EP0614838B1 - Douille de pression interchangeable - Google Patents

Douille de pression interchangeable Download PDF

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Publication number
EP0614838B1
EP0614838B1 EP93119506A EP93119506A EP0614838B1 EP 0614838 B1 EP0614838 B1 EP 0614838B1 EP 93119506 A EP93119506 A EP 93119506A EP 93119506 A EP93119506 A EP 93119506A EP 0614838 B1 EP0614838 B1 EP 0614838B1
Authority
EP
European Patent Office
Prior art keywords
nip
transporting device
sleeve
engageable
roller
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
EP93119506A
Other languages
German (de)
English (en)
Other versions
EP0614838A1 (fr
Inventor
David C. Burke
Mike A. Novick
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 EP0614838A1 publication Critical patent/EP0614838A1/fr
Application granted granted Critical
Publication of EP0614838B1 publication Critical patent/EP0614838B1/fr
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
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53657—Means to assemble or disassemble to apply or remove a resilient article [e.g., tube, sleeve, etc.]

Definitions

  • the present invention relates to a device for transporting material webs in a rotary printing press or in a folder, and in particular to an exchangeable pressure sleeve which can be applied to an adjustable pressure roller.
  • the known web transport devices have a fixed, driven transport roller and at least one narrow, adjustable pressure roller. These narrow, adjustable pressure rollers have a disadvantageous effect in folders.
  • the width of a strand of a material web can change with each new operation. If this is the case, the narrow pressure rollers must be adjusted so that they contact both edges of a strand. This means that bolts have to be loosened, with which the pressure rollers are fastened on an axis, and rings, with which each pressure roller is connected, are moved into the correct position and then the bolts have to be tightened again.
  • the pressure rollers do not have to operate with a high pressure force, they tend to separate from the fixed, driven transport roller with each vibration-related impact. This leads to phase voltage differences.
  • the contact force of the rollers was increased, but not the pressure force generated by the pressure rollers, since a mechanical lock was installed that determined the gap between the rollers.
  • this mechanical lock is cumbersome and time-consuming and normally has to be carried out for each new operation.
  • British Patent No. 1,457,989 discloses a bearing mounted carrier which is moved by two cylinders to which a pressure medium is supplied via a conventional pressure line. The force of the pressure can be selected via a control. A connection of the individual chambers of the cylinders to one another causes a displacement of the volume of liquid from one chamber to the other as a result of volume fluctuations, as a result of which the position of a lever attached to one side is stabilized and the web tension is accordingly kept constant.
  • the U.S. U.S. Patent No. 3,083,887 discloses a device having a cylinder to which a pressure medium is supplied, thereby bending a lever attached to one side to thereby respectively increase or decrease the belt tension of a drive via a roller.
  • One solution to these problems has been to provide an activating device for applying a variable, full-width pressure roller to a fixed, driven transport roller in order to act on it.
  • Such a device pulls essentially wrinkle-free webs, which can consist of several web strands, with a constant web tension through a folder. This enables the formation of an accurate longitudinal fold in the gap between the adjustable, full-width pressure roller and the transport roller.
  • a damping device which acts simultaneously with the activation device on the full-width pressure roller, stabilizes the position of this adjustable pressure roller and prevents or limits the build-up of vibrations.
  • a belt conveyor has become known from EP 0 205 700 A1.
  • the contact pressure between the surfaces of two rollers is applied by packets of disc springs which act on the bearing points of the upper rollers and thus press the surface of the upper roller against that of the lower roller.
  • DE 40 38 219 A1 discloses a roller for the transport of sheet and sheet material, the surface of which alternately has corrugated metal strips and elastic ring coverings which protrude slightly.
  • a polished metallic Grooves are incorporated into the core roller.
  • a formable, later curing, optionally adhesive material is applied in a certain layer thickness.
  • An elastic ring covering with recesses is pre-tensioned and pulled over the roller body. It snaps into the grooves, the malleable material being pressed into the recess in the ring covering and forming a positive connection here after hardening.
  • This positive connection makes it possible to pull the ring coverings onto the roller base body without tension or with only a small amount of tension and thus to avoid cracking, marking and bursting of the elastic ring coverings during the subsequent regrinding process or during the production of folding products.
  • An advantage of the present invention is that in this device the worn pressure sleeve can be removed and replaced with a new one. This eliminates the need to overhaul worn or damaged pressure rollers.
  • the interchangeable compression sleeve of the present invention also includes a compressible layer of material. This compressible area increases the shock absorbing ability, improves tension uniformity.
  • the interchangeable pressure sleeve of the present invention has at least one annular gap along its longitudinal axis.
  • This annular gap has the advantage that the material web can curl without permanent creases or creases.
  • the present invention also provides a device which serves as a counterweight or balance for the pressure roller while it is in a maintenance position when the removable pressure sleeve is replaced.
  • This has the advantage that the interchangeable pressure sleeve can be axially removed from one side of the adjustable pressure roller or can be applied to it without the pressure roller having to be completely removed from the printing press.
  • the web transport device shown in Fig. 1 comprises a rotatable, driven transport roller 10 which is mounted in a support bearing attached to a frame of a printing press or a folder. Opposite the driven transport roller 10 is an adjustable pressure roller 12 with an interchangeable pressure sleeve 14 mounted thereon, which is brought into contact with the driven transport roller 10.
  • the adjustable pressure roller 12 is of full width, i. H. that it has a width corresponding to the maximum width of a material web that can be processed in the printing press.
  • a material web 16 shown in FIG. 2 consists of at least one strand and is located between the driven transport roller 10 and the adjustable pressure roller 12.
  • the adjustable pressure roller 12 is set by arms 18 and 20.
  • the arms 18 and 20 comprise an activation device 22, which has a control 24 connected to it, and a damping element 26, which has a control 28 connected to it, as shown schematically in FIG. 2.
  • the activating device 22 assigns a precisely metered activating or positioning force, while the build-up of vibrations by the damping element 26, which is connected either in parallel or in series with the activating device 22, is prevented.
  • the activation device 22 can be preset by the Control 24 take place, and a change in the damping property of the damping element 26 can be done by the controller 28.
  • the pressure sleeve is hollow and tubular, it is fixedly connected to the adjustable pressure roller 12 and rotates with it under the influence of the driven transport roller 10. However, the pressure sleeve 14 can be removed from the adjustable pressure roller 12 and replaced, as explained below.
  • the pressure sleeve 14 can be constructed in a variety of ways. In the embodiment of the present invention shown here, the pressure sleeve 14 consists of a laminate. Thus, the pressure sleeve 14 comprises a cylindrical outer layer 30, which has a smooth, continuous outer surface 32, as shown in FIG. 3.
  • the cylindrical outer layer 30 preferably consists of a very thin, non-compressible material of medium hardness, such as natural rubber or synthetic rubber.
  • the smooth outer surface 32 of the pressure sleeve 14 has no gaps or seams, except for one or more annular gaps 36 formed along the axial length of the pressure sleeve, as shown in FIGS. 1 and 2.
  • the smooth outer surface 32 enables the contactable pressure roller 12 to make reliable contact with the web material 16.
  • annular gaps 36 allow the web material 16 to curl without permanent creases or creases.
  • the number and the widths of the annular gaps can vary depending on the width and thickness of the web material strands moving through the web transport device.
  • a cylindrical intermediate layer 38 is, seen in the radial direction, within the outer layer 30 of the Pressure sleeve 14 arranged as shown in Fig. 3.
  • the intermediate layer 38 has a cylindrical outer surface 40 which is fixedly attached to the cylindrical inner surface 42 of the outer layer 30.
  • the cylindrical intermediate layer 38 consists of a reinforced, elastic, compressible material, e.g. B. from at least one layer of cottonine treated with a polymeric foam rubber. With this compressible material layer, all impacts occurring when the web material runs through the web transport device are absorbed by the pressure sleeve 14.
  • the intermediate layer 38 of the pressure sleeve 14 is fastened to a hollow, elastically expandable, rigid, metal (or plastic) inner layer 44, which has a thin-walled tube 46, and the thin-walled tube 46 is in turn firmly connected to the adjustable pressure roller 12.
  • a cylindrical inner surface 48 of the tube 46 is in contact with a cylindrical outer surface 50 of the adjustable pressure roller 12.
  • the tube 46 is fixed but releasably connected to the adjustable pressure roller 12, so that the complete pressure sleeve 14 can be axially applied to and / or removed from the adjustable pressure roller with a sliding movement. This construction enables the pressure sleeve 14 to be replaced after a period of use.
  • the pressure sleeve 14 described here has an inner layer 44, an outer layer 30 and an intermediate layer 38, this could also have a smaller or larger number of layers, if desired.
  • the pressure sleeve 14 could, for example, have an additional layer made of the same material as that of the outer layer 30, which, seen in the radial direction, is arranged inside the intermediate layer 38 and, seen in the radial direction, outside the inner layer 44.
  • the pressure sleeve 14 and the adjustable pressure roller 12 have a tight fit metal-on-metal or (plastic-on-metal) between the cylindrical metal (or plastic) tube 46 on the inside of the pressure sleeve 14 and the outer surface of the metal adjustable pressure roller 12. This results in a constant diameter from the inner surface 48 of the cylindrical tube 46, which is slightly smaller than the constant diameter from the cylindrical outer surface 50 of the adjustable pressure roller 12.
  • the tight fit between the tube 46 and the adjustable pressure roller 12 must be strong enough so that the pressure sleeve 14 can grip firmly on the lateral surface of the adjustable pressure roller 12 during operation of the printing press or the folder, so that no slip occurs between the pressure sleeve 14 and the adjustable pressure roller 12.
  • the tube 46 is tensioned by the adjustable pressure roller 12 to establish a tight pressure ratio between the pressure sleeve 14 and the adjustable pressure roller 12. This pressure ratio tensions the pressure sleeve 14 on the adjustable pressure roller 12, so that there is no relative movement between them during operation of the printing press or the folder.
  • the press or folder includes means for radially stretching the tube 46 on the adjustable pressure roller 12 to release the pressure relationship between the pressure sleeve 14 and the adjustable pressure roller 12, as described below. When the pressure ratio is released, the pressure sleeve 14 can be manually axially removed from the pressure roller 12.
  • the tube 46 must also be radially stretched or radially stretched in order to apply the pressure sleeve 14 to the adjustable pressure roller 12.
  • the printing press or folder is equipped with a device for performing this function equipped as explained below.
  • the activation device 22 moves the adjustable pressure roller 12 into a maintenance position, as shown in FIG. 4. In this position, the pressure sleeve 14 can be axially removed from the adjustable pressure roller 12 and replaced with a new pressure sleeve, which is then axially applied to the adjustable pressure roller by a sliding movement.
  • a support bearing 52 Before the pressure sleeve 14 can be removed from the adjustable pressure roller 12, a support bearing 52 must be removed. This is done by removing two bolts 54 and by pivoting the support bearing 52 away, as shown in FIG. 5. However, before the support bearing 52 can be pivoted away, the arm 18 must be released from the support bearing 52. In the pivoted-down position, the support bearing 52 is held by a releasable spring bolt mounted in a sleeve (not shown). When the support bearing 52 is removed, there is no support for the adjustable pressure roller 12 on the side of the support bearing 52 in the printing press or in the folder. In order that the pressure roller 12 does not fall onto the floor of the printing press or the folder, the present invention provides a counterweight mechanism 56. This counterweight mechanism 56 is preferably located at the end of the pressure roller 12 opposite the support bearing 52 and holds a journal 58 of the pressure roller 12 in place, as shown in FIG. 5.
  • the counterweight mechanism 56 has an articulated arm 60 which is attached at one end to a caliber-like part 62 and at the other end to a lifting part 64.
  • the Caliber-like part 62 is designed so that it fits over the journal 58 and assumes a securing position.
  • the lifting part 64 is in turn connected to a pivoting part 66 which rotates about a fixed point 68 in the printing press or in the folder.
  • the pivot part 66 is in turn with an activating device 70, for. B. an air cylinder, pneumatic cylinder, hydraulic cylinder or the like, connected.
  • the activating device 70 moves the articulated arm 60 via the swivel part 66 and the lifting part 64 until the caliber-like part 62 is firmly seated on the journal 58 of the adjustable pressure roller 12.
  • the activation device 70 brings the pivoting part 66 into a tilted position, as a result of which the counterweight mechanism 56 locks in its position and thus prevents the adjustable pressure roller 12 from falling.
  • An alternative method of removing the pressure sleeve 14 from the adjustable pressure roller 12 would be to remove the roller 12 completely from the press or folder by means of a crane, and then to replace the pressure sleeve 14 outside the machine. Although this would be an acceptable method for replacing the pressure sleeve, the previously described method is preferable because no heavy pressure roller that can be adjusted has to be removed and less machine downtime is associated therewith.
  • the pressure roller 12 In order to manually remove the pressure sleeve 14 from the adjustable roller 12, the pressure sleeve must be elastically stretched by liquid pressure. Therefore, the pressure roller 12 is provided with openings 72 extending in the radial direction, as shown in FIG. 3.
  • openings 72 are spaced from one another at many locations in the radial direction along the length of the adjustable pressure roller 12.
  • the adjustable pressure roller 12 is hollow and is connected by a pipe 74 to a source of hydraulic fluid or compressed air, as shown in FIGS. 1 and 4.
  • the compressed air passed through the pipeline 74 into the interior of the adjustable pressure roller 12 flows through the openings 72 and presses against the inner surface 48 of the tube 46.
  • the tube 46 is elastically stretched to an extent by the compressed air, so that it is possible to manually remove the pressure sleeve 14 from the pressure roller 12 with ease.
  • a new pressure sleeve 14 is manually applied to the adjustable pressure roller 12. After the pressure sleeve 14 has been placed axially on the pressure roller 12, the interior of the roller 12 is connected to the atmosphere. The tube 46 of the new pressure sleeve 14 then shrinks so that it sits securely on the outer surface 50 of the adjustable pressure roller 12. The tube 46 is then held in tension by the pressure roller 12.
  • the amount of air pressure required for the elastic expansion of tube 46 may vary depending on the radial thickness of the tube, the type of material of the tube, and the interference between tube and pressure roller 12.

Landscapes

  • Rotary Presses (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Claims (14)

  1. Dispositif de transport de bande comprenant un rouleau commandé rotatif de transport (10) ayant un axe monté en position fixe, ainsi qu'au moins un rouleau de serrage (12) pouvant être mis en position de service, dont l'axe est sensiblement parallèle à l'axe monté en position fixe, qui peut être mis en position de service contre le rouleau commandé de transport (10) et qui a une longueur correspondant à la largeur maximale d'une bande (16) à traiter dans la machine à imprimer,
       caractérisé
       en ce qu'un unique manchon de serrage interchangeable (14) placé sur le rouleau de serrage (12) pouvant être mis en position de service comporte au moins une rainure annulaire (36) le long de sa longueur axiale afin d'éviter la formation de plis dans la bande (16).
  2. Dispositif de transport de bande selon la revendication 1,
       caractérisé
       en ce que le manchon interchangeable de serrage (14) comporte au moins une couche de matière.
  3. Dispositif de transport de bande selon la revendication 1,
       caractérisé
       en ce que le manchon interchangeable de serrage (14) présente les particularités suivantes :
    une couche extérieure cylindrique (30) ayant une surface extérieure unie, continue, qui représente la surface de l'enveloppe (32) du manchon de serrage (14) :
    une couche intermédiaire cylindrique (38) qui, observée en direction radiale, se trouve à l'intérieur de ladite couche extérieure (30) et ladite couche intermédiaire (38) a une surface cylindrique extérieure (40) qui est assujettie à la surface cylindrique intérieure (42) de ladite couche extérieure (30) ;
    et une couche intérieure tubulaire cylindrique (44), une surface cylindrique intérieure (48) de ladite couche intérieure (44) étant en contact avec une surface extérieure cylindrique (50) du rouleau de serrage (12) pouvant être mis en position de service.
  4. Dispositif de transport de bande selon la revendication 3,
       caractérisé
       en ce que la couche extérieure cylindrique (30) du manchon extérieur interchangeable (14) est en une matière non compressible, très mince, de dureté moyenne.
  5. Dispositif de transport de bande selon la revendication 3,
       caractérisé
       en ce que la couche intermédiaire (38) du manchon interchangeable de serrage (14) est en une matière compressible élastique.
  6. Dispositif de transport de bande selon la revendication 5,
       caractérisé
       en ce que la couche intermédiaire (38) du manchon interchangeable de serrage (14) est renforcée par une toile de coton.
  7. Dispositif de transport de bande selon la revendication 3,
       caractérisé
       en ce que la couche intérieure (44) du manchon interchangeable de serrage (14) est en une matière raide, étirable élastiquement.
  8. Dispositif de transport de bande selon la revendication 3,
       caractérisé
       en ce que le manchon interchangeable de serrage (14) comprend une couche supplémentaire qui est en une matière non compressible, très mince, de dureté moyenne et qui est placée, observée en direction radiale, à l'intérieur de la couche intermédiaire (38) et à l'extérieur de la couche intérieure (44).
  9. Dispositif de transport de bande selon la revendication 1, qui comprend par ailleurs un mécanisme de contrepoids (56) à l'aide duquel le rouleau de serrage (12) pouvant être mis en position de service est stabilisé lorsque le manchon interchangeable de serrage (14) est enlevé de ou placé sur ledit rouleau de serrage (12) pouvant être mis en position de service pendant l'échange sur un côté de celui-ci.
  10. Dispositif de transport de bande selon la revendication 9,
       caractérisé
       en ce que le mécanisme de contrepoids (56) comprend un bras articulé (60) qui est monté à l'une des extrémités sur une pièce (62) en forme de calibre et à l'autre extrémité sur une pièce de levage (64) et la pièce de levage (64) est reliée de son côté à une pièce pivotante (66) qui tourne autour d'un point fixe (68) et la pièce pivotante (66) est reliée de son côté à un dispositif (70) de mise en service qui met en service le mécanisme de contrepoids (56) et met la pièce pivotante (66) à une position inclinée.
  11. Dispositif de transport de bande selon la revendication 10,
       caractérisé
       en ce que la pièce en forme de calibre (62) est connue de manière qu'elle s'ajuste sur un tourillon (58) du rouleau de serrage (12) pouvant être mis en position de service et ainsi bloque à sa position le rouleau de serrage (12) pouvant être mis en position de service.
  12. Dispositif de transport de bande selon la revendication 11,
       caractérisé
       en ce que le dispositif de mise en service (70) déplace le bras articulé (60) jusqu'à ce que la pièce en forme de calibre (62) soit positionnée de manière fiable sur le tourillon (58) du rouleau de serrage (12) pouvant être mis en position de service.
  13. Dispositif de transport de bande selon la revendication 1,
       caractérisé
       en ce que le rouleau de serrage (12) pouvant être mis en position de service comporte au moins un trou (72) orienté radialement et sur lequel un fluide comprimé est dirigé afin d'étirer élastiquement le manchon interchangeable de serrage (14) pendant l'échange.
  14. Dispositif de transport de bande selon la revendication 13,
       caractérisé
       en ce que le rouleau de serrage (12) pouvant être mis en position de service comporte un intérieur creux qui est raccordé à une source d'un fluide comprimé par un conduit (74) par lequel un fluide comprimé parvient à l'intérieur du rouleau de serrage (12) pouvant être mis en service et est dirigé vers l'extérieur par le trou (72) orienté radialement.
EP93119506A 1993-02-23 1993-12-03 Douille de pression interchangeable Expired - Lifetime EP0614838B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2382493A 1993-02-23 1993-02-23
US23824 1993-02-23

Publications (2)

Publication Number Publication Date
EP0614838A1 EP0614838A1 (fr) 1994-09-14
EP0614838B1 true EP0614838B1 (fr) 1997-10-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119506A Expired - Lifetime EP0614838B1 (fr) 1993-02-23 1993-12-03 Douille de pression interchangeable

Country Status (3)

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US (2) US5398604A (fr)
EP (1) EP0614838B1 (fr)
DE (2) DE4340915A1 (fr)

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Also Published As

Publication number Publication date
EP0614838A1 (fr) 1994-09-14
US5398604A (en) 1995-03-21
DE59307550D1 (de) 1997-11-20
US5507226A (en) 1996-04-16
DE4340915A1 (de) 1994-08-25

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