EP0278992B1 - Bogen-Wendeeinheit für eine Bogendruckmaschine - Google Patents

Bogen-Wendeeinheit für eine Bogendruckmaschine Download PDF

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Publication number
EP0278992B1
EP0278992B1 EP87102145A EP87102145A EP0278992B1 EP 0278992 B1 EP0278992 B1 EP 0278992B1 EP 87102145 A EP87102145 A EP 87102145A EP 87102145 A EP87102145 A EP 87102145A EP 0278992 B1 EP0278992 B1 EP 0278992B1
Authority
EP
European Patent Office
Prior art keywords
reversing
cam
sheet
gripper
cylinder
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
Application number
EP87102145A
Other languages
English (en)
French (fr)
Other versions
EP0278992B2 (de
EP0278992A1 (de
Inventor
Kenji C/O Toride Factory Kida
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.)
Komori Corp
Original Assignee
Komori Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8196757&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0278992(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Komori Corp filed Critical Komori Corp
Priority to DE8787102145T priority Critical patent/DE3762956D1/de
Priority to AT87102145T priority patent/ATE53187T1/de
Priority to EP87102145A priority patent/EP0278992B2/de
Publication of EP0278992A1 publication Critical patent/EP0278992A1/de
Priority to US07/380,725 priority patent/US4928586A/en
Publication of EP0278992B1 publication Critical patent/EP0278992B1/de
Application granted granted Critical
Publication of EP0278992B2 publication Critical patent/EP0278992B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B41F21/108—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine with pneumatic means

Definitions

  • the present invention relates to a sheet reversing unit for reversing a sheet between printing units for two-side printing.
  • a printing press which can be selectively used for both single-side printing and two-side printing has been commercially available to satisfy various needs in printing.
  • a printing press of this type (see f.i. US-A 4 448 125) has a sheet reversing unit for reversing a sheet whose one surface has already been printed and then conveying it to the next printing unit for two-side printing.
  • Two printing units 1 and 2 of the printing press comprise rubber blanket cylinder 3 each of which is in contact with a corresponding plate cylinder (not shown), and impression cylinders 4 and 5 each of which is in contact with the corresponding rubber blanket cylinder 3 and has a diameter twice that of the cylinder 3.
  • Gripper devices 6 and 7 (to be referred to simply as grippers 6 and 7 hereinafter) each consisting of a gripper and a gripper pad are arranged in notches which are formed at a position that equally divides the outer peripheries of the impression cylinders 4 and 5.
  • a reversing cylinder 8 is disposed between the two impression cylinders 4 and 5 so that their peripheral surfaces are brought into contact with each other.
  • a reversing device 11 consisting of a reversing gripper 9 and a suction lever 10 is arranged in a notch formed at a position that equally divides the outer periphery of the reversing cylinder 8.
  • Reference numeral 12 denotes a feeder board for stopping a sheet 13 fed from the sheet feeder and registering the sheet end.
  • Reference numeral 14 denotes a swing device for gripping the sheet 13 on the feeder board 12 to be re-gripped by the gripper 6 of the impression cylinder 4.
  • the sheet 13 gripped by the gripper 6 of the impression cylinder 4 is conveyed while being wound around the peripheral surface of the impression cylinder 4 upon rotation of the impression cylinder 4 in the direction indicated by the arrow in Fig. 3.
  • an image transferred from the plate cylinder to the rubber blanket cylinder 3 is transferred to a front surface of the sheet 13, thus performing surface printing.
  • the gripper 6 gripping the sheet 13 has passed the contact point between the two cylinders 4 and 8 and the sheet end of the sheet 13 reaches the contact point between the cylinders 4 and 8, as shown in Fig.
  • Fig. 3(c) illustrates a state wherein the respective cylinders have been rotated through about 30 ° from the re- gripping operation.
  • the sheet 13 gripped by the reversing gripper 9 is about to be wound around the reversing cylinder 8 as was wound around the impression cylinder 4 so that its non-printing surface faces .the peripheral surface of the reversing cylinder 8.
  • Reference numerals 13A and 13B denote pro- ceding sheets; and 13C and 13D, following sheets.
  • the gripped end of the sheet 13 wound around the reversing cylinder 8 reaches the contact point between the cylinders 8 and 5 upon rotation of the respective cylinders like the sheet 13B, and the sheet 13 is re-gripped from the reversing gripper 9 to the gripper 7.
  • the sheet 13 is reversed so that the printed surface faces the peripheral surface of the impression cylinder 5.
  • the sheet 13 is then wound around the impression cylinder 5.
  • the printing operation is performed as in the printing unit 1. In this case, since the sheet 13 is reversed, an image is printed on its back surface.
  • Fig. 4 is an enlarged side view of the reversing unit which has passed the contact point with the impression cylinder 5 and is rotated toward the contact point with the impression cylinder 4
  • Fig. 5 is an enlarged side view of the reversing unit at the contact point with the impression cylinder 4.
  • a gripper shaft 15 and a hollow suction lever shaft 16 are axially suspended in the notch of the outer peripheral portion of the reversing cylinder 8 and parallel to a cylinder shaft.
  • the reversing gripper 9 comprises a gripper holder 17 fixed to the gripper shaft 15 and a pivotal gripper pad holder 18.
  • a gripper 20 for gripping the sheet 13 between itself and a gripper pad 19 fixed to the distal end portion of the gripper pad holder 18 is pivotally mounted on the distal end portion of the gripper pad holder 18.
  • Reference numeral 21 denotes a gripper spring for biasing the gripper pad holder 18 in the closing direction of the gripper 19; and 22, a gripper spring for applying a gripping pressure to the gripper 19.
  • the reversing gripper 9 with the above arrangement is pivoted between positions shown in Figs. 4 and 5 together with the gripper shaft 15 which is reciprocated by the cam mechanism.
  • a roller lever which is swung by the cam mechanism on the frame side (not shown) is fixed to one end of the gripper shaft 15, so as to open and close the gripper 20 at the position shown in Fig. 5.
  • the suction lever 10 comprises an L-shaped lever 23 which is fixed to the suction lever shaft 16 at a phase different from that of the reversing gripper 9 in the axial direction, and a suction port 24 mounted on one free end portion.
  • the suction port 24 is connected to a suction air source through a hollow portion of the suction lever shaft 16, a rotary valve, and the like.
  • the suction lever 10 is pivoted, between the positions shown in Figs. 4 and 5, together with the suction lever shaft 16 which is reciprocated by the cam mechanism.
  • a stopper 25 projecting from the lever 23 is formed to have the same phase as that of the gripper pad holder 18 in the axial direction.
  • the suction lever 10 is again returned to the position shown in Fig. 4, causes the sheet end to be drawn by the suction port 24, and is then pivoted counterclockwise to provide the state shown in Fig. 5.
  • the gripper shaft 15 is oscillated through a predetermined angle by another cam for opening and closing the gripper, and only the gripper holder 17 is opened and closed, thereby gripping the sheet end between the gripper 20 and the gripper pad 19.
  • a cam follower of the cam mechanism for driving them is moved along a downwardly inclined surface from a large-diameter portion to a small-diameter portion of the cam surface, and the cam follower is urged against the cam surface by the biasing force of a spring member.
  • the suction lever 10 which is pivoted after the reversing gripper 9 catches up with the reversing gripper 9, and the stopper 25 interferes with the tail portion of the gripper pad holder 18, so that the tail portion or its surrounding parts may be damaged.
  • this phenomenon may often occur when the printing mode is switched from the single-side printing mode to the two-side printing mode for long periods and high-speed printing is performed, resulting in poor reliability.
  • a reversing cylinder 8 is axially supported by right and left frames 30 of the printing press.
  • a gripper shaft 15 is supported by two bearers 8b to be axially suspended in an outer peripheral notch 8a of the reversing cylinder 8.
  • a reversing gripper 9 consisting of a gripper holder 17 whose shaft is fixed and a pivotal gripper base holder 18 is axially mounted on the gripper shaft 15.
  • a gear shaft 31 which receives a clockwise pivotal force in Fig.
  • Reference numeral 34 denotes a reversing cam which is fixed to the frames 30 adjacent to the contact portion between the reversing cylinder 8 and an impression cylinder 4.
  • the reversing cam 34 has small- and large-diameter portions concentrical with the reversing cylinder 8 and a cam surface consisting of upwardly and downwardly inclined surfaces therebetween.
  • a cam follower 35 which is pivotally mounted on the segment gear 33 is urged against the cam surface by the biasing force of the torsion bar.
  • the reversing gripper 9 When the reversing cylinder 8 is rotated and the cam follower 35 is brought into contact with the small-diameter portion of the reversing cam 34, the reversing gripper 9 is located at a position indicated on the upper portion of the reversing cylinder 8 in Fig. 1 (a position described with reference to Fig. 4). When the cam follower 35 is moved along the upwardly inclined surface and is brought into contact with the large-diameter portion, the reversing gripper 9 is pivoted and is located at a position shown in the right side portion of the reversing cylinder 8 in Fig. 1 (a position described with reference to Fig. 5).
  • a suction lever shaft 16 is axially suspended in the notch 8a of the reversing cylinder 8 to be parallel to the gripper shaft 15.
  • the suction lever 10 is axially mounted on the shaft 16.
  • a gear shaft 36 to which a clockwise pivotal force in Fig. 1 is applied by a torsion bar (not shown) is axially supported between the bearers 8b of the reversing cylinder 8.
  • a segment gear 38 which meshes with a pinion 37 on the suction lever shaft 16 is fixed to the gear shaft 36.
  • Reference numeral 39 denotes a suction lever cam which is fixed to the frames 30 that are adjacent to the contact portion between the reversing cylinder 8 and the impression cylinder 4.
  • the cam 39 has small- and large-diameter portions concentrical with the reversing cylinder 8 and a cam surface consisting of upwardly and downwardly inclined surfaces therebetween.
  • a cam follower 40 which is pivotally mounted on the segment gear 38 is urged against the cam surface by the biasing force of the torsion bar.
  • a cam lever 41 is axially mounted on the projection of the gripper shaft 15 on the side of the pinion 32, and a gripper opening/closing cam 42 as an arcuated partial cam is formed on the frame 30 on this side to be concentrical with the impression cylinder 4, and is fixed in position to have the contact position between the cylinders 4 and 8 as its center.
  • a cam follower 43 which is pivotally mounted on the cam lever 41 is brought into contact with the gripper opening/closing cam 42. During the contact, when the cam follower 43 goes beyond the projecting portion of the gripper opening/closing cam 42, the gripper 20 is opened and closed. After the gripper 20 is closed by means of the cam 42, since the cam follower 43 is separated from the cam 42, the cam lever 41 swings upon pivotal movement of the gripper shaft 15 by means of the reversing cam 34.
  • the cam follower 43 pivotally mounted on the cam lever 41 which swings upon pivotal movement of the gripper shaft 15 travels as shown in Fig. 1. More specifically, as described above, the reversing gripper 9 which has passed the opposing position with the impression cylinder 4 is pivoted counterclockwise together with the gripper shaft 15 since the cam follower 35 is moved along the downwardly inclined surface of the reversing cam 34, and the cam lever 41 integral with the gripper shaft 15 swings. Then, these movements are synthesized with the peripheral movement of the gripper shaft 15 upon rotation of the reversing cylinder 8, and the cam follower 43 is moved along a V-shaped path.
  • a regulating cam 44 for preventing the cam follower 43 from falling outside the normal travel path is fixed to the frame 30 at a position outside the travel path of the cam follower 43. More specifically, the regulating cam 44 comprises a cam surface 44a which contacts with the cam follower 43 to have a very small gap therebetween. Even if the cam follower 35 that moves along the downwardly inclined surface of the reversing cam 34 remains floating from the cam surface due to its inertia, since the pivotal movement of the gripper shaft 15 is regulated by the cam follower 43 held in contact with the regulating cam 44, the reversing gripper 9 is accurately moved along the cam surface of the reversing cam 34, and the pivotal timing will not be delayed.
  • the cam follower 40 then goes beyond the projecting portion of the suction lever cam 39, so that the suction lever 10 is swingably pivoted, thereby drawing the sheet end of the sheet 13 to move it to the sheet gripping position.
  • the reversing gripper unit indicated by reference numeral 11A in Fig. 1 represents this state.
  • the cam follower 43 enters the gripper opening/closing cam 42 and passes its large-diameter portion, and then the gripper 20 is opened and closed to grip the sheet end.
  • the cam follower 35 is moved to the small-diameter portion of the reversing cam 34, and the reversing gripper 9 is pivoted counterclockwise.
  • the cam follower 40 is moved to the large-diameter portion of the suction lever cam 39, and the suction lever 10 is pivoted slightly later than the reversing gripper 9.
  • the cam follower 35 is moved along the downwardly inclined surface of the reversing cam 34, so that the cam follower 35 tends to float from the cam surface due to its inertia during high-speed rotation.
  • the cam follower 43 separated from the gripper opening/closing cam 42 is moved while being in contact with the cam surface of the regulating cam 44, the pivotal movement of the gripper shaft 15 is regulated, and the cam follower 35 is moved while being urged against the cam surface without floating.
  • the reversing gripper 9 and the suction lever 10 are moved to prevent interference between the stopper 25 and gripper base holder 18.
  • the cam follower 35 since the cam follower 35 is moved along the upwardly inclined surface of the reversing cam 34, the cam follower 35 does not float from the cam surface, and there is no fear of interference between the stopper 25 and the gripper base holder 18.
  • a cam lever which is brought into contact with a cam surface of a cam mechanism for opening/closing a gripper of a reversing gripper device is fixed to a pivot shaft to which the reversing gripper device is fixed.
  • a regulating cam having a cam surface which contacts a cam follower so as not to fall outside a normal moving path is provided outside the moving path of the cam follower which is pivoted together with the pivot shaft after a sheet is gripped.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Ink Jet (AREA)
  • Stringed Musical Instruments (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Claims (2)

1. Bogen-Wendeeinheit (11) für eine Bogendruckmaschine, welche im Bereich des Wendezylinders (8) zwischen zwei Gegendruckzylindern (4, 5) angeordnet ist,
- bestehend aus einem von einem ersten Nockenmechanismus (39, 40) aktivierten Saugelement (10), mit welchem das rückwärtige Ende eines von beiden Seiten her bedruckten Papierblattes dient, sobald dasselbe die Kontaktstelle des vorangegangenen Zylinders (4) erreicht,
- sowie einem in der Nähe des Saugelementes (10) angeordneten, von einem zweiten Nockenmechanismus (42, 43) aktivierten Wendegreifelement (9) zum Erfassen des rückwärtigen Endes eines von dem Saugelement (10) erfaßten Papierblatt (13),
wobei das Wendegreifelement (9) durch einen dritten Nockenmechanismus (34, 35) gesteuert ist, mit welchem das Wendegreifelement (9) verschwenkt wird und das erfaßte rückwärtige Ende des Papierblattes (13) als neues vorderes Ende dem folgenden Zylinder (5) transferiert wird, dadurch gekennzeichnet, daß ein weiteres Nockenelement (44) mit einer Steuerfläche (44a) vorgesehen ist, welches während der Rotation des Wendegreifers (9) den Nockenfolger (43) derart berührt, daß kein Abheben des Nockenfolgers (43) von dem vorgegebenen Pfad während Druckvorgängen mit hoher Geschwindigkeit aufgrund von Trägheit zustande kommt.
2. Bogen-Wendeeinheit nach Anspruch 1, dadurch gekennzeichnet, daß das weitere Nockenelement (44) mit seiner Steuerfläche (44a) stationär an dem Rahmen (30) der Bogendruckmaschine befestigt ist.
EP87102145A 1987-02-16 1987-02-16 Bogen-Wendeeinheit für eine Bogendruckmaschine Expired - Lifetime EP0278992B2 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8787102145T DE3762956D1 (de) 1987-02-16 1987-02-16 Bogen-wendeeinheit fuer eine bogendruckmaschine.
AT87102145T ATE53187T1 (de) 1987-02-16 1987-02-16 Bogen-wendeeinheit fuer eine bogendruckmaschine.
EP87102145A EP0278992B2 (de) 1987-02-16 1987-02-16 Bogen-Wendeeinheit für eine Bogendruckmaschine
US07/380,725 US4928586A (en) 1987-02-16 1989-07-13 Sheet reversing unit for sheet printing press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87102145A EP0278992B2 (de) 1987-02-16 1987-02-16 Bogen-Wendeeinheit für eine Bogendruckmaschine

Publications (3)

Publication Number Publication Date
EP0278992A1 EP0278992A1 (de) 1988-08-24
EP0278992B1 true EP0278992B1 (de) 1990-05-30
EP0278992B2 EP0278992B2 (de) 1994-01-19

Family

ID=8196757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102145A Expired - Lifetime EP0278992B2 (de) 1987-02-16 1987-02-16 Bogen-Wendeeinheit für eine Bogendruckmaschine

Country Status (3)

Country Link
EP (1) EP0278992B2 (de)
AT (1) ATE53187T1 (de)
DE (1) DE3762956D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4012497A1 (de) * 1990-04-19 1991-10-24 Roland Man Druckmasch Saugersteuerung in bogenuebergabetrommeln in mehrfarben-bogendruckmaschinen
DE4118584C2 (de) * 1991-06-06 1994-03-24 Kba Planeta Ag Greifersystem an Bogenführungszylindern von Druckmaschinen
DE4118585C1 (en) * 1991-06-06 1992-10-29 Kba-Planeta Ag, O-8122 Radebeul, De Sheet holder for rotary printing press - uses successive sets of suction discs to pass sheet from one cylinder to another
CN103434267B (zh) * 2013-09-12 2015-05-13 上海光华印刷机械有限公司 一种胶印机的递纸牙机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005981B (de) * 1955-03-21 1957-04-11 Roland Offsetmaschf Greifervorrichtung fuer Bogen verarbeitende Maschinen, insbesondere Druckmaschinen
US3443808A (en) 1967-05-05 1969-05-13 Miller Printing Machinery Co Sheet gripper mechanism
US3742847A (en) * 1970-11-27 1973-07-03 Polygraph Leipzig Kom Veb Sheet turning mechanism for perfectors

Also Published As

Publication number Publication date
EP0278992B2 (de) 1994-01-19
ATE53187T1 (de) 1990-06-15
EP0278992A1 (de) 1988-08-24
DE3762956D1 (de) 1990-07-05

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