EP0261412B1 - Pince pour machines rotatives à feuilles - Google Patents

Pince pour machines rotatives à feuilles Download PDF

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Publication number
EP0261412B1
EP0261412B1 EP87112207A EP87112207A EP0261412B1 EP 0261412 B1 EP0261412 B1 EP 0261412B1 EP 87112207 A EP87112207 A EP 87112207A EP 87112207 A EP87112207 A EP 87112207A EP 0261412 B1 EP0261412 B1 EP 0261412B1
Authority
EP
European Patent Office
Prior art keywords
gripper
finger
clamping
sheet
spring
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
EP87112207A
Other languages
German (de)
English (en)
Other versions
EP0261412A3 (en
EP0261412A2 (fr
Inventor
Rudolf Raab
Manfred Herold
Peter Hummel
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT87112207T priority Critical patent/ATE74064T1/de
Publication of EP0261412A2 publication Critical patent/EP0261412A2/fr
Publication of EP0261412A3 publication Critical patent/EP0261412A3/de
Application granted granted Critical
Publication of EP0261412B1 publication Critical patent/EP0261412B1/fr
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
    • B41F21/104—Gripper details
    • 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
    • B41F21/04—Grippers

Definitions

  • the invention relates to a clamping gripper for sheet-fed rotary printing machines according to the preamble of the first claim.
  • a clamp gripper of the type mentioned is known from DE-PS 488 949.
  • the disadvantage is that the hook-shaped gripper finger between the cylinder wall and a guide bar is only loose, i.e. is not performed without play. At high machine speeds, only a few milliseconds are available for opening the grippers and there are sudden loads that lead to vibration of the machine and unclean pressure. Vibrations of the gripper shaft have an effect on this gripper both perpendicular to the direction of sheet travel and horizontally, so that it is not possible to transfer the sheet in the correct position.
  • DD-PS 66 634 From DD-PS 66 634 it is known to support a one-piece gripper lever on a gripper shaft and to adjust its pretensioning force by means of two compression springs.
  • the disadvantage is that the gripper lever loses its statically determined position if the most possible possible compensation of the bearing force is to be achieved. At very high machine speeds, insufficient centering, e.g. possible due to disturbing vibrations that are introduced into the machine.
  • Another disadvantage is the relatively large radius of inertia and the mass of the vibrating parts for initiating the holding process.
  • a gripper is known in which the axis of the gripper finger joint is pivotally mounted in a rotary joint parallel to the gripper shaft, the axis of the gripper finger joint being approximately on the gripper tip Groundbreaking extension of a straight line is located, which connects the support surface for the gripper tip with the axis of the gripper shaft.
  • the geometry shown in FIG. 1 shows that the force exerted by the gripper tip on the gripper support continues to have a component in the direction of sheet travel. As a result, there is still a risk of the arc shifting, as well as a possible torsion of the gripper shaft under high pretensioning forces, although an improvement over conventional grippers with a circular movement about the gripper shaft axis can be achieved.
  • a vertically closing gripper with a controlled gripper shaft is known from DE-PS 2 030 040.
  • a disadvantage is the frictional control of the gripper shaft relative to the pivot point of a control lever by means of a guide on a control cam. The additional control effort leads to an increase in the inertial forces of the system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.
  • a resilient clamping gripper which executes a vertical closing movement in a second movement phase regardless of the presence of a soft gripper pad.
  • the beginning of the last movement phase must be adjusted by fine adjustment of the gripper tip to the holding surface of the gripper bar.
  • the spring force of two springs must be precisely matched to one another in order to avoid jerky movements during the opening and closing movements of the gripper.
  • the object of the invention is to further develop a clamping gripper of the type mentioned in such a way that a seamless transition from a play-free rotating movement phase to a play-free movement phase of the hook-shaped gripper finger perpendicular to the gripper pad is made possible.
  • the advantage of the solution according to the invention is, in particular, that vibrations of the gripper shaft can only act vertically and no longer horizontally, the holding surface of the gripper not needing to be made of elastic material and a fine adjustment of springs is unnecessary.
  • the hook-shaped gripper finger has a seamless, play-free transition from the first movement phase to the last movement phase, without causing the gripper tip to be pushed.
  • Clamping grippers of this type are particularly suitable for achieving high holding forces between gripper tips and curved gripper pads made of hard structured materials, e.g. Titanium carbides, which can no longer wear out as quickly as with the known clamp grippers due to the grinding effect of the paper.
  • Fig. 1 the linear movement of a hook-shaped gripper finger 2 is shown schematically in all its phases of movement.
  • the hook-shaped gripper finger 2 is articulated in the clamping piece 1, 14 with its lower end by means of a driving pin 6 and is connected to one at the upper end of the hook-shaped gripper finger 2 arranged compression spring 7 pressed via rollers 5 and 10 on a gripper bar 4.
  • the compression spring 7 assumes both the function of the gripper impact force and the function of the contact pressure of the rollers 5, 10 on the gripper impact bar 4.
  • the roller 10 is supported on an oblique curve part 12 on the gripper impact bar 4, which is seamless in a straight guide 11 perpendicular to Holding surface 13 of the gripper bar 4 passes.
  • both rollers 5, 10 are supported on the straight guide 11 without play, so that pushing of the gripper tip 9 is avoided during the opening and closing process, regardless of whether a soft gripper pad is present.
  • the gripper shaft 3 is rotated, the hook-shaped gripper finger 2 first moves perpendicularly to the holding surface 13 of the gripper bar 4 through the driving pin 6.
  • the upper roller 10 reaches the oblique curve part 12 on the gripper bar 4, the swiveling of the gripper begins in order to be able to dive in or away from the paper edge.
  • the gripper closes without any vibrations having an effect in the direction of sheet travel A fine adjustment of the gripper tip 9 to the holding surface 13 of the gripper bar 4 is not necessary, for example on different gripping surfaces at the edge of the sheet or sheet thickness.
  • the clamping gripper shown in FIGS. 2 and 3 has an additional spring 8, which is arranged between the clamping piece 1 and the lower end of the hook-shaped gripper finger 2 and whose line of action lies on a straight line which passes through the center of the gripper shaft 3, the driving pin 6 and the roller 5 runs at the lower end of the hook-shaped gripper finger 2.
  • This second spring 8 The influence of the bearing force on the driving pin 6 can be compensated for by this second spring 8.
  • the clamping gripper is particularly suitable for pairings of holding surfaces on the sheet gripper pad 4 and on the gripper tip 9, which are made of very hard structured material. A wear of these holding surfaces by the abrasive paper can no longer take place, so that their positive locking takes place without wear over a longer service life. Since no settings are required, the clamp gripper is also easy to service. Since the hook - shaped gripper finger 2 is spring loaded on the clamping piece 1 and not on the gripper shaft and is cam - controlled without play, it has only a low tendency to maintenance, since the rotating parts, the rollers 5 and 10 and the bearing points on the gripper finger 2 or hardly any wear occurs on the guide surfaces on the gripper bar 4.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Advancing Webs (AREA)

Claims (3)

  1. Corps de pinces destinées aux machines rotatives pour l'impression des feuilles se composant d'une partie fixe (1) solidaire d'un arbre de pinces (3) et d'un embout de pince (2) en forme de crochet dont la partie inférieure est articulée sur la partie fixe (1) et la partie supérieure de l'embout (9) mobile verticalement par rapport au siège de la pince (14), dans un chemin de roulement (11,12) ménagé sur une des parois,
    caractérisé par le fait
    qu'aux deux extrémités de l'embout en forme de crochet (2) sont placés des galets d'appui (5) (10) qui, par l'intermédiaire d'un ressort de pression (7) logé dans la partie fixe (1) s'appuient sur un chemin de roulement formé par le corps de la barre support des sièges de pinces (4), ce chemin de roulement formant dans sa partie (12) un appui pour l'ouverture de l'embout de pince en forme de crochet (2) et dans la partie inférieure de cette barre support des sièges qui est utilisée pour sa fixation, le chemin de roulement (13) devient un guide vertical (11).
  2. Corps de pince suivant la revendication no.1
    caractérisé par le fait que la droite d'action de la force du ressort (7) est presque parallèle à la partie incurvée du chemin de roulement (12) de la barre support des sièges des pinces (4) et par le fait que la tension du ressort (7) est réglable.
  3. Corps de pince suivant la revendication nos. 1 et 2
    caractérisé par le fait qu'entre la partie fixe (1) et l'embout de pince en forme de crochet (2) est placé un deuxième ressort (8) dont la droite d'action de la force passe par l'axe de l'arbre des pinces (3), l'axe de l'articulation de l'embout de pince en forme de crochet (6) et par le galet (5) placé à la partie inférieure de l'embout de pince en forme de crochet.
EP87112207A 1986-09-26 1987-08-22 Pince pour machines rotatives à feuilles Expired - Lifetime EP0261412B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112207T ATE74064T1 (de) 1986-09-26 1987-08-22 Klemmgreifer fuer bogenrotationsdruckmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863632769 DE3632769A1 (de) 1986-09-26 1986-09-26 Klemmgreifer fuer bogenrotationsdruckmaschinen
DE3632769 1986-09-26

Publications (3)

Publication Number Publication Date
EP0261412A2 EP0261412A2 (fr) 1988-03-30
EP0261412A3 EP0261412A3 (en) 1990-01-31
EP0261412B1 true EP0261412B1 (fr) 1992-03-25

Family

ID=6310436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112207A Expired - Lifetime EP0261412B1 (fr) 1986-09-26 1987-08-22 Pince pour machines rotatives à feuilles

Country Status (5)

Country Link
US (1) US4813353A (fr)
EP (1) EP0261412B1 (fr)
JP (1) JPS6394846A (fr)
AT (1) ATE74064T1 (fr)
DE (2) DE3632769A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919088A1 (de) * 1989-06-10 1990-12-13 Roland Man Druckmasch Bogengreifer fuer bogenverarbeitende maschinen
KR910008218B1 (ko) * 1989-11-30 1991-10-12 삼성전자 주식회사 비디오 프린터의 칼라 기록장치
DE4026237C1 (fr) * 1990-08-18 1992-02-06 Man Miller Druckmaschinen Gmbh, 6222 Geisenheim, De
DE4214191A1 (de) * 1992-04-30 1993-11-04 Roland Man Druckmasch Greifer fuer bogendruckmaschinen
DE4317429C2 (de) * 1993-05-26 2001-06-13 Heidelberger Druckmasch Ag Vorrichtung zur drehfesten im Phasenwinkel stufenlos einstellbaren Befestigung eines Greiferanschlages
FR2744708B1 (fr) * 1996-02-09 1998-04-30 Heidelberg Harris Sa Butee deplacable disposee sur des cylindres de machines rotatives a imprimer sur lesquels passent les produits
DE19613963C2 (de) * 1996-04-09 1999-03-04 Heidelberger Druckmasch Ag Vorrichtung zum Ablösen eines Bogens von einem Gummizylinder einer Druckmaschine
DE10336715A1 (de) 2002-09-06 2004-03-18 Heidelberger Druckmaschinen Ag Greifereinrichtung in einer bogenverarbeitenden Maschine
DE10335230A1 (de) * 2003-08-01 2005-02-17 Man Roland Druckmaschinen Ag Verfahren zur Herstellung von RFID Etiketten
CN102555439A (zh) * 2012-01-12 2012-07-11 天津长荣印刷设备股份有限公司 一种带滚轮的牙排装置及其工作方法
JP5880146B2 (ja) * 2012-03-05 2016-03-08 富士ゼロックス株式会社 転写装置、画像形成装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE66634C (de) * A. ALBISSER in Obersulz, Elsafs Maschine zum Schleifen von Krempeldeckelbeschlägen
DE67992C (de) * R. RÖDER in Heidelberg, Kl. Mantelgasse 1 Verstellbares Winkelmaafs
DD66634A (fr) *
DD67992A (fr) *
DE488949C (de) * 1930-01-11 Albert Schnellpressen Senkrecht zu der Greiferunterlage bewegliche Zylindergreifer
DE974955C (de) * 1951-08-09 1961-06-15 Gerhard Ritzerfeld Vorrichtung zum Einspannen von Druckformen bei Rotationsvervielfaeltigern
DE1908181A1 (de) * 1969-02-19 1970-11-05 Roland Offsetmaschf Klemmgreifer fuer Bogenrotationsdruckmaschinen
US3606308A (en) * 1969-06-20 1971-09-20 Miller Printing Machinery Co Sheet gripping device
US3637202A (en) * 1970-05-14 1972-01-25 Miller Printing Machinery Co Sheet-gripping device
SU765024A1 (ru) * 1975-05-08 1980-09-23 Специальное Конструкторское Бюро Пишущих Машин "Союзоргтехника" Министерства Приборостроения, Средств Автоматизации И Систем Управления Устройство дл креплени гибких печатных форм на формном цилиндре
DD148619A1 (de) * 1980-01-21 1981-06-03 Guenter Weisbach Einrichtung zur steuerung von anlegmarken in druckmaschinen
DD154083A1 (de) * 1980-11-17 1982-02-24 Arndt Jentzsch Bogengreifereinrichtung
DE3049067C2 (de) * 1980-12-24 1982-12-16 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Greifeinrichtung am Druckzylinder für Bogenrotations-Tiefdruckmaschinen
DE3112964A1 (de) * 1981-04-01 1982-10-21 Heidelberger Druckmaschinen Ag, 6900 Heidelberg "bogenuebertragungszylinder von bogenrotationsdruckmaschinen mit einer einrichtung zur passerkorrektur der aufdrucke"
JPS5814191A (ja) * 1981-07-17 1983-01-26 ヤマハ株式会社 変調効果装置
DE3333050A1 (de) * 1983-09-14 1985-03-28 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorgreiferantrieb
DD223118A1 (de) * 1983-12-12 1985-06-05 Polygraph Leipzig Bogenfuehrungseinrichtung
DE3445886A1 (de) * 1984-12-15 1986-06-26 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Greifervorrichtung fuer eine druckmaschine
DE3529639A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen
JPH116546A (ja) * 1997-06-17 1999-01-12 Mitsuboshi Belting Ltd Ｖリブドベルトを用いた多軸駆動装置

Also Published As

Publication number Publication date
EP0261412A3 (en) 1990-01-31
JPS6394846A (ja) 1988-04-25
DE3777733D1 (de) 1992-04-30
DE3632769A1 (de) 1988-04-07
EP0261412A2 (fr) 1988-03-30
ATE74064T1 (de) 1992-04-15
US4813353A (en) 1989-03-21
DE3632769C2 (fr) 1988-09-15

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