EP0800444B1 - Querschneider für bahnen von papierbogen - Google Patents

Querschneider für bahnen von papierbogen Download PDF

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Publication number
EP0800444B1
EP0800444B1 EP95941734A EP95941734A EP0800444B1 EP 0800444 B1 EP0800444 B1 EP 0800444B1 EP 95941734 A EP95941734 A EP 95941734A EP 95941734 A EP95941734 A EP 95941734A EP 0800444 B1 EP0800444 B1 EP 0800444B1
Authority
EP
European Patent Office
Prior art keywords
cutting
blade
roll
cutting roll
curved section
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
EP95941734A
Other languages
English (en)
French (fr)
Other versions
EP0800444A1 (de
Inventor
Jussi Similä
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.)
GMA Printing Systems Oy AB
Original Assignee
GMA Printing Systems Oy AB
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 GMA Printing Systems Oy AB filed Critical GMA Printing Systems Oy AB
Publication of EP0800444A1 publication Critical patent/EP0800444A1/de
Application granted granted Critical
Publication of EP0800444B1 publication Critical patent/EP0800444B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
    • B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like

Definitions

  • the present invention relates to a cross-cutting apparatus for a web of paper sheets, especially for trimming the edge of bundles of paper sheets formed by printed matter, said apparatus comprising a cutting roll and a counter roll between which the web of paper sheets runs and which are driven at a peripheral speed slightly higher than the running speed of the web of paper sheets, a crosswise cutting blade associated with the cutting roll and fastened to a blade carrier which is mounted on the cutting roll to rotate therewith and which is movable relative to the cutting roll during the course of cutting action, as well as a counter blade associated with the counter roll and the cutting blade placing itself alongside it during said cutting action, a pivotable mounting axle whereby the blade carrier is mounted on the cutting blade, and a follower wheel eccentrically connected to the end of the mounting axle and forced to follow a fixed guide surface, having a curvature which forces the mounting axle and, respectively, the blade carrier together with its blade to pivot in the direction opposite to the rotating direction of the cutting roll.
  • the case is not about severing a continuous web but, instead, about trimming the pages (side edge) of at least partially folded newspapers or magazines.
  • An apparatus of the invention can be used as a part of the folding mechanism in a printing machine or also separated therefrom.
  • the cross-cutter located in the vicinity of a folding apparatus can be supplied with papers from a temporary storage.
  • the cross-cutter can also be included in individual binding lines which are supplied from a bundle of papers by means of a suitable feeding mechanism.
  • the cutting blade In conventional cross-cutting, effected by the folding mechanism of a printing machine, the cutting blade is fixedly mounted on a cutting cylinder and emerges a certain distance from the cutting cylinder so as to extend inside the padding of a counter cylinder. Paper is cut between the cylinders as the latter make a turn.
  • the cutting blade When dealing with a thick (5 mm) web of paper sheets, the cutting blade must be emerged to such an extent that said blade makes a contact with the web of paper long before the point of cutting and, thus, is inclined backwards at the start of cutting and inclined forward at the end of cutting. This faulty movement produces a poor cutting result.
  • Patent publication EP-O 423,529 which defines the preamble of claim 1, discloses a similar type of cutting-trimming device, wherein the cutting blades are adapted to be movable in such a manner that the same cutting cylinders can be used for cutting to various format lengths. This is based on the fact that the cutting blades can be set for peripheral speeds that are different from those of the cutting cylinders.
  • This prior known device suffers from exactly the same blade attitude defects as the above-described devices, in which the blades are fixedly mounted on cylinders. In other words, the impairment of cutting result caused by the change of attitude between blade and web has not been eliminated.
  • Patent application FI-932623 discloses a device of the above-described type, whereby cross-cutting is effected to the length of a certain format, yet in such a manner that the change of attitude between blade and web is avoided during cutting.
  • This prior known device is provided with a leverage for retaining the blade at all times perpendicular relative to the web of paper sheets while pressing the blade away from the cutting roll during cutting.
  • the leverage in this prior known device is structurally difficult to design.
  • An object of the invention is to provide a structurally simple cross-cutting apparatus, which is capable of retaining the blade perpendicular relative to the plane of a sheet or a bundle of sheets to be cut.
  • the web of paper sheets to be cut can be produced in the folding mechanism of a newspaper or magazine printing machine.
  • the web consists of separate, at least partially folded papers which are subjected to trimming effected by way of cross-cutting.
  • the web of paper sheets travels through between a cutting roll 1 and a counter roll 2.
  • the rolls 1, 2 have a peripheral speed which is slightly higher than the speed of the web of paper sheets and, thus, the rolls 1, 2 are not in contact with the web which is carried e.g. by means of belt conveyors on either side of the rolls 1, 2.
  • a cutting tool 3 is mounted on a blade carrier 4 which is secured to the cutting roll 1 by way of a mounting axle 5.
  • the mounting axle 5 is journalled to be rotatable relative to the roll 1.
  • the other end of the mounting axle 5 is provided with an eccentric pin 6 which is surrounded by a follower wheel 7 that is pressed e.g. by a spring force against a fixed guide surface 8.
  • a follower wheel 7 that is pressed e.g. by a spring force against a fixed guide surface 8.
  • the follower wheel 7 rolls along the guide surface 8 and determines the angular position for the mounting axle 5.
  • the shape of said guide surface 8 can have an effect on the angular position of the blade 3.
  • this is also affected by the distance of the mounting axle 5 from a line c connecting the centre axes of rolls 1, 2, the distance of the point of blade 3 from the centre line of mounting axle 5, and the eccentricity of the follower wheel 7 relative to the mounting axle 5.
  • the drawing illustrates one preferred case for selecting the mutual relationships between these dimensions.
  • the guide surface 8 is preferably provided with four different curved sections successively (Figs. 2 and 3; curved sections I-IV).
  • the first curved section I having an arc length of e.g. about 30°, produces the movement of blade 3 and blade carrier 4 in a rotating direction A of the cutting roll 1 and away from the cutting roll 1 prior to the arrival of said blade 3 in the cutting position shown in the figure.
  • the wheel 7 follows the curved section II of the surface 8, producing the movement of blade 3 against the rotating direction A of cutting roll 1 and towards said cutting roll 1. This movement of blade 3 in relation to roll 1 achieves the desired perpendicularity between the blade 3 and a sheet.
  • the blade 3 Alongside the blade 3 are contact blocks 13 of resilient polyurethane for pressing a sheet to be cut against the surfaces of a counter blade 9.
  • the rolls 1, 2 have a speed difference relative to the web of paper
  • the curved section II is such that the contact blocks 13 and the blade 3 have a speed which is equal to that of the web of paper.
  • the movement of blade 3 towards roll 1 is slight that, as the rolls 1 and 2 are rotating, the blade 3 extends into a slot in the counter blade 9 and performs the cutting.
  • the cutting edge of blade 3 may be inclined, such that one end of the blade commences and finishes the cutting before the other end.
  • the fourth curved section IV of guide surface 8 returns the blade 3 and blade carrier 4 to the commencing position of curved section I with minimum deceleration and acceleration forces.
  • the movements of the counter blade 9 are arranged consistently with those of the blade 3. Therefor, the counter blade 9 is secured to the roll 2 through the intermediary of a pivotable mounting axle 10.
  • the axle 10 is pivoted by means of an eccentric follower wheel 11 and a guide surface 12.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Claims (4)

  1. Querschneidevorrichtung für eine Papierbogenbahn, insbesondere zum Trimmen der Kante von Bündeln aus Papierbogen von Drucksachen, wobei die Vorrichtung eine Schneidwalze (1) und eine Gegenwalze (2) umfasst, zwischen denen die Papierbogenbahn läuft und die mit einer Umfangsgeschwindigkeit angetrieben werden, die etwas höher ist als die Laufgeschwindigkeit der Papierbogenbahn, eine querschneidende Klinge (3), die der Schneidwalze (1) zugeordnet und an einem Klingenträger (4) angebracht ist, der auf der Schneidwalze (1) befestigt ist und mit dieser rotiert und der relativ zur Schneidwalze (1) während des Verlaufs des Schneidevorganges beweglich ist sowie eine Gegenklinge (9) umfaßt, die der Gegenwalze (2) zugeordnet ist, wobei sich die Schneidklinge (3) selbsttätig längsseits während des Schneidevorganges positioniert und wobei der Klingenträger (4) um eine drehbare Befestigungsachse (5) auf der Schneidwalze (1) befestigt ist, und ein getriebenes Rad (7), das exzentrisch mit dem Ende der Befestigungsachse (5) verbunden ist, gezwungen wird, einer fixierten Führungsoberfläche (8) zu folgen, welche einen gekrümmten Abschnitt (II) aufweist, der die Bewegungsachse (5) beziehungsweise den Klingenträger (4) gemeinsam mit seiner Klinge (3) dazu zwingt, sich in die Richtung zu drehen, die der Drehrichtung der Schneidwalze (1) entgegengesetzt ist,
    dadurch gekennzeichnet,
    dass der gekrümmte Abschnitt (II) der Führungsoberfläche (8), dem das Rad (7) während des Schneidevorganges folgt, so gestaltet ist, dass sie die Bewegung der Klinge (3) zur Schneidwalze (1) hin bewirkt, während sich die Klinge gleichzeitig gegen die Drehrichtung der Schneidwalze in einer Geschwindigkeit bewegt, die in bezug zur Drehgeschwindigkeit der Schneidwalze (1) so ist, dass die Klinge während der gesamten Schneidebewegung ihre senkrechte Position relativ zur Ebene eines Blattes oder eines Bündels von Blättern, die zu schneiden sind, behält.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet,
    dass die Führungsoberfläche (8) vier unterschiedliche gekrümmte Abschnitte einschließt, nämlich
    einen ersten gekrümmten Abschnitt (I), der eine Bewegung der Klinge (3) und des Klingenträgers (4) in die Drehrichtung der Schneidwalze (1) und weg von der Schneidwalze (1) erzeugt, bevor die Klinge (1) in die Schneideposition kommt,
    einen zweiten gekrümmten Abschnitt (II), dem das Rad (7) während der Schneidebewegung folgt und welcher eine Bewegung der Klinge (3) gegen die Drehrichtung der Schneidwalze (1) und zur Schneidwalze (1) erzeugt,
    einen dritten gekrümmten Abschnitt (III), dem das Rad (7) nach dem Schneiden folgt und welcher die Bewegung der Klinge (3) und des Klingenträgers (4) zur Schneidwalze (1) hin beschleunigt, und
    einen vierten gekrümmten Abschnitt (IV), dem das Rad (7) folgt, um zum Beginn des ersten gekrümmten Abschnitts mit minimalen Beschleunigungs- und Verzögerungskräften zurückzukehren.
  3. Vorrichtung nach Anspruch 1 oder 2,
    dadurch gekennzeichnet,
    dass die Gegenklinge (9) mit einer Befestigungsachse (10) ausgestattet ist, die so angepaßt ist, dass sie eine Drehbewegung ausführt, die im wesentlichen mit jener der Befestigungsachse (5) der Schneideklinge (3) übereinstimmt.
  4. Vorrichtung nach den Ansprüchen 1 - 3,
    dadurch gekennzeichnet,
    dass die Befestigungsachsen (5, 10) der Schneidklinge (3) beziehungsweise und der Gegenklinge (9) an deren Enden mit exzentrischen Stiften (6) versehen sind und die getriebenen Räder (7,11) darauf gelagert sind.
EP95941734A 1994-12-28 1995-12-22 Querschneider für bahnen von papierbogen Expired - Lifetime EP0800444B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI946114 1994-12-28
FI946114A FI101352B1 (fi) 1994-12-28 1994-12-28 Paperiarkkiradan poikittaisleikkuulaite
PCT/FI1995/000707 WO1996020072A1 (en) 1994-12-28 1995-12-22 Cross-cutting apparatus for a web of paper sheets

Publications (2)

Publication Number Publication Date
EP0800444A1 EP0800444A1 (de) 1997-10-15
EP0800444B1 true EP0800444B1 (de) 2000-06-21

Family

ID=8542068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95941734A Expired - Lifetime EP0800444B1 (de) 1994-12-28 1995-12-22 Querschneider für bahnen von papierbogen

Country Status (4)

Country Link
EP (1) EP0800444B1 (de)
DE (1) DE69517601T2 (de)
FI (1) FI101352B1 (de)
WO (1) WO1996020072A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI981036A (fi) * 1998-05-11 1999-11-12 Valmet Corp Kaksoisrotaatioleikkurin terän välyksen säätölaite
IT1312033B1 (it) * 1999-03-29 2002-04-04 Italconverting Srl Dispositivo di taglio per macchina ribobinatrice.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2128871A1 (de) * 1971-06-11 1972-12-21 Will E C H Fa Querschneider zum Abschneiden von Bogen von einem Papierstreifen oder derg!
DE2244747C3 (de) * 1972-09-12 1975-03-13 Bruderhaus Maschinen Gmbh, 7410 Reutlingen Vorrichtung zum Querschneiden von Bahnen aus Papier od.dgl
SE382310B (sv) * 1974-07-15 1976-01-26 Wifag Maschf Anordning for avskerning av pappersbanan i en falsningsapparat
US4742741A (en) * 1986-04-07 1988-05-10 The Dow Chemical Company Rotary sheeter
DE3718776C1 (de) * 1987-06-04 1988-08-25 Strecker Valmet Rotations-Gleichlaufquerschneider
DE3934673A1 (de) * 1989-10-18 1991-04-25 Man Miller Druckmasch In der formatlaenge verstellbare querschneidvorrichtung fuer laufende bahnen

Also Published As

Publication number Publication date
WO1996020072A1 (en) 1996-07-04
EP0800444A1 (de) 1997-10-15
FI101352B (fi) 1998-06-15
FI101352B1 (fi) 1998-06-15
FI946114A0 (fi) 1994-12-28
FI946114A (fi) 1996-06-29
DE69517601D1 (de) 2000-07-27
DE69517601T2 (de) 2001-02-15

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