EP0911158A2 - Vorrichtung zum steuerbaren und lösbaren Halten eines drehbar gelagerten Druckyzlinders - Google Patents

Vorrichtung zum steuerbaren und lösbaren Halten eines drehbar gelagerten Druckyzlinders Download PDF

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Publication number
EP0911158A2
EP0911158A2 EP98119939A EP98119939A EP0911158A2 EP 0911158 A2 EP0911158 A2 EP 0911158A2 EP 98119939 A EP98119939 A EP 98119939A EP 98119939 A EP98119939 A EP 98119939A EP 0911158 A2 EP0911158 A2 EP 0911158A2
Authority
EP
European Patent Office
Prior art keywords
flange
retaining device
working cylinder
cylinder
hold
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.)
Withdrawn
Application number
EP98119939A
Other languages
English (en)
French (fr)
Other versions
EP0911158A3 (de
Inventor
Flavio Buffo
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.)
Rotomec SpA
Original Assignee
Valmet Rotomec SpA
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 Valmet Rotomec SpA filed Critical Valmet Rotomec SpA
Publication of EP0911158A2 publication Critical patent/EP0911158A2/de
Publication of EP0911158A3 publication Critical patent/EP0911158A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/20—Supports for bearings or supports for forme, offset, or impression cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/80—Means enabling or facilitating exchange of cylinders
    • B41P2213/804—Means enabling or facilitating exchange of cylinders radially

Definitions

  • the present invention relates to an apparatus for controllably and removably retaining a work cylinder and in particular a cylinder in a printing unit of flexographic or off-set printing machines.
  • the cylinder changing operation is conventionally carried out manually, i.e. one or more operators move a hoist near to the printing unit whose cylinder is to be replaced, manually release the cylinder to be replaced from its supports, e.g. two arched caps are manually unlocked and raised open (one on each hold of the cylinder and having one end thereof hinged to a fixed support and the other end thereof that can be locked to the same support but on the opposite side with respect to the hold to be secured), before lifting and moving the cylinder away from its printing unit.
  • a similar operation is to be carried out, although in reverse sequence, for mounting a printing cylinder in its working position.
  • the main object of the present invention is to solve this problem by providing both a new working cylinder and a new retaining device for removably holding it free to rotate in its working position.
  • Another object of the present invention is to provide a removable retaining device that can be generally used on any type of printing machine, while ensuring high accuracy, reliability and short operating time.
  • a working cylinder more particularly a printing cylinder, having two holds which axially extend from both sides of the cylinder and is characterized in that it comprises a peripherally flanged member mounted for rotation on each end tail.
  • the said peripherally flanged member comprises a flange, an undercut annular seat formed in the flange as well as a sleeve which is integral with the said flange and is mounted for rotation on its respective hold with interposition of rolling means for reducing friction.
  • a retaining device for a working cylinder as specified above, which device comprises a receiving cradle for each end tail of said working cylinder at the said peripherally flanged member, removable engaging means arranged in each cradle designed to engage and lock in position the flange of its respective hold, and control and drive means for the said engaging means.
  • a printing cylinder 1 has two axial holds 2 and 3 which extend in opposite directions from the cylinder and are each provided with a peripherally flanged member 4 mounted for rotation on its respective hold. More particularly, each peripherally flanged member 4 comprises a sleeve 5 (Figs. 3 and 4) having an outer flange constituted by a radial web 6 and an end longitudinal section 7, which has an outer cylindrical surface and an inner flared surface 8 acting a an inclined plane, which delimits an undercut annular seat 9 together with the outer surface of the sleeve 5.
  • the sleeve 5 is mounted on the hold 3 through a pair of roller bearings 10 and 11 which are arranged between a pair of oil seals 12 and 13 that are held in position by two end seger rings 14 and 15.
  • the roller bearings 10 and 11 are in turn mounted either on the hold 3 or preferably on a bush 16 inserted onto the hold 3 against an abutting shoulder.
  • a machine e.g. a flexographic printing machine, generally indicated at 18 has fixed side shoulders 19 which support respective slide guides 20 on which one or more slides 21 are slidably mounted, each slide being designed to support one or a sequence of cradles generally indicated at 22 arranged to receive one hold 2 or 3 of a printing cylinder 1 at the flange 4 thereof.
  • Each cradle comprises, e.g. a base 25, a pair of spaced apart sides 26 and 27 supported by the base 25 and delimiting at the top thereof a substantially semicylindrical receiving seat 28 for supporting and receiving a sleeve 16 having an intermediate semicylindrical coaxial recess 29 for loosely receiving a flange 4.
  • a substantially semicylindrical receiving seat 28 for supporting and receiving a sleeve 16 having an intermediate semicylindrical coaxial recess 29 for loosely receiving a flange 4.
  • the two sides 26 and 27 delimit a space in which removably engaging means designed to engage and lock in position the flange 4 of a hold 2 or 3 is located.
  • such engaging means comprises a pair of linear actuators, generally indicated at 30 and 31 (only one of which 31 is illustrated in detail in cross-section), that are arranged to control a locking-unlocking member or rim 32 for a flange 4.
  • each actuator comprises a cylindrical space 33 which is closed at its ends by two sealing elements 34 and 35, the seal being provided by gaskets 36.
  • the cylindrical space has an intermediate through opening 37 at its upper part through which a portion (segment) of the flange 4 can pass and in which two sliding pistons are located on opposite sides with respect to the through opening 37, i.e.
  • the pistons 38 and 39 are provided with peripheral seals 42 and 43, respectively and can be moved together between an opening or unlocking position, in which the piston 38 rests against the sealing element 34, while the piston 39 is in a position far away from the sealing element 35 and the locking-unlocking member 32 leaves the opening 37 free, and a closing or locking position (Figs. 4 and 6), in which the pistons 38 and 39 has been moved to the opposite side and the locking-unlocking member 32 is urged into engagement with the wing portion 7 of the flange.
  • the locking-unlocking member 32 has an inclined-plane surface 44 which has the same inclination as the wing portion 7 of the flange 4 and thus an inclined-plane locking action is produced between element 32 and the flange.
  • Actuation of the pistons 38 and 39 is provided by a five-way electrovalve 45 which is in communication with a pressurised fluid source.
  • the electrovalve 45 supplies pressurised fluid via two ducts 46 and 47 sequentially into the gap between piston 38 and adjacent sealing element 34 by feeding it along the duct 46 and draining it from the gap between the piston 39 and sealing element 35 via the duct 47, and then by draining it via the duct 46 and feeding it via the duct 47.
  • the cylinder 1 When such device is in its rest or unlocking position, as illustrated in Figs 3 and 5, the cylinder 1 can be loaded onto, or removed from the cradles 28, e.g. by lifting or lowering it by means of a hoist or a robot. Should the cylinder be loaded or mounted, once the same has been laid on the cradles 28 at both its holds 2 and 3, a control signal is forwarded to the valves 45 which will cause the retaining device to switch from its rest position to its engaging position as illustrated in Figs. 4 and 6, i.e.
  • pressurised fluid will be fed to the duct 46 which would result in the locking members 32 engaging with the wings 7 of the flange 4, whereby the latter will be firmly locked in position while holding the cylinder 1 rightly seated with no clearance in its respective receiving cradles 28, while being free to rotate at low friction owing to the presence of the bearings 10 and 11.
  • the flange 4 can comprise only its radial portion 6 and the engaging means can comprise an hydraulic caliper group arranged to lock and unlock the flange 4, e.g. likewise the shoes of a disc brake.
  • the cradles 28 are delimited at their ends by a respective inserted block 48, which can be secured, e.g. by bolts, to a respective shoulder 26 or 27 and formed with an intermediate V-shaped groove which is a continuation of its respective groove 29 and constituted a guiding element for easier and quick seating of the flanges 4 in the receiving seats.
  • the used materials and dimensions can vary according to requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Support Of The Bearing (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP98119939A 1997-10-21 1998-10-21 Vorrichtung zum steuerbaren und lösbaren Halten eines drehbar gelagerten Druckyzlinders Withdrawn EP0911158A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97VR000097A IT1297495B1 (it) 1997-10-21 1997-10-21 Dispositivo per la ritenuta amovibile controllata di un cilindro di stampa girevole su supporti.
ITVR970097 1997-10-21

Publications (2)

Publication Number Publication Date
EP0911158A2 true EP0911158A2 (de) 1999-04-28
EP0911158A3 EP0911158A3 (de) 1999-11-03

Family

ID=11428441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119939A Withdrawn EP0911158A3 (de) 1997-10-21 1998-10-21 Vorrichtung zum steuerbaren und lösbaren Halten eines drehbar gelagerten Druckyzlinders

Country Status (3)

Country Link
EP (1) EP0911158A3 (de)
BR (1) BR9805274A (de)
IT (1) IT1297495B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1092536A1 (de) * 1999-10-11 2001-04-18 Gi Due S.r.l. Druckeinheit mit einem Druckzylinder mit vereinfachten Entfernung und Verriegelung
WO2009095234A1 (de) * 2008-02-01 2009-08-06 Manroland Ag Druckwerk für eine rotationsdruckmaschine
ITMI20101471A1 (it) * 2010-08-03 2012-02-04 Nuova Gidue Srl A Socio Unico Gruppo di stampa perfezionato, particolarmente per stampe flessografiche con cilindro di stampa rimovibile.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11693423B2 (en) * 2018-12-19 2023-07-04 Waymo Llc Model for excluding vehicle from sensor field of view

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD142951A1 (de) * 1979-05-14 1980-07-23 Peter Kahlert Lager fuer zylinder von druckmaschinen
DE3730308A1 (de) * 1987-09-10 1989-03-23 Roland Man Druckmasch Lager fuer zylinder von druckmaschinen
IT1226463B (it) * 1988-07-27 1991-01-16 Sted Eng Srl Aggancio rapido per la sostituzione di rulli
DE3837625C1 (de) * 1988-11-05 1989-11-02 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
IT1240494B (it) * 1990-07-20 1993-12-17 Officine Meccaniche G. Cerutti S.P.A. Macchina da stampa rotativa.
JP2597629Y2 (ja) * 1991-10-11 1999-07-12 株式会社小森コーポレーション 印刷機のローラ保持装置
US5241905A (en) * 1992-10-27 1993-09-07 Heidelberg Harris Inc. Printing unit with releasable bearing clamp
DE4414084C2 (de) * 1994-04-22 1997-09-18 Roland Man Druckmasch Rotationsdruckmaschine mit mehreren zusammenarbeitenden Zylindern
DE19511710C1 (de) * 1995-03-30 1996-04-11 Roland Man Druckmasch Einseitig offene Lagerung für rotationssymmetrische Bauteile, vorzugsweise für Walzenzapfen in Druckmaschinen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1092536A1 (de) * 1999-10-11 2001-04-18 Gi Due S.r.l. Druckeinheit mit einem Druckzylinder mit vereinfachten Entfernung und Verriegelung
US6408756B1 (en) 1999-10-11 2002-06-25 Gi Due S.R.L. Printing unit with printing cylinder having simplified removal and locking
WO2009095234A1 (de) * 2008-02-01 2009-08-06 Manroland Ag Druckwerk für eine rotationsdruckmaschine
ITMI20101471A1 (it) * 2010-08-03 2012-02-04 Nuova Gidue Srl A Socio Unico Gruppo di stampa perfezionato, particolarmente per stampe flessografiche con cilindro di stampa rimovibile.
WO2012016758A1 (en) * 2010-08-03 2012-02-09 Nuova Gidue S.R.L. A printing assembly, particularly for flexographic prints with removable printing roller

Also Published As

Publication number Publication date
ITVR970097A1 (it) 1999-04-21
IT1297495B1 (it) 1999-12-17
BR9805274A (pt) 2000-03-08
EP0911158A3 (de) 1999-11-03
ITVR970097A0 (it) 1997-10-21

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