EP0755888A2 - Méthode et dispositif pour freiner les feuilles dans le dispositif de sortie d'une machine rotative d'impression pour feuilles - Google Patents

Méthode et dispositif pour freiner les feuilles dans le dispositif de sortie d'une machine rotative d'impression pour feuilles Download PDF

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Publication number
EP0755888A2
EP0755888A2 EP96112088A EP96112088A EP0755888A2 EP 0755888 A2 EP0755888 A2 EP 0755888A2 EP 96112088 A EP96112088 A EP 96112088A EP 96112088 A EP96112088 A EP 96112088A EP 0755888 A2 EP0755888 A2 EP 0755888A2
Authority
EP
European Patent Office
Prior art keywords
sheet
air flow
brake
sheets
guide
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
EP96112088A
Other languages
German (de)
English (en)
Other versions
EP0755888A3 (fr
EP0755888B1 (fr
Inventor
Günter Stephan
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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
Priority claimed from DE19626369A external-priority patent/DE19626369C2/de
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0755888A2 publication Critical patent/EP0755888A2/fr
Publication of EP0755888A3 publication Critical patent/EP0755888A3/fr
Application granted granted Critical
Publication of EP0755888B1 publication Critical patent/EP0755888B1/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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/686—Pneumatic brakes
    • 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 a device for braking the sheet in the delivery of a sheet-fed rotary printing press according to the preamble of patent claim 1.
  • suction belts or suction rolls which rotate at a slower speed than the machine speed and suck the sheet.
  • From DE-AS 21 35 105 it is also known to blow the incoming, initially still at its front edge by sheet grippers of a transport system over the entire width with blowing air, which is opposite to the sheet travel and which comes from directly in front of the sheet stack below the blowing nozzle strip arranged in the path of movement of the arc emerges.
  • This air flow which opposes the movement of the bow, creates a vacuum on the rear side of the blower strip, which in turn causes frictional forces between the bow and the blower air bar, so that braking forces act on the bow, which has meanwhile been released by the bow grippers of the transport system.
  • the incoming sheets are decelerated from machine speed to zero one after the other, so that the sheets are then deposited one after the other on the sheet stack in the delivery.
  • the time available for braking the successive sheets is extremely short due to the mandatory braking in succession, so that maximum possible braking forces are required which act on the sheets and put a correspondingly heavy load on them. This increases the susceptibility to faults and limits the possible machine speed. Attempts to improve so far have concerned the optimized design of the brake device means or the attachment of grippers.
  • blowing devices arranged in the area of the sheet brake are intended to support the trailing edge of the metal sheet against the braking device by means of negative pressure.
  • the invention is based on the object of increasing the time window available for braking the sheet in the machine cycle, that is to gain more time for braking each sheet independently of the machine speed.
  • This arc scaling extends the time available for braking the individual arc. At the same machine speed, lower braking forces are required to act on the sheet, or vice versa, this sheet scaling allows a higher machine speed with the same braking force effects on the sheets.
  • the method for braking the sheets in the delivery can be carried out with brake devices that act mechanically on the sheets, for example brake bands, suction rollers or the like, in connection with a mechanical sheet transport system (gripper chains) for the sheets to the delivery, or preferably by means of a sheet transport in a floating guide rectified air flow to slow down the arc.
  • brake devices that act mechanically on the sheets, for example brake bands, suction rollers or the like, in connection with a mechanical sheet transport system (gripper chains) for the sheets to the delivery, or preferably by means of a sheet transport in a floating guide rectified air flow to slow down the arc.
  • the levitation guide, sheet brake and the sheet stack are arranged essentially on one level, so that when thin, flexible paper is processed, it is possible to form a stack without wrinkling (creasing).
  • a mechanical conveyor system was selected for the sheet transport from the last printing unit to the delivery of a sheet-fed rotary printing press, in which gripper bridges 1 are attached to the circumferential conveyor chains at intervals, which extend across the sheet width and have sheet grippers 2 at a lateral distance from one another capture the sheet 3 to be transported at its front edge and pull it over a floating guide 4, in which blown air is passed under the sheet being transported, which through openings 5 in the transport direction of the Sheet emerges and is thus directed towards the delivery pile.
  • a sheet brake 6 is arranged directly in front of the sheet stack 10 at the end of this levitation guide 4.
  • the upper side 7 of the sheet brake 6 lies on a level which is approximately the same, but preferably on the level of the printing material thickness d, lower than the path 3 of the sheet 3 carried by the carrier air flow T during its transport.
  • This makes it possible to pull the front area of a sheet 3 following at machine speed over the rear area of the preceding sheet 3a, which is still on the sheet brake 6, which holds the sheet 3a in its rear area and at a speed opposite to the transport speed of the sheet Arc 3 is operated at reduced speed.
  • the time window available for sheet braking is increased considerably because the time for sheet braking can be extended in the area of the overlap formed by the scaling.
  • the sheet brake 6 can be designed as a mechanical sheet brake and can consist, for example, of suction belts rotating around one another, a suction roller or the like, which, however, rotates at a lower speed than the speed of the sheet transport to the delivery.
  • the sheet brake 6 detects the sheet 3a in its rear region and at the same time forms an extension of the floating guide 4 for the subsequent sheet 3, as can be clearly seen in FIG.
  • the sheet brake 6 is arranged at a distance a - seen in the sheet transport direction - behind the floating guide 4, so that an exhaust air duct 9 is formed between these devices, which derives the air flow T generated by the floating guide 4 as soon as the end of the respective leading sheet 3a Opening cross-section of the exhaust duct 9 releases.
  • the carrier air flow T is divided into two arms (T T , T A ). In this case, the air flow T T remaining between the bends 3 and 3a causes the separation of the successive bends 3, 3a, the other air flow T A being conducted into the exhaust air duct 9.
  • a sheet 3 fed to the delivery by means of a gripper closure is fed to the sheet brake 6 on a carrier air stream T.
  • the - seen in the sheet transport direction - arranged behind the levitation guide 4 sheet brake 6 is arranged essentially at the same level as the levitation guide 4, in a preferred embodiment, the height difference between the levitation guide 4 and sheet brake 6 is the substrate thickness d.
  • the distance a between the levitation guide 4 and the sheet brake 6 determines the outlet cross section of the exhaust air duct 9.
  • the sheet stack 10 is essentially arranged with its storage surface (top sheet) on a level with the floating guide 4 and the sheet brake 6, preferably by the printing material thickness d lower than the sheet brake 6.
  • a carrier air flow T is flushed out of the floating guide with at least one speed component in the direction of movement of the bow 3, 3a in the direction of the bow brake 6.
  • This speed component has an amount of approximately 50% to 150% of the conveying speed of the sheet 3, 3a.
  • the sheet 3 is held with its front edge in the gripper system 1, 2 and fed to the sheet brake 6. In doing so, it hovers on a carrier air flow T at a distance H above the levitation guide 4. At this point in time, the leading sheet 3a is located on the sheet brake 6 and is already being transported onto the sheet stack 10 at a reduced speed. This leading arc 3a forms the extension of the guiding plane formed by the floating guide 4. Thus the Sheet 3 has already been drawn over sheet brake 6 without touching leading sheet 3a or without coming into contact with sheet brake 6.
  • the leading sheet 3a releases the air outlet opening of the exhaust air duct 9.
  • the carrier air T is divided into a partial flow T A , which is discharged via the exhaust duct 9 and a partial flow T T , which ensures the separation between the two bends 3, 3 a.
  • the exhaust air duct 9 is completely released from the leading sheet 3a, so that the exhaust air flow T A becomes larger and the separation air flow T T becomes smaller.
  • one end of the sheet 3 reaches the sheet brake 6 released by the leading sheet 3a.
  • the gripper 2 opens and also releases the front edge of the sheet 3.
  • the sheet is now located with the rear edge on the sheet brake 6, while the front area floats on the air cushion T T which has been washed in previously. This cushion gradually escapes between the sheet 3a located on the sheet stack 10, so that contact only takes place when no more translatory movement is carried out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Discharge By Other Means (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP96112088A 1995-07-27 1996-07-26 Méthode et dispositif pour freiner les feuilles dans le dispositif de sortie d'une machine rotative d'impression pour feuilles Expired - Lifetime EP0755888B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19527440 1995-07-27
DE19527440 1995-07-27
DE19626369A DE19626369C2 (de) 1995-07-27 1996-07-02 Verfahren und Vorrichtung zum Bogenabbremsen im Ausleger einer Bogenrotationsdruckmaschine
DE19626369 1996-07-02

Publications (3)

Publication Number Publication Date
EP0755888A2 true EP0755888A2 (fr) 1997-01-29
EP0755888A3 EP0755888A3 (fr) 1997-08-27
EP0755888B1 EP0755888B1 (fr) 1999-12-29

Family

ID=26017187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112088A Expired - Lifetime EP0755888B1 (fr) 1995-07-27 1996-07-26 Méthode et dispositif pour freiner les feuilles dans le dispositif de sortie d'une machine rotative d'impression pour feuilles

Country Status (5)

Country Link
US (1) US5740740A (fr)
EP (1) EP0755888B1 (fr)
JP (1) JP3625582B2 (fr)
CN (1) CN1090564C (fr)
AT (1) ATE188188T1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6209456B1 (en) * 1996-03-13 2001-04-03 Heidelberger Druckmaschinen Ag Web- and sheet-fed printing unit using various ink types, particularly water-based inks
US6305772B1 (en) 1997-06-25 2001-10-23 Unisys Corporation Angled air impingment system for document control
CN1084253C (zh) * 1999-01-19 2002-05-08 李青安 无叼纸自动快速续纸系统
US20030131943A1 (en) * 2002-01-17 2003-07-17 Frederisy Douglas R. Apparatus and method for assembling absorbent garments
CN101037038B (zh) * 2006-03-15 2011-03-16 海德堡印刷机械股份公司 印张输送装置
DE102013010943B4 (de) * 2012-07-26 2024-03-14 Heidelberger Druckmaschinen Ag Bogenleitvorrichtung
CN103419483A (zh) * 2013-08-30 2013-12-04 新乡市瑞博印刷包装机械有限公司 胶印机空气托纸收纸装置
JP6723722B2 (ja) * 2014-12-02 2020-07-15 キヤノン株式会社 シート搬送装置、及び画像形成装置
CN111605764B (zh) * 2020-06-04 2021-10-29 青岛欣欣向荣智能设备有限公司 气流穿带打包机及其打包方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148241B (de) * 1958-12-15 1963-05-09 Linotype Machinery Ltd Bogenableger fuer Druckmaschinen
DE2544566A1 (de) * 1975-10-04 1977-04-14 Miller Printing Machinery Co Bogenausleger fuer bogendruckmaschinen
DE3938863A1 (de) * 1989-11-24 1991-05-29 Roland Man Druckmasch Vorrichtung zum fuehren frisch bedruckter bogen, vorzugsweise in der auslage von druckmaschinen
DE4344040C1 (de) * 1993-12-23 1995-03-23 Kba Planeta Ag Pneumatische Bogenleiteinrichtung
DE4343713A1 (de) * 1993-12-21 1995-06-22 Heinen Elektronik Gmbh Ablage für von einer Transportanlage zwangsgeführte, in Reihe ankommende Bögen
GB2293369A (en) * 1994-09-21 1996-03-27 Heidelberger Druckmasch Ag Process and device for guiding a sheet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975012A (en) * 1974-11-04 1976-08-17 Maxson Automatic Machinery Company Overlapped sheet-feeding machine
DE4140253A1 (de) * 1991-12-06 1993-06-09 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De Bogenleitvorrichtung im auslegebereich einer bogendruckmaschine
DE4308276C2 (de) * 1993-03-16 1997-09-04 Heidelberger Druckmasch Ag Leiteinrichtung für einen Bogen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148241B (de) * 1958-12-15 1963-05-09 Linotype Machinery Ltd Bogenableger fuer Druckmaschinen
DE2544566A1 (de) * 1975-10-04 1977-04-14 Miller Printing Machinery Co Bogenausleger fuer bogendruckmaschinen
DE3938863A1 (de) * 1989-11-24 1991-05-29 Roland Man Druckmasch Vorrichtung zum fuehren frisch bedruckter bogen, vorzugsweise in der auslage von druckmaschinen
DE4343713A1 (de) * 1993-12-21 1995-06-22 Heinen Elektronik Gmbh Ablage für von einer Transportanlage zwangsgeführte, in Reihe ankommende Bögen
DE4344040C1 (de) * 1993-12-23 1995-03-23 Kba Planeta Ag Pneumatische Bogenleiteinrichtung
GB2293369A (en) * 1994-09-21 1996-03-27 Heidelberger Druckmasch Ag Process and device for guiding a sheet

Also Published As

Publication number Publication date
US5740740A (en) 1998-04-21
EP0755888A3 (fr) 1997-08-27
ATE188188T1 (de) 2000-01-15
JP3625582B2 (ja) 2005-03-02
JPH09104556A (ja) 1997-04-22
CN1148008A (zh) 1997-04-23
EP0755888B1 (fr) 1999-12-29
CN1090564C (zh) 2002-09-11

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