EP0896865B1 - Abstreifer mit Stiften - Google Patents

Abstreifer mit Stiften Download PDF

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Publication number
EP0896865B1
EP0896865B1 EP19970202486 EP97202486A EP0896865B1 EP 0896865 B1 EP0896865 B1 EP 0896865B1 EP 19970202486 EP19970202486 EP 19970202486 EP 97202486 A EP97202486 A EP 97202486A EP 0896865 B1 EP0896865 B1 EP 0896865B1
Authority
EP
European Patent Office
Prior art keywords
stripper
cylinder
pin
bridge piece
support
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
EP19970202486
Other languages
English (en)
French (fr)
Other versions
EP0896865A1 (de
Inventor
Michael Elkis
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.)
Ward Holding Co Inc
Original Assignee
Ward Holding Co Inc
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 Ward Holding Co Inc filed Critical Ward Holding Co Inc
Priority to DE69720437T priority Critical patent/DE69720437T2/de
Priority to EP19970202486 priority patent/EP0896865B1/de
Publication of EP0896865A1 publication Critical patent/EP0896865A1/de
Application granted granted Critical
Publication of EP0896865B1 publication Critical patent/EP0896865B1/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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1836—Means for removing cut-out material or waste by pulling out

Definitions

  • the present invention relates to machines for printing, die cutting, and otherwise processing individual sheets of paperboard, such as sheets of corrugated, and more particularly to an improved pin stripper for removing relatively small pieces of scrap from the product sheets after such sheets have been cut in a die cutter.
  • the present invention in which the necessary torque is transmitted from one eccentric cylinder section to the other, while allowing for relative radial movement between the cylinders, and the mid-section of the stripping cylinder is supported, and preferably with quick-acting means to release the stripping cylinder for each removal and replacement.
  • a pin stripper comprising in combination:
  • said support shaft is stationary and said bridge piece is bearing-mounted on said support shaft.
  • said torque transmitting means comprise first and second annular rings connected to said first and second eccentric cylinder sections respectively, and first and second drive elements connected to said first and second annular rings respectively, and to said bridge piece.
  • said bridge piece includes axially extending holes, and said drive elements extend into said holes.
  • said pin stripper further includes connector means connecting said bridge piece to said annular support ring.
  • said connector means comprise a plurality of pins extending between said bridge piece and said annular support ring.
  • said connector means include a plurality of pistons connected to said pins for moving said pins into and out of engagement such as to lock and unlock said bridge piece and said support ring.
  • the pin stripper further comprises:
  • said pin stripper further includes pistons connected to said pins, and means for fluid actuating said pistons to move said movable pins.
  • said pin stripper further comprises an eccentric journal mounted on said support for supporting said inner eccentric cylinder.
  • a typical printing and paperboard processing machine is schematically illustrated by numeral 10.
  • Such printing and processing machines generally include a feed section 12 which contains a stack of paperboard sheets to be printed, cut and otherwise processed such as to form, for example, corrugated blanks for making corrugated boxes.
  • Machine 10 is further illustrated as including three printing sections 14, 16 and 18 each of which includes a print cylinder 20 and an impression cylinder 22.
  • printing sections 14, 16 and 18 each of which includes a print cylinder 20 and an impression cylinder 22.
  • more or less printing sections may be included depending upon the type and number of colours of ink to be employed.
  • FIGs. 1 and 2 schematically illustrate one type of pin stripper which generally comprises an outer cylinder, or stripping die, 28 which carries a large plurality of stripping pin assemblies 30, two of which are illustrated schematically in Fig. 2.
  • Pins 33 are contained within threaded casings 32 which are mounted on stripping cylinder 28 which rotates about its longitudinal axis 34. Pins 33 pierce the scrap pieces, such as scrap piece 36 of paperboard sheet 38, at a predetermined angular position of the die cutter as shown in Fig. 2.
  • An inner eccentric cylinder 40 which rotates about its longitudinal axis 41, moves pin sleeves (not shown) outwardly so as to remove the scrap pieces from the pins at a second angular position.
  • pin sleeves (not shown) outwardly so as to remove the scrap pieces from the pins at a second angular position.
  • the longitudinal or axial length of the stripping cylinders has become longer and longer such that serious problems have been encountered in transmitting torque axially through the cylinders.
  • the outer stripper cylinders 28 are generally comprised of plywood formed in two circumferentially extending halves, and it is necessary to support these halves by one or more semi-annular support rings such as support ring 44 shown in Fig. 3B.
  • a portion of ring 44 must pass through the gap between the axial ends of eccentric cylinders 40A and B, and yet, constant torque must be transmitted throughout the entire lengths of both of cylinders 28 and 40.
  • eccentric journals 46 are provided on each end of a single support shaft 48.
  • the left end is shown in Fig. 3A and the mid-section is shown in Fig. 3B; it being understood that the right end may be identical to the left end as described.
  • Support shaft 48 extends the full axial length of stripping cylinder 28 and the full axial length of eccentric cylinder sections 40A and B, and shaft 48 is held stationary by conventional shaft mounting means 49.
  • Eccentric journal 46 is fixed to stationary shaft 48, and the eccentric is surrounded by bearings 50. The outer race of the bearings is connected by connector 52 to the inner cylindrical surface of eccentric cylinder section 40A.
  • the right hand end of eccentric cylinder section 40B is mounted on an eccentric journal and bearing (not shown) which may be of identical construction. In this manner, both of eccentric cylinder sections 40A and B are free to rotate about axis 41 when suitably driven.
  • cylinder sections 40A and 40B must be separated by a gap in order to permit annular support ring 44 to pass therethrough, and support ring 44 must be supported by shaft 48.
  • the present invention provides for torque transmission from one eccentric cylinder section to the other by connecting a pair of annular torque transmission rings 54, 56 to the respective inner surfaces of the adjacent axial ends of the cylinder sections 40A and 40B as shown in Fig. 3B.
  • Transmission rings 54, 56 are connected to an annular connector or bridge piece 58 which is rotatably mounted on stationary shaft 48 by bearings 60.
  • one preferred structure for connecting rings 54, 56 to bridge piece 58 is to provide a plurality of axially extending plates, rods or fingers 61, 63 which are connected to rings 54, 56, respectively. Fingers 61, 63 slide axially into axial slots, bores or holes in bridge piece 58 and may be connected to each other by bolts (not shown) if desired. Thus, the fingers transmit torque from one ring to the other through bridge piece 58.
  • the axial slots have sufficient radial extent to permit radial movement of the fingers 61, 63 as the stripping cylinder 28 and inner cylinder 40 rotates. At the same time, the axial fingers enable the two eccentric cylinder sections 40A and B to be axially separated from the bridge piece and from each other for removal and replacement.
  • the outer annular surface 69 of bridge piece 58 provides a support surface which engages the inner annular surface of support ring 44 so that stripper cylinder 28 may be supported by shaft 48 at multiple points throughout its length.
  • the radially outer portion of bridge piece 58 may be removably connected to support ring 44 by a plurality of retractable locking pins 80.
  • Pins 80 may be actuated by compressed air cylinders 72 as will be more fully described hereinafter in connection with the preferred means for mounting cylinder 28 at its opposite ends as well as to support ring 44.
  • cylinder sections 40A and 40B may be supported to either side of the arrangement shown in Fig. 3B by an arrangement having an eccentric journal similar to eccentric journal 46, a bearing similar to bearing 50 and a connector similar to connector 52.
  • stripping cylinder 28 is mounted for concentric rotation about axis 34 of stationary shaft 48. In the preferred embodiment, this is accomplished by connecting a semi-circular support ring 64 to the inner surface of one half of the stripping cylinder, and removably connecting semi-circular support ring 64 to an annular end support 66 which is mounted for rotation about a reduced diameter portion of eccentric journal 46 by bearings 68.
  • semi-circular support ring 64 may be removably connected to end support 66 by various types of connectors, such as by a plurality of removable bolts, the removal of such bolts is time-consuming, and it will be understood that the stripping cylinder must be removed and replaced quite frequently in order to change the pattern of the pins whenever the die cutter is changed to a new cutting pattern.
  • the present invention provides for the mounting of support rings 64 by a plurality of compressed air actuated pins as will now be described with reference to Figs. 4 and 5.
  • the upper and lower halves of stripping cylinder 28 may be connected to semi-circular support ring 64 by machine bolts or other know connectors (not shown) and, similarly, end support 66 may be connected to a semi-circular mounting plate 70 by bolts or other known connecting means (not shown).
  • Mounting plate 70 contains a plurality of compressed air cylinders 72 each of which includes a piston 74 slidably mounted in a chamber 76 and biased to the right as viewed in Fig. 4 by a compression spring 78.
  • Piston 74 includes a stem or pin portion 80 which is forced into and maintained in a locking relationship in a hole 82 in semi-circular support ring 64.
  • the input drive for rotating both stripper cylinder 28 and eccentric cylinder 40 may be supplied from a motor, through gearing not shown, to a drive coupling 90 mounted on a bearing 91 surrounding shaft 48; it being understood that such drive may be positioned at either end of shaft 48.
  • Coupling 90 may be removably connected to end support 66 by a plurality of bolts 92, or by other connector means known per se.
  • End support 66 drives the left end of stripping cylinder 28 through semi-circular plate 70, pins 80 and support ring 64 as previously described.
  • Coupling 94 preferably comprises a pair of rollers 96 mounted on pins 100 connected to connector piece 52 and extending axially toward end support 66. Rollers 96 engage opposite sides of an abutment 98 connected to end support 66. In this manner, abutment 98 transmits torque from end support 66 through rollers 96 to connector 52, while, at the same time, permitting the required relative radial movement between stripper cylinder 28 and eccentric cylinder section 40A. This torque is then transmitted from eccentric cylinder section 40A to cylinder section 40B through support rings 54, 56 and bridge piece 58 as previously described.
  • the present invention solves the severe problem of the greater axial lengths of rotary pin strippers in a manner which provides for support of the stripper cylinder at its mid-section, while also transmitting torque from one eccentric cylinder section to the other, and which further can provide for the extremely rapid and easy removal of stripping cylinder halves as well as each of the eccentric cylinder sections. It will also be understood that numerous variations will become apparent to those skilled in the art of pin strippers, and that the foregoing description of one embodiment of the invention is intended to be purely illustrative of the principles of the invention, rather than limiting thereof, and that the legal scope of the invention is not intended to be limited other than as set forth in the following claims.

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)
  • Paper (AREA)

Claims (10)

  1. Abstreifeinrichtung mit Stiften, die in Kombination umfaßt:
    (a) einen äußeren Abstreifzylinder (28), der sich um eine erste Achse dreht;
    (b) einen inneren exzentrischen Zylinder (40), der sich um eine zweite Achse dreht, die zu der ersten parallel ist, jedoch mit dieser nicht zusammenfällt;
    (c) eine Trägerwelle (48), die sich axial längs der ersten Achse erstreckt; dadurch gekennzeichnet, daß
    (d) der innere exzentrische Zylinder (40) erste (40A) und zweite (40B) Abschnitte umfaßt, die längs der zweiten Achse voneinander beabstandet sind;
    (e) der äußere Abstreifzylinder (28) einen ringförmigen Trägerring (44) besitzt, der sich zwischen den ersten (40A) und zweiten (40B) exzentrischen Zylinderabschnitten radial einwärts erstreckt;
    (f) an einer axialen Position an der Trägerwelle (48) in der Nähe des ringförmigen Trägerrings (44) ein Brückenteil (58) angebracht ist;
    (g) Drehmomentübertragungsmittel (54, 56) das Brückenteil (58) mit jedem der ersten (40A) und (40B) exzentrischen Zylinderabschnitte verbinden.
  2. Abstreifeinrichtung mit Stiften nach Anspruch 1, bei der die Trägerwelle (48) stationär ist und das Brückenteil (58) an der Trägerwelle über Lager angebracht ist.
  3. Abstreifeinrichtung mit Stiften nach Anspruch 1 oder 2, bei der die Drehmomentübertragungsmittel (54, 56) erste und zweite Ringe, die mit den ersten (40A) bzw. zweiten (40B) exzentrischen Zylinderabschnitten verbunden sind, sowie erste (61) und zweite (63) Antriebselemente, die mit den ersten bzw. zweiten Ringen und mit dem Brückenteil (48) verbunden sind, umfassen.
  4. Abstreifeinrichtung mit Stiften nach Anspruch 3, bei der das Brückenteil axial verlaufende Löcher enthält und die Antriebselemente sich in diese Löcher erstrecken.
  5. Abstreifeinrichtung mit Stiften nach einem der Ansprüche 1 bis 4, die ferner Verbindermittel umfaßt, die das Brückenteil mit dem ringförmigen Tragring (44) verbinden.
  6. Abstreifeinrichtung mit Stiften nach Anspruch 5, bei der die Verbindermittel mehrere Stifte (80) umfassen, die sich zwischen dem Brückenteil (58) und dem ringförmigen Trägerring (44) erstrecken.
  7. Abstreifeinrichtung mit Stiften nach Anspruch 6, bei der die Verbindermittel mehrere Kolben (72) enthalten, die mit den Stiften verbunden sind und die Stifte in Eingriff and außer Eingriff bewegen können, um das Brückenteil (58) und den Trägerring (44) zu verriegeln bzw. zu entriegeln.
  8. Abstreifeinrichtung mit Stiften nach einem vorhergehenden Anspruch, die ferner umfaßt:
    wenigstens einen Trägerring (64), der mit dem Abstreifzylinder (28) in der Nähe eines seiner Enden verbunden ist;
    einen Endträger (66), der den Abstreifzylinder an der Trägerwelle (58) längs der ersten Achse unterstützt; und
    mehrere bewegliche Stifte (80), die den Trägerring (64) mit dem Endträger (66) lösbar verbinden, damit der Abstreifzylinder (28) entnommen werden kann.
  9. Abstreifeinrichtung mit Stiften nach Anspruch 8, die ferner Kolben (74), die mit den Stiften (80) verbunden sind, und Mittel für eine Fluidbetätigung der Kolben, um die beweglichen Stifte zu bewegen, umfaßt.
  10. Abstreifeinrichtung mit Stiften nach einem vorhergehenden Anspruch, die ferner einen exzentrischen Lagerzapfen (46) umfaßt, der an der Trägerwelle angebracht ist und den inneren exzentrischen Zylinder trägt.
EP19970202486 1997-08-12 1997-08-12 Abstreifer mit Stiften Expired - Lifetime EP0896865B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE69720437T DE69720437T2 (de) 1997-08-12 1997-08-12 Abstreifer mit Stiften
EP19970202486 EP0896865B1 (de) 1997-08-12 1997-08-12 Abstreifer mit Stiften

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19970202486 EP0896865B1 (de) 1997-08-12 1997-08-12 Abstreifer mit Stiften

Publications (2)

Publication Number Publication Date
EP0896865A1 EP0896865A1 (de) 1999-02-17
EP0896865B1 true EP0896865B1 (de) 2003-04-02

Family

ID=8228636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970202486 Expired - Lifetime EP0896865B1 (de) 1997-08-12 1997-08-12 Abstreifer mit Stiften

Country Status (2)

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EP (1) EP0896865B1 (de)
DE (1) DE69720437T2 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320864A (en) * 1964-10-30 1967-05-23 Zerand Corp Self-combing pin type stripper for blank forming apparatus
US3371584A (en) * 1966-07-08 1968-03-05 Zerand Corp Self-combing pin type stripper for blank-forming apparatus
US4295842A (en) * 1979-12-31 1981-10-20 The Ward Machinery Company Stripping device for removing waste sheet board
DE3803887A1 (de) * 1988-02-09 1989-08-17 Franz Burghart Rotations - abfallausbrechvorrichtung fuer gestanzte flache materialien
US5087237A (en) * 1990-10-26 1992-02-11 Nunley Forrest E Adjustable rotary waste removal system for rolls of die cut paperboard
US5300009A (en) * 1993-06-15 1994-04-05 Bittenbender Dan L Paperboard waste stripping apparatus

Also Published As

Publication number Publication date
EP0896865A1 (de) 1999-02-17
DE69720437T2 (de) 2004-05-19
DE69720437D1 (de) 2003-05-08

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