EP0642461B1 - Vorrichtung zum geraderichten einer kontinuierlich laufenden bahn, beispielsweise aus karton - Google Patents

Vorrichtung zum geraderichten einer kontinuierlich laufenden bahn, beispielsweise aus karton Download PDF

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Publication number
EP0642461B1
EP0642461B1 EP94911214A EP94911214A EP0642461B1 EP 0642461 B1 EP0642461 B1 EP 0642461B1 EP 94911214 A EP94911214 A EP 94911214A EP 94911214 A EP94911214 A EP 94911214A EP 0642461 B1 EP0642461 B1 EP 0642461B1
Authority
EP
European Patent Office
Prior art keywords
cylinders
sheet
bearings
supports
straightening
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
EP94911214A
Other languages
English (en)
French (fr)
Other versions
EP0642461A1 (de
Inventor
Jean-Pierre Roux
Pierrick Daniel
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.)
Komori Chambon SA
Original Assignee
Komori Chambon SA
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 Komori Chambon SA filed Critical Komori Chambon SA
Publication of EP0642461A1 publication Critical patent/EP0642461A1/de
Application granted granted Critical
Publication of EP0642461B1 publication Critical patent/EP0642461B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/34—Apparatus for taking-out curl from webs

Definitions

  • the present invention relates to a device for straightening a sheet of material, for example cardboard, scrolling continuously, cut from a reel.
  • webs are used which are cut continuously from a reel and which are then cut, after having been previously printed or not.
  • This is, for example, the case of a machine for manufacturing pieces or "blanks" of cardboard, intended to subsequently constitute boxes, these blanks being cut from a sheet of cardboard supplied from a reel. Since this cardboard sheet is wound on itself in the reel it constitutes, it subsequently retains a certain "shape memory" and therefore, when cutting blanks from the sheet of cardboard, these have a certain tendency to resume the natural curved shape of the sheet, within the coil formed by the latter.
  • the radius of curvature of the natural shape of the cut cardboard blanks varies depending on the turn of the sheet considered, the radius of curvature being naturally much greater in the vicinity of the periphery of the reel than in the central part of that -this.
  • the devices known straightening comprises (see for example EP-A-0 341 971) a pair of return cylinders with parallel axes on which the web passes by forming a flat section contained in the plane tangent to the two return cylinders, and a block rectifier mounted movable between the two return cylinders, in a direction perpendicular to the plane of the ply between these two cylinders.
  • This rectifier block comprises at least one pressure member extending transversely with respect to the ply and which can come to bear, by exerting pressure, on a face of the planar section of the ply, so as to repel it outside the plane tangent to the two return cylinders and thus create a V-shaped ply section between the two cylinders.
  • This action of the mobile rectifier block pressure member makes it possible to break the fibers of the cardboard somewhat and to counterbalance the natural curvature of the cardboard web, which makes it possible to obtain flat cardboard blanks later.
  • the present invention aims to remedy this drawback by providing a straightening device of particularly simple design and which by itself provides automatic compensation for the length of the ply.
  • this device for straightening a sheet of material, for example cardboard, continuously scrolling, cut from a reel, comprising a frame comprising supports for the bearings of two return cylinders, with parallel axes , over which the ply passes by forming a flat section contained in a plane tangent to the two cylinders, and a rectifier block mounted movably between the two return cylinders, perpendicular to the ply section extending between these two cylinders, this rectifier block mobile comprising at least one transverse pressure member capable of coming to bear on one face of the ply to push it out of the plane tangent to the two cylinders and give it the shape of a V between these two cylinders, is characterized in that the bearing supports of the two return cylinders constitute guides for the bearings mounted movable on these supports and connecting means are provided between the movable rectifier block and the bearings of the return cylinders so as to reduce the distance between the axes of the two cylinders of return as a function
  • Figure 1 is a simplified schematic elevational view of a device for straightening a sheet fed from a coil, the movable rectifier block being shown in the inactive position in which it does not act on the sheet.
  • Figure 2 is a simplified schematic elevational view similar to that of Figure 1, the movable rectifier block being shown in an active position in which it causes a V-shaped deformation of the web.
  • Figure 3 is an elevational view of an alternative embodiment of the straightening device.
  • the straightening device according to the invention is intended to act on a web 2 continuously scrolling and which is delivered at from an upstream coil 3.
  • the sheet 2 can be a sheet of any material having a "shape memory", that is to say which tends to resume, when it is cut into pieces, downstream , its natural curved shape which it had previously within the reel 3.
  • shape memory that is to say which tends to resume, when it is cut into pieces, downstream , its natural curved shape which it had previously within the reel 3.
  • the axis of the coil 3 and the axes of all the cylinders 4,5,6,7 are horizontal and transverse with respect to the direction of travel of the web 2.
  • the rectifying device 1 comprises a rectifier block 8 which is disposed between the two return cylinders 5 and 6.
  • This rectifier block 8 is mounted vertically movable on the frame, not shown, of the device 1, as it is indicated by the arrow f.
  • the rectifier block 8 can move perpendicular to the horizontal section 2a of the ply 2 which is located in the upper plane P tangent horizontally to the two return cylinders 5 and 6.
  • the rectifier block 8 comprises two pressure members s' extending transversely, namely an upper horizontal and transverse rod 9, situated above the section 2a of the ply, and a lower horizontal and transverse rod 11 situated below the section 2a.
  • the stems of pressure 9 and 11 are separated from each other by a small interval and they can act respectively on the ply section 2a, according to the direction of movement of the rectifier block 8. This arrangement corresponds to the case where the action of compensation for curvature should be exercised in both directions. If the natural curvature of the ply must always be compensated in the same direction, it goes without saying that the rectifier block 8 could then comprise only one of the rods 9 or 11.
  • the respective bearings 12 and 13 of the return cylinders 5 and 6 are mounted mobile on appropriate supports 14,15 provided on the frame of the straightening device 1, these supports 14,15 being constituted by housings or cams which can be straight.
  • connection means are provided between the rectifier block 8 and the bearings 12, 13 of the return cylinders 5,6.
  • These connecting means may preferably be of the mechanical type and they may then be constituted, as shown in FIGS. 1 and 2, by connecting rods 16 and 17, both located below the horizontal section 2a of the ply and which are articulated, at one of their ends, on the rectifier block 8, around respective axes 18,19 and, at their other ends, on the bearings 12, 13 of the return cylinders 5,6.
  • the axes 18, 19 of articulation of the connecting rods 16, 17 are situated at a level lower than that of the lower rod 11 and symmetrically with respect to the vertical and transverse plane P1 containing the axes of the rods 9 and 11.
  • the axes of the cylinders 5,6 are separated by a distance d and the connecting rods 16,17 can extend horizontally, as shown in FIG. 1, or else they can be inclined relative to the horizontal, the angle of inclination depending on the geometry of the straightening device.
  • the housings or cams 14, 15 which constitute the guide supports for the movable bearings 12, 13 of the return cylinders 5, 6 can also be horizontal or else inclined relative to the horizontal, depending the geometry of the straightening device.
  • the straightening block 8 When the straightening device 1 is put into service, that is to say it is placed in an active position as shown in FIG. 2, the straightening block 8 is lowered so that its upper pressure rod 9 comes into contact with the upper face of the ply section 2a and then pushes this section down, giving the ply section 2a a V shape with a point directed downwards, as shown in the figure 2.
  • This action of the upper pressure rod 9 has the effect of breaking the fibers of the cardboard web and of compensating for the natural curvature of the cardboard blanks cut later which would tend to have a "bulge” or an upward convexity. , due to the "shape memory" of the cardboard constituting the ply wound in the form of the coil 3.
  • the supports 14, 15 constituting movable bearings 12, 13 of the return cylinders 5, 6 are preferably inclined from bottom to top, in the direction of the central rectifier block 8, the 12,13 steps are not only close together but also slightly elevated as it appears in Figure 2, causing a slight elongation of the web.
  • the rectifier block 8 would then be moved upwards, its lower rod 11 would raise the ply section 2a, in order to form a V-shaped section with point directed upwards, the axes 18,19 of the connecting rods 16,17 would be driven upwards, by passing the connecting rods in downwardly inclined positions 3 and in the direction of the return cylinders 5,6, and the bearings 12,13 would again be close together and slightly raised on their supports 14,15.
  • the same compensation effect would be obtained for the variation in length of the ply 2.
  • the upstream 5 and downstream 6 return cylinders are situated respectively below and above the horizontal tangent plane P along which the horizontal section 2a of the ply 2 extends. Otherwise said, the ply 2 passes under the downstream return cylinder 6 and it is then deflected upwards, in the direction of the downstream debtor cylinder 7 which is located above the plane P.
  • the connecting rods 16 connected to the bearings 12 of the upstream return cylinder 5 are located under the horizontal section 2a of the ply 2, while the connecting rods 17 connected to the bearings 13 of the downstream return cylinder 6 are located above this horizontal section 2a.
  • the axes of articulation 18,19 of the connecting rods 16,17 on the rectifier block 8 are symmetrical to each other with respect to the intersection of the horizontal plane P and the vertical plane P1.
  • the straightening device shown in Figure 3 is particularly interesting because it can allow 100% compensation for the variation in length of the ply 2 by playing on the profiles of the cams 14.15 constituting the supports of the bearings 12.13.
  • connecting means between the movable rectifier block 8 and the return cylinders 5,6 have been described as being constituted by connecting rods, it goes without saying that they could be produced in any other way, in particular by pneumatic means , hydraulic, electric etc ... controlling the movement of the mobile bearings 12,13 of the return cylinders 5,6 to the movement of the rectifier block 8.

Claims (4)

  1. Vorrichtung zum Geraderichten (1) einer kontinuierlich laufenden Bahn (2), beispielsweise aus Karton, die von einer Spule (3) ausgegeben wird, aufweisend: einen Maschinenrahmen mit Trägern (14, 15) für Wellenlager (12, 13) von zwei Umlenkzylindern (5, 6), deren Achsen parallel sind und über welche die Bahn läuft, wobei sie dabei einen ebenen Abschnitt (2a) bildet, der in einer die beiden Zylindern tangierenden Ebene (P) liegt, sowie einen Richtblock (8), der beweglich zwischen den beiden Umlenkzylindern (5, 6) angebracht ist, und zwar senkrecht zu dem sich zwischen den beiden Zylindern (5, 6) erstreckenden Bahnabschnitt (2a), wobei dieser bewegliche Richtblock (8) mindestens eine Querdruckeinrichtung (9, 11) aufweist, die auf einer Seite der Bahn (2) zur Auflage kommen kann, um diese aus der die beiden Zylinder tangierenden Ebene (P) herauszudrücken und ihr die Form eines zwischen den beiden Zylindern befindlichen V zu erteilen, dadurch gekennzeichnet, daß die Träger (14, 15) der Wellenlager (12, 13) der beiden Umlenkzylinder (5, 6) Führungen für die Wellenlager (12, 13) bilden, welche beweglich an diesen Trägern angebracht sind, und Verbindungseinrichtungen (16, 17) zwischen dem beweglichen Richtblock (8) und den Lagern (12, 13) der Umlenkzylinder (5, 6) vorgesehen sind, derart daß der Abstand (d) zwischen den Achsen der beiden Umlenkzylinder (5, 6) in Abhängigkeit von der Amplitude der V-förmigen Verformung der Bahn (2) verringert wird und auf diese Weise automatisch eine Längenveränderung dieser Bahn kompensiert wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Träger (14, 15), welche Führungen für die Wellenlager (12, 13) bilden, durch geradlinige Aufnahmen oder Kurvenscheiben gebildet werden, welche bezüglich der die beiden Umlenkzylinder (5, 6) tangierenden Ebene (P) geneigt sind.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Träger (14, 15), welche Führungen für die Wellenlager (12, 13) bilden, durch nicht geradlinige Aufnahmen oder Kurvenscheiben gebildet werden.
  4. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Verbindungseinrichtungen durch Koppelstangen (16, 17) gebildet werden, die mit einem ihrer Enden über jeweilige Achsen (18, 19) am Richtblock (8) und mit ihren anderen Enden an den Wellenlagern (12, 13) der Umlenkzylinder (5, 6) angelenkt sind.
EP94911214A 1993-03-24 1994-03-24 Vorrichtung zum geraderichten einer kontinuierlich laufenden bahn, beispielsweise aus karton Expired - Lifetime EP0642461B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9303398 1993-03-24
FR9303398A FR2702993B1 (fr) 1993-03-24 1993-03-24 Dispositif de redressement d'une nappe de matiere, par exemple de carton, defilant en continu .
PCT/FR1994/000327 WO1994021546A1 (fr) 1993-03-24 1994-03-24 Dispositif de redressement d'une nappe de matiere, par exemple de carton, defilant en continu

Publications (2)

Publication Number Publication Date
EP0642461A1 EP0642461A1 (de) 1995-03-15
EP0642461B1 true EP0642461B1 (de) 1997-08-27

Family

ID=9445303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94911214A Expired - Lifetime EP0642461B1 (de) 1993-03-24 1994-03-24 Vorrichtung zum geraderichten einer kontinuierlich laufenden bahn, beispielsweise aus karton

Country Status (5)

Country Link
EP (1) EP0642461B1 (de)
JP (1) JPH07507530A (de)
DE (1) DE69405180T2 (de)
FR (1) FR2702993B1 (de)
WO (1) WO1994021546A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19713207A1 (de) * 1997-03-28 1998-10-01 Bielomatik Leuze & Co Richtvorrichtung für Lagenmaterial, insbesondere Papier
JP5165418B2 (ja) * 2008-03-06 2013-03-21 株式会社ミヤコシ デカーラ装置及びこのデカーラ装置を用いた連続紙加工装置
CN102179961B (zh) * 2011-04-27 2012-08-22 朱青东 瓦楞纸板卷翘的校平装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01285557A (ja) * 1988-05-10 1989-11-16 Kobayashi Seisakusho:Kk シートカール矯正装置

Also Published As

Publication number Publication date
DE69405180T2 (de) 1998-04-02
JPH07507530A (ja) 1995-08-24
WO1994021546A1 (fr) 1994-09-29
FR2702993A1 (fr) 1994-09-30
EP0642461A1 (de) 1995-03-15
FR2702993B1 (fr) 1995-12-08
DE69405180D1 (de) 1997-10-02

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