EP0603343B1 - Procede et appareil de positionnement d'un produit en feuille sur une table de support pour y percer des trous par poin onnage - Google Patents

Procede et appareil de positionnement d'un produit en feuille sur une table de support pour y percer des trous par poin onnage Download PDF

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Publication number
EP0603343B1
EP0603343B1 EP92925489A EP92925489A EP0603343B1 EP 0603343 B1 EP0603343 B1 EP 0603343B1 EP 92925489 A EP92925489 A EP 92925489A EP 92925489 A EP92925489 A EP 92925489A EP 0603343 B1 EP0603343 B1 EP 0603343B1
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EP
European Patent Office
Prior art keywords
punching
sheet
adjustment
vacuum
plane
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
EP92925489A
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German (de)
English (en)
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EP0603343A1 (fr
Inventor
Johnny Persson
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Individual
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Individual
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Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/015—Means for holding or positioning work for sheet material or piles of sheets

Definitions

  • the invention relates to method and apparatus för punching register holes in sheet material, this term as used herein relating not only to paper sheets but also to plastics sheets, photographic plates, metal sheets, film and the like used in the graphic industry. Henceforth reference will be made to sheet when sheet material of said kinds is referred to.
  • the register holes are used for exact positioning of sheets in a predetermined position when sheets are handled for treatment or use thereof in different ways in lithographic processes. For example, positioning of photographic plates, masks and films in making printing plates for offset printing may be concerned. It is a necessary pre-requisit in order to obtain finally a satisfactory result, for example good register of the colours of a product of multi-colour printing, that the punched register holes are located in an exact predetermined position on the sheet.
  • US-A-4 280 182 describes a method and an apparatus for punching holes in sheets whereby a sheet is taken from a picking magazine and is located on a table arranged substantially in the same plane as a punching table, and this sheet is attached to the table, the table and thus the sheet is positioned by adjusting the table for movement along a single axis, the head assembly and the press ram being also movable in mutually perpendicular directions in the plane of the punching table and rotation of the table about an axis perpendicular to said plane, the positioning being controlled by a microprocessor, and the sheet is punched and the punched sheet after having been released from the table is removed from the punching table.
  • the press ram is reciprocated along a vertical axis, while the table is slidably supported for movement along another axis and the head assembly is movable along an axis perpendicularly to the axis of the table.
  • the table is slidably supported for movement along another axis and the head assembly is movable along an axis perpendicularly to the axis of the table.
  • three different elements are moved for adjustement along three axes. Furthermore, no adjustment marks are provided on the sheet material and consequently no sensing of these adjustement marks is provided according to this document.
  • the object of the invention is to replace the manual operation by an automatic operation which with an accuracy unsurpassed so far provides positioning of the sheet in the intended position before punching.
  • the apparatus shown in FIGS. 1 and 2 comprises a frame 10 having three separate sections, viz. a picking magazine 11, a punching table 12, and a finished product magazine 13.
  • the picking magazine 11 has guides 14 which may be adjustable for adjustment to different sheet sizes, and in FIG. 1 there is indicated by dot-and-dash lines 15 a sheet pile in this magazine.
  • the finished product magazine 13 has in a corresponding way guides 16, and the sheet pile in this magazine is indicated by dot-and-dash lines 17.
  • Two guides 21 are supported by means of flanges 18, 19 and 20 projecting from the frame 10, said guides extending along the frame over the punching table 12 and the finished magazine 13 and over the portion of the picking magazine 11, which is next to the punching table 12.
  • Two suction ramps 22 and 23 are displaceably guided on the guides 21 and are connected to linear drive means 24, e.g. a double acting pneumatic ram, to be driven by said means along the guides, fixedly spaced from each other.
  • the suction ramps can be displaced by the drive means 24 from the left end position shown in FIGS.
  • suction ramp 22 is located over the sheet pile 15 at the right end thereof and the suction ramp 23 is located over a vacuum table 25 at the same level as the puching table 12, at the right end thereof, to a left end position wherein the suction ramp 22 has been displaced to the position where the suction ramp 23 is located in FIG. 1, and the suction ramp 23 has been displaced to the finished product magazine 13 where it is located over the pile 17 at the right end thereof the suction ramp being indicated by dot-and-dash lines 23' in said position.
  • suction ramps can be displaced between these end positions in order that the suction ramp 22 will grip the uppermost sheet of the pile 15 and will pull said sheet onto the punching table 12 and will position the sheet over the vacuum table 25 as indicated by dot-and-dash lines 15'.
  • the sheet indicated on the punching table 12 will be gripped by the suction ramp 23 and will be pulled into the finished product magazine 13 to be deposited therein to form together with other sheets transferred to the finished product magazine the pile 17 which thus will comprise punched sheets.
  • pressure rollers 26 are mounted in a conventional way in this magazine.
  • the vacuum table 25 can be of a conventional construction and is constructed to attach a sheet against the plane surface thereof when the vacuum table is put under vacuum, i.e. activated.
  • the vacuum table is made adjustable in the punching table 12 so as to be displaced in the directions X and Y indicated by double arrows in FIG. 4, and to be rotated in the direction Z indicated by a double arrow. Said adjustment of the vacuum table can be effected by electric step motors which provide the greatest accuracy in the positioning of the vacuum table.
  • the punching table 12 there is provided adjacent the vacuum table at the longitudinal edges thereof four punch assemblies 27 of conventional type.
  • the punching table there are also provided two cameras with the objectives thereof directed downwards towards the punching table, and these cameras form sensors for sensing the position of the sheet located on the punching table 15' by guidance of adjustment marks 29 (FIG. 5), which are found on each sheet in the picking magazine.
  • the adjustment marks can be of different types. The marks are shown here as crosses but they can comprise also dots, circles, squares or the like, or combinations thereof.
  • the cameras 28 should be connected to a microprocessor to forward to the microprocessor input signals by guidance of the adjustment marks 29, said input signals indicating the position of the sheet 15 laying on the punching table 12.
  • the microprocessor will control the drive means 24 and the step motors connected to the vacuum table 25.
  • the programming and construction of microprocessors for the performance of such control can be effected on the basis of common knowledge of the skilled man on the present state of the computer art and accordingly will not be described in more detail here.
  • the vacuum ramp 22 has positioned the sheet 15' on the punching table 12 and has returned to the left position shown in FIGS. 1 and 2.
  • the positioning of the sheet 15' is controlled from the microprocessor which stops the movement of the sheet onto the punching table 12 when the cameras 28 sense the adjustment marks 29. Then, the sheet 15' can be positioned on the punching table 12 with an accuracy of »1.0 mm, but this accuracy is not satisfactory for punching the sheet and thus a fine adjustment has to take place.
  • This fine adjustment of the position of the sheet 15' is obtained by means of the vacuum table 25 which will be activated as soon as the sheet 15' has been positioned on the punching table 12.
  • adjustment of the vacuum table 25 and thus of the sheet 15' attached to the vacuum table will be effected via the microprocessor as required in the directions X, Y and Z in order that the two adjustment marks 29 will be centered below the cameras or in relation to zero marks provided on the positioning table, the positions of the adjustment marks being sensed continuously by the cameras during the positioning by means of the step motors in the directions X, Y and Z.
  • This positioning can be performed at an accuracy of »0.01 mm, and when the positioning has been closed the punch assemblies 27 will be activated in dependence of a signal from the micro processor for punching of the sheet.
  • the sensors for sensing the adjustment marks on the sheets can comprise for example inductive, mechanical or other known types of sensors instead of cameras as shown herein.
  • the adjustment means for the vacuum table can of course comprise other means then electric step motors, e.g. hydraulic or mechanical adjustment means.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Details Of Cutting Devices (AREA)

Claims (6)

  1. Procédé pour réaliser par poinçonnage des trous de cadrage dans des feuilles (15') pourvues de repères (29) de réglage, dans lequel la feuille (15') est prise dans un magasin (11) de prélèvement et est placée sur une table à dépression (25) disposée sensiblement dans le même plan qu'une table (12) de poinçonnage, la feuille est fixée par aspiration à la table à dépression, la table à dépression et donc la feuille sont positionnées par réglage de la table à dépression dans des directions mutuellement perpendiculaires (X, Y) dans le plan de la table de poinçonnage et par une rotation (Z) de la table à dépression autour d'un axe perpendiculaire audit plan, le positionnement est commandé par un microprocesseur en fonction de la position détectée des repères de réglage, et la feuille est poinçonnée, et la feuille poinçonnée, après avoir été libérée de la table de dépression, est enlevée de la table de poinçonnage.
  2. Procédé selon la revendication 1, dans lequel la feuille (15') est déplacée linéairement du magasin de prélèvement (11) jusqu'à la table (12) de poinçonnage et de celle-ci jusqu'à un magasin (13) de produits finis.
  3. Appareil pour réaliser par poinçonnage des trous de cadrage dans des feuilles (15') pourvues de repères (29) de réglage, comportant une table (12) de poinçonnage ayant des poinçons (27) et des capteurs (28) destinés à détecter la position de la feuille sur la table de poinçonnage, comportant une table à dépression (25) montée dans la table (12) de poinçonnage sensiblement dans son plan, ladite table à dépression pouvant être réglée dans deux directions mutuellement perpendiculaires (X, Y) dans le plan de la table de poinçonnage et pouvant être tournée autour d'un axe (Z) perpendiculaire audit plan, et des moyens de réglage destinés à régler la table à dépression, reliés fonctionnellement aux capteurs pour en commander le fonctionnement par l'intermédiaire d'un microprocesseur en fonction des repères de réglage détectés par les capteurs.
  4. Appareil selon la revendication 3, dans lequel les capteurs comprennent des caméras (28) dont les objectifs sont dirigés vers la table (12) de poinçonnage pour une détection optique des repères (29) de réglage.
  5. Appareil selon la revendication 3 ou 4, dans lequel un magasin (11) de prélèvement pour des feuilles non poinçonnées et un magasin (13) de produits finis pour des feuilles poinçonnées sont prévus de part et d'autre de la table (12) de poinçonnage et des moyens (22, 23, 24) sont prévus pour déplacer de façon rectiligne les feuilles du magasin de prélèvement jusqu'à la table de poinçonnage et de celle-ci jusqu'au magasin de produits finis.
  6. Appareil selon la revendication 5, dans lequel lesdits moyens comprennent deux rampes (22, 23) d'aspiration, guidées linéairement et montées à une distance fixe l'une de l'autre.
EP92925489A 1991-09-10 1992-09-08 Procede et appareil de positionnement d'un produit en feuille sur une table de support pour y percer des trous par poin onnage Expired - Lifetime EP0603343B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9102602A SE9102602D0 (sv) 1991-09-10 1991-09-10 Saett och apparat foer stansning av registerhaal i ark
SE9102602 1991-09-10
PCT/SE1992/000632 WO1993004825A1 (fr) 1991-09-10 1992-09-08 Procede et appareil de positionnement d'un produit en feuille sur une table de support pour y percer des trous par poinçonnage

Publications (2)

Publication Number Publication Date
EP0603343A1 EP0603343A1 (fr) 1994-06-29
EP0603343B1 true EP0603343B1 (fr) 1997-03-19

Family

ID=20383671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92925489A Expired - Lifetime EP0603343B1 (fr) 1991-09-10 1992-09-08 Procede et appareil de positionnement d'un produit en feuille sur une table de support pour y percer des trous par poin onnage

Country Status (6)

Country Link
EP (1) EP0603343B1 (fr)
AT (1) ATE150352T1 (fr)
AU (1) AU2579292A (fr)
DE (2) DE69218443T2 (fr)
SE (1) SE9102602D0 (fr)
WO (1) WO1993004825A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19806579B4 (de) * 1997-10-10 2008-11-06 2B Präzisionstechnik GmbH für Druck und Industrie Verfahren und Vorrichtung zur lagegerechten Positionierung und Stanzung einer belichteten Druckplatte

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5644979A (en) * 1996-04-30 1997-07-08 Preco Industries, Inc. Die cutting and stamping press having simultaneous X, Y, and .O slashed. axes die registration mechanism and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE419711B (sv) * 1978-04-18 1981-08-24 Jung Ab Stig Skerbord for maskinell tillskerning av gardin- eller dylika mjuka och bojliga materialbanor i valda lengder
US4280182A (en) * 1979-05-14 1981-07-21 John Mickowski Microcomputer control system
GB2055666A (en) * 1979-08-10 1981-03-11 Billows L K Improvements in or relating to apparatus for positioning sheet material
GB2091155A (en) * 1981-01-21 1982-07-28 Billows Leonard Kay Improvements in or relating to apparatus for positioning sheet material
US4635365A (en) * 1983-09-09 1987-01-13 Dainippon Screen Seizo Kabushiki Kaisha Coordinate plotter with automatic punching device
US4979120A (en) * 1988-11-28 1990-12-18 The Coe Manufacturing Company Control system for automatic adjustment of lathe knife pitch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19806579B4 (de) * 1997-10-10 2008-11-06 2B Präzisionstechnik GmbH für Druck und Industrie Verfahren und Vorrichtung zur lagegerechten Positionierung und Stanzung einer belichteten Druckplatte

Also Published As

Publication number Publication date
SE9102602D0 (sv) 1991-09-10
ATE150352T1 (de) 1997-04-15
AU2579292A (en) 1993-04-05
DE603343T1 (de) 1996-10-10
DE69218443T2 (de) 1997-06-26
WO1993004825A1 (fr) 1993-03-18
DE69218443D1 (de) 1997-04-24
EP0603343A1 (fr) 1994-06-29

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