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
  • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
  • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
  • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
  • B41P2227/20—Means enabling or facilitating exchange of tubular printing or impression members, e.g. printing sleeves, blankets
  • B41P2227/21—Means facilitating exchange of sleeves mounted on cylinders without removing the cylinder from the press
• • 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
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49544—Roller making
  • Y10T29/49547—Assembling preformed components
  • Y10T29/49558—Includes securing removable cover on 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
  • Y10T29/53909—Means comprising hand manipulatable tool
  • Y10T29/53943—Hand gripper for direct push or pull
  • Y10T29/53952—Tube sleeve or ferrule applying or removing
• • 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
  • Y10T29/53987—Tube, sleeve or ferrule

Definitions

• the present invention relates to a device for removing a pressure sleeve from a cantilevered cylinder base body according to the preamble of claim 1 and claim 5.
• US Pat. No. 5,429,048 describes an offset printing machine in which a material web to be printed is guided through a series of printing units.
• Each of the printing units comprises a plate cylinder, a blanket cylinder and an impression cylinder, which can be designed as a second blanket cylinder.
• a flat, illustrated printing plate can be applied to the plate cylinder.
• a sleeve-shaped blanket can be attached around the blanket cylinder.
• the plate cylinders and blanket cylinders are stored in the frame of the printing unit.
• a portion of the frame adjacent to an axial end of the blanket cylinder is movably arranged such that it can be opened and in this way can release one end of the blanket cylinder.
• the removable sleeve-shaped rubber blanket can be moved axially through the opening in the frame.
• air lines are also provided, through which air is conducted to the outer surface of the blanket cylinder.
• air flows from the interior of the blanket cylinder, which is acted upon by compressed air, to the inside of the blanket, so that it is stretched onto the blanket cylinder when it is pushed on.
• the compressed air supply can be switched off.
• the blanket then contacts the outer surface of the blanket cylinder and tightly encloses the blanket cylinder. To remove the blanket, it is again pressurized with compressed air and removed manually.
• a disadvantage of the printing press described in this document is that the inner surface of the rubber blanket or the outer surface of the rubber blanket cylinder can be contaminated, for example by printing ink or other substances which remain undetected on the inner surface of the rubber blanket. This will remove the blanket by applying compressed air to the inside of the blanket axial pulling of the rubber blanket difficult. Furthermore, manufacturing-related defects and the environmental conditions such as moisture and temperature can impair the removability of the rubber blanket.
• No. 4,913,048 describes a printing press with a sleeve-shaped, channelless printing form or printing plate, which can be provided with a printed image.
• This sleeve-shaped printing form is axially removable from the plate cylinder and can be applied to the plate cylinder by stretching the printing form by means of pressure from a printing medium. The sleeve-shaped printing form is then pushed manually onto the plate cylinder and relieved of pressure.
• the same disadvantages occur here as in the printing machine described in US Pat. No. 5,429,048.
• No. 5,745,968 describes a device for applying a sleeve-shaped printing form to the base body of a floating rubber blanket cylinder, which has a conical ring body fastened to a base plate by means of spacers, which can be inserted precisely into the interior of the sleeve.
• a lip-shaped ring arranged on the conical ring body limits the depth of penetration of the ring body into the interior of the sleeve and, when the sleeve is pushed on, dampens the unpleasant whistling noises that are generated by the air flowing out to expand the sleeve.
• This tool is not suitable for completely pushing the sleeve onto the cylinder base body or for pulling a sleeve arranged on the cylinder off the cylinder.
• DE 43 41 246 C1 describes a device for handling sleeves on cylinders, which enables sleeves to be exchanged when the paper web is drawn in.
• a sleeve detection system is assigned to each of the cylinders provided for receiving sleeves, by means of which a power means can be activated for the non-positive or positive locking of the respective sleeve within the printing unit. Upon detection, the respective sleeve can be displaced in the correct position on the cylinder in the axial direction between the side walls of the printing unit by means of the system.
• US 5,309,797 which is to be assigned to a remote specialist field, describes a tensioning device for changing oil filters, which has an annular band and a lever arm which interacts with the band.
• the band is placed around the oil filter in the circumferential direction and tensioned by means of the lever arm so that the oil filter can be rotated in the circumferential direction.
• the clamping device disclosed is provided for rotating an oil filter in the circumferential direction.
• EP 0 053 791 A1 describes a device for applying and removing intaglio printing sleeves to a cylinder core, the cylinder core removed from a printing press being arranged in a vertical direction and the sleeve being pressed onto the core or from the core with a pressing device.
• a ring preferably made of steel, is placed against one end of the core and the sleeve mounted thereon and moved along the core with a force.
• the ring has a bearing surface for the edge of the sleeve and an opening for the core, so that when the ring is moved, the core is moved through the opening while the sleeve is gripped and pushed off the bearing surface.
• the ring has an edge with a centering surface and can be in two parts and with a clamping device, for. B. springs, for pressing the halves against the sleeve.
• the present invention provides a device which makes it easier for the machine operator to remove a pressure sleeve.
• a device for removing a printing sleeve, in particular a blanket sleeve or a printing plate sleeve, from a cantilevered cylinder base body in a rotary printing press, with contact elements that can be positioned axially over the circumference of the printing sleeve and that can be adjusted on the circumferential surface of the printing sleeve while generating a frictional force, is characterized in that that the contact elements are formed by a band which engages around the pressure sleeve and can be tensioned around the pressure sleeve by means of a rotatable tensioning device.
• the device is preferably retractable through an opening in the side wall of the printing press and helps the operator to grip the sleeve at one end and to pull it out of the opening.
• the device is quick and easy to use and allows the machine operator to use a rubber blanket or other type of pressure sleeve in the shortest possible time and without physical effort or the risk of injury, e.g. B. on sharp-edged parts.
• the device comprises a first semicircular band and a second semicircular band. More than one band and / or more than one tensioning device can be provided in order to generate a uniform tensile or compressive force on the pressure sleeve. In this way, the risk of the pressure sleeve sticking to the cylinder base body when it is removed due to jamming can be minimized.
• the straps can be connected at both ends by means of a tensioning device, so that the removal device has a circular shape and can be placed axially above the pressure sleeve. This form of the device according to the invention has the advantage that the device can be used quickly and easily and makes it much easier for the machine operator to remove a pressure sleeve.
• the tensioning device preferably comprises a first side plate and a second side plate, in each of which a first and a second pin are mounted.
• the pins are preferably attached to the side plates in a rotationally fixed manner, and at least one of the pins is attached to an actuating rod or actuating rod.
• One end of the first band is preferably rotatably connected to the first pin and one end of the second band is preferably rotatably connected to the second pin.
• the tensioning device By rotating a handle arranged on the adjusting rod of at least one of the tensioning devices, the tensioning device is rotated so that the effective diameter of the circle formed by the first and second semicircular band is reduced.
• two clamping devices are actuated to reduce the effective diameter.
• the pressure sleeve can be securely gripped and axially removed or pushed on after the removal device has been placed around the pressure sleeve and the clamping devices have been actuated.
• the embodiments of the present invention enable effective removal of pressure sleeves, since the pressure that can be exerted on the pressure sleeve is higher than in the case of a purely manual removal.
• One end of the pressure sleeve can, for example, have a curvature or a section with a somewhat larger diameter.
• the diameter of the removal device on the curvature can be reduced, so that the removal device can act directly on the curvature and is not solely dependent on the clamping and frictional force.
• a device for removing a printing sleeve, in particular a blanket sleeve or a printing plate sleeve, from a cantilevered cylinder base body in a rotary printing press, with contact elements that can be positioned axially over the circumference of the printing sleeve and that can be adjusted on the circumferential surface of the printing sleeve while generating a frictional force, is characterized in that that the contact elements by a first clamping arm and a with respect to the first clamping arm movable second clamping arm are formed, the ends of which form a pair of pliers for gripping the pressure sleeve.
• Gripping attachments or pads are preferably provided at the ends of the clamping arms to increase the friction.
• the clamping arms are tensioned by moving two handles on the arms towards one another, the handles being arranged at the opposite ends of the clamping arms.
• a motor can be provided for tensioning the clamping arms, which preferably rotates a gearwheel which closes the clamping arms.
• the present invention can be used in particular in connection with axially removable rubber blankets, as are described in US Pat. No. 5,429,048 and US Pat. No. 5,323,702. Due to the compressibility of the outer layer of the rubber blanket, a secure gripping of the rubber blanket by the device is achieved without the inner sleeve of the blanket is compressed, which would cause an undesirable friction between the inner sleeve and the blanket cylinder, which usually makes it difficult to remove the blanket.
• the clamping arms grip the outer surface of the pressure sleeve.
• a device for removing a printing sleeve is arranged on the drive side of the printing press, which comprises a clamp for gripping the printing sleeve in the region of the drive-side end of the sleeve and an actuator connected to the clamp, which axially clamps the sleeve and the sleeve moved away from or towards the drive side.
• the present invention can also be used in connection with other types of pressure sleeves, e.g. B. with the printing plates or printing plate sleeves described in US 4,913,048.
• this expression includes both a blanket sleeve and a printing plate sleeve.
• the device according to the invention does not necessarily have to be used in each blanket pull-off operation. It is Z. B. conceivable that the machine operator first tries to pull the rubber blanket manually and finds that the rubber blanket on the cylinder body z. B. remains stuck due to jamming. In this case, he can reach for the device according to the invention.
• FIG. 1 shows a side view of a printing unit 1 of a web-fed rotary offset printing press, which comprises a schematically illustrated left plate cylinder 2, a left blanket cylinder 3, a right blanket cylinder 4 and a right plate cylinder 5.
• An axially removable blanket 13 is applied to the left blanket cylinder 3 and can be axially applied to the blanket cylinder 3 in the manner described in US Pat. No. 5,429,048.
• An axially removable blanket 14 is also applied to the right blanket cylinder 4.
• a material web for. B. a paper web, through a pressure gap formed between the left blanket 13 and the right blanket 14.
• the rubber blankets 13 and 14 may stick, however, and may be difficult to remove, e.g. B. due to manufacturing-related defects, pollution or environmental conditions such as humidity or temperature.
• the blanket cylinders 3, 4 are preferably movable in the manner, ie from each other adjustable that they can each take a position in which they do not contact any of the other cylinders.
• FIG. 2 an inventive device 20 for removing printing sleeves is shown, the removal of printing sleeves such. B. the blankets 13 and 14 relieved if they stick.
• the embodiment shown in FIG. 2 includes a first band 22 and a second band 24, both of which are each preferably about 2.5 cm (1 inch) wide and made of tissue material, steel or another metal.
• the bands are preferably designed to be inherently rigid in accordance with the circular shape of the pressure sleeve and are connected at one end via a first clamping device 26 and at the other end via a second clamping device 28.
• the first tensioning device 26 comprises a first side plate 32 and a second side plate 34. Between the side plates 32 and 34, a first pin 36 and a second pin 38 are preferably attached in a rotationally fixed manner.
• An adjusting rod 39 is either connected to the second pin 38 or forms an integral extension of the same.
• the rod 39 can also be connected to one of the side plates 32 and 34 in a rotationally fixed manner.
• the diameter of the pins is, for example, about 0.478 cm (0.188 inch) and the diameter of the adjusting rod is about 0.795 cm (0.313 inch).
• the control rod can be made of metal, for example steel.
• the side plates are also preferably made of metal, for example steel.
• the length of the control rod 39 is preferably about 38 cm (15 inches). At the other end of the control rod 39, a handle 37 is attached.
• the second tensioning device 28 comprises a first side plate 42 and a second side plate 44, a first stationary pin 46 and a second stationary pin 48.
• An adjusting rod 49 is connected to the first stationary pin 46 or forms an integral part of the same and includes a handle 47 at its other end.
• the removal device 20 has an effective diameter d which corresponds to the outer diameter of the sleeve to be removed or is somewhat smaller than this.
• d an effective diameter of the doffing device.
• FIG. 3 shows a schematic side view of the removal device 20 shown in FIG. 2 in an untensioned state in which it is positioned axially above the rubber blanket 14 shown in FIG. 1.
• the rubber blanket preferably comprises a compressible layer 64 and an inner sleeve 54.
• the compressible layer 64 can be formed as a composite of several layers, which comprises a non-compressible layer, e.g. B. from a rubber material which has essentially no voids, and a compressible layer, for. B. from a rubber material having cavities.
• the device 20 is positioned over the blanket 14 by the operator of the machine.
• FIG. 4 shows a schematic side view of the removal device 20 stretched around the rubber blanket 14.
• the first and second tensioning devices 26 and 28 are operated by the machine operator by rotating the handles 37 and 47 shown in FIG. 2 on the adjusting rods 39 and 49 in the direction of the arrows 66 and 68, i. H. clockwise.
• the first band 22 is preferably wound around the second pin 38 and rotatable about the pin 38.
• the second band 24 is rotatable about the first pin 36.
• Rotation of the handle 37 (FIG. 2) stationary with respect to the pins and side plates causes a clockwise movement of the tensioning device 26 from the position shown in FIG. 3 to the position shown in FIG. 4.
• the effective diameter of the removal device 20 is reduced and the straps 22 and 24 are stretched around the rubber blanket 14.
• the compressible layer 64 is compressed so that the rubber blanket can be pulled axially through the opening 10 shown in FIG. 1.
• the tensioning devices 26, 28 can optionally also be rotated further clockwise, so that the removal device 20 exerts an even stronger pressure.
• FIG. 1 An alternative embodiment of the present invention is shown in FIG.
• a plurality of inherently rigid strip or band-shaped elements 80 are spaced circumferentially around an annular base 82 in such a way that the Widen or spread out elements towards the sleeve end.
• a spring 81 is assigned to each of the elements 80, which presses the respective element 80 against a slide ring 84.
• the ring base 82 comprises a pull ring 86 or a plurality of pull rings 86, by means of which the ring base 82 can be pulled in the direction of the machine operator.
• the alternative embodiment works as follows: The machine operator positions the elements over the pressure sleeve 14 and then moves the slide ring 84 or the clamping device towards the sleeve 14, which has a center line 88. In this way, the respective ends of the elements are pressed towards the center line against the sleeve 14 and grasp it. The sleeve 14 can then be removed by the machine operator by pulling the pull ring 86 with
• the first embodiment of the invention was described using a two-band structure; however, it is also possible to use only a single band.
• printing sleeve chosen in the present specification is intended to encompass any type of sleeve used in a printing press, e.g. B. a ductless printing plate or printing form or a rubber blanket.
• band refers to any elongated structure with any cross-section, e.g. B. also, as previously described, with a rectangular cross section or a round, cable-like cross section.
• the device 100 for removing printing sleeves shown in FIG. 7 comprises a first clamping arm 101, which comprises a first end 110 and a second end 112.
• a gripping attachment 114 with a preferably roughened inner surface 115 is arranged at the first end 110.
• a second clamping arm 102 is an integral part of a base 103 and comprises a first end 120, on which a gripping attachment 124 with a roughened surface 125 is also arranged.
• the second end 112 of the first clamping arm 101 is preferably fixedly connected to a gear 134 which, for. B. is rotatably supported by a pin 113 in the base 103.
• a drive gear 116 which is also rotatably mounted in the base 103, engages with the gear 134 and is connected, for example, to an electric motor which drives the drive gear 116 in a known manner.
• the rotation of the drive wheel 116 causes the gear 134 to open or close the clamp arm 102 with respect to the clamp arm 101.
• the clamping arms 101, 102 are placed around the pressure sleeve, e.g. B. by being introduced by the machine operator through an opening in the operator side of the printing unit.
• the removal device according to FIG. 7 can also operate in a robot-controlled manner instead of being operated manually by the device operator.
• the two ends 110 and 120 of the clamping arms 101, 102 are preferably, but not necessarily, bent in accordance with the size of the rubber blanket or the pressure sleeve 14 or adapted in terms of their curvature.
• the drive motor can then be activated so that due to a rotation of the drive wheel 116 in the counterclockwise direction, which in turn causes the gear 134 to rotate clockwise, the clamping arm 101 is pivoted about the axis of the pin 113 and the gripping attachments 114, 124 grip the rubber blanket 14 ,
• FIG. 8 shows a further pincer-shaped embodiment of a removal device 200 according to the invention, which comprises two clamping arms 201 and 202 which can be rotated about a pin 213.
• a handle 212 or 222 is arranged, by means of which a machine operator can close the clamping arms of the removal device, so that they make it easier to pull off a pressure sleeve.
• Gripping attachments 214 and 224 can also be provided, which are preferably designed similarly to the gripping attachments 114, 124 described below in connection with FIG. 10.
• the gripping attachment 414 has teeth 415, which provide additional grip and are therefore particularly well suited for use with rubber blankets, since the teeth e.g. B. be made of a hard elastomer or metal and can penetrate into the rubber layer, but this is preferably not damaged.
• FIG. 11 shows a further embodiment of a removal device 300 according to the invention which is arranged on the drive side and which can be used either in conjunction with one of the previously described embodiments or individually in order to make it easier for a machine operator to remove a pressure sleeve.
• the printing unit 1 comprises a drive-side frame 301, in which a blanket cylinder 4 is overhung.
• a rubber blanket 14 with an inner sleeve or carrier sleeve 54 and one or more compressible layers 64 is applied to the outer surface of the blanket cylinder 4 - or more precisely the base body of the blanket cylinder.
• the blanket cylinder 4 can be driven via a drive shaft 6 connected to a gear 16.
• the drive-side removal device 300 comprises a guide bush 306 fastened to the frame 301 and surrounding the drive shaft 6.
• the drive shaft 6 can be rotated in the guide bush 306 either contactlessly or freely via a bearing arrangement.
• An adjusting disk 307 is slidably arranged on the guide bush 306 and can be moved back and forth along the guide bush 306 by means of one or two pneumatic cylinders 308.
• Two clamping arms 302 and 303 are arranged so as to be radially movable with respect to the adjusting disc 307. The clamping arms 302 and 303 are moved radially with respect to the adjusting disc 307, for example, by means of two curves 309, 310 arranged on the guide bush 306.
• FIG. 14 shows a sectional view of the embodiment shown in FIG. 11 through the plane XIV-XIV shown in FIG. 11.
• the drive shaft 6 is arranged within the stationary guide bush 306.
• the adjusting disk 307 is moved over the sections 311, 312 along the guide bush 306, the sections 311, 312 either being an integral part of the adjusting disk 307 or being fastened to the latter.
• the pneumatic cylinder 308 (FIG. 12) preferably acts on one of these sections 311, 312.
• the sections 311, 312 preferably have bearings which reduce the friction along the guide bush 306.
• Curves 309, 310 are attached to the outside of the bushing 306, which, as shown in FIG. 11, are beveled downwards in the direction of the blanket cylinder 4 or run inclined. Arms 302 and 303 are urged against curves 309 and 310 by springs 313, 314, respectively. The arms 302, 303 preferably also have bearings which reduce the friction.
• arms 302, 303 move radially inward with respect to disc 307 due to the radially inward slope of curves 309, 310 due to the spring force of springs 313, 314 when cylinder 308 disc 307 moved to the blanket cylinder 4. In this way, the rubber blanket 14 is firmly gripped by the arms 302, 303.
• the rubber blanket 14 is then pushed off the cylinder 4 when the disk 307 moves further.
• the curves 309, 310 can be beveled upwards at points 329, 330, so that the arms 302, 303 are moved upwards and release the rubber blanket 14.
• the rubber blanket can now be removed by an operator either by hand or using one of the operator-side tools described with reference to the preceding embodiments of the present invention.

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• Rotary Presses (AREA)
• Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Applications Claiming Priority (4)

Publications (3)

Family

ID=27026640

Family Applications (1)

Country Status (4)

Families Citing this family (17)

Family Cites Families (24)

• 2000
  • 2000-03-31 US US09/540,790 patent/US6386103B1/en not_active Expired - Fee Related
  • 2000-09-12 DE DE50005876T patent/DE50005876D1/de not_active Expired - Lifetime
  • 2000-09-12 DE DE10044909A patent/DE10044909A1/de not_active Withdrawn
  • 2000-09-12 EP EP00119801A patent/EP1093914B1/de not_active Expired - Lifetime
  • 2000-10-19 JP JP2000319666A patent/JP4669115B2/ja not_active Expired - Fee Related

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