EP1048459B1 - Presse offset à bobines pour la production de formulaires commerciaux ou similaires - Google Patents

Presse offset à bobines pour la production de formulaires commerciaux ou similaires Download PDF

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Publication number
EP1048459B1
EP1048459B1 EP20000107360 EP00107360A EP1048459B1 EP 1048459 B1 EP1048459 B1 EP 1048459B1 EP 20000107360 EP20000107360 EP 20000107360 EP 00107360 A EP00107360 A EP 00107360A EP 1048459 B1 EP1048459 B1 EP 1048459B1
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EP
European Patent Office
Prior art keywords
cylinder
gear
impression cylinder
web
drive linkage
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
EP20000107360
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German (de)
English (en)
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EP1048459A1 (fr
Inventor
Tetsu Ohno
Masahiro Naka
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.)
Miyakoshi Printing Machinery Co Ltd
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Miyakoshi Printing Machinery Co Ltd
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Publication of EP1048459A1 publication Critical patent/EP1048459A1/fr
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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
    • B41F13/008—Mechanical features of drives, e.g. gears, clutches
    • 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
    • B41P2213/10—Constitutive elements of driving devices
    • B41P2213/20—Gearings
    • 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
    • B41P2213/10—Constitutive elements of driving devices
    • B41P2213/20—Gearings
    • B41P2213/208—Harmonic drive
    • 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
    • B41P2213/70—Driving devices associated with particular installations or situations
    • B41P2213/73—Driving devices for multicolour presses

Definitions

  • This invention relates generally to printing presses, and more particularly to an apparatus for production of business forms including a printing station having offset printing units in series, in each of which the inked image is printed from a plate cylinder to a blanket cylinder and thence offset or transferred to the web running against an impression cylinder. Still more particularly, the invention deals with a drive system for the cylinders of each such printing unit, including provisions for adjustably varying the speed at which the web is fed through the unit by the impression cylinder.
  • the machine for production of business forms has been known which takes the form of a streamlined series of a paper supply station, a printing station, a punching station, a perforating station, and so forth.
  • Successful operation of the business form machine depends on a large measure on proper speed control of the pertinent cylinders and rollers so that the paper web may travel through the successive stations under constantly correct tension. The web will meander if the tension is insufficient, and become elongated if the tension is too much.
  • the business forms produced will be unsatisfactory, or even defective, in the registration and alignment, in both top-to-bottom and lateral directions, of the printings and other operations.
  • the greater the web thickness t the higher is the web speed V.
  • the web speed V becomes progressively higher with the web thickness t as the roller or cylinder grows less in diameter d.
  • Some known business form machines come with a set of interchangeable printing cylinder assemblies each comprised of a plate cylinder, blanket cylinder, and impression cylinder in the case of offset lithography. These cylinder assemblies are selectively installed in the respective printing units of the machine according to the required top-to-bottom dimensions of the business forms to be produced.
  • a trouble with such cylinder assemblies is that they have tended to feed the web at different speeds because of some unavoidable fluctuations in the diameter of the impression cylinders around which the web is wrapped through a certain substantial angle in order to be thereby fed toward the next printing unit or toward the next processing station. Consequently, each time a different cylinder assembly is installed in any of the printing units, web tension has often changed between the impression cylinders of this cylinder assembly and the upstream or downstream one.
  • Web tension control has been made still more difficult in machines using moistening water, which causes web elongation. Just as the web elongates when wetted, so it contracts upon drying. Web tension has therefore had to be individually adjusted in each printing unit, made lower in printing units that do not require moistening water than in the units that do.
  • Japanese Patent Publication No. 4-51456 represents a solution to the foregoing difficulties, suggesting the provision of a speed changer in each offset printing unit for adjustably varying the speed of the impression cylinder independently of the plate cylinder and the blanket cylinder.
  • this known solution requires that all the cylinder assemblies for different business form sizes and different color printings be individually furnished with their own speed changers.
  • the present invention seeks, in an offset printing press for making business forms in particular, to make the speed of rotation of the impression cylinder variable independently of the plate cylinder and blanket cylinder and hence to make adjustable the speed at which the paper web is fed by the impression cylinder for proper web tension despite variations in paper thickness, impression cylinder diameter, and other printing conditions.
  • the invention also seeks to make it possible to set the plate cylinder and blanket cylinder out of rotation while the impression cylinder remains in rotation, in order to change the printing plate on the plate cylinder without stopping the web.
  • the invention also seeks to attain the foregoing objects in a printing machine having a series of printing units each designed for use with a set of interchangeable printing cylinder assemblies for production of different size business forms or the like.
  • the invention concerns a web-fed offset printing press suitable for production of business forms, among other applications, comprising a plurality of offset printing units in serves, in each of which an inked image is printed from a plate cylinder to a blanket cylinder and thence offset to a web running against an impression cylinder.
  • two drive linkages are provided in each of the printing units, one for driving the plate cylinder and the blanket cylinder, and the other for driving the impression cylinder.
  • a speed changer means is coupled to the second drive linkage in each of the printing units for adjustably varying the rotational speed of the impression cylinder.
  • the rotational speed of the impression cylinder is adjustably variable by the speed changer means with a minimum of errors and totally independently of the plate cylinder or the blanket cylinder.
  • the paper web to be printed upon may be fed under optimum tension in the face of likely variations in paper thickness, impression cylinder diameter, and other printing conditions.
  • the two drive linkages take the form of gear trains, both coupled to a common drive source such as a gearbox on a drive shaft common to all the serial printing units of the machine.
  • the speed changer means is inserted between two selected gears of the second drive linkage.
  • the impression cylinder that largely determines the traveling speed of the web. Since this impression cylinder is driven through a gear train different from that for driving the plate cylinder and blanket cylinder, the gear train for the impression cylinder can be much shorter than in the prior art case where the impression cylinder is driven through the plate cylinder and blanket cylinder. Driven through a smaller number of gears, therefore, the impression cylinder is subject to the correspondingly reduced resultant of the backlashes of the intermeshing gears. The rotational speed of the impression cylinder is therefore controllable more accurately than heretofore, affording the production of higher quality printings.
  • the cylinder assemblies having no speed changer means be put to use with conventional machines having no second drive linkage in addition to those having both first and second drive linkages according to the invention. Provisions are made in consideration of this possibility for making the impression cylinder of each cylinder assembly drivable not only from the second drive linkage but via the plate cylinder and blanket cylinder of that cylinder assembly as well.
  • the blanket cylinder of each assembly may be drivingly coupled to the impression cylinder preparatory to mounting the cylinder assembly to the machine. The speed of the impression cylinder will then be conventionally adjusted via the plate cylinder and the blanket cylinder.
  • a further consideration that must be made in applying the invention particularly to business form machines for use with interchangeable cylinder assemblies is that, upon installation of each cylinder assembly in the machine, its impression cylinder occupies a different position relative to stationary parts of the machine. The final gear of the second drive linkage is therefore movable into and out of driving engagement with the impression cylinder of each cylinder assembly.
  • first drive linkage is connected to a first drive source
  • second drive linkage connected to a second drive source which serves also as the speed changer means
  • an example of the second drive source being a servomotor.
  • a clutch is provided for connecting and disconnecting the first drive source to and from the first drive linkage and hence from the plate cylinder and the blanket cylinder.
  • blanket cylinder and the impression cylinder of each cylinder assembly are relatively movable into and out of contact with each other, as by being rotatably mounted to frame means via eccentric bearings.
  • the impression cylinder may be held in rotation in order to keep the web running whereas the blanket cylinder is held out of contact with the impression cylinder and, together with the plate cylinder, out of rotation.
  • the plate on the plate cylinder may be changed while the web continues traveling.
  • the above outlined construction of the alternate embodiment is currently believed to be of particular advantage when applied to those machines having a series of printing units two of which are to be put to alternate use for printing different images (e.g. shop names) on the continuously running web.
  • These two printing units may be each configured as in the foregoing.
  • the plate on the printing plate of the other printing unit may be changed with that bearing some other shop name.
  • said other printing unit may be set in operation for printing a second shop name on the web.
  • the first recited printing unit may be held out of operation for changing, as necessary, its printing plate with that bearing still another shop name.
  • the present invention is believed to be best applicable to multi-color business form making machines such as that diagrammed in Figure 1.
  • the representative business form machine takes the form of a streamlined series of a paper supply station 1, a printing station 2, a post-printing processing station 3, and a folding station 4.
  • the printing station 2 is subdivided into a series of offset printing units 5 for printing different color images on the paper web supplied from the supply station 1.
  • offset printing units 5 for printing different color images on the paper web supplied from the supply station 1.
  • All the printing units are alike in mechanical design, each conventionally comprising a plate cylinder 6, a blanket cylinder 7, and an impression cylinder 8 for printing by the familiar offset lithographic method.
  • the invention particularly pertains to the printing station 2, or to each of its constituent printing units 5, and more particularly to the drive system, not shown in Figure 1, for the cylinders 6, 7 and 8 of each offset printing unit.
  • the illustrated machine is further designed for production of business forms in several different sizes.
  • the printing cylinders 6, 7 and 8 come in the form of interchangeable cylinder assemblies 5', each complete with a pair of subframes, which are to be selectively mounted to, and dismounted from, the frames of each offset printing unit 5.
  • the number of the printing units disagrees in Figures 1 and 2 because of lack of space in Figure 1; moreover, the number does not matter.
  • FIG. 2 is also explanatory of the drive system for the printing station 2.
  • an infeed roll from which a paper web P is fed into the machine.
  • the infeed roll 10 is driven from a drive shaft 11 via a gearbox 12. Itself coupled to a drive source such as, typically, an electric motor, not shown, the drive shaft 11 extends past all the printing units 5 for driving them via additional gearboxes 13.
  • the plate cylinder 6 of each printing unit 5 is driven from one gearbox 13 via a first drive linkage 13a, and the impression cylinder 8 of each printing unit from the same gearbox via a second drive linkage 13b including speed changer means 20.
  • the blanket cylinder 7 is directly geared to the plate cylinder 6 thereby to be driven.
  • This gearbox may therefore be considered a source of rotary driving motion as far as the printing unit under consideration is concerned.
  • the two drive linkages 13a and 13b are both illustrated in detail and on an enlarged scale in Figures 3 and 4.
  • the gear box 13 has an output shaft 26a on which there is fixedly mounted a gear 26 in mesh with another gear 27.
  • Still another gear 28 is mounted on the same shaft as the gear 27 and constrained to joint rotation therewith.
  • Both drive linkages 13a and 13b are gear trains in constant mesh with the gear 28.
  • the first drive linkage 13a comprises a train of gears 33, 34, 35, 36, 37 and 38.
  • the gear 33 is in mesh with the gear 28.
  • the gear 38 is in mesh with a gear 14 on an extension of one of the trunnions 6a of the plate cylinder 6.
  • This plate cylinder gear 14 is in mesh with a gear 15 on an extension of one of the trunnions 7a of the blanket cylinder 7.
  • the plate cylinder gear 14 and blanket cylinder gear 15 are the same in diameter and number of gear teeth.
  • the position of the plate cylinder gear 14 relative to the final gear 38 of the gear train is unchanged from one cylinder assembly 5' to another.
  • the plate cylinder gear 14 should therefore come automatically into, and out of, driven engagement with the gear 38 when any of the interchangeable cylinder assemblies 5' of this printing unit 5 is mounted to, and dismounted from, the printing unit.
  • the second drive linkage 13b comprises a train of gears 29, 30, 22, 23, 24 and 25.
  • the gear 29 is in mesh with the gear 28.
  • the gear 25 is in mesh with a gear 17 on an extension of one of the trunnions 8a of the impression cylinder 8.
  • the impression cylinder gear 17 is the same in diameter and number of gear teeth with the plate cylinder gear 14 and blanket cylinder gear 15.
  • the final gear 25 of the second drive linkage 13b is, together with the immediately upstream gear 24, rotatably supported between a pair of swing arms 21 which are jointly pivotable about the same axis as the gear 23.
  • This gear 23 is in mesh with the gear 24 which is coaxial with the final gear 25 and rotatable jointly therewith.
  • a linear actuator such as a fluid actuated cylinder, preferably an air cylinder 19, is operatively coupled between one of the swing arms 21 and a stationary part of the machine for swinging the swing arms so as to move the gear 25 into and out of positive engagement with the impression cylinder gear 17. Seen at 17a and 25a are bearers fastened to the gears 17 and 25 for restricting them against relative axial displacement and maintaining them in mesh with each other.
  • a second impression cylinder gear 16 is mounted via bearings 16a on the same impression cylinder trunnion extension as the first recited impression cylinder gear 17.
  • the second impression cylinder gear 16 is therefore rotatable relative to the impression cylinder 8 whereas the first impression cylinder gear 17 is not, so that the second gear 16 will be hereinafter referred to as the rotatable impression cylinder gear, and the first gear 17 as the nonrotatable impression cylinder gear.
  • the rotatable impression cylinder gear 16 is in mesh with the blanket cylinder gear 15, although the rotation of this gear 15 is not normally transmitted to the impression cylinder 8.
  • Both impression cylinder gears 16 and 17 are the same in diameter and number of teeth.
  • a lockpin 18 is movable into and out of positive engagement in a depression 16b cut eccentrically in the rotatable impression cylinder gear 16.
  • the impression cylinder 8 is driven from the blanket cylinder gear 15 when the lockpin 18 is engaged in the depression 16b, and from the second drive linkage 13b when the lockpin is disengaged from the depression.
  • the rotatable impression cylinder gear 16 need not necessarily be locked to the nonrotatable impression cylinder gear 17 to transmit the rotation of the blanket cylinder gear 15 to the impression cylinder 8, all that is required to this end being that the rotatable impression cylinder gear be locked against rotation relative to the impression cylinder.
  • the speed changer means 20 include a harmonic speed changer 20a of conventional design trademarked "Harmonic Drive”, which is installed between the coaxial gears 20 and 23 of the second drive linkage 13b.
  • the Harmonic Drive speed changer 20a has what is known as a web generator gear 31 which is in mesh with a pinion 32a on the armature shaft of an electric speed control motor 32, an additional component of the speed changer means 20.
  • the speed of the gear 23, which is on the output side of the Harmonic Drive 20a, is variable by changing the speed of the "web generator gear” 31 through adjustment of the speed of the motor 32.
  • appropriate cylinder assemblies 5' may be chosen according to the size of business forms to be made and installed one in each printing unit 5.
  • the plate cylinder gear 14 of each cylinder assembly 5' will come into mesh with the final gear 38 of the first drive linkage 13a upon installation of that cylinder assembly in one printing unit 5.
  • the lockpin 18 on the nonrotatable impression cylinder gear 17 is now disengaged from the eccentric hole 16b in the rotatable impression cylinder gear 16, permitting its rotation relative to the impression cylinder 8. Consequently, although the rotation of the plate cylinder gear 14 is imparted to the blanket cylinder gear 15 and thence to the rotatable impression cylinder gear 16, there is no torque transmission from this gear 16 to the impression cylinder 8.
  • the position of the plate cylinder gear 14 relative to the first drive linkage 13a is unchanged as aforesaid from one cylinder assembly 5' to another, so that the plate cylinder gear 14 will automatically come into mesh with the final gear 38 of the first drive linkage.
  • the nonrotatable impression cylinder gears 17 of the various cylinder assemblies 5 are to occupy different positions according to the size of the business forms to be made.
  • the final gear 25 of the second drive linkage 13b is therefore mounted to the pair of swing arms 21 for angular displacement therewith. These swing arms are movable by the air cylinder 19 for bringing the final gear 25 into engagement with the nonrotatable impression cylinder gear 17 regardless of its variable position. Power flow to the final gear 25 is not interrupted despite such angular displacement thereof because the swing arms 21 pivot about the axis of the gear 23, with which the final gear remains in mesh via the gear 24.
  • the Harmonic Drive speed changer 20a may be operated via the speed control motor 32 in order to cause the impression cylinder 8 to rotate at an optimum speed for feeding the paper web P under proper tension.
  • the rotational speed of the impression cylinder 8 is variable totally independently of that of the plate cylinder 6 and blanket cylinder 7. Since the speed changer means 20 are compactly incorporated in the second drive linkage 13b, moreover, none of the interchangeable cylinder assemblies 5' needs to include such means as the second drive linkage 13b, as well as the first 13a, is permanently mounted in each printing unit for common use by all the cylinder assemblies.
  • the cylinder assemblies 5' constructed according to the present invention may be put to use with the conventional machines not having the second drive linkages 13b but only having the first drive linkage 13a in each printing unit.
  • the impression cylinder 8 of each cylinder assembly 5' must be driven via the first drive linkage 13a in this case.
  • the lockpin 18 on the nonrotatable impression cylinder gear 17 may therefore be driven into the hole 16b in the rotatable impression cylinder gear 16 for locking the same against rotation relative to the impression cylinder 8.
  • the impression cylinder 8 will then be driven by the blanket cylinder gear 15 via the locked impression cylinder gear 16.
  • This second embodiment also has two drive linkages, labeled 13a' and 13b', for driving the interchangeable cylinder assemblies in each offset printing unit, but, unlike the first disclosed embodiment, each drive linkage is coupled to a different drive source.
  • the first drive linkage 13a' comprises a train of gears 26-28 and 33-38 through which driving torque is transferred from gearbox 13' to plate cylinder gear 14.
  • the final element 38 of this gear train is to automatically engage the plate cylinder gear 14 as any of the interchangeable cylinder assemblies 5' is installed in the printing unit 5.
  • the gearbox 13' has a built-in clutch 41 for on-off control of power transmission from drive shaft 11 to the plate cylinder gear 14 via the first drive linkage 13a'.
  • a hand lever 42 is provided to the gearbox 13' for such manually performing such on-off control.
  • the second drive linkage 13b' is greatly modified, comprising only three gears 23, 24 and 25 for power transfer from a variable speed electric motor 43 to the nonrotatable impression cylinder gear 17.
  • This motor 43 is intended to serve not only as drive source for the impression cylinder 8 but also as speed changer for adjustably varying its rotational speed for feeding the web under proper tension in the face of such variable factors as the diameter of the impression cylinder in each cylinder assembly, the thickness of the paper in use, and the use or disuse of moistening water.
  • the servomotor is currently recommended for use as impression cylinder drive motor 43 meeting these requirements.
  • the gear 23 meshes with the gear 24 which is coaxially coupled to the gear 25 for joint rotation therewith.
  • the gear 25 meshes with the nonrotatable impression cylinder gear 17.
  • the coaxial gears 24 and 25 are both rotatably supported by the swing arm 21 for angular displacement about the axis of the gear 23.
  • the impression cylinder 8 is provided with the rotatable impression cylinder gear 16 in addition to the nonrotatable impression cylinder gear 17.
  • the rotatable impression cylinder gear 16 meshes with the blanket cylinder gear 15 and can be locked against rotation relative to the impression cylinder 8 by the lockpin 18.
  • the trunnions 7a and 8a of the blanket cylinder 7 and impression cylinder 8 are journaled in eccentric sleeve bearings 44 and 45, respectively, which are themselves rotatably mounted to the confronting frame walls of the cylinder assembly 5'.
  • the blanket cylinder 7 and the impression cylinder 8 are movable into and out of contact with each other by revolving the eccentric bearings 44 and 45 with respect to the frame walls by any such convenient means as fluid actuated cylinders, worm gears, or rack-and-pinion mechanisms. Notwithstanding the showing of Figure 6, however, only either of the two cylinders 7 and 8 may be moved toward and away from the other.
  • the hand lever 42 on the gearbox 13' may be operated to engage the clutch 41 built into the gearbox.
  • the output torque of the gearbox 13' will then be transmitted to the plate cylinder gear 14 via the first drive linkage 13a', resulting in the joint rotation of the plate cylinder 6 and blanket cylinder 7 via the intermeshing gears 14 and 15.
  • the impression cylinder 8 is driven from the impression cylinder drive motor 43 via the modified second drive linkage 13b'.
  • the speed of the motor 43 may be adjusted for synchronizing the rotation of the impression cylinder 8 to that of the blanket cylinder 7 and, further, for causing the paper web to be fed by the impression cylinder under proper tension.
  • the plate cylinder 6 and blanket cylinder 7 will be both set out of rotation upon disengagement of the gearbox clutch 41.
  • the impression cylinder 8 will be set out of rotation by stopping the impression cylinder motor 43.
  • the impression cylinder 8 can be held in rotation while the plate cylinder 6 and blanket cylinder 7 are out of rotation.
  • the blanket cylinder 7 and impression cylinder 8 may be moved out of contact with each other by revolving either or both of the eccentric bearings 44 and 45 relative to the frame walls of the cylinder assembly 5'.
  • FIG. 7 shows four offset printing units 5 1 , 5 2 , 5 3 and 5 4 aligned for production of business forms.
  • the first two printing units 5 1 and 5 2 are for printing two-color images, the last two printing units 5 3 and 5 4 for selectively printing different shop names. It is understood that at least these two printing units 5 3 and 5 4 are each constructed as hereinbefore described with reference to Figures 5 and 6.
  • the blanket cylinder 7 and impression cylinder 8 of the fourth printing unit 5 4 may be held away from each other, and the impression cylinder 8 of that printing unit 5 4 may be driven from the electric motor 43 via the second drive linkage 13b' for feeding the web P toward the next processing station. Both plate cylinder 6 and blanket cylinder 7 of the fourth printing unit 5 4 may be held out of rotation by declutching the gearbox 13'.
  • the web will be printed thereon the images by the first two printing units 5 1 and 5 2 and the shop name A by the third printing unit 5 3 .
  • the printing plate bearing the shop name B may be mounted to the plate cylinder 6, which has been out of rotation, of the fourth printing unit 5 4 by manually revolving the same.
  • the blanket on the blanket cylinder 7 of this printing unit 5 4 may be washed clean of ink and other foreign matter.
  • the blanket cylinder 7 and impression cylinder 8 of the third printing unit 5 3 may be moved away from each other, the plate cylinder 6 and blanket cylinder 7 set out of rotation, and only the impression cylinder 8 maintained in rotation. Further the blanket cylinder 7 and impression cylinder 8 of the fourth printing unit 5 4 , in which the shop name B printing plate has been mounted as above to the plate cylinder 6, may be moved against each other via the running web.
  • the clutch lever 42 on the gearbox 13' may be engaged for driving the plate cylinder 6 and blanket cylinder 7 via the first drive linkage 13a'.
  • the printing plate on the plate cylinder 6 of the third printing unit 5 3 which has been kept out of rotation since the completion of the printing of the business forms with the shop name A, may be replaced by that carrying the shop name C by manually turning the cylinder.
  • the blanket on the blanket cylinder 7 of this printing unit 5 3 may be cleaned as required.
  • the fourth printing unit 5 4 may be set out of operation to discontinue printing the shop name B, and the third printing unit 5 3 set into operation again for printing the shop name C.
  • the details of operation involved in such switching from shop name B to shop name C are akin to those set forth above in connection with switching from shop name A to shop name B.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Advancing Webs (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (11)

  1. Presse à imprimer offset alimentée sur toile, convenant à la production de formulaires commerciaux, entre autres applications, comprenant une pluralité d'unités d'impression offset en série, dans chacune desquelles une image encrée est imprimée à partir d'un cylindre-plaque (6) sur un cylindre-couverture (7), et ainsi transférée vers une toile (P) circulant contre un cylindre d'impression (8), caractérisée en ce que chacune des unités d'impression comprend une première transmission d'entraínement (13a ou 13a') pour entraíner le cylindre-plaque (6) et le cylindre-couverture (7), une deuxième transmission d'entraínement (13b ou 13b') pour entraíner le cylindre d'impression, et un moyen de changement de vitesse (20 ou 43) accouplé à la deuxième transmission d'entraínement pour faire varier de manière ajustable, la vitesse de rotation du cylindre d'impression.
  2. Presse à imprimer offset alimentée sur toile selon la revendication 1, caractérisée en ce que la première transmission d'entraínement (13a) et la deuxième transmission d'entraínement (13b) sont toutes deux connectées à une source d'entraínement commune (13).
  3. Presse à imprimer offset alimentée sur toile selon la revendication 2, caractérisée en ce que la première transmission d'entraínement (13a) et la deuxième transmission d'entraínement (13b) sont toutes deux des trains d'engrenages et en ce que le moyen de changement de vitesse (20) est inséré entre deux engrenages choisis (22 et 23) de la deuxième transmission d'entraínement.
  4. Presse à imprimer offset alimentée sur toile selon la revendication 1, dans laquelle le cylindre-plaque (6), le cylindre-couverture (7), et le cylindre d'impression (8), forment des parties de chaque jeu d'assemblages de cylindres interchangeables (5') qui doivent être montés sur la presse à imprimer et démontés de celle-ci, de façon sélective, caractérisée par le fait qu'elle comprend un engrenage (14) de cylindre-plaque pouvant tourner solidairement avec le cylindre-plaque (6) et capable de venir en prise par entraínement avec la première transmission d'entraínement (13a), un engrenage (15) de cylindre-couverture pouvant tourner solidairement avec le cylindre-couverture (7) et s'engrenant avec l'engrenage de cylindre-plaque, un engrenage (17) de cylindre d'impression non rotatif, pouvant tourner solidairement avec le cylindre d'impression (8), et capable de venir en prise par entraínement avec la deuxième transmission d'entraínement (13b), un engrenage (16) de cylindre d'impression rotatif coaxial avec le cylindre d'impression et s'engrenant avec l'engrenage de cylindre-couverture, et un moyen (16b, 18) pour verrouiller l'engrenage de cylindre d'impression rotatif contre une rotation par rapport au cylindre d'impression et pour déverrouiller l'engrenage de cylindre d'impression rotatif du cylindre d'impression.
  5. Presse à imprimer offset alimentée sur toile selon la revendication 4, caractérisée en ce que le moyen de verrouillage comprend une goupille de verrouillage (18) montée de façon excentrée sur l'engrenage (17) de cylindre d'impression non rotatif en vue d'un mouvement d'engrènement et de désengrènement avec l'engrenage (16) de cylindre d'impression rotatif.
  6. Presse à imprimer offset alimentée sur toile selon la revendication 4, caractérisée en ce que la deuxième transmission d'entraínement (13b) comporte un engrenage final (25) que l'on peut déplacer en vue d'un embrayage et d'un débrayage avec l'engrenage (17) de cylindre d'impression non rotatif de chacun des assemblages de cylindres interchangeables (5').
  7. Presse à imprimer offset alimentée sur toile selon la revendication 6, caractérisée en ce que l'engrenage final (25) de la deuxième transmission d'entraínement (13b) est monté sur des moyens support (21) pour un déplacement angulaire autour de l'axe d'un autre engrenage (23) incorporé dans la deuxième transmission d'entraínement, et en ce qu'un actionneur linéaire (19) est monté sur les moyens supports (21) pour déplacer l'engrenage final (25) en vue d'un embrayage et d'un débrayage avec l'engrenage (17) de cylindre d'impression non rotatif de chacun des assemblages de cylindres interchangeables (5').
  8. Presse à imprimer offset alimentée sur toile selon la revendication 1, caractérisée en ce qu'au moins l'un ou l'autre du cylindre-couverture (7) et du cylindre d'impression (8) est rendu mobile pour être mis en contact ou hors contact avec l'autre, et en ce que des moyens (41, 42) sont prévus pour connecter la première transmission d'entraínement (13a') à une source d'entraínement (13') et la déconnecter de celle-ci pour le cylindre-plaque (6) et le cylindre-couverture (7) .
  9. Presse à imprimer offset alimentée sur toile selon la revendication 8, caractérisée en ce que le cylindre-couverture (7) et le cylindre d'impression (8) sont montés à rotation sur des moyens à armature par l'intermédiaire de paliers excentrés (44, 45) pour un déplacement relatif de mise en contact et de mise hors contact mutuelles.
  10. Presse à imprimer offset alimentée sur toile selon la revendication 1, caractérisée en ce que la première transmission d'entraínement (13a') est connectée à une première source d'entraínement (13') et en ce que la deuxième transmission d'entraínement (13b') est connectée à une deuxième source d'entraínement (43) qui sert également de moyen de changement de vitesse.
  11. Presse à imprimer offset alimentée sur toile selon la revendication 1, caractérisée en ce que le moyen de changement de vitesse comprend un moteur à vitesse variable (43) connecté à la deuxième transmission d'entraínement (13b') pour entraíner le cylindre d'impression.
EP20000107360 1999-04-28 2000-04-05 Presse offset à bobines pour la production de formulaires commerciaux ou similaires Expired - Lifetime EP1048459B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP15845799 1999-04-28
JP15845799 1999-04-28
JP23367999 1999-08-20
JP23367999A JP4318109B2 (ja) 1999-04-28 1999-08-20 フォーム印刷機における印刷部の紙送り速度調整装置

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EP1048459A1 EP1048459A1 (fr) 2000-11-02
EP1048459B1 true EP1048459B1 (fr) 2003-12-03

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Publication number Priority date Publication date Assignee Title
DE10058841B4 (de) * 2000-11-27 2009-07-30 Koenig & Bauer Aktiengesellschaft Verfahren zur Regelung eines Umfangsregisters
JP2006250202A (ja) * 2005-03-09 2006-09-21 Komori Corp ローラの回転駆動伝達装置
JP5113353B2 (ja) * 2006-07-18 2013-01-09 株式会社ミヤコシ 交換胴型輪転機
JP7312677B2 (ja) * 2019-02-06 2023-07-21 三菱重工機械システム株式会社 ウェブの張力調整装置および方法並びに印刷機

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE457864B (sv) * 1983-11-30 1989-02-06 Taiyo Tekko Kk Tryckpress
JPS63117864A (ja) * 1986-11-04 1988-05-21 Fuji Kikai Kogyo Kk フオ−ム印刷機における印刷部の紙送り調節装置
US4785734A (en) * 1986-11-04 1988-11-22 Fuji Kikai Kogyo Co., Ltd. Apparatus for controlling paper transfer speed of a printing section of a form printing machine
US5765482A (en) * 1996-10-02 1998-06-16 Integrated Design Corporation Web printing apparatus
DE29810922U1 (de) * 1998-06-18 1998-09-03 Maschinenfabrik Goebel Gmbh, 64293 Darmstadt Einrichtung zum drehbaren Antreiben

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DE60006888D1 (de) 2004-01-15
JP2001010752A (ja) 2001-01-16
DE60006888T2 (de) 2004-05-19
JP4318109B2 (ja) 2009-08-19
EP1048459A1 (fr) 2000-11-02

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