EP0567753B1 - Halteeinrichtung für eine zu verschiebende Platte - Google Patents

Halteeinrichtung für eine zu verschiebende Platte Download PDF

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Publication number
EP0567753B1
EP0567753B1 EP93104229A EP93104229A EP0567753B1 EP 0567753 B1 EP0567753 B1 EP 0567753B1 EP 93104229 A EP93104229 A EP 93104229A EP 93104229 A EP93104229 A EP 93104229A EP 0567753 B1 EP0567753 B1 EP 0567753B1
Authority
EP
European Patent Office
Prior art keywords
plate
printing
holding device
suction
self
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
EP93104229A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0567753A1 (de
Inventor
Christian Dr. Compera
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 EP0567753A1 publication Critical patent/EP0567753A1/de
Application granted granted Critical
Publication of EP0567753B1 publication Critical patent/EP0567753B1/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
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder

Definitions

  • the invention relates to a holding device for a plate to be moved old a suction cup, which has a sealing, elastic suction lip, which closes a volume when pressing the plate.
  • Suction cups are well known, for example as holders on tiles of a wall. Such suction cups can also be firmly anchored to hold a plate. However, if such a plate is to be moved and at the same time held by the suction cup, it is necessary to guide the suction cup in a guide with the plate. To release the connection between the suction cup and the plate, it is necessary to apply a force which is greater than the holding force of the suction cup, or one must provide ventilation, for example by means of a valve, which aerates the volume of the suction cup.
  • a suction cup is described in GB 10 06 042. On the one hand, it is used for gripping and on the other hand for moving paper sheets from stacks.
  • the suction cup consists of a cylindrical part, on the underside of which a truncated cone-shaped suction head is attached.
  • the inside of the suction head has circular projections.
  • the suction head ends old on an outer edge.
  • EP-A 0 095 218 shows a suction cup for holding objects, which provides ventilation by means of a valve to release a holding force.
  • EP 0 431 575 A2 already discloses suction cups for holding printing plates in one Insert pressure plate feeder.
  • the suction cups provided are slidably guided in a guide together with the pressure plate.
  • the invention has for its object to make available a holding device of the type mentioned that a plate to be moved in the desired position without using an increased force or Venting channel with controlled valve automatically releases.
  • the suction lip consists of a material with good sliding properties and that the plate has a bore, the bore and suction cup being arranged such that the bore in a plate position in which the holding device is released is supposed to happen, the suction lip by moving the plate.
  • the holding device is simple and extremely inexpensive to manufacture. Handling is simple and convenient with a high level of functional reliability.
  • a particularly advantageous application is the holding of printing plates which are to be fed to a plate cylinder of a printing press.
  • the printer puts the printing plate with its front edge into a clamping device and presses the printing plate with its non-printing side against the suction cup of the holding device.
  • the machine pulls in the pressure plate, sliding past the holding device until a hole in the pressure plate passes the suction lip.
  • Such bores are present anyway at the end of a printing plate, since they are used for the plate copy or for punching U-shaped recesses for positioning the printing plates.
  • the holding device releases and the pressure plate can be drawn further into the machine.
  • This independent release is required for printing plates which are angled at their rear edge for the purpose of clamping and clamping on the plate cylinder. Venting through the hole ensures that the pressure plate is released in time so that it can be drawn into the machine. After the pressure plate is released from the holding element, it falls down a bit due to its weight, so that the angled rear edge can slide past the holding element.
  • a suction cup or a row of suction cups can be arranged. Whereby several suction cups can also be arranged in the drawing-in direction of the pressure plate, which release the pressure plate one after the other. This is particularly useful for large printing plates in order to guide and hold them securely.
  • the pressure plate After approval by the last or the only holding element, the pressure plate is caught by a pressure element, which at the same time serves to insert the rear edge of the pressure plate into the corresponding device of the plate cylinder.
  • the pressure element is arranged in such a way that it is located with a small lateral offset at the lower end of the straight line, which in the plate changing position between the clamping surfaces of the device for receiving the pressure plate leading edge leads to the suction cup or the suction cups.
  • a printing unit protection which is present anyway and which has to be folded up to change the printing plate.
  • a printing unit protection consists of two parts connected by a joint, the lower part being guided in a guide which has a stop at its upper end. The upper part of the printing unit protection is connected to a lever which is mounted on the printing unit. After folding up the printing unit protection, the lower part of the printing unit protection lies in the guide against a stop and the upper part of the printing unit protection is connected to a gas pressure spring, which ensures that the printing unit protection assumes a fixed position when folded up. If the printing unit protection is folded down, the angular relationships change and as a result the printing unit protection keeps the gas pressure spring in its compressed state. This is achieved in that the printing unit, the gas pressure spring and part of the lever form a triangle, which has different angular relationships due to the folding down of the printing unit protection and as a result the forces acting on the gas pressure spring are also changed.
  • the holding force for the pressure plate must be dimensioned accordingly.
  • the required holding force depends on the nature of the Pressure plate.
  • the size of the holding force can be adjusted by means of the diameter of the suction lip of the suction cup and by dimensioning the pressure conditions. In this case, the holding force is increased by increasing the underpressure achieved and by increasing the diameter of the suction lip of the suction cup.
  • the size of the vacuum depends on the size of the volume and the amount of air escaping when the suction head is pressed.
  • the holding force must be at least so great that it is sufficient to hold the plate, but at most it must be so great that the suction lip can still slide on the plate.
  • volume can be variably adjusted in accordance with the desired holding force. In this way it is possible to adapt a holding device to different pressure plates, which require a different holding force due to their weight and their surface condition.
  • the holding device can be designed such that the volume is molded into a solid body and that the elastic suction lip is attached to the solid body.
  • the variable volume can be achieved in that the solid body is designed as a piston-cylinder unit, the volume being adjustable by the position of the piston.
  • the piston must be designed so that its setting can be locked, or so that the setting is no longer adjusted. This can be done, for example, in that a threaded spindle passes through the solid body to the outside and can be rotated from the outside. This also enables readjustment during operation.
  • the size of the holding force is also influenced by the amount of air when the plates are pressed onto the suction cup escapes. Therefore, a further development provides that a precisely defined holding force is achieved within a narrow tolerance range in that a defined distance is provided between the edge of the suction lip in the non-suctioned state and the solid body, and that the suction lip is deformable in this way when the plate is pressed on that the solid body strikes the plate. By dimensioning the distance, the negative pressure achieved in the volume, which arises when the plate is pressed on, can be specified in accordance with the desired holding force.
  • rubber with a hardness of 40-45 Shore can be provided for the suction lip.
  • Figure 1 shows a suction cup 1, which is attached to a fixed machine part and to which a plate 2 has been pressed for holding.
  • the suction lip 3 is elastic and seals the volume 4 of the suction cup 1.
  • air has escaped from the volume 4, creating a negative pressure for holding the plate 2.
  • the plate 2 is moved in the direction of arrow 6.
  • a bore 5 is provided in the plate.
  • the suction cup 1 and the bore 5 are arranged such that the bore 5 passes through the displacement 6 of the plate 2 in a plate position in which the holding device is to release.
  • the volume 4 is thereby vented and the suction cup 1 detaches from the plate 2.
  • the holding force is determined by the diameter D of the suction lip 3 and by the negative pressure in the volume 4.
  • the negative pressure and the size of the volume 4 also depend on how strongly the plate 2 is pressed onto the suction cup 1.
  • a small volume 4 which is greatly increased by a force that pulls the plate 2 vertically away from the suction cup 1, brings the greatest negative pressure and thus the greatest holding force.
  • FIG. 2 shows an embodiment in which the volume 4 is molded into a solid body 7.
  • the suction cup consists of a funnel-shaped part which is attached to the solid body 7.
  • the holding device has been pressed against the plate 2 so far that the solid body 7 strikes the plate 2.
  • the distance a (FIG. 3) between the edge of the suction lip 3 in the non-suctioned state and the solid body 7 being overcome.
  • This reproducible setting is important because, if the holding force is too great, the sliding resistance of the suction cup on the plate becomes too great, but on the other hand a holding force must be guaranteed which holds the plate securely.
  • FIG. 2 shows, as plate 2, a pressure plate which has an angle at its end over which the Holding device can not slide away. It is therefore necessary that the suction cup 1 releases the pressure plate before it reaches its end region. This is ensured by the bore 5 of the printing plate, which is present anyway for creating the plate copy or for punching further recesses in printing plates.
  • the area of application is not limited to printing plates, other plates can also be held in this way up to a predetermined position.
  • Figure 3 shows a development with a volume 4, which is formed in the solid body 7 as a piston-cylinder unit.
  • the volume 4 is adjusted by the position of the piston 9.
  • the setting can be made, for example, by means of a threaded spindle. It has the advantage that the desired holding force can be varied. With a corresponding configuration, the setting can also be carried out during operation.
  • the adjustable volume 4 allows plates of different weights and different surface properties to be held in such a way that they are guided safely and the suction lip 3 nevertheless glides easily on the plate 2.
  • FIG 4 shows an application of the holding device.
  • the suction cups 1 are arranged on a lower part 22 of the printing unit protection 15, this part of the printing unit protection being oriented such that the suction cup 1 or the suction cups 1 assume a position in which they lie on a straight line which is parallel to the clamping surfaces 18 of the Device 13 for clamping the front edge of the printing plate 2 'runs, passes between these clamping surfaces and thereby leads out of the printing unit 11 obliquely upwards.
  • a certain position of the plate cylinder 10 is necessary for this, in which the clamping surfaces 18 the device 12 for tightening the front edge of the pressure plate 2 'of this straight line are aligned accordingly.
  • the lower part 22 of the printing unit protection 15 is guided in a guide 16 which has a stop 17.
  • the printing unit protection 15 is held by a lever 20 which is connected to the printing unit 11 by a bearing 21.
  • the lever 20 is in turn with an upper part of the printing unit protection 23 in fixed, angled connections.
  • a gas pressure spring 19 is arranged between the lever 20 and the printing unit 11.
  • FIG. 4 two suction cups 1 are shown on the lower part of the printing unit protection 22, the upper suction cup being vented when the bore 5 of the pressure plate 2 reaches it. The upper suction cup 1 releases the plate 2. The unwound rear edge of the pressure plate 2 'slides past the suction cup 1, which has released it, because its weight causes it to drop a little and thereby moves a small distance away from the suction cup 1.
  • the pressure plate 2 ' is wound further around the plate cylinder 10 and the bore 5 reaches the second, lower suction cup 1, whereby this is also vented and releases the pressure plate 2 '.
  • the pressure plate 2 ' falls down, being caught and guided by a pressure element 25.
  • the printing plate is completely wound around the plate cylinder 10 and inserted, clamped and tensioned in the device 13 for tightening the rear edge of the printing plate 2 'by means of the pressing element 25.
  • the printing plate trailing edge is inserted by a radial movement of the pressing element 25 in the direction of the plate cylinder 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Screen Printers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
EP93104229A 1992-04-29 1993-03-16 Halteeinrichtung für eine zu verschiebende Platte Expired - Lifetime EP0567753B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4214047A DE4214047A1 (de) 1992-04-29 1992-04-29 Halteeinrichtung fuer eine zu verschiebende platte
DE4214047 1992-04-29

Publications (2)

Publication Number Publication Date
EP0567753A1 EP0567753A1 (de) 1993-11-03
EP0567753B1 true EP0567753B1 (de) 1996-07-10

Family

ID=6457717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104229A Expired - Lifetime EP0567753B1 (de) 1992-04-29 1993-03-16 Halteeinrichtung für eine zu verschiebende Platte

Country Status (7)

Country Link
US (1) US5361699A (enrdf_load_stackoverflow)
EP (1) EP0567753B1 (enrdf_load_stackoverflow)
JP (1) JPH0623956A (enrdf_load_stackoverflow)
CN (1) CN1029672C (enrdf_load_stackoverflow)
AU (1) AU656666B2 (enrdf_load_stackoverflow)
CA (1) CA2091795A1 (enrdf_load_stackoverflow)
DE (2) DE4214047A1 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214049A1 (de) * 1992-04-29 1993-11-04 Heidelberger Druckmasch Ag Vorrichtung zum zufuehren einer druckplatte zu einem plattenzylinder einer druckmaschine
DE4402158C1 (de) * 1994-01-26 1995-02-02 Heidelberger Druckmasch Ag Schutzvorrichtung an Druckmaschinen
FR2718675B1 (fr) * 1994-04-18 1996-07-12 Heidelberg Harris Sa Dispositif d'échange de clichés de machines rotatives à imprimer.
DE4414443C1 (de) * 1994-04-26 1995-11-30 Heidelberger Druckmasch Ag Vorrichtung zum Führen eines Druckträgers
DE9415751U1 (de) * 1994-09-29 1994-11-17 Man Roland Druckmaschinen Ag, 63069 Offenbach Vorrichtung zum Zuführen einer Druckplatte zum Plattenzylinder einer Druckmaschine
DE19507908C2 (de) * 1995-03-07 1999-12-09 Heidelberger Druckmasch Ag Vorrichtung zum Abziehen und Halten einer Druckplatte, die von einem Plattenzylinder einer Rotationsdruckmaschine abgeführt wurde
GB2304632B (en) * 1995-08-29 1998-09-23 Heidelberger Druckmasch Ag Guard for a unit of a printing machine
US6113346A (en) 1996-07-31 2000-09-05 Agfa Corporation Method for loading and unloading a supply of plates in an automated plate handler
DE19744457C1 (de) 1997-10-08 1999-06-24 Siemens Ag Fernantrieb mit Motor für Leistungsschalter
DE19834783A1 (de) * 1998-08-01 2000-02-03 Koenig & Bauer Ag Verfahren und Einrichtung zur Gewährleistung der Arbeitssicherheit
DE10010056B4 (de) 1999-03-31 2012-11-08 Heidelberger Druckmaschinen Ag Druckplattenwechsler
DE102004023434A1 (de) * 2004-05-10 2005-12-08 Maschinenfabrik Wifag Rotationsdruckmaschine mit Saugvorrichtung, Saugvorrichtung und Verfahren zum Wechseln einer Druckform
DE102008010598A1 (de) * 2008-02-22 2009-08-27 Manroland Ag Handhabungsvorrichtung einer Druckmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1006042A (en) * 1964-06-22 1965-09-29 Harris Intertype Corp Sheet gripping sucker

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2404412A (en) * 1943-10-07 1946-07-23 Robert M Stephens Vacuum cup
US2659560A (en) * 1951-09-13 1953-11-17 George A Lehmann Suction mounting for can openers or the like
AU733266A (en) * 1967-06-22 1968-01-18 ALISTAIR KENDALL IRVINE and WILLIAM ALEXANDER IRVINE Improvements relating to suction cups
US3649069A (en) * 1970-06-03 1972-03-14 Andrew H Zip Glare shield for automobiles
AU7438081A (en) * 1981-08-20 1983-02-24 Hunter Douglas Ltd. Suction device
DE3367195D1 (en) * 1982-05-26 1986-12-04 Agfa Gevaert Nv A sheet dispenser
DE8215605U1 (de) * 1982-05-28 1982-09-09 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Sicherungsvorrichtung an rotationsdruckmaschinen
JPS5922755A (ja) * 1982-07-30 1984-02-06 Komori Printing Mach Co Ltd 枚葉輪転印刷機の刷版保持装置
JPS6073850A (ja) * 1983-09-26 1985-04-26 Tokyo Kikai Seisakusho:Kk 輪転機における刷版自動着脱装置
US4624456A (en) * 1985-09-26 1986-11-25 Crathern Engineering Co., Inc. Apparatus for actuating a suction workholder
JP2643178B2 (ja) * 1987-09-18 1997-08-20 ソニー株式会社 映像信号記録装置
JPH07115462B2 (ja) * 1988-01-06 1995-12-13 三菱重工業株式会社 刷版の版胴への着脱ロボット用ハンド
US4883282A (en) * 1988-03-07 1989-11-28 Wolf Isobel T Apparatus for supporting the handicapped or elderly
ATE130801T1 (de) * 1989-08-04 1995-12-15 Komori Printing Mach Druckplattebefestigung für eine bogendruckmaschine.
DE69022822T2 (de) * 1989-12-06 1996-05-23 Komori Printing Mach Platteneinbringungseinrichtung für Druckpressen.
JP2867155B2 (ja) * 1989-12-06 1999-03-08 株式会社 小森コーポレーション 版胴への刷版供給装置
DE3940449A1 (de) * 1989-12-07 1991-06-13 Roland Man Druckmasch Handhabungsvorrichtung
JP2844539B2 (ja) * 1989-12-15 1999-01-06 株式会社小森コーポレーション 印刷機の刷版保持装置
JP2722022B2 (ja) * 1991-03-14 1998-03-04 株式会社小森コーポレーション 版胴への刷版装着装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1006042A (en) * 1964-06-22 1965-09-29 Harris Intertype Corp Sheet gripping sucker

Also Published As

Publication number Publication date
JPH0623956A (ja) 1994-02-01
DE59303174D1 (de) 1996-08-14
EP0567753A1 (de) 1993-11-03
US5361699A (en) 1994-11-08
CN1029672C (zh) 1995-09-06
AU3821493A (en) 1993-11-11
CN1077920A (zh) 1993-11-03
AU656666B2 (en) 1995-02-09
CA2091795A1 (en) 1993-10-30
DE4214047A1 (de) 1993-11-04
DE4214047C2 (enrdf_load_stackoverflow) 1994-04-07

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