EP0849081B1 - Vorrichtung zur Detektion von Fehlbogen in einer Wendeeinrichtung einer Druckmaschine - Google Patents

Vorrichtung zur Detektion von Fehlbogen in einer Wendeeinrichtung einer Druckmaschine Download PDF

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Publication number
EP0849081B1
EP0849081B1 EP97119850A EP97119850A EP0849081B1 EP 0849081 B1 EP0849081 B1 EP 0849081B1 EP 97119850 A EP97119850 A EP 97119850A EP 97119850 A EP97119850 A EP 97119850A EP 0849081 B1 EP0849081 B1 EP 0849081B1
Authority
EP
European Patent Office
Prior art keywords
connecting line
suckers
sheet
storage drum
sensing
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
EP97119850A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0849081A1 (de
Inventor
Willi Becker
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
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0849081A1 publication Critical patent/EP0849081A1/de
Application granted granted Critical
Publication of EP0849081B1 publication Critical patent/EP0849081B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other 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
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/34—Pressure, e.g. fluid pressure

Definitions

  • the invention relates to a device for detecting misfed sheets in a Turning device of a printing press, according to the preamble of claim 1.
  • Devices for the detection of missing sheets in turning devices of printing machines are known and are used to correct the errors that occur when turning a sheet Sheet position, or other disturbances in sheet travel, to recognize and the printing process Occurrence of a misbend, e.g. B. a short sheet to interrupt to damage the press or parts thereof.
  • Short arches arise for example by tolerances in the length of the processed sheets, which at uncut paper can be in the range of several millimeters and that cause the sheets in turning operation from the grippers gripping the trailing edge of the sheet cannot be properly grasped and lost.
  • a generic sheet query device in which on the storage drum of a turning device of a sheet-fed offset printing machine a first row of suction pads is provided in the area of the trailing edge of the sheet, which the Vacuum and hold the trailing edge of the sheet during the turn.
  • the suction pads are over a first Connection line connected to a first vacuum generator.
  • In the direction of rotation of the Storage drum seen in front of the suction pad row is another row with interrogation nozzles arranged via a second connecting line and one with the connecting line flow-connected pressure switch to a second vacuum generator connected.
  • the query nozzles can be due to the arrangement of a separate Vacuum generator work with a low constant pressure.
  • the openings of the Interrogation nozzles not or only partially covered by the trailing edge of the sheet, so that in the second connecting line, a pressure change occurs, which is recognized by the pressure switch and which leads to the immediate shutdown of the printing process or the printing press.
  • a disadvantage of the device described above is that two separate Vacuum sources with different pressures are required to make the device safe to be able to operate.
  • the object of the invention is to achieve a device for the detection of To create missing sheets in the turning device of a printing press, which consists of a comparatively small number of inexpensive to manufacture and mechanically robust and insensitive to contamination caused by the operation of the printing press Components is constructed and also has such a high sensitivity that the time span for detecting a missing sheet is short enough, as is the printing press at the highest production speeds in the event of a malfunction stop so that damage to the same is reliably avoided.
  • the invention has the particular advantage that the components used in it are mechanically robust and therefore have only a very low susceptibility to failure as well a reduced susceptibility to compulsory when operating the printing press occurring contamination, such as paper dust deposits, Color deposits, etc. have. It is also an advantage of the invention Device that only a vacuum source is required for its operation and that also in printing machines with a large number of suction pads to hold the Trailing edge of the sheet and a comparatively small number of interrogators in the case of short sheets, in which the interrogators do not or only from the trailing edge of the sheet partially covered, even when using comparatively insensitive Pressure monitoring devices respond very quickly to the device.
  • the device according to the invention has the advantage that the use of Suction cups for the detection of false sheets have an increased holding force for holding the Trailing edge of the sheet without additional energy expenditure for generating additional Vacuum is provided.
  • the device 1 shown in Fig. 1 for the detection of misfires on a Storage drum 2 of a turning device 4 of a printing press 6 comprises a first Number of 8 on the storage drum 2 in the area of the rear edge of a sheet arranged suction cups 10, which via a first common connecting line 12 to a Vacuum source 14 are connected.
  • a first common connecting line 12 to a Vacuum source 14 are connected.
  • Fig. 1 are in Seen sheet transport direction, which is indicated in Fig. 2 by the arrow A, before which preferably in a row extending over the storage drum 2 holding suckers 10 Querierauger 16, the second connecting line 18 of smaller diameter are connected in terms of flow to the first connecting line 12.
  • the second connecting line 18 of smaller diameter are connected in terms of flow to the first connecting line 12.
  • the Pressure monitoring device 20 from a piston 24 loaded by a spring 22, the by the negative pressure in the second connecting line 18 within a housing 25 in different positions is moved.
  • the printing press 6 is not shown in the drawings shown control devices of the pressure switch 20 switched off.
  • a valve 26 may be provided in the second connecting line 18, which preferably between the pressure monitoring device 20 and the first Connection line 12 is arranged.
  • the valve 26 is preferably a manual one actuatable valve, but can also be used as a pneumatic or electric or in otherwise operable valve be formed.
  • both the suction cups 10 and 12 are the query suction device 16 is designed as a known eccentric rotary suction device that engages the arc 8 suck in its rear edge and then in both the longitudinal and diagonal directions tighten.
  • the holding suction device 10 and the interrogation suction device 16 can, however, in the same way other known types of suckers are formed, however, the holding suction 10 as the query suction devices 16 essentially belong to the same type of suction devices.
  • the cross-sectional areas of the first connecting line 12 and the second Connecting line 18 is preferably chosen such that the ratio of Cross-sectional areas of the first and second connecting lines 12, 18 are substantially the same the ratio of the number of connected to the first connecting line 12 Holding suction device 10 for the number of connected to the second connecting line 18 Querierauger 16 is.
  • the number of suction cups 10 is preferably essential greater than the number of query suction devices 16, the number of holding suction devices 10 not increasing the total of eight suction cups 10 shown in FIG. 2 is limited, but in the same Way can have a smaller or larger value. The same applies accordingly to the Query suction device 16, the number of which is not limited to the two suction devices shown, but can also be larger.
  • the ratio of the cross-sectional areas of the first and second connecting line 12, 18 preferably has a value> 2. It can also it can be provided that the interrogator 16 next to or between the holding suction 10 are arranged.
  • the suction cups 10 and / or Interrogator 16 is preferably equidistant from each other along a substantially parallel to the axis of rotation 38 of the storage drum 2 axis extending on the circumferential surface of the Storage drum 2 arranged, as shown for example in Fig. 2.
  • the suction air is supplied from the Vacuum source 14 to the holding suction devices 10 or interrogation suction devices 16 preferably through a rotary valve or a rotary union 28, which one with the side wall 30 of the Printing machine stationary connected valve ring 32, in which a first Control groove 34 for the supply of suction air to the suction cups 10 and a second Control groove 36 for supplying suction air to the interrogation suckers 16 is located.
  • the first and second control grooves 34, 36 are preferably concentric and mutually arranged opposite to the axis of rotation 38 of the storage drum 2, the Control grooves 34, 36 seen in the radial direction, offset from one another without overlap are arranged.
  • the advantage over an arrangement of the control grooves 34, 36 in parallel to each other on the same side of the valve ring 32 is that even in the case a small raidalen distance between the control grooves 34, 36 an overflow of Missing air is avoided.
  • the rotary valve 28 also faces on the rotating side Storage drum 2 a control opening 40 corresponding to the first groove 34 and one second, with the second groove 36 corresponding second control opening 42 that the respective end of the section of the first extending in the rotating storage drum Form connecting line 12, or the second connecting line 18. With a rotation the storage drum 2, the holding suction 10 and the interrogation 16 are thus periodic via the first and second control openings 40, 42 and the associated first and second Control grooves 34, 36 connected to the vacuum source 14.
  • interrogation device in connection with a Turning device of a printing press was operated, this can also in principle other areas of a printing press, for example in the feeder area, in Boom area, on sheet guide and guide plates etc. for the detection of missing sheets be used.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Controlling Sheets Or Webs (AREA)
EP97119850A 1996-12-20 1997-11-13 Vorrichtung zur Detektion von Fehlbogen in einer Wendeeinrichtung einer Druckmaschine Expired - Lifetime EP0849081B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19653353 1996-12-20
DE19653353A DE19653353A1 (de) 1996-12-20 1996-12-20 Vorrichtung zur Detektion von Fehlbogen in einer Wendeeinrichtung einer Druckmaschine

Publications (2)

Publication Number Publication Date
EP0849081A1 EP0849081A1 (de) 1998-06-24
EP0849081B1 true EP0849081B1 (de) 2000-03-08

Family

ID=7815576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119850A Expired - Lifetime EP0849081B1 (de) 1996-12-20 1997-11-13 Vorrichtung zur Detektion von Fehlbogen in einer Wendeeinrichtung einer Druckmaschine

Country Status (4)

Country Link
US (1) US5996994A (ja)
EP (1) EP0849081B1 (ja)
JP (1) JP4105266B2 (ja)
DE (2) DE19653353A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1274637B1 (en) * 2000-04-18 2006-06-21 Hewlett-Packard Indigo B.V. Sheet transport position and jam monitor
DE10023434B4 (de) * 2000-05-12 2004-11-25 Koenig & Bauer Ag Saugersystem in Wendetrommeln von Druckmaschinen
DE10023431B4 (de) * 2000-05-12 2004-12-09 Koenig & Bauer Ag Sauger in Wendetrommeln
DE102015209693B4 (de) * 2014-06-18 2021-01-14 Koenig & Bauer Ag Wendevorrichtung, Verfahren zum Wenden eines Bogens und Verwendung eines Fixiersystems zum Querstraffen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2621250C2 (de) * 1976-05-13 1982-07-22 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenabfragevorrichtung in einer Rotationsdruckmaschine
DE4114320A1 (de) * 1991-05-02 1992-11-05 Planeta Druckmaschinenwerk Ag Pneumatische kontrolleinrichtung in druckmaschinen

Also Published As

Publication number Publication date
JP4105266B2 (ja) 2008-06-25
DE19653353A1 (de) 1998-06-25
JPH10193573A (ja) 1998-07-28
DE59701216D1 (de) 2000-04-13
EP0849081A1 (de) 1998-06-24
US5996994A (en) 1999-12-07

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