WO1994014615A1 - Dispositif de tension sur une presse rotative - Google Patents

Dispositif de tension sur une presse rotative Download PDF

Info

Publication number
WO1994014615A1
WO1994014615A1 PCT/DE1993/001191 DE9301191W WO9414615A1 WO 1994014615 A1 WO1994014615 A1 WO 1994014615A1 DE 9301191 W DE9301191 W DE 9301191W WO 9414615 A1 WO9414615 A1 WO 9414615A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping spindle
cylinder
spindle
clamping
tensioning
Prior art date
Application number
PCT/DE1993/001191
Other languages
German (de)
English (en)
Inventor
Georg Schneider
Wolfgang Otto Reder
Original Assignee
Koenig & Bauer Aktiengesellschaft
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 DE4326248A external-priority patent/DE4326248C2/de
Application filed by Koenig & Bauer Aktiengesellschaft filed Critical Koenig & Bauer Aktiengesellschaft
Priority to EP94901753A priority Critical patent/EP0675808B1/fr
Priority to JP51467194A priority patent/JP3323202B2/ja
Priority to DE59305910T priority patent/DE59305910D1/de
Publication of WO1994014615A1 publication Critical patent/WO1994014615A1/fr

Links

Classifications

    • 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
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/125—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end on a curvilinear path, e.g. by winding on a roll

Definitions

  • the invention relates to a device for fastening and tensioning a flexible arcuate object such.
  • a disadvantage of this device is that torsional forces act when the rubber blanket is tensioned, so that the tensioning shaft is twisted in its longitudinal direction, which leads to an uneven tensioning of the rubber blanket, particularly in the case of rotary printing machines with a large printing width.
  • the invention has for its object to provide a device for fastening and a uniform over the entire length of the clamping spindle of a blanket, printing blanket or printing plate on a cylinder of a printing press, with which an automatic and even tensioning of the printing blanket over the entire web width.
  • the invention achieves the following advantages in particular: As a result of a plurality of drive elements arranged on the circumference of the tensioning spindle and acting tangentially to the tensioning spindle, the tensioning spindle is rotated without torsion and thus a uniform tensioning of the printing blanket over the entire width of the cylinder.
  • the arrangement of compression springs in the toothed racks which can be moved transversely to the axis of rotation of the tensioning spindle, results in constant, even re-tensioning of the rubber blanket, printing blanket or a printing plate during operation.
  • a controllable drive e.g. B. a compressed air hose allows a tool-free tensioning of the blanket.
  • the clamping spindle it can be divided into clamping spindle pieces. so that the clamping spindle pieces each individually from a space between the bearer ring and the clamping device, for. B. can be removed for cleaning purposes without the cylinder has to be removed from the rotary printing press.
  • Fig. 1 is a perspective view of a Device according to the invention, partially broken out, in the tensioned position;
  • Fig. 2 shows a section II - II in Fig. 1;
  • FIG. 3 is an illustration of FIG. 2, but in
  • Fig. 4 shows a section IV - IV in Fig. 1 but with the
  • Fig. 5 is a view A of the locking device in Fig. 4;
  • Fig. 6 shows a section VI - VI in Fig. 4 in a reduced size
  • a cylinder pit 1 of a cylinder 2 which is only indicated, extends a device, generally designated 3, for holding a beginning of an object described below and tensioning an arcuate, flexible object 10 located on the jacket of the cylinder 2, for. B. a blanket, a blanket or a printing plate, hereinafter referred to as "blanket 10" - in the circumferential direction.
  • the cylinder pit 1 has a flat bottom surface 4 and two side surfaces 6, 7 delimiting the bottom surface 4.
  • the device 3 arranged in the cylinder pit 1 extends in the axis-parallel direction to the cylinder 2
  • the first side surface 6 extends an insert strip 8 with an axially parallel edge 9 running at an acute angle for receiving an angled first end
  • the insert bar 8 sits with its second end near the bottom surface 4 on a bottom plate 11.
  • a second insert strip 12 extends along the second side surface 7 with an acute-angled, axially parallel, rounded edge 13, over which a second end 49 of the printing blanket 10 is drawn and a tensioning spindle 14 to be described in more detail for tensioning the second printing blanket end
  • the printing blanket 10 has a binding strip 51 at each end 48, 49.
  • the border strip 51 of the first blanket end 48 engages behind a hooking edge 53 of a groove 54 which runs in the insert bar 8 parallel to an axis of rotation 52.
  • the insert bar 8 is made in one piece together with the insert bar 12 via webs (not shown) and has cavities for receiving tensioning spindle pieces 14.1 to 14.4 and racks 18 to 22.
  • the insert strip 12 is only indicated with its end faces in FIG. 1.
  • the tensioning spindle 14 has an essentially circular cross section with a slot 16 for receiving the second end 49 of the rubber blanket 10 to be tensioned.
  • the slot 16 diametrically on the circumference of the tensioning shaft 14 is opposite a toothing 17 with a width that the length g of the Correspond to the clamping spindle 14 or the clamping spindle pieces to be shown in more detail below.
  • the tip circle of the toothing 17 can correspond to the diameter of the clamping spindle 14.
  • the clamping spindle 14 is in different lengths, for. B. four equally long clamping spindle pieces 14.1, 14.2, 14.3, 14.4, of which the clamping spindle piece 14.4 has not been shown in FIG. 1. This also applies to a further rack on which the clamping spindle piece 14.4, not shown, is supported with its second end.
  • These clamping spindle pieces 14.1 to 14.4 engage with their side facing the base plate 11 and provided with the toothing 17 in the top of racks 18, 19, 21, 22.
  • the toothed racks 18 to 22 have an approximately square cross section, correspond in length 1 to 0.6 times to 0.8 times the width b of the cylinder pit 1 and are each with their bottom surface on the base plate 11 of the cylinder pit 1 against the force a spring 23, 24, 26, 27 movable in the circumferential direction of the cylinder 2.
  • the racks 18 to 22 can also consist of a round cross section.
  • the racks 18, 19, 21, 22 are each arranged under the at the front ends 29, 30, 31, 32, 33, 34 of the clamping spindle pieces 14.1, 14.2, 14.3, 14.4 of the clamping spindle 14, so that the first end 29 of the clamping spindle piece 14.1 engages in the rack 18, the second end 30 of the clamping spindle piece 14.1 and the first end 31 of the clamping spindle piece
  • the toothed racks 18, 19, 21, 22 each have a pin 36 on their upper side, which engages in a slot 37, which is delimited at all ends in the insert strip 8.
  • All slots 37 are arranged parallel to one another and parallel to the end faces of the cylinder 2.
  • the springs 27 can also be held in a blind hole 39 located in a respective first end face 38 of the rack 18, 19, 21, 22.
  • a second end face 41 of the toothed racks 18, 19, 21, 22 facing the second side face 7 of the cylinder pit 1 is non-positively and positively with a support plate 42, 43, 44, 45, z. B. connected by screws, not shown.
  • These support plates 42, 43, 44, 45 are slightly spaced apart from one another in the axial direction and have a height h running in the radial direction, which is greater than the elongated width e of an air hose 47, which is arranged in one piece in the axial direction between the support plates 42 to 45 and the second side surface 7 of the cylinder head 1.
  • the air hose 47 is closed at its first end and provided at its second end with a connector (not shown) for the inlet and outlet of compressed air.
  • the first air hose 47 is assigned a second air hose 57 in parallel, which can also be pressurized with compressed air via a connector (not shown).
  • the compressed air at a pressure of 4 to 6 bar can be obtained from a compressed air system via a hose and a valve, not shown.
  • the nozzle is located on the front side of the device 3 and is connected to the hose mentioned while the cylinder 2 is at a standstill.
  • the device 3 is fastened via through holes, not shown, in the base plate 11 in the cylinder pit 1.
  • screws, not shown are provided which cooperate with threaded holes, not shown, in the bottom surface 4 of the cylinder pit 1.
  • the base plate 11 is connected to the one-piece insert strips 8, 12 by means of retaining screws, not shown.
  • the insert strips 8, 12 are adapted to the circumference of the clamping spindle 14 on the side facing the clamping spindle 14, but in such a way that the second end 49 of the printing blanket 10 can still be received between the insert strip 8 and the slot 16 of the clamping spindle 14.
  • the clamping spindle 14 can also be made in one piece.
  • the method of operation is as follows: the first end 48 of the rubber blanket 10 is seen in an axially parallel groove 54, which extends in the radial direction and is hung behind the hanging edge 53 by means of the binding strip 51.
  • the printing blanket 10 is now placed around the edge 9 of the insert bar 8.
  • the second end 49 reaches the area of the edge 13 of the insert strip 12 and is inserted with its border strip 51 into the slot 16 (FIG. 3).
  • the air hoses 47, 57 are pressurized with compressed air.
  • the compressed air supply is interrupted, so that the compressed air from the air hoses 47, 57 and the springs 23, 24, 26, 27, the racks 18, 19, 21, 22 synchronously via the clamping spindle pieces 14.1, 14.2, 14.3, 14.4 bring it back into the clamping position (Fig. 2).
  • the printing blanket 10 is thus tense.
  • the clamping spindle pieces 14.1, 14.2, 14.3, 14.4 can be removed from a space which is located in the cylinder pit 1 between the end of the device 3 and a bearer ring (not shown).
  • a distance between the bearer ring and the end face of the device 3 in the cylinder pit 1 is greater than the length g of one of the clamping spindle pieces 14.1, 14.2, 14.3, 14.4, so that a quick removal of the Clamping spindle pieces 14.1 to 14.4 is guaranteed.
  • 14.1 to 14.4 is used to remove the individual clamping spindle pieces
  • a locking device designated overall by 56, is provided in the cylinder pit 1 parallel to the toothed racks 18, 19, 21, 22 and is synchronous with the above-mentioned.
  • Rack 18, 19, 21, 22 moved transversely to the axis of rotation 52 of the clamping spindle 14.
  • the locking device 56 consists of a rack 58 with a bore 59 for receiving a bolt 61, which is non-positively and positively at its first end with a support plate
  • the bolt 61 has a chamfer 64 at its second end. Furthermore, the opening 59 is followed by an opening for receiving a two-armed lever 66, which is mounted on the rack by means of a retaining bolt 67.
  • a first end 68 of the lever 66 is chamfered and is in the case of a blanket change with the chamfer 64 of the bolt 61 non-positive connection.
  • a second end 69 of the lever 66 is angled approximately 45 ° with respect to the first end 68 in the direction of the base plate 11 and engages with its front edge in a toothing 71 which is shown in FIG.
  • Fig. 4 can the blanket 10 in a direction of rotation of the cylinder 2 in the counterclockwise direction c as a result of
  • the printing blanket 10 can, however, continue to tension itself if the compression springs 23, 24, 26,
  • Hoses 47, 57 now the racks 18, 19, 21, 22 and 58 moved to the left in the direction of the insert bar 8.
  • a position of the clamping spindle 14 according to FIG. 3 is taken for changing the printing blanket 10.
  • an ejection element which consists of a pin 74 which is movably guided in the insert bar 8 parallel to the direction of movement of the racks 18, 19, 21, 22 and which has its first end 76 is non-positively and positively connected to a piston of a piston-cylinder unit 77, not designated.
  • the pin 74 presses in the event of actuation of the piston-cylinder unit 77, for. B.
  • the binding strip 51 presses against the force of a spring 79, which is designed in the form of a pre-tensioned leaf spring provided with a curvature and can be fastened to one end on a flat 81 of the tensioning spindle 14. Is located the flattened portion 81 near the slot 16 of the clamping spindle 14, specifically in the clamping direction, behind the slot 16 of the clamping spindle 14.
  • a plurality of ejection elements 73 and springs 79 can be arranged next to one another in the axial direction 52.
  • the spring 79 is also possible to arrange the spring 79 on a holder (not shown) fixed to the channel or to the base plate, so that the spring 79 also presses against one of the flanks of the bordering strip 51.
  • the end 48 of the printing blanket 10 fastened in the groove 54 of the cylinder pit 1 or the insert strip 8 can be removed effortlessly.
  • a blanket 10 to be re-mounted on the cylinder 2 is introduced with its border 51 into the groove 54 and pressed against the base of the groove by the force of the spring 79 and held on the hanging edge 53.
  • the displaceable pins 74 can also be driven by means of a camshaft arranged parallel to the axis of rotation 52 of the clamping spindle 14 in the insert bar 8.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Testing Of Balance (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

Avec un dispositif servant à fixer et à tendre un blanchet en caoutchouc ou en feutre ou une plaque offset sur un cylindre d'une presse rotative, on se propose de réaliser une tension régulière du blanchet sur toute la largeur de la bande du fait d'une rotation sans torsion de l'arbre de tension, arbre qui permet un réglage régulier de la tension même pendant le fonctionnement de la presse. Dans le cadre de l'invention, cet objectif est atteint par le fait que l'arbre de tension présente à sa périphérie une denture et que cette denture s'engrène sur des crémaillères mobiles disposées transversalement par rapport à l'axe de rotation de l'arbre de tension. Les crémaillères sont entraînées par un organe de réglage qui s'oppose à la force de tension de ressorts.
PCT/DE1993/001191 1992-12-24 1993-12-14 Dispositif de tension sur une presse rotative WO1994014615A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP94901753A EP0675808B1 (fr) 1992-12-24 1993-12-14 Dispositif de tension sur une presse rotative
JP51467194A JP3323202B2 (ja) 1992-12-24 1993-12-14 輪転印刷機の巻締め装置
DE59305910T DE59305910D1 (de) 1992-12-24 1993-12-14 Spannvorrichtung in einer rotationsdruckmaschine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4244074 1992-12-24
DEP4244074.2 1992-12-24
DEP4326248.1 1993-08-05
DE4326248A DE4326248C2 (de) 1992-12-24 1993-08-05 Spannvorrichtung in einer Rotationsdruckmaschine

Publications (1)

Publication Number Publication Date
WO1994014615A1 true WO1994014615A1 (fr) 1994-07-07

Family

ID=25921783

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/001191 WO1994014615A1 (fr) 1992-12-24 1993-12-14 Dispositif de tension sur une presse rotative

Country Status (4)

Country Link
EP (2) EP0675808B1 (fr)
JP (1) JP3323202B2 (fr)
DE (4) DE9319411U1 (fr)
WO (1) WO1994014615A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20010395U1 (de) * 2000-06-09 2001-10-11 Heidelberger Druckmasch Ag Zylinder mit einer Klemmeinrichtung in einer Druckmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB266520A (en) * 1926-02-01 1927-03-03 Fred Wesley Wright Improvements in and relating to tensioning devices for blankets and printing plates in printing machines
CH371139A (fr) * 1959-05-22 1963-08-15 Carl Allers Ets Cylindre d'impression
CH394254A (fr) * 1962-02-09 1965-06-30 Carl Allers Etab As Cylindre d'impression
DE2720673A1 (de) * 1977-05-07 1978-11-09 Maschf Augsburg Nuernberg Ag Vorrichtung zum spannen des gummituches auf einem zylinder einer offsetdruckmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2778307A (en) * 1953-04-14 1957-01-22 American Type Founders Co Inc Plate clamping means
DE4127714A1 (de) * 1991-08-22 1993-02-25 Koenig & Bauer Ag Einrichtung zum befestigen und spannen eines drucktuches auf einem zylinder einer druckmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB266520A (en) * 1926-02-01 1927-03-03 Fred Wesley Wright Improvements in and relating to tensioning devices for blankets and printing plates in printing machines
CH371139A (fr) * 1959-05-22 1963-08-15 Carl Allers Ets Cylindre d'impression
CH394254A (fr) * 1962-02-09 1965-06-30 Carl Allers Etab As Cylindre d'impression
DE2720673A1 (de) * 1977-05-07 1978-11-09 Maschf Augsburg Nuernberg Ag Vorrichtung zum spannen des gummituches auf einem zylinder einer offsetdruckmaschine

Also Published As

Publication number Publication date
DE9318667U1 (de) 1994-02-10
DE59309597D1 (de) 1999-06-24
JPH08504694A (ja) 1996-05-21
EP0737574B1 (fr) 1999-05-19
JP3323202B2 (ja) 2002-09-09
DE9319411U1 (de) 1994-02-10
EP0675808A1 (fr) 1995-10-11
EP0737574A3 (fr) 1997-05-28
EP0737574A2 (fr) 1996-10-16
DE59305910D1 (de) 1997-04-24
EP0675808B1 (fr) 1997-03-19

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