EP0134526B1 - Verfahren und Vorrichtung zum passgenauen Bogentransport in eine Druckmaschine - Google Patents

Verfahren und Vorrichtung zum passgenauen Bogentransport in eine Druckmaschine Download PDF

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Publication number
EP0134526B1
EP0134526B1 EP84108795A EP84108795A EP0134526B1 EP 0134526 B1 EP0134526 B1 EP 0134526B1 EP 84108795 A EP84108795 A EP 84108795A EP 84108795 A EP84108795 A EP 84108795A EP 0134526 B1 EP0134526 B1 EP 0134526B1
Authority
EP
European Patent Office
Prior art keywords
suction
sheet
sheets
air
feed table
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
Application number
EP84108795A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0134526A2 (de
EP0134526A3 (en
Inventor
Helmut Emrich
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6208058&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0134526(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT84108795T priority Critical patent/ATE37523T1/de
Publication of EP0134526A2 publication Critical patent/EP0134526A2/de
Publication of EP0134526A3 publication Critical patent/EP0134526A3/de
Application granted granted Critical
Publication of EP0134526B1 publication Critical patent/EP0134526B1/de
Expired 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
    • B65H11/00—Feed tables
    • B65H11/002—Feed tables incorporating transport belts
    • B65H11/005—Suction belts
    • 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
    • B65H5/24—Feeding articles in overlapping streams, i.e. by separation of articles from a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/08—Holding devices, e.g. finger, needle, suction, for retaining articles in registered position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/321—Suction belts integral in feed table
    • 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
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a method and an apparatus for continuously conveying a stream of flaked sheets from a feeder to a printing press or other sheet-processing machine, in which the sheets are held in a defined position on a conveyor with the aid of suction air.
  • DE-PS 713 529 describes a sheet conveying device, in particular on sheet feeders for letterpress and similar machines.
  • endless belts with suction openings run over suction slots in the conveyor table.
  • suction slots By sucking air out of the suction slots, sheets of paper are held on the perforated belts and transported forward.
  • the disadvantage is the small volume of the suction slots and the arrangement of a piston pump. This means that this device cannot be safely transported.
  • relatively high negative pressures are necessary to achieve a transport effect at all, which in turn leads to increased friction of the belts on the conveyor table.
  • a sheet application device is described in DE-PS 836 355. It has additional suction means at the end of the conveyor table working with conveyor belts. These suction means are designed as suction rollers and act from the top on the end of the sheet to be conveyed to the front marks.
  • suction means are designed as suction rollers and act from the top on the end of the sheet to be conveyed to the front marks.
  • a disadvantage of this device is that the rollers must be controlled both in terms of their movement and in terms of their suction air supply. It cannot be ensured that the sheet is not conveyed too far and that it is supported by the front marks and bulges up in the middle. Then the next following sheet could be grasped by the suction rolls and conveyed further in an uncontrolled manner. In addition, the entire device must be adjusted precisely to the end of the sheet and blocks access to the sheets lying on the feed table.
  • This sheet deceleration and alignment device has suction chambers in the form of suction rolls or suction boxes wrapped with perforated conveyor belts, arranged on the left and right of the conveyor table and suitable for slowing and aligning the sheet against the front marks.
  • the speed of the conveyor belts is below the speed of the conveyor belts of the conveyor table.
  • the transport devices are also arranged here after the conveyor table in front of the feed table of the printing press. They therefore have a large distance from the front marks and their effect is therefore subject to the risk that the sheet will be supported on the front mark and be bulged by the conveying effect of the alignment means.
  • the disadvantage of the device described above, that there are again alignment means above the feed table, is avoided here, but the disadvantage of the control effort is also present here.
  • the working speed of this application device is slowed down by the reduced transport speed of the additional alignment means.
  • the object is achieved by the features described in the characterizing part of claim 1.
  • the additional drive belt used in front of the front brands in a special embodiment has the effect that the sheet cannot bounce back from the front brands and is also conveyed against the front brands in an inclined position. This results from the effect that the sheet swings around the drive belt like a hinge when it is in one-sided contact with the front marks and in this way aligns itself completely against the front marks.
  • the drive belt has at least the same speed as the perforated belts of the conveyor table, and the suction air on this drive belt acts continuously, the same drive force is always applied to the sheets arriving at the front marks, which can align them sufficiently quickly and also to rest there brings.
  • the side orientation is not hindered by the low holding effect on the drive belt, as is proposed in an embodiment of the invention.
  • the suction air source should be switched off.
  • the last sheet can no longer be held on the perforated belts of the conveyor table. This is also desirable insofar as the scaling due to another arch is missing for him, which would cause the perforated tapes to be covered. In this way, the last sheet of the stack or a print job or the last sheet before deliberate printing interruption can still be neatly printed without causing any difficulties on the contact sheet.
  • the advantages of the conveyor table, which transports sheets with the aid of suction air, are well known in that there is no risk of accidents and operating difficulties caused by. a holding frame for rollers and brushes to ensure sheet transport can be created on a conventional feed table with conveyor belts.
  • the arrangement of the additional drive belt near the front brands avoids the risk of bow compression between the front brands and the drive belt. Due to the small effective area of the drive belt, an exact front and side alignment of the sheets is guaranteed in connection with the side mark, since at the time of influencing they are free at their rear edge.
  • the additional facilities on the conveyor table do not work if a stopper stops the feeder. It is irrelevant if the drive belt continues to run when the front labels are locked, since it will still function in the same way as in normal machine operation. And it is rather favorable that the fan for the conveyor table remains in operation so that the sheets are held in their original scaled-down position on the conveyor table. However, the system is freely accessible: so that double sheets or sheets with wavy or damaged leading edge can be removed.
  • the arrangement according to the invention is particularly simple in that no special control is necessary for the operation of the drive belt. Both the air extraction and the drive of the drive belt can run completely continuously while the machine is operating.
  • the low air requirement means that no additional source of suction air is necessary.
  • the control for switching off the suction air on the conveyor table is not subject to great accuracy requirements, it can also be coupled with the switching off of the stack stroke when the feeder stack has run empty or with the switching off of the feeder. It is only sufficient to switch off the fan when the last sheet arrives on the table and at the same time to close the throttle valve. Due to the sufficient volume capacity of the suction box for negative pressure, the last sheets are still securely held on the conveyor table.
  • the conveyor table 1 for transporting the shingled sheet stream is located between the printing press 2 and the feeder 3.
  • the sheets are separated in the feeder 3 from a stack to a shingled stream of sheets and are in the system of the printing press 2 hand over their printing unit.
  • the sheets run there individually over a contact plate 4.
  • the conveyor table 1 consists of a suction box 5 and a fan 6.
  • Around the suction box 5 several endless perforated belts 7 are arranged.
  • the perforated tapes 7 are driven by shafts 8 and tensioned over tensioning rollers 9.
  • Two rows of suction openings 10 are arranged in the perforated belts 7 and connect the surface of the conveyor table 1 to the suction box 5.
  • the top of the suction box 5 is otherwise covered next to the perforated strips 7 with laterally displaceable covers 11 made of pattern-rolled sheet metal, so that only air can be sucked in through the perforated strips 7.
  • the sheet friction is particularly low on the pattern-rolled sheet.
  • a suction pipe 12 At the bottom of the suction box 5, there is a suction pipe 12 in which a throttle valve 13 is arranged.
  • the air flow through the suction box 5 can be controlled by the laterally displaceable cover plates in relation to the sheet format to be processed, in that the covers 11 can be pushed under the outer rows of the suction openings 10 in the perforated bands 7 and can be changed by changing the exhaust air opening on the fan 6 Size can be adjusted.
  • an additional conveyor is arranged in the middle between the perforated belts 7. It consists of a drive belt 16 provided with suction openings 20, which runs endlessly around a suction element 17.
  • the drive belt 16 is constantly driven and also tensioned via shafts 18.
  • a suction air connection 19 is provided on the suction element 17, from which air is sucked through the suction openings 20 in the drive belt 16.
  • the drive belt 16 runs at a speed which is at least as great as the speed of the perforated belts 7.
  • the suction air for the suction element 17 is not controlled in time, but is applied continuously.
  • the same holding forces always act on the suction openings 20 in the drive belt 16.
  • These holding forces should be set so that the sheet is not held but is only driven slightly forward. In this way, the drive belt 16 will always slip under the sheet abutting the front marks 15. Due to the proximity to the front marks 15, however, the sheet cannot bulge and thus cause investment difficulties. This also ensures that the sheet can be pulled from the side mark 14 against the side stop 21 for side alignment without difficulty.
  • the additional conveying device does not have to be adjusted in any way during operation, but it always remains constant both in its effectiveness and in its position during a print job.
  • the suction effect on the suction element 17 should, however, be adjustable as a function of the paper weight and the negative pressure must be stronger than on the suction box 5, since there is a larger effective area there.
  • the suction air connection 19 on the suction element 17 is simply connected to the suction air source of the printing press 2, which, as can be seen later, also proves to be advantageous and the suction air source mentioned is used very little by a very low air consumption.
  • Fig. 3a the sheet 22 is just against the front marks 15 and is held there by the drive belt 16. During this, the sheets 23 and 24 are shingled behind the sheet 22 on the conveyor table and the sheet 25 is pushed from the feeder 3 under the sheet 24.
  • the first sheet 22 is being drawn off into the printing press 2, the sheet 23 runs from the conveying table 1 onto the contact plate 4, while the sheets 24 and 25 are transported further on the conveying table 1.
  • the sheets 23, 24, 25 are only held on their front, not shingled part by the suction air effect of the conveyor table 1.
  • the penultimate sheet 24 has just run to the front marks 15 and is held there by the drive belt 16 with the help of the suction of the suction element 17.
  • the drive belt 16 slips continuously under the sheet 24 and transmits a force directed against the front marks 15 to the sheet 24 by friction.
  • the sheet 25 has been transported to the end of the conveyor table 1.
  • the scaling under the arch 24 means that the suction table 1 can no longer exert suction on the arch 24. So that the sheet 24 is released for the side drawing.
  • Fig. 3d it is shown what the conditions look like for the last incoming sheet.
  • the sheet 25 can be the last sheet of a print job or the last sheet of a paper stack from the feeder 3. If you let the sheet 25 enter the system without precautionary measures, it is now held by the conveyor table 1 now that it is no longer shingled on its rear side, since at this point the suction box 5 would still be supplied with negative pressure. In this case, it could no longer be guaranteed that the side mark 14 would also pull the sheet 25 properly. It is therefore provided that the suction air flow is interrupted before the sheet in question arrives when the last sheet 25 to be printed runs onto the conveying table 1. The throttle valve 13 is therefore closed when the sheet 25 has arrived on the conveyor table 1, as shown in Figure 3b.
  • FIG. 4 shows the entry of an inclined sheet 26 against the front marks 27, 28. For simplification only two front marks 27, 28 are shown here.
  • the sheet 26 runs against the front mark 27 due to its inclined position.
  • the driving force from the perforated belts 7 is interrupted by the following sheet, not shown, and the drive belt 16 takes over the further conveyance of the sheet 26 with the suction element 17. Because the drive belt 16 is arranged in the middle of the contact plate 4, the sheet 26 rotate around the drive belt 16 or around the active surface of the suction openings 20 in the drive belt 16, supported on the front mark 27, and are conveyed up to the front mark 28. This is possible primarily because there is deliberate slippage between the sheet 26 and the drive belt 16, i. H.
  • the drive belt 16 slips under the arch 26 or the arch 26 can move relative to the drive belt 16. Only when the sheet 26 also abuts the second front mark 28 is an exact side alignment guaranteed. However, since the drive belt 16 acts continuously on the sheet 26, this orientation towards the second front mark 28 will also occur during the side pulling process. Due to the high machine speeds, however, the drive belt 16 must run at least at the sheet travel speed of the conveyor table 1 in order to generate the alignment process sufficiently quickly. Due to the action of the side mark 14 and the drive belt 16, the sheet 26 is moved diagonally in the bearing direction 29 against the side stop 21 and the front marks 27, 28. This ensures that the sheet 26 is properly aligned for printing in the printing press 2. This position is shown in dashed lines in Fig. 4.
  • the feeder 3 can be uncoupled from the printing press 2.
  • the negative pressure in the suction box 5 of the conveyor table 1 remains and holds the sheets on the conveyor table 1 in their original position. If the cause of the print interruption lies in the printing press 2, printing can be continued immediately after rectification, since the sheet lying on the front marks 15 also retains its position without special measures having to be taken.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP84108795A 1983-09-02 1984-07-25 Verfahren und Vorrichtung zum passgenauen Bogentransport in eine Druckmaschine Expired EP0134526B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108795T ATE37523T1 (de) 1983-09-02 1984-07-25 Verfahren und vorrichtung zum passgenauen bogentransport in eine druckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3331662 1983-09-02
DE19833331662 DE3331662A1 (de) 1983-09-02 1983-09-02 Verfahren und vorrichtung zum passgenauen bogentransport in eine druckmaschine

Publications (3)

Publication Number Publication Date
EP0134526A2 EP0134526A2 (de) 1985-03-20
EP0134526A3 EP0134526A3 (en) 1986-12-03
EP0134526B1 true EP0134526B1 (de) 1988-09-28

Family

ID=6208058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108795A Expired EP0134526B1 (de) 1983-09-02 1984-07-25 Verfahren und Vorrichtung zum passgenauen Bogentransport in eine Druckmaschine

Country Status (6)

Country Link
US (1) US4651984A (da)
EP (1) EP0134526B1 (da)
JP (1) JPS6071438A (da)
AT (1) ATE37523T1 (da)
BR (1) BR8404373A (da)
DE (1) DE3331662A1 (da)

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DE3838078A1 (de) * 1988-11-10 1989-06-01 Mabeg Maschinenbau Gmbh Nachf Vorrichtung zum foerdern eines insbesondere geschuppten stroms von bogen
DE10017251A1 (de) * 2000-04-06 2001-10-11 Ltg Mailaender Gmbh Vorrichtung zur Bogenanlage
DE102014201774A1 (de) 2013-01-31 2014-07-31 Koenig & Bauer Aktiengesellschaft Anlegtisch
DE102006061429B4 (de) 2006-12-23 2023-07-20 Koenig & Bauer Ag Verfahren zum Zuführen eines geschuppten Bogenstromes

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838078A1 (de) * 1988-11-10 1989-06-01 Mabeg Maschinenbau Gmbh Nachf Vorrichtung zum foerdern eines insbesondere geschuppten stroms von bogen
DE3838078C3 (de) * 1988-11-10 1998-08-13 Roland Man Druckmasch Vorrichtung zum Fördern eines Stroms von Bogen
DE10017251A1 (de) * 2000-04-06 2001-10-11 Ltg Mailaender Gmbh Vorrichtung zur Bogenanlage
DE102006061429B4 (de) 2006-12-23 2023-07-20 Koenig & Bauer Ag Verfahren zum Zuführen eines geschuppten Bogenstromes
DE102014201774A1 (de) 2013-01-31 2014-07-31 Koenig & Bauer Aktiengesellschaft Anlegtisch

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ATE37523T1 (de) 1988-10-15
JPS6071438A (ja) 1985-04-23
DE3331662A1 (de) 1985-03-28
EP0134526A2 (de) 1985-03-20
DE3331662C2 (da) 1990-03-08
BR8404373A (pt) 1985-07-30
JPH0155172B2 (da) 1989-11-22
EP0134526A3 (en) 1986-12-03
US4651984A (en) 1987-03-24

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