EP0775040B1 - Cutter with ring-shaped blade - Google Patents

Cutter with ring-shaped blade Download PDF

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Publication number
EP0775040B1
EP0775040B1 EP95925737A EP95925737A EP0775040B1 EP 0775040 B1 EP0775040 B1 EP 0775040B1 EP 95925737 A EP95925737 A EP 95925737A EP 95925737 A EP95925737 A EP 95925737A EP 0775040 B1 EP0775040 B1 EP 0775040B1
Authority
EP
European Patent Office
Prior art keywords
cutting
ring
guide element
flank
cutting apparatus
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
EP95925737A
Other languages
German (de)
French (fr)
Other versions
EP0775040A1 (en
Inventor
Mario Hiss
Frank Schreiber
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.)
Lupra D Kehret KG Lufthydraulische Praezisionsapp
Original Assignee
LUPRA D KEHRET LUFTHYDRAULISCHE PRAEZISIONSAPPARATE
AS-DRUCK GmbH
Druck As GmbH
LUPRA D KEHRET LUFTHYDRAULISCH
LUPRA D KEHRET LUFTHYDRAULISCHE PRAZISIONSAPPARATE
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Publication date
Application filed by LUPRA D KEHRET LUFTHYDRAULISCHE PRAEZISIONSAPPARATE, AS-DRUCK GmbH, Druck As GmbH, LUPRA D KEHRET LUFTHYDRAULISCH, LUPRA D KEHRET LUFTHYDRAULISCHE PRAZISIONSAPPARATE filed Critical LUPRA D KEHRET LUFTHYDRAULISCHE PRAEZISIONSAPPARATE
Publication of EP0775040A1 publication Critical patent/EP0775040A1/en
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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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/10—Making cuts of other than simple rectilinear form
    • 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
    • B26D1/01—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 does not travel with the work
    • B26D1/44—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 does not travel with the work having a cup or like cutting member
    • B26D1/445—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 does not travel with the work having a cup or like cutting member for thin material, e.g. for sheets, strips or the like
    • 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
    • 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
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
    • 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
    • B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
    • B26D2007/0068—Trimming and removing web edges

Definitions

  • the invention relates to a cutting device for Separating a cut strip from a flexible, flat aligned, thin object with a ring knife rotatable about a central axis, the one ring-shaped closed outer cutting flank as well as a closed inner ring Has cutting edge that is inclined towards each other run towards an annular cutting edge and on are attached to a floor, and with one inside extending the inner cutting flank, the ring knife traversing, elongated guide element for Management of the object to be processed.
  • Such a cutting device is from US-A-1,930,489 known.
  • a ring knife that can be rotated around a central axis provided that an annular closed, outer bevelled against the central axis Cutting edge and a closed ring has inner cutting flank that against each other inclined towards an annular cutting edge and are attached to a floor.
  • the generic Cutting device also has an intermediate the inner cutting flank arranged that Ring knife crossing elongated guide element for Management of the object to be processed, which as rotatable feed roller is executed.
  • the outside surface the feed roller is curved in the axial direction formed, the radius of curvature of the feed roller in the axial direction essentially the radius of curvature corresponds to the inner cutting edge.
  • the feed roller is close to the outside surface inner cutting edge arranged adjacent so that one from the feed roller under angled orientation fed to the ring knife in the axial direction, flexible, flat-aligned, thin object forming one entering the ring knife Cutting strip is processed.
  • a cutting device is known from DE 27 50 835 A1 known in which a ring knife with an annular closed outer cutting edge and one closed inner cutting flank is provided which is inclined towards one another ring-shaped cutting edge. That about a central axis rotatable ring knife is by one of the Cut off the opposite floor to finish off to which the cutting flanks are attached.
  • At the edge of the ring knife near the cutting edge is one Role provided as a guide element over the thin object, such as paper or cardboard, is tangential to the cutting edge.
  • the Roll is at a radial distance from the cutting edge adjusted, which is smaller than the material thickness of the object.
  • the inner cutting edge is cylindrical, while the outer Cutting edge is chamfered radially outwards.
  • the radial distance of the roll from the Cutting edge corresponds.
  • the width of the chip is by the radius of the hollow knife, the contact pressure, the shape of the roll and the rigidity of the thin Determined object.
  • the item is with a pressure device opposite the roller, preferably a compressed air nozzle, on the roll depressed. After the chip is lifted, the slides Paper or cardboard web on the bevel of the outer knife edge so that in the area of Cut one in the item to be machined Bending stress is generated, which is the lifting of the Spanes relieved.
  • the latter cutting device allows the separation of relatively narrow strips from the thin object, for example around folded edges or glue grooves, but that is generic cutting device not very suitable, to material across the entire thickness of the thin object separate because of the tangential Feed the object to the cutting edge thinly tapering and irregular tearing inclined separating edge is formed.
  • one Adjustment of the cutting device to achieve different Final widths of the object to be processed not practical.
  • a cutting device known for peeling material the one by one Central axis rotatable ring knife with a ring-shaped closed, cylindrical outer Cutting edge and a closed ring has inner cutting flank that against each other inclined towards an annular cutting edge and are attached to a floor.
  • the cutting device has an arcuate, in radial Slidable in the direction opposite the cutting edge Guide element with which the thickness of peeled Material when the item is fed the cutting edge is adjustable.
  • the cutting element is formed by a disc-shaped cutting wheel, the cutting edge being inclined towards one another Cutting edges on both sides of a central plane on the Scope of the cutting wheel is formed.
  • the cutting wheel is on a thin too cutting object, for example a paper web, put on and when the Paper web in the direction of the cutting wheel is the paper web severable.
  • Cutting devices with cutting wheels is the paper web between the cutting wheel and a cutting roller performed, the cutting wheel with a certain There is pressure on the cutting roller.
  • a cutting device in web printing machines is the paper web a freestanding cutter wheel with a relative large diameter supplied.
  • the cutting edge compared to the aforementioned Refinements less worn, but it is proportionate complex, with changing paper thicknesses the machine parameters to achieve a good cutting effect such as feed speed and / or speed the cutting wheel to coordinate with each other, for example the feeding speed is often due to printing processes is set.
  • the invention has for its object a Cutting device of the type mentioned create with a thin object, in particular a paper web with a clean separating edge and with widths that are easy to set can be cut to size.
  • the cutting device according to the invention allows continue by simply moving the ring knife across the thin object to be processed easy adjustment of the width of the separated Material, which is only due to the diameter of the ring knife is limited.
  • the guide element not be readjusted.
  • the cutting device on aligned transverse to the direction of displacement Slidably attach rods so that in simply by moving the cutting device different cutting widths can be set.
  • the ring knife When using the cutting device according to the invention in connection with a web press are the ring knife in particular several times one above the other laid paper webs with transverse to the running direction offset edges can be fed to cleanly cut Obtain paper webs of the same width. Moreover, the cutting devices are for double-sided processing without changing the mechanical structure in Running direction both right and left overhead built-in. When the ring knives are driven by electric motors are the network phases for the paper web connected in opposite directions in the same direction.
  • Fig. 1 shows a perspective view preferred embodiment of an inventive Cutting device with a pot-like ring knife 1. on the by an outer knife edge 2 and an inner Knife flank 3 which is inclined towards one another and annular are closed, a cutting edge 4 is formed.
  • the inner knife flank 3 against the outer knife edge 2 in the direction of a Central screw 5 tapered while the outer knife edge 2 has a cylindrical shape.
  • a Knife bottom 6 is provided on the inner knife flank 3 covering the inner surface of the ring knife 1.
  • the ring knife 1 is rotatable via a spacer ring 7 attached to a base plate 8.
  • the diameter of the Spacer ring 7 corresponds to the outer diameter of the Ring knife 1 or the outer knife edge 2.
  • On the spacer ring 7 is with two fastening screws 9, 10 a support table 11 attached, the along the spacer ring 7 from the base plate 8 to in extends the area of the cutting edge 4. In the area of Support table 11 align the ring knife 1 and the Spacer ring 7 with the long side of the base plate 8.
  • a swivel hinge 12 is provided, with the one rotatable about a hinge axis 13 Swivel table 14 connected to the support table 11 is.
  • the swivel table 14 extends from one the pivot hinge 12 adjacent portion of the Cut 4 over the inside of the ring knife 1 to the opposite section of the cutting edge 4th
  • a swivel surface 15 of the swivel table 14 the diameter of the ring knife 1 arranged and stands essentially at right angles on the cutting edge 4. Part of the swivel surface 15 also occurs over the cutting edge 4 in the direction of the knife base 6 in the ring knife 1, on which at the Swivel hinge 12 adjacent end of the swivel table 14 a cutting recess 16 is provided is in which the cutting edge 4 engages.
  • the length of the Swivel table 14 is dimensioned so that the Swivel hinge 12 opposite end of the Swivel table 14 in the area of the inner knife flank 3 completes.
  • the pivot surface 15 and a support surface 17 of the support table 11 In the orientation according to Fig. 1 are the pivot surface 15 and a support surface 17 of the support table 11 in one plane.
  • the ring knife 1 is opposite an electric drive motor 18 is attached, with which the ring knife 1 in two directions is drivable.
  • an electric drive motor 18 is attached, with which the ring knife 1 in two directions is drivable.
  • On the back of the base plate 8 are not in the illustration according to FIG. 1 visible gear elements provided with a cover 19 are covered.
  • a guide block 20 is attached to the base plate 8, through which a first slide rod 21 and a second slide rod 22 are performed.
  • the 1 is shown by Hand along the Slide rods 21, 22 slidably and in one position fixable with a locking lever 23.
  • the cutting device with a sliding drive on the slide rods 21, 22 periodically between two edge positions can be moved.
  • the slide rods 21, 22 are in each with one end a wall holding part 24 inserted and fixed with this connected.
  • the wall holding part 24 is with holding screws 25, 26, 27, 28 on one side wall, for example one Roll rotary machine attachable.
  • the wall holding part 24 can be fastened on one side with a pressure piece 29 is, the pressure piece 29 by two Holding screws 27, 28 is held.
  • Fig. 2 shows the in a perspective view 1 in operation when trimming one shown in detail in FIG. 2 Paper web 30.
  • the paper web 30 is, for example, at one represented by the cutout of a side wall 31 Roll rotation machine in one by one Arrow marked conveying direction 32 to the Wall holding part 24 attached to the side wall 31 Cutting device fed.
  • the paper web 30 lies on the swivel surface 15 of the swivel table 14 and on the not visible in the illustration of FIG. 2 Support surface 17 of the support table 11.
  • One on the Pivoting surface 15 of section 33 of the paper web lying thereon 30 is with the one in an arrow shown direction of rotation 34 in a plane of rotation rotating cutting edge 4 can be cut from the paper web 30.
  • the plane of rotation of the cutting edge 4 is in this embodiment aligned perpendicular to the conveying direction 32.
  • a blend strip 35 with a constant Width of section 33 is around the swivel table 14 deflected, in one marked by an arrow Direction of discharge 36 a suction hose 37 having discharge device supplied and by the Cutting device removed while the rest of the Paper web 30 on the outer knife edge 2, the spacer ring 7, the base plate 8 and the cover 19th passes by. In this way it is continuous Disposal of the waste strip 35 guaranteed.
  • FIG. 3 shows a cutting device in a longitudinal section corresponding to Fig. 1 and Fig. 2 with drive elements to drive the ring knife 1.
  • a motor pulley 40 On one Shaft 39 of the drive motor 18 is a motor pulley 40 attached, the rotation of the shaft 39 over a toothed belt, not shown in Fig. 3 on a Knife pulley 41 transmits.
  • the timing belt is included a belt tensioner 42, which is eccentric in the Base plate 8 is rotatably attached.
  • the knife pulley 41 is with the central screw 5 with the ring knife 1 connected.
  • the central screw 5 extends in the longitudinal direction through a knife column 43 of the ring knife 1, the Knife column 43 with two column bearings 44, 45 in the with Attach fastening screws 46, 47 to the base plate Bearing ring 7 is freely rotatable.
  • the 3 is the in Direction of the pivot surface 15 side of the ring knife 1 for safety reasons with a knife cover plate 48 covered to injuries from the detached Avoid part of the cutting edge 4.
  • the edges of the swivel table 14 are rounded to with a transverse to the longitudinal direction of the central screw 5 taking place the paper web 30 a damage-free Slide over the swivel table 14 to ensure, even if the pivot surface 15 is not is arranged exactly in the plane of the paper web.
  • the Curvature of the knife base 6 in the direction of the central screw 5 ensures a reliable deflection of the Waste strip 35 at a first cut of Paper web 30.
  • the guide block 20 is connected to the Slide rod 21 pressable locking screw 49 against an unintentional displacement of the cutting device fixable.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention concerns a cutter intended to cut, in particular, a continuous web of paper (30), the cutting element of the cutter being a ring-shaped blade (1) which rotates in one direction (34) and is disposed at right angles to the direction of advance (32) of the web (30) to trim the edge of the web. The cutter can be displaced by means of sliding bars (21, 22) to enable strips (33) of different width to be cut off without difficulty.

Description

Die Erfindung betrifft eine Schneidvorrichtung zum Abtrennen eines Verschnittstreifens von einem biegsamen, flach ausgerichteten, dünnen Gegenstand mit einem um eine Zentralachse drehbaren Ringmesser, das eine ringförmig geschlossene äußere Schneidflanke sowie eine ringförmig geschlossene innere Schneidflanke aufweist, die gegeneinander geneigt zu einer ringförmigen Schneide zulaufen und an einem Boden angebracht sind, und mit einem sich innerhalb der inneren Schneidflanke erstreckenden, das Ringmesser querenden, länglichen Führungselement zur Führung des zu bearbeitenden Gegenstandes.The invention relates to a cutting device for Separating a cut strip from a flexible, flat aligned, thin object with a ring knife rotatable about a central axis, the one ring-shaped closed outer cutting flank as well as a closed inner ring Has cutting edge that is inclined towards each other run towards an annular cutting edge and on are attached to a floor, and with one inside extending the inner cutting flank, the ring knife traversing, elongated guide element for Management of the object to be processed.

Eine derartige Schneidvorrichtung ist aus US-A-1,930,489 bekannt. Bei der gattungsgemäßen Schneidvorrichtung zum Abtrennen eines Verschnittstreifens von einem biegsamen, flach ausgerichteten Gegenstand ist ein um eine Zentralachse drehbares Ringmesser vorgesehen, das eine ringförmig geschlossene, gegen die Zentralachse angeschrägte äußere Schneidflanke sowie eine ringförmig geschlossene innere Schneidflanke aufweist, die gegeneinander geneigt zu einer ringförmigen Schneide zulaufen und an einem Boden angebracht sind. Die gattungsgemäße Schneidvorrichtung verfügt weiterhin über ein zwischen der inneren Schneidflanke angeordnetes, das Ringmesser querendes längliches Führungselement zur Führung des zu bearbeitenden Gegenstandes, das als drehbare Zuführrolle ausgeführt ist. Die Außenfläche der Zuführrolle ist in axialer Richtung gewölbt ausgebildet, wobei der Krümmungsradius der Zuführrolle in axialer Richtung im wesentlichen dem Krümmungsradius der inneren Schneidflanke entspricht. Die Zuführrolle ist mit der Außenfläche nahe an die innere Schneidflanke angrenzend angeordnet, so daß ein von der Zuführrolle unter schräger Ausrichtung in axialer Richtung auf das Ringmesser zugeführter, biegsamer, flach ausgerichteter, dünner Gegenstand unter Bildung eines in das Ringmesser eintretenden Verschnittstreifens bearbeitet wird. Mit dieser Vorrichtung ist zwar mit einem präzisen Schnitt eine angeschrägte Stoßkante herstellbar, allerdings ist ein Abtrennen von Verschnittstreifen mit wechselnden, sehr unterschiedlichen Breiten und demzufolge unterschiedlicher Breite des bearbeiteten Gegenstandes nur aufwendig durchführbar.Such a cutting device is from US-A-1,930,489 known. In the generic cutting device for cutting off a waste strip from a flexible, flat-aligned object is a ring knife that can be rotated around a central axis provided that an annular closed, outer bevelled against the central axis Cutting edge and a closed ring has inner cutting flank that against each other inclined towards an annular cutting edge and are attached to a floor. The generic Cutting device also has an intermediate the inner cutting flank arranged that Ring knife crossing elongated guide element for Management of the object to be processed, which as rotatable feed roller is executed. The outside surface the feed roller is curved in the axial direction formed, the radius of curvature of the feed roller in the axial direction essentially the radius of curvature corresponds to the inner cutting edge. The feed roller is close to the outside surface inner cutting edge arranged adjacent so that one from the feed roller under angled orientation fed to the ring knife in the axial direction, flexible, flat-aligned, thin object forming one entering the ring knife Cutting strip is processed. With this The device is with a precise cut a bevelled butt edge can be made, however is a separation of cut strips with changing, very different widths and consequently different widths of the processed Object can only be carried out at great expense.

Aus der DE 27 50 835 A1 ist eine Schneidvorrichtung bekannt, bei der ein Ringmesser mit einer ringförmig geschlossenen äußeren Schneidflanke sowie einer ringförmig geschlossenen inneren Schneidflanke vorgesehen ist, die gegeneinander geneigt zu einer ringförmigen Schneide zulaufen. Das um eine Zentralachse drehbare Ringmesser ist durch einen der Schneide gegenüberliegenden Boden abgeschlossen, an dem die Schneidflanken angebracht sind. Im Randbereich des Ringmessers nahe der Schneide ist eine Rolle als Führungselement vorgesehen, über die ein dünner Gegenstand, beispielsweise Papier oder Karton, tangential zu der Schneide zuführbar ist. Die Rolle ist in einem radialen Abstand von der Schneide einjustiert, der kleiner als die Materialstärke des Gegenstandes ist. Die innere Schneidflanke ist zylindrisch ausgebildet, während die äußere Schneidflanke radial nach außen angeschrägt ist. A cutting device is known from DE 27 50 835 A1 known in which a ring knife with an annular closed outer cutting edge and one closed inner cutting flank is provided which is inclined towards one another ring-shaped cutting edge. That about a central axis rotatable ring knife is by one of the Cut off the opposite floor to finish off to which the cutting flanks are attached. At the edge of the ring knife near the cutting edge is one Role provided as a guide element over the thin object, such as paper or cardboard, is tangential to the cutting edge. The Roll is at a radial distance from the cutting edge adjusted, which is smaller than the material thickness of the object. The inner cutting edge is cylindrical, while the outer Cutting edge is chamfered radially outwards.

Bei Auftreffen des zugeführten Gegenstandes auf die Schneide wird ein dünner Span abgetrennt, dessen Dicke dem radialen Abstand der Rolle von der Schneide entspricht. Die Breite des Spanes ist durch den Radius des Hohlmessers, den Anpreßdruck, der Form der Rolle und der Steifigkeit des dünnen Gegenstandes bestimmt. Der Gegenstand ist mit einer der Rolle gegenüberliegenden Anpreßeinrichtung, vorzugsweise einer Preßluftdüse, auf die Rolle niedergedrückt. Nach Abheben des Spanes gleitet die Papier- oder Kartonbahn auf die Anschrägung der äußeren Messerflanke auf, so daß im Bereich der Schneide in dem zu bearbeitenden Gegenstand eine Biegespannung erzeugt ist, die das Abheben des Spanes erleichtert.When the supplied object hits the A thin chip is cut off the cutting edge Thickness the radial distance of the roll from the Cutting edge corresponds. The width of the chip is by the radius of the hollow knife, the contact pressure, the shape of the roll and the rigidity of the thin Determined object. The item is with a pressure device opposite the roller, preferably a compressed air nozzle, on the roll depressed. After the chip is lifted, the slides Paper or cardboard web on the bevel of the outer knife edge so that in the area of Cut one in the item to be machined Bending stress is generated, which is the lifting of the Spanes relieved.

Die letztgenannte Schneidvorrichtung gestattet zwar das Abtrennen von verhältnismäßig schmalen Streifen aus dem dünnen Gegenstand, beispielsweise um Faltkanten oder Leimnuten zu bilden, allerdings ist die gattungsgemäße Schneidvorrichtung wenig geeignet, um Material über die gesamte Dicke des dünnen Gegenstandes abzutrennen, da durch die tangentiale Zuführung des Gegenstandes auf die Schneide eine dünn auslaufende und zu unregelmäßigem Abriß neigende Trennkante ausgebildet ist. Zudem ist eine Justierung der Schneidvorrichtung zum Erzielen verschiedener Endbreiten des zu bearbeitenden Gegenstandes nicht praktikabel.The latter cutting device allows the separation of relatively narrow strips from the thin object, for example around folded edges or glue grooves, but that is generic cutting device not very suitable, to material across the entire thickness of the thin object separate because of the tangential Feed the object to the cutting edge thinly tapering and irregular tearing inclined separating edge is formed. In addition, one Adjustment of the cutting device to achieve different Final widths of the object to be processed not practical.

Aus der FR-A-2 526 444 ist eine Schneidvorrichtung zum Abschälen von Material bekannt, das ein um eine Zentralachse drehbares Ringmesser mit einer ringförmig geschlossenen, zylindrischen äußeren Schneidflanke sowie einer ringförmig geschlossenen inneren Schneidflanke aufweist, die gegeneinander geneigt zu einer ringförmigen Schneide zulaufen und an einem Boden angebracht sind. Die Schneidvorrichtung verfügt über ein kreisbogenförmiges, in radialer Richtung gegenüber der Schneide verschiebbares Führungselement, mit dem die Dicke von abzuschälendem Material bei Zufuhr des Gegenstandes auf die Schneide einstellbar ist.From FR-A-2 526 444 is a cutting device known for peeling material, the one by one Central axis rotatable ring knife with a ring-shaped closed, cylindrical outer Cutting edge and a closed ring has inner cutting flank that against each other inclined towards an annular cutting edge and are attached to a floor. The cutting device has an arcuate, in radial Slidable in the direction opposite the cutting edge Guide element with which the thickness of peeled Material when the item is fed the cutting edge is adjustable.

Weiterhin sind als Schneidvorrichtungen beispielsweise sogenannte Ober- oder Untermesser bei Rollendruckmaschinen bekannt. Das Schneidelement ist durch ein scheibenförmiges Schneidrad gebildet, wobei die Schneide durch gegeneinander geneigte Schneidflanken beidseitig einer Mittelebene auf dem Umfang des Schneidrades ausgebildet ist. Üblicherweise ist das Schneidrad auf einem dünnen zu schneidenden Gegenstand, beispielsweise einer Papierbahn, aufgesetzt und bei einer Verschiebung der Papierbahn in Richtung des Schneidrades ist die Papierbahn durchtrennbar.Furthermore, as cutting devices, for example so-called upper or lower knife in web presses known. The cutting element is formed by a disc-shaped cutting wheel, the cutting edge being inclined towards one another Cutting edges on both sides of a central plane on the Scope of the cutting wheel is formed. Usually the cutting wheel is on a thin too cutting object, for example a paper web, put on and when the Paper web in the direction of the cutting wheel is the paper web severable.

In einer Ausführungsform von derartigen letztgenannten Schneideinrichtungen mit Schneidrädern ist die Papierbahn zwischen dem Schneidrad und einer Schneidrolle durchgeführt, wobei das Schneidrad mit einem gewissen Andruck auf der Schneidrolle aufliegt. Diese Schneideinrichtungen weisen den Nachteil auf, daß in Abhängigkeit des Andruckes des Schneidrades auf die Schneidrolle verhältnismäßig schnell unerwünschte Kerben in die Schneidrolle eingeschnitten werden und sich die Schneide des Schneidrades verhältnismäßig schnell abnutzt.In one embodiment of the latter Cutting devices with cutting wheels is the paper web between the cutting wheel and a cutting roller performed, the cutting wheel with a certain There is pressure on the cutting roller. These cutters have the disadvantage that depending the pressure of the cutting wheel on the cutting roller relatively quickly unwanted notches in the Cutting roller can be cut and the cutting edge the cutting wheel wears out relatively quickly.

In einer weiteren Ausführungsform einer Schneideinrichtung in Rollendruckmaschinen ist die Papierbahn einem freistehenden Schneidrad mit einem verhältnismäßig großen Durchmesser zugeführt. Bei dieser Ausführungsform ist zwar die Schneide im Vergleich zu den vorgenannten Ausgestaltungen weniger abgenutzt, es ist jedoch verhältnismäßig aufwendig, bei wechselnden Papierstärken zum Erreichen einer guten Schneidwirkung die Maschinenparameter wie Zuführgeschwindigkeit und/oder Drehzahl des Schneidrades aufeinander abzustimmen, da beispielsweise die Zuführgeschwindigkeit häufig durch Druckvorgänge festgelegt ist.In a further embodiment of a cutting device in web printing machines is the paper web a freestanding cutter wheel with a relative large diameter supplied. In this embodiment is the cutting edge compared to the aforementioned Refinements less worn, but it is proportionate complex, with changing paper thicknesses the machine parameters to achieve a good cutting effect such as feed speed and / or speed the cutting wheel to coordinate with each other, for example the feeding speed is often due to printing processes is set.

Bei beiden Ausführungsformen von Schneideinrichtungen in Rollendruckmaschinen mit Schneidrädern ist es bedingt durch den verhältnismäßig großen Platzbedarf häufig nicht praktikabel, eine Rollendruckmaschine mit einer Schneideinrichtung zum Beschneiden von Papierbahnen mit häufigen wechselnden Breiten des abgetrennten Teiles nachzurüsten. In both embodiments of cutting devices in Web presses with cutting wheels are conditional often due to the relatively large space requirement not practical, a web press with a Cutting device for trimming paper webs with frequent changing widths of the separated part retrofit.

Der Erfindung liegt die Aufgabe zugrunde, eine Schneidvorrichtung der eingangs genannten Art zu schaffen, mit der ein dünner Gegenstand, insbesondere eine Papierbahn, mit einer sauberen Trennkante und mit in einfacher Weise einzustellenden Breiten zuschneidbar ist.The invention has for its object a Cutting device of the type mentioned create with a thin object, in particular a paper web with a clean separating edge and with widths that are easy to set can be cut to size.

Diese Aufgabe wird mit einer Schneidvorrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß die äußere Schneidflanke zylindrisch ist, daß die innere Schneidflanke in Richtung der Zentralachse angeschrägt ist, daß der Boden in Richtung der Zentralachse von dem Führungselement wegweisend gewölbt ist, und daß das Führungselement derart länglichen und mittig im Bereich der Zentralachse angeordnet ist, daß die Führungsfläche des Führungselementes rechtwinklig auf die Schneide steht.This task is accomplished with a cutting device initially mentioned type according to the invention solved that the outer cutting edge is cylindrical is that the inner cutting edge towards the Central axis is chamfered, that the bottom towards the central axis of that Guide element is curved forward, and that the guide element so elongated and central in the area of the central axis is arranged that the guide surface of the guide element is perpendicular to the cutting edge.

Durch das rechtwinklige Anordnen eines länglich ausgebildeten Führungselementes zu der Schneide ist durch die dadurch bedingte ebenfalls rechtwinklige Zuführung beispielsweise einer Papierbahn auf die Schneide eine saubere Trennkante erzeugt. Weiterhin ist der Gegenstand nach dem Durchtrennen umlenkungsfrei an der äußeren, zylindrisch ausgebildeten Schneidflanke vorbeigeführt, während der abgetrennte Materialstreifen bei einem Erstanschnitt nach Auftreffen auf den gewölbten Boden um das Führungselement umgelenkt und beispielsweise einer Abführeinrichtung aufgrund eines spannungsfreien Schnittes zielsicher zugeführt ist. Insbesondere auch nach einem Abriß des abgetrennten Materiales kann somit bei entsprechender Ausrichtung der Abführeinrichtung ein selbsttätiges Einfädeln des abgetrennten Materiales in die Abführeinrichtung erzielt werden. By placing an oblong one at right angles trained guide element to the cutting edge due to the resulting also rectangular Feeding, for example, a paper web on the Cut a clean cutting edge. Farther the object is free of deflection after cutting on the outer, cylindrical shape Cutting edge passed while the severed Material strips after a first cut Impact on the curved floor around the guide element deflected and, for example, a discharge device due to a tension-free Cut is fed unerringly. Especially even after the separated material has been torn off can thus with appropriate alignment of the discharge device an automatic threading of the separated material in the discharge device be achieved.

Die erfindungsgemäße Schneidvorrichtung gestattet weiterhin durch einfaches Versetzen des Ringmessers quer zu dem zu bearbeitenden dünnen Gegenstand eine einfache Einstellung der Breite des abgetrennten Materiales, welche lediglich durch den Durchmesser des Ringmessers begrenzt ist. Insbesondere muß dabei das Führungselement nicht nachjustiert werden.The cutting device according to the invention allows continue by simply moving the ring knife across the thin object to be processed easy adjustment of the width of the separated Material, which is only due to the diameter of the ring knife is limited. In particular, the guide element not be readjusted.

Ist das Schneiden mit verhältnismäßig häufig wechselnden Schnittbreiten notwendig, ist es zweckmäßig die Schneidvorrichtung an quer zu der Verschieberichtung ausgerichteten Stangen verschiebbar anzubringen, so daß in einfacher Weise durch Verschieben der Schneidvorrichtung verschiedene Schnittbreiten einstellbar sind.Is the cutting with relatively frequently changing Cutting widths necessary, it is expedient the cutting device on aligned transverse to the direction of displacement Slidably attach rods so that in simply by moving the cutting device different cutting widths can be set.

Bei einer Verwendung der erfindungsgemäßen Schneidvorrichtung in Verbindung mit einer Rollendruckmaschine sind dem Ringmesser insbesondere auch mehrfach übereinander gelegte Papierbahnen mit quer zu der Laufrichtung versetzten Rändern zuführbar, um sauber zugeschnittene Papierbahnen gleicher Breite zu erhalten. Überdies sind zum beidseitigen Bearbeiten die Schneidvorrichtungen ohne Änderung des mechanischen Aufbaus in Laufrichtung sowohl rechts als auch links über Kopf einbaubar. Bei Antrieb der Ringmesser durch Elektromotoren sind die Netzphasen für bezüglich der Papierbahn gleichsinniger Drehrichtung gegensinnig angeschlossen.When using the cutting device according to the invention in connection with a web press are the ring knife in particular several times one above the other laid paper webs with transverse to the running direction offset edges can be fed to cleanly cut Obtain paper webs of the same width. Moreover, the cutting devices are for double-sided processing without changing the mechanical structure in Running direction both right and left overhead built-in. When the ring knives are driven by electric motors are the network phases for the paper web connected in opposite directions in the same direction.

Weitere zweckmäßige Ausgestaltungen und Vorteile der Erfindung sind Gegenstand der Unteransprüche und der nachfolgenden Figurenbeschreibung. Es zeigen:

Fig. 1
in einer perspektivischen Ansicht ein bevorzugtes Ausführungsbeispiel der erfindungsgemäßen Schneidvorrichtung, die auf Gleitstangen verschiebbar ist,
Fig. 2
das Ausführungsbeispiel gemäß Fig. 1 mit einer zu beschneidenden Papierbahn in perspektivischer Darstellung und
Fig. 3
einen Schnitt durch ein Ausführungsbeispiel gemäß Fig. 1.
Further expedient refinements and advantages of the invention are the subject of the dependent claims and the following description of the figures. Show it:
Fig. 1
a perspective view of a preferred embodiment of the cutting device according to the invention, which is displaceable on slide rods,
Fig. 2
the embodiment of FIG. 1 with a paper web to be trimmed in perspective and
Fig. 3
2 shows a section through an exemplary embodiment according to FIG. 1.

Fig. 1 zeigt in einer perspektivischen Ansicht ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Schneidvorrichtung mit einem topfartigen Ringmesser 1. an dem durch eine äußere Messerflanke 2 und eine innere Messerflanke 3, die gegeneinander geneigt und ringförmig geschlossen sind, eine Schneide 4 ausgebildet ist. In diesem Ausführungsbeispiel ist die innere Messerflanke 3 gegen die äußere Messerflanke 2 in Richtung einer Zentralschraube 5 zulaufend angeschrägt, während die äußere Messerflanke 2 eine zylindrische Gestalt aufweist. Zwischen der inneren Messerflanke 3 ist ein Messerboden 6 vorgesehen, der an die innere Messerflanke 3 anstoßend die Innenfläche des Ringmessers 1 bedeckt.Fig. 1 shows a perspective view preferred embodiment of an inventive Cutting device with a pot-like ring knife 1. on the by an outer knife edge 2 and an inner Knife flank 3 which is inclined towards one another and annular are closed, a cutting edge 4 is formed. In In this exemplary embodiment, the inner knife flank 3 against the outer knife edge 2 in the direction of a Central screw 5 tapered while the outer knife edge 2 has a cylindrical shape. Between the inner knife edge 3 is a Knife bottom 6 is provided on the inner knife flank 3 covering the inner surface of the ring knife 1.

Das Ringmesser 1 ist über einen Abstandsring 7 drehbar an einer Grundplatte 8 befestigt. Der Durchmesser des Abstandsringes 7 entspricht dem Außendurchmesser des Ringmessers 1 beziehungsweise der äußeren Messerflanke 2. An dem Abstandsring 7 ist mit zwei Befestigungsschrauben 9, 10 ein Auflagetisch 11 angebracht, der sich längs des Abstandringes 7 von der Grundplatte 8 bis in den Bereich der Schneide 4 erstreckt. Im Bereich des Auflagetisches 11 fluchten das Ringmesser 1 sowie der Abstandsring 7 mit der Längsseite der Grundplatte 8.The ring knife 1 is rotatable via a spacer ring 7 attached to a base plate 8. The diameter of the Spacer ring 7 corresponds to the outer diameter of the Ring knife 1 or the outer knife edge 2. On the spacer ring 7 is with two fastening screws 9, 10 a support table 11 attached, the along the spacer ring 7 from the base plate 8 to in extends the area of the cutting edge 4. In the area of Support table 11 align the ring knife 1 and the Spacer ring 7 with the long side of the base plate 8.

An dem im Bereich der Schneide 4 angeordneten Ende des Auflagetisches 11 ist ein Schwenkscharnier 12 vorgesehen, mit dem um eine Scharnierachse 13 drehbar ein Schwenktisch 14 mit dem Auflagetisch 11 verbunden ist. Der Schwenktisch 14 erstreckt sich von einem dem Schwenkscharnier 12 benachbarten Abschnitt der Schneide 4 über die Innenseite des Ringmessers 1 bis zu dem gegenüberliegenden Abschnitt der Schneide 4.At the arranged in the area of the cutting edge 4 Support table 11, a swivel hinge 12 is provided, with the one rotatable about a hinge axis 13 Swivel table 14 connected to the support table 11 is. The swivel table 14 extends from one the pivot hinge 12 adjacent portion of the Cut 4 over the inside of the ring knife 1 to the opposite section of the cutting edge 4th

In dem in Fig. 1 dargestellten Ausführungsbeispiel ist eine Schwenkfläche 15 des Schwenktisches 14 auf dem Durchmesser des Ringmessers 1 angeordnet und steht im wesentlichen rechtwinklig auf der Schneide 4. Weiterhin tritt ein Teil der Schwenkfläche 15 über die Schneide 4 in Richtung des Messerbodens 6 in das Ringmesser 1 ein, wobei an dem an das Schwenkscharnier 12 angrenzende Ende des Schwenktisches 14 eine Schneideausnehmung 16 vorgesehen ist, in die die Schneide 4 eingreift. Die Länge des Schwenktisches 14 ist so bemessen, daß das dem Schwenkscharnier 12 gegenüberliegende Ende des Schwenktisches 14 im Bereich der inneren Messerflanke 3 abschließt. In der Ausrichtung gemäß Fig. 1 liegen die Schwenkfläche 15 und eine Auflagefläche 17 des Auflagetisches 11 in einer Ebene.In the embodiment shown in Fig. 1 is a swivel surface 15 of the swivel table 14 the diameter of the ring knife 1 arranged and stands essentially at right angles on the cutting edge 4. Part of the swivel surface 15 also occurs over the cutting edge 4 in the direction of the knife base 6 in the ring knife 1, on which at the Swivel hinge 12 adjacent end of the swivel table 14 a cutting recess 16 is provided is in which the cutting edge 4 engages. The length of the Swivel table 14 is dimensioned so that the Swivel hinge 12 opposite end of the Swivel table 14 in the area of the inner knife flank 3 completes. In the orientation according to Fig. 1 are the pivot surface 15 and a support surface 17 of the support table 11 in one plane.

An der Grundplatte 8 ist dem Ringmesser 1 gegenüberliegend ein elektrischer Antriebsmotor 18 angebracht, mit dem das Ringmesser 1 in zwei Drehrichtungen antreibbar ist. Auf der Rückseite der Grundplatte 8 sind in der Darstellung gemäß Fig. 1 nicht sichtbare Getriebeelemente vorgesehen, die mit einem Deckel 19 abgedeckt sind.On the base plate 8, the ring knife 1 is opposite an electric drive motor 18 is attached, with which the ring knife 1 in two directions is drivable. On the back of the base plate 8 are not in the illustration according to FIG. 1 visible gear elements provided with a cover 19 are covered.

Zwischen dem Ringmesser 1 und dem Antriebsmotor 18 ist an der Grundplatte 8 ein Führungsblock 20 befestigt, durch den eine erste Gleitstange 21 und eine zweite Gleitstange 22 durchgeführt sind. Die in Fig. 1 dargestellte Schneidvorrichtung ist von Hand entlang der Gleitstangen 21, 22 verschiebbar und an einer Position mit einem Arretierhebel 23 fixierbar.Between the ring knife 1 and the drive motor 18 a guide block 20 is attached to the base plate 8, through which a first slide rod 21 and a second slide rod 22 are performed. The 1 is shown by Hand along the Slide rods 21, 22 slidably and in one position fixable with a locking lever 23.

In einer abgewandelten, nicht dargestellten Ausführungsform ist die Schneidvorrichtung mit einem Verschiebeantrieb auf den Gleitstangen 21, 22 periodisch zwischen zwei Randpositionen verschiebbar.In a modified embodiment, not shown is the cutting device with a sliding drive on the slide rods 21, 22 periodically between two edge positions can be moved.

Die Gleitstangen 21, 22 sind mit jeweils einem Ende in ein Wandhalteteil 24 eingeführt und mit diesem fest verbunden. Das Wandhalteteil 24 ist mit Halteschrauben 25, 26, 27, 28 an einer Seitenwand beispielsweise einer Rollenrotationsmaschine befestigbar. In dem Ausführungsbeispiel gemäß Fig. 1 ist vorgesehen, daß das Wandhalteteil 24 auf einer Seite mit einem Andruckstück 29 befestigbar ist, wobei das Andruckstück 29 durch zwei Halteschrauben 27, 28 gehalten ist.The slide rods 21, 22 are in each with one end a wall holding part 24 inserted and fixed with this connected. The wall holding part 24 is with holding screws 25, 26, 27, 28 on one side wall, for example one Roll rotary machine attachable. In the embodiment 1 it is provided that the wall holding part 24 can be fastened on one side with a pressure piece 29 is, the pressure piece 29 by two Holding screws 27, 28 is held.

Fig. 2 zeigt in einer perspektivischen Ansicht die Schneidvorrichtung gemäß Fig. 1 im Betrieb beim Beschneiden einer in Fig. 2 ausschnittsweise dargestellten Papierbahn 30. Die Papierbahn 30 ist beispielsweise bei einer durch den Ausschnitt einer Seitenwand 31 dargestellten Rollenrotationsmaschine in einer durch einen Pfeil gekennzeichneten Förderrichtung 32 auf die mit dem Wandhalteteil 24 an der Seitenwand 31 angebrachten Schneidvorrichtung zugeführt. Die Papierbahn 30 liegt auf der Schwenkfläche 15 des Schwenktisches 14 sowie auf der in der Darstellung gemäß Fig. 2 nicht sichtbaren Auflagefläche 17 des Auflagetisches 11 auf. Ein auf der Schwenkfläche 15 aufliegender Abschnitt 33 der Papierbahn 30 ist mit der sich in einer durch einen Pfeil dargestellten Drehrichtung 34 in einer Drehebene drehenden Schneide 4 von der Papierbahn 30 abschneidbar. Die Drehebene der Schneide 4 ist in diesem Ausführungsbeispiel rechtwinklig zu der Förderrichtung 32 ausgerichtet. Ein Verschnittstreifen 35 mit einer konstanten Breite des Abschnittes 33 ist um den Schwenktisch 14 umgelenkt, in einer durch einen Pfeil gekennzeichneten Abfuhrrichtung 36 einer einen Absaugschlauch 37 aufweisenden Abführeinrichtung zugeführt und von der Schneidvorrichtung entfernt, während der übrige Teil der Papierbahn 30 an der äußeren Messerflanke 2, dem Abstandsring 7, der Grundplatte 8 sowie dem Deckel 19 vorbeiläuft. Auf diese Weise ist eine kontinuierliche Entsorgung des Verschnittstreifens 35 gewährleistet.Fig. 2 shows the in a perspective view 1 in operation when trimming one shown in detail in FIG. 2 Paper web 30. The paper web 30 is, for example, at one represented by the cutout of a side wall 31 Roll rotation machine in one by one Arrow marked conveying direction 32 to the Wall holding part 24 attached to the side wall 31 Cutting device fed. The paper web 30 lies on the swivel surface 15 of the swivel table 14 and on the not visible in the illustration of FIG. 2 Support surface 17 of the support table 11. One on the Pivoting surface 15 of section 33 of the paper web lying thereon 30 is with the one in an arrow shown direction of rotation 34 in a plane of rotation rotating cutting edge 4 can be cut from the paper web 30. The plane of rotation of the cutting edge 4 is in this embodiment aligned perpendicular to the conveying direction 32. A blend strip 35 with a constant Width of section 33 is around the swivel table 14 deflected, in one marked by an arrow Direction of discharge 36 a suction hose 37 having discharge device supplied and by the Cutting device removed while the rest of the Paper web 30 on the outer knife edge 2, the spacer ring 7, the base plate 8 and the cover 19th passes by. In this way it is continuous Disposal of the waste strip 35 guaranteed.

Bei einer periodischen Verschiebung der Schneidvorrichtung zwischen zwei Randpositionen entlang der Längsrichtung der Gleitstangen 21, 22 ist die Papierbahn 30 bei einer wechselnden Breite des Abschnittes 33 mit einem Wellenrand beschneidbar.With a periodic shifting of the cutting device between two edge positions along the The paper web is the longitudinal direction of the slide rods 21, 22 30 with a changing width of section 33 can be trimmed with a wave edge.

Weiterhin ist in Fig. 2 dargestellt, daß die Gleitstangen 21, 22 mit den von dem Wandhalteteil 24 wegweisenden Enden mit einem Stangenendteil 38 gehalten sind. Dadurch ist ein gleichbleibender Abstand zwischen den Gleitstangen 21, 22 und damit ein einwandfreies Gleiten des Führungsblockes 20 auf den Gleitstangen 21, 22 gewährleistet.Furthermore, it is shown in Fig. 2 that the slide rods 21, 22 with those pointing away from the wall holding part 24 Ends held with a rod end part 38 are. This creates a constant distance between the slide rods 21, 22 and thus a perfect one Sliding the guide block 20 on the slide rods 21, 22 guaranteed.

Zu Beginn des Beschneidungsvorganges stößt nach dem Anschnitt der Verschnittstreifen 35 auf den sich drehenden Messerboden 6 und ist in die Drehrichtung 34 abgelenkt. Bei einem entsprechenden Saugvermögen des an die Abführeinrichtung angeschlossenen Absaugschlauches 37 ist der Verschnittstreifen 35 bei einem Austritt aus dem Ringmesser 1 in Richtung der Seitenwand 31 selbsttätig angesaugt und abgeführt. At the beginning of the pruning process comes after the Cut of the cut strips 35 on the rotating knife base 6 and is in the direction of rotation 34 distracted. With a corresponding pumping speed of the the discharge device of the connected suction hose 37, the waste strip 35 is at an exit the ring knife 1 in the direction of the side wall 31 automatically sucked in and discharged.

Fig. 3 zeigt in einem Längsschnitt eine Schneidvorrichtung entsprechend Fig. 1 und Fig. 2 mit Antriebselementen zum Antreiben des Ringmessers 1. An einer Welle 39 des Antriebsmotors 18 ist eine Motorriemenscheibe 40 angebracht, die die Drehung der Welle 39 über einen in Fig. 3 nicht dargestellten Zahnriemen auf eine Messerriemenscheibe 41 überträgt. Der Zahnriemen ist mit einem Riemenspanner 42 spannbar, der exzentrisch in der Grundplatte 8 drehbar befestigt ist. Die Messerriemenscheibe 41 ist mit der Zentralschraube 5 mit dem Ringmesser 1 verbunden.3 shows a cutting device in a longitudinal section corresponding to Fig. 1 and Fig. 2 with drive elements to drive the ring knife 1. On one Shaft 39 of the drive motor 18 is a motor pulley 40 attached, the rotation of the shaft 39 over a toothed belt, not shown in Fig. 3 on a Knife pulley 41 transmits. The timing belt is included a belt tensioner 42, which is eccentric in the Base plate 8 is rotatably attached. The knife pulley 41 is with the central screw 5 with the ring knife 1 connected.

Die Zentralschraube 5 erstreckt sich in Längsrichtung durch eine Messersäule 43 des Ringmessers 1, wobei die Messersäule 43 mit zwei Säulenlagern 44, 45 in dem mit Befestigungsschrauben 46, 47 an der Grundplatte angebrachten Lagerring 7 frei drehbar gelagert ist.The central screw 5 extends in the longitudinal direction through a knife column 43 of the ring knife 1, the Knife column 43 with two column bearings 44, 45 in the with Attach fastening screws 46, 47 to the base plate Bearing ring 7 is freely rotatable.

In der Schneidvorrichtung gemäß Fig. 3 ist die in Richtung der Schwenkfläche 15 weisende Seite des Ringmessers 1 aus Sicherheitsgründen mit einer Messerabdeckplatte 48 abgedeckt, um Verletzungen durch den freistehenden Teil der Schneidkante 4 zu vermeiden. Weiterhin sind die Kanten des Schwenktisches 14 abgerundet, um bei einer quer zu der Längsrichtung der Zentralschraube 5 erfolgenden Zufuhr der Papierbahn 30 ein beschädigungsfreies Gleiten über den Schwenktisch 14 zu gewährleisten, auch wenn die Schwenkfläche 15 nicht exakt in der Ebene der Papierbahn angeordnet ist. Die Wölbung des Messerbodens 6 in Richtung der Zentralschraube 5 gewährleistet eine zuverlässige Umlenkung des Verschnittstreifens 35 bei einem Erstanschnitt der Papierbahn 30. Der Führungsblock 20 ist mit einer an die Gleitstange 21 andrückbaren Arretierschraube 49 gegen ein unbeabsichtigtes Verschieben der Schneidvorrichtung fixierbar.3 is the in Direction of the pivot surface 15 side of the ring knife 1 for safety reasons with a knife cover plate 48 covered to injuries from the detached Avoid part of the cutting edge 4. Farther the edges of the swivel table 14 are rounded to with a transverse to the longitudinal direction of the central screw 5 taking place the paper web 30 a damage-free Slide over the swivel table 14 to ensure, even if the pivot surface 15 is not is arranged exactly in the plane of the paper web. The Curvature of the knife base 6 in the direction of the central screw 5 ensures a reliable deflection of the Waste strip 35 at a first cut of Paper web 30. The guide block 20 is connected to the Slide rod 21 pressable locking screw 49 against an unintentional displacement of the cutting device fixable.

Claims (10)

  1. A cutting apparatus for cutting a cutting waste strip from a thin flexible article (30) which is oriented in a flat condition, comprising a ring-shaped blade which is rotatable about a central axis (5) and which has an annularly closed outer cutting flank and an annularly closed inner cutting flank which converge relative to each other inclinedly to form an annular cutting edge (4) and are mounted to an end portion (6), and comprising an elongate guide element which extends within the inner cutting flank and which crosses the ring diameter for guiding the article (30) to be processed, characterised in that the outer cutting flank (2) is cylindrical, that the inner cutting flank (3) is bevelled in the direction of the central axis (5), that the end portion (6) is curved in the direction of the central axis (5) facing away from the guide element (14) and that the guide element (14) is elongate and arranged centrally in the region of the central axis (5) in such a way that the guide surface (15) of the guide element (14) is at a right angle to the cutting edge (4).
  2. A cutting apparatus according to claim 1 characterised in that the guide element is a table (14) which is mounted in front of the cutting edge (4) and which has a surface (15) that is disposed transversely relative to the cutting edge (4).
  3. A cutting apparatus according to claim 2 characterised in that a part of the surface (15) of the table (14) is arranged to project between the inner cutting flank (3) into the ring-shaped blade (1).
  4. A cutting apparatus according to claim 2 or claim 3 characterised in that the surface (15) of the table (14) is arranged in the region of the largest diameter of the cutting edge (4).
  5. A cutting apparatus according to one of claims 2, 3 and 4 characterised in that the surface (15) of the table (14) is pivotable.
  6. A cutting apparatus according to claim 5 characterised in that the table (14) and an outer table (11) adjoining the outer cutting flank (2) are connected together by way of a hinge (12), the table (14) being pivotable about an axis (13) of the hinge (12).
  7. A cutting apparatus according to one of claims 1 to 6 characterised in that there is provided a positioning device with which the ring-shaped blade (1) and the guide element (14) are displaceable in the longitudinal direction of the guide element (14).
  8. A cutting apparatus according to claim 7 characterised in that the ring-shaped blade (1) and the guide element (14) are displaceable periodically between two boundary positions.
  9. A cutting apparatus according to claim 8 characterised in that the ring-shaped blade (1) and the guide element (14) can be mounted by way of slide bars (21, 22) of the positioning device to a side wall (31) in particular of a roll rotation machine.
  10. A cutting apparatus according to one of claims 1 to 9 characterised in that there is provided a discharge device (37) with which a portion (35) which is cut off the article (30) and which is diverted by the guide element (14) and the end portion (6) can be continuously carried away.
EP95925737A 1994-08-13 1995-07-26 Cutter with ring-shaped blade Expired - Lifetime EP0775040B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4428785 1994-08-13
DE4428785A DE4428785C1 (en) 1994-08-13 1994-08-13 Cutting device
PCT/DE1995/000987 WO1996005029A1 (en) 1994-08-13 1995-07-26 Cutter with ring-shaped blade

Publications (2)

Publication Number Publication Date
EP0775040A1 EP0775040A1 (en) 1997-05-28
EP0775040B1 true EP0775040B1 (en) 1998-10-21

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EP (1) EP0775040B1 (en)
AT (1) ATE172399T1 (en)
AU (1) AU2976295A (en)
DE (2) DE4428785C1 (en)
ES (1) ES2126912T3 (en)
WO (1) WO1996005029A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR565551A (en) * 1923-04-26 1924-01-30 Leather cutting machine
US1930489A (en) * 1932-01-15 1933-10-17 United Shoe Machinery Corp Skiving machine
BE522639A (en) * 1952-12-21 1953-09-30
DE2750835C3 (en) * 1977-11-14 1980-06-19 Jagenberg-Werke Ag, 4000 Duesseldorf Device for the continuous peeling off of longitudinal strips from a packaging web
FR2526444A1 (en) * 1982-05-04 1983-11-10 Despaux Marc Fleshing machine to thin hides partic. for taxidermy - guides hand fed hides to annular cutting edge of motorised wheel
US4621956A (en) * 1984-10-01 1986-11-11 Hartman Steven D Method and apparatus for cutting of flexible foam material

Also Published As

Publication number Publication date
EP0775040A1 (en) 1997-05-28
WO1996005029A1 (en) 1996-02-22
DE59504006D1 (en) 1998-11-26
ATE172399T1 (en) 1998-11-15
ES2126912T3 (en) 1999-04-01
DE4428785C1 (en) 1996-02-22
AU2976295A (en) 1996-03-07

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