EP0158860B1 - Procédé et dispositif pour le pliage mécanique de feuilles telles que calques ou similaires - Google Patents

Procédé et dispositif pour le pliage mécanique de feuilles telles que calques ou similaires Download PDF

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Publication number
EP0158860B1
EP0158860B1 EP85103396A EP85103396A EP0158860B1 EP 0158860 B1 EP0158860 B1 EP 0158860B1 EP 85103396 A EP85103396 A EP 85103396A EP 85103396 A EP85103396 A EP 85103396A EP 0158860 B1 EP0158860 B1 EP 0158860B1
Authority
EP
European Patent Office
Prior art keywords
sheet
folding
turn
gap
adhesive
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
EP85103396A
Other languages
German (de)
English (en)
Other versions
EP0158860A1 (fr
Inventor
Herbert Kübler
Werner Schweisfurth
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.)
Meteor Siegen Apparatebau Paul Schmeck GmbH
Original Assignee
Meteor Siegen Apparatebau Paul Schmeck GmbH
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 Meteor Siegen Apparatebau Paul Schmeck GmbH filed Critical Meteor Siegen Apparatebau Paul Schmeck GmbH
Publication of EP0158860A1 publication Critical patent/EP0158860A1/fr
Application granted granted Critical
Publication of EP0158860B1 publication Critical patent/EP0158860B1/fr
Expired 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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/20—Zig-zag folders

Definitions

  • the invention relates to a method and a device for the mechanical folding of sheets such as drawing pauses or the like. Along longitudinal folds parallel to one another and an oblique fold to form an envelope at the binding edge of the sheet, the folds of the sheet being rolled out by folding rollers.
  • Drawing breaks of sizes DIN A 3, A 2, A1, AO, 2 A 0 and intermediate wild sizes are folded according to certain rules (DIN 824) so that they are filed as a package like sheets of size DIN A 4 and also unfolded when stapled can be. So that the drawing parts folded over the transverse folds are not caught by the stapling mechanism, these parts are folded out of the area of the stapling holes by means of oblique folding as a cover.
  • the invention is based on the object of proposing a method and a device which avoid these infeed errors in the envelope when the sheets are transported back and forth.
  • This object is achieved in accordance with the method aspect of the invention in such a way that the sheet with the envelope folded back along the oblique fold is led forward into a folding nip of reversing folding rollers and the envelope formed by the oblique fold is held down at least until it is along the first and second Longitudinal fold zigzag-folded section of the sheet has been placed over the envelope.
  • This measure prevents the relatively narrow envelope from opening during the further passage through the folding roller area and thereby being able to get caught in front of the folding rollers.
  • this holding down can be achieved in that the inner surfaces of the envelope are provided with one or more adhesive points before the oblique fold is produced.
  • an adhesive is used which decomposes after some time and thus loosens the bonding.
  • a recrystallization adhesive can preferably be used for this.
  • the holding down can also take place in that the envelope is interlocked with the part of the sheet underneath by means of local punchings.
  • a device for carrying out this mechanical method with two reversible folding rollers that leave an inlet gap between them and that form two folding gaps with counter-rollers or a common counterband has, according to the invention, a thin, elastic sheet in the width region of the envelope, which extends from a rest position from that of the inlet gap opposite side can be inserted into the folding gap through which the sheet first passes, and which, in addition to the sheet, can be carried along by the reversing folding roller against a restoring force through the folding gap.
  • FIG. 1 shows a simplified representation of the passage of sheets such as drawing pauses or the like through the folding roller area of a folding machine.
  • the sheet 10 to be folded is provided in a station 20 (in a manner not shown in more detail) with an oblique fold 8 and reaches the folding roller area via the roller arrangement 19.
  • a conveyor belt or a plurality of conveyor belts 3 runs over rollers and rollers 1 and 2 in order to transport the sheet 10 to be folded (or an already partially folded sheet package) under the folding rollers 4 and 5 in both directions and the desired longitudinal folds 14 (FIG. 5 , 6) for a larger sheet.
  • the envelope 6 formed by oblique folding tends to open because of the never very sharp oblique fold 8, is from leading binding edge 11 of the sheet 10 towards the outside and lies in front of the folding roller 4 during transport in the direction of the arrow 12, so that the sheet 10 is either blocked or at least the envelope 6 is rolled out again smoothly.
  • the release of this provisional bond can be facilitated by using an adhesive that decomposes after some time, preferably a recrystallization adhesive.
  • the binding edge 11 containing the filing holes 16 can be reinforced by at least in the (later) hole area applying a chemical strengthening agent, known per se, to the sheet. It is drawn into the paper layer, and if the filing holes 16 are subsequently punched out, these are less prone to tearing open.
  • the envelope 6 can also be interlocked with the part of the sheet 10 underneath by local punching (crimping) and thus held down.
  • Another solution can be that after the envelope 6 has been produced and the folding nip has passed through the folding roller 4 and the conveyor belt 3 for the first time before the direction of transport is reversed, a metal foil is placed over the envelope 6 for temporary holding down and with it (when the Sheet 10) is passed through the folding nip. 3, 3a, 3b and 3c and 4, an embodiment is shown which works with such a sheet.
  • Fig. 3 shows a top view (schematically and omitting details) the arrangement of a thin, flexible sheet 21 in that area of the working width of the folding machine in which the envelope 6 after the first passage through the folding gap between the folding roller 4 and the counter or Can raise the conveyor belt after the sheet has come to rest before reversing the folding rollers. 3 also illustrates this position of the arch 10.
  • the sheet 21 is shown in Figure 3, however, in a position which it assumes only when it has been moved with the sheet 10 into the other reversed position of the folding rollers 4, 5; then the sheet 10 with the envelope 6 is no longer in the position shown in FIG. 3 (cf. FIG. 3c).
  • the later position of the second longitudinal fold 14 is indicated by dash-dotted lines (line 28) parallel to the binding edge 11. It marks the area in which the envelope 6 is covered by the arc sections adjacent to this longitudinal fold and then no longer needs to be held down. It is clear from this that a certain area of the envelope 6 near the acute-angled approach of the oblique fold 8 at the binding edge 11 is not covered because the binding edge 11 projects by a width (of approximately 20 mm) that leaves the stitching holes 16 opposite the longitudinal folds 14, which lie above the dash-dotted line 28.
  • a lamella 26, also made of thin, flexible sheet metal, is fastened in such a way that it extends stationary through the folding gap between the folding roller 4 and the conveyor belt 3.
  • Fig. 4 shows that the lamella 26 is extended with its free end into the inlet nip 27 between the folding rollers 4, 5 and thereby partially covers the folding roller 4, the curvature of which is adjusted. This on the one hand prevents the envelope 6 from coming into contact with the folding roller 4 and on the other hand ensures that the sheet 10 runs under the lamella 26.
  • the function of the lamella 26 corresponds to that of the sheet 21 now entering. If the friction between the lamella 26 and the folding roller 4 is disturbing, the latter can be turned out over the width of the lamella 26 and a fixed circular ring or a circular ring segment can be arranged there.
  • FIG. 3a (reduced in scale compared to FIG. 3), the sheet 10 to be folded with the envelope 6 has already passed between the folding roller 4 and the conveyor belt 3 in the direction of the arrow.
  • the envelope 6 on the oblique fold 8 has already opened a little and would not run under the folding roller in this position after reversing from the transport direction, but would crumple or open completely.
  • the sheet 21 is inserted (the lamella 26 is omitted in FIGS. 3a to 3c).
  • the sheet 21 is attached to a lever 22 which is mounted in a pivot point 25.
  • the lever is pulled upwards by a tension spring 23 in the idle state.
  • an electromagnet 24 is excited by a sensor (not shown) and presses the lever 22 with the sheet 21 downwards.
  • the sheet 21 lies on the open envelope 6, holds it down (FIG. 3b) and runs with the sheet 10 under the folding roller 4.
  • the sheet 21 protrudes below the folding roller 5, so that the sheet 10 forms the next longitudinal fold 14 in the transverse region of the sheet 21 (FIG. 3c).
  • FIG. 5 and 6 show in detail the width of the envelope 6 with the oblique fold 8.
  • FIG. 5 shows a section of a sheet 30 of size DIN A1 to be folded, on which stitching holes 16 are provided on the left binding edge 11 in the lower region.
  • the transverse fold 13 is produced so that without the oblique fold 8 the area of the envelope 6 would lie in the area of the stitching holes 16.
  • the envelope 6 is formed around the oblique fold 8, which is indicated by the dashed line 15. If the upper part of the sheet 10 is now folded down about the transverse fold 13, the boundaries along the oblique fold 8 are released from the stitching holes 16 in accordance with the dashed line 17.
  • the angle 7 must be at least 6 ° (for DIN 2 A 0 according to DIN 824: 6.72 °).
  • FIG. 6 shows a section of a sheet 40 of size DIN A 0 to be folded, in which two areas have to be folded over in the vertical direction in the transverse folding.
  • the oblique fold 8 has the same angle 7 as in FIG. 5.
  • adhesive points 9 or punchings
  • two adhesive points 9 are sufficient for the relatively short oblique fold 8 of FIG. 5
  • four adhesive points 9 are expediently provided for the longer oblique fold 8 of FIG. 6.
  • These adhesive points 9 can either be arranged to the right of the oblique fold 8 (as in FIGS. 5 and 6); however, it is also possible to attach them to the left of the oblique fold 8 on the inside of the envelope 6. All adhesive points 9 or punched holes lie on a straight line 18 with an inclination angle 19 that is the same for all sheet sizes with respect to the binding edge 11.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Claims (12)

1. Procédé pour le pliage mécanique de feuilles (10), telles que des tirages de dessins ou similaires, selon des plis logitudinaux (14) parallèles entre eux, et selon un pli oblique (8) destiné à la formation d'une enveloppe (6) du côté destiné à la reliure de la feuille, les plis de la feuille étant obtenus per pliage à la calandre, caractérisé par le fait que la feuille est introduite le long du pli oblique dans la fente de pliage d'une calandre plieuse (4, 5) réversible, et que l'enveloppe (6) formée ainsi par le pli oblique est maintenue vers le bas au moins jusqu'à ce que la partie de la feuille pliée en zigzag le long du premier et du deuxième pli longitudinal, soit placée au dessus de l'enveloppe.
2. Procédé selon la revendication 1, caractérisé par le fait qu'avant la création du pli oblique les surfaces intérieures de l'enveloppe sont munies d'un ou de plusieurs points de colle (1).
3. Procédé selon la revendication 2, caractérisé par le fait que l'on emploie comme colle un adhésif, par exemple un adhésif à recristalisation qui se détruit après un certain temps et ainsi élimine le collage.
4. Procédé selon la revendication 1, caractérisé par le fait que l'enveloppe est reliée par des dents grâce à des poinçonnements localisés, à la partie de la feuille située sous elle.
5. Procédé selon l'une des revendications 1 à 4, caractérisé par le fait que les points de colle, ou les poinçonnements sont réalisés pour toutes les dimensions de feuilles sur une ligne droite présentant le même angle d'inclination par rapport au bord de reliure de la feuille.
6. Procédé selon la revendication 1, caractérisé par le fait que l'enveloppe est maintenue vers le bas mécaniquement.
7. Procédé selon la revendication 6, caractérisé par le fait qu'une feuille mince (21) constituée en particulier par du métal, est glissée entre l'enveloppe et le rouleau de pliage tourné vers cette dernière.
8. Procédé selon une des revendications précédentes, caractérisé par le fait qu'un moyen de fixation chimique est déposé sur le bord de reliure de la feuille au moins dans la zone des (futurs) trous destiné à déclasser et qu'ensuite les trous destinés à déclasser sont découpés,
9. Installation pour l'exécution du procédé selon la revendication 7, comportant deux rouleaux de pliage réversibles laissant entre eux une fente d'engagement, qui forment deux fentes de pliage avec des contre-rouleaux ou avec une bande antagoniste commune, caractérisé par le fait qu'une tôle élastique mince (21) peut être introduite dans la zone de la largeur de l'enveloppe (6) à partir d'une position de repos depuis le côté opposé à la fente d'engagement (27), dans la fente de pliage que la feuille (10) parcourt en premier, et que la tôle (21) peut être emportée avec la feuille (10) à travers la fente de pliage par le rouleau de pliage (4) réversible, à l'encontre d'une force de rappel (ressort 23).
10. Installation selon la revendication 9, caractérisé par le fait que la tôle (21), au point le plus éloigné où elle est emportée, franchit la fente d'engagement
(27) de telle façon que le pli longitudinal (14) suivant produit par le rouleau de pliage (4) dans la zone de la tôle (21) se forme entre cette dernière et le rouleau de pliage (4).
11. Installation selon la revendication 9 ou 10, caractérisé par le fait qu'une fine lamelle élastique (26) s'étend dans la zone de la largeur de l'enveloppe (6) parallèlement à la direction de déplacement de la tôle (21) en restant dans la fente de pliage et recouvre partiellement avec un faible écart le rouleau de pliage (4) dans la zone de la fente d'engagement (27).
EP85103396A 1984-03-30 1985-03-22 Procédé et dispositif pour le pliage mécanique de feuilles telles que calques ou similaires Expired EP0158860B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843411739 DE3411739A1 (de) 1984-03-30 1984-03-30 Verfahren und vorrichtung zum maschinellen falten von bogen wie zeichnungspausen oder dergleichen
DE3411739 1984-03-30

Publications (2)

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EP0158860A1 EP0158860A1 (fr) 1985-10-23
EP0158860B1 true EP0158860B1 (fr) 1987-10-07

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EP85103396A Expired EP0158860B1 (fr) 1984-03-30 1985-03-22 Procédé et dispositif pour le pliage mécanique de feuilles telles que calques ou similaires

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DE (2) DE3411739A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3732736A1 (de) * 1987-09-29 1989-04-13 Meteor Siegen Apparat Schmeck Grossformatiges, bogenfoermiges faltgut, insbesondere zeichnungskopie (lichtpause) nach din 824

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276660B (de) * 1963-05-03 1968-09-05 Wilhelm Franz Jordis Vorrichtung zum Falten von Papierbogen od. dgl.
DE1812557C3 (de) * 1968-12-04 1974-10-17 Harri 5606 Gruiten Mones Maschine zur Zick-Zack-Faltelung von Bögen, insbesondere Papierbögen
DE3043491C2 (de) * 1980-11-18 1984-07-19 Natronag Gesellschaft für Verpackungssysteme mbH, 3380 Goslar Verfahren zum Transport und ggf. Vereinzeln von einem Stapel flacher Schlauchabschnitte und zur Verarbeitung zu einem Sack vorgesehener Schlauchabschnitt

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DE3411739A1 (de) 1985-10-10
EP0158860A1 (fr) 1985-10-23
DE3560743D1 (en) 1987-11-12

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