this area, and suction machines hardly meet them.
  • a stack of sheets of paper for example, is characterized by various parameters such as size and weight of sheets, static electricity, humidity, mutual adhesion due to the freshness of the printing ink. These parameters are randomly variable within the same stack of paper of the same kind. This is the cause of problems in the separation of sheets in assembly machines, hence the need for pre-treatment before going through the machine.
  • the present invention provides a solution to this problem and has as its object a device for efficiently fading a stack of sheets placed in the feeding compartment of a machine so as to ensure the delivery of the sheets one by one, even in the if sheets stick to each other or if the top sheet cannot be taken from the stack of sheets.
  • a feed box of an exemplary assembly machine Above a feed table 1 is mounted a sheet pickup device 2.
  • the sheet pickup device illustrated by way of example comprises a perforated grid 4 mounted on a frame of the assembly so as to be able to move by translation under the action of a drive mechanism comprising in particular the toothed wheels and rollers 5.
  • the grid 4 is closed on itself and it has a section 6 which can move above the table 1 in the direction of the ejection area 3.
  • a suction means constituted for example by fans 7.
  • a deflector 9 mounted above the ejection area 3 and extending over the entire transverse width of the device advantageously closes the top of the ejection area.
  • the upper sheets of the stack vibrate and the top sheet bends, comes into contact with the grid 6 and is held there glued by suction through the grid. .
  • This sheet is then driven by the grid 6 when the latter is set in motion and it is guided towards the ejection area 3 while the next sheet is sucked against the grid. The sheets are thus sucked one by one and routed successively to the ejection area.
  • the relative distance between the lower plane 6 of the grid and the top of the stack of sheets on the feed table is kept constant as the height of the stack of sheets decreases.
  • the feed table 1 is for example mounted on a mechanism intended to move it vertically as the height of the stack of sheets decreases so as to maintain the top of the stack at a constant distance from the section of grid 6.
  • the sheet picking device could be mounted so as to be itself displaced relative to the feed table 1 which would be fixed.
  • the control of all the organs can be integrated into a general automatic control programming of the device under the surveillance of detection elements controlled by a processor which can be incorporated into the machine.
  • Detection elements are provided for monitoring the operation of the sheet picking device.
  • a detection element is used to detect the presence or absence of sheets on the feed table 1.
  • Several detection elements can be arranged with predetermined spacings so as to be able to detect the format of the sheets stacked on the table supply 1 and order the commissioning of the desired number of fans 7 and a detection element is used to control the passage of the sheets in the ejection area 3.
  • the deflaming device is designated as a whole at 10. It comprises an air flow generator constituted, for example, by a turbine 15 extending along the bottom wall 18 of the feed table 1, under the ejection area 3, and this turbine 15 is associated with deflector means arranged so as to direct at least one air flow turbulent practically on the front side of the upper sheets of the stack of sheets 100 as will be seen.
  • the box bottom wall 18 has several openings 19; these are clearly visible in Figure 2. These openings 19 are normally closed by a shutter formed by a valve 21 mounted to be able to pivot around an axis 22 fixed at its ends to the frame of the machine. The tilting of the valve 21 takes place by means of a connecting rod 27 mounted at one end of the valve 21 and driven by an electromagnet 16 as shown in the view of FIG. 3.
  • valves 23 and 25 whose role will be described later. These upper valves are mounted so that they can pivot around the axes 24 and 26 fixed to the frame of the machine.
  • the valves 23 and 25 are actuated by connecting rods 28 and 29 mounted at one end of the valves and driven by an electromagnet 17 as shown in the view of FIG. 4.
  • the descaling device 10 is controlled by a control processor which can be the general control processor of the machine.
  • the processor cooperates with a detection device arranged to permanently monitor the presence of the sheets in the free space 8 in the vicinity of the grid section 6 and to detect any operating anomaly on the grid: absence sheet, presence of several sheets glued to each other, crumpled or folded sheet, sheet of different thickness or print, etc.
  • the detection device is a thickness detector mounted and arranged to control permanently the thickness of material located in front of the grid section 6 of the sheet pickup device 2.
  • the thickness detector consists of a photoelectric cell 11 responding to a light beam generated by a source 12.
  • the detector cell 11 produces an electrical signal which is a function of the thickness of the material intercepting the light beam at a location that is always identical.
  • the control system of the descaling device is represented by the block diagram of FIG. 5.
  • the control unit 14 of the microprocessor receives the detection signal D generated by the detector 11 and compares it with a setpoint R extracted from a reference memory 13.
  • the instruction R represents a value or a range of values of the detection signal corresponding to the presence of a calibrated sheet.
  • the limit values of a predetermined reference range of values will be designated for example by R1 and R2.
  • the microprocessor is organized so that the control unit 14 produces a control signal for one or the other of the electromagnets 16 and 17 which control the deflector means according to the value of the detection signal D relative to the values of reference R1 and R2.
  • the detection signal D is included between the reference signals R1 and R2 and the microprocessor does not command any correction.
  • the valves 21, 23 and 25 are then held in their closed position as shown in Figure 1 and the turbine 15 is stopped.
  • the sheet driven by the grid 6 is then routed towards the ejection area 3.
  • the sheet in question, identified as corresponding to the reference value, then moves to a detection cell located downstream of a pressure member consisting of the rollers 31 and 32: the roller 31 is in continuous rotation and roller 32 is mounted to be lifted under the control of an electromagnet (not shown) so as to pinch the ejected sheet and advance it towards the output members.
  • the detection cell 11 produces a signal D of value greater than the reference signal R2 and the microprocessor 14 produces a first signal of CD1 command to excite the electromagnet 16 driving the lower valve 21 in order to move the latter downwards and gradually bring it into its open position illustrated in FIG. 6 while the turbine 15 is turned on .
  • the valve drive mechanism 21 In Figure 6 is not shown the valve drive mechanism 21.
  • the air flow generated by the turbine 15 is guided by the channel A towards the openings 19 and is thus directed on the front side of the stack sheets 100.
  • the leaves are then raised in a fan and the upper sheet 101 is sucked against the grid 6 while the other sheets fall on the stack 100 by the air which creeps between the upper sheet and the next sheet.
  • the device is restored to the rest state as soon as the detection cell 11 detects the presence of a sheet 101 in its detection field. As long as it meets the required conditions, this sheet is then drawn towards the ejection area 3.
  • the detection signal D produced by the cell 11 is lower than the reference signal R1 and the microprocessor 14 produces a second control signal CD2 to excite the electromagnet 17 which drives the upper valves 23 and 25 in order to place them in the positions shown in FIG. 7. In order not to overload this figure, the mechanism for driving the valves 23 and 25 is not shown there.
  • the air flow generated by the turbine 15 is then directed through the channel B towards the ejection area 3 and it is thus directed towards the front edge of the sheets located in the detection field of the cell 11.
  • the sheets vibrate and the air flow B creeps between the sheets so that the upper sheet 101 is sucked against the grid 6 while the other sheets are folded over the stack of sheets 100.
  • the device is restored to the resting state as soon as the detection cell 11 detects the presence of the single sheet 101 in its detection field and provided that it meets the required conditions, this sheet is then drawn towards the area d ejection 3.
  • the de-scaling device ensures the removal of sheets one by one. Any leaf picking anomaly is identified within the system without the leaf being moved from its original pile. A sheet is only delivered to the ejection area 3 when it meets the required conditions, which considerably reduces waste and operator intervention.
  • the system automatically adjusts its rate according to the quality of the sheets to be treated. It makes it possible to reach high rates at the exit of the box in good conditions. Finally it makes it possible to detect a sheet which is not of the same impression, a sheet of different thickness, a crumpled or folded sheet.
  • the range of papers that can be treated is very wide, for example from 10 grams to 300 grams, or even more in some cases.
  • the descaling device according to the invention can be combined with any sheet picking device, for example a common suction sheet picking device.
  • any sheet picking device for example a common suction sheet picking device.
  • the combination of the de-scaling device according to the invention with a suction device for picking up sheets as described in the foregoing and illustrated by way of example in the accompanying drawings is particularly advantageous by the optimal result which results therefrom. term of efficiency and flow.
  • This arrangement according to the invention made it possible to produce a flow rate of the order of 130 sheets per minute with a feed box.
  • the advantages of the device according to the invention are particularly attractive for feeding a collator comprising several sheets feeding boxes.
  • the regular flow of strictly controlled sheets makes it possible to ensure a perfect superposition of the sheets in the assembly system thanks to the synchronization of the control of the pressing members 31 and 32 of each box.
  • the control pulses successively actuate the pressing members of each box so as to advance the sheets successively towards a conveyor belt 33 circulating on the cylinders 34, 35 and 36.
  • the sheets delivered by a feed box are advantageously pressed between the carpet 33 and a carpet 37 which rolls on the cylinders 38 and 39.
  • the carpet 37 can extend over the entire height of the collator.
  • the sheets delivered by any feed box overlap the sheets delivered by the upper feed boxes and the bundle of superimposed sheets, pressed between a belt 33 and the belt 37, is brought to the ejection zone of the assembler.
  • the detection elements as well as other more usual control organs are advantageously controlled by a processor which constitutes the management organ of the entire device. Its programming gives rise to interactive servos with a view, for example and without limitation, to controlling the starting, stopping and speed of the motors of the fans, to controlling and modulating the effects of the fan-off device, to controlling the translation of the grid, to maintain the relative distance between the lower plane of the grid and the top of the stack of sheets as a function of the detection information permanently supplied by the aforementioned detection elements.
  • This programmed arrangement makes it possible to continuously monitor the operation of the sheet picking device and to check in particular the nature of each sheet taken from the top of the stack so as to immediately detect any anomaly before transfer to the ejection area and stop the device automatically to remedy the anomaly, then restart the machine. Reliability and efficiency of the automation are improved in an optimal manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Controlling Sheets Or Webs (AREA)

Claims (3)

  1. Vereinzelungsvorrichtung für ebene Bögen eines auf einem Zuführtisch (1) angeordneten Bogenstapels, mit einer Entnahmevorrichtung (10) mit einem Luftstromgenerator (15), Führungseinrichtungen (A, B), die zum Lenken eines vom Generator (15) erzeugten Turbulenzluftstroms auf wenigstens eine Seite des Bogenstapels vorgesehen sind, und einer Steuervorrichtung (14), die auf ein von einem oberhalb des Zuführtisches (1) angebrachten Detektor (11) erzeugtes Detektionssignal (D) zum Erkennen der Anwesenheit oder der Dicke eines Bogens auf der Bogenvereinzelungsvorrichtung anspricht, dadurch gekennzeichnet, daß die Steuervorrichtung (14) abhängig vom Detektionssignal (D) entweder zum Lenken des Luftstroms durch einen ersten Kanal (A) anspricht, so daß die Bögen fächerförmig vom Bogenstapel (100) abgehoben werden und das oberste Blatt (101) gegen die Bogenvereinzelungsvorrichtung (2) angesaugt wird, oder zum Lenken des Luftstroms durch einen zweiten Kanal (B), so daß die von oben vom Bogenstapel (100) abgehobenen Bögen in Vibration versetzt werden und daß diese Bögen, außer dem obersten Bogen (101), auf den Bogenstapel (100) heruntergebogen werden, oder zum Unterbrechen des Luftstroms.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuervorrichtung (14) ein erstes Steuersignal (CD1) erzeugt, um eine Führungseinrichtung (21) zum Lenken des Luftstroms durch den ersten Kanal (A) in Gang zu setzen, wenn das Detektionssignal (D) größer als ein vorbestimmtes Vergleichssignal (R2) ist.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuervorrichtung (14) ein zweites Steuersignal (CD2) erzeugt, um eine Führungseinrichtung (23, 25) zum Lenken des Luftstroms durch den zweiten Kanal (B) in Gang zu setzen, wenn das Detektionssignal (D) kleiner als das vorbestimmte Vergleichssignal (R1) ist.
EP89870041A 1989-03-17 1989-03-17 Vereinzelungsvorrichtung für Bögen mittels einer Turbulenzblasdüse Expired - Lifetime EP0387476B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US07/768,400 US5328165A (en) 1989-03-17 1989-03-17 Device for the take-up of plane sheets with peel-off by turbulent air flow
DE68915457T DE68915457T2 (de) 1989-03-17 1989-03-17 Vereinzelungsvorrichtung für Bögen mittels einer Turbulenzblasdüse
EP89903067A EP0470951A1 (de) 1989-03-17 1989-03-17 Bogenabgabevorrichtung mit turbulenter luftströmung
AT8989870041T ATE105668T1 (de) 1989-03-17 1989-03-17 Vereinzelungsvorrichtung fuer ebene boegen mittels einer turbulenzblasduese
EP89870041A EP0387476B1 (de) 1989-03-17 1989-03-17 Vereinzelungsvorrichtung für Bögen mittels einer Turbulenzblasdüse
ES89870041T ES2049845T3 (es) 1989-03-17 1989-03-17 Dispositivo de toma de hojas planas con deshojamiento con flujo de aire turbulento.
PCT/BE1989/000012 WO1990011240A1 (fr) 1989-03-17 1989-03-17 Dispositif de prise de feuilles planes avec deramage a flux d'air turbulent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89870041A EP0387476B1 (de) 1989-03-17 1989-03-17 Vereinzelungsvorrichtung für Bögen mittels einer Turbulenzblasdüse

Publications (2)

Publication Number Publication Date
EP0387476A1 EP0387476A1 (de) 1990-09-19
EP0387476B1 true EP0387476B1 (de) 1993-12-29

Family

ID=8203278

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89870041A Expired - Lifetime EP0387476B1 (de) 1989-03-17 1989-03-17 Vereinzelungsvorrichtung für Bögen mittels einer Turbulenzblasdüse
EP89903067A Pending EP0470951A1 (de) 1989-03-17 1989-03-17 Bogenabgabevorrichtung mit turbulenter luftströmung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP89903067A Pending EP0470951A1 (de) 1989-03-17 1989-03-17 Bogenabgabevorrichtung mit turbulenter luftströmung

Country Status (6)

Country Link
US (1) US5328165A (de)
EP (2) EP0387476B1 (de)
AT (1) ATE105668T1 (de)
DE (1) DE68915457T2 (de)
ES (1) ES2049845T3 (de)
WO (1) WO1990011240A1 (de)

Families Citing this family (14)

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DE4105967C2 (de) * 1990-04-27 1993-11-25 Heidelberger Druckmasch Ag Bogenanleger mit Blasdüsen zur Erzeugung von Tragluft unter dem oberen, vom Bogenstapel abgehobenen Bogen
GB2276872B (en) * 1993-04-07 1997-01-22 Licentia Gmbh Apparatus for separately removing flat articles from a stack
US5722811A (en) * 1994-08-29 1998-03-03 Asomm, Inc. Method for separating a predetermined number of sheets from a stack of sheets
US5984622A (en) * 1994-08-29 1999-11-16 Asomm, Inc. Method and apparatus for separating a predetermined number of sheets from a stack of sheets
NL1013218C2 (nl) * 1999-10-05 2001-04-06 Ocu Technologies B V Inrichting voor het ÚÚn voor ÚÚn afvoeren van vellen vanaf de bovenkant van een stapel vellen.
SE524028C2 (sv) * 2002-05-10 2004-06-15 Nybohov Dev Ab Anordning för inmatning av buntar av t ex sedlar i en maskin
US6955348B2 (en) * 2002-09-20 2005-10-18 Canon Kabushiki Kaisha Sheet feeder which separates sheets with variable speed and/or direction blown air and image forming apparatus using same
CN100462294C (zh) * 2002-09-20 2009-02-18 佳能株式会社 纸张供给装置和图象形成装置
DE10250146A1 (de) * 2002-10-28 2004-05-13 OCé PRINTING SYSTEMS GMBH Einzelblatt-Zuführvorrichtung für einen Drucker
US10080470B2 (en) * 2009-09-18 2018-09-25 Kitchens.Com Paper-towel apparatus for reusing non-structured paperless paper-towels
DE102010006760A1 (de) * 2010-02-04 2011-08-04 AMB Apparate + Maschinenbau GmbH, 86462 Vereinzelungsvorrichtung zum stückweisen Bereitstellen von scheibenförmigen Elementen aus einem in einer Flüssigkeit angeordneten Stapel
US11220409B2 (en) * 2011-10-31 2022-01-11 Ncr Corporation Single item removal
JP6801313B2 (ja) * 2016-09-07 2020-12-16 コニカミノルタ株式会社 給紙装置及び給紙方法
JP7490972B2 (ja) * 2020-02-03 2024-05-28 富士フイルムビジネスイノベーション株式会社 記録材搬送装置および画像形成装置

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0110649A2 (de) * 1982-11-24 1984-06-13 Tektronix, Inc. Blattfördervorrichtung für ein Kopiergerät
GB2164926A (en) * 1984-09-27 1986-04-03 Xerox Corp Air-assisted top sheet feeder
EP0273898A2 (de) * 1986-12-30 1988-07-06 Guy Martin Vorrichtung zum Entstapeln von Bögen

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US3627308A (en) * 1970-05-25 1971-12-14 Eastman Kodak Co Sheet separator
FR2521962B1 (fr) * 1982-02-19 1985-12-27 Hotchkiss Brandt Sogeme Depileur d'objets plats tels que les plis postaux
US4699369A (en) * 1986-06-27 1987-10-13 Xerox Corporation Front air knife improvement for a top vacuum corrugation feeder
DE3710258A1 (de) * 1987-03-28 1988-10-13 Heidelberger Druckmasch Ag Vorrichtung zum transport von bogen, beispielsweise papierbogen
US4887805A (en) * 1988-03-10 1989-12-19 Xerox Corporation Top vacuum corrugation feeder
JPH01288538A (ja) * 1988-05-13 1989-11-20 Hitachi Koki Co Ltd 用紙搬送装置
JP2533957B2 (ja) * 1990-03-20 1996-09-11 シャープ株式会社 重送防止機能付きシ―ト給送装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0110649A2 (de) * 1982-11-24 1984-06-13 Tektronix, Inc. Blattfördervorrichtung für ein Kopiergerät
GB2164926A (en) * 1984-09-27 1986-04-03 Xerox Corp Air-assisted top sheet feeder
EP0273898A2 (de) * 1986-12-30 1988-07-06 Guy Martin Vorrichtung zum Entstapeln von Bögen

Also Published As

Publication number Publication date
ES2049845T3 (es) 1994-05-01
DE68915457D1 (de) 1994-06-23
DE68915457T2 (de) 1994-10-13
US5328165A (en) 1994-07-12
ATE105668T1 (de) 1994-05-15
EP0470951A1 (de) 1992-02-19
WO1990011240A1 (fr) 1990-10-04
EP0387476A1 (de) 1990-09-19

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